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> |
bbbfd849 | 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; |
bbbfd849 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) { |
bbbfd849 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 | |
bbbfd849 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 | ||
bbbfd849 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); | |
f16edb77 | 195 | printed_wait_msg = false; |
1dac0189 PPM |
196 | |
197 | session_name = get_session_name_quiet(); | |
198 | if (session_name && !strncmp(session->name, session_name, NAME_MAX)) { | |
199 | config_destroy_default(); | |
200 | } | |
65f25c66 JRJ |
201 | |
202 | if (lttng_opt_mi) { | |
203 | ret = mi_lttng_session(writer, session, 0); | |
204 | if (ret) { | |
205 | ret = CMD_ERROR; | |
206 | goto error; | |
207 | } | |
208 | } | |
209 | ||
f3ed775e | 210 | ret = CMD_SUCCESS; |
b09ee5ba | 211 | error: |
f16edb77 JG |
212 | if (printed_wait_msg) { |
213 | MSG(""); | |
214 | } | |
bbbfd849 | 215 | lttng_destruction_handle_destroy(handle); |
1dac0189 | 216 | free(session_name); |
b09ee5ba FG |
217 | return ret; |
218 | } | |
f3ed775e | 219 | |
b09ee5ba FG |
220 | /* |
221 | * destroy_all_sessions | |
222 | * | |
223 | * Call destroy_sessions for each registered sessions | |
224 | */ | |
65f25c66 | 225 | static int destroy_all_sessions(struct lttng_session *sessions, int count) |
b09ee5ba | 226 | { |
65f25c66 | 227 | int i, ret = CMD_SUCCESS; |
b09ee5ba | 228 | |
b09ee5ba FG |
229 | if (count == 0) { |
230 | MSG("No session found, nothing to do."); | |
60e835ca DG |
231 | } else if (count < 0) { |
232 | ERR("%s", lttng_strerror(ret)); | |
233 | goto error; | |
b09ee5ba | 234 | } |
60e835ca | 235 | |
b09ee5ba | 236 | for (i = 0; i < count; i++) { |
65f25c66 | 237 | ret = destroy_session(&sessions[i]); |
b09ee5ba FG |
238 | if (ret < 0) { |
239 | goto error; | |
240 | } | |
b73d0b29 | 241 | } |
f3ed775e DG |
242 | error: |
243 | return ret; | |
244 | } | |
245 | ||
246 | /* | |
843f5df9 | 247 | * The 'destroy <options>' first level command |
f3ed775e DG |
248 | */ |
249 | int cmd_destroy(int argc, const char **argv) | |
250 | { | |
b09ee5ba | 251 | int opt; |
65f25c66 | 252 | int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1; |
f3ed775e | 253 | static poptContext pc; |
b09ee5ba | 254 | char *session_name = NULL; |
68c7f6e5 | 255 | const char *leftover = NULL; |
f3ed775e | 256 | |
65f25c66 JRJ |
257 | struct lttng_session *sessions; |
258 | int count; | |
259 | int found; | |
260 | ||
f3ed775e DG |
261 | pc = poptGetContext(NULL, argc, argv, long_options, 0); |
262 | poptReadDefaultConfig(pc, 0); | |
263 | ||
264 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
265 | switch (opt) { | |
266 | case OPT_HELP: | |
4ba92f18 | 267 | SHOW_HELP(); |
b09ee5ba | 268 | break; |
679b4943 SM |
269 | case OPT_LIST_OPTIONS: |
270 | list_cmd_options(stdout, long_options); | |
b09ee5ba | 271 | break; |
f3ed775e | 272 | default: |
f3ed775e | 273 | ret = CMD_UNDEFINED; |
b09ee5ba | 274 | break; |
f3ed775e | 275 | } |
b09ee5ba | 276 | goto end; |
f3ed775e DG |
277 | } |
278 | ||
65f25c66 | 279 | /* Mi preparation */ |
c7e35b03 | 280 | if (lttng_opt_mi) { |
65f25c66 JRJ |
281 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); |
282 | if (!writer) { | |
283 | ret = -LTTNG_ERR_NOMEM; | |
284 | goto end; | |
285 | } | |
286 | ||
287 | /* Open command element */ | |
288 | ret = mi_lttng_writer_command_open(writer, | |
289 | mi_lttng_element_command_destroy); | |
290 | if (ret) { | |
291 | ret = CMD_ERROR; | |
292 | goto end; | |
293 | } | |
294 | ||
295 | /* Open output element */ | |
296 | ret = mi_lttng_writer_open_element(writer, | |
