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Commit db1bb44c authored by Trond Myklebust's avatar Trond Myklebust Committed by J. Bruce Fields
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SUNRPC: Don't allocate a full sockaddr_storage for tracing 



We're always tracing IPv4 or IPv6 addresses, so we can save a lot
of space on the ringbuffer by allocating the correct sockaddr size.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Fixes: 83a712e0 "sunrpc: add some tracepoints around ..."
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 6343a212

include/trace/events/sunrpc.h

+34 −13
Original line number Diff line number Diff line
@@ -529,20 +529,27 @@ TRACE_EVENT(svc_xprt_do_enqueue, 


	TP_STRUCT__entry(

		__field(struct svc_xprt *, xprt)

		__field_struct(struct sockaddr_storage, ss)

		__field(int, pid)

		__field(unsigned long, flags)

		__dynamic_array(unsigned char, addr, xprt != NULL ?

			xprt->xpt_remotelen : 0)

	),



	TP_fast_assign(

		__entry->xprt = xprt;

		xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss));

		__entry->pid = rqst? rqst->rq_task->pid : 0;

		__entry->flags = xprt ? xprt->xpt_flags : 0;

		if (xprt) {

			memcpy(__get_dynamic_array(addr),

				&xprt->xpt_remote,

				xprt->xpt_remotelen);

			__entry->flags = xprt->xpt_flags;

		} else

			__entry->flags = 0;

	),



	TP_printk("xprt=0x%p addr=%pIScp pid=%d flags=%s", __entry->xprt,

		(struct sockaddr *)&__entry->ss,

		__get_dynamic_array_len(addr) != 0 ?

			(struct sockaddr *)__get_dynamic_array(addr) : NULL,

		__entry->pid, show_svc_xprt_flags(__entry->flags))

);
@@ -553,18 +560,25 @@ TRACE_EVENT(svc_xprt_dequeue, 


	TP_STRUCT__entry(

		__field(struct svc_xprt *, xprt)

		__field_struct(struct sockaddr_storage, ss)

		__field(unsigned long, flags)

		__dynamic_array(unsigned char, addr, xprt != NULL ?

			xprt->xpt_remotelen : 0)

	),



	TP_fast_assign(

		__entry->xprt = xprt,

		xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss));

		__entry->flags = xprt ? xprt->xpt_flags : 0;

		__entry->xprt = xprt;

		if (xprt) {

			memcpy(__get_dynamic_array(addr),

					&xprt->xpt_remote,

					xprt->xpt_remotelen);

			__entry->flags = xprt->xpt_flags;

		} else

			__entry->flags = 0;

	),



	TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt,

		(struct sockaddr *)&__entry->ss,

		__get_dynamic_array_len(addr) != 0 ?

			(struct sockaddr *)__get_dynamic_array(addr) : NULL,

		show_svc_xprt_flags(__entry->flags))

);
@@ -592,19 +606,26 @@ TRACE_EVENT(svc_handle_xprt, 
	TP_STRUCT__entry(

		__field(struct svc_xprt *, xprt)

		__field(int, len)

		__field_struct(struct sockaddr_storage, ss)

		__field(unsigned long, flags)

		__dynamic_array(unsigned char, addr, xprt != NULL ?

			xprt->xpt_remotelen : 0)

	),



	TP_fast_assign(

		__entry->xprt = xprt;

		xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss));

		__entry->len = len;

		__entry->flags = xprt ? xprt->xpt_flags : 0;

		if (xprt) {

			memcpy(__get_dynamic_array(addr),

					&xprt->xpt_remote,

					xprt->xpt_remotelen);

			__entry->flags = xprt->xpt_flags;

		} else

			__entry->flags = 0;

	),



	TP_printk("xprt=0x%p addr=%pIScp len=%d flags=%s", __entry->xprt,

		(struct sockaddr *)&__entry->ss,

		__get_dynamic_array_len(addr) != 0 ?

			(struct sockaddr *)__get_dynamic_array(addr) : NULL,

		__entry->len, show_svc_xprt_flags(__entry->flags))

);

#endif /* _TRACE_SUNRPC_H */