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-rw-r--r--xlators/cluster/dht/src/dht-common.c3470
1 files changed, 3470 insertions, 0 deletions
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
new file mode 100644
index 00000000000..5e4979e31b0
--- /dev/null
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -0,0 +1,3470 @@
+/*
+ Copyright (c) 2009 Z RESEARCH, Inc. <http://www.zresearch.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+/* TODO: add NS locking */
+
+#include "glusterfs.h"
+#include "xlator.h"
+#include "dht-common.h"
+#include "defaults.h"
+
+
+/* TODO:
+ - use volumename in xattr instead of "dht"
+ - use NS locks
+ - handle all cases in self heal layout reconstruction
+ - complete linkfile selfheal
+*/
+
+int
+dht_lookup_selfheal_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this,
+ int op_ret, int op_errno)
+{
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+ int ret = 0;
+
+ local = frame->local;
+ ret = op_ret;
+
+ if (ret == 0) {
+ layout = local->selfheal.layout;
+ ret = inode_ctx_put (local->inode, this, (uint64_t)(long)layout);
+
+ if (ret == 0)
+ local->selfheal.layout = NULL;
+
+ if (local->st_ino) {
+ local->stbuf.st_ino = local->st_ino;
+ } else {
+ gf_log (this->name, GF_LOG_WARNING,
+ "could not find hashed subvolume for %s",
+ local->loc.path);
+ }
+ }
+
+ DHT_STACK_UNWIND (frame, ret, local->op_errno, local->inode,
+ &local->stbuf, local->xattr);
+
+ return 0;
+}
+
+
+int
+dht_lookup_dir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf, dict_t *xattr)
+{
+ dht_conf_t *conf = NULL;
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ int ret = 0;
+ int is_dir = 0;
+
+ conf = this->private;
+ local = frame->local;
+ prev = cookie;
+
+ layout = local->layout;
+
+ LOCK (&frame->lock);
+ {
+ /* TODO: assert equal mode on stbuf->st_mode and
+ local->stbuf->st_mode
+
+ else mkdir/chmod/chown and fix
+ */
+ /* TODO: assert equal hash type in xattr, local->xattr */
+
+ /* TODO: always ensure same subvolume is in layout->list[0] */
+
+ ret = dht_layout_merge (this, layout, prev->this,
+ op_ret, op_errno, xattr);
+
+ if (op_ret == -1) {
+ local->op_errno = ENOENT;
+ gf_log (this->name, GF_LOG_WARNING,
+ "lookup of %s on %s returned error (%s)",
+ local->loc.path, prev->this->name,
+ strerror (op_errno));
+
+ goto unlock;
+ }
+
+ is_dir = check_is_dir (inode, stbuf, xattr);
+ if (!is_dir)
+ goto unlock;
+
+ local->op_ret = 0;
+ if (local->xattr == NULL)
+ local->xattr = dict_ref (xattr);
+ if (local->inode == NULL)
+ local->inode = inode_ref (inode);
+
+ dht_stat_merge (this, &local->stbuf, stbuf, prev->this);
+
+ if (prev->this == local->hashed_subvol)
+ local->st_ino = local->stbuf.st_ino;
+
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+
+ this_call_cnt = dht_frame_return (frame);
+
+ if (is_last_call (this_call_cnt)) {
+ if (local->op_ret == 0) {
+ ret = dht_layout_normalize (this, &local->loc, layout);
+
+ local->layout = NULL;
+
+ if (ret != 0) {
+ layout->gen = conf->gen;
+
+ gf_log (this->name, GF_LOG_WARNING,
+ "fixing assignment on %s",
+ local->loc.path);
+ goto selfheal;
+ }
+
+ inode_ctx_put (local->inode, this, (uint64_t)(long)layout);
+
+ if (local->st_ino) {
+ local->stbuf.st_ino = local->st_ino;
+ } else {
+ gf_log (this->name, GF_LOG_WARNING,
+ "could not find hashed subvolume for %s",
+ local->loc.path);
+ }
+ }
+
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ local->inode, &local->stbuf, local->xattr);
+ }
+
+ return 0;
+
+selfheal:
+ ret = dht_selfheal_directory (frame, dht_lookup_selfheal_cbk,
+ &local->loc, layout);
+
+ return 0;
+}
+
+int
+dht_revalidate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf, dict_t *xattr)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ int ret = -1;
+ int is_dir = 0;
+ int is_linkfile = 0;
+
+ local = frame->local;
+ prev = cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+
+ if (op_errno != ENOTCONN && op_errno != ENOENT) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "subvolume %s returned -1 (%s)",
+ prev->this->name, strerror (op_errno));
+ }
+
+ goto unlock;
+ }
+
+ if (S_IFMT & (stbuf->st_mode ^ local->inode->st_mode)) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "mismatching filetypes 0%o v/s 0%o for %s",
+ (stbuf->st_mode & S_IFMT),
+ (local->inode->st_mode & S_IFMT),
+ local->loc.path);
+
+ local->op_ret = -1;
+ local->op_errno = EINVAL;
+
+ goto unlock;
+ }
+
+ layout = dht_layout_get (this, inode);
+
+ is_dir = check_is_dir (inode, stbuf, xattr);
+ is_linkfile = check_is_linkfile (inode, stbuf, xattr);
+
+ if (is_linkfile) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "linkfile found in revalidate for %s",
+ local->loc.path);
+ local->layout_mismatch = 1;
+
+ goto unlock;
+ }
+
+ if (is_dir) {
+ ret = dht_layout_dir_mismatch (this, layout,
+ prev->this, &local->loc,
+ xattr);
+ if (ret != 0) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "mismatching layouts for %s",
+ local->loc.path);
+
+ local->layout_mismatch = 1;
+
+ goto unlock;
+ }
+ }
+
+ dht_stat_merge (this, &local->stbuf, stbuf, prev->this);
+
+ local->op_ret = 0;
+ local->stbuf.st_ino = local->st_ino;
+
+ if (!local->xattr)
+ local->xattr = dict_ref (xattr);
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+
+ if (is_last_call (this_call_cnt)) {
+ if (!S_ISDIR (local->stbuf.st_mode)
+ && (local->hashed_subvol != local->cached_subvol)
+ && (local->stbuf.st_nlink == 1))
+ local->stbuf.st_mode |= S_ISVTX;
+
+ if (local->layout_mismatch) {
+ local->op_ret = -1;
+ local->op_errno = ESTALE;
+ }
+
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ local->inode, &local->stbuf, local->xattr);
+ }
+
+ return 0;
+}
+
+
+int
+dht_lookup_linkfile_create_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ inode_t *inode, struct stat *stbuf)
+{
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+ xlator_t *cached_subvol = NULL;
+
+ local = frame->local;
+ cached_subvol = local->cached_subvol;
+
+ layout = dht_layout_for_subvol (this, local->cached_subvol);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ cached_subvol ? cached_subvol->name : "<nil>");
+ local->op_ret = -1;
+ local->op_errno = EINVAL;
+ goto unwind;
+ }
+
+ inode_ctx_put (local->inode, this, (uint64_t)(long)layout);
