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authorPavan Sondur <pavan@gluster.com>2010-08-06 05:31:45 +0000
committerAnand V. Avati <avati@dev.gluster.com>2010-08-06 04:09:07 -0700
commitacdeed002d30209e0a058c2df0346d4f16c08994 (patch)
tree9c6acda8d92494952f4a80134303b9d2d1c3e1ac /xlators/cluster/afr/src/afr-common.c
parent453cb4bf0b70c876eb468def34054095cfd66359 (diff)
add pump xlator and changes for replace-brick
Signed-off-by: Pavan Vilas Sondur <pavan@gluster.com> Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 1235 (Bug for all pump/migrate commits) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=1235
Diffstat (limited to 'xlators/cluster/afr/src/afr-common.c')
-rw-r--r--xlators/cluster/afr/src/afr-common.c2642
1 files changed, 2642 insertions, 0 deletions
diff --git a/xlators/cluster/afr/src/afr-common.c b/xlators/cluster/afr/src/afr-common.c
new file mode 100644
index 000000000..aeadceddb
--- /dev/null
+++ b/xlators/cluster/afr/src/afr-common.c
@@ -0,0 +1,2642 @@
+/*
+ Copyright (c) 2007-2009 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 <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 "statedump.h"
+
+#include "fd.h"
+
+#include "afr-inode-read.h"
+#include "afr-inode-write.h"
+#include "afr-dir-read.h"
+#include "afr-dir-write.h"
+#include "afr-transaction.h"
+#include "afr-self-heal.h"
+#include "afr-self-heal-common.h"
+#include "pump.h"
+
+#define AFR_ICTX_OPENDIR_DONE_MASK 0x0000000200000000ULL
+#define AFR_ICTX_SPLIT_BRAIN_MASK 0x0000000100000000ULL
+#define AFR_ICTX_READ_CHILD_MASK 0x00000000FFFFFFFFULL
+
+void
+afr_set_lk_owner (call_frame_t *frame, xlator_t *this)
+{
+ if (!frame->root->lk_owner) {
+ gf_log (this->name, GF_LOG_TRACE,
+ "Setting lk-owner=%llu",
+ (unsigned long long) frame->root);
+ frame->root->lk_owner = (uint64_t) frame->root;
+ }
+}
+
+uint64_t
+afr_is_split_brain (xlator_t *this, inode_t *inode)
+{
+ int ret = 0;
+
+ uint64_t ctx = 0;
+ uint64_t split_brain = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0)
+ goto unlock;
+
+ split_brain = ctx & AFR_ICTX_SPLIT_BRAIN_MASK;
+ }
+unlock:
+ UNLOCK (&inode->lock);
+
+out:
+ return split_brain;
+}
+
+
+void
+afr_set_split_brain (xlator_t *this, inode_t *inode, gf_boolean_t set)
+{
+ uint64_t ctx = 0;
+ int ret = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0) {
+ ctx = 0;
+ }
+
+ if (set) {
+ ctx = (~AFR_ICTX_SPLIT_BRAIN_MASK & ctx)
+ | (0xFFFFFFFFFFFFFFFFULL & AFR_ICTX_SPLIT_BRAIN_MASK);
+ } else {
+ ctx = (~AFR_ICTX_SPLIT_BRAIN_MASK & ctx);
+ }
+ __inode_ctx_put (inode, this, ctx);
+ }
+ UNLOCK (&inode->lock);
+out:
+ return;
+}
+
+
+uint64_t
+afr_is_opendir_done (xlator_t *this, inode_t *inode)
+{
+ int ret = 0;
+
+ uint64_t ctx = 0;
+ uint64_t opendir_done = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0)
+ goto unlock;
+
+ opendir_done = ctx & AFR_ICTX_OPENDIR_DONE_MASK;
+ }
+unlock:
+ UNLOCK (&inode->lock);
+
+out:
+ return opendir_done;
+}
+
+
+void
+afr_set_opendir_done (xlator_t *this, inode_t *inode)
+{
+ uint64_t ctx = 0;
+ int ret = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0) {
+ ctx = 0;
+ }
+
+ ctx = (~AFR_ICTX_OPENDIR_DONE_MASK & ctx)
+ | (0xFFFFFFFFFFFFFFFFULL & AFR_ICTX_OPENDIR_DONE_MASK);
+
+ __inode_ctx_put (inode, this, ctx);
+ }
+ UNLOCK (&inode->lock);
+out:
+ return;
+}
+
+
+uint64_t
+afr_read_child (xlator_t *this, inode_t *inode)
+{
+ int ret = 0;
+
+ uint64_t ctx = 0;
+ uint64_t read_child = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0)
+ goto unlock;
+
+ read_child = ctx & AFR_ICTX_READ_CHILD_MASK;
+ }
+unlock:
+ UNLOCK (&inode->lock);
+
+out:
+ return read_child;
+}
+
+
+void
+afr_set_read_child (xlator_t *this, inode_t *inode, int32_t read_child)
+{
+ uint64_t ctx = 0;
+ int ret = 0;
+
+ VALIDATE_OR_GOTO (inode, out);
+
+ LOCK (&inode->lock);
+ {
+ ret = __inode_ctx_get (inode, this, &ctx);
+
+ if (ret < 0) {
+ ctx = 0;
+ }
+
+ ctx = (~AFR_ICTX_READ_CHILD_MASK & ctx)
+ | (AFR_ICTX_READ_CHILD_MASK & read_child);
+
+ __inode_ctx_put (inode, this, ctx);
+ }
+ UNLOCK (&inode->lock);
+
+out:
+ return;
+}
+
+
+/**
+ * afr_local_cleanup - cleanup everything in frame->local
+ */
+
+void
+afr_local_sh_cleanup (afr_local_t *local, xlator_t *this)
+{
+ afr_self_heal_t *sh = NULL;
+ afr_private_t *priv = NULL;
+ int i = 0;
+
+
+ sh = &local->self_heal;
+ priv = this->private;
+
+ if (sh->buf)
+ GF_FREE (sh->buf);
+
+ if (sh->xattr) {
+ for (i = 0; i < priv->child_count; i++) {
+ if (sh->xattr[i]) {
+ dict_unref (sh->xattr[i]);
+ sh->xattr[i] = NULL;
+ }
+ }
+ GF_FREE (sh->xattr);
+ }
+
+ if (sh->child_errno)
+ GF_FREE (sh->child_errno);
+
+ if (sh->pending_matrix) {
+ for (i = 0; i < priv->child_count; i++) {
+ GF_FREE (sh->pending_matrix[i]);
+ }
+ GF_FREE (sh->pending_matrix);
+ }
+
+ if (sh->delta_matrix) {
