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Commit | Line | Data |
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cc73685d | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
72d0e1cb | 2 | |
1160ce89 CB |
3 | #include "config.h" |
4 | ||
0e14584d | 5 | #include <arpa/inet.h> |
38683db4 | 6 | #include <dirent.h> |
9be53773 | 7 | #include <errno.h> |
93dc5327 | 8 | #include <fcntl.h> |
38683db4 | 9 | #include <grp.h> |
f2363e38 | 10 | #include <libgen.h> |
38683db4 CB |
11 | #include <pthread.h> |
12 | #include <sched.h> | |
13 | #include <stdarg.h> | |
d659597e | 14 | #include <stdint.h> |
9fc7f8c0 | 15 | #include <stdio.h> |
29df56cd | 16 | #include <stdlib.h> |
56474555 | 17 | #include <sys/file.h> |
38683db4 CB |
18 | #include <sys/mman.h> |
19 | #include <sys/mount.h> | |
29df56cd | 20 | #include <sys/stat.h> |
5f7eba0b | 21 | #include <sys/syscall.h> |
0e14584d | 22 | #include <sys/sysmacros.h> |
38683db4 CB |
23 | #include <sys/types.h> |
24 | #include <sys/wait.h> | |
0e14584d | 25 | #include <unistd.h> |
f2363e38 | 26 | |
12ae2a33 CB |
27 | #include "lxc.h" |
28 | ||
58db1a61 | 29 | #include "netns_ifaddrs.h" |
5e5576a4 | 30 | #include "af_unix.h" |
aafa5f96 | 31 | #include "api_extensions.h" |
38683db4 | 32 | #include "attach.h" |
38683db4 | 33 | #include "cgroup.h" |
1b5d4bd8 | 34 | #include "macro.h" |
38683db4 | 35 | #include "commands.h" |
92e35018 | 36 | #include "commands_utils.h" |
0e14584d | 37 | #include "conf.h" |
72d0e1cb | 38 | #include "confile.h" |
4222a9f4 | 39 | #include "confile_utils.h" |
e29fe1dd | 40 | #include "criu.h" |
238b3e5e | 41 | #include "error.h" |
a6f151a7 | 42 | #include "initutils.h" |
72d0e1cb | 43 | #include "log.h" |
38683db4 | 44 | #include "lxc.h" |
38683db4 | 45 | #include "lxclock.h" |
f5849fd7 | 46 | #include "memory_utils.h" |
f2363e38 ÇO |
47 | #include "monitor.h" |
48 | #include "namespace.h" | |
fed29fad | 49 | #include "network.h" |
9994d140 | 50 | #include "parse.h" |
f40988c7 | 51 | #include "process_utils.h" |
aa460476 | 52 | #include "start.h" |
38683db4 | 53 | #include "state.h" |
28d832c4 CB |
54 | #include "storage.h" |
55 | #include "storage/btrfs.h" | |
56 | #include "storage/overlay.h" | |
0e14584d | 57 | #include "storage_utils.h" |
28d832c4 | 58 | #include "sync.h" |
e8f764b6 | 59 | #include "syscall_wrappers.h" |
0ed9b1bc | 60 | #include "terminal.h" |
38683db4 CB |
61 | #include "utils.h" |
62 | #include "version.h" | |
4ba0d9af | 63 | |
fa2bb6ba SH |
64 | #if HAVE_OPENSSL |
65 | #include <openssl/evp.h> | |
66 | #endif | |
67 | ||
af6824fc ST |
68 | /* major()/minor() */ |
69 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 70 | #include <sys/mkdev.h> |
af6824fc | 71 | #endif |
af6824fc | 72 | |
684f79a5 SG |
73 | #if IS_BIONIC |
74 | #include <../include/lxcmntent.h> | |
75 | #else | |
76 | #include <mntent.h> | |
77 | #endif | |
78 | ||
9de31d5a CB |
79 | #ifndef HAVE_STRLCPY |
80 | #include "include/strlcpy.h" | |
81 | #endif | |
82 | ||
ac2cecc4 | 83 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 84 | |
858377e4 SH |
85 | static bool do_lxcapi_destroy(struct lxc_container *c); |
86 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
87 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
88 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
89 | static bool container_destroy(struct lxc_container *c, |
90 | struct lxc_storage *storage); | |
858377e4 SH |
91 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
92 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
93 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
94 | ||
a41f104b SH |
95 | static bool config_file_exists(const char *lxcpath, const char *cname) |
96 | { | |
7a99b5a0 | 97 | __do_free char *fname = NULL; |
ef1ab8f1 CB |
98 | int ret; |
99 | size_t len; | |
a41f104b | 100 | |
ef1ab8f1 | 101 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
1b5d4bd8 | 102 | len = strlen(lxcpath) + 1 + strlen(cname) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
f5849fd7 | 103 | fname = must_realloc(NULL, len); |
94aeacb7 CB |
104 | ret = strnprintf(fname, len, "%s/%s/%s", lxcpath, cname, LXC_CONFIG_FNAME); |
105 | if (ret < 0) | |
a41f104b SH |
106 | return false; |
107 | ||
108 | return file_exists(fname); | |
109 | } | |
110 | ||
9fbe07f6 RK |
111 | /* |
112 | * A few functions to help detect when a container creation failed. If a | |
444249ea CB |
113 | * container creation was killed partway through, then trying to actually start |
114 | * that container could harm the host. We detect this by creating a 'partial' | |
115 | * file under the container directory, and keeping an advisory lock. When | |
116 | * container creation completes, we remove that file. When we load or try to | |
117 | * start a container, if we find that file, without a flock, we remove the | |
118 | * container. | |
3e625e2d | 119 | */ |
9fbe07f6 RK |
120 | enum { |
121 | LXC_CREATE_FAILED = -1, | |
122 | LXC_CREATE_SUCCESS = 0, | |
123 | LXC_CREATE_ONGOING = 1, | |
124 | LXC_CREATE_INCOMPLETE = 2, | |
125 | }; | |
126 | ||
74a3920a | 127 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 128 | { |
f62cf1d4 | 129 | __do_close int fd = -EBADF; |
7a99b5a0 | 130 | __do_free char *path = NULL; |
56474555 | 131 | struct flock lk = {0}; |
9fbe07f6 RK |
132 | int ret; |
133 | size_t len; | |
93dc5327 | 134 | |
1b5d4bd8 | 135 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 136 | path = must_realloc(NULL, len); |
94aeacb7 CB |
137 | ret = strnprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
138 | if (ret < 0) | |
9fbe07f6 | 139 | return LXC_CREATE_FAILED; |
3e625e2d | 140 | |
d1bc8d48 CB |
141 | fd = open(path, O_RDWR | O_CLOEXEC); |
142 | if (fd < 0) { | |
143 | if (errno != ENOENT) | |
9fbe07f6 | 144 | return LXC_CREATE_FAILED; |
444249ea | 145 | |
9fbe07f6 | 146 | return LXC_CREATE_SUCCESS; |
d1bc8d48 | 147 | } |
444249ea | 148 | |
93dc5327 SH |
149 | lk.l_type = F_WRLCK; |
150 | lk.l_whence = SEEK_SET; | |
9fbe07f6 RK |
151 | /* |
152 | * F_OFD_GETLK requires that l_pid be set to 0 otherwise the kernel | |
ec74f3f8 CB |
153 | * will EINVAL us. |
154 | */ | |
155 | lk.l_pid = 0; | |
444249ea | 156 | |
56474555 | 157 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
d1bc8d48 | 158 | if (ret < 0 && errno == EINVAL) { |
56474555 | 159 | ret = flock(fd, LOCK_EX | LOCK_NB); |
d1bc8d48 CB |
160 | if (ret < 0 && errno == EWOULDBLOCK) |
161 | ret = 0; | |
162 | } | |
a73846d8 | 163 | |
ec74f3f8 CB |
164 | /* F_OFD_GETLK will not send us back a pid so don't check it. */ |
165 | if (ret == 0) | |
166 | /* Create is still ongoing. */ | |
9fbe07f6 | 167 | return LXC_CREATE_ONGOING; |
444249ea CB |
168 | |
169 | /* Create completed but partial is still there. */ | |
9fbe07f6 | 170 | return LXC_CREATE_INCOMPLETE; |
3e625e2d SH |
171 | } |
172 | ||
74a3920a | 173 | static int create_partial(struct lxc_container *c) |
3e625e2d | 174 | { |
7a99b5a0 | 175 | __do_free char *path = NULL; |
3e625e2d | 176 | int fd, ret; |
f5cd0252 | 177 | size_t len; |
56474555 | 178 | struct flock lk = {0}; |
93dc5327 | 179 | |
f5cd0252 | 180 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
1b5d4bd8 | 181 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 182 | path = must_realloc(NULL, len); |
94aeacb7 CB |
183 | ret = strnprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
184 | if (ret < 0) | |
3e625e2d | 185 | return -1; |
f5cd0252 | 186 | |
d1bc8d48 | 187 | fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0000); |
f5cd0252 | 188 | if (fd < 0) |
3e625e2d | 189 | return -1; |
f5cd0252 | 190 | |
93dc5327 SH |
191 | lk.l_type = F_WRLCK; |
192 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 193 | |
56474555 | 194 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 195 | if (ret < 0) { |
56474555 CB |
196 | if (errno == EINVAL) { |
197 | ret = flock(fd, LOCK_EX); | |
198 | if (ret == 0) | |
199 | return fd; | |
200 | } | |
201 | ||
f5cd0252 | 202 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 203 | close(fd); |
3e625e2d SH |
204 | return -1; |
205 | } | |
3e625e2d SH |
206 | |
207 | return fd; | |
208 | } | |
209 | ||
74a3920a | 210 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 211 | { |
7a99b5a0 | 212 | __do_free char *path = NULL; |
3e625e2d | 213 | int ret; |
a3740e80 | 214 | size_t len; |
3e625e2d SH |
215 | |
216 | close(fd); | |
a73846d8 | 217 | |
a3740e80 | 218 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
1b5d4bd8 | 219 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 220 | path = must_realloc(NULL, len); |
94aeacb7 CB |
221 | ret = strnprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
222 | if (ret < 0) | |
3e625e2d | 223 | return; |
a3740e80 CB |
224 | |
225 | ret = unlink(path); | |
226 | if (ret < 0) | |
227 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
228 | } |
229 | ||
72d0e1cb | 230 | /* LOCKING |
3bc449ed SH |
231 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
232 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
233 | * container configuration file. | |
234 | * The container_disk_lock also takes the container_mem_lock. | |
235 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
236 | * NOTHING mutexes two independent programs with their own struct |
237 | * lxc_container for the same c->name, between API calls. For instance, | |
238 | * c->config_read(); c->start(); Between those calls, data on disk | |
239 | * could change (which shouldn't bother the caller unless for instance | |
240 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
241 | * Two such updaters could race. The callers should therefore check their | |
242 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
243 | * due to hung callers. So I prefer to keep the locks only within our own | |
244 | * functions, not across functions. | |
245 | * | |
3bc449ed | 246 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
247 | * c->numthreads (under privlock) before forking. When deleting, |
248 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
249 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
250 | */ | |
72d0e1cb SG |
251 | static void lxc_container_free(struct lxc_container *c) |
252 | { | |
253 | if (!c) | |
254 | return; | |
255 | ||
f10fad2f ME |
256 | free(c->configfile); |
257 | c->configfile = NULL; | |
70849dc2 | 258 | |
f10fad2f ME |
259 | free(c->error_string); |
260 | c->error_string = NULL; | |
70849dc2 | 261 | |
d95db067 | 262 | if (c->slock) { |
df271a59 | 263 | lxc_putlock(c->slock); |
d95db067 DE |
264 | c->slock = NULL; |
265 | } | |
70849dc2 | 266 | |
72d0e1cb | 267 | if (c->privlock) { |
df271a59 | 268 | lxc_putlock(c->privlock); |
72d0e1cb SG |
269 | c->privlock = NULL; |
270 | } | |
70849dc2 | 271 | |
f10fad2f ME |
272 | free(c->name); |
273 | c->name = NULL; | |
70849dc2 | 274 | |
d95db067 DE |
275 | if (c->lxc_conf) { |
276 | lxc_conf_free(c->lxc_conf); | |
277 | c->lxc_conf = NULL; | |
278 | } | |
70849dc2 | 279 | |
f10fad2f ME |
280 | free(c->config_path); |
281 | c->config_path = NULL; | |
72cf75fa | 282 | |
72d0e1cb SG |
283 | free(c); |
284 | } | |
285 | ||
045552aa CB |
286 | /* Consider the following case: |
287 | * | |
288 | * |====================================================================| | |
289 | * | freer | racing get()er | | |
290 | * |====================================================================| | |
291 | * | lxc_container_put() | lxc_container_get() | | |
292 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
293 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
294 | * | \ lxcunlock() | \ | | |
295 | * | \ lxc_container_free() | \ lxclock() returns | | |
296 | * | | \ c->numthreads < 1 -> return 0 | | |
297 | * | \ \ (free stuff) | | | |
298 | * | \ \ sem_destroy(privlock) | | | |
299 | * |_______________________________|____________________________________| | |
300 | * | |
43d1aa34 SH |
301 | * When the get()er checks numthreads the first time, one of the following |
302 | * is true: | |
303 | * 1. freer has set numthreads = 0. get() returns 0 | |
304 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
305 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
306 | * numthreads is 0 and exit without touching lxclock again.. | |
307 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
308 | * will see --numthreads = 1 and not call lxc_container_free(). | |
309 | */ | |
310 | ||
72d0e1cb SG |
311 | int lxc_container_get(struct lxc_container *c) |
312 | { | |
313 | if (!c) | |
314 | return 0; | |
315 | ||
1a0e70ac CB |
316 | /* If someone else has already started freeing the container, don't try |
317 | * to take the lock, which may be invalid. | |
318 | */ | |
43d1aa34 SH |
319 | if (c->numthreads < 1) |
320 | return 0; | |
321 | ||
5cee8c50 | 322 | if (container_mem_lock(c)) |
72d0e1cb | 323 | return 0; |
1a0e70ac CB |
324 | |
325 | /* Bail without trying to unlock, bc the privlock is now probably in | |
326 | * freed memory. | |
327 | */ | |
328 | if (c->numthreads < 1) | |
72d0e1cb | 329 | return 0; |
1a0e70ac | 330 | |
72d0e1cb | 331 | c->numthreads++; |
5cee8c50 | 332 | container_mem_unlock(c); |
045552aa | 333 | |
72d0e1cb SG |
334 | return 1; |
335 | } | |
336 | ||
337 | int lxc_container_put(struct lxc_container *c) | |
338 | { | |
339 | if (!c) | |
340 | return -1; | |
045552aa | 341 | |
5cee8c50 | 342 | if (container_mem_lock(c)) |
72d0e1cb | 343 | return -1; |
045552aa | 344 | |
44619b6c CB |
345 | c->numthreads--; |
346 | ||
347 | if (c->numthreads < 1) { | |
5cee8c50 | 348 | container_mem_unlock(c); |
72d0e1cb SG |
349 | lxc_container_free(c); |
350 | return 1; | |
351 | } | |
045552aa | 352 | |
5cee8c50 | 353 | container_mem_unlock(c); |
72d0e1cb SG |
354 | return 0; |
355 | } | |
356 | ||
858377e4 | 357 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 358 | { |
428ad142 | 359 | int statret; |
72d0e1cb SG |
360 | struct stat statbuf; |
361 | bool ret = false; | |
72d0e1cb SG |
362 | |
363 | if (!c) | |
364 | return false; | |
365 | ||
5cee8c50 | 366 | if (container_mem_lock(c)) |
72d0e1cb | 367 | return false; |
428ad142 | 368 | |
72d0e1cb | 369 | if (!c->configfile) |
428ad142 CB |
370 | goto on_error; |
371 | ||
72d0e1cb SG |
372 | statret = stat(c->configfile, &statbuf); |
373 | if (statret != 0) | |
428ad142 CB |
374 | goto on_error; |
375 | ||
72d0e1cb SG |
376 | ret = true; |
377 | ||
428ad142 | 378 | on_error: |
5cee8c50 | 379 | container_mem_unlock(c); |
72d0e1cb SG |
380 | return ret; |
381 | } | |
382 | ||
858377e4 SH |
383 | #define WRAP_API(rettype, fnname) \ |
384 | static rettype fnname(struct lxc_container *c) \ | |
385 | { \ | |
386 | rettype ret; \ | |
8164f0e2 TA |
387 | bool reset_config = false; \ |
388 | \ | |
389 | if (!current_config && c && c->lxc_conf) { \ | |
390 | current_config = c->lxc_conf; \ | |
391 | reset_config = true; \ | |
392 | } \ | |
393 | \ | |
858377e4 | 394 | ret = do_##fnname(c); \ |
8164f0e2 TA |
395 | if (reset_config) \ |
396 | current_config = NULL; \ | |
397 | \ | |
858377e4 SH |
398 | return ret; \ |
399 | } | |
400 | ||
401 | #define WRAP_API_1(rettype, fnname, t1) \ | |
402 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
403 | { \ | |
404 | rettype ret; \ | |
8164f0e2 TA |
405 | bool reset_config = false; \ |
406 | \ | |
407 | if (!current_config && c && c->lxc_conf) { \ | |
408 | current_config = c->lxc_conf; \ | |
409 | reset_config = true; \ | |
410 | } \ | |
411 | \ | |
858377e4 | 412 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
413 | if (reset_config) \ |
414 | current_config = NULL; \ | |
415 | \ | |
858377e4 SH |
416 | return ret; \ |
417 | } | |
418 | ||
419 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
420 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
421 | { \ | |
422 | rettype ret; \ | |
8164f0e2 TA |
423 | bool reset_config = false; \ |
424 | \ | |
425 | if (!current_config && c && c->lxc_conf) { \ | |
426 | current_config = c->lxc_conf; \ | |
427 | reset_config = true; \ | |
428 | } \ | |
429 | \ | |
858377e4 | 430 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
431 | if (reset_config) \ |
432 | current_config = NULL; \ | |
433 | \ | |
858377e4 SH |
434 | return ret; \ |
435 | } | |
436 | ||
437 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
438 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
439 | { \ | |
440 | rettype ret; \ | |
8164f0e2 TA |
441 | bool reset_config = false; \ |
442 | \ | |
443 | if (!current_config && c && c->lxc_conf) { \ | |
444 | current_config = c->lxc_conf; \ | |
445 | reset_config = true; \ | |
446 | } \ | |
447 | \ | |
858377e4 | 448 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
449 | if (reset_config) \ |
450 | current_config = NULL; \ | |
451 | \ | |
858377e4 SH |
452 | return ret; \ |
453 | } | |
454 | ||
29df56cd LT |
455 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
456 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
457 | t4 a4, t5 a5, t6 a6) \ | |
458 | { \ | |
459 | rettype ret; \ | |
460 | bool reset_config = false; \ | |
461 | \ | |
462 | if (!current_config && c && c->lxc_conf) { \ | |
463 | current_config = c->lxc_conf; \ | |
464 | reset_config = true; \ | |
465 | } \ | |
466 | \ | |
467 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
468 | if (reset_config) \ | |
469 | current_config = NULL; \ | |
470 | \ | |
471 | return ret; \ | |
472 | } | |
473 | ||
858377e4 SH |
474 | WRAP_API(bool, lxcapi_is_defined) |
475 | ||
476 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 477 | { |
72d0e1cb SG |
478 | lxc_state_t s; |
479 | ||
480 | if (!c) | |
481 | return NULL; | |
b547d79f | 482 | |
13f5be62 | 483 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 484 | return lxc_state2str(s); |
72d0e1cb SG |
485 | } |
486 | ||
858377e4 SH |
487 | WRAP_API(const char *, lxcapi_state) |
488 | ||
39dc698c | 489 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
490 | { |
491 | lxc_state_t s; | |
5bddcb62 | 492 | |
13f5be62 | 493 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
494 | return (s == STOPPED); |
495 | } | |
496 | ||
858377e4 | 497 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 498 | { |
72d0e1cb SG |
499 | if (!c) |
500 | return false; | |
1b61062f | 501 | |
9e630418 | 502 | return !is_stopped(c); |
72d0e1cb SG |
503 | } |
504 | ||
858377e4 SH |
505 | WRAP_API(bool, lxcapi_is_running) |
506 | ||
507 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb | 508 | { |
5ef7547f | 509 | int ret = 0; |
2341916a | 510 | lxc_state_t s; |
8787b387 | 511 | |
02f71d7e | 512 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
513 | return false; |
514 | ||
2341916a | 515 | s = lxc_getstate(c->name, c->config_path); |
97d7b200 | 516 | if (s != FROZEN) { |
5ef7547f CB |
517 | ret = cgroup_freeze(c->name, c->config_path, -1); |
518 | if (ret == -ENOCGROUP2) | |
519 | ret = lxc_freeze(c->lxc_conf, c->name, c->config_path); | |
97d7b200 | 520 | } |
8787b387 | 521 | |
5ef7547f | 522 | return ret == 0; |
72d0e1cb SG |
523 | } |
524 | ||
858377e4 SH |
525 | WRAP_API(bool, lxcapi_freeze) |
526 | ||
527 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb | 528 | { |
5ef7547f | 529 | int ret = 0; |
2341916a | 530 | lxc_state_t s; |
8e59e0ba | 531 | |
02f71d7e | 532 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
533 | return false; |
534 | ||
2341916a | 535 | s = lxc_getstate(c->name, c->config_path); |
97d7b200 | 536 | if (s == FROZEN) { |
5ef7547f CB |
537 | ret = cgroup_unfreeze(c->name, c->config_path, -1); |
538 | if (ret == -ENOCGROUP2) | |
539 | ret = lxc_unfreeze(c->lxc_conf, c->name, c->config_path); | |
97d7b200 CB |
540 | } |
541 | ||
8e59e0ba | 542 | |
5ef7547f | 543 | return ret == 0; |
72d0e1cb SG |
544 | } |
545 | ||
858377e4 SH |
546 | WRAP_API(bool, lxcapi_unfreeze) |
547 | ||
36a94ce8 | 548 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *ptxfd) |
0115f8fd | 549 | { |
0115f8fd DE |
550 | if (!c) |
551 | return -1; | |
552 | ||
36a94ce8 | 553 | return lxc_terminal_getfd(c, ttynum, ptxfd); |
0115f8fd DE |
554 | } |
555 | ||
858377e4 SH |
556 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
557 | ||
b5159817 DE |
558 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
559 | int stdoutfd, int stderrfd, int escape) | |
560 | { | |
858377e4 SH |
561 | int ret; |
562 | ||
563 | if (!c) | |
564 | return -1; | |
565 | ||
566 | current_config = c->lxc_conf; | |
567 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
568 | current_config = NULL; | |
49cfedb3 | 569 | |
858377e4 | 570 | return ret; |
b5159817 DE |
571 | } |
572 | ||
191d43cc CB |
573 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
574 | { | |
575 | int ret; | |
576 | ||
5106ecd0 | 577 | if (!c) |
578 | return -EINVAL; | |
579 | ||
191d43cc CB |
580 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); |
581 | if (ret < 0) { | |
582 | if (ret == -ENODATA) | |
63b74cda | 583 | NOTICE("The console log is empty"); |
191d43cc | 584 | else if (ret == -EFAULT) |
63b74cda CB |
585 | NOTICE("The container does not keep a console log"); |
586 | else if (ret == -ENOENT) | |
587 | NOTICE("The container does not keep a console log file"); | |
588 | else if (ret == -EIO) | |
589 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 590 | else |
63b74cda | 591 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
592 | } |
593 | ||
594 | return ret; | |
595 | } | |
596 | ||
597 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
598 | ||
858377e4 | 599 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 600 | { |
72d0e1cb SG |
601 | if (!c) |
602 | return -1; | |
603 | ||
5cee8c50 | 604 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
605 | } |
606 | ||
858377e4 SH |
607 | WRAP_API(pid_t, lxcapi_init_pid) |
608 | ||
fa3621ea CB |
609 | static int do_lxcapi_init_pidfd(struct lxc_container *c) |
610 | { | |
611 | if (!c) | |
612 | return ret_errno(EBADF); | |
613 | ||
614 | return lxc_cmd_get_init_pidfd(c->name, c->config_path); | |
615 | } | |
616 | ||
617 | WRAP_API(int, lxcapi_init_pidfd) | |
618 | ||
f797f05e CB |
619 | static int do_lxcapi_devpts_fd(struct lxc_container *c) |
620 | { | |
621 | if (!c) | |
622 | return ret_errno(EBADF); | |
623 | ||
624 | return lxc_cmd_get_devpts_fd(c->name, c->config_path); | |
625 | } | |
626 | ||
627 | WRAP_API(int, lxcapi_devpts_fd) | |
628 | ||
12a50cc6 | 629 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
630 | { |
631 | if (!c->lxc_conf) | |
632 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 633 | |
6b0d5538 SH |
634 | if (!c->lxc_conf) |
635 | return false; | |
e3246ab9 | 636 | |
d08779d4 SH |
637 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
638 | return false; | |
e3246ab9 | 639 | |
c7b17051 | 640 | c->lxc_conf->name = c->name; |
d08779d4 | 641 | return true; |
8eb5694b SH |
642 | } |
643 | ||
858377e4 | 644 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 645 | { |
39dc698c | 646 | int lret; |
12a50cc6 | 647 | const char *fname; |
d03ab308 CB |
648 | bool need_disklock = false, ret = false; |
649 | ||
72d0e1cb SG |
650 | if (!c) |
651 | return false; | |
652 | ||
653 | fname = c->configfile; | |
a73846d8 | 654 | |
72d0e1cb SG |
655 | if (alt_file) |
656 | fname = alt_file; | |
a73846d8 | 657 | |
72d0e1cb SG |
658 | if (!fname) |
659 | return false; | |
d03ab308 CB |
660 | |
661 | /* If we're reading something other than the container's config, we only | |
662 | * need to lock the in-memory container. If loading the container's | |
663 | * config file, take the disk lock. | |
39dc698c | 664 | */ |
62dcc033 | 665 | if (strequal(fname, c->configfile)) |
39dc698c SH |
666 | need_disklock = true; |
667 | ||
668 | if (need_disklock) | |
669 | lret = container_disk_lock(c); | |
670 | else | |
671 | lret = container_mem_lock(c); | |
672 | if (lret) | |
72d0e1cb | 673 | return false; |
39dc698c | 674 | |
8eb5694b | 675 | ret = load_config_locked(c, fname); |
39dc698c SH |
676 | |
677 | if (need_disklock) | |
678 | container_disk_unlock(c); | |
679 | else | |
680 | container_mem_unlock(c); | |
d03ab308 | 681 | |
72d0e1cb SG |
682 | return ret; |
683 | } | |
684 | ||
858377e4 SH |
685 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
686 | ||
687 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 688 | { |
497a2995 | 689 | if (!c || !c->lxc_conf) |
540f932a | 690 | return false; |
fb5999f6 CB |
691 | |
692 | if (container_mem_lock(c)) | |
540f932a | 693 | return false; |
fb5999f6 | 694 | |
a2739df5 | 695 | c->daemonize = state; |
d630991d | 696 | |
3bc449ed | 697 | container_mem_unlock(c); |
fb5999f6 | 698 | |
540f932a | 699 | return true; |
72d0e1cb SG |
700 | } |
701 | ||
858377e4 SH |
702 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
703 | ||
704 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
705 | { |
706 | if (!c || !c->lxc_conf) | |
49badbbe | 707 | return false; |
871ed23b CB |
708 | |
709 | if (container_mem_lock(c)) | |
49badbbe | 710 | return false; |
871ed23b | 711 | |
540f932a | 712 | c->lxc_conf->close_all_fds = state; |
d630991d | 713 | |
130a1888 | 714 | container_mem_unlock(c); |
871ed23b | 715 | |
49badbbe | 716 | return true; |
130a1888 ÇO |
717 | } |
718 | ||
858377e4 SH |
719 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
720 | ||
e202dfb8 CB |
721 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
722 | int timeout) | |
7a44c8b4 SG |
723 | { |
724 | int ret; | |
725 | ||
726 | if (!c) | |
727 | return false; | |
728 | ||
