md-cache: replace stat-prefetch with md-cache in a backward compatible way

- preserve CLI set option key as "performance.stat-prefetch"
- create a symlink stat-prefetch.so to point to md-cache.so

Change-Id: Ib95e7c30073f13ae04c39e9466967ba1db5a0614
BUG: 765785
Reviewed-on: http://review.gluster.com/2714
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

8 files changed, 11 insertions, 4427 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index f3d29434161..9bd1a2d1b14 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -170,7 +170,7 @@ static struct volopt_map_entry glusterd_volopt_map[] = {
         {"performance.read-ahead",               "performance/read-ahead",    "!perf", "on", NO_DOC, 0},
         {"performance.io-cache",                 "performance/io-cache",      "!perf", "on", NO_DOC, 0},
         {"performance.quick-read",               "performance/quick-read",    "!perf", "on", NO_DOC, 0},
-        {VKEY_PERF_STAT_PREFETCH,                "performance/stat-prefetch", "!perf", "on", NO_DOC, 0},
+        {VKEY_PERF_STAT_PREFETCH,                "performance/md-cache",      "!perf", "on", NO_DOC, 0},
         {"performance.client-io-threads",        "performance/io-threads",    "!perf", "off", NO_DOC, 0},
         {VKEY_MARKER_XTIME,                      "features/marker",           "xtime", "off", NO_DOC, OPT_FLAG_FORCE},
         {VKEY_MARKER_XTIME,                      "features/marker",           "!xtime", "off", NO_DOC, OPT_FLAG_FORCE},
diff --git a/xlators/performance/Makefile.am b/xlators/performance/Makefile.am
index 2fc145e4021..eb94d8d6a1c 100644
--- a/xlators/performance/Makefile.am
+++ b/xlators/performance/Makefile.am
@@ -1,3 +1,3 @@
-SUBDIRS = write-behind read-ahead io-threads io-cache symlink-cache quick-read stat-prefetch md-cache
+SUBDIRS = write-behind read-ahead io-threads io-cache symlink-cache quick-read md-cache
 
 CLEANFILES = 
diff --git a/xlators/performance/md-cache/src/Makefile.am b/xlators/performance/md-cache/src/Makefile.am
index 6031c223fa9..150e7243e35 100644
--- a/xlators/performance/md-cache/src/Makefile.am
+++ b/xlators/performance/md-cache/src/Makefile.am
@@ -12,3 +12,12 @@ AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
 	-I$(top_srcdir)/libglusterfs/src -I$(CONTRIBDIR)/rbtree -shared -nostartfiles $(GF_CFLAGS)
 
 CLEANFILES =
+
+
+stat-prefetch-compat:
+	mkdir -p $(DESTDIR)$(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance
+	rm -rf $(DESTDIR)$(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance/stat-prefetch.so
+	ln -s ./md-cache.so $(DESTDIR)$(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance/stat-prefetch.so
+
+
+install-exec-local: stat-prefetch-compat
diff --git a/xlators/performance/stat-prefetch/Makefile.am b/xlators/performance/stat-prefetch/Makefile.am
deleted file mode 100644
index af437a64d6d..00000000000
--- a/xlators/performance/stat-prefetch/Makefile.am
+++ /dev/null
@@ -1 +0,0 @@
-SUBDIRS = src
diff --git a/xlators/performance/stat-prefetch/src/Makefile.am b/xlators/performance/stat-prefetch/src/Makefile.am
deleted file mode 100644
index cfb13071486..00000000000
--- a/xlators/performance/stat-prefetch/src/Makefile.am
+++ /dev/null
@@ -1,14 +0,0 @@
-xlator_LTLIBRARIES = stat-prefetch.la
-xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance
-
-stat_prefetch_la_LDFLAGS = -module -avoidversion
-stat_prefetch_la_SOURCES = stat-prefetch.c
-noinst_HEADERS = stat-prefetch.h stat-prefetch-mem-types.h
-
-stat_prefetch_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la
-
-AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\
-	-I$(top_srcdir)/libglusterfs/src -I$(CONTRIBDIR)/rbtree -shared -nostartfiles $(GF_CFLAGS)
-
-CLEANFILES = 
-
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch-mem-types.h b/xlators/performance/stat-prefetch/src/stat-prefetch-mem-types.h
deleted file mode 100644
index 156b3472bc6..00000000000
--- a/xlators/performance/stat-prefetch/src/stat-prefetch-mem-types.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
-  Copyright (c) 2008-2011 Gluster, Inc. <http://www.gluster.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 __SP_MEM_TYPES_H__
-#define __SP_MEM_TYPES_H__
-
-#include "mem-types.h"
-
-enum gf_sp_mem_types_ {
-        gf_sp_mt_sp_cache_t   = gf_common_mt_end + 1,
-        gf_sp_mt_sp_fd_ctx_t,
-        gf_sp_mt_stat,
-        gf_sp_mt_sp_local_t,
-        gf_sp_mt_sp_inode_ctx_t,
-        gf_sp_mt_sp_private_t,
-        gf_sp_mt_fd_wrapper_t,
-        gf_sp_mt_end
-};
-#endif
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.c b/xlators/performance/stat-prefetch/src/stat-prefetch.c
deleted file mode 100644
index 25ed6fa57b9..00000000000
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.c
+++ /dev/null
@@ -1,4268 +0,0 @@
-/*
-  Copyright (c) 2009-2011 Gluster, Inc. <http://www.gluster.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/>.
-*/
-
-#include "stat-prefetch.h"
-#include "statedump.h"
-#include "fd.h"
-
-#define GF_SP_CACHE_BUCKETS 1
-#define GF_SP_CACHE_ENTRIES_EXPECTED (128 * 1024) //1048576
-
-typedef enum {
-        SP_EXPECT,
-        SP_DONT_EXPECT,
-        SP_DONT_CARE
-} sp_expect_t;
-
-
-void
-sp_inode_ctx_free (xlator_t *this, sp_inode_ctx_t *ctx)
-{
-        call_stub_t *stub = NULL, *tmp = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, ctx, out);
-
-        LOCK (&ctx->lock);
-        {
-                if (!list_empty (&ctx->waiting_ops)) {
-                        gf_log (this->name, GF_LOG_WARNING, "inode ctx is "
-                                "being freed even when there are file "
-                                "operations waiting for lookup-behind to "
-                                "complete. The operations in the waiting list "
-                                "are:");
-                        list_for_each_entry_safe (stub, tmp, &ctx->waiting_ops,
-                                                  list) {
-                                gf_log (this->name, GF_LOG_WARNING,
-                                        "OP (%s)", gf_fop_list[stub->fop]);
-
-                                list_del_init (&stub->list);
-                                call_stub_destroy (stub);
-                        }
-                }
-        }
-        UNLOCK (&ctx->lock);
-
-        LOCK_DESTROY (&ctx->lock);
-        GF_FREE (ctx);
-
-out:
-        return;
-}
-
-
-sp_inode_ctx_t *
-sp_inode_ctx_init ()
-{
-        sp_inode_ctx_t *inode_ctx = NULL;
-
-        inode_ctx = GF_CALLOC (1, sizeof (*inode_ctx), gf_sp_mt_sp_inode_ctx_t);
-        if (inode_ctx == NULL) {
-                goto out;
-        }
-
-        LOCK_INIT (&inode_ctx->lock);
-        INIT_LIST_HEAD (&inode_ctx->waiting_ops);
-
-out:
-        return inode_ctx;
-}
-
-
-int
-sp_update_inode_ctx (xlator_t *this, inode_t *inode, int32_t *op_ret,
-                     int32_t *op_errno, char *lookup_in_progress,
-                     char *looked_up, struct iatt *stbuf,
-                     struct list_head *waiting_ops, int32_t *error)
-{
-        int32_t         ret       = -1;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        uint64_t        value     = 0;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, inode, out);
-
-        ret = inode_ctx_get (inode, this, &value);
-        if (ret == 0) {
-                inode_ctx = (sp_inode_ctx_t *)(long)value;
-        }
-
-        if (inode_ctx == NULL) {
-                ret = -1;
-                if (error != NULL) {
-                        *error = EINVAL;
-                }
-
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode "
-                        "(gfid:%s)", uuid_utoa (inode->gfid));
-                goto out;
-        }
-
-        LOCK (&inode_ctx->lock);
-        {
-                if (op_ret != NULL) {
-                        inode_ctx->op_ret = *op_ret;
-                }
-
-                if (op_errno != NULL) {
-                        inode_ctx->op_errno = *op_errno;
-                }
-
-                if (looked_up != NULL) {
-                        inode_ctx->looked_up = *looked_up;
-                }
-
-                if (lookup_in_progress != NULL) {
-                        inode_ctx->lookup_in_progress = *lookup_in_progress;
-                }
-
-                if ((op_ret != NULL ) && (*op_ret == 0) && (stbuf != NULL)
-                    && IA_ISDIR (stbuf->ia_type)) {
-                        memcpy (&inode_ctx->stbuf, stbuf, sizeof (*stbuf));
-                }
-
-                if (waiting_ops != NULL) {
-                        list_splice_init (&inode_ctx->waiting_ops, waiting_ops);
-                }
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        ret = 0;
-
-out:
-        return ret;
-}
-
-
-sp_inode_ctx_t *
-sp_check_and_create_inode_ctx (xlator_t *this, inode_t *inode,
-                               sp_expect_t expect)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, inode, out);
-
-        LOCK (&inode->lock);
-        {
-                ret = __inode_ctx_get (inode, this, &value);
-                if (ret == 0) {
-                        inode_ctx = (sp_inode_ctx_t *)(long)value;
-
-                        if ((expect == SP_DONT_EXPECT) && (inode_ctx != NULL)) {
-                                gf_log_callingfn (this->name, GF_LOG_WARNING,
-                                                  "stat-prefetch context is "
-                                                  "present in inode "
-                                                  "(gfid:%s) "
-                                                  "when it is supposed to be "
-                                                  "not present",
-                                                  uuid_utoa (inode->gfid));
-                        }
-                } else {
-                        if (expect == SP_EXPECT) {
-                                gf_log_callingfn (this->name, GF_LOG_WARNING,
-                                                  "stat-prefetch context is "
-                                                  "not present in inode "
-                                                  "(gfid:%s)"
-                                                  " when it is supposed to be "
-                                                  "present",
-                                                  uuid_utoa (inode->gfid));
-                        }
-
-                        inode_ctx = sp_inode_ctx_init ();
-                        if (inode_ctx != NULL) {
-                                ret = __inode_ctx_put (inode, this,
-                                                       (long)inode_ctx);
-                                if (ret == -1) {
-                                        sp_inode_ctx_free (this, inode_ctx);
-                                        inode_ctx = NULL;
-                                }
-                        }
-                }
-        }
-        UNLOCK (&inode->lock);
-
-out:
-        return inode_ctx;
-}
-
-
-sp_cache_t *
-sp_cache_ref (sp_cache_t *cache)
-{
-        if (cache == NULL) {
-                goto out;
-        }
-
-        LOCK (&cache->lock);
-        {
-                cache->ref++;
-        }
-        UNLOCK (&cache->lock);
-
-out:
-        return cache;;
-}
-
-
-void
-sp_cache_unref (sp_cache_t *cache)
-{
-        int refcount = 0;
-
-        if (cache == NULL) {
-                goto out;
-        }
-
-        LOCK (&cache->lock);
-        {
-                refcount = --cache->ref;
-        }
-        UNLOCK (&cache->lock);
-
-        if (refcount == 0) {
-                rbthash_table_destroy (cache->table);
-                GF_FREE (cache);
-        }
-
-out:
-        return;
-}
-
-
-int32_t
-sp_process_inode_ctx (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                      call_stub_t *stub, char *need_unwind, char *need_lookup,
-                      char *can_wind, int32_t *error)
-{
-        int32_t         ret          = -1, op_errno = EINVAL;
-        sp_local_t     *local        = NULL;
-        sp_inode_ctx_t *inode_ctx    = NULL;