+ for (i = 0; i < priv->child_count; i++) {
+ GF_FREE (sh->delta_matrix[i]);
+ }
+ GF_FREE (sh->delta_matrix);
+ }
+
+ if (sh->sources)
+ GF_FREE (sh->sources);
+
+ if (sh->success)
+ GF_FREE (sh->success);
+
+ if (sh->locked_nodes)
+ GF_FREE (sh->locked_nodes);
+
+ if (sh->healing_fd && !sh->healing_fd_opened) {
+ fd_unref (sh->healing_fd);
+ sh->healing_fd = NULL;
+ }
+
+ if (sh->linkname)
+ GF_FREE ((char *)sh->linkname);
+
+ loc_wipe (&sh->parent_loc);
+}
+
+
+void
+afr_local_transaction_cleanup (afr_local_t *local, xlator_t *this)
+{
+ int i = 0;
+ afr_private_t * priv = NULL;
+
+ priv = this->private;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->pending && local->pending[i])
+ GF_FREE (local->pending[i]);
+ }
+
+ GF_FREE (local->pending);
+
+ GF_FREE (local->transaction.locked_nodes);
+ GF_FREE (local->transaction.child_errno);
+ GF_FREE (local->child_errno);
+
+ GF_FREE (local->transaction.basename);
+ GF_FREE (local->transaction.new_basename);
+
+ loc_wipe (&local->transaction.parent_loc);
+ loc_wipe (&local->transaction.new_parent_loc);
+}
+
+
+void
+afr_local_cleanup (afr_local_t *local, xlator_t *this)
+{
+ int i;
+ afr_private_t * priv = NULL;
+
+ if (!local)
+ return;
+
+ afr_local_sh_cleanup (local, this);
+
+ afr_local_transaction_cleanup (local, this);
+
+ priv = this->private;
+
+ loc_wipe (&local->loc);
+ loc_wipe (&local->newloc);
+
+ if (local->fd)
+ fd_unref (local->fd);
+
+ if (local->xattr_req)
+ dict_unref (local->xattr_req);
+
+ GF_FREE (local->child_up);
+
+ { /* lookup */
+ if (local->cont.lookup.xattrs) {
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->cont.lookup.xattrs[i]) {
+ dict_unref (local->cont.lookup.xattrs[i]);
+ local->cont.lookup.xattrs[i] = NULL;
+ }
+ }
+ GF_FREE (local->cont.lookup.xattrs);
+ local->cont.lookup.xattrs = NULL;
+ }
+
+ if (local->cont.lookup.xattr) {
+ dict_unref (local->cont.lookup.xattr);
+ }
+
+ if (local->cont.lookup.inode) {
+ inode_unref (local->cont.lookup.inode);
+ }
+ }
+
+ { /* getxattr */
+ if (local->cont.getxattr.name)
+ GF_FREE (local->cont.getxattr.name);
+ }
+
+ { /* lk */
+ if (local->cont.lk.locked_nodes)
+ GF_FREE (local->cont.lk.locked_nodes);
+ }
+
+ { /* create */
+ if (local->cont.create.fd)
+ fd_unref (local->cont.create.fd);
+ }
+
+ { /* writev */
+ GF_FREE (local->cont.writev.vector);
+ }
+
+ { /* setxattr */
+ if (local->cont.setxattr.dict)
+ dict_unref (local->cont.setxattr.dict);
+ }
+
+ { /* removexattr */
+ GF_FREE (local->cont.removexattr.name);
+ }
+
+ { /* symlink */
+ GF_FREE (local->cont.symlink.linkpath);
+ }
+
+ { /* opendir */
+ if (local->cont.opendir.checksum)
+ GF_FREE (local->cont.opendir.checksum);
+ }
+}
+
+
+int
+afr_frame_return (call_frame_t *frame)
+{
+ afr_local_t *local = NULL;
+ int call_count = 0;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ call_count = --local->call_count;
+ }
+ UNLOCK (&frame->lock);
+
+ return call_count;
+}
+
+
+/**
+ * up_children_count - return the number of children that are up
+ */
+
+int
+afr_up_children_count (int child_count, unsigned char *child_up)
+{
+ int i = 0;
+ int ret = 0;
+
+ for (i = 0; i < child_count; i++)
+ if (child_up[i])
+ ret++;
+ return ret;
+}
+
+
+int
+afr_locked_nodes_count (unsigned char *locked_nodes, int child_count)
+{
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < child_count; i++)
+ if (locked_nodes[i])
+ ret++;
+
+ return ret;
+}
+
+
+ino64_t
+afr_itransform (ino64_t ino, int child_count, int child_index)
+{
+ ino64_t scaled_ino = -1;
+
+ if (ino == ((uint64_t) -1)) {
+ scaled_ino = ((uint64_t) -1);
+ goto out;
+ }
+
+ scaled_ino = (ino * child_count) + child_index;
+
+out:
+ return scaled_ino;
+}
+
+
+int
+afr_deitransform_orig (ino64_t ino, int child_count)
+{
+ int index = -1;
+
+ index = ino % child_count;
+
+ return index;
+}
+
+
+int
+afr_deitransform (ino64_t ino, int child_count)
+{
+ return 0;
+}
+
+
+int
+afr_self_heal_lookup_unwind (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+
+ local = frame->local;
+
+ if (local->govinda_gOvinda) {
+ afr_set_split_brain (this, local->cont.lookup.inode, _gf_true);
+ }
+
+ AFR_STACK_UNWIND (lookup, frame, local->op_ret, local->op_errno,
+ local->cont.lookup.inode,
+ &local->cont.lookup.buf,
+ local->cont.lookup.xattr,
+ &local->cont.lookup.postparent);
+
+ return 0;
+}
+
+
+static void
+afr_lookup_collect_xattr (afr_local_t *local, xlator_t *this,
+ int child_index, dict_t *xattr)
+{
+ uint32_t open_fd_count = 0;
+ uint32_t inodelk_count = 0;
+ uint32_t entrylk_count = 0;
+
+ int ret = 0;
+
+ if (afr_sh_has_metadata_pending (xattr, child_index, this)) {
+ local->self_heal.need_metadata_self_heal = _gf_true;
+ gf_log(this->name, GF_LOG_DEBUG,
+ "metadata self-heal is pending for %s.",
+ local->loc.path);
+ }
+
