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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: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Fixes: 83a712e0af "sunrpc: add some tracepoints around ..."
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2016-06-24 10:55:44 -04:00 committed by J. Bruce Fields
parent 6343a21208
commit db1bb44c4c
1 changed files with 34 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
include/trace/events/sunrpc.h
View File

@ -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 */