diff options
Diffstat (limited to 'net/sunrpc/xprtrdma/rpc_rdma.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/rpc_rdma.c | 73 |
1 files changed, 27 insertions, 46 deletions
diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index e8adad33d0bb..c8ae983c6cc0 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* * Copyright (c) 2014-2017 Oracle. All rights reserved. * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. @@ -46,22 +47,17 @@ * to the Linux RPC framework lives. */ -#include "xprt_rdma.h" - #include <linux/highmem.h> +#include <linux/sunrpc/svc_rdma.h> + +#include "xprt_rdma.h" +#include <trace/events/rpcrdma.h> + #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) # define RPCDBG_FACILITY RPCDBG_TRANS #endif -static const char transfertypes[][12] = { - "inline", /* no chunks */ - "read list", /* some argument via rdma read */ - "*read list", /* entire request via rdma read */ - "write list", /* some result via rdma write */ - "reply chunk" /* entire reply via rdma write */ -}; - /* Returns size of largest RPC-over-RDMA header in a Call message * * The largest Call header contains a full-size Read list and a @@ -230,7 +226,7 @@ rpcrdma_convert_iovs(struct rpcrdma_xprt *r_xprt, struct xdr_buf *xdrbuf, */ *ppages = alloc_page(GFP_ATOMIC); if (!*ppages) - return -EAGAIN; + return -ENOBUFS; } seg->mr_page = *ppages; seg->mr_offset = (char *)page_base; @@ -365,7 +361,7 @@ 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)) - goto out_maperr; + return PTR_ERR(seg); rpcrdma_mr_push(mr, &req->rl_registered); if (encode_read_segment(xdr, mr, pos) < 0) @@ -377,11 +373,6 @@ 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 @@ -428,7 +419,7 @@ 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)) - goto out_maperr; + return PTR_ERR(seg); rpcrdma_mr_push(mr, &req->rl_registered); if (encode_rdma_segment(xdr, mr) < 0) @@ -445,11 +436,6 @@ 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 @@ -491,7 +477,7 @@ 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)) - goto out_maperr; + return PTR_ERR(seg); rpcrdma_mr_push(mr, &req->rl_registered); if (encode_rdma_segment(xdr, mr) < 0) @@ -508,11 +494,6 @@ 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); } /** @@ -709,7 +690,7 @@ rpcrdma_prepare_send_sges(struct rpcrdma_xprt *r_xprt, { req->rl_sendctx = rpcrdma_sendctx_get_locked(&r_xprt->rx_buf); if (!req->rl_sendctx) - return -ENOBUFS; + return -EAGAIN; req->rl_sendctx->sc_wr.num_sge = 0; req->rl_sendctx->sc_unmap_count = 0; req->rl_sendctx->sc_req = req; @@ -883,7 +864,15 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst) return 0; out_err: - r_xprt->rx_stats.failed_marshal_count++; + switch (ret) { + case -EAGAIN: + xprt_wait_for_buffer_space(rqst->rq_task, NULL); + break; + case -ENOBUFS: + break; + default: + r_xprt->rx_stats.failed_marshal_count++; + } return ret; } @@ -1026,8 +1015,6 @@ rpcrdma_is_bcall(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep) out_short: pr_warn("RPC/RDMA short backward direction call\n"); - if (rpcrdma_ep_post_recv(&r_xprt->rx_ia, rep)) - xprt_disconnect_done(&r_xprt->rx_xprt); return true; } #else /* CONFIG_SUNRPC_BACKCHANNEL */ @@ -1333,13 +1320,14 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep) u32 credits; __be32 *p; + --buf->rb_posted_receives; + if (rep->rr_hdrbuf.head[0].iov_len == 0) goto out_badstatus; + /* Fixed transport header fields */ xdr_init_decode(&rep->rr_stream, &rep->rr_hdrbuf, rep->rr_hdrbuf.head[0].iov_base); - - /* Fixed transport header fields */ p = xdr_inline_decode(&rep->rr_stream, 4 * sizeof(*p)); if (unlikely(!p)) goto out_shortreply; @@ -1378,17 +1366,10 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep) trace_xprtrdma_reply(rqst->rq_task, rep, req, credits); + rpcrdma_post_recvs(r_xprt, false); queue_work(rpcrdma_receive_wq, &rep->rr_work); return; -out_badstatus: - rpcrdma_recv_buffer_put(rep); - if (r_xprt->rx_ep.rep_connected == 1) { - r_xprt->rx_ep.rep_connected = -EIO; - rpcrdma_conn_func(&r_xprt->rx_ep); - } - return; - out_badversion: trace_xprtrdma_reply_vers(rep); goto repost; @@ -1408,7 +1389,7 @@ out_shortreply: * receive buffer before returning. */ repost: - r_xprt->rx_stats.bad_reply_count++; - if (rpcrdma_ep_post_recv(&r_xprt->rx_ia, rep)) - rpcrdma_recv_buffer_put(rep); + rpcrdma_post_recvs(r_xprt, false); +out_badstatus: + rpcrdma_recv_buffer_put(rep); } |