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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 | |
fa2bb6ba SH |
82 | #if HAVE_OPENSSL |
83 | #include <openssl/evp.h> | |
84 | #endif | |
85 | ||
af6824fc ST |
86 | /* major()/minor() */ |
87 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 88 | #include <sys/mkdev.h> |
af6824fc | 89 | #endif |
af6824fc | 90 | |
684f79a5 SG |
91 | #if IS_BIONIC |
92 | #include <../include/lxcmntent.h> | |
93 | #else | |
94 | #include <mntent.h> | |
95 | #endif | |
96 | ||
9de31d5a CB |
97 | #ifndef HAVE_STRLCPY |
98 | #include "include/strlcpy.h" | |
99 | #endif | |
100 | ||
5f7eba0b SG |
101 | /* Define faccessat() if missing from the C library */ |
102 | #ifndef HAVE_FACCESSAT | |
103 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
104 | { | |
105 | #ifdef __NR_faccessat | |
238b3e5e | 106 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 107 | #else |
238b3e5e CB |
108 | errno = ENOSYS; |
109 | return -1; | |
5f7eba0b SG |
110 | #endif |
111 | } | |
112 | #endif | |
113 | ||
ac2cecc4 | 114 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 115 | |
858377e4 SH |
116 | static bool do_lxcapi_destroy(struct lxc_container *c); |
117 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
118 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
119 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
120 | static bool container_destroy(struct lxc_container *c, |
121 | struct lxc_storage *storage); | |
858377e4 SH |
122 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
123 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
124 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
125 | ||
a41f104b SH |
126 | static bool config_file_exists(const char *lxcpath, const char *cname) |
127 | { | |
7a99b5a0 | 128 | __do_free char *fname = NULL; |
ef1ab8f1 CB |
129 | int ret; |
130 | size_t len; | |
a41f104b | 131 | |
ef1ab8f1 CB |
132 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
133 | len = strlen(lxcpath) + strlen(cname) + 9; | |
f5849fd7 | 134 | fname = must_realloc(NULL, len); |
ef1ab8f1 CB |
135 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); |
136 | if (ret < 0 || (size_t)ret >= len) | |
a41f104b SH |
137 | return false; |
138 | ||
139 | return file_exists(fname); | |
140 | } | |
141 | ||
9fbe07f6 RK |
142 | /* |
143 | * A few functions to help detect when a container creation failed. If a | |
444249ea CB |
144 | * container creation was killed partway through, then trying to actually start |
145 | * that container could harm the host. We detect this by creating a 'partial' | |
146 | * file under the container directory, and keeping an advisory lock. When | |
147 | * container creation completes, we remove that file. When we load or try to | |
148 | * start a container, if we find that file, without a flock, we remove the | |
149 | * container. | |
3e625e2d | 150 | */ |
9fbe07f6 RK |
151 | enum { |
152 | LXC_CREATE_FAILED = -1, | |
153 | LXC_CREATE_SUCCESS = 0, | |
154 | LXC_CREATE_ONGOING = 1, | |
155 | LXC_CREATE_INCOMPLETE = 2, | |
156 | }; | |
157 | ||
74a3920a | 158 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 159 | { |
9fbe07f6 | 160 | __do_close_prot_errno int fd = -EBADF; |
7a99b5a0 | 161 | __do_free char *path = NULL; |
56474555 | 162 | struct flock lk = {0}; |
9fbe07f6 RK |
163 | int ret; |
164 | size_t len; | |
93dc5327 | 165 | |
444249ea | 166 | len = strlen(c->config_path) + strlen(c->name) + 10; |
f5849fd7 | 167 | path = must_realloc(NULL, len); |
3e625e2d | 168 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
444249ea | 169 | if (ret < 0 || (size_t)ret >= len) |
9fbe07f6 | 170 | return LXC_CREATE_FAILED; |
3e625e2d | 171 | |
d1bc8d48 CB |
172 | fd = open(path, O_RDWR | O_CLOEXEC); |
173 | if (fd < 0) { | |
174 | if (errno != ENOENT) | |
9fbe07f6 | 175 | return LXC_CREATE_FAILED; |
444249ea | 176 | |
9fbe07f6 | 177 | return LXC_CREATE_SUCCESS; |
d1bc8d48 | 178 | } |
444249ea | 179 | |
93dc5327 SH |
180 | lk.l_type = F_WRLCK; |
181 | lk.l_whence = SEEK_SET; | |
9fbe07f6 RK |
182 | /* |
183 | * F_OFD_GETLK requires that l_pid be set to 0 otherwise the kernel | |
ec74f3f8 CB |
184 | * will EINVAL us. |
185 | */ | |
186 | lk.l_pid = 0; | |
444249ea | 187 | |
56474555 | 188 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
d1bc8d48 | 189 | if (ret < 0 && errno == EINVAL) { |
56474555 | 190 | ret = flock(fd, LOCK_EX | LOCK_NB); |
d1bc8d48 CB |
191 | if (ret < 0 && errno == EWOULDBLOCK) |
192 | ret = 0; | |
193 | } | |
a73846d8 | 194 | |
ec74f3f8 CB |
195 | /* F_OFD_GETLK will not send us back a pid so don't check it. */ |
196 | if (ret == 0) | |
197 | /* Create is still ongoing. */ | |
9fbe07f6 | 198 | return LXC_CREATE_ONGOING; |
444249ea CB |
199 | |
200 | /* Create completed but partial is still there. */ | |
9fbe07f6 | 201 | return LXC_CREATE_INCOMPLETE; |
3e625e2d SH |
202 | } |
203 | ||
74a3920a | 204 | static int create_partial(struct lxc_container *c) |
3e625e2d | 205 | { |
7a99b5a0 | 206 | __do_free char *path = NULL; |
3e625e2d | 207 | int fd, ret; |
f5cd0252 | 208 | size_t len; |
56474555 | 209 | struct flock lk = {0}; |
93dc5327 | 210 | |
f5cd0252 CB |
211 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
212 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
f5849fd7 | 213 | path = must_realloc(NULL, len); |
3e625e2d | 214 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
f5cd0252 | 215 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 216 | return -1; |
f5cd0252 | 217 | |
d1bc8d48 | 218 | fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0000); |
f5cd0252 | 219 | if (fd < 0) |
3e625e2d | 220 | return -1; |
f5cd0252 | 221 | |
93dc5327 SH |
222 | lk.l_type = F_WRLCK; |
223 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 224 | |
56474555 | 225 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 226 | if (ret < 0) { |
56474555 CB |
227 | if (errno == EINVAL) { |
228 | ret = flock(fd, LOCK_EX); | |
229 | if (ret == 0) | |
230 | return fd; | |
231 | } | |
232 | ||
f5cd0252 | 233 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 234 | close(fd); |
3e625e2d SH |
235 | return -1; |
236 | } | |
3e625e2d SH |
237 | |
238 | return fd; | |
239 | } | |
240 | ||
74a3920a | 241 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 242 | { |
7a99b5a0 | 243 | __do_free char *path = NULL; |
3e625e2d | 244 | int ret; |
a3740e80 | 245 | size_t len; |
3e625e2d SH |
246 | |
247 | close(fd); | |
a73846d8 | 248 | |
a3740e80 CB |
249 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
250 | len = strlen(c->config_path) + strlen(c->name) + 10; | |
f5849fd7 | 251 | path = must_realloc(NULL, len); |
3e625e2d | 252 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
a3740e80 | 253 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 254 | return; |
a3740e80 CB |
255 | |
256 | ret = unlink(path); | |
257 | if (ret < 0) | |
258 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
259 | } |
260 | ||
72d0e1cb | 261 | /* LOCKING |
3bc449ed SH |
262 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
263 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
264 | * container configuration file. | |
265 | * The container_disk_lock also takes the container_mem_lock. | |
266 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
267 | * NOTHING mutexes two independent programs with their own struct |
268 | * lxc_container for the same c->name, between API calls. For instance, | |
269 | * c->config_read(); c->start(); Between those calls, data on disk | |
270 | * could change (which shouldn't bother the caller unless for instance | |
271 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
272 | * Two such updaters could race. The callers should therefore check their | |
273 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
274 | * due to hung callers. So I prefer to keep the locks only within our own | |
275 | * functions, not across functions. | |
276 | * | |
3bc449ed | 277 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
278 | * c->numthreads (under privlock) before forking. When deleting, |
279 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
280 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
281 | */ | |
72d0e1cb SG |
282 | static void lxc_container_free(struct lxc_container *c) |
283 | { | |
284 | if (!c) | |
285 | return; | |
286 | ||
f10fad2f ME |
287 | free(c->configfile); |
288 | c->configfile = NULL; | |
70849dc2 | 289 | |
f10fad2f ME |
290 | free(c->error_string); |
291 | c->error_string = NULL; | |
70849dc2 | 292 | |
d95db067 | 293 | if (c->slock) { |
df271a59 | 294 | lxc_putlock(c->slock); |
d95db067 DE |
295 | c->slock = NULL; |
296 | } | |
70849dc2 | 297 | |
72d0e1cb | 298 | if (c->privlock) { |
df271a59 | 299 | lxc_putlock(c->privlock); |
72d0e1cb SG |
300 | c->privlock = NULL; |
301 | } | |
70849dc2 | 302 | |
f10fad2f ME |
303 | free(c->name); |
304 | c->name = NULL; | |
70849dc2 | 305 | |
d95db067 DE |
306 | if (c->lxc_conf) { |
307 | lxc_conf_free(c->lxc_conf); | |
308 | c->lxc_conf = NULL; | |
309 | } | |
70849dc2 | 310 | |
f10fad2f ME |
311 | free(c->config_path); |
312 | c->config_path = NULL; | |
72cf75fa | 313 | |
72d0e1cb SG |
314 | free(c); |
315 | } | |
316 | ||
045552aa CB |
317 | /* Consider the following case: |
318 | * | |
319 | * |====================================================================| | |
320 | * | freer | racing get()er | | |
321 | * |====================================================================| | |
322 | * | lxc_container_put() | lxc_container_get() | | |
323 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
324 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
325 | * | \ lxcunlock() | \ | | |
326 | * | \ lxc_container_free() | \ lxclock() returns | | |
327 | * | | \ c->numthreads < 1 -> return 0 | | |
328 | * | \ \ (free stuff) | | | |
329 | * | \ \ sem_destroy(privlock) | | | |
330 | * |_______________________________|____________________________________| | |
331 | * | |
43d1aa34 SH |
332 | * When the get()er checks numthreads the first time, one of the following |
333 | * is true: | |
334 | * 1. freer has set numthreads = 0. get() returns 0 | |
335 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
336 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
337 | * numthreads is 0 and exit without touching lxclock again.. | |
338 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
339 | * will see --numthreads = 1 and not call lxc_container_free(). | |
340 | */ | |
341 | ||
72d0e1cb SG |
342 | int lxc_container_get(struct lxc_container *c) |
343 | { | |
344 | if (!c) | |
345 | return 0; | |
346 | ||
1a0e70ac CB |
347 | /* If someone else has already started freeing the container, don't try |
348 | * to take the lock, which may be invalid. | |
349 | */ | |
43d1aa34 SH |
350 | if (c->numthreads < 1) |
351 | return 0; | |
352 | ||
5cee8c50 | 353 | if (container_mem_lock(c)) |
72d0e1cb | 354 | return 0; |
1a0e70ac CB |
355 | |
356 | /* Bail without trying to unlock, bc the privlock is now probably in | |
357 | * freed memory. | |
358 | */ | |
359 | if (c->numthreads < 1) | |
72d0e1cb | 360 | return 0; |
1a0e70ac | 361 | |
72d0e1cb | 362 | c->numthreads++; |
5cee8c50 | 363 | container_mem_unlock(c); |
045552aa | 364 | |
72d0e1cb SG |
365 | return 1; |
366 | } | |
367 | ||
368 | int lxc_container_put(struct lxc_container *c) | |
369 | { | |
370 | if (!c) | |
371 | return -1; | |
045552aa | 372 | |
5cee8c50 | 373 | if (container_mem_lock(c)) |
72d0e1cb | 374 | return -1; |
045552aa | 375 | |
44619b6c CB |
376 | c->numthreads--; |
377 | ||
378 | if (c->numthreads < 1) { | |
5cee8c50 | 379 | container_mem_unlock(c); |
72d0e1cb SG |
380 | lxc_container_free(c); |
381 | return 1; | |
382 | } | |
045552aa | 383 | |
5cee8c50 | 384 | container_mem_unlock(c); |
72d0e1cb SG |
385 | return 0; |
386 | } | |
387 | ||
858377e4 | 388 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 389 | { |
428ad142 | 390 | int statret; |
72d0e1cb SG |
391 | struct stat statbuf; |
392 | bool ret = false; | |
72d0e1cb SG |
393 | |
394 | if (!c) | |
395 | return false; | |
396 | ||
5cee8c50 | 397 | if (container_mem_lock(c)) |
72d0e1cb | 398 | return false; |
428ad142 | 399 | |
72d0e1cb | 400 | if (!c->configfile) |
428ad142 CB |
401 | goto on_error; |
402 | ||
72d0e1cb SG |
403 | statret = stat(c->configfile, &statbuf); |
404 | if (statret != 0) | |
428ad142 CB |
405 | goto on_error; |
406 | ||
72d0e1cb SG |
407 | ret = true; |
408 | ||
428ad142 | 409 | on_error: |
5cee8c50 | 410 | container_mem_unlock(c); |
72d0e1cb SG |
411 | return ret; |
412 | } | |
413 | ||
858377e4 SH |
414 | #define WRAP_API(rettype, fnname) \ |
415 | static rettype fnname(struct lxc_container *c) \ | |
416 | { \ | |
417 | rettype ret; \ | |
8164f0e2 TA |
418 | bool reset_config = false; \ |
419 | \ | |
420 | if (!current_config && c && c->lxc_conf) { \ | |
421 | current_config = c->lxc_conf; \ | |
422 | reset_config = true; \ | |
423 | } \ | |
424 | \ | |
858377e4 | 425 | ret = do_##fnname(c); \ |
8164f0e2 TA |
426 | if (reset_config) \ |
427 | current_config = NULL; \ | |
428 | \ | |
858377e4 SH |
429 | return ret; \ |
430 | } | |
431 | ||
432 | #define WRAP_API_1(rettype, fnname, t1) \ | |
433 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
434 | { \ | |
435 | rettype ret; \ | |
8164f0e2 TA |
436 | bool reset_config = false; \ |
437 | \ | |
438 | if (!current_config && c && c->lxc_conf) { \ | |
439 | current_config = c->lxc_conf; \ | |
440 | reset_config = true; \ | |
441 | } \ | |
442 | \ | |
858377e4 | 443 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
444 | if (reset_config) \ |
445 | current_config = NULL; \ | |
446 | \ | |
858377e4 SH |
447 | return ret; \ |
448 | } | |
449 | ||
450 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
451 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
452 | { \ | |
453 | rettype ret; \ | |
8164f0e2 TA |
454 | bool reset_config = false; \ |
455 | \ | |
456 | if (!current_config && c && c->lxc_conf) { \ | |
457 | current_config = c->lxc_conf; \ | |
458 | reset_config = true; \ | |
459 | } \ | |
460 | \ | |
858377e4 | 461 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
462 | if (reset_config) \ |
463 | current_config = NULL; \ | |
464 | \ | |
858377e4 SH |
465 | return ret; \ |
466 | } | |
467 | ||
468 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
469 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
470 | { \ | |
471 | rettype ret; \ | |
8164f0e2 TA |
472 | bool reset_config = false; \ |
473 | \ | |
474 | if (!current_config && c && c->lxc_conf) { \ | |
475 | current_config = c->lxc_conf; \ | |
476 | reset_config = true; \ | |
477 | } \ | |
478 | \ | |
858377e4 | 479 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
480 | if (reset_config) \ |
481 | current_config = NULL; \ | |
482 | \ | |
858377e4 SH |
483 | return ret; \ |
484 | } | |
485 | ||
29df56cd LT |
486 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
487 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
488 | t4 a4, t5 a5, t6 a6) \ | |
489 | { \ | |
490 | rettype ret; \ | |
491 | bool reset_config = false; \ | |
492 | \ | |
493 | if (!current_config && c && c->lxc_conf) { \ | |
494 | current_config = c->lxc_conf; \ | |
495 | reset_config = true; \ | |
496 | } \ | |
497 | \ | |
498 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
499 | if (reset_config) \ | |
500 | current_config = NULL; \ | |
501 | \ | |
502 | return ret; \ | |
503 | } | |
504 | ||
858377e4 SH |
505 | WRAP_API(bool, lxcapi_is_defined) |
506 | ||
507 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 508 | { |
72d0e1cb SG |
509 | lxc_state_t s; |
510 | ||
511 | if (!c) | |
512 | return NULL; | |
b547d79f | 513 | |
13f5be62 | 514 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 515 | return lxc_state2str(s); |
72d0e1cb SG |
516 | } |
517 | ||
858377e4 SH |
518 | WRAP_API(const char *, lxcapi_state) |
519 | ||
39dc698c | 520 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
521 | { |
522 | lxc_state_t s; | |
5bddcb62 | 523 | |
13f5be62 | 524 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
525 | return (s == STOPPED); |
526 | } | |
527 | ||
858377e4 | 528 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 529 | { |
72d0e1cb SG |
530 | if (!c) |
531 | return false; | |
1b61062f | 532 | |
9e630418 | 533 | return !is_stopped(c); |
72d0e1cb SG |
534 | } |
535 | ||
858377e4 SH |
536 | WRAP_API(bool, lxcapi_is_running) |
537 | ||
538 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb | 539 | { |
2341916a | 540 | lxc_state_t s; |
8787b387 | 541 | |
02f71d7e | 542 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
543 | return false; |
544 | ||
2341916a | 545 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
546 | if (s != FROZEN) |
547 | return lxc_freeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8787b387 | 548 | |
72d0e1cb SG |
549 | return true; |
550 | } | |
551 | ||
858377e4 SH |
552 | WRAP_API(bool, lxcapi_freeze) |
553 | ||
554 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb | 555 | { |
2341916a | 556 | lxc_state_t s; |
8e59e0ba | 557 | |
02f71d7e | 558 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
559 | return false; |
560 | ||
2341916a | 561 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
562 | if (s == FROZEN) |
563 | return lxc_unfreeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8e59e0ba | 564 | |
72d0e1cb SG |
565 | return true; |
566 | } | |
567 | ||
858377e4 SH |
568 | WRAP_API(bool, lxcapi_unfreeze) |
569 | ||
570 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 571 | { |
0115f8fd DE |
572 | if (!c) |
573 | return -1; | |
574 | ||
c86e2584 | 575 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
576 | } |
577 | ||
858377e4 SH |
578 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
579 | ||
b5159817 DE |
580 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
581 | int stdoutfd, int stderrfd, int escape) | |
582 | { | |
858377e4 SH |
583 | int ret; |
584 | ||
585 | if (!c) | |
586 | return -1; | |
587 | ||
588 | current_config = c->lxc_conf; | |
589 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
590 | current_config = NULL; | |
49cfedb3 | 591 | |
858377e4 | 592 | return ret; |
b5159817 DE |
593 | } |
594 | ||
191d43cc CB |
595 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
596 | { | |
597 | int ret; | |
598 | ||
5106ecd0 | 599 | if (!c) |
600 | return -EINVAL; | |
601 | ||
191d43cc CB |
602 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); |
603 | if (ret < 0) { | |
604 | if (ret == -ENODATA) | |
63b74cda | 605 | NOTICE("The console log is empty"); |
191d43cc | 606 | else if (ret == -EFAULT) |
63b74cda CB |
607 | NOTICE("The container does not keep a console log"); |
608 | else if (ret == -ENOENT) | |
609 | NOTICE("The container does not keep a console log file"); | |
610 | else if (ret == -EIO) | |
611 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 612 | else |
63b74cda | 613 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
614 | } |
615 | ||
616 | return ret; | |
617 | } | |
618 | ||
619 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
620 | ||
858377e4 | 621 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 622 | { |
72d0e1cb SG |
623 | if (!c) |
624 | return -1; | |
625 | ||
5cee8c50 | 626 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
627 | } |
628 | ||
858377e4 SH |
629 | WRAP_API(pid_t, lxcapi_init_pid) |
630 | ||
12a50cc6 | 631 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
632 | { |
633 | if (!c->lxc_conf) | |
634 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 635 | |
6b0d5538 SH |
636 | if (!c->lxc_conf) |
637 | return false; | |
e3246ab9 | 638 | |
d08779d4 SH |
639 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
640 | return false; | |
e3246ab9 | 641 | |
c7b17051 | 642 | c->lxc_conf->name = c->name; |
d08779d4 | 643 | return true; |
8eb5694b SH |
644 | } |
645 | ||
858377e4 | 646 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 647 | { |
39dc698c | 648 | int lret; |
12a50cc6 | 649 | const char *fname; |
d03ab308 CB |
650 | bool need_disklock = false, ret = false; |
651 | ||
72d0e1cb SG |
652 | if (!c) |
653 | return false; | |
654 | ||
655 | fname = c->configfile; | |
a73846d8 | 656 | |
72d0e1cb SG |
657 | if (alt_file) |
658 | fname = alt_file; | |
a73846d8 | 659 | |
72d0e1cb SG |
660 | if (!fname) |
661 | return false; | |
d03ab308 CB |
662 | |
663 | /* If we're reading something other than the container's config, we only | |
664 | * need to lock the in-memory container. If loading the container's | |
665 | * config file, take the disk lock. | |
39dc698c SH |
666 | */ |
667 | if (strcmp(fname, c->configfile) == 0) | |
668 | need_disklock = true; | |
669 | ||
670 | if (need_disklock) | |
671 | lret = container_disk_lock(c); | |
672 | else | |
673 | lret = container_mem_lock(c); | |
674 | if (lret) | |
72d0e1cb | 675 | return false; |
39dc698c | 676 | |
8eb5694b | 677 | ret = load_config_locked(c, fname); |
39dc698c SH |
678 | |
679 | if (need_disklock) | |
680 | container_disk_unlock(c); | |
681 | else | |
682 | container_mem_unlock(c); | |
d03ab308 | 683 | |
72d0e1cb SG |
684 | return ret; |
685 | } | |
686 | ||
858377e4 SH |
687 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
688 | ||
689 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 690 | { |
497a2995 | 691 | if (!c || !c->lxc_conf) |
540f932a | 692 | return false; |
fb5999f6 CB |
693 | |
694 | if (container_mem_lock(c)) | |
540f932a | 695 | return false; |
fb5999f6 | 696 | |
a2739df5 | 697 | c->daemonize = state; |
d630991d | 698 | |
3bc449ed | 699 | container_mem_unlock(c); |
fb5999f6 | 700 | |
540f932a | 701 | return true; |
72d0e1cb SG |
702 | } |
703 | ||
858377e4 SH |
704 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
705 | ||
706 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
707 | { |
708 | if (!c || !c->lxc_conf) | |
49badbbe | 709 | return false; |
871ed23b CB |
710 | |
711 | if (container_mem_lock(c)) | |
49badbbe | 712 | return false; |
871ed23b | 713 | |
540f932a | 714 | c->lxc_conf->close_all_fds = state; |
d630991d | 715 | |
130a1888 | 716 | container_mem_unlock(c); |
871ed23b | 717 | |
49badbbe | 718 | return true; |
130a1888 ÇO |
719 | } |
720 | ||
858377e4 SH |
721 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
722 | ||
e202dfb8 CB |
723 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
724 | int timeout) | |
7a44c8b4 SG |
725 | { |
726 | int ret; | |
727 | ||
728 | if (!c) | |
729 | return false; | |
730 | ||
67e571de | 731 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
732 | return ret == 0; |
733 | } | |
734 | ||
858377e4 | 735 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 736 | |
2d834aa8 SH |
737 | static bool am_single_threaded(void) |
738 | { | |
2d834aa8 | 739 | DIR *dir; |
d630991d | 740 | struct dirent *direntp; |
6b0297e3 | 741 | int count = 0; |
2d834aa8 | 742 | |
2d834aa8 | 743 | dir = opendir("/proc/self/task"); |
6b0297e3 | 744 | if (!dir) |
2d834aa8 | 745 | return false; |
2d834aa8 | 746 | |
74f96976 | 747 | while ((direntp = readdir(dir))) { |
d630991d | 748 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
749 | continue; |
750 | ||
d630991d | 751 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 752 | continue; |
6b0297e3 | 753 | |
d630991d CB |
754 | count++; |
755 | if (count > 1) | |
2d834aa8 SH |
756 | break; |
757 | } | |
2d834aa8 | 758 | closedir(dir); |
6b0297e3 | 759 | |
2d834aa8 SH |
760 | return count == 1; |
761 | } | |
762 | ||
fd51a89b SH |
763 | static void push_arg(char ***argp, char *arg, int *nargs) |
764 | { | |
fd51a89b | 765 | char *copy; |
1452d3fe | 766 | char **argv; |
fd51a89b | 767 | |
d630991d | 768 | copy = must_copy_string(arg); |
1452d3fe | 769 | |
fd51a89b SH |
770 | do { |
771 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
772 | } while (!argv); | |
1452d3fe | 773 | |
fd51a89b SH |
774 | *argp = argv; |
775 | argv[*nargs] = copy; | |
776 | (*nargs)++; | |
777 | argv[*nargs] = NULL; | |
778 | } | |
779 | ||
780 | static char **split_init_cmd(const char *incmd) | |
781 | { | |
f5849fd7 CB |
782 | __do_free char *copy = NULL; |
783 | char *p; | |
fd51a89b | 784 | char **argv; |
75bd13ab | 785 | int nargs = 0; |
fd51a89b SH |
786 | |
787 | if (!incmd) | |
788 | return NULL; | |
789 | ||
f5849fd7 | 790 | copy = must_copy_string(incmd); |
fd51a89b SH |
791 | |
792 | do { | |
793 | argv = malloc(sizeof(char *)); | |
794 | } while (!argv); | |
75bd13ab | 795 | |
fd51a89b | 796 | argv[0] = NULL; |
f5849fd7 | 797 | lxc_iterate_parts (p, copy, " ") |
