55df5ed9f4561c69a62bcdbe693d94b538bbfe8b
[lttng-tools.git] / src / common / sessiond-comm / agent.h
1 /*
2 * Copyright (C) 2013 - David Goulet <dgoulet@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 AGENT_COMM
19 #define AGENT_COMM
20
21 #define _GNU_SOURCE
22 #include <stdint.h>
23
24 #include <lttng/lttng.h>
25
26 /*
27 * Command value passed in the header.
28 */
29 enum lttcomm_agent_command {
30 AGENT_CMD_LIST = 1,
31 AGENT_CMD_ENABLE = 2,
32 AGENT_CMD_DISABLE = 3,
33 AGENT_CMD_REG_DONE = 4, /* End registration process. */
34 };
35
36 /*
37 * Return codes from the agent.
38 */
39 enum lttcomm_agent_ret_code {
40 AGENT_RET_CODE_SUCCESS = 1,
41 AGENT_RET_CODE_INVALID = 2,
42 AGENT_RET_CODE_UNKNOWN_NAME = 3,
43 AGENT_RET_CODE_NR,
44 };
45
46 /*
47 * Agent application communication header.
48 */
49 struct lttcomm_agent_hdr {
50 uint64_t data_size; /* data size following this header */
51 uint32_t cmd; /* Enum of agent command. */
52 uint32_t cmd_version; /* command version */
53 } LTTNG_PACKED;
54
55 /*
56 * Enable event command payload.
57 */
58 struct lttcomm_agent_enable {
59 uint32_t loglevel;
60 uint32_t loglevel_type;
61 char name[LTTNG_SYMBOL_NAME_LEN];
62 } LTTNG_PACKED;
63
64 /*
65 * Disable event command payload.
66 */
67 struct lttcomm_agent_disable {
68 char name[LTTNG_SYMBOL_NAME_LEN];
69 } LTTNG_PACKED;
70
71 /*
72 * Generic reply coming from the agent.
73 */
74 struct lttcomm_agent_generic_reply {
75 uint32_t ret_code;
76 } LTTNG_PACKED;
77
78 /*
79 * List command reply header.
80 */
81 struct lttcomm_agent_list_reply_hdr {
82 uint32_t ret_code;
83 uint32_t data_size;
84 } LTTNG_PACKED;
85
86 /*
87 * List command reply payload coming from the agent.
88 */
89 struct lttcomm_agent_list_reply {
90 uint32_t nb_event;
91 /* List of event name each of them ending by a NULL byte. */
92 char payload[];
93 } LTTNG_PACKED;
94
95 #endif /* AGENT_COMM */
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