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Commit | Line | Data |
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cc73685d | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
72d0e1cb | 2 | |
d38dd64a CB |
3 | #ifndef _GNU_SOURCE |
4 | #define _GNU_SOURCE 1 | |
5 | #endif | |
0e14584d | 6 | #include <arpa/inet.h> |
38683db4 | 7 | #include <dirent.h> |
9be53773 | 8 | #include <errno.h> |
93dc5327 | 9 | #include <fcntl.h> |
38683db4 | 10 | #include <grp.h> |
f2363e38 | 11 | #include <libgen.h> |
38683db4 CB |
12 | #include <pthread.h> |
13 | #include <sched.h> | |
14 | #include <stdarg.h> | |
d659597e | 15 | #include <stdint.h> |
9fc7f8c0 | 16 | #include <stdio.h> |
29df56cd | 17 | #include <stdlib.h> |
56474555 | 18 | #include <sys/file.h> |
38683db4 CB |
19 | #include <sys/mman.h> |
20 | #include <sys/mount.h> | |
29df56cd | 21 | #include <sys/stat.h> |
5f7eba0b | 22 | #include <sys/syscall.h> |
0e14584d | 23 | #include <sys/sysmacros.h> |
38683db4 CB |
24 | #include <sys/types.h> |
25 | #include <sys/wait.h> | |
0e14584d | 26 | #include <unistd.h> |
f2363e38 | 27 | |
d38dd64a | 28 | #include "../include/netns_ifaddrs.h" |
5e5576a4 | 29 | #include "af_unix.h" |
aafa5f96 | 30 | #include "api_extensions.h" |
38683db4 | 31 | #include "attach.h" |
38683db4 | 32 | #include "cgroup.h" |
1b5d4bd8 | 33 | #include "macro.h" |
38683db4 | 34 | #include "commands.h" |
92e35018 | 35 | #include "commands_utils.h" |
0e14584d CB |
36 | #include "conf.h" |
37 | #include "config.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 CB |
44 | #include "lxc.h" |
45 | #include "lxccontainer.h" | |
46 | #include "lxclock.h" | |
f5849fd7 | 47 | #include "memory_utils.h" |
f2363e38 ÇO |
48 | #include "monitor.h" |
49 | #include "namespace.h" | |
fed29fad | 50 | #include "network.h" |
9994d140 | 51 | #include "parse.h" |
d7b58715 | 52 | #include "raw_syscalls.h" |
aa460476 | 53 | #include "start.h" |
38683db4 | 54 | #include "state.h" |
28d832c4 CB |
55 | #include "storage.h" |
56 | #include "storage/btrfs.h" | |
57 | #include "storage/overlay.h" | |
0e14584d | 58 | #include "storage_utils.h" |
28d832c4 | 59 | #include "sync.h" |
e8f764b6 | 60 | #include "syscall_wrappers.h" |
0ed9b1bc | 61 | #include "terminal.h" |
38683db4 CB |
62 | #include "utils.h" |
63 | #include "version.h" | |
4ba0d9af | 64 | |
fa2bb6ba SH |
65 | #if HAVE_OPENSSL |
66 | #include <openssl/evp.h> | |
67 | #endif | |
68 | ||
af6824fc ST |
69 | /* major()/minor() */ |
70 | #ifdef MAJOR_IN_MKDEV | |
238b3e5e | 71 | #include <sys/mkdev.h> |
af6824fc | 72 | #endif |
af6824fc | 73 | |
684f79a5 SG |
74 | #if IS_BIONIC |
75 | #include <../include/lxcmntent.h> | |
76 | #else | |
77 | #include <mntent.h> | |
78 | #endif | |
79 | ||
9de31d5a CB |
80 | #ifndef HAVE_STRLCPY |
81 | #include "include/strlcpy.h" | |
82 | #endif | |
83 | ||
5f7eba0b SG |
84 | /* Define faccessat() if missing from the C library */ |
85 | #ifndef HAVE_FACCESSAT | |
86 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
87 | { | |
88 | #ifdef __NR_faccessat | |
238b3e5e | 89 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); |
5f7eba0b | 90 | #else |
238b3e5e CB |
91 | errno = ENOSYS; |
92 | return -1; | |
5f7eba0b SG |
93 | #endif |
94 | } | |
95 | #endif | |
96 | ||
ac2cecc4 | 97 | lxc_log_define(lxccontainer, lxc); |
72d0e1cb | 98 | |
858377e4 SH |
99 | static bool do_lxcapi_destroy(struct lxc_container *c); |
100 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
101 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
102 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
17a367d8 CB |
103 | static bool container_destroy(struct lxc_container *c, |
104 | struct lxc_storage *storage); | |
858377e4 SH |
105 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); |
106 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
107 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
108 | ||
a41f104b SH |
109 | static bool config_file_exists(const char *lxcpath, const char *cname) |
110 | { | |
7a99b5a0 | 111 | __do_free char *fname = NULL; |
ef1ab8f1 CB |
112 | int ret; |
113 | size_t len; | |
a41f104b | 114 | |
ef1ab8f1 | 115 | /* $lxcpath + '/' + $cname + '/config' + \0 */ |
1b5d4bd8 | 116 | len = strlen(lxcpath) + 1 + strlen(cname) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
f5849fd7 | 117 | fname = must_realloc(NULL, len); |
1b5d4bd8 | 118 | ret = snprintf(fname, len, "%s/%s/%s", lxcpath, cname, LXC_CONFIG_FNAME); |
ef1ab8f1 | 119 | if (ret < 0 || (size_t)ret >= len) |
a41f104b SH |
120 | return false; |
121 | ||
122 | return file_exists(fname); | |
123 | } | |
124 | ||
9fbe07f6 RK |
125 | /* |
126 | * A few functions to help detect when a container creation failed. If a | |
444249ea CB |
127 | * container creation was killed partway through, then trying to actually start |
128 | * that container could harm the host. We detect this by creating a 'partial' | |
129 | * file under the container directory, and keeping an advisory lock. When | |
130 | * container creation completes, we remove that file. When we load or try to | |
131 | * start a container, if we find that file, without a flock, we remove the | |
132 | * container. | |
3e625e2d | 133 | */ |
9fbe07f6 RK |
134 | enum { |
135 | LXC_CREATE_FAILED = -1, | |
136 | LXC_CREATE_SUCCESS = 0, | |
137 | LXC_CREATE_ONGOING = 1, | |
138 | LXC_CREATE_INCOMPLETE = 2, | |
139 | }; | |
140 | ||
74a3920a | 141 | static int ongoing_create(struct lxc_container *c) |
3e625e2d | 142 | { |
9fbe07f6 | 143 | __do_close_prot_errno int fd = -EBADF; |
7a99b5a0 | 144 | __do_free char *path = NULL; |
56474555 | 145 | struct flock lk = {0}; |
9fbe07f6 RK |
146 | int ret; |
147 | size_t len; | |
93dc5327 | 148 | |
1b5d4bd8 | 149 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 150 | path = must_realloc(NULL, len); |
1b5d4bd8 | 151 | ret = snprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
444249ea | 152 | if (ret < 0 || (size_t)ret >= len) |
9fbe07f6 | 153 | return LXC_CREATE_FAILED; |
3e625e2d | 154 | |
d1bc8d48 CB |
155 | fd = open(path, O_RDWR | O_CLOEXEC); |
156 | if (fd < 0) { | |
157 | if (errno != ENOENT) | |
9fbe07f6 | 158 | return LXC_CREATE_FAILED; |
444249ea | 159 | |
9fbe07f6 | 160 | return LXC_CREATE_SUCCESS; |
d1bc8d48 | 161 | } |
444249ea | 162 | |
93dc5327 SH |
163 | lk.l_type = F_WRLCK; |
164 | lk.l_whence = SEEK_SET; | |
9fbe07f6 RK |
165 | /* |
166 | * F_OFD_GETLK requires that l_pid be set to 0 otherwise the kernel | |
ec74f3f8 CB |
167 | * will EINVAL us. |
168 | */ | |
169 | lk.l_pid = 0; | |
444249ea | 170 | |
56474555 | 171 | ret = fcntl(fd, F_OFD_GETLK, &lk); |
d1bc8d48 | 172 | if (ret < 0 && errno == EINVAL) { |
56474555 | 173 | ret = flock(fd, LOCK_EX | LOCK_NB); |
d1bc8d48 CB |
174 | if (ret < 0 && errno == EWOULDBLOCK) |
175 | ret = 0; | |
176 | } | |
a73846d8 | 177 | |
ec74f3f8 CB |
178 | /* F_OFD_GETLK will not send us back a pid so don't check it. */ |
179 | if (ret == 0) | |
180 | /* Create is still ongoing. */ | |
9fbe07f6 | 181 | return LXC_CREATE_ONGOING; |
