all: remove code which is not being considered in build

These xlators are now removed from build as per discussion/announcement
done at https://lists.gluster.org/pipermail/gluster-users/2018-July/034400.html

* move rot-13 to playground, as it is used only as demo
  purpose, and is documented in many places.

* Removed code of below xlators:
  - cluster/stripe
  - cluster/tier
  - features/changetimerecorder
  - features/glupy
  - performance/symlink-cache
  - encryption/crypt
  - storage/bd
  - experimental/posix2
  - experimental/dht2
  - experimental/fdl
  - experimental/jbr

updates: bz#1635688
Change-Id: I1d2d63c32535e149bc8dcb2daa76236c707996e8
Signed-off-by: Amar Tumballi <amarts@redhat.com>

11 files changed, 0 insertions, 11078 deletions

diff --git a/xlators/cluster/dht/src/tier-common.c b/xlators/cluster/dht/src/tier-common.c
deleted file mode 100644
index b22f4776ada..00000000000
--- a/xlators/cluster/dht/src/tier-common.c
+++ /dev/null
@@ -1,1199 +0,0 @@
-/*
-  Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#include <glusterfs/glusterfs.h>
-#include <glusterfs/xlator.h>
-#include "libxlator.h"
-#include "dht-common.h"
-#include <glusterfs/defaults.h>
-#include "tier-common.h"
-#include "tier.h"
-
-int
-dht_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-             int op_errno, inode_t *inode, struct iatt *stbuf,
-             struct iatt *preparent, struct iatt *postparent, dict_t *xdata);
-
-int
-tier_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-              int op_errno, inode_t *inode, struct iatt *stbuf,
-              struct iatt *preparent, struct iatt *postparent, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    loc_t *oldloc = NULL;
-    loc_t *newloc = NULL;
-
-    local = frame->local;
-
-    oldloc = &local->loc;
-    newloc = &local->loc2;
-
-    if (op_ret == -1) {
-        /* No continuation on DHT inode missing errors, as we should
-         * then have a good stbuf that states P2 happened. We would
-         * get inode missing if, the file completed migrated between
-         * the lookup and the link call */
-        goto out;
-    }
-
-    if (local->call_cnt != 1) {
-        goto out;
-    }
-
-    local->call_cnt = 2;
-
-    /* Do this on the hot tier now */
-
-    STACK_WIND(frame, tier_link_cbk, local->cached_subvol,
-               local->cached_subvol->fops->link, oldloc, newloc, xdata);
-
-    return 0;
-
-out:
-    DHT_STRIP_PHASE1_FLAGS(stbuf);
-
-    DHT_STACK_UNWIND(link, frame, op_ret, op_errno, inode, stbuf, preparent,
-                     postparent, NULL);
-
-    return 0;
-}
-
-int
-tier_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
-          dict_t *xdata)
-{
-    xlator_t *cached_subvol = NULL;
-    xlator_t *hashed_subvol = NULL;
-    int op_errno = -1;
-    int ret = -1;
-    dht_local_t *local = NULL;
-    dht_conf_t *conf = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(oldloc, err);
-    VALIDATE_OR_GOTO(newloc, err);
-
-    conf = this->private;
-
-    local = dht_local_init(frame, oldloc, NULL, GF_FOP_LINK);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->call_cnt = 1;
-
-    cached_subvol = local->cached_subvol;
-
-    if (!cached_subvol) {
-        gf_msg_debug(this->name, 0, "no cached subvolume for path=%s",
-                     oldloc->path);
-        op_errno = ENOENT;
-        goto err;
-    }
-
-    hashed_subvol = TIER_HASHED_SUBVOL;
-
-    ret = loc_copy(&local->loc2, newloc);
-    if (ret == -1) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    if (hashed_subvol == cached_subvol) {
-        STACK_WIND(frame, dht_link_cbk, cached_subvol,
-                   cached_subvol->fops->link, oldloc, newloc, xdata);
-        return 0;
-    }
-
-    /* Create hardlinks to both the data file on the hot tier
-       and the linkto file on the cold tier */
-
-    gf_uuid_copy(local->gfid, oldloc->inode->gfid);
-
-    STACK_WIND(frame, tier_link_cbk, hashed_subvol, hashed_subvol->fops->link,
-               oldloc, newloc, xdata);
-
-    return 0;
-err:
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    DHT_STACK_UNWIND(link, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL);
-    return 0;
-}
-
-int
-tier_create_unlink_stale_linkto_cbk(call_frame_t *frame, void *cookie,
-                                    xlator_t *this, int op_ret, int op_errno,
-                                    struct iatt *preparent,
-                                    struct iatt *postparent, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-
-    local = frame->local;
-
-    if (local->params) {
-        dict_del(local->params, GLUSTERFS_INTERNAL_FOP_KEY);
-    }
-
-    DHT_STACK_UNWIND(create, frame, -1, local->op_errno, NULL, NULL, NULL, NULL,
-                     NULL, NULL);
-
-    return 0;
-}
-
-int
-tier_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                int op_errno, fd_t *fd, inode_t *inode, struct iatt *stbuf,
-                struct iatt *preparent, struct iatt *postparent, dict_t *xdata)
-{
-    xlator_t *prev = NULL;
-    int ret = -1;
-    dht_local_t *local = NULL;
-    xlator_t *hashed_subvol = NULL;
-    dht_conf_t *conf = NULL;
-
-    local = frame->local;
-    conf = this->private;
-
-    hashed_subvol = TIER_HASHED_SUBVOL;
-
-    if (!local) {
-        op_ret = -1;
-        op_errno = EINVAL;
-        goto out;
-    }
-
-    if (op_ret == -1) {
-        if (local->linked == _gf_true && local->xattr_req) {
-            local->op_errno = op_errno;
-            local->op_ret = op_ret;
-            ret = dht_fill_dict_to_avoid_unlink_of_migrating_file(
-                local->xattr_req);
-            if (ret) {
-                gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED,
-                       "Failed to set dictionary value to "
-                       "unlink of migrating file");
-                goto out;
-            }
-
-            STACK_WIND(frame, tier_create_unlink_stale_linkto_cbk,
-                       hashed_subvol, hashed_subvol->fops->unlink, &local->loc,
-                       0, local->xattr_req);
-            return 0;
-        }
-        goto out;
-    }
-
-    prev = cookie;
-
-    if (local->loc.parent) {
-        dht_inode_ctx_time_update(local->loc.parent, this, preparent, 0);
-
-        dht_inode_ctx_time_update(local->loc.parent, this, postparent, 1);
-    }
-
-    ret = dht_layout_preset(this, prev, inode);
-    if (ret != 0) {
-        gf_msg_debug(this->name, 0, "could not set preset layout for subvol %s",
-                     prev->name);
-        op_ret = -1;
-        op_errno = EINVAL;
-        goto out;
-    }
-
-    local->op_errno = op_errno;
-
-    if (local->linked == _gf_true) {
-        local->stbuf = *stbuf;
-        dht_linkfile_attr_heal(frame, this);
-    }
-out:
-    if (local) {
-        if (local->xattr_req) {
-            dict_del(local->xattr_req, TIER_LINKFILE_GFID);
-        }
-    }
-
-    DHT_STRIP_PHASE1_FLAGS(stbuf);
-
-    DHT_STACK_UNWIND(create, frame, op_ret, op_errno, fd, inode, stbuf,
-                     preparent, postparent, xdata);
-
-    return 0;
-}
-
-int
-tier_create_linkfile_create_cbk(call_frame_t *frame, void *cookie,
-                                xlator_t *this, int32_t op_ret,
-                                int32_t op_errno, inode_t *inode,
-                                struct iatt *stbuf, struct iatt *preparent,
-                                struct iatt *postparent, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    xlator_t *cached_subvol = NULL;
-    dht_conf_t *conf = NULL;
-    int ret = -1;
-    unsigned char *gfid = NULL;
-
-    local = frame->local;
-    if (!local) {
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    if (op_ret == -1) {
-        local->op_errno = op_errno;
-        goto err;
-    }
-
-    conf = this->private;
-    if (!conf) {
-        local->op_errno = EINVAL;
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    cached_subvol = TIER_UNHASHED_SUBVOL;
-
-    if (local->params) {
-        dict_del(local->params, conf->link_xattr_name);
-        dict_del(local->params, GLUSTERFS_INTERNAL_FOP_KEY);
-    }
-
-    /*
-     * We will delete the linkfile if data file creation fails.
-     * When deleting this stale linkfile, there is a possibility
-     * for a race between this linkfile deletion and a stale
-     * linkfile deletion triggered by another lookup from different
-     * client.
-     *
-     * For eg:
-     *
-     *     Client 1                        Client 2
-     *
-     * 1   linkfile created for foo
-     *
-     * 2   data file creation failed
-     *
-     * 3                                   creating a file with same name
-     *
-     * 4                                   lookup before creation deleted
-     *                                     the linkfile created by client1
-     *                                     considering as a stale linkfile.
-     *
-     * 5                                   New linkfile created for foo
-     *                                     with different gfid.
-     *
-     * 6 Trigger linkfile deletion as
-     *   data file creation failed.
-     *
-     * 7 Linkfile deleted which is
-     *   created by client2.
-     *
-     * 8                                   Data file created.
-     *
-     * With this race, we will end up having a file in a non-hashed subvol
-     * without a linkfile in hashed subvol.
-     *
-     * To avoid this, we store the gfid of linkfile created by client, So
-     * If we delete the linkfile , we validate gfid of existing file with
-     * stored value from posix layer.
-     *
-     * Storing this value in local->xattr_req as local->params was also used
-     * to create the data file. During the linkfile deletion we will use
-     * local->xattr_req dictionary.
-     */
-    if (!local->xattr_req) {
-        local->xattr_req = dict_new();
-        if (!local->xattr_req) {
-            local->op_errno = ENOMEM;
-            op_errno = ENOMEM;
-            goto err;
-        }
-    }
-
-    gfid = GF_MALLOC(sizeof(uuid_t), gf_common_mt_char);
-    if (!gfid) {
-        local->op_errno = ENOMEM;
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    gf_uuid_copy(gfid, stbuf->ia_gfid);
-    ret = dict_set_dynptr(local->xattr_req, TIER_LINKFILE_GFID, gfid,
-                          sizeof(uuid_t));
-    if (ret) {
-        GF_FREE(gfid);
-        gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED,
-               "Failed to set dictionary value"
-               " : key = %s",
-               TIER_LINKFILE_GFID);
-    }
-
-    STACK_WIND_COOKIE(frame, tier_create_cbk, cached_subvol, cached_subvol,
-                      cached_subvol->fops->create, &local->loc, local->flags,
-                      local->mode, local->umask, local->fd, local->params);
-
-    return 0;
-err:
-    DHT_STACK_UNWIND(create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL,
-                     NULL);
-    return 0;
-}
-
-gf_boolean_t
-tier_is_hot_tier_decommissioned(xlator_t *this)
-{
-    dht_conf_t *conf = NULL;
-    xlator_t *hot_tier = NULL;
-    int i = 0;
-
-    conf = this->private;
-    hot_tier = conf->subvolumes[1];
-
-    if (conf->decommission_subvols_cnt) {
-        for (i = 0; i < conf->subvolume_cnt; i++) {
-            if (conf->decommissioned_bricks[i] &&
-                conf->decommissioned_bricks[i] == hot_tier)
-                return _gf_true;
-        }
-    }
-
-    return _gf_false;
-}
-
-int
-tier_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-            mode_t mode, mode_t umask, fd_t *fd, dict_t *params)
-{
-    int op_errno = -1;
-    dht_local_t *local = NULL;
-    dht_conf_t *conf = NULL;
-    xlator_t *hot_subvol = NULL;
-    xlator_t *cold_subvol = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-
-    conf = this->private;
-
-    dht_get_du_info(frame, this, loc);
-
-    local = dht_local_init(frame, loc, fd, GF_FOP_CREATE);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    cold_subvol = TIER_HASHED_SUBVOL;
-    hot_subvol = TIER_UNHASHED_SUBVOL;
-
-    if (conf->subvolumes[0] != cold_subvol) {
-        hot_subvol = conf->subvolumes[0];
-    }
-    /*
-     * if hot tier full, write to cold.
-     * Also if hot tier is full, create in cold
-     */
-    if (dht_is_subvol_filled(this, hot_subvol) ||
-        tier_is_hot_tier_decommissioned(this)) {
-        gf_msg_debug(this->name, 0, "creating %s on %s", loc->path,
-                     cold_subvol->name);
-
-        STACK_WIND_COOKIE(frame, tier_create_cbk, cold_subvol, cold_subvol,
-                          cold_subvol->fops->create, loc, flags, mode, umask,
-                          fd, params);
-    } else {
-        local->params = dict_ref(params);
-        local->flags = flags;
-        local->mode = mode;
-        local->umask = umask;
-        local->cached_subvol = hot_subvol;
-        local->hashed_subvol = cold_subvol;
-
-        gf_msg_debug(this->name, 0, "creating %s on %s (link at %s)", loc->path,
-                     hot_subvol->name, cold_subvol->name);
-
-        dht_linkfile_create(frame, tier_create_linkfile_create_cbk, this,
-                            hot_subvol, cold_subvol, loc);
-
-        goto out;
-    }
-out:
-    return 0;
-
-err:
-
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    DHT_STACK_UNWIND(create, frame, -1, op_errno, NULL, NULL, NULL, NULL, NULL,
-                     NULL);
-
-    return 0;
-}
-
-int
-tier_unlink_nonhashed_linkfile_cbk(call_frame_t *frame, void *cookie,
-                                   xlator_t *this, int op_ret, int op_errno,
-                                   struct iatt *preparent,
-                                   struct iatt *postparent, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    xlator_t *prev = NULL;
-
-    local = frame->local;
-    prev = cookie;
-
-    LOCK(&frame->lock);
-    {
-        if ((op_ret == -1) && (op_errno != ENOENT)) {
-            local->op_errno = op_errno;
-            local->op_ret = op_ret;
-            gf_msg_debug(this->name, op_errno,
-                         "Unlink link: subvolume %s"
-                         " returned -1",
-                         prev->name);
-            goto unlock;
-        }
-
-        local->op_ret = 0;
-    }
-unlock:
-    UNLOCK(&frame->lock);
-
-    if (local->op_ret == -1)
-        goto err;
-    DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno,
-                     &local->preparent, &local->postparent, NULL);
-
-    return 0;
-
-err:
-    DHT_STACK_UNWIND(unlink, frame, -1, local->op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int
-tier_unlink_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int op_ret, int op_errno, inode_t *inode,
-                       struct iatt *preparent, dict_t *xdata,
-                       struct iatt *postparent)
-{
-    dht_local_t *local = NULL;
-    xlator_t *prev = NULL;
-    dht_conf_t *conf = NULL;
-    xlator_t *hot_subvol = NULL;
-
-    local = frame->local;
-    prev = cookie;
-    conf = this->private;
-    hot_subvol = TIER_UNHASHED_SUBVOL;
-
-    if (!op_ret) {
-        /*
-         * linkfile present on hot tier. unlinking the linkfile
-         */
-        STACK_WIND_COOKIE(frame, tier_unlink_nonhashed_linkfile_cbk, hot_subvol,
-                          hot_subvol, hot_subvol->fops->unlink, &local->loc,
-                          local->flags, NULL);
-        return 0;
-    }
-
-    LOCK(&frame->lock);
-    {
-        if (op_errno == ENOENT) {
-            local->op_ret = 0;
-            local->op_errno = op_errno;
-        } else {
-            local->op_ret = op_ret;
-            local->op_errno = op_errno;
-        }
-        gf_msg_debug(this->name, op_errno, "Lookup : subvolume %s returned -1",
-                     prev->name);
-    }
-
-    UNLOCK(&frame->lock);
-
-    DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno,
-                     &local->preparent, &local->postparent, xdata);
-
-    return 0;
-}
-
-int
-tier_unlink_linkfile_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                         int op_ret, int op_errno, struct iatt *preparent,
-                         struct iatt *postparent, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    xlator_t *prev = NULL;
-
-    local = frame->local;
-    prev = cookie;
-
-    LOCK(&frame->lock);
-    {
-        /* Ignore EINVAL for tier to ignore error when the file
-                does not exist on the other tier  */
-        if ((op_ret == -1) && !((op_errno == ENOENT) || (op_errno == EINVAL))) {
-            local->op_errno = op_errno;
-            local->op_ret = op_ret;
-            gf_msg_debug(this->name, op_errno,
-                         "Unlink link: subvolume %s"
-                         " returned -1",
-                         prev->name);
-            goto unlock;
-        }
-
-        local->op_ret = 0;
-    }
-unlock:
-    UNLOCK(&frame->lock);
-
-    if (local->op_ret == -1)
-        goto err;
-
-    DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno,
-                     &local->preparent, &local->postparent, xdata);
-
-    return 0;
-
-err:
-    DHT_STACK_UNWIND(unlink, frame, -1, local->op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-tier_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                int op_errno, struct iatt *preparent, struct iatt *postparent,
-                dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    xlator_t *prev = NULL;
-    struct iatt *stbuf = NULL;
-    dht_conf_t *conf = NULL;
-    int ret = -1;
-    xlator_t *hot_tier = NULL;
-    xlator_t *cold_tier = NULL;
-
-    local = frame->local;
-    prev = cookie;
-    conf = this->private;
-
-    cold_tier = TIER_HASHED_SUBVOL;
-    hot_tier = TIER_UNHASHED_SUBVOL;
-
-    LOCK(&frame->lock);
-    {
-        if (op_ret == -1) {
-            if (op_errno == ENOENT) {
-                local->op_ret = 0;
-            } else {
-                local->op_ret = -1;
-                local->op_errno = op_errno;
-            }
-            gf_msg_debug(this->name, op_errno,
-                         "Unlink: subvolume %s returned -1"
-                         " with errno = %d",
-                         prev->name, op_errno);
-            goto unlock;
-        }
-
-        local->op_ret = 0;
-
-        local->postparent = *postparent;
-        local->preparent = *preparent;
-
-        if (local->loc.parent) {
-            dht_inode_ctx_time_update(local->loc.parent, this,
-                                      &local->preparent, 0);
-            dht_inode_ctx_time_update(local->loc.parent, this,
-                                      &local->postparent, 1);
-        }
-    }
-unlock:
-    UNLOCK(&frame->lock);
-
-    if (local->op_ret)
-        goto out;
-
-    if (cold_tier != local->cached_subvol) {
-        /*
-         * File is present in hot tier, so there will be
-         * a link file on cold tier, deleting the linkfile
-         * from cold tier
-         */
-        STACK_WIND_COOKIE(frame, tier_unlink_linkfile_cbk, cold_tier, cold_tier,
-                          cold_tier->fops->unlink, &local->loc, local->flags,
-                          xdata);
-        return 0;
-    }
-
-    ret = dict_get_bin(xdata, DHT_IATT_IN_XDATA_KEY, (void **)&stbuf);
-    if (!ret && stbuf &&
-        ((IS_DHT_MIGRATION_PHASE2(stbuf)) || IS_DHT_MIGRATION_PHASE1(stbuf))) {
-        /*
-         * File is migrating from cold to hot tier.
-         * Delete the destination linkfile.
-         */
-        STACK_WIND_COOKIE(frame, tier_unlink_lookup_cbk, hot_tier, hot_tier,
-                          hot_tier->fops->lookup, &local->loc, NULL);
-        return 0;
-    }
-
-out:
-    DHT_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno,
-                     &local->preparent, &local->postparent, xdata);
-
-    return 0;
-}
-
-int
-tier_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
-            dict_t *xdata)
-{
-    xlator_t *cached_subvol = NULL;
-    xlator_t *hashed_subvol = NULL;
-    dht_conf_t *conf = NULL;
-    int op_errno = -1;
-    dht_local_t *local = NULL;
-    int ret = -1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-
-    conf = this->private;
-
-    local = dht_local_init(frame, loc, NULL, GF_FOP_UNLINK);
-    if (!local) {
-        op_errno = ENOMEM;
-
-        goto err;
-    }
-
-    hashed_subvol = TIER_HASHED_SUBVOL;
-
-    cached_subvol = local->cached_subvol;
-    if (!cached_subvol) {
-        gf_msg_debug(this->name, 0, "no cached subvolume for path=%s",
-                     loc->path);
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    local->flags = xflag;
-    if (IA_ISREG(loc->inode->ia_type) && (hashed_subvol == cached_subvol)) {
-        /*
-         * File resides in cold tier. We need to stat
-         * the file to see if it is being promoted.
-         * If yes we need to delete the destination
-         * file as well.
-         *
-         * Currently we are doing this check only for
-         * regular files.
-         */
-        xdata = xdata ? dict_ref(xdata) : dict_new();
-        if (xdata) {
-            ret = dict_set_int8(xdata, DHT_IATT_IN_XDATA_KEY, 1);
-            if (ret) {
-                gf_msg_debug(this->name, 0, "Failed to set dictionary key %s",
-                             DHT_IATT_IN_XDATA_KEY);
-            }
-        }
-    }
-
-    /*
-     * File is on hot tier, delete the data file first, then
-     * linkfile from cold.
-     */
-    STACK_WIND_COOKIE(frame, tier_unlink_cbk, cached_subvol, cached_subvol,
-                      cached_subvol->fops->unlink, loc, xflag, xdata);
-    if (xdata)
-        dict_unref(xdata);
-    return 0;
-err:
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    DHT_STACK_UNWIND(unlink, frame, -1, op_errno, NULL, NULL, NULL);
-
-    return 0;
-}
-
-int
-tier_readdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                 int op_errno, gf_dirent_t *orig_entries, dict_t *xdata)
-{
-    gf_dirent_t entries;
-    gf_dirent_t *orig_entry = NULL;
-    gf_dirent_t *entry = NULL;
-    int count = 0;
-
-    INIT_LIST_HEAD(&entries.list);
-
-    if (op_ret < 0)
-        goto unwind;
-
-    list_for_each_entry(orig_entry, (&orig_entries->list), list)
-    {
-        entry = gf_dirent_for_name(orig_entry->d_name);
-        if (!entry) {
-            gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY,
-                   "Memory allocation failed ");
-            goto unwind;
-        }
-
-        entry->d_off = orig_entry->d_off;
-        entry->d_ino = orig_entry->d_ino;
-        entry->d_type = orig_entry->d_type;
-        entry->d_len = orig_entry->d_len;
-
-        list_add_tail(&entry->list, &entries.list);
-        count++;
-    }
-    op_ret = count;
-
-unwind:
-    if (op_ret < 0)
-        op_ret = 0;
-
-    DHT_STACK_UNWIND(readdir, frame, op_ret, op_errno, &entries, NULL);
-
-    gf_dirent_free(&entries);
-
-    return 0;
-}
-
-int
-tier_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                  int op_errno, gf_dirent_t *orig_entries, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    gf_dirent_t entries;
-    gf_dirent_t *orig_entry = NULL;
-    gf_dirent_t *entry = NULL;
-    xlator_t *prev = NULL;
-    xlator_t *next_subvol = NULL;
-    off_t next_offset = 0;
-    int count = 0;
-    dht_conf_t *conf = NULL;
-    int ret = 0;
-    inode_table_t *itable = NULL;
-    inode_t *inode = NULL;
-
-    INIT_LIST_HEAD(&entries.list);
-    prev = cookie;
-    local = frame->local;
-    itable = local->fd ? local->fd->inode->table : NULL;
-
-    conf = this->private;
-    GF_VALIDATE_OR_GOTO(this->name, conf, unwind);
-
-    if (op_ret < 0)
-        goto done;
-
-    list_for_each_entry(orig_entry, (&orig_entries->list), list)
-    {
-        next_offset = orig_entry->d_off;
-
-        if (IA_ISINVAL(orig_entry->d_stat.ia_type)) {
-            /*stat failed somewhere- ignore this entry*/
-            continue;
-        }
-
-        entry = gf_dirent_for_name(orig_entry->d_name);
-        if (!entry) {
-            goto unwind;
-        }
-
-        entry->d_off = orig_entry->d_off;
-        entry->d_stat = orig_entry->d_stat;
-        entry->d_ino = orig_entry->d_ino;
-        entry->d_type = orig_entry->d_type;
-        entry->d_len = orig_entry->d_len;
-
-        if (orig_entry->dict)
-            entry->dict = dict_ref(orig_entry->dict);
-
-        if (check_is_linkfile(NULL, (&orig_entry->d_stat), orig_entry->dict,
-                              conf->link_xattr_name)) {
-            goto entries;
-
-        } else if (IA_ISDIR(entry->d_stat.ia_type)) {
-            if (orig_entry->inode) {
-                dht_inode_ctx_time_update(orig_entry->inode, this,
-                                          &entry->d_stat, 1);
-            }
-        } else {
-            if (orig_entry->inode) {
-                ret = dht_layout_preset(this, prev, orig_entry->inode);
-                if (ret)
-                    gf_msg(this->name, GF_LOG_WARNING, 0,
-                           DHT_MSG_LAYOUT_SET_FAILED,
-                           "failed to link the layout "
-                           "in inode");
-
-                entry->inode = inode_ref(orig_entry->inode);
-            } else if (itable) {
-                /*
-                 * orig_entry->inode might be null if any upper
-                 * layer xlators below client set to null, to
-                 * force a lookup on the inode even if the inode
-                 * is present in the inode table. In that case
-                 * we just update the ctx to make sure we didn't
-                 * missed anything.
-                 */
-                inode = inode_find(itable, orig_entry->d_stat.ia_gfid);
-                if (inode) {
-                    ret = dht_layout_preset(this, TIER_HASHED_SUBVOL, inode);
-                    if (ret)
-                        gf_msg(this->name, GF_LOG_WARNING, 0,
-                               DHT_MSG_LAYOUT_SET_FAILED,
-                               "failed to link the layout"
-                               " in inode");
-                    inode_unref(inode);
-                    inode = NULL;
-                }
-            }
-        }
-
-    entries:
-        list_add_tail(&entry->list, &entries.list);
-        count++;
-    }
-    op_ret = count;
-
-done:
-    if (count == 0) {
-        /* non-zero next_offset means that
-           EOF is not yet hit on the current subvol
-        */
-        if (next_offset != 0) {
-            next_subvol = prev;
-        } else {
-            goto unwind;
-        }
-
-        STACK_WIND_COOKIE(frame, tier_readdirp_cbk, next_subvol, next_subvol,
-                          next_subvol->fops->readdirp, local->fd, local->size,
-                          next_offset, local->xattr);
-        return 0;
-    }
-
-unwind:
-    if (op_ret < 0)
-        op_ret = 0;
-
-    DHT_STACK_UNWIND(readdirp, frame, op_ret, op_errno, &entries, NULL);
-
-    gf_dirent_free(&entries);
-
-    return 0;
-}
-
-int
-tier_do_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-                off_t yoff, int whichop, dict_t *dict)
-{
-    dht_local_t *local = NULL;
-    int op_errno = -1;
-    xlator_t *hashed_subvol = NULL;
-    int ret = 0;
-    dht_conf_t *conf = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(this->private, err);
-
-    conf = this->private;
-
-    local = dht_local_init(frame, NULL, NULL, whichop);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    local->fd = fd_ref(fd);
-    local->size = size;
-    local->xattr_req = (dict) ? dict_ref(dict) : NULL;
-
-    hashed_subvol = TIER_HASHED_SUBVOL;
-
-    /* TODO: do proper readdir */
-    if (whichop == GF_FOP_READDIRP) {
-        if (dict)
-            local->xattr = dict_ref(dict);
-        else
-            local->xattr = dict_new();
-
-        if (local->xattr) {
-            ret = dict_set_uint32(local->xattr, conf->link_xattr_name, 256);
-            if (ret)
-                gf_msg(this->name, GF_LOG_WARNING, 0, DHT_MSG_DICT_SET_FAILED,
-                       "Failed to set dictionary value"
-                       " : key = %s",
-                       conf->link_xattr_name);
-        }
-
-        STACK_WIND_COOKIE(frame, tier_readdirp_cbk, hashed_subvol,
-                          hashed_subvol, hashed_subvol->fops->readdirp, fd,
-                          size, yoff, local->xattr);
-
-    } else {
-        STACK_WIND_COOKIE(frame, tier_readdir_cbk, hashed_subvol, hashed_subvol,
-                          hashed_subvol->fops->readdir, fd, size, yoff,
-                          local->xattr);
-    }
-
-    return 0;
-
-err:
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    DHT_STACK_UNWIND(readdir, frame, -1, op_errno, NULL, NULL);
-
-    return 0;
-}
-
-int
-tier_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-             off_t yoff, dict_t *xdata)
-{
-    int op = GF_FOP_READDIR;
-    dht_conf_t *conf = NULL;
-    int i = 0;
-
-    conf = this->private;
-    if (!conf)
-        goto out;
-
-    for (i = 0; i < conf->subvolume_cnt; i++) {
-        if (!conf->subvolume_status[i]) {
-            op = GF_FOP_READDIRP;
-            break;
-        }
-    }
-
-    if (conf->use_readdirp)
-        op = GF_FOP_READDIRP;
-
-out:
-    tier_do_readdir(frame, this, fd, size, yoff, op, 0);
-    return 0;
-}
-
-int
-tier_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-              off_t yoff, dict_t *dict)
-{
-    tier_do_readdir(frame, this, fd, size, yoff, GF_FOP_READDIRP, dict);
-    return 0;
-}
-
-int
-tier_statfs_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                int op_errno, struct statvfs *statvfs, dict_t *xdata)
-{
-    gf_boolean_t event = _gf_false;
-    qdstatfs_action_t action = qdstatfs_action_OFF;
-    dht_local_t *local = NULL;
-    int this_call_cnt = 0;
-    int bsize = 0;
-    int frsize = 0;
-    GF_UNUSED int ret = 0;
-    unsigned long new_usage = 0;
-    unsigned long cur_usage = 0;
-    xlator_t *prev = NULL;
-    dht_conf_t *conf = NULL;
-    tier_statvfs_t *tier_stat = NULL;
-
-    prev = cookie;
-    local = frame->local;
-    GF_ASSERT(local);
-
-    conf = this->private;
-
-    if (xdata)
-        ret = dict_get_int8(xdata, "quota-deem-statfs", (int8_t *)&event);
-
-    tier_stat = &local->tier_statvfs;
-
-    LOCK(&frame->lock);
-    {
-        if (op_ret == -1) {
-            local->op_errno = op_errno;
-            goto unlock;
-        }
-        if (!statvfs) {
-            op_errno = EINVAL;
-            local->op_ret = -1;
-            goto unlock;
-        }
-        local->op_ret = 0;
-
-        if (local->quota_deem_statfs) {
-            if (event == _gf_true) {
-                action = qdstatfs_action_COMPARE;
-            } else {
-                action = qdstatfs_action_NEGLECT;
-            }
-        } else {
-            if (event == _gf_true) {
-                action = qdstatfs_action_REPLACE;
-                local->quota_deem_statfs = _gf_true;
-            }
-        }
-
-        if (local->quota_deem_statfs) {
-            switch (action) {
-                case qdstatfs_action_NEGLECT:
-                    goto unlock;
-
-                case qdstatfs_action_REPLACE:
-                    local->statvfs = *statvfs;
-                    goto unlock;
-
-                case qdstatfs_action_COMPARE:
-                    new_usage = statvfs->f_blocks - statvfs->f_bfree;
-                    cur_usage = local->statvfs.f_blocks -
-                                local->statvfs.f_bfree;
-
-                    /* Take the max of the usage from subvols */
-                    if (new_usage >= cur_usage)
-                        local->statvfs = *statvfs;
-                    goto unlock;
-
-                default:
-                    break;
-            }
-        }
-
-        if (local->statvfs.f_bsize != 0) {
-            bsize = max(local->statvfs.f_bsize, statvfs->f_bsize);
-            frsize = max(local->statvfs.f_frsize, statvfs->f_frsize);
-            dht_normalize_stats(&local->statvfs, bsize, frsize);
-            dht_normalize_stats(statvfs, bsize, frsize);
-        } else {
-            local->statvfs.f_bsize = statvfs->f_bsize;
-            local->statvfs.f_frsize = statvfs->f_frsize;
-        }
-
-        if (prev == TIER_HASHED_SUBVOL) {
-            local->statvfs.f_blocks = statvfs->f_blocks;
-            local->statvfs.f_files = statvfs->f_files;
-            local->statvfs.f_fsid = statvfs->f_fsid;
-            local->statvfs.f_flag = statvfs->f_flag;
-            local->statvfs.f_namemax = statvfs->f_namemax;
-            tier_stat->blocks_used = (statvfs->f_blocks - statvfs->f_bfree);
-            tier_stat->pblocks_used = (statvfs->f_blocks - statvfs->f_bavail);
-            tier_stat->files_used = (statvfs->f_files - statvfs->f_ffree);
-            tier_stat->pfiles_used = (statvfs->f_files - statvfs->f_favail);
-            tier_stat->hashed_fsid = statvfs->f_fsid;
-        } else {
-            tier_stat->unhashed_fsid = statvfs->f_fsid;
-            tier_stat->unhashed_blocks_used = (statvfs->f_blocks -
-                                               statvfs->f_bfree);
-            tier_stat->unhashed_pblocks_used = (statvfs->f_blocks -
-                                                statvfs->f_bavail);
-            tier_stat->unhashed_files_used = (statvfs->f_files -
-                                              statvfs->f_ffree);
-            tier_stat->unhashed_pfiles_used = (statvfs->f_files -
-                                               statvfs->f_favail);
-        }
-    }
-unlock:
-    UNLOCK(&frame->lock);
-
-    this_call_cnt = dht_frame_return(frame);
-    if (is_last_call(this_call_cnt)) {
-        if (tier_stat->unhashed_fsid != tier_stat->hashed_fsid) {
-            tier_stat->blocks_used += tier_stat->unhashed_blocks_used;
-            tier_stat->pblocks_used += tier_stat->unhashed_pblocks_used;
-            tier_stat->files_used += tier_stat->unhashed_files_used;
-            tier_stat->pfiles_used += tier_stat->unhashed_pfiles_used;
-        }
-        local->statvfs.f_bfree = local->statvfs.f_blocks -
-                                 tier_stat->blocks_used;
-        local->statvfs.f_bavail = local->statvfs.f_blocks -
-                                  tier_stat->pblocks_used;
-        local->statvfs.f_ffree = local->statvfs.f_files - tier_stat->files_used;
-        local->statvfs.f_favail = local->statvfs.f_files -
-                                  tier_stat->pfiles_used;
-        DHT_STACK_UNWIND(statfs, frame, local->op_ret, local->op_errno,
-                         &local->statvfs, xdata);
-    }
-
-    return 0;
-}
-
-int
-tier_statfs(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-    dht_local_t *local = NULL;
-    dht_conf_t *conf = NULL;
-    int op_errno = -1;
-    int i = -1;
-    inode_t *inode = NULL;
-    inode_table_t *itable = NULL;
-    uuid_t root_gfid = {
-        0,
-    };
-    loc_t newloc = {
-        0,
-    };
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(this->private, err);
-
-    conf = this->private;
-
-    local = dht_local_init(frame, NULL, NULL, GF_FOP_STATFS);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    if (loc->inode && !IA_ISDIR(loc->inode->ia_type)) {
-        itable = loc->inode->table;
-        if (!itable) {
-            op_errno = EINVAL;
-            goto err;
-        }
-
-        loc = &local->loc2;
-        root_gfid[15] = 1;
-
-        inode = inode_find(itable, root_gfid);
-        if (!inode) {
-            op_errno = EINVAL;
-            goto err;
-        }
-
-        dht_build_root_loc(inode, &newloc);
-        loc = &newloc;
-    }
-
-    local->call_cnt = conf->subvolume_cnt;
-
-    for (i = 0; i < conf->subvolume_cnt; i++) {
-        STACK_WIND_COOKIE(frame, tier_statfs_cbk, conf->subvolumes[i],
-                          conf->subvolumes[i],
-                          conf->subvolumes[i]->fops->statfs, loc, xdata);
-    }
-
-    return 0;
-
-err:
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    DHT_STACK_UNWIND(statfs, frame, -1, op_errno, NULL, NULL);
-
-    return 0;
-}
diff --git a/xlators/cluster/dht/src/tier-common.h b/xlators/cluster/dht/src/tier-common.h
deleted file mode 100644
index b1ebaa8004d..00000000000
--- a/xlators/cluster/dht/src/tier-common.h
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
-  Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef _TIER_COMMON_H_
-#define _TIER_COMMON_H_
-/* Function definitions */
-int
-tier_create_unlink_stale_linkto_cbk(call_frame_t *frame, void *cookie,
-                                    xlator_t *this, int op_ret, int op_errno,
-                                    struct iatt *preparent,
-                                    struct iatt *postparent, dict_t *xdata);
-
-int
-tier_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
-                int op_errno, fd_t *fd, inode_t *inode, struct iatt *stbuf,
-                struct iatt *preparent, struct iatt *postparent, dict_t *xdata);
-
-int
-tier_create_linkfile_create_cbk(call_frame_t *frame, void *cookie,
-                                xlator_t *this, int32_t op_ret,
-                                int32_t op_errno, inode_t *inode,
-                                struct iatt *stbuf, struct iatt *preparent,
-                                struct iatt *postparent, dict_t *xdata);
-
-int
-tier_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-            mode_t mode, mode_t umask, fd_t *fd, dict_t *params);
-
-int32_t
-tier_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
-            dict_t *xdata);
-
-int32_t
-tier_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-              off_t off, dict_t *dict);
-
-int
-tier_readdir(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-             off_t yoff, dict_t *xdata);
-
-int
-tier_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
-          dict_t *xdata);
-
-int
-tier_statfs(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata);
-
-#endif
diff --git a/xlators/cluster/dht/src/tier.c b/xlators/cluster/dht/src/tier.c
deleted file mode 100644
index a8cccaf019e..00000000000
--- a/xlators/cluster/dht/src/tier.c
+++ /dev/null
@@ -1,3090 +0,0 @@
-/*
-  Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#include <dlfcn.h>
-
-#include "dht-common.h"
-#include "tier.h"
-#include "tier-common.h"
-#include <glusterfs/syscall.h>
-#include <glusterfs/events.h>
-#include "tier-ctr-interface.h"
-
-/*Hard coded DB info*/
-static gfdb_db_type_t dht_tier_db_type = GFDB_SQLITE3;
-/*Hard coded DB info*/
-
-/*Mutex for updating the data movement stats*/
-static pthread_mutex_t dm_stat_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-/* Stores the path location of promotion query files */
-static char *promotion_qfile;
-/* Stores the path location of demotion query files */
-static char *demotion_qfile;
-
-static void *libhandle;
-static gfdb_methods_t gfdb_methods;
-
-#define DB_QUERY_RECORD_SIZE 4096
-
-/*
- * Closes all the fds and frees the qfile_array
- * */
-static void
-qfile_array_free(tier_qfile_array_t *qfile_array)
-{
-    ssize_t i = 0;
-
-    if (qfile_array) {
-        if (qfile_array->fd_array) {
-            for (i = 0; i < qfile_array->array_size; i++) {
-                if (qfile_array->fd_array[i] != -1) {
-                    sys_close(qfile_array->fd_array[i]);
-                }
-            }
-        }
-        GF_FREE(qfile_array->fd_array);
-    }
-    GF_FREE(qfile_array);
-}
-
-/* Create a new query file list with given size */
-static tier_qfile_array_t *
-qfile_array_new(ssize_t array_size)
-{
-    int ret = -1;
-    tier_qfile_array_t *qfile_array = NULL;
-    ssize_t i = 0;
-
-    GF_VALIDATE_OR_GOTO("tier", (array_size > 0), out);
-
-    qfile_array = GF_CALLOC(1, sizeof(tier_qfile_array_t),
-                            gf_tier_mt_qfile_array_t);
-    if (!qfile_array) {
-        gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to allocate memory for tier_qfile_array_t");
-        goto out;
-    }
-
-    qfile_array->fd_array = GF_MALLOC(array_size * sizeof(int),
-                                      gf_dht_mt_int32_t);
-    if (!qfile_array->fd_array) {
-        gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to allocate memory for "
-               "tier_qfile_array_t->fd_array");
-        goto out;
-    }
-
-    /* Init all the fds to -1 */
-    for (i = 0; i < array_size; i++) {
-        qfile_array->fd_array[i] = -1;
-    }
-
-    qfile_array->array_size = array_size;
-    qfile_array->next_index = 0;
-
-    /* Set exhausted count to list size as the list is empty */
-    qfile_array->exhausted_count = qfile_array->array_size;
-
-    ret = 0;
-out:
-    if (ret) {
-        qfile_array_free(qfile_array);
-        qfile_array = NULL;
-    }
-    return qfile_array;
-}
-
-/* Checks if the query file list is empty or totally exhausted. */
-static gf_boolean_t
-is_qfile_array_empty(tier_qfile_array_t *qfile_array)
-{
-    return (qfile_array->exhausted_count == qfile_array->array_size)
-               ? _gf_true
-               : _gf_false;
-}
-
-/* Shifts the next_fd pointer to the next available fd in the list */
-static void
-shift_next_index(tier_qfile_array_t *qfile_array)
-{
-    int qfile_fd = 0;
-    int spin_count = 0;
-
-    if (is_qfile_array_empty(qfile_array)) {
-        return;
-    }
-
-    do {
-        /* change next_index in a rotional manner */
-        (qfile_array->next_index == (qfile_array->array_size - 1))
-            ? qfile_array->next_index = 0
-            : qfile_array->next_index++;
-
-        qfile_fd = (qfile_array->fd_array[qfile_array->next_index]);
-
-        spin_count++;
-
-    } while ((qfile_fd == -1) && (spin_count < qfile_array->array_size));
-}
-
-/*
- * This is a non-thread safe function to read query records
- * from a list of query files in a Round-Robin manner.
