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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> |
29df56cd | 33 | #include <stdlib.h> |
56474555 | 34 | #include <sys/file.h> |
38683db4 CB |
35 | #include <sys/mman.h> |
36 | #include <sys/mount.h> | |
29df56cd | 37 | #include <sys/stat.h> |
5f7eba0b | 38 | #include <sys/syscall.h> |
0e14584d | 39 | #include <sys/sysmacros.h> |
38683db4 CB |
40 | #include <sys/types.h> |
41 | #include <sys/wait.h> | |
0e14584d | 42 | #include <unistd.h> |
f2363e38 | 43 | |
5e5576a4 | 44 | #include "af_unix.h" |
38683db4 | 45 | #include "attach.h" |
38683db4 | 46 | #include "cgroup.h" |
38683db4 | 47 | #include "commands.h" |
92e35018 | 48 | #include "commands_utils.h" |
0e14584d CB |
49 | #include "conf.h" |
50 | #include "config.h" | |
72d0e1cb | 51 | #include "confile.h" |
4222a9f4 | 52 | #include "confile_utils.h" |
e29fe1dd | 53 | #include "criu.h" |
238b3e5e | 54 | #include "error.h" |
a6f151a7 | 55 | #include "initutils.h" |
72d0e1cb | 56 | #include "log.h" |
38683db4 CB |
57 | #include "lxc.h" |
58 | #include "lxccontainer.h" | |
59 | #include "lxclock.h" | |
f2363e38 ÇO |
60 | #include "monitor.h" |
61 | #include "namespace.h" | |
fed29fad | 62 | #include "network.h" |
9994d140 | 63 | #include "parse.h" |
aa460476 | 64 | #include "start.h" |
38683db4 | 65 | #include "state.h" |
28d832c4 CB |
66 | #include "storage.h" |
67 | #include "storage/btrfs.h" | |
68 | #include "storage/overlay.h" | |
0e14584d | 69 | #include "storage_utils.h" |
28d832c4 | 70 | #include "sync.h" |
0ed9b1bc | 71 | #include "terminal.h" |
38683db4 CB |
72 | #include "utils.h" |
73 | #include "version.h" | |
4ba0d9af | 74 | |
af6824fc ST |
75 | /* major()/minor() */ |
76 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 77 | #include <sys/mkdev.h> |
af6824fc | 78 | #endif |
af6824fc | 79 | |
4ba0d9af | 80 | #if HAVE_IFADDRS_H |
9c83a661 | 81 | #include <ifaddrs.h> |
4ba0d9af SG |
82 | #else |
83 | #include <../include/ifaddrs.h> | |
84 | #endif | |
72d0e1cb | 85 | |
684f79a5 SG |
86 | #if IS_BIONIC |
87 | #include <../include/lxcmntent.h> | |
88 | #else | |
89 | #include <mntent.h> | |
90 | #endif | |
91 | ||
9de31d5a CB |
92 | #ifndef HAVE_STRLCPY |
93 | #include "include/strlcpy.h" | |
94 | #endif | |
95 | ||
5f7eba0b SG |
96 | /* Define faccessat() if missing from the C library */ |
97 | #ifndef HAVE_FACCESSAT | |
98 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
99 | { | |
100 | #ifdef __NR_faccessat | |
238b3e5e | 101 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 102 | #else |
238b3e5e CB |
103 | errno = ENOSYS; |
104 | return -1; | |
5f7eba0b SG |
105 | #endif |
106 | } | |
107 | #endif | |
108 | ||
ac2cecc4 | 109 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 110 | |
858377e4 SH |
111 | static bool do_lxcapi_destroy(struct lxc_container *c); |
112 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
113 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
114 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
115 | static bool container_destroy(struct lxc_container *c, |
116 | struct lxc_storage *storage); | |
858377e4 SH |
117 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
118 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
119 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
120 | ||
a41f104b SH |
121 | static bool config_file_exists(const char *lxcpath, const char *cname) |
122 | { | |
ef1ab8f1 CB |
123 | int ret; |
124 | size_t len; | |
125 | char *fname; | |
a41f104b | 126 | |
ef1ab8f1 CB |
127 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
128 | len = strlen(lxcpath) + strlen(cname) + 9; | |
129 | fname = alloca(len); | |
130 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); | |
131 | if (ret < 0 || (size_t)ret >= len) | |
a41f104b SH |
132 | return false; |
133 | ||
134 | return file_exists(fname); | |
135 | } | |
136 | ||
444249ea CB |
137 | /* A few functions to help detect when a container creation failed. If a |
138 | * container creation was killed partway through, then trying to actually start | |
139 | * that container could harm the host. We detect this by creating a 'partial' | |
140 | * file under the container directory, and keeping an advisory lock. When | |
141 | * container creation completes, we remove that file. When we load or try to | |
142 | * start a container, if we find that file, without a flock, we remove the | |
143 | * container. | |
3e625e2d | 144 | */ |
74a3920a | 145 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 146 | { |
3e625e2d | 147 | int fd, ret; |
444249ea CB |
148 | size_t len; |
149 | char *path; | |
56474555 | 150 | struct flock lk = {0}; |
93dc5327 | 151 | |
444249ea CB |
152 | len = strlen(c->config_path) + strlen(c->name) + 10; |
153 | path = alloca(len); | |
3e625e2d | 154 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
444249ea | 155 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 156 | return -1; |
3e625e2d SH |
157 | |
158 | if (!file_exists(path)) | |
159 | return 0; | |
444249ea | 160 | |
025ed0f3 | 161 | fd = open(path, O_RDWR); |
444249ea | 162 | if (fd < 0) |
3e625e2d | 163 | return 0; |
444249ea | 164 | |
93dc5327 SH |
165 | lk.l_type = F_WRLCK; |
166 | lk.l_whence = SEEK_SET; | |
93dc5327 | 167 | lk.l_pid = -1; |
444249ea | 168 | |
56474555 CB |
169 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
170 | if (ret < 0 && errno == EINVAL) | |
171 | ret = flock(fd, LOCK_EX | LOCK_NB); | |
a73846d8 | 172 | |
444249ea | 173 | close(fd); |
a73846d8 | 174 | |
175 | if (ret == 0 && lk.l_pid != -1) | |
1a0e70ac | 176 | /* create is still ongoing */ |
3e625e2d | 177 | return 1; |
444249ea CB |
178 | |
179 | /* Create completed but partial is still there. */ | |
3e625e2d SH |
180 | return 2; |
181 | } | |
182 | ||
74a3920a | 183 | static int create_partial(struct lxc_container *c) |
3e625e2d | 184 | { |
3e625e2d | 185 | int fd, ret; |
f5cd0252 CB |
186 | size_t len; |
187 | char *path; | |
56474555 | 188 | struct flock lk = {0}; |
93dc5327 | 189 | |
f5cd0252 CB |
190 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
191 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
192 | path = alloca(len); | |
3e625e2d | 193 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
f5cd0252 | 194 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 195 | return -1; |
f5cd0252 CB |
196 | |
197 | fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0755); | |
198 | if (fd < 0) | |
3e625e2d | 199 | return -1; |
f5cd0252 | 200 | |
93dc5327 SH |
201 | lk.l_type = F_WRLCK; |
202 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 203 | |
56474555 | 204 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 205 | if (ret < 0) { |
56474555 CB |
206 | if (errno == EINVAL) { |
207 | ret = flock(fd, LOCK_EX); | |
208 | if (ret == 0) | |
209 | return fd; | |
210 | } | |
211 | ||
f5cd0252 | 212 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 213 | close(fd); |
3e625e2d SH |
214 | return -1; |
215 | } | |
3e625e2d SH |
216 | |
217 | return fd; | |
218 | } | |
219 | ||
74a3920a | 220 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 221 | { |
3e625e2d | 222 | int ret; |
a3740e80 CB |
223 | size_t len; |
224 | char *path; | |
3e625e2d SH |
225 | |
226 | close(fd); | |
a73846d8 | 227 | |
a3740e80 CB |
228 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
229 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
230 | path = alloca(len); | |
3e625e2d | 231 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
a3740e80 | 232 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 233 | return; |
a3740e80 CB |
234 | |
235 | ret = unlink(path); | |
236 | if (ret < 0) | |
237 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
238 | } |
239 | ||
72d0e1cb | 240 | /* LOCKING |
3bc449ed SH |
241 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
242 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
243 | * container configuration file. | |
244 | * The container_disk_lock also takes the container_mem_lock. | |
245 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
246 | * NOTHING mutexes two independent programs with their own struct |
247 | * lxc_container for the same c->name, between API calls. For instance, | |
248 | * c->config_read(); c->start(); Between those calls, data on disk | |
249 | * could change (which shouldn't bother the caller unless for instance | |
250 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
251 | * Two such updaters could race. The callers should therefore check their | |
252 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
253 | * due to hung callers. So I prefer to keep the locks only within our own | |
254 | * functions, not across functions. | |
255 | * | |
3bc449ed | 256 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
257 | * c->numthreads (under privlock) before forking. When deleting, |
258 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
259 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
260 | */ | |
72d0e1cb SG |
261 | static void lxc_container_free(struct lxc_container *c) |
262 | { | |
263 | if (!c) | |
264 | return; | |
265 | ||
f10fad2f ME |
266 | free(c->configfile); |
267 | c->configfile = NULL; | |
70849dc2 | 268 | |
f10fad2f ME |
269 | free(c->error_string); |
270 | c->error_string = NULL; | |
70849dc2 | 271 | |
d95db067 | 272 | if (c->slock) { |
df271a59 | 273 | lxc_putlock(c->slock); |
d95db067 DE |
274 | c->slock = NULL; |
275 | } | |
70849dc2 | 276 | |
72d0e1cb | 277 | if (c->privlock) { |
df271a59 | 278 | lxc_putlock(c->privlock); |
72d0e1cb SG |
279 | c->privlock = NULL; |
280 | } | |
70849dc2 | 281 | |
f10fad2f ME |
282 | free(c->name); |
283 | c->name = NULL; | |
70849dc2 | 284 | |
d95db067 DE |
285 | if (c->lxc_conf) { |
286 | lxc_conf_free(c->lxc_conf); | |
287 | c->lxc_conf = NULL; | |
288 | } | |
70849dc2 | 289 | |
f10fad2f ME |
290 | free(c->config_path); |
291 | c->config_path = NULL; | |
72cf75fa | 292 | |
72d0e1cb SG |
293 | free(c); |
294 | } | |
295 | ||
045552aa CB |
296 | /* Consider the following case: |
297 | * | |
298 | * |====================================================================| | |
299 | * | freer | racing get()er | | |
300 | * |====================================================================| | |
301 | * | lxc_container_put() | lxc_container_get() | | |
302 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
303 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
304 | * | \ lxcunlock() | \ | | |
305 | * | \ lxc_container_free() | \ lxclock() returns | | |
306 | * | | \ c->numthreads < 1 -> return 0 | | |
307 | * | \ \ (free stuff) | | | |
308 | * | \ \ sem_destroy(privlock) | | | |
309 | * |_______________________________|____________________________________| | |
310 | * | |
43d1aa34 SH |
311 | * When the get()er checks numthreads the first time, one of the following |
312 | * is true: | |
313 | * 1. freer has set numthreads = 0. get() returns 0 | |
314 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
315 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
316 | * numthreads is 0 and exit without touching lxclock again.. | |
317 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
318 | * will see --numthreads = 1 and not call lxc_container_free(). | |
319 | */ | |
320 | ||
72d0e1cb SG |
321 | int lxc_container_get(struct lxc_container *c) |
322 | { | |
323 | if (!c) | |
324 | return 0; | |
325 | ||
1a0e70ac CB |
326 | /* If someone else has already started freeing the container, don't try |
327 | * to take the lock, which may be invalid. | |
328 | */ | |
43d1aa34 SH |
329 | if (c->numthreads < 1) |
330 | return 0; | |
331 | ||
5cee8c50 | 332 | if (container_mem_lock(c)) |
72d0e1cb | 333 | return 0; |
1a0e70ac CB |
334 | |
335 | /* Bail without trying to unlock, bc the privlock is now probably in | |
336 | * freed memory. | |
337 | */ | |
338 | if (c->numthreads < 1) | |
72d0e1cb | 339 | return 0; |
1a0e70ac | 340 | |
72d0e1cb | 341 | c->numthreads++; |
5cee8c50 | 342 | container_mem_unlock(c); |
045552aa | 343 | |
72d0e1cb SG |
344 | return 1; |
345 | } | |
346 | ||
347 | int lxc_container_put(struct lxc_container *c) | |
348 | { | |
349 | if (!c) | |
350 | return -1; | |
045552aa | 351 | |
5cee8c50 | 352 | if (container_mem_lock(c)) |
72d0e1cb | 353 | return -1; |
045552aa | 354 | |
44619b6c CB |
355 | c->numthreads--; |
356 | ||
357 | if (c->numthreads < 1) { | |
5cee8c50 | 358 | container_mem_unlock(c); |
72d0e1cb SG |
359 | lxc_container_free(c); |
360 | return 1; | |
361 | } | |
045552aa | 362 | |
5cee8c50 | 363 | container_mem_unlock(c); |
72d0e1cb SG |
364 | return 0; |
365 | } | |
366 | ||
858377e4 | 367 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 368 | { |
428ad142 | 369 | int statret; |
72d0e1cb SG |
370 | struct stat statbuf; |
371 | bool ret = false; | |
72d0e1cb SG |
372 | |
373 | if (!c) | |
374 | return false; | |
375 | ||
5cee8c50 | 376 | if (container_mem_lock(c)) |
72d0e1cb | 377 | return false; |
428ad142 | 378 | |
72d0e1cb | 379 | if (!c->configfile) |
428ad142 CB |
380 | goto on_error; |
381 | ||
72d0e1cb SG |
382 | statret = stat(c->configfile, &statbuf); |
383 | if (statret != 0) | |
428ad142 CB |
384 | goto on_error; |
385 | ||
72d0e1cb SG |
386 | ret = true; |
387 | ||
428ad142 | 388 | on_error: |
5cee8c50 | 389 | container_mem_unlock(c); |
72d0e1cb SG |
390 | return ret; |
391 | } | |
392 | ||
858377e4 SH |
393 | #define WRAP_API(rettype, fnname) \ |
394 | static rettype fnname(struct lxc_container *c) \ | |
395 | { \ | |
396 | rettype ret; \ | |
8164f0e2 TA |
397 | bool reset_config = false; \ |
398 | \ | |
399 | if (!current_config && c && c->lxc_conf) { \ | |
400 | current_config = c->lxc_conf; \ | |
401 | reset_config = true; \ | |
402 | } \ | |
403 | \ | |
858377e4 | 404 | ret = do_##fnname(c); \ |
8164f0e2 TA |
405 | if (reset_config) \ |
406 | current_config = NULL; \ | |
407 | \ | |
858377e4 SH |
408 | return ret; \ |
409 | } | |
410 | ||
411 | #define WRAP_API_1(rettype, fnname, t1) \ | |
412 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
413 | { \ | |
414 | rettype ret; \ | |
8164f0e2 TA |
415 | bool reset_config = false; \ |
416 | \ | |
417 | if (!current_config && c && c->lxc_conf) { \ | |
418 | current_config = c->lxc_conf; \ | |
419 | reset_config = true; \ | |
420 | } \ | |
421 | \ | |
858377e4 | 422 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
423 | if (reset_config) \ |
424 | current_config = NULL; \ | |
425 | \ | |
858377e4 SH |
426 | return ret; \ |
427 | } | |
428 | ||
429 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
430 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
431 | { \ | |
432 | rettype ret; \ | |
8164f0e2 TA |
433 | bool reset_config = false; \ |
434 | \ | |
435 | if (!current_config && c && c->lxc_conf) { \ | |
436 | current_config = c->lxc_conf; \ | |
437 | reset_config = true; \ | |
438 | } \ | |
439 | \ | |
858377e4 | 440 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
441 | if (reset_config) \ |
442 | current_config = NULL; \ | |
443 | \ | |
858377e4 SH |
444 | return ret; \ |
445 | } | |
446 | ||
447 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
448 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
449 | { \ | |
450 | rettype ret; \ | |
8164f0e2 TA |
451 | bool reset_config = false; \ |
452 | \ | |
453 | if (!current_config && c && c->lxc_conf) { \ | |
454 | current_config = c->lxc_conf; \ | |
455 | reset_config = true; \ | |
456 | } \ | |
457 | \ | |
858377e4 | 458 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
459 | if (reset_config) \ |
460 | current_config = NULL; \ | |
461 | \ | |
858377e4 SH |
462 | return ret; \ |
463 | } | |
464 | ||
29df56cd LT |
465 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
466 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
467 | t4 a4, t5 a5, t6 a6) \ | |
468 | { \ | |
469 | rettype ret; \ | |
470 | bool reset_config = false; \ | |
471 | \ | |
472 | if (!current_config && c && c->lxc_conf) { \ | |
473 | current_config = c->lxc_conf; \ | |
474 | reset_config = true; \ | |
475 | } \ | |
476 | \ | |
477 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
478 | if (reset_config) \ | |
479 | current_config = NULL; \ | |
480 | \ | |
481 | return ret; \ | |
482 | } | |
483 | ||
858377e4 SH |
484 | WRAP_API(bool, lxcapi_is_defined) |
485 | ||
486 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 487 | { |
72d0e1cb SG |
488 | lxc_state_t s; |
489 | ||
490 | if (!c) | |
491 | return NULL; | |
b547d79f | 492 | |
13f5be62 | 493 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 494 | return lxc_state2str(s); |
72d0e1cb SG |
495 | } |
496 | ||
858377e4 SH |
497 | WRAP_API(const char *, lxcapi_state) |
498 | ||
39dc698c | 499 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
500 | { |
501 | lxc_state_t s; | |
5bddcb62 | 502 | |
13f5be62 | 503 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
504 | return (s == STOPPED); |
505 | } | |
506 | ||
858377e4 | 507 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 508 | { |
72d0e1cb SG |
509 | if (!c) |
510 | return false; | |
1b61062f | 511 | |
9e630418 | 512 | return !is_stopped(c); |
72d0e1cb SG |
513 | } |
514 | ||
858377e4 SH |
515 | WRAP_API(bool, lxcapi_is_running) |
516 | ||
517 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb SG |
518 | { |
519 | int ret; | |
8787b387 | 520 | |
72d0e1cb SG |
521 | if (!c) |
522 | return false; | |
523 | ||
9123e471 | 524 | ret = lxc_freeze(c->name, c->config_path); |
5df46fad | 525 | if (ret < 0) |
72d0e1cb | 526 | return false; |
8787b387 | 527 | |
72d0e1cb SG |
528 | return true; |
529 | } | |
530 | ||
858377e4 SH |
531 | WRAP_API(bool, lxcapi_freeze) |
532 | ||
533 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb SG |
534 | { |
535 | int ret; | |
8e59e0ba | 536 | |
72d0e1cb SG |
537 | if (!c) |
538 | return false; | |
539 | ||
9123e471 | 540 | ret = lxc_unfreeze(c->name, c->config_path); |
e8989473 | 541 | if (ret < 0) |
72d0e1cb | 542 | return false; |
8e59e0ba | 543 | |
72d0e1cb SG |
544 | return true; |
545 | } | |
546 | ||
858377e4 SH |
547 | WRAP_API(bool, lxcapi_unfreeze) |
548 | ||
549 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 550 | { |
0115f8fd DE |
551 | if (!c) |
552 | return -1; | |
553 | ||
c86e2584 | 554 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
555 | } |
556 | ||
858377e4 SH |
557 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
558 | ||
b5159817 DE |
559 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
560 | int stdoutfd, int stderrfd, int escape) | |
561 | { | |
858377e4 SH |
562 | int ret; |
563 | ||
564 | if (!c) | |
565 | return -1; | |
566 | ||
567 | current_config = c->lxc_conf; | |
568 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
569 | current_config = NULL; | |
49cfedb3 | 570 | |
858377e4 | 571 | return ret; |
b5159817 DE |
572 | } |
573 | ||
191d43cc CB |
574 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
575 | { | |
576 | int ret; | |
577 | ||
578 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); | |
579 | if (ret < 0) { | |
580 | if (ret == -ENODATA) | |
63b74cda | 581 | NOTICE("The console log is empty"); |
191d43cc | 582 | else if (ret == -EFAULT) |
63b74cda CB |
583 | NOTICE("The container does not keep a console log"); |
584 | else if (ret == -ENOENT) | |
585 | NOTICE("The container does not keep a console log file"); | |
586 | else if (ret == -EIO) | |
587 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 588 | else |
63b74cda | 589 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
590 | } |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
595 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
596 | ||
858377e4 | 597 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 598 | { |
72d0e1cb SG |
599 | if (!c) |
600 | return -1; | |
601 | ||
5cee8c50 | 602 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
603 | } |
604 | ||
858377e4 SH |
605 | WRAP_API(pid_t, lxcapi_init_pid) |
606 | ||
12a50cc6 | 607 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
608 | { |
609 | if (!c->lxc_conf) | |
610 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 611 | |
6b0d5538 SH |
612 | if (!c->lxc_conf) |
613 | return false; | |
e3246ab9 | 614 | |
d08779d4 SH |
615 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
616 | return false; | |
e3246ab9 | 617 | |
c7b17051 | 618 | c->lxc_conf->name = c->name; |
d08779d4 | 619 | return true; |
8eb5694b SH |
620 | } |
621 | ||
858377e4 | 622 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 623 | { |
39dc698c | 624 | int lret; |
12a50cc6 | 625 | const char *fname; |
d03ab308 CB |
626 | bool need_disklock = false, ret = false; |
627 | ||
72d0e1cb SG |
628 | if (!c) |
629 | return false; | |
630 | ||
631 | fname = c->configfile; | |
a73846d8 | 632 | |
72d0e1cb SG |
633 | if (alt_file) |
634 | fname = alt_file; | |
a73846d8 | 635 | |
72d0e1cb SG |
636 | if (!fname) |
637 | return false; | |
d03ab308 CB |
638 | |
639 | /* If we're reading something other than the container's config, we only | |
640 | * need to lock the in-memory container. If loading the container's | |
641 | * config file, take the disk lock. | |
39dc698c SH |
642 | */ |
643 | if (strcmp(fname, c->configfile) == 0) | |
644 | need_disklock = true; | |
645 | ||
646 | if (need_disklock) | |
647 | lret = container_disk_lock(c); | |
648 | else | |
649 | lret = container_mem_lock(c); | |
650 | if (lret) | |
72d0e1cb | 651 | return false; |
39dc698c | 652 | |
8eb5694b | 653 | ret = load_config_locked(c, fname); |
39dc698c SH |
654 | |
655 | if (need_disklock) | |
656 | container_disk_unlock(c); | |
657 | else | |
658 | container_mem_unlock(c); | |
d03ab308 | 659 | |
72d0e1cb SG |
660 | return ret; |
661 | } | |
662 | ||
858377e4 SH |
663 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
664 | ||
665 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 666 | { |
497a2995 | 667 | if (!c || !c->lxc_conf) |
540f932a | 668 | return false; |
fb5999f6 CB |
669 | |
670 | if (container_mem_lock(c)) | |
540f932a | 671 | return false; |
fb5999f6 | 672 | |
a2739df5 | 673 | c->daemonize = state; |
d630991d | 674 | |
3bc449ed | 675 | container_mem_unlock(c); |
fb5999f6 | 676 | |
540f932a | 677 | return true; |
72d0e1cb SG |
678 | } |
679 | ||
858377e4 SH |
680 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
681 | ||
682 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
683 | { |
684 | if (!c || !c->lxc_conf) | |
49badbbe | 685 | return false; |
871ed23b CB |
686 | |
687 | if (container_mem_lock(c)) | |
49badbbe | 688 | return false; |
871ed23b | 689 | |
540f932a | 690 | c->lxc_conf->close_all_fds = state; |
d630991d | 691 | |
130a1888 | 692 | container_mem_unlock(c); |
871ed23b | 693 | |
49badbbe | 694 | return true; |
130a1888 ÇO |
695 | } |
696 | ||
858377e4 SH |
697 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
698 | ||
e202dfb8 CB |
699 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
700 | int timeout) | |
7a44c8b4 SG |
701 | { |
702 | int ret; | |
703 | ||
704 | if (!c) | |
705 | return false; | |
706 | ||
67e571de | 707 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
708 | return ret == 0; |
709 | } | |
710 | ||
858377e4 | 711 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 712 | |
2d834aa8 SH |
713 | static bool am_single_threaded(void) |
714 | { | |
2d834aa8 | 715 | DIR *dir; |
d630991d | 716 | struct dirent *direntp; |
6b0297e3 | 717 | int count = 0; |
2d834aa8 | 718 | |
2d834aa8 | 719 | dir = opendir("/proc/self/task"); |
6b0297e3 | 720 | if (!dir) |
2d834aa8 | 721 | return false; |
2d834aa8 | 722 | |
74f96976 | 723 | while ((direntp = readdir(dir))) { |
d630991d | 724 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
725 | continue; |
726 | ||
d630991d | 727 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 728 | continue; |
6b0297e3 | 729 | |
d630991d CB |
730 | count++; |
731 | if (count > 1) | |
2d834aa8 SH |
732 | break; |
733 | } | |
2d834aa8 | 734 | closedir(dir); |
6b0297e3 | 735 | |
2d834aa8 SH |
736 | return count == 1; |
737 | } | |