+ local->op_ret = 0;
+ if (local->stbuf.st_nlink == 1)
+ local->stbuf.st_mode |= S_ISVTX;
+
+unwind:
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ local->inode, &local->stbuf, local->xattr);
+ return 0;
+}
+
+
+int
+dht_lookup_everywhere_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ inode_t *inode, struct stat *buf, dict_t *xattr)
+{
+ dht_conf_t *conf = NULL;
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+ int is_linkfile = 0;
+ int is_dir = 0;
+ xlator_t *subvol = NULL;
+ loc_t *loc = NULL;
+ xlator_t *link_subvol = NULL;
+ xlator_t *hashed_subvol = NULL;
+ xlator_t *cached_subvol = NULL;
+
+ conf = this->private;
+
+ local = frame->local;
+ loc = &local->loc;
+
+ prev = cookie;
+ subvol = prev->this;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ if (op_errno != ENOENT)
+ local->op_errno = op_errno;
+ goto unlock;
+ }
+
+ is_linkfile = check_is_linkfile (inode, buf, xattr);
+ is_dir = check_is_dir (inode, buf, xattr);
+
+ if (is_linkfile) {
+ link_subvol = dht_linkfile_subvol (this, inode, buf,
+ xattr);
+ gf_log (this->name, GF_LOG_DEBUG,
+ "found on %s linkfile %s (-> %s)",
+ subvol->name, loc->path,
+ link_subvol ? link_subvol->name : "''");
+ goto unlock;
+ } else {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "found on %s file %s",
+ subvol->name, loc->path);
+ }
+
+ if (!local->cached_subvol) {
+ /* found one file */
+ dht_stat_merge (this, &local->stbuf, buf, subvol);
+ local->xattr = dict_ref (xattr);
+ local->cached_subvol = subvol;
+ } else {
+ gf_log (this->name, GF_LOG_WARNING,
+ "multiple subvolumes (%s and %s atleast) have "
+ "file %s", local->cached_subvol->name,
+ subvol->name, local->loc.path);
+ }
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ if (is_linkfile) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "deleting stale linkfile %s on %s",
+ loc->path, subvol->name);
+ dht_linkfile_unlink (frame, this, subvol, loc);
+ }
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt)) {
+ hashed_subvol = local->hashed_subvol;
+ cached_subvol = local->cached_subvol;
+
+ if (!cached_subvol) {
+ DHT_STACK_UNWIND (frame, -1, ENOENT, NULL, NULL, NULL);
+ return 0;
+ }
+
+ gf_log (this->name, GF_LOG_WARNING,
+ "linking file %s existing on %s to %s (hash)",
+ loc->path, cached_subvol->name, hashed_subvol->name);
+
+ dht_linkfile_create (frame, dht_lookup_linkfile_create_cbk,
+ cached_subvol, hashed_subvol, loc);
+ }
+
+ return 0;
+}
+
+
+int
+dht_lookup_everywhere (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+ dht_conf_t *conf = NULL;
+ dht_local_t *local = NULL;
+ int i = 0;
+ int call_cnt = 0;
+
+ conf = this->private;
+ local = frame->local;
+
+ call_cnt = conf->subvolume_cnt;
+ local->call_cnt = call_cnt;
+
+ if (!local->inode)
+ local->inode = inode_ref (loc->inode);
+
+ for (i = 0; i < call_cnt; i++) {
+ STACK_WIND (frame, dht_lookup_everywhere_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->lookup,
+ loc, local->xattr_req);
+ }
+
+ return 0;
+}
+
+
+int
+dht_lookup_linkfile_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf, dict_t *xattr)
+{
+ call_frame_t *prev = NULL;
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+ xlator_t *subvol = NULL;
+ loc_t *loc = NULL;
+
+ prev = cookie;
+ subvol = prev->this;
+
+ local = frame->local;
+ loc = &local->loc;
+
+ if (op_ret == -1) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "lookup of %s on %s (following linkfile) failed (%s)",
+ local->loc.path, subvol->name, strerror (op_errno));
+
+ dht_lookup_everywhere (frame, this, loc);
+ return 0;
+ }
+
+ /* TODO: assert type is non-dir and non-linkfile */
+
+ if (stbuf->st_nlink == 1)
+ stbuf->st_mode |= S_ISVTX;
+ dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino);
+
+ layout = dht_layout_for_subvol (this, prev->this);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ prev->this->name);
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ inode_ctx_put (inode, this, (uint64_t)(long)layout);
+
+out:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf, xattr);
+
+ return 0;
+}
+
+
+int
+dht_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf, dict_t *xattr)
+{
+ dht_layout_t *layout = NULL;
+ char is_linkfile = 0;
+ char is_dir = 0;
+ xlator_t *subvol = NULL;
+ dht_conf_t *conf = NULL;
+ dht_local_t *local = NULL;
+ loc_t *loc = NULL;
+ int i = 0;
+ call_frame_t *prev = NULL;
+ int call_cnt = 0;
+
+
+ conf = this->private;
+
+ prev = cookie;
+ local = frame->local;
+ loc = &local->loc;
+
+ if (ENTRY_MISSING (op_ret, op_errno)) {
+ if (conf->search_unhashed) {
+ local->op_errno = ENOENT;
+ dht_lookup_everywhere (frame, this, loc);
+ return 0;
+ }
+ }
+
+ if (op_ret == 0) {
+ is_dir = check_is_dir (inode, stbuf, xattr);
+ if (is_dir) {
+ local->inode = inode_ref (inode);
+ local->xattr = dict_ref (xattr);
+ }
+ }
+
+ if (is_dir || (op_ret == -1 && op_errno == ENOTCONN)) {
+ call_cnt = conf->subvolume_cnt;
+ local->call_cnt = call_cnt;
+
+ local->layout = dht_layout_new (this, conf->subvolume_cnt);
+ if (!local->layout) {
+ op_ret = -1;
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto out;
+ }
+
+ for (i = 0; i < call_cnt; i++) {
+ STACK_WIND (frame, dht_lookup_dir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->lookup,
+ &local->loc, local->xattr_req);
+ }
+ return 0;
+ }
+
+ if (op_ret == -1)
+ goto out;
+
+ is_linkfile = check_is_linkfile (inode, stbuf, xattr);
+ is_dir = check_is_dir (inode, stbuf, xattr);
+
+ if (!is_dir && !is_linkfile) {
+ /* non-directory and not a linkfile */
+
+ dht_itransform (this, prev->this, stbuf->st_ino,
+ &stbuf->st_ino);
+
+ layout = dht_layout_for_subvol (this, prev->this);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ prev->this->name);
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ inode_ctx_put (inode, this, (uint64_t)(long)layout);
+ goto out;
+ }
+
+ if (is_linkfile) {
+ subvol = dht_linkfile_subvol (this, inode, stbuf, xattr);
+
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "linkfile not having link subvolume. path=%s",
+ loc->path);
+ dht_lookup_everywhere (frame, this, loc);
+ return 0;
+ }
+
+ STACK_WIND (frame, dht_lookup_linkfile_cbk,
+ subvol, subvol->fops->lookup,
+ &local->loc, local->xattr_req);