- * As in when the query files get exhuasted they are closed.
- * Returns:
- * 0   if all the query records in all the query files of the list are
- *     exhausted.
- * > 0 if a query record is successfully read. Indicates the size of the query
- *     record read.
- * < 0  if there was failure
- * */
-static int
-read_query_record_list(tier_qfile_array_t *qfile_array,
-                       gfdb_query_record_t **query_record)
-{
-    int ret = -1;
-    int qfile_fd = 0;
-
-    GF_VALIDATE_OR_GOTO("tier", qfile_array, out);
-    GF_VALIDATE_OR_GOTO("tier", qfile_array->fd_array, out);
-
-    do {
-        if (is_qfile_array_empty(qfile_array)) {
-            ret = 0;
-            break;
-        }
-
-        qfile_fd = qfile_array->fd_array[qfile_array->next_index];
-        ret = gfdb_methods.gfdb_read_query_record(qfile_fd, query_record);
-        if (ret <= 0) {
-            /*The qfile_fd has reached EOF or
-             * there was an error.
-             * 1. Close the exhausted fd
-             * 2. increment the exhausted count
-             * 3. shift next_qfile to next qfile
-             **/
-            sys_close(qfile_fd);
-            qfile_array->fd_array[qfile_array->next_index] = -1;
-            qfile_array->exhausted_count++;
-            /* shift next_qfile to next qfile */
-            shift_next_index(qfile_array);
-            continue;
-        } else {
-            /* shift next_qfile to next qfile */
-            shift_next_index(qfile_array);
-            break;
-        }
-    } while (1);
-out:
-    return ret;
-}
-
-/* Check and update the watermark every WM_INTERVAL seconds */
-#define WM_INTERVAL 5
-#define WM_INTERVAL_EMERG 1
-
-static int
-tier_check_same_node(xlator_t *this, loc_t *loc, gf_defrag_info_t *defrag)
-{
-    int ret = -1;
-    dict_t *dict = NULL;
-    char *uuid_str = NULL;
-    uuid_t node_uuid = {
-        0,
-    };
-
-    GF_VALIDATE_OR_GOTO("tier", this, out);
-    GF_VALIDATE_OR_GOTO(this->name, loc, out);
-    GF_VALIDATE_OR_GOTO(this->name, defrag, out);
-
-    if (syncop_getxattr(this, loc, &dict, GF_XATTR_NODE_UUID_KEY, NULL, NULL)) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Unable to get NODE_UUID_KEY %s %s\n", loc->name, loc->path);
-        goto out;
-    }
-
-    if (dict_get_str(dict, GF_XATTR_NODE_UUID_KEY, &uuid_str) < 0) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to get node-uuids for %s", loc->path);
-        goto out;
-    }
-
-    if (gf_uuid_parse(uuid_str, node_uuid)) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "uuid_parse failed for %s", loc->path);
-        goto out;
-    }
-
-    if (gf_uuid_compare(node_uuid, defrag->node_uuid)) {
-        gf_msg_debug(this->name, 0, "%s does not belong to this node",
-                     loc->path);
-        ret = 1;
-        goto out;
-    }
-
-    ret = 0;
-out:
-    if (dict)
-        dict_unref(dict);
-
-    return ret;
-}
-
-int
-tier_get_fs_stat(xlator_t *this, loc_t *root_loc)
-{
-    int ret = 0;
-    gf_defrag_info_t *defrag = NULL;
-    dht_conf_t *conf = NULL;
-    dict_t *xdata = NULL;
-    struct statvfs statfs = {
-        0,
-    };
-    gf_tier_conf_t *tier_conf = NULL;
-
-    conf = this->private;
-    if (!conf) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_STATUS,
-               "conf is NULL");
-        ret = -1;
-        goto exit;
-    }
-
-    defrag = conf->defrag;
-    if (!defrag) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_STATUS,
-               "defrag is NULL");
-        ret = -1;
-        goto exit;
-    }
-
-    tier_conf = &defrag->tier_conf;
-
-    xdata = dict_new();
-    if (!xdata) {
-        gf_msg(this->name, GF_LOG_ERROR, ENOMEM, DHT_MSG_NO_MEMORY,
-               "failed to allocate dictionary");
-        ret = -1;
-        goto exit;
-    }
-
-    ret = dict_set_int8(xdata, GF_INTERNAL_IGNORE_DEEM_STATFS, 1);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_DICT_SET_FAILED,
-               "Failed to set " GF_INTERNAL_IGNORE_DEEM_STATFS " in dict");
-        ret = -1;
-        goto exit;
-    }
-
-    /* Find how much free space is on the hot subvolume.
-     * Then see if that value */
-    /* is less than or greater than user defined watermarks.
-     * Stash results in */
-    /* the tier_conf data structure. */
-
-    ret = syncop_statfs(conf->subvolumes[1], root_loc, &statfs, xdata, NULL);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, -ret, DHT_MSG_LOG_TIER_STATUS,
-               "Unable to obtain statfs.");
-        goto exit;
-    }
-
-    pthread_mutex_lock(&dm_stat_mutex);
-
-    tier_conf->block_size = statfs.f_bsize;
-    tier_conf->blocks_total = statfs.f_blocks;
-    tier_conf->blocks_used = statfs.f_blocks - statfs.f_bfree;
-
-    tier_conf->percent_full = GF_PERCENTAGE(tier_conf->blocks_used,
-                                            statfs.f_blocks);
-    pthread_mutex_unlock(&dm_stat_mutex);
-
-exit:
-    if (xdata)
-        dict_unref(xdata);
-    return ret;
-}
-
-static void
-tier_send_watermark_event(const char *volname, tier_watermark_op_t old_wm,
-                          tier_watermark_op_t new_wm)
-{
-    if (old_wm == TIER_WM_LOW || old_wm == TIER_WM_NONE) {
-        if (new_wm == TIER_WM_MID) {
-            gf_event(EVENT_TIER_WATERMARK_RAISED_TO_MID, "vol=%s", volname);
-        } else if (new_wm == TIER_WM_HI) {
-            gf_event(EVENT_TIER_WATERMARK_HI, "vol=%s", volname);
-        }
-    } else if (old_wm == TIER_WM_MID) {
-        if (new_wm == TIER_WM_LOW) {
-            gf_event(EVENT_TIER_WATERMARK_DROPPED_TO_LOW, "vol=%s", volname);
-        } else if (new_wm == TIER_WM_HI) {
-            gf_event(EVENT_TIER_WATERMARK_HI, "vol=%s", volname);
-        }
-    } else if (old_wm == TIER_WM_HI) {
-        if (new_wm == TIER_WM_MID) {
-            gf_event(EVENT_TIER_WATERMARK_DROPPED_TO_MID, "vol=%s", volname);
-        } else if (new_wm == TIER_WM_LOW) {
-            gf_event(EVENT_TIER_WATERMARK_DROPPED_TO_LOW, "vol=%s", volname);
-        }
-    }
-}
-
-int
-tier_check_watermark(xlator_t *this)
-{
-    int ret = -1;
-    gf_defrag_info_t *defrag = NULL;
-    dht_conf_t *conf = NULL;
-    gf_tier_conf_t *tier_conf = NULL;
-    tier_watermark_op_t wm = TIER_WM_NONE;
-
-    conf = this->private;
-    if (!conf)
-        goto exit;
-
-    defrag = conf->defrag;
-    if (!defrag)
-        goto exit;
-
-    tier_conf = &defrag->tier_conf;
-
-    if (tier_conf->percent_full < tier_conf->watermark_low) {
-        wm = TIER_WM_LOW;
-
-    } else if (tier_conf->percent_full < tier_conf->watermark_hi) {
-        wm = TIER_WM_MID;
-
-    } else {
-        wm = TIER_WM_HI;
-    }
-
-    if (wm != tier_conf->watermark_last) {
-        tier_send_watermark_event(tier_conf->volname, tier_conf->watermark_last,
-                                  wm);
-
-        tier_conf->watermark_last = wm;
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Tier watermark now %d", wm);
-    }
-
-    ret = 0;
-
-exit:
-    return ret;
-}
-
-static gf_boolean_t
-is_hot_tier_full(gf_tier_conf_t *tier_conf)
-{
-    if (tier_conf && (tier_conf->mode == TIER_MODE_WM) &&
-        (tier_conf->watermark_last == TIER_WM_HI))
-        return _gf_true;
-
-    return _gf_false;
-}
-
-int
-tier_do_migration(xlator_t *this, int promote)
-{
-    gf_defrag_info_t *defrag = NULL;
-    dht_conf_t *conf = NULL;
-    long rand = 0;
-    int migrate = 0;
-    gf_tier_conf_t *tier_conf = NULL;
-
-    conf = this->private;
-    if (!conf)
-        goto exit;
-
-    defrag = conf->defrag;
-    if (!defrag)
-        goto exit;
-
-    if (tier_check_watermark(this) != 0) {
-        gf_msg(this->name, GF_LOG_CRITICAL, errno, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to get watermark");
-        goto exit;
-    }
-
-    tier_conf = &defrag->tier_conf;
-
-    switch (tier_conf->watermark_last) {
-        case TIER_WM_LOW:
-            migrate = promote ? 1 : 0;
-            break;
-        case TIER_WM_HI:
-            migrate = promote ? 0 : 1;
-            break;
-        case TIER_WM_MID:
-            /* coverity[DC.WEAK_CRYPTO] */
-            rand = random() % 100;
-            if (promote) {
-                migrate = (rand > tier_conf->percent_full);
-            } else {
-                migrate = (rand <= tier_conf->percent_full);
-            }
-            break;
-    }
-
-exit:
-    return migrate;
-}
-
-int
-tier_migrate(xlator_t *this, int is_promotion, dict_t *migrate_data, loc_t *loc,
-             gf_tier_conf_t *tier_conf)
-{
-    int ret = -1;
-
-    pthread_mutex_lock(&tier_conf->pause_mutex);
-    if (is_promotion)
-        tier_conf->promote_in_progress = 1;
-    else
-        tier_conf->demote_in_progress = 1;
-    pthread_mutex_unlock(&tier_conf->pause_mutex);
-
-    /* Data migration */
-    ret = syncop_setxattr(this, loc, migrate_data, 0, NULL, NULL);
-
-    pthread_mutex_lock(&tier_conf->pause_mutex);
-    if (is_promotion)
-        tier_conf->promote_in_progress = 0;
-    else
-        tier_conf->demote_in_progress = 0;
-    pthread_mutex_unlock(&tier_conf->pause_mutex);
-
-    return ret;
-}
-
-/* returns  _gf_true: if file can be promoted
- * returns _gf_false: if file cannot be promoted
- */
-static gf_boolean_t
-tier_can_promote_file(xlator_t *this, char const *file_name,
-                      struct iatt *current, gf_defrag_info_t *defrag)
-{
-    gf_boolean_t ret = _gf_false;
-    fsblkcnt_t estimated_usage = 0;
-
-    if (defrag->tier_conf.tier_max_promote_size &&
-        (current->ia_size > defrag->tier_conf.tier_max_promote_size)) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "File %s (gfid:%s) with size (%" PRIu64
-               ") exceeds maxsize "
-               "(%d) for promotion. File will not be promoted.",
-               file_name, uuid_utoa(current->ia_gfid), current->ia_size,
-               defrag->tier_conf.tier_max_promote_size);
-        goto err;
-    }
-
-    /* bypass further validations for TEST mode */
-    if (defrag->tier_conf.mode != TIER_MODE_WM) {
-        ret = _gf_true;
-        goto err;
-    }
-
-    /* convert the file size to blocks as per the block size of the
-     * destination tier
-     * NOTE: add (block_size - 1) to get the correct block size when
-     *       there is a remainder after a modulo
-     */
-    estimated_usage = ((current->ia_size + defrag->tier_conf.block_size - 1) /
-                       defrag->tier_conf.block_size) +
-                      defrag->tier_conf.blocks_used;
-
-    /* test if the estimated block usage goes above HI watermark */
-    if (GF_PERCENTAGE(estimated_usage, defrag->tier_conf.blocks_total) >=
-        defrag->tier_conf.watermark_hi) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Estimated block count consumption on "
-               "hot tier (%" PRIu64
-               ") exceeds hi watermark (%d%%). "
-               "File will not be promoted.",
-               estimated_usage, defrag->tier_conf.watermark_hi);
-        goto err;
-    }
-    ret = _gf_true;
-err:
-    return ret;
-}
-
-static int
-tier_set_migrate_data(dict_t *migrate_data)
-{
-    int failed = 1;
-
-    failed = dict_set_str(migrate_data, GF_XATTR_FILE_MIGRATE_KEY, "force");
-    if (failed) {
-        goto bail_out;
-    }
-
-    /* Flag to suggest the xattr call is from migrator */
-    failed = dict_set_str(migrate_data, "from.migrator", "yes");
-    if (failed) {
-        goto bail_out;
-    }
-
-    /* Flag to suggest its a tiering migration
-     * The reason for this dic key-value is that
-     * promotions and demotions are multithreaded
-     * so the original frame from gf_defrag_start()
-     * is not carried. A new frame will be created when
-     * we do syncop_setxattr(). This does not have the
-     * frame->root->pid of the original frame. So we pass
-     * this dic key-value when we do syncop_setxattr() to do
-     * data migration and set the frame->root->pid to
-     * GF_CLIENT_PID_TIER_DEFRAG in dht_setxattr() just before
-     * calling dht_start_rebalance_task() */
-    failed = dict_set_str(migrate_data, TIERING_MIGRATION_KEY, "yes");
-    if (failed) {
-        goto bail_out;
-    }
-
-    failed = 0;
-
-bail_out:
-    return failed;
-}
-
-static char *
-tier_get_parent_path(xlator_t *this, loc_t *p_loc, struct iatt *par_stbuf,
-                     int *per_link_status)
-{
-    int ret = -1;
-    char *parent_path = NULL;
-    dict_t *xdata_request = NULL;
-    dict_t *xdata_response = NULL;
-
-    xdata_request = dict_new();
-    if (!xdata_request) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to create xdata_request dict");
-        goto err;
-    }
-    ret = dict_set_int32(xdata_request, GET_ANCESTRY_PATH_KEY, 42);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to set value to dict : key %s \n",
-               GET_ANCESTRY_PATH_KEY);
-        goto err;
-    }
-
-    ret = syncop_lookup(this, p_loc, par_stbuf, NULL, xdata_request,
-                        &xdata_response);
-    /* When the parent gfid is a stale entry, the lookup
-     * will fail and stop the demotion process.
-     * The parent gfid can be stale when a huge folder is
-     * deleted while the files within it are being migrated
-     */
-    if (ret == -ESTALE) {
-        gf_msg(this->name, GF_LOG_WARNING, -ret, DHT_MSG_STALE_LOOKUP,
-               "Stale entry in parent lookup for %s", uuid_utoa(p_loc->gfid));
-        *per_link_status = 1;
-        goto err;
-    } else if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, -ret, DHT_MSG_LOG_TIER_ERROR,
-               "Error in parent lookup for %s", uuid_utoa(p_loc->gfid));
-        *per_link_status = -1;
-        goto err;
-    }
-    ret = dict_get_str(xdata_response, GET_ANCESTRY_PATH_KEY, &parent_path);
-    if (ret || !parent_path) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to get parent path for %s", uuid_utoa(p_loc->gfid));
-        *per_link_status = -1;
-        goto err;
-    }
-
-err:
-    if (xdata_request) {
-        dict_unref(xdata_request);
-    }
-
-    if (xdata_response) {
-        dict_unref(xdata_response);
-        xdata_response = NULL;
-    }
-
-    return parent_path;
-}
-
-static int
-tier_get_file_name_and_path(xlator_t *this, uuid_t gfid,
-                            gfdb_link_info_t *link_info,
-                            char const *parent_path, loc_t *loc,
-                            int *per_link_status)
-{
-    int ret = -1;
-
-    loc->name = gf_strdup(link_info->file_name);
-    if (!loc->name) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Memory "
-               "allocation failed for %s",
-               uuid_utoa(gfid));
-        *per_link_status = -1;
-        goto err;
-    }
-    ret = gf_asprintf((char **)&(loc->path), "%s/%s", parent_path, loc->name);
-    if (ret < 0) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to "
-               "construct file path for %s %s\n",
-               parent_path, loc->name);
-        *per_link_status = -1;
-        goto err;
-    }
-
-    ret = 0;
-
-err:
-    return ret;
-}
-
-static int
-tier_lookup_file(xlator_t *this, loc_t *p_loc, loc_t *loc, struct iatt *current,
-                 int *per_link_status)
-{
-    int ret = -1;
-
-    ret = syncop_lookup(this, loc, current, NULL, NULL, NULL);
-
-    /* The file may be deleted even when the parent
-     * is available and the lookup will
-     * return a stale entry which would stop the
-     * migration. so if its a stale entry, then skip
-     * the file and keep migrating.
-     */
-    if (ret == -ESTALE) {
-        gf_msg(this->name, GF_LOG_WARNING, -ret, DHT_MSG_STALE_LOOKUP,
-               "Stale lookup for %s", uuid_utoa(p_loc->gfid));
-        *per_link_status = 1;
-        goto err;
-    } else if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, -ret, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to "
-               "lookup file %s\n",
-               loc->name);
-        *per_link_status = -1;
-        goto err;
-    }
-    ret = 0;
-
-err:
-    return ret;
-}
-
-static gf_boolean_t
-tier_is_file_already_at_destination(xlator_t *src_subvol,
-                                    query_cbk_args_t *query_cbk_args,
-                                    dht_conf_t *conf, int *per_link_status)
-{
-    gf_boolean_t at_destination = _gf_true;
-
-    if (src_subvol == NULL) {
-        *per_link_status = 1;
-        goto err;
-    }
-    if (query_cbk_args->is_promotion && src_subvol == conf->subvolumes[1]) {
-        *per_link_status = 1;
-        goto err;
-    }
-
-    if (!query_cbk_args->is_promotion && src_subvol == conf->subvolumes[0]) {
-        *per_link_status = 1;
-        goto err;
-    }
-    at_destination = _gf_false;
-
-err:
-    return at_destination;
-}
-
-static void
-tier_update_migration_counters(query_cbk_args_t *query_cbk_args,
-                               gf_defrag_info_t *defrag,
-                               uint64_t *total_migrated_bytes, int *total_files)
-{
-    if (query_cbk_args->is_promotion) {
-        defrag->total_files_promoted++;
-        *total_migrated_bytes += defrag->tier_conf.st_last_promoted_size;
-        pthread_mutex_lock(&dm_stat_mutex);
-        defrag->tier_conf.blocks_used += defrag->tier_conf
-                                             .st_last_promoted_size;
-        pthread_mutex_unlock(&dm_stat_mutex);
-    } else {
-        defrag->total_files_demoted++;
-        *total_migrated_bytes += defrag->tier_conf.st_last_demoted_size;
-        pthread_mutex_lock(&dm_stat_mutex);
-        defrag->tier_conf.blocks_used -= defrag->tier_conf.st_last_demoted_size;
-        pthread_mutex_unlock(&dm_stat_mutex);
-    }
-    if (defrag->tier_conf.blocks_total) {
-        pthread_mutex_lock(&dm_stat_mutex);
-        defrag->tier_conf.percent_full = GF_PERCENTAGE(
-            defrag->tier_conf.blocks_used, defrag->tier_conf.blocks_total);
-        pthread_mutex_unlock(&dm_stat_mutex);
-    }
-
-    (*total_files)++;
-}
-
-static int
-tier_migrate_link(xlator_t *this, dht_conf_t *conf, uuid_t gfid,
-                  gfdb_link_info_t *link_info, gf_defrag_info_t *defrag,
-                  query_cbk_args_t *query_cbk_args, dict_t *migrate_data,
-                  int *per_link_status, int *total_files,
-                  uint64_t *total_migrated_bytes)
-{
-    int ret = -1;
-    struct iatt current = {
-        0,
-    };
-    struct iatt par_stbuf = {
-        0,
-    };
-    loc_t p_loc = {
-        0,
-    };
-    loc_t loc = {
-        0,
-    };
-    xlator_t *src_subvol = NULL;
-    inode_t *linked_inode = NULL;
-    char *parent_path = NULL;
-
-    /* Lookup for parent and get the path of parent */
-    gf_uuid_copy(p_loc.gfid, link_info->pargfid);
-    p_loc.inode = inode_new(defrag->root_inode->table);
-    if (!p_loc.inode) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to create reference to inode"
-               " for %s",
-               uuid_utoa(p_loc.gfid));
-
-        *per_link_status = -1;
-        goto err;
-    }
-
-    parent_path = tier_get_parent_path(this, &p_loc, &par_stbuf,
-                                       per_link_status);
-    if (!parent_path) {
-        goto err;
-    }
-
-    linked_inode = inode_link(p_loc.inode, NULL, NULL, &par_stbuf);
-    inode_unref(p_loc.inode);
-    p_loc.inode = linked_inode;
-
-    /* Preparing File Inode */
-    gf_uuid_copy(loc.gfid, gfid);
-    loc.inode = inode_new(defrag->root_inode->table);
-    gf_uuid_copy(loc.pargfid, link_info->pargfid);
-    loc.parent = inode_ref(p_loc.inode);
-
-    /* Get filename and Construct file path */
-    if (tier_get_file_name_and_path(this, gfid, link_info, parent_path, &loc,
-                                    per_link_status) != 0) {
-        goto err;
-    }
-    gf_uuid_copy(loc.parent->gfid, link_info->pargfid);
-
-    /* lookup file inode */
-    if (tier_lookup_file(this, &p_loc, &loc, &current, per_link_status) != 0) {
-        goto err;
-    }
-
-    if (query_cbk_args->is_promotion) {
-        if (!tier_can_promote_file(this, link_info->file_name, &current,
-                                   defrag)) {
-            *per_link_status = 1;
-            goto err;
-        }
-    }
-
-    linked_inode = inode_link(loc.inode, NULL, NULL, &current);
-    inode_unref(loc.inode);
-    loc.inode = linked_inode;
-
-    /*
-     * Do not promote/demote if file already is where it
-     * should be. It means another brick moved the file
-     * so is not an error. So we set per_link_status = 1
-     * so that we ignore counting this.
-     */
-    src_subvol = dht_subvol_get_cached(this, loc.inode);
-
-    if (tier_is_file_already_at_destination(src_subvol, query_cbk_args, conf,
-                                            per_link_status)) {
-        goto err;
-    }
-
-    gf_msg_debug(this->name, 0, "Tier %s: src_subvol %s file %s",
-                 (query_cbk_args->is_promotion ? "promote" : "demote"),
-                 src_subvol->name, loc.path);
-
-    ret = tier_check_same_node(this, &loc, defrag);
-    if (ret != 0) {
-        if (ret < 0) {
-            *per_link_status = -1;
-            goto err;
-        }
-        ret = 0;
-        /* By setting per_link_status to 1 we are
-         * ignoring this status and will not be counting
-         * this file for migration */
-        *per_link_status = 1;
-        goto err;
-    }
-
-    gf_uuid_copy(loc.gfid, loc.inode->gfid);
-
-    if (gf_defrag_get_pause_state(&defrag->tier_conf) != TIER_RUNNING) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Tiering paused. "
-               "Exiting tier_migrate_link");
-        goto err;
-    }
-
-    ret = tier_migrate(this, query_cbk_args->is_promotion, migrate_data, &loc,
-                       &defrag->tier_conf);
-
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, -ret, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to "
-               "migrate %s ",
-               loc.path);
-        *per_link_status = -1;
-        goto err;
-    }
-
-    tier_update_migration_counters(query_cbk_args, defrag, total_migrated_bytes,
-                                   total_files);
-
-    ret = 0;
-
-err:
-    GF_FREE((char *)loc.name);
-    loc.name = NULL;
-    loc_wipe(&loc);
-    loc_wipe(&p_loc);
-
-    if ((*total_files >= defrag->tier_conf.max_migrate_files) ||
-        (*total_migrated_bytes > defrag->tier_conf.max_migrate_bytes)) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Reached cycle migration limit."
-               "migrated bytes %" PRId64 " files %d",
-               *total_migrated_bytes, *total_files);
-        ret = -1;
-    }
-
-    return ret;
-}
-
-static int
-tier_migrate_using_query_file(void *_args)
-{
-    int ret = -1;
-    query_cbk_args_t *query_cbk_args = (query_cbk_args_t *)_args;
-    xlator_t *this = NULL;
-    gf_defrag_info_t *defrag = NULL;
-    gfdb_query_record_t *query_record = NULL;
-    gfdb_link_info_t *link_info = NULL;
-    dict_t *migrate_data = NULL;
-    /*
-     * per_file_status and per_link_status
-     *  0  : success
-     * -1 : failure
-     *  1  : ignore the status and don't count for migration
-     * */
-    int per_file_status = 0;
-    int per_link_status = 0;
-    int total_status = 0;
-    dht_conf_t *conf = NULL;
-    uint64_t total_migrated_bytes = 0;
-    int total_files = 0;
-    loc_t root_loc = {0};
-    gfdb_time_t start_time = {0};
-    gfdb_time_t current_time = {0};
-    int total_time = 0;
-    int max_time = 0;
-    gf_boolean_t emergency_demote_mode = _gf_false;
-
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args, out);
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args->this, out);
-    this = query_cbk_args->this;
-    GF_VALIDATE_OR_GOTO(this->name, query_cbk_args->defrag, out);
-    GF_VALIDATE_OR_GOTO(this->name, query_cbk_args->qfile_array, out);
-    GF_VALIDATE_OR_GOTO(this->name, this->private, out);
-
-    conf = this->private;
-
-    defrag = query_cbk_args->defrag;
-    migrate_data = dict_new();
-    if (!migrate_data)
-        goto out;
-
-    emergency_demote_mode = (!query_cbk_args->is_promotion &&
-                             is_hot_tier_full(&defrag->tier_conf));
-
-    if (tier_set_migrate_data(migrate_data) != 0) {
-        goto out;
-    }
-
-    dht_build_root_loc(defrag->root_inode, &root_loc);
-
-    ret = gettimeofday(&start_time, NULL);
-    if (query_cbk_args->is_promotion) {
-        max_time = defrag->tier_conf.tier_promote_frequency;
-    } else {
-        max_time = defrag->tier_conf.tier_demote_frequency;
-    }
-
-    /* Per file */
-    while ((ret = read_query_record_list(query_cbk_args->qfile_array,
-                                         &query_record)) != 0) {
-        if (ret < 0) {
-            gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "Failed to fetch query record "
-                   "from query file");
-            goto out;
-        }
-
-        if (defrag->defrag_status != GF_DEFRAG_STATUS_STARTED) {
-            ret = -1;
-            gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "Exiting tier migration as"
-                   "defrag status is not started");
-            goto out;
-        }
-
-        ret = gettimeofday(&current_time, NULL);
-        if (ret < 0) {
-            gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "Could not get current time.");
-            goto out;
-        }
-
-        total_time = current_time.tv_sec - start_time.tv_sec;
-        if (total_time > max_time) {
-            gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                   "Max cycle time reached. Exiting migration.");
-            goto out;
-        }
-
-        per_file_status = 0;
-        per_link_status = 0;
-
-        if (gf_defrag_get_pause_state(&defrag->tier_conf) != TIER_RUNNING) {
-            gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                   "Tiering paused. "
-                   "Exiting tier_migrate_using_query_file");
-            break;
-        }
-
-        if (defrag->tier_conf.mode == TIER_MODE_WM) {
-            ret = tier_get_fs_stat(this, &root_loc);
-            if (ret != 0) {
-                gfdb_methods.gfdb_query_record_free(query_record);
-                query_record = NULL;
-                gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_STATUS,
-                       "tier_get_fs_stat() FAILED ... "
-                       "skipping file migrations until next cycle");
-                break;
-            }
-
-            if (!tier_do_migration(this, query_cbk_args->is_promotion)) {
-                gfdb_methods.gfdb_query_record_free(query_record);
-                query_record = NULL;
-
-                /* We have crossed the high watermark. Stop processing
-                 * files if this is a promotion cycle so demotion gets
-                 * a chance to start if not already running*/
-
-                if (query_cbk_args->is_promotion &&
-                    is_hot_tier_full(&defrag->tier_conf)) {
-                    gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                           "High watermark crossed during "
-                           "promotion. Exiting "
-                           "tier_migrate_using_query_file");
-                    break;
-                }
-                continue;
-            }
-        }
-
-        per_link_status = 0;
-
-        /* For now we only support single link migration. And we will
-         * ignore other hard links in the link info list of query record
-         * TODO: Multiple hard links migration */
-        if (!list_empty(&query_record->link_list)) {
-            link_info = list_first_entry(&query_record->link_list,
-                                         gfdb_link_info_t, list);
-        }
-        if (link_info != NULL) {
-            if (tier_migrate_link(this, conf, query_record->gfid, link_info,
-                                  defrag, query_cbk_args, migrate_data,
-                                  &per_link_status, &total_files,
-                                  &total_migrated_bytes) != 0) {
-                gf_msg(
-                    this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                    "%s failed for %s(gfid:%s)",
-                    (query_cbk_args->is_promotion ? "Promotion" : "Demotion"),
-                    link_info->file_name, uuid_utoa(query_record->gfid));
-            }
-        }
-        per_file_status = per_link_status;
-
-        if (per_file_status < 0) { /* Failure */
-            pthread_mutex_lock(&dm_stat_mutex);
-            defrag->total_failures++;
-            pthread_mutex_unlock(&dm_stat_mutex);
-        } else if (per_file_status == 0) { /* Success */
-            pthread_mutex_lock(&dm_stat_mutex);
-            defrag->total_files++;
-            pthread_mutex_unlock(&dm_stat_mutex);
-        } else if (per_file_status == 1) { /* Ignore */
-            per_file_status = 0;
-            /* Since this attempt was ignored we
-             * decrement the lookup count*/
-            pthread_mutex_lock(&dm_stat_mutex);
-            defrag->num_files_lookedup--;
-            pthread_mutex_unlock(&dm_stat_mutex);
-        }
-        total_status = total_status + per_file_status;
-        per_link_status = 0;
-        per_file_status = 0;
-
-        gfdb_methods.gfdb_query_record_free(query_record);
-        query_record = NULL;
-
-        /* If we are demoting and the entry watermark was HI, then
-         * we are done with emergency demotions if the current
-         * watermark has fallen below hi-watermark level
-         */
-        if (emergency_demote_mode) {
-            if (tier_check_watermark(this) == 0) {
-                if (!is_hot_tier_full(&defrag->tier_conf)) {
-                    break;
-                }
-            }
-        }
-    }
-
-out:
-    if (migrate_data)
-        dict_unref(migrate_data);
-
-    gfdb_methods.gfdb_query_record_free(query_record);
-    query_record = NULL;
-
-    return total_status;
-}
-
-/* This is the call back function per record/file from data base */
-static int
-tier_gf_query_callback(gfdb_query_record_t *gfdb_query_record, void *_args)
-{
-    int ret = -1;
-    query_cbk_args_t *query_cbk_args = _args;
-
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args, out);
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args->defrag, out);
-    GF_VALIDATE_OR_GOTO("tier", (query_cbk_args->query_fd > 0), out);
-
-    ret = gfdb_methods.gfdb_write_query_record(query_cbk_args->query_fd,
-                                               gfdb_query_record);
-    if (ret) {
-        gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed writing query record to query file");
-        goto out;
-    }
-
-    pthread_mutex_lock(&dm_stat_mutex);
-    query_cbk_args->defrag->num_files_lookedup++;
-    pthread_mutex_unlock(&dm_stat_mutex);
-
-    ret = 0;
-out:
-    return ret;
-}
-
-/* Create query file in tier process */
-static int
-tier_process_self_query(tier_brick_list_t *local_brick, void *args)
-{
-    int ret = -1;
-    char *db_path = NULL;
-    query_cbk_args_t *query_cbk_args = NULL;
-    xlator_t *this = NULL;
-    gfdb_conn_node_t *conn_node = NULL;
-    dict_t *params_dict = NULL;
-    dict_t *ctr_ipc_dict = NULL;
-    gfdb_brick_info_t *gfdb_brick_info = args;
-
-    /*Init of all the essentials*/
-    GF_VALIDATE_OR_GOTO("tier", gfdb_brick_info, out);
-    query_cbk_args = gfdb_brick_info->_query_cbk_args;
-
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args->this, out);
-    this = query_cbk_args->this;
-
-    GF_VALIDATE_OR_GOTO(this->name, gfdb_brick_info->_query_cbk_args, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->xlator, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->brick_db_path, out);
-
-    db_path = local_brick->brick_db_path;
-
-    /*Preparing DB parameters before init_db i.e getting db connection*/
-    params_dict = dict_new();
-    if (!params_dict) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "DB Params cannot initialized");
-        goto out;
-    }
-    SET_DB_PARAM_TO_DICT(this->name, params_dict,
-                         (char *)gfdb_methods.get_db_path_key(), db_path, ret,
-                         out);
-
-    /*Get the db connection*/
-    conn_node = gfdb_methods.init_db((void *)params_dict, dht_tier_db_type);
-    if (!conn_node) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "FATAL: Failed initializing db operations");
-        goto out;
-    }
-
-    /* Query for eligible files from db */
-    query_cbk_args->query_fd = open(local_brick->qfile_path,
-                                    O_WRONLY | O_CREAT | O_APPEND,
-                                    S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
-    if (query_cbk_args->query_fd < 0) {
-        gf_msg(this->name, GF_LOG_ERROR, errno, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to open query file %s", local_brick->qfile_path);
-        goto out;
-    }
-    if (!gfdb_brick_info->_gfdb_promote) {
-        if (query_cbk_args->defrag->tier_conf.watermark_last == TIER_WM_HI) {
-            /* emergency demotion mode */
-            ret = gfdb_methods.find_all(
-                conn_node, tier_gf_query_callback, (void *)query_cbk_args,
-                query_cbk_args->defrag->tier_conf.query_limit);
-        } else {
-            if (query_cbk_args->defrag->write_freq_threshold == 0 &&
-                query_cbk_args->defrag->read_freq_threshold == 0) {
-                ret = gfdb_methods.find_unchanged_for_time(
-                    conn_node, tier_gf_query_callback, (void *)query_cbk_args,
-                    gfdb_brick_info->time_stamp);
-            } else {
-                ret = gfdb_methods.find_unchanged_for_time_freq(
-                    conn_node, tier_gf_query_callback, (void *)query_cbk_args,
-                    gfdb_brick_info->time_stamp,
-                    query_cbk_args->defrag->write_freq_threshold,
-                    query_cbk_args->defrag->read_freq_threshold, _gf_false);
-            }
-        }
-    } else {
-        if (query_cbk_args->defrag->write_freq_threshold == 0 &&
-            query_cbk_args->defrag->read_freq_threshold == 0) {
-            ret = gfdb_methods.find_recently_changed_files(
-                conn_node, tier_gf_query_callback, (void *)query_cbk_args,
-                gfdb_brick_info->time_stamp);
-        } else {
-            ret = gfdb_methods.find_recently_changed_files_freq(
-                conn_node, tier_gf_query_callback, (void *)query_cbk_args,
-                gfdb_brick_info->time_stamp,
-                query_cbk_args->defrag->write_freq_threshold,
-                query_cbk_args->defrag->read_freq_threshold, _gf_false);
-        }
-    }
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "FATAL: query from db failed");
-        goto out;
-    }
-
-    /*Clear the heat on the DB entries*/
-    /*Preparing ctr_ipc_dict*/
-    ctr_ipc_dict = dict_new();
-    if (!ctr_ipc_dict) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "ctr_ipc_dict cannot initialized");
-        goto out;
-    }
-
-    SET_DB_PARAM_TO_DICT(this->name, ctr_ipc_dict, GFDB_IPC_CTR_KEY,
-                         GFDB_IPC_CTR_CLEAR_OPS, ret, out);
-
-    ret = syncop_ipc(local_brick->xlator, GF_IPC_TARGET_CTR, ctr_ipc_dict,
-                     NULL);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed clearing the heat "
-               "on db %s error %d",
-               local_brick->brick_db_path, ret);
-        goto out;
-    }
-
-    ret = 0;
-out:
-    if (params_dict) {
-        dict_unref(params_dict);
-        params_dict = NULL;
-    }
-
-    if (ctr_ipc_dict) {
-        dict_unref(ctr_ipc_dict);
-        ctr_ipc_dict = NULL;
-    }
-
-    if (query_cbk_args && query_cbk_args->query_fd >= 0) {
-        sys_close(query_cbk_args->query_fd);
-        query_cbk_args->query_fd = -1;
-    }
-    gfdb_methods.fini_db(conn_node);
-
-    return ret;
-}
-
-/*Ask CTR to create the query file*/
-static int
-tier_process_ctr_query(tier_brick_list_t *local_brick, void *args)
-{
-    int ret = -1;
-    query_cbk_args_t *query_cbk_args = NULL;
-    xlator_t *this = NULL;
-    dict_t *ctr_ipc_in_dict = NULL;
-    dict_t *ctr_ipc_out_dict = NULL;
-    gfdb_brick_info_t *gfdb_brick_info = args;
-    gfdb_ipc_ctr_params_t *ipc_ctr_params = NULL;
-    int count = 0;
-
-    /*Init of all the essentials*/
-    GF_VALIDATE_OR_GOTO("tier", gfdb_brick_info, out);
-    query_cbk_args = gfdb_brick_info->_query_cbk_args;
-
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args->this, out);
-    this = query_cbk_args->this;
-
-    GF_VALIDATE_OR_GOTO(this->name, gfdb_brick_info->_query_cbk_args, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->xlator, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->brick_db_path, out);
-
-    /*Preparing ctr_ipc_in_dict*/
-    ctr_ipc_in_dict = dict_new();
-    if (!ctr_ipc_in_dict) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "ctr_ipc_in_dict cannot initialized");
-        goto out;
-    }
-
-    ipc_ctr_params = GF_CALLOC(1, sizeof(gfdb_ipc_ctr_params_t),
-                               gf_tier_mt_ipc_ctr_params_t);
-    if (!ipc_ctr_params) {
-        goto out;
-    }
-
-    /* set all the query params*/
-    ipc_ctr_params->is_promote = gfdb_brick_info->_gfdb_promote;
-
-    ipc_ctr_params->write_freq_threshold = query_cbk_args->defrag
-                                               ->write_freq_threshold;
-
-    ipc_ctr_params->read_freq_threshold = query_cbk_args->defrag
-                                              ->read_freq_threshold;
-
-    ipc_ctr_params->query_limit = query_cbk_args->defrag->tier_conf.query_limit;
-
-    ipc_ctr_params->emergency_demote = (!gfdb_brick_info->_gfdb_promote &&
-                                        query_cbk_args->defrag->tier_conf
-                                                .watermark_last == TIER_WM_HI);
-
-    memcpy(&ipc_ctr_params->time_stamp, gfdb_brick_info->time_stamp,
-           sizeof(gfdb_time_t));
-
-    SET_DB_PARAM_TO_DICT(this->name, ctr_ipc_in_dict, GFDB_IPC_CTR_KEY,
-                         GFDB_IPC_CTR_QUERY_OPS, ret, out);
-
-    SET_DB_PARAM_TO_DICT(this->name, ctr_ipc_in_dict,
-                         GFDB_IPC_CTR_GET_QFILE_PATH, local_brick->qfile_path,
-                         ret, out);
-
-    ret = dict_set_bin(ctr_ipc_in_dict, GFDB_IPC_CTR_GET_QUERY_PARAMS,
-                       ipc_ctr_params, sizeof(*ipc_ctr_params));
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-               "Failed setting %s to params dictionary",
-               GFDB_IPC_CTR_GET_QUERY_PARAMS);
-        GF_FREE(ipc_ctr_params);
-        goto out;
-    }
-    ipc_ctr_params = NULL;
-
-    ret = syncop_ipc(local_brick->xlator, GF_IPC_TARGET_CTR, ctr_ipc_in_dict,
-                     &ctr_ipc_out_dict);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_IPC_TIER_ERROR,
-               "Failed query on %s ret %d", local_brick->brick_db_path, ret);
-        goto out;
-    }
-
-    ret = dict_get_int32(ctr_ipc_out_dict, GFDB_IPC_CTR_RET_QUERY_COUNT,
-                         &count);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed getting count "
-               "of records on %s",
-               local_brick->brick_db_path);
-        goto out;
-    }
-
-    if (count < 0) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed query on %s", local_brick->brick_db_path);
-        ret = -1;
-        goto out;
-    }
-
-    pthread_mutex_lock(&dm_stat_mutex);
-    query_cbk_args->defrag->num_files_lookedup = count;
-    pthread_mutex_unlock(&dm_stat_mutex);
-
-    ret = 0;
-out:
-
-    if (ctr_ipc_in_dict) {
-        dict_unref(ctr_ipc_in_dict);
-        ctr_ipc_in_dict = NULL;
-    }
-
-    if (ctr_ipc_out_dict) {
-        dict_unref(ctr_ipc_out_dict);
-        ctr_ipc_out_dict = NULL;
-    }
-
-    GF_FREE(ipc_ctr_params);
-
-    return ret;
-}
-
-/* This is the call back function for each brick from hot/cold bricklist
- * It picks up each bricks db and queries for eligible files for migration.
