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SUNRPC: Add RPC task and client level options to disable the resend timeout

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Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-09-24 12:00:27 -04:00
parent 90051ea774
commit 8a19a0b6cb
4 changed files with 19 additions and 4 deletions
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2
include/linux/sunrpc/clnt.h
View File

@ -49,6 +49,7 @@ struct rpc_clnt {
unsigned int cl_softrtry : 1,/* soft timeouts */ unsigned int cl_softrtry : 1,/* soft timeouts */
cl_discrtry : 1,/* disconnect before retry */ cl_discrtry : 1,/* disconnect before retry */
cl_noretranstimeo: 1,/* No retransmit timeouts */
cl_autobind : 1,/* use getport() */ cl_autobind : 1,/* use getport() */
cl_chatty : 1;/* be verbose */ cl_chatty : 1;/* be verbose */
@ -126,6 +127,7 @@ struct rpc_create_args {
#define RPC_CLNT_CREATE_QUIET (1UL << 6) #define RPC_CLNT_CREATE_QUIET (1UL << 6)
#define RPC_CLNT_CREATE_INFINITE_SLOTS (1UL << 7) #define RPC_CLNT_CREATE_INFINITE_SLOTS (1UL << 7)
#define RPC_CLNT_CREATE_NO_IDLE_TIMEOUT (1UL << 8) #define RPC_CLNT_CREATE_NO_IDLE_TIMEOUT (1UL << 8)
#define RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT (1UL << 9)
struct rpc_clnt *rpc_create(struct rpc_create_args *args); struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *, struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,

1
include/linux/sunrpc/sched.h
View File

@ -122,6 +122,7 @@ struct rpc_task_setup {
#define RPC_TASK_SENT 0x0800 /* message was sent */ #define RPC_TASK_SENT 0x0800 /* message was sent */
#define RPC_TASK_TIMEOUT 0x1000 /* fail with ETIMEDOUT on timeout */ #define RPC_TASK_TIMEOUT 0x1000 /* fail with ETIMEDOUT on timeout */
#define RPC_TASK_NOCONNECT 0x2000 /* return ENOTCONN if not connected */ #define RPC_TASK_NOCONNECT 0x2000 /* return ENOTCONN if not connected */
#define RPC_TASK_NO_RETRANS_TIMEOUT 0x4000 /* wait forever for a reply */
#define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC) #define RPC_IS_ASYNC(t) ((t)->tk_flags & RPC_TASK_ASYNC)
#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER) #define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)

5
net/sunrpc/clnt.c
View File

@ -772,6 +772,8 @@ void rpc_task_set_client(struct rpc_task *task, struct rpc_clnt *clnt)
atomic_inc(&clnt->cl_count); atomic_inc(&clnt->cl_count);
if (clnt->cl_softrtry) if (clnt->cl_softrtry)
task->tk_flags |= RPC_TASK_SOFT; task->tk_flags |= RPC_TASK_SOFT;
if (clnt->cl_noretranstimeo)
task->tk_flags |= RPC_TASK_NO_RETRANS_TIMEOUT;
if (sk_memalloc_socks()) { if (sk_memalloc_socks()) {
struct rpc_xprt *xprt; struct rpc_xprt *xprt;
@ -1898,7 +1900,8 @@ call_status(struct rpc_task *task)
rpc_delay(task, 3*HZ); rpc_delay(task, 3*HZ);
case -ETIMEDOUT: case -ETIMEDOUT:
task->tk_action = call_timeout; task->tk_action = call_timeout;
if (task->tk_client->cl_discrtry) if (!(task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT)
&& task->tk_client->cl_discrtry)
xprt_conditional_disconnect(req->rq_xprt, xprt_conditional_disconnect(req->rq_xprt,
req->rq_connect_cookie); req->rq_connect_cookie);
break; break;

15
net/sunrpc/xprt.c
View File

@ -873,9 +873,18 @@ bool xprt_prepare_transmit(struct rpc_task *task)
dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid); dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid);
spin_lock_bh(&xprt->transport_lock); spin_lock_bh(&xprt->transport_lock);
if (req->rq_reply_bytes_recvd && !req->rq_bytes_sent) { if (!req->rq_bytes_sent) {
task->tk_status = req->rq_reply_bytes_recvd; if (req->rq_reply_bytes_recvd) {
goto out_unlock; task->tk_status = req->rq_reply_bytes_recvd;
goto out_unlock;
}
if ((task->tk_flags & RPC_TASK_NO_RETRANS_TIMEOUT)
&& xprt_connected(xprt)
&& req->rq_connect_cookie == xprt->connect_cookie) {
xprt->ops->set_retrans_timeout(task);
rpc_sleep_on(&xprt->pending, task, xprt_timer);
goto out_unlock;
}
} }
if (!xprt->ops->reserve_xprt(xprt, task)) { if (!xprt->ops->reserve_xprt(xprt, task)) {
task->tk_status = -EAGAIN; task->tk_status = -EAGAIN;