444249ea CB |
182 | |
183 | /* Create completed but partial is still there. */ | |
9fbe07f6 | 184 | return LXC_CREATE_INCOMPLETE; |
3e625e2d SH |
185 | } |
186 | ||
74a3920a | 187 | static int create_partial(struct lxc_container *c) |
3e625e2d | 188 | { |
7a99b5a0 | 189 | __do_free char *path = NULL; |
3e625e2d | 190 | int fd, ret; |
f5cd0252 | 191 | size_t len; |
56474555 | 192 | struct flock lk = {0}; |
93dc5327 | 193 | |
f5cd0252 | 194 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
1b5d4bd8 | 195 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 196 | path = must_realloc(NULL, len); |
1b5d4bd8 | 197 | ret = snprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
f5cd0252 | 198 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 199 | return -1; |
f5cd0252 | 200 | |
d1bc8d48 | 201 | fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, 0000); |
f5cd0252 | 202 | if (fd < 0) |
3e625e2d | 203 | return -1; |
f5cd0252 | 204 | |
93dc5327 SH |
205 | lk.l_type = F_WRLCK; |
206 | lk.l_whence = SEEK_SET; | |
f5cd0252 | 207 | |
56474555 | 208 | ret = fcntl(fd, F_OFD_SETLKW, &lk); |
f5cd0252 | 209 | if (ret < 0) { |
56474555 CB |
210 | if (errno == EINVAL) { |
211 | ret = flock(fd, LOCK_EX); | |
212 | if (ret == 0) | |
213 | return fd; | |
214 | } | |
215 | ||
f5cd0252 | 216 | SYSERROR("Failed to lock partial file %s", path); |
3e625e2d | 217 | close(fd); |
3e625e2d SH |
218 | return -1; |
219 | } | |
3e625e2d SH |
220 | |
221 | return fd; | |
222 | } | |
223 | ||
74a3920a | 224 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d | 225 | { |
7a99b5a0 | 226 | __do_free char *path = NULL; |
3e625e2d | 227 | int ret; |
a3740e80 | 228 | size_t len; |
3e625e2d SH |
229 | |
230 | close(fd); | |
a73846d8 | 231 | |
a3740e80 | 232 | /* $lxcpath + '/' + $name + '/partial' + \0 */ |
1b5d4bd8 | 233 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_PARTIAL_FNAME) + 1; |
f5849fd7 | 234 | path = must_realloc(NULL, len); |
1b5d4bd8 | 235 | ret = snprintf(path, len, "%s/%s/%s", c->config_path, c->name, LXC_PARTIAL_FNAME); |
a3740e80 | 236 | if (ret < 0 || (size_t)ret >= len) |
3e625e2d | 237 | return; |
a3740e80 CB |
238 | |
239 | ret = unlink(path); | |
240 | if (ret < 0) | |
241 | SYSERROR("Failed to remove partial file %s", path); | |
3e625e2d SH |
242 | } |
243 | ||
72d0e1cb | 244 | /* LOCKING |
3bc449ed SH |
245 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
246 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
247 | * container configuration file. | |
248 | * The container_disk_lock also takes the container_mem_lock. | |
249 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
250 | * NOTHING mutexes two independent programs with their own struct |
251 | * lxc_container for the same c->name, between API calls. For instance, | |
252 | * c->config_read(); c->start(); Between those calls, data on disk | |
253 | * could change (which shouldn't bother the caller unless for instance | |
254 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
255 | * Two such updaters could race. The callers should therefore check their | |
256 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
257 | * due to hung callers. So I prefer to keep the locks only within our own | |
258 | * functions, not across functions. | |
259 | * | |
3bc449ed | 260 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
261 | * c->numthreads (under privlock) before forking. When deleting, |
262 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
263 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
264 | */ | |
72d0e1cb SG |
265 | static void lxc_container_free(struct lxc_container *c) |
266 | { | |
267 | if (!c) | |
268 | return; | |
269 | ||
f10fad2f ME |
270 | free(c->configfile); |
271 | c->configfile = NULL; | |
70849dc2 | 272 | |
f10fad2f ME |
273 | free(c->error_string); |
274 | c->error_string = NULL; | |
70849dc2 | 275 | |
d95db067 | 276 | if (c->slock) { |
df271a59 | 277 | lxc_putlock(c->slock); |
d95db067 DE |
278 | c->slock = NULL; |
279 | } | |
70849dc2 | 280 | |
72d0e1cb | 281 | if (c->privlock) { |
df271a59 | 282 | lxc_putlock(c->privlock); |
72d0e1cb SG |
283 | c->privlock = NULL; |
284 | } | |
70849dc2 | 285 | |
f10fad2f ME |
286 | free(c->name); |
287 | c->name = NULL; | |
70849dc2 | 288 | |
d95db067 DE |
289 | if (c->lxc_conf) { |
290 | lxc_conf_free(c->lxc_conf); | |
291 | c->lxc_conf = NULL; | |
292 | } | |
70849dc2 | 293 | |
f10fad2f ME |
294 | free(c->config_path); |
295 | c->config_path = NULL; | |
72cf75fa | 296 | |
72d0e1cb SG |
297 | free(c); |
298 | } | |
299 | ||
045552aa CB |
300 | /* Consider the following case: |
301 | * | |
302 | * |====================================================================| | |
303 | * | freer | racing get()er | | |
304 | * |====================================================================| | |
305 | * | lxc_container_put() | lxc_container_get() | | |
306 | * | \ lxclock(c->privlock) | c->numthreads < 1? (no) | | |
307 | * | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | | |
308 | * | \ lxcunlock() | \ | | |
309 | * | \ lxc_container_free() | \ lxclock() returns | | |
310 | * | | \ c->numthreads < 1 -> return 0 | | |
311 | * | \ \ (free stuff) | | | |
312 | * | \ \ sem_destroy(privlock) | | | |
313 | * |_______________________________|____________________________________| | |
314 | * | |
43d1aa34 SH |
315 | * When the get()er checks numthreads the first time, one of the following |
316 | * is true: | |
317 | * 1. freer has set numthreads = 0. get() returns 0 | |
318 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
319 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
320 | * numthreads is 0 and exit without touching lxclock again.. | |
321 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
322 | * will see --numthreads = 1 and not call lxc_container_free(). | |
323 | */ | |
324 | ||
72d0e1cb SG |
325 | int lxc_container_get(struct lxc_container *c) |
326 | { | |
327 | if (!c) | |
328 | return 0; | |
329 | ||
1a0e70ac CB |
330 | /* If someone else has already started freeing the container, don't try |
331 | * to take the lock, which may be invalid. | |
332 | */ | |
43d1aa34 SH |
333 | if (c->numthreads < 1) |
334 | return 0; | |
335 | ||
5cee8c50 | 336 | if (container_mem_lock(c)) |
72d0e1cb | 337 | return 0; |
1a0e70ac CB |
338 | |
339 | /* Bail without trying to unlock, bc the privlock is now probably in | |
340 | * freed memory. | |
341 | */ | |
342 | if (c->numthreads < 1) | |
72d0e1cb | 343 | return 0; |
1a0e70ac | 344 | |
72d0e1cb | 345 | c->numthreads++; |
5cee8c50 | 346 | container_mem_unlock(c); |
045552aa | 347 | |
72d0e1cb SG |
348 | return 1; |
349 | } | |
350 | ||
351 | int lxc_container_put(struct lxc_container *c) | |
352 | { | |
353 | if (!c) | |
354 | return -1; | |
045552aa | 355 | |
5cee8c50 | 356 | if (container_mem_lock(c)) |
72d0e1cb | 357 | return -1; |
045552aa | 358 | |
44619b6c CB |
359 | c->numthreads--; |
360 | ||
361 | if (c->numthreads < 1) { | |
5cee8c50 | 362 | container_mem_unlock(c); |
