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authorAmar Tumballi <amar@gluster.com>2011-07-01 04:41:54 +0000
committerAnand Avati <avati@gluster.com>2011-07-14 01:01:44 -0700
commit8d18bc22d1cfc8a481bc8d20da5843c65b567226 (patch)
tree680b1a4884b382aef8a8789a6dc6623797965fc4 /xlators/cluster
parent3f76fe277ec0a826bf3052134ad877ee65ce9e79 (diff)
distribute: bring in feature to do rebalance from inside
do the 'rebalance' on a file with 'setxattr()' with 'distribute.migrate-data' key. the valid 'value' is "force" or anything else. current implementation of 'rebalance' is same as 'glusterd-rebalance', and hence comes with limitation of not rebalancing hardlinks, non-regular files, and files with open-fds. Signed-off-by: Amar Tumballi <amar@gluster.com> Signed-off-by: Anand Avati <avati@gluster.com> BUG: 3070 (After 'rebalance', the gfid of the file gets changed) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=3070
Diffstat (limited to 'xlators/cluster')
-rw-r--r--xlators/cluster/dht/src/Makefile.am6
-rw-r--r--xlators/cluster/dht/src/dht-common.c55
-rw-r--r--xlators/cluster/dht/src/dht-common.h8
-rw-r--r--xlators/cluster/dht/src/dht-mem-types.h1
-rw-r--r--xlators/cluster/dht/src/dht-rebalance.c518
-rw-r--r--xlators/cluster/dht/src/dht.c9
-rw-r--r--xlators/cluster/dht/src/nufa.c9
-rw-r--r--xlators/cluster/dht/src/switch.c9
8 files changed, 600 insertions, 15 deletions
diff --git a/xlators/cluster/dht/src/Makefile.am b/xlators/cluster/dht/src/Makefile.am
index 8ebcab04451..cf883a974ca 100644
--- a/xlators/cluster/dht/src/Makefile.am
+++ b/xlators/cluster/dht/src/Makefile.am
@@ -3,11 +3,11 @@ xlator_LTLIBRARIES = dht.la nufa.la switch.la
xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/cluster
-dht_common_source = dht-layout.c dht-helper.c dht-linkfile.c \
+dht_common_source = dht-layout.c dht-helper.c dht-linkfile.c dht-rebalance.c \
dht-selfheal.c dht-rename.c dht-hashfn.c dht-diskusage.c \
$(top_builddir)/xlators/lib/src/libxlator.c
-dht_la_SOURCES = $(dht_common_source) dht.c
+dht_la_SOURCES = $(dht_common_source) dht.c
nufa_la_SOURCES = $(dht_common_source) nufa.c
switch_la_SOURCES = $(dht_common_source) switch.c
@@ -27,7 +27,7 @@ AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
-I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) \
-I$(top_srcdir)/xlators/lib/src
-CLEANFILES =
+CLEANFILES =
uninstall-local:
rm -f $(DESTDIR)$(xlatordir)/distribute.so
diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index d5ee7ad1b90..c4bc0b4dfd9 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -2084,6 +2084,7 @@ dht_setxattr (call_frame_t *frame, xlator_t *this,
data_t *tmp = NULL;
uint32_t dir_spread = 0;
char value[4096] = {0,};
+ int forced_rebalance = 0;
VALIDATE_OR_GOTO (frame, err);
@@ -2115,16 +2116,51 @@ dht_setxattr (call_frame_t *frame, xlator_t *this,
goto err;
}
- tmp = dict_get (xattr, GF_XATTR_FIX_LAYOUT_KEY);
+ ret = loc_dup (loc, &local->loc);
+ if (ret == -1) {
+ op_errno = ENOMEM;
+ goto err;
+ }
+
+ tmp = dict_get (xattr, "distribute.migrate-data");
if (tmp) {
- gf_log (this->name, GF_LOG_INFO,
- "fixing the layout of %s", loc->path);
+ if (!IA_ISREG (loc->inode->ia_type)) {
+ op_errno = ENOTSUP;
+ goto err;
+ }
- ret = loc_dup (loc, &local->loc);
