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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); |
f7ac4459 CB |
1307 | return NULL; |
1308 | } | |
cf3ef16d | 1309 | |
e9e29a33 CB |
1310 | /* If we are not root, chown the rootfs dir to root in the target user |
1311 | * namespace. | |
f7ac4459 | 1312 | */ |
e9e29a33 CB |
1313 | ret = geteuid(); |
1314 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1315 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1316 | if (ret < 0) { | |
1317 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1318 | suggest_default_idmap(); |
10bc1861 | 1319 | storage_put(bdev); |
cf3ef16d SH |
1320 | return NULL; |
1321 | } | |
1322 | } | |
1323 | ||
1897e3bc SH |
1324 | return bdev; |
1325 | } | |
1326 | ||
85e02f56 PR |
1327 | /* Strip path and return name of file for argv[0] passed to execvp */ |
1328 | static char *lxctemplatefilename(char *tpath) | |
72d0e1cb | 1329 | { |
47e55887 CB |
1330 | char *p; |
1331 | ||
85e02f56 PR |
1332 | p = tpath + strlen(tpath) - 1; |
1333 | while ( (p-1) >= tpath && *(p-1) != '/') | |
96b3cb40 | 1334 | p--; |
47e55887 | 1335 | |
96b3cb40 SH |
1336 | return p; |
1337 | } | |
72d0e1cb | 1338 | |
47e55887 CB |
1339 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1340 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1341 | { |
47e55887 | 1342 | int ret; |
96b3cb40 | 1343 | pid_t pid; |
72d0e1cb | 1344 | |
72d0e1cb | 1345 | if (!tpath) |
96b3cb40 | 1346 | return true; |
72d0e1cb SG |
1347 | |
1348 | pid = fork(); | |
1349 | if (pid < 0) { | |
7e34710e | 1350 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1351 | return false; |
72d0e1cb SG |
1352 | } |
1353 | ||
1a0e70ac | 1354 | if (pid == 0) { /* child */ |
47e55887 CB |
1355 | int i, len; |
1356 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1357 | char **newargv; |
47e55887 CB |
1358 | int nargs = 0; |
1359 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1360 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1361 | uid_t euid; |
72d0e1cb | 1362 | |
47e55887 CB |
1363 | if (need_null_stdfds) { |
1364 | ret = null_stdfds(); | |
1365 | if (ret < 0) | |
1366 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1367 | } |
1897e3bc | 1368 | |
8a388ed4 | 1369 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1370 | if (!bdev) { |
47e55887 | 1371 | ERROR("Failed to initialize storage"); |
7e34710e | 1372 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1373 | } |
1374 | ||
47e55887 CB |
1375 | euid = geteuid(); |
1376 | if (euid == 0) { | |
1377 | ret = unshare(CLONE_NEWNS); | |
1378 | if (ret < 0) { | |
1379 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1380 | _exit(EXIT_FAILURE); |
cf3ef16d | 1381 | } |
47e55887 CB |
1382 | |
1383 | ret = detect_shared_rootfs(); | |
1384 | if (ret == 1) { | |
1385 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1386 | if (ret < 0) { | |
1387 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1388 | ERROR("Continuing..."); |
1389 | } | |
1390 | } | |
1391 | } | |
47e55887 CB |
1392 | |
1393 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1394 | if (euid != 0) { | |
1395 | ERROR("Unprivileged users can only create " | |
1396 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1397 | _exit(EXIT_FAILURE); |
4de2791f | 1398 | } |
241978fa | 1399 | |
47e55887 CB |
1400 | if (strcmp(bdev->type, "overlay") == 0 || |
1401 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1402 | /* If we create an overlay container we need to |
1403 | * rsync the contents into | |
1404 | * <container-path>/<container-name>/rootfs. | |
1405 | * However, the overlay mount function will | |
1406 | * mount will mount | |
1407 | * <container-path>/<container-name>/delta0 | |
1408 | * over | |
1409 | * <container-path>/<container-name>/rootfs | |
1410 | * which means we would rsync the rootfs into | |
1411 | * the delta directory. That doesn't make sense | |
1412 | * since the delta directory only exists to | |
1413 | * record the differences to | |
1414 | * <container-path>/<container-name>/rootfs. So | |
1415 | * let's simply bind-mount here and then rsync | |
1416 | * directly into | |
1417 | * <container-path>/<container-name>/rootfs. | |
1418 | */ | |
1419 | char *src; | |
1420 | ||
1421 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1422 | if (!src) { | |
1423 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1424 | _exit(EXIT_FAILURE); |
241978fa CB |
1425 | } |
1426 | ||
1427 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1428 | if (ret < 0) { | |
1429 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1430 | _exit(EXIT_FAILURE); |
241978fa CB |
1431 | } |
1432 | } else { | |
47e55887 CB |
1433 | ret = bdev->ops->mount(bdev); |
1434 | if (ret < 0) { | |
241978fa | 1435 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1436 | _exit(EXIT_FAILURE); |
241978fa | 1437 | } |
cf3ef16d | 1438 | } |
1a0e70ac | 1439 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1440 | const char *src; |
f10fad2f | 1441 | free(bdev->dest); |
e9705550 CB |
1442 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1443 | bdev->dest = strdup(src); | |
1897e3bc SH |
1444 | } |
1445 | ||
47e55887 CB |
1446 | /* Create our new array, pre-pend the template name and base |
1447 | * args. | |
72d0e1cb SG |
1448 | */ |
1449 | if (argv) | |
a73846d8 | 1450 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1451 | ; |
a73846d8 | 1452 | |
47e55887 CB |
1453 | /* template, path, rootfs and name args */ |
1454 | nargs += 4; | |
cf3ef16d | 1455 | |
72d0e1cb SG |
1456 | newargv = malloc(nargs * sizeof(*newargv)); |
1457 | if (!newargv) | |
7e34710e | 1458 | _exit(EXIT_FAILURE); |
85e02f56 | 1459 | newargv[0] = lxctemplatefilename(tpath); |
72d0e1cb | 1460 | |
47e55887 | 1461 | /* --path */ |
2a59a681 | 1462 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1463 | patharg = malloc(len); |
1464 | if (!patharg) | |
7e34710e | 1465 | _exit(EXIT_FAILURE); |
a73846d8 | 1466 | |
2a59a681 | 1467 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1468 | if (ret < 0 || ret >= len) |
7e34710e | 1469 | _exit(EXIT_FAILURE); |
72d0e1cb | 1470 | newargv[1] = patharg; |
47e55887 CB |
1471 | |
1472 | /* --name */ | |
72d0e1cb SG |
1473 | len = strlen("--name=") + strlen(c->name) + 1; |
1474 | namearg = malloc(len); | |
1475 | if (!namearg) | |
7e34710e | 1476 | _exit(EXIT_FAILURE); |
a73846d8 | 1477 | |
72d0e1cb SG |
1478 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1479 | if (ret < 0 || ret >= len) | |
7e34710e | 1480 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1481 | newargv[2] = namearg; |
1482 | ||
47e55887 | 1483 | /* --rootfs */ |
1897e3bc SH |
1484 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1485 | rootfsarg = malloc(len); | |
1486 | if (!rootfsarg) | |
7e34710e | 1487 | _exit(EXIT_FAILURE); |
a73846d8 | 1488 | |
1897e3bc SH |
1489 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1490 | if (ret < 0 || ret >= len) | |
7e34710e | 1491 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1492 | newargv[3] = rootfsarg; |
1493 | ||
72d0e1cb SG |
1494 | /* add passed-in args */ |
1495 | if (argv) | |
1897e3bc | 1496 | for (i = 4; i < nargs; i++) |
47e55887 | 1497 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1498 | |
1499 | /* add trailing NULL */ | |
1500 | nargs++; | |
1501 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1502 | if (!newargv) | |
7e34710e | 1503 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1504 | newargv[nargs - 1] = NULL; |
1505 | ||
47e55887 CB |
1506 | /* If we're running the template in a mapped userns, then we |
1507 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1508 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1509 | * the mapped uid for our geteuid() | |
cf3ef16d | 1510 | */ |
0e6e3a41 | 1511 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1512 | int extraargs, hostuid_mapped, hostgid_mapped; |
1513 | char **n2; | |
1514 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1515 | struct lxc_list *it; |
1516 | struct id_map *map; | |
47e55887 | 1517 | int n2args = 1; |
cf3ef16d | 1518 | |
47e55887 CB |
1519 | n2 = malloc(n2args * sizeof(*n2)); |
1520 | if (!n2) | |
7e34710e | 1521 | _exit(EXIT_FAILURE); |
47e55887 | 1522 | |
cf3ef16d SH |
1523 | newargv[0] = tpath; |
1524 | tpath = "lxc-usernsexec"; | |
1525 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1526 | |
cf3ef16d SH |
1527 | lxc_list_for_each(it, &conf->id_map) { |
1528 | map = it->elem; | |
1529 | n2args += 2; | |
57d116ab | 1530 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1531 | if (!n2) |
7e34710e | 1532 | _exit(EXIT_FAILURE); |
47e55887 CB |
1533 | |
1534 | n2[n2args - 2] = "-m"; | |
1535 | n2[n2args - 1] = malloc(200); | |
1536 | if (!n2[n2args - 1]) | |
7e34710e | 1537 | _exit(EXIT_FAILURE); |
47e55887 CB |
1538 | |
1539 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1540 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1541 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1542 | if (ret < 0 || ret >= 200) |
7e34710e | 1543 | _exit(EXIT_FAILURE); |
cf3ef16d | 1544 | } |
47e55887 CB |
1545 | |
1546 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1547 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1548 | |
57d116ab | 1549 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1550 | if (!n2) |
7e34710e | 1551 | _exit(EXIT_FAILURE); |
47e55887 CB |
1552 | |
1553 | if (hostuid_mapped < 0) { | |
1554 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1555 | n2[n2args++] = "-m"; |
47e55887 CB |
1556 | if (hostuid_mapped < 0) { |
1557 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1558 | _exit(EXIT_FAILURE); |
cf3ef16d | 1559 | } |
47e55887 | 1560 | |
cf3ef16d | 1561 | n2[n2args++] = malloc(200); |
47e55887 | 1562 | if (!n2[n2args - 1]) { |
cf3ef16d | 1563 | SYSERROR("out of memory"); |
7e34710e | 1564 | _exit(EXIT_FAILURE); |
cf3ef16d | 1565 | } |
a73846d8 | 1566 | |
47e55887 CB |
1567 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1568 | hostuid_mapped, geteuid()); | |
1569 | if (ret < 0 || ret >= 200) | |
7e34710e | 1570 | _exit(EXIT_FAILURE); |
cf3ef16d | 1571 | } |
47e55887 CB |
1572 | |
1573 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1574 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1575 | |
2133f58c SH |
1576 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1577 | if (!n2) | |
7e34710e | 1578 | _exit(EXIT_FAILURE); |
47e55887 | 1579 | |
2133f58c | 1580 | if (hostgid_mapped < 0) { |
339efad9 | 1581 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1582 | n2[n2args++] = "-m"; |
1583 | if (hostgid_mapped < 0) { | |
47e55887 | 1584 | ERROR("Failed to find free gid to map"); |
7e34710e | 1585 | _exit(EXIT_FAILURE); |
2133f58c | 1586 | } |
47e55887 | 1587 | |
2133f58c | 1588 | n2[n2args++] = malloc(200); |
47e55887 | 1589 | if (!n2[n2args - 1]) { |
2133f58c | 1590 | SYSERROR("out of memory"); |
7e34710e | 1591 | _exit(EXIT_FAILURE); |
2133f58c | 1592 | } |
47e55887 CB |
1593 | |
1594 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1595 | hostgid_mapped, getegid()); | |
1596 | if (ret < 0 || ret >= 200) | |
7e34710e | 1597 | _exit(EXIT_FAILURE); |
2133f58c | 1598 | } |
a73846d8 | 1599 | |
cf3ef16d | 1600 | n2[n2args++] = "--"; |
a73846d8 | 1601 | |
cf3ef16d SH |
1602 | for (i = 0; i < nargs; i++) |
1603 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1604 | n2args += nargs; |
47e55887 CB |
1605 | |
1606 | /* Finally add "--mapped-uid $uid" to tell template what | |
1607 | * to chown cached images to. | |
1a0e70ac | 1608 | */ |
2133f58c | 1609 | n2args += 4; |
57d116ab | 1610 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1611 | if (!n2) |
7e34710e | 1612 | _exit(EXIT_FAILURE); |
47e55887 | 1613 | |
1a0e70ac | 1614 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1615 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1616 | |
1617 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1618 | if (ret < 0 || ret >= 20) { | |
1619 | free(newargv); | |
1620 | free(n2); | |
1621 | _exit(EXIT_FAILURE); | |
1622 | } | |
1623 | ||
47e55887 CB |
1624 | n2[n2args - 4] = txtuid; |
1625 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1626 | |
1f080b1d CB |
1627 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1628 | if (ret < 0 || ret >= 20) { | |
1629 | free(newargv); | |
1630 | free(n2); | |
1631 | _exit(EXIT_FAILURE); | |
1632 | } | |
4250ef64 | 1633 | |
47e55887 CB |
1634 | n2[n2args - 2] = txtgid; |
1635 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1636 | free(newargv); |
1637 | newargv = n2; | |
1638 | } | |
47e55887 | 1639 | |
cf3ef16d | 1640 | execvp(tpath, newargv); |
e9705550 | 1641 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1642 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1643 | } |
1644 | ||
47e55887 CB |
1645 | ret = wait_for_pid(pid); |
1646 | if (ret != 0) { | |
1647 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1648 | return false; |
1649 | } | |
1650 | ||
1651 | return true; | |
1652 | } | |
1653 | ||
74a3920a | 1654 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1655 | { |
1fd9bd50 | 1656 | long flen; |
630ac7c6 | 1657 | size_t len; |
b4569e93 | 1658 | char *contents; |
3ce74686 | 1659 | FILE *f; |
025ed0f3 | 1660 | int ret = -1; |
fa2bb6ba SH |
1661 | #if HAVE_OPENSSL |
1662 | int i, md_len = 0; | |
1663 | unsigned char md_value[EVP_MAX_MD_SIZE]; | |
b4569e93 | 1664 | char *tpath; |
52026772 | 1665 | #endif |
3ce74686 | 1666 | |
025ed0f3 | 1667 | f = fopen(path, "r"); |
025ed0f3 | 1668 | if (f == NULL) |
3ce74686 | 1669 | return false; |
025ed0f3 | 1670 | |
630ac7c6 CB |
1671 | ret = fseek(f, 0, SEEK_END); |
1672 | if (ret < 0) | |
025ed0f3 | 1673 | goto out_error; |
630ac7c6 CB |
1674 | |
1675 | ret = -1; | |
1676 | flen = ftell(f); | |
1677 | if (flen < 0) | |
025ed0f3 | 1678 | goto out_error; |
630ac7c6 CB |
1679 | |
1680 | ret = fseek(f, 0, SEEK_SET); | |
1681 | if (ret < 0) | |
025ed0f3 | 1682 | goto out_error; |
630ac7c6 CB |
1683 | |
1684 | ret = fseek(f, 0, SEEK_SET); | |
1685 | if (ret < 0) | |
1686 | goto out_error; | |
1687 | ||
1688 | ret = -1; | |
1689 | contents = malloc(flen + 1); | |
1690 | if (!contents) | |
025ed0f3 | 1691 | goto out_error; |
630ac7c6 CB |
1692 | |
1693 | len = fread(contents, 1, flen, f); | |
1694 | if (len != flen) | |
025ed0f3 SH |
1695 | goto out_free_contents; |
1696 | ||
3ce74686 | 1697 | contents[flen] = '\0'; |
a73846d8 | 1698 | |
025ed0f3 | 1699 | ret = fclose(f); |
025ed0f3 SH |
1700 | f = NULL; |
1701 | if (ret < 0) | |
1702 | goto out_free_contents; | |
3ce74686 | 1703 | |
fa2bb6ba | 1704 | #if HAVE_OPENSSL |
01efd4d3 | 1705 | tpath = get_template_path(t); |
85db5535 | 1706 | if (!tpath) { |
630ac7c6 | 1707 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1708 | goto out_free_contents; |
3ce74686 SH |
1709 | } |
1710 | ||
fa2bb6ba | 1711 | ret = sha1sum_file(tpath, md_value, &md_len); |
85db5535 | 1712 | if (ret < 0) { |
630ac7c6 | 1713 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1714 | free(tpath); |
85db5535 | 1715 | goto out_free_contents; |
3ce74686 | 1716 | } |
cef701ed | 1717 | free(tpath); |
3ce74686 SH |
1718 | #endif |
1719 | ||
025ed0f3 | 1720 | f = fopen(path, "w"); |
025ed0f3 | 1721 | if (f == NULL) { |
630ac7c6 | 1722 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1723 | free(contents); |
1724 | return false; | |
1725 | } | |
630ac7c6 | 1726 | |
3ce74686 SH |
1727 | fprintf(f, "# Template used to create this container: %s\n", t); |
1728 | if (argv) { | |
1729 | fprintf(f, "# Parameters passed to the template:"); | |
1730 | while (*argv) { | |
1731 | fprintf(f, " %s", *argv); | |
1732 | argv++; | |
1733 | } | |
1734 | fprintf(f, "\n"); | |
1735 | } | |
a73846d8 | 1736 | |
fa2bb6ba | 1737 | #if HAVE_OPENSSL |
56698177 | 1738 | fprintf(f, "# Template script checksum (SHA-1): "); |
fa2bb6ba | 1739 | for (i=0; i<md_len; i++) |
56698177 SH |
1740 | fprintf(f, "%02x", md_value[i]); |
1741 | fprintf(f, "\n"); | |
3ce74686 | 1742 | #endif |
0520c252 | 1743 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1744 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1745 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1746 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1747 | if (fwrite(contents, 1, flen, f) != flen) { |
1748 | SYSERROR("Writing original contents"); | |
1749 | free(contents); | |
1750 | fclose(f); | |
1751 | return false; | |
1752 | } | |
630ac7c6 | 1753 | |
025ed0f3 | 1754 | ret = 0; |
630ac7c6 | 1755 | |
025ed0f3 | 1756 | out_free_contents: |
3ce74686 | 1757 | free(contents); |
630ac7c6 | 1758 | |
025ed0f3 SH |
1759 | out_error: |
1760 | if (f) { | |
1761 | int newret; | |
025ed0f3 | 1762 | newret = fclose(f); |
025ed0f3 SH |
1763 | if (ret == 0) |
1764 | ret = newret; | |
1765 | } | |
630ac7c6 | 1766 | |
025ed0f3 SH |
1767 | if (ret < 0) { |
1768 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1769 | return false; |
1770 | } | |
630ac7c6 | 1771 | |
3ce74686 SH |
1772 | return true; |
1773 | } | |
1774 | ||
4df7f012 SH |
1775 | static void lxcapi_clear_config(struct lxc_container *c) |
1776 | { | |
e62fd16f CB |
1777 | if (!c || !c->lxc_conf) |
1778 | return; | |
1779 | ||
1780 | lxc_conf_free(c->lxc_conf); | |
1781 | c->lxc_conf = NULL; | |
4df7f012 SH |
1782 | } |
1783 | ||
858377e4 SH |
1784 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1785 | ||
96b3cb40 SH |
1786 | /* |
1787 | * lxcapi_create: | |
1788 | * create a container with the given parameters. | |
1789 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1790 | * configuration already set | |
1791 | * @t: the template to execute to instantiate the root filesystem and | |
1792 | * adjust the configuration. | |
1793 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1794 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1795 | * use. | |
1796 | * | |
1797 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1798 | * arguments, you can just pass NULL. | |
1799 | */ | |
858377e4 | 1800 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1801 | const char *bdevtype, struct bdev_specs *specs, |
1802 | int flags, char *const argv[]) | |
96b3cb40 | 1803 | { |
e9e29a33 | 1804 | int partial_fd; |
51f0f73b | 1805 | mode_t mask; |
96b3cb40 | 1806 | pid_t pid; |
92fa4347 | 1807 | bool ret = false, rootfs_managed = true; |
85db5535 | 1808 | char *tpath = NULL; |
96b3cb40 SH |
1809 | |
1810 | if (!c) | |
1811 | return false; | |
1812 | ||
85db5535 DE |
1813 | if (t) { |
1814 | tpath = get_template_path(t); | |
1815 | if (!tpath) { | |
e9e29a33 | 1816 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1817 | goto out; |
1818 | } | |
96b3cb40 SH |
1819 | } |
1820 | ||
e9e29a33 CB |
1821 | /* If a template is passed in, and the rootfs already is defined in the |
1822 | * container config and exists, then the caller is trying to create an | |
1823 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1824 | */ |
858377e4 | 1825 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1826 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1827 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1828 | c->config_path); | |
6c6892b5 | 1829 | goto free_tpath; |
cf465fe4 SH |
1830 | } |
1831 | ||
6c6892b5 | 1832 | if (!c->lxc_conf) { |
