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         int enabled;
  48         struct lttng_kernel_event *event;
  49         struct cds_list_head list;
  50 };
  51
  52 /* Kernel channel */
  53 struct ltt_kernel_channel {
  54         int fd;
  55         char *pathname;
  56         unsigned int stream_count;
  57         struct lttng_channel *channel;
  58         struct ltt_kernel_event_list events_list;
  59         struct ltt_kernel_stream_list stream_list;
  60         struct cds_list_head list;
  61 };
  62
  63 /* Metadata */
  64 struct ltt_kernel_metadata {
  65         int fd;
  66         char *pathname;
  67         struct lttng_channel *conf;
  68 };
  69
  70 /* Channel stream */
  71 struct ltt_kernel_stream {
  72         int fd;
  73         char *pathname;
  74         int state;
  75         struct cds_list_head list;
  76 };
  77
  78 /* Kernel session */
  79 struct ltt_kernel_session {
  80         int fd;
  81         int metadata_stream_fd;
  82         int kconsumer_fds_sent;
  83         unsigned int channel_count;
  84         unsigned int stream_count_global;
  85         struct ltt_kernel_metadata *metadata;
  86         struct ltt_kernel_channel_list channel_list;
  87 };
  88
  89 /* UST trace representation */
  90 struct ltt_ust_trace {
  91         struct cds_list_head list;
  92         char name[NAME_MAX];
  93         int shmid;
  94         pid_t pid;
  95         struct cds_list_head markers;
  96 };
  97
  98 struct ltt_ust_marker {
  99         struct cds_list_head list;
 100         char *name;
 101         char *channel;
 102 };
 103
 104 /*
 105  * Get functions.
 106  */
 107 struct ltt_kernel_event *get_kernel_event_by_name(
 108                 char *name, struct ltt_kernel_channel *channel);
 109 struct ltt_kernel_channel *get_kernel_channel_by_name(
 110                 char *name, struct ltt_kernel_session *session);
 111
 112 /*
 113  * Create functions malloc() the data structure.
 114  */
 115 struct ltt_kernel_session *trace_create_kernel_session(void);
 116 struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan);
 117 struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev);
 118 struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
 119 struct ltt_kernel_stream *trace_create_kernel_stream(void);
 120
 121 /*
 122  * Destroy functions free() the data structure and remove from linked list if
 123  * it's applies.
 124  */
 125 void trace_destroy_kernel_session(struct ltt_kernel_session *session);
 126 void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata);
 127 void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel);
 128 void trace_destroy_kernel_event(struct ltt_kernel_event *event);
 129 void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream);
 130
 131 #endif /* _LTT_TRACE_H */