Add the load session API call
[lttng-tools.git] / src / lib / lttng-ctl / load.c
CommitLineData
9245bd0e
DG
1/*
2 * Copyright (C) 2014 - 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#define _GNU_SOURCE
19#include <assert.h>
20#include <string.h>
21
22#include <lttng/lttng-error.h>
23#include <lttng/load.h>
24#include <lttng/load-internal.h>
25#include <common/sessiond-comm/sessiond-comm.h>
26#include <common/config/config.h>
27
28#include "lttng-ctl-helper.h"
29
30struct lttng_load_session_attr *lttng_load_session_attr_create(void)
31{
32 return zmalloc(sizeof(struct lttng_load_session_attr));
33}
34
35void lttng_load_session_attr_destroy(struct lttng_load_session_attr *attr)
36{
37 if (attr) {
38 free(attr);
39 }
40}
41
42const char *lttng_load_session_attr_get_session_name(
43 struct lttng_load_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
54const char *lttng_load_session_attr_get_input_url(
55 struct lttng_load_session_attr *attr)
56{
57 const char *ret = NULL;
58
59 if (attr && attr->input_url[0]) {
60 ret = attr->input_url;
61 }
62
63 return ret;
64}
65
66int lttng_load_session_attr_get_overwrite(
67 struct lttng_load_session_attr *attr)
68{
69 return attr ? attr->overwrite : -LTTNG_ERR_INVALID;
70}
71
72int lttng_load_session_attr_set_session_name(
73 struct lttng_load_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 >= 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 }
95error:
96 return ret;
97}
98
99int lttng_load_session_attr_set_input_url(
100 struct lttng_load_session_attr *attr, const char *url)
101{
102 int ret = 0;
103 size_t len, size;
104 struct lttng_uri *uris = NULL;
105
106 if (!attr) {
107 ret = -LTTNG_ERR_INVALID;
108 goto error;
109 }
110
111 if (!url) {
112 attr->input_url[0] = '\0';
113 ret = 0;
114 goto end;
115 }
116
117 len = strlen(url);
118 if (len >= PATH_MAX) {
119 ret = -LTTNG_ERR_INVALID;
120 goto error;
121 }
122
123 size = uri_parse_str_urls(url, NULL, &uris);
124 if (size <= 0 || uris[0].dtype != LTTNG_DST_PATH) {
125 ret = -LTTNG_ERR_INVALID;
126 goto error;
127 }
128
129 /* Copy string plus the NULL terminated byte. */
130 lttng_ctl_copy_string(attr->input_url, uris[0].dst.path,
131 sizeof(attr->input_url));
132
133end:
134error:
135 free(uris);
136 return ret;
137}
138
139int lttng_load_session_attr_set_overwrite(
140 struct lttng_load_session_attr *attr, int overwrite)
141{
142 int ret = 0;
143
144 if (!attr) {
145 ret = -LTTNG_ERR_INVALID;
146 goto end;
147 }
148
149 attr->overwrite = !!overwrite;
150end:
151 return ret;
152}
153
154/*
155 * The lttng-ctl API does not expose all the information needed to load the
156 * session configurations. Thus, we must send a load command to the session
157 * daemon which will, in turn, load its current session configuration.
158 */
159int lttng_load_session(struct lttng_load_session_attr *attr)
160{
161 int ret;
162
163 if (!attr) {
164 ret = -LTTNG_ERR_INVALID;
165 goto end;
166 }
167
168 ret = config_load_session(attr->input_url, attr->session_name,
169 attr->overwrite);
170
171end:
172 return ret;
173}
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