LXR linux/tools/lib/traceevent/plugins/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#include "trace-seq.h"
  26
  27#define INDENT 65
  28
  29static void print_string(struct trace_seq *s, struct tep_event *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
  61static int drv_bss_info_changed(struct trace_seq *s,
  62                                struct tep_record *record,
  63                                struct tep_event *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
  90int TEP_PLUGIN_LOADER(struct tep_handle *tep)
  91{
  92        tep_register_event_handler(tep, -1, "mac80211",
  93                                   "drv_bss_info_changed",
  94                                   drv_bss_info_changed, NULL);
  95        return 0;
  96}
  97
  98void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
  99{
 100        tep_unregister_event_handler(tep, -1, "mac80211",
 101                                     "drv_bss_info_changed",
 102                                     drv_bss_info_changed, NULL);
 103}
 104