fd51a89b SH |
798 | push_arg(&argv, p, &nargs); |
799 | ||
800 | if (nargs == 0) { | |
801 | free(argv); | |
802 | return NULL; | |
803 | } | |
75bd13ab | 804 | |
fd51a89b SH |
805 | return argv; |
806 | } | |
807 | ||
808 | static void free_init_cmd(char **argv) | |
809 | { | |
810 | int i = 0; | |
811 | ||
812 | if (!argv) | |
813 | return; | |
702bf732 | 814 | |
fd51a89b SH |
815 | while (argv[i]) |
816 | free(argv[i++]); | |
702bf732 | 817 | |
fd51a89b SH |
818 | free(argv); |
819 | } | |
820 | ||
5e5576a4 CB |
821 | static int lxc_rcv_status(int state_socket) |
822 | { | |
a73846d8 | 823 | int ret; |
824 | int state = -1; | |
5e5576a4 | 825 | |
ee8377bd | 826 | again: |
a73846d8 | 827 | /* Receive container state. */ |
828 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
829 | if (ret <= 0) { | |
ee8377bd CB |
830 | if (errno != EINTR) |
831 | return -1; | |
a73846d8 | 832 | |
ee8377bd CB |
833 | TRACE("Caught EINTR; retrying"); |
834 | goto again; | |
835 | } | |
5e5576a4 | 836 | |
a73846d8 | 837 | return state; |
5e5576a4 CB |
838 | } |
839 | ||
840 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
841 | { | |
a73846d8 | 842 | int ret, state; |
5e5576a4 | 843 | |
a73846d8 | 844 | /* Close write end of the socket pair. */ |
845 | close(handler->state_socket_pair[1]); | |
846 | handler->state_socket_pair[1] = -1; | |
5e5576a4 | 847 | |
a73846d8 | 848 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 849 | |
a73846d8 | 850 | /* Close read end of the socket pair. */ |
851 | close(handler->state_socket_pair[0]); | |
852 | handler->state_socket_pair[0] = -1; | |
5e5576a4 | 853 | |
a73846d8 | 854 | /* The first child is going to fork() again and then exits. So we reap |
855 | * the first child here. | |
856 | */ | |
01c1b11e CB |
857 | ret = wait_for_pid(pid); |
858 | if (ret < 0) | |
a73846d8 | 859 | DEBUG("Failed waiting on first child %d", pid); |
01c1b11e | 860 | else |
a73846d8 | 861 | DEBUG("First child %d exited", pid); |
5e5576a4 | 862 | |
a73846d8 | 863 | if (state < 0) { |
864 | SYSERROR("Failed to receive the container state"); | |
865 | return false; | |
866 | } | |
5e5576a4 | 867 | |
a73846d8 | 868 | /* If we receive anything else then running we know that the container |
869 | * failed to start. | |
870 | */ | |
871 | if (state != RUNNING) { | |
872 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
873 | lxc_state2str(state)); | |
874 | return false; | |
875 | } | |
5e5576a4 | 876 | |
a73846d8 | 877 | TRACE("Container is in \"RUNNING\" state"); |
878 | return true; | |
5e5576a4 CB |
879 | } |
880 | ||
858377e4 | 881 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
882 | { |
883 | int ret; | |
aa460476 | 884 | struct lxc_handler *handler; |
72d0e1cb | 885 | struct lxc_conf *conf; |
72d0e1cb SG |
886 | char *default_args[] = { |
887 | "/sbin/init", | |
13aad0ae | 888 | NULL, |
72d0e1cb | 889 | }; |
fd51a89b | 890 | char **init_cmd = NULL; |
c1a3e547 | 891 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 892 | |
7cb19d44 | 893 | /* container does exist */ |
72d0e1cb SG |
894 | if (!c) |
895 | return false; | |
120146b9 | 896 | |
7cb19d44 CB |
897 | /* If anything fails before we set error_num, we want an error in there. |
898 | */ | |
120146b9 SG |
899 | c->error_num = 1; |
900 | ||
7cb19d44 | 901 | /* Container has not been setup. */ |
72d0e1cb SG |
902 | if (!c->lxc_conf) |
903 | return false; | |
904 | ||
c47eafec | 905 | ret = ongoing_create(c); |
9fbe07f6 RK |
906 | switch (ret) { |
907 | case LXC_CREATE_FAILED: | |
7cb19d44 | 908 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 909 | return false; |
9fbe07f6 | 910 | case LXC_CREATE_ONGOING: |
7cb19d44 | 911 | ERROR("Ongoing container creation detected"); |
3e625e2d | 912 | return false; |
9fbe07f6 | 913 | case LXC_CREATE_INCOMPLETE: |
7cb19d44 | 914 | ERROR("Failed to create container"); |
c47eafec CB |
915 | do_lxcapi_destroy(c); |
916 | return false; | |
3e625e2d SH |
917 | } |
918 | ||
5cee8c50 | 919 | if (container_mem_lock(c)) |
72d0e1cb | 920 | return false; |
d630991d | 921 | |
72d0e1cb | 922 | conf = c->lxc_conf; |
72d0e1cb | 923 | |
aa460476 | 924 | /* initialize handler */ |
9640c6a7 | 925 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 926 | |
dbc9832d | 927 | container_mem_unlock(c); |
aa460476 CB |
928 | if (!handler) |
929 | return false; | |
930 | ||
fa30091b CB |
931 | if (!argv) { |
932 | if (useinit && conf->execute_cmd) | |
933 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
934 | else | |
935 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
936 | } | |
fd51a89b | 937 | |
7cb19d44 | 938 | /* ... otherwise use default_args. */ |
fa30091b | 939 | if (!argv) { |
e1e76423 CB |
940 | if (useinit) { |
941 | ERROR("No valid init detected"); | |
942 | lxc_free_handler(handler); | |
fa30091b | 943 | return false; |
e1e76423 CB |
944 | } |
945 | argv = default_args; | |
fa30091b | 946 | } |
72d0e1cb | 947 | |
7cb19d44 CB |
948 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
949 | * here to protect the on disk container? We don't want to exclude | |
950 | * things like lxc_info while the container is running. | |
951 | */ | |
9640c6a7 | 952 | if (c->daemonize) { |
a6b6ad7b | 953 | bool started; |
0a4be28d | 954 | char title[2048]; |
c47eafec | 955 | pid_t pid; |
71454076 | 956 | |
c47eafec | 957 | pid = fork(); |
f2e07cb6 | 958 | if (pid < 0) { |
c47eafec | 959 | free_init_cmd(init_cmd); |
f2e07cb6 | 960 | lxc_free_handler(handler); |
72d0e1cb | 961 | return false; |
f2e07cb6 | 962 | } |
6eaac303 | 963 | |
7cb19d44 | 964 | /* first parent */ |
6eaac303 QH |
965 | if (pid != 0) { |
966 | /* Set to NULL because we don't want father unlink | |
967 | * the PID file, child will do the free and unlink. | |
968 | */ | |
969 | c->pidfile = NULL; | |
5e5576a4 | 970 | |
7cb19d44 CB |
971 | /* Wait for container to tell us whether it started |
972 | * successfully. | |
973 | */ | |
a6b6ad7b CB |
974 | started = wait_on_daemonized_start(handler, pid); |
975 | ||
976 | free_init_cmd(init_cmd); | |
977 | lxc_free_handler(handler); | |
978 | return started; | |
6eaac303 | 979 | } |
025ed0f3 | 980 | |
7cb19d44 CB |
981 | /* first child */ |
982 | ||
0a4be28d | 983 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
984 | * characters. All that it means is that the proctitle will be |
985 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
bafad468 CB |
986 | */ |
987 | ret = snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); | |
988 | if (ret > 0) { | |
989 | ret = setproctitle(title); | |
990 | if (ret < 0) | |
991 | INFO("Failed to set process title to %s", title); | |
992 | else | |
993 | INFO("Set process title to %s", title); | |
994 | } | |
0a4be28d | 995 | |
7cb19d44 CB |
996 | /* We fork() a second time to be reparented to init. Like |
997 | * POSIX's daemon() function we change to "/" and redirect | |
998 | * std{in,out,err} to /dev/null. | |
999 | */ | |
697fa639 SH |
1000 | pid = fork(); |
1001 | if (pid < 0) { | |
7cb19d44 | 1002 | SYSERROR("Failed to fork first child process"); |
d608fbda | 1003 | _exit(EXIT_FAILURE); |
697fa639 | 1004 | } |
a6b6ad7b | 1005 | |
7cb19d44 | 1006 | /* second parent */ |
a6b6ad7b CB |
1007 | if (pid != 0) { |
1008 | free_init_cmd(init_cmd); | |
1009 | lxc_free_handler(handler); | |
d608fbda | 1010 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
1011 | } |
1012 | ||
7cb19d44 CB |
1013 | /* second child */ |
1014 | ||
1015 | /* change to / directory */ | |
1016 | ret = chdir("/"); | |
1017 | if (ret < 0) { | |
1018 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 1019 | _exit(EXIT_FAILURE); |
c278cef2 | 1020 | } |
7cb19d44 | 1021 | |
c1a3e547 CB |
1022 | keepfds[0] = handler->conf->maincmd_fd; |
1023 | keepfds[1] = handler->state_socket_pair[0]; | |
1024 | keepfds[2] = handler->state_socket_pair[1]; | |
1025 | ret = lxc_check_inherited(conf, true, keepfds, | |
1026 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 1027 | if (ret < 0) |
d608fbda | 1028 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1029 | |
1030 | /* redirect std{in,out,err} to /dev/null */ | |
1031 | ret = null_stdfds(); | |
1032 | if (ret < 0) { | |
1033 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1034 | _exit(EXIT_FAILURE); |
69aeabac | 1035 | } |
7cb19d44 CB |
1036 | |
1037 | /* become session leader */ | |
1038 | ret = setsid(); | |
1039 | if (ret < 0) | |
0059379f | 1040 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
bafad468 CB |
1041 | } else if (!am_single_threaded()) { |
1042 | ERROR("Cannot start non-daemonized container when threaded"); | |
1043 | free_init_cmd(init_cmd); | |
1044 | lxc_free_handler(handler); | |
1045 | return false; | |
72d0e1cb SG |
1046 | } |
1047 | ||
bafad468 CB |
1048 | /* We need to write PID file after daemonize, so we always write the |
1049 | * right PID. | |
6eaac303 QH |
1050 | */ |
1051 | if (c->pidfile) { | |
a7547c5c | 1052 | int w; |
b07ea13d | 1053 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
7cea5905 | 1054 | |
b07ea13d | 1055 | w = snprintf(pidstr, sizeof(pidstr), "%d", lxc_raw_getpid()); |
979a0d93 | 1056 | if (w < 0 || (size_t)w >= sizeof(pidstr)) { |
c47eafec | 1057 | free_init_cmd(init_cmd); |
f2e07cb6 | 1058 | lxc_free_handler(handler); |
7cea5905 CB |
1059 | |
1060 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1061 | ||
9640c6a7 | 1062 | if (c->daemonize) |
d608fbda | 1063 | _exit(EXIT_FAILURE); |
7cea5905 | 1064 | |
6eaac303 QH |
1065 | return false; |
1066 | } | |
1067 | ||
7cea5905 CB |
1068 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1069 | if (ret < 0) { | |
c47eafec | 1070 | free_init_cmd(init_cmd); |
f2e07cb6 | 1071 | lxc_free_handler(handler); |
7cea5905 | 1072 | |
bafad468 | 1073 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); |
7cea5905 | 1074 | |
9640c6a7 | 1075 | if (c->daemonize) |
d608fbda | 1076 | _exit(EXIT_FAILURE); |
7cea5905 | 1077 | |
6eaac303 QH |
1078 | return false; |
1079 | } | |
6eaac303 QH |
1080 | } |
1081 | ||
80308d07 | 1082 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1083 | |
a8dfe4e0 WB |
1084 | /* Unshare the mount namespace if requested */ |
1085 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1086 | ret = unshare(CLONE_NEWNS); |
1087 | if (ret < 0) { | |
bafad468 | 1088 | SYSERROR("Failed to unshare mount namespace"); |
f2e07cb6 | 1089 | lxc_free_handler(handler); |
a6b6ad7b | 1090 | ret = 1; |
7cb19d44 | 1091 | goto on_error; |
a8dfe4e0 | 1092 | } |
7cb19d44 CB |
1093 | |
1094 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1095 | if (ret < 0) { | |
a8dfe4e0 | 1096 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1097 | lxc_free_handler(handler); |
a6b6ad7b | 1098 | ret = 1; |
7cb19d44 | 1099 | goto on_error; |
a8dfe4e0 WB |
1100 | } |
1101 | } | |
1102 | ||
8bee8851 | 1103 | reboot: |
80308d07 | 1104 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1105 | /* initialize handler */ |
9640c6a7 | 1106 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1107 | if (!handler) { |
1108 | ret = 1; | |
7cb19d44 | 1109 | goto on_error; |
a6b6ad7b | 1110 | } |
aa460476 CB |
1111 | } |
1112 | ||
c1a3e547 CB |
1113 | keepfds[0] = handler->conf->maincmd_fd; |
1114 | keepfds[1] = handler->state_socket_pair[0]; | |
1115 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1116 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1117 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1118 | if (ret < 0) { |
f2e07cb6 | 1119 | lxc_free_handler(handler); |
d2cf4c37 | 1120 | ret = 1; |
7cb19d44 | 1121 | goto on_error; |
d2cf4c37 SH |
1122 | } |
1123 | ||
9605460f | 1124 | if (useinit) |
9640c6a7 CB |
1125 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1126 | c->daemonize, &c->error_num); | |
9605460f | 1127 | else |
9640c6a7 CB |
1128 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1129 | c->daemonize, &c->error_num); | |
72d0e1cb | 1130 | |
80308d07 | 1131 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1132 | INFO("Container requested reboot"); |
80308d07 | 1133 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1134 | goto reboot; |
1135 | } | |
1136 | ||
7cb19d44 | 1137 | on_error: |
487d8008 QH |
1138 | if (c->pidfile) { |
1139 | unlink(c->pidfile); | |
1140 | free(c->pidfile); | |
1141 | c->pidfile = NULL; | |
1142 | } | |
fd51a89b SH |
1143 | free_init_cmd(init_cmd); |
1144 | ||
9640c6a7 | 1145 | if (c->daemonize && ret != 0) |
d608fbda | 1146 | _exit(EXIT_FAILURE); |
9640c6a7 | 1147 | else if (c->daemonize) |
d608fbda | 1148 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1149 | |
1150 | if (ret != 0) | |
1151 | return false; | |
1152 | ||
1153 | return true; | |
72d0e1cb SG |
1154 | } |
1155 | ||
0c14779f CB |
1156 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1157 | char *const argv[]) | |
858377e4 SH |
1158 | { |
1159 | bool ret; | |
0c14779f | 1160 | |
858377e4 SH |
1161 | current_config = c ? c->lxc_conf : NULL; |
1162 | ret = do_lxcapi_start(c, useinit, argv); | |
1163 | current_config = NULL; | |
0c14779f | 1164 | |
858377e4 SH |
1165 | return ret; |
1166 | } | |
1167 | ||
9f52e331 | 1168 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1169 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1170 | { | |
1171 | va_list ap; | |
a0e93eeb | 1172 | char **inargs = NULL; |
72d0e1cb SG |
1173 | bool bret = false; |
1174 | ||
1175 | /* container exists */ | |
1176 | if (!c) | |
1177 | return false; | |
1178 | ||
858377e4 SH |
1179 | current_config = c->lxc_conf; |
1180 | ||
72d0e1cb | 1181 | va_start(ap, useinit); |
a0e93eeb | 1182 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1183 | va_end(ap); |
9f52e331 CB |
1184 | if (!inargs) |
1185 | goto on_error; | |
72d0e1cb | 1186 | |
a0e93eeb | 1187 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1188 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1189 | |
9f52e331 | 1190 | on_error: |
72d0e1cb | 1191 | if (inargs) { |
4e03ae57 | 1192 | char **arg; |
a73846d8 | 1193 | |
4e03ae57 DE |
1194 | for (arg = inargs; *arg; arg++) |
1195 | free(*arg); | |
72d0e1cb SG |
1196 | free(inargs); |
1197 | } | |
1198 | ||
858377e4 | 1199 | current_config = NULL; |
9f52e331 | 1200 | |
72d0e1cb SG |
1201 | return bret; |
1202 | } | |
1203 | ||
858377e4 | 1204 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1205 | { |
1206 | int ret; | |
1207 | ||
1208 | if (!c) | |
1209 | return false; | |
1210 | ||
ef6e34ee | 1211 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1212 | |
d775f21b | 1213 | return ret == 0; |
72d0e1cb SG |
1214 | } |
1215 | ||
858377e4 SH |
1216 | WRAP_API(bool, lxcapi_stop) |
1217 | ||
d5752559 SH |
1218 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1219 | { | |
f5849fd7 | 1220 | __do_free char *p = NULL; |
78d44e5a | 1221 | int lasterr; |
78d44e5a CB |
1222 | int ret = -1; |
1223 | ||
d5752559 SH |
1224 | mode_t mask = umask(0002); |
1225 | ret = mkdir(path, 0770); | |
1226 | lasterr = errno; | |
1227 | umask(mask); | |
1228 | errno = lasterr; | |
1229 | if (ret) { | |
78d44e5a | 1230 | if (errno != EEXIST) |
d5752559 | 1231 | return -1; |
78d44e5a CB |
1232 | |
1233 | ret = 0; | |
d5752559 | 1234 | } |
78d44e5a | 1235 | |
f5849fd7 | 1236 | p = must_copy_string(path); |
cbb9c7c7 | 1237 | |
78d44e5a CB |
1238 | if (!lxc_list_empty(&conf->id_map)) { |
1239 | ret = chown_mapped_root(p, conf); | |
1240 | if (ret < 0) | |
1241 | ret = -1; | |
d5752559 | 1242 | } |
78d44e5a | 1243 | |
d5752559 SH |
1244 | return ret; |
1245 | } | |
1246 | ||
dfa7eaeb | 1247 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1248 | static bool create_container_dir(struct lxc_container *c) |
1249 | { | |
dfa7eaeb CB |
1250 | int ret; |
1251 | size_t len; | |
72d0e1cb | 1252 | char *s; |
72d0e1cb | 1253 | |
2a59a681 | 1254 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1255 | s = malloc(len); |
1256 | if (!s) | |
1257 | return false; | |
dfa7eaeb | 1258 | |
2a59a681 | 1259 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1260 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1261 | free(s); |
1262 | return false; | |
1263 | } | |
dfa7eaeb | 1264 | |
d5752559 | 1265 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1266 | free(s); |
dfa7eaeb | 1267 | |
72d0e1cb SG |
1268 | return ret == 0; |
1269 | } | |
1270 | ||
10bc1861 CB |
1271 | /* do_storage_create: thin wrapper around storage_create(). Like |
1272 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1273 | */ |
10bc1861 CB |
1274 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1275 | const char *type, | |
1276 | struct bdev_specs *specs) | |
1897e3bc | 1277 | { |
7a99b5a0 | 1278 | __do_free char *dest = NULL; |
e9e29a33 | 1279 | int ret; |
1897e3bc | 1280 | size_t len; |
10bc1861 | 1281 | struct lxc_storage *bdev; |
1897e3bc | 1282 | |
cd219ae6 | 1283 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1284 | if (c->lxc_conf->rootfs.path && |
1285 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1286 | const char *rpath = c->lxc_conf->rootfs.path; |
1287 | len = strlen(rpath) + 1; | |
f5849fd7 | 1288 | dest = must_realloc(NULL, len); |
cf465fe4 | 1289 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1290 | } else { |
858377e4 | 1291 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 | 1292 | len = strlen(c->name) + strlen(lxcpath) + 9; |
f5849fd7 | 1293 | dest = must_realloc(NULL, len); |
cd219ae6 SY |
1294 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); |
1295 | } | |
e9e29a33 | 1296 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1297 | return NULL; |
1298 | ||
10bc1861 | 1299 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1300 | if (!bdev) { |
e9e29a33 | 1301 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1302 | return NULL; |
d44e88c2 SH |
1303 | } |
1304 | ||
7a96a068 | 1305 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1306 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
8ea91347 | 1307 | storage_put(bdev); |
f7ac4459 CB |
1308 | return NULL; |
1309 | } | |
cf3ef16d | 1310 | |
e9e29a33 CB |
1311 | /* If we are not root, chown the rootfs dir to root in the target user |
1312 | * namespace. | |
f7ac4459 | 1313 | */ |
e9e29a33 CB |
1314 | ret = geteuid(); |
1315 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1316 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1317 | if (ret < 0) { | |
1318 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1319 | suggest_default_idmap(); |
10bc1861 | 1320 | storage_put(bdev); |
cf3ef16d SH |
1321 | return NULL; |
1322 | } | |
1323 | } | |
1324 | ||
1897e3bc SH |
1325 | return bdev; |
1326 | } | |
1327 | ||
85e02f56 PR |
1328 | /* Strip path and return name of file for argv[0] passed to execvp */ |
1329 | static char *lxctemplatefilename(char *tpath) | |
72d0e1cb | 1330 | { |
47e55887 CB |
1331 | char *p; |
1332 | ||
85e02f56 PR |
1333 | p = tpath + strlen(tpath) - 1; |
1334 | while ( (p-1) >= tpath && *(p-1) != '/') | |
96b3cb40 | 1335 | p--; |
47e55887 | 1336 | |
96b3cb40 SH |
1337 | return p; |
1338 | } | |
72d0e1cb | 1339 | |
47e55887 CB |
1340 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1341 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1342 | { |
47e55887 | 1343 | int ret; |
96b3cb40 | 1344 | pid_t pid; |
72d0e1cb | 1345 | |
72d0e1cb | 1346 | if (!tpath) |
96b3cb40 | 1347 | return true; |
72d0e1cb SG |
1348 | |
1349 | pid = fork(); | |
1350 | if (pid < 0) { | |
7e34710e | 1351 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1352 | return false; |
72d0e1cb SG |
1353 | } |
1354 | ||
1a0e70ac | 1355 | if (pid == 0) { /* child */ |
47e55887 CB |
1356 | int i, len; |
1357 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1358 | char **newargv; |
47e55887 CB |
1359 | int nargs = 0; |
1360 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1361 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1362 | uid_t euid; |
72d0e1cb | 1363 | |
47e55887 CB |
1364 | if (need_null_stdfds) { |
1365 | ret = null_stdfds(); | |
1366 | if (ret < 0) | |
1367 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1368 | } |
1897e3bc | 1369 | |
8a388ed4 | 1370 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1371 | if (!bdev) { |
47e55887 | 1372 | ERROR("Failed to initialize storage"); |
7e34710e | 1373 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1374 | } |
1375 | ||
47e55887 CB |
1376 | euid = geteuid(); |
1377 | if (euid == 0) { | |
1378 | ret = unshare(CLONE_NEWNS); | |
1379 | if (ret < 0) { | |
1380 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1381 | _exit(EXIT_FAILURE); |
cf3ef16d | 1382 | } |
47e55887 CB |
1383 | |
1384 | ret = detect_shared_rootfs(); | |
1385 | if (ret == 1) { | |
1386 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1387 | if (ret < 0) { | |
1388 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1389 | ERROR("Continuing..."); |
1390 | } | |
1391 | } | |
1392 | } | |
47e55887 CB |
1393 | |
1394 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1395 | if (euid != 0) { | |
1396 | ERROR("Unprivileged users can only create " | |
1397 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1398 | _exit(EXIT_FAILURE); |
4de2791f | 1399 | } |
241978fa | 1400 | |
47e55887 CB |
1401 | if (strcmp(bdev->type, "overlay") == 0 || |
1402 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1403 | /* If we create an overlay container we need to |
1404 | * rsync the contents into | |
1405 | * <container-path>/<container-name>/rootfs. | |
1406 | * However, the overlay mount function will | |
1407 | * mount will mount | |
1408 | * <container-path>/<container-name>/delta0 | |
1409 | * over | |
1410 | * <container-path>/<container-name>/rootfs | |
1411 | * which means we would rsync the rootfs into | |
1412 | * the delta directory. That doesn't make sense | |
1413 | * since the delta directory only exists to | |
1414 | * record the differences to | |
1415 | * <container-path>/<container-name>/rootfs. So | |
1416 | * let's simply bind-mount here and then rsync | |
1417 | * directly into | |
1418 | * <container-path>/<container-name>/rootfs. | |
1419 | */ | |
1420 | char *src; | |
1421 | ||
1422 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1423 | if (!src) { | |
1424 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1425 | _exit(EXIT_FAILURE); |
241978fa CB |
1426 | } |
1427 | ||
1428 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1429 | if (ret < 0) { | |
1430 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1431 | _exit(EXIT_FAILURE); |
241978fa CB |
1432 | } |
1433 | } else { | |
47e55887 CB |
1434 | ret = bdev->ops->mount(bdev); |
1435 | if (ret < 0) { | |
241978fa | 1436 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1437 | _exit(EXIT_FAILURE); |
241978fa | 1438 | } |
cf3ef16d | 1439 | } |
1a0e70ac | 1440 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1441 | const char *src; |
f10fad2f | 1442 | free(bdev->dest); |
e9705550 CB |
1443 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1444 | bdev->dest = strdup(src); | |
1897e3bc SH |
1445 | } |
1446 | ||
47e55887 CB |
1447 | /* Create our new array, pre-pend the template name and base |
1448 | * args. | |
72d0e1cb SG |
1449 | */ |
1450 | if (argv) | |
a73846d8 | 1451 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1452 | ; |
a73846d8 | 1453 | |
47e55887 CB |
1454 | /* template, path, rootfs and name args */ |
1455 | nargs += 4; | |
cf3ef16d | 1456 | |
72d0e1cb SG |
1457 | newargv = malloc(nargs * sizeof(*newargv)); |
1458 | if (!newargv) | |
7e34710e | 1459 | _exit(EXIT_FAILURE); |
85e02f56 | 1460 | newargv[0] = lxctemplatefilename(tpath); |
72d0e1cb | 1461 | |
47e55887 | 1462 | /* --path */ |
2a59a681 | 1463 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1464 | patharg = malloc(len); |
1465 | if (!patharg) | |
7e34710e | 1466 | _exit(EXIT_FAILURE); |
a73846d8 | 1467 | |
2a59a681 | 1468 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1469 | if (ret < 0 || ret >= len) |
7e34710e | 1470 | _exit(EXIT_FAILURE); |
72d0e1cb | 1471 | newargv[1] = patharg; |
47e55887 CB |
1472 | |
1473 | /* --name */ | |
72d0e1cb SG |
1474 | len = strlen("--name=") + strlen(c->name) + 1; |
1475 | namearg = malloc(len); | |
1476 | if (!namearg) | |
7e34710e | 1477 | _exit(EXIT_FAILURE); |
a73846d8 | 1478 | |
72d0e1cb SG |
1479 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1480 | if (ret < 0 || ret >= len) | |
7e34710e | 1481 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1482 | newargv[2] = namearg; |
1483 | ||
47e55887 | 1484 | /* --rootfs */ |
1897e3bc SH |
1485 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1486 | rootfsarg = malloc(len); | |
