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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 | ||
d38dd64a CB |
21 | #ifndef _GNU_SOURCE |
22 | #define _GNU_SOURCE 1 | |
23 | #endif | |
0e14584d | 24 | #include <arpa/inet.h> |
38683db4 | 25 | #include <dirent.h> |
9be53773 | 26 | #include <errno.h> |
93dc5327 | 27 | #include <fcntl.h> |
38683db4 | 28 | #include <grp.h> |
f2363e38 | 29 | #include <libgen.h> |
38683db4 CB |
30 | #include <pthread.h> |
31 | #include <sched.h> | |
32 | #include <stdarg.h> | |
d659597e | 33 | #include <stdint.h> |
9fc7f8c0 | 34 | #include <stdio.h> |
29df56cd | 35 | #include <stdlib.h> |
56474555 | 36 | #include <sys/file.h> |
38683db4 CB |
37 | #include <sys/mman.h> |
38 | #include <sys/mount.h> | |
29df56cd | 39 | #include <sys/stat.h> |
5f7eba0b | 40 | #include <sys/syscall.h> |
0e14584d | 41 | #include <sys/sysmacros.h> |
38683db4 CB |
42 | #include <sys/types.h> |
43 | #include <sys/wait.h> | |
0e14584d | 44 | #include <unistd.h> |
f2363e38 | 45 | |
d38dd64a | 46 | #include "../include/netns_ifaddrs.h" |
5e5576a4 | 47 | #include "af_unix.h" |
aafa5f96 | 48 | #include "api_extensions.h" |
38683db4 | 49 | #include "attach.h" |
38683db4 | 50 | #include "cgroup.h" |
38683db4 | 51 | #include "commands.h" |
92e35018 | 52 | #include "commands_utils.h" |
0e14584d CB |
53 | #include "conf.h" |
54 | #include "config.h" | |
72d0e1cb | 55 | #include "confile.h" |
4222a9f4 | 56 | #include "confile_utils.h" |
e29fe1dd | 57 | #include "criu.h" |
238b3e5e | 58 | #include "error.h" |
a6f151a7 | 59 | #include "initutils.h" |
72d0e1cb | 60 | #include "log.h" |
38683db4 CB |
61 | #include "lxc.h" |
62 | #include "lxccontainer.h" | |
63 | #include "lxclock.h" | |
f2363e38 ÇO |
64 | #include "monitor.h" |
65 | #include "namespace.h" | |
fed29fad | 66 | #include "network.h" |
9994d140 | 67 | #include "parse.h" |
aa460476 | 68 | #include "start.h" |
38683db4 | 69 | #include "state.h" |
28d832c4 CB |
70 | #include "storage.h" |
71 | #include "storage/btrfs.h" | |
72 | #include "storage/overlay.h" | |
0e14584d | 73 | #include "storage_utils.h" |
28d832c4 | 74 | #include "sync.h" |
0ed9b1bc | 75 | #include "terminal.h" |
38683db4 CB |
76 | #include "utils.h" |
77 | #include "version.h" | |
4ba0d9af | 78 | |
af6824fc ST |
79 | /* major()/minor() */ |
80 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 81 | #include <sys/mkdev.h> |
af6824fc | 82 | #endif |
af6824fc | 83 | |
684f79a5 SG |
84 | #if IS_BIONIC |
85 | #include <../include/lxcmntent.h> | |
86 | #else | |
87 | #include <mntent.h> | |
88 | #endif | |
89 | ||
9de31d5a CB |
90 | #ifndef HAVE_STRLCPY |
91 | #include "include/strlcpy.h" | |
92 | #endif | |
93 | ||
5f7eba0b SG |
94 | /* Define faccessat() if missing from the C library */ |
95 | #ifndef HAVE_FACCESSAT | |
96 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
97 | { | |
98 | #ifdef __NR_faccessat | |
238b3e5e | 99 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 100 | #else |
238b3e5e CB |
101 | errno = ENOSYS; |
102 | return -1; | |
5f7eba0b SG |
103 | #endif |
104 | } | |
105 | #endif | |
106 | ||
ac2cecc4 | 107 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 108 | |
858377e4 SH |
109 | static bool do_lxcapi_destroy(struct lxc_container *c); |
110 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
111 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
112 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
113 | static bool container_destroy(struct lxc_container *c, |
114 | struct lxc_storage *storage); | |
858377e4 SH |
115 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
116 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
117 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
118 | ||
a41f104b SH |
119 | static bool config_file_exists(const char *lxcpath, const char *cname) |
120 | { | |
ef1ab8f1 CB |
121 | int ret; |
122 | size_t len; | |
123 | char *fname; | |
a41f104b | 124 | |
ef1ab8f1 CB |
125 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
126 | len = strlen(lxcpath) + strlen(cname) + 9; | |
127 | fname = alloca(len); | |
128 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); | |
129 | if (ret < 0 || (size_t)ret >= len) | |
a41f104b SH |
130 | return false; |
131 | ||
132 | return file_exists(fname); | |
133 | } | |
134 | ||
444249ea CB |
135 | /* A few functions to help detect when a container creation failed. If a |
136 | * container creation was killed partway through, then trying to actually start | |
137 | * that container could harm the host. We detect this by creating a 'partial' | |
138 | * file under the container directory, and keeping an advisory lock. When | |
139 | * container creation completes, we remove that file. When we load or try to | |
140 | * start a container, if we find that file, without a flock, we remove the | |
141 | * container. | |
3e625e2d | 142 | */ |
74a3920a | 143 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 144 | { |
3e625e2d | 145 | int fd, ret; |
444249ea CB |
146 | size_t len; |
147 | char *path; | |
56474555 | 148 | struct flock lk = {0}; |
93dc5327 | 149 | |
444249ea CB |
150 | len = strlen(c->config_path) + strlen(c->name) + 10; |
151 | path = alloca(len); | |
3e625e2d | 152 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
444249ea | 153 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 154 | return -1; |
3e625e2d | 155 | |
d1bc8d48 CB |
156 | fd = open(path, O_RDWR | O_CLOEXEC); |
157 | if (fd < 0) { | |
158 | if (errno != ENOENT) | |
159 | return -1; | |
444249ea | 160 | |
3e625e2d | 161 | return 0; |
d1bc8d48 | 162 | } |
444249ea | 163 | |
93dc5327 SH |
164 | lk.l_type = F_WRLCK; |
165 | lk.l_whence = SEEK_SET; | |
ec74f3f8 CB |
166 | /* F_OFD_GETLK requires that l_pid be set to 0 otherwise the kernel |
167 | * will EINVAL us. | |
168 | */ | |
169 | lk.l_pid = 0; | |
444249ea | 170 | |
56474555 | 171 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
d1bc8d48 | 172 | if (ret < 0 && errno == EINVAL) { |
56474555 | 173 | ret = flock(fd, LOCK_EX | LOCK_NB); |
d1bc8d48 CB |
174 | if (ret < 0 && errno == EWOULDBLOCK) |
175 | ret = 0; | |
176 | } | |
a73846d8 | 177 | |
444249ea | 178 | close(fd); |
a73846d8 | 179 | |
ec74f3f8 CB |
180 | /* F_OFD_GETLK will not send us back a pid so don't check it. */ |
181 | if (ret == 0) | |
182 | /* Create is still ongoing. */ | |
3e625e2d | 183 | return 1; |
444249ea CB |
184 | |
185 | /* Create completed but partial is still there. */ | |
3e625e2d SH |
186 | return 2; |
187 | } | |
188 | ||
74a3920a | 189 | static int create_partial(struct lxc_container *c) |
3e625e2d | 190 | { |
3e625e2d | 191 | int fd, ret; |
f5cd0252 CB |
192 | size_t len; |
193 | char *path; | |
56474555 | 194 | struct flock lk = {0}; |
93dc5327 | 195 | |
f5cd0252 CB |
196 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
197 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
198 | path = alloca(len); | |
3e625e2d | 199 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
f5cd0252 | 200 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 201 | return -1; |
f5cd0252 | 202 | |
d1bc8d48 | 203 | fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0000); |
f5cd0252 | 204 | if (fd < 0) |
3e625e2d | 205 | return -1; |
f5cd0252 | 206 | |
93dc5327 SH |
207 | lk.l_type = F_WRLCK; |
208 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 209 | |
56474555 | 210 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 211 | if (ret < 0) { |
56474555 CB |
212 | if (errno == EINVAL) { |
213 | ret = flock(fd, LOCK_EX); | |
214 | if (ret == 0) | |
215 | return fd; | |
216 | } | |
217 | ||
f5cd0252 | 218 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 219 | close(fd); |
3e625e2d SH |
220 | return -1; |
221 | } | |
3e625e2d SH |
222 | |
223 | return fd; | |
224 | } | |
225 | ||
74a3920a | 226 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 227 | { |
3e625e2d | 228 | int ret; |
a3740e80 CB |
229 | size_t len; |
230 | char *path; | |
3e625e2d SH |
231 | |
232 | close(fd); | |
a73846d8 | 233 | |
a3740e80 CB |
234 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
235 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
236 | path = alloca(len); | |
3e625e2d | 237 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
a3740e80 | 238 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 239 | return; |
a3740e80 CB |
240 | |
241 | ret = unlink(path); | |
242 | if (ret < 0) | |
243 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
244 | } |
245 | ||
72d0e1cb | 246 | /* LOCKING |
3bc449ed SH |
247 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
248 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
249 | * container configuration file. | |
250 | * The container_disk_lock also takes the container_mem_lock. | |
251 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
252 | * NOTHING mutexes two independent programs with their own struct |
253 | * lxc_container for the same c->name, between API calls. For instance, | |
254 | * c->config_read(); c->start(); Between those calls, data on disk | |
255 | * could change (which shouldn't bother the caller unless for instance | |
256 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
257 | * Two such updaters could race. The callers should therefore check their | |
258 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
259 | * due to hung callers. So I prefer to keep the locks only within our own | |
260 | * functions, not across functions. | |
261 | * | |
3bc449ed | 262 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
263 | * c->numthreads (under privlock) before forking. When deleting, |
264 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
265 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
266 | */ | |
72d0e1cb SG |
267 | static void lxc_container_free(struct lxc_container *c) |
268 | { | |
269 | if (!c) | |
270 | return; | |
271 | ||
f10fad2f ME |
272 | free(c->configfile); |
273 | c->configfile = NULL; | |
70849dc2 | 274 | |
f10fad2f ME |
275 | free(c->error_string); |
276 | c->error_string = NULL; | |
70849dc2 | 277 | |
d95db067 | 278 | if (c->slock) { |
df271a59 | 279 | lxc_putlock(c->slock); |
d95db067 DE |
280 | c->slock = NULL; |
281 | } | |
70849dc2 | 282 | |
72d0e1cb | 283 | if (c->privlock) { |
df271a59 | 284 | lxc_putlock(c->privlock); |
72d0e1cb SG |
285 | c->privlock = NULL; |
286 | } | |
70849dc2 | 287 | |
f10fad2f ME |
288 | free(c->name); |
289 | c->name = NULL; | |
70849dc2 | 290 | |
d95db067 DE |
291 | if (c->lxc_conf) { |
292 | lxc_conf_free(c->lxc_conf); | |
293 | c->lxc_conf = NULL; | |
294 | } | |
70849dc2 | 295 | |
f10fad2f ME |
296 | free(c->config_path); |
297 | c->config_path = NULL; | |
72cf75fa | 298 | |
72d0e1cb SG |
299 | free(c); |
300 | } | |
301 | ||
045552aa CB |
302 | /* Consider the following case: |
303 | * | |
304 | * |====================================================================| | |
305 | * | freer | racing get()er | | |
306 | * |====================================================================| | |
307 | * | lxc_container_put() | lxc_container_get() | | |
308 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
309 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
310 | * | \ lxcunlock() | \ | | |
311 | * | \ lxc_container_free() | \ lxclock() returns | | |
312 | * | | \ c->numthreads < 1 -> return 0 | | |
313 | * | \ \ (free stuff) | | | |
314 | * | \ \ sem_destroy(privlock) | | | |
315 | * |_______________________________|____________________________________| | |
316 | * | |
43d1aa34 SH |
317 | * When the get()er checks numthreads the first time, one of the following |
318 | * is true: | |
319 | * 1. freer has set numthreads = 0. get() returns 0 | |
320 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
321 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
322 | * numthreads is 0 and exit without touching lxclock again.. | |
323 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
324 | * will see --numthreads = 1 and not call lxc_container_free(). | |
325 | */ | |
326 | ||
72d0e1cb SG |
327 | int lxc_container_get(struct lxc_container *c) |
328 | { | |
329 | if (!c) | |
330 | return 0; | |
331 | ||
1a0e70ac CB |
332 | /* If someone else has already started freeing the container, don't try |
333 | * to take the lock, which may be invalid. | |
334 | */ | |
43d1aa34 SH |
335 | if (c->numthreads < 1) |
336 | return 0; | |
337 | ||
5cee8c50 | 338 | if (container_mem_lock(c)) |
72d0e1cb | 339 | return 0; |
1a0e70ac CB |
340 | |
341 | /* Bail without trying to unlock, bc the privlock is now probably in | |
342 | * freed memory. | |
343 | */ | |
344 | if (c->numthreads < 1) | |
72d0e1cb | 345 | return 0; |
1a0e70ac | 346 | |
72d0e1cb | 347 | c->numthreads++; |
5cee8c50 | 348 | container_mem_unlock(c); |
045552aa | 349 | |
72d0e1cb SG |
350 | return 1; |
351 | } | |
352 | ||
353 | int lxc_container_put(struct lxc_container *c) | |
354 | { | |
355 | if (!c) | |
356 | return -1; | |
045552aa | 357 | |
5cee8c50 | 358 | if (container_mem_lock(c)) |
72d0e1cb | 359 | return -1; |
045552aa | 360 | |
44619b6c CB |
361 | c->numthreads--; |
362 | ||
363 | if (c->numthreads < 1) { | |
5cee8c50 | 364 | container_mem_unlock(c); |
72d0e1cb SG |
365 | lxc_container_free(c); |
366 | return 1; | |
367 | } | |
045552aa | 368 | |
5cee8c50 | 369 | container_mem_unlock(c); |
72d0e1cb SG |
370 | return 0; |
371 | } | |
372 | ||
858377e4 | 373 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 374 | { |
428ad142 | 375 | int statret; |
72d0e1cb SG |
376 | struct stat statbuf; |
377 | bool ret = false; | |
72d0e1cb SG |
378 | |
379 | if (!c) | |
380 | return false; | |
381 | ||
5cee8c50 | 382 | if (container_mem_lock(c)) |
72d0e1cb | 383 | return false; |
428ad142 | 384 | |
72d0e1cb | 385 | if (!c->configfile) |
428ad142 CB |
386 | goto on_error; |
387 | ||
72d0e1cb SG |
388 | statret = stat(c->configfile, &statbuf); |
389 | if (statret != 0) | |
428ad142 CB |
390 | goto on_error; |
391 | ||
72d0e1cb SG |
392 | ret = true; |
393 | ||
428ad142 | 394 | on_error: |
5cee8c50 | 395 | container_mem_unlock(c); |
72d0e1cb SG |
396 | return ret; |
397 | } | |
398 | ||
858377e4 SH |
399 | #define WRAP_API(rettype, fnname) \ |
400 | static rettype fnname(struct lxc_container *c) \ | |
401 | { \ | |
402 | rettype ret; \ | |
8164f0e2 TA |
403 | bool reset_config = false; \ |
404 | \ | |
405 | if (!current_config && c && c->lxc_conf) { \ | |
406 | current_config = c->lxc_conf; \ | |
407 | reset_config = true; \ | |
408 | } \ | |
409 | \ | |
858377e4 | 410 | ret = do_##fnname(c); \ |
8164f0e2 TA |
411 | if (reset_config) \ |
412 | current_config = NULL; \ | |
413 | \ | |
858377e4 SH |
414 | return ret; \ |
415 | } | |
416 | ||
417 | #define WRAP_API_1(rettype, fnname, t1) \ | |
418 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
419 | { \ | |
420 | rettype ret; \ | |
8164f0e2 TA |
421 | bool reset_config = false; \ |
422 | \ | |
423 | if (!current_config && c && c->lxc_conf) { \ | |
424 | current_config = c->lxc_conf; \ | |
425 | reset_config = true; \ | |
426 | } \ | |
427 | \ | |
858377e4 | 428 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
429 | if (reset_config) \ |
430 | current_config = NULL; \ | |
431 | \ | |
858377e4 SH |
432 | return ret; \ |
433 | } | |
434 | ||
435 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
436 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
437 | { \ | |
438 | rettype ret; \ | |
8164f0e2 TA |
439 | bool reset_config = false; \ |
440 | \ | |
441 | if (!current_config && c && c->lxc_conf) { \ | |
442 | current_config = c->lxc_conf; \ | |
443 | reset_config = true; \ | |
444 | } \ | |
445 | \ | |
858377e4 | 446 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
447 | if (reset_config) \ |
448 | current_config = NULL; \ | |
449 | \ | |
858377e4 SH |
450 | return ret; \ |
451 | } | |
452 | ||
453 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
454 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
455 | { \ | |
456 | rettype ret; \ | |
8164f0e2 TA |
457 | bool reset_config = false; \ |
458 | \ | |
459 | if (!current_config && c && c->lxc_conf) { \ | |
460 | current_config = c->lxc_conf; \ | |
461 | reset_config = true; \ | |
462 | } \ | |
463 | \ | |
858377e4 | 464 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
465 | if (reset_config) \ |
466 | current_config = NULL; \ | |
467 | \ | |
858377e4 SH |
468 | return ret; \ |
469 | } | |
470 | ||
29df56cd LT |
471 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
472 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
473 | t4 a4, t5 a5, t6 a6) \ | |
474 | { \ | |
475 | rettype ret; \ | |
476 | bool reset_config = false; \ | |
477 | \ | |
478 | if (!current_config && c && c->lxc_conf) { \ | |
479 | current_config = c->lxc_conf; \ | |
480 | reset_config = true; \ | |
481 | } \ | |
482 | \ | |
483 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
484 | if (reset_config) \ | |
485 | current_config = NULL; \ | |
486 | \ | |
487 | return ret; \ | |
488 | } | |
489 | ||
858377e4 SH |
490 | WRAP_API(bool, lxcapi_is_defined) |
491 | ||
492 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 493 | { |
72d0e1cb SG |
494 | lxc_state_t s; |
495 | ||
496 | if (!c) | |
497 | return NULL; | |
b547d79f | 498 | |
13f5be62 | 499 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 500 | return lxc_state2str(s); |
72d0e1cb SG |
501 | } |
502 | ||
858377e4 SH |
503 | WRAP_API(const char *, lxcapi_state) |
504 | ||
39dc698c | 505 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
506 | { |
507 | lxc_state_t s; | |
5bddcb62 | 508 | |
13f5be62 | 509 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
510 | return (s == STOPPED); |
511 | } | |
512 | ||
858377e4 | 513 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 514 | { |
72d0e1cb SG |
515 | if (!c) |
516 | return false; | |
1b61062f | 517 | |
9e630418 | 518 | return !is_stopped(c); |
72d0e1cb SG |
519 | } |
520 | ||
858377e4 SH |
521 | WRAP_API(bool, lxcapi_is_running) |
522 | ||
523 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb SG |
524 | { |
525 | int ret; | |
8787b387 | 526 | |
72d0e1cb SG |
527 | if (!c) |
528 | return false; | |
529 | ||
5a087e05 | 530 | ret = lxc_freeze(c->lxc_conf, c->name, c->config_path); |
5df46fad | 531 | if (ret < 0) |
72d0e1cb | 532 | return false; |
8787b387 | 533 | |
72d0e1cb SG |
534 | return true; |
535 | } | |
536 | ||
858377e4 SH |
537 | WRAP_API(bool, lxcapi_freeze) |
538 | ||
539 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb SG |
540 | { |
541 | int ret; | |
8e59e0ba | 542 | |
72d0e1cb SG |
543 | if (!c) |
544 | return false; | |
545 | ||
5a087e05 | 546 | ret = lxc_unfreeze(c->lxc_conf, c->name, c->config_path); |
e8989473 | 547 | if (ret < 0) |
72d0e1cb | 548 | return false; |
8e59e0ba | 549 | |
72d0e1cb SG |
550 | return true; |
551 | } | |
552 | ||
858377e4 SH |
553 | WRAP_API(bool, lxcapi_unfreeze) |
554 | ||
555 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 556 | { |
0115f8fd DE |
557 | if (!c) |
558 | return -1; | |
559 | ||
c86e2584 | 560 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
561 | } |
562 | ||
858377e4 SH |
563 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
564 | ||
b5159817 DE |
565 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
566 | int stdoutfd, int stderrfd, int escape) | |
567 | { | |
858377e4 SH |
568 | int ret; |
569 | ||
570 | if (!c) | |
571 | return -1; | |
572 | ||
573 | current_config = c->lxc_conf; | |
574 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
575 | current_config = NULL; | |
49cfedb3 | 576 | |
858377e4 | 577 | return ret; |
b5159817 DE |
578 | } |
579 | ||
191d43cc CB |
580 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
581 | { | |
582 | int ret; | |
583 | ||
5106ecd0 | 584 | if (!c) |
585 | return -EINVAL; | |
586 | ||
191d43cc CB |
587 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); |
588 | if (ret < 0) { | |
589 | if (ret == -ENODATA) | |
63b74cda | 590 | NOTICE("The console log is empty"); |
191d43cc | 591 | else if (ret == -EFAULT) |
63b74cda CB |
592 | NOTICE("The container does not keep a console log"); |
593 | else if (ret == -ENOENT) | |
594 | NOTICE("The container does not keep a console log file"); | |
595 | else if (ret == -EIO) | |
596 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 597 | else |
63b74cda | 598 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
599 | } |
600 | ||
601 | return ret; | |
602 | } | |
603 | ||
604 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
605 | ||
858377e4 | 606 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 607 | { |
72d0e1cb SG |
608 | if (!c) |
609 | return -1; | |
610 | ||
5cee8c50 | 611 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
612 | } |
613 | ||
858377e4 SH |
614 | WRAP_API(pid_t, lxcapi_init_pid) |
615 | ||
12a50cc6 | 616 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
617 | { |
618 | if (!c->lxc_conf) | |
619 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 620 | |
6b0d5538 SH |
621 | if (!c->lxc_conf) |
622 | return false; | |
e3246ab9 | 623 | |
d08779d4 SH |
624 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
625 | return false; | |
e3246ab9 | 626 | |
c7b17051 | 627 | c->lxc_conf->name = c->name; |
d08779d4 | 628 | return true; |
8eb5694b SH |
629 | } |
630 | ||
858377e4 | 631 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 632 | { |
39dc698c | 633 | int lret; |
12a50cc6 | 634 | const char *fname; |
d03ab308 CB |
635 | bool need_disklock = false, ret = false; |
636 | ||
72d0e1cb SG |
637 | if (!c) |
638 | return false; | |
639 | ||
640 | fname = c->configfile; | |
a73846d8 | 641 | |
72d0e1cb SG |
642 | if (alt_file) |
643 | fname = alt_file; | |
a73846d8 | 644 | |
72d0e1cb SG |
645 | if (!fname) |
646 | return false; | |
d03ab308 CB |
647 | |
648 | /* If we're reading something other than the container's config, we only | |
649 | * need to lock the in-memory container. If loading the container's | |
650 | * config file, take the disk lock. | |
39dc698c SH |
651 | */ |
652 | if (strcmp(fname, c->configfile) == 0) | |
653 | need_disklock = true; | |
654 | ||
655 | if (need_disklock) | |
656 | lret = container_disk_lock(c); | |
657 | else | |
658 | lret = container_mem_lock(c); | |
659 | if (lret) | |
72d0e1cb | 660 | return false; |
39dc698c | 661 | |
8eb5694b | 662 | ret = load_config_locked(c, fname); |
39dc698c SH |
663 | |
664 | if (need_disklock) | |
665 | container_disk_unlock(c); | |
666 | else | |
667 | container_mem_unlock(c); | |
d03ab308 | 668 | |
72d0e1cb SG |
669 | return ret; |
670 | } | |
671 | ||
858377e4 SH |
672 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
673 | ||
674 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 675 | { |
497a2995 | 676 | if (!c || !c->lxc_conf) |
540f932a | 677 | return false; |
fb5999f6 CB |
678 | |
679 | if (container_mem_lock(c)) | |
540f932a | 680 | return false; |
fb5999f6 | 681 | |
a2739df5 | 682 | c->daemonize = state; |
d630991d | 683 | |
3bc449ed | 684 | container_mem_unlock(c); |
fb5999f6 | 685 | |
540f932a | 686 | return true; |
72d0e1cb SG |
687 | } |
688 | ||
858377e4 SH |
689 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
690 | ||
691 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
692 | { |
693 | if (!c || !c->lxc_conf) | |
49badbbe | 694 | return false; |
871ed23b CB |
695 | |
696 | if (container_mem_lock(c)) | |
49badbbe | 697 | return false; |
871ed23b | 698 | |
540f932a | 699 | c->lxc_conf->close_all_fds = state; |
d630991d | 700 | |
130a1888 | 701 | container_mem_unlock(c); |
871ed23b | 702 | |
49badbbe | 703 | return true; |
130a1888 ÇO |
704 | } |
705 | ||
858377e4 SH |
706 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
707 | ||
e202dfb8 CB |
708 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
709 | int timeout) | |
7a44c8b4 SG |
710 | { |
711 | int ret; | |
712 | ||
713 | if (!c) | |
714 | return false; | |
715 | ||
67e571de | 716 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
717 | return ret == 0; |
718 | } | |
719 | ||
858377e4 | 720 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 721 | |
2d834aa8 SH |
722 | static bool am_single_threaded(void) |
723 | { | |
2d834aa8 | 724 | DIR *dir; |
d630991d | 725 | struct dirent *direntp; |
