src/bin/lttng-sessiond/notification-thread-commands.h

   1 /*
   2  * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License, version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #ifndef NOTIFICATION_THREAD_COMMANDS_H
  19 #define NOTIFICATION_THREAD_COMMANDS_H
  20
  21 #include <lttng/domain.h>
  22 #include <lttng/lttng-error.h>
  23 #include <urcu/rculfhash.h>
  24 #include "notification-thread.h"
  25 #include "notification-thread-internal.h"
  26 #include "notification-thread-events.h"
  27 #include <common/waiter.h>
  28
  29 struct notification_thread_data;
  30 struct lttng_trigger;
  31
  32 enum notification_thread_command_type {
  33         NOTIFICATION_COMMAND_TYPE_REGISTER_TRIGGER,
  34         NOTIFICATION_COMMAND_TYPE_UNREGISTER_TRIGGER,
  35         NOTIFICATION_COMMAND_TYPE_ADD_CHANNEL,
  36         NOTIFICATION_COMMAND_TYPE_REMOVE_CHANNEL,
  37         NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_ONGOING,
  38         NOTIFICATION_COMMAND_TYPE_SESSION_ROTATION_COMPLETED,
  39         NOTIFICATION_COMMAND_TYPE_QUIT,
  40 };
  41
  42 struct notification_thread_command {
  43         struct cds_list_head cmd_list_node;
  44
  45         enum notification_thread_command_type type;
  46         union {
  47                 /* Register/Unregister trigger. */
  48                 struct lttng_trigger *trigger;
  49                 /* Add channel. */
  50                 struct {
  51                         struct {
  52                                 const char *name;
  53                                 uid_t uid;
  54                                 gid_t gid;
  55                         } session;
  56                         struct {
  57                                 const char *name;
  58                                 enum lttng_domain_type domain;
  59                                 uint64_t key;
  60                                 uint64_t capacity;
  61                         } channel;
  62                 } add_channel;
  63                 /* Remove channel. */
  64                 struct {
  65                         uint64_t key;
  66                         enum lttng_domain_type domain;
  67                 } remove_channel;
  68                 struct {
  69                         const char *session_name;
  70                         uid_t uid;
  71                         gid_t gid;
  72                         uint64_t trace_archive_chunk_id;
  73                         struct lttng_trace_archive_location *location;
  74                 } session_rotation;
  75         } parameters;
  76
  77         /* lttng_waiter on which to wait for command reply (optional). */
  78         struct lttng_waiter reply_waiter;
  79         enum lttng_error_code reply_code;
  80 };
  81
  82 enum lttng_error_code notification_thread_command_register_trigger(
  83                 struct notification_thread_handle *handle,
  84                 struct lttng_trigger *trigger);
  85
  86 enum lttng_error_code notification_thread_command_unregister_trigger(
  87                 struct notification_thread_handle *handle,
  88                 struct lttng_trigger *trigger);
  89
  90 enum lttng_error_code notification_thread_command_add_channel(
  91                 struct notification_thread_handle *handle,
  92                 char *session_name, uid_t session_uid, gid_t session_gid,
  93                 char *channel_name, uint64_t key,
  94                 enum lttng_domain_type domain, uint64_t capacity);
  95
  96 enum lttng_error_code notification_thread_command_remove_channel(
  97                 struct notification_thread_handle *handle,
  98                 uint64_t key, enum lttng_domain_type domain);
  99
 100 enum lttng_error_code notification_thread_command_session_rotation_ongoing(
 101                 struct notification_thread_handle *handle,
 102                 const char *session_name, uid_t session_uid, gid_t session_gid,
 103                 uint64_t trace_archive_chunk_id);
 104
 105 /* Ownership of location is transferred. */
 106 enum lttng_error_code notification_thread_command_session_rotation_completed(
 107                 struct notification_thread_handle *handle,
 108                 const char *session_name, uid_t session_uid, gid_t session_gid,
 109                 uint64_t trace_archive_chunk_id,
 110                 struct lttng_trace_archive_location *location);
 111
 112 void notification_thread_command_quit(
 113                 struct notification_thread_handle *handle);
 114
 115 #endif /* NOTIFICATION_THREAD_COMMANDS_H */