67e571de | 729 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
730 | return ret == 0; |
731 | } | |
732 | ||
858377e4 | 733 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 734 | |
2d834aa8 SH |
735 | static bool am_single_threaded(void) |
736 | { | |
4110345b | 737 | __do_closedir DIR *dir = NULL; |
d630991d | 738 | struct dirent *direntp; |
6b0297e3 | 739 | int count = 0; |
2d834aa8 | 740 | |
2d834aa8 | 741 | dir = opendir("/proc/self/task"); |
6b0297e3 | 742 | if (!dir) |
2d834aa8 | 743 | return false; |
2d834aa8 | 744 | |
74f96976 | 745 | while ((direntp = readdir(dir))) { |
62dcc033 | 746 | if (strequal(direntp->d_name, ".")) |
2d834aa8 SH |
747 | continue; |
748 | ||
62dcc033 | 749 | if (strequal(direntp->d_name, "..")) |
2d834aa8 | 750 | continue; |
6b0297e3 | 751 | |
d630991d CB |
752 | count++; |
753 | if (count > 1) | |
2d834aa8 SH |
754 | break; |
755 | } | |
6b0297e3 | 756 | |
2d834aa8 SH |
757 | return count == 1; |
758 | } | |
759 | ||
fd51a89b SH |
760 | static void push_arg(char ***argp, char *arg, int *nargs) |
761 | { | |
fd51a89b | 762 | char *copy; |
1452d3fe | 763 | char **argv; |
fd51a89b | 764 | |
d630991d | 765 | copy = must_copy_string(arg); |
1452d3fe | 766 | |
fd51a89b SH |
767 | do { |
768 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
769 | } while (!argv); | |
1452d3fe | 770 | |
fd51a89b SH |
771 | *argp = argv; |
772 | argv[*nargs] = copy; | |
773 | (*nargs)++; | |
774 | argv[*nargs] = NULL; | |
775 | } | |
776 | ||
777 | static char **split_init_cmd(const char *incmd) | |
778 | { | |
f5849fd7 CB |
779 | __do_free char *copy = NULL; |
780 | char *p; | |
fd51a89b | 781 | char **argv; |
75bd13ab | 782 | int nargs = 0; |
fd51a89b SH |
783 | |
784 | if (!incmd) | |
785 | return NULL; | |
786 | ||
f5849fd7 | 787 | copy = must_copy_string(incmd); |
fd51a89b SH |
788 | |
789 | do { | |
790 | argv = malloc(sizeof(char *)); | |
791 | } while (!argv); | |
75bd13ab | 792 | |
fd51a89b | 793 | argv[0] = NULL; |
f5849fd7 | 794 | lxc_iterate_parts (p, copy, " ") |
fd51a89b SH |
795 | push_arg(&argv, p, &nargs); |
796 | ||
797 | if (nargs == 0) { | |
798 | free(argv); | |
799 | return NULL; | |
800 | } | |
75bd13ab | 801 | |
fd51a89b SH |
802 | return argv; |
803 | } | |
804 | ||
805 | static void free_init_cmd(char **argv) | |
806 | { | |
807 | int i = 0; | |
808 | ||
809 | if (!argv) | |
810 | return; | |
702bf732 | 811 | |
fd51a89b SH |
812 | while (argv[i]) |
813 | free(argv[i++]); | |
702bf732 | 814 | |
fd51a89b SH |
815 | free(argv); |
816 | } | |
817 | ||
5e5576a4 CB |
818 | static int lxc_rcv_status(int state_socket) |
819 | { | |
a73846d8 | 820 | int ret; |
821 | int state = -1; | |
5e5576a4 | 822 | |
ee8377bd | 823 | again: |
a73846d8 | 824 | /* Receive container state. */ |
825 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
826 | if (ret <= 0) { | |
ee8377bd CB |
827 | if (errno != EINTR) |
828 | return -1; | |
a73846d8 | 829 | |
ee8377bd CB |
830 | TRACE("Caught EINTR; retrying"); |
831 | goto again; | |
832 | } | |
5e5576a4 | 833 | |
a73846d8 | 834 | return state; |
5e5576a4 CB |
835 | } |
836 | ||
837 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
838 | { | |
a73846d8 | 839 | int ret, state; |
5e5576a4 | 840 | |
c581d2a6 CB |
841 | /* The first child is going to fork() again and then exits. So we reap |
842 | * the first child here. | |
843 | */ | |
844 | ret = wait_for_pid(pid); | |
845 | if (ret < 0) | |
846 | DEBUG("Failed waiting on first child %d", pid); | |
847 | else | |
848 | DEBUG("First child %d exited", pid); | |
849 | ||
a73846d8 | 850 | /* Close write end of the socket pair. */ |
f1426d58 | 851 | close_prot_errno_disarm(handler->state_socket_pair[1]); |
5e5576a4 | 852 | |
a73846d8 | 853 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 854 | |
a73846d8 | 855 | /* Close read end of the socket pair. */ |
f1426d58 | 856 | close_prot_errno_disarm(handler->state_socket_pair[0]); |
5e5576a4 | 857 | |
a73846d8 | 858 | if (state < 0) { |
859 | SYSERROR("Failed to receive the container state"); | |
860 | return false; | |
861 | } | |
5e5576a4 | 862 | |
a73846d8 | 863 | /* If we receive anything else then running we know that the container |
864 | * failed to start. | |
865 | */ | |
866 | if (state != RUNNING) { | |
867 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
868 | lxc_state2str(state)); | |
869 | return false; | |
870 | } | |
5e5576a4 | 871 | |
a73846d8 | 872 | TRACE("Container is in \"RUNNING\" state"); |
873 | return true; | |
5e5576a4 CB |
874 | } |
875 | ||
858377e4 | 876 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
877 | { |
878 | int ret; | |
aa460476 | 879 | struct lxc_handler *handler; |
72d0e1cb | 880 | struct lxc_conf *conf; |
72d0e1cb SG |
881 | char *default_args[] = { |
882 | "/sbin/init", | |
13aad0ae | 883 | NULL, |
72d0e1cb | 884 | }; |
fd51a89b | 885 | char **init_cmd = NULL; |
72d0e1cb | 886 | |
7cb19d44 | 887 | /* container does exist */ |
72d0e1cb SG |
888 | if (!c) |
889 | return false; | |
120146b9 | 890 | |
7cb19d44 CB |
891 | /* If anything fails before we set error_num, we want an error in there. |
892 | */ | |
120146b9 SG |
893 | c->error_num = 1; |
894 | ||
7cb19d44 | 895 | /* Container has not been setup. */ |
72d0e1cb SG |
896 | if (!c->lxc_conf) |
897 | return false; | |
898 | ||
c47eafec | 899 | ret = ongoing_create(c); |
9fbe07f6 RK |
900 | switch (ret) { |
901 | case LXC_CREATE_FAILED: | |
7cb19d44 | 902 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 903 | return false; |
9fbe07f6 | 904 | case LXC_CREATE_ONGOING: |
7cb19d44 | 905 | ERROR("Ongoing container creation detected"); |
3e625e2d | 906 | return false; |
9fbe07f6 | 907 | case LXC_CREATE_INCOMPLETE: |
7cb19d44 | 908 | ERROR("Failed to create container"); |
c47eafec CB |
909 | do_lxcapi_destroy(c); |
910 | return false; | |
3e625e2d SH |
911 | } |
912 | ||
5cee8c50 | 913 | if (container_mem_lock(c)) |
72d0e1cb | 914 | return false; |
d630991d | 915 | |
72d0e1cb | 916 | conf = c->lxc_conf; |
72d0e1cb | 917 | |
aa460476 | 918 | /* initialize handler */ |
a42abcce | 919 | handler = lxc_init_handler(NULL, c->name, conf, c->config_path, c->daemonize); |
d630991d | 920 | |
dbc9832d | 921 | container_mem_unlock(c); |
aa460476 CB |
922 | if (!handler) |
923 | return false; | |
924 | ||
fa30091b CB |
925 | if (!argv) { |
926 | if (useinit && conf->execute_cmd) | |
927 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
928 | else | |
929 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
930 | } | |
fd51a89b | 931 | |
7cb19d44 | 932 | /* ... otherwise use default_args. */ |
fa30091b | 933 | if (!argv) { |
e1e76423 CB |
934 | if (useinit) { |
935 | ERROR("No valid init detected"); | |
a42abcce | 936 | lxc_put_handler(handler); |
fa30091b | 937 | return false; |
e1e76423 CB |
938 | } |
939 | argv = default_args; | |
fa30091b | 940 | } |
72d0e1cb | 941 | |
7cb19d44 CB |
942 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
943 | * here to protect the on disk container? We don't want to exclude | |
944 | * things like lxc_info while the container is running. | |
945 | */ | |
9640c6a7 | 946 | if (c->daemonize) { |
a6b6ad7b | 947 | bool started; |
0a4be28d | 948 | char title[2048]; |
c581d2a6 | 949 | pid_t pid_first, pid_second; |
71454076 | 950 | |
c581d2a6 CB |
951 | pid_first = fork(); |
952 | if (pid_first < 0) { | |
c47eafec | 953 | free_init_cmd(init_cmd); |
a42abcce | 954 | lxc_put_handler(handler); |
72d0e1cb | 955 | return false; |
f2e07cb6 | 956 | } |
6eaac303 | 957 | |
7cb19d44 | 958 | /* first parent */ |
c581d2a6 | 959 | if (pid_first != 0) { |
6eaac303 QH |
960 | /* Set to NULL because we don't want father unlink |
961 | * the PID file, child will do the free and unlink. | |
962 | */ | |
963 | c->pidfile = NULL; | |
5e5576a4 | 964 | |
7cb19d44 CB |
965 | /* Wait for container to tell us whether it started |
966 | * successfully. | |
967 | */ | |
c581d2a6 | 968 | started = wait_on_daemonized_start(handler, pid_first); |
a6b6ad7b CB |
969 | |
970 | free_init_cmd(init_cmd); | |
a42abcce | 971 | lxc_put_handler(handler); |
a6b6ad7b | 972 | return started; |
6eaac303 | 973 | } |
025ed0f3 | 974 | |
7cb19d44 CB |
975 | /* first child */ |
976 | ||
0a4be28d | 977 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
978 | * characters. All that it means is that the proctitle will be |
979 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
bafad468 | 980 | */ |
94aeacb7 | 981 | ret = strnprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); |
bafad468 CB |
982 | if (ret > 0) { |
983 | ret = setproctitle(title); | |
984 | if (ret < 0) | |
985 | INFO("Failed to set process title to %s", title); | |
986 | else | |
987 | INFO("Set process title to %s", title); | |
988 | } | |
0a4be28d | 989 | |
7cb19d44 CB |
990 | /* We fork() a second time to be reparented to init. Like |
991 | * POSIX's daemon() function we change to "/" and redirect | |
992 | * std{in,out,err} to /dev/null. | |
993 | */ | |
c581d2a6 CB |
994 | pid_second = fork(); |
995 | if (pid_second < 0) { | |
7cb19d44 | 996 | SYSERROR("Failed to fork first child process"); |
d608fbda | 997 | _exit(EXIT_FAILURE); |
697fa639 | 998 | } |
a6b6ad7b | 999 | |
7cb19d44 | 1000 | /* second parent */ |
c581d2a6 | 1001 | if (pid_second != 0) { |
a6b6ad7b | 1002 | free_init_cmd(init_cmd); |
a42abcce | 1003 | lxc_put_handler(handler); |
d608fbda | 1004 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
1005 | } |
1006 | ||
7cb19d44 CB |
1007 | /* second child */ |
1008 | ||
1009 | /* change to / directory */ | |
1010 | ret = chdir("/"); | |
1011 | if (ret < 0) { | |
1012 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 1013 | _exit(EXIT_FAILURE); |
c278cef2 | 1014 | } |
7cb19d44 | 1015 | |
85c279bb | 1016 | ret = inherit_fds(handler, true); |
7cb19d44 | 1017 | if (ret < 0) |
d608fbda | 1018 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1019 | |
1020 | /* redirect std{in,out,err} to /dev/null */ | |
1021 | ret = null_stdfds(); | |
1022 | if (ret < 0) { | |
1023 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1024 | _exit(EXIT_FAILURE); |
69aeabac | 1025 | } |
7cb19d44 CB |
1026 | |
1027 | /* become session leader */ | |
1028 | ret = setsid(); | |
1029 | if (ret < 0) | |
0059379f | 1030 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
bafad468 CB |
1031 | } else if (!am_single_threaded()) { |
1032 | ERROR("Cannot start non-daemonized container when threaded"); | |
1033 | free_init_cmd(init_cmd); | |
a42abcce | 1034 | lxc_put_handler(handler); |
bafad468 | 1035 | return false; |
72d0e1cb SG |
1036 | } |
1037 | ||
bafad468 CB |
1038 | /* We need to write PID file after daemonize, so we always write the |
1039 | * right PID. | |
6eaac303 QH |
1040 | */ |
1041 | if (c->pidfile) { | |
a7547c5c | 1042 | int w; |
b07ea13d | 1043 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
7cea5905 | 1044 | |
94aeacb7 CB |
1045 | w = strnprintf(pidstr, sizeof(pidstr), "%d", lxc_raw_getpid()); |
1046 | if (w < 0) { | |
c47eafec | 1047 | free_init_cmd(init_cmd); |
a42abcce | 1048 | lxc_put_handler(handler); |
7cea5905 CB |
1049 | |
1050 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1051 | ||
9640c6a7 | 1052 | if (c->daemonize) |
d608fbda | 1053 | _exit(EXIT_FAILURE); |
7cea5905 | 1054 | |
6eaac303 QH |
1055 | return false; |
1056 | } | |
1057 | ||
7cea5905 CB |
1058 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1059 | if (ret < 0) { | |
c47eafec | 1060 | free_init_cmd(init_cmd); |
a42abcce | 1061 | lxc_put_handler(handler); |
7cea5905 | 1062 | |
bafad468 | 1063 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); |
7cea5905 | 1064 | |
9640c6a7 | 1065 | if (c->daemonize) |
d608fbda | 1066 | _exit(EXIT_FAILURE); |
7cea5905 | 1067 | |
6eaac303 QH |
1068 | return false; |
1069 | } | |
6eaac303 QH |
1070 | } |
1071 | ||
80308d07 | 1072 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1073 | |
a8dfe4e0 WB |
1074 | /* Unshare the mount namespace if requested */ |
1075 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1076 | ret = unshare(CLONE_NEWNS); |
1077 | if (ret < 0) { | |
bafad468 | 1078 | SYSERROR("Failed to unshare mount namespace"); |
a42abcce | 1079 | lxc_put_handler(handler); |
a6b6ad7b | 1080 | ret = 1; |
7cb19d44 | 1081 | goto on_error; |
a8dfe4e0 | 1082 | } |
7cb19d44 CB |
1083 | |
1084 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1085 | if (ret < 0) { | |
9e61fb1f | 1086 | SYSERROR("Failed to recursively turn root mount tree into dependent mount. Continuing..."); |
a42abcce | 1087 | lxc_put_handler(handler); |
a6b6ad7b | 1088 | ret = 1; |
7cb19d44 | 1089 | goto on_error; |
a8dfe4e0 WB |
1090 | } |
1091 | } | |
1092 | ||
8bee8851 | 1093 | reboot: |
80308d07 | 1094 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1095 | /* initialize handler */ |
a42abcce | 1096 | handler = lxc_init_handler(handler, c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1097 | if (!handler) { |
1098 | ret = 1; | |
7cb19d44 | 1099 | goto on_error; |
a6b6ad7b | 1100 | } |
aa460476 CB |
1101 | } |
1102 | ||
85c279bb | 1103 | ret = inherit_fds(handler, c->daemonize); |
7cb19d44 | 1104 | if (ret < 0) { |
a42abcce | 1105 | lxc_put_handler(handler); |
d2cf4c37 | 1106 | ret = 1; |
7cb19d44 | 1107 | goto on_error; |
d2cf4c37 SH |
1108 | } |
1109 | ||
9605460f | 1110 | if (useinit) |
9640c6a7 CB |
1111 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1112 | c->daemonize, &c->error_num); | |
9605460f | 1113 | else |
7bdf97d2 CB |
1114 | ret = lxc_start(argv, handler, c->config_path, c->daemonize, |
1115 | &c->error_num); | |
72d0e1cb | 1116 | |
80308d07 | 1117 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1118 | INFO("Container requested reboot"); |
80308d07 | 1119 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1120 | goto reboot; |
1121 | } | |
1122 | ||
7cb19d44 | 1123 | on_error: |
487d8008 QH |
1124 | if (c->pidfile) { |
1125 | unlink(c->pidfile); | |
1126 | free(c->pidfile); | |
1127 | c->pidfile = NULL; | |
1128 | } | |
fd51a89b SH |
1129 | free_init_cmd(init_cmd); |
1130 | ||
9640c6a7 | 1131 | if (c->daemonize && ret != 0) |
d608fbda | 1132 | _exit(EXIT_FAILURE); |
9640c6a7 | 1133 | else if (c->daemonize) |
d608fbda | 1134 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1135 | |
1136 | if (ret != 0) | |
1137 | return false; | |
1138 | ||
1139 | return true; | |
72d0e1cb SG |
1140 | } |
1141 | ||
0c14779f CB |
1142 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1143 | char *const argv[]) | |
858377e4 SH |
1144 | { |
1145 | bool ret; | |
0c14779f | 1146 | |
858377e4 SH |
1147 | current_config = c ? c->lxc_conf : NULL; |
1148 | ret = do_lxcapi_start(c, useinit, argv); | |
1149 | current_config = NULL; | |
0c14779f | 1150 | |
858377e4 SH |
1151 | return ret; |
1152 | } | |
1153 | ||
9f52e331 | 1154 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1155 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1156 | { | |
1157 | va_list ap; | |
a0e93eeb | 1158 | char **inargs = NULL; |
72d0e1cb SG |
1159 | bool bret = false; |
1160 | ||
1161 | /* container exists */ | |
1162 | if (!c) | |
1163 | return false; | |
1164 | ||
858377e4 SH |
1165 | current_config = c->lxc_conf; |
1166 | ||
72d0e1cb | 1167 | va_start(ap, useinit); |
a0e93eeb | 1168 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1169 | va_end(ap); |
9f52e331 CB |
1170 | if (!inargs) |
1171 | goto on_error; | |
72d0e1cb | 1172 | |
a0e93eeb | 1173 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1174 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1175 | |
9f52e331 | 1176 | on_error: |
72d0e1cb | 1177 | if (inargs) { |
4e03ae57 | 1178 | char **arg; |
a73846d8 | 1179 | |
4e03ae57 DE |
1180 | for (arg = inargs; *arg; arg++) |
1181 | free(*arg); | |
72d0e1cb SG |
1182 | free(inargs); |
1183 | } | |
1184 | ||
858377e4 | 1185 | current_config = NULL; |
9f52e331 | 1186 | |
72d0e1cb SG |
1187 | return bret; |
1188 | } | |
1189 | ||
858377e4 | 1190 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1191 | { |
1192 | int ret; | |
1193 | ||
1194 | if (!c) | |
1195 | return false; | |
1196 | ||
ef6e34ee | 1197 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1198 | |
d775f21b | 1199 | return ret == 0; |
72d0e1cb SG |
1200 | } |
1201 | ||
858377e4 SH |
1202 | WRAP_API(bool, lxcapi_stop) |
1203 | ||
d5752559 SH |
1204 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1205 | { | |
78d44e5a | 1206 | int lasterr; |
78d44e5a CB |
1207 | int ret = -1; |
1208 | ||
d5752559 SH |
1209 | mode_t mask = umask(0002); |
1210 | ret = mkdir(path, 0770); | |
1211 | lasterr = errno; | |
1212 | umask(mask); | |
1213 | errno = lasterr; | |
1214 | if (ret) { | |
78d44e5a | 1215 | if (errno != EEXIST) |
d5752559 | 1216 | return -1; |
78d44e5a CB |
1217 | |
1218 | ret = 0; | |
d5752559 | 1219 | } |
78d44e5a | 1220 | |
0589d744 | 1221 | if (!list_empty(&conf->id_map)) { |
472a2ff9 | 1222 | ret = chown_mapped_root(path, conf); |
78d44e5a CB |
1223 | if (ret < 0) |
1224 | ret = -1; | |
d5752559 | 1225 | } |
78d44e5a | 1226 | |
d5752559 SH |
1227 | return ret; |
1228 | } | |
1229 | ||
dfa7eaeb | 1230 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1231 | static bool create_container_dir(struct lxc_container *c) |
1232 | { | |
94aeacb7 | 1233 | __do_free char *s = NULL; |
dfa7eaeb CB |
1234 | int ret; |
1235 | size_t len; | |
72d0e1cb | 1236 | |
2a59a681 | 1237 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1238 | s = malloc(len); |
1239 | if (!s) | |
1240 | return false; | |
dfa7eaeb | 1241 | |
94aeacb7 CB |
1242 | ret = strnprintf(s, len, "%s/%s", c->config_path, c->name); |
1243 | if (ret < 0) | |
72d0e1cb | 1244 | return false; |
dfa7eaeb | 1245 | |
94aeacb7 | 1246 | return do_create_container_dir(s, c->lxc_conf) == 0; |
72d0e1cb SG |
1247 | } |
1248 | ||
10bc1861 CB |
1249 | /* do_storage_create: thin wrapper around storage_create(). Like |
1250 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1251 | */ |
10bc1861 CB |
1252 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1253 | const char *type, | |
1254 | struct bdev_specs *specs) | |
1897e3bc | 1255 | { |
7a99b5a0 | 1256 | __do_free char *dest = NULL; |
e9e29a33 | 1257 | int ret; |
1897e3bc | 1258 | size_t len; |
10bc1861 | 1259 | struct lxc_storage *bdev; |
1897e3bc | 1260 | |
cd219ae6 | 1261 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1262 | if (c->lxc_conf->rootfs.path && |
1263 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1264 | const char *rpath = c->lxc_conf->rootfs.path; |
1265 | len = strlen(rpath) + 1; | |
f5849fd7 | 1266 | dest = must_realloc(NULL, len); |
94aeacb7 | 1267 | ret = strnprintf(dest, len, "%s", rpath); |
cd219ae6 | 1268 | } else { |
858377e4 | 1269 | const char *lxcpath = do_lxcapi_get_config_path(c); |
1b5d4bd8 | 1270 | len = strlen(c->name) + 1 + strlen(lxcpath) + 1 + strlen(LXC_ROOTFS_DNAME) + 1; |
f5849fd7 | 1271 | dest = must_realloc(NULL, len); |
94aeacb7 | 1272 | ret = strnprintf(dest, len, "%s/%s/%s", lxcpath, c->name, LXC_ROOTFS_DNAME); |
cd219ae6 | 1273 | } |
94aeacb7 | 1274 | if (ret < 0) |
1897e3bc SH |
1275 | return NULL; |
1276 | ||
facdf925 | 1277 | bdev = storage_create(dest, type, c->name, specs, c->lxc_conf); |
d44e88c2 | 1278 | if (!bdev) { |
e9e29a33 | 1279 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1280 | return NULL; |
d44e88c2 SH |
1281 | } |
1282 | ||
7a96a068 | 1283 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1284 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
8ea91347 | 1285 | storage_put(bdev); |
f7ac4459 CB |
1286 | return NULL; |
1287 | } | |
cf3ef16d | 1288 | |
e9e29a33 CB |
1289 | /* If we are not root, chown the rootfs dir to root in the target user |
1290 | * namespace. | |
f7ac4459 | 1291 | */ |
0589d744 | 1292 | if (am_guest_unpriv() || !list_empty(&c->lxc_conf->id_map)) { |
e9e29a33 CB |
1293 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); |
1294 | if (ret < 0) { | |
1295 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1296 | suggest_default_idmap(); |
10bc1861 | 1297 | storage_put(bdev); |
cf3ef16d SH |
1298 | return NULL; |
1299 | } | |
1300 | } | |
1301 | ||
1897e3bc SH |
1302 | return bdev; |
1303 | } | |
1304 | ||
85e02f56 PR |
1305 | /* Strip path and return name of file for argv[0] passed to execvp */ |
1306 | static char *lxctemplatefilename(char *tpath) | |
72d0e1cb | 1307 | { |
47e55887 CB |
1308 | char *p; |
1309 | ||
85e02f56 PR |
1310 | p = tpath + strlen(tpath) - 1; |
1311 | while ( (p-1) >= tpath && *(p-1) != '/') | |
96b3cb40 | 1312 | p--; |
47e55887 | 1313 | |
96b3cb40 SH |
1314 | return p; |
1315 | } | |
72d0e1cb | 1316 | |
47e55887 CB |
1317 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1318 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1319 | { |
47e55887 | 1320 | int ret; |
96b3cb40 | 1321 | pid_t pid; |
72d0e1cb | 1322 | |
72d0e1cb | 1323 | if (!tpath) |
96b3cb40 | 1324 | return true; |
72d0e1cb SG |
1325 | |
1326 | pid = fork(); | |
1327 | if (pid < 0) { | |
7e34710e | 1328 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1329 | return false; |
72d0e1cb SG |
1330 | } |
1331 | ||
1a0e70ac | 1332 | if (pid == 0) { /* child */ |
47e55887 CB |
1333 | int i, len; |
1334 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1335 | char **newargv; |
47e55887 CB |
1336 | int nargs = 0; |
1337 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1338 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1339 | uid_t euid; |
72d0e1cb | 1340 | |
47e55887 CB |
1341 | if (need_null_stdfds) { |
1342 | ret = null_stdfds(); | |
1343 | if (ret < 0) | |
1344 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1345 | } |
1897e3bc | 1346 | |
4e86cad3 CB |
1347 | ret = lxc_storage_prepare(conf); |
1348 | if (ret) { | |
47e55887 | 1349 | ERROR("Failed to initialize storage"); |
7e34710e | 1350 | _exit(EXIT_FAILURE); |
1897e3bc | 1351 | } |
4e86cad3 | 1352 | bdev = conf->rootfs.storage; |
1897e3bc | 1353 | |
47e55887 CB |
1354 | euid = geteuid(); |
1355 | if (euid == 0) { | |
1356 | ret = unshare(CLONE_NEWNS); | |
1357 | if (ret < 0) { | |
1358 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1359 | _exit(EXIT_FAILURE); |
cf3ef16d | 1360 | } |
47e55887 | 1361 | |
9e61fb1f CB |
1362 | if (detect_shared_rootfs() && mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL)) |
1363 | SYSERROR("Failed to recursively turn root mount tree into dependent mount. Continuing..."); | |
4de2791f | 1364 | } |
47e55887 | 1365 | |
62dcc033 | 1366 | if (!strequal(bdev->type, "dir") && !strequal(bdev->type, "btrfs")) { |
47e55887 CB |
1367 | if (euid != 0) { |
1368 | ERROR("Unprivileged users can only create " | |
1369 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1370 | _exit(EXIT_FAILURE); |
4de2791f | 1371 | } |
241978fa | 1372 | |
62dcc033 CB |
1373 | if (strequal(bdev->type, "overlay") || |
1374 | strequal(bdev->type, "overlayfs")) { | |
241978fa CB |
1375 | /* If we create an overlay container we need to |
1376 | * rsync the contents into | |
1377 | * <container-path>/<container-name>/rootfs. | |
1378 | * However, the overlay mount function will | |
f073d460 | 1379 | * mount |
241978fa CB |
1380 | * <container-path>/<container-name>/delta0 |
1381 | * over | |
1382 | * <container-path>/<container-name>/rootfs | |
1383 | * which means we would rsync the rootfs into | |
1384 | * the delta directory. That doesn't make sense | |
1385 | * since the delta directory only exists to | |
1386 | * record the differences to | |
1387 | * <container-path>/<container-name>/rootfs. So | |
1388 | * let's simply bind-mount here and then rsync | |
1389 | * directly into | |
1390 | * <container-path>/<container-name>/rootfs. | |
1391 | */ | |
1392 | char *src; | |
1393 | ||
1394 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1395 | if (!src) { | |
1396 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1397 | _exit(EXIT_FAILURE); |
241978fa CB |
1398 | } |
1399 | ||
1400 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1401 | if (ret < 0) { | |
1402 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1403 | _exit(EXIT_FAILURE); |
241978fa CB |
1404 | } |
1405 | } else { | |
47e55887 CB |
1406 | ret = bdev->ops->mount(bdev); |
1407 | if (ret < 0) { | |
241978fa | 1408 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1409 | _exit(EXIT_FAILURE); |
241978fa | 1410 | } |
cf3ef16d | 1411 | } |
1a0e70ac | 1412 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1413 | const char *src; |
f10fad2f | 1414 | free(bdev->dest); |
e9705550 CB |
1415 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1416 | bdev->dest = strdup(src); | |
1897e3bc SH |
1417 | } |
1418 | ||
47e55887 CB |
1419 | /* Create our new array, pre-pend the template name and base |
1420 | * args. | |
72d0e1cb SG |
1421 | */ |
1422 | if (argv) | |
a73846d8 | 1423 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1424 | ; |
a73846d8 | 1425 | |
47e55887 CB |
1426 | /* template, path, rootfs and name args */ |
1427 | nargs += 4; | |
cf3ef16d | 1428 | |
72d0e1cb SG |
1429 | newargv = malloc(nargs * sizeof(*newargv)); |
1430 | if (!newargv) | |
7e34710e | 1431 | _exit(EXIT_FAILURE); |
85e02f56 | 1432 | newargv[0] = lxctemplatefilename(tpath); |
72d0e1cb | 1433 | |
47e55887 | 1434 | /* --path */ |
2a59a681 | 1435 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1436 | patharg = malloc(len); |
1437 | if (!patharg) | |
7e34710e | 1438 | _exit(EXIT_FAILURE); |
a73846d8 | 1439 | |
94aeacb7 CB |
