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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" | |
f5849fd7 | 64 | #include "memory_utils.h" |
f2363e38 ÇO |
65 | #include "monitor.h" |
66 | #include "namespace.h" | |
fed29fad | 67 | #include "network.h" |
9994d140 | 68 | #include "parse.h" |
d7b58715 | 69 | #include "raw_syscalls.h" |
aa460476 | 70 | #include "start.h" |
38683db4 | 71 | #include "state.h" |
28d832c4 CB |
72 | #include "storage.h" |
73 | #include "storage/btrfs.h" | |
74 | #include "storage/overlay.h" | |
0e14584d | 75 | #include "storage_utils.h" |
28d832c4 | 76 | #include "sync.h" |
e8f764b6 | 77 | #include "syscall_wrappers.h" |
0ed9b1bc | 78 | #include "terminal.h" |
38683db4 CB |
79 | #include "utils.h" |
80 | #include "version.h" | |
4ba0d9af | 81 | |
af6824fc ST |
82 | /* major()/minor() */ |
83 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 84 | #include <sys/mkdev.h> |
af6824fc | 85 | #endif |
af6824fc | 86 | |
684f79a5 SG |
87 | #if IS_BIONIC |
88 | #include <../include/lxcmntent.h> | |
89 | #else | |
90 | #include <mntent.h> | |
91 | #endif | |
92 | ||
9de31d5a CB |
93 | #ifndef HAVE_STRLCPY |
94 | #include "include/strlcpy.h" | |
95 | #endif | |
96 | ||
5f7eba0b SG |
97 | /* Define faccessat() if missing from the C library */ |
98 | #ifndef HAVE_FACCESSAT | |
99 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
100 | { | |
101 | #ifdef __NR_faccessat | |
238b3e5e | 102 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 103 | #else |
238b3e5e CB |
104 | errno = ENOSYS; |
105 | return -1; | |
5f7eba0b SG |
106 | #endif |
107 | } | |
108 | #endif | |
109 | ||
ac2cecc4 | 110 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 111 | |
858377e4 SH |
112 | static bool do_lxcapi_destroy(struct lxc_container *c); |
113 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
114 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
115 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
116 | static bool container_destroy(struct lxc_container *c, |
117 | struct lxc_storage *storage); | |
858377e4 SH |
118 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
119 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
120 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
121 | ||
a41f104b SH |
122 | static bool config_file_exists(const char *lxcpath, const char *cname) |
123 | { | |
7a99b5a0 | 124 | __do_free char *fname = NULL; |
ef1ab8f1 CB |
125 | int ret; |
126 | size_t len; | |
a41f104b | 127 | |
ef1ab8f1 CB |
128 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
129 | len = strlen(lxcpath) + strlen(cname) + 9; | |
f5849fd7 | 130 | fname = must_realloc(NULL, len); |
ef1ab8f1 CB |
131 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); |
132 | if (ret < 0 || (size_t)ret >= len) | |
a41f104b SH |
133 | return false; |
134 | ||
135 | return file_exists(fname); | |
136 | } | |
137 | ||
444249ea CB |
138 | /* A few functions to help detect when a container creation failed. If a |
139 | * container creation was killed partway through, then trying to actually start | |
140 | * that container could harm the host. We detect this by creating a 'partial' | |
141 | * file under the container directory, and keeping an advisory lock. When | |
142 | * container creation completes, we remove that file. When we load or try to | |
143 | * start a container, if we find that file, without a flock, we remove the | |
144 | * container. | |
3e625e2d | 145 | */ |
74a3920a | 146 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 147 | { |
7a99b5a0 | 148 | __do_free char *path = NULL; |
3e625e2d | 149 | int fd, ret; |
444249ea | 150 | size_t len; |
56474555 | 151 | struct flock lk = {0}; |
93dc5327 | 152 | |
444249ea | 153 | len = strlen(c->config_path) + strlen(c->name) + 10; |
f5849fd7 | 154 | path = must_realloc(NULL, len); |
3e625e2d | 155 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
444249ea | 156 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 157 | return -1; |
3e625e2d | 158 | |
d1bc8d48 CB |
159 | fd = open(path, O_RDWR | O_CLOEXEC); |
160 | if (fd < 0) { | |
161 | if (errno != ENOENT) | |
162 | return -1; | |
444249ea | 163 | |
3e625e2d | 164 | return 0; |
d1bc8d48 | 165 | } |
444249ea | 166 | |
93dc5327 SH |
167 | lk.l_type = F_WRLCK; |
168 | lk.l_whence = SEEK_SET; | |
ec74f3f8 CB |
169 | /* F_OFD_GETLK requires that l_pid be set to 0 otherwise the kernel |
170 | * will EINVAL us. | |
171 | */ | |
172 | lk.l_pid = 0; | |
444249ea | 173 | |
56474555 | 174 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
d1bc8d48 | 175 | if (ret < 0 && errno == EINVAL) { |
56474555 | 176 | ret = flock(fd, LOCK_EX | LOCK_NB); |
d1bc8d48 CB |
177 | if (ret < 0 && errno == EWOULDBLOCK) |
178 | ret = 0; | |
179 | } | |
a73846d8 | 180 | |
444249ea | 181 | close(fd); |
a73846d8 | 182 | |
ec74f3f8 CB |
183 | /* F_OFD_GETLK will not send us back a pid so don't check it. */ |
184 | if (ret == 0) | |
185 | /* Create is still ongoing. */ | |
3e625e2d | 186 | return 1; |
444249ea CB |
187 | |
188 | /* Create completed but partial is still there. */ | |
3e625e2d SH |
189 | return 2; |
190 | } | |
191 | ||
74a3920a | 192 | static int create_partial(struct lxc_container *c) |
3e625e2d | 193 | { |
7a99b5a0 | 194 | __do_free char *path = NULL; |
3e625e2d | 195 | int fd, ret; |
f5cd0252 | 196 | size_t len; |
56474555 | 197 | struct flock lk = {0}; |
93dc5327 | 198 | |
f5cd0252 CB |
199 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
200 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
f5849fd7 | 201 | path = must_realloc(NULL, len); |
3e625e2d | 202 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
f5cd0252 | 203 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 204 | return -1; |
f5cd0252 | 205 | |
d1bc8d48 | 206 | fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0000); |
f5cd0252 | 207 | if (fd < 0) |
3e625e2d | 208 | return -1; |
f5cd0252 | 209 | |
93dc5327 SH |
210 | lk.l_type = F_WRLCK; |
211 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 212 | |
56474555 | 213 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 214 | if (ret < 0) { |
56474555 CB |
215 | if (errno == EINVAL) { |
216 | ret = flock(fd, LOCK_EX); | |
217 | if (ret == 0) | |
218 | return fd; | |
219 | } | |
220 | ||
f5cd0252 | 221 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 222 | close(fd); |
3e625e2d SH |
223 | return -1; |
224 | } | |
3e625e2d SH |
225 | |
226 | return fd; | |
227 | } | |
228 | ||
74a3920a | 229 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 230 | { |
7a99b5a0 | 231 | __do_free char *path = NULL; |
3e625e2d | 232 | int ret; |
a3740e80 | 233 | size_t len; |
3e625e2d SH |
234 | |
235 | close(fd); | |
a73846d8 | 236 | |
a3740e80 CB |
237 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
238 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
f5849fd7 | 239 | path = must_realloc(NULL, len); |
3e625e2d | 240 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
a3740e80 | 241 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 242 | return; |
a3740e80 CB |
243 | |
244 | ret = unlink(path); | |
245 | if (ret < 0) | |
246 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
247 | } |
248 | ||
72d0e1cb | 249 | /* LOCKING |
3bc449ed SH |
250 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
251 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
252 | * container configuration file. | |
253 | * The container_disk_lock also takes the container_mem_lock. | |
254 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
255 | * NOTHING mutexes two independent programs with their own struct |
256 | * lxc_container for the same c->name, between API calls. For instance, | |
257 | * c->config_read(); c->start(); Between those calls, data on disk | |
258 | * could change (which shouldn't bother the caller unless for instance | |
259 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
260 | * Two such updaters could race. The callers should therefore check their | |
261 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
262 | * due to hung callers. So I prefer to keep the locks only within our own | |
263 | * functions, not across functions. | |
264 | * | |
3bc449ed | 265 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
266 | * c->numthreads (under privlock) before forking. When deleting, |
267 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
268 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
269 | */ | |
72d0e1cb SG |
270 | static void lxc_container_free(struct lxc_container *c) |
271 | { | |
272 | if (!c) | |
273 | return; | |
274 | ||
f10fad2f ME |
275 | free(c->configfile); |
276 | c->configfile = NULL; | |
70849dc2 | 277 | |
f10fad2f ME |
278 | free(c->error_string); |
279 | c->error_string = NULL; | |
70849dc2 | 280 | |
d95db067 | 281 | if (c->slock) { |
df271a59 | 282 | lxc_putlock(c->slock); |
d95db067 DE |
283 | c->slock = NULL; |
284 | } | |
70849dc2 | 285 | |
72d0e1cb | 286 | if (c->privlock) { |
df271a59 | 287 | lxc_putlock(c->privlock); |
72d0e1cb SG |
288 | c->privlock = NULL; |
289 | } | |
70849dc2 | 290 | |
f10fad2f ME |
291 | free(c->name); |
292 | c->name = NULL; | |
70849dc2 | 293 | |
d95db067 DE |
294 | if (c->lxc_conf) { |
295 | lxc_conf_free(c->lxc_conf); | |
296 | c->lxc_conf = NULL; | |
297 | } | |
70849dc2 | 298 | |
f10fad2f ME |
299 | free(c->config_path); |
300 | c->config_path = NULL; | |
72cf75fa | 301 | |
72d0e1cb SG |
302 | free(c); |
303 | } | |
304 | ||
045552aa CB |
305 | /* Consider the following case: |
306 | * | |
307 | * |====================================================================| | |
308 | * | freer | racing get()er | | |
309 | * |====================================================================| | |
310 | * | lxc_container_put() | lxc_container_get() | | |
311 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
312 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
313 | * | \ lxcunlock() | \ | | |
314 | * | \ lxc_container_free() | \ lxclock() returns | | |
315 | * | | \ c->numthreads < 1 -> return 0 | | |
316 | * | \ \ (free stuff) | | | |
317 | * | \ \ sem_destroy(privlock) | | | |
318 | * |_______________________________|____________________________________| | |
319 | * | |
43d1aa34 SH |
320 | * When the get()er checks numthreads the first time, one of the following |
321 | * is true: | |
322 | * 1. freer has set numthreads = 0. get() returns 0 | |
323 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
324 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
325 | * numthreads is 0 and exit without touching lxclock again.. | |
326 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
327 | * will see --numthreads = 1 and not call lxc_container_free(). | |
328 | */ | |
329 | ||
72d0e1cb SG |
330 | int lxc_container_get(struct lxc_container *c) |
331 | { | |
332 | if (!c) | |
333 | return 0; | |
334 | ||
1a0e70ac CB |
335 | /* If someone else has already started freeing the container, don't try |
336 | * to take the lock, which may be invalid. | |
337 | */ | |
43d1aa34 SH |
338 | if (c->numthreads < 1) |
339 | return 0; | |
340 | ||
5cee8c50 | 341 | if (container_mem_lock(c)) |
72d0e1cb | 342 | return 0; |
1a0e70ac CB |
343 | |
344 | /* Bail without trying to unlock, bc the privlock is now probably in | |
345 | * freed memory. | |
346 | */ | |
347 | if (c->numthreads < 1) | |
72d0e1cb | 348 | return 0; |
1a0e70ac | 349 | |
72d0e1cb | 350 | c->numthreads++; |
5cee8c50 | 351 | container_mem_unlock(c); |
045552aa | 352 | |
72d0e1cb SG |
353 | return 1; |
354 | } | |
355 | ||
356 | int lxc_container_put(struct lxc_container *c) | |
357 | { | |
358 | if (!c) | |
359 | return -1; | |
045552aa | 360 | |
5cee8c50 | 361 | if (container_mem_lock(c)) |
72d0e1cb | 362 | return -1; |
045552aa | 363 | |
44619b6c CB |
364 | c->numthreads--; |
365 | ||
366 | if (c->numthreads < 1) { | |
5cee8c50 | 367 | container_mem_unlock(c); |
72d0e1cb SG |
368 | lxc_container_free(c); |
369 | return 1; | |
370 | } | |
045552aa | 371 | |
5cee8c50 | 372 | container_mem_unlock(c); |
72d0e1cb SG |
373 | return 0; |
374 | } | |
375 | ||
858377e4 | 376 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 377 | { |
428ad142 | 378 | int statret; |
72d0e1cb SG |
379 | struct stat statbuf; |
380 | bool ret = false; | |
72d0e1cb SG |
381 | |
382 | if (!c) | |
383 | return false; | |
384 | ||
5cee8c50 | 385 | if (container_mem_lock(c)) |
72d0e1cb | 386 | return false; |
428ad142 | 387 | |
72d0e1cb | 388 | if (!c->configfile) |
428ad142 CB |
389 | goto on_error; |
390 | ||
72d0e1cb SG |
391 | statret = stat(c->configfile, &statbuf); |
392 | if (statret != 0) | |
428ad142 CB |
393 | goto on_error; |
394 | ||
72d0e1cb SG |
395 | ret = true; |
396 | ||
428ad142 | 397 | on_error: |
5cee8c50 | 398 | container_mem_unlock(c); |
72d0e1cb SG |
399 | return ret; |
400 | } | |
401 | ||
858377e4 SH |
402 | #define WRAP_API(rettype, fnname) \ |
403 | static rettype fnname(struct lxc_container *c) \ | |
404 | { \ | |
405 | rettype ret; \ | |
8164f0e2 TA |
406 | bool reset_config = false; \ |
407 | \ | |
408 | if (!current_config && c && c->lxc_conf) { \ | |
409 | current_config = c->lxc_conf; \ | |
410 | reset_config = true; \ | |
411 | } \ | |
412 | \ | |
858377e4 | 413 | ret = do_##fnname(c); \ |
8164f0e2 TA |
414 | if (reset_config) \ |
415 | current_config = NULL; \ | |
416 | \ | |
858377e4 SH |
417 | return ret; \ |
418 | } | |
419 | ||
420 | #define WRAP_API_1(rettype, fnname, t1) \ | |
421 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
422 | { \ | |
423 | rettype ret; \ | |
8164f0e2 TA |
424 | bool reset_config = false; \ |
425 | \ | |
426 | if (!current_config && c && c->lxc_conf) { \ | |
427 | current_config = c->lxc_conf; \ | |
428 | reset_config = true; \ | |
429 | } \ | |
430 | \ | |
858377e4 | 431 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
432 | if (reset_config) \ |
433 | current_config = NULL; \ | |
434 | \ | |
858377e4 SH |
435 | return ret; \ |
436 | } | |
437 | ||
438 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
439 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
440 | { \ | |
441 | rettype ret; \ | |
8164f0e2 TA |
442 | bool reset_config = false; \ |
443 | \ | |
444 | if (!current_config && c && c->lxc_conf) { \ | |
445 | current_config = c->lxc_conf; \ | |
446 | reset_config = true; \ | |
447 | } \ | |
448 | \ | |
858377e4 | 449 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
450 | if (reset_config) \ |
451 | current_config = NULL; \ | |
452 | \ | |
858377e4 SH |
453 | return ret; \ |
454 | } | |
455 | ||
456 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
457 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
458 | { \ | |
459 | rettype ret; \ | |
8164f0e2 TA |
460 | bool reset_config = false; \ |
461 | \ | |
462 | if (!current_config && c && c->lxc_conf) { \ | |
463 | current_config = c->lxc_conf; \ | |
464 | reset_config = true; \ | |
465 | } \ | |
466 | \ | |
858377e4 | 467 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
468 | if (reset_config) \ |
469 | current_config = NULL; \ | |
470 | \ | |
858377e4 SH |
471 | return ret; \ |
472 | } | |
473 | ||
29df56cd LT |
474 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
475 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
476 | t4 a4, t5 a5, t6 a6) \ | |
477 | { \ | |
478 | rettype ret; \ | |
479 | bool reset_config = false; \ | |
480 | \ | |
481 | if (!current_config && c && c->lxc_conf) { \ | |
482 | current_config = c->lxc_conf; \ | |
483 | reset_config = true; \ | |
484 | } \ | |
485 | \ | |
486 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
487 | if (reset_config) \ | |
488 | current_config = NULL; \ | |
489 | \ | |
490 | return ret; \ | |
491 | } | |
492 | ||
858377e4 SH |
493 | WRAP_API(bool, lxcapi_is_defined) |
494 | ||
495 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 496 | { |
72d0e1cb SG |
497 | lxc_state_t s; |
498 | ||
499 | if (!c) | |
500 | return NULL; | |
b547d79f | 501 | |
13f5be62 | 502 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 503 | return lxc_state2str(s); |
72d0e1cb SG |
504 | } |
505 | ||
858377e4 SH |
506 | WRAP_API(const char *, lxcapi_state) |
507 | ||
39dc698c | 508 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
509 | { |
510 | lxc_state_t s; | |
5bddcb62 | 511 | |
13f5be62 | 512 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
513 | return (s == STOPPED); |
514 | } | |
515 | ||
858377e4 | 516 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 517 | { |
72d0e1cb SG |
518 | if (!c) |
519 | return false; | |
1b61062f | 520 | |
9e630418 | 521 | return !is_stopped(c); |
72d0e1cb SG |
522 | } |
523 | ||
858377e4 SH |
524 | WRAP_API(bool, lxcapi_is_running) |
525 | ||
526 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb | 527 | { |
2341916a | 528 | lxc_state_t s; |
8787b387 | 529 | |
02f71d7e | 530 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
531 | return false; |
532 | ||
2341916a | 533 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
534 | if (s != FROZEN) |
535 | return lxc_freeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8787b387 | 536 | |
72d0e1cb SG |
537 | return true; |
538 | } | |
539 | ||
858377e4 SH |
540 | WRAP_API(bool, lxcapi_freeze) |
541 | ||
542 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb | 543 | { |
2341916a | 544 | lxc_state_t s; |
8e59e0ba | 545 | |
02f71d7e | 546 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
547 | return false; |
548 | ||
2341916a | 549 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
550 | if (s == FROZEN) |
551 | return lxc_unfreeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8e59e0ba | 552 | |
72d0e1cb SG |
553 | return true; |
554 | } | |
555 | ||
858377e4 SH |
556 | WRAP_API(bool, lxcapi_unfreeze) |
557 | ||
558 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 559 | { |
0115f8fd DE |
560 | if (!c) |
561 | return -1; | |
562 | ||
c86e2584 | 563 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
564 | } |
565 | ||
858377e4 SH |
566 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
567 | ||
b5159817 DE |
568 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
569 | int stdoutfd, int stderrfd, int escape) | |
570 | { | |
858377e4 SH |
571 | int ret; |
572 | ||
573 | if (!c) | |
574 | return -1; | |
575 | ||
576 | current_config = c->lxc_conf; | |
577 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
578 | current_config = NULL; | |
49cfedb3 | 579 | |
858377e4 | 580 | return ret; |
b5159817 DE |
581 | } |
582 | ||
191d43cc CB |
583 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
584 | { | |
585 | int ret; | |
586 | ||
5106ecd0 | 587 | if (!c) |
588 | return -EINVAL; | |
589 | ||
191d43cc CB |
590 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); |
591 | if (ret < 0) { | |
592 | if (ret == -ENODATA) | |
63b74cda | 593 | NOTICE("The console log is empty"); |
191d43cc | 594 | else if (ret == -EFAULT) |
63b74cda CB |
595 | NOTICE("The container does not keep a console log"); |
596 | else if (ret == -ENOENT) | |
597 | NOTICE("The container does not keep a console log file"); | |
598 | else if (ret == -EIO) | |
599 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 600 | else |
63b74cda | 601 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
602 | } |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
608 | ||
858377e4 | 609 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 610 | { |
72d0e1cb SG |
611 | if (!c) |
612 | return -1; | |
613 | ||
5cee8c50 | 614 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
615 | } |
616 | ||
858377e4 SH |
617 | WRAP_API(pid_t, lxcapi_init_pid) |
618 | ||
12a50cc6 | 619 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
620 | { |
621 | if (!c->lxc_conf) | |
622 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 623 | |
6b0d5538 SH |
624 | if (!c->lxc_conf) |
625 | return false; | |
e3246ab9 | 626 | |
d08779d4 SH |
627 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
628 | return false; | |
e3246ab9 | 629 | |
c7b17051 | 630 | c->lxc_conf->name = c->name; |
d08779d4 | 631 | return true; |
8eb5694b SH |
632 | } |
633 | ||
858377e4 | 634 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 635 | { |
39dc698c | 636 | int lret; |
12a50cc6 | 637 | const char *fname; |
d03ab308 CB |
638 | bool need_disklock = false, ret = false; |
639 | ||
72d0e1cb SG |
640 | if (!c) |
641 | return false; | |
642 | ||
643 | fname = c->configfile; | |
a73846d8 | 644 | |
72d0e1cb SG |
645 | if (alt_file) |
646 | fname = alt_file; | |
a73846d8 | 647 | |
72d0e1cb SG |
648 | if (!fname) |
649 | return false; | |
d03ab308 CB |
650 | |
651 | /* If we're reading something other than the container's config, we only | |
652 | * need to lock the in-memory container. If loading the container's | |
653 | * config file, take the disk lock. | |
39dc698c SH |
654 | */ |
655 | if (strcmp(fname, c->configfile) == 0) | |
656 | need_disklock = true; | |
657 | ||
658 | if (need_disklock) | |
659 | lret = container_disk_lock(c); | |
660 | else | |
661 | lret = container_mem_lock(c); | |
662 | if (lret) | |
72d0e1cb | 663 | return false; |
39dc698c | 664 | |
8eb5694b | 665 | ret = load_config_locked(c, fname); |
39dc698c SH |
666 | |
667 | if (need_disklock) | |
668 | container_disk_unlock(c); | |
669 | else | |
670 | container_mem_unlock(c); | |
d03ab308 | 671 | |
72d0e1cb SG |
672 | return ret; |
673 | } | |
674 | ||
858377e4 SH |
675 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
676 | ||
677 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 678 | { |
497a2995 | 679 | if (!c || !c->lxc_conf) |
540f932a | 680 | return false; |
fb5999f6 CB |
681 | |
682 | if (container_mem_lock(c)) | |
540f932a | 683 | return false; |
fb5999f6 | 684 | |
a2739df5 | 685 | c->daemonize = state; |
d630991d | 686 | |
3bc449ed | 687 | container_mem_unlock(c); |
fb5999f6 | 688 | |
540f932a | 689 | return true; |
72d0e1cb SG |
690 | } |
691 | ||
858377e4 SH |
692 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
693 | ||
694 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
695 | { |
696 | if (!c || !c->lxc_conf) | |
49badbbe | 697 | return false; |
871ed23b CB |
698 | |
699 | if (container_mem_lock(c)) | |
49badbbe | 700 | return false; |
871ed23b | 701 | |
540f932a | 702 | c->lxc_conf->close_all_fds = state; |
d630991d | 703 | |
130a1888 | 704 | container_mem_unlock(c); |
871ed23b | 705 | |
49badbbe | 706 | return true; |
130a1888 ÇO |
707 | } |
708 | ||
858377e4 SH |
709 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
710 | ||
e202dfb8 CB |
711 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
712 | int timeout) | |
7a44c8b4 SG |
713 | { |
714 | int ret; | |
715 | ||
716 | if (!c) | |
717 | return false; | |
718 | ||
67e571de | 719 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
720 | return ret == 0; |
721 | } | |
722 | ||
858377e4 | 723 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 724 | |
2d834aa8 SH |
725 | static bool am_single_threaded(void) |
726 | { | |
2d834aa8 | 727 | DIR *dir; |
d630991d | 728 | struct dirent *direntp; |
6b0297e3 | 729 | int count = 0; |
2d834aa8 | 730 | |
2d834aa8 | 731 | dir = opendir("/proc/self/task"); |
6b0297e3 | 732 | if (!dir) |
2d834aa8 | 733 | return false; |
2d834aa8 | 734 | |
74f96976 | 735 | while ((direntp = readdir(dir))) { |
d630991d | 736 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
737 | continue; |
738 | ||
d630991d | 739 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 740 | continue; |
6b0297e3 | 741 | |
d630991d CB |
742 | count++; |
743 | if (count > 1) | |
2d834aa8 SH |
744 | break; |
745 | } | |
2d834aa8 | 746 | closedir(dir); |
6b0297e3 | 747 | |
2d834aa8 SH |
748 | return count == 1; |
749 | } | |
750 | ||
fd51a89b SH |
751 | static void push_arg(char ***argp, char *arg, int *nargs) |
752 | { | |
fd51a89b | 753 | char *copy; |
1452d3fe | 754 | char **argv; |
fd51a89b | 755 | |
d630991d | 756 | copy = must_copy_string(arg); |
1452d3fe | 757 | |
fd51a89b SH |
758 | do { |
759 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
760 | } while (!argv); | |
1452d3fe | 761 | |
fd51a89b SH |
762 | *argp = argv; |
763 | argv[*nargs] = copy; | |
764 | (*nargs)++; | |
765 | argv[*nargs] = NULL; | |
766 | } | |
767 | ||
768 | static char **split_init_cmd(const char *incmd) | |
769 | { | |
f5849fd7 CB |
770 | __do_free char *copy = NULL; |
