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d68c9a04 JD |
1 | /* |
2 | * Copyright (C) 2017 - Julien Desfossez <jdesfossez@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 _LGPL_SOURCE | |
19 | #include <assert.h> | |
20 | #include <string.h> | |
21 | ||
22 | #include <lttng/lttng-error.h> | |
23 | #include <lttng/rotation.h> | |
24 | #include <lttng/rotate-internal.h> | |
25 | #include <common/sessiond-comm/sessiond-comm.h> | |
26 | #include <common/macros.h> | |
27 | ||
28 | #include "lttng-ctl-helper.h" | |
29 | ||
30 | struct lttng_rotation_immediate_attr *lttng_rotation_immediate_attr_create(void) | |
31 | { | |
32 | return zmalloc(sizeof(struct lttng_rotation_immediate_attr)); | |
33 | } | |
34 | ||
35 | void lttng_rotation_immediate_attr_destroy( | |
36 | struct lttng_rotation_immediate_attr *attr) | |
37 | { | |
38 | free(attr); | |
39 | } | |
40 | ||
41 | enum lttng_rotation_status lttng_rotation_immediate_attr_set_session_name( | |
42 | struct lttng_rotation_immediate_attr *attr, | |
43 | const char *session_name) | |
44 | { | |
45 | enum lttng_rotation_status status = LTTNG_ROTATION_STATUS_OK; | |
46 | int ret; | |
47 | ||
48 | if (!attr || !session_name) { | |
49 | status = LTTNG_ROTATION_STATUS_INVALID; | |
50 | goto error; | |
51 | } | |
52 | ||
53 | ret = lttng_strncpy(attr->session_name, session_name, | |
54 | sizeof(attr->session_name)); | |
55 | if (ret) { | |
56 | status = LTTNG_ROTATION_STATUS_INVALID; | |
57 | goto error; | |
58 | } | |
59 | ||
60 | error: | |
61 | return status; | |
62 | } | |
63 | ||
64 | static | |
65 | enum lttng_rotation_status ask_rotation_info( | |
66 | struct lttng_rotation_handle *rotation_handle, | |
67 | struct lttng_rotation_get_info_return **info) | |
68 | { | |
69 | /* lsm.get_rotation_state.rotation_id */ | |
70 | struct lttcomm_session_msg lsm; | |
71 | enum lttng_rotation_status status = LTTNG_ROTATION_STATUS_OK; | |
72 | int ret; | |
73 | ||
74 | if (!rotation_handle || !info) { | |
75 | status = LTTNG_ROTATION_STATUS_INVALID; | |
76 | goto end; | |
77 | } | |
78 | ||
79 | memset(&lsm, 0, sizeof(lsm)); | |
80 | lsm.cmd_type = LTTNG_ROTATION_GET_INFO; | |
81 | lsm.u.get_rotation_info.rotation_id = rotation_handle->rotation_id; | |
82 | ||
83 | ret = lttng_strncpy(lsm.session.name, rotation_handle->session_name, | |
84 | sizeof(lsm.session.name)); | |
85 | if (ret) { | |
86 | status = LTTNG_ROTATION_STATUS_INVALID; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) info); | |
91 | if (ret < 0) { | |
92 | status = LTTNG_ROTATION_STATUS_ERROR; | |
93 | goto end; | |
94 | } | |
95 | end: | |
96 | return status; | |
97 | ||
98 | } | |
99 | ||
100 | enum lttng_rotation_status lttng_rotation_handle_get_state( | |
101 | struct lttng_rotation_handle *rotation_handle, | |
102 | enum lttng_rotation_state *state) | |
103 | { | |
104 | enum lttng_rotation_status status = LTTNG_ROTATION_STATUS_OK; | |
105 | struct lttng_rotation_get_info_return *info = NULL; | |
106 | int ret; | |
107 | ||
108 | if (!rotation_handle || !state) { | |
109 | status = LTTNG_ROTATION_STATUS_INVALID; | |
110 | goto end; | |
111 | } | |
112 | ||
113 | status = ask_rotation_info(rotation_handle, &info); | |
114 | if (status != LTTNG_ROTATION_STATUS_OK) { | |
115 | goto end; | |
116 | } | |
117 | ||
118 | *state = (enum lttng_rotation_state) info->status; | |
119 | if (rotation_handle->archive_location.is_set || | |
120 | *state != LTTNG_ROTATION_STATE_COMPLETED) { | |
121 | /* | |
122 | * The path is only provided by the sessiond once | |
123 | * the session rotation is completed, but not expired. | |
124 | */ | |
125 | goto end; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Cache the location since the rotation may expire before the user | |
130 | * has a chance to query it. | |
131 | */ | |
132 | ret = lttng_strncpy(rotation_handle->archive_location.path, | |