-        uint64_t        value        = 0;
-
-        if (need_unwind != NULL) {
-                *need_unwind = 1;
-        }
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", frame, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, loc->inode, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, need_unwind, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, need_lookup, out);
-        GF_VALIDATE_OR_GOTO (frame->this->name, can_wind, out);
-
-        inode_ctx_get (loc->inode, this, &value);
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        if (inode_ctx == NULL) {
-                gf_log_callingfn (this->name, GF_LOG_WARNING,
-                                  "stat-prefetch context not set in inode "
-                                  "(gfid:%s)", uuid_utoa (loc->inode->gfid));
-                *can_wind = 1;
-                *need_unwind = 0;
-                op_errno = 0;
-                ret = 0;
-                goto out;
-        }
-
-        LOCK (&inode_ctx->lock);
-        {
-                if (!(inode_ctx->looked_up || inode_ctx->lookup_in_progress)) {
-                        if (frame->local == NULL) {
-                                local = GF_CALLOC (1, sizeof (*local),
-                                                   gf_sp_mt_sp_local_t);
-                                if (local == NULL) {
-                                        op_errno = ENOMEM;
-                                        goto unlock;
-                                }
-
-                                frame->local = local;
-
-                                ret = loc_copy (&local->loc, loc);
-                                if (ret == -1) {
-                                        op_errno = errno;
-                                        gf_log (this->name, GF_LOG_WARNING,
-                                                "loc_copy failed (%s)",
-                                                strerror (op_errno));
-                                        goto unlock;
-                                }
-                        }
-
-                        *need_lookup = 1;
-                        inode_ctx->lookup_in_progress = 1;
-                }
-
-                if (inode_ctx->looked_up) {
-                        *can_wind = 1;
-                } else {
-                        list_add_tail (&stub->list, &inode_ctx->waiting_ops);
-                        stub = NULL;
-                }
-
-                *need_unwind = 0;
-                ret = 0;
-        }
-unlock:
-        UNLOCK (&inode_ctx->lock);
-
-out:
-        if (stub != NULL) {
-                call_stub_destroy (stub);
-        }
-
-        if (error != NULL) {
-                *error = op_errno;
-        }
-
-        return ret;
-}
-
-
-inline uint32_t
-sp_hashfn (void *data, int len)
-{
-        return gf_dm_hashfn ((const char *)data, len);
-}
-
-
-sp_cache_t *
-sp_cache_init (xlator_t *this)
-{
-        sp_cache_t      *cache = NULL;
-        sp_private_t    *priv  = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-
-        priv = this->private;
-        GF_VALIDATE_OR_GOTO (this->name, priv, out);
-        GF_VALIDATE_OR_GOTO (this->name, priv->mem_pool, out);
-
-        cache = GF_CALLOC (1, sizeof (*cache), gf_sp_mt_sp_cache_t);
-        if (cache) {
-                cache->table =
-                        rbthash_table_init (GF_SP_CACHE_BUCKETS,
-                                            sp_hashfn, __gf_free,
-                                            0, priv->mem_pool);
-                if (cache->table == NULL) {
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "cannot init a new rbthash table to hold "
-                                "cache");
-                        GF_FREE (cache);
-                        cache = NULL;
-                        goto out;
-                }
-
-                LOCK_INIT (&cache->lock);
-                cache->this = this;
-        }
-
-out:
-        return cache;
-}
-
-
-void
-sp_local_free (sp_local_t *local)
-{
-        if (local) {
-                loc_wipe (&local->loc);
-                GF_FREE (local);
-        }
-}
-
-
-int32_t
-sp_cache_remove_entry (sp_cache_t *cache, char *name, char remove_all)
-{
-        int32_t          ret   = -1;
-        rbthash_table_t *table = NULL;
-        xlator_t        *this  = NULL;
-        sp_private_t    *priv  = NULL;
-        void            *data  = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", cache, out);
-        if ((name == NULL) && !remove_all) {
-                gf_log ((cache->this ? cache->this->name : "stat-prefetch"),
-                        GF_LOG_WARNING,
-                        "request to remove a single entry from cache and is no "
-                        "name passed to identify it");
-                goto out;
-        }
-
-        this = cache->this;
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, this->private, out);
-
-        priv = this->private;
-
-        LOCK (&cache->lock);
-        {
-                if (remove_all) {
-                        table = cache->table;
-                        cache->table = rbthash_table_init (GF_SP_CACHE_BUCKETS,
-                                                           sp_hashfn, __gf_free,
-                                                           0, priv->mem_pool);
-                        if (cache->table == NULL) {
-                                cache->table = table;
-                        } else {
-                                rbthash_table_destroy (table);
-                                ret = 0;
-                                if (priv) {
-                                        LOCK (&priv->lock);
-                                        {
-                                                priv->entries = 0;
-                                        }
-                                        UNLOCK (&priv->lock);
-                                }
-                        }
-                } else {
-                        data = rbthash_remove (cache->table, name,
-                                               strlen (name));
-                        GF_FREE (data);
-                        ret = 0;
-                        if (priv) {
-                                LOCK (&priv->lock);
-                                {
-                                        priv->entries--;
-                                }
-                                UNLOCK (&priv->lock);
-                        }
-                }
-        }
-        UNLOCK (&cache->lock);
-
-out:
-        return ret;
-}
-
-
-int32_t
-sp_cache_get_entry (sp_cache_t *cache, char *name, gf_dirent_t **entry)
-{
-        int32_t      ret = -1;
-        gf_dirent_t *tmp = NULL, *new = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", cache, out);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", cache->this, out);
-        GF_VALIDATE_OR_GOTO (cache->this->name, name, out);
-        GF_VALIDATE_OR_GOTO (cache->this->name, entry, out);
-
-        LOCK (&cache->lock);
-        {
-                tmp = rbthash_get (cache->table, name, strlen (name));
-                if (tmp != NULL) {
-                        new = gf_dirent_for_name (tmp->d_name);
-                        if (new == NULL) {
-                                gf_log (cache->this->name, GF_LOG_WARNING,
-                                        "cannot create a new dentry to copy "
-                                        "from cache");
-                                goto unlock;
-                        }
-
-                        new->d_ino  = tmp->d_ino;
-                        new->d_off  = tmp->d_off;
-                        new->d_len  = tmp->d_len;
-                        new->d_type = tmp->d_type;
-                        new->d_stat = tmp->d_stat;
-
-                        *entry = new;
-                        ret = 0;
-                }
-        }
-unlock:
-        UNLOCK (&cache->lock);
-
-out:
-        return ret;
-}
-
-
-void
-sp_cache_free (sp_cache_t *cache)
-{
-        sp_cache_remove_entry (cache, NULL, 1);
-        sp_cache_unref (cache);
-}
-
-
-sp_cache_t *
-__sp_get_cache_fd (xlator_t *this, fd_t *fd)
-{
-        int32_t      ret   = -1;
-        sp_cache_t  *cache = NULL;
-        uint64_t     value = 0;
-        sp_fd_ctx_t *fd_ctx = NULL;
-
-        ret = __fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                goto out;
-        }
-
-        fd_ctx = (void *)(long) value;
-
-        cache = fd_ctx->cache;
-
-out:
-        return cache;
-}
-
-
-sp_cache_t *
-sp_get_cache_fd (xlator_t *this, fd_t *fd)
-{
-        sp_cache_t  *cache     = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, fd, out);
-
-        LOCK (&fd->lock);
-        {
-                cache = __sp_get_cache_fd (this, fd);
-                if (cache != NULL) {
-                        sp_cache_ref (cache);
-                }
-        }
-        UNLOCK (&fd->lock);
-
-out:
-        return cache;
-}
-
-
-void
-sp_fd_ctx_free (sp_fd_ctx_t *fd_ctx)
-{
-        if (fd_ctx == NULL) {
-                goto out;
-        }
-
-        if (fd_ctx->parent_inode) {
-                inode_unref (fd_ctx->parent_inode);
-                fd_ctx->parent_inode = NULL;
-        }
-
-        if (fd_ctx->name) {
-                GF_FREE (fd_ctx->name);
-                fd_ctx->name = NULL;
-        }
-
-        if (fd_ctx->cache) {
-                sp_cache_free (fd_ctx->cache);
-        }
-
-        GF_FREE (fd_ctx);
-out:
-        return;
-}
-
-
-inline sp_fd_ctx_t *
-sp_fd_ctx_init (void)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-
-        fd_ctx = GF_CALLOC (1, sizeof (*fd_ctx), gf_sp_mt_sp_fd_ctx_t);
-
-        return fd_ctx;
-}
-
-
-sp_fd_ctx_t *
-sp_fd_ctx_new (xlator_t *this, inode_t *parent, char *name, sp_cache_t *cache)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-
-        fd_ctx = sp_fd_ctx_init ();
-        if (fd_ctx == NULL) {
-                goto out;
-        }
-
-        if (parent) {
-                fd_ctx->parent_inode = inode_ref (parent);
-        }
-
-        if (name) {
-                fd_ctx->name = gf_strdup (name);
-                if (fd_ctx->name == NULL) {
-                        sp_fd_ctx_free (fd_ctx);
-                        fd_ctx = NULL;
-                        goto out;
-                }
-        }
-
-        fd_ctx->cache = cache;
-
-out:
-        return fd_ctx;
-}
-
-
-sp_cache_t *
-sp_del_cache_fd (xlator_t *this, fd_t *fd)
-{
-        sp_cache_t  *cache  = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = -1;
-        sp_fd_ctx_t *fd_ctx = NULL;
-
-        if (fd == NULL) {
-                goto out;
-        }
-
-        LOCK (&fd->lock);
-        {
-                ret = __fd_ctx_get (fd, this, &value);
-                if (ret == 0) {
-                        fd_ctx = (void *)(long) value;
-                        cache = fd_ctx->cache;
-                        fd_ctx->cache = NULL;
-                }
-        }
-        UNLOCK (&fd->lock);
-
-out:
-        return cache;
-}
-
-
-sp_cache_t *
-sp_get_cache_inode (xlator_t *this, inode_t *inode, int32_t pid)
-{
-        fd_t       *fd    = NULL;
-        sp_cache_t *cache = NULL;
-
-        if (inode == NULL) {
-                goto out;
-        }
-
-        fd = fd_lookup (inode, pid);
-        if (fd == NULL) {
-                goto out;
-        }
-
-        cache = sp_get_cache_fd (this, fd);
-
-        fd_unref (fd);
-out:
-        return cache;
-}
-
-
-void
-sp_remove_caches_from_all_fds_opened (xlator_t *this, inode_t *inode,
-                                      char *name)
-{
-        fd_t       *fd    = NULL;
-        sp_cache_t *cache = NULL;
-        struct fd_wrapper {
-                fd_t             *fd;
-                struct list_head  list;
-        };
-
-        struct fd_wrapper *wrapper    = NULL, *tmp = NULL;
-        struct list_head   head       = {0, };
-        char               remove_all = 0;
-
-        wrapper = NULL;
-
-        INIT_LIST_HEAD (&head);