+ }
+
+ return 0;
+
+out:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf, xattr);
+ return 0;
+}
+
+
+int
+dht_lookup (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, dict_t *xattr_req)
+{
+ xlator_t *subvol = NULL;
+ xlator_t *hashed_subvol = NULL;
+ xlator_t *cached_subvol = NULL;
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int ret = -1;
+ int op_errno = -1;
+ dht_layout_t *layout = NULL;
+ int i = 0;
+ int call_cnt = 0;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ ret = loc_dup (loc, &local->loc);
+ if (ret == -1) {
+ op_errno = errno;
+ gf_log (this->name, GF_LOG_ERROR,
+ "copying location failed for path=%s",
+ loc->path);
+ goto err;
+ }
+
+ if (xattr_req) {
+ local->xattr_req = dict_ref (xattr_req);
+ } else {
+ local->xattr_req = dict_new ();
+ }
+
+ hashed_subvol = dht_subvol_get_hashed (this, loc);
+ cached_subvol = dht_subvol_get_cached (this, loc->inode);
+
+ local->cached_subvol = cached_subvol;
+ local->hashed_subvol = hashed_subvol;
+
+ if (is_revalidate (loc)) {
+ layout = dht_layout_get (this, loc->inode);
+
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "revalidate without cache. path=%s",
+ loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (layout->gen && (layout->gen < conf->gen)) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "incomplete layout failure for path=%s",
+ loc->path);
+ op_errno = EAGAIN;
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->st_ino = loc->inode->ino;
+
+ local->call_cnt = layout->cnt;
+ call_cnt = local->call_cnt;
+
+ /* NOTE: we don't require 'trusted.glusterfs.dht.linkto' attribute,
+ * revalidates directly go to the cached-subvolume.
+ */
+ ret = dict_set_uint32 (local->xattr_req,
+ "trusted.glusterfs.dht", 4 * 4);
+
+ for (i = 0; i < layout->cnt; i++) {
+ subvol = layout->list[i].xlator;
+
+ STACK_WIND (frame, dht_revalidate_cbk,
+ subvol, subvol->fops->lookup,
+ loc, local->xattr_req);
+
+ if (!--call_cnt)
+ break;
+ }
+ } else {
+ /* TODO: remove the hard-coding */
+ ret = dict_set_uint32 (local->xattr_req,
+ "trusted.glusterfs.dht", 4 * 4);
+
+ ret = dict_set_uint32 (local->xattr_req,
+ "trusted.glusterfs.dht.linkto", 256);
+
+ if (!hashed_subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s, "
+ "checking on all the subvols to see if "
+ "it is a directory", loc->path);
+ call_cnt = conf->subvolume_cnt;
+ local->call_cnt = call_cnt;
+
+ local->layout = dht_layout_new (this, conf->subvolume_cnt);
+ if (!local->layout) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ for (i = 0; i < call_cnt; i++) {
+ STACK_WIND (frame, dht_lookup_dir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->lookup,
+ &local->loc, local->xattr_req);
+ }
+ return 0;
+ }
+
+ STACK_WIND (frame, dht_lookup_cbk,
+ hashed_subvol, hashed_subvol->fops->lookup,
+ loc, local->xattr_req);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL, NULL);
+ return 0;
+}
+
+
+int
+dht_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, struct stat *stbuf)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+
+
+ local = frame->local;
+ prev = cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ gf_log (this->name, GF_LOG_ERROR,
+ "subvolume %s returned -1 (%s)",
+ prev->this->name, strerror (op_errno));
+ goto unlock;
+ }
+
+ dht_stat_merge (this, &local->stbuf, stbuf, prev->this);
+
+ if (local->inode)
+ local->stbuf.st_ino = local->inode->ino;
+ local->op_ret = 0;
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt))
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ &local->stbuf);
+
+ return 0;
+}
+
+
+int
+dht_stat (call_frame_t *frame, xlator_t *this,
+ loc_t *loc)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+ int i = 0;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ layout = dht_layout_get (this, loc->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ subvol = layout->list[i].xlator;
+
+ STACK_WIND (frame, dht_attr_cbk,
+ subvol, subvol->fops->stat,
+ loc);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_fstat (call_frame_t *frame, xlator_t *this,
+ fd_t *fd)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+ int i = 0;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ layout = dht_layout_get (this, fd->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "local allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (fd->inode);
+ local->call_cnt = layout->cnt;;
+
+ for (i = 0; i < layout->cnt; i++) {
+ subvol = layout->list[i].xlator;
+ STACK_WIND (frame, dht_attr_cbk,
+ subvol, subvol->fops->fstat,
+ fd);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_chmod (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, mode_t mode)
+{
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ layout = dht_layout_get (this, loc->inode);
+
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (!layout_is_sane (layout)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "layout is not sane for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ STACK_WIND (frame, dht_attr_cbk,
+ layout->list[i].xlator,
+ layout->list[i].xlator->fops->chmod,
+ loc, mode);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_chown (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, uid_t uid, gid_t gid)
+{
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ layout = dht_layout_get (this, loc->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (!layout_is_sane (layout)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "layout is not sane for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ STACK_WIND (frame, dht_attr_cbk,
+ layout->list[i].xlator,
+ layout->list[i].xlator->fops->chown,
+ loc, uid, gid);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_fchmod (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, mode_t mode)
+{
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+
+ layout = dht_layout_get (this, fd->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (!layout_is_sane (layout)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "layout is not sane for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (fd->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ STACK_WIND (frame, dht_attr_cbk,
+ layout->list[i].xlator,
+ layout->list[i].xlator->fops->fchmod,
