Commit | Line | Data |
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8c0faa1d DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
88564da0 | 3 | * Copyright (C) 2013 - Raphaël Beamonte <raphael.beamonte@gmail.com> |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8c0faa1d | 8 | * |
fac6795d DG |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
d14d33bf | 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
fac6795d | 12 | * GNU General Public License for more details. |
8c0faa1d | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #ifndef _LTT_SESSIOND_H | |
20 | #define _LTT_SESSIOND_H | |
21 | ||
f6a9efaa | 22 | #include <urcu.h> |
8bdee6e2 | 23 | #include <urcu/wfcqueue.h> |
099e26bd | 24 | |
10a8a223 | 25 | #include <common/sessiond-comm/sessiond-comm.h> |
d0b96690 | 26 | #include <common/compat/poll.h> |
730389d9 | 27 | #include <common/compat/socket.h> |
10a8a223 DG |
28 | |
29 | #include "session.h" | |
56fff090 | 30 | #include "ust-app.h" |
e9404c27 | 31 | #include "notification-thread.h" |
e6142f2e | 32 | #include "sessiond-config.h" |
099e26bd | 33 | |
686204ab MD |
34 | extern const char default_home_dir[], |
35 | default_tracing_group[], | |
36 | default_ust_sock_dir[], | |
37 | default_global_apps_pipe[]; | |
fac6795d | 38 | |
2f77fc4b DG |
39 | /* Set in main.c at boot time of the daemon */ |
40 | extern int kernel_tracer_fd; | |
41 | ||
a7333da7 | 42 | /* Notification thread handle. */ |
e9404c27 JG |
43 | extern struct notification_thread_handle *notification_thread_handle; |
44 | ||
5461b305 DG |
45 | /* |
46 | * This contains extra data needed for processing a command received by the | |
47 | * session daemon from the lttng client. | |
48 | */ | |
49 | struct command_ctx { | |
50 | int ust_sock; | |
51 | unsigned int lttng_msg_size; | |
52 | struct ltt_session *session; | |
53 | struct lttcomm_lttng_msg *llm; | |
54 | struct lttcomm_session_msg *lsm; | |
730389d9 | 55 | lttng_sock_cred creds; |
5461b305 DG |
56 | }; |
57 | ||
099e26bd DG |
58 | struct ust_command { |
59 | int sock; | |
60 | struct ust_register_msg reg_msg; | |
8bdee6e2 | 61 | struct cds_wfcq_node node; |
099e26bd DG |
62 | }; |
63 | ||
64 | /* | |
7a44d6f1 | 65 | * Queue used to enqueue UST registration request (ust_command) and synchronized |
099e26bd DG |
66 | * by a futex with a scheme N wakers / 1 waiters. See futex.c/.h |
67 | */ | |
68 | struct ust_cmd_queue { | |
69 | int32_t futex; | |
8bdee6e2 SM |
70 | struct cds_wfcq_head head; |
71 | struct cds_wfcq_tail tail; | |
099e26bd DG |
72 | }; |
73 | ||
f45e313d DG |
74 | /* |
75 | * This is the wait queue containing wait nodes during the application | |
76 | * registration process. | |
77 | */ | |
78 | struct ust_reg_wait_queue { | |
79 | unsigned long count; | |
80 | struct cds_list_head head; | |
81 | }; | |
82 | ||
83 | /* | |
84 | * Use by the dispatch registration to queue UST command socket to wait for the | |
85 | * notify socket. | |
86 | */ | |
87 | struct ust_reg_wait_node { | |
88 | struct ust_app *app; | |
89 | struct cds_list_head head; | |
90 | }; | |
91 | ||
d0b96690 DG |
92 | /* |
93 | * This pipe is used to inform the thread managing application notify | |
94 | * communication that a command is queued and ready to be processed. | |
95 | */ | |
96 | extern int apps_cmd_notify_pipe[2]; | |
97 | ||
0b2dc8df MD |
98 | /* |
99 | * Used to notify that a hash table needs to be destroyed by dedicated | |
100 | * thread. Required by design because we don't want to move destroy | |
101 | * paths outside of large RCU read-side lock paths, and destroy cannot | |
102 | * be called by call_rcu thread, because it may hang (waiting for | |
103 | * call_rcu completion). | |
104 | */ | |
105 | extern int ht_cleanup_pipe[2]; | |
106 | ||
12744796 DG |
107 | /* |
108 | * Populated when the daemon starts with the current page size of the system. | |
a7333da7 | 109 | * Set in main() with the current page size. |
12744796 DG |
110 | */ |
111 | extern long page_size; | |
112 | ||
5e97de00 JG |
113 | /* Application health monitoring */ |
114 | extern struct health_app *health_sessiond; | |
115 | ||
a7333da7 | 116 | extern struct sessiond_config config; |
26296c48 | 117 | |
a7333da7 | 118 | extern int lttng_sessiond_ready; |
f43f95a9 | 119 | |
a7333da7 JG |
120 | extern int ust_consumerd64_fd, ust_consumerd32_fd; |
121 | ||
122 | /* Parent PID for --sig-parent option */ | |
123 | extern pid_t ppid; | |
124 | /* Internal parent PID use with daemonize. */ | |
125 | extern pid_t child_ppid; | |
e9404c27 | 126 | |
a7333da7 | 127 | int sessiond_init_thread_quit_pipe(void); |
d0b96690 | 128 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events); |
a7333da7 JG |
129 | int sessiond_wait_for_quit_pipe(unsigned int timeout_us); |
130 | int sessiond_notify_quit_pipe(void); | |
131 | void sessiond_close_quit_pipe(void); | |
132 | ||
5e97de00 | 133 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size); |
ef367a93 | 134 | void sessiond_notify_ready(void); |
9cc1ba3b | 135 | void sessiond_signal_parents(void); |
ef367a93 | 136 | |
fac6795d | 137 | #endif /* _LTT_SESSIOND_H */ |