6b0297e3 | 726 | int count = 0; |
2d834aa8 | 727 | |
2d834aa8 | 728 | dir = opendir("/proc/self/task"); |
6b0297e3 | 729 | if (!dir) |
2d834aa8 | 730 | return false; |
2d834aa8 | 731 | |
74f96976 | 732 | while ((direntp = readdir(dir))) { |
d630991d | 733 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
734 | continue; |
735 | ||
d630991d | 736 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 737 | continue; |
6b0297e3 | 738 | |
d630991d CB |
739 | count++; |
740 | if (count > 1) | |
2d834aa8 SH |
741 | break; |
742 | } | |
2d834aa8 | 743 | closedir(dir); |
6b0297e3 | 744 | |
2d834aa8 SH |
745 | return count == 1; |
746 | } | |
747 | ||
fd51a89b SH |
748 | static void push_arg(char ***argp, char *arg, int *nargs) |
749 | { | |
fd51a89b | 750 | char *copy; |
1452d3fe | 751 | char **argv; |
fd51a89b | 752 | |
d630991d | 753 | copy = must_copy_string(arg); |
1452d3fe | 754 | |
fd51a89b SH |
755 | do { |
756 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
757 | } while (!argv); | |
1452d3fe | 758 | |
fd51a89b SH |
759 | *argp = argv; |
760 | argv[*nargs] = copy; | |
761 | (*nargs)++; | |
762 | argv[*nargs] = NULL; | |
763 | } | |
764 | ||
765 | static char **split_init_cmd(const char *incmd) | |
766 | { | |
9de31d5a | 767 | size_t len, retlen; |
75bd13ab | 768 | char *copy, *p; |
fd51a89b | 769 | char **argv; |
75bd13ab | 770 | int nargs = 0; |
fd51a89b SH |
771 | |
772 | if (!incmd) | |
773 | return NULL; | |
774 | ||
775 | len = strlen(incmd) + 1; | |
776 | copy = alloca(len); | |
9de31d5a | 777 | retlen = strlcpy(copy, incmd, len); |
a73846d8 | 778 | if (retlen >= len) |
9de31d5a | 779 | return NULL; |
fd51a89b SH |
780 | |
781 | do { | |
782 | argv = malloc(sizeof(char *)); | |
783 | } while (!argv); | |
75bd13ab | 784 | |
fd51a89b | 785 | argv[0] = NULL; |
3c1f04cd | 786 | lxc_iterate_parts(p, copy, " ") |
fd51a89b SH |
787 | push_arg(&argv, p, &nargs); |
788 | ||
789 | if (nargs == 0) { | |
790 | free(argv); | |
791 | return NULL; | |
792 | } | |
75bd13ab | 793 | |
fd51a89b SH |
794 | return argv; |
795 | } | |
796 | ||
797 | static void free_init_cmd(char **argv) | |
798 | { | |
799 | int i = 0; | |
800 | ||
801 | if (!argv) | |
802 | return; | |
702bf732 | 803 | |
fd51a89b SH |
804 | while (argv[i]) |
805 | free(argv[i++]); | |
702bf732 | 806 | |
fd51a89b SH |
807 | free(argv); |
808 | } | |
809 | ||
5e5576a4 CB |
810 | static int lxc_rcv_status(int state_socket) |
811 | { | |
a73846d8 | 812 | int ret; |
813 | int state = -1; | |
5e5576a4 | 814 | |
ee8377bd | 815 | again: |
a73846d8 | 816 | /* Receive container state. */ |
817 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
818 | if (ret <= 0) { | |
ee8377bd CB |
819 | if (errno != EINTR) |
820 | return -1; | |
a73846d8 | 821 | |
ee8377bd CB |
822 | TRACE("Caught EINTR; retrying"); |
823 | goto again; | |
824 | } | |
5e5576a4 | 825 | |
a73846d8 | 826 | return state; |
5e5576a4 CB |
827 | } |
828 | ||
829 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
830 | { | |
a73846d8 | 831 | int ret, state; |
5e5576a4 | 832 | |
a73846d8 | 833 | /* Close write end of the socket pair. */ |
834 | close(handler->state_socket_pair[1]); | |
835 | handler->state_socket_pair[1] = -1; | |
5e5576a4 | 836 | |
a73846d8 | 837 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 838 | |
a73846d8 | 839 | /* Close read end of the socket pair. */ |
840 | close(handler->state_socket_pair[0]); | |
841 | handler->state_socket_pair[0] = -1; | |
5e5576a4 | 842 | |
a73846d8 | 843 | /* The first child is going to fork() again and then exits. So we reap |
844 | * the first child here. | |
845 | */ | |
01c1b11e CB |
846 | ret = wait_for_pid(pid); |
847 | if (ret < 0) | |
a73846d8 | 848 | DEBUG("Failed waiting on first child %d", pid); |
01c1b11e | 849 | else |
a73846d8 | 850 | DEBUG("First child %d exited", pid); |
5e5576a4 | 851 | |
a73846d8 | 852 | if (state < 0) { |
853 | SYSERROR("Failed to receive the container state"); | |
854 | return false; | |
855 | } | |
5e5576a4 | 856 | |
a73846d8 | 857 | /* If we receive anything else then running we know that the container |
858 | * failed to start. | |
859 | */ | |
860 | if (state != RUNNING) { | |
861 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
862 | lxc_state2str(state)); | |
863 | return false; | |
864 | } | |
5e5576a4 | 865 | |
a73846d8 | 866 | TRACE("Container is in \"RUNNING\" state"); |
867 | return true; | |
5e5576a4 CB |
868 | } |
869 | ||
858377e4 | 870 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
871 | { |
872 | int ret; | |
aa460476 | 873 | struct lxc_handler *handler; |
72d0e1cb | 874 | struct lxc_conf *conf; |
72d0e1cb SG |
875 | char *default_args[] = { |
876 | "/sbin/init", | |
13aad0ae | 877 | NULL, |
72d0e1cb | 878 | }; |
fd51a89b | 879 | char **init_cmd = NULL; |
c1a3e547 | 880 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 881 | |
7cb19d44 | 882 | /* container does exist */ |
72d0e1cb SG |
883 | if (!c) |
884 | return false; | |
120146b9 | 885 | |
7cb19d44 CB |
886 | /* If anything fails before we set error_num, we want an error in there. |
887 | */ | |
120146b9 SG |
888 | c->error_num = 1; |
889 | ||
7cb19d44 | 890 | /* Container has not been setup. */ |
72d0e1cb SG |
891 | if (!c->lxc_conf) |
892 | return false; | |
893 | ||
c47eafec CB |
894 | ret = ongoing_create(c); |
895 | if (ret < 0) { | |
7cb19d44 | 896 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 897 | return false; |
3e625e2d | 898 | } else if (ret == 1) { |
7cb19d44 | 899 | ERROR("Ongoing container creation detected"); |
3e625e2d | 900 | return false; |
c47eafec | 901 | } else if (ret == 2) { |
7cb19d44 | 902 | ERROR("Failed to create container"); |
c47eafec CB |
903 | do_lxcapi_destroy(c); |
904 | return false; | |
3e625e2d SH |
905 | } |
906 | ||
5cee8c50 | 907 | if (container_mem_lock(c)) |
72d0e1cb | 908 | return false; |
d630991d | 909 | |
72d0e1cb | 910 | conf = c->lxc_conf; |
72d0e1cb | 911 | |
aa460476 | 912 | /* initialize handler */ |
9640c6a7 | 913 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 914 | |
dbc9832d | 915 | container_mem_unlock(c); |
aa460476 CB |
916 | if (!handler) |
917 | return false; | |
918 | ||
fa30091b CB |
919 | if (!argv) { |
920 | if (useinit && conf->execute_cmd) | |
921 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
922 | else | |
923 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
924 | } | |
fd51a89b | 925 | |
7cb19d44 | 926 | /* ... otherwise use default_args. */ |
fa30091b | 927 | if (!argv) { |
e1e76423 CB |
928 | if (useinit) { |
929 | ERROR("No valid init detected"); | |
930 | lxc_free_handler(handler); | |
fa30091b | 931 | return false; |
e1e76423 CB |
932 | } |
933 | argv = default_args; | |
fa30091b | 934 | } |
72d0e1cb | 935 | |
7cb19d44 CB |
936 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
937 | * here to protect the on disk container? We don't want to exclude | |
938 | * things like lxc_info while the container is running. | |
939 | */ | |
9640c6a7 | 940 | if (c->daemonize) { |
a6b6ad7b | 941 | bool started; |
0a4be28d | 942 | char title[2048]; |
c47eafec | 943 | pid_t pid; |
71454076 | 944 | |
c47eafec | 945 | pid = fork(); |
f2e07cb6 | 946 | if (pid < 0) { |
c47eafec | 947 | free_init_cmd(init_cmd); |
f2e07cb6 | 948 | lxc_free_handler(handler); |
72d0e1cb | 949 | return false; |
f2e07cb6 | 950 | } |
6eaac303 | 951 | |
7cb19d44 | 952 | /* first parent */ |
6eaac303 QH |
953 | if (pid != 0) { |
954 | /* Set to NULL because we don't want father unlink | |
955 | * the PID file, child will do the free and unlink. | |
956 | */ | |
957 | c->pidfile = NULL; | |
5e5576a4 | 958 | |
7cb19d44 CB |
959 | /* Wait for container to tell us whether it started |
960 | * successfully. | |
961 | */ | |
a6b6ad7b CB |
962 | started = wait_on_daemonized_start(handler, pid); |
963 | ||
964 | free_init_cmd(init_cmd); | |
965 | lxc_free_handler(handler); | |
966 | return started; | |
6eaac303 | 967 | } |
025ed0f3 | 968 | |
7cb19d44 CB |
969 | /* first child */ |
970 | ||
0a4be28d | 971 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
972 | * characters. All that it means is that the proctitle will be |
973 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
bafad468 CB |
974 | */ |
975 | ret = snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); | |
976 | if (ret > 0) { | |
977 | ret = setproctitle(title); | |
978 | if (ret < 0) | |
979 | INFO("Failed to set process title to %s", title); | |
980 | else | |
981 | INFO("Set process title to %s", title); | |
982 | } | |
0a4be28d | 983 | |
7cb19d44 CB |
984 | /* We fork() a second time to be reparented to init. Like |
985 | * POSIX's daemon() function we change to "/" and redirect | |
986 | * std{in,out,err} to /dev/null. | |
987 | */ | |
697fa639 SH |
988 | pid = fork(); |
989 | if (pid < 0) { | |
7cb19d44 | 990 | SYSERROR("Failed to fork first child process"); |
d608fbda | 991 | _exit(EXIT_FAILURE); |
697fa639 | 992 | } |
a6b6ad7b | 993 | |
7cb19d44 | 994 | /* second parent */ |
a6b6ad7b CB |
995 | if (pid != 0) { |
996 | free_init_cmd(init_cmd); | |
997 | lxc_free_handler(handler); | |
d608fbda | 998 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
999 | } |
1000 | ||
7cb19d44 CB |
1001 | /* second child */ |
1002 | ||
1003 | /* change to / directory */ | |
1004 | ret = chdir("/"); | |
1005 | if (ret < 0) { | |
1006 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 1007 | _exit(EXIT_FAILURE); |
c278cef2 | 1008 | } |
7cb19d44 | 1009 | |
c1a3e547 CB |
1010 | keepfds[0] = handler->conf->maincmd_fd; |
1011 | keepfds[1] = handler->state_socket_pair[0]; | |
1012 | keepfds[2] = handler->state_socket_pair[1]; | |
1013 | ret = lxc_check_inherited(conf, true, keepfds, | |
1014 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 1015 | if (ret < 0) |
d608fbda | 1016 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1017 | |
1018 | /* redirect std{in,out,err} to /dev/null */ | |
1019 | ret = null_stdfds(); | |
1020 | if (ret < 0) { | |
1021 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1022 | _exit(EXIT_FAILURE); |
69aeabac | 1023 | } |
7cb19d44 CB |
1024 | |
1025 | /* become session leader */ | |
1026 | ret = setsid(); | |
1027 | if (ret < 0) | |
0059379f | 1028 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
bafad468 CB |
1029 | } else if (!am_single_threaded()) { |
1030 | ERROR("Cannot start non-daemonized container when threaded"); | |
1031 | free_init_cmd(init_cmd); | |
1032 | lxc_free_handler(handler); | |
1033 | return false; | |
72d0e1cb SG |
1034 | } |
1035 | ||
bafad468 CB |
1036 | /* We need to write PID file after daemonize, so we always write the |
1037 | * right PID. | |
6eaac303 QH |
1038 | */ |
1039 | if (c->pidfile) { | |
7cea5905 | 1040 | int ret, w; |
b07ea13d | 1041 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
7cea5905 | 1042 | |
b07ea13d | 1043 | w = snprintf(pidstr, sizeof(pidstr), "%d", lxc_raw_getpid()); |
979a0d93 | 1044 | if (w < 0 || (size_t)w >= sizeof(pidstr)) { |
c47eafec | 1045 | free_init_cmd(init_cmd); |
f2e07cb6 | 1046 | lxc_free_handler(handler); |
7cea5905 CB |
1047 | |
1048 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1049 | ||
9640c6a7 | 1050 | if (c->daemonize) |
d608fbda | 1051 | _exit(EXIT_FAILURE); |
7cea5905 | 1052 | |
6eaac303 QH |
1053 | return false; |
1054 | } | |
1055 | ||
7cea5905 CB |
1056 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1057 | if (ret < 0) { | |
c47eafec | 1058 | free_init_cmd(init_cmd); |
f2e07cb6 | 1059 | lxc_free_handler(handler); |
7cea5905 | 1060 | |
bafad468 | 1061 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); |
7cea5905 | 1062 | |
9640c6a7 | 1063 | if (c->daemonize) |
d608fbda | 1064 | _exit(EXIT_FAILURE); |
7cea5905 | 1065 | |
6eaac303 QH |
1066 | return false; |
1067 | } | |
6eaac303 QH |
1068 | } |
1069 | ||
80308d07 | 1070 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1071 | |
a8dfe4e0 WB |
1072 | /* Unshare the mount namespace if requested */ |
1073 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1074 | ret = unshare(CLONE_NEWNS); |
1075 | if (ret < 0) { | |
bafad468 | 1076 | SYSERROR("Failed to unshare mount namespace"); |
f2e07cb6 | 1077 | lxc_free_handler(handler); |
a6b6ad7b | 1078 | ret = 1; |
7cb19d44 | 1079 | goto on_error; |
a8dfe4e0 | 1080 | } |
7cb19d44 CB |
1081 | |
1082 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1083 | if (ret < 0) { | |
a8dfe4e0 | 1084 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1085 | lxc_free_handler(handler); |
a6b6ad7b | 1086 | ret = 1; |
7cb19d44 | 1087 | goto on_error; |
a8dfe4e0 WB |
1088 | } |
1089 | } | |
1090 | ||
8bee8851 | 1091 | reboot: |
80308d07 | 1092 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1093 | /* initialize handler */ |
9640c6a7 | 1094 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1095 | if (!handler) { |
1096 | ret = 1; | |
7cb19d44 | 1097 | goto on_error; |
a6b6ad7b | 1098 | } |
aa460476 CB |
1099 | } |
1100 | ||
c1a3e547 CB |
1101 | keepfds[0] = handler->conf->maincmd_fd; |
1102 | keepfds[1] = handler->state_socket_pair[0]; | |
1103 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1104 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1105 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1106 | if (ret < 0) { |
f2e07cb6 | 1107 | lxc_free_handler(handler); |
d2cf4c37 | 1108 | ret = 1; |
7cb19d44 | 1109 | goto on_error; |
d2cf4c37 SH |
1110 | } |
1111 | ||
9605460f | 1112 | if (useinit) |
9640c6a7 CB |
1113 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1114 | c->daemonize, &c->error_num); | |
9605460f | 1115 | else |
9640c6a7 CB |
1116 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1117 | c->daemonize, &c->error_num); | |
72d0e1cb | 1118 | |
80308d07 | 1119 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1120 | INFO("Container requested reboot"); |
80308d07 | 1121 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1122 | goto reboot; |
1123 | } | |
1124 | ||
7cb19d44 | 1125 | on_error: |
487d8008 QH |
1126 | if (c->pidfile) { |
1127 | unlink(c->pidfile); | |
1128 | free(c->pidfile); | |
1129 | c->pidfile = NULL; | |
1130 | } | |
fd51a89b SH |
1131 | free_init_cmd(init_cmd); |
1132 | ||
9640c6a7 | 1133 | if (c->daemonize && ret != 0) |
d608fbda | 1134 | _exit(EXIT_FAILURE); |
9640c6a7 | 1135 | else if (c->daemonize) |
d608fbda | 1136 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1137 | |
1138 | if (ret != 0) | |
1139 | return false; | |
1140 | ||
1141 | return true; | |
72d0e1cb SG |
1142 | } |
1143 | ||
0c14779f CB |
1144 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1145 | char *const argv[]) | |
858377e4 SH |
1146 | { |
1147 | bool ret; | |
0c14779f | 1148 | |
858377e4 SH |
1149 | current_config = c ? c->lxc_conf : NULL; |
1150 | ret = do_lxcapi_start(c, useinit, argv); | |
1151 | current_config = NULL; | |
0c14779f | 1152 | |
858377e4 SH |
1153 | return ret; |
1154 | } | |
1155 | ||
9f52e331 | 1156 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1157 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1158 | { | |
1159 | va_list ap; | |
a0e93eeb | 1160 | char **inargs = NULL; |
72d0e1cb SG |
1161 | bool bret = false; |
1162 | ||
1163 | /* container exists */ | |
1164 | if (!c) | |
1165 | return false; | |
1166 | ||
858377e4 SH |
1167 | current_config = c->lxc_conf; |
1168 | ||
72d0e1cb | 1169 | va_start(ap, useinit); |
a0e93eeb | 1170 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1171 | va_end(ap); |
9f52e331 CB |
1172 | if (!inargs) |
1173 | goto on_error; | |
72d0e1cb | 1174 | |
a0e93eeb | 1175 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1176 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1177 | |
9f52e331 | 1178 | on_error: |
72d0e1cb | 1179 | if (inargs) { |
4e03ae57 | 1180 | char **arg; |
a73846d8 | 1181 | |
4e03ae57 DE |
1182 | for (arg = inargs; *arg; arg++) |
1183 | free(*arg); | |
72d0e1cb SG |
1184 | free(inargs); |
1185 | } | |
1186 | ||
858377e4 | 1187 | current_config = NULL; |
9f52e331 | 1188 | |
72d0e1cb SG |
1189 | return bret; |
1190 | } | |
1191 | ||
858377e4 | 1192 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1193 | { |
1194 | int ret; | |
1195 | ||
1196 | if (!c) | |
1197 | return false; | |
1198 | ||
ef6e34ee | 1199 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1200 | |
d775f21b | 1201 | return ret == 0; |
72d0e1cb SG |
1202 | } |
1203 | ||
858377e4 SH |
1204 | WRAP_API(bool, lxcapi_stop) |
1205 | ||
d5752559 SH |
1206 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1207 | { | |
78d44e5a CB |
1208 | int lasterr; |
1209 | size_t len; | |
1210 | char *p; | |
1211 | int ret = -1; | |
1212 | ||
d5752559 SH |
1213 | mode_t mask = umask(0002); |
1214 | ret = mkdir(path, 0770); | |
1215 | lasterr = errno; | |
1216 | umask(mask); | |
1217 | errno = lasterr; | |
1218 | if (ret) { | |
78d44e5a | 1219 | if (errno != EEXIST) |
d5752559 | 1220 | return -1; |
78d44e5a CB |
1221 | |
1222 | ret = 0; | |
d5752559 | 1223 | } |
78d44e5a CB |
1224 | |
1225 | len = strlen(path); | |
1226 | p = alloca(len + 1); | |
cbb9c7c7 DJ |
1227 | (void)strlcpy(p, path, len + 1); |
1228 | ||
78d44e5a CB |
1229 | if (!lxc_list_empty(&conf->id_map)) { |
1230 | ret = chown_mapped_root(p, conf); | |
1231 | if (ret < 0) | |
1232 | ret = -1; | |
d5752559 | 1233 | } |
78d44e5a | 1234 | |
d5752559 SH |
1235 | return ret; |
1236 | } | |
1237 | ||
dfa7eaeb | 1238 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1239 | static bool create_container_dir(struct lxc_container *c) |
1240 | { | |
dfa7eaeb CB |
1241 | int ret; |
1242 | size_t len; | |
72d0e1cb | 1243 | char *s; |
72d0e1cb | 1244 | |
2a59a681 | 1245 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1246 | s = malloc(len); |
1247 | if (!s) | |
1248 | return false; | |
dfa7eaeb | 1249 | |
2a59a681 | 1250 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1251 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1252 | free(s); |
1253 | return false; | |
1254 | } | |
dfa7eaeb | 1255 | |
d5752559 | 1256 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1257 | free(s); |
dfa7eaeb | 1258 | |
72d0e1cb SG |
1259 | return ret == 0; |
1260 | } | |
1261 | ||
10bc1861 CB |
1262 | /* do_storage_create: thin wrapper around storage_create(). Like |
1263 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1264 | */ |
10bc1861 CB |
1265 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1266 | const char *type, | |
1267 | struct bdev_specs *specs) | |
1897e3bc | 1268 | { |
e9e29a33 | 1269 | int ret; |
1897e3bc | 1270 | size_t len; |
e9e29a33 | 1271 | char *dest; |
10bc1861 | 1272 | struct lxc_storage *bdev; |
1897e3bc | 1273 | |
cd219ae6 | 1274 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1275 | if (c->lxc_conf->rootfs.path && |
1276 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1277 | const char *rpath = c->lxc_conf->rootfs.path; |
1278 | len = strlen(rpath) + 1; | |
cd219ae6 | 1279 | dest = alloca(len); |
cf465fe4 | 1280 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1281 | } else { |
858377e4 | 1282 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 SY |
1283 | len = strlen(c->name) + strlen(lxcpath) + 9; |
1284 | dest = alloca(len); | |
1285 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); | |
1286 | } | |
e9e29a33 | 1287 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1288 | return NULL; |
1289 | ||
10bc1861 | 1290 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1291 | if (!bdev) { |
e9e29a33 | 1292 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1293 | return NULL; |
d44e88c2 SH |
1294 | } |
1295 | ||
7a96a068 | 1296 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1297 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
f7ac4459 CB |
1298 | return NULL; |
1299 | } | |
cf3ef16d | 1300 | |
e9e29a33 CB |
1301 | /* If we are not root, chown the rootfs dir to root in the target user |
1302 | * namespace. | |
f7ac4459 | 1303 | */ |
e9e29a33 CB |
1304 | ret = geteuid(); |
1305 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1306 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1307 | if (ret < 0) { | |
1308 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1309 | suggest_default_idmap(); |
10bc1861 | 1310 | storage_put(bdev); |
cf3ef16d SH |
1311 | return NULL; |
1312 | } | |
1313 | } | |
1314 | ||
1897e3bc SH |
1315 | return bdev; |
1316 | } | |
1317 | ||
96b3cb40 | 1318 | static char *lxcbasename(char *path) |
72d0e1cb | 1319 | { |
47e55887 CB |
1320 | char *p; |
1321 | ||
1322 | p = path + strlen(path) - 1; | |
96b3cb40 SH |
1323 | while (*p != '/' && p > path) |
1324 | p--; | |
47e55887 | 1325 | |
96b3cb40 SH |
1326 | return p; |
1327 | } | |
72d0e1cb | 1328 | |
47e55887 CB |
1329 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1330 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1331 | { |
47e55887 | 1332 | int ret; |
96b3cb40 | 1333 | pid_t pid; |
72d0e1cb | 1334 | |
72d0e1cb | 1335 | if (!tpath) |
96b3cb40 | 1336 | return true; |
72d0e1cb SG |
1337 | |
1338 | pid = fork(); | |
1339 | if (pid < 0) { | |
7e34710e | 1340 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1341 | return false; |
72d0e1cb SG |
1342 | } |
1343 | ||
1a0e70ac | 1344 | if (pid == 0) { /* child */ |
47e55887 CB |
1345 | int i, len; |
1346 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1347 | char **newargv; |
47e55887 CB |
1348 | int nargs = 0; |
1349 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1350 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1351 | uid_t euid; |
72d0e1cb | 1352 | |
47e55887 CB |
1353 | if (need_null_stdfds) { |
1354 | ret = null_stdfds(); | |
1355 | if (ret < 0) | |
1356 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1357 | } |
1897e3bc | 1358 | |
8a388ed4 | 1359 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1360 | if (!bdev) { |
47e55887 | 1361 | ERROR("Failed to initialize storage"); |
7e34710e | 1362 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1363 | } |
1364 | ||
47e55887 CB |
1365 | euid = geteuid(); |
1366 | if (euid == 0) { | |
1367 | ret = unshare(CLONE_NEWNS); | |
1368 | if (ret < 0) { | |
1369 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1370 | _exit(EXIT_FAILURE); |
cf3ef16d | 1371 | } |
47e55887 CB |
1372 | |
1373 | ret = detect_shared_rootfs(); | |
1374 | if (ret == 1) { | |
1375 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1376 | if (ret < 0) { | |
1377 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1378 | ERROR("Continuing..."); |
1379 | } | |
1380 | } | |
1381 | } | |
47e55887 CB |
1382 | |
1383 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1384 | if (euid != 0) { | |
1385 | ERROR("Unprivileged users can only create " | |
1386 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1387 | _exit(EXIT_FAILURE); |
4de2791f | 1388 | } |
241978fa | 1389 | |
47e55887 CB |
1390 | if (strcmp(bdev->type, "overlay") == 0 || |
1391 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1392 | /* If we create an overlay container we need to |
1393 | * rsync the contents into | |
1394 | * <container-path>/<container-name>/rootfs. | |
1395 | * However, the overlay mount function will | |
1396 | * mount will mount | |
1397 | * <container-path>/<container-name>/delta0 | |
1398 | * over | |
1399 | * <container-path>/<container-name>/rootfs | |
1400 | * which means we would rsync the rootfs into | |
1401 | * the delta directory. That doesn't make sense | |
1402 | * since the delta directory only exists to | |
1403 | * record the differences to | |
1404 | * <container-path>/<container-name>/rootfs. So | |
1405 | * let's simply bind-mount here and then rsync | |
1406 | * directly into | |
1407 | * <container-path>/<container-name>/rootfs. | |
1408 | */ | |
1409 | char *src; | |
1410 | ||
1411 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1412 | if (!src) { | |
1413 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1414 | _exit(EXIT_FAILURE); |
241978fa CB |
1415 | } |
1416 | ||
1417 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1418 | if (ret < 0) { | |
1419 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1420 | _exit(EXIT_FAILURE); |
241978fa CB |
1421 | } |
1422 | } else { | |
47e55887 CB |
1423 | ret = bdev->ops->mount(bdev); |
1424 | if (ret < 0) { | |
