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Commit 94371473 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
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tools lib traceevent: Add cfg80211 plugin 



Adding cfg80211 plugin.

This plugin adds handler for __le16_to_cpup function
t properly parse following tracepoint events:
  cfg80211:cfg80211_tx_mlme_mgmt
  cfg80211:cfg80211_rx_mlme_mgmt
  cfg80211:cfg80211_rx_unprot_mlme_mgmt

The diff of 'perf script' output generated by old and new code:
(data was generated by 'perf record -e 'cfg80211:*' -a')

  --- script.cfg80211.old
  +++ script.cfg80211.new
  -        ifconfig  2705 [003]   662.896560: cfg80211:cfg80211_tx_mlme_mgmt: [FAILED TO PARSE] name=wlan0 ifindex=3 frame=ARRAY[c0, 00, 00, 00, 00, 3a, 98, a0, 30, 51, 10, 0b, a9, c6, f4, 74, 00, 3a, 98, a0, 30, 51, 00, 00, 03, 00]
  +        ifconfig  2705 [003]   662.896560: cfg80211:cfg80211_tx_mlme_mgmt: netdev:wlan0(3), ftype:0xc0
  -   kworker/u16:0  1697 [002]   664.808210: cfg80211:cfg80211_rx_mlme_mgmt: [FAILED TO PARSE] name=wlan0 ifindex=3 frame=ARRAY[b0, 00, da, 00, 10, 0b, a9, c6, f4, 74, d8, 24, bd, a1, 26, 31, d8, 24, bd, a1, 26, 31, 10, b7, 00, 00, 02, 00, 00, 00]
  +   kworker/u16:0  1697 [002]   664.808210: cfg80211:cfg80211_rx_mlme_mgmt: netdev:wlan0(3), ftype:0xb0

Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1386076182-14484-22-git-send-email-jolsa@redhat.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 04010929

tools/lib/traceevent/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -221,6 +221,7 @@ PLUGIN_OBJS += plugin_sched_switch.o 
PLUGIN_OBJS += plugin_function.o

PLUGIN_OBJS += plugin_xen.o

PLUGIN_OBJS += plugin_scsi.o

PLUGIN_OBJS += plugin_cfg80211.o



PLUGINS := $(PLUGIN_OBJS:.o=.so)

tools/lib/traceevent/plugin_cfg80211.c

0 → 100644
+24 −0
Original line number Diff line number Diff line 
#include <stdio.h>

#include <string.h>

#include <inttypes.h>

#include <endian.h>

#include "event-parse.h"



static unsigned long long

process___le16_to_cpup(struct trace_seq *s,

		       unsigned long long *args)

{

	uint16_t *val = (uint16_t *) args[0];

	return val ? (long long) le16toh(*val) : 0;

}



int PEVENT_PLUGIN_LOADER(struct pevent *pevent)

{

	pevent_register_print_function(pevent,

				       process___le16_to_cpup,

				       PEVENT_FUNC_ARG_INT,

				       "__le16_to_cpup",

				       PEVENT_FUNC_ARG_PTR,

				       PEVENT_FUNC_ARG_VOID);

	return 0;

}