+ if (afr_sh_has_entry_pending (xattr, child_index, this)) {
+ local->self_heal.need_entry_self_heal = _gf_true;
+ gf_log(this->name, GF_LOG_DEBUG,
+ "entry self-heal is pending for %s.", local->loc.path);
+ }
+
+ if (afr_sh_has_data_pending (xattr, child_index, this)) {
+ local->self_heal.need_data_self_heal = _gf_true;
+ gf_log(this->name, GF_LOG_DEBUG,
+ "data self-heal is pending for %s.", local->loc.path);
+ }
+
+ ret = dict_get_uint32 (xattr, GLUSTERFS_OPEN_FD_COUNT,
+ &open_fd_count);
+ if (ret == 0)
+ local->open_fd_count += open_fd_count;
+
+ ret = dict_get_uint32 (xattr, GLUSTERFS_INODELK_COUNT,
+ &inodelk_count);
+ if (ret == 0)
+ local->inodelk_count += inodelk_count;
+
+ ret = dict_get_uint32 (xattr, GLUSTERFS_ENTRYLK_COUNT,
+ &entrylk_count);
+ if (ret == 0)
+ local->entrylk_count += entrylk_count;
+}
+
+
+static void
+afr_lookup_self_heal_check (xlator_t *this, afr_local_t *local,
+ struct iatt *buf, struct iatt *lookup_buf)
+{
+ if (FILETYPE_DIFFERS (buf, lookup_buf)) {
+ /* mismatching filetypes with same name
+ */
+
+ gf_log (this->name, GF_LOG_NORMAL,
+ "filetype differs for %s ", local->loc.path);
+
+ local->govinda_gOvinda = 1;
+ }
+
+ if (PERMISSION_DIFFERS (buf, lookup_buf)) {
+ /* mismatching permissions */
+ gf_log (this->name, GF_LOG_NORMAL,
+ "permissions differ for %s ", local->loc.path);
+ local->self_heal.need_metadata_self_heal = _gf_true;
+ }
+
+ if (OWNERSHIP_DIFFERS (buf, lookup_buf)) {
+ /* mismatching permissions */
+ local->self_heal.need_metadata_self_heal = _gf_true;
+ gf_log (this->name, GF_LOG_NORMAL,
+ "ownership differs for %s ", local->loc.path);
+ }
+
+ if (SIZE_DIFFERS (buf, lookup_buf)
+ && IA_ISREG (buf->ia_type)) {
+ gf_log (this->name, GF_LOG_NORMAL,
+ "size differs for %s ", local->loc.path);
+ local->self_heal.need_data_self_heal = _gf_true;
+ }
+
+}
+
+
+static void
+afr_lookup_done (call_frame_t *frame, xlator_t *this, struct iatt *lookup_buf)
+{
+ int unwind = 1;
+ int source = -1;
+ char sh_type_str[256] = {0,};
+
+ afr_local_t *local = NULL;
+
+ local = frame->local;
+
+ local->cont.lookup.postparent.ia_ino = local->cont.lookup.parent_ino;
+
+ if (local->cont.lookup.ino) {
+ local->cont.lookup.buf.ia_ino = local->cont.lookup.ino;
+ local->cont.lookup.buf.ia_gen = local->cont.lookup.gen;
+ }
+
+ if (local->op_ret == 0) {
+ /* KLUDGE: assuming DHT will not itransform in
+ revalidate */
+ if (local->cont.lookup.inode->ino) {
+ local->cont.lookup.buf.ia_ino =
+ local->cont.lookup.inode->ino;
+ local->cont.lookup.buf.ia_gen =
+ local->cont.lookup.inode->generation;
+ }
+ }
+
+ if (local->success_count && local->enoent_count) {
+ local->self_heal.need_metadata_self_heal = _gf_true;
+ local->self_heal.need_data_self_heal = _gf_true;
+ local->self_heal.need_entry_self_heal = _gf_true;
+ gf_log(this->name, GF_LOG_NORMAL,
+ "entries are missing in lookup of %s.",
+ local->loc.path);
+ }
+
+ if (local->success_count) {
+ /* check for split-brain case in previous lookup */
+ if (afr_is_split_brain (this,
+ local->cont.lookup.inode)) {
+ local->self_heal.need_data_self_heal = _gf_true;
+ gf_log(this->name, GF_LOG_NORMAL,
+ "split brain detected during lookup of "
+ "%s.", local->loc.path);
+ }
+ }
+
+ if ((local->self_heal.need_metadata_self_heal
+ || local->self_heal.need_data_self_heal
+ || local->self_heal.need_entry_self_heal)
+ && ((!local->cont.lookup.is_revalidate)
+ || (local->op_ret != -1))) {
+
+ if (local->open_fd_count
+ || local->inodelk_count
+ || local->entrylk_count) {
+
+ /* Someone else is doing self-heal on this file.
+ So just make a best effort to set the read-subvolume
+ and return */
+
+ if (IA_ISREG (local->cont.lookup.inode->ia_type)) {
+ source = afr_self_heal_get_source (this, local, local->cont.lookup.xattrs);
+
+ if (source >= 0) {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ source);
+ }
+ }
+ } else {
+ if (!local->cont.lookup.inode->ia_type) {
+ /* fix for RT #602 */
+ local->cont.lookup.inode->ia_type =
+ lookup_buf->ia_type;
+ }
+
+ local->self_heal.background = _gf_true;
+ local->self_heal.type = local->cont.lookup.buf.ia_type;
+ local->self_heal.unwind = afr_self_heal_lookup_unwind;
+
+ unwind = 0;
+
+ afr_self_heal_type_str_get(&local->self_heal,
+ sh_type_str,
+ sizeof(sh_type_str));
+
+ gf_log (this->name, GF_LOG_NORMAL, "background %s "
+ "self-heal triggered. path: %s",
+ sh_type_str, local->loc.path);
+
+ afr_self_heal (frame, this);
+ }
+ }
+
+ if (unwind) {
+ AFR_STACK_UNWIND (lookup, frame, local->op_ret,
+ local->op_errno,
+ local->cont.lookup.inode,
+ &local->cont.lookup.buf,
+ local->cont.lookup.xattr,
+ &local->cont.lookup.postparent);
+ }
+}
+
+
+/*
+ * During a lookup, some errors are more "important" than
+ * others in that they must be given higher priority while
+ * returning to the user.