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, inode, out);
-
-        remove_all = (name == NULL);
-
-        LOCK (&inode->lock);
-        {
-                list_for_each_entry (fd, &inode->fd_list, inode_list) {
-                        wrapper = GF_CALLOC (1, sizeof (*wrapper),
-                                             gf_sp_mt_fd_wrapper_t);
-                        if (wrapper == NULL) {
-                                goto unlock;
-                        }
-
-                        INIT_LIST_HEAD (&wrapper->list);
-
-                        wrapper->fd = __fd_ref (fd);
-                        list_add_tail (&wrapper->list, &head);
-                }
-        }
-unlock:
-        UNLOCK (&inode->lock);
-
-        list_for_each_entry_safe (wrapper, tmp, &head, list) {
-                cache = sp_get_cache_fd (this, wrapper->fd);
-                if (cache) {
-                        sp_cache_remove_entry (cache, name, remove_all);
-                        sp_cache_unref (cache);
-                }
-
-                list_del (&wrapper->list);
-                fd_unref (wrapper->fd);
-                GF_FREE (wrapper);
-        }
-
-out:
-        return;
-}
-
-
-inline int32_t
-__sp_put_cache (xlator_t *this, fd_t *fd, sp_cache_t *cache)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        int32_t      ret    = -1;
-        uint64_t     value  = 0;
-
-        ret = __fd_ctx_get (fd, this, &value);
-        if (!ret) {
-                fd_ctx = (void *)(long)value;
-        } else {
-                fd_ctx = sp_fd_ctx_init ();
-                if (fd_ctx == NULL) {
-                        ret = -1;
-                        goto out;
-                }
-
-                ret = __fd_ctx_set (fd, this, (long)(void *)fd_ctx);
-                if (ret == -1) {
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "cannot set stat-prefetch context in fd (%p) "
-                                "opened on inode (gfid:%s)",
-                                fd, uuid_utoa (fd->inode->gfid));
-                        sp_fd_ctx_free (fd_ctx);
-                        goto out;
-                }
-        }
-
-        if (fd_ctx->cache) {
-                sp_cache_free (fd_ctx->cache);
-        }
-
-        fd_ctx->cache = cache;
-
-out:
-        return ret;
-}
-
-
-inline int32_t
-sp_put_cache (xlator_t *this, fd_t *fd, sp_cache_t *cache)
-{
-        int32_t ret = -1;
-
-        if (fd != NULL) {
-                LOCK (&fd->lock);
-                {
-                        ret = __sp_put_cache (this, fd, cache);
-                }
-                UNLOCK (&fd->lock);
-        }
-
-        return ret;
-}
-
-
-int32_t
-sp_cache_add_entries (sp_cache_t *cache, gf_dirent_t *entries)
-{
-        gf_dirent_t *entry           = NULL, *new = NULL;
-        int32_t      ret             = -1;
-        uint64_t     expected_offset = 0;
-        xlator_t     *this           = NULL;
-        sp_private_t *priv           = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", cache, out);
-
-        this = cache->this;
-        if (this && this->private) {
-                priv = this->private;
-        }
-
-        LOCK (&cache->lock);
-        {
-                list_for_each_entry (entry, &entries->list, list) {
-                        if (IA_ISDIR (entry->d_stat.ia_type)) {
-                                continue;
-                        }
-
-                        if (uuid_is_null (entry->d_stat.ia_gfid))
-                                continue;
-
-                        new = gf_dirent_for_name (entry->d_name);
-                        if (new == NULL) {
-                                gf_log (cache->this->name, GF_LOG_WARNING,
-                                        "cannot create a new dentry to store "
-                                        "in cache");
-                                goto unlock;
-                        }
-
-                        new->d_ino  = entry->d_ino;
-                        new->d_off  = entry->d_off;
-                        new->d_len  = entry->d_len;
-                        new->d_type = entry->d_type;
-                        new->d_stat = entry->d_stat;
-
-                        ret = rbthash_insert (cache->table, new, new->d_name,
-                                              strlen (new->d_name));
-                        if (ret == -1) {
-                                gf_log (this->name, GF_LOG_WARNING, "cannot "
-                                        "insert dentry (name:%s) into cache",
-                                        new->d_name);
-
-                                GF_FREE (new);
-                                continue;
-                        }
-
-                        expected_offset = new->d_off;
-                        if (priv) {
-                                LOCK (&priv->lock);
-                                {
-                                        priv->entries++;
-                                }
-                                UNLOCK (&priv->lock);
-                        }
-                }
-
-                cache->expected_offset = expected_offset;
-
-                ret = 0;
-        }
-unlock:
-        UNLOCK (&cache->lock);
-
-out:
-        return ret;
-}
-
-
-int32_t
-sp_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 *dict, struct iatt *postparent)
-{
-        struct list_head     waiting_ops = {0, };
-        call_stub_t         *stub        = NULL, *tmp = NULL;
-        sp_local_t          *local       = NULL;
-        int                  need_unwind = 0;
-        char                 looked_up   = 0, lookup_in_progress = 0;
-
-        GF_ASSERT (frame);
-
-        INIT_LIST_HEAD (&waiting_ops);
-
-        local = frame->local;
-        if (local == NULL) {
-                op_ret = -1;
-                op_errno = EINVAL;
-                gf_log (this->name, GF_LOG_WARNING, "local is NULL, but it is "
-                        "needed to find and resume operations waiting on "
-                        "lookup");
-                goto out;
-        }
-
-        if (this == NULL) {
-                op_ret = -1;
-                op_errno = EINVAL;
-                gf_log (frame->this ? frame->this->name : "stat-prefetch",
-                        GF_LOG_WARNING, "xlator object (this) is NULL");
-                goto out;
-        }
-
-        /* For '/' Entry is never cached, don't try to remove it */
-        if ((op_ret == -1) && local->loc.parent) {
-                sp_remove_caches_from_all_fds_opened (this, local->loc.parent,
-                                                      (char *)local->loc.name);
-        }
-
-        if (local->is_lookup)
-                need_unwind = 1;
-
-        lookup_in_progress = 0;
-        looked_up = 1;
-        sp_update_inode_ctx (this, local->loc.inode, &op_ret, &op_errno,
-                             &lookup_in_progress, &looked_up, buf,
-                             &waiting_ops, &op_errno);
-
-        list_for_each_entry_safe (stub, tmp, &waiting_ops, list) {
-                list_del_init (&stub->list);
-                call_resume (stub);
-        }
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (lookup, frame, op_ret, op_errno, inode, buf,
-                                 dict, postparent);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_get_ancestors (char *path, char **parent, char **grand_parent)
-{
-        int32_t  ret = -1, i = 0;
-        char    *cpy = NULL, *tmp = NULL;
-
-        if (!path || !parent || !grand_parent) {
-                ret = 0;
-                goto out;
-        }
-
-        for (i = 0; i < 2; i++) {
-                if (!strcmp (path, "/")) {
-                        break;
-                }
-
-                tmp = cpy;
-
-                cpy = gf_strdup (path);
-
-                if (tmp != NULL) {
-                        GF_FREE (tmp);
-                }
-
-                if (cpy == NULL) {
-                        ret = -errno;
-                        goto out;
-                }
-
-                path = dirname (cpy);
-                switch (i)
-                {
-                case 0:
-                        *parent = gf_strdup (path);
-			if (*parent == NULL)
-				goto out;
-                        break;
-                case 1:
-                        *grand_parent = gf_strdup (path);
-			if (*grand_parent == NULL)
-				goto out;
-                        break;
-                }
-        }
-
-        ret = 0;
-out:
-	if (cpy != NULL)
-		GF_FREE(cpy);
-        return ret;
-}
-
-
-int32_t
-sp_cache_remove_parent_entry (call_frame_t *frame, xlator_t *this,
-                              inode_table_t *itable, char *path)
-{
-        char       *parent    = NULL, *grand_parent = NULL, *cpy = NULL;
-        inode_t    *inode_gp  = NULL;
-        int32_t     ret       = -1;
-
-        ret = sp_get_ancestors (path, &parent, &grand_parent);
-        if (ret < 0) {
-                goto out;
-        }
-
-        if (grand_parent && strcmp (grand_parent, "/")) {
-                inode_gp = inode_from_path (itable, grand_parent);
-                if (inode_gp) {
-                        cpy = gf_strdup (parent);
-                        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name,
-                                                        cpy, out, ret,
-                                                        -ENOMEM);
-                        path = basename (cpy);
-                        sp_remove_caches_from_all_fds_opened (this, inode_gp,
-                                                              path);
-                        GF_FREE (cpy);
-
-                        inode_unref (inode_gp);
-                }
-        }
-
-        ret = 0;
-out:
-        if (parent) {
-                GF_FREE (parent);
-        }
-
-        if (grand_parent) {
-                GF_FREE (grand_parent);
-        }
-
-        return ret;
-}
-
-
-void
-sp_is_empty (dict_t *this, char *key, data_t *value, void *data)
-{
-        char *ptr = data;
-
-        if (strcmp (key, "gfid-req") == 0)
-                return;
-
-        if (ptr && *ptr) {
-                *ptr = 0;
-        }
-}
-
-
-int32_t
-sp_lookup_helper (call_frame_t *frame,xlator_t *this, loc_t *loc,
-                  dict_t *xattr_req)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-        call_stub_t    *stub      = NULL;
-        char            can_wind  = 0;
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode "
-                        "(gfid:%s)", uuid_utoa (loc->inode->gfid));
-                op_errno = EINVAL;
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno,
-                                        EINVAL);
-
-        stub = fop_lookup_stub (frame, sp_lookup_helper, loc, xattr_req);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind,
-                                        op_errno, ENOMEM);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-                if (op_ret == 0) {
-                        if (!inode_ctx->lookup_in_progress) {
-                                inode_ctx->lookup_in_progress = 1;
-                                can_wind = 1;
-                        } else {
-                                list_add_tail (&stub->list,
-                                               &inode_ctx->waiting_ops);
-                                stub = NULL;
-                        }
-                }
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                goto unwind;
-        }
-
-        if (can_wind) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc,
-                            xattr_req);
-        }
-
-        if (stub != NULL) {
-                call_stub_destroy (stub);
-        }
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL);
-        if (stub != NULL) {
-                call_stub_destroy (stub);
-        }
-
-        return 0;
-}
-
-
-/*
- * TODO: implement sending lookups for every fop done on this path. As of now
- * lookup on the path is sent only for the first fop on this path.