+ fd, mode);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_fchown (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, uid_t uid, gid_t gid)
+{
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ layout = dht_layout_get (this, fd->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (!layout_is_sane (layout)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "layout is not sane for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (fd->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ STACK_WIND (frame, dht_attr_cbk,
+ layout->list[i].xlator,
+ layout->list[i].xlator->fops->fchown,
+ fd, uid, gid);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_utimens (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, struct timespec tv[2])
+{
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ layout = dht_layout_get (this, loc->inode);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no layout for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ if (!layout_is_sane (layout)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "layout is not sane for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = layout->cnt;
+
+ for (i = 0; i < layout->cnt; i++) {
+ STACK_WIND (frame, dht_attr_cbk,
+ layout->list[i].xlator,
+ layout->list[i].xlator->fops->utimens,
+ loc, tv);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_truncate (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, off_t offset)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_attr_cbk,
+ subvol, subvol->fops->truncate,
+ loc, offset);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_ftruncate (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, off_t offset)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (fd->inode);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_attr_cbk,
+ subvol, subvol->fops->ftruncate,
+ fd, offset);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_err_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+
+
+ local = frame->local;
+ prev = cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ gf_log (this->name, GF_LOG_ERROR,
+ "subvolume %s returned -1 (%s)",
+ prev->this->name, strerror (op_errno));
+ goto unlock;
+ }
+
+ local->op_ret = 0;
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt))
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+
+ return 0;
+}
+
+
+int
+dht_access (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t mask)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_err_cbk,
+ subvol, subvol->fops->access,
+ loc, mask);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, const char *path)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, path);
+
+ return 0;
+}
+
+
+int
+dht_readlink (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, size_t size)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_readlink_cbk,
+ subvol, subvol->fops->readlink,
+ loc, size);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, dict_t *xattr)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, xattr);
+
+ return 0;
+}
+
+
+int
+dht_getxattr (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, const char *key)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_getxattr_cbk,
+ subvol, subvol->fops->getxattr,
+ loc, key);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_setxattr (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, dict_t *xattr, int flags)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_err_cbk,
+ subvol, subvol->fops->setxattr,
+ loc, xattr, flags);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_removexattr (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, const char *key)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_err_cbk,
+ subvol, subvol->fops->removexattr,
+ loc, key);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_fd_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, fd_t *fd)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+
+
+ local = frame->local;
+ prev = cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ gf_log (this->name, GF_LOG_ERROR,
+ "subvolume %s returned -1 (%s)",
+ prev->this->name, strerror (op_errno));
+ goto unlock;
+ }
+
+ local->op_ret = 0;
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt))
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ local->fd);
+
+ return 0;
+}
+
+
+int
+dht_open (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int flags, fd_t *fd)
+{
+ xlator_t *subvol = NULL;
+ int ret = -1;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->fd = fd_ref (fd);
+ ret = loc_dup (loc, &local->loc);
+ if (ret == -1) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_fd_cbk,
+ subvol, subvol->fops->open,
+ loc, flags, fd);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ struct iovec *vector, int count, struct stat *stbuf)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf);
+
+ return 0;
+}
+
+
+int
+dht_readv (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, size_t size, off_t off)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_readv_cbk,
+ subvol, subvol->fops->readv,
+ fd, size, off);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL);
+
+ return 0;
+}
+
+
+int
+dht_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, struct stat *stbuf)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+
+ return 0;
+}
+
+
+int
+dht_writev (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, struct iovec *vector, int count, off_t off)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_writev_cbk,
+ subvol, subvol->fops->writev,
+ fd, vector, count, off);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, 0);
+
+ return 0;
+}
+
+
+int
+dht_flush (call_frame_t *frame, xlator_t *this, fd_t *fd)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->fd = fd_ref (fd);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_err_cbk,
+ subvol, subvol->fops->flush, fd);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_fsync (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int datasync)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocatoin failed :(");
+ goto err;
+ }
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_err_cbk,
+ subvol, subvol->fops->fsync,
