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Commit | Line | Data |
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72d0e1cb SG |
1 | /* liblxcapi |
2 | * | |
3 | * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>. | |
4 | * Copyright © 2012 Canonical Ltd. | |
5 | * | |
d75462e4 SH |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | ||
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
72d0e1cb SG |
19 | */ |
20 | ||
9be53773 | 21 | #define _GNU_SOURCE |
0e14584d | 22 | #include <arpa/inet.h> |
38683db4 | 23 | #include <dirent.h> |
9be53773 | 24 | #include <errno.h> |
93dc5327 | 25 | #include <fcntl.h> |
38683db4 | 26 | #include <grp.h> |
f2363e38 | 27 | #include <libgen.h> |
38683db4 CB |
28 | #include <pthread.h> |
29 | #include <sched.h> | |
30 | #include <stdarg.h> | |
d659597e | 31 | #include <stdint.h> |
9fc7f8c0 | 32 | #include <stdio.h> |
56474555 | 33 | #include <sys/file.h> |
38683db4 CB |
34 | #include <sys/mman.h> |
35 | #include <sys/mount.h> | |
5f7eba0b | 36 | #include <sys/syscall.h> |
0e14584d | 37 | #include <sys/sysmacros.h> |
38683db4 CB |
38 | #include <sys/types.h> |
39 | #include <sys/wait.h> | |
0e14584d | 40 | #include <unistd.h> |
f2363e38 | 41 | |
5e5576a4 | 42 | #include "af_unix.h" |
38683db4 | 43 | #include "attach.h" |
38683db4 | 44 | #include "cgroup.h" |
38683db4 | 45 | #include "commands.h" |
92e35018 | 46 | #include "commands_utils.h" |
0e14584d CB |
47 | #include "conf.h" |
48 | #include "config.h" | |
72d0e1cb | 49 | #include "confile.h" |
4222a9f4 | 50 | #include "confile_utils.h" |
e29fe1dd | 51 | #include "criu.h" |
238b3e5e | 52 | #include "error.h" |
a6f151a7 | 53 | #include "initutils.h" |
72d0e1cb | 54 | #include "log.h" |
38683db4 CB |
55 | #include "lxc.h" |
56 | #include "lxccontainer.h" | |
57 | #include "lxclock.h" | |
f2363e38 ÇO |
58 | #include "monitor.h" |
59 | #include "namespace.h" | |
fed29fad | 60 | #include "network.h" |
9994d140 | 61 | #include "parse.h" |
aa460476 | 62 | #include "start.h" |
38683db4 | 63 | #include "state.h" |
28d832c4 CB |
64 | #include "storage.h" |
65 | #include "storage/btrfs.h" | |
66 | #include "storage/overlay.h" | |
0e14584d | 67 | #include "storage_utils.h" |
28d832c4 | 68 | #include "sync.h" |
0ed9b1bc | 69 | #include "terminal.h" |
38683db4 CB |
70 | #include "utils.h" |
71 | #include "version.h" | |
4ba0d9af | 72 | |
af6824fc ST |
73 | /* major()/minor() */ |
74 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 75 | #include <sys/mkdev.h> |
af6824fc | 76 | #endif |
af6824fc | 77 | |
4ba0d9af | 78 | #if HAVE_IFADDRS_H |
9c83a661 | 79 | #include <ifaddrs.h> |
4ba0d9af SG |
80 | #else |
81 | #include <../include/ifaddrs.h> | |
82 | #endif | |
72d0e1cb | 83 | |
684f79a5 SG |
84 | #if IS_BIONIC |
85 | #include <../include/lxcmntent.h> | |
86 | #else | |
87 | #include <mntent.h> | |
88 | #endif | |
89 | ||
5f7eba0b SG |
90 | /* Define faccessat() if missing from the C library */ |
91 | #ifndef HAVE_FACCESSAT | |
92 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
93 | { | |
94 | #ifdef __NR_faccessat | |
238b3e5e | 95 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 96 | #else |
238b3e5e CB |
97 | errno = ENOSYS; |
98 | return -1; | |
5f7eba0b SG |
99 | #endif |
100 | } | |
101 | #endif | |
102 | ||
72d0e1cb SG |
103 | lxc_log_define(lxc_container, lxc); |
104 | ||
858377e4 SH |
105 | static bool do_lxcapi_destroy(struct lxc_container *c); |
106 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
107 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
108 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
109 | static bool container_destroy(struct lxc_container *c, |
110 | struct lxc_storage *storage); | |
858377e4 SH |
111 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
112 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
113 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
114 | ||
a41f104b SH |
115 | static bool config_file_exists(const char *lxcpath, const char *cname) |
116 | { | |
ef1ab8f1 CB |
117 | int ret; |
118 | size_t len; | |
119 | char *fname; | |
a41f104b | 120 | |
ef1ab8f1 CB |
121 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
122 | len = strlen(lxcpath) + strlen(cname) + 9; | |
123 | fname = alloca(len); | |
124 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); | |
125 | if (ret < 0 || (size_t)ret >= len) | |
a41f104b SH |
126 | return false; |
127 | ||
128 | return file_exists(fname); | |
129 | } | |
130 | ||
444249ea CB |
131 | /* A few functions to help detect when a container creation failed. If a |
132 | * container creation was killed partway through, then trying to actually start | |
133 | * that container could harm the host. We detect this by creating a 'partial' | |
134 | * file under the container directory, and keeping an advisory lock. When | |
135 | * container creation completes, we remove that file. When we load or try to | |
136 | * start a container, if we find that file, without a flock, we remove the | |
137 | * container. | |
3e625e2d | 138 | */ |
74a3920a | 139 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 140 | { |
3e625e2d | 141 | int fd, ret; |
444249ea CB |
142 | size_t len; |
143 | char *path; | |
56474555 | 144 | struct flock lk = {0}; |
93dc5327 | 145 | |
444249ea CB |
146 | len = strlen(c->config_path) + strlen(c->name) + 10; |
147 | path = alloca(len); | |
3e625e2d | 148 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
444249ea | 149 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 150 | return -1; |
3e625e2d SH |
151 | |
152 | if (!file_exists(path)) | |
153 | return 0; | |
444249ea | 154 | |
025ed0f3 | 155 | fd = open(path, O_RDWR); |
444249ea | 156 | if (fd < 0) |
3e625e2d | 157 | return 0; |
444249ea | 158 | |
93dc5327 SH |
159 | lk.l_type = F_WRLCK; |
160 | lk.l_whence = SEEK_SET; | |
93dc5327 | 161 | lk.l_pid = -1; |
444249ea | 162 | |
56474555 CB |
163 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
164 | if (ret < 0 && errno == EINVAL) | |
165 | ret = flock(fd, LOCK_EX | LOCK_NB); | |
444249ea CB |
166 | close(fd); |
167 | if (ret == 0 && lk.l_pid != -1) { | |
1a0e70ac | 168 | /* create is still ongoing */ |
3e625e2d SH |
169 | return 1; |
170 | } | |
444249ea CB |
171 | |
172 | /* Create completed but partial is still there. */ | |
3e625e2d SH |
173 | return 2; |
174 | } | |
175 | ||
74a3920a | 176 | static int create_partial(struct lxc_container *c) |
3e625e2d | 177 | { |
3e625e2d | 178 | int fd, ret; |
f5cd0252 CB |
179 | size_t len; |
180 | char *path; | |
56474555 | 181 | struct flock lk = {0}; |
93dc5327 | 182 | |
f5cd0252 CB |
183 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
184 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
185 | path = alloca(len); | |
3e625e2d | 186 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
f5cd0252 | 187 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 188 | return -1; |
f5cd0252 CB |
189 | |
190 | fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0755); | |
191 | if (fd < 0) | |
3e625e2d | 192 | return -1; |
f5cd0252 | 193 | |
93dc5327 SH |
194 | lk.l_type = F_WRLCK; |
195 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 196 | |
56474555 | 197 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 198 | if (ret < 0) { |
56474555 CB |
199 | if (errno == EINVAL) { |
200 | ret = flock(fd, LOCK_EX); | |
201 | if (ret == 0) | |
202 | return fd; | |
203 | } | |
204 | ||
f5cd0252 | 205 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 206 | close(fd); |
3e625e2d SH |
207 | return -1; |
208 | } | |
3e625e2d SH |
209 | |
210 | return fd; | |
211 | } | |
212 | ||
74a3920a | 213 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 214 | { |
3e625e2d | 215 | int ret; |
a3740e80 CB |
216 | size_t len; |
217 | char *path; | |
3e625e2d SH |
218 | |
219 | close(fd); | |
a3740e80 CB |
220 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
221 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
222 | path = alloca(len); | |
3e625e2d | 223 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
a3740e80 | 224 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 225 | return; |
a3740e80 CB |
226 | |
227 | ret = unlink(path); | |
228 | if (ret < 0) | |
229 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
230 | } |
231 | ||
72d0e1cb | 232 | /* LOCKING |
3bc449ed SH |
233 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
234 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
235 | * container configuration file. | |
236 | * The container_disk_lock also takes the container_mem_lock. | |
237 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
238 | * NOTHING mutexes two independent programs with their own struct |
239 | * lxc_container for the same c->name, between API calls. For instance, | |
240 | * c->config_read(); c->start(); Between those calls, data on disk | |
241 | * could change (which shouldn't bother the caller unless for instance | |
242 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
243 | * Two such updaters could race. The callers should therefore check their | |
244 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
245 | * due to hung callers. So I prefer to keep the locks only within our own | |
246 | * functions, not across functions. | |
247 | * | |
3bc449ed | 248 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
249 | * c->numthreads (under privlock) before forking. When deleting, |
250 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
251 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
252 | */ | |
253 | ||
254 | static void lxc_container_free(struct lxc_container *c) | |
255 | { | |
256 | if (!c) | |
257 | return; | |
258 | ||
f10fad2f ME |
259 | free(c->configfile); |
260 | c->configfile = NULL; | |
70849dc2 | 261 | |
f10fad2f ME |
262 | free(c->error_string); |
263 | c->error_string = NULL; | |
70849dc2 | 264 | |
d95db067 | 265 | if (c->slock) { |
df271a59 | 266 | lxc_putlock(c->slock); |
d95db067 DE |
267 | c->slock = NULL; |
268 | } | |
70849dc2 | 269 | |
72d0e1cb | 270 | if (c->privlock) { |
df271a59 | 271 | lxc_putlock(c->privlock); |
72d0e1cb SG |
272 | c->privlock = NULL; |
273 | } | |
70849dc2 | 274 | |
f10fad2f ME |
275 | free(c->name); |
276 | c->name = NULL; | |
70849dc2 | 277 | |
d95db067 DE |
278 | if (c->lxc_conf) { |
279 | lxc_conf_free(c->lxc_conf); | |
280 | c->lxc_conf = NULL; | |
281 | } | |
70849dc2 | 282 | |
f10fad2f ME |
283 | free(c->config_path); |
284 | c->config_path = NULL; | |
72cf75fa | 285 | |
72d0e1cb SG |
286 | free(c); |
287 | } | |
288 | ||
045552aa CB |
289 | /* Consider the following case: |
290 | * | |
291 | * |====================================================================| | |
292 | * | freer | racing get()er | | |
293 | * |====================================================================| | |
294 | * | lxc_container_put() | lxc_container_get() | | |
295 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
296 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
297 | * | \ lxcunlock() | \ | | |
298 | * | \ lxc_container_free() | \ lxclock() returns | | |
299 | * | | \ c->numthreads < 1 -> return 0 | | |
300 | * | \ \ (free stuff) | | | |
301 | * | \ \ sem_destroy(privlock) | | | |
302 | * |_______________________________|____________________________________| | |
303 | * | |
43d1aa34 SH |
304 | * When the get()er checks numthreads the first time, one of the following |
305 | * is true: | |
306 | * 1. freer has set numthreads = 0. get() returns 0 | |
307 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
308 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
309 | * numthreads is 0 and exit without touching lxclock again.. | |
310 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
311 | * will see --numthreads = 1 and not call lxc_container_free(). | |
312 | */ | |
313 | ||
72d0e1cb SG |
314 | int lxc_container_get(struct lxc_container *c) |
315 | { | |
316 | if (!c) | |
317 | return 0; | |
318 | ||
1a0e70ac CB |
319 | /* If someone else has already started freeing the container, don't try |
320 | * to take the lock, which may be invalid. | |
321 | */ | |
43d1aa34 SH |
322 | if (c->numthreads < 1) |
323 | return 0; | |
324 | ||
5cee8c50 | 325 | if (container_mem_lock(c)) |
72d0e1cb | 326 | return 0; |
1a0e70ac CB |
327 | |
328 | /* Bail without trying to unlock, bc the privlock is now probably in | |
329 | * freed memory. | |
330 | */ | |
331 | if (c->numthreads < 1) | |
72d0e1cb | 332 | return 0; |
1a0e70ac | 333 | |
72d0e1cb | 334 | c->numthreads++; |
5cee8c50 | 335 | container_mem_unlock(c); |
045552aa | 336 | |
72d0e1cb SG |
337 | return 1; |
338 | } | |
339 | ||
340 | int lxc_container_put(struct lxc_container *c) | |
341 | { | |
342 | if (!c) | |
343 | return -1; | |
045552aa | 344 | |
5cee8c50 | 345 | if (container_mem_lock(c)) |
72d0e1cb | 346 | return -1; |
045552aa | 347 | |
44619b6c CB |
348 | c->numthreads--; |
349 | ||
350 | if (c->numthreads < 1) { | |
5cee8c50 | 351 | container_mem_unlock(c); |
72d0e1cb SG |
352 | lxc_container_free(c); |
353 | return 1; | |
354 | } | |
045552aa | 355 | |
5cee8c50 | 356 | container_mem_unlock(c); |
045552aa | 357 | |
72d0e1cb SG |
358 | return 0; |
359 | } | |
360 | ||
858377e4 | 361 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 362 | { |
428ad142 | 363 | int statret; |
72d0e1cb SG |
364 | struct stat statbuf; |
365 | bool ret = false; | |
72d0e1cb SG |
366 | |
367 | if (!c) | |
368 | return false; | |
369 | ||
5cee8c50 | 370 | if (container_mem_lock(c)) |
72d0e1cb | 371 | return false; |
428ad142 | 372 | |
72d0e1cb | 373 | if (!c->configfile) |
428ad142 CB |
374 | goto on_error; |
375 | ||
72d0e1cb SG |
376 | statret = stat(c->configfile, &statbuf); |
377 | if (statret != 0) | |
428ad142 CB |
378 | goto on_error; |
379 | ||
72d0e1cb SG |
380 | ret = true; |
381 | ||
428ad142 | 382 | on_error: |
5cee8c50 | 383 | container_mem_unlock(c); |
428ad142 | 384 | |
72d0e1cb SG |
385 | return ret; |
386 | } | |
387 | ||
858377e4 SH |
388 | #define WRAP_API(rettype, fnname) \ |
389 | static rettype fnname(struct lxc_container *c) \ | |
390 | { \ | |
391 | rettype ret; \ | |
8164f0e2 TA |
392 | bool reset_config = false; \ |
393 | \ | |
394 | if (!current_config && c && c->lxc_conf) { \ | |
395 | current_config = c->lxc_conf; \ | |
396 | reset_config = true; \ | |
397 | } \ | |
398 | \ | |
858377e4 | 399 | ret = do_##fnname(c); \ |
8164f0e2 TA |
400 | if (reset_config) \ |
401 | current_config = NULL; \ | |
402 | \ | |
858377e4 SH |
403 | return ret; \ |
404 | } | |
405 | ||
406 | #define WRAP_API_1(rettype, fnname, t1) \ | |
407 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
408 | { \ | |
409 | rettype ret; \ | |
8164f0e2 TA |
410 | bool reset_config = false; \ |
411 | \ | |
412 | if (!current_config && c && c->lxc_conf) { \ | |
413 | current_config = c->lxc_conf; \ | |
414 | reset_config = true; \ | |
415 | } \ | |
416 | \ | |
858377e4 | 417 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
418 | if (reset_config) \ |
419 | current_config = NULL; \ | |
420 | \ | |
858377e4 SH |
421 | return ret; \ |
422 | } | |
423 | ||
424 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
425 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
426 | { \ | |
427 | rettype ret; \ | |
8164f0e2 TA |
428 | bool reset_config = false; \ |
429 | \ | |
430 | if (!current_config && c && c->lxc_conf) { \ | |
431 | current_config = c->lxc_conf; \ | |
432 | reset_config = true; \ | |
433 | } \ | |
434 | \ | |
858377e4 | 435 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
436 | if (reset_config) \ |
437 | current_config = NULL; \ | |
438 | \ | |
858377e4 SH |
439 | return ret; \ |
440 | } | |
441 | ||
442 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
443 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
444 | { \ | |
445 | rettype ret; \ | |
8164f0e2 TA |
446 | bool reset_config = false; \ |
447 | \ | |
448 | if (!current_config && c && c->lxc_conf) { \ | |
449 | current_config = c->lxc_conf; \ | |
450 | reset_config = true; \ | |
451 | } \ | |
452 | \ | |
858377e4 | 453 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
454 | if (reset_config) \ |
455 | current_config = NULL; \ | |
456 | \ | |
858377e4 SH |
457 | return ret; \ |
458 | } | |
459 | ||
460 | WRAP_API(bool, lxcapi_is_defined) | |
461 | ||
462 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 463 | { |
72d0e1cb SG |
464 | lxc_state_t s; |
465 | ||
466 | if (!c) | |
467 | return NULL; | |
b547d79f | 468 | |
13f5be62 | 469 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 470 | return lxc_state2str(s); |
72d0e1cb SG |
471 | } |
472 | ||
858377e4 SH |
473 | WRAP_API(const char *, lxcapi_state) |
474 | ||
39dc698c | 475 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
476 | { |
477 | lxc_state_t s; | |
5bddcb62 | 478 | |
13f5be62 | 479 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
480 | return (s == STOPPED); |
481 | } | |
482 | ||
858377e4 | 483 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 484 | { |
72d0e1cb SG |
485 | if (!c) |
486 | return false; | |
1b61062f | 487 | |
9e630418 | 488 | return !is_stopped(c); |
72d0e1cb SG |
489 | } |
490 | ||
858377e4 SH |
491 | WRAP_API(bool, lxcapi_is_running) |
492 | ||
493 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb SG |
494 | { |
495 | int ret; | |
8787b387 | 496 | |
72d0e1cb SG |
497 | if (!c) |
498 | return false; | |
499 | ||
9123e471 | 500 | ret = lxc_freeze(c->name, c->config_path); |
5df46fad | 501 | if (ret < 0) |
72d0e1cb | 502 | return false; |
8787b387 | 503 | |
72d0e1cb SG |
504 | return true; |
505 | } | |
506 | ||
858377e4 SH |
507 | WRAP_API(bool, lxcapi_freeze) |
508 | ||
509 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb SG |
510 | { |
511 | int ret; | |
8e59e0ba | 512 | |
72d0e1cb SG |
513 | if (!c) |
514 | return false; | |
515 | ||
9123e471 | 516 | ret = lxc_unfreeze(c->name, c->config_path); |
e8989473 | 517 | if (ret < 0) |
72d0e1cb | 518 | return false; |
8e59e0ba | 519 | |
72d0e1cb SG |
520 | return true; |
521 | } | |
522 | ||
858377e4 SH |
523 | WRAP_API(bool, lxcapi_unfreeze) |
524 | ||
525 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 526 | { |
0115f8fd DE |
527 | if (!c) |
528 | return -1; | |
529 | ||
c86e2584 | 530 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
531 | } |
532 | ||
858377e4 SH |
533 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
534 | ||
b5159817 DE |
535 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
536 | int stdoutfd, int stderrfd, int escape) | |
537 | { | |
858377e4 SH |
538 | int ret; |
539 | ||
540 | if (!c) | |
541 | return -1; | |
542 | ||
543 | current_config = c->lxc_conf; | |
544 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
545 | current_config = NULL; | |
49cfedb3 | 546 | |
858377e4 | 547 | return ret; |
b5159817 DE |
548 | } |
549 | ||
191d43cc CB |
550 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
551 | { | |
552 | int ret; | |
553 | ||
554 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); | |
555 | if (ret < 0) { | |
556 | if (ret == -ENODATA) | |
63b74cda | 557 | NOTICE("The console log is empty"); |
191d43cc | 558 | else if (ret == -EFAULT) |
63b74cda CB |
559 | NOTICE("The container does not keep a console log"); |
560 | else if (ret == -ENOENT) | |
561 | NOTICE("The container does not keep a console log file"); | |
562 | else if (ret == -EIO) | |
563 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 564 | else |
63b74cda | 565 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
566 | } |
567 | ||
568 | return ret; | |
569 | } | |
570 | ||
571 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
572 | ||
858377e4 | 573 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 574 | { |
72d0e1cb SG |
575 | if (!c) |
576 | return -1; | |
577 | ||
5cee8c50 | 578 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
579 | } |
580 | ||
858377e4 SH |
581 | WRAP_API(pid_t, lxcapi_init_pid) |
582 | ||
12a50cc6 | 583 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
584 | { |
585 | if (!c->lxc_conf) | |
586 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 587 | |
6b0d5538 SH |
588 | if (!c->lxc_conf) |
589 | return false; | |
e3246ab9 | 590 | |
d08779d4 SH |
591 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
592 | return false; | |
e3246ab9 | 593 | |
d08779d4 | 594 | return true; |
8eb5694b SH |
595 | } |
596 | ||
858377e4 | 597 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 598 | { |
39dc698c | 599 | int lret; |
12a50cc6 | 600 | const char *fname; |
d03ab308 CB |
601 | bool need_disklock = false, ret = false; |
602 | ||
72d0e1cb SG |
603 | if (!c) |
604 | return false; | |
605 | ||
606 | fname = c->configfile; | |
607 | if (alt_file) | |
608 | fname = alt_file; | |
609 | if (!fname) | |
610 | return false; | |
d03ab308 CB |
611 | |
612 | /* If we're reading something other than the container's config, we only | |
613 | * need to lock the in-memory container. If loading the container's | |
614 | * config file, take the disk lock. | |
39dc698c SH |
615 | */ |
616 | if (strcmp(fname, c->configfile) == 0) | |
617 | need_disklock = true; | |
618 | ||
619 | if (need_disklock) | |
620 | lret = container_disk_lock(c); | |
621 | else | |
622 | lret = container_mem_lock(c); | |
623 | if (lret) | |
72d0e1cb | 624 | return false; |
39dc698c | 625 | |
8eb5694b | 626 | ret = load_config_locked(c, fname); |
39dc698c SH |
627 | |
628 | if (need_disklock) | |
629 | container_disk_unlock(c); | |
630 | else | |
631 | container_mem_unlock(c); | |
d03ab308 | 632 | |
72d0e1cb SG |
633 | return ret; |
634 | } | |
635 | ||
858377e4 SH |
636 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
637 | ||
638 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 639 | { |
497a2995 | 640 | if (!c || !c->lxc_conf) |
540f932a | 641 | return false; |
fb5999f6 CB |
642 | |
643 | if (container_mem_lock(c)) | |
540f932a | 644 | return false; |
fb5999f6 | 645 | |
a2739df5 | 646 | c->daemonize = state; |
d630991d | 647 | |
3bc449ed | 648 | container_mem_unlock(c); |
fb5999f6 | 649 | |
540f932a | 650 | return true; |
72d0e1cb SG |
651 | } |
652 | ||
858377e4 SH |
653 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
654 | ||
655 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
656 | { |
657 | if (!c || !c->lxc_conf) | |
49badbbe | 658 | return false; |
