cache_inode_rename needs to avoid deadlock.

Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>
avoid delete stale entry's state twice in nfs4_op_open.

Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>
PTHREAD_RWLOCK_UNLOCK macro fix.

Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>
GPFSFSAL_symlink needs to ensure link type upon create.
Otherwise return EXIST.

Signed-off-by: Rong Zeng <rongzeng@us.ibm.com>