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-rw-r--r--fs/lockd/svclock.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 2f4d8fa6668..fe9bdb4a220 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -763,11 +763,20 @@ callback:
dprintk("lockd: GRANTing blocked lock.\n");
block->b_granted = 1;
- /* Schedule next grant callback in 30 seconds */
- nlmsvc_insert_block(block, 30 * HZ);
+ /* keep block on the list, but don't reattempt until the RPC
+ * completes or the submission fails
+ */
+ nlmsvc_insert_block(block, NLM_NEVER);
+
+ /* Call the client -- use a soft RPC task since nlmsvc_retry_blocked
+ * will queue up a new one if this one times out
+ */
+ error = nlm_async_call(block->b_call, NLMPROC_GRANTED_MSG,
+ &nlmsvc_grant_ops);
- /* Call the client */
- nlm_async_call(block->b_call, NLMPROC_GRANTED_MSG, &nlmsvc_grant_ops);
+ /* RPC submission failed, wait a bit and retry */
+ if (error < 0)
+ nlmsvc_insert_block(block, 10 * HZ);
}
/*
@@ -786,6 +795,17 @@ static void nlmsvc_grant_callback(struct rpc_task *task, void *data)
dprintk("lockd: GRANT_MSG RPC callback\n");
+ /* if the block is not on a list at this point then it has
+ * been invalidated. Don't try to requeue it.
+ *
+ * FIXME: it's possible that the block is removed from the list
+ * after this check but before the nlmsvc_insert_block. In that
+ * case it will be added back. Perhaps we need better locking
+ * for nlm_blocked?
+ */
+ if (list_empty(&block->b_list))
+ return;
+
/* Technically, we should down the file semaphore here. Since we
* move the block towards the head of the queue only, no harm
* can be done, though. */