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authorPranith Kumar K <pkarampu@redhat.com>2013-03-08 15:20:22 +0530
committerVijay Bellur <vbellur@redhat.com>2013-03-12 08:08:52 -0700
commit35660032d6549a519c3fd72d9e2044ff22614b38 (patch)
tree0b716d88bce09ad6048d81899069b37b4b244693 /xlators/cluster
parente125e2ae61c31da798ea9a7342ea9292f47c1d6b (diff)
cluster/afr: Preserve mtime in self-heal
Problem: Data self-heal may choose sink iatt to set mtimes. This happens because after syncing of data is done self-heal does one more xattrops/fstat to determine sources sinks to set the inode-ctx. Since this is done after data syncing and erase of xattrs, old source and old sink are now sources, but the mtimes of them differ. Old code just takes the first source from the list and update mtimes, which could be sink before the self-heal started. Fix: Set mtime from 'sources before syncing'. Change-Id: Id769e1b99aa4f041eaee775f64cbf2c57b799723 BUG: 918437 Signed-off-by: Pranith Kumar K <pkarampu@redhat.com> Reviewed-on: http://review.gluster.org/4658 Reviewed-by: Jeff Darcy <jdarcy@redhat.com> Tested-by: Gluster Build System <jenkins@build.gluster.com>
Diffstat (limited to 'xlators/cluster')
-rw-r--r--xlators/cluster/afr/src/afr-self-heal-data.c39
1 files changed, 25 insertions, 14 deletions
diff --git a/xlators/cluster/afr/src/afr-self-heal-data.c b/xlators/cluster/afr/src/afr-self-heal-data.c
index 69e650620e9..cfc00a3728e 100644
--- a/xlators/cluster/afr/src/afr-self-heal-data.c
+++ b/xlators/cluster/afr/src/afr-self-heal-data.c
@@ -190,29 +190,20 @@ afr_sh_data_setattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
}
int
-afr_sh_data_setattr (call_frame_t *frame, xlator_t *this)
+afr_sh_data_setattr (call_frame_t *frame, xlator_t *this, struct iatt* stbuf)
{
afr_local_t *local = NULL;
afr_private_t *priv = NULL;
afr_self_heal_t *sh = NULL;
int i = 0;
int call_count = 0;
- int source = 0;
int32_t valid = 0;
- struct iatt stbuf = {0,};
local = frame->local;
sh = &local->self_heal;
priv = this->private;
- source = sh->source;
-
- valid |= (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME);
-
- stbuf.ia_atime = sh->buf[source].ia_atime;
- stbuf.ia_atime_nsec = sh->buf[source].ia_atime_nsec;
- stbuf.ia_mtime = sh->buf[source].ia_mtime;
- stbuf.ia_mtime_nsec = sh->buf[source].ia_mtime_nsec;
+ valid = (GF_SET_ATTR_ATIME | GF_SET_ATTR_MTIME);
call_count = afr_set_elem_count_get (sh->success,
priv->child_count);
@@ -232,7 +223,7 @@ afr_sh_data_setattr (call_frame_t *frame, xlator_t *this)
(void *) (long) i,
priv->children[i],
priv->children[i]->fops->setattr,
- &local->loc, &stbuf, valid, NULL);
+ &local->loc, stbuf, valid, NULL);
if (!--call_count)
break;
@@ -256,7 +247,7 @@ afr_sh_data_setattr_fstat_cbk (call_frame_t *frame, void *cookie,
GF_ASSERT (sh->source == child_index);
if (op_ret != -1) {
sh->buf[child_index] = *buf;
- afr_sh_data_setattr (frame, this);
+ afr_sh_data_setattr (frame, this, buf);
} else {
gf_log (this->name, GF_LOG_ERROR, "%s: Failed to set "
"time-stamps after self-heal", local->loc.path);
@@ -683,6 +674,9 @@ afr_sh_data_fxattrop_fstat_done (call_frame_t *frame, xlator_t *this)
afr_private_t *priv = NULL;
int nsources = 0;
int ret = 0;
+ int *old_sources = NULL;
+ int tstamp_source = 0;
+ int i = 0;
local = frame->local;
sh = &local->self_heal;
@@ -690,6 +684,13 @@ afr_sh_data_fxattrop_fstat_done (call_frame_t *frame, xlator_t *this)
gf_log (this->name, GF_LOG_DEBUG, "Pending matrix for: %s",
lkowner_utoa (&frame->root->lk_owner));
+ if (sh->sync_done) {
+ //store sources before sync so that mtime can be set using the
+ //iatt buf from one of them.
+ old_sources = alloca (priv->child_count*sizeof (*old_sources));
+ memcpy (old_sources, sh->sources,
+ priv->child_count * sizeof (*old_sources));
+ }
nsources = afr_build_sources (this, sh->xattr, sh->buf, sh->pending_matrix,
sh->sources, sh->success_children,
@@ -720,6 +721,7 @@ afr_sh_data_fxattrop_fstat_done (call_frame_t *frame, xlator_t *this)
}
afr_set_split_brain (this, sh->inode, DONT_KNOW, NO_SPB);
+
ret = afr_sh_inode_set_read_ctx (sh, this);
if (ret) {
gf_log (this->name, GF_LOG_DEBUG,
@@ -730,7 +732,16 @@ afr_sh_data_fxattrop_fstat_done (call_frame_t *frame, xlator_t *this)
}
if (sh->sync_done) {
- afr_sh_data_setattr (frame, this);
+ /* Perform setattr from one of the old_sources if possible
+ * Because only they have the correct mtime, the new sources
+ * (i.e. old sinks) have mtime from last writev in sync.
+ */
+ tstamp_source = sh->source;
+ for (i = 0; i < priv->child_count; i++) {
+ if (old_sources[i] && sh->sources[i])
+ tstamp_source = i;
+ }
+ afr_sh_data_setattr (frame, this, &sh->buf[tstamp_source]);
} else {
if (nsources == 0) {
gf_log (this->name, GF_LOG_DEBUG,