d2a7e67c55a14b75719ada6355b970039f292f9c
[lttng-tools.git] / src / lib / lttng-ctl / save.c
1 /*
2 * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@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 #define _GNU_SOURCE
19 #define _LGPL_SOURCE
20 #include <assert.h>
21 #include <string.h>
22
23 #include <lttng/lttng-error.h>
24 #include <lttng/save.h>
25 #include <lttng/save-internal.h>
26 #include <common/sessiond-comm/sessiond-comm.h>
27
28 #include "lttng-ctl-helper.h"
29
30 struct lttng_save_session_attr *lttng_save_session_attr_create(void)
31 {
32 return zmalloc(sizeof(struct lttng_save_session_attr));
33 }
34
35 void lttng_save_session_attr_destroy(struct lttng_save_session_attr *output)
36 {
37 if (output) {
38 free(output);
39 }
40 }
41
42 const char *lttng_save_session_attr_get_session_name(
43 struct lttng_save_session_attr *attr)
44 {
45 const char *ret = NULL;
46
47 if (attr && attr->session_name[0]) {
48 ret = attr->session_name;
49 }
50
51 return ret;
52 }
53
54 const char *lttng_save_session_attr_get_output_url(
55 struct lttng_save_session_attr *attr)
56 {
57 const char *ret = NULL;
58
59 if (attr && attr->configuration_url[0]) {
60 ret = attr->configuration_url;
61 }
62
63 return ret;
64 }
65
66 int lttng_save_session_attr_get_overwrite(
67 struct lttng_save_session_attr *attr)
68 {
69 return attr ? attr->overwrite : -LTTNG_ERR_INVALID;
70 }
71
72 int lttng_save_session_attr_set_session_name(
73 struct lttng_save_session_attr *attr, const char *session_name)
74 {
75 int ret = 0;
76
77 if (!attr) {
78 ret = -LTTNG_ERR_INVALID;
79 goto error;
80 }
81
82 if (session_name) {
83 size_t len;
84
85 len = strlen(session_name);
86 if (len >= LTTNG_NAME_MAX) {
87 ret = -LTTNG_ERR_INVALID;
88 goto error;
89 }
90
91 strncpy(attr->session_name, session_name, len);
92 } else {
93 attr->session_name[0] = '\0';
94 }
95 error:
96 return ret;
97 }
98
99 int lttng_save_session_attr_set_output_url(
100 struct lttng_save_session_attr *attr, const char *url)
101 {
102 int ret = 0;
103 size_t len;
104 ssize_t size;
105 struct lttng_uri *uris = NULL;
106
107 if (!attr) {
108 ret = -LTTNG_ERR_INVALID;
109 goto error;
110 }
111
112 if (!url) {
113 attr->configuration_url[0] = '\0';
114 ret = 0;
115 goto end;
116 }
117
118 len = strlen(url);
119 if (len >= PATH_MAX) {
120 ret = -LTTNG_ERR_INVALID;
121 goto error;
122 }
123
124 size = uri_parse_str_urls(url, NULL, &uris);
125 if (size <= 0 || uris[0].dtype != LTTNG_DST_PATH) {
126 ret = -LTTNG_ERR_INVALID;
127 goto error;
128 }
129
130 /* Copy string plus the NULL terminated byte. */
131 lttng_ctl_copy_string(attr->configuration_url, uris[0].dst.path,
132 sizeof(attr->configuration_url));
133
134 end:
135 error:
136 free(uris);
137 return ret;
138 }
139
140 int lttng_save_session_attr_set_overwrite(
141 struct lttng_save_session_attr *attr, int overwrite)
142 {
143 int ret = 0;
144
145 if (!attr) {
146 ret = -LTTNG_ERR_INVALID;
147 goto end;
148 }
149
150 attr->overwrite = !!overwrite;
151 end:
152 return ret;
153 }
154
155 /*
156 * The lttng-ctl API does not expose all the information needed to save the
157 * session configurations. Thus, we must send a save command to the session
158 * daemon which will, in turn, save its current session configuration.
159 */
160 int lttng_save_session(struct lttng_save_session_attr *attr)
161 {
162 struct lttcomm_session_msg lsm;
163 int ret;
164
165 if (!attr) {
166 ret = -LTTNG_ERR_INVALID;
167 goto end;
168 }
169
170 memset(&lsm, 0, sizeof(lsm));
171 lsm.cmd_type = LTTNG_SAVE_SESSION;
172
173 memcpy(&lsm.u.save_session.attr, attr,
174 sizeof(struct lttng_save_session_attr));
175 ret = lttng_ctl_ask_sessiond(&lsm, NULL);
176 end:
177 return ret;
178 }
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