From 37ac86c3a76c113619b7d9afe0251bbfc04cb80a Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 4 May 2018 15:34:53 -0400 Subject: [PATCH] SUNRPC: Initialize rpc_rqst outside of xprt->reserve_lock alloc_slot is a transport-specific op, but initializing an rpc_rqst is common to all transports. In addition, the only part of initial- izing an rpc_rqst that needs serialization is getting a fresh XID. Move rpc_rqst initialization to common code in preparation for adding a transport-specific alloc_slot to xprtrdma. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- include/linux/sunrpc/xprt.h | 1 + net/sunrpc/clnt.c | 1 + net/sunrpc/xprt.c | 12 +++++++----- 3 files changed, 9 insertions(+), 5 deletions(-) diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 5fea0fb420df..9784e2875e7e 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -324,6 +324,7 @@ struct xprt_class { struct rpc_xprt *xprt_create_transport(struct xprt_create *args); void xprt_connect(struct rpc_task *task); void xprt_reserve(struct rpc_task *task); +void xprt_request_init(struct rpc_task *task); void xprt_retry_reserve(struct rpc_task *task); int xprt_reserve_xprt(struct rpc_xprt *xprt, struct rpc_task *task); int xprt_reserve_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task); diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index c2266f387213..d839c33ae7d9 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -1546,6 +1546,7 @@ call_reserveresult(struct rpc_task *task) task->tk_status = 0; if (status >= 0) { if (task->tk_rqstp) { + xprt_request_init(task); task->tk_action = call_refresh; return; } diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 70f005044f06..2d959268d9b7 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -66,7 +66,7 @@ * Local functions */ static void xprt_init(struct rpc_xprt *xprt, struct net *net); -static void xprt_request_init(struct rpc_task *, struct rpc_xprt *); +static __be32 xprt_alloc_xid(struct rpc_xprt *xprt); static void xprt_connect_status(struct rpc_task *task); static int __xprt_get_cong(struct rpc_xprt *, struct rpc_task *); static void __xprt_put_cong(struct rpc_xprt *, struct rpc_rqst *); @@ -987,6 +987,8 @@ bool xprt_prepare_transmit(struct rpc_task *task) task->tk_status = -EAGAIN; goto out_unlock; } + if (!bc_prealloc(req) && !req->rq_xmit_bytes_sent) + req->rq_xid = xprt_alloc_xid(xprt); ret = true; out_unlock: spin_unlock_bh(&xprt->transport_lock); @@ -1163,10 +1165,10 @@ void xprt_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task) out_init_req: xprt->stat.max_slots = max_t(unsigned int, xprt->stat.max_slots, xprt->num_reqs); + spin_unlock(&xprt->reserve_lock); + task->tk_status = 0; task->tk_rqstp = req; - xprt_request_init(task, xprt); - spin_unlock(&xprt->reserve_lock); } EXPORT_SYMBOL_GPL(xprt_alloc_slot); @@ -1303,8 +1305,9 @@ static inline void xprt_init_xid(struct rpc_xprt *xprt) xprt->xid = prandom_u32(); } -static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) +void xprt_request_init(struct rpc_task *task) { + struct rpc_xprt *xprt = task->tk_xprt; struct rpc_rqst *req = task->tk_rqstp; INIT_LIST_HEAD(&req->rq_list); @@ -1312,7 +1315,6 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) req->rq_task = task; req->rq_xprt = xprt; req->rq_buffer = NULL; - req->rq_xid = xprt_alloc_xid(xprt); req->rq_connect_cookie = xprt->connect_cookie - 1; req->rq_bytes_sent = 0; req->rq_snd_buf.len = 0;