ltt-sessiond/trace-ust.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; only version 2
   7  * of the License.
   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_UST_H
  20 #define _LTT_TRACE_UST_H
  21
  22 #include <limits.h>
  23 #include <urcu/list.h>
  24
  25 #include <lttng/lttng.h>
  26 #include <lttng-ust.h>
  27
  28 #include "traceable-app.h"
  29
  30 /*
  31  * UST session list.
  32  */
  33 struct ltt_ust_session_list {
  34         unsigned int count;
  35         struct cds_list_head head;
  36 };
  37
  38 /* UST event list */
  39 struct ltt_ust_event_list {
  40         unsigned int count;
  41         struct cds_list_head head;
  42 };
  43
  44 /* UST Channel list */
  45 struct ltt_ust_channel_list {
  46         unsigned int count;
  47         struct cds_list_head head;
  48 };
  49
  50 /* UST event */
  51 struct ltt_ust_event {
  52         int handle;
  53         int enabled;
  54         struct lttng_ust_context *ctx;
  55         struct lttng_ust_event *event;
  56         struct cds_list_head list;
  57 };
  58
  59 /* UST channel */
  60 struct ltt_ust_channel {
  61         int handle;
  62         int enabled;
  63         char *name;
  64         char *trace_path;                   /* Trace file path name */
  65         struct lttng_ust_context *ctx;
  66         struct lttng_ust_channel *attr;
  67         struct ltt_ust_event_list events;
  68         struct cds_list_head list;
  69 };
  70
  71 /* UST Metadata */
  72 struct ltt_ust_metadata {
  73         int handle;
  74         char *trace_path;             /* Trace file path name */
  75         struct lttng_ust_channel *attr;
  76 };
  77
  78 /* UST session */
  79 struct ltt_ust_session {
  80         int handle;
  81         int enabled;
  82         int uconsumer_fds_sent;
  83         char *path;
  84         struct ltt_traceable_app *app;
  85         struct ltt_ust_metadata *metadata;
  86         struct ltt_ust_channel_list channels;
  87         struct cds_list_head list;
  88 };
  89
  90 /*
  91  * Lookup functions. NULL is returned if not found.
  92  */
  93 struct ltt_ust_event *trace_ust_get_event_by_name(
  94                 char *name, struct ltt_ust_channel *channel);
  95 struct ltt_ust_channel *trace_ust_get_channel_by_name(
  96                 char *name, struct ltt_ust_session *session);
  97 struct ltt_ust_session *trace_ust_get_session_by_pid(pid_t pid,
  98                 struct ltt_ust_session_list *session_list);
  99
 100 /*
 101  * Create functions malloc() the data structure.
 102  */
 103 struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid);
 104 struct ltt_ust_channel *trace_ust_create_channel(char *name, char *path,
 105                 struct lttng_ust_channel *attr);
 106 struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
 107 struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
 108
 109 /*
 110  * Destroy functions free() the data structure and remove from linked list if
 111  * it's applies.
 112  */
 113 void trace_ust_destroy_session(struct ltt_ust_session *session);
 114 void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
 115 void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
 116 void trace_ust_destroy_event(struct ltt_ust_event *event);
 117
 118 #endif /* _LTT_TRACE_UST_H */