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SUNRPC: Move the svc_xdr_recvfrom() tracepoint

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Commit c509f15a58 ("SUNRPC: Split the xdr_buf event class") added
display of the rqst's XID to the svc_xdr_buf_class. However, when
the recvfrom tracepoint fires, rq_xid has yet to be filled in with
the current XID. So it ends up recording the previous XID that was
handled by that svc_rqst.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2020-07-24 14:39:00 -04:00
parent 71fd721839
commit 156708adf2
2 changed files with 1 additions and 27 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

24
include/trace/events/sunrpc.h
View file

@ -1500,30 +1500,6 @@ SVC_RQST_FLAG_LIST
#define show_rqstp_flags(flags) \
__print_flags(flags, "|", SVC_RQST_FLAG_LIST)
TRACE_EVENT(svc_recv,
TP_PROTO(struct svc_rqst *rqst, int len),
TP_ARGS(rqst, len),
TP_STRUCT__entry(
__field(u32, xid)
__field(int, len)
__field(unsigned long, flags)
__string(addr, rqst->rq_xprt->xpt_remotebuf)
),
TP_fast_assign(
__entry->xid = be32_to_cpu(rqst->rq_xid);
__entry->len = len;
__entry->flags = rqst->rq_flags;
__assign_str(addr, rqst->rq_xprt->xpt_remotebuf);
),
TP_printk("addr=%s xid=0x%08x len=%d flags=%s",
__get_str(addr), __entry->xid, __entry->len,
show_rqstp_flags(__entry->flags))
);
TRACE_DEFINE_ENUM(SVC_GARBAGE);
TRACE_DEFINE_ENUM(SVC_SYSERR);
TRACE_DEFINE_ENUM(SVC_VALID);

4
net/sunrpc/svc_xprt.c
View file

@ -813,8 +813,6 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt)
len = svc_deferred_recv(rqstp);
else
len = xprt->xpt_ops->xpo_recvfrom(rqstp);
if (len > 0)
trace_svc_xdr_recvfrom(rqstp, &rqstp->rq_arg);
rqstp->rq_stime = ktime_get();
rqstp->rq_reserved = serv->sv_max_mesg;
atomic_add(rqstp->rq_reserved, &xprt->xpt_reserved);
@ -868,7 +866,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
if (serv->sv_stats)
serv->sv_stats->netcnt++;
trace_svc_recv(rqstp, len);
trace_svc_xdr_recvfrom(rqstp, &rqstp->rq_arg);
return len;
out_release:
rqstp->rq_res.len = 0;