- if (ret == -1) {
- op_errno = ENOMEM;
+ /* TODO: need to interpret the 'value' for more meaning
+ (ie, 'target' subvolume given there, etc) */
+ memcpy (value, tmp->data, tmp->len);
+ if (strcmp (value, "force") == 0)
+ forced_rebalance = 1;
+
+ local->to_subvol = dht_subvol_get_hashed (this, loc);
+ local->from_subvol = dht_subvol_get_cached (this, loc->inode);
+ if (local->to_subvol == local->from_subvol) {
+ op_errno = ENOTSUP;
goto err;
}
+ if (local->to_subvol) {
+ local->flags = forced_rebalance;
+
+ ret = dht_start_rebalance_task (this, frame);
+ if (!ret)
+ return 0;
+
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: failed to create a new synctask",
+ loc->path);
+ }
+ op_errno = ENOTSUP;
+ goto err;
+
+ }
+
+ tmp = dict_get (xattr, GF_XATTR_FIX_LAYOUT_KEY);
+ if (tmp) {
+ gf_log (this->name, GF_LOG_INFO,
+ "fixing the layout of %s", loc->path);
dht_fix_directory_layout (frame, dht_common_setxattr_cbk,
layout);
@@ -2140,11 +2176,6 @@ dht_setxattr (call_frame_t *frame, xlator_t *this,
(dir_spread > 0))) {
layout->spread_cnt = dir_spread;
- ret = loc_dup (loc, &local->loc);
- if (ret == -1) {
- op_errno = ENOMEM;
- goto err;
- }
dht_fix_directory_layout (frame,
dht_common_setxattr_cbk,
layout);
@@ -4869,7 +4900,7 @@ dht_forget (xlator_t *this, inode_t *inode)
uint64_t tmp_layout = 0;
dht_layout_t *layout = NULL;
- inode_ctx_get (inode, this, &tmp_layout);
+ inode_ctx_del (inode, this, &tmp_layout);
if (!tmp_layout)
return 0;
diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
index 43056c78c9f..2fe85d00e5f 100644
--- a/xlators/cluster/dht/src/dht-common.h
+++ b/xlators/cluster/dht/src/dht-common.h
@@ -24,6 +24,7 @@
#include "dht-mem-types.h"
#include "libxlator.h"
+#include "syncop.h"
#ifndef _DHT_H
#define _DHT_H
@@ -140,6 +141,10 @@ struct dht_local {
/* flag used to make sure we need to return estale in
{lookup,revalidate}_cbk */
char return_estale;
+
+ /* rebalance related */
+#define to_subvol hashed_subvol
+#define from_subvol cached_subvol
};
typedef struct dht_local dht_local_t;
@@ -178,6 +183,8 @@ struct dht_conf {
/* This is the count used as the distribute layout for a directory */
/* Will be a global flag to control the layout spread count */
uint32_t dir_spread_cnt;
+
+ struct syncenv *env; /* The env pointer to the rebalance synctask */
};
typedef struct dht_conf dht_conf_t;
@@ -330,4 +337,5 @@ int dht_fix_directory_layout (call_frame_t *frame,
dht_selfheal_dir_cbk_t dir_cbk,
dht_layout_t *layout);
+int dht_start_rebalance_task (xlator_t *this, call_frame_t *frame);
#endif /* _DHT_H */
diff --git a/xlators/cluster/dht/src/dht-mem-types.h b/xlators/cluster/dht/src/dht-mem-types.h
index 38bd3de1581..9dc2648a279 100644
--- a/xlators/cluster/dht/src/dht-mem-types.h
+++ b/xlators/cluster/dht/src/dht-mem-types.h
@@ -36,6 +36,7 @@ enum gf_dht_mem_types_ {
gf_switch_mt_switch_sched_array,
gf_switch_mt_switch_struct,
gf_dht_mt_subvol_time,
+ gf_dht_mt_loc_t,
gf_dht_mt_end
};
#endif
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
new file mode 100644
index 00000000000..6dea40f0b57
--- /dev/null
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -0,0 +1,518 @@
+/*
+ Copyright (c) 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 Affero 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