- */
-int32_t
-sp_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req)
-{
-        gf_dirent_t    *dirent          = NULL;
-        char            entry_cached    = 0;
-        uint64_t        value           = 0;
-        char            xattr_req_empty = 1, can_wind = 0;
-        sp_cache_t     *cache           = NULL;
-        struct iatt     postparent      = {0, }, buf = {0, };
-        int32_t         ret             = -1, op_ret = -1, op_errno = EINVAL;
-        sp_inode_ctx_t *inode_ctx       = NULL, *parent_inode_ctx = NULL;
-        sp_local_t     *local           = NULL;
-        call_stub_t    *stub            = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind);
-        GF_VALIDATE_OR_GOTO (frame->this->name, loc, unwind);
-        GF_VALIDATE_OR_GOTO (frame->this->name, loc->inode, unwind);
-
-        inode_ctx = sp_check_and_create_inode_ctx (this, loc->inode,
-                                                   SP_DONT_CARE);
-        if (inode_ctx == NULL) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot create stat-prefetch context in inode "
-                        "(gfid:%s)(%s)",
-                        uuid_utoa (loc->inode->gfid), strerror (op_errno));
-                goto unwind;
-        }
-
-        if ((loc->parent == NULL) || (loc->name == NULL)) {
-                goto wind;
-        }
-
-        if (xattr_req != NULL) {
-                dict_foreach (xattr_req, sp_is_empty, &xattr_req_empty);
-        }
-
-        if (!xattr_req_empty) {
-                goto wind;
-        }
-
-        cache = sp_get_cache_inode (this, loc->parent, frame->root->pid);
-        if (cache) {
-                ret = sp_cache_get_entry (cache, (char *)loc->name, &dirent);
-                if (ret == 0) {
-                        if (!uuid_is_null (loc->inode->gfid)
-                            && (uuid_compare (loc->inode->gfid,
-                                              dirent->d_stat.ia_gfid))
-                                != 0) {
-                                op_ret = -1;
-                                op_errno = ESTALE;
-                                goto unwind;
-                        }
-
-                        ret = inode_ctx_get (loc->parent, this, &value);
-                        if ((ret == 0) && (value != 0)) {
-                                parent_inode_ctx = (void *)(long)value;
-                                postparent = parent_inode_ctx->stbuf;
-                                buf = dirent->d_stat;
-                                op_ret = 0;
-                                op_errno = 0;
-                                entry_cached = 1;
-                        }
-
-                        GF_FREE (dirent);
-                }
-        } else if (IA_ISDIR (loc->inode->ia_type)) {
-                cache = sp_get_cache_inode (this, loc->inode, frame->root->pid);
-                if (cache) {
-                        ret = sp_cache_get_entry (cache, ".", &dirent);
-                        if (ret == 0) {
-                                ret = inode_ctx_get (loc->parent, this, &value);
-                                if ((ret == 0) && (value != 0)) {
-                                        parent_inode_ctx = (void *)(long)value;
-                                        postparent = parent_inode_ctx->stbuf;
-                                        buf = dirent->d_stat;
-                                        op_ret = 0;
-                                        op_errno = 0;
-                                        entry_cached = 1;
-                                }
-
-                                GF_FREE (dirent);
-                        }
-                }
-        }
-
-wind:
-        if (entry_cached) {
-                if (cache) {
-                        cache->hits++;
-                        sp_cache_unref (cache);
-                }
-        } else {
-                if (cache) {
-                        cache->miss++;
-                        sp_cache_unref (cache);
-                }
-
-                stub = fop_lookup_stub (frame, sp_lookup_helper, loc,
-                                        xattr_req);
-                GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind,
-                                                op_errno, ENOMEM);
-
-                local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-                GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, unwind,
-                                                op_errno, ENOMEM);
-
-                frame->local = local;
-
-                ret = loc_copy (&local->loc, loc);
-                if (ret == -1) {
-                        op_errno = errno;
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "loc_copy failed (%s)", strerror (op_errno));
-                        goto unwind;
-                }
-
-                local->is_lookup = 1;
-
-                LOCK (&inode_ctx->lock);
-                {
-                        if (inode_ctx->lookup_in_progress) {
-                                list_add_tail (&stub->list,
-                                               &inode_ctx->waiting_ops);
-                                stub = NULL;
-                        } else {
-                                can_wind = 1;
-                                inode_ctx->lookup_in_progress = 1;
-                        }
-                }
-                UNLOCK (&inode_ctx->lock);
-
-                if (can_wind) {
-                        STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                                    FIRST_CHILD(this)->fops->lookup, loc,
-                                    xattr_req);
-                }
-
-                if (stub != NULL) {
-                        call_stub_destroy (stub);
-                }
-
-                return 0;
-        }
-
-unwind:
-        SP_STACK_UNWIND (lookup, frame, op_ret, op_errno, (loc)?loc->inode:NULL,
-                         &buf, NULL, &postparent);
-
-        return 0;
-}
-
-
-int32_t
-sp_readdir_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, gf_dirent_t *entries)
-{
-        sp_local_t      *local       = NULL;
-        sp_cache_t      *cache       = NULL;
-        fd_t            *fd          = NULL;
-        int32_t          ret         = 0;
-        char             was_present = 1;
-        sp_private_t    *priv        = NULL;
-
-        GF_ASSERT (frame);
-        if (op_ret == -1) {
-                goto out;
-        }
-
-        if ((this == NULL) || (this->private == NULL)) {
-                gf_log (frame->this->name, GF_LOG_WARNING,
-                        (this == NULL) ? "xlator object (this) is NULL"
-                        : "stat-prefetch configuration (this->private) is "
-                        "NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        local = frame->local;
-        if (local == NULL) {
-                gf_log (frame->this->name, GF_LOG_WARNING, "local is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        fd = local->fd;
-
-        priv = this->private;
-
-        LOCK (&priv->lock);
-        {
-                if (!priv->mem_pool)
-                        priv->mem_pool =  mem_pool_new (rbthash_entry_t,
-                                                        GF_SP_CACHE_ENTRIES_EXPECTED);
-        }
-        UNLOCK (&priv->lock);
-
-        if (!priv->mem_pool)
-                goto out;
-
-        LOCK (&fd->lock);
-        {
-                cache = __sp_get_cache_fd (this, fd);
-                if (cache == NULL) {
-                        was_present = 0;
-                        cache = sp_cache_init (this);
-                        if (cache == NULL) {
-                                gf_log (this->name, GF_LOG_WARNING,
-                                        "creation of stat-prefetch cache "
-                                        "for fd (%p) opened on inode "
-                                        "(gfid:%s) failed", fd,
-                                        uuid_utoa (fd->inode->gfid));
-                                goto unlock;
-                        }
-
-                        ret = __sp_put_cache (this, fd, cache);
-                        if (ret == -1) {
-                                sp_cache_free (cache);
-                                gf_log (this->name, GF_LOG_WARNING,
-                                        "cannot store cache in fd (%p) opened "
-                                        "on inode (gfid:%s)", fd,
-                                        uuid_utoa (fd->inode->gfid));
-                                goto unlock;
-                        }
-                }
-
-                sp_cache_ref (cache);
-        }
-unlock:
-        UNLOCK (&fd->lock);
-
-        if (cache != NULL) {
-                sp_cache_add_entries (cache, entries);
-                if (was_present) {
-                        sp_cache_unref (cache);
-                }
-        }
-
-out:
-        SP_STACK_UNWIND (readdir, frame, op_ret, op_errno, entries);
-        return 0;
-}
-
-
-int32_t
-sp_readdirp (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-             off_t off, dict_t *dict)
-{
-        sp_cache_t *cache    = NULL;
-        sp_local_t *local    = NULL;
-        char       *path     = NULL;
-        int32_t     ret      = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        cache = sp_get_cache_fd (this, fd);
-        if (cache) {
-                if (off != cache->expected_offset) {
-                        sp_cache_remove_entry (cache, NULL, 1);
-                }
-
-                sp_cache_unref (cache);
-        }
-
-        ret = inode_path (fd->inode, NULL, &path);
-        if (ret < 0) {
-                op_errno = -ret;
-                gf_log (this->name, GF_LOG_WARNING, "cannot construct path on "
-                        "which fd (%p) is opened (gfid = %s) (%s)", fd,
-                        uuid_utoa (fd->inode->gfid), strerror (op_errno));
-                goto unwind;
-        }
-
-        ret = sp_cache_remove_parent_entry (frame, this, fd->inode->table,
-                                            path);
-
-        if (ret < 0) {
-                op_errno = -ret;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache"
-                        " for path %s", path);
-                goto unwind;
-        }
-
-        GF_FREE (path);
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        if (local) {
-                local->fd = fd;
-                frame->local = local;
-        }
-
-        STACK_WIND (frame, sp_readdir_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readdirp, fd, size, off, dict);
-
-        return 0;
-
-unwind:
-        if (path != NULL) {
-                GF_FREE (path);
-        }
-
-        SP_STACK_UNWIND (readdir, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-int32_t
-sp_readdir (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-            off_t off)
-{
-        return sp_readdirp (frame, this, fd, size, off, NULL);
-}
-
-int32_t
-sp_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)
-{
-        GF_ASSERT (frame);
-
-        SP_STACK_UNWIND (truncate, frame, op_ret, op_errno, prebuf, postbuf);
-        return 0;
-}
-
-
-
-int32_t
-sp_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)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (rename, frame, op_ret, op_errno, buf, preoldparent,
-                         postoldparent, prenewparent, postnewparent);
-        return 0;
-}
-
-
-int32_t
-sp_fd_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
-           int32_t op_errno, fd_t *fd)
-{
-        sp_local_t  *local = NULL;
-        sp_fd_ctx_t *fd_ctx = NULL;
-
-        GF_ASSERT (frame);
-
-        if (op_ret == -1) {
-                goto out;
-        }
-
-        if (this == NULL) {
-                gf_log (frame->this ? frame->this->name : "stat-prefetch",
-                        GF_LOG_WARNING, "xlator object (this) is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        local = frame->local;
-        if (local == NULL) {
-                gf_log (this->name, GF_LOG_WARNING, "local is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        if (fd == NULL) {
-                gf_log (this->name, GF_LOG_WARNING, "fd is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        fd_ctx = sp_fd_ctx_new (this, local->loc.parent,
-                                (char *)local->loc.name, NULL);
-        if (fd_ctx == NULL) {
-                op_ret = -1;
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        op_ret = fd_ctx_set (fd, this, (long)(void *)fd_ctx);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot set stat-prefetch context in fd (%p) opened on "
-                        "inode (gfid:%s)", fd, uuid_utoa (fd->inode->gfid));
-                sp_fd_ctx_free (fd_ctx);
-                op_errno = ENOMEM;
-        }
-
-out:
-        SP_STACK_UNWIND (open, frame, op_ret, op_errno, fd);
-        return 0;
-}
-
-
-int32_t
-sp_open_helper (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-                fd_t *fd, int32_t wbflags)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, unwind);
-        GF_VALIDATE_OR_GOTO (frame->this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode "
-                        "(gfid:%s)", uuid_utoa (loc->inode->gfid));
-                op_errno = EINVAL;
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno,
-                                        EINVAL);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if ((op_ret == -1) && ((op_errno != ENOENT)
-                               || !((op_errno == ENOENT)
-                                    && (flags & O_CREAT)))) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding open call waiting on "
-                        "it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_fd_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->open, loc, flags, fd, wbflags);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (open, frame, -1, op_errno, fd);
-        return 0;
-}
-
-
-int32_t
-sp_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-         fd_t *fd, int wbflags)
-{
-        call_stub_t    *stub         = NULL;
-        sp_local_t     *local        = NULL;
-        int32_t         op_errno     = EINVAL, ret = -1;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING, "loc_copy failed (%s)",
-                        strerror (op_errno));
-                goto out;
-        }
-
-        stub = fop_open_stub (frame, sp_open_helper, loc, flags, fd, wbflags);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (open, frame, -1, op_errno, fd);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_fd_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->open, loc, flags, fd,
-                            wbflags);
-        }
-
-        return 0;
-
-}
-
-static int32_t
-sp_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)
-{
-        sp_local_t     *local              = NULL;