72d0e1cb SG |
363 | lxc_container_free(c); |
364 | return 1; | |
365 | } | |
045552aa | 366 | |
5cee8c50 | 367 | container_mem_unlock(c); |
72d0e1cb SG |
368 | return 0; |
369 | } | |
370 | ||
858377e4 | 371 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb | 372 | { |
428ad142 | 373 | int statret; |
72d0e1cb SG |
374 | struct stat statbuf; |
375 | bool ret = false; | |
72d0e1cb SG |
376 | |
377 | if (!c) | |
378 | return false; | |
379 | ||
5cee8c50 | 380 | if (container_mem_lock(c)) |
72d0e1cb | 381 | return false; |
428ad142 | 382 | |
72d0e1cb | 383 | if (!c->configfile) |
428ad142 CB |
384 | goto on_error; |
385 | ||
72d0e1cb SG |
386 | statret = stat(c->configfile, &statbuf); |
387 | if (statret != 0) | |
428ad142 CB |
388 | goto on_error; |
389 | ||
72d0e1cb SG |
390 | ret = true; |
391 | ||
428ad142 | 392 | on_error: |
5cee8c50 | 393 | container_mem_unlock(c); |
72d0e1cb SG |
394 | return ret; |
395 | } | |
396 | ||
858377e4 SH |
397 | #define WRAP_API(rettype, fnname) \ |
398 | static rettype fnname(struct lxc_container *c) \ | |
399 | { \ | |
400 | rettype ret; \ | |
8164f0e2 TA |
401 | bool reset_config = false; \ |
402 | \ | |
403 | if (!current_config && c && c->lxc_conf) { \ | |
404 | current_config = c->lxc_conf; \ | |
405 | reset_config = true; \ | |
406 | } \ | |
407 | \ | |
858377e4 | 408 | ret = do_##fnname(c); \ |
8164f0e2 TA |
409 | if (reset_config) \ |
410 | current_config = NULL; \ | |
411 | \ | |
858377e4 SH |
412 | return ret; \ |
413 | } | |
414 | ||
415 | #define WRAP_API_1(rettype, fnname, t1) \ | |
416 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
417 | { \ | |
418 | rettype ret; \ | |
8164f0e2 TA |
419 | bool reset_config = false; \ |
420 | \ | |
421 | if (!current_config && c && c->lxc_conf) { \ | |
422 | current_config = c->lxc_conf; \ | |
423 | reset_config = true; \ | |
424 | } \ | |
425 | \ | |
858377e4 | 426 | ret = do_##fnname(c, a1); \ |
8164f0e2 TA |
427 | if (reset_config) \ |
428 | current_config = NULL; \ | |
429 | \ | |
858377e4 SH |
430 | return ret; \ |
431 | } | |
432 | ||
433 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
434 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
435 | { \ | |
436 | rettype ret; \ | |
8164f0e2 TA |
437 | bool reset_config = false; \ |
438 | \ | |
439 | if (!current_config && c && c->lxc_conf) { \ | |
440 | current_config = c->lxc_conf; \ | |
441 | reset_config = true; \ | |
442 | } \ | |
443 | \ | |
858377e4 | 444 | ret = do_##fnname(c, a1, a2); \ |
8164f0e2 TA |
445 | if (reset_config) \ |
446 | current_config = NULL; \ | |
447 | \ | |
858377e4 SH |
448 | return ret; \ |
449 | } | |
450 | ||
451 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
452 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
453 | { \ | |
454 | rettype ret; \ | |
8164f0e2 TA |
455 | bool reset_config = false; \ |
456 | \ | |
457 | if (!current_config && c && c->lxc_conf) { \ | |
458 | current_config = c->lxc_conf; \ | |
459 | reset_config = true; \ | |
460 | } \ | |
461 | \ | |
858377e4 | 462 | ret = do_##fnname(c, a1, a2, a3); \ |
8164f0e2 TA |
463 | if (reset_config) \ |
464 | current_config = NULL; \ | |
465 | \ | |
858377e4 SH |
466 | return ret; \ |
467 | } | |
468 | ||
29df56cd LT |
469 | #define WRAP_API_6(rettype, fnname, t1, t2, t3, t4, t5, t6) \ |
470 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3, \ | |
471 | t4 a4, t5 a5, t6 a6) \ | |
472 | { \ | |
473 | rettype ret; \ | |
474 | bool reset_config = false; \ | |
475 | \ | |
476 | if (!current_config && c && c->lxc_conf) { \ | |
477 | current_config = c->lxc_conf; \ | |
478 | reset_config = true; \ | |
479 | } \ | |
480 | \ | |
481 | ret = do_##fnname(c, a1, a2, a3, a4, a5, a6); \ | |
482 | if (reset_config) \ | |
483 | current_config = NULL; \ | |
484 | \ | |
485 | return ret; \ | |
486 | } | |
487 | ||
858377e4 SH |
488 | WRAP_API(bool, lxcapi_is_defined) |
489 | ||
490 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 491 | { |
72d0e1cb SG |
492 | lxc_state_t s; |
493 | ||
494 | if (!c) | |
495 | return NULL; | |
b547d79f | 496 | |
13f5be62 | 497 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 498 | return lxc_state2str(s); |
72d0e1cb SG |
499 | } |
500 | ||
858377e4 SH |
501 | WRAP_API(const char *, lxcapi_state) |
502 | ||
39dc698c | 503 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
504 | { |
505 | lxc_state_t s; | |
5bddcb62 | 506 | |
13f5be62 | 507 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
508 | return (s == STOPPED); |
509 | } | |
510 | ||
858377e4 | 511 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb | 512 | { |
72d0e1cb SG |
513 | if (!c) |
514 | return false; | |
1b61062f | 515 | |
9e630418 | 516 | return !is_stopped(c); |
72d0e1cb SG |
517 | } |
518 | ||
858377e4 SH |
519 | WRAP_API(bool, lxcapi_is_running) |
520 | ||
521 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb | 522 | { |
2341916a | 523 | lxc_state_t s; |
8787b387 | 524 | |
02f71d7e | 525 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
526 | return false; |
527 | ||
2341916a | 528 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
529 | if (s != FROZEN) |
530 | return lxc_freeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8787b387 | 531 | |
72d0e1cb SG |
532 | return true; |
533 | } | |
534 | ||
858377e4 SH |
535 | WRAP_API(bool, lxcapi_freeze) |
536 | ||
537 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb | 538 | { |
2341916a | 539 | lxc_state_t s; |
8e59e0ba | 540 | |
02f71d7e | 541 | if (!c || !c->lxc_conf) |
72d0e1cb SG |
542 | return false; |
543 | ||
2341916a | 544 | s = lxc_getstate(c->name, c->config_path); |
02f71d7e CB |
545 | if (s == FROZEN) |
546 | return lxc_unfreeze(c->lxc_conf, c->name, c->config_path) == 0; | |
8e59e0ba | 547 | |
72d0e1cb SG |
548 | return true; |
549 | } | |
550 | ||
858377e4 SH |
551 | WRAP_API(bool, lxcapi_unfreeze) |
552 | ||
553 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd | 554 | { |
0115f8fd DE |
555 | if (!c) |
556 | return -1; | |
557 | ||
c86e2584 | 558 | return lxc_terminal_getfd(c, ttynum, masterfd); |
0115f8fd DE |
559 | } |
560 | ||
858377e4 SH |
561 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
562 | ||
b5159817 DE |
563 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
564 | int stdoutfd, int stderrfd, int escape) | |
565 | { | |
858377e4 SH |
566 | int ret; |
567 | ||
568 | if (!c) | |
569 | return -1; | |
570 | ||
571 | current_config = c->lxc_conf; | |
572 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
573 | current_config = NULL; | |
49cfedb3 | 574 | |
858377e4 | 575 | return ret; |
b5159817 DE |
576 | } |
577 | ||
191d43cc CB |
578 | static int do_lxcapi_console_log(struct lxc_container *c, struct lxc_console_log *log) |
579 | { | |
580 | int ret; | |
581 | ||
5106ecd0 | 582 | if (!c) |
583 | return -EINVAL; | |
584 | ||
191d43cc CB |
585 | ret = lxc_cmd_console_log(c->name, do_lxcapi_get_config_path(c), log); |
586 | if (ret < 0) { | |
587 | if (ret == -ENODATA) | |
63b74cda | 588 | NOTICE("The console log is empty"); |