738 | ||
fd51a89b SH |
739 | static void push_arg(char ***argp, char *arg, int *nargs) |
740 | { | |
fd51a89b | 741 | char *copy; |
1452d3fe | 742 | char **argv; |
fd51a89b | 743 | |
d630991d | 744 | copy = must_copy_string(arg); |
1452d3fe | 745 | |
fd51a89b SH |
746 | do { |
747 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
748 | } while (!argv); | |
1452d3fe | 749 | |
fd51a89b SH |
750 | *argp = argv; |
751 | argv[*nargs] = copy; | |
752 | (*nargs)++; | |
753 | argv[*nargs] = NULL; | |
754 | } | |
755 | ||
756 | static char **split_init_cmd(const char *incmd) | |
757 | { | |
9de31d5a | 758 | size_t len, retlen; |
75bd13ab | 759 | char *copy, *p; |
fd51a89b | 760 | char **argv; |
75bd13ab | 761 | int nargs = 0; |
fd51a89b SH |
762 | |
763 | if (!incmd) | |
764 | return NULL; | |
765 | ||
766 | len = strlen(incmd) + 1; | |
767 | copy = alloca(len); | |
9de31d5a | 768 | retlen = strlcpy(copy, incmd, len); |
a73846d8 | 769 | if (retlen >= len) |
9de31d5a | 770 | return NULL; |
fd51a89b SH |
771 | |
772 | do { | |
773 | argv = malloc(sizeof(char *)); | |
774 | } while (!argv); | |
75bd13ab | 775 | |
fd51a89b | 776 | argv[0] = NULL; |
3c1f04cd | 777 | lxc_iterate_parts(p, copy, " ") |
fd51a89b SH |
778 | push_arg(&argv, p, &nargs); |
779 | ||
780 | if (nargs == 0) { | |
781 | free(argv); | |
782 | return NULL; | |
783 | } | |
75bd13ab | 784 | |
fd51a89b SH |
785 | return argv; |
786 | } | |
787 | ||
788 | static void free_init_cmd(char **argv) | |
789 | { | |
790 | int i = 0; | |
791 | ||
792 | if (!argv) | |
793 | return; | |
702bf732 | 794 | |
fd51a89b SH |
795 | while (argv[i]) |
796 | free(argv[i++]); | |
702bf732 | 797 | |
fd51a89b SH |
798 | free(argv); |
799 | } | |
800 | ||
5e5576a4 CB |
801 | static int lxc_rcv_status(int state_socket) |
802 | { | |
a73846d8 | 803 | int ret; |
804 | int state = -1; | |
5e5576a4 | 805 | |
ee8377bd | 806 | again: |
a73846d8 | 807 | /* Receive container state. */ |
808 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
809 | if (ret <= 0) { | |
ee8377bd CB |
810 | if (errno != EINTR) |
811 | return -1; | |
a73846d8 | 812 | |
ee8377bd CB |
813 | TRACE("Caught EINTR; retrying"); |
814 | goto again; | |
815 | } | |
5e5576a4 | 816 | |
a73846d8 | 817 | return state; |
5e5576a4 CB |
818 | } |
819 | ||
820 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
821 | { | |
a73846d8 | 822 | int ret, state; |
5e5576a4 | 823 | |
a73846d8 | 824 | /* Close write end of the socket pair. */ |
825 | close(handler->state_socket_pair[1]); | |
826 | handler->state_socket_pair[1] = -1; | |
5e5576a4 | 827 | |
a73846d8 | 828 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 829 | |
a73846d8 | 830 | /* Close read end of the socket pair. */ |
831 | close(handler->state_socket_pair[0]); | |
832 | handler->state_socket_pair[0] = -1; | |
5e5576a4 | 833 | |
a73846d8 | 834 | /* The first child is going to fork() again and then exits. So we reap |
835 | * the first child here. | |
836 | */ | |
01c1b11e CB |
837 | ret = wait_for_pid(pid); |
838 | if (ret < 0) | |
a73846d8 | 839 | DEBUG("Failed waiting on first child %d", pid); |
01c1b11e | 840 | else |
a73846d8 | 841 | DEBUG("First child %d exited", pid); |
5e5576a4 | 842 | |
a73846d8 | 843 | if (state < 0) { |
844 | SYSERROR("Failed to receive the container state"); | |
845 | return false; | |
846 | } | |
5e5576a4 | 847 | |
a73846d8 | 848 | /* If we receive anything else then running we know that the container |
849 | * failed to start. | |
850 | */ | |
851 | if (state != RUNNING) { | |
852 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
853 | lxc_state2str(state)); | |
854 | return false; | |
855 | } | |
5e5576a4 | 856 | |
a73846d8 | 857 | TRACE("Container is in \"RUNNING\" state"); |
858 | return true; | |
5e5576a4 CB |
859 | } |
860 | ||
858377e4 | 861 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
862 | { |
863 | int ret; | |
aa460476 | 864 | struct lxc_handler *handler; |
72d0e1cb | 865 | struct lxc_conf *conf; |
72d0e1cb SG |
866 | char *default_args[] = { |
867 | "/sbin/init", | |
13aad0ae | 868 | NULL, |
72d0e1cb | 869 | }; |
fd51a89b | 870 | char **init_cmd = NULL; |
c1a3e547 | 871 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 872 | |
7cb19d44 | 873 | /* container does exist */ |
72d0e1cb SG |
874 | if (!c) |
875 | return false; | |
120146b9 | 876 | |
7cb19d44 CB |
877 | /* If anything fails before we set error_num, we want an error in there. |
878 | */ | |
120146b9 SG |
879 | c->error_num = 1; |
880 | ||
7cb19d44 | 881 | /* Container has not been setup. */ |
72d0e1cb SG |
882 | if (!c->lxc_conf) |
883 | return false; | |
884 | ||
c47eafec CB |
885 | ret = ongoing_create(c); |
886 | if (ret < 0) { | |
7cb19d44 | 887 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 888 | return false; |
3e625e2d | 889 | } else if (ret == 1) { |
7cb19d44 | 890 | ERROR("Ongoing container creation detected"); |
3e625e2d | 891 | return false; |
c47eafec | 892 | } else if (ret == 2) { |
7cb19d44 | 893 | ERROR("Failed to create container"); |
c47eafec CB |
894 | do_lxcapi_destroy(c); |
895 | return false; | |
3e625e2d SH |
896 | } |
897 | ||
5cee8c50 | 898 | if (container_mem_lock(c)) |
72d0e1cb | 899 | return false; |
d630991d | 900 | |
72d0e1cb | 901 | conf = c->lxc_conf; |
72d0e1cb | 902 | |
aa460476 | 903 | /* initialize handler */ |
9640c6a7 | 904 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 905 | |
dbc9832d | 906 | container_mem_unlock(c); |
aa460476 CB |
907 | if (!handler) |
908 | return false; | |
909 | ||
fa30091b CB |
910 | if (!argv) { |
911 | if (useinit && conf->execute_cmd) | |
912 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
913 | else | |
914 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
915 | } | |
fd51a89b | 916 | |
7cb19d44 | 917 | /* ... otherwise use default_args. */ |
fa30091b | 918 | if (!argv) { |
e1e76423 CB |
919 | if (useinit) { |
920 | ERROR("No valid init detected"); | |
921 | lxc_free_handler(handler); | |
fa30091b | 922 | return false; |
e1e76423 CB |
923 | } |
924 | argv = default_args; | |
fa30091b | 925 | } |
72d0e1cb | 926 | |
7cb19d44 CB |
927 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
928 | * here to protect the on disk container? We don't want to exclude | |
929 | * things like lxc_info while the container is running. | |
930 | */ | |
9640c6a7 | 931 | if (c->daemonize) { |
a6b6ad7b | 932 | bool started; |
0a4be28d | 933 | char title[2048]; |
c47eafec | 934 | pid_t pid; |
71454076 | 935 | |
c47eafec | 936 | pid = fork(); |
f2e07cb6 | 937 | if (pid < 0) { |
c47eafec | 938 | free_init_cmd(init_cmd); |
f2e07cb6 | 939 | lxc_free_handler(handler); |
72d0e1cb | 940 | return false; |
f2e07cb6 | 941 | } |
6eaac303 | 942 | |
7cb19d44 | 943 | /* first parent */ |
6eaac303 QH |
944 | if (pid != 0) { |
945 | /* Set to NULL because we don't want father unlink | |
946 | * the PID file, child will do the free and unlink. | |
947 | */ | |
948 | c->pidfile = NULL; | |
5e5576a4 | 949 | |
7cb19d44 CB |
950 | /* Wait for container to tell us whether it started |
951 | * successfully. | |
952 | */ | |
a6b6ad7b CB |
953 | started = wait_on_daemonized_start(handler, pid); |
954 | ||
955 | free_init_cmd(init_cmd); | |
956 | lxc_free_handler(handler); | |
957 | return started; | |
6eaac303 | 958 | } |
025ed0f3 | 959 | |
7cb19d44 CB |
960 | /* first child */ |
961 | ||
0a4be28d | 962 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
963 | * characters. All that it means is that the proctitle will be |
964 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
965 | * */ | |
d630991d | 966 | (void)snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); |
0a4be28d | 967 | INFO("Attempting to set proc title to %s", title); |
d630991d | 968 | (void)setproctitle(title); |
0a4be28d | 969 | |
7cb19d44 CB |
970 | /* We fork() a second time to be reparented to init. Like |
971 | * POSIX's daemon() function we change to "/" and redirect | |
972 | * std{in,out,err} to /dev/null. | |
973 | */ | |
697fa639 SH |
974 | pid = fork(); |
975 | if (pid < 0) { | |
7cb19d44 | 976 | SYSERROR("Failed to fork first child process"); |
d608fbda | 977 | _exit(EXIT_FAILURE); |
697fa639 | 978 | } |
a6b6ad7b | 979 | |
7cb19d44 | 980 | /* second parent */ |
a6b6ad7b CB |
981 | if (pid != 0) { |
982 | free_init_cmd(init_cmd); | |
983 | lxc_free_handler(handler); | |
d608fbda | 984 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
985 | } |
986 | ||
7cb19d44 CB |
987 | /* second child */ |
988 | ||
989 | /* change to / directory */ | |
990 | ret = chdir("/"); | |
991 | if (ret < 0) { | |
992 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 993 | _exit(EXIT_FAILURE); |
c278cef2 | 994 | } |
7cb19d44 | 995 | |
c1a3e547 CB |
996 | keepfds[0] = handler->conf->maincmd_fd; |
997 | keepfds[1] = handler->state_socket_pair[0]; | |
998 | keepfds[2] = handler->state_socket_pair[1]; | |
999 | ret = lxc_check_inherited(conf, true, keepfds, | |
1000 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 1001 | if (ret < 0) |
d608fbda | 1002 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1003 | |
1004 | /* redirect std{in,out,err} to /dev/null */ | |
1005 | ret = null_stdfds(); | |
1006 | if (ret < 0) { | |
1007 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1008 | _exit(EXIT_FAILURE); |
69aeabac | 1009 | } |
7cb19d44 CB |
1010 | |
1011 | /* become session leader */ | |
1012 | ret = setsid(); | |
1013 | if (ret < 0) | |
0059379f | 1014 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
2d834aa8 SH |
1015 | } else { |
1016 | if (!am_single_threaded()) { | |
1017 | ERROR("Cannot start non-daemonized container when threaded"); | |
a6b6ad7b | 1018 | free_init_cmd(init_cmd); |
f2e07cb6 | 1019 | lxc_free_handler(handler); |
2d834aa8 SH |
1020 | return false; |
1021 | } | |
72d0e1cb SG |
1022 | } |
1023 | ||
aa460476 | 1024 | /* We need to write PID file after daemonize, so we always |
6eaac303 QH |
1025 | * write the right PID. |
1026 | */ | |
1027 | if (c->pidfile) { | |
7cea5905 CB |
1028 | int ret, w; |
1029 | char pidstr[LXC_NUMSTRLEN64]; | |
1030 | ||
1031 | w = snprintf(pidstr, LXC_NUMSTRLEN64, "%d", (int)lxc_raw_getpid()); | |
1032 | if (w < 0 || (size_t)w >= LXC_NUMSTRLEN64) { | |
c47eafec | 1033 | free_init_cmd(init_cmd); |
f2e07cb6 | 1034 | lxc_free_handler(handler); |
7cea5905 CB |
1035 | |
1036 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1037 | ||
9640c6a7 | 1038 | if (c->daemonize) |
d608fbda | 1039 | _exit(EXIT_FAILURE); |
7cea5905 | 1040 | |
6eaac303 QH |
1041 | return false; |
1042 | } | |
1043 | ||
7cea5905 CB |
1044 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1045 | if (ret < 0) { | |
c47eafec | 1046 | free_init_cmd(init_cmd); |
f2e07cb6 | 1047 | lxc_free_handler(handler); |
7cea5905 CB |
1048 | |
1049 | SYSERROR("Failed to write '%s'", c->pidfile); | |
1050 | ||
9640c6a7 | 1051 | if (c->daemonize) |
d608fbda | 1052 | _exit(EXIT_FAILURE); |
7cea5905 | 1053 | |
6eaac303 QH |
1054 | return false; |
1055 | } | |
6eaac303 QH |
1056 | } |
1057 | ||
80308d07 | 1058 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1059 | |
a8dfe4e0 WB |
1060 | /* Unshare the mount namespace if requested */ |
1061 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1062 | ret = unshare(CLONE_NEWNS); |
1063 | if (ret < 0) { | |
a8dfe4e0 | 1064 | SYSERROR("failed to unshare mount namespace"); |
f2e07cb6 | 1065 | lxc_free_handler(handler); |
a6b6ad7b | 1066 | ret = 1; |
7cb19d44 | 1067 | goto on_error; |
a8dfe4e0 | 1068 | } |
7cb19d44 CB |
1069 | |
1070 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1071 | if (ret < 0) { | |
a8dfe4e0 | 1072 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1073 | lxc_free_handler(handler); |
a6b6ad7b | 1074 | ret = 1; |
7cb19d44 | 1075 | goto on_error; |
a8dfe4e0 WB |
1076 | } |
1077 | } | |
1078 | ||
8bee8851 | 1079 | reboot: |
80308d07 | 1080 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1081 | /* initialize handler */ |
9640c6a7 | 1082 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1083 | if (!handler) { |
1084 | ret = 1; | |
7cb19d44 | 1085 | goto on_error; |
a6b6ad7b | 1086 | } |
aa460476 CB |
1087 | } |
1088 | ||
c1a3e547 CB |
1089 | keepfds[0] = handler->conf->maincmd_fd; |
1090 | keepfds[1] = handler->state_socket_pair[0]; | |
1091 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1092 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1093 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1094 | if (ret < 0) { |
f2e07cb6 | 1095 | lxc_free_handler(handler); |
d2cf4c37 | 1096 | ret = 1; |
7cb19d44 | 1097 | goto on_error; |
d2cf4c37 SH |
1098 | } |
1099 | ||
9605460f | 1100 | if (useinit) |
9640c6a7 CB |
1101 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1102 | c->daemonize, &c->error_num); | |
9605460f | 1103 | else |
9640c6a7 CB |
1104 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1105 | c->daemonize, &c->error_num); | |
72d0e1cb | 1106 | |
80308d07 | 1107 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1108 | INFO("Container requested reboot"); |
80308d07 | 1109 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1110 | goto reboot; |
1111 | } | |
1112 | ||
7cb19d44 | 1113 | on_error: |
487d8008 QH |
1114 | if (c->pidfile) { |
1115 | unlink(c->pidfile); | |
1116 | free(c->pidfile); | |
1117 | c->pidfile = NULL; | |
1118 | } | |
fd51a89b SH |
1119 | free_init_cmd(init_cmd); |
1120 | ||
9640c6a7 | 1121 | if (c->daemonize && ret != 0) |
d608fbda | 1122 | _exit(EXIT_FAILURE); |
9640c6a7 | 1123 | else if (c->daemonize) |
d608fbda | 1124 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1125 | |
1126 | if (ret != 0) | |
1127 | return false; | |
1128 | ||
1129 | return true; | |
72d0e1cb SG |
1130 | } |
1131 | ||
0c14779f CB |
1132 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1133 | char *const argv[]) | |
858377e4 SH |
1134 | { |
1135 | bool ret; | |
0c14779f | 1136 | |
858377e4 SH |
1137 | current_config = c ? c->lxc_conf : NULL; |
1138 | ret = do_lxcapi_start(c, useinit, argv); | |
1139 | current_config = NULL; | |
0c14779f | 1140 | |
858377e4 SH |
1141 | return ret; |
1142 | } | |
1143 | ||
9f52e331 | 1144 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1145 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1146 | { | |
1147 | va_list ap; | |
a0e93eeb | 1148 | char **inargs = NULL; |
72d0e1cb SG |
1149 | bool bret = false; |
1150 | ||
1151 | /* container exists */ | |
1152 | if (!c) | |
1153 | return false; | |
1154 | ||
858377e4 SH |
1155 | current_config = c->lxc_conf; |
1156 | ||
72d0e1cb | 1157 | va_start(ap, useinit); |
a0e93eeb | 1158 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1159 | va_end(ap); |
9f52e331 CB |
1160 | if (!inargs) |
1161 | goto on_error; | |
72d0e1cb | 1162 | |
a0e93eeb | 1163 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1164 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1165 | |
9f52e331 | 1166 | on_error: |
72d0e1cb | 1167 | if (inargs) { |
4e03ae57 | 1168 | char **arg; |
a73846d8 | 1169 | |
4e03ae57 DE |
1170 | for (arg = inargs; *arg; arg++) |
1171 | free(*arg); | |
72d0e1cb SG |
1172 | free(inargs); |
1173 | } | |
1174 | ||
858377e4 | 1175 | current_config = NULL; |
9f52e331 | 1176 | |
72d0e1cb SG |
1177 | return bret; |
1178 | } | |
1179 | ||
858377e4 | 1180 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1181 | { |
1182 | int ret; | |
1183 | ||
1184 | if (!c) | |
1185 | return false; | |
1186 | ||
ef6e34ee | 1187 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1188 | |
d775f21b | 1189 | return ret == 0; |
72d0e1cb SG |
1190 | } |
1191 | ||
858377e4 SH |
1192 | WRAP_API(bool, lxcapi_stop) |
1193 | ||
d5752559 SH |
1194 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1195 | { | |
78d44e5a CB |
1196 | int lasterr; |
1197 | size_t len; | |
1198 | char *p; | |
1199 | int ret = -1; | |
1200 | ||
d5752559 SH |
1201 | mode_t mask = umask(0002); |
1202 | ret = mkdir(path, 0770); | |
1203 | lasterr = errno; | |
1204 | umask(mask); | |
1205 | errno = lasterr; | |
1206 | if (ret) { | |
78d44e5a | 1207 | if (errno != EEXIST) |
d5752559 | 1208 | return -1; |
78d44e5a CB |
1209 | |
1210 | ret = 0; | |
d5752559 | 1211 | } |
78d44e5a CB |
1212 | |
1213 | len = strlen(path); | |
1214 | p = alloca(len + 1); | |
cbb9c7c7 DJ |
1215 | (void)strlcpy(p, path, len + 1); |
1216 | ||
78d44e5a CB |
1217 | if (!lxc_list_empty(&conf->id_map)) { |
1218 | ret = chown_mapped_root(p, conf); | |
1219 | if (ret < 0) | |
1220 | ret = -1; | |
d5752559 | 1221 | } |
78d44e5a | 1222 | |
d5752559 SH |
1223 | return ret; |
1224 | } | |
1225 | ||
dfa7eaeb | 1226 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1227 | static bool create_container_dir(struct lxc_container *c) |
1228 | { | |
dfa7eaeb CB |
1229 | int ret; |
1230 | size_t len; | |
72d0e1cb | 1231 | char *s; |
72d0e1cb | 1232 | |
2a59a681 | 1233 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1234 | s = malloc(len); |
1235 | if (!s) | |
1236 | return false; | |
dfa7eaeb | 1237 | |
2a59a681 | 1238 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1239 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1240 | free(s); |
1241 | return false; | |
1242 | } | |
dfa7eaeb | 1243 | |
d5752559 | 1244 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1245 | free(s); |
dfa7eaeb | 1246 | |
72d0e1cb SG |
1247 | return ret == 0; |
1248 | } | |
1249 | ||
10bc1861 CB |
1250 | /* do_storage_create: thin wrapper around storage_create(). Like |
1251 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1252 | */ |
10bc1861 CB |
1253 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1254 | const char *type, | |
1255 | struct bdev_specs *specs) | |
1897e3bc | 1256 | { |
e9e29a33 | 1257 | int ret; |
1897e3bc | 1258 | size_t len; |
e9e29a33 | 1259 | char *dest; |
10bc1861 | 1260 | struct lxc_storage *bdev; |
1897e3bc | 1261 | |
cd219ae6 | 1262 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1263 | if (c->lxc_conf->rootfs.path && |
1264 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1265 | const char *rpath = c->lxc_conf->rootfs.path; |
1266 | len = strlen(rpath) + 1; | |
cd219ae6 | 1267 | dest = alloca(len); |
cf465fe4 | 1268 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1269 | } else { |
858377e4 | 1270 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 SY |
1271 | len = strlen(c->name) + strlen(lxcpath) + 9; |
1272 | dest = alloca(len); | |
1273 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); | |
1274 | } | |
e9e29a33 | 1275 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1276 | return NULL; |
1277 | ||
10bc1861 | 1278 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1279 | if (!bdev) { |
e9e29a33 | 1280 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1281 | return NULL; |
d44e88c2 SH |
1282 | } |
1283 | ||
7a96a068 | 1284 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1285 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
f7ac4459 CB |
1286 | return NULL; |
1287 | } | |
cf3ef16d | 1288 | |
e9e29a33 CB |
1289 | /* If we are not root, chown the rootfs dir to root in the target user |
1290 | * namespace. | |
f7ac4459 | 1291 | */ |
e9e29a33 CB |
1292 | ret = geteuid(); |
1293 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1294 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1295 | if (ret < 0) { | |
1296 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1297 | suggest_default_idmap(); |
10bc1861 | 1298 | storage_put(bdev); |
cf3ef16d SH |
1299 | return NULL; |
1300 | } | |
1301 | } | |
1302 | ||
1897e3bc SH |
1303 | return bdev; |
1304 | } | |
1305 | ||
96b3cb40 | 1306 | static char *lxcbasename(char *path) |
72d0e1cb | 1307 | { |
47e55887 CB |
1308 | char *p; |
1309 | ||
1310 | p = path + strlen(path) - 1; | |
96b3cb40 SH |
1311 | while (*p != '/' && p > path) |
1312 | p--; | |
47e55887 | 1313 | |
96b3cb40 SH |
1314 | return p; |
1315 | } | |
72d0e1cb | 1316 | |
47e55887 CB |
1317 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1318 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1319 | { |
47e55887 | 1320 | int ret; |
96b3cb40 | 1321 | pid_t pid; |
72d0e1cb | 1322 | |
72d0e1cb | 1323 | if (!tpath) |
96b3cb40 | 1324 | return true; |
72d0e1cb SG |
1325 | |
1326 | pid = fork(); | |
1327 | if (pid < 0) { | |
7e34710e | 1328 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1329 | return false; |
72d0e1cb SG |
1330 | } |
1331 | ||
1a0e70ac | 1332 | if (pid == 0) { /* child */ |
47e55887 CB |
1333 | int i, len; |
1334 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1335 | char **newargv; |
47e55887 CB |
1336 | int nargs = 0; |
1337 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1338 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1339 | uid_t euid; |
72d0e1cb | 1340 | |
47e55887 CB |
1341 | if (need_null_stdfds) { |
1342 | ret = null_stdfds(); | |
1343 | if (ret < 0) | |
1344 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1345 | } |
1897e3bc | 1346 | |
8a388ed4 | 1347 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1348 | if (!bdev) { |
47e55887 | 1349 | ERROR("Failed to initialize storage"); |
7e34710e | 1350 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1351 | } |
1352 | ||
47e55887 CB |
1353 | euid = geteuid(); |
1354 | if (euid == 0) { | |
1355 | ret = unshare(CLONE_NEWNS); | |
1356 | if (ret < 0) { | |
1357 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1358 | _exit(EXIT_FAILURE); |
cf3ef16d | 1359 | } |
47e55887 CB |
1360 | |
1361 | ret = detect_shared_rootfs(); | |
1362 | if (ret == 1) { | |
1363 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1364 | if (ret < 0) { | |
1365 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1366 | ERROR("Continuing..."); |
1367 | } | |
1368 | } | |
1369 | } | |
47e55887 CB |
1370 | |
1371 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1372 | if (euid != 0) { | |
1373 | ERROR("Unprivileged users can only create " | |
1374 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1375 | _exit(EXIT_FAILURE); |
4de2791f | 1376 | } |
241978fa | 1377 | |
47e55887 CB |
1378 | if (strcmp(bdev->type, "overlay") == 0 || |
1379 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1380 | /* If we create an overlay container we need to |
1381 | * rsync the contents into | |
1382 | * <container-path>/<container-name>/rootfs. | |
1383 | * However, the overlay mount function will | |
1384 | * mount will mount | |
1385 | * <container-path>/<container-name>/delta0 | |
1386 | * over | |
1387 | * <container-path>/<container-name>/rootfs | |
1388 | * which means we would rsync the rootfs into | |
1389 | * the delta directory. That doesn't make sense | |
1390 | * since the delta directory only exists to | |
1391 | * record the differences to | |
1392 | * <container-path>/<container-name>/rootfs. So | |
1393 | * let's simply bind-mount here and then rsync | |
1394 | * directly into | |
1395 | * <container-path>/<container-name>/rootfs. | |
1396 | */ | |
1397 | char *src; | |
1398 | ||
1399 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1400 | if (!src) { | |
1401 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1402 | _exit(EXIT_FAILURE); |
241978fa CB |
1403 | } |
1404 | ||
1405 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1406 | if (ret < 0) { | |
1407 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1408 | _exit(EXIT_FAILURE); |
241978fa CB |
1409 | } |
1410 | } else { | |
47e55887 CB |
1411 | ret = bdev->ops->mount(bdev); |
1412 | if (ret < 0) { | |
241978fa | 1413 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1414 | _exit(EXIT_FAILURE); |
241978fa | 1415 | } |
cf3ef16d | 1416 | } |
1a0e70ac | 1417 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1418 | const char *src; |
f10fad2f | 1419 | free(bdev->dest); |
e9705550 CB |
1420 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1421 | bdev->dest = strdup(src); | |
1897e3bc SH |
1422 | } |
1423 | ||
47e55887 CB |
1424 | /* Create our new array, pre-pend the template name and base |
1425 | * args. | |
72d0e1cb SG |
1426 | */ |
1427 | if (argv) | |
a73846d8 | 1428 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1429 | ; |
