diff options
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/backchannel.c | 7 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/fmr_ops.c | 13 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/frwr_ops.c | 53 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 32 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/transport.c | 43 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 44 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/xprt_rdma.h | 4 |
7 files changed, 111 insertions, 85 deletions
diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index ed1a4a3065ee..47ebac949769 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -44,13 +44,6 @@ static int rpcrdma_bc_setup_rqst(struct rpcrdma_xprt *r_xprt, if (IS_ERR(req)) return PTR_ERR(req); - rb = rpcrdma_alloc_regbuf(RPCRDMA_HDRBUF_SIZE, - DMA_TO_DEVICE, GFP_KERNEL); - if (IS_ERR(rb)) - goto out_fail; - req->rl_rdmabuf = rb; - xdr_buf_init(&req->rl_hdrbuf, rb->rg_base, rdmab_length(rb)); - size = r_xprt->rx_data.inline_rsize; rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, GFP_KERNEL); if (IS_ERR(rb)) diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index d5f95bb39300..5cc68a824f45 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -191,7 +191,7 @@ fmr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, mr = rpcrdma_mr_get(r_xprt); if (!mr) - return ERR_PTR(-ENOBUFS); + return ERR_PTR(-EAGAIN); pageoff = offset_in_page(seg1->mr_offset); seg1->mr_offset -= pageoff; /* start of page */ @@ -251,6 +251,16 @@ out_maperr: return ERR_PTR(-EIO); } +/* Post Send WR containing the RPC Call message. + */ +static int +fmr_op_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req) +{ + struct ib_send_wr *bad_wr; + + return ib_post_send(ia->ri_id->qp, &req->rl_sendctx->sc_wr, &bad_wr); +} + /* Invalidate all memory regions that were registered for "req". * * Sleeps until it is safe for the host CPU to access the @@ -305,6 +315,7 @@ out_reset: const struct rpcrdma_memreg_ops rpcrdma_fmr_memreg_ops = { .ro_map = fmr_op_map, + .ro_send = fmr_op_send, .ro_unmap_sync = fmr_op_unmap_sync, .ro_recover_mr = fmr_op_recover_mr, .ro_open = fmr_op_open, diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c index 90f688f19783..c5743a0960be 100644 --- a/net/sunrpc/xprtrdma/frwr_ops.c +++ b/net/sunrpc/xprtrdma/frwr_ops.c @@ -357,8 +357,7 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, struct rpcrdma_mr *mr; struct ib_mr *ibmr; struct ib_reg_wr *reg_wr; - struct ib_send_wr *bad_wr; - int rc, i, n; + int i, n; u8 key; mr = NULL; @@ -367,7 +366,7 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, rpcrdma_mr_defer_recovery(mr); mr = rpcrdma_mr_get(r_xprt); if (!mr) - return ERR_PTR(-ENOBUFS); + return ERR_PTR(-EAGAIN); } while (mr->frwr.fr_state != FRWR_IS_INVALID); frwr = &mr->frwr; frwr->fr_state = FRWR_IS_VALID; @@ -407,22 +406,12 @@ frwr_op_map(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mr_seg *seg, ib_update_fast_reg_key(ibmr, ++key); reg_wr = &frwr->fr_regwr; - reg_wr->wr.next = NULL; - reg_wr->wr.opcode = IB_WR_REG_MR; - frwr->fr_cqe.done = frwr_wc_fastreg; - reg_wr->wr.wr_cqe = &frwr->fr_cqe; - reg_wr->wr.num_sge = 0; - reg_wr->wr.send_flags = 0; reg_wr->mr = ibmr; reg_wr->key = ibmr->rkey; reg_wr->access = writing ? IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE : IB_ACCESS_REMOTE_READ; - rc = ib_post_send(ia->ri_id->qp, ®_wr->wr, &bad_wr); - if (rc) - goto out_senderr; - mr->mr_handle = ibmr->rkey; mr->mr_length = ibmr->length; mr->mr_offset = ibmr->iova; @@ -442,11 +431,40 @@ out_mapmr_err: frwr->fr_mr, n, mr->mr_nents); rpcrdma_mr_defer_recovery(mr); return ERR_PTR(-EIO); +} -out_senderr: - pr_err("rpcrdma: FRWR registration ib_post_send returned %i\n", rc); - rpcrdma_mr_defer_recovery(mr); - return ERR_PTR(-ENOTCONN); +/* Post Send WR containing the RPC Call message. + * + * For FRMR, chain any FastReg WRs to the Send WR. Only a + * single ib_post_send call is needed to register memory + * and then post the Send WR. + */ +static int +frwr_op_send(struct rpcrdma_ia *ia, struct rpcrdma_req *req) +{ + struct ib_send_wr *post_wr, *bad_wr; + struct rpcrdma_mr *mr; + + post_wr = &req->rl_sendctx->sc_wr; + list_for_each_entry(mr, &req->rl_registered, mr_list) { + struct rpcrdma_frwr *frwr; + + frwr = &mr->frwr; + + frwr->fr_cqe.done = frwr_wc_fastreg; + frwr->fr_regwr.wr.next = post_wr; + frwr->fr_regwr.wr.wr_cqe = &frwr->fr_cqe; + frwr->fr_regwr.wr.num_sge = 0; + frwr->fr_regwr.wr.opcode = IB_WR_REG_MR; + frwr->fr_regwr.wr.send_flags = 0; + + post_wr = &frwr->fr_regwr.wr; + } + + /* If ib_post_send fails, the next ->send_request for + * @req will queue these MWs for recovery. + */ + return ib_post_send(ia->ri_id->qp, post_wr, &bad_wr); } /* Handle a remotely invalidated mr on the @mrs list @@ -561,6 +579,7 @@ reset_mrs: const struct rpcrdma_memreg_ops rpcrdma_frwr_memreg_ops = { .ro_map = frwr_op_map, + .ro_send = frwr_op_send, .ro_reminv = frwr_op_reminv, .ro_unmap_sync = frwr_op_unmap_sync, .ro_recover_mr = frwr_op_recover_mr, diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index f0855a959a27..e8adad33d0bb 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -365,7 +365,7 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, false, &mr); if (IS_ERR(seg)) - return PTR_ERR(seg); + goto out_maperr; rpcrdma_mr_push(mr, &req->rl_registered); if (encode_read_segment(xdr, mr, pos) < 0) @@ -377,6 +377,11 @@ rpcrdma_encode_read_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, } while (nsegs); return 0; + +out_maperr: + if (PTR_ERR(seg) == -EAGAIN) + xprt_wait_for_buffer_space(rqst->rq_task, NULL); + return PTR_ERR(seg); } /* Register and XDR encode the Write list. Supports encoding a list @@ -423,7 +428,7 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, true, &mr); if (IS_ERR(seg)) - return PTR_ERR(seg); + goto out_maperr; rpcrdma_mr_push(mr, &req->rl_registered); if (encode_rdma_segment(xdr, mr) < 0) @@ -440,6 +445,11 @@ rpcrdma_encode_write_list(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, *segcount = cpu_to_be32(nchunks); return 0; + +out_maperr: + if (PTR_ERR(seg) == -EAGAIN) + xprt_wait_for_buffer_space(rqst->rq_task, NULL); + return PTR_ERR(seg); } /* Register and XDR encode the Reply chunk. Supports encoding an array @@ -481,7 +491,7 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, seg = r_xprt->rx_ia.ri_ops->ro_map(r_xprt, seg, nsegs, true, &mr); if (IS_ERR(seg)) - return PTR_ERR(seg); + goto