1487 | if (!rootfsarg) | |
7e34710e | 1488 | _exit(EXIT_FAILURE); |
a73846d8 | 1489 | |
1897e3bc SH |
1490 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1491 | if (ret < 0 || ret >= len) | |
7e34710e | 1492 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1493 | newargv[3] = rootfsarg; |
1494 | ||
72d0e1cb SG |
1495 | /* add passed-in args */ |
1496 | if (argv) | |
1897e3bc | 1497 | for (i = 4; i < nargs; i++) |
47e55887 | 1498 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1499 | |
1500 | /* add trailing NULL */ | |
1501 | nargs++; | |
1502 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1503 | if (!newargv) | |
7e34710e | 1504 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1505 | newargv[nargs - 1] = NULL; |
1506 | ||
47e55887 CB |
1507 | /* If we're running the template in a mapped userns, then we |
1508 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1509 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1510 | * the mapped uid for our geteuid() | |
cf3ef16d | 1511 | */ |
0e6e3a41 | 1512 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1513 | int extraargs, hostuid_mapped, hostgid_mapped; |
1514 | char **n2; | |
1515 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1516 | struct lxc_list *it; |
1517 | struct id_map *map; | |
47e55887 | 1518 | int n2args = 1; |
cf3ef16d | 1519 | |
47e55887 CB |
1520 | n2 = malloc(n2args * sizeof(*n2)); |
1521 | if (!n2) | |
7e34710e | 1522 | _exit(EXIT_FAILURE); |
47e55887 | 1523 | |
cf3ef16d SH |
1524 | newargv[0] = tpath; |
1525 | tpath = "lxc-usernsexec"; | |
1526 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1527 | |
cf3ef16d SH |
1528 | lxc_list_for_each(it, &conf->id_map) { |
1529 | map = it->elem; | |
1530 | n2args += 2; | |
57d116ab | 1531 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1532 | if (!n2) |
7e34710e | 1533 | _exit(EXIT_FAILURE); |
47e55887 CB |
1534 | |
1535 | n2[n2args - 2] = "-m"; | |
1536 | n2[n2args - 1] = malloc(200); | |
1537 | if (!n2[n2args - 1]) | |
7e34710e | 1538 | _exit(EXIT_FAILURE); |
47e55887 CB |
1539 | |
1540 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1541 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1542 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1543 | if (ret < 0 || ret >= 200) |
7e34710e | 1544 | _exit(EXIT_FAILURE); |
cf3ef16d | 1545 | } |
47e55887 CB |
1546 | |
1547 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1548 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1549 | |
57d116ab | 1550 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1551 | if (!n2) |
7e34710e | 1552 | _exit(EXIT_FAILURE); |
47e55887 CB |
1553 | |
1554 | if (hostuid_mapped < 0) { | |
1555 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1556 | n2[n2args++] = "-m"; |
47e55887 CB |
1557 | if (hostuid_mapped < 0) { |
1558 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1559 | _exit(EXIT_FAILURE); |
cf3ef16d | 1560 | } |
47e55887 | 1561 | |
cf3ef16d | 1562 | n2[n2args++] = malloc(200); |
47e55887 | 1563 | if (!n2[n2args - 1]) { |
cf3ef16d | 1564 | SYSERROR("out of memory"); |
7e34710e | 1565 | _exit(EXIT_FAILURE); |
cf3ef16d | 1566 | } |
a73846d8 | 1567 | |
47e55887 CB |
1568 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1569 | hostuid_mapped, geteuid()); | |
1570 | if (ret < 0 || ret >= 200) | |
7e34710e | 1571 | _exit(EXIT_FAILURE); |
cf3ef16d | 1572 | } |
47e55887 CB |
1573 | |
1574 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1575 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1576 | |
2133f58c SH |
1577 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1578 | if (!n2) | |
7e34710e | 1579 | _exit(EXIT_FAILURE); |
47e55887 | 1580 | |
2133f58c | 1581 | if (hostgid_mapped < 0) { |
339efad9 | 1582 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1583 | n2[n2args++] = "-m"; |
1584 | if (hostgid_mapped < 0) { | |
47e55887 | 1585 | ERROR("Failed to find free gid to map"); |
7e34710e | 1586 | _exit(EXIT_FAILURE); |
2133f58c | 1587 | } |
47e55887 | 1588 | |
2133f58c | 1589 | n2[n2args++] = malloc(200); |
47e55887 | 1590 | if (!n2[n2args - 1]) { |
2133f58c | 1591 | SYSERROR("out of memory"); |
7e34710e | 1592 | _exit(EXIT_FAILURE); |
2133f58c | 1593 | } |
47e55887 CB |
1594 | |
1595 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1596 | hostgid_mapped, getegid()); | |
1597 | if (ret < 0 || ret >= 200) | |
7e34710e | 1598 | _exit(EXIT_FAILURE); |
2133f58c | 1599 | } |
a73846d8 | 1600 | |
cf3ef16d | 1601 | n2[n2args++] = "--"; |
a73846d8 | 1602 | |
cf3ef16d SH |
1603 | for (i = 0; i < nargs; i++) |
1604 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1605 | n2args += nargs; |
47e55887 CB |
1606 | |
1607 | /* Finally add "--mapped-uid $uid" to tell template what | |
1608 | * to chown cached images to. | |
1a0e70ac | 1609 | */ |
2133f58c | 1610 | n2args += 4; |
57d116ab | 1611 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1612 | if (!n2) |
7e34710e | 1613 | _exit(EXIT_FAILURE); |
47e55887 | 1614 | |
1a0e70ac | 1615 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1616 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1617 | |
1618 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1619 | if (ret < 0 || ret >= 20) { | |
1620 | free(newargv); | |
1621 | free(n2); | |
1622 | _exit(EXIT_FAILURE); | |
1623 | } | |
1624 | ||
47e55887 CB |
1625 | n2[n2args - 4] = txtuid; |
1626 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1627 | |
1f080b1d CB |
1628 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1629 | if (ret < 0 || ret >= 20) { | |
1630 | free(newargv); | |
1631 | free(n2); | |
1632 | _exit(EXIT_FAILURE); | |
1633 | } | |
4250ef64 | 1634 | |
47e55887 CB |
1635 | n2[n2args - 2] = txtgid; |
1636 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1637 | free(newargv); |
1638 | newargv = n2; | |
1639 | } | |
47e55887 | 1640 | |
cf3ef16d | 1641 | execvp(tpath, newargv); |
e9705550 | 1642 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1643 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1644 | } |
1645 | ||
47e55887 CB |
1646 | ret = wait_for_pid(pid); |
1647 | if (ret != 0) { | |
1648 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1649 | return false; |
1650 | } | |
1651 | ||
1652 | return true; | |
1653 | } | |
1654 | ||
74a3920a | 1655 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1656 | { |
1fd9bd50 | 1657 | long flen; |
630ac7c6 | 1658 | size_t len; |
b4569e93 | 1659 | char *contents; |
3ce74686 | 1660 | FILE *f; |
025ed0f3 | 1661 | int ret = -1; |
fa2bb6ba SH |
1662 | #if HAVE_OPENSSL |
1663 | int i, md_len = 0; | |
1664 | unsigned char md_value[EVP_MAX_MD_SIZE]; | |
b4569e93 | 1665 | char *tpath; |
52026772 | 1666 | #endif |
3ce74686 | 1667 | |
025ed0f3 | 1668 | f = fopen(path, "r"); |
025ed0f3 | 1669 | if (f == NULL) |
3ce74686 | 1670 | return false; |
025ed0f3 | 1671 | |
630ac7c6 CB |
1672 | ret = fseek(f, 0, SEEK_END); |
1673 | if (ret < 0) | |
025ed0f3 | 1674 | goto out_error; |
630ac7c6 CB |
1675 | |
1676 | ret = -1; | |
1677 | flen = ftell(f); | |
1678 | if (flen < 0) | |
025ed0f3 | 1679 | goto out_error; |
630ac7c6 CB |
1680 | |
1681 | ret = fseek(f, 0, SEEK_SET); | |
1682 | if (ret < 0) | |
025ed0f3 | 1683 | goto out_error; |
630ac7c6 CB |
1684 | |
1685 | ret = fseek(f, 0, SEEK_SET); | |
1686 | if (ret < 0) | |
1687 | goto out_error; | |
1688 | ||
1689 | ret = -1; | |
1690 | contents = malloc(flen + 1); | |
1691 | if (!contents) | |
025ed0f3 | 1692 | goto out_error; |
630ac7c6 CB |
1693 | |
1694 | len = fread(contents, 1, flen, f); | |
1695 | if (len != flen) | |
025ed0f3 SH |
1696 | goto out_free_contents; |
1697 | ||
3ce74686 | 1698 | contents[flen] = '\0'; |
a73846d8 | 1699 | |
025ed0f3 | 1700 | ret = fclose(f); |
025ed0f3 SH |
1701 | f = NULL; |
1702 | if (ret < 0) | |
1703 | goto out_free_contents; | |
3ce74686 | 1704 | |
fa2bb6ba | 1705 | #if HAVE_OPENSSL |
01efd4d3 | 1706 | tpath = get_template_path(t); |
85db5535 | 1707 | if (!tpath) { |
630ac7c6 | 1708 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1709 | goto out_free_contents; |
3ce74686 SH |
1710 | } |
1711 | ||
fa2bb6ba | 1712 | ret = sha1sum_file(tpath, md_value, &md_len); |
85db5535 | 1713 | if (ret < 0) { |
630ac7c6 | 1714 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1715 | free(tpath); |
85db5535 | 1716 | goto out_free_contents; |
3ce74686 | 1717 | } |
cef701ed | 1718 | free(tpath); |
3ce74686 SH |
1719 | #endif |
1720 | ||
025ed0f3 | 1721 | f = fopen(path, "w"); |
025ed0f3 | 1722 | if (f == NULL) { |
630ac7c6 | 1723 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1724 | free(contents); |
1725 | return false; | |
1726 | } | |
630ac7c6 | 1727 | |
3ce74686 SH |
1728 | fprintf(f, "# Template used to create this container: %s\n", t); |
1729 | if (argv) { | |
1730 | fprintf(f, "# Parameters passed to the template:"); | |
1731 | while (*argv) { | |
1732 | fprintf(f, " %s", *argv); | |
1733 | argv++; | |
1734 | } | |
1735 | fprintf(f, "\n"); | |
1736 | } | |
a73846d8 | 1737 | |
fa2bb6ba | 1738 | #if HAVE_OPENSSL |
56698177 | 1739 | fprintf(f, "# Template script checksum (SHA-1): "); |
fa2bb6ba | 1740 | for (i=0; i<md_len; i++) |
56698177 SH |
1741 | fprintf(f, "%02x", md_value[i]); |
1742 | fprintf(f, "\n"); | |
3ce74686 | 1743 | #endif |
0520c252 | 1744 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1745 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1746 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1747 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1748 | if (fwrite(contents, 1, flen, f) != flen) { |
1749 | SYSERROR("Writing original contents"); | |
1750 | free(contents); | |
1751 | fclose(f); | |
1752 | return false; | |
1753 | } | |
630ac7c6 | 1754 | |
025ed0f3 | 1755 | ret = 0; |
630ac7c6 | 1756 | |
025ed0f3 | 1757 | out_free_contents: |
3ce74686 | 1758 | free(contents); |
630ac7c6 | 1759 | |
025ed0f3 SH |
1760 | out_error: |
1761 | if (f) { | |
1762 | int newret; | |
025ed0f3 | 1763 | newret = fclose(f); |
025ed0f3 SH |
1764 | if (ret == 0) |
1765 | ret = newret; | |
1766 | } | |
630ac7c6 | 1767 | |
025ed0f3 SH |
1768 | if (ret < 0) { |
1769 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1770 | return false; |
1771 | } | |
630ac7c6 | 1772 | |
3ce74686 SH |
1773 | return true; |
1774 | } | |
1775 | ||
4df7f012 SH |
1776 | static void lxcapi_clear_config(struct lxc_container *c) |
1777 | { | |
e62fd16f CB |
1778 | if (!c || !c->lxc_conf) |
1779 | return; | |
1780 | ||
1781 | lxc_conf_free(c->lxc_conf); | |
1782 | c->lxc_conf = NULL; | |
4df7f012 SH |
1783 | } |
1784 | ||
858377e4 SH |
1785 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1786 | ||
96b3cb40 SH |
1787 | /* |
1788 | * lxcapi_create: | |
1789 | * create a container with the given parameters. | |
1790 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1791 | * configuration already set | |
1792 | * @t: the template to execute to instantiate the root filesystem and | |
1793 | * adjust the configuration. | |
1794 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1795 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1796 | * use. | |
1797 | * | |
1798 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1799 | * arguments, you can just pass NULL. | |
1800 | */ | |
858377e4 | 1801 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1802 | const char *bdevtype, struct bdev_specs *specs, |
1803 | int flags, char *const argv[]) | |
96b3cb40 | 1804 | { |
e9e29a33 | 1805 | int partial_fd; |
51f0f73b | 1806 | mode_t mask; |
96b3cb40 | 1807 | pid_t pid; |
92fa4347 | 1808 | bool ret = false, rootfs_managed = true; |
85db5535 | 1809 | char *tpath = NULL; |
96b3cb40 SH |
1810 | |
1811 | if (!c) | |
1812 | return false; | |
1813 | ||
85db5535 DE |
1814 | if (t) { |
1815 | tpath = get_template_path(t); | |
1816 | if (!tpath) { | |
e9e29a33 | 1817 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1818 | goto out; |
1819 | } | |
96b3cb40 SH |
1820 | } |
1821 | ||
e9e29a33 CB |
1822 | /* If a template is passed in, and the rootfs already is defined in the |
1823 | * container config and exists, then the caller is trying to create an | |
1824 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1825 | */ |
858377e4 | 1826 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1827 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1828 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1829 | c->config_path); | |
6c6892b5 | 1830 | goto free_tpath; |
cf465fe4 SH |
1831 | } |
1832 | ||
6c6892b5 | 1833 | if (!c->lxc_conf) { |
858377e4 | 1834 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1835 | ERROR("Error loading default configuration file %s", |
1836 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1837 | goto free_tpath; |
1838 | } | |
96b3cb40 SH |
1839 | } |
1840 | ||
6c6892b5 DE |
1841 | if (!create_container_dir(c)) |
1842 | goto free_tpath; | |
1843 | ||
92fa4347 CB |
1844 | if (c->lxc_conf->rootfs.path) |
1845 | rootfs_managed = false; | |
1846 | ||
e9e29a33 CB |
1847 | /* If both template and rootfs.path are set, template is setup as |
1848 | * rootfs.path. The container is already created if we have a config and | |
1849 | * rootfs.path is accessible | |
0590e82c | 1850 | */ |
00370edd | 1851 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1852 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1853 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1854 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1855 | goto out; |
1856 | } | |
1857 | ret = true; | |
0590e82c | 1858 | goto out; |
00370edd | 1859 | } |
e9e29a33 CB |
1860 | |
1861 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1862 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1863 | goto out; |
e9e29a33 | 1864 | |
858377e4 | 1865 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1866 | /* Rootfs already existed, user just wanted to save the loaded |
1867 | * configuration. | |
1868 | */ | |
0f4cdd77 | 1869 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1870 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1871 | |
0590e82c SH |
1872 | ret = true; |
1873 | goto out; | |
a69aad27 | 1874 | } |
96b3cb40 SH |
1875 | |
1876 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1877 | partial_fd = create_partial(c); |
1878 | if (partial_fd < 0) | |
96b3cb40 SH |
1879 | goto out; |
1880 | ||
e9e29a33 | 1881 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1882 | |
51f0f73b KR |
1883 | mask = umask(0022); |
1884 | ||
e9e29a33 | 1885 | /* Create the storage. |
96b3cb40 SH |
1886 | * Note we can't do this in the same task as we use to execute the |
1887 | * template because of the way zfs works. | |
1888 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1889 | * namespace. | |
1890 | */ | |
1891 | pid = fork(); | |
1892 | if (pid < 0) { | |
e9e29a33 | 1893 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1894 | goto out_unlock; |
1895 | } | |
1896 | ||
1a0e70ac | 1897 | if (pid == 0) { /* child */ |
10bc1861 | 1898 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1899 | |
10bc1861 CB |
1900 | bdev = do_storage_create(c, bdevtype, specs); |
1901 | if (!bdev) { | |
e9e29a33 CB |
1902 | ERROR("Failed to create %s storage for %s", |
1903 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1904 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1905 | } |
1906 | ||
e9e29a33 | 1907 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1908 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1909 | ERROR("Failed to save initial config for %s", c->name); |
1910 | /* Parent task won't see the storage driver in the | |
1911 | * config so we delete it. | |
1912 | */ | |
96b3cb40 SH |
1913 | bdev->ops->umount(bdev); |
1914 | bdev->ops->destroy(bdev); | |
85aec4ac | 1915 | _exit(EXIT_FAILURE); |
96b3cb40 | 1916 | } |
a73846d8 | 1917 | |
85aec4ac | 1918 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1919 | } |
a73846d8 | 1920 | |
96b3cb40 | 1921 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1922 | goto out_unlock; |
96b3cb40 | 1923 | |
e9e29a33 | 1924 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1925 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1926 | c->lxc_conf = NULL; |
a73846d8 | 1927 | |
96b3cb40 | 1928 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1929 | goto out_unlock; |
96b3cb40 | 1930 | |
dc23c1c8 | 1931 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1932 | goto out_unlock; |
1933 | ||
1a0e70ac CB |
1934 | /* Now clear out the lxc_conf we have, reload from the created |
1935 | * container. | |
1936 | */ | |
858377e4 | 1937 | do_lxcapi_clear_config(c); |
3ce74686 | 1938 | |
9d65a487 KY |
1939 | if (t) { |
1940 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1941 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1942 | goto out_unlock; |
1943 | } | |
3ce74686 | 1944 | } |
a73846d8 | 1945 | |
a69aad27 | 1946 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1947 | |
1948 | out_unlock: | |
51f0f73b | 1949 | umask(mask); |
b20e0599 | 1950 | remove_partial(c, partial_fd); |
a73846d8 | 1951 | |
72d0e1cb | 1952 | out: |
92fa4347 CB |
1953 | if (!ret) { |
1954 | bool reset_managed = c->lxc_conf->rootfs.managed; | |
1955 | ||
1956 | /* | |
1957 | * Ensure that we don't destroy storage we didn't create | |
1958 | * ourselves. | |
1959 | */ | |
1960 | if (!rootfs_managed) | |
1961 | c->lxc_conf->rootfs.managed = false; | |
17a367d8 | 1962 | container_destroy(c, NULL); |
92fa4347 CB |
1963 | c->lxc_conf->rootfs.managed = reset_managed; |
1964 | } | |
a73846d8 | 1965 | |
6c6892b5 | 1966 | free_tpath: |
f10fad2f | 1967 | free(tpath); |
a69aad27 | 1968 | return ret; |
72d0e1cb SG |
1969 | } |
1970 | ||
858377e4 | 1971 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1972 | const char *bdevtype, struct bdev_specs *specs, |
1973 | int flags, char *const argv[]) | |
858377e4 SH |
1974 | { |
1975 | bool ret; | |
a73846d8 | 1976 | |
858377e4 | 1977 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1978 | |
858377e4 SH |
1979 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1980 | current_config = NULL; | |
1981 | return ret; | |
1982 | } | |
1983 | ||
1984 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1985 | { |
9dd54153 | 1986 | int ret; |
3e625e2d | 1987 | pid_t pid; |
dd267776 | 1988 | int rebootsignal = SIGINT; |
3e625e2d SH |
1989 | |
1990 | if (!c) | |
1991 | return false; | |
9dd54153 | 1992 | |
858377e4 | 1993 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1994 | return false; |
9dd54153 | 1995 | |
858377e4 | 1996 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1997 | if (pid <= 0) |
1998 | return false; | |
9dd54153 | 1999 | |
dd267776 BP |
2000 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
2001 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
2002 | |
2003 | ret = kill(pid, rebootsignal); | |
2004 | if (ret < 0) { | |
2005 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 2006 | return false; |
591614a7 | 2007 | } |
3e625e2d | 2008 | |
9dd54153 | 2009 | return true; |
3e625e2d SH |
2010 | } |
2011 | ||
858377e4 SH |
2012 | WRAP_API(bool, lxcapi_reboot) |
2013 | ||
d39b10eb CB |
2014 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
2015 | { | |
2016 | int killret, ret; | |
2017 | pid_t pid; | |
2018 | int rebootsignal = SIGINT, state_client_fd = -1; | |
2019 | lxc_state_t states[MAX_STATE] = {0}; | |
2020 | ||
2021 | if (!c) | |
2022 | return false; | |
2023 | ||
2024 | if (!do_lxcapi_is_running(c)) | |
2025 | return true; | |
2026 | ||
2027 | pid = do_lxcapi_init_pid(c); | |
2028 | if (pid <= 0) | |
2029 | return true; | |
2030 | ||
2031 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2032 | rebootsignal = c->lxc_conf->rebootsignal; | |
2033 | ||
2034 | /* Add a new state client before sending the shutdown signal so that we | |
2035 | * don't miss a state. | |
2036 | */ | |
2037 | if (timeout != 0) { | |
2038 | states[RUNNING] = 2; | |
2039 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2040 | &state_client_fd); | |
2041 | if (ret < 0) | |
2042 | return false; | |
2043 | ||
2044 | if (state_client_fd < 0) | |
2045 | return false; | |
2046 | ||
2047 | if (ret == RUNNING) | |
2048 | return true; | |
2049 | ||
2050 | if (ret < MAX_STATE) | |
2051 | return false; | |
2052 | } | |
2053 | ||
2054 | /* Send reboot signal to container. */ | |
2055 | killret = kill(pid, rebootsignal); | |
2056 | if (killret < 0) { | |
d39b10eb CB |
2057 | if (state_client_fd >= 0) |
2058 | close(state_client_fd); | |
a73846d8 | 2059 | |
9dd54153 | 2060 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2061 | return false; |
2062 | } | |
2063 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2064 | ||
a579fa51 | 2065 | if (timeout == 0) |
d39b10eb CB |
2066 | return true; |
2067 | ||
2068 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2069 | close(state_client_fd); | |
2070 | if (ret < 0) | |
2071 | return false; | |
2072 | ||
2073 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2074 | if (ret != RUNNING) | |
2075 | return false; | |
2076 | ||
2077 | return true; | |
2078 | } | |
2079 | ||
2080 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2081 | ||
858377e4 | 2082 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2083 | { |
f8bdb6dc | 2084 | int killret, ret; |
72d0e1cb | 2085 | pid_t pid; |
9dd54153 | 2086 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2087 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2088 | |
2089 | if (!c) | |
2090 | return false; | |
2091 | ||
858377e4 | 2092 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2093 | return true; |
f8bdb6dc | 2094 | |
858377e4 | 2095 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2096 | if (pid <= 0) |
2097 | return true; | |
330ae3d3 CB |
2098 | |
2099 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2100 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2101 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2102 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2103 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2104 | |
92e35018 CB |
2105 | /* Add a new state client before sending the shutdown signal so that we |
2106 | * don't miss a state. | |
2107 | */ | |
f8bdb6dc CB |
2108 | if (timeout != 0) { |
2109 | states[STOPPED] = 1; | |
2110 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2111 | &state_client_fd); | |
2112 | if (ret < 0) | |
2113 | return false; | |
92e35018 | 2114 | |
f8bdb6dc CB |
2115 | if (state_client_fd < 0) |
2116 | return false; | |
2117 | ||
2118 | if (ret == STOPPED) | |
2119 | return true; | |
591614a7 | 2120 | |
f8bdb6dc | 2121 | if (ret < MAX_STATE) |
92e35018 | 2122 | return false; |
92e35018 CB |
2123 | } |
2124 | ||
f8bdb6dc CB |
2125 | /* Send shutdown signal to container. */ |
2126 | killret = kill(pid, haltsignal); | |
2127 | if (killret < 0) { | |
f8bdb6dc CB |
2128 | if (state_client_fd >= 0) |
2129 | close(state_client_fd); | |
a73846d8 | 2130 | |
9dd54153 | 2131 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2132 | return false; |
2133 | } | |
2134 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2135 | ||
923929f6 | 2136 | if (timeout == 0) |
f8bdb6dc CB |
2137 | return true; |
2138 | ||
2139 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2140 | close(state_client_fd); | |
2141 | if (ret < 0) | |
2142 | return false; | |
2143 | ||
2144 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2145 | if (ret != STOPPED) | |
2146 | return false; | |
2147 | ||
2148 | return true; | |
72d0e1cb SG |
2149 | } |
2150 | ||
858377e4 SH |
2151 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2152 | ||
1897e3bc | 2153 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2154 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2155 | { |
2156 | bool bret = false; | |
a0e93eeb | 2157 | char **args = NULL; |
72d0e1cb | 2158 | va_list ap; |
72d0e1cb SG |
2159 | |
2160 | if (!c) | |
2161 | return false; | |
2162 | ||
858377e4 SH |
2163 | current_config = c->lxc_conf; |
2164 | ||
72d0e1cb SG |
2165 | /* |
2166 | * since we're going to wait for create to finish, I don't think we | |
2167 | * need to get a copy of the arguments. | |
2168 | */ | |
dc23c1c8 | 2169 | va_start(ap, flags); |
a0e93eeb | 2170 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2171 | va_end(ap); |
a0e93eeb | 2172 | if (!args) { |
e9e29a33 | 2173 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2174 | goto out; |
2175 | } | |
72d0e1cb | 2176 | |
858377e4 | 2177 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2178 | |
2179 | out: | |
a0e93eeb | 2180 | free(args); |
