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SUNRPC: Add a transmission queue for RPC requests

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Add the queue that will enforce the ordering of RPC task transmission.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust
2018-08-09 23:33:21 -04:00
parent ef3f54347f
commit 944b042921
3 changed files with 83 additions and 13 deletions
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6
net/sunrpc/clnt.c
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@@ -1156,11 +1156,11 @@ struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req)
*/
xbufp->len = xbufp->head[0].iov_len + xbufp->page_len +
xbufp->tail[0].iov_len;
set_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);
task->tk_action = call_bc_transmit;
atomic_inc(&task->tk_count);
WARN_ON_ONCE(atomic_read(&task->tk_count) != 2);
xprt_request_enqueue_transmit(task);
rpc_execute(task);
dprintk("RPC: rpc_run_bc_task: task= %p\n", task);
@@ -1759,8 +1759,6 @@ rpc_xdr_encode(struct rpc_task *task)
task->tk_status = rpcauth_wrap_req(task, encode, req, p,
task->tk_msg.rpc_argp);
if (task->tk_status == 0)
set_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);
}
/*
@@ -1964,6 +1962,7 @@ call_transmit(struct rpc_task *task)
/* Add task to reply queue before transmission to avoid races */
if (rpc_reply_expected(task))
xprt_request_enqueue_receive(task);
xprt_request_enqueue_transmit(task);
if (!xprt_prepare_transmit(task))
return;
@@ -1998,7 +1997,6 @@ call_transmit_status(struct rpc_task *task)
xprt_end_transmit(task);
break;
case -EBADMSG:
clear_bit(RPC_TASK_NEED_XMIT, &task->tk_runstate);
task->tk_action = call_transmit;
task->tk_status = 0;
xprt_end_transmit(task);