Commit | Line | Data |
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f3ed775e DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
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 | * | |
d14d33bf AM |
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. | |
f3ed775e DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
f3ed775e DG |
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> | |
20fb9e02 | 26 | #include <stdbool.h> |
8bb32452 | 27 | #include <lttng/lttng.h> |
f3ed775e | 28 | |
c399183f | 29 | #include "../command.h" |
f3ed775e | 30 | |
65f25c66 | 31 | #include <common/mi-lttng.h> |
42224349 | 32 | #include <common/sessiond-comm/sessiond-comm.h> |
1dac0189 | 33 | #include <common/utils.h> |
42224349 | 34 | |
fd076c09 | 35 | static char *opt_session_name; |
b09ee5ba | 36 | static int opt_destroy_all; |
e20ee7c2 | 37 | static int opt_no_wait; |
f3ed775e | 38 | |
4fc83d94 PP |
39 | #ifdef LTTNG_EMBED_HELP |
40 | static const char help_msg[] = | |
41 | #include <lttng-destroy.1.h> | |
42 | ; | |
43 | #endif | |
44 | ||
65f25c66 JRJ |
45 | /* Mi writer */ |
46 | static struct mi_writer *writer; | |
47 | ||
f3ed775e DG |
48 | enum { |
49 | OPT_HELP = 1, | |
679b4943 | 50 | OPT_LIST_OPTIONS, |
f3ed775e DG |
51 | }; |
52 | ||
53 | static struct poptOption long_options[] = { | |
54 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
55 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
b09ee5ba | 56 | {"all", 'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0}, |
679b4943 | 57 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
e20ee7c2 | 58 | {"no-wait", 'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0}, |
f3ed775e DG |
59 | {0, 0, 0, 0, 0, 0, 0} |
60 | }; | |
61 | ||
f3ed775e | 62 | /* |
b09ee5ba FG |
63 | * destroy_session |
64 | * | |
65 | * Unregister the provided session to the session daemon. On success, removes | |
66 | * the default configuration. | |
f3ed775e | 67 | */ |
65f25c66 | 68 | static int destroy_session(struct lttng_session *session) |
f3ed775e DG |
69 | { |
70 | int ret; | |
1dac0189 | 71 | char *session_name = NULL; |
20fb9e02 | 72 | bool session_was_stopped; |
8bb32452 JG |
73 | enum lttng_error_code ret_code; |
74 | struct lttng_destruction_handle *handle = NULL; | |
75 | enum lttng_destruction_handle_status status; | |
76 | bool printed_wait_msg = false; | |
77 | enum lttng_rotation_state rotation_state; | |
f3ed775e | 78 | |
e20ee7c2 JD |
79 | ret = lttng_stop_tracing_no_wait(session->name); |
80 | if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) { | |
81 | ERR("%s", lttng_strerror(ret)); | |
82 | } | |
20fb9e02 | 83 | session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED; |
e20ee7c2 | 84 | if (!opt_no_wait) { |
e20ee7c2 JD |
85 | do { |
86 | ret = lttng_data_pending(session->name); | |
87 | if (ret < 0) { | |
88 | /* Return the data available call error. */ | |
89 | goto error; | |
90 | } | |
91 | ||
92 | /* | |
93 | * Data sleep time before retrying (in usec). Don't sleep if the call | |
94 | * returned value indicates availability. | |
95 | */ | |
96 | if (ret) { | |
01f55be4 | 97 | if (!printed_wait_msg) { |
8bb32452 JG |
98 | _MSG("Waiting for destruction of session \"%s\"", |
99 | session->name); | |
100 | printed_wait_msg = true; | |
01f55be4 JG |
101 | fflush(stdout); |
