afr: lock healing changes

Implements lock healing for gluster-block fencing use case.

If mandatory lock is enabled:
- Add domain lock/unlock to afr_lk fop.
- Maintain a list of locks to be healed in afr_private_t.
- Add lock to the list if afr_lk(F_SETLK or F_SETLKW) was sucessful.
- Remove it from the list during afr_lk(F_UNLCK).
- On child_down, mark lock as needing heal on that child. If lock is
lost on quorum no. of bricks, remove it from the list and mark fd bad.
- For fds marked as bad, fail the subsequent fd based fops.
- On parent up, traverse the list and heal the locks IFF the client is
the lk owner and has quorum. (shd does not heal any locks).

updates: #613
Change-Id: I03c46ceaea30f5e6236d5ec13f71d843d827f1bc
Signed-off-by: Ravishankar N <ravishankar@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/xlators/cluster/afr/src/afr-messages.h b/xlators/cluster/afr/src/afr-messages.h
index c9c99270e98..8e59c51b993 100644
--- a/xlators/cluster/afr/src/afr-messages.h
+++ b/xlators/cluster/afr/src/afr-messages.h
@@ -42,6 +42,6 @@ GLFS_MSGID(AFR, AFR_MSG_QUORUM_FAIL, AFR_MSG_QUORUM_MET,
            AFR_MSG_SPLIT_BRAIN_STATUS, AFR_MSG_ADD_BRICK_STATUS,
            AFR_MSG_NO_CHANGELOG, AFR_MSG_TIMER_CREATE_FAIL,
            AFR_MSG_SBRAIN_FAV_CHILD_POLICY, AFR_MSG_INODE_CTX_GET_FAILED,
-           AFR_MSG_THIN_ARB);
+           AFR_MSG_THIN_ARB, AFR_MSG_LK_HEAL_DOM);
 
 #endif /* !_AFR_MESSAGES_H_ */