-        sp_fd_ctx_t    *fd_ctx             = NULL;
-        char            lookup_in_progress = 0, looked_up = 0;
-
-        GF_ASSERT (frame);
-
-        if (op_ret == -1) {
-                goto out;
-        }
-
-        if (this == NULL) {
-                gf_log (frame->this ? frame->this->name : "stat-prefetch",
-                        GF_LOG_WARNING, "xlator object (this) is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        local = frame->local;
-        if (local == NULL) {
-                gf_log (this->name, GF_LOG_WARNING, "local is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        looked_up = 1;
-        op_ret = sp_update_inode_ctx (this, local->loc.inode, &op_ret,
-                                      &op_errno, &lookup_in_progress,
-                                      &looked_up, buf, NULL, &op_errno);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "updating stat-prefetch context in inode "
-                        "(gfid:%s) (path: %s) failed (%s)",
-                        uuid_utoa (local->loc.inode->gfid), local->loc.path,
-                        strerror (op_errno));
-                goto out;
-        }
-
-        op_ret = sp_update_inode_ctx (this, local->loc.parent, NULL, NULL, NULL,
-                                      NULL, postparent, NULL, &op_errno);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "updating stat-prefetch context in parent inode failed "
-                        "for path (%s)(%s)", local->loc.path,
-                        strerror (op_errno));
-                goto out;
-        }
-
-        fd_ctx = sp_fd_ctx_new (this, local->loc.parent,
-                                (char *)local->loc.name, NULL);
-        if (fd_ctx == NULL) {
-                op_ret = -1;
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        op_ret = fd_ctx_set (fd, this, (long)(void *)fd_ctx);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot set stat-prefetch context in fd (%p) opened on "
-                        "inode (gfid:%s)", fd, uuid_utoa (fd->inode->gfid));
-                sp_fd_ctx_free (fd_ctx);
-                op_errno = ENOMEM;
-        }
-
-out:
-        SP_STACK_UNWIND (create, frame, op_ret, op_errno, fd, inode, buf,
-                         preparent, postparent);
-        return 0;
-}
-
-
-int32_t
-sp_create (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
-           mode_t mode, fd_t *fd, dict_t *params)
-{
-        sp_local_t        *local        = NULL;
-        int32_t            op_errno     = -1, ret = -1;
-        char               need_unwind  = 1;
-        sp_inode_ctx_t    *inode_ctx    = NULL;
-
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, loc, out, op_errno,
-                                        EINVAL);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, loc->path, out, op_errno,
-                                        EINVAL);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, loc->name, out, op_errno,
-                                        EINVAL);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, loc->inode, out,
-                                        op_errno, EINVAL);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->inode->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "loc_copy failed (%s)", strerror (op_errno));
-                goto out;
-        }
-
-        inode_ctx = sp_check_and_create_inode_ctx (this, loc->inode,
-                                                   SP_DONT_EXPECT);
-        if (inode_ctx == NULL) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot create stat-prefetch context in inode "
-                        "(gfid:%s)(%s)", uuid_utoa (loc->inode->gfid),
-                        strerror (op_errno));
-                goto out;
-        }
-
-        need_unwind = 0;
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (create, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL, NULL);
-        } else {
-                STACK_WIND (frame, sp_create_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->create, loc, flags,
-                            mode, fd, params);
-        }
-        return 0;
-}
-
-
-int32_t
-sp_opendir_helper (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode "
-                        "(gfid:%s)", uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding opendir call waiting "
-                        "on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_fd_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->opendir, loc, fd);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (opendir, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_opendir (call_frame_t *frame, xlator_t *this, loc_t *loc, fd_t *fd)
-{
-        sp_local_t     *local        = NULL;
-        call_stub_t    *stub         = NULL;
-        int32_t         op_errno     = EINVAL, ret = -1;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING, "loc_copy failed (%s)",
-                        strerror (op_errno));
-                goto out;
-        }
-
-        stub = fop_opendir_stub (frame, sp_opendir_helper, loc, fd);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (opendir, frame, -1, op_errno, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_fd_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->opendir, loc, fd);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_new_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)
-{
-        sp_local_t *local              = NULL;
-        char        lookup_in_progress = 0, looked_up = 0;
-
-        GF_ASSERT (frame);
-
-        if (op_ret == -1) {
-                goto out;
-        }
-
-        local = frame->local;
-        if (local == NULL) {
-                gf_log (frame->this->name, GF_LOG_WARNING, "local is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        if (this == NULL) {
-                gf_log (frame->this->name, GF_LOG_WARNING,
-                        "xlator object (this) is NULL");
-                op_ret = -1;
-                op_errno = EINVAL;
-                goto out;
-        }
-
-        looked_up = 1;
-        op_ret = sp_update_inode_ctx (this, local->loc.inode, &op_ret,
-                                      &op_errno, &lookup_in_progress,
-                                      &looked_up, buf, NULL, &op_errno);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "updating stat-prefetch context in inode "
-                        "(gfid:%s) (path: %s) failed (%s)",
-                        uuid_utoa (local->loc.inode->gfid), local->loc.path,
-                        strerror (op_errno));
-                goto out;
-        }
-
-        op_ret = sp_update_inode_ctx (this, local->loc.parent, NULL, NULL, NULL,
-                                      NULL, postparent, NULL, &op_errno);
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "updating stat-prefetch context in parent inode failed "
-                        "for path (%s)(%s)", local->loc.path,
-                        strerror (op_errno));
-        }
-
-out:
-        SP_STACK_UNWIND (mkdir, frame, op_ret, op_errno, inode, buf, preparent,
-                         postparent);
-        return 0;
-}
-
-
-int
-sp_mkdir (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-          dict_t *params)
-{
-        int32_t         ret          = -1, op_errno = EINVAL;
-        char            need_unwind  = 1;
-        sp_inode_ctx_t *inode_ctx    = NULL;
-        sp_local_t     *local        = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this->name, this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->path, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->inode->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", loc->path);
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING, "loc_copy failed (%s)",
-                        strerror (op_errno));
-                goto out;
-        }
-
-        inode_ctx = sp_check_and_create_inode_ctx (this, loc->inode,
-                                                   SP_DONT_EXPECT);
-        if (inode_ctx == NULL) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot create stat-prefetch context in inode "
-                        "(gfid:%s)(%s)", uuid_utoa (loc->inode->gfid),
-                        strerror (op_errno));
-                goto out;
-        }
-
-        need_unwind = 0;
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (mkdir, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL);
-        } else {
-                STACK_WIND (frame, sp_new_entry_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->mkdir, loc, mode, params);
-        }
-
-        return 0;
-}
-
-
-int
-sp_mknod (call_frame_t *frame, xlator_t *this, loc_t *loc, mode_t mode,
-          dev_t rdev, dict_t *params)
-{
-        int32_t         op_errno     = EINVAL, ret = -1;
-        char            need_unwind  = 1;
-        sp_inode_ctx_t *inode_ctx    = NULL;
-        sp_local_t     *local        = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->path, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->inode->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", loc->path);
-                goto out;
-        }
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING, "loc_copy failed (%s)",
-                        strerror (op_errno));
-                goto out;
-        }
-
-        inode_ctx = sp_check_and_create_inode_ctx (this, loc->inode,
-                                                   SP_DONT_EXPECT);
-        if (inode_ctx == NULL) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot create stat-prefetch context in inode "
-                        "(gfid:%s)(%s)", uuid_utoa (loc->inode->gfid),
-                        strerror (op_errno));
-                goto out;
-        }
-
-        need_unwind = 0;
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (mknod, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL);
-        } else {
-                STACK_WIND (frame, sp_new_entry_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->mknod, loc, mode,
-                            rdev, params);
-        }
-
-        return 0;
-}
-
-
-int
-sp_symlink (call_frame_t *frame, xlator_t *this, const char *linkpath,
-            loc_t *loc, dict_t *params)
-{
-        int32_t         ret          = -1, op_errno = EINVAL;
-        char            need_unwind  = 1;
-        sp_inode_ctx_t *inode_ctx    = NULL;
-        sp_local_t     *local        = NULL;
-
-        GF_ASSERT (frame);
-
-        GF_VALIDATE_OR_GOTO ((frame->this ? frame->this->name
-                              : "stat-prefetch"),
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->path, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->inode->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", loc->path);
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        local = GF_CALLOC (1, sizeof (*local), gf_sp_mt_sp_local_t);
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, out, op_errno,
-                                        ENOMEM);
-
-        frame->local = local;
-
-        ret = loc_copy (&local->loc, loc);
-        if (ret == -1) {
-                op_errno = errno;
-                gf_log (this->name, GF_LOG_WARNING, "loc_copy failed (%s)",
-                        strerror (op_errno));
-                goto out;
-        }
-
-        inode_ctx = sp_check_and_create_inode_ctx (this, loc->inode,
-                                                   SP_DONT_EXPECT);
-        if (inode_ctx == NULL) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "%s: cannot create stat-prefetch context (gfid:%s)(%s)",
-                        loc->path, loc->inode->gfid, strerror (op_errno));
-                goto out;
-        }
-
-        need_unwind = 0;
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (symlink, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL);
-        } else {
-                STACK_WIND (frame, sp_new_entry_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->symlink, linkpath, loc,
-                            params);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_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)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (link, frame, op_ret, op_errno, inode, buf, preparent,
-                         postparent);
-        return 0;
-}
-
-
-int32_t
-sp_link_helper (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
-                loc_t *newloc)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, newloc, unwind);
-
-        ret = inode_ctx_get (oldloc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (oldloc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno,
-                                        EINVAL);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding link call waiting on "
-                        "it", oldloc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_link_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->link, oldloc, newloc);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_link (call_frame_t *frame, xlator_t *this, loc_t *oldloc, loc_t *newloc)
-{
-        call_stub_t *stub         = NULL;
-        int32_t      ret          = 0, op_errno = EINVAL;
-        char         can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, newloc, out);
-        GF_VALIDATE_OR_GOTO (this->name, newloc->path, out);
-        if (uuid_is_null (newloc->gfid))
-            GF_VALIDATE_OR_GOTO (this->name, newloc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, newloc->inode, out);
-        if (uuid_is_null (oldloc->gfid))
-                GF_VALIDATE_OR_GOTO (this->name, oldloc->name, out);
-
-        ret = sp_cache_remove_parent_entry (frame, this, newloc->parent->table,
-                                            (char *)newloc->path);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", newloc->path);
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_remove_caches_from_all_fds_opened (this, oldloc->parent,
-                                              (char *)oldloc->name);
-
-        stub = fop_link_stub (frame, sp_link_helper, oldloc, newloc);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, oldloc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (link, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, oldloc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_link_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->link, oldloc, newloc);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_truncate_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                    off_t offset)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno,
-                                        EINVAL);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding truncate call "
