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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-11 09:19:47 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-11 09:19:47 -0800
commit0c0d61ca93d111c521182c0909e478fa709e05c6 (patch)
treebe690362142ec79a673f85d7b2b7323102fab6f8 /fs
parenteedcdefb1ad75de9cc0889b247524be64cc244ef (diff)
parentbb50c8012cbd85b8e105584b32e4d5a2d335dcef (diff)
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Merge branch 'for-linus' of git://linux-nfs.org/~bfields/linux
* 'for-linus' of git://linux-nfs.org/~bfields/linux: SUNPRC: Fix printk format warning nfsd: clean up svc_reserve_auth() NLM: don't requeue block if it was invalidated while GRANT_MSG was in flight NLM: don't reattempt GRANT_MSG when there is already an RPC in flight NLM: have server-side RPC clients default to soft RPC tasks NLM: set RPC_CLNT_CREATE_NOPING for NLM RPC clients
Diffstat (limited to 'fs')
-rw-r--r--fs/lockd/host.c10
-rw-r--r--fs/lockd/svclock.c28
2 files changed, 33 insertions, 5 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index ca6b16fc3101..f1ef49fff118 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -243,10 +243,18 @@ nlm_bind_host(struct nlm_host *host)
.program = &nlm_program,
.version = host->h_version,
.authflavor = RPC_AUTH_UNIX,
- .flags = (RPC_CLNT_CREATE_HARDRTRY |
+ .flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_AUTOBIND),
};
+ /*
+ * lockd retries server side blocks automatically so we want
+ * those to be soft RPC calls. Client side calls need to be
+ * hard RPC tasks.
+ */
+ if (!host->h_server)
+ args.flags |= RPC_CLNT_CREATE_HARDRTRY;
+
clnt = rpc_create(&args);
if (!IS_ERR(clnt))
host->h_rpcclnt = clnt;
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index 2f4d8fa66689..fe9bdb4a220c 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. */