+ *
+ * The hierarchy is ESTALE > ENOENT > others
+ *
+ */
+
+static gf_boolean_t
+__error_more_important (int32_t old_errno, int32_t new_errno)
+{
+ gf_boolean_t ret = _gf_true;
+
+ /* Nothing should ever overwrite ESTALE */
+ if (old_errno == ESTALE)
+ ret = _gf_false;
+
+ /* Nothing should overwrite ENOENT, except ESTALE */
+ else if ((old_errno == ENOENT) && (new_errno != ESTALE))
+ ret = _gf_false;
+
+ return ret;
+}
+
+
+int
+afr_fresh_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 *xattr,
+ struct iatt *postparent)
+{
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+ struct iatt * lookup_buf = NULL;
+
+ int call_count = -1;
+ int child_index = -1;
+ int first_up_child = -1;
+
+ child_index = (long) cookie;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ local = frame->local;
+
+ lookup_buf = &local->cont.lookup.buf;
+
+ if (op_ret == -1) {
+ if (op_errno == ENOENT)
+ local->enoent_count++;
+
+ if (__error_more_important (local->op_errno, op_errno))
+ local->op_errno = op_errno;
+
+ if (local->op_errno == ESTALE) {
+ local->op_ret = -1;
+ }
+
+ goto unlock;
+ }
+
+ afr_lookup_collect_xattr (local, this, child_index, xattr);
+
+ first_up_child = afr_first_up_child (priv);
+
+ if (child_index == first_up_child) {
+ local->cont.lookup.ino =
+ afr_itransform (buf->ia_ino,
+ priv->child_count,
+ first_up_child);
+ local->cont.lookup.gen = buf->ia_gen;
+ }
+
+ if (local->success_count == 0) {
+ if (local->op_errno != ESTALE)
+ local->op_ret = op_ret;
+
+ local->cont.lookup.inode = inode_ref (inode);
+ local->cont.lookup.xattr = dict_ref (xattr);
+ local->cont.lookup.xattrs[child_index] = dict_ref (xattr);
+ local->cont.lookup.postparent = *postparent;
+
+ if (priv->first_lookup && inode->ino == 1) {
+ gf_log (this->name, GF_LOG_TRACE,
+ "added root inode");
+ priv->root_inode = inode_ref (inode);
+ priv->first_lookup = 0;
+ priv->child_up[1] = 0;
+
+ LOCK (&priv->lock);
+ {
+ priv->down_count++;
+ }
+ UNLOCK (&priv->lock);
+
+ }
+
+ *lookup_buf = *buf;
+
+ lookup_buf->ia_ino = afr_itransform (buf->ia_ino,
+ priv->child_count,
+ child_index);
+ if (priv->read_child >= 0) {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ priv->read_child);
+ } else {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ child_index);
+ }
+
+ } else {
+ afr_lookup_self_heal_check (this, local, buf, lookup_buf);
+
+ if (child_index == local->read_child_index) {
+ /*
+ lookup has succeeded on the read child.
+ So use its inode number
+ */
+ if (local->cont.lookup.xattr)
+ dict_unref (local->cont.lookup.xattr);
+
+ local->cont.lookup.xattr = dict_ref (xattr);
+ local->cont.lookup.xattrs[child_index] = dict_ref (xattr);
+ local->cont.lookup.postparent = *postparent;
+
+ *lookup_buf = *buf;
+
+ if (priv->read_child >= 0) {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ priv->read_child);
+ } else {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ local->read_child_index);
+ }
+ }
+
+ }
+
+ local->success_count++;
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ afr_lookup_done (frame, this, lookup_buf);
+ }
+
+ return 0;
+}
+
+
+int
+afr_revalidate_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 *xattr,
+ struct iatt *postparent)
+{
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+ struct iatt * lookup_buf = NULL;
+
+ int call_count = -1;
+ int child_index = -1;
+ int first_up_child = -1;
+
+ child_index = (long) cookie;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ local = frame->local;
+
+ lookup_buf = &local->cont.lookup.buf;
+
+ if (op_ret == -1) {
+ if (op_errno == ENOENT)
+ local->enoent_count++;
+
+ if (__error_more_important (local->op_errno, op_errno))
+ local->op_errno = op_errno;
+
+ if (local->op_errno == ESTALE) {
+ local->op_ret = -1;
+ }
+
+ goto unlock;
+ }
+
+ afr_lookup_collect_xattr (local, this, child_index, xattr);
+
+ first_up_child = afr_first_up_child (priv);
+
+ if (child_index == first_up_child) {
+ local->cont.lookup.ino =
+ afr_itransform (buf->ia_ino,
+ priv->child_count,
+ first_up_child);
+ local->cont.lookup.gen = buf->ia_gen;
+ }
+
+ /* in case of revalidate, we need to send stat of the
+ * child whose stat was sent during the first lookup.
+ * (so that time stamp does not vary with revalidate.
+ * in case it is down, stat of the fist success will
+ * be replied */
+
+ /* inode number should be preserved across revalidates */
+
+ if (local->success_count == 0) {
+ if (local->op_errno != ESTALE)
+ local->op_ret = op_ret;
+
+ local->cont.lookup.inode = inode_ref (inode);
+ local->cont.lookup.xattr = dict_ref (xattr);
+ local->cont.lookup.xattrs[child_index] = dict_ref (xattr);
+ local->cont.lookup.postparent = *postparent;
+
+ *lookup_buf = *buf;
+
+ lookup_buf->ia_ino = afr_itransform (buf->ia_ino,
+ priv->child_count,
+ child_index);
+
+ if (priv->read_child >= 0) {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ priv->read_child);
+ } else {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ child_index);
+ }
+
+ } else {
+ afr_lookup_self_heal_check (this, local, buf, lookup_buf);
+
+ if (child_index == local->read_child_index) {
+
+ /*
+ lookup has succeeded on the read child.
+ So use its inode number
+ */
+
+ if (local->cont.lookup.xattr)
+ dict_unref (local->cont.lookup.xattr);
+
+ local->cont.lookup.xattr = dict_ref (xattr);
+ local->cont.lookup.xattrs[child_index] = dict_ref (xattr);
+ local->cont.lookup.postparent = *postparent;
+
+ *lookup_buf = *buf;
+
+ if (priv->read_child >= 0) {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ priv->read_child);
+ } else {
+ afr_set_read_child (this,
+ local->cont.lookup.inode,
+ local->read_child_index);
+ }
+ }
+
+ }
+
+ local->success_count++;
+ }
+unlock:
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ afr_lookup_done (frame, this, lookup_buf);
+ }
+
+ return 0;
+}
+
+
+int
+afr_lookup (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, dict_t *xattr_req)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+ int ret = -1;