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "dht-common.h"
+
+#define GF_DISK_SECTOR_SIZE 512
+#define DHT_REBALANCE_PID 4242 /* Change it if required */
+#define DHT_REBALANCE_BLKSIZE (128 * 1024)
+#define DHT_MIGRATE_EVEN_IF_LINK_EXISTS 1
+
+static int
+dht_write_with_holes (xlator_t *to, fd_t *fd, struct iovec *vec, int count,
+ int32_t size, off_t offset, struct iobref *iobref)
+{
+ int i = 0;
+ int ret = -1;
+ int start_idx = 0;
+ int tmp_offset = 0;
+ int write_needed = 0;
+ int buf_len = 0;
+ int size_pending = 0;
+ char *buf = NULL;
+
+ /* loop through each vector */
+ for (i = 0; i < count; i++) {
+ buf = vec[i].iov_base;
+ buf_len = vec[i].iov_len;
+
+ for (start_idx = 0; (start_idx + GF_DISK_SECTOR_SIZE) <= buf_len;
+ start_idx += GF_DISK_SECTOR_SIZE) {
+
+ if (mem_0filled (buf + start_idx, GF_DISK_SECTOR_SIZE) != 0) {
+ write_needed = 1;
+ continue;
+ }
+
+ if (write_needed) {
+ ret = syncop_write (to, fd, (buf + tmp_offset),
+ (start_idx - tmp_offset),
+ (offset + tmp_offset),
+ iobref);
+ if (ret < 0)
+ goto out;
+
+ write_needed = 0;
+ }
+ tmp_offset = start_idx + GF_DISK_SECTOR_SIZE;
+ }
+
+ if ((start_idx < buf_len) || write_needed) {
+ /* This means, last chunk is not yet written.. write it */
+ ret = syncop_write (to, fd, (buf + tmp_offset),
+ (buf_len - tmp_offset),
+ (offset + tmp_offset), iobref);
+ if (ret < 0)
+ goto out;
+ }
+
+ size_pending = (size - buf_len);
+ if (!size_pending)
+ break;
+ }
+
+ /* do it regardless of all the above cases as we had to 'write' the
+ given number of bytes */
+ ret = syncop_ftruncate (to, fd, offset + size);
+ if (ret) {
+ gf_log (THIS->name, GF_LOG_WARNING,
+ "failed to perform truncate on %s", to->name);
+ goto out;
+ }
+
+ ret = size;
+out:
+ return ret;
+
+}
+
+static inline int
+__is_file_migratable (xlator_t *this, loc_t *loc, dict_t *rsp_dict,
+ struct iatt *stbuf)
+{
+ int ret = -1;
+ int open_fd_count = 0;
+
+ if (!IA_ISREG (stbuf->ia_type)) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: migrate-file called on non-regular entry (0%o)",
+ loc->path, stbuf->ia_type);
+ ret = -1;
+ goto out;
+ }
+
+ if (stbuf->ia_nlink > 1) {
+ /* TODO : support migrating hardlinks */
+ gf_log (this->name, GF_LOG_WARNING, "%s: file has hardlinks",
+ loc->path);
+ ret = -ENOTSUP;
+ goto out;
+ }
+
+ ret = dict_get_int32 (rsp_dict, GLUSTERFS_OPEN_FD_COUNT, &open_fd_count);
+ if (!ret && (open_fd_count > 0)) {
+ /* TODO: support migration of files with open fds */
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: file has open fds, not attempting migration",
+ loc->path);
+ goto out;
+ }
+ ret = 0;
+
+out:
+ return ret;
+}
+
+static inline int
+__dht_rebalance_create_dst_file (xlator_t *to, loc_t *loc, struct iatt *stbuf,
+ dict_t *dict, fd_t **dst_fd, int *need_unlink)
+{
+ xlator_t *this = NULL;
+ int ret = -1;
+ mode_t mode = 0;
+ fd_t *fd = NULL;
+ struct iatt new_stbuf = {0,};
+
+ this = THIS;
+
+ ret = dict_set_static_bin (dict, "gfid-req", stbuf->ia_gfid, 16);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: failed to set gfid in dict for create", loc->path);
+ goto out;
+ }
+
+ fd = fd_create (loc->inode, DHT_REBALANCE_PID);
+ if (!fd) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: fd create failed (destination)", loc->path);