out_maperr; rpcrdma_mr_push(mr, &req->rl_registered); if (encode_rdma_segment(xdr, mr) < 0) @@ -498,6 +508,11 @@ rpcrdma_encode_reply_chunk(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, *segcount = cpu_to_be32(nchunks); return 0; + +out_maperr: + if (PTR_ERR(seg) == -EAGAIN) + xprt_wait_for_buffer_space(rqst->rq_task, NULL); + return PTR_ERR(seg); } /** @@ -724,8 +739,8 @@ rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt, * Returns: * %0 if the RPC was sent successfully, * %-ENOTCONN if the connection was lost, - * %-EAGAIN if not enough pages are available for on-demand reply buffer, - * %-ENOBUFS if no MRs are available to register chunks, + * %-EAGAIN if the caller should call again with the same arguments, + * %-ENOBUFS if the caller should call again after a delay, * %-EMSGSIZE if the transport header is too small, * %-EIO if a permanent problem occurred while marshaling. */ @@ -868,10 +883,7 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst) return 0; out_err: - if (ret != -ENOBUFS) { - pr_err("rpcrdma: header marshaling failed (%d)\n", ret); - r_xprt->rx_stats.failed_marshal_count++; - } + r_xprt->rx_stats.failed_marshal_count++; return ret; } @@ -1366,7 +1378,7 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep) trace_xprtrdma_reply(rqst->rq_task, rep, req, credits); - queue_work_on(req->rl_cpu, rpcrdma_receive_wq, &rep->rr_work); + queue_work(rpcrdma_receive_wq, &rep->rr_work); return; out_badstatus: diff --git a/net/sunrpc/xprtrdma/transport.c b/net/sunrpc/xprtrdma/transport.c index 4b1ecfe979cf..cc1aad325496 100644 --- a/net/sunrpc/xprtrdma/transport.c +++ b/net/sunrpc/xprtrdma/transport.c @@ -52,7 +52,6 @@ #include <linux/slab.h> #include <linux/seq_file.h> #include <linux/sunrpc/addr.h> -#include <linux/smp.h> #include "xprt_rdma.h" @@ -237,8 +236,6 @@ rpcrdma_connect_worker(struct work_struct *work) struct rpc_xprt *xprt = &r_xprt->rx_xprt; spin_lock_bh(&xprt->transport_lock); - if (++xprt->connect_cookie == 0) /* maintain a reserved value */ - ++xprt->connect_cookie; if (ep->rep_connected > 0) { if (!xprt_test_and_set_connected(xprt)) xprt_wake_pending_tasks(xprt, 0); @@ -540,29 +537,6 @@ xprt_rdma_connect(struct rpc_xprt *xprt, struct rpc_task *task) } } -/* Allocate a fixed-size buffer in which to construct and send the - * RPC-over-RDMA header for this request. - */ -static bool -rpcrdma_get_rdmabuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, - gfp_t flags) -{ - size_t size = RPCRDMA_HDRBUF_SIZE; - struct rpcrdma_regbuf *rb; - - if (req->rl_rdmabuf) - return true; - - rb = rpcrdma_alloc_regbuf(size, DMA_TO_DEVICE, flags); - if (IS_ERR(rb)) - return false; - - r_xprt->rx_stats.hardway_register_count += size; - req->rl_rdmabuf = rb; - xdr_buf_init(&req->rl_hdrbuf, rb->rg_base, rdmab_length(rb)); - return true; -} - static bool rpcrdma_get_sendbuf(struct rpcrdma_xprt *r_xprt, struct rpcrdma_req *req, size_t size, gfp_t flags) @@ -644,15 +618,11 @@ xprt_rdma_allocate(struct rpc_task *task) if (RPC_IS_SWAPPER(task)) flags = __GFP_MEMALLOC | GFP_NOWAIT | __GFP_NOWARN; - if (!rpcrdma_get_rdmabuf(r_xprt, req, flags)) - goto out_fail; if (!rpcrdma_get_sendbuf(r_xprt, req, rqst->rq_callsize, flags)) goto out_fail; if (!rpcrdma_get_recvbuf(r_xprt, req, rqst->rq_rcvsize, flags)) goto out_fail; - req->rl_cpu = smp_processor_id(); - req->rl_connect_cookie = 0; /* our reserved value */ rpcrdma_set_xprtdata(rqst, req); rqst->rq_buffer = req->rl_sendbuf->rg_base; rqst->rq_rbuffer = req->rl_recvbuf->rg_base; @@ -694,7 +664,8 @@ xprt_rdma_free(struct rpc_task *task) * Returns: * %0 if the RPC message has been sent * %-ENOTCONN if the caller should reconnect and call again - * %-ENOBUFS if the caller should call again later + * %-EAGAIN if the caller should call again + * %-ENOBUFS if the caller should call again after a delay * %-EIO if a permanent error occurred and the request was not * sent. Do not try to send this message again. */ @@ -723,9 +694,9 @@ xprt_rdma_send_request(struct rpc_task *task) rpcrdma_recv_buffer_get(req); /* Must suppress retransmit to maintain credits */ - if (req->rl_connect_cookie == xprt->connect_cookie) + if (rqst->rq_connect_cookie == xprt->connect_cookie) goto drop_connection; - req->rl_connect_cookie = xprt->connect_cookie; + rqst->rq_xtime = ktime_get(); __set_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags); if (rpcrdma_ep_post(&r_xprt->rx_ia, &r_xprt->rx_ep, req)) @@ -733,6 +704,12 @@ xprt_rdma_send_request(struct rpc_task *task) rqst->rq_xmit_bytes_sent += rqst->rq_snd_buf.len; rqst->rq_bytes_sent = 0; + + /* An RPC with no reply will throw off credit accounting, + * so drop the connection to reset the credit grant. + */ + if (!rpc_reply_expected(task)) + goto drop_connection; return 0; failed_marshal: diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index e6f84a6434a0..fe5eaca2d197 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -250,11 +250,11 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) wait_for_completion(&ia->ri_remove_done); ia->ri_id = NULL; - ia->ri_pd = NULL; ia->ri_device = NULL; /* Return 1 to ensure the core destroys the id. */ return 1; case RDMA_CM_EVENT_ESTABLISHED: + ++xprt->rx_xprt.connect_cookie; connstate = 1; rpcrdma_update_connect_private(xprt, &event->param.conn); goto connected; @@ -273,6 +273,7 @@ rpcrdma_conn_upcall(struct rdma_cm_id *id, struct rdma_cm_event *event) connstate = -EAGAIN; goto connected; case RDMA_CM_EVENT_DISCONNECTED: + ++xprt->rx_xprt.connect_cookie; connstate = -ECONNABORTED; connected: xprt->rx_buf.rb_credits = 1; @@ -445,7 +446,9 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia) ia->ri_id->qp = NULL; } ib_free_cq(ep->rep_attr.recv_cq); + ep->rep_attr.recv_cq = NULL; ib_free_cq(ep->rep_attr.send_cq); + ep->rep_attr.send_cq = NULL; /* The ULP is responsible for ensuring all DMA * mappings and MRs are gone. @@ -458,6 +461,8 @@ rpcrdma_ia_remove(struct rpcrdma_ia *ia) rpcrdma_dma_unmap_regbuf(req->rl_recvbuf); } rpcrdma_mrs_destroy(buf); + ib_dealloc_pd(ia->ri_pd); + ia->ri_pd = NULL; /* Allow waiters to continue */ complete(&ia->ri_remove_done); @@ -589,11 +594,8 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, /* Client offers RDMA Read but does not initiate */ ep->rep_remote_cma.initiator_depth = 0; - if (ia->ri_device->attrs.max_qp_rd_atom > 32) /* arbitrary but <= 255 */ - ep->rep_remote_cma.responder_resources = 32; - else - ep->rep_remote_cma.responder_resources = - ia->ri_device->attrs.max_qp_rd_atom; + ep->rep_remote_cma.responder_resources = + min_t(int, U8_MAX, ia->ri_device->attrs.max_qp_rd_atom); /* Limit transport retries so client can detect server * GID changes quickly. RPC layer handles re-establishing @@ -628,14 +630,16 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) { cancel_delayed_work_sync(&ep->rep_connect_worker); - if (ia->ri_id->qp) { + if (ia->ri_id && ia->ri_id->qp) { rpcrdma_ep_disconnect(ep, ia); rdma_destroy_qp(ia->ri_id); ia->ri_id->qp = NULL; } - ib_free_cq(ep->rep_attr.recv_cq); - ib_free_cq(ep->rep_attr.send_cq); + if (ep->rep_attr.recv_cq) + ib_free_cq(ep->rep_attr.recv_cq); + if (ep->rep_attr.send_cq) + ib_free_cq(ep->rep_attr.send_cq); } /* Re-establish a connection after a device removal event. @@ -1024,7 +1028,7 @@ rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt) LIST_HEAD(free); LIST_HEAD(all); - for (count = 0; count < 32; count++) { + for (count = 0; count < 3; count++) { struct rpcrdma_mr *mr; int rc; @@ -1049,8 +1053,9 @@ rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt) list_splice(&all, &buf->rb_all); r_xprt->rx_stats.mrs_allocated += count; spin_unlock(&buf->rb_mrlock); - trace_xprtrdma_createmrs(r_xprt, count); + + xprt_write_space(&r_xprt->rx_xprt); } static void @@ -1068,17 +1073,27 @@ struct rpcrdma_req * rpcrdma_create_req(struct rpcrdma_xprt *r_xprt) { struct rpcrdma_buffer *buffer = &r_xprt->rx_buf; + struct rpcrdma_regbuf *rb; struct rpcrdma_req *req; req = kzalloc(sizeof(*req), GFP_KERNEL); if (req == NULL) return ERR_PTR(-ENOMEM); + rb = rpcrdma_alloc_regbuf(RPCRDMA_HDRBUF_SIZE, + DMA_TO_DEVICE, GFP_KERNEL); + if (IS_ERR(rb)) { + kfree(req); + return ERR_PTR(-ENOMEM); + } + req->rl_rdmabuf = rb; + xdr_buf_init(&req->rl_hdrbuf, rb->rg_base, rdmab_length(rb)); + req->rl_buffer = buffer; + INIT_LIST_HEAD(&req->rl_registered); + spin_lock(&buffer->rb_reqslock); list_add(&req->rl_all, &buffer->rb_allreqs); spin_unlock(&buffer->rb_reqslock); - req->rl_buffer = &r_xprt->rx_buf; - INIT_LIST_HEAD(&req->rl_registered); return req; } @@ -1535,7 +1550,6 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia, struct rpcrdma_req *req) { struct ib_send_wr *send_wr = &req->rl_sendctx->sc_wr; - struct ib_send_wr *send_wr_fail; int rc; if (req->rl_reply) { @@ -1554,7 +1568,7 @@ rpcrdma_ep_post(struct rpcrdma_ia *ia, --ep->rep_send_count; } - rc = ib_post_send(ia->ri_id->qp, send_wr, &send_wr_fail); + rc = ia->ri_ops->ro_send(ia, req); trace_xprtrdma_post_send(req, rc); if (rc) return -ENOTCONN; diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 69883a960a3f..3d3b423fa9c1 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -334,8 +334,6 @@ enum { struct rpcrdma_buffer; struct rpcrdma_req { struct list_head rl_list; - int rl_cpu; - unsigned int rl_connect_cookie; struct rpcrdma_buffer *rl_buffer; struct rpcrdma_rep *rl_reply; struct xdr_stream rl_stream; @@ -474,6 +472,8 @@ struct rpcrdma_memreg_ops { (*ro_map)(struct rpcrdma_xprt *, struct rpcrdma_mr_seg *, int, bool, struct rpcrdma_mr **); + int (*ro_send)(struct rpcrdma_ia *ia, + struct rpcrdma_req *req); void (*ro_reminv)(struct rpcrdma_rep *rep, struct list_head *mrs); void (*ro_unmap_sync)(struct rpcrdma_xprt *, |