+ int i = 0;
+
+ fop_lookup_cbk_t callback;
+
+ int call_count = 0;
+
+ uint64_t ctx;
+
+ int32_t op_errno = 0;
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ local->op_ret = -1;
+
+ frame->local = local;
+
+ if (!strcmp (loc->path, "/" GF_REPLICATE_TRASH_DIR)) {
+ op_errno = ENOENT;
+ goto out;
+ }
+
+ loc_copy (&local->loc, loc);
+
+ ret = inode_ctx_get (loc->inode, this, &ctx);
+ if (ret == 0) {
+ /* lookup is a revalidate */
+
+ callback = afr_revalidate_lookup_cbk;
+
+ local->cont.lookup.is_revalidate = _gf_true;
+ local->read_child_index = afr_read_child (this,
+ loc->inode);
+ } else {
+ callback = afr_fresh_lookup_cbk;
+
+ LOCK (&priv->read_child_lock);
+ {
+ local->read_child_index = (++priv->read_child_rr)
+ % (priv->child_count);
+ }
+ UNLOCK (&priv->read_child_lock);
+ }
+
+ if (loc->parent)
+ local->cont.lookup.parent_ino = loc->parent->ino;
+
+ local->child_up = memdup (priv->child_up, priv->child_count);
+
+ local->cont.lookup.xattrs = GF_CALLOC (priv->child_count,
+ sizeof (*local->cont.lookup.xattr),
+ gf_afr_mt_dict_t);
+
+ local->call_count = afr_up_children_count (priv->child_count,
+ local->child_up);
+ call_count = local->call_count;
+
+ if (local->call_count == 0) {
+ ret = -1;
+ op_errno = ENOTCONN;
+ goto out;
+ }
+
+ /* By default assume ENOTCONN. On success it will be set to 0. */
+ local->op_errno = ENOTCONN;
+
+ if (xattr_req == NULL)
+ local->xattr_req = dict_new ();
+ else
+ local->xattr_req = dict_ref (xattr_req);
+
+ for (i = 0; i < priv->child_count; i++) {
+ ret = dict_set_uint64 (local->xattr_req, priv->pending_key[i],
+ 3 * sizeof(int32_t));
+
+ /* 3 = data+metadata+entry */
+ }
+
+ ret = dict_set_uint64 (local->xattr_req, GLUSTERFS_OPEN_FD_COUNT, 0);
+ ret = dict_set_uint64 (local->xattr_req, GLUSTERFS_INODELK_COUNT, 0);
+ ret = dict_set_uint64 (local->xattr_req, GLUSTERFS_ENTRYLK_COUNT, 0);
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, callback, (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->lookup,
+ loc, local->xattr_req);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ ret = 0;
+out:
+ if (ret == -1)
+ AFR_STACK_UNWIND (lookup, frame, -1, op_errno,
+ NULL, NULL, NULL, NULL);
+
+ return 0;
+}
+
+
+/* {{{ open */
+
+int
+afr_fd_ctx_set (xlator_t *this, fd_t *fd)
+{
+ afr_private_t * priv = NULL;
+
+ int op_ret = 0;
+ int ret = 0;
+
+ uint64_t ctx;
+ afr_fd_ctx_t * fd_ctx = NULL;
+
+ VALIDATE_OR_GOTO (this->private, out);
+ VALIDATE_OR_GOTO (fd, out);
+
+ priv = this->private;
+
+ LOCK (&fd->lock);
+ {
+ ret = __fd_ctx_get (fd, this, &ctx);
+
+ if (ret == 0)
+ goto unlock;
+
+ fd_ctx = GF_CALLOC (1, sizeof (afr_fd_ctx_t),
+ gf_afr_mt_afr_fd_ctx_t);
+ if (!fd_ctx) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Out of memory");
+
+ op_ret = -ENOMEM;
+ goto unlock;
+ }
+
+ fd_ctx->pre_op_done = GF_CALLOC (sizeof (*fd_ctx->pre_op_done),
+ priv->child_count,
+ gf_afr_mt_char);
+ if (!fd_ctx->pre_op_done) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Out of memory");
+ op_ret = -ENOMEM;
+ goto unlock;
+ }
+
+ fd_ctx->opened_on = GF_CALLOC (sizeof (*fd_ctx->opened_on),
+ priv->child_count,
+ gf_afr_mt_char);
+ if (!fd_ctx->opened_on) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Out of memory");
+ op_ret = -ENOMEM;
+ goto unlock;
+ }
+
+ fd_ctx->child_failed = GF_CALLOC (
+ sizeof (*fd_ctx->child_failed),
+ priv->child_count,
+ gf_afr_mt_char);
+
+ if (!fd_ctx->child_failed) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "Out of memory");
+
+ op_ret = -ENOMEM;
+ goto unlock;
+ }
+
+ fd_ctx->up_count = priv->up_count;
+ fd_ctx->down_count = priv->down_count;
+
+ ret = __fd_ctx_set (fd, this, (uint64_t)(long) fd_ctx);
+ if (ret < 0) {
+ op_ret = ret;
+ }
+
+ INIT_LIST_HEAD (&fd_ctx->entries);
+ }
+unlock:
+ UNLOCK (&fd->lock);
+out:
+ return ret;
+}
+
+/* {{{ flush */
+
+int
+afr_flush_unwind (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+ call_frame_t *main_frame = NULL;
+
+ local = frame->local;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ if (local->transaction.main_frame)
+ main_frame = local->transaction.main_frame;
+ local->transaction.main_frame = NULL;
+ }
+ UNLOCK (&frame->lock);
+
+ if (main_frame) {
+ AFR_STACK_UNWIND (flush, main_frame,
+ local->op_ret, local->op_errno);
+ }
+
+ return 0;
+}
+
+
+int
+afr_flush_wind_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+
+ int call_count = -1;
+ int child_index = (long) cookie;
+ int need_unwind = 0;
+
+ local = frame->local;
+ priv = this->private;
+
+ LOCK (&frame->lock);
+ {
+ if (afr_fop_failed (op_ret, op_errno))
+ afr_transaction_fop_failed (frame, this, child_index);
+
+ if (op_ret != -1) {
+ if (local->success_count == 0) {
+ local->op_ret = op_ret;
+ }
+ local->success_count++;
+
+ if (local->success_count == priv->wait_count) {
+ need_unwind = 1;
+ }
+ }
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ if (need_unwind)
+ afr_flush_unwind (frame, this);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ local->transaction.resume (frame, this);
+ }
+
+ return 0;
+}
+
+
+int
+afr_flush_wind (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+
+ int i = 0;
+ int call_count = -1;
+
+ local = frame->local;
+ priv = this->private;
+
+ call_count = afr_up_children_count (priv->child_count, local->child_up);
+
+ if (call_count == 0) {
+ local->transaction.resume (frame, this);
+ return 0;
+ }
+
+ local->call_count = call_count;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, afr_flush_wind_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->flush,
+ local->fd);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+int
+afr_flush_done (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t *local = NULL;
+
+ local = frame->local;
+
+ local->transaction.unwind (frame, this);
+
+ AFR_STACK_DESTROY (frame);
+
+ return 0;
+}
+
+
+int
+afr_plain_flush_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (flush, frame, local->op_ret, local->op_errno);
