features/index: Ignore regular files when examining state of the inode wrt ENTRY_CHANGES

	Backport of: http://review.gluster.org/14870

This prevents unnecessary sys_lstat() syscall when xattrop
is operating on regular files.

Also, to avoid (even) the one-time execution of sys_lstat()
syscalls on disperse volumes or replicate volumes when granular
entry self-heal is disabled, we pass a key in afr_selfheal_undo_pending()
indicating to index that this xattrop is on a granular directory index.
Index will accordingly decide whether or not to attempt the index state
initialization.

Change-Id: I86b69e83b6216c3371d997a4983d75d4be6a28b2
BUG: 1355609
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/14921
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

1 files changed, 22 insertions, 11 deletions

diff --git a/xlators/features/index/src/index.c b/xlators/features/index/src/index.c
index 4f431648913..7b8713c89ef 100644
--- a/xlators/features/index/src/index.c
+++ b/xlators/features/index/src/index.c
@@ -945,6 +945,7 @@ xattrop_index_action (xlator_t *this, index_local_t *local, dict_t *xattr,
         int              i                       = 0;
         int            ret                       = 0;
         int            zfilled[XATTROP_TYPE_END] = {0,};
+        int8_t         value                     = 0;
         char          *subdir                    = NULL;
         dict_t        *req_xdata                 = NULL;
         inode_t       *inode                     = NULL;
@@ -959,22 +960,32 @@ xattrop_index_action (xlator_t *this, index_local_t *local, dict_t *xattr,
                                   _check_key_is_zero_filled, zfilled);
         _index_action (this, inode, zfilled);
 
-        if (req_xdata)
+        if (req_xdata) {
                 ret = index_entry_action (this, inode, req_xdata,
                                           GF_XATTROP_ENTRY_OUT_KEY);
 
-        if (zfilled[XATTROP] == 1) {
-                subdir = index_get_subdir_from_type (ENTRY_CHANGES);
-                ret = index_inode_ctx_get (inode, this, &ctx);
-                if (ctx->state[ENTRY_CHANGES] == UNKNOWN)
-                        index_init_state (this, inode, ctx, subdir);
-                if (ctx->state[ENTRY_CHANGES] == IN) {
-                        ret = index_del (this, inode->gfid, subdir,
-                                         ENTRY_CHANGES);
-                        ctx->state[ENTRY_CHANGES] = NOTIN;
-                }
+                ret = dict_get_int8 (req_xdata, GF_XATTROP_PURGE_INDEX, &value);
+                if ((ret) || (value == 0))
+                        goto out;
+        }
+
+        if (zfilled[XATTROP] != 1)
+                goto out;
+
+        if (inode->ia_type != IA_IFDIR)
+                goto out;
+
+        subdir = index_get_subdir_from_type (ENTRY_CHANGES);
+        ret = index_inode_ctx_get (inode, this, &ctx);
+        if (ctx->state[ENTRY_CHANGES] == UNKNOWN)
+                index_init_state (this, inode, ctx, subdir);
+        if (ctx->state[ENTRY_CHANGES] == IN) {
+                ret = index_del (this, inode->gfid, subdir,
+                                 ENTRY_CHANGES);
+                ctx->state[ENTRY_CHANGES] = NOTIN;
         }
 
+out:
         return;
 }