cluster/afr: Do not increment healed_count if no healing was performed

        Backport of: http://review.gluster.org/9713

PROBLEM:
When file modifications are happening while index heal is launched,
index healer could pick up entries which appeared in indices/xattrop
transiently during the course of the operations on the mount point, and
do not really need any heal. This will cause index healer to keep doing
index-heal in a loop as long as it finds this entry, by believing that
it did successfully heal some gfids even when it didn't.

FIX:
afr_selfheal() now returns a 1 to indicate that it did not (need to)
heal a given gfid. afr_shd_selfheal() will not increment healed_count
whenever afr_selfheal() returns a 1.

Change-Id: I9158c814419b635fac3dfe2fe40c94d1548ea4e8
BUG: 1194306
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/9852
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-by: Anuradha Talur <atalur@redhat.com>
Reviewed-by: Raghavendra Bhat <raghavendra@redhat.com>

1 files changed, 13 insertions, 2 deletions

diff --git a/xlators/cluster/afr/src/afr-self-heal-entry.c b/xlators/cluster/afr/src/afr-self-heal-entry.c
index 6af9488f9a4..13825e1ebad 100644
--- a/xlators/cluster/afr/src/afr-self-heal-entry.c
+++ b/xlators/cluster/afr/src/afr-self-heal-entry.c
@@ -578,6 +578,7 @@ __afr_selfheal_entry (call_frame_t *frame, xlator_t *this, fd_t *fd,
 	unsigned char          *healed_sinks          = NULL;
 	struct afr_reply       *locked_replies        = NULL;
 	afr_private_t          *priv                  = NULL;
+        gf_boolean_t            did_sh                = _gf_true;
 
 	priv = this->private;
 
@@ -606,6 +607,10 @@ __afr_selfheal_entry (call_frame_t *frame, xlator_t *this, fd_t *fd,
                                                     data_lock, sources, sinks,
                                                     healed_sinks,
 						    locked_replies, &source);
+                if (AFR_COUNT(healed_sinks, priv->child_count) == 0) {
+                        did_sh = _gf_false;
+                        goto unlock;
+                }
 	}
 unlock:
 	afr_selfheal_unentrylk (frame, this, fd->inode, this->name, NULL,
@@ -613,6 +618,9 @@ unlock:
 	if (ret < 0)
 		goto out;
 
+        if (!did_sh)
+                goto out;
+
 	ret = afr_selfheal_entry_do (frame, this, fd, source, sources,
                                      healed_sinks);
 	if (ret)
@@ -648,8 +656,11 @@ postop_unlock:
         afr_selfheal_unentrylk (frame, this, fd->inode, this->name, NULL,
                                 postop_lock);
 out:
-        afr_log_selfheal (fd->inode->gfid, this, ret, "entry", source,
-                          healed_sinks);
+        if (did_sh)
+                afr_log_selfheal (fd->inode->gfid, this, ret, "entry", source,
+                                  healed_sinks);
+        else
+                ret = 1;
 
         if (locked_replies)
                 afr_replies_wipe (locked_replies, priv->child_count);