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259c2674 JD |
1 | /* |
2 | * Copyright (C) 2017 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along | |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _LGPL_SOURCE | |
19 | #include <popt.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
26 | #include <inttypes.h> | |
27 | #include <ctype.h> | |
28 | ||
29 | #include <common/sessiond-comm/sessiond-comm.h> | |
30 | #include <common/mi-lttng.h> | |
31 | ||
32 | #include "../command.h" | |
33 | #include <lttng/rotation.h> | |
34 | ||
35 | static char *opt_session_name; | |
36 | static struct mi_writer *writer; | |
37 | ||
3ae5c539 JD |
38 | #ifdef LTTNG_EMBED_HELP |
39 | static const char help_msg[] = | |
40 | #include <lttng-disable-rotation.1.h> | |
41 | ; | |
42 | #endif | |
43 | ||
259c2674 JD |
44 | enum { |
45 | OPT_HELP = 1, | |
46 | OPT_LIST_OPTIONS, | |
47 | OPT_TIMER, | |
90936dcf | 48 | OPT_SIZE, |
259c2674 JD |
49 | }; |
50 | ||
51 | static struct poptOption long_options[] = { | |
52 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
66ea93b1 JG |
53 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, |
54 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, | |
55 | {"session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
259c2674 | 56 | {"timer", 0, POPT_ARG_NONE, 0, OPT_TIMER, 0, 0}, |
90936dcf | 57 | {"size", 0, POPT_ARG_NONE, 0, OPT_SIZE, 0, 0}, |
259c2674 JD |
58 | {0, 0, 0, 0, 0, 0, 0} |
59 | }; | |
60 | ||
66ea93b1 JG |
61 | static const char *schedule_type_str[] = { |
62 | [LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC] = "periodic", | |
63 | [LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD] = "size-based", | |
64 | }; | |
65 | ||
66 | static const struct lttng_rotation_schedule *get_schedule( | |
67 | const char *session_name, | |
68 | const struct lttng_rotation_schedules *schedules, | |
69 | enum lttng_rotation_schedule_type schedule_type) | |
259c2674 | 70 | { |
66ea93b1 JG |
71 | unsigned int count, i; |
72 | enum lttng_rotation_status status; | |
73 | const struct lttng_rotation_schedule *ret = NULL; | |
259c2674 | 74 | |
66ea93b1 JG |
75 | status = lttng_rotation_schedules_get_count(schedules, &count); |
76 | if (status != LTTNG_ROTATION_STATUS_OK) { | |
77 | ERR("Unable to determine the number of rotation schedules of session %s", | |
78 | session_name); | |
79 | goto end; | |
259c2674 JD |
80 | } |
81 | ||
66ea93b1 JG |
82 | for (i = 0; i < count; i++) { |
83 | const struct lttng_rotation_schedule *schedule = NULL; | |
84 | ||
85 | schedule = lttng_rotation_schedules_get_at_index(schedules, i); | |
86 | if (!schedule) { | |
87 | ERR("Unable to retrieve rotation schedule at index %u", | |
88 | i); | |
89 | goto end; | |
259c2674 | 90 | } |
259c2674 | 91 | |
66ea93b1 JG |
92 | if (lttng_rotation_schedule_get_type(schedule) == |
93 | schedule_type) { | |
94 | ret = schedule; | |
95 | break; | |
259c2674 JD |
96 | } |
97 | } | |
98 | ||
66ea93b1 JG |
99 | if (!ret) { |
100 | ERR("No %s rotation schedule active on session %s", | |
101 | schedule_type_str[schedule_type], session_name); | |
259c2674 | 102 | } |
66ea93b1 JG |
103 | end: |
104 | return ret; | |
105 | } | |
106 | ||
107 | static struct lttng_rotation_schedule *create_empty_schedule( | |
108 | enum lttng_rotation_schedule_type type) | |
109 | { | |
110 | struct lttng_rotation_schedule *schedule = NULL; | |
111 | ||
112 | switch (type) { | |
113 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
114 | schedule = lttng_rotation_schedule_periodic_create(); | |
115 | break; | |
116 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
117 | schedule = lttng_rotation_schedule_size_threshold_create(); | |
118 | break; | |
119 | default: | |
120 | abort(); | |
90936dcf | 121 | } |
66ea93b1 JG |
122 | return schedule; |
123 | } | |
259c2674 | 124 | |
66ea93b1 JG |
125 | static enum cmd_error_code remove_schedule(const char *session_name, |
126 | enum lttng_rotation_schedule_type schedule_type) | |