+ fd, datasync);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, struct flock *flock)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, flock);
+
+ return 0;
+}
+
+
+int
+dht_lk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int cmd, struct flock *flock)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_lk_cbk,
+ subvol, subvol->fops->lk,
+ fd, cmd, flock);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+/* gf_lk no longer exists
+int
+dht_gf_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, struct flock *flock)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, flock);
+
+ return 0;
+}
+
+
+int
+dht_gf_lk (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int cmd, struct flock *flock)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_gf_lk_cbk,
+ subvol, subvol->fops->gf_lk,
+ fd, cmd, flock);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+*/
+
+int
+dht_statfs_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, struct statvfs *statvfs)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ goto unlock;
+ }
+ local->op_ret = 0;
+
+ /* TODO: normalize sizes */
+ local->statvfs.f_bsize = statvfs->f_bsize;
+ local->statvfs.f_frsize = statvfs->f_frsize;
+
+ local->statvfs.f_blocks += statvfs->f_blocks;
+ local->statvfs.f_bfree += statvfs->f_bfree;
+ local->statvfs.f_bavail += statvfs->f_bavail;
+ local->statvfs.f_files += statvfs->f_files;
+ local->statvfs.f_ffree += statvfs->f_ffree;
+ local->statvfs.f_favail += statvfs->f_favail;
+ local->statvfs.f_fsid = statvfs->f_fsid;
+ local->statvfs.f_flag = statvfs->f_flag;
+ local->statvfs.f_namemax = statvfs->f_namemax;
+
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt))
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno,
+ &local->statvfs);
+
+ return 0;
+}
+
+
+int
+dht_statfs (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ local->call_cnt = conf->subvolume_cnt;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ STACK_WIND (frame, dht_statfs_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->statfs, loc);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int ret = -1;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->fd = fd_ref (fd);
+ ret = loc_dup (loc, &local->loc);
+ if (ret == -1) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = conf->subvolume_cnt;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ STACK_WIND (frame, dht_fd_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->opendir,
+ loc, fd);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, gf_dirent_t *orig_entries)
+{
+ dht_local_t *local = NULL;
+ gf_dirent_t entries;
+ gf_dirent_t *orig_entry = NULL;
+ gf_dirent_t *entry = NULL;
+ call_frame_t *prev = NULL;
+ xlator_t *subvol = NULL;
+ xlator_t *next = NULL;
+ dht_layout_t *layout = NULL;
+ int count = 0;
+
+
+ INIT_LIST_HEAD (&entries.list);
+ prev = cookie;
+ local = frame->local;
+
+ if (op_ret < 0)
+ goto done;
+
+ layout = dht_layout_get (this, local->fd->inode);
+
+ list_for_each_entry (orig_entry, &orig_entries->list, list) {
+ subvol = dht_layout_search (this, layout, orig_entry->d_name);
+
+ if (!subvol || subvol == prev->this) {
+ entry = gf_dirent_for_name (orig_entry->d_name);
+ if (!entry) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto unwind;
+ }
+
+ dht_itransform (this, subvol, orig_entry->d_ino,
+ &entry->d_ino);
+ dht_itransform (this, subvol, orig_entry->d_off,
+ &entry->d_off);
+
+ 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;
+
+done:
+ if (count == 0) {
+ next = dht_subvol_next (this, prev->this);
+ if (!next) {
+ goto unwind;
+ }
+
+ STACK_WIND (frame, dht_readdir_cbk,
+ next, next->fops->readdir,
+ local->fd, local->size, 0);
+ return 0;
+ }
+
+unwind:
+ if (op_ret < 0)
+ op_ret = 0;
+
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, &entries);
+
+ gf_dirent_free (&entries);
+
+ return 0;
+}
+
+
+int
+dht_readdir (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, size_t size, off_t yoff)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int op_errno = -1;
+ xlator_t *xvol = NULL;
+ off_t xoff = 0;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ local->fd = fd_ref (fd);
+ local->size = size;
+
+ dht_deitransform (this, yoff, &xvol, (uint64_t *)&xoff);
+
+ /* TODO: do proper readdir */
+ STACK_WIND (frame, dht_readdir_cbk,
+ xvol, xvol->fops->readdir,
+ fd, size, xoff);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+int
+dht_fsyncdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1)
+ local->op_errno = op_errno;
+
+ if (op_ret == 0)
+ local->op_ret = 0;
+ }
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt))
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+
+ return 0;
+}
+
+
+int
+dht_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd, int datasync)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int op_errno = -1;
+ int i = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->fd = fd_ref (fd);
+ local->call_cnt = conf->subvolume_cnt;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ STACK_WIND (frame, dht_fsyncdir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->fsyncdir,
+ fd, datasync);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_newfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf)
+{
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ int ret = -1;
+
+
+ if (op_ret == -1)
+ goto out;
+
+ prev = cookie;
+
+ dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino);
+ layout = dht_layout_for_subvol (this, prev->this);
+
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ prev->this->name);
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ ret = inode_ctx_put (inode, this, (uint64_t)(long)layout);
+ if (ret != 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "could not set inode context");
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+out:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf);
+ return 0;
+}
+
+
+int
+dht_mknod (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, mode_t mode, dev_t rdev)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+
+ subvol = dht_subvol_get_hashed (this, loc);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s",
+ loc->path);
+ op_errno = ENOENT;
+ goto err;
+ }