241978fa | 1425 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1426 | _exit(EXIT_FAILURE); |
241978fa | 1427 | } |
cf3ef16d | 1428 | } |
1a0e70ac | 1429 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1430 | const char *src; |
f10fad2f | 1431 | free(bdev->dest); |
e9705550 CB |
1432 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1433 | bdev->dest = strdup(src); | |
1897e3bc SH |
1434 | } |
1435 | ||
47e55887 CB |
1436 | /* Create our new array, pre-pend the template name and base |
1437 | * args. | |
72d0e1cb SG |
1438 | */ |
1439 | if (argv) | |
a73846d8 | 1440 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1441 | ; |
a73846d8 | 1442 | |
47e55887 CB |
1443 | /* template, path, rootfs and name args */ |
1444 | nargs += 4; | |
cf3ef16d | 1445 | |
72d0e1cb SG |
1446 | newargv = malloc(nargs * sizeof(*newargv)); |
1447 | if (!newargv) | |
7e34710e | 1448 | _exit(EXIT_FAILURE); |
96b3cb40 | 1449 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 1450 | |
47e55887 | 1451 | /* --path */ |
2a59a681 | 1452 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1453 | patharg = malloc(len); |
1454 | if (!patharg) | |
7e34710e | 1455 | _exit(EXIT_FAILURE); |
a73846d8 | 1456 | |
2a59a681 | 1457 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1458 | if (ret < 0 || ret >= len) |
7e34710e | 1459 | _exit(EXIT_FAILURE); |
72d0e1cb | 1460 | newargv[1] = patharg; |
47e55887 CB |
1461 | |
1462 | /* --name */ | |
72d0e1cb SG |
1463 | len = strlen("--name=") + strlen(c->name) + 1; |
1464 | namearg = malloc(len); | |
1465 | if (!namearg) | |
7e34710e | 1466 | _exit(EXIT_FAILURE); |
a73846d8 | 1467 | |
72d0e1cb SG |
1468 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1469 | if (ret < 0 || ret >= len) | |
7e34710e | 1470 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1471 | newargv[2] = namearg; |
1472 | ||
47e55887 | 1473 | /* --rootfs */ |
1897e3bc SH |
1474 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1475 | rootfsarg = malloc(len); | |
1476 | if (!rootfsarg) | |
7e34710e | 1477 | _exit(EXIT_FAILURE); |
a73846d8 | 1478 | |
1897e3bc SH |
1479 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1480 | if (ret < 0 || ret >= len) | |
7e34710e | 1481 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1482 | newargv[3] = rootfsarg; |
1483 | ||
72d0e1cb SG |
1484 | /* add passed-in args */ |
1485 | if (argv) | |
1897e3bc | 1486 | for (i = 4; i < nargs; i++) |
47e55887 | 1487 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1488 | |
1489 | /* add trailing NULL */ | |
1490 | nargs++; | |
1491 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1492 | if (!newargv) | |
7e34710e | 1493 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1494 | newargv[nargs - 1] = NULL; |
1495 | ||
47e55887 CB |
1496 | /* If we're running the template in a mapped userns, then we |
1497 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1498 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1499 | * the mapped uid for our geteuid() | |
cf3ef16d | 1500 | */ |
0e6e3a41 | 1501 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1502 | int extraargs, hostuid_mapped, hostgid_mapped; |
1503 | char **n2; | |
1504 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1505 | struct lxc_list *it; |
1506 | struct id_map *map; | |
47e55887 | 1507 | int n2args = 1; |
cf3ef16d | 1508 | |
47e55887 CB |
1509 | n2 = malloc(n2args * sizeof(*n2)); |
1510 | if (!n2) | |
7e34710e | 1511 | _exit(EXIT_FAILURE); |
47e55887 | 1512 | |
cf3ef16d SH |
1513 | newargv[0] = tpath; |
1514 | tpath = "lxc-usernsexec"; | |
1515 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1516 | |
cf3ef16d SH |
1517 | lxc_list_for_each(it, &conf->id_map) { |
1518 | map = it->elem; | |
1519 | n2args += 2; | |
57d116ab | 1520 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1521 | if (!n2) |
7e34710e | 1522 | _exit(EXIT_FAILURE); |
47e55887 CB |
1523 | |
1524 | n2[n2args - 2] = "-m"; | |
1525 | n2[n2args - 1] = malloc(200); | |
1526 | if (!n2[n2args - 1]) | |
7e34710e | 1527 | _exit(EXIT_FAILURE); |
47e55887 CB |
1528 | |
1529 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1530 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1531 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1532 | if (ret < 0 || ret >= 200) |
7e34710e | 1533 | _exit(EXIT_FAILURE); |
cf3ef16d | 1534 | } |
47e55887 CB |
1535 | |
1536 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1537 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1538 | |
57d116ab | 1539 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1540 | if (!n2) |
7e34710e | 1541 | _exit(EXIT_FAILURE); |
47e55887 CB |
1542 | |
1543 | if (hostuid_mapped < 0) { | |
1544 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1545 | n2[n2args++] = "-m"; |
47e55887 CB |
1546 | if (hostuid_mapped < 0) { |
1547 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1548 | _exit(EXIT_FAILURE); |
cf3ef16d | 1549 | } |
47e55887 | 1550 | |
cf3ef16d | 1551 | n2[n2args++] = malloc(200); |
47e55887 | 1552 | if (!n2[n2args - 1]) { |
cf3ef16d | 1553 | SYSERROR("out of memory"); |
7e34710e | 1554 | _exit(EXIT_FAILURE); |
cf3ef16d | 1555 | } |
a73846d8 | 1556 | |
47e55887 CB |
1557 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1558 | hostuid_mapped, geteuid()); | |
1559 | if (ret < 0 || ret >= 200) | |
7e34710e | 1560 | _exit(EXIT_FAILURE); |
cf3ef16d | 1561 | } |
47e55887 CB |
1562 | |
1563 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1564 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1565 | |
2133f58c SH |
1566 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1567 | if (!n2) | |
7e34710e | 1568 | _exit(EXIT_FAILURE); |
47e55887 | 1569 | |
2133f58c | 1570 | if (hostgid_mapped < 0) { |
339efad9 | 1571 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1572 | n2[n2args++] = "-m"; |
1573 | if (hostgid_mapped < 0) { | |
47e55887 | 1574 | ERROR("Failed to find free gid to map"); |
7e34710e | 1575 | _exit(EXIT_FAILURE); |
2133f58c | 1576 | } |
47e55887 | 1577 | |
2133f58c | 1578 | n2[n2args++] = malloc(200); |
47e55887 | 1579 | if (!n2[n2args - 1]) { |
2133f58c | 1580 | SYSERROR("out of memory"); |
7e34710e | 1581 | _exit(EXIT_FAILURE); |
2133f58c | 1582 | } |
47e55887 CB |
1583 | |
1584 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1585 | hostgid_mapped, getegid()); | |
1586 | if (ret < 0 || ret >= 200) | |
7e34710e | 1587 | _exit(EXIT_FAILURE); |
2133f58c | 1588 | } |
a73846d8 | 1589 | |
cf3ef16d | 1590 | n2[n2args++] = "--"; |
a73846d8 | 1591 | |
cf3ef16d SH |
1592 | for (i = 0; i < nargs; i++) |
1593 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1594 | n2args += nargs; |
47e55887 CB |
1595 | |
1596 | /* Finally add "--mapped-uid $uid" to tell template what | |
1597 | * to chown cached images to. | |
1a0e70ac | 1598 | */ |
2133f58c | 1599 | n2args += 4; |
57d116ab | 1600 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1601 | if (!n2) |
7e34710e | 1602 | _exit(EXIT_FAILURE); |
47e55887 | 1603 | |
1a0e70ac | 1604 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1605 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1606 | |
1607 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1608 | if (ret < 0 || ret >= 20) { | |
1609 | free(newargv); | |
1610 | free(n2); | |
1611 | _exit(EXIT_FAILURE); | |
1612 | } | |
1613 | ||
47e55887 CB |
1614 | n2[n2args - 4] = txtuid; |
1615 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1616 | |
1f080b1d CB |
1617 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1618 | if (ret < 0 || ret >= 20) { | |
1619 | free(newargv); | |
1620 | free(n2); | |
1621 | _exit(EXIT_FAILURE); | |
1622 | } | |
4250ef64 | 1623 | |
47e55887 CB |
1624 | n2[n2args - 2] = txtgid; |
1625 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1626 | free(newargv); |
1627 | newargv = n2; | |
1628 | } | |
47e55887 | 1629 | |
cf3ef16d | 1630 | execvp(tpath, newargv); |
e9705550 | 1631 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1632 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1633 | } |
1634 | ||
47e55887 CB |
1635 | ret = wait_for_pid(pid); |
1636 | if (ret != 0) { | |
1637 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1638 | return false; |
1639 | } | |
1640 | ||
1641 | return true; | |
1642 | } | |
1643 | ||
74a3920a | 1644 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1645 | { |
1fd9bd50 | 1646 | long flen; |
630ac7c6 | 1647 | size_t len; |
b4569e93 | 1648 | char *contents; |
3ce74686 | 1649 | FILE *f; |
025ed0f3 | 1650 | int ret = -1; |
52026772 | 1651 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1652 | int i; |
3ce74686 | 1653 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1654 | char *tpath; |
52026772 | 1655 | #endif |
3ce74686 | 1656 | |
025ed0f3 | 1657 | f = fopen(path, "r"); |
025ed0f3 | 1658 | if (f == NULL) |
3ce74686 | 1659 | return false; |
025ed0f3 | 1660 | |
630ac7c6 CB |
1661 | ret = fseek(f, 0, SEEK_END); |
1662 | if (ret < 0) | |
025ed0f3 | 1663 | goto out_error; |
630ac7c6 CB |
1664 | |
1665 | ret = -1; | |
1666 | flen = ftell(f); | |
1667 | if (flen < 0) | |
025ed0f3 | 1668 | goto out_error; |
630ac7c6 CB |
1669 | |
1670 | ret = fseek(f, 0, SEEK_SET); | |
1671 | if (ret < 0) | |
025ed0f3 | 1672 | goto out_error; |
630ac7c6 CB |
1673 | |
1674 | ret = fseek(f, 0, SEEK_SET); | |
1675 | if (ret < 0) | |
1676 | goto out_error; | |
1677 | ||
1678 | ret = -1; | |
1679 | contents = malloc(flen + 1); | |
1680 | if (!contents) | |
025ed0f3 | 1681 | goto out_error; |
630ac7c6 CB |
1682 | |
1683 | len = fread(contents, 1, flen, f); | |
1684 | if (len != flen) | |
025ed0f3 SH |
1685 | goto out_free_contents; |
1686 | ||
3ce74686 | 1687 | contents[flen] = '\0'; |
a73846d8 | 1688 | |
025ed0f3 | 1689 | ret = fclose(f); |
025ed0f3 SH |
1690 | f = NULL; |
1691 | if (ret < 0) | |
1692 | goto out_free_contents; | |
3ce74686 | 1693 | |
b4569e93 | 1694 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1695 | tpath = get_template_path(t); |
85db5535 | 1696 | if (!tpath) { |
630ac7c6 | 1697 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1698 | goto out_free_contents; |
3ce74686 SH |
1699 | } |
1700 | ||
85db5535 DE |
1701 | ret = sha1sum_file(tpath, md_value); |
1702 | if (ret < 0) { | |
630ac7c6 | 1703 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1704 | free(tpath); |
85db5535 | 1705 | goto out_free_contents; |
3ce74686 | 1706 | } |
cef701ed | 1707 | free(tpath); |
3ce74686 SH |
1708 | #endif |
1709 | ||
025ed0f3 | 1710 | f = fopen(path, "w"); |
025ed0f3 | 1711 | if (f == NULL) { |
630ac7c6 | 1712 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1713 | free(contents); |
1714 | return false; | |
1715 | } | |
630ac7c6 | 1716 | |
3ce74686 SH |
1717 | fprintf(f, "# Template used to create this container: %s\n", t); |
1718 | if (argv) { | |
1719 | fprintf(f, "# Parameters passed to the template:"); | |
1720 | while (*argv) { | |
1721 | fprintf(f, " %s", *argv); | |
1722 | argv++; | |
1723 | } | |
1724 | fprintf(f, "\n"); | |
1725 | } | |
a73846d8 | 1726 | |
3ce74686 | 1727 | #if HAVE_LIBGNUTLS |
56698177 SH |
1728 | fprintf(f, "# Template script checksum (SHA-1): "); |
1729 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1730 | fprintf(f, "%02x", md_value[i]); | |
1731 | fprintf(f, "\n"); | |
3ce74686 | 1732 | #endif |
0520c252 | 1733 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1734 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1735 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1736 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1737 | if (fwrite(contents, 1, flen, f) != flen) { |
1738 | SYSERROR("Writing original contents"); | |
1739 | free(contents); | |
1740 | fclose(f); | |
1741 | return false; | |
1742 | } | |
630ac7c6 | 1743 | |
025ed0f3 | 1744 | ret = 0; |
630ac7c6 | 1745 | |
025ed0f3 | 1746 | out_free_contents: |
3ce74686 | 1747 | free(contents); |
630ac7c6 | 1748 | |
025ed0f3 SH |
1749 | out_error: |
1750 | if (f) { | |
1751 | int newret; | |
025ed0f3 | 1752 | newret = fclose(f); |
025ed0f3 SH |
1753 | if (ret == 0) |
1754 | ret = newret; | |
1755 | } | |
630ac7c6 | 1756 | |
025ed0f3 SH |
1757 | if (ret < 0) { |
1758 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1759 | return false; |
1760 | } | |
630ac7c6 | 1761 | |
3ce74686 SH |
1762 | return true; |
1763 | } | |
1764 | ||
4df7f012 SH |
1765 | static void lxcapi_clear_config(struct lxc_container *c) |
1766 | { | |
e62fd16f CB |
1767 | if (!c || !c->lxc_conf) |
1768 | return; | |
1769 | ||
1770 | lxc_conf_free(c->lxc_conf); | |
1771 | c->lxc_conf = NULL; | |
4df7f012 SH |
1772 | } |
1773 | ||
858377e4 SH |
1774 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1775 | ||
96b3cb40 SH |
1776 | /* |
1777 | * lxcapi_create: | |
1778 | * create a container with the given parameters. | |
1779 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1780 | * configuration already set | |
1781 | * @t: the template to execute to instantiate the root filesystem and | |
1782 | * adjust the configuration. | |
1783 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1784 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1785 | * use. | |
1786 | * | |
1787 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1788 | * arguments, you can just pass NULL. | |
1789 | */ | |
858377e4 | 1790 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1791 | const char *bdevtype, struct bdev_specs *specs, |
1792 | int flags, char *const argv[]) | |
96b3cb40 | 1793 | { |
e9e29a33 | 1794 | int partial_fd; |
51f0f73b | 1795 | mode_t mask; |
96b3cb40 | 1796 | pid_t pid; |
e9e29a33 | 1797 | bool ret = false; |
85db5535 | 1798 | char *tpath = NULL; |
96b3cb40 SH |
1799 | |
1800 | if (!c) | |
1801 | return false; | |
1802 | ||
85db5535 DE |
1803 | if (t) { |
1804 | tpath = get_template_path(t); | |
1805 | if (!tpath) { | |
e9e29a33 | 1806 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1807 | goto out; |
1808 | } | |
96b3cb40 SH |
1809 | } |
1810 | ||
e9e29a33 CB |
1811 | /* If a template is passed in, and the rootfs already is defined in the |
1812 | * container config and exists, then the caller is trying to create an | |
1813 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1814 | */ |
858377e4 | 1815 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1816 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1817 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1818 | c->config_path); | |
6c6892b5 | 1819 | goto free_tpath; |
cf465fe4 SH |
1820 | } |
1821 | ||
6c6892b5 | 1822 | if (!c->lxc_conf) { |
858377e4 | 1823 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1824 | ERROR("Error loading default configuration file %s", |
1825 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1826 | goto free_tpath; |
1827 | } | |
96b3cb40 SH |
1828 | } |
1829 | ||
6c6892b5 DE |
1830 | if (!create_container_dir(c)) |
1831 | goto free_tpath; | |
1832 | ||
e9e29a33 CB |
1833 | /* If both template and rootfs.path are set, template is setup as |
1834 | * rootfs.path. The container is already created if we have a config and | |
1835 | * rootfs.path is accessible | |
0590e82c | 1836 | */ |
00370edd | 1837 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1838 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1839 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1840 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1841 | goto out; |
1842 | } | |
1843 | ret = true; | |
0590e82c | 1844 | goto out; |
00370edd | 1845 | } |
e9e29a33 CB |
1846 | |
1847 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1848 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1849 | goto out; |
e9e29a33 | 1850 | |
858377e4 | 1851 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1852 | /* Rootfs already existed, user just wanted to save the loaded |
1853 | * configuration. | |
1854 | */ | |
0f4cdd77 | 1855 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1856 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1857 | |
0590e82c SH |
1858 | ret = true; |
1859 | goto out; | |
a69aad27 | 1860 | } |
96b3cb40 SH |
1861 | |
1862 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1863 | partial_fd = create_partial(c); |
1864 | if (partial_fd < 0) | |
96b3cb40 SH |
1865 | goto out; |
1866 | ||
e9e29a33 | 1867 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1868 | |
51f0f73b KR |
1869 | mask = umask(0022); |
1870 | ||
e9e29a33 | 1871 | /* Create the storage. |
96b3cb40 SH |
1872 | * Note we can't do this in the same task as we use to execute the |
1873 | * template because of the way zfs works. | |
1874 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1875 | * namespace. | |
1876 | */ | |
1877 | pid = fork(); | |
1878 | if (pid < 0) { | |
e9e29a33 | 1879 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1880 | goto out_unlock; |
1881 | } | |
1882 | ||
1a0e70ac | 1883 | if (pid == 0) { /* child */ |
10bc1861 | 1884 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1885 | |
10bc1861 CB |
1886 | bdev = do_storage_create(c, bdevtype, specs); |
1887 | if (!bdev) { | |
e9e29a33 CB |
1888 | ERROR("Failed to create %s storage for %s", |
1889 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1890 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1891 | } |
1892 | ||
e9e29a33 | 1893 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1894 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1895 | ERROR("Failed to save initial config for %s", c->name); |
1896 | /* Parent task won't see the storage driver in the | |
1897 | * config so we delete it. | |
1898 | */ | |
96b3cb40 SH |
1899 | bdev->ops->umount(bdev); |
1900 | bdev->ops->destroy(bdev); | |
85aec4ac | 1901 | _exit(EXIT_FAILURE); |
96b3cb40 | 1902 | } |
a73846d8 | 1903 | |
85aec4ac | 1904 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1905 | } |
a73846d8 | 1906 | |
96b3cb40 | 1907 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1908 | goto out_unlock; |
96b3cb40 | 1909 | |
e9e29a33 | 1910 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1911 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1912 | c->lxc_conf = NULL; |
a73846d8 | 1913 | |
96b3cb40 | 1914 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1915 | goto out_unlock; |
96b3cb40 | 1916 | |
dc23c1c8 | 1917 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1918 | goto out_unlock; |
1919 | ||
1a0e70ac CB |
1920 | /* Now clear out the lxc_conf we have, reload from the created |
1921 | * container. | |
1922 | */ | |
858377e4 | 1923 | do_lxcapi_clear_config(c); |
3ce74686 | 1924 | |
9d65a487 KY |
1925 | if (t) { |
1926 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1927 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1928 | goto out_unlock; |
1929 | } | |
3ce74686 | 1930 | } |
a73846d8 | 1931 | |
a69aad27 | 1932 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1933 | |
1934 | out_unlock: | |
51f0f73b | 1935 | umask(mask); |
3e625e2d SH |
1936 | if (partial_fd >= 0) |
1937 | remove_partial(c, partial_fd); | |
a73846d8 | 1938 | |
72d0e1cb | 1939 | out: |
c55d4505 | 1940 | if (!ret) |
17a367d8 | 1941 | container_destroy(c, NULL); |
a73846d8 | 1942 | |
6c6892b5 | 1943 | free_tpath: |
f10fad2f | 1944 | free(tpath); |
a69aad27 | 1945 | return ret; |
72d0e1cb SG |
1946 | } |
1947 | ||
858377e4 | 1948 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1949 | const char *bdevtype, struct bdev_specs *specs, |
1950 | int flags, char *const argv[]) | |
858377e4 SH |
1951 | { |
1952 | bool ret; | |
a73846d8 | 1953 | |
858377e4 | 1954 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1955 | |
858377e4 SH |
1956 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1957 | current_config = NULL; | |
1958 | return ret; | |
1959 | } | |
1960 | ||
1961 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1962 | { |
9dd54153 | 1963 | int ret; |
3e625e2d | 1964 | pid_t pid; |
dd267776 | 1965 | int rebootsignal = SIGINT; |
3e625e2d SH |
1966 | |
1967 | if (!c) | |
1968 | return false; | |
9dd54153 | 1969 | |
858377e4 | 1970 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1971 | return false; |
9dd54153 | 1972 | |
858377e4 | 1973 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1974 | if (pid <= 0) |
1975 | return false; | |
9dd54153 | 1976 | |
dd267776 BP |
1977 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1978 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
1979 | |
1980 | ret = kill(pid, rebootsignal); | |
1981 | if (ret < 0) { | |
1982 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 1983 | return false; |
591614a7 | 1984 | } |
3e625e2d | 1985 | |
9dd54153 | 1986 | return true; |
3e625e2d SH |
1987 | } |
1988 | ||
858377e4 SH |
1989 | WRAP_API(bool, lxcapi_reboot) |
1990 | ||
d39b10eb CB |
1991 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
1992 | { | |
1993 | int killret, ret; | |
1994 | pid_t pid; | |
1995 | int rebootsignal = SIGINT, state_client_fd = -1; | |
1996 | lxc_state_t states[MAX_STATE] = {0}; | |
1997 | ||
1998 | if (!c) | |
1999 | return false; | |
2000 | ||
2001 | if (!do_lxcapi_is_running(c)) | |
2002 | return true; | |
2003 | ||
2004 | pid = do_lxcapi_init_pid(c); | |
2005 | if (pid <= 0) | |
2006 | return true; | |
2007 | ||
2008 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2009 | rebootsignal = c->lxc_conf->rebootsignal; | |
2010 | ||
2011 | /* Add a new state client before sending the shutdown signal so that we | |
2012 | * don't miss a state. | |
2013 | */ | |
2014 | if (timeout != 0) { | |
2015 | states[RUNNING] = 2; | |
2016 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2017 | &state_client_fd); | |
2018 | if (ret < 0) | |
2019 | return false; | |
2020 | ||
2021 | if (state_client_fd < 0) | |
2022 | return false; | |
2023 | ||
2024 | if (ret == RUNNING) | |
2025 | return true; | |
2026 | ||
2027 | if (ret < MAX_STATE) | |
2028 | return false; | |
2029 | } | |
2030 | ||
2031 | /* Send reboot signal to container. */ | |
2032 | killret = kill(pid, rebootsignal); | |
2033 | if (killret < 0) { | |
d39b10eb CB |
2034 | if (state_client_fd >= 0) |
2035 | close(state_client_fd); | |
a73846d8 | 2036 | |
9dd54153 | 2037 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2038 | return false; |
2039 | } | |
2040 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2041 | ||
a579fa51 | 2042 | if (timeout == 0) |
d39b10eb CB |
2043 | return true; |
2044 | ||
2045 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2046 | close(state_client_fd); | |
2047 | if (ret < 0) | |
2048 | return false; | |
2049 | ||
2050 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2051 | if (ret != RUNNING) | |
2052 | return false; | |
2053 | ||
2054 | return true; | |
2055 | } | |
2056 | ||
2057 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2058 | ||
858377e4 | 2059 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2060 | { |
f8bdb6dc | 2061 | int killret, ret; |
72d0e1cb | 2062 | pid_t pid; |
9dd54153 | 2063 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2064 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2065 | |
2066 | if (!c) | |
2067 | return false; | |
2068 | ||
858377e4 | 2069 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2070 | return true; |
f8bdb6dc | 2071 | |
858377e4 | 2072 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2073 | if (pid <= 0) |
2074 | return true; | |
330ae3d3 CB |
2075 | |
2076 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2077 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2078 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2079 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2080 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2081 | |
92e35018 CB |
2082 | /* Add a new state client before sending the shutdown signal so that we |
2083 | * don't miss a state. | |
2084 | */ | |
f8bdb6dc CB |
2085 | if (timeout != 0) { |
2086 | states[STOPPED] = 1; | |
2087 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2088 | &state_client_fd); | |
2089 | if (ret < 0) | |
2090 | return false; | |
92e35018 | 2091 | |
f8bdb6dc CB |
2092 | if (state_client_fd < 0) |
2093 | return false; | |
2094 | ||
2095 | if (ret == STOPPED) | |
2096 | return true; | |
591614a7 | 2097 | |
f8bdb6dc | 2098 | if (ret < MAX_STATE) |
92e35018 | 2099 | return false; |
92e35018 CB |
2100 | } |
