kernel/tools/lib/traceevent/plugin_mac80211.c

   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
  28 static 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
  60 static 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
  89 int 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
  97 void 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 }