771 | char *p; | |
fd51a89b | 772 | char **argv; |
75bd13ab | 773 | int nargs = 0; |
fd51a89b SH |
774 | |
775 | if (!incmd) | |
776 | return NULL; | |
777 | ||
f5849fd7 | 778 | copy = must_copy_string(incmd); |
fd51a89b SH |
779 | |
780 | do { | |
781 | argv = malloc(sizeof(char *)); | |
782 | } while (!argv); | |
75bd13ab | 783 | |
fd51a89b | 784 | argv[0] = NULL; |
f5849fd7 | 785 | lxc_iterate_parts (p, copy, " ") |
fd51a89b SH |
786 | push_arg(&argv, p, &nargs); |
787 | ||
788 | if (nargs == 0) { | |
789 | free(argv); | |
790 | return NULL; | |
791 | } | |
75bd13ab | 792 | |
fd51a89b SH |
793 | return argv; |
794 | } | |
795 | ||
796 | static void free_init_cmd(char **argv) | |
797 | { | |
798 | int i = 0; | |
799 | ||
800 | if (!argv) | |
801 | return; | |
702bf732 | 802 | |
fd51a89b SH |
803 | while (argv[i]) |
804 | free(argv[i++]); | |
702bf732 | 805 | |
fd51a89b SH |
806 | free(argv); |
807 | } | |
808 | ||
5e5576a4 CB |
809 | static int lxc_rcv_status(int state_socket) |
810 | { | |
a73846d8 | 811 | int ret; |
812 | int state = -1; | |
5e5576a4 | 813 | |
ee8377bd | 814 | again: |
a73846d8 | 815 | /* Receive container state. */ |
816 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
817 | if (ret <= 0) { | |
ee8377bd CB |
818 | if (errno != EINTR) |
819 | return -1; | |
a73846d8 | 820 | |
ee8377bd CB |
821 | TRACE("Caught EINTR; retrying"); |
822 | goto again; | |
823 | } | |
5e5576a4 | 824 | |
a73846d8 | 825 | return state; |
5e5576a4 CB |
826 | } |
827 | ||
828 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
829 | { | |
a73846d8 | 830 | int ret, state; |
5e5576a4 | 831 | |
a73846d8 | 832 | /* Close write end of the socket pair. */ |
833 | close(handler->state_socket_pair[1]); | |
834 | handler->state_socket_pair[1] = -1; | |
5e5576a4 | 835 | |
a73846d8 | 836 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 837 | |
a73846d8 | 838 | /* Close read end of the socket pair. */ |
839 | close(handler->state_socket_pair[0]); | |
840 | handler->state_socket_pair[0] = -1; | |
5e5576a4 | 841 | |
a73846d8 | 842 | /* The first child is going to fork() again and then exits. So we reap |
843 | * the first child here. | |
844 | */ | |
01c1b11e CB |
845 | ret = wait_for_pid(pid); |
846 | if (ret < 0) | |
a73846d8 | 847 | DEBUG("Failed waiting on first child %d", pid); |
01c1b11e | 848 | else |
a73846d8 | 849 | DEBUG("First child %d exited", pid); |
5e5576a4 | 850 | |
a73846d8 | 851 | if (state < 0) { |
852 | SYSERROR("Failed to receive the container state"); | |
853 | return false; | |
854 | } | |
5e5576a4 | 855 | |
a73846d8 | 856 | /* If we receive anything else then running we know that the container |
857 | * failed to start. | |
858 | */ | |
859 | if (state != RUNNING) { | |
860 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
861 | lxc_state2str(state)); | |
862 | return false; | |
863 | } | |
5e5576a4 | 864 | |
a73846d8 | 865 | TRACE("Container is in \"RUNNING\" state"); |
866 | return true; | |
5e5576a4 CB |
867 | } |
868 | ||
858377e4 | 869 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
870 | { |
871 | int ret; | |
aa460476 | 872 | struct lxc_handler *handler; |
72d0e1cb | 873 | struct lxc_conf *conf; |
72d0e1cb SG |
874 | char *default_args[] = { |
875 | "/sbin/init", | |
13aad0ae | 876 | NULL, |
72d0e1cb | 877 | }; |
fd51a89b | 878 | char **init_cmd = NULL; |
c1a3e547 | 879 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 880 | |
7cb19d44 | 881 | /* container does exist */ |
72d0e1cb SG |
882 | if (!c) |
883 | return false; | |
120146b9 | 884 | |
7cb19d44 CB |
885 | /* If anything fails before we set error_num, we want an error in there. |
886 | */ | |
120146b9 SG |
887 | c->error_num = 1; |
888 | ||
7cb19d44 | 889 | /* Container has not been setup. */ |
72d0e1cb SG |
890 | if (!c->lxc_conf) |
891 | return false; | |
892 | ||
c47eafec CB |
893 | ret = ongoing_create(c); |
894 | if (ret < 0) { | |
7cb19d44 | 895 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 896 | return false; |
3e625e2d | 897 | } else if (ret == 1) { |
7cb19d44 | 898 | ERROR("Ongoing container creation detected"); |
3e625e2d | 899 | return false; |
c47eafec | 900 | } else if (ret == 2) { |
7cb19d44 | 901 | ERROR("Failed to create container"); |
c47eafec CB |
902 | do_lxcapi_destroy(c); |
903 | return false; | |
3e625e2d SH |
904 | } |
905 | ||
5cee8c50 | 906 | if (container_mem_lock(c)) |
72d0e1cb | 907 | return false; |
d630991d | 908 | |
72d0e1cb | 909 | conf = c->lxc_conf; |
72d0e1cb | 910 | |
aa460476 | 911 | /* initialize handler */ |
9640c6a7 | 912 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 913 | |
dbc9832d | 914 | container_mem_unlock(c); |
aa460476 CB |
915 | if (!handler) |
916 | return false; | |
917 | ||
fa30091b CB |
918 | if (!argv) { |
919 | if (useinit && conf->execute_cmd) | |
920 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
921 | else | |
922 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
923 | } | |
fd51a89b | 924 | |
7cb19d44 | 925 | /* ... otherwise use default_args. */ |
fa30091b | 926 | if (!argv) { |
e1e76423 CB |
927 | if (useinit) { |
928 | ERROR("No valid init detected"); | |
929 | lxc_free_handler(handler); | |
fa30091b | 930 | return false; |
e1e76423 CB |
931 | } |
932 | argv = default_args; | |
fa30091b | 933 | } |
72d0e1cb | 934 | |
7cb19d44 CB |
935 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
936 | * here to protect the on disk container? We don't want to exclude | |
937 | * things like lxc_info while the container is running. | |
938 | */ | |
9640c6a7 | 939 | if (c->daemonize) { |
a6b6ad7b | 940 | bool started; |
0a4be28d | 941 | char title[2048]; |
c47eafec | 942 | pid_t pid; |
71454076 | 943 | |
c47eafec | 944 | pid = fork(); |
f2e07cb6 | 945 | if (pid < 0) { |
c47eafec | 946 | free_init_cmd(init_cmd); |
f2e07cb6 | 947 | lxc_free_handler(handler); |
72d0e1cb | 948 | return false; |
f2e07cb6 | 949 | } |
6eaac303 | 950 | |
7cb19d44 | 951 | /* first parent */ |
6eaac303 QH |
952 | if (pid != 0) { |
953 | /* Set to NULL because we don't want father unlink | |
954 | * the PID file, child will do the free and unlink. | |
955 | */ | |
956 | c->pidfile = NULL; | |
5e5576a4 | 957 | |
7cb19d44 CB |
958 | /* Wait for container to tell us whether it started |
959 | * successfully. | |
960 | */ | |
a6b6ad7b CB |
961 | started = wait_on_daemonized_start(handler, pid); |
962 | ||
963 | free_init_cmd(init_cmd); | |
964 | lxc_free_handler(handler); | |
965 | return started; | |
6eaac303 | 966 | } |
025ed0f3 | 967 | |
7cb19d44 CB |
968 | /* first child */ |
969 | ||
0a4be28d | 970 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
971 | * characters. All that it means is that the proctitle will be |
972 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
bafad468 CB |
973 | */ |
974 | ret = snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); | |
975 | if (ret > 0) { | |
976 | ret = setproctitle(title); | |
977 | if (ret < 0) | |
978 | INFO("Failed to set process title to %s", title); | |
979 | else | |
980 | INFO("Set process title to %s", title); | |
981 | } | |
0a4be28d | 982 | |
7cb19d44 CB |
983 | /* We fork() a second time to be reparented to init. Like |
984 | * POSIX's daemon() function we change to "/" and redirect | |
985 | * std{in,out,err} to /dev/null. | |
986 | */ | |
697fa639 SH |
987 | pid = fork(); |
988 | if (pid < 0) { | |
7cb19d44 | 989 | SYSERROR("Failed to fork first child process"); |
d608fbda | 990 | _exit(EXIT_FAILURE); |
697fa639 | 991 | } |
a6b6ad7b | 992 | |
7cb19d44 | 993 | /* second parent */ |
a6b6ad7b CB |
994 | if (pid != 0) { |
995 | free_init_cmd(init_cmd); | |
996 | lxc_free_handler(handler); | |
d608fbda | 997 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
998 | } |
999 | ||
7cb19d44 CB |
1000 | /* second child */ |
1001 | ||
1002 | /* change to / directory */ | |
1003 | ret = chdir("/"); | |
1004 | if (ret < 0) { | |
1005 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 1006 | _exit(EXIT_FAILURE); |
c278cef2 | 1007 | } |
7cb19d44 | 1008 | |
c1a3e547 CB |
1009 | keepfds[0] = handler->conf->maincmd_fd; |
1010 | keepfds[1] = handler->state_socket_pair[0]; | |
1011 | keepfds[2] = handler->state_socket_pair[1]; | |
1012 | ret = lxc_check_inherited(conf, true, keepfds, | |
1013 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 1014 | if (ret < 0) |
d608fbda | 1015 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1016 | |
1017 | /* redirect std{in,out,err} to /dev/null */ | |
1018 | ret = null_stdfds(); | |
1019 | if (ret < 0) { | |
1020 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1021 | _exit(EXIT_FAILURE); |
69aeabac | 1022 | } |
7cb19d44 CB |
1023 | |
1024 | /* become session leader */ | |
1025 | ret = setsid(); | |
1026 | if (ret < 0) | |
0059379f | 1027 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
bafad468 CB |
1028 | } else if (!am_single_threaded()) { |
1029 | ERROR("Cannot start non-daemonized container when threaded"); | |
1030 | free_init_cmd(init_cmd); | |
1031 | lxc_free_handler(handler); | |
1032 | return false; | |
72d0e1cb SG |
1033 | } |
1034 | ||
bafad468 CB |
1035 | /* We need to write PID file after daemonize, so we always write the |
1036 | * right PID. | |
6eaac303 QH |
1037 | */ |
1038 | if (c->pidfile) { | |
a7547c5c | 1039 | int w; |
b07ea13d | 1040 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
7cea5905 | 1041 | |
b07ea13d | 1042 | w = snprintf(pidstr, sizeof(pidstr), "%d", lxc_raw_getpid()); |
979a0d93 | 1043 | if (w < 0 || (size_t)w >= sizeof(pidstr)) { |
c47eafec | 1044 | free_init_cmd(init_cmd); |
f2e07cb6 | 1045 | lxc_free_handler(handler); |
7cea5905 CB |
1046 | |
1047 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1048 | ||
9640c6a7 | 1049 | if (c->daemonize) |
d608fbda | 1050 | _exit(EXIT_FAILURE); |
7cea5905 | 1051 | |
6eaac303 QH |
1052 | return false; |
1053 | } | |
1054 | ||
7cea5905 CB |
1055 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1056 | if (ret < 0) { | |
c47eafec | 1057 | free_init_cmd(init_cmd); |
f2e07cb6 | 1058 | lxc_free_handler(handler); |
7cea5905 | 1059 | |
bafad468 | 1060 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); |
7cea5905 | 1061 | |
9640c6a7 | 1062 | if (c->daemonize) |
d608fbda | 1063 | _exit(EXIT_FAILURE); |
7cea5905 | 1064 | |
6eaac303 QH |
1065 | return false; |
1066 | } | |
6eaac303 QH |
1067 | } |
1068 | ||
80308d07 | 1069 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1070 | |
a8dfe4e0 WB |
1071 | /* Unshare the mount namespace if requested */ |
1072 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1073 | ret = unshare(CLONE_NEWNS); |
1074 | if (ret < 0) { | |
bafad468 | 1075 | SYSERROR("Failed to unshare mount namespace"); |
f2e07cb6 | 1076 | lxc_free_handler(handler); |
a6b6ad7b | 1077 | ret = 1; |
7cb19d44 | 1078 | goto on_error; |
a8dfe4e0 | 1079 | } |
7cb19d44 CB |
1080 | |
1081 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1082 | if (ret < 0) { | |
a8dfe4e0 | 1083 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1084 | lxc_free_handler(handler); |
a6b6ad7b | 1085 | ret = 1; |
7cb19d44 | 1086 | goto on_error; |
a8dfe4e0 WB |
1087 | } |
1088 | } | |
1089 | ||
8bee8851 | 1090 | reboot: |
80308d07 | 1091 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1092 | /* initialize handler */ |
9640c6a7 | 1093 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1094 | if (!handler) { |
1095 | ret = 1; | |
7cb19d44 | 1096 | goto on_error; |
a6b6ad7b | 1097 | } |
aa460476 CB |
1098 | } |
1099 | ||
c1a3e547 CB |
1100 | keepfds[0] = handler->conf->maincmd_fd; |
1101 | keepfds[1] = handler->state_socket_pair[0]; | |
1102 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1103 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1104 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1105 | if (ret < 0) { |
f2e07cb6 | 1106 | lxc_free_handler(handler); |
d2cf4c37 | 1107 | ret = 1; |
7cb19d44 | 1108 | goto on_error; |
d2cf4c37 SH |
1109 | } |
1110 | ||
9605460f | 1111 | if (useinit) |
9640c6a7 CB |
1112 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1113 | c->daemonize, &c->error_num); | |
9605460f | 1114 | else |
9640c6a7 CB |
1115 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1116 | c->daemonize, &c->error_num); | |
72d0e1cb | 1117 | |
80308d07 | 1118 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1119 | INFO("Container requested reboot"); |
80308d07 | 1120 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1121 | goto reboot; |
1122 | } | |
1123 | ||
7cb19d44 | 1124 | on_error: |
487d8008 QH |
1125 | if (c->pidfile) { |
1126 | unlink(c->pidfile); | |
1127 | free(c->pidfile); | |
1128 | c->pidfile = NULL; | |
1129 | } | |
fd51a89b SH |
1130 | free_init_cmd(init_cmd); |
1131 | ||
9640c6a7 | 1132 | if (c->daemonize && ret != 0) |
d608fbda | 1133 | _exit(EXIT_FAILURE); |
9640c6a7 | 1134 | else if (c->daemonize) |
d608fbda | 1135 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1136 | |
1137 | if (ret != 0) | |
1138 | return false; | |
1139 | ||
1140 | return true; | |
72d0e1cb SG |
1141 | } |
1142 | ||
0c14779f CB |
1143 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1144 | char *const argv[]) | |
858377e4 SH |
1145 | { |
1146 | bool ret; | |
0c14779f | 1147 | |
858377e4 SH |
1148 | current_config = c ? c->lxc_conf : NULL; |
1149 | ret = do_lxcapi_start(c, useinit, argv); | |
1150 | current_config = NULL; | |
0c14779f | 1151 | |
858377e4 SH |
1152 | return ret; |
1153 | } | |
1154 | ||
9f52e331 | 1155 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1156 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1157 | { | |
1158 | va_list ap; | |
a0e93eeb | 1159 | char **inargs = NULL; |
72d0e1cb SG |
1160 | bool bret = false; |
1161 | ||
1162 | /* container exists */ | |
1163 | if (!c) | |
1164 | return false; | |
1165 | ||
858377e4 SH |
1166 | current_config = c->lxc_conf; |
1167 | ||
72d0e1cb | 1168 | va_start(ap, useinit); |
a0e93eeb | 1169 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1170 | va_end(ap); |
9f52e331 CB |
1171 | if (!inargs) |
1172 | goto on_error; | |
72d0e1cb | 1173 | |
a0e93eeb | 1174 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1175 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1176 | |
9f52e331 | 1177 | on_error: |
72d0e1cb | 1178 | if (inargs) { |
4e03ae57 | 1179 | char **arg; |
a73846d8 | 1180 | |
4e03ae57 DE |
1181 | for (arg = inargs; *arg; arg++) |
1182 | free(*arg); | |
72d0e1cb SG |
1183 | free(inargs); |
1184 | } | |
1185 | ||
858377e4 | 1186 | current_config = NULL; |
9f52e331 | 1187 | |
72d0e1cb SG |
1188 | return bret; |
1189 | } | |
1190 | ||
858377e4 | 1191 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1192 | { |
1193 | int ret; | |
1194 | ||
1195 | if (!c) | |
1196 | return false; | |
1197 | ||
ef6e34ee | 1198 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1199 | |
d775f21b | 1200 | return ret == 0; |
72d0e1cb SG |
1201 | } |
1202 | ||
858377e4 SH |
1203 | WRAP_API(bool, lxcapi_stop) |
1204 | ||
d5752559 SH |
1205 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1206 | { | |
f5849fd7 | 1207 | __do_free char *p = NULL; |
78d44e5a | 1208 | int lasterr; |
78d44e5a CB |
1209 | int ret = -1; |
1210 | ||
d5752559 SH |
1211 | mode_t mask = umask(0002); |
1212 | ret = mkdir(path, 0770); | |
1213 | lasterr = errno; | |
1214 | umask(mask); | |
1215 | errno = lasterr; | |
1216 | if (ret) { | |
78d44e5a | 1217 | if (errno != EEXIST) |
d5752559 | 1218 | return -1; |
78d44e5a CB |
1219 | |
1220 | ret = 0; | |
d5752559 | 1221 | } |
78d44e5a | 1222 | |
f5849fd7 | 1223 | p = must_copy_string(path); |
cbb9c7c7 | 1224 | |
78d44e5a CB |
1225 | if (!lxc_list_empty(&conf->id_map)) { |
1226 | ret = chown_mapped_root(p, conf); | |
1227 | if (ret < 0) | |
1228 | ret = -1; | |
d5752559 | 1229 | } |
78d44e5a | 1230 | |
d5752559 SH |
1231 | return ret; |
1232 | } | |
1233 | ||
dfa7eaeb | 1234 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1235 | static bool create_container_dir(struct lxc_container *c) |
1236 | { | |
dfa7eaeb CB |
1237 | int ret; |
1238 | size_t len; | |
72d0e1cb | 1239 | char *s; |
72d0e1cb | 1240 | |
2a59a681 | 1241 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1242 | s = malloc(len); |
1243 | if (!s) | |
1244 | return false; | |
dfa7eaeb | 1245 | |
2a59a681 | 1246 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1247 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1248 | free(s); |
1249 | return false; | |
1250 | } | |
dfa7eaeb | 1251 | |
d5752559 | 1252 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1253 | free(s); |
dfa7eaeb | 1254 | |
72d0e1cb SG |
1255 | return ret == 0; |
1256 | } | |
1257 | ||
10bc1861 CB |
1258 | /* do_storage_create: thin wrapper around storage_create(). Like |
1259 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1260 | */ |
10bc1861 CB |
1261 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1262 | const char *type, | |
1263 | struct bdev_specs *specs) | |
1897e3bc | 1264 | { |
7a99b5a0 | 1265 | __do_free char *dest = NULL; |
e9e29a33 | 1266 | int ret; |
1897e3bc | 1267 | size_t len; |
10bc1861 | 1268 | struct lxc_storage *bdev; |
1897e3bc | 1269 | |
cd219ae6 | 1270 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1271 | if (c->lxc_conf->rootfs.path && |
1272 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1273 | const char *rpath = c->lxc_conf->rootfs.path; |
1274 | len = strlen(rpath) + 1; | |
f5849fd7 | 1275 | dest = must_realloc(NULL, len); |
cf465fe4 | 1276 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1277 | } else { |
858377e4 | 1278 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 | 1279 | len = strlen(c->name) + strlen(lxcpath) + 9; |
f5849fd7 | 1280 | dest = must_realloc(NULL, len); |
cd219ae6 SY |
1281 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); |
1282 | } | |
e9e29a33 | 1283 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1284 | return NULL; |
1285 | ||
10bc1861 | 1286 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1287 | if (!bdev) { |
e9e29a33 | 1288 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1289 | return NULL; |
d44e88c2 SH |
1290 | } |
1291 | ||
7a96a068 | 1292 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1293 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
f7ac4459 CB |
1294 | return NULL; |
1295 | } | |
cf3ef16d | 1296 | |
e9e29a33 CB |
1297 | /* If we are not root, chown the rootfs dir to root in the target user |
1298 | * namespace. | |
f7ac4459 | 1299 | */ |
e9e29a33 CB |
1300 | ret = geteuid(); |
1301 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1302 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1303 | if (ret < 0) { | |
1304 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1305 | suggest_default_idmap(); |
10bc1861 | 1306 | storage_put(bdev); |
cf3ef16d SH |
1307 | return NULL; |
1308 | } | |
1309 | } | |
1310 | ||
1897e3bc SH |
1311 | return bdev; |
1312 | } | |
1313 | ||
96b3cb40 | 1314 | static char *lxcbasename(char *path) |
72d0e1cb | 1315 | { |
47e55887 CB |
1316 | char *p; |
1317 | ||
1318 | p = path + strlen(path) - 1; | |
96b3cb40 SH |
1319 | while (*p != '/' && p > path) |
1320 | p--; | |
47e55887 | 1321 | |
96b3cb40 SH |
1322 | return p; |
1323 | } | |
72d0e1cb | 1324 | |
47e55887 CB |
1325 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1326 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1327 | { |
47e55887 | 1328 | int ret; |
96b3cb40 | 1329 | pid_t pid; |
72d0e1cb | 1330 | |
72d0e1cb | 1331 | if (!tpath) |
96b3cb40 | 1332 | return true; |
72d0e1cb SG |
1333 | |
1334 | pid = fork(); | |
1335 | if (pid < 0) { | |
7e34710e | 1336 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1337 | return false; |
72d0e1cb SG |
1338 | } |
1339 | ||
1a0e70ac | 1340 | if (pid == 0) { /* child */ |
47e55887 CB |
1341 | int i, len; |
1342 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1343 | char **newargv; |
47e55887 CB |
1344 | int nargs = 0; |
1345 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1346 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1347 | uid_t euid; |
72d0e1cb | 1348 | |
47e55887 CB |
1349 | if (need_null_stdfds) { |
1350 | ret = null_stdfds(); | |
1351 | if (ret < 0) | |
1352 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1353 | } |
1897e3bc | 1354 | |
8a388ed4 | 1355 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1356 | if (!bdev) { |
47e55887 | 1357 | ERROR("Failed to initialize storage"); |
7e34710e | 1358 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1359 | } |
1360 | ||
47e55887 CB |
1361 | euid = geteuid(); |
1362 | if (euid == 0) { | |
1363 | ret = unshare(CLONE_NEWNS); | |
1364 | if (ret < 0) { | |
1365 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1366 | _exit(EXIT_FAILURE); |
cf3ef16d | 1367 | } |
47e55887 CB |
1368 | |
1369 | ret = detect_shared_rootfs(); | |
1370 | if (ret == 1) { | |
1371 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1372 | if (ret < 0) { | |
1373 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1374 | ERROR("Continuing..."); |
1375 | } | |
1376 | } | |
1377 | } | |
47e55887 CB |
1378 | |
1379 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1380 | if (euid != 0) { | |
1381 | ERROR("Unprivileged users can only create " | |
1382 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1383 | _exit(EXIT_FAILURE); |
4de2791f | 1384 | } |
241978fa | 1385 | |
47e55887 CB |
1386 | if (strcmp(bdev->type, "overlay") == 0 || |
1387 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1388 | /* If we create an overlay container we need to |
1389 | * rsync the contents into | |
1390 | * <container-path>/<container-name>/rootfs. | |
1391 | * However, the overlay mount function will | |
1392 | * mount will mount | |
1393 | * <container-path>/<container-name>/delta0 | |
1394 | * over | |
1395 | * <container-path>/<container-name>/rootfs | |
1396 | * which means we would rsync the rootfs into | |
1397 | * the delta directory. That doesn't make sense | |
1398 | * since the delta directory only exists to | |
1399 | * record the differences to | |
1400 | * <container-path>/<container-name>/rootfs. So | |
1401 | * let's simply bind-mount here and then rsync | |
1402 | * directly into | |
1403 | * <container-path>/<container-name>/rootfs. | |
1404 | */ | |
1405 | char *src; | |
1406 | ||
1407 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1408 | if (!src) { | |
1409 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1410 | _exit(EXIT_FAILURE); |
241978fa CB |
1411 | } |
1412 | ||
1413 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1414 | if (ret < 0) { | |
1415 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1416 | _exit(EXIT_FAILURE); |
241978fa CB |
1417 | } |
1418 | } else { | |
47e55887 CB |
1419 | ret = bdev->ops->mount(bdev); |
1420 | if (ret < 0) { | |
241978fa | 1421 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1422 | _exit(EXIT_FAILURE); |
241978fa | 1423 | } |
cf3ef16d | 1424 | } |
1a0e70ac | 1425 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1426 | const char *src; |
f10fad2f | 1427 | free(bdev->dest); |
e9705550 CB |
1428 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1429 | bdev->dest = strdup(src); | |
1897e3bc SH |
1430 | } |
1431 | ||
47e55887 CB |
1432 | /* Create our new array, pre-pend the template name and base |
1433 | * args. | |
72d0e1cb SG |
1434 | */ |
1435 | if (argv) | |
a73846d8 | 1436 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1437 | ; |
a73846d8 | 1438 | |
47e55887 CB |
1439 | /* template, path, rootfs and name args */ |
1440 | nargs += 4; | |
cf3ef16d | 1441 | |
72d0e1cb SG |
1442 | newargv = malloc(nargs * sizeof(*newargv)); |
1443 | if (!newargv) | |
7e34710e | 1444 | _exit(EXIT_FAILURE); |
96b3cb40 | 1445 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 1446 | |
47e55887 | 1447 | /* --path */ |
2a59a681 | 1448 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1449 | patharg = malloc(len); |
1450 | if (!patharg) | |
7e34710e | 1451 | _exit(EXIT_FAILURE); |
a73846d8 | 1452 | |
2a59a681 | 1453 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1454 | if (ret < 0 || ret >= len) |
7e34710e | 1455 | _exit(EXIT_FAILURE); |
72d0e1cb | 1456 | newargv[1] = patharg; |
47e55887 CB |
1457 | |
1458 | /* --name */ | |
72d0e1cb SG |
1459 | len = strlen("--name=") + strlen(c->name) + 1; |
1460 | namearg = malloc(len); | |
1461 | if (!namearg) | |