858377e4 | 1833 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1834 | ERROR("Error loading default configuration file %s", |
1835 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1836 | goto free_tpath; |
1837 | } | |
96b3cb40 SH |
1838 | } |
1839 | ||
6c6892b5 DE |
1840 | if (!create_container_dir(c)) |
1841 | goto free_tpath; | |
1842 | ||
92fa4347 CB |
1843 | if (c->lxc_conf->rootfs.path) |
1844 | rootfs_managed = false; | |
1845 | ||
e9e29a33 CB |
1846 | /* If both template and rootfs.path are set, template is setup as |
1847 | * rootfs.path. The container is already created if we have a config and | |
1848 | * rootfs.path is accessible | |
0590e82c | 1849 | */ |
00370edd | 1850 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1851 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1852 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1853 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1854 | goto out; |
1855 | } | |
1856 | ret = true; | |
0590e82c | 1857 | goto out; |
00370edd | 1858 | } |
e9e29a33 CB |
1859 | |
1860 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1861 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1862 | goto out; |
e9e29a33 | 1863 | |
858377e4 | 1864 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1865 | /* Rootfs already existed, user just wanted to save the loaded |
1866 | * configuration. | |
1867 | */ | |
0f4cdd77 | 1868 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1869 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1870 | |
0590e82c SH |
1871 | ret = true; |
1872 | goto out; | |
a69aad27 | 1873 | } |
96b3cb40 SH |
1874 | |
1875 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1876 | partial_fd = create_partial(c); |
1877 | if (partial_fd < 0) | |
96b3cb40 SH |
1878 | goto out; |
1879 | ||
e9e29a33 | 1880 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1881 | |
51f0f73b KR |
1882 | mask = umask(0022); |
1883 | ||
e9e29a33 | 1884 | /* Create the storage. |
96b3cb40 SH |
1885 | * Note we can't do this in the same task as we use to execute the |
1886 | * template because of the way zfs works. | |
1887 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1888 | * namespace. | |
1889 | */ | |
1890 | pid = fork(); | |
1891 | if (pid < 0) { | |
e9e29a33 | 1892 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1893 | goto out_unlock; |
1894 | } | |
1895 | ||
1a0e70ac | 1896 | if (pid == 0) { /* child */ |
10bc1861 | 1897 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1898 | |
10bc1861 CB |
1899 | bdev = do_storage_create(c, bdevtype, specs); |
1900 | if (!bdev) { | |
e9e29a33 CB |
1901 | ERROR("Failed to create %s storage for %s", |
1902 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1903 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1904 | } |
1905 | ||
e9e29a33 | 1906 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1907 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1908 | ERROR("Failed to save initial config for %s", c->name); |
1909 | /* Parent task won't see the storage driver in the | |
1910 | * config so we delete it. | |
1911 | */ | |
96b3cb40 SH |
1912 | bdev->ops->umount(bdev); |
1913 | bdev->ops->destroy(bdev); | |
85aec4ac | 1914 | _exit(EXIT_FAILURE); |
96b3cb40 | 1915 | } |
a73846d8 | 1916 | |
85aec4ac | 1917 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1918 | } |
a73846d8 | 1919 | |
96b3cb40 | 1920 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1921 | goto out_unlock; |
96b3cb40 | 1922 | |
e9e29a33 | 1923 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1924 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1925 | c->lxc_conf = NULL; |
a73846d8 | 1926 | |
96b3cb40 | 1927 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1928 | goto out_unlock; |
96b3cb40 | 1929 | |
dc23c1c8 | 1930 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1931 | goto out_unlock; |
1932 | ||
1a0e70ac CB |
1933 | /* Now clear out the lxc_conf we have, reload from the created |
1934 | * container. | |
1935 | */ | |
858377e4 | 1936 | do_lxcapi_clear_config(c); |
3ce74686 | 1937 | |
9d65a487 KY |
1938 | if (t) { |
1939 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1940 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1941 | goto out_unlock; |
1942 | } | |
3ce74686 | 1943 | } |
a73846d8 | 1944 | |
a69aad27 | 1945 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1946 | |
1947 | out_unlock: | |
51f0f73b | 1948 | umask(mask); |
b20e0599 | 1949 | remove_partial(c, partial_fd); |
a73846d8 | 1950 | |
72d0e1cb | 1951 | out: |
92fa4347 CB |
1952 | if (!ret) { |
1953 | bool reset_managed = c->lxc_conf->rootfs.managed; | |
1954 | ||
1955 | /* | |
1956 | * Ensure that we don't destroy storage we didn't create | |
1957 | * ourselves. | |
1958 | */ | |
1959 | if (!rootfs_managed) | |
1960 | c->lxc_conf->rootfs.managed = false; | |
17a367d8 | 1961 | container_destroy(c, NULL); |
92fa4347 CB |
1962 | c->lxc_conf->rootfs.managed = reset_managed; |
1963 | } | |
a73846d8 | 1964 | |
6c6892b5 | 1965 | free_tpath: |
f10fad2f | 1966 | free(tpath); |
a69aad27 | 1967 | return ret; |
72d0e1cb SG |
1968 | } |
1969 | ||
858377e4 | 1970 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1971 | const char *bdevtype, struct bdev_specs *specs, |
1972 | int flags, char *const argv[]) | |
858377e4 SH |
1973 | { |
1974 | bool ret; | |
a73846d8 | 1975 | |
858377e4 | 1976 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1977 | |
858377e4 SH |
1978 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1979 | current_config = NULL; | |
1980 | return ret; | |
1981 | } | |
1982 | ||
1983 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1984 | { |
9dd54153 | 1985 | int ret; |
3e625e2d | 1986 | pid_t pid; |
dd267776 | 1987 | int rebootsignal = SIGINT; |
3e625e2d SH |
1988 | |
1989 | if (!c) | |
1990 | return false; | |
9dd54153 | 1991 | |
858377e4 | 1992 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1993 | return false; |
9dd54153 | 1994 | |
858377e4 | 1995 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1996 | if (pid <= 0) |
1997 | return false; | |
9dd54153 | 1998 | |
dd267776 BP |
1999 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
2000 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
2001 | |
2002 | ret = kill(pid, rebootsignal); | |
2003 | if (ret < 0) { | |
2004 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 2005 | return false; |
591614a7 | 2006 | } |
3e625e2d | 2007 | |
9dd54153 | 2008 | return true; |
3e625e2d SH |
2009 | } |
2010 | ||
858377e4 SH |
2011 | WRAP_API(bool, lxcapi_reboot) |
2012 | ||
d39b10eb CB |
2013 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
2014 | { | |
2015 | int killret, ret; | |
2016 | pid_t pid; | |
2017 | int rebootsignal = SIGINT, state_client_fd = -1; | |
2018 | lxc_state_t states[MAX_STATE] = {0}; | |
2019 | ||
2020 | if (!c) | |
2021 | return false; | |
2022 | ||
2023 | if (!do_lxcapi_is_running(c)) | |
2024 | return true; | |
2025 | ||
2026 | pid = do_lxcapi_init_pid(c); | |
2027 | if (pid <= 0) | |
2028 | return true; | |
2029 | ||
2030 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2031 | rebootsignal = c->lxc_conf->rebootsignal; | |
2032 | ||
2033 | /* Add a new state client before sending the shutdown signal so that we | |
2034 | * don't miss a state. | |
2035 | */ | |
2036 | if (timeout != 0) { | |
2037 | states[RUNNING] = 2; | |
2038 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2039 | &state_client_fd); | |
2040 | if (ret < 0) | |
2041 | return false; | |
2042 | ||
2043 | if (state_client_fd < 0) | |
2044 | return false; | |
2045 | ||
2046 | if (ret == RUNNING) | |
2047 | return true; | |
2048 | ||
2049 | if (ret < MAX_STATE) | |
2050 | return false; | |
2051 | } | |
2052 | ||
2053 | /* Send reboot signal to container. */ | |
2054 | killret = kill(pid, rebootsignal); | |
2055 | if (killret < 0) { | |
d39b10eb CB |
2056 | if (state_client_fd >= 0) |
2057 | close(state_client_fd); | |
a73846d8 | 2058 | |
9dd54153 | 2059 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2060 | return false; |
2061 | } | |
2062 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2063 | ||
a579fa51 | 2064 | if (timeout == 0) |
d39b10eb CB |
2065 | return true; |
2066 | ||
2067 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2068 | close(state_client_fd); | |
2069 | if (ret < 0) | |
2070 | return false; | |
2071 | ||
2072 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2073 | if (ret != RUNNING) | |
2074 | return false; | |
2075 | ||
2076 | return true; | |
2077 | } | |
2078 | ||
2079 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2080 | ||
858377e4 | 2081 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2082 | { |
f8bdb6dc | 2083 | int killret, ret; |
72d0e1cb | 2084 | pid_t pid; |
9dd54153 | 2085 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2086 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2087 | |
2088 | if (!c) | |
2089 | return false; | |
2090 | ||
858377e4 | 2091 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2092 | return true; |
f8bdb6dc | 2093 | |
858377e4 | 2094 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2095 | if (pid <= 0) |
2096 | return true; | |
330ae3d3 CB |
2097 | |
2098 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2099 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2100 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2101 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2102 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2103 | |
92e35018 CB |
2104 | /* Add a new state client before sending the shutdown signal so that we |
2105 | * don't miss a state. | |
2106 | */ | |
f8bdb6dc CB |
2107 | if (timeout != 0) { |
2108 | states[STOPPED] = 1; | |
2109 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2110 | &state_client_fd); | |
2111 | if (ret < 0) | |
2112 | return false; | |
92e35018 | 2113 | |
f8bdb6dc CB |
2114 | if (state_client_fd < 0) |
2115 | return false; | |
2116 | ||
2117 | if (ret == STOPPED) | |
2118 | return true; | |
591614a7 | 2119 | |
f8bdb6dc | 2120 | if (ret < MAX_STATE) |
92e35018 | 2121 | return false; |
92e35018 CB |
2122 | } |
2123 | ||
f8bdb6dc CB |
2124 | /* Send shutdown signal to container. */ |
2125 | killret = kill(pid, haltsignal); | |
2126 | if (killret < 0) { | |
f8bdb6dc CB |
2127 | if (state_client_fd >= 0) |
2128 | close(state_client_fd); | |
a73846d8 | 2129 | |
9dd54153 | 2130 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2131 | return false; |
2132 | } | |
2133 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2134 | ||
923929f6 | 2135 | if (timeout == 0) |
f8bdb6dc CB |
2136 | return true; |
2137 | ||
2138 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2139 | close(state_client_fd); | |
2140 | if (ret < 0) | |
2141 | return false; | |
2142 | ||
2143 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2144 | if (ret != STOPPED) | |
2145 | return false; | |
2146 | ||
2147 | return true; | |
72d0e1cb SG |
2148 | } |
2149 | ||
858377e4 SH |
2150 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2151 | ||
1897e3bc | 2152 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2153 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2154 | { |
2155 | bool bret = false; | |
a0e93eeb | 2156 | char **args = NULL; |
72d0e1cb | 2157 | va_list ap; |
72d0e1cb SG |
2158 | |
2159 | if (!c) | |
2160 | return false; | |
2161 | ||
858377e4 SH |
2162 | current_config = c->lxc_conf; |
2163 | ||
72d0e1cb SG |
2164 | /* |
2165 | * since we're going to wait for create to finish, I don't think we | |
2166 | * need to get a copy of the arguments. | |
2167 | */ | |
dc23c1c8 | 2168 | va_start(ap, flags); |
a0e93eeb | 2169 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2170 | va_end(ap); |
a0e93eeb | 2171 | if (!args) { |
e9e29a33 | 2172 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2173 | goto out; |
2174 | } | |
72d0e1cb | 2175 | |
858377e4 | 2176 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2177 | |
2178 | out: | |
a0e93eeb | 2179 | free(args); |
858377e4 | 2180 | current_config = NULL; |
72d0e1cb SG |
2181 | return bret; |
2182 | } | |
2183 | ||
6b0d5538 SH |
2184 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2185 | { | |
4222a9f4 CB |
2186 | if (!strcmp(key, "lxc.cgroup")) |
2187 | return clear_unexp_config_line(conf, key, true); | |
2188 | ||
2189 | if (!strcmp(key, "lxc.network")) | |
2190 | return clear_unexp_config_line(conf, key, true); | |
2191 | ||
2192 | if (!strcmp(key, "lxc.net")) | |
2193 | return clear_unexp_config_line(conf, key, true); | |
2194 | ||
2195 | /* Clear a network with a specific index. */ | |
2196 | if (!strncmp(key, "lxc.net.", 8)) { | |
2197 | int ret; | |
2198 | const char *idx; | |
2199 | ||
2200 | idx = key + 8; | |
2201 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2202 | if (!ret) | |
2203 | return clear_unexp_config_line(conf, key, true); | |
2204 | } | |
2205 | ||
2206 | if (!strcmp(key, "lxc.hook")) | |
2207 | return clear_unexp_config_line(conf, key, true); | |
2208 | ||
2209 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2210 | } |
2211 | ||
6afd673f CB |
2212 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2213 | const char *key) | |
72d0e1cb | 2214 | { |
6afd673f CB |
2215 | int ret = 1; |
2216 | struct lxc_config_t *config; | |
72d0e1cb SG |
2217 | |
2218 | if (!c || !c->lxc_conf) | |
2219 | return false; | |
6afd673f | 2220 | |
5cee8c50 | 2221 | if (container_mem_lock(c)) |
72d0e1cb | 2222 | return false; |
6afd673f | 2223 | |
300df83e | 2224 | config = lxc_get_config(key); |
6afd673f CB |
2225 | /* Verify that the config key exists and that it has a callback |
2226 | * implemented. | |
2227 | */ | |
2228 | if (config && config->clr) | |
26471403 | 2229 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2230 | |
6b0d5538 SH |
2231 | if (!ret) |
2232 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2233 | |
5cee8c50 | 2234 | container_mem_unlock(c); |
72d0e1cb SG |
2235 | return ret == 0; |
2236 | } | |
2237 | ||
858377e4 SH |
2238 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2239 | ||
e0f59189 | 2240 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2241 | { |
858377e4 | 2242 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2243 | |
caab004f TA |
2244 | if (pid < 0) |
2245 | return false; | |
2246 | ||
a73846d8 | 2247 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2248 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2249 | if (!switch_to_ns(pid, "user")) |
2250 | return false; | |
a73846d8 | 2251 | |
51d0854c | 2252 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2253 | } |
2254 | ||
1a0e70ac | 2255 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2256 | static inline int string_cmp(char **first, char **second) |
2257 | { | |
2258 | return strcmp(*first, *second); | |
2259 | } | |
2260 | ||
1a0e70ac CB |
2261 | /* Used by qsort and bsearch functions for comparing container names. */ |
2262 | static inline int container_cmp(struct lxc_container **first, | |
2263 | struct lxc_container **second) | |
9c88ff1f ÇO |
2264 | { |
2265 | return strcmp((*first)->name, (*second)->name); | |
2266 | } | |
2267 | ||
2268 | static bool add_to_array(char ***names, char *cname, int pos) | |
2269 | { | |
2270 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2271 | if (!newnames) { | |
2272 | ERROR("Out of memory"); | |
2273 | return false; | |
2274 | } | |
2275 | ||
2276 | *names = newnames; | |
2277 | newnames[pos] = strdup(cname); | |
2278 | if (!newnames[pos]) | |
2279 | return false; | |
2280 | ||
3b034c39 | 2281 | /* Sort the array as we will use binary search on it. */ |
1a0e70ac CB |
2282 | qsort(newnames, pos + 1, sizeof(char *), |
2283 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2284 | |
2285 | return true; | |
2286 | } | |
2287 | ||
1a0e70ac CB |
2288 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2289 | int pos, bool sort) | |
9c88ff1f | 2290 | { |
1a0e70ac | 2291 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2292 | if (!newlist) { |
2293 | ERROR("Out of memory"); | |
2294 | return false; | |
2295 | } | |
2296 | ||
2297 | *list = newlist; | |
2298 | newlist[pos] = c; | |
2299 | ||
3b034c39 | 2300 | /* Sort the array as we will use binary search on it. */ |
2871830a | 2301 | if (sort) |
1a0e70ac CB |
2302 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2303 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2304 | |
2305 | return true; | |
2306 | } | |
2307 | ||
2308 | static char** get_from_array(char ***names, char *cname, int size) | |
2309 | { | |
2310 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2311 | } | |
2312 | ||
a73846d8 | 2313 | static bool array_contains(char ***names, char *cname, int size) |
2314 | { | |
9c88ff1f ÇO |
2315 | if(get_from_array(names, cname, size) != NULL) |
2316 | return true; | |
a73846d8 | 2317 | |
9c88ff1f ÇO |
2318 | return false; |
2319 | } | |
2320 | ||
2321 | static bool remove_from_array(char ***names, char *cname, int size) | |
2322 | { | |
2323 | char **result = get_from_array(names, cname, size); | |
2324 | if (result != NULL) { | |
2325 | free(result); | |
2326 | return true; | |
2327 | } | |
a73846d8 | 2328 | |
9c88ff1f ÇO |
2329 | return false; |
2330 | } | |
2331 | ||
9f4866a6 | 2332 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2333 | { |
ae22a220 ÇO |
2334 | pid_t pid; |
2335 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2336 | char **interfaces = NULL; |
ae22a220 | 2337 | char interface[IFNAMSIZ]; |
799f29ab | 2338 | |
0ac84f04 | 2339 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2340 | return NULL; |
c868b261 | 2341 | |
ae22a220 ÇO |
2342 | pid = fork(); |
2343 | if (pid < 0) { | |
9f4866a6 | 2344 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2345 | close(pipefd[0]); |
2346 | close(pipefd[1]); | |
2347 | return NULL; | |
2348 | } | |
799f29ab | 2349 | |
1a0e70ac | 2350 | if (pid == 0) { /* child */ |
ae22a220 | 2351 | int ret = 1, nbytes; |
b1e44ed1 | 2352 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
ae22a220 ÇO |
2353 | |
2354 | /* close the read-end of the pipe */ | |
2355 | close(pipefd[0]); | |
2356 | ||
e0f59189 | 2357 | if (!enter_net_ns(c)) { |
9f4866a6 | 2358 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2359 | goto out; |
2360 | } | |
2361 | ||
2362 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2363 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
9f4866a6 | 2364 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2365 | goto out; |
2366 | } | |
2367 | ||
2368 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2369 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2370 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2371 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2372 | if (nbytes < 0) |
ae22a220 | 2373 | goto out; |
9f4866a6 | 2374 | |
ae22a220 ÇO |
2375 | count++; |
2376 | } | |
a73846d8 | 2377 | |
ae22a220 ÇO |
2378 | ret = 0; |
2379 | ||
2380 | out: | |
2381 | if (interfaceArray) | |
b1e44ed1 | 2382 | netns_freeifaddrs(interfaceArray); |
ae22a220 ÇO |
2383 | |
2384 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2385 | close(pipefd[1]); | |
02c611b0 | 2386 | _exit(ret); |
799f29ab ÇO |
2387 | } |
2388 | ||
ae22a220 ÇO |