- * The list of eligible files are populated in appropriate query files*/
-static int
-tier_process_brick(tier_brick_list_t *local_brick, void *args)
-{
-    int ret = -1;
-    dict_t *ctr_ipc_in_dict = NULL;
-    dict_t *ctr_ipc_out_dict = NULL;
-    char *strval = NULL;
-
-    GF_VALIDATE_OR_GOTO("tier", local_brick, out);
-
-    GF_VALIDATE_OR_GOTO("tier", local_brick->xlator, out);
-
-    if (dht_tier_db_type == GFDB_SQLITE3) {
-        /*Preparing ctr_ipc_in_dict*/
-        ctr_ipc_in_dict = dict_new();
-        if (!ctr_ipc_in_dict) {
-            gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "ctr_ipc_in_dict cannot initialized");
-            goto out;
-        }
-
-        ret = dict_set_str(ctr_ipc_in_dict, GFDB_IPC_CTR_KEY,
-                           GFDB_IPC_CTR_GET_DB_PARAM_OPS);
-        if (ret) {
-            gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-                   "Failed to set %s "
-                   "to params dictionary",
-                   GFDB_IPC_CTR_KEY);
-            goto out;
-        }
-
-        ret = dict_set_str(ctr_ipc_in_dict, GFDB_IPC_CTR_GET_DB_PARAM_OPS, "");
-        if (ret) {
-            gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-                   "Failed to set %s "
-                   "to params dictionary",
-                   GFDB_IPC_CTR_GET_DB_PARAM_OPS);
-            goto out;
-        }
-
-        ret = dict_set_str(ctr_ipc_in_dict, GFDB_IPC_CTR_GET_DB_KEY,
-                           "journal_mode");
-        if (ret) {
-            gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-                   "Failed to set %s "
-                   "to params dictionary",
-                   GFDB_IPC_CTR_GET_DB_KEY);
-            goto out;
-        }
-
-        ret = syncop_ipc(local_brick->xlator, GF_IPC_TARGET_CTR,
-                         ctr_ipc_in_dict, &ctr_ipc_out_dict);
-        if (ret || ctr_ipc_out_dict == NULL) {
-            gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "Failed to get "
-                   "journal_mode of sql db %s",
-                   local_brick->brick_db_path);
-            goto out;
-        }
-
-        ret = dict_get_str(ctr_ipc_out_dict, "journal_mode", &strval);
-        if (ret) {
-            gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_GET_PARAM_FAILED,
-                   "Failed to get %s "
-                   "from params dictionary"
-                   "journal_mode",
-                   strval);
-            goto out;
-        }
-
-        if (strval && (strncmp(strval, "wal", SLEN("wal")) == 0)) {
-            ret = tier_process_self_query(local_brick, args);
-            if (ret) {
-                goto out;
-            }
-        } else {
-            ret = tier_process_ctr_query(local_brick, args);
-            if (ret) {
-                goto out;
-            }
-        }
-        ret = 0;
-
-    } else {
-        ret = tier_process_self_query(local_brick, args);
-        if (ret) {
-            goto out;
-        }
-    }
-
-    ret = 0;
-out:
-    if (ctr_ipc_in_dict)
-        dict_unref(ctr_ipc_in_dict);
-
-    if (ctr_ipc_out_dict)
-        dict_unref(ctr_ipc_out_dict);
-
-    return ret;
-}
-
-static int
-tier_build_migration_qfile(migration_args_t *args,
-                           query_cbk_args_t *query_cbk_args,
-                           gf_boolean_t is_promotion)
-{
-    gfdb_time_t current_time;
-    gfdb_brick_info_t gfdb_brick_info;
-    gfdb_time_t time_in_past;
-    int ret = -1;
-    tier_brick_list_t *local_brick = NULL;
-    int i = 0;
-    time_in_past.tv_sec = args->freq_time;
-    time_in_past.tv_usec = 0;
-
-    ret = gettimeofday(&current_time, NULL);
-    if (ret == -1) {
-        gf_msg(args->this->name, GF_LOG_ERROR, errno,
-               DHT_MSG_SYS_CALL_GET_TIME_FAILED, "Failed to get current time");
-        goto out;
-    }
-    time_in_past.tv_sec = current_time.tv_sec - time_in_past.tv_sec;
-
-    /* The migration daemon may run a varying numberof usec after the */
-    /* sleep call triggers. A file may be registered in CTR some number */
-    /* of usec X after the daemon started and missed in the subsequent */
-    /* cycle if the daemon starts Y usec after the period in seconds */
-    /* where Y>X. Normalize away this problem by always setting usec */
-    /* to 0. */
-    time_in_past.tv_usec = 0;
-
-    gfdb_brick_info.time_stamp = &time_in_past;
-    gfdb_brick_info._gfdb_promote = is_promotion;
-    gfdb_brick_info._query_cbk_args = query_cbk_args;
-
-    list_for_each_entry(local_brick, args->brick_list, list)
-    {
-        /* Construct query file path for this brick
-         * i.e
-         * /var/run/gluster/xlator_name/
-         * {promote/demote}-brickname-indexinbricklist
-         * So that no two query files will have same path even
-         * bricks have the same name
-         * */
-        snprintf(local_brick->qfile_path, PATH_MAX, "%s-%s-%d",
-                 GET_QFILE_PATH(gfdb_brick_info._gfdb_promote),
-                 local_brick->brick_name, i);
-
-        /* Delete any old query files for this brick */
-        sys_unlink(local_brick->qfile_path);
-
-        ret = tier_process_brick(local_brick, &gfdb_brick_info);
-        if (ret) {
-            gf_msg(args->this->name, GF_LOG_ERROR, 0,
-                   DHT_MSG_BRICK_QUERY_FAILED, "Brick %s query failed\n",
-                   local_brick->brick_db_path);
-        }
-        i++;
-    }
-    ret = 0;
-out:
-    return ret;
-}
-
-static int
-tier_migrate_files_using_qfile(migration_args_t *comp,
-                               query_cbk_args_t *query_cbk_args)
-{
-    int ret = -1;
-    tier_brick_list_t *local_brick = NULL;
-    tier_brick_list_t *temp = NULL;
-    gfdb_time_t current_time = {
-        0,
-    };
-    ssize_t qfile_array_size = 0;
-    int count = 0;
-    int temp_fd = 0;
-    gf_tier_conf_t *tier_conf = NULL;
-
-    tier_conf = &(query_cbk_args->defrag->tier_conf);
-
-    /* Time for error query files */
-    gettimeofday(&current_time, NULL);
-
-    /* Build the qfile list */
-    list_for_each_entry_safe(local_brick, temp, comp->brick_list, list)
-    {
-        qfile_array_size++;
-    }
-    query_cbk_args->qfile_array = qfile_array_new(qfile_array_size);
-    if (!query_cbk_args->qfile_array) {
-        gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to create new "
-               "qfile_array");
-        goto out;
-    }
-
-    /*Open all qfiles*/
-    count = 0;
-    query_cbk_args->qfile_array->exhausted_count = 0;
-    list_for_each_entry_safe(local_brick, temp, comp->brick_list, list)
-    {
-        temp_fd = query_cbk_args->qfile_array->fd_array[count];
-        temp_fd = open(local_brick->qfile_path, O_RDONLY,
-                       S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
-        if (temp_fd < 0) {
-            gf_msg("tier", GF_LOG_ERROR, errno, DHT_MSG_LOG_TIER_ERROR,
-                   "Failed to open "
-                   "%s to the query file",
-                   local_brick->qfile_path);
-            query_cbk_args->qfile_array->exhausted_count++;
-        }
-        query_cbk_args->qfile_array->fd_array[count] = temp_fd;
-        count++;
-    }
-
-    /* Moving the query file index to the next, so that we won't the same
-     * query file every cycle as the first one */
-    query_cbk_args->qfile_array
-        ->next_index = (query_cbk_args->is_promotion)
-                           ? tier_conf->last_promote_qfile_index
-                           : tier_conf->last_demote_qfile_index;
-    shift_next_index(query_cbk_args->qfile_array);
-    if (query_cbk_args->is_promotion) {
-        tier_conf->last_promote_qfile_index = query_cbk_args->qfile_array
-                                                  ->next_index;
-    } else {
-        tier_conf->last_demote_qfile_index = query_cbk_args->qfile_array
-                                                 ->next_index;
-    }
-
-    /* Migrate files using query file list */
-    ret = tier_migrate_using_query_file((void *)query_cbk_args);
-out:
-    qfile_array_free(query_cbk_args->qfile_array);
-
-    /* If there is an error rename all the query files to .err files
-     * with a timestamp for better debugging */
-    if (ret) {
-        struct tm tm = {
-            0,
-        };
-        char time_str[128] = {
-            0,
-        };
-        char query_file_path_err[PATH_MAX] = {
-            0,
-        };
-        int32_t len = 0;
-
-        /* Time format for error query files */
-        gmtime_r(&current_time.tv_sec, &tm);
-        strftime(time_str, sizeof(time_str), "%F-%T", &tm);
-
-        list_for_each_entry_safe(local_brick, temp, comp->brick_list, list)
-        {
-            /* rename error qfile*/
-            len = snprintf(query_file_path_err, sizeof(query_file_path_err),
-                           "%s-%s.err", local_brick->qfile_path, time_str);
-            if ((len >= 0) && (len < sizeof(query_file_path_err))) {
-                if (sys_rename(local_brick->qfile_path, query_file_path_err) ==
-                    -1)
-                    gf_msg_debug("tier", 0,
-                                 "rename "
-                                 "failed");
-            }
-        }
-    }
-
-    query_cbk_args->qfile_array = NULL;
-
-    return ret;
-}
-
-int
-tier_demote(migration_args_t *demotion_args)
-{
-    query_cbk_args_t query_cbk_args;
-    int ret = -1;
-
-    GF_VALIDATE_OR_GOTO("tier", demotion_args, out);
-    GF_VALIDATE_OR_GOTO("tier", demotion_args->this, out);
-    GF_VALIDATE_OR_GOTO(demotion_args->this->name, demotion_args->brick_list,
-                        out);
-    GF_VALIDATE_OR_GOTO(demotion_args->this->name, demotion_args->defrag, out);
-
-    THIS = demotion_args->this;
-
-    query_cbk_args.this = demotion_args->this;
-    query_cbk_args.defrag = demotion_args->defrag;
-    query_cbk_args.is_promotion = 0;
-
-    /*Build the query file using bricklist*/
-    ret = tier_build_migration_qfile(demotion_args, &query_cbk_args, _gf_false);
-    if (ret)
-        goto out;
-
-    /* Migrate files using the query file */
-    ret = tier_migrate_files_using_qfile(demotion_args, &query_cbk_args);
-    if (ret)
-        goto out;
-
-out:
-    demotion_args->return_value = ret;
-    return ret;
-}
-
-int
-tier_promote(migration_args_t *promotion_args)
-{
-    int ret = -1;
-    query_cbk_args_t query_cbk_args;
-
-    GF_VALIDATE_OR_GOTO("tier", promotion_args->this, out);
-    GF_VALIDATE_OR_GOTO(promotion_args->this->name, promotion_args->brick_list,
-                        out);
-    GF_VALIDATE_OR_GOTO(promotion_args->this->name, promotion_args->defrag,
-                        out);
-
-    THIS = promotion_args->this;
-
-    query_cbk_args.this = promotion_args->this;
-    query_cbk_args.defrag = promotion_args->defrag;
-    query_cbk_args.is_promotion = 1;
-
-    /*Build the query file using bricklist*/
-    ret = tier_build_migration_qfile(promotion_args, &query_cbk_args, _gf_true);
-    if (ret)
-        goto out;
-
-    /* Migrate files using the query file */
-    ret = tier_migrate_files_using_qfile(promotion_args, &query_cbk_args);
-    if (ret)
-        goto out;
-
-out:
-    promotion_args->return_value = ret;
-    return ret;
-}
-
-/*
- * Command the CTR on a brick to compact the local database using an IPC
- */
-static int
-tier_process_self_compact(tier_brick_list_t *local_brick, void *args)
-{
-    int ret = -1;
-    char *db_path = NULL;
-    query_cbk_args_t *query_cbk_args = NULL;
-    xlator_t *this = NULL;
-    gfdb_conn_node_t *conn_node = NULL;
-    dict_t *params_dict = NULL;
-    dict_t *ctr_ipc_dict = NULL;
-    gfdb_brick_info_t *gfdb_brick_info = args;
-
-    /*Init of all the essentials*/
-    GF_VALIDATE_OR_GOTO("tier", gfdb_brick_info, out);
-    query_cbk_args = gfdb_brick_info->_query_cbk_args;
-
-    GF_VALIDATE_OR_GOTO("tier", query_cbk_args->this, out);
-    this = query_cbk_args->this;
-
-    GF_VALIDATE_OR_GOTO(this->name, gfdb_brick_info->_query_cbk_args, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->xlator, out);
-
-    GF_VALIDATE_OR_GOTO(this->name, local_brick->brick_db_path, out);
-
-    db_path = local_brick->brick_db_path;
-
-    /*Preparing DB parameters before init_db i.e getting db connection*/
-    params_dict = dict_new();
-    if (!params_dict) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "DB Params cannot initialized");
-        goto out;
-    }
-    SET_DB_PARAM_TO_DICT(this->name, params_dict,
-                         (char *)gfdb_methods.get_db_path_key(), db_path, ret,
-                         out);
-
-    /*Get the db connection*/
-    conn_node = gfdb_methods.init_db((void *)params_dict, dht_tier_db_type);
-    if (!conn_node) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "FATAL: Failed initializing db operations");
-        goto out;
-    }
-
-    ret = 0;
-
-    /*Preparing ctr_ipc_dict*/
-    ctr_ipc_dict = dict_new();
-    if (!ctr_ipc_dict) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "ctr_ipc_dict cannot initialized");
-        goto out;
-    }
-
-    ret = dict_set_int32(ctr_ipc_dict, "compact_active",
-                         query_cbk_args->defrag->tier_conf.compact_active);
-
-    if (ret) {
-        gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-               "Failed to set %s "
-               "to params dictionary",
-               "compact_active");
-        goto out;
-    }
-
-    ret = dict_set_int32(
-        ctr_ipc_dict, "compact_mode_switched",
-        query_cbk_args->defrag->tier_conf.compact_mode_switched);
-
-    if (ret) {
-        gf_msg("tier", GF_LOG_ERROR, 0, LG_MSG_SET_PARAM_FAILED,
-               "Failed to set %s "
-               "to params dictionary",
-               "compact_mode_switched");
-        goto out;
-    }
-
-    SET_DB_PARAM_TO_DICT(this->name, ctr_ipc_dict, GFDB_IPC_CTR_KEY,
-                         GFDB_IPC_CTR_SET_COMPACT_PRAGMA, ret, out);
-
-    gf_msg(this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-           "Starting Compaction IPC");
-
-    ret = syncop_ipc(local_brick->xlator, GF_IPC_TARGET_CTR, ctr_ipc_dict,
-                     NULL);
-
-    gf_msg(this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-           "Ending Compaction IPC");
-
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed compaction "
-               "on db %s error %d",
-               local_brick->brick_db_path, ret);
-        goto out;
-    }
-
-    gf_msg(this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-           "SUCCESS: %s Compaction", local_brick->brick_name);
-
-    ret = 0;
-out:
-    if (params_dict) {
-        dict_unref(params_dict);
-        params_dict = NULL;
-    }
-
-    if (ctr_ipc_dict) {
-        dict_unref(ctr_ipc_dict);
-        ctr_ipc_dict = NULL;
-    }
-
-    gfdb_methods.fini_db(conn_node);
-
-    return ret;
-}
-
-/*
- * This is the call back function for each brick from hot/cold bricklist.
- * It determines the database type on each brick and calls the corresponding
- * function to prepare the compaction IPC.
- */
-static int
-tier_compact_db_brick(tier_brick_list_t *local_brick, void *args)
-{
-    int ret = -1;
-
-    GF_VALIDATE_OR_GOTO("tier", local_brick, out);
-
-    GF_VALIDATE_OR_GOTO("tier", local_brick->xlator, out);
-
-    ret = tier_process_self_compact(local_brick, args);
-    if (ret) {
-        gf_msg("tier", GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Brick %s did not compact", local_brick->brick_name);
-        goto out;
-    }
-
-    ret = 0;
-
-out:
-
-    return ret;
-}
-
-static int
-tier_send_compact(migration_args_t *args, query_cbk_args_t *query_cbk_args)
-{
-    gfdb_time_t current_time;
-    gfdb_brick_info_t gfdb_brick_info;
-    gfdb_time_t time_in_past;
-    int ret = -1;
-    tier_brick_list_t *local_brick = NULL;
-
-    time_in_past.tv_sec = args->freq_time;
-    time_in_past.tv_usec = 0;
-
-    ret = gettimeofday(&current_time, NULL);
-    if (ret == -1) {
-        gf_msg(args->this->name, GF_LOG_ERROR, errno,
-               DHT_MSG_SYS_CALL_GET_TIME_FAILED, "Failed to get current time");
-        goto out;
-    }
-    time_in_past.tv_sec = current_time.tv_sec - time_in_past.tv_sec;
-
-    /* The migration daemon may run a varying numberof usec after the sleep
-       call triggers. A file may be registered in CTR some number of usec X
-       after the daemon started and missed in the subsequent cycle if the
-       daemon starts Y usec after the period in seconds where Y>X. Normalize
-       away this problem by always setting usec to 0. */
-    time_in_past.tv_usec = 0;
-
-    gfdb_brick_info.time_stamp = &time_in_past;
-
-    /* This is meant to say we are always compacting at this point */
-    /* We simply borrow the promotion flag to do this */
-    gfdb_brick_info._gfdb_promote = 1;
-
-    gfdb_brick_info._query_cbk_args = query_cbk_args;
-
-    list_for_each_entry(local_brick, args->brick_list, list)
-    {
-        gf_msg(args->this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Start compaction for %s", local_brick->brick_name);
-
-        ret = tier_compact_db_brick(local_brick, &gfdb_brick_info);
-        if (ret) {
-            gf_msg(args->this->name, GF_LOG_ERROR, 0,
-                   DHT_MSG_BRICK_QUERY_FAILED, "Brick %s compaction failed\n",
-                   local_brick->brick_db_path);
-        }
-
-        gf_msg(args->this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-               "End compaction for %s", local_brick->brick_name);
-    }
-    ret = 0;
-out:
-    return ret;
-}
-
-static int
-tier_compact(void *args)
-{
-    int ret = -1;
-    query_cbk_args_t query_cbk_args;
-    migration_args_t *compaction_args = args;
-
-    GF_VALIDATE_OR_GOTO("tier", compaction_args->this, out);
-    GF_VALIDATE_OR_GOTO(compaction_args->this->name,
-                        compaction_args->brick_list, out);
-    GF_VALIDATE_OR_GOTO(compaction_args->this->name, compaction_args->defrag,
-                        out);
-
-    THIS = compaction_args->this;
-
-    query_cbk_args.this = compaction_args->this;
-    query_cbk_args.defrag = compaction_args->defrag;
-    query_cbk_args.is_compaction = 1;
-
-    /* Send the compaction pragma out to all the bricks on the bricklist. */
-    /* tier_get_bricklist ensures all bricks on the list are local to */
-    /* this node. */
-    ret = tier_send_compact(compaction_args, &query_cbk_args);
-    if (ret)
-        goto out;
-
-    ret = 0;
-out:
-    compaction_args->return_value = ret;
-    return ret;
-}
-
-static int
-tier_get_bricklist(xlator_t *xl, struct list_head *local_bricklist_head)
-{
-    xlator_list_t *child = NULL;
-    char *rv = NULL;
-    char *rh = NULL;
-    char *brickname = NULL;
-    char db_name[PATH_MAX] = "";
-    int ret = 0;
-    tier_brick_list_t *local_brick = NULL;
-    int32_t len = 0;
-
-    GF_VALIDATE_OR_GOTO("tier", xl, out);
-    GF_VALIDATE_OR_GOTO("tier", local_bricklist_head, out);
-
-    /*
-     * This function obtains remote subvolumes and filters out only
-     * those running on the same node as the tier daemon.
-     */
-    if (strcmp(xl->type, "protocol/client") == 0) {
-        ret = dict_get_str(xl->options, "remote-host", &rh);
-        if (ret < 0)
-            goto out;
-
-        if (gf_is_local_addr(rh)) {
-            local_brick = GF_CALLOC(1, sizeof(tier_brick_list_t),
-                                    gf_tier_mt_bricklist_t);
-            if (!local_brick) {
-                goto out;
-            }
-
-            ret = dict_get_str(xl->options, "remote-subvolume", &rv);
-            if (ret < 0)
-                goto out;
-
-            brickname = strrchr(rv, '/') + 1;
-            snprintf(db_name, sizeof(db_name), "%s.db", brickname);
-
-            local_brick->brick_db_path = GF_MALLOC(PATH_MAX, gf_common_mt_char);
-            if (!local_brick->brick_db_path) {
-                gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_STATUS,
-                       "Failed to allocate memory for"
-                       " bricklist.");
-                ret = -1;
-                goto out;
-            }
-
-            len = snprintf(local_brick->brick_db_path, PATH_MAX, "%s/%s/%s", rv,
-                           GF_HIDDEN_PATH, db_name);
-            if ((len < 0) || (len >= PATH_MAX)) {
-                gf_msg("tier", GF_LOG_ERROR, EINVAL, DHT_MSG_LOG_TIER_STATUS,
-                       "DB path too long");
-                ret = -1;
-                goto out;
-            }
-
-            local_brick->xlator = xl;
-
-            snprintf(local_brick->brick_name, NAME_MAX, "%s", brickname);
-
-            list_add_tail(&(local_brick->list), local_bricklist_head);
-
-            ret = 0;
-            goto out;
-        }
-    }
-
-    for (child = xl->children; child; child = child->next) {
-        ret = tier_get_bricklist(child->xlator, local_bricklist_head);
-        if (ret) {
-            goto out;
-        }
-    }
-
-    ret = 0;
-out:
-
-    if (ret) {
-        if (local_brick) {
-            GF_FREE(local_brick->brick_db_path);
-        }
-        GF_FREE(local_brick);
-    }
-
-    return ret;
-}
-
-int
-tier_get_freq_demote(gf_tier_conf_t *tier_conf)
-{
-    if ((tier_conf->mode == TIER_MODE_WM) &&
-        (tier_conf->watermark_last == TIER_WM_HI))
-        return DEFAULT_DEMOTE_DEGRADED;
-    else
-        return tier_conf->tier_demote_frequency;
-}
-
-int
-tier_get_freq_promote(gf_tier_conf_t *tier_conf)
-{
-    return tier_conf->tier_promote_frequency;
-}
-
-int
-tier_get_freq_compact_hot(gf_tier_conf_t *tier_conf)
-{
-    return tier_conf->tier_compact_hot_frequency;
-}
-
-int
-tier_get_freq_compact_cold(gf_tier_conf_t *tier_conf)
-{
-    return tier_conf->tier_compact_cold_frequency;
-}
-
-static int
-tier_check_demote(gfdb_time_t current_time, int freq)
-{
-    return ((current_time.tv_sec % freq) == 0) ? _gf_true : _gf_false;
-}
-
-static gf_boolean_t
-tier_check_promote(gf_tier_conf_t *tier_conf, gfdb_time_t current_time,
-                   int freq)
-{
-    if ((tier_conf->mode == TIER_MODE_WM) &&
-        (tier_conf->watermark_last == TIER_WM_HI))
-        return _gf_false;
-
-    else
-        return ((current_time.tv_sec % freq) == 0) ? _gf_true : _gf_false;
-}
-
-static gf_boolean_t
-tier_check_compact(gf_tier_conf_t *tier_conf, gfdb_time_t current_time,
-                   int freq_compact)
-{
-    if (!(tier_conf->compact_active || tier_conf->compact_mode_switched))
-        return _gf_false;
-
-    return ((current_time.tv_sec % freq_compact) == 0) ? _gf_true : _gf_false;
-}
-
-void
-clear_bricklist(struct list_head *brick_list)
-{
-    tier_brick_list_t *local_brick = NULL;
-    tier_brick_list_t *temp = NULL;
-
-    if (list_empty(brick_list)) {
-        return;
-    }
-
-    list_for_each_entry_safe(local_brick, temp, brick_list, list)
-    {
-        list_del(&local_brick->list);
-        GF_FREE(local_brick->brick_db_path);
-        GF_FREE(local_brick);
-    }
-}
-
-static void
-set_brick_list_qpath(struct list_head *brick_list, gf_boolean_t is_cold)
-{
-    tier_brick_list_t *local_brick = NULL;
-    int i = 0;
-
-    GF_VALIDATE_OR_GOTO("tier", brick_list, out);
-
-    list_for_each_entry(local_brick, brick_list, list)
-    {
-        /* Construct query file path for this brick
-         * i.e
-         * /var/run/gluster/xlator_name/
-         * {promote/demote}-brickname-indexinbricklist
-         * So that no two query files will have same path even
-         * bricks have the same name
-         * */
-        snprintf(local_brick->qfile_path, PATH_MAX, "%s-%s-%d",
-                 GET_QFILE_PATH(is_cold), local_brick->brick_name, i);
-        i++;
-    }
-out:
-    return;
-}
-
-static int
-tier_prepare_compact(migration_args_t *args, gfdb_time_t current_time)
-{
-    xlator_t *this = NULL;
-    dht_conf_t *conf = NULL;
-    gf_defrag_info_t *defrag = NULL;
-    gf_tier_conf_t *tier_conf = NULL;
-    gf_boolean_t is_hot_tier = args->is_hot_tier;
-    int freq = 0;
-    int ret = -1;
-    const char *tier_type = is_hot_tier ? "hot" : "cold";
-
-    this = args->this;
-
-    conf = this->private;
-
-    defrag = conf->defrag;
-
-    tier_conf = &defrag->tier_conf;
-
-    freq = is_hot_tier ? tier_get_freq_compact_hot(tier_conf)
-                       : tier_get_freq_compact_cold(tier_conf);
-
-    defrag->tier_conf.compact_mode_switched =
-        is_hot_tier ? defrag->tier_conf.compact_mode_switched_hot
-                    : defrag->tier_conf.compact_mode_switched_cold;
-
-    gf_msg(this->name, GF_LOG_TRACE, 0, DHT_MSG_LOG_TIER_STATUS,
-           "Compact mode %i", defrag->tier_conf.compact_mode_switched);
-
-    if (tier_check_compact(tier_conf, current_time, freq)) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "Start compaction on %s tier", tier_type);
-
-        args->freq_time = freq;
-        ret = tier_compact(args);
-        if (ret) {
-            gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "Compaction failed on "
-                   "%s tier",
-                   tier_type);
-            goto out;
-        }
-
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-               "End compaction on %s tier", tier_type);
-
-        if (is_hot_tier) {
-            defrag->tier_conf.compact_mode_switched_hot = _gf_false;
-        } else {
-            defrag->tier_conf.compact_mode_switched_cold = _gf_false;
-        }
-    }
-
-out:
-    return ret;
-}
-
-static int
-tier_get_wm_interval(tier_mode_t mode, tier_watermark_op_t wm)
-{
-    if (mode == TIER_MODE_WM && wm == TIER_WM_HI)
-        return WM_INTERVAL_EMERG;
-
-    return WM_INTERVAL;
-}
-
-/*
- * Main tiering loop. This is called from the promotion and the
- * demotion threads spawned in tier_start().
- *
- * Every second, wake from sleep to perform tasks.
- * 1. Check trigger to migrate data.
- * 2. Check for state changes (pause, unpause, stop).
- */
-static void *
-tier_run(void *in_args)
-{
-    dht_conf_t *conf = NULL;
-    gfdb_time_t current_time = {0};
-    int freq = 0;
-    int ret = 0;
-    xlator_t *any = NULL;
-    xlator_t *xlator = NULL;
-    gf_tier_conf_t *tier_conf = NULL;
-    loc_t root_loc = {0};
-    int check_watermark = 0;
-    gf_defrag_info_t *defrag = NULL;
-    xlator_t *this = NULL;
-    migration_args_t *args = in_args;
-    GF_VALIDATE_OR_GOTO("tier", args, out);
-    GF_VALIDATE_OR_GOTO("tier", args->brick_list, out);
-
-    this = args->this;
-    GF_VALIDATE_OR_GOTO("tier", this, out);
-
-    conf = this->private;
-    GF_VALIDATE_OR_GOTO("tier", conf, out);
-
-    defrag = conf->defrag;
-    GF_VALIDATE_OR_GOTO("tier", defrag, out);
-
-    if (list_empty(args->brick_list)) {
-        gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Brick list for tier is empty. Exiting.");
-        goto out;
-    }
-
-    defrag->defrag_status = GF_DEFRAG_STATUS_STARTED;
-    tier_conf = &defrag->tier_conf;
-
-    dht_build_root_loc(defrag->root_inode, &root_loc);
-
-    while (1) {
-        /*
-         * Check if a graph switch occurred. If so, stop migration
-         * thread. It will need to be restarted manually.