1440 | ret = strnprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
1441 | if (ret < 0) | |
7e34710e | 1442 | _exit(EXIT_FAILURE); |
72d0e1cb | 1443 | newargv[1] = patharg; |
47e55887 CB |
1444 | |
1445 | /* --name */ | |
72d0e1cb SG |
1446 | len = strlen("--name=") + strlen(c->name) + 1; |
1447 | namearg = malloc(len); | |
1448 | if (!namearg) | |
7e34710e | 1449 | _exit(EXIT_FAILURE); |
a73846d8 | 1450 | |
94aeacb7 CB |
1451 | ret = strnprintf(namearg, len, "--name=%s", c->name); |
1452 | if (ret < 0) | |
7e34710e | 1453 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1454 | newargv[2] = namearg; |
1455 | ||
47e55887 | 1456 | /* --rootfs */ |
1897e3bc SH |
1457 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1458 | rootfsarg = malloc(len); | |
1459 | if (!rootfsarg) | |
7e34710e | 1460 | _exit(EXIT_FAILURE); |
a73846d8 | 1461 | |
94aeacb7 CB |
1462 | ret = strnprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1463 | if (ret < 0) | |
7e34710e | 1464 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1465 | newargv[3] = rootfsarg; |
1466 | ||
72d0e1cb SG |
1467 | /* add passed-in args */ |
1468 | if (argv) | |
1897e3bc | 1469 | for (i = 4; i < nargs; i++) |
47e55887 | 1470 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1471 | |
1472 | /* add trailing NULL */ | |
1473 | nargs++; | |
1474 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1475 | if (!newargv) | |
7e34710e | 1476 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1477 | newargv[nargs - 1] = NULL; |
1478 | ||
47e55887 CB |
1479 | /* If we're running the template in a mapped userns, then we |
1480 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1481 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1482 | * the mapped uid for our geteuid() | |
cf3ef16d | 1483 | */ |
0589d744 | 1484 | if (!list_empty(&conf->id_map)) { |
47e55887 CB |
1485 | int extraargs, hostuid_mapped, hostgid_mapped; |
1486 | char **n2; | |
1487 | char txtuid[20], txtgid[20]; | |
cf3ef16d | 1488 | struct id_map *map; |
47e55887 | 1489 | int n2args = 1; |
cf3ef16d | 1490 | |
47e55887 CB |
1491 | n2 = malloc(n2args * sizeof(*n2)); |
1492 | if (!n2) | |
7e34710e | 1493 | _exit(EXIT_FAILURE); |
47e55887 | 1494 | |
cf3ef16d SH |
1495 | newargv[0] = tpath; |
1496 | tpath = "lxc-usernsexec"; | |
1497 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1498 | |
0589d744 | 1499 | list_for_each_entry(map, &conf->id_map, head) { |
cf3ef16d | 1500 | n2args += 2; |
57d116ab | 1501 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1502 | if (!n2) |
7e34710e | 1503 | _exit(EXIT_FAILURE); |
47e55887 CB |
1504 | |
1505 | n2[n2args - 2] = "-m"; | |
1506 | n2[n2args - 1] = malloc(200); | |
1507 | if (!n2[n2args - 1]) | |
7e34710e | 1508 | _exit(EXIT_FAILURE); |
47e55887 | 1509 | |
94aeacb7 | 1510 | ret = strnprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", |
47e55887 CB |
1511 | map->idtype == ID_TYPE_UID ? 'u' : 'g', |
1512 | map->nsid, map->hostid, map->range); | |
94aeacb7 | 1513 | if (ret < 0) |
7e34710e | 1514 | _exit(EXIT_FAILURE); |
cf3ef16d | 1515 | } |
47e55887 CB |
1516 | |
1517 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1518 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1519 | |
57d116ab | 1520 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1521 | if (!n2) |
7e34710e | 1522 | _exit(EXIT_FAILURE); |
47e55887 CB |
1523 | |
1524 | if (hostuid_mapped < 0) { | |
1525 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1526 | n2[n2args++] = "-m"; |
47e55887 CB |
1527 | if (hostuid_mapped < 0) { |
1528 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1529 | _exit(EXIT_FAILURE); |
cf3ef16d | 1530 | } |
47e55887 | 1531 | |
cf3ef16d | 1532 | n2[n2args++] = malloc(200); |
47e55887 | 1533 | if (!n2[n2args - 1]) { |
cf3ef16d | 1534 | SYSERROR("out of memory"); |
7e34710e | 1535 | _exit(EXIT_FAILURE); |
cf3ef16d | 1536 | } |
a73846d8 | 1537 | |
94aeacb7 | 1538 | ret = strnprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
47e55887 | 1539 | hostuid_mapped, geteuid()); |
94aeacb7 | 1540 | if (ret < 0) |
7e34710e | 1541 | _exit(EXIT_FAILURE); |
cf3ef16d | 1542 | } |
47e55887 CB |
1543 | |
1544 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1545 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1546 | |
2133f58c SH |
1547 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1548 | if (!n2) | |
7e34710e | 1549 | _exit(EXIT_FAILURE); |
47e55887 | 1550 | |
2133f58c | 1551 | if (hostgid_mapped < 0) { |
339efad9 | 1552 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1553 | n2[n2args++] = "-m"; |
1554 | if (hostgid_mapped < 0) { | |
47e55887 | 1555 | ERROR("Failed to find free gid to map"); |
7e34710e | 1556 | _exit(EXIT_FAILURE); |
2133f58c | 1557 | } |
47e55887 | 1558 | |
2133f58c | 1559 | n2[n2args++] = malloc(200); |
47e55887 | 1560 | if (!n2[n2args - 1]) { |
2133f58c | 1561 | SYSERROR("out of memory"); |
7e34710e | 1562 | _exit(EXIT_FAILURE); |
2133f58c | 1563 | } |
47e55887 | 1564 | |
94aeacb7 | 1565 | ret = strnprintf(n2[n2args - 1], 200, "g:%d:%d:1", |
47e55887 | 1566 | hostgid_mapped, getegid()); |
94aeacb7 | 1567 | if (ret < 0) |
7e34710e | 1568 | _exit(EXIT_FAILURE); |
2133f58c | 1569 | } |
a73846d8 | 1570 | |
cf3ef16d | 1571 | n2[n2args++] = "--"; |
a73846d8 | 1572 | |
cf3ef16d SH |
1573 | for (i = 0; i < nargs; i++) |
1574 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1575 | n2args += nargs; |
47e55887 CB |
1576 | |
1577 | /* Finally add "--mapped-uid $uid" to tell template what | |
1578 | * to chown cached images to. | |
1a0e70ac | 1579 | */ |
2133f58c | 1580 | n2args += 4; |
57d116ab | 1581 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1582 | if (!n2) |
7e34710e | 1583 | _exit(EXIT_FAILURE); |
47e55887 | 1584 | |
1a0e70ac | 1585 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1586 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 | 1587 | |
94aeacb7 CB |
1588 | ret = strnprintf(txtuid, 20, "%d", hostuid_mapped); |
1589 | if (ret < 0) { | |
4250ef64 CB |
1590 | free(newargv); |
1591 | free(n2); | |
1592 | _exit(EXIT_FAILURE); | |
1593 | } | |
1594 | ||
47e55887 CB |
1595 | n2[n2args - 4] = txtuid; |
1596 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1597 | |
94aeacb7 CB |
1598 | ret = strnprintf(txtgid, 20, "%d", hostgid_mapped); |
1599 | if (ret < 0) { | |
1f080b1d CB |
1600 | free(newargv); |
1601 | free(n2); | |
1602 | _exit(EXIT_FAILURE); | |
1603 | } | |
4250ef64 | 1604 | |
47e55887 CB |
1605 | n2[n2args - 2] = txtgid; |
1606 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1607 | free(newargv); |
1608 | newargv = n2; | |
1609 | } | |
47e55887 | 1610 | |
cf3ef16d | 1611 | execvp(tpath, newargv); |
e9705550 | 1612 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1613 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1614 | } |
1615 | ||
47e55887 CB |
1616 | ret = wait_for_pid(pid); |
1617 | if (ret != 0) { | |
1618 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1619 | return false; |
1620 | } | |
1621 | ||
1622 | return true; | |
1623 | } | |
1624 | ||
74a3920a | 1625 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1626 | { |
652a1f4b | 1627 | ssize_t len, flen; |
b4569e93 | 1628 | char *contents; |
3ce74686 | 1629 | FILE *f; |
025ed0f3 | 1630 | int ret = -1; |
652a1f4b | 1631 | ssize_t nbytes; |
fa2bb6ba | 1632 | #if HAVE_OPENSSL |
7c3d3976 | 1633 | unsigned int md_len = 0; |
fa2bb6ba | 1634 | unsigned char md_value[EVP_MAX_MD_SIZE]; |
b4569e93 | 1635 | char *tpath; |
52026772 | 1636 | #endif |
3ce74686 | 1637 | |
4110345b | 1638 | f = fopen(path, "re"); |
025ed0f3 | 1639 | if (f == NULL) |
3ce74686 | 1640 | return false; |
025ed0f3 | 1641 | |
630ac7c6 CB |
1642 | ret = fseek(f, 0, SEEK_END); |
1643 | if (ret < 0) | |
025ed0f3 | 1644 | goto out_error; |
630ac7c6 CB |
1645 | |
1646 | ret = -1; | |
1647 | flen = ftell(f); | |
1648 | if (flen < 0) | |
025ed0f3 | 1649 | goto out_error; |
630ac7c6 CB |
1650 | |
1651 | ret = fseek(f, 0, SEEK_SET); | |
1652 | if (ret < 0) | |
025ed0f3 | 1653 | goto out_error; |
630ac7c6 CB |
1654 | |
1655 | ret = fseek(f, 0, SEEK_SET); | |
1656 | if (ret < 0) | |
1657 | goto out_error; | |
1658 | ||
1659 | ret = -1; | |
1660 | contents = malloc(flen + 1); | |
1661 | if (!contents) | |
025ed0f3 | 1662 | goto out_error; |
630ac7c6 CB |
1663 | |
1664 | len = fread(contents, 1, flen, f); | |
1665 | if (len != flen) | |
025ed0f3 SH |
1666 | goto out_free_contents; |
1667 | ||
3ce74686 | 1668 | contents[flen] = '\0'; |
a73846d8 | 1669 | |
025ed0f3 | 1670 | ret = fclose(f); |
025ed0f3 SH |
1671 | f = NULL; |
1672 | if (ret < 0) | |
1673 | goto out_free_contents; | |
3ce74686 | 1674 | |
fa2bb6ba | 1675 | #if HAVE_OPENSSL |
01efd4d3 | 1676 | tpath = get_template_path(t); |
85db5535 | 1677 | if (!tpath) { |
630ac7c6 | 1678 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1679 | goto out_free_contents; |
3ce74686 SH |
1680 | } |
1681 | ||
fa2bb6ba | 1682 | ret = sha1sum_file(tpath, md_value, &md_len); |
85db5535 | 1683 | if (ret < 0) { |
630ac7c6 | 1684 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1685 | free(tpath); |
85db5535 | 1686 | goto out_free_contents; |
3ce74686 | 1687 | } |
cef701ed | 1688 | free(tpath); |
3ce74686 SH |
1689 | #endif |
1690 | ||
4110345b | 1691 | f = fopen(path, "we"); |
025ed0f3 | 1692 | if (f == NULL) { |
630ac7c6 | 1693 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1694 | free(contents); |
1695 | return false; | |
1696 | } | |
630ac7c6 | 1697 | |
3ce74686 SH |
1698 | fprintf(f, "# Template used to create this container: %s\n", t); |
1699 | if (argv) { | |
1700 | fprintf(f, "# Parameters passed to the template:"); | |
1701 | while (*argv) { | |
1702 | fprintf(f, " %s", *argv); | |
1703 | argv++; | |
1704 | } | |
1705 | fprintf(f, "\n"); | |
1706 | } | |
a73846d8 | 1707 | |
fa2bb6ba | 1708 | #if HAVE_OPENSSL |
56698177 | 1709 | fprintf(f, "# Template script checksum (SHA-1): "); |
652a1f4b | 1710 | for (size_t i = 0; i < md_len; i++) |
56698177 SH |
1711 | fprintf(f, "%02x", md_value[i]); |
1712 | fprintf(f, "\n"); | |
3ce74686 | 1713 | #endif |
0520c252 | 1714 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1715 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1716 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1717 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
652a1f4b CB |
1718 | nbytes = fwrite(contents, 1, flen, f); |
1719 | if (nbytes < 0 || nbytes != flen) { | |
3ce74686 SH |
1720 | SYSERROR("Writing original contents"); |
1721 | free(contents); | |
1722 | fclose(f); | |
1723 | return false; | |
1724 | } | |
630ac7c6 | 1725 | |
025ed0f3 | 1726 | ret = 0; |
630ac7c6 | 1727 | |
025ed0f3 | 1728 | out_free_contents: |
3ce74686 | 1729 | free(contents); |
630ac7c6 | 1730 | |
025ed0f3 SH |
1731 | out_error: |
1732 | if (f) { | |
1733 | int newret; | |
025ed0f3 | 1734 | newret = fclose(f); |
025ed0f3 SH |
1735 | if (ret == 0) |
1736 | ret = newret; | |
1737 | } | |
630ac7c6 | 1738 | |
025ed0f3 SH |
1739 | if (ret < 0) { |
1740 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1741 | return false; |
1742 | } | |
630ac7c6 | 1743 | |
3ce74686 SH |
1744 | return true; |
1745 | } | |
1746 | ||
4df7f012 SH |
1747 | static void lxcapi_clear_config(struct lxc_container *c) |
1748 | { | |
e62fd16f CB |
1749 | if (!c || !c->lxc_conf) |
1750 | return; | |
1751 | ||
1752 | lxc_conf_free(c->lxc_conf); | |
1753 | c->lxc_conf = NULL; | |
4df7f012 SH |
1754 | } |
1755 | ||
858377e4 SH |
1756 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1757 | ||
96b3cb40 SH |
1758 | /* |
1759 | * lxcapi_create: | |
1760 | * create a container with the given parameters. | |
1761 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1762 | * configuration already set | |
1763 | * @t: the template to execute to instantiate the root filesystem and | |
1764 | * adjust the configuration. | |
1765 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1766 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1767 | * use. | |
1768 | * | |
1769 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1770 | * arguments, you can just pass NULL. | |
1771 | */ | |
858377e4 | 1772 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1773 | const char *bdevtype, struct bdev_specs *specs, |
1774 | int flags, char *const argv[]) | |
96b3cb40 | 1775 | { |
190f83db | 1776 | __do_free char *path_template = NULL; |
e9e29a33 | 1777 | int partial_fd; |
51f0f73b | 1778 | mode_t mask; |
96b3cb40 | 1779 | pid_t pid; |
92fa4347 | 1780 | bool ret = false, rootfs_managed = true; |
96b3cb40 SH |
1781 | |
1782 | if (!c) | |
1783 | return false; | |
1784 | ||
85db5535 | 1785 | if (t) { |
190f83db CB |
1786 | path_template = get_template_path(t); |
1787 | if (!path_template) | |
1788 | return syserror_set(ENOENT, "Template \"%s\" not found", t); | |
96b3cb40 SH |
1789 | } |
1790 | ||
e9e29a33 CB |
1791 | /* If a template is passed in, and the rootfs already is defined in the |
1792 | * container config and exists, then the caller is trying to create an | |
1793 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1794 | */ |
858377e4 | 1795 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
190f83db CB |
1796 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && path_template) |
1797 | return syserror_set(EEXIST, "Container \"%s\" already exists in \"%s\"", c->name, c->config_path); | |
cf465fe4 | 1798 | |
190f83db CB |
1799 | if (!c->lxc_conf && |
1800 | !do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) | |
1801 | return syserror_set(EINVAL, "Failed to load default configuration file %s", | |
1802 | lxc_global_config_value("lxc.default_config")); | |
96b3cb40 | 1803 | |
6c6892b5 | 1804 | if (!create_container_dir(c)) |
190f83db | 1805 | return syserror_set(EINVAL, "Failed to create container %s", c->name); |
6c6892b5 | 1806 | |
92fa4347 CB |
1807 | if (c->lxc_conf->rootfs.path) |
1808 | rootfs_managed = false; | |
1809 | ||
e9e29a33 CB |
1810 | /* If both template and rootfs.path are set, template is setup as |
1811 | * rootfs.path. The container is already created if we have a config and | |
1812 | * rootfs.path is accessible | |
0590e82c | 1813 | */ |
190f83db | 1814 | if (!c->lxc_conf->rootfs.path && !path_template) { |
e9e29a33 | 1815 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1816 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1817 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1818 | goto out; |
1819 | } | |
1820 | ret = true; | |
0590e82c | 1821 | goto out; |
00370edd | 1822 | } |
e9e29a33 CB |
1823 | |
1824 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1825 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1826 | goto out; |
e9e29a33 | 1827 | |
190f83db | 1828 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !path_template) { |
e9e29a33 CB |
1829 | /* Rootfs already existed, user just wanted to save the loaded |
1830 | * configuration. | |
1831 | */ | |
0f4cdd77 | 1832 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1833 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1834 | |
0590e82c SH |
1835 | ret = true; |
1836 | goto out; | |
a69aad27 | 1837 | } |
96b3cb40 SH |
1838 | |
1839 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1840 | partial_fd = create_partial(c); |
1841 | if (partial_fd < 0) | |
96b3cb40 SH |
1842 | goto out; |
1843 | ||
e9e29a33 | 1844 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1845 | |
51f0f73b KR |
1846 | mask = umask(0022); |
1847 | ||
e9e29a33 | 1848 | /* Create the storage. |
96b3cb40 SH |
1849 | * Note we can't do this in the same task as we use to execute the |
1850 | * template because of the way zfs works. | |
1851 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1852 | * namespace. | |
1853 | */ | |
1854 | pid = fork(); | |
1855 | if (pid < 0) { | |
e9e29a33 | 1856 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1857 | goto out_unlock; |
1858 | } | |
1859 | ||
1a0e70ac | 1860 | if (pid == 0) { /* child */ |
10bc1861 | 1861 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1862 | |
10bc1861 CB |
1863 | bdev = do_storage_create(c, bdevtype, specs); |
1864 | if (!bdev) { | |
e9e29a33 CB |
1865 | ERROR("Failed to create %s storage for %s", |
1866 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1867 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1868 | } |
1869 | ||
e9e29a33 | 1870 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1871 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1872 | ERROR("Failed to save initial config for %s", c->name); |
1873 | /* Parent task won't see the storage driver in the | |
1874 | * config so we delete it. | |
1875 | */ | |
96b3cb40 SH |
1876 | bdev->ops->umount(bdev); |
1877 | bdev->ops->destroy(bdev); | |
85aec4ac | 1878 | _exit(EXIT_FAILURE); |
96b3cb40 | 1879 | } |
a73846d8 | 1880 | |
85aec4ac | 1881 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1882 | } |
a73846d8 | 1883 | |
96b3cb40 | 1884 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1885 | goto out_unlock; |
96b3cb40 | 1886 | |
e9e29a33 | 1887 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1888 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1889 | c->lxc_conf = NULL; |
a73846d8 | 1890 | |
96b3cb40 | 1891 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1892 | goto out_unlock; |
96b3cb40 | 1893 | |
190f83db | 1894 | if (!create_run_template(c, path_template, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1895 | goto out_unlock; |
1896 | ||
1a0e70ac CB |
1897 | /* Now clear out the lxc_conf we have, reload from the created |
1898 | * container. | |
1899 | */ | |
858377e4 | 1900 | do_lxcapi_clear_config(c); |
3ce74686 | 1901 | |
9d65a487 | 1902 | if (t) { |
190f83db | 1903 | if (!prepend_lxc_header(c->configfile, path_template, argv)) { |
e9e29a33 | 1904 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1905 | goto out_unlock; |
1906 | } | |
3ce74686 | 1907 | } |
a73846d8 | 1908 | |
a69aad27 | 1909 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1910 | |
1911 | out_unlock: | |
51f0f73b | 1912 | umask(mask); |
b20e0599 | 1913 | remove_partial(c, partial_fd); |
a73846d8 | 1914 | |
72d0e1cb | 1915 | out: |
92fa4347 CB |
1916 | if (!ret) { |
1917 | bool reset_managed = c->lxc_conf->rootfs.managed; | |
1918 | ||
1919 | /* | |
1920 | * Ensure that we don't destroy storage we didn't create | |
1921 | * ourselves. | |
1922 | */ | |
1923 | if (!rootfs_managed) | |
1924 | c->lxc_conf->rootfs.managed = false; | |
17a367d8 | 1925 | container_destroy(c, NULL); |
92fa4347 CB |
1926 | c->lxc_conf->rootfs.managed = reset_managed; |
1927 | } | |
a73846d8 | 1928 | |
a69aad27 | 1929 | return ret; |
72d0e1cb SG |
1930 | } |
1931 | ||
858377e4 | 1932 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1933 | const char *bdevtype, struct bdev_specs *specs, |
1934 | int flags, char *const argv[]) | |
858377e4 SH |
1935 | { |
1936 | bool ret; | |
a73846d8 | 1937 | |
858377e4 | 1938 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1939 | |
858377e4 SH |
1940 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1941 | current_config = NULL; | |
1942 | return ret; | |
1943 | } | |
1944 | ||
1945 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1946 | { |
f62cf1d4 | 1947 | __do_close int pidfd = -EBADF; |
9837ee46 | 1948 | pid_t pid = -1; |
9dd54153 | 1949 | int ret; |
dd267776 | 1950 | int rebootsignal = SIGINT; |
3e625e2d SH |
1951 | |
1952 | if (!c) | |
1953 | return false; | |
9dd54153 | 1954 | |
858377e4 | 1955 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1956 | return false; |
9dd54153 | 1957 | |
9837ee46 CB |
1958 | pidfd = do_lxcapi_init_pidfd(c); |
1959 | if (pidfd < 0) { | |
1960 | pid = do_lxcapi_init_pid(c); | |
1961 | if (pid <= 0) | |
1962 | return false; | |
1963 | } | |
9dd54153 | 1964 | |
dd267776 BP |
1965 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1966 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 | 1967 | |
9837ee46 CB |
1968 | if (pidfd >= 0) |
1969 | ret = lxc_raw_pidfd_send_signal(pidfd, rebootsignal, NULL, 0); | |
1970 | else | |
1971 | ret = kill(pid, rebootsignal); | |
1972 | if (ret < 0) | |
1973 | return log_warn(false, "Failed to send signal %d to pid %d", | |
1974 | rebootsignal, pid); | |
3e625e2d | 1975 | |
9dd54153 | 1976 | return true; |
3e625e2d SH |
1977 | } |
1978 | ||
858377e4 SH |
1979 | WRAP_API(bool, lxcapi_reboot) |
1980 | ||
d39b10eb CB |
1981 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
1982 | { | |
f62cf1d4 | 1983 | __do_close int pidfd = -EBADF, state_client_fd = -EBADF; |
9837ee46 CB |
1984 | int rebootsignal = SIGINT; |
1985 | pid_t pid = -1; | |
d39b10eb | 1986 | lxc_state_t states[MAX_STATE] = {0}; |
9837ee46 | 1987 | int killret, ret; |
d39b10eb CB |
1988 | |
1989 | if (!c) | |
1990 | return false; | |
1991 | ||
1992 | if (!do_lxcapi_is_running(c)) | |
1993 | return true; | |
1994 | ||
9837ee46 CB |
1995 | pidfd = do_lxcapi_init_pidfd(c); |
1996 | if (pidfd < 0) { | |
1997 | pid = do_lxcapi_init_pid(c); | |
1998 | if (pid <= 0) | |
1999 | return true; | |
2000 | } | |
d39b10eb CB |
2001 | |
2002 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2003 | rebootsignal = c->lxc_conf->rebootsignal; | |
2004 | ||
2005 | /* Add a new state client before sending the shutdown signal so that we | |
2006 | * don't miss a state. | |
2007 | */ | |
2008 | if (timeout != 0) { | |
2009 | states[RUNNING] = 2; | |
2010 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2011 | &state_client_fd); | |
2012 | if (ret < 0) | |
2013 | return false; | |
2014 | ||
2015 | if (state_client_fd < 0) | |
2016 | return false; | |
2017 | ||
2018 | if (ret == RUNNING) | |
2019 | return true; | |
2020 | ||
2021 | if (ret < MAX_STATE) | |
2022 | return false; | |
2023 | } | |
2024 | ||
2025 | /* Send reboot signal to container. */ | |
9837ee46 CB |
2026 | if (pidfd >= 0) |
2027 | killret = lxc_raw_pidfd_send_signal(pidfd, rebootsignal, NULL, 0); | |
2028 | else | |
2029 | killret = kill(pid, rebootsignal); | |
2030 | if (killret < 0) | |
3d01776c CB |
2031 | return log_warn(false, "Failed to send signal %d to pidfd(%d)/pid(%d)", rebootsignal, pidfd, pid); |
2032 | TRACE("Sent signal %d to pidfd(%d)/pid(%d)", rebootsignal, pidfd, pid); | |
d39b10eb | 2033 | |
a579fa51 | 2034 | if (timeout == 0) |
d39b10eb CB |
2035 | return true; |
2036 | ||
2037 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
d39b10eb CB |
2038 | if (ret < 0) |
2039 | return false; | |
2040 | ||
2041 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2042 | if (ret != RUNNING) | |
2043 | return false; | |
2044 | ||
2045 | return true; | |
2046 | } | |
2047 | ||
2048 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2049 | ||
858377e4 | 2050 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2051 | { |
f62cf1d4 | 2052 | __do_close int pidfd = -EBADF, state_client_fd = -EBADF; |
ea2a070b | 2053 | int haltsignal = SIGPWR; |
9837ee46 | 2054 | pid_t pid = -1; |
ea2a070b | 2055 | lxc_state_t states[MAX_STATE] = {0}; |
f8bdb6dc | 2056 | int killret, ret; |
72d0e1cb SG |
2057 | |
2058 | if (!c) | |
2059 | return false; | |
2060 | ||
858377e4 | 2061 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2062 | return true; |
f8bdb6dc | 2063 | |
9837ee46 | 2064 | pidfd = do_lxcapi_init_pidfd(c); |
08eccae8 CB |
2065 | pid = do_lxcapi_init_pid(c); |
2066 | if (pid <= 0) | |
2067 | return true; | |
330ae3d3 CB |
2068 | |
2069 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2070 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2071 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2072 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2073 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2074 | |
08eccae8 CB |
2075 | |
2076 | /* | |
2077 | * Add a new state client before sending the shutdown signal so | |
2078 | * that we don't miss a state. | |
92e35018 | 2079 | */ |
f8bdb6dc CB |
2080 | if (timeout != 0) { |
2081 | states[STOPPED] = 1; | |
2082 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2083 | &state_client_fd); | |
2084 | if (ret < 0) | |
2085 | return false; | |
92e35018 | 2086 | |
f8bdb6dc CB |
2087 | if (state_client_fd < 0) |
2088 | return false; | |
2089 | ||
2090 | if (ret == STOPPED) | |
2091 | return true; | |
591614a7 | 2092 | |
f8bdb6dc | 2093 | if (ret < MAX_STATE) |
92e35018 | 2094 | return false; |
60cd5091 | 2095 | } |
92e35018 | 2096 | |
60cd5091 RV |
2097 | if (pidfd >= 0) { |
2098 | struct pollfd pidfd_poll = { | |
2099 | .events = POLLIN, | |
2100 | .fd = pidfd, | |
2101 | }; | |
08eccae8 | 2102 | |
60cd5091 RV |
2103 | killret = lxc_raw_pidfd_send_signal(pidfd, haltsignal, |
2104 | NULL, 0); | |
2105 | if (killret < 0) | |
2106 | return log_warn(false, "Failed to send signal %d to pidfd %d", | |
2107 | haltsignal, pidfd); | |
08eccae8 | 2108 | |
60cd5091 | 2109 | TRACE("Sent signal %d to pidfd %d", haltsignal, pidfd); |
9837ee46 | 2110 | |
60cd5091 RV |
2111 | /* |
2112 | * No need for going through all of the state server | |
2113 | * complications anymore. We can just poll on pidfds. :) | |
2114 | */ | |
08eccae8 | 2115 | |
60cd5091 RV |
2116 | if (timeout != 0) { |
2117 | ret = poll(&pidfd_poll, 1, timeout * 1000); | |
2118 | if (ret < 0 || !(pidfd_poll.revents & POLLIN)) | |
2119 | return false; | |
08eccae8 | 2120 | |
60cd5091 | 2121 | TRACE("Pidfd polling detected container exit"); |
08eccae8 | 2122 | } |
60cd5091 RV |
2123 | } else { |
2124 | killret = kill(pid, haltsignal); | |
2125 | if (killret < 0) | |