2389 | /* close the write-end of the pipe */ |
2390 | close(pipefd[1]); | |
2391 | ||
3e1e9db8 | 2392 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2393 | interface[IFNAMSIZ - 1] = '\0'; |
2394 | ||
ae22a220 | 2395 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2396 | continue; |
799f29ab | 2397 | |
9f4866a6 | 2398 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2399 | ERROR("Failed to add \"%s\" to array", interface); |
2400 | ||
9c88ff1f ÇO |
2401 | count++; |
2402 | } | |
799f29ab | 2403 | |
ae22a220 | 2404 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2405 | for (i = 0; i < count; i++) |
ae22a220 | 2406 | free(interfaces[i]); |
a73846d8 | 2407 | |
ae22a220 ÇO |
2408 | free(interfaces); |
2409 | interfaces = NULL; | |
2410 | } | |
9c88ff1f | 2411 | |
ae22a220 ÇO |
2412 | /* close the read-end of the pipe */ |
2413 | close(pipefd[0]); | |
799f29ab | 2414 | |
9c88ff1f | 2415 | /* Append NULL to the array */ |
9f4866a6 | 2416 | if (interfaces) |
9c88ff1f | 2417 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2418 | |
9c88ff1f | 2419 | return interfaces; |
799f29ab ÇO |
2420 | } |
2421 | ||
858377e4 SH |
2422 | WRAP_API(char **, lxcapi_get_interfaces) |
2423 | ||
02a0e184 CB |
2424 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2425 | const char *family, int scope) | |
799f29ab | 2426 | { |
02a0e184 | 2427 | int i, ret; |
ae22a220 | 2428 | pid_t pid; |
02a0e184 | 2429 | int pipefd[2]; |
ae22a220 | 2430 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2431 | int count = 0; |
2432 | char **addresses = NULL; | |
799f29ab | 2433 | |
0ac84f04 | 2434 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2435 | if (ret < 0) { |
2436 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2437 | return NULL; |
c868b261 ÇO |
2438 | } |
2439 | ||
ae22a220 ÇO |
2440 | pid = fork(); |
2441 | if (pid < 0) { | |
02a0e184 | 2442 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2443 | close(pipefd[0]); |
2444 | close(pipefd[1]); | |
2445 | return NULL; | |
9c83a661 SG |
2446 | } |
2447 | ||
02a0e184 CB |
2448 | if (pid == 0) { |
2449 | ssize_t nbytes; | |
ae22a220 | 2450 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
a7547c5c | 2451 | char *address_ptr = NULL; |
02a0e184 | 2452 | void *tempAddrPtr = NULL; |
b1e44ed1 | 2453 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
fe218ca3 | 2454 | |
ae22a220 ÇO |
2455 | /* close the read-end of the pipe */ |
2456 | close(pipefd[0]); | |
2457 | ||
e0f59189 | 2458 | if (!enter_net_ns(c)) { |
02a0e184 | 2459 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2460 | goto out; |
9c83a661 | 2461 | } |
ae22a220 ÇO |
2462 | |
2463 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2464 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
02a0e184 | 2465 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2466 | goto out; |
2467 | } | |
2468 | ||
2469 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2470 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2471 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2472 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2473 | continue; |
2474 | ||
6ce39620 CB |
2475 | #pragma GCC diagnostic push |
2476 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2477 | ||
02a0e184 | 2478 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2479 | if (family && strcmp(family, "inet")) |
2480 | continue; | |
02a0e184 | 2481 | |
ae22a220 | 2482 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2483 | } else { |
ae22a220 ÇO |
2484 | if (family && strcmp(family, "inet6")) |
2485 | continue; | |
2486 | ||
2487 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2488 | continue; | |
2489 | ||
2490 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2491 | } | |
2492 | ||
6ce39620 CB |
2493 | #pragma GCC diagnostic pop |
2494 | ||
ae22a220 ÇO |
2495 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) |
2496 | continue; | |
2497 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2498 | continue; |
2499 | ||
a7547c5c | 2500 | address_ptr = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2501 | tempAddrPtr, addressOutputBuffer, |
2502 | sizeof(addressOutputBuffer)); | |
a7547c5c | 2503 | if (!address_ptr) |
02a0e184 | 2504 | continue; |
ae22a220 | 2505 | |
a7547c5c | 2506 | nbytes = lxc_write_nointr(pipefd[1], address_ptr, INET6_ADDRSTRLEN); |
02a0e184 CB |
2507 | if (nbytes != INET6_ADDRSTRLEN) { |
2508 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
a7547c5c | 2509 | address_ptr); |
ae22a220 ÇO |
2510 | goto out; |
2511 | } | |
a73846d8 | 2512 | |
ae22a220 | 2513 | count++; |
9c83a661 | 2514 | } |
a73846d8 | 2515 | |
ae22a220 | 2516 | ret = 0; |
9c83a661 | 2517 | |
ae22a220 | 2518 | out: |
02a0e184 | 2519 | if (interfaceArray) |
b1e44ed1 | 2520 | netns_freeifaddrs(interfaceArray); |
9c83a661 | 2521 | |
ae22a220 ÇO |
2522 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2523 | close(pipefd[1]); | |
fe1ce58c | 2524 | _exit(ret); |
6849cb5b | 2525 | } |
9c83a661 | 2526 | |
ae22a220 ÇO |
2527 | /* close the write-end of the pipe */ |
2528 | close(pipefd[1]); | |
2529 | ||
02a0e184 CB |
2530 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2531 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2532 | ||
2533 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2534 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2535 | |
9c88ff1f | 2536 | count++; |
9c83a661 SG |
2537 | } |
2538 | ||
ae22a220 | 2539 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2540 | for (i = 0; i < count; i++) |
ae22a220 | 2541 | free(addresses[i]); |
02a0e184 | 2542 | |
ae22a220 ÇO |
2543 | free(addresses); |
2544 | addresses = NULL; | |
2545 | } | |
9c83a661 | 2546 | |
ae22a220 ÇO |
2547 | /* close the read-end of the pipe */ |
2548 | close(pipefd[0]); | |
9c83a661 SG |
2549 | |
2550 | /* Append NULL to the array */ | |
02a0e184 | 2551 | if (addresses) |
9c88ff1f | 2552 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2553 | |
2554 | return addresses; | |
2555 | } | |
2556 | ||
858377e4 SH |
2557 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2558 | ||
2559 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2560 | { |
fce687aa CB |
2561 | int ret = -1; |
2562 | struct lxc_config_t *config; | |
72d0e1cb SG |
2563 | |
2564 | if (!c || !c->lxc_conf) | |
2565 | return -1; | |
fce687aa | 2566 | |
5cee8c50 | 2567 | if (container_mem_lock(c)) |
72d0e1cb | 2568 | return -1; |
fce687aa | 2569 | |
300df83e | 2570 | config = lxc_get_config(key); |
fce687aa CB |
2571 | /* Verify that the config key exists and that it has a callback |
2572 | * implemented. | |
2573 | */ | |
2574 | if (config && config->get) | |
cccd2219 | 2575 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2576 | |
5cee8c50 | 2577 | container_mem_unlock(c); |
72d0e1cb SG |
2578 | return ret; |
2579 | } | |
2580 | ||
858377e4 SH |
2581 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2582 | ||
2583 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2584 | { |
2585 | char *ret; | |
2586 | ||
2587 | if (!c || !c->lxc_conf) | |
2588 | return NULL; | |
a73846d8 | 2589 | |
8ac18377 ÇO |
2590 | if (container_mem_lock(c)) |
2591 | return NULL; | |
a73846d8 | 2592 | |
858377e4 | 2593 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2594 | container_mem_unlock(c); |
2595 | return ret; | |
2596 | } | |
2597 | ||
858377e4 SH |
2598 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2599 | ||
2600 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2601 | { |
300df83e CB |
2602 | int ret = -1; |
2603 | ||
2604 | /* List all config items. */ | |
72d0e1cb | 2605 | if (!key) |
cfc67626 | 2606 | return lxc_list_config_items(retv, inlen); |
300df83e | 2607 | |
72d0e1cb SG |
2608 | if (!c || !c->lxc_conf) |
2609 | return -1; | |
300df83e | 2610 | |
5cee8c50 | 2611 | if (container_mem_lock(c)) |
72d0e1cb | 2612 | return -1; |
300df83e CB |
2613 | |
2614 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2615 | * This is an intelligent result to show which keys are valid given the | |
2616 | * type of nic it is. | |
2617 | */ | |
6fba98b5 | 2618 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2619 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2620 | else |
2621 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2622 | |
5cee8c50 | 2623 | container_mem_unlock(c); |
72d0e1cb SG |
2624 | return ret; |
2625 | } | |
2626 | ||
858377e4 SH |
2627 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2628 | ||
2629 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2630 | { |
0e1a60b0 | 2631 | int fd, lret; |
39dc698c | 2632 | bool ret = false, need_disklock = false; |
39dc698c | 2633 | |
72d0e1cb SG |
2634 | if (!alt_file) |
2635 | alt_file = c->configfile; | |
a73846d8 | 2636 | |
72d0e1cb | 2637 | if (!alt_file) |
1a0e70ac | 2638 | return false; |
39dc698c | 2639 | |
1a0e70ac | 2640 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2641 | if (!c->lxc_conf) { |
858377e4 | 2642 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2643 | ERROR("Error loading default configuration file %s " |
2644 | "while saving %s", | |
2645 | lxc_global_config_value("lxc.default_config"), | |
2646 | c->name); | |
72d0e1cb SG |
2647 | return false; |
2648 | } | |
39dc698c | 2649 | } |
72d0e1cb | 2650 | |
5a3d2e1e SG |
2651 | if (!create_container_dir(c)) |
2652 | return false; | |
2653 | ||
1a0e70ac CB |
2654 | /* If we're writing to the container's config file, take the disk lock. |
2655 | * Otherwise just take the memlock to protect the struct lxc_container | |
2656 | * while we're traversing it. | |
39dc698c SH |
2657 | */ |
2658 | if (strcmp(c->configfile, alt_file) == 0) | |
2659 | need_disklock = true; | |
2660 | ||
2661 | if (need_disklock) | |
2662 | lret = container_disk_lock(c); | |
2663 | else | |
2664 | lret = container_mem_lock(c); | |
39dc698c | 2665 | if (lret) |
72d0e1cb | 2666 | return false; |
39dc698c | 2667 | |
10034af5 | 2668 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2669 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2670 | if (fd < 0) |
2671 | goto on_error; | |
2672 | ||
2673 | lret = write_config(fd, c->lxc_conf); | |
2674 | close(fd); | |
2675 | if (lret < 0) | |
2676 | goto on_error; | |
2677 | ||
39dc698c SH |
2678 | ret = true; |
2679 | ||
0e1a60b0 | 2680 | on_error: |
39dc698c SH |
2681 | if (need_disklock) |
2682 | container_disk_unlock(c); | |
2683 | else | |
2684 | container_mem_unlock(c); | |
0e1a60b0 | 2685 | |
39dc698c | 2686 | return ret; |
72d0e1cb SG |
2687 | } |
2688 | ||
858377e4 SH |
2689 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2690 | ||
0ea055b3 CB |
2691 | |
2692 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2693 | { |
0ea055b3 CB |
2694 | FILE *f1; |
2695 | struct stat fbuf; | |
42342bed CB |
2696 | void *buf = NULL; |
2697 | char *del = NULL; | |
8a22c168 CB |
2698 | char path[PATH_MAX]; |
2699 | char newpath[PATH_MAX]; | |
0ea055b3 | 2700 | int fd, ret, n = 0, v = 0; |
dfb31b25 | 2701 | bool bret = false; |
42342bed | 2702 | size_t len = 0, bytes = 0; |
dfb31b25 | 2703 | |
0ea055b3 | 2704 | if (container_disk_lock(c0)) |
dfb31b25 | 2705 | return false; |
0ea055b3 | 2706 | |
8a22c168 CB |
2707 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c0->config_path, c0->name); |
2708 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2709 | goto out; |
a73846d8 | 2710 | |
8a22c168 CB |
2711 | ret = snprintf(newpath, PATH_MAX, "%s\n%s\n", c->config_path, c->name); |
2712 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2713 | goto out; |
0ea055b3 CB |
2714 | |
2715 | /* If we find an lxc-snapshot file using the old format only listing the | |
2716 | * number of snapshots we will keep using it. */ | |
2717 | f1 = fopen(path, "r"); | |
2718 | if (f1) { | |
2719 | n = fscanf(f1, "%d", &v); | |
2720 | fclose(f1); | |
2721 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2722 | ret = remove(path); |
2723 | if (ret < 0) | |
6d1400b5 | 2724 | SYSERROR("Failed to remove \"%s\"", path); |
2725 | ||
0ea055b3 CB |
2726 | n = 0; |
2727 | } | |
dfb31b25 | 2728 | } |
6d1400b5 | 2729 | |
0ea055b3 CB |
2730 | if (n == 1) { |
2731 | v += inc ? 1 : -1; | |
2732 | f1 = fopen(path, "w"); | |
2733 | if (!f1) | |
2734 | goto out; | |
6d1400b5 | 2735 | |
0ea055b3 CB |
2736 | if (fprintf(f1, "%d\n", v) < 0) { |
2737 | ERROR("Error writing new snapshots value"); | |
2738 | fclose(f1); | |
2739 | goto out; | |
2740 | } | |
6d1400b5 | 2741 | |
0ea055b3 CB |
2742 | ret = fclose(f1); |
2743 | if (ret != 0) { | |
2744 | SYSERROR("Error writing to or closing snapshots file"); | |
2745 | goto out; | |
2746 | } | |
2747 | } else { | |
2748 | /* Here we know that we have or can use an lxc-snapshot file | |
2749 | * using the new format. */ | |
2750 | if (inc) { | |
2751 | f1 = fopen(path, "a"); | |
2752 | if (!f1) | |
2753 | goto out; | |
2754 | ||
2755 | if (fprintf(f1, "%s", newpath) < 0) { | |
2756 | ERROR("Error writing new snapshots entry"); | |
2757 | ret = fclose(f1); | |
2758 | if (ret != 0) | |
2759 | SYSERROR("Error writing to or closing snapshots file"); | |
2760 | goto out; | |
2761 | } | |
2762 | ||
2763 | ret = fclose(f1); | |
2764 | if (ret != 0) { | |
2765 | SYSERROR("Error writing to or closing snapshots file"); | |
2766 | goto out; | |
2767 | } | |
2768 | } else if (!inc) { | |
d028235d SG |
2769 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2770 | goto out; | |
2771 | ||
2772 | if (fstat(fd, &fbuf) < 0) { | |
2773 | close(fd); | |
2774 | goto out; | |
2775 | } | |
2776 | ||
2777 | if (fbuf.st_size != 0) { | |
25086a5f | 2778 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2779 | if (buf == MAP_FAILED) { |
2780 | SYSERROR("Failed to create mapping %s", path); | |
2781 | close(fd); | |
2782 | goto out; | |
2783 | } | |
2784 | ||
2785 | len = strlen(newpath); | |
2786 | while ((del = strstr((char *)buf, newpath))) { | |
2787 | memmove(del, del + len, strlen(del) - len + 1); | |
2788 | bytes += len; | |
2789 | } | |
2790 | ||
25086a5f | 2791 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2792 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2793 | SYSERROR("Failed to truncate file %s", path); | |
2794 | close(fd); | |
2795 | goto out; | |
2796 | } | |
2797 | } | |
a73846d8 | 2798 | |
d028235d SG |
2799 | close(fd); |
2800 | } | |
0ea055b3 CB |
2801 | |
2802 | /* If the lxc-snapshot file is empty, remove it. */ | |
2803 | if (stat(path, &fbuf) < 0) | |
2804 | goto out; | |
6d1400b5 | 2805 | |
d028235d | 2806 | if (!fbuf.st_size) { |
71261a5c CB |
2807 | ret = remove(path); |
2808 | if (ret < 0) | |
2809 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2810 | } |
dfb31b25 SH |
2811 | } |
2812 | ||
2813 | bret = true; | |
2814 | ||
2815 | out: | |
0ea055b3 | 2816 | container_disk_unlock(c0); |
dfb31b25 SH |
2817 | return bret; |
2818 | } | |
2819 | ||
d825fff3 | 2820 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2821 | { |
2822 | struct lxc_container *p; | |
8a22c168 | 2823 | char *lxcpath = NULL, *lxcname = NULL, path[PATH_MAX]; |
dfb31b25 SH |
2824 | size_t pathlen = 0, namelen = 0; |
2825 | FILE *f; | |
2826 | int ret; | |
2827 | ||
8a22c168 | 2828 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", |
dfb31b25 | 2829 | c->config_path, c->name); |
8a22c168 | 2830 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
2831 | ERROR("Path name too long"); |
2832 | return; | |
2833 | } | |
a73846d8 | 2834 | |
025ed0f3 | 2835 | f = fopen(path, "r"); |
025ed0f3 | 2836 | if (f == NULL) |
dfb31b25 | 2837 | return; |
a73846d8 | 2838 | |
dfb31b25 SH |
2839 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2840 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2841 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2842 | goto out; |
2843 | } | |
7ad37670 CB |
2844 | |
2845 | remove_trailing_newlines(lxcpath); | |
2846 | remove_trailing_newlines(lxcname); | |
2847 | ||
dfb31b25 SH |
2848 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2849 | ERROR("Unable to find dependent container %s:%s", | |
2850 | lxcpath, lxcname); | |
2851 | continue; | |
2852 | } | |
a73846d8 | 2853 | |
0ea055b3 CB |
2854 | if (!mod_rdep(p, c, inc)) |
2855 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2856 | lxcpath, lxcname); |
a73846d8 | 2857 | |
dfb31b25 SH |
2858 | lxc_container_put(p); |
2859 | } | |
a73846d8 | 2860 | |
dfb31b25 | 2861 | out: |
f10fad2f ME |
2862 | free(lxcpath); |
2863 | free(lxcname); | |
dfb31b25 SH |
2864 | fclose(f); |
2865 | } | |
2866 | ||
18aa217b | 2867 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2868 | { |
0ea055b3 | 2869 | FILE *f; |
8a22c168 | 2870 | char path[PATH_MAX]; |
dfb31b25 | 2871 | int ret, v; |
0ea055b3 | 2872 | struct stat fbuf; |
dfb31b25 SH |
2873 | bool bret = false; |
2874 | ||
8a22c168 | 2875 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c->config_path, |
dfb31b25 | 2876 | c->name); |
8a22c168 | 2877 | if (ret < 0 || ret > PATH_MAX) |
dfb31b25 | 2878 | goto out; |
a73846d8 | 2879 | |
0ea055b3 CB |
2880 | /* If the file doesn't exist there are no snapshots. */ |
2881 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2882 | goto out; |
a73846d8 | 2883 | |
0ea055b3 CB |
2884 | v = fbuf.st_size; |
2885 | if (v != 0) { | |
2886 | f = fopen(path, "r"); | |
2887 | if (!f) | |
2888 | goto out; | |
a73846d8 | 2889 | |
0ea055b3 CB |
2890 | ret = fscanf(f, "%d", &v); |
2891 | fclose(f); | |
1a0e70ac | 2892 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2893 | if (ret != 1) |
2894 | INFO("Container uses new lxc-snapshots format %s", path); | |
2895 | } | |
a73846d8 | 2896 | |
dfb31b25 SH |
2897 | bret = v != 0; |
2898 | ||
2899 | out: | |
2900 | return bret; | |
2901 | } | |
2902 | ||
18aa217b SH |
2903 | static bool has_snapshots(struct lxc_container *c) |
2904 | { | |
8a22c168 | 2905 | char path[PATH_MAX]; |
74f96976 | 2906 | struct dirent *direntp; |
18aa217b SH |
2907 | int count=0; |
2908 | DIR *dir; | |
2909 | ||
2910 | if (!get_snappath_dir(c, path)) | |
2911 | return false; | |
a73846d8 | 2912 | |
18aa217b SH |
2913 | dir = opendir(path); |
2914 | if (!dir) | |
2915 | return false; | |
a73846d8 | 2916 | |
74f96976 | 2917 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2918 | if (!strcmp(direntp->d_name, ".")) |
2919 | continue; | |
2920 | ||
2921 | if (!strcmp(direntp->d_name, "..")) | |
2922 | continue; | |
2923 | count++; | |
2924 | break; | |
2925 | } | |
a73846d8 | 2926 | |
18aa217b SH |
2927 | closedir(dir); |
2928 | return count > 0; | |
2929 | } | |
2930 | ||
297c2d58 | 2931 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2932 | int ret; |
2933 | ||
e0010464 | 2934 | if (am_guest_unpriv()) { |
ee484f7f CB |
2935 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2936 | "storage_destroy_wrapper"); | |
2937 | if (ret < 0) | |
d028235d | 2938 | return false; |
ee484f7f | 2939 | |
d028235d SG |
2940 | return true; |
2941 | } | |
ee484f7f | 2942 | |
10bc1861 | 2943 | return storage_destroy(conf); |
297c2d58 CB |
2944 | } |
2945 | ||
4355ab5f SH |
2946 | static int lxc_rmdir_onedev_wrapper(void *data) |
2947 | { | |
2948 | char *arg = (char *) data; | |
18aa217b | 2949 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2950 | } |
2951 | ||
17a367d8 | 2952 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2953 | { |
17a367d8 CB |