191d43cc | 589 | else if (ret == -EFAULT) |
63b74cda CB |
590 | NOTICE("The container does not keep a console log"); |
591 | else if (ret == -ENOENT) | |
592 | NOTICE("The container does not keep a console log file"); | |
593 | else if (ret == -EIO) | |
594 | NOTICE("Failed to write console log to log file"); | |
191d43cc | 595 | else |
63b74cda | 596 | ERROR("Failed to retrieve console log"); |
191d43cc CB |
597 | } |
598 | ||
599 | return ret; | |
600 | } | |
601 | ||
602 | WRAP_API_1(int, lxcapi_console_log, struct lxc_console_log *) | |
603 | ||
858377e4 | 604 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 605 | { |
72d0e1cb SG |
606 | if (!c) |
607 | return -1; | |
608 | ||
5cee8c50 | 609 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
610 | } |
611 | ||
858377e4 SH |
612 | WRAP_API(pid_t, lxcapi_init_pid) |
613 | ||
12a50cc6 | 614 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
615 | { |
616 | if (!c->lxc_conf) | |
617 | c->lxc_conf = lxc_conf_init(); | |
e3246ab9 | 618 | |
6b0d5538 SH |
619 | if (!c->lxc_conf) |
620 | return false; | |
e3246ab9 | 621 | |
d08779d4 SH |
622 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
623 | return false; | |
e3246ab9 | 624 | |
c7b17051 | 625 | c->lxc_conf->name = c->name; |
d08779d4 | 626 | return true; |
8eb5694b SH |
627 | } |
628 | ||
858377e4 | 629 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 630 | { |
39dc698c | 631 | int lret; |
12a50cc6 | 632 | const char *fname; |
d03ab308 CB |
633 | bool need_disklock = false, ret = false; |
634 | ||
72d0e1cb SG |
635 | if (!c) |
636 | return false; | |
637 | ||
638 | fname = c->configfile; | |
a73846d8 | 639 | |
72d0e1cb SG |
640 | if (alt_file) |
641 | fname = alt_file; | |
a73846d8 | 642 | |
72d0e1cb SG |
643 | if (!fname) |
644 | return false; | |
d03ab308 CB |
645 | |
646 | /* If we're reading something other than the container's config, we only | |
647 | * need to lock the in-memory container. If loading the container's | |
648 | * config file, take the disk lock. | |
39dc698c SH |
649 | */ |
650 | if (strcmp(fname, c->configfile) == 0) | |
651 | need_disklock = true; | |
652 | ||
653 | if (need_disklock) | |
654 | lret = container_disk_lock(c); | |
655 | else | |
656 | lret = container_mem_lock(c); | |
657 | if (lret) | |
72d0e1cb | 658 | return false; |
39dc698c | 659 | |
8eb5694b | 660 | ret = load_config_locked(c, fname); |
39dc698c SH |
661 | |
662 | if (need_disklock) | |
663 | container_disk_unlock(c); | |
664 | else | |
665 | container_mem_unlock(c); | |
d03ab308 | 666 | |
72d0e1cb SG |
667 | return ret; |
668 | } | |
669 | ||
858377e4 SH |
670 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
671 | ||
672 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 673 | { |
497a2995 | 674 | if (!c || !c->lxc_conf) |
540f932a | 675 | return false; |
fb5999f6 CB |
676 | |
677 | if (container_mem_lock(c)) | |
540f932a | 678 | return false; |
fb5999f6 | 679 | |
a2739df5 | 680 | c->daemonize = state; |
d630991d | 681 | |
3bc449ed | 682 | container_mem_unlock(c); |
fb5999f6 | 683 | |
540f932a | 684 | return true; |
72d0e1cb SG |
685 | } |
686 | ||
858377e4 SH |
687 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
688 | ||
689 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
690 | { |
691 | if (!c || !c->lxc_conf) | |
49badbbe | 692 | return false; |
871ed23b CB |
693 | |
694 | if (container_mem_lock(c)) | |
49badbbe | 695 | return false; |
871ed23b | 696 | |
540f932a | 697 | c->lxc_conf->close_all_fds = state; |
d630991d | 698 | |
130a1888 | 699 | container_mem_unlock(c); |
871ed23b | 700 | |
49badbbe | 701 | return true; |
130a1888 ÇO |
702 | } |
703 | ||
858377e4 SH |
704 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
705 | ||
e202dfb8 CB |
706 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, |
707 | int timeout) | |
7a44c8b4 SG |
708 | { |
709 | int ret; | |
710 | ||
711 | if (!c) | |
712 | return false; | |
713 | ||
67e571de | 714 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
715 | return ret == 0; |
716 | } | |
717 | ||
858377e4 | 718 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 719 | |
2d834aa8 SH |
720 | static bool am_single_threaded(void) |
721 | { | |
4110345b | 722 | __do_closedir DIR *dir = NULL; |
d630991d | 723 | struct dirent *direntp; |
6b0297e3 | 724 | int count = 0; |
2d834aa8 | 725 | |
2d834aa8 | 726 | dir = opendir("/proc/self/task"); |
6b0297e3 | 727 | if (!dir) |
2d834aa8 | 728 | return false; |
2d834aa8 | 729 | |
74f96976 | 730 | while ((direntp = readdir(dir))) { |
d630991d | 731 | if (strcmp(direntp->d_name, ".") == 0) |
2d834aa8 SH |
732 | continue; |
733 | ||
d630991d | 734 | if (strcmp(direntp->d_name, "..") == 0) |
2d834aa8 | 735 | continue; |
6b0297e3 | 736 | |
d630991d CB |
737 | count++; |
738 | if (count > 1) | |
2d834aa8 SH |
739 | break; |
740 | } | |
6b0297e3 | 741 | |
2d834aa8 SH |
742 | return count == 1; |
743 | } | |
744 | ||
fd51a89b SH |
745 | static void push_arg(char ***argp, char *arg, int *nargs) |
746 | { | |
fd51a89b | 747 | char *copy; |
1452d3fe | 748 | char **argv; |
fd51a89b | 749 | |
d630991d | 750 | copy = must_copy_string(arg); |
1452d3fe | 751 | |
fd51a89b SH |
752 | do { |
753 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
754 | } while (!argv); | |
1452d3fe | 755 | |
fd51a89b SH |
756 | *argp = argv; |
757 | argv[*nargs] = copy; | |
758 | (*nargs)++; | |
759 | argv[*nargs] = NULL; | |
760 | } | |
761 | ||
762 | static char **split_init_cmd(const char *incmd) | |
763 | { | |
f5849fd7 CB |
764 | __do_free char *copy = NULL; |
765 | char *p; | |
fd51a89b | 766 | char **argv; |
75bd13ab | 767 | int nargs = 0; |
fd51a89b SH |
768 | |
769 | if (!incmd) | |
770 | return NULL; | |
771 | ||
f5849fd7 | 772 | copy = must_copy_string(incmd); |
fd51a89b SH |
773 | |
774 | do { | |
775 | argv = malloc(sizeof(char *)); | |
776 | } while (!argv); | |
75bd13ab | 777 | |
fd51a89b | 778 | argv[0] = NULL; |
f5849fd7 | 779 | lxc_iterate_parts (p, copy, " ") |
fd51a89b SH |
780 | push_arg(&argv, p, &nargs); |
781 | ||
782 | if (nargs == 0) { | |
783 | free(argv); | |
784 | return NULL; | |
785 | } | |
75bd13ab | 786 | |
fd51a89b SH |
787 | return argv; |
788 | } | |
789 | ||
790 | static void free_init_cmd(char **argv) | |
791 | { | |
792 | int i = 0; | |
793 | ||
794 | if (!argv) | |
795 | return; | |
702bf732 | 796 | |
fd51a89b SH |
797 | while (argv[i]) |
798 | free(argv[i++]); | |
702bf732 | 799 | |
fd51a89b SH |
800 | free(argv); |
801 | } | |
802 | ||
5e5576a4 CB |
803 | static int lxc_rcv_status(int state_socket) |
804 | { | |
a73846d8 | 805 | int ret; |
806 | int state = -1; | |
5e5576a4 | 807 | |
ee8377bd | 808 | again: |
a73846d8 | 809 | /* Receive container state. */ |
810 | ret = lxc_abstract_unix_rcv_credential(state_socket, &state, sizeof(int)); | |
811 | if (ret <= 0) { | |
ee8377bd CB |
812 | if (errno != EINTR) |
813 | return -1; | |
a73846d8 | 814 | |
ee8377bd CB |
815 | TRACE("Caught EINTR; retrying"); |
816 | goto again; | |
817 | } | |
5e5576a4 | 818 | |