7e34710e | 1462 | _exit(EXIT_FAILURE); |
a73846d8 | 1463 | |
72d0e1cb SG |
1464 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1465 | if (ret < 0 || ret >= len) | |
7e34710e | 1466 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1467 | newargv[2] = namearg; |
1468 | ||
47e55887 | 1469 | /* --rootfs */ |
1897e3bc SH |
1470 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1471 | rootfsarg = malloc(len); | |
1472 | if (!rootfsarg) | |
7e34710e | 1473 | _exit(EXIT_FAILURE); |
a73846d8 | 1474 | |
1897e3bc SH |
1475 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1476 | if (ret < 0 || ret >= len) | |
7e34710e | 1477 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1478 | newargv[3] = rootfsarg; |
1479 | ||
72d0e1cb SG |
1480 | /* add passed-in args */ |
1481 | if (argv) | |
1897e3bc | 1482 | for (i = 4; i < nargs; i++) |
47e55887 | 1483 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1484 | |
1485 | /* add trailing NULL */ | |
1486 | nargs++; | |
1487 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1488 | if (!newargv) | |
7e34710e | 1489 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1490 | newargv[nargs - 1] = NULL; |
1491 | ||
47e55887 CB |
1492 | /* If we're running the template in a mapped userns, then we |
1493 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1494 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1495 | * the mapped uid for our geteuid() | |
cf3ef16d | 1496 | */ |
0e6e3a41 | 1497 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1498 | int extraargs, hostuid_mapped, hostgid_mapped; |
1499 | char **n2; | |
1500 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1501 | struct lxc_list *it; |
1502 | struct id_map *map; | |
47e55887 | 1503 | int n2args = 1; |
cf3ef16d | 1504 | |
47e55887 CB |
1505 | n2 = malloc(n2args * sizeof(*n2)); |
1506 | if (!n2) | |
7e34710e | 1507 | _exit(EXIT_FAILURE); |
47e55887 | 1508 | |
cf3ef16d SH |
1509 | newargv[0] = tpath; |
1510 | tpath = "lxc-usernsexec"; | |
1511 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1512 | |
cf3ef16d SH |
1513 | lxc_list_for_each(it, &conf->id_map) { |
1514 | map = it->elem; | |
1515 | n2args += 2; | |
57d116ab | 1516 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1517 | if (!n2) |
7e34710e | 1518 | _exit(EXIT_FAILURE); |
47e55887 CB |
1519 | |
1520 | n2[n2args - 2] = "-m"; | |
1521 | n2[n2args - 1] = malloc(200); | |
1522 | if (!n2[n2args - 1]) | |
7e34710e | 1523 | _exit(EXIT_FAILURE); |
47e55887 CB |
1524 | |
1525 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1526 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1527 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1528 | if (ret < 0 || ret >= 200) |
7e34710e | 1529 | _exit(EXIT_FAILURE); |
cf3ef16d | 1530 | } |
47e55887 CB |
1531 | |
1532 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1533 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1534 | |
57d116ab | 1535 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1536 | if (!n2) |
7e34710e | 1537 | _exit(EXIT_FAILURE); |
47e55887 CB |
1538 | |
1539 | if (hostuid_mapped < 0) { | |
1540 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1541 | n2[n2args++] = "-m"; |
47e55887 CB |
1542 | if (hostuid_mapped < 0) { |
1543 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1544 | _exit(EXIT_FAILURE); |
cf3ef16d | 1545 | } |
47e55887 | 1546 | |
cf3ef16d | 1547 | n2[n2args++] = malloc(200); |
47e55887 | 1548 | if (!n2[n2args - 1]) { |
cf3ef16d | 1549 | SYSERROR("out of memory"); |
7e34710e | 1550 | _exit(EXIT_FAILURE); |
cf3ef16d | 1551 | } |
a73846d8 | 1552 | |
47e55887 CB |
1553 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1554 | hostuid_mapped, geteuid()); | |
1555 | if (ret < 0 || ret >= 200) | |
7e34710e | 1556 | _exit(EXIT_FAILURE); |
cf3ef16d | 1557 | } |
47e55887 CB |
1558 | |
1559 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1560 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1561 | |
2133f58c SH |
1562 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1563 | if (!n2) | |
7e34710e | 1564 | _exit(EXIT_FAILURE); |
47e55887 | 1565 | |
2133f58c | 1566 | if (hostgid_mapped < 0) { |
339efad9 | 1567 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1568 | n2[n2args++] = "-m"; |
1569 | if (hostgid_mapped < 0) { | |
47e55887 | 1570 | ERROR("Failed to find free gid to map"); |
7e34710e | 1571 | _exit(EXIT_FAILURE); |
2133f58c | 1572 | } |
47e55887 | 1573 | |
2133f58c | 1574 | n2[n2args++] = malloc(200); |
47e55887 | 1575 | if (!n2[n2args - 1]) { |
2133f58c | 1576 | SYSERROR("out of memory"); |
7e34710e | 1577 | _exit(EXIT_FAILURE); |
2133f58c | 1578 | } |
47e55887 CB |
1579 | |
1580 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1581 | hostgid_mapped, getegid()); | |
1582 | if (ret < 0 || ret >= 200) | |
7e34710e | 1583 | _exit(EXIT_FAILURE); |
2133f58c | 1584 | } |
a73846d8 | 1585 | |
cf3ef16d | 1586 | n2[n2args++] = "--"; |
a73846d8 | 1587 | |
cf3ef16d SH |
1588 | for (i = 0; i < nargs; i++) |
1589 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1590 | n2args += nargs; |
47e55887 CB |
1591 | |
1592 | /* Finally add "--mapped-uid $uid" to tell template what | |
1593 | * to chown cached images to. | |
1a0e70ac | 1594 | */ |
2133f58c | 1595 | n2args += 4; |
57d116ab | 1596 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1597 | if (!n2) |
7e34710e | 1598 | _exit(EXIT_FAILURE); |
47e55887 | 1599 | |
1a0e70ac | 1600 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1601 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1602 | |
1603 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1604 | if (ret < 0 || ret >= 20) { | |
1605 | free(newargv); | |
1606 | free(n2); | |
1607 | _exit(EXIT_FAILURE); | |
1608 | } | |
1609 | ||
47e55887 CB |
1610 | n2[n2args - 4] = txtuid; |
1611 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1612 | |
1f080b1d CB |
1613 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1614 | if (ret < 0 || ret >= 20) { | |
1615 | free(newargv); | |
1616 | free(n2); | |
1617 | _exit(EXIT_FAILURE); | |
1618 | } | |
4250ef64 | 1619 | |
47e55887 CB |
1620 | n2[n2args - 2] = txtgid; |
1621 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1622 | free(newargv); |
1623 | newargv = n2; | |
1624 | } | |
47e55887 | 1625 | |
cf3ef16d | 1626 | execvp(tpath, newargv); |
e9705550 | 1627 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1628 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1629 | } |
1630 | ||
47e55887 CB |
1631 | ret = wait_for_pid(pid); |
1632 | if (ret != 0) { | |
1633 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1634 | return false; |
1635 | } | |
1636 | ||
1637 | return true; | |
1638 | } | |
1639 | ||
74a3920a | 1640 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1641 | { |
1fd9bd50 | 1642 | long flen; |
630ac7c6 | 1643 | size_t len; |
b4569e93 | 1644 | char *contents; |
3ce74686 | 1645 | FILE *f; |
025ed0f3 | 1646 | int ret = -1; |
52026772 | 1647 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1648 | int i; |
3ce74686 | 1649 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1650 | char *tpath; |
52026772 | 1651 | #endif |
3ce74686 | 1652 | |
025ed0f3 | 1653 | f = fopen(path, "r"); |
025ed0f3 | 1654 | if (f == NULL) |
3ce74686 | 1655 | return false; |
025ed0f3 | 1656 | |
630ac7c6 CB |
1657 | ret = fseek(f, 0, SEEK_END); |
1658 | if (ret < 0) | |
025ed0f3 | 1659 | goto out_error; |
630ac7c6 CB |
1660 | |
1661 | ret = -1; | |
1662 | flen = ftell(f); | |
1663 | if (flen < 0) | |
025ed0f3 | 1664 | goto out_error; |
630ac7c6 CB |
1665 | |
1666 | ret = fseek(f, 0, SEEK_SET); | |
1667 | if (ret < 0) | |
025ed0f3 | 1668 | goto out_error; |
630ac7c6 CB |
1669 | |
1670 | ret = fseek(f, 0, SEEK_SET); | |
1671 | if (ret < 0) | |
1672 | goto out_error; | |
1673 | ||
1674 | ret = -1; | |
1675 | contents = malloc(flen + 1); | |
1676 | if (!contents) | |
025ed0f3 | 1677 | goto out_error; |
630ac7c6 CB |
1678 | |
1679 | len = fread(contents, 1, flen, f); | |
1680 | if (len != flen) | |
025ed0f3 SH |
1681 | goto out_free_contents; |
1682 | ||
3ce74686 | 1683 | contents[flen] = '\0'; |
a73846d8 | 1684 | |
025ed0f3 | 1685 | ret = fclose(f); |
025ed0f3 SH |
1686 | f = NULL; |
1687 | if (ret < 0) | |
1688 | goto out_free_contents; | |
3ce74686 | 1689 | |
b4569e93 | 1690 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1691 | tpath = get_template_path(t); |
85db5535 | 1692 | if (!tpath) { |
630ac7c6 | 1693 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1694 | goto out_free_contents; |
3ce74686 SH |
1695 | } |
1696 | ||
85db5535 DE |
1697 | ret = sha1sum_file(tpath, md_value); |
1698 | if (ret < 0) { | |
630ac7c6 | 1699 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1700 | free(tpath); |
85db5535 | 1701 | goto out_free_contents; |
3ce74686 | 1702 | } |
cef701ed | 1703 | free(tpath); |
3ce74686 SH |
1704 | #endif |
1705 | ||
025ed0f3 | 1706 | f = fopen(path, "w"); |
025ed0f3 | 1707 | if (f == NULL) { |
630ac7c6 | 1708 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1709 | free(contents); |
1710 | return false; | |
1711 | } | |
630ac7c6 | 1712 | |
3ce74686 SH |
1713 | fprintf(f, "# Template used to create this container: %s\n", t); |
1714 | if (argv) { | |
1715 | fprintf(f, "# Parameters passed to the template:"); | |
1716 | while (*argv) { | |
1717 | fprintf(f, " %s", *argv); | |
1718 | argv++; | |
1719 | } | |
1720 | fprintf(f, "\n"); | |
1721 | } | |
a73846d8 | 1722 | |
3ce74686 | 1723 | #if HAVE_LIBGNUTLS |
56698177 SH |
1724 | fprintf(f, "# Template script checksum (SHA-1): "); |
1725 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1726 | fprintf(f, "%02x", md_value[i]); | |
1727 | fprintf(f, "\n"); | |
3ce74686 | 1728 | #endif |
0520c252 | 1729 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1730 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1731 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1732 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1733 | if (fwrite(contents, 1, flen, f) != flen) { |
1734 | SYSERROR("Writing original contents"); | |
1735 | free(contents); | |
1736 | fclose(f); | |
1737 | return false; | |
1738 | } | |
630ac7c6 | 1739 | |
025ed0f3 | 1740 | ret = 0; |
630ac7c6 | 1741 | |
025ed0f3 | 1742 | out_free_contents: |
3ce74686 | 1743 | free(contents); |
630ac7c6 | 1744 | |
025ed0f3 SH |
1745 | out_error: |
1746 | if (f) { | |
1747 | int newret; | |
025ed0f3 | 1748 | newret = fclose(f); |
025ed0f3 SH |
1749 | if (ret == 0) |
1750 | ret = newret; | |
1751 | } | |
630ac7c6 | 1752 | |
025ed0f3 SH |
1753 | if (ret < 0) { |
1754 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1755 | return false; |
1756 | } | |
630ac7c6 | 1757 | |
3ce74686 SH |
1758 | return true; |
1759 | } | |
1760 | ||
4df7f012 SH |
1761 | static void lxcapi_clear_config(struct lxc_container *c) |
1762 | { | |
e62fd16f CB |
1763 | if (!c || !c->lxc_conf) |
1764 | return; | |
1765 | ||
1766 | lxc_conf_free(c->lxc_conf); | |
1767 | c->lxc_conf = NULL; | |
4df7f012 SH |
1768 | } |
1769 | ||
858377e4 SH |
1770 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1771 | ||
96b3cb40 SH |
1772 | /* |
1773 | * lxcapi_create: | |
1774 | * create a container with the given parameters. | |
1775 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1776 | * configuration already set | |
1777 | * @t: the template to execute to instantiate the root filesystem and | |
1778 | * adjust the configuration. | |
1779 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1780 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1781 | * use. | |
1782 | * | |
1783 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1784 | * arguments, you can just pass NULL. | |
1785 | */ | |
858377e4 | 1786 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1787 | const char *bdevtype, struct bdev_specs *specs, |
1788 | int flags, char *const argv[]) | |
96b3cb40 | 1789 | { |
e9e29a33 | 1790 | int partial_fd; |
51f0f73b | 1791 | mode_t mask; |
96b3cb40 | 1792 | pid_t pid; |
92fa4347 | 1793 | bool ret = false, rootfs_managed = true; |
85db5535 | 1794 | char *tpath = NULL; |
96b3cb40 SH |
1795 | |
1796 | if (!c) | |
1797 | return false; | |
1798 | ||
85db5535 DE |
1799 | if (t) { |
1800 | tpath = get_template_path(t); | |
1801 | if (!tpath) { | |
e9e29a33 | 1802 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1803 | goto out; |
1804 | } | |
96b3cb40 SH |
1805 | } |
1806 | ||
e9e29a33 CB |
1807 | /* If a template is passed in, and the rootfs already is defined in the |
1808 | * container config and exists, then the caller is trying to create an | |
1809 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1810 | */ |
858377e4 | 1811 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1812 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1813 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1814 | c->config_path); | |
6c6892b5 | 1815 | goto free_tpath; |
cf465fe4 SH |
1816 | } |
1817 | ||
6c6892b5 | 1818 | if (!c->lxc_conf) { |
858377e4 | 1819 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1820 | ERROR("Error loading default configuration file %s", |
1821 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1822 | goto free_tpath; |
1823 | } | |
96b3cb40 SH |
1824 | } |
1825 | ||
6c6892b5 DE |
1826 | if (!create_container_dir(c)) |
1827 | goto free_tpath; | |
1828 | ||
92fa4347 CB |
1829 | if (c->lxc_conf->rootfs.path) |
1830 | rootfs_managed = false; | |
1831 | ||
e9e29a33 CB |
1832 | /* If both template and rootfs.path are set, template is setup as |
1833 | * rootfs.path. The container is already created if we have a config and | |
1834 | * rootfs.path is accessible | |
0590e82c | 1835 | */ |
00370edd | 1836 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1837 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1838 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1839 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1840 | goto out; |
1841 | } | |
1842 | ret = true; | |
0590e82c | 1843 | goto out; |
00370edd | 1844 | } |
e9e29a33 CB |
1845 | |
1846 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1847 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1848 | goto out; |
e9e29a33 | 1849 | |
858377e4 | 1850 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1851 | /* Rootfs already existed, user just wanted to save the loaded |
1852 | * configuration. | |
1853 | */ | |
0f4cdd77 | 1854 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1855 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1856 | |
0590e82c SH |
1857 | ret = true; |
1858 | goto out; | |
a69aad27 | 1859 | } |
96b3cb40 SH |
1860 | |
1861 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1862 | partial_fd = create_partial(c); |
1863 | if (partial_fd < 0) | |
96b3cb40 SH |
1864 | goto out; |
1865 | ||
e9e29a33 | 1866 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1867 | |
51f0f73b KR |
1868 | mask = umask(0022); |
1869 | ||
e9e29a33 | 1870 | /* Create the storage. |
96b3cb40 SH |
1871 | * Note we can't do this in the same task as we use to execute the |
1872 | * template because of the way zfs works. | |
1873 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1874 | * namespace. | |
1875 | */ | |
1876 | pid = fork(); | |
1877 | if (pid < 0) { | |
e9e29a33 | 1878 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1879 | goto out_unlock; |
1880 | } | |
1881 | ||
1a0e70ac | 1882 | if (pid == 0) { /* child */ |
10bc1861 | 1883 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1884 | |
10bc1861 CB |
1885 | bdev = do_storage_create(c, bdevtype, specs); |
1886 | if (!bdev) { | |
e9e29a33 CB |
1887 | ERROR("Failed to create %s storage for %s", |
1888 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1889 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1890 | } |
1891 | ||
e9e29a33 | 1892 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1893 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1894 | ERROR("Failed to save initial config for %s", c->name); |
1895 | /* Parent task won't see the storage driver in the | |
1896 | * config so we delete it. | |
1897 | */ | |
96b3cb40 SH |
1898 | bdev->ops->umount(bdev); |
1899 | bdev->ops->destroy(bdev); | |
85aec4ac | 1900 | _exit(EXIT_FAILURE); |
96b3cb40 | 1901 | } |
a73846d8 | 1902 | |
85aec4ac | 1903 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1904 | } |
a73846d8 | 1905 | |
96b3cb40 | 1906 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1907 | goto out_unlock; |
96b3cb40 | 1908 | |
e9e29a33 | 1909 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1910 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1911 | c->lxc_conf = NULL; |
a73846d8 | 1912 | |
96b3cb40 | 1913 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1914 | goto out_unlock; |
96b3cb40 | 1915 | |
dc23c1c8 | 1916 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1917 | goto out_unlock; |
1918 | ||
1a0e70ac CB |
1919 | /* Now clear out the lxc_conf we have, reload from the created |
1920 | * container. | |
1921 | */ | |
858377e4 | 1922 | do_lxcapi_clear_config(c); |
3ce74686 | 1923 | |
9d65a487 KY |
1924 | if (t) { |
1925 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1926 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1927 | goto out_unlock; |
1928 | } | |
3ce74686 | 1929 | } |
a73846d8 | 1930 | |
a69aad27 | 1931 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1932 | |
1933 | out_unlock: | |
51f0f73b | 1934 | umask(mask); |
b20e0599 | 1935 | remove_partial(c, partial_fd); |
a73846d8 | 1936 | |
72d0e1cb | 1937 | out: |
92fa4347 CB |
1938 | if (!ret) { |
1939 | bool reset_managed = c->lxc_conf->rootfs.managed; | |
1940 | ||
1941 | /* | |
1942 | * Ensure that we don't destroy storage we didn't create | |
1943 | * ourselves. | |
1944 | */ | |
1945 | if (!rootfs_managed) | |
1946 | c->lxc_conf->rootfs.managed = false; | |
17a367d8 | 1947 | container_destroy(c, NULL); |
92fa4347 CB |
1948 | c->lxc_conf->rootfs.managed = reset_managed; |
1949 | } | |
a73846d8 | 1950 | |
6c6892b5 | 1951 | free_tpath: |
f10fad2f | 1952 | free(tpath); |
a69aad27 | 1953 | return ret; |
72d0e1cb SG |
1954 | } |
1955 | ||
858377e4 | 1956 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1957 | const char *bdevtype, struct bdev_specs *specs, |
1958 | int flags, char *const argv[]) | |
858377e4 SH |
1959 | { |
1960 | bool ret; | |
a73846d8 | 1961 | |
858377e4 | 1962 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1963 | |
858377e4 SH |
1964 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1965 | current_config = NULL; | |
1966 | return ret; | |
1967 | } | |
1968 | ||
1969 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1970 | { |
9dd54153 | 1971 | int ret; |
3e625e2d | 1972 | pid_t pid; |
dd267776 | 1973 | int rebootsignal = SIGINT; |
3e625e2d SH |
1974 | |
1975 | if (!c) | |
1976 | return false; | |
9dd54153 | 1977 | |
858377e4 | 1978 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1979 | return false; |
9dd54153 | 1980 | |
858377e4 | 1981 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1982 | if (pid <= 0) |
1983 | return false; | |
9dd54153 | 1984 | |
dd267776 BP |
1985 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1986 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
1987 | |
1988 | ret = kill(pid, rebootsignal); | |
1989 | if (ret < 0) { | |
1990 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 1991 | return false; |
591614a7 | 1992 | } |
3e625e2d | 1993 | |
9dd54153 | 1994 | return true; |
3e625e2d SH |
1995 | } |
1996 | ||
858377e4 SH |
1997 | WRAP_API(bool, lxcapi_reboot) |
1998 | ||
d39b10eb CB |
1999 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
2000 | { | |
2001 | int killret, ret; | |
2002 | pid_t pid; | |
2003 | int rebootsignal = SIGINT, state_client_fd = -1; | |
2004 | lxc_state_t states[MAX_STATE] = {0}; | |
2005 | ||
2006 | if (!c) | |
2007 | return false; | |
2008 | ||
2009 | if (!do_lxcapi_is_running(c)) | |
2010 | return true; | |
2011 | ||
2012 | pid = do_lxcapi_init_pid(c); | |
2013 | if (pid <= 0) | |
2014 | return true; | |
2015 | ||
2016 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2017 | rebootsignal = c->lxc_conf->rebootsignal; | |
2018 | ||
2019 | /* Add a new state client before sending the shutdown signal so that we | |
2020 | * don't miss a state. | |
2021 | */ | |
2022 | if (timeout != 0) { | |
2023 | states[RUNNING] = 2; | |
2024 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2025 | &state_client_fd); | |
2026 | if (ret < 0) | |
2027 | return false; | |
2028 | ||
2029 | if (state_client_fd < 0) | |
2030 | return false; | |
2031 | ||
2032 | if (ret == RUNNING) | |
2033 | return true; | |
2034 | ||
2035 | if (ret < MAX_STATE) | |
2036 | return false; | |
2037 | } | |
2038 | ||
2039 | /* Send reboot signal to container. */ | |
2040 | killret = kill(pid, rebootsignal); | |
2041 | if (killret < 0) { | |
d39b10eb CB |
2042 | if (state_client_fd >= 0) |
2043 | close(state_client_fd); | |
a73846d8 | 2044 | |
9dd54153 | 2045 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2046 | return false; |
2047 | } | |
2048 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2049 | ||
a579fa51 | 2050 | if (timeout == 0) |
d39b10eb CB |
2051 | return true; |
2052 | ||
2053 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2054 | close(state_client_fd); | |
2055 | if (ret < 0) | |
2056 | return false; | |
2057 | ||
2058 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2059 | if (ret != RUNNING) | |
2060 | return false; | |
2061 | ||
2062 | return true; | |
2063 | } | |
2064 | ||
2065 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2066 | ||
858377e4 | 2067 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2068 | { |
f8bdb6dc | 2069 | int killret, ret; |
72d0e1cb | 2070 | pid_t pid; |
9dd54153 | 2071 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2072 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2073 | |
2074 | if (!c) | |
2075 | return false; | |
2076 | ||
858377e4 | 2077 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2078 | return true; |
f8bdb6dc | 2079 | |
858377e4 | 2080 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2081 | if (pid <= 0) |
2082 | return true; | |
330ae3d3 CB |
2083 | |
2084 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2085 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2086 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2087 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2088 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2089 | |
92e35018 CB |
2090 | /* Add a new state client before sending the shutdown signal so that we |
2091 | * don't miss a state. | |
2092 | */ | |
f8bdb6dc CB |
2093 | if (timeout != 0) { |
2094 | states[STOPPED] = 1; | |
2095 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2096 | &state_client_fd); | |
2097 | if (ret < 0) | |
2098 | return false; | |
92e35018 | 2099 | |
f8bdb6dc CB |
2100 | if (state_client_fd < 0) |
2101 | return false; | |
2102 | ||
2103 | if (ret == STOPPED) | |
2104 | return true; | |
591614a7 | 2105 | |
f8bdb6dc | 2106 | if (ret < MAX_STATE) |
92e35018 | 2107 | return false; |
92e35018 CB |
2108 | } |
2109 | ||
f8bdb6dc CB |
2110 | /* Send shutdown signal to container. */ |
2111 | killret = kill(pid, haltsignal); | |
2112 | if (killret < 0) { | |
f8bdb6dc CB |
2113 | if (state_client_fd >= 0) |
2114 | close(state_client_fd); | |
a73846d8 | 2115 | |
9dd54153 | 2116 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2117 | return false; |
2118 | } | |
2119 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2120 | ||
923929f6 | 2121 | if (timeout == 0) |
f8bdb6dc CB |
2122 | return true; |
2123 | ||
2124 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2125 | close(state_client_fd); | |
2126 | if (ret < 0) | |
2127 | return false; | |
2128 | ||
2129 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2130 | if (ret != STOPPED) | |
2131 | return false; | |
2132 | ||
2133 | return true; | |
72d0e1cb SG |
2134 | } |
2135 | ||
858377e4 SH |
2136 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2137 | ||
1897e3bc | 2138 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2139 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2140 | { |
2141 | bool bret = false; | |
a0e93eeb | 2142 | char **args = NULL; |
72d0e1cb | 2143 | va_list ap; |
72d0e1cb SG |
2144 | |
2145 | if (!c) | |
2146 | return false; | |
2147 | ||