858377e4 | 2181 | current_config = NULL; |
72d0e1cb SG |
2182 | return bret; |
2183 | } | |
2184 | ||
6b0d5538 SH |
2185 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2186 | { | |
4222a9f4 CB |
2187 | if (!strcmp(key, "lxc.cgroup")) |
2188 | return clear_unexp_config_line(conf, key, true); | |
2189 | ||
2190 | if (!strcmp(key, "lxc.network")) | |
2191 | return clear_unexp_config_line(conf, key, true); | |
2192 | ||
2193 | if (!strcmp(key, "lxc.net")) | |
2194 | return clear_unexp_config_line(conf, key, true); | |
2195 | ||
2196 | /* Clear a network with a specific index. */ | |
2197 | if (!strncmp(key, "lxc.net.", 8)) { | |
2198 | int ret; | |
2199 | const char *idx; | |
2200 | ||
2201 | idx = key + 8; | |
2202 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2203 | if (!ret) | |
2204 | return clear_unexp_config_line(conf, key, true); | |
2205 | } | |
2206 | ||
2207 | if (!strcmp(key, "lxc.hook")) | |
2208 | return clear_unexp_config_line(conf, key, true); | |
2209 | ||
2210 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2211 | } |
2212 | ||
6afd673f CB |
2213 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2214 | const char *key) | |
72d0e1cb | 2215 | { |
6afd673f CB |
2216 | int ret = 1; |
2217 | struct lxc_config_t *config; | |
72d0e1cb SG |
2218 | |
2219 | if (!c || !c->lxc_conf) | |
2220 | return false; | |
6afd673f | 2221 | |
5cee8c50 | 2222 | if (container_mem_lock(c)) |
72d0e1cb | 2223 | return false; |
6afd673f | 2224 | |
300df83e | 2225 | config = lxc_get_config(key); |
6afd673f CB |
2226 | /* Verify that the config key exists and that it has a callback |
2227 | * implemented. | |
2228 | */ | |
2229 | if (config && config->clr) | |
26471403 | 2230 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2231 | |
6b0d5538 SH |
2232 | if (!ret) |
2233 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2234 | |
5cee8c50 | 2235 | container_mem_unlock(c); |
72d0e1cb SG |
2236 | return ret == 0; |
2237 | } | |
2238 | ||
858377e4 SH |
2239 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2240 | ||
e0f59189 | 2241 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2242 | { |
858377e4 | 2243 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2244 | |
caab004f TA |
2245 | if (pid < 0) |
2246 | return false; | |
2247 | ||
a73846d8 | 2248 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2249 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2250 | if (!switch_to_ns(pid, "user")) |
2251 | return false; | |
a73846d8 | 2252 | |
51d0854c | 2253 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2254 | } |
2255 | ||
1a0e70ac | 2256 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2257 | static inline int string_cmp(char **first, char **second) |
2258 | { | |
2259 | return strcmp(*first, *second); | |
2260 | } | |
2261 | ||
1a0e70ac CB |
2262 | /* Used by qsort and bsearch functions for comparing container names. */ |
2263 | static inline int container_cmp(struct lxc_container **first, | |
2264 | struct lxc_container **second) | |
9c88ff1f ÇO |
2265 | { |
2266 | return strcmp((*first)->name, (*second)->name); | |
2267 | } | |
2268 | ||
2269 | static bool add_to_array(char ***names, char *cname, int pos) | |
2270 | { | |
2271 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2272 | if (!newnames) { | |
2273 | ERROR("Out of memory"); | |
2274 | return false; | |
2275 | } | |
2276 | ||
2277 | *names = newnames; | |
2278 | newnames[pos] = strdup(cname); | |
2279 | if (!newnames[pos]) | |
2280 | return false; | |
2281 | ||
3b034c39 | 2282 | /* Sort the array as we will use binary search on it. */ |
1a0e70ac CB |
2283 | qsort(newnames, pos + 1, sizeof(char *), |
2284 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2285 | |
2286 | return true; | |
2287 | } | |
2288 | ||
1a0e70ac CB |
2289 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2290 | int pos, bool sort) | |
9c88ff1f | 2291 | { |
1a0e70ac | 2292 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2293 | if (!newlist) { |
2294 | ERROR("Out of memory"); | |
2295 | return false; | |
2296 | } | |
2297 | ||
2298 | *list = newlist; | |
2299 | newlist[pos] = c; | |
2300 | ||
3b034c39 | 2301 | /* Sort the array as we will use binary search on it. */ |
2871830a | 2302 | if (sort) |
1a0e70ac CB |
2303 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2304 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2305 | |
2306 | return true; | |
2307 | } | |
2308 | ||
2309 | static char** get_from_array(char ***names, char *cname, int size) | |
2310 | { | |
2311 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2312 | } | |
2313 | ||
a73846d8 | 2314 | static bool array_contains(char ***names, char *cname, int size) |
2315 | { | |
9c88ff1f ÇO |
2316 | if(get_from_array(names, cname, size) != NULL) |
2317 | return true; | |
a73846d8 | 2318 | |
9c88ff1f ÇO |
2319 | return false; |
2320 | } | |
2321 | ||
2322 | static bool remove_from_array(char ***names, char *cname, int size) | |
2323 | { | |
2324 | char **result = get_from_array(names, cname, size); | |
2325 | if (result != NULL) { | |
2326 | free(result); | |
2327 | return true; | |
2328 | } | |
a73846d8 | 2329 | |
9c88ff1f ÇO |
2330 | return false; |
2331 | } | |
2332 | ||
9f4866a6 | 2333 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2334 | { |
ae22a220 ÇO |
2335 | pid_t pid; |
2336 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2337 | char **interfaces = NULL; |
ae22a220 | 2338 | char interface[IFNAMSIZ]; |
799f29ab | 2339 | |
0ac84f04 | 2340 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2341 | return NULL; |
c868b261 | 2342 | |
ae22a220 ÇO |
2343 | pid = fork(); |
2344 | if (pid < 0) { | |
9f4866a6 | 2345 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2346 | close(pipefd[0]); |
2347 | close(pipefd[1]); | |
2348 | return NULL; | |
2349 | } | |
799f29ab | 2350 | |
1a0e70ac | 2351 | if (pid == 0) { /* child */ |
ae22a220 | 2352 | int ret = 1, nbytes; |
b1e44ed1 | 2353 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
ae22a220 ÇO |
2354 | |
2355 | /* close the read-end of the pipe */ | |
2356 | close(pipefd[0]); | |
2357 | ||
e0f59189 | 2358 | if (!enter_net_ns(c)) { |
9f4866a6 | 2359 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2360 | goto out; |
2361 | } | |
2362 | ||
2363 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2364 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
9f4866a6 | 2365 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2366 | goto out; |
2367 | } | |
2368 | ||
2369 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2370 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2371 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2372 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2373 | if (nbytes < 0) |
ae22a220 | 2374 | goto out; |
9f4866a6 | 2375 | |
ae22a220 ÇO |
2376 | count++; |
2377 | } | |
a73846d8 | 2378 | |
ae22a220 ÇO |
2379 | ret = 0; |
2380 | ||
2381 | out: | |
2382 | if (interfaceArray) | |
b1e44ed1 | 2383 | netns_freeifaddrs(interfaceArray); |
ae22a220 ÇO |
2384 | |
2385 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2386 | close(pipefd[1]); | |
02c611b0 | 2387 | _exit(ret); |
799f29ab ÇO |
2388 | } |
2389 | ||
ae22a220 ÇO |
2390 | /* close the write-end of the pipe */ |
2391 | close(pipefd[1]); | |
2392 | ||
3e1e9db8 | 2393 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2394 | interface[IFNAMSIZ - 1] = '\0'; |
2395 | ||
ae22a220 | 2396 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2397 | continue; |
799f29ab | 2398 | |
9f4866a6 | 2399 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2400 | ERROR("Failed to add \"%s\" to array", interface); |
2401 | ||
9c88ff1f ÇO |
2402 | count++; |
2403 | } | |
799f29ab | 2404 | |
ae22a220 | 2405 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2406 | for (i = 0; i < count; i++) |
ae22a220 | 2407 | free(interfaces[i]); |
a73846d8 | 2408 | |
ae22a220 ÇO |
2409 | free(interfaces); |
2410 | interfaces = NULL; | |
2411 | } | |
9c88ff1f | 2412 | |
ae22a220 ÇO |
2413 | /* close the read-end of the pipe */ |
2414 | close(pipefd[0]); | |
799f29ab | 2415 | |
9c88ff1f | 2416 | /* Append NULL to the array */ |
9f4866a6 | 2417 | if (interfaces) |
9c88ff1f | 2418 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2419 | |
9c88ff1f | 2420 | return interfaces; |
799f29ab ÇO |
2421 | } |
2422 | ||
858377e4 SH |
2423 | WRAP_API(char **, lxcapi_get_interfaces) |
2424 | ||
02a0e184 CB |
2425 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2426 | const char *family, int scope) | |
799f29ab | 2427 | { |
02a0e184 | 2428 | int i, ret; |
ae22a220 | 2429 | pid_t pid; |
02a0e184 | 2430 | int pipefd[2]; |
ae22a220 | 2431 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2432 | int count = 0; |
2433 | char **addresses = NULL; | |
799f29ab | 2434 | |
0ac84f04 | 2435 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2436 | if (ret < 0) { |
2437 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2438 | return NULL; |
c868b261 ÇO |
2439 | } |
2440 | ||
ae22a220 ÇO |
2441 | pid = fork(); |
2442 | if (pid < 0) { | |
02a0e184 | 2443 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2444 | close(pipefd[0]); |
2445 | close(pipefd[1]); | |
2446 | return NULL; | |
9c83a661 SG |
2447 | } |
2448 | ||
02a0e184 CB |
2449 | if (pid == 0) { |
2450 | ssize_t nbytes; | |
ae22a220 | 2451 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
a7547c5c | 2452 | char *address_ptr = NULL; |
02a0e184 | 2453 | void *tempAddrPtr = NULL; |
b1e44ed1 | 2454 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
fe218ca3 | 2455 | |
ae22a220 ÇO |
2456 | /* close the read-end of the pipe */ |
2457 | close(pipefd[0]); | |
2458 | ||
e0f59189 | 2459 | if (!enter_net_ns(c)) { |
02a0e184 | 2460 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2461 | goto out; |
9c83a661 | 2462 | } |
ae22a220 ÇO |
2463 | |
2464 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2465 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
02a0e184 | 2466 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2467 | goto out; |
2468 | } | |
2469 | ||
2470 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2471 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2472 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2473 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2474 | continue; |
2475 | ||
6ce39620 CB |
2476 | #pragma GCC diagnostic push |
2477 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2478 | ||
02a0e184 | 2479 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2480 | if (family && strcmp(family, "inet")) |
2481 | continue; | |
02a0e184 | 2482 | |
ae22a220 | 2483 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2484 | } else { |
ae22a220 ÇO |
2485 | if (family && strcmp(family, "inet6")) |
2486 | continue; | |
2487 | ||
2488 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2489 | continue; | |
2490 | ||
2491 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2492 | } | |
2493 | ||
6ce39620 CB |
2494 | #pragma GCC diagnostic pop |
2495 | ||
ae22a220 ÇO |
2496 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) |
2497 | continue; | |
2498 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2499 | continue; |
2500 | ||
a7547c5c | 2501 | address_ptr = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2502 | tempAddrPtr, addressOutputBuffer, |
2503 | sizeof(addressOutputBuffer)); | |
a7547c5c | 2504 | if (!address_ptr) |
02a0e184 | 2505 | continue; |
ae22a220 | 2506 | |
a7547c5c | 2507 | nbytes = lxc_write_nointr(pipefd[1], address_ptr, INET6_ADDRSTRLEN); |
02a0e184 CB |
2508 | if (nbytes != INET6_ADDRSTRLEN) { |
2509 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
a7547c5c | 2510 | address_ptr); |
ae22a220 ÇO |
2511 | goto out; |
2512 | } | |
a73846d8 | 2513 | |
ae22a220 | 2514 | count++; |
9c83a661 | 2515 | } |
a73846d8 | 2516 | |
ae22a220 | 2517 | ret = 0; |
9c83a661 | 2518 | |
ae22a220 | 2519 | out: |
02a0e184 | 2520 | if (interfaceArray) |
b1e44ed1 | 2521 | netns_freeifaddrs(interfaceArray); |
9c83a661 | 2522 | |
ae22a220 ÇO |
2523 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2524 | close(pipefd[1]); | |
fe1ce58c | 2525 | _exit(ret); |
6849cb5b | 2526 | } |
9c83a661 | 2527 | |
ae22a220 ÇO |
2528 | /* close the write-end of the pipe */ |
2529 | close(pipefd[1]); | |
2530 | ||
02a0e184 CB |
2531 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2532 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2533 | ||
2534 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2535 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2536 | |
9c88ff1f | 2537 | count++; |
9c83a661 SG |
2538 | } |
2539 | ||
ae22a220 | 2540 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2541 | for (i = 0; i < count; i++) |
ae22a220 | 2542 | free(addresses[i]); |
02a0e184 | 2543 | |
ae22a220 ÇO |
2544 | free(addresses); |
2545 | addresses = NULL; | |
2546 | } | |
9c83a661 | 2547 | |
ae22a220 ÇO |
2548 | /* close the read-end of the pipe */ |
2549 | close(pipefd[0]); | |
9c83a661 SG |
2550 | |
2551 | /* Append NULL to the array */ | |
02a0e184 | 2552 | if (addresses) |
9c88ff1f | 2553 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2554 | |
2555 | return addresses; | |
2556 | } | |
2557 | ||
858377e4 SH |
2558 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2559 | ||
2560 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2561 | { |
fce687aa CB |
2562 | int ret = -1; |
2563 | struct lxc_config_t *config; | |
72d0e1cb SG |
2564 | |
2565 | if (!c || !c->lxc_conf) | |
2566 | return -1; | |
fce687aa | 2567 | |
5cee8c50 | 2568 | if (container_mem_lock(c)) |
72d0e1cb | 2569 | return -1; |
fce687aa | 2570 | |
300df83e | 2571 | config = lxc_get_config(key); |
fce687aa CB |
2572 | /* Verify that the config key exists and that it has a callback |
2573 | * implemented. | |
2574 | */ | |
2575 | if (config && config->get) | |
cccd2219 | 2576 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2577 | |
5cee8c50 | 2578 | container_mem_unlock(c); |
72d0e1cb SG |
2579 | return ret; |
2580 | } | |
2581 | ||
858377e4 SH |
2582 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2583 | ||
2584 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2585 | { |
2586 | char *ret; | |
2587 | ||
2588 | if (!c || !c->lxc_conf) | |
2589 | return NULL; | |
a73846d8 | 2590 | |
8ac18377 ÇO |
2591 | if (container_mem_lock(c)) |
2592 | return NULL; | |
a73846d8 | 2593 | |
858377e4 | 2594 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2595 | container_mem_unlock(c); |
2596 | return ret; | |
2597 | } | |
2598 | ||
858377e4 SH |
2599 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2600 | ||
2601 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2602 | { |
300df83e CB |
2603 | int ret = -1; |
2604 | ||
2605 | /* List all config items. */ | |
72d0e1cb | 2606 | if (!key) |
cfc67626 | 2607 | return lxc_list_config_items(retv, inlen); |
300df83e | 2608 | |
72d0e1cb SG |
2609 | if (!c || !c->lxc_conf) |
2610 | return -1; | |
300df83e | 2611 | |
5cee8c50 | 2612 | if (container_mem_lock(c)) |
72d0e1cb | 2613 | return -1; |
300df83e CB |
2614 | |
2615 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2616 | * This is an intelligent result to show which keys are valid given the | |
2617 | * type of nic it is. | |
2618 | */ | |
6fba98b5 | 2619 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2620 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2621 | else |
2622 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2623 | |
5cee8c50 | 2624 | container_mem_unlock(c); |
72d0e1cb SG |
2625 | return ret; |
2626 | } | |
2627 | ||
858377e4 SH |
2628 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2629 | ||
2630 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2631 | { |
0e1a60b0 | 2632 | int fd, lret; |
39dc698c | 2633 | bool ret = false, need_disklock = false; |
39dc698c | 2634 | |
72d0e1cb SG |
2635 | if (!alt_file) |
2636 | alt_file = c->configfile; | |
a73846d8 | 2637 | |
72d0e1cb | 2638 | if (!alt_file) |
1a0e70ac | 2639 | return false; |
39dc698c | 2640 | |
1a0e70ac | 2641 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2642 | if (!c->lxc_conf) { |
858377e4 | 2643 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2644 | ERROR("Error loading default configuration file %s " |
2645 | "while saving %s", | |
2646 | lxc_global_config_value("lxc.default_config"), | |
2647 | c->name); | |
72d0e1cb SG |
2648 | return false; |
2649 | } | |
39dc698c | 2650 | } |
72d0e1cb | 2651 | |
5a3d2e1e SG |
2652 | if (!create_container_dir(c)) |
2653 | return false; | |
2654 | ||
1a0e70ac CB |
2655 | /* If we're writing to the container's config file, take the disk lock. |
2656 | * Otherwise just take the memlock to protect the struct lxc_container | |
2657 | * while we're traversing it. | |
39dc698c SH |
2658 | */ |
2659 | if (strcmp(c->configfile, alt_file) == 0) | |
2660 | need_disklock = true; | |
2661 | ||
2662 | if (need_disklock) | |
2663 | lret = container_disk_lock(c); | |
2664 | else | |
2665 | lret = container_mem_lock(c); | |
39dc698c | 2666 | if (lret) |
72d0e1cb | 2667 | return false; |
39dc698c | 2668 | |
10034af5 | 2669 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2670 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2671 | if (fd < 0) |
2672 | goto on_error; | |
2673 | ||
2674 | lret = write_config(fd, c->lxc_conf); | |
2675 | close(fd); | |
2676 | if (lret < 0) | |
2677 | goto on_error; | |
2678 | ||
39dc698c SH |
2679 | ret = true; |
2680 | ||
0e1a60b0 | 2681 | on_error: |
39dc698c SH |
2682 | if (need_disklock) |
2683 | container_disk_unlock(c); | |
2684 | else | |
2685 | container_mem_unlock(c); | |
0e1a60b0 | 2686 | |
39dc698c | 2687 | return ret; |
72d0e1cb SG |
2688 | } |
2689 | ||
858377e4 SH |
2690 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2691 | ||
0ea055b3 CB |
2692 | |
2693 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2694 | { |
0ea055b3 CB |
2695 | FILE *f1; |
2696 | struct stat fbuf; | |
42342bed CB |
2697 | void *buf = NULL; |
2698 | char *del = NULL; | |
8a22c168 CB |
2699 | char path[PATH_MAX]; |
2700 | char newpath[PATH_MAX]; | |
0ea055b3 | 2701 | int fd, ret, n = 0, v = 0; |
dfb31b25 | 2702 | bool bret = false; |
42342bed | 2703 | size_t len = 0, bytes = 0; |
dfb31b25 | 2704 | |
0ea055b3 | 2705 | if (container_disk_lock(c0)) |
dfb31b25 | 2706 | return false; |
0ea055b3 | 2707 | |
8a22c168 CB |
2708 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c0->config_path, c0->name); |
2709 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2710 | goto out; |
a73846d8 | 2711 | |
8a22c168 CB |
2712 | ret = snprintf(newpath, PATH_MAX, "%s\n%s\n", c->config_path, c->name); |
2713 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2714 | goto out; |
0ea055b3 CB |
2715 | |
2716 | /* If we find an lxc-snapshot file using the old format only listing the | |
2717 | * number of snapshots we will keep using it. */ | |
2718 | f1 = fopen(path, "r"); | |
2719 | if (f1) { | |
2720 | n = fscanf(f1, "%d", &v); | |
2721 | fclose(f1); | |
2722 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2723 | ret = remove(path); |
2724 | if (ret < 0) | |
6d1400b5 | 2725 | SYSERROR("Failed to remove \"%s\"", path); |
2726 | ||
0ea055b3 CB |
2727 | n = 0; |
2728 | } | |
dfb31b25 | 2729 | } |
6d1400b5 | 2730 | |
0ea055b3 CB |
2731 | if (n == 1) { |
2732 | v += inc ? 1 : -1; | |
2733 | f1 = fopen(path, "w"); | |
2734 | if (!f1) | |
2735 | goto out; | |
6d1400b5 | 2736 | |
0ea055b3 CB |
2737 | if (fprintf(f1, "%d\n", v) < 0) { |
2738 | ERROR("Error writing new snapshots value"); | |
2739 | fclose(f1); | |
2740 | goto out; | |
2741 | } | |
6d1400b5 | 2742 | |
0ea055b3 CB |
2743 | ret = fclose(f1); |
2744 | if (ret != 0) { | |
2745 | SYSERROR("Error writing to or closing snapshots file"); | |
2746 | goto out; | |
2747 | } | |
2748 | } else { | |
2749 | /* Here we know that we have or can use an lxc-snapshot file | |
2750 | * using the new format. */ | |
2751 | if (inc) { | |
2752 | f1 = fopen(path, "a"); | |
2753 | if (!f1) | |
2754 | goto out; | |
2755 | ||
2756 | if (fprintf(f1, "%s", newpath) < 0) { | |
2757 | ERROR("Error writing new snapshots entry"); | |
2758 | ret = fclose(f1); | |
2759 | if (ret != 0) | |
2760 | SYSERROR("Error writing to or closing snapshots file"); | |
2761 | goto out; | |
2762 | } | |
2763 | ||
2764 | ret = fclose(f1); | |
2765 | if (ret != 0) { | |
2766 | SYSERROR("Error writing to or closing snapshots file"); | |
2767 | goto out; | |
2768 | } | |
2769 | } else if (!inc) { | |
d028235d SG |
2770 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2771 | goto out; | |
2772 | ||
2773 | if (fstat(fd, &fbuf) < 0) { | |
2774 | close(fd); | |
2775 | goto out; | |
2776 | } | |
2777 | ||
2778 | if (fbuf.st_size != 0) { | |
25086a5f | 2779 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2780 | if (buf == MAP_FAILED) { |
2781 | SYSERROR("Failed to create mapping %s", path); | |
2782 | close(fd); | |
2783 | goto out; | |
2784 | } | |
2785 | ||
2786 | len = strlen(newpath); | |
2787 | while ((del = strstr((char *)buf, newpath))) { | |
2788 | memmove(del, del + len, strlen(del) - len + 1); | |
2789 | bytes += len; | |
2790 | } | |
2791 | ||
25086a5f | 2792 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2793 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2794 | SYSERROR("Failed to truncate file %s", path); | |
2795 | close(fd); | |
2796 | goto out; | |
2797 | } | |
2798 | } | |
a73846d8 | 2799 | |
d028235d SG |
2800 | close(fd); |
2801 | } | |
0ea055b3 CB |
2802 | |
2803 | /* If the lxc-snapshot file is empty, remove it. */ | |
2804 | if (stat(path, &fbuf) < 0) | |
2805 | goto out; | |
6d1400b5 | 2806 | |
d028235d | 2807 | if (!fbuf.st_size) { |
71261a5c CB |
2808 | ret = remove(path); |
2809 | if (ret < 0) | |
2810 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2811 | } |
dfb31b25 SH |
2812 | } |
2813 | ||
2814 | bret = true; | |
2815 | ||
2816 | out: | |
0ea055b3 | 2817 | container_disk_unlock(c0); |
dfb31b25 SH |
2818 | return bret; |
2819 | } | |
2820 | ||
d825fff3 | 2821 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2822 | { |
2823 | struct lxc_container *p; | |
8a22c168 | 2824 | char *lxcpath = NULL, *lxcname = NULL, path[PATH_MAX]; |
dfb31b25 SH |
2825 | size_t pathlen = 0, namelen = 0; |
2826 | FILE *f; | |
2827 | int ret; | |
2828 | ||
8a22c168 | 2829 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", |
dfb31b25 | 2830 | c->config_path, c->name); |
8a22c168 | 2831 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
2832 | ERROR("Path name too long"); |
2833 | return; | |
2834 | } | |
a73846d8 | 2835 | |
025ed0f3 | 2836 | f = fopen(path, "r"); |
025ed0f3 | 2837 | if (f == NULL) |
dfb31b25 | 2838 | return; |
a73846d8 | 2839 | |
dfb31b25 SH |
2840 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2841 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2842 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2843 | goto out; |
2844 | } | |
7ad37670 CB |
2845 | |
2846 | remove_trailing_newlines(lxcpath); | |
2847 | remove_trailing_newlines(lxcname); | |
2848 | ||
dfb31b25 SH |
2849 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2850 | ERROR("Unable to find dependent container %s:%s", | |
2851 | lxcpath, lxcname); | |
2852 | continue; | |
2853 | } | |
a73846d8 | 2854 | |
0ea055b3 CB |
2855 | if (!mod_rdep(p, c, inc)) |
2856 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2857 | lxcpath, lxcname); |
a73846d8 | 2858 | |
dfb31b25 SH |
2859 | lxc_container_put(p); |
2860 | } | |
a73846d8 | 2861 | |
dfb31b25 | 2862 | out: |
f10fad2f ME |
2863 | free(lxcpath); |
2864 | free(lxcname); | |
dfb31b25 SH |
2865 | fclose(f); |
2866 | } | |
2867 | ||
18aa217b | 2868 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2869 | { |
0ea055b3 | 2870 | FILE *f; |
8a22c168 | 2871 | char path[PATH_MAX]; |
dfb31b25 | 2872 | int ret, v; |
0ea055b3 | 2873 | struct stat fbuf; |
dfb31b25 SH |
2874 | bool bret = false; |
2875 | ||
8a22c168 | 2876 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c->config_path, |
dfb31b25 | 2877 | c->name); |
8a22c168 | 2878 | if (ret < 0 || ret > PATH_MAX) |
dfb31b25 | 2879 | goto out; |
a73846d8 | 2880 | |
0ea055b3 CB |
2881 | /* If the file doesn't exist there are no snapshots. */ |
2882 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2883 | goto out; |
a73846d8 | 2884 | |
0ea055b3 CB |
2885 | v = fbuf.st_size; |
2886 | if (v != 0) { | |
2887 | f = fopen(path, "r"); | |
2888 | if (!f) | |
2889 | goto out; | |
a73846d8 | 2890 | |
0ea055b3 CB |
2891 | ret = fscanf(f, "%d", &v); |
2892 | fclose(f); | |