a73846d8 | 1430 | |
47e55887 CB |
1431 | /* template, path, rootfs and name args */ |
1432 | nargs += 4; | |
cf3ef16d | 1433 | |
72d0e1cb SG |
1434 | newargv = malloc(nargs * sizeof(*newargv)); |
1435 | if (!newargv) | |
7e34710e | 1436 | _exit(EXIT_FAILURE); |
96b3cb40 | 1437 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 1438 | |
47e55887 | 1439 | /* --path */ |
2a59a681 | 1440 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1441 | patharg = malloc(len); |
1442 | if (!patharg) | |
7e34710e | 1443 | _exit(EXIT_FAILURE); |
a73846d8 | 1444 | |
2a59a681 | 1445 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1446 | if (ret < 0 || ret >= len) |
7e34710e | 1447 | _exit(EXIT_FAILURE); |
72d0e1cb | 1448 | newargv[1] = patharg; |
47e55887 CB |
1449 | |
1450 | /* --name */ | |
72d0e1cb SG |
1451 | len = strlen("--name=") + strlen(c->name) + 1; |
1452 | namearg = malloc(len); | |
1453 | if (!namearg) | |
7e34710e | 1454 | _exit(EXIT_FAILURE); |
a73846d8 | 1455 | |
72d0e1cb SG |
1456 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1457 | if (ret < 0 || ret >= len) | |
7e34710e | 1458 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1459 | newargv[2] = namearg; |
1460 | ||
47e55887 | 1461 | /* --rootfs */ |
1897e3bc SH |
1462 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1463 | rootfsarg = malloc(len); | |
1464 | if (!rootfsarg) | |
7e34710e | 1465 | _exit(EXIT_FAILURE); |
a73846d8 | 1466 | |
1897e3bc SH |
1467 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1468 | if (ret < 0 || ret >= len) | |
7e34710e | 1469 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1470 | newargv[3] = rootfsarg; |
1471 | ||
72d0e1cb SG |
1472 | /* add passed-in args */ |
1473 | if (argv) | |
1897e3bc | 1474 | for (i = 4; i < nargs; i++) |
47e55887 | 1475 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1476 | |
1477 | /* add trailing NULL */ | |
1478 | nargs++; | |
1479 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1480 | if (!newargv) | |
7e34710e | 1481 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1482 | newargv[nargs - 1] = NULL; |
1483 | ||
47e55887 CB |
1484 | /* If we're running the template in a mapped userns, then we |
1485 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1486 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1487 | * the mapped uid for our geteuid() | |
cf3ef16d | 1488 | */ |
0e6e3a41 | 1489 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1490 | int extraargs, hostuid_mapped, hostgid_mapped; |
1491 | char **n2; | |
1492 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1493 | struct lxc_list *it; |
1494 | struct id_map *map; | |
47e55887 | 1495 | int n2args = 1; |
cf3ef16d | 1496 | |
47e55887 CB |
1497 | n2 = malloc(n2args * sizeof(*n2)); |
1498 | if (!n2) | |
7e34710e | 1499 | _exit(EXIT_FAILURE); |
47e55887 | 1500 | |
cf3ef16d SH |
1501 | newargv[0] = tpath; |
1502 | tpath = "lxc-usernsexec"; | |
1503 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1504 | |
cf3ef16d SH |
1505 | lxc_list_for_each(it, &conf->id_map) { |
1506 | map = it->elem; | |
1507 | n2args += 2; | |
57d116ab | 1508 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1509 | if (!n2) |
7e34710e | 1510 | _exit(EXIT_FAILURE); |
47e55887 CB |
1511 | |
1512 | n2[n2args - 2] = "-m"; | |
1513 | n2[n2args - 1] = malloc(200); | |
1514 | if (!n2[n2args - 1]) | |
7e34710e | 1515 | _exit(EXIT_FAILURE); |
47e55887 CB |
1516 | |
1517 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1518 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1519 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1520 | if (ret < 0 || ret >= 200) |
7e34710e | 1521 | _exit(EXIT_FAILURE); |
cf3ef16d | 1522 | } |
47e55887 CB |
1523 | |
1524 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1525 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1526 | |
57d116ab | 1527 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1528 | if (!n2) |
7e34710e | 1529 | _exit(EXIT_FAILURE); |
47e55887 CB |
1530 | |
1531 | if (hostuid_mapped < 0) { | |
1532 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1533 | n2[n2args++] = "-m"; |
47e55887 CB |
1534 | if (hostuid_mapped < 0) { |
1535 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1536 | _exit(EXIT_FAILURE); |
cf3ef16d | 1537 | } |
47e55887 | 1538 | |
cf3ef16d | 1539 | n2[n2args++] = malloc(200); |
47e55887 | 1540 | if (!n2[n2args - 1]) { |
cf3ef16d | 1541 | SYSERROR("out of memory"); |
7e34710e | 1542 | _exit(EXIT_FAILURE); |
cf3ef16d | 1543 | } |
a73846d8 | 1544 | |
47e55887 CB |
1545 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1546 | hostuid_mapped, geteuid()); | |
1547 | if (ret < 0 || ret >= 200) | |
7e34710e | 1548 | _exit(EXIT_FAILURE); |
cf3ef16d | 1549 | } |
47e55887 CB |
1550 | |
1551 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1552 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1553 | |
2133f58c SH |
1554 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1555 | if (!n2) | |
7e34710e | 1556 | _exit(EXIT_FAILURE); |
47e55887 | 1557 | |
2133f58c | 1558 | if (hostgid_mapped < 0) { |
339efad9 | 1559 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1560 | n2[n2args++] = "-m"; |
1561 | if (hostgid_mapped < 0) { | |
47e55887 | 1562 | ERROR("Failed to find free gid to map"); |
7e34710e | 1563 | _exit(EXIT_FAILURE); |
2133f58c | 1564 | } |
47e55887 | 1565 | |
2133f58c | 1566 | n2[n2args++] = malloc(200); |
47e55887 | 1567 | if (!n2[n2args - 1]) { |
2133f58c | 1568 | SYSERROR("out of memory"); |
7e34710e | 1569 | _exit(EXIT_FAILURE); |
2133f58c | 1570 | } |
47e55887 CB |
1571 | |
1572 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1573 | hostgid_mapped, getegid()); | |
1574 | if (ret < 0 || ret >= 200) | |
7e34710e | 1575 | _exit(EXIT_FAILURE); |
2133f58c | 1576 | } |
a73846d8 | 1577 | |
cf3ef16d | 1578 | n2[n2args++] = "--"; |
a73846d8 | 1579 | |
cf3ef16d SH |
1580 | for (i = 0; i < nargs; i++) |
1581 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1582 | n2args += nargs; |
47e55887 CB |
1583 | |
1584 | /* Finally add "--mapped-uid $uid" to tell template what | |
1585 | * to chown cached images to. | |
1a0e70ac | 1586 | */ |
2133f58c | 1587 | n2args += 4; |
57d116ab | 1588 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1589 | if (!n2) |
7e34710e | 1590 | _exit(EXIT_FAILURE); |
47e55887 | 1591 | |
1a0e70ac | 1592 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1593 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1594 | |
1595 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1596 | if (ret < 0 || ret >= 20) { | |
1597 | free(newargv); | |
1598 | free(n2); | |
1599 | _exit(EXIT_FAILURE); | |
1600 | } | |
1601 | ||
47e55887 CB |
1602 | n2[n2args - 4] = txtuid; |
1603 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1604 | |
1f080b1d CB |
1605 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1606 | if (ret < 0 || ret >= 20) { | |
1607 | free(newargv); | |
1608 | free(n2); | |
1609 | _exit(EXIT_FAILURE); | |
1610 | } | |
4250ef64 | 1611 | |
47e55887 CB |
1612 | n2[n2args - 2] = txtgid; |
1613 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1614 | free(newargv); |
1615 | newargv = n2; | |
1616 | } | |
47e55887 | 1617 | |
cf3ef16d | 1618 | execvp(tpath, newargv); |
e9705550 | 1619 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1620 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1621 | } |
1622 | ||
47e55887 CB |
1623 | ret = wait_for_pid(pid); |
1624 | if (ret != 0) { | |
1625 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1626 | return false; |
1627 | } | |
1628 | ||
1629 | return true; | |
1630 | } | |
1631 | ||
74a3920a | 1632 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1633 | { |
1fd9bd50 | 1634 | long flen; |
630ac7c6 | 1635 | size_t len; |
b4569e93 | 1636 | char *contents; |
3ce74686 | 1637 | FILE *f; |
025ed0f3 | 1638 | int ret = -1; |
52026772 | 1639 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1640 | int i; |
3ce74686 | 1641 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1642 | char *tpath; |
52026772 | 1643 | #endif |
3ce74686 | 1644 | |
025ed0f3 | 1645 | f = fopen(path, "r"); |
025ed0f3 | 1646 | if (f == NULL) |
3ce74686 | 1647 | return false; |
025ed0f3 | 1648 | |
630ac7c6 CB |
1649 | ret = fseek(f, 0, SEEK_END); |
1650 | if (ret < 0) | |
025ed0f3 | 1651 | goto out_error; |
630ac7c6 CB |
1652 | |
1653 | ret = -1; | |
1654 | flen = ftell(f); | |
1655 | if (flen < 0) | |
025ed0f3 | 1656 | goto out_error; |
630ac7c6 CB |
1657 | |
1658 | ret = fseek(f, 0, SEEK_SET); | |
1659 | if (ret < 0) | |
025ed0f3 | 1660 | goto out_error; |
630ac7c6 CB |
1661 | |
1662 | ret = fseek(f, 0, SEEK_SET); | |
1663 | if (ret < 0) | |
1664 | goto out_error; | |
1665 | ||
1666 | ret = -1; | |
1667 | contents = malloc(flen + 1); | |
1668 | if (!contents) | |
025ed0f3 | 1669 | goto out_error; |
630ac7c6 CB |
1670 | |
1671 | len = fread(contents, 1, flen, f); | |
1672 | if (len != flen) | |
025ed0f3 SH |
1673 | goto out_free_contents; |
1674 | ||
3ce74686 | 1675 | contents[flen] = '\0'; |
a73846d8 | 1676 | |
025ed0f3 | 1677 | ret = fclose(f); |
025ed0f3 SH |
1678 | f = NULL; |
1679 | if (ret < 0) | |
1680 | goto out_free_contents; | |
3ce74686 | 1681 | |
b4569e93 | 1682 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1683 | tpath = get_template_path(t); |
85db5535 | 1684 | if (!tpath) { |
630ac7c6 | 1685 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1686 | goto out_free_contents; |
3ce74686 SH |
1687 | } |
1688 | ||
85db5535 DE |
1689 | ret = sha1sum_file(tpath, md_value); |
1690 | if (ret < 0) { | |
630ac7c6 | 1691 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1692 | free(tpath); |
85db5535 | 1693 | goto out_free_contents; |
3ce74686 | 1694 | } |
cef701ed | 1695 | free(tpath); |
3ce74686 SH |
1696 | #endif |
1697 | ||
025ed0f3 | 1698 | f = fopen(path, "w"); |
025ed0f3 | 1699 | if (f == NULL) { |
630ac7c6 | 1700 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1701 | free(contents); |
1702 | return false; | |
1703 | } | |
630ac7c6 | 1704 | |
3ce74686 SH |
1705 | fprintf(f, "# Template used to create this container: %s\n", t); |
1706 | if (argv) { | |
1707 | fprintf(f, "# Parameters passed to the template:"); | |
1708 | while (*argv) { | |
1709 | fprintf(f, " %s", *argv); | |
1710 | argv++; | |
1711 | } | |
1712 | fprintf(f, "\n"); | |
1713 | } | |
a73846d8 | 1714 | |
3ce74686 | 1715 | #if HAVE_LIBGNUTLS |
56698177 SH |
1716 | fprintf(f, "# Template script checksum (SHA-1): "); |
1717 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1718 | fprintf(f, "%02x", md_value[i]); | |
1719 | fprintf(f, "\n"); | |
3ce74686 | 1720 | #endif |
0520c252 | 1721 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1722 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1723 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1724 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1725 | if (fwrite(contents, 1, flen, f) != flen) { |
1726 | SYSERROR("Writing original contents"); | |
1727 | free(contents); | |
1728 | fclose(f); | |
1729 | return false; | |
1730 | } | |
630ac7c6 | 1731 | |
025ed0f3 | 1732 | ret = 0; |
630ac7c6 | 1733 | |
025ed0f3 | 1734 | out_free_contents: |
3ce74686 | 1735 | free(contents); |
630ac7c6 | 1736 | |
025ed0f3 SH |
1737 | out_error: |
1738 | if (f) { | |
1739 | int newret; | |
025ed0f3 | 1740 | newret = fclose(f); |
025ed0f3 SH |
1741 | if (ret == 0) |
1742 | ret = newret; | |
1743 | } | |
630ac7c6 | 1744 | |
025ed0f3 SH |
1745 | if (ret < 0) { |
1746 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1747 | return false; |
1748 | } | |
630ac7c6 | 1749 | |
3ce74686 SH |
1750 | return true; |
1751 | } | |
1752 | ||
4df7f012 SH |
1753 | static void lxcapi_clear_config(struct lxc_container *c) |
1754 | { | |
e62fd16f CB |
1755 | if (!c || !c->lxc_conf) |
1756 | return; | |
1757 | ||
1758 | lxc_conf_free(c->lxc_conf); | |
1759 | c->lxc_conf = NULL; | |
4df7f012 SH |
1760 | } |
1761 | ||
858377e4 SH |
1762 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1763 | ||
96b3cb40 SH |
1764 | /* |
1765 | * lxcapi_create: | |
1766 | * create a container with the given parameters. | |
1767 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1768 | * configuration already set | |
1769 | * @t: the template to execute to instantiate the root filesystem and | |
1770 | * adjust the configuration. | |
1771 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1772 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1773 | * use. | |
1774 | * | |
1775 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1776 | * arguments, you can just pass NULL. | |
1777 | */ | |
858377e4 | 1778 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1779 | const char *bdevtype, struct bdev_specs *specs, |
1780 | int flags, char *const argv[]) | |
96b3cb40 | 1781 | { |
e9e29a33 | 1782 | int partial_fd; |
51f0f73b | 1783 | mode_t mask; |
96b3cb40 | 1784 | pid_t pid; |
e9e29a33 | 1785 | bool ret = false; |
85db5535 | 1786 | char *tpath = NULL; |
96b3cb40 SH |
1787 | |
1788 | if (!c) | |
1789 | return false; | |
1790 | ||
85db5535 DE |
1791 | if (t) { |
1792 | tpath = get_template_path(t); | |
1793 | if (!tpath) { | |
e9e29a33 | 1794 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1795 | goto out; |
1796 | } | |
96b3cb40 SH |
1797 | } |
1798 | ||
e9e29a33 CB |
1799 | /* If a template is passed in, and the rootfs already is defined in the |
1800 | * container config and exists, then the caller is trying to create an | |
1801 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1802 | */ |
858377e4 | 1803 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1804 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1805 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1806 | c->config_path); | |
6c6892b5 | 1807 | goto free_tpath; |
cf465fe4 SH |
1808 | } |
1809 | ||
6c6892b5 | 1810 | if (!c->lxc_conf) { |
858377e4 | 1811 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1812 | ERROR("Error loading default configuration file %s", |
1813 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1814 | goto free_tpath; |
1815 | } | |
96b3cb40 SH |
1816 | } |
1817 | ||
6c6892b5 DE |
1818 | if (!create_container_dir(c)) |
1819 | goto free_tpath; | |
1820 | ||
e9e29a33 CB |
1821 | /* If both template and rootfs.path are set, template is setup as |
1822 | * rootfs.path. The container is already created if we have a config and | |
1823 | * rootfs.path is accessible | |
0590e82c | 1824 | */ |
00370edd | 1825 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1826 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1827 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1828 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1829 | goto out; |
1830 | } | |
1831 | ret = true; | |
0590e82c | 1832 | goto out; |
00370edd | 1833 | } |
e9e29a33 CB |
1834 | |
1835 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1836 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1837 | goto out; |
e9e29a33 | 1838 | |
858377e4 | 1839 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1840 | /* Rootfs already existed, user just wanted to save the loaded |
1841 | * configuration. | |
1842 | */ | |
0f4cdd77 | 1843 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1844 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1845 | |
0590e82c SH |
1846 | ret = true; |
1847 | goto out; | |
a69aad27 | 1848 | } |
96b3cb40 SH |
1849 | |
1850 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1851 | partial_fd = create_partial(c); |
1852 | if (partial_fd < 0) | |
96b3cb40 SH |
1853 | goto out; |
1854 | ||
e9e29a33 | 1855 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1856 | |
51f0f73b KR |
1857 | mask = umask(0022); |
1858 | ||
e9e29a33 | 1859 | /* Create the storage. |
96b3cb40 SH |
1860 | * Note we can't do this in the same task as we use to execute the |
1861 | * template because of the way zfs works. | |
1862 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1863 | * namespace. | |
1864 | */ | |
1865 | pid = fork(); | |
1866 | if (pid < 0) { | |
e9e29a33 | 1867 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1868 | goto out_unlock; |
1869 | } | |
1870 | ||
1a0e70ac | 1871 | if (pid == 0) { /* child */ |
10bc1861 | 1872 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1873 | |
10bc1861 CB |
1874 | bdev = do_storage_create(c, bdevtype, specs); |
1875 | if (!bdev) { | |
e9e29a33 CB |
1876 | ERROR("Failed to create %s storage for %s", |
1877 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1878 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1879 | } |
1880 | ||
e9e29a33 | 1881 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1882 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1883 | ERROR("Failed to save initial config for %s", c->name); |
1884 | /* Parent task won't see the storage driver in the | |
1885 | * config so we delete it. | |
1886 | */ | |
96b3cb40 SH |
1887 | bdev->ops->umount(bdev); |
1888 | bdev->ops->destroy(bdev); | |
85aec4ac | 1889 | _exit(EXIT_FAILURE); |
96b3cb40 | 1890 | } |
a73846d8 | 1891 | |
85aec4ac | 1892 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1893 | } |
a73846d8 | 1894 | |
96b3cb40 | 1895 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1896 | goto out_unlock; |
96b3cb40 | 1897 | |
e9e29a33 | 1898 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1899 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1900 | c->lxc_conf = NULL; |
a73846d8 | 1901 | |
96b3cb40 | 1902 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1903 | goto out_unlock; |
96b3cb40 | 1904 | |
dc23c1c8 | 1905 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1906 | goto out_unlock; |
1907 | ||
1a0e70ac CB |
1908 | /* Now clear out the lxc_conf we have, reload from the created |
1909 | * container. | |
1910 | */ | |
858377e4 | 1911 | do_lxcapi_clear_config(c); |
3ce74686 | 1912 | |
9d65a487 KY |
1913 | if (t) { |
1914 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1915 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1916 | goto out_unlock; |
1917 | } | |
3ce74686 | 1918 | } |
a73846d8 | 1919 | |
a69aad27 | 1920 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1921 | |
1922 | out_unlock: | |
51f0f73b | 1923 | umask(mask); |
3e625e2d SH |
1924 | if (partial_fd >= 0) |
1925 | remove_partial(c, partial_fd); | |
a73846d8 | 1926 | |
72d0e1cb | 1927 | out: |
c55d4505 | 1928 | if (!ret) |
17a367d8 | 1929 | container_destroy(c, NULL); |
a73846d8 | 1930 | |
6c6892b5 | 1931 | free_tpath: |
f10fad2f | 1932 | free(tpath); |
a69aad27 | 1933 | return ret; |
72d0e1cb SG |
1934 | } |
1935 | ||
858377e4 | 1936 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1937 | const char *bdevtype, struct bdev_specs *specs, |
1938 | int flags, char *const argv[]) | |
858377e4 SH |
1939 | { |
1940 | bool ret; | |
a73846d8 | 1941 | |
858377e4 | 1942 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1943 | |
858377e4 SH |
1944 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1945 | current_config = NULL; | |
1946 | return ret; | |
1947 | } | |
1948 | ||
1949 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1950 | { |
9dd54153 | 1951 | int ret; |
3e625e2d | 1952 | pid_t pid; |
dd267776 | 1953 | int rebootsignal = SIGINT; |
3e625e2d SH |
1954 | |
1955 | if (!c) | |
1956 | return false; | |
9dd54153 | 1957 | |
858377e4 | 1958 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1959 | return false; |
9dd54153 | 1960 | |
858377e4 | 1961 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1962 | if (pid <= 0) |
1963 | return false; | |
9dd54153 | 1964 | |
dd267776 BP |
1965 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1966 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
1967 | |
1968 | ret = kill(pid, rebootsignal); | |
1969 | if (ret < 0) { | |
1970 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 1971 | return false; |
591614a7 | 1972 | } |
3e625e2d | 1973 | |
9dd54153 | 1974 | return true; |
3e625e2d SH |
1975 | } |
1976 | ||
858377e4 SH |
1977 | WRAP_API(bool, lxcapi_reboot) |
1978 | ||
d39b10eb CB |
1979 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
1980 | { | |
1981 | int killret, ret; | |
1982 | pid_t pid; | |
1983 | int rebootsignal = SIGINT, state_client_fd = -1; | |
1984 | lxc_state_t states[MAX_STATE] = {0}; | |
1985 | ||
1986 | if (!c) | |
1987 | return false; | |
1988 | ||
1989 | if (!do_lxcapi_is_running(c)) | |
1990 | return true; | |
1991 | ||
1992 | pid = do_lxcapi_init_pid(c); | |
1993 | if (pid <= 0) | |
1994 | return true; | |
1995 | ||
1996 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
1997 | rebootsignal = c->lxc_conf->rebootsignal; | |
1998 | ||
1999 | /* Add a new state client before sending the shutdown signal so that we | |
2000 | * don't miss a state. | |
2001 | */ | |
2002 | if (timeout != 0) { | |
2003 | states[RUNNING] = 2; | |
2004 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2005 | &state_client_fd); | |
2006 | if (ret < 0) | |
2007 | return false; | |
2008 | ||
2009 | if (state_client_fd < 0) | |
2010 | return false; | |
2011 | ||
2012 | if (ret == RUNNING) | |
2013 | return true; | |
2014 | ||
2015 | if (ret < MAX_STATE) | |
2016 | return false; | |
2017 | } | |
2018 | ||
2019 | /* Send reboot signal to container. */ | |
2020 | killret = kill(pid, rebootsignal); | |
2021 | if (killret < 0) { | |
d39b10eb CB |
2022 | if (state_client_fd >= 0) |
2023 | close(state_client_fd); | |
a73846d8 | 2024 | |
9dd54153 | 2025 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2026 | return false; |
2027 | } | |
2028 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2029 | ||
a579fa51 | 2030 | if (timeout == 0) |
d39b10eb CB |
2031 | return true; |
2032 | ||
2033 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2034 | close(state_client_fd); | |
2035 | if (ret < 0) | |
2036 | return false; | |
2037 | ||
2038 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2039 | if (ret != RUNNING) | |
2040 | return false; | |
2041 | ||
2042 | return true; | |
2043 | } | |
2044 | ||
2045 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2046 | ||
858377e4 | 2047 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2048 | { |
f8bdb6dc | 2049 | int killret, ret; |
72d0e1cb | 2050 | pid_t pid; |
9dd54153 | 2051 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2052 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2053 | |
2054 | if (!c) | |
2055 | return false; | |
2056 | ||
858377e4 | 2057 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2058 | return true; |
f8bdb6dc | 2059 | |
858377e4 | 2060 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2061 | if (pid <= 0) |
2062 | return true; | |
330ae3d3 CB |
2063 | |
2064 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2065 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2066 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2067 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2068 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2069 | |
92e35018 CB |
2070 | /* Add a new state client before sending the shutdown signal so that we |
2071 | * don't miss a state. | |
2072 | */ | |
f8bdb6dc CB |
2073 | if (timeout != 0) { |
2074 | states[STOPPED] = 1; | |
2075 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2076 | &state_client_fd); | |
2077 | if (ret < 0) | |
2078 | return false; | |
92e35018 | 2079 | |
f8bdb6dc CB |
2080 | if (state_client_fd < 0) |
2081 | return false; | |
2082 | ||
2083 | if (ret == STOPPED) | |
2084 | return true; | |
591614a7 | 2085 | |
f8bdb6dc | 2086 | if (ret < MAX_STATE) |
92e35018 | 2087 | return false; |
92e35018 CB |
2088 | } |
2089 | ||
f8bdb6dc CB |
2090 | /* Send shutdown signal to container. */ |
2091 | killret = kill(pid, haltsignal); | |
2092 | if (killret < 0) { | |
f8bdb6dc CB |
2093 | if (state_client_fd >= 0) |
2094 | close(state_client_fd); | |
a73846d8 | 2095 | |
9dd54153 | 2096 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2097 | return false; |
2098 | } | |
2099 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2100 | ||