858377e4 SH |
2148 | current_config = c->lxc_conf; |
2149 | ||
72d0e1cb SG |
2150 | /* |
2151 | * since we're going to wait for create to finish, I don't think we | |
2152 | * need to get a copy of the arguments. | |
2153 | */ | |
dc23c1c8 | 2154 | va_start(ap, flags); |
a0e93eeb | 2155 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2156 | va_end(ap); |
a0e93eeb | 2157 | if (!args) { |
e9e29a33 | 2158 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2159 | goto out; |
2160 | } | |
72d0e1cb | 2161 | |
858377e4 | 2162 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2163 | |
2164 | out: | |
a0e93eeb | 2165 | free(args); |
858377e4 | 2166 | current_config = NULL; |
72d0e1cb SG |
2167 | return bret; |
2168 | } | |
2169 | ||
6b0d5538 SH |
2170 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2171 | { | |
4222a9f4 CB |
2172 | if (!strcmp(key, "lxc.cgroup")) |
2173 | return clear_unexp_config_line(conf, key, true); | |
2174 | ||
2175 | if (!strcmp(key, "lxc.network")) | |
2176 | return clear_unexp_config_line(conf, key, true); | |
2177 | ||
2178 | if (!strcmp(key, "lxc.net")) | |
2179 | return clear_unexp_config_line(conf, key, true); | |
2180 | ||
2181 | /* Clear a network with a specific index. */ | |
2182 | if (!strncmp(key, "lxc.net.", 8)) { | |
2183 | int ret; | |
2184 | const char *idx; | |
2185 | ||
2186 | idx = key + 8; | |
2187 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2188 | if (!ret) | |
2189 | return clear_unexp_config_line(conf, key, true); | |
2190 | } | |
2191 | ||
2192 | if (!strcmp(key, "lxc.hook")) | |
2193 | return clear_unexp_config_line(conf, key, true); | |
2194 | ||
2195 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2196 | } |
2197 | ||
6afd673f CB |
2198 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2199 | const char *key) | |
72d0e1cb | 2200 | { |
6afd673f CB |
2201 | int ret = 1; |
2202 | struct lxc_config_t *config; | |
72d0e1cb SG |
2203 | |
2204 | if (!c || !c->lxc_conf) | |
2205 | return false; | |
6afd673f | 2206 | |
5cee8c50 | 2207 | if (container_mem_lock(c)) |
72d0e1cb | 2208 | return false; |
6afd673f | 2209 | |
300df83e | 2210 | config = lxc_get_config(key); |
6afd673f CB |
2211 | /* Verify that the config key exists and that it has a callback |
2212 | * implemented. | |
2213 | */ | |
2214 | if (config && config->clr) | |
26471403 | 2215 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2216 | |
6b0d5538 SH |
2217 | if (!ret) |
2218 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2219 | |
5cee8c50 | 2220 | container_mem_unlock(c); |
72d0e1cb SG |
2221 | return ret == 0; |
2222 | } | |
2223 | ||
858377e4 SH |
2224 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2225 | ||
e0f59189 | 2226 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2227 | { |
858377e4 | 2228 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2229 | |
caab004f TA |
2230 | if (pid < 0) |
2231 | return false; | |
2232 | ||
a73846d8 | 2233 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2234 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2235 | if (!switch_to_ns(pid, "user")) |
2236 | return false; | |
a73846d8 | 2237 | |
51d0854c | 2238 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2239 | } |
2240 | ||
1a0e70ac | 2241 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2242 | static inline int string_cmp(char **first, char **second) |
2243 | { | |
2244 | return strcmp(*first, *second); | |
2245 | } | |
2246 | ||
1a0e70ac CB |
2247 | /* Used by qsort and bsearch functions for comparing container names. */ |
2248 | static inline int container_cmp(struct lxc_container **first, | |
2249 | struct lxc_container **second) | |
9c88ff1f ÇO |
2250 | { |
2251 | return strcmp((*first)->name, (*second)->name); | |
2252 | } | |
2253 | ||
2254 | static bool add_to_array(char ***names, char *cname, int pos) | |
2255 | { | |
2256 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2257 | if (!newnames) { | |
2258 | ERROR("Out of memory"); | |
2259 | return false; | |
2260 | } | |
2261 | ||
2262 | *names = newnames; | |
2263 | newnames[pos] = strdup(cname); | |
2264 | if (!newnames[pos]) | |
2265 | return false; | |
2266 | ||
3b034c39 | 2267 | /* Sort the array as we will use binary search on it. */ |
1a0e70ac CB |
2268 | qsort(newnames, pos + 1, sizeof(char *), |
2269 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2270 | |
2271 | return true; | |
2272 | } | |
2273 | ||
1a0e70ac CB |
2274 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2275 | int pos, bool sort) | |
9c88ff1f | 2276 | { |
1a0e70ac | 2277 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2278 | if (!newlist) { |
2279 | ERROR("Out of memory"); | |
2280 | return false; | |
2281 | } | |
2282 | ||
2283 | *list = newlist; | |
2284 | newlist[pos] = c; | |
2285 | ||
3b034c39 | 2286 | /* Sort the array as we will use binary search on it. */ |
2871830a | 2287 | if (sort) |
1a0e70ac CB |
2288 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2289 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2290 | |
2291 | return true; | |
2292 | } | |
2293 | ||
2294 | static char** get_from_array(char ***names, char *cname, int size) | |
2295 | { | |
2296 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2297 | } | |
2298 | ||
a73846d8 | 2299 | static bool array_contains(char ***names, char *cname, int size) |
2300 | { | |
9c88ff1f ÇO |
2301 | if(get_from_array(names, cname, size) != NULL) |
2302 | return true; | |
a73846d8 | 2303 | |
9c88ff1f ÇO |
2304 | return false; |
2305 | } | |
2306 | ||
2307 | static bool remove_from_array(char ***names, char *cname, int size) | |
2308 | { | |
2309 | char **result = get_from_array(names, cname, size); | |
2310 | if (result != NULL) { | |
2311 | free(result); | |
2312 | return true; | |
2313 | } | |
a73846d8 | 2314 | |
9c88ff1f ÇO |
2315 | return false; |
2316 | } | |
2317 | ||
9f4866a6 | 2318 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2319 | { |
ae22a220 ÇO |
2320 | pid_t pid; |
2321 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2322 | char **interfaces = NULL; |
ae22a220 | 2323 | char interface[IFNAMSIZ]; |
799f29ab | 2324 | |
0ac84f04 | 2325 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2326 | return NULL; |
c868b261 | 2327 | |
ae22a220 ÇO |
2328 | pid = fork(); |
2329 | if (pid < 0) { | |
9f4866a6 | 2330 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2331 | close(pipefd[0]); |
2332 | close(pipefd[1]); | |
2333 | return NULL; | |
2334 | } | |
799f29ab | 2335 | |
1a0e70ac | 2336 | if (pid == 0) { /* child */ |
ae22a220 | 2337 | int ret = 1, nbytes; |
b1e44ed1 | 2338 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
ae22a220 ÇO |
2339 | |
2340 | /* close the read-end of the pipe */ | |
2341 | close(pipefd[0]); | |
2342 | ||
e0f59189 | 2343 | if (!enter_net_ns(c)) { |
9f4866a6 | 2344 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2345 | goto out; |
2346 | } | |
2347 | ||
2348 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2349 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
9f4866a6 | 2350 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2351 | goto out; |
2352 | } | |
2353 | ||
2354 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2355 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2356 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2357 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2358 | if (nbytes < 0) |
ae22a220 | 2359 | goto out; |
9f4866a6 | 2360 | |
ae22a220 ÇO |
2361 | count++; |
2362 | } | |
a73846d8 | 2363 | |
ae22a220 ÇO |
2364 | ret = 0; |
2365 | ||
2366 | out: | |
2367 | if (interfaceArray) | |
b1e44ed1 | 2368 | netns_freeifaddrs(interfaceArray); |
ae22a220 ÇO |
2369 | |
2370 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2371 | close(pipefd[1]); | |
02c611b0 | 2372 | _exit(ret); |
799f29ab ÇO |
2373 | } |
2374 | ||
ae22a220 ÇO |
2375 | /* close the write-end of the pipe */ |
2376 | close(pipefd[1]); | |
2377 | ||
3e1e9db8 | 2378 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2379 | interface[IFNAMSIZ - 1] = '\0'; |
2380 | ||
ae22a220 | 2381 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2382 | continue; |
799f29ab | 2383 | |
9f4866a6 | 2384 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2385 | ERROR("Failed to add \"%s\" to array", interface); |
2386 | ||
9c88ff1f ÇO |
2387 | count++; |
2388 | } | |
799f29ab | 2389 | |
ae22a220 | 2390 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2391 | for (i = 0; i < count; i++) |
ae22a220 | 2392 | free(interfaces[i]); |
a73846d8 | 2393 | |
ae22a220 ÇO |
2394 | free(interfaces); |
2395 | interfaces = NULL; | |
2396 | } | |
9c88ff1f | 2397 | |
ae22a220 ÇO |
2398 | /* close the read-end of the pipe */ |
2399 | close(pipefd[0]); | |
799f29ab | 2400 | |
9c88ff1f | 2401 | /* Append NULL to the array */ |
9f4866a6 | 2402 | if (interfaces) |
9c88ff1f | 2403 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2404 | |
9c88ff1f | 2405 | return interfaces; |
799f29ab ÇO |
2406 | } |
2407 | ||
858377e4 SH |
2408 | WRAP_API(char **, lxcapi_get_interfaces) |
2409 | ||
02a0e184 CB |
2410 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2411 | const char *family, int scope) | |
799f29ab | 2412 | { |
02a0e184 | 2413 | int i, ret; |
ae22a220 | 2414 | pid_t pid; |
02a0e184 | 2415 | int pipefd[2]; |
ae22a220 | 2416 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2417 | int count = 0; |
2418 | char **addresses = NULL; | |
799f29ab | 2419 | |
0ac84f04 | 2420 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2421 | if (ret < 0) { |
2422 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2423 | return NULL; |
c868b261 ÇO |
2424 | } |
2425 | ||
ae22a220 ÇO |
2426 | pid = fork(); |
2427 | if (pid < 0) { | |
02a0e184 | 2428 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2429 | close(pipefd[0]); |
2430 | close(pipefd[1]); | |
2431 | return NULL; | |
9c83a661 SG |
2432 | } |
2433 | ||
02a0e184 CB |
2434 | if (pid == 0) { |
2435 | ssize_t nbytes; | |
ae22a220 | 2436 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
a7547c5c | 2437 | char *address_ptr = NULL; |
02a0e184 | 2438 | void *tempAddrPtr = NULL; |
b1e44ed1 | 2439 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
fe218ca3 | 2440 | |
ae22a220 ÇO |
2441 | /* close the read-end of the pipe */ |
2442 | close(pipefd[0]); | |
2443 | ||
e0f59189 | 2444 | if (!enter_net_ns(c)) { |
02a0e184 | 2445 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2446 | goto out; |
9c83a661 | 2447 | } |
ae22a220 ÇO |
2448 | |
2449 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2450 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
02a0e184 | 2451 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2452 | goto out; |
2453 | } | |
2454 | ||
2455 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2456 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2457 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2458 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2459 | continue; |
2460 | ||
6ce39620 CB |
2461 | #pragma GCC diagnostic push |
2462 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2463 | ||
02a0e184 | 2464 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2465 | if (family && strcmp(family, "inet")) |
2466 | continue; | |
02a0e184 | 2467 | |
ae22a220 | 2468 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2469 | } else { |
ae22a220 ÇO |
2470 | if (family && strcmp(family, "inet6")) |
2471 | continue; | |
2472 | ||
2473 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2474 | continue; | |
2475 | ||
2476 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2477 | } | |
2478 | ||
6ce39620 CB |
2479 | #pragma GCC diagnostic pop |
2480 | ||
ae22a220 ÇO |
2481 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) |
2482 | continue; | |
2483 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2484 | continue; |
2485 | ||
a7547c5c | 2486 | address_ptr = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2487 | tempAddrPtr, addressOutputBuffer, |
2488 | sizeof(addressOutputBuffer)); | |
a7547c5c | 2489 | if (!address_ptr) |
02a0e184 | 2490 | continue; |
ae22a220 | 2491 | |
a7547c5c | 2492 | nbytes = lxc_write_nointr(pipefd[1], address_ptr, INET6_ADDRSTRLEN); |
02a0e184 CB |
2493 | if (nbytes != INET6_ADDRSTRLEN) { |
2494 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
a7547c5c | 2495 | address_ptr); |
ae22a220 ÇO |
2496 | goto out; |
2497 | } | |
a73846d8 | 2498 | |
ae22a220 | 2499 | count++; |
9c83a661 | 2500 | } |
a73846d8 | 2501 | |
ae22a220 | 2502 | ret = 0; |
9c83a661 | 2503 | |
ae22a220 | 2504 | out: |
02a0e184 | 2505 | if (interfaceArray) |
b1e44ed1 | 2506 | netns_freeifaddrs(interfaceArray); |
9c83a661 | 2507 | |
ae22a220 ÇO |
2508 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2509 | close(pipefd[1]); | |
fe1ce58c | 2510 | _exit(ret); |
6849cb5b | 2511 | } |
9c83a661 | 2512 | |
ae22a220 ÇO |
2513 | /* close the write-end of the pipe */ |
2514 | close(pipefd[1]); | |
2515 | ||
02a0e184 CB |
2516 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2517 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2518 | ||
2519 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2520 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2521 | |
9c88ff1f | 2522 | count++; |
9c83a661 SG |
2523 | } |
2524 | ||
ae22a220 | 2525 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2526 | for (i = 0; i < count; i++) |
ae22a220 | 2527 | free(addresses[i]); |
02a0e184 | 2528 | |
ae22a220 ÇO |
2529 | free(addresses); |
2530 | addresses = NULL; | |
2531 | } | |
9c83a661 | 2532 | |
ae22a220 ÇO |
2533 | /* close the read-end of the pipe */ |
2534 | close(pipefd[0]); | |
9c83a661 SG |
2535 | |
2536 | /* Append NULL to the array */ | |
02a0e184 | 2537 | if (addresses) |
9c88ff1f | 2538 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2539 | |
2540 | return addresses; | |
2541 | } | |
2542 | ||
858377e4 SH |
2543 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2544 | ||
2545 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2546 | { |
fce687aa CB |
2547 | int ret = -1; |
2548 | struct lxc_config_t *config; | |
72d0e1cb SG |
2549 | |
2550 | if (!c || !c->lxc_conf) | |
2551 | return -1; | |
fce687aa | 2552 | |
5cee8c50 | 2553 | if (container_mem_lock(c)) |
72d0e1cb | 2554 | return -1; |
fce687aa | 2555 | |
300df83e | 2556 | config = lxc_get_config(key); |
fce687aa CB |
2557 | /* Verify that the config key exists and that it has a callback |
2558 | * implemented. | |
2559 | */ | |
2560 | if (config && config->get) | |
cccd2219 | 2561 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2562 | |
5cee8c50 | 2563 | container_mem_unlock(c); |
72d0e1cb SG |
2564 | return ret; |
2565 | } | |
2566 | ||
858377e4 SH |
2567 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2568 | ||
2569 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2570 | { |
2571 | char *ret; | |
2572 | ||
2573 | if (!c || !c->lxc_conf) | |
2574 | return NULL; | |
a73846d8 | 2575 | |
8ac18377 ÇO |
2576 | if (container_mem_lock(c)) |
2577 | return NULL; | |
a73846d8 | 2578 | |
858377e4 | 2579 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2580 | container_mem_unlock(c); |
2581 | return ret; | |
2582 | } | |
2583 | ||
858377e4 SH |
2584 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2585 | ||
2586 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2587 | { |
300df83e CB |
2588 | int ret = -1; |
2589 | ||
2590 | /* List all config items. */ | |
72d0e1cb | 2591 | if (!key) |
cfc67626 | 2592 | return lxc_list_config_items(retv, inlen); |
300df83e | 2593 | |
72d0e1cb SG |
2594 | if (!c || !c->lxc_conf) |
2595 | return -1; | |
300df83e | 2596 | |
5cee8c50 | 2597 | if (container_mem_lock(c)) |
72d0e1cb | 2598 | return -1; |
300df83e CB |
2599 | |
2600 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2601 | * This is an intelligent result to show which keys are valid given the | |
2602 | * type of nic it is. | |
2603 | */ | |
6fba98b5 | 2604 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2605 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2606 | else |
2607 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2608 | |
5cee8c50 | 2609 | container_mem_unlock(c); |
72d0e1cb SG |
2610 | return ret; |
2611 | } | |
2612 | ||
858377e4 SH |
2613 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2614 | ||
2615 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2616 | { |
0e1a60b0 | 2617 | int fd, lret; |
39dc698c | 2618 | bool ret = false, need_disklock = false; |
39dc698c | 2619 | |
72d0e1cb SG |
2620 | if (!alt_file) |
2621 | alt_file = c->configfile; | |
a73846d8 | 2622 | |
72d0e1cb | 2623 | if (!alt_file) |
1a0e70ac | 2624 | return false; |
39dc698c | 2625 | |
1a0e70ac | 2626 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2627 | if (!c->lxc_conf) { |
858377e4 | 2628 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2629 | ERROR("Error loading default configuration file %s " |
2630 | "while saving %s", | |
2631 | lxc_global_config_value("lxc.default_config"), | |
2632 | c->name); | |
72d0e1cb SG |
2633 | return false; |
2634 | } | |
39dc698c | 2635 | } |
72d0e1cb | 2636 | |
5a3d2e1e SG |
2637 | if (!create_container_dir(c)) |
2638 | return false; | |
2639 | ||
1a0e70ac CB |
2640 | /* If we're writing to the container's config file, take the disk lock. |
2641 | * Otherwise just take the memlock to protect the struct lxc_container | |
2642 | * while we're traversing it. | |
39dc698c SH |
2643 | */ |
2644 | if (strcmp(c->configfile, alt_file) == 0) | |
2645 | need_disklock = true; | |
2646 | ||
2647 | if (need_disklock) | |
2648 | lret = container_disk_lock(c); | |
2649 | else | |
2650 | lret = container_mem_lock(c); | |
39dc698c | 2651 | if (lret) |
72d0e1cb | 2652 | return false; |
39dc698c | 2653 | |
10034af5 | 2654 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2655 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2656 | if (fd < 0) |
2657 | goto on_error; | |
2658 | ||
2659 | lret = write_config(fd, c->lxc_conf); | |
2660 | close(fd); | |
2661 | if (lret < 0) | |
2662 | goto on_error; | |
2663 | ||
39dc698c SH |
2664 | ret = true; |
2665 | ||
0e1a60b0 | 2666 | on_error: |
39dc698c SH |
2667 | if (need_disklock) |
2668 | container_disk_unlock(c); | |
2669 | else | |
2670 | container_mem_unlock(c); | |
0e1a60b0 | 2671 | |
39dc698c | 2672 | return ret; |
72d0e1cb SG |
2673 | } |
2674 | ||
858377e4 SH |
2675 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2676 | ||
0ea055b3 CB |
2677 | |
2678 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2679 | { |
0ea055b3 CB |
2680 | FILE *f1; |
2681 | struct stat fbuf; | |
42342bed CB |
2682 | void *buf = NULL; |
2683 | char *del = NULL; | |
8a22c168 CB |
2684 | char path[PATH_MAX]; |
2685 | char newpath[PATH_MAX]; | |
0ea055b3 | 2686 | int fd, ret, n = 0, v = 0; |
dfb31b25 | 2687 | bool bret = false; |
42342bed | 2688 | size_t len = 0, bytes = 0; |
dfb31b25 | 2689 | |
0ea055b3 | 2690 | if (container_disk_lock(c0)) |
dfb31b25 | 2691 | return false; |
0ea055b3 | 2692 | |
8a22c168 CB |
2693 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c0->config_path, c0->name); |
2694 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2695 | goto out; |
a73846d8 | 2696 | |
8a22c168 CB |
2697 | ret = snprintf(newpath, PATH_MAX, "%s\n%s\n", c->config_path, c->name); |
2698 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2699 | goto out; |
0ea055b3 CB |
2700 | |
2701 | /* If we find an lxc-snapshot file using the old format only listing the | |
2702 | * number of snapshots we will keep using it. */ | |
2703 | f1 = fopen(path, "r"); | |
2704 | if (f1) { | |
2705 | n = fscanf(f1, "%d", &v); | |
2706 | fclose(f1); | |
2707 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2708 | ret = remove(path); |
2709 | if (ret < 0) | |
6d1400b5 | 2710 | SYSERROR("Failed to remove \"%s\"", path); |
2711 | ||
0ea055b3 CB |
2712 | n = 0; |
2713 | } | |
dfb31b25 | 2714 | } |
6d1400b5 | 2715 | |
0ea055b3 CB |
2716 | if (n == 1) { |
2717 | v += inc ? 1 : -1; | |
2718 | f1 = fopen(path, "w"); | |
2719 | if (!f1) | |
2720 | goto out; | |
6d1400b5 | 2721 | |
0ea055b3 CB |
2722 | if (fprintf(f1, "%d\n", v) < 0) { |
2723 | ERROR("Error writing new snapshots value"); | |
2724 | fclose(f1); | |
2725 | goto out; | |
2726 | } | |
6d1400b5 | 2727 | |
0ea055b3 CB |
2728 | ret = fclose(f1); |
2729 | if (ret != 0) { | |
2730 | SYSERROR("Error writing to or closing snapshots file"); | |
2731 | goto out; | |
2732 | } | |
2733 | } else { | |
2734 | /* Here we know that we have or can use an lxc-snapshot file | |
2735 | * using the new format. */ | |
2736 | if (inc) { | |
2737 | f1 = fopen(path, "a"); | |
2738 | if (!f1) | |
2739 | goto out; | |
2740 | ||
2741 | if (fprintf(f1, "%s", newpath) < 0) { | |
2742 | ERROR("Error writing new snapshots entry"); | |
2743 | ret = fclose(f1); | |
2744 | if (ret != 0) | |
2745 | SYSERROR("Error writing to or closing snapshots file"); | |
2746 | goto out; | |
2747 | } | |
2748 | ||
2749 | ret = fclose(f1); | |
2750 | if (ret != 0) { | |
2751 | SYSERROR("Error writing to or closing snapshots file"); | |
2752 | goto out; | |
2753 | } | |
2754 | } else if (!inc) { | |
d028235d SG |
2755 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2756 | goto out; | |
2757 | ||
2758 | if (fstat(fd, &fbuf) < 0) { | |
2759 | close(fd); | |
2760 | goto out; | |
2761 | } | |
2762 | ||
2763 | if (fbuf.st_size != 0) { | |
25086a5f | 2764 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2765 | if (buf == MAP_FAILED) { |
2766 | SYSERROR("Failed to create mapping %s", path); | |
2767 | close(fd); | |
2768 | goto out; | |
2769 | } | |
2770 | ||
2771 | len = strlen(newpath); | |
2772 | while ((del = strstr((char *)buf, newpath))) { | |
2773 | memmove(del, del + len, strlen(del) - len + 1); | |
2774 | bytes += len; | |
2775 | } | |
2776 | ||
25086a5f | 2777 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2778 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2779 | SYSERROR("Failed to truncate file %s", path); | |
2780 | close(fd); | |
2781 | goto out; | |
2782 | } | |
2783 | } | |
a73846d8 | 2784 | |
d028235d SG |
2785 | close(fd); |
2786 | } | |
0ea055b3 CB |
2787 | |
2788 | /* If the lxc-snapshot file is empty, remove it. */ | |
2789 | if (stat(path, &fbuf) < 0) | |
2790 | goto out; | |
6d1400b5 | 2791 | |
d028235d | 2792 | if (!fbuf.st_size) { |
71261a5c CB |
2793 | ret = remove(path); |
2794 | if (ret < 0) | |
2795 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2796 | } |
dfb31b25 SH |
2797 | } |
2798 | ||
2799 | bret = true; | |
2800 | ||
2801 | out: | |
0ea055b3 | 2802 | container_disk_unlock(c0); |
dfb31b25 SH |
2803 | return bret; |
2804 | } | |
2805 | ||
d825fff3 | 2806 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2807 | { |
2808 | struct lxc_container *p; | |
8a22c168 | 2809 | char *lxcpath = NULL, *lxcname = NULL, path[PATH_MAX]; |
dfb31b25 SH |
2810 | size_t pathlen = 0, namelen = 0; |
2811 | FILE *f; | |
2812 | int ret; | |
2813 | ||
8a22c168 | 2814 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", |
dfb31b25 | 2815 | c->config_path, c->name); |
8a22c168 | 2816 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
2817 | ERROR("Path name too long"); |
2818 | return; | |
2819 | } | |
a73846d8 | 2820 | |
025ed0f3 | 2821 | f = fopen(path, "r"); |
025ed0f3 | 2822 | if (f == NULL) |
dfb31b25 | 2823 | return; |
a73846d8 | 2824 | |
dfb31b25 SH |
2825 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2826 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2827 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2828 | goto out; |
2829 | } | |
7ad37670 CB |
2830 | |
2831 | remove_trailing_newlines(lxcpath); | |
2832 | remove_trailing_newlines(lxcname); | |
2833 | ||
dfb31b25 SH |
2834 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2835 | ERROR("Unable to find dependent container %s:%s", | |
2836 | lxcpath, lxcname); | |
2837 | continue; | |
2838 | } | |
a73846d8 | 2839 | |
0ea055b3 CB |
2840 | if (!mod_rdep(p, c, inc)) |
2841 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2842 | lxcpath, lxcname); |
a73846d8 | 2843 | |
dfb31b25 SH |
2844 | lxc_container_put(p); |
2845 | } | |
a73846d8 | 2846 | |
dfb31b25 | 2847 | out: |
f10fad2f ME |
2848 | free(lxcpath); |
2849 | free(lxcname); | |
dfb31b25 SH |
2850 | fclose(f); |
2851 | } | |
2852 | ||