1a0e70ac | 2893 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2894 | if (ret != 1) |
2895 | INFO("Container uses new lxc-snapshots format %s", path); | |
2896 | } | |
a73846d8 | 2897 | |
dfb31b25 SH |
2898 | bret = v != 0; |
2899 | ||
2900 | out: | |
2901 | return bret; | |
2902 | } | |
2903 | ||
18aa217b SH |
2904 | static bool has_snapshots(struct lxc_container *c) |
2905 | { | |
8a22c168 | 2906 | char path[PATH_MAX]; |
74f96976 | 2907 | struct dirent *direntp; |
18aa217b SH |
2908 | int count=0; |
2909 | DIR *dir; | |
2910 | ||
2911 | if (!get_snappath_dir(c, path)) | |
2912 | return false; | |
a73846d8 | 2913 | |
18aa217b SH |
2914 | dir = opendir(path); |
2915 | if (!dir) | |
2916 | return false; | |
a73846d8 | 2917 | |
74f96976 | 2918 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2919 | if (!strcmp(direntp->d_name, ".")) |
2920 | continue; | |
2921 | ||
2922 | if (!strcmp(direntp->d_name, "..")) | |
2923 | continue; | |
2924 | count++; | |
2925 | break; | |
2926 | } | |
a73846d8 | 2927 | |
18aa217b SH |
2928 | closedir(dir); |
2929 | return count > 0; | |
2930 | } | |
2931 | ||
297c2d58 | 2932 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2933 | int ret; |
2934 | ||
e0010464 | 2935 | if (am_guest_unpriv()) { |
ee484f7f CB |
2936 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2937 | "storage_destroy_wrapper"); | |
2938 | if (ret < 0) | |
d028235d | 2939 | return false; |
ee484f7f | 2940 | |
d028235d SG |
2941 | return true; |
2942 | } | |
ee484f7f | 2943 | |
10bc1861 | 2944 | return storage_destroy(conf); |
297c2d58 CB |
2945 | } |
2946 | ||
4355ab5f SH |
2947 | static int lxc_rmdir_onedev_wrapper(void *data) |
2948 | { | |
2949 | char *arg = (char *) data; | |
18aa217b | 2950 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2951 | } |
2952 | ||
17a367d8 | 2953 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2954 | { |
17a367d8 CB |
2955 | char *arg = data; |
2956 | return unlink(arg); | |
2957 | } | |
2958 | ||
2959 | static bool container_destroy(struct lxc_container *c, | |
2960 | struct lxc_storage *storage) | |
2961 | { | |
2962 | const char *p1; | |
2963 | size_t len; | |
2964 | struct lxc_conf *conf; | |
2965 | char *path = NULL; | |
c868b261 | 2966 | bool bret = false; |
297c2d58 | 2967 | int ret = 0; |
72d0e1cb | 2968 | |
858377e4 | 2969 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2970 | return false; |
2971 | ||
a70a69e8 | 2972 | conf = c->lxc_conf; |
3bc449ed | 2973 | if (container_disk_lock(c)) |
72d0e1cb | 2974 | return false; |
72d0e1cb | 2975 | |
39dc698c | 2976 | if (!is_stopped(c)) { |
1a0e70ac | 2977 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2978 | ERROR("container %s is not stopped", c->name); |
2979 | goto out; | |
72d0e1cb SG |
2980 | } |
2981 | ||
a70a69e8 | 2982 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2983 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2984 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2985 | SYSERROR("Failed to set environment variable for container name"); |
2986 | ||
2987 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2988 | SYSERROR("Failed to set environment variable for config path"); | |
2989 | ||
2990 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2991 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2992 | ||
2993 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2994 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2995 | ||
2996 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2997 | SYSERROR("Failed to set environment variable for console path"); | |
2998 | ||
2999 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
3000 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
3001 | /* End of environment variable setup for hooks */ |
3002 | ||
14a7b0f9 | 3003 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 3004 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
3005 | goto out; |
3006 | } | |
3007 | } | |
3008 | ||
3009 | if (current_config && conf == current_config) { | |
858377e4 | 3010 | current_config = NULL; |
a73846d8 | 3011 | |
37cf711b SY |
3012 | if (conf->logfd != -1) { |
3013 | close(conf->logfd); | |
3014 | conf->logfd = -1; | |
858377e4 SH |
3015 | } |
3016 | } | |
3017 | ||
6e54330c CB |
3018 | /* LXC is not managing the storage of the container. */ |
3019 | if (conf && !conf->rootfs.managed) | |
3020 | goto on_success; | |
3021 | ||
d028235d SG |
3022 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
3023 | if (!do_destroy_container(conf)) { | |
3024 | ERROR("Error destroying rootfs for %s", c->name); | |
3025 | goto out; | |
3026 | } | |
3027 | INFO("Destroyed rootfs for %s", c->name); | |
3028 | } | |
60bf62d4 | 3029 | |
dfb31b25 SH |
3030 | mod_all_rdeps(c, false); |
3031 | ||
17a367d8 CB |
3032 | p1 = do_lxcapi_get_config_path(c); |
3033 | /* strlen(p1) | |
3034 | * + | |
3035 | * / | |
3036 | * + | |
3037 | * strlen(c->name) | |
3038 | * + | |
3039 | * / | |
3040 | * + | |
3041 | * strlen("config") = 6 | |
3042 | * + | |
3043 | * \0 | |
3044 | */ | |
3045 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
3046 | path = malloc(len); | |
3047 | if (!path) { | |
3048 | ERROR("Failed to allocate memory"); | |
3049 | goto out; | |
3050 | } | |
3051 | ||
3052 | /* For an overlay container the rootfs is considered immutable and | |
3053 | * cannot be removed when restoring from a snapshot. | |
3054 | */ | |
3055 | if (storage && (!strcmp(storage->type, "overlay") || | |
3056 | !strcmp(storage->type, "overlayfs")) && | |
3057 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3058 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
3059 | if (ret < 0 || (size_t)ret >= len) | |
3060 | goto out; | |
3061 | ||
e0010464 | 3062 | if (am_guest_unpriv()) |
17a367d8 CB |
3063 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3064 | "lxc_unlink_exec_wrapper"); | |
3065 | else | |
3066 | ret = unlink(path); | |
3067 | if (ret < 0) { | |
3068 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3069 | path, c->name); | |
3070 | goto out; | |
3071 | } | |
3072 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3073 | ||
3074 | bret = true; | |
3075 | goto out; | |
3076 | } | |
3077 | ||
3078 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3079 | if (ret < 0 || (size_t)ret >= len) | |
3080 | goto out; | |
a73846d8 | 3081 | |
e0010464 | 3082 | if (am_guest_unpriv()) |
ee484f7f CB |
3083 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3084 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3085 | else |
18aa217b | 3086 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3087 | if (ret < 0) { |
17a367d8 CB |
3088 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3089 | c->name); | |
60bf62d4 SH |
3090 | goto out; |
3091 | } | |
17a367d8 | 3092 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3093 | |
6e54330c | 3094 | on_success: |
fef48dc9 | 3095 | bret = true; |
60bf62d4 SH |
3096 | |
3097 | out: | |
17a367d8 CB |
3098 | if (path) |
3099 | free(path); | |
a73846d8 | 3100 | |
3bc449ed | 3101 | container_disk_unlock(c); |
fef48dc9 | 3102 | return bret; |
72d0e1cb SG |
3103 | } |
3104 | ||
858377e4 | 3105 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3106 | { |
3107 | if (!c || !lxcapi_is_defined(c)) | |
3108 | return false; | |
2b2655a8 | 3109 | |
6e54330c CB |
3110 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3111 | if (has_snapshots(c)) { | |
3112 | ERROR("Container %s has snapshots; not removing", c->name); | |
3113 | return false; | |
3114 | } | |
18aa217b | 3115 | |
6e54330c CB |
3116 | if (has_fs_snapshots(c)) { |
3117 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3118 | return false; | |
3119 | } | |
18aa217b SH |
3120 | } |
3121 | ||
17a367d8 | 3122 | return container_destroy(c, NULL); |
18aa217b SH |
3123 | } |
3124 | ||
858377e4 | 3125 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3126 | |
858377e4 | 3127 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3128 | { |
3129 | if (!c || !lxcapi_is_defined(c)) | |
3130 | return false; | |
a73846d8 | 3131 | |
18aa217b SH |
3132 | if (!lxcapi_snapshot_destroy_all(c)) { |
3133 | ERROR("Error deleting all snapshots"); | |
3134 | return false; | |
3135 | } | |
a73846d8 | 3136 | |
18aa217b SH |
3137 | return lxcapi_destroy(c); |
3138 | } | |
3139 | ||
858377e4 SH |
3140 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3141 | ||
0d9cd9c3 CB |
3142 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3143 | const char *v) | |
96532523 | 3144 | { |
0d9cd9c3 | 3145 | int ret; |
96532523 | 3146 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3147 | bool bret = true; |
3148 | ||
3149 | config = lxc_get_config(key); | |
3150 | if (!config) | |
3151 | return -EINVAL; | |
3152 | ||
3153 | ret = config->set(key, v, conf, NULL); | |
3154 | if (ret < 0) | |
3155 | return -EINVAL; | |
3156 | ||
3157 | if (lxc_config_value_empty(v)) | |
3158 | do_clear_unexp_config_line(conf, key); | |
3159 | else | |
3160 | bret = do_append_unexp_config_line(conf, key, v); | |
3161 | if (!bret) | |
3162 | return -ENOMEM; | |
3163 | ||
3164 | return 0; | |
3165 | } | |
3166 | ||
3167 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3168 | const char *v) | |
3169 | { | |
3170 | int ret; | |
96532523 SH |
3171 | |
3172 | if (!c->lxc_conf) | |
3173 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3174 | |
6b0d5538 | 3175 | if (!c->lxc_conf) |
96532523 | 3176 | return false; |
4222a9f4 | 3177 | |
0d9cd9c3 CB |
3178 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3179 | if (ret < 0) | |
f979ac15 | 3180 | return false; |
4222a9f4 | 3181 | |
0d9cd9c3 | 3182 | return true; |
96532523 SH |
3183 | } |
3184 | ||
858377e4 | 3185 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3186 | { |
72d0e1cb | 3187 | bool b = false; |
72d0e1cb SG |
3188 | |
3189 | if (!c) | |
3190 | return false; | |
3191 | ||
5cee8c50 | 3192 | if (container_mem_lock(c)) |
72d0e1cb SG |
3193 | return false; |
3194 | ||
0d9cd9c3 | 3195 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3196 | |
5cee8c50 | 3197 | container_mem_unlock(c); |
72d0e1cb SG |
3198 | return b; |
3199 | } | |
3200 | ||
858377e4 SH |
3201 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3202 | ||
72d0e1cb SG |
3203 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3204 | { | |
3205 | if (!c || !c->configfile) | |
3206 | return NULL; | |
a73846d8 | 3207 | |
72d0e1cb SG |
3208 | return strdup(c->configfile); |
3209 | } | |
3210 | ||
2a59a681 SH |
3211 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3212 | { | |
3213 | if (!c || !c->config_path) | |
3214 | return NULL; | |
a73846d8 | 3215 | |
2a59a681 SH |
3216 | return (const char *)(c->config_path); |
3217 | } | |
3218 | ||
afeecbba SH |
3219 | /* |
3220 | * not for export | |
3221 | * Just recalculate the c->configfile based on the | |
3222 | * c->config_path, which must be set. | |
3223 | * The lxc_container must be locked or not yet public. | |
3224 | */ | |
3225 | static bool set_config_filename(struct lxc_container *c) | |
3226 | { | |
3227 | char *newpath; | |
3228 | int len, ret; | |
3229 | ||
3230 | if (!c->config_path) | |
3231 | return false; | |
3232 | ||
3233 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3234 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3235 | newpath = malloc(len); | |
3236 | if (!newpath) | |
3237 | return false; | |
3238 | ||
3239 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3240 | if (ret < 0 || ret >= len) { | |
3241 | fprintf(stderr, "Error printing out config file name\n"); | |
3242 | free(newpath); | |
3243 | return false; | |
3244 | } | |
3245 | ||
f10fad2f | 3246 | free(c->configfile); |
afeecbba SH |
3247 | c->configfile = newpath; |
3248 | ||
3249 | return true; | |
3250 | } | |
3251 | ||
858377e4 | 3252 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3253 | { |
3254 | char *p; | |
3255 | bool b = false; | |
afeecbba | 3256 | char *oldpath = NULL; |
2a59a681 SH |
3257 | |
3258 | if (!c) | |
3259 | return b; | |
3260 | ||
5cee8c50 | 3261 | if (container_mem_lock(c)) |
2a59a681 SH |
3262 | return b; |
3263 | ||
3264 | p = strdup(path); | |
afeecbba SH |
3265 | if (!p) { |
3266 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3267 | goto err; |
afeecbba SH |
3268 | } |
3269 | ||
2a59a681 SH |
3270 | b = true; |
3271 | if (c->config_path) | |
afeecbba | 3272 | oldpath = c->config_path; |
2a59a681 | 3273 | c->config_path = p; |
afeecbba SH |
3274 | |
3275 | /* Since we've changed the config path, we have to change the | |
3276 | * config file name too */ | |
3277 | if (!set_config_filename(c)) { | |
3278 | ERROR("Out of memory setting new config filename"); | |
3279 | b = false; | |
3280 | free(c->config_path); | |
3281 | c->config_path = oldpath; | |
3282 | oldpath = NULL; | |
3283 | } | |
a73846d8 | 3284 | |
2a59a681 | 3285 | err: |
f10fad2f | 3286 | free(oldpath); |
5cee8c50 | 3287 | container_mem_unlock(c); |
2a59a681 SH |
3288 | return b; |
3289 | } | |
3290 | ||
858377e4 | 3291 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3292 | |
858377e4 | 3293 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3294 | { |
3295 | int ret; | |
2202afc9 | 3296 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3297 | |
3298 | if (!c) | |
3299 | return false; | |
3300 | ||
3bc449ed | 3301 | if (is_stopped(c)) |
794dd120 SH |
3302 | return false; |
3303 | ||
5a087e05 | 3304 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3305 | if (!cgroup_ops) |
3306 | return false; | |
3307 | ||
2202afc9 | 3308 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed | 3309 | |
2202afc9 CB |
3310 | cgroup_exit(cgroup_ops); |
3311 | ||
3bc449ed | 3312 | return ret == 0; |
794dd120 SH |
3313 | } |
3314 | ||
858377e4 SH |
3315 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3316 | ||
3317 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3318 | { |
3bc449ed | 3319 | int ret; |
2202afc9 | 3320 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3321 | |
6502006a | 3322 | if (!c) |
794dd120 SH |
3323 | return -1; |
3324 | ||
3bc449ed | 3325 | if (is_stopped(c)) |
794dd120 SH |
3326 | return -1; |
3327 | ||
5a087e05 | 3328 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3329 | if (!cgroup_ops) |
3330 | return -1; | |
3331 | ||
2202afc9 CB |
3332 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3333 | c->config_path); | |
2202afc9 CB |
3334 | |
3335 | cgroup_exit(cgroup_ops); | |
3336 | ||
794dd120 SH |
3337 | return ret; |
3338 | } | |
3339 | ||
858377e4 SH |
3340 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3341 | ||
593e8478 | 3342 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3343 | { |
593e8478 | 3344 | return lxc_global_config_value(key); |
a8428dfa SH |
3345 | } |
3346 | ||
b6b918a1 SG |
3347 | const char *lxc_get_version(void) |
3348 | { | |
95ee490b | 3349 | return LXC_VERSION; |
b6b918a1 SG |
3350 | } |
3351 | ||
f0ca2726 | 3352 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3353 | { |
3354 | int in, out; | |
3355 | ssize_t len, ret; | |
3356 | char buf[8096]; | |
3357 | struct stat sbuf; | |
3358 | ||
3359 | if (file_exists(new)) { | |
3360 | ERROR("copy destination %s exists", new); | |
3361 | return -1; | |
3362 | } | |
a73846d8 | 3363 | |
9be53773 SH |
3364 | ret = stat(old, &sbuf); |
3365 | if (ret < 0) { | |
dfb31b25 | 3366 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3367 | return -1; |
3368 | } | |
3369 | ||
3370 | in = open(old, O_RDONLY); | |
3371 | if (in < 0) { | |
dfb31b25 | 3372 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3373 | return -1; |
3374 | } | |
a73846d8 | 3375 | |
9be53773 SH |
3376 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3377 | if (out < 0) { | |
dfb31b25 | 3378 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3379 | close(in); |
3380 | return -1; | |
3381 | } | |
3382 | ||
51a8a74c | 3383 | for (;;) { |
3e1e9db8 | 3384 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3385 | if (len < 0) { |
dfb31b25 | 3386 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3387 | goto err; |
3388 | } | |
a73846d8 | 3389 | |
9be53773 SH |
3390 | if (len == 0) |
3391 | break; | |
a73846d8 | 3392 | |
2a2a676d | 3393 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3394 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3395 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3396 | goto err; |
3397 | } | |
3398 | } | |
a73846d8 | 3399 | |
9be53773 SH |
3400 | close(in); |
3401 | close(out); | |
3402 | ||
1a0e70ac | 3403 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3404 | ret = chmod(new, sbuf.st_mode); |
3405 | if (ret) { | |
dfb31b25 | 3406 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3407 | return -1; |
3408 | } | |
3409 | ||
3410 | return 0; | |
3411 | ||
3412 | err: | |
3413 | close(in); | |
3414 | close(out); | |
3415 | return -1; | |
3416 | } | |
3417 | ||
9be53773 SH |
3418 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3419 | { | |
7a99b5a0 | 3420 | __do_free char *cpath = NULL; |
619256b5 | 3421 | int i, len, ret; |
9be53773 | 3422 | struct lxc_list *it; |
619256b5 ÇO |
3423 | |
3424 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
f5849fd7 | 3425 | cpath = must_realloc(NULL, len); |
619256b5 ÇO |
3426 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); |
3427 | if (ret < 0 || ret >= len) | |
3428 | return -1; | |
9be53773 SH |
3429 | |
3430 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3431 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3432 | char *hookname = it->elem; | |
c32981c3 | 3433 | char *fname = strrchr(hookname, '/'); |
8a22c168 | 3434 | char tmppath[PATH_MAX]; |
1a0e70ac | 3435 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3436 | return 0; |
a73846d8 | 3437 | |
619256b5 | 3438 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3439 | /* this hook is public - ignore */ |
619256b5 ÇO |
3440 | continue; |
3441 | } | |
a73846d8 | 3442 | |
1a0e70ac | 3443 | /* copy the script, and change the entry in confile */ |
8a22c168 | 3444 | ret = snprintf(tmppath, PATH_MAX, "%s/%s/%s", |
9be53773 | 3445 | c->config_path, c->name, fname+1); |
8a22c168 | 3446 | if (ret < 0 || ret >= PATH_MAX) |
9be53773 | 3447 | return -1; |
a73846d8 | 3448 | |
9be53773 SH |
3449 | ret = copy_file(it->elem, tmppath); |
3450 | if (ret < 0) | |
3451 | return -1; | |
a73846d8 | 3452 | |
9be53773 | 3453 | free(it->elem); |
a73846d8 | 3454 | |
9be53773 SH |
3455 | it->elem = strdup(tmppath); |
3456 | if (!it->elem) { | |
3457 | ERROR("out of memory copying hook path"); | |
3458 | return -1; | |
3459 | } | |
9be53773 SH |
3460 | } |
3461 | } | |
3462 | ||
67702c21 SH |
3463 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3464 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3465 | ERROR("Error saving new hooks in clone"); |
3466 | return -1; | |
3467 | } | |
a73846d8 | 3468 | |
858377e4 | 3469 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3470 | return 0; |
3471 | } | |
3472 | ||
9be53773 SH |
3473 | |
3474 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3475 | { | |
8a22c168 | 3476 | char newpath[PATH_MAX]; |
9be53773 SH |
3477 | char *oldpath = oldc->lxc_conf->fstab; |
3478 | int ret; | |
3479 | ||
3480 | if (!oldpath) | |
3481 | return 0; | |
3482 | ||
47148e96 CB |
3483 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3484 | ||
c32981c3 | 3485 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3486 | if (!p) |
3487 | return -1; | |
a73846d8 | 3488 | |
8a22c168 | 3489 | ret = snprintf(newpath, PATH_MAX, "%s/%s%s", |
9be53773 | 3490 | c->config_path, c->name, p); |
8a22c168 | 3491 | if (ret < 0 || ret >= PATH_MAX) { |
9be53773 SH |
3492 | ERROR("error printing new path for %s", oldpath); |
3493 | return -1; | |
3494 | } | |
a73846d8 | 3495 | |
9be53773 SH |
3496 | if (file_exists(newpath)) { |
3497 | ERROR("error: fstab file %s exists", newpath); | |
3498 | return -1; | |
3499 | } | |
3500 | ||
3501 | if (copy_file(oldpath, newpath) < 0) { | |
3502 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3503 | return -1; | |
3504 | } | |
a73846d8 | 3505 | |
9be53773 | 3506 | free(c->lxc_conf->fstab); |
a73846d8 | 3507 | |
9be53773 SH |
3508 | c->lxc_conf->fstab = strdup(newpath); |
3509 | if (!c->lxc_conf->fstab) { | |
3510 | ERROR("error: allocating pathname"); | |
3511 | return -1; | |
3512 | } | |
a73846d8 | 3513 | |
47148e96 | 3514 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3515 | ERROR("error saving new lxctab"); |
3516 | return -1; | |
3517 | } | |
9be53773 SH |
3518 | |
3519 | return 0; | |
3520 | } | |
3521 | ||
dfb31b25 SH |
3522 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3523 | { | |
8a22c168 | 3524 | char path0[PATH_MAX], path1[PATH_MAX]; |
dfb31b25 SH |
3525 | int ret; |
3526 | ||
8a22c168 | 3527 | ret = snprintf(path0, PATH_MAX, "%s/%s/lxc_rdepends", c0->config_path, |
dfb31b25 | 3528 | c0->name); |
8a22c168 | 3529 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3530 | WARN("Error copying reverse dependencies"); |
3531 | return; | |
3532 | } | |
a73846d8 | 3533 | |
8a22c168 | 3534 | ret = snprintf(path1, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3535 | c->name); |
8a22c168 | 3536 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3537 | WARN("Error copying reverse dependencies"); |
3538 | return; | |
3539 | } | |
a73846d8 | 3540 | |
dfb31b25 SH |
3541 | if (copy_file(path0, path1) < 0) { |
3542 | INFO("Error copying reverse dependencies"); | |
3543 | return; | |
3544 | } | |
3545 | } | |
3546 | ||
3547 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3548 | { | |
3549 | int ret; | |
8a22c168 | 3550 | char path[PATH_MAX]; |
dfb31b25 SH |
3551 | FILE *f; |
3552 | bool bret; | |
3553 | ||
8a22c168 | 3554 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3555 | c->name); |
8a22c168 | 3556 | if (ret < 0 || ret >= PATH_MAX) |
dfb31b25 | 3557 | return false; |
a73846d8 | 3558 | |
dfb31b25 SH |
3559 | f = fopen(path, "a"); |
3560 | if (!f) | |
3561 | return false; | |
a73846d8 | 3562 | |
dfb31b25 | 3563 | bret = true; |
a73846d8 | 3564 | |
1a0e70ac | 3565 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3566 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3567 | bret = false; | |
a73846d8 | 3568 | |
dfb31b25 SH |
3569 | if (fclose(f) != 0) |
3570 | bret = false; | |
a73846d8 | 3571 | |
dfb31b25 SH |
3572 | return bret; |
3573 | } | |
3574 | ||
15a90a10 SH |
3575 | /* |
3576 | * If the fs natively supports snapshot clones with no penalty, | |
3577 | * then default to those even if not requested. | |
3578 | * Currently we only do this for btrfs. | |
3579 | */ | |
3580 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3581 | struct lxc_container *c1) | |
3582 | { | |
7a99b5a0 | 3583 | __do_free char *p0 = NULL, *p1 = NULL; |
2afdc31f | 3584 | int ret; |
15a90a10 SH |
3585 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3586 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
6e0fa6a0 | 3587 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3588 | |
f5849fd7 CB |
3589 | p0 = must_realloc(NULL, l0 + 1); |
3590 | p1 = must_realloc(NULL, l1 + 1); | |
2afdc31f CB |
3591 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3592 | if (ret < 0 || ret >= l0) | |
3593 | return false; | |
3594 | ||
3595 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3596 | if (ret < 0 || ret >= l1) | |
3597 | return false; | |
9a09badc CB |
3598 | |
3599 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3600 | return false; | |
3601 | ||
6e0fa6a0 CB |
3602 | if (is_btrfs_subvol(rootfs) <= 0) |
3603 | return false; | |
3604 | ||
15a90a10 SH |
3605 | return btrfs_same_fs(p0, p1) == 0; |
3606 | } | |
3607 | ||
9be53773 | 3608 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3609 | const char *newtype, int flags, const char *bdevdata, |
3610 | uint64_t newsize) | |
9be53773 | 3611 | { |
10bc1861 | 3612 | struct lxc_storage *bdev; |
07db51a2 | 3613 | bool need_rdep; |
9be53773 | 3614 | |
15a90a10 SH |
3615 | if (should_default_to_snapshot(c0, c)) |
3616 | flags |= LXC_CLONE_SNAPSHOT; | |
3617 | ||
10bc1861 CB |
3618 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3619 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3620 | if (!bdev) { |
763429b6 | 3621 | ERROR("Error copying storage."); |
9be53773 SH |
3622 | return -1; |
3623 | } | |
763429b6 CB |
3624 | |
3625 | /* Set new rootfs. */ | |
9be53773 SH |
3626 | free(c->lxc_conf->rootfs.path); |
3627 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3628 | storage_put(bdev); |
763429b6 | 3629 | |