127 | { | |
128 | enum cmd_error_code cmd_ret; | |
129 | int ret; | |
130 | const struct lttng_rotation_schedule *schedule = NULL; | |
131 | struct lttng_rotation_schedules *schedules = NULL; | |
132 | enum lttng_rotation_status status; | |
133 | const char *schedule_type_name; | |
134 | struct lttng_rotation_schedule *empty_schedule = NULL; | |
135 | ||
136 | switch (schedule_type) { | |
137 | case LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC: | |
138 | case LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD: | |
139 | break; | |
140 | default: | |
141 | ERR("Unknown schedule type"); | |
142 | abort(); | |
143 | } | |
144 | ||
145 | schedule_type_name = schedule_type_str[schedule_type]; | |
146 | ||
147 | ret = lttng_session_list_rotation_schedules(session_name, &schedules); | |
148 | if (ret != LTTNG_OK) { | |
149 | ERR("Failed to list rotation schedules of session %s", | |
150 | session_name); | |
259c2674 JD |
151 | goto error; |
152 | } | |
153 | ||
66ea93b1 JG |
154 | schedule = get_schedule(session_name, schedules, schedule_type); |
155 | if (!schedule) { | |
156 | cmd_ret = CMD_ERROR; | |
157 | /* | |
158 | * get_schedule() logs its own errors. | |
159 | * A temporaty schedule is created to serialize an MI rotation | |
160 | * schedule descriptor of the appropriate type that has no | |
161 | * attributes set. | |
162 | */ | |
163 | empty_schedule = create_empty_schedule(schedule_type); | |
164 | if (!empty_schedule) { | |
165 | goto error; | |
259c2674 | 166 | } |
66ea93b1 JG |
167 | goto skip_removal; |
168 | } | |
259c2674 | 169 | |
66ea93b1 JG |
170 | status = lttng_session_remove_rotation_schedule(session_name, schedule); |
171 | switch (status) { | |
172 | case LTTNG_ROTATION_STATUS_OK: | |
173 | MSG("Disabled %s rotation on session %s", | |
174 | schedule_type_name, session_name); | |
175 | cmd_ret = CMD_SUCCESS; | |
176 | break; | |
177 | case LTTNG_ROTATION_STATUS_SCHEDULE_NOT_SET: | |
178 | ERR("No %s rotation schedule set on session %s", | |
179 | schedule_type_name, | |
180 | session_name); | |
181 | cmd_ret = CMD_ERROR; | |
182 | break; | |
183 | case LTTNG_ROTATION_STATUS_ERROR: | |
184 | case LTTNG_ROTATION_STATUS_INVALID: | |
185 | default: | |
186 | ERR("Failed to disable %s rotation schedule on session %s", | |
187 | schedule_type_name, session_name); | |
188 | cmd_ret = CMD_ERROR; | |
189 | break; | |
259c2674 JD |
190 | } |
191 | ||
66ea93b1 JG |
192 | skip_removal: |
193 | if (lttng_opt_mi) { | |
194 | ret = mi_lttng_rotation_schedule_result(writer, | |
195 | schedule ? schedule : empty_schedule, | |
196 | cmd_ret == CMD_SUCCESS); | |
197 | if (ret < 0) { | |
198 | goto error; | |
199 | } | |
200 | } | |
259c2674 | 201 | |
259c2674 | 202 | end: |
66ea93b1 JG |
203 | lttng_rotation_schedules_destroy(schedules); |
204 | lttng_rotation_schedule_destroy(empty_schedule); | |
205 | return cmd_ret; | |
206 | error: | |
207 | cmd_ret = CMD_ERROR; | |
208 | goto end; | |
259c2674 JD |
209 | } |
210 | ||
211 | /* | |
212 | * cmd_disable_rotation | |
213 | * | |
66ea93b1 | 214 | * The 'disable-rotation <options>' first level command |
259c2674 JD |
215 | */ |
216 | int cmd_disable_rotation(int argc, const char **argv) | |
217 | { | |
66ea93b1 JG |
218 | int popt_ret, opt, ret = 0; |
219 | enum cmd_error_code cmd_ret = CMD_SUCCESS; | |
259c2674 JD |
220 | static poptContext pc; |
221 | char *session_name = NULL; | |
222 | bool free_session_name = false; | |
66ea93b1 | 223 | bool periodic_rotation = false, size_rotation = false; |
259c2674 JD |
224 | |
225 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
226 | popt_ret = poptReadDefaultConfig(pc, 0); | |
227 | if (popt_ret) { | |
62140c46 | 228 | cmd_ret = CMD_ERROR; |
259c2674 JD |
229 | ERR("poptReadDefaultConfig"); |
230 | goto end; | |
231 | } | |
232 | ||
233 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
234 | switch (opt) { | |
235 | case OPT_HELP: | |
236 | SHOW_HELP(); | |
237 | goto end; | |