102 | } | |
103 | ||
e20ee7c2 JD |
104 | usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME); |
105 | _MSG("."); | |
106 | fflush(stdout); | |
107 | } | |
108 | } while (ret != 0); | |
e20ee7c2 | 109 | } |
20fb9e02 JD |
110 | if (!session_was_stopped) { |
111 | /* | |
112 | * Don't print the event and packet loss warnings since the user | |
113 | * already saw them when stopping the trace. | |
114 | */ | |
115 | print_session_stats(session->name); | |
116 | } | |
e20ee7c2 | 117 | |
8bb32452 JG |
118 | ret_code = lttng_destroy_session_ext(session->name, &handle); |
119 | if (ret_code != LTTNG_OK) { | |
120 | ret = -ret_code; | |
b09ee5ba | 121 | goto error; |
f3ed775e DG |
122 | } |
123 | ||
8bb32452 JG |
124 | if (opt_no_wait) { |
125 | goto skip_wait_rotation; | |
126 | } | |
127 | ||
128 | do { | |
129 | status = lttng_destruction_handle_wait_for_completion(handle, | |
130 | DEFAULT_DATA_AVAILABILITY_WAIT_TIME); | |
131 | switch (status) { | |
132 | case LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT: | |
133 | if (!printed_wait_msg) { | |
134 | _MSG("Waiting for destruction of session \"%s\"", | |
135 | session->name); | |
136 | printed_wait_msg = true; | |
137 | } | |
138 | _MSG("."); | |
139 | fflush(stdout); | |
140 | break; | |
141 | case LTTNG_DESTRUCTION_HANDLE_STATUS_COMPLETED: | |
142 | break; | |
143 | default: | |
144 | ERR("Failed to wait for the completion of the destruction of session \"%s\"", | |
145 | session->name); | |
146 | ret = -1; | |
147 | goto error; | |
148 | } | |
149 | } while (status == LTTNG_DESTRUCTION_HANDLE_STATUS_TIMEOUT); | |
150 | ||
151 | status = lttng_destruction_handle_get_result(handle, &ret_code); | |
152 | if (status != LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
153 | ERR("Failed to get the result of session destruction"); | |
154 | ret = -1; | |
155 | goto error; | |
156 | } | |
157 | if (ret_code != LTTNG_OK) { | |
158 | ret = -LTTNG_OK; | |
159 | goto error; | |
160 | } | |
161 | ||
162 | status = lttng_destruction_handle_get_rotation_state(handle, | |
163 | &rotation_state); | |
164 | switch (rotation_state) { | |
165 | case LTTNG_ROTATION_STATE_NO_ROTATION: | |
166 | break; | |
167 | case LTTNG_ROTATION_STATE_COMPLETED: | |
168 | { | |
169 | const struct lttng_trace_archive_location *location; | |
170 | ||
171 | status = lttng_destruction_handle_get_archive_location(handle, | |
172 | &location); | |
173 | if (status == LTTNG_DESTRUCTION_HANDLE_STATUS_OK) { | |
174 | if (printed_wait_msg) { | |
175 | MSG(""); | |
176 | printed_wait_msg = false; | |
177 | } | |
178 | ret = print_trace_archive_location(location, | |
179 | session->name); | |
180 | if (ret) { | |
181 | ERR("Failed to print the location of trace archive"); | |
182 | goto skip_wait_rotation; | |
183 | } | |
184 | break; | |
185 | } | |
186 | /* fall-through. */ | |
187 | } | |
188 | default: | |
189 | ERR("Failed to get the location of the rotation performed during the session's destruction"); | |
190 | goto skip_wait_rotation; | |
191 | } | |
192 | skip_wait_rotation: | |
193 | MSG("%sSession \"%s\" destroyed", printed_wait_msg ? "\n" : "", | |
194 | session->name); | |
1dac0189 PPM |
195 | |
196 | session_name = get_session_name_quiet(); | |
197 | if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { | |
198 | config_destroy_default(); | |
199 | } | |
65f25c66 JRJ |
200 | |
201 | if (lttng_opt_mi) { | |
202 | ret = mi_lttng_session(writer, session, 0); | |
203 | if (ret) { | |
204 | ret = CMD_ERROR; | |
205 | goto error; | |
206 | } | |
207 | } | |
208 | ||
f3ed775e | 209 | ret = CMD_SUCCESS; |
b09ee5ba | 210 | error: |
8bb32452 | 211 | lttng_destruction_handle_destroy(handle); |
1dac0189 | 212 | free(session_name); |
b09ee5ba FG |
213 | return ret; |
214 | } | |
f3ed775e | 215 | |
b09ee5ba FG |
216 | /* |
217 | * destroy_all_sessions | |
218 | * | |
219 | * Call destroy_sessions for each registered sessions | |
220 | */ | |
65f25c66 | 221 | static int destroy_all_sessions(struct lttng_session *sessions, int count) |
b09ee5ba | 222 | { |
65f25c66 | 223 | int i, ret = CMD_SUCCESS; |
b09ee5ba | 224 | |
b09ee5ba FG |
225 | if (count == 0) { |
226 | MSG("No session found, nothing to do."); | |
60e835ca DG |
227 | } else if (count < 0) { |
228 | ERR("%s", lttng_strerror(ret)); | |
229 | goto error; | |
b09ee5ba | 230 | } |
60e835ca | 231 | |
b09ee5ba | 232 | for (i = 0; i < count; i++) { |
65f25c66 | 233 | ret = destroy_session(&sessions[i]); |
b09ee5ba FG |
234 | if (ret < 0) { |
235 | goto error; | |
236 | } | |
b73d0b29 | 237 | } |
f3ed775e DG |
238 | error: |
239 | return ret; | |
240 | } | |
241 | ||
242 | /* | |
843f5df9 | 243 | * The 'destroy <options>' first level command |
f3ed775e DG |
244 | */ |
245 | int cmd_destroy(int argc, const char **argv) | |
246 | { | |
b09ee5ba | 247 | int opt; |
65f25c66 | 248 | int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 249 | static poptContext pc; |
b09ee5ba | 250 | char *session_name = NULL; |
68c7f6e5 | 251 | const char *leftover = NULL; |
f3ed775e | 252 | |
65f25c66 JRJ |
253 | struct lttng_session *sessions; |
254 | int count; | |
255 | int found; | |
256 | ||
f3ed775e DG |
257 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
258 | poptReadDefaultConfig(pc, 0); | |
259 | ||
260 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
261 | switch (opt) { | |
262 | case OPT_HELP: | |
4ba92f18 | 263 | SHOW_HELP(); |
b09ee5ba | 264 | break; |
679b4943 SM |
265 | case OPT_LIST_OPTIONS: |
266 | list_cmd_options(stdout, long_options); | |
b09ee5ba | 267 | break; |
f3ed775e | 268 | default: |
f3ed775e | 269 | ret = CMD_UNDEFINED; |
b09ee5ba | 270 | break; |
f3ed775e | 271 | } |
b09ee5ba | 272 | goto end; |
f3ed775e DG |
273 | } |
274 | ||
65f25c66 | 275 | /* Mi preparation */ |
c7e35b03 | 276 | if (lttng_opt_mi) { |
65f25c66 JRJ |
277 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
278 | if (!writer) { | |
279 | ret = -LTTNG_ERR_NOMEM; | |
280 | goto end; | |
281 | } | |
282 | ||
283 | /* Open command element */ | |
284 | ret = mi_lttng_writer_command_open(writer, | |
285 | mi_lttng_element_command_destroy); | |
286 | if (ret) { | |
287 | ret = CMD_ERROR; | |
288 | goto end; | |
289 | } | |
290 | ||
291 | /* Open output element */ | |
292 | ret = mi_lttng_writer_open_element(writer, | |
293 | mi_lttng_element_command_output); | |
294 | if (ret) { | |
295 | ret = CMD_ERROR; | |
296 | goto end; | |
297 | } | |
298 | ||
299 | /* For validation and semantic purpose we open a sessions element */ | |
300 | ret = mi_lttng_sessions_open(writer); | |
301 | if (ret) { | |
302 | ret = CMD_ERROR; | |
303 | goto end; | |
