source3/winbindd/winbindd_traceid.c

   1 /*
   2     Authors:
   3         Pavel Březina <pbrezina@redhat.com>
   4
   5     Copyright (C) 2021 Red Hat
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 3 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "lib/util/debug.h"
  22 #include "winbindd_traceid.h"
  23 #include "tevent.h"
  24
  25 static void debug_traceid_trace_fde(struct tevent_fd *fde,
  26                                    enum tevent_event_trace_point point,
  27                                    void *private_data)
  28 {
  29     switch (point) {
  30     case TEVENT_EVENT_TRACE_ATTACH:
  31         /* Assign the current traceid id when the event is created. */
  32         tevent_fd_set_tag(fde, debug_traceid_get());
  33         break;
  34     case TEVENT_EVENT_TRACE_BEFORE_HANDLER:
  35         /* Set the traceid id when a handler is being called. */
  36         debug_traceid_set(tevent_fd_get_tag(fde));
  37         break;
  38     default:
  39         /* Do nothing. */
  40         break;
  41     }
  42 }
  43
  44 static void debug_traceid_trace_signal(struct tevent_signal *se,
  45                                       enum tevent_event_trace_point point,
  46                                       void *private_data)
  47 {
  48     switch (point) {
  49     case TEVENT_EVENT_TRACE_ATTACH:
  50         /* Assign the current traceid id when the event is created. */
  51         tevent_signal_set_tag(se, debug_traceid_get());
  52         break;
  53     case TEVENT_EVENT_TRACE_BEFORE_HANDLER:
  54         /* Set the traceid id when a handler is being called. */
  55         debug_traceid_set(tevent_signal_get_tag(se));
  56         break;
  57     default:
  58         /* Do nothing. */
  59         break;
  60     }
  61 }
  62
  63 static void debug_traceid_trace_timer(struct tevent_timer *timer,
  64                                      enum tevent_event_trace_point point,
  65                                      void *private_data)
  66 {
  67     switch (point) {
  68     case TEVENT_EVENT_TRACE_ATTACH:
  69         /* Assign the current traceid id when the event is created. */
  70         tevent_timer_set_tag(timer, debug_traceid_get());
  71         break;
  72     case TEVENT_EVENT_TRACE_BEFORE_HANDLER:
  73         /* Set the traceid id when a handler is being called. */
  74         debug_traceid_set(tevent_timer_get_tag(timer));
  75         break;
  76     default:
  77         /* Do nothing. */
  78         break;
  79     }
  80 }
  81
  82 static void debug_traceid_trace_immediate(struct tevent_immediate *im,
  83                                          enum tevent_event_trace_point point,
  84                                          void *private_data)
  85 {
  86     switch (point) {
  87     case TEVENT_EVENT_TRACE_ATTACH:
  88         /* Assign the current traceid id when the event is created. */
  89         tevent_immediate_set_tag(im, debug_traceid_get());
  90         break;
  91     case TEVENT_EVENT_TRACE_BEFORE_HANDLER:
  92         /* Set the traceid id when a handler is being called. */
  93         debug_traceid_set(tevent_immediate_get_tag(im));
  94         break;
  95     default:
  96         /* Do nothing. */
  97         break;
  98     }
  99 }
 100
 101 static void debug_traceid_trace_queue(struct tevent_queue_entry *qe,
 102                                          enum tevent_event_trace_point point,
 103                                          void *private_data)
 104 {
 105     switch (point) {
 106     case TEVENT_EVENT_TRACE_ATTACH:
 107         /* Assign the current traceid id when the event is created. */
 108         tevent_queue_entry_set_tag(qe, debug_traceid_get());
 109         break;
 110     case TEVENT_EVENT_TRACE_BEFORE_HANDLER:
 111         /* Set the traceid id when a handler is being called. */
 112         debug_traceid_set(tevent_queue_entry_get_tag(qe));
 113         break;
 114     default:
 115         /* Do nothing. */
 116         break;
 117     }
 118 }
 119
 120 static void debug_traceid_trace_loop(enum tevent_trace_point point,
 121                                     void *private_data)
 122 {
 123     switch (point) {
 124     case TEVENT_TRACE_AFTER_LOOP_ONCE:
 125         /* Reset traceid id when we got back to the loop. An event handler
 126          * that set traceid id was fired. This tracepoint represents a place
 127          * after the event handler was finished, we need to restore traceid
 128          * id to 1 (out of request). 0 means not initialized.
 129          */
 130         debug_traceid_set(1);
 131         break;
 132     default:
 133         /* Do nothing. */
 134         break;
 135     }
 136 }
 137
 138 void winbind_debug_traceid_setup(struct tevent_context *ev)
 139 {
 140     tevent_set_trace_callback(ev, debug_traceid_trace_loop, NULL);
 141     tevent_set_trace_fd_callback(ev, debug_traceid_trace_fde, NULL);
 142     tevent_set_trace_signal_callback(ev, debug_traceid_trace_signal, NULL);
 143     tevent_set_trace_timer_callback(ev, debug_traceid_trace_timer, NULL);
 144     tevent_set_trace_immediate_callback(ev, debug_traceid_trace_immediate, NULL);
 145     tevent_set_trace_queue_callback(ev, debug_traceid_trace_queue, NULL);
 146     debug_traceid_set(1);
 147 }