protocol/client: cluster/afr: Support lock recovery and self heal.

Signed-off-by: Pavan Vilas Sondur <pavan@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

BUG: 865 (Add locks recovery support in GlusterFS)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=865

1 files changed, 17 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr.h b/xlators/cluster/afr/src/afr.h
index 26f2c989f4e..68b4a1e305e 100644
--- a/xlators/cluster/afr/src/afr.h
+++ b/xlators/cluster/afr/src/afr.h
@@ -85,6 +85,9 @@ typedef struct _afr_private {
 
 	struct _pump_private *pump_private; /* Set if we are loaded as pump */
         int                   use_afr_in_pump;
+
+        pthread_mutex_t  mutex;
+        struct list_head saved_fds;   /* list of fds on which locks have succeeded */
 } afr_private_t;
 
 typedef struct {
@@ -262,6 +265,11 @@ typedef struct {
 
 } afr_internal_lock_t;
 
+typedef struct _afr_locked_fd {
+        fd_t  *fd;
+        struct list_head list;
+} afr_locked_fd_t;
+
 typedef struct _afr_local {
 	unsigned int call_count;
 	unsigned int success_count;
@@ -619,6 +627,8 @@ typedef struct {
         int  hit, miss;
         gf_boolean_t failed_over;
         struct list_head entries; /* needed for readdir failover */
+
+        unsigned char *locked_on; /* which subvolumes locks have been successful */
 } afr_fd_ctx_t;
 
 
@@ -655,6 +665,13 @@ int32_t
 afr_notify (xlator_t *this, int32_t event,
             void *data, ...);
 
+int
+afr_save_locked_fd (xlator_t *this, fd_t *fd);
+
+int
+afr_mark_locked_nodes (xlator_t *this, fd_t *fd,
+                       unsigned char *locked_nodes);
+
 void
 afr_set_lk_owner (call_frame_t *frame, xlator_t *this);