923929f6 | 2101 | if (timeout == 0) |
f8bdb6dc CB |
2102 | return true; |
2103 | ||
2104 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2105 | close(state_client_fd); | |
2106 | if (ret < 0) | |
2107 | return false; | |
2108 | ||
2109 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2110 | if (ret != STOPPED) | |
2111 | return false; | |
2112 | ||
2113 | return true; | |
72d0e1cb SG |
2114 | } |
2115 | ||
858377e4 SH |
2116 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2117 | ||
1897e3bc | 2118 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2119 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2120 | { |
2121 | bool bret = false; | |
a0e93eeb | 2122 | char **args = NULL; |
72d0e1cb | 2123 | va_list ap; |
72d0e1cb SG |
2124 | |
2125 | if (!c) | |
2126 | return false; | |
2127 | ||
858377e4 SH |
2128 | current_config = c->lxc_conf; |
2129 | ||
72d0e1cb SG |
2130 | /* |
2131 | * since we're going to wait for create to finish, I don't think we | |
2132 | * need to get a copy of the arguments. | |
2133 | */ | |
dc23c1c8 | 2134 | va_start(ap, flags); |
a0e93eeb | 2135 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2136 | va_end(ap); |
a0e93eeb | 2137 | if (!args) { |
e9e29a33 | 2138 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2139 | goto out; |
2140 | } | |
72d0e1cb | 2141 | |
858377e4 | 2142 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2143 | |
2144 | out: | |
a0e93eeb | 2145 | free(args); |
858377e4 | 2146 | current_config = NULL; |
72d0e1cb SG |
2147 | return bret; |
2148 | } | |
2149 | ||
6b0d5538 SH |
2150 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2151 | { | |
4222a9f4 CB |
2152 | if (!strcmp(key, "lxc.cgroup")) |
2153 | return clear_unexp_config_line(conf, key, true); | |
2154 | ||
2155 | if (!strcmp(key, "lxc.network")) | |
2156 | return clear_unexp_config_line(conf, key, true); | |
2157 | ||
2158 | if (!strcmp(key, "lxc.net")) | |
2159 | return clear_unexp_config_line(conf, key, true); | |
2160 | ||
2161 | /* Clear a network with a specific index. */ | |
2162 | if (!strncmp(key, "lxc.net.", 8)) { | |
2163 | int ret; | |
2164 | const char *idx; | |
2165 | ||
2166 | idx = key + 8; | |
2167 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2168 | if (!ret) | |
2169 | return clear_unexp_config_line(conf, key, true); | |
2170 | } | |
2171 | ||
2172 | if (!strcmp(key, "lxc.hook")) | |
2173 | return clear_unexp_config_line(conf, key, true); | |
2174 | ||
2175 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2176 | } |
2177 | ||
6afd673f CB |
2178 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2179 | const char *key) | |
72d0e1cb | 2180 | { |
6afd673f CB |
2181 | int ret = 1; |
2182 | struct lxc_config_t *config; | |
72d0e1cb SG |
2183 | |
2184 | if (!c || !c->lxc_conf) | |
2185 | return false; | |
6afd673f | 2186 | |
5cee8c50 | 2187 | if (container_mem_lock(c)) |
72d0e1cb | 2188 | return false; |
6afd673f | 2189 | |
300df83e | 2190 | config = lxc_get_config(key); |
6afd673f CB |
2191 | /* Verify that the config key exists and that it has a callback |
2192 | * implemented. | |
2193 | */ | |
2194 | if (config && config->clr) | |
26471403 | 2195 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2196 | |
6b0d5538 SH |
2197 | if (!ret) |
2198 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2199 | |
5cee8c50 | 2200 | container_mem_unlock(c); |
72d0e1cb SG |
2201 | return ret == 0; |
2202 | } | |
2203 | ||
858377e4 SH |
2204 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2205 | ||
e0f59189 | 2206 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2207 | { |
858377e4 | 2208 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2209 | |
a73846d8 | 2210 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2211 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2212 | if (!switch_to_ns(pid, "user")) |
2213 | return false; | |
a73846d8 | 2214 | |
51d0854c | 2215 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2216 | } |
2217 | ||
1a0e70ac | 2218 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2219 | static inline int string_cmp(char **first, char **second) |
2220 | { | |
2221 | return strcmp(*first, *second); | |
2222 | } | |
2223 | ||
1a0e70ac CB |
2224 | /* Used by qsort and bsearch functions for comparing container names. */ |
2225 | static inline int container_cmp(struct lxc_container **first, | |
2226 | struct lxc_container **second) | |
9c88ff1f ÇO |
2227 | { |
2228 | return strcmp((*first)->name, (*second)->name); | |
2229 | } | |
2230 | ||
2231 | static bool add_to_array(char ***names, char *cname, int pos) | |
2232 | { | |
2233 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2234 | if (!newnames) { | |
2235 | ERROR("Out of memory"); | |
2236 | return false; | |
2237 | } | |
2238 | ||
2239 | *names = newnames; | |
2240 | newnames[pos] = strdup(cname); | |
2241 | if (!newnames[pos]) | |
2242 | return false; | |
2243 | ||
1a0e70ac CB |
2244 | /* Sort the arrray as we will use binary search on it. */ |
2245 | qsort(newnames, pos + 1, sizeof(char *), | |
2246 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2247 | |
2248 | return true; | |
2249 | } | |
2250 | ||
1a0e70ac CB |
2251 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2252 | int pos, bool sort) | |
9c88ff1f | 2253 | { |
1a0e70ac | 2254 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2255 | if (!newlist) { |
2256 | ERROR("Out of memory"); | |
2257 | return false; | |
2258 | } | |
2259 | ||
2260 | *list = newlist; | |
2261 | newlist[pos] = c; | |
2262 | ||
1a0e70ac | 2263 | /* Sort the arrray as we will use binary search on it. */ |
2871830a | 2264 | if (sort) |
1a0e70ac CB |
2265 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2266 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2267 | |
2268 | return true; | |
2269 | } | |
2270 | ||
2271 | static char** get_from_array(char ***names, char *cname, int size) | |
2272 | { | |
2273 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2274 | } | |
2275 | ||
a73846d8 | 2276 | static bool array_contains(char ***names, char *cname, int size) |
2277 | { | |
9c88ff1f ÇO |
2278 | if(get_from_array(names, cname, size) != NULL) |
2279 | return true; | |
a73846d8 | 2280 | |
9c88ff1f ÇO |
2281 | return false; |
2282 | } | |
2283 | ||
2284 | static bool remove_from_array(char ***names, char *cname, int size) | |
2285 | { | |
2286 | char **result = get_from_array(names, cname, size); | |
2287 | if (result != NULL) { | |
2288 | free(result); | |
2289 | return true; | |
2290 | } | |
a73846d8 | 2291 | |
9c88ff1f ÇO |
2292 | return false; |
2293 | } | |
2294 | ||
9f4866a6 | 2295 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2296 | { |
ae22a220 ÇO |
2297 | pid_t pid; |
2298 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2299 | char **interfaces = NULL; |
ae22a220 | 2300 | char interface[IFNAMSIZ]; |
799f29ab | 2301 | |
0ac84f04 | 2302 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2303 | return NULL; |
c868b261 | 2304 | |
ae22a220 ÇO |
2305 | pid = fork(); |
2306 | if (pid < 0) { | |
9f4866a6 | 2307 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2308 | close(pipefd[0]); |
2309 | close(pipefd[1]); | |
2310 | return NULL; | |
2311 | } | |
799f29ab | 2312 | |
1a0e70ac | 2313 | if (pid == 0) { /* child */ |
ae22a220 ÇO |
2314 | int ret = 1, nbytes; |
2315 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
2316 | ||
2317 | /* close the read-end of the pipe */ | |
2318 | close(pipefd[0]); | |
2319 | ||
e0f59189 | 2320 | if (!enter_net_ns(c)) { |
9f4866a6 | 2321 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2322 | goto out; |
2323 | } | |
2324 | ||
2325 | /* Grab the list of interfaces */ | |
2326 | if (getifaddrs(&interfaceArray)) { | |
9f4866a6 | 2327 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2328 | goto out; |
2329 | } | |
2330 | ||
2331 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2332 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2333 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2334 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2335 | if (nbytes < 0) |
ae22a220 | 2336 | goto out; |
9f4866a6 | 2337 | |
ae22a220 ÇO |
2338 | count++; |
2339 | } | |
a73846d8 | 2340 | |
ae22a220 ÇO |
2341 | ret = 0; |
2342 | ||
2343 | out: | |
2344 | if (interfaceArray) | |
2345 | freeifaddrs(interfaceArray); | |
2346 | ||
2347 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2348 | close(pipefd[1]); | |
02c611b0 | 2349 | _exit(ret); |
799f29ab ÇO |
2350 | } |
2351 | ||
ae22a220 ÇO |
2352 | /* close the write-end of the pipe */ |
2353 | close(pipefd[1]); | |
2354 | ||
3e1e9db8 | 2355 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2356 | interface[IFNAMSIZ - 1] = '\0'; |
2357 | ||
ae22a220 | 2358 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2359 | continue; |
799f29ab | 2360 | |
9f4866a6 | 2361 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2362 | ERROR("Failed to add \"%s\" to array", interface); |
2363 | ||
9c88ff1f ÇO |
2364 | count++; |
2365 | } | |
799f29ab | 2366 | |
ae22a220 | 2367 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2368 | for (i = 0; i < count; i++) |
ae22a220 | 2369 | free(interfaces[i]); |
a73846d8 | 2370 | |
ae22a220 ÇO |
2371 | free(interfaces); |
2372 | interfaces = NULL; | |
2373 | } | |
9c88ff1f | 2374 | |
ae22a220 ÇO |
2375 | /* close the read-end of the pipe */ |
2376 | close(pipefd[0]); | |
799f29ab | 2377 | |
9c88ff1f | 2378 | /* Append NULL to the array */ |
9f4866a6 | 2379 | if (interfaces) |
9c88ff1f | 2380 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2381 | |
9c88ff1f | 2382 | return interfaces; |
799f29ab ÇO |
2383 | } |
2384 | ||
858377e4 SH |
2385 | WRAP_API(char **, lxcapi_get_interfaces) |
2386 | ||
02a0e184 CB |
2387 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2388 | const char *family, int scope) | |
799f29ab | 2389 | { |
02a0e184 | 2390 | int i, ret; |
ae22a220 | 2391 | pid_t pid; |
02a0e184 | 2392 | int pipefd[2]; |
ae22a220 | 2393 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2394 | int count = 0; |
2395 | char **addresses = NULL; | |
799f29ab | 2396 | |
0ac84f04 | 2397 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2398 | if (ret < 0) { |
2399 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2400 | return NULL; |
c868b261 ÇO |
2401 | } |
2402 | ||
ae22a220 ÇO |
2403 | pid = fork(); |
2404 | if (pid < 0) { | |
02a0e184 | 2405 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2406 | close(pipefd[0]); |
2407 | close(pipefd[1]); | |
2408 | return NULL; | |
9c83a661 SG |
2409 | } |
2410 | ||
02a0e184 CB |
2411 | if (pid == 0) { |
2412 | ssize_t nbytes; | |
ae22a220 | 2413 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
02a0e184 | 2414 | int ret = 1; |
ae22a220 | 2415 | char *address = NULL; |
02a0e184 CB |
2416 | void *tempAddrPtr = NULL; |
2417 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
fe218ca3 | 2418 | |
ae22a220 ÇO |
2419 | /* close the read-end of the pipe */ |
2420 | close(pipefd[0]); | |
2421 | ||
e0f59189 | 2422 | if (!enter_net_ns(c)) { |
02a0e184 | 2423 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2424 | goto out; |
9c83a661 | 2425 | } |
ae22a220 ÇO |
2426 | |
2427 | /* Grab the list of interfaces */ | |
2428 | if (getifaddrs(&interfaceArray)) { | |
02a0e184 | 2429 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2430 | goto out; |
2431 | } | |
2432 | ||
2433 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2434 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2435 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2436 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2437 | continue; |
2438 | ||
02a0e184 | 2439 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2440 | if (family && strcmp(family, "inet")) |
2441 | continue; | |
02a0e184 | 2442 | |
ae22a220 | 2443 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2444 | } else { |
ae22a220 ÇO |
2445 | if (family && strcmp(family, "inet6")) |
2446 | continue; | |
2447 | ||
2448 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2449 | continue; | |
2450 | ||
2451 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2452 | } | |
2453 | ||
2454 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) | |
2455 | continue; | |
2456 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2457 | continue; |
2458 | ||
ae22a220 | 2459 | address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2460 | tempAddrPtr, addressOutputBuffer, |
2461 | sizeof(addressOutputBuffer)); | |
ae22a220 | 2462 | if (!address) |
02a0e184 | 2463 | continue; |
ae22a220 | 2464 | |
02a0e184 CB |
2465 | nbytes = lxc_write_nointr(pipefd[1], address, INET6_ADDRSTRLEN); |
2466 | if (nbytes != INET6_ADDRSTRLEN) { | |
2467 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
2468 | address); | |
ae22a220 ÇO |
2469 | goto out; |
2470 | } | |
a73846d8 | 2471 | |
ae22a220 | 2472 | count++; |
9c83a661 | 2473 | } |
a73846d8 | 2474 | |
ae22a220 | 2475 | ret = 0; |
9c83a661 | 2476 | |
ae22a220 | 2477 | out: |
02a0e184 | 2478 | if (interfaceArray) |
ae22a220 | 2479 | freeifaddrs(interfaceArray); |
9c83a661 | 2480 | |
ae22a220 ÇO |
2481 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2482 | close(pipefd[1]); | |
fe1ce58c | 2483 | _exit(ret); |
6849cb5b | 2484 | } |
9c83a661 | 2485 | |
ae22a220 ÇO |
2486 | /* close the write-end of the pipe */ |
2487 | close(pipefd[1]); | |
2488 | ||
02a0e184 CB |
2489 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2490 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2491 | ||
2492 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2493 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2494 | |
9c88ff1f | 2495 | count++; |
9c83a661 SG |
2496 | } |
2497 | ||
ae22a220 | 2498 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2499 | for (i = 0; i < count; i++) |
ae22a220 | 2500 | free(addresses[i]); |
02a0e184 | 2501 | |
ae22a220 ÇO |
2502 | free(addresses); |
2503 | addresses = NULL; | |
2504 | } | |
9c83a661 | 2505 | |
ae22a220 ÇO |
2506 | /* close the read-end of the pipe */ |
2507 | close(pipefd[0]); | |
9c83a661 SG |
2508 | |
2509 | /* Append NULL to the array */ | |
02a0e184 | 2510 | if (addresses) |
9c88ff1f | 2511 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2512 | |
2513 | return addresses; | |
2514 | } | |
2515 | ||
858377e4 SH |
2516 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2517 | ||
2518 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2519 | { |
fce687aa CB |
2520 | int ret = -1; |
2521 | struct lxc_config_t *config; | |
72d0e1cb SG |
2522 | |
2523 | if (!c || !c->lxc_conf) | |
2524 | return -1; | |
fce687aa | 2525 | |
5cee8c50 | 2526 | if (container_mem_lock(c)) |
72d0e1cb | 2527 | return -1; |
fce687aa | 2528 | |
300df83e | 2529 | config = lxc_get_config(key); |
fce687aa CB |
2530 | /* Verify that the config key exists and that it has a callback |
2531 | * implemented. | |
2532 | */ | |
2533 | if (config && config->get) | |
cccd2219 | 2534 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2535 | |
5cee8c50 | 2536 | container_mem_unlock(c); |
72d0e1cb SG |
2537 | return ret; |
2538 | } | |
2539 | ||
858377e4 SH |
2540 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2541 | ||
2542 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2543 | { |
2544 | char *ret; | |
2545 | ||
2546 | if (!c || !c->lxc_conf) | |
2547 | return NULL; | |
a73846d8 | 2548 | |
8ac18377 ÇO |
2549 | if (container_mem_lock(c)) |
2550 | return NULL; | |
a73846d8 | 2551 | |
858377e4 | 2552 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2553 | container_mem_unlock(c); |
2554 | return ret; | |
2555 | } | |
2556 | ||
858377e4 SH |
2557 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2558 | ||
2559 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2560 | { |
300df83e CB |
2561 | int ret = -1; |
2562 | ||
2563 | /* List all config items. */ | |
72d0e1cb | 2564 | if (!key) |
cfc67626 | 2565 | return lxc_list_config_items(retv, inlen); |
300df83e | 2566 | |
72d0e1cb SG |
2567 | if (!c || !c->lxc_conf) |
2568 | return -1; | |
300df83e | 2569 | |
5cee8c50 | 2570 | if (container_mem_lock(c)) |
72d0e1cb | 2571 | return -1; |
300df83e CB |
2572 | |
2573 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2574 | * This is an intelligent result to show which keys are valid given the | |
2575 | * type of nic it is. | |
2576 | */ | |
6fba98b5 | 2577 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2578 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2579 | else |
2580 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2581 | |
5cee8c50 | 2582 | container_mem_unlock(c); |
72d0e1cb SG |
2583 | return ret; |
2584 | } | |
2585 | ||
858377e4 SH |
2586 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2587 | ||
2588 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2589 | { |
0e1a60b0 | 2590 | int fd, lret; |
39dc698c | 2591 | bool ret = false, need_disklock = false; |
39dc698c | 2592 | |
72d0e1cb SG |
2593 | if (!alt_file) |
2594 | alt_file = c->configfile; | |
a73846d8 | 2595 | |
72d0e1cb | 2596 | if (!alt_file) |
1a0e70ac | 2597 | return false; |
39dc698c | 2598 | |
1a0e70ac | 2599 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2600 | if (!c->lxc_conf) { |
858377e4 | 2601 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2602 | ERROR("Error loading default configuration file %s " |
2603 | "while saving %s", | |
2604 | lxc_global_config_value("lxc.default_config"), | |
2605 | c->name); | |
72d0e1cb SG |
2606 | return false; |
2607 | } | |
39dc698c | 2608 | } |
72d0e1cb | 2609 | |
5a3d2e1e SG |
2610 | if (!create_container_dir(c)) |
2611 | return false; | |
2612 | ||
1a0e70ac CB |
2613 | /* If we're writing to the container's config file, take the disk lock. |
2614 | * Otherwise just take the memlock to protect the struct lxc_container | |
2615 | * while we're traversing it. | |
39dc698c SH |
2616 | */ |
2617 | if (strcmp(c->configfile, alt_file) == 0) | |
2618 | need_disklock = true; | |
2619 | ||
2620 | if (need_disklock) | |
2621 | lret = container_disk_lock(c); | |
2622 | else | |
2623 | lret = container_mem_lock(c); | |
39dc698c | 2624 | if (lret) |
72d0e1cb | 2625 | return false; |
39dc698c | 2626 | |
10034af5 | 2627 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
0e1a60b0 CB |
2628 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
2629 | if (fd < 0) | |
2630 | goto on_error; | |
2631 | ||
2632 | lret = write_config(fd, c->lxc_conf); | |
2633 | close(fd); | |
2634 | if (lret < 0) | |
2635 | goto on_error; | |
2636 | ||
39dc698c SH |
2637 | ret = true; |
2638 | ||
0e1a60b0 | 2639 | on_error: |
39dc698c SH |
2640 | if (need_disklock) |
2641 | container_disk_unlock(c); | |
2642 | else | |
2643 | container_mem_unlock(c); | |
0e1a60b0 | 2644 | |
39dc698c | 2645 | return ret; |
72d0e1cb SG |
2646 | } |
2647 | ||
858377e4 SH |
2648 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2649 | ||
0ea055b3 CB |
2650 | |
2651 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2652 | { |
0ea055b3 CB |
2653 | FILE *f1; |
2654 | struct stat fbuf; | |
42342bed CB |
2655 | void *buf = NULL; |
2656 | char *del = NULL; | |
dfb31b25 | 2657 | char path[MAXPATHLEN]; |
0ea055b3 CB |
2658 | char newpath[MAXPATHLEN]; |
2659 | int fd, ret, n = 0, v = 0; | |
dfb31b25 | 2660 | bool bret = false; |
42342bed | 2661 | size_t len = 0, bytes = 0; |
dfb31b25 | 2662 | |
0ea055b3 | 2663 | if (container_disk_lock(c0)) |
dfb31b25 | 2664 | return false; |
0ea055b3 CB |
2665 | |
2666 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c0->config_path, c0->name); | |
dfb31b25 SH |
2667 | if (ret < 0 || ret > MAXPATHLEN) |
2668 | goto out; | |
a73846d8 | 2669 | |
0ea055b3 CB |
2670 | ret = snprintf(newpath, MAXPATHLEN, "%s\n%s\n", c->config_path, c->name); |
2671 | if (ret < 0 || ret > MAXPATHLEN) | |
dfb31b25 | 2672 | goto out; |
0ea055b3 CB |
2673 | |
2674 | /* If we find an lxc-snapshot file using the old format only listing the | |
2675 | * number of snapshots we will keep using it. */ | |
2676 | f1 = fopen(path, "r"); | |
2677 | if (f1) { | |
2678 | n = fscanf(f1, "%d", &v); | |
2679 | fclose(f1); | |
2680 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2681 | ret = remove(path); |
2682 | if (ret < 0) | |
6d1400b5 | 2683 | SYSERROR("Failed to remove \"%s\"", path); |
2684 | ||
0ea055b3 CB |
2685 | n = 0; |
2686 | } | |
dfb31b25 | 2687 | } |
6d1400b5 | 2688 | |
0ea055b3 CB |
2689 | if (n == 1) { |
2690 | v += inc ? 1 : -1; | |
2691 | f1 = fopen(path, "w"); | |
2692 | if (!f1) | |
2693 | goto out; | |
6d1400b5 | 2694 | |
0ea055b3 CB |
2695 | if (fprintf(f1, "%d\n", v) < 0) { |
2696 | ERROR("Error writing new snapshots value"); | |
2697 | fclose(f1); | |
2698 | goto out; | |
2699 | } | |
6d1400b5 | 2700 | |
0ea055b3 CB |
2701 | ret = fclose(f1); |
2702 | if (ret != 0) { | |
2703 | SYSERROR("Error writing to or closing snapshots file"); | |
2704 | goto out; | |
2705 | } | |
2706 | } else { | |
2707 | /* Here we know that we have or can use an lxc-snapshot file | |
2708 | * using the new format. */ | |
2709 | if (inc) { | |
2710 | f1 = fopen(path, "a"); | |
2711 | if (!f1) | |
2712 | goto out; | |
2713 | ||
2714 | if (fprintf(f1, "%s", newpath) < 0) { | |
2715 | ERROR("Error writing new snapshots entry"); | |
2716 | ret = fclose(f1); | |
2717 | if (ret != 0) | |
2718 | SYSERROR("Error writing to or closing snapshots file"); | |
2719 | goto out; | |
2720 | } | |
2721 | ||
2722 | ret = fclose(f1); | |
2723 | if (ret != 0) { | |
2724 | SYSERROR("Error writing to or closing snapshots file"); | |
2725 | goto out; | |
2726 | } | |
2727 | } else if (!inc) { | |
d028235d SG |
2728 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2729 | goto out; | |
2730 | ||
2731 | if (fstat(fd, &fbuf) < 0) { | |
2732 | close(fd); | |
2733 | goto out; | |
2734 | } | |
2735 | ||
2736 | if (fbuf.st_size != 0) { | |
25086a5f | 2737 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2738 | if (buf == MAP_FAILED) { |
2739 | SYSERROR("Failed to create mapping %s", path); | |
2740 | close(fd); | |
2741 | goto out; | |
2742 | } | |
2743 | ||
2744 | len = strlen(newpath); | |
2745 | while ((del = strstr((char *)buf, newpath))) { | |
2746 | memmove(del, del + len, strlen(del) - len + 1); | |
2747 | bytes += len; | |
2748 | } | |
2749 | ||
25086a5f | 2750 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2751 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2752 | SYSERROR("Failed to truncate file %s", path); | |
2753 | close(fd); | |
2754 | goto out; | |
2755 | } | |
2756 | } | |
a73846d8 | 2757 | |
d028235d SG |
2758 | close(fd); |
2759 | } | |
0ea055b3 CB |
2760 | |
2761 | /* If the lxc-snapshot file is empty, remove it. */ | |
2762 | if (stat(path, &fbuf) < 0) | |
2763 | goto out; | |
6d1400b5 | 2764 | |
d028235d | 2765 | if (!fbuf.st_size) { |
71261a5c CB |
2766 | ret = remove(path); |
2767 | if (ret < 0) | |
2768 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2769 | } |
dfb31b25 SH |
2770 | } |
2771 | ||
2772 | bret = true; | |
2773 | ||
2774 | out: | |
0ea055b3 | 2775 | container_disk_unlock(c0); |
dfb31b25 SH |
2776 | return bret; |
2777 | } | |
2778 | ||
d825fff3 | 2779 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2780 | { |
2781 | struct lxc_container *p; | |
2782 | char *lxcpath = NULL, *lxcname = NULL, path[MAXPATHLEN]; | |
2783 | size_t pathlen = 0, namelen = 0; | |
2784 | FILE *f; | |
2785 | int ret; | |
2786 | ||
2787 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", | |
2788 | c->config_path, c->name); | |
2789 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2790 | ERROR("Path name too long"); | |
2791 | return; | |
2792 | } | |
a73846d8 | 2793 | |
025ed0f3 | 2794 | f = fopen(path, "r"); |
025ed0f3 | 2795 | if (f == NULL) |
dfb31b25 | 2796 | return; |
a73846d8 | 2797 | |
dfb31b25 SH |
2798 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2799 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2800 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2801 | goto out; |
2802 | } | |
7ad37670 CB |
2803 | |
2804 | remove_trailing_newlines(lxcpath); | |