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "creating %s on %s", loc->path, subvol->name);
+
+ STACK_WIND (frame, dht_newfile_cbk,
+ subvol, subvol->fops->mknod,
+ loc, mode, rdev);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL);
+
+ return 0;
+}
+
+
+int
+dht_symlink (call_frame_t *frame, xlator_t *this,
+ const char *linkname, loc_t *loc)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+
+ subvol = dht_subvol_get_hashed (this, loc);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s",
+ loc->path);
+ op_errno = ENOENT;
+ goto err;
+ }
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "creating %s on %s", loc->path, subvol->name);
+
+ STACK_WIND (frame, dht_newfile_cbk,
+ subvol, subvol->fops->symlink,
+ linkname, loc);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL);
+
+ return 0;
+}
+
+
+int
+dht_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+ xlator_t *cached_subvol = NULL;
+ xlator_t *hashed_subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+
+ cached_subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!cached_subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ hashed_subvol = dht_subvol_get_hashed (this, loc);
+ if (!hashed_subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s",
+ loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->call_cnt = 1;
+ if (hashed_subvol != cached_subvol)
+ local->call_cnt++;
+
+ STACK_WIND (frame, dht_err_cbk,
+ cached_subvol, cached_subvol->fops->unlink, loc);
+
+ if (hashed_subvol != cached_subvol)
+ STACK_WIND (frame, dht_err_cbk,
+ hashed_subvol, hashed_subvol->fops->unlink, loc);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf)
+{
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ dht_local_t *local = NULL;
+
+ prev = cookie;
+ local = frame->local;
+
+ if (op_ret == -1)
+ goto out;
+
+ layout = dht_layout_for_subvol (this, prev->this);
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ prev->this->name);
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ stbuf->st_ino = local->loc.inode->ino;
+
+out:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf);
+
+ return 0;
+}
+
+
+int
+dht_link_linkfile_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf)
+{
+ dht_local_t *local = NULL;
+ xlator_t *srcvol = NULL;
+
+
+ if (op_ret == -1)
+ goto err;
+
+ local = frame->local;
+ srcvol = local->linkfile.srcvol;
+
+ STACK_WIND (frame, dht_link_cbk,
+ srcvol, srcvol->fops->link,
+ &local->loc, &local->loc2);
+
+ return 0;
+
+err:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf);
+
+ return 0;
+}
+
+
+int
+dht_link (call_frame_t *frame, xlator_t *this,
+ loc_t *oldloc, loc_t *newloc)
+{
+ xlator_t *cached_subvol = NULL;
+ xlator_t *hashed_subvol = NULL;
+ int op_errno = -1;
+ int ret = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (oldloc, err);
+ VALIDATE_OR_GOTO (newloc, err);
+
+ cached_subvol = dht_subvol_get_cached (this, oldloc->inode);
+ if (!cached_subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", oldloc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ hashed_subvol = dht_subvol_get_hashed (this, newloc);
+ if (!hashed_subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s",
+ newloc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ ret = loc_copy (&local->loc, oldloc);
+ if (ret == -1) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ ret = loc_copy (&local->loc2, newloc);
+ if (ret == -1) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ if (hashed_subvol != cached_subvol) {
+ dht_linkfile_create (frame, dht_link_linkfile_cbk,
+ cached_subvol, hashed_subvol, newloc);
+ } else {
+ STACK_WIND (frame, dht_link_cbk,
+ cached_subvol, cached_subvol->fops->link,
+ oldloc, newloc);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL);
+
+ return 0;
+}
+
+
+int
+dht_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno,
+ fd_t *fd, inode_t *inode, struct stat *stbuf)
+{
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ int ret = -1;
+
+
+ if (op_ret == -1)
+ goto out;
+
+ prev = cookie;
+
+ dht_itransform (this, prev->this, stbuf->st_ino, &stbuf->st_ino);
+ layout = dht_layout_for_subvol (this, prev->this);
+
+ if (!layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no pre-set layout for subvolume %s",
+ prev->this->name);
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+ ret = inode_ctx_put (inode, this, (uint64_t)(long)layout);
+ if (ret != 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "could not set inode context");
+ op_ret = -1;
+ op_errno = EINVAL;
+ goto out;
+ }
+
+out:
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, fd, inode, stbuf);
+ return 0;
+}
+
+
+int
+dht_create (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t flags, mode_t mode, fd_t *fd)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+
+ subvol = dht_subvol_get_hashed (this, loc);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no subvolume in layout for path=%s",
+ loc->path);
+ op_errno = ENOENT;
+ goto err;
+ }
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "creating %s on %s", loc->path, subvol->name);
+
+ STACK_WIND (frame, dht_create_cbk,
+ subvol, subvol->fops->create,
+ loc, flags, mode, fd);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL, NULL);
+
+ return 0;
+}
+
+
+int
+dht_mkdir_selfheal_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ dht_local_t *local = NULL;
+ dht_layout_t *layout = NULL;
+
+
+ local = frame->local;
+ layout = local->selfheal.layout;
+
+ if (op_ret == 0) {
+ inode_ctx_put (local->inode, this, (uint64_t)(long)layout);
+ local->selfheal.layout = NULL;
+ local->stbuf.st_ino = local->st_ino;
+ }
+
+ DHT_STACK_UNWIND (frame, op_ret, op_errno,
+ local->inode, &local->stbuf);
+
+ return 0;
+}
+
+
+int
+dht_mkdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, inode_t *inode, struct stat *stbuf)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ int ret = -1;
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+
+ local = frame->local;
+ prev = cookie;
+ layout = local->layout;
+
+ LOCK (&frame->lock);
+ {
+ ret = dht_layout_merge (this, layout, prev->this,
+ op_ret, op_errno, NULL);
+
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ goto unlock;
+ }
+ dht_stat_merge (this, &local->stbuf, stbuf, prev->this);