2954 | char *arg = data; |
2955 | return unlink(arg); | |
2956 | } | |
2957 | ||
2958 | static bool container_destroy(struct lxc_container *c, | |
2959 | struct lxc_storage *storage) | |
2960 | { | |
2961 | const char *p1; | |
2962 | size_t len; | |
2963 | struct lxc_conf *conf; | |
2964 | char *path = NULL; | |
c868b261 | 2965 | bool bret = false; |
297c2d58 | 2966 | int ret = 0; |
72d0e1cb | 2967 | |
858377e4 | 2968 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2969 | return false; |
2970 | ||
a70a69e8 | 2971 | conf = c->lxc_conf; |
3bc449ed | 2972 | if (container_disk_lock(c)) |
72d0e1cb | 2973 | return false; |
72d0e1cb | 2974 | |
39dc698c | 2975 | if (!is_stopped(c)) { |
1a0e70ac | 2976 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2977 | ERROR("container %s is not stopped", c->name); |
2978 | goto out; | |
72d0e1cb SG |
2979 | } |
2980 | ||
a70a69e8 | 2981 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2982 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2983 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2984 | SYSERROR("Failed to set environment variable for container name"); |
2985 | ||
2986 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2987 | SYSERROR("Failed to set environment variable for config path"); | |
2988 | ||
2989 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2990 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2991 | ||
2992 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2993 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2994 | ||
2995 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2996 | SYSERROR("Failed to set environment variable for console path"); | |
2997 | ||
2998 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2999 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
3000 | /* End of environment variable setup for hooks */ |
3001 | ||
14a7b0f9 | 3002 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 3003 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
3004 | goto out; |
3005 | } | |
3006 | } | |
3007 | ||
3008 | if (current_config && conf == current_config) { | |
858377e4 | 3009 | current_config = NULL; |
a73846d8 | 3010 | |
37cf711b SY |
3011 | if (conf->logfd != -1) { |
3012 | close(conf->logfd); | |
3013 | conf->logfd = -1; | |
858377e4 SH |
3014 | } |
3015 | } | |
3016 | ||
6e54330c CB |
3017 | /* LXC is not managing the storage of the container. */ |
3018 | if (conf && !conf->rootfs.managed) | |
3019 | goto on_success; | |
3020 | ||
d028235d SG |
3021 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
3022 | if (!do_destroy_container(conf)) { | |
3023 | ERROR("Error destroying rootfs for %s", c->name); | |
3024 | goto out; | |
3025 | } | |
3026 | INFO("Destroyed rootfs for %s", c->name); | |
3027 | } | |
60bf62d4 | 3028 | |
dfb31b25 SH |
3029 | mod_all_rdeps(c, false); |
3030 | ||
17a367d8 CB |
3031 | p1 = do_lxcapi_get_config_path(c); |
3032 | /* strlen(p1) | |
3033 | * + | |
3034 | * / | |
3035 | * + | |
3036 | * strlen(c->name) | |
3037 | * + | |
3038 | * / | |
3039 | * + | |
3040 | * strlen("config") = 6 | |
3041 | * + | |
3042 | * \0 | |
3043 | */ | |
3044 | len = strlen(p1) + 1 + strlen(c->name) + 1 + 6 + 1; | |
3045 | path = malloc(len); | |
3046 | if (!path) { | |
3047 | ERROR("Failed to allocate memory"); | |
3048 | goto out; | |
3049 | } | |
3050 | ||
3051 | /* For an overlay container the rootfs is considered immutable and | |
3052 | * cannot be removed when restoring from a snapshot. | |
3053 | */ | |
3054 | if (storage && (!strcmp(storage->type, "overlay") || | |
3055 | !strcmp(storage->type, "overlayfs")) && | |
3056 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3057 | ret = snprintf(path, len, "%s/%s/config", p1, c->name); | |
3058 | if (ret < 0 || (size_t)ret >= len) | |
3059 | goto out; | |
3060 | ||
e0010464 | 3061 | if (am_guest_unpriv()) |
17a367d8 CB |
3062 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3063 | "lxc_unlink_exec_wrapper"); | |
3064 | else | |
3065 | ret = unlink(path); | |
3066 | if (ret < 0) { | |
3067 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3068 | path, c->name); | |
3069 | goto out; | |
3070 | } | |
3071 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3072 | ||
3073 | bret = true; | |
3074 | goto out; | |
3075 | } | |
3076 | ||
3077 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3078 | if (ret < 0 || (size_t)ret >= len) | |
3079 | goto out; | |
a73846d8 | 3080 | |
e0010464 | 3081 | if (am_guest_unpriv()) |
ee484f7f CB |
3082 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3083 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3084 | else |
18aa217b | 3085 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3086 | if (ret < 0) { |
17a367d8 CB |
3087 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3088 | c->name); | |
60bf62d4 SH |
3089 | goto out; |
3090 | } | |
17a367d8 | 3091 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3092 | |
6e54330c | 3093 | on_success: |
fef48dc9 | 3094 | bret = true; |
60bf62d4 SH |
3095 | |
3096 | out: | |
17a367d8 CB |
3097 | if (path) |
3098 | free(path); | |
a73846d8 | 3099 | |
3bc449ed | 3100 | container_disk_unlock(c); |
fef48dc9 | 3101 | return bret; |
72d0e1cb SG |
3102 | } |
3103 | ||
858377e4 | 3104 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3105 | { |
3106 | if (!c || !lxcapi_is_defined(c)) | |
3107 | return false; | |
2b2655a8 | 3108 | |
6e54330c CB |
3109 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3110 | if (has_snapshots(c)) { | |
3111 | ERROR("Container %s has snapshots; not removing", c->name); | |
3112 | return false; | |
3113 | } | |
18aa217b | 3114 | |
6e54330c CB |
3115 | if (has_fs_snapshots(c)) { |
3116 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3117 | return false; | |
3118 | } | |
18aa217b SH |
3119 | } |
3120 | ||
17a367d8 | 3121 | return container_destroy(c, NULL); |
18aa217b SH |
3122 | } |
3123 | ||
858377e4 | 3124 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3125 | |
858377e4 | 3126 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3127 | { |
3128 | if (!c || !lxcapi_is_defined(c)) | |
3129 | return false; | |
a73846d8 | 3130 | |
18aa217b SH |
3131 | if (!lxcapi_snapshot_destroy_all(c)) { |
3132 | ERROR("Error deleting all snapshots"); | |
3133 | return false; | |
3134 | } | |
a73846d8 | 3135 | |
18aa217b SH |
3136 | return lxcapi_destroy(c); |
3137 | } | |
3138 | ||
858377e4 SH |
3139 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3140 | ||
0d9cd9c3 CB |
3141 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3142 | const char *v) | |
96532523 | 3143 | { |
0d9cd9c3 | 3144 | int ret; |
96532523 | 3145 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3146 | bool bret = true; |
3147 | ||
3148 | config = lxc_get_config(key); | |
3149 | if (!config) | |
3150 | return -EINVAL; | |
3151 | ||
3152 | ret = config->set(key, v, conf, NULL); | |
3153 | if (ret < 0) | |
3154 | return -EINVAL; | |
3155 | ||
3156 | if (lxc_config_value_empty(v)) | |
3157 | do_clear_unexp_config_line(conf, key); | |
3158 | else | |
3159 | bret = do_append_unexp_config_line(conf, key, v); | |
3160 | if (!bret) | |
3161 | return -ENOMEM; | |
3162 | ||
3163 | return 0; | |
3164 | } | |
3165 | ||
3166 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3167 | const char *v) | |
3168 | { | |
3169 | int ret; | |
96532523 SH |
3170 | |
3171 | if (!c->lxc_conf) | |
3172 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3173 | |
6b0d5538 | 3174 | if (!c->lxc_conf) |
96532523 | 3175 | return false; |
4222a9f4 | 3176 | |
0d9cd9c3 CB |
3177 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3178 | if (ret < 0) | |
f979ac15 | 3179 | return false; |
4222a9f4 | 3180 | |
0d9cd9c3 | 3181 | return true; |
96532523 SH |
3182 | } |
3183 | ||
858377e4 | 3184 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3185 | { |
72d0e1cb | 3186 | bool b = false; |
72d0e1cb SG |
3187 | |
3188 | if (!c) | |
3189 | return false; | |
3190 | ||
5cee8c50 | 3191 | if (container_mem_lock(c)) |
72d0e1cb SG |
3192 | return false; |
3193 | ||
0d9cd9c3 | 3194 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3195 | |
5cee8c50 | 3196 | container_mem_unlock(c); |
72d0e1cb SG |
3197 | return b; |
3198 | } | |
3199 | ||
858377e4 SH |
3200 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3201 | ||
72d0e1cb SG |
3202 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3203 | { | |
3204 | if (!c || !c->configfile) | |
3205 | return NULL; | |
a73846d8 | 3206 | |
72d0e1cb SG |
3207 | return strdup(c->configfile); |
3208 | } | |
3209 | ||
2a59a681 SH |
3210 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3211 | { | |
3212 | if (!c || !c->config_path) | |
3213 | return NULL; | |
a73846d8 | 3214 | |
2a59a681 SH |
3215 | return (const char *)(c->config_path); |
3216 | } | |
3217 | ||
afeecbba SH |
3218 | /* |
3219 | * not for export | |
3220 | * Just recalculate the c->configfile based on the | |
3221 | * c->config_path, which must be set. | |
3222 | * The lxc_container must be locked or not yet public. | |
3223 | */ | |
3224 | static bool set_config_filename(struct lxc_container *c) | |
3225 | { | |
3226 | char *newpath; | |
3227 | int len, ret; | |
3228 | ||
3229 | if (!c->config_path) | |
3230 | return false; | |
3231 | ||
3232 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
3233 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
3234 | newpath = malloc(len); | |
3235 | if (!newpath) | |
3236 | return false; | |
3237 | ||
3238 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
3239 | if (ret < 0 || ret >= len) { | |
3240 | fprintf(stderr, "Error printing out config file name\n"); | |
3241 | free(newpath); | |
3242 | return false; | |
3243 | } | |
3244 | ||
f10fad2f | 3245 | free(c->configfile); |
afeecbba SH |
3246 | c->configfile = newpath; |
3247 | ||
3248 | return true; | |
3249 | } | |
3250 | ||
858377e4 | 3251 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3252 | { |
3253 | char *p; | |
3254 | bool b = false; | |
afeecbba | 3255 | char *oldpath = NULL; |
2a59a681 SH |
3256 | |
3257 | if (!c) | |
3258 | return b; | |
3259 | ||
5cee8c50 | 3260 | if (container_mem_lock(c)) |
2a59a681 SH |
3261 | return b; |
3262 | ||
3263 | p = strdup(path); | |
afeecbba SH |
3264 | if (!p) { |
3265 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3266 | goto err; |
afeecbba SH |
3267 | } |
3268 | ||
2a59a681 SH |
3269 | b = true; |
3270 | if (c->config_path) | |
afeecbba | 3271 | oldpath = c->config_path; |
2a59a681 | 3272 | c->config_path = p; |
afeecbba SH |
3273 | |
3274 | /* Since we've changed the config path, we have to change the | |
3275 | * config file name too */ | |
3276 | if (!set_config_filename(c)) { | |
3277 | ERROR("Out of memory setting new config filename"); | |
3278 | b = false; | |
3279 | free(c->config_path); | |
3280 | c->config_path = oldpath; | |
3281 | oldpath = NULL; | |
3282 | } | |
a73846d8 | 3283 | |
2a59a681 | 3284 | err: |
f10fad2f | 3285 | free(oldpath); |
5cee8c50 | 3286 | container_mem_unlock(c); |
2a59a681 SH |
3287 | return b; |
3288 | } | |
3289 | ||
858377e4 | 3290 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3291 | |
858377e4 | 3292 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3293 | { |
3294 | int ret; | |
2202afc9 | 3295 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3296 | |
3297 | if (!c) | |
3298 | return false; | |
3299 | ||
3bc449ed | 3300 | if (is_stopped(c)) |
794dd120 SH |
3301 | return false; |
3302 | ||
5a087e05 | 3303 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3304 | if (!cgroup_ops) |
3305 | return false; | |
3306 | ||
2202afc9 | 3307 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed | 3308 | |
2202afc9 CB |
3309 | cgroup_exit(cgroup_ops); |
3310 | ||
3bc449ed | 3311 | return ret == 0; |
794dd120 SH |
3312 | } |
3313 | ||
858377e4 SH |
3314 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3315 | ||
3316 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3317 | { |
3bc449ed | 3318 | int ret; |
2202afc9 | 3319 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3320 | |
6502006a | 3321 | if (!c) |
794dd120 SH |
3322 | return -1; |
3323 | ||
3bc449ed | 3324 | if (is_stopped(c)) |
794dd120 SH |
3325 | return -1; |
3326 | ||
5a087e05 | 3327 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3328 | if (!cgroup_ops) |
3329 | return -1; | |
3330 | ||
2202afc9 CB |
3331 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3332 | c->config_path); | |
2202afc9 CB |
3333 | |
3334 | cgroup_exit(cgroup_ops); | |
3335 | ||
794dd120 SH |
3336 | return ret; |
3337 | } | |
3338 | ||
858377e4 SH |
3339 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3340 | ||
593e8478 | 3341 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3342 | { |
593e8478 | 3343 | return lxc_global_config_value(key); |
a8428dfa SH |
3344 | } |
3345 | ||
b6b918a1 SG |
3346 | const char *lxc_get_version(void) |
3347 | { | |
95ee490b | 3348 | return LXC_VERSION; |
b6b918a1 SG |
3349 | } |
3350 | ||
f0ca2726 | 3351 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3352 | { |
3353 | int in, out; | |
3354 | ssize_t len, ret; | |
3355 | char buf[8096]; | |
3356 | struct stat sbuf; | |
3357 | ||
3358 | if (file_exists(new)) { | |
3359 | ERROR("copy destination %s exists", new); | |
3360 | return -1; | |
3361 | } | |
a73846d8 | 3362 | |
9be53773 SH |
3363 | ret = stat(old, &sbuf); |
3364 | if (ret < 0) { | |
dfb31b25 | 3365 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3366 | return -1; |
3367 | } | |
3368 | ||
3369 | in = open(old, O_RDONLY); | |
3370 | if (in < 0) { | |
dfb31b25 | 3371 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3372 | return -1; |
3373 | } | |
a73846d8 | 3374 | |
9be53773 SH |
3375 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3376 | if (out < 0) { | |
dfb31b25 | 3377 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3378 | close(in); |
3379 | return -1; | |
3380 | } | |
3381 | ||
51a8a74c | 3382 | for (;;) { |
3e1e9db8 | 3383 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3384 | if (len < 0) { |
dfb31b25 | 3385 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3386 | goto err; |
3387 | } | |
a73846d8 | 3388 | |
9be53773 SH |
3389 | if (len == 0) |
3390 | break; | |
a73846d8 | 3391 | |
2a2a676d | 3392 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3393 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3394 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3395 | goto err; |
3396 | } | |
3397 | } | |
a73846d8 | 3398 | |
9be53773 SH |
3399 | close(in); |
3400 | close(out); | |
3401 | ||
1a0e70ac | 3402 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3403 | ret = chmod(new, sbuf.st_mode); |
3404 | if (ret) { | |
dfb31b25 | 3405 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3406 | return -1; |
3407 | } | |
3408 | ||
3409 | return 0; | |
3410 | ||
3411 | err: | |
3412 | close(in); | |
3413 | close(out); | |
3414 | return -1; | |
3415 | } | |
3416 | ||
9be53773 SH |
3417 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3418 | { | |
7a99b5a0 | 3419 | __do_free char *cpath = NULL; |
619256b5 | 3420 | int i, len, ret; |
9be53773 | 3421 | struct lxc_list *it; |
619256b5 ÇO |
3422 | |
3423 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
f5849fd7 | 3424 | cpath = must_realloc(NULL, len); |
619256b5 ÇO |
3425 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); |
3426 | if (ret < 0 || ret >= len) | |
3427 | return -1; | |
9be53773 SH |
3428 | |
3429 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3430 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3431 | char *hookname = it->elem; | |
c32981c3 | 3432 | char *fname = strrchr(hookname, '/'); |
8a22c168 | 3433 | char tmppath[PATH_MAX]; |
1a0e70ac | 3434 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3435 | return 0; |
a73846d8 | 3436 | |
619256b5 | 3437 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3438 | /* this hook is public - ignore */ |
619256b5 ÇO |
3439 | continue; |
3440 | } | |
a73846d8 | 3441 | |
1a0e70ac | 3442 | /* copy the script, and change the entry in confile */ |
8a22c168 | 3443 | ret = snprintf(tmppath, PATH_MAX, "%s/%s/%s", |
9be53773 | 3444 | c->config_path, c->name, fname+1); |
8a22c168 | 3445 | if (ret < 0 || ret >= PATH_MAX) |
9be53773 | 3446 | return -1; |
a73846d8 | 3447 | |
9be53773 SH |
3448 | ret = copy_file(it->elem, tmppath); |
3449 | if (ret < 0) | |
3450 | return -1; | |
a73846d8 | 3451 | |
9be53773 | 3452 | free(it->elem); |
a73846d8 | 3453 | |
9be53773 SH |
3454 | it->elem = strdup(tmppath); |
3455 | if (!it->elem) { | |
3456 | ERROR("out of memory copying hook path"); | |
3457 | return -1; | |
3458 | } | |
9be53773 SH |
3459 | } |
3460 | } | |
3461 | ||
67702c21 SH |
3462 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3463 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3464 | ERROR("Error saving new hooks in clone"); |
3465 | return -1; | |
3466 | } | |
a73846d8 | 3467 | |
858377e4 | 3468 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3469 | return 0; |
3470 | } | |
3471 | ||
9be53773 SH |
3472 | |
3473 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3474 | { | |
8a22c168 | 3475 | char newpath[PATH_MAX]; |
9be53773 SH |
3476 | char *oldpath = oldc->lxc_conf->fstab; |
3477 | int ret; | |
3478 | ||
3479 | if (!oldpath) | |
3480 | return 0; | |
3481 | ||
47148e96 CB |
3482 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3483 | ||
c32981c3 | 3484 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3485 | if (!p) |
3486 | return -1; | |
a73846d8 | 3487 | |
8a22c168 | 3488 | ret = snprintf(newpath, PATH_MAX, "%s/%s%s", |
9be53773 | 3489 | c->config_path, c->name, p); |
8a22c168 | 3490 | if (ret < 0 || ret >= PATH_MAX) { |
9be53773 SH |
3491 | ERROR("error printing new path for %s", oldpath); |
3492 | return -1; | |
3493 | } | |
a73846d8 | 3494 | |
9be53773 SH |
3495 | if (file_exists(newpath)) { |
3496 | ERROR("error: fstab file %s exists", newpath); | |
3497 | return -1; | |
3498 | } | |
3499 | ||
3500 | if (copy_file(oldpath, newpath) < 0) { | |
3501 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3502 | return -1; | |
3503 | } | |
a73846d8 | 3504 | |
9be53773 | 3505 | free(c->lxc_conf->fstab); |
a73846d8 | 3506 | |
9be53773 SH |
3507 | c->lxc_conf->fstab = strdup(newpath); |
3508 | if (!c->lxc_conf->fstab) { | |
3509 | ERROR("error: allocating pathname"); | |
3510 | return -1; | |
3511 | } | |
a73846d8 | 3512 | |
47148e96 | 3513 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3514 | ERROR("error saving new lxctab"); |
3515 | return -1; | |
3516 | } | |
9be53773 SH |
3517 | |
3518 | return 0; | |
3519 | } | |
3520 | ||
dfb31b25 SH |
3521 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3522 | { | |
8a22c168 | 3523 | char path0[PATH_MAX], path1[PATH_MAX]; |
dfb31b25 SH |
3524 | int ret; |
3525 | ||
8a22c168 | 3526 | ret = snprintf(path0, PATH_MAX, "%s/%s/lxc_rdepends", c0->config_path, |
dfb31b25 | 3527 | c0->name); |
8a22c168 | 3528 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3529 | WARN("Error copying reverse dependencies"); |
3530 | return; | |
3531 | } | |
a73846d8 | 3532 | |
8a22c168 | 3533 | ret = snprintf(path1, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3534 | c->name); |