18aa217b | 2853 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2854 | { |
0ea055b3 | 2855 | FILE *f; |
8a22c168 | 2856 | char path[PATH_MAX]; |
dfb31b25 | 2857 | int ret, v; |
0ea055b3 | 2858 | struct stat fbuf; |
dfb31b25 SH |
2859 | bool bret = false; |
2860 | ||
8a22c168 | 2861 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c->config_path, |
dfb31b25 | 2862 | c->name); |
8a22c168 | 2863 | if (ret < 0 || ret > PATH_MAX) |
dfb31b25 | 2864 | goto out; |
a73846d8 | 2865 | |
0ea055b3 CB |
2866 | /* If the file doesn't exist there are no snapshots. */ |
2867 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2868 | goto out; |
a73846d8 | 2869 | |
0ea055b3 CB |
2870 | v = fbuf.st_size; |
2871 | if (v != 0) { | |
2872 | f = fopen(path, "r"); | |
2873 | if (!f) | |
2874 | goto out; | |
a73846d8 | 2875 | |
0ea055b3 CB |
2876 | ret = fscanf(f, "%d", &v); |
2877 | fclose(f); | |
1a0e70ac | 2878 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2879 | if (ret != 1) |
2880 | INFO("Container uses new lxc-snapshots format %s", path); | |
2881 | } | |
a73846d8 | 2882 | |
dfb31b25 SH |
2883 | bret = v != 0; |
2884 | ||
2885 | out: | |
2886 | return bret; | |
2887 | } | |
2888 | ||
18aa217b SH |
2889 | static bool has_snapshots(struct lxc_container *c) |
2890 | { | |
8a22c168 | 2891 | char path[PATH_MAX]; |
74f96976 | 2892 | struct dirent *direntp; |
18aa217b SH |
2893 | int count=0; |
2894 | DIR *dir; | |
2895 | ||
2896 | if (!get_snappath_dir(c, path)) | |
2897 | return false; | |
a73846d8 | 2898 | |
18aa217b SH |
2899 | dir = opendir(path); |
2900 | if (!dir) | |
2901 | return false; | |
a73846d8 | 2902 | |
74f96976 | 2903 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2904 | if (!strcmp(direntp->d_name, ".")) |
2905 | continue; | |
2906 | ||
2907 | if (!strcmp(direntp->d_name, "..")) | |
2908 | continue; | |
2909 | count++; | |
2910 | break; | |
2911 | } | |
a73846d8 | 2912 | |
18aa217b SH |
2913 | closedir(dir); |
2914 | return count > 0; | |
2915 | } | |
2916 | ||
297c2d58 | 2917 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2918 | int ret; |
2919 | ||
e0010464 | 2920 | if (am_guest_unpriv()) { |
ee484f7f CB |
2921 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2922 | "storage_destroy_wrapper"); | |
2923 | if (ret < 0) | |
d028235d | 2924 | return false; |
ee484f7f | 2925 | |
d028235d SG |
2926 | return true; |
2927 | } | |
ee484f7f | 2928 | |
10bc1861 | 2929 | return storage_destroy(conf); |
297c2d58 CB |
2930 | } |
2931 | ||
4355ab5f SH |
2932 | static int lxc_rmdir_onedev_wrapper(void *data) |
2933 | { | |
2934 | char *arg = (char *) data; | |
18aa217b | 2935 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2936 | } |
2937 | ||
17a367d8 | 2938 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2939 | { |
17a367d8 CB |
2940 | char *arg = data; |
2941 | return unlink(arg); | |
2942 | } | |
2943 | ||
2944 | static bool container_destroy(struct lxc_container *c, | |
2945 | struct lxc_storage *storage) | |
2946 | { | |
2947 | const char *p1; | |
2948 | size_t len; | |
2949 | struct lxc_conf *conf; | |
2950 | char *path = NULL; | |
c868b261 | 2951 | bool bret = false; |
297c2d58 | 2952 | int ret = 0; |
72d0e1cb | 2953 | |
858377e4 | 2954 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2955 | return false; |
2956 | ||
a70a69e8 | 2957 | conf = c->lxc_conf; |
3bc449ed | 2958 | if (container_disk_lock(c)) |
72d0e1cb | 2959 | return false; |
72d0e1cb | 2960 | |
39dc698c | 2961 | if (!is_stopped(c)) { |
1a0e70ac | 2962 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2963 | ERROR("container %s is not stopped", c->name); |
2964 | goto out; | |
72d0e1cb SG |
2965 | } |
2966 | ||
a70a69e8 | 2967 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2968 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2969 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2970 | SYSERROR("Failed to set environment variable for container name"); |
2971 | ||
2972 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2973 | SYSERROR("Failed to set environment variable for config path"); | |
2974 | ||
2975 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2976 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2977 | ||
2978 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2979 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2980 | ||
2981 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2982 | SYSERROR("Failed to set environment variable for console path"); | |
2983 | ||
2984 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2985 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2986 | /* End of environment variable setup for hooks */ |
2987 | ||
14a7b0f9 | 2988 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2989 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2990 | goto out; |
2991 | } | |
2992 | } | |
2993 | ||
2994 | if (current_config && conf == current_config) { | |
858377e4 | 2995 | current_config = NULL; |
a73846d8 | 2996 | |
37cf711b SY |
2997 | if (conf->logfd != -1) { |
2998 | close(conf->logfd); | |
2999 | conf->logfd = -1; | |
858377e4 SH |
3000 | } |
3001 | } | |
3002 | ||
6e54330c CB |
3003 | /* LXC is not managing the storage of the container. */ |
3004 | if (conf && !conf->rootfs.managed) | |
3005 | goto on_success; | |
3006 | ||
d028235d SG |
3007 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
3008 | if (!do_destroy_container(conf)) { | |
3009 | ERROR("Error destroying rootfs for %s", c->name); | |
3010 | goto out; | |
3011 | } | |
3012 | INFO("Destroyed rootfs for %s", c->name); | |
3013 | } | |
60bf62d4 | 3014 | |
dfb31b25 SH |
3015 | mod_all_rdeps(c, false); |
3016 | ||
17a367d8 CB |
3017 | p1 = do_lxcapi_get_config_path(c); |
3018 | /* strlen(p1) | |
3019 | * + | |
3020 | * / | |
3021 | * + | |
3022 | * strlen(c->name) | |
3023 | * + | |
3024 | * / | |
3025 | * + | |
3026 | * strlen("config") = 6 | |
3027 | * + | |
3028 | * \0 | |
3029 | */ | |
3030 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
3031 | path = malloc(len); | |
3032 | if (!path) { | |
3033 | ERROR("Failed to allocate memory"); | |
3034 | goto out; | |
3035 | } | |
3036 | ||
3037 | /* For an overlay container the rootfs is considered immutable and | |
3038 | * cannot be removed when restoring from a snapshot. | |
3039 | */ | |
3040 | if (storage && (!strcmp(storage->type, "overlay") || | |
3041 | !strcmp(storage->type, "overlayfs")) && | |
3042 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3043 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
3044 | if (ret < 0 || (size_t)ret >= len) | |
3045 | goto out; | |
3046 | ||
e0010464 | 3047 | if (am_guest_unpriv()) |
17a367d8 CB |
3048 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3049 | "lxc_unlink_exec_wrapper"); | |
3050 | else | |
3051 | ret = unlink(path); | |
3052 | if (ret < 0) { | |
3053 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3054 | path, c->name); | |
3055 | goto out; | |
3056 | } | |
3057 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3058 | ||
3059 | bret = true; | |
3060 | goto out; | |
3061 | } | |
3062 | ||
3063 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3064 | if (ret < 0 || (size_t)ret >= len) | |
3065 | goto out; | |
a73846d8 | 3066 | |
e0010464 | 3067 | if (am_guest_unpriv()) |
ee484f7f CB |
3068 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3069 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3070 | else |
18aa217b | 3071 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3072 | if (ret < 0) { |
17a367d8 CB |
3073 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3074 | c->name); | |
60bf62d4 SH |
3075 | goto out; |
3076 | } | |
17a367d8 | 3077 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3078 | |
6e54330c | 3079 | on_success: |
fef48dc9 | 3080 | bret = true; |
60bf62d4 SH |
3081 | |
3082 | out: | |
17a367d8 CB |
3083 | if (path) |
3084 | free(path); | |
a73846d8 | 3085 | |
3bc449ed | 3086 | container_disk_unlock(c); |
fef48dc9 | 3087 | return bret; |
72d0e1cb SG |
3088 | } |
3089 | ||
858377e4 | 3090 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3091 | { |
3092 | if (!c || !lxcapi_is_defined(c)) | |
3093 | return false; | |
2b2655a8 | 3094 | |
6e54330c CB |
3095 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3096 | if (has_snapshots(c)) { | |
3097 | ERROR("Container %s has snapshots; not removing", c->name); | |
3098 | return false; | |
3099 | } | |
18aa217b | 3100 | |
6e54330c CB |
3101 | if (has_fs_snapshots(c)) { |
3102 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3103 | return false; | |
3104 | } | |
18aa217b SH |
3105 | } |
3106 | ||
17a367d8 | 3107 | return container_destroy(c, NULL); |
18aa217b SH |
3108 | } |
3109 | ||
858377e4 | 3110 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3111 | |
858377e4 | 3112 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3113 | { |
3114 | if (!c || !lxcapi_is_defined(c)) | |
3115 | return false; | |
a73846d8 | 3116 | |
18aa217b SH |
3117 | if (!lxcapi_snapshot_destroy_all(c)) { |
3118 | ERROR("Error deleting all snapshots"); | |
3119 | return false; | |
3120 | } | |
a73846d8 | 3121 | |
18aa217b SH |
3122 | return lxcapi_destroy(c); |
3123 | } | |
3124 | ||
858377e4 SH |
3125 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3126 | ||
0d9cd9c3 CB |
3127 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3128 | const char *v) | |
96532523 | 3129 | { |
0d9cd9c3 | 3130 | int ret; |
96532523 | 3131 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3132 | bool bret = true; |
3133 | ||
3134 | config = lxc_get_config(key); | |
3135 | if (!config) | |
3136 | return -EINVAL; | |
3137 | ||
3138 | ret = config->set(key, v, conf, NULL); | |
3139 | if (ret < 0) | |
3140 | return -EINVAL; | |
3141 | ||
3142 | if (lxc_config_value_empty(v)) | |
3143 | do_clear_unexp_config_line(conf, key); | |
3144 | else | |
3145 | bret = do_append_unexp_config_line(conf, key, v); | |
3146 | if (!bret) | |
3147 | return -ENOMEM; | |
3148 | ||
3149 | return 0; | |
3150 | } | |
3151 | ||
3152 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3153 | const char *v) | |
3154 | { | |
3155 | int ret; | |
96532523 SH |
3156 | |
3157 | if (!c->lxc_conf) | |
3158 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3159 | |
6b0d5538 | 3160 | if (!c->lxc_conf) |
96532523 | 3161 | return false; |
4222a9f4 | 3162 | |
0d9cd9c3 CB |
3163 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3164 | if (ret < 0) | |
f979ac15 | 3165 | return false; |
4222a9f4 | 3166 | |
0d9cd9c3 | 3167 | return true; |
96532523 SH |
3168 | } |
3169 | ||
858377e4 | 3170 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3171 | { |
72d0e1cb | 3172 | bool b = false; |
72d0e1cb SG |
3173 | |
3174 | if (!c) | |
3175 | return false; | |
3176 | ||
5cee8c50 | 3177 | if (container_mem_lock(c)) |
72d0e1cb SG |
3178 | return false; |
3179 | ||
0d9cd9c3 | 3180 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3181 | |
5cee8c50 | 3182 | container_mem_unlock(c); |
72d0e1cb SG |
3183 | return b; |
3184 | } | |
3185 | ||
858377e4 SH |
3186 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3187 | ||
72d0e1cb SG |
3188 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3189 | { | |
3190 | if (!c || !c->configfile) | |
3191 | return NULL; | |
a73846d8 | 3192 | |
72d0e1cb SG |
3193 | return strdup(c->configfile); |
3194 | } | |
3195 | ||
2a59a681 SH |
3196 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3197 | { | |
3198 | if (!c || !c->config_path) | |
3199 | return NULL; | |
a73846d8 | 3200 | |
2a59a681 SH |
3201 | return (const char *)(c->config_path); |
3202 | } | |
3203 | ||
afeecbba SH |
3204 | /* |
3205 | * not for export | |
3206 | * Just recalculate the c->configfile based on the | |
3207 | * c->config_path, which must be set. | |
3208 | * The lxc_container must be locked or not yet public. | |
3209 | */ | |
3210 | static bool set_config_filename(struct lxc_container *c) | |
3211 | { | |
3212 | char *newpath; | |
3213 | int len, ret; | |
3214 | ||
3215 | if (!c->config_path) | |
3216 | return false; | |
3217 | ||
3218 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3219 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3220 | newpath = malloc(len); | |
3221 | if (!newpath) | |
3222 | return false; | |
3223 | ||
3224 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3225 | if (ret < 0 || ret >= len) { | |
3226 | fprintf(stderr, "Error printing out config file name\n"); | |
3227 | free(newpath); | |
3228 | return false; | |
3229 | } | |
3230 | ||
f10fad2f | 3231 | free(c->configfile); |
afeecbba SH |
3232 | c->configfile = newpath; |
3233 | ||
3234 | return true; | |
3235 | } | |
3236 | ||
858377e4 | 3237 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3238 | { |
3239 | char *p; | |
3240 | bool b = false; | |
afeecbba | 3241 | char *oldpath = NULL; |
2a59a681 SH |
3242 | |
3243 | if (!c) | |
3244 | return b; | |
3245 | ||
5cee8c50 | 3246 | if (container_mem_lock(c)) |
2a59a681 SH |
3247 | return b; |
3248 | ||
3249 | p = strdup(path); | |
afeecbba SH |
3250 | if (!p) { |
3251 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3252 | goto err; |
afeecbba SH |
3253 | } |
3254 | ||
2a59a681 SH |
3255 | b = true; |
3256 | if (c->config_path) | |
afeecbba | 3257 | oldpath = c->config_path; |
2a59a681 | 3258 | c->config_path = p; |
afeecbba SH |
3259 | |
3260 | /* Since we've changed the config path, we have to change the | |
3261 | * config file name too */ | |
3262 | if (!set_config_filename(c)) { | |
3263 | ERROR("Out of memory setting new config filename"); | |
3264 | b = false; | |
3265 | free(c->config_path); | |
3266 | c->config_path = oldpath; | |
3267 | oldpath = NULL; | |
3268 | } | |
a73846d8 | 3269 | |
2a59a681 | 3270 | err: |
f10fad2f | 3271 | free(oldpath); |
5cee8c50 | 3272 | container_mem_unlock(c); |
2a59a681 SH |
3273 | return b; |
3274 | } | |
3275 | ||
858377e4 | 3276 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3277 | |
858377e4 | 3278 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3279 | { |
3280 | int ret; | |
2202afc9 | 3281 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3282 | |
3283 | if (!c) | |
3284 | return false; | |
3285 | ||
3bc449ed | 3286 | if (is_stopped(c)) |
794dd120 SH |
3287 | return false; |
3288 | ||
5a087e05 | 3289 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3290 | if (!cgroup_ops) |
3291 | return false; | |
3292 | ||
2202afc9 | 3293 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed | 3294 | |
2202afc9 CB |
3295 | cgroup_exit(cgroup_ops); |
3296 | ||
3bc449ed | 3297 | return ret == 0; |
794dd120 SH |
3298 | } |
3299 | ||
858377e4 SH |
3300 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3301 | ||
3302 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3303 | { |
3bc449ed | 3304 | int ret; |
2202afc9 | 3305 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3306 | |
6502006a | 3307 | if (!c) |
794dd120 SH |
3308 | return -1; |
3309 | ||
3bc449ed | 3310 | if (is_stopped(c)) |
794dd120 SH |
3311 | return -1; |
3312 | ||
5a087e05 | 3313 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3314 | if (!cgroup_ops) |
3315 | return -1; | |
3316 | ||
2202afc9 CB |
3317 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3318 | c->config_path); | |
2202afc9 CB |
3319 | |
3320 | cgroup_exit(cgroup_ops); | |
3321 | ||
794dd120 SH |
3322 | return ret; |
3323 | } | |
3324 | ||
858377e4 SH |
3325 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3326 | ||
593e8478 | 3327 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3328 | { |
593e8478 | 3329 | return lxc_global_config_value(key); |
a8428dfa SH |
3330 | } |
3331 | ||
b6b918a1 SG |
3332 | const char *lxc_get_version(void) |
3333 | { | |
95ee490b | 3334 | return LXC_VERSION; |
b6b918a1 SG |
3335 | } |
3336 | ||
f0ca2726 | 3337 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3338 | { |
3339 | int in, out; | |
3340 | ssize_t len, ret; | |
3341 | char buf[8096]; | |
3342 | struct stat sbuf; | |
3343 | ||
3344 | if (file_exists(new)) { | |
3345 | ERROR("copy destination %s exists", new); | |
3346 | return -1; | |
3347 | } | |
a73846d8 | 3348 | |
9be53773 SH |
3349 | ret = stat(old, &sbuf); |
3350 | if (ret < 0) { | |
dfb31b25 | 3351 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3352 | return -1; |
3353 | } | |
3354 | ||
3355 | in = open(old, O_RDONLY); | |
3356 | if (in < 0) { | |
dfb31b25 | 3357 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3358 | return -1; |
3359 | } | |
a73846d8 | 3360 | |
9be53773 SH |
3361 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3362 | if (out < 0) { | |
dfb31b25 | 3363 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3364 | close(in); |
3365 | return -1; | |
3366 | } | |
3367 | ||
51a8a74c | 3368 | for (;;) { |
3e1e9db8 | 3369 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3370 | if (len < 0) { |
dfb31b25 | 3371 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3372 | goto err; |
3373 | } | |
a73846d8 | 3374 | |
9be53773 SH |
3375 | if (len == 0) |
3376 | break; | |
a73846d8 | 3377 | |
2a2a676d | 3378 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3379 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3380 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3381 | goto err; |
3382 | } | |
3383 | } | |
a73846d8 | 3384 | |
9be53773 SH |
3385 | close(in); |
3386 | close(out); | |
3387 | ||
1a0e70ac | 3388 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3389 | ret = chmod(new, sbuf.st_mode); |
3390 | if (ret) { | |
dfb31b25 | 3391 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3392 | return -1; |
3393 | } | |
3394 | ||
3395 | return 0; | |
3396 | ||
3397 | err: | |
3398 | close(in); | |
3399 | close(out); | |
3400 | return -1; | |
3401 | } | |
3402 | ||
9be53773 SH |
3403 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3404 | { | |
7a99b5a0 | 3405 | __do_free char *cpath = NULL; |
619256b5 | 3406 | int i, len, ret; |
9be53773 | 3407 | struct lxc_list *it; |
619256b5 ÇO |
3408 | |
3409 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
f5849fd7 | 3410 | cpath = must_realloc(NULL, len); |
619256b5 ÇO |
3411 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); |
3412 | if (ret < 0 || ret >= len) | |
3413 | return -1; | |
9be53773 SH |
3414 | |
3415 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3416 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3417 | char *hookname = it->elem; | |
c32981c3 | 3418 | char *fname = strrchr(hookname, '/'); |
8a22c168 | 3419 | char tmppath[PATH_MAX]; |
1a0e70ac | 3420 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3421 | return 0; |
a73846d8 | 3422 | |
619256b5 | 3423 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3424 | /* this hook is public - ignore */ |
619256b5 ÇO |
3425 | continue; |
3426 | } | |
a73846d8 | 3427 | |
1a0e70ac | 3428 | /* copy the script, and change the entry in confile */ |
8a22c168 | 3429 | ret = snprintf(tmppath, PATH_MAX, "%s/%s/%s", |
9be53773 | 3430 | c->config_path, c->name, fname+1); |
8a22c168 | 3431 | if (ret < 0 || ret >= PATH_MAX) |
9be53773 | 3432 | return -1; |
a73846d8 | 3433 | |
9be53773 SH |
3434 | ret = copy_file(it->elem, tmppath); |
3435 | if (ret < 0) | |
3436 | return -1; | |
a73846d8 | 3437 | |
9be53773 | 3438 | free(it->elem); |
a73846d8 | 3439 | |
9be53773 SH |
3440 | it->elem = strdup(tmppath); |
3441 | if (!it->elem) { | |
3442 | ERROR("out of memory copying hook path"); | |
3443 | return -1; | |
3444 | } | |
9be53773 SH |
3445 | } |
3446 | } | |
3447 | ||
67702c21 SH |
3448 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3449 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3450 | ERROR("Error saving new hooks in clone"); |
3451 | return -1; | |
3452 | } | |
a73846d8 | 3453 | |
858377e4 | 3454 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3455 | return 0; |
3456 | } | |
3457 | ||
9be53773 SH |
3458 | |
3459 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3460 | { | |
8a22c168 | 3461 | char newpath[PATH_MAX]; |
9be53773 SH |
3462 | char *oldpath = oldc->lxc_conf->fstab; |
3463 | int ret; | |
3464 | ||
3465 | if (!oldpath) | |
3466 | return 0; | |
3467 | ||
47148e96 CB |
3468 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3469 | ||
c32981c3 | 3470 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3471 | if (!p) |
3472 | return -1; | |
a73846d8 | 3473 | |
8a22c168 | 3474 | ret = snprintf(newpath, PATH_MAX, "%s/%s%s", |
9be53773 | 3475 | c->config_path, c->name, p); |
8a22c168 | 3476 | if (ret < 0 || ret >= PATH_MAX) { |
9be53773 SH |
3477 | ERROR("error printing new path for %s", oldpath); |
3478 | return -1; | |
3479 | } | |
a73846d8 | 3480 | |
9be53773 SH |
3481 | if (file_exists(newpath)) { |
3482 | ERROR("error: fstab file %s exists", newpath); | |
3483 | return -1; | |
3484 | } | |
3485 | ||
3486 | if (copy_file(oldpath, newpath) < 0) { | |
3487 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3488 | return -1; | |
3489 | } | |
a73846d8 | 3490 | |
9be53773 | 3491 | free(c->lxc_conf->fstab); |
a73846d8 | 3492 | |
9be53773 SH |
3493 | c->lxc_conf->fstab = strdup(newpath); |
3494 | if (!c->lxc_conf->fstab) { | |
3495 | ERROR("error: allocating pathname"); | |
3496 | return -1; | |
3497 | } | |
a73846d8 | 3498 | |
47148e96 | 3499 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3500 | ERROR("error saving new lxctab"); |
3501 | return -1; | |
3502 | } | |
9be53773 SH |
3503 | |
3504 | return 0; | |
3505 | } | |
3506 | ||
dfb31b25 SH |
3507 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3508 | { | |
8a22c168 | 3509 | char path0[PATH_MAX], path1[PATH_MAX]; |
dfb31b25 SH |
3510 | int ret; |
3511 | ||
8a22c168 | 3512 | ret = snprintf(path0, PATH_MAX, "%s/%s/lxc_rdepends", c0->config_path, |
dfb31b25 | 3513 | c0->name); |
8a22c168 | 3514 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3515 | WARN("Error copying reverse dependencies"); |
3516 | return; | |
3517 | } | |
a73846d8 | 3518 | |
8a22c168 | 3519 | ret = snprintf(path1, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3520 | c->name); |
8a22c168 | 3521 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3522 | WARN("Error copying reverse dependencies"); |
3523 | return; | |
3524 | } | |
a73846d8 | 3525 | |
dfb31b25 SH |
3526 | if (copy_file(path0, path1) < 0) { |
3527 | INFO("Error copying reverse dependencies"); | |
3528 | return; | |
3529 | } | |
3530 | } | |
3531 | ||
3532 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3533 | { | |
3534 | int ret; | |
8a22c168 | 3535 | char path[PATH_MAX]; |
dfb31b25 SH |
3536 | FILE *f; |
3537 | bool bret; | |
3538 | ||
8a22c168 | 3539 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3540 | c->name); |
8a22c168 | 3541 | if (ret < 0 || ret >= PATH_MAX) |
dfb31b25 | 3542 | return false; |
a73846d8 | 3543 | |
dfb31b25 SH |
3544 | f = fopen(path, "a"); |
3545 | if (!f) | |
3546 | return false; | |
a73846d8 | 3547 | |
dfb31b25 | 3548 | bret = true; |
a73846d8 | 3549 | |
1a0e70ac | 3550 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3551 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3552 | bret = false; | |
a73846d8 | 3553 | |
dfb31b25 SH |
3554 | if (fclose(f) != 0) |
3555 | bret = false; | |
a73846d8 | 3556 | |
dfb31b25 SH |
3557 | return bret; |
3558 | } | |
3559 | ||
15a90a10 SH |
3560 | /* |
3561 | * If the fs natively supports snapshot clones with no penalty, | |
3562 | * then default to those even if not requested. | |
3563 | * Currently we only do this for btrfs. | |
3564 | */ | |
3565 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3566 | struct lxc_container *c1) | |
3567 | { | |
7a99b5a0 | 3568 | __do_free char *p0 = NULL, *p1 = NULL; |
2afdc31f | 3569 | int ret; |
15a90a10 SH |
3570 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3571 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
6e0fa6a0 | 3572 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3573 | |
f5849fd7 CB |
3574 | p0 = must_realloc(NULL, l0 + 1); |
3575 | p1 = must_realloc(NULL, l1 + 1); | |
2afdc31f CB |
3576 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3577 | if (ret < 0 || ret >= l0) | |
3578 | return false; | |
3579 | ||
3580 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3581 | if (ret < 0 || ret >= l1) | |
3582 | return false; | |
9a09badc CB |
3583 | |
3584 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3585 | return false; | |
3586 | ||