2126 | return log_warn(false, "Failed to send signal %d to pid %d", | |
2127 | haltsignal, pid); | |
2128 | ||
2129 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
9837ee46 | 2130 | } |
f8bdb6dc | 2131 | |
923929f6 | 2132 | if (timeout == 0) |
f8bdb6dc CB |
2133 | return true; |
2134 | ||
2135 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
f8bdb6dc CB |
2136 | if (ret < 0) |
2137 | return false; | |
2138 | ||
2139 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2140 | if (ret != STOPPED) | |
2141 | return false; | |
2142 | ||
2143 | return true; | |
72d0e1cb SG |
2144 | } |
2145 | ||
858377e4 SH |
2146 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2147 | ||
1897e3bc | 2148 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2149 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2150 | { |
2151 | bool bret = false; | |
a0e93eeb | 2152 | char **args = NULL; |
72d0e1cb | 2153 | va_list ap; |
72d0e1cb SG |
2154 | |
2155 | if (!c) | |
2156 | return false; | |
2157 | ||
858377e4 SH |
2158 | current_config = c->lxc_conf; |
2159 | ||
72d0e1cb SG |
2160 | /* |
2161 | * since we're going to wait for create to finish, I don't think we | |
2162 | * need to get a copy of the arguments. | |
2163 | */ | |
dc23c1c8 | 2164 | va_start(ap, flags); |
a0e93eeb | 2165 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2166 | va_end(ap); |
a0e93eeb | 2167 | if (!args) { |
e9e29a33 | 2168 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2169 | goto out; |
2170 | } | |
72d0e1cb | 2171 | |
858377e4 | 2172 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2173 | |
2174 | out: | |
a0e93eeb | 2175 | free(args); |
858377e4 | 2176 | current_config = NULL; |
72d0e1cb SG |
2177 | return bret; |
2178 | } | |
2179 | ||
6b0d5538 SH |
2180 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2181 | { | |
62dcc033 | 2182 | if (strequal(key, "lxc.cgroup")) |
4222a9f4 CB |
2183 | return clear_unexp_config_line(conf, key, true); |
2184 | ||
62dcc033 | 2185 | if (strequal(key, "lxc.network")) |
4222a9f4 CB |
2186 | return clear_unexp_config_line(conf, key, true); |
2187 | ||
62dcc033 | 2188 | if (strequal(key, "lxc.net")) |
4222a9f4 CB |
2189 | return clear_unexp_config_line(conf, key, true); |
2190 | ||
2191 | /* Clear a network with a specific index. */ | |
948fcf60 | 2192 | if (strnequal(key, "lxc.net.", 8)) { |
4222a9f4 CB |
2193 | int ret; |
2194 | const char *idx; | |
2195 | ||
2196 | idx = key + 8; | |
2197 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2198 | if (!ret) | |
2199 | return clear_unexp_config_line(conf, key, true); | |
2200 | } | |
2201 | ||
62dcc033 | 2202 | if (strequal(key, "lxc.hook")) |
4222a9f4 CB |
2203 | return clear_unexp_config_line(conf, key, true); |
2204 | ||
2205 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2206 | } |
2207 | ||
6afd673f CB |
2208 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2209 | const char *key) | |
72d0e1cb | 2210 | { |
6afd673f CB |
2211 | int ret = 1; |
2212 | struct lxc_config_t *config; | |
72d0e1cb SG |
2213 | |
2214 | if (!c || !c->lxc_conf) | |
2215 | return false; | |
6afd673f | 2216 | |
5cee8c50 | 2217 | if (container_mem_lock(c)) |
72d0e1cb | 2218 | return false; |
6afd673f | 2219 | |
300df83e | 2220 | config = lxc_get_config(key); |
a73846d8 | 2221 | |
6773e108 | 2222 | ret = config->clr(key, c->lxc_conf, NULL); |
6b0d5538 SH |
2223 | if (!ret) |
2224 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2225 | |
5cee8c50 | 2226 | container_mem_unlock(c); |
72d0e1cb SG |
2227 | return ret == 0; |
2228 | } | |
2229 | ||
858377e4 SH |
2230 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2231 | ||
e0f59189 | 2232 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2233 | { |
858377e4 | 2234 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2235 | |
caab004f TA |
2236 | if (pid < 0) |
2237 | return false; | |
2238 | ||
0589d744 | 2239 | if ((geteuid() != 0 || (c->lxc_conf && !list_empty(&c->lxc_conf->id_map))) && |
a73846d8 | 2240 | (access("/proc/self/ns/user", F_OK) == 0)) |
51d0854c DY |
2241 | if (!switch_to_ns(pid, "user")) |
2242 | return false; | |
a73846d8 | 2243 | |
51d0854c | 2244 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2245 | } |
2246 | ||
1a0e70ac | 2247 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2248 | static inline int string_cmp(char **first, char **second) |
2249 | { | |
2250 | return strcmp(*first, *second); | |
2251 | } | |
2252 | ||
1a0e70ac CB |
2253 | /* Used by qsort and bsearch functions for comparing container names. */ |
2254 | static inline int container_cmp(struct lxc_container **first, | |
2255 | struct lxc_container **second) | |
9c88ff1f ÇO |
2256 | { |
2257 | return strcmp((*first)->name, (*second)->name); | |
2258 | } | |
2259 | ||
2260 | static bool add_to_array(char ***names, char *cname, int pos) | |
2261 | { | |
587fc64e CB |
2262 | __do_free char *dup_cname = NULL; |
2263 | char **newnames; | |
9c88ff1f | 2264 | |
587fc64e CB |
2265 | dup_cname = strdup(cname); |
2266 | if (!dup_cname) | |
9c88ff1f ÇO |
2267 | return false; |
2268 | ||
587fc64e CB |
2269 | newnames = realloc(*names, (pos + 1) * sizeof(char *)); |
2270 | if (!newnames) | |
2271 | return ret_set_errno(false, ENOMEM); | |
2272 | ||
2273 | newnames[pos] = move_ptr(dup_cname); | |
2274 | ||
3b034c39 | 2275 | /* Sort the array as we will use binary search on it. */ |
1a0e70ac CB |
2276 | qsort(newnames, pos + 1, sizeof(char *), |
2277 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f | 2278 | |
587fc64e | 2279 | *names = newnames; |
9c88ff1f ÇO |
2280 | return true; |
2281 | } | |
2282 | ||
1a0e70ac CB |
2283 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2284 | int pos, bool sort) | |
9c88ff1f | 2285 | { |
d993287e CB |
2286 | struct lxc_container **newlist; |
2287 | ||
2288 | newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); | |
2289 | if (!newlist) | |
2290 | return ret_set_errno(false, ENOMEM); | |
9c88ff1f | 2291 | |
9c88ff1f ÇO |
2292 | newlist[pos] = c; |
2293 | ||
3b034c39 | 2294 | /* Sort the array as we will use binary search on it. */ |
2871830a | 2295 | if (sort) |
1a0e70ac CB |
2296 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2297 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f | 2298 | |
d993287e | 2299 | *list = newlist; |
9c88ff1f ÇO |
2300 | return true; |
2301 | } | |
2302 | ||
1f7dd3d5 | 2303 | static char **get_from_array(char ***names, char *cname, int size) |
9c88ff1f | 2304 | { |
ea60ca95 CB |
2305 | if (!*names) |
2306 | return NULL; | |
2307 | ||
1f7dd3d5 CB |
2308 | return bsearch(&cname, *names, size, sizeof(char *), |
2309 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2310 | } |
2311 | ||
a73846d8 | 2312 | static bool array_contains(char ***names, char *cname, int size) |
2313 | { | |
1f7dd3d5 | 2314 | if (get_from_array(names, cname, size)) |
9c88ff1f | 2315 | return true; |
a73846d8 | 2316 | |
9c88ff1f ÇO |
2317 | return false; |
2318 | } | |
2319 | ||
9f4866a6 | 2320 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2321 | { |
ae22a220 ÇO |
2322 | pid_t pid; |
2323 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2324 | char **interfaces = NULL; |
ae22a220 | 2325 | char interface[IFNAMSIZ]; |
799f29ab | 2326 | |
c4ef8f4c CB |
2327 | if (pipe2(pipefd, O_CLOEXEC)) |
2328 | return log_error_errno(NULL, errno, "Failed to create pipe"); | |
c868b261 | 2329 | |
ae22a220 ÇO |
2330 | pid = fork(); |
2331 | if (pid < 0) { | |
ae22a220 ÇO |
2332 | close(pipefd[0]); |
2333 | close(pipefd[1]); | |
c4ef8f4c | 2334 | return log_error_errno(NULL, errno, "Failed to fork task to get interfaces information"); |
ae22a220 | 2335 | } |
799f29ab | 2336 | |
c4ef8f4c CB |
2337 | if (pid == 0) { |
2338 | call_cleaner(netns_freeifaddrs) struct netns_ifaddrs *ifaddrs = NULL; | |
2339 | struct netns_ifaddrs *ifa = NULL; | |
2340 | int ret = 1; | |
2341 | int nbytes; | |
ae22a220 ÇO |
2342 | |
2343 | /* close the read-end of the pipe */ | |
2344 | close(pipefd[0]); | |
2345 | ||
e0f59189 | 2346 | if (!enter_net_ns(c)) { |
9f4866a6 | 2347 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2348 | goto out; |
2349 | } | |
2350 | ||
2351 | /* Grab the list of interfaces */ | |
c4ef8f4c | 2352 | if (netns_getifaddrs(&ifaddrs, -1, &(bool){false})) { |
9f4866a6 | 2353 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2354 | goto out; |
2355 | } | |
2356 | ||
2357 | /* Iterate through the interfaces */ | |
c4ef8f4c CB |
2358 | for (ifa = ifaddrs; ifa != NULL; |
2359 | ifa = ifa->ifa_next) { | |
2360 | nbytes = lxc_write_nointr(pipefd[1], ifa->ifa_name, IFNAMSIZ); | |
9f4866a6 | 2361 | if (nbytes < 0) |
ae22a220 | 2362 | goto out; |
9f4866a6 | 2363 | |
ae22a220 ÇO |
2364 | count++; |
2365 | } | |
a73846d8 | 2366 | |
ae22a220 ÇO |
2367 | ret = 0; |
2368 | ||
2369 | out: | |
ae22a220 ÇO |
2370 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2371 | close(pipefd[1]); | |
02c611b0 | 2372 | _exit(ret); |
799f29ab ÇO |
2373 | } |
2374 | ||
ae22a220 ÇO |
2375 | /* close the write-end of the pipe */ |
2376 | close(pipefd[1]); | |
2377 | ||
3e1e9db8 | 2378 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2379 | interface[IFNAMSIZ - 1] = '\0'; |
2380 | ||
ae22a220 | 2381 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2382 | continue; |
799f29ab | 2383 | |
9f4866a6 | 2384 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2385 | ERROR("Failed to add \"%s\" to array", interface); |
2386 | ||
9c88ff1f ÇO |
2387 | count++; |
2388 | } | |
799f29ab | 2389 | |
c4ef8f4c | 2390 | if (wait_for_pid(pid)) { |
9f4866a6 | 2391 | for (i = 0; i < count; i++) |
ae22a220 | 2392 | free(interfaces[i]); |
a73846d8 | 2393 | |
ae22a220 ÇO |
2394 | free(interfaces); |
2395 | interfaces = NULL; | |
2396 | } | |
9c88ff1f | 2397 | |
ae22a220 ÇO |
2398 | /* close the read-end of the pipe */ |
2399 | close(pipefd[0]); | |
799f29ab | 2400 | |
9c88ff1f | 2401 | /* Append NULL to the array */ |
9f4866a6 | 2402 | if (interfaces) |
9c88ff1f | 2403 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2404 | |
9c88ff1f | 2405 | return interfaces; |
799f29ab ÇO |
2406 | } |
2407 | ||
858377e4 SH |
2408 | WRAP_API(char **, lxcapi_get_interfaces) |
2409 | ||
02a0e184 CB |
2410 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2411 | const char *family, int scope) | |
799f29ab | 2412 | { |
02a0e184 | 2413 | int i, ret; |
ae22a220 | 2414 | pid_t pid; |
02a0e184 | 2415 | int pipefd[2]; |
ae22a220 | 2416 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2417 | int count = 0; |
2418 | char **addresses = NULL; | |
799f29ab | 2419 | |
0ac84f04 | 2420 | ret = pipe2(pipefd, O_CLOEXEC); |
c4ef8f4c CB |
2421 | if (ret < 0) |
2422 | return log_error_errno(NULL, errno, "Failed to create pipe"); | |
c868b261 | 2423 | |
ae22a220 ÇO |
2424 | pid = fork(); |
2425 | if (pid < 0) { | |
02a0e184 | 2426 | SYSERROR("Failed to create new process"); |
ae22a220 ÇO |
2427 | close(pipefd[0]); |
2428 | close(pipefd[1]); | |
2429 | return NULL; | |
9c83a661 SG |
2430 | } |
2431 | ||
02a0e184 | 2432 | if (pid == 0) { |
c4ef8f4c CB |
2433 | call_cleaner(netns_freeifaddrs) struct netns_ifaddrs *ifaddrs = NULL; |
2434 | struct netns_ifaddrs *ifa = NULL; | |
02a0e184 | 2435 | ssize_t nbytes; |
ae22a220 | 2436 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
a7547c5c | 2437 | char *address_ptr = NULL; |
c4ef8f4c | 2438 | void *address_ptr_tmp = NULL; |
fe218ca3 | 2439 | |
ae22a220 ÇO |
2440 | /* close the read-end of the pipe */ |
2441 | close(pipefd[0]); | |
2442 | ||
e0f59189 | 2443 | if (!enter_net_ns(c)) { |
02a0e184 | 2444 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2445 | goto out; |
9c83a661 | 2446 | } |
ae22a220 ÇO |
2447 | |
2448 | /* Grab the list of interfaces */ | |
c4ef8f4c | 2449 | if (netns_getifaddrs(&ifaddrs, -1, &(bool){false})) { |
02a0e184 | 2450 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2451 | goto out; |
2452 | } | |
2453 | ||
2454 | /* Iterate through the interfaces */ | |
c4ef8f4c CB |
2455 | for (ifa = ifaddrs; ifa; ifa = ifa->ifa_next) { |
2456 | if (ifa->ifa_addr == NULL) | |
9c83a661 SG |
2457 | continue; |
2458 | ||
6ce39620 CB |
2459 | #pragma GCC diagnostic push |
2460 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2461 | ||
c4ef8f4c | 2462 | if (ifa->ifa_addr->sa_family == AF_INET) { |
62dcc033 | 2463 | if (family && !strequal(family, "inet")) |
ae22a220 | 2464 | continue; |
02a0e184 | 2465 | |
c4ef8f4c | 2466 | address_ptr_tmp = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr; |
02a0e184 | 2467 | } else { |
62dcc033 | 2468 | if (family && !strequal(family, "inet6")) |
ae22a220 ÇO |
2469 | continue; |
2470 | ||
652a1f4b | 2471 | if (((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id != (uint32_t)scope) |
ae22a220 ÇO |
2472 | continue; |
2473 | ||
c4ef8f4c | 2474 | address_ptr_tmp = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr; |
ae22a220 ÇO |
2475 | } |
2476 | ||
6ce39620 CB |
2477 | #pragma GCC diagnostic pop |
2478 | ||
62dcc033 | 2479 | if (interface && !strequal(interface, ifa->ifa_name)) |
ae22a220 | 2480 | continue; |
62dcc033 | 2481 | else if (!interface && strequal("lo", ifa->ifa_name)) |
9c83a661 SG |
2482 | continue; |
2483 | ||
c4ef8f4c CB |
2484 | address_ptr = (char *)inet_ntop(ifa->ifa_addr->sa_family, address_ptr_tmp, |
2485 | addressOutputBuffer, | |
2486 | sizeof(addressOutputBuffer)); | |
a7547c5c | 2487 | if (!address_ptr) |
02a0e184 | 2488 | continue; |
ae22a220 | 2489 | |
a7547c5c | 2490 | nbytes = lxc_write_nointr(pipefd[1], address_ptr, INET6_ADDRSTRLEN); |
02a0e184 | 2491 | if (nbytes != INET6_ADDRSTRLEN) { |
c4ef8f4c | 2492 | SYSERROR("Failed to send ipv6 address \"%s\"", address_ptr); |
ae22a220 ÇO |
2493 | goto out; |
2494 | } | |
a73846d8 | 2495 | |
ae22a220 | 2496 | count++; |
9c83a661 | 2497 | } |
a73846d8 | 2498 | |
ae22a220 | 2499 | ret = 0; |
9c83a661 | 2500 | |
ae22a220 | 2501 | out: |
ae22a220 ÇO |
2502 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2503 | close(pipefd[1]); | |
fe1ce58c | 2504 | _exit(ret); |
6849cb5b | 2505 | } |
9c83a661 | 2506 | |
ae22a220 ÇO |
2507 | /* close the write-end of the pipe */ |
2508 | close(pipefd[1]); | |
2509 | ||
02a0e184 CB |
2510 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2511 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2512 | ||
2513 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2514 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2515 | |
9c88ff1f | 2516 | count++; |
9c83a661 SG |
2517 | } |
2518 | ||
c4ef8f4c | 2519 | if (wait_for_pid(pid)) { |
02a0e184 | 2520 | for (i = 0; i < count; i++) |
ae22a220 | 2521 | free(addresses[i]); |
02a0e184 | 2522 | |
ae22a220 ÇO |
2523 | free(addresses); |
2524 | addresses = NULL; | |
2525 | } | |
9c83a661 | 2526 | |
ae22a220 ÇO |
2527 | /* close the read-end of the pipe */ |
2528 | close(pipefd[0]); | |
9c83a661 SG |
2529 | |
2530 | /* Append NULL to the array */ | |
02a0e184 | 2531 | if (addresses) |
9c88ff1f | 2532 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2533 | |
2534 | return addresses; | |
2535 | } | |
2536 | ||
858377e4 SH |
2537 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2538 | ||
2539 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2540 | { |
fce687aa CB |
2541 | int ret = -1; |
2542 | struct lxc_config_t *config; | |
72d0e1cb SG |
2543 | |
2544 | if (!c || !c->lxc_conf) | |
2545 | return -1; | |
fce687aa | 2546 | |
5cee8c50 | 2547 | if (container_mem_lock(c)) |
72d0e1cb | 2548 | return -1; |
fce687aa | 2549 | |
300df83e | 2550 | config = lxc_get_config(key); |
6773e108 CB |
2551 | |
2552 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); | |
fce687aa | 2553 | |
5cee8c50 | 2554 | container_mem_unlock(c); |
72d0e1cb SG |
2555 | return ret; |
2556 | } | |
2557 | ||
858377e4 SH |
2558 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2559 | ||
2560 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2561 | { |
2562 | char *ret; | |
2563 | ||
2564 | if (!c || !c->lxc_conf) | |
2565 | return NULL; | |
a73846d8 | 2566 | |
8ac18377 ÇO |
2567 | if (container_mem_lock(c)) |
2568 | return NULL; | |
a73846d8 | 2569 | |
858377e4 | 2570 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2571 | container_mem_unlock(c); |
2572 | return ret; | |
2573 | } | |
2574 | ||
858377e4 SH |
2575 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2576 | ||
2577 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2578 | { |
300df83e CB |
2579 | int ret = -1; |
2580 | ||
2581 | /* List all config items. */ | |
72d0e1cb | 2582 | if (!key) |
cfc67626 | 2583 | return lxc_list_config_items(retv, inlen); |
300df83e | 2584 | |
72d0e1cb SG |
2585 | if (!c || !c->lxc_conf) |
2586 | return -1; | |
300df83e | 2587 | |
5cee8c50 | 2588 | if (container_mem_lock(c)) |
72d0e1cb | 2589 | return -1; |
300df83e CB |
2590 | |
2591 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2592 | * This is an intelligent result to show which keys are valid given the | |
2593 | * type of nic it is. | |
2594 | */ | |
948fcf60 | 2595 | if (strnequal(key, "lxc.net.", 8)) |
01f55c40 | 2596 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2597 | else |
2598 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2599 | |
5cee8c50 | 2600 | container_mem_unlock(c); |
72d0e1cb SG |
2601 | return ret; |
2602 | } | |
2603 | ||
858377e4 SH |
2604 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2605 | ||
2606 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2607 | { |
0e1a60b0 | 2608 | int fd, lret; |
39dc698c | 2609 | bool ret = false, need_disklock = false; |
39dc698c | 2610 | |
72d0e1cb SG |
2611 | if (!alt_file) |
2612 | alt_file = c->configfile; | |
a73846d8 | 2613 | |
72d0e1cb | 2614 | if (!alt_file) |
1a0e70ac | 2615 | return false; |
39dc698c | 2616 | |
1a0e70ac | 2617 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2618 | if (!c->lxc_conf) { |
858377e4 | 2619 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2620 | ERROR("Error loading default configuration file %s " |
2621 | "while saving %s", | |
2622 | lxc_global_config_value("lxc.default_config"), | |
2623 | c->name); | |
72d0e1cb SG |
2624 | return false; |
2625 | } | |
39dc698c | 2626 | } |
72d0e1cb | 2627 | |
5a3d2e1e SG |
2628 | if (!create_container_dir(c)) |
2629 | return false; | |
2630 | ||
1a0e70ac CB |
2631 | /* If we're writing to the container's config file, take the disk lock. |
2632 | * Otherwise just take the memlock to protect the struct lxc_container | |
2633 | * while we're traversing it. | |
39dc698c | 2634 | */ |
62dcc033 | 2635 | if (strequal(c->configfile, alt_file)) |
39dc698c SH |
2636 | need_disklock = true; |
2637 | ||
2638 | if (need_disklock) | |
2639 | lret = container_disk_lock(c); | |
2640 | else | |
2641 | lret = container_mem_lock(c); | |
39dc698c | 2642 | if (lret) |
72d0e1cb | 2643 | return false; |
39dc698c | 2644 | |
10034af5 | 2645 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2646 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2647 | if (fd < 0) |
2648 | goto on_error; | |
2649 | ||
2650 | lret = write_config(fd, c->lxc_conf); | |
2651 | close(fd); | |
2652 | if (lret < 0) | |
2653 | goto on_error; | |
2654 | ||
39dc698c SH |
2655 | ret = true; |
2656 | ||
0e1a60b0 | 2657 | on_error: |
39dc698c SH |
2658 | if (need_disklock) |
2659 | container_disk_unlock(c); | |
2660 | else | |
2661 | container_mem_unlock(c); | |
0e1a60b0 | 2662 | |
39dc698c | 2663 | return ret; |
72d0e1cb SG |
2664 | } |
2665 | ||
858377e4 SH |
2666 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2667 | ||
0ea055b3 CB |
2668 | |
2669 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2670 | { |
0ea055b3 CB |
2671 | FILE *f1; |
2672 | struct stat fbuf; | |
42342bed CB |
2673 | void *buf = NULL; |
2674 | char *del = NULL; | |
8a22c168 CB |
2675 | char path[PATH_MAX]; |
2676 | char newpath[PATH_MAX]; | |
0ea055b3 | 2677 | int fd, ret, n = 0, v = 0; |
dfb31b25 | 2678 | bool bret = false; |
42342bed | 2679 | size_t len = 0, bytes = 0; |
dfb31b25 | 2680 | |
0ea055b3 | 2681 | if (container_disk_lock(c0)) |
dfb31b25 | 2682 | return false; |
0ea055b3 | 2683 | |
94aeacb7 CB |
2684 | ret = strnprintf(path, sizeof(path), "%s/%s/lxc_snapshots", c0->config_path, c0->name); |
2685 | if (ret < 0) | |
dfb31b25 | 2686 | goto out; |
a73846d8 | 2687 | |
94aeacb7 CB |
2688 | ret = strnprintf(newpath, sizeof(newpath), "%s\n%s\n", c->config_path, c->name); |
2689 | if (ret < 0) | |
dfb31b25 | 2690 | goto out; |
0ea055b3 CB |
2691 | |
2692 | /* If we find an lxc-snapshot file using the old format only listing the | |
2693 | * number of snapshots we will keep using it. */ | |
4110345b | 2694 | f1 = fopen(path, "re"); |
0ea055b3 CB |
2695 | if (f1) { |
2696 | n = fscanf(f1, "%d", &v); | |
2697 | fclose(f1); | |
2698 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2699 | ret = remove(path); |
2700 | if (ret < 0) | |
6d1400b5 | 2701 | SYSERROR("Failed to remove \"%s\"", path); |
2702 | ||
0ea055b3 CB |
2703 | n = 0; |
2704 | } | |
dfb31b25 | 2705 | } |
6d1400b5 | 2706 | |
0ea055b3 CB |
2707 | if (n == 1) { |
2708 | v += inc ? 1 : -1; | |
4110345b | 2709 | f1 = fopen(path, "we"); |
0ea055b3 CB |
2710 | if (!f1) |
2711 | goto out; | |
6d1400b5 | 2712 | |
0ea055b3 CB |
2713 | if (fprintf(f1, "%d\n", v) < 0) { |
2714 | ERROR("Error writing new snapshots value"); | |
2715 | fclose(f1); | |
2716 | goto out; | |
2717 | } | |
6d1400b5 | 2718 | |
0ea055b3 CB |
2719 | ret = fclose(f1); |
2720 | if (ret != 0) { | |
2721 | SYSERROR("Error writing to or closing snapshots file"); | |
2722 | goto out; | |
2723 | } | |
2724 | } else { | |
2725 | /* Here we know that we have or can use an lxc-snapshot file | |
2726 | * using the new format. */ | |
2727 | if (inc) { | |
4110345b | 2728 | f1 = fopen(path, "ae"); |
0ea055b3 CB |
2729 | if (!f1) |
2730 | goto out; | |
2731 | ||
2732 | if (fprintf(f1, "%s", newpath) < 0) { | |
2733 | ERROR("Error writing new snapshots entry"); | |
2734 | ret = fclose(f1); | |
2735 | if (ret != 0) | |
2736 | SYSERROR("Error writing to or closing snapshots file"); | |
2737 | goto out; | |
2738 | } | |
2739 | ||
2740 | ret = fclose(f1); | |
2741 | if (ret != 0) { | |
2742 | SYSERROR("Error writing to or closing snapshots file"); | |
2743 | goto out; | |
2744 | } | |
2745 | } else if (!inc) { | |
d028235d SG |
2746 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2747 | goto out; | |
2748 | ||
2749 | if (fstat(fd, &fbuf) < 0) { | |
2750 | close(fd); | |
2751 | goto out; | |
2752 | } | |
2753 | ||
2754 | if (fbuf.st_size != 0) { | |
25086a5f | 2755 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2756 | if (buf == MAP_FAILED) { |
2757 | SYSERROR("Failed to create mapping %s", path); | |
2758 | close(fd); | |
2759 | goto out; | |
2760 | } | |
2761 | ||
2762 | len = strlen(newpath); | |
2763 | while ((del = strstr((char *)buf, newpath))) { | |
2764 | memmove(del, del + len, strlen(del) - len + 1); | |
2765 | bytes += len; | |
2766 | } | |
2767 | ||
25086a5f | 2768 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2769 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2770 | SYSERROR("Failed to truncate file %s", path); | |
2771 | close(fd); | |
2772 | goto out; | |
2773 | } | |
2774 | } | |
a73846d8 | 2775 | |
d028235d SG |
2776 | close(fd); |
2777 | } | |
0ea055b3 CB |
2778 | |
2779 | /* If the lxc-snapshot file is empty, remove it. */ | |
2780 | if (stat(path, &fbuf) < 0) | |
2781 | goto out; | |
6d1400b5 | 2782 | |
d028235d | 2783 | if (!fbuf.st_size) { |
71261a5c CB |
2784 | ret = remove(path); |
2785 | if (ret < 0) | |
2786 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2787 | } |
dfb31b25 SH |
2788 | } |
2789 | ||
2790 | bret = true; | |
2791 | ||
2792 | out: | |
0ea055b3 | 2793 | container_disk_unlock(c0); |
dfb31b25 SH |
2794 | return bret; |
2795 | } | |
2796 | ||
d825fff3 | 2797 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 | 2798 | { |
768e7ba2 CB |
2799 | __do_free char *lxcpath = NULL, *lxcname = NULL; |
2800 | __do_fclose FILE *f = NULL; | |
dfb31b25 | 2801 | size_t pathlen = 0, namelen = 0; |
768e7ba2 CB |
2802 | struct lxc_container *p; |
2803 | char path[PATH_MAX]; | |
dfb31b25 SH |
2804 | int ret; |
2805 | ||
94aeacb7 | 2806 | ret = strnprintf(path, sizeof(path), "%s/%s/lxc_rdepends", |
dfb31b25 | 2807 | c->config_path, c->name); |
94aeacb7 | 2808 | if (ret < 0) { |
dfb31b25 SH |
2809 | ERROR("Path name too long"); |
2810 | return; | |
2811 | } | |
a73846d8 | 2812 | |
4110345b | 2813 | f = fopen(path, "re"); |
768e7ba2 | 2814 | if (!f) |
dfb31b25 | 2815 | return; |
a73846d8 | 2816 | |
dfb31b25 SH |
2817 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2818 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2819 | ERROR("badly formatted file %s", path); |
768e7ba2 | 2820 | return; |
dfb31b25 | 2821 | } |
7ad37670 CB |
2822 | |
2823 | remove_trailing_newlines(lxcpath); | |
2824 | remove_trailing_newlines(lxcname); | |
2825 | ||
dfb31b25 SH |
2826 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2827 | ERROR("Unable to find dependent container %s:%s", | |
2828 | lxcpath, lxcname); | |
2829 | continue; | |
2830 | } | |
a73846d8 | 2831 | |
0ea055b3 CB |
2832 | if (!mod_rdep(p, c, inc)) |
2833 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2834 | lxcpath, lxcname); |
a73846d8 | 2835 | |
dfb31b25 SH |
2836 | lxc_container_put(p); |
2837 | } | |
dfb31b25 SH |
2838 | } |
2839 | ||
18aa217b | 2840 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2841 | { |