a73846d8 | 819 | return state; |
5e5576a4 CB |
820 | } |
821 | ||
822 | static bool wait_on_daemonized_start(struct lxc_handler *handler, int pid) | |
823 | { | |
a73846d8 | 824 | int ret, state; |
5e5576a4 | 825 | |
c581d2a6 CB |
826 | /* The first child is going to fork() again and then exits. So we reap |
827 | * the first child here. | |
828 | */ | |
829 | ret = wait_for_pid(pid); | |
830 | if (ret < 0) | |
831 | DEBUG("Failed waiting on first child %d", pid); | |
832 | else | |
833 | DEBUG("First child %d exited", pid); | |
834 | ||
a73846d8 | 835 | /* Close write end of the socket pair. */ |
836 | close(handler->state_socket_pair[1]); | |
837 | handler->state_socket_pair[1] = -1; | |
5e5576a4 | 838 | |
a73846d8 | 839 | state = lxc_rcv_status(handler->state_socket_pair[0]); |
5e5576a4 | 840 | |
a73846d8 | 841 | /* Close read end of the socket pair. */ |
842 | close(handler->state_socket_pair[0]); | |
843 | handler->state_socket_pair[0] = -1; | |
5e5576a4 | 844 | |
a73846d8 | 845 | if (state < 0) { |
846 | SYSERROR("Failed to receive the container state"); | |
847 | return false; | |
848 | } | |
5e5576a4 | 849 | |
a73846d8 | 850 | /* If we receive anything else then running we know that the container |
851 | * failed to start. | |
852 | */ | |
853 | if (state != RUNNING) { | |
854 | ERROR("Received container state \"%s\" instead of \"RUNNING\"", | |
855 | lxc_state2str(state)); | |
856 | return false; | |
857 | } | |
5e5576a4 | 858 | |
a73846d8 | 859 | TRACE("Container is in \"RUNNING\" state"); |
860 | return true; | |
5e5576a4 CB |
861 | } |
862 | ||
858377e4 | 863 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
864 | { |
865 | int ret; | |
aa460476 | 866 | struct lxc_handler *handler; |
72d0e1cb | 867 | struct lxc_conf *conf; |
72d0e1cb SG |
868 | char *default_args[] = { |
869 | "/sbin/init", | |
13aad0ae | 870 | NULL, |
72d0e1cb | 871 | }; |
fd51a89b | 872 | char **init_cmd = NULL; |
c1a3e547 | 873 | int keepfds[3] = {-1, -1, -1}; |
72d0e1cb | 874 | |
7cb19d44 | 875 | /* container does exist */ |
72d0e1cb SG |
876 | if (!c) |
877 | return false; | |
120146b9 | 878 | |
7cb19d44 CB |
879 | /* If anything fails before we set error_num, we want an error in there. |
880 | */ | |
120146b9 SG |
881 | c->error_num = 1; |
882 | ||
7cb19d44 | 883 | /* Container has not been setup. */ |
72d0e1cb SG |
884 | if (!c->lxc_conf) |
885 | return false; | |
886 | ||
c47eafec | 887 | ret = ongoing_create(c); |
9fbe07f6 RK |
888 | switch (ret) { |
889 | case LXC_CREATE_FAILED: | |
7cb19d44 | 890 | ERROR("Failed checking for incomplete container creation"); |
3e625e2d | 891 | return false; |
9fbe07f6 | 892 | case LXC_CREATE_ONGOING: |
7cb19d44 | 893 | ERROR("Ongoing container creation detected"); |
3e625e2d | 894 | return false; |
9fbe07f6 | 895 | case LXC_CREATE_INCOMPLETE: |
7cb19d44 | 896 | ERROR("Failed to create container"); |
c47eafec CB |
897 | do_lxcapi_destroy(c); |
898 | return false; | |
3e625e2d SH |
899 | } |
900 | ||
5cee8c50 | 901 | if (container_mem_lock(c)) |
72d0e1cb | 902 | return false; |
d630991d | 903 | |
72d0e1cb | 904 | conf = c->lxc_conf; |
72d0e1cb | 905 | |
aa460476 | 906 | /* initialize handler */ |
9640c6a7 | 907 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
d630991d | 908 | |
dbc9832d | 909 | container_mem_unlock(c); |
aa460476 CB |
910 | if (!handler) |
911 | return false; | |
912 | ||
fa30091b CB |
913 | if (!argv) { |
914 | if (useinit && conf->execute_cmd) | |
915 | argv = init_cmd = split_init_cmd(conf->execute_cmd); | |
916 | else | |
917 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
918 | } | |
fd51a89b | 919 | |
7cb19d44 | 920 | /* ... otherwise use default_args. */ |
fa30091b | 921 | if (!argv) { |
e1e76423 CB |
922 | if (useinit) { |
923 | ERROR("No valid init detected"); | |
924 | lxc_free_handler(handler); | |
fa30091b | 925 | return false; |
e1e76423 CB |
926 | } |
927 | argv = default_args; | |
fa30091b | 928 | } |
72d0e1cb | 929 | |
7cb19d44 CB |
930 | /* I'm not sure what locks we want here.Any? Is liblxc's locking enough |
931 | * here to protect the on disk container? We don't want to exclude | |
932 | * things like lxc_info while the container is running. | |
933 | */ | |
9640c6a7 | 934 | if (c->daemonize) { |
a6b6ad7b | 935 | bool started; |
0a4be28d | 936 | char title[2048]; |
c581d2a6 | 937 | pid_t pid_first, pid_second; |
71454076 | 938 | |
c581d2a6 CB |
939 | pid_first = fork(); |
940 | if (pid_first < 0) { | |
c47eafec | 941 | free_init_cmd(init_cmd); |
f2e07cb6 | 942 | lxc_free_handler(handler); |
72d0e1cb | 943 | return false; |
f2e07cb6 | 944 | } |
6eaac303 | 945 | |
7cb19d44 | 946 | /* first parent */ |
c581d2a6 | 947 | if (pid_first != 0) { |
6eaac303 QH |
948 | /* Set to NULL because we don't want father unlink |
949 | * the PID file, child will do the free and unlink. | |
950 | */ | |
951 | c->pidfile = NULL; | |
5e5576a4 | 952 | |
7cb19d44 CB |
953 | /* Wait for container to tell us whether it started |
954 | * successfully. | |
955 | */ | |
c581d2a6 | 956 | started = wait_on_daemonized_start(handler, pid_first); |
a6b6ad7b CB |
957 | |
958 | free_init_cmd(init_cmd); | |
959 | lxc_free_handler(handler); | |
960 | return started; | |
6eaac303 | 961 | } |
025ed0f3 | 962 | |
7cb19d44 CB |
963 | /* first child */ |
964 | ||
0a4be28d | 965 | /* We don't really care if this doesn't print all the |
7cb19d44 CB |
966 | * characters. All that it means is that the proctitle will be |
967 | * ugly. Similarly, we also don't care if setproctitle() fails. | |
bafad468 CB |
968 | */ |
969 | ret = snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); | |
970 | if (ret > 0) { | |
971 | ret = setproctitle(title); | |
972 | if (ret < 0) | |
973 | INFO("Failed to set process title to %s", title); | |
974 | else | |
975 | INFO("Set process title to %s", title); | |
976 | } | |
0a4be28d | 977 | |
7cb19d44 CB |
978 | /* We fork() a second time to be reparented to init. Like |
979 | * POSIX's daemon() function we change to "/" and redirect | |
980 | * std{in,out,err} to /dev/null. | |
981 | */ | |
c581d2a6 CB |
982 | pid_second = fork(); |
983 | if (pid_second < 0) { | |
7cb19d44 | 984 | SYSERROR("Failed to fork first child process"); |
d608fbda | 985 | _exit(EXIT_FAILURE); |
697fa639 | 986 | } |
a6b6ad7b | 987 | |
7cb19d44 | 988 | /* second parent */ |
c581d2a6 | 989 | if (pid_second != 0) { |
a6b6ad7b CB |
990 | free_init_cmd(init_cmd); |
991 | lxc_free_handler(handler); | |
d608fbda | 992 | _exit(EXIT_SUCCESS); |
a6b6ad7b CB |
993 | } |
994 | ||
7cb19d44 CB |
995 | /* second child */ |
996 | ||
997 | /* change to / directory */ | |
998 | ret = chdir("/"); | |
999 | if (ret < 0) { | |
1000 | SYSERROR("Failed to change to \"/\" directory"); | |
d608fbda | 1001 | _exit(EXIT_FAILURE); |
c278cef2 | 1002 | } |
7cb19d44 | 1003 | |
c1a3e547 CB |
1004 | keepfds[0] = handler->conf->maincmd_fd; |
1005 | keepfds[1] = handler->state_socket_pair[0]; | |
1006 | keepfds[2] = handler->state_socket_pair[1]; | |
1007 | ret = lxc_check_inherited(conf, true, keepfds, | |