2101 | ||
f8bdb6dc CB |
2102 | /* Send shutdown signal to container. */ |
2103 | killret = kill(pid, haltsignal); | |
2104 | if (killret < 0) { | |
f8bdb6dc CB |
2105 | if (state_client_fd >= 0) |
2106 | close(state_client_fd); | |
a73846d8 | 2107 | |
9dd54153 | 2108 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2109 | return false; |
2110 | } | |
2111 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2112 | ||
923929f6 | 2113 | if (timeout == 0) |
f8bdb6dc CB |
2114 | return true; |
2115 | ||
2116 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2117 | close(state_client_fd); | |
2118 | if (ret < 0) | |
2119 | return false; | |
2120 | ||
2121 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2122 | if (ret != STOPPED) | |
2123 | return false; | |
2124 | ||
2125 | return true; | |
72d0e1cb SG |
2126 | } |
2127 | ||
858377e4 SH |
2128 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2129 | ||
1897e3bc | 2130 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2131 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2132 | { |
2133 | bool bret = false; | |
a0e93eeb | 2134 | char **args = NULL; |
72d0e1cb | 2135 | va_list ap; |
72d0e1cb SG |
2136 | |
2137 | if (!c) | |
2138 | return false; | |
2139 | ||
858377e4 SH |
2140 | current_config = c->lxc_conf; |
2141 | ||
72d0e1cb SG |
2142 | /* |
2143 | * since we're going to wait for create to finish, I don't think we | |
2144 | * need to get a copy of the arguments. | |
2145 | */ | |
dc23c1c8 | 2146 | va_start(ap, flags); |
a0e93eeb | 2147 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2148 | va_end(ap); |
a0e93eeb | 2149 | if (!args) { |
e9e29a33 | 2150 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2151 | goto out; |
2152 | } | |
72d0e1cb | 2153 | |
858377e4 | 2154 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2155 | |
2156 | out: | |
a0e93eeb | 2157 | free(args); |
858377e4 | 2158 | current_config = NULL; |
72d0e1cb SG |
2159 | return bret; |
2160 | } | |
2161 | ||
6b0d5538 SH |
2162 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2163 | { | |
4222a9f4 CB |
2164 | if (!strcmp(key, "lxc.cgroup")) |
2165 | return clear_unexp_config_line(conf, key, true); | |
2166 | ||
2167 | if (!strcmp(key, "lxc.network")) | |
2168 | return clear_unexp_config_line(conf, key, true); | |
2169 | ||
2170 | if (!strcmp(key, "lxc.net")) | |
2171 | return clear_unexp_config_line(conf, key, true); | |
2172 | ||
2173 | /* Clear a network with a specific index. */ | |
2174 | if (!strncmp(key, "lxc.net.", 8)) { | |
2175 | int ret; | |
2176 | const char *idx; | |
2177 | ||
2178 | idx = key + 8; | |
2179 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2180 | if (!ret) | |
2181 | return clear_unexp_config_line(conf, key, true); | |
2182 | } | |
2183 | ||
2184 | if (!strcmp(key, "lxc.hook")) | |
2185 | return clear_unexp_config_line(conf, key, true); | |
2186 | ||
2187 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2188 | } |
2189 | ||
6afd673f CB |
2190 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2191 | const char *key) | |
72d0e1cb | 2192 | { |
6afd673f CB |
2193 | int ret = 1; |
2194 | struct lxc_config_t *config; | |
72d0e1cb SG |
2195 | |
2196 | if (!c || !c->lxc_conf) | |
2197 | return false; | |
6afd673f | 2198 | |
5cee8c50 | 2199 | if (container_mem_lock(c)) |
72d0e1cb | 2200 | return false; |
6afd673f | 2201 | |
300df83e | 2202 | config = lxc_get_config(key); |
6afd673f CB |
2203 | /* Verify that the config key exists and that it has a callback |
2204 | * implemented. | |
2205 | */ | |
2206 | if (config && config->clr) | |
26471403 | 2207 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2208 | |
6b0d5538 SH |
2209 | if (!ret) |
2210 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2211 | |
5cee8c50 | 2212 | container_mem_unlock(c); |
72d0e1cb SG |
2213 | return ret == 0; |
2214 | } | |
2215 | ||
858377e4 SH |
2216 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2217 | ||
e0f59189 | 2218 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2219 | { |
858377e4 | 2220 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2221 | |
a73846d8 | 2222 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2223 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2224 | if (!switch_to_ns(pid, "user")) |
2225 | return false; | |
a73846d8 | 2226 | |
51d0854c | 2227 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2228 | } |
2229 | ||
1a0e70ac | 2230 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2231 | static inline int string_cmp(char **first, char **second) |
2232 | { | |
2233 | return strcmp(*first, *second); | |
2234 | } | |
2235 | ||
1a0e70ac CB |
2236 | /* Used by qsort and bsearch functions for comparing container names. */ |
2237 | static inline int container_cmp(struct lxc_container **first, | |
2238 | struct lxc_container **second) | |
9c88ff1f ÇO |
2239 | { |
2240 | return strcmp((*first)->name, (*second)->name); | |
2241 | } | |
2242 | ||
2243 | static bool add_to_array(char ***names, char *cname, int pos) | |
2244 | { | |
2245 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2246 | if (!newnames) { | |
2247 | ERROR("Out of memory"); | |
2248 | return false; | |
2249 | } | |
2250 | ||
2251 | *names = newnames; | |
2252 | newnames[pos] = strdup(cname); | |
2253 | if (!newnames[pos]) | |
2254 | return false; | |
2255 | ||
1a0e70ac CB |
2256 | /* Sort the arrray as we will use binary search on it. */ |
2257 | qsort(newnames, pos + 1, sizeof(char *), | |
2258 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2259 | |
2260 | return true; | |
2261 | } | |
2262 | ||
1a0e70ac CB |
2263 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2264 | int pos, bool sort) | |
9c88ff1f | 2265 | { |
1a0e70ac | 2266 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2267 | if (!newlist) { |
2268 | ERROR("Out of memory"); | |
2269 | return false; | |
2270 | } | |
2271 | ||
2272 | *list = newlist; | |
2273 | newlist[pos] = c; | |
2274 | ||
1a0e70ac | 2275 | /* Sort the arrray as we will use binary search on it. */ |
2871830a | 2276 | if (sort) |
1a0e70ac CB |
2277 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2278 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2279 | |
2280 | return true; | |
2281 | } | |
2282 | ||
2283 | static char** get_from_array(char ***names, char *cname, int size) | |
2284 | { | |
2285 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2286 | } | |
2287 | ||
a73846d8 | 2288 | static bool array_contains(char ***names, char *cname, int size) |
2289 | { | |
9c88ff1f ÇO |
2290 | if(get_from_array(names, cname, size) != NULL) |
2291 | return true; | |
a73846d8 | 2292 | |
9c88ff1f ÇO |
2293 | return false; |
2294 | } | |
2295 | ||
2296 | static bool remove_from_array(char ***names, char *cname, int size) | |
2297 | { | |
2298 | char **result = get_from_array(names, cname, size); | |
2299 | if (result != NULL) { | |
2300 | free(result); | |
2301 | return true; | |
2302 | } | |
a73846d8 | 2303 | |
9c88ff1f ÇO |
2304 | return false; |
2305 | } | |
2306 | ||
9f4866a6 | 2307 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2308 | { |
ae22a220 ÇO |
2309 | pid_t pid; |
2310 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2311 | char **interfaces = NULL; |
ae22a220 | 2312 | char interface[IFNAMSIZ]; |
799f29ab | 2313 | |
0ac84f04 | 2314 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2315 | return NULL; |
c868b261 | 2316 | |
ae22a220 ÇO |
2317 | pid = fork(); |
2318 | if (pid < 0) { | |
9f4866a6 | 2319 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2320 | close(pipefd[0]); |
2321 | close(pipefd[1]); | |
2322 | return NULL; | |
2323 | } | |
799f29ab | 2324 | |
1a0e70ac | 2325 | if (pid == 0) { /* child */ |
ae22a220 | 2326 | int ret = 1, nbytes; |
b1e44ed1 | 2327 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
ae22a220 ÇO |
2328 | |
2329 | /* close the read-end of the pipe */ | |
2330 | close(pipefd[0]); | |
2331 | ||
e0f59189 | 2332 | if (!enter_net_ns(c)) { |
9f4866a6 | 2333 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2334 | goto out; |
2335 | } | |
2336 | ||
2337 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2338 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
9f4866a6 | 2339 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2340 | goto out; |
2341 | } | |
2342 | ||
2343 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2344 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2345 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2346 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2347 | if (nbytes < 0) |
ae22a220 | 2348 | goto out; |
9f4866a6 | 2349 | |
ae22a220 ÇO |
2350 | count++; |
2351 | } | |
a73846d8 | 2352 | |
ae22a220 ÇO |
2353 | ret = 0; |
2354 | ||
2355 | out: | |
2356 | if (interfaceArray) | |
b1e44ed1 | 2357 | netns_freeifaddrs(interfaceArray); |
ae22a220 ÇO |
2358 | |
2359 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2360 | close(pipefd[1]); | |
02c611b0 | 2361 | _exit(ret); |
799f29ab ÇO |
2362 | } |
2363 | ||
ae22a220 ÇO |
2364 | /* close the write-end of the pipe */ |
2365 | close(pipefd[1]); | |
2366 | ||
3e1e9db8 | 2367 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2368 | interface[IFNAMSIZ - 1] = '\0'; |
2369 | ||
ae22a220 | 2370 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2371 | continue; |
799f29ab | 2372 | |
9f4866a6 | 2373 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2374 | ERROR("Failed to add \"%s\" to array", interface); |
2375 | ||
9c88ff1f ÇO |
2376 | count++; |
2377 | } | |
799f29ab | 2378 | |
ae22a220 | 2379 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2380 | for (i = 0; i < count; i++) |
ae22a220 | 2381 | free(interfaces[i]); |
a73846d8 | 2382 | |
ae22a220 ÇO |
2383 | free(interfaces); |
2384 | interfaces = NULL; | |
2385 | } | |
9c88ff1f | 2386 | |
ae22a220 ÇO |
2387 | /* close the read-end of the pipe */ |
2388 | close(pipefd[0]); | |
799f29ab | 2389 | |
9c88ff1f | 2390 | /* Append NULL to the array */ |
9f4866a6 | 2391 | if (interfaces) |
9c88ff1f | 2392 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2393 | |
9c88ff1f | 2394 | return interfaces; |
799f29ab ÇO |
2395 | } |
2396 | ||
858377e4 SH |
2397 | WRAP_API(char **, lxcapi_get_interfaces) |
2398 | ||
02a0e184 CB |
2399 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2400 | const char *family, int scope) | |
799f29ab | 2401 | { |
02a0e184 | 2402 | int i, ret; |
ae22a220 | 2403 | pid_t pid; |
02a0e184 | 2404 | int pipefd[2]; |
ae22a220 | 2405 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2406 | int count = 0; |
2407 | char **addresses = NULL; | |
799f29ab | 2408 | |
0ac84f04 | 2409 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2410 | if (ret < 0) { |
2411 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2412 | return NULL; |
c868b261 ÇO |
2413 | } |
2414 | ||
ae22a220 ÇO |
2415 | pid = fork(); |
2416 | if (pid < 0) { | |
02a0e184 | 2417 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2418 | close(pipefd[0]); |
2419 | close(pipefd[1]); | |
2420 | return NULL; | |
9c83a661 SG |
2421 | } |
2422 | ||
02a0e184 CB |
2423 | if (pid == 0) { |
2424 | ssize_t nbytes; | |
ae22a220 | 2425 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
02a0e184 | 2426 | int ret = 1; |
ae22a220 | 2427 | char *address = NULL; |
02a0e184 | 2428 | void *tempAddrPtr = NULL; |
b1e44ed1 | 2429 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
fe218ca3 | 2430 | |
ae22a220 ÇO |
2431 | /* close the read-end of the pipe */ |
2432 | close(pipefd[0]); | |
2433 | ||
e0f59189 | 2434 | if (!enter_net_ns(c)) { |
02a0e184 | 2435 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2436 | goto out; |
9c83a661 | 2437 | } |
ae22a220 ÇO |
2438 | |
2439 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2440 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
02a0e184 | 2441 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2442 | goto out; |
2443 | } | |
2444 | ||
2445 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2446 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2447 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2448 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2449 | continue; |
2450 | ||
6ce39620 CB |
2451 | #pragma GCC diagnostic push |
2452 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2453 | ||
02a0e184 | 2454 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2455 | if (family && strcmp(family, "inet")) |
2456 | continue; | |
02a0e184 | 2457 | |
ae22a220 | 2458 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2459 | } else { |
ae22a220 ÇO |
2460 | if (family && strcmp(family, "inet6")) |
2461 | continue; | |
2462 | ||
2463 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2464 | continue; | |
2465 | ||
2466 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2467 | } | |
2468 | ||
6ce39620 CB |
2469 | #pragma GCC diagnostic pop |
2470 | ||
ae22a220 ÇO |
2471 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) |
2472 | continue; | |
2473 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2474 | continue; |
2475 | ||
ae22a220 | 2476 | address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2477 | tempAddrPtr, addressOutputBuffer, |
2478 | sizeof(addressOutputBuffer)); | |
ae22a220 | 2479 | if (!address) |
02a0e184 | 2480 | continue; |
ae22a220 | 2481 | |
02a0e184 CB |
2482 | nbytes = lxc_write_nointr(pipefd[1], address, INET6_ADDRSTRLEN); |
2483 | if (nbytes != INET6_ADDRSTRLEN) { | |
2484 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
2485 | address); | |
ae22a220 ÇO |
2486 | goto out; |
2487 | } | |
a73846d8 | 2488 | |
ae22a220 | 2489 | count++; |
9c83a661 | 2490 | } |
a73846d8 | 2491 | |
ae22a220 | 2492 | ret = 0; |
9c83a661 | 2493 | |
ae22a220 | 2494 | out: |
02a0e184 | 2495 | if (interfaceArray) |
b1e44ed1 | 2496 | netns_freeifaddrs(interfaceArray); |
9c83a661 | 2497 | |
ae22a220 ÇO |
2498 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2499 | close(pipefd[1]); | |
fe1ce58c | 2500 | _exit(ret); |
6849cb5b | 2501 | } |
9c83a661 | 2502 | |
ae22a220 ÇO |
2503 | /* close the write-end of the pipe */ |
2504 | close(pipefd[1]); | |
2505 | ||
02a0e184 CB |
2506 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2507 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2508 | ||
2509 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2510 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2511 | |
9c88ff1f | 2512 | count++; |
9c83a661 SG |
2513 | } |
2514 | ||
ae22a220 | 2515 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2516 | for (i = 0; i < count; i++) |
ae22a220 | 2517 | free(addresses[i]); |
02a0e184 | 2518 | |
ae22a220 ÇO |
2519 | free(addresses); |
2520 | addresses = NULL; | |
2521 | } | |
9c83a661 | 2522 | |
ae22a220 ÇO |
2523 | /* close the read-end of the pipe */ |
2524 | close(pipefd[0]); | |
9c83a661 SG |
2525 | |
2526 | /* Append NULL to the array */ | |
02a0e184 | 2527 | if (addresses) |
9c88ff1f | 2528 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2529 | |
2530 | return addresses; | |
2531 | } | |
2532 | ||
858377e4 SH |
2533 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2534 | ||
2535 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2536 | { |
fce687aa CB |
2537 | int ret = -1; |
2538 | struct lxc_config_t *config; | |
72d0e1cb SG |
2539 | |
2540 | if (!c || !c->lxc_conf) | |
2541 | return -1; | |
fce687aa | 2542 | |
5cee8c50 | 2543 | if (container_mem_lock(c)) |
72d0e1cb | 2544 | return -1; |
fce687aa | 2545 | |
300df83e | 2546 | config = lxc_get_config(key); |
fce687aa CB |
2547 | /* Verify that the config key exists and that it has a callback |
2548 | * implemented. | |
2549 | */ | |
2550 | if (config && config->get) | |
cccd2219 | 2551 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2552 | |
5cee8c50 | 2553 | container_mem_unlock(c); |
72d0e1cb SG |
2554 | return ret; |
2555 | } | |
2556 | ||
858377e4 SH |
2557 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2558 | ||
2559 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2560 | { |
2561 | char *ret; | |
2562 | ||
2563 | if (!c || !c->lxc_conf) | |
2564 | return NULL; | |
a73846d8 | 2565 | |
8ac18377 ÇO |
2566 | if (container_mem_lock(c)) |
2567 | return NULL; | |
a73846d8 | 2568 | |
858377e4 | 2569 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2570 | container_mem_unlock(c); |
2571 | return ret; | |
2572 | } | |
2573 | ||
858377e4 SH |
2574 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2575 | ||
2576 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2577 | { |
300df83e CB |
2578 | int ret = -1; |
2579 | ||
2580 | /* List all config items. */ | |
72d0e1cb | 2581 | if (!key) |
cfc67626 | 2582 | return lxc_list_config_items(retv, inlen); |
300df83e | 2583 | |
72d0e1cb SG |
2584 | if (!c || !c->lxc_conf) |
2585 | return -1; | |
300df83e | 2586 | |
5cee8c50 | 2587 | if (container_mem_lock(c)) |
72d0e1cb | 2588 | return -1; |
300df83e CB |
2589 | |
2590 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2591 | * This is an intelligent result to show which keys are valid given the | |
2592 | * type of nic it is. | |
2593 | */ | |
6fba98b5 | 2594 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2595 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2596 | else |
2597 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2598 | |
5cee8c50 | 2599 | container_mem_unlock(c); |
72d0e1cb SG |
2600 | return ret; |
2601 | } | |
2602 | ||
858377e4 SH |
2603 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2604 | ||
2605 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2606 | { |
0e1a60b0 | 2607 | int fd, lret; |
39dc698c | 2608 | bool ret = false, need_disklock = false; |
39dc698c | 2609 | |
72d0e1cb SG |
2610 | if (!alt_file) |
2611 | alt_file = c->configfile; | |
a73846d8 | 2612 | |
72d0e1cb | 2613 | if (!alt_file) |
1a0e70ac | 2614 | return false; |
39dc698c | 2615 | |
1a0e70ac | 2616 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2617 | if (!c->lxc_conf) { |
858377e4 | 2618 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2619 | ERROR("Error loading default configuration file %s " |
2620 | "while saving %s", | |
2621 | lxc_global_config_value("lxc.default_config"), | |
2622 | c->name); | |
72d0e1cb SG |
2623 | return false; |
2624 | } | |
39dc698c | 2625 | } |
72d0e1cb | 2626 | |
5a3d2e1e SG |
2627 | if (!create_container_dir(c)) |
2628 | return false; | |
2629 | ||
1a0e70ac CB |
2630 | /* If we're writing to the container's config file, take the disk lock. |
2631 | * Otherwise just take the memlock to protect the struct lxc_container | |
2632 | * while we're traversing it. | |
39dc698c SH |
2633 | */ |
2634 | if (strcmp(c->configfile, alt_file) == 0) | |
2635 | need_disklock = true; | |
2636 | ||
2637 | if (need_disklock) | |
2638 | lret = container_disk_lock(c); | |
2639 | else | |
2640 | lret = container_mem_lock(c); | |
39dc698c | 2641 | if (lret) |
72d0e1cb | 2642 | return false; |
39dc698c | 2643 | |
10034af5 | 2644 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2645 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2646 | if (fd < 0) |
2647 | goto on_error; | |
2648 | ||
2649 | lret = write_config(fd, c->lxc_conf); | |
2650 | close(fd); | |
2651 | if (lret < 0) | |
2652 | goto on_error; | |
2653 | ||
39dc698c SH |
2654 | ret = true; |
2655 | ||
0e1a60b0 | 2656 | on_error: |
39dc698c SH |
2657 | if (need_disklock) |
2658 | container_disk_unlock(c); | |
2659 | else | |
2660 | container_mem_unlock(c); | |
0e1a60b0 | 2661 | |
39dc698c | 2662 | return ret; |
72d0e1cb SG |
2663 | } |
2664 | ||
858377e4 SH |
2665 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2666 | ||
0ea055b3 CB |
2667 | |
2668 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2669 | { |
0ea055b3 CB |
2670 | FILE *f1; |
2671 | struct stat fbuf; | |
42342bed CB |
2672 | void *buf = NULL; |
2673 | char *del = NULL; | |
dfb31b25 | 2674 | char path[MAXPATHLEN]; |
0ea055b3 CB |
2675 | char newpath[MAXPATHLEN]; |
2676 | int fd, ret, n = 0, v = 0; | |
dfb31b25 | 2677 | bool bret = false; |
42342bed | 2678 | size_t len = 0, bytes = 0; |
dfb31b25 | 2679 | |
0ea055b3 | 2680 | if (container_disk_lock(c0)) |
dfb31b25 | 2681 | return false; |
0ea055b3 CB |
2682 | |
2683 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c0->config_path, c0->name); | |
dfb31b25 SH |
2684 | if (ret < 0 || ret > MAXPATHLEN) |
2685 | goto out; | |
a73846d8 | 2686 | |
0ea055b3 CB |
2687 | ret = snprintf(newpath, MAXPATHLEN, "%s\n%s\n", c->config_path, c->name); |
2688 | if (ret < 0 || ret > MAXPATHLEN) | |
dfb31b25 | 2689 | goto out; |
0ea055b3 CB |
2690 | |
2691 | /* If we find an lxc-snapshot file using the old format only listing the | |
2692 | * number of snapshots we will keep using it. */ | |
2693 | f1 = fopen(path, "r"); | |
2694 | if (f1) { | |
2695 | n = fscanf(f1, "%d", &v); | |
2696 | fclose(f1); | |
2697 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2698 | ret = remove(path); |
2699 | if (ret < 0) | |
6d1400b5 | 2700 | SYSERROR("Failed to remove \"%s\"", path); |
2701 | ||
0ea055b3 CB |
2702 | n = 0; |
2703 | } | |
dfb31b25 | 2704 | } |
6d1400b5 | 2705 | |
0ea055b3 CB |
2706 | if (n == 1) { |
2707 | v += inc ? 1 : -1; | |
2708 | f1 = fopen(path, "w"); | |
2709 | if (!f1) | |
2710 | goto out; | |
6d1400b5 | 2711 | |
0ea055b3 CB |
2712 | if (fprintf(f1, "%d\n", v) < 0) { |
2713 | ERROR("Error writing new snapshots value"); | |
2714 | fclose(f1); | |
2715 | goto out; | |
2716 | } | |
6d1400b5 | 2717 | |
0ea055b3 CB |
2718 | ret = fclose(f1); |
2719 | if (ret != 0) { | |
2720 | SYSERROR("Error writing to or closing snapshots file"); | |
2721 | goto out; | |
2722 | } | |
2723 | } else { | |
2724 | /* Here we know that we have or can use an lxc-snapshot file | |
2725 | * using the new format. */ | |
2726 | if (inc) { | |
2727 | f1 = fopen(path, "a"); | |
2728 | if (!f1) | |
2729 | goto out; | |
2730 | ||
2731 | if (fprintf(f1, "%s", newpath) < 0) { | |
2732 | ERROR("Error writing new snapshots entry"); | |
2733 | ret = fclose(f1); | |
2734 | if (ret != 0) | |
2735 | SYSERROR("Error writing to or closing snapshots file"); | |
2736 | goto out; | |
2737 | } | |
2738 | ||
2739 | ret = fclose(f1); | |
2740 | if (ret != 0) { | |
2741 | SYSERROR("Error writing to or closing snapshots file"); | |
2742 | goto out; | |
2743 | } | |
2744 | } else if (!inc) { | |
d028235d SG |
2745 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2746 | goto out; | |
2747 | ||
2748 | if (fstat(fd, &fbuf) < 0) { | |
2749 | close(fd); | |
2750 | goto out; | |
2751 | } | |
2752 | ||
2753 | if (fbuf.st_size != 0) { | |
25086a5f | 2754 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2755 | if (buf == MAP_FAILED) { |
2756 | SYSERROR("Failed to create mapping %s", path); | |
2757 | close(fd); | |
2758 | goto out; | |
2759 | } | |
2760 | ||
2761 | len = strlen(newpath); | |
2762 | while ((del = strstr((char *)buf, newpath))) { | |
2763 | memmove(del, del + len, strlen(del) - len + 1); | |
2764 | bytes += len; | |
2765 | } | |
2766 | ||
25086a5f | 2767 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2768 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2769 | SYSERROR("Failed to truncate file %s", path); | |
2770 | close(fd); | |
2771 | goto out; | |
2772 | } | |
2773 | } | |
a73846d8 | 2774 | |
d028235d SG |
2775 | close(fd); |
2776 | } | |
0ea055b3 CB |
2777 | |
2778 | /* If the lxc-snapshot file is empty, remove it. */ | |
2779 | if (stat(path, &fbuf) < 0) | |
2780 | goto out; | |
6d1400b5 | 2781 | |
d028235d | 2782 | if (!fbuf.st_size) { |
71261a5c CB |
2783 | ret = remove(path); |
2784 | if (ret < 0) | |
2785 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2786 | } |
dfb31b25 SH |
2787 | } |
2788 | ||
2789 | bret = true; | |
2790 | ||
2791 | out: | |
0ea055b3 | 2792 | container_disk_unlock(c0); |
dfb31b25 SH |
2793 | return bret; |
2794 | } | |
2795 | ||
d825fff3 | 2796 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2797 | { |
2798 | struct lxc_container *p; | |
2799 | char *lxcpath = NULL, *lxcname = NULL, path[MAXPATHLEN]; | |
2800 | size_t pathlen = 0, namelen = 0; | |
2801 | FILE *f; | |
2802 | int ret; | |
2803 | ||
2804 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", | |
2805 | c->config_path, c->name); | |