-         */
-        any = THIS->ctx->active->first;
-        xlator = xlator_search_by_name(any, this->name);
-
-        if (xlator != this) {
-            gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                   "Detected graph switch. Exiting migration "
-                   "daemon.");
-            goto out;
-        }
-
-        gf_defrag_check_pause_tier(tier_conf);
-
-        sleep(1);
-
-        if (defrag->defrag_status != GF_DEFRAG_STATUS_STARTED) {
-            ret = 1;
-            gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "defrag->defrag_status != "
-                   "GF_DEFRAG_STATUS_STARTED");
-            goto out;
-        }
-
-        if (defrag->cmd == GF_DEFRAG_CMD_START_DETACH_TIER ||
-            defrag->cmd == GF_DEFRAG_CMD_DETACH_START) {
-            ret = 0;
-            defrag->defrag_status = GF_DEFRAG_STATUS_COMPLETE;
-            gf_msg(this->name, GF_LOG_DEBUG, 0, DHT_MSG_LOG_TIER_ERROR,
-                   "defrag->defrag_cmd == "
-                   "GF_DEFRAG_CMD_START_DETACH_TIER");
-            goto out;
-        }
-
-        if (gf_defrag_get_pause_state(&defrag->tier_conf) != TIER_RUNNING)
-            continue;
-
-        /* To have proper synchronization amongst all
-         * brick holding nodes, so that promotion and demotions
-         * start atomically w.r.t promotion/demotion frequency
-         * period, all nodes should have their system time
-         * in-sync with each other either manually set or
-         * using a NTP server*/
-        ret = gettimeofday(&current_time, NULL);
-        if (ret == -1) {
-            gf_msg(this->name, GF_LOG_ERROR, errno,
-                   DHT_MSG_SYS_CALL_GET_TIME_FAILED,
-                   "Failed to get current time");
-            goto out;
-        }
-
-        check_watermark++;
-
-        /* emergency demotion requires frequent watermark monitoring */
-        if (check_watermark >=
-            tier_get_wm_interval(tier_conf->mode, tier_conf->watermark_last)) {
-            check_watermark = 0;
-            if (tier_conf->mode == TIER_MODE_WM) {
-                ret = tier_get_fs_stat(this, &root_loc);
-                if (ret != 0) {
-                    continue;
-                }
-                ret = tier_check_watermark(this);
-                if (ret != 0) {
-                    gf_msg(this->name, GF_LOG_CRITICAL, errno,
-                           DHT_MSG_LOG_TIER_ERROR, "Failed to get watermark");
-                    continue;
-                }
-            }
-        }
-
-        if (args->is_promotion) {
-            freq = tier_get_freq_promote(tier_conf);
-
-            if (tier_check_promote(tier_conf, current_time, freq)) {
-                args->freq_time = freq;
-                ret = tier_promote(args);
-                if (ret) {
-                    gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                           "Promotion failed");
-                }
-            }
-        } else if (args->is_compaction) {
-            tier_prepare_compact(args, current_time);
-        } else {
-            freq = tier_get_freq_demote(tier_conf);
-
-            if (tier_check_demote(current_time, freq)) {
-                args->freq_time = freq;
-                ret = tier_demote(args);
-                if (ret) {
-                    gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                           "Demotion failed");
-                }
-            }
-        }
-
-        /* Check the statfs immediately after the processing threads
-           return */
-        check_watermark = WM_INTERVAL;
-    }
-
-    ret = 0;
-out:
-
-    args->return_value = ret;
-
-    return NULL;
-}
-
-int
-tier_start(xlator_t *this, gf_defrag_info_t *defrag)
-{
-    pthread_t promote_thread;
-    pthread_t demote_thread;
-    pthread_t hot_compact_thread;
-    pthread_t cold_compact_thread;
-    int ret = -1;
-    struct list_head bricklist_hot = {0};
-    struct list_head bricklist_cold = {0};
-    migration_args_t promotion_args = {0};
-    migration_args_t demotion_args = {0};
-    migration_args_t hot_compaction_args = {0};
-    migration_args_t cold_compaction_args = {0};
-    dht_conf_t *conf = NULL;
-
-    INIT_LIST_HEAD((&bricklist_hot));
-    INIT_LIST_HEAD((&bricklist_cold));
-
-    conf = this->private;
-
-    tier_get_bricklist(conf->subvolumes[1], &bricklist_hot);
-    set_brick_list_qpath(&bricklist_hot, _gf_false);
-
-    demotion_args.this = this;
-    demotion_args.brick_list = &bricklist_hot;
-    demotion_args.defrag = defrag;
-    demotion_args.is_promotion = _gf_false;
-    demotion_args.is_compaction = _gf_false;
-
-    ret = gf_thread_create(&demote_thread, NULL, &tier_run, &demotion_args,
-                           "tierdem");
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to start demotion thread.");
-        defrag->defrag_status = GF_DEFRAG_STATUS_FAILED;
-        goto cleanup;
-    }
-
-    tier_get_bricklist(conf->subvolumes[0], &bricklist_cold);
-    set_brick_list_qpath(&bricklist_cold, _gf_true);
-
-    promotion_args.this = this;
-    promotion_args.brick_list = &bricklist_cold;
-    promotion_args.defrag = defrag;
-    promotion_args.is_promotion = _gf_true;
-
-    ret = gf_thread_create(&promote_thread, NULL, &tier_run, &promotion_args,
-                           "tierpro");
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to start promotion thread.");
-        defrag->defrag_status = GF_DEFRAG_STATUS_FAILED;
-        goto waitforspawned;
-    }
-
-    hot_compaction_args.this = this;
-    hot_compaction_args.brick_list = &bricklist_hot;
-    hot_compaction_args.defrag = defrag;
-    hot_compaction_args.is_promotion = _gf_false;
-    hot_compaction_args.is_compaction = _gf_true;
-    hot_compaction_args.is_hot_tier = _gf_true;
-
-    ret = gf_thread_create(&hot_compact_thread, NULL, &tier_run,
-                           &hot_compaction_args, "tierhcom");
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to start compaction thread.");
-        defrag->defrag_status = GF_DEFRAG_STATUS_FAILED;
-        goto waitforspawnedpromote;
-    }
-
-    cold_compaction_args.this = this;
-    cold_compaction_args.brick_list = &bricklist_cold;
-    cold_compaction_args.defrag = defrag;
-    cold_compaction_args.is_promotion = _gf_false;
-    cold_compaction_args.is_compaction = _gf_true;
-    cold_compaction_args.is_hot_tier = _gf_false;
-
-    ret = gf_thread_create(&cold_compact_thread, NULL, &tier_run,
-                           &cold_compaction_args, "tierccom");
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Failed to start compaction thread.");
-        defrag->defrag_status = GF_DEFRAG_STATUS_FAILED;
-        goto waitforspawnedhotcompact;
-    }
-    pthread_join(cold_compact_thread, NULL);
-
-waitforspawnedhotcompact:
-    pthread_join(hot_compact_thread, NULL);
-
-waitforspawnedpromote:
-    pthread_join(promote_thread, NULL);
-
-waitforspawned:
-    pthread_join(demote_thread, NULL);
-
-cleanup:
-    clear_bricklist(&bricklist_cold);
-    clear_bricklist(&bricklist_hot);
-    return ret;
-}
-
-int32_t
-tier_migration_needed(xlator_t *this)
-{
-    gf_defrag_info_t *defrag = NULL;
-    dht_conf_t *conf = NULL;
-    int ret = 0;
-
-    conf = this->private;
-
-    GF_VALIDATE_OR_GOTO(this->name, conf, out);
-    GF_VALIDATE_OR_GOTO(this->name, conf->defrag, out);
-
-    defrag = conf->defrag;
-
-    if ((defrag->cmd == GF_DEFRAG_CMD_START_TIER) ||
-        (defrag->cmd == GF_DEFRAG_CMD_START_DETACH_TIER))
-        ret = 1;
-out:
-    return ret;
-}
-
-int32_t
-tier_migration_get_dst(xlator_t *this, dht_local_t *local)
-{
-    dht_conf_t *conf = NULL;
-    int32_t ret = -1;
-    gf_defrag_info_t *defrag = NULL;
-
-    GF_VALIDATE_OR_GOTO("tier", this, out);
-    GF_VALIDATE_OR_GOTO(this->name, this->private, out);
-
-    conf = this->private;
-
-    defrag = conf->defrag;
-
-    if (defrag && defrag->cmd == GF_DEFRAG_CMD_START_DETACH_TIER) {
-        local->rebalance.target_node = conf->subvolumes[0];
-
-    } else if (conf->subvolumes[0] == local->cached_subvol)
-        local->rebalance.target_node = conf->subvolumes[1];
-    else
-        local->rebalance.target_node = conf->subvolumes[0];
-
-    if (local->rebalance.target_node)
-        ret = 0;
-
-out:
-    return ret;
-}
-
-xlator_t *
-tier_search(xlator_t *this, dht_layout_t *layout, const char *name)
-{
-    xlator_t *subvol = NULL;
-    dht_conf_t *conf = NULL;
-
-    GF_VALIDATE_OR_GOTO("tier", this, out);
-    GF_VALIDATE_OR_GOTO(this->name, this->private, out);
-
-    conf = this->private;
-
-    subvol = TIER_HASHED_SUBVOL;
-
-out:
-    return subvol;
-}
-
-static int
-tier_load_externals(xlator_t *this)
-{
-    int ret = -1;
-    char *libpathfull = (LIBDIR "/libgfdb.so.0");
-    get_gfdb_methods_t get_gfdb_methods;
-
-    GF_VALIDATE_OR_GOTO("this", this, out);
-
-    libhandle = dlopen(libpathfull, RTLD_NOW);
-    if (!libhandle) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Error loading libgfdb.so %s\n", dlerror());
-        ret = -1;
-        goto out;
-    }
-
-    get_gfdb_methods = dlsym(libhandle, "get_gfdb_methods");
-    if (!get_gfdb_methods) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Error loading get_gfdb_methods()");
-        ret = -1;
-        goto out;
-    }
-
-    get_gfdb_methods(&gfdb_methods);
-
-    ret = 0;
-
-out:
-    if (ret && libhandle)
-        dlclose(libhandle);
-
-    return ret;
-}
-
-static tier_mode_t
-tier_validate_mode(char *mode)
-{
-    int ret = -1;
-
-    if (strcmp(mode, "test") == 0) {
-        ret = TIER_MODE_TEST;
-    } else {
-        ret = TIER_MODE_WM;
-    }
-
-    return ret;
-}
-
-static gf_boolean_t
-tier_validate_compact_mode(char *mode)
-{
-    gf_boolean_t ret = _gf_false;
-
-    gf_msg("tier", GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-           "tier_validate_compact_mode: mode = %s", mode);
-
-    if (!strcmp(mode, "on")) {
-        ret = _gf_true;
-    } else {
-        ret = _gf_false;
-    }
-
-    gf_msg("tier", GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_STATUS,
-           "tier_validate_compact_mode: ret = %i", ret);
-
-    return ret;
-}
-
-int
-tier_init_methods(xlator_t *this)
-{
-    int ret = -1;
-    dht_conf_t *conf = NULL;
-    dht_methods_t *methods = NULL;
-
-    GF_VALIDATE_OR_GOTO("tier", this, err);
-
-    conf = this->private;
-
-    methods = &(conf->methods);
-
-    methods->migration_get_dst_subvol = tier_migration_get_dst;
-    methods->migration_other = tier_start;
-    methods->migration_needed = tier_migration_needed;
-    methods->layout_search = tier_search;
-
-    ret = 0;
-err:
-    return ret;
-}
-
-static void
-tier_save_vol_name(xlator_t *this)
-{
-    dht_conf_t *conf = NULL;
-    gf_defrag_info_t *defrag = NULL;
-    char *suffix = NULL;
-    int name_len = 0;
-
-    conf = this->private;
-    defrag = conf->defrag;
-
-    suffix = strstr(this->name, "-tier-dht");
-
-    if (suffix)
-        name_len = suffix - this->name;
-    else
-        name_len = strlen(this->name);
-
-    if (name_len > GD_VOLUME_NAME_MAX)
-        name_len = GD_VOLUME_NAME_MAX;
-
-    strncpy(defrag->tier_conf.volname, this->name, name_len);
-    defrag->tier_conf.volname[name_len] = 0;
-}
-
-int
-tier_init(xlator_t *this)
-{
-    int ret = -1;
-    int freq = 0;
-    int maxsize = 0;
-    dht_conf_t *conf = NULL;
-    gf_defrag_info_t *defrag = NULL;
-    char *voldir = NULL;
-    char *mode = NULL;
-    char *paused = NULL;
-    tier_mode_t tier_mode = DEFAULT_TIER_MODE;
-    gf_boolean_t compact_mode = _gf_false;
-
-    ret = dht_init(this);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "tier_init failed");
-        goto out;
-    }
-
-    conf = this->private;
-
-    ret = tier_init_methods(this);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "tier_init_methods failed");
-        goto out;
-    }
-
-    if (conf->subvolume_cnt != 2) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Invalid number of subvolumes %d", conf->subvolume_cnt);
-        goto out;
-    }
-
-    /* if instatiated from client side initialization is complete. */
-    if (!conf->defrag) {
-        ret = 0;
-        goto out;
-    }
-
-    /* if instatiated from server side, load db libraries */
-    ret = tier_load_externals(this);
-    if (ret) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "Could not load externals. Aborting");
-        goto out;
-    }
-
-    defrag = conf->defrag;
-
-    defrag->tier_conf.last_demote_qfile_index = 0;
-    defrag->tier_conf.last_promote_qfile_index = 0;
-
-    defrag->tier_conf.is_tier = 1;
-    defrag->this = this;
-
-    ret = dict_get_int32(this->options, "tier-max-promote-file-size", &maxsize);
-    if (ret) {
-        maxsize = 0;
-    }
-
-    defrag->tier_conf.tier_max_promote_size = maxsize;
-
-    ret = dict_get_int32(this->options, "tier-promote-frequency", &freq);
-    if (ret) {
-        freq = DEFAULT_PROMOTE_FREQ_SEC;
-    }
-
-    defrag->tier_conf.tier_promote_frequency = freq;
-
-    ret = dict_get_int32(this->options, "tier-demote-frequency", &freq);
-    if (ret) {
-        freq = DEFAULT_DEMOTE_FREQ_SEC;
-    }
-
-    defrag->tier_conf.tier_demote_frequency = freq;
-
-    ret = dict_get_int32(this->options, "tier-hot-compact-frequency", &freq);
-    if (ret) {
-        freq = DEFAULT_HOT_COMPACT_FREQ_SEC;
-    }
-
-    defrag->tier_conf.tier_compact_hot_frequency = freq;
-
-    ret = dict_get_int32(this->options, "tier-cold-compact-frequency", &freq);
-    if (ret) {
-        freq = DEFAULT_COLD_COMPACT_FREQ_SEC;
-    }
-
-    defrag->tier_conf.tier_compact_cold_frequency = freq;
-
-    ret = dict_get_int32(this->options, "watermark-hi", &freq);
-    if (ret) {
-        freq = DEFAULT_WM_HI;
-    }
-
-    defrag->tier_conf.watermark_hi = freq;
-
-    ret = dict_get_int32(this->options, "watermark-low", &freq);
-    if (ret) {
-        freq = DEFAULT_WM_LOW;
-    }
-
-    defrag->tier_conf.watermark_low = freq;
-
-    ret = dict_get_int32(this->options, "write-freq-threshold", &freq);
-    if (ret) {
-        freq = DEFAULT_WRITE_FREQ_SEC;
-    }
-
-    defrag->write_freq_threshold = freq;
-
-    ret = dict_get_int32(this->options, "read-freq-threshold", &freq);
-    if (ret) {
-        freq = DEFAULT_READ_FREQ_SEC;
-    }
-
-    defrag->read_freq_threshold = freq;
-
-    ret = dict_get_int32(this->options, "tier-max-mb", &freq);
-    if (ret) {
-        freq = DEFAULT_TIER_MAX_MIGRATE_MB;
-    }
-
-    defrag->tier_conf.max_migrate_bytes = (uint64_t)freq * 1024 * 1024;
-
-    ret = dict_get_int32(this->options, "tier-max-files", &freq);
-    if (ret) {
-        freq = DEFAULT_TIER_MAX_MIGRATE_FILES;
-    }
-
-    defrag->tier_conf.max_migrate_files = freq;
-
-    ret = dict_get_int32(this->options, "tier-query-limit",
-                         &(defrag->tier_conf.query_limit));
-    if (ret) {
-        defrag->tier_conf.query_limit = DEFAULT_TIER_QUERY_LIMIT;
-    }
-
-    ret = dict_get_str(this->options, "tier-compact", &mode);
-
-    if (ret) {
-        defrag->tier_conf.compact_active = DEFAULT_COMP_MODE;
-    } else {
-        compact_mode = tier_validate_compact_mode(mode);
-        /* If compaction is now active, we need to inform the bricks on
-           the hot and cold tier of this. See dht-common.h for more. */
-        defrag->tier_conf.compact_active = compact_mode;
-        if (compact_mode) {
-            defrag->tier_conf.compact_mode_switched_hot = _gf_true;
-            defrag->tier_conf.compact_mode_switched_cold = _gf_true;
-        }
-    }
-
-    ret = dict_get_str(this->options, "tier-mode", &mode);
-    if (ret) {
-        defrag->tier_conf.mode = DEFAULT_TIER_MODE;
-    } else {
-        tier_mode = tier_validate_mode(mode);
-        defrag->tier_conf.mode = tier_mode;
-    }
-
-    pthread_mutex_init(&defrag->tier_conf.pause_mutex, 0);
-
-    gf_defrag_set_pause_state(&defrag->tier_conf, TIER_RUNNING);
-
-    ret = dict_get_str(this->options, "tier-pause", &paused);
-
-    if (paused && strcmp(paused, "on") == 0)
-        gf_defrag_set_pause_state(&defrag->tier_conf, TIER_REQUEST_PAUSE);
-
-    ret = gf_asprintf(&voldir, "%s/%s", DEFAULT_VAR_RUN_DIRECTORY, this->name);
-    if (ret < 0)
-        goto out;
-
-    ret = mkdir_p(voldir, 0777, _gf_true);
-    if (ret == -1 && errno != EEXIST) {
-        gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-               "tier_init failed");
-
-        GF_FREE(voldir);
-        goto out;
-    }
-
-    GF_FREE(voldir);
-
-    ret = gf_asprintf(&promotion_qfile, "%s/%s/promote",
-                      DEFAULT_VAR_RUN_DIRECTORY, this->name);
-    if (ret < 0)
-        goto out;
-
-    ret = gf_asprintf(&demotion_qfile, "%s/%s/demote",
-                      DEFAULT_VAR_RUN_DIRECTORY, this->name);
-    if (ret < 0) {
-        GF_FREE(promotion_qfile);
-        goto out;
-    }
-
-    gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-           "Promote/demote frequency %d/%d "
-           "Write/Read freq thresholds %d/%d",
-           defrag->tier_conf.tier_promote_frequency,
-           defrag->tier_conf.tier_demote_frequency,
-           defrag->write_freq_threshold, defrag->read_freq_threshold);
-
-    tier_save_vol_name(this);
-
-    ret = 0;
-
-out:
-
-    return ret;
-}
-
-int
-tier_cli_pause_done(int op_ret, call_frame_t *sync_frame, void *data)
-{
-    gf_msg("tier", GF_LOG_INFO, 0, DHT_MSG_TIER_PAUSED,
-           "Migrate file paused with op_ret %d", op_ret);
-
-    return op_ret;
-}
-
-int
-tier_cli_pause(void *data)
-{
-    gf_defrag_info_t *defrag = NULL;
-    xlator_t *this = NULL;
-    dht_conf_t *conf = NULL;
-    int ret = -1;
-
-    this = data;
-
-    conf = this->private;
-    GF_VALIDATE_OR_GOTO(this->name, conf, exit);
-
-    defrag = conf->defrag;
-    GF_VALIDATE_OR_GOTO(this->name, defrag, exit);
-
-    gf_defrag_pause_tier(this, defrag);
-
-    ret = 0;
-exit:
-    return ret;
-}
-
-int
-tier_reconfigure(xlator_t *this, dict_t *options)
-{
-    dht_conf_t *conf = NULL;
-    gf_defrag_info_t *defrag = NULL;
-    char *mode = NULL;
-    int migrate_mb = 0;
-    gf_boolean_t req_pause = _gf_false;
-    int ret = 0;
-    call_frame_t *frame = NULL;
-    gf_boolean_t last_compact_setting = _gf_false;
-
-    conf = this->private;
-
-    if (conf->defrag) {
-        defrag = conf->defrag;
-        GF_OPTION_RECONF("tier-max-promote-file-size",
-                         defrag->tier_conf.tier_max_promote_size, options,
-                         int32, out);
-
-        GF_OPTION_RECONF("tier-promote-frequency",
-                         defrag->tier_conf.tier_promote_frequency, options,
-                         int32, out);
-
-        GF_OPTION_RECONF("tier-demote-frequency",
-                         defrag->tier_conf.tier_demote_frequency, options,
-                         int32, out);
-
-        GF_OPTION_RECONF("write-freq-threshold", defrag->write_freq_threshold,
-                         options, int32, out);
-
-        GF_OPTION_RECONF("read-freq-threshold", defrag->read_freq_threshold,
-                         options, int32, out);
-
-        GF_OPTION_RECONF("watermark-hi", defrag->tier_conf.watermark_hi,
-                         options, int32, out);
-
-        GF_OPTION_RECONF("watermark-low", defrag->tier_conf.watermark_low,
-                         options, int32, out);
-
-        last_compact_setting = defrag->tier_conf.compact_active;
-
-        GF_OPTION_RECONF("tier-compact", defrag->tier_conf.compact_active,
-                         options, bool, out);
-
-        if (last_compact_setting != defrag->tier_conf.compact_active) {
-            defrag->tier_conf.compact_mode_switched_hot = _gf_true;
-            defrag->tier_conf.compact_mode_switched_cold = _gf_true;
-            gf_msg(this->name, GF_LOG_INFO, 0, DHT_MSG_LOG_TIER_STATUS,
-                   "compact mode switched");
-        }
-
-        GF_OPTION_RECONF("tier-hot-compact-frequency",
-                         defrag->tier_conf.tier_compact_hot_frequency, options,
-                         int32, out);
-
-        GF_OPTION_RECONF("tier-cold-compact-frequency",
-                         defrag->tier_conf.tier_compact_cold_frequency, options,
-                         int32, out);
-
-        GF_OPTION_RECONF("tier-mode", mode, options, str, out);
-        defrag->tier_conf.mode = tier_validate_mode(mode);
-
-        GF_OPTION_RECONF("tier-max-mb", migrate_mb, options, int32, out);
-        defrag->tier_conf.max_migrate_bytes = (uint64_t)migrate_mb * 1024 *
-                                              1024;
-
-        GF_OPTION_RECONF("tier-max-files", defrag->tier_conf.max_migrate_files,
-                         options, int32, out);
-
-        GF_OPTION_RECONF("tier-query-limit", defrag->tier_conf.query_limit,
-                         options, int32, out);
-
-        GF_OPTION_RECONF("tier-pause", req_pause, options, bool, out);
-
-        if (req_pause == _gf_true) {
-            frame = create_frame(this, this->ctx->pool);
-            if (!frame)
-                goto out;
-
-            frame->root->pid = GF_CLIENT_PID_DEFRAG;
-
-            ret = synctask_new(this->ctx->env, tier_cli_pause,
-                               tier_cli_pause_done, frame, this);
-
-            if (ret) {
-                gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                       "pause tier failed on reconfigure");
-            }
-        } else {
-            ret = gf_defrag_resume_tier(this, defrag);
-            if (ret) {
-                gf_msg(this->name, GF_LOG_ERROR, 0, DHT_MSG_LOG_TIER_ERROR,
-                       "resume tier failed on reconfigure");
-            }
-        }
-    }
-
-out:
-    return dht_reconfigure(this, options);
-}
-
-void
-tier_fini(xlator_t *this)
-{
-    if (libhandle)
-        dlclose(libhandle);
-
-    GF_FREE(demotion_qfile);
-    GF_FREE(promotion_qfile);
-
-    dht_fini(this);
-}
-
-class_methods_t class_methods = {.init = tier_init,
-                                 .fini = tier_fini,
-                                 .reconfigure = tier_reconfigure,
-                                 .notify = dht_notify};
-
-struct xlator_fops fops = {
-
-    .lookup = dht_lookup,
-    .create = tier_create,
-    .mknod = dht_mknod,
-
-    .open = dht_open,
-    .statfs = tier_statfs,
-    .opendir = dht_opendir,
-    .readdir = tier_readdir,
-    .readdirp = tier_readdirp,
-    .fsyncdir = dht_fsyncdir,
-    .symlink = dht_symlink,
-    .unlink = tier_unlink,
-    .link = tier_link,
-    .mkdir = dht_mkdir,
-    .rmdir = dht_rmdir,
-    .rename = dht_rename,
-    .entrylk = dht_entrylk,
-    .fentrylk = dht_fentrylk,
-
-    /* Inode read operations */
-    .stat = dht_stat,
-    .fstat = dht_fstat,
-    .access = dht_access,
-    .readlink = dht_readlink,
-    .getxattr = dht_getxattr,
-    .fgetxattr = dht_fgetxattr,
-    .readv = dht_readv,
-    .flush = dht_flush,
-    .fsync = dht_fsync,
-    .inodelk = dht_inodelk,
-    .finodelk = dht_finodelk,
-    .lk = dht_lk,
-
-    /* Inode write operations */
-    .fremovexattr = dht_fremovexattr,
-    .removexattr = dht_removexattr,
-    .setxattr = dht_setxattr,
-    .fsetxattr = dht_fsetxattr,
-    .truncate = dht_truncate,
-    .ftruncate = dht_ftruncate,
-    .writev = dht_writev,
-    .xattrop = dht_xattrop,
-    .fxattrop = dht_fxattrop,
-    .setattr = dht_setattr,
-    .fsetattr = dht_fsetattr,
-    .fallocate = dht_fallocate,
-    .discard = dht_discard,
-    .zerofill = dht_zerofill,
-};
-
-struct xlator_cbks cbks = {.release = dht_release, .forget = dht_forget};
diff --git a/xlators/cluster/dht/src/tier.h b/xlators/cluster/dht/src/tier.h
deleted file mode 100644
index a20b1db07e0..00000000000
--- a/xlators/cluster/dht/src/tier.h
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
-  Copyright (c) 2015 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef _TIER_H_
-#define _TIER_H_
-
-/******************************************************************************/
-/* This is from dht-rebalancer.c as we don't have dht-rebalancer.h */
-#include "dht-common.h"
-#include <glusterfs/xlator.h>
-#include <signal.h>
-#include <fnmatch.h>
-#include <signal.h>
-
-/*
- * Size of timer wheel. We would not promote or demote less
- * frequently than this number.
- */
-#define TIMER_SECS 3600
-
-#include "gfdb_data_store.h"
-#include <ctype.h>
-#include <sys/stat.h>
-
-#define PROMOTION_QFILE "promotequeryfile"
-#define DEMOTION_QFILE "demotequeryfile"
-
-#define TIER_HASHED_SUBVOL conf->subvolumes[0]
-#define TIER_UNHASHED_SUBVOL conf->subvolumes[1]
-
-#define GET_QFILE_PATH(is_promotion)                                           \
-    (is_promotion) ? promotion_qfile : demotion_qfile
-
-typedef struct tier_qfile_array {
-    int *fd_array;
-    ssize_t array_size;
-    ssize_t next_index;
-    /* Indicate the number of exhuasted FDs*/
-    ssize_t exhausted_count;
-} tier_qfile_array_t;
-
-typedef struct _query_cbk_args {
-    xlator_t *this;
-    gf_defrag_info_t *defrag;
-    /* This is write */
-    int query_fd;
-    int is_promotion;
-    int is_compaction;
-    /* This is for read */
-    tier_qfile_array_t *qfile_array;
-} query_cbk_args_t;
-
-int
-gf_run_tier(xlator_t *this, gf_defrag_info_t *defrag);
-
-typedef struct gfdb_brick_info {
-    gfdb_time_t *time_stamp;
-    gf_boolean_t _gfdb_promote;
-    query_cbk_args_t *_query_cbk_args;
-} gfdb_brick_info_t;
-
-typedef struct brick_list {
-    xlator_t *xlator;
-    char *brick_db_path;
-    char brick_name[NAME_MAX];
-    char qfile_path[PATH_MAX];
-    struct list_head list;
-} tier_brick_list_t;
-
-typedef struct _dm_thread_args {
-    xlator_t *this;
-    gf_defrag_info_t *defrag;
-    struct list_head *brick_list;
-    int freq_time;
-    int return_value;
-    int is_promotion;
-    int is_compaction;
-    gf_boolean_t is_hot_tier;
-} migration_args_t;
-
-typedef enum tier_watermark_op_ {
-    TIER_WM_NONE = 0,
-    TIER_WM_LOW,
-    TIER_WM_HI,
-    TIER_WM_MID
-} tier_watermark_op_t;
-
-#define DEFAULT_PROMOTE_FREQ_SEC 120
-#define DEFAULT_DEMOTE_FREQ_SEC 120
-#define DEFAULT_HOT_COMPACT_FREQ_SEC 604800
-#define DEFAULT_COLD_COMPACT_FREQ_SEC 604800
-#define DEFAULT_DEMOTE_DEGRADED 1
-#define DEFAULT_WRITE_FREQ_SEC 0
-#define DEFAULT_READ_FREQ_SEC 0
-#define DEFAULT_WM_LOW 75
-#define DEFAULT_WM_HI 90
-#define DEFAULT_TIER_MODE TIER_MODE_TEST
-#define DEFAULT_COMP_MODE _gf_true
-#define DEFAULT_TIER_MAX_MIGRATE_MB 1000
-#define DEFAULT_TIER_MAX_MIGRATE_FILES 5000
-#define DEFAULT_TIER_QUERY_LIMIT 100
-
-#endif
diff --git a/xlators/cluster/dht/src/tier.sym b/xlators/cluster/dht/src/tier.sym
deleted file mode 100644
index 60205d145b6..00000000000
--- a/xlators/cluster/dht/src/tier.sym
+++ /dev/null
@@ -1,9 +0,0 @@
-fops
-cbks
-class_methods
-dht_methods
-tier_methods
-options
-mem_acct_init
-reconfigure
-dumpops
diff --git a/xlators/cluster/stripe/Makefile.am b/xlators/cluster/stripe/Makefile.am
deleted file mode 100644
index d471a3f9243..00000000000
--- a/xlators/cluster/stripe/Makefile.am
+++ /dev/null
@@ -1,3 +0,0 @@
-SUBDIRS = src
-
-CLEANFILES = 
diff --git a/xlators/cluster/stripe/src/Makefile.am b/xlators/cluster/stripe/src/Makefile.am
deleted file mode 100644
index 2b594567db1..00000000000
--- a/xlators/cluster/stripe/src/Makefile.am
+++ /dev/null
@@ -1,22 +0,0 @@
-xlator_LTLIBRARIES = stripe.la
-xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/cluster
-
-stripe_la_LDFLAGS = -module $(GF_XLATOR_DEFAULT_LDFLAGS)
-
-
-stripe_la_SOURCES = stripe.c stripe-helpers.c \
-	$(top_builddir)/xlators/lib/src/libxlator.c
-
-stripe_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
-
-noinst_HEADERS = stripe.h stripe-mem-types.h \
-	$(top_builddir)/xlators/lib/src/libxlator.h
-
-AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src \
-	-I$(top_srcdir)/xlators/lib/src \
-	-I$(top_srcdir)/rpc/xdr/src -I$(top_builddir)/rpc/xdr/src
-
-AM_CFLAGS = -Wall $(GF_CFLAGS)
-
-CLEANFILES = 
-
diff --git a/xlators/cluster/stripe/src/stripe-helpers.c b/xlators/cluster/stripe/src/stripe-helpers.c
deleted file mode 100644
index 35342378985..00000000000
--- a/xlators/cluster/stripe/src/stripe-helpers.c
+++ /dev/null
@@ -1,658 +0,0 @@
-/*
-  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#include <fnmatch.h>
-
-#include "stripe.h"
-#include <glusterfs/byte-order.h>
-#include <glusterfs/mem-types.h>
-#include <glusterfs/logging.h>
-
-void
-stripe_local_wipe(stripe_local_t *local)
-{
-    if (!local)
-        goto out;
-
-    loc_wipe(&local->loc);
-    loc_wipe(&local->loc2);
-
-    if (local->fd)
-        fd_unref(local->fd);
-
-    if (local->inode)
-        inode_unref(local->inode);
-
-    if (local->xattr)
-        dict_unref(local->xattr);
-
-    if (local->xdata)
-        dict_unref(local->xdata);
-
-out:
-    return;
-}
-
-int
-stripe_aggregate(dict_t *this, char *key, data_t *value, void *data)
-{
-    dict_t *dst = NULL;
-    int64_t *ptr = 0, *size = NULL;
-    int32_t ret = -1;
-
-    dst = data;
-
-    if (strcmp(key, QUOTA_SIZE_KEY) == 0) {
-        ret = dict_get_bin(dst, key, (void **)&size);
-        if (ret < 0) {
-            size = GF_CALLOC(1, sizeof(int64_t), gf_common_mt_char);
-            if (size == NULL) {
-                gf_log("stripe", GF_LOG_WARNING, "memory allocation failed");
-                goto out;
-            }
-            ret = dict_set_bin(dst, key, size, sizeof(int64_t));
-            if (ret < 0) {
-                gf_log("stripe", GF_LOG_WARNING,
-                       "stripe aggregate dict set failed");
-                GF_FREE(size);
-                goto out;
-            }
-        }
-
-        ptr = data_to_bin(value);
-        if (ptr == NULL) {
-            gf_log("stripe", GF_LOG_WARNING, "data to bin failed");
-            goto out;
-        }
-
-        *size = hton64(ntoh64(*size) + ntoh64(*ptr));
-    } else if (strcmp(key, GF_CONTENT_KEY)) {
-        /* No need to aggregate 'CONTENT' data */
-        ret = dict_set(dst, key, value);
-        if (ret)
-            gf_log("stripe", GF_LOG_WARNING, "xattr dict set failed");
-    }
-
-out:
-    return 0;
-}
-
-void
-stripe_aggregate_xattr(dict_t *dst, dict_t *src)
-{
-    if ((dst == NULL) || (src == NULL)) {
-        goto out;
-    }
-
-    dict_foreach(src, stripe_aggregate, dst);
-out:
-    return;
-}
-
-int32_t
-stripe_xattr_aggregate(char *buffer, stripe_local_t *local, int32_t *total)
-{
-    int32_t i = 0;
-    int32_t ret = -1;
-    int32_t len = 0;
-    char *sbuf = NULL;
-    stripe_xattr_sort_t *xattr = NULL;
-
-    if (!buffer || !local || !local->xattr_list)
-        goto out;
-
-    sbuf = buffer;
-
-    for (i = 0; i < local->nallocs; i++) {
-        xattr = local->xattr_list + i;
-        len = xattr->xattr_len - 1; /* length includes \0 */
-
-        if (len && xattr && xattr->xattr_value) {
-            memcpy(buffer, xattr->xattr_value, len);
-            buffer += len;
-            *buffer++ = ' ';
-        }
-    }
-
-    *--buffer = '\0';
-    if (total)
-        *total = buffer - sbuf;
-    ret = 0;
-
-out:
-    return ret;
-}
-
-int32_t
-stripe_free_xattr_str(stripe_local_t *local)
-{
-    int32_t i = 0;
-    int32_t ret = -1;
-    stripe_xattr_sort_t *xattr = NULL;
-
-    if (!local || !local->xattr_list)
-        goto out;
-
-    for (i = 0; i < local->nallocs; i++) {
-        xattr = local->xattr_list + i;
-
-        if (xattr && xattr->xattr_value)
-            GF_FREE(xattr->xattr_value);
-    }
-
-    ret = 0;
-out:
-    return ret;
-}
-
-int32_t
-stripe_fill_lockinfo_xattr(xlator_t *this, stripe_local_t *local,
-                           void **xattr_serz)
-{
-    int32_t ret = -1, i = 0, len = 0;
-    dict_t *tmp1 = NULL, *tmp2 = NULL;
-    char *buf = NULL;
-    stripe_xattr_sort_t *xattr = NULL;
-
-    if (xattr_serz == NULL) {
-        goto out;
-    }
-
-    tmp2 = dict_new();
-
-    if (tmp2 == NULL) {
-        goto out;
-    }
-
-    for (i = 0; i < local->nallocs; i++) {
-        xattr = local->xattr_list + i;
-        len = xattr->xattr_len;
-
-        if (len && xattr && xattr->xattr_value) {
-            ret = dict_reset(tmp2);
-            if (ret < 0) {
-                gf_log(this->name, GF_LOG_DEBUG, "dict_reset failed (%s)",
-                       strerror(-ret));
-            }
-
-            ret = dict_unserialize(xattr->xattr_value, xattr->xattr_len, &tmp2);
-            if (ret < 0) {
-                gf_log(this->name, GF_LOG_WARNING,
-                       "dict_unserialize failed (%s)", strerror(-ret));
-                ret = -1;
-                goto out;
-            }
-
-            tmp1 = dict_copy(tmp2, tmp1);
-            if (tmp1 == NULL) {
-                gf_log(this->name, GF_LOG_WARNING, "dict_copy failed (%s)",
-                       strerror(-ret));
-                ret = -1;
-                goto out;
-            }
-        }
-    }
-
-    len = dict_serialized_length(tmp1);
-    if (len > 0) {
-        buf = GF_CALLOC(1, len, gf_common_mt_dict_t);
-        if (buf == NULL) {
-            ret = -1;
-            goto out;
-        }
-
-        ret = dict_serialize(tmp1, buf);
-        if (ret < 0) {
-            gf_log(this->name, GF_LOG_WARNING, "dict_serialize failed (%s)",
-                   strerror(-ret));
-            GF_FREE(buf);
-            ret = -1;
-            goto out;
-        }
-
-        *xattr_serz = buf;
-    }
-
-    ret = 0;
-out:
-    if (tmp1 != NULL) {
-        dict_unref(tmp1);
-    }
-
-    if (tmp2 != NULL) {
-        dict_unref(tmp2);
-    }
-
-    return ret;
-}
-
-int32_t
-stripe_fill_pathinfo_xattr(xlator_t *this, stripe_local_t *local,
-                           char **xattr_serz)
-{
-    int ret = -1;
-    int32_t padding = 0;
-    int32_t tlen = 0;
-    int len = 0;
-    char stripe_size_str[20] = {
-        0,
-    };
-    char *pathinfo_serz = NULL;
-
-    if (!local) {
-        gf_log(this->name, GF_LOG_ERROR, "Possible NULL deref");
-        goto out;
-    }
-
-    len = snprintf(stripe_size_str, sizeof(stripe_size_str), "%" PRId64,
-                   local->fctx ? local->fctx->stripe_size : 0);
-    if (len < 0 || len >= sizeof(stripe_size_str))
-        goto out;
-    /* extra bytes for decorations (brackets and <>'s) */
-    padding = strlen(this->name) + SLEN(STRIPE_PATHINFO_HEADER) + len + 7;
-    local->xattr_total_len += (padding + 2);
-
-    pathinfo_serz = GF_MALLOC(local->xattr_total_len, gf_common_mt_char);
-    if (!pathinfo_serz)
-        goto out;
-
-    /* xlator info */
-    (void)sprintf(pathinfo_serz, "(<" STRIPE_PATHINFO_HEADER "%s:[%s]> ",
-                  this->name, stripe_size_str);
-
-    ret = stripe_xattr_aggregate(pathinfo_serz + padding, local, &tlen);
-    if (ret) {
-        gf_log(this->name, GF_LOG_ERROR, "Cannot aggregate pathinfo list");
-        GF_FREE(pathinfo_serz);
-        goto out;
-    }
-
-    *(pathinfo_serz + padding + tlen) = ')';
-    *(pathinfo_serz + padding + tlen + 1) = '\0';
-
-    *xattr_serz = pathinfo_serz;
-
-    ret = 0;
-out:
-    return ret;
-}
-
-/**
- * stripe_get_matching_bs - Get the matching block size for the given path.
