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xprtrdma: Add trace points in the RPC Reply handler paths

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Signed-off-by: Chuck Lever <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>
This commit is contained in:
Chuck Lever 2017-12-20 16:30:48 -05:00 • committed by Anna Schumaker
commit b4a7f91c1d
3 changed files with 171 additions and 19 deletions
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17
net/sunrpc/xprtrdma/rpc_rdma.c
View file

@ -1278,8 +1278,7 @@ out:
* being marshaled.
*/
out_badheader:
dprintk("RPC: %5u %s: invalid rpcrdma reply (type %u)\n",
rqst->rq_task->tk_pid, __func__, be32_to_cpu(rep->rr_proc));
trace_xprtrdma_reply_hdr(rep);
r_xprt->rx_stats.bad_reply_count++;
status = -EIO;
goto out;
@ -1323,6 +1322,7 @@ void rpcrdma_deferred_completion(struct work_struct *work)
struct rpcrdma_req *req = rpcr_to_rdmar(rep->rr_rqst);
struct rpcrdma_xprt *r_xprt = rep->rr_rxprt;
trace_xprtrdma_defer_cmp(rep);
if (rep->rr_wc_flags & IB_WC_WITH_INVALIDATE)
r_xprt->rx_ia.ri_ops->ro_reminv(rep, &req->rl_registered);
rpcrdma_release_rqst(r_xprt, req);
@ -1344,8 +1344,6 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep)
u32 credits;
__be32 *p;
dprintk("RPC: %s: incoming rep %p\n", __func__, rep);
if (rep->rr_hdrbuf.head[0].iov_len == 0)
goto out_badstatus;
@ -1389,8 +1387,7 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep)
rep->rr_rqst = rqst;
clear_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags);
dprintk("RPC: %s: reply %p completes request %p (xid 0x%08x)\n",
__func__, rep, req, be32_to_cpu(rep->rr_xid));
trace_xprtrdma_reply(rqst->rq_task, rep, req, credits);
queue_work_on(req->rl_cpu, rpcrdma_receive_wq, &rep->rr_work);
return;
@ -1404,8 +1401,7 @@ out_badstatus:
return;
out_badversion:
dprintk("RPC: %s: invalid version %d\n",
__func__, be32_to_cpu(rep->rr_vers));
trace_xprtrdma_reply_vers(rep);
goto repost;
/* The RPC transaction has already been terminated, or the header
@ -1413,12 +1409,11 @@ out_badversion:
*/
out_norqst:
spin_unlock(&xprt->recv_lock);
dprintk("RPC: %s: no match for incoming xid 0x%08x\n",
__func__, be32_to_cpu(rep->rr_xid));
trace_xprtrdma_reply_rqst(rep);
goto repost;
out_shortreply:
dprintk("RPC: %s: short/invalid reply\n", __func__);
trace_xprtrdma_reply_short(rep);
/* If no pending RPC transaction was matched, post a replacement
* receive buffer before returning.

11
net/sunrpc/xprtrdma/verbs.c
View file

@ -156,13 +156,11 @@ rpcrdma_wc_receive(struct ib_cq *cq, struct ib_wc *wc)
rr_cqe);
/* WARNING: Only wr_id and status are reliable at this point */
trace_xprtrdma_wc_receive(rep, wc);
if (wc->status != IB_WC_SUCCESS)
goto out_fail;
/* status == SUCCESS means all fields in wc are trustworthy */
dprintk("RPC: %s: rep %p opcode 'recv', length %u: success\n",
__func__, rep, wc->byte_len);
rpcrdma_set_xdrlen(&rep->rr_hdrbuf, wc->byte_len);
rep->rr_wc_flags = wc->wc_flags;
rep->rr_inv_rkey = wc->ex.invalidate_rkey;
@ -1576,17 +1574,14 @@ rpcrdma_ep_post_recv(struct rpcrdma_ia *ia,
if (!rpcrdma_dma_map_regbuf(ia, rep->rr_rdmabuf))
goto out_map;
rc = ib_post_recv(ia->ri_id->qp, &rep->rr_recv_wr, &recv_wr_fail);
trace_xprtrdma_post_recv(rep, rc);
if (rc)
goto out_postrecv;
return -ENOTCONN;
return 0;
out_map:
pr_err("rpcrdma: failed to DMA map the Receive buffer\n");
return -EIO;
out_postrecv:
pr_err("rpcrdma: ib_post_recv returned %i\n", rc);
return -ENOTCONN;
}
/**