871ed23b CB |
659 | |
660 | if (container_mem_lock(c)) | |
49badbbe | 661 | return false; |
871ed23b | 662 | |
540f932a | 663 | c->lxc_conf->close_all_fds = state; |
d630991d | 664 | |
130a1888 | 665 | container_mem_unlock(c); |
871ed23b | 666 | |
49badbbe | 667 | return true; |
130a1888 ÇO |
668 | } |
669 | ||
858377e4 SH |
670 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
671 | ||
e202dfb8 CB |
672 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
673 | int timeout) | |
7a44c8b4 SG |
674 | { |
675 | int ret; | |
676 | ||
677 | if (!c) | |
678 | return false; | |
679 | ||
67e571de | 680 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
681 | return ret == 0; |
682 | } | |
683 | ||
858377e4 | 684 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 685 | |
2d834aa8 SH |
686 | static bool am_single_threaded(void) |
687 | { | |
2d834aa8 | 688 | DIR *dir; |
d630991d | 689 | struct dirent *direntp; |
6b0297e3 | 690 | int count = 0; |
2d834aa8 | 691 | |
2d834aa8 | 692 | dir = opendir("/proc/self/task"); |
6b0297e3 | 693 | if (!dir) |
2d834aa8 | 694 | return false; |
2d834aa8 | 695 | |
74f96976 | 696 | while ((direntp = readdir(dir))) { |
d630991d | 697 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
698 | continue; |
699 | ||
d630991d | 700 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 701 | continue; |
6b0297e3 | 702 | |
d630991d CB |
703 | count++; |
704 | if (count > 1) | |
2d834aa8 SH |
705 | break; |
706 | } | |
2d834aa8 | 707 | closedir(dir); |
6b0297e3 | 708 | |
2d834aa8 SH |
709 | return count == 1; |
710 | } | |
711 | ||
fd51a89b SH |
712 | static void push_arg(char ***argp, char *arg, int *nargs) |
713 | { | |
fd51a89b | 714 | char *copy; |
1452d3fe | 715 | char **argv; |
fd51a89b | 716 | |
d630991d | 717 | copy = must_copy_string(arg); |
1452d3fe | 718 | |
fd51a89b SH |
719 | do { |
720 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
721 | } while (!argv); | |
1452d3fe | 722 | |
fd51a89b SH |
723 | *argp = argv; |
724 | argv[*nargs] = copy; | |
725 | (*nargs)++; | |
726 | argv[*nargs] = NULL; | |
727 | } | |
728 | ||
729 | static char **split_init_cmd(const char *incmd) | |
730 | { | |
731 | size_t len; | |
75bd13ab | 732 | char *copy, *p; |
fd51a89b | 733 | char **argv; |
75bd13ab CB |
734 | int nargs = 0; |
735 | char *saveptr = NULL; | |
fd51a89b SH |
736 | |
737 | if (!incmd) | |
738 | return NULL; | |
739 | ||
740 | len = strlen(incmd) + 1; | |
741 | copy = alloca(len); | |
742 | strncpy(copy, incmd, len); | |
75bd13ab | 743 | copy[len - 1] = '\0'; |
fd51a89b SH |
744 | |
745 | do { | |
746 | argv = malloc(sizeof(char *)); | |
747 | } while (!argv); | |
75bd13ab | 748 | |
fd51a89b | 749 | argv[0] = NULL; |
75bd13ab | 750 | for (; (p = strtok_r(copy, " ", &saveptr)); copy = NULL) |
fd51a89b SH |
751 | push_arg(&argv, p, &nargs); |
752 | ||
753 | if (nargs == 0) { | |
754 | free(argv); | |
755 | return NULL; | |
756 | } | |
75bd13ab | 757 | |
fd51a89b SH |
758 | return argv; |
759 | } | |
760 | ||
761 | static void free_init_cmd(char **argv) | |
762 | { | |
763 | int i = 0; | |
764 | ||
765 | if (!argv) | |
766 | return; | |
702bf732 | 767 | |
fd51a89b SH |
768 | while (argv[i]) |
769 | free(argv[i++]); | |
702bf732 | 770 | |
fd51a89b SH |
771 | free(argv); |
772 | } | |
773 | ||
5e5576a4 CB |
774 | static int lxc_rcv_status(int state_socket) |
775 | { | |
776 | int ret; | |
ee8377bd | 777 | int state = -1; |
5e5576a4 | 778 | |
ee8377bd | 779 | again: |
5e5576a4 CB |
780 | /* Receive container state. */ |
781 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, | |
ee8377bd CB |
782 | sizeof(int)); |
783 | if (ret <= 0) { | |
784 | if (errno != EINTR) | |
785 | return -1; | |
786 | TRACE("Caught EINTR; retrying"); | |
787 | goto again; | |
788 | } | |
5e5576a4 CB |
789 | |
790 | return state; | |
791 | } | |
792 | ||
793 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
794 | { | |
01c1b11e | 795 | int ret, state; |
5e5576a4 CB |
796 | |
797 | /* Close write end of the socket pair. */ | |
798 | close(handler->state_socket_pair[1]); | |
799 | handler->state_socket_pair[1] = -1; | |
800 | ||
801 | state = lxc_rcv_status(handler->state_socket_pair[0]); | |
802 | ||
803 | /* Close read end of the socket pair. */ | |
804 | close(handler->state_socket_pair[0]); | |
805 | handler->state_socket_pair[0] = -1; | |
806 | ||
807 | /* The first child is going to fork() again and then exits. So we reap | |
808 | * the first child here. | |
809 | */ | |
01c1b11e CB |
810 | ret = wait_for_pid(pid); |
811 | if (ret < 0) | |
812 | DEBUG("Failed waiting on first child %d", pid); | |
813 | else | |
814 | DEBUG("First child %d exited", pid); | |
5e5576a4 CB |
815 | |
816 | if (state < 0) { | |
817 | SYSERROR("Failed to receive the container state"); | |
818 | return false; | |
819 | } | |
820 | ||
821 | /* If we receive anything else then running we know that the container | |
822 | * failed to start. | |
823 | */ | |
824 | if (state != RUNNING) { | |
825 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
826 | lxc_state2str(state)); | |
827 | return false; | |
828 | } | |
829 | ||
830 | TRACE("Container is in \"RUNNING\" state"); | |
831 | return true; | |
832 | } | |
833 | ||
858377e4 | 834 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
835 | { |
836 | int ret; | |
aa460476 | 837 | struct lxc_handler *handler; |
72d0e1cb | 838 | struct lxc_conf *conf; |
72d0e1cb SG |
839 | char *default_args[] = { |
840 | "/sbin/init", | |
13aad0ae | 841 | NULL, |
72d0e1cb | 842 | }; |
fd51a89b | 843 | char **init_cmd = NULL; |
c1a3e547 | 844 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 845 | |
7cb19d44 | 846 | /* container does exist */ |
72d0e1cb SG |
847 | if (!c) |
848 | return false; | |
120146b9 | 849 | |
7cb19d44 CB |
850 | /* If anything fails before we set error_num, we want an error in there. |
851 | */ | |
120146b9 SG |
852 | c->error_num = 1; |
853 | ||
7cb19d44 | 854 | /* Container has not been setup. */ |
72d0e1cb SG |
855 | if (!c->lxc_conf) |
856 | return false; | |
857 | ||
c47eafec CB |
858 | ret = ongoing_create(c); |
859 | if (ret < 0) { | |
7cb19d44 | 860 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 861 | return false; |
3e625e2d | 862 | } else if (ret == 1) { |
7cb19d44 | 863 | ERROR("Ongoing container creation detected"); |
3e625e2d | 864 | return false; |
c47eafec | 865 | } else if (ret == 2) { |
7cb19d44 | 866 | ERROR("Failed to create container"); |
c47eafec CB |
867 | do_lxcapi_destroy(c); |
868 | return false; | |
3e625e2d SH |
869 | } |
870 | ||
5cee8c50 | 871 | if (container_mem_lock(c)) |
72d0e1cb | 872 | return false; |
d630991d | 873 | |
72d0e1cb | 874 | conf = c->lxc_conf; |
72d0e1cb | 875 | |
aa460476 | 876 | /* initialize handler */ |
9640c6a7 | 877 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 878 | |
dbc9832d | 879 | container_mem_unlock(c); |
aa460476 CB |
880 | if (!handler) |
881 | return false; | |
882 | ||
fa30091b CB |
883 | if (!argv) { |
884 | if (useinit && conf->execute_cmd) | |
885 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
886 | else | |
887 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
888 | } | |
fd51a89b | 889 | |
7cb19d44 | 890 | /* ... otherwise use default_args. */ |
fa30091b | 891 | if (!argv) { |
e1e76423 CB |
892 | if (useinit) { |
893 | ERROR("No valid init detected"); | |
894 | lxc_free_handler(handler); | |
fa30091b | 895 | return false; |
e1e76423 CB |
896 | } |
897 | argv = default_args; | |
fa30091b | 898 | } |
72d0e1cb | 899 | |
7cb19d44 CB |
900 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
901 | * here to protect the on disk container? We don't want to exclude | |
902 | * things like lxc_info while the container is running. | |
903 | */ | |
9640c6a7 | 904 | if (c->daemonize) { |
a6b6ad7b | 905 | bool started; |
0a4be28d | 906 | char title[2048]; |
c47eafec | 907 | pid_t pid; |
71454076 | 908 | |
c47eafec | 909 | pid = fork(); |
f2e07cb6 | 910 | if (pid < 0) { |
c47eafec | 911 | free_init_cmd(init_cmd); |
f2e07cb6 | 912 | lxc_free_handler(handler); |
72d0e1cb | 913 | return false; |
f2e07cb6 | 914 | } |
6eaac303 | 915 | |
7cb19d44 | 916 | /* first parent */ |
6eaac303 QH |
917 | if (pid != 0) { |
918 | /* Set to NULL because we don't want father unlink | |
919 | * the PID file, child will do the free and unlink. | |
920 | */ | |
921 | c->pidfile = NULL; | |
5e5576a4 | 922 | |
7cb19d44 CB |
923 | /* Wait for container to tell us whether it started |
924 | * successfully. | |
925 | */ | |
a6b6ad7b CB |
926 | started = wait_on_daemonized_start(handler, pid); |
927 | ||
928 | free_init_cmd(init_cmd); | |
929 | lxc_free_handler(handler); | |
930 | return started; | |
6eaac303 | 931 | } |
025ed0f3 | 932 | |
7cb19d44 CB |
933 | /* first child */ |
934 | ||
0a4be28d | 935 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
936 | * characters. All that it means is that the proctitle will be |
937 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
938 | * */ | |
d630991d | 939 | (void)snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); |
0a4be28d | 940 | INFO("Attempting to set proc title to %s", title); |
d630991d | 941 | (void)setproctitle(title); |
0a4be28d | 942 | |
7cb19d44 CB |
943 | /* We fork() a second time to be reparented to init. Like |
944 | * POSIX's daemon() function we change to "/" and redirect | |
945 | * std{in,out,err} to /dev/null. | |
946 | */ | |
697fa639 SH |
947 | pid = fork(); |
948 | if (pid < 0) { | |
7cb19d44 | 949 | SYSERROR("Failed to fork first child process"); |
d608fbda | 950 | _exit(EXIT_FAILURE); |
697fa639 | 951 | } |
a6b6ad7b | 952 | |
7cb19d44 | 953 | /* second parent */ |
a6b6ad7b CB |
954 | if (pid != 0) { |
955 | free_init_cmd(init_cmd); | |
956 | lxc_free_handler(handler); | |
d608fbda | 957 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
958 | } |
959 | ||
7cb19d44 CB |
960 | /* second child */ |
961 | ||
962 | /* change to / directory */ | |
963 | ret = chdir("/"); | |
964 | if (ret < 0) { | |
965 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 966 | _exit(EXIT_FAILURE); |
c278cef2 | 967 | } |
7cb19d44 | 968 | |
c1a3e547 CB |
969 | keepfds[0] = handler->conf->maincmd_fd; |
970 | keepfds[1] = handler->state_socket_pair[0]; | |
971 | keepfds[2] = handler->state_socket_pair[1]; | |
972 | ret = lxc_check_inherited(conf, true, keepfds, | |
973 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 974 | if (ret < 0) |
d608fbda | 975 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
976 | |
977 | /* redirect std{in,out,err} to /dev/null */ | |
978 | ret = null_stdfds(); | |
979 | if (ret < 0) { | |
980 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 981 | _exit(EXIT_FAILURE); |
69aeabac | 982 | } |
7cb19d44 CB |
983 | |
984 | /* become session leader */ | |
985 | ret = setsid(); | |
986 | if (ret < 0) | |
0059379f | 987 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
2d834aa8 SH |
988 | } else { |
989 | if (!am_single_threaded()) { | |
990 | ERROR("Cannot start non-daemonized container when threaded"); | |
a6b6ad7b | 991 | free_init_cmd(init_cmd); |
f2e07cb6 | 992 | lxc_free_handler(handler); |
2d834aa8 SH |
993 | return false; |
994 | } | |
72d0e1cb SG |
995 | } |
996 | ||
aa460476 | 997 | /* We need to write PID file after daemonize, so we always |
6eaac303 QH |
998 | * write the right PID. |
999 | */ | |
1000 | if (c->pidfile) { | |
7cea5905 CB |
1001 | int ret, w; |
1002 | char pidstr[LXC_NUMSTRLEN64]; | |
1003 | ||
1004 | w = snprintf(pidstr, LXC_NUMSTRLEN64, "%d", (int)lxc_raw_getpid()); | |
1005 | if (w < 0 || (size_t)w >= LXC_NUMSTRLEN64) { | |
c47eafec | 1006 | free_init_cmd(init_cmd); |
f2e07cb6 | 1007 | lxc_free_handler(handler); |
7cea5905 CB |
1008 | |
1009 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1010 | ||
9640c6a7 | 1011 | if (c->daemonize) |
d608fbda | 1012 | _exit(EXIT_FAILURE); |
7cea5905 | 1013 | |
6eaac303 QH |
1014 | return false; |
1015 | } | |
1016 | ||
7cea5905 CB |
1017 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1018 | if (ret < 0) { | |
c47eafec | 1019 | free_init_cmd(init_cmd); |
f2e07cb6 | 1020 | lxc_free_handler(handler); |
7cea5905 CB |
1021 | |
1022 | SYSERROR("Failed to write '%s'", c->pidfile); | |
1023 | ||
9640c6a7 | 1024 | if (c->daemonize) |
d608fbda | 1025 | _exit(EXIT_FAILURE); |
7cea5905 | 1026 | |
6eaac303 QH |
1027 | return false; |
1028 | } | |
6eaac303 QH |
1029 | } |
1030 | ||
72d0e1cb | 1031 | conf->reboot = 0; |
d2cf4c37 | 1032 | |
a8dfe4e0 WB |
1033 | /* Unshare the mount namespace if requested */ |
1034 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1035 | ret = unshare(CLONE_NEWNS); |
1036 | if (ret < 0) { | |
a8dfe4e0 | 1037 | SYSERROR("failed to unshare mount namespace"); |
f2e07cb6 | 1038 | lxc_free_handler(handler); |
a6b6ad7b | 1039 | ret = 1; |
7cb19d44 | 1040 | goto on_error; |
a8dfe4e0 | 1041 | } |
7cb19d44 CB |
1042 | |
1043 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1044 | if (ret < 0) { | |
a8dfe4e0 | 1045 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1046 | lxc_free_handler(handler); |
a6b6ad7b | 1047 | ret = 1; |
7cb19d44 | 1048 | goto on_error; |
a8dfe4e0 WB |
1049 | } |
1050 | } | |
1051 | ||
8bee8851 | 1052 | reboot: |
aa460476 CB |
1053 | if (conf->reboot == 2) { |
1054 | /* initialize handler */ | |
9640c6a7 | 1055 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1056 | if (!handler) { |
1057 | ret = 1; | |
7cb19d44 | 1058 | goto on_error; |
a6b6ad7b | 1059 | } |
aa460476 CB |
1060 | } |
1061 | ||
c1a3e547 CB |
1062 | keepfds[0] = handler->conf->maincmd_fd; |
1063 | keepfds[1] = handler->state_socket_pair[0]; | |
1064 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1065 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1066 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1067 | if (ret < 0) { |
f2e07cb6 | 1068 | lxc_free_handler(handler); |
d2cf4c37 | 1069 | ret = 1; |
7cb19d44 | 1070 | goto on_error; |
d2cf4c37 SH |
1071 | } |
1072 | ||
9605460f | 1073 | if (useinit) |
9640c6a7 CB |
1074 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1075 | c->daemonize, &c->error_num); | |
9605460f | 1076 | else |
9640c6a7 CB |
1077 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1078 | c->daemonize, &c->error_num); | |
72d0e1cb | 1079 | |
8bee8851 | 1080 | if (conf->reboot == 1) { |
7cb19d44 | 1081 | INFO("Container requested reboot"); |
8bee8851 | 1082 | conf->reboot = 2; |
72d0e1cb SG |
1083 | goto reboot; |
1084 | } | |
1085 | ||
7cb19d44 | 1086 | on_error: |
487d8008 QH |
1087 | if (c->pidfile) { |
1088 | unlink(c->pidfile); | |
1089 | free(c->pidfile); | |
1090 | c->pidfile = NULL; | |
1091 | } | |
fd51a89b SH |
1092 | free_init_cmd(init_cmd); |
1093 | ||
9640c6a7 | 1094 | if (c->daemonize && ret != 0) |
d608fbda | 1095 | _exit(EXIT_FAILURE); |
9640c6a7 | 1096 | else if (c->daemonize) |
d608fbda | 1097 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1098 | |
1099 | if (ret != 0) | |
1100 | return false; | |
1101 | ||
1102 | return true; | |
72d0e1cb SG |
1103 | } |
1104 | ||
0c14779f CB |
1105 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1106 | char *const argv[]) | |
858377e4 SH |
1107 | { |
1108 | bool ret; | |
0c14779f | 1109 | |
858377e4 SH |
1110 | current_config = c ? c->lxc_conf : NULL; |
1111 | ret = do_lxcapi_start(c, useinit, argv); | |
1112 | current_config = NULL; | |
0c14779f | 1113 | |
858377e4 SH |
1114 | return ret; |
1115 | } | |
1116 | ||
9f52e331 | 1117 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1118 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1119 | { | |
1120 | va_list ap; | |
a0e93eeb | 1121 | char **inargs = NULL; |
72d0e1cb SG |
1122 | bool bret = false; |
1123 | ||
1124 | /* container exists */ | |
1125 | if (!c) | |
1126 | return false; | |
1127 | ||
858377e4 SH |
1128 | current_config = c->lxc_conf; |
1129 | ||
72d0e1cb | 1130 | va_start(ap, useinit); |
a0e93eeb | 1131 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1132 | va_end(ap); |
9f52e331 CB |
1133 | if (!inargs) |
1134 | goto on_error; | |
72d0e1cb | 1135 | |
a0e93eeb | 1136 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1137 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1138 | |
9f52e331 | 1139 | on_error: |
72d0e1cb | 1140 | if (inargs) { |
4e03ae57 DE |
1141 | char **arg; |
1142 | for (arg = inargs; *arg; arg++) | |
1143 | free(*arg); | |
72d0e1cb SG |
1144 | free(inargs); |
1145 | } | |
1146 | ||
858377e4 | 1147 | current_config = NULL; |
9f52e331 | 1148 | |
72d0e1cb SG |
1149 | return bret; |
1150 | } | |
1151 | ||
858377e4 | 1152 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1153 | { |
1154 | int ret; | |
1155 | ||
1156 | if (!c) | |
1157 | return false; | |
1158 | ||
ef6e34ee | 1159 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1160 | |
d775f21b | 1161 | return ret == 0; |
72d0e1cb SG |
1162 | } |
1163 | ||
858377e4 SH |
1164 | WRAP_API(bool, lxcapi_stop) |
1165 | ||
d5752559 SH |
1166 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1167 | { | |
78d44e5a CB |
1168 | int lasterr; |
1169 | size_t len; | |
1170 | char *p; | |
1171 | int ret = -1; | |
1172 | ||
d5752559 SH |
1173 | mode_t mask = umask(0002); |
1174 | ret = mkdir(path, 0770); | |
1175 | lasterr = errno; | |
1176 | umask(mask); | |
1177 | errno = lasterr; | |
1178 | if (ret) { | |
78d44e5a | 1179 | if (errno != EEXIST) |
d5752559 | 1180 | return -1; |
78d44e5a CB |
1181 | |
1182 | ret = 0; | |
d5752559 | 1183 | } |
78d44e5a CB |
1184 | |
1185 | len = strlen(path); | |
1186 | p = alloca(len + 1); | |
d5752559 | 1187 | strcpy(p, path); |
78d44e5a CB |
1188 | if (!lxc_list_empty(&conf->id_map)) { |
1189 | ret = chown_mapped_root(p, conf); | |
1190 | if (ret < 0) | |
1191 | ret = -1; | |
d5752559 | 1192 | } |
78d44e5a | 1193 | |
d5752559 SH |
1194 | return ret; |
1195 | } | |
1196 | ||
dfa7eaeb | 1197 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1198 | static bool create_container_dir(struct lxc_container *c) |
1199 | { | |
dfa7eaeb CB |
1200 | int ret; |
1201 | size_t len; | |
72d0e1cb | 1202 | char *s; |
72d0e1cb | 1203 | |
2a59a681 | 1204 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1205 | s = malloc(len); |
1206 | if (!s) | |
1207 | return false; | |
dfa7eaeb | 1208 | |
2a59a681 | 1209 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1210 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1211 | free(s); |
1212 | return false; | |
1213 | } | |
dfa7eaeb | 1214 | |
d5752559 | 1215 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1216 | free(s); |
dfa7eaeb | 1217 | |
72d0e1cb SG |
1218 | return ret == 0; |
1219 | } | |
1220 | ||
10bc1861 CB |
1221 | /* do_storage_create: thin wrapper around storage_create(). Like |
1222 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1223 | */ |
10bc1861 CB |
1224 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1225 | const char *type, | |
1226 | struct bdev_specs *specs) | |
1897e3bc | 1227 | { |
e9e29a33 | 1228 | int ret; |
1897e3bc | 1229 | size_t len; |
e9e29a33 | 1230 | char *dest; |
10bc1861 | 1231 | struct lxc_storage *bdev; |
1897e3bc | 1232 | |
cd219ae6 | 1233 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1234 | if (c->lxc_conf->rootfs.path && |
1235 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1236 | const char *rpath = c->lxc_conf->rootfs.path; |
1237 | len = strlen(rpath) + 1; | |
cd219ae6 | 1238 | dest = alloca(len); |
cf465fe4 | 1239 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1240 | } else { |
858377e4 | 1241 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 SY |
1242 | len = strlen(c->name) + strlen(lxcpath) + 9; |
1243 | dest = alloca(len); | |
1244 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); | |
1245 | } | |
e9e29a33 | 1246 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1247 | return NULL; |
1248 | ||
10bc1861 | 1249 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1250 | if (!bdev) { |
e9e29a33 | 1251 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1252 | return NULL; |
d44e88c2 SH |
1253 | } |
1254 | ||
7a96a068 | 1255 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1256 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
f7ac4459 CB |
1257 | return NULL; |
1258 | } | |
cf3ef16d | 1259 | |
e9e29a33 CB |
1260 | /* If we are not root, chown the rootfs dir to root in the target user |
1261 | * namespace. | |
f7ac4459 | 1262 | */ |
e9e29a33 CB |
1263 | ret = geteuid(); |
1264 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1265 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1266 | if (ret < 0) { | |
1267 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1268 | suggest_default_idmap(); |
10bc1861 | 1269 | storage_put(bdev); |
cf3ef16d SH |
1270 | return NULL; |
1271 | } | |
1272 | } | |
1273 | ||
1897e3bc SH |
1274 | return bdev; |
1275 | } | |
1276 | ||
96b3cb40 | 1277 | static char *lxcbasename(char *path) |
72d0e1cb | 1278 | { |
47e55887 CB |
1279 | char *p; |
1280 | ||
1281 | p = path + strlen(path) - 1; | |
96b3cb40 SH |
1282 | while (*p != '/' && p > path) |
1283 | p--; | |
47e55887 | 1284 | |
96b3cb40 SH |
1285 | return p; |
1286 | } | |
72d0e1cb | 1287 | |
47e55887 CB |
1288 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1289 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1290 | { |
47e55887 | 1291 | int ret; |
96b3cb40 | 1292 | pid_t pid; |
72d0e1cb | 1293 | |
72d0e1cb | 1294 | if (!tpath) |
96b3cb40 | 1295 | return true; |
72d0e1cb SG |
1296 | |
1297 | pid = fork(); | |
1298 | if (pid < 0) { | |
7e34710e | 1299 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1300 | return false; |
72d0e1cb SG |
1301 | } |
1302 | ||
1a0e70ac | 1303 | if (pid == 0) { /* child */ |
47e55887 CB |
1304 | int i, len; |
1305 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1306 | char **newargv; |
47e55887 CB |
1307 | int nargs = 0; |
1308 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1309 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1310 | uid_t euid; |
72d0e1cb | 1311 | |
47e55887 CB |
1312 | if (need_null_stdfds) { |
1313 | ret = null_stdfds(); | |
1314 | if (ret < 0) | |
1315 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1316 | } |
1897e3bc | 1317 | |
8a388ed4 | 1318 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1319 | if (!bdev) { |
47e55887 | 1320 | ERROR("Failed to initialize storage"); |