+
+ return 0;
+}
+
+
+static int
+__no_pre_op_done (xlator_t *this, fd_t *fd)
+{
+ int i = 0;
+ int op_ret = 1;
+
+ int _ret = 0;
+ uint64_t ctx;
+ afr_fd_ctx_t * fd_ctx = NULL;
+
+ afr_private_t *priv = NULL;
+
+ priv = this->private;
+
+ LOCK (&fd->lock);
+ {
+ _ret = __fd_ctx_get (fd, this, &ctx);
+
+ if (_ret < 0) {
+ goto out;
+ }
+
+ fd_ctx = (afr_fd_ctx_t *)(long) ctx;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (fd_ctx->pre_op_done[i]) {
+ op_ret = 0;
+ break;
+ }
+ }
+ }
+out:
+ UNLOCK (&fd->lock);
+
+ return op_ret;
+}
+
+
+int
+afr_flush (call_frame_t *frame, xlator_t *this, fd_t *fd)
+{
+ afr_private_t * priv = NULL;
+ afr_local_t * local = NULL;
+
+ call_frame_t * transaction_frame = NULL;
+
+ int ret = -1;
+
+ int op_ret = -1;
+ int op_errno = 0;
+
+ int i = 0;
+ int call_count = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = afr_up_children_count (priv->child_count, local->child_up);
+
+ if (__no_pre_op_done (this, fd)) {
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, afr_plain_flush_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->flush,
+ fd);
+ if (!--call_count)
+ break;
+ }
+ }
+ } else {
+ transaction_frame = copy_frame (frame);
+ if (!transaction_frame) {
+ op_errno = ENOMEM;
+ gf_log (this->name, GF_LOG_ERROR,
+ "Out of memory.");
+ goto out;
+ }
+
+ transaction_frame->local = local;
+
+ local->op = GF_FOP_FLUSH;
+
+ local->transaction.fop = afr_flush_wind;
+ local->transaction.done = afr_flush_done;
+ local->transaction.unwind = afr_flush_unwind;
+
+ local->fd = fd_ref (fd);
+
+ local->transaction.main_frame = frame;
+ local->transaction.start = 0;
+ local->transaction.len = 0;
+
+ afr_transaction (transaction_frame, this, AFR_FLUSH_TRANSACTION);
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ if (transaction_frame)
+ AFR_STACK_DESTROY (transaction_frame);
+
+ AFR_STACK_UNWIND (flush, frame, op_ret, op_errno);
+ }
+
+ return 0;
+}
+
+/* }}} */
+
+
+int
+afr_cleanup_fd_ctx (xlator_t *this, fd_t *fd)
+{
+ uint64_t ctx = 0;
+ afr_fd_ctx_t *fd_ctx = NULL;
+ int ret = 0;
+
+ ret = fd_ctx_get (fd, this, &ctx);
+
+ if (ret < 0)
+ goto out;
+
+ fd_ctx = (afr_fd_ctx_t *)(long) ctx;
+
+ if (fd_ctx) {
+ if (fd_ctx->child_failed)
+ GF_FREE (fd_ctx->child_failed);
+
+ if (fd_ctx->pre_op_done)
+ GF_FREE (fd_ctx->pre_op_done);
+
+ if (fd_ctx->opened_on)
+ GF_FREE (fd_ctx->opened_on);
+
+ GF_FREE (fd_ctx);
+ }
+
+out:
+ return 0;
+}
+
+
+int
+afr_release (xlator_t *this, fd_t *fd)
+{
+ afr_cleanup_fd_ctx (this, fd);
+
+ return 0;
+}
+
+
+/* {{{ fsync */
+
+int
+afr_fsync_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
+ struct iatt *postbuf)
+{
+ afr_local_t *local = NULL;
+
+ int call_count = -1;
+
+ int child_index = (long) cookie;
+ int read_child = 0;
+
+ local = frame->local;
+
+ read_child = afr_read_child (this, local->fd->inode);
+
+ LOCK (&frame->lock);
+ {
+ if (child_index == read_child) {
+ local->read_child_returned = _gf_true;
+ }
+
+ if (op_ret == 0) {
+ local->op_ret = 0;
+
+ if (local->success_count == 0) {
+ local->cont.fsync.prebuf = *prebuf;
+ local->cont.fsync.postbuf = *postbuf;
+ }
+
+ if (child_index == read_child) {
+ local->cont.fsync.prebuf = *prebuf;
+ local->cont.fsync.postbuf = *postbuf;
+ }
+
+ local->success_count++;
+ }
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0) {
+ local->cont.fsync.prebuf.ia_ino = local->cont.fsync.ino;
+ local->cont.fsync.postbuf.ia_ino = local->cont.fsync.ino;
+
+ AFR_STACK_UNWIND (fsync, frame, local->op_ret, local->op_errno,
+ &local->cont.fsync.prebuf,
+ &local->cont.fsync.postbuf);
+ }
+
+ return 0;
+}
+
+
+int
+afr_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ int32_t datasync)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ local->fd = fd_ref (fd);
+ local->cont.fsync.ino = fd->inode->ino;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND_COOKIE (frame, afr_fsync_cbk,
+ (void *) (long) i,
+ priv->children[i],
+ priv->children[i]->fops->fsync,
+ fd, datasync);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (fsync, frame, op_ret, op_errno, NULL, NULL);
+ }
+ return 0;
+}
+
+/* }}} */
+
+/* {{{ fsync */
+
+int32_t
+afr_fsyncdir_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (fsyncdir, frame, local->op_ret,
+ local->op_errno);
+
+ return 0;
+}
+
+
+int32_t
+afr_fsyncdir (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ int32_t datasync)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_fsyncdir_cbk,
+ priv->children[i],
+ priv->children[i]->fops->fsyncdir,
+ fd, datasync);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (fsyncdir, frame, op_ret, op_errno);
+ }
+ return 0;
+}
+
+/* }}} */
+
+/* {{{ xattrop */
+
+int32_t
+afr_xattrop_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;
+
+ int call_count = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (xattrop, frame, local->op_ret, local->op_errno,
+ xattr);
+
+ return 0;
+}
+
+
+int32_t
+afr_xattrop (call_frame_t *frame, xlator_t *this, loc_t *loc,
+ gf_xattrop_flags_t optype, dict_t *xattr)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_xattrop_cbk,
+ priv->children[i],
+ priv->children[i]->fops->xattrop,
+ loc, optype, xattr);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (xattrop, frame, op_ret, op_errno, NULL);
+ }
+ return 0;
+}
+
+/* }}} */
+
+/* {{{ fxattrop */
+
+int32_t
+afr_fxattrop_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;
+
+ int call_count = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (fxattrop, frame, local->op_ret, local->op_errno,
+ xattr);
+
+ return 0;
+}
+
+
+int32_t
+afr_fxattrop (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ gf_xattrop_flags_t optype, dict_t *xattr)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_fxattrop_cbk,
+ priv->children[i],
+ priv->children[i]->fops->fxattrop,
+ fd, optype, xattr);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (fxattrop, frame, op_ret, op_errno, NULL);