304 | } | |
305 | } | |
306 | ||
307 | /* Recuperate all sessions for further operation */ | |
308 | count = lttng_list_sessions(&sessions); | |
309 | if (count < 0) { | |
56c3ec9e JR |
310 | ERR("%s", lttng_strerror(count)); |
311 | command_ret = CMD_ERROR; | |
65f25c66 JRJ |
312 | success = 0; |
313 | goto mi_closing; | |
c7e35b03 JR |
314 | } |
315 | ||
fd076c09 | 316 | /* Ignore session name in case all sessions are to be destroyed */ |
b09ee5ba | 317 | if (opt_destroy_all) { |
65f25c66 JRJ |
318 | command_ret = destroy_all_sessions(sessions, count); |
319 | if (command_ret) { | |
320 | success = 0; | |
321 | } | |
322 | } else { | |
323 | opt_session_name = (char *) poptGetArg(pc); | |
324 | ||
1dac0189 | 325 | if (!opt_session_name) { |
65f25c66 JRJ |
326 | /* No session name specified, lookup default */ |
327 | session_name = get_session_name(); | |
328 | if (session_name == NULL) { | |
329 | command_ret = CMD_ERROR; | |
330 | success = 0; | |
331 | goto mi_closing; | |
332 | } | |
333 | } else { | |
334 | session_name = opt_session_name; | |
335 | } | |
fd076c09 | 336 | |
65f25c66 JRJ |
337 | /* Find the corresponding lttng_session struct */ |
338 | found = 0; | |
339 | for (i = 0; i < count; i++) { | |
340 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
341 | found = 1; | |
342 | command_ret = destroy_session(&sessions[i]); | |
343 | if (command_ret) { | |
344 | success = 0; | |
345 | } | |
fd076c09 | 346 | |
65f25c66 JRJ |
347 | } |
348 | } | |
349 | ||
350 | if (!found) { | |
351 | ERR("Session name %s not found", session_name); | |
352 | command_ret = LTTNG_ERR_SESS_NOT_FOUND; | |
353 | success = 0; | |
354 | goto mi_closing; | |
355 | } | |
356 | } | |
357 | ||
68c7f6e5 JD |
358 | leftover = poptGetArg(pc); |
359 | if (leftover) { | |
360 | ERR("Unknown argument: %s", leftover); | |
361 | ret = CMD_ERROR; | |
362 | success = 0; | |
363 | goto mi_closing; | |
364 | } | |
365 | ||
65f25c66 JRJ |
366 | mi_closing: |
367 | /* Mi closing */ | |
368 | if (lttng_opt_mi) { | |
369 | /* Close sessions and output element element */ | |
370 | ret = mi_lttng_close_multi_element(writer, 2); | |
371 | if (ret) { | |
fd076c09 | 372 | ret = CMD_ERROR; |
b09ee5ba FG |
373 | goto end; |
374 | } | |
fd076c09 | 375 | |
65f25c66 JRJ |
376 | /* Success ? */ |
377 | ret = mi_lttng_writer_write_element_bool(writer, | |
378 | mi_lttng_element_command_success, success); | |
379 | if (ret) { | |
380 | ret = CMD_ERROR; | |
381 | goto end; | |
382 | } | |
f3ed775e | 383 | |
65f25c66 JRJ |
384 | /* Command element close */ |
385 | ret = mi_lttng_writer_command_close(writer); | |
386 | if (ret) { | |
387 | ret = CMD_ERROR; | |
388 | goto end; | |
389 | } | |
390 | } | |
f3ed775e | 391 | end: |
65f25c66 JRJ |
392 | /* Mi clean-up */ |
393 | if (writer && mi_lttng_writer_destroy(writer)) { | |
394 | /* Preserve original error code */ | |
395 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
396 | } | |
397 | ||
fd076c09 | 398 | if (opt_session_name == NULL) { |
b09ee5ba FG |
399 | free(session_name); |
400 | } | |
fd076c09 | 401 | |
65f25c66 JRJ |
402 | /* Overwrite ret if an error occurred during destroy_session/all */ |
403 | ret = command_ret ? command_ret : ret; | |
404 | ||
fd076c09 | 405 | poptFreeContext(pc); |
f3ed775e DG |
406 | return ret; |
407 | } |