2805 | remove_trailing_newlines(lxcname); | |
2806 | ||
dfb31b25 SH |
2807 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2808 | ERROR("Unable to find dependent container %s:%s", | |
2809 | lxcpath, lxcname); | |
2810 | continue; | |
2811 | } | |
a73846d8 | 2812 | |
0ea055b3 CB |
2813 | if (!mod_rdep(p, c, inc)) |
2814 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2815 | lxcpath, lxcname); |
a73846d8 | 2816 | |
dfb31b25 SH |
2817 | lxc_container_put(p); |
2818 | } | |
a73846d8 | 2819 | |
dfb31b25 | 2820 | out: |
f10fad2f ME |
2821 | free(lxcpath); |
2822 | free(lxcname); | |
dfb31b25 SH |
2823 | fclose(f); |
2824 | } | |
2825 | ||
18aa217b | 2826 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2827 | { |
0ea055b3 | 2828 | FILE *f; |
dfb31b25 SH |
2829 | char path[MAXPATHLEN]; |
2830 | int ret, v; | |
0ea055b3 | 2831 | struct stat fbuf; |
dfb31b25 SH |
2832 | bool bret = false; |
2833 | ||
2834 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
2835 | c->name); | |
2836 | if (ret < 0 || ret > MAXPATHLEN) | |
2837 | goto out; | |
a73846d8 | 2838 | |
0ea055b3 CB |
2839 | /* If the file doesn't exist there are no snapshots. */ |
2840 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2841 | goto out; |
a73846d8 | 2842 | |
0ea055b3 CB |
2843 | v = fbuf.st_size; |
2844 | if (v != 0) { | |
2845 | f = fopen(path, "r"); | |
2846 | if (!f) | |
2847 | goto out; | |
a73846d8 | 2848 | |
0ea055b3 CB |
2849 | ret = fscanf(f, "%d", &v); |
2850 | fclose(f); | |
1a0e70ac | 2851 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2852 | if (ret != 1) |
2853 | INFO("Container uses new lxc-snapshots format %s", path); | |
2854 | } | |
a73846d8 | 2855 | |
dfb31b25 SH |
2856 | bret = v != 0; |
2857 | ||
2858 | out: | |
2859 | return bret; | |
2860 | } | |
2861 | ||
18aa217b SH |
2862 | static bool has_snapshots(struct lxc_container *c) |
2863 | { | |
2864 | char path[MAXPATHLEN]; | |
74f96976 | 2865 | struct dirent *direntp; |
18aa217b SH |
2866 | int count=0; |
2867 | DIR *dir; | |
2868 | ||
2869 | if (!get_snappath_dir(c, path)) | |
2870 | return false; | |
a73846d8 | 2871 | |
18aa217b SH |
2872 | dir = opendir(path); |
2873 | if (!dir) | |
2874 | return false; | |
a73846d8 | 2875 | |
74f96976 | 2876 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2877 | if (!strcmp(direntp->d_name, ".")) |
2878 | continue; | |
2879 | ||
2880 | if (!strcmp(direntp->d_name, "..")) | |
2881 | continue; | |
2882 | count++; | |
2883 | break; | |
2884 | } | |
a73846d8 | 2885 | |
18aa217b SH |
2886 | closedir(dir); |
2887 | return count > 0; | |
2888 | } | |
2889 | ||
297c2d58 | 2890 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2891 | int ret; |
2892 | ||
e0010464 | 2893 | if (am_guest_unpriv()) { |
ee484f7f CB |
2894 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2895 | "storage_destroy_wrapper"); | |
2896 | if (ret < 0) | |
d028235d | 2897 | return false; |
ee484f7f | 2898 | |
d028235d SG |
2899 | return true; |
2900 | } | |
ee484f7f | 2901 | |
10bc1861 | 2902 | return storage_destroy(conf); |
297c2d58 CB |
2903 | } |
2904 | ||
4355ab5f SH |
2905 | static int lxc_rmdir_onedev_wrapper(void *data) |
2906 | { | |
2907 | char *arg = (char *) data; | |
18aa217b | 2908 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2909 | } |
2910 | ||
17a367d8 | 2911 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2912 | { |
17a367d8 CB |
2913 | char *arg = data; |
2914 | return unlink(arg); | |
2915 | } | |
2916 | ||
2917 | static bool container_destroy(struct lxc_container *c, | |
2918 | struct lxc_storage *storage) | |
2919 | { | |
2920 | const char *p1; | |
2921 | size_t len; | |
2922 | struct lxc_conf *conf; | |
2923 | char *path = NULL; | |
c868b261 | 2924 | bool bret = false; |
297c2d58 | 2925 | int ret = 0; |
72d0e1cb | 2926 | |
858377e4 | 2927 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2928 | return false; |
2929 | ||
a70a69e8 | 2930 | conf = c->lxc_conf; |
3bc449ed | 2931 | if (container_disk_lock(c)) |
72d0e1cb | 2932 | return false; |
72d0e1cb | 2933 | |
39dc698c | 2934 | if (!is_stopped(c)) { |
1a0e70ac | 2935 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2936 | ERROR("container %s is not stopped", c->name); |
2937 | goto out; | |
72d0e1cb SG |
2938 | } |
2939 | ||
a70a69e8 | 2940 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2941 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2942 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2943 | SYSERROR("Failed to set environment variable for container name"); |
2944 | ||
2945 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2946 | SYSERROR("Failed to set environment variable for config path"); | |
2947 | ||
2948 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2949 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2950 | ||
2951 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2952 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2953 | ||
2954 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2955 | SYSERROR("Failed to set environment variable for console path"); | |
2956 | ||
2957 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2958 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2959 | /* End of environment variable setup for hooks */ |
2960 | ||
14a7b0f9 | 2961 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2962 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2963 | goto out; |
2964 | } | |
2965 | } | |
2966 | ||
2967 | if (current_config && conf == current_config) { | |
858377e4 | 2968 | current_config = NULL; |
a73846d8 | 2969 | |
37cf711b SY |
2970 | if (conf->logfd != -1) { |
2971 | close(conf->logfd); | |
2972 | conf->logfd = -1; | |
858377e4 SH |
2973 | } |
2974 | } | |
2975 | ||
6e54330c CB |
2976 | /* LXC is not managing the storage of the container. */ |
2977 | if (conf && !conf->rootfs.managed) | |
2978 | goto on_success; | |
2979 | ||
d028235d SG |
2980 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
2981 | if (!do_destroy_container(conf)) { | |
2982 | ERROR("Error destroying rootfs for %s", c->name); | |
2983 | goto out; | |
2984 | } | |
2985 | INFO("Destroyed rootfs for %s", c->name); | |
2986 | } | |
60bf62d4 | 2987 | |
dfb31b25 SH |
2988 | mod_all_rdeps(c, false); |
2989 | ||
17a367d8 CB |
2990 | p1 = do_lxcapi_get_config_path(c); |
2991 | /* strlen(p1) | |
2992 | * + | |
2993 | * / | |
2994 | * + | |
2995 | * strlen(c->name) | |
2996 | * + | |
2997 | * / | |
2998 | * + | |
2999 | * strlen("config") = 6 | |
3000 | * + | |
3001 | * \0 | |
3002 | */ | |
3003 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
3004 | path = malloc(len); | |
3005 | if (!path) { | |
3006 | ERROR("Failed to allocate memory"); | |
3007 | goto out; | |
3008 | } | |
3009 | ||
3010 | /* For an overlay container the rootfs is considered immutable and | |
3011 | * cannot be removed when restoring from a snapshot. | |
3012 | */ | |
3013 | if (storage && (!strcmp(storage->type, "overlay") || | |
3014 | !strcmp(storage->type, "overlayfs")) && | |
3015 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3016 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
3017 | if (ret < 0 || (size_t)ret >= len) | |
3018 | goto out; | |
3019 | ||
e0010464 | 3020 | if (am_guest_unpriv()) |
17a367d8 CB |
3021 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3022 | "lxc_unlink_exec_wrapper"); | |
3023 | else | |
3024 | ret = unlink(path); | |
3025 | if (ret < 0) { | |
3026 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3027 | path, c->name); | |
3028 | goto out; | |
3029 | } | |
3030 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3031 | ||
3032 | bret = true; | |
3033 | goto out; | |
3034 | } | |
3035 | ||
3036 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3037 | if (ret < 0 || (size_t)ret >= len) | |
3038 | goto out; | |
a73846d8 | 3039 | |
e0010464 | 3040 | if (am_guest_unpriv()) |
ee484f7f CB |
3041 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3042 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3043 | else |
18aa217b | 3044 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3045 | if (ret < 0) { |
17a367d8 CB |
3046 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3047 | c->name); | |
60bf62d4 SH |
3048 | goto out; |
3049 | } | |
17a367d8 | 3050 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3051 | |
6e54330c | 3052 | on_success: |
fef48dc9 | 3053 | bret = true; |
60bf62d4 SH |
3054 | |
3055 | out: | |
17a367d8 CB |
3056 | if (path) |
3057 | free(path); | |
a73846d8 | 3058 | |
3bc449ed | 3059 | container_disk_unlock(c); |
fef48dc9 | 3060 | return bret; |
72d0e1cb SG |
3061 | } |
3062 | ||
858377e4 | 3063 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3064 | { |
3065 | if (!c || !lxcapi_is_defined(c)) | |
3066 | return false; | |
2b2655a8 | 3067 | |
6e54330c CB |
3068 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3069 | if (has_snapshots(c)) { | |
3070 | ERROR("Container %s has snapshots; not removing", c->name); | |
3071 | return false; | |
3072 | } | |
18aa217b | 3073 | |
6e54330c CB |
3074 | if (has_fs_snapshots(c)) { |
3075 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3076 | return false; | |
3077 | } | |
18aa217b SH |
3078 | } |
3079 | ||
17a367d8 | 3080 | return container_destroy(c, NULL); |
18aa217b SH |
3081 | } |
3082 | ||
858377e4 | 3083 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3084 | |
858377e4 | 3085 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3086 | { |
3087 | if (!c || !lxcapi_is_defined(c)) | |
3088 | return false; | |
a73846d8 | 3089 | |
18aa217b SH |
3090 | if (!lxcapi_snapshot_destroy_all(c)) { |
3091 | ERROR("Error deleting all snapshots"); | |
3092 | return false; | |
3093 | } | |
a73846d8 | 3094 | |
18aa217b SH |
3095 | return lxcapi_destroy(c); |
3096 | } | |
3097 | ||
858377e4 SH |
3098 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3099 | ||
0d9cd9c3 CB |
3100 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3101 | const char *v) | |
96532523 | 3102 | { |
0d9cd9c3 | 3103 | int ret; |
96532523 | 3104 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3105 | bool bret = true; |
3106 | ||
3107 | config = lxc_get_config(key); | |
3108 | if (!config) | |
3109 | return -EINVAL; | |
3110 | ||
3111 | ret = config->set(key, v, conf, NULL); | |
3112 | if (ret < 0) | |
3113 | return -EINVAL; | |
3114 | ||
3115 | if (lxc_config_value_empty(v)) | |
3116 | do_clear_unexp_config_line(conf, key); | |
3117 | else | |
3118 | bret = do_append_unexp_config_line(conf, key, v); | |
3119 | if (!bret) | |
3120 | return -ENOMEM; | |
3121 | ||
3122 | return 0; | |
3123 | } | |
3124 | ||
3125 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3126 | const char *v) | |
3127 | { | |
3128 | int ret; | |
96532523 SH |
3129 | |
3130 | if (!c->lxc_conf) | |
3131 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3132 | |
6b0d5538 | 3133 | if (!c->lxc_conf) |
96532523 | 3134 | return false; |
4222a9f4 | 3135 | |
0d9cd9c3 CB |
3136 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3137 | if (ret < 0) | |
f979ac15 | 3138 | return false; |
4222a9f4 | 3139 | |
0d9cd9c3 | 3140 | return true; |
96532523 SH |
3141 | } |
3142 | ||
858377e4 | 3143 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3144 | { |
72d0e1cb | 3145 | bool b = false; |
72d0e1cb SG |
3146 | |
3147 | if (!c) | |
3148 | return false; | |
3149 | ||
5cee8c50 | 3150 | if (container_mem_lock(c)) |
72d0e1cb SG |
3151 | return false; |
3152 | ||
0d9cd9c3 | 3153 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3154 | |
5cee8c50 | 3155 | container_mem_unlock(c); |
72d0e1cb SG |
3156 | return b; |
3157 | } | |
3158 | ||
858377e4 SH |
3159 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3160 | ||
72d0e1cb SG |
3161 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3162 | { | |
3163 | if (!c || !c->configfile) | |
3164 | return NULL; | |
a73846d8 | 3165 | |
72d0e1cb SG |
3166 | return strdup(c->configfile); |
3167 | } | |
3168 | ||
2a59a681 SH |
3169 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3170 | { | |
3171 | if (!c || !c->config_path) | |
3172 | return NULL; | |
a73846d8 | 3173 | |
2a59a681 SH |
3174 | return (const char *)(c->config_path); |
3175 | } | |
3176 | ||
afeecbba SH |
3177 | /* |
3178 | * not for export | |
3179 | * Just recalculate the c->configfile based on the | |
3180 | * c->config_path, which must be set. | |
3181 | * The lxc_container must be locked or not yet public. | |
3182 | */ | |
3183 | static bool set_config_filename(struct lxc_container *c) | |
3184 | { | |
3185 | char *newpath; | |
3186 | int len, ret; | |
3187 | ||
3188 | if (!c->config_path) | |
3189 | return false; | |
3190 | ||
3191 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3192 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3193 | newpath = malloc(len); | |
3194 | if (!newpath) | |
3195 | return false; | |
3196 | ||
3197 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3198 | if (ret < 0 || ret >= len) { | |
3199 | fprintf(stderr, "Error printing out config file name\n"); | |
3200 | free(newpath); | |
3201 | return false; | |
3202 | } | |
3203 | ||
f10fad2f | 3204 | free(c->configfile); |
afeecbba SH |
3205 | c->configfile = newpath; |
3206 | ||
3207 | return true; | |
3208 | } | |
3209 | ||
858377e4 | 3210 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3211 | { |
3212 | char *p; | |
3213 | bool b = false; | |
afeecbba | 3214 | char *oldpath = NULL; |
2a59a681 SH |
3215 | |
3216 | if (!c) | |
3217 | return b; | |
3218 | ||
5cee8c50 | 3219 | if (container_mem_lock(c)) |
2a59a681 SH |
3220 | return b; |
3221 | ||
3222 | p = strdup(path); | |
afeecbba SH |
3223 | if (!p) { |
3224 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3225 | goto err; |
afeecbba SH |
3226 | } |
3227 | ||
2a59a681 SH |
3228 | b = true; |
3229 | if (c->config_path) | |
afeecbba | 3230 | oldpath = c->config_path; |
2a59a681 | 3231 | c->config_path = p; |
afeecbba SH |
3232 | |
3233 | /* Since we've changed the config path, we have to change the | |
3234 | * config file name too */ | |
3235 | if (!set_config_filename(c)) { | |
3236 | ERROR("Out of memory setting new config filename"); | |
3237 | b = false; | |
3238 | free(c->config_path); | |
3239 | c->config_path = oldpath; | |
3240 | oldpath = NULL; | |
3241 | } | |
a73846d8 | 3242 | |
2a59a681 | 3243 | err: |
f10fad2f | 3244 | free(oldpath); |
5cee8c50 | 3245 | container_mem_unlock(c); |
2a59a681 SH |
3246 | return b; |
3247 | } | |
3248 | ||
858377e4 | 3249 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3250 | |
858377e4 | 3251 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3252 | { |
3253 | int ret; | |
2202afc9 | 3254 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3255 | |
3256 | if (!c) | |
3257 | return false; | |
3258 | ||
3bc449ed | 3259 | if (is_stopped(c)) |
794dd120 SH |
3260 | return false; |
3261 | ||
2202afc9 CB |
3262 | cgroup_ops = cgroup_init(NULL); |
3263 | if (!cgroup_ops) | |
3264 | return false; | |
3265 | ||
3bc449ed SH |
3266 | if (container_disk_lock(c)) |
3267 | return false; | |
794dd120 | 3268 | |
2202afc9 | 3269 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed SH |
3270 | |
3271 | container_disk_unlock(c); | |
2202afc9 CB |
3272 | |
3273 | cgroup_exit(cgroup_ops); | |
3274 | ||
3bc449ed | 3275 | return ret == 0; |
794dd120 SH |
3276 | } |
3277 | ||
858377e4 SH |
3278 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3279 | ||
3280 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3281 | { |
3bc449ed | 3282 | int ret; |
2202afc9 | 3283 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3284 | |
6502006a | 3285 | if (!c) |
794dd120 SH |
3286 | return -1; |
3287 | ||
3bc449ed | 3288 | if (is_stopped(c)) |
794dd120 SH |
3289 | return -1; |
3290 | ||
2202afc9 CB |
3291 | cgroup_ops = cgroup_init(NULL); |
3292 | if (!cgroup_ops) | |
3293 | return -1; | |
3294 | ||
3bc449ed SH |
3295 | if (container_disk_lock(c)) |
3296 | return -1; | |
794dd120 | 3297 | |
2202afc9 CB |
3298 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3299 | c->config_path); | |
794dd120 | 3300 | |
3bc449ed | 3301 | container_disk_unlock(c); |
2202afc9 CB |
3302 | |
3303 | cgroup_exit(cgroup_ops); | |
3304 | ||
794dd120 SH |
3305 | return ret; |
3306 | } | |
3307 | ||
858377e4 SH |
3308 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3309 | ||
593e8478 | 3310 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3311 | { |
593e8478 | 3312 | return lxc_global_config_value(key); |
a8428dfa SH |
3313 | } |
3314 | ||
b6b918a1 SG |
3315 | const char *lxc_get_version(void) |
3316 | { | |
95ee490b | 3317 | return LXC_VERSION; |
b6b918a1 SG |
3318 | } |
3319 | ||
f0ca2726 | 3320 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3321 | { |
3322 | int in, out; | |
3323 | ssize_t len, ret; | |
3324 | char buf[8096]; | |
3325 | struct stat sbuf; | |
3326 | ||
3327 | if (file_exists(new)) { | |
3328 | ERROR("copy destination %s exists", new); | |
3329 | return -1; | |
3330 | } | |
a73846d8 | 3331 | |
9be53773 SH |
3332 | ret = stat(old, &sbuf); |
3333 | if (ret < 0) { | |
dfb31b25 | 3334 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3335 | return -1; |
3336 | } | |
3337 | ||
3338 | in = open(old, O_RDONLY); | |
3339 | if (in < 0) { | |
dfb31b25 | 3340 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3341 | return -1; |
3342 | } | |
a73846d8 | 3343 | |
9be53773 SH |
3344 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3345 | if (out < 0) { | |
dfb31b25 | 3346 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3347 | close(in); |
3348 | return -1; | |
3349 | } | |
3350 | ||
3351 | while (1) { | |
3e1e9db8 | 3352 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3353 | if (len < 0) { |
dfb31b25 | 3354 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3355 | goto err; |
3356 | } | |
a73846d8 | 3357 | |
9be53773 SH |
3358 | if (len == 0) |
3359 | break; | |
a73846d8 | 3360 | |
2a2a676d | 3361 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3362 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3363 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3364 | goto err; |
3365 | } | |
3366 | } | |
a73846d8 | 3367 | |
9be53773 SH |
3368 | close(in); |
3369 | close(out); | |
3370 | ||
1a0e70ac | 3371 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3372 | ret = chmod(new, sbuf.st_mode); |
3373 | if (ret) { | |
dfb31b25 | 3374 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3375 | return -1; |
3376 | } | |
3377 | ||
3378 | return 0; | |
3379 | ||
3380 | err: | |
3381 | close(in); | |
3382 | close(out); | |
3383 | return -1; | |
3384 | } | |
3385 | ||
9be53773 SH |
3386 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3387 | { | |
619256b5 | 3388 | int i, len, ret; |
9be53773 | 3389 | struct lxc_list *it; |
619256b5 ÇO |
3390 | char *cpath; |
3391 | ||
3392 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
3393 | cpath = alloca(len); | |
3394 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); | |
3395 | if (ret < 0 || ret >= len) | |
3396 | return -1; | |
9be53773 SH |
3397 | |
3398 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3399 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3400 | char *hookname = it->elem; | |
c32981c3 | 3401 | char *fname = strrchr(hookname, '/'); |
9be53773 | 3402 | char tmppath[MAXPATHLEN]; |
1a0e70ac | 3403 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3404 | return 0; |
a73846d8 | 3405 | |
619256b5 | 3406 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3407 | /* this hook is public - ignore */ |
619256b5 ÇO |
3408 | continue; |
3409 | } | |
a73846d8 | 3410 | |
1a0e70ac | 3411 | /* copy the script, and change the entry in confile */ |
9be53773 SH |
3412 | ret = snprintf(tmppath, MAXPATHLEN, "%s/%s/%s", |
3413 | c->config_path, c->name, fname+1); | |
3414 | if (ret < 0 || ret >= MAXPATHLEN) | |
3415 | return -1; | |
a73846d8 | 3416 | |
9be53773 SH |
3417 | ret = copy_file(it->elem, tmppath); |
3418 | if (ret < 0) | |
3419 | return -1; | |
a73846d8 | 3420 | |
9be53773 | 3421 | free(it->elem); |
a73846d8 | 3422 | |
9be53773 SH |
3423 | it->elem = strdup(tmppath); |
3424 | if (!it->elem) { | |
3425 | ERROR("out of memory copying hook path"); | |
3426 | return -1; | |
3427 | } | |
9be53773 SH |
3428 | } |
3429 | } | |
3430 | ||
67702c21 SH |
3431 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3432 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3433 | ERROR("Error saving new hooks in clone"); |
3434 | return -1; | |
3435 | } | |
a73846d8 | 3436 | |
858377e4 | 3437 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3438 | return 0; |
3439 | } | |
3440 | ||
9be53773 SH |
3441 | |
3442 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3443 | { | |
3444 | char newpath[MAXPATHLEN]; | |
3445 | char *oldpath = oldc->lxc_conf->fstab; | |
3446 | int ret; | |
3447 | ||
3448 | if (!oldpath) | |
3449 | return 0; | |
3450 | ||
47148e96 CB |
3451 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3452 | ||
c32981c3 | 3453 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3454 | if (!p) |
3455 | return -1; | |
a73846d8 | 3456 | |
9be53773 SH |
3457 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s%s", |
3458 | c->config_path, c->name, p); | |
3459 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3460 | ERROR("error printing new path for %s", oldpath); | |
3461 | return -1; | |
3462 | } | |
a73846d8 | 3463 | |
9be53773 SH |
3464 | if (file_exists(newpath)) { |
3465 | ERROR("error: fstab file %s exists", newpath); | |
3466 | return -1; | |
3467 | } | |
3468 | ||
3469 | if (copy_file(oldpath, newpath) < 0) { | |
3470 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3471 | return -1; | |
3472 | } | |
a73846d8 | 3473 | |
9be53773 | 3474 | free(c->lxc_conf->fstab); |
a73846d8 | 3475 | |
9be53773 SH |
3476 | c->lxc_conf->fstab = strdup(newpath); |
3477 | if (!c->lxc_conf->fstab) { | |
3478 | ERROR("error: allocating pathname"); | |
3479 | return -1; | |
3480 | } | |
a73846d8 | 3481 | |
47148e96 | 3482 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3483 | ERROR("error saving new lxctab"); |
3484 | return -1; | |
3485 | } | |
9be53773 SH |
3486 | |
3487 | return 0; | |
3488 | } | |
3489 | ||
dfb31b25 SH |
3490 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3491 | { | |
3492 | char path0[MAXPATHLEN], path1[MAXPATHLEN]; | |
3493 | int ret; | |
3494 | ||
3495 | ret = snprintf(path0, MAXPATHLEN, "%s/%s/lxc_rdepends", c0->config_path, | |
3496 | c0->name); | |
3497 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3498 | WARN("Error copying reverse dependencies"); | |
3499 | return; | |
3500 | } | |
a73846d8 | 3501 | |
dfb31b25 SH |
3502 | ret = snprintf(path1, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, |
3503 | c->name); | |
3504 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3505 | WARN("Error copying reverse dependencies"); | |
3506 | return; | |
3507 | } | |
a73846d8 | 3508 | |
dfb31b25 SH |
3509 | if (copy_file(path0, path1) < 0) { |
3510 | INFO("Error copying reverse dependencies"); | |
3511 | return; | |
3512 | } | |
3513 | } | |
3514 | ||
3515 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3516 | { | |
3517 | int ret; | |
3518 | char path[MAXPATHLEN]; | |
3519 | FILE *f; | |
3520 | bool bret; | |
3521 | ||
3522 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
3523 | c->name); | |
3524 | if (ret < 0 || ret >= MAXPATHLEN) | |
3525 | return false; | |
a73846d8 | 3526 | |
dfb31b25 SH |
3527 | f = fopen(path, "a"); |
3528 | if (!f) | |
3529 | return false; | |
a73846d8 | 3530 | |
dfb31b25 | 3531 | bret = true; |
a73846d8 | 3532 | |
1a0e70ac | 3533 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3534 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3535 | bret = false; | |
a73846d8 | 3536 | |
dfb31b25 SH |
3537 | if (fclose(f) != 0) |
3538 | bret = false; | |
a73846d8 | 3539 | |
dfb31b25 SH |
3540 | return bret; |
3541 | } | |
3542 | ||
15a90a10 SH |
3543 | /* |
3544 | * If the fs natively supports snapshot clones with no penalty, | |
