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-rw-r--r--xlators/cluster/afr/src/afr-self-heal-metadata.c791
1 files changed, 791 insertions, 0 deletions
diff --git a/xlators/cluster/afr/src/afr-self-heal-metadata.c b/xlators/cluster/afr/src/afr-self-heal-metadata.c
new file mode 100644
index 000000000..e65a426db
--- /dev/null
+++ b/xlators/cluster/afr/src/afr-self-heal-metadata.c
@@ -0,0 +1,791 @@
+/*
+ Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include <libgen.h>
+#include <unistd.h>
+#include <fnmatch.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "afr.h"
+#include "dict.h"
+#include "xlator.h"
+#include "hashfn.h"
+#include "logging.h"
+#include "stack.h"
+#include "list.h"
+#include "call-stub.h"
+#include "defaults.h"
+#include "common-utils.h"
+#include "compat-errno.h"
+#include "compat.h"
+#include "byte-order.h"
+
+#include "afr-transaction.h"
+#include "afr-self-heal.h"
+#include "afr-self-heal-common.h"
+
+
+int
+afr_sh_metadata_done (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int i = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+// memset (sh->child_errno, 0, sizeof (int) * priv->child_count);
+ memset (sh->buf, 0, sizeof (struct stat) * priv->child_count);
+ memset (sh->success, 0, sizeof (int) * priv->child_count);
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (sh->xattr[i])
+ dict_unref (sh->xattr[i]);
+ sh->xattr[i] = NULL;
+ }
+
+ if (local->govinda_gOvinda) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "aborting selfheal of %s",
+ local->loc.path);
+ sh->completion_cbk (frame, this);
+ } else {
+ if (S_ISREG (local->cont.lookup.buf.st_mode)) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "proceeding to data check on %s",
+ local->loc.path);
+ afr_self_heal_data (frame, this);
+ return 0;
+ }
+
+ if (S_ISDIR (local->cont.lookup.buf.st_mode)) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "proceeding to entry check on %s",
+ local->loc.path);
+ afr_self_heal_entry (frame, this);
+ return 0;
+ }
+ gf_log (this->name, GF_LOG_DEBUG,
+ "completed self heal of %s",
+ local->loc.path);
+
+ sh->completion_cbk (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_unlck_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ afr_local_t *local = NULL;
+ int call_count = 0;
+
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ afr_sh_metadata_done (frame, this);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_finish (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int i = 0;
+ int call_count = 0;
+ struct flock flock = {0, };
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ call_count = local->child_count;
+ local->call_count = call_count;
+
+ for (i = 0; i < priv->child_count; i++) {
+ flock.l_start = 0;
+ flock.l_len = 0;
+ flock.l_type = F_UNLCK;
+
+ if (local->child_up[i]) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "unlocking %s on subvolume %s",
+ local->loc.path, priv->children[i]->name);
+
+ STACK_WIND (frame, afr_sh_metadata_unlck_cbk,
+ priv->children[i],
+ priv->children[i]->fops->inodelk,
+ &local->loc, F_SETLK, &flock);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_erase_pending_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret,
+ int32_t op_errno, dict_t *xattr)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ afr_sh_metadata_finish (frame, this);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_erase_pending (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+ int i = 0;
+ dict_t **erase_xattr = NULL;
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+
+ afr_sh_pending_to_delta (sh->pending_matrix, sh->delta_matrix,
+ sh->success, priv->child_count);
+
+ erase_xattr = CALLOC (sizeof (*erase_xattr), priv->child_count);
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (sh->xattr[i]) {
+ call_count++;
+
+ erase_xattr[i] = get_new_dict();
+ dict_ref (erase_xattr[i]);
+ }
+ }
+
+ afr_sh_delta_to_xattr (sh->delta_matrix, erase_xattr,
+ priv->child_count, AFR_METADATA_PENDING);
+
+ local->call_count = call_count;
+
+ if (call_count == 0) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "metadata of %s not healed on any subvolume",
+ local->loc.path);
+
+ afr_sh_metadata_finish (frame, this);
+ }
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (!erase_xattr[i])
+ continue;
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "erasing pending flags from %s on %s",
+ local->loc.path, priv->children[i]->name);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_erase_pending_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->xattrop,
+ &local->loc,
+ GF_XATTROP_ADD_ARRAY, erase_xattr[i]);
+ if (!--call_count)
+ break;
+ }
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (erase_xattr[i]) {
+ dict_unref (erase_xattr[i]);
+ }
+ }
+ FREE (erase_xattr);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_sync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+ int child_index = 0;