2806 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2807 | ERROR("Path name too long"); | |
2808 | return; | |
2809 | } | |
a73846d8 | 2810 | |
025ed0f3 | 2811 | f = fopen(path, "r"); |
025ed0f3 | 2812 | if (f == NULL) |
dfb31b25 | 2813 | return; |
a73846d8 | 2814 | |
dfb31b25 SH |
2815 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2816 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2817 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2818 | goto out; |
2819 | } | |
7ad37670 CB |
2820 | |
2821 | remove_trailing_newlines(lxcpath); | |
2822 | remove_trailing_newlines(lxcname); | |
2823 | ||
dfb31b25 SH |
2824 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2825 | ERROR("Unable to find dependent container %s:%s", | |
2826 | lxcpath, lxcname); | |
2827 | continue; | |
2828 | } | |
a73846d8 | 2829 | |
0ea055b3 CB |
2830 | if (!mod_rdep(p, c, inc)) |
2831 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2832 | lxcpath, lxcname); |
a73846d8 | 2833 | |
dfb31b25 SH |
2834 | lxc_container_put(p); |
2835 | } | |
a73846d8 | 2836 | |
dfb31b25 | 2837 | out: |
f10fad2f ME |
2838 | free(lxcpath); |
2839 | free(lxcname); | |
dfb31b25 SH |
2840 | fclose(f); |
2841 | } | |
2842 | ||
18aa217b | 2843 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2844 | { |
0ea055b3 | 2845 | FILE *f; |
dfb31b25 SH |
2846 | char path[MAXPATHLEN]; |
2847 | int ret, v; | |
0ea055b3 | 2848 | struct stat fbuf; |
dfb31b25 SH |
2849 | bool bret = false; |
2850 | ||
2851 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
2852 | c->name); | |
2853 | if (ret < 0 || ret > MAXPATHLEN) | |
2854 | goto out; | |
a73846d8 | 2855 | |
0ea055b3 CB |
2856 | /* If the file doesn't exist there are no snapshots. */ |
2857 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2858 | goto out; |
a73846d8 | 2859 | |
0ea055b3 CB |
2860 | v = fbuf.st_size; |
2861 | if (v != 0) { | |
2862 | f = fopen(path, "r"); | |
2863 | if (!f) | |
2864 | goto out; | |
a73846d8 | 2865 | |
0ea055b3 CB |
2866 | ret = fscanf(f, "%d", &v); |
2867 | fclose(f); | |
1a0e70ac | 2868 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2869 | if (ret != 1) |
2870 | INFO("Container uses new lxc-snapshots format %s", path); | |
2871 | } | |
a73846d8 | 2872 | |
dfb31b25 SH |
2873 | bret = v != 0; |
2874 | ||
2875 | out: | |
2876 | return bret; | |
2877 | } | |
2878 | ||
18aa217b SH |
2879 | static bool has_snapshots(struct lxc_container *c) |
2880 | { | |
2881 | char path[MAXPATHLEN]; | |
74f96976 | 2882 | struct dirent *direntp; |
18aa217b SH |
2883 | int count=0; |
2884 | DIR *dir; | |
2885 | ||
2886 | if (!get_snappath_dir(c, path)) | |
2887 | return false; | |
a73846d8 | 2888 | |
18aa217b SH |
2889 | dir = opendir(path); |
2890 | if (!dir) | |
2891 | return false; | |
a73846d8 | 2892 | |
74f96976 | 2893 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2894 | if (!strcmp(direntp->d_name, ".")) |
2895 | continue; | |
2896 | ||
2897 | if (!strcmp(direntp->d_name, "..")) | |
2898 | continue; | |
2899 | count++; | |
2900 | break; | |
2901 | } | |
a73846d8 | 2902 | |
18aa217b SH |
2903 | closedir(dir); |
2904 | return count > 0; | |
2905 | } | |
2906 | ||
297c2d58 | 2907 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2908 | int ret; |
2909 | ||
e0010464 | 2910 | if (am_guest_unpriv()) { |
ee484f7f CB |
2911 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2912 | "storage_destroy_wrapper"); | |
2913 | if (ret < 0) | |
d028235d | 2914 | return false; |
ee484f7f | 2915 | |
d028235d SG |
2916 | return true; |
2917 | } | |
ee484f7f | 2918 | |
10bc1861 | 2919 | return storage_destroy(conf); |
297c2d58 CB |
2920 | } |
2921 | ||
4355ab5f SH |
2922 | static int lxc_rmdir_onedev_wrapper(void *data) |
2923 | { | |
2924 | char *arg = (char *) data; | |
18aa217b | 2925 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2926 | } |
2927 | ||
17a367d8 | 2928 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2929 | { |
17a367d8 CB |
2930 | char *arg = data; |
2931 | return unlink(arg); | |
2932 | } | |
2933 | ||
2934 | static bool container_destroy(struct lxc_container *c, | |
2935 | struct lxc_storage *storage) | |
2936 | { | |
2937 | const char *p1; | |
2938 | size_t len; | |
2939 | struct lxc_conf *conf; | |
2940 | char *path = NULL; | |
c868b261 | 2941 | bool bret = false; |
297c2d58 | 2942 | int ret = 0; |
72d0e1cb | 2943 | |
858377e4 | 2944 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2945 | return false; |
2946 | ||
a70a69e8 | 2947 | conf = c->lxc_conf; |
3bc449ed | 2948 | if (container_disk_lock(c)) |
72d0e1cb | 2949 | return false; |
72d0e1cb | 2950 | |
39dc698c | 2951 | if (!is_stopped(c)) { |
1a0e70ac | 2952 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2953 | ERROR("container %s is not stopped", c->name); |
2954 | goto out; | |
72d0e1cb SG |
2955 | } |
2956 | ||
a70a69e8 | 2957 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2958 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2959 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2960 | SYSERROR("Failed to set environment variable for container name"); |
2961 | ||
2962 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2963 | SYSERROR("Failed to set environment variable for config path"); | |
2964 | ||
2965 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2966 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2967 | ||
2968 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2969 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2970 | ||
2971 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2972 | SYSERROR("Failed to set environment variable for console path"); | |
2973 | ||
2974 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2975 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2976 | /* End of environment variable setup for hooks */ |
2977 | ||
14a7b0f9 | 2978 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2979 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2980 | goto out; |
2981 | } | |
2982 | } | |
2983 | ||
2984 | if (current_config && conf == current_config) { | |
858377e4 | 2985 | current_config = NULL; |
a73846d8 | 2986 | |
37cf711b SY |
2987 | if (conf->logfd != -1) { |
2988 | close(conf->logfd); | |
2989 | conf->logfd = -1; | |
858377e4 SH |
2990 | } |
2991 | } | |
2992 | ||
6e54330c CB |
2993 | /* LXC is not managing the storage of the container. */ |
2994 | if (conf && !conf->rootfs.managed) | |
2995 | goto on_success; | |
2996 | ||
d028235d SG |
2997 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
2998 | if (!do_destroy_container(conf)) { | |
2999 | ERROR("Error destroying rootfs for %s", c->name); | |
3000 | goto out; | |
3001 | } | |
3002 | INFO("Destroyed rootfs for %s", c->name); | |
3003 | } | |
60bf62d4 | 3004 | |
dfb31b25 SH |
3005 | mod_all_rdeps(c, false); |
3006 | ||
17a367d8 CB |
3007 | p1 = do_lxcapi_get_config_path(c); |
3008 | /* strlen(p1) | |
3009 | * + | |
3010 | * / | |
3011 | * + | |
3012 | * strlen(c->name) | |
3013 | * + | |
3014 | * / | |
3015 | * + | |
3016 | * strlen("config") = 6 | |
3017 | * + | |
3018 | * \0 | |
3019 | */ | |
3020 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
3021 | path = malloc(len); | |
3022 | if (!path) { | |
3023 | ERROR("Failed to allocate memory"); | |
3024 | goto out; | |
3025 | } | |
3026 | ||
3027 | /* For an overlay container the rootfs is considered immutable and | |
3028 | * cannot be removed when restoring from a snapshot. | |
3029 | */ | |
3030 | if (storage && (!strcmp(storage->type, "overlay") || | |
3031 | !strcmp(storage->type, "overlayfs")) && | |
3032 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3033 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
3034 | if (ret < 0 || (size_t)ret >= len) | |
3035 | goto out; | |
3036 | ||
e0010464 | 3037 | if (am_guest_unpriv()) |
17a367d8 CB |
3038 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3039 | "lxc_unlink_exec_wrapper"); | |
3040 | else | |
3041 | ret = unlink(path); | |
3042 | if (ret < 0) { | |
3043 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3044 | path, c->name); | |
3045 | goto out; | |
3046 | } | |
3047 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3048 | ||
3049 | bret = true; | |
3050 | goto out; | |
3051 | } | |
3052 | ||
3053 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3054 | if (ret < 0 || (size_t)ret >= len) | |
3055 | goto out; | |
a73846d8 | 3056 | |
e0010464 | 3057 | if (am_guest_unpriv()) |
ee484f7f CB |
3058 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3059 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3060 | else |
18aa217b | 3061 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3062 | if (ret < 0) { |
17a367d8 CB |
3063 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3064 | c->name); | |
60bf62d4 SH |
3065 | goto out; |
3066 | } | |
17a367d8 | 3067 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3068 | |
6e54330c | 3069 | on_success: |
fef48dc9 | 3070 | bret = true; |
60bf62d4 SH |
3071 | |
3072 | out: | |
17a367d8 CB |
3073 | if (path) |
3074 | free(path); | |
a73846d8 | 3075 | |
3bc449ed | 3076 | container_disk_unlock(c); |
fef48dc9 | 3077 | return bret; |
72d0e1cb SG |
3078 | } |
3079 | ||
858377e4 | 3080 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3081 | { |
3082 | if (!c || !lxcapi_is_defined(c)) | |
3083 | return false; | |
2b2655a8 | 3084 | |
6e54330c CB |
3085 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3086 | if (has_snapshots(c)) { | |
3087 | ERROR("Container %s has snapshots; not removing", c->name); | |
3088 | return false; | |
3089 | } | |
18aa217b | 3090 | |
6e54330c CB |
3091 | if (has_fs_snapshots(c)) { |
3092 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3093 | return false; | |
3094 | } | |
18aa217b SH |
3095 | } |
3096 | ||
17a367d8 | 3097 | return container_destroy(c, NULL); |
18aa217b SH |
3098 | } |
3099 | ||
858377e4 | 3100 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3101 | |
858377e4 | 3102 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3103 | { |
3104 | if (!c || !lxcapi_is_defined(c)) | |
3105 | return false; | |
a73846d8 | 3106 | |
18aa217b SH |
3107 | if (!lxcapi_snapshot_destroy_all(c)) { |
3108 | ERROR("Error deleting all snapshots"); | |
3109 | return false; | |
3110 | } | |
a73846d8 | 3111 | |
18aa217b SH |
3112 | return lxcapi_destroy(c); |
3113 | } | |
3114 | ||
858377e4 SH |
3115 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3116 | ||
0d9cd9c3 CB |
3117 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3118 | const char *v) | |
96532523 | 3119 | { |
0d9cd9c3 | 3120 | int ret; |
96532523 | 3121 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3122 | bool bret = true; |
3123 | ||
3124 | config = lxc_get_config(key); | |
3125 | if (!config) | |
3126 | return -EINVAL; | |
3127 | ||
3128 | ret = config->set(key, v, conf, NULL); | |
3129 | if (ret < 0) | |
3130 | return -EINVAL; | |
3131 | ||
3132 | if (lxc_config_value_empty(v)) | |
3133 | do_clear_unexp_config_line(conf, key); | |
3134 | else | |
3135 | bret = do_append_unexp_config_line(conf, key, v); | |
3136 | if (!bret) | |
3137 | return -ENOMEM; | |
3138 | ||
3139 | return 0; | |
3140 | } | |
3141 | ||
3142 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3143 | const char *v) | |
3144 | { | |
3145 | int ret; | |
96532523 SH |
3146 | |
3147 | if (!c->lxc_conf) | |
3148 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3149 | |
6b0d5538 | 3150 | if (!c->lxc_conf) |
96532523 | 3151 | return false; |
4222a9f4 | 3152 | |
0d9cd9c3 CB |
3153 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3154 | if (ret < 0) | |
f979ac15 | 3155 | return false; |
4222a9f4 | 3156 | |
0d9cd9c3 | 3157 | return true; |
96532523 SH |
3158 | } |
3159 | ||
858377e4 | 3160 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3161 | { |
72d0e1cb | 3162 | bool b = false; |
72d0e1cb SG |
3163 | |
3164 | if (!c) | |
3165 | return false; | |
3166 | ||
5cee8c50 | 3167 | if (container_mem_lock(c)) |
72d0e1cb SG |
3168 | return false; |
3169 | ||
0d9cd9c3 | 3170 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3171 | |
5cee8c50 | 3172 | container_mem_unlock(c); |
72d0e1cb SG |
3173 | return b; |
3174 | } | |
3175 | ||
858377e4 SH |
3176 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3177 | ||
72d0e1cb SG |
3178 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3179 | { | |
3180 | if (!c || !c->configfile) | |
3181 | return NULL; | |
a73846d8 | 3182 | |
72d0e1cb SG |
3183 | return strdup(c->configfile); |
3184 | } | |
3185 | ||
2a59a681 SH |
3186 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3187 | { | |
3188 | if (!c || !c->config_path) | |
3189 | return NULL; | |
a73846d8 | 3190 | |
2a59a681 SH |
3191 | return (const char *)(c->config_path); |
3192 | } | |
3193 | ||
afeecbba SH |
3194 | /* |
3195 | * not for export | |
3196 | * Just recalculate the c->configfile based on the | |
3197 | * c->config_path, which must be set. | |
3198 | * The lxc_container must be locked or not yet public. | |
3199 | */ | |
3200 | static bool set_config_filename(struct lxc_container *c) | |
3201 | { | |
3202 | char *newpath; | |
3203 | int len, ret; | |
3204 | ||
3205 | if (!c->config_path) | |
3206 | return false; | |
3207 | ||
3208 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3209 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3210 | newpath = malloc(len); | |
3211 | if (!newpath) | |
3212 | return false; | |
3213 | ||
3214 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3215 | if (ret < 0 || ret >= len) { | |
3216 | fprintf(stderr, "Error printing out config file name\n"); | |
3217 | free(newpath); | |
3218 | return false; | |
3219 | } | |
3220 | ||
f10fad2f | 3221 | free(c->configfile); |
afeecbba SH |
3222 | c->configfile = newpath; |
3223 | ||
3224 | return true; | |
3225 | } | |
3226 | ||
858377e4 | 3227 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3228 | { |
3229 | char *p; | |
3230 | bool b = false; | |
afeecbba | 3231 | char *oldpath = NULL; |
2a59a681 SH |
3232 | |
3233 | if (!c) | |
3234 | return b; | |
3235 | ||
5cee8c50 | 3236 | if (container_mem_lock(c)) |
2a59a681 SH |
3237 | return b; |
3238 | ||
3239 | p = strdup(path); | |
afeecbba SH |
3240 | if (!p) { |
3241 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3242 | goto err; |
afeecbba SH |
3243 | } |
3244 | ||
2a59a681 SH |
3245 | b = true; |
3246 | if (c->config_path) | |
afeecbba | 3247 | oldpath = c->config_path; |
2a59a681 | 3248 | c->config_path = p; |
afeecbba SH |
3249 | |
3250 | /* Since we've changed the config path, we have to change the | |
3251 | * config file name too */ | |
3252 | if (!set_config_filename(c)) { | |
3253 | ERROR("Out of memory setting new config filename"); | |
3254 | b = false; | |
3255 | free(c->config_path); | |
3256 | c->config_path = oldpath; | |
3257 | oldpath = NULL; | |
3258 | } | |
a73846d8 | 3259 | |
2a59a681 | 3260 | err: |
f10fad2f | 3261 | free(oldpath); |
5cee8c50 | 3262 | container_mem_unlock(c); |
2a59a681 SH |
3263 | return b; |
3264 | } | |
3265 | ||
858377e4 | 3266 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3267 | |
858377e4 | 3268 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3269 | { |
3270 | int ret; | |
2202afc9 | 3271 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3272 | |
3273 | if (!c) | |
3274 | return false; | |
3275 | ||
3bc449ed | 3276 | if (is_stopped(c)) |
794dd120 SH |
3277 | return false; |
3278 | ||
5a087e05 | 3279 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3280 | if (!cgroup_ops) |
3281 | return false; | |
3282 | ||
2202afc9 | 3283 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed | 3284 | |
2202afc9 CB |
3285 | cgroup_exit(cgroup_ops); |
3286 | ||
3bc449ed | 3287 | return ret == 0; |
794dd120 SH |
3288 | } |
3289 | ||
858377e4 SH |
3290 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3291 | ||
3292 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3293 | { |
3bc449ed | 3294 | int ret; |
2202afc9 | 3295 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3296 | |
6502006a | 3297 | if (!c) |
794dd120 SH |
3298 | return -1; |
3299 | ||
3bc449ed | 3300 | if (is_stopped(c)) |
794dd120 SH |
3301 | return -1; |
3302 | ||
5a087e05 | 3303 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3304 | if (!cgroup_ops) |
3305 | return -1; | |
3306 | ||
2202afc9 CB |
3307 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3308 | c->config_path); | |
2202afc9 CB |
3309 | |
3310 | cgroup_exit(cgroup_ops); | |
3311 | ||
794dd120 SH |
3312 | return ret; |
3313 | } | |
3314 | ||
858377e4 SH |
3315 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3316 | ||
593e8478 | 3317 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3318 | { |
593e8478 | 3319 | return lxc_global_config_value(key); |
a8428dfa SH |
3320 | } |
3321 | ||
b6b918a1 SG |
3322 | const char *lxc_get_version(void) |
3323 | { | |
95ee490b | 3324 | return LXC_VERSION; |
b6b918a1 SG |
3325 | } |
3326 | ||
f0ca2726 | 3327 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3328 | { |
3329 | int in, out; | |
3330 | ssize_t len, ret; | |
3331 | char buf[8096]; | |
3332 | struct stat sbuf; | |
3333 | ||
3334 | if (file_exists(new)) { | |
3335 | ERROR("copy destination %s exists", new); | |
3336 | return -1; | |
3337 | } | |
a73846d8 | 3338 | |
9be53773 SH |
3339 | ret = stat(old, &sbuf); |
3340 | if (ret < 0) { | |
dfb31b25 | 3341 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3342 | return -1; |
3343 | } | |
3344 | ||
3345 | in = open(old, O_RDONLY); | |
3346 | if (in < 0) { | |
dfb31b25 | 3347 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3348 | return -1; |
3349 | } | |
a73846d8 | 3350 | |
9be53773 SH |
3351 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3352 | if (out < 0) { | |
dfb31b25 | 3353 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3354 | close(in); |
3355 | return -1; | |
3356 | } | |
3357 | ||
3358 | while (1) { | |
3e1e9db8 | 3359 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3360 | if (len < 0) { |
dfb31b25 | 3361 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3362 | goto err; |
3363 | } | |
a73846d8 | 3364 | |
9be53773 SH |
3365 | if (len == 0) |
3366 | break; | |
a73846d8 | 3367 | |
2a2a676d | 3368 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3369 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3370 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3371 | goto err; |
3372 | } | |
3373 | } | |
a73846d8 | 3374 | |
9be53773 SH |
3375 | close(in); |
3376 | close(out); | |
3377 | ||
1a0e70ac | 3378 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3379 | ret = chmod(new, sbuf.st_mode); |
3380 | if (ret) { | |
dfb31b25 | 3381 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3382 | return -1; |
3383 | } | |
3384 | ||
3385 | return 0; | |
3386 | ||
3387 | err: | |
3388 | close(in); | |
3389 | close(out); | |
3390 | return -1; | |
3391 | } | |
3392 | ||
9be53773 SH |
3393 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3394 | { | |
619256b5 | 3395 | int i, len, ret; |
9be53773 | 3396 | struct lxc_list *it; |
619256b5 ÇO |
3397 | char *cpath; |
3398 | ||
3399 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
3400 | cpath = alloca(len); | |
3401 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); | |
3402 | if (ret < 0 || ret >= len) | |
3403 | return -1; | |
9be53773 SH |
3404 | |
3405 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3406 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3407 | char *hookname = it->elem; | |
c32981c3 | 3408 | char *fname = strrchr(hookname, '/'); |
9be53773 | 3409 | char tmppath[MAXPATHLEN]; |
1a0e70ac | 3410 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3411 | return 0; |
a73846d8 | 3412 | |
619256b5 | 3413 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3414 | /* this hook is public - ignore */ |
619256b5 ÇO |
3415 | continue; |
3416 | } | |
a73846d8 | 3417 | |
1a0e70ac | 3418 | /* copy the script, and change the entry in confile */ |
9be53773 SH |
3419 | ret = snprintf(tmppath, MAXPATHLEN, "%s/%s/%s", |
3420 | c->config_path, c->name, fname+1); | |
3421 | if (ret < 0 || ret >= MAXPATHLEN) | |
3422 | return -1; | |
a73846d8 | 3423 | |
9be53773 SH |
3424 | ret = copy_file(it->elem, tmppath); |
3425 | if (ret < 0) | |
3426 | return -1; | |
a73846d8 | 3427 | |
9be53773 | 3428 | free(it->elem); |
a73846d8 | 3429 | |
9be53773 SH |
3430 | it->elem = strdup(tmppath); |
3431 | if (!it->elem) { | |
3432 | ERROR("out of memory copying hook path"); | |
3433 | return -1; | |
3434 | } | |
9be53773 SH |
3435 | } |
3436 | } | |
3437 | ||
67702c21 SH |
3438 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3439 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3440 | ERROR("Error saving new hooks in clone"); |
3441 | return -1; | |
3442 | } | |
a73846d8 | 3443 | |
858377e4 | 3444 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3445 | return 0; |
3446 | } | |
3447 | ||
9be53773 SH |
3448 | |
3449 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3450 | { | |
3451 | char newpath[MAXPATHLEN]; | |
3452 | char *oldpath = oldc->lxc_conf->fstab; | |
3453 | int ret; | |
3454 | ||
3455 | if (!oldpath) | |
3456 | return 0; | |
3457 | ||
47148e96 CB |
3458 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3459 | ||
c32981c3 | 3460 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3461 | if (!p) |
3462 | return -1; | |
a73846d8 | 3463 | |
9be53773 SH |
3464 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s%s", |
3465 | c->config_path, c->name, p); | |
3466 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3467 | ERROR("error printing new path for %s", oldpath); | |
3468 | return -1; | |
3469 | } | |
a73846d8 | 3470 | |
9be53773 SH |
3471 | if (file_exists(newpath)) { |
3472 | ERROR("error: fstab file %s exists", newpath); | |
3473 | return -1; | |
3474 | } | |
3475 | ||
3476 | if (copy_file(oldpath, newpath) < 0) { | |
3477 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3478 | return -1; | |
3479 | } | |
a73846d8 | 3480 | |
9be53773 | 3481 | free(c->lxc_conf->fstab); |
a73846d8 | 3482 | |
9be53773 SH |
3483 | c->lxc_conf->fstab = strdup(newpath); |
3484 | if (!c->lxc_conf->fstab) { | |
3485 | ERROR("error: allocating pathname"); | |
3486 | return -1; | |
3487 | } | |
a73846d8 | 3488 | |
47148e96 | 3489 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3490 | ERROR("error saving new lxctab"); |
3491 | return -1; | |
3492 | } | |
9be53773 SH |
3493 | |
3494 | return 0; | |
3495 | } | |
3496 | ||
dfb31b25 SH |
3497 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3498 | { | |
3499 | char path0[MAXPATHLEN], path1[MAXPATHLEN]; | |
3500 | int ret; | |
3501 | ||
3502 | ret = snprintf(path0, MAXPATHLEN, "%s/%s/lxc_rdepends", c0->config_path, | |
3503 | c0->name); | |
3504 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3505 | WARN("Error copying reverse dependencies"); | |
3506 | return; | |
3507 | } | |
a73846d8 | 3508 | |
dfb31b25 SH |
3509 | ret = snprintf(path1, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, |
3510 | c->name); | |
3511 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3512 | WARN("Error copying reverse dependencies"); | |
3513 | return; | |
3514 | } | |
a73846d8 | 3515 | |
dfb31b25 SH |
3516 | if (copy_file(path0, path1) < 0) { |
3517 | INFO("Error copying reverse dependencies"); | |
3518 | return; | |
3519 | } | |
3520 | } | |
3521 | ||
3522 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3523 | { | |
3524 | int ret; | |
3525 | char path[MAXPATHLEN]; | |
3526 | FILE *f; | |
3527 | bool bret; | |
3528 | ||
3529 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
3530 | c->name); | |
3531 | if (ret < 0 || ret >= MAXPATHLEN) | |
3532 | return false; | |
a73846d8 | 3533 | |
dfb31b25 SH |
3534 | f = fopen(path, "a"); |
3535 | if (!f) | |
3536 | return false; | |
a73846d8 | 3537 | |
dfb31b25 | 3538 | bret = true; |
a73846d8 | 3539 | |
1a0e70ac | 3540 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3541 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3542 | bret = false; | |
a73846d8 | 3543 | |
dfb31b25 SH |
3544 | if (fclose(f) != 0) |
3545 | bret = false; | |
a73846d8 | 3546 | |
dfb31b25 SH |
3547 | return bret; |
3548 | } | |
3549 | ||
15a90a10 SH |
3550 | /* |