+ ret = -1;
+ goto out;
+ }
+
+ ret = syncop_lookup (to, loc, NULL, &new_stbuf, NULL, NULL);
+ if (ret) {
+ gf_log (this->name, GF_LOG_DEBUG, "failed to lookup %s on %s",
+ loc->path, to->name);
+
+ mode = st_mode_from_ia (stbuf->ia_prot, stbuf->ia_type);
+ ret = syncop_create (to, loc, O_WRONLY, mode, fd, dict);
+ if (ret < 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to create %s on %s", loc->path, to->name);
+ goto out;
+ }
+
+ *need_unlink = 1;
+ goto done;
+ }
+
+ /* File exits in the destination, just do the open if gfid matches */
+ if (uuid_compare (stbuf->ia_gfid, new_stbuf.ia_gfid) != 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "file %s exits in %s with different gfid",
+ loc->path, to->name);
+ fd_unref (fd);
+ goto out;
+ }
+
+ ret = syncop_open (to, loc, O_WRONLY, fd);
+ if (ret < 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to open file %s on %s",
+ loc->path, to->name);
+ fd_unref (fd);
+ goto out;
+ }
+done:
+ if (dst_fd)
+ *dst_fd = fd;
+
+ /* success */
+ ret = 0;
+
+out:
+ return ret;
+}
+
+static inline int
+__dht_check_free_space (xlator_t *to, xlator_t *from, loc_t *loc,
+ struct iatt *stbuf)
+{
+ struct statvfs src_statfs = {0,};
+ struct statvfs dst_statfs = {0,};
+ int ret = -1;
+ xlator_t *this = NULL;
+
+ this = THIS;
+
+ ret = syncop_statfs (from, loc, &src_statfs);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to get statfs of %s on %s",
+ loc->path, from->name);
+ goto out;
+ }
+
+ ret = syncop_statfs (to, loc, &dst_statfs);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to get statfs of %s on %s",
+ loc->path, to->name);
+ goto out;
+ }
+ if (((dst_statfs.f_bavail *
+ dst_statfs.f_bsize) / GF_DISK_SECTOR_SIZE) >
+ (((src_statfs.f_bavail * src_statfs.f_bsize) /
+ GF_DISK_SECTOR_SIZE) - stbuf->ia_blocks)) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "data movement attempted from node (%s) with"
+ " higher disk space to a node (%s) with "
+ "lesser disk space (%s)", from->name,
+ to->name, loc->path);
+
+ ret = -1;
+ goto out;
+ }
+
+ ret = 0;
+out:
+ return ret;
+}
+
+static inline int
+__dht_rebalane_migrate_data (xlator_t *from, xlator_t *to, fd_t *src, fd_t *dst,
+ int hole_exists)
+{
+ int ret = -1;
+ int count = 0;
+ off_t offset = 0;
+ struct iovec *vector = NULL;
+ struct iobref *iobref = NULL;
+
+ while (1) {
+ ret = syncop_readv (from, src, DHT_REBALANCE_BLKSIZE,
+ offset, &vector, &count, &iobref);
+ if (!ret || (ret < 0)) {
+ break;
+ }
+
+ if (hole_exists)
+ ret = dht_write_with_holes (to, dst, vector, count,
+ ret, offset, iobref);
+ else
+ ret = syncop_writev (to, dst, vector, count,
+ offset, iobref);
+ if (ret < 0) {
+ break;
+ }
+ offset += ret;
+
+ if (vector)
+ GF_FREE (vector);
+ if (iobref)
+ iobref_unref (iobref);
+ iobref = NULL;
+ vector = NULL;
+ }
+ if (iobref)
+ iobref_unref (iobref);
+ if (vector)
+ GF_FREE (vector);
+
+ if (ret >= 0)
+ ret = 0;
+
+ return ret;
+}
+
+int
+dht_migrate_file (xlator_t *this, loc_t *loc, xlator_t *from, xlator_t *to,
+ int flag)
+{
+ int ret = -1;
+ struct iatt new_stbuf = {0,};
+ struct iatt stbuf = {0,};
+ fd_t *src_fd = NULL;
+ fd_t *dst_fd = NULL;
+ dict_t *dict = NULL;
+ dict_t *xattr = NULL;
+ dict_t *rsp_dict = NULL;
