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cac3069d DG |
1 | /* |
2 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This library 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 Lesser General Public License | |
11 | * for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU Lesser General Public License | |
14 | * along with this library; if not, write to the Free Software Foundation, | |
15 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
16 | */ | |
17 | ||
18 | #ifndef LTTNG_CTL_HELPER_H | |
19 | #define LTTNG_CTL_HELPER_H | |
20 | ||
cac3069d DG |
21 | #include <stdio.h> |
22 | ||
23 | #include <common/sessiond-comm/sessiond-comm.h> | |
24 | #include <lttng/lttng.h> | |
25 | ||
26 | /* | |
27 | * NOTE: Every symbol in this helper header MUST be set to hidden so not to | |
28 | * polute the library name space. Use LTTNG_HIDDEN macro before declaring the | |
29 | * function in the C file. | |
30 | */ | |
31 | ||
32 | /* Copy helper functions. */ | |
33 | void lttng_ctl_copy_string(char *dst, const char *src, size_t len); | |
34 | void lttng_ctl_copy_lttng_domain(struct lttng_domain *dst, | |
35 | struct lttng_domain *src); | |
36 | ||
37 | /* | |
c2d69327 | 38 | * Sends the lttcomm message to the session daemon and fills buf if the |
cac3069d DG |
39 | * returned data is not NULL. |
40 | * | |
41 | * Return the size of the received data on success or else a negative lttng | |
42 | * error code. If buf is NULL, 0 is returned on success. | |
43 | */ | |
a04d53fc FD |
44 | int lttng_ctl_ask_sessiond_fds_varlen(struct lttcomm_session_msg *lsm, |
45 | const int *fds, size_t nb_fd, | |
795a978d PP |
46 | const void *vardata, size_t vardata_len, |
47 | void **user_payload_buf, void **user_cmd_header_buf, | |
48 | size_t *user_cmd_header_len); | |
49 | ||
50 | /* | |
a04d53fc | 51 | * Calls lttng_ctl_ask_sessiond_fds_varlen() with no expected command header. |
795a978d PP |
52 | */ |
53 | static inline | |
54 | int lttng_ctl_ask_sessiond_varlen_no_cmd_header(struct lttcomm_session_msg *lsm, | |
55 | void *vardata, size_t vardata_len, void **user_payload_buf) | |
56 | { | |
a04d53fc | 57 | return lttng_ctl_ask_sessiond_fds_varlen(lsm, NULL, 0, vardata, |
795a978d PP |
58 | vardata_len, user_payload_buf, NULL, NULL); |
59 | } | |
cac3069d | 60 | |
a04d53fc FD |
61 | /* |
62 | * Calls lttng_ctl_ask_sessiond_fds_varlen() with fds and no expected command header. | |
63 | */ | |
64 | static inline | |
65 | int lttng_ctl_ask_sessiond_fds_no_cmd_header(struct lttcomm_session_msg *lsm, | |
66 | const int *fds, size_t nb_fd, void **buf) | |
67 | { | |
68 | return lttng_ctl_ask_sessiond_fds_varlen(lsm, fds, nb_fd, NULL, | |
69 | 0, NULL, NULL, NULL); | |
70 | } | |
cac3069d DG |
71 | /* |
72 | * Use this if no variable length data needs to be sent. | |
73 | */ | |
74 | static inline | |
75 | int lttng_ctl_ask_sessiond(struct lttcomm_session_msg *lsm, void **buf) | |
76 | { | |
795a978d | 77 | return lttng_ctl_ask_sessiond_varlen_no_cmd_header(lsm, NULL, 0, buf); |
cac3069d DG |
78 | } |
79 | ||
6c71277b MD |
80 | int lttng_check_tracing_group(void); |
81 | ||
cac3069d | 82 | #endif /* LTTNG_CTL_HELPER_H */ |