7e34710e | 1321 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1322 | } |
1323 | ||
47e55887 CB |
1324 | euid = geteuid(); |
1325 | if (euid == 0) { | |
1326 | ret = unshare(CLONE_NEWNS); | |
1327 | if (ret < 0) { | |
1328 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1329 | _exit(EXIT_FAILURE); |
cf3ef16d | 1330 | } |
47e55887 CB |
1331 | |
1332 | ret = detect_shared_rootfs(); | |
1333 | if (ret == 1) { | |
1334 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1335 | if (ret < 0) { | |
1336 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1337 | ERROR("Continuing..."); |
1338 | } | |
1339 | } | |
1340 | } | |
47e55887 CB |
1341 | |
1342 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1343 | if (euid != 0) { | |
1344 | ERROR("Unprivileged users can only create " | |
1345 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1346 | _exit(EXIT_FAILURE); |
4de2791f | 1347 | } |
241978fa | 1348 | |
47e55887 CB |
1349 | if (strcmp(bdev->type, "overlay") == 0 || |
1350 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1351 | /* If we create an overlay container we need to |
1352 | * rsync the contents into | |
1353 | * <container-path>/<container-name>/rootfs. | |
1354 | * However, the overlay mount function will | |
1355 | * mount will mount | |
1356 | * <container-path>/<container-name>/delta0 | |
1357 | * over | |
1358 | * <container-path>/<container-name>/rootfs | |
1359 | * which means we would rsync the rootfs into | |
1360 | * the delta directory. That doesn't make sense | |
1361 | * since the delta directory only exists to | |
1362 | * record the differences to | |
1363 | * <container-path>/<container-name>/rootfs. So | |
1364 | * let's simply bind-mount here and then rsync | |
1365 | * directly into | |
1366 | * <container-path>/<container-name>/rootfs. | |
1367 | */ | |
1368 | char *src; | |
1369 | ||
1370 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1371 | if (!src) { | |
1372 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1373 | _exit(EXIT_FAILURE); |
241978fa CB |
1374 | } |
1375 | ||
1376 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1377 | if (ret < 0) { | |
1378 | ERROR("Failed to mount rootfs"); | |
1379 | return -1; | |
1380 | } | |
1381 | } else { | |
47e55887 CB |
1382 | ret = bdev->ops->mount(bdev); |
1383 | if (ret < 0) { | |
241978fa | 1384 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1385 | _exit(EXIT_FAILURE); |
241978fa | 1386 | } |
cf3ef16d | 1387 | } |
1a0e70ac | 1388 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1389 | const char *src; |
f10fad2f | 1390 | free(bdev->dest); |
e9705550 CB |
1391 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1392 | bdev->dest = strdup(src); | |
1897e3bc SH |
1393 | } |
1394 | ||
47e55887 CB |
1395 | /* Create our new array, pre-pend the template name and base |
1396 | * args. | |
72d0e1cb SG |
1397 | */ |
1398 | if (argv) | |
47e55887 CB |
1399 | for (nargs = 0; argv[nargs]; nargs++) { |
1400 | ; | |
1401 | } | |
1402 | /* template, path, rootfs and name args */ | |
1403 | nargs += 4; | |
cf3ef16d | 1404 | |
72d0e1cb SG |
1405 | newargv = malloc(nargs * sizeof(*newargv)); |
1406 | if (!newargv) | |
7e34710e | 1407 | _exit(EXIT_FAILURE); |
96b3cb40 | 1408 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 1409 | |
47e55887 | 1410 | /* --path */ |
2a59a681 | 1411 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1412 | patharg = malloc(len); |
1413 | if (!patharg) | |
7e34710e | 1414 | _exit(EXIT_FAILURE); |
2a59a681 | 1415 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1416 | if (ret < 0 || ret >= len) |
7e34710e | 1417 | _exit(EXIT_FAILURE); |
72d0e1cb | 1418 | newargv[1] = patharg; |
47e55887 CB |
1419 | |
1420 | /* --name */ | |
72d0e1cb SG |
1421 | len = strlen("--name=") + strlen(c->name) + 1; |
1422 | namearg = malloc(len); | |
1423 | if (!namearg) | |
7e34710e | 1424 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1425 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1426 | if (ret < 0 || ret >= len) | |
7e34710e | 1427 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1428 | newargv[2] = namearg; |
1429 | ||
47e55887 | 1430 | /* --rootfs */ |
1897e3bc SH |
1431 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1432 | rootfsarg = malloc(len); | |
1433 | if (!rootfsarg) | |
7e34710e | 1434 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1435 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1436 | if (ret < 0 || ret >= len) | |
7e34710e | 1437 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1438 | newargv[3] = rootfsarg; |
1439 | ||
72d0e1cb SG |
1440 | /* add passed-in args */ |
1441 | if (argv) | |
1897e3bc | 1442 | for (i = 4; i < nargs; i++) |
47e55887 | 1443 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1444 | |
1445 | /* add trailing NULL */ | |
1446 | nargs++; | |
1447 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1448 | if (!newargv) | |
7e34710e | 1449 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1450 | newargv[nargs - 1] = NULL; |
1451 | ||
47e55887 CB |
1452 | /* If we're running the template in a mapped userns, then we |
1453 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1454 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1455 | * the mapped uid for our geteuid() | |
cf3ef16d | 1456 | */ |
0e6e3a41 | 1457 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1458 | int extraargs, hostuid_mapped, hostgid_mapped; |
1459 | char **n2; | |
1460 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1461 | struct lxc_list *it; |
1462 | struct id_map *map; | |
47e55887 | 1463 | int n2args = 1; |
cf3ef16d | 1464 | |
47e55887 CB |
1465 | n2 = malloc(n2args * sizeof(*n2)); |
1466 | if (!n2) | |
7e34710e | 1467 | _exit(EXIT_FAILURE); |
47e55887 | 1468 | |
cf3ef16d SH |
1469 | newargv[0] = tpath; |
1470 | tpath = "lxc-usernsexec"; | |
1471 | n2[0] = "lxc-usernsexec"; | |
1472 | lxc_list_for_each(it, &conf->id_map) { | |
1473 | map = it->elem; | |
1474 | n2args += 2; | |
57d116ab | 1475 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1476 | if (!n2) |
7e34710e | 1477 | _exit(EXIT_FAILURE); |
47e55887 CB |
1478 | |
1479 | n2[n2args - 2] = "-m"; | |
1480 | n2[n2args - 1] = malloc(200); | |
1481 | if (!n2[n2args - 1]) | |
7e34710e | 1482 | _exit(EXIT_FAILURE); |
47e55887 CB |
1483 | |
1484 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1485 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1486 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1487 | if (ret < 0 || ret >= 200) |
7e34710e | 1488 | _exit(EXIT_FAILURE); |
cf3ef16d | 1489 | } |
47e55887 CB |
1490 | |
1491 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1492 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
57d116ab | 1493 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1494 | if (!n2) |
7e34710e | 1495 | _exit(EXIT_FAILURE); |
47e55887 CB |
1496 | |
1497 | if (hostuid_mapped < 0) { | |
1498 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1499 | n2[n2args++] = "-m"; |
47e55887 CB |
1500 | if (hostuid_mapped < 0) { |
1501 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1502 | _exit(EXIT_FAILURE); |
cf3ef16d | 1503 | } |
47e55887 | 1504 | |
cf3ef16d | 1505 | n2[n2args++] = malloc(200); |
47e55887 | 1506 | if (!n2[n2args - 1]) { |
cf3ef16d | 1507 | SYSERROR("out of memory"); |
7e34710e | 1508 | _exit(EXIT_FAILURE); |
cf3ef16d | 1509 | } |
47e55887 CB |
1510 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1511 | hostuid_mapped, geteuid()); | |
1512 | if (ret < 0 || ret >= 200) | |
7e34710e | 1513 | _exit(EXIT_FAILURE); |
cf3ef16d | 1514 | } |
47e55887 CB |
1515 | |
1516 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c SH |
1517 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
1518 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); | |
1519 | if (!n2) | |
7e34710e | 1520 | _exit(EXIT_FAILURE); |
47e55887 | 1521 | |
2133f58c | 1522 | if (hostgid_mapped < 0) { |
339efad9 | 1523 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1524 | n2[n2args++] = "-m"; |
1525 | if (hostgid_mapped < 0) { | |
47e55887 | 1526 | ERROR("Failed to find free gid to map"); |
7e34710e | 1527 | _exit(EXIT_FAILURE); |
2133f58c | 1528 | } |
47e55887 | 1529 | |
2133f58c | 1530 | n2[n2args++] = malloc(200); |
47e55887 | 1531 | if (!n2[n2args - 1]) { |
2133f58c | 1532 | SYSERROR("out of memory"); |
7e34710e | 1533 | _exit(EXIT_FAILURE); |
2133f58c | 1534 | } |
47e55887 CB |
1535 | |
1536 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1537 | hostgid_mapped, getegid()); | |
1538 | if (ret < 0 || ret >= 200) | |
7e34710e | 1539 | _exit(EXIT_FAILURE); |
2133f58c | 1540 | } |
cf3ef16d SH |
1541 | n2[n2args++] = "--"; |
1542 | for (i = 0; i < nargs; i++) | |
1543 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1544 | n2args += nargs; |
47e55887 CB |
1545 | |
1546 | /* Finally add "--mapped-uid $uid" to tell template what | |
1547 | * to chown cached images to. | |
1a0e70ac | 1548 | */ |
2133f58c | 1549 | n2args += 4; |
57d116ab | 1550 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1551 | if (!n2) |
7e34710e | 1552 | _exit(EXIT_FAILURE); |
47e55887 | 1553 | |
1a0e70ac | 1554 | /* note n2[n2args-1] is NULL */ |
47e55887 CB |
1555 | n2[n2args - 5] = "--mapped-uid"; |
1556 | snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1557 | n2[n2args - 4] = txtuid; | |
1558 | n2[n2args - 3] = "--mapped-gid"; | |
2133f58c | 1559 | snprintf(txtgid, 20, "%d", hostgid_mapped); |
47e55887 CB |
1560 | n2[n2args - 2] = txtgid; |
1561 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1562 | free(newargv); |
1563 | newargv = n2; | |
1564 | } | |
47e55887 | 1565 | |
cf3ef16d | 1566 | execvp(tpath, newargv); |
e9705550 | 1567 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1568 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1569 | } |
1570 | ||
47e55887 CB |
1571 | ret = wait_for_pid(pid); |
1572 | if (ret != 0) { | |
1573 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1574 | return false; |
1575 | } | |
1576 | ||
1577 | return true; | |
1578 | } | |
1579 | ||
74a3920a | 1580 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1581 | { |
1fd9bd50 | 1582 | long flen; |
630ac7c6 | 1583 | size_t len; |
b4569e93 | 1584 | char *contents; |
3ce74686 | 1585 | FILE *f; |
025ed0f3 | 1586 | int ret = -1; |
52026772 | 1587 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1588 | int i; |
3ce74686 | 1589 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1590 | char *tpath; |
52026772 | 1591 | #endif |
3ce74686 | 1592 | |
025ed0f3 | 1593 | f = fopen(path, "r"); |
025ed0f3 | 1594 | if (f == NULL) |
3ce74686 | 1595 | return false; |
025ed0f3 | 1596 | |
630ac7c6 CB |
1597 | ret = fseek(f, 0, SEEK_END); |
1598 | if (ret < 0) | |
025ed0f3 | 1599 | goto out_error; |
630ac7c6 CB |
1600 | |
1601 | ret = -1; | |
1602 | flen = ftell(f); | |
1603 | if (flen < 0) | |
025ed0f3 | 1604 | goto out_error; |
630ac7c6 CB |
1605 | |
1606 | ret = fseek(f, 0, SEEK_SET); | |
1607 | if (ret < 0) | |
025ed0f3 | 1608 | goto out_error; |
630ac7c6 CB |
1609 | |
1610 | ret = fseek(f, 0, SEEK_SET); | |
1611 | if (ret < 0) | |
1612 | goto out_error; | |
1613 | ||
1614 | ret = -1; | |
1615 | contents = malloc(flen + 1); | |
1616 | if (!contents) | |
025ed0f3 | 1617 | goto out_error; |
630ac7c6 CB |
1618 | |
1619 | len = fread(contents, 1, flen, f); | |
1620 | if (len != flen) | |
025ed0f3 SH |
1621 | goto out_free_contents; |
1622 | ||
3ce74686 | 1623 | contents[flen] = '\0'; |
025ed0f3 | 1624 | ret = fclose(f); |
025ed0f3 SH |
1625 | f = NULL; |
1626 | if (ret < 0) | |
1627 | goto out_free_contents; | |
3ce74686 | 1628 | |
b4569e93 | 1629 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1630 | tpath = get_template_path(t); |
85db5535 | 1631 | if (!tpath) { |
630ac7c6 | 1632 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1633 | goto out_free_contents; |
3ce74686 SH |
1634 | } |
1635 | ||
85db5535 DE |
1636 | ret = sha1sum_file(tpath, md_value); |
1637 | if (ret < 0) { | |
630ac7c6 | 1638 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1639 | free(tpath); |
85db5535 | 1640 | goto out_free_contents; |
3ce74686 | 1641 | } |
cef701ed | 1642 | free(tpath); |
3ce74686 SH |
1643 | #endif |
1644 | ||
025ed0f3 | 1645 | f = fopen(path, "w"); |
025ed0f3 | 1646 | if (f == NULL) { |
630ac7c6 | 1647 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1648 | free(contents); |
1649 | return false; | |
1650 | } | |
630ac7c6 | 1651 | |
3ce74686 SH |
1652 | fprintf(f, "# Template used to create this container: %s\n", t); |
1653 | if (argv) { | |
1654 | fprintf(f, "# Parameters passed to the template:"); | |
1655 | while (*argv) { | |
1656 | fprintf(f, " %s", *argv); | |
1657 | argv++; | |
1658 | } | |
1659 | fprintf(f, "\n"); | |
1660 | } | |
1661 | #if HAVE_LIBGNUTLS | |
56698177 SH |
1662 | fprintf(f, "# Template script checksum (SHA-1): "); |
1663 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1664 | fprintf(f, "%02x", md_value[i]); | |
1665 | fprintf(f, "\n"); | |
3ce74686 | 1666 | #endif |
0520c252 | 1667 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1668 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1669 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1670 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1671 | if (fwrite(contents, 1, flen, f) != flen) { |
1672 | SYSERROR("Writing original contents"); | |
1673 | free(contents); | |
1674 | fclose(f); | |
1675 | return false; | |
1676 | } | |
630ac7c6 | 1677 | |
025ed0f3 | 1678 | ret = 0; |
630ac7c6 | 1679 | |
025ed0f3 | 1680 | out_free_contents: |
3ce74686 | 1681 | free(contents); |
630ac7c6 | 1682 | |
025ed0f3 SH |
1683 | out_error: |
1684 | if (f) { | |
1685 | int newret; | |
025ed0f3 | 1686 | newret = fclose(f); |
025ed0f3 SH |
1687 | if (ret == 0) |
1688 | ret = newret; | |
1689 | } | |
630ac7c6 | 1690 | |
025ed0f3 SH |
1691 | if (ret < 0) { |
1692 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1693 | return false; |
1694 | } | |
630ac7c6 | 1695 | |
3ce74686 SH |
1696 | return true; |
1697 | } | |
1698 | ||
4df7f012 SH |
1699 | static void lxcapi_clear_config(struct lxc_container *c) |
1700 | { | |
e62fd16f CB |
1701 | if (!c || !c->lxc_conf) |
1702 | return; | |
1703 | ||
1704 | lxc_conf_free(c->lxc_conf); | |
1705 | c->lxc_conf = NULL; | |
4df7f012 SH |
1706 | } |
1707 | ||
858377e4 SH |
1708 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1709 | ||
96b3cb40 SH |
1710 | /* |
1711 | * lxcapi_create: | |
1712 | * create a container with the given parameters. | |
1713 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1714 | * configuration already set | |
1715 | * @t: the template to execute to instantiate the root filesystem and | |
1716 | * adjust the configuration. | |
1717 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1718 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1719 | * use. | |
1720 | * | |
1721 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1722 | * arguments, you can just pass NULL. | |
1723 | */ | |
858377e4 | 1724 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1725 | const char *bdevtype, struct bdev_specs *specs, |
1726 | int flags, char *const argv[]) | |
96b3cb40 | 1727 | { |
e9e29a33 | 1728 | int partial_fd; |
51f0f73b | 1729 | mode_t mask; |
96b3cb40 | 1730 | pid_t pid; |
e9e29a33 | 1731 | bool ret = false; |
85db5535 | 1732 | char *tpath = NULL; |
96b3cb40 SH |
1733 | |
1734 | if (!c) | |
1735 | return false; | |
1736 | ||
85db5535 DE |
1737 | if (t) { |
1738 | tpath = get_template_path(t); | |
1739 | if (!tpath) { | |
e9e29a33 | 1740 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1741 | goto out; |
1742 | } | |
96b3cb40 SH |
1743 | } |
1744 | ||
e9e29a33 CB |
1745 | /* If a template is passed in, and the rootfs already is defined in the |
1746 | * container config and exists, then the caller is trying to create an | |
1747 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1748 | */ |
858377e4 | 1749 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
cf465fe4 | 1750 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1751 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1752 | c->config_path); | |
6c6892b5 | 1753 | goto free_tpath; |
cf465fe4 SH |
1754 | } |
1755 | ||
6c6892b5 | 1756 | if (!c->lxc_conf) { |
858377e4 | 1757 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1758 | ERROR("Error loading default configuration file %s", |
1759 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1760 | goto free_tpath; |
1761 | } | |
96b3cb40 SH |
1762 | } |
1763 | ||
6c6892b5 DE |
1764 | if (!create_container_dir(c)) |
1765 | goto free_tpath; | |
1766 | ||
e9e29a33 CB |
1767 | /* If both template and rootfs.path are set, template is setup as |
1768 | * rootfs.path. The container is already created if we have a config and | |
1769 | * rootfs.path is accessible | |
0590e82c | 1770 | */ |
00370edd | 1771 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1772 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1773 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1774 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1775 | goto out; |
1776 | } | |
1777 | ret = true; | |
0590e82c | 1778 | goto out; |
00370edd | 1779 | } |
e9e29a33 CB |
1780 | |
1781 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1782 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1783 | goto out; |
e9e29a33 | 1784 | |
858377e4 | 1785 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1786 | /* Rootfs already existed, user just wanted to save the loaded |
1787 | * configuration. | |
1788 | */ | |
0f4cdd77 | 1789 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1790 | ERROR("Failed to save initial config for \"%s\"", c->name); |
0590e82c SH |
1791 | ret = true; |
1792 | goto out; | |
a69aad27 | 1793 | } |
96b3cb40 SH |
1794 | |
1795 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1796 | partial_fd = create_partial(c); |
1797 | if (partial_fd < 0) | |
96b3cb40 SH |
1798 | goto out; |
1799 | ||
e9e29a33 | 1800 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1801 | |
51f0f73b KR |
1802 | mask = umask(0022); |
1803 | ||
e9e29a33 | 1804 | /* Create the storage. |
96b3cb40 SH |
1805 | * Note we can't do this in the same task as we use to execute the |
1806 | * template because of the way zfs works. | |
1807 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1808 | * namespace. | |
1809 | */ | |
1810 | pid = fork(); | |
1811 | if (pid < 0) { | |
e9e29a33 | 1812 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1813 | goto out_unlock; |
1814 | } | |
1815 | ||
1a0e70ac | 1816 | if (pid == 0) { /* child */ |
10bc1861 | 1817 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1818 | |
10bc1861 CB |
1819 | bdev = do_storage_create(c, bdevtype, specs); |
1820 | if (!bdev) { | |
e9e29a33 CB |
1821 | ERROR("Failed to create %s storage for %s", |
1822 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1823 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1824 | } |
1825 | ||
e9e29a33 | 1826 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1827 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1828 | ERROR("Failed to save initial config for %s", c->name); |
1829 | /* Parent task won't see the storage driver in the | |
1830 | * config so we delete it. | |
1831 | */ | |
96b3cb40 SH |
1832 | bdev->ops->umount(bdev); |
1833 | bdev->ops->destroy(bdev); | |
85aec4ac | 1834 | _exit(EXIT_FAILURE); |
96b3cb40 | 1835 | } |
85aec4ac | 1836 | _exit(EXIT_SUCCESS); |
96b3cb40 SH |
1837 | } |
1838 | if (wait_for_pid(pid) != 0) | |
a09295f8 | 1839 | goto out_unlock; |
96b3cb40 | 1840 | |
e9e29a33 | 1841 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1842 | lxc_conf_free(c->lxc_conf); |
96b3cb40 SH |
1843 | c->lxc_conf = NULL; |
1844 | if (!load_config_locked(c, c->configfile)) | |
a09295f8 | 1845 | goto out_unlock; |
96b3cb40 | 1846 | |
dc23c1c8 | 1847 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1848 | goto out_unlock; |
1849 | ||
1a0e70ac CB |
1850 | /* Now clear out the lxc_conf we have, reload from the created |
1851 | * container. | |
1852 | */ | |
858377e4 | 1853 | do_lxcapi_clear_config(c); |
3ce74686 | 1854 | |
9d65a487 KY |
1855 | if (t) { |
1856 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1857 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1858 | goto out_unlock; |
1859 | } | |
3ce74686 | 1860 | } |
a69aad27 | 1861 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1862 | |
1863 | out_unlock: | |
51f0f73b | 1864 | umask(mask); |
3e625e2d SH |
1865 | if (partial_fd >= 0) |
1866 | remove_partial(c, partial_fd); | |
72d0e1cb | 1867 | out: |
c55d4505 | 1868 | if (!ret) |
17a367d8 | 1869 | container_destroy(c, NULL); |
6c6892b5 | 1870 | free_tpath: |
f10fad2f | 1871 | free(tpath); |
a69aad27 | 1872 | return ret; |
72d0e1cb SG |
1873 | } |
1874 | ||
858377e4 | 1875 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1876 | const char *bdevtype, struct bdev_specs *specs, |
1877 | int flags, char *const argv[]) | |
858377e4 SH |
1878 | { |
1879 | bool ret; | |
1880 | current_config = c ? c->lxc_conf : NULL; | |
1881 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); | |
1882 | current_config = NULL; | |
1883 | return ret; | |
1884 | } | |
1885 | ||
1886 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d SH |
1887 | { |
1888 | pid_t pid; | |
dd267776 | 1889 | int rebootsignal = SIGINT; |
3e625e2d SH |
1890 | |
1891 | if (!c) | |
1892 | return false; | |
858377e4 | 1893 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1894 | return false; |
858377e4 | 1895 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1896 | if (pid <= 0) |
1897 | return false; | |
dd267776 BP |
1898 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1899 | rebootsignal = c->lxc_conf->rebootsignal; | |
591614a7 CB |
1900 | if (kill(pid, rebootsignal) < 0) { |
1901 | WARN("Could not send signal %d to pid %d.", rebootsignal, pid); | |
3e625e2d | 1902 | return false; |
591614a7 | 1903 | } |
3e625e2d SH |
1904 | return true; |
1905 | ||
1906 | } | |
1907 | ||
858377e4 SH |
1908 | WRAP_API(bool, lxcapi_reboot) |
1909 | ||
d39b10eb CB |
1910 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
1911 | { | |
1912 | int killret, ret; | |
1913 | pid_t pid; | |
1914 | int rebootsignal = SIGINT, state_client_fd = -1; | |
1915 | lxc_state_t states[MAX_STATE] = {0}; | |