297 | mi_lttng_element_command_output); | |
298 | if (ret) { | |
299 | ret = CMD_ERROR; | |
300 | goto end; | |
301 | } | |
302 | ||
303 | /* For validation and semantic purpose we open a sessions element */ | |
304 | ret = mi_lttng_sessions_open(writer); | |
305 | if (ret) { | |
306 | ret = CMD_ERROR; | |
307 | goto end; | |
308 | } | |
309 | } | |
310 | ||
311 | /* Recuperate all sessions for further operation */ | |
312 | count = lttng_list_sessions(&sessions); | |
313 | if (count < 0) { | |
56c3ec9e JR |
314 | ERR("%s", lttng_strerror(count)); |
315 | command_ret = CMD_ERROR; | |
65f25c66 JRJ |
316 | success = 0; |
317 | goto mi_closing; | |
c7e35b03 JR |
318 | } |
319 | ||
fd076c09 | 320 | /* Ignore session name in case all sessions are to be destroyed */ |
b09ee5ba | 321 | if (opt_destroy_all) { |
65f25c66 JRJ |
322 | command_ret = destroy_all_sessions(sessions, count); |
323 | if (command_ret) { | |
324 | success = 0; | |
325 | } | |
326 | } else { | |
327 | opt_session_name = (char *) poptGetArg(pc); | |
328 | ||
1dac0189 | 329 | if (!opt_session_name) { |
65f25c66 JRJ |
330 | /* No session name specified, lookup default */ |
331 | session_name = get_session_name(); | |
332 | if (session_name == NULL) { | |
333 | command_ret = CMD_ERROR; | |
334 | success = 0; | |
335 | goto mi_closing; | |
336 | } | |
337 | } else { | |
338 | session_name = opt_session_name; | |
339 | } | |
fd076c09 | 340 | |
65f25c66 JRJ |
341 | /* Find the corresponding lttng_session struct */ |
342 | found = 0; | |
343 | for (i = 0; i < count; i++) { | |
344 | if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) { | |
345 | found = 1; | |
346 | command_ret = destroy_session(&sessions[i]); | |
347 | if (command_ret) { | |
348 | success = 0; | |
349 | } | |
fd076c09 | 350 | |
65f25c66 JRJ |
351 | } |
352 | } | |
353 | ||
354 | if (!found) { | |
355 | ERR("Session name %s not found", session_name); | |
356 | command_ret = LTTNG_ERR_SESS_NOT_FOUND; | |
357 | success = 0; | |
358 | goto mi_closing; | |
359 | } | |
360 | } | |
361 | ||
68c7f6e5 JD |
362 | leftover = poptGetArg(pc); |
363 | if (leftover) { | |
364 | ERR("Unknown argument: %s", leftover); | |
365 | ret = CMD_ERROR; | |
366 | success = 0; | |
367 | goto mi_closing; | |
368 | } | |
369 | ||
65f25c66 JRJ |
370 | mi_closing: |
371 | /* Mi closing */ | |
372 | if (lttng_opt_mi) { | |
373 | /* Close sessions and output element element */ | |
374 | ret = mi_lttng_close_multi_element(writer, 2); | |
375 | if (ret) { | |
fd076c09 | 376 | ret = CMD_ERROR; |
b09ee5ba FG |
377 | goto end; |
378 | } | |
fd076c09 | 379 | |
65f25c66 JRJ |
380 | /* Success ? */ |
381 | ret = mi_lttng_writer_write_element_bool(writer, | |
382 | mi_lttng_element_command_success, success); | |
383 | if (ret) { | |
384 | ret = CMD_ERROR; | |
385 | goto end; | |
386 | } | |
f3ed775e | 387 | |
65f25c66 JRJ |
388 | /* Command element close */ |
389 | ret = mi_lttng_writer_command_close(writer); | |
390 | if (ret) { | |
391 | ret = CMD_ERROR; | |
392 | goto end; | |
393 | } | |
394 | } | |
f3ed775e | 395 | end: |
65f25c66 JRJ |
396 | /* Mi clean-up */ |
397 | if (writer && mi_lttng_writer_destroy(writer)) { | |
398 | /* Preserve original error code */ | |
399 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
400 | } | |
401 | ||
fd076c09 | 402 | if (opt_session_name == NULL) { |
b09ee5ba FG |
403 | free(session_name); |
404 | } | |
fd076c09 | 405 | |
65f25c66 JRJ |
406 | /* Overwrite ret if an error occurred during destroy_session/all */ |
407 | ret = command_ret ? command_ret : ret; | |
408 | ||
fd076c09 | 409 | poptFreeContext(pc); |
f3ed775e DG |
410 | return ret; |
411 | } |