cluster/afr: Refactored the data self-heal algorithm.

Refactored the operation of the data self-heal algorithm
as:

* open all fd's (if fd not supplied by caller)
* lock 0-0 (if lock not supplied by caller)
* fxattrop, fstat (instead of lookup)
   ... self heal ...
* unlock (if lock not supplied by caller)
* close (if fd not supplied by caller).

Signed-off-by: Vikas Gorur <vikas@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 170 (Auto-heal fails on files that are open()-ed/mmap()-ed)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=170

1 files changed, 6 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index 2f5742662..412f38afc 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -118,6 +118,12 @@ typedef struct {
         /* private data for the particular self-heal algorithm */
         void *private;
 
+        gf_boolean_t healing_fd_opened;   /* set by caller: true if caller
+                                             has already opened fd */
+
+        gf_boolean_t data_lock_held;      /* set by caller: true if caller
+                                             has already acquired 0-0 lock */
+
 	int (*completion_cbk) (call_frame_t *frame, xlator_t *this);
         int (*algo_completion_cbk) (call_frame_t *frame, xlator_t *this);
         int (*algo_abort_cbk) (call_frame_t *frame, xlator_t *this);