- */
-int32_t
-stripe_get_matching_bs(const char *path, stripe_private_t *priv)
-{
-    struct stripe_options *trav = NULL;
-    uint64_t block_size = 0;
-
-    GF_VALIDATE_OR_GOTO("stripe", priv, out);
-    GF_VALIDATE_OR_GOTO("stripe", path, out);
-
-    LOCK(&priv->lock);
-    {
-        block_size = priv->block_size;
-        trav = priv->pattern;
-        while (trav) {
-            if (!fnmatch(trav->path_pattern, path, FNM_NOESCAPE)) {
-                block_size = trav->block_size;
-                break;
-            }
-            trav = trav->next;
-        }
-    }
-    UNLOCK(&priv->lock);
-
-out:
-    return block_size;
-}
-
-int32_t
-stripe_ctx_handle(xlator_t *this, call_frame_t *prev, stripe_local_t *local,
-                  dict_t *dict)
-{
-    char key[256] = {
-        0,
-    };
-    data_t *data = NULL;
-    int32_t index = 0;
-    stripe_private_t *priv = NULL;
-
-    priv = this->private;
-
-    if (!local->fctx) {
-        local->fctx = GF_CALLOC(1, sizeof(stripe_fd_ctx_t),
-                                gf_stripe_mt_stripe_fd_ctx_t);
-        if (!local->fctx) {
-            local->op_errno = ENOMEM;
-            local->op_ret = -1;
-            goto out;
-        }
-
-        local->fctx->static_array = 0;
-    }
-    /* Stripe block size */
-    sprintf(key, "trusted.%s.stripe-size", this->name);
-    data = dict_get(dict, key);
-    if (!data) {
-        local->xattr_self_heal_needed = 1;
-        gf_log(this->name, GF_LOG_ERROR, "Failed to get stripe-size");
-        goto out;
-    } else {
-        if (!local->fctx->stripe_size) {
-            local->fctx->stripe_size = data_to_int64(data);
-        }
-
-        if (local->fctx->stripe_size != data_to_int64(data)) {
-            gf_log(this->name, GF_LOG_WARNING,
-                   "stripe-size mismatch in blocks");
-            local->xattr_self_heal_needed = 1;
-        }
-    }
-
-    /* Stripe count */
-    sprintf(key, "trusted.%s.stripe-count", this->name);
-    data = dict_get(dict, key);
-
-    if (!data) {
-        local->xattr_self_heal_needed = 1;
-        gf_log(this->name, GF_LOG_ERROR, "Failed to get stripe-count");
-        goto out;
-    }
-    if (!local->fctx->xl_array) {
-        local->fctx->stripe_count = data_to_int32(data);
-        if (!local->fctx->stripe_count) {
-            gf_log(this->name, GF_LOG_ERROR, "error with stripe-count xattr");
-            local->op_ret = -1;
-            local->op_errno = EIO;
-            goto out;
-        }
-
-        local->fctx->xl_array = GF_CALLOC(local->fctx->stripe_count,
-                                          sizeof(xlator_t *),
-                                          gf_stripe_mt_xlator_t);
-
-        if (!local->fctx->xl_array) {
-            local->op_errno = ENOMEM;
-            local->op_ret = -1;
-            goto out;
-        }
-    }
-    if (local->fctx->stripe_count != data_to_int32(data)) {
-        gf_log(this->name, GF_LOG_ERROR,
-               "error with stripe-count xattr (%d != %d)",
-               local->fctx->stripe_count, data_to_int32(data));
-        local->op_ret = -1;
-        local->op_errno = EIO;
-        goto out;
-    }
-
-    /* index */
-    sprintf(key, "trusted.%s.stripe-index", this->name);
-    data = dict_get(dict, key);
-    if (!data) {
-        local->xattr_self_heal_needed = 1;
-        gf_log(this->name, GF_LOG_ERROR, "Failed to get stripe-index");
-        goto out;
-    }
-    index = data_to_int32(data);
-    if (index > priv->child_count) {
-        gf_log(this->name, GF_LOG_ERROR, "error with stripe-index xattr (%d)",
-               index);
-        local->op_ret = -1;
-        local->op_errno = EIO;
-        goto out;
-    }
-    if (local->fctx->xl_array) {
-        if (!local->fctx->xl_array[index])
-            local->fctx->xl_array[index] = prev->this;
-    }
-
-    sprintf(key, "trusted.%s.stripe-coalesce", this->name);
-    data = dict_get(dict, key);
-    if (!data) {
-        /*
-         * The file was probably created prior to coalesce support.
-         * Assume non-coalesce mode for this file to maintain backwards
-         * compatibility.
-         */
-        gf_log(this->name, GF_LOG_DEBUG,
-               "missing stripe-coalesce "
-               "attr, assume non-coalesce mode");
-        local->fctx->stripe_coalesce = 0;
-    } else {
-        local->fctx->stripe_coalesce = data_to_int32(data);
-    }
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_xattr_request_build(xlator_t *this, dict_t *dict, uint64_t stripe_size,
-                           uint32_t stripe_count, uint32_t stripe_index,
-                           uint32_t stripe_coalesce)
-{
-    char key[256] = {
-        0,
-    };
-    int32_t ret = -1;
-
-    sprintf(key, "trusted.%s.stripe-size", this->name);
-    ret = dict_set_int64(dict, key, stripe_size);
-    if (ret) {
-        gf_log(this->name, GF_LOG_WARNING, "failed to set %s in xattr_req dict",
-               key);
-        goto out;
-    }
-
-    sprintf(key, "trusted.%s.stripe-count", this->name);
-    ret = dict_set_int32(dict, key, stripe_count);
-    if (ret) {
-        gf_log(this->name, GF_LOG_WARNING, "failed to set %s in xattr_req dict",
-               key);
-        goto out;
-    }
-
-    sprintf(key, "trusted.%s.stripe-index", this->name);
-    ret = dict_set_int32(dict, key, stripe_index);
-    if (ret) {
-        gf_log(this->name, GF_LOG_WARNING, "failed to set %s in xattr_req dict",
-               key);
-        goto out;
-    }
-
-    sprintf(key, "trusted.%s.stripe-coalesce", this->name);
-    ret = dict_set_int32(dict, key, stripe_coalesce);
-    if (ret) {
-        gf_log(this->name, GF_LOG_WARNING, "failed to set %s in xattr_req_dict",
-               key);
-        goto out;
-    }
-out:
-    return ret;
-}
-
-static int
-set_default_block_size(stripe_private_t *priv, char *num)
-{
-    int ret = -1;
-    GF_VALIDATE_OR_GOTO("stripe", THIS, out);
-    GF_VALIDATE_OR_GOTO(THIS->name, priv, out);
-    GF_VALIDATE_OR_GOTO(THIS->name, num, out);
-
-    if (gf_string2bytesize_uint64(num, &priv->block_size) != 0) {
-        gf_log(THIS->name, GF_LOG_ERROR, "invalid number format \"%s\"", num);
-        goto out;
-    }
-
-    ret = 0;
-
-out:
-    return ret;
-}
-
-int
-set_stripe_block_size(xlator_t *this, stripe_private_t *priv, char *data)
-{
-    int ret = -1;
-    char *tmp_str = NULL;
-    char *tmp_str1 = NULL;
-    char *dup_str = NULL;
-    char *stripe_str = NULL;
-    char *pattern = NULL;
-    char *num = NULL;
-    struct stripe_options *temp_stripeopt = NULL;
-    struct stripe_options *stripe_opt = NULL;
-
-    if (!this || !priv || !data)
-        goto out;
-
-    /* Get the pattern for striping.
-       "option block-size *avi:10MB" etc */
-    stripe_str = strtok_r(data, ",", &tmp_str);
-    while (stripe_str) {
-        dup_str = gf_strdup(stripe_str);
-        stripe_opt = GF_CALLOC(1, sizeof(struct stripe_options),
-                               gf_stripe_mt_stripe_options);
-        if (!stripe_opt) {
-            goto out;
-        }
-
-        pattern = strtok_r(dup_str, ":", &tmp_str1);
-        num = strtok_r(NULL, ":", &tmp_str1);
-        if (!num) {
-            num = pattern;
-            pattern = "*";
-            ret = set_default_block_size(priv, num);
-            if (ret)
-                goto out;
-        }
-        if (gf_string2bytesize_uint64(num, &stripe_opt->block_size) != 0) {
-            gf_log(this->name, GF_LOG_ERROR, "invalid number format \"%s\"",
-                   num);
-            goto out;
-        }
-
-        if (stripe_opt->block_size < STRIPE_MIN_BLOCK_SIZE) {
-            gf_log(this->name, GF_LOG_ERROR,
-                   "Invalid Block-size: "
-                   "%s. Should be at least %llu bytes",
-                   num, STRIPE_MIN_BLOCK_SIZE);
-            goto out;
-        }
-        if (stripe_opt->block_size % 512) {
-            gf_log(this->name, GF_LOG_ERROR,
-                   "Block-size: %s should"
-                   " be a multiple of 512 bytes",
-                   num);
-            goto out;
-        }
-
-        memcpy(stripe_opt->path_pattern, pattern, strlen(pattern));
-
-        gf_log(this->name, GF_LOG_DEBUG,
-               "block-size : pattern %s : size %" PRId64,
-               stripe_opt->path_pattern, stripe_opt->block_size);
-
-        if (priv->pattern)
-            temp_stripeopt = NULL;
-        else
-            temp_stripeopt = priv->pattern;
-
-        stripe_opt->next = temp_stripeopt;
-
-        priv->pattern = stripe_opt;
-        stripe_opt = NULL;
-
-        GF_FREE(dup_str);
-        dup_str = NULL;
-
-        stripe_str = strtok_r(NULL, ",", &tmp_str);
-    }
-
-    ret = 0;
-out:
-
-    GF_FREE(dup_str);
-
-    GF_FREE(stripe_opt);
-
-    return ret;
-}
-
-int32_t
-stripe_iatt_merge(struct iatt *from, struct iatt *to)
-{
-    if (to->ia_size < from->ia_size)
-        to->ia_size = from->ia_size;
-    if (to->ia_mtime < from->ia_mtime)
-        to->ia_mtime = from->ia_mtime;
-    if (to->ia_ctime < from->ia_ctime)
-        to->ia_ctime = from->ia_ctime;
-    if (to->ia_atime < from->ia_atime)
-        to->ia_atime = from->ia_atime;
-    return 0;
-}
-
-off_t
-coalesced_offset(off_t offset, uint64_t stripe_size, int stripe_count)
-{
-    size_t line_size = 0;
-    uint64_t stripe_num = 0;
-    off_t coalesced_offset = 0;
-
-    line_size = stripe_size * stripe_count;
-    stripe_num = offset / line_size;
-
-    coalesced_offset = (stripe_num * stripe_size) + (offset % stripe_size);
-
-    return coalesced_offset;
-}
-
-off_t
-uncoalesced_size(off_t size, uint64_t stripe_size, int stripe_count,
-                 int stripe_index)
-{
-    uint64_t nr_full_stripe_chunks = 0, mod = 0;
-
-    if (!size)
-        return size;
-
-    /*
-     * Estimate the number of fully written stripes from the
-     * local file size. Each stripe_size chunk corresponds to
-     * a stripe.
-     */
-    nr_full_stripe_chunks = (size / stripe_size) * stripe_count;
-    mod = size % stripe_size;
-
-    if (!mod) {
-        /*
-         * There is no remainder, thus we could have overestimated
-         * the size of the file in terms of chunks. Trim the number
-         * of chunks by the following stripe members and leave it
-         * up to those nodes to respond with a larger size (if
-         * necessary).
-         */
-        nr_full_stripe_chunks -= stripe_count - (stripe_index + 1);
-        size = nr_full_stripe_chunks * stripe_size;
-    } else {
-        /*
-         * There is a remainder and thus we own the last chunk of the
-         * file. Add the preceding stripe members of the final stripe
-         * along with the remainder to calculate the exact size.
-         */
-        nr_full_stripe_chunks += stripe_index;
-        size = nr_full_stripe_chunks * stripe_size + mod;
-    }
-
-    return size;
-}
diff --git a/xlators/cluster/stripe/src/stripe-mem-types.h b/xlators/cluster/stripe/src/stripe-mem-types.h
deleted file mode 100644
index 3ca6ecc7a41..00000000000
--- a/xlators/cluster/stripe/src/stripe-mem-types.h
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef __STRIPE_MEM_TYPES_H__
-#define __STRIPE_MEM_TYPES_H__
-
-#include <glusterfs/mem-types.h>
-
-enum gf_stripe_mem_types_ {
-    gf_stripe_mt_iovec = gf_common_mt_end + 1,
-    gf_stripe_mt_stripe_replies,
-    gf_stripe_mt_stripe_fd_ctx_t,
-    gf_stripe_mt_char,
-    gf_stripe_mt_int8_t,
-    gf_stripe_mt_int32_t,
-    gf_stripe_mt_xlator_t,
-    gf_stripe_mt_stripe_private_t,
-    gf_stripe_mt_stripe_options,
-    gf_stripe_mt_xattr_sort_t,
-    gf_stripe_mt_end
-};
-#endif
diff --git a/xlators/cluster/stripe/src/stripe.c b/xlators/cluster/stripe/src/stripe.c
deleted file mode 100644
index 557a8185352..00000000000
--- a/xlators/cluster/stripe/src/stripe.c
+++ /dev/null
@@ -1,5612 +0,0 @@
-/*
-  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-/**
- * xlators/cluster/stripe:
- *    Stripe translator, stripes the data across its child nodes,
- *    as per the options given in the volfile. The striping works
- *    fairly simple. It writes files at different offset as per
- *    calculation. So, 'ls -l' output at the real posix level will
- *    show file size bigger than the actual size. But when one does
- *    'df' or 'du <file>', real size of the file on the server is shown.
- *
- * WARNING:
- *  Stripe translator can't regenerate data if a child node gets disconnected.
- *  So, no 'self-heal' for stripe. Hence the advice, use stripe only when its
- *  very much necessary, or else, use it in combination with AFR, to have a
- *  backup copy.
- */
-#include <fnmatch.h>
-#include "stripe.h"
-#include "libxlator.h"
-#include <glusterfs/byte-order.h>
-#include <glusterfs/statedump.h>
-
-struct volume_options options[];
-
-int32_t
-stripe_sh_chown_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, struct iatt *preop,
-                    struct iatt *postop, dict_t *xdata)
-{
-    int callcnt = -1;
-    stripe_local_t *local = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        STRIPE_STACK_DESTROY(frame);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_sh_make_entry_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                         int32_t op_ret, int32_t op_errno, inode_t *inode,
-                         struct iatt *buf, struct iatt *preparent,
-                         struct iatt *postparent, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!frame || !frame->local || !cookie || !this) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    STACK_WIND(frame, stripe_sh_chown_cbk, prev->this,
-               prev->this->fops->setattr, &local->loc, &local->stbuf,
-               (GF_SET_ATTR_UID | GF_SET_ATTR_GID), NULL);
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_entry_self_heal(call_frame_t *frame, xlator_t *this,
-                       stripe_local_t *local)
-{
-    xlator_list_t *trav = NULL;
-    call_frame_t *rframe = NULL;
-    stripe_local_t *rlocal = NULL;
-    stripe_private_t *priv = NULL;
-    dict_t *xdata = NULL;
-    int ret = 0;
-
-    if (!local || !this || !frame) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    if (!(IA_ISREG(local->stbuf.ia_type) || IA_ISDIR(local->stbuf.ia_type)))
-        return 0;
-
-    priv = this->private;
-    trav = this->children;
-    rframe = copy_frame(frame);
-    if (!rframe) {
-        goto out;
-    }
-    rlocal = mem_get0(this->local_pool);
-    if (!rlocal) {
-        goto out;
-    }
-    rframe->local = rlocal;
-    rlocal->call_count = priv->child_count;
-    loc_copy(&rlocal->loc, &local->loc);
-    memcpy(&rlocal->stbuf, &local->stbuf, sizeof(struct iatt));
-
-    xdata = dict_new();
-    if (!xdata)
-        goto out;
-
-    ret = dict_set_gfuuid(xdata, "gfid-req", local->stbuf.ia_gfid, true);
-    if (ret)
-        gf_log(this->name, GF_LOG_WARNING, "%s: failed to set gfid-req",
-               local->loc.path);
-
-    while (trav) {
-        if (IA_ISREG(local->stbuf.ia_type)) {
-            STACK_WIND(
-                rframe, stripe_sh_make_entry_cbk, trav->xlator,
-                trav->xlator->fops->mknod, &local->loc,
-                st_mode_from_ia(local->stbuf.ia_prot, local->stbuf.ia_type), 0,
-                0, xdata);
-        }
-        if (IA_ISDIR(local->stbuf.ia_type)) {
-            STACK_WIND(
-                rframe, stripe_sh_make_entry_cbk, trav->xlator,
-                trav->xlator->fops->mkdir, &local->loc,
-                st_mode_from_ia(local->stbuf.ia_prot, local->stbuf.ia_type), 0,
-                xdata);
-        }
-        trav = trav->next;
-    }
-
-    if (xdata)
-        dict_unref(xdata);
-    return 0;
-
-out:
-    if (rframe)
-        STRIPE_STACK_DESTROY(rframe);
-
-    return 0;
-}
-
-int32_t
-stripe_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, inode_t *inode,
-                  struct iatt *buf, dict_t *xdata, struct iatt *postparent)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-    int ret = 0;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            if ((op_errno != ENOENT) && (op_errno != ESTALE))
-                gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                       prev->this->name, strerror(op_errno));
-            if (local->op_errno != ESTALE)
-                local->op_errno = op_errno;
-            if (((op_errno != ENOENT) && (op_errno != ENOTCONN) &&
-                 (op_errno != ESTALE)) ||
-                (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-            if (op_errno == ENOENT)
-                local->entry_self_heal_needed = 1;
-        }
-
-        if (op_ret >= 0) {
-            local->op_ret = 0;
-            if (IA_ISREG(buf->ia_type)) {
-                ret = stripe_ctx_handle(this, prev, local, xdata);
-                if (ret)
-                    gf_log(this->name, GF_LOG_ERROR,
-                           "Error getting fctx info from"
-                           " dict");
-            }
-
-            if (FIRST_CHILD(this) == prev->this) {
-                local->stbuf = *buf;
-                local->postparent = *postparent;
-                local->inode = inode_ref(inode);
-                if (xdata)
-                    local->xdata = dict_ref(xdata);
-                if (local->xattr) {
-                    stripe_aggregate_xattr(local->xdata, local->xattr);
-                    dict_unref(local->xattr);
-                    local->xattr = NULL;
-                }
-            }
-
-            if (!local->xdata && !local->xattr) {
-                local->xattr = dict_ref(xdata);
-            } else if (local->xdata) {
-                stripe_aggregate_xattr(local->xdata, xdata);
-            } else if (local->xattr) {
-                stripe_aggregate_xattr(local->xattr, xdata);
-            }
-
-            local->stbuf_blocks += buf->ia_blocks;
-            local->postparent_blocks += postparent->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-            if (local->postparent_size < postparent->ia_size)
-                local->postparent_size = postparent->ia_size;
-
-            if (gf_uuid_is_null(local->ia_gfid))
-                gf_uuid_copy(local->ia_gfid, buf->ia_gfid);
-
-            /* Make sure the gfid on all the nodes are same */
-            if (gf_uuid_compare(local->ia_gfid, buf->ia_gfid)) {
-                gf_log(this->name, GF_LOG_WARNING,
-                       "%s: gfid different on subvolume %s", local->loc.path,
-                       prev->this->name);
-            }
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->op_ret == 0 && local->entry_self_heal_needed &&
-            !gf_uuid_is_null(local->loc.inode->gfid))
-            stripe_entry_self_heal(frame, this, local);
-
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-            local->stbuf.ia_size = local->stbuf_size;
-            local->postparent.ia_blocks = local->postparent_blocks;
-            local->postparent.ia_size = local->postparent_size;
-            inode_ctx_put(local->inode, this, (uint64_t)(long)local->fctx);
-        }
-
-        STRIPE_STACK_UNWIND(lookup, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, local->xdata,
-                            &local->postparent);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_lookup(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-    int64_t filesize = 0;
-    int ret = 0;
-    uint64_t tmpctx = 0;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    loc_copy(&local->loc, loc);
-
-    inode_ctx_get(local->inode, this, &tmpctx);
-    if (tmpctx)
-        local->fctx = (stripe_fd_ctx_t *)(long)tmpctx;
-
-    /* quick-read friendly changes */
-    if (xdata && dict_get(xdata, GF_CONTENT_KEY)) {
-        ret = dict_get_int64(xdata, GF_CONTENT_KEY, &filesize);
-        if (!ret && (filesize > priv->block_size))
-            dict_del(xdata, GF_CONTENT_KEY);
-    }
-
-    /* get stripe-size xattr on lookup. This would be required for
-     * open/read/write/pathinfo calls. Hence we send down the request
-     * even when type == IA_INVAL */
-
-    /*
-     * We aren't guaranteed to have xdata here. We need the format info for
-     * the file, so allocate xdata if necessary.
-     */
-    if (!xdata)
-        xdata = dict_new();
-    else
-        xdata = dict_ref(xdata);
-
-    if (xdata &&
-        (IA_ISREG(loc->inode->ia_type) || (loc->inode->ia_type == IA_INVAL))) {
-        ret = stripe_xattr_request_build(this, xdata, 8, 4, 4, 0);
-        if (ret)
-            gf_log(this->name, GF_LOG_ERROR,
-                   "Failed to build"
-                   " xattr request for %s",
-                   loc->path);
-    }
-
-    /* Every time in stripe lookup, all child nodes
-       should be looked up */
-    local->call_count = priv->child_count;
-    while (trav) {
-        STACK_WIND(frame, stripe_lookup_cbk, trav->xlator,
-                   trav->xlator->fops->lookup, loc, xdata);
-        trav = trav->next;
-    }
-
-    dict_unref(xdata);
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_stat_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, struct iatt *buf,
-                dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret == 0) {
-            local->op_ret = 0;
-
-            if (FIRST_CHILD(this) == prev->this) {
-                local->stbuf = *buf;
-            }
-
-            local->stbuf_blocks += buf->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-        }
-
-        STRIPE_STACK_UNWIND(stat, frame, local->op_ret, local->op_errno,
-                            &local->stbuf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_stat(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    if (IA_ISREG(loc->inode->ia_type)) {
-        inode_ctx_get(loc->inode, this, (uint64_t *)&fctx);
-        if (!fctx)
-            goto err;
-        local->fctx = fctx;
-    }
-
-    while (trav) {
-        STACK_WIND(frame, stripe_stat_cbk, trav->xlator,
-                   trav->xlator->fops->stat, loc, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-
-err:
-    STRIPE_STACK_UNWIND(stat, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_statfs_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct statvfs *stbuf,
-                  dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    int32_t callcnt = 0;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret && (op_errno != ENOTCONN)) {
-            local->op_errno = op_errno;
-        }
-        if (op_ret == 0) {
-            struct statvfs *dict_buf = &local->statvfs_buf;
-            dict_buf->f_bsize = stbuf->f_bsize;
-            dict_buf->f_frsize = stbuf->f_frsize;
-            dict_buf->f_blocks += stbuf->f_blocks;
-            dict_buf->f_bfree += stbuf->f_bfree;
-            dict_buf->f_bavail += stbuf->f_bavail;
-            dict_buf->f_files += stbuf->f_files;
-            dict_buf->f_ffree += stbuf->f_ffree;
-            dict_buf->f_favail += stbuf->f_favail;
-            dict_buf->f_fsid = stbuf->f_fsid;
-            dict_buf->f_flag = stbuf->f_flag;
-            dict_buf->f_namemax = stbuf->f_namemax;
-            local->op_ret = 0;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        STRIPE_STACK_UNWIND(statfs, frame, local->op_ret, local->op_errno,
-                            &local->statvfs_buf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_statfs(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-
-    trav = this->children;
-    priv = this->private;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    local->op_errno = ENOTCONN;
-    frame->local = local;
-
-    local->call_count = priv->child_count;
-    while (trav) {
-        STACK_WIND(frame, stripe_statfs_cbk, trav->xlator,
-                   trav->xlator->fops->statfs, loc, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(statfs, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_truncate_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                    struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret == 0) {
-            local->op_ret = 0;
-            if (FIRST_CHILD(this) == prev->this) {
-                local->pre_buf = *prebuf;
-                local->post_buf = *postbuf;
-            }
-
-            local->prebuf_blocks += prebuf->ia_blocks;
-            local->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, local->fctx, prev);
-            correct_file_size(postbuf, local->fctx, prev);
-
-            if (local->prebuf_size < prebuf->ia_size)
-                local->prebuf_size = prebuf->ia_size;
-
-            if (local->postbuf_size < postbuf->ia_size)
-                local->postbuf_size = postbuf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->pre_buf.ia_blocks = local->prebuf_blocks;
-            local->pre_buf.ia_size = local->prebuf_size;
-            local->post_buf.ia_blocks = local->postbuf_blocks;
-            local->post_buf.ia_size = local->postbuf_size;
-        }
-
-        STRIPE_STACK_UNWIND(truncate, frame, local->op_ret, local->op_errno,
-                            &local->pre_buf, &local->post_buf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_truncate(call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset,
-                dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = EINVAL;
-    int i, eof_idx;
-    off_t dest_offset, tmp_offset;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    inode_ctx_get(loc->inode, this, (uint64_t *)&fctx);
-    if (!fctx) {
-        gf_log(this->name, GF_LOG_ERROR, "no stripe context");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    local->fctx = fctx;
-    eof_idx = (offset / fctx->stripe_size) % fctx->stripe_count;
-
-    for (i = 0; i < fctx->stripe_count; i++) {
-        if (!fctx->xl_array[i]) {
-            gf_log(this->name, GF_LOG_ERROR, "no xlator at index %d", i);
-            op_errno = EINVAL;
-            goto err;
-        }
-
-        if (fctx->stripe_coalesce) {
-            /*
-             * The node that owns EOF is truncated to the exact
-             * coalesced offset. Nodes prior to this index should
-             * be rounded up to the size of the complete stripe,
-             * while nodes after this index should be rounded down
-             * to the size of the previous stripe.