1916 | ||
1917 | if (!c) | |
1918 | return false; | |
1919 | ||
1920 | if (!do_lxcapi_is_running(c)) | |
1921 | return true; | |
1922 | ||
1923 | pid = do_lxcapi_init_pid(c); | |
1924 | if (pid <= 0) | |
1925 | return true; | |
1926 | ||
1927 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
1928 | rebootsignal = c->lxc_conf->rebootsignal; | |
1929 | ||
1930 | /* Add a new state client before sending the shutdown signal so that we | |
1931 | * don't miss a state. | |
1932 | */ | |
1933 | if (timeout != 0) { | |
1934 | states[RUNNING] = 2; | |
1935 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
1936 | &state_client_fd); | |
1937 | if (ret < 0) | |
1938 | return false; | |
1939 | ||
1940 | if (state_client_fd < 0) | |
1941 | return false; | |
1942 | ||
1943 | if (ret == RUNNING) | |
1944 | return true; | |
1945 | ||
1946 | if (ret < MAX_STATE) | |
1947 | return false; | |
1948 | } | |
1949 | ||
1950 | /* Send reboot signal to container. */ | |
1951 | killret = kill(pid, rebootsignal); | |
1952 | if (killret < 0) { | |
1953 | WARN("Could not send signal %d to pid %d", rebootsignal, pid); | |
1954 | if (state_client_fd >= 0) | |
1955 | close(state_client_fd); | |
1956 | return false; | |
1957 | } | |
1958 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
1959 | ||
1960 | if (timeout == 0) | |
1961 | return true; | |
1962 | ||
1963 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
1964 | close(state_client_fd); | |
1965 | if (ret < 0) | |
1966 | return false; | |
1967 | ||
1968 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
1969 | if (ret != RUNNING) | |
1970 | return false; | |
1971 | ||
1972 | return true; | |
1973 | } | |
1974 | ||
1975 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
1976 | ||
858377e4 | 1977 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 1978 | { |
f8bdb6dc | 1979 | int killret, ret; |
72d0e1cb | 1980 | pid_t pid; |
f8bdb6dc | 1981 | int haltsignal = SIGPWR, state_client_fd = -1; |
92e35018 | 1982 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
1983 | |
1984 | if (!c) | |
1985 | return false; | |
1986 | ||
858377e4 | 1987 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 1988 | return true; |
f8bdb6dc | 1989 | |
858377e4 | 1990 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
1991 | if (pid <= 0) |
1992 | return true; | |
330ae3d3 CB |
1993 | |
1994 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
1995 | if (task_blocking_signal(pid, (SIGRTMIN + 3))) | |
1996 | haltsignal = (SIGRTMIN + 3); | |
1997 | ||
b0227444 | 1998 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 1999 | haltsignal = c->lxc_conf->haltsignal; |
330ae3d3 | 2000 | |
92e35018 CB |
2001 | /* Add a new state client before sending the shutdown signal so that we |
2002 | * don't miss a state. | |
2003 | */ | |
f8bdb6dc CB |
2004 | if (timeout != 0) { |
2005 | states[STOPPED] = 1; | |
2006 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2007 | &state_client_fd); | |
2008 | if (ret < 0) | |
2009 | return false; | |
92e35018 | 2010 | |
f8bdb6dc CB |
2011 | if (state_client_fd < 0) |
2012 | return false; | |
2013 | ||
2014 | if (ret == STOPPED) | |
2015 | return true; | |
591614a7 | 2016 | |
f8bdb6dc | 2017 | if (ret < MAX_STATE) |
92e35018 | 2018 | return false; |
92e35018 CB |
2019 | } |
2020 | ||
f8bdb6dc CB |
2021 | /* Send shutdown signal to container. */ |
2022 | killret = kill(pid, haltsignal); | |
2023 | if (killret < 0) { | |
2024 | WARN("Could not send signal %d to pid %d", haltsignal, pid); | |
2025 | if (state_client_fd >= 0) | |
2026 | close(state_client_fd); | |
2027 | return false; | |
2028 | } | |
2029 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2030 | ||
2031 | if (timeout == 0) | |
2032 | return true; | |
2033 | ||
2034 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2035 | close(state_client_fd); | |
2036 | if (ret < 0) | |
2037 | return false; | |
2038 | ||
2039 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2040 | if (ret != STOPPED) | |
2041 | return false; | |
2042 | ||
2043 | return true; | |
72d0e1cb SG |
2044 | } |
2045 | ||
858377e4 SH |
2046 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2047 | ||
1897e3bc | 2048 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2049 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2050 | { |
2051 | bool bret = false; | |
a0e93eeb | 2052 | char **args = NULL; |
72d0e1cb | 2053 | va_list ap; |
72d0e1cb SG |
2054 | |
2055 | if (!c) | |
2056 | return false; | |
2057 | ||
858377e4 SH |
2058 | current_config = c->lxc_conf; |
2059 | ||
72d0e1cb SG |
2060 | /* |
2061 | * since we're going to wait for create to finish, I don't think we | |
2062 | * need to get a copy of the arguments. | |
2063 | */ | |
dc23c1c8 | 2064 | va_start(ap, flags); |
a0e93eeb | 2065 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2066 | va_end(ap); |
a0e93eeb | 2067 | if (!args) { |
e9e29a33 | 2068 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2069 | goto out; |
2070 | } | |
72d0e1cb | 2071 | |
858377e4 | 2072 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2073 | |
2074 | out: | |
a0e93eeb | 2075 | free(args); |
858377e4 | 2076 | current_config = NULL; |
72d0e1cb SG |
2077 | return bret; |
2078 | } | |
2079 | ||
6b0d5538 SH |
2080 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2081 | { | |
4222a9f4 CB |
2082 | if (!strcmp(key, "lxc.cgroup")) |
2083 | return clear_unexp_config_line(conf, key, true); | |
2084 | ||
2085 | if (!strcmp(key, "lxc.network")) | |
2086 | return clear_unexp_config_line(conf, key, true); | |
2087 | ||
2088 | if (!strcmp(key, "lxc.net")) | |
2089 | return clear_unexp_config_line(conf, key, true); | |
2090 | ||
2091 | /* Clear a network with a specific index. */ | |
2092 | if (!strncmp(key, "lxc.net.", 8)) { | |
2093 | int ret; | |
2094 | const char *idx; | |
2095 | ||
2096 | idx = key + 8; | |
2097 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2098 | if (!ret) | |
2099 | return clear_unexp_config_line(conf, key, true); | |
2100 | } | |
2101 | ||
2102 | if (!strcmp(key, "lxc.hook")) | |
2103 | return clear_unexp_config_line(conf, key, true); | |
2104 | ||
2105 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2106 | } |
2107 | ||
6afd673f CB |
2108 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2109 | const char *key) | |
72d0e1cb | 2110 | { |
6afd673f CB |
2111 | int ret = 1; |
2112 | struct lxc_config_t *config; | |
72d0e1cb SG |
2113 | |
2114 | if (!c || !c->lxc_conf) | |
2115 | return false; | |
6afd673f | 2116 | |
5cee8c50 | 2117 | if (container_mem_lock(c)) |
72d0e1cb | 2118 | return false; |
6afd673f | 2119 | |
300df83e | 2120 | config = lxc_get_config(key); |
6afd673f CB |
2121 | /* Verify that the config key exists and that it has a callback |
2122 | * implemented. | |
2123 | */ | |
2124 | if (config && config->clr) | |
26471403 | 2125 | ret = config->clr(key, c->lxc_conf, NULL); |
6b0d5538 SH |
2126 | if (!ret) |
2127 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2128 | |
5cee8c50 | 2129 | container_mem_unlock(c); |
72d0e1cb SG |
2130 | return ret == 0; |
2131 | } | |
2132 | ||
858377e4 SH |
2133 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2134 | ||
e0f59189 | 2135 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2136 | { |
858377e4 | 2137 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2138 | |
0e6e3a41 | 2139 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && access("/proc/self/ns/user", F_OK) == 0) { |
51d0854c DY |
2140 | if (!switch_to_ns(pid, "user")) |
2141 | return false; | |
9c83a661 | 2142 | } |
51d0854c | 2143 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2144 | } |
2145 | ||
1a0e70ac | 2146 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2147 | static inline int string_cmp(char **first, char **second) |
2148 | { | |
2149 | return strcmp(*first, *second); | |
2150 | } | |
2151 | ||
1a0e70ac CB |
2152 | /* Used by qsort and bsearch functions for comparing container names. */ |
2153 | static inline int container_cmp(struct lxc_container **first, | |
2154 | struct lxc_container **second) | |
9c88ff1f ÇO |
2155 | { |
2156 | return strcmp((*first)->name, (*second)->name); | |
2157 | } | |
2158 | ||
2159 | static bool add_to_array(char ***names, char *cname, int pos) | |
2160 | { | |
2161 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2162 | if (!newnames) { | |
2163 | ERROR("Out of memory"); | |
2164 | return false; | |
2165 | } | |
2166 | ||
2167 | *names = newnames; | |
2168 | newnames[pos] = strdup(cname); | |
2169 | if (!newnames[pos]) | |
2170 | return false; | |
2171 | ||
1a0e70ac CB |
2172 | /* Sort the arrray as we will use binary search on it. */ |
2173 | qsort(newnames, pos + 1, sizeof(char *), | |
2174 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2175 | |
2176 | return true; | |
2177 | } | |
2178 | ||
1a0e70ac CB |
2179 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2180 | int pos, bool sort) | |
9c88ff1f | 2181 | { |
1a0e70ac | 2182 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2183 | if (!newlist) { |
2184 | ERROR("Out of memory"); | |
2185 | return false; | |
2186 | } | |
2187 | ||
2188 | *list = newlist; | |
2189 | newlist[pos] = c; | |
2190 | ||
1a0e70ac | 2191 | /* Sort the arrray as we will use binary search on it. */ |
2871830a | 2192 | if (sort) |
1a0e70ac CB |
2193 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2194 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2195 | |
2196 | return true; | |
2197 | } | |
2198 | ||
2199 | static char** get_from_array(char ***names, char *cname, int size) | |
2200 | { | |
2201 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2202 | } | |
2203 | ||
2204 | ||
2205 | static bool array_contains(char ***names, char *cname, int size) { | |
2206 | if(get_from_array(names, cname, size) != NULL) | |
2207 | return true; | |
2208 | return false; | |
2209 | } | |
2210 | ||
2211 | static bool remove_from_array(char ***names, char *cname, int size) | |
2212 | { | |
2213 | char **result = get_from_array(names, cname, size); | |
2214 | if (result != NULL) { | |
2215 | free(result); | |
2216 | return true; | |
2217 | } | |
2218 | return false; | |
2219 | } | |
2220 | ||
858377e4 | 2221 | static char ** do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2222 | { |
ae22a220 ÇO |
2223 | pid_t pid; |
2224 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2225 | char **interfaces = NULL; |
ae22a220 | 2226 | char interface[IFNAMSIZ]; |
799f29ab | 2227 | |
ae22a220 ÇO |
2228 | if(pipe(pipefd) < 0) { |
2229 | SYSERROR("pipe failed"); | |
2230 | return NULL; | |
c868b261 ÇO |
2231 | } |
2232 | ||
ae22a220 ÇO |
2233 | pid = fork(); |
2234 | if (pid < 0) { | |
959aee9c | 2235 | SYSERROR("failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2236 | close(pipefd[0]); |
2237 | close(pipefd[1]); | |
2238 | return NULL; | |
2239 | } | |
799f29ab | 2240 | |
1a0e70ac | 2241 | if (pid == 0) { /* child */ |
ae22a220 ÇO |
2242 | int ret = 1, nbytes; |
2243 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
2244 | ||
2245 | /* close the read-end of the pipe */ | |
2246 | close(pipefd[0]); | |
2247 | ||
e0f59189 | 2248 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
2249 | SYSERROR("failed to enter namespace"); |
2250 | goto out; | |
2251 | } | |
2252 | ||
2253 | /* Grab the list of interfaces */ | |
2254 | if (getifaddrs(&interfaceArray)) { | |
2255 | SYSERROR("failed to get interfaces list"); | |
2256 | goto out; | |
2257 | } | |
2258 | ||
2259 | /* Iterate through the interfaces */ | |
2260 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
2261 | nbytes = write(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); | |
2262 | if (nbytes < 0) { | |
2263 | ERROR("write failed"); | |
2264 | goto out; | |
2265 | } | |
2266 | count++; | |
2267 | } | |
2268 | ret = 0; | |
2269 | ||
2270 | out: | |
2271 | if (interfaceArray) | |
2272 | freeifaddrs(interfaceArray); | |
2273 | ||
2274 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2275 | close(pipefd[1]); | |
02c611b0 | 2276 | _exit(ret); |
799f29ab ÇO |
2277 | } |
2278 | ||
ae22a220 ÇO |
2279 | /* close the write-end of the pipe */ |
2280 | close(pipefd[1]); | |
2281 | ||
358afd84 | 2282 | while (read(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2283 | interface[IFNAMSIZ - 1] = '\0'; |
2284 | ||
ae22a220 ÇO |
2285 | if (array_contains(&interfaces, interface, count)) |
2286 | continue; | |
799f29ab | 2287 | |
ae22a220 | 2288 | if(!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2289 | ERROR("Failed to add \"%s\" to array", interface); |
2290 | ||
9c88ff1f ÇO |
2291 | count++; |
2292 | } | |
799f29ab | 2293 | |
ae22a220 ÇO |
2294 | if (wait_for_pid(pid) != 0) { |
2295 | for(i=0;i<count;i++) | |
2296 | free(interfaces[i]); | |
2297 | free(interfaces); | |
2298 | interfaces = NULL; | |
2299 | } | |
9c88ff1f | 2300 | |
ae22a220 ÇO |
2301 | /* close the read-end of the pipe */ |
2302 | close(pipefd[0]); | |
799f29ab | 2303 | |
9c88ff1f ÇO |
2304 | /* Append NULL to the array */ |
2305 | if(interfaces) | |
2306 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); | |
799f29ab | 2307 | |
9c88ff1f | 2308 | return interfaces; |
799f29ab ÇO |
2309 | } |
2310 | ||
858377e4 SH |
2311 | WRAP_API(char **, lxcapi_get_interfaces) |
2312 | ||
2313 | static char** do_lxcapi_get_ips(struct lxc_container *c, const char* interface, const char* family, int scope) | |
799f29ab | 2314 | { |
ae22a220 ÇO |
2315 | pid_t pid; |
2316 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2317 | char **addresses = NULL; |
ae22a220 | 2318 | char address[INET6_ADDRSTRLEN]; |
799f29ab | 2319 | |
ae22a220 ÇO |
2320 | if(pipe(pipefd) < 0) { |
2321 | SYSERROR("pipe failed"); | |
2322 | return NULL; | |
c868b261 ÇO |
2323 | } |
2324 | ||
ae22a220 ÇO |
2325 | pid = fork(); |
2326 | if (pid < 0) { | |
959aee9c | 2327 | SYSERROR("failed to fork task to get container ips"); |
ae22a220 ÇO |
2328 | close(pipefd[0]); |
2329 | close(pipefd[1]); | |
2330 | return NULL; | |
9c83a661 SG |
2331 | } |
2332 | ||
1a0e70ac | 2333 | if (pid == 0) { /* child */ |
ae22a220 ÇO |
2334 | int ret = 1, nbytes; |
2335 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
2336 | char addressOutputBuffer[INET6_ADDRSTRLEN]; | |
2337 | void *tempAddrPtr = NULL; | |
2338 | char *address = NULL; | |
fe218ca3 | 2339 | |
ae22a220 ÇO |
2340 | /* close the read-end of the pipe */ |
2341 | close(pipefd[0]); | |
2342 | ||
e0f59189 | 2343 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
2344 | SYSERROR("failed to enter namespace"); |
2345 | goto out; | |
9c83a661 | 2346 | } |
ae22a220 ÇO |
2347 | |
2348 | /* Grab the list of interfaces */ | |
2349 | if (getifaddrs(&interfaceArray)) { | |
2350 | SYSERROR("failed to get interfaces list"); | |
2351 | goto out; | |
2352 | } | |
2353 | ||
2354 | /* Iterate through the interfaces */ | |
2355 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
2356 | if (tempIfAddr->ifa_addr == NULL) | |
9c83a661 SG |
2357 | continue; |
2358 | ||
ae22a220 ÇO |
2359 | if(tempIfAddr->ifa_addr->sa_family == AF_INET) { |
2360 | if (family && strcmp(family, "inet")) | |
2361 | continue; | |
2362 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; | |
2363 | } | |
2364 | else { | |
2365 | if (family && strcmp(family, "inet6")) | |
2366 | continue; | |
2367 | ||
2368 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2369 | continue; | |
2370 | ||
2371 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2372 | } | |
2373 | ||
2374 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) | |
2375 | continue; | |
2376 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2377 | continue; |
2378 | ||
ae22a220 ÇO |
2379 | address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
2380 | tempAddrPtr, | |
2381 | addressOutputBuffer, | |
2382 | sizeof(addressOutputBuffer)); | |
2383 | if (!address) | |
2384 | continue; | |
2385 | ||
2386 | nbytes = write(pipefd[1], address, INET6_ADDRSTRLEN); | |
2387 | if (nbytes < 0) { | |
2388 | ERROR("write failed"); | |
2389 | goto out; | |
2390 | } | |
2391 | count++; | |
9c83a661 | 2392 | } |
ae22a220 | 2393 | ret = 0; |
9c83a661 | 2394 | |
ae22a220 ÇO |
2395 | out: |
2396 | if(interfaceArray) | |
2397 | freeifaddrs(interfaceArray); | |
9c83a661 | 2398 | |
ae22a220 ÇO |
2399 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2400 | close(pipefd[1]); | |
fe1ce58c | 2401 | _exit(ret); |
6849cb5b | 2402 | } |
9c83a661 | 2403 | |
ae22a220 ÇO |
2404 | /* close the write-end of the pipe */ |
2405 | close(pipefd[1]); | |
2406 | ||
358afd84 | 2407 | while (read(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
9c88ff1f | 2408 | if(!add_to_array(&addresses, address, count)) |
ae22a220 | 2409 | ERROR("PARENT: add_to_array failed"); |
9c88ff1f | 2410 | count++; |
9c83a661 SG |
2411 | } |
2412 | ||
ae22a220 ÇO |
2413 | if (wait_for_pid(pid) != 0) { |
2414 | for(i=0;i<count;i++) | |
2415 | free(addresses[i]); | |
2416 | free(addresses); | |
2417 | addresses = NULL; | |
2418 | } | |
9c83a661 | 2419 | |
ae22a220 ÇO |
2420 | /* close the read-end of the pipe */ |
2421 | close(pipefd[0]); | |
9c83a661 SG |
2422 | |
2423 | /* Append NULL to the array */ | |
9c88ff1f ÇO |
2424 | if(addresses) |
2425 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); | |
9c83a661 SG |
2426 | |
2427 | return addresses; | |
2428 | } | |
2429 | ||
858377e4 SH |
2430 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2431 | ||
2432 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2433 | { |
fce687aa CB |
2434 | int ret = -1; |
2435 | struct lxc_config_t *config; | |
72d0e1cb SG |
2436 | |
2437 | if (!c || !c->lxc_conf) | |
2438 | return -1; | |
fce687aa | 2439 | |
5cee8c50 | 2440 | if (container_mem_lock(c)) |
72d0e1cb | 2441 | return -1; |
fce687aa | 2442 | |
300df83e | 2443 | config = lxc_get_config(key); |
fce687aa CB |
2444 | /* Verify that the config key exists and that it has a callback |
2445 | * implemented. | |
2446 | */ | |
2447 | if (config && config->get) | |
cccd2219 | 2448 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2449 | |
5cee8c50 | 2450 | container_mem_unlock(c); |
72d0e1cb SG |
2451 | return ret; |
2452 | } | |
2453 | ||
858377e4 SH |
2454 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2455 | ||
2456 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2457 | { |
2458 | char *ret; | |
2459 | ||
2460 | if (!c || !c->lxc_conf) | |
2461 | return NULL; | |
2462 | if (container_mem_lock(c)) | |
2463 | return NULL; | |
858377e4 | 2464 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2465 | container_mem_unlock(c); |
2466 | return ret; | |
2467 | } | |
2468 | ||
858377e4 SH |
2469 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2470 | ||
2471 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2472 | { |
300df83e CB |
2473 | int ret = -1; |
2474 | ||
2475 | /* List all config items. */ | |
72d0e1cb | 2476 | if (!key) |
cfc67626 | 2477 | return lxc_list_config_items(retv, inlen); |
300df83e | 2478 | |
72d0e1cb SG |
2479 | if (!c || !c->lxc_conf) |
2480 | return -1; | |
300df83e | 2481 | |
5cee8c50 | 2482 | if (container_mem_lock(c)) |
72d0e1cb | 2483 | return -1; |
300df83e CB |
2484 | |
2485 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2486 | * This is an intelligent result to show which keys are valid given the | |
2487 | * type of nic it is. | |
2488 | */ | |
6fba98b5 | 2489 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2490 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2491 | else |
2492 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2493 | |
5cee8c50 | 2494 | container_mem_unlock(c); |
72d0e1cb SG |
2495 | return ret; |
2496 | } | |
2497 | ||
858377e4 SH |
2498 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2499 | ||
2500 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2501 | { |
0e1a60b0 | 2502 | int fd, lret; |
39dc698c | 2503 | bool ret = false, need_disklock = false; |
39dc698c | 2504 | |
72d0e1cb SG |
2505 | if (!alt_file) |
2506 | alt_file = c->configfile; | |
2507 | if (!alt_file) | |
1a0e70ac | 2508 | return false; |
39dc698c | 2509 | |
1a0e70ac | 2510 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2511 | if (!c->lxc_conf) { |
858377e4 | 2512 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2513 | ERROR("Error loading default configuration file %s " |
2514 | "while saving %s", | |
2515 | lxc_global_config_value("lxc.default_config"), | |
2516 | c->name); | |
72d0e1cb SG |
2517 | return false; |
2518 | } | |
39dc698c | 2519 | } |
72d0e1cb | 2520 | |
5a3d2e1e SG |
2521 | if (!create_container_dir(c)) |
2522 | return false; | |
2523 | ||
1a0e70ac CB |
2524 | /* If we're writing to the container's config file, take the disk lock. |
2525 | * Otherwise just take the memlock to protect the struct lxc_container | |
2526 | * while we're traversing it. | |
39dc698c SH |
2527 | */ |
2528 | if (strcmp(c->configfile, alt_file) == 0) | |
2529 | need_disklock = true; | |
2530 | ||
2531 | if (need_disklock) | |
2532 | lret = container_disk_lock(c); | |
2533 | else | |
2534 | lret = container_mem_lock(c); | |
39dc698c | 2535 | if (lret) |
72d0e1cb | 2536 | return false; |
39dc698c | 2537 | |
10034af5 | 2538 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
0e1a60b0 CB |
2539 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
2540 | if (fd < 0) | |
2541 | goto on_error; | |
2542 | ||
2543 | lret = write_config(fd, c->lxc_conf); | |
2544 | close(fd); | |
2545 | if (lret < 0) | |
2546 | goto on_error; | |
2547 | ||
39dc698c SH |
2548 | ret = true; |
2549 | ||
0e1a60b0 | 2550 | on_error: |
39dc698c SH |
2551 | if (need_disklock) |
2552 | container_disk_unlock(c); | |
2553 | else | |
2554 | container_mem_unlock(c); | |
0e1a60b0 | 2555 | |
39dc698c | 2556 | return ret; |
72d0e1cb SG |
2557 | } |
2558 | ||
858377e4 SH |
2559 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2560 | ||
0ea055b3 CB |
2561 | |
2562 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2563 | { |
0ea055b3 CB |
2564 | FILE *f1; |
2565 | struct stat fbuf; | |
42342bed CB |
2566 | void *buf = NULL; |
2567 | char *del = NULL; | |
dfb31b25 | 2568 | char path[MAXPATHLEN]; |
0ea055b3 CB |
2569 | char newpath[MAXPATHLEN]; |
2570 | int fd, ret, n = 0, v = 0; | |
dfb31b25 | 2571 | bool bret = false; |
42342bed | 2572 | size_t len = 0, bytes = 0; |