3545 | * then default to those even if not requested. | |
3546 | * Currently we only do this for btrfs. | |
3547 | */ | |
3548 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3549 | struct lxc_container *c1) | |
3550 | { | |
2afdc31f | 3551 | int ret; |
15a90a10 SH |
3552 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3553 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
3554 | char *p0 = alloca(l0 + 1); | |
3555 | char *p1 = alloca(l1 + 1); | |
6e0fa6a0 | 3556 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3557 | |
2afdc31f CB |
3558 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3559 | if (ret < 0 || ret >= l0) | |
3560 | return false; | |
3561 | ||
3562 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3563 | if (ret < 0 || ret >= l1) | |
3564 | return false; | |
9a09badc CB |
3565 | |
3566 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3567 | return false; | |
3568 | ||
6e0fa6a0 CB |
3569 | if (is_btrfs_subvol(rootfs) <= 0) |
3570 | return false; | |
3571 | ||
15a90a10 SH |
3572 | return btrfs_same_fs(p0, p1) == 0; |
3573 | } | |
3574 | ||
9be53773 | 3575 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3576 | const char *newtype, int flags, const char *bdevdata, |
3577 | uint64_t newsize) | |
9be53773 | 3578 | { |
10bc1861 | 3579 | struct lxc_storage *bdev; |
07db51a2 | 3580 | bool need_rdep; |
9be53773 | 3581 | |
15a90a10 SH |
3582 | if (should_default_to_snapshot(c0, c)) |
3583 | flags |= LXC_CLONE_SNAPSHOT; | |
3584 | ||
10bc1861 CB |
3585 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3586 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3587 | if (!bdev) { |
763429b6 | 3588 | ERROR("Error copying storage."); |
9be53773 SH |
3589 | return -1; |
3590 | } | |
763429b6 CB |
3591 | |
3592 | /* Set new rootfs. */ | |
9be53773 SH |
3593 | free(c->lxc_conf->rootfs.path); |
3594 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3595 | storage_put(bdev); |
763429b6 | 3596 | |
dfb31b25 | 3597 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3598 | ERROR("Out of memory while setting storage path."); |
3599 | return -1; | |
3600 | } | |
763429b6 | 3601 | |
7a96a068 CB |
3602 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3603 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3604 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3605 | c->lxc_conf->rootfs.path)) { |
3606 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3607 | return -1; |
3608 | } | |
763429b6 | 3609 | |
eee59f94 SH |
3610 | if (flags & LXC_CLONE_SNAPSHOT) |
3611 | copy_rdepends(c, c0); | |
a73846d8 | 3612 | |
dfb31b25 SH |
3613 | if (need_rdep) { |
3614 | if (!add_rdepends(c, c0)) | |
3615 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3616 | c->name, c0->name); |
dfb31b25 SH |
3617 | } |
3618 | ||
3619 | mod_all_rdeps(c, true); | |
3620 | ||
9be53773 SH |
3621 | return 0; |
3622 | } | |
3623 | ||
1354955b SH |
3624 | struct clone_update_data { |
3625 | struct lxc_container *c0; | |
3626 | struct lxc_container *c1; | |
3627 | int flags; | |
3628 | char **hookargs; | |
3629 | }; | |
3630 | ||
3631 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3632 | { |
1354955b SH |
3633 | struct lxc_container *c0 = data->c0; |
3634 | struct lxc_container *c = data->c1; | |
3635 | int flags = data->flags; | |
3636 | char **hookargs = data->hookargs; | |
9be53773 SH |
3637 | int ret = -1; |
3638 | char path[MAXPATHLEN]; | |
10bc1861 | 3639 | struct lxc_storage *bdev; |
9be53773 | 3640 | FILE *fout; |
148e91f5 | 3641 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3642 | |
3643 | /* update hostname in rootfs */ | |
3644 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3645 | ||
1354955b SH |
3646 | if (setgid(0) < 0) { |
3647 | ERROR("Failed to setgid to 0"); | |
3648 | return -1; | |
3649 | } | |
a73846d8 | 3650 | |
1354955b SH |
3651 | if (setuid(0) < 0) { |
3652 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3653 | return -1; |
1354955b | 3654 | } |
a73846d8 | 3655 | |
c476bdce SH |
3656 | if (setgroups(0, NULL) < 0) |
3657 | WARN("Failed to clear groups"); | |
9be53773 | 3658 | |
1354955b SH |
3659 | if (unshare(CLONE_NEWNS) < 0) |
3660 | return -1; | |
a73846d8 | 3661 | |
8a388ed4 | 3662 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3663 | if (!bdev) |
1354955b | 3664 | return -1; |
a73846d8 | 3665 | |
cf3ef16d SH |
3666 | if (strcmp(bdev->type, "dir") != 0) { |
3667 | if (unshare(CLONE_NEWNS) < 0) { | |
3668 | ERROR("error unsharing mounts"); | |
10bc1861 | 3669 | storage_put(bdev); |
1354955b | 3670 | return -1; |
cf3ef16d | 3671 | } |
a73846d8 | 3672 | |
2c6f3fc9 SH |
3673 | if (detect_shared_rootfs()) { |
3674 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3675 | SYSERROR("Failed to make / rslave"); | |
3676 | ERROR("Continuing..."); | |
3677 | } | |
3678 | } | |
a73846d8 | 3679 | |
e7de366c | 3680 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3681 | storage_put(bdev); |
1354955b | 3682 | return -1; |
e7de366c | 3683 | } |
1a0e70ac | 3684 | } else { /* TODO come up with a better way */ |
f10fad2f | 3685 | free(bdev->dest); |
cf3ef16d SH |
3686 | bdev->dest = strdup(bdev->src); |
3687 | } | |
148e91f5 SH |
3688 | |
3689 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3690 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3691 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3692 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3693 | |
3694 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3695 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3696 | |
3697 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3698 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3699 | |
3700 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3701 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3702 | |
3703 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3704 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3705 | |
14a7b0f9 | 3706 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3707 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3708 | storage_put(bdev); |
1354955b | 3709 | return -1; |
148e91f5 SH |
3710 | } |
3711 | } | |
3712 | ||
3713 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
3714 | ret = snprintf(path, MAXPATHLEN, "%s/etc/hostname", bdev->dest); | |
10bc1861 | 3715 | storage_put(bdev); |
e7de366c | 3716 | |
148e91f5 | 3717 | if (ret < 0 || ret >= MAXPATHLEN) |
1354955b | 3718 | return -1; |
a73846d8 | 3719 | |
8058be39 | 3720 | if (!file_exists(path)) |
1354955b | 3721 | return 0; |
a73846d8 | 3722 | |
148e91f5 | 3723 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3724 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3725 | return 0; |
148e91f5 | 3726 | } |
a73846d8 | 3727 | |
a684f0b7 ÇO |
3728 | if (fprintf(fout, "%s", c->name) < 0) { |
3729 | fclose(fout); | |
1354955b | 3730 | return -1; |
6849cb5b | 3731 | } |
a73846d8 | 3732 | |
148e91f5 | 3733 | if (fclose(fout) < 0) |
1354955b | 3734 | return -1; |
10bc1861 CB |
3735 | } else { |
3736 | storage_put(bdev); | |
9be53773 | 3737 | } |
e7de366c | 3738 | |
1354955b SH |
3739 | return 0; |
3740 | } | |
3741 | ||
3742 | static int clone_update_rootfs_wrapper(void *data) | |
3743 | { | |
3744 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3745 | return clone_update_rootfs(arg); | |
9be53773 SH |
3746 | } |
3747 | ||
3748 | /* | |
3749 | * We want to support: | |
3750 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3751 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3752 | ||
ba115175 CB |
3753 | -s [ implies overlay] |
3754 | -s -B overlay | |
9be53773 SH |
3755 | |
3756 | only rootfs gets converted (copied/snapshotted) on clone. | |
3757 | */ | |
3758 | ||
d5752559 | 3759 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3760 | { |
c32981c3 | 3761 | char *p = strrchr(path, '/'); |
d5752559 | 3762 | int ret = -1; |
9be53773 SH |
3763 | |
3764 | if (!p) | |
3765 | return -1; | |
a73846d8 | 3766 | |
9be53773 | 3767 | *p = '\0'; |
d028235d | 3768 | ret = do_create_container_dir(path, conf); |
9be53773 | 3769 | *p = '/'; |
a73846d8 | 3770 | |
9be53773 SH |
3771 | return ret; |
3772 | } | |
3773 | ||
858377e4 | 3774 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3775 | const char *lxcpath, int flags, |
d659597e | 3776 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3777 | char **hookargs) |
9be53773 | 3778 | { |
9be53773 | 3779 | char newpath[MAXPATHLEN]; |
0e1a60b0 | 3780 | int fd, ret; |
1354955b | 3781 | struct clone_update_data data; |
3b392519 | 3782 | size_t saved_unexp_len; |
1354955b | 3783 | pid_t pid; |
17a367d8 CB |
3784 | int storage_copied = 0; |
3785 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3786 | struct lxc_container *c2 = NULL; | |
9be53773 | 3787 | |
858377e4 | 3788 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3789 | return NULL; |
3790 | ||
5cee8c50 | 3791 | if (container_mem_lock(c)) |
9be53773 SH |
3792 | return NULL; |
3793 | ||
39dc698c | 3794 | if (!is_stopped(c)) { |
9be53773 SH |
3795 | ERROR("error: Original container (%s) is running", c->name); |
3796 | goto out; | |
3797 | } | |
3798 | ||
1a0e70ac | 3799 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3800 | if (!newname) |
3801 | newname = c->name; | |
a73846d8 | 3802 | |
05d53f4c | 3803 | if (!lxcpath) |
858377e4 | 3804 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3805 | |
05d53f4c | 3806 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/config", lxcpath, newname); |
6849cb5b | 3807 | if (ret < 0 || ret >= MAXPATHLEN) { |
9be53773 SH |
3808 | SYSERROR("clone: failed making config pathname"); |
3809 | goto out; | |
3810 | } | |
17a367d8 | 3811 | |
9be53773 SH |
3812 | if (file_exists(newpath)) { |
3813 | ERROR("error: clone: %s exists", newpath); | |
3814 | goto out; | |
3815 | } | |
3816 | ||
d5752559 | 3817 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3818 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3819 | ERROR("Error creating container dir for %s", newpath); |
3820 | goto out; | |
3821 | } | |
3822 | ||
1a0e70ac | 3823 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3824 | if (c->lxc_conf->rootfs.path) { |
3825 | origroot = c->lxc_conf->rootfs.path; | |
3826 | c->lxc_conf->rootfs.path = NULL; | |
3827 | } | |
0e1a60b0 CB |
3828 | |
3829 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
3830 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
3831 | if (fd < 0) { | |
3832 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3833 | goto out; |
3834 | } | |
5eea90e8 SH |
3835 | |
3836 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3837 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3838 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3839 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3840 | close(fd); |
5eea90e8 SH |
3841 | goto out; |
3842 | } | |
7a96a068 | 3843 | |
7a96a068 | 3844 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3845 | write_config(fd, c->lxc_conf); |
3846 | close(fd); | |
a73846d8 | 3847 | |
8d2efe40 | 3848 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3849 | |
5eea90e8 SH |
3850 | free(c->lxc_conf->unexpanded_config); |
3851 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3852 | saved_unexp_conf = NULL; | |
3b392519 | 3853 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3854 | |
90b366fc CB |
3855 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/rootfs", lxcpath, newname); |
3856 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3857 | SYSERROR("clone: failed making rootfs pathname"); | |
3858 | goto out; | |
3859 | } | |
17a367d8 CB |
3860 | |
3861 | ret = mkdir(newpath, 0755); | |
3862 | if (ret < 0) { | |
3863 | /* For an overlay container the rootfs is considered immutable | |
3864 | * and will not have been removed when restoring from a | |
3865 | * snapshot. | |
3866 | */ | |
3867 | if (errno != ENOENT && | |
3868 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3869 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3870 | goto out; | |
3871 | } | |
9be53773 SH |
3872 | } |
3873 | ||
e0010464 | 3874 | if (am_guest_unpriv()) { |
1354955b | 3875 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3876 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3877 | goto out; |
3878 | } | |
3879 | } | |
3880 | ||
05d53f4c | 3881 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3882 | if (!c2) { |
05d53f4c SH |
3883 | ERROR("clone: failed to create new container (%s %s)", newname, |
3884 | lxcpath); | |
9be53773 SH |
3885 | goto out; |
3886 | } | |
8d2efe40 | 3887 | |
1a0e70ac | 3888 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3889 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3890 | if (ret < 0) | |
3891 | goto out; | |
9be53773 | 3892 | |
1a0e70ac | 3893 | /* update utsname */ |
3d7ad474 CB |
3894 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3895 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3896 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3897 | |
0d9cd9c3 | 3898 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3899 | ERROR("Error setting new hostname"); |
3900 | goto out; | |
3901 | } | |
96532523 SH |
3902 | } |
3903 | ||
1a0e70ac | 3904 | /* copy hooks */ |
619256b5 ÇO |
3905 | ret = copyhooks(c, c2); |
3906 | if (ret < 0) { | |
3907 | ERROR("error copying hooks"); | |
3908 | goto out; | |
9be53773 SH |
3909 | } |
3910 | ||
3911 | if (copy_fstab(c, c2) < 0) { | |
3912 | ERROR("error copying fstab"); | |
9be53773 SH |
3913 | goto out; |
3914 | } | |
3915 | ||
1a0e70ac | 3916 | /* update macaddrs */ |
6b0d5538 | 3917 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3918 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3919 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3920 | goto out; |
3921 | } | |
3922 | } | |
9be53773 | 3923 | |
1a0e70ac | 3924 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3925 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3926 | goto out; |
3927 | ||
1a0e70ac CB |
3928 | /* We've now successfully created c2's storage, so clear it out if we |
3929 | * fail after this. | |
3930 | */ | |
176d9acb SH |
3931 | storage_copied = 1; |
3932 | ||
375c2258 | 3933 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3934 | goto out; |
9be53773 | 3935 | |
1354955b SH |
3936 | if ((pid = fork()) < 0) { |
3937 | SYSERROR("fork"); | |
9be53773 | 3938 | goto out; |
1354955b | 3939 | } |
a73846d8 | 3940 | |
1354955b SH |
3941 | if (pid > 0) { |
3942 | ret = wait_for_pid(pid); | |
3943 | if (ret) | |
3944 | goto out; | |
a73846d8 | 3945 | |
1354955b SH |
3946 | container_mem_unlock(c); |
3947 | return c2; | |
3948 | } | |
a73846d8 | 3949 | |
1354955b SH |
3950 | data.c0 = c; |
3951 | data.c1 = c2; | |
3952 | data.flags = flags; | |
3953 | data.hookargs = hookargs; | |
a73846d8 | 3954 | |
e0010464 | 3955 | if (am_guest_unpriv()) |
ee484f7f CB |
3956 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3957 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3958 | else |
3959 | ret = clone_update_rootfs(&data); | |
3960 | if (ret < 0) | |
d8480a31 | 3961 | _exit(EXIT_FAILURE); |
9be53773 | 3962 | |
5cee8c50 | 3963 | container_mem_unlock(c); |
d8480a31 | 3964 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3965 | |
3966 | out: | |
5cee8c50 | 3967 | container_mem_unlock(c); |
375c2258 | 3968 | if (c2) { |
176d9acb SH |
3969 | if (!storage_copied) |
3970 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 3971 | |
375c2258 | 3972 | c2->destroy(c2); |
9be53773 | 3973 | lxc_container_put(c2); |
375c2258 | 3974 | } |
9be53773 SH |
3975 | |
3976 | return NULL; | |
3977 | } | |
3978 | ||
858377e4 SH |
3979 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3980 | const char *lxcpath, int flags, | |
3981 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3982 | char **hookargs) | |
3983 | { | |
3984 | struct lxc_container * ret; | |
a73846d8 | 3985 | |
858377e4 SH |
3986 | current_config = c ? c->lxc_conf : NULL; |
3987 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
3988 | current_config = NULL; | |
a73846d8 | 3989 | |
858377e4 SH |
3990 | return ret; |
3991 | } | |
3992 | ||
3993 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 3994 | { |
10bc1861 | 3995 | struct lxc_storage *bdev; |
06e5650e | 3996 | struct lxc_container *newc; |
06e5650e | 3997 | |
d693cf93 | 3998 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
3999 | return false; |
4000 | ||
18aa217b SH |
4001 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4002 | ERROR("Renaming a container with snapshots is not supported"); | |
4003 | return false; | |
4004 | } | |
a73846d8 | 4005 | |
8a388ed4 | 4006 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4007 | if (!bdev) { |
4008 | ERROR("Failed to find original backing store type"); | |
4009 | return false; | |
4010 | } | |
4011 | ||
619256b5 | 4012 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4013 | storage_put(bdev); |
06e5650e ÇO |
4014 | if (!newc) { |
4015 | lxc_container_put(newc); | |
4016 | return false; | |
4017 | } | |
4018 | ||
4019 | if (newc && lxcapi_is_defined(newc)) | |
4020 | lxc_container_put(newc); | |
4021 | ||
17a367d8 | 4022 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4023 | ERROR("Could not destroy existing container %s", c->name); |
4024 | return false; | |
4025 | } | |
a73846d8 | 4026 | |
06e5650e ÇO |
4027 | return true; |
4028 | } | |
4029 | ||
858377e4 SH |
4030 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4031 | ||
a0e93eeb CS |
4032 | 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) |
4033 | { | |
858377e4 SH |
4034 | int ret; |
4035 | ||
a0e93eeb CS |
4036 | if (!c) |
4037 | return -1; | |
4038 | ||
858377e4 SH |
4039 | current_config = c->lxc_conf; |
4040 | ||
4041 | ret = lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
4042 | current_config = NULL; | |
4043 | return ret; | |
a0e93eeb CS |
4044 | } |
4045 | ||
858377e4 | 4046 | 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 |
4047 | { |
4048 | lxc_attach_command_t command; | |
4049 | pid_t pid; | |
4050 | int r; | |
4051 | ||
4052 | if (!c) | |
4053 | return -1; | |
4054 | ||
4055 | command.program = (char*)program; | |
4056 | command.argv = (char**)argv; | |
a73846d8 | 4057 | |
a0e93eeb CS |
4058 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); |
4059 | if (r < 0) { | |
4060 | ERROR("ups"); | |
4061 | return r; | |
4062 | } | |
a73846d8 | 4063 | |
a0e93eeb CS |
4064 | return lxc_wait_for_pid_status(pid); |
4065 | } | |
4066 | ||
858377e4 SH |
4067 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
4068 | { | |
4069 | int ret; | |
a73846d8 | 4070 | |
858377e4 SH |
4071 | current_config = c ? c->lxc_conf : NULL; |
4072 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4073 | current_config = NULL; | |
a73846d8 | 4074 | |
858377e4 SH |
4075 | return ret; |
4076 | } | |
4077 | ||
74a3920a | 4078 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 SH |
4079 | { |
4080 | char *fname; | |
4081 | struct stat sb; | |
4082 | int i = 0, ret; | |
4083 | ||
4084 | fname = alloca(strlen(lxcpath) + 20); | |
a73846d8 | 4085 | |
f5dd1d53 SH |
4086 | while (1) { |
4087 | sprintf(fname, "%s/snap%d", lxcpath, i); | |
a73846d8 | 4088 | |
f5dd1d53 SH |
4089 | ret = stat(fname, &sb); |
4090 | if (ret != 0) | |
4091 | return i; | |
a73846d8 | 4092 | |
f5dd1d53 SH |
4093 | i++; |
4094 | } | |
4095 | } | |
4096 | ||
18aa217b SH |
4097 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4098 | { | |
4099 | int ret; | |
a73846d8 | 4100 | |
18aa217b SH |
4101 | /* |
4102 | * If the old style snapshot path exists, use it | |
4103 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4104 | */ | |
4105 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps", c->config_path); | |
4106 | if (ret < 0 || ret >= MAXPATHLEN) | |
4107 | return false; | |
a73846d8 | 4108 | |
18aa217b SH |
4109 | if (dir_exists(snappath)) { |
4110 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps/%s", c->config_path, c->name); | |
4111 | if (ret < 0 || ret >= MAXPATHLEN) | |
4112 | return false; | |
a73846d8 | 4113 | |
18aa217b SH |
4114 | return true; |
4115 | } | |
4116 | ||
4117 | /* | |
4118 | * Use the new style path | |
4119 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4120 | */ | |
4121 | ret = snprintf(snappath, MAXPATHLEN, "%s/%s/snaps", c->config_path, c->name); | |
4122 | if (ret < 0 || ret >= MAXPATHLEN) | |
4123 | return false; | |
a73846d8 | 4124 | |
18aa217b SH |
4125 | return true; |
4126 | } | |
4127 | ||
858377e4 | 4128 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 SH |
4129 | { |
4130 | int i, flags, ret; | |
4131 | struct lxc_container *c2; | |
4132 | char snappath[MAXPATHLEN], newname[20]; | |
4133 | ||
840f05df SH |
4134 | if (!c || !lxcapi_is_defined(c)) |
4135 | return -1; | |
4136 | ||
10bc1861 | 4137 | if (!storage_can_backup(c->lxc_conf)) { |
cdd01be2 SH |
4138 | ERROR("%s's backing store cannot be backed up.", c->name); |
4139 | ERROR("Your container must use another backing store type."); | |
4140 | return -1; | |
4141 | } | |
4142 | ||
18aa217b | 4143 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4144 | return -1; |
18aa217b | 4145 | |
f5dd1d53 SH |
4146 | i = get_next_index(snappath, c->name); |
4147 | ||
4148 | if (mkdir_p(snappath, 0755) < 0) { | |
4149 | ERROR("Failed to create snapshot directory %s", snappath); | |
4150 | return -1; | |
4151 | } | |
4152 | ||
4153 | ret = snprintf(newname, 20, "snap%d", i); | |
4154 | if (ret < 0 || ret >= 20) | |
4155 | return -1; | |
4156 | ||
0a83cbbb SH |
4157 | /* |
4158 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4159 | * created in the original container | |
4160 | */ | |
4161 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4162 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4163 | if (storage_is_dir(c->lxc_conf)) { |
8c39f7a4 SH |
4164 | ERROR("Snapshot of directory-backed container requested."); |
4165 | ERROR("Making a copy-clone. If you do want snapshots, then"); | |
12e6ab5d | 4166 | ERROR("please create overlay clone first, snapshot that"); |
8c39f7a4 SH |
4167 | ERROR("and keep the original container pristine."); |
4168 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
4169 | } | |
a73846d8 | 4170 | |
858377e4 | 4171 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4172 | if (!c2) { |
959aee9c | 4173 | ERROR("clone of %s:%s failed", c->config_path, c->name); |
f5dd1d53 SH |
4174 | return -1; |
4175 | } | |
4176 | ||
4177 | lxc_container_put(c2); | |
4178 | ||
1a0e70ac | 4179 | /* Now write down the creation time. */ |
f5dd1d53 SH |
4180 | time_t timer; |
4181 | char buffer[25]; | |
4182 | struct tm* tm_info; | |
025ed0f3 | 4183 | FILE *f; |
f5dd1d53 SH |
4184 | |
4185 | time(&timer); | |
4186 | tm_info = localtime(&timer); | |
4187 | ||
4188 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", tm_info); | |
4189 | ||
4190 | char *dfnam = alloca(strlen(snappath) + strlen(newname) + 5); | |
4191 | sprintf(dfnam, "%s/%s/ts", snappath, newname); | |
025ed0f3 | 4192 | f = fopen(dfnam, "w"); |
f5dd1d53 | 4193 | if (!f) { |
959aee9c | 4194 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4195 | return -1; |
4196 | } | |
a73846d8 | 4197 | |
f5dd1d53 SH |
4198 | if (fprintf(f, "%s", buffer) < 0) { |
4199 | SYSERROR("Writing timestamp"); | |
4200 | fclose(f); | |
4201 | return -1; | |
4202 | } | |
a73846d8 | 4203 | |
025ed0f3 | 4204 | ret = fclose(f); |
025ed0f3 | 4205 | if (ret != 0) { |
f5dd1d53 SH |
4206 | SYSERROR("Writing timestamp"); |
4207 | return -1; | |
4208 | } | |
4209 | ||
4210 | if (commentfile) { | |
1a0e70ac | 4211 | /* $p / $name / comment \0 */ |
f5dd1d53 SH |
4212 | int len = strlen(snappath) + strlen(newname) + 10; |
4213 | char *path = alloca(len); | |
a73846d8 | 4214 | |
f5dd1d53 SH |
4215 | sprintf(path, "%s/%s/comment", snappath, newname); |
4216 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4217 | } | |
4218 | ||
4219 | return i; | |
4220 | } | |
4221 | ||
858377e4 SH |
4222 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4223 | ||