+ }
+ return 0;
+}
+
+/* }}} */
+
+
+int32_t
+afr_inodelk_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (inodelk, frame, local->op_ret,
+ local->op_errno);
+
+ return 0;
+}
+
+
+int32_t
+afr_inodelk (call_frame_t *frame, xlator_t *this,
+ const char *volume, loc_t *loc, int32_t cmd, struct flock *flock)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_inodelk_cbk,
+ priv->children[i],
+ priv->children[i]->fops->inodelk,
+ volume, loc, cmd, flock);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (inodelk, frame, op_ret, op_errno);
+ }
+ return 0;
+}
+
+
+int32_t
+afr_finodelk_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (finodelk, frame, local->op_ret,
+ local->op_errno);
+
+ return 0;
+}
+
+
+int32_t
+afr_finodelk (call_frame_t *frame, xlator_t *this,
+ const char *volume, fd_t *fd, int32_t cmd, struct flock *flock)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_finodelk_cbk,
+ priv->children[i],
+ priv->children[i]->fops->finodelk,
+ volume, fd, cmd, flock);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (finodelk, frame, op_ret, op_errno);
+ }
+ return 0;
+}
+
+
+int32_t
+afr_entrylk_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (entrylk, frame, local->op_ret,
+ local->op_errno);
+
+ return 0;
+}
+
+
+int32_t
+afr_entrylk (call_frame_t *frame, xlator_t *this,
+ const char *volume, loc_t *loc,
+ const char *basename, entrylk_cmd cmd, entrylk_type type)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_entrylk_cbk,
+ priv->children[i],
+ priv->children[i]->fops->entrylk,
+ volume, loc, basename, cmd, type);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (entrylk, frame, op_ret, op_errno);
+ }
+ return 0;
+}
+
+
+
+int32_t
+afr_fentrylk_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 = -1;
+
+ local = frame->local;
+
+ LOCK (&frame->lock);
+ {
+ if (op_ret == 0)
+ local->op_ret = 0;
+
+ local->op_errno = op_errno;
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (fentrylk, frame, local->op_ret,
+ local->op_errno);
+
+ return 0;
+}
+
+
+int32_t
+afr_fentrylk (call_frame_t *frame, xlator_t *this,
+ const char *volume, fd_t *fd,
+ const char *basename, entrylk_cmd cmd, entrylk_type type)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int ret = -1;
+
+ int i = 0;
+ int32_t call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ call_count = local->call_count;
+ frame->local = local;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_fentrylk_cbk,
+ priv->children[i],
+ priv->children[i]->fops->fentrylk,
+ volume, fd, basename, cmd, type);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (fentrylk, frame, op_ret, op_errno);
+ }
+ return 0;
+}
+
+int32_t
+afr_statfs_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ struct statvfs *statvfs)
+{
+ afr_local_t *local = NULL;
+
+ int call_count = 0;
+
+ LOCK (&frame->lock);
+ {
+ local = frame->local;
+
+ if (op_ret == 0) {
+ local->op_ret = op_ret;
+
+ if (local->cont.statfs.buf_set) {
+ if (statvfs->f_bavail < local->cont.statfs.buf.f_bavail)
+ local->cont.statfs.buf = *statvfs;
+ } else {
+ local->cont.statfs.buf = *statvfs;
+ local->cont.statfs.buf_set = 1;
+ }
+ }
+
+ if (op_ret == -1)
+ local->op_errno = op_errno;
+
+ }
+ UNLOCK (&frame->lock);
+
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (statfs, frame, local->op_ret, local->op_errno,
+ &local->cont.statfs.buf);
+
+ return 0;
+}
+
+
+int32_t
+afr_statfs (call_frame_t *frame, xlator_t *this,
+ loc_t *loc)
+{
+ afr_private_t * priv = NULL;
+ int child_count = 0;
+ afr_local_t * local = NULL;
+ int i = 0;
+
+ int ret = -1;
+ int call_count = 0;
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+ VALIDATE_OR_GOTO (loc, out);
+
+ priv = this->private;
+ child_count = priv->child_count;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+
+ ret = AFR_LOCAL_INIT (local, priv);
+ if (ret < 0) {
+ op_errno = -ret;
+ goto out;
+ }
+
+ frame->local = local;
+ call_count = local->call_count;
+
+ for (i = 0; i < child_count; i++) {
+ if (local->child_up[i]) {
+ STACK_WIND (frame, afr_statfs_cbk,
+ priv->children[i],
+ priv->children[i]->fops->statfs,
+ loc);
+ if (!--call_count)
+ break;
+ }
+ }
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (statfs, frame, op_ret, op_errno, NULL);
+ }
+ return 0;
+}
+
+
+int32_t
+afr_lk_unlock_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct flock *lock)
+{
+ afr_local_t * local = NULL;
+
+ int call_count = -1;
+
+ local = frame->local;
+ call_count = afr_frame_return (frame);
+
+ if (call_count == 0)
+ AFR_STACK_UNWIND (lk, frame, local->op_ret, local->op_errno,
+ lock);
+
+ return 0;
+}
+
+
+int32_t
+afr_lk_unlock (call_frame_t *frame, xlator_t *this)
+{
+ afr_local_t * local = NULL;
+ afr_private_t * priv = NULL;
+
+ int i;
+ int call_count = 0;
+
+ local = frame->local;
+ priv = this->private;
+
+ call_count = afr_locked_nodes_count (local->cont.lk.locked_nodes,
+ priv->child_count);
+
+ if (call_count == 0) {
+ AFR_STACK_UNWIND (lk, frame, local->op_ret, local->op_errno,
+ &local->cont.lk.flock);
+ return 0;
+ }
+
+ local->call_count = call_count;
+
+ local->cont.lk.flock.l_type = F_UNLCK;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if (local->cont.lk.locked_nodes[i]) {
+ STACK_WIND (frame, afr_lk_unlock_cbk,
+ priv->children[i],
+ priv->children[i]->fops->lk,
+ local->fd, F_SETLK,
+ &local->cont.lk.flock);
+
+ if (!--call_count)
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+int32_t
+afr_lk_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct flock *lock)
+{
+ afr_local_t *local = NULL;
+ afr_private_t *priv = NULL;
+
+ int call_count = -1;
+ int child_index = -1;
+
+ local = frame->local;
+ priv = this->private;
+
+ child_index = (long) cookie;
+
+ call_count = --local->call_count;
+
+ if (!child_went_down (op_ret, op_errno) && (op_ret == -1)) {
+ local->op_ret = -1;
+ local->op_errno = op_errno;
+
+ afr_lk_unlock (frame, this);
+ return 0;
+ }
+
+ if (op_ret == 0) {
