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