6e0fa6a0 CB |
3587 | if (is_btrfs_subvol(rootfs) <= 0) |
3588 | return false; | |
3589 | ||
15a90a10 SH |
3590 | return btrfs_same_fs(p0, p1) == 0; |
3591 | } | |
3592 | ||
9be53773 | 3593 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3594 | const char *newtype, int flags, const char *bdevdata, |
3595 | uint64_t newsize) | |
9be53773 | 3596 | { |
10bc1861 | 3597 | struct lxc_storage *bdev; |
07db51a2 | 3598 | bool need_rdep; |
9be53773 | 3599 | |
15a90a10 SH |
3600 | if (should_default_to_snapshot(c0, c)) |
3601 | flags |= LXC_CLONE_SNAPSHOT; | |
3602 | ||
10bc1861 CB |
3603 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3604 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3605 | if (!bdev) { |
763429b6 | 3606 | ERROR("Error copying storage."); |
9be53773 SH |
3607 | return -1; |
3608 | } | |
763429b6 CB |
3609 | |
3610 | /* Set new rootfs. */ | |
9be53773 SH |
3611 | free(c->lxc_conf->rootfs.path); |
3612 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3613 | storage_put(bdev); |
763429b6 | 3614 | |
dfb31b25 | 3615 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3616 | ERROR("Out of memory while setting storage path."); |
3617 | return -1; | |
3618 | } | |
763429b6 | 3619 | |
7a96a068 CB |
3620 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3621 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3622 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3623 | c->lxc_conf->rootfs.path)) { |
3624 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3625 | return -1; |
3626 | } | |
763429b6 | 3627 | |
eee59f94 SH |
3628 | if (flags & LXC_CLONE_SNAPSHOT) |
3629 | copy_rdepends(c, c0); | |
a73846d8 | 3630 | |
dfb31b25 SH |
3631 | if (need_rdep) { |
3632 | if (!add_rdepends(c, c0)) | |
3633 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3634 | c->name, c0->name); |
dfb31b25 SH |
3635 | } |
3636 | ||
3637 | mod_all_rdeps(c, true); | |
3638 | ||
9be53773 SH |
3639 | return 0; |
3640 | } | |
3641 | ||
1354955b SH |
3642 | struct clone_update_data { |
3643 | struct lxc_container *c0; | |
3644 | struct lxc_container *c1; | |
3645 | int flags; | |
3646 | char **hookargs; | |
3647 | }; | |
3648 | ||
3649 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3650 | { |
1354955b SH |
3651 | struct lxc_container *c0 = data->c0; |
3652 | struct lxc_container *c = data->c1; | |
3653 | int flags = data->flags; | |
3654 | char **hookargs = data->hookargs; | |
9be53773 | 3655 | int ret = -1; |
8a22c168 | 3656 | char path[PATH_MAX]; |
10bc1861 | 3657 | struct lxc_storage *bdev; |
9be53773 | 3658 | FILE *fout; |
148e91f5 | 3659 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3660 | |
3661 | /* update hostname in rootfs */ | |
3662 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3663 | ||
1354955b SH |
3664 | if (setgid(0) < 0) { |
3665 | ERROR("Failed to setgid to 0"); | |
3666 | return -1; | |
3667 | } | |
a73846d8 | 3668 | |
1354955b SH |
3669 | if (setuid(0) < 0) { |
3670 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3671 | return -1; |
1354955b | 3672 | } |
a73846d8 | 3673 | |
c476bdce SH |
3674 | if (setgroups(0, NULL) < 0) |
3675 | WARN("Failed to clear groups"); | |
9be53773 | 3676 | |
1354955b SH |
3677 | if (unshare(CLONE_NEWNS) < 0) |
3678 | return -1; | |
a73846d8 | 3679 | |
8a388ed4 | 3680 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3681 | if (!bdev) |
1354955b | 3682 | return -1; |
a73846d8 | 3683 | |
cf3ef16d SH |
3684 | if (strcmp(bdev->type, "dir") != 0) { |
3685 | if (unshare(CLONE_NEWNS) < 0) { | |
3686 | ERROR("error unsharing mounts"); | |
10bc1861 | 3687 | storage_put(bdev); |
1354955b | 3688 | return -1; |
cf3ef16d | 3689 | } |
a73846d8 | 3690 | |
2c6f3fc9 SH |
3691 | if (detect_shared_rootfs()) { |
3692 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3693 | SYSERROR("Failed to make / rslave"); | |
3694 | ERROR("Continuing..."); | |
3695 | } | |
3696 | } | |
a73846d8 | 3697 | |
e7de366c | 3698 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3699 | storage_put(bdev); |
1354955b | 3700 | return -1; |
e7de366c | 3701 | } |
1a0e70ac | 3702 | } else { /* TODO come up with a better way */ |
f10fad2f | 3703 | free(bdev->dest); |
3d7e738a | 3704 | bdev->dest = strdup(lxc_storage_get_path(bdev->src, bdev->type)); |
cf3ef16d | 3705 | } |
148e91f5 SH |
3706 | |
3707 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3708 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3709 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3710 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3711 | |
3712 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3713 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3714 | |
3715 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3716 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3717 | |
3718 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3719 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3720 | |
3721 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3722 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3723 | |
14a7b0f9 | 3724 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3725 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3726 | storage_put(bdev); |
1354955b | 3727 | return -1; |
148e91f5 SH |
3728 | } |
3729 | } | |
3730 | ||
3731 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
8a22c168 | 3732 | ret = snprintf(path, PATH_MAX, "%s/etc/hostname", bdev->dest); |
10bc1861 | 3733 | storage_put(bdev); |
e7de366c | 3734 | |
8a22c168 | 3735 | if (ret < 0 || ret >= PATH_MAX) |
1354955b | 3736 | return -1; |
a73846d8 | 3737 | |
8058be39 | 3738 | if (!file_exists(path)) |
1354955b | 3739 | return 0; |
a73846d8 | 3740 | |
148e91f5 | 3741 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3742 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3743 | return 0; |
148e91f5 | 3744 | } |
a73846d8 | 3745 | |
a684f0b7 ÇO |
3746 | if (fprintf(fout, "%s", c->name) < 0) { |
3747 | fclose(fout); | |
1354955b | 3748 | return -1; |
6849cb5b | 3749 | } |
a73846d8 | 3750 | |
148e91f5 | 3751 | if (fclose(fout) < 0) |
1354955b | 3752 | return -1; |
10bc1861 CB |
3753 | } else { |
3754 | storage_put(bdev); | |
9be53773 | 3755 | } |
e7de366c | 3756 | |
1354955b SH |
3757 | return 0; |
3758 | } | |
3759 | ||
3760 | static int clone_update_rootfs_wrapper(void *data) | |
3761 | { | |
3762 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3763 | return clone_update_rootfs(arg); | |
9be53773 SH |
3764 | } |
3765 | ||
3766 | /* | |
3767 | * We want to support: | |
3768 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3769 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3770 | ||
ba115175 CB |
3771 | -s [ implies overlay] |
3772 | -s -B overlay | |
9be53773 SH |
3773 | |
3774 | only rootfs gets converted (copied/snapshotted) on clone. | |
3775 | */ | |
3776 | ||
d5752559 | 3777 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3778 | { |
c32981c3 | 3779 | char *p = strrchr(path, '/'); |
d5752559 | 3780 | int ret = -1; |
9be53773 SH |
3781 | |
3782 | if (!p) | |
3783 | return -1; | |
a73846d8 | 3784 | |
9be53773 | 3785 | *p = '\0'; |
d028235d | 3786 | ret = do_create_container_dir(path, conf); |
9be53773 | 3787 | *p = '/'; |
a73846d8 | 3788 | |
9be53773 SH |
3789 | return ret; |
3790 | } | |
3791 | ||
858377e4 | 3792 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3793 | const char *lxcpath, int flags, |
d659597e | 3794 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3795 | char **hookargs) |
9be53773 | 3796 | { |
8a22c168 | 3797 | char newpath[PATH_MAX]; |
0e1a60b0 | 3798 | int fd, ret; |
1354955b | 3799 | struct clone_update_data data; |
3b392519 | 3800 | size_t saved_unexp_len; |
1354955b | 3801 | pid_t pid; |
17a367d8 CB |
3802 | int storage_copied = 0; |
3803 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3804 | struct lxc_container *c2 = NULL; | |
9be53773 | 3805 | |
858377e4 | 3806 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3807 | return NULL; |
3808 | ||
5cee8c50 | 3809 | if (container_mem_lock(c)) |
9be53773 | 3810 | return NULL; |
754076f5 BH |
3811 | if (!is_stopped(c) && !(flags & LXC_CLONE_ALLOW_RUNNING)) { |
3812 | ERROR("error: Original container (%s) is running. Use --allowrunning if you want to force a snapshot of the running container.", c->name); | |
9be53773 SH |
3813 | goto out; |
3814 | } | |
3815 | ||
1a0e70ac | 3816 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3817 | if (!newname) |
3818 | newname = c->name; | |
a73846d8 | 3819 | |
05d53f4c | 3820 | if (!lxcpath) |
858377e4 | 3821 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3822 | |
8a22c168 CB |
3823 | ret = snprintf(newpath, PATH_MAX, "%s/%s/config", lxcpath, newname); |
3824 | if (ret < 0 || ret >= PATH_MAX) { | |
9be53773 SH |
3825 | SYSERROR("clone: failed making config pathname"); |
3826 | goto out; | |
3827 | } | |
17a367d8 | 3828 | |
9be53773 SH |
3829 | if (file_exists(newpath)) { |
3830 | ERROR("error: clone: %s exists", newpath); | |
3831 | goto out; | |
3832 | } | |
3833 | ||
d5752559 | 3834 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3835 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3836 | ERROR("Error creating container dir for %s", newpath); |
3837 | goto out; | |
3838 | } | |
3839 | ||
1a0e70ac | 3840 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3841 | if (c->lxc_conf->rootfs.path) { |
3842 | origroot = c->lxc_conf->rootfs.path; | |
3843 | c->lxc_conf->rootfs.path = NULL; | |
3844 | } | |
0e1a60b0 CB |
3845 | |
3846 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3847 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3848 | if (fd < 0) { |
3849 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3850 | goto out; |
3851 | } | |
5eea90e8 SH |
3852 | |
3853 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3854 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3855 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3856 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3857 | close(fd); |
5eea90e8 SH |
3858 | goto out; |
3859 | } | |
7a96a068 | 3860 | |
7a96a068 | 3861 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3862 | write_config(fd, c->lxc_conf); |
3863 | close(fd); | |
a73846d8 | 3864 | |
8d2efe40 | 3865 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3866 | |
5eea90e8 SH |
3867 | free(c->lxc_conf->unexpanded_config); |
3868 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3869 | saved_unexp_conf = NULL; | |
3b392519 | 3870 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3871 | |
8a22c168 CB |
3872 | ret = snprintf(newpath, PATH_MAX, "%s/%s/rootfs", lxcpath, newname); |
3873 | if (ret < 0 || ret >= PATH_MAX) { | |
90b366fc CB |
3874 | SYSERROR("clone: failed making rootfs pathname"); |
3875 | goto out; | |
3876 | } | |
17a367d8 CB |
3877 | |
3878 | ret = mkdir(newpath, 0755); | |
3879 | if (ret < 0) { | |
3880 | /* For an overlay container the rootfs is considered immutable | |
3881 | * and will not have been removed when restoring from a | |
3882 | * snapshot. | |
3883 | */ | |
3884 | if (errno != ENOENT && | |
3885 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3886 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3887 | goto out; | |
3888 | } | |
9be53773 SH |
3889 | } |
3890 | ||
e0010464 | 3891 | if (am_guest_unpriv()) { |
1354955b | 3892 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3893 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3894 | goto out; |
3895 | } | |
3896 | } | |
3897 | ||
05d53f4c | 3898 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3899 | if (!c2) { |
05d53f4c SH |
3900 | ERROR("clone: failed to create new container (%s %s)", newname, |
3901 | lxcpath); | |
9be53773 SH |
3902 | goto out; |
3903 | } | |
8d2efe40 | 3904 | |
1a0e70ac | 3905 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3906 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3907 | if (ret < 0) | |
3908 | goto out; | |
9be53773 | 3909 | |
1a0e70ac | 3910 | /* update utsname */ |
3d7ad474 CB |
3911 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3912 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3913 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3914 | |
0d9cd9c3 | 3915 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3916 | ERROR("Error setting new hostname"); |
3917 | goto out; | |
3918 | } | |
96532523 SH |
3919 | } |
3920 | ||
1a0e70ac | 3921 | /* copy hooks */ |
619256b5 ÇO |
3922 | ret = copyhooks(c, c2); |
3923 | if (ret < 0) { | |
3924 | ERROR("error copying hooks"); | |
3925 | goto out; | |
9be53773 SH |
3926 | } |
3927 | ||
3928 | if (copy_fstab(c, c2) < 0) { | |
3929 | ERROR("error copying fstab"); | |
9be53773 SH |
3930 | goto out; |
3931 | } | |
3932 | ||
1a0e70ac | 3933 | /* update macaddrs */ |
6b0d5538 | 3934 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3935 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3936 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3937 | goto out; |
3938 | } | |
3939 | } | |
9be53773 | 3940 | |
1a0e70ac | 3941 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3942 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3943 | goto out; |
3944 | ||
1a0e70ac CB |
3945 | /* We've now successfully created c2's storage, so clear it out if we |
3946 | * fail after this. | |
3947 | */ | |
176d9acb SH |
3948 | storage_copied = 1; |
3949 | ||
375c2258 | 3950 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3951 | goto out; |
9be53773 | 3952 | |
1354955b SH |
3953 | if ((pid = fork()) < 0) { |
3954 | SYSERROR("fork"); | |
9be53773 | 3955 | goto out; |
1354955b | 3956 | } |
a73846d8 | 3957 | |
1354955b SH |
3958 | if (pid > 0) { |
3959 | ret = wait_for_pid(pid); | |
3960 | if (ret) | |
3961 | goto out; | |
a73846d8 | 3962 | |
1354955b SH |
3963 | container_mem_unlock(c); |
3964 | return c2; | |
3965 | } | |
a73846d8 | 3966 | |
1354955b SH |
3967 | data.c0 = c; |
3968 | data.c1 = c2; | |
3969 | data.flags = flags; | |
3970 | data.hookargs = hookargs; | |
a73846d8 | 3971 | |
e0010464 | 3972 | if (am_guest_unpriv()) |
ee484f7f CB |
3973 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3974 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3975 | else |
3976 | ret = clone_update_rootfs(&data); | |
3977 | if (ret < 0) | |
d8480a31 | 3978 | _exit(EXIT_FAILURE); |
9be53773 | 3979 | |
5cee8c50 | 3980 | container_mem_unlock(c); |
d8480a31 | 3981 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3982 | |
3983 | out: | |
5cee8c50 | 3984 | container_mem_unlock(c); |
375c2258 | 3985 | if (c2) { |
176d9acb SH |
3986 | if (!storage_copied) |
3987 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 3988 | |
375c2258 | 3989 | c2->destroy(c2); |
9be53773 | 3990 | lxc_container_put(c2); |
375c2258 | 3991 | } |
9be53773 SH |
3992 | |
3993 | return NULL; | |
3994 | } | |
3995 | ||
858377e4 SH |
3996 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3997 | const char *lxcpath, int flags, | |
3998 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3999 | char **hookargs) | |
4000 | { | |
4001 | struct lxc_container * ret; | |
a73846d8 | 4002 | |
858377e4 SH |
4003 | current_config = c ? c->lxc_conf : NULL; |
4004 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
4005 | current_config = NULL; | |
a73846d8 | 4006 | |
858377e4 SH |
4007 | return ret; |
4008 | } | |
4009 | ||
4010 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 4011 | { |
10bc1861 | 4012 | struct lxc_storage *bdev; |
06e5650e | 4013 | struct lxc_container *newc; |
06e5650e | 4014 | |
d693cf93 | 4015 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
4016 | return false; |
4017 | ||
18aa217b SH |
4018 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4019 | ERROR("Renaming a container with snapshots is not supported"); | |
4020 | return false; | |
4021 | } | |
a73846d8 | 4022 | |
8a388ed4 | 4023 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4024 | if (!bdev) { |
4025 | ERROR("Failed to find original backing store type"); | |
4026 | return false; | |
4027 | } | |
4028 | ||
619256b5 | 4029 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4030 | storage_put(bdev); |
06e5650e ÇO |
4031 | if (!newc) { |
4032 | lxc_container_put(newc); | |
4033 | return false; | |
4034 | } | |
4035 | ||
4036 | if (newc && lxcapi_is_defined(newc)) | |
4037 | lxc_container_put(newc); | |
4038 | ||
17a367d8 | 4039 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4040 | ERROR("Could not destroy existing container %s", c->name); |
4041 | return false; | |
4042 | } | |
a73846d8 | 4043 | |
06e5650e ÇO |
4044 | return true; |
4045 | } | |
4046 | ||
858377e4 SH |
4047 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4048 | ||
a0e93eeb CS |
4049 | 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) |
4050 | { | |
858377e4 SH |
4051 | int ret; |
4052 | ||
a0e93eeb CS |
4053 | if (!c) |
4054 | return -1; | |
4055 | ||
858377e4 SH |
4056 | current_config = c->lxc_conf; |
4057 | ||
4058 | ret = lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
4059 | current_config = NULL; | |
4060 | return ret; | |
a0e93eeb CS |
4061 | } |
4062 | ||
858377e4 | 4063 | 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 |
4064 | { |
4065 | lxc_attach_command_t command; | |
4066 | pid_t pid; | |
4067 | int r; | |
4068 | ||
4069 | if (!c) | |
4070 | return -1; | |
4071 | ||
4072 | command.program = (char*)program; | |
4073 | command.argv = (char**)argv; | |
a73846d8 | 4074 | |
a0e93eeb CS |
4075 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); |
4076 | if (r < 0) { | |
4077 | ERROR("ups"); | |
4078 | return r; | |
4079 | } | |
a73846d8 | 4080 | |
a0e93eeb CS |
4081 | return lxc_wait_for_pid_status(pid); |
4082 | } | |
4083 | ||
858377e4 SH |
4084 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
4085 | { | |
4086 | int ret; | |
a73846d8 | 4087 | |
858377e4 SH |
4088 | current_config = c ? c->lxc_conf : NULL; |
4089 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4090 | current_config = NULL; | |
a73846d8 | 4091 | |
858377e4 SH |
4092 | return ret; |
4093 | } | |
4094 | ||
74a3920a | 4095 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 | 4096 | { |
7a99b5a0 | 4097 | __do_free char *fname = NULL; |
f5dd1d53 SH |
4098 | struct stat sb; |
4099 | int i = 0, ret; | |
4100 | ||
f5849fd7 | 4101 | fname = must_realloc(NULL, strlen(lxcpath) + 20); |
a73846d8 | 4102 | |
51a8a74c | 4103 | for (;;) { |
f5dd1d53 | 4104 | sprintf(fname, "%s/snap%d", lxcpath, i); |
a73846d8 | 4105 | |
f5dd1d53 SH |
4106 | ret = stat(fname, &sb); |
4107 | if (ret != 0) | |
4108 | return i; | |
a73846d8 | 4109 | |
f5dd1d53 SH |
4110 | i++; |
4111 | } | |
4112 | } | |
4113 | ||
18aa217b SH |
4114 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4115 | { | |
4116 | int ret; | |
a73846d8 | 4117 | |
18aa217b SH |
4118 | /* |
4119 | * If the old style snapshot path exists, use it | |
4120 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4121 | */ | |
8a22c168 CB |
4122 | ret = snprintf(snappath, PATH_MAX, "%ssnaps", c->config_path); |
4123 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4124 | return false; |
a73846d8 | 4125 | |
18aa217b | 4126 | if (dir_exists(snappath)) { |
8a22c168 CB |
4127 | ret = snprintf(snappath, PATH_MAX, "%ssnaps/%s", c->config_path, c->name); |
4128 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4129 | return false; |
a73846d8 | 4130 | |
18aa217b SH |
4131 | return true; |
4132 | } | |
4133 | ||
4134 | /* | |
4135 | * Use the new style path | |
4136 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4137 | */ | |
8a22c168 CB |
4138 | ret = snprintf(snappath, PATH_MAX, "%s/%s/snaps", c->config_path, c->name); |
4139 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4140 | return false; |
a73846d8 | 4141 | |
18aa217b SH |
4142 | return true; |
4143 | } | |
4144 | ||
858377e4 | 4145 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 | 4146 | { |
f5849fd7 | 4147 | __do_free char *dfnam = NULL; |
f5dd1d53 | 4148 | int i, flags, ret; |
df05fa0f | 4149 | time_t timer; |
4150 | struct tm tm_info; | |
f5dd1d53 | 4151 | struct lxc_container *c2; |
8a22c168 | 4152 | char snappath[PATH_MAX], newname[20]; |
df05fa0f | 4153 | char buffer[25]; |
4154 | FILE *f; | |
f5dd1d53 | 4155 | |
840f05df SH |
4156 | if (!c || !lxcapi_is_defined(c)) |
4157 | return -1; | |
4158 | ||
10bc1861 | 4159 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4160 | ERROR("%s's backing store cannot be backed up", c->name); |
4161 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4162 | return -1; |
4163 | } | |
4164 | ||
18aa217b | 4165 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4166 | return -1; |
18aa217b | 4167 | |
f5dd1d53 SH |
4168 | i = get_next_index(snappath, c->name); |
4169 | ||
4170 | if (mkdir_p(snappath, 0755) < 0) { | |
4171 | ERROR("Failed to create snapshot directory %s", snappath); | |
4172 | return -1; | |
4173 | } | |
4174 | ||
4175 | ret = snprintf(newname, 20, "snap%d", i); | |
4176 | if (ret < 0 || ret >= 20) | |
4177 | return -1; | |
4178 | ||
0a83cbbb SH |
4179 | /* |
4180 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4181 | * created in the original container | |
4182 | */ | |
4183 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4184 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4185 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4186 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4187 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4188 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4189 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4190 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4191 | } | |
a73846d8 | 4192 | |
858377e4 | 4193 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4194 | if (!c2) { |
df05fa0f | 4195 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4196 | return -1; |
4197 | } | |
4198 | ||
4199 | lxc_container_put(c2); | |
4200 | ||
1a0e70ac | 4201 | /* Now write down the creation time. */ |
f5dd1d53 | 4202 | time(&timer); |
f5dd1d53 | 4203 | |
df05fa0f | 4204 | if (!localtime_r(&timer, &tm_info)) { |
4205 | ERROR("Failed to get localtime"); | |
4206 | return -1; | |
4207 | } | |
4208 | ||
4209 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 | 4210 | |
f5849fd7 | 4211 | dfnam = must_realloc(NULL, strlen(snappath) + strlen(newname) + 5); |
f5dd1d53 | 4212 | sprintf(dfnam, "%s/%s/ts", snappath, newname); |
025ed0f3 | 4213 | f = fopen(dfnam, "w"); |
f5dd1d53 | 4214 | if (!f) { |
959aee9c | 4215 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4216 | return -1; |
4217 | } | |
a73846d8 | 4218 | |
f5dd1d53 SH |
4219 | if (fprintf(f, "%s", buffer) < 0) { |
4220 | SYSERROR("Writing timestamp"); | |
4221 | fclose(f); | |
4222 | return -1; | |
4223 | } | |
a73846d8 | 4224 | |
025ed0f3 | 4225 | ret = fclose(f); |
025ed0f3 | 4226 | if (ret != 0) { |
f5dd1d53 SH |
4227 | SYSERROR("Writing timestamp"); |
4228 | return -1; | |
4229 | } | |
4230 | ||
4231 | if (commentfile) { | |
7a99b5a0 | 4232 | __do_free char *path = NULL; |
1a0e70ac | 4233 | /* $p / $name / comment \0 */ |
f5dd1d53 | 4234 | int len = strlen(snappath) + strlen(newname) + 10; |
a73846d8 | 4235 | |
f5849fd7 | 4236 | path = must_realloc(NULL, len); |
f5dd1d53 SH |
4237 | sprintf(path, "%s/%s/comment", snappath, newname); |
4238 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4239 | } | |
4240 | ||
4241 | return i; | |
4242 | } | |
4243 | ||
858377e4 SH |
4244 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4245 | ||
f5dd1d53 SH |
4246 | static void lxcsnap_free(struct lxc_snapshot *s) |
4247 | { | |
f10fad2f ME |
4248 | free(s->name); |
4249 | free(s->comment_pathname); | |
4250 | free(s->timestamp); | |
4251 | free(s->lxcpath); | |
f5dd1d53 SH |
4252 | } |
4253 | ||
4254 | static char *get_snapcomment_path(char* snappath, char *name) | |
4255 | { | |
1a0e70ac | 4256 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4257 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4258 | char *s = malloc(len); | |
4259 | ||
4260 | if (s) { | |
4261 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4262 | if (ret < 0 || ret >= len) { | |
4263 | free(s); | |
4264 | s = NULL; | |
4265 | } | |
4266 | } | |
a73846d8 | 4267 | |
f5dd1d53 SH |
4268 | return s; |
4269 | } | |
4270 | ||
4271 | static char *get_timestamp(char* snappath, char *name) | |
4272 | { | |