-             */
-            if (i < eof_idx)
-                tmp_offset = gf_roof(offset,
-                                     fctx->stripe_size * fctx->stripe_count);
-            else if (i > eof_idx)
-                tmp_offset = gf_floor(offset,
-                                      fctx->stripe_size * fctx->stripe_count);
-            else
-                tmp_offset = offset;
-
-            dest_offset = coalesced_offset(tmp_offset, fctx->stripe_size,
-                                           fctx->stripe_count);
-        } else {
-            dest_offset = offset;
-        }
-
-        STACK_WIND(frame, stripe_truncate_cbk, fctx->xl_array[i],
-                   fctx->xl_array[i]->fops->truncate, loc, dest_offset, NULL);
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(truncate, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_setattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct iatt *preop,
-                   struct iatt *postop, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret == 0) {
-            local->op_ret = 0;
-
-            if (FIRST_CHILD(this) == prev->this) {
-                local->pre_buf = *preop;
-                local->post_buf = *postop;
-            }
-
-            local->prebuf_blocks += preop->ia_blocks;
-            local->postbuf_blocks += postop->ia_blocks;
-
-            correct_file_size(preop, local->fctx, prev);
-            correct_file_size(postop, local->fctx, prev);
-
-            if (local->prebuf_size < preop->ia_size)
-                local->prebuf_size = preop->ia_size;
-            if (local->postbuf_size < postop->ia_size)
-                local->postbuf_size = postop->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->pre_buf.ia_blocks = local->prebuf_blocks;
-            local->pre_buf.ia_size = local->prebuf_size;
-            local->post_buf.ia_blocks = local->postbuf_blocks;
-            local->post_buf.ia_size = local->postbuf_size;
-        }
-
-        STRIPE_STACK_UNWIND(setattr, frame, local->op_ret, local->op_errno,
-                            &local->pre_buf, &local->post_buf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_setattr(call_frame_t *frame, xlator_t *this, loc_t *loc,
-               struct iatt *stbuf, int32_t valid, dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    if (!IA_ISDIR(loc->inode->ia_type) && !IA_ISREG(loc->inode->ia_type)) {
-        local->call_count = 1;
-        STACK_WIND(frame, stripe_setattr_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->setattr, loc, stbuf, valid, NULL);
-        return 0;
-    }
-
-    if (IA_ISREG(loc->inode->ia_type)) {
-        inode_ctx_get(loc->inode, this, (uint64_t *)&fctx);
-        if (!fctx)
-            goto err;
-        local->fctx = fctx;
-    }
-
-    local->call_count = priv->child_count;
-    while (trav) {
-        STACK_WIND(frame, stripe_setattr_cbk, trav->xlator,
-                   trav->xlator->fops->setattr, loc, stbuf, valid, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(setattr, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_fsetattr(call_frame_t *frame, xlator_t *this, fd_t *fd,
-                struct iatt *stbuf, int32_t valid, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_setattr_cbk, trav->xlator,
-                   trav->xlator->fops->fsetattr, fd, stbuf, valid, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fsetattr, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_stack_rename_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno, struct iatt *buf,
-                        struct iatt *preoldparent, struct iatt *postoldparent,
-                        struct iatt *prenewparent, struct iatt *postnewparent,
-                        dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret == 0) {
-            local->op_ret = 0;
-
-            local->stbuf.ia_blocks += buf->ia_blocks;
-            local->preparent.ia_blocks += preoldparent->ia_blocks;
-            local->postparent.ia_blocks += postoldparent->ia_blocks;
-            local->pre_buf.ia_blocks += prenewparent->ia_blocks;
-            local->post_buf.ia_blocks += postnewparent->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf.ia_size < buf->ia_size)
-                local->stbuf.ia_size = buf->ia_size;
-
-            if (local->preparent.ia_size < preoldparent->ia_size)
-                local->preparent.ia_size = preoldparent->ia_size;
-
-            if (local->postparent.ia_size < postoldparent->ia_size)
-                local->postparent.ia_size = postoldparent->ia_size;
-
-            if (local->pre_buf.ia_size < prenewparent->ia_size)
-                local->pre_buf.ia_size = prenewparent->ia_size;
-
-            if (local->post_buf.ia_size < postnewparent->ia_size)
-                local->post_buf.ia_size = postnewparent->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        STRIPE_STACK_UNWIND(rename, frame, local->op_ret, local->op_errno,
-                            &local->stbuf, &local->preparent,
-                            &local->postparent, &local->pre_buf,
-                            &local->post_buf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_first_rename_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno, struct iatt *buf,
-                        struct iatt *preoldparent, struct iatt *postoldparent,
-                        struct iatt *prenewparent, struct iatt *postnewparent,
-                        dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        op_errno = EINVAL;
-        goto unwind;
-    }
-
-    if (op_ret == -1) {
-        goto unwind;
-    }
-
-    local = frame->local;
-    trav = this->children;
-
-    local->stbuf = *buf;
-    local->preparent = *preoldparent;
-    local->postparent = *postoldparent;
-    local->pre_buf = *prenewparent;
-    local->post_buf = *postnewparent;
-
-    local->op_ret = 0;
-    local->call_count--;
-
-    trav = trav->next; /* Skip first child */
-    while (trav) {
-        STACK_WIND(frame, stripe_stack_rename_cbk, trav->xlator,
-                   trav->xlator->fops->rename, &local->loc, &local->loc2, NULL);
-        trav = trav->next;
-    }
-    return 0;
-
-unwind:
-    STRIPE_STACK_UNWIND(rename, frame, -1, op_errno, buf, preoldparent,
-                        postoldparent, prenewparent, postnewparent, NULL);
-    return 0;
-}
-
-int32_t
-stripe_rename(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
-              dict_t *xdata)
-{
-    stripe_private_t *priv = NULL;
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(oldloc, err);
-    VALIDATE_OR_GOTO(oldloc->path, err);
-    VALIDATE_OR_GOTO(oldloc->inode, err);
-    VALIDATE_OR_GOTO(newloc, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* If any one node is down, don't allow rename */
-    if (priv->nodes_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    frame->local = local;
-
-    local->op_ret = -1;
-    loc_copy(&local->loc, oldloc);
-    loc_copy(&local->loc2, newloc);
-
-    local->call_count = priv->child_count;
-
-    if (IA_ISREG(oldloc->inode->ia_type)) {
-        inode_ctx_get(oldloc->inode, this, (uint64_t *)&fctx);
-        if (!fctx)
-            goto err;
-        local->fctx = fctx;
-    }
-
-    STACK_WIND(frame, stripe_first_rename_cbk, trav->xlator,
-               trav->xlator->fops->rename, oldloc, newloc, NULL);
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(rename, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL, NULL);
-    return 0;
-}
-int32_t
-stripe_first_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno,
-                        struct iatt *preparent, struct iatt *postparent,
-                        dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    if (op_ret == -1) {
-        gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-               strerror(op_errno));
-        goto out;
-    }
-    local->op_ret = 0;
-    local->preparent = *preparent;
-    local->postparent = *postparent;
-    local->preparent_blocks += preparent->ia_blocks;
-    local->postparent_blocks += postparent->ia_blocks;
-
-    STRIPE_STACK_UNWIND(unlink, frame, local->op_ret, local->op_errno,
-                        &local->preparent, &local->postparent, xdata);
-    return 0;
-out:
-    STRIPE_STACK_UNWIND(unlink, frame, -1, op_errno, NULL, NULL, NULL);
-
-    return 0;
-}
-
-int32_t
-stripe_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                  struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-                   strerror(op_errno));
-            local->op_errno = op_errno;
-            if (op_errno != ENOENT) {
-                local->failed = 1;
-                local->op_ret = op_ret;
-            }
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (callcnt == 1) {
-        if (local->failed) {
-            op_errno = local->op_errno;
-            goto out;
-        }
-        STACK_WIND(frame, stripe_first_unlink_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->unlink, &local->loc, local->xflag,
-                   local->xdata);
-    }
-    return 0;
-out:
-    STRIPE_STACK_UNWIND(unlink, frame, -1, op_errno, NULL, NULL, NULL);
-
-    return 0;
-}
-
-int32_t
-stripe_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflag,
-              dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Don't unlink a file if a node is down */
-    if (priv->nodes_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    loc_copy(&local->loc, loc);
-    local->xflag = xflag;
-
-    if (xdata)
-        local->xdata = dict_ref(xdata);
-
-    frame->local = local;
-    local->call_count = priv->child_count;
-    trav = trav->next; /* Skip the first child */
-
-    while (trav) {
-        STACK_WIND(frame, stripe_unlink_cbk, trav->xlator,
-                   trav->xlator->fops->unlink, loc, xflag, xdata);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(unlink, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_first_rmdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                       struct iatt *postparent, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    if (op_ret == -1) {
-        goto err;
-    }
-
-    local = frame->local;
-    local->op_ret = 0;
-
-    local->call_count--; /* First child successful */
-
-    local->preparent = *preparent;
-    local->postparent = *postparent;
-    local->preparent_size = preparent->ia_size;
-    local->postparent_size = postparent->ia_size;
-    local->preparent_blocks += preparent->ia_blocks;
-    local->postparent_blocks += postparent->ia_blocks;
-
-    STRIPE_STACK_UNWIND(rmdir, frame, local->op_ret, local->op_errno,
-                        &local->preparent, &local->postparent, xdata);
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(rmdir, frame, op_ret, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_rmdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, struct iatt *preparent,
-                 struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-                   strerror(op_errno));
-            if (op_errno != ENOENT)
-                local->failed = 1;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (callcnt == 1) {
-        if (local->failed)
-            goto out;
-        STACK_WIND(frame, stripe_first_rmdir_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->rmdir, &local->loc, local->flags,
-                   NULL);
-    }
-    return 0;
-out:
-    STRIPE_STACK_UNWIND(rmdir, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_rmdir(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
-             dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* don't delete a directory if any of the subvolume is down */
-    if (priv->nodes_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    loc_copy(&local->loc, loc);
-    local->flags = flags;
-    local->call_count = priv->child_count;
-    trav = trav->next; /* skip the first child */
-
-    while (trav) {
-        STACK_WIND(frame, stripe_rmdir_cbk, trav->xlator,
-                   trav->xlator->fops->rmdir, loc, flags, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(rmdir, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_mknod_ifreg_fail_unlink_cbk(call_frame_t *frame, void *cookie,
-                                   xlator_t *this, int32_t op_ret,
-                                   int32_t op_errno, struct iatt *preparent,
-                                   struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        STRIPE_STACK_UNWIND(mknod, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, &local->preparent,
-                            &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-/**
- */
-int32_t
-stripe_mknod_ifreg_setxattr_cbk(call_frame_t *frame, void *cookie,
-                                xlator_t *this, int32_t op_ret,
-                                int32_t op_errno, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    priv = this->private;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_ret = -1;
-            local->op_errno = op_errno;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->op_ret == -1) {
-            local->call_count = priv->child_count;
-            while (trav) {
-                STACK_WIND(frame, stripe_mknod_ifreg_fail_unlink_cbk,
-                           trav->xlator, trav->xlator->fops->unlink,
-                           &local->loc, 0, NULL);
-                trav = trav->next;
-            }
-            return 0;
-        }
-
-        STRIPE_STACK_UNWIND(mknod, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, &local->preparent,
-                            &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_mknod_ifreg_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, inode_t *inode,
-                       struct iatt *buf, struct iatt *preparent,
-                       struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    call_frame_t *prev = NULL;
-    xlator_list_t *trav = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    priv = this->private;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-            local->op_errno = op_errno;
-        }
-        if (op_ret >= 0) {
-            local->op_ret = op_ret;
-
-            /* Can be used as a mechanism to understand if mknod
-               was successful in at least one place */
-            if (gf_uuid_is_null(local->ia_gfid))
-                gf_uuid_copy(local->ia_gfid, buf->ia_gfid);
-
-            if (stripe_ctx_handle(this, prev, local, xdata))
-                gf_log(this->name, GF_LOG_ERROR,
-                       "Error getting fctx info from dict");
-
-            local->stbuf_blocks += buf->ia_blocks;
-            local->preparent_blocks += preparent->ia_blocks;
-            local->postparent_blocks += postparent->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-            if (local->preparent_size < preparent->ia_size)
-                local->preparent_size = preparent->ia_size;
-            if (local->postparent_size < postparent->ia_size)
-                local->postparent_size = postparent->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if ((local->op_ret == -1) && !gf_uuid_is_null(local->ia_gfid)) {
-            /* ia_gfid set means, at least on one node 'mknod'
-               is successful */
-            local->call_count = priv->child_count;
-            trav = this->children;
-            while (trav) {
-                STACK_WIND(frame, stripe_mknod_ifreg_fail_unlink_cbk,
-                           trav->xlator, trav->xlator->fops->unlink,
-                           &local->loc, 0, NULL);
-                trav = trav->next;
-            }
-            return 0;
-        }
-
-        if (local->op_ret != -1) {
-            local->preparent.ia_blocks = local->preparent_blocks;
-            local->preparent.ia_size = local->preparent_size;
-            local->postparent.ia_blocks = local->postparent_blocks;
-            local->postparent.ia_size = local->postparent_size;
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-            inode_ctx_put(local->inode, this, (uint64_t)(long)local->fctx);
-        }
-        STRIPE_STACK_UNWIND(mknod, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, &local->preparent,
-                            &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_mknod_first_ifreg_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                             int32_t op_ret, int32_t op_errno, inode_t *inode,
-                             struct iatt *buf, struct iatt *preparent,
-                             struct iatt *postparent, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    call_frame_t *prev = NULL;
-    xlator_list_t *trav = NULL;
-    int i = 1;
-    dict_t *dict = NULL;
-    int ret = 0;
-    int need_unref = 0;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    priv = this->private;
-    local = frame->local;
-    trav = this->children;
-
-    local->call_count--;
-
-    if (op_ret == -1) {
-        gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-               prev->this->name, strerror(op_errno));
-        local->failed = 1;
-        local->op_errno = op_errno;
-        goto out;
-    }
-
-    local->op_ret = op_ret;
-
-    local->stbuf = *buf;
-    local->preparent = *preparent;
-    local->postparent = *postparent;
-
-    if (gf_uuid_is_null(local->ia_gfid))
-        gf_uuid_copy(local->ia_gfid, buf->ia_gfid);
-    local->preparent.ia_blocks = local->preparent_blocks;
-    local->preparent.ia_size = local->preparent_size;
-    local->postparent.ia_blocks = local->postparent_blocks;
-    local->postparent.ia_size = local->postparent_size;
-    local->stbuf.ia_size = local->stbuf_size;
-    local->stbuf.ia_blocks = local->stbuf_blocks;
-
-    trav = trav->next;
-    while (trav) {
-        if (priv->xattr_supported) {
-            dict = dict_new();
-            if (!dict) {
-                gf_log(this->name, GF_LOG_ERROR, "failed to allocate dict %s",
-                       local->loc.path);
-            }
-            need_unref = 1;
-
-            dict_copy(local->xattr, dict);
-
-            ret = stripe_xattr_request_build(this, dict, local->stripe_size,
-                                             priv->child_count, i,
-                                             priv->coalesce);
-            if (ret)
-                gf_log(this->name, GF_LOG_ERROR,
-                       "Failed to build xattr request");
-
-        } else {
-            dict = local->xattr;
-        }
-
-        STACK_WIND(frame, stripe_mknod_ifreg_cbk, trav->xlator,
-                   trav->xlator->fops->mknod, &local->loc, local->mode,
-                   local->rdev, 0, dict);
-        trav = trav->next;
-        i++;
-
-        if (dict && need_unref)
-            dict_unref(dict);
-    }
-
-    return 0;
-
-out:
-
-    STRIPE_STACK_UNWIND(mknod, frame, op_ret, op_errno, NULL, NULL, NULL, NULL,
-                        NULL);
-    return 0;
-}
-
-int32_t
-stripe_single_mknod_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno, inode_t *inode,
-                        struct iatt *buf, struct iatt *preparent,
-                        struct iatt *postparent, dict_t *xdata)
-{
-    STRIPE_STACK_UNWIND(mknod, frame, op_ret, op_errno, inode, buf, preparent,
-                        postparent, xdata);
-    return 0;
-}
-
-int
-stripe_mknod(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-             dev_t rdev, mode_t umask, dict_t *xdata)
-{
-    stripe_private_t *priv = NULL;
-    stripe_local_t *local = NULL;
-    int32_t op_errno = EINVAL;
-    int32_t i = 0;
-    dict_t *dict = NULL;
-    int ret = 0;
-    int need_unref = 0;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    if (S_ISREG(mode)) {
-        /* NOTE: on older kernels (older than 2.6.9),
-           creat() fops is sent as mknod() + open(). Hence handling
-           S_IFREG files is necessary */
-        if (priv->nodes_down) {
-            gf_log(this->name, GF_LOG_WARNING, "Some node down, returning EIO");
-            op_errno = EIO;
-            goto err;
-        }
-
-        /* Initialization */
-        local = mem_get0(this->local_pool);
-        if (!local) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        local->op_ret = -1;
-        local->op_errno = ENOTCONN;
-        local->stripe_size = stripe_get_matching_bs(loc->path, priv);
-        frame->local = local;
-        local->inode = inode_ref(loc->inode);
-        loc_copy(&local->loc, loc);
-        local->xattr = dict_copy_with_ref(xdata, NULL);
-        local->mode = mode;
-        local->umask = umask;
-        local->rdev = rdev;
-
-        /* Every time in stripe lookup, all child nodes should
-           be looked up */
-        local->call_count = priv->child_count;
-
-        if (priv->xattr_supported) {
-            dict = dict_new();
-            if (!dict) {
-                gf_log(this->name, GF_LOG_ERROR, "failed to allocate dict %s",
-                       loc->path);
-            }
-            need_unref = 1;
-
-            dict_copy(xdata, dict);
-
-            ret = stripe_xattr_request_build(this, dict, local->stripe_size,
-                                             priv->child_count, i,
-                                             priv->coalesce);
-            if (ret)
-                gf_log(this->name, GF_LOG_ERROR,
-                       "failed to build xattr request");
-        } else {
-            dict = xdata;
-        }
-
-        STACK_WIND(frame, stripe_mknod_first_ifreg_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask,
-                   dict);
-
-        if (dict && need_unref)
-            dict_unref(dict);
-        return 0;
-    }
-
-    STACK_WIND(frame, stripe_single_mknod_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->mknod, loc, mode, rdev, umask, xdata);
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(mknod, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL);
-    return 0;
-}
-
-int32_t
-stripe_mkdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, inode_t *inode,
-                 struct iatt *buf, struct iatt *preparent,
-                 struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret >= 0) {
-            local->op_ret = 0;
-
-            local->stbuf_blocks += buf->ia_blocks;
-            local->preparent_blocks += preparent->ia_blocks;
-            local->postparent_blocks += postparent->ia_blocks;
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-            if (local->preparent_size < preparent->ia_size)
-                local->preparent_size = preparent->ia_size;
-            if (local->postparent_size < postparent->ia_size)
-                local->postparent_size = postparent->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed != -1) {
-            local->preparent.ia_blocks = local->preparent_blocks;
-            local->preparent.ia_size = local->preparent_size;
-            local->postparent.ia_blocks = local->postparent_blocks;
-            local->postparent.ia_size = local->postparent_size;
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-        }
-        STRIPE_STACK_UNWIND(mkdir, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, &local->preparent,
-                            &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_first_mkdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, inode_t *inode,
-                       struct iatt *buf, struct iatt *preparent,
-                       struct iatt *postparent, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-    xlator_list_t *trav = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-    trav = this->children;
-
-    local->call_count--; /* first child is successful */
-    trav = trav->next;   /* skip first child */
-
-    if (op_ret == -1) {
-        gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-               prev->this->name, strerror(op_errno));
-        local->op_errno = op_errno;
-        goto out;
-    }
-
-    local->op_ret = 0;
-
-    local->inode = inode_ref(inode);
-    local->stbuf = *buf;
-    local->postparent = *postparent;
-    local->preparent = *preparent;
-
-    local->stbuf_blocks += buf->ia_blocks;
-    local->preparent_blocks += preparent->ia_blocks;
-    local->postparent_blocks += postparent->ia_blocks;
-
-    local->stbuf_size = buf->ia_size;
-    local->preparent_size = preparent->ia_size;
-    local->postparent_size = postparent->ia_size;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_mkdir_cbk, trav->xlator,
-                   trav->xlator->fops->mkdir, &local->loc, local->mode,
-                   local->umask, local->xdata);
-        trav = trav->next;
-    }
-    return 0;
-out:
-    STRIPE_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL);
-
-    return 0;
-}
-
-int
-stripe_mkdir(call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-             mode_t umask, dict_t *xdata)
-{
-    stripe_private_t *priv = NULL;
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    local->call_count = priv->child_count;
-    if (xdata)
-        local->xdata = dict_ref(xdata);
-    local->mode = mode;
-    local->umask = umask;
-    loc_copy(&local->loc, loc);
-    frame->local = local;
-
-    /* Every time in stripe lookup, all child nodes should be looked up */
-    STACK_WIND(frame, stripe_first_mkdir_cbk, trav->xlator,
-               trav->xlator->fops->mkdir, loc, mode, umask, xdata);
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(mkdir, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL);
-    return 0;
-}
-
-int32_t
-stripe_link_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, inode_t *inode,
-                struct iatt *buf, struct iatt *preparent,
-                struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret >= 0) {
-            local->op_ret = 0;
-
-            if (IA_ISREG(inode->ia_type)) {
-                inode_ctx_get(inode, this, (uint64_t *)&fctx);
-                if (!fctx) {
-                    gf_log(this->name, GF_LOG_ERROR,
-                           "failed to get stripe context");
-                    op_ret = -1;
-                    op_errno = EINVAL;
-                }
-            }
-
-            if (FIRST_CHILD(this) == prev->this) {
-                local->inode = inode_ref(inode);
-                local->stbuf = *buf;
-                local->postparent = *postparent;
-                local->preparent = *preparent;
-            }
-            local->stbuf_blocks += buf->ia_blocks;
-            local->preparent_blocks += preparent->ia_blocks;
-            local->postparent_blocks += postparent->ia_blocks;
-
-            correct_file_size(buf, fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-            if (local->preparent_size < preparent->ia_size)
-                local->preparent_size = preparent->ia_size;
-            if (local->postparent_size < postparent->ia_size)
-                local->postparent_size = postparent->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->preparent.ia_blocks = local->preparent_blocks;
-            local->preparent.ia_size = local->preparent_size;
-            local->postparent.ia_blocks = local->postparent_blocks;
-            local->postparent.ia_size = local->postparent_size;
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-        }
-        STRIPE_STACK_UNWIND(link, frame, local->op_ret, local->op_errno,
-                            local->inode, &local->stbuf, &local->preparent,
-                            &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_link(call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc,
-            dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(oldloc, err);
-    VALIDATE_OR_GOTO(oldloc->path, err);
-    VALIDATE_OR_GOTO(oldloc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* If any one node is down, don't allow link operation */
-    if (priv->nodes_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    /* Every time in stripe lookup, all child
-       nodes should be looked up */
-    while (trav) {
-        STACK_WIND(frame, stripe_link_cbk, trav->xlator,
-                   trav->xlator->fops->link, oldloc, newloc, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(link, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL);
-    return 0;
-}
-
-int32_t
-stripe_create_fail_unlink_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                              int32_t op_ret, int32_t op_errno,
-                              struct iatt *preparent, struct iatt *postparent,
-                              dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        STRIPE_STACK_UNWIND(create, frame, local->op_ret, local->op_errno,
-                            local->fd, local->inode, &local->stbuf,
-                            &local->preparent, &local->postparent, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, fd_t *fd, inode_t *inode,
-                  struct iatt *buf, struct iatt *preparent,
-                  struct iatt *postparent, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    call_frame_t *prev = NULL;
-    xlator_list_t *trav = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    priv = this->private;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->failed = 1;
-            local->op_errno = op_errno;
-        }
-
-        if (op_ret >= 0) {
-            if (IA_ISREG(buf->ia_type)) {
-                if (stripe_ctx_handle(this, prev, local, xdata))
-                    gf_log(this->name, GF_LOG_ERROR,
-                           "Error getting fctx info from "
-                           "dict");
-            }
-
-            local->op_ret = op_ret;
-
-            local->stbuf_blocks += buf->ia_blocks;
-            local->preparent_blocks += preparent->ia_blocks;
-            local->postparent_blocks += postparent->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-            if (local->preparent_size < preparent->ia_size)
-                local->preparent_size = preparent->ia_size;
-            if (local->postparent_size < postparent->ia_size)
-                local->postparent_size = postparent->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret == -1) {
-            local->call_count = priv->child_count;
-            trav = this->children;
-            while (trav) {
-                STACK_WIND(frame, stripe_create_fail_unlink_cbk, trav->xlator,
-                           trav->xlator->fops->unlink, &local->loc, 0, NULL);
-                trav = trav->next;
-            }
-
-            return 0;
-        }
-
-        if (local->op_ret >= 0) {
-            local->preparent.ia_blocks = local->preparent_blocks;
-            local->preparent.ia_size = local->preparent_size;
-            local->postparent.ia_blocks = local->postparent_blocks;
-            local->postparent.ia_size = local->postparent_size;
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-
-            stripe_copy_xl_array(local->fctx->xl_array, priv->xl_array,
-                                 local->fctx->stripe_count);
-            inode_ctx_put(local->inode, this, (uint64_t)(uintptr_t)local->fctx);
-        }
-
-        /* Create itself has failed.. so return
-           without setxattring */
-        STRIPE_STACK_UNWIND(create, frame, local->op_ret, local->op_errno,
-                            local->fd, local->inode, &local->stbuf,
-                            &local->preparent, &local->postparent, NULL);
-    }
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_first_create_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno, fd_t *fd,
-                        inode_t *inode, struct iatt *buf,
-                        struct iatt *preparent, struct iatt *postparent,
-                        dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    call_frame_t *prev = NULL;
-    xlator_list_t *trav = NULL;
-    int i = 1;
-    dict_t *dict = NULL;
-    loc_t *loc = NULL;
-    int32_t need_unref = 0;
-    int32_t ret = -1;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    priv = this->private;
-    local = frame->local;
-    trav = this->children;
-    loc = &local->loc;
-
-    --local->call_count;
-
-    if (op_ret == -1) {
-        gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-               prev->this->name, strerror(op_errno));
-        local->failed = 1;
-        local->op_errno = op_errno;
-    }
-
-    local->op_ret = 0;
-    /* Get the mapping in inode private */
-    /* Get the stat buf right */
-    local->stbuf = *buf;
-    local->preparent = *preparent;
-    local->postparent = *postparent;
-
-    local->stbuf_blocks += buf->ia_blocks;
-    local->preparent_blocks += preparent->ia_blocks;
-    local->postparent_blocks += postparent->ia_blocks;
-
-    if (local->stbuf_size < buf->ia_size)
-        local->stbuf_size = buf->ia_size;
-    if (local->preparent_size < preparent->ia_size)
-        local->preparent_size = preparent->ia_size;
-    if (local->postparent_size < postparent->ia_size)
-        local->postparent_size = postparent->ia_size;
-
-    if (local->failed)
-        local->op_ret = -1;
-
-    if (local->op_ret == -1) {
-        local->call_count = 1;
-        STACK_WIND(frame, stripe_create_fail_unlink_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->unlink, &local->loc, 0, NULL);
-        return 0;
-    }
-
-    if (local->op_ret >= 0) {
-        local->preparent.ia_blocks = local->preparent_blocks;
-        local->preparent.ia_size = local->preparent_size;
-        local->postparent.ia_blocks = local->postparent_blocks;
-        local->postparent.ia_size = local->postparent_size;
-        local->stbuf.ia_size = local->stbuf_size;
-        local->stbuf.ia_blocks = local->stbuf_blocks;
-    }
-
-    /* Send a setxattr request to nodes where the
-       files are created */
-    trav = trav->next;
-    while (trav) {
-        if (priv->xattr_supported) {
-            dict = dict_new();
-            if (!dict) {
-                gf_log(this->name, GF_LOG_ERROR, "failed to allocate dict %s",
-                       loc->path);
-            }
-            need_unref = 1;
-
-            dict_copy(local->xattr, dict);
-
-            ret = stripe_xattr_request_build(this, dict, local->stripe_size,
-                                             priv->child_count, i,
-                                             priv->coalesce);
-            if (ret)
-                gf_log(this->name, GF_LOG_ERROR,
-                       "failed to build xattr request");
-        } else {
-            dict = local->xattr;
-        }
-
-        STACK_WIND(frame, stripe_create_cbk, trav->xlator,
-                   trav->xlator->fops->create, &local->loc, local->flags,
-                   local->mode, local->umask, local->fd, dict);
-        trav = trav->next;
-        if (need_unref && dict)
-            dict_unref(dict);
-        i++;
-    }
-
-out:
-    return 0;
-}
-
-/**
- * stripe_create - If a block-size is specified for the 'name', create the
- *    file in all the child nodes. If not, create it in only first child.
- *
- * @name- complete path of the file to be created.
- */
-int32_t
-stripe_create(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-              mode_t mode, mode_t umask, fd_t *fd, dict_t *xdata)
-{
-    stripe_private_t *priv = NULL;
-    stripe_local_t *local = NULL;
-    int32_t op_errno = EINVAL;
-    int ret = 0;
-    int need_unref = 0;
-    int i = 0;
-    dict_t *dict = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-
-    /* files created in O_APPEND mode does not allow lseek() on fd */
-    flags &= ~O_APPEND;
-
-    if (priv->first_child_down || priv->nodes_down) {
-        gf_log(this->name, GF_LOG_DEBUG, "First node down, returning EIO");
-        op_errno = EIO;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    local->op_errno = ENOTCONN;
-    local->stripe_size = stripe_get_matching_bs(loc->path, priv);
-    frame->local = local;
-    local->inode = inode_ref(loc->inode);
-    loc_copy(&local->loc, loc);
-    local->fd = fd_ref(fd);
-    local->flags = flags;
-    local->mode = mode;
-    local->umask = umask;
-    if (xdata)
-        local->xattr = dict_ref(xdata);
-
-    local->call_count = priv->child_count;
-    /* Send a setxattr request to nodes where the
-       files are created */
-
-    if (priv->xattr_supported) {
-        dict = dict_new();
-        if (!dict) {
-            gf_log(this->name, GF_LOG_ERROR, "failed to allocate dict %s",
-                   loc->path);
-        }
-        need_unref = 1;
-
-        dict_copy(xdata, dict);
-
-        ret = stripe_xattr_request_build(this, dict, local->stripe_size,
-                                         priv->child_count, i, priv->coalesce);
-        if (ret)
-            gf_log(this->name, GF_LOG_ERROR, "failed to build xattr request");
-    } else {
-        dict = xdata;
-    }
-
-    STACK_WIND(frame, stripe_first_create_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->create, loc, flags, mode, umask, fd,
-               dict);
-
-    if (need_unref && dict)
-        dict_unref(dict);
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(create, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                        NULL, xdata);
-    return 0;
-}
-
-int32_t
-stripe_open_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-            local->op_errno = op_errno;
-        }
-
-        if (op_ret >= 0)
-            local->op_ret = op_ret;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        STRIPE_STACK_UNWIND(open, frame, local->op_ret, local->op_errno,
-                            local->fd, xdata);
-    }
-out:
-    return 0;
-}
-
-/**
- * stripe_open -
- */
-int32_t
-stripe_open(call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-            fd_t *fd, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    /* files opened in O_APPEND mode does not allow lseek() on fd */
-    flags &= ~O_APPEND;
-
-    local->fd = fd_ref(fd);
-    frame->local = local;
-    loc_copy(&local->loc, loc);
-
-    /* Striped files */
-    local->flags = flags;
-    local->call_count = priv->child_count;
-    local->stripe_size = stripe_get_matching_bs(loc->path, priv);
-
-    while (trav) {
-        STACK_WIND(frame, stripe_open_cbk, trav->xlator,
-                   trav->xlator->fops->open, &local->loc, local->flags,
-                   local->fd, xdata);
-        trav = trav->next;
-    }
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(open, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_opendir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, fd_t *fd, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_ret = -1;
-            local->op_errno = op_errno;
-        }
-
-        if (op_ret >= 0)
-            local->op_ret = op_ret;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        STRIPE_STACK_UNWIND(opendir, frame, local->op_ret, local->op_errno,
-                            local->fd, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_opendir(call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd,
-               dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-    local->call_count = priv->child_count;
-    local->fd = fd_ref(fd);
-
-    while (trav) {
-        STACK_WIND(frame, stripe_opendir_cbk, trav->xlator,
-                   trav->xlator->fops->opendir, loc, fd, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(opendir, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_lk_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
-              int32_t op_errno, struct gf_flock *lock, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-        if (op_ret >= 0) {
-            if (FIRST_CHILD(this) == prev->this) {
-                /* First successful call, copy the *lock */
-                local->op_ret = op_ret;
-                local->lock = *lock;
-            }
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-        STRIPE_STACK_UNWIND(lk, frame, local->op_ret, local->op_errno,
-                            &local->lock, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_lk(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t cmd,
-          struct gf_flock *lock, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    trav = this->children;
-    priv = this->private;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_lk_cbk, trav->xlator, trav->xlator->fops->lk,
-                   fd, cmd, lock, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(lk, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_flush_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-                   strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-        if (op_ret >= 0)
-            local->op_ret = op_ret;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        STRIPE_STACK_UNWIND(flush, frame, local->op_ret, local->op_errno, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_flush(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_flush_cbk, trav->xlator,
-                   trav->xlator->fops->flush, fd, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(flush, frame, -1, op_errno, NULL);
-    return 0;
-}
-
-int32_t
-stripe_fsync_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                 struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-                   strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-        if (op_ret >= 0) {
-            local->op_ret = op_ret;
-            if (FIRST_CHILD(this) == prev->this) {
-                local->pre_buf = *prebuf;
-                local->post_buf = *postbuf;
-            }
-            local->prebuf_blocks += prebuf->ia_blocks;
-            local->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, local->fctx, prev);
-            correct_file_size(postbuf, local->fctx, prev);
-
-            if (local->prebuf_size < prebuf->ia_size)
-                local->prebuf_size = prebuf->ia_size;
-
-            if (local->postbuf_size < postbuf->ia_size)
-                local->postbuf_size = postbuf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->pre_buf.ia_blocks = local->prebuf_blocks;
-            local->pre_buf.ia_size = local->prebuf_size;
-            local->post_buf.ia_blocks = local->postbuf_blocks;
-            local->post_buf.ia_size = local->postbuf_size;
-        }
-
-        STRIPE_STACK_UNWIND(fsync, frame, local->op_ret, local->op_errno,
-                            &local->pre_buf, &local->post_buf, NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_fsync(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags,
-             dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    frame->local = local;
-
-    inode_ctx_get(fd->inode, this, (uint64_t *)&fctx);
-    if (!fctx) {
-        op_errno = EINVAL;
-        goto err;
-    }
-    local->fctx = fctx;
-    local->op_ret = -1;
-    local->call_count = priv->child_count;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_fsync_cbk, trav->xlator,
-                   trav->xlator->fops->fsync, fd, flags, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fsync, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_fstat_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, struct iatt *buf,
-                 dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned error %s",
-                   prev->this->name, strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-
-        if (op_ret == 0) {
-            local->op_ret = 0;
-
-            if (FIRST_CHILD(this) == prev->this)
-                local->stbuf = *buf;
-
-            local->stbuf_blocks += buf->ia_blocks;
-
-            correct_file_size(buf, local->fctx, prev);
-
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        if (local->op_ret != -1) {
-            local->stbuf.ia_size = local->stbuf_size;
-            local->stbuf.ia_blocks = local->stbuf_blocks;
-        }
-
-        STRIPE_STACK_UNWIND(fstat, frame, local->op_ret, local->op_errno,
-                            &local->stbuf, NULL);
-    }
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_fstat(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    if (IA_ISREG(fd->inode->ia_type)) {
-        inode_ctx_get(fd->inode, this, (uint64_t *)&fctx);
-        if (!fctx)
-            goto err;
-        local->fctx = fctx;
-    }
-
-    while (trav) {
-        STACK_WIND(frame, stripe_fstat_cbk, trav->xlator,
-                   trav->xlator->fops->fstat, fd, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fstat, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-                 dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int i, eof_idx;
-    off_t dest_offset, tmp_offset;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    inode_ctx_get(fd->inode, this, (uint64_t *)&fctx);
-    if (!fctx) {
-        gf_log(this->name, GF_LOG_ERROR, "no stripe context");
-        op_errno = EINVAL;
-        goto err;
-    }
-    if (!fctx->stripe_count) {
-        gf_log(this->name, GF_LOG_ERROR, "no stripe count");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    local->fctx = fctx;
-    eof_idx = (offset / fctx->stripe_size) % fctx->stripe_count;
-
-    for (i = 0; i < fctx->stripe_count; i++) {
-        if (!fctx->xl_array[i]) {
-            gf_log(this->name, GF_LOG_ERROR,
-                   "no xlator at index "
-                   "%d",
-                   i);
-            op_errno = EINVAL;
-            goto err;
-        }
-
-        if (fctx->stripe_coalesce) {
-            if (i < eof_idx)
-                tmp_offset = gf_roof(offset,
-                                     fctx->stripe_size * fctx->stripe_count);
-            else if (i > eof_idx)
-                tmp_offset = gf_floor(offset,
-                                      fctx->stripe_size * fctx->stripe_count);
-            else
-                tmp_offset = offset;
-
-            dest_offset = coalesced_offset(tmp_offset, fctx->stripe_size,
-                                           fctx->stripe_count);
-        } else {
-            dest_offset = offset;
-        }
-
-        STACK_WIND(frame, stripe_truncate_cbk, fctx->xl_array[i],
-                   fctx->xl_array[i]->fops->ftruncate, fd, dest_offset, NULL);
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(ftruncate, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_fsyncdir_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-
-        if (op_ret == -1) {
-            gf_log(this->name, GF_LOG_DEBUG, "%s returned %s", prev->this->name,
-                   strerror(op_errno));
-            local->op_errno = op_errno;
-            if ((op_errno != ENOENT) || (prev->this == FIRST_CHILD(this)))
-                local->failed = 1;
-        }
-        if (op_ret >= 0)
-            local->op_ret = op_ret;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (local->failed)
-            local->op_ret = -1;
-
-        STRIPE_STACK_UNWIND(fsyncdir, frame, local->op_ret, local->op_errno,
-                            NULL);
-    }
-out:
-    return 0;
-}
-
-int32_t
-stripe_fsyncdir(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags,
-                dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    int32_t op_errno = 1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    local->call_count = priv->child_count;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_fsyncdir_cbk, trav->xlator,
-                   trav->xlator->fops->fsyncdir, fd, flags, NULL);
-        trav = trav->next;
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fsyncdir, frame, -1, op_errno, NULL);
-    return 0;
-}
-
-int32_t
-stripe_readv_fstat_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, struct iatt *buf,
-                       dict_t *xdata)
-{
-    int32_t i = 0;
-    int32_t callcnt = 0;
-    int32_t count = 0;
-    stripe_local_t *local = NULL;
-    struct iovec *vec = NULL;
-    struct iatt tmp_stbuf = {
-        0,
-    };
-    struct iobref *tmp_iobref = NULL;
-    struct iobuf *iobuf = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    local = frame->local;
-    prev = cookie;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->call_count;
-        if (op_ret != -1) {
-            correct_file_size(buf, local->fctx, prev);
-            if (local->stbuf_size < buf->ia_size)
-                local->stbuf_size = buf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        op_ret = 0;
-
-        /* Keep extra space for filling in '\0's */
-        vec = GF_CALLOC((local->count * 2), sizeof(struct iovec),
-                        gf_stripe_mt_iovec);
-        if (!vec) {
-            op_ret = -1;
-            goto done;
-        }
-
-        for (i = 0; i < local->wind_count; i++) {
-            if (local->replies[i].op_ret) {
-                memcpy((vec + count), local->replies[i].vector,
-                       (local->replies[i].count * sizeof(struct iovec)));
-                count += local->replies[i].count;
-                op_ret += local->replies[i].op_ret;
-            }
-            if ((local->replies[i].op_ret < local->replies[i].requested_size) &&
-                (local->stbuf_size > (local->offset + op_ret))) {
-                /* Fill in 0s here */
-                vec[count].iov_len = (local->replies[i].requested_size -
-                                      local->replies[i].op_ret);
-                iobuf = iobuf_get2(this->ctx->iobuf_pool, vec[count].iov_len);
-                if (!iobuf) {
-                    gf_log(this->name, GF_LOG_ERROR, "Out of memory.");
-                    op_ret = -1;
-                    op_errno = ENOMEM;
-                    goto done;
-                }
-                memset(iobuf->ptr, 0, vec[count].iov_len);
-                vec[count].iov_base = iobuf->ptr;
-
-                iobref_add(local->iobref, iobuf);
-                iobuf_unref(iobuf);
-
-                op_ret += vec[count].iov_len;
-                count++;
-            }
-            GF_FREE(local->replies[i].vector);
-        }
-
-        /* ENOENT signals EOF to the NFS-server */
-        if (op_ret != -1 && op_ret < local->readv_size &&
-            (local->offset + op_ret == buf->ia_size))
-            op_errno = ENOENT;
-
-        /* FIXME: notice that st_ino, and st_dev (gen) will be
-         * different than what inode will have. Make sure this doesn't
-         * cause any bugs at higher levels */
-        memcpy(&tmp_stbuf, &local->replies[0].stbuf, sizeof(struct iatt));
-        tmp_stbuf.ia_size = local->stbuf_size;
-
-    done:
-        GF_FREE(local->replies);
-        tmp_iobref = local->iobref;
-        STRIPE_STACK_UNWIND(readv, frame, op_ret, op_errno, vec, count,
-                            &tmp_stbuf, tmp_iobref, NULL);
-
-        iobref_unref(tmp_iobref);
-        GF_FREE(vec);
-    }
-out:
-    return 0;
-}
-
-/**
- * stripe_readv_cbk - get all the striped reads, and order it properly, send it
- *        to above layer after putting it in a single vector.
- */
-int32_t
-stripe_readv_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, struct iovec *vector,
-                 int32_t count, struct iatt *stbuf, struct iobref *iobref,
-                 dict_t *xdata)
-{
-    int32_t index = 0;
-    int32_t callcnt = 0;
-    int32_t final_count = 0;
-    int32_t need_to_check_proper_size = 0;
-    call_frame_t *mframe = NULL;
-    stripe_local_t *mlocal = NULL;
-    stripe_local_t *local = NULL;
-    struct iovec *final_vec = NULL;
-    struct iatt tmp_stbuf = {
-        0,
-    };
-    struct iatt *tmp_stbuf_p = NULL;  // need it for a warning
-    struct iobref *tmp_iobref = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    call_frame_t *prev = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto end;
-    }
-
-    local = frame->local;
-    index = local->node_index;
-    prev = cookie;
-    mframe = local->orig_frame;
-    if (!mframe)
-        goto out;
-
-    mlocal = mframe->local;
-    if (!mlocal)
-        goto out;
-
-    fctx = mlocal->fctx;
-
-    LOCK(&mframe->lock);
-    {
-        mlocal->replies[index].op_ret = op_ret;
-        mlocal->replies[index].op_errno = op_errno;
-        mlocal->replies[index].requested_size = local->readv_size;
-        if (op_ret >= 0) {
-            mlocal->replies[index].stbuf = *stbuf;
-            mlocal->replies[index].count = count;
-            mlocal->replies[index].vector = iov_dup(vector, count);
-
-            correct_file_size(stbuf, fctx, prev);
-
-            if (local->stbuf_size < stbuf->ia_size)
-                local->stbuf_size = stbuf->ia_size;
-            local->stbuf_blocks += stbuf->ia_blocks;
-
-            if (!mlocal->iobref)
-                mlocal->iobref = iobref_new();
-            iobref_merge(mlocal->iobref, iobref);
-        }
-        callcnt = ++mlocal->call_count;
-    }
-    UNLOCK(&mframe->lock);
-
-    if (callcnt == mlocal->wind_count) {
-        op_ret = 0;
-
-        for (index = 0; index < mlocal->wind_count; index++) {
-            /* check whether each stripe returned
-             * 'expected' number of bytes */
-            if (mlocal->replies[index].op_ret == -1) {
-                op_ret = -1;
-                op_errno = mlocal->replies[index].op_errno;
-                break;
-            }
-            /* TODO: handle the 'holes' within the read range
-               properly */
-            if (mlocal->replies[index].op_ret <
-                mlocal->replies[index].requested_size) {
-                need_to_check_proper_size = 1;
-            }
-
-            op_ret += mlocal->replies[index].op_ret;
-            mlocal->count += mlocal->replies[index].count;
-        }
-        if (op_ret == -1)
-            goto done;
-        if (need_to_check_proper_size)
-            goto check_size;
-
-        final_vec = GF_CALLOC(mlocal->count, sizeof(struct iovec),
-                              gf_stripe_mt_iovec);
-
-        if (!final_vec) {
-            op_ret = -1;
-            goto done;
-        }
-
-        for (index = 0; index < mlocal->wind_count; index++) {
-            memcpy((final_vec + final_count), mlocal->replies[index].vector,
-                   (mlocal->replies[index].count * sizeof(struct iovec)));
-            final_count += mlocal->replies[index].count;
-            GF_FREE(mlocal->replies[index].vector);
-        }
-
-        /* FIXME: notice that st_ino, and st_dev (gen) will be
-         * different than what inode will have. Make sure this doesn't
-         * cause any bugs at higher levels */
-        memcpy(&tmp_stbuf, &mlocal->replies[0].stbuf, sizeof(struct iatt));
-        tmp_stbuf.ia_size = local->stbuf_size;
-        tmp_stbuf.ia_blocks = local->stbuf_blocks;
-
-    done:
-        /* */
-        GF_FREE(mlocal->replies);
-        tmp_iobref = mlocal->iobref;
-        /* work around for nfs truncated read. Bug 3774 */
-        tmp_stbuf_p = &tmp_stbuf;
-        WIPE(tmp_stbuf_p);
-        STRIPE_STACK_UNWIND(readv, mframe, op_ret, op_errno, final_vec,
-                            final_count, &tmp_stbuf, tmp_iobref, NULL);
-
-        iobref_unref(tmp_iobref);
-        GF_FREE(final_vec);
-    }
-
-    goto out;
-
-check_size:
-    mlocal->call_count = fctx->stripe_count;
-
-    for (index = 0; index < fctx->stripe_count; index++) {
-        STACK_WIND(mframe, stripe_readv_fstat_cbk, (fctx->xl_array[index]),
-                   (fctx->xl_array[index])->fops->fstat, mlocal->fd, NULL);
-    }
-
-out:
-    STRIPE_STACK_DESTROY(frame);
-end:
-    return 0;
-}
-
-int32_t
-stripe_readv(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-             off_t offset, uint32_t flags, dict_t *xdata)
-{
-    int32_t op_errno = EINVAL;
-    int32_t idx = 0;
-    int32_t index = 0;
-    int32_t num_stripe = 0;
-    int32_t off_index = 0;
-    size_t frame_size = 0;
-    off_t rounded_end = 0;
-    uint64_t tmp_fctx = 0;
-    uint64_t stripe_size = 0;
-    off_t rounded_start = 0;
-    off_t frame_offset = offset;
-    off_t dest_offset = 0;
-    stripe_local_t *local = NULL;
-    call_frame_t *rframe = NULL;
-    stripe_local_t *rlocal = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    inode_ctx_get(fd->inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        op_errno = EBADFD;
-        goto err;
-    }
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-    stripe_size = fctx->stripe_size;
-
-    STRIPE_VALIDATE_FCTX(fctx, err);
-
-    if (!stripe_size) {
-        gf_log(this->name, GF_LOG_DEBUG, "Wrong stripe size for the file");
-        goto err;
-    }
-    /* The file is stripe across the child nodes. Send the read request
-     * to the child nodes appropriately after checking which region of
-     * the file is in which child node. Always '0-<stripe_size>' part of
-     * the file resides in the first child.
