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
  28 #include "session.h"
  29 #include "ust-app.h"
  30
  31 struct module_param {
  32         const char *name;
  33         int required;
  34 };
  35
  36 /* LTTng kernel tracer modules list */
  37 const struct module_param kernel_modules_list[] = {
  38         { "lttng-ftrace", 0 },
  39         { "lttng-kprobes", 0 },
  40         { "lttng-kretprobes", 0 },
  41         { "lib-ring-buffer", 1 },
  42         { "ltt-relay", 1 },
  43         { "ltt-ring-buffer-client-discard", 1 },
  44         { "ltt-ring-buffer-client-overwrite", 1 },
  45         { "ltt-ring-buffer-metadata-client", 1 },
  46         { "ltt-ring-buffer-client-mmap-discard", 1 },
  47         { "ltt-ring-buffer-client-mmap-overwrite", 1 },
  48         { "ltt-ring-buffer-metadata-mmap-client", 1 },
  49         { "lttng-probe-lttng", 1 },
  50         { "lttng-types", 0 },
  51         { "lttng-probe-block", 0 },
  52         { "lttng-probe-irq", 0 },
  53         { "lttng-probe-kvm", 0 },
  54         { "lttng-probe-sched", 0 },
  55 };
  56
  57 extern const char default_home_dir[],
  58         default_tracing_group[],
  59         default_ust_sock_dir[],
  60         default_global_apps_pipe[];
  61
  62 /*
  63  * This contains extra data needed for processing a command received by the
  64  * session daemon from the lttng client.
  65  */
  66 struct command_ctx {
  67         int ust_sock;
  68         unsigned int lttng_msg_size;
  69         struct ucred creds;
  70         struct ltt_session *session;
  71         struct lttcomm_lttng_msg *llm;
  72         struct lttcomm_session_msg *lsm;
  73 };
  74
  75 struct ust_command {
  76         int sock;
  77         struct ust_register_msg reg_msg;
  78         struct cds_wfq_node node;
  79 };
  80
  81 /*
  82  * Queue used to enqueue UST registration request (ust_commant) and protected
  83  * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h
  84  */
  85 struct ust_cmd_queue {
  86         int32_t futex;
  87         struct cds_wfq_queue queue;
  88 };
  89
  90 #endif /* _LTT_SESSIOND_H */