768e7ba2 | 2842 | __do_fclose FILE *f = NULL; |
8a22c168 | 2843 | char path[PATH_MAX]; |
dfb31b25 | 2844 | int ret, v; |
0ea055b3 | 2845 | struct stat fbuf; |
dfb31b25 | 2846 | |
94aeacb7 | 2847 | ret = strnprintf(path, sizeof(path), "%s/%s/lxc_snapshots", c->config_path, |
dfb31b25 | 2848 | c->name); |
94aeacb7 | 2849 | if (ret < 0) |
768e7ba2 | 2850 | return false; |
a73846d8 | 2851 | |
0ea055b3 CB |
2852 | /* If the file doesn't exist there are no snapshots. */ |
2853 | if (stat(path, &fbuf) < 0) | |
768e7ba2 | 2854 | return false; |
a73846d8 | 2855 | |
0ea055b3 CB |
2856 | v = fbuf.st_size; |
2857 | if (v != 0) { | |
4110345b | 2858 | f = fopen(path, "re"); |
0ea055b3 | 2859 | if (!f) |
768e7ba2 | 2860 | return false; |
a73846d8 | 2861 | |
0ea055b3 | 2862 | ret = fscanf(f, "%d", &v); |
0ea055b3 CB |
2863 | if (ret != 1) |
2864 | INFO("Container uses new lxc-snapshots format %s", path); | |
2865 | } | |
a73846d8 | 2866 | |
768e7ba2 | 2867 | return v != 0; |
dfb31b25 SH |
2868 | } |
2869 | ||
18aa217b SH |
2870 | static bool has_snapshots(struct lxc_container *c) |
2871 | { | |
4110345b | 2872 | __do_closedir DIR *dir = NULL; |
8a22c168 | 2873 | char path[PATH_MAX]; |
74f96976 | 2874 | struct dirent *direntp; |
4110345b | 2875 | int count = 0; |
18aa217b SH |
2876 | |
2877 | if (!get_snappath_dir(c, path)) | |
2878 | return false; | |
a73846d8 | 2879 | |
18aa217b SH |
2880 | dir = opendir(path); |
2881 | if (!dir) | |
2882 | return false; | |
a73846d8 | 2883 | |
74f96976 | 2884 | while ((direntp = readdir(dir))) { |
62dcc033 | 2885 | if (strequal(direntp->d_name, ".")) |
18aa217b SH |
2886 | continue; |
2887 | ||
62dcc033 | 2888 | if (strequal(direntp->d_name, "..")) |
18aa217b SH |
2889 | continue; |
2890 | count++; | |
2891 | break; | |
2892 | } | |
a73846d8 | 2893 | |
18aa217b SH |
2894 | return count > 0; |
2895 | } | |
2896 | ||
297c2d58 | 2897 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2898 | int ret; |
2899 | ||
e0010464 | 2900 | if (am_guest_unpriv()) { |
ee484f7f CB |
2901 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2902 | "storage_destroy_wrapper"); | |
2903 | if (ret < 0) | |
d028235d | 2904 | return false; |
ee484f7f | 2905 | |
d028235d SG |
2906 | return true; |
2907 | } | |
ee484f7f | 2908 | |
10bc1861 | 2909 | return storage_destroy(conf); |
297c2d58 CB |
2910 | } |
2911 | ||
4355ab5f SH |
2912 | static int lxc_rmdir_onedev_wrapper(void *data) |
2913 | { | |
2914 | char *arg = (char *) data; | |
18aa217b | 2915 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2916 | } |
2917 | ||
17a367d8 | 2918 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2919 | { |
17a367d8 CB |
2920 | char *arg = data; |
2921 | return unlink(arg); | |
2922 | } | |
2923 | ||
2924 | static bool container_destroy(struct lxc_container *c, | |
2925 | struct lxc_storage *storage) | |
2926 | { | |
2927 | const char *p1; | |
2928 | size_t len; | |
2929 | struct lxc_conf *conf; | |
2930 | char *path = NULL; | |
c868b261 | 2931 | bool bret = false; |
297c2d58 | 2932 | int ret = 0; |
72d0e1cb | 2933 | |
858377e4 | 2934 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2935 | return false; |
2936 | ||
a70a69e8 | 2937 | conf = c->lxc_conf; |
3bc449ed | 2938 | if (container_disk_lock(c)) |
72d0e1cb | 2939 | return false; |
72d0e1cb | 2940 | |
39dc698c | 2941 | if (!is_stopped(c)) { |
1a0e70ac | 2942 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2943 | ERROR("container %s is not stopped", c->name); |
2944 | goto out; | |
72d0e1cb SG |
2945 | } |
2946 | ||
5090de3e | 2947 | if (conf && !list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2948 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2949 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2950 | SYSERROR("Failed to set environment variable for container name"); |
2951 | ||
2952 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2953 | SYSERROR("Failed to set environment variable for config path"); | |
2954 | ||
2955 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2956 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2957 | ||
2958 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2959 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2960 | ||
2961 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2962 | SYSERROR("Failed to set environment variable for console path"); | |
2963 | ||
2964 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2965 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2966 | /* End of environment variable setup for hooks */ |
2967 | ||
14a7b0f9 | 2968 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2969 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2970 | goto out; |
2971 | } | |
2972 | } | |
2973 | ||
2974 | if (current_config && conf == current_config) { | |
858377e4 | 2975 | current_config = NULL; |
a73846d8 | 2976 | |
37cf711b SY |
2977 | if (conf->logfd != -1) { |
2978 | close(conf->logfd); | |
2979 | conf->logfd = -1; | |
858377e4 SH |
2980 | } |
2981 | } | |
2982 | ||
6e54330c CB |
2983 | /* LXC is not managing the storage of the container. */ |
2984 | if (conf && !conf->rootfs.managed) | |
2985 | goto on_success; | |
2986 | ||
d028235d SG |
2987 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
2988 | if (!do_destroy_container(conf)) { | |
2989 | ERROR("Error destroying rootfs for %s", c->name); | |
2990 | goto out; | |
2991 | } | |
2992 | INFO("Destroyed rootfs for %s", c->name); | |
2993 | } | |
60bf62d4 | 2994 | |
dfb31b25 SH |
2995 | mod_all_rdeps(c, false); |
2996 | ||
17a367d8 CB |
2997 | p1 = do_lxcapi_get_config_path(c); |
2998 | /* strlen(p1) | |
2999 | * + | |
3000 | * / | |
3001 | * + | |
3002 | * strlen(c->name) | |
3003 | * + | |
3004 | * / | |
3005 | * + | |
3006 | * strlen("config") = 6 | |
3007 | * + | |
3008 | * \0 | |
3009 | */ | |
1b5d4bd8 | 3010 | len = strlen(p1) + 1 + strlen(c->name) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
17a367d8 CB |
3011 | path = malloc(len); |
3012 | if (!path) { | |
3013 | ERROR("Failed to allocate memory"); | |
3014 | goto out; | |
3015 | } | |
3016 | ||
3017 | /* For an overlay container the rootfs is considered immutable and | |
3018 | * cannot be removed when restoring from a snapshot. | |
3019 | */ | |
62dcc033 CB |
3020 | if (storage && (strequal(storage->type, "overlay") || |
3021 | strequal(storage->type, "overlayfs")) && | |
17a367d8 | 3022 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { |
94aeacb7 CB |
3023 | ret = strnprintf(path, len, "%s/%s/%s", p1, c->name, LXC_CONFIG_FNAME); |
3024 | if (ret < 0) | |
17a367d8 CB |
3025 | goto out; |
3026 | ||
e0010464 | 3027 | if (am_guest_unpriv()) |
17a367d8 CB |
3028 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3029 | "lxc_unlink_exec_wrapper"); | |
3030 | else | |
3031 | ret = unlink(path); | |
3032 | if (ret < 0) { | |
3033 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3034 | path, c->name); | |
3035 | goto out; | |
3036 | } | |
3037 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3038 | ||
3039 | bret = true; | |
3040 | goto out; | |
3041 | } | |
3042 | ||
94aeacb7 CB |
3043 | ret = strnprintf(path, len, "%s/%s", p1, c->name); |
3044 | if (ret < 0) | |
17a367d8 | 3045 | goto out; |
a73846d8 | 3046 | |
e0010464 | 3047 | if (am_guest_unpriv()) |
ee484f7f CB |
3048 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3049 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3050 | else |
18aa217b | 3051 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3052 | if (ret < 0) { |
17a367d8 CB |
3053 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3054 | c->name); | |
60bf62d4 SH |
3055 | goto out; |
3056 | } | |
17a367d8 | 3057 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3058 | |
6e54330c | 3059 | on_success: |
fef48dc9 | 3060 | bret = true; |
60bf62d4 SH |
3061 | |
3062 | out: | |
17a367d8 CB |
3063 | if (path) |
3064 | free(path); | |
a73846d8 | 3065 | |
3bc449ed | 3066 | container_disk_unlock(c); |
fef48dc9 | 3067 | return bret; |
72d0e1cb SG |
3068 | } |
3069 | ||
858377e4 | 3070 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3071 | { |
3072 | if (!c || !lxcapi_is_defined(c)) | |
3073 | return false; | |
2b2655a8 | 3074 | |
6e54330c CB |
3075 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3076 | if (has_snapshots(c)) { | |
3077 | ERROR("Container %s has snapshots; not removing", c->name); | |
3078 | return false; | |
3079 | } | |
18aa217b | 3080 | |
6e54330c CB |
3081 | if (has_fs_snapshots(c)) { |
3082 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3083 | return false; | |
3084 | } | |
18aa217b SH |
3085 | } |
3086 | ||
17a367d8 | 3087 | return container_destroy(c, NULL); |
18aa217b SH |
3088 | } |
3089 | ||
858377e4 | 3090 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3091 | |
858377e4 | 3092 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3093 | { |
3094 | if (!c || !lxcapi_is_defined(c)) | |
3095 | return false; | |
a73846d8 | 3096 | |
18aa217b SH |
3097 | if (!lxcapi_snapshot_destroy_all(c)) { |
3098 | ERROR("Error deleting all snapshots"); | |
3099 | return false; | |
3100 | } | |
a73846d8 | 3101 | |
18aa217b SH |
3102 | return lxcapi_destroy(c); |
3103 | } | |
3104 | ||
858377e4 SH |
3105 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3106 | ||
0d9cd9c3 CB |
3107 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3108 | const char *v) | |
96532523 | 3109 | { |
0d9cd9c3 | 3110 | int ret; |
96532523 | 3111 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3112 | bool bret = true; |
3113 | ||
3114 | config = lxc_get_config(key); | |
0d9cd9c3 CB |
3115 | |
3116 | ret = config->set(key, v, conf, NULL); | |
3117 | if (ret < 0) | |
3118 | return -EINVAL; | |
3119 | ||
3120 | if (lxc_config_value_empty(v)) | |
3121 | do_clear_unexp_config_line(conf, key); | |
3122 | else | |
3123 | bret = do_append_unexp_config_line(conf, key, v); | |
3124 | if (!bret) | |
3125 | return -ENOMEM; | |
3126 | ||
3127 | return 0; | |
3128 | } | |
3129 | ||
3130 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3131 | const char *v) | |
3132 | { | |
3133 | int ret; | |
96532523 SH |
3134 | |
3135 | if (!c->lxc_conf) | |
3136 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3137 | |
6b0d5538 | 3138 | if (!c->lxc_conf) |
96532523 | 3139 | return false; |
4222a9f4 | 3140 | |
0d9cd9c3 CB |
3141 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3142 | if (ret < 0) | |
f979ac15 | 3143 | return false; |
4222a9f4 | 3144 | |
0d9cd9c3 | 3145 | return true; |
96532523 SH |
3146 | } |
3147 | ||
858377e4 | 3148 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3149 | { |
72d0e1cb | 3150 | bool b = false; |
72d0e1cb SG |
3151 | |
3152 | if (!c) | |
3153 | return false; | |
3154 | ||
5cee8c50 | 3155 | if (container_mem_lock(c)) |
72d0e1cb SG |
3156 | return false; |
3157 | ||
0d9cd9c3 | 3158 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3159 | |
5cee8c50 | 3160 | container_mem_unlock(c); |
72d0e1cb SG |
3161 | return b; |
3162 | } | |
3163 | ||
858377e4 SH |
3164 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3165 | ||
72d0e1cb SG |
3166 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3167 | { | |
3168 | if (!c || !c->configfile) | |
3169 | return NULL; | |
a73846d8 | 3170 | |
72d0e1cb SG |
3171 | return strdup(c->configfile); |
3172 | } | |
3173 | ||
2a59a681 SH |
3174 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3175 | { | |
3176 | if (!c || !c->config_path) | |
3177 | return NULL; | |
a73846d8 | 3178 | |
2a59a681 SH |
3179 | return (const char *)(c->config_path); |
3180 | } | |
3181 | ||
afeecbba SH |
3182 | /* |
3183 | * not for export | |
3184 | * Just recalculate the c->configfile based on the | |
3185 | * c->config_path, which must be set. | |
3186 | * The lxc_container must be locked or not yet public. | |
3187 | */ | |
3188 | static bool set_config_filename(struct lxc_container *c) | |
3189 | { | |
3190 | char *newpath; | |
3191 | int len, ret; | |
3192 | ||
3193 | if (!c->config_path) | |
3194 | return false; | |
3195 | ||
3196 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
1b5d4bd8 | 3197 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
afeecbba SH |
3198 | newpath = malloc(len); |
3199 | if (!newpath) | |
3200 | return false; | |
3201 | ||
94aeacb7 CB |
3202 | ret = strnprintf(newpath, len, "%s/%s/%s", c->config_path, c->name, LXC_CONFIG_FNAME); |
3203 | if (ret < 0) { | |
afeecbba SH |
3204 | fprintf(stderr, "Error printing out config file name\n"); |
3205 | free(newpath); | |
3206 | return false; | |
3207 | } | |
3208 | ||
f10fad2f | 3209 | free(c->configfile); |
afeecbba SH |
3210 | c->configfile = newpath; |
3211 | ||
3212 | return true; | |
3213 | } | |
3214 | ||
858377e4 | 3215 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3216 | { |
3217 | char *p; | |
3218 | bool b = false; | |
afeecbba | 3219 | char *oldpath = NULL; |
2a59a681 SH |
3220 | |
3221 | if (!c) | |
3222 | return b; | |
3223 | ||
5cee8c50 | 3224 | if (container_mem_lock(c)) |
2a59a681 SH |
3225 | return b; |
3226 | ||
3227 | p = strdup(path); | |
afeecbba SH |
3228 | if (!p) { |
3229 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3230 | goto err; |
afeecbba SH |
3231 | } |
3232 | ||
2a59a681 SH |
3233 | b = true; |
3234 | if (c->config_path) | |
afeecbba | 3235 | oldpath = c->config_path; |
2a59a681 | 3236 | c->config_path = p; |
afeecbba SH |
3237 | |
3238 | /* Since we've changed the config path, we have to change the | |
3239 | * config file name too */ | |
3240 | if (!set_config_filename(c)) { | |
3241 | ERROR("Out of memory setting new config filename"); | |
3242 | b = false; | |
3243 | free(c->config_path); | |
3244 | c->config_path = oldpath; | |
3245 | oldpath = NULL; | |
3246 | } | |
a73846d8 | 3247 | |
2a59a681 | 3248 | err: |
f10fad2f | 3249 | free(oldpath); |
5cee8c50 | 3250 | container_mem_unlock(c); |
2a59a681 SH |
3251 | return b; |
3252 | } | |
3253 | ||
858377e4 | 3254 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3255 | |
858377e4 | 3256 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 | 3257 | { |
5a076633 | 3258 | call_cleaner(cgroup_exit) struct cgroup_ops *cgroup_ops = NULL; |
69edb51d | 3259 | int ret; |
794dd120 SH |
3260 | |
3261 | if (!c) | |
3262 | return false; | |
3263 | ||
3bc449ed | 3264 | if (is_stopped(c)) |
794dd120 SH |
3265 | return false; |
3266 | ||
bfe2971a | 3267 | ret = cgroup_set(c->name, c->config_path, subsys, value); |
8dfcf0df | 3268 | if (ret < 0 && ERRNO_IS_NOT_SUPPORTED(ret)) { |
69edb51d CB |
3269 | cgroup_ops = cgroup_init(c->lxc_conf); |
3270 | if (!cgroup_ops) | |
3271 | return false; | |
2202afc9 | 3272 | |
b7aeda96 | 3273 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
69edb51d CB |
3274 | } |
3275 | ||
3276 | return ret == 0; | |
794dd120 SH |
3277 | } |
3278 | ||
858377e4 SH |
3279 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3280 | ||
3281 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3282 | { |
5a076633 | 3283 | call_cleaner(cgroup_exit) struct cgroup_ops *cgroup_ops = NULL; |
efb4b3e8 | 3284 | int ret; |
794dd120 | 3285 | |
6502006a | 3286 | if (!c) |
794dd120 SH |
3287 | return -1; |
3288 | ||
3bc449ed | 3289 | if (is_stopped(c)) |
794dd120 SH |
3290 | return -1; |
3291 | ||
bfe2971a | 3292 | ret = cgroup_get(c->name, c->config_path, subsys, retv, inlen); |
8dfcf0df | 3293 | if (ret < 0 && ERRNO_IS_NOT_SUPPORTED(ret)) { |
a29cc280 CB |
3294 | cgroup_ops = cgroup_init(c->lxc_conf); |
3295 | if (!cgroup_ops) | |
3296 | return -1; | |
3297 | ||
3298 | return cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, c->config_path); | |
3299 | } | |
2202afc9 | 3300 | |
a29cc280 | 3301 | return ret; |
794dd120 SH |
3302 | } |
3303 | ||
858377e4 SH |
3304 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3305 | ||
593e8478 | 3306 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3307 | { |
593e8478 | 3308 | return lxc_global_config_value(key); |
a8428dfa SH |
3309 | } |
3310 | ||
b6b918a1 SG |
3311 | const char *lxc_get_version(void) |
3312 | { | |
95ee490b | 3313 | return LXC_VERSION; |
b6b918a1 SG |
3314 | } |
3315 | ||
f0ca2726 | 3316 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3317 | { |
3318 | int in, out; | |
3319 | ssize_t len, ret; | |
3320 | char buf[8096]; | |
3321 | struct stat sbuf; | |
3322 | ||
3323 | if (file_exists(new)) { | |
3324 | ERROR("copy destination %s exists", new); | |
3325 | return -1; | |
3326 | } | |
a73846d8 | 3327 | |
9be53773 SH |
3328 | ret = stat(old, &sbuf); |
3329 | if (ret < 0) { | |
dfb31b25 | 3330 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3331 | return -1; |
3332 | } | |
3333 | ||
3334 | in = open(old, O_RDONLY); | |
3335 | if (in < 0) { | |
dfb31b25 | 3336 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3337 | return -1; |
3338 | } | |
a73846d8 | 3339 | |
9be53773 SH |
3340 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3341 | if (out < 0) { | |
dfb31b25 | 3342 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3343 | close(in); |
3344 | return -1; | |
3345 | } | |
3346 | ||
51a8a74c | 3347 | for (;;) { |
3e1e9db8 | 3348 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3349 | if (len < 0) { |
dfb31b25 | 3350 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3351 | goto err; |
3352 | } | |
a73846d8 | 3353 | |
9be53773 SH |
3354 | if (len == 0) |
3355 | break; | |
a73846d8 | 3356 | |
2a2a676d | 3357 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3358 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3359 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3360 | goto err; |
3361 | } | |
3362 | } | |
a73846d8 | 3363 | |
9be53773 SH |
3364 | close(in); |
3365 | close(out); | |
3366 | ||
1a0e70ac | 3367 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3368 | ret = chmod(new, sbuf.st_mode); |
3369 | if (ret) { | |
dfb31b25 | 3370 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3371 | return -1; |
3372 | } | |
3373 | ||
3374 | return 0; | |
3375 | ||
3376 | err: | |
3377 | close(in); | |
3378 | close(out); | |
3379 | return -1; | |
3380 | } | |
3381 | ||
9be53773 SH |
3382 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3383 | { | |
7a99b5a0 | 3384 | __do_free char *cpath = NULL; |
619256b5 | 3385 | int i, len, ret; |
5090de3e | 3386 | struct string_entry *entry; |
619256b5 ÇO |
3387 | |
3388 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
5090de3e CB |
3389 | cpath = malloc(len); |
3390 | if (!cpath) | |
3391 | return ret_errno(ENOMEM); | |
3392 | ||
94aeacb7 CB |
3393 | ret = strnprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); |
3394 | if (ret < 0) | |
619256b5 | 3395 | return -1; |
9be53773 | 3396 | |
5090de3e CB |
3397 | for (i = 0; i < NUM_LXC_HOOKS; i++) { |
3398 | list_for_each_entry(entry, &c->lxc_conf->hooks[i], head) { | |
3399 | __do_free char *hookname = NULL; | |
3400 | char *fname, *new_hook; | |
8a22c168 | 3401 | char tmppath[PATH_MAX]; |
5090de3e | 3402 | |
75910e07 | 3403 | fname = strrchr(entry->val, '/'); |
5090de3e | 3404 | if (!fname) |
9be53773 | 3405 | return 0; |
a73846d8 | 3406 | |
5090de3e | 3407 | /* If this hook is public - ignore. */ |
75910e07 | 3408 | if (!strnequal(entry->val, cpath, len - 1)) |
619256b5 | 3409 | continue; |
a73846d8 | 3410 | |
1a0e70ac | 3411 | /* copy the script, and change the entry in confile */ |
94aeacb7 | 3412 | ret = strnprintf(tmppath, sizeof(tmppath), "%s/%s/%s", |
9be53773 | 3413 | c->config_path, c->name, fname+1); |
94aeacb7 | 3414 | if (ret < 0) |
9be53773 | 3415 | return -1; |
a73846d8 | 3416 | |
5090de3e | 3417 | ret = copy_file(entry->val, tmppath); |
9be53773 SH |
3418 | if (ret < 0) |
3419 | return -1; | |
a73846d8 | 3420 | |
5090de3e CB |
3421 | new_hook = strdup(tmppath); |
3422 | if (!new_hook) | |
3423 | return syserror("out of memory copying hook path"); | |
a73846d8 | 3424 | |
5090de3e CB |
3425 | hookname = move_ptr(entry->val); |
3426 | entry->val = move_ptr(new_hook); | |
9be53773 SH |
3427 | } |
3428 | } | |
3429 | ||
67702c21 | 3430 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
5090de3e CB |
3431 | c->config_path, oldc->name, c->name)) { |
3432 | return syserror_ret(-1, "Error saving new hooks in clone"); | |
6b0d5538 | 3433 | } |
a73846d8 | 3434 | |
858377e4 | 3435 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3436 | return 0; |
3437 | } | |
3438 | ||
9be53773 SH |
3439 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) |
3440 | { | |
8a22c168 | 3441 | char newpath[PATH_MAX]; |
9be53773 SH |
3442 | char *oldpath = oldc->lxc_conf->fstab; |
3443 | int ret; | |
3444 | ||
3445 | if (!oldpath) | |
3446 | return 0; | |
3447 | ||
47148e96 CB |
3448 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3449 | ||
c32981c3 | 3450 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3451 | if (!p) |
3452 | return -1; | |
a73846d8 | 3453 | |
94aeacb7 | 3454 | ret = strnprintf(newpath, sizeof(newpath), "%s/%s%s", |
9be53773 | 3455 | c->config_path, c->name, p); |
94aeacb7 | 3456 | if (ret < 0) { |
9be53773 SH |
3457 | ERROR("error printing new path for %s", oldpath); |
3458 | return -1; | |
3459 | } | |
a73846d8 | 3460 | |
9be53773 SH |
3461 | if (file_exists(newpath)) { |
3462 | ERROR("error: fstab file %s exists", newpath); | |
3463 | return -1; | |
3464 | } | |
3465 | ||
3466 | if (copy_file(oldpath, newpath) < 0) { | |
3467 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3468 | return -1; | |
3469 | } | |
a73846d8 | 3470 | |
9be53773 | 3471 | free(c->lxc_conf->fstab); |
a73846d8 | 3472 | |
9be53773 SH |
3473 | c->lxc_conf->fstab = strdup(newpath); |
3474 | if (!c->lxc_conf->fstab) { | |
3475 | ERROR("error: allocating pathname"); | |
3476 | return -1; | |
3477 | } | |
a73846d8 | 3478 | |
47148e96 | 3479 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3480 | ERROR("error saving new lxctab"); |
3481 | return -1; | |
3482 | } | |
9be53773 SH |
3483 | |
3484 | return 0; | |
3485 | } | |
3486 | ||
dfb31b25 SH |
3487 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3488 | { | |
8a22c168 | 3489 | char path0[PATH_MAX], path1[PATH_MAX]; |
dfb31b25 SH |
3490 | int ret; |
3491 | ||
94aeacb7 | 3492 | ret = strnprintf(path0, sizeof(path0), "%s/%s/lxc_rdepends", c0->config_path, |
dfb31b25 | 3493 | c0->name); |
94aeacb7 | 3494 | if (ret < 0) { |
dfb31b25 SH |
3495 | WARN("Error copying reverse dependencies"); |
3496 | return; | |
3497 | } | |
a73846d8 | 3498 | |
94aeacb7 | 3499 | ret = strnprintf(path1, sizeof(path1), "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3500 | c->name); |
94aeacb7 | 3501 | if (ret < 0) { |
dfb31b25 SH |
3502 | WARN("Error copying reverse dependencies"); |
3503 | return; | |
3504 | } | |
a73846d8 | 3505 | |
dfb31b25 SH |
3506 | if (copy_file(path0, path1) < 0) { |
3507 | INFO("Error copying reverse dependencies"); | |
3508 | return; | |
3509 | } | |
3510 | } | |
3511 | ||
3512 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3513 | { | |
768e7ba2 | 3514 | __do_fclose FILE *f = NULL; |
dfb31b25 | 3515 | int ret; |
8a22c168 | 3516 | char path[PATH_MAX]; |
dfb31b25 | 3517 | |
94aeacb7 CB |
3518 | ret = strnprintf(path, sizeof(path), "%s/%s/lxc_rdepends", c->config_path, c->name); |
3519 | if (ret < 0) | |
dfb31b25 | 3520 | return false; |
a73846d8 | 3521 | |
4110345b | 3522 | f = fopen(path, "ae"); |
dfb31b25 SH |
3523 | if (!f) |
3524 | return false; | |
a73846d8 | 3525 | |
1a0e70ac | 3526 | /* If anything goes wrong, just return an error. */ |
768e7ba2 | 3527 | return fprintf(f, "%s\n%s\n", c0->config_path, c0->name) > 0; |
dfb31b25 SH |
3528 | } |
3529 | ||
15a90a10 SH |
3530 | /* |
3531 | * If the fs natively supports snapshot clones with no penalty, | |
3532 | * then default to those even if not requested. | |
3533 | * Currently we only do this for btrfs. | |
3534 | */ | |
59eac805 | 3535 | static bool should_default_to_snapshot(struct lxc_container *c0, |
15a90a10 SH |
3536 | struct lxc_container *c1) |
3537 | { | |
7a99b5a0 | 3538 | __do_free char *p0 = NULL, *p1 = NULL; |
2afdc31f | 3539 | int ret; |
15a90a10 SH |
3540 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3541 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
6e0fa6a0 | 3542 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3543 | |
f5849fd7 CB |
3544 | p0 = must_realloc(NULL, l0 + 1); |
3545 | p1 = must_realloc(NULL, l1 + 1); | |
94aeacb7 CB |
3546 | ret = strnprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3547 | if (ret < 0) | |
2afdc31f CB |
3548 | return false; |
3549 | ||
94aeacb7 CB |
3550 | ret = strnprintf(p1, l1, "%s/%s", c1->config_path, c1->name); |
3551 | if (ret < 0) | |
2afdc31f | 3552 | return false; |
9a09badc CB |
3553 | |
3554 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3555 | return false; | |
3556 | ||
6e0fa6a0 CB |
3557 | if (is_btrfs_subvol(rootfs) <= 0) |
3558 | return false; | |
3559 | ||
15a90a10 SH |
3560 | return btrfs_same_fs(p0, p1) == 0; |
3561 | } | |
3562 | ||
9be53773 | 3563 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3564 | const char *newtype, int flags, const char *bdevdata, |
3565 | uint64_t newsize) | |
9be53773 | 3566 | { |
10bc1861 | 3567 | struct lxc_storage *bdev; |
07db51a2 | 3568 | bool need_rdep; |
9be53773 | 3569 | |
15a90a10 SH |
3570 | if (should_default_to_snapshot(c0, c)) |
3571 | flags |= LXC_CLONE_SNAPSHOT; | |
3572 | ||
10bc1861 CB |
3573 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3574 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3575 | if (!bdev) { |