dfb31b25 | 2573 | |
0ea055b3 | 2574 | if (container_disk_lock(c0)) |
dfb31b25 | 2575 | return false; |
0ea055b3 CB |
2576 | |
2577 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c0->config_path, c0->name); | |
dfb31b25 SH |
2578 | if (ret < 0 || ret > MAXPATHLEN) |
2579 | goto out; | |
0ea055b3 CB |
2580 | ret = snprintf(newpath, MAXPATHLEN, "%s\n%s\n", c->config_path, c->name); |
2581 | if (ret < 0 || ret > MAXPATHLEN) | |
dfb31b25 | 2582 | goto out; |
0ea055b3 CB |
2583 | |
2584 | /* If we find an lxc-snapshot file using the old format only listing the | |
2585 | * number of snapshots we will keep using it. */ | |
2586 | f1 = fopen(path, "r"); | |
2587 | if (f1) { | |
2588 | n = fscanf(f1, "%d", &v); | |
2589 | fclose(f1); | |
2590 | if (n == 1 && v == 0) { | |
2591 | remove(path); | |
2592 | n = 0; | |
2593 | } | |
dfb31b25 | 2594 | } |
0ea055b3 CB |
2595 | if (n == 1) { |
2596 | v += inc ? 1 : -1; | |
2597 | f1 = fopen(path, "w"); | |
2598 | if (!f1) | |
2599 | goto out; | |
2600 | if (fprintf(f1, "%d\n", v) < 0) { | |
2601 | ERROR("Error writing new snapshots value"); | |
2602 | fclose(f1); | |
2603 | goto out; | |
2604 | } | |
2605 | ret = fclose(f1); | |
2606 | if (ret != 0) { | |
2607 | SYSERROR("Error writing to or closing snapshots file"); | |
2608 | goto out; | |
2609 | } | |
2610 | } else { | |
2611 | /* Here we know that we have or can use an lxc-snapshot file | |
2612 | * using the new format. */ | |
2613 | if (inc) { | |
2614 | f1 = fopen(path, "a"); | |
2615 | if (!f1) | |
2616 | goto out; | |
2617 | ||
2618 | if (fprintf(f1, "%s", newpath) < 0) { | |
2619 | ERROR("Error writing new snapshots entry"); | |
2620 | ret = fclose(f1); | |
2621 | if (ret != 0) | |
2622 | SYSERROR("Error writing to or closing snapshots file"); | |
2623 | goto out; | |
2624 | } | |
2625 | ||
2626 | ret = fclose(f1); | |
2627 | if (ret != 0) { | |
2628 | SYSERROR("Error writing to or closing snapshots file"); | |
2629 | goto out; | |
2630 | } | |
2631 | } else if (!inc) { | |
d028235d SG |
2632 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2633 | goto out; | |
2634 | ||
2635 | if (fstat(fd, &fbuf) < 0) { | |
2636 | close(fd); | |
2637 | goto out; | |
2638 | } | |
2639 | ||
2640 | if (fbuf.st_size != 0) { | |
d028235d | 2641 | |
25086a5f | 2642 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2643 | if (buf == MAP_FAILED) { |
2644 | SYSERROR("Failed to create mapping %s", path); | |
2645 | close(fd); | |
2646 | goto out; | |
2647 | } | |
2648 | ||
2649 | len = strlen(newpath); | |
2650 | while ((del = strstr((char *)buf, newpath))) { | |
2651 | memmove(del, del + len, strlen(del) - len + 1); | |
2652 | bytes += len; | |
2653 | } | |
2654 | ||
25086a5f | 2655 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2656 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2657 | SYSERROR("Failed to truncate file %s", path); | |
2658 | close(fd); | |
2659 | goto out; | |
2660 | } | |
2661 | } | |
2662 | close(fd); | |
2663 | } | |
0ea055b3 CB |
2664 | |
2665 | /* If the lxc-snapshot file is empty, remove it. */ | |
2666 | if (stat(path, &fbuf) < 0) | |
2667 | goto out; | |
d028235d SG |
2668 | if (!fbuf.st_size) { |
2669 | remove(path); | |
0ea055b3 | 2670 | } |
dfb31b25 SH |
2671 | } |
2672 | ||
2673 | bret = true; | |
2674 | ||
2675 | out: | |
0ea055b3 | 2676 | container_disk_unlock(c0); |
dfb31b25 SH |
2677 | return bret; |
2678 | } | |
2679 | ||
2680 | static void strip_newline(char *p) | |
2681 | { | |
2682 | size_t len = strlen(p); | |
2683 | if (len < 1) | |
2684 | return; | |
2685 | if (p[len-1] == '\n') | |
2686 | p[len-1] = '\0'; | |
2687 | } | |
2688 | ||
d825fff3 | 2689 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2690 | { |
2691 | struct lxc_container *p; | |
2692 | char *lxcpath = NULL, *lxcname = NULL, path[MAXPATHLEN]; | |
2693 | size_t pathlen = 0, namelen = 0; | |
2694 | FILE *f; | |
2695 | int ret; | |
2696 | ||
2697 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", | |
2698 | c->config_path, c->name); | |
2699 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2700 | ERROR("Path name too long"); | |
2701 | return; | |
2702 | } | |
025ed0f3 | 2703 | f = fopen(path, "r"); |
025ed0f3 | 2704 | if (f == NULL) |
dfb31b25 SH |
2705 | return; |
2706 | while (getline(&lxcpath, &pathlen, f) != -1) { | |
2707 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2708 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2709 | goto out; |
2710 | } | |
2711 | strip_newline(lxcpath); | |
2712 | strip_newline(lxcname); | |
2713 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { | |
2714 | ERROR("Unable to find dependent container %s:%s", | |
2715 | lxcpath, lxcname); | |
2716 | continue; | |
2717 | } | |
0ea055b3 CB |
2718 | if (!mod_rdep(p, c, inc)) |
2719 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 SH |
2720 | lxcpath, lxcname); |
2721 | lxc_container_put(p); | |
2722 | } | |
2723 | out: | |
f10fad2f ME |
2724 | free(lxcpath); |
2725 | free(lxcname); | |
dfb31b25 SH |
2726 | fclose(f); |
2727 | } | |
2728 | ||
18aa217b | 2729 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2730 | { |
0ea055b3 | 2731 | FILE *f; |
dfb31b25 SH |
2732 | char path[MAXPATHLEN]; |
2733 | int ret, v; | |
0ea055b3 | 2734 | struct stat fbuf; |
dfb31b25 SH |
2735 | bool bret = false; |
2736 | ||
2737 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
2738 | c->name); | |
2739 | if (ret < 0 || ret > MAXPATHLEN) | |
2740 | goto out; | |
0ea055b3 CB |
2741 | /* If the file doesn't exist there are no snapshots. */ |
2742 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2743 | goto out; |
0ea055b3 CB |
2744 | v = fbuf.st_size; |
2745 | if (v != 0) { | |
2746 | f = fopen(path, "r"); | |
2747 | if (!f) | |
2748 | goto out; | |
2749 | ret = fscanf(f, "%d", &v); | |
2750 | fclose(f); | |
1a0e70ac | 2751 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2752 | if (ret != 1) |
2753 | INFO("Container uses new lxc-snapshots format %s", path); | |
2754 | } | |
dfb31b25 SH |
2755 | bret = v != 0; |
2756 | ||
2757 | out: | |
2758 | return bret; | |
2759 | } | |
2760 | ||
18aa217b SH |
2761 | static bool has_snapshots(struct lxc_container *c) |
2762 | { | |
2763 | char path[MAXPATHLEN]; | |
74f96976 | 2764 | struct dirent *direntp; |
18aa217b SH |
2765 | int count=0; |
2766 | DIR *dir; | |
2767 | ||
2768 | if (!get_snappath_dir(c, path)) | |
2769 | return false; | |
2770 | dir = opendir(path); | |
2771 | if (!dir) | |
2772 | return false; | |
74f96976 | 2773 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2774 | if (!direntp) |
2775 | break; | |
2776 | ||
2777 | if (!strcmp(direntp->d_name, ".")) | |
2778 | continue; | |
2779 | ||
2780 | if (!strcmp(direntp->d_name, "..")) | |
2781 | continue; | |
2782 | count++; | |
2783 | break; | |
2784 | } | |
2785 | closedir(dir); | |
2786 | return count > 0; | |
2787 | } | |
2788 | ||
297c2d58 | 2789 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2790 | int ret; |
2791 | ||
e0010464 | 2792 | if (am_guest_unpriv()) { |
ee484f7f CB |
2793 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2794 | "storage_destroy_wrapper"); | |
2795 | if (ret < 0) | |
d028235d | 2796 | return false; |
ee484f7f | 2797 | |
d028235d SG |
2798 | return true; |
2799 | } | |
ee484f7f | 2800 | |
10bc1861 | 2801 | return storage_destroy(conf); |
297c2d58 CB |
2802 | } |
2803 | ||
4355ab5f SH |
2804 | static int lxc_rmdir_onedev_wrapper(void *data) |
2805 | { | |
2806 | char *arg = (char *) data; | |
18aa217b | 2807 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2808 | } |
2809 | ||
17a367d8 | 2810 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2811 | { |
17a367d8 CB |
2812 | char *arg = data; |
2813 | return unlink(arg); | |
2814 | } | |
2815 | ||
2816 | static bool container_destroy(struct lxc_container *c, | |
2817 | struct lxc_storage *storage) | |
2818 | { | |
2819 | const char *p1; | |
2820 | size_t len; | |
2821 | struct lxc_conf *conf; | |
2822 | char *path = NULL; | |
c868b261 | 2823 | bool bret = false; |
297c2d58 | 2824 | int ret = 0; |
72d0e1cb | 2825 | |
858377e4 | 2826 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2827 | return false; |
2828 | ||
a70a69e8 | 2829 | conf = c->lxc_conf; |
3bc449ed | 2830 | if (container_disk_lock(c)) |
72d0e1cb | 2831 | return false; |
72d0e1cb | 2832 | |
39dc698c | 2833 | if (!is_stopped(c)) { |
1a0e70ac | 2834 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2835 | ERROR("container %s is not stopped", c->name); |
2836 | goto out; | |
72d0e1cb SG |
2837 | } |
2838 | ||
a70a69e8 | 2839 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2840 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2841 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2842 | SYSERROR("Failed to set environment variable for container name"); |
2843 | ||
2844 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2845 | SYSERROR("Failed to set environment variable for config path"); | |
2846 | ||
2847 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2848 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2849 | ||
2850 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2851 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2852 | ||
2853 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2854 | SYSERROR("Failed to set environment variable for console path"); | |
2855 | ||
2856 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2857 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2858 | /* End of environment variable setup for hooks */ |
2859 | ||
14a7b0f9 | 2860 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2861 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2862 | goto out; |
2863 | } | |
2864 | } | |
2865 | ||
2866 | if (current_config && conf == current_config) { | |
858377e4 | 2867 | current_config = NULL; |
37cf711b SY |
2868 | if (conf->logfd != -1) { |
2869 | close(conf->logfd); | |
2870 | conf->logfd = -1; | |
858377e4 SH |
2871 | } |
2872 | } | |
2873 | ||
d028235d SG |
2874 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
2875 | if (!do_destroy_container(conf)) { | |
2876 | ERROR("Error destroying rootfs for %s", c->name); | |
2877 | goto out; | |
2878 | } | |
2879 | INFO("Destroyed rootfs for %s", c->name); | |
2880 | } | |
60bf62d4 | 2881 | |
dfb31b25 SH |
2882 | mod_all_rdeps(c, false); |
2883 | ||
17a367d8 CB |
2884 | p1 = do_lxcapi_get_config_path(c); |
2885 | /* strlen(p1) | |
2886 | * + | |
2887 | * / | |
2888 | * + | |
2889 | * strlen(c->name) | |
2890 | * + | |
2891 | * / | |
2892 | * + | |
2893 | * strlen("config") = 6 | |
2894 | * + | |
2895 | * \0 | |
2896 | */ | |
2897 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
2898 | path = malloc(len); | |
2899 | if (!path) { | |
2900 | ERROR("Failed to allocate memory"); | |
2901 | goto out; | |
2902 | } | |
2903 | ||
2904 | /* For an overlay container the rootfs is considered immutable and | |
2905 | * cannot be removed when restoring from a snapshot. | |
2906 | */ | |
2907 | if (storage && (!strcmp(storage->type, "overlay") || | |
2908 | !strcmp(storage->type, "overlayfs")) && | |
2909 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
2910 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
2911 | if (ret < 0 || (size_t)ret >= len) | |
2912 | goto out; | |
2913 | ||
e0010464 | 2914 | if (am_guest_unpriv()) |
17a367d8 CB |
2915 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
2916 | "lxc_unlink_exec_wrapper"); | |
2917 | else | |
2918 | ret = unlink(path); | |
2919 | if (ret < 0) { | |
2920 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
2921 | path, c->name); | |
2922 | goto out; | |
2923 | } | |
2924 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
2925 | ||
2926 | bret = true; | |
2927 | goto out; | |
2928 | } | |
2929 | ||
2930 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
2931 | if (ret < 0 || (size_t)ret >= len) | |
2932 | goto out; | |
e0010464 | 2933 | if (am_guest_unpriv()) |
ee484f7f CB |
2934 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
2935 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 2936 | else |
18aa217b | 2937 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 2938 | if (ret < 0) { |
17a367d8 CB |
2939 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
2940 | c->name); | |
60bf62d4 SH |
2941 | goto out; |
2942 | } | |
17a367d8 | 2943 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 2944 | |
fef48dc9 | 2945 | bret = true; |
60bf62d4 SH |
2946 | |
2947 | out: | |
17a367d8 CB |
2948 | if (path) |
2949 | free(path); | |
3bc449ed | 2950 | container_disk_unlock(c); |
fef48dc9 | 2951 | return bret; |
72d0e1cb SG |
2952 | } |
2953 | ||
858377e4 | 2954 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
2955 | { |
2956 | if (!c || !lxcapi_is_defined(c)) | |
2957 | return false; | |
2958 | if (has_snapshots(c)) { | |
2959 | ERROR("Container %s has snapshots; not removing", c->name); | |
2960 | return false; | |
2961 | } | |
2962 | ||
2963 | if (has_fs_snapshots(c)) { | |
2964 | ERROR("container %s has snapshots on its rootfs", c->name); | |
2965 | return false; | |
2966 | } | |
2967 | ||
17a367d8 | 2968 | return container_destroy(c, NULL); |
18aa217b SH |
2969 | } |
2970 | ||
858377e4 | 2971 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 2972 | |
858377e4 | 2973 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
2974 | { |
2975 | if (!c || !lxcapi_is_defined(c)) | |
2976 | return false; | |
2977 | if (!lxcapi_snapshot_destroy_all(c)) { | |
2978 | ERROR("Error deleting all snapshots"); | |
2979 | return false; | |
2980 | } | |
2981 | return lxcapi_destroy(c); | |
2982 | } | |
2983 | ||
858377e4 SH |
2984 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
2985 | ||
0d9cd9c3 CB |
2986 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
2987 | const char *v) | |
96532523 | 2988 | { |
0d9cd9c3 | 2989 | int ret; |
96532523 | 2990 | struct lxc_config_t *config; |
0d9cd9c3 CB |
2991 | bool bret = true; |
2992 | ||
2993 | config = lxc_get_config(key); | |
2994 | if (!config) | |
2995 | return -EINVAL; | |
2996 | ||
2997 | ret = config->set(key, v, conf, NULL); | |
2998 | if (ret < 0) | |
2999 | return -EINVAL; | |
3000 | ||
3001 | if (lxc_config_value_empty(v)) | |
3002 | do_clear_unexp_config_line(conf, key); | |
3003 | else | |
3004 | bret = do_append_unexp_config_line(conf, key, v); | |
3005 | if (!bret) | |
3006 | return -ENOMEM; | |
3007 | ||
3008 | return 0; | |
3009 | } | |
3010 | ||
3011 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3012 | const char *v) | |
3013 | { | |
3014 | int ret; | |
96532523 SH |
3015 | |
3016 | if (!c->lxc_conf) | |
3017 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3018 | |
6b0d5538 | 3019 | if (!c->lxc_conf) |
96532523 | 3020 | return false; |
4222a9f4 | 3021 | |
0d9cd9c3 CB |
3022 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3023 | if (ret < 0) | |
f979ac15 | 3024 | return false; |
4222a9f4 | 3025 | |
0d9cd9c3 | 3026 | return true; |
96532523 SH |
3027 | } |
3028 | ||
858377e4 | 3029 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3030 | { |
72d0e1cb | 3031 | bool b = false; |
72d0e1cb SG |
3032 | |
3033 | if (!c) | |
3034 | return false; | |
3035 | ||
5cee8c50 | 3036 | if (container_mem_lock(c)) |
72d0e1cb SG |
3037 | return false; |
3038 | ||
0d9cd9c3 | 3039 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3040 | |
5cee8c50 | 3041 | container_mem_unlock(c); |
72d0e1cb SG |
3042 | return b; |
3043 | } | |
3044 | ||
858377e4 SH |
3045 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3046 | ||
72d0e1cb SG |
3047 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3048 | { | |
3049 | if (!c || !c->configfile) | |
3050 | return NULL; | |
3051 | return strdup(c->configfile); | |
3052 | } | |
3053 | ||
2a59a681 SH |
3054 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3055 | { | |
3056 | if (!c || !c->config_path) | |
3057 | return NULL; | |
3058 | return (const char *)(c->config_path); | |
3059 | } | |
3060 | ||
afeecbba SH |
3061 | /* |
3062 | * not for export | |
3063 | * Just recalculate the c->configfile based on the | |
3064 | * c->config_path, which must be set. | |
3065 | * The lxc_container must be locked or not yet public. | |
3066 | */ | |
3067 | static bool set_config_filename(struct lxc_container *c) | |
3068 | { | |
3069 | char *newpath; | |
3070 | int len, ret; | |
3071 | ||
3072 | if (!c->config_path) | |
3073 | return false; | |
3074 | ||
3075 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3076 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3077 | newpath = malloc(len); | |
3078 | if (!newpath) | |
3079 | return false; | |
3080 | ||
3081 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3082 | if (ret < 0 || ret >= len) { | |
3083 | fprintf(stderr, "Error printing out config file name\n"); | |
3084 | free(newpath); | |
3085 | return false; | |
3086 | } | |
3087 | ||
f10fad2f | 3088 | free(c->configfile); |
afeecbba SH |
3089 | c->configfile = newpath; |
3090 | ||
3091 | return true; | |
3092 | } | |
3093 | ||
858377e4 | 3094 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3095 | { |
3096 | char *p; | |
3097 | bool b = false; | |
afeecbba | 3098 | char *oldpath = NULL; |
2a59a681 SH |
3099 | |
3100 | if (!c) | |
3101 | return b; | |
3102 | ||
5cee8c50 | 3103 | if (container_mem_lock(c)) |
2a59a681 SH |
3104 | return b; |
3105 | ||
3106 | p = strdup(path); | |
afeecbba SH |
3107 | if (!p) { |
3108 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3109 | goto err; |
afeecbba SH |
3110 | } |
3111 | ||
2a59a681 SH |
3112 | b = true; |
3113 | if (c->config_path) | |
afeecbba | 3114 | oldpath = c->config_path; |
2a59a681 | 3115 | c->config_path = p; |
afeecbba SH |
3116 | |
3117 | /* Since we've changed the config path, we have to change the | |
3118 | * config file name too */ | |
3119 | if (!set_config_filename(c)) { | |
3120 | ERROR("Out of memory setting new config filename"); | |
3121 | b = false; | |
3122 | free(c->config_path); | |
3123 | c->config_path = oldpath; | |
3124 | oldpath = NULL; | |
3125 | } | |
2a59a681 | 3126 | err: |
f10fad2f | 3127 | free(oldpath); |
5cee8c50 | 3128 | container_mem_unlock(c); |
2a59a681 SH |
3129 | return b; |
3130 | } | |
3131 | ||
858377e4 | 3132 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3133 | |
858377e4 | 3134 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3135 | { |
3136 | int ret; | |
794dd120 SH |
3137 | |
3138 | if (!c) | |
3139 | return false; | |
3140 | ||
3bc449ed | 3141 | if (is_stopped(c)) |
794dd120 SH |
3142 | return false; |
3143 | ||
3bc449ed SH |
3144 | if (container_disk_lock(c)) |
3145 | return false; | |
794dd120 | 3146 | |
33ad9f1a | 3147 | ret = lxc_cgroup_set(subsys, value, c->name, c->config_path); |
3bc449ed SH |
3148 | |
3149 | container_disk_unlock(c); | |
3150 | return ret == 0; | |
794dd120 SH |
3151 | } |
3152 | ||
858377e4 SH |
3153 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3154 | ||
3155 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3156 | { |
3bc449ed | 3157 | int ret; |
794dd120 | 3158 | |
6502006a | 3159 | if (!c) |
794dd120 SH |
3160 | return -1; |
3161 | ||
3bc449ed | 3162 | if (is_stopped(c)) |
794dd120 SH |
3163 | return -1; |
3164 | ||
3bc449ed SH |
3165 | if (container_disk_lock(c)) |
3166 | return -1; | |
794dd120 | 3167 | |
33ad9f1a | 3168 | ret = lxc_cgroup_get(subsys, retv, inlen, c->name, c->config_path); |
794dd120 | 3169 | |
3bc449ed | 3170 | container_disk_unlock(c); |
794dd120 SH |
3171 | return ret; |
3172 | } | |
3173 | ||
858377e4 SH |
3174 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3175 | ||
593e8478 | 3176 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3177 | { |
593e8478 | 3178 | return lxc_global_config_value(key); |
a8428dfa SH |
3179 | } |
3180 | ||
b6b918a1 SG |
3181 | const char *lxc_get_version(void) |
3182 | { | |
95ee490b | 3183 | return LXC_VERSION; |
b6b918a1 SG |
3184 | } |
3185 | ||
f0ca2726 | 3186 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3187 | { |
3188 | int in, out; | |
3189 | ssize_t len, ret; | |
3190 | char buf[8096]; | |
3191 | struct stat sbuf; | |
3192 | ||
3193 | if (file_exists(new)) { | |
3194 | ERROR("copy destination %s exists", new); | |
3195 | return -1; | |
3196 | } | |
3197 | ret = stat(old, &sbuf); | |
3198 | if (ret < 0) { | |
dfb31b25 | 3199 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3200 | return -1; |
3201 | } | |
3202 | ||
3203 | in = open(old, O_RDONLY); | |
3204 | if (in < 0) { | |
dfb31b25 | 3205 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3206 | return -1; |
3207 | } | |
3208 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); | |
3209 | if (out < 0) { | |
dfb31b25 | 3210 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3211 | close(in); |
3212 | return -1; | |
3213 | } | |
3214 | ||
3215 | while (1) { | |
3216 | len = read(in, buf, 8096); | |
3217 | if (len < 0) { | |
dfb31b25 | 3218 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3219 | goto err; |
3220 | } | |
3221 | if (len == 0) | |
3222 | break; | |
3223 | ret = write(out, buf, len); | |
1a0e70ac | 3224 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3225 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3226 | goto err; |
3227 | } | |
3228 | } | |
3229 | close(in); | |
3230 | close(out); | |
3231 | ||
1a0e70ac | 3232 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3233 | ret = chmod(new, sbuf.st_mode); |
3234 | if (ret) { | |
dfb31b25 | 3235 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3236 | return -1; |
3237 | } | |
3238 | ||
3239 | return 0; | |
3240 | ||
3241 | err: | |
3242 | close(in); | |
3243 | close(out); | |
3244 | return -1; | |
3245 | } | |
3246 | ||
9be53773 SH |
3247 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3248 | { | |
619256b5 | 3249 | int i, len, ret; |
9be53773 | 3250 | struct lxc_list *it; |
619256b5 ÇO |
3251 | char *cpath; |
3252 | ||
3253 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
3254 | cpath = alloca(len); | |
3255 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); | |
3256 | if (ret < 0 || ret >= len) | |
3257 | return -1; | |
9be53773 SH |
3258 | |
3259 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3260 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3261 | char *hookname = it->elem; | |
c32981c3 | 3262 | char *fname = strrchr(hookname, '/'); |
