From 7581d90109cad7d7322fd90cea023c706912f4bd Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 3 Jan 2020 11:56:37 -0500 Subject: [PATCH] xprtrdma: Refactor initialization of ep->rep_max_requests Clean up: there is no need to keep two copies of the same value. Also, in subsequent patches, rpcrdma_ep_create() will be called in the connect worker rather than at set-up time. Minor fix: Initialize the transport's sendctx to the value based on the capabilities of the underlying device, not the maximum setting. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- net/sunrpc/xprtrdma/rpc_rdma.c | 6 +++--- net/sunrpc/xprtrdma/transport.c | 3 ++- net/sunrpc/xprtrdma/verbs.c | 8 ++++---- net/sunrpc/xprtrdma/xprt_rdma.h | 5 ++--- 4 files changed, 11 insertions(+), 11 deletions(-) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index af917228d245..520323ddc930 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -909,7 +909,7 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst) goto out_err; *p++ = rqst->rq_xid; *p++ = rpcrdma_version; - *p++ = cpu_to_be32(r_xprt->rx_buf.rb_max_requests); + *p++ = r_xprt->rx_buf.rb_max_requests; /* When the ULP employs a GSS flavor that guarantees integrity * or privacy, direct data placement of individual data items @@ -1480,8 +1480,8 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep) if (credits == 0) credits = 1; /* don't deadlock */ - else if (credits > buf->rb_max_requests) - credits = buf->rb_max_requests; + else if (credits > r_xprt->rx_ep.rep_max_requests) + credits = r_xprt->rx_ep.rep_max_requests; if (buf->rb_credits != credits) rpcrdma_update_cwnd(r_xprt, credits); rpcrdma_post_recvs(r_xprt, false); diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 7395eb2cfdeb..f868a75057ad 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -316,7 +316,8 @@ xprt_setup_rdma(struct xprt_create *args) if (args->addrlen > sizeof(xprt->addr)) return ERR_PTR(-EBADF); - xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0, 0); + xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt), 0, + xprt_rdma_slot_table_entries); if (!xprt) return ERR_PTR(-ENOMEM); diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index b6aba0c85998..766e77592cfd 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -475,13 +475,14 @@ int rpcrdma_ep_create(struct rpcrdma_xprt *r_xprt) struct ib_cq *sendcq, *recvcq; int rc; - ep->rep_max_requests = xprt_rdma_slot_table_entries; + ep->rep_max_requests = r_xprt->rx_xprt.max_reqs; ep->rep_inline_send = xprt_rdma_max_inline_write; ep->rep_inline_recv = xprt_rdma_max_inline_read; rc = frwr_open(ia, ep); if (rc) return rc; + r_xprt->rx_buf.rb_max_requests = cpu_to_be32(ep->rep_max_requests); ep->rep_attr.event_handler = rpcrdma_qp_event_handler; ep->rep_attr.qp_context = ep; @@ -821,7 +822,7 @@ static int rpcrdma_sendctxs_create(struct rpcrdma_xprt *r_xprt) * the ->send_request call to fail temporarily before too many * Sends are posted. */ - i = buf->rb_max_requests + RPCRDMA_MAX_BC_REQUESTS; + i = r_xprt->rx_ep.rep_max_requests + RPCRDMA_MAX_BC_REQUESTS; buf->rb_sc_ctxs = kcalloc(i, sizeof(sc), GFP_KERNEL); if (!buf->rb_sc_ctxs) return -ENOMEM; @@ -1155,7 +1156,6 @@ int rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt) struct rpcrdma_buffer *buf = &r_xprt->rx_buf; int i, rc; - buf->rb_max_requests = r_xprt->rx_ep.rep_max_requests; buf->rb_bc_srv_max_requests = 0; spin_lock_init(&buf->rb_lock); INIT_LIST_HEAD(&buf->rb_mrs); @@ -1167,7 +1167,7 @@ int rpcrdma_buffer_create(struct rpcrdma_xprt *r_xprt) INIT_LIST_HEAD(&buf->rb_all_reps); rc = -ENOMEM; - for (i = 0; i < buf->rb_max_requests; i++) { + for (i = 0; i < r_xprt->rx_xprt.max_reqs; i++) { struct rpcrdma_req *req; req = rpcrdma_req_create(r_xprt, RPCRDMA_V1_DEF_INLINE_SIZE * 2, diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 7655a99fd559..0fde694144f5 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -98,7 +98,7 @@ struct rpcrdma_ep { wait_queue_head_t rep_connect_wait; struct rpcrdma_connect_private rep_cm_private; struct rdma_conn_param rep_remote_cma; - unsigned int rep_max_requests; /* set by /proc */ + unsigned int rep_max_requests; /* depends on device */ unsigned int rep_inline_send; /* negotiated */ unsigned int rep_inline_recv; /* negotiated */ int rep_receive_count; @@ -372,7 +372,7 @@ struct rpcrdma_buffer { struct llist_head rb_free_reps; - u32 rb_max_requests; + __be32 rb_max_requests; u32 rb_credits; /* most recent credit grant */ u32 rb_bc_srv_max_requests; @@ -582,7 +582,6 @@ static inline void rpcrdma_set_xdrlen(struct xdr_buf *xdr, size_t len) /* RPC/RDMA module init - xprtrdma/transport.c */ -extern unsigned int xprt_rdma_slot_table_entries; extern unsigned int xprt_rdma_max_inline_read; extern unsigned int xprt_rdma_max_inline_write; void xprt_rdma_format_addresses(struct rpc_xprt *xprt, struct sockaddr *sap); -- 2.11.0