8a22c168 | 4273 | char path[PATH_MAX], *s = NULL; |
f5dd1d53 SH |
4274 | int ret, len; |
4275 | FILE *fin; | |
4276 | ||
8a22c168 CB |
4277 | ret = snprintf(path, PATH_MAX, "%s/%s/ts", snappath, name); |
4278 | if (ret < 0 || ret >= PATH_MAX) | |
f5dd1d53 | 4279 | return NULL; |
a73846d8 | 4280 | |
025ed0f3 | 4281 | fin = fopen(path, "r"); |
025ed0f3 | 4282 | if (!fin) |
f5dd1d53 | 4283 | return NULL; |
a73846d8 | 4284 | |
f5dd1d53 SH |
4285 | (void) fseek(fin, 0, SEEK_END); |
4286 | len = ftell(fin); | |
4287 | (void) fseek(fin, 0, SEEK_SET); | |
4288 | if (len > 0) { | |
4289 | s = malloc(len+1); | |
4290 | if (s) { | |
4291 | s[len] = '\0'; | |
4292 | if (fread(s, 1, len, fin) != len) { | |
4293 | SYSERROR("reading timestamp"); | |
4294 | free(s); | |
4295 | s = NULL; | |
4296 | } | |
4297 | } | |
4298 | } | |
a73846d8 | 4299 | |
f5dd1d53 SH |
4300 | fclose(fin); |
4301 | return s; | |
4302 | } | |
4303 | ||
858377e4 | 4304 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 | 4305 | { |
8a22c168 | 4306 | char snappath[PATH_MAX], path2[PATH_MAX]; |
18aa217b | 4307 | int count = 0, ret; |
74f96976 | 4308 | struct dirent *direntp; |
f5dd1d53 SH |
4309 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4310 | DIR *dir; | |
4311 | ||
4312 | if (!c || !lxcapi_is_defined(c)) | |
4313 | return -1; | |
c868b261 | 4314 | |
18aa217b | 4315 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4316 | ERROR("path name too long"); |
4317 | return -1; | |
4318 | } | |
a73846d8 | 4319 | |
025ed0f3 | 4320 | dir = opendir(snappath); |
025ed0f3 | 4321 | if (!dir) { |
a73846d8 | 4322 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4323 | return 0; |
4324 | } | |
4325 | ||
74f96976 | 4326 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4327 | if (!strcmp(direntp->d_name, ".")) |
4328 | continue; | |
4329 | ||
4330 | if (!strcmp(direntp->d_name, "..")) | |
4331 | continue; | |
4332 | ||
8a22c168 CB |
4333 | ret = snprintf(path2, PATH_MAX, "%s/%s/config", snappath, direntp->d_name); |
4334 | if (ret < 0 || ret >= PATH_MAX) { | |
f5dd1d53 SH |
4335 | ERROR("pathname too long"); |
4336 | goto out_free; | |
4337 | } | |
a73846d8 | 4338 | |
f5dd1d53 SH |
4339 | if (!file_exists(path2)) |
4340 | continue; | |
a73846d8 | 4341 | |
f5dd1d53 SH |
4342 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4343 | if (!nsnaps) { | |
4344 | SYSERROR("Out of memory"); | |
4345 | goto out_free; | |
4346 | } | |
a73846d8 | 4347 | |
f5dd1d53 SH |
4348 | snaps = nsnaps; |
4349 | snaps[count].free = lxcsnap_free; | |
4350 | snaps[count].name = strdup(direntp->d_name); | |
4351 | if (!snaps[count].name) | |
4352 | goto out_free; | |
a73846d8 | 4353 | |
f5dd1d53 SH |
4354 | snaps[count].lxcpath = strdup(snappath); |
4355 | if (!snaps[count].lxcpath) { | |
4356 | free(snaps[count].name); | |
4357 | goto out_free; | |
4358 | } | |
a73846d8 | 4359 | |
f5dd1d53 SH |
4360 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4361 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4362 | count++; | |
4363 | } | |
4364 | ||
4365 | if (closedir(dir)) | |
a73846d8 | 4366 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4367 | |
4368 | *ret_snaps = snaps; | |
4369 | return count; | |
4370 | ||
4371 | out_free: | |
4372 | if (snaps) { | |
4373 | int i; | |
a73846d8 | 4374 | |
f5dd1d53 SH |
4375 | for (i=0; i<count; i++) |
4376 | lxcsnap_free(&snaps[i]); | |
a73846d8 | 4377 | |
f5dd1d53 SH |
4378 | free(snaps); |
4379 | } | |
a73846d8 | 4380 | |
9baa57bd | 4381 | if (closedir(dir)) |
a73846d8 | 4382 | WARN("Failed to close directory"); |
4383 | ||
f5dd1d53 SH |
4384 | return -1; |
4385 | } | |
4386 | ||
858377e4 SH |
4387 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4388 | ||
4389 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 | 4390 | { |
8a22c168 | 4391 | char clonelxcpath[PATH_MAX]; |
18aa217b | 4392 | int flags = 0; |
f5dd1d53 | 4393 | struct lxc_container *snap, *rest; |
10bc1861 | 4394 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4395 | bool b = false; |
4396 | ||
4397 | if (!c || !c->name || !c->config_path) | |
4398 | return false; | |
4399 | ||
18aa217b SH |
4400 | if (has_fs_snapshots(c)) { |
4401 | ERROR("container rootfs has dependent snapshots"); | |
4402 | return false; | |
4403 | } | |
4404 | ||
8a388ed4 | 4405 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4406 | if (!bdev) { |
4407 | ERROR("Failed to find original backing store type"); | |
4408 | return false; | |
4409 | } | |
4410 | ||
17a367d8 CB |
4411 | /* For an overlay container the rootfs is considered immutable |
4412 | * and cannot be removed when restoring from a snapshot. We pass this | |
4413 | * internal flag along to communicate this to various parts of the | |
4414 | * codebase. | |
4415 | */ | |
4416 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4417 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4418 | ||
f5dd1d53 SH |
4419 | if (!newname) |
4420 | newname = c->name; | |
7e36f87e | 4421 | |
18aa217b | 4422 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4423 | storage_put(bdev); |
f5dd1d53 SH |
4424 | return false; |
4425 | } | |
1a0e70ac | 4426 | /* how should we lock this? */ |
f5dd1d53 SH |
4427 | |
4428 | snap = lxc_container_new(snapname, clonelxcpath); | |
4429 | if (!snap || !lxcapi_is_defined(snap)) { | |
4430 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4431 | |
17a367d8 CB |
4432 | if (snap) |
4433 | lxc_container_put(snap); | |
a73846d8 | 4434 | |
10bc1861 | 4435 | storage_put(bdev); |
f5dd1d53 SH |
4436 | return false; |
4437 | } | |
4438 | ||
17a367d8 CB |
4439 | if (!strcmp(c->name, newname)) { |
4440 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4441 | ERROR("Could not destroy existing container %s", newname); |
4442 | lxc_container_put(snap); | |
10bc1861 | 4443 | storage_put(bdev); |
7e36f87e ÇO |
4444 | return false; |
4445 | } | |
4446 | } | |
4447 | ||
de269ee8 SH |
4448 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4449 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4450 | |
4451 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4452 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4453 | |
09f6f8c4 CB |
4454 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4455 | NULL, 0, NULL); | |
10bc1861 | 4456 | storage_put(bdev); |
f5dd1d53 SH |
4457 | if (rest && lxcapi_is_defined(rest)) |
4458 | b = true; | |
a73846d8 | 4459 | |
f5dd1d53 SH |
4460 | if (rest) |
4461 | lxc_container_put(rest); | |
17a367d8 | 4462 | |
f5dd1d53 SH |
4463 | lxc_container_put(snap); |
4464 | return b; | |
4465 | } | |
4466 | ||
858377e4 SH |
4467 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4468 | ||
18aa217b | 4469 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4470 | { |
771d96b3 | 4471 | struct lxc_container *snap = NULL; |
18aa217b | 4472 | bool bret = false; |
771d96b3 ÇO |
4473 | |
4474 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4475 | if (!snap) { |
771d96b3 ÇO |
4476 | ERROR("Could not find snapshot %s", snapname); |
4477 | goto err; | |
4478 | } | |
4479 | ||
858377e4 | 4480 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4481 | ERROR("Could not destroy snapshot %s", snapname); |
4482 | goto err; | |
4483 | } | |
a73846d8 | 4484 | |
18aa217b | 4485 | bret = true; |
771d96b3 | 4486 | |
771d96b3 ÇO |
4487 | err: |
4488 | if (snap) | |
4489 | lxc_container_put(snap); | |
a73846d8 | 4490 | |
18aa217b SH |
4491 | return bret; |
4492 | } | |
4493 | ||
4494 | static bool remove_all_snapshots(const char *path) | |
4495 | { | |
4496 | DIR *dir; | |
74f96976 | 4497 | struct dirent *direntp; |
18aa217b SH |
4498 | bool bret = true; |
4499 | ||
4500 | dir = opendir(path); | |
4501 | if (!dir) { | |
4502 | SYSERROR("opendir on snapshot path %s", path); | |
4503 | return false; | |
4504 | } | |
a73846d8 | 4505 | |
74f96976 | 4506 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4507 | if (!strcmp(direntp->d_name, ".")) |
4508 | continue; | |
a73846d8 | 4509 | |
18aa217b SH |
4510 | if (!strcmp(direntp->d_name, "..")) |
4511 | continue; | |
a73846d8 | 4512 | |
18aa217b SH |
4513 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4514 | bret = false; | |
4515 | continue; | |
4516 | } | |
4517 | } | |
4518 | ||
4519 | closedir(dir); | |
4520 | ||
4521 | if (rmdir(path)) | |
4522 | SYSERROR("Error removing directory %s", path); | |
4523 | ||
4524 | return bret; | |
4525 | } | |
4526 | ||
858377e4 | 4527 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b | 4528 | { |
8a22c168 | 4529 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4530 | |
4531 | if (!c || !c->name || !c->config_path || !snapname) | |
4532 | return false; | |
4533 | ||
4534 | if (!get_snappath_dir(c, clonelxcpath)) | |
4535 | return false; | |
4536 | ||
4537 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4538 | } | |
4539 | ||
858377e4 SH |
4540 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4541 | ||
4542 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b | 4543 | { |
8a22c168 | 4544 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4545 | |
4546 | if (!c || !c->name || !c->config_path) | |
4547 | return false; | |
4548 | ||
4549 | if (!get_snappath_dir(c, clonelxcpath)) | |
4550 | return false; | |
4551 | ||
4552 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4553 | } |
4554 | ||
858377e4 SH |
4555 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4556 | ||
4557 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4558 | { |
5106ecd0 | 4559 | if (!c) |
4560 | return false; | |
4561 | ||
b494d2dd SH |
4562 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4563 | } | |
4564 | ||
858377e4 SH |
4565 | WRAP_API(bool, lxcapi_may_control) |
4566 | ||
d5aa23e6 | 4567 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4568 | struct stat *st) |
d5aa23e6 | 4569 | { |
b69dfc9f CB |
4570 | int ret; |
4571 | char *tmp; | |
4572 | pid_t pid; | |
8a22c168 | 4573 | char chrootpath[PATH_MAX]; |
d5aa23e6 | 4574 | char *directory_path = NULL; |
d5aa23e6 | 4575 | |
b69dfc9f CB |
4576 | pid = fork(); |
4577 | if (pid < 0) { | |
4578 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4579 | return false; |
4580 | } | |
b69dfc9f | 4581 | |
d5aa23e6 | 4582 | if (pid) { |
b69dfc9f CB |
4583 | ret = wait_for_pid(pid); |
4584 | if (ret != 0) { | |
4585 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4586 | return false; |
4587 | } | |
b69dfc9f | 4588 | |
d5aa23e6 SH |
4589 | return true; |
4590 | } | |
4591 | ||
4592 | /* prepare the path */ | |
8a22c168 CB |
4593 | ret = snprintf(chrootpath, PATH_MAX, "/proc/%d/root", init_pid); |
4594 | if (ret < 0 || ret >= PATH_MAX) | |
d5aa23e6 SH |
4595 | return false; |
4596 | ||
b69dfc9f CB |
4597 | ret = chroot(chrootpath); |
4598 | if (ret < 0) | |
a7764ce7 | 4599 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4600 | |
4601 | ret = chdir("/"); | |
4602 | if (ret < 0) | |
a7764ce7 | 4603 | _exit(EXIT_FAILURE); |
b69dfc9f | 4604 | |
d5aa23e6 | 4605 | /* remove path if it exists */ |
b69dfc9f CB |
4606 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4607 | if(ret == 0) { | |
4608 | ret = unlink(path); | |
c7d76c09 | 4609 | if (ret < 0) { |
6d1400b5 | 4610 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4611 | _exit(EXIT_FAILURE); |
c7d76c09 | 4612 | } |
d5aa23e6 | 4613 | } |
b69dfc9f | 4614 | |
d5aa23e6 | 4615 | if (!add) |
a7764ce7 | 4616 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4617 | |
4618 | /* create any missing directories */ | |
b69dfc9f CB |
4619 | tmp = strdup(path); |
4620 | if (!tmp) | |
a7764ce7 | 4621 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4622 | |
4623 | directory_path = dirname(tmp); | |
4624 | ret = mkdir_p(directory_path, 0755); | |
4625 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4626 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4627 | free(tmp); |
a7764ce7 | 4628 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4629 | } |
4630 | ||
4631 | /* create the device node */ | |
b69dfc9f CB |
4632 | ret = mknod(path, st->st_mode, st->st_rdev); |
4633 | free(tmp); | |
c7d76c09 | 4634 | if (ret < 0) { |
6d1400b5 | 4635 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4636 | _exit(EXIT_FAILURE); |
c7d76c09 | 4637 | } |
d5aa23e6 | 4638 | |
a7764ce7 | 4639 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4640 | } |
4641 | ||
f0ca2726 | 4642 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4643 | { |
4644 | int ret; | |
4645 | struct stat st; | |
238b3e5e | 4646 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4647 | const char *p; |
caab004f | 4648 | pid_t init_pid; |
a9a0ed90 ÇO |
4649 | |
4650 | /* make sure container is running */ | |
858377e4 | 4651 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4652 | ERROR("container is not running"); |
d5aa23e6 | 4653 | return false; |
a9a0ed90 ÇO |
4654 | } |
4655 | ||
4656 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4657 | p = dest_path ? dest_path : src_path; | |
4658 | ||
a9a0ed90 ÇO |
4659 | /* make sure we can access p */ |
4660 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4661 | return false; |
a9a0ed90 ÇO |
4662 | |
4663 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4664 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4665 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4666 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4667 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4668 | else |
d5aa23e6 | 4669 | return false; |
a9a0ed90 ÇO |
4670 | |
4671 | /* check snprintf return code */ | |
238b3e5e | 4672 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4673 | return false; |
a9a0ed90 | 4674 | |
caab004f TA |
4675 | init_pid = do_lxcapi_init_pid(c); |
4676 | if (init_pid < 0) { | |
4677 | ERROR("Failed to get init pid"); | |
4678 | return false; | |
4679 | } | |
4680 | ||
4681 | if (!do_add_remove_node(init_pid, p, add, &st)) | |
d5aa23e6 | 4682 | return false; |
a9a0ed90 | 4683 | |
d5aa23e6 | 4684 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4685 | if (add) { |
858377e4 | 4686 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4687 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4688 | return false; |
a9a0ed90 ÇO |
4689 | } |
4690 | } else { | |
858377e4 | 4691 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4692 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4693 | return false; |
a9a0ed90 ÇO |
4694 | } |
4695 | } | |
d5aa23e6 | 4696 | |
a9a0ed90 | 4697 | return true; |
a9a0ed90 ÇO |
4698 | } |
4699 | ||
858377e4 | 4700 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4701 | { |
e0010464 | 4702 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4703 | if (am_host_unpriv()) { |
238b3e5e | 4704 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4705 | return false; |
4706 | } | |
a73846d8 | 4707 | |
a9a0ed90 ÇO |
4708 | return add_remove_device_node(c, src_path, dest_path, true); |
4709 | } | |
4710 | ||
858377e4 SH |
4711 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4712 | ||
4713 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4714 | { |
e0010464 | 4715 | if (am_guest_unpriv()) { |
238b3e5e | 4716 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4717 | return false; |
4718 | } | |
a73846d8 | 4719 | |
a9a0ed90 ÇO |
4720 | return add_remove_device_node(c, src_path, dest_path, false); |
4721 | } | |
4722 | ||
858377e4 SH |
4723 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4724 | ||
c7d76c09 CB |
4725 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4726 | const char *ifname, | |
4727 | const char *dst_ifname) | |
e58fae8f | 4728 | { |
c7d76c09 | 4729 | pid_t init_pid; |
e58fae8f | 4730 | int ret = 0; |
c7d76c09 | 4731 | |
e0010464 | 4732 | if (am_guest_unpriv()) { |
238b3e5e | 4733 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4734 | return false; |
4735 | } | |
4736 | ||
4737 | if (!ifname) { | |
4738 | ERROR("No source interface name given"); | |
4739 | return false; | |
4740 | } | |
4741 | ||
4742 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4743 | if (ret > 0) { |
4744 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4745 | ret = lxc_netdev_down(ifname); |
4746 | if (ret) | |
4747 | goto err; | |
4748 | } | |
4749 | ||
c7d76c09 | 4750 | init_pid = do_lxcapi_init_pid(c); |
caab004f TA |
4751 | if (init_pid < 0) { |
4752 | ERROR("Failed to get init pid"); | |
4753 | goto err; | |
4754 | } | |
4755 | ||
c7d76c09 | 4756 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); |
e58fae8f DY |
4757 | if (ret) |
4758 | goto err; | |
4759 | ||
c7d76c09 | 4760 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4761 | return true; |
e5848d39 | 4762 | |
e58fae8f | 4763 | err: |
e58fae8f DY |
4764 | return false; |
4765 | } | |
4766 | ||
858377e4 SH |
4767 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4768 | ||
c7d76c09 CB |
4769 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4770 | const char *ifname, | |
4771 | const char *dst_ifname) | |
e58fae8f | 4772 | { |
c7d76c09 | 4773 | int ret; |
e58fae8f DY |
4774 | pid_t pid, pid_outside; |
4775 | ||
e0010464 SH |
4776 | /* |
4777 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4778 | * But for other types guest privilege suffices. | |
4779 | */ | |
4780 | if (am_guest_unpriv()) { | |
238b3e5e | 4781 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4782 | return false; |
4783 | } | |
4784 | ||
4785 | if (!ifname) { | |
4786 | ERROR("No source interface name given"); | |
4787 | return false; | |
4788 | } | |
4789 | ||
0059379f | 4790 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4791 | pid = fork(); |
4792 | if (pid < 0) { | |
c7d76c09 | 4793 | ERROR("Failed to fork"); |
e58fae8f DY |
4794 | return false; |
4795 | } | |
4796 | ||
1a0e70ac | 4797 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4798 | pid_t init_pid; |
4799 | ||
4800 | init_pid = do_lxcapi_init_pid(c); | |
caab004f TA |
4801 | if (init_pid < 0) { |
4802 | ERROR("Failed to get init pid"); | |
4803 | _exit(EXIT_FAILURE); | |
4804 | } | |
acbfeda8 CB |
4805 | if (!switch_to_ns(init_pid, "net")) { |
4806 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4807 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4808 | } |
4809 | ||
4810 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4811 | if (ret < 0) { |
4812 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4813 | _exit(EXIT_FAILURE); |
c7d76c09 | 4814 | } |
e58fae8f DY |
4815 | |
4816 | /* netdev of ifname is up. */ | |
4817 | if (ret) { | |
4818 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4819 | if (ret) { |
4820 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4821 | _exit(EXIT_FAILURE); |
c7d76c09 | 4822 | } |
e58fae8f DY |
4823 | } |
4824 | ||
4825 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4826 | /* -EINVAL means there is no netdev named as ifname. */ |
4827 | if (ret < 0) { | |
4828 | if (ret == -EINVAL) | |
4829 | ERROR("Network device \"%s\" not found", ifname); | |
4830 | else | |
4831 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4832 | |
8d7b6c25 | 4833 | _exit(EXIT_FAILURE); |
e58fae8f | 4834 | } |
c7d76c09 | 4835 | |
8d7b6c25 | 4836 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4837 | } |
4838 | ||
c7d76c09 CB |
4839 | ret = wait_for_pid(pid); |
4840 | if (ret != 0) | |
e58fae8f DY |
4841 | return false; |
4842 | ||
c7d76c09 | 4843 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4844 | return true; |
4845 | } | |
4846 | ||
858377e4 SH |
4847 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4848 | ||
aef3d51e TA |
4849 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4850 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4851 | { |
6b9be523 | 4852 | int ret = -1; |
2cb80427 | 4853 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4854 | uint64_t features_to_check = 0; |
85c50991 | 4855 | |
aef3d51e TA |
4856 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4857 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4858 | * to do anything special. | |
4859 | */ | |
4860 | if (size > sizeof(*opts)) { | |
4861 | unsigned char *addr; | |
4862 | unsigned char *end; | |
4863 | ||
4864 | addr = (void *)opts + sizeof(*opts); | |
4865 | end = (void *)opts + size; | |
a73846d8 | 4866 | |
4867 | for (; addr < end; addr++) | |
4868 | if (*addr) | |
aef3d51e | 4869 | return -E2BIG; |
85c50991 TA |
4870 | } |
4871 | ||
2cb80427 TA |
4872 | /* If the caller has a smaller struct, let's zero out the end for them |
4873 | * so we don't accidentally use bits of it that they didn't know about | |
4874 | * to initialize. | |
4875 | */ | |
4876 | if (size < sizeof(*opts)) { | |
4877 | valid_opts = malloc(sizeof(*opts)); | |
4878 | if (!valid_opts) | |
4879 | return -ENOMEM; | |
4880 | ||
4881 | memset(valid_opts, 0, sizeof(*opts)); | |
4882 | memcpy(valid_opts, opts, size); | |
4883 | } | |
4884 | ||
aef3d51e TA |
4885 | switch (cmd) { |
4886 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4887 | if (!do_lxcapi_is_running(c)) { |
4888 | ERROR("container is not running"); | |
6b9be523 | 4889 | goto on_error; |
7ad13c91 | 4890 | } |
a73846d8 | 4891 | |
2cb80427 | 4892 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4893 | break; |
4894 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4895 | if (!do_lxcapi_is_running(c)) { |
4896 | ERROR("container is not running"); | |
6b9be523 | 4897 | goto on_error; |
7ad13c91 | 4898 | } |
a73846d8 | 4899 | |
2cb80427 | 4900 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4901 | break; |
4902 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4903 | if (do_lxcapi_is_running(c)) { |
4904 | ERROR("container is already running"); | |
6b9be523 | 4905 | goto on_error; |
7ad13c91 | 4906 | } |
a73846d8 | 4907 | |
2cb80427 | 4908 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4909 | break; |
b5b12b9e AR |
4910 | case MIGRATE_FEATURE_CHECK: |
4911 | features_to_check = valid_opts->features_to_check; | |
4912 | ret = !__criu_check_feature(&features_to_check); | |
4913 | if (ret) { | |
4914 | /* Something went wrong. Let's let the caller | |
4915 | * know which feature checks failed. */ | |
4916 | valid_opts->features_to_check = features_to_check; | |
4917 | } | |
4918 | break; | |
aef3d51e TA |
4919 | default: |
4920 | ERROR("invalid migrate command %u", cmd); | |
4921 | ret = -EINVAL; | |
4922 | } | |
735f2c6e | 4923 | |
6b9be523 | 4924 | on_error: |
f686506d TA |
4925 | if (size < sizeof(*opts)) |
4926 | free(valid_opts); | |
4927 | ||
aef3d51e TA |
4928 | return ret; |
4929 | } | |
735f2c6e | 4930 | |
aef3d51e | 4931 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4932 | |
aef3d51e TA |
4933 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4934 | { | |
ebb088e1 AR |
4935 | struct migrate_opts opts; |
4936 | ||
4937 | memset(&opts, 0, sizeof(opts)); | |
4938 | ||
4939 | opts.directory = directory; | |
4940 | opts.stop = stop; | |
4941 | opts.verbose = verbose; | |
735f2c6e | 4942 | |
aef3d51e | 4943 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4944 | } |
4945 | ||
858377e4 SH |
4946 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4947 | ||
4948 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4949 | { |
ebb088e1 AR |
4950 | struct migrate_opts opts; |
4951 | ||
4952 | memset(&opts, 0, sizeof(opts)); | |
4953 | ||
4954 | opts.directory = directory; | |
4955 | opts.verbose = verbose; | |
c9d8f2ee | 4956 | |
aef3d51e | 4957 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4958 | } |
4959 | ||
858377e4 SH |
4960 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4961 | ||
1f5a90f9 CB |
4962 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4963 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4964 | { | |
4965 | char *dirdup, *destdirname; | |
4966 | int ret; | |
4967 | ||
4968 | dirdup = strdup(dest); | |
4969 | if (!dirdup) { | |
4970 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4971 | return -1; | |
4972 | } | |
4973 | destdirname = dirname(dirdup); | |
4974 | ||
4975 | ret = mkdir_p(destdirname, 0755); | |
4976 | if (ret < 0) { | |
4977 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4978 | free(dirdup); | |
4979 | return ret; | |
4980 | } | |
4981 | free(dirdup); | |
4982 | ||
4983 | (void)remove(dest); | |
4984 | ||
4985 | if (S_ISDIR(st_mode)) | |
4986 | ret = mkdir(dest, 0000); | |
4987 | else | |
4988 | ret = mknod(dest, S_IFREG | 0000, 0); | |
71521317 SG |