9be53773 | 3263 | char tmppath[MAXPATHLEN]; |
1a0e70ac | 3264 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3265 | return 0; |
619256b5 | 3266 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3267 | /* this hook is public - ignore */ |
619256b5 ÇO |
3268 | continue; |
3269 | } | |
1a0e70ac | 3270 | /* copy the script, and change the entry in confile */ |
9be53773 SH |
3271 | ret = snprintf(tmppath, MAXPATHLEN, "%s/%s/%s", |
3272 | c->config_path, c->name, fname+1); | |
3273 | if (ret < 0 || ret >= MAXPATHLEN) | |
3274 | return -1; | |
3275 | ret = copy_file(it->elem, tmppath); | |
3276 | if (ret < 0) | |
3277 | return -1; | |
3278 | free(it->elem); | |
3279 | it->elem = strdup(tmppath); | |
3280 | if (!it->elem) { | |
3281 | ERROR("out of memory copying hook path"); | |
3282 | return -1; | |
3283 | } | |
9be53773 SH |
3284 | } |
3285 | } | |
3286 | ||
67702c21 SH |
3287 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3288 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3289 | ERROR("Error saving new hooks in clone"); |
3290 | return -1; | |
3291 | } | |
858377e4 | 3292 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3293 | return 0; |
3294 | } | |
3295 | ||
9be53773 SH |
3296 | |
3297 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3298 | { | |
3299 | char newpath[MAXPATHLEN]; | |
3300 | char *oldpath = oldc->lxc_conf->fstab; | |
3301 | int ret; | |
3302 | ||
3303 | if (!oldpath) | |
3304 | return 0; | |
3305 | ||
47148e96 CB |
3306 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3307 | ||
c32981c3 | 3308 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3309 | if (!p) |
3310 | return -1; | |
3311 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s%s", | |
3312 | c->config_path, c->name, p); | |
3313 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3314 | ERROR("error printing new path for %s", oldpath); | |
3315 | return -1; | |
3316 | } | |
3317 | if (file_exists(newpath)) { | |
3318 | ERROR("error: fstab file %s exists", newpath); | |
3319 | return -1; | |
3320 | } | |
3321 | ||
3322 | if (copy_file(oldpath, newpath) < 0) { | |
3323 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3324 | return -1; | |
3325 | } | |
3326 | free(c->lxc_conf->fstab); | |
3327 | c->lxc_conf->fstab = strdup(newpath); | |
3328 | if (!c->lxc_conf->fstab) { | |
3329 | ERROR("error: allocating pathname"); | |
3330 | return -1; | |
3331 | } | |
47148e96 | 3332 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3333 | ERROR("error saving new lxctab"); |
3334 | return -1; | |
3335 | } | |
9be53773 SH |
3336 | |
3337 | return 0; | |
3338 | } | |
3339 | ||
dfb31b25 SH |
3340 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3341 | { | |
3342 | char path0[MAXPATHLEN], path1[MAXPATHLEN]; | |
3343 | int ret; | |
3344 | ||
3345 | ret = snprintf(path0, MAXPATHLEN, "%s/%s/lxc_rdepends", c0->config_path, | |
3346 | c0->name); | |
3347 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3348 | WARN("Error copying reverse dependencies"); | |
3349 | return; | |
3350 | } | |
3351 | ret = snprintf(path1, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
3352 | c->name); | |
3353 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3354 | WARN("Error copying reverse dependencies"); | |
3355 | return; | |
3356 | } | |
3357 | if (copy_file(path0, path1) < 0) { | |
3358 | INFO("Error copying reverse dependencies"); | |
3359 | return; | |
3360 | } | |
3361 | } | |
3362 | ||
3363 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3364 | { | |
3365 | int ret; | |
3366 | char path[MAXPATHLEN]; | |
3367 | FILE *f; | |
3368 | bool bret; | |
3369 | ||
3370 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
3371 | c->name); | |
3372 | if (ret < 0 || ret >= MAXPATHLEN) | |
3373 | return false; | |
3374 | f = fopen(path, "a"); | |
3375 | if (!f) | |
3376 | return false; | |
3377 | bret = true; | |
1a0e70ac | 3378 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3379 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3380 | bret = false; | |
3381 | if (fclose(f) != 0) | |
3382 | bret = false; | |
3383 | return bret; | |
3384 | } | |
3385 | ||
15a90a10 SH |
3386 | /* |
3387 | * If the fs natively supports snapshot clones with no penalty, | |
3388 | * then default to those even if not requested. | |
3389 | * Currently we only do this for btrfs. | |
3390 | */ | |
3391 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3392 | struct lxc_container *c1) | |
3393 | { | |
3394 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; | |
3395 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
3396 | char *p0 = alloca(l0 + 1); | |
3397 | char *p1 = alloca(l1 + 1); | |
6e0fa6a0 | 3398 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 SH |
3399 | |
3400 | snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); | |
3401 | snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
9a09badc CB |
3402 | |
3403 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3404 | return false; | |
3405 | ||
6e0fa6a0 CB |
3406 | if (is_btrfs_subvol(rootfs) <= 0) |
3407 | return false; | |
3408 | ||
15a90a10 SH |
3409 | return btrfs_same_fs(p0, p1) == 0; |
3410 | } | |
3411 | ||
9be53773 | 3412 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3413 | const char *newtype, int flags, const char *bdevdata, |
3414 | uint64_t newsize) | |
9be53773 | 3415 | { |
10bc1861 | 3416 | struct lxc_storage *bdev; |
07db51a2 | 3417 | bool need_rdep; |
9be53773 | 3418 | |
15a90a10 SH |
3419 | if (should_default_to_snapshot(c0, c)) |
3420 | flags |= LXC_CLONE_SNAPSHOT; | |
3421 | ||
10bc1861 CB |
3422 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3423 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3424 | if (!bdev) { |
763429b6 | 3425 | ERROR("Error copying storage."); |
9be53773 SH |
3426 | return -1; |
3427 | } | |
763429b6 CB |
3428 | |
3429 | /* Set new rootfs. */ | |
9be53773 SH |
3430 | free(c->lxc_conf->rootfs.path); |
3431 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3432 | storage_put(bdev); |
763429b6 | 3433 | |
dfb31b25 | 3434 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3435 | ERROR("Out of memory while setting storage path."); |
3436 | return -1; | |
3437 | } | |
763429b6 | 3438 | |
7a96a068 CB |
3439 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3440 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3441 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3442 | c->lxc_conf->rootfs.path)) { |
3443 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3444 | return -1; |
3445 | } | |
763429b6 | 3446 | |
eee59f94 SH |
3447 | if (flags & LXC_CLONE_SNAPSHOT) |
3448 | copy_rdepends(c, c0); | |
dfb31b25 SH |
3449 | if (need_rdep) { |
3450 | if (!add_rdepends(c, c0)) | |
3451 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3452 | c->name, c0->name); |
dfb31b25 SH |
3453 | } |
3454 | ||
3455 | mod_all_rdeps(c, true); | |
3456 | ||
9be53773 SH |
3457 | return 0; |
3458 | } | |
3459 | ||
1354955b SH |
3460 | struct clone_update_data { |
3461 | struct lxc_container *c0; | |
3462 | struct lxc_container *c1; | |
3463 | int flags; | |
3464 | char **hookargs; | |
3465 | }; | |
3466 | ||
3467 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3468 | { |
1354955b SH |
3469 | struct lxc_container *c0 = data->c0; |
3470 | struct lxc_container *c = data->c1; | |
3471 | int flags = data->flags; | |
3472 | char **hookargs = data->hookargs; | |
9be53773 SH |
3473 | int ret = -1; |
3474 | char path[MAXPATHLEN]; | |
10bc1861 | 3475 | struct lxc_storage *bdev; |
9be53773 | 3476 | FILE *fout; |
148e91f5 | 3477 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3478 | |
3479 | /* update hostname in rootfs */ | |
3480 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3481 | ||
1354955b SH |
3482 | if (setgid(0) < 0) { |
3483 | ERROR("Failed to setgid to 0"); | |
3484 | return -1; | |
3485 | } | |
3486 | if (setuid(0) < 0) { | |
3487 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3488 | return -1; |
1354955b | 3489 | } |
c476bdce SH |
3490 | if (setgroups(0, NULL) < 0) |
3491 | WARN("Failed to clear groups"); | |
9be53773 | 3492 | |
1354955b SH |
3493 | if (unshare(CLONE_NEWNS) < 0) |
3494 | return -1; | |
8a388ed4 | 3495 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3496 | if (!bdev) |
1354955b | 3497 | return -1; |
cf3ef16d SH |
3498 | if (strcmp(bdev->type, "dir") != 0) { |
3499 | if (unshare(CLONE_NEWNS) < 0) { | |
3500 | ERROR("error unsharing mounts"); | |
10bc1861 | 3501 | storage_put(bdev); |
1354955b | 3502 | return -1; |
cf3ef16d | 3503 | } |
2c6f3fc9 SH |
3504 | if (detect_shared_rootfs()) { |
3505 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3506 | SYSERROR("Failed to make / rslave"); | |
3507 | ERROR("Continuing..."); | |
3508 | } | |
3509 | } | |
e7de366c | 3510 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3511 | storage_put(bdev); |
1354955b | 3512 | return -1; |
e7de366c | 3513 | } |
1a0e70ac | 3514 | } else { /* TODO come up with a better way */ |
f10fad2f | 3515 | free(bdev->dest); |
cf3ef16d SH |
3516 | bdev->dest = strdup(bdev->src); |
3517 | } | |
148e91f5 SH |
3518 | |
3519 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3520 | /* Start of environment variable setup for hooks */ | |
ab7efcf5 | 3521 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) { |
1143ed39 DE |
3522 | SYSERROR("failed to set environment variable for source container name"); |
3523 | } | |
cb8ff4d0 | 3524 | if (setenv("LXC_NAME", c->name, 1)) { |
148e91f5 SH |
3525 | SYSERROR("failed to set environment variable for container name"); |
3526 | } | |
ab7efcf5 | 3527 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { |
148e91f5 SH |
3528 | SYSERROR("failed to set environment variable for config path"); |
3529 | } | |
ab7efcf5 | 3530 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) { |
148e91f5 SH |
3531 | SYSERROR("failed to set environment variable for rootfs mount"); |
3532 | } | |
ab7efcf5 | 3533 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { |
148e91f5 SH |
3534 | SYSERROR("failed to set environment variable for rootfs mount"); |
3535 | } | |
3536 | ||
14a7b0f9 | 3537 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3538 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3539 | storage_put(bdev); |
1354955b | 3540 | return -1; |
148e91f5 SH |
3541 | } |
3542 | } | |
3543 | ||
3544 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
3545 | ret = snprintf(path, MAXPATHLEN, "%s/etc/hostname", bdev->dest); | |
10bc1861 | 3546 | storage_put(bdev); |
e7de366c | 3547 | |
148e91f5 | 3548 | if (ret < 0 || ret >= MAXPATHLEN) |
1354955b | 3549 | return -1; |
8058be39 | 3550 | if (!file_exists(path)) |
1354955b | 3551 | return 0; |
148e91f5 | 3552 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3553 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3554 | return 0; |
148e91f5 | 3555 | } |
a684f0b7 ÇO |
3556 | if (fprintf(fout, "%s", c->name) < 0) { |
3557 | fclose(fout); | |
1354955b | 3558 | return -1; |
6849cb5b | 3559 | } |
148e91f5 | 3560 | if (fclose(fout) < 0) |
1354955b | 3561 | return -1; |
10bc1861 CB |
3562 | } else { |
3563 | storage_put(bdev); | |
9be53773 | 3564 | } |
e7de366c | 3565 | |
1354955b SH |
3566 | return 0; |
3567 | } | |
3568 | ||
3569 | static int clone_update_rootfs_wrapper(void *data) | |
3570 | { | |
3571 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3572 | return clone_update_rootfs(arg); | |
9be53773 SH |
3573 | } |
3574 | ||
3575 | /* | |
3576 | * We want to support: | |
3577 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3578 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3579 | ||
ba115175 CB |
3580 | -s [ implies overlay] |
3581 | -s -B overlay | |
9be53773 SH |
3582 | |
3583 | only rootfs gets converted (copied/snapshotted) on clone. | |
3584 | */ | |
3585 | ||
d5752559 | 3586 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3587 | { |
c32981c3 | 3588 | char *p = strrchr(path, '/'); |
d5752559 | 3589 | int ret = -1; |
9be53773 SH |
3590 | |
3591 | if (!p) | |
3592 | return -1; | |
3593 | *p = '\0'; | |
d028235d | 3594 | ret = do_create_container_dir(path, conf); |
9be53773 SH |
3595 | *p = '/'; |
3596 | return ret; | |
3597 | } | |
3598 | ||
858377e4 | 3599 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3600 | const char *lxcpath, int flags, |
d659597e | 3601 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3602 | char **hookargs) |
9be53773 | 3603 | { |
9be53773 | 3604 | char newpath[MAXPATHLEN]; |
0e1a60b0 | 3605 | int fd, ret; |
1354955b | 3606 | struct clone_update_data data; |
3b392519 | 3607 | size_t saved_unexp_len; |
1354955b | 3608 | pid_t pid; |
17a367d8 CB |
3609 | int storage_copied = 0; |
3610 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3611 | struct lxc_container *c2 = NULL; | |
9be53773 | 3612 | |
858377e4 | 3613 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3614 | return NULL; |
3615 | ||
5cee8c50 | 3616 | if (container_mem_lock(c)) |
9be53773 SH |
3617 | return NULL; |
3618 | ||
39dc698c | 3619 | if (!is_stopped(c)) { |
9be53773 SH |
3620 | ERROR("error: Original container (%s) is running", c->name); |
3621 | goto out; | |
3622 | } | |
3623 | ||
1a0e70ac | 3624 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3625 | if (!newname) |
3626 | newname = c->name; | |
3627 | if (!lxcpath) | |
858377e4 | 3628 | lxcpath = do_lxcapi_get_config_path(c); |
05d53f4c | 3629 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/config", lxcpath, newname); |
6849cb5b | 3630 | if (ret < 0 || ret >= MAXPATHLEN) { |
9be53773 SH |
3631 | SYSERROR("clone: failed making config pathname"); |
3632 | goto out; | |
3633 | } | |
17a367d8 | 3634 | |
9be53773 SH |
3635 | if (file_exists(newpath)) { |
3636 | ERROR("error: clone: %s exists", newpath); | |
3637 | goto out; | |
3638 | } | |
3639 | ||
d5752559 | 3640 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3641 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3642 | ERROR("Error creating container dir for %s", newpath); |
3643 | goto out; | |
3644 | } | |
3645 | ||
1a0e70ac | 3646 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3647 | if (c->lxc_conf->rootfs.path) { |
3648 | origroot = c->lxc_conf->rootfs.path; | |
3649 | c->lxc_conf->rootfs.path = NULL; | |
3650 | } | |
0e1a60b0 CB |
3651 | |
3652 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
3653 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
3654 | if (fd < 0) { | |
3655 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3656 | goto out; |
3657 | } | |
5eea90e8 SH |
3658 | |
3659 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3660 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3661 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3662 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3663 | close(fd); |
5eea90e8 SH |
3664 | goto out; |
3665 | } | |
7a96a068 | 3666 | |
7a96a068 | 3667 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3668 | write_config(fd, c->lxc_conf); |
3669 | close(fd); | |
8d2efe40 | 3670 | c->lxc_conf->rootfs.path = origroot; |
5eea90e8 SH |
3671 | free(c->lxc_conf->unexpanded_config); |
3672 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3673 | saved_unexp_conf = NULL; | |
3b392519 | 3674 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3675 | |
90b366fc CB |
3676 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/rootfs", lxcpath, newname); |
3677 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3678 | SYSERROR("clone: failed making rootfs pathname"); | |
3679 | goto out; | |
3680 | } | |
17a367d8 CB |
3681 | |
3682 | ret = mkdir(newpath, 0755); | |
3683 | if (ret < 0) { | |
3684 | /* For an overlay container the rootfs is considered immutable | |
3685 | * and will not have been removed when restoring from a | |
3686 | * snapshot. | |
3687 | */ | |
3688 | if (errno != ENOENT && | |
3689 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3690 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3691 | goto out; | |
3692 | } | |
9be53773 SH |
3693 | } |
3694 | ||
e0010464 | 3695 | if (am_guest_unpriv()) { |
1354955b | 3696 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3697 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3698 | goto out; |
3699 | } | |
3700 | } | |
3701 | ||
05d53f4c | 3702 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3703 | if (!c2) { |
05d53f4c SH |
3704 | ERROR("clone: failed to create new container (%s %s)", newname, |
3705 | lxcpath); | |
9be53773 SH |
3706 | goto out; |
3707 | } | |
8d2efe40 | 3708 | |
1a0e70ac | 3709 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3710 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3711 | if (ret < 0) | |
3712 | goto out; | |
9be53773 | 3713 | |
6b0d5538 | 3714 | |
1a0e70ac | 3715 | /* update utsname */ |
3d7ad474 CB |
3716 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3717 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3718 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3719 | |
0d9cd9c3 | 3720 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3721 | ERROR("Error setting new hostname"); |
3722 | goto out; | |
3723 | } | |
96532523 SH |
3724 | } |
3725 | ||
1a0e70ac | 3726 | /* copy hooks */ |
619256b5 ÇO |
3727 | ret = copyhooks(c, c2); |
3728 | if (ret < 0) { | |
3729 | ERROR("error copying hooks"); | |
3730 | goto out; | |
9be53773 SH |
3731 | } |
3732 | ||
3733 | if (copy_fstab(c, c2) < 0) { | |
3734 | ERROR("error copying fstab"); | |
9be53773 SH |
3735 | goto out; |
3736 | } | |
3737 | ||
1a0e70ac | 3738 | /* update macaddrs */ |
6b0d5538 | 3739 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3740 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3741 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3742 | goto out; |
3743 | } | |
3744 | } | |
9be53773 | 3745 | |
1a0e70ac | 3746 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3747 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3748 | goto out; |
3749 | ||
1a0e70ac CB |
3750 | /* We've now successfully created c2's storage, so clear it out if we |
3751 | * fail after this. | |
3752 | */ | |
176d9acb SH |
3753 | storage_copied = 1; |
3754 | ||
375c2258 | 3755 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3756 | goto out; |
9be53773 | 3757 | |
1354955b SH |
3758 | if ((pid = fork()) < 0) { |
3759 | SYSERROR("fork"); | |
9be53773 | 3760 | goto out; |
1354955b SH |
3761 | } |
3762 | if (pid > 0) { | |
3763 | ret = wait_for_pid(pid); | |
3764 | if (ret) | |
3765 | goto out; | |
3766 | container_mem_unlock(c); | |
3767 | return c2; | |
3768 | } | |
3769 | data.c0 = c; | |
3770 | data.c1 = c2; | |
3771 | data.flags = flags; | |
3772 | data.hookargs = hookargs; | |
e0010464 | 3773 | if (am_guest_unpriv()) |
ee484f7f CB |
3774 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3775 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3776 | else |
3777 | ret = clone_update_rootfs(&data); | |
3778 | if (ret < 0) | |
d8480a31 | 3779 | _exit(EXIT_FAILURE); |
9be53773 | 3780 | |
5cee8c50 | 3781 | container_mem_unlock(c); |
d8480a31 | 3782 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3783 | |
3784 | out: | |
5cee8c50 | 3785 | container_mem_unlock(c); |
375c2258 | 3786 | if (c2) { |
176d9acb SH |
3787 | if (!storage_copied) |
3788 | c2->lxc_conf->rootfs.path = NULL; | |
375c2258 | 3789 | c2->destroy(c2); |
9be53773 | 3790 | lxc_container_put(c2); |
375c2258 | 3791 | } |
9be53773 SH |
3792 | |
3793 | return NULL; | |
3794 | } | |
3795 | ||
858377e4 SH |
3796 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3797 | const char *lxcpath, int flags, | |
3798 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3799 | char **hookargs) | |
3800 | { | |
3801 | struct lxc_container * ret; | |
3802 | current_config = c ? c->lxc_conf : NULL; | |
3803 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
3804 | current_config = NULL; | |
3805 | return ret; | |
3806 | } | |
3807 | ||
3808 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 3809 | { |
10bc1861 | 3810 | struct lxc_storage *bdev; |
06e5650e | 3811 | struct lxc_container *newc; |
06e5650e | 3812 | |
d693cf93 | 3813 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
3814 | return false; |
3815 | ||
18aa217b SH |
3816 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
3817 | ERROR("Renaming a container with snapshots is not supported"); | |
3818 | return false; | |
3819 | } | |
8a388ed4 | 3820 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
3821 | if (!bdev) { |
3822 | ERROR("Failed to find original backing store type"); | |
3823 | return false; | |
3824 | } | |
3825 | ||
619256b5 | 3826 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 3827 | storage_put(bdev); |
06e5650e ÇO |
3828 | if (!newc) { |
3829 | lxc_container_put(newc); | |
3830 | return false; | |
3831 | } | |
3832 | ||
3833 | if (newc && lxcapi_is_defined(newc)) | |
3834 | lxc_container_put(newc); | |
3835 | ||
17a367d8 | 3836 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
3837 | ERROR("Could not destroy existing container %s", c->name); |
3838 | return false; | |
3839 | } | |
3840 | return true; | |
3841 | } | |
3842 | ||
858377e4 SH |
3843 | WRAP_API_1(bool, lxcapi_rename, const char *) |
3844 | ||
a0e93eeb CS |
3845 | static int lxcapi_attach(struct lxc_container *c, lxc_attach_exec_t exec_function, void *exec_payload, lxc_attach_options_t *options, pid_t *attached_process) |
3846 | { | |
858377e4 SH |
3847 | int ret; |
3848 | ||
a0e93eeb CS |
3849 | if (!c) |
3850 | return -1; | |
3851 | ||
858377e4 SH |
3852 | current_config = c->lxc_conf; |
3853 | ||
3854 | ret = lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
3855 | current_config = NULL; | |
3856 | return ret; | |
a0e93eeb CS |
3857 | } |
3858 | ||
858377e4 | 3859 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
a0e93eeb CS |
3860 | { |
3861 | lxc_attach_command_t command; | |
3862 | pid_t pid; | |
3863 | int r; | |
3864 | ||
3865 | if (!c) | |
3866 | return -1; | |
3867 | ||
3868 | command.program = (char*)program; | |
3869 | command.argv = (char**)argv; | |
3870 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); | |
3871 | if (r < 0) { | |
3872 | ERROR("ups"); | |
3873 | return r; | |
3874 | } | |
3875 | return lxc_wait_for_pid_status(pid); | |
3876 | } | |
3877 | ||
858377e4 SH |
3878 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