-                        "waiting on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_truncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->truncate, loc, offset);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (truncate, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_truncate (call_frame_t *frame, xlator_t *this, loc_t *loc, off_t offset)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        if (uuid_is_null (loc->gfid))
-                GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_truncate_stub (frame, sp_truncate_helper, loc, offset);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (truncate, frame, -1, op_errno, NULL, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_truncate_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->truncate, loc, offset);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_ftruncate (call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0, op_errno = EINVAL;
-        inode_t     *parent = NULL;
-        char        *name   = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        ret = fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "stat-prefetch context not "
-                        "set in fd (%p) opened on inode (gfid:%s)", fd,
-                        uuid_utoa (fd->inode->gfid));
-                goto unwind;
-        }
-
-        fd_ctx = (void *)(long)value;
-        name   = fd_ctx->name;
-        parent = fd_ctx->parent_inode;
-
-        sp_remove_caches_from_all_fds_opened (this, parent, (char *)name);
-
-        STACK_WIND (frame, sp_truncate_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->ftruncate, fd, offset);
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (ftruncate, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno,
-                struct iatt *prestat, struct iatt *poststat)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (setattr, frame, op_ret, op_errno, prestat, poststat);
-        return 0;
-}
-
-
-int
-sp_setattr_helper (call_frame_t *frame, xlator_t *this,
-                   loc_t *loc, struct iatt *buf, int32_t valid)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                op_errno = EINVAL;
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding setattr call "
-                        "waiting on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_setattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->setattr, loc, buf, valid);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (setattr, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int
-sp_setattr (call_frame_t *frame, xlator_t *this,
-            loc_t *loc, struct iatt *buf, int32_t valid)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        if (uuid_is_null (loc->gfid))
-            GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_setattr_stub (frame, sp_setattr_helper, loc, buf, valid);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (setattr, frame, -1, op_errno, NULL, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_setattr_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->setattr, loc, buf, valid);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_readlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, const char *path,
-                 struct iatt *buf)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (readlink, frame, op_ret, op_errno, path, buf);
-        return 0;
-}
-
-
-int32_t
-sp_readlink_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                    size_t size)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding readlink call "
-                        "waiting on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_readlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readlink, loc, size);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (readlink, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_readlink (call_frame_t *frame, xlator_t *this, loc_t *loc, size_t size)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        if (uuid_is_null (loc->gfid))
-                GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_readlink_stub (frame, sp_readlink_helper, loc, size);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (readlink, frame, -1, op_errno, NULL, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_readlink_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->readlink, loc, size);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_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)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (unlink, frame, op_ret, op_errno, preparent,
-                         postparent);
-        return 0;
-}
-
-
-
-int32_t
-sp_err_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-            int32_t op_ret, int32_t op_errno)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (setxattr, frame, op_ret, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_unlink_helper (call_frame_t *frame, xlator_t *this, loc_t *loc)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding unlink call "
-                        "waiting on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->unlink, loc);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (unlink, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_unlink (call_frame_t *frame, xlator_t *this, loc_t *loc)
-{
-        int32_t         ret          = -1, op_errno = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->parent->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", loc->path);
-                goto out;
-        }
-
-        stub = fop_unlink_stub (frame, sp_unlink_helper, loc);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (unlink, frame, -1, op_errno, NULL, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->unlink, loc);
-        }
-
-        return 0;
-}
-
-
-int
-sp_rmdir_helper (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "lookup-behind has failed "
-                        "for path (%s)(%s), unwinding rmdir call "
-                        "waiting on it", loc->path, strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->rmdir, loc, flags);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (rmdir, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int
-sp_rmdir (call_frame_t *frame, xlator_t *this, loc_t *loc, int flags)
-{
-        int32_t         ret          = -1, op_errno = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->path, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->inode, NULL);
-
-        ret = sp_cache_remove_parent_entry (frame, this, loc->inode->table,
-                                            (char *)loc->path);
-        if (ret == -1) {
-                op_errno = ENOMEM;
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", loc->path);
-                goto out;
-        }
-
-        stub = fop_rmdir_stub (frame, sp_rmdir_helper, loc, flags);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (rmdir, frame, -1, op_errno, NULL, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->rmdir, loc, flags);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_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)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (readv, frame, op_ret, op_errno, vector, count, stbuf,
-                         iobref);
-        return 0;
-}
-
-
-int32_t
-sp_readv (call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
-          off_t offset, uint32_t flags)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0, op_errno = EINVAL;
-        inode_t     *parent = NULL;
-        char        *name   = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        ret = fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "stat-prefetch context not "
-                        "set in fd (%p) opened on inode (gfid:%s)", fd,
-                        uuid_utoa (fd->inode->gfid));
-                goto unwind;
-        }
-
-        fd_ctx = (void *)(long)value;
-        name   = fd_ctx->name;
-        parent = fd_ctx->parent_inode;
-
-        sp_remove_caches_from_all_fds_opened (this, parent, (char *)name);
-
-        STACK_WIND (frame, sp_readv_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->readv, fd, size, offset, flags);
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (readv, frame, -1, op_errno, NULL, -1, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *vector,
-           int32_t count, off_t off, uint32_t flags, struct iobref *iobref)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0, op_errno = EINVAL;
-        inode_t     *parent = NULL;
-        char        *name   = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        ret = fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "stat-prefetch context not "
-                        "set in fd (%p) opened on inode (gfid:%s)", fd,
-                        uuid_utoa (fd->inode->gfid));
-                goto unwind;
-        }
-
-        fd_ctx = (void *)(long)value;
-        name   = fd_ctx->name;
-        parent = fd_ctx->parent_inode;
-
-        sp_remove_caches_from_all_fds_opened (this, parent, (char *)name);
-
-        STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->writev, fd, vector, count, off,
-                    flags, iobref);
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (writev, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t flags)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0, op_errno = EINVAL;
-        inode_t     *parent = NULL;
-        char        *name   = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        ret = fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "stat-prefetch context not "
-                        "set in fd (%p) opened on inode (gfid:%s)", fd,
-                        uuid_utoa (fd->inode->gfid));
-                goto unwind;
-        }
-
-        fd_ctx = (void *)(long)value;
-        name   = fd_ctx->name;
-        parent = fd_ctx->parent_inode;
-
-        sp_remove_caches_from_all_fds_opened (this, parent, (char *)name);
-
-        STACK_WIND (frame, sp_unlink_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fsync, fd, flags);
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (fsync, frame, -1, op_errno, NULL, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_rename_helper (call_frame_t *frame, xlator_t *this, loc_t *oldloc,
-                  loc_t *newloc)
-{
-        uint64_t        value               = 0;
-        char            need_unwind         = 0;
-        char            can_wind            = 0;
-        int32_t         ret                 = 0, op_errno = EINVAL;
-        int32_t         old_op_ret          = -1, old_op_errno = -1;
-        int32_t         new_op_ret          = -1, new_op_errno = -1;
-        char            old_inode_looked_up = 0, new_inode_looked_up = 0;
-        sp_inode_ctx_t *old_inode_ctx       = NULL, *new_inode_ctx = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, newloc, unwind);
-
-        ret = inode_ctx_get (oldloc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (oldloc->inode->gfid));
-                goto unwind;
-        }
-
-        old_inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, old_inode_ctx, unwind);
-
-        LOCK (&old_inode_ctx->lock);
-        {
-                old_inode_looked_up = old_inode_ctx->looked_up;
-                old_op_ret = old_inode_ctx->op_ret;
-                old_op_errno = old_inode_ctx->op_errno;
-                need_unwind = old_inode_ctx->need_unwind;
-        }
-        UNLOCK (&old_inode_ctx->lock);
-
-        if (need_unwind) {
-                /* there was an error while queuing up lookup stub for newloc */
-                gf_log (this->name, GF_LOG_WARNING,
-                        "could not queue lookup stub for path (%s)",
-                        newloc->path);
-                goto unwind;
-        }
-
-        if (newloc->inode != NULL) {
-                ret = inode_ctx_get (newloc->inode, this, &value);
-                if (ret == 0) {
-                        new_inode_ctx = (sp_inode_ctx_t *)(long)value;
-                        if (new_inode_ctx != NULL) {
-                                LOCK (&new_inode_ctx->lock);
-                                {
-                                        new_inode_looked_up
-                                                = new_inode_ctx->looked_up;
-                                        new_op_ret = new_inode_ctx->op_ret;
-                                        new_op_errno = new_inode_ctx->op_errno;
-                                }
-                                UNLOCK (&new_inode_ctx->lock);
-                        }
-                }
-        }
-
-        if (new_inode_ctx == NULL) {
-                if (old_op_ret == -1) {
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "lookup-behind has failed "
-                                "for path (%s)(%s), unwinding rename call "
-                                "waiting on it", oldloc->path,
-                                strerror (old_op_errno));
-
-                        op_errno = old_op_errno;
-                        goto unwind;
-                } else {
-                        can_wind = 1;
-                }
-        } else {
-                if (new_inode_looked_up && old_inode_looked_up) {
-                        if ((old_op_ret == -1)
-                            || ((new_op_ret == -1)
-                                && (new_op_errno != ENOENT))) {
-                                if (old_op_ret == -1) {
-                                        gf_log (this->name, GF_LOG_WARNING,
-                                                "lookup-behind has failed "
-                                                "for path (%s)(%s), unwinding "
-                                                "rename call waiting on it",
-                                                oldloc->path,
-                                                strerror (old_op_errno));
-                                        op_errno = old_op_errno;
-                                } else {
-                                        gf_log (this->name, GF_LOG_WARNING,
-                                                "lookup-behind has failed "
-                                                "for path (%s)(%s), unwinding "
-                                                "rename call waiting on it",
-                                                newloc->path,
-                                                strerror (new_op_errno));
-                                        op_errno = new_op_errno;
-                                }
-
-                                goto unwind;
-                        } else {
-                                can_wind = 1;
-                        }
-                }
-        }
-
-        if (can_wind) {
-                STACK_WIND (frame, sp_rename_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->rename, oldloc, newloc);
-        }
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (rename, frame, -1, op_errno, NULL, NULL, NULL, NULL,
-                         NULL);
-        return 0;
-}
-
-
-int32_t
-sp_rename (call_frame_t *frame, xlator_t *this, loc_t *oldloc,loc_t *newloc)