+ local->op_ret = 0;
+ local->op_errno = 0;
+ local->cont.lk.locked_nodes[child_index] = 1;
+ local->cont.lk.flock = *lock;
+ }
+
+ child_index++;
+
+ if (child_index < priv->child_count) {
+ STACK_WIND_COOKIE (frame, afr_lk_cbk, (void *) (long) child_index,
+ priv->children[child_index],
+ priv->children[child_index]->fops->lk,
+ local->fd, local->cont.lk.cmd,
+ &local->cont.lk.flock);
+ } else if (local->op_ret == -1) {
+ /* all nodes have gone down */
+
+ AFR_STACK_UNWIND (lk, frame, -1, ENOTCONN, &local->cont.lk.flock);
+ } else {
+ /* locking has succeeded on all nodes that are up */
+
+ AFR_STACK_UNWIND (lk, frame, local->op_ret, local->op_errno,
+ &local->cont.lk.flock);
+ }
+
+ return 0;
+}
+
+
+int
+afr_lk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int32_t cmd,
+ struct flock *flock)
+{
+ afr_private_t *priv = NULL;
+ afr_local_t *local = NULL;
+
+ int i = 0;
+
+ int32_t op_ret = -1;
+ int32_t op_errno = 0;
+
+ VALIDATE_OR_GOTO (frame, out);
+ VALIDATE_OR_GOTO (this, out);
+ VALIDATE_OR_GOTO (this->private, out);
+
+ priv = this->private;
+
+ ALLOC_OR_GOTO (local, afr_local_t, out);
+ AFR_LOCAL_INIT (local, priv);
+
+ frame->local = local;
+
+ local->cont.lk.locked_nodes = GF_CALLOC (priv->child_count,
+ sizeof (*local->cont.lk.locked_nodes),
+ gf_afr_mt_char);
+
+ if (!local->cont.lk.locked_nodes) {
+ gf_log (this->name, GF_LOG_ERROR, "Out of memory");
+ op_errno = ENOMEM;
+ goto out;
+ }
+
+ local->fd = fd_ref (fd);
+ local->cont.lk.cmd = cmd;
+ local->cont.lk.flock = *flock;
+
+ STACK_WIND_COOKIE (frame, afr_lk_cbk, (void *) (long) 0,
+ priv->children[i],
+ priv->children[i]->fops->lk,
+ fd, cmd, flock);
+
+ op_ret = 0;
+out:
+ if (op_ret == -1) {
+ AFR_STACK_UNWIND (lk, frame, op_ret, op_errno, NULL);
+ }
+ return 0;
+}
+
+int
+afr_priv_dump (xlator_t *this)
+{
+ afr_private_t *priv = NULL;
+ char key_prefix[GF_DUMP_MAX_BUF_LEN];
+ char key[GF_DUMP_MAX_BUF_LEN];
+ int i = 0;
+
+
+ assert(this);
+ priv = this->private;
+
+ assert(priv);
+ snprintf(key_prefix, GF_DUMP_MAX_BUF_LEN, "%s.%s", this->type, this->name);
+ gf_proc_dump_add_section(key_prefix);
+ gf_proc_dump_build_key(key, key_prefix, "child_count");
+ gf_proc_dump_write(key, "%u", priv->child_count);
+ gf_proc_dump_build_key(key, key_prefix, "read_child_rr");
+ gf_proc_dump_write(key, "%u", priv->read_child_rr);
+ for (i = 0; i < priv->child_count; i++) {
+ gf_proc_dump_build_key(key, key_prefix, "child_up[%d]", i);
+ gf_proc_dump_write(key, "%d", priv->child_up[i]);
+ gf_proc_dump_build_key(key, key_prefix,
+ "pending_key[%d]", i);
+ gf_proc_dump_write(key, "%s", priv->pending_key[i]);
+ }
+ gf_proc_dump_build_key(key, key_prefix, "data_self_heal");
+ gf_proc_dump_write(key, "%d", priv->data_self_heal);
+ gf_proc_dump_build_key(key, key_prefix, "metadata_self_heal");
+ gf_proc_dump_write(key, "%d", priv->metadata_self_heal);
+ gf_proc_dump_build_key(key, key_prefix, "entry_self_heal");
+ gf_proc_dump_write(key, "%d", priv->entry_self_heal);
+ gf_proc_dump_build_key(key, key_prefix, "data_change_log");
+ gf_proc_dump_write(key, "%d", priv->data_change_log);
+ gf_proc_dump_build_key(key, key_prefix, "metadata_change_log");
+ gf_proc_dump_write(key, "%d", priv->metadata_change_log);
+ gf_proc_dump_build_key(key, key_prefix, "entry_change_log");
+ gf_proc_dump_write(key, "%d", priv->entry_change_log);
+ gf_proc_dump_build_key(key, key_prefix, "read_child");
+ gf_proc_dump_write(key, "%d", priv->read_child);
+ gf_proc_dump_build_key(key, key_prefix, "favorite_child");
+ gf_proc_dump_write(key, "%u", priv->favorite_child);
+ gf_proc_dump_build_key(key, key_prefix, "data_lock_server_count");
+ gf_proc_dump_write(key, "%u", priv->data_lock_server_count);
+ gf_proc_dump_build_key(key, key_prefix, "metadata_lock_server_count");
+ gf_proc_dump_write(key, "%u", priv->metadata_lock_server_count);
+ gf_proc_dump_build_key(key, key_prefix, "entry_lock_server_count");
+ gf_proc_dump_write(key, "%u", priv->entry_lock_server_count);
+ gf_proc_dump_build_key(key, key_prefix, "wait_count");
+ gf_proc_dump_write(key, "%u", priv->wait_count);
+
+ return 0;
+}
+
+
+/**
+ * find_child_index - find the child's index in the array of subvolumes
+ * @this: AFR
+ * @child: child
+ */
+
+static int
+find_child_index (xlator_t *this, xlator_t *child)
+{
+ afr_private_t *priv = NULL;
+
+ int i = -1;
+
+ priv = this->private;
+
+ for (i = 0; i < priv->child_count; i++) {
+ if ((xlator_t *) child == priv->children[i])
+ break;
+ }
+
+ return i;
+}
+
+int32_t
+afr_notify (xlator_t *this, int32_t event,
+ void *data, ...)
+{
+ afr_private_t * priv = NULL;
+ unsigned char * child_up = NULL;
+
+ int i = -1;
+ int up_children = 0;
+
+ priv = this->private;
+
+ if (!priv)
+ return 0;
+
+ child_up = priv->child_up;
+
+ switch (event) {
+ case GF_EVENT_CHILD_UP:
+ i = find_child_index (this, data);
+
+ child_up[i] = 1;
+
+ LOCK (&priv->lock);
+ {
+ priv->up_count++;
+ }
+ UNLOCK (&priv->lock);
+
+ /*
+ if all the children were down, and one child came up,
+ send notify to parent
+ */
+
+ for (i = 0; i < priv->child_count; i++)
+ if (child_up[i])
+ up_children++;
+
+ if (up_children == 1) {
+ gf_log (this->name, GF_LOG_NORMAL,
+ "Subvolume '%s' came back up; "
+ "going online.", ((xlator_t *)data)->name);
+
+ default_notify (this, event, data);
+ }
+
+ break;
+
+ case GF_EVENT_CHILD_DOWN:
+ i = find_child_index (this, data);
+
+ child_up[i] = 0;
+
+ LOCK (&priv->lock);
+ {
+ priv->down_count++;
+ }
+ UNLOCK (&priv->lock);
+
+ /*
+ if all children are down, and this was the last to go down,
+ send notify to parent
+ */
+
+ for (i = 0; i < priv->child_count; i++)
+ if (child_up[i])
+ up_children++;
+
+ if (up_children == 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "All subvolumes are down. Going offline "
+ "until atleast one of them comes back up.");
+
+ default_notify (this, event, data);
+ }
+
+ break;
+
+ default:
+ default_notify (this, event, data);
+ }
+
+ return 0;
+
+}