-     */
-    rounded_start = gf_floor(offset, stripe_size);
-    rounded_end = gf_roof(offset + size, stripe_size);
-    num_stripe = (rounded_end - rounded_start) / stripe_size;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-
-    /* This is where all the vectors should be copied. */
-    local->replies = GF_CALLOC(num_stripe, sizeof(struct stripe_replies),
-                               gf_stripe_mt_stripe_replies);
-    if (!local->replies) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    off_index = (offset / stripe_size) % fctx->stripe_count;
-    local->wind_count = num_stripe;
-    local->readv_size = size;
-    local->offset = offset;
-    local->fd = fd_ref(fd);
-    local->fctx = fctx;
-
-    for (index = off_index; index < (num_stripe + off_index); index++) {
-        rframe = copy_frame(frame);
-        rlocal = mem_get0(this->local_pool);
-        if (!rlocal) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-
-        frame_size = min(gf_roof(frame_offset + 1, stripe_size),
-                         (offset + size)) -
-                     frame_offset;
-
-        rlocal->node_index = index - off_index;
-        rlocal->orig_frame = frame;
-        rlocal->readv_size = frame_size;
-        rframe->local = rlocal;
-        idx = (index % fctx->stripe_count);
-
-        if (fctx->stripe_coalesce)
-            dest_offset = coalesced_offset(frame_offset, stripe_size,
-                                           fctx->stripe_count);
-        else
-            dest_offset = frame_offset;
-
-        STACK_WIND(rframe, stripe_readv_cbk, fctx->xl_array[idx],
-                   fctx->xl_array[idx]->fops->readv, fd, frame_size,
-                   dest_offset, flags, xdata);
-
-        frame_offset += frame_size;
-    }
-
-    return 0;
-err:
-    if (rframe)
-        STRIPE_STACK_DESTROY(rframe);
-
-    STRIPE_STACK_UNWIND(readv, frame, -1, op_errno, NULL, 0, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_writev_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                  int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                  struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_local_t *mlocal = NULL;
-    call_frame_t *prev = NULL;
-    call_frame_t *mframe = NULL;
-    struct stripe_replies *reply = NULL;
-    int32_t i = 0;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-    mframe = local->orig_frame;
-    mlocal = mframe->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = ++mlocal->call_count;
-
-        mlocal->replies[local->node_index].op_ret = op_ret;
-        mlocal->replies[local->node_index].op_errno = op_errno;
-
-        if (op_ret >= 0) {
-            mlocal->post_buf = *postbuf;
-            mlocal->pre_buf = *prebuf;
-
-            mlocal->prebuf_blocks += prebuf->ia_blocks;
-            mlocal->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, mlocal->fctx, prev);
-            correct_file_size(postbuf, mlocal->fctx, prev);
-
-            if (mlocal->prebuf_size < prebuf->ia_size)
-                mlocal->prebuf_size = prebuf->ia_size;
-            if (mlocal->postbuf_size < postbuf->ia_size)
-                mlocal->postbuf_size = postbuf->ia_size;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if ((callcnt == mlocal->wind_count) && mlocal->unwind) {
-        mlocal->pre_buf.ia_size = mlocal->prebuf_size;
-        mlocal->pre_buf.ia_blocks = mlocal->prebuf_blocks;
-        mlocal->post_buf.ia_size = mlocal->postbuf_size;
-        mlocal->post_buf.ia_blocks = mlocal->postbuf_blocks;
-
-        /*
-         * Only return the number of consecutively written bytes up until
-         * the first error. Only return an error if it occurs first.
-         *
-         * When a short write occurs, the application should retry at the
-         * appropriate offset, at which point we'll potentially pass back
-         * the error.
-         */
-        for (i = 0, reply = mlocal->replies; i < mlocal->wind_count;
-             i++, reply++) {
-            if (reply->op_ret == -1) {
-                gf_log(this->name, GF_LOG_DEBUG,
-                       "reply %d "
-                       "returned error %s",
-                       i, strerror(reply->op_errno));
-                if (!mlocal->op_ret) {
-                    mlocal->op_ret = -1;
-                    mlocal->op_errno = reply->op_errno;
-                }
-                break;
-            }
-
-            mlocal->op_ret += reply->op_ret;
-
-            if (reply->op_ret < reply->requested_size)
-                break;
-        }
-
-        GF_FREE(mlocal->replies);
-
-        STRIPE_STACK_UNWIND(writev, mframe, mlocal->op_ret, mlocal->op_errno,
-                            &mlocal->pre_buf, &mlocal->post_buf, NULL);
-    }
-out:
-    if (frame)
-        STRIPE_STACK_DESTROY(frame);
-    return 0;
-}
-
-int32_t
-stripe_writev(call_frame_t *frame, xlator_t *this, fd_t *fd,
-              struct iovec *vector, int32_t count, off_t offset, uint32_t flags,
-              struct iobref *iobref, dict_t *xdata)
-{
-    struct iovec *tmp_vec = NULL;
-    stripe_local_t *local = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-    int32_t idx = 0;
-    int32_t total_size = 0;
-    int32_t offset_offset = 0;
-    int32_t remaining_size = 0;
-    int32_t tmp_count = count;
-    off_t fill_size = 0;
-    uint64_t stripe_size = 0;
-    uint64_t tmp_fctx = 0;
-    off_t dest_offset = 0;
-    off_t rounded_start = 0;
-    off_t rounded_end = 0;
-    int32_t total_chunks = 0;
-    call_frame_t *wframe = NULL;
-    stripe_local_t *wlocal = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    inode_ctx_get(fd->inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        op_errno = EINVAL;
-        goto err;
-    }
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-    stripe_size = fctx->stripe_size;
-
-    STRIPE_VALIDATE_FCTX(fctx, err);
-
-    /* File has to be stripped across the child nodes */
-    total_size = iov_length(vector, count);
-    remaining_size = total_size;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-    local->stripe_size = stripe_size;
-    local->fctx = fctx;
-
-    if (!stripe_size) {
-        gf_log(this->name, GF_LOG_DEBUG, "Wrong stripe size for the file");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    rounded_start = gf_floor(offset, stripe_size);
-    rounded_end = gf_roof(offset + total_size, stripe_size);
-    total_chunks = (rounded_end - rounded_start) / stripe_size;
-    local->replies = GF_CALLOC(total_chunks, sizeof(struct stripe_replies),
-                               gf_stripe_mt_stripe_replies);
-    if (!local->replies) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    total_chunks = 0;
-    while (1) {
-        wframe = copy_frame(frame);
-        wlocal = mem_get0(this->local_pool);
-        if (!wlocal) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        wlocal->orig_frame = frame;
-        wframe->local = wlocal;
-
-        /* Send striped chunk of the vector to child
-           nodes appropriately. */
-        idx = (((offset + offset_offset) / local->stripe_size) %
-               fctx->stripe_count);
-
-        fill_size = (local->stripe_size -
-                     ((offset + offset_offset) % local->stripe_size));
-        if (fill_size > remaining_size)
-            fill_size = remaining_size;
-
-        remaining_size -= fill_size;
-
-        tmp_count = iov_subset(vector, count, offset_offset,
-                               offset_offset + fill_size, NULL);
-        tmp_vec = GF_CALLOC(tmp_count, sizeof(struct iovec),
-                            gf_stripe_mt_iovec);
-        if (!tmp_vec) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        tmp_count = iov_subset(vector, count, offset_offset,
-                               offset_offset + fill_size, tmp_vec);
-
-        local->wind_count++;
-        if (remaining_size == 0)
-            local->unwind = 1;
-
-        /*
-         * Store off the request index (with respect to the chunk of the
-         * initial offset) and the size of the request. This is required
-         * in the callback to calculate an appropriate return value in
-         * the event of a write failure in one or more requests.
-         */
-        wlocal->node_index = total_chunks;
-        local->replies[total_chunks].requested_size = fill_size;
-
-        dest_offset = offset + offset_offset;
-        if (fctx->stripe_coalesce)
-            dest_offset = coalesced_offset(dest_offset, local->stripe_size,
-                                           fctx->stripe_count);
-
-        STACK_WIND(wframe, stripe_writev_cbk, fctx->xl_array[idx],
-                   fctx->xl_array[idx]->fops->writev, fd, tmp_vec, tmp_count,
-                   dest_offset, flags, iobref, xdata);
-
-        GF_FREE(tmp_vec);
-        offset_offset += fill_size;
-        total_chunks++;
-        if (remaining_size == 0)
-            break;
-    }
-
-    return 0;
-err:
-    if (wframe)
-        STRIPE_STACK_DESTROY(wframe);
-
-    STRIPE_STACK_UNWIND(writev, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_fallocate_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                     struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_local_t *mlocal = NULL;
-    call_frame_t *prev = NULL;
-    call_frame_t *mframe = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-    mframe = local->orig_frame;
-    mlocal = mframe->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = ++mlocal->call_count;
-
-        if (op_ret == 0) {
-            mlocal->post_buf = *postbuf;
-            mlocal->pre_buf = *prebuf;
-
-            mlocal->prebuf_blocks += prebuf->ia_blocks;
-            mlocal->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, mlocal->fctx, prev);
-            correct_file_size(postbuf, mlocal->fctx, prev);
-
-            if (mlocal->prebuf_size < prebuf->ia_size)
-                mlocal->prebuf_size = prebuf->ia_size;
-            if (mlocal->postbuf_size < postbuf->ia_size)
-                mlocal->postbuf_size = postbuf->ia_size;
-        }
-
-        /* return the first failure */
-        if (mlocal->op_ret == 0) {
-            mlocal->op_ret = op_ret;
-            mlocal->op_errno = op_errno;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if ((callcnt == mlocal->wind_count) && mlocal->unwind) {
-        mlocal->pre_buf.ia_size = mlocal->prebuf_size;
-        mlocal->pre_buf.ia_blocks = mlocal->prebuf_blocks;
-        mlocal->post_buf.ia_size = mlocal->postbuf_size;
-        mlocal->post_buf.ia_blocks = mlocal->postbuf_blocks;
-
-        STRIPE_STACK_UNWIND(fallocate, mframe, mlocal->op_ret, mlocal->op_errno,
-                            &mlocal->pre_buf, &mlocal->post_buf, NULL);
-    }
-out:
-    if (frame)
-        STRIPE_STACK_DESTROY(frame);
-    return 0;
-}
-
-int32_t
-stripe_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode,
-                 off_t offset, size_t len, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-    int32_t idx = 0;
-    int32_t offset_offset = 0;
-    int32_t remaining_size = 0;
-    off_t fill_size = 0;
-    uint64_t stripe_size = 0;
-    uint64_t tmp_fctx = 0;
-    off_t dest_offset = 0;
-    call_frame_t *fframe = NULL;
-    stripe_local_t *flocal = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    inode_ctx_get(fd->inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        op_errno = EINVAL;
-        goto err;
-    }
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-    stripe_size = fctx->stripe_size;
-
-    STRIPE_VALIDATE_FCTX(fctx, err);
-
-    remaining_size = len;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-    local->stripe_size = stripe_size;
-    local->fctx = fctx;
-
-    if (!stripe_size) {
-        gf_log(this->name, GF_LOG_DEBUG, "Wrong stripe size for the file");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    while (1) {
-        fframe = copy_frame(frame);
-        flocal = mem_get0(this->local_pool);
-        if (!flocal) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        flocal->orig_frame = frame;
-        fframe->local = flocal;
-
-        /* send fallocate request to the associated child node */
-        idx = (((offset + offset_offset) / local->stripe_size) %
-               fctx->stripe_count);
-
-        fill_size = (local->stripe_size -
-                     ((offset + offset_offset) % local->stripe_size));
-        if (fill_size > remaining_size)
-            fill_size = remaining_size;
-
-        remaining_size -= fill_size;
-
-        local->wind_count++;
-        if (remaining_size == 0)
-            local->unwind = 1;
-
-        dest_offset = offset + offset_offset;
-        if (fctx->stripe_coalesce)
-            dest_offset = coalesced_offset(dest_offset, local->stripe_size,
-                                           fctx->stripe_count);
-
-        /*
-         * TODO: Create a separate handler for coalesce mode that sends a
-         * single fallocate per-child (since the ranges are linear).
-         */
-        STACK_WIND(fframe, stripe_fallocate_cbk, fctx->xl_array[idx],
-                   fctx->xl_array[idx]->fops->fallocate, fd, mode, dest_offset,
-                   fill_size, xdata);
-
-        offset_offset += fill_size;
-        if (remaining_size == 0)
-            break;
-    }
-
-    return 0;
-err:
-    if (fframe)
-        STRIPE_STACK_DESTROY(fframe);
-
-    STRIPE_STACK_UNWIND(fallocate, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_discard_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                   int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                   struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_local_t *mlocal = NULL;
-    call_frame_t *prev = NULL;
-    call_frame_t *mframe = NULL;
-
-    if (!this || !frame || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-    mframe = local->orig_frame;
-    mlocal = mframe->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = ++mlocal->call_count;
-
-        if (op_ret == 0) {
-            mlocal->post_buf = *postbuf;
-            mlocal->pre_buf = *prebuf;
-
-            mlocal->prebuf_blocks += prebuf->ia_blocks;
-            mlocal->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, mlocal->fctx, prev);
-            correct_file_size(postbuf, mlocal->fctx, prev);
-
-            if (mlocal->prebuf_size < prebuf->ia_size)
-                mlocal->prebuf_size = prebuf->ia_size;
-            if (mlocal->postbuf_size < postbuf->ia_size)
-                mlocal->postbuf_size = postbuf->ia_size;
-        }
-
-        /* return the first failure */
-        if (mlocal->op_ret == 0) {
-            mlocal->op_ret = op_ret;
-            mlocal->op_errno = op_errno;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if ((callcnt == mlocal->wind_count) && mlocal->unwind) {
-        mlocal->pre_buf.ia_size = mlocal->prebuf_size;
-        mlocal->pre_buf.ia_blocks = mlocal->prebuf_blocks;
-        mlocal->post_buf.ia_size = mlocal->postbuf_size;
-        mlocal->post_buf.ia_blocks = mlocal->postbuf_blocks;
-
-        STRIPE_STACK_UNWIND(discard, mframe, mlocal->op_ret, mlocal->op_errno,
-                            &mlocal->pre_buf, &mlocal->post_buf, NULL);
-    }
-out:
-    if (frame)
-        STRIPE_STACK_DESTROY(frame);
-
-    return 0;
-}
-
-int32_t
-stripe_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-               size_t len, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-    int32_t idx = 0;
-    int32_t offset_offset = 0;
-    int32_t remaining_size = 0;
-    off_t fill_size = 0;
-    uint64_t stripe_size = 0;
-    uint64_t tmp_fctx = 0;
-    off_t dest_offset = 0;
-    call_frame_t *fframe = NULL;
-    stripe_local_t *flocal = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    inode_ctx_get(fd->inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        op_errno = EINVAL;
-        goto err;
-    }
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-    stripe_size = fctx->stripe_size;
-
-    STRIPE_VALIDATE_FCTX(fctx, err);
-
-    remaining_size = len;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-    local->stripe_size = stripe_size;
-    local->fctx = fctx;
-
-    if (!stripe_size) {
-        gf_log(this->name, GF_LOG_DEBUG, "Wrong stripe size for the file");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    while (1) {
-        fframe = copy_frame(frame);
-        flocal = mem_get0(this->local_pool);
-        if (!flocal) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        flocal->orig_frame = frame;
-        fframe->local = flocal;
-
-        /* send discard request to the associated child node */
-        idx = (((offset + offset_offset) / local->stripe_size) %
-               fctx->stripe_count);
-
-        fill_size = (local->stripe_size -
-                     ((offset + offset_offset) % local->stripe_size));
-        if (fill_size > remaining_size)
-            fill_size = remaining_size;
-
-        remaining_size -= fill_size;
-
-        local->wind_count++;
-        if (remaining_size == 0)
-            local->unwind = 1;
-
-        dest_offset = offset + offset_offset;
-        if (fctx->stripe_coalesce)
-            dest_offset = coalesced_offset(dest_offset, local->stripe_size,
-                                           fctx->stripe_count);
-
-        /*
-         * TODO: Create a separate handler for coalesce mode that sends a
-         * single discard per-child (since the ranges are linear).
-         */
-        STACK_WIND(fframe, stripe_discard_cbk, fctx->xl_array[idx],
-                   fctx->xl_array[idx]->fops->discard, fd, dest_offset,
-                   fill_size, xdata);
-
-        offset_offset += fill_size;
-        if (remaining_size == 0)
-            break;
-    }
-
-    return 0;
-err:
-    if (fframe)
-        STRIPE_STACK_DESTROY(fframe);
-
-    STRIPE_STACK_UNWIND(discard, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_zerofill_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
-                    struct iatt *postbuf, dict_t *xdata)
-{
-    int32_t callcnt = 0;
-    stripe_local_t *local = NULL;
-    stripe_local_t *mlocal = NULL;
-    call_frame_t *prev = NULL;
-    call_frame_t *mframe = NULL;
-
-    GF_ASSERT(frame);
-
-    if (!this || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-
-    prev = cookie;
-    local = frame->local;
-    mframe = local->orig_frame;
-    mlocal = mframe->local;
-
-    LOCK(&frame->lock);
-    {
-        callcnt = ++mlocal->call_count;
-
-        if (op_ret == 0) {
-            mlocal->post_buf = *postbuf;
-            mlocal->pre_buf = *prebuf;
-
-            mlocal->prebuf_blocks += prebuf->ia_blocks;
-            mlocal->postbuf_blocks += postbuf->ia_blocks;
-
-            correct_file_size(prebuf, mlocal->fctx, prev);
-            correct_file_size(postbuf, mlocal->fctx, prev);
-
-            if (mlocal->prebuf_size < prebuf->ia_size)
-                mlocal->prebuf_size = prebuf->ia_size;
-            if (mlocal->postbuf_size < postbuf->ia_size)
-                mlocal->postbuf_size = postbuf->ia_size;
-        }
-
-        /* return the first failure */
-        if (mlocal->op_ret == 0) {
-            mlocal->op_ret = op_ret;
-            mlocal->op_errno = op_errno;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if ((callcnt == mlocal->wind_count) && mlocal->unwind) {
-        mlocal->pre_buf.ia_size = mlocal->prebuf_size;
-        mlocal->pre_buf.ia_blocks = mlocal->prebuf_blocks;
-        mlocal->post_buf.ia_size = mlocal->postbuf_size;
-        mlocal->post_buf.ia_blocks = mlocal->postbuf_blocks;
-
-        STRIPE_STACK_UNWIND(zerofill, mframe, mlocal->op_ret, mlocal->op_errno,
-                            &mlocal->pre_buf, &mlocal->post_buf, NULL);
-    }
-out:
-    STRIPE_STACK_DESTROY(frame);
-    return 0;
-}
-
-int32_t
-stripe_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-                off_t len, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_fd_ctx_t *fctx = NULL;
-    int32_t op_errno = 1;
-    int32_t idx = 0;
-    int32_t offset_offset = 0;
-    int32_t remaining_size = 0;
-    off_t fill_size = 0;
-    uint64_t stripe_size = 0;
-    uint64_t tmp_fctx = 0;
-    off_t dest_offset = 0;
-    call_frame_t *fframe = NULL;
-    stripe_local_t *flocal = NULL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-    VALIDATE_OR_GOTO(fd->inode, err);
-
-    inode_ctx_get(fd->inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        op_errno = EINVAL;
-        goto err;
-    }
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-    stripe_size = fctx->stripe_size;
-
-    STRIPE_VALIDATE_FCTX(fctx, err);
-
-    remaining_size = len;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    frame->local = local;
-    local->stripe_size = stripe_size;
-    local->fctx = fctx;
-
-    if (!stripe_size) {
-        gf_log(this->name, GF_LOG_DEBUG, "Wrong stripe size for the file");
-        op_errno = EINVAL;
-        goto err;
-    }
-
-    while (1) {
-        fframe = copy_frame(frame);
-        flocal = mem_get0(this->local_pool);
-        if (!flocal) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-        flocal->orig_frame = frame;
-        fframe->local = flocal;
-
-        idx = (((offset + offset_offset) / local->stripe_size) %
-               fctx->stripe_count);
-
-        fill_size = (local->stripe_size -
-                     ((offset + offset_offset) % local->stripe_size));
-        if (fill_size > remaining_size)
-            fill_size = remaining_size;
-
-        remaining_size -= fill_size;
-
-        local->wind_count++;
-        if (remaining_size == 0)
-            local->unwind = 1;
-
-        dest_offset = offset + offset_offset;
-        if (fctx->stripe_coalesce)
-            dest_offset = coalesced_offset(dest_offset, local->stripe_size,
-                                           fctx->stripe_count);
-
-        STACK_WIND(fframe, stripe_zerofill_cbk, fctx->xl_array[idx],
-                   fctx->xl_array[idx]->fops->zerofill, fd, dest_offset,
-                   fill_size, xdata);
-        offset_offset += fill_size;
-        if (remaining_size == 0)
-            break;
-    }
-
-    return 0;
-err:
-    if (fframe)
-        STRIPE_STACK_DESTROY(fframe);
-
-    STRIPE_STACK_UNWIND(zerofill, frame, -1, op_errno, NULL, NULL, NULL);
-    return 0;
-}
-
-int32_t
-stripe_seek(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
-            gf_seek_what_t what, dict_t *xdata)
-{
-    /* TBD */
-    gf_log(this->name, GF_LOG_INFO, "seek called on %s.",
-           uuid_utoa(fd->inode->gfid));
-    STRIPE_STACK_UNWIND(seek, frame, -1, ENOTSUP, 0, NULL);
-    return 0;
-}
-
-int32_t
-stripe_release(xlator_t *this, fd_t *fd)
-{
-    return 0;
-}
-
-int
-stripe_forget(xlator_t *this, inode_t *inode)
-{
-    uint64_t tmp_fctx = 0;
-    stripe_fd_ctx_t *fctx = NULL;
-
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(inode, err);
-
-    (void)inode_ctx_del(inode, this, &tmp_fctx);
-    if (!tmp_fctx) {
-        goto err;
-    }
-
-    fctx = (stripe_fd_ctx_t *)(long)tmp_fctx;
-
-    if (!fctx->static_array)
-        GF_FREE(fctx->xl_array);
-
-    GF_FREE(fctx);
-err:
-    return 0;
-}
-
-int32_t
-notify(xlator_t *this, int32_t event, void *data, ...)
-{
-    stripe_private_t *priv = NULL;
-    int down_client = 0;
-    int i = 0;
-    gf_boolean_t heard_from_all_children = _gf_false;
-
-    if (!this)
-        return 0;
-
-    priv = this->private;
-    if (!priv)
-        return 0;
-
-    switch (event) {
-        case GF_EVENT_CHILD_UP: {
-            /* get an index number to set */
-            for (i = 0; i < priv->child_count; i++) {
-                if (data == priv->xl_array[i])
-                    break;
-            }
-
-            if (priv->child_count == i) {
-                gf_log(this->name, GF_LOG_ERROR,
-                       "got GF_EVENT_CHILD_UP bad subvolume %s",
-                       data ? ((xlator_t *)data)->name : NULL);
-                break;
-            }
-
-            LOCK(&priv->lock);
-            {
-                if (data == FIRST_CHILD(this))
-                    priv->first_child_down = 0;
-                priv->last_event[i] = event;
-            }
-            UNLOCK(&priv->lock);
-        } break;
-        case GF_EVENT_CHILD_CONNECTING: {
-            // 'CONNECTING' doesn't ensure its CHILD_UP, so do nothing
-            goto out;
-        }
-        case GF_EVENT_CHILD_DOWN: {
-            /* get an index number to set */
-            for (i = 0; i < priv->child_count; i++) {
-                if (data == priv->xl_array[i])
-                    break;
-            }
-
-            if (priv->child_count == i) {
-                gf_log(this->name, GF_LOG_ERROR,
-                       "got GF_EVENT_CHILD_DOWN bad subvolume %s",
-                       data ? ((xlator_t *)data)->name : NULL);
-                break;
-            }
-
-            LOCK(&priv->lock);
-            {
-                if (data == FIRST_CHILD(this))
-                    priv->first_child_down = 1;
-                priv->last_event[i] = event;
-            }
-            UNLOCK(&priv->lock);
-        } break;
-
-        default: {
-            /* */
-            default_notify(this, event, data);
-            goto out;
-        } break;
-    }
-
-    // Consider child as down if it's last_event is not CHILD_UP
-    for (i = 0, down_client = 0; i < priv->child_count; i++)
-        if (priv->last_event[i] != GF_EVENT_CHILD_UP)
-            down_client++;
-
-    LOCK(&priv->lock);
-    {
-        priv->nodes_down = down_client;
-    }
-    UNLOCK(&priv->lock);
-
-    heard_from_all_children = _gf_true;
-    for (i = 0; i < priv->child_count; i++)
-        if (!priv->last_event[i])
-            heard_from_all_children = _gf_false;
-
-    if (heard_from_all_children)
-        default_notify(this, event, data);
-out:
-    return 0;
-}
-
-int
-stripe_setxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int op_ret, int op_errno, dict_t *xdata)
-{
-    int ret = -1;
-    int call_cnt = 0;
-    stripe_local_t *local = NULL;
-
-    if (!frame || !frame->local || !this) {
-        gf_log("", GF_LOG_ERROR, "Possible NULL deref");
-        return ret;
-    }
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        call_cnt = --local->wind_count;
-
-        /**
-         * We overwrite ->op_* values here for subsequent failure
-         * conditions, hence we propagate the last errno down the
-         * stack.
-         */
-        if (op_ret < 0) {
-            local->op_ret = op_ret;
-            local->op_errno = op_errno;
-            goto unlock;
-        }
-    }
-
-unlock:
-    UNLOCK(&frame->lock);
-
-    if (!call_cnt) {
-        STRIPE_STACK_UNWIND(setxattr, frame, local->op_ret, local->op_errno,
-                            xdata);
-    }
-
-    return 0;
-}
-
-#ifdef HAVE_BD_XLATOR
-int
-stripe_is_bd(dict_t *this, char *key, data_t *value, void *data)
-{
-    gf_boolean_t *is_bd = data;
-
-    if (data == NULL)
-        return 0;
-
-    if (XATTR_IS_BD(key))
-        *is_bd = _gf_true;
-
-    return 0;
-}
-
-static gf_boolean_t
-stripe_setxattr_is_bd(dict_t *dict)
-{
-    gf_boolean_t is_bd = _gf_false;
-
-    if (dict == NULL)
-        goto out;
-
-    dict_foreach(dict, stripe_is_bd, &is_bd);
-out:
-    return is_bd;
-}
-#else
-#define stripe_setxattr_is_bd(dict) _gf_false
-#endif
-
-int
-stripe_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
-                int flags, dict_t *xdata)
-{
-    int32_t op_errno = EINVAL;
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    stripe_local_t *local = NULL;
-    int i = 0;
-    gf_boolean_t is_bd = _gf_false;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    GF_IF_INTERNAL_XATTR_GOTO("trusted.*stripe*", dict, op_errno, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    frame->local = local;
-    local->wind_count = priv->child_count;
-    local->op_ret = local->op_errno = 0;
-
-    is_bd = stripe_setxattr_is_bd(dict);
-
-    /**
-     * Set xattrs for directories on all subvolumes. Additionally
-     * this power is only given to a special client. Bd xlator
-     * also needs xattrs for regular files (ie LVs)
-     */
-    if (((frame->root->pid == GF_CLIENT_PID_GSYNCD) &&
-         IA_ISDIR(loc->inode->ia_type)) ||
-        is_bd) {
-        for (i = 0; i < priv->child_count; i++, trav = trav->next) {
-            STACK_WIND(frame, stripe_setxattr_cbk, trav->xlator,
-                       trav->xlator->fops->setxattr, loc, dict, flags, xdata);
-        }
-    } else {
-        local->wind_count = 1;
-        STACK_WIND(frame, stripe_setxattr_cbk, FIRST_CHILD(this),
-                   FIRST_CHILD(this)->fops->setxattr, loc, dict, flags, xdata);
-    }
-
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(setxattr, frame, -1, op_errno, NULL);
-    return 0;
-}
-
-int
-stripe_fsetxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                     int op_ret, int op_errno, dict_t *xdata)
-{
-    STRIPE_STACK_UNWIND(fsetxattr, frame, op_ret, op_errno, xdata);
-    return 0;
-}
-
-int
-stripe_is_special_key(dict_t *this, char *key, data_t *value, void *data)
-{
-    gf_boolean_t *is_special = NULL;
-
-    if (data == NULL) {
-        goto out;
-    }
-
-    is_special = data;
-
-    if (XATTR_IS_LOCKINFO(key) || XATTR_IS_BD(key))
-        *is_special = _gf_true;
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_fsetxattr_everyone_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                              int32_t op_ret, int32_t op_errno, dict_t *xdata)
-{
-    int call_count = 0;
-    stripe_local_t *local = NULL;
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        call_count = --local->wind_count;
-
-        if (op_ret < 0) {
-            local->op_ret = op_ret;
-            local->op_errno = op_errno;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (call_count == 0) {
-        STRIPE_STACK_UNWIND(fsetxattr, frame, local->op_ret, local->op_errno,
-                            NULL);
-    }
-    return 0;
-}
-
-int
-stripe_fsetxattr_to_everyone(call_frame_t *frame, xlator_t *this, fd_t *fd,
-                             dict_t *dict, int flags, dict_t *xdata)
-{
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    int ret = -1;
-    stripe_local_t *local = NULL;
-
-    priv = this->private;
-
-    local = mem_get0(this->local_pool);
-    if (local == NULL) {
-        goto out;
-    }
-
-    frame->local = local;
-
-    local->wind_count = priv->child_count;
-
-    trav = this->children;
-
-    while (trav) {
-        STACK_WIND(frame, stripe_fsetxattr_everyone_cbk, trav->xlator,
-                   trav->xlator->fops->fsetxattr, fd, dict, flags, xdata);
-        trav = trav->next;
-    }
-
-    ret = 0;
-out:
-    return ret;
-}
-
-static gf_boolean_t
-stripe_fsetxattr_is_special(dict_t *dict)
-{
-    gf_boolean_t is_spl = _gf_false;
-
-    if (dict == NULL) {
-        goto out;
-    }
-
-    dict_foreach(dict, stripe_is_special_key, &is_spl);
-
-out:
-    return is_spl;
-}
-
-int
-stripe_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *dict,
-                 int flags, dict_t *xdata)
-{
-    int32_t op_ret = -1, ret = -1, op_errno = EINVAL;
-    gf_boolean_t is_spl = _gf_false;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-
-    GF_IF_INTERNAL_XATTR_GOTO("trusted.*stripe*", dict, op_errno, err);
-
-    is_spl = stripe_fsetxattr_is_special(dict);
-    if (is_spl) {
-        ret = stripe_fsetxattr_to_everyone(frame, this, fd, dict, flags, xdata);
-        if (ret < 0) {
-            op_errno = ENOMEM;
-            goto err;
-        }
-
-        goto out;
-    }
-
-    STACK_WIND(frame, stripe_fsetxattr_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->fsetxattr, fd, dict, flags, xdata);
-out:
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fsetxattr, frame, op_ret, op_errno, NULL);
-    return 0;
-}
-
-int
-stripe_removexattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                       int32_t op_ret, int32_t op_errno, dict_t *xdata)
-{
-    STRIPE_STACK_UNWIND(removexattr, frame, op_ret, op_errno, xdata);
-    return 0;
-}
-
-int
-stripe_removexattr(call_frame_t *frame, xlator_t *this, loc_t *loc,
-                   const char *name, dict_t *xdata)
-{
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(this, err);
-
-    GF_IF_NATIVE_XATTR_GOTO("trusted.*stripe*", name, op_errno, err);
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(loc, err);
-
-    STACK_WIND(frame, stripe_removexattr_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->removexattr, loc, name, xdata);
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(removexattr, frame, -1, op_errno, NULL);
-    return 0;
-}
-
-int
-stripe_fremovexattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                        int32_t op_ret, int32_t op_errno, dict_t *xdata)
-{
-    STRIPE_STACK_UNWIND(fremovexattr, frame, op_ret, op_errno, xdata);
-    return 0;
-}
-
-int
-stripe_fremovexattr(call_frame_t *frame, xlator_t *this, fd_t *fd,
-                    const char *name, dict_t *xdata)
-{
-    int32_t op_ret = -1;
-    int32_t op_errno = EINVAL;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-
-    GF_IF_NATIVE_XATTR_GOTO("trusted.*stripe*", name, op_errno, err);
-
-    STACK_WIND(frame, stripe_fremovexattr_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->fremovexattr, fd, name, xdata);
-    return 0;
-err:
-    STRIPE_STACK_UNWIND(fremovexattr, frame, op_ret, op_errno, xdata);
-    return 0;
-}
-
-int32_t
-stripe_readdirp_lookup_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                           int op_ret, int op_errno, inode_t *inode,
-                           struct iatt *stbuf, dict_t *xattr,
-                           struct iatt *parent)
-{
-    stripe_local_t *local = NULL;
-    call_frame_t *main_frame = NULL;
-    stripe_local_t *main_local = NULL;
-    gf_dirent_t *entry = NULL;
-    call_frame_t *prev = NULL;
-    int done = 0;
-
-    local = frame->local;
-    prev = cookie;
-
-    entry = local->dirent;
-
-    main_frame = local->orig_frame;
-    main_local = main_frame->local;
-    LOCK(&frame->lock);
-    {
-        local->call_count--;
-        if (!local->call_count)
-            done = 1;
-        if (op_ret == -1) {
-            local->op_errno = op_errno;
-            local->op_ret = op_ret;
-            goto unlock;
-        }
-
-        if (stripe_ctx_handle(this, prev, local, xattr))
-            gf_log(this->name, GF_LOG_ERROR,
-                   "Error getting fctx info from dict.");
-
-        correct_file_size(stbuf, local->fctx, prev);
-
-        stripe_iatt_merge(stbuf, &entry->d_stat);
-        local->stbuf_blocks += stbuf->ia_blocks;
-    }
-unlock:
-    UNLOCK(&frame->lock);
-
-    if (done) {
-        inode_ctx_put(entry->inode, this, (uint64_t)(long)local->fctx);
-
-        done = 0;
-        LOCK(&main_frame->lock);
-        {
-            main_local->wind_count--;
-            if (!main_local->wind_count)
-                done = 1;
-            if (local->op_ret == -1) {
-                main_local->op_errno = local->op_errno;
-                main_local->op_ret = local->op_ret;
-            }
-            entry->d_stat.ia_blocks = local->stbuf_blocks;
-        }
-        UNLOCK(&main_frame->lock);
-        if (done) {
-            main_frame->local = NULL;
-            STRIPE_STACK_UNWIND(readdir, main_frame, main_local->op_ret,
-                                main_local->op_errno, &main_local->entries,
-                                NULL);
-            gf_dirent_free(&main_local->entries);
-            stripe_local_wipe(main_local);
-            mem_put(main_local);
-        }
-        frame->local = NULL;
-        stripe_local_wipe(local);
-        mem_put(local);
-        STRIPE_STACK_DESTROY(frame);
-    }
-
-    return 0;
-}
-
-int32_t
-stripe_readdirp_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int32_t op_ret, int32_t op_errno, gf_dirent_t *orig_entries,
-                    dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    call_frame_t *prev = NULL;
-    gf_dirent_t *local_entry = NULL;
-    gf_dirent_t *tmp_entry = NULL;
-    xlator_list_t *trav = NULL;
-    loc_t loc = {
-        0,
-    };
-    int32_t count = 0;
-    stripe_private_t *priv = NULL;
-    int32_t subvols = 0;
-    dict_t *xattrs = NULL;
-    call_frame_t *local_frame = NULL;
-    stripe_local_t *local_ent = NULL;
-
-    if (!this || !frame->local || !cookie) {
-        gf_log("stripe", GF_LOG_DEBUG, "possible NULL deref");
-        goto out;
-    }
-    prev = cookie;
-    local = frame->local;
-    trav = this->children;
-    priv = this->private;
-
-    subvols = priv->child_count;
-
-    LOCK(&frame->lock);
-    {
-        local->op_errno = op_errno;
-        local->op_ret = op_ret;
-
-        if (op_ret != -1) {
-            list_splice_init(&orig_entries->list, &local->entries.list);
-            local->wind_count = op_ret;
-        }
-    }
-    UNLOCK(&frame->lock);
-
-    if (op_ret == -1) {
-        gf_log(this->name, GF_LOG_WARNING, "%s returned error %s",
-               prev->this->name, strerror(op_errno));
-        goto out;
-    }
-
-    xattrs = dict_new();
-    if (xattrs)
-        (void)stripe_xattr_request_build(this, xattrs, 0, 0, 0, 0);
-    count = op_ret;
-    list_for_each_entry_safe(local_entry, tmp_entry, (&local->entries.list),
-                             list)
-    {
-        if (!local_entry)
-            break;
-        if (!IA_ISREG(local_entry->d_stat.ia_type) || !local_entry->inode) {
-            LOCK(&frame->lock);
-            {
-                local->wind_count--;
-                count = local->wind_count;
-            }
-            UNLOCK(&frame->lock);
-            continue;
-        }
-
-        local_frame = copy_frame(frame);
-
-        if (!local_frame) {
-            op_errno = ENOMEM;
-            op_ret = -1;
-            goto out;
-        }
-
-        local_ent = mem_get0(this->local_pool);
-        if (!local_ent) {
-            op_errno = ENOMEM;
-            op_ret = -1;
-            goto out;
-        }
-
-        loc.inode = inode_ref(local_entry->inode);
-
-        gf_uuid_copy(loc.gfid, local_entry->d_stat.ia_gfid);
-
-        local_ent->orig_frame = frame;
-
-        local_ent->call_count = subvols;
-
-        local_ent->dirent = local_entry;
-
-        local_frame->local = local_ent;
-
-        trav = this->children;
-        while (trav) {
-            STACK_WIND(local_frame, stripe_readdirp_lookup_cbk, trav->xlator,
-                       trav->xlator->fops->lookup, &loc, xattrs);
-            trav = trav->next;
-        }
-        loc_wipe(&loc);
-    }
-out:
-    if (!count) {
-        /* all entries are directories */
-        frame->local = NULL;
-        STRIPE_STACK_UNWIND(readdir, frame, (local ? local->op_ret : -1),
-                            (local ? local->op_errno : EINVAL),
-                            (local ? &local->entries : NULL), NULL);
-        gf_dirent_free(&local->entries);
-        stripe_local_wipe(local);
-        mem_put(local);
-    }
-    if (xattrs)
-        dict_unref(xattrs);
-    return 0;
-}
-int32_t
-stripe_readdirp(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-                off_t off, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    xlator_list_t *trav = NULL;
-    int op_errno = -1;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(fd, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    if (priv->first_child_down) {
-        op_errno = ENOTCONN;
-        goto err;
-    }
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    frame->local = local;
-
-    local->fd = fd_ref(fd);
-
-    local->wind_count = 0;
-
-    local->count = 0;
-    local->op_ret = -1;
-    INIT_LIST_HEAD(&local->entries);
-
-    if (!trav)
-        goto err;
-
-    STACK_WIND(frame, stripe_readdirp_cbk, trav->xlator,
-               trav->xlator->fops->readdirp, fd, size, off, xdata);
-    return 0;
-err:
-    op_errno = (op_errno == -1) ? errno : op_errno;
-    STRIPE_STACK_UNWIND(readdir, frame, -1, op_errno, NULL, NULL);
-
-    return 0;
-}
-
-int32_t
-mem_acct_init(xlator_t *this)
-{
-    int ret = -1;
-
-    if (!this)
-        goto out;
-
-    ret = xlator_mem_acct_init(this, gf_stripe_mt_end + 1);
-
-    if (ret != 0) {
-        gf_log(this->name, GF_LOG_ERROR,
-               "Memory accounting init"
-               "failed");
-        goto out;
-    }
-
-out:
-    return ret;
-}
-
-static int
-clear_pattern_list(stripe_private_t *priv)
-{
-    struct stripe_options *prev = NULL;
-    struct stripe_options *trav = NULL;
-    int ret = -1;
-
-    GF_VALIDATE_OR_GOTO("stripe", priv, out);
-
-    trav = priv->pattern;
-    priv->pattern = NULL;
-    while (trav) {
-        prev = trav;
-        trav = trav->next;
-        GF_FREE(prev);
-    }
-
-    ret = 0;
-out:
-    return ret;
-}
-
-int
-reconfigure(xlator_t *this, dict_t *options)
-{
-    stripe_private_t *priv = NULL;
-    data_t *data = NULL;
-    int ret = -1;
-    volume_option_t *opt = NULL;
-
-    GF_ASSERT(this);
-    GF_ASSERT(this->private);
-
-    priv = this->private;
-
-    ret = 0;
-    LOCK(&priv->lock);
-    {
-        ret = clear_pattern_list(priv);
-        if (ret)
-            goto unlock;
-
-        data = dict_get(options, "block-size");
-        if (data) {
-            ret = set_stripe_block_size(this, priv, data->data);
-            if (ret)
-                goto unlock;
-        } else {
-            opt = xlator_volume_option_get(this, "block-size");
-            if (!opt) {
-                gf_log(this->name, GF_LOG_WARNING,
-                       "option 'block-size' not found");
-                ret = -1;
-                goto unlock;
-            }
-
-            if (gf_string2bytesize_uint64(opt->default_value,
-                                          &priv->block_size)) {
-                gf_log(this->name, GF_LOG_ERROR,
-                       "Unable to set default block-size ");
-                ret = -1;
-                goto unlock;
-            }
-        }
-
-        GF_OPTION_RECONF("coalesce", priv->coalesce, options, bool, unlock);
-    }
-unlock:
-    UNLOCK(&priv->lock);
-    if (ret)
-        goto out;
-
-    ret = 0;
-out:
-    return ret;
-}
-
-/**
- * init - This function is called when xlator-graph gets initialized.
