tools/lib/traceevent/plugins/plugin_mac80211.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 /*
   3  * Copyright (C) 2009 Johannes Berg <[email protected]>
   4  */
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8
   9 #include "event-parse.h"
  10 #include "trace-seq.h"
  11
  12 #define INDENT 65
  13
  14 static void print_string(struct trace_seq *s, struct tep_event *event,
  15                          const char *name, const void *data)
  16 {
  17         struct tep_format_field *f = tep_find_field(event, name);
  18         int offset;
  19         int length;
  20
  21         if (!f) {
  22                 trace_seq_printf(s, "NOTFOUND:%s", name);
  23                 return;
  24         }
  25
  26         offset = f->offset;
  27         length = f->size;
  28
  29         if (!strncmp(f->type, "__data_loc", 10)) {
  30                 unsigned long long v;
  31                 if (tep_read_number_field(f, data, &v)) {
  32                         trace_seq_printf(s, "invalid_data_loc");
  33                         return;
  34                 }
  35                 offset = v & 0xffff;
  36                 length = v >> 16;
  37         }
  38
  39         trace_seq_printf(s, "%.*s", length, (char *)data + offset);
  40 }
  41
  42 #define SF(fn)  tep_print_num_field(s, fn ":%d", event, fn, record, 0)
  43 #define SFX(fn) tep_print_num_field(s, fn ":%#x", event, fn, record, 0)
  44 #define SP()    trace_seq_putc(s, ' ')
  45
  46 static int drv_bss_info_changed(struct trace_seq *s,
  47                                 struct tep_record *record,
  48                                 struct tep_event *event, void *context)
  49 {
  50         void *data = record->data;
  51
  52         print_string(s, event, "wiphy_name", data);
  53         trace_seq_printf(s, " vif:");
  54         print_string(s, event, "vif_name", data);
  55         tep_print_num_field(s, "(%d)", event, "vif_type", record, 1);
  56
  57         trace_seq_printf(s, "\n%*s", INDENT, "");
  58         SF("assoc"); SP();
  59         SF("aid"); SP();
  60         SF("cts"); SP();
  61         SF("shortpre"); SP();
  62         SF("shortslot"); SP();
  63         SF("dtimper"); SP();
  64         trace_seq_printf(s, "\n%*s", INDENT, "");
  65         SF("bcnint"); SP();
  66         SFX("assoc_cap"); SP();
  67         SFX("basic_rates"); SP();
  68         SF("enable_beacon");
  69         trace_seq_printf(s, "\n%*s", INDENT, "");
  70         SF("ht_operation_mode");
  71
  72         return 0;
  73 }
  74
  75 int TEP_PLUGIN_LOADER(struct tep_handle *tep)
  76 {
  77         tep_register_event_handler(tep, -1, "mac80211",
  78                                    "drv_bss_info_changed",
  79                                    drv_bss_info_changed, NULL);
  80         return 0;
  81 }
  82
  83 void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
  84 {
  85         tep_unregister_event_handler(tep, -1, "mac80211",
  86                                      "drv_bss_info_changed",
  87                                      drv_bss_info_changed, NULL);
  88 }