ltt-sessiond/trace.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #ifndef _LTT_TRACE_H
  20 #define _LTT_TRACE_H
  21
  22 #include <limits.h>
  23 #include <urcu/list.h>
  24
  25 #include <lttng/lttng.h>
  26
  27 #include "lttng-kernel.h"
  28
  29 /* Kernel event list */
  30 struct ltt_kernel_event_list {
  31         struct cds_list_head head;
  32 };
  33
  34 /* Channel stream list */
  35 struct ltt_kernel_stream_list {
  36         struct cds_list_head head;
  37 };
  38
  39 /* Channel list */
  40 struct ltt_kernel_channel_list {
  41         struct cds_list_head head;
  42 };
  43
  44 /* Kernel event */
  45 struct ltt_kernel_event {
  46         int fd;
  47         struct lttng_kernel_event *event;
  48         struct cds_list_head list;
  49 };
  50
  51 /* Kernel channel */
  52 struct ltt_kernel_channel {
  53         int fd;
  54         char *pathname;
  55         unsigned int stream_count;
  56         struct lttng_channel *channel;
  57         struct ltt_kernel_event_list events_list;
  58         struct ltt_kernel_stream_list stream_list;
  59         struct cds_list_head list;
  60 };
  61
  62 /* Metadata */
  63 struct ltt_kernel_metadata {
  64         int fd;
  65         char *pathname;
  66         struct lttng_channel *conf;
  67 };
  68
  69 /* Channel stream */
  70 struct ltt_kernel_stream {
  71         int fd;
  72         char *pathname;
  73         int state;
  74         struct cds_list_head list;
  75 };
  76
  77 /* Kernel session */
  78 struct ltt_kernel_session {
  79         int fd;
  80         int metadata_stream_fd;
  81         int kconsumer_fds_sent;
  82         unsigned int channel_count;
  83         unsigned int stream_count_global;
  84         struct ltt_kernel_metadata *metadata;
  85         struct ltt_kernel_channel_list channel_list;
  86 };
  87
  88 /* UST trace representation */
  89 struct ltt_ust_trace {
  90         struct cds_list_head list;
  91         char name[NAME_MAX];
  92         int shmid;
  93         pid_t pid;
  94         struct cds_list_head markers;
  95 };
  96
  97 struct ltt_ust_marker {
  98         struct cds_list_head list;
  99         char *name;
 100         char *channel;
 101 };
 102
 103 /*
 104  * Create functions malloc() the data structure.
 105  */
 106 struct ltt_kernel_session *trace_create_kernel_session(void);
 107 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan);
 108 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
 109 struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
 110 struct ltt_kernel_stream *trace_create_kernel_stream(void);
 111
 112 /*
 113  * Destroy functions free() the data structure and remove from linked list if
 114  * it's applies.
 115  */
 116 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
 117 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
 118 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
 119 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
 120 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
 121
 122 #endif /* _LTT_TRACE_H */