From a9cde23ab7cdf5e4e93432dffd0e734267f2b745 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 4 May 2018 15:34:59 -0400 Subject: [PATCH] SUNRPC: Add a ->free_slot transport callout Refactor: xprtrdma needs to have better control over when RPCs are awoken from the backlog queue, so replace xprt_free_slot with a transport op callout. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- include/linux/sunrpc/xprt.h | 4 ++++ net/sunrpc/xprt.c | 5 +++-- net/sunrpc/xprtrdma/svc_rdma_backchannel.c | 1 + net/sunrpc/xprtrdma/transport.c | 1 + net/sunrpc/xprtsock.c | 4 ++++ 5 files changed, 13 insertions(+), 2 deletions(-) diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h index 9784e2875e7e..706eef12bbc0 100644 --- a/include/linux/sunrpc/xprt.h +++ b/include/linux/sunrpc/xprt.h @@ -127,6 +127,8 @@ struct rpc_xprt_ops { int (*reserve_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task); void (*alloc_slot)(struct rpc_xprt *xprt, struct rpc_task *task); + void (*free_slot)(struct rpc_xprt *xprt, + struct rpc_rqst *req); void (*rpcbind)(struct rpc_task *task); void (*set_port)(struct rpc_xprt *xprt, unsigned short port); void (*connect)(struct rpc_xprt *xprt, struct rpc_task *task); @@ -329,6 +331,8 @@ 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); void xprt_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task); +void xprt_free_slot(struct rpc_xprt *xprt, + struct rpc_rqst *req); void xprt_lock_and_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task); bool xprt_prepare_transmit(struct rpc_task *task); void xprt_transmit(struct rpc_task *task); diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 2d959268d9b7..3c85af058227 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1186,7 +1186,7 @@ void xprt_lock_and_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task) } EXPORT_SYMBOL_GPL(xprt_lock_and_alloc_slot); -static void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req) +void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req) { spin_lock(&xprt->reserve_lock); if (!xprt_dynamic_free_slot(xprt, req)) { @@ -1196,6 +1196,7 @@ static void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req) xprt_wake_up_backlog(xprt); spin_unlock(&xprt->reserve_lock); } +EXPORT_SYMBOL_GPL(xprt_free_slot); static void xprt_free_all_slots(struct rpc_xprt *xprt) { @@ -1375,7 +1376,7 @@ void xprt_release(struct rpc_task *task) dprintk("RPC: %5u release request %p\n", task->tk_pid, req); if (likely(!bc_prealloc(req))) - xprt_free_slot(xprt, req); + xprt->ops->free_slot(xprt, req); else xprt_free_bc_request(req); } diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c index a73632ca9048..1035516d54e2 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c +++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c @@ -273,6 +273,7 @@ static const struct rpc_xprt_ops xprt_rdma_bc_procs = { .reserve_xprt = xprt_reserve_xprt_cong, .release_xprt = xprt_release_xprt_cong, .alloc_slot = xprt_alloc_slot, + .free_slot = xprt_free_slot, .release_request = xprt_release_rqst_cong, .buf_alloc = xprt_rdma_bc_allocate, .buf_free = xprt_rdma_bc_free, diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 4717578b4b81..cf5e866ee969 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -781,6 +781,7 @@ static const struct rpc_xprt_ops xprt_rdma_procs = { .reserve_xprt = xprt_reserve_xprt_cong, .release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */ .alloc_slot = xprt_alloc_slot, + .free_slot = xprt_free_slot, .release_request = xprt_release_rqst_cong, /* ditto */ .set_retrans_timeout = xprt_set_retrans_timeout_def, /* ditto */ .timer = xprt_rdma_timer, diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index c8902f11efdd..9e1c5024aba9 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -2763,6 +2763,7 @@ static const struct rpc_xprt_ops xs_local_ops = { .reserve_xprt = xprt_reserve_xprt, .release_xprt = xs_tcp_release_xprt, .alloc_slot = xprt_alloc_slot, + .free_slot = xprt_free_slot, .rpcbind = xs_local_rpcbind, .set_port = xs_local_set_port, .connect = xs_local_connect, @@ -2782,6 +2783,7 @@ static const struct rpc_xprt_ops xs_udp_ops = { .reserve_xprt = xprt_reserve_xprt_cong, .release_xprt = xprt_release_xprt_cong, .alloc_slot = xprt_alloc_slot, + .free_slot = xprt_free_slot, .rpcbind = rpcb_getport_async, .set_port = xs_set_port, .connect = xs_connect, @@ -2803,6 +2805,7 @@ static const struct rpc_xprt_ops xs_tcp_ops = { .reserve_xprt = xprt_reserve_xprt, .release_xprt = xs_tcp_release_xprt, .alloc_slot = xprt_lock_and_alloc_slot, + .free_slot = xprt_free_slot, .rpcbind = rpcb_getport_async, .set_port = xs_set_port, .connect = xs_connect, @@ -2834,6 +2837,7 @@ static const struct rpc_xprt_ops bc_tcp_ops = { .reserve_xprt = xprt_reserve_xprt, .release_xprt = xprt_release_xprt, .alloc_slot = xprt_alloc_slot, + .free_slot = xprt_free_slot, .buf_alloc = bc_malloc, .buf_free = bc_free, .send_request = bc_send_request, -- GitLab