763429b6 | 3576 | ERROR("Error copying storage."); |
9be53773 SH |
3577 | return -1; |
3578 | } | |
763429b6 CB |
3579 | |
3580 | /* Set new rootfs. */ | |
9be53773 SH |
3581 | free(c->lxc_conf->rootfs.path); |
3582 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3583 | storage_put(bdev); |
763429b6 | 3584 | |
dfb31b25 | 3585 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3586 | ERROR("Out of memory while setting storage path."); |
3587 | return -1; | |
3588 | } | |
763429b6 | 3589 | |
7a96a068 CB |
3590 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3591 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3592 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3593 | c->lxc_conf->rootfs.path)) { |
3594 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3595 | return -1; |
3596 | } | |
763429b6 | 3597 | |
eee59f94 SH |
3598 | if (flags & LXC_CLONE_SNAPSHOT) |
3599 | copy_rdepends(c, c0); | |
a73846d8 | 3600 | |
dfb31b25 SH |
3601 | if (need_rdep) { |
3602 | if (!add_rdepends(c, c0)) | |
3603 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3604 | c->name, c0->name); |
dfb31b25 SH |
3605 | } |
3606 | ||
3607 | mod_all_rdeps(c, true); | |
3608 | ||
9be53773 SH |
3609 | return 0; |
3610 | } | |
3611 | ||
1354955b SH |
3612 | struct clone_update_data { |
3613 | struct lxc_container *c0; | |
3614 | struct lxc_container *c1; | |
3615 | int flags; | |
3616 | char **hookargs; | |
3617 | }; | |
3618 | ||
3619 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3620 | { |
1354955b SH |
3621 | struct lxc_container *c0 = data->c0; |
3622 | struct lxc_container *c = data->c1; | |
3623 | int flags = data->flags; | |
3624 | char **hookargs = data->hookargs; | |
9be53773 | 3625 | int ret = -1; |
8a22c168 | 3626 | char path[PATH_MAX]; |
10bc1861 | 3627 | struct lxc_storage *bdev; |
9be53773 | 3628 | FILE *fout; |
148e91f5 | 3629 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3630 | |
3631 | /* update hostname in rootfs */ | |
3632 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3633 | ||
8917c382 | 3634 | (void)lxc_drop_groups(); |
b58214ac | 3635 | |
1354955b SH |
3636 | if (setgid(0) < 0) { |
3637 | ERROR("Failed to setgid to 0"); | |
3638 | return -1; | |
3639 | } | |
a73846d8 | 3640 | |
1354955b SH |
3641 | if (setuid(0) < 0) { |
3642 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3643 | return -1; |
1354955b | 3644 | } |
a73846d8 | 3645 | |
1354955b SH |
3646 | if (unshare(CLONE_NEWNS) < 0) |
3647 | return -1; | |
a73846d8 | 3648 | |
4e86cad3 CB |
3649 | ret = lxc_storage_prepare(conf); |
3650 | if (ret) | |
1354955b | 3651 | return -1; |
4e86cad3 | 3652 | bdev = conf->rootfs.storage; |
a73846d8 | 3653 | |
62dcc033 | 3654 | if (!strequal(bdev->type, "dir")) { |
cf3ef16d SH |
3655 | if (unshare(CLONE_NEWNS) < 0) { |
3656 | ERROR("error unsharing mounts"); | |
4e86cad3 | 3657 | lxc_storage_put(conf); |
1354955b | 3658 | return -1; |
cf3ef16d | 3659 | } |
a73846d8 | 3660 | |
9e61fb1f CB |
3661 | if (detect_shared_rootfs() && mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL)) |
3662 | SYSERROR("Failed to recursively turn root mount tree into dependent mount. Continuing..."); | |
a73846d8 | 3663 | |
e7de366c | 3664 | if (bdev->ops->mount(bdev) < 0) { |
4e86cad3 | 3665 | lxc_storage_put(conf); |
1354955b | 3666 | return -1; |
e7de366c | 3667 | } |
1a0e70ac | 3668 | } else { /* TODO come up with a better way */ |
f10fad2f | 3669 | free(bdev->dest); |
3d7e738a | 3670 | bdev->dest = strdup(lxc_storage_get_path(bdev->src, bdev->type)); |
cf3ef16d | 3671 | } |
148e91f5 | 3672 | |
5090de3e | 3673 | if (!list_empty(&conf->hooks[LXCHOOK_CLONE])) { |
148e91f5 | 3674 | /* Start of environment variable setup for hooks */ |
a73846d8 | 3675 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3676 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3677 | |
3678 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3679 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3680 | |
3681 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3682 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3683 | |
3684 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3685 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3686 | |
3687 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3688 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3689 | |
14a7b0f9 | 3690 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3691 | ERROR("Error executing clone hook for %s", c->name); |
4e86cad3 | 3692 | lxc_storage_put(conf); |
1354955b | 3693 | return -1; |
148e91f5 SH |
3694 | } |
3695 | } | |
3696 | ||
3697 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
94aeacb7 | 3698 | ret = strnprintf(path, sizeof(path), "%s/etc/hostname", bdev->dest); |
4e86cad3 | 3699 | lxc_storage_put(conf); |
e7de366c | 3700 | |
94aeacb7 | 3701 | if (ret < 0) |
1354955b | 3702 | return -1; |
a73846d8 | 3703 | |
8058be39 | 3704 | if (!file_exists(path)) |
1354955b | 3705 | return 0; |
a73846d8 | 3706 | |
4110345b | 3707 | if (!(fout = fopen(path, "we"))) { |
959aee9c | 3708 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3709 | return 0; |
148e91f5 | 3710 | } |
a73846d8 | 3711 | |
a684f0b7 ÇO |
3712 | if (fprintf(fout, "%s", c->name) < 0) { |
3713 | fclose(fout); | |
1354955b | 3714 | return -1; |
6849cb5b | 3715 | } |
a73846d8 | 3716 | |
148e91f5 | 3717 | if (fclose(fout) < 0) |
1354955b | 3718 | return -1; |
10bc1861 | 3719 | } else { |
4e86cad3 | 3720 | lxc_storage_put(conf); |
9be53773 | 3721 | } |
e7de366c | 3722 | |
1354955b SH |
3723 | return 0; |
3724 | } | |
3725 | ||
3726 | static int clone_update_rootfs_wrapper(void *data) | |
3727 | { | |
3728 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3729 | return clone_update_rootfs(arg); | |
9be53773 SH |
3730 | } |
3731 | ||
3732 | /* | |
3733 | * We want to support: | |
3734 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3735 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3736 | ||
ba115175 CB |
3737 | -s [ implies overlay] |
3738 | -s -B overlay | |
9be53773 SH |
3739 | |
3740 | only rootfs gets converted (copied/snapshotted) on clone. | |
3741 | */ | |
3742 | ||
d5752559 | 3743 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3744 | { |
c32981c3 | 3745 | char *p = strrchr(path, '/'); |
d5752559 | 3746 | int ret = -1; |
9be53773 SH |
3747 | |
3748 | if (!p) | |
3749 | return -1; | |
a73846d8 | 3750 | |
9be53773 | 3751 | *p = '\0'; |
d028235d | 3752 | ret = do_create_container_dir(path, conf); |
9be53773 | 3753 | *p = '/'; |
a73846d8 | 3754 | |
9be53773 SH |
3755 | return ret; |
3756 | } | |
3757 | ||
858377e4 | 3758 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3759 | const char *lxcpath, int flags, |
d659597e | 3760 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3761 | char **hookargs) |
9be53773 | 3762 | { |
8a22c168 | 3763 | char newpath[PATH_MAX]; |
0e1a60b0 | 3764 | int fd, ret; |
1354955b | 3765 | struct clone_update_data data; |
3b392519 | 3766 | size_t saved_unexp_len; |
1354955b | 3767 | pid_t pid; |
17a367d8 CB |
3768 | int storage_copied = 0; |
3769 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3770 | struct lxc_container *c2 = NULL; | |
9be53773 | 3771 | |
858377e4 | 3772 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3773 | return NULL; |
3774 | ||
5cee8c50 | 3775 | if (container_mem_lock(c)) |
9be53773 | 3776 | return NULL; |
754076f5 BH |
3777 | if (!is_stopped(c) && !(flags & LXC_CLONE_ALLOW_RUNNING)) { |
3778 | ERROR("error: Original container (%s) is running. Use --allowrunning if you want to force a snapshot of the running container.", c->name); | |
9be53773 SH |
3779 | goto out; |
3780 | } | |
3781 | ||
1a0e70ac | 3782 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3783 | if (!newname) |
3784 | newname = c->name; | |
a73846d8 | 3785 | |
05d53f4c | 3786 | if (!lxcpath) |
858377e4 | 3787 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3788 | |
94aeacb7 CB |
3789 | ret = strnprintf(newpath, sizeof(newpath), "%s/%s/%s", lxcpath, newname, LXC_CONFIG_FNAME); |
3790 | if (ret < 0) { | |
9be53773 SH |
3791 | SYSERROR("clone: failed making config pathname"); |
3792 | goto out; | |
3793 | } | |
17a367d8 | 3794 | |
9be53773 SH |
3795 | if (file_exists(newpath)) { |
3796 | ERROR("error: clone: %s exists", newpath); | |
3797 | goto out; | |
3798 | } | |
3799 | ||
d5752559 | 3800 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3801 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3802 | ERROR("Error creating container dir for %s", newpath); |
3803 | goto out; | |
3804 | } | |
3805 | ||
1a0e70ac | 3806 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3807 | if (c->lxc_conf->rootfs.path) { |
3808 | origroot = c->lxc_conf->rootfs.path; | |
3809 | c->lxc_conf->rootfs.path = NULL; | |
3810 | } | |
0e1a60b0 CB |
3811 | |
3812 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3813 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3814 | if (fd < 0) { |
3815 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3816 | goto out; |
3817 | } | |
5eea90e8 SH |
3818 | |
3819 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3820 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3821 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3822 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3823 | close(fd); |
5eea90e8 SH |
3824 | goto out; |
3825 | } | |
7a96a068 | 3826 | |
7a96a068 | 3827 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3828 | write_config(fd, c->lxc_conf); |
3829 | close(fd); | |
a73846d8 | 3830 | |
8d2efe40 | 3831 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3832 | |
5eea90e8 SH |
3833 | free(c->lxc_conf->unexpanded_config); |
3834 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3835 | saved_unexp_conf = NULL; | |
3b392519 | 3836 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3837 | |
94aeacb7 CB |
3838 | ret = strnprintf(newpath, sizeof(newpath), "%s/%s/%s", lxcpath, newname, LXC_ROOTFS_DNAME); |
3839 | if (ret < 0) { | |
90b366fc CB |
3840 | SYSERROR("clone: failed making rootfs pathname"); |
3841 | goto out; | |
3842 | } | |
17a367d8 CB |
3843 | |
3844 | ret = mkdir(newpath, 0755); | |
3845 | if (ret < 0) { | |
3846 | /* For an overlay container the rootfs is considered immutable | |
3847 | * and will not have been removed when restoring from a | |
3848 | * snapshot. | |
3849 | */ | |
3850 | if (errno != ENOENT && | |
3851 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3852 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3853 | goto out; | |
3854 | } | |
9be53773 SH |
3855 | } |
3856 | ||
e0010464 | 3857 | if (am_guest_unpriv()) { |
1354955b | 3858 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3859 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3860 | goto out; |
3861 | } | |
3862 | } | |
3863 | ||
05d53f4c | 3864 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3865 | if (!c2) { |
05d53f4c SH |
3866 | ERROR("clone: failed to create new container (%s %s)", newname, |
3867 | lxcpath); | |
9be53773 SH |
3868 | goto out; |
3869 | } | |
8d2efe40 | 3870 | |
1a0e70ac | 3871 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3872 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3873 | if (ret < 0) | |
3874 | goto out; | |
9be53773 | 3875 | |
1a0e70ac | 3876 | /* update utsname */ |
3d7ad474 CB |
3877 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3878 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3879 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3880 | |
0d9cd9c3 | 3881 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3882 | ERROR("Error setting new hostname"); |
3883 | goto out; | |
3884 | } | |
96532523 SH |
3885 | } |
3886 | ||
1a0e70ac | 3887 | /* copy hooks */ |
619256b5 ÇO |
3888 | ret = copyhooks(c, c2); |
3889 | if (ret < 0) { | |
3890 | ERROR("error copying hooks"); | |
3891 | goto out; | |
9be53773 SH |
3892 | } |
3893 | ||
3894 | if (copy_fstab(c, c2) < 0) { | |
3895 | ERROR("error copying fstab"); | |
9be53773 SH |
3896 | goto out; |
3897 | } | |
3898 | ||
1a0e70ac | 3899 | /* update macaddrs */ |
6b0d5538 | 3900 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3901 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3902 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3903 | goto out; |
3904 | } | |
3905 | } | |
9be53773 | 3906 | |
1a0e70ac | 3907 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3908 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3909 | goto out; |
3910 | ||
1a0e70ac CB |
3911 | /* We've now successfully created c2's storage, so clear it out if we |
3912 | * fail after this. | |
3913 | */ | |
176d9acb SH |
3914 | storage_copied = 1; |
3915 | ||
375c2258 | 3916 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3917 | goto out; |
9be53773 | 3918 | |
1354955b SH |
3919 | if ((pid = fork()) < 0) { |
3920 | SYSERROR("fork"); | |
9be53773 | 3921 | goto out; |
1354955b | 3922 | } |
a73846d8 | 3923 | |
1354955b SH |
3924 | if (pid > 0) { |
3925 | ret = wait_for_pid(pid); | |
3926 | if (ret) | |
3927 | goto out; | |
a73846d8 | 3928 | |
1354955b SH |
3929 | container_mem_unlock(c); |
3930 | return c2; | |
3931 | } | |
a73846d8 | 3932 | |
1354955b SH |
3933 | data.c0 = c; |
3934 | data.c1 = c2; | |
3935 | data.flags = flags; | |
3936 | data.hookargs = hookargs; | |
a73846d8 | 3937 | |
e0010464 | 3938 | if (am_guest_unpriv()) |
ee484f7f CB |
3939 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3940 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3941 | else |
3942 | ret = clone_update_rootfs(&data); | |
3943 | if (ret < 0) | |
d8480a31 | 3944 | _exit(EXIT_FAILURE); |
9be53773 | 3945 | |
5cee8c50 | 3946 | container_mem_unlock(c); |
d8480a31 | 3947 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3948 | |
3949 | out: | |
5cee8c50 | 3950 | container_mem_unlock(c); |
375c2258 | 3951 | if (c2) { |
176d9acb SH |
3952 | if (!storage_copied) |
3953 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 3954 | |
375c2258 | 3955 | c2->destroy(c2); |
9be53773 | 3956 | lxc_container_put(c2); |
375c2258 | 3957 | } |
9be53773 SH |
3958 | |
3959 | return NULL; | |
3960 | } | |
3961 | ||
858377e4 SH |
3962 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3963 | const char *lxcpath, int flags, | |
3964 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3965 | char **hookargs) | |
3966 | { | |
3967 | struct lxc_container * ret; | |
a73846d8 | 3968 | |
858377e4 SH |
3969 | current_config = c ? c->lxc_conf : NULL; |
3970 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
3971 | current_config = NULL; | |
a73846d8 | 3972 | |
858377e4 SH |
3973 | return ret; |
3974 | } | |
3975 | ||
3976 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 3977 | { |
10bc1861 | 3978 | struct lxc_storage *bdev; |
06e5650e | 3979 | struct lxc_container *newc; |
06e5650e | 3980 | |
d693cf93 | 3981 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
3982 | return false; |
3983 | ||
18aa217b SH |
3984 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
3985 | ERROR("Renaming a container with snapshots is not supported"); | |
3986 | return false; | |
3987 | } | |
a73846d8 | 3988 | |
4e86cad3 | 3989 | if (lxc_storage_prepare(c->lxc_conf)) { |
06e5650e ÇO |
3990 | ERROR("Failed to find original backing store type"); |
3991 | return false; | |
3992 | } | |
4e86cad3 | 3993 | bdev = c->lxc_conf->rootfs.storage; |
06e5650e | 3994 | |
619256b5 | 3995 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
4e86cad3 | 3996 | lxc_storage_put(c->lxc_conf); |
06e5650e ÇO |
3997 | if (!newc) { |
3998 | lxc_container_put(newc); | |
3999 | return false; | |
4000 | } | |
4001 | ||
4002 | if (newc && lxcapi_is_defined(newc)) | |
4003 | lxc_container_put(newc); | |
4004 | ||
17a367d8 | 4005 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4006 | ERROR("Could not destroy existing container %s", c->name); |
4007 | return false; | |
4008 | } | |
a73846d8 | 4009 | |
06e5650e ÇO |
4010 | return true; |
4011 | } | |
4012 | ||
858377e4 SH |
4013 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4014 | ||
d6430143 CB |
4015 | static int lxcapi_attach(struct lxc_container *c, |
4016 | lxc_attach_exec_t exec_function, void *exec_payload, | |
4017 | lxc_attach_options_t *options, pid_t *attached_process) | |
a0e93eeb | 4018 | { |
858377e4 SH |
4019 | int ret; |
4020 | ||
a0e93eeb CS |
4021 | if (!c) |
4022 | return -1; | |
4023 | ||
858377e4 SH |
4024 | current_config = c->lxc_conf; |
4025 | ||
d6430143 CB |
4026 | ret = lxc_attach(c, exec_function, exec_payload, options, |
4027 | attached_process); | |
858377e4 SH |
4028 | current_config = NULL; |
4029 | return ret; | |
a0e93eeb CS |
4030 | } |
4031 | ||
d6430143 CB |
4032 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, |
4033 | lxc_attach_options_t *options, | |
4034 | const char *program, | |
4035 | const char *const argv[]) | |
a0e93eeb CS |
4036 | { |
4037 | lxc_attach_command_t command; | |
4038 | pid_t pid; | |
d6430143 | 4039 | int ret; |
a0e93eeb CS |
4040 | |
4041 | if (!c) | |
4042 | return -1; | |
4043 | ||
d6430143 CB |
4044 | command.program = (char *)program; |
4045 | command.argv = (char **)argv; | |
a73846d8 | 4046 | |
d6430143 CB |
4047 | ret = lxc_attach(c, lxc_attach_run_command, &command, options, &pid); |
4048 | if (ret < 0) | |
4049 | return ret; | |
a73846d8 | 4050 | |
a0e93eeb CS |
4051 | return lxc_wait_for_pid_status(pid); |
4052 | } | |
4053 | ||
d6430143 CB |
4054 | static int lxcapi_attach_run_wait(struct lxc_container *c, |
4055 | lxc_attach_options_t *options, | |
4056 | const char *program, const char *const argv[]) | |
858377e4 SH |
4057 | { |
4058 | int ret; | |
a73846d8 | 4059 | |
858377e4 SH |
4060 | current_config = c ? c->lxc_conf : NULL; |
4061 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4062 | current_config = NULL; | |
a73846d8 | 4063 | |
858377e4 SH |
4064 | return ret; |
4065 | } | |
4066 | ||
74a3920a | 4067 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 | 4068 | { |
7a99b5a0 | 4069 | __do_free char *fname = NULL; |
f5dd1d53 SH |
4070 | struct stat sb; |
4071 | int i = 0, ret; | |
4072 | ||
f5849fd7 | 4073 | fname = must_realloc(NULL, strlen(lxcpath) + 20); |
a73846d8 | 4074 | |
51a8a74c | 4075 | for (;;) { |
f5dd1d53 | 4076 | sprintf(fname, "%s/snap%d", lxcpath, i); |
a73846d8 | 4077 | |
f5dd1d53 SH |
4078 | ret = stat(fname, &sb); |
4079 | if (ret != 0) | |
4080 | return i; | |
a73846d8 | 4081 | |
f5dd1d53 SH |
4082 | i++; |
4083 | } | |
4084 | } | |
4085 | ||
18aa217b SH |
4086 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4087 | { | |
4088 | int ret; | |
a73846d8 | 4089 | |
18aa217b SH |
4090 | /* |
4091 | * If the old style snapshot path exists, use it | |
4092 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4093 | */ | |
94aeacb7 CB |
4094 | ret = strnprintf(snappath, PATH_MAX, "%ssnaps", c->config_path); |
4095 | if (ret < 0) | |
18aa217b | 4096 | return false; |
a73846d8 | 4097 | |
18aa217b | 4098 | if (dir_exists(snappath)) { |
94aeacb7 CB |
4099 | ret = strnprintf(snappath, PATH_MAX, "%ssnaps/%s", c->config_path, c->name); |
4100 | if (ret < 0) | |
18aa217b | 4101 | return false; |
a73846d8 | 4102 | |
18aa217b SH |
4103 | return true; |
4104 | } | |
4105 | ||
4106 | /* | |
4107 | * Use the new style path | |
4108 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4109 | */ | |
94aeacb7 CB |
4110 | ret = strnprintf(snappath, PATH_MAX, "%s/%s/snaps", c->config_path, c->name); |
4111 | if (ret < 0) | |
18aa217b | 4112 | return false; |
a73846d8 | 4113 | |
18aa217b SH |
4114 | return true; |
4115 | } | |
4116 | ||
858377e4 | 4117 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 | 4118 | { |
f5849fd7 | 4119 | __do_free char *dfnam = NULL; |
1b5d4bd8 | 4120 | int len; |
f5dd1d53 | 4121 | int i, flags, ret; |
df05fa0f | 4122 | time_t timer; |
4123 | struct tm tm_info; | |
f5dd1d53 | 4124 | struct lxc_container *c2; |
8a22c168 | 4125 | char snappath[PATH_MAX], newname[20]; |
df05fa0f | 4126 | char buffer[25]; |
4127 | FILE *f; | |
f5dd1d53 | 4128 | |
840f05df SH |
4129 | if (!c || !lxcapi_is_defined(c)) |
4130 | return -1; | |
4131 | ||
10bc1861 | 4132 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4133 | ERROR("%s's backing store cannot be backed up", c->name); |
4134 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4135 | return -1; |
4136 | } | |
4137 | ||
18aa217b | 4138 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4139 | return -1; |
18aa217b | 4140 | |
f5dd1d53 SH |
4141 | i = get_next_index(snappath, c->name); |
4142 | ||
4143 | if (mkdir_p(snappath, 0755) < 0) { | |
4144 | ERROR("Failed to create snapshot directory %s", snappath); | |
4145 | return -1; | |
4146 | } | |
4147 | ||
94aeacb7 CB |
4148 | ret = strnprintf(newname, 20, "snap%d", i); |
4149 | if (ret < 0) | |
f5dd1d53 SH |
4150 | return -1; |
4151 | ||
0a83cbbb SH |
4152 | /* |
4153 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4154 | * created in the original container | |
4155 | */ | |
4156 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4157 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4158 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4159 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4160 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4161 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4162 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4163 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4164 | } | |
a73846d8 | 4165 | |
858377e4 | 4166 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4167 | if (!c2) { |
df05fa0f | 4168 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4169 | return -1; |
4170 | } | |
4171 | ||
4172 | lxc_container_put(c2); | |
4173 | ||
1a0e70ac | 4174 | /* Now write down the creation time. */ |
f5dd1d53 | 4175 | time(&timer); |
f5dd1d53 | 4176 | |
df05fa0f | 4177 | if (!localtime_r(&timer, &tm_info)) { |
4178 | ERROR("Failed to get localtime"); | |
4179 | return -1; | |
4180 | } | |
4181 | ||
4182 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 | 4183 | |
1b5d4bd8 RK |
4184 | len = strlen(snappath) + 1 + strlen(newname) + 1 + strlen(LXC_TIMESTAMP_FNAME) + 1; |
4185 | dfnam = must_realloc(NULL, len); | |
94aeacb7 CB |
4186 | ret = strnprintf(dfnam, len, "%s/%s/%s", snappath, newname, LXC_TIMESTAMP_FNAME); |
4187 | if (ret < 0) | |
4188 | return -1; | |
4110345b | 4189 | f = fopen(dfnam, "we"); |
f5dd1d53 | 4190 | if (!f) { |
959aee9c | 4191 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4192 | return -1; |
4193 | } | |
a73846d8 | 4194 | |
f5dd1d53 SH |
4195 | if (fprintf(f, "%s", buffer) < 0) { |
4196 | SYSERROR("Writing timestamp"); | |
4197 | fclose(f); | |
4198 | return -1; | |
4199 | } | |
a73846d8 | 4200 | |
025ed0f3 | 4201 | ret = fclose(f); |
025ed0f3 | 4202 | if (ret != 0) { |
f5dd1d53 SH |
4203 | SYSERROR("Writing timestamp"); |
4204 | return -1; | |
4205 | } | |
4206 | ||
4207 | if (commentfile) { | |
7a99b5a0 | 4208 | __do_free char *path = NULL; |
1a0e70ac | 4209 | /* $p / $name / comment \0 */ |
1b5d4bd8 | 4210 | len = strlen(snappath) + 1 + strlen(newname) + 1 + strlen(LXC_COMMENT_FNAME) + 1; |
a73846d8 | 4211 | |
f5849fd7 | 4212 | path = must_realloc(NULL, len); |
94aeacb7 CB |
4213 | ret = strnprintf(path, len, "%s/%s/%s", snappath, newname, LXC_COMMENT_FNAME); |
4214 | if (ret < 0) | |
4215 | return -1; | |
f5dd1d53 SH |
4216 | return copy_file(commentfile, path) < 0 ? -1 : i; |
4217 | } | |
4218 | ||
4219 | return i; | |
4220 | } | |
4221 | ||
858377e4 SH |
4222 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4223 | ||
f5dd1d53 SH |
4224 | static void lxcsnap_free(struct lxc_snapshot *s) |
4225 | { | |
f10fad2f ME |
4226 | free(s->name); |
4227 | free(s->comment_pathname); | |
4228 | free(s->timestamp); | |
4229 | free(s->lxcpath); | |
f5dd1d53 SH |
4230 | } |
4231 | ||
94aeacb7 | 4232 | static char *get_snapcomment_path(char *snappath, char *name) |
f5dd1d53 | 4233 | { |
94aeacb7 | 4234 | __do_free char *s = NULL; |
1a0e70ac | 4235 | /* $snappath/$name/comment */ |
f5dd1d53 | 4236 | int ret, len = strlen(snappath) + strlen(name) + 10; |
f5dd1d53 | 4237 | |
94aeacb7 CB |
4238 | s = malloc(len); |
4239 | if (!s) | |
4240 | return NULL; | |
a73846d8 | 4241 | |
94aeacb7 CB |
4242 | ret = strnprintf(s, len, "%s/%s/comment", snappath, name); |
4243 | if (ret < 0) | |
4244 | return NULL; | |
4245 | ||
4246 | return move_ptr(s); | |
f5dd1d53 SH |
4247 | } |
4248 | ||
4249 | static char *get_timestamp(char* snappath, char *name) | |
4250 | { | |
768e7ba2 CB |
4251 | __do_free char *s = NULL; |
4252 | __do_fclose FILE *fin = NULL; | |
4253 | char path[PATH_MAX]; | |
f5dd1d53 | 4254 | int ret, len; |
f5dd1d53 | 4255 | |
94aeacb7 CB |
4256 | ret = strnprintf(path, sizeof(path), "%s/%s/ts", snappath, name); |
4257 | if (ret < 0) | |
f5dd1d53 | 4258 | return NULL; |
a73846d8 | 4259 | |
4110345b | 4260 | fin = fopen(path, "re"); |
025ed0f3 | 4261 | if (!fin) |
f5dd1d53 | 4262 | return NULL; |
a73846d8 | 4263 | |
f5dd1d53 SH |
4264 | (void) fseek(fin, 0, SEEK_END); |
4265 | len = ftell(fin); | |
4266 | (void) fseek(fin, 0, SEEK_SET); | |
4267 | if (len > 0) { | |
4268 | s = malloc(len+1); | |
4269 | if (s) { | |
652a1f4b CB |
4270 | ssize_t nbytes; |
4271 | ||
f5dd1d53 | 4272 | s[len] = '\0'; |
652a1f4b CB |
4273 | nbytes = fread(s, 1, len, fin); |
4274 | if (nbytes < 0 || nbytes != (ssize_t)len) | |