133 | info->path, | |
134 | sizeof(rotation_handle->archive_location.path)); | |
135 | if (ret) { | |
136 | status = LTTNG_ROTATION_STATUS_ERROR; | |
137 | goto end; | |
138 | } | |
139 | rotation_handle->archive_location.is_set = true; | |
140 | end: | |
141 | free(info); | |
142 | return status; | |
143 | } | |
144 | ||
145 | enum lttng_rotation_status lttng_rotation_handle_get_completed_archive_location( | |
146 | struct lttng_rotation_handle *rotation_handle, | |
147 | const char **path) | |
148 | { | |
149 | int ret; | |
150 | enum lttng_rotation_status status = LTTNG_ROTATION_STATUS_OK; | |
151 | struct lttng_rotation_get_info_return *info = NULL; | |
152 | ||
153 | if (!rotation_handle || !path) { | |
154 | status = LTTNG_ROTATION_STATUS_INVALID; | |
155 | goto end; | |
156 | } | |
157 | ||
158 | /* Use the cached location we got from a previous query. */ | |
159 | if (rotation_handle->archive_location.is_set) { | |
160 | *path = rotation_handle->archive_location.path; | |
161 | goto end; | |
162 | } | |
163 | ||
164 | status = ask_rotation_info(rotation_handle, &info); | |
165 | if (status != LTTNG_ROTATION_STATUS_OK) { | |
166 | goto end; | |
167 | } | |
168 | ||
169 | if ((enum lttng_rotation_state) info->status != | |
170 | LTTNG_ROTATION_STATE_COMPLETED) { | |
171 | status = LTTNG_ROTATION_STATUS_UNAVAILABLE; | |
172 | goto end; | |
173 | } | |
174 | ||
175 | ret = lttng_strncpy(rotation_handle->archive_location.path, | |
176 | info->path, | |
177 | sizeof(rotation_handle->archive_location.path)); | |
178 | if (ret) { | |
179 | status = LTTNG_ROTATION_STATUS_ERROR; | |
180 | goto end; | |
181 | } | |
182 | rotation_handle->archive_location.is_set = true; | |
183 | end: | |
184 | free(info); | |
185 | return status; | |
186 | } | |
187 | ||
188 | void lttng_rotation_handle_destroy( | |
189 | struct lttng_rotation_handle *rotation_handle) | |
190 | { | |
191 | free(rotation_handle); | |
192 | } | |
193 | ||
194 | static | |
195 | int init_rotation_handle(struct lttng_rotation_handle *rotation_handle, | |
196 | struct lttng_rotate_session_return *rotate_return, | |
197 | struct lttng_rotation_immediate_attr *attr) | |
198 | { | |
199 | int ret; | |
200 | ||
201 | ret = lttng_strncpy(rotation_handle->session_name, attr->session_name, | |
202 | sizeof(rotation_handle->session_name)); | |
203 | if (ret) { | |
204 | goto end; | |
205 | } | |
206 | ||
207 | rotation_handle->rotation_id = rotate_return->rotation_id; | |
208 | end: | |
209 | return ret; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Rotate the output folder of the session. | |
214 | * | |
215 | * Return 0 on success else a negative LTTng error code. | |
216 | */ | |
217 | int lttng_rotate_session(struct lttng_rotation_immediate_attr *attr, | |
218 | struct lttng_rotation_handle **rotation_handle) | |
219 | { | |
220 | struct lttcomm_session_msg lsm; | |
221 | struct lttng_rotate_session_return *rotate_return = NULL; | |
222 | int ret; | |
223 | ||
224 | if (!attr) { | |
225 | ret = -LTTNG_ERR_INVALID; | |
226 | goto end; | |
227 | } | |
228 | ||
229 | memset(&lsm, 0, sizeof(lsm)); | |
230 | lsm.cmd_type = LTTNG_ROTATE_SESSION; | |
231 | lttng_ctl_copy_string(lsm.session.name, attr->session_name, | |
232 | sizeof(lsm.session.name)); | |
233 | ||
234 | ret = lttng_ctl_ask_sessiond(&lsm, (void **) &rotate_return); | |
235 | if (ret < 0) { | |
236 | *rotation_handle = NULL; | |
237 | goto end; | |
238 | } | |
239 | ||
240 | *rotation_handle = zmalloc(sizeof(struct lttng_rotation_handle)); | |
241 | if (!*rotation_handle) { | |
242 | ret = -LTTNG_ERR_NOMEM; | |
243 | goto end; | |
244 | } | |
245 | ||
246 | init_rotation_handle(*rotation_handle, rotate_return, attr); | |
247 | ||
248 | ret = 0; | |
249 | ||
250 | end: | |
251 | free(rotate_return); | |
252 | return ret; | |
253 | } |