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ child_index = (long) cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "setting attributes failed for %s on %s (%s)",
+ local->loc.path,
+ priv->children[child_index]->name,
+ strerror (op_errno));
+
+ sh->success[child_index] = 0;
+ }
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ afr_sh_metadata_erase_pending (frame, this);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct stat *buf)
+{
+ afr_sh_metadata_sync_cbk (frame, cookie, this, op_ret, op_errno);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_xattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ afr_sh_metadata_sync_cbk (frame, cookie, this, op_ret, op_errno);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_sync (call_frame_t *frame, xlator_t *this, dict_t *xattr)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int source = 0;
+ int active_sinks = 0;
+ int call_count = 0;
+ int i = 0;
+ struct timespec ts[2];
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ source = sh->source;
+ active_sinks = sh->active_sinks;
+
+ /*
+ * 4 calls per sink - chown, chmod, utimes, setxattr
+ */
+ if (xattr)
+ call_count = active_sinks * 4;
+ else
+ call_count = active_sinks * 3;
+
+ local->call_count = call_count;
+
+#ifdef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
+ ts[0] = sh->buf[source].st_atim;
+ ts[1] = sh->buf[source].st_mtim;
+#elif HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
+ ts[0] = sh->buf[source].st_atimespec;
+ ts[1] = sh->buf[source].st_mtimespec;
+#else
+ ts[0].tv_sec = sh->buf[source].st_atime;
+ ts[1].tv_sec = sh->buf[source].st_mtime;
+#endif
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (call_count == 0) {
+ break;
+ }
+ if (sh->sources[i] || !local->child_up[i])
+ continue;
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "syncing metadata of %s from %s to %s",
+ local->loc.path, priv->children[source]->name,
+ priv->children[i]->name);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_attr_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->chown,
+ &local->loc,
+ sh->buf[source].st_uid,
+ sh->buf[source].st_gid);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_attr_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->chmod,
+ &local->loc, sh->buf[source].st_mode);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_attr_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->utimens,
+ &local->loc, ts);
+
+ call_count = call_count - 3;
+
+ if (!xattr)
+ continue;
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_xattr_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->setxattr,
+ &local->loc, xattr, 0);
+ call_count--;
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_getxattr_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this,
+ int32_t op_ret, int32_t op_errno, dict_t *xattr)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int source = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ source = sh->source;
+
+ if (op_ret == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "getxattr of %s failed on subvolume %s (%s). proceeding without xattr",
+ local->loc.path, priv->children[source]->name,
+ strerror (op_errno));
+
+ afr_sh_metadata_sync (frame, this, NULL);
+ } else {
+ dict_del (xattr, AFR_DATA_PENDING);
+ dict_del (xattr, AFR_METADATA_PENDING);
+ dict_del (xattr, AFR_ENTRY_PENDING);
+ afr_sh_metadata_sync (frame, this, xattr);
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_sync_prepare (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int active_sinks = 0;
+ int source = 0;
+ int i = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ source = sh->source;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (sh->sources[i] == 0 && local->child_up[i] == 1) {
+ active_sinks++;
+ sh->success[i] = 1;
+ }
+ }
+ sh->success[source] = 1;
+
+ if (active_sinks == 0) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "no active sinks for performing self-heal on file %s",
+ local->loc.path);
+ afr_sh_metadata_finish (frame, this);
+ return 0;
+ }
+ sh->active_sinks = active_sinks;
+
+ gf_log (this->name, GF_LOG_DEBUG,
+ "syncing metadata of %s from subvolume %s to %d active sinks",
+ local->loc.path, priv->children[source]->name, active_sinks);
+
+ STACK_WIND (frame, afr_sh_metadata_getxattr_cbk,
+ priv->children[source],
+ priv->children[source]->fops->getxattr,
+ &local->loc, NULL);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_fix (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int nsources = 0;
+ int source = 0;
+ int i = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ afr_sh_build_pending_matrix (sh->pending_matrix, sh->xattr,
+ priv->child_count, AFR_METADATA_PENDING);
+
+ afr_sh_print_pending_matrix (sh->pending_matrix, this);
+
+ afr_sh_mark_sources (sh->pending_matrix, sh->sources,
+ priv->child_count);
+
+ afr_sh_supress_errenous_children (sh->sources, sh->child_errno,
+ priv->child_count);
+
+ nsources = afr_sh_source_count (sh->sources, priv->child_count);