8a22c168 | 3535 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3536 | WARN("Error copying reverse dependencies"); |
3537 | return; | |
3538 | } | |
a73846d8 | 3539 | |
dfb31b25 SH |
3540 | if (copy_file(path0, path1) < 0) { |
3541 | INFO("Error copying reverse dependencies"); | |
3542 | return; | |
3543 | } | |
3544 | } | |
3545 | ||
3546 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3547 | { | |
3548 | int ret; | |
8a22c168 | 3549 | char path[PATH_MAX]; |
dfb31b25 SH |
3550 | FILE *f; |
3551 | bool bret; | |
3552 | ||
8a22c168 | 3553 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3554 | c->name); |
8a22c168 | 3555 | if (ret < 0 || ret >= PATH_MAX) |
dfb31b25 | 3556 | return false; |
a73846d8 | 3557 | |
dfb31b25 SH |
3558 | f = fopen(path, "a"); |
3559 | if (!f) | |
3560 | return false; | |
a73846d8 | 3561 | |
dfb31b25 | 3562 | bret = true; |
a73846d8 | 3563 | |
1a0e70ac | 3564 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3565 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3566 | bret = false; | |
a73846d8 | 3567 | |
dfb31b25 SH |
3568 | if (fclose(f) != 0) |
3569 | bret = false; | |
a73846d8 | 3570 | |
dfb31b25 SH |
3571 | return bret; |
3572 | } | |
3573 | ||
15a90a10 SH |
3574 | /* |
3575 | * If the fs natively supports snapshot clones with no penalty, | |
3576 | * then default to those even if not requested. | |
3577 | * Currently we only do this for btrfs. | |
3578 | */ | |
3579 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3580 | struct lxc_container *c1) | |
3581 | { | |
7a99b5a0 | 3582 | __do_free char *p0 = NULL, *p1 = NULL; |
2afdc31f | 3583 | int ret; |
15a90a10 SH |
3584 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3585 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
6e0fa6a0 | 3586 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3587 | |
f5849fd7 CB |
3588 | p0 = must_realloc(NULL, l0 + 1); |
3589 | p1 = must_realloc(NULL, l1 + 1); | |
2afdc31f CB |
3590 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3591 | if (ret < 0 || ret >= l0) | |
3592 | return false; | |
3593 | ||
3594 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3595 | if (ret < 0 || ret >= l1) | |
3596 | return false; | |
9a09badc CB |
3597 | |
3598 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3599 | return false; | |
3600 | ||
6e0fa6a0 CB |
3601 | if (is_btrfs_subvol(rootfs) <= 0) |
3602 | return false; | |
3603 | ||
15a90a10 SH |
3604 | return btrfs_same_fs(p0, p1) == 0; |
3605 | } | |
3606 | ||
9be53773 | 3607 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3608 | const char *newtype, int flags, const char *bdevdata, |
3609 | uint64_t newsize) | |
9be53773 | 3610 | { |
10bc1861 | 3611 | struct lxc_storage *bdev; |
07db51a2 | 3612 | bool need_rdep; |
9be53773 | 3613 | |
15a90a10 SH |
3614 | if (should_default_to_snapshot(c0, c)) |
3615 | flags |= LXC_CLONE_SNAPSHOT; | |
3616 | ||
10bc1861 CB |
3617 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3618 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3619 | if (!bdev) { |
763429b6 | 3620 | ERROR("Error copying storage."); |
9be53773 SH |
3621 | return -1; |
3622 | } | |
763429b6 CB |
3623 | |
3624 | /* Set new rootfs. */ | |
9be53773 SH |
3625 | free(c->lxc_conf->rootfs.path); |
3626 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3627 | storage_put(bdev); |
763429b6 | 3628 | |
dfb31b25 | 3629 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3630 | ERROR("Out of memory while setting storage path."); |
3631 | return -1; | |
3632 | } | |
763429b6 | 3633 | |
7a96a068 CB |
3634 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3635 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3636 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3637 | c->lxc_conf->rootfs.path)) { |
3638 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3639 | return -1; |
3640 | } | |
763429b6 | 3641 | |
eee59f94 SH |
3642 | if (flags & LXC_CLONE_SNAPSHOT) |
3643 | copy_rdepends(c, c0); | |
a73846d8 | 3644 | |
dfb31b25 SH |
3645 | if (need_rdep) { |
3646 | if (!add_rdepends(c, c0)) | |
3647 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3648 | c->name, c0->name); |
dfb31b25 SH |
3649 | } |
3650 | ||
3651 | mod_all_rdeps(c, true); | |
3652 | ||
9be53773 SH |
3653 | return 0; |
3654 | } | |
3655 | ||
1354955b SH |
3656 | struct clone_update_data { |
3657 | struct lxc_container *c0; | |
3658 | struct lxc_container *c1; | |
3659 | int flags; | |
3660 | char **hookargs; | |
3661 | }; | |
3662 | ||
3663 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3664 | { |
1354955b SH |
3665 | struct lxc_container *c0 = data->c0; |
3666 | struct lxc_container *c = data->c1; | |
3667 | int flags = data->flags; | |
3668 | char **hookargs = data->hookargs; | |
9be53773 | 3669 | int ret = -1; |
8a22c168 | 3670 | char path[PATH_MAX]; |
10bc1861 | 3671 | struct lxc_storage *bdev; |
9be53773 | 3672 | FILE *fout; |
148e91f5 | 3673 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3674 | |
3675 | /* update hostname in rootfs */ | |
3676 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3677 | ||
1354955b SH |
3678 | if (setgid(0) < 0) { |
3679 | ERROR("Failed to setgid to 0"); | |
3680 | return -1; | |
3681 | } | |
a73846d8 | 3682 | |
1354955b SH |
3683 | if (setuid(0) < 0) { |
3684 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3685 | return -1; |
1354955b | 3686 | } |
a73846d8 | 3687 | |
c476bdce SH |
3688 | if (setgroups(0, NULL) < 0) |
3689 | WARN("Failed to clear groups"); | |
9be53773 | 3690 | |
1354955b SH |
3691 | if (unshare(CLONE_NEWNS) < 0) |
3692 | return -1; | |
a73846d8 | 3693 | |
8a388ed4 | 3694 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3695 | if (!bdev) |
1354955b | 3696 | return -1; |
a73846d8 | 3697 | |
cf3ef16d SH |
3698 | if (strcmp(bdev->type, "dir") != 0) { |
3699 | if (unshare(CLONE_NEWNS) < 0) { | |
3700 | ERROR("error unsharing mounts"); | |
10bc1861 | 3701 | storage_put(bdev); |
1354955b | 3702 | return -1; |
cf3ef16d | 3703 | } |
a73846d8 | 3704 | |
2c6f3fc9 SH |
3705 | if (detect_shared_rootfs()) { |
3706 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3707 | SYSERROR("Failed to make / rslave"); | |
3708 | ERROR("Continuing..."); | |
3709 | } | |
3710 | } | |
a73846d8 | 3711 | |
e7de366c | 3712 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3713 | storage_put(bdev); |
1354955b | 3714 | return -1; |
e7de366c | 3715 | } |
1a0e70ac | 3716 | } else { /* TODO come up with a better way */ |
f10fad2f | 3717 | free(bdev->dest); |
3d7e738a | 3718 | bdev->dest = strdup(lxc_storage_get_path(bdev->src, bdev->type)); |
cf3ef16d | 3719 | } |
148e91f5 SH |
3720 | |
3721 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3722 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3723 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3724 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3725 | |
3726 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3727 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3728 | |
3729 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3730 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3731 | |
3732 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3733 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3734 | |
3735 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3736 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3737 | |
14a7b0f9 | 3738 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3739 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3740 | storage_put(bdev); |
1354955b | 3741 | return -1; |
148e91f5 SH |
3742 | } |
3743 | } | |
3744 | ||
3745 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
8a22c168 | 3746 | ret = snprintf(path, PATH_MAX, "%s/etc/hostname", bdev->dest); |
10bc1861 | 3747 | storage_put(bdev); |
e7de366c | 3748 | |
8a22c168 | 3749 | if (ret < 0 || ret >= PATH_MAX) |
1354955b | 3750 | return -1; |
a73846d8 | 3751 | |
8058be39 | 3752 | if (!file_exists(path)) |
1354955b | 3753 | return 0; |
a73846d8 | 3754 | |
148e91f5 | 3755 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 3756 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3757 | return 0; |
148e91f5 | 3758 | } |
a73846d8 | 3759 | |
a684f0b7 ÇO |
3760 | if (fprintf(fout, "%s", c->name) < 0) { |
3761 | fclose(fout); | |
1354955b | 3762 | return -1; |
6849cb5b | 3763 | } |
a73846d8 | 3764 | |
148e91f5 | 3765 | if (fclose(fout) < 0) |
1354955b | 3766 | return -1; |
10bc1861 CB |
3767 | } else { |
3768 | storage_put(bdev); | |
9be53773 | 3769 | } |
e7de366c | 3770 | |
1354955b SH |
3771 | return 0; |
3772 | } | |
3773 | ||
3774 | static int clone_update_rootfs_wrapper(void *data) | |
3775 | { | |
3776 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3777 | return clone_update_rootfs(arg); | |
9be53773 SH |
3778 | } |
3779 | ||
3780 | /* | |
3781 | * We want to support: | |
3782 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3783 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3784 | ||
ba115175 CB |
3785 | -s [ implies overlay] |
3786 | -s -B overlay | |
9be53773 SH |
3787 | |
3788 | only rootfs gets converted (copied/snapshotted) on clone. | |
3789 | */ | |
3790 | ||
d5752559 | 3791 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3792 | { |
c32981c3 | 3793 | char *p = strrchr(path, '/'); |
d5752559 | 3794 | int ret = -1; |
9be53773 SH |
3795 | |
3796 | if (!p) | |
3797 | return -1; | |
a73846d8 | 3798 | |
9be53773 | 3799 | *p = '\0'; |
d028235d | 3800 | ret = do_create_container_dir(path, conf); |
9be53773 | 3801 | *p = '/'; |
a73846d8 | 3802 | |
9be53773 SH |
3803 | return ret; |
3804 | } | |
3805 | ||
858377e4 | 3806 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3807 | const char *lxcpath, int flags, |
d659597e | 3808 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3809 | char **hookargs) |
9be53773 | 3810 | { |
8a22c168 | 3811 | char newpath[PATH_MAX]; |
0e1a60b0 | 3812 | int fd, ret; |
1354955b | 3813 | struct clone_update_data data; |
3b392519 | 3814 | size_t saved_unexp_len; |
1354955b | 3815 | pid_t pid; |
17a367d8 CB |
3816 | int storage_copied = 0; |
3817 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3818 | struct lxc_container *c2 = NULL; | |
9be53773 | 3819 | |
858377e4 | 3820 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3821 | return NULL; |
3822 | ||
5cee8c50 | 3823 | if (container_mem_lock(c)) |
9be53773 | 3824 | return NULL; |
754076f5 BH |
3825 | if (!is_stopped(c) && !(flags & LXC_CLONE_ALLOW_RUNNING)) { |
3826 | ERROR("error: Original container (%s) is running. Use --allowrunning if you want to force a snapshot of the running container.", c->name); | |
9be53773 SH |
3827 | goto out; |
3828 | } | |
3829 | ||
1a0e70ac | 3830 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3831 | if (!newname) |
3832 | newname = c->name; | |
a73846d8 | 3833 | |
05d53f4c | 3834 | if (!lxcpath) |
858377e4 | 3835 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3836 | |
8a22c168 CB |
3837 | ret = snprintf(newpath, PATH_MAX, "%s/%s/config", lxcpath, newname); |
3838 | if (ret < 0 || ret >= PATH_MAX) { | |
9be53773 SH |
3839 | SYSERROR("clone: failed making config pathname"); |
3840 | goto out; | |
3841 | } | |
17a367d8 | 3842 | |
9be53773 SH |
3843 | if (file_exists(newpath)) { |
3844 | ERROR("error: clone: %s exists", newpath); | |
3845 | goto out; | |
3846 | } | |
3847 | ||
d5752559 | 3848 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3849 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3850 | ERROR("Error creating container dir for %s", newpath); |
3851 | goto out; | |
3852 | } | |
3853 | ||
1a0e70ac | 3854 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3855 | if (c->lxc_conf->rootfs.path) { |
3856 | origroot = c->lxc_conf->rootfs.path; | |
3857 | c->lxc_conf->rootfs.path = NULL; | |
3858 | } | |
0e1a60b0 CB |
3859 | |
3860 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3861 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3862 | if (fd < 0) { |
3863 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3864 | goto out; |
3865 | } | |
5eea90e8 SH |
3866 | |
3867 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3868 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3869 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3870 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3871 | close(fd); |
5eea90e8 SH |
3872 | goto out; |
3873 | } | |
7a96a068 | 3874 | |
7a96a068 | 3875 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3876 | write_config(fd, c->lxc_conf); |
3877 | close(fd); | |
a73846d8 | 3878 | |
8d2efe40 | 3879 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3880 | |
5eea90e8 SH |
3881 | free(c->lxc_conf->unexpanded_config); |
3882 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3883 | saved_unexp_conf = NULL; | |
3b392519 | 3884 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3885 | |
8a22c168 CB |
3886 | ret = snprintf(newpath, PATH_MAX, "%s/%s/rootfs", lxcpath, newname); |
3887 | if (ret < 0 || ret >= PATH_MAX) { | |
90b366fc CB |
3888 | SYSERROR("clone: failed making rootfs pathname"); |
3889 | goto out; | |
3890 | } | |
17a367d8 CB |
3891 | |
3892 | ret = mkdir(newpath, 0755); | |
3893 | if (ret < 0) { | |
3894 | /* For an overlay container the rootfs is considered immutable | |
3895 | * and will not have been removed when restoring from a | |
3896 | * snapshot. | |
3897 | */ | |
3898 | if (errno != ENOENT && | |
3899 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3900 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3901 | goto out; | |
3902 | } | |
9be53773 SH |
3903 | } |
3904 | ||
e0010464 | 3905 | if (am_guest_unpriv()) { |
1354955b | 3906 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3907 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3908 | goto out; |
3909 | } | |
3910 | } | |
3911 | ||
05d53f4c | 3912 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3913 | if (!c2) { |
05d53f4c SH |
3914 | ERROR("clone: failed to create new container (%s %s)", newname, |
3915 | lxcpath); | |
9be53773 SH |
3916 | goto out; |
3917 | } | |
8d2efe40 | 3918 | |
1a0e70ac | 3919 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3920 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3921 | if (ret < 0) | |
3922 | goto out; | |
9be53773 | 3923 | |
1a0e70ac | 3924 | /* update utsname */ |
3d7ad474 CB |
3925 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3926 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3927 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3928 | |
0d9cd9c3 | 3929 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3930 | ERROR("Error setting new hostname"); |
3931 | goto out; | |
3932 | } | |
96532523 SH |
3933 | } |
3934 | ||
1a0e70ac | 3935 | /* copy hooks */ |
619256b5 ÇO |
3936 | ret = copyhooks(c, c2); |
3937 | if (ret < 0) { | |
3938 | ERROR("error copying hooks"); | |
3939 | goto out; | |
9be53773 SH |
3940 | } |
3941 | ||
3942 | if (copy_fstab(c, c2) < 0) { | |
3943 | ERROR("error copying fstab"); | |
9be53773 SH |
3944 | goto out; |
3945 | } | |
3946 | ||
1a0e70ac | 3947 | /* update macaddrs */ |
6b0d5538 | 3948 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3949 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3950 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3951 | goto out; |
3952 | } | |
3953 | } | |
9be53773 | 3954 | |
1a0e70ac | 3955 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3956 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3957 | goto out; |
3958 | ||
1a0e70ac CB |
3959 | /* We've now successfully created c2's storage, so clear it out if we |
3960 | * fail after this. | |
3961 | */ | |
176d9acb SH |
3962 | storage_copied = 1; |
3963 | ||
375c2258 | 3964 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3965 | goto out; |
9be53773 | 3966 | |
1354955b SH |
3967 | if ((pid = fork()) < 0) { |
3968 | SYSERROR("fork"); | |
9be53773 | 3969 | goto out; |
1354955b | 3970 | } |
a73846d8 | 3971 | |
1354955b SH |
3972 | if (pid > 0) { |
3973 | ret = wait_for_pid(pid); | |
3974 | if (ret) | |
3975 | goto out; | |
a73846d8 | 3976 | |
1354955b SH |
3977 | container_mem_unlock(c); |
3978 | return c2; | |
3979 | } | |
a73846d8 | 3980 | |
1354955b SH |
3981 | data.c0 = c; |
3982 | data.c1 = c2; | |
3983 | data.flags = flags; | |
3984 | data.hookargs = hookargs; | |
a73846d8 | 3985 | |
e0010464 | 3986 | if (am_guest_unpriv()) |
ee484f7f CB |
3987 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3988 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3989 | else |
3990 | ret = clone_update_rootfs(&data); | |
3991 | if (ret < 0) | |
d8480a31 | 3992 | _exit(EXIT_FAILURE); |
9be53773 | 3993 | |
5cee8c50 | 3994 | container_mem_unlock(c); |
d8480a31 | 3995 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3996 | |
3997 | out: | |
5cee8c50 | 3998 | container_mem_unlock(c); |
375c2258 | 3999 | if (c2) { |
176d9acb SH |
4000 | if (!storage_copied) |
4001 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 4002 | |
375c2258 | 4003 | c2->destroy(c2); |
9be53773 | 4004 | lxc_container_put(c2); |
375c2258 | 4005 | } |
9be53773 SH |
4006 | |
4007 | return NULL; | |
4008 | } | |
4009 | ||
858377e4 SH |
4010 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
4011 | const char *lxcpath, int flags, | |
4012 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
4013 | char **hookargs) | |
4014 | { | |
4015 | struct lxc_container * ret; | |
a73846d8 | 4016 | |
858377e4 SH |
4017 | current_config = c ? c->lxc_conf : NULL; |
4018 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
4019 | current_config = NULL; | |
a73846d8 | 4020 | |
858377e4 SH |
4021 | return ret; |
4022 | } | |
4023 | ||
4024 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 4025 | { |
10bc1861 | 4026 | struct lxc_storage *bdev; |
06e5650e | 4027 | struct lxc_container *newc; |
06e5650e | 4028 | |
d693cf93 | 4029 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
4030 | return false; |
4031 | ||
18aa217b SH |
4032 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4033 | ERROR("Renaming a container with snapshots is not supported"); | |
4034 | return false; | |
4035 | } | |
a73846d8 | 4036 | |
8a388ed4 | 4037 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4038 | if (!bdev) { |
4039 | ERROR("Failed to find original backing store type"); | |
4040 | return false; | |
4041 | } | |
4042 | ||
619256b5 | 4043 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4044 | storage_put(bdev); |
06e5650e ÇO |
4045 | if (!newc) { |
4046 | lxc_container_put(newc); | |
4047 | return false; | |
4048 | } | |
4049 | ||
4050 | if (newc && lxcapi_is_defined(newc)) | |
4051 | lxc_container_put(newc); | |
4052 | ||
17a367d8 | 4053 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4054 | ERROR("Could not destroy existing container %s", c->name); |
4055 | return false; | |
4056 | } | |
a73846d8 | 4057 | |
06e5650e ÇO |
4058 | return true; |
4059 | } | |
4060 | ||
858377e4 SH |
4061 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4062 | ||
d6430143 CB |
4063 | static int lxcapi_attach(struct lxc_container *c, |
4064 | lxc_attach_exec_t exec_function, void *exec_payload, | |
4065 | lxc_attach_options_t *options, pid_t *attached_process) | |
a0e93eeb | 4066 | { |
858377e4 SH |
4067 | int ret; |
4068 | ||
a0e93eeb CS |
