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| author | Chuck Lever <chuck.lever@oracle.com> | 2020-03-13 10:42:11 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2020-11-30 13:00:22 -0500 |
| commit | 9d0b09d5ef0c842592a5df3a5b8b59124485ff1b (patch) | |
| tree | 411c71caffd1c556ee4f7f4516a308cc03c63e02 /net/sunrpc/xprtrdma/svc_rdma_backchannel.c | |
| parent | 6911f3e10cd9792ccfd6980da91a171f54984692 (diff) | |
| download | lwn-9d0b09d5ef0c842592a5df3a5b8b59124485ff1b.tar.gz lwn-9d0b09d5ef0c842592a5df3a5b8b59124485ff1b.zip | |
svcrdma: Support multiple write chunks when pulling up
When counting the number of SGEs needed to construct a Send request,
do not count result payloads. And, when copying the Reply message
into the pull-up buffer, result payloads are not to be copied to the
Send buffer.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/svc_rdma_backchannel.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_backchannel.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c index 5e7c4ba9e147..63f8be974df2 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c +++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c @@ -74,11 +74,17 @@ out_unlock: */ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma, struct rpc_rqst *rqst, - struct svc_rdma_send_ctxt *ctxt) + struct svc_rdma_send_ctxt *sctxt) { + struct svc_rdma_recv_ctxt *rctxt; int ret; - ret = svc_rdma_map_reply_msg(rdma, ctxt, NULL, &rqst->rq_snd_buf); + rctxt = svc_rdma_recv_ctxt_get(rdma); + if (!rctxt) + return -EIO; + + ret = svc_rdma_map_reply_msg(rdma, sctxt, rctxt, &rqst->rq_snd_buf); + svc_rdma_recv_ctxt_put(rdma, rctxt); if (ret < 0) return -EIO; @@ -86,8 +92,8 @@ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma, * the rq_buffer before all retransmits are complete. */ get_page(virt_to_page(rqst->rq_buffer)); - ctxt->sc_send_wr.opcode = IB_WR_SEND; - return svc_rdma_send(rdma, ctxt); + sctxt->sc_send_wr.opcode = IB_WR_SEND; + return svc_rdma_send(rdma, sctxt); } /* Server-side transport endpoint wants a whole page for its send |