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, 4 insertions, 0 deletions

diff --git a/xlators/cluster/afr/src/afr-inode-read.c b/xlators/cluster/afr/src/afr-inode-read.c
index e8894a62620..c5521704de2 100644
--- a/xlators/cluster/afr/src/afr-inode-read.c
+++ b/xlators/cluster/afr/src/afr-inode-read.c
@@ -302,6 +302,7 @@ afr_fstat(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
     afr_local_t *local = NULL;
     int op_errno = 0;
 
+    AFR_ERROR_OUT_IF_FDCTX_INVALID(fd, this, op_errno, out);
     local = AFR_FRAME_INIT(frame, op_errno);
     if (!local)
         goto out;
@@ -1698,6 +1699,7 @@ afr_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name,
     int32_t op_errno = 0;
     fop_fgetxattr_cbk_t cbk = NULL;
 
+    AFR_ERROR_OUT_IF_FDCTX_INVALID(fd, this, op_errno, out);
     local = AFR_FRAME_INIT(frame, op_errno);
     if (!local)
         goto out;
@@ -1791,6 +1793,7 @@ afr_readv(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
     afr_local_t *local = NULL;
     int32_t op_errno = 0;
 
+    AFR_ERROR_OUT_IF_FDCTX_INVALID(fd, this, op_errno, out);
     local = AFR_FRAME_INIT(frame, op_errno);
     if (!local)
         goto out;
@@ -1866,6 +1869,7 @@ afr_seek(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
     afr_local_t *local = NULL;
     int32_t op_errno = 0;
 
+    AFR_ERROR_OUT_IF_FDCTX_INVALID(fd, this, op_errno, out);
     local = AFR_FRAME_INIT(frame, op_errno);
     if (!local)
         goto out;