4069 | if (!c) |
4070 | return -1; | |
4071 | ||
858377e4 SH |
4072 | current_config = c->lxc_conf; |
4073 | ||
d6430143 CB |
4074 | ret = lxc_attach(c, exec_function, exec_payload, options, |
4075 | attached_process); | |
858377e4 SH |
4076 | current_config = NULL; |
4077 | return ret; | |
a0e93eeb CS |
4078 | } |
4079 | ||
d6430143 CB |
4080 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, |
4081 | lxc_attach_options_t *options, | |
4082 | const char *program, | |
4083 | const char *const argv[]) | |
a0e93eeb CS |
4084 | { |
4085 | lxc_attach_command_t command; | |
4086 | pid_t pid; | |
d6430143 | 4087 | int ret; |
a0e93eeb CS |
4088 | |
4089 | if (!c) | |
4090 | return -1; | |
4091 | ||
d6430143 CB |
4092 | command.program = (char *)program; |
4093 | command.argv = (char **)argv; | |
a73846d8 | 4094 | |
d6430143 CB |
4095 | ret = lxc_attach(c, lxc_attach_run_command, &command, options, &pid); |
4096 | if (ret < 0) | |
4097 | return ret; | |
a73846d8 | 4098 | |
a0e93eeb CS |
4099 | return lxc_wait_for_pid_status(pid); |
4100 | } | |
4101 | ||
d6430143 CB |
4102 | static int lxcapi_attach_run_wait(struct lxc_container *c, |
4103 | lxc_attach_options_t *options, | |
4104 | const char *program, const char *const argv[]) | |
858377e4 SH |
4105 | { |
4106 | int ret; | |
a73846d8 | 4107 | |
858377e4 SH |
4108 | current_config = c ? c->lxc_conf : NULL; |
4109 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4110 | current_config = NULL; | |
a73846d8 | 4111 | |
858377e4 SH |
4112 | return ret; |
4113 | } | |
4114 | ||
74a3920a | 4115 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 | 4116 | { |
7a99b5a0 | 4117 | __do_free char *fname = NULL; |
f5dd1d53 SH |
4118 | struct stat sb; |
4119 | int i = 0, ret; | |
4120 | ||
f5849fd7 | 4121 | fname = must_realloc(NULL, strlen(lxcpath) + 20); |
a73846d8 | 4122 | |
51a8a74c | 4123 | for (;;) { |
f5dd1d53 | 4124 | sprintf(fname, "%s/snap%d", lxcpath, i); |
a73846d8 | 4125 | |
f5dd1d53 SH |
4126 | ret = stat(fname, &sb); |
4127 | if (ret != 0) | |
4128 | return i; | |
a73846d8 | 4129 | |
f5dd1d53 SH |
4130 | i++; |
4131 | } | |
4132 | } | |
4133 | ||
18aa217b SH |
4134 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4135 | { | |
4136 | int ret; | |
a73846d8 | 4137 | |
18aa217b SH |
4138 | /* |
4139 | * If the old style snapshot path exists, use it | |
4140 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4141 | */ | |
8a22c168 CB |
4142 | ret = snprintf(snappath, PATH_MAX, "%ssnaps", c->config_path); |
4143 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4144 | return false; |
a73846d8 | 4145 | |
18aa217b | 4146 | if (dir_exists(snappath)) { |
8a22c168 CB |
4147 | ret = snprintf(snappath, PATH_MAX, "%ssnaps/%s", c->config_path, c->name); |
4148 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4149 | return false; |
a73846d8 | 4150 | |
18aa217b SH |
4151 | return true; |
4152 | } | |
4153 | ||
4154 | /* | |
4155 | * Use the new style path | |
4156 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4157 | */ | |
8a22c168 CB |
4158 | ret = snprintf(snappath, PATH_MAX, "%s/%s/snaps", c->config_path, c->name); |
4159 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4160 | return false; |
a73846d8 | 4161 | |
18aa217b SH |
4162 | return true; |
4163 | } | |
4164 | ||
858377e4 | 4165 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 | 4166 | { |
f5849fd7 | 4167 | __do_free char *dfnam = NULL; |
f5dd1d53 | 4168 | int i, flags, ret; |
df05fa0f | 4169 | time_t timer; |
4170 | struct tm tm_info; | |
f5dd1d53 | 4171 | struct lxc_container *c2; |
8a22c168 | 4172 | char snappath[PATH_MAX], newname[20]; |
df05fa0f | 4173 | char buffer[25]; |
4174 | FILE *f; | |
f5dd1d53 | 4175 | |
840f05df SH |
4176 | if (!c || !lxcapi_is_defined(c)) |
4177 | return -1; | |
4178 | ||
10bc1861 | 4179 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4180 | ERROR("%s's backing store cannot be backed up", c->name); |
4181 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4182 | return -1; |
4183 | } | |
4184 | ||
18aa217b | 4185 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4186 | return -1; |
18aa217b | 4187 | |
f5dd1d53 SH |
4188 | i = get_next_index(snappath, c->name); |
4189 | ||
4190 | if (mkdir_p(snappath, 0755) < 0) { | |
4191 | ERROR("Failed to create snapshot directory %s", snappath); | |
4192 | return -1; | |
4193 | } | |
4194 | ||
4195 | ret = snprintf(newname, 20, "snap%d", i); | |
4196 | if (ret < 0 || ret >= 20) | |
4197 | return -1; | |
4198 | ||
0a83cbbb SH |
4199 | /* |
4200 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4201 | * created in the original container | |
4202 | */ | |
4203 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4204 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4205 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4206 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4207 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4208 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4209 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4210 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4211 | } | |
a73846d8 | 4212 | |
858377e4 | 4213 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4214 | if (!c2) { |
df05fa0f | 4215 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4216 | return -1; |
4217 | } | |
4218 | ||
4219 | lxc_container_put(c2); | |
4220 | ||
1a0e70ac | 4221 | /* Now write down the creation time. */ |
f5dd1d53 | 4222 | time(&timer); |
f5dd1d53 | 4223 | |
df05fa0f | 4224 | if (!localtime_r(&timer, &tm_info)) { |
4225 | ERROR("Failed to get localtime"); | |
4226 | return -1; | |
4227 | } | |
4228 | ||
4229 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 | 4230 | |
f5849fd7 | 4231 | dfnam = must_realloc(NULL, strlen(snappath) + strlen(newname) + 5); |
f5dd1d53 | 4232 | sprintf(dfnam, "%s/%s/ts", snappath, newname); |
025ed0f3 | 4233 | f = fopen(dfnam, "w"); |
f5dd1d53 | 4234 | if (!f) { |
959aee9c | 4235 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4236 | return -1; |
4237 | } | |
a73846d8 | 4238 | |
f5dd1d53 SH |
4239 | if (fprintf(f, "%s", buffer) < 0) { |
4240 | SYSERROR("Writing timestamp"); | |
4241 | fclose(f); | |
4242 | return -1; | |
4243 | } | |
a73846d8 | 4244 | |
025ed0f3 | 4245 | ret = fclose(f); |
025ed0f3 | 4246 | if (ret != 0) { |
f5dd1d53 SH |
4247 | SYSERROR("Writing timestamp"); |
4248 | return -1; | |
4249 | } | |
4250 | ||
4251 | if (commentfile) { | |
7a99b5a0 | 4252 | __do_free char *path = NULL; |
1a0e70ac | 4253 | /* $p / $name / comment \0 */ |
f5dd1d53 | 4254 | int len = strlen(snappath) + strlen(newname) + 10; |
a73846d8 | 4255 | |
f5849fd7 | 4256 | path = must_realloc(NULL, len); |
f5dd1d53 SH |
4257 | sprintf(path, "%s/%s/comment", snappath, newname); |
4258 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
4259 | } | |
4260 | ||
4261 | return i; | |
4262 | } | |
4263 | ||
858377e4 SH |
4264 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4265 | ||
f5dd1d53 SH |
4266 | static void lxcsnap_free(struct lxc_snapshot *s) |
4267 | { | |
f10fad2f ME |
4268 | free(s->name); |
4269 | free(s->comment_pathname); | |
4270 | free(s->timestamp); | |
4271 | free(s->lxcpath); | |
f5dd1d53 SH |
4272 | } |
4273 | ||
4274 | static char *get_snapcomment_path(char* snappath, char *name) | |
4275 | { | |
1a0e70ac | 4276 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4277 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4278 | char *s = malloc(len); | |
4279 | ||
4280 | if (s) { | |
4281 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4282 | if (ret < 0 || ret >= len) { | |
4283 | free(s); | |
4284 | s = NULL; | |
4285 | } | |
4286 | } | |
a73846d8 | 4287 | |
f5dd1d53 SH |
4288 | return s; |
4289 | } | |
4290 | ||
4291 | static char *get_timestamp(char* snappath, char *name) | |
4292 | { | |
8a22c168 | 4293 | char path[PATH_MAX], *s = NULL; |
f5dd1d53 SH |
4294 | int ret, len; |
4295 | FILE *fin; | |
4296 | ||
8a22c168 CB |
4297 | ret = snprintf(path, PATH_MAX, "%s/%s/ts", snappath, name); |
4298 | if (ret < 0 || ret >= PATH_MAX) | |
f5dd1d53 | 4299 | return NULL; |
a73846d8 | 4300 | |
025ed0f3 | 4301 | fin = fopen(path, "r"); |
025ed0f3 | 4302 | if (!fin) |
f5dd1d53 | 4303 | return NULL; |
a73846d8 | 4304 | |
f5dd1d53 SH |
4305 | (void) fseek(fin, 0, SEEK_END); |
4306 | len = ftell(fin); | |
4307 | (void) fseek(fin, 0, SEEK_SET); | |
4308 | if (len > 0) { | |
4309 | s = malloc(len+1); | |
4310 | if (s) { | |
4311 | s[len] = '\0'; | |
4312 | if (fread(s, 1, len, fin) != len) { | |
4313 | SYSERROR("reading timestamp"); | |
4314 | free(s); | |
4315 | s = NULL; | |
4316 | } | |
4317 | } | |
4318 | } | |
a73846d8 | 4319 | |
f5dd1d53 SH |
4320 | fclose(fin); |
4321 | return s; | |
4322 | } | |
4323 | ||
858377e4 | 4324 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 | 4325 | { |
8a22c168 | 4326 | char snappath[PATH_MAX], path2[PATH_MAX]; |
18aa217b | 4327 | int count = 0, ret; |
74f96976 | 4328 | struct dirent *direntp; |
f5dd1d53 SH |
4329 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
4330 | DIR *dir; | |
4331 | ||
4332 | if (!c || !lxcapi_is_defined(c)) | |
4333 | return -1; | |
c868b261 | 4334 | |
18aa217b | 4335 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4336 | ERROR("path name too long"); |
4337 | return -1; | |
4338 | } | |
a73846d8 | 4339 | |
025ed0f3 | 4340 | dir = opendir(snappath); |
025ed0f3 | 4341 | if (!dir) { |
a73846d8 | 4342 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4343 | return 0; |
4344 | } | |
4345 | ||
74f96976 | 4346 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4347 | if (!strcmp(direntp->d_name, ".")) |
4348 | continue; | |
4349 | ||
4350 | if (!strcmp(direntp->d_name, "..")) | |
4351 | continue; | |
4352 | ||
8a22c168 CB |
4353 | ret = snprintf(path2, PATH_MAX, "%s/%s/config", snappath, direntp->d_name); |
4354 | if (ret < 0 || ret >= PATH_MAX) { | |
f5dd1d53 SH |
4355 | ERROR("pathname too long"); |
4356 | goto out_free; | |
4357 | } | |
a73846d8 | 4358 | |
f5dd1d53 SH |
4359 | if (!file_exists(path2)) |
4360 | continue; | |
a73846d8 | 4361 | |
f5dd1d53 SH |
4362 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4363 | if (!nsnaps) { | |
4364 | SYSERROR("Out of memory"); | |
4365 | goto out_free; | |
4366 | } | |
a73846d8 | 4367 | |
f5dd1d53 SH |
4368 | snaps = nsnaps; |
4369 | snaps[count].free = lxcsnap_free; | |
4370 | snaps[count].name = strdup(direntp->d_name); | |
4371 | if (!snaps[count].name) | |
4372 | goto out_free; | |
a73846d8 | 4373 | |
f5dd1d53 SH |
4374 | snaps[count].lxcpath = strdup(snappath); |
4375 | if (!snaps[count].lxcpath) { | |
4376 | free(snaps[count].name); | |
4377 | goto out_free; | |
4378 | } | |
a73846d8 | 4379 | |
f5dd1d53 SH |
4380 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4381 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4382 | count++; | |
4383 | } | |
4384 | ||
4385 | if (closedir(dir)) | |
a73846d8 | 4386 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4387 | |
4388 | *ret_snaps = snaps; | |
4389 | return count; | |
4390 | ||
4391 | out_free: | |
4392 | if (snaps) { | |
4393 | int i; | |
a73846d8 | 4394 | |
f5dd1d53 SH |
4395 | for (i=0; i<count; i++) |
4396 | lxcsnap_free(&snaps[i]); | |
a73846d8 | 4397 | |
f5dd1d53 SH |
4398 | free(snaps); |
4399 | } | |
a73846d8 | 4400 | |
9baa57bd | 4401 | if (closedir(dir)) |
a73846d8 | 4402 | WARN("Failed to close directory"); |
4403 | ||
f5dd1d53 SH |
4404 | return -1; |
4405 | } | |
4406 | ||
858377e4 SH |
4407 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4408 | ||
4409 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 | 4410 | { |
8a22c168 | 4411 | char clonelxcpath[PATH_MAX]; |
18aa217b | 4412 | int flags = 0; |
f5dd1d53 | 4413 | struct lxc_container *snap, *rest; |
10bc1861 | 4414 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4415 | bool b = false; |
4416 | ||
4417 | if (!c || !c->name || !c->config_path) | |
4418 | return false; | |
4419 | ||
18aa217b SH |
4420 | if (has_fs_snapshots(c)) { |
4421 | ERROR("container rootfs has dependent snapshots"); | |
4422 | return false; | |
4423 | } | |
4424 | ||
8a388ed4 | 4425 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4426 | if (!bdev) { |
4427 | ERROR("Failed to find original backing store type"); | |
4428 | return false; | |
4429 | } | |
4430 | ||
17a367d8 CB |
4431 | /* For an overlay container the rootfs is considered immutable |
4432 | * and cannot be removed when restoring from a snapshot. We pass this | |
4433 | * internal flag along to communicate this to various parts of the | |
4434 | * codebase. | |
4435 | */ | |
4436 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4437 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4438 | ||
f5dd1d53 SH |
4439 | if (!newname) |
4440 | newname = c->name; | |
7e36f87e | 4441 | |
18aa217b | 4442 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4443 | storage_put(bdev); |
f5dd1d53 SH |
4444 | return false; |
4445 | } | |
1a0e70ac | 4446 | /* how should we lock this? */ |
f5dd1d53 SH |
4447 | |
4448 | snap = lxc_container_new(snapname, clonelxcpath); | |
4449 | if (!snap || !lxcapi_is_defined(snap)) { | |
4450 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4451 | |
17a367d8 CB |
4452 | if (snap) |
4453 | lxc_container_put(snap); | |
a73846d8 | 4454 | |
10bc1861 | 4455 | storage_put(bdev); |
f5dd1d53 SH |
4456 | return false; |
4457 | } | |
4458 | ||
17a367d8 CB |
4459 | if (!strcmp(c->name, newname)) { |
4460 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4461 | ERROR("Could not destroy existing container %s", newname); |
4462 | lxc_container_put(snap); | |
10bc1861 | 4463 | storage_put(bdev); |
7e36f87e ÇO |
4464 | return false; |
4465 | } | |
4466 | } | |
4467 | ||
de269ee8 SH |
4468 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4469 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4470 | |
4471 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4472 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4473 | |
09f6f8c4 CB |
4474 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4475 | NULL, 0, NULL); | |
10bc1861 | 4476 | storage_put(bdev); |
f5dd1d53 SH |
4477 | if (rest && lxcapi_is_defined(rest)) |
4478 | b = true; | |
a73846d8 | 4479 | |
f5dd1d53 SH |
4480 | if (rest) |
4481 | lxc_container_put(rest); | |
17a367d8 | 4482 | |
f5dd1d53 SH |
4483 | lxc_container_put(snap); |
4484 | return b; | |
4485 | } | |
4486 | ||
858377e4 SH |
4487 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4488 | ||
18aa217b | 4489 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4490 | { |
771d96b3 | 4491 | struct lxc_container *snap = NULL; |
18aa217b | 4492 | bool bret = false; |
771d96b3 ÇO |
4493 | |
4494 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4495 | if (!snap) { |
771d96b3 ÇO |
4496 | ERROR("Could not find snapshot %s", snapname); |
4497 | goto err; | |
4498 | } | |
4499 | ||
858377e4 | 4500 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4501 | ERROR("Could not destroy snapshot %s", snapname); |
4502 | goto err; | |
4503 | } | |
a73846d8 | 4504 | |
18aa217b | 4505 | bret = true; |
771d96b3 | 4506 | |
771d96b3 ÇO |
4507 | err: |
4508 | if (snap) | |
4509 | lxc_container_put(snap); | |
a73846d8 | 4510 | |
18aa217b SH |
4511 | return bret; |
4512 | } | |
4513 | ||
4514 | static bool remove_all_snapshots(const char *path) | |
4515 | { | |
4516 | DIR *dir; | |
74f96976 | 4517 | struct dirent *direntp; |
18aa217b SH |
4518 | bool bret = true; |
4519 | ||
4520 | dir = opendir(path); | |
4521 | if (!dir) { | |
4522 | SYSERROR("opendir on snapshot path %s", path); | |
4523 | return false; | |
4524 | } | |
a73846d8 | 4525 | |
74f96976 | 4526 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4527 | if (!strcmp(direntp->d_name, ".")) |
4528 | continue; | |
a73846d8 | 4529 | |
18aa217b SH |
4530 | if (!strcmp(direntp->d_name, "..")) |
4531 | continue; | |
a73846d8 | 4532 | |
18aa217b SH |
4533 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4534 | bret = false; | |
4535 | continue; | |
4536 | } | |
4537 | } | |
4538 | ||
4539 | closedir(dir); | |
4540 | ||
4541 | if (rmdir(path)) | |
4542 | SYSERROR("Error removing directory %s", path); | |
4543 | ||
4544 | return bret; | |
4545 | } | |
4546 | ||
858377e4 | 4547 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b | 4548 | { |
8a22c168 | 4549 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4550 | |
4551 | if (!c || !c->name || !c->config_path || !snapname) | |
4552 | return false; | |
4553 | ||
4554 | if (!get_snappath_dir(c, clonelxcpath)) | |
4555 | return false; | |
4556 | ||
4557 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4558 | } | |
4559 | ||
858377e4 SH |
4560 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4561 | ||
4562 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b | 4563 | { |
8a22c168 | 4564 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4565 | |
4566 | if (!c || !c->name || !c->config_path) | |
4567 | return false; | |
4568 | ||
4569 | if (!get_snappath_dir(c, clonelxcpath)) | |
4570 | return false; | |
4571 | ||
4572 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4573 | } |
4574 | ||
858377e4 SH |
4575 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4576 | ||
4577 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4578 | { |
5106ecd0 | 4579 | if (!c) |
4580 | return false; | |
4581 | ||
b494d2dd SH |
4582 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4583 | } | |
4584 | ||
858377e4 SH |
4585 | WRAP_API(bool, lxcapi_may_control) |
4586 | ||
d5aa23e6 | 4587 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4588 | struct stat *st) |
d5aa23e6 | 4589 | { |
b69dfc9f CB |
4590 | int ret; |
4591 | char *tmp; | |
4592 | pid_t pid; | |
8a22c168 | 4593 | char chrootpath[PATH_MAX]; |
d5aa23e6 | 4594 | char *directory_path = NULL; |
d5aa23e6 | 4595 | |
b69dfc9f CB |
4596 | pid = fork(); |
4597 | if (pid < 0) { | |
4598 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4599 | return false; |
4600 | } | |
b69dfc9f | 4601 | |
d5aa23e6 | 4602 | if (pid) { |
b69dfc9f CB |
4603 | ret = wait_for_pid(pid); |
4604 | if (ret != 0) { | |
4605 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4606 | return false; |
4607 | } | |
b69dfc9f | 4608 | |
d5aa23e6 SH |
4609 | return true; |
4610 | } | |
4611 | ||
4612 | /* prepare the path */ | |
8a22c168 CB |
4613 | ret = snprintf(chrootpath, PATH_MAX, "/proc/%d/root", init_pid); |
4614 | if (ret < 0 || ret >= PATH_MAX) | |
d5aa23e6 SH |
4615 | return false; |
4616 | ||
b69dfc9f CB |
4617 | ret = chroot(chrootpath); |
4618 | if (ret < 0) | |
a7764ce7 | 4619 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4620 | |
4621 | ret = chdir("/"); | |
4622 | if (ret < 0) | |
a7764ce7 | 4623 | _exit(EXIT_FAILURE); |
b69dfc9f | 4624 | |
d5aa23e6 | 4625 | /* remove path if it exists */ |
b69dfc9f CB |
4626 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4627 | if(ret == 0) { | |
4628 | ret = unlink(path); | |
c7d76c09 | 4629 | if (ret < 0) { |
6d1400b5 | 4630 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4631 | _exit(EXIT_FAILURE); |
c7d76c09 | 4632 | } |
d5aa23e6 | 4633 | } |
b69dfc9f | 4634 | |
d5aa23e6 | 4635 | if (!add) |
a7764ce7 | 4636 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4637 | |