3879 | { | |
3880 | int ret; | |
3881 | current_config = c ? c->lxc_conf : NULL; | |
3882 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
3883 | current_config = NULL; | |
3884 | return ret; | |
3885 | } | |
3886 | ||
74a3920a | 3887 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 SH |
3888 | { |
3889 | char *fname; | |
3890 | struct stat sb; | |
3891 | int i = 0, ret; | |
3892 | ||
3893 | fname = alloca(strlen(lxcpath) + 20); | |
3894 | while (1) { | |
3895 | sprintf(fname, "%s/snap%d", lxcpath, i); | |
3896 | ret = stat(fname, &sb); | |
3897 | if (ret != 0) | |
3898 | return i; | |
3899 | i++; | |
3900 | } | |
3901 | } | |
3902 | ||
18aa217b SH |
3903 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
3904 | { | |
3905 | int ret; | |
3906 | /* | |
3907 | * If the old style snapshot path exists, use it | |
3908 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
3909 | */ | |
3910 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps", c->config_path); | |
3911 | if (ret < 0 || ret >= MAXPATHLEN) | |
3912 | return false; | |
3913 | if (dir_exists(snappath)) { | |
3914 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps/%s", c->config_path, c->name); | |
3915 | if (ret < 0 || ret >= MAXPATHLEN) | |
3916 | return false; | |
3917 | return true; | |
3918 | } | |
3919 | ||
3920 | /* | |
3921 | * Use the new style path | |
3922 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
3923 | */ | |
3924 | ret = snprintf(snappath, MAXPATHLEN, "%s/%s/snaps", c->config_path, c->name); | |
3925 | if (ret < 0 || ret >= MAXPATHLEN) | |
3926 | return false; | |
3927 | return true; | |
3928 | } | |
3929 | ||
858377e4 | 3930 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 SH |
3931 | { |
3932 | int i, flags, ret; | |
3933 | struct lxc_container *c2; | |
3934 | char snappath[MAXPATHLEN], newname[20]; | |
3935 | ||
840f05df SH |
3936 | if (!c || !lxcapi_is_defined(c)) |
3937 | return -1; | |
3938 | ||
10bc1861 | 3939 | if (!storage_can_backup(c->lxc_conf)) { |
cdd01be2 SH |
3940 | ERROR("%s's backing store cannot be backed up.", c->name); |
3941 | ERROR("Your container must use another backing store type."); | |
3942 | return -1; | |
3943 | } | |
3944 | ||
18aa217b | 3945 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 3946 | return -1; |
18aa217b | 3947 | |
f5dd1d53 SH |
3948 | i = get_next_index(snappath, c->name); |
3949 | ||
3950 | if (mkdir_p(snappath, 0755) < 0) { | |
3951 | ERROR("Failed to create snapshot directory %s", snappath); | |
3952 | return -1; | |
3953 | } | |
3954 | ||
3955 | ret = snprintf(newname, 20, "snap%d", i); | |
3956 | if (ret < 0 || ret >= 20) | |
3957 | return -1; | |
3958 | ||
0a83cbbb SH |
3959 | /* |
3960 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
3961 | * created in the original container | |
3962 | */ | |
3963 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
3964 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 3965 | if (storage_is_dir(c->lxc_conf)) { |
8c39f7a4 SH |
3966 | ERROR("Snapshot of directory-backed container requested."); |
3967 | ERROR("Making a copy-clone. If you do want snapshots, then"); | |
12e6ab5d | 3968 | ERROR("please create overlay clone first, snapshot that"); |
8c39f7a4 SH |
3969 | ERROR("and keep the original container pristine."); |
3970 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
3971 | } | |
858377e4 | 3972 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 3973 | if (!c2) { |
959aee9c | 3974 | ERROR("clone of %s:%s failed", c->config_path, c->name); |
f5dd1d53 SH |
3975 | return -1; |
3976 | } | |
3977 | ||
3978 | lxc_container_put(c2); | |
3979 | ||
1a0e70ac | 3980 | /* Now write down the creation time. */ |
f5dd1d53 SH |
3981 | time_t timer; |
3982 | char buffer[25]; | |
3983 | struct tm* tm_info; | |
025ed0f3 | 3984 | FILE *f; |
f5dd1d53 SH |
3985 | |
3986 | time(&timer); | |
3987 | tm_info = localtime(&timer); | |
3988 | ||
3989 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", tm_info); | |
3990 | ||
3991 | char *dfnam = alloca(strlen(snappath) + strlen(newname) + 5); | |
3992 | sprintf(dfnam, "%s/%s/ts", snappath, newname); | |
025ed0f3 | 3993 | f = fopen(dfnam, "w"); |
f5dd1d53 | 3994 | if (!f) { |
959aee9c | 3995 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
3996 | return -1; |
3997 | } | |
3998 | if (fprintf(f, "%s", buffer) < 0) { | |
3999 | SYSERROR("Writing timestamp"); | |
4000 | fclose(f); | |
4001 | return -1; | |
4002 | } | |
025ed0f3 | 4003 | ret = fclose(f); |
025ed0f3 | 4004 | if (ret != 0) { |
f5dd1d53 SH |
4005 | SYSERROR("Writing timestamp"); |
4006 | return -1; | |
4007 | } | |
4008 | ||
4009 | if (commentfile) { | |
1a0e70ac | 4010 | /* $p / $name / comment \0 */ |
f5dd1d53 SH |
4011 | int len = strlen(snappath) + strlen(newname) + 10; |
4012 | char *path = alloca(len); | |
4013 | sprintf(path, "%s/%s/comment", snappath, newname); | |
4014 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4015 | } | |
4016 | ||
4017 | return i; | |
4018 | } | |
4019 | ||
858377e4 SH |
4020 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4021 | ||
f5dd1d53 SH |
4022 | static void lxcsnap_free(struct lxc_snapshot *s) |
4023 | { | |
f10fad2f ME |
4024 | free(s->name); |
4025 | free(s->comment_pathname); | |
4026 | free(s->timestamp); | |
4027 | free(s->lxcpath); | |
f5dd1d53 SH |
4028 | } |
4029 | ||
4030 | static char *get_snapcomment_path(char* snappath, char *name) | |
4031 | { | |
1a0e70ac | 4032 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4033 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4034 | char *s = malloc(len); | |
4035 | ||
4036 | if (s) { | |
4037 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4038 | if (ret < 0 || ret >= len) { | |
4039 | free(s); | |
4040 | s = NULL; | |
4041 | } | |
4042 | } | |
4043 | return s; | |
4044 | } | |
4045 | ||
4046 | static char *get_timestamp(char* snappath, char *name) | |
4047 | { | |
4048 | char path[MAXPATHLEN], *s = NULL; | |
4049 | int ret, len; | |
4050 | FILE *fin; | |
4051 | ||
4052 | ret = snprintf(path, MAXPATHLEN, "%s/%s/ts", snappath, name); | |
4053 | if (ret < 0 || ret >= MAXPATHLEN) | |
4054 | return NULL; | |
025ed0f3 | 4055 | fin = fopen(path, "r"); |
025ed0f3 | 4056 | if (!fin) |
f5dd1d53 SH |
4057 | return NULL; |
4058 | (void) fseek(fin, 0, SEEK_END); | |
4059 | len = ftell(fin); | |
4060 | (void) fseek(fin, 0, SEEK_SET); | |
4061 | if (len > 0) { | |
4062 | s = malloc(len+1); | |
4063 | if (s) { | |
4064 | s[len] = '\0'; | |
4065 | if (fread(s, 1, len, fin) != len) { | |
4066 | SYSERROR("reading timestamp"); | |
4067 | free(s); | |
4068 | s = NULL; | |
4069 | } | |
4070 | } | |
4071 | } | |
4072 | fclose(fin); | |
4073 | return s; | |
4074 | } | |
4075 | ||
858377e4 | 4076 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 SH |
4077 | { |
4078 | char snappath[MAXPATHLEN], path2[MAXPATHLEN]; | |
18aa217b | 4079 | int count = 0, ret; |
74f96976 | 4080 | struct dirent *direntp; |
f5dd1d53 SH |
4081 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4082 | DIR *dir; | |
4083 | ||
4084 | if (!c || !lxcapi_is_defined(c)) | |
4085 | return -1; | |
c868b261 | 4086 | |
18aa217b | 4087 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4088 | ERROR("path name too long"); |
4089 | return -1; | |
4090 | } | |
025ed0f3 | 4091 | dir = opendir(snappath); |
025ed0f3 | 4092 | if (!dir) { |
f5dd1d53 SH |
4093 | INFO("failed to open %s - assuming no snapshots", snappath); |
4094 | return 0; | |
4095 | } | |
4096 | ||
74f96976 | 4097 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4098 | if (!direntp) |
4099 | break; | |
4100 | ||
4101 | if (!strcmp(direntp->d_name, ".")) | |
4102 | continue; | |
4103 | ||
4104 | if (!strcmp(direntp->d_name, "..")) | |
4105 | continue; | |
4106 | ||
4107 | ret = snprintf(path2, MAXPATHLEN, "%s/%s/config", snappath, direntp->d_name); | |
4108 | if (ret < 0 || ret >= MAXPATHLEN) { | |
4109 | ERROR("pathname too long"); | |
4110 | goto out_free; | |
4111 | } | |
4112 | if (!file_exists(path2)) | |
4113 | continue; | |
4114 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); | |
4115 | if (!nsnaps) { | |
4116 | SYSERROR("Out of memory"); | |
4117 | goto out_free; | |
4118 | } | |
4119 | snaps = nsnaps; | |
4120 | snaps[count].free = lxcsnap_free; | |
4121 | snaps[count].name = strdup(direntp->d_name); | |
4122 | if (!snaps[count].name) | |
4123 | goto out_free; | |
4124 | snaps[count].lxcpath = strdup(snappath); | |
4125 | if (!snaps[count].lxcpath) { | |
4126 | free(snaps[count].name); | |
4127 | goto out_free; | |
4128 | } | |
4129 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); | |
4130 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4131 | count++; | |
4132 | } | |
4133 | ||
4134 | if (closedir(dir)) | |
4135 | WARN("failed to close directory"); | |
4136 | ||
4137 | *ret_snaps = snaps; | |
4138 | return count; | |
4139 | ||
4140 | out_free: | |
4141 | if (snaps) { | |
4142 | int i; | |
4143 | for (i=0; i<count; i++) | |
4144 | lxcsnap_free(&snaps[i]); | |
4145 | free(snaps); | |
4146 | } | |
9baa57bd SH |
4147 | if (closedir(dir)) |
4148 | WARN("failed to close directory"); | |
f5dd1d53 SH |
4149 | return -1; |
4150 | } | |
4151 | ||
858377e4 SH |
4152 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4153 | ||
4154 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 SH |
4155 | { |
4156 | char clonelxcpath[MAXPATHLEN]; | |
18aa217b | 4157 | int flags = 0; |
f5dd1d53 | 4158 | struct lxc_container *snap, *rest; |
10bc1861 | 4159 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4160 | bool b = false; |
4161 | ||
4162 | if (!c || !c->name || !c->config_path) | |
4163 | return false; | |
4164 | ||
18aa217b SH |
4165 | if (has_fs_snapshots(c)) { |
4166 | ERROR("container rootfs has dependent snapshots"); | |
4167 | return false; | |
4168 | } | |
4169 | ||
8a388ed4 | 4170 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4171 | if (!bdev) { |
4172 | ERROR("Failed to find original backing store type"); | |
4173 | return false; | |
4174 | } | |
4175 | ||
17a367d8 CB |
4176 | /* For an overlay container the rootfs is considered immutable |
4177 | * and cannot be removed when restoring from a snapshot. We pass this | |
4178 | * internal flag along to communicate this to various parts of the | |
4179 | * codebase. | |
4180 | */ | |
4181 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4182 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4183 | ||
f5dd1d53 SH |
4184 | if (!newname) |
4185 | newname = c->name; | |
7e36f87e | 4186 | |
18aa217b | 4187 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4188 | storage_put(bdev); |
f5dd1d53 SH |
4189 | return false; |
4190 | } | |
1a0e70ac | 4191 | /* how should we lock this? */ |
f5dd1d53 SH |
4192 | |
4193 | snap = lxc_container_new(snapname, clonelxcpath); | |
4194 | if (!snap || !lxcapi_is_defined(snap)) { | |
4195 | ERROR("Could not open snapshot %s", snapname); | |
17a367d8 CB |
4196 | if (snap) |
4197 | lxc_container_put(snap); | |
10bc1861 | 4198 | storage_put(bdev); |
f5dd1d53 SH |
4199 | return false; |
4200 | } | |
4201 | ||
17a367d8 CB |
4202 | if (!strcmp(c->name, newname)) { |
4203 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4204 | ERROR("Could not destroy existing container %s", newname); |
4205 | lxc_container_put(snap); | |
10bc1861 | 4206 | storage_put(bdev); |
7e36f87e ÇO |
4207 | return false; |
4208 | } | |
4209 | } | |
4210 | ||
de269ee8 SH |
4211 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4212 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4213 | |
4214 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4215 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
09f6f8c4 CB |
4216 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4217 | NULL, 0, NULL); | |
10bc1861 | 4218 | storage_put(bdev); |
f5dd1d53 SH |
4219 | if (rest && lxcapi_is_defined(rest)) |
4220 | b = true; | |
4221 | if (rest) | |
4222 | lxc_container_put(rest); | |
17a367d8 | 4223 | |
f5dd1d53 SH |
4224 | lxc_container_put(snap); |
4225 | return b; | |
4226 | } | |
4227 | ||
858377e4 SH |
4228 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4229 | ||
18aa217b | 4230 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4231 | { |
771d96b3 | 4232 | struct lxc_container *snap = NULL; |
18aa217b | 4233 | bool bret = false; |
771d96b3 ÇO |
4234 | |
4235 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4236 | if (!snap) { |
771d96b3 ÇO |
4237 | ERROR("Could not find snapshot %s", snapname); |
4238 | goto err; | |
4239 | } | |
4240 | ||
858377e4 | 4241 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4242 | ERROR("Could not destroy snapshot %s", snapname); |
4243 | goto err; | |
4244 | } | |
18aa217b | 4245 | bret = true; |
771d96b3 | 4246 | |
771d96b3 ÇO |
4247 | err: |
4248 | if (snap) | |
4249 | lxc_container_put(snap); | |
18aa217b SH |
4250 | return bret; |
4251 | } | |
4252 | ||
4253 | static bool remove_all_snapshots(const char *path) | |
4254 | { | |
4255 | DIR *dir; | |
74f96976 | 4256 | struct dirent *direntp; |
18aa217b SH |
4257 | bool bret = true; |
4258 | ||
4259 | dir = opendir(path); | |
4260 | if (!dir) { | |
4261 | SYSERROR("opendir on snapshot path %s", path); | |
4262 | return false; | |
4263 | } | |
74f96976 | 4264 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4265 | if (!strcmp(direntp->d_name, ".")) |
4266 | continue; | |
4267 | if (!strcmp(direntp->d_name, "..")) | |
4268 | continue; | |
4269 | if (!do_snapshot_destroy(direntp->d_name, path)) { | |
4270 | bret = false; | |
4271 | continue; | |
4272 | } | |
4273 | } | |
4274 | ||
4275 | closedir(dir); | |
4276 | ||
4277 | if (rmdir(path)) | |
4278 | SYSERROR("Error removing directory %s", path); | |
4279 | ||
4280 | return bret; | |
4281 | } | |
4282 | ||
858377e4 | 4283 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b SH |
4284 | { |
4285 | char clonelxcpath[MAXPATHLEN]; | |
4286 | ||
4287 | if (!c || !c->name || !c->config_path || !snapname) | |
4288 | return false; | |
4289 | ||
4290 | if (!get_snappath_dir(c, clonelxcpath)) | |
4291 | return false; | |
4292 | ||
4293 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4294 | } | |
4295 | ||
858377e4 SH |
4296 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4297 | ||
4298 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b SH |
4299 | { |
4300 | char clonelxcpath[MAXPATHLEN]; | |
4301 | ||
4302 | if (!c || !c->name || !c->config_path) | |
4303 | return false; | |
4304 | ||
4305 | if (!get_snappath_dir(c, clonelxcpath)) | |
4306 | return false; | |
4307 | ||
4308 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4309 | } |
4310 | ||
858377e4 SH |
4311 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4312 | ||
4313 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd SH |
4314 | { |
4315 | return lxc_try_cmd(c->name, c->config_path) == 0; | |
4316 | } | |
4317 | ||
858377e4 SH |
4318 | WRAP_API(bool, lxcapi_may_control) |
4319 | ||
d5aa23e6 | 4320 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4321 | struct stat *st) |
d5aa23e6 | 4322 | { |
b69dfc9f CB |
4323 | int ret; |
4324 | char *tmp; | |
4325 | pid_t pid; | |
d5aa23e6 SH |
4326 | char chrootpath[MAXPATHLEN]; |
4327 | char *directory_path = NULL; | |
d5aa23e6 | 4328 | |
b69dfc9f CB |
4329 | pid = fork(); |
4330 | if (pid < 0) { | |
4331 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4332 | return false; |
4333 | } | |
b69dfc9f | 4334 | |
d5aa23e6 | 4335 | if (pid) { |
b69dfc9f CB |
4336 | ret = wait_for_pid(pid); |
4337 | if (ret != 0) { | |
4338 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4339 | return false; |
4340 | } | |
b69dfc9f | 4341 | |
d5aa23e6 SH |
4342 | return true; |
4343 | } | |
4344 | ||
4345 | /* prepare the path */ | |
4346 | ret = snprintf(chrootpath, MAXPATHLEN, "/proc/%d/root", init_pid); | |
4347 | if (ret < 0 || ret >= MAXPATHLEN) | |
4348 | return false; | |
4349 | ||
b69dfc9f CB |
4350 | ret = chroot(chrootpath); |
4351 | if (ret < 0) | |
a7764ce7 | 4352 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4353 | |
4354 | ret = chdir("/"); | |
4355 | if (ret < 0) | |
a7764ce7 | 4356 | _exit(EXIT_FAILURE); |
b69dfc9f | 4357 | |
d5aa23e6 | 4358 | /* remove path if it exists */ |
b69dfc9f CB |
4359 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4360 | if(ret == 0) { | |
4361 | ret = unlink(path); | |
c7d76c09 CB |
4362 | if (ret < 0) { |
4363 | ERROR("%s - Failed to remove \"%s\"", strerror(errno), path); | |
a7764ce7 | 4364 | _exit(EXIT_FAILURE); |
c7d76c09 | 4365 | } |
d5aa23e6 | 4366 | } |
b69dfc9f | 4367 | |
d5aa23e6 | 4368 | if (!add) |
a7764ce7 | 4369 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4370 | |
4371 | /* create any missing directories */ | |
b69dfc9f CB |
4372 | tmp = strdup(path); |
4373 | if (!tmp) | |
a7764ce7 | 4374 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4375 | |
4376 | directory_path = dirname(tmp); | |
4377 | ret = mkdir_p(directory_path, 0755); | |
4378 | if (ret < 0 && errno != EEXIST) { | |
c7d76c09 | 4379 | ERROR("%s - Failed to create path \"%s\"", strerror(errno), directory_path); |
b69dfc9f | 4380 | free(tmp); |
a7764ce7 | 4381 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4382 | } |
4383 | ||
4384 | /* create the device node */ | |
b69dfc9f CB |
4385 | ret = mknod(path, st->st_mode, st->st_rdev); |
4386 | free(tmp); | |
c7d76c09 CB |
4387 | if (ret < 0) { |
4388 | ERROR("%s - Failed to create device node at \"%s\"", strerror(errno), path); | |
a7764ce7 | 4389 | _exit(EXIT_FAILURE); |
c7d76c09 | 4390 | } |
d5aa23e6 | 4391 | |
a7764ce7 | 4392 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4393 | } |
4394 | ||
f0ca2726 | 4395 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4396 | { |
4397 | int ret; | |
4398 | struct stat st; | |
238b3e5e | 4399 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4400 | const char *p; |
a9a0ed90 ÇO |
4401 | |
4402 | /* make sure container is running */ | |
858377e4 | 4403 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4404 | ERROR("container is not running"); |
d5aa23e6 | 4405 | return false; |
a9a0ed90 ÇO |
4406 | } |
4407 | ||
4408 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4409 | p = dest_path ? dest_path : src_path; | |
4410 | ||
a9a0ed90 ÇO |
4411 | /* make sure we can access p */ |
4412 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4413 | return false; |
a9a0ed90 ÇO |
4414 | |
4415 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4416 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4417 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4418 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4419 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4420 | else |
d5aa23e6 | 4421 | return false; |
a9a0ed90 ÇO |
4422 | |
4423 | /* check snprintf return code */ | |
238b3e5e | 4424 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4425 | return false; |
a9a0ed90 | 4426 | |
858377e4 | 4427 | if (!do_add_remove_node(do_lxcapi_init_pid(c), p, add, &st)) |
d5aa23e6 | 4428 | return false; |
a9a0ed90 | 4429 | |
d5aa23e6 | 4430 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4431 | if (add) { |
858377e4 | 4432 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4433 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4434 | return false; |
a9a0ed90 ÇO |
4435 | } |
4436 | } else { | |
858377e4 | 4437 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4438 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4439 | return false; |
a9a0ed90 ÇO |
4440 | } |
4441 | } | |
d5aa23e6 | 4442 | |
a9a0ed90 | 4443 | return true; |
a9a0ed90 ÇO |
4444 | } |
4445 | ||
858377e4 | 4446 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4447 | { |
e0010464 | 4448 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4449 | if (am_host_unpriv()) { |
238b3e5e | 4450 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4451 | return false; |
4452 | } | |
a9a0ed90 ÇO |
4453 | return add_remove_device_node(c, src_path, dest_path, true); |
4454 | } | |
4455 | ||
858377e4 SH |
4456 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4457 | ||
4458 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4459 | { |
e0010464 | 4460 | if (am_guest_unpriv()) { |
238b3e5e | 4461 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4462 | return false; |
4463 | } | |
a9a0ed90 ÇO |
4464 | return add_remove_device_node(c, src_path, dest_path, false); |
4465 | } | |
4466 | ||
858377e4 SH |
4467 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4468 | ||
c7d76c09 CB |
4469 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4470 | const char *ifname, | |
4471 | const char *dst_ifname) | |
e58fae8f | 4472 | { |
c7d76c09 | 4473 | pid_t init_pid; |
e58fae8f | 4474 | int ret = 0; |
c7d76c09 | 4475 | |
e0010464 | 4476 | if (am_guest_unpriv()) { |
238b3e5e | 4477 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4478 | return false; |
4479 | } | |
4480 | ||
4481 | if (!ifname) { | |
4482 | ERROR("No source interface name given"); | |
4483 | return false; | |
4484 | } | |
4485 | ||
4486 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4487 | if (ret > 0) { |
4488 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4489 | ret = lxc_netdev_down(ifname); |
4490 | if (ret) | |
4491 | goto err; | |
4492 | } | |
4493 | ||
c7d76c09 CB |
4494 | init_pid = do_lxcapi_init_pid(c); |
4495 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); | |
e58fae8f DY |
4496 | if (ret) |
4497 | goto err; | |
4498 | ||
c7d76c09 | 4499 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4500 | return true; |
e5848d39 | 4501 | |
e58fae8f | 4502 | err: |
e58fae8f DY |
4503 | return false; |
4504 | } | |
4505 | ||
858377e4 SH |
4506 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4507 | ||
c7d76c09 CB |
4508 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4509 | const char *ifname, | |
4510 | const char *dst_ifname) | |
e58fae8f | 4511 | { |
c7d76c09 | 4512 | int ret; |
e58fae8f DY |
4513 | pid_t pid, pid_outside; |
4514 | ||
e0010464 SH |
4515 | /* |
4516 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4517 | * But for other types guest privilege suffices. | |
4518 | */ | |
4519 | if (am_guest_unpriv()) { | |
238b3e5e | 4520 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4521 | return false; |
4522 | } | |
4523 | ||