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt)) {
+ local->layout = NULL;
+ dht_selfheal_directory (frame, dht_mkdir_selfheal_cbk,
+ &local->loc, layout);
+ }
+
+ return 0;
+}
+
+int
+dht_mkdir_hashed_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int op_ret, int op_errno,
+ inode_t *inode, struct stat *stbuf)
+{
+ dht_local_t *local = NULL;
+ int ret = -1;
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+ dht_conf_t *conf = NULL;
+ int i = 0;
+ xlator_t *hashed_subvol = NULL;
+
+ local = frame->local;
+ prev = cookie;
+ layout = local->layout;
+ conf = this->private;
+ hashed_subvol = local->hashed_subvol;
+
+ ret = dht_layout_merge (this, layout, prev->this,
+ op_ret, op_errno, NULL);
+
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ goto err;
+ }
+ local->op_ret = 0;
+
+ dht_stat_merge (this, &local->stbuf, stbuf, prev->this);
+
+ local->st_ino = local->stbuf.st_ino;
+
+ local->call_cnt = conf->subvolume_cnt - 1;
+
+ if (local->call_cnt == 0) {
+ local->layout = NULL;
+ dht_selfheal_directory (frame, dht_mkdir_selfheal_cbk,
+ &local->loc, layout);
+ }
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ if (conf->subvolumes[i] == hashed_subvol)
+ continue;
+ STACK_WIND (frame, dht_mkdir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->mkdir,
+ &local->loc, local->mode);
+ }
+ return 0;
+err:
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL);
+ return 0;
+}
+
+int
+dht_mkdir (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, mode_t mode)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int op_errno = -1;
+ int ret = -1;
+ xlator_t *hashed_subvol = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ hashed_subvol = dht_subvol_get_hashed (this, loc);
+
+ if (hashed_subvol == NULL) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "hashed subvol not found");
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local->hashed_subvol = hashed_subvol;
+ local->inode = inode_ref (loc->inode);
+ ret = loc_copy (&local->loc, loc);
+ local->mode = mode;
+
+ if (ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ local->layout = dht_layout_new (this, conf->subvolume_cnt);
+ if (!local->layout) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_mkdir_hashed_cbk,
+ hashed_subvol,
+ hashed_subvol->fops->mkdir,
+ loc, mode);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL, NULL);
+
+ return 0;
+}
+
+
+int
+dht_rmdir_selfheal_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno)
+{
+ dht_local_t *local = NULL;
+
+ local = frame->local;
+ local->layout = NULL;
+
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+
+ return 0;
+}
+
+
+int
+dht_rmdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno)
+{
+ uint64_t tmp_layout = 0;
+ dht_local_t *local = NULL;
+ int this_call_cnt = 0;
+ call_frame_t *prev = NULL;
+ dht_layout_t *layout = NULL;
+
+ local = frame->local;
+ prev = cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ local->op_errno = op_errno;
+ local->op_ret = -1;
+
+ if (op_errno != ENOENT)
+ local->need_selfheal = 1;
+
+ gf_log (this->name, GF_LOG_ERROR,
+ "rmdir on %s for %s failed (%s)",
+ prev->this->name, local->loc.path,
+ strerror (op_errno));
+ goto unlock;
+ }
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+
+ this_call_cnt = dht_frame_return (frame);
+ if (is_last_call (this_call_cnt)) {
+ if (local->need_selfheal) {
+ inode_ctx_get (local->loc.inode, this,
+ &tmp_layout);
+ layout = (dht_layout_t *)(long)tmp_layout;
+
+ /* TODO: neater interface needed below */
+ local->stbuf.st_mode = local->loc.inode->st_mode;
+
+ dht_selfheal_restore (frame, dht_rmdir_selfheal_cbk,
+ &local->loc, layout);
+ } else {
+ DHT_STACK_UNWIND (frame, local->op_ret,
+ local->op_errno);
+ }
+ }
+
+ return 0;
+}
+
+
+int
+dht_rmdir_do (call_frame_t *frame, xlator_t *this)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int i = 0;
+
+ conf = this->private;
+ local = frame->local;
+
+ if (local->op_ret == -1)
+ goto err;
+
+ local->call_cnt = conf->subvolume_cnt;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ STACK_WIND (frame, dht_rmdir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->rmdir,
+ &local->loc);
+ }
+
+ return 0;
+
+err:
+ DHT_STACK_UNWIND (frame, local->op_ret, local->op_errno);
+ return 0;
+}
+
+
+int
+dht_rmdir_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, gf_dirent_t *entries)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = -1;
+ call_frame_t *prev = NULL;
+
+ local = frame->local;
+ prev = cookie;
+
+ if (op_ret > 2) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "readdir on %s for %s returned %d entries",
+ prev->this->name, local->loc.path, op_ret);
+ local->op_ret = -1;
+ local->op_errno = ENOTEMPTY;
+ }
+
+ this_call_cnt = dht_frame_return (frame);
+
+ if (is_last_call (this_call_cnt)) {
+ dht_rmdir_do (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+dht_rmdir_opendir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int op_ret, int op_errno, fd_t *fd)
+{
+ dht_local_t *local = NULL;
+ int this_call_cnt = -1;
+ call_frame_t *prev = NULL;
+
+
+ local = frame->local;
+ prev = cookie;
+
+ if (op_ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "opendir on %s for %s failed (%s)",
+ prev->this->name, local->loc.path,
+ strerror (op_errno));
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_rmdir_readdir_cbk,
+ prev->this, prev->this->fops->readdir,
+ local->fd, 4096, 0);
+
+ return 0;
+
+err:
+ this_call_cnt = dht_frame_return (frame);
+
+ if (is_last_call (this_call_cnt)) {
+ dht_rmdir_do (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+dht_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc)
+{
+ dht_local_t *local = NULL;
+ dht_conf_t *conf = NULL;
+ int op_errno = -1;
+ int i = -1;
+ int ret = -1;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ conf = this->private;
+
+ local = dht_local_init (frame);
+ if (!local) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ local->call_cnt = conf->subvolume_cnt;
+ local->op_ret = 0;
+
+ ret = loc_copy (&local->loc, loc);
+ if (ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ local->fd = fd_create (local->loc.inode, frame->root->pid);
+ if (!local->fd) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ STACK_WIND (frame, dht_rmdir_opendir_cbk,
