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tools lib traceevent: Add mac80211 plugin

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Backporting mac80211 plugin.

Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb):
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

This plugin adds changed field resolving for
mac80211:drv_bss_info_changed tracepoint event.

The diff of 'perf script' output generated by old and new code:
(data was generated by 'perf record -e 'mac80211:drv_bss_info_changed' -a')

  --- script.mac80211.old
  +++ script.mac80211.new
  -        ifconfig  3711 [000]  1290.446492: mac80211:drv_bss_info_changed: phy0 vif:wlan0(2) changed:0x309f
  +        ifconfig  3711 [000]  1290.446492: mac80211:drv_bss_info_changed: phy0 vif:wlan0(2)
  +                                                                 assoc:0 aid:2 cts:0 shortpre:0 shortslot:0 dtimper:1
  +                                                                 bcnint:102 assoc_cap:0x431 basic_rates:0xf enable_beacon:0
  +                                                                 ht_operation_mode:0

Omitting the mac80211:drv_config tracepoint handling because the kernel
tracepoint changed its prototype and the plugin handler is no longer
working.

Signed-off-by: Jiri 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/1386076182-14484-17-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2013-12-03 14:09:30 +01:00 committed by Arnaldo Carvalho de Melo
parent 35d79f9ff8
commit de705e2e88
2 changed files with 96 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/lib/traceevent/Makefile
View File

@ -216,6 +216,7 @@ PLUGIN_OBJS = plugin_jbd2.o
PLUGIN_OBJS += plugin_hrtimer.o
PLUGIN_OBJS += plugin_kmem.o
PLUGIN_OBJS += plugin_kvm.o
PLUGIN_OBJS += plugin_mac80211.o
PLUGINS := $(PLUGIN_OBJS:.o=.so)

95
tools/lib/traceevent/plugin_mac80211.c Normal file
View File

@ -0,0 +1,95 @@
/*
* Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "event-parse.h"
#define INDENT 65
static void print_string(struct trace_seq *s, struct event_format *event,
const char *name, const void *data)
{
struct format_field *f = pevent_find_field(event, name);
int offset;
int length;
if (!f) {
trace_seq_printf(s, "NOTFOUND:%s", name);
return;
}
offset = f->offset;
length = f->size;
if (!strncmp(f->type, "__data_loc", 10)) {
unsigned long long v;
if (pevent_read_number_field(f, data, &v)) {
trace_seq_printf(s, "invalid_data_loc");
return;
}
offset = v & 0xffff;
length = v >> 16;
}
trace_seq_printf(s, "%.*s", length, (char *)data + offset);
}
#define SF(fn) pevent_print_num_field(s, fn ":%d", event, fn, record, 0)
#define SFX(fn) pevent_print_num_field(s, fn ":%#x", event, fn, record, 0)
#define SP() trace_seq_putc(s, ' ')
static int drv_bss_info_changed(struct trace_seq *s,
struct pevent_record *record,
struct event_format *event, void *context)
{
void *data = record->data;
print_string(s, event, "wiphy_name", data);
trace_seq_printf(s, " vif:");
print_string(s, event, "vif_name", data);
pevent_print_num_field(s, "(%d)", event, "vif_type", record, 1);
trace_seq_printf(s, "\n%*s", INDENT, "");
SF("assoc"); SP();
SF("aid"); SP();
SF("cts"); SP();
SF("shortpre"); SP();
SF("shortslot"); SP();
SF("dtimper"); SP();
trace_seq_printf(s, "\n%*s", INDENT, "");
SF("bcnint"); SP();
SFX("assoc_cap"); SP();
SFX("basic_rates"); SP();
SF("enable_beacon");
trace_seq_printf(s, "\n%*s", INDENT, "");
SF("ht_operation_mode");
return 0;
}
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_event_handler(pevent, -1, "mac80211",
"drv_bss_info_changed",
drv_bss_info_changed, NULL);
return 0;
}