4638 | /* create any missing directories */ | |
b69dfc9f CB |
4639 | tmp = strdup(path); |
4640 | if (!tmp) | |
a7764ce7 | 4641 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4642 | |
4643 | directory_path = dirname(tmp); | |
4644 | ret = mkdir_p(directory_path, 0755); | |
4645 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4646 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4647 | free(tmp); |
a7764ce7 | 4648 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4649 | } |
4650 | ||
4651 | /* create the device node */ | |
b69dfc9f CB |
4652 | ret = mknod(path, st->st_mode, st->st_rdev); |
4653 | free(tmp); | |
c7d76c09 | 4654 | if (ret < 0) { |
6d1400b5 | 4655 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4656 | _exit(EXIT_FAILURE); |
c7d76c09 | 4657 | } |
d5aa23e6 | 4658 | |
a7764ce7 | 4659 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4660 | } |
4661 | ||
f0ca2726 | 4662 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4663 | { |
4664 | int ret; | |
4665 | struct stat st; | |
238b3e5e | 4666 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4667 | const char *p; |
caab004f | 4668 | pid_t init_pid; |
a9a0ed90 ÇO |
4669 | |
4670 | /* make sure container is running */ | |
858377e4 | 4671 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4672 | ERROR("container is not running"); |
d5aa23e6 | 4673 | return false; |
a9a0ed90 ÇO |
4674 | } |
4675 | ||
4676 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4677 | p = dest_path ? dest_path : src_path; | |
4678 | ||
a9a0ed90 ÇO |
4679 | /* make sure we can access p */ |
4680 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4681 | return false; |
a9a0ed90 ÇO |
4682 | |
4683 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4684 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4685 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4686 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4687 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4688 | else |
d5aa23e6 | 4689 | return false; |
a9a0ed90 ÇO |
4690 | |
4691 | /* check snprintf return code */ | |
238b3e5e | 4692 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4693 | return false; |
a9a0ed90 | 4694 | |
caab004f TA |
4695 | init_pid = do_lxcapi_init_pid(c); |
4696 | if (init_pid < 0) { | |
4697 | ERROR("Failed to get init pid"); | |
4698 | return false; | |
4699 | } | |
4700 | ||
4701 | if (!do_add_remove_node(init_pid, p, add, &st)) | |
d5aa23e6 | 4702 | return false; |
a9a0ed90 | 4703 | |
d5aa23e6 | 4704 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4705 | if (add) { |
858377e4 | 4706 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4707 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4708 | return false; |
a9a0ed90 ÇO |
4709 | } |
4710 | } else { | |
858377e4 | 4711 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4712 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4713 | return false; |
a9a0ed90 ÇO |
4714 | } |
4715 | } | |
d5aa23e6 | 4716 | |
a9a0ed90 | 4717 | return true; |
a9a0ed90 ÇO |
4718 | } |
4719 | ||
858377e4 | 4720 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4721 | { |
e0010464 | 4722 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4723 | if (am_host_unpriv()) { |
238b3e5e | 4724 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4725 | return false; |
4726 | } | |
a73846d8 | 4727 | |
a9a0ed90 ÇO |
4728 | return add_remove_device_node(c, src_path, dest_path, true); |
4729 | } | |
4730 | ||
858377e4 SH |
4731 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4732 | ||
4733 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4734 | { |
e0010464 | 4735 | if (am_guest_unpriv()) { |
238b3e5e | 4736 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4737 | return false; |
4738 | } | |
a73846d8 | 4739 | |
a9a0ed90 ÇO |
4740 | return add_remove_device_node(c, src_path, dest_path, false); |
4741 | } | |
4742 | ||
858377e4 SH |
4743 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4744 | ||
c7d76c09 CB |
4745 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4746 | const char *ifname, | |
4747 | const char *dst_ifname) | |
e58fae8f | 4748 | { |
c7d76c09 | 4749 | pid_t init_pid; |
e58fae8f | 4750 | int ret = 0; |
c7d76c09 | 4751 | |
e0010464 | 4752 | if (am_guest_unpriv()) { |
238b3e5e | 4753 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4754 | return false; |
4755 | } | |
4756 | ||
4757 | if (!ifname) { | |
4758 | ERROR("No source interface name given"); | |
4759 | return false; | |
4760 | } | |
4761 | ||
4762 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4763 | if (ret > 0) { |
4764 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4765 | ret = lxc_netdev_down(ifname); |
4766 | if (ret) | |
4767 | goto err; | |
4768 | } | |
4769 | ||
c7d76c09 | 4770 | init_pid = do_lxcapi_init_pid(c); |
caab004f TA |
4771 | if (init_pid < 0) { |
4772 | ERROR("Failed to get init pid"); | |
4773 | goto err; | |
4774 | } | |
4775 | ||
c7d76c09 | 4776 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); |
e58fae8f DY |
4777 | if (ret) |
4778 | goto err; | |
4779 | ||
c7d76c09 | 4780 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4781 | return true; |
e5848d39 | 4782 | |
e58fae8f | 4783 | err: |
e58fae8f DY |
4784 | return false; |
4785 | } | |
4786 | ||
858377e4 SH |
4787 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4788 | ||
c7d76c09 CB |
4789 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4790 | const char *ifname, | |
4791 | const char *dst_ifname) | |
e58fae8f | 4792 | { |
c7d76c09 | 4793 | int ret; |
e58fae8f DY |
4794 | pid_t pid, pid_outside; |
4795 | ||
e0010464 SH |
4796 | /* |
4797 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4798 | * But for other types guest privilege suffices. | |
4799 | */ | |
4800 | if (am_guest_unpriv()) { | |
238b3e5e | 4801 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4802 | return false; |
4803 | } | |
4804 | ||
4805 | if (!ifname) { | |
4806 | ERROR("No source interface name given"); | |
4807 | return false; | |
4808 | } | |
4809 | ||
0059379f | 4810 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4811 | pid = fork(); |
4812 | if (pid < 0) { | |
c7d76c09 | 4813 | ERROR("Failed to fork"); |
e58fae8f DY |
4814 | return false; |
4815 | } | |
4816 | ||
1a0e70ac | 4817 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4818 | pid_t init_pid; |
4819 | ||
4820 | init_pid = do_lxcapi_init_pid(c); | |
caab004f TA |
4821 | if (init_pid < 0) { |
4822 | ERROR("Failed to get init pid"); | |
4823 | _exit(EXIT_FAILURE); | |
4824 | } | |
acbfeda8 CB |
4825 | if (!switch_to_ns(init_pid, "net")) { |
4826 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4827 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4828 | } |
4829 | ||
4830 | ret = lxc_netdev_isup(ifname); | |
c7d76c09 CB |
4831 | if (ret < 0) { |
4832 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4833 | _exit(EXIT_FAILURE); |
c7d76c09 | 4834 | } |
e58fae8f DY |
4835 | |
4836 | /* netdev of ifname is up. */ | |
4837 | if (ret) { | |
4838 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4839 | if (ret) { |
4840 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4841 | _exit(EXIT_FAILURE); |
c7d76c09 | 4842 | } |
e58fae8f DY |
4843 | } |
4844 | ||
4845 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
c7d76c09 CB |
4846 | /* -EINVAL means there is no netdev named as ifname. */ |
4847 | if (ret < 0) { | |
4848 | if (ret == -EINVAL) | |
4849 | ERROR("Network device \"%s\" not found", ifname); | |
4850 | else | |
4851 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4852 | |
8d7b6c25 | 4853 | _exit(EXIT_FAILURE); |
e58fae8f | 4854 | } |
c7d76c09 | 4855 | |
8d7b6c25 | 4856 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4857 | } |
4858 | ||
c7d76c09 CB |
4859 | ret = wait_for_pid(pid); |
4860 | if (ret != 0) | |
e58fae8f DY |
4861 | return false; |
4862 | ||
c7d76c09 | 4863 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4864 | return true; |
4865 | } | |
4866 | ||
858377e4 SH |
4867 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4868 | ||
aef3d51e TA |
4869 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4870 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4871 | { |
6b9be523 | 4872 | int ret = -1; |
2cb80427 | 4873 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4874 | uint64_t features_to_check = 0; |
85c50991 | 4875 | |
aef3d51e TA |
4876 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4877 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4878 | * to do anything special. | |
4879 | */ | |
4880 | if (size > sizeof(*opts)) { | |
4881 | unsigned char *addr; | |
4882 | unsigned char *end; | |
4883 | ||
4884 | addr = (void *)opts + sizeof(*opts); | |
4885 | end = (void *)opts + size; | |
a73846d8 | 4886 | |
4887 | for (; addr < end; addr++) | |
4888 | if (*addr) | |
aef3d51e | 4889 | return -E2BIG; |
85c50991 TA |
4890 | } |
4891 | ||
2cb80427 TA |
4892 | /* If the caller has a smaller struct, let's zero out the end for them |
4893 | * so we don't accidentally use bits of it that they didn't know about | |
4894 | * to initialize. | |
4895 | */ | |
4896 | if (size < sizeof(*opts)) { | |
4897 | valid_opts = malloc(sizeof(*opts)); | |
4898 | if (!valid_opts) | |
4899 | return -ENOMEM; | |
4900 | ||
4901 | memset(valid_opts, 0, sizeof(*opts)); | |
4902 | memcpy(valid_opts, opts, size); | |
4903 | } | |
4904 | ||
aef3d51e TA |
4905 | switch (cmd) { |
4906 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4907 | if (!do_lxcapi_is_running(c)) { |
4908 | ERROR("container is not running"); | |
6b9be523 | 4909 | goto on_error; |
7ad13c91 | 4910 | } |
a73846d8 | 4911 | |
2cb80427 | 4912 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4913 | break; |
4914 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4915 | if (!do_lxcapi_is_running(c)) { |
4916 | ERROR("container is not running"); | |
6b9be523 | 4917 | goto on_error; |
7ad13c91 | 4918 | } |
a73846d8 | 4919 | |
2cb80427 | 4920 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4921 | break; |
4922 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4923 | if (do_lxcapi_is_running(c)) { |
4924 | ERROR("container is already running"); | |
6b9be523 | 4925 | goto on_error; |
7ad13c91 | 4926 | } |
a73846d8 | 4927 | |
2cb80427 | 4928 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4929 | break; |
b5b12b9e AR |
4930 | case MIGRATE_FEATURE_CHECK: |
4931 | features_to_check = valid_opts->features_to_check; | |
4932 | ret = !__criu_check_feature(&features_to_check); | |
4933 | if (ret) { | |
4934 | /* Something went wrong. Let's let the caller | |
4935 | * know which feature checks failed. */ | |
4936 | valid_opts->features_to_check = features_to_check; | |
4937 | } | |
4938 | break; | |
aef3d51e TA |
4939 | default: |
4940 | ERROR("invalid migrate command %u", cmd); | |
4941 | ret = -EINVAL; | |
4942 | } | |
735f2c6e | 4943 | |
6b9be523 | 4944 | on_error: |
f686506d TA |
4945 | if (size < sizeof(*opts)) |
4946 | free(valid_opts); | |
4947 | ||
aef3d51e TA |
4948 | return ret; |
4949 | } | |
735f2c6e | 4950 | |
aef3d51e | 4951 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4952 | |
aef3d51e TA |
4953 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4954 | { | |
ebb088e1 AR |
4955 | struct migrate_opts opts; |
4956 | ||
4957 | memset(&opts, 0, sizeof(opts)); | |
4958 | ||
4959 | opts.directory = directory; | |
4960 | opts.stop = stop; | |
4961 | opts.verbose = verbose; | |
735f2c6e | 4962 | |
aef3d51e | 4963 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4964 | } |
4965 | ||
858377e4 SH |
4966 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4967 | ||
4968 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4969 | { |
ebb088e1 AR |
4970 | struct migrate_opts opts; |
4971 | ||
4972 | memset(&opts, 0, sizeof(opts)); | |
4973 | ||
4974 | opts.directory = directory; | |
4975 | opts.verbose = verbose; | |
c9d8f2ee | 4976 | |
aef3d51e | 4977 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4978 | } |
4979 | ||
858377e4 SH |
4980 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4981 | ||
1f5a90f9 CB |
4982 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4983 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4984 | { | |
4985 | char *dirdup, *destdirname; | |
4986 | int ret; | |
4987 | ||
4988 | dirdup = strdup(dest); | |
4989 | if (!dirdup) { | |
4990 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4991 | return -1; | |
4992 | } | |
4993 | destdirname = dirname(dirdup); | |
4994 | ||
4995 | ret = mkdir_p(destdirname, 0755); | |
4996 | if (ret < 0) { | |
4997 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4998 | free(dirdup); | |
4999 | return ret; | |
5000 | } | |
5001 | free(dirdup); | |
5002 | ||
5003 | (void)remove(dest); | |
5004 | ||
5005 | if (S_ISDIR(st_mode)) | |
5006 | ret = mkdir(dest, 0000); | |
5007 | else | |
5008 | ret = mknod(dest, S_IFREG | 0000, 0); | |
71521317 SG |
5009 | |
5010 | if (ret == 0) | |
5011 | TRACE("Created mount target \"%s\"", dest); | |
d8bc14a7 | 5012 | else if (ret < 0 && errno != EEXIST) { |
1f5a90f9 CB |
5013 | SYSERROR("Failed to create mount target \"%s\"", dest); |
5014 | return -1; | |
5015 | } | |
5016 | ||
5017 | return 0; | |
5018 | } | |
5019 | ||
3340f441 CB |
5020 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
5021 | const char *target, const char *filesystemtype, | |
5022 | unsigned long mountflags, const void *data, | |
5023 | struct lxc_mount *mnt) | |
5024 | { | |
29df56cd | 5025 | char *suff, *sret; |
8a22c168 | 5026 | char template[PATH_MAX], path[PATH_MAX]; |
29df56cd | 5027 | pid_t pid, init_pid; |
c6885c3f | 5028 | struct stat sb; |
ecce75a6 | 5029 | bool is_dir; |
29df56cd LT |
5030 | int ret = -1, fd = -EBADF; |
5031 | ||
5032 | if (!c || !c->lxc_conf) { | |
5033 | ERROR("Container or configuration is NULL"); | |
5034 | return -EINVAL; | |
5035 | } | |
5036 | ||
7a41e857 | 5037 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
5038 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
5039 | return -EINVAL; | |
5040 | } | |
29df56cd | 5041 | |
60534030 LT |
5042 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
5043 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
5044 | SYSERROR("Error writing shmounts tempdir name"); |
5045 | goto out; | |
5046 | } | |
5047 | ||
c6885c3f LT |
5048 | /* Create a temporary file / dir under the shared mountpoint */ |
5049 | if (!source || strcmp(source, "") == 0) { | |
5050 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
5051 | sb.st_mode = S_IFDIR; | |
5052 | } else { | |
5053 | ret = stat(source, &sb); | |
5054 | if (ret < 0) { | |
5055 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5056 | goto out; | |
5057 | } | |
5058 | } | |
5059 | ||
ecce75a6 CB |
5060 | is_dir = (S_ISDIR(sb.st_mode) != 0); |
5061 | if (is_dir) { | |
c6885c3f LT |
5062 | sret = mkdtemp(template); |
5063 | if (!sret) { | |
5064 | SYSERROR("Could not create shmounts temporary dir"); | |
5065 | goto out; | |
5066 | } | |
c6885c3f LT |
5067 | } else { |
5068 | fd = lxc_make_tmpfile(template, false); | |
5069 | if (fd < 0) { | |
5070 | SYSERROR("Could not create shmounts temporary file"); | |
5071 | goto out; | |
5072 | } | |
29df56cd LT |
5073 | } |
5074 | ||
5075 | /* Do the fork */ | |
5076 | pid = fork(); | |
5077 | if (pid < 0) { | |
5078 | SYSERROR("Could not fork"); | |
5079 | goto out; | |
5080 | } | |
5081 | ||
5082 | if (pid == 0) { | |
5083 | /* Do the mount */ | |
5084 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5085 | if (ret < 0) { | |
c6885c3f | 5086 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5087 | _exit(EXIT_FAILURE); |
5088 | } | |
3340f441 | 5089 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5090 | |
5091 | init_pid = do_lxcapi_init_pid(c); | |
5092 | if (init_pid < 0) { | |
5093 | ERROR("Failed to obtain container's init pid"); | |
5094 | _exit(EXIT_FAILURE); | |
5095 | } | |
5096 | ||
5097 | /* Enter the container namespaces */ | |
5098 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
4e5a9657 | 5099 | if (!switch_to_ns(init_pid, "user")) { |
29df56cd LT |
5100 | ERROR("Failed to enter user namespace"); |
5101 | _exit(EXIT_FAILURE); | |
5102 | } | |
4e5a9657 CB |
5103 | |
5104 | if (!lxc_switch_uid_gid(0, 0)) | |
5105 | _exit(EXIT_FAILURE); | |
29df56cd | 5106 | } |
3340f441 | 5107 | |
29df56cd LT |
5108 | if (!switch_to_ns(init_pid, "mnt")) { |
5109 | ERROR("Failed to enter mount namespace"); | |
5110 | _exit(EXIT_FAILURE); | |
5111 | } | |
5112 | ||
71521317 SG |
5113 | ret = create_mount_target(target, sb.st_mode); |
5114 | if (ret < 0) | |
5115 | _exit(EXIT_FAILURE); | |
c6885c3f | 5116 | |
29df56cd LT |
5117 | suff = strrchr(template, '/'); |
5118 | if (!suff) | |
5119 | _exit(EXIT_FAILURE); | |
5120 | ||
60534030 LT |
5121 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5122 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd LT |
5123 | SYSERROR("Error writing container mountpoint name"); |
5124 | _exit(EXIT_FAILURE); | |
5125 | } | |
5126 | ||
3340f441 | 5127 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5128 | if (ret < 0) { |
5129 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
5130 | _exit(EXIT_FAILURE); | |
5131 | } | |
3340f441 | 5132 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5133 | |
5134 | _exit(EXIT_SUCCESS); | |
5135 | } | |
5136 | ||
5137 | ret = wait_for_pid(pid); | |
5138 | if (ret < 0) { | |
5139 | SYSERROR("Wait for the child with pid %ld failed", (long) pid); | |
5140 | goto out; | |
5141 | } | |
5142 | ||
5143 | ret = 0; | |
5144 | ||
5145 | (void)umount2(template, MNT_DETACH); | |
ecce75a6 CB |
5146 | if (is_dir) |
5147 | (void)rmdir(template); | |
5148 | else | |
5149 | (void)unlink(template); | |
29df56cd LT |
5150 | |
5151 | out: | |
5152 | if (fd >= 0) | |
5153 | close(fd); | |
3340f441 | 5154 | |
29df56cd LT |
5155 | return ret; |
5156 | } | |
5157 | ||
5158 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5159 | unsigned long, const void *, struct lxc_mount *) |
5160 | ||
5161 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5162 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5163 | { |
5164 | pid_t pid, init_pid; | |
5165 | int ret = -1; | |
5166 | ||
5167 | if (!c || !c->lxc_conf) { | |
5168 | ERROR("Container or configuration is NULL"); | |
5169 | return -EINVAL; | |
5170 | } | |
5171 | ||
5172 | /* Do the fork */ | |
5173 | pid = fork(); | |
5174 | if (pid < 0) { | |
5175 | SYSERROR("Could not fork"); | |
5176 | return -1; | |
5177 | } | |
5178 | ||
5179 | if (pid == 0) { | |
5180 | init_pid = do_lxcapi_init_pid(c); | |
5181 | if (init_pid < 0) { | |
5182 | ERROR("Failed to obtain container's init pid"); | |
5183 | _exit(EXIT_FAILURE); | |
5184 | } | |
5185 | ||
5186 | /* Enter the container namespaces */ | |
5187 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5188 | if (!switch_to_ns(init_pid, "user")) { | |
5189 | ERROR("Failed to enter user namespace"); | |
5190 | _exit(EXIT_FAILURE); | |
5191 | } | |
5192 | } | |
5193 | ||
5194 | if (!switch_to_ns(init_pid, "mnt")) { | |
5195 | ERROR("Failed to enter mount namespace"); | |
5196 | _exit(EXIT_FAILURE); | |
5197 | } | |
5198 | ||
5199 | /* Do the unmount */ | |
