src/bin/lttng-sessiond/lttng-sessiond.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_SESSIOND_H
  20 #define _LTT_SESSIOND_H
  21
  22 #define _LGPL_SOURCE
  23 #include <urcu.h>
  24 #include <urcu/wfqueue.h>
  25
  26 #include <common/sessiond-comm/sessiond-comm.h>
  27 #include <common/compat/socket.h>
  28
  29 #include "session.h"
  30 #include "ust-app.h"
  31
  32 const char *module_proc_lttng = "/proc/lttng";
  33
  34 extern const char default_home_dir[],
  35         default_tracing_group[],
  36         default_ust_sock_dir[],
  37         default_global_apps_pipe[];
  38
  39 /*
  40  * This contains extra data needed for processing a command received by the
  41  * session daemon from the lttng client.
  42  */
  43 struct command_ctx {
  44         int ust_sock;
  45         unsigned int lttng_msg_size;
  46         struct ltt_session *session;
  47         struct lttcomm_lttng_msg *llm;
  48         struct lttcomm_session_msg *lsm;
  49         lttng_sock_cred creds;
  50 };
  51
  52 struct ust_command {
  53         int sock;
  54         struct ust_register_msg reg_msg;
  55         struct cds_wfq_node node;
  56 };
  57
  58 /*
  59  * Queue used to enqueue UST registration request (ust_commant) and protected
  60  * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
  61  */
  62 struct ust_cmd_queue {
  63         int32_t futex;
  64         struct cds_wfq_queue queue;
  65 };
  66
  67 #endif /* _LTT_SESSIOND_H */