768e7ba2 | 4275 | return log_error_errno(NULL, errno, "reading timestamp"); |
f5dd1d53 SH |
4276 | } |
4277 | } | |
a73846d8 | 4278 | |
768e7ba2 | 4279 | return move_ptr(s); |
f5dd1d53 SH |
4280 | } |
4281 | ||
858377e4 | 4282 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 | 4283 | { |
4110345b | 4284 | __do_closedir DIR *dir = NULL; |
8a22c168 | 4285 | char snappath[PATH_MAX], path2[PATH_MAX]; |
18aa217b | 4286 | int count = 0, ret; |
74f96976 | 4287 | struct dirent *direntp; |
f5dd1d53 | 4288 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
f5dd1d53 SH |
4289 | |
4290 | if (!c || !lxcapi_is_defined(c)) | |
4291 | return -1; | |
c868b261 | 4292 | |
18aa217b | 4293 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4294 | ERROR("path name too long"); |
4295 | return -1; | |
4296 | } | |
a73846d8 | 4297 | |
025ed0f3 | 4298 | dir = opendir(snappath); |
025ed0f3 | 4299 | if (!dir) { |
a73846d8 | 4300 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4301 | return 0; |
4302 | } | |
4303 | ||
74f96976 | 4304 | while ((direntp = readdir(dir))) { |
62dcc033 | 4305 | if (strequal(direntp->d_name, ".")) |
f5dd1d53 SH |
4306 | continue; |
4307 | ||
62dcc033 | 4308 | if (strequal(direntp->d_name, "..")) |
f5dd1d53 SH |
4309 | continue; |
4310 | ||
94aeacb7 CB |
4311 | ret = strnprintf(path2, sizeof(path2), "%s/%s/%s", snappath, direntp->d_name, LXC_CONFIG_FNAME); |
4312 | if (ret < 0) { | |
f5dd1d53 SH |
4313 | ERROR("pathname too long"); |
4314 | goto out_free; | |
4315 | } | |
a73846d8 | 4316 | |
f5dd1d53 SH |
4317 | if (!file_exists(path2)) |
4318 | continue; | |
a73846d8 | 4319 | |
f5dd1d53 SH |
4320 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4321 | if (!nsnaps) { | |
4322 | SYSERROR("Out of memory"); | |
4323 | goto out_free; | |
4324 | } | |
a73846d8 | 4325 | |
f5dd1d53 SH |
4326 | snaps = nsnaps; |
4327 | snaps[count].free = lxcsnap_free; | |
4328 | snaps[count].name = strdup(direntp->d_name); | |
4329 | if (!snaps[count].name) | |
4330 | goto out_free; | |
a73846d8 | 4331 | |
f5dd1d53 SH |
4332 | snaps[count].lxcpath = strdup(snappath); |
4333 | if (!snaps[count].lxcpath) { | |
4334 | free(snaps[count].name); | |
4335 | goto out_free; | |
4336 | } | |
a73846d8 | 4337 | |
f5dd1d53 SH |
4338 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4339 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4340 | count++; | |
4341 | } | |
4342 | ||
f5dd1d53 SH |
4343 | *ret_snaps = snaps; |
4344 | return count; | |
4345 | ||
4346 | out_free: | |
4347 | if (snaps) { | |
4110345b | 4348 | for (int i = 0; i < count; i++) |
f5dd1d53 | 4349 | lxcsnap_free(&snaps[i]); |
a73846d8 | 4350 | |
f5dd1d53 SH |
4351 | free(snaps); |
4352 | } | |
a73846d8 | 4353 | |
f5dd1d53 SH |
4354 | return -1; |
4355 | } | |
4356 | ||
858377e4 SH |
4357 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4358 | ||
4359 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 | 4360 | { |
8a22c168 | 4361 | char clonelxcpath[PATH_MAX]; |
18aa217b | 4362 | int flags = 0; |
f5dd1d53 | 4363 | struct lxc_container *snap, *rest; |
10bc1861 | 4364 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4365 | bool b = false; |
4366 | ||
4367 | if (!c || !c->name || !c->config_path) | |
4368 | return false; | |
4369 | ||
18aa217b SH |
4370 | if (has_fs_snapshots(c)) { |
4371 | ERROR("container rootfs has dependent snapshots"); | |
4372 | return false; | |
4373 | } | |
4374 | ||
4e86cad3 | 4375 | if (lxc_storage_prepare(c->lxc_conf)) { |
f5dd1d53 SH |
4376 | ERROR("Failed to find original backing store type"); |
4377 | return false; | |
4378 | } | |
4e86cad3 | 4379 | bdev = c->lxc_conf->rootfs.storage; |
f5dd1d53 | 4380 | |
17a367d8 CB |
4381 | /* For an overlay container the rootfs is considered immutable |
4382 | * and cannot be removed when restoring from a snapshot. We pass this | |
4383 | * internal flag along to communicate this to various parts of the | |
4384 | * codebase. | |
4385 | */ | |
62dcc033 | 4386 | if (strequal(bdev->type, "overlay") || strequal(bdev->type, "overlayfs")) |
17a367d8 CB |
4387 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; |
4388 | ||
f5dd1d53 SH |
4389 | if (!newname) |
4390 | newname = c->name; | |
7e36f87e | 4391 | |
18aa217b | 4392 | if (!get_snappath_dir(c, clonelxcpath)) { |
4e86cad3 | 4393 | lxc_storage_put(c->lxc_conf); |
f5dd1d53 SH |
4394 | return false; |
4395 | } | |
1a0e70ac | 4396 | /* how should we lock this? */ |
f5dd1d53 SH |
4397 | |
4398 | snap = lxc_container_new(snapname, clonelxcpath); | |
4399 | if (!snap || !lxcapi_is_defined(snap)) { | |
4400 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4401 | |
17a367d8 CB |
4402 | if (snap) |
4403 | lxc_container_put(snap); | |
a73846d8 | 4404 | |
4e86cad3 | 4405 | lxc_storage_put(c->lxc_conf); |
f5dd1d53 SH |
4406 | return false; |
4407 | } | |
4408 | ||
62dcc033 | 4409 | if (strequal(c->name, newname)) { |
17a367d8 | 4410 | if (!container_destroy(c, bdev)) { |
7e36f87e ÇO |
4411 | ERROR("Could not destroy existing container %s", newname); |
4412 | lxc_container_put(snap); | |
4e86cad3 | 4413 | lxc_storage_put(c->lxc_conf); |
7e36f87e ÇO |
4414 | return false; |
4415 | } | |
4416 | } | |
4417 | ||
62dcc033 | 4418 | if (!strequal(bdev->type, "dir") && !strequal(bdev->type, "loop")) |
de269ee8 | 4419 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
17a367d8 | 4420 | |
62dcc033 | 4421 | if (strequal(bdev->type, "overlay") || strequal(bdev->type, "overlayfs")) |
17a367d8 | 4422 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; |
a73846d8 | 4423 | |
09f6f8c4 CB |
4424 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4425 | NULL, 0, NULL); | |
4e86cad3 | 4426 | lxc_storage_put(c->lxc_conf); |
f5dd1d53 SH |
4427 | if (rest && lxcapi_is_defined(rest)) |
4428 | b = true; | |
a73846d8 | 4429 | |
f5dd1d53 SH |
4430 | if (rest) |
4431 | lxc_container_put(rest); | |
17a367d8 | 4432 | |
f5dd1d53 SH |
4433 | lxc_container_put(snap); |
4434 | return b; | |
4435 | } | |
4436 | ||
858377e4 SH |
4437 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4438 | ||
18aa217b | 4439 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4440 | { |
771d96b3 | 4441 | struct lxc_container *snap = NULL; |
18aa217b | 4442 | bool bret = false; |
771d96b3 ÇO |
4443 | |
4444 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4445 | if (!snap) { |
771d96b3 ÇO |
4446 | ERROR("Could not find snapshot %s", snapname); |
4447 | goto err; | |
4448 | } | |
4449 | ||
858377e4 | 4450 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4451 | ERROR("Could not destroy snapshot %s", snapname); |
4452 | goto err; | |
4453 | } | |
a73846d8 | 4454 | |
18aa217b | 4455 | bret = true; |
771d96b3 | 4456 | |
771d96b3 ÇO |
4457 | err: |
4458 | if (snap) | |
4459 | lxc_container_put(snap); | |
a73846d8 | 4460 | |
18aa217b SH |
4461 | return bret; |
4462 | } | |
4463 | ||
4464 | static bool remove_all_snapshots(const char *path) | |
4465 | { | |
4110345b | 4466 | __do_closedir DIR *dir = NULL; |
74f96976 | 4467 | struct dirent *direntp; |
18aa217b SH |
4468 | bool bret = true; |
4469 | ||
4470 | dir = opendir(path); | |
4471 | if (!dir) { | |
4472 | SYSERROR("opendir on snapshot path %s", path); | |
4473 | return false; | |
4474 | } | |
a73846d8 | 4475 | |
74f96976 | 4476 | while ((direntp = readdir(dir))) { |
62dcc033 | 4477 | if (strequal(direntp->d_name, ".")) |
18aa217b | 4478 | continue; |
a73846d8 | 4479 | |
62dcc033 | 4480 | if (strequal(direntp->d_name, "..")) |
18aa217b | 4481 | continue; |
a73846d8 | 4482 | |
18aa217b SH |
4483 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4484 | bret = false; | |
4485 | continue; | |
4486 | } | |
4487 | } | |
4488 | ||
18aa217b SH |
4489 | if (rmdir(path)) |
4490 | SYSERROR("Error removing directory %s", path); | |
4491 | ||
4492 | return bret; | |
4493 | } | |
4494 | ||
858377e4 | 4495 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b | 4496 | { |
8a22c168 | 4497 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4498 | |
4499 | if (!c || !c->name || !c->config_path || !snapname) | |
4500 | return false; | |
4501 | ||
4502 | if (!get_snappath_dir(c, clonelxcpath)) | |
4503 | return false; | |
4504 | ||
4505 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4506 | } | |
4507 | ||
858377e4 SH |
4508 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4509 | ||
4510 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b | 4511 | { |
8a22c168 | 4512 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4513 | |
4514 | if (!c || !c->name || !c->config_path) | |
4515 | return false; | |
4516 | ||
4517 | if (!get_snappath_dir(c, clonelxcpath)) | |
4518 | return false; | |
4519 | ||
4520 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4521 | } |
4522 | ||
858377e4 SH |
4523 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4524 | ||
4525 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4526 | { |
5106ecd0 | 4527 | if (!c) |
4528 | return false; | |
4529 | ||
b494d2dd SH |
4530 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4531 | } | |
4532 | ||
858377e4 SH |
4533 | WRAP_API(bool, lxcapi_may_control) |
4534 | ||
d5aa23e6 | 4535 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4536 | struct stat *st) |
d5aa23e6 | 4537 | { |
b69dfc9f CB |
4538 | int ret; |
4539 | char *tmp; | |
4540 | pid_t pid; | |
8a22c168 | 4541 | char chrootpath[PATH_MAX]; |
d5aa23e6 | 4542 | char *directory_path = NULL; |
d5aa23e6 | 4543 | |
b69dfc9f CB |
4544 | pid = fork(); |
4545 | if (pid < 0) { | |
4546 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4547 | return false; |
4548 | } | |
b69dfc9f | 4549 | |
d5aa23e6 | 4550 | if (pid) { |
b69dfc9f CB |
4551 | ret = wait_for_pid(pid); |
4552 | if (ret != 0) { | |
4553 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4554 | return false; |
4555 | } | |
b69dfc9f | 4556 | |
d5aa23e6 SH |
4557 | return true; |
4558 | } | |
4559 | ||
4560 | /* prepare the path */ | |
94aeacb7 CB |
4561 | ret = strnprintf(chrootpath, sizeof(chrootpath), "/proc/%d/root", init_pid); |
4562 | if (ret < 0) | |
d5aa23e6 SH |
4563 | return false; |
4564 | ||
b69dfc9f CB |
4565 | ret = chroot(chrootpath); |
4566 | if (ret < 0) | |
a7764ce7 | 4567 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4568 | |
4569 | ret = chdir("/"); | |
4570 | if (ret < 0) | |
a7764ce7 | 4571 | _exit(EXIT_FAILURE); |
b69dfc9f | 4572 | |
d5aa23e6 | 4573 | /* remove path if it exists */ |
b69dfc9f CB |
4574 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4575 | if(ret == 0) { | |
4576 | ret = unlink(path); | |
c7d76c09 | 4577 | if (ret < 0) { |
6d1400b5 | 4578 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4579 | _exit(EXIT_FAILURE); |
c7d76c09 | 4580 | } |
d5aa23e6 | 4581 | } |
b69dfc9f | 4582 | |
d5aa23e6 | 4583 | if (!add) |
a7764ce7 | 4584 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4585 | |
4586 | /* create any missing directories */ | |
b69dfc9f CB |
4587 | tmp = strdup(path); |
4588 | if (!tmp) | |
a7764ce7 | 4589 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4590 | |
4591 | directory_path = dirname(tmp); | |
4592 | ret = mkdir_p(directory_path, 0755); | |
4593 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4594 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4595 | free(tmp); |
a7764ce7 | 4596 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4597 | } |
4598 | ||
4599 | /* create the device node */ | |
b69dfc9f CB |
4600 | ret = mknod(path, st->st_mode, st->st_rdev); |
4601 | free(tmp); | |
c7d76c09 | 4602 | if (ret < 0) { |
6d1400b5 | 4603 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4604 | _exit(EXIT_FAILURE); |
c7d76c09 | 4605 | } |
d5aa23e6 | 4606 | |
a7764ce7 | 4607 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4608 | } |
4609 | ||
f0ca2726 | 4610 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4611 | { |
4612 | int ret; | |
4613 | struct stat st; | |
238b3e5e | 4614 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4615 | const char *p; |
caab004f | 4616 | pid_t init_pid; |
a9a0ed90 ÇO |
4617 | |
4618 | /* make sure container is running */ | |
858377e4 | 4619 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4620 | ERROR("container is not running"); |
d5aa23e6 | 4621 | return false; |
a9a0ed90 ÇO |
4622 | } |
4623 | ||
4624 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4625 | p = dest_path ? dest_path : src_path; | |
4626 | ||
a9a0ed90 ÇO |
4627 | /* make sure we can access p */ |
4628 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4629 | return false; |
a9a0ed90 ÇO |
4630 | |
4631 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4632 | if (S_ISCHR(st.st_mode)) |
94aeacb7 | 4633 | ret = strnprintf(value, sizeof(value), "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4634 | else if (S_ISBLK(st.st_mode)) |
94aeacb7 | 4635 | ret = strnprintf(value, sizeof(value), "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4636 | else |
d5aa23e6 | 4637 | return false; |
94aeacb7 | 4638 | if (ret < 0) |
d5aa23e6 | 4639 | return false; |
a9a0ed90 | 4640 | |
caab004f TA |
4641 | init_pid = do_lxcapi_init_pid(c); |
4642 | if (init_pid < 0) { | |
4643 | ERROR("Failed to get init pid"); | |
4644 | return false; | |
4645 | } | |
4646 | ||
4647 | if (!do_add_remove_node(init_pid, p, add, &st)) | |
d5aa23e6 | 4648 | return false; |
a9a0ed90 | 4649 | |
d5aa23e6 | 4650 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4651 | if (add) { |
858377e4 | 4652 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4653 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4654 | return false; |
a9a0ed90 ÇO |
4655 | } |
4656 | } else { | |
858377e4 | 4657 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4658 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4659 | return false; |
a9a0ed90 ÇO |
4660 | } |
4661 | } | |
d5aa23e6 | 4662 | |
a9a0ed90 | 4663 | return true; |
a9a0ed90 ÇO |
4664 | } |
4665 | ||
858377e4 | 4666 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4667 | { |
e0010464 | 4668 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4669 | if (am_host_unpriv()) { |
238b3e5e | 4670 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4671 | return false; |
4672 | } | |
a73846d8 | 4673 | |
a9a0ed90 ÇO |
4674 | return add_remove_device_node(c, src_path, dest_path, true); |
4675 | } | |
4676 | ||
858377e4 SH |
4677 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4678 | ||
4679 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4680 | { |
e0010464 | 4681 | if (am_guest_unpriv()) { |
238b3e5e | 4682 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4683 | return false; |
4684 | } | |
a73846d8 | 4685 | |
a9a0ed90 ÇO |
4686 | return add_remove_device_node(c, src_path, dest_path, false); |
4687 | } | |
4688 | ||
858377e4 SH |
4689 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4690 | ||
c7d76c09 CB |
4691 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4692 | const char *ifname, | |
4693 | const char *dst_ifname) | |
e58fae8f | 4694 | { |
c7d76c09 | 4695 | pid_t init_pid; |
e58fae8f | 4696 | int ret = 0; |
c7d76c09 | 4697 | |
e0010464 | 4698 | if (am_guest_unpriv()) { |
238b3e5e | 4699 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4700 | return false; |
4701 | } | |
4702 | ||
4703 | if (!ifname) { | |
4704 | ERROR("No source interface name given"); | |
4705 | return false; | |
4706 | } | |
4707 | ||
4708 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4709 | if (ret > 0) { |
4710 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4711 | ret = lxc_netdev_down(ifname); |
4712 | if (ret) | |
4713 | goto err; | |
4714 | } | |
4715 | ||
c7d76c09 | 4716 | init_pid = do_lxcapi_init_pid(c); |
caab004f TA |
4717 | if (init_pid < 0) { |
4718 | ERROR("Failed to get init pid"); | |
4719 | goto err; | |
4720 | } | |
4721 | ||
c7d76c09 | 4722 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); |
e58fae8f DY |
4723 | if (ret) |
4724 | goto err; | |
4725 | ||
c7d76c09 | 4726 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4727 | return true; |
e5848d39 | 4728 | |
e58fae8f | 4729 | err: |
e58fae8f DY |
4730 | return false; |
4731 | } | |
4732 | ||
858377e4 SH |
4733 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4734 | ||
c7d76c09 CB |
4735 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4736 | const char *ifname, | |
4737 | const char *dst_ifname) | |
e58fae8f | 4738 | { |
c7d76c09 | 4739 | int ret; |
e58fae8f | 4740 | pid_t pid, pid_outside; |
e4103cf6 | 4741 | __do_free char *physname = NULL; |
e58fae8f | 4742 | |
e0010464 SH |
4743 | /* |
4744 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4745 | * But for other types guest privilege suffices. | |
4746 | */ | |
4747 | if (am_guest_unpriv()) { | |
238b3e5e | 4748 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4749 | return false; |
4750 | } | |
4751 | ||
4752 | if (!ifname) { | |
4753 | ERROR("No source interface name given"); | |
4754 | return false; | |
4755 | } | |
4756 | ||
0059379f | 4757 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4758 | pid = fork(); |
4759 | if (pid < 0) { | |
c7d76c09 | 4760 | ERROR("Failed to fork"); |
e58fae8f DY |
4761 | return false; |
4762 | } | |
4763 | ||
1a0e70ac | 4764 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4765 | pid_t init_pid; |
4766 | ||
4767 | init_pid = do_lxcapi_init_pid(c); | |
caab004f TA |
4768 | if (init_pid < 0) { |
4769 | ERROR("Failed to get init pid"); | |
4770 | _exit(EXIT_FAILURE); | |
4771 | } | |
acbfeda8 CB |
4772 | if (!switch_to_ns(init_pid, "net")) { |
4773 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4774 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4775 | } |
4776 | ||
e4103cf6 TP |
4777 | /* create new mount namespace for use with remounting /sys and is_wlan() below. */ |
4778 | ret = unshare(CLONE_NEWNS); | |
4779 | if (ret < 0) { | |
4780 | ERROR("Failed to unshare mount namespace"); | |
4781 | _exit(EXIT_FAILURE); | |
4782 | } | |
4783 | ||
4784 | /* set / recursively as private so that mount propagation doesn't affect us. */ | |
4785 | if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0) < 0) { | |
4786 | ERROR("Failed to recursively set / as private in mount namespace"); | |
4787 | _exit(EXIT_FAILURE); | |
4788 | } | |
4789 | ||
e58fae8f | 4790 | ret = lxc_netdev_isup(ifname); |
c7d76c09 CB |
4791 | if (ret < 0) { |
4792 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4793 | _exit(EXIT_FAILURE); |
c7d76c09 | 4794 | } |
e58fae8f DY |
4795 | |
4796 | /* netdev of ifname is up. */ | |
4797 | if (ret) { | |
4798 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4799 | if (ret) { |
4800 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4801 | _exit(EXIT_FAILURE); |
c7d76c09 | 4802 | } |
e58fae8f DY |
4803 | } |
4804 | ||
e4103cf6 TP |
4805 | /* remount /sys so is_wlan() can check if this device is a wlan device. */ |
4806 | lxc_attach_remount_sys_proc(); | |
4807 | physname = is_wlan(ifname); | |
4808 | if (physname) | |
4809 | ret = lxc_netdev_move_wlan(physname, ifname, pid_outside, dst_ifname); | |
4810 | else | |
4811 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
4812 | ||
c7d76c09 CB |
4813 | /* -EINVAL means there is no netdev named as ifname. */ |
4814 | if (ret < 0) { | |
4815 | if (ret == -EINVAL) | |
4816 | ERROR("Network device \"%s\" not found", ifname); | |
4817 | else | |
4818 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4819 | |
8d7b6c25 | 4820 | _exit(EXIT_FAILURE); |
e58fae8f | 4821 | } |
c7d76c09 | 4822 | |
8d7b6c25 | 4823 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4824 | } |
4825 | ||
c7d76c09 CB |
4826 | ret = wait_for_pid(pid); |
4827 | if (ret != 0) | |
e58fae8f DY |
4828 | return false; |
4829 | ||
c7d76c09 | 4830 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4831 | return true; |
4832 | } | |
4833 | ||
858377e4 SH |
4834 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4835 | ||
aef3d51e TA |
4836 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4837 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4838 | { |
6b9be523 | 4839 | int ret = -1; |
2cb80427 | 4840 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4841 | uint64_t features_to_check = 0; |
85c50991 | 4842 | |
aef3d51e TA |
4843 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4844 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4845 | * to do anything special. | |
4846 | */ | |
4847 | if (size > sizeof(*opts)) { | |
4848 | unsigned char *addr; | |
4849 | unsigned char *end; | |
4850 | ||
4851 | addr = (void *)opts + sizeof(*opts); | |
4852 | end = (void *)opts + size; | |
a73846d8 | 4853 | |
4854 | for (; addr < end; addr++) | |
4855 | if (*addr) | |
aef3d51e | 4856 | return -E2BIG; |
85c50991 TA |
4857 | } |
4858 | ||
2cb80427 TA |
4859 | /* If the caller has a smaller struct, let's zero out the end for them |
4860 | * so we don't accidentally use bits of it that they didn't know about | |
4861 | * to initialize. | |
4862 | */ | |
4863 | if (size < sizeof(*opts)) { | |
4864 | valid_opts = malloc(sizeof(*opts)); | |
4865 | if (!valid_opts) | |
4866 | return -ENOMEM; | |
4867 | ||
4868 | memset(valid_opts, 0, sizeof(*opts)); | |
4869 | memcpy(valid_opts, opts, size); | |
4870 | } | |
4871 | ||
aef3d51e TA |
4872 | switch (cmd) { |
4873 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4874 | if (!do_lxcapi_is_running(c)) { |
4875 | ERROR("container is not running"); | |
6b9be523 | 4876 | goto on_error; |
7ad13c91 | 4877 | } |
a73846d8 | 4878 | |
2cb80427 | 4879 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4880 | break; |
4881 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4882 | if (!do_lxcapi_is_running(c)) { |
4883 | ERROR("container is not running"); | |
6b9be523 | 4884 | goto on_error; |
7ad13c91 | 4885 | } |
a73846d8 | 4886 | |
2cb80427 | 4887 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4888 | break; |
4889 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4890 | if (do_lxcapi_is_running(c)) { |
4891 | ERROR("container is already running"); | |
6b9be523 | 4892 | goto on_error; |
7ad13c91 | 4893 | } |
a73846d8 | 4894 | |
2cb80427 | 4895 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4896 | break; |
b5b12b9e AR |
4897 | case MIGRATE_FEATURE_CHECK: |
4898 | features_to_check = valid_opts->features_to_check; | |
4899 | ret = !__criu_check_feature(&features_to_check); | |
4900 | if (ret) { | |
4901 | /* Something went wrong. Let's let the caller | |
4902 | * know which feature checks failed. */ | |
4903 | valid_opts->features_to_check = features_to_check; | |
4904 | } | |
4905 | break; | |
aef3d51e TA |
4906 | default: |
4907 | ERROR("invalid migrate command %u", cmd); | |
4908 | ret = -EINVAL; | |
4909 | } | |
735f2c6e | 4910 | |
6b9be523 | 4911 | on_error: |
f686506d TA |
4912 | if (size < sizeof(*opts)) |
4913 | free(valid_opts); | |
4914 | ||
aef3d51e TA |
4915 | return ret; |
4916 | } | |
735f2c6e | 4917 | |
aef3d51e | 4918 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4919 | |
aef3d51e TA |
4920 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4921 | { | |
ebb088e1 AR |
4922 | struct migrate_opts opts; |
4923 | ||
4924 | memset(&opts, 0, sizeof(opts)); | |
4925 | ||
4926 | opts.directory = directory; | |
4927 | opts.stop = stop; | |
4928 | opts.verbose = verbose; | |
735f2c6e | 4929 | |
aef3d51e | 4930 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4931 | } |
4932 | ||
858377e4 SH |
4933 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4934 | ||
4935 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4936 | { |
ebb088e1 AR |
4937 | struct migrate_opts opts; |
4938 | ||
4939 | memset(&opts, 0, sizeof(opts)); | |
4940 | ||
4941 | opts.directory = directory; | |
4942 | opts.verbose = verbose; | |
c9d8f2ee | 4943 | |
aef3d51e | 4944 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4945 | } |
4946 | ||
858377e4 SH |
4947 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4948 | ||
1f5a90f9 CB |
4949 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4950 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4951 | { | |
4952 | char *dirdup, *destdirname; | |
4953 | int ret; | |
4954 | ||
4955 | dirdup = strdup(dest); | |
4956 | if (!dirdup) { | |
4957 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4958 | return -1; | |
4959 | } | |
4960 | destdirname = dirname(dirdup); | |
4961 | ||
4962 | ret = mkdir_p(destdirname, 0755); | |
4963 | if (ret < 0) { | |
4964 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4965 | free(dirdup); | |
4966 | return ret; | |
4967 | } | |
4968 | free(dirdup); | |
4969 | ||
4970 | (void)remove(dest); | |
4971 | ||
4972 | if (S_ISDIR(st_mode)) | |
4973 | ret = mkdir(dest, 0000); | |
4974 | else | |
4975 | ret = mknod(dest, S_IFREG | 0000, 0); | |
71521317 SG |
4976 | |
4977 | if (ret == 0) | |
4978 | TRACE("Created mount target \"%s\"", dest); | |
d8bc14a7 | 4979 | else if (ret < 0 && errno != EEXIST) { |
1f5a90f9 CB |
4980 | SYSERROR("Failed to create mount target \"%s\"", dest); |
4981 | return -1; | |
4982 | } | |
4983 | ||
4984 | return 0; | |
4985 | } | |
4986 | ||
3340f441 CB |
4987 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
4988 | const char *target, const char *filesystemtype, | |
4989 | unsigned long mountflags, const void *data, | |
4990 | struct lxc_mount *mnt) | |
4991 | { | |
29df56cd | 4992 | char *suff, *sret; |
8a22c168 | 4993 | char template[PATH_MAX], path[PATH_MAX]; |
29df56cd | 4994 | pid_t pid, init_pid; |