4989 | |
4990 | if (ret == 0) | |
4991 | TRACE("Created mount target \"%s\"", dest); | |
d8bc14a7 | 4992 | else if (ret < 0 && errno != EEXIST) { |
1f5a90f9 CB |
4993 | SYSERROR("Failed to create mount target \"%s\"", dest); |
4994 | return -1; | |
4995 | } | |
4996 | ||
4997 | return 0; | |
4998 | } | |
4999 | ||
3340f441 CB |
5000 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
5001 | const char *target, const char *filesystemtype, | |
5002 | unsigned long mountflags, const void *data, | |
5003 | struct lxc_mount *mnt) | |
5004 | { | |
29df56cd | 5005 | char *suff, *sret; |
8a22c168 | 5006 | char template[PATH_MAX], path[PATH_MAX]; |
29df56cd | 5007 | pid_t pid, init_pid; |
c6885c3f | 5008 | struct stat sb; |
ecce75a6 | 5009 | bool is_dir; |
29df56cd LT |
5010 | int ret = -1, fd = -EBADF; |
5011 | ||
5012 | if (!c || !c->lxc_conf) { | |
5013 | ERROR("Container or configuration is NULL"); | |
5014 | return -EINVAL; | |
5015 | } | |
5016 | ||
7a41e857 | 5017 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
5018 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
5019 | return -EINVAL; | |
5020 | } | |
29df56cd | 5021 | |
60534030 LT |
5022 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
5023 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
5024 | SYSERROR("Error writing shmounts tempdir name"); |
5025 | goto out; | |
5026 | } | |
5027 | ||
c6885c3f LT |
5028 | /* Create a temporary file / dir under the shared mountpoint */ |
5029 | if (!source || strcmp(source, "") == 0) { | |
5030 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
5031 | sb.st_mode = S_IFDIR; | |
5032 | } else { | |
5033 | ret = stat(source, &sb); | |
5034 | if (ret < 0) { | |
5035 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5036 | goto out; | |
5037 | } | |
5038 | } | |
5039 | ||
ecce75a6 CB |
5040 | is_dir = (S_ISDIR(sb.st_mode) != 0); |
5041 | if (is_dir) { | |
c6885c3f LT |
5042 | sret = mkdtemp(template); |
5043 | if (!sret) { | |
5044 | SYSERROR("Could not create shmounts temporary dir"); | |
5045 | goto out; | |
5046 | } | |
c6885c3f LT |
5047 | } else { |
5048 | fd = lxc_make_tmpfile(template, false); | |
5049 | if (fd < 0) { | |
5050 | SYSERROR("Could not create shmounts temporary file"); | |
5051 | goto out; | |
5052 | } | |
29df56cd LT |
5053 | } |
5054 | ||
5055 | /* Do the fork */ | |
5056 | pid = fork(); | |
5057 | if (pid < 0) { | |
5058 | SYSERROR("Could not fork"); | |
5059 | goto out; | |
5060 | } | |
5061 | ||
5062 | if (pid == 0) { | |
5063 | /* Do the mount */ | |
5064 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5065 | if (ret < 0) { | |
c6885c3f | 5066 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5067 | _exit(EXIT_FAILURE); |
5068 | } | |
3340f441 | 5069 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5070 | |
5071 | init_pid = do_lxcapi_init_pid(c); | |
5072 | if (init_pid < 0) { | |
5073 | ERROR("Failed to obtain container's init pid"); | |
5074 | _exit(EXIT_FAILURE); | |
5075 | } | |
5076 | ||
5077 | /* Enter the container namespaces */ | |
5078 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
4e5a9657 | 5079 | if (!switch_to_ns(init_pid, "user")) { |
29df56cd LT |
5080 | ERROR("Failed to enter user namespace"); |
5081 | _exit(EXIT_FAILURE); | |
5082 | } | |
4e5a9657 CB |
5083 | |
5084 | if (!lxc_switch_uid_gid(0, 0)) | |
5085 | _exit(EXIT_FAILURE); | |
29df56cd | 5086 | } |
3340f441 | 5087 | |
29df56cd LT |
5088 | if (!switch_to_ns(init_pid, "mnt")) { |
5089 | ERROR("Failed to enter mount namespace"); | |
5090 | _exit(EXIT_FAILURE); | |
5091 | } | |
5092 | ||
71521317 SG |
5093 | ret = create_mount_target(target, sb.st_mode); |
5094 | if (ret < 0) | |
5095 | _exit(EXIT_FAILURE); | |
c6885c3f | 5096 | |
29df56cd LT |
5097 | suff = strrchr(template, '/'); |
5098 | if (!suff) | |
5099 | _exit(EXIT_FAILURE); | |
5100 | ||
60534030 LT |
5101 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5102 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd LT |
5103 | SYSERROR("Error writing container mountpoint name"); |
5104 | _exit(EXIT_FAILURE); | |
5105 | } | |
5106 | ||
3340f441 | 5107 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5108 | if (ret < 0) { |
5109 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
5110 | _exit(EXIT_FAILURE); | |
5111 | } | |
3340f441 | 5112 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5113 | |
5114 | _exit(EXIT_SUCCESS); | |
5115 | } | |
5116 | ||
5117 | ret = wait_for_pid(pid); | |
5118 | if (ret < 0) { | |
5119 | SYSERROR("Wait for the child with pid %ld failed", (long) pid); | |
5120 | goto out; | |
5121 | } | |
5122 | ||
5123 | ret = 0; | |
5124 | ||
5125 | (void)umount2(template, MNT_DETACH); | |
ecce75a6 CB |
5126 | if (is_dir) |
5127 | (void)rmdir(template); | |
5128 | else | |
5129 | (void)unlink(template); | |
29df56cd LT |
5130 | |
5131 | out: | |
5132 | if (fd >= 0) | |
5133 | close(fd); | |
3340f441 | 5134 | |
29df56cd LT |
5135 | return ret; |
5136 | } | |
5137 | ||
5138 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5139 | unsigned long, const void *, struct lxc_mount *) |
5140 | ||
5141 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5142 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5143 | { |
5144 | pid_t pid, init_pid; | |
5145 | int ret = -1; | |
5146 | ||
5147 | if (!c || !c->lxc_conf) { | |
5148 | ERROR("Container or configuration is NULL"); | |
5149 | return -EINVAL; | |
5150 | } | |
5151 | ||
5152 | /* Do the fork */ | |
5153 | pid = fork(); | |
5154 | if (pid < 0) { | |
5155 | SYSERROR("Could not fork"); | |
5156 | return -1; | |
5157 | } | |
5158 | ||
5159 | if (pid == 0) { | |
5160 | init_pid = do_lxcapi_init_pid(c); | |
5161 | if (init_pid < 0) { | |
5162 | ERROR("Failed to obtain container's init pid"); | |
5163 | _exit(EXIT_FAILURE); | |
5164 | } | |
5165 | ||
5166 | /* Enter the container namespaces */ | |
5167 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5168 | if (!switch_to_ns(init_pid, "user")) { | |
5169 | ERROR("Failed to enter user namespace"); | |
5170 | _exit(EXIT_FAILURE); | |
5171 | } | |
5172 | } | |
5173 | ||
5174 | if (!switch_to_ns(init_pid, "mnt")) { | |
5175 | ERROR("Failed to enter mount namespace"); | |
5176 | _exit(EXIT_FAILURE); | |
5177 | } | |
5178 | ||
5179 | /* Do the unmount */ | |
7a41e857 | 5180 | ret = umount2(target, flags); |
d83da817 LT |
5181 | if (ret < 0) { |
5182 | SYSERROR("Failed to umount \"%s\"", target); | |
5183 | _exit(EXIT_FAILURE); | |
5184 | } | |
5185 | ||
5186 | _exit(EXIT_SUCCESS); | |
5187 | } | |
5188 | ||
5189 | ret = wait_for_pid(pid); | |
5190 | if (ret < 0) { | |
5191 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5192 | return -ret; | |
5193 | } | |
5194 | ||
5195 | return 0; | |
5196 | } | |
5197 | ||
5198 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5199 | |
a0e93eeb CS |
5200 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5201 | { | |
5202 | va_list ap; | |
5203 | const char **argv; | |
5204 | int ret; | |
5205 | ||
5206 | if (!c) | |
5207 | return -1; | |
5208 | ||
858377e4 SH |
5209 | current_config = c->lxc_conf; |
5210 | ||
a0e93eeb CS |
5211 | va_start(ap, arg); |
5212 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5213 | va_end(ap); | |
5214 | ||
5215 | if (!argv) { | |
5216 | ERROR("Memory allocation error."); | |
858377e4 SH |
5217 | ret = -1; |
5218 | goto out; | |
a0e93eeb CS |
5219 | } |
5220 | argv[0] = arg; | |
5221 | ||
858377e4 | 5222 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5223 | free((void*)argv); |
a73846d8 | 5224 | |
858377e4 SH |
5225 | out: |
5226 | current_config = NULL; | |
a0e93eeb CS |
5227 | return ret; |
5228 | } | |
5229 | ||
afeecbba | 5230 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5231 | { |
5232 | struct lxc_container *c; | |
cbb9c7c7 | 5233 | size_t len; |
72d0e1cb | 5234 | |
18aa217b SH |
5235 | if (!name) |
5236 | return NULL; | |
5237 | ||
72d0e1cb SG |
5238 | c = malloc(sizeof(*c)); |
5239 | if (!c) { | |
e9e29a33 | 5240 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5241 | return NULL; |
5242 | } | |
5243 | memset(c, 0, sizeof(*c)); | |
5244 | ||
afeecbba SH |
5245 | if (configpath) |
5246 | c->config_path = strdup(configpath); | |
5247 | else | |
593e8478 | 5248 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5249 | if (!c->config_path) { |
e9e29a33 | 5250 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5251 | goto err; |
5252 | } | |
5253 | ||
f5dd1d53 | 5254 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5255 | |
5256 | len = strlen(name); | |
5257 | c->name = malloc(len + 1); | |
72d0e1cb | 5258 | if (!c->name) { |
e9e29a33 | 5259 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5260 | goto err; |
5261 | } | |
cbb9c7c7 | 5262 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5263 | |
5264 | c->numthreads = 1; | |
e9e29a33 CB |
5265 | c->slock = lxc_newlock(c->config_path, name); |
5266 | if (!c->slock) { | |
5267 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5268 | goto err; |
5269 | } | |
5270 | ||
e9e29a33 CB |
5271 | c->privlock = lxc_newlock(NULL, NULL); |
5272 | if (!c->privlock) { | |
5273 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5274 | goto err; |
5275 | } | |
5276 | ||
afeecbba | 5277 | if (!set_config_filename(c)) { |
e9e29a33 | 5278 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5279 | goto err; |
5280 | } | |
72d0e1cb | 5281 | |
e9e29a33 CB |
5282 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5283 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5284 | goto err; |
e9e29a33 | 5285 | } |
72d0e1cb | 5286 | |
3e625e2d | 5287 | if (ongoing_create(c) == 2) { |
e9e29a33 | 5288 | ERROR("Failed to complete container creation for %s", c->name); |
17a367d8 | 5289 | container_destroy(c, NULL); |
4df7f012 | 5290 | lxcapi_clear_config(c); |
3e625e2d | 5291 | } |
a73846d8 | 5292 | |
a2739df5 | 5293 | c->daemonize = true; |
72cf75fa | 5294 | c->pidfile = NULL; |
3e625e2d | 5295 | |
1a0e70ac | 5296 | /* Assign the member functions. */ |
72d0e1cb SG |
5297 | c->is_defined = lxcapi_is_defined; |
5298 | c->state = lxcapi_state; | |
5299 | c->is_running = lxcapi_is_running; | |
5300 | c->freeze = lxcapi_freeze; | |
5301 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5302 | c->console = lxcapi_console; |
b5159817 | 5303 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5304 | c->init_pid = lxcapi_init_pid; |
5305 | c->load_config = lxcapi_load_config; | |
5306 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5307 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5308 | c->start = lxcapi_start; |
5309 | c->startl = lxcapi_startl; | |
5310 | c->stop = lxcapi_stop; | |
5311 | c->config_file_name = lxcapi_config_file_name; | |
5312 | c->wait = lxcapi_wait; | |
5313 | c->set_config_item = lxcapi_set_config_item; | |
5314 | c->destroy = lxcapi_destroy; | |
18aa217b | 5315 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5316 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5317 | c->save_config = lxcapi_save_config; |
5318 | c->get_keys = lxcapi_get_keys; | |
5319 | c->create = lxcapi_create; | |
5320 | c->createl = lxcapi_createl; | |
5321 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5322 | c->reboot = lxcapi_reboot; |
d39b10eb | 5323 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5324 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5325 | c->clear_config_item = lxcapi_clear_config_item; |
5326 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5327 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5328 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5329 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5330 | c->get_config_path = lxcapi_get_config_path; |
5331 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5332 | c->clone = lxcapi_clone; |
799f29ab | 5333 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5334 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5335 | c->attach = lxcapi_attach; |
5336 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5337 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5338 | c->snapshot = lxcapi_snapshot; |
5339 | c->snapshot_list = lxcapi_snapshot_list; | |
5340 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5341 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5342 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5343 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5344 | c->add_device_node = lxcapi_add_device_node; |
5345 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5346 | c->attach_interface = lxcapi_attach_interface; |
5347 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5348 | c->checkpoint = lxcapi_checkpoint; |
5349 | c->restore = lxcapi_restore; | |
aef3d51e | 5350 | c->migrate = lxcapi_migrate; |
191d43cc | 5351 | c->console_log = lxcapi_console_log; |
29df56cd | 5352 | c->mount = lxcapi_mount; |
d83da817 | 5353 | c->umount = lxcapi_umount; |
72d0e1cb | 5354 | |
72d0e1cb SG |
5355 | return c; |
5356 | ||
5357 | err: | |
5358 | lxc_container_free(c); | |
5359 | return NULL; | |
5360 | } | |
5361 | ||
4a7c7daa | 5362 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5363 | { |
5364 | int i; | |
5365 | ||
5366 | if (states) | |
5367 | for (i=0; i<MAX_STATE; i++) | |
5368 | states[i] = lxc_state2str(i); | |
a73846d8 | 5369 | |
72d0e1cb SG |
5370 | return MAX_STATE; |
5371 | } | |
a41f104b | 5372 | |
a41f104b SH |
5373 | /* |
5374 | * These next two could probably be done smarter with reusing a common function | |
5375 | * with different iterators and tests... | |
5376 | */ | |
5377 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5378 | { | |
5379 | DIR *dir; | |
5380 | int i, cfound = 0, nfound = 0; | |
74f96976 | 5381 | struct dirent *direntp; |
a41f104b SH |
5382 | struct lxc_container *c; |
5383 | ||
5384 | if (!lxcpath) | |
593e8478 | 5385 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5386 | |
a41f104b | 5387 | dir = opendir(lxcpath); |
a41f104b SH |
5388 | if (!dir) { |
5389 | SYSERROR("opendir on lxcpath"); | |
5390 | return -1; | |
5391 | } | |
5392 | ||
5393 | if (cret) | |
5394 | *cret = NULL; | |
a73846d8 | 5395 | |
a41f104b SH |
5396 | if (names) |
5397 | *names = NULL; | |
5398 | ||
74f96976 | 5399 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5400 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5401 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5402 | continue; |
5403 | ||
5404 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5405 | continue; | |
5406 | ||
a73846d8 | 5407 | if (names) |
9c88ff1f | 5408 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5409 | goto free_bad; |
a73846d8 | 5410 | |
a41f104b SH |
5411 | cfound++; |
5412 | ||
5413 | if (!cret) { | |
5414 | nfound++; | |
5415 | continue; | |
5416 | } | |
5417 | ||
5418 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5419 | if (!c) { | |
5420 | INFO("Container %s:%s has a config but could not be loaded", | |
5421 | lxcpath, direntp->d_name); | |
a73846d8 | 5422 | |
a41f104b | 5423 | if (names) |
9c88ff1f ÇO |
5424 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5425 | goto free_bad; | |
a73846d8 | 5426 | |
a41f104b SH |
5427 | continue; |
5428 | } | |
a73846d8 | 5429 | |
858377e4 | 5430 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5431 | INFO("Container %s:%s has a config but is not defined", |
5432 | lxcpath, direntp->d_name); | |
a73846d8 | 5433 | |
a41f104b | 5434 | if (names) |
9c88ff1f ÇO |
5435 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5436 | goto free_bad; | |
a73846d8 | 5437 | |
a41f104b SH |
5438 | lxc_container_put(c); |
5439 | continue; | |
5440 | } | |
5441 | ||
2871830a | 5442 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5443 | lxc_container_put(c); |
5444 | goto free_bad; | |
5445 | } | |
a73846d8 | 5446 | |
a41f104b SH |
5447 | nfound++; |
5448 | } | |
5449 | ||
a41f104b | 5450 | closedir(dir); |
a41f104b SH |
5451 | return nfound; |
5452 | ||
5453 | free_bad: | |
5454 | if (names && *names) { | |
5455 | for (i=0; i<cfound; i++) | |
5456 | free((*names)[i]); | |
5457 | free(*names); | |
5458 | } | |
a73846d8 | 5459 | |
a41f104b SH |
5460 | if (cret && *cret) { |
5461 | for (i=0; i<nfound; i++) | |
5462 | lxc_container_put((*cret)[i]); | |
5463 | free(*cret); | |
5464 | } | |
a73846d8 | 5465 | |
a41f104b | 5466 | closedir(dir); |
a41f104b SH |
5467 | return -1; |
5468 | } | |
5469 | ||
148a9d27 DE |
5470 | int list_active_containers(const char *lxcpath, char ***nret, |
5471 | struct lxc_container ***cret) | |
a41f104b | 5472 | { |
148a9d27 | 5473 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5474 | int lxcpath_len; |
5475 | char *line = NULL; | |
148a9d27 | 5476 | char **ct_name = NULL; |
a41f104b | 5477 | size_t len = 0; |
97bc2422 | 5478 | struct lxc_container *c = NULL; |
88556fd7 | 5479 | bool is_hashed; |
a41f104b SH |
5480 | |
5481 | if (!lxcpath) | |
593e8478 | 5482 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5483 | lxcpath_len = strlen(lxcpath); |
5484 | ||
5485 | if (cret) | |
5486 | *cret = NULL; | |
a73846d8 | 5487 | |
148a9d27 DE |
5488 | if (nret) |
5489 | *nret = NULL; | |
a41f104b | 5490 | |
a41f104b | 5491 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
5492 | if (!f) |
5493 | return -1; | |
5494 | ||
5495 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5496 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5497 | if (!p) |
5498 | continue; | |
5499 | p++; | |
a73846d8 | 5500 | |
a41f104b SH |
5501 | if (*p != 0x40) |
5502 | continue; | |
5503 | p++; | |
88556fd7 ÇO |
5504 | |
5505 | is_hashed = false; | |
a73846d8 | 5506 | |
88556fd7 ÇO |
5507 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5508 | p += lxcpath_len; | |
5509 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5510 | p += 4; | |
5511 | is_hashed = true; | |
5512 | } else { | |
a41f104b | 5513 | continue; |
88556fd7 ÇO |
5514 | } |
5515 | ||
a41f104b SH |
5516 | while (*p == '/') |
5517 | p++; | |
5518 | ||
1a0e70ac | 5519 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5520 | p2 = strchr(p, '/'); |
a41f104b SH |
5521 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5522 | continue; | |
5523 | *p2 = '\0'; | |
5524 | ||
88556fd7 | 5525 | if (is_hashed) { |
899a9f55 CB |
5526 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5527 | if (!recvpath) | |
5528 | continue; | |
a73846d8 | 5529 | |
e07eafa8 L |
5530 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5531 | free(recvpath); | |
88556fd7 | 5532 | continue; |
e07eafa8 L |
5533 | } |
5534 | free(recvpath); | |
a73846d8 | 5535 | |
88556fd7 | 5536 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5537 | if (!p) |
5538 | continue; | |
88556fd7 ÇO |
5539 | } |
5540 | ||
e07eafa8 L |
5541 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5542 | if (is_hashed) | |
5543 | free(p); | |
9c88ff1f | 5544 | continue; |
e07eafa8 | 5545 | } |
9c88ff1f | 5546 | |
e07eafa8 L |
5547 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5548 | if (is_hashed) | |
5549 | free(p); | |
148a9d27 | 5550 | goto free_cret_list; |
e07eafa8 | 5551 | } |
9c88ff1f | 5552 | |
148a9d27 | 5553 | ct_name_cnt++; |
a41f104b | 5554 | |
e07eafa8 L |
5555 | if (!cret) { |
5556 | if (is_hashed) | |
5557 | free(p); | |
a41f104b | 5558 | continue; |
e07eafa8 | 5559 | } |
a41f104b SH |
5560 | |
5561 | c = lxc_container_new(p, lxcpath); | |
5562 | if (!c) { | |
5563 | INFO("Container %s:%s is running but could not be loaded", | |
5564 | lxcpath, p); | |
a73846d8 | 5565 | |
148a9d27 | 5566 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5567 | if (is_hashed) |
5568 | free(p); | |
a73846d8 | 5569 | |
a41f104b SH |
5570 | continue; |
5571 | } | |
5572 | ||
e07eafa8 L |
5573 | if (is_hashed) |
5574 | free(p); | |
5575 | ||
a41f104b SH |
5576 | /* |
5577 | * If this is an anonymous container, then is_defined *can* | |
5578 | * return false. So we don't do that check. Count on the | |
5579 | * fact that the command socket exists. | |
5580 | */ | |
5581 | ||
148a9d27 | 5582 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5583 | lxc_container_put(c); |
148a9d27 | 5584 | goto free_cret_list; |
a41f104b | 5585 | } |
a73846d8 | 5586 | |
148a9d27 | 5587 | cret_cnt++; |
a41f104b SH |
5588 | } |
5589 | ||
97bc2422 CB |
5590 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5591 | if (c) | |
5592 | lxc_container_put(c); | |
5593 | goto free_cret_list; | |
5594 | } | |
5595 | ||
148a9d27 DE |
5596 | ret = ct_name_cnt; |
5597 | if (nret) | |
5598 | *nret = ct_name; | |
5599 | else | |
5600 | goto free_ct_name; | |
a73846d8 | 5601 | |
148a9d27 | 5602 | goto out; |
a41f104b | 5603 | |
148a9d27 | 5604 | free_cret_list: |
a41f104b | 5605 | if (cret && *cret) { |
148a9d27 | 5606 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5607 | lxc_container_put((*cret)[i]); |
5608 | free(*cret); | |
5609 | } | |
148a9d27 DE |
5610 | |
5611 | free_ct_name: | |
5612 | if (ct_name) { | |
5613 | for (i = 0; i < ct_name_cnt; i++) | |
5614 | free(ct_name[i]); | |
5615 | free(ct_name); | |
5616 | } | |
5617 | ||
5618 | out: | |
f10fad2f | 5619 | free(line); |
a41f104b | 5620 | fclose(f); |
148a9d27 | 5621 | return ret; |
a41f104b | 5622 | } |
2871830a DE |
5623 | |
5624 | int list_all_containers(const char *lxcpath, char ***nret, | |
5625 | struct lxc_container ***cret) | |
5626 | { | |
5627 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5628 | char **active_name; | |
5629 | char **ct_name; | |
5630 | struct lxc_container **ct_list = NULL; | |
5631 | ||
5632 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5633 | if (ct_cnt < 0) | |
5634 | return ct_cnt; | |
5635 | ||
5636 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5637 | if (active_cnt < 0) { | |
5638 | ret = active_cnt; | |
5639 | goto free_ct_name; | |
5640 | } | |
5641 | ||
5642 | for (i = 0; i < active_cnt; i++) { | |
5643 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5644 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5645 | ret = -1; | |
5646 | goto free_active_name; | |
5647 | } | |
a73846d8 | 5648 | |
2871830a DE |
5649 | ct_cnt++; |
5650 | } | |
a73846d8 | 5651 | |
2871830a DE |
5652 | free(active_name[i]); |
5653 | active_name[i] = NULL; | |
5654 | } | |
a73846d8 | 5655 | |
2871830a DE |
5656 | free(active_name); |
5657 | active_name = NULL; | |
5658 | active_cnt = 0; | |
5659 | ||
5660 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5661 | struct lxc_container *c; | |
5662 | ||
5663 | c = lxc_container_new(ct_name[i], lxcpath); | |
5664 | if (!c) { | |
5665 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5666 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5667 | continue; | |
5668 | } | |
5669 | ||
5670 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5671 | lxc_container_put(c); | |
5672 | ret = -1; | |
5673 | goto free_ct_list; | |
5674 | } | |
a73846d8 | 5675 | |
2871830a DE |
5676 | ct_list_cnt++; |
5677 | } | |
5678 | ||
5679 | if (cret) | |
5680 | *cret = ct_list; | |
5681 | ||
a73846d8 | 5682 | if (nret) { |
2871830a | 5683 | *nret = ct_name; |
a73846d8 | 5684 | } else { |
2871830a DE |
5685 | ret = ct_cnt; |
5686 | goto free_ct_name; | |
5687 | } | |
a73846d8 | 5688 | |
2871830a DE |
5689 | return ct_cnt; |
5690 | ||
5691 | free_ct_list: | |
5692 | for (i = 0; i < ct_list_cnt; i++) { | |
5693 | lxc_container_put(ct_list[i]); | |
5694 | } | |
f10fad2f | 5695 | free(ct_list); |
2871830a DE |
5696 | |
5697 | free_active_name: | |
5698 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5699 | free(active_name[i]); |
2871830a | 5700 | } |
f10fad2f | 5701 | free(active_name); |
2871830a DE |
5702 | |
5703 | free_ct_name: | |
5704 | for (i = 0; i < ct_cnt; i++) { | |
5705 | free(ct_name[i]); | |
5706 | } | |
5707 | free(ct_name); | |
5708 | return ret; | |
5709 | } | |
12461428 CB |
5710 | |
5711 | bool lxc_config_item_is_supported(const char *key) | |
5712 | { | |
300df83e | 5713 | return !!lxc_get_config(key); |
12461428 | 5714 | } |
aafa5f96 CB |
5715 | |
5716 | bool lxc_has_api_extension(const char *extension) | |
5717 | { | |
5718 | /* The NULL API extension is always present. :) */ | |
5719 | if (!extension) | |
5720 | return true; | |
5721 | ||
5722 | for (size_t i = 0; i < nr_api_extensions; i++) | |
5723 | if (strcmp(api_extensions[i], extension) == 0) | |
5724 | return true; | |
5725 | ||
5726 | return false; | |
5727 | } |