238 | case OPT_LIST_OPTIONS: | |
239 | list_cmd_options(stdout, long_options); | |
240 | goto end; | |
241 | case OPT_TIMER: | |
66ea93b1 | 242 | periodic_rotation = true; |
259c2674 | 243 | break; |
90936dcf | 244 | case OPT_SIZE: |
66ea93b1 | 245 | size_rotation = true; |
90936dcf | 246 | break; |
259c2674 | 247 | default: |
62140c46 | 248 | cmd_ret = CMD_UNDEFINED; |
259c2674 JD |
249 | goto end; |
250 | } | |
251 | } | |
252 | ||
253 | if (opt_session_name == NULL) { | |
254 | session_name = get_session_name(); | |
255 | if (session_name == NULL) { | |
66ea93b1 | 256 | goto error; |
259c2674 JD |
257 | } |
258 | free_session_name = true; | |
259 | } else { | |
260 | session_name = opt_session_name; | |
261 | } | |
262 | ||
263 | /* Mi check */ | |
264 | if (lttng_opt_mi) { | |
265 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
266 | if (!writer) { | |
66ea93b1 | 267 | goto error; |
259c2674 JD |
268 | } |
269 | ||
270 | /* Open command element */ | |
271 | ret = mi_lttng_writer_command_open(writer, | |
272 | mi_lttng_element_command_disable_rotation); | |
273 | if (ret) { | |
66ea93b1 | 274 | goto error; |
259c2674 JD |
275 | } |
276 | ||
277 | /* Open output element */ | |
278 | ret = mi_lttng_writer_open_element(writer, | |
279 | mi_lttng_element_command_output); | |
280 | if (ret) { | |
66ea93b1 | 281 | goto error; |
259c2674 JD |
282 | } |
283 | } | |
284 | ||
66ea93b1 JG |
285 | if (!periodic_rotation && !size_rotation) { |
286 | ERR("No session rotation schedule type provided."); | |
287 | cmd_ret = CMD_ERROR; | |
288 | goto close_command; | |
259c2674 JD |
289 | } |
290 | ||
66ea93b1 JG |
291 | if (lttng_opt_mi) { |
292 | ret = mi_lttng_writer_open_element(writer, | |
293 | mi_lttng_element_rotation_schedule_results); | |
294 | if (ret) { | |
295 | goto error; | |
296 | } | |
297 | ||
298 | ret = mi_lttng_writer_write_element_string(writer, | |
299 | mi_lttng_element_session_name, | |
300 | session_name); | |
301 | if (ret) { | |
302 | goto error; | |
303 | } | |
259c2674 JD |
304 | } |
305 | ||
66ea93b1 JG |
306 | if (periodic_rotation) { |
307 | /* | |
308 | * Continue processing even on error as multiple schedules can | |
309 | * be specified at once. | |
310 | */ | |
311 | cmd_ret = remove_schedule(session_name, | |
312 | LTTNG_ROTATION_SCHEDULE_TYPE_PERIODIC); | |
313 | } | |
314 | ||
315 | if (size_rotation) { | |
a14a81cb | 316 | enum cmd_error_code tmp_ret; |
66ea93b1 JG |
317 | |
318 | /* Don't overwrite cmd_ret if it already indicates an error. */ | |
319 | tmp_ret = remove_schedule(session_name, | |
320 | LTTNG_ROTATION_SCHEDULE_TYPE_SIZE_THRESHOLD); | |
321 | cmd_ret = cmd_ret ? cmd_ret : tmp_ret; | |
322 | } | |
323 | ||
324 | if (lttng_opt_mi) { | |
325 | /* Close rotation schedule results element */ | |
326 | ret = mi_lttng_writer_close_element(writer); | |
327 | if (ret) { | |
328 | goto error; | |
329 | } | |
330 | } | |
331 | ||
332 | close_command: | |
259c2674 JD |
333 | /* Mi closing */ |
334 | if (lttng_opt_mi) { | |
335 | /* Close output element */ | |
336 | ret = mi_lttng_writer_close_element(writer); | |
337 | if (ret) { | |
66ea93b1 | 338 | goto error; |
259c2674 JD |
339 | } |
340 | ||
341 | /* Success ? */ | |
342 | ret = mi_lttng_writer_write_element_bool(writer, | |
66ea93b1 JG |
343 | mi_lttng_element_command_success, |
344 | cmd_ret == CMD_SUCCESS); | |
259c2674 | 345 | if (ret) { |
66ea93b1 | 346 | goto error; |
259c2674 JD |
347 | } |
348 | ||
349 | /* Command element close */ | |
350 | ret = mi_lttng_writer_command_close(writer); | |
351 | if (ret) { | |
66ea93b1 | 352 | goto error; |
259c2674 JD |
353 | } |
354 | } | |
355 | ||
356 | end: | |
66ea93b1 | 357 | (void) mi_lttng_writer_destroy(writer); |
259c2674 JD |
358 | poptFreeContext(pc); |
359 | if (free_session_name) { | |
360 | free(session_name); | |
361 | } | |
66ea93b1 JG |
362 | return cmd_ret; |
363 | error: | |
364 | cmd_ret = CMD_ERROR; | |
365 | goto end; | |
259c2674 | 366 | } |