7a41e857 | 5200 | ret = umount2(target, flags); |
d83da817 LT |
5201 | if (ret < 0) { |
5202 | SYSERROR("Failed to umount \"%s\"", target); | |
5203 | _exit(EXIT_FAILURE); | |
5204 | } | |
5205 | ||
5206 | _exit(EXIT_SUCCESS); | |
5207 | } | |
5208 | ||
5209 | ret = wait_for_pid(pid); | |
5210 | if (ret < 0) { | |
5211 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5212 | return -ret; | |
5213 | } | |
5214 | ||
5215 | return 0; | |
5216 | } | |
5217 | ||
5218 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5219 | |
a0e93eeb CS |
5220 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5221 | { | |
5222 | va_list ap; | |
5223 | const char **argv; | |
5224 | int ret; | |
5225 | ||
5226 | if (!c) | |
5227 | return -1; | |
5228 | ||
858377e4 SH |
5229 | current_config = c->lxc_conf; |
5230 | ||
a0e93eeb CS |
5231 | va_start(ap, arg); |
5232 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5233 | va_end(ap); | |
5234 | ||
5235 | if (!argv) { | |
5236 | ERROR("Memory allocation error."); | |
858377e4 SH |
5237 | ret = -1; |
5238 | goto out; | |
a0e93eeb CS |
5239 | } |
5240 | argv[0] = arg; | |
5241 | ||
858377e4 | 5242 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5243 | free((void*)argv); |
a73846d8 | 5244 | |
858377e4 SH |
5245 | out: |
5246 | current_config = NULL; | |
a0e93eeb CS |
5247 | return ret; |
5248 | } | |
5249 | ||
cdb2a47f CB |
5250 | static int do_lxcapi_seccomp_notify(struct lxc_container *c, unsigned int cmd, int fd) |
5251 | { | |
cdb2a47f CB |
5252 | if (!c || !c->lxc_conf) |
5253 | return minus_one_set_errno(-EINVAL); | |
5254 | ||
5255 | switch (cmd) { | |
5256 | case LXC_SECCOMP_NOTIFY_GET_FD: | |
5257 | if (fd) | |
5258 | return minus_one_set_errno(EINVAL); | |
5259 | ||
c3e3c21a | 5260 | return lxc_seccomp_get_notify_fd(&c->lxc_conf->seccomp); |
cdb2a47f CB |
5261 | } |
5262 | ||
5263 | return minus_one_set_errno(EINVAL); | |
cdb2a47f CB |
5264 | } |
5265 | ||
5266 | WRAP_API_2(int, lxcapi_seccomp_notify, unsigned int, int) | |
5267 | ||
afeecbba | 5268 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5269 | { |
5270 | struct lxc_container *c; | |
cbb9c7c7 | 5271 | size_t len; |
9fbe07f6 | 5272 | int rc; |
72d0e1cb | 5273 | |
18aa217b SH |
5274 | if (!name) |
5275 | return NULL; | |
5276 | ||
72d0e1cb SG |
5277 | c = malloc(sizeof(*c)); |
5278 | if (!c) { | |
e9e29a33 | 5279 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5280 | return NULL; |
5281 | } | |
5282 | memset(c, 0, sizeof(*c)); | |
5283 | ||
afeecbba SH |
5284 | if (configpath) |
5285 | c->config_path = strdup(configpath); | |
5286 | else | |
593e8478 | 5287 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5288 | if (!c->config_path) { |
e9e29a33 | 5289 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5290 | goto err; |
5291 | } | |
5292 | ||
f5dd1d53 | 5293 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5294 | |
5295 | len = strlen(name); | |
5296 | c->name = malloc(len + 1); | |
72d0e1cb | 5297 | if (!c->name) { |
e9e29a33 | 5298 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5299 | goto err; |
5300 | } | |
cbb9c7c7 | 5301 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5302 | |
5303 | c->numthreads = 1; | |
e9e29a33 CB |
5304 | c->slock = lxc_newlock(c->config_path, name); |
5305 | if (!c->slock) { | |
5306 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5307 | goto err; |
5308 | } | |
5309 | ||
e9e29a33 CB |
5310 | c->privlock = lxc_newlock(NULL, NULL); |
5311 | if (!c->privlock) { | |
5312 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5313 | goto err; |
5314 | } | |
5315 | ||
afeecbba | 5316 | if (!set_config_filename(c)) { |
e9e29a33 | 5317 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5318 | goto err; |
5319 | } | |
72d0e1cb | 5320 | |
e9e29a33 CB |
5321 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5322 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5323 | goto err; |
e9e29a33 | 5324 | } |
72d0e1cb | 5325 | |
9fbe07f6 RK |
5326 | rc = ongoing_create(c); |
5327 | switch (rc) { | |
5328 | case LXC_CREATE_INCOMPLETE: | |
5329 | SYSERROR("Failed to complete container creation for %s", c->name); | |
17a367d8 | 5330 | container_destroy(c, NULL); |
4df7f012 | 5331 | lxcapi_clear_config(c); |
9fbe07f6 RK |
5332 | break; |
5333 | case LXC_CREATE_ONGOING: | |
5334 | /* container creation going on */ | |
5335 | break; | |
5336 | case LXC_CREATE_FAILED: | |
5337 | /* container creation failed */ | |
5338 | if (errno != EACCES && errno != EPERM) { | |
5339 | /* insufficient privileges */ | |
5340 | SYSERROR("Failed checking for incomplete container %s creation", c->name); | |
5341 | goto err; | |
5342 | } | |
5343 | break; | |
3e625e2d | 5344 | } |
a73846d8 | 5345 | |
a2739df5 | 5346 | c->daemonize = true; |
72cf75fa | 5347 | c->pidfile = NULL; |
3e625e2d | 5348 | |
1a0e70ac | 5349 | /* Assign the member functions. */ |
72d0e1cb SG |
5350 | c->is_defined = lxcapi_is_defined; |
5351 | c->state = lxcapi_state; | |
5352 | c->is_running = lxcapi_is_running; | |
5353 | c->freeze = lxcapi_freeze; | |
5354 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5355 | c->console = lxcapi_console; |
b5159817 | 5356 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5357 | c->init_pid = lxcapi_init_pid; |
5358 | c->load_config = lxcapi_load_config; | |
5359 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5360 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5361 | c->start = lxcapi_start; |
5362 | c->startl = lxcapi_startl; | |
5363 | c->stop = lxcapi_stop; | |
5364 | c->config_file_name = lxcapi_config_file_name; | |
5365 | c->wait = lxcapi_wait; | |
5366 | c->set_config_item = lxcapi_set_config_item; | |
5367 | c->destroy = lxcapi_destroy; | |
18aa217b | 5368 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5369 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5370 | c->save_config = lxcapi_save_config; |
5371 | c->get_keys = lxcapi_get_keys; | |
5372 | c->create = lxcapi_create; | |
5373 | c->createl = lxcapi_createl; | |
5374 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5375 | c->reboot = lxcapi_reboot; |
d39b10eb | 5376 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5377 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5378 | c->clear_config_item = lxcapi_clear_config_item; |
5379 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5380 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5381 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5382 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5383 | c->get_config_path = lxcapi_get_config_path; |
5384 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5385 | c->clone = lxcapi_clone; |
799f29ab | 5386 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5387 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5388 | c->attach = lxcapi_attach; |
5389 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5390 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5391 | c->snapshot = lxcapi_snapshot; |
5392 | c->snapshot_list = lxcapi_snapshot_list; | |
5393 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5394 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5395 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5396 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5397 | c->add_device_node = lxcapi_add_device_node; |
5398 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5399 | c->attach_interface = lxcapi_attach_interface; |
5400 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5401 | c->checkpoint = lxcapi_checkpoint; |
5402 | c->restore = lxcapi_restore; | |
aef3d51e | 5403 | c->migrate = lxcapi_migrate; |
191d43cc | 5404 | c->console_log = lxcapi_console_log; |
29df56cd | 5405 | c->mount = lxcapi_mount; |
d83da817 | 5406 | c->umount = lxcapi_umount; |
cdb2a47f | 5407 | c->seccomp_notify = lxcapi_seccomp_notify; |
72d0e1cb | 5408 | |
72d0e1cb SG |
5409 | return c; |
5410 | ||
5411 | err: | |
5412 | lxc_container_free(c); | |
5413 | return NULL; | |
5414 | } | |
5415 | ||
4a7c7daa | 5416 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5417 | { |
5418 | int i; | |
5419 | ||
5420 | if (states) | |
5421 | for (i=0; i<MAX_STATE; i++) | |
5422 | states[i] = lxc_state2str(i); | |
a73846d8 | 5423 | |
72d0e1cb SG |
5424 | return MAX_STATE; |
5425 | } | |
a41f104b | 5426 | |
a41f104b SH |
5427 | /* |
5428 | * These next two could probably be done smarter with reusing a common function | |
5429 | * with different iterators and tests... | |
5430 | */ | |
5431 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5432 | { | |
5433 | DIR *dir; | |
5434 | int i, cfound = 0, nfound = 0; | |
74f96976 | 5435 | struct dirent *direntp; |
a41f104b SH |
5436 | struct lxc_container *c; |
5437 | ||
5438 | if (!lxcpath) | |
593e8478 | 5439 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5440 | |
a41f104b | 5441 | dir = opendir(lxcpath); |
a41f104b SH |
5442 | if (!dir) { |
5443 | SYSERROR("opendir on lxcpath"); | |
5444 | return -1; | |
5445 | } | |
5446 | ||
5447 | if (cret) | |
5448 | *cret = NULL; | |
a73846d8 | 5449 | |
a41f104b SH |
5450 | if (names) |
5451 | *names = NULL; | |
5452 | ||
74f96976 | 5453 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5454 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5455 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5456 | continue; |
5457 | ||
5458 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5459 | continue; | |
5460 | ||
a73846d8 | 5461 | if (names) |
9c88ff1f | 5462 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5463 | goto free_bad; |
a73846d8 | 5464 | |
a41f104b SH |
5465 | cfound++; |
5466 | ||
5467 | if (!cret) { | |
5468 | nfound++; | |
5469 | continue; | |
5470 | } | |
5471 | ||
5472 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5473 | if (!c) { | |
5474 | INFO("Container %s:%s has a config but could not be loaded", | |
5475 | lxcpath, direntp->d_name); | |
a73846d8 | 5476 | |
a41f104b | 5477 | if (names) |
9c88ff1f ÇO |
5478 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5479 | goto free_bad; | |
a73846d8 | 5480 | |
a41f104b SH |
5481 | continue; |
5482 | } | |
a73846d8 | 5483 | |
858377e4 | 5484 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5485 | INFO("Container %s:%s has a config but is not defined", |
5486 | lxcpath, direntp->d_name); | |
a73846d8 | 5487 | |
a41f104b | 5488 | if (names) |
9c88ff1f ÇO |
5489 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5490 | goto free_bad; | |
a73846d8 | 5491 | |
a41f104b SH |
5492 | lxc_container_put(c); |
5493 | continue; | |
5494 | } | |
5495 | ||
2871830a | 5496 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5497 | lxc_container_put(c); |
5498 | goto free_bad; | |
5499 | } | |
a73846d8 | 5500 | |
a41f104b SH |
5501 | nfound++; |
5502 | } | |
5503 | ||
a41f104b | 5504 | closedir(dir); |
a41f104b SH |
5505 | return nfound; |
5506 | ||
5507 | free_bad: | |
5508 | if (names && *names) { | |
5509 | for (i=0; i<cfound; i++) | |
5510 | free((*names)[i]); | |
5511 | free(*names); | |
5512 | } | |
a73846d8 | 5513 | |
a41f104b SH |
5514 | if (cret && *cret) { |
5515 | for (i=0; i<nfound; i++) | |
5516 | lxc_container_put((*cret)[i]); | |
5517 | free(*cret); | |
5518 | } | |
a73846d8 | 5519 | |
a41f104b | 5520 | closedir(dir); |
a41f104b SH |
5521 | return -1; |
5522 | } | |
5523 | ||
148a9d27 DE |
5524 | int list_active_containers(const char *lxcpath, char ***nret, |
5525 | struct lxc_container ***cret) | |
a41f104b | 5526 | { |
148a9d27 | 5527 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5528 | int lxcpath_len; |
5529 | char *line = NULL; | |
148a9d27 | 5530 | char **ct_name = NULL; |
a41f104b | 5531 | size_t len = 0; |
97bc2422 | 5532 | struct lxc_container *c = NULL; |
88556fd7 | 5533 | bool is_hashed; |
a41f104b SH |
5534 | |
5535 | if (!lxcpath) | |
593e8478 | 5536 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5537 | lxcpath_len = strlen(lxcpath); |
5538 | ||
5539 | if (cret) | |
5540 | *cret = NULL; | |
a73846d8 | 5541 | |
148a9d27 DE |
5542 | if (nret) |
5543 | *nret = NULL; | |
a41f104b | 5544 | |
a41f104b | 5545 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
5546 | if (!f) |
5547 | return -1; | |
5548 | ||
5549 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5550 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5551 | if (!p) |
5552 | continue; | |
5553 | p++; | |
a73846d8 | 5554 | |
a41f104b SH |
5555 | if (*p != 0x40) |
5556 | continue; | |
5557 | p++; | |
88556fd7 ÇO |
5558 | |
5559 | is_hashed = false; | |
a73846d8 | 5560 | |
88556fd7 ÇO |
5561 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5562 | p += lxcpath_len; | |
5563 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5564 | p += 4; | |
5565 | is_hashed = true; | |
5566 | } else { | |
a41f104b | 5567 | continue; |
88556fd7 ÇO |
5568 | } |
5569 | ||
a41f104b SH |
5570 | while (*p == '/') |
5571 | p++; | |
5572 | ||
1a0e70ac | 5573 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5574 | p2 = strchr(p, '/'); |
a41f104b SH |
5575 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5576 | continue; | |
5577 | *p2 = '\0'; | |
5578 | ||
88556fd7 | 5579 | if (is_hashed) { |
899a9f55 CB |
5580 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5581 | if (!recvpath) | |
5582 | continue; | |
a73846d8 | 5583 | |
e07eafa8 L |
5584 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5585 | free(recvpath); | |
88556fd7 | 5586 | continue; |
e07eafa8 L |
5587 | } |
5588 | free(recvpath); | |
a73846d8 | 5589 | |
88556fd7 | 5590 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5591 | if (!p) |
5592 | continue; | |
88556fd7 ÇO |
5593 | } |
5594 | ||
e07eafa8 L |
5595 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5596 | if (is_hashed) | |
5597 | free(p); | |
9c88ff1f | 5598 | continue; |
e07eafa8 | 5599 | } |
9c88ff1f | 5600 | |
e07eafa8 L |
5601 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5602 | if (is_hashed) | |
5603 | free(p); | |
148a9d27 | 5604 | goto free_cret_list; |
e07eafa8 | 5605 | } |
9c88ff1f | 5606 | |
148a9d27 | 5607 | ct_name_cnt++; |
a41f104b | 5608 | |
e07eafa8 L |
5609 | if (!cret) { |
5610 | if (is_hashed) | |
5611 | free(p); | |
a41f104b | 5612 | continue; |
e07eafa8 | 5613 | } |
a41f104b SH |
5614 | |
5615 | c = lxc_container_new(p, lxcpath); | |
5616 | if (!c) { | |
5617 | INFO("Container %s:%s is running but could not be loaded", | |
5618 | lxcpath, p); | |
a73846d8 | 5619 | |
148a9d27 | 5620 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5621 | if (is_hashed) |
5622 | free(p); | |
a73846d8 | 5623 | |
a41f104b SH |
5624 | continue; |
5625 | } | |
5626 | ||
e07eafa8 L |
5627 | if (is_hashed) |
5628 | free(p); | |
5629 | ||
a41f104b SH |
5630 | /* |
5631 | * If this is an anonymous container, then is_defined *can* | |
5632 | * return false. So we don't do that check. Count on the | |
5633 | * fact that the command socket exists. | |
5634 | */ | |
5635 | ||
148a9d27 | 5636 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5637 | lxc_container_put(c); |
148a9d27 | 5638 | goto free_cret_list; |
a41f104b | 5639 | } |
a73846d8 | 5640 | |
148a9d27 | 5641 | cret_cnt++; |
a41f104b SH |
5642 | } |
5643 | ||
97bc2422 CB |
5644 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5645 | if (c) | |
5646 | lxc_container_put(c); | |
5647 | goto free_cret_list; | |
5648 | } | |
5649 | ||
148a9d27 DE |
5650 | ret = ct_name_cnt; |
5651 | if (nret) | |
5652 | *nret = ct_name; | |
5653 | else | |
5654 | goto free_ct_name; | |
a73846d8 | 5655 | |
148a9d27 | 5656 | goto out; |
a41f104b | 5657 | |
148a9d27 | 5658 | free_cret_list: |
a41f104b | 5659 | if (cret && *cret) { |
148a9d27 | 5660 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5661 | lxc_container_put((*cret)[i]); |
5662 | free(*cret); | |
5663 | } | |
148a9d27 DE |
5664 | |
5665 | free_ct_name: | |
5666 | if (ct_name) { | |
5667 | for (i = 0; i < ct_name_cnt; i++) | |
5668 | free(ct_name[i]); | |
5669 | free(ct_name); | |
5670 | } | |
5671 | ||
5672 | out: | |
f10fad2f | 5673 | free(line); |
a41f104b | 5674 | fclose(f); |
148a9d27 | 5675 | return ret; |
a41f104b | 5676 | } |
2871830a DE |
5677 | |
5678 | int list_all_containers(const char *lxcpath, char ***nret, | |
5679 | struct lxc_container ***cret) | |
5680 | { | |
5681 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5682 | char **active_name; | |
5683 | char **ct_name; | |
5684 | struct lxc_container **ct_list = NULL; | |
5685 | ||
5686 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5687 | if (ct_cnt < 0) | |
5688 | return ct_cnt; | |
5689 | ||
5690 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5691 | if (active_cnt < 0) { | |
5692 | ret = active_cnt; | |
5693 | goto free_ct_name; | |
5694 | } | |
5695 | ||
5696 | for (i = 0; i < active_cnt; i++) { | |
5697 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5698 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5699 | ret = -1; | |
5700 | goto free_active_name; | |
5701 | } | |
a73846d8 | 5702 | |
2871830a DE |
5703 | ct_cnt++; |
5704 | } | |
a73846d8 | 5705 | |
2871830a DE |
5706 | free(active_name[i]); |
5707 | active_name[i] = NULL; | |
5708 | } | |
a73846d8 | 5709 | |
2871830a DE |
5710 | free(active_name); |
5711 | active_name = NULL; | |
5712 | active_cnt = 0; | |
5713 | ||
5714 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5715 | struct lxc_container *c; | |
5716 | ||
5717 | c = lxc_container_new(ct_name[i], lxcpath); | |
5718 | if (!c) { | |
5719 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5720 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5721 | continue; | |
5722 | } | |
5723 | ||
5724 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5725 | lxc_container_put(c); | |
5726 | ret = -1; | |
5727 | goto free_ct_list; | |
5728 | } | |
a73846d8 | 5729 | |
2871830a DE |
5730 | ct_list_cnt++; |
5731 | } | |
5732 | ||
5733 | if (cret) | |
5734 | *cret = ct_list; | |
5735 | ||
a73846d8 | 5736 | if (nret) { |
2871830a | 5737 | *nret = ct_name; |
a73846d8 | 5738 | } else { |
2871830a DE |
5739 | ret = ct_cnt; |
5740 | goto free_ct_name; | |
5741 | } | |
a73846d8 | 5742 | |
2871830a DE |
5743 | return ct_cnt; |
5744 | ||
5745 | free_ct_list: | |
5746 | for (i = 0; i < ct_list_cnt; i++) { | |
5747 | lxc_container_put(ct_list[i]); | |
5748 | } | |
f10fad2f | 5749 | free(ct_list); |
2871830a DE |
5750 | |
5751 | free_active_name: | |
5752 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5753 | free(active_name[i]); |
2871830a | 5754 | } |
f10fad2f | 5755 | free(active_name); |
2871830a DE |
5756 | |
5757 | free_ct_name: | |
5758 | for (i = 0; i < ct_cnt; i++) { | |
5759 | free(ct_name[i]); | |
5760 | } | |
5761 | free(ct_name); | |
5762 | return ret; | |
5763 | } | |
12461428 CB |
5764 | |
5765 | bool lxc_config_item_is_supported(const char *key) | |
5766 | { | |
300df83e | 5767 | return !!lxc_get_config(key); |
12461428 | 5768 | } |
aafa5f96 CB |
5769 | |
5770 | bool lxc_has_api_extension(const char *extension) | |
5771 | { | |
5772 | /* The NULL API extension is always present. :) */ | |
5773 | if (!extension) | |
5774 | return true; | |
5775 | ||
5776 | for (size_t i = 0; i < nr_api_extensions; i++) | |
5777 | if (strcmp(api_extensions[i], extension) == 0) | |
5778 | return true; | |
5779 | ||
5780 | return false; | |
5781 | } |