f5dd1d53 SH |
4224 | static void lxcsnap_free(struct lxc_snapshot *s) |
4225 | { | |
f10fad2f ME |
4226 | free(s->name); |
4227 | free(s->comment_pathname); | |
4228 | free(s->timestamp); | |
4229 | free(s->lxcpath); | |
f5dd1d53 SH |
4230 | } |
4231 | ||
4232 | static char *get_snapcomment_path(char* snappath, char *name) | |
4233 | { | |
1a0e70ac | 4234 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4235 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4236 | char *s = malloc(len); | |
4237 | ||
4238 | if (s) { | |
4239 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4240 | if (ret < 0 || ret >= len) { | |
4241 | free(s); | |
4242 | s = NULL; | |
4243 | } | |
4244 | } | |
a73846d8 | 4245 | |
f5dd1d53 SH |
4246 | return s; |
4247 | } | |
4248 | ||
4249 | static char *get_timestamp(char* snappath, char *name) | |
4250 | { | |
4251 | char path[MAXPATHLEN], *s = NULL; | |
4252 | int ret, len; | |
4253 | FILE *fin; | |
4254 | ||
4255 | ret = snprintf(path, MAXPATHLEN, "%s/%s/ts", snappath, name); | |
4256 | if (ret < 0 || ret >= MAXPATHLEN) | |
4257 | return NULL; | |
a73846d8 | 4258 | |
025ed0f3 | 4259 | fin = fopen(path, "r"); |
025ed0f3 | 4260 | if (!fin) |
f5dd1d53 | 4261 | return NULL; |
a73846d8 | 4262 | |
f5dd1d53 SH |
4263 | (void) fseek(fin, 0, SEEK_END); |
4264 | len = ftell(fin); | |
4265 | (void) fseek(fin, 0, SEEK_SET); | |
4266 | if (len > 0) { | |
4267 | s = malloc(len+1); | |
4268 | if (s) { | |
4269 | s[len] = '\0'; | |
4270 | if (fread(s, 1, len, fin) != len) { | |
4271 | SYSERROR("reading timestamp"); | |
4272 | free(s); | |
4273 | s = NULL; | |
4274 | } | |
4275 | } | |
4276 | } | |
a73846d8 | 4277 | |
f5dd1d53 SH |
4278 | fclose(fin); |
4279 | return s; | |
4280 | } | |
4281 | ||
858377e4 | 4282 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 SH |
4283 | { |
4284 | char snappath[MAXPATHLEN], path2[MAXPATHLEN]; | |
18aa217b | 4285 | int count = 0, ret; |
74f96976 | 4286 | struct dirent *direntp; |
f5dd1d53 SH |
4287 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4288 | DIR *dir; | |
4289 | ||
4290 | if (!c || !lxcapi_is_defined(c)) | |
4291 | return -1; | |
c868b261 | 4292 | |
18aa217b | 4293 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4294 | ERROR("path name too long"); |
4295 | return -1; | |
4296 | } | |
a73846d8 | 4297 | |
025ed0f3 | 4298 | dir = opendir(snappath); |
025ed0f3 | 4299 | if (!dir) { |
a73846d8 | 4300 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4301 | return 0; |
4302 | } | |
4303 | ||
74f96976 | 4304 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4305 | if (!strcmp(direntp->d_name, ".")) |
4306 | continue; | |
4307 | ||
4308 | if (!strcmp(direntp->d_name, "..")) | |
4309 | continue; | |
4310 | ||
4311 | ret = snprintf(path2, MAXPATHLEN, "%s/%s/config", snappath, direntp->d_name); | |
4312 | if (ret < 0 || ret >= MAXPATHLEN) { | |
4313 | ERROR("pathname too long"); | |
4314 | goto out_free; | |
4315 | } | |
a73846d8 | 4316 | |
f5dd1d53 SH |
4317 | if (!file_exists(path2)) |
4318 | continue; | |
a73846d8 | 4319 | |
f5dd1d53 SH |
4320 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4321 | if (!nsnaps) { | |
4322 | SYSERROR("Out of memory"); | |
4323 | goto out_free; | |
4324 | } | |
a73846d8 | 4325 | |
f5dd1d53 SH |
4326 | snaps = nsnaps; |
4327 | snaps[count].free = lxcsnap_free; | |
4328 | snaps[count].name = strdup(direntp->d_name); | |
4329 | if (!snaps[count].name) | |
4330 | goto out_free; | |
a73846d8 | 4331 | |
f5dd1d53 SH |
4332 | snaps[count].lxcpath = strdup(snappath); |
4333 | if (!snaps[count].lxcpath) { | |
4334 | free(snaps[count].name); | |
4335 | goto out_free; | |
4336 | } | |
a73846d8 | 4337 | |
f5dd1d53 SH |
4338 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4339 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4340 | count++; | |
4341 | } | |
4342 | ||
4343 | if (closedir(dir)) | |
a73846d8 | 4344 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4345 | |
4346 | *ret_snaps = snaps; | |
4347 | return count; | |
4348 | ||
4349 | out_free: | |
4350 | if (snaps) { | |
4351 | int i; | |
a73846d8 | 4352 | |
f5dd1d53 SH |
4353 | for (i=0; i<count; i++) |
4354 | lxcsnap_free(&snaps[i]); | |
a73846d8 | 4355 | |
f5dd1d53 SH |
4356 | free(snaps); |
4357 | } | |
a73846d8 | 4358 | |
9baa57bd | 4359 | if (closedir(dir)) |
a73846d8 | 4360 | WARN("Failed to close directory"); |
4361 | ||
f5dd1d53 SH |
4362 | return -1; |
4363 | } | |
4364 | ||
858377e4 SH |
4365 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4366 | ||
4367 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 SH |
4368 | { |
4369 | char clonelxcpath[MAXPATHLEN]; | |
18aa217b | 4370 | int flags = 0; |
f5dd1d53 | 4371 | struct lxc_container *snap, *rest; |
10bc1861 | 4372 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4373 | bool b = false; |
4374 | ||
4375 | if (!c || !c->name || !c->config_path) | |
4376 | return false; | |
4377 | ||
18aa217b SH |
4378 | if (has_fs_snapshots(c)) { |
4379 | ERROR("container rootfs has dependent snapshots"); | |
4380 | return false; | |
4381 | } | |
4382 | ||
8a388ed4 | 4383 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4384 | if (!bdev) { |
4385 | ERROR("Failed to find original backing store type"); | |
4386 | return false; | |
4387 | } | |
4388 | ||
17a367d8 CB |
4389 | /* For an overlay container the rootfs is considered immutable |
4390 | * and cannot be removed when restoring from a snapshot. We pass this | |
4391 | * internal flag along to communicate this to various parts of the | |
4392 | * codebase. | |
4393 | */ | |
4394 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4395 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4396 | ||
f5dd1d53 SH |
4397 | if (!newname) |
4398 | newname = c->name; | |
7e36f87e | 4399 | |
18aa217b | 4400 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4401 | storage_put(bdev); |
f5dd1d53 SH |
4402 | return false; |
4403 | } | |
1a0e70ac | 4404 | /* how should we lock this? */ |
f5dd1d53 SH |
4405 | |
4406 | snap = lxc_container_new(snapname, clonelxcpath); | |
4407 | if (!snap || !lxcapi_is_defined(snap)) { | |
4408 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4409 | |
17a367d8 CB |
4410 | if (snap) |
4411 | lxc_container_put(snap); | |
a73846d8 | 4412 | |
10bc1861 | 4413 | storage_put(bdev); |
f5dd1d53 SH |
4414 | return false; |
4415 | } | |
4416 | ||
17a367d8 CB |
4417 | if (!strcmp(c->name, newname)) { |
4418 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4419 | ERROR("Could not destroy existing container %s", newname); |
4420 | lxc_container_put(snap); | |
10bc1861 | 4421 | storage_put(bdev); |
7e36f87e ÇO |
4422 | return false; |
4423 | } | |
4424 | } | |
4425 | ||
de269ee8 SH |
4426 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4427 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4428 | |
4429 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4430 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4431 | |
09f6f8c4 CB |
4432 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4433 | NULL, 0, NULL); | |
10bc1861 | 4434 | storage_put(bdev); |
f5dd1d53 SH |
4435 | if (rest && lxcapi_is_defined(rest)) |
4436 | b = true; | |
a73846d8 | 4437 | |
f5dd1d53 SH |
4438 | if (rest) |
4439 | lxc_container_put(rest); | |
17a367d8 | 4440 | |
f5dd1d53 SH |
4441 | lxc_container_put(snap); |
4442 | return b; | |
4443 | } | |
4444 | ||
858377e4 SH |
4445 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4446 | ||
18aa217b | 4447 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4448 | { |
771d96b3 | 4449 | struct lxc_container *snap = NULL; |
18aa217b | 4450 | bool bret = false; |
771d96b3 ÇO |
4451 | |
4452 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4453 | if (!snap) { |
771d96b3 ÇO |
4454 | ERROR("Could not find snapshot %s", snapname); |
4455 | goto err; | |
4456 | } | |
4457 | ||
858377e4 | 4458 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4459 | ERROR("Could not destroy snapshot %s", snapname); |
4460 | goto err; | |
4461 | } | |
a73846d8 | 4462 | |
18aa217b | 4463 | bret = true; |
771d96b3 | 4464 | |
771d96b3 ÇO |
4465 | err: |
4466 | if (snap) | |
4467 | lxc_container_put(snap); | |
a73846d8 | 4468 | |
18aa217b SH |
4469 | return bret; |
4470 | } | |
4471 | ||
4472 | static bool remove_all_snapshots(const char *path) | |
4473 | { | |
4474 | DIR *dir; | |
74f96976 | 4475 | struct dirent *direntp; |
18aa217b SH |
4476 | bool bret = true; |
4477 | ||
4478 | dir = opendir(path); | |
4479 | if (!dir) { | |
4480 | SYSERROR("opendir on snapshot path %s", path); | |
4481 | return false; | |
4482 | } | |
a73846d8 | 4483 | |
74f96976 | 4484 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4485 | if (!strcmp(direntp->d_name, ".")) |
4486 | continue; | |
a73846d8 | 4487 | |
18aa217b SH |
4488 | if (!strcmp(direntp->d_name, "..")) |
4489 | continue; | |
a73846d8 | 4490 | |
18aa217b SH |
4491 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4492 | bret = false; | |
4493 | continue; | |
4494 | } | |
4495 | } | |
4496 | ||
4497 | closedir(dir); | |
4498 | ||
4499 | if (rmdir(path)) | |
4500 | SYSERROR("Error removing directory %s", path); | |
4501 | ||
4502 | return bret; | |
4503 | } | |
4504 | ||
858377e4 | 4505 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b SH |
4506 | { |
4507 | char clonelxcpath[MAXPATHLEN]; | |
4508 | ||
4509 | if (!c || !c->name || !c->config_path || !snapname) | |
4510 | return false; | |
4511 | ||
4512 | if (!get_snappath_dir(c, clonelxcpath)) | |
4513 | return false; | |
4514 | ||
4515 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4516 | } | |
4517 | ||
858377e4 SH |
4518 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4519 | ||
4520 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b SH |
4521 | { |
4522 | char clonelxcpath[MAXPATHLEN]; | |
4523 | ||
4524 | if (!c || !c->name || !c->config_path) | |
4525 | return false; | |
4526 | ||
4527 | if (!get_snappath_dir(c, clonelxcpath)) | |
4528 | return false; | |
4529 | ||
4530 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4531 | } |
4532 | ||
858377e4 SH |
4533 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4534 | ||
4535 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd SH |
4536 | { |
4537 | return lxc_try_cmd(c->name, c->config_path) == 0; | |
4538 | } | |
4539 | ||
858377e4 SH |
4540 | WRAP_API(bool, lxcapi_may_control) |
4541 | ||
d5aa23e6 | 4542 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4543 | struct stat *st) |
d5aa23e6 | 4544 | { |
b69dfc9f CB |
4545 | int ret; |
4546 | char *tmp; | |
4547 | pid_t pid; | |
d5aa23e6 SH |
4548 | char chrootpath[MAXPATHLEN]; |
4549 | char *directory_path = NULL; | |
d5aa23e6 | 4550 | |
b69dfc9f CB |
4551 | pid = fork(); |
4552 | if (pid < 0) { | |
4553 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4554 | return false; |
4555 | } | |
b69dfc9f | 4556 | |
d5aa23e6 | 4557 | if (pid) { |
b69dfc9f CB |
4558 | ret = wait_for_pid(pid); |
4559 | if (ret != 0) { | |
4560 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4561 | return false; |
4562 | } | |
b69dfc9f | 4563 | |
d5aa23e6 SH |
4564 | return true; |
4565 | } | |
4566 | ||
4567 | /* prepare the path */ | |
4568 | ret = snprintf(chrootpath, MAXPATHLEN, "/proc/%d/root", init_pid); | |
4569 | if (ret < 0 || ret >= MAXPATHLEN) | |
4570 | return false; | |
4571 | ||
b69dfc9f CB |
4572 | ret = chroot(chrootpath); |
4573 | if (ret < 0) | |
a7764ce7 | 4574 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4575 | |
4576 | ret = chdir("/"); | |
4577 | if (ret < 0) | |
a7764ce7 | 4578 | _exit(EXIT_FAILURE); |
b69dfc9f | 4579 | |
d5aa23e6 | 4580 | /* remove path if it exists */ |
b69dfc9f CB |
4581 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4582 | if(ret == 0) { | |
4583 | ret = unlink(path); | |
c7d76c09 | 4584 | if (ret < 0) { |
6d1400b5 | 4585 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4586 | _exit(EXIT_FAILURE); |
c7d76c09 | 4587 | } |
d5aa23e6 | 4588 | } |
b69dfc9f | 4589 | |
d5aa23e6 | 4590 | if (!add) |
a7764ce7 | 4591 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4592 | |
4593 | /* create any missing directories */ | |
b69dfc9f CB |
4594 | tmp = strdup(path); |
4595 | if (!tmp) | |
a7764ce7 | 4596 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4597 | |
4598 | directory_path = dirname(tmp); | |
4599 | ret = mkdir_p(directory_path, 0755); | |
4600 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4601 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4602 | free(tmp); |
a7764ce7 | 4603 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4604 | } |
4605 | ||
4606 | /* create the device node */ | |
b69dfc9f CB |
4607 | ret = mknod(path, st->st_mode, st->st_rdev); |
4608 | free(tmp); | |
c7d76c09 | 4609 | if (ret < 0) { |
6d1400b5 | 4610 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4611 | _exit(EXIT_FAILURE); |
c7d76c09 | 4612 | } |
d5aa23e6 | 4613 | |
a7764ce7 | 4614 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4615 | } |
4616 | ||
f0ca2726 | 4617 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4618 | { |
4619 | int ret; | |
4620 | struct stat st; | |
238b3e5e | 4621 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4622 | const char *p; |
a9a0ed90 ÇO |
4623 | |
4624 | /* make sure container is running */ | |
858377e4 | 4625 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4626 | ERROR("container is not running"); |
d5aa23e6 | 4627 | return false; |
a9a0ed90 ÇO |
4628 | } |
4629 | ||
4630 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4631 | p = dest_path ? dest_path : src_path; | |
4632 | ||
a9a0ed90 ÇO |
4633 | /* make sure we can access p */ |
4634 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4635 | return false; |
a9a0ed90 ÇO |
4636 | |
4637 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4638 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4639 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4640 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4641 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4642 | else |
d5aa23e6 | 4643 | return false; |
a9a0ed90 ÇO |
4644 | |
4645 | /* check snprintf return code */ | |
238b3e5e | 4646 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4647 | return false; |
a9a0ed90 | 4648 | |
858377e4 | 4649 | if (!do_add_remove_node(do_lxcapi_init_pid(c), p, add, &st)) |
d5aa23e6 | 4650 | return false; |
a9a0ed90 | 4651 | |
d5aa23e6 | 4652 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4653 | if (add) { |
858377e4 | 4654 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4655 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4656 | return false; |
a9a0ed90 ÇO |
4657 | } |
4658 | } else { | |
858377e4 | 4659 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4660 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4661 | return false; |
a9a0ed90 ÇO |
4662 | } |
4663 | } | |
d5aa23e6 | 4664 | |
a9a0ed90 | 4665 | return true; |
a9a0ed90 ÇO |
4666 | } |
4667 | ||
858377e4 | 4668 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4669 | { |
e0010464 | 4670 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4671 | if (am_host_unpriv()) { |
238b3e5e | 4672 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4673 | return false; |
4674 | } | |
a73846d8 | 4675 | |
a9a0ed90 ÇO |
4676 | return add_remove_device_node(c, src_path, dest_path, true); |
4677 | } | |
4678 | ||
858377e4 SH |
4679 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4680 | ||
4681 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4682 | { |
e0010464 | 4683 | if (am_guest_unpriv()) { |
238b3e5e | 4684 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4685 | return false; |
4686 | } | |
a73846d8 | 4687 | |
a9a0ed90 ÇO |
4688 | return add_remove_device_node(c, src_path, dest_path, false); |
4689 | } | |
4690 | ||
858377e4 SH |
4691 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4692 | ||
c7d76c09 CB |
4693 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4694 | const char *ifname, | |
4695 | const char *dst_ifname) | |
e58fae8f | 4696 | { |
c7d76c09 | 4697 | pid_t init_pid; |
e58fae8f | 4698 | int ret = 0; |
c7d76c09 | 4699 | |
e0010464 | 4700 | if (am_guest_unpriv()) { |
238b3e5e | 4701 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4702 | return false; |
4703 | } | |
4704 | ||
4705 | if (!ifname) { | |
4706 | ERROR("No source interface name given"); | |
4707 | return false; | |
4708 | } | |
4709 | ||
4710 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4711 | if (ret > 0) { |
4712 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4713 | ret = lxc_netdev_down(ifname); |
4714 | if (ret) | |
4715 | goto err; | |
4716 | } | |
4717 | ||
c7d76c09 CB |
4718 | init_pid = do_lxcapi_init_pid(c); |
4719 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); | |
e58fae8f DY |
4720 | if (ret) |
4721 | goto err; | |
4722 | ||
c7d76c09 | 4723 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4724 | return true; |
e5848d39 | 4725 | |
e58fae8f | 4726 | err: |
e58fae8f DY |
4727 | return false; |
4728 | } | |
4729 | ||
858377e4 SH |
4730 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4731 | ||
c7d76c09 CB |
4732 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4733 | const char *ifname, | |
4734 | const char *dst_ifname) | |
e58fae8f | 4735 | { |
c7d76c09 | 4736 | int ret; |
e58fae8f DY |
4737 | pid_t pid, pid_outside; |
4738 | ||
e0010464 SH |
4739 | /* |
4740 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4741 | * But for other types guest privilege suffices. | |
4742 | */ | |
4743 | if (am_guest_unpriv()) { | |
238b3e5e | 4744 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4745 | return false; |
4746 | } | |
4747 | ||
4748 | if (!ifname) { | |
4749 | ERROR("No source interface name given"); | |
4750 | return false; | |
4751 | } | |
4752 | ||
0059379f | 4753 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4754 | pid = fork(); |
4755 | if (pid < 0) { | |
c7d76c09 | 4756 | ERROR("Failed to fork"); |
e58fae8f DY |
4757 | return false; |
4758 | } | |
4759 | ||
1a0e70ac | 4760 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4761 | pid_t init_pid; |
4762 | ||
4763 | init_pid = do_lxcapi_init_pid(c); | |
4764 | if (!switch_to_ns(init_pid, "net")) { | |
4765 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4766 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4767 | } |
4768 | ||
4769 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4770 | if (ret < 0) { |
4771 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4772 | _exit(EXIT_FAILURE); |
c7d76c09 | 4773 | } |
e58fae8f DY |
4774 | |
4775 | /* netdev of ifname is up. */ | |
4776 | if (ret) { | |
4777 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4778 | if (ret) { |
4779 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4780 | _exit(EXIT_FAILURE); |
c7d76c09 | 4781 | } |
e58fae8f DY |
4782 | } |
4783 | ||
4784 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4785 | /* -EINVAL means there is no netdev named as ifname. */ |
4786 | if (ret < 0) { | |
4787 | if (ret == -EINVAL) | |
4788 | ERROR("Network device \"%s\" not found", ifname); | |
4789 | else | |
4790 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4791 | |
8d7b6c25 | 4792 | _exit(EXIT_FAILURE); |
e58fae8f | 4793 | } |
c7d76c09 | 4794 | |
8d7b6c25 | 4795 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4796 | } |
4797 | ||
c7d76c09 CB |
4798 | ret = wait_for_pid(pid); |
4799 | if (ret != 0) | |
e58fae8f DY |
4800 | return false; |
4801 | ||
c7d76c09 | 4802 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4803 | return true; |
4804 | } | |
4805 | ||
858377e4 SH |
4806 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4807 | ||
aef3d51e TA |
4808 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4809 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4810 | { |
6b9be523 | 4811 | int ret = -1; |
2cb80427 | 4812 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4813 | uint64_t features_to_check = 0; |
85c50991 | 4814 | |
aef3d51e TA |
4815 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4816 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4817 | * to do anything special. | |
4818 | */ | |
4819 | if (size > sizeof(*opts)) { | |
4820 | unsigned char *addr; | |
4821 | unsigned char *end; | |
4822 | ||
4823 | addr = (void *)opts + sizeof(*opts); | |
4824 | end = (void *)opts + size; | |
a73846d8 | 4825 | |
4826 | for (; addr < end; addr++) | |
4827 | if (*addr) | |
aef3d51e | 4828 | return -E2BIG; |
85c50991 TA |
4829 | } |
4830 | ||
2cb80427 TA |
4831 | /* If the caller has a smaller struct, let's zero out the end for them |
4832 | * so we don't accidentally use bits of it that they didn't know about | |
4833 | * to initialize. | |
4834 | */ | |
4835 | if (size < sizeof(*opts)) { | |
4836 | valid_opts = malloc(sizeof(*opts)); | |
4837 | if (!valid_opts) | |
4838 | return -ENOMEM; | |
4839 | ||
4840 | memset(valid_opts, 0, sizeof(*opts)); | |
4841 | memcpy(valid_opts, opts, size); | |
4842 | } | |
4843 | ||
aef3d51e TA |
4844 | switch (cmd) { |
4845 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4846 | if (!do_lxcapi_is_running(c)) { |
4847 | ERROR("container is not running"); | |
6b9be523 | 4848 | goto on_error; |
7ad13c91 | 4849 | } |
a73846d8 | 4850 | |
2cb80427 | 4851 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4852 | break; |
4853 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4854 | if (!do_lxcapi_is_running(c)) { |
4855 | ERROR("container is not running"); | |
6b9be523 | 4856 | goto on_error; |
7ad13c91 | 4857 | } |
a73846d8 | 4858 | |
2cb80427 | 4859 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4860 | break; |
4861 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4862 | if (do_lxcapi_is_running(c)) { |
4863 | ERROR("container is already running"); | |
6b9be523 | 4864 | goto on_error; |
7ad13c91 | 4865 | } |
a73846d8 | 4866 | |
2cb80427 | 4867 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4868 | break; |
b5b12b9e AR |
4869 | case MIGRATE_FEATURE_CHECK: |
4870 | features_to_check = valid_opts->features_to_check; | |
4871 | ret = !__criu_check_feature(&features_to_check); | |
4872 | if (ret) { | |
4873 | /* Something went wrong. Let's let the caller | |
4874 | * know which feature checks failed. */ | |
4875 | valid_opts->features_to_check = features_to_check; | |
4876 | } | |
4877 | break; | |
aef3d51e TA |
4878 | default: |
4879 | ERROR("invalid migrate command %u", cmd); | |
4880 | ret = -EINVAL; | |
4881 | } | |
735f2c6e | 4882 | |
6b9be523 | 4883 | on_error: |
f686506d TA |
4884 | if (size < sizeof(*opts)) |
4885 | free(valid_opts); | |
4886 | ||
aef3d51e TA |
4887 | return ret; |
4888 | } | |
735f2c6e | 4889 | |
aef3d51e | 4890 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4891 | |
aef3d51e TA |
4892 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4893 | { | |
ebb088e1 AR |
4894 | struct migrate_opts opts; |
4895 | ||
4896 | memset(&opts, 0, sizeof(opts)); | |
4897 | ||
4898 | opts.directory = directory; | |
4899 | opts.stop = stop; | |
4900 | opts.verbose = verbose; | |
735f2c6e | 4901 | |
aef3d51e | 4902 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4903 | } |
4904 | ||
858377e4 SH |
4905 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4906 | ||
4907 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4908 | { |
ebb088e1 AR |
4909 | struct migrate_opts opts; |
4910 | ||
4911 | memset(&opts, 0, sizeof(opts)); | |
4912 | ||
4913 | opts.directory = directory; | |
4914 | opts.verbose = verbose; | |
c9d8f2ee | 4915 | |
aef3d51e | 4916 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4917 | } |
4918 | ||
858377e4 SH |
4919 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4920 | ||
1f5a90f9 CB |
4921 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4922 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4923 | { | |
4924 | char *dirdup, *destdirname; | |
4925 | int ret; | |
4926 | ||
4927 | dirdup = strdup(dest); | |
4928 | if (!dirdup) { | |
4929 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4930 | return -1; | |