-{
-        char            need_unwind           = 1;
-        uint64_t        value                 = 0;
-        call_stub_t    *stub                  = NULL;
-        sp_inode_ctx_t *inode_ctx             = NULL;
-        int32_t         ret                   = -1, op_errno = EINVAL;
-        char            old_inode_can_wind    = 0, new_inode_can_wind = 0;
-        char            old_inode_need_lookup = 0, new_inode_need_lookup = 0;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (frame->this ? frame->this->name : "stat-prefetch",
-                             this, out);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc, out);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc->path, out);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc->name, out);
-        GF_VALIDATE_OR_GOTO (this->name, oldloc->inode, out);
-
-        GF_VALIDATE_OR_GOTO (this->name, newloc, out);
-        GF_VALIDATE_OR_GOTO (this->name, newloc->path, out);
-
-        sp_remove_caches_from_all_fds_opened (this, oldloc->parent,
-                                              (char *)oldloc->name);
-
-        sp_remove_caches_from_all_fds_opened (this, newloc->parent,
-                                              (char *)newloc->name);
-
-        ret = sp_cache_remove_parent_entry (frame, this, oldloc->parent->table,
-                                            (char *)oldloc->path);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", oldloc->path);
-                goto out;
-        }
-
-        ret = sp_cache_remove_parent_entry (frame, this, newloc->parent->table,
-                                            (char *)newloc->path);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "cannot remove parent entry from grand-parent's cache "
-                        "for path (%s)", newloc->path);
-                goto out;
-        }
-
-        if (IA_ISDIR (oldloc->inode->ia_type)) {
-                sp_remove_caches_from_all_fds_opened (this, oldloc->inode,
-                                                      NULL);
-        }
-
-        stub = fop_rename_stub (frame, sp_rename_helper, oldloc, newloc);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        ret = sp_process_inode_ctx (frame, this, oldloc, stub, &need_unwind,
-                                    &old_inode_need_lookup, &old_inode_can_wind,
-                                    &op_errno);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "processing stat-prefetch "
-                        "context in inode (gfid:%s) (path:%s) failed (%s)",
-                        uuid_utoa (oldloc->inode->gfid), oldloc->path,
-                        strerror (op_errno));
-                goto out;
-        }
-
-        if (newloc->inode != NULL) {
-                stub = fop_rename_stub (frame, sp_rename_helper, oldloc,
-                                        newloc);
-                if (stub == NULL) {
-                        op_errno = ENOMEM;
-                        goto out;
-                }
-
-                ret = sp_process_inode_ctx (frame, this, newloc, stub,
-                                            &need_unwind,
-                                            &new_inode_need_lookup,
-                                            &new_inode_can_wind, &op_errno);
-                if (ret == -1) {
-                        ret = inode_ctx_get (oldloc->inode, this, &value);
-
-                        inode_ctx = (sp_inode_ctx_t *)(long)value;
-                        if (inode_ctx == NULL) {
-                                gf_log (this->name, GF_LOG_WARNING,
-                                        "stat-prefetch context not set in inode"
-                                        " (gfid:%s) (path:%s)",
-                                        uuid_utoa (oldloc->inode->gfid),
-                                        oldloc->path);
-                                goto out;
-                        }
-
-                        LOCK (&inode_ctx->lock);
-                        {
-                                if (!inode_ctx->looked_up) {
-                                        /* unwind in sp_rename_helper */
-                                        need_unwind = 0;
-                                        inode_ctx->need_unwind = 1;
-                                }
-                        }
-                        UNLOCK (&inode_ctx->lock);
-                }
-
-        } else {
-                new_inode_can_wind = 1;
-        }
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (rename, frame, -1, op_errno, NULL, NULL, NULL,
-                                 NULL, NULL);
-        } else if (old_inode_need_lookup || new_inode_need_lookup) {
-                if (old_inode_need_lookup) {
-                        STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                                    FIRST_CHILD(this)->fops->lookup, oldloc,
-                                    NULL);
-                }
-
-                if (new_inode_need_lookup) {
-                        STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                                    FIRST_CHILD(this)->fops->lookup, newloc,
-                                    NULL);
-                }
-        } else if (old_inode_can_wind && new_inode_can_wind) {
-                STACK_WIND (frame, sp_rename_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->rename, oldloc, newloc);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_setxattr_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                    dict_t *dict, int32_t flags)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding setxattr call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->setxattr, loc, dict,
-                    flags);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (setxattr, frame, -1, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_setxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
-             int32_t flags)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_setxattr_stub (frame, sp_setxattr_helper, loc, dict, flags);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (setxattr, frame, -1, op_errno);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->setxattr, loc, dict,
-                            flags);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_removexattr_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                       const char *name)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding setxattr call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->removexattr, loc, name);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (removexattr, frame, -1, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_removexattr (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                const char *name)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_removexattr_stub (frame, sp_removexattr_helper, loc, name);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (removexattr, frame, -1, op_errno);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->removexattr, loc, name);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_getxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                 int32_t op_ret, int32_t op_errno, dict_t *dict)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (getxattr, frame, op_ret, op_errno, dict);
-        return 0;
-}
-
-
-int32_t
-sp_getxattr_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                    const char *name)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding getxattr call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_getxattr_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->getxattr, loc, name);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (getxattr, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_getxattr (call_frame_t *frame, xlator_t *this, loc_t *loc, const char *name)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        stub = fop_getxattr_stub (frame, sp_getxattr_helper, loc, name);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (getxattr, frame, -1, op_errno, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_getxattr_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->getxattr, loc, name);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_xattrop_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
-                int32_t op_ret, int32_t op_errno, dict_t *dict)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (xattrop, frame, op_ret, op_errno, dict);
-        return 0;
-}
-
-
-int32_t
-sp_xattrop_helper (call_frame_t *frame, xlator_t *this, loc_t *loc,
-                   gf_xattrop_flags_t flags, dict_t *dict)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding xattrop call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_xattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->xattrop, loc, flags, dict);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (xattrop, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
-            gf_xattrop_flags_t flags, dict_t *dict)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->name, out);
-
-        sp_remove_caches_from_all_fds_opened (this, loc->parent,
-                                              (char *)loc->name);
-
-        stub = fop_xattrop_stub (frame, sp_xattrop_helper, loc, flags, dict);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (xattrop, frame, -1, op_errno, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_xattrop_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->xattrop, loc, flags, dict);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_fxattrop (call_frame_t *frame, xlator_t *this, fd_t *fd,
-             gf_xattrop_flags_t flags, dict_t *dict)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0, op_errno = EINVAL;
-        inode_t     *parent = NULL;
-        char        *name   = NULL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, fd, unwind);
-
-        ret = fd_ctx_get (fd, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING, "stat-prefetch context not "
-                        "set in fd (%p) opened on inode (gfid:%s", fd,
-                        uuid_utoa (fd->inode->gfid));
-                goto unwind;
-        }
-
-        fd_ctx = (void *)(long)value;
-        name   = fd_ctx->name;
-        parent = fd_ctx->parent_inode;
-
-        sp_remove_caches_from_all_fds_opened (this, parent, name);
-
-        STACK_WIND (frame, sp_xattrop_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->fxattrop, fd, flags, dict);
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (xattrop, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-int32_t
-sp_stbuf_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret,
-              int32_t op_errno, struct iatt *buf)
-{
-        GF_ASSERT (frame);
-        SP_STACK_UNWIND (stat, frame, op_ret, op_errno, buf);
-        return 0;
-}
-
-
-int32_t
-sp_stat_helper (call_frame_t *frame, xlator_t *this, loc_t *loc)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding stat call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_stbuf_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->stat, loc);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (stat, frame, -1, op_errno, NULL);
-        return 0;
-}
-
-
-int32_t
-sp_stat (call_frame_t *frame, xlator_t *this, loc_t *loc)
-{
-        int32_t         op_errno     = -1;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        stub = fop_stat_stub (frame, sp_stat_helper, loc);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (stat, frame, -1, op_errno, NULL);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_stbuf_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->stat, loc);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_access_helper (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding access call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->access, loc, mask);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (access, frame, -1, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_access (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t mask)
-{
-        int32_t         op_errno     = -1;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        stub = fop_access_stub (frame, sp_access_helper, loc, mask);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (access, frame, -1, op_errno);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->access, loc, mask);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_inodelk_helper (call_frame_t *frame, xlator_t *this, const char *volume,
-                   loc_t *loc, int32_t cmd, struct gf_flock *lock)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding inodelk call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->inodelk, volume, loc, cmd, lock);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (inodelk, frame, -1, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_inodelk (call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc,
-            int32_t cmd, struct gf_flock *lock)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        stub = fop_inodelk_stub (frame, sp_inodelk_helper, volume, loc, cmd,
-                                 lock);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (inodelk, frame, -1, op_errno);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->inodelk, volume, loc, cmd,
-                            lock);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_entrylk_helper (call_frame_t *frame, xlator_t *this, const char *volume,
-                   loc_t *loc, const char *basename, entrylk_cmd cmd,
-                   entrylk_type type)
-{
-        uint64_t        value     = 0;
-        sp_inode_ctx_t *inode_ctx = NULL;
-        int32_t         ret       = 0, op_ret = -1, op_errno = EINVAL;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, unwind);
-        GF_VALIDATE_OR_GOTO (this->name, loc, unwind);
-
-        ret = inode_ctx_get (loc->inode, this, &value);
-        if (ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "stat-prefetch context not set in inode (gfid:%s)",
-                        uuid_utoa (loc->inode->gfid));
-                goto unwind;
-        }
-
-        inode_ctx = (sp_inode_ctx_t *)(long) value;
-        GF_VALIDATE_OR_GOTO (this->name, inode_ctx, unwind);
-
-        LOCK (&inode_ctx->lock);
-        {
-                op_ret = inode_ctx->op_ret;
-                op_errno = inode_ctx->op_errno;
-        }
-        UNLOCK (&inode_ctx->lock);
-
-        if (op_ret == -1) {
-                gf_log (this->name, GF_LOG_WARNING,
-                        "lookup-behind has failed for path (%s)(%s), "
-                        "unwinding entrylk call waiting on it", loc->path,
-                        strerror (op_errno));
-                goto unwind;
-        }
-
-        STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                    FIRST_CHILD(this)->fops->entrylk, volume, loc, basename,
