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svcrdma: Introduce Send completion IDs

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Set up a completion ID in each svc_rdma_send_ctxt. The ID is used
to match an incoming Send completion to a transport and to a
previous ib_post_send().

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-04-30 13:47:07 -04:00
parent 007140ee9b
commit 3ac56c2fb1
3 changed files with 15 additions and 4 deletions
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2
include/linux/sunrpc/svc_rdma.h
View File

@ -151,6 +151,8 @@ struct svc_rdma_recv_ctxt {
struct svc_rdma_send_ctxt {
struct list_head sc_list;
struct rpc_rdma_cid sc_cid;
struct ib_send_wr sc_send_wr;
struct ib_cqe sc_cqe;
struct xdr_buf sc_hdrbuf;

2
include/trace/events/rpcrdma.h
View File

@ -1863,7 +1863,7 @@ TRACE_EVENT(svcrdma_post_send,
)
);
DEFINE_SENDCOMP_EVENT(send);
DEFINE_COMPLETION_EVENT(svcrdma_wc_send);
TRACE_EVENT(svcrdma_post_recv,
TP_PROTO(

15
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@ -122,6 +122,13 @@ svc_rdma_next_send_ctxt(struct list_head *list)
sc_list);
}
static void svc_rdma_send_cid_init(struct svcxprt_rdma *rdma,
struct rpc_rdma_cid *cid)
{
cid->ci_queue_id = rdma->sc_sq_cq->res.id;
cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids);
}
static struct svc_rdma_send_ctxt *
svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
{
@ -144,6 +151,8 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma)
if (ib_dma_mapping_error(rdma->sc_pd->device, addr))
goto fail2;
svc_rdma_send_cid_init(rdma, &ctxt->sc_cid);
ctxt->sc_send_wr.next = NULL;
ctxt->sc_send_wr.wr_cqe = &ctxt->sc_cqe;
ctxt->sc_send_wr.sg_list = ctxt->sc_sges;
@ -268,14 +277,14 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
{
struct svcxprt_rdma *rdma = cq->cq_context;
struct ib_cqe *cqe = wc->wr_cqe;
struct svc_rdma_send_ctxt *ctxt;
struct svc_rdma_send_ctxt *ctxt =
container_of(cqe, struct svc_rdma_send_ctxt, sc_cqe);
trace_svcrdma_wc_send(wc);
trace_svcrdma_wc_send(wc, &ctxt->sc_cid);
atomic_inc(&rdma->sc_sq_avail);
wake_up(&rdma->sc_send_wait);
ctxt = container_of(cqe, struct svc_rdma_send_ctxt, sc_cqe);
svc_rdma_send_ctxt_put(rdma, ctxt);
if (unlikely(wc->status != IB_WC_SUCCESS)) {