LXR linux/tools/lib/traceevent/plugin

   1/*
   2 * Copyright (C) 2009 Johannes Berg <johannes@sipsolutions.net>
   3 *
   4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU Lesser General Public
   7 * License as published by the Free Software Foundation;
   8 * version 2.1 of the License (not later!)
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU Lesser General Public License for more details.
  14 *
  15 * You should have received a copy of the GNU Lesser General Public
  16 * License along with this program; if not,  see <http://www.gnu.org/licenses>
  17 *
  18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19 */
  20#include <stdio.h>
  21#include <stdlib.h>
  22#include <string.h>
  23
  24#include "event-parse.h"
  25
  26#define INDENT 65
  27
  28static void print_string(struct trace_seq *s, struct event_format *event,
  29                         const char *name, const void *data)
  30{
  31        struct format_field *f = pevent_find_field(event, name);
  32        int offset;
  33        int length;
  34
  35        if (!f) {
  36                trace_seq_printf(s, "NOTFOUND:%s", name);
  37                return;
  38        }
  39
  40        offset = f->offset;
  41        length = f->size;
  42
  43        if (!strncmp(f->type, "__data_loc", 10)) {
  44                unsigned long long v;
  45                if (pevent_read_number_field(f, data, &v)) {
  46                        trace_seq_printf(s, "invalid_data_loc");
  47                        return;
  48                }
  49                offset = v & 0xffff;
  50                length = v >> 16;
  51        }
  52
  53        trace_seq_printf(s, "%.*s", length, (char *)data + offset);
  54}
  55
  56#define SF(fn)  pevent_print_num_field(s, fn ":%d", event, fn, record, 0)
  57#define SFX(fn) pevent_print_num_field(s, fn ":%#x", event, fn, record, 0)
  58#define SP()    trace_seq_putc(s, ' ')
  59
  60static int drv_bss_info_changed(struct trace_seq *s,
  61                                struct pevent_record *record,
  62                                struct event_format *event, void *context)
  63{
  64        void *data = record->data;
  65
  66        print_string(s, event, "wiphy_name", data);
  67        trace_seq_printf(s, " vif:");
  68        print_string(s, event, "vif_name", data);
  69        pevent_print_num_field(s, "(%d)", event, "vif_type", record, 1);
  70
  71        trace_seq_printf(s, "\n%*s", INDENT, "");
  72        SF("assoc"); SP();
  73        SF("aid"); SP();
  74        SF("cts"); SP();
  75        SF("shortpre"); SP();
  76        SF("shortslot"); SP();
  77        SF("dtimper"); SP();
  78        trace_seq_printf(s, "\n%*s", INDENT, "");
  79        SF("bcnint"); SP();
  80        SFX("assoc_cap"); SP();
  81        SFX("basic_rates"); SP();
  82        SF("enable_beacon");
  83        trace_seq_printf(s, "\n%*s", INDENT, "");
  84        SF("ht_operation_mode");
  85
  86        return 0;
  87}
  88
  89int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
  90{
  91        pevent_register_event_handler(pevent, -1, "mac80211",
  92                                      "drv_bss_info_changed",
  93                                      drv_bss_info_changed, NULL);
  94        return 0;
  95}
  96
  97void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
  98{
  99        pevent_unregister_event_handler(pevent, -1, "mac80211",
 100                                        "drv_bss_info_changed",
 101                                        drv_bss_info_changed, NULL);
 102}
 103