c6885c3f | 4995 | struct stat sb; |
ecce75a6 | 4996 | bool is_dir; |
29df56cd LT |
4997 | int ret = -1, fd = -EBADF; |
4998 | ||
4999 | if (!c || !c->lxc_conf) { | |
5000 | ERROR("Container or configuration is NULL"); | |
5001 | return -EINVAL; | |
5002 | } | |
5003 | ||
7a41e857 | 5004 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
5005 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
5006 | return -EINVAL; | |
5007 | } | |
29df56cd | 5008 | |
94aeacb7 CB |
5009 | ret = strnprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
5010 | if (ret < 0) { | |
29df56cd LT |
5011 | SYSERROR("Error writing shmounts tempdir name"); |
5012 | goto out; | |
5013 | } | |
5014 | ||
c6885c3f | 5015 | /* Create a temporary file / dir under the shared mountpoint */ |
62dcc033 | 5016 | if (!source || strequal(source, "")) { |
c6885c3f LT |
5017 | /* If source is not specified, maybe we want to mount a filesystem? */ |
5018 | sb.st_mode = S_IFDIR; | |
5019 | } else { | |
5020 | ret = stat(source, &sb); | |
5021 | if (ret < 0) { | |
5022 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5023 | goto out; | |
5024 | } | |
5025 | } | |
5026 | ||
ecce75a6 CB |
5027 | is_dir = (S_ISDIR(sb.st_mode) != 0); |
5028 | if (is_dir) { | |
c6885c3f LT |
5029 | sret = mkdtemp(template); |
5030 | if (!sret) { | |
5031 | SYSERROR("Could not create shmounts temporary dir"); | |
5032 | goto out; | |
5033 | } | |
c6885c3f LT |
5034 | } else { |
5035 | fd = lxc_make_tmpfile(template, false); | |
5036 | if (fd < 0) { | |
5037 | SYSERROR("Could not create shmounts temporary file"); | |
5038 | goto out; | |
5039 | } | |
29df56cd LT |
5040 | } |
5041 | ||
5042 | /* Do the fork */ | |
5043 | pid = fork(); | |
5044 | if (pid < 0) { | |
5045 | SYSERROR("Could not fork"); | |
5046 | goto out; | |
5047 | } | |
5048 | ||
5049 | if (pid == 0) { | |
5050 | /* Do the mount */ | |
5051 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5052 | if (ret < 0) { | |
c6885c3f | 5053 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5054 | _exit(EXIT_FAILURE); |
5055 | } | |
3340f441 | 5056 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5057 | |
5058 | init_pid = do_lxcapi_init_pid(c); | |
5059 | if (init_pid < 0) { | |
5060 | ERROR("Failed to obtain container's init pid"); | |
5061 | _exit(EXIT_FAILURE); | |
5062 | } | |
5063 | ||
5064 | /* Enter the container namespaces */ | |
0589d744 | 5065 | if (!list_empty(&c->lxc_conf->id_map)) { |
4e5a9657 | 5066 | if (!switch_to_ns(init_pid, "user")) { |
29df56cd LT |
5067 | ERROR("Failed to enter user namespace"); |
5068 | _exit(EXIT_FAILURE); | |
5069 | } | |
4e5a9657 CB |
5070 | |
5071 | if (!lxc_switch_uid_gid(0, 0)) | |
5072 | _exit(EXIT_FAILURE); | |
29df56cd | 5073 | } |
3340f441 | 5074 | |
29df56cd LT |
5075 | if (!switch_to_ns(init_pid, "mnt")) { |
5076 | ERROR("Failed to enter mount namespace"); | |
5077 | _exit(EXIT_FAILURE); | |
5078 | } | |
5079 | ||
71521317 SG |
5080 | ret = create_mount_target(target, sb.st_mode); |
5081 | if (ret < 0) | |
5082 | _exit(EXIT_FAILURE); | |
c6885c3f | 5083 | |
29df56cd LT |
5084 | suff = strrchr(template, '/'); |
5085 | if (!suff) | |
1f77c35e | 5086 | goto cleanup_target_in_child; |
29df56cd | 5087 | |
94aeacb7 CB |
5088 | ret = strnprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5089 | if (ret < 0) { | |
29df56cd | 5090 | SYSERROR("Error writing container mountpoint name"); |
1f77c35e | 5091 | goto cleanup_target_in_child; |
29df56cd LT |
5092 | } |
5093 | ||
3340f441 | 5094 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5095 | if (ret < 0) { |
5096 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
1f77c35e | 5097 | goto cleanup_target_in_child; |
29df56cd | 5098 | } |
3340f441 | 5099 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5100 | |
5101 | _exit(EXIT_SUCCESS); | |
1f77c35e CB |
5102 | |
5103 | cleanup_target_in_child: | |
5104 | (void)remove(target); | |
5105 | _exit(EXIT_FAILURE); | |
29df56cd LT |
5106 | } |
5107 | ||
5108 | ret = wait_for_pid(pid); | |
1f77c35e CB |
5109 | if (ret < 0) |
5110 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5111 | else | |
5112 | ret = 0; | |
29df56cd | 5113 | |
1f77c35e CB |
5114 | if (umount2(template, MNT_DETACH)) |
5115 | SYSWARN("Failed to remove temporary mount \"%s\"", template); | |
29df56cd | 5116 | |
ecce75a6 CB |
5117 | if (is_dir) |
5118 | (void)rmdir(template); | |
5119 | else | |
5120 | (void)unlink(template); | |
29df56cd LT |
5121 | |
5122 | out: | |
5123 | if (fd >= 0) | |
5124 | close(fd); | |
3340f441 | 5125 | |
29df56cd LT |
5126 | return ret; |
5127 | } | |
5128 | ||
5129 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5130 | unsigned long, const void *, struct lxc_mount *) |
5131 | ||
5132 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5133 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5134 | { |
5135 | pid_t pid, init_pid; | |
5136 | int ret = -1; | |
5137 | ||
5138 | if (!c || !c->lxc_conf) { | |
5139 | ERROR("Container or configuration is NULL"); | |
5140 | return -EINVAL; | |
5141 | } | |
5142 | ||
5143 | /* Do the fork */ | |
5144 | pid = fork(); | |
5145 | if (pid < 0) { | |
5146 | SYSERROR("Could not fork"); | |
5147 | return -1; | |
5148 | } | |
5149 | ||
5150 | if (pid == 0) { | |
5151 | init_pid = do_lxcapi_init_pid(c); | |
5152 | if (init_pid < 0) { | |
5153 | ERROR("Failed to obtain container's init pid"); | |
5154 | _exit(EXIT_FAILURE); | |
5155 | } | |
5156 | ||
5157 | /* Enter the container namespaces */ | |
0589d744 | 5158 | if (!list_empty(&c->lxc_conf->id_map)) { |
d83da817 LT |
5159 | if (!switch_to_ns(init_pid, "user")) { |
5160 | ERROR("Failed to enter user namespace"); | |
5161 | _exit(EXIT_FAILURE); | |
5162 | } | |
5163 | } | |
5164 | ||
5165 | if (!switch_to_ns(init_pid, "mnt")) { | |
5166 | ERROR("Failed to enter mount namespace"); | |
5167 | _exit(EXIT_FAILURE); | |
5168 | } | |
5169 | ||
5170 | /* Do the unmount */ | |
7a41e857 | 5171 | ret = umount2(target, flags); |
d83da817 LT |
5172 | if (ret < 0) { |
5173 | SYSERROR("Failed to umount \"%s\"", target); | |
5174 | _exit(EXIT_FAILURE); | |
5175 | } | |
5176 | ||
5177 | _exit(EXIT_SUCCESS); | |
5178 | } | |
5179 | ||
5180 | ret = wait_for_pid(pid); | |
5181 | if (ret < 0) { | |
5182 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5183 | return -ret; | |
5184 | } | |
5185 | ||
5186 | return 0; | |
5187 | } | |
5188 | ||
5189 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5190 | |
a0e93eeb CS |
5191 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5192 | { | |
5193 | va_list ap; | |
5194 | const char **argv; | |
5195 | int ret; | |
5196 | ||
5197 | if (!c) | |
5198 | return -1; | |
5199 | ||
858377e4 SH |
5200 | current_config = c->lxc_conf; |
5201 | ||
a0e93eeb CS |
5202 | va_start(ap, arg); |
5203 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5204 | va_end(ap); | |
5205 | ||
5206 | if (!argv) { | |
5207 | ERROR("Memory allocation error."); | |
858377e4 SH |
5208 | ret = -1; |
5209 | goto out; | |
a0e93eeb CS |
5210 | } |
5211 | argv[0] = arg; | |
5212 | ||
858377e4 | 5213 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5214 | free((void*)argv); |
a73846d8 | 5215 | |
858377e4 SH |
5216 | out: |
5217 | current_config = NULL; | |
a0e93eeb CS |
5218 | return ret; |
5219 | } | |
5220 | ||
679289bf | 5221 | static int do_lxcapi_seccomp_notify_fd(struct lxc_container *c) |
cdb2a47f | 5222 | { |
cdb2a47f | 5223 | if (!c || !c->lxc_conf) |
b18f6aac | 5224 | return ret_set_errno(-1, -EINVAL); |
cdb2a47f | 5225 | |
679289bf | 5226 | return lxc_seccomp_get_notify_fd(&c->lxc_conf->seccomp); |
cdb2a47f CB |
5227 | } |
5228 | ||
679289bf | 5229 | WRAP_API(int, lxcapi_seccomp_notify_fd) |
cdb2a47f | 5230 | |
21405769 CB |
5231 | static int do_lxcapi_seccomp_notify_fd_active(struct lxc_container *c) |
5232 | { | |
5233 | if (!c || !c->lxc_conf) | |
5234 | return ret_set_errno(-1, -EINVAL); | |
5235 | ||
5236 | return lxc_cmd_get_seccomp_notify_fd(c->name, c->config_path); | |
5237 | } | |
5238 | ||
5239 | WRAP_API(int, lxcapi_seccomp_notify_fd_active) | |
5240 | ||
afeecbba | 5241 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5242 | { |
5243 | struct lxc_container *c; | |
cbb9c7c7 | 5244 | size_t len; |
9fbe07f6 | 5245 | int rc; |
72d0e1cb | 5246 | |
18aa217b SH |
5247 | if (!name) |
5248 | return NULL; | |
5249 | ||
72d0e1cb SG |
5250 | c = malloc(sizeof(*c)); |
5251 | if (!c) { | |
e9e29a33 | 5252 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5253 | return NULL; |
5254 | } | |
5255 | memset(c, 0, sizeof(*c)); | |
5256 | ||
afeecbba SH |
5257 | if (configpath) |
5258 | c->config_path = strdup(configpath); | |
5259 | else | |
593e8478 | 5260 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5261 | if (!c->config_path) { |
e9e29a33 | 5262 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5263 | goto err; |
5264 | } | |
5265 | ||
f5dd1d53 | 5266 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5267 | |
5268 | len = strlen(name); | |
5269 | c->name = malloc(len + 1); | |
72d0e1cb | 5270 | if (!c->name) { |
e9e29a33 | 5271 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5272 | goto err; |
5273 | } | |
cbb9c7c7 | 5274 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5275 | |
5276 | c->numthreads = 1; | |
e9e29a33 CB |
5277 | c->slock = lxc_newlock(c->config_path, name); |
5278 | if (!c->slock) { | |
5279 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5280 | goto err; |
5281 | } | |
5282 | ||
e9e29a33 CB |
5283 | c->privlock = lxc_newlock(NULL, NULL); |
5284 | if (!c->privlock) { | |
5285 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5286 | goto err; |
5287 | } | |
5288 | ||
afeecbba | 5289 | if (!set_config_filename(c)) { |
e9e29a33 | 5290 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5291 | goto err; |
5292 | } | |
72d0e1cb | 5293 | |
e9e29a33 CB |
5294 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5295 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5296 | goto err; |
e9e29a33 | 5297 | } |
72d0e1cb | 5298 | |
9fbe07f6 RK |
5299 | rc = ongoing_create(c); |
5300 | switch (rc) { | |
5301 | case LXC_CREATE_INCOMPLETE: | |
5302 | SYSERROR("Failed to complete container creation for %s", c->name); | |
17a367d8 | 5303 | container_destroy(c, NULL); |
4df7f012 | 5304 | lxcapi_clear_config(c); |
9fbe07f6 RK |
5305 | break; |
5306 | case LXC_CREATE_ONGOING: | |
5307 | /* container creation going on */ | |
5308 | break; | |
5309 | case LXC_CREATE_FAILED: | |
5310 | /* container creation failed */ | |
5311 | if (errno != EACCES && errno != EPERM) { | |
5312 | /* insufficient privileges */ | |
5313 | SYSERROR("Failed checking for incomplete container %s creation", c->name); | |
5314 | goto err; | |
5315 | } | |
5316 | break; | |
3e625e2d | 5317 | } |
a73846d8 | 5318 | |
79463057 CB |
5319 | c->daemonize = true; |
5320 | c->pidfile = NULL; | |
3e625e2d | 5321 | |
1a0e70ac | 5322 | /* Assign the member functions. */ |
79463057 CB |
5323 | c->is_defined = lxcapi_is_defined; |
5324 | c->state = lxcapi_state; | |
5325 | c->is_running = lxcapi_is_running; | |
5326 | c->freeze = lxcapi_freeze; | |
5327 | c->unfreeze = lxcapi_unfreeze; | |
5328 | c->console = lxcapi_console; | |
5329 | c->console_getfd = lxcapi_console_getfd; | |
5330 | c->devpts_fd = lxcapi_devpts_fd; | |
5331 | c->init_pid = lxcapi_init_pid; | |
5332 | c->init_pidfd = lxcapi_init_pidfd; | |
5333 | c->load_config = lxcapi_load_config; | |
5334 | c->want_daemonize = lxcapi_want_daemonize; | |
5335 | c->want_close_all_fds = lxcapi_want_close_all_fds; | |
5336 | c->start = lxcapi_start; | |
5337 | c->startl = lxcapi_startl; | |
5338 | c->stop = lxcapi_stop; | |
5339 | c->config_file_name = lxcapi_config_file_name; | |
5340 | c->wait = lxcapi_wait; | |
5341 | c->set_config_item = lxcapi_set_config_item; | |
5342 | c->destroy = lxcapi_destroy; | |
5343 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; | |
5344 | c->rename = lxcapi_rename; | |
5345 | c->save_config = lxcapi_save_config; | |
5346 | c->get_keys = lxcapi_get_keys; | |
5347 | c->create = lxcapi_create; | |
5348 | c->createl = lxcapi_createl; | |
5349 | c->shutdown = lxcapi_shutdown; | |
5350 | c->reboot = lxcapi_reboot; | |
5351 | c->reboot2 = lxcapi_reboot2; | |
5352 | c->clear_config = lxcapi_clear_config; | |
5353 | c->clear_config_item = lxcapi_clear_config_item; | |
5354 | c->get_config_item = lxcapi_get_config_item; | |
5355 | c->get_running_config_item = lxcapi_get_running_config_item; | |
5356 | c->get_cgroup_item = lxcapi_get_cgroup_item; | |
5357 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
5358 | c->get_config_path = lxcapi_get_config_path; | |
5359 | c->set_config_path = lxcapi_set_config_path; | |
5360 | c->clone = lxcapi_clone; | |
5361 | c->get_interfaces = lxcapi_get_interfaces; | |
5362 | c->get_ips = lxcapi_get_ips; | |
5363 | c->attach = lxcapi_attach; | |
5364 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5365 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
5366 | c->snapshot = lxcapi_snapshot; | |
5367 | c->snapshot_list = lxcapi_snapshot_list; | |
5368 | c->snapshot_restore = lxcapi_snapshot_restore; | |
5369 | c->snapshot_destroy = lxcapi_snapshot_destroy; | |
5370 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; | |
5371 | c->may_control = lxcapi_may_control; | |
5372 | c->add_device_node = lxcapi_add_device_node; | |
5373 | c->remove_device_node = lxcapi_remove_device_node; | |
5374 | c->attach_interface = lxcapi_attach_interface; | |
5375 | c->detach_interface = lxcapi_detach_interface; | |
5376 | c->checkpoint = lxcapi_checkpoint; | |
5377 | c->restore = lxcapi_restore; | |
5378 | c->migrate = lxcapi_migrate; | |
5379 | c->console_log = lxcapi_console_log; | |
5380 | c->mount = lxcapi_mount; | |
5381 | c->umount = lxcapi_umount; | |
5382 | c->seccomp_notify_fd = lxcapi_seccomp_notify_fd; | |
5383 | c->seccomp_notify_fd_active = lxcapi_seccomp_notify_fd_active; | |
72d0e1cb | 5384 | |
72d0e1cb SG |
5385 | return c; |
5386 | ||
5387 | err: | |
5388 | lxc_container_free(c); | |
5389 | return NULL; | |
5390 | } | |
5391 | ||
4a7c7daa | 5392 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5393 | { |
5394 | int i; | |
5395 | ||
5396 | if (states) | |
5397 | for (i=0; i<MAX_STATE; i++) | |
5398 | states[i] = lxc_state2str(i); | |
a73846d8 | 5399 | |
72d0e1cb SG |
5400 | return MAX_STATE; |
5401 | } | |
a41f104b | 5402 | |
a41f104b SH |
5403 | /* |
5404 | * These next two could probably be done smarter with reusing a common function | |
5405 | * with different iterators and tests... | |
5406 | */ | |
1f7dd3d5 CB |
5407 | int list_defined_containers(const char *lxcpath, char ***names, |
5408 | struct lxc_container ***cret) | |
a41f104b | 5409 | { |
4110345b | 5410 | __do_closedir DIR *dir = NULL; |
1f7dd3d5 | 5411 | size_t array_len = 0, name_array_len = 0, ct_array_len = 0; |
74f96976 | 5412 | struct dirent *direntp; |
a41f104b SH |
5413 | struct lxc_container *c; |
5414 | ||
5415 | if (!lxcpath) | |
593e8478 | 5416 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5417 | |
a41f104b | 5418 | dir = opendir(lxcpath); |
a41f104b SH |
5419 | if (!dir) { |
5420 | SYSERROR("opendir on lxcpath"); | |
5421 | return -1; | |
5422 | } | |
5423 | ||
5424 | if (cret) | |
5425 | *cret = NULL; | |
a73846d8 | 5426 | |
a41f104b SH |
5427 | if (names) |
5428 | *names = NULL; | |
5429 | ||
74f96976 | 5430 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5431 | /* Ignore '.', '..' and any hidden directory. */ |
948fcf60 | 5432 | if (strnequal(direntp->d_name, ".", 1)) |
a41f104b SH |
5433 | continue; |
5434 | ||
5435 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5436 | continue; | |
5437 | ||
1f7dd3d5 CB |
5438 | if (cret) { |
5439 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5440 | if (!c) { | |
5441 | INFO("Container %s:%s has a config but could not be loaded", | |
5442 | lxcpath, direntp->d_name); | |
5443 | continue; | |
5444 | } | |
a73846d8 | 5445 | |
1f7dd3d5 CB |
5446 | if (!do_lxcapi_is_defined(c)) { |
5447 | INFO("Container %s:%s has a config but is not defined", | |
5448 | lxcpath, direntp->d_name); | |
a73846d8 | 5449 | |
1f7dd3d5 CB |
5450 | lxc_container_put(c); |
5451 | continue; | |
5452 | } | |
a41f104b | 5453 | } |
a73846d8 | 5454 | |
1f7dd3d5 CB |
5455 | if (names) { |
5456 | if (!add_to_array(names, direntp->d_name, array_len)) | |
5457 | goto free_bad; | |
5458 | name_array_len++; | |
a41f104b SH |
5459 | } |
5460 | ||
1f7dd3d5 CB |
5461 | if (cret) { |
5462 | if (!add_to_clist(cret, c, array_len, true)) { | |
5463 | lxc_container_put(c); | |
5464 | goto free_bad; | |
5465 | } | |
5466 | ct_array_len++; | |
a41f104b | 5467 | } |
a73846d8 | 5468 | |
1f7dd3d5 | 5469 | array_len++; |
a41f104b SH |
5470 | } |
5471 | ||
1f7dd3d5 | 5472 | return array_len; |
a41f104b SH |
5473 | |
5474 | free_bad: | |
5475 | if (names && *names) { | |
652a1f4b | 5476 | for (size_t i = 0; i < name_array_len; i++) |
a41f104b SH |
5477 | free((*names)[i]); |
5478 | free(*names); | |
5479 | } | |
a73846d8 | 5480 | |
a41f104b | 5481 | if (cret && *cret) { |
652a1f4b | 5482 | for (size_t i = 0; i < ct_array_len; i++) |
a41f104b SH |
5483 | lxc_container_put((*cret)[i]); |
5484 | free(*cret); | |
5485 | } | |
a73846d8 | 5486 | |
a41f104b SH |
5487 | return -1; |
5488 | } | |
5489 | ||
148a9d27 DE |
5490 | int list_active_containers(const char *lxcpath, char ***nret, |
5491 | struct lxc_container ***cret) | |
a41f104b | 5492 | { |
768e7ba2 CB |
5493 | __do_free char *line = NULL; |
5494 | __do_fclose FILE *f = NULL; | |
148a9d27 | 5495 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b | 5496 | int lxcpath_len; |
148a9d27 | 5497 | char **ct_name = NULL; |
a41f104b | 5498 | size_t len = 0; |
97bc2422 | 5499 | struct lxc_container *c = NULL; |
88556fd7 | 5500 | bool is_hashed; |
a41f104b SH |
5501 | |
5502 | if (!lxcpath) | |
593e8478 | 5503 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5504 | lxcpath_len = strlen(lxcpath); |
5505 | ||
5506 | if (cret) | |
5507 | *cret = NULL; | |
a73846d8 | 5508 | |
148a9d27 DE |
5509 | if (nret) |
5510 | *nret = NULL; | |
a41f104b | 5511 | |
768e7ba2 | 5512 | f = fopen("/proc/net/unix", "re"); |
a41f104b SH |
5513 | if (!f) |
5514 | return -1; | |
5515 | ||
5516 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5517 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5518 | if (!p) |
5519 | continue; | |
5520 | p++; | |
a73846d8 | 5521 | |
a41f104b SH |
5522 | if (*p != 0x40) |
5523 | continue; | |
5524 | p++; | |
88556fd7 ÇO |
5525 | |
5526 | is_hashed = false; | |
a73846d8 | 5527 | |
948fcf60 | 5528 | if (strnequal(p, lxcpath, lxcpath_len)) { |
88556fd7 | 5529 | p += lxcpath_len; |
948fcf60 | 5530 | } else if (strnequal(p, "lxc/", 4)) { |
88556fd7 ÇO |
5531 | p += 4; |
5532 | is_hashed = true; | |
5533 | } else { | |
a41f104b | 5534 | continue; |
88556fd7 ÇO |
5535 | } |
5536 | ||
a41f104b SH |
5537 | while (*p == '/') |
5538 | p++; | |
5539 | ||
1a0e70ac | 5540 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5541 | p2 = strchr(p, '/'); |
948fcf60 | 5542 | if (!p2 || !strnequal(p2, "/command", 8)) |
a41f104b SH |
5543 | continue; |
5544 | *p2 = '\0'; | |
5545 | ||
88556fd7 | 5546 | if (is_hashed) { |
899a9f55 CB |
5547 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5548 | if (!recvpath) | |
5549 | continue; | |
a73846d8 | 5550 | |
948fcf60 | 5551 | if (!strnequal(lxcpath, recvpath, lxcpath_len)) { |
e07eafa8 | 5552 | free(recvpath); |
88556fd7 | 5553 | continue; |
e07eafa8 L |
5554 | } |
5555 | free(recvpath); | |
a73846d8 | 5556 | |
88556fd7 | 5557 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5558 | if (!p) |
5559 | continue; | |
88556fd7 ÇO |
5560 | } |
5561 | ||
e07eafa8 L |
5562 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5563 | if (is_hashed) | |
5564 | free(p); | |
9c88ff1f | 5565 | continue; |
e07eafa8 | 5566 | } |
9c88ff1f | 5567 | |
e07eafa8 L |
5568 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5569 | if (is_hashed) | |
5570 | free(p); | |
148a9d27 | 5571 | goto free_cret_list; |
e07eafa8 | 5572 | } |
9c88ff1f | 5573 | |
148a9d27 | 5574 | ct_name_cnt++; |
a41f104b | 5575 | |
e07eafa8 L |
5576 | if (!cret) { |
5577 | if (is_hashed) | |
5578 | free(p); | |
a41f104b | 5579 | continue; |
e07eafa8 | 5580 | } |
a41f104b SH |
5581 | |
5582 | c = lxc_container_new(p, lxcpath); | |
5583 | if (!c) { | |
4a0d9c99 | 5584 | INFO("Container %s:%s is running but could not be loaded", lxcpath, p); |
e07eafa8 L |
5585 | if (is_hashed) |
5586 | free(p); | |
a73846d8 | 5587 | |
4a0d9c99 | 5588 | goto free_cret_list; |
a41f104b SH |
5589 | } |
5590 | ||
e07eafa8 L |
5591 | if (is_hashed) |
5592 | free(p); | |
5593 | ||
a41f104b SH |
5594 | /* |
5595 | * If this is an anonymous container, then is_defined *can* | |
5596 | * return false. So we don't do that check. Count on the | |
5597 | * fact that the command socket exists. | |
5598 | */ | |
5599 | ||
148a9d27 | 5600 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5601 | lxc_container_put(c); |
148a9d27 | 5602 | goto free_cret_list; |
a41f104b | 5603 | } |
a73846d8 | 5604 | |
148a9d27 | 5605 | cret_cnt++; |
a41f104b SH |
5606 | } |
5607 | ||
97bc2422 CB |
5608 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5609 | if (c) | |
5610 | lxc_container_put(c); | |
5611 | goto free_cret_list; | |
5612 | } | |
5613 | ||
148a9d27 DE |
5614 | ret = ct_name_cnt; |
5615 | if (nret) | |
5616 | *nret = ct_name; | |
5617 | else | |
5618 | goto free_ct_name; | |
a73846d8 | 5619 | |
148a9d27 | 5620 | goto out; |
a41f104b | 5621 | |
148a9d27 | 5622 | free_cret_list: |
a41f104b | 5623 | if (cret && *cret) { |
148a9d27 | 5624 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5625 | lxc_container_put((*cret)[i]); |
5626 | free(*cret); | |
5627 | } | |
148a9d27 DE |
5628 | |
5629 | free_ct_name: | |
5630 | if (ct_name) { | |
5631 | for (i = 0; i < ct_name_cnt; i++) | |
5632 | free(ct_name[i]); | |
5633 | free(ct_name); | |
5634 | } | |
5635 | ||
5636 | out: | |
148a9d27 | 5637 | return ret; |
a41f104b | 5638 | } |
2871830a DE |
5639 | |
5640 | int list_all_containers(const char *lxcpath, char ***nret, | |
5641 | struct lxc_container ***cret) | |
5642 | { | |
4a0d9c99 CB |
5643 | int active_cnt, ct_cnt, ct_list_cnt, ret; |
5644 | char **active_name = NULL, **ct_name = NULL; | |
2871830a DE |
5645 | struct lxc_container **ct_list = NULL; |
5646 | ||
5647 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5648 | if (ct_cnt < 0) | |
5649 | return ct_cnt; | |
5650 | ||
5651 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5652 | if (active_cnt < 0) { | |
5653 | ret = active_cnt; | |
5654 | goto free_ct_name; | |
5655 | } | |
5656 | ||
4a0d9c99 CB |
5657 | ret = -EINVAL; |
5658 | for (int i = 0; i < active_cnt; i++) { | |
5659 | if (array_contains(&ct_name, active_name[i], ct_cnt)) | |
5660 | continue; | |
a73846d8 | 5661 | |
4a0d9c99 CB |
5662 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) |
5663 | goto free_active_name; | |
a73846d8 | 5664 | |
4a0d9c99 | 5665 | ct_cnt++; |
2871830a | 5666 | } |
a73846d8 | 5667 | |
4a0d9c99 CB |
5668 | if (cret) { |
5669 | ct_list_cnt = 0; | |
5670 | for (int i = 0; i < ct_cnt; i++) { | |
5671 | __put_lxc_container struct lxc_container *c = NULL; | |
2871830a | 5672 | |
4a0d9c99 CB |
5673 | c = lxc_container_new(ct_name[i], lxcpath); |
5674 | if (!c) { | |
5675 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5676 | goto free_ct_list; | |
5677 | } | |
2871830a | 5678 | |
4a0d9c99 CB |
5679 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) |
5680 | goto free_ct_list; | |
2871830a | 5681 | |
4a0d9c99 CB |
5682 | ct_list_cnt++; |
5683 | move_ptr(c); | |
2871830a | 5684 | } |
a73846d8 | 5685 | |
4a0d9c99 | 5686 | *cret = ct_list; |
2871830a DE |
5687 | } |
5688 | ||
4a0d9c99 CB |
5689 | for (int i = 0; i < active_cnt; i++) |
5690 | free(active_name[i]); | |
5691 | free(active_name); | |
2871830a | 5692 | |
a73846d8 | 5693 | if (nret) { |
2871830a | 5694 | *nret = ct_name; |
a73846d8 | 5695 | } else { |
4a0d9c99 CB |
5696 | for (int i = 0; i < ct_cnt; i++) |
5697 | free(ct_name[i]); | |
5698 | free(ct_name); | |
2871830a | 5699 | } |
a73846d8 | 5700 | |
2871830a DE |
5701 | return ct_cnt; |
5702 | ||
5703 | free_ct_list: | |
4a0d9c99 | 5704 | for (int i = 0; i < ct_list_cnt; i++) |
2871830a | 5705 | lxc_container_put(ct_list[i]); |
f10fad2f | 5706 | free(ct_list); |
2871830a DE |
5707 | |
5708 | free_active_name: | |
4a0d9c99 | 5709 | for (int i = 0; i < active_cnt; i++) |
f10fad2f | 5710 | free(active_name[i]); |
f10fad2f | 5711 | free(active_name); |
2871830a DE |
5712 | |
5713 | free_ct_name: | |
4a0d9c99 | 5714 | for (int i = 0; i < ct_cnt; i++) |
2871830a | 5715 | free(ct_name[i]); |
2871830a | 5716 | free(ct_name); |
4a0d9c99 | 5717 | |
2871830a DE |
5718 | return ret; |
5719 | } | |
12461428 CB |
5720 | |
5721 | bool lxc_config_item_is_supported(const char *key) | |
5722 | { | |
6eb516a7 | 5723 | return !!lxc_get_config_exact(key); |
12461428 | 5724 | } |
aafa5f96 CB |
5725 | |
5726 | bool lxc_has_api_extension(const char *extension) | |
5727 | { | |
5728 | /* The NULL API extension is always present. :) */ | |
5729 | if (!extension) | |
5730 | return true; | |
5731 | ||
5732 | for (size_t i = 0; i < nr_api_extensions; i++) | |
62dcc033 | 5733 | if (strequal(api_extensions[i], extension)) |
aafa5f96 CB |
5734 | return true; |
5735 | ||
5736 | return false; | |
5737 | } |