+ int file_has_holes = 0;
+ int need_unlink = 0;
+
+ gf_log (this->name, GF_LOG_INFO, "%s: attempting to move from %s to %s",
+ loc->path, from->name, to->name);
+
+ dict = dict_new ();
+ if (!dict)
+ goto out;
+
+ ret = dict_set_int32 (dict, GLUSTERFS_OPEN_FD_COUNT, 4);
+ if (ret)
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to set fd-count key in dict, may attempt "
+ "migration of file which has open fds", loc->path);
+
+ ret = syncop_lookup (from, loc, dict, &stbuf, &rsp_dict, NULL);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR, "failed to lookup %s on %s",
+ loc->path, from->name);
+ goto out;
+ }
+
+ /* Check if file can be migrated */
+ ret = __is_file_migratable (this, loc, rsp_dict, &stbuf);
+ if (ret)
+ goto out;
+
+ /* create the destination */
+ ret = __dht_rebalance_create_dst_file (to, loc, &stbuf, dict, &dst_fd,
+ &need_unlink);
+ if (ret)
+ goto out;
+
+ /* Should happen on all files when 'force' option is not given */
+ if (flag != DHT_MIGRATE_EVEN_IF_LINK_EXISTS) {
+ ret = __dht_check_free_space (to, from, loc, &stbuf);
+ if (ret)
+ goto out;
+ }
+
+ /* Try to preserve 'holes' while migrating data */
+ if (stbuf.ia_size > (stbuf.ia_blocks * GF_DISK_SECTOR_SIZE))
+ file_has_holes = 1;
+
+ src_fd = fd_create (loc->inode, DHT_REBALANCE_PID);
+ if (!src_fd) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "%s: fd create failed (source)", loc->path);
+ ret = -1;
+ goto out;
+ }
+
+ ret = syncop_open (from, loc, O_RDONLY, src_fd);
+ if (ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to open file %s on %s",
+ loc->path, from->name);
+ goto out;
+ }
+
+ /* All I/O happens in this function */
+ ret = __dht_rebalane_migrate_data (from, to, src_fd, dst_fd,
+ file_has_holes);
+ if (ret) {
+ gf_log (this->name, GF_LOG_ERROR, "%s: failed to migrate data",
+ loc->path);
+ goto out;
+ }
+
+ ret = syncop_lookup (from, loc, NULL, &new_stbuf, NULL, NULL);
+ if (ret < 0) {
+ /* Failed to get the stat info */
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to lookup file %s on %s",
+ loc->path, from->name);
+ need_unlink = 0;
+ goto out;
+ }
+
+ /* No need to rebalance, if there is some
+ activity on source file */
+ if (new_stbuf.ia_mtime != stbuf.ia_mtime) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: ignoring destination file as source has "
+ "undergone some changes while migration was happening",
+ loc->path);
+ ret = -1;
+ goto out;
+ }
+
+ ret = syncop_setattr (to, loc, &new_stbuf,
+ (GF_SET_ATTR_UID | GF_SET_ATTR_GID |
+ GF_SET_ATTR_MODE | GF_SET_ATTR_ATIME |
+ GF_SET_ATTR_MTIME), NULL, NULL);
+ if (ret) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to perform setattr on %s",
+ loc->path, to->name);
+ }
+
+ ret = syncop_listxattr (from, loc, &xattr);
+ if (ret == -1)
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to get xattr from %s", loc->path, from->name);
+
+ ret = syncop_setxattr (to, loc, xattr, 0);
+ if (ret == -1)
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to set xattr on %s", loc->path, to->name);
+
+ /* rebalance complete */
+ syncop_close (dst_fd);
+ syncop_close (src_fd);
+ syncop_unlink (from, loc);
+ need_unlink = 0;
+
+ gf_log (this->name, GF_LOG_INFO,
+ "completed migration of %s from subvolume %s to %s",