dfb31b25 | 3630 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3631 | ERROR("Out of memory while setting storage path."); |
3632 | return -1; | |
3633 | } | |
763429b6 | 3634 | |
7a96a068 CB |
3635 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3636 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3637 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3638 | c->lxc_conf->rootfs.path)) { |
3639 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3640 | return -1; |
3641 | } | |
763429b6 | 3642 | |
eee59f94 SH |
3643 | if (flags & LXC_CLONE_SNAPSHOT) |
3644 | copy_rdepends(c, c0); | |
a73846d8 | 3645 | |
dfb31b25 SH |
3646 | if (need_rdep) { |
3647 | if (!add_rdepends(c, c0)) | |
3648 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3649 | c->name, c0->name); |
dfb31b25 SH |
3650 | } |
3651 | ||
3652 | mod_all_rdeps(c, true); | |
3653 | ||
9be53773 SH |
3654 | return 0; |
3655 | } | |
3656 | ||
1354955b SH |
3657 | struct clone_update_data { |
3658 | struct lxc_container *c0; | |
3659 | struct lxc_container *c1; | |
3660 | int flags; | |
3661 | char **hookargs; | |
3662 | }; | |
3663 | ||
3664 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3665 | { |
1354955b SH |
3666 | struct lxc_container *c0 = data->c0; |
3667 | struct lxc_container *c = data->c1; | |
3668 | int flags = data->flags; | |
3669 | char **hookargs = data->hookargs; | |
9be53773 | 3670 | int ret = -1; |
8a22c168 | 3671 | char path[PATH_MAX]; |
10bc1861 | 3672 | struct lxc_storage *bdev; |
9be53773 | 3673 | FILE *fout; |
148e91f5 | 3674 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3675 | |
3676 | /* update hostname in rootfs */ | |
3677 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3678 | ||
1354955b SH |
3679 | if (setgid(0) < 0) { |
3680 | ERROR("Failed to setgid to 0"); | |
3681 | return -1; | |
3682 | } | |
a73846d8 | 3683 | |
1354955b SH |
3684 | if (setuid(0) < 0) { |
3685 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3686 | return -1; |
1354955b | 3687 | } |
a73846d8 | 3688 | |
c476bdce SH |
3689 | if (setgroups(0, NULL) < 0) |
3690 | WARN("Failed to clear groups"); | |
9be53773 | 3691 | |
1354955b SH |
3692 | if (unshare(CLONE_NEWNS) < 0) |
3693 | return -1; | |
a73846d8 | 3694 | |
8a388ed4 | 3695 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3696 | if (!bdev) |
1354955b | 3697 | return -1; |
a73846d8 | 3698 | |
cf3ef16d SH |
3699 | if (strcmp(bdev->type, "dir") != 0) { |
3700 | if (unshare(CLONE_NEWNS) < 0) { | |
3701 | ERROR("error unsharing mounts"); | |
10bc1861 | 3702 | storage_put(bdev); |
1354955b | 3703 | return -1; |
cf3ef16d | 3704 | } |
a73846d8 | 3705 | |
2c6f3fc9 SH |
3706 | if (detect_shared_rootfs()) { |
3707 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3708 | SYSERROR("Failed to make / rslave"); | |
3709 | ERROR("Continuing..."); | |
3710 | } | |
3711 | } | |
a73846d8 | 3712 | |
e7de366c | 3713 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3714 | storage_put(bdev); |
1354955b | 3715 | return -1; |
e7de366c | 3716 | } |
1a0e70ac | 3717 | } else { /* TODO come up with a better way */ |
f10fad2f | 3718 | free(bdev->dest); |
3d7e738a | 3719 | bdev->dest = strdup(lxc_storage_get_path(bdev->src, bdev->type)); |
cf3ef16d | 3720 | } |
148e91f5 SH |
3721 | |
3722 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3723 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3724 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3725 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3726 | |
3727 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3728 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3729 | |
3730 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3731 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3732 | |
3733 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3734 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3735 | |
3736 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3737 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3738 | |
14a7b0f9 | 3739 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3740 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3741 | storage_put(bdev); |
1354955b | 3742 | return -1; |
148e91f5 SH |
3743 | } |
3744 | } | |
3745 | ||
3746 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
8a22c168 | 3747 | ret = snprintf(path, PATH_MAX, "%s/etc/hostname", bdev->dest); |
10bc1861 | 3748 | storage_put(bdev); |
e7de366c | 3749 | |
8a22c168 | 3750 | if (ret < 0 || ret >= PATH_MAX) |
1354955b | 3751 | return -1; |
a73846d8 | 3752 | |
8058be39 | 3753 | if (!file_exists(path)) |
1354955b | 3754 | return 0; |
a73846d8 | 3755 | |
148e91f5 | 3756 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3757 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3758 | return 0; |
148e91f5 | 3759 | } |
a73846d8 | 3760 | |
a684f0b7 ÇO |
3761 | if (fprintf(fout, "%s", c->name) < 0) { |
3762 | fclose(fout); | |
1354955b | 3763 | return -1; |
6849cb5b | 3764 | } |
a73846d8 | 3765 | |
148e91f5 | 3766 | if (fclose(fout) < 0) |
1354955b | 3767 | return -1; |
10bc1861 CB |
3768 | } else { |
3769 | storage_put(bdev); | |
9be53773 | 3770 | } |
e7de366c | 3771 | |
1354955b SH |
3772 | return 0; |
3773 | } | |
3774 | ||
3775 | static int clone_update_rootfs_wrapper(void *data) | |
3776 | { | |
3777 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3778 | return clone_update_rootfs(arg); | |
9be53773 SH |
3779 | } |
3780 | ||
3781 | /* | |
3782 | * We want to support: | |
3783 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3784 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3785 | ||
ba115175 CB |
3786 | -s [ implies overlay] |
3787 | -s -B overlay | |
9be53773 SH |
3788 | |
3789 | only rootfs gets converted (copied/snapshotted) on clone. | |
3790 | */ | |
3791 | ||
d5752559 | 3792 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3793 | { |
c32981c3 | 3794 | char *p = strrchr(path, '/'); |
d5752559 | 3795 | int ret = -1; |
9be53773 SH |
3796 | |
3797 | if (!p) | |
3798 | return -1; | |
a73846d8 | 3799 | |
9be53773 | 3800 | *p = '\0'; |
d028235d | 3801 | ret = do_create_container_dir(path, conf); |
9be53773 | 3802 | *p = '/'; |
a73846d8 | 3803 | |
9be53773 SH |
3804 | return ret; |
3805 | } | |
3806 | ||
858377e4 | 3807 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3808 | const char *lxcpath, int flags, |
d659597e | 3809 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3810 | char **hookargs) |
9be53773 | 3811 | { |
8a22c168 | 3812 | char newpath[PATH_MAX]; |
0e1a60b0 | 3813 | int fd, ret; |
1354955b | 3814 | struct clone_update_data data; |
3b392519 | 3815 | size_t saved_unexp_len; |
1354955b | 3816 | pid_t pid; |
17a367d8 CB |
3817 | int storage_copied = 0; |
3818 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3819 | struct lxc_container *c2 = NULL; | |
9be53773 | 3820 | |
858377e4 | 3821 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3822 | return NULL; |
3823 | ||
5cee8c50 | 3824 | if (container_mem_lock(c)) |
9be53773 | 3825 | return NULL; |
754076f5 BH |
3826 | if (!is_stopped(c) && !(flags & LXC_CLONE_ALLOW_RUNNING)) { |
3827 | ERROR("error: Original container (%s) is running. Use --allowrunning if you want to force a snapshot of the running container.", c->name); | |
9be53773 SH |
3828 | goto out; |
3829 | } | |
3830 | ||
1a0e70ac | 3831 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3832 | if (!newname) |
3833 | newname = c->name; | |
a73846d8 | 3834 | |
05d53f4c | 3835 | if (!lxcpath) |
858377e4 | 3836 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3837 | |
8a22c168 CB |
3838 | ret = snprintf(newpath, PATH_MAX, "%s/%s/config", lxcpath, newname); |
3839 | if (ret < 0 || ret >= PATH_MAX) { | |
9be53773 SH |
3840 | SYSERROR("clone: failed making config pathname"); |
3841 | goto out; | |
3842 | } | |
17a367d8 | 3843 | |
9be53773 SH |
3844 | if (file_exists(newpath)) { |
3845 | ERROR("error: clone: %s exists", newpath); | |
3846 | goto out; | |
3847 | } | |
3848 | ||
d5752559 | 3849 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3850 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3851 | ERROR("Error creating container dir for %s", newpath); |
3852 | goto out; | |
3853 | } | |
3854 | ||
1a0e70ac | 3855 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3856 | if (c->lxc_conf->rootfs.path) { |
3857 | origroot = c->lxc_conf->rootfs.path; | |
3858 | c->lxc_conf->rootfs.path = NULL; | |
3859 | } | |
0e1a60b0 CB |
3860 | |
3861 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3862 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3863 | if (fd < 0) { |
3864 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3865 | goto out; |
3866 | } | |
5eea90e8 SH |
3867 | |
3868 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3869 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3870 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3871 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3872 | close(fd); |
5eea90e8 SH |
3873 | goto out; |
3874 | } | |
7a96a068 | 3875 | |
7a96a068 | 3876 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3877 | write_config(fd, c->lxc_conf); |
3878 | close(fd); | |
a73846d8 | 3879 | |
8d2efe40 | 3880 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3881 | |
5eea90e8 SH |
3882 | free(c->lxc_conf->unexpanded_config); |
3883 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3884 | saved_unexp_conf = NULL; | |
3b392519 | 3885 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3886 | |
8a22c168 CB |
3887 | ret = snprintf(newpath, PATH_MAX, "%s/%s/rootfs", lxcpath, newname); |
3888 | if (ret < 0 || ret >= PATH_MAX) { | |
90b366fc CB |
3889 | SYSERROR("clone: failed making rootfs pathname"); |
3890 | goto out; | |
3891 | } | |
17a367d8 CB |
3892 | |
3893 | ret = mkdir(newpath, 0755); | |
3894 | if (ret < 0) { | |
3895 | /* For an overlay container the rootfs is considered immutable | |
3896 | * and will not have been removed when restoring from a | |
3897 | * snapshot. | |
3898 | */ | |
3899 | if (errno != ENOENT && | |
3900 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3901 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3902 | goto out; | |
3903 | } | |
9be53773 SH |
3904 | } |
3905 | ||
e0010464 | 3906 | if (am_guest_unpriv()) { |
1354955b | 3907 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3908 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3909 | goto out; |
3910 | } | |
3911 | } | |
3912 | ||
05d53f4c | 3913 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3914 | if (!c2) { |
05d53f4c SH |
3915 | ERROR("clone: failed to create new container (%s %s)", newname, |
3916 | lxcpath); | |
9be53773 SH |
3917 | goto out; |
3918 | } | |
8d2efe40 | 3919 | |
1a0e70ac | 3920 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3921 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3922 | if (ret < 0) | |
3923 | goto out; | |
9be53773 | 3924 | |
1a0e70ac | 3925 | /* update utsname */ |
3d7ad474 CB |
3926 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3927 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3928 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3929 | |
0d9cd9c3 | 3930 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3931 | ERROR("Error setting new hostname"); |
3932 | goto out; | |
3933 | } | |
96532523 SH |
3934 | } |
3935 | ||
1a0e70ac | 3936 | /* copy hooks */ |
619256b5 ÇO |
3937 | ret = copyhooks(c, c2); |
3938 | if (ret < 0) { | |
3939 | ERROR("error copying hooks"); | |
3940 | goto out; | |
9be53773 SH |
3941 | } |
3942 | ||
3943 | if (copy_fstab(c, c2) < 0) { | |
3944 | ERROR("error copying fstab"); | |
9be53773 SH |
3945 | goto out; |
3946 | } | |
3947 | ||
1a0e70ac | 3948 | /* update macaddrs */ |
6b0d5538 | 3949 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3950 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3951 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3952 | goto out; |
3953 | } | |
3954 | } | |
9be53773 | 3955 | |
1a0e70ac | 3956 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3957 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3958 | goto out; |
3959 | ||
1a0e70ac CB |
3960 | /* We've now successfully created c2's storage, so clear it out if we |
3961 | * fail after this. | |
3962 | */ | |
176d9acb SH |
3963 | storage_copied = 1; |
3964 | ||
375c2258 | 3965 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3966 | goto out; |
9be53773 | 3967 | |
1354955b SH |
3968 | if ((pid = fork()) < 0) { |
3969 | SYSERROR("fork"); | |
9be53773 | 3970 | goto out; |
1354955b | 3971 | } |
a73846d8 | 3972 | |
1354955b SH |
3973 | if (pid > 0) { |
3974 | ret = wait_for_pid(pid); | |
3975 | if (ret) | |
3976 | goto out; | |
a73846d8 | 3977 | |
1354955b SH |
3978 | container_mem_unlock(c); |
3979 | return c2; | |
3980 | } | |
a73846d8 | 3981 | |
1354955b SH |
3982 | data.c0 = c; |
3983 | data.c1 = c2; | |
3984 | data.flags = flags; | |
3985 | data.hookargs = hookargs; | |
a73846d8 | 3986 | |
e0010464 | 3987 | if (am_guest_unpriv()) |
ee484f7f CB |
3988 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3989 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3990 | else |
3991 | ret = clone_update_rootfs(&data); | |
3992 | if (ret < 0) | |
d8480a31 | 3993 | _exit(EXIT_FAILURE); |
9be53773 | 3994 | |
5cee8c50 | 3995 | container_mem_unlock(c); |
d8480a31 | 3996 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3997 | |
3998 | out: | |
5cee8c50 | 3999 | container_mem_unlock(c); |
375c2258 | 4000 | if (c2) { |
176d9acb SH |
4001 | if (!storage_copied) |
4002 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 4003 | |
375c2258 | 4004 | c2->destroy(c2); |
9be53773 | 4005 | lxc_container_put(c2); |
375c2258 | 4006 | } |
9be53773 SH |
4007 | |
4008 | return NULL; | |
4009 | } | |
4010 | ||
858377e4 SH |
4011 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
4012 | const char *lxcpath, int flags, | |
4013 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
4014 | char **hookargs) | |
4015 | { | |
4016 | struct lxc_container * ret; | |
a73846d8 | 4017 | |
858377e4 SH |
4018 | current_config = c ? c->lxc_conf : NULL; |
4019 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
4020 | current_config = NULL; | |
a73846d8 | 4021 | |
858377e4 SH |
4022 | return ret; |
4023 | } | |
4024 | ||
4025 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 4026 | { |
10bc1861 | 4027 | struct lxc_storage *bdev; |
06e5650e | 4028 | struct lxc_container *newc; |
06e5650e | 4029 | |
d693cf93 | 4030 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
4031 | return false; |
4032 | ||
18aa217b SH |
4033 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4034 | ERROR("Renaming a container with snapshots is not supported"); | |
4035 | return false; | |
4036 | } | |
a73846d8 | 4037 | |
8a388ed4 | 4038 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4039 | if (!bdev) { |
4040 | ERROR("Failed to find original backing store type"); | |
4041 | return false; | |
4042 | } | |
4043 | ||
619256b5 | 4044 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4045 | storage_put(bdev); |
06e5650e ÇO |
4046 | if (!newc) { |
4047 | lxc_container_put(newc); | |
4048 | return false; | |
4049 | } | |
4050 | ||
4051 | if (newc && lxcapi_is_defined(newc)) | |
4052 | lxc_container_put(newc); | |
4053 | ||
17a367d8 | 4054 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4055 | ERROR("Could not destroy existing container %s", c->name); |
4056 | return false; | |
4057 | } | |
a73846d8 | 4058 | |
06e5650e ÇO |
4059 | return true; |
4060 | } | |
4061 | ||
858377e4 SH |
4062 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4063 | ||
d6430143 CB |
4064 | static int lxcapi_attach(struct lxc_container *c, |
4065 | lxc_attach_exec_t exec_function, void *exec_payload, | |
4066 | lxc_attach_options_t *options, pid_t *attached_process) | |
a0e93eeb | 4067 | { |
858377e4 SH |
4068 | int ret; |
4069 | ||
a0e93eeb CS |
4070 | if (!c) |
4071 | return -1; | |
4072 | ||
858377e4 SH |
4073 | current_config = c->lxc_conf; |
4074 | ||
d6430143 CB |
4075 | ret = lxc_attach(c, exec_function, exec_payload, options, |
4076 | attached_process); | |
858377e4 SH |
4077 | current_config = NULL; |
4078 | return ret; | |
a0e93eeb CS |
4079 | } |
4080 | ||
d6430143 CB |
4081 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, |
4082 | lxc_attach_options_t *options, | |
4083 | const char *program, | |
4084 | const char *const argv[]) | |
a0e93eeb CS |
4085 | { |
4086 | lxc_attach_command_t command; | |
4087 | pid_t pid; | |
d6430143 | 4088 | int ret; |
a0e93eeb CS |
4089 | |
4090 | if (!c) | |
4091 | return -1; | |
4092 | ||
d6430143 CB |
4093 | command.program = (char *)program; |
4094 | command.argv = (char **)argv; | |
a73846d8 | 4095 | |
d6430143 CB |
4096 | ret = lxc_attach(c, lxc_attach_run_command, &command, options, &pid); |
4097 | if (ret < 0) | |
4098 | return ret; | |
a73846d8 | 4099 | |
a0e93eeb CS |
4100 | return lxc_wait_for_pid_status(pid); |
4101 | } | |
4102 | ||
d6430143 CB |
4103 | static int lxcapi_attach_run_wait(struct lxc_container *c, |
4104 | lxc_attach_options_t *options, | |
4105 | const char *program, const char *const argv[]) | |
858377e4 SH |
4106 | { |
4107 | int ret; | |
a73846d8 | 4108 | |
858377e4 SH |
4109 | current_config = c ? c->lxc_conf : NULL; |
4110 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4111 | current_config = NULL; | |
a73846d8 | 4112 | |
858377e4 SH |
4113 | return ret; |
4114 | } | |
4115 | ||
74a3920a | 4116 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 | 4117 | { |
7a99b5a0 | 4118 | __do_free char *fname = NULL; |
f5dd1d53 SH |
4119 | struct stat sb; |
4120 | int i = 0, ret; | |
4121 | ||
f5849fd7 | 4122 | fname = must_realloc(NULL, strlen(lxcpath) + 20); |
a73846d8 | 4123 | |
51a8a74c | 4124 | for (;;) { |
f5dd1d53 | 4125 | sprintf(fname, "%s/snap%d", lxcpath, i); |
a73846d8 | 4126 | |
f5dd1d53 SH |
4127 | ret = stat(fname, &sb); |
4128 | if (ret != 0) | |
4129 | return i; | |
a73846d8 | 4130 | |
f5dd1d53 SH |
4131 | i++; |
4132 | } | |
4133 | } | |
4134 | ||
18aa217b SH |
4135 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4136 | { | |
4137 | int ret; | |
a73846d8 | 4138 | |
18aa217b SH |
4139 | /* |
4140 | * If the old style snapshot path exists, use it | |
4141 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4142 | */ | |
8a22c168 CB |
4143 | ret = snprintf(snappath, PATH_MAX, "%ssnaps", c->config_path); |
4144 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4145 | return false; |
a73846d8 | 4146 | |
18aa217b | 4147 | if (dir_exists(snappath)) { |
8a22c168 CB |
4148 | ret = snprintf(snappath, PATH_MAX, "%ssnaps/%s", c->config_path, c->name); |
4149 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4150 | return false; |
a73846d8 | 4151 | |
18aa217b SH |
4152 | return true; |
4153 | } | |
4154 | ||
4155 | /* | |
4156 | * Use the new style path | |
4157 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4158 | */ | |
8a22c168 CB |
4159 | ret = snprintf(snappath, PATH_MAX, "%s/%s/snaps", c->config_path, c->name); |
4160 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4161 | return false; |
a73846d8 | 4162 | |
18aa217b SH |
4163 | return true; |
4164 | } | |
4165 | ||
858377e4 | 4166 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 | 4167 | { |
f5849fd7 | 4168 | __do_free char *dfnam = NULL; |
f5dd1d53 | 4169 | int i, flags, ret; |
df05fa0f | 4170 | time_t timer; |
4171 | struct tm tm_info; | |
f5dd1d53 | 4172 | struct lxc_container *c2; |
8a22c168 | 4173 | char snappath[PATH_MAX], newname[20]; |
df05fa0f | 4174 | char buffer[25]; |
4175 | FILE *f; | |
f5dd1d53 | 4176 | |
840f05df SH |
4177 | if (!c || !lxcapi_is_defined(c)) |
4178 | return -1; | |
4179 | ||
10bc1861 | 4180 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4181 | ERROR("%s's backing store cannot be backed up", c->name); |
4182 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4183 | return -1; |
4184 | } | |
4185 | ||
18aa217b | 4186 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4187 | return -1; |
18aa217b | 4188 | |
f5dd1d53 SH |
4189 | i = get_next_index(snappath, c->name); |
4190 | ||
4191 | if (mkdir_p(snappath, 0755) < 0) { | |
4192 | ERROR("Failed to create snapshot directory %s", snappath); | |
4193 | return -1; | |
4194 | } | |
4195 | ||
4196 | ret = snprintf(newname, 20, "snap%d", i); | |
4197 | if (ret < 0 || ret >= 20) | |
4198 | return -1; | |
4199 | ||
0a83cbbb SH |
4200 | /* |
4201 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4202 | * created in the original container | |
4203 | */ | |
4204 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4205 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4206 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4207 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4208 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4209 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4210 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4211 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4212 | } | |
a73846d8 | 4213 | |
858377e4 | 4214 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4215 | if (!c2) { |
df05fa0f | 4216 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4217 | return -1; |
4218 | } | |
4219 | ||
4220 | lxc_container_put(c2); | |
4221 | ||
1a0e70ac | 4222 | /* Now write down the creation time. */ |
f5dd1d53 | 4223 | time(&timer); |
f5dd1d53 | 4224 | |
df05fa0f | 4225 | if (!localtime_r(&timer, &tm_info)) { |
4226 | ERROR("Failed to get localtime"); | |
4227 | return -1; | |
4228 | } | |
4229 | ||
4230 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 | 4231 | |
f5849fd7 | 4232 | dfnam = must_realloc(NULL, strlen(snappath) + strlen(newname) + 5); |
f5dd1d53 | 4233 | sprintf(dfnam, "%s/%s/ts", snappath, newname); |
025ed0f3 | 4234 | f = fopen(dfnam, "w"); |
f5dd1d53 | 4235 | if (!f) { |
959aee9c | 4236 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4237 | return -1; |
4238 | } | |
a73846d8 | 4239 | |
f5dd1d53 SH |
4240 | if (fprintf(f, "%s", buffer) < 0) { |
4241 | SYSERROR("Writing timestamp"); | |
4242 | fclose(f); | |
4243 | return -1; | |
4244 | } | |
a73846d8 | 4245 | |
025ed0f3 | 4246 | ret = fclose(f); |
025ed0f3 | 4247 | if (ret != 0) { |
f5dd1d53 SH |
4248 | SYSERROR("Writing timestamp"); |
4249 | return -1; | |
4250 | } | |
4251 | ||
4252 | if (commentfile) { | |
7a99b5a0 | 4253 | __do_free char *path = NULL; |
1a0e70ac | 4254 | /* $p / $name / comment \0 */ |
f5dd1d53 | 4255 | int len = strlen(snappath) + strlen(newname) + 10; |
a73846d8 | 4256 | |
f5849fd7 | 4257 | path = must_realloc(NULL, len); |
f5dd1d53 SH |
4258 | sprintf(path, "%s/%s/comment", snappath, newname); |
4259 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4260 | } | |
4261 | ||
4262 | return i; | |
4263 | } | |
4264 | ||
858377e4 SH |
4265 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4266 | ||
f5dd1d53 SH |
4267 | static void lxcsnap_free(struct lxc_snapshot *s) |
4268 | { | |
f10fad2f ME |
4269 | free(s->name); |
4270 | free(s->comment_pathname); | |
4271 | free(s->timestamp); | |
4272 | free(s->lxcpath); | |
f5dd1d53 SH |
4273 | } |
4274 | ||
4275 | static char *get_snapcomment_path(char* snappath, char *name) | |
4276 | { | |
1a0e70ac | 4277 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4278 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4279 | char *s = malloc(len); | |
4280 | ||
4281 | if (s) { | |
4282 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4283 | if (ret < 0 || ret >= len) { | |
4284 | free(s); | |
4285 | s = NULL; | |
4286 | } | |
4287 | } | |
a73846d8 | 4288 | |
f5dd1d53 SH |
4289 | return s; |
4290 | } | |
4291 | ||
4292 | static char *get_timestamp(char* snappath, char *name) | |
4293 | { | |
8a22c168 | 4294 | char path[PATH_MAX], *s = NULL; |
f5dd1d53 SH |
4295 | int ret, len; |
4296 | FILE *fin; | |
4297 | ||
8a22c168 CB |
4298 | ret = snprintf(path, PATH_MAX, "%s/%s/ts", snappath, name); |
4299 | if (ret < 0 || ret >= PATH_MAX) | |
f5dd1d53 | 4300 | return NULL; |
a73846d8 | 4301 | |
025ed0f3 | 4302 | fin = fopen(path, "r"); |
025ed0f3 | 4303 | if (!fin) |
f5dd1d53 | 4304 | return NULL; |
a73846d8 | 4305 | |
f5dd1d53 SH |
4306 | (void) fseek(fin, 0, SEEK_END); |
4307 | len = ftell(fin); | |
4308 | (void) fseek(fin, 0, SEEK_SET); | |
4309 | if (len > 0) { | |
4310 | s = malloc(len+1); | |
4311 | if (s) { | |
4312 | s[len] = '\0'; | |
4313 | if (fread(s, 1, len, fin) != len) { | |
4314 | SYSERROR("reading timestamp"); | |
4315 | free(s); | |
4316 | s = NULL; | |
4317 | } | |
4318 | } | |
4319 | } | |
a73846d8 | 4320 | |
f5dd1d53 SH |
