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 /* Kernel event */
  32 struct ltt_kernel_event {
  33         int fd;
  34         struct lttng_kernel_event *event;
  35         struct cds_list_head list;
  36 };
  37
  38 /* Kernel channel */
  39 struct ltt_kernel_channel {
  40         int fd;
  41         struct lttng_kernel_channel *channel;
  42         struct ltt_kernel_event_list events_list;
  43 };
  44
  45 /* Metadata */
  46 struct ltt_kernel_metadata {
  47         int fd;
  48         struct lttng_kernel_channel *conf;
  49 };
  50
  51 /* Kernel session */
  52 struct ltt_kernel_session {
  53         int fd;
  54         struct ltt_kernel_metadata *metadata;
  55         struct ltt_kernel_channel *channel;
  56 };
  57
  58 /* UST trace representation */
  59 struct ltt_ust_trace {
  60         struct cds_list_head list;
  61         char name[NAME_MAX];
  62         int shmid;
  63         pid_t pid;
  64         struct cds_list_head markers;
  65 };
  66
  67 struct ltt_ust_marker {
  68         struct cds_list_head list;
  69         char *name;
  70         char *channel;
  71 };
  72
  73 int get_trace_count_per_session(struct ltt_session *session);
  74 void get_traces_per_session(struct ltt_session *session, struct lttng_trace *traces);
  75 int ust_create_trace(struct command_ctx *cmd_ctx);
  76 int ust_start_trace(struct command_ctx *cmd_ctx);
  77 int ust_stop_trace(struct command_ctx *cmd_ctx);
  78
  79 #endif /* _LTT_TRACE_H */