+ loc->path, from->name, to->name);
+
+ ret = 0;
+out:
+ if (dict)
+ dict_unref (dict);
+
+ if (ret) {
+ if (dst_fd)
+ syncop_close (dst_fd);
+ if (src_fd)
+ syncop_close (src_fd);
+ if (need_unlink)
+ syncop_unlink (to, loc);
+ }
+
+ return ret;
+}
+
+static int
+rebalance_task (void *data)
+{
+ int ret = -1;
+ xlator_t *this = NULL;
+ dht_local_t *local = NULL;
+ call_frame_t *frame = NULL;
+
+ frame = data;
+ this = THIS;
+
+ local = frame->local;
+
+ /* This function is 'synchrounous', hence if it returns,
+ we are done with the task */
+ ret = dht_migrate_file (THIS, &local->loc, local->from_subvol,
+ local->to_subvol, local->flags);
+
+ return ret;
+}
+
+static int
+rebalance_task_completion (int op_ret, call_frame_t *sync_frame, void *data)
+{
+ int ret = -1;
+ uint64_t layout_int = 0;
+ dht_layout_t *layout = 0;
+ xlator_t *this = NULL;
+ dht_local_t *local = NULL;
+
+ this = THIS;
+ local = sync_frame->local;
+
+ if (!op_ret) {
+ /* Make sure we have valid 'layout' in inode ctx
+ after the operation */
+ ret = inode_ctx_del (local->loc.inode, this, &layout_int);
+ if (!ret && layout_int) {
+ layout = (dht_layout_t *)(long)layout_int;
+ dht_layout_unref (this, layout);
+ }
+
+ ret = dht_layout_preset (this, local->to_subvol,
+ local->loc.inode);
+ if (ret)
+ gf_log (this->name, GF_LOG_WARNING,
+ "%s: failed to set inode ctx", local->loc.path);
+ }
+
+ /* if success, errno is not checked,
+ if ret is -1, then let errno be 'ENOTSUP' */
+ DHT_STACK_UNWIND (setxattr, sync_frame, op_ret, ENOTSUP);
+ return 0;
+}
+
+int
+dht_start_rebalance_task (xlator_t *this, call_frame_t *frame)
+{
+ int ret = -1;
+ dht_conf_t *conf = NULL;
+
+ conf = this->private;
+
+ ret = synctask_new (conf->env, rebalance_task,
+ rebalance_task_completion,
+ frame, frame);
+ return ret;
+}
diff --git a/xlators/cluster/dht/src/dht.c b/xlators/cluster/dht/src/dht.c
index 42f0c0d75e8..e78ee1b45e6 100644
--- a/xlators/cluster/dht/src/dht.c
+++ b/xlators/cluster/dht/src/dht.c
@@ -501,6 +501,15 @@ init (xlator_t *this)
conf->gen = 1;
+ /* Create 'syncop' environment */
+ conf->env = syncenv_new (0);
+ if (!conf->env) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to create sync environment %s",
+ strerror (errno));
+ goto err;
+ }
+
this->private = conf;
return 0;
diff --git a/xlators/cluster/dht/src/nufa.c b/xlators/cluster/dht/src/nufa.c
index 45fea55ae3b..b3d17351a9b 100644
--- a/xlators/cluster/dht/src/nufa.c
+++ b/xlators/cluster/dht/src/nufa.c
@@ -644,6 +644,15 @@ init (xlator_t *this)
goto err;
}
+ /* Create 'syncop' environment */
+ conf->env = syncenv_new (0);
+ if (!conf->env) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to create sync environment %s",
+ strerror (errno));
+ goto err;
+ }
+
this->private = conf;
return 0;
diff --git a/xlators/cluster/dht/src/switch.c b/xlators/cluster/dht/src/switch.c
index e4bed0dd96e..211834fb5fe 100644
--- a/xlators/cluster/dht/src/switch.c
+++ b/xlators/cluster/dht/src/switch.c
@@ -949,6 +949,15 @@ init (xlator_t *this)
goto err;
}
+ /* Create 'syncop' environment */
+ conf->env = syncenv_new (0);
+ if (!conf->env) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "failed to create sync environment %s",
+ strerror (errno));
+ goto err;
+ }
+
this->private = conf;
return 0;