4321 | fclose(fin); |
4322 | return s; | |
4323 | } | |
4324 | ||
858377e4 | 4325 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 | 4326 | { |
8a22c168 | 4327 | char snappath[PATH_MAX], path2[PATH_MAX]; |
18aa217b | 4328 | int count = 0, ret; |
74f96976 | 4329 | struct dirent *direntp; |
f5dd1d53 SH |
4330 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4331 | DIR *dir; | |
4332 | ||
4333 | if (!c || !lxcapi_is_defined(c)) | |
4334 | return -1; | |
c868b261 | 4335 | |
18aa217b | 4336 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4337 | ERROR("path name too long"); |
4338 | return -1; | |
4339 | } | |
a73846d8 | 4340 | |
025ed0f3 | 4341 | dir = opendir(snappath); |
025ed0f3 | 4342 | if (!dir) { |
a73846d8 | 4343 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4344 | return 0; |
4345 | } | |
4346 | ||
74f96976 | 4347 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4348 | if (!strcmp(direntp->d_name, ".")) |
4349 | continue; | |
4350 | ||
4351 | if (!strcmp(direntp->d_name, "..")) | |
4352 | continue; | |
4353 | ||
8a22c168 CB |
4354 | ret = snprintf(path2, PATH_MAX, "%s/%s/config", snappath, direntp->d_name); |
4355 | if (ret < 0 || ret >= PATH_MAX) { | |
f5dd1d53 SH |
4356 | ERROR("pathname too long"); |
4357 | goto out_free; | |
4358 | } | |
a73846d8 | 4359 | |
f5dd1d53 SH |
4360 | if (!file_exists(path2)) |
4361 | continue; | |
a73846d8 | 4362 | |
f5dd1d53 SH |
4363 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4364 | if (!nsnaps) { | |
4365 | SYSERROR("Out of memory"); | |
4366 | goto out_free; | |
4367 | } | |
a73846d8 | 4368 | |
f5dd1d53 SH |
4369 | snaps = nsnaps; |
4370 | snaps[count].free = lxcsnap_free; | |
4371 | snaps[count].name = strdup(direntp->d_name); | |
4372 | if (!snaps[count].name) | |
4373 | goto out_free; | |
a73846d8 | 4374 | |
f5dd1d53 SH |
4375 | snaps[count].lxcpath = strdup(snappath); |
4376 | if (!snaps[count].lxcpath) { | |
4377 | free(snaps[count].name); | |
4378 | goto out_free; | |
4379 | } | |
a73846d8 | 4380 | |
f5dd1d53 SH |
4381 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4382 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4383 | count++; | |
4384 | } | |
4385 | ||
4386 | if (closedir(dir)) | |
a73846d8 | 4387 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4388 | |
4389 | *ret_snaps = snaps; | |
4390 | return count; | |
4391 | ||
4392 | out_free: | |
4393 | if (snaps) { | |
4394 | int i; | |
a73846d8 | 4395 | |
f5dd1d53 SH |
4396 | for (i=0; i<count; i++) |
4397 | lxcsnap_free(&snaps[i]); | |
a73846d8 | 4398 | |
f5dd1d53 SH |
4399 | free(snaps); |
4400 | } | |
a73846d8 | 4401 | |
9baa57bd | 4402 | if (closedir(dir)) |
a73846d8 | 4403 | WARN("Failed to close directory"); |
4404 | ||
f5dd1d53 SH |
4405 | return -1; |
4406 | } | |
4407 | ||
858377e4 SH |
4408 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4409 | ||
4410 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 | 4411 | { |
8a22c168 | 4412 | char clonelxcpath[PATH_MAX]; |
18aa217b | 4413 | int flags = 0; |
f5dd1d53 | 4414 | struct lxc_container *snap, *rest; |
10bc1861 | 4415 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4416 | bool b = false; |
4417 | ||
4418 | if (!c || !c->name || !c->config_path) | |
4419 | return false; | |
4420 | ||
18aa217b SH |
4421 | if (has_fs_snapshots(c)) { |
4422 | ERROR("container rootfs has dependent snapshots"); | |
4423 | return false; | |
4424 | } | |
4425 | ||
8a388ed4 | 4426 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4427 | if (!bdev) { |
4428 | ERROR("Failed to find original backing store type"); | |
4429 | return false; | |
4430 | } | |
4431 | ||
17a367d8 CB |
4432 | /* For an overlay container the rootfs is considered immutable |
4433 | * and cannot be removed when restoring from a snapshot. We pass this | |
4434 | * internal flag along to communicate this to various parts of the | |
4435 | * codebase. | |
4436 | */ | |
4437 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4438 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4439 | ||
f5dd1d53 SH |
4440 | if (!newname) |
4441 | newname = c->name; | |
7e36f87e | 4442 | |
18aa217b | 4443 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4444 | storage_put(bdev); |
f5dd1d53 SH |
4445 | return false; |
4446 | } | |
1a0e70ac | 4447 | /* how should we lock this? */ |
f5dd1d53 SH |
4448 | |
4449 | snap = lxc_container_new(snapname, clonelxcpath); | |
4450 | if (!snap || !lxcapi_is_defined(snap)) { | |
4451 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4452 | |
17a367d8 CB |
4453 | if (snap) |
4454 | lxc_container_put(snap); | |
a73846d8 | 4455 | |
10bc1861 | 4456 | storage_put(bdev); |
f5dd1d53 SH |
4457 | return false; |
4458 | } | |
4459 | ||
17a367d8 CB |
4460 | if (!strcmp(c->name, newname)) { |
4461 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4462 | ERROR("Could not destroy existing container %s", newname); |
4463 | lxc_container_put(snap); | |
10bc1861 | 4464 | storage_put(bdev); |
7e36f87e ÇO |
4465 | return false; |
4466 | } | |
4467 | } | |
4468 | ||
de269ee8 SH |
4469 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4470 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4471 | |
4472 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4473 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4474 | |
09f6f8c4 CB |
4475 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4476 | NULL, 0, NULL); | |
10bc1861 | 4477 | storage_put(bdev); |
f5dd1d53 SH |
4478 | if (rest && lxcapi_is_defined(rest)) |
4479 | b = true; | |
a73846d8 | 4480 | |
f5dd1d53 SH |
4481 | if (rest) |
4482 | lxc_container_put(rest); | |
17a367d8 | 4483 | |
f5dd1d53 SH |
4484 | lxc_container_put(snap); |
4485 | return b; | |
4486 | } | |
4487 | ||
858377e4 SH |
4488 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4489 | ||
18aa217b | 4490 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4491 | { |
771d96b3 | 4492 | struct lxc_container *snap = NULL; |
18aa217b | 4493 | bool bret = false; |
771d96b3 ÇO |
4494 | |
4495 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4496 | if (!snap) { |
771d96b3 ÇO |
4497 | ERROR("Could not find snapshot %s", snapname); |
4498 | goto err; | |
4499 | } | |
4500 | ||
858377e4 | 4501 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4502 | ERROR("Could not destroy snapshot %s", snapname); |
4503 | goto err; | |
4504 | } | |
a73846d8 | 4505 | |
18aa217b | 4506 | bret = true; |
771d96b3 | 4507 | |
771d96b3 ÇO |
4508 | err: |
4509 | if (snap) | |
4510 | lxc_container_put(snap); | |
a73846d8 | 4511 | |
18aa217b SH |
4512 | return bret; |
4513 | } | |
4514 | ||
4515 | static bool remove_all_snapshots(const char *path) | |
4516 | { | |
4517 | DIR *dir; | |
74f96976 | 4518 | struct dirent *direntp; |
18aa217b SH |
4519 | bool bret = true; |
4520 | ||
4521 | dir = opendir(path); | |
4522 | if (!dir) { | |
4523 | SYSERROR("opendir on snapshot path %s", path); | |
4524 | return false; | |
4525 | } | |
a73846d8 | 4526 | |
74f96976 | 4527 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4528 | if (!strcmp(direntp->d_name, ".")) |
4529 | continue; | |
a73846d8 | 4530 | |
18aa217b SH |
4531 | if (!strcmp(direntp->d_name, "..")) |
4532 | continue; | |
a73846d8 | 4533 | |
18aa217b SH |
4534 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4535 | bret = false; | |
4536 | continue; | |
4537 | } | |
4538 | } | |
4539 | ||
4540 | closedir(dir); | |
4541 | ||
4542 | if (rmdir(path)) | |
4543 | SYSERROR("Error removing directory %s", path); | |
4544 | ||
4545 | return bret; | |
4546 | } | |
4547 | ||
858377e4 | 4548 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b | 4549 | { |
8a22c168 | 4550 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4551 | |
4552 | if (!c || !c->name || !c->config_path || !snapname) | |
4553 | return false; | |
4554 | ||
4555 | if (!get_snappath_dir(c, clonelxcpath)) | |
4556 | return false; | |
4557 | ||
4558 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4559 | } | |
4560 | ||
858377e4 SH |
4561 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4562 | ||
4563 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b | 4564 | { |
8a22c168 | 4565 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4566 | |
4567 | if (!c || !c->name || !c->config_path) | |
4568 | return false; | |
4569 | ||
4570 | if (!get_snappath_dir(c, clonelxcpath)) | |
4571 | return false; | |
4572 | ||
4573 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4574 | } |
4575 | ||
858377e4 SH |
4576 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4577 | ||
4578 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4579 | { |
5106ecd0 | 4580 | if (!c) |
4581 | return false; | |
4582 | ||
b494d2dd SH |
4583 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4584 | } | |
4585 | ||
858377e4 SH |
4586 | WRAP_API(bool, lxcapi_may_control) |
4587 | ||
d5aa23e6 | 4588 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4589 | struct stat *st) |
d5aa23e6 | 4590 | { |
b69dfc9f CB |
4591 | int ret; |
4592 | char *tmp; | |
4593 | pid_t pid; | |
8a22c168 | 4594 | char chrootpath[PATH_MAX]; |
d5aa23e6 | 4595 | char *directory_path = NULL; |
d5aa23e6 | 4596 | |
b69dfc9f CB |
4597 | pid = fork(); |
4598 | if (pid < 0) { | |
4599 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4600 | return false; |
4601 | } | |
b69dfc9f | 4602 | |
d5aa23e6 | 4603 | if (pid) { |
b69dfc9f CB |
4604 | ret = wait_for_pid(pid); |
4605 | if (ret != 0) { | |
4606 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4607 | return false; |
4608 | } | |
b69dfc9f | 4609 | |
d5aa23e6 SH |
4610 | return true; |
4611 | } | |
4612 | ||
4613 | /* prepare the path */ | |
8a22c168 CB |
4614 | ret = snprintf(chrootpath, PATH_MAX, "/proc/%d/root", init_pid); |
4615 | if (ret < 0 || ret >= PATH_MAX) | |
d5aa23e6 SH |
4616 | return false; |
4617 | ||
b69dfc9f CB |
4618 | ret = chroot(chrootpath); |
4619 | if (ret < 0) | |
a7764ce7 | 4620 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4621 | |
4622 | ret = chdir("/"); | |
4623 | if (ret < 0) | |
a7764ce7 | 4624 | _exit(EXIT_FAILURE); |
b69dfc9f | 4625 | |
d5aa23e6 | 4626 | /* remove path if it exists */ |
b69dfc9f CB |
4627 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4628 | if(ret == 0) { | |
4629 | ret = unlink(path); | |
c7d76c09 | 4630 | if (ret < 0) { |
6d1400b5 | 4631 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4632 | _exit(EXIT_FAILURE); |
c7d76c09 | 4633 | } |
d5aa23e6 | 4634 | } |
b69dfc9f | 4635 | |
d5aa23e6 | 4636 | if (!add) |
a7764ce7 | 4637 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4638 | |
4639 | /* create any missing directories */ | |
b69dfc9f CB |
4640 | tmp = strdup(path); |
4641 | if (!tmp) | |
a7764ce7 | 4642 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4643 | |
4644 | directory_path = dirname(tmp); | |
4645 | ret = mkdir_p(directory_path, 0755); | |
4646 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4647 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4648 | free(tmp); |
a7764ce7 | 4649 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4650 | } |
4651 | ||
4652 | /* create the device node */ | |
b69dfc9f CB |
4653 | ret = mknod(path, st->st_mode, st->st_rdev); |
4654 | free(tmp); | |
c7d76c09 | 4655 | if (ret < 0) { |
6d1400b5 | 4656 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4657 | _exit(EXIT_FAILURE); |
c7d76c09 | 4658 | } |
d5aa23e6 | 4659 | |
a7764ce7 | 4660 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4661 | } |
4662 | ||
f0ca2726 | 4663 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4664 | { |
4665 | int ret; | |
4666 | struct stat st; | |
238b3e5e | 4667 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4668 | const char *p; |
caab004f | 4669 | pid_t init_pid; |
a9a0ed90 ÇO |
4670 | |
4671 | /* make sure container is running */ | |
858377e4 | 4672 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4673 | ERROR("container is not running"); |
d5aa23e6 | 4674 | return false; |
a9a0ed90 ÇO |
4675 | } |
4676 | ||
4677 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4678 | p = dest_path ? dest_path : src_path; | |
4679 | ||
a9a0ed90 ÇO |
4680 | /* make sure we can access p */ |
4681 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4682 | return false; |
a9a0ed90 ÇO |
4683 | |
4684 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4685 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4686 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4687 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4688 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4689 | else |
d5aa23e6 | 4690 | return false; |
a9a0ed90 ÇO |
4691 | |
4692 | /* check snprintf return code */ | |
238b3e5e | 4693 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4694 | return false; |
a9a0ed90 | 4695 | |
caab004f TA |
4696 | init_pid = do_lxcapi_init_pid(c); |
4697 | if (init_pid < 0) { | |
4698 | ERROR("Failed to get init pid"); | |
4699 | return false; | |
4700 | } | |
4701 | ||
4702 | if (!do_add_remove_node(init_pid, p, add, &st)) | |
d5aa23e6 | 4703 | return false; |
a9a0ed90 | 4704 | |
d5aa23e6 | 4705 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4706 | if (add) { |
858377e4 | 4707 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4708 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4709 | return false; |
a9a0ed90 ÇO |
4710 | } |
4711 | } else { | |
858377e4 | 4712 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4713 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4714 | return false; |
a9a0ed90 ÇO |
4715 | } |
4716 | } | |
d5aa23e6 | 4717 | |
a9a0ed90 | 4718 | return true; |
a9a0ed90 ÇO |
4719 | } |
4720 | ||
858377e4 | 4721 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4722 | { |
e0010464 | 4723 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4724 | if (am_host_unpriv()) { |
238b3e5e | 4725 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4726 | return false; |
4727 | } | |
a73846d8 | 4728 | |
a9a0ed90 ÇO |
4729 | return add_remove_device_node(c, src_path, dest_path, true); |
4730 | } | |
4731 | ||
858377e4 SH |
4732 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4733 | ||
4734 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4735 | { |
e0010464 | 4736 | if (am_guest_unpriv()) { |
238b3e5e | 4737 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4738 | return false; |
4739 | } | |
a73846d8 | 4740 | |
a9a0ed90 ÇO |
4741 | return add_remove_device_node(c, src_path, dest_path, false); |
4742 | } | |
4743 | ||
858377e4 SH |
4744 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4745 | ||
c7d76c09 CB |
4746 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4747 | const char *ifname, | |
4748 | const char *dst_ifname) | |
e58fae8f | 4749 | { |
c7d76c09 | 4750 | pid_t init_pid; |
e58fae8f | 4751 | int ret = 0; |
c7d76c09 | 4752 | |
e0010464 | 4753 | if (am_guest_unpriv()) { |
238b3e5e | 4754 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4755 | return false; |
4756 | } | |
4757 | ||
4758 | if (!ifname) { | |
4759 | ERROR("No source interface name given"); | |
4760 | return false; | |
4761 | } | |
4762 | ||
4763 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4764 | if (ret > 0) { |
4765 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4766 | ret = lxc_netdev_down(ifname); |
4767 | if (ret) | |
4768 | goto err; | |
4769 | } | |
4770 | ||
c7d76c09 | 4771 | init_pid = do_lxcapi_init_pid(c); |
caab004f TA |
4772 | if (init_pid < 0) { |
4773 | ERROR("Failed to get init pid"); | |
4774 | goto err; | |
4775 | } | |
4776 | ||
c7d76c09 | 4777 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); |
e58fae8f DY |
4778 | if (ret) |
4779 | goto err; | |
4780 | ||
c7d76c09 | 4781 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4782 | return true; |
e5848d39 | 4783 | |
e58fae8f | 4784 | err: |
e58fae8f DY |
4785 | return false; |
4786 | } | |
4787 | ||
858377e4 SH |
4788 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4789 | ||
c7d76c09 CB |
4790 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4791 | const char *ifname, | |
4792 | const char *dst_ifname) | |
e58fae8f | 4793 | { |
c7d76c09 | 4794 | int ret; |
e58fae8f DY |
4795 | pid_t pid, pid_outside; |
4796 | ||
e0010464 SH |
4797 | /* |
4798 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4799 | * But for other types guest privilege suffices. | |
4800 | */ | |
4801 | if (am_guest_unpriv()) { | |
238b3e5e | 4802 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4803 | return false; |
4804 | } | |
4805 | ||
4806 | if (!ifname) { | |
4807 | ERROR("No source interface name given"); | |
4808 | return false; | |
4809 | } | |
4810 | ||
0059379f | 4811 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4812 | pid = fork(); |
4813 | if (pid < 0) { | |
c7d76c09 | 4814 | ERROR("Failed to fork"); |
e58fae8f DY |
4815 | return false; |
4816 | } | |
4817 | ||
1a0e70ac | 4818 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4819 | pid_t init_pid; |
4820 | ||
4821 | init_pid = do_lxcapi_init_pid(c); | |
caab004f TA |
4822 | if (init_pid < 0) { |
4823 | ERROR("Failed to get init pid"); | |
4824 | _exit(EXIT_FAILURE); | |
4825 | } | |
acbfeda8 CB |
4826 | if (!switch_to_ns(init_pid, "net")) { |
4827 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4828 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4829 | } |
4830 | ||
4831 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4832 | if (ret < 0) { |
4833 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4834 | _exit(EXIT_FAILURE); |
c7d76c09 | 4835 | } |
e58fae8f DY |
4836 | |
4837 | /* netdev of ifname is up. */ | |
4838 | if (ret) { | |
4839 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4840 | if (ret) { |
4841 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4842 | _exit(EXIT_FAILURE); |
c7d76c09 | 4843 | } |
e58fae8f DY |
4844 | } |
4845 | ||
4846 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4847 | /* -EINVAL means there is no netdev named as ifname. */ |
4848 | if (ret < 0) { | |
4849 | if (ret == -EINVAL) | |
4850 | ERROR("Network device \"%s\" not found", ifname); | |
4851 | else | |
4852 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4853 | |
8d7b6c25 | 4854 | _exit(EXIT_FAILURE); |
e58fae8f | 4855 | } |
c7d76c09 | 4856 | |
8d7b6c25 | 4857 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4858 | } |
4859 | ||
c7d76c09 CB |
4860 | ret = wait_for_pid(pid); |
4861 | if (ret != 0) | |
e58fae8f DY |
4862 | return false; |
4863 | ||
c7d76c09 | 4864 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4865 | return true; |
4866 | } | |
4867 | ||
858377e4 SH |
4868 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4869 | ||
aef3d51e TA |
4870 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4871 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4872 | { |
6b9be523 | 4873 | int ret = -1; |
2cb80427 | 4874 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4875 | uint64_t features_to_check = 0; |
85c50991 | 4876 | |
aef3d51e TA |
4877 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4878 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4879 | * to do anything special. | |
4880 | */ | |
4881 | if (size > sizeof(*opts)) { | |
4882 | unsigned char *addr; | |
4883 | unsigned char *end; | |
4884 | ||
4885 | addr = (void *)opts + sizeof(*opts); | |
4886 | end = (void *)opts + size; | |
a73846d8 | 4887 | |
4888 | for (; addr < end; addr++) | |
4889 | if (*addr) | |
aef3d51e | 4890 | return -E2BIG; |
85c50991 TA |
4891 | } |
4892 | ||
2cb80427 TA |
4893 | /* If the caller has a smaller struct, let's zero out the end for them |
4894 | * so we don't accidentally use bits of it that they didn't know about | |
4895 | * to initialize. | |
4896 | */ | |
4897 | if (size < sizeof(*opts)) { | |
4898 | valid_opts = malloc(sizeof(*opts)); | |
4899 | if (!valid_opts) | |
4900 | return -ENOMEM; | |
4901 | ||
4902 | memset(valid_opts, 0, sizeof(*opts)); | |
4903 | memcpy(valid_opts, opts, size); | |
4904 | } | |
4905 | ||
aef3d51e TA |
4906 | switch (cmd) { |
4907 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4908 | if (!do_lxcapi_is_running(c)) { |
4909 | ERROR("container is not running"); | |
6b9be523 | 4910 | goto on_error; |
7ad13c91 | 4911 | } |
a73846d8 | 4912 | |
2cb80427 | 4913 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4914 | break; |
4915 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4916 | if (!do_lxcapi_is_running(c)) { |
4917 | ERROR("container is not running"); | |
6b9be523 | 4918 | goto on_error; |
7ad13c91 | 4919 | } |
a73846d8 | 4920 | |
2cb80427 | 4921 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4922 | break; |
4923 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4924 | if (do_lxcapi_is_running(c)) { |
4925 | ERROR("container is already running"); | |
6b9be523 | 4926 | goto on_error; |
7ad13c91 | 4927 | } |
a73846d8 | 4928 | |
2cb80427 | 4929 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4930 | break; |
b5b12b9e AR |
4931 | case MIGRATE_FEATURE_CHECK: |
4932 | features_to_check = valid_opts->features_to_check; | |
4933 | ret = !__criu_check_feature(&features_to_check); | |
4934 | if (ret) { | |
4935 | /* Something went wrong. Let's let the caller | |
4936 | * know which feature checks failed. */ | |
4937 | valid_opts->features_to_check = features_to_check; | |
4938 | } | |
4939 | break; | |
aef3d51e TA |
4940 | default: |
4941 | ERROR("invalid migrate command %u", cmd); | |
4942 | ret = -EINVAL; | |
4943 | } | |
735f2c6e | 4944 | |
6b9be523 | 4945 | on_error: |
f686506d TA |
4946 | if (size < sizeof(*opts)) |
4947 | free(valid_opts); | |
4948 | ||
aef3d51e TA |
4949 | return ret; |
4950 | } | |
735f2c6e | 4951 | |
aef3d51e | 4952 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4953 | |
aef3d51e TA |
4954 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4955 | { | |
ebb088e1 AR |
4956 | struct migrate_opts opts; |
4957 | ||
4958 | memset(&opts, 0, sizeof(opts)); | |
4959 | ||
4960 | opts.directory = directory; | |
4961 | opts.stop = stop; | |
4962 | opts.verbose = verbose; | |
735f2c6e | 4963 | |
aef3d51e | 4964 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4965 | } |
4966 | ||
858377e4 SH |
4967 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4968 | ||
4969 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4970 | { |
ebb088e1 AR |
4971 | struct migrate_opts opts; |
4972 | ||
4973 | memset(&opts, 0, sizeof(opts)); | |
4974 | ||
4975 | opts.directory = directory; | |
4976 | opts.verbose = verbose; | |
c9d8f2ee | 4977 | |
aef3d51e | 4978 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4979 | } |
4980 | ||
858377e4 SH |
4981 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4982 | ||
1f5a90f9 CB |
4983 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4984 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4985 | { | |
4986 | char *dirdup, *destdirname; | |
4987 | int ret; | |
4988 | ||
4989 | dirdup = strdup(dest); | |
4990 | if (!dirdup) { | |
4991 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4992 | return -1; | |
4993 | } | |
4994 | destdirname = dirname(dirdup); | |
4995 | ||
4996 | ret = mkdir_p(destdirname, 0755); | |
4997 | if (ret < 0) { | |
4998 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4999 | free(dirdup); | |
5000 | return ret; | |
5001 | } | |
5002 | free(dirdup); | |
5003 | ||
5004 | (void)remove(dest); | |
5005 | ||
5006 | if (S_ISDIR(st_mode)) | |
5007 | ret = mkdir(dest, 0000); | |
5008 | else | |
5009 | ret = mknod(dest, S_IFREG | 0000, 0); | |
71521317 SG |
5010 | |
5011 | if (ret == 0) | |
5012 | TRACE("Created mount target \"%s\"", dest); | |
d8bc14a7 | 5013 | else if (ret < 0 && errno != EEXIST) { |
1f5a90f9 CB |
5014 | SYSERROR("Failed to create mount target \"%s\"", dest); |
5015 | return -1; | |
5016 | } | |
5017 | ||
5018 | return 0; | |
5019 | } | |
5020 | ||
3340f441 CB |
5021 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
5022 | const char *target, const char *filesystemtype, | |
5023 | unsigned long mountflags, const void *data, | |
5024 | struct lxc_mount *mnt) | |
5025 | { | |
29df56cd | 5026 | char *suff, *sret; |
8a22c168 | 5027 | char template[PATH_MAX], path[PATH_MAX]; |
29df56cd | 5028 | pid_t pid, init_pid; |
c6885c3f | 5029 | struct stat sb; |
ecce75a6 | 5030 | bool is_dir; |
29df56cd LT |
5031 | int ret = -1, fd = -EBADF; |
5032 | ||
5033 | if (!c || !c->lxc_conf) { | |
5034 | ERROR("Container or configuration is NULL"); | |
5035 | return -EINVAL; | |
5036 | } | |
5037 | ||
7a41e857 | 5038 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
5039 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