1008 | sizeof(keepfds) / sizeof(keepfds[0])); | |
7cb19d44 | 1009 | if (ret < 0) |
d608fbda | 1010 | _exit(EXIT_FAILURE); |
7cb19d44 CB |
1011 | |
1012 | /* redirect std{in,out,err} to /dev/null */ | |
1013 | ret = null_stdfds(); | |
1014 | if (ret < 0) { | |
1015 | ERROR("Failed to redirect std{in,out,err} to /dev/null"); | |
d608fbda | 1016 | _exit(EXIT_FAILURE); |
69aeabac | 1017 | } |
7cb19d44 CB |
1018 | |
1019 | /* become session leader */ | |
1020 | ret = setsid(); | |
1021 | if (ret < 0) | |
0059379f | 1022 | TRACE("Process %d is already process group leader", lxc_raw_getpid()); |
bafad468 CB |
1023 | } else if (!am_single_threaded()) { |
1024 | ERROR("Cannot start non-daemonized container when threaded"); | |
1025 | free_init_cmd(init_cmd); | |
1026 | lxc_free_handler(handler); | |
1027 | return false; | |
72d0e1cb SG |
1028 | } |
1029 | ||
bafad468 CB |
1030 | /* We need to write PID file after daemonize, so we always write the |
1031 | * right PID. | |
6eaac303 QH |
1032 | */ |
1033 | if (c->pidfile) { | |
a7547c5c | 1034 | int w; |
b07ea13d | 1035 | char pidstr[INTTYPE_TO_STRLEN(pid_t)]; |
7cea5905 | 1036 | |
b07ea13d | 1037 | w = snprintf(pidstr, sizeof(pidstr), "%d", lxc_raw_getpid()); |
979a0d93 | 1038 | if (w < 0 || (size_t)w >= sizeof(pidstr)) { |
c47eafec | 1039 | free_init_cmd(init_cmd); |
f2e07cb6 | 1040 | lxc_free_handler(handler); |
7cea5905 CB |
1041 | |
1042 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); | |
1043 | ||
9640c6a7 | 1044 | if (c->daemonize) |
d608fbda | 1045 | _exit(EXIT_FAILURE); |
7cea5905 | 1046 | |
6eaac303 QH |
1047 | return false; |
1048 | } | |
1049 | ||
7cea5905 CB |
1050 | ret = lxc_write_to_file(c->pidfile, pidstr, w, false, 0600); |
1051 | if (ret < 0) { | |
c47eafec | 1052 | free_init_cmd(init_cmd); |
f2e07cb6 | 1053 | lxc_free_handler(handler); |
7cea5905 | 1054 | |
bafad468 | 1055 | SYSERROR("Failed to write monitor pid to \"%s\"", c->pidfile); |
7cea5905 | 1056 | |
9640c6a7 | 1057 | if (c->daemonize) |
d608fbda | 1058 | _exit(EXIT_FAILURE); |
7cea5905 | 1059 | |
6eaac303 QH |
1060 | return false; |
1061 | } | |
6eaac303 QH |
1062 | } |
1063 | ||
80308d07 | 1064 | conf->reboot = REBOOT_NONE; |
d2cf4c37 | 1065 | |
a8dfe4e0 WB |
1066 | /* Unshare the mount namespace if requested */ |
1067 | if (conf->monitor_unshare) { | |
7cb19d44 CB |
1068 | ret = unshare(CLONE_NEWNS); |
1069 | if (ret < 0) { | |
bafad468 | 1070 | SYSERROR("Failed to unshare mount namespace"); |
f2e07cb6 | 1071 | lxc_free_handler(handler); |
a6b6ad7b | 1072 | ret = 1; |
7cb19d44 | 1073 | goto on_error; |
a8dfe4e0 | 1074 | } |
7cb19d44 CB |
1075 | |
1076 | ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL); | |
1077 | if (ret < 0) { | |
a8dfe4e0 | 1078 | SYSERROR("Failed to make / rslave at startup"); |
f2e07cb6 | 1079 | lxc_free_handler(handler); |
a6b6ad7b | 1080 | ret = 1; |
7cb19d44 | 1081 | goto on_error; |
a8dfe4e0 WB |
1082 | } |
1083 | } | |
1084 | ||
8bee8851 | 1085 | reboot: |
80308d07 | 1086 | if (conf->reboot == REBOOT_INIT) { |
aa460476 | 1087 | /* initialize handler */ |
9640c6a7 | 1088 | handler = lxc_init_handler(c->name, conf, c->config_path, c->daemonize); |
a6b6ad7b CB |
1089 | if (!handler) { |
1090 | ret = 1; | |
7cb19d44 | 1091 | goto on_error; |
a6b6ad7b | 1092 | } |
aa460476 CB |
1093 | } |
1094 | ||
c1a3e547 CB |
1095 | keepfds[0] = handler->conf->maincmd_fd; |
1096 | keepfds[1] = handler->state_socket_pair[0]; | |
1097 | keepfds[2] = handler->state_socket_pair[1]; | |
9640c6a7 | 1098 | ret = lxc_check_inherited(conf, c->daemonize, keepfds, |
c1a3e547 | 1099 | sizeof(keepfds) / sizeof(keepfds[0])); |
7cb19d44 | 1100 | if (ret < 0) { |
f2e07cb6 | 1101 | lxc_free_handler(handler); |
d2cf4c37 | 1102 | ret = 1; |
7cb19d44 | 1103 | goto on_error; |
d2cf4c37 SH |
1104 | } |
1105 | ||
9605460f | 1106 | if (useinit) |
9640c6a7 CB |
1107 | ret = lxc_execute(c->name, argv, 1, handler, c->config_path, |
1108 | c->daemonize, &c->error_num); | |
9605460f | 1109 | else |
9640c6a7 CB |
1110 | ret = lxc_start(c->name, argv, handler, c->config_path, |
1111 | c->daemonize, &c->error_num); | |
72d0e1cb | 1112 | |
80308d07 | 1113 | if (conf->reboot == REBOOT_REQ) { |
7cb19d44 | 1114 | INFO("Container requested reboot"); |
80308d07 | 1115 | conf->reboot = REBOOT_INIT; |
72d0e1cb SG |
1116 | goto reboot; |
1117 | } | |
1118 | ||
7cb19d44 | 1119 | on_error: |
487d8008 QH |
1120 | if (c->pidfile) { |
1121 | unlink(c->pidfile); | |
1122 | free(c->pidfile); | |
1123 | c->pidfile = NULL; | |
1124 | } | |
fd51a89b SH |
1125 | free_init_cmd(init_cmd); |
1126 | ||
9640c6a7 | 1127 | if (c->daemonize && ret != 0) |
d608fbda | 1128 | _exit(EXIT_FAILURE); |
9640c6a7 | 1129 | else if (c->daemonize) |
d608fbda | 1130 | _exit(EXIT_SUCCESS); |
7cb19d44 CB |
1131 | |
1132 | if (ret != 0) | |
1133 | return false; | |
1134 | ||
1135 | return true; | |
72d0e1cb SG |
1136 | } |
1137 | ||
0c14779f CB |
1138 | static bool lxcapi_start(struct lxc_container *c, int useinit, |
1139 | char *const argv[]) | |
858377e4 SH |
1140 | { |
1141 | bool ret; | |
0c14779f | 1142 | |
858377e4 SH |
1143 | current_config = c ? c->lxc_conf : NULL; |
1144 | ret = do_lxcapi_start(c, useinit, argv); | |
1145 | current_config = NULL; | |
0c14779f | 1146 | |
858377e4 SH |
1147 | return ret; |
1148 | } | |
1149 | ||
9f52e331 | 1150 | /* Note, there MUST be an ending NULL. */ |
72d0e1cb SG |
1151 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) |
1152 | { | |
1153 | va_list ap; | |
a0e93eeb | 1154 | char **inargs = NULL; |
72d0e1cb SG |
1155 | bool bret = false; |
1156 | ||
1157 | /* container exists */ | |
1158 | if (!c) | |
1159 | return false; | |
1160 | ||
858377e4 SH |
1161 | current_config = c->lxc_conf; |
1162 | ||
72d0e1cb | 1163 | va_start(ap, useinit); |
a0e93eeb | 1164 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb | 1165 | va_end(ap); |
9f52e331 CB |
1166 | if (!inargs) |
1167 | goto on_error; | |
72d0e1cb | 1168 | |
a0e93eeb | 1169 | /* pass NULL if no arguments were supplied */ |
858377e4 | 1170 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb | 1171 | |
9f52e331 | 1172 | on_error: |
72d0e1cb | 1173 | if (inargs) { |
4e03ae57 | 1174 | char **arg; |
a73846d8 | 1175 | |
4e03ae57 DE |
1176 | for (arg = inargs; *arg; arg++) |
1177 | free(*arg); | |
72d0e1cb SG |
1178 | free(inargs); |
1179 | } | |
1180 | ||
858377e4 | 1181 | current_config = NULL; |
9f52e331 | 1182 | |
72d0e1cb SG |
1183 | return bret; |
1184 | } | |
1185 | ||
858377e4 | 1186 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
1187 | { |
1188 | int ret; | |
1189 | ||
1190 | if (!c) | |
1191 | return false; | |
1192 | ||
ef6e34ee | 1193 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 1194 | |
d775f21b | 1195 | return ret == 0; |
72d0e1cb SG |
1196 | } |
1197 | ||
858377e4 SH |
1198 | WRAP_API(bool, lxcapi_stop) |
1199 | ||
d5752559 SH |
1200 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
1201 | { | |
f5849fd7 | 1202 | __do_free char *p = NULL; |
78d44e5a | 1203 | int lasterr; |
