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SUNRPC: Fix tracepoint storage issues with svc_recv and svc_rqst_status 

There is no guarantee that either the request or the svc_xprt exist
by the time we get round to printing the trace message.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2017-10-10 17:31:42 -04:00 committed by J. Bruce Fields
parent a133552a00
commit e9d4bf219c
1 changed files with 10 additions and 7 deletions
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17
include/trace/events/sunrpc.h
View File

@ -455,20 +455,22 @@ TRACE_EVENT(svc_recv,
TP_ARGS(rqst, status),
TP_STRUCT__entry(
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, status)
__field(unsigned long, flags)
__dynamic_array(unsigned char, addr, rqst->rq_addrlen)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = status > 0 ? rqst->rq_xid : 0;
__entry->status = status;
__entry->flags = rqst->rq_flags;
memcpy(__get_dynamic_array(addr),
&rqst->rq_addr, rqst->rq_addrlen);
),
TP_printk("addr=%pIScp xid=0x%x status=%d flags=%s", __entry->addr,
TP_printk("addr=%pIScp xid=0x%x status=%d flags=%s",
(struct sockaddr *)__get_dynamic_array(addr),
be32_to_cpu(__entry->xid), __entry->status,
show_rqstp_flags(__entry->flags))
);
@ -513,22 +515,23 @@ DECLARE_EVENT_CLASS(svc_rqst_status,
TP_ARGS(rqst, status),
TP_STRUCT__entry(
__field(struct sockaddr *, addr)
__field(__be32, xid)
__field(int, dropme)
__field(int, status)
__field(unsigned long, flags)
__dynamic_array(unsigned char, addr, rqst->rq_addrlen)
),
TP_fast_assign(
__entry->addr = (struct sockaddr *)&rqst->rq_addr;
__entry->xid = rqst->rq_xid;
__entry->status = status;
__entry->flags = rqst->rq_flags;
memcpy(__get_dynamic_array(addr),
&rqst->rq_addr, rqst->rq_addrlen);
),
TP_printk("addr=%pIScp rq_xid=0x%x status=%d flags=%s",
__entry->addr, be32_to_cpu(__entry->xid),
(struct sockaddr *)__get_dynamic_array(addr),
be32_to_cpu(__entry->xid),
__entry->status, show_rqstp_flags(__entry->flags))
);