4931 | } | |
4932 | destdirname = dirname(dirdup); | |
4933 | ||
4934 | ret = mkdir_p(destdirname, 0755); | |
4935 | if (ret < 0) { | |
4936 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4937 | free(dirdup); | |
4938 | return ret; | |
4939 | } | |
4940 | free(dirdup); | |
4941 | ||
4942 | (void)remove(dest); | |
4943 | ||
4944 | if (S_ISDIR(st_mode)) | |
4945 | ret = mkdir(dest, 0000); | |
4946 | else | |
4947 | ret = mknod(dest, S_IFREG | 0000, 0); | |
4948 | if (ret < 0) { | |
4949 | SYSERROR("Failed to create mount target \"%s\"", dest); | |
4950 | return -1; | |
4951 | } | |
4952 | ||
4953 | return 0; | |
4954 | } | |
4955 | ||
3340f441 CB |
4956 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
4957 | const char *target, const char *filesystemtype, | |
4958 | unsigned long mountflags, const void *data, | |
4959 | struct lxc_mount *mnt) | |
4960 | { | |
29df56cd LT |
4961 | char *suff, *sret; |
4962 | char template[MAXPATHLEN], path[MAXPATHLEN]; | |
4963 | pid_t pid, init_pid; | |
c6885c3f | 4964 | struct stat sb; |
29df56cd LT |
4965 | int ret = -1, fd = -EBADF; |
4966 | ||
4967 | if (!c || !c->lxc_conf) { | |
4968 | ERROR("Container or configuration is NULL"); | |
4969 | return -EINVAL; | |
4970 | } | |
4971 | ||
7a41e857 | 4972 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
4973 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
4974 | return -EINVAL; | |
4975 | } | |
29df56cd | 4976 | |
60534030 LT |
4977 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
4978 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
4979 | SYSERROR("Error writing shmounts tempdir name"); |
4980 | goto out; | |
4981 | } | |
4982 | ||
c6885c3f LT |
4983 | /* Create a temporary file / dir under the shared mountpoint */ |
4984 | if (!source || strcmp(source, "") == 0) { | |
4985 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
4986 | sb.st_mode = S_IFDIR; | |
4987 | } else { | |
4988 | ret = stat(source, &sb); | |
4989 | if (ret < 0) { | |
4990 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
4991 | goto out; | |
4992 | } | |
4993 | } | |
4994 | ||
3340f441 | 4995 | if (S_ISDIR(sb.st_mode)) { |
c6885c3f LT |
4996 | sret = mkdtemp(template); |
4997 | if (!sret) { | |
4998 | SYSERROR("Could not create shmounts temporary dir"); | |
4999 | goto out; | |
5000 | } | |
c6885c3f LT |
5001 | } else { |
5002 | fd = lxc_make_tmpfile(template, false); | |
5003 | if (fd < 0) { | |
5004 | SYSERROR("Could not create shmounts temporary file"); | |
5005 | goto out; | |
5006 | } | |
29df56cd LT |
5007 | } |
5008 | ||
5009 | /* Do the fork */ | |
5010 | pid = fork(); | |
5011 | if (pid < 0) { | |
5012 | SYSERROR("Could not fork"); | |
5013 | goto out; | |
5014 | } | |
5015 | ||
5016 | if (pid == 0) { | |
5017 | /* Do the mount */ | |
5018 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5019 | if (ret < 0) { | |
c6885c3f | 5020 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5021 | _exit(EXIT_FAILURE); |
5022 | } | |
3340f441 | 5023 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5024 | |
5025 | init_pid = do_lxcapi_init_pid(c); | |
5026 | if (init_pid < 0) { | |
5027 | ERROR("Failed to obtain container's init pid"); | |
5028 | _exit(EXIT_FAILURE); | |
5029 | } | |
5030 | ||
5031 | /* Enter the container namespaces */ | |
5032 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5033 | if (!switch_to_ns(init_pid, "user")){ | |
5034 | ERROR("Failed to enter user namespace"); | |
5035 | _exit(EXIT_FAILURE); | |
5036 | } | |
5037 | } | |
3340f441 | 5038 | |
29df56cd LT |
5039 | if (!switch_to_ns(init_pid, "mnt")) { |
5040 | ERROR("Failed to enter mount namespace"); | |
5041 | _exit(EXIT_FAILURE); | |
5042 | } | |
5043 | ||
1f5a90f9 | 5044 | ret = create_mount_target(target, sb.st_mode); |
c6885c3f LT |
5045 | if (ret < 0) |
5046 | _exit(EXIT_FAILURE); | |
3340f441 | 5047 | TRACE("Created mount target \"%s\"", target); |
c6885c3f | 5048 | |
29df56cd LT |
5049 | suff = strrchr(template, '/'); |
5050 | if (!suff) | |
5051 | _exit(EXIT_FAILURE); | |
5052 | ||
60534030 LT |
5053 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5054 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd LT |
5055 | SYSERROR("Error writing container mountpoint name"); |
5056 | _exit(EXIT_FAILURE); | |
5057 | } | |
5058 | ||
3340f441 | 5059 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5060 | if (ret < 0) { |
5061 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
5062 | _exit(EXIT_FAILURE); | |
5063 | } | |
3340f441 | 5064 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5065 | |
5066 | _exit(EXIT_SUCCESS); | |
5067 | } | |
5068 | ||
5069 | ret = wait_for_pid(pid); | |
5070 | if (ret < 0) { | |
5071 | SYSERROR("Wait for the child with pid %ld failed", (long) pid); | |
5072 | goto out; | |
5073 | } | |
5074 | ||
5075 | ret = 0; | |
5076 | ||
5077 | (void)umount2(template, MNT_DETACH); | |
5078 | (void)unlink(template); | |
5079 | ||
5080 | out: | |
5081 | if (fd >= 0) | |
5082 | close(fd); | |
3340f441 | 5083 | |
29df56cd LT |
5084 | return ret; |
5085 | } | |
5086 | ||
5087 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5088 | unsigned long, const void *, struct lxc_mount *) |
5089 | ||
5090 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5091 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5092 | { |
5093 | pid_t pid, init_pid; | |
5094 | int ret = -1; | |
5095 | ||
5096 | if (!c || !c->lxc_conf) { | |
5097 | ERROR("Container or configuration is NULL"); | |
5098 | return -EINVAL; | |
5099 | } | |
5100 | ||
5101 | /* Do the fork */ | |
5102 | pid = fork(); | |
5103 | if (pid < 0) { | |
5104 | SYSERROR("Could not fork"); | |
5105 | return -1; | |
5106 | } | |
5107 | ||
5108 | if (pid == 0) { | |
5109 | init_pid = do_lxcapi_init_pid(c); | |
5110 | if (init_pid < 0) { | |
5111 | ERROR("Failed to obtain container's init pid"); | |
5112 | _exit(EXIT_FAILURE); | |
5113 | } | |
5114 | ||
5115 | /* Enter the container namespaces */ | |
5116 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5117 | if (!switch_to_ns(init_pid, "user")) { | |
5118 | ERROR("Failed to enter user namespace"); | |
5119 | _exit(EXIT_FAILURE); | |
5120 | } | |
5121 | } | |
5122 | ||
5123 | if (!switch_to_ns(init_pid, "mnt")) { | |
5124 | ERROR("Failed to enter mount namespace"); | |
5125 | _exit(EXIT_FAILURE); | |
5126 | } | |
5127 | ||
5128 | /* Do the unmount */ | |
7a41e857 | 5129 | ret = umount2(target, flags); |
d83da817 LT |
5130 | if (ret < 0) { |
5131 | SYSERROR("Failed to umount \"%s\"", target); | |
5132 | _exit(EXIT_FAILURE); | |
5133 | } | |
5134 | ||
5135 | _exit(EXIT_SUCCESS); | |
5136 | } | |
5137 | ||
5138 | ret = wait_for_pid(pid); | |
5139 | if (ret < 0) { | |
5140 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5141 | return -ret; | |
5142 | } | |
5143 | ||
5144 | return 0; | |
5145 | } | |
5146 | ||
5147 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5148 | |
a0e93eeb CS |
5149 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5150 | { | |
5151 | va_list ap; | |
5152 | const char **argv; | |
5153 | int ret; | |
5154 | ||
5155 | if (!c) | |
5156 | return -1; | |
5157 | ||
858377e4 SH |
5158 | current_config = c->lxc_conf; |
5159 | ||
a0e93eeb CS |
5160 | va_start(ap, arg); |
5161 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5162 | va_end(ap); | |
5163 | ||
5164 | if (!argv) { | |
5165 | ERROR("Memory allocation error."); | |
858377e4 SH |
5166 | ret = -1; |
5167 | goto out; | |
a0e93eeb CS |
5168 | } |
5169 | argv[0] = arg; | |
5170 | ||
858377e4 | 5171 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5172 | free((void*)argv); |
a73846d8 | 5173 | |
858377e4 SH |
5174 | out: |
5175 | current_config = NULL; | |
a0e93eeb CS |
5176 | return ret; |
5177 | } | |
5178 | ||
afeecbba | 5179 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5180 | { |
5181 | struct lxc_container *c; | |
cbb9c7c7 | 5182 | size_t len; |
72d0e1cb | 5183 | |
18aa217b SH |
5184 | if (!name) |
5185 | return NULL; | |
5186 | ||
72d0e1cb SG |
5187 | c = malloc(sizeof(*c)); |
5188 | if (!c) { | |
e9e29a33 | 5189 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5190 | return NULL; |
5191 | } | |
5192 | memset(c, 0, sizeof(*c)); | |
5193 | ||
afeecbba SH |
5194 | if (configpath) |
5195 | c->config_path = strdup(configpath); | |
5196 | else | |
593e8478 | 5197 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5198 | if (!c->config_path) { |
e9e29a33 | 5199 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5200 | goto err; |
5201 | } | |
5202 | ||
f5dd1d53 | 5203 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5204 | |
5205 | len = strlen(name); | |
5206 | c->name = malloc(len + 1); | |
72d0e1cb | 5207 | if (!c->name) { |
e9e29a33 | 5208 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5209 | goto err; |
5210 | } | |
cbb9c7c7 | 5211 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5212 | |
5213 | c->numthreads = 1; | |
e9e29a33 CB |
5214 | c->slock = lxc_newlock(c->config_path, name); |
5215 | if (!c->slock) { | |
5216 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5217 | goto err; |
5218 | } | |
5219 | ||
e9e29a33 CB |
5220 | c->privlock = lxc_newlock(NULL, NULL); |
5221 | if (!c->privlock) { | |
5222 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5223 | goto err; |
5224 | } | |
5225 | ||
afeecbba | 5226 | if (!set_config_filename(c)) { |
e9e29a33 | 5227 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5228 | goto err; |
5229 | } | |
72d0e1cb | 5230 | |
e9e29a33 CB |
5231 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5232 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5233 | goto err; |
e9e29a33 | 5234 | } |
72d0e1cb | 5235 | |
3e625e2d | 5236 | if (ongoing_create(c) == 2) { |
e9e29a33 | 5237 | ERROR("Failed to complete container creation for %s", c->name); |
17a367d8 | 5238 | container_destroy(c, NULL); |
4df7f012 | 5239 | lxcapi_clear_config(c); |
3e625e2d | 5240 | } |
a73846d8 | 5241 | |
a2739df5 | 5242 | c->daemonize = true; |
72cf75fa | 5243 | c->pidfile = NULL; |
3e625e2d | 5244 | |
1a0e70ac | 5245 | /* Assign the member functions. */ |
72d0e1cb SG |
5246 | c->is_defined = lxcapi_is_defined; |
5247 | c->state = lxcapi_state; | |
5248 | c->is_running = lxcapi_is_running; | |
5249 | c->freeze = lxcapi_freeze; | |
5250 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5251 | c->console = lxcapi_console; |
b5159817 | 5252 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5253 | c->init_pid = lxcapi_init_pid; |
5254 | c->load_config = lxcapi_load_config; | |
5255 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5256 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5257 | c->start = lxcapi_start; |
5258 | c->startl = lxcapi_startl; | |
5259 | c->stop = lxcapi_stop; | |
5260 | c->config_file_name = lxcapi_config_file_name; | |
5261 | c->wait = lxcapi_wait; | |
5262 | c->set_config_item = lxcapi_set_config_item; | |
5263 | c->destroy = lxcapi_destroy; | |
18aa217b | 5264 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5265 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5266 | c->save_config = lxcapi_save_config; |
5267 | c->get_keys = lxcapi_get_keys; | |
5268 | c->create = lxcapi_create; | |
5269 | c->createl = lxcapi_createl; | |
5270 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5271 | c->reboot = lxcapi_reboot; |
d39b10eb | 5272 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5273 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5274 | c->clear_config_item = lxcapi_clear_config_item; |
5275 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5276 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5277 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5278 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5279 | c->get_config_path = lxcapi_get_config_path; |
5280 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5281 | c->clone = lxcapi_clone; |
799f29ab | 5282 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5283 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5284 | c->attach = lxcapi_attach; |
5285 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5286 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5287 | c->snapshot = lxcapi_snapshot; |
5288 | c->snapshot_list = lxcapi_snapshot_list; | |
5289 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5290 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5291 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5292 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5293 | c->add_device_node = lxcapi_add_device_node; |
5294 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5295 | c->attach_interface = lxcapi_attach_interface; |
5296 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5297 | c->checkpoint = lxcapi_checkpoint; |
5298 | c->restore = lxcapi_restore; | |
aef3d51e | 5299 | c->migrate = lxcapi_migrate; |
191d43cc | 5300 | c->console_log = lxcapi_console_log; |
29df56cd | 5301 | c->mount = lxcapi_mount; |
d83da817 | 5302 | c->umount = lxcapi_umount; |
72d0e1cb | 5303 | |
72d0e1cb SG |
5304 | return c; |
5305 | ||
5306 | err: | |
5307 | lxc_container_free(c); | |
5308 | return NULL; | |
5309 | } | |
5310 | ||
4a7c7daa | 5311 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5312 | { |
5313 | int i; | |
5314 | ||
5315 | if (states) | |
5316 | for (i=0; i<MAX_STATE; i++) | |
5317 | states[i] = lxc_state2str(i); | |
a73846d8 | 5318 | |
72d0e1cb SG |
5319 | return MAX_STATE; |
5320 | } | |
a41f104b | 5321 | |
a41f104b SH |
5322 | /* |
5323 | * These next two could probably be done smarter with reusing a common function | |
5324 | * with different iterators and tests... | |
5325 | */ | |
5326 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5327 | { | |
5328 | DIR *dir; | |
5329 | int i, cfound = 0, nfound = 0; | |
74f96976 | 5330 | struct dirent *direntp; |
a41f104b SH |
5331 | struct lxc_container *c; |
5332 | ||
5333 | if (!lxcpath) | |
593e8478 | 5334 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5335 | |
a41f104b | 5336 | dir = opendir(lxcpath); |
a41f104b SH |
5337 | if (!dir) { |
5338 | SYSERROR("opendir on lxcpath"); | |
5339 | return -1; | |
5340 | } | |
5341 | ||
5342 | if (cret) | |
5343 | *cret = NULL; | |
a73846d8 | 5344 | |
a41f104b SH |
5345 | if (names) |
5346 | *names = NULL; | |
5347 | ||
74f96976 | 5348 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5349 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5350 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5351 | continue; |
5352 | ||
5353 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5354 | continue; | |
5355 | ||
a73846d8 | 5356 | if (names) |
9c88ff1f | 5357 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5358 | goto free_bad; |
a73846d8 | 5359 | |
a41f104b SH |
5360 | cfound++; |
5361 | ||
5362 | if (!cret) { | |
5363 | nfound++; | |
5364 | continue; | |
5365 | } | |
5366 | ||
5367 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5368 | if (!c) { | |
5369 | INFO("Container %s:%s has a config but could not be loaded", | |
5370 | lxcpath, direntp->d_name); | |
a73846d8 | 5371 | |
a41f104b | 5372 | if (names) |
9c88ff1f ÇO |
5373 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5374 | goto free_bad; | |
a73846d8 | 5375 | |
a41f104b SH |
5376 | continue; |
5377 | } | |
a73846d8 | 5378 | |
858377e4 | 5379 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5380 | INFO("Container %s:%s has a config but is not defined", |
5381 | lxcpath, direntp->d_name); | |
a73846d8 | 5382 | |
a41f104b | 5383 | if (names) |
9c88ff1f ÇO |
5384 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5385 | goto free_bad; | |
a73846d8 | 5386 | |
a41f104b SH |
5387 | lxc_container_put(c); |
5388 | continue; | |
5389 | } | |
5390 | ||
2871830a | 5391 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5392 | lxc_container_put(c); |
5393 | goto free_bad; | |
5394 | } | |
a73846d8 | 5395 | |
a41f104b SH |
5396 | nfound++; |
5397 | } | |
5398 | ||
a41f104b | 5399 | closedir(dir); |
a41f104b SH |
5400 | return nfound; |
5401 | ||
5402 | free_bad: | |
5403 | if (names && *names) { | |
5404 | for (i=0; i<cfound; i++) | |
5405 | free((*names)[i]); | |
5406 | free(*names); | |
5407 | } | |
a73846d8 | 5408 | |
a41f104b SH |
5409 | if (cret && *cret) { |
5410 | for (i=0; i<nfound; i++) | |
5411 | lxc_container_put((*cret)[i]); | |
5412 | free(*cret); | |
5413 | } | |
a73846d8 | 5414 | |
a41f104b | 5415 | closedir(dir); |
a41f104b SH |
5416 | return -1; |
5417 | } | |
5418 | ||
148a9d27 DE |
5419 | int list_active_containers(const char *lxcpath, char ***nret, |
5420 | struct lxc_container ***cret) | |
a41f104b | 5421 | { |
148a9d27 | 5422 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5423 | int lxcpath_len; |
5424 | char *line = NULL; | |
148a9d27 | 5425 | char **ct_name = NULL; |
a41f104b | 5426 | size_t len = 0; |
97bc2422 | 5427 | struct lxc_container *c = NULL; |
88556fd7 | 5428 | bool is_hashed; |
a41f104b SH |
5429 | |
5430 | if (!lxcpath) | |
593e8478 | 5431 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5432 | lxcpath_len = strlen(lxcpath); |
5433 | ||
5434 | if (cret) | |
5435 | *cret = NULL; | |
a73846d8 | 5436 | |
148a9d27 DE |
5437 | if (nret) |
5438 | *nret = NULL; | |
a41f104b | 5439 | |
a41f104b | 5440 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
5441 | if (!f) |
5442 | return -1; | |
5443 | ||
5444 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5445 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5446 | if (!p) |
5447 | continue; | |
5448 | p++; | |
a73846d8 | 5449 | |
a41f104b SH |
5450 | if (*p != 0x40) |
5451 | continue; | |
5452 | p++; | |
88556fd7 ÇO |
5453 | |
5454 | is_hashed = false; | |
a73846d8 | 5455 | |
88556fd7 ÇO |
5456 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5457 | p += lxcpath_len; | |
5458 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5459 | p += 4; | |
5460 | is_hashed = true; | |
5461 | } else { | |
a41f104b | 5462 | continue; |
88556fd7 ÇO |
5463 | } |
5464 | ||
a41f104b SH |
5465 | while (*p == '/') |
5466 | p++; | |
5467 | ||
1a0e70ac | 5468 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5469 | p2 = strchr(p, '/'); |
a41f104b SH |
5470 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5471 | continue; | |
5472 | *p2 = '\0'; | |
5473 | ||
88556fd7 | 5474 | if (is_hashed) { |
899a9f55 CB |
5475 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5476 | if (!recvpath) | |
5477 | continue; | |
a73846d8 | 5478 | |
e07eafa8 L |
5479 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5480 | free(recvpath); | |
88556fd7 | 5481 | continue; |
e07eafa8 L |
5482 | } |
5483 | free(recvpath); | |
a73846d8 | 5484 | |
88556fd7 | 5485 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5486 | if (!p) |
5487 | continue; | |
88556fd7 ÇO |
5488 | } |
5489 | ||
e07eafa8 L |
5490 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5491 | if (is_hashed) | |
5492 | free(p); | |
9c88ff1f | 5493 | continue; |
e07eafa8 | 5494 | } |
9c88ff1f | 5495 | |
e07eafa8 L |
5496 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5497 | if (is_hashed) | |
5498 | free(p); | |
148a9d27 | 5499 | goto free_cret_list; |
e07eafa8 | 5500 | } |
9c88ff1f | 5501 | |
148a9d27 | 5502 | ct_name_cnt++; |
a41f104b | 5503 | |
e07eafa8 L |
5504 | if (!cret) { |
5505 | if (is_hashed) | |
5506 | free(p); | |
a41f104b | 5507 | continue; |
e07eafa8 | 5508 | } |
a41f104b SH |
5509 | |
5510 | c = lxc_container_new(p, lxcpath); | |
5511 | if (!c) { | |
5512 | INFO("Container %s:%s is running but could not be loaded", | |
5513 | lxcpath, p); | |
a73846d8 | 5514 | |
148a9d27 | 5515 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5516 | if (is_hashed) |
5517 | free(p); | |
a73846d8 | 5518 | |
a41f104b SH |
5519 | continue; |
5520 | } | |
5521 | ||
e07eafa8 L |
5522 | if (is_hashed) |
5523 | free(p); | |
5524 | ||
a41f104b SH |
5525 | /* |
5526 | * If this is an anonymous container, then is_defined *can* | |
5527 | * return false. So we don't do that check. Count on the | |
5528 | * fact that the command socket exists. | |
5529 | */ | |
5530 | ||
148a9d27 | 5531 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5532 | lxc_container_put(c); |
148a9d27 | 5533 | goto free_cret_list; |
a41f104b | 5534 | } |
a73846d8 | 5535 | |
148a9d27 | 5536 | cret_cnt++; |
a41f104b SH |
5537 | } |
5538 | ||
97bc2422 CB |
5539 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5540 | if (c) | |
5541 | lxc_container_put(c); | |
5542 | goto free_cret_list; | |
5543 | } | |
5544 | ||
148a9d27 DE |
5545 | ret = ct_name_cnt; |
5546 | if (nret) | |
5547 | *nret = ct_name; | |
5548 | else | |
5549 | goto free_ct_name; | |
a73846d8 | 5550 | |
148a9d27 | 5551 | goto out; |
a41f104b | 5552 | |
148a9d27 | 5553 | free_cret_list: |
a41f104b | 5554 | if (cret && *cret) { |
148a9d27 | 5555 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5556 | lxc_container_put((*cret)[i]); |
5557 | free(*cret); | |
5558 | } | |
148a9d27 DE |
5559 | |
5560 | free_ct_name: | |
5561 | if (ct_name) { | |
5562 | for (i = 0; i < ct_name_cnt; i++) | |
5563 | free(ct_name[i]); | |
5564 | free(ct_name); | |
5565 | } | |
5566 | ||
5567 | out: | |
f10fad2f | 5568 | free(line); |
a41f104b | 5569 | fclose(f); |
148a9d27 | 5570 | return ret; |
a41f104b | 5571 | } |
2871830a DE |
5572 | |
5573 | int list_all_containers(const char *lxcpath, char ***nret, | |
5574 | struct lxc_container ***cret) | |
5575 | { | |
5576 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5577 | char **active_name; | |
5578 | char **ct_name; | |
5579 | struct lxc_container **ct_list = NULL; | |
5580 | ||
5581 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5582 | if (ct_cnt < 0) | |
5583 | return ct_cnt; | |
5584 | ||
5585 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5586 | if (active_cnt < 0) { | |
5587 | ret = active_cnt; | |
5588 | goto free_ct_name; | |
5589 | } | |
5590 | ||
5591 | for (i = 0; i < active_cnt; i++) { | |
5592 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5593 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5594 | ret = -1; | |
5595 | goto free_active_name; | |
5596 | } | |
a73846d8 | 5597 | |
2871830a DE |
5598 | ct_cnt++; |
5599 | } | |
a73846d8 | 5600 | |
2871830a DE |
5601 | free(active_name[i]); |
5602 | active_name[i] = NULL; | |
5603 | } | |
a73846d8 | 5604 | |
2871830a DE |
5605 | free(active_name); |
5606 | active_name = NULL; | |
5607 | active_cnt = 0; | |
5608 | ||
5609 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5610 | struct lxc_container *c; | |
5611 | ||
5612 | c = lxc_container_new(ct_name[i], lxcpath); | |
5613 | if (!c) { | |
5614 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5615 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5616 | continue; | |
5617 | } | |
5618 | ||
5619 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5620 | lxc_container_put(c); | |
5621 | ret = -1; | |
5622 | goto free_ct_list; | |
5623 | } | |
a73846d8 | 5624 | |
2871830a DE |
5625 | ct_list_cnt++; |
5626 | } | |
5627 | ||
5628 | if (cret) | |
5629 | *cret = ct_list; | |
5630 | ||
a73846d8 | 5631 | if (nret) { |
2871830a | 5632 | *nret = ct_name; |
a73846d8 | 5633 | } else { |
2871830a DE |
5634 | ret = ct_cnt; |
5635 | goto free_ct_name; | |
5636 | } | |
a73846d8 | 5637 | |
2871830a DE |
5638 | return ct_cnt; |
5639 | ||
5640 | free_ct_list: | |
5641 | for (i = 0; i < ct_list_cnt; i++) { | |
5642 | lxc_container_put(ct_list[i]); | |
5643 | } | |
f10fad2f | 5644 | free(ct_list); |
2871830a DE |
5645 | |
5646 | free_active_name: | |
5647 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5648 | free(active_name[i]); |
2871830a | 5649 | } |
f10fad2f | 5650 | free(active_name); |
2871830a DE |
5651 | |
5652 | free_ct_name: | |
5653 | for (i = 0; i < ct_cnt; i++) { | |
5654 | free(ct_name[i]); | |
5655 | } | |
5656 | free(ct_name); | |
5657 | return ret; | |
5658 | } | |
12461428 CB |
5659 | |
5660 | bool lxc_config_item_is_supported(const char *key) | |
5661 | { | |
300df83e | 5662 | return !!lxc_get_config(key); |
12461428 | 5663 | } |