3551 | * If the fs natively supports snapshot clones with no penalty, | |
3552 | * then default to those even if not requested. | |
3553 | * Currently we only do this for btrfs. | |
3554 | */ | |
3555 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3556 | struct lxc_container *c1) | |
3557 | { | |
2afdc31f | 3558 | int ret; |
15a90a10 SH |
3559 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3560 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
3561 | char *p0 = alloca(l0 + 1); | |
3562 | char *p1 = alloca(l1 + 1); | |
6e0fa6a0 | 3563 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3564 | |
2afdc31f CB |
3565 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3566 | if (ret < 0 || ret >= l0) | |
3567 | return false; | |
3568 | ||
3569 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3570 | if (ret < 0 || ret >= l1) | |
3571 | return false; | |
9a09badc CB |
3572 | |
3573 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3574 | return false; | |
3575 | ||
6e0fa6a0 CB |
3576 | if (is_btrfs_subvol(rootfs) <= 0) |
3577 | return false; | |
3578 | ||
15a90a10 SH |
3579 | return btrfs_same_fs(p0, p1) == 0; |
3580 | } | |
3581 | ||
9be53773 | 3582 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3583 | const char *newtype, int flags, const char *bdevdata, |
3584 | uint64_t newsize) | |
9be53773 | 3585 | { |
10bc1861 | 3586 | struct lxc_storage *bdev; |
07db51a2 | 3587 | bool need_rdep; |
9be53773 | 3588 | |
15a90a10 SH |
3589 | if (should_default_to_snapshot(c0, c)) |
3590 | flags |= LXC_CLONE_SNAPSHOT; | |
3591 | ||
10bc1861 CB |
3592 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3593 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3594 | if (!bdev) { |
763429b6 | 3595 | ERROR("Error copying storage."); |
9be53773 SH |
3596 | return -1; |
3597 | } | |
763429b6 CB |
3598 | |
3599 | /* Set new rootfs. */ | |
9be53773 SH |
3600 | free(c->lxc_conf->rootfs.path); |
3601 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3602 | storage_put(bdev); |
763429b6 | 3603 | |
dfb31b25 | 3604 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3605 | ERROR("Out of memory while setting storage path."); |
3606 | return -1; | |
3607 | } | |
763429b6 | 3608 | |
7a96a068 CB |
3609 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3610 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3611 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3612 | c->lxc_conf->rootfs.path)) { |
3613 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3614 | return -1; |
3615 | } | |
763429b6 | 3616 | |
eee59f94 SH |
3617 | if (flags & LXC_CLONE_SNAPSHOT) |
3618 | copy_rdepends(c, c0); | |
a73846d8 | 3619 | |
dfb31b25 SH |
3620 | if (need_rdep) { |
3621 | if (!add_rdepends(c, c0)) | |
3622 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3623 | c->name, c0->name); |
dfb31b25 SH |
3624 | } |
3625 | ||
3626 | mod_all_rdeps(c, true); | |
3627 | ||
9be53773 SH |
3628 | return 0; |
3629 | } | |
3630 | ||
1354955b SH |
3631 | struct clone_update_data { |
3632 | struct lxc_container *c0; | |
3633 | struct lxc_container *c1; | |
3634 | int flags; | |
3635 | char **hookargs; | |
3636 | }; | |
3637 | ||
3638 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3639 | { |
1354955b SH |
3640 | struct lxc_container *c0 = data->c0; |
3641 | struct lxc_container *c = data->c1; | |
3642 | int flags = data->flags; | |
3643 | char **hookargs = data->hookargs; | |
9be53773 SH |
3644 | int ret = -1; |
3645 | char path[MAXPATHLEN]; | |
10bc1861 | 3646 | struct lxc_storage *bdev; |
9be53773 | 3647 | FILE *fout; |
148e91f5 | 3648 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3649 | |
3650 | /* update hostname in rootfs */ | |
3651 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3652 | ||
1354955b SH |
3653 | if (setgid(0) < 0) { |
3654 | ERROR("Failed to setgid to 0"); | |
3655 | return -1; | |
3656 | } | |
a73846d8 | 3657 | |
1354955b SH |
3658 | if (setuid(0) < 0) { |
3659 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3660 | return -1; |
1354955b | 3661 | } |
a73846d8 | 3662 | |
c476bdce SH |
3663 | if (setgroups(0, NULL) < 0) |
3664 | WARN("Failed to clear groups"); | |
9be53773 | 3665 | |
1354955b SH |
3666 | if (unshare(CLONE_NEWNS) < 0) |
3667 | return -1; | |
a73846d8 | 3668 | |
8a388ed4 | 3669 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3670 | if (!bdev) |
1354955b | 3671 | return -1; |
a73846d8 | 3672 | |
cf3ef16d SH |
3673 | if (strcmp(bdev->type, "dir") != 0) { |
3674 | if (unshare(CLONE_NEWNS) < 0) { | |
3675 | ERROR("error unsharing mounts"); | |
10bc1861 | 3676 | storage_put(bdev); |
1354955b | 3677 | return -1; |
cf3ef16d | 3678 | } |
a73846d8 | 3679 | |
2c6f3fc9 SH |
3680 | if (detect_shared_rootfs()) { |
3681 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3682 | SYSERROR("Failed to make / rslave"); | |
3683 | ERROR("Continuing..."); | |
3684 | } | |
3685 | } | |
a73846d8 | 3686 | |
e7de366c | 3687 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3688 | storage_put(bdev); |
1354955b | 3689 | return -1; |
e7de366c | 3690 | } |
1a0e70ac | 3691 | } else { /* TODO come up with a better way */ |
f10fad2f | 3692 | free(bdev->dest); |
cf3ef16d SH |
3693 | bdev->dest = strdup(bdev->src); |
3694 | } | |
148e91f5 SH |
3695 | |
3696 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3697 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3698 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3699 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3700 | |
3701 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3702 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3703 | |
3704 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3705 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3706 | |
3707 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3708 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3709 | |
3710 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3711 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3712 | |
14a7b0f9 | 3713 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3714 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3715 | storage_put(bdev); |
1354955b | 3716 | return -1; |
148e91f5 SH |
3717 | } |
3718 | } | |
3719 | ||
3720 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
3721 | ret = snprintf(path, MAXPATHLEN, "%s/etc/hostname", bdev->dest); | |
10bc1861 | 3722 | storage_put(bdev); |
e7de366c | 3723 | |
148e91f5 | 3724 | if (ret < 0 || ret >= MAXPATHLEN) |
1354955b | 3725 | return -1; |
a73846d8 | 3726 | |
8058be39 | 3727 | if (!file_exists(path)) |
1354955b | 3728 | return 0; |
a73846d8 | 3729 | |
148e91f5 | 3730 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3731 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3732 | return 0; |
148e91f5 | 3733 | } |
a73846d8 | 3734 | |
a684f0b7 ÇO |
3735 | if (fprintf(fout, "%s", c->name) < 0) { |
3736 | fclose(fout); | |
1354955b | 3737 | return -1; |
6849cb5b | 3738 | } |
a73846d8 | 3739 | |
148e91f5 | 3740 | if (fclose(fout) < 0) |
1354955b | 3741 | return -1; |
10bc1861 CB |
3742 | } else { |
3743 | storage_put(bdev); | |
9be53773 | 3744 | } |
e7de366c | 3745 | |
1354955b SH |
3746 | return 0; |
3747 | } | |
3748 | ||
3749 | static int clone_update_rootfs_wrapper(void *data) | |
3750 | { | |
3751 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3752 | return clone_update_rootfs(arg); | |
9be53773 SH |
3753 | } |
3754 | ||
3755 | /* | |
3756 | * We want to support: | |
3757 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3758 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3759 | ||
ba115175 CB |
3760 | -s [ implies overlay] |
3761 | -s -B overlay | |
9be53773 SH |
3762 | |
3763 | only rootfs gets converted (copied/snapshotted) on clone. | |
3764 | */ | |
3765 | ||
d5752559 | 3766 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3767 | { |
c32981c3 | 3768 | char *p = strrchr(path, '/'); |
d5752559 | 3769 | int ret = -1; |
9be53773 SH |
3770 | |
3771 | if (!p) | |
3772 | return -1; | |
a73846d8 | 3773 | |
9be53773 | 3774 | *p = '\0'; |
d028235d | 3775 | ret = do_create_container_dir(path, conf); |
9be53773 | 3776 | *p = '/'; |
a73846d8 | 3777 | |
9be53773 SH |
3778 | return ret; |
3779 | } | |
3780 | ||
858377e4 | 3781 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3782 | const char *lxcpath, int flags, |
d659597e | 3783 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3784 | char **hookargs) |
9be53773 | 3785 | { |
9be53773 | 3786 | char newpath[MAXPATHLEN]; |
0e1a60b0 | 3787 | int fd, ret; |
1354955b | 3788 | struct clone_update_data data; |
3b392519 | 3789 | size_t saved_unexp_len; |
1354955b | 3790 | pid_t pid; |
17a367d8 CB |
3791 | int storage_copied = 0; |
3792 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3793 | struct lxc_container *c2 = NULL; | |
9be53773 | 3794 | |
858377e4 | 3795 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3796 | return NULL; |
3797 | ||
5cee8c50 | 3798 | if (container_mem_lock(c)) |
9be53773 SH |
3799 | return NULL; |
3800 | ||
39dc698c | 3801 | if (!is_stopped(c)) { |
9be53773 SH |
3802 | ERROR("error: Original container (%s) is running", c->name); |
3803 | goto out; | |
3804 | } | |
3805 | ||
1a0e70ac | 3806 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3807 | if (!newname) |
3808 | newname = c->name; | |
a73846d8 | 3809 | |
05d53f4c | 3810 | if (!lxcpath) |
858377e4 | 3811 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3812 | |
05d53f4c | 3813 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/config", lxcpath, newname); |
6849cb5b | 3814 | if (ret < 0 || ret >= MAXPATHLEN) { |
9be53773 SH |
3815 | SYSERROR("clone: failed making config pathname"); |
3816 | goto out; | |
3817 | } | |
17a367d8 | 3818 | |
9be53773 SH |
3819 | if (file_exists(newpath)) { |
3820 | ERROR("error: clone: %s exists", newpath); | |
3821 | goto out; | |
3822 | } | |
3823 | ||
d5752559 | 3824 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3825 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3826 | ERROR("Error creating container dir for %s", newpath); |
3827 | goto out; | |
3828 | } | |
3829 | ||
1a0e70ac | 3830 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3831 | if (c->lxc_conf->rootfs.path) { |
3832 | origroot = c->lxc_conf->rootfs.path; | |
3833 | c->lxc_conf->rootfs.path = NULL; | |
3834 | } | |
0e1a60b0 CB |
3835 | |
3836 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3837 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3838 | if (fd < 0) { |
3839 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3840 | goto out; |
3841 | } | |
5eea90e8 SH |
3842 | |
3843 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3844 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3845 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3846 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3847 | close(fd); |
5eea90e8 SH |
3848 | goto out; |
3849 | } | |
7a96a068 | 3850 | |
7a96a068 | 3851 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3852 | write_config(fd, c->lxc_conf); |
3853 | close(fd); | |
a73846d8 | 3854 | |
8d2efe40 | 3855 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3856 | |
5eea90e8 SH |
3857 | free(c->lxc_conf->unexpanded_config); |
3858 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3859 | saved_unexp_conf = NULL; | |
3b392519 | 3860 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3861 | |
90b366fc CB |
3862 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/rootfs", lxcpath, newname); |
3863 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3864 | SYSERROR("clone: failed making rootfs pathname"); | |
3865 | goto out; | |
3866 | } | |
17a367d8 CB |
3867 | |
3868 | ret = mkdir(newpath, 0755); | |
3869 | if (ret < 0) { | |
3870 | /* For an overlay container the rootfs is considered immutable | |
3871 | * and will not have been removed when restoring from a | |
3872 | * snapshot. | |
3873 | */ | |
3874 | if (errno != ENOENT && | |
3875 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3876 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3877 | goto out; | |
3878 | } | |
9be53773 SH |
3879 | } |
3880 | ||
e0010464 | 3881 | if (am_guest_unpriv()) { |
1354955b | 3882 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3883 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3884 | goto out; |
3885 | } | |
3886 | } | |
3887 | ||
05d53f4c | 3888 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3889 | if (!c2) { |
05d53f4c SH |
3890 | ERROR("clone: failed to create new container (%s %s)", newname, |
3891 | lxcpath); | |
9be53773 SH |
3892 | goto out; |
3893 | } | |
8d2efe40 | 3894 | |
1a0e70ac | 3895 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3896 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3897 | if (ret < 0) | |
3898 | goto out; | |
9be53773 | 3899 | |
1a0e70ac | 3900 | /* update utsname */ |
3d7ad474 CB |
3901 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3902 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3903 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3904 | |
0d9cd9c3 | 3905 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3906 | ERROR("Error setting new hostname"); |
3907 | goto out; | |
3908 | } | |
96532523 SH |
3909 | } |
3910 | ||
1a0e70ac | 3911 | /* copy hooks */ |
619256b5 ÇO |
3912 | ret = copyhooks(c, c2); |
3913 | if (ret < 0) { | |
3914 | ERROR("error copying hooks"); | |
3915 | goto out; | |
9be53773 SH |
3916 | } |
3917 | ||
3918 | if (copy_fstab(c, c2) < 0) { | |
3919 | ERROR("error copying fstab"); | |
9be53773 SH |
3920 | goto out; |
3921 | } | |
3922 | ||
1a0e70ac | 3923 | /* update macaddrs */ |
6b0d5538 | 3924 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3925 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3926 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3927 | goto out; |
3928 | } | |
3929 | } | |
9be53773 | 3930 | |
1a0e70ac | 3931 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3932 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3933 | goto out; |
3934 | ||
1a0e70ac CB |
3935 | /* We've now successfully created c2's storage, so clear it out if we |
3936 | * fail after this. | |
3937 | */ | |
176d9acb SH |
3938 | storage_copied = 1; |
3939 | ||
375c2258 | 3940 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3941 | goto out; |
9be53773 | 3942 | |
1354955b SH |
3943 | if ((pid = fork()) < 0) { |
3944 | SYSERROR("fork"); | |
9be53773 | 3945 | goto out; |
1354955b | 3946 | } |
a73846d8 | 3947 | |
1354955b SH |
3948 | if (pid > 0) { |
3949 | ret = wait_for_pid(pid); | |
3950 | if (ret) | |
3951 | goto out; | |
a73846d8 | 3952 | |
1354955b SH |
3953 | container_mem_unlock(c); |
3954 | return c2; | |
3955 | } | |
a73846d8 | 3956 | |
1354955b SH |
3957 | data.c0 = c; |
3958 | data.c1 = c2; | |
3959 | data.flags = flags; | |
3960 | data.hookargs = hookargs; | |
a73846d8 | 3961 | |
e0010464 | 3962 | if (am_guest_unpriv()) |
ee484f7f CB |
3963 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3964 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3965 | else |
3966 | ret = clone_update_rootfs(&data); | |
3967 | if (ret < 0) | |
d8480a31 | 3968 | _exit(EXIT_FAILURE); |
9be53773 | 3969 | |
5cee8c50 | 3970 | container_mem_unlock(c); |
d8480a31 | 3971 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3972 | |
3973 | out: | |
5cee8c50 | 3974 | container_mem_unlock(c); |
375c2258 | 3975 | if (c2) { |
176d9acb SH |
3976 | if (!storage_copied) |
3977 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 3978 | |
375c2258 | 3979 | c2->destroy(c2); |
9be53773 | 3980 | lxc_container_put(c2); |
375c2258 | 3981 | } |
9be53773 SH |
3982 | |
3983 | return NULL; | |
3984 | } | |
3985 | ||
858377e4 SH |
3986 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3987 | const char *lxcpath, int flags, | |
3988 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3989 | char **hookargs) | |
3990 | { | |
3991 | struct lxc_container * ret; | |
a73846d8 | 3992 | |
858377e4 SH |
3993 | current_config = c ? c->lxc_conf : NULL; |
3994 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
3995 | current_config = NULL; | |
a73846d8 | 3996 | |
858377e4 SH |
3997 | return ret; |
3998 | } | |
3999 | ||
4000 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 4001 | { |
10bc1861 | 4002 | struct lxc_storage *bdev; |
06e5650e | 4003 | struct lxc_container *newc; |
06e5650e | 4004 | |
d693cf93 | 4005 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
4006 | return false; |
4007 | ||
18aa217b SH |
4008 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4009 | ERROR("Renaming a container with snapshots is not supported"); | |
4010 | return false; | |
4011 | } | |
a73846d8 | 4012 | |
8a388ed4 | 4013 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4014 | if (!bdev) { |
4015 | ERROR("Failed to find original backing store type"); | |
4016 | return false; | |
4017 | } | |
4018 | ||
619256b5 | 4019 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4020 | storage_put(bdev); |
06e5650e ÇO |
4021 | if (!newc) { |
4022 | lxc_container_put(newc); | |
4023 | return false; | |
4024 | } | |
4025 | ||
4026 | if (newc && lxcapi_is_defined(newc)) | |
4027 | lxc_container_put(newc); | |
4028 | ||
17a367d8 | 4029 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4030 | ERROR("Could not destroy existing container %s", c->name); |
4031 | return false; | |
4032 | } | |
a73846d8 | 4033 | |
06e5650e ÇO |
4034 | return true; |
4035 | } | |
4036 | ||
858377e4 SH |
4037 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4038 | ||
a0e93eeb CS |
4039 | 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) |
4040 | { | |
858377e4 SH |
4041 | int ret; |
4042 | ||
a0e93eeb CS |
4043 | if (!c) |
4044 | return -1; | |
4045 | ||
858377e4 SH |
4046 | current_config = c->lxc_conf; |
4047 | ||
4048 | ret = lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
4049 | current_config = NULL; | |
4050 | return ret; | |
a0e93eeb CS |
4051 | } |
4052 | ||
858377e4 | 4053 | 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 |
4054 | { |
4055 | lxc_attach_command_t command; | |
4056 | pid_t pid; | |
4057 | int r; | |
4058 | ||
4059 | if (!c) | |
4060 | return -1; | |
4061 | ||
4062 | command.program = (char*)program; | |
4063 | command.argv = (char**)argv; | |
a73846d8 | 4064 | |
a0e93eeb CS |
4065 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); |
4066 | if (r < 0) { | |
4067 | ERROR("ups"); | |
4068 | return r; | |
4069 | } | |
a73846d8 | 4070 | |
a0e93eeb CS |
4071 | return lxc_wait_for_pid_status(pid); |
4072 | } | |
4073 | ||
858377e4 SH |
4074 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
4075 | { | |
4076 | int ret; | |
a73846d8 | 4077 | |
858377e4 SH |
4078 | current_config = c ? c->lxc_conf : NULL; |
4079 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4080 | current_config = NULL; | |
a73846d8 | 4081 | |
858377e4 SH |
4082 | return ret; |
4083 | } | |
4084 | ||
74a3920a | 4085 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 SH |
4086 | { |
4087 | char *fname; | |
4088 | struct stat sb; | |
4089 | int i = 0, ret; | |
4090 | ||
4091 | fname = alloca(strlen(lxcpath) + 20); | |
a73846d8 | 4092 | |
f5dd1d53 SH |
4093 | while (1) { |
4094 | sprintf(fname, "%s/snap%d", lxcpath, i); | |
a73846d8 | 4095 | |
f5dd1d53 SH |
4096 | ret = stat(fname, &sb); |
4097 | if (ret != 0) | |
4098 | return i; | |
a73846d8 | 4099 | |
f5dd1d53 SH |
4100 | i++; |
4101 | } | |
4102 | } | |
4103 | ||
18aa217b SH |
4104 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4105 | { | |
4106 | int ret; | |
a73846d8 | 4107 | |
18aa217b SH |
4108 | /* |
4109 | * If the old style snapshot path exists, use it | |
4110 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4111 | */ | |
4112 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps", c->config_path); | |
4113 | if (ret < 0 || ret >= MAXPATHLEN) | |
4114 | return false; | |
a73846d8 | 4115 | |
18aa217b SH |
4116 | if (dir_exists(snappath)) { |
4117 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps/%s", c->config_path, c->name); | |
4118 | if (ret < 0 || ret >= MAXPATHLEN) | |
4119 | return false; | |
a73846d8 | 4120 | |
18aa217b SH |
4121 | return true; |
4122 | } | |
4123 | ||
4124 | /* | |
4125 | * Use the new style path | |
4126 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4127 | */ | |
4128 | ret = snprintf(snappath, MAXPATHLEN, "%s/%s/snaps", c->config_path, c->name); | |
4129 | if (ret < 0 || ret >= MAXPATHLEN) | |
4130 | return false; | |
a73846d8 | 4131 | |
18aa217b SH |
4132 | return true; |
4133 | } | |
4134 | ||
858377e4 | 4135 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 SH |
4136 | { |
4137 | int i, flags, ret; | |
df05fa0f | 4138 | time_t timer; |
4139 | struct tm tm_info; | |
f5dd1d53 SH |
4140 | struct lxc_container *c2; |
4141 | char snappath[MAXPATHLEN], newname[20]; | |
df05fa0f | 4142 | char buffer[25]; |
4143 | FILE *f; | |
f5dd1d53 | 4144 | |
840f05df SH |
4145 | if (!c || !lxcapi_is_defined(c)) |
4146 | return -1; | |
4147 | ||
10bc1861 | 4148 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4149 | ERROR("%s's backing store cannot be backed up", c->name); |
4150 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4151 | return -1; |
4152 | } | |
4153 | ||
18aa217b | 4154 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4155 | return -1; |
18aa217b | 4156 | |
f5dd1d53 SH |
4157 | i = get_next_index(snappath, c->name); |
4158 | ||
4159 | if (mkdir_p(snappath, 0755) < 0) { | |
4160 | ERROR("Failed to create snapshot directory %s", snappath); | |
4161 | return -1; | |
4162 | } | |
4163 | ||
4164 | ret = snprintf(newname, 20, "snap%d", i); | |
4165 | if (ret < 0 || ret >= 20) | |
4166 | return -1; | |
4167 | ||
0a83cbbb SH |
4168 | /* |
4169 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4170 | * created in the original container | |
4171 | */ | |
4172 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4173 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4174 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4175 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4176 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4177 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4178 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4179 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4180 | } | |
a73846d8 | 4181 | |
858377e4 | 4182 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4183 | if (!c2) { |
df05fa0f | 4184 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4185 | return -1; |
4186 | } | |
4187 | ||
4188 | lxc_container_put(c2); | |
4189 | ||
1a0e70ac | 4190 | /* Now write down the creation time. */ |
f5dd1d53 | 4191 | time(&timer); |
f5dd1d53 | 4192 | |
df05fa0f | 4193 | if (!localtime_r(&timer, &tm_info)) { |
4194 | ERROR("Failed to get localtime"); | |
4195 | return -1; | |
4196 | } | |
4197 | ||
4198 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 SH |
4199 | |
4200 | char *dfnam = alloca(strlen(snappath) + strlen(newname) + 5); | |
4201 | sprintf(dfnam, "%s/%s/ts", snappath, newname); | |
025ed0f3 | 4202 | f = fopen(dfnam, "w"); |
f5dd1d53 | 4203 | if (!f) { |
959aee9c | 4204 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4205 | return -1; |
4206 | } | |
a73846d8 | 4207 | |
f5dd1d53 SH |
4208 | if (fprintf(f, "%s", buffer) < 0) { |
4209 | SYSERROR("Writing timestamp"); | |
4210 | fclose(f); | |
4211 | return -1; | |
4212 | } | |
a73846d8 | 4213 | |
025ed0f3 | 4214 | ret = fclose(f); |
025ed0f3 | 4215 | if (ret != 0) { |
f5dd1d53 SH |
4216 | SYSERROR("Writing timestamp"); |
4217 | return -1; | |
4218 | } | |
4219 | ||
4220 | if (commentfile) { | |
1a0e70ac | 4221 | /* $p / $name / comment \0 */ |
f5dd1d53 SH |
4222 | int len = strlen(snappath) + strlen(newname) + 10; |
4223 | char *path = alloca(len); | |
a73846d8 | 4224 | |
f5dd1d53 SH |
4225 | sprintf(path, "%s/%s/comment", snappath, newname); |
4226 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4227 | } | |
4228 | ||
4229 | return i; | |
4230 | } | |
4231 | ||
858377e4 SH |
4232 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4233 | ||
f5dd1d53 SH |
4234 | static void lxcsnap_free(struct lxc_snapshot *s) |
4235 | { | |
f10fad2f ME |
4236 | free(s->name); |