+ conf->subvolumes[i],
+ conf->subvolumes[i]->fops->opendir,
+ loc, local->fd);
+ }
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+static int32_t
+dht_xattrop_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ dict_t *dict)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, dict);
+ return 0;
+}
+
+int32_t
+dht_xattrop (call_frame_t *frame,
+ xlator_t *this,
+ loc_t *loc,
+ gf_xattrop_flags_t flags,
+ dict_t *dict)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame,
+ dht_xattrop_cbk,
+ subvol, subvol->fops->xattrop,
+ loc, flags, dict);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+static int32_t
+dht_fxattrop_cbk (call_frame_t *frame,
+ void *cookie,
+ xlator_t *this,
+ int32_t op_ret,
+ int32_t op_errno,
+ dict_t *dict)
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno, dict);
+ return 0;
+}
+
+int32_t
+dht_fxattrop (call_frame_t *frame,
+ xlator_t *this,
+ fd_t *fd,
+ gf_xattrop_flags_t flags,
+ dict_t *dict)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame,
+ dht_fxattrop_cbk,
+ subvol, subvol->fops->fxattrop,
+ fd, flags, dict);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno, NULL);
+
+ return 0;
+}
+
+
+static int32_t
+dht_inodelk_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno)
+
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+
+int32_t
+dht_inodelk (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t cmd, struct flock *lock)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame,
+ dht_inodelk_cbk,
+ subvol, subvol->fops->inodelk,
+ loc, cmd, lock);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+static int32_t
+dht_finodelk_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno)
+
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+
+int32_t
+dht_finodelk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int32_t cmd, struct flock *lock)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+
+ STACK_WIND (frame,
+ dht_finodelk_cbk,
+ subvol, subvol->fops->finodelk,
+ fd, cmd, lock);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+static int32_t
+dht_entrylk_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno)
+
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+int32_t
+dht_entrylk (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, const char *basename,
+ entrylk_cmd cmd, entrylk_type type)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+ dht_local_t *local = NULL;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (loc, err);
+ VALIDATE_OR_GOTO (loc->inode, err);
+ VALIDATE_OR_GOTO (loc->path, err);
+
+ subvol = dht_subvol_get_cached (this, loc->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for path=%s", loc->path);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ local = dht_local_init (frame);
+ if (!local) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ goto err;
+ }
+
+ local->inode = inode_ref (loc->inode);
+ local->call_cnt = 1;
+
+ STACK_WIND (frame, dht_entrylk_cbk,
+ subvol, subvol->fops->entrylk,
+ loc, basename, cmd, type);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+static int32_t
+dht_fentrylk_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno)
+
+{
+ DHT_STACK_UNWIND (frame, op_ret, op_errno);
+ return 0;
+}
+
+int32_t
+dht_fentrylk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, const char *basename,
+ entrylk_cmd cmd, entrylk_type type)
+{
+ xlator_t *subvol = NULL;
+ int op_errno = -1;
+
+ VALIDATE_OR_GOTO (frame, err);
+ VALIDATE_OR_GOTO (this, err);
+ VALIDATE_OR_GOTO (fd, err);
+
+ subvol = dht_subvol_get_cached (this, fd->inode);
+ if (!subvol) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "no cached subvolume for fd=%p", fd);
+ op_errno = EINVAL;
+ goto err;
+ }
+
+ STACK_WIND (frame, dht_fentrylk_cbk,
+ subvol, subvol->fops->fentrylk,
+ fd, basename, cmd, type);
+
+ return 0;
+
+err:
+ op_errno = (op_errno == -1) ? errno : op_errno;
+ DHT_STACK_UNWIND (frame, -1, op_errno);
+
+ return 0;
+}
+
+
+int
+dht_forget (xlator_t *this, inode_t *inode)
+{
+ uint64_t tmp_layout = 0;
+ dht_layout_t *layout = NULL;
+
+ inode_ctx_get (inode, this, &tmp_layout);
+
+ if (!layout)
+ return 0;
+ layout = (dht_layout_t *)(long)tmp_layout;
+ if (!layout->preset)
+ FREE (layout);
+
+ return 0;
+}
+
+
+
+static int
+dht_init_subvolumes (xlator_t *this, dht_conf_t *conf)
+{
+ xlator_list_t *subvols = NULL;
+ int cnt = 0;
+
+
+ for (subvols = this->children; subvols; subvols = subvols->next)
+ cnt++;
+
+ conf->subvolumes = CALLOC (cnt, sizeof (xlator_t *));
+ if (!conf->subvolumes) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ return -1;
+ }
+ conf->subvolume_cnt = cnt;
+
+ cnt = 0;
+ for (subvols = this->children; subvols; subvols = subvols->next)
+ conf->subvolumes[cnt++] = subvols->xlator;
+
+ conf->subvolume_status = CALLOC (cnt, sizeof (char));
+ if (!conf->subvolume_status) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "memory allocation failed :(");
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int
+dht_notify (xlator_t *this, int event, void *data, ...)
+{
+ xlator_t *subvol = NULL;
+ int cnt = -1;
+ int i = -1;
+ dht_conf_t *conf = NULL;
+ int ret = -1;
+
+
+ conf = this->private;
+
+ switch (event) {
+ case GF_EVENT_CHILD_UP:
+ subvol = data;
+
+ conf->gen++;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ if (subvol == conf->subvolumes[i]) {
+ cnt = i;
+ break;
+ }
+ }
+
+ if (cnt == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "got GF_EVENT_CHILD_UP bad subvolume %s",
+ subvol->name);
+ break;
+ }
+
+ LOCK (&conf->subvolume_lock);
+ {
+ conf->subvolume_status[cnt] = 1;
+ }
+ UNLOCK (&conf->subvolume_lock);
+
+ break;
+
+ case GF_EVENT_CHILD_DOWN:
+ subvol = data;
+
+ for (i = 0; i < conf->subvolume_cnt; i++) {
+ if (subvol == conf->subvolumes[i]) {
+ cnt = i;
+ break;
+ }
+ }
+
+ if (cnt == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "got GF_EVENT_CHILD_DOWN bad subvolume %s",
+ subvol->name);
+ break;
+ }
+
+ LOCK (&conf->subvolume_lock);
+ {
+ conf->subvolume_status[cnt] = 0;
+ }
+ UNLOCK (&conf->subvolume_lock);
+
+ break;
+ }
+
+ ret = default_notify (this, event, data);
+
+ return ret;
+}
+
generated by cgit (git 2.34.1) at 2024-11-12 18:37:14 +0000