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 #include "trace-seq.h"
  26
  27 #define INDENT 65
  28
  29 static void print_string(struct trace_seq *s, struct tep_event_format *event,
  30                          const char *name, const void *data)
  31 {
  32         struct tep_format_field *f = tep_find_field(event, name);
  33         int offset;
  34         int length;
  35
  36         if (!f) {
  37                 trace_seq_printf(s, "NOTFOUND:%s", name);
  38                 return;
  39         }
  40
  41         offset = f->offset;
  42         length = f->size;
  43
  44         if (!strncmp(f->type, "__data_loc", 10)) {
  45                 unsigned long long v;
  46                 if (tep_read_number_field(f, data, &v)) {
  47                         trace_seq_printf(s, "invalid_data_loc");
  48                         return;
  49                 }
  50                 offset = v & 0xffff;
  51                 length = v >> 16;
  52         }
  53
  54         trace_seq_printf(s, "%.*s", length, (char *)data + offset);
  55 }
  56
  57 #define SF(fn)  tep_print_num_field(s, fn ":%d", event, fn, record, 0)
  58 #define SFX(fn) tep_print_num_field(s, fn ":%#x", event, fn, record, 0)
  59 #define SP()    trace_seq_putc(s, ' ')
  60
  61 static int drv_bss_info_changed(struct trace_seq *s,
  62                                 struct tep_record *record,
  63                                 struct tep_event_format *event, void *context)
  64 {
  65         void *data = record->data;
  66
  67         print_string(s, event, "wiphy_name", data);
  68         trace_seq_printf(s, " vif:");
  69         print_string(s, event, "vif_name", data);
  70         tep_print_num_field(s, "(%d)", event, "vif_type", record, 1);
  71
  72         trace_seq_printf(s, "\n%*s", INDENT, "");
  73         SF("assoc"); SP();
  74         SF("aid"); SP();
  75         SF("cts"); SP();
  76         SF("shortpre"); SP();
  77         SF("shortslot"); SP();
  78         SF("dtimper"); SP();
  79         trace_seq_printf(s, "\n%*s", INDENT, "");
  80         SF("bcnint"); SP();
  81         SFX("assoc_cap"); SP();
  82         SFX("basic_rates"); SP();
  83         SF("enable_beacon");
  84         trace_seq_printf(s, "\n%*s", INDENT, "");
  85         SF("ht_operation_mode");
  86
  87         return 0;
  88 }
  89
  90 int TEP_PLUGIN_LOADER(struct tep_handle *pevent)
  91 {
  92         tep_register_event_handler(pevent, -1, "mac80211",
  93                                    "drv_bss_info_changed",
  94                                    drv_bss_info_changed, NULL);
  95         return 0;
  96 }
  97
  98 void TEP_PLUGIN_UNLOADER(struct tep_handle *pevent)
  99 {
 100         tep_unregister_event_handler(pevent, -1, "mac80211",
 101                                      "drv_bss_info_changed",
 102                                      drv_bss_info_changed, NULL);
 103 }