- *     The option given in volfiles are parsed here.
- * @this -
- */
-int32_t
-init(xlator_t *this)
-{
-    stripe_private_t *priv = NULL;
-    volume_option_t *opt = NULL;
-    xlator_list_t *trav = NULL;
-    data_t *data = NULL;
-    int32_t count = 0;
-    int ret = -1;
-
-    if (!this)
-        goto out;
-
-    trav = this->children;
-    while (trav) {
-        count++;
-        trav = trav->next;
-    }
-
-    if (!count) {
-        gf_log(this->name, GF_LOG_ERROR,
-               "stripe configured without \"subvolumes\" option. "
-               "exiting");
-        goto out;
-    }
-
-    if (!this->parents) {
-        gf_log(this->name, GF_LOG_WARNING, "dangling volume. check volfile ");
-    }
-
-    if (count == 1) {
-        gf_log(this->name, GF_LOG_ERROR,
-               "stripe configured with only one \"subvolumes\" option."
-               " please check the volume. exiting");
-        goto out;
-    }
-
-    priv = GF_CALLOC(1, sizeof(stripe_private_t),
-                     gf_stripe_mt_stripe_private_t);
-
-    if (!priv)
-        goto out;
-    priv->xl_array = GF_CALLOC(count, sizeof(xlator_t *),
-                               gf_stripe_mt_xlator_t);
-    if (!priv->xl_array)
-        goto out;
-
-    priv->last_event = GF_CALLOC(count, sizeof(int), gf_stripe_mt_int32_t);
-    if (!priv->last_event)
-        goto out;
-
-    priv->child_count = count;
-    LOCK_INIT(&priv->lock);
-
-    trav = this->children;
-    count = 0;
-    while (trav) {
-        priv->xl_array[count++] = trav->xlator;
-        trav = trav->next;
-    }
-
-    if (count > 256) {
-        gf_log(this->name, GF_LOG_ERROR,
-               "maximum number of stripe subvolumes supported "
-               "is 256");
-        goto out;
-    }
-
-    ret = 0;
-    LOCK(&priv->lock);
-    {
-        opt = xlator_volume_option_get(this, "block-size");
-        if (!opt) {
-            gf_log(this->name, GF_LOG_WARNING, "option 'block-size' not found");
-            ret = -1;
-            goto unlock;
-        }
-        if (gf_string2bytesize_uint64(opt->default_value, &priv->block_size)) {
-            gf_log(this->name, GF_LOG_ERROR,
-                   "Unable to set default block-size ");
-            ret = -1;
-            goto unlock;
-        }
-        /* option stripe-pattern *avi:1GB,*pdf:16K */
-        data = dict_get(this->options, "block-size");
-        if (data) {
-            ret = set_stripe_block_size(this, priv, data->data);
-            if (ret)
-                goto unlock;
-        }
-    }
-unlock:
-    UNLOCK(&priv->lock);
-    if (ret)
-        goto out;
-
-    GF_OPTION_INIT("use-xattr", priv->xattr_supported, bool, out);
-    /* notify related */
-    priv->nodes_down = priv->child_count;
-
-    GF_OPTION_INIT("coalesce", priv->coalesce, bool, out);
-
-    this->local_pool = mem_pool_new(stripe_local_t, 128);
-    if (!this->local_pool) {
-        ret = -1;
-        gf_log(this->name, GF_LOG_ERROR,
-               "failed to create local_t's memory pool");
-        goto out;
-    }
-
-    this->private = priv;
-
-    ret = 0;
-out:
-    if (ret) {
-        if (priv) {
-            GF_FREE(priv->xl_array);
-            GF_FREE(priv);
-        }
-    }
-    return ret;
-}
-
-/**
- * fini -   Free all the private variables
- * @this -
- */
-void
-fini(xlator_t *this)
-{
-    stripe_private_t *priv = NULL;
-    struct stripe_options *prev = NULL;
-    struct stripe_options *trav = NULL;
-
-    if (!this)
-        goto out;
-
-    priv = this->private;
-    if (priv) {
-        this->private = NULL;
-        GF_FREE(priv->xl_array);
-
-        trav = priv->pattern;
-        while (trav) {
-            prev = trav;
-            trav = trav->next;
-            GF_FREE(prev);
-        }
-        GF_FREE(priv->last_event);
-        LOCK_DESTROY(&priv->lock);
-        GF_FREE(priv);
-    }
-
-out:
-    return;
-}
-
-int32_t
-stripe_getxattr_unwind(call_frame_t *frame, int op_ret, int op_errno,
-                       dict_t *dict, dict_t *xdata)
-
-{
-    STRIPE_STACK_UNWIND(getxattr, frame, op_ret, op_errno, dict, xdata);
-    return 0;
-}
-
-int
-stripe_internal_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                             int op_ret, int op_errno, dict_t *xattr,
-                             dict_t *xdata)
-{
-    char size_key[256] = {
-        0,
-    };
-    char index_key[256] = {
-        0,
-    };
-    char count_key[256] = {
-        0,
-    };
-    char coalesce_key[256] = {
-        0,
-    };
-
-    VALIDATE_OR_GOTO(frame, out);
-    VALIDATE_OR_GOTO(frame->local, out);
-
-    if (!xattr || (op_ret == -1))
-        goto out;
-
-    sprintf(size_key, "trusted.%s.stripe-size", this->name);
-    sprintf(count_key, "trusted.%s.stripe-count", this->name);
-    sprintf(index_key, "trusted.%s.stripe-index", this->name);
-    sprintf(coalesce_key, "trusted.%s.stripe-coalesce", this->name);
-
-    dict_del(xattr, size_key);
-    dict_del(xattr, count_key);
-    dict_del(xattr, index_key);
-    dict_del(xattr, coalesce_key);
-
-out:
-    STRIPE_STACK_UNWIND(getxattr, frame, op_ret, op_errno, xattr, xdata);
-
-    return 0;
-}
-
-int
-stripe_getxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                    int op_ret, int op_errno, dict_t *xattr, dict_t *xdata)
-{
-    int call_cnt = 0;
-    stripe_local_t *local = NULL;
-
-    VALIDATE_OR_GOTO(frame, out);
-    VALIDATE_OR_GOTO(frame->local, out);
-
-    local = frame->local;
-
-    LOCK(&frame->lock);
-    {
-        call_cnt = --local->wind_count;
-    }
-    UNLOCK(&frame->lock);
-
-    if (!xattr || (op_ret < 0))
-        goto out;
-
-    local->op_ret = 0;
-
-    if (!local->xattr) {
-        local->xattr = dict_ref(xattr);
-    } else {
-        stripe_aggregate_xattr(local->xattr, xattr);
-    }
-
-out:
-    if (!call_cnt) {
-        STRIPE_STACK_UNWIND(getxattr, frame, (local ? local->op_ret : -1),
-                            op_errno, (local ? local->xattr : NULL), xdata);
-    }
-
-    return 0;
-}
-
-int32_t
-stripe_vgetxattr_cbk(call_frame_t *frame, void *cookie, xlator_t *this,
-                     int32_t op_ret, int32_t op_errno, dict_t *dict,
-                     dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    int32_t callcnt = 0;
-    int32_t ret = -1;
-    long cky = 0;
-    void *xattr_val = NULL;
-    void *xattr_serz = NULL;
-    stripe_xattr_sort_t *xattr = NULL;
-    dict_t *stripe_xattr = NULL;
-
-    if (!frame || !frame->local || !this) {
-        gf_log("", GF_LOG_ERROR, "Possible NULL deref");
-        return ret;
-    }
-
-    local = frame->local;
-    cky = (long)cookie;
-
-    if (local->xsel[0] == '\0') {
-        gf_log(this->name, GF_LOG_ERROR, "Empty xattr in cbk");
-        return ret;
-    }
-
-    LOCK(&frame->lock);
-    {
-        callcnt = --local->wind_count;
-
-        if (!dict || (op_ret < 0))
-            goto out;
-
-        if (!local->xattr_list)
-            local->xattr_list = (stripe_xattr_sort_t *)GF_CALLOC(
-                local->nallocs, sizeof(stripe_xattr_sort_t),
-                gf_stripe_mt_xattr_sort_t);
-
-        if (local->xattr_list) {
-            xattr = local->xattr_list + (int32_t)cky;
-
-            ret = dict_get_ptr_and_len(dict, local->xsel, &xattr_val,
-                                       &xattr->xattr_len);
-            if (xattr->xattr_len == 0)
-                goto out;
-
-            xattr->pos = cky;
-            xattr->xattr_value = gf_memdup(xattr_val, xattr->xattr_len);
-
-            if (xattr->xattr_value != NULL)
-                local->xattr_total_len += xattr->xattr_len + 1;
-        }
-    }
-out:
-    UNLOCK(&frame->lock);
-
-    if (!callcnt) {
-        if (!local->xattr_total_len)
-            goto unwind;
-
-        stripe_xattr = dict_new();
-        if (!stripe_xattr)
-            goto unwind;
-
-        /* select filler based on ->xsel */
-        if (XATTR_IS_PATHINFO(local->xsel))
-            ret = stripe_fill_pathinfo_xattr(this, local, (char **)&xattr_serz);
-        else if (XATTR_IS_LOCKINFO(local->xsel)) {
-            ret = stripe_fill_lockinfo_xattr(this, local, &xattr_serz);
-        } else {
-            gf_log(this->name, GF_LOG_WARNING,
-                   "Unknown xattr in xattr request");
-            goto unwind;
-        }
-
-        if (!ret) {
-            ret = dict_set_dynptr(stripe_xattr, local->xsel, xattr_serz,
-                                  local->xattr_total_len);
-            if (ret)
-                gf_log(this->name, GF_LOG_ERROR, "Can't set %s key in dict",
-                       local->xsel);
-        }
-
-    unwind:
-        /*
-         * Among other things, STRIPE_STACK_UNWIND will free "local"
-         * for us.  That means we can't dereference it afterward.
-         * Fortunately, the actual result is in stripe_xattr now, so we
-         * can simply clean up before unwinding.
-         */
-        ret = stripe_free_xattr_str(local);
-        GF_FREE(local->xattr_list);
-        local->xattr_list = NULL;
-
-        STRIPE_STACK_UNWIND(getxattr, frame, op_ret, op_errno, stripe_xattr,
-                            NULL);
-
-        if (stripe_xattr)
-            dict_unref(stripe_xattr);
-    }
-
-    return ret;
-}
-
-int
-stripe_marker_populate_args(call_frame_t *frame, int type, int *gauge,
-                            xlator_t **subvols)
-{
-    xlator_t *this = frame->this;
-    stripe_private_t *priv = this->private;
-    stripe_local_t *local = frame->local;
-    int count = 0;
-
-    count = priv->child_count;
-    if (MARKER_XTIME_TYPE == type) {
-        if (!IA_FILE_OR_DIR(local->loc.inode->ia_type))
-            count = 1;
-    }
-    memcpy(subvols, priv->xl_array, sizeof(*subvols) * count);
-
-    return count;
-}
-
-int32_t
-stripe_getxattr(call_frame_t *frame, xlator_t *this, loc_t *loc,
-                const char *name, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    xlator_list_t *trav = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t op_errno = EINVAL;
-    int i = 0;
-    int ret = 0;
-
-    VALIDATE_OR_GOTO(frame, err);
-    VALIDATE_OR_GOTO(this, err);
-    VALIDATE_OR_GOTO(loc, err);
-    VALIDATE_OR_GOTO(loc->path, err);
-    VALIDATE_OR_GOTO(loc->inode, err);
-
-    priv = this->private;
-    trav = this->children;
-
-    /* Initialization */
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-    local->op_ret = -1;
-    frame->local = local;
-    loc_copy(&local->loc, loc);
-
-    if (name && strncmp(name, QUOTA_SIZE_KEY, SLEN(QUOTA_SIZE_KEY)) == 0) {
-        local->wind_count = priv->child_count;
-
-        for (i = 0, trav = this->children; i < priv->child_count;
-             i++, trav = trav->next) {
-            STACK_WIND(frame, stripe_getxattr_cbk, trav->xlator,
-                       trav->xlator->fops->getxattr, loc, name, xdata);
-        }
-
-        return 0;
-    }
-
-    if (name && (XATTR_IS_PATHINFO(name))) {
-        if (IA_ISREG(loc->inode->ia_type)) {
-            ret = inode_ctx_get(loc->inode, this, (uint64_t *)&local->fctx);
-            if (ret)
-                gf_log(this->name, GF_LOG_ERROR,
-                       "stripe size unavailable from fctx"
-                       " relying on pathinfo could lead to"
-                       " wrong results");
-        }
-
-        local->nallocs = local->wind_count = priv->child_count;
-        (void)strncpy(local->xsel, name, strlen(name));
-
-        /**
-         * for xattrs that need info from all children, fill ->xsel
-         * as above and call the filler function in cbk based on
-         * it
-         */
-        for (i = 0, trav = this->children; i < priv->child_count;
-             i++, trav = trav->next) {
-            STACK_WIND_COOKIE(frame, stripe_vgetxattr_cbk, (void *)(long)i,
-                              trav->xlator, trav->xlator->fops->getxattr, loc,
-                              name, xdata);
-        }
-
-        return 0;
-    }
-
-    if (cluster_handle_marker_getxattr(frame, loc, name, priv->vol_uuid,
-                                       stripe_getxattr_unwind,
-                                       stripe_marker_populate_args) == 0)
-        return 0;
-
-    STACK_WIND(frame, stripe_internal_getxattr_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->getxattr, loc, name, xdata);
-
-    return 0;
-
-err:
-    STRIPE_STACK_UNWIND(getxattr, frame, -1, op_errno, NULL, NULL);
-    return 0;
-}
-
-static gf_boolean_t
-stripe_is_special_xattr(const char *name)
-{
-    gf_boolean_t is_spl = _gf_false;
-
-    if (!name) {
-        goto out;
-    }
-
-    if (!strncmp(name, GF_XATTR_LOCKINFO_KEY, SLEN(GF_XATTR_LOCKINFO_KEY)) ||
-        XATTR_IS_PATHINFO(name))
-        is_spl = _gf_true;
-out:
-    return is_spl;
-}
-
-int32_t
-stripe_fgetxattr_from_everyone(call_frame_t *frame, xlator_t *this, fd_t *fd,
-                               const char *name, dict_t *xdata)
-{
-    stripe_local_t *local = NULL;
-    stripe_private_t *priv = NULL;
-    int32_t ret = -1, op_errno = 0;
-    int i = 0;
-    xlator_list_t *trav = NULL;
-
-    priv = this->private;
-
-    local = mem_get0(this->local_pool);
-    if (!local) {
-        op_errno = ENOMEM;
-        goto err;
-    }
-
-    local->op_ret = -1;
-    frame->local = local;
-
-    strncpy(local->xsel, name, strlen(name));
-    local->nallocs = local->wind_count = priv->child_count;
-
-    for (i = 0, trav = this->children; i < priv->child_count;
-         i++, trav = trav->next) {
-        STACK_WIND_COOKIE(frame, stripe_vgetxattr_cbk, (void *)(long)i,
-                          trav->xlator, trav->xlator->fops->fgetxattr, fd, name,
-                          xdata);
-    }
-
-    return 0;
-
-err:
-    STACK_UNWIND_STRICT(fgetxattr, frame, -1, op_errno, NULL, NULL);
-    return ret;
-}
-
-int32_t
-stripe_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd,
-                 const char *name, dict_t *xdata)
-{
-    if (stripe_is_special_xattr(name)) {
-        stripe_fgetxattr_from_everyone(frame, this, fd, name, xdata);
-        goto out;
-    }
-
-    STACK_WIND(frame, stripe_internal_getxattr_cbk, FIRST_CHILD(this),
-               FIRST_CHILD(this)->fops->fgetxattr, fd, name, xdata);
-
-out:
-    return 0;
-}
-
-int32_t
-stripe_priv_dump(xlator_t *this)
-{
-    char key[GF_DUMP_MAX_BUF_LEN];
-    int i = 0;
-    stripe_private_t *priv = NULL;
-    int ret = -1;
-    struct stripe_options *options = NULL;
-
-    GF_VALIDATE_OR_GOTO("stripe", this, out);
-
-    priv = this->private;
-    if (!priv)
-        goto out;
-
-    ret = TRY_LOCK(&priv->lock);
-    if (ret != 0)
-        goto out;
-
-    gf_proc_dump_add_section("xlator.cluster.stripe.%s.priv", this->name);
-    gf_proc_dump_write("child_count", "%d", priv->child_count);
-
-    for (i = 0; i < priv->child_count; i++) {
-        sprintf(key, "subvolumes[%d]", i);
-        gf_proc_dump_write(key, "%s.%s", priv->xl_array[i]->type,
-                           priv->xl_array[i]->name);
-    }
-
-    options = priv->pattern;
-    while (options != NULL) {
-        gf_proc_dump_write("path_pattern", "%s", priv->pattern->path_pattern);
-        gf_proc_dump_write("options_block_size", "%ul", options->block_size);
-
-        options = options->next;
-    }
-
-    gf_proc_dump_write("block_size", "%ul", priv->block_size);
-    gf_proc_dump_write("nodes-down", "%d", priv->nodes_down);
-    gf_proc_dump_write("first-child_down", "%d", priv->first_child_down);
-    gf_proc_dump_write("xattr_supported", "%d", priv->xattr_supported);
-
-    UNLOCK(&priv->lock);
-
-out:
-    return ret;
-}
-
-struct xlator_fops fops = {
-    .stat = stripe_stat,
-    .unlink = stripe_unlink,
-    .rename = stripe_rename,
-    .link = stripe_link,
-    .truncate = stripe_truncate,
-    .create = stripe_create,
-    .open = stripe_open,
-    .readv = stripe_readv,
-    .writev = stripe_writev,
-    .statfs = stripe_statfs,
-    .flush = stripe_flush,
-    .fsync = stripe_fsync,
-    .ftruncate = stripe_ftruncate,
-    .fstat = stripe_fstat,
-    .mkdir = stripe_mkdir,
-    .rmdir = stripe_rmdir,
-    .lk = stripe_lk,
-    .opendir = stripe_opendir,
-    .fsyncdir = stripe_fsyncdir,
-    .setattr = stripe_setattr,
-    .fsetattr = stripe_fsetattr,
-    .lookup = stripe_lookup,
-    .mknod = stripe_mknod,
-    .setxattr = stripe_setxattr,
-    .fsetxattr = stripe_fsetxattr,
-    .getxattr = stripe_getxattr,
-    .fgetxattr = stripe_fgetxattr,
-    .removexattr = stripe_removexattr,
-    .fremovexattr = stripe_fremovexattr,
-    .readdirp = stripe_readdirp,
-    .fallocate = stripe_fallocate,
-    .discard = stripe_discard,
-    .zerofill = stripe_zerofill,
-    .seek = stripe_seek,
-};
-
-struct xlator_cbks cbks = {
-    .release = stripe_release,
-    .forget = stripe_forget,
-};
-
-struct xlator_dumpops dumpops = {
-    .priv = stripe_priv_dump,
-};
-
-struct volume_options options[] = {
-    {
-        .key = {"block-size"},
-        .type = GF_OPTION_TYPE_SIZE_LIST,
-        .default_value = "128KB",
-        .min = STRIPE_MIN_BLOCK_SIZE,
-        .description = "Size of the stripe unit that would be read "
-                       "from or written to the striped servers.",
-        .op_version = {1},
-        .tags = {"stripe"},
-        .flags = OPT_FLAG_CLIENT_OPT | OPT_FLAG_SETTABLE,
-    },
-    {
-        .key = {"use-xattr"},
-        .type = GF_OPTION_TYPE_BOOL,
-        .default_value = "true",
-        .description = "handle the stripe without the xattr",
-        .tags = {"stripe", "dev-only"},
-        .flags = OPT_FLAG_CLIENT_OPT,
-    },
-    {
-        .key = {"coalesce"},
-        .type = GF_OPTION_TYPE_BOOL,
-        .default_value = "true",
-        .description = "Enable/Disable coalesce mode to flatten striped "
-                       "files as stored on the server (i.e., eliminate holes "
-                       "caused by the traditional format).",
-        .op_version = {1},
-        .flags = OPT_FLAG_CLIENT_OPT | OPT_FLAG_SETTABLE,
-        .tags = {"stripe"},
-    },
-    {.key = {NULL}},
-};
diff --git a/xlators/cluster/stripe/src/stripe.h b/xlators/cluster/stripe/src/stripe.h
deleted file mode 100644
index 88c24b682b8..00000000000
--- a/xlators/cluster/stripe/src/stripe.h
+++ /dev/null
@@ -1,291 +0,0 @@
-/*
-  Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
-  This file is part of GlusterFS.
-
-  This file is licensed to you under your choice of the GNU Lesser
-  General Public License, version 3 or any later version (LGPLv3 or
-  later), or the GNU General Public License, version 2 (GPLv2), in all
-  cases as published by the Free Software Foundation.
-*/
-
-#ifndef _STRIPE_H_
-#define _STRIPE_H_
-
-#include <glusterfs/xlator.h>
-#include <glusterfs/logging.h>
-#include <glusterfs/defaults.h>
-#include <glusterfs/common-utils.h>
-#include <glusterfs/compat.h>
-#include <glusterfs/compat-errno.h>
-#include "stripe-mem-types.h"
-#include "libxlator.h"
-#include <fnmatch.h>
-#include <signal.h>
-
-#define STRIPE_PATHINFO_HEADER "STRIPE:"
-#define STRIPE_MIN_BLOCK_SIZE (16 * GF_UNIT_KB)
-
-#define STRIPE_STACK_UNWIND(fop, frame, params...)                             \
-    do {                                                                       \
-        stripe_local_t *__local = NULL;                                        \
-        if (frame) {                                                           \
-            __local = frame->local;                                            \
-            frame->local = NULL;                                               \
-        }                                                                      \
-        STACK_UNWIND_STRICT(fop, frame, params);                               \
-        if (__local) {                                                         \
-            stripe_local_wipe(__local);                                        \
-            mem_put(__local);                                                  \
-        }                                                                      \
-    } while (0)
-
-#define STRIPE_STACK_DESTROY(frame)                                            \
-    do {                                                                       \
-        stripe_local_t *__local = NULL;                                        \
-        __local = frame->local;                                                \
-        frame->local = NULL;                                                   \
-        STACK_DESTROY(frame->root);                                            \
-        if (__local) {                                                         \
-            stripe_local_wipe(__local);                                        \
-            mem_put(__local);                                                  \
-        }                                                                      \
-    } while (0)
-
-#define STRIPE_VALIDATE_FCTX(fctx, label)                                      \
-    do {                                                                       \
-        int idx = 0;                                                           \
-        if (!fctx) {                                                           \
-            op_errno = EINVAL;                                                 \
-            goto label;                                                        \
-        }                                                                      \
-        for (idx = 0; idx < fctx->stripe_count; idx++) {                       \
-            if (!fctx->xl_array[idx]) {                                        \
-                gf_log(this->name, GF_LOG_ERROR, "fctx->xl_array[%d] is NULL", \
-                       idx);                                                   \
-                op_errno = ESTALE;                                             \
-                goto label;                                                    \
-            }                                                                  \
-        }                                                                      \
-    } while (0)
-
-typedef struct stripe_xattr_sort {
-    int pos;
-    int xattr_len;
-    char *xattr_value;
-} stripe_xattr_sort_t;
-
-/**
- * struct stripe_options : This keeps the pattern and the block-size
- *     information, which is used for striping on a file.
- */
-struct stripe_options {
-    struct stripe_options *next;
-    char path_pattern[256];
-    uint64_t block_size;
-};
-
-/**
- * Private structure for stripe translator
- */
-struct stripe_private {
-    struct stripe_options *pattern;
-    xlator_t **xl_array;
-    uint64_t block_size;
-    gf_lock_t lock;
-    uint8_t nodes_down;
-    int8_t first_child_down;
-    int *last_event;
-    int8_t child_count;
-    gf_boolean_t xattr_supported; /* default yes */
-    gf_boolean_t coalesce;
-    char vol_uuid[UUID_SIZE + 1];
-};
-
-/**
- * Used to keep info about the replies received from readv/writev calls
- */
-struct stripe_replies {
-    struct iovec *vector;
-    int32_t count;   // count of vector
-    int32_t op_ret;  // op_ret of readv
-    int32_t op_errno;
-    int32_t requested_size;
-    struct iatt stbuf; /* 'stbuf' is also a part of reply */
-};
-
-typedef struct _stripe_fd_ctx {
-    off_t stripe_size;
-    int stripe_count;
-    int stripe_coalesce;
-    int static_array;
-    xlator_t **xl_array;
-} stripe_fd_ctx_t;
-
-/**
- * Local structure to be passed with all the frames in case of STACK_WIND
- */
-struct stripe_local; /* this itself is used inside the structure; */
-
-struct stripe_local {
-    struct stripe_local *next;
-    call_frame_t *orig_frame;
-
-    stripe_fd_ctx_t *fctx;
-
-    /* Used by _cbk functions */
-    struct iatt stbuf;
-    struct iatt pre_buf;
-    struct iatt post_buf;
-    struct iatt preparent;
-    struct iatt postparent;
-
-    off_t stbuf_size;
-    off_t prebuf_size;
-    off_t postbuf_size;
-    off_t preparent_size;
-    off_t postparent_size;
-
-    blkcnt_t stbuf_blocks;
-    blkcnt_t prebuf_blocks;
-    blkcnt_t postbuf_blocks;
-    blkcnt_t preparent_blocks;
-    blkcnt_t postparent_blocks;
-
-    struct stripe_replies *replies;
-    struct statvfs statvfs_buf;
-    dir_entry_t *entry;
-
-    int8_t revalidate;
-    int8_t failed;
-    int8_t unwind;
-
-    size_t readv_size;
-    int32_t entry_count;
-    int32_t node_index;
-    int32_t call_count;
-    int32_t wind_count; /* used instead of child_cound
-                           in case of read and write */
-    int32_t op_ret;
-    int32_t op_errno;
-    int32_t count;
-    int32_t flags;
-    char *name;
-    inode_t *inode;
-
-    loc_t loc;
-    loc_t loc2;
-
-    mode_t mode;
-    dev_t rdev;
-    /* For File I/O fops */
-    dict_t *xdata;
-
-    stripe_xattr_sort_t *xattr_list;
-    int32_t xattr_total_len;
-    int32_t nallocs;
-    char xsel[256];
-
-    /* General usage */
-    off_t offset;
-    off_t stripe_size;
-
-    int xattr_self_heal_needed;
-    int entry_self_heal_needed;
-
-    int8_t *list;
-    struct gf_flock lock;
-    fd_t *fd;
-    void *value;
-    struct iobref *iobref;
-    gf_dirent_t entries;
-    gf_dirent_t *dirent;
-    dict_t *xattr;
-    uuid_t ia_gfid;
-
-    int xflag;
-    mode_t umask;
-};
-
-typedef struct stripe_local stripe_local_t;
-typedef struct stripe_private stripe_private_t;
-
-/*
- * Determine the stripe index of a particular frame based on the translator.
- */
-static inline int32_t
-stripe_get_frame_index(stripe_fd_ctx_t *fctx, call_frame_t *prev)
-{
-    int32_t i, idx = -1;
-
-    for (i = 0; i < fctx->stripe_count; i++) {
-        if (fctx->xl_array[i] == prev->this) {
-            idx = i;
-            break;
-        }
-    }
-
-    return idx;
-}
-
-static inline void
-stripe_copy_xl_array(xlator_t **dst, xlator_t **src, int count)
-{
-    int i;
-
-    for (i = 0; i < count; i++)
-        dst[i] = src[i];
-}
-
-void
-stripe_local_wipe(stripe_local_t *local);
-int32_t
-stripe_ctx_handle(xlator_t *this, call_frame_t *prev, stripe_local_t *local,
-                  dict_t *dict);
-void
-stripe_aggregate_xattr(dict_t *dst, dict_t *src);
-int32_t
-stripe_xattr_request_build(xlator_t *this, dict_t *dict, uint64_t stripe_size,
-                           uint32_t stripe_count, uint32_t stripe_index,
-                           uint32_t stripe_coalesce);
-int32_t
-stripe_get_matching_bs(const char *path, stripe_private_t *priv);
-int
-set_stripe_block_size(xlator_t *this, stripe_private_t *priv, char *data);
-int32_t
-stripe_iatt_merge(struct iatt *from, struct iatt *to);
-int32_t
-stripe_fill_pathinfo_xattr(xlator_t *this, stripe_local_t *local,
-                           char **xattr_serz);
-int32_t
-stripe_free_xattr_str(stripe_local_t *local);
-int32_t
-stripe_xattr_aggregate(char *buffer, stripe_local_t *local, int32_t *total);
-off_t
-coalesced_offset(off_t offset, uint64_t stripe_size, int stripe_count);
-off_t
-uncoalesced_size(off_t size, uint64_t stripe_size, int stripe_count,
-                 int stripe_index);
-int32_t
-stripe_fill_lockinfo_xattr(xlator_t *this, stripe_local_t *local,
-                           void **xattr_serz);
-
-/*
- * Adjust the size attribute for files if coalesce is enabled.
- */
-static inline void
-correct_file_size(struct iatt *buf, stripe_fd_ctx_t *fctx, call_frame_t *prev)
-{
-    int index;
-
-    if (!IA_ISREG(buf->ia_type))
-        return;
-
-    if (!fctx || !fctx->stripe_coalesce)
-        return;
-
-    index = stripe_get_frame_index(fctx, prev);
-    buf->ia_size = uncoalesced_size(buf->ia_size, fctx->stripe_size,
-                                    fctx->stripe_count, index);
-}
-
-#endif /* _STRIPE_H_ */