-                    cmd, type);
-
-        return 0;
-
-unwind:
-        SP_STACK_UNWIND (entrylk, frame, -1, op_errno);
-        return 0;
-}
-
-
-int32_t
-sp_entrylk (call_frame_t *frame, xlator_t *this, const char *volume, loc_t *loc,
-            const char *basename, entrylk_cmd cmd, entrylk_type type)
-{
-        int32_t         op_errno     = EINVAL;
-        call_stub_t    *stub         = NULL;
-        char            can_wind     = 0, need_lookup = 0, need_unwind = 1;
-
-        GF_ASSERT (frame);
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc, out);
-        GF_VALIDATE_OR_GOTO (this->name, loc->inode, out);
-
-        stub = fop_entrylk_stub (frame, sp_entrylk_helper, volume, loc,
-                                 basename, cmd, type);
-        if (stub == NULL) {
-                op_errno = ENOMEM;
-                goto out;
-        }
-
-        sp_process_inode_ctx (frame, this, loc, stub, &need_unwind,
-                              &need_lookup, &can_wind, &op_errno);
-
-out:
-        if (need_unwind) {
-                SP_STACK_UNWIND (entrylk, frame, -1, op_errno);
-        } else if (need_lookup) {
-                STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->lookup, loc, NULL);
-        } else if (can_wind) {
-                STACK_WIND (frame, sp_err_cbk, FIRST_CHILD(this),
-                            FIRST_CHILD(this)->fops->entrylk, volume, loc,
-                            basename, cmd, type);
-        }
-
-        return 0;
-}
-
-
-int32_t
-sp_forget (xlator_t *this, inode_t *inode)
-{
-        struct iatt *buf   = NULL;
-        uint64_t     value = 0;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, inode, out);
-
-        inode_ctx_del (inode, this, &value);
-
-        if (value) {
-                buf = (void *)(long)value;
-                GF_FREE (buf);
-        }
-
-out:
-        return 0;
-}
-
-
-int32_t
-sp_release (xlator_t *this, fd_t *fd)
-{
-        sp_fd_ctx_t *fd_ctx = NULL;
-        uint64_t     value  = 0;
-        int32_t      ret    = 0;
-        sp_cache_t  *cache  = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, fd, out);
-        ret = fd_ctx_del (fd, this, &value);
-        if (!ret) {
-                fd_ctx = (void *)(long) value;
-                cache = fd_ctx->cache;
-                if (cache) {
-                        gf_log (this->name, GF_LOG_TRACE, "cache hits: %lu, "
-                                "cache miss: %lu", cache->hits, cache->miss);
-                }
-
-                sp_fd_ctx_free (fd_ctx);
-        }
-
-out:
-        return 0;
-}
-
-
-struct sp_cache_dump {
-        int i;
-        char *key_prefix;
-};
-typedef struct sp_cache_dump sp_cache_dump_t;
-
-void
-sp_cache_traverse (void *data, void *mydata)
-{
-        gf_dirent_t     *dirent                   = NULL;
-        char             key[GF_DUMP_MAX_BUF_LEN] = {0, };
-        char             uuidbuf[256]             = {0, };
-        sp_cache_dump_t *dump                     = NULL;
-
-        if ((data == NULL) || (mydata == NULL)) {
-                goto out;
-        }
-
-        dirent = data;
-        dump = mydata;
-
-        gf_proc_dump_build_key (key, dump->key_prefix, "entry[%d].name",
-                                dump->i);
-        gf_proc_dump_write (key, "%s", dirent->d_name);
-
-        uuid_unparse (dirent->d_stat.ia_gfid, uuidbuf);
-        gf_proc_dump_build_key (key, dump->key_prefix, "entry[%d].inode.gfid",
-                                dump->i);
-        gf_proc_dump_write (key, "%s", uuidbuf);
-
-        dump->i++;
-out:
-        return;
-}
-
-
-int32_t
-sp_fdctx_dump (xlator_t *this, fd_t *fd)
-{
-        char            key[GF_DUMP_MAX_BUF_LEN]        = {0, };
-        char            key_prefix[GF_DUMP_MAX_BUF_LEN] = {0, };
-        char            uuidbuf[256]                    = {0, };
-        sp_cache_t     *cache                           = NULL;
-        int32_t         ret                             = -1;
-        sp_cache_dump_t *dump                           = NULL;
-        char            *parent                         = NULL;
-
-        cache = sp_get_cache_fd (this, fd);
-        if (cache == NULL) {
-                ret = 0;
-                goto out;
-        }
-
-        dump = GF_CALLOC(1, sizeof (*dump), gf_common_mt_char);
-        if (dump == NULL) {
-                goto out;
-        }
-
-        gf_proc_dump_build_key (key_prefix,
-                                "xlator.performance.stat-prefetch",
-                                "fdctx");
-        gf_proc_dump_add_section (key_prefix);
-
-        gf_proc_dump_build_key (key, key_prefix, "fd");
-        gf_proc_dump_write (key, "%p", fd);
-
-        ret = __inode_path (fd->inode, NULL, &parent);
-        if (parent != NULL) {
-                gf_proc_dump_build_key (key, key_prefix, "name");
-                gf_proc_dump_write (key, "%s", parent);
-                GF_FREE (parent);
-        }
-
-        uuid_unparse (fd->inode->gfid, uuidbuf);
-        gf_proc_dump_build_key (key, key_prefix, "fd.inode.gfid");
-        gf_proc_dump_write (key, "%s", uuidbuf);
-
-        gf_proc_dump_build_key (key, key_prefix, "miss");
-        gf_proc_dump_write (key, "%lu", cache->miss);
-
-        gf_proc_dump_build_key (key, key_prefix, "hits");
-        gf_proc_dump_write (key, "%lu", cache->hits);
-
-        gf_proc_dump_build_key (key, key_prefix, "cache");
-        dump->key_prefix = key;
-
-        rbthash_table_traverse (cache->table, sp_cache_traverse, dump);
-
-        GF_FREE (dump);
-        ret = 0;
-out:
-        return ret;
-}
-
-int32_t
-sp_inodectx_dump (xlator_t *this, inode_t *inode)
-{
-        char            key[GF_DUMP_MAX_BUF_LEN]        = {0, };
-        char            key_prefix[GF_DUMP_MAX_BUF_LEN] = {0, };
-        sp_inode_ctx_t *inode_ctx                       = NULL;
-        call_stub_t    *stub                            = NULL;
-        uint64_t        value                           = 0;
-        int32_t         ret                             = -1, i = 0;
-
-        if ((this == NULL) || (inode == NULL)) {
-                goto out;
-        }
-
-        ret = inode_ctx_get (inode, this, &value);
-        if (ret == 0) {
-                inode_ctx = (sp_inode_ctx_t *)(long)value;
-        }
-
-        if (inode_ctx == NULL) {
-                goto out;
-        }
-
-        gf_proc_dump_build_key (key_prefix,
-                                "stat-prefetch",
-                                "inodectx");
-        gf_proc_dump_add_section (key_prefix);
-
-        LOCK (&inode_ctx->lock);
-        {
-                gf_proc_dump_write ("looked_up", "%s",
-                                    inode_ctx->looked_up ? "yes" : "no");
-
-                gf_proc_dump_write ("lookup_in_progress", "%s",
-                                    inode_ctx->lookup_in_progress ?
-                                    "yes" : "no");
-
-                gf_proc_dump_write ("need_unwind", "%s", inode_ctx->need_unwind ?
-                                    "yes" : "no");
-
-                gf_proc_dump_write ("op_ret", "%d", inode_ctx->op_ret);
-
-                gf_proc_dump_write ("op_errno", "%d", inode_ctx->op_errno);
-
-                list_for_each_entry (stub, &inode_ctx->waiting_ops, list) {
-                        gf_proc_dump_build_key (key, "",
-                                                "waiting-ops[%d].frame", i);
-                        gf_proc_dump_write (key, "%"PRId64,
-                                            stub->frame->root->unique);
-
-                        gf_proc_dump_build_key (key, "",
-                                                "waiting-ops[%d].fop", i);
-                        gf_proc_dump_write (key, "%s", gf_fop_list[stub->fop]);
-
-                        i++;
-                }
-        }
-        UNLOCK (&inode_ctx->lock);
-out:
-        return ret;
-}
-
-int
-sp_priv_dump (xlator_t *this)
-{
-        sp_private_t            *priv         = NULL;
-        uint32_t                total_entries = 0;
-        uint32_t                ret           = -1;
-        char                    key[GF_DUMP_MAX_BUF_LEN];
-        char                    key_prefix[GF_DUMP_MAX_BUF_LEN];
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-        GF_VALIDATE_OR_GOTO (this->name, this->private, out);
-
-        priv = this->private;
-
-        total_entries = priv->entries;
-
-        gf_proc_dump_build_key (key_prefix, "xlator.performance.stat-prefetch",
-                                "priv");
-        gf_proc_dump_add_section (key_prefix);
-
-        gf_proc_dump_build_key (key, key_prefix, "max_allowed_entries");
-        gf_proc_dump_write (key, "%lu", GF_SP_CACHE_ENTRIES_EXPECTED);
-        gf_proc_dump_build_key (key, key_prefix, "num_entries_cached");
-        gf_proc_dump_write (key, "%lu",(unsigned long)total_entries);
-        ret = 0;
-
-out:
-        return ret;
-}
-
-
-int32_t
-mem_acct_init (xlator_t *this)
-{
-        int     ret = -1;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-
-        ret = xlator_mem_acct_init (this, gf_sp_mt_end + 1);
-
-        if (ret != 0) {
-                gf_log (this->name, GF_LOG_ERROR, "Memory accounting init"
-                        "failed");
-                goto out;
-        }
-
-out:
-        return ret;
-}
-
-
-int32_t
-init (xlator_t *this)
-{
-        int32_t         ret  = -1;
-        sp_private_t   *priv = NULL;
-
-        GF_VALIDATE_OR_GOTO ("stat-prefetch", this, out);
-
-        if (!this->children || this->children->next) {
-                gf_log ("stat-prefetch",
-                        GF_LOG_ERROR,
-                        "FATAL: translator %s does not have exactly one child "
-                        "node", this->name);
-                goto out;
-        }
-
-        priv = GF_CALLOC (1, sizeof(sp_private_t), gf_sp_mt_sp_private_t);
-        LOCK_INIT (&priv->lock);
-
-        this->private = priv;
-
-        ret = 0;
-out:
-        return ret;
-}
-
-void
-fini (xlator_t *this)
-{
-        sp_private_t  *priv = NULL;
-
-        if (!this)
-                goto out;
-        else {
-                priv = this->private;
-                if (priv) {
-                        if (priv->mem_pool)
-                                mem_pool_destroy (priv->mem_pool);
-                        LOCK_DESTROY (&priv->lock);
-                        GF_FREE (priv);
-                        this->private = NULL;
-                }
-        }
-out:
-        return;
-}
-
-
-struct xlator_fops fops = {
-        .lookup      = sp_lookup,
-        .readdir     = sp_readdir,
-        .readdirp    = sp_readdirp,
-        .open        = sp_open,
-        .create      = sp_create,
-        .opendir     = sp_opendir,
-        .mkdir       = sp_mkdir,
-        .mknod       = sp_mknod,
-        .symlink     = sp_symlink,
-        .link        = sp_link,
-        .truncate    = sp_truncate,
-        .ftruncate   = sp_ftruncate,
-        .readlink    = sp_readlink,
-        .unlink      = sp_unlink,
-        .rmdir       = sp_rmdir,
-        .readv       = sp_readv,
-        .writev      = sp_writev,
-        .fsync       = sp_fsync,
-        .rename      = sp_rename,
-        .setxattr    = sp_setxattr,
-        .removexattr = sp_removexattr,
-        .xattrop     = sp_xattrop,
-        .fxattrop    = sp_fxattrop,
-        .setattr     = sp_setattr,
-        .stat        = sp_stat,
-        .access      = sp_access,
-        .getxattr    = sp_getxattr,
-        .inodelk     = sp_inodelk,
-        .entrylk     = sp_entrylk,
-};
-
-struct xlator_cbks cbks = {
-        .forget     = sp_forget,
-        .release    = sp_release,
-        .releasedir = sp_release
-};
-
-struct xlator_dumpops dumpops = {
-        .priv = sp_priv_dump,
-        .inodectx = sp_inodectx_dump,
-        .fdctx = sp_fdctx_dump
-};
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.h b/xlators/performance/stat-prefetch/src/stat-prefetch.h
deleted file mode 100644
index ed84719e407..00000000000
--- a/xlators/performance/stat-prefetch/src/stat-prefetch.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
-  Copyright (c) 2009-2011 Gluster, Inc. <http://www.gluster.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 _STAT_PREFETCH_H
-#define _STAT_PREFETCH_H
-
-#ifndef _CONFIG_H
-#define _CONFIG_H
-#include "config.h"
-#endif
-
-#include "locking.h"
-#include "inode.h"
-#include "glusterfs.h"
-#include "dict.h"
-#include "xlator.h"
-#include "rbthash.h"
-#include "hashfn.h"
-#include "call-stub.h"
-#include "stat-prefetch-mem-types.h"
-#include <libgen.h>
-
-struct sp_cache {
-        rbthash_table_t *table;
-        xlator_t        *this;
-        uint64_t         expected_offset;    /* Offset where the next read will
-                                              * happen.
-                                              */
-        gf_lock_t        lock;
-        unsigned long    miss;
-        unsigned long    hits;
-        uint32_t         ref;
-};
-typedef struct sp_cache sp_cache_t;
-
-struct sp_fd_ctx {
-        sp_cache_t *cache;
-        inode_t    *parent_inode;       /*
-                                         * inode corresponding to dirname (path)
-                                         */
-        char       *name;               /*
-                                         * basename of path on which this fd is
-                                         * opened
-                                         */
-};
-typedef struct sp_fd_ctx sp_fd_ctx_t;
-
-struct sp_local {
-        loc_t  loc;
-        fd_t  *fd;
-        char   is_lookup;
-};
-typedef struct sp_local sp_local_t;
-
-struct sp_inode_ctx {
-        char             looked_up;
-        char             lookup_in_progress;
-        char             need_unwind;
-        int32_t          op_ret;
-        int32_t          op_errno;
-        struct iatt      stbuf;
-        gf_lock_t        lock;
-        struct list_head waiting_ops;
-};
-typedef struct sp_inode_ctx sp_inode_ctx_t;
-
-struct sp_private {
-        struct mem_pool  *mem_pool;
-        uint32_t         entries;
-        gf_lock_t        lock;
-};
-typedef struct sp_private sp_private_t;
-
-void sp_local_free (sp_local_t *local);
-
-#define SP_STACK_UNWIND(op, frame, params ...) do {             \
-                sp_local_t *__local = frame->local;             \
-                frame->local = NULL;                            \
-                STACK_UNWIND_STRICT (op, frame, params);        \
-                sp_local_free (__local);                        \
-        } while (0)
-
-#define SP_STACK_DESTROY(frame) do {                    \
-                sp_local_t *__local = frame->local;     \
-                frame->local = NULL;                    \
-                STACK_DESTROY (frame->root);            \
-                sp_local_free (__local);                \
-        } while (0)
-
-#endif  /* #ifndef _STAT_PREFETCH_H */