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| author | Chuck Lever <chuck.lever@oracle.com> | 2017-02-08 17:00:51 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2017-02-10 14:02:37 -0500 |
| commit | b977b644ccf821ab1269582f7efe1d0d85faa1f6 (patch) | |
| tree | 9c2f0a3512ea55bfacf9f1ef6926c1f964a16444 /net | |
| parent | 9a5c63e9c4056de8a73555131e6f698ddb0b9e0d (diff) | |
| download | linux-b977b644ccf821ab1269582f7efe1d0d85faa1f6.tar.gz linux-b977b644ccf821ab1269582f7efe1d0d85faa1f6.tar.xz | |
sunrpc: Allow xprt->ops->timer method to sleep
The transport lock is needed to protect the xprt_adjust_cwnd() call
in xs_udp_timer, but it is not necessary for accessing the
rq_reply_bytes_recvd or tk_status fields. It is correct to sublimate
the lock into UDP's xs_udp_timer method, where it is required.
The ->timer method has to take the transport lock if needed, but it
can now sleep safely, or even call back into the RPC scheduler.
This is more a clean-up than a fix, but the "issue" was introduced
by my transport switch patches back in 2005.
Fixes: 46c0ee8bc4ad ("RPC: separate xprt_timer implementations")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/xprt.c | 2 | ||||
| -rw-r--r-- | net/sunrpc/xprtsock.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 9a6be030ca7d..b530a2852ba8 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -897,13 +897,11 @@ static void xprt_timer(struct rpc_task *task) return; dprintk("RPC: %5u xprt_timer\n", task->tk_pid); - spin_lock_bh(&xprt->transport_lock); if (!req->rq_reply_bytes_recvd) { if (xprt->ops->timer) xprt->ops->timer(xprt, task); } else task->tk_status = 0; - spin_unlock_bh(&xprt->transport_lock); } /** diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 810e9b59be16..18b4e7ff8879 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1739,7 +1739,9 @@ static void xs_udp_set_buffer_size(struct rpc_xprt *xprt, size_t sndsize, size_t */ static void xs_udp_timer(struct rpc_xprt *xprt, struct rpc_task *task) { + spin_lock_bh(&xprt->transport_lock); xprt_adjust_cwnd(xprt, task, -ETIMEDOUT); + spin_unlock_bh(&xprt->transport_lock); } static unsigned short xs_get_random_port(void) |