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 "ltt-sessiond.h"
  23 #include "session.h"
  24 #include "lttng-kernel.h"
  25
  26 /* Kernel event list */
  27 struct ltt_kernel_event_list {
  28         struct cds_list_head head;
  29 };
  30
  31 /* Channel stream list */
  32 struct ltt_kernel_stream_list {
  33         struct cds_list_head head;
  34 };
  35
  36 /* Channel list */
  37 struct ltt_kernel_channel_list {
  38         struct cds_list_head head;
  39 };
  40
  41 /* Kernel event */
  42 struct ltt_kernel_event {
  43         int fd;
  44         struct lttng_kernel_event *event;
  45         struct cds_list_head list;
  46 };
  47
  48 /* Kernel channel */
  49 struct ltt_kernel_channel {
  50         int fd;
  51         char *pathname;
  52         unsigned int stream_count;
  53         struct lttng_kernel_channel *channel;
  54         struct ltt_kernel_event_list events_list;
  55         struct ltt_kernel_stream_list stream_list;
  56         struct cds_list_head list;
  57 };
  58
  59 /* Metadata */
  60 struct ltt_kernel_metadata {
  61         int fd;
  62         char *pathname;
  63         struct lttng_kernel_channel *conf;
  64 };
  65
  66 /* Channel stream */
  67 struct ltt_kernel_stream {
  68         int fd;
  69         char *pathname;
  70         int state;
  71         struct cds_list_head list;
  72 };
  73
  74 /* Kernel session */
  75 struct ltt_kernel_session {
  76         int fd;
  77         int metadata_stream_fd;
  78         unsigned int channel_count;
  79         unsigned int stream_count_global;
  80         struct ltt_kernel_metadata *metadata;
  81         struct ltt_kernel_channel_list channel_list;
  82 };
  83
  84 /* UST trace representation */
  85 struct ltt_ust_trace {
  86         struct cds_list_head list;
  87         char name[NAME_MAX];
  88         int shmid;
  89         pid_t pid;
  90         struct cds_list_head markers;
  91 };
  92
  93 struct ltt_ust_marker {
  94         struct cds_list_head list;
  95         char *name;
  96         char *channel;
  97 };
  98
  99 int get_trace_count_per_session(struct ltt_session *session);
 100 void get_traces_per_session(struct ltt_session *session, struct lttng_trace *traces);
 101 int ust_create_trace(struct command_ctx *cmd_ctx);
 102 int ust_start_trace(struct command_ctx *cmd_ctx);
 103 int ust_stop_trace(struct command_ctx *cmd_ctx);
 104
 105 #endif /* _LTT_TRACE_H */