78d44e5a CB |
1204 | int ret = -1; |
1205 | ||
d5752559 SH |
1206 | mode_t mask = umask(0002); |
1207 | ret = mkdir(path, 0770); | |
1208 | lasterr = errno; | |
1209 | umask(mask); | |
1210 | errno = lasterr; | |
1211 | if (ret) { | |
78d44e5a | 1212 | if (errno != EEXIST) |
d5752559 | 1213 | return -1; |
78d44e5a CB |
1214 | |
1215 | ret = 0; | |
d5752559 | 1216 | } |
78d44e5a | 1217 | |
f5849fd7 | 1218 | p = must_copy_string(path); |
cbb9c7c7 | 1219 | |
78d44e5a CB |
1220 | if (!lxc_list_empty(&conf->id_map)) { |
1221 | ret = chown_mapped_root(p, conf); | |
1222 | if (ret < 0) | |
1223 | ret = -1; | |
d5752559 | 1224 | } |
78d44e5a | 1225 | |
d5752559 SH |
1226 | return ret; |
1227 | } | |
1228 | ||
dfa7eaeb | 1229 | /* Create the standard expected container dir. */ |
72d0e1cb SG |
1230 | static bool create_container_dir(struct lxc_container *c) |
1231 | { | |
dfa7eaeb CB |
1232 | int ret; |
1233 | size_t len; | |
72d0e1cb | 1234 | char *s; |
72d0e1cb | 1235 | |
2a59a681 | 1236 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
1237 | s = malloc(len); |
1238 | if (!s) | |
1239 | return false; | |
dfa7eaeb | 1240 | |
2a59a681 | 1241 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
dfa7eaeb | 1242 | if (ret < 0 || (size_t)ret >= len) { |
72d0e1cb SG |
1243 | free(s); |
1244 | return false; | |
1245 | } | |
dfa7eaeb | 1246 | |
d5752559 | 1247 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb | 1248 | free(s); |
dfa7eaeb | 1249 | |
72d0e1cb SG |
1250 | return ret == 0; |
1251 | } | |
1252 | ||
10bc1861 CB |
1253 | /* do_storage_create: thin wrapper around storage_create(). Like |
1254 | * storage_create(), it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 1255 | */ |
10bc1861 CB |
1256 | static struct lxc_storage *do_storage_create(struct lxc_container *c, |
1257 | const char *type, | |
1258 | struct bdev_specs *specs) | |
1897e3bc | 1259 | { |
7a99b5a0 | 1260 | __do_free char *dest = NULL; |
e9e29a33 | 1261 | int ret; |
1897e3bc | 1262 | size_t len; |
10bc1861 | 1263 | struct lxc_storage *bdev; |
1897e3bc | 1264 | |
cd219ae6 | 1265 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
e9e29a33 CB |
1266 | if (c->lxc_conf->rootfs.path && |
1267 | (access(c->lxc_conf->rootfs.path, F_OK) == 0)) { | |
cf465fe4 SH |
1268 | const char *rpath = c->lxc_conf->rootfs.path; |
1269 | len = strlen(rpath) + 1; | |
f5849fd7 | 1270 | dest = must_realloc(NULL, len); |
cf465fe4 | 1271 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 1272 | } else { |
858377e4 | 1273 | const char *lxcpath = do_lxcapi_get_config_path(c); |
1b5d4bd8 | 1274 | len = strlen(c->name) + 1 + strlen(lxcpath) + 1 + strlen(LXC_ROOTFS_DNAME) + 1; |
f5849fd7 | 1275 | dest = must_realloc(NULL, len); |
1b5d4bd8 | 1276 | ret = snprintf(dest, len, "%s/%s/%s", lxcpath, c->name, LXC_ROOTFS_DNAME); |
cd219ae6 | 1277 | } |
e9e29a33 | 1278 | if (ret < 0 || (size_t)ret >= len) |
1897e3bc SH |
1279 | return NULL; |
1280 | ||
10bc1861 | 1281 | bdev = storage_create(dest, type, c->name, specs); |
d44e88c2 | 1282 | if (!bdev) { |
e9e29a33 | 1283 | ERROR("Failed to create \"%s\" storage", type); |
1897e3bc | 1284 | return NULL; |
d44e88c2 SH |
1285 | } |
1286 | ||
7a96a068 | 1287 | if (!c->set_config_item(c, "lxc.rootfs.path", bdev->src)) { |
e9e29a33 | 1288 | ERROR("Failed to set \"lxc.rootfs.path = %s\"", bdev->src); |
8ea91347 | 1289 | storage_put(bdev); |
f7ac4459 CB |
1290 | return NULL; |
1291 | } | |
cf3ef16d | 1292 | |
e9e29a33 CB |
1293 | /* If we are not root, chown the rootfs dir to root in the target user |
1294 | * namespace. | |
f7ac4459 | 1295 | */ |
e9e29a33 CB |
1296 | ret = geteuid(); |
1297 | if (ret != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { | |
1298 | ret = chown_mapped_root(bdev->dest, c->lxc_conf); | |
1299 | if (ret < 0) { | |
1300 | ERROR("Error chowning \"%s\" to container root", bdev->dest); | |
97e9cfa0 | 1301 | suggest_default_idmap(); |
10bc1861 | 1302 | storage_put(bdev); |
cf3ef16d SH |
1303 | return NULL; |
1304 | } | |
1305 | } | |
1306 | ||
1897e3bc SH |
1307 | return bdev; |
1308 | } | |
1309 | ||
85e02f56 PR |
1310 | /* Strip path and return name of file for argv[0] passed to execvp */ |
1311 | static char *lxctemplatefilename(char *tpath) | |
72d0e1cb | 1312 | { |
47e55887 CB |
1313 | char *p; |
1314 | ||
85e02f56 PR |
1315 | p = tpath + strlen(tpath) - 1; |
1316 | while ( (p-1) >= tpath && *(p-1) != '/') | |
96b3cb40 | 1317 | p--; |
47e55887 | 1318 | |
96b3cb40 SH |
1319 | return p; |
1320 | } | |
72d0e1cb | 1321 | |
47e55887 CB |
1322 | static bool create_run_template(struct lxc_container *c, char *tpath, |
1323 | bool need_null_stdfds, char *const argv[]) | |
96b3cb40 | 1324 | { |
47e55887 | 1325 | int ret; |
96b3cb40 | 1326 | pid_t pid; |
72d0e1cb | 1327 | |
72d0e1cb | 1328 | if (!tpath) |
96b3cb40 | 1329 | return true; |
72d0e1cb SG |
1330 | |
1331 | pid = fork(); | |
1332 | if (pid < 0) { | |
7e34710e | 1333 | SYSERROR("Failed to fork task for container creation template"); |
96b3cb40 | 1334 | return false; |
72d0e1cb SG |
1335 | } |
1336 | ||
1a0e70ac | 1337 | if (pid == 0) { /* child */ |
47e55887 CB |
1338 | int i, len; |
1339 | char *namearg, *patharg, *rootfsarg; | |
96b3cb40 | 1340 | char **newargv; |
47e55887 CB |
1341 | int nargs = 0; |
1342 | struct lxc_storage *bdev = NULL; | |
cf3ef16d | 1343 | struct lxc_conf *conf = c->lxc_conf; |
47e55887 | 1344 | uid_t euid; |
72d0e1cb | 1345 | |
47e55887 CB |
1346 | if (need_null_stdfds) { |
1347 | ret = null_stdfds(); | |
1348 | if (ret < 0) | |
1349 | _exit(EXIT_FAILURE); | |
dc23c1c8 | 1350 | } |
1897e3bc | 1351 | |
8a388ed4 | 1352 | bdev = storage_init(c->lxc_conf); |
1897e3bc | 1353 | if (!bdev) { |
47e55887 | 1354 | ERROR("Failed to initialize storage"); |
7e34710e | 1355 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1356 | } |
1357 | ||
47e55887 CB |
1358 | euid = geteuid(); |
1359 | if (euid == 0) { | |
1360 | ret = unshare(CLONE_NEWNS); | |
1361 | if (ret < 0) { | |
1362 | ERROR("Failed to unshare CLONE_NEWNS"); | |
7e34710e | 1363 | _exit(EXIT_FAILURE); |
cf3ef16d | 1364 | } |
47e55887 CB |
1365 | |
1366 | ret = detect_shared_rootfs(); | |
1367 | if (ret == 1) { | |
1368 | ret = mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL); | |
1369 | if (ret < 0) { | |
1370 | SYSERROR("Failed to make \"/\" rslave"); | |
4de2791f SH |
1371 | ERROR("Continuing..."); |
1372 | } | |
1373 | } | |
1374 | } | |
47e55887 CB |
1375 | |
1376 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "btrfs") != 0) { | |
1377 | if (euid != 0) { | |
1378 | ERROR("Unprivileged users can only create " | |
1379 | "btrfs and directory-backed containers"); | |
eb70aaf0 | 1380 | _exit(EXIT_FAILURE); |
4de2791f | 1381 | } |
241978fa | 1382 | |
47e55887 CB |
1383 | if (strcmp(bdev->type, "overlay") == 0 || |
1384 | strcmp(bdev->type, "overlayfs") == 0) { | |
241978fa CB |
1385 | /* If we create an overlay container we need to |
1386 | * rsync the contents into | |
1387 | * <container-path>/<container-name>/rootfs. | |