5040 | return -EINVAL; | |
5041 | } | |
29df56cd | 5042 | |
60534030 LT |
5043 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
5044 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
5045 | SYSERROR("Error writing shmounts tempdir name"); |
5046 | goto out; | |
5047 | } | |
5048 | ||
c6885c3f LT |
5049 | /* Create a temporary file / dir under the shared mountpoint */ |
5050 | if (!source || strcmp(source, "") == 0) { | |
5051 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
5052 | sb.st_mode = S_IFDIR; | |
5053 | } else { | |
5054 | ret = stat(source, &sb); | |
5055 | if (ret < 0) { | |
5056 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5057 | goto out; | |
5058 | } | |
5059 | } | |
5060 | ||
ecce75a6 CB |
5061 | is_dir = (S_ISDIR(sb.st_mode) != 0); |
5062 | if (is_dir) { | |
c6885c3f LT |
5063 | sret = mkdtemp(template); |
5064 | if (!sret) { | |
5065 | SYSERROR("Could not create shmounts temporary dir"); | |
5066 | goto out; | |
5067 | } | |
c6885c3f LT |
5068 | } else { |
5069 | fd = lxc_make_tmpfile(template, false); | |
5070 | if (fd < 0) { | |
5071 | SYSERROR("Could not create shmounts temporary file"); | |
5072 | goto out; | |
5073 | } | |
29df56cd LT |
5074 | } |
5075 | ||
5076 | /* Do the fork */ | |
5077 | pid = fork(); | |
5078 | if (pid < 0) { | |
5079 | SYSERROR("Could not fork"); | |
5080 | goto out; | |
5081 | } | |
5082 | ||
5083 | if (pid == 0) { | |
5084 | /* Do the mount */ | |
5085 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5086 | if (ret < 0) { | |
c6885c3f | 5087 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5088 | _exit(EXIT_FAILURE); |
5089 | } | |
3340f441 | 5090 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5091 | |
5092 | init_pid = do_lxcapi_init_pid(c); | |
5093 | if (init_pid < 0) { | |
5094 | ERROR("Failed to obtain container's init pid"); | |
5095 | _exit(EXIT_FAILURE); | |
5096 | } | |
5097 | ||
5098 | /* Enter the container namespaces */ | |
5099 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
4e5a9657 | 5100 | if (!switch_to_ns(init_pid, "user")) { |
29df56cd LT |
5101 | ERROR("Failed to enter user namespace"); |
5102 | _exit(EXIT_FAILURE); | |
5103 | } | |
4e5a9657 CB |
5104 | |
5105 | if (!lxc_switch_uid_gid(0, 0)) | |
5106 | _exit(EXIT_FAILURE); | |
29df56cd | 5107 | } |
3340f441 | 5108 | |
29df56cd LT |
5109 | if (!switch_to_ns(init_pid, "mnt")) { |
5110 | ERROR("Failed to enter mount namespace"); | |
5111 | _exit(EXIT_FAILURE); | |
5112 | } | |
5113 | ||
71521317 SG |
5114 | ret = create_mount_target(target, sb.st_mode); |
5115 | if (ret < 0) | |
5116 | _exit(EXIT_FAILURE); | |
c6885c3f | 5117 | |
29df56cd LT |
5118 | suff = strrchr(template, '/'); |
5119 | if (!suff) | |
1f77c35e | 5120 | goto cleanup_target_in_child; |
29df56cd | 5121 | |
60534030 LT |
5122 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5123 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd | 5124 | SYSERROR("Error writing container mountpoint name"); |
1f77c35e | 5125 | goto cleanup_target_in_child; |
29df56cd LT |
5126 | } |
5127 | ||
3340f441 | 5128 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5129 | if (ret < 0) { |
5130 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
1f77c35e | 5131 | goto cleanup_target_in_child; |
29df56cd | 5132 | } |
3340f441 | 5133 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5134 | |
5135 | _exit(EXIT_SUCCESS); | |
1f77c35e CB |
5136 | |
5137 | cleanup_target_in_child: | |
5138 | (void)remove(target); | |
5139 | _exit(EXIT_FAILURE); | |
29df56cd LT |
5140 | } |
5141 | ||
5142 | ret = wait_for_pid(pid); | |
1f77c35e CB |
5143 | if (ret < 0) |
5144 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5145 | else | |
5146 | ret = 0; | |
29df56cd | 5147 | |
1f77c35e CB |
5148 | if (umount2(template, MNT_DETACH)) |
5149 | SYSWARN("Failed to remove temporary mount \"%s\"", template); | |
29df56cd | 5150 | |
ecce75a6 CB |
5151 | if (is_dir) |
5152 | (void)rmdir(template); | |
5153 | else | |
5154 | (void)unlink(template); | |
29df56cd LT |
5155 | |
5156 | out: | |
5157 | if (fd >= 0) | |
5158 | close(fd); | |
3340f441 | 5159 | |
29df56cd LT |
5160 | return ret; |
5161 | } | |
5162 | ||
5163 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5164 | unsigned long, const void *, struct lxc_mount *) |
5165 | ||
5166 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5167 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5168 | { |
5169 | pid_t pid, init_pid; | |
5170 | int ret = -1; | |
5171 | ||
5172 | if (!c || !c->lxc_conf) { | |
5173 | ERROR("Container or configuration is NULL"); | |
5174 | return -EINVAL; | |
5175 | } | |
5176 | ||
5177 | /* Do the fork */ | |
5178 | pid = fork(); | |
5179 | if (pid < 0) { | |
5180 | SYSERROR("Could not fork"); | |
5181 | return -1; | |
5182 | } | |
5183 | ||
5184 | if (pid == 0) { | |
5185 | init_pid = do_lxcapi_init_pid(c); | |
5186 | if (init_pid < 0) { | |
5187 | ERROR("Failed to obtain container's init pid"); | |
5188 | _exit(EXIT_FAILURE); | |
5189 | } | |
5190 | ||
5191 | /* Enter the container namespaces */ | |
5192 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5193 | if (!switch_to_ns(init_pid, "user")) { | |
5194 | ERROR("Failed to enter user namespace"); | |
5195 | _exit(EXIT_FAILURE); | |
5196 | } | |
5197 | } | |
5198 | ||
5199 | if (!switch_to_ns(init_pid, "mnt")) { | |
5200 | ERROR("Failed to enter mount namespace"); | |
5201 | _exit(EXIT_FAILURE); | |
5202 | } | |
5203 | ||
5204 | /* Do the unmount */ | |
7a41e857 | 5205 | ret = umount2(target, flags); |
d83da817 LT |
5206 | if (ret < 0) { |
5207 | SYSERROR("Failed to umount \"%s\"", target); | |
5208 | _exit(EXIT_FAILURE); | |
5209 | } | |
5210 | ||
5211 | _exit(EXIT_SUCCESS); | |
5212 | } | |
5213 | ||
5214 | ret = wait_for_pid(pid); | |
5215 | if (ret < 0) { | |
5216 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5217 | return -ret; | |
5218 | } | |
5219 | ||
5220 | return 0; | |
5221 | } | |
5222 | ||
5223 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5224 | |
a0e93eeb CS |
5225 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5226 | { | |
5227 | va_list ap; | |
5228 | const char **argv; | |
5229 | int ret; | |
5230 | ||
5231 | if (!c) | |
5232 | return -1; | |
5233 | ||
858377e4 SH |
5234 | current_config = c->lxc_conf; |
5235 | ||
a0e93eeb CS |
5236 | va_start(ap, arg); |
5237 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5238 | va_end(ap); | |
5239 | ||
5240 | if (!argv) { | |
5241 | ERROR("Memory allocation error."); | |
858377e4 SH |
5242 | ret = -1; |
5243 | goto out; | |
a0e93eeb CS |
5244 | } |
5245 | argv[0] = arg; | |
5246 | ||
858377e4 | 5247 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5248 | free((void*)argv); |
a73846d8 | 5249 | |
858377e4 SH |
5250 | out: |
5251 | current_config = NULL; | |
a0e93eeb CS |
5252 | return ret; |
5253 | } | |
5254 | ||
679289bf | 5255 | static int do_lxcapi_seccomp_notify_fd(struct lxc_container *c) |
cdb2a47f | 5256 | { |
cdb2a47f CB |
5257 | if (!c || !c->lxc_conf) |
5258 | return minus_one_set_errno(-EINVAL); | |
5259 | ||
679289bf | 5260 | return lxc_seccomp_get_notify_fd(&c->lxc_conf->seccomp); |
cdb2a47f CB |
5261 | } |
5262 | ||
679289bf | 5263 | WRAP_API(int, lxcapi_seccomp_notify_fd) |
cdb2a47f | 5264 | |
afeecbba | 5265 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5266 | { |
5267 | struct lxc_container *c; | |
cbb9c7c7 | 5268 | size_t len; |
9fbe07f6 | 5269 | int rc; |
72d0e1cb | 5270 | |
18aa217b SH |
5271 | if (!name) |
5272 | return NULL; | |
5273 | ||
72d0e1cb SG |
5274 | c = malloc(sizeof(*c)); |
5275 | if (!c) { | |
e9e29a33 | 5276 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5277 | return NULL; |
5278 | } | |
5279 | memset(c, 0, sizeof(*c)); | |
5280 | ||
afeecbba SH |
5281 | if (configpath) |
5282 | c->config_path = strdup(configpath); | |
5283 | else | |
593e8478 | 5284 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5285 | if (!c->config_path) { |
e9e29a33 | 5286 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5287 | goto err; |
5288 | } | |
5289 | ||
f5dd1d53 | 5290 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5291 | |
5292 | len = strlen(name); | |
5293 | c->name = malloc(len + 1); | |
72d0e1cb | 5294 | if (!c->name) { |
e9e29a33 | 5295 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5296 | goto err; |
5297 | } | |
cbb9c7c7 | 5298 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5299 | |
5300 | c->numthreads = 1; | |
e9e29a33 CB |
5301 | c->slock = lxc_newlock(c->config_path, name); |
5302 | if (!c->slock) { | |
5303 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5304 | goto err; |
5305 | } | |
5306 | ||
e9e29a33 CB |
5307 | c->privlock = lxc_newlock(NULL, NULL); |
5308 | if (!c->privlock) { | |
5309 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5310 | goto err; |
5311 | } | |
5312 | ||
afeecbba | 5313 | if (!set_config_filename(c)) { |
e9e29a33 | 5314 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5315 | goto err; |
5316 | } | |
72d0e1cb | 5317 | |
e9e29a33 CB |
5318 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5319 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5320 | goto err; |
e9e29a33 | 5321 | } |
72d0e1cb | 5322 | |
9fbe07f6 RK |
5323 | rc = ongoing_create(c); |
5324 | switch (rc) { | |
5325 | case LXC_CREATE_INCOMPLETE: | |
5326 | SYSERROR("Failed to complete container creation for %s", c->name); | |
17a367d8 | 5327 | container_destroy(c, NULL); |
4df7f012 | 5328 | lxcapi_clear_config(c); |
9fbe07f6 RK |
5329 | break; |
5330 | case LXC_CREATE_ONGOING: | |
5331 | /* container creation going on */ | |
5332 | break; | |
5333 | case LXC_CREATE_FAILED: | |
5334 | /* container creation failed */ | |
5335 | if (errno != EACCES && errno != EPERM) { | |
5336 | /* insufficient privileges */ | |
5337 | SYSERROR("Failed checking for incomplete container %s creation", c->name); | |
5338 | goto err; | |
5339 | } | |
5340 | break; | |
3e625e2d | 5341 | } |
a73846d8 | 5342 | |
a2739df5 | 5343 | c->daemonize = true; |
72cf75fa | 5344 | c->pidfile = NULL; |
3e625e2d | 5345 | |
1a0e70ac | 5346 | /* Assign the member functions. */ |
72d0e1cb SG |
5347 | c->is_defined = lxcapi_is_defined; |
5348 | c->state = lxcapi_state; | |
5349 | c->is_running = lxcapi_is_running; | |
5350 | c->freeze = lxcapi_freeze; | |
5351 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5352 | c->console = lxcapi_console; |
b5159817 | 5353 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5354 | c->init_pid = lxcapi_init_pid; |
5355 | c->load_config = lxcapi_load_config; | |
5356 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5357 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5358 | c->start = lxcapi_start; |
5359 | c->startl = lxcapi_startl; | |
5360 | c->stop = lxcapi_stop; | |
5361 | c->config_file_name = lxcapi_config_file_name; | |
5362 | c->wait = lxcapi_wait; | |
5363 | c->set_config_item = lxcapi_set_config_item; | |
5364 | c->destroy = lxcapi_destroy; | |
18aa217b | 5365 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5366 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5367 | c->save_config = lxcapi_save_config; |
5368 | c->get_keys = lxcapi_get_keys; | |
5369 | c->create = lxcapi_create; | |
5370 | c->createl = lxcapi_createl; | |
5371 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5372 | c->reboot = lxcapi_reboot; |
d39b10eb | 5373 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5374 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5375 | c->clear_config_item = lxcapi_clear_config_item; |
5376 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5377 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5378 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5379 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5380 | c->get_config_path = lxcapi_get_config_path; |
5381 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5382 | c->clone = lxcapi_clone; |
799f29ab | 5383 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5384 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5385 | c->attach = lxcapi_attach; |
5386 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5387 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5388 | c->snapshot = lxcapi_snapshot; |
5389 | c->snapshot_list = lxcapi_snapshot_list; | |
5390 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5391 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5392 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5393 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5394 | c->add_device_node = lxcapi_add_device_node; |
5395 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5396 | c->attach_interface = lxcapi_attach_interface; |
5397 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5398 | c->checkpoint = lxcapi_checkpoint; |
5399 | c->restore = lxcapi_restore; | |
aef3d51e | 5400 | c->migrate = lxcapi_migrate; |
191d43cc | 5401 | c->console_log = lxcapi_console_log; |
29df56cd | 5402 | c->mount = lxcapi_mount; |
d83da817 | 5403 | c->umount = lxcapi_umount; |
679289bf | 5404 | c->seccomp_notify_fd = lxcapi_seccomp_notify_fd; |
72d0e1cb | 5405 | |
72d0e1cb SG |
5406 | return c; |
5407 | ||
5408 | err: | |
5409 | lxc_container_free(c); | |
5410 | return NULL; | |
5411 | } | |
5412 | ||
4a7c7daa | 5413 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5414 | { |
5415 | int i; | |
5416 | ||
5417 | if (states) | |
5418 | for (i=0; i<MAX_STATE; i++) | |
5419 | states[i] = lxc_state2str(i); | |
a73846d8 | 5420 | |
72d0e1cb SG |
5421 | return MAX_STATE; |
5422 | } | |
a41f104b | 5423 | |
a41f104b SH |
5424 | /* |
5425 | * These next two could probably be done smarter with reusing a common function | |
5426 | * with different iterators and tests... | |
5427 | */ | |
5428 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5429 | { | |
5430 | DIR *dir; | |
5431 | int i, cfound = 0, nfound = 0; | |
74f96976 | 5432 | struct dirent *direntp; |
a41f104b SH |
5433 | struct lxc_container *c; |
5434 | ||
5435 | if (!lxcpath) | |
593e8478 | 5436 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5437 | |
a41f104b | 5438 | dir = opendir(lxcpath); |
a41f104b SH |
5439 | if (!dir) { |
5440 | SYSERROR("opendir on lxcpath"); | |
5441 | return -1; | |
5442 | } | |
5443 | ||
5444 | if (cret) | |
5445 | *cret = NULL; | |
a73846d8 | 5446 | |
a41f104b SH |
5447 | if (names) |
5448 | *names = NULL; | |
5449 | ||
74f96976 | 5450 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5451 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5452 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5453 | continue; |
5454 | ||
5455 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5456 | continue; | |
5457 | ||
a73846d8 | 5458 | if (names) |
9c88ff1f | 5459 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5460 | goto free_bad; |
a73846d8 | 5461 | |
a41f104b SH |
5462 | cfound++; |
5463 | ||
5464 | if (!cret) { | |
5465 | nfound++; | |
5466 | continue; | |
5467 | } | |
5468 | ||
5469 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5470 | if (!c) { | |
5471 | INFO("Container %s:%s has a config but could not be loaded", | |
5472 | lxcpath, direntp->d_name); | |
a73846d8 | 5473 | |
a41f104b | 5474 | if (names) |
9c88ff1f ÇO |
5475 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5476 | goto free_bad; | |
a73846d8 | 5477 | |
a41f104b SH |
5478 | continue; |
5479 | } | |
a73846d8 | 5480 | |
858377e4 | 5481 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5482 | INFO("Container %s:%s has a config but is not defined", |
5483 | lxcpath, direntp->d_name); | |
a73846d8 | 5484 | |
a41f104b | 5485 | if (names) |
9c88ff1f ÇO |
5486 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5487 | goto free_bad; | |
a73846d8 | 5488 | |
a41f104b SH |
5489 | lxc_container_put(c); |
5490 | continue; | |
5491 | } | |
5492 | ||
2871830a | 5493 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5494 | lxc_container_put(c); |
5495 | goto free_bad; | |
5496 | } | |
a73846d8 | 5497 | |
a41f104b SH |
5498 | nfound++; |
5499 | } | |
5500 | ||
a41f104b | 5501 | closedir(dir); |
a41f104b SH |
5502 | return nfound; |
5503 | ||
5504 | free_bad: | |
5505 | if (names && *names) { | |
5506 | for (i=0; i<cfound; i++) | |
5507 | free((*names)[i]); | |
5508 | free(*names); | |
5509 | } | |
a73846d8 | 5510 | |
a41f104b SH |
5511 | if (cret && *cret) { |
5512 | for (i=0; i<nfound; i++) | |
5513 | lxc_container_put((*cret)[i]); | |
5514 | free(*cret); | |
5515 | } | |
a73846d8 | 5516 | |
a41f104b | 5517 | closedir(dir); |
a41f104b SH |
5518 | return -1; |
5519 | } | |
5520 | ||
148a9d27 DE |
5521 | int list_active_containers(const char *lxcpath, char ***nret, |
5522 | struct lxc_container ***cret) | |
a41f104b | 5523 | { |
148a9d27 | 5524 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5525 | int lxcpath_len; |
5526 | char *line = NULL; | |
148a9d27 | 5527 | char **ct_name = NULL; |
a41f104b | 5528 | size_t len = 0; |
97bc2422 | 5529 | struct lxc_container *c = NULL; |
88556fd7 | 5530 | bool is_hashed; |
a41f104b SH |
5531 | |
5532 | if (!lxcpath) | |
593e8478 | 5533 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5534 | lxcpath_len = strlen(lxcpath); |
5535 | ||
5536 | if (cret) | |
5537 | *cret = NULL; | |
a73846d8 | 5538 | |
148a9d27 DE |
5539 | if (nret) |
5540 | *nret = NULL; | |
a41f104b | 5541 | |
a41f104b | 5542 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
5543 | if (!f) |
5544 | return -1; | |
5545 | ||
5546 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5547 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5548 | if (!p) |
5549 | continue; | |
5550 | p++; | |
a73846d8 | 5551 | |
a41f104b SH |
5552 | if (*p != 0x40) |
5553 | continue; | |
5554 | p++; | |
88556fd7 ÇO |
5555 | |
5556 | is_hashed = false; | |
a73846d8 | 5557 | |
88556fd7 ÇO |
5558 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5559 | p += lxcpath_len; | |
5560 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5561 | p += 4; | |
5562 | is_hashed = true; | |
5563 | } else { | |
a41f104b | 5564 | continue; |
88556fd7 ÇO |
5565 | } |
5566 | ||
a41f104b SH |
5567 | while (*p == '/') |
5568 | p++; | |
5569 | ||
1a0e70ac | 5570 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5571 | p2 = strchr(p, '/'); |
a41f104b SH |
5572 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5573 | continue; | |
5574 | *p2 = '\0'; | |
5575 | ||
88556fd7 | 5576 | if (is_hashed) { |
899a9f55 CB |
5577 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5578 | if (!recvpath) | |
5579 | continue; | |
a73846d8 | 5580 | |
e07eafa8 L |
5581 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5582 | free(recvpath); | |
88556fd7 | 5583 | continue; |
e07eafa8 L |
5584 | } |
5585 | free(recvpath); | |
a73846d8 | 5586 | |
88556fd7 | 5587 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5588 | if (!p) |
5589 | continue; | |
88556fd7 ÇO |
5590 | } |
5591 | ||
e07eafa8 L |
5592 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5593 | if (is_hashed) | |
5594 | free(p); | |
9c88ff1f | 5595 | continue; |
e07eafa8 | 5596 | } |
9c88ff1f | 5597 | |
e07eafa8 L |
5598 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5599 | if (is_hashed) | |
5600 | free(p); | |
148a9d27 | 5601 | goto free_cret_list; |
e07eafa8 | 5602 | } |
9c88ff1f | 5603 | |
148a9d27 | 5604 | ct_name_cnt++; |
a41f104b | 5605 | |
e07eafa8 L |
5606 | if (!cret) { |
5607 | if (is_hashed) | |
5608 | free(p); | |
a41f104b | 5609 | continue; |
e07eafa8 | 5610 | } |
a41f104b SH |
5611 | |
5612 | c = lxc_container_new(p, lxcpath); | |
5613 | if (!c) { | |
5614 | INFO("Container %s:%s is running but could not be loaded", | |
5615 | lxcpath, p); | |
a73846d8 | 5616 | |
148a9d27 | 5617 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5618 | if (is_hashed) |
5619 | free(p); | |
a73846d8 | 5620 | |
a41f104b SH |
5621 | continue; |
5622 | } | |
5623 | ||
e07eafa8 L |
5624 | if (is_hashed) |
5625 | free(p); | |
5626 | ||
a41f104b SH |
5627 | /* |
5628 | * If this is an anonymous container, then is_defined *can* | |
5629 | * return false. So we don't do that check. Count on the | |
5630 | * fact that the command socket exists. | |
5631 | */ | |
5632 | ||
148a9d27 | 5633 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5634 | lxc_container_put(c); |
148a9d27 | 5635 | goto free_cret_list; |
a41f104b | 5636 | } |
a73846d8 | 5637 | |
148a9d27 | 5638 | cret_cnt++; |
a41f104b SH |
5639 | } |
5640 | ||
97bc2422 CB |
5641 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5642 | if (c) | |
5643 | lxc_container_put(c); | |
5644 | goto free_cret_list; | |
5645 | } | |
5646 | ||
148a9d27 DE |
5647 | ret = ct_name_cnt; |
5648 | if (nret) | |
5649 | *nret = ct_name; | |
5650 | else | |
5651 | goto free_ct_name; | |
a73846d8 | 5652 | |
148a9d27 | 5653 | goto out; |
a41f104b | 5654 | |
148a9d27 | 5655 | free_cret_list: |
a41f104b | 5656 | if (cret && *cret) { |
148a9d27 | 5657 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5658 | lxc_container_put((*cret)[i]); |
5659 | free(*cret); | |
5660 | } | |
148a9d27 DE |
5661 | |
5662 | free_ct_name: | |
5663 | if (ct_name) { | |
5664 | for (i = 0; i < ct_name_cnt; i++) | |
5665 | free(ct_name[i]); | |
5666 | free(ct_name); | |
5667 | } | |
5668 | ||
5669 | out: | |
f10fad2f | 5670 | free(line); |
a41f104b | 5671 | fclose(f); |
148a9d27 | 5672 | return ret; |
a41f104b | 5673 | } |
2871830a DE |
5674 | |
5675 | int list_all_containers(const char *lxcpath, char ***nret, | |
5676 | struct lxc_container ***cret) | |
5677 | { | |
5678 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5679 | char **active_name; | |
5680 | char **ct_name; | |
5681 | struct lxc_container **ct_list = NULL; | |
5682 | ||
5683 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5684 | if (ct_cnt < 0) | |
5685 | return ct_cnt; | |
5686 | ||
5687 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5688 | if (active_cnt < 0) { | |
5689 | ret = active_cnt; | |
5690 | goto free_ct_name; | |
5691 | } | |
5692 | ||
5693 | for (i = 0; i < active_cnt; i++) { | |
5694 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5695 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5696 | ret = -1; | |
5697 | goto free_active_name; | |
5698 | } | |
a73846d8 | 5699 | |
2871830a DE |
5700 | ct_cnt++; |
5701 | } | |
a73846d8 | 5702 | |
2871830a DE |
5703 | free(active_name[i]); |
5704 | active_name[i] = NULL; | |
5705 | } | |
a73846d8 | 5706 | |
2871830a DE |
5707 | free(active_name); |
5708 | active_name = NULL; | |
5709 | active_cnt = 0; | |
5710 | ||
5711 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5712 | struct lxc_container *c; | |
5713 | ||
5714 | c = lxc_container_new(ct_name[i], lxcpath); | |
5715 | if (!c) { | |
5716 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5717 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5718 | continue; | |
5719 | } | |
5720 | ||
5721 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5722 | lxc_container_put(c); | |
5723 | ret = -1; | |
5724 | goto free_ct_list; | |
5725 | } | |
a73846d8 | 5726 | |
2871830a DE |
5727 | ct_list_cnt++; |
5728 | } | |
5729 | ||
5730 | if (cret) | |
5731 | *cret = ct_list; | |
5732 | ||
a73846d8 | 5733 | if (nret) { |
2871830a | 5734 | *nret = ct_name; |
a73846d8 | 5735 | } else { |
2871830a DE |
5736 | ret = ct_cnt; |
5737 | goto free_ct_name; | |
5738 | } | |
a73846d8 | 5739 | |
2871830a DE |
5740 | return ct_cnt; |
5741 | ||
5742 | free_ct_list: | |
5743 | for (i = 0; i < ct_list_cnt; i++) { | |
5744 | lxc_container_put(ct_list[i]); | |
5745 | } | |
f10fad2f | 5746 | free(ct_list); |
2871830a DE |
5747 | |
5748 | free_active_name: | |
5749 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5750 | free(active_name[i]); |
2871830a | 5751 | } |
f10fad2f | 5752 | free(active_name); |
2871830a DE |
5753 | |
5754 | free_ct_name: | |
5755 | for (i = 0; i < ct_cnt; i++) { | |
5756 | free(ct_name[i]); | |
5757 | } | |
5758 | free(ct_name); | |
5759 | return ret; | |
5760 | } | |
12461428 CB |
5761 | |
5762 | bool lxc_config_item_is_supported(const char *key) | |
5763 | { | |
300df83e | 5764 | return !!lxc_get_config(key); |
12461428 | 5765 | } |
aafa5f96 CB |
5766 | |
5767 | bool lxc_has_api_extension(const char *extension) | |
5768 | { | |
5769 | /* The NULL API extension is always present. :) */ | |
5770 | if (!extension) | |
5771 | return true; | |
5772 | ||
5773 | for (size_t i = 0; i < nr_api_extensions; i++) | |
5774 | if (strcmp(api_extensions[i], extension) == 0) | |
5775 | return true; | |
5776 | ||
5777 | return false; | |
5778 | } |