4237 | free(s->comment_pathname); | |
4238 | free(s->timestamp); | |
4239 | free(s->lxcpath); | |
f5dd1d53 SH |
4240 | } |
4241 | ||
4242 | static char *get_snapcomment_path(char* snappath, char *name) | |
4243 | { | |
1a0e70ac | 4244 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4245 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4246 | char *s = malloc(len); | |
4247 | ||
4248 | if (s) { | |
4249 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4250 | if (ret < 0 || ret >= len) { | |
4251 | free(s); | |
4252 | s = NULL; | |
4253 | } | |
4254 | } | |
a73846d8 | 4255 | |
f5dd1d53 SH |
4256 | return s; |
4257 | } | |
4258 | ||
4259 | static char *get_timestamp(char* snappath, char *name) | |
4260 | { | |
4261 | char path[MAXPATHLEN], *s = NULL; | |
4262 | int ret, len; | |
4263 | FILE *fin; | |
4264 | ||
4265 | ret = snprintf(path, MAXPATHLEN, "%s/%s/ts", snappath, name); | |
4266 | if (ret < 0 || ret >= MAXPATHLEN) | |
4267 | return NULL; | |
a73846d8 | 4268 | |
025ed0f3 | 4269 | fin = fopen(path, "r"); |
025ed0f3 | 4270 | if (!fin) |
f5dd1d53 | 4271 | return NULL; |
a73846d8 | 4272 | |
f5dd1d53 SH |
4273 | (void) fseek(fin, 0, SEEK_END); |
4274 | len = ftell(fin); | |
4275 | (void) fseek(fin, 0, SEEK_SET); | |
4276 | if (len > 0) { | |
4277 | s = malloc(len+1); | |
4278 | if (s) { | |
4279 | s[len] = '\0'; | |
4280 | if (fread(s, 1, len, fin) != len) { | |
4281 | SYSERROR("reading timestamp"); | |
4282 | free(s); | |
4283 | s = NULL; | |
4284 | } | |
4285 | } | |
4286 | } | |
a73846d8 | 4287 | |
f5dd1d53 SH |
4288 | fclose(fin); |
4289 | return s; | |
4290 | } | |
4291 | ||
858377e4 | 4292 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 SH |
4293 | { |
4294 | char snappath[MAXPATHLEN], path2[MAXPATHLEN]; | |
18aa217b | 4295 | int count = 0, ret; |
74f96976 | 4296 | struct dirent *direntp; |
f5dd1d53 SH |
4297 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4298 | DIR *dir; | |
4299 | ||
4300 | if (!c || !lxcapi_is_defined(c)) | |
4301 | return -1; | |
c868b261 | 4302 | |
18aa217b | 4303 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4304 | ERROR("path name too long"); |
4305 | return -1; | |
4306 | } | |
a73846d8 | 4307 | |
025ed0f3 | 4308 | dir = opendir(snappath); |
025ed0f3 | 4309 | if (!dir) { |
a73846d8 | 4310 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4311 | return 0; |
4312 | } | |
4313 | ||
74f96976 | 4314 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4315 | if (!strcmp(direntp->d_name, ".")) |
4316 | continue; | |
4317 | ||
4318 | if (!strcmp(direntp->d_name, "..")) | |
4319 | continue; | |
4320 | ||
4321 | ret = snprintf(path2, MAXPATHLEN, "%s/%s/config", snappath, direntp->d_name); | |
4322 | if (ret < 0 || ret >= MAXPATHLEN) { | |
4323 | ERROR("pathname too long"); | |
4324 | goto out_free; | |
4325 | } | |
a73846d8 | 4326 | |
f5dd1d53 SH |
4327 | if (!file_exists(path2)) |
4328 | continue; | |
a73846d8 | 4329 | |
f5dd1d53 SH |
4330 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4331 | if (!nsnaps) { | |
4332 | SYSERROR("Out of memory"); | |
4333 | goto out_free; | |
4334 | } | |
a73846d8 | 4335 | |
f5dd1d53 SH |
4336 | snaps = nsnaps; |
4337 | snaps[count].free = lxcsnap_free; | |
4338 | snaps[count].name = strdup(direntp->d_name); | |
4339 | if (!snaps[count].name) | |
4340 | goto out_free; | |
a73846d8 | 4341 | |
f5dd1d53 SH |
4342 | snaps[count].lxcpath = strdup(snappath); |
4343 | if (!snaps[count].lxcpath) { | |
4344 | free(snaps[count].name); | |
4345 | goto out_free; | |
4346 | } | |
a73846d8 | 4347 | |
f5dd1d53 SH |
4348 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4349 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4350 | count++; | |
4351 | } | |
4352 | ||
4353 | if (closedir(dir)) | |
a73846d8 | 4354 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4355 | |
4356 | *ret_snaps = snaps; | |
4357 | return count; | |
4358 | ||
4359 | out_free: | |
4360 | if (snaps) { | |
4361 | int i; | |
a73846d8 | 4362 | |
f5dd1d53 SH |
4363 | for (i=0; i<count; i++) |
4364 | lxcsnap_free(&snaps[i]); | |
a73846d8 | 4365 | |
f5dd1d53 SH |
4366 | free(snaps); |
4367 | } | |
a73846d8 | 4368 | |
9baa57bd | 4369 | if (closedir(dir)) |
a73846d8 | 4370 | WARN("Failed to close directory"); |
4371 | ||
f5dd1d53 SH |
4372 | return -1; |
4373 | } | |
4374 | ||
858377e4 SH |
4375 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4376 | ||
4377 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 SH |
4378 | { |
4379 | char clonelxcpath[MAXPATHLEN]; | |
18aa217b | 4380 | int flags = 0; |
f5dd1d53 | 4381 | struct lxc_container *snap, *rest; |
10bc1861 | 4382 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4383 | bool b = false; |
4384 | ||
4385 | if (!c || !c->name || !c->config_path) | |
4386 | return false; | |
4387 | ||
18aa217b SH |
4388 | if (has_fs_snapshots(c)) { |
4389 | ERROR("container rootfs has dependent snapshots"); | |
4390 | return false; | |
4391 | } | |
4392 | ||
8a388ed4 | 4393 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4394 | if (!bdev) { |
4395 | ERROR("Failed to find original backing store type"); | |
4396 | return false; | |
4397 | } | |
4398 | ||
17a367d8 CB |
4399 | /* For an overlay container the rootfs is considered immutable |
4400 | * and cannot be removed when restoring from a snapshot. We pass this | |
4401 | * internal flag along to communicate this to various parts of the | |
4402 | * codebase. | |
4403 | */ | |
4404 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4405 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4406 | ||
f5dd1d53 SH |
4407 | if (!newname) |
4408 | newname = c->name; | |
7e36f87e | 4409 | |
18aa217b | 4410 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4411 | storage_put(bdev); |
f5dd1d53 SH |
4412 | return false; |
4413 | } | |
1a0e70ac | 4414 | /* how should we lock this? */ |
f5dd1d53 SH |
4415 | |
4416 | snap = lxc_container_new(snapname, clonelxcpath); | |
4417 | if (!snap || !lxcapi_is_defined(snap)) { | |
4418 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4419 | |
17a367d8 CB |
4420 | if (snap) |
4421 | lxc_container_put(snap); | |
a73846d8 | 4422 | |
10bc1861 | 4423 | storage_put(bdev); |
f5dd1d53 SH |
4424 | return false; |
4425 | } | |
4426 | ||
17a367d8 CB |
4427 | if (!strcmp(c->name, newname)) { |
4428 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4429 | ERROR("Could not destroy existing container %s", newname); |
4430 | lxc_container_put(snap); | |
10bc1861 | 4431 | storage_put(bdev); |
7e36f87e ÇO |
4432 | return false; |
4433 | } | |
4434 | } | |
4435 | ||
de269ee8 SH |
4436 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4437 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4438 | |
4439 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4440 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4441 | |
09f6f8c4 CB |
4442 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4443 | NULL, 0, NULL); | |
10bc1861 | 4444 | storage_put(bdev); |
f5dd1d53 SH |
4445 | if (rest && lxcapi_is_defined(rest)) |
4446 | b = true; | |
a73846d8 | 4447 | |
f5dd1d53 SH |
4448 | if (rest) |
4449 | lxc_container_put(rest); | |
17a367d8 | 4450 | |
f5dd1d53 SH |
4451 | lxc_container_put(snap); |
4452 | return b; | |
4453 | } | |
4454 | ||
858377e4 SH |
4455 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4456 | ||
18aa217b | 4457 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4458 | { |
771d96b3 | 4459 | struct lxc_container *snap = NULL; |
18aa217b | 4460 | bool bret = false; |
771d96b3 ÇO |
4461 | |
4462 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4463 | if (!snap) { |
771d96b3 ÇO |
4464 | ERROR("Could not find snapshot %s", snapname); |
4465 | goto err; | |
4466 | } | |
4467 | ||
858377e4 | 4468 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4469 | ERROR("Could not destroy snapshot %s", snapname); |
4470 | goto err; | |
4471 | } | |
a73846d8 | 4472 | |
18aa217b | 4473 | bret = true; |
771d96b3 | 4474 | |
771d96b3 ÇO |
4475 | err: |
4476 | if (snap) | |
4477 | lxc_container_put(snap); | |
a73846d8 | 4478 | |
18aa217b SH |
4479 | return bret; |
4480 | } | |
4481 | ||
4482 | static bool remove_all_snapshots(const char *path) | |
4483 | { | |
4484 | DIR *dir; | |
74f96976 | 4485 | struct dirent *direntp; |
18aa217b SH |
4486 | bool bret = true; |
4487 | ||
4488 | dir = opendir(path); | |
4489 | if (!dir) { | |
4490 | SYSERROR("opendir on snapshot path %s", path); | |
4491 | return false; | |
4492 | } | |
a73846d8 | 4493 | |
74f96976 | 4494 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4495 | if (!strcmp(direntp->d_name, ".")) |
4496 | continue; | |
a73846d8 | 4497 | |
18aa217b SH |
4498 | if (!strcmp(direntp->d_name, "..")) |
4499 | continue; | |
a73846d8 | 4500 | |
18aa217b SH |
4501 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4502 | bret = false; | |
4503 | continue; | |
4504 | } | |
4505 | } | |
4506 | ||
4507 | closedir(dir); | |
4508 | ||
4509 | if (rmdir(path)) | |
4510 | SYSERROR("Error removing directory %s", path); | |
4511 | ||
4512 | return bret; | |
4513 | } | |
4514 | ||
858377e4 | 4515 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b SH |
4516 | { |
4517 | char clonelxcpath[MAXPATHLEN]; | |
4518 | ||
4519 | if (!c || !c->name || !c->config_path || !snapname) | |
4520 | return false; | |
4521 | ||
4522 | if (!get_snappath_dir(c, clonelxcpath)) | |
4523 | return false; | |
4524 | ||
4525 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4526 | } | |
4527 | ||
858377e4 SH |
4528 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4529 | ||
4530 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b SH |
4531 | { |
4532 | char clonelxcpath[MAXPATHLEN]; | |
4533 | ||
4534 | if (!c || !c->name || !c->config_path) | |
4535 | return false; | |
4536 | ||
4537 | if (!get_snappath_dir(c, clonelxcpath)) | |
4538 | return false; | |
4539 | ||
4540 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4541 | } |
4542 | ||
858377e4 SH |
4543 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4544 | ||
4545 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4546 | { |
5106ecd0 | 4547 | if (!c) |
4548 | return false; | |
4549 | ||
b494d2dd SH |
4550 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4551 | } | |
4552 | ||
858377e4 SH |
4553 | WRAP_API(bool, lxcapi_may_control) |
4554 | ||
d5aa23e6 | 4555 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4556 | struct stat *st) |
d5aa23e6 | 4557 | { |
b69dfc9f CB |
4558 | int ret; |
4559 | char *tmp; | |
4560 | pid_t pid; | |
d5aa23e6 SH |
4561 | char chrootpath[MAXPATHLEN]; |
4562 | char *directory_path = NULL; | |
d5aa23e6 | 4563 | |
b69dfc9f CB |
4564 | pid = fork(); |
4565 | if (pid < 0) { | |
4566 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4567 | return false; |
4568 | } | |
b69dfc9f | 4569 | |
d5aa23e6 | 4570 | if (pid) { |
b69dfc9f CB |
4571 | ret = wait_for_pid(pid); |
4572 | if (ret != 0) { | |
4573 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4574 | return false; |
4575 | } | |
b69dfc9f | 4576 | |
d5aa23e6 SH |
4577 | return true; |
4578 | } | |
4579 | ||
4580 | /* prepare the path */ | |
4581 | ret = snprintf(chrootpath, MAXPATHLEN, "/proc/%d/root", init_pid); | |
4582 | if (ret < 0 || ret >= MAXPATHLEN) | |
4583 | return false; | |
4584 | ||
b69dfc9f CB |
4585 | ret = chroot(chrootpath); |
4586 | if (ret < 0) | |
a7764ce7 | 4587 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4588 | |
4589 | ret = chdir("/"); | |
4590 | if (ret < 0) | |
a7764ce7 | 4591 | _exit(EXIT_FAILURE); |
b69dfc9f | 4592 | |
d5aa23e6 | 4593 | /* remove path if it exists */ |
b69dfc9f CB |
4594 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4595 | if(ret == 0) { | |
4596 | ret = unlink(path); | |
c7d76c09 | 4597 | if (ret < 0) { |
6d1400b5 | 4598 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4599 | _exit(EXIT_FAILURE); |
c7d76c09 | 4600 | } |
d5aa23e6 | 4601 | } |
b69dfc9f | 4602 | |
d5aa23e6 | 4603 | if (!add) |
a7764ce7 | 4604 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4605 | |
4606 | /* create any missing directories */ | |
b69dfc9f CB |
4607 | tmp = strdup(path); |
4608 | if (!tmp) | |
a7764ce7 | 4609 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4610 | |
4611 | directory_path = dirname(tmp); | |
4612 | ret = mkdir_p(directory_path, 0755); | |
4613 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4614 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4615 | free(tmp); |
a7764ce7 | 4616 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4617 | } |
4618 | ||
4619 | /* create the device node */ | |
b69dfc9f CB |
4620 | ret = mknod(path, st->st_mode, st->st_rdev); |
4621 | free(tmp); | |
c7d76c09 | 4622 | if (ret < 0) { |
6d1400b5 | 4623 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4624 | _exit(EXIT_FAILURE); |
c7d76c09 | 4625 | } |
d5aa23e6 | 4626 | |
a7764ce7 | 4627 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4628 | } |
4629 | ||
f0ca2726 | 4630 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4631 | { |
4632 | int ret; | |
4633 | struct stat st; | |
238b3e5e | 4634 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4635 | const char *p; |
a9a0ed90 ÇO |
4636 | |
4637 | /* make sure container is running */ | |
858377e4 | 4638 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4639 | ERROR("container is not running"); |
d5aa23e6 | 4640 | return false; |
a9a0ed90 ÇO |
4641 | } |
4642 | ||
4643 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4644 | p = dest_path ? dest_path : src_path; | |
4645 | ||
a9a0ed90 ÇO |
4646 | /* make sure we can access p */ |
4647 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4648 | return false; |
a9a0ed90 ÇO |
4649 | |
4650 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4651 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4652 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4653 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4654 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4655 | else |
d5aa23e6 | 4656 | return false; |
a9a0ed90 ÇO |
4657 | |
4658 | /* check snprintf return code */ | |
238b3e5e | 4659 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4660 | return false; |
a9a0ed90 | 4661 | |
858377e4 | 4662 | if (!do_add_remove_node(do_lxcapi_init_pid(c), p, add, &st)) |
d5aa23e6 | 4663 | return false; |
a9a0ed90 | 4664 | |
d5aa23e6 | 4665 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4666 | if (add) { |
858377e4 | 4667 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4668 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4669 | return false; |
a9a0ed90 ÇO |
4670 | } |
4671 | } else { | |
858377e4 | 4672 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4673 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4674 | return false; |
a9a0ed90 ÇO |
4675 | } |
4676 | } | |
d5aa23e6 | 4677 | |
a9a0ed90 | 4678 | return true; |
a9a0ed90 ÇO |
4679 | } |
4680 | ||
858377e4 | 4681 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4682 | { |
e0010464 | 4683 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4684 | if (am_host_unpriv()) { |
238b3e5e | 4685 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4686 | return false; |
4687 | } | |
a73846d8 | 4688 | |
a9a0ed90 ÇO |
4689 | return add_remove_device_node(c, src_path, dest_path, true); |
4690 | } | |
4691 | ||
858377e4 SH |
4692 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4693 | ||
4694 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4695 | { |
e0010464 | 4696 | if (am_guest_unpriv()) { |
238b3e5e | 4697 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4698 | return false; |
4699 | } | |
a73846d8 | 4700 | |
a9a0ed90 ÇO |
4701 | return add_remove_device_node(c, src_path, dest_path, false); |
4702 | } | |
4703 | ||
858377e4 SH |
4704 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4705 | ||
c7d76c09 CB |
4706 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4707 | const char *ifname, | |
4708 | const char *dst_ifname) | |
e58fae8f | 4709 | { |
c7d76c09 | 4710 | pid_t init_pid; |
e58fae8f | 4711 | int ret = 0; |
c7d76c09 | 4712 | |
e0010464 | 4713 | if (am_guest_unpriv()) { |
238b3e5e | 4714 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4715 | return false; |
4716 | } | |
4717 | ||
4718 | if (!ifname) { | |
4719 | ERROR("No source interface name given"); | |
4720 | return false; | |
4721 | } | |
4722 | ||
4723 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4724 | if (ret > 0) { |
4725 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4726 | ret = lxc_netdev_down(ifname); |
4727 | if (ret) | |
4728 | goto err; | |
4729 | } | |
4730 | ||
c7d76c09 CB |
4731 | init_pid = do_lxcapi_init_pid(c); |
4732 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); | |
e58fae8f DY |
4733 | if (ret) |
4734 | goto err; | |
4735 | ||
c7d76c09 | 4736 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4737 | return true; |
e5848d39 | 4738 | |
e58fae8f | 4739 | err: |
e58fae8f DY |
4740 | return false; |
4741 | } | |
4742 | ||
858377e4 SH |
4743 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4744 | ||
c7d76c09 CB |
4745 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4746 | const char *ifname, | |
4747 | const char *dst_ifname) | |
e58fae8f | 4748 | { |
c7d76c09 | 4749 | int ret; |
e58fae8f DY |
4750 | pid_t pid, pid_outside; |
4751 | ||
e0010464 SH |
4752 | /* |
4753 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4754 | * But for other types guest privilege suffices. | |
4755 | */ | |
4756 | if (am_guest_unpriv()) { | |
238b3e5e | 4757 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4758 | return false; |
4759 | } | |
4760 | ||
4761 | if (!ifname) { | |
4762 | ERROR("No source interface name given"); | |
4763 | return false; | |
4764 | } | |
4765 | ||
0059379f | 4766 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4767 | pid = fork(); |
4768 | if (pid < 0) { | |
c7d76c09 | 4769 | ERROR("Failed to fork"); |
e58fae8f DY |
4770 | return false; |
4771 | } | |
4772 | ||
1a0e70ac | 4773 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4774 | pid_t init_pid; |
4775 | ||
4776 | init_pid = do_lxcapi_init_pid(c); | |
4777 | if (!switch_to_ns(init_pid, "net")) { | |
4778 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4779 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4780 | } |
4781 | ||
4782 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4783 | if (ret < 0) { |
4784 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4785 | _exit(EXIT_FAILURE); |
c7d76c09 | 4786 | } |
e58fae8f DY |
4787 | |
4788 | /* netdev of ifname is up. */ | |
4789 | if (ret) { | |
4790 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4791 | if (ret) { |
4792 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4793 | _exit(EXIT_FAILURE); |
c7d76c09 | 4794 | } |
e58fae8f DY |
4795 | } |
4796 | ||
4797 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4798 | /* -EINVAL means there is no netdev named as ifname. */ |
4799 | if (ret < 0) { | |
4800 | if (ret == -EINVAL) | |
4801 | ERROR("Network device \"%s\" not found", ifname); | |
4802 | else | |
4803 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4804 | |
8d7b6c25 | 4805 | _exit(EXIT_FAILURE); |
e58fae8f | 4806 | } |
c7d76c09 | 4807 | |
8d7b6c25 | 4808 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4809 | } |
4810 | ||
c7d76c09 CB |
4811 | ret = wait_for_pid(pid); |
4812 | if (ret != 0) | |
e58fae8f DY |
4813 | return false; |
4814 | ||
c7d76c09 | 4815 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4816 | return true; |
4817 | } | |
4818 | ||
858377e4 SH |
4819 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4820 | ||
aef3d51e TA |
4821 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4822 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4823 | { |
6b9be523 | 4824 | int ret = -1; |
2cb80427 | 4825 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4826 | uint64_t features_to_check = 0; |
85c50991 | 4827 | |
aef3d51e TA |
4828 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4829 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4830 | * to do anything special. | |
4831 | */ | |
4832 | if (size > sizeof(*opts)) { | |
4833 | unsigned char *addr; | |
4834 | unsigned char *end; | |
4835 | ||
4836 | addr = (void *)opts + sizeof(*opts); | |
4837 | end = (void *)opts + size; | |
a73846d8 | 4838 | |
4839 | for (; addr < end; addr++) | |
4840 | if (*addr) | |
aef3d51e | 4841 | return -E2BIG; |
85c50991 TA |
4842 | } |
4843 | ||
2cb80427 TA |
4844 | /* If the caller has a smaller struct, let's zero out the end for them |
4845 | * so we don't accidentally use bits of it that they didn't know about | |
4846 | * to initialize. | |
4847 | */ | |
4848 | if (size < sizeof(*opts)) { | |
4849 | valid_opts = malloc(sizeof(*opts)); | |
4850 | if (!valid_opts) | |
4851 | return -ENOMEM; | |
4852 | ||
4853 | memset(valid_opts, 0, sizeof(*opts)); | |
4854 | memcpy(valid_opts, opts, size); | |
4855 | } | |
4856 | ||
aef3d51e TA |
4857 | switch (cmd) { |
4858 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4859 | if (!do_lxcapi_is_running(c)) { |
4860 | ERROR("container is not running"); | |
6b9be523 | 4861 | goto on_error; |
7ad13c91 | 4862 | } |
a73846d8 | 4863 | |
2cb80427 | 4864 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4865 | break; |
4866 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4867 | if (!do_lxcapi_is_running(c)) { |
4868 | ERROR("container is not running"); | |
6b9be523 | 4869 | goto on_error; |
7ad13c91 | 4870 | } |
a73846d8 | 4871 | |
2cb80427 | 4872 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4873 | break; |
4874 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4875 | if (do_lxcapi_is_running(c)) { |
4876 | ERROR("container is already running"); | |
6b9be523 | 4877 | goto on_error; |
7ad13c91 | 4878 | } |
a73846d8 | 4879 | |
2cb80427 | 4880 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4881 | break; |
b5b12b9e AR |
4882 | case MIGRATE_FEATURE_CHECK: |
4883 | features_to_check = valid_opts->features_to_check; | |
4884 | ret = !__criu_check_feature(&features_to_check); | |
4885 | if (ret) { | |
4886 | /* Something went wrong. Let's let the caller | |
4887 | * know which feature checks failed. */ | |
4888 | valid_opts->features_to_check = features_to_check; | |
4889 | } | |
4890 | break; | |
aef3d51e TA |
4891 | default: |
4892 | ERROR("invalid migrate command %u", cmd); | |
4893 | ret = -EINVAL; | |
4894 | } | |
735f2c6e | 4895 | |
6b9be523 | 4896 | on_error: |
f686506d TA |
4897 | if (size < sizeof(*opts)) |
4898 | free(valid_opts); | |
4899 | ||
aef3d51e TA |
4900 | return ret; |
4901 | } | |
735f2c6e | 4902 | |
aef3d51e | 4903 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4904 | |
aef3d51e TA |
4905 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4906 | { | |
ebb088e1 AR |
4907 | struct migrate_opts opts; |
4908 | ||
4909 | memset(&opts, 0, sizeof(opts)); | |
4910 | ||
4911 | opts.directory = directory; | |
4912 | opts.stop = stop; | |
4913 | opts.verbose = verbose; | |
735f2c6e | 4914 | |
aef3d51e | 4915 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4916 | } |
4917 | ||
858377e4 SH |
4918 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4919 | ||
4920 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4921 | { |
ebb088e1 AR |
4922 | struct migrate_opts opts; |
4923 | ||
4924 | memset(&opts, 0, sizeof(opts)); | |
4925 | ||
4926 | opts.directory = directory; | |
4927 | opts.verbose = verbose; | |
c9d8f2ee | 4928 | |
aef3d51e | 4929 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4930 | } |
4931 | ||
858377e4 SH |
4932 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4933 | ||
1f5a90f9 CB |
4934 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4935 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4936 | { | |
4937 | char *dirdup, *destdirname; | |
4938 | int ret; | |
4939 | ||
4940 | dirdup = strdup(dest); | |
4941 | if (!dirdup) { | |
4942 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4943 | return -1; | |
4944 | } | |
4945 | destdirname = dirname(dirdup); | |
4946 | ||
4947 | ret = mkdir_p(destdirname, 0755); | |
4948 | if (ret < 0) { | |
4949 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4950 | free(dirdup); | |
