ec7c6debdd
The event handler should be unregistered when the plugin is unloaded otherwise it'll try to access invalid memory. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1389839478-5887-9-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
|
|
{
|
|
pevent_unregister_event_handler(pevent, -1, "mac80211",
|
|
"drv_bss_info_changed",
|
|
drv_bss_info_changed, NULL);
|
|
}
|