Add the filter expression to the enable_event agent protocol message
[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 #include <stdint.h>
22
23 #include <lttng/lttng.h>
24
25 /*
26 * Command value passed in the header.
27 */
28 enum lttcomm_agent_command {
29 AGENT_CMD_LIST = 1,
30 AGENT_CMD_ENABLE = 2,
31 AGENT_CMD_DISABLE = 3,
32 AGENT_CMD_REG_DONE = 4, /* End registration process. */
33 };
34
35 /*
36 * Return codes from the agent.
37 */
38 enum lttcomm_agent_ret_code {
39 /* Success, assumed to be the first entry */
40 AGENT_RET_CODE_SUCCESS = 1,
41 /* Invalid command */
42 AGENT_RET_CODE_INVALID = 2,
43 /* Unknown logger name */
44 AGENT_RET_CODE_UNKNOWN_NAME = 3,
45 AGENT_RET_CODE_NR,
46 };
47
48 /*
49 * Agent application communication header.
50 */
51 struct lttcomm_agent_hdr {
52 uint64_t data_size; /* data size following this header */
53 uint32_t cmd; /* Enum of agent command. */
54 uint32_t cmd_version; /* command version */
55 } LTTNG_PACKED;
56
57 /*
58 * Enable event command payload. Will be immediately followed by the
59 * variable-length string representing the filter expression.
60 */
61 struct lttcomm_agent_enable {
62 uint32_t loglevel_value;
63 uint32_t loglevel_type;
64 char name[LTTNG_SYMBOL_NAME_LEN];
65 uint32_t filter_expression_length;
66 } LTTNG_PACKED;
67
68 /*
69 * Disable event command payload.
70 */
71 struct lttcomm_agent_disable {
72 char name[LTTNG_SYMBOL_NAME_LEN];
73 } LTTNG_PACKED;
74
75 /*
76 * Generic reply coming from the agent.
77 */
78 struct lttcomm_agent_generic_reply {
79 uint32_t ret_code;
80 } LTTNG_PACKED;
81
82 /*
83 * List command reply header.
84 */
85 struct lttcomm_agent_list_reply_hdr {
86 uint32_t ret_code;
87 uint32_t data_size;
88 } LTTNG_PACKED;
89
90 /*
91 * List command reply payload coming from the agent.
92 */
93 struct lttcomm_agent_list_reply {
94 uint32_t nb_event;
95 /* List of event name each of them ending by a NULL byte. */
96 char payload[];
97 } LTTNG_PACKED;
98
99 #endif /* AGENT_COMM */
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