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svcrdma: Record send_ctxt completion ID in trace_svcrdma_post_send()

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First, refactor: Dereference the svc_rdma_send_ctxt inside
svc_rdma_send() instead of at every call site.

Then, it can be passed into trace_svcrdma_post_send() to get the
proper completion ID.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-04-29 11:05:33 -04:00
parent 3ac56c2fb1
commit 17f70f8dd5
4 changed files with 20 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/sunrpc/svc_rdma.h
View File

@ -196,7 +196,8 @@ extern struct svc_rdma_send_ctxt *
svc_rdma_send_ctxt_get(struct svcxprt_rdma *rdma);
extern void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt);
extern int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr);
extern int svc_rdma_send(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *ctxt);
extern int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma,
struct svc_rdma_send_ctxt *sctxt,
const struct svc_rdma_recv_ctxt *rctxt,

18
include/trace/events/rpcrdma.h
View File

@ -1839,27 +1839,31 @@ DECLARE_EVENT_CLASS(svcrdma_sendcomp_event,
TRACE_EVENT(svcrdma_post_send,
TP_PROTO(
const struct ib_send_wr *wr
const struct svc_rdma_send_ctxt *ctxt
),
TP_ARGS(wr),
TP_ARGS(ctxt),
TP_STRUCT__entry(
__field(const void *, cqe)
__field(u32, cq_id)
__field(int, completion_id)
__field(unsigned int, num_sge)
__field(u32, inv_rkey)
),
TP_fast_assign(
__entry->cqe = wr->wr_cqe;
const struct ib_send_wr *wr = &ctxt->sc_send_wr;
__entry->cq_id = ctxt->sc_cid.ci_queue_id;
__entry->completion_id = ctxt->sc_cid.ci_completion_id;
__entry->num_sge = wr->num_sge;
__entry->inv_rkey = (wr->opcode == IB_WR_SEND_WITH_INV) ?
wr->ex.invalidate_rkey : 0;
),
TP_printk("cqe=%p num_sge=%u inv_rkey=0x%08x",
__entry->cqe, __entry->num_sge,
__entry->inv_rkey
TP_printk("cq_id=%u cid=%d num_sge=%u inv_rkey=0x%08x",
__entry->cq_id, __entry->completion_id,
__entry->num_sge, __entry->inv_rkey
)
);

2
net/sunrpc/xprtrdma/svc_rdma_backchannel.c
View File

@ -87,7 +87,7 @@ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma,
*/
get_page(virt_to_page(rqst->rq_buffer));
ctxt->sc_send_wr.opcode = IB_WR_SEND;
return svc_rdma_send(rdma, &ctxt->sc_send_wr);
return svc_rdma_send(rdma, ctxt);
}
/* Server-side transport endpoint wants a whole page for its send

11
net/sunrpc/xprtrdma/svc_rdma_sendto.c
View File

@ -298,13 +298,14 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc)
/**
* svc_rdma_send - Post a single Send WR
* @rdma: transport on which to post the WR
* @wr: prepared Send WR to post
* @ctxt: send ctxt with a Send WR ready to post
*
* Returns zero the Send WR was posted successfully. Otherwise, a
* negative errno is returned.
*/
int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr)
int svc_rdma_send(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt)
{
struct ib_send_wr *wr = &ctxt->sc_send_wr;
int ret;
might_sleep();
@ -330,7 +331,7 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct ib_send_wr *wr)
}
svc_xprt_get(&rdma->sc_xprt);
trace_svcrdma_post_send(wr);
trace_svcrdma_post_send(ctxt);
ret = ib_post_send(rdma->sc_qp, wr, NULL);
if (ret)
break;
@ -805,7 +806,7 @@ static int svc_rdma_send_reply_msg(struct svcxprt_rdma *rdma,
} else {
sctxt->sc_send_wr.opcode = IB_WR_SEND;
}
return svc_rdma_send(rdma, &sctxt->sc_send_wr);
return svc_rdma_send(rdma, sctxt);
}
/**
@ -869,7 +870,7 @@ void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma,
sctxt->sc_send_wr.num_sge = 1;
sctxt->sc_send_wr.opcode = IB_WR_SEND;
sctxt->sc_sges[0].length = sctxt->sc_hdrbuf.len;
if (svc_rdma_send(rdma, &sctxt->sc_send_wr))
if (svc_rdma_send(rdma, sctxt))
goto put_ctxt;
return;