cluster/afr : Fix self-heal of special files

Fixes self-heal of special files like device files, fifo files, socket files
etc. Does it by doing the following:
* Prevent setting of pending data xattr on a special file during entry self-heal
  when a new fils is created.
* Allow data self-heal to be started on all file types other than directories.
  During data self-heal, for special files just erase pending xattrs, if those
  xattrs were set by previous releases of glusterfs.

Change-Id: I34d8121e23ad00e85371ae2a36ef30cf3bd5db7a
BUG: 3525
Reviewed-on: http://review.gluster.com/618
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pranith Kumar Karampuri <pranithk@gluster.com>

1 files changed, 33 insertions, 1 deletions

diff --git a/xlators/cluster/afr/src/afr-self-heal-data.c b/xlators/cluster/afr/src/afr-self-heal-data.c
index 216017cbb17..97d578c9b8c 100644
--- a/xlators/cluster/afr/src/afr-self-heal-data.c
+++ b/xlators/cluster/afr/src/afr-self-heal-data.c
@@ -366,6 +366,10 @@ afr_sh_data_erase_pending_cbk (call_frame_t *frame, void *cookie,
         if (call_count == 0) {
                 local = frame->local;
                 sh = &local->self_heal;
+                if (!IA_ISREG (sh->type)) {
+                        afr_sh_data_finish (frame, this);
+                        goto out;
+                }
                 if (NULL == sh->old_loop_frame) {
                         GF_ASSERT (sh->data_lock_held);
                         afr_sh_data_fxattrop (frame, this,
@@ -850,6 +854,27 @@ out:
 }
 
 int
+afr_sh_data_special_file_fix (call_frame_t *frame, xlator_t *this)
+{
+        afr_private_t   *priv = NULL;
+        afr_self_heal_t *sh = NULL;
+        afr_local_t     *local = NULL;
+        int             i = 0;
+
+        local = frame->local;
+        sh = &local->self_heal;
+        priv = this->private;
+
+        for (i = 0; i < priv->child_count ; i++)
+                if (1 == local->child_up[i])
+                        sh->success[i] = 1;
+
+        afr_sh_data_erase_pending (frame, this);
+
+        return 0;
+}
+
+int
 afr_sh_data_fstat_cbk (call_frame_t *frame, void *cookie,
                        xlator_t *this, int32_t op_ret, int32_t op_errno,
                        struct iatt *buf)
@@ -882,7 +907,14 @@ afr_sh_data_fstat_cbk (call_frame_t *frame, void *cookie,
         call_count = afr_frame_return (frame);
 
         if (call_count == 0) {
-                afr_sh_data_fix (frame, this);
+                /* Previous versions of glusterfs might have set
+                 * the pending data xattrs which need to be erased
+                 */
+                if (IA_ISREG (buf->ia_type))
+                        afr_sh_data_fix (frame, this);
+                else
+                        afr_sh_data_special_file_fix (frame, this);
+
         }
 
         return 0;