4951 | return ret; | |
4952 | } | |
4953 | free(dirdup); | |
4954 | ||
4955 | (void)remove(dest); | |
4956 | ||
4957 | if (S_ISDIR(st_mode)) | |
4958 | ret = mkdir(dest, 0000); | |
4959 | else | |
4960 | ret = mknod(dest, S_IFREG | 0000, 0); | |
4961 | if (ret < 0) { | |
4962 | SYSERROR("Failed to create mount target \"%s\"", dest); | |
4963 | return -1; | |
4964 | } | |
4965 | ||
4966 | return 0; | |
4967 | } | |
4968 | ||
3340f441 CB |
4969 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
4970 | const char *target, const char *filesystemtype, | |
4971 | unsigned long mountflags, const void *data, | |
4972 | struct lxc_mount *mnt) | |
4973 | { | |
29df56cd LT |
4974 | char *suff, *sret; |
4975 | char template[MAXPATHLEN], path[MAXPATHLEN]; | |
4976 | pid_t pid, init_pid; | |
c6885c3f | 4977 | struct stat sb; |
29df56cd LT |
4978 | int ret = -1, fd = -EBADF; |
4979 | ||
4980 | if (!c || !c->lxc_conf) { | |
4981 | ERROR("Container or configuration is NULL"); | |
4982 | return -EINVAL; | |
4983 | } | |
4984 | ||
7a41e857 | 4985 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
4986 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
4987 | return -EINVAL; | |
4988 | } | |
29df56cd | 4989 | |
60534030 LT |
4990 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
4991 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
4992 | SYSERROR("Error writing shmounts tempdir name"); |
4993 | goto out; | |
4994 | } | |
4995 | ||
c6885c3f LT |
4996 | /* Create a temporary file / dir under the shared mountpoint */ |
4997 | if (!source || strcmp(source, "") == 0) { | |
4998 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
4999 | sb.st_mode = S_IFDIR; | |
5000 | } else { | |
5001 | ret = stat(source, &sb); | |
5002 | if (ret < 0) { | |
5003 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5004 | goto out; | |
5005 | } | |
5006 | } | |
5007 | ||
3340f441 | 5008 | if (S_ISDIR(sb.st_mode)) { |
c6885c3f LT |
5009 | sret = mkdtemp(template); |
5010 | if (!sret) { | |
5011 | SYSERROR("Could not create shmounts temporary dir"); | |
5012 | goto out; | |
5013 | } | |
c6885c3f LT |
5014 | } else { |
5015 | fd = lxc_make_tmpfile(template, false); | |
5016 | if (fd < 0) { | |
5017 | SYSERROR("Could not create shmounts temporary file"); | |
5018 | goto out; | |
5019 | } | |
29df56cd LT |
5020 | } |
5021 | ||
5022 | /* Do the fork */ | |
5023 | pid = fork(); | |
5024 | if (pid < 0) { | |
5025 | SYSERROR("Could not fork"); | |
5026 | goto out; | |
5027 | } | |
5028 | ||
5029 | if (pid == 0) { | |
5030 | /* Do the mount */ | |
5031 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5032 | if (ret < 0) { | |
c6885c3f | 5033 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5034 | _exit(EXIT_FAILURE); |
5035 | } | |
3340f441 | 5036 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5037 | |
5038 | init_pid = do_lxcapi_init_pid(c); | |
5039 | if (init_pid < 0) { | |
5040 | ERROR("Failed to obtain container's init pid"); | |
5041 | _exit(EXIT_FAILURE); | |
5042 | } | |
5043 | ||
5044 | /* Enter the container namespaces */ | |
5045 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5046 | if (!switch_to_ns(init_pid, "user")){ | |
5047 | ERROR("Failed to enter user namespace"); | |
5048 | _exit(EXIT_FAILURE); | |
5049 | } | |
5050 | } | |
3340f441 | 5051 | |
29df56cd LT |
5052 | if (!switch_to_ns(init_pid, "mnt")) { |
5053 | ERROR("Failed to enter mount namespace"); | |
5054 | _exit(EXIT_FAILURE); | |
5055 | } | |
5056 | ||
1f5a90f9 | 5057 | ret = create_mount_target(target, sb.st_mode); |
c6885c3f LT |
5058 | if (ret < 0) |
5059 | _exit(EXIT_FAILURE); | |
3340f441 | 5060 | TRACE("Created mount target \"%s\"", target); |
c6885c3f | 5061 | |
29df56cd LT |
5062 | suff = strrchr(template, '/'); |
5063 | if (!suff) | |
5064 | _exit(EXIT_FAILURE); | |
5065 | ||
60534030 LT |
5066 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5067 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd LT |
5068 | SYSERROR("Error writing container mountpoint name"); |
5069 | _exit(EXIT_FAILURE); | |
5070 | } | |
5071 | ||
3340f441 | 5072 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5073 | if (ret < 0) { |
5074 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
5075 | _exit(EXIT_FAILURE); | |
5076 | } | |
3340f441 | 5077 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5078 | |
5079 | _exit(EXIT_SUCCESS); | |
5080 | } | |
5081 | ||
5082 | ret = wait_for_pid(pid); | |
5083 | if (ret < 0) { | |
5084 | SYSERROR("Wait for the child with pid %ld failed", (long) pid); | |
5085 | goto out; | |
5086 | } | |
5087 | ||
5088 | ret = 0; | |
5089 | ||
5090 | (void)umount2(template, MNT_DETACH); | |
5091 | (void)unlink(template); | |
5092 | ||
5093 | out: | |
5094 | if (fd >= 0) | |
5095 | close(fd); | |
3340f441 | 5096 | |
29df56cd LT |
5097 | return ret; |
5098 | } | |
5099 | ||
5100 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5101 | unsigned long, const void *, struct lxc_mount *) |
5102 | ||
5103 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5104 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5105 | { |
5106 | pid_t pid, init_pid; | |
5107 | int ret = -1; | |
5108 | ||
5109 | if (!c || !c->lxc_conf) { | |
5110 | ERROR("Container or configuration is NULL"); | |
5111 | return -EINVAL; | |
5112 | } | |
5113 | ||
5114 | /* Do the fork */ | |
5115 | pid = fork(); | |
5116 | if (pid < 0) { | |
5117 | SYSERROR("Could not fork"); | |
5118 | return -1; | |
5119 | } | |
5120 | ||
5121 | if (pid == 0) { | |
5122 | init_pid = do_lxcapi_init_pid(c); | |
5123 | if (init_pid < 0) { | |
5124 | ERROR("Failed to obtain container's init pid"); | |
5125 | _exit(EXIT_FAILURE); | |
5126 | } | |
5127 | ||
5128 | /* Enter the container namespaces */ | |
5129 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5130 | if (!switch_to_ns(init_pid, "user")) { | |
5131 | ERROR("Failed to enter user namespace"); | |
5132 | _exit(EXIT_FAILURE); | |
5133 | } | |
5134 | } | |
5135 | ||
5136 | if (!switch_to_ns(init_pid, "mnt")) { | |
5137 | ERROR("Failed to enter mount namespace"); | |
5138 | _exit(EXIT_FAILURE); | |
5139 | } | |
5140 | ||
5141 | /* Do the unmount */ | |
7a41e857 | 5142 | ret = umount2(target, flags); |
d83da817 LT |
5143 | if (ret < 0) { |
5144 | SYSERROR("Failed to umount \"%s\"", target); | |
5145 | _exit(EXIT_FAILURE); | |
5146 | } | |
5147 | ||
5148 | _exit(EXIT_SUCCESS); | |
5149 | } | |
5150 | ||
5151 | ret = wait_for_pid(pid); | |
5152 | if (ret < 0) { | |
5153 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5154 | return -ret; | |
5155 | } | |
5156 | ||
5157 | return 0; | |
5158 | } | |
5159 | ||
5160 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5161 | |
a0e93eeb CS |
5162 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5163 | { | |
5164 | va_list ap; | |
5165 | const char **argv; | |
5166 | int ret; | |
5167 | ||
5168 | if (!c) | |
5169 | return -1; | |
5170 | ||
858377e4 SH |
5171 | current_config = c->lxc_conf; |
5172 | ||
a0e93eeb CS |
5173 | va_start(ap, arg); |
5174 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5175 | va_end(ap); | |
5176 | ||
5177 | if (!argv) { | |
5178 | ERROR("Memory allocation error."); | |
858377e4 SH |
5179 | ret = -1; |
5180 | goto out; | |
a0e93eeb CS |
5181 | } |
5182 | argv[0] = arg; | |
5183 | ||
858377e4 | 5184 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5185 | free((void*)argv); |
a73846d8 | 5186 | |
858377e4 SH |
5187 | out: |
5188 | current_config = NULL; | |
a0e93eeb CS |
5189 | return ret; |
5190 | } | |
5191 | ||
afeecbba | 5192 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5193 | { |
5194 | struct lxc_container *c; | |
cbb9c7c7 | 5195 | size_t len; |
72d0e1cb | 5196 | |
18aa217b SH |
5197 | if (!name) |
5198 | return NULL; | |
5199 | ||
72d0e1cb SG |
5200 | c = malloc(sizeof(*c)); |
5201 | if (!c) { | |
e9e29a33 | 5202 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5203 | return NULL; |
5204 | } | |
5205 | memset(c, 0, sizeof(*c)); | |
5206 | ||
afeecbba SH |
5207 | if (configpath) |
5208 | c->config_path = strdup(configpath); | |
5209 | else | |
593e8478 | 5210 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5211 | if (!c->config_path) { |
e9e29a33 | 5212 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5213 | goto err; |
5214 | } | |
5215 | ||
f5dd1d53 | 5216 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5217 | |
5218 | len = strlen(name); | |
5219 | c->name = malloc(len + 1); | |
72d0e1cb | 5220 | if (!c->name) { |
e9e29a33 | 5221 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5222 | goto err; |
5223 | } | |
cbb9c7c7 | 5224 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5225 | |
5226 | c->numthreads = 1; | |
e9e29a33 CB |
5227 | c->slock = lxc_newlock(c->config_path, name); |
5228 | if (!c->slock) { | |
5229 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5230 | goto err; |
5231 | } | |
5232 | ||
e9e29a33 CB |
5233 | c->privlock = lxc_newlock(NULL, NULL); |
5234 | if (!c->privlock) { | |
5235 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5236 | goto err; |
5237 | } | |
5238 | ||
afeecbba | 5239 | if (!set_config_filename(c)) { |
e9e29a33 | 5240 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5241 | goto err; |
5242 | } | |
72d0e1cb | 5243 | |
e9e29a33 CB |
5244 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5245 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5246 | goto err; |
e9e29a33 | 5247 | } |
72d0e1cb | 5248 | |
3e625e2d | 5249 | if (ongoing_create(c) == 2) { |
e9e29a33 | 5250 | ERROR("Failed to complete container creation for %s", c->name); |
17a367d8 | 5251 | container_destroy(c, NULL); |
4df7f012 | 5252 | lxcapi_clear_config(c); |
3e625e2d | 5253 | } |
a73846d8 | 5254 | |
a2739df5 | 5255 | c->daemonize = true; |
72cf75fa | 5256 | c->pidfile = NULL; |
3e625e2d | 5257 | |
1a0e70ac | 5258 | /* Assign the member functions. */ |
72d0e1cb SG |
5259 | c->is_defined = lxcapi_is_defined; |
5260 | c->state = lxcapi_state; | |
5261 | c->is_running = lxcapi_is_running; | |
5262 | c->freeze = lxcapi_freeze; | |
5263 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5264 | c->console = lxcapi_console; |
b5159817 | 5265 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5266 | c->init_pid = lxcapi_init_pid; |
5267 | c->load_config = lxcapi_load_config; | |
5268 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5269 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5270 | c->start = lxcapi_start; |
5271 | c->startl = lxcapi_startl; | |
5272 | c->stop = lxcapi_stop; | |
5273 | c->config_file_name = lxcapi_config_file_name; | |
5274 | c->wait = lxcapi_wait; | |
5275 | c->set_config_item = lxcapi_set_config_item; | |
5276 | c->destroy = lxcapi_destroy; | |
18aa217b | 5277 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5278 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5279 | c->save_config = lxcapi_save_config; |
5280 | c->get_keys = lxcapi_get_keys; | |
5281 | c->create = lxcapi_create; | |
5282 | c->createl = lxcapi_createl; | |
5283 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5284 | c->reboot = lxcapi_reboot; |
d39b10eb | 5285 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5286 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5287 | c->clear_config_item = lxcapi_clear_config_item; |
5288 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5289 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5290 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5291 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5292 | c->get_config_path = lxcapi_get_config_path; |
5293 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5294 | c->clone = lxcapi_clone; |
799f29ab | 5295 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5296 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5297 | c->attach = lxcapi_attach; |
5298 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5299 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5300 | c->snapshot = lxcapi_snapshot; |
5301 | c->snapshot_list = lxcapi_snapshot_list; | |
5302 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5303 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5304 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5305 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5306 | c->add_device_node = lxcapi_add_device_node; |
5307 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5308 | c->attach_interface = lxcapi_attach_interface; |
5309 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5310 | c->checkpoint = lxcapi_checkpoint; |
5311 | c->restore = lxcapi_restore; | |
aef3d51e | 5312 | c->migrate = lxcapi_migrate; |
191d43cc | 5313 | c->console_log = lxcapi_console_log; |
29df56cd | 5314 | c->mount = lxcapi_mount; |
d83da817 | 5315 | c->umount = lxcapi_umount; |
72d0e1cb | 5316 | |
72d0e1cb SG |
5317 | return c; |
5318 | ||
5319 | err: | |
5320 | lxc_container_free(c); | |
5321 | return NULL; | |
5322 | } | |
5323 | ||
4a7c7daa | 5324 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5325 | { |
5326 | int i; | |
5327 | ||
5328 | if (states) | |
5329 | for (i=0; i<MAX_STATE; i++) | |
5330 | states[i] = lxc_state2str(i); | |
a73846d8 | 5331 | |
72d0e1cb SG |
5332 | return MAX_STATE; |
5333 | } | |
a41f104b | 5334 | |
a41f104b SH |
5335 | /* |
5336 | * These next two could probably be done smarter with reusing a common function | |
5337 | * with different iterators and tests... | |
5338 | */ | |
5339 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5340 | { | |
5341 | DIR *dir; | |
5342 | int i, cfound = 0, nfound = 0; | |
74f96976 | 5343 | struct dirent *direntp; |
a41f104b SH |
5344 | struct lxc_container *c; |
5345 | ||
5346 | if (!lxcpath) | |
593e8478 | 5347 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5348 | |
a41f104b | 5349 | dir = opendir(lxcpath); |
a41f104b SH |
5350 | if (!dir) { |
5351 | SYSERROR("opendir on lxcpath"); | |
5352 | return -1; | |
5353 | } | |
5354 | ||
5355 | if (cret) | |
5356 | *cret = NULL; | |
a73846d8 | 5357 | |
a41f104b SH |
5358 | if (names) |
5359 | *names = NULL; | |
5360 | ||
74f96976 | 5361 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5362 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5363 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5364 | continue; |
5365 | ||
5366 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5367 | continue; | |
5368 | ||
a73846d8 | 5369 | if (names) |
9c88ff1f | 5370 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5371 | goto free_bad; |
a73846d8 | 5372 | |
a41f104b SH |
5373 | cfound++; |
5374 | ||
5375 | if (!cret) { | |
5376 | nfound++; | |
5377 | continue; | |
5378 | } | |
5379 | ||
5380 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5381 | if (!c) { | |
5382 | INFO("Container %s:%s has a config but could not be loaded", | |
5383 | lxcpath, direntp->d_name); | |
a73846d8 | 5384 | |
a41f104b | 5385 | if (names) |
9c88ff1f ÇO |
5386 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5387 | goto free_bad; | |
a73846d8 | 5388 | |
a41f104b SH |
5389 | continue; |
5390 | } | |
a73846d8 | 5391 | |
858377e4 | 5392 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5393 | INFO("Container %s:%s has a config but is not defined", |
5394 | lxcpath, direntp->d_name); | |
a73846d8 | 5395 | |
a41f104b | 5396 | if (names) |
9c88ff1f ÇO |
5397 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5398 | goto free_bad; | |
a73846d8 | 5399 | |
a41f104b SH |
5400 | lxc_container_put(c); |
5401 | continue; | |
5402 | } | |
5403 | ||
2871830a | 5404 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5405 | lxc_container_put(c); |
5406 | goto free_bad; | |
5407 | } | |
a73846d8 | 5408 | |
a41f104b SH |
5409 | nfound++; |
5410 | } | |
5411 | ||
a41f104b | 5412 | closedir(dir); |
a41f104b SH |
5413 | return nfound; |
5414 | ||
5415 | free_bad: | |
5416 | if (names && *names) { | |
5417 | for (i=0; i<cfound; i++) | |
5418 | free((*names)[i]); | |
5419 | free(*names); | |
5420 | } | |
a73846d8 | 5421 | |
a41f104b SH |
5422 | if (cret && *cret) { |
5423 | for (i=0; i<nfound; i++) | |
5424 | lxc_container_put((*cret)[i]); | |
5425 | free(*cret); | |
5426 | } | |
a73846d8 | 5427 | |
a41f104b | 5428 | closedir(dir); |
a41f104b SH |
5429 | return -1; |
5430 | } | |
5431 | ||
148a9d27 DE |
5432 | int list_active_containers(const char *lxcpath, char ***nret, |
5433 | struct lxc_container ***cret) | |
a41f104b | 5434 | { |
148a9d27 | 5435 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5436 | int lxcpath_len; |
5437 | char *line = NULL; | |
148a9d27 | 5438 | char **ct_name = NULL; |
a41f104b | 5439 | size_t len = 0; |
97bc2422 | 5440 | struct lxc_container *c = NULL; |
88556fd7 | 5441 | bool is_hashed; |
a41f104b SH |
5442 | |
5443 | if (!lxcpath) | |
593e8478 | 5444 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5445 | lxcpath_len = strlen(lxcpath); |
5446 | ||
5447 | if (cret) | |
5448 | *cret = NULL; | |
a73846d8 | 5449 | |
148a9d27 DE |
5450 | if (nret) |
5451 | *nret = NULL; | |
a41f104b | 5452 | |
a41f104b | 5453 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
5454 | if (!f) |
5455 | return -1; | |
5456 | ||
5457 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5458 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5459 | if (!p) |
5460 | continue; | |
5461 | p++; | |
a73846d8 | 5462 | |
a41f104b SH |
5463 | if (*p != 0x40) |
5464 | continue; | |
5465 | p++; | |
88556fd7 ÇO |
5466 | |
5467 | is_hashed = false; | |
a73846d8 | 5468 | |
88556fd7 ÇO |
5469 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5470 | p += lxcpath_len; | |
5471 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5472 | p += 4; | |
5473 | is_hashed = true; | |
5474 | } else { | |
a41f104b | 5475 | continue; |
88556fd7 ÇO |
5476 | } |
5477 | ||
a41f104b SH |
5478 | while (*p == '/') |
5479 | p++; | |
5480 | ||
1a0e70ac | 5481 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5482 | p2 = strchr(p, '/'); |
a41f104b SH |
5483 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5484 | continue; | |
5485 | *p2 = '\0'; | |
5486 | ||
88556fd7 | 5487 | if (is_hashed) { |
899a9f55 CB |
5488 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5489 | if (!recvpath) | |
5490 | continue; | |
a73846d8 | 5491 | |
e07eafa8 L |
5492 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5493 | free(recvpath); | |
88556fd7 | 5494 | continue; |
e07eafa8 L |
5495 | } |
5496 | free(recvpath); | |
a73846d8 | 5497 | |
88556fd7 | 5498 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5499 | if (!p) |
5500 | continue; | |
88556fd7 ÇO |
5501 | } |
5502 | ||
e07eafa8 L |
5503 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5504 | if (is_hashed) | |
5505 | free(p); | |
9c88ff1f | 5506 | continue; |
e07eafa8 | 5507 | } |
9c88ff1f | 5508 | |
e07eafa8 L |
5509 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5510 | if (is_hashed) | |
5511 | free(p); | |
148a9d27 | 5512 | goto free_cret_list; |
e07eafa8 | 5513 | } |
9c88ff1f | 5514 | |
148a9d27 | 5515 | ct_name_cnt++; |
a41f104b | 5516 | |
e07eafa8 L |
5517 | if (!cret) { |
5518 | if (is_hashed) | |
5519 | free(p); | |
a41f104b | 5520 | continue; |
e07eafa8 | 5521 | } |
a41f104b SH |
5522 | |
5523 | c = lxc_container_new(p, lxcpath); | |
5524 | if (!c) { | |
5525 | INFO("Container %s:%s is running but could not be loaded", | |
5526 | lxcpath, p); | |
a73846d8 | 5527 | |
148a9d27 | 5528 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5529 | if (is_hashed) |
5530 | free(p); | |
a73846d8 | 5531 | |
a41f104b SH |
5532 | continue; |
5533 | } | |
5534 | ||
e07eafa8 L |
5535 | if (is_hashed) |
5536 | free(p); | |
5537 | ||
a41f104b SH |
5538 | /* |
5539 | * If this is an anonymous container, then is_defined *can* | |
5540 | * return false. So we don't do that check. Count on the | |
5541 | * fact that the command socket exists. | |
5542 | */ | |
5543 | ||
148a9d27 | 5544 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5545 | lxc_container_put(c); |
148a9d27 | 5546 | goto free_cret_list; |
a41f104b | 5547 | } |
a73846d8 | 5548 | |
148a9d27 | 5549 | cret_cnt++; |
a41f104b SH |
5550 | } |
5551 | ||
97bc2422 CB |
5552 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5553 | if (c) | |
5554 | lxc_container_put(c); | |
5555 | goto free_cret_list; | |
5556 | } | |
5557 | ||
148a9d27 DE |
5558 | ret = ct_name_cnt; |
5559 | if (nret) | |
5560 | *nret = ct_name; | |
5561 | else | |
5562 | goto free_ct_name; | |
a73846d8 | 5563 | |
148a9d27 | 5564 | goto out; |
a41f104b | 5565 | |
148a9d27 | 5566 | free_cret_list: |
a41f104b | 5567 | if (cret && *cret) { |
148a9d27 | 5568 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5569 | lxc_container_put((*cret)[i]); |
5570 | free(*cret); | |
5571 | } | |
148a9d27 DE |
5572 | |
5573 | free_ct_name: | |
5574 | if (ct_name) { | |
5575 | for (i = 0; i < ct_name_cnt; i++) | |
5576 | free(ct_name[i]); | |
5577 | free(ct_name); | |
5578 | } | |
5579 | ||
5580 | out: | |
f10fad2f | 5581 | free(line); |
a41f104b | 5582 | fclose(f); |
148a9d27 | 5583 | return ret; |
a41f104b | 5584 | } |
2871830a DE |
5585 | |
5586 | int list_all_containers(const char *lxcpath, char ***nret, | |
5587 | struct lxc_container ***cret) | |
5588 | { | |
5589 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5590 | char **active_name; | |
5591 | char **ct_name; | |
5592 | struct lxc_container **ct_list = NULL; | |
5593 | ||
5594 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5595 | if (ct_cnt < 0) | |
5596 | return ct_cnt; | |
5597 | ||
5598 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5599 | if (active_cnt < 0) { | |
5600 | ret = active_cnt; | |
5601 | goto free_ct_name; | |
5602 | } | |
5603 | ||
5604 | for (i = 0; i < active_cnt; i++) { | |
5605 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5606 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5607 | ret = -1; | |
5608 | goto free_active_name; | |
5609 | } | |
a73846d8 | 5610 | |
2871830a DE |
5611 | ct_cnt++; |
5612 | } | |
a73846d8 | 5613 | |
2871830a DE |
5614 | free(active_name[i]); |
5615 | active_name[i] = NULL; | |
5616 | } | |
a73846d8 | 5617 | |
2871830a DE |
5618 | free(active_name); |
5619 | active_name = NULL; | |
5620 | active_cnt = 0; | |
5621 | ||
5622 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5623 | struct lxc_container *c; | |
5624 | ||
5625 | c = lxc_container_new(ct_name[i], lxcpath); | |
5626 | if (!c) { | |
5627 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5628 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5629 | continue; | |
5630 | } | |
5631 | ||
5632 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5633 | lxc_container_put(c); | |
5634 | ret = -1; | |
5635 | goto free_ct_list; | |
5636 | } | |
a73846d8 | 5637 | |
2871830a DE |
5638 | ct_list_cnt++; |
5639 | } | |
5640 | ||
5641 | if (cret) | |
5642 | *cret = ct_list; | |
5643 | ||
a73846d8 | 5644 | if (nret) { |
2871830a | 5645 | *nret = ct_name; |
a73846d8 | 5646 | } else { |
2871830a DE |
5647 | ret = ct_cnt; |
5648 | goto free_ct_name; | |
5649 | } | |
a73846d8 | 5650 | |
2871830a DE |
5651 | return ct_cnt; |
5652 | ||
5653 | free_ct_list: | |
5654 | for (i = 0; i < ct_list_cnt; i++) { | |
5655 | lxc_container_put(ct_list[i]); | |
5656 | } | |
f10fad2f | 5657 | free(ct_list); |
2871830a DE |
5658 | |
5659 | free_active_name: | |
5660 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5661 | free(active_name[i]); |
2871830a | 5662 | } |
f10fad2f | 5663 | free(active_name); |
2871830a DE |
5664 | |
5665 | free_ct_name: | |
5666 | for (i = 0; i < ct_cnt; i++) { | |
5667 | free(ct_name[i]); | |
5668 | } | |
5669 | free(ct_name); | |
5670 | return ret; | |
5671 | } | |
12461428 CB |
5672 | |
5673 | bool lxc_config_item_is_supported(const char *key) | |
5674 | { | |
300df83e | 5675 | return !!lxc_get_config(key); |
12461428 | 5676 | } |
aafa5f96 CB |
5677 | |
5678 | bool lxc_has_api_extension(const char *extension) | |
5679 | { | |
5680 | /* The NULL API extension is always present. :) */ | |
5681 | if (!extension) | |
5682 | return true; | |
5683 | ||
5684 | for (size_t i = 0; i < nr_api_extensions; i++) | |
5685 | if (strcmp(api_extensions[i], extension) == 0) | |
5686 | return true; | |
5687 | ||
5688 | return false; | |
5689 | } |