+
+ if ((nsources == 0)
+ && (priv->favorite_child != -1)
+ && (sh->child_errno[priv->favorite_child] == 0)) {
+
+ gf_log (this->name, GF_LOG_WARNING,
+ "Picking favorite child %s as authentic source to resolve conflicting metadata of %s",
+ priv->children[priv->favorite_child]->name,
+ local->loc.path);
+
+ sh->sources[priv->favorite_child] = 1;
+
+ nsources = afr_sh_source_count (sh->sources,
+ priv->child_count);
+ }
+
+ if (nsources == 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Unable to resolve conflicting metadata of %s. "
+ "Please resolve manually by fixing the "
+ "permissions/ownership of %s on your subvolumes. "
+ "You can also consider 'option favorite-child <>'",
+ local->loc.path, local->loc.path);
+
+ local->govinda_gOvinda = 1;
+
+ afr_sh_metadata_finish (frame, this);
+ return 0;
+ }
+
+ source = afr_sh_select_source (sh->sources, priv->child_count);
+ sh->source = source;
+
+ /* detect changes not visible through pending flags -- JIC */
+ for (i = 0; i < priv->child_count; i++) {
+ if (i == source || sh->child_errno[i])
+ continue;
+
+ if (PERMISSION_DIFFERS (&sh->buf[i], &sh->buf[source]))
+ sh->sources[i] = 0;
+
+ if (OWNERSHIP_DIFFERS (&sh->buf[i], &sh->buf[source]))
+ sh->sources[i] = 0;
+ }
+
+ afr_sh_metadata_sync_prepare (frame, this);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ inode_t *inode, struct stat *buf, dict_t *xattr)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+ int child_index = 0;
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ child_index = (long) cookie;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "path %s on subvolume %s is of mode 0%o",
+ local->loc.path,
+ priv->children[child_index]->name,
+ buf->st_mode);
+
+ sh->buf[child_index] = *buf;
+ if (xattr)
+ sh->xattr[child_index] = dict_ref (xattr);
+ } else {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "path %s on subvolume %s => -1 (%s)",
+ local->loc.path,
+ priv->children[child_index]->name,
+ strerror (op_errno));
+
+ sh->child_errno[child_index] = op_errno;
+ }
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ afr_sh_metadata_fix (frame, this);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_lookup (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int i = 0;
+ int call_count = 0;
+ dict_t *xattr_req = NULL;
+ int ret = 0;
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ call_count = local->child_count;
+ local->call_count = call_count;
+
+ xattr_req = dict_new();
+
+ if (xattr_req)
+ ret = dict_set_uint64 (xattr_req, AFR_METADATA_PENDING,
+ priv->child_count * sizeof(int32_t));
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "looking up %s on %s",
+ local->loc.path, priv->children[i]->name);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_lookup_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->lookup,
+ &local->loc, xattr_req);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ if (xattr_req)
+ dict_unref (xattr_req);
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int call_count = 0;
+ int child_index = (long) cookie;
+
+ /* TODO: what if lock fails? */
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == -1) {
+ sh->op_failed = 1;
+
+ gf_log (this->name,
+ (op_errno == EAGAIN ? GF_LOG_DEBUG : GF_LOG_ERROR),
+ "locking of %s on child %d failed: %s",
+ local->loc.path, child_index,
+ strerror (op_errno));
+ } else {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "inode of %s on child %d locked",
+ local->loc.path, child_index);
+ }
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ if (sh->op_failed) {
+ afr_sh_metadata_finish (frame, this);
+ return 0;
+ }
+
+ afr_sh_metadata_lookup (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+afr_sh_metadata_lock (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int i = 0;
+ int call_count = 0;
+ struct flock flock = {0, };
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+ priv = this->private;
+
+ call_count = local->child_count;
+ local->call_count = call_count;
+
+ for (i = 0; i < priv->child_count; i++) {
+ flock.l_start = 0;
+ flock.l_len = 0;
+ flock.l_type = F_WRLCK;
+
+ if (local->child_up[i]) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "locking %s on subvolume %s",
+ local->loc.path, priv->children[i]->name);
+
+ STACK_WIND_COOKIE (frame, afr_sh_metadata_lk_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->inodelk,
+ &local->loc, F_SETLK, &flock);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+int
+afr_self_heal_metadata (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = this->private;
+
+
+ local = frame->local;
+ sh = &local->self_heal;
+
+ if (local->need_metadata_self_heal && priv->metadata_self_heal) {
+ afr_sh_metadata_lock (frame, this);
+ } else {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "proceeding to data check on %s",
+ local->loc.path);
+ afr_sh_metadata_done (frame, this);
+ }
+
+ return 0;
+}
+
generated by cgit (git 2.34.1) at 2024-11-04 17:58:37 +0000