4524 | if (!ifname) { | |
4525 | ERROR("No source interface name given"); | |
4526 | return false; | |
4527 | } | |
4528 | ||
0059379f | 4529 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4530 | pid = fork(); |
4531 | if (pid < 0) { | |
c7d76c09 | 4532 | ERROR("Failed to fork"); |
e58fae8f DY |
4533 | return false; |
4534 | } | |
4535 | ||
1a0e70ac | 4536 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4537 | pid_t init_pid; |
4538 | ||
4539 | init_pid = do_lxcapi_init_pid(c); | |
4540 | if (!switch_to_ns(init_pid, "net")) { | |
4541 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4542 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4543 | } |
4544 | ||
4545 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4546 | if (ret < 0) { |
4547 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4548 | _exit(EXIT_FAILURE); |
c7d76c09 | 4549 | } |
e58fae8f DY |
4550 | |
4551 | /* netdev of ifname is up. */ | |
4552 | if (ret) { | |
4553 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4554 | if (ret) { |
4555 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4556 | _exit(EXIT_FAILURE); |
c7d76c09 | 4557 | } |
e58fae8f DY |
4558 | } |
4559 | ||
4560 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4561 | /* -EINVAL means there is no netdev named as ifname. */ |
4562 | if (ret < 0) { | |
4563 | if (ret == -EINVAL) | |
4564 | ERROR("Network device \"%s\" not found", ifname); | |
4565 | else | |
4566 | ERROR("Failed to remove network device \"%s\"", ifname); | |
8d7b6c25 | 4567 | _exit(EXIT_FAILURE); |
e58fae8f | 4568 | } |
c7d76c09 | 4569 | |
8d7b6c25 | 4570 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4571 | } |
4572 | ||
c7d76c09 CB |
4573 | ret = wait_for_pid(pid); |
4574 | if (ret != 0) | |
e58fae8f DY |
4575 | return false; |
4576 | ||
c7d76c09 | 4577 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4578 | return true; |
4579 | } | |
4580 | ||
858377e4 SH |
4581 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4582 | ||
aef3d51e TA |
4583 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4584 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4585 | { |
6b9be523 | 4586 | int ret = -1; |
2cb80427 | 4587 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4588 | uint64_t features_to_check = 0; |
85c50991 | 4589 | |
aef3d51e TA |
4590 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4591 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4592 | * to do anything special. | |
4593 | */ | |
4594 | if (size > sizeof(*opts)) { | |
4595 | unsigned char *addr; | |
4596 | unsigned char *end; | |
4597 | ||
4598 | addr = (void *)opts + sizeof(*opts); | |
4599 | end = (void *)opts + size; | |
4600 | for (; addr < end; addr++) { | |
4601 | if (*addr) { | |
4602 | return -E2BIG; | |
4603 | } | |
4604 | } | |
85c50991 TA |
4605 | } |
4606 | ||
2cb80427 TA |
4607 | /* If the caller has a smaller struct, let's zero out the end for them |
4608 | * so we don't accidentally use bits of it that they didn't know about | |
4609 | * to initialize. | |
4610 | */ | |
4611 | if (size < sizeof(*opts)) { | |
4612 | valid_opts = malloc(sizeof(*opts)); | |
4613 | if (!valid_opts) | |
4614 | return -ENOMEM; | |
4615 | ||
4616 | memset(valid_opts, 0, sizeof(*opts)); | |
4617 | memcpy(valid_opts, opts, size); | |
4618 | } | |
4619 | ||
aef3d51e TA |
4620 | switch (cmd) { |
4621 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4622 | if (!do_lxcapi_is_running(c)) { |
4623 | ERROR("container is not running"); | |
6b9be523 | 4624 | goto on_error; |
7ad13c91 | 4625 | } |
2cb80427 | 4626 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4627 | break; |
4628 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4629 | if (!do_lxcapi_is_running(c)) { |
4630 | ERROR("container is not running"); | |
6b9be523 | 4631 | goto on_error; |
7ad13c91 | 4632 | } |
2cb80427 | 4633 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4634 | break; |
4635 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4636 | if (do_lxcapi_is_running(c)) { |
4637 | ERROR("container is already running"); | |
6b9be523 | 4638 | goto on_error; |
7ad13c91 | 4639 | } |
2cb80427 | 4640 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4641 | break; |
b5b12b9e AR |
4642 | case MIGRATE_FEATURE_CHECK: |
4643 | features_to_check = valid_opts->features_to_check; | |
4644 | ret = !__criu_check_feature(&features_to_check); | |
4645 | if (ret) { | |
4646 | /* Something went wrong. Let's let the caller | |
4647 | * know which feature checks failed. */ | |
4648 | valid_opts->features_to_check = features_to_check; | |
4649 | } | |
4650 | break; | |
aef3d51e TA |
4651 | default: |
4652 | ERROR("invalid migrate command %u", cmd); | |
4653 | ret = -EINVAL; | |
4654 | } | |
735f2c6e | 4655 | |
6b9be523 | 4656 | on_error: |
f686506d TA |
4657 | if (size < sizeof(*opts)) |
4658 | free(valid_opts); | |
4659 | ||
aef3d51e TA |
4660 | return ret; |
4661 | } | |
735f2c6e | 4662 | |
aef3d51e | 4663 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4664 | |
aef3d51e TA |
4665 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4666 | { | |
ebb088e1 AR |
4667 | struct migrate_opts opts; |
4668 | ||
4669 | memset(&opts, 0, sizeof(opts)); | |
4670 | ||
4671 | opts.directory = directory; | |
4672 | opts.stop = stop; | |
4673 | opts.verbose = verbose; | |
735f2c6e | 4674 | |
aef3d51e | 4675 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4676 | } |
4677 | ||
858377e4 SH |
4678 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4679 | ||
4680 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4681 | { |
ebb088e1 AR |
4682 | struct migrate_opts opts; |
4683 | ||
4684 | memset(&opts, 0, sizeof(opts)); | |
4685 | ||
4686 | opts.directory = directory; | |
4687 | opts.verbose = verbose; | |
c9d8f2ee | 4688 | |
aef3d51e | 4689 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4690 | } |
4691 | ||
858377e4 SH |
4692 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4693 | ||
a0e93eeb CS |
4694 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
4695 | { | |
4696 | va_list ap; | |
4697 | const char **argv; | |
4698 | int ret; | |
4699 | ||
4700 | if (!c) | |
4701 | return -1; | |
4702 | ||
858377e4 SH |
4703 | current_config = c->lxc_conf; |
4704 | ||
a0e93eeb CS |
4705 | va_start(ap, arg); |
4706 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
4707 | va_end(ap); | |
4708 | ||
4709 | if (!argv) { | |
4710 | ERROR("Memory allocation error."); | |
858377e4 SH |
4711 | ret = -1; |
4712 | goto out; | |
a0e93eeb CS |
4713 | } |
4714 | argv[0] = arg; | |
4715 | ||
858377e4 | 4716 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 4717 | free((void*)argv); |
858377e4 SH |
4718 | out: |
4719 | current_config = NULL; | |
a0e93eeb CS |
4720 | return ret; |
4721 | } | |
4722 | ||
afeecbba | 4723 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
4724 | { |
4725 | struct lxc_container *c; | |
72d0e1cb | 4726 | |
18aa217b SH |
4727 | if (!name) |
4728 | return NULL; | |
4729 | ||
72d0e1cb SG |
4730 | c = malloc(sizeof(*c)); |
4731 | if (!c) { | |
e9e29a33 | 4732 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
4733 | return NULL; |
4734 | } | |
4735 | memset(c, 0, sizeof(*c)); | |
4736 | ||
afeecbba SH |
4737 | if (configpath) |
4738 | c->config_path = strdup(configpath); | |
4739 | else | |
593e8478 | 4740 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
afeecbba | 4741 | |
2a59a681 | 4742 | if (!c->config_path) { |
e9e29a33 | 4743 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
4744 | goto err; |
4745 | } | |
4746 | ||
f5dd1d53 | 4747 | remove_trailing_slashes(c->config_path); |
72d0e1cb SG |
4748 | c->name = malloc(strlen(name)+1); |
4749 | if (!c->name) { | |
e9e29a33 | 4750 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
4751 | goto err; |
4752 | } | |
4753 | strcpy(c->name, name); | |
4754 | ||
4755 | c->numthreads = 1; | |
e9e29a33 CB |
4756 | c->slock = lxc_newlock(c->config_path, name); |
4757 | if (!c->slock) { | |
4758 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
4759 | goto err; |
4760 | } | |
4761 | ||
e9e29a33 CB |
4762 | c->privlock = lxc_newlock(NULL, NULL); |
4763 | if (!c->privlock) { | |
4764 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
4765 | goto err; |
4766 | } | |
4767 | ||
afeecbba | 4768 | if (!set_config_filename(c)) { |
e9e29a33 | 4769 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
4770 | goto err; |
4771 | } | |
72d0e1cb | 4772 | |
e9e29a33 CB |
4773 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
4774 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 4775 | goto err; |
e9e29a33 | 4776 | } |
72d0e1cb | 4777 | |
3e625e2d | 4778 | if (ongoing_create(c) == 2) { |
e9e29a33 | 4779 | ERROR("Failed to complete container creation for %s", c->name); |
17a367d8 | 4780 | container_destroy(c, NULL); |
4df7f012 | 4781 | lxcapi_clear_config(c); |
3e625e2d | 4782 | } |
a2739df5 | 4783 | c->daemonize = true; |
72cf75fa | 4784 | c->pidfile = NULL; |
3e625e2d | 4785 | |
1a0e70ac | 4786 | /* Assign the member functions. */ |
72d0e1cb SG |
4787 | c->is_defined = lxcapi_is_defined; |
4788 | c->state = lxcapi_state; | |
4789 | c->is_running = lxcapi_is_running; | |
4790 | c->freeze = lxcapi_freeze; | |
4791 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 4792 | c->console = lxcapi_console; |
b5159817 | 4793 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
4794 | c->init_pid = lxcapi_init_pid; |
4795 | c->load_config = lxcapi_load_config; | |
4796 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 4797 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
4798 | c->start = lxcapi_start; |
4799 | c->startl = lxcapi_startl; | |
4800 | c->stop = lxcapi_stop; | |
4801 | c->config_file_name = lxcapi_config_file_name; | |
4802 | c->wait = lxcapi_wait; | |
4803 | c->set_config_item = lxcapi_set_config_item; | |
4804 | c->destroy = lxcapi_destroy; | |
18aa217b | 4805 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 4806 | c->rename = lxcapi_rename; |
72d0e1cb SG |
4807 | c->save_config = lxcapi_save_config; |
4808 | c->get_keys = lxcapi_get_keys; | |
4809 | c->create = lxcapi_create; | |
4810 | c->createl = lxcapi_createl; | |
4811 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 4812 | c->reboot = lxcapi_reboot; |
d39b10eb | 4813 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 4814 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
4815 | c->clear_config_item = lxcapi_clear_config_item; |
4816 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 4817 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
4818 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
4819 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
4820 | c->get_config_path = lxcapi_get_config_path; |
4821 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 4822 | c->clone = lxcapi_clone; |
799f29ab | 4823 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 4824 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
4825 | c->attach = lxcapi_attach; |
4826 | c->attach_run_wait = lxcapi_attach_run_wait; | |
4827 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
4828 | c->snapshot = lxcapi_snapshot; |
4829 | c->snapshot_list = lxcapi_snapshot_list; | |
4830 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 4831 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 4832 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 4833 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
4834 | c->add_device_node = lxcapi_add_device_node; |
4835 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
4836 | c->attach_interface = lxcapi_attach_interface; |
4837 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
4838 | c->checkpoint = lxcapi_checkpoint; |
4839 | c->restore = lxcapi_restore; | |
aef3d51e | 4840 | c->migrate = lxcapi_migrate; |
191d43cc | 4841 | c->console_log = lxcapi_console_log; |
72d0e1cb | 4842 | |
72d0e1cb SG |
4843 | return c; |
4844 | ||
4845 | err: | |
4846 | lxc_container_free(c); | |
4847 | return NULL; | |
4848 | } | |
4849 | ||
4a7c7daa | 4850 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
4851 | { |
4852 | int i; | |
4853 | ||
4854 | if (states) | |
4855 | for (i=0; i<MAX_STATE; i++) | |
4856 | states[i] = lxc_state2str(i); | |
4857 | return MAX_STATE; | |
4858 | } | |
a41f104b | 4859 | |
a41f104b SH |
4860 | /* |
4861 | * These next two could probably be done smarter with reusing a common function | |
4862 | * with different iterators and tests... | |
4863 | */ | |
4864 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
4865 | { | |
4866 | DIR *dir; | |
4867 | int i, cfound = 0, nfound = 0; | |
74f96976 | 4868 | struct dirent *direntp; |
a41f104b SH |
4869 | struct lxc_container *c; |
4870 | ||
4871 | if (!lxcpath) | |
593e8478 | 4872 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 4873 | |
a41f104b | 4874 | dir = opendir(lxcpath); |
a41f104b SH |
4875 | if (!dir) { |
4876 | SYSERROR("opendir on lxcpath"); | |
4877 | return -1; | |
4878 | } | |
4879 | ||
4880 | if (cret) | |
4881 | *cret = NULL; | |
4882 | if (names) | |
4883 | *names = NULL; | |
4884 | ||
74f96976 | 4885 | while ((direntp = readdir(dir))) { |
a41f104b SH |
4886 | if (!direntp) |
4887 | break; | |
e4ebeab1 | 4888 | |
1a0e70ac | 4889 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 4890 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
4891 | continue; |
4892 | ||
4893 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
4894 | continue; | |
4895 | ||
4896 | if (names) { | |
9c88ff1f | 4897 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b SH |
4898 | goto free_bad; |
4899 | } | |
4900 | cfound++; | |
4901 | ||
4902 | if (!cret) { | |
4903 | nfound++; | |
4904 | continue; | |
4905 | } | |
4906 | ||
4907 | c = lxc_container_new(direntp->d_name, lxcpath); | |
4908 | if (!c) { | |
4909 | INFO("Container %s:%s has a config but could not be loaded", | |
4910 | lxcpath, direntp->d_name); | |
4911 | if (names) | |
9c88ff1f ÇO |
4912 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4913 | goto free_bad; | |
a41f104b SH |
4914 | continue; |
4915 | } | |
858377e4 | 4916 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
4917 | INFO("Container %s:%s has a config but is not defined", |
4918 | lxcpath, direntp->d_name); | |
4919 | if (names) | |
9c88ff1f ÇO |
4920 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4921 | goto free_bad; | |
a41f104b SH |
4922 | lxc_container_put(c); |
4923 | continue; | |
4924 | } | |
4925 | ||
2871830a | 4926 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
4927 | lxc_container_put(c); |
4928 | goto free_bad; | |
4929 | } | |
4930 | nfound++; | |
4931 | } | |
4932 | ||
a41f104b | 4933 | closedir(dir); |
a41f104b SH |
4934 | return nfound; |
4935 | ||
4936 | free_bad: | |
4937 | if (names && *names) { | |
4938 | for (i=0; i<cfound; i++) | |
4939 | free((*names)[i]); | |
4940 | free(*names); | |
4941 | } | |
4942 | if (cret && *cret) { | |
4943 | for (i=0; i<nfound; i++) | |
4944 | lxc_container_put((*cret)[i]); | |
4945 | free(*cret); | |
4946 | } | |
a41f104b | 4947 | closedir(dir); |
a41f104b SH |
4948 | return -1; |
4949 | } | |
4950 | ||
148a9d27 DE |
4951 | int list_active_containers(const char *lxcpath, char ***nret, |
4952 | struct lxc_container ***cret) | |
a41f104b | 4953 | { |
148a9d27 | 4954 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
4955 | int lxcpath_len; |
4956 | char *line = NULL; | |
148a9d27 | 4957 | char **ct_name = NULL; |
a41f104b | 4958 | size_t len = 0; |
97bc2422 | 4959 | struct lxc_container *c = NULL; |
88556fd7 | 4960 | bool is_hashed; |
a41f104b SH |
4961 | |
4962 | if (!lxcpath) | |
593e8478 | 4963 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
4964 | lxcpath_len = strlen(lxcpath); |
4965 | ||
4966 | if (cret) | |
4967 | *cret = NULL; | |
148a9d27 DE |
4968 | if (nret) |
4969 | *nret = NULL; | |
a41f104b | 4970 | |
a41f104b | 4971 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
4972 | if (!f) |
4973 | return -1; | |
4974 | ||
4975 | while (getline(&line, &len, f) != -1) { | |
88556fd7 | 4976 | |
0f8f9c8a | 4977 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
4978 | if (!p) |
4979 | continue; | |
4980 | p++; | |
4981 | if (*p != 0x40) | |
4982 | continue; | |
4983 | p++; | |
88556fd7 ÇO |
4984 | |
4985 | is_hashed = false; | |
4986 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { | |
4987 | p += lxcpath_len; | |
4988 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
4989 | p += 4; | |
4990 | is_hashed = true; | |
4991 | } else { | |
a41f104b | 4992 | continue; |
88556fd7 ÇO |
4993 | } |
4994 | ||
a41f104b SH |
4995 | while (*p == '/') |
4996 | p++; | |
4997 | ||
1a0e70ac | 4998 | /* Now p is the start of lxc_name. */ |
46cd2845 | 4999 | p2 = strchr(p, '/'); |
a41f104b SH |
5000 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5001 | continue; | |
5002 | *p2 = '\0'; | |
5003 | ||
88556fd7 | 5004 | if (is_hashed) { |
899a9f55 CB |
5005 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5006 | if (!recvpath) | |
5007 | continue; | |
e07eafa8 L |
5008 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5009 | free(recvpath); | |
88556fd7 | 5010 | continue; |
e07eafa8 L |
5011 | } |
5012 | free(recvpath); | |
88556fd7 | 5013 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5014 | if (!p) |
5015 | continue; | |
88556fd7 ÇO |
5016 | } |
5017 | ||
e07eafa8 L |
5018 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5019 | if (is_hashed) | |
5020 | free(p); | |
9c88ff1f | 5021 | continue; |
e07eafa8 | 5022 | } |
9c88ff1f | 5023 | |
e07eafa8 L |
5024 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5025 | if (is_hashed) | |
5026 | free(p); | |
148a9d27 | 5027 | goto free_cret_list; |
e07eafa8 | 5028 | } |
9c88ff1f | 5029 | |
148a9d27 | 5030 | ct_name_cnt++; |
a41f104b | 5031 | |
e07eafa8 L |
5032 | if (!cret) { |
5033 | if (is_hashed) | |
5034 | free(p); | |
a41f104b | 5035 | continue; |
e07eafa8 | 5036 | } |
a41f104b SH |
5037 | |
5038 | c = lxc_container_new(p, lxcpath); | |
5039 | if (!c) { | |
5040 | INFO("Container %s:%s is running but could not be loaded", | |
5041 | lxcpath, p); | |
148a9d27 | 5042 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5043 | if (is_hashed) |
5044 | free(p); | |
a41f104b SH |
5045 | continue; |
5046 | } | |
5047 | ||
e07eafa8 L |
5048 | if (is_hashed) |
5049 | free(p); | |
5050 | ||
a41f104b SH |
5051 | /* |
5052 | * If this is an anonymous container, then is_defined *can* | |
5053 | * return false. So we don't do that check. Count on the | |
5054 | * fact that the command socket exists. | |
5055 | */ | |
5056 | ||
148a9d27 | 5057 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5058 | lxc_container_put(c); |
148a9d27 | 5059 | goto free_cret_list; |
a41f104b | 5060 | } |
148a9d27 | 5061 | cret_cnt++; |
a41f104b SH |
5062 | } |
5063 | ||
97bc2422 CB |
5064 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5065 | if (c) | |
5066 | lxc_container_put(c); | |
5067 | goto free_cret_list; | |
5068 | } | |
5069 | ||
148a9d27 DE |
5070 | ret = ct_name_cnt; |
5071 | if (nret) | |
5072 | *nret = ct_name; | |
5073 | else | |
5074 | goto free_ct_name; | |
5075 | goto out; | |
a41f104b | 5076 | |
148a9d27 | 5077 | free_cret_list: |
a41f104b | 5078 | if (cret && *cret) { |
148a9d27 | 5079 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5080 | lxc_container_put((*cret)[i]); |
5081 | free(*cret); | |
5082 | } | |
148a9d27 DE |
5083 | |
5084 | free_ct_name: | |
5085 | if (ct_name) { | |
5086 | for (i = 0; i < ct_name_cnt; i++) | |
5087 | free(ct_name[i]); | |
5088 | free(ct_name); | |
5089 | } | |
5090 | ||
5091 | out: | |
f10fad2f | 5092 | free(line); |
e853a32d | 5093 | |
a41f104b | 5094 | fclose(f); |
148a9d27 | 5095 | return ret; |
a41f104b | 5096 | } |
2871830a DE |
5097 | |
5098 | int list_all_containers(const char *lxcpath, char ***nret, | |
5099 | struct lxc_container ***cret) | |
5100 | { | |
5101 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5102 | char **active_name; | |
5103 | char **ct_name; | |
5104 | struct lxc_container **ct_list = NULL; | |
5105 | ||
5106 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5107 | if (ct_cnt < 0) | |
5108 | return ct_cnt; | |
5109 | ||
5110 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5111 | if (active_cnt < 0) { | |
5112 | ret = active_cnt; | |
5113 | goto free_ct_name; | |
5114 | } | |
5115 | ||
5116 | for (i = 0; i < active_cnt; i++) { | |
5117 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5118 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5119 | ret = -1; | |
5120 | goto free_active_name; | |
5121 | } | |
5122 | ct_cnt++; | |
5123 | } | |
5124 | free(active_name[i]); | |
5125 | active_name[i] = NULL; | |
5126 | } | |
5127 | free(active_name); | |
5128 | active_name = NULL; | |
5129 | active_cnt = 0; | |
5130 | ||
5131 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5132 | struct lxc_container *c; | |
5133 | ||
5134 | c = lxc_container_new(ct_name[i], lxcpath); | |
5135 | if (!c) { | |
5136 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5137 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5138 | continue; | |
5139 | } | |
5140 | ||
5141 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5142 | lxc_container_put(c); | |
5143 | ret = -1; | |
5144 | goto free_ct_list; | |
5145 | } | |
5146 | ct_list_cnt++; | |
5147 | } | |
5148 | ||
5149 | if (cret) | |
5150 | *cret = ct_list; | |
5151 | ||
5152 | if (nret) | |
5153 | *nret = ct_name; | |
5154 | else { | |
5155 | ret = ct_cnt; | |
5156 | goto free_ct_name; | |
5157 | } | |
5158 | return ct_cnt; | |
5159 | ||
5160 | free_ct_list: | |
5161 | for (i = 0; i < ct_list_cnt; i++) { | |
5162 | lxc_container_put(ct_list[i]); | |
5163 | } | |
f10fad2f | 5164 | free(ct_list); |
2871830a DE |
5165 | |
5166 | free_active_name: | |
5167 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5168 | free(active_name[i]); |
2871830a | 5169 | } |
f10fad2f | 5170 | free(active_name); |
2871830a DE |
5171 | |
5172 | free_ct_name: | |
5173 | for (i = 0; i < ct_cnt; i++) { | |
5174 | free(ct_name[i]); | |
5175 | } | |
5176 | free(ct_name); | |
5177 | return ret; | |
5178 | } | |
12461428 CB |
5179 | |
5180 | bool lxc_config_item_is_supported(const char *key) | |
5181 | { | |
300df83e | 5182 | return !!lxc_get_config(key); |
12461428 | 5183 | } |