1388 | * However, the overlay mount function will | |
f073d460 | 1389 | * mount |
241978fa CB |
1390 | * <container-path>/<container-name>/delta0 |
1391 | * over | |
1392 | * <container-path>/<container-name>/rootfs | |
1393 | * which means we would rsync the rootfs into | |
1394 | * the delta directory. That doesn't make sense | |
1395 | * since the delta directory only exists to | |
1396 | * record the differences to | |
1397 | * <container-path>/<container-name>/rootfs. So | |
1398 | * let's simply bind-mount here and then rsync | |
1399 | * directly into | |
1400 | * <container-path>/<container-name>/rootfs. | |
1401 | */ | |
1402 | char *src; | |
1403 | ||
1404 | src = ovl_get_rootfs(bdev->src, &(size_t){0}); | |
1405 | if (!src) { | |
1406 | ERROR("Failed to get rootfs"); | |
eb70aaf0 | 1407 | _exit(EXIT_FAILURE); |
241978fa CB |
1408 | } |
1409 | ||
1410 | ret = mount(src, bdev->dest, "bind", MS_BIND | MS_REC, NULL); | |
1411 | if (ret < 0) { | |
1412 | ERROR("Failed to mount rootfs"); | |
8f55c742 | 1413 | _exit(EXIT_FAILURE); |
241978fa CB |
1414 | } |
1415 | } else { | |
47e55887 CB |
1416 | ret = bdev->ops->mount(bdev); |
1417 | if (ret < 0) { | |
241978fa | 1418 | ERROR("Failed to mount rootfs"); |
eb70aaf0 | 1419 | _exit(EXIT_FAILURE); |
241978fa | 1420 | } |
cf3ef16d | 1421 | } |
1a0e70ac | 1422 | } else { /* TODO come up with a better way here! */ |
41dc7155 | 1423 | const char *src; |
f10fad2f | 1424 | free(bdev->dest); |
e9705550 CB |
1425 | src = lxc_storage_get_path(bdev->src, bdev->type); |
1426 | bdev->dest = strdup(src); | |
1897e3bc SH |
1427 | } |
1428 | ||
47e55887 CB |
1429 | /* Create our new array, pre-pend the template name and base |
1430 | * args. | |
72d0e1cb SG |
1431 | */ |
1432 | if (argv) | |
a73846d8 | 1433 | for (nargs = 0; argv[nargs]; nargs++) |
47e55887 | 1434 | ; |
a73846d8 | 1435 | |
47e55887 CB |
1436 | /* template, path, rootfs and name args */ |
1437 | nargs += 4; | |
cf3ef16d | 1438 | |
72d0e1cb SG |
1439 | newargv = malloc(nargs * sizeof(*newargv)); |
1440 | if (!newargv) | |
7e34710e | 1441 | _exit(EXIT_FAILURE); |
85e02f56 | 1442 | newargv[0] = lxctemplatefilename(tpath); |
72d0e1cb | 1443 | |
47e55887 | 1444 | /* --path */ |
2a59a681 | 1445 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1446 | patharg = malloc(len); |
1447 | if (!patharg) | |
7e34710e | 1448 | _exit(EXIT_FAILURE); |
a73846d8 | 1449 | |
2a59a681 | 1450 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb | 1451 | if (ret < 0 || ret >= len) |
7e34710e | 1452 | _exit(EXIT_FAILURE); |
72d0e1cb | 1453 | newargv[1] = patharg; |
47e55887 CB |
1454 | |
1455 | /* --name */ | |
72d0e1cb SG |
1456 | len = strlen("--name=") + strlen(c->name) + 1; |
1457 | namearg = malloc(len); | |
1458 | if (!namearg) | |
7e34710e | 1459 | _exit(EXIT_FAILURE); |
a73846d8 | 1460 | |
72d0e1cb SG |
1461 | ret = snprintf(namearg, len, "--name=%s", c->name); |
1462 | if (ret < 0 || ret >= len) | |
7e34710e | 1463 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1464 | newargv[2] = namearg; |
1465 | ||
47e55887 | 1466 | /* --rootfs */ |
1897e3bc SH |
1467 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1468 | rootfsarg = malloc(len); | |
1469 | if (!rootfsarg) | |
7e34710e | 1470 | _exit(EXIT_FAILURE); |
a73846d8 | 1471 | |
1897e3bc SH |
1472 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); |
1473 | if (ret < 0 || ret >= len) | |
7e34710e | 1474 | _exit(EXIT_FAILURE); |
1897e3bc SH |
1475 | newargv[3] = rootfsarg; |
1476 | ||
72d0e1cb SG |
1477 | /* add passed-in args */ |
1478 | if (argv) | |
1897e3bc | 1479 | for (i = 4; i < nargs; i++) |
47e55887 | 1480 | newargv[i] = argv[i - 4]; |
72d0e1cb SG |
1481 | |
1482 | /* add trailing NULL */ | |
1483 | nargs++; | |
1484 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1485 | if (!newargv) | |
7e34710e | 1486 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1487 | newargv[nargs - 1] = NULL; |
1488 | ||
47e55887 CB |
1489 | /* If we're running the template in a mapped userns, then we |
1490 | * prepend the template command with: lxc-usernsexec <-m map1> | |
1491 | * ... <-m mapn> -- and we append "--mapped-uid x", where x is | |
1492 | * the mapped uid for our geteuid() | |
cf3ef16d | 1493 | */ |
0e6e3a41 | 1494 | if (!lxc_list_empty(&conf->id_map)) { |
47e55887 CB |
1495 | int extraargs, hostuid_mapped, hostgid_mapped; |
1496 | char **n2; | |
1497 | char txtuid[20], txtgid[20]; | |
cf3ef16d SH |
1498 | struct lxc_list *it; |
1499 | struct id_map *map; | |
47e55887 | 1500 | int n2args = 1; |
cf3ef16d | 1501 | |
47e55887 CB |
1502 | n2 = malloc(n2args * sizeof(*n2)); |
1503 | if (!n2) | |
7e34710e | 1504 | _exit(EXIT_FAILURE); |
47e55887 | 1505 | |
cf3ef16d SH |
1506 | newargv[0] = tpath; |
1507 | tpath = "lxc-usernsexec"; | |
1508 | n2[0] = "lxc-usernsexec"; | |
a73846d8 | 1509 | |
cf3ef16d SH |
1510 | lxc_list_for_each(it, &conf->id_map) { |
1511 | map = it->elem; | |
1512 | n2args += 2; | |
57d116ab | 1513 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d | 1514 | if (!n2) |
7e34710e | 1515 | _exit(EXIT_FAILURE); |
47e55887 CB |
1516 | |
1517 | n2[n2args - 2] = "-m"; | |
1518 | n2[n2args - 1] = malloc(200); | |
1519 | if (!n2[n2args - 1]) | |
7e34710e | 1520 | _exit(EXIT_FAILURE); |
47e55887 CB |
1521 | |
1522 | ret = snprintf(n2[n2args - 1], 200, "%c:%lu:%lu:%lu", | |
1523 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1524 | map->nsid, map->hostid, map->range); | |
cf3ef16d | 1525 | if (ret < 0 || ret >= 200) |
7e34710e | 1526 | _exit(EXIT_FAILURE); |
cf3ef16d | 1527 | } |
47e55887 CB |
1528 | |
1529 | hostuid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); | |
1530 | extraargs = hostuid_mapped >= 0 ? 1 : 3; | |
a73846d8 | 1531 | |
57d116ab | 1532 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d | 1533 | if (!n2) |
7e34710e | 1534 | _exit(EXIT_FAILURE); |
47e55887 CB |
1535 | |
1536 | if (hostuid_mapped < 0) { | |
1537 | hostuid_mapped = find_unmapped_nsid(conf, ID_TYPE_UID); | |
cf3ef16d | 1538 | n2[n2args++] = "-m"; |
47e55887 CB |
1539 | if (hostuid_mapped < 0) { |
1540 | ERROR("Failed to find free uid to map"); | |
7e34710e | 1541 | _exit(EXIT_FAILURE); |
cf3ef16d | 1542 | } |
47e55887 | 1543 | |
cf3ef16d | 1544 | n2[n2args++] = malloc(200); |
47e55887 | 1545 | if (!n2[n2args - 1]) { |
cf3ef16d | 1546 | SYSERROR("out of memory"); |
7e34710e | 1547 | _exit(EXIT_FAILURE); |
cf3ef16d | 1548 | } |
a73846d8 | 1549 | |
47e55887 CB |
1550 | ret = snprintf(n2[n2args - 1], 200, "u:%d:%d:1", |
1551 | hostuid_mapped, geteuid()); | |
1552 | if (ret < 0 || ret >= 200) | |
7e34710e | 1553 | _exit(EXIT_FAILURE); |
cf3ef16d | 1554 | } |
47e55887 CB |
1555 | |
1556 | hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); | |
2133f58c | 1557 | extraargs = hostgid_mapped >= 0 ? 1 : 3; |
a73846d8 | 1558 | |
2133f58c SH |
1559 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
1560 | if (!n2) | |
7e34710e | 1561 | _exit(EXIT_FAILURE); |
47e55887 | 1562 | |
2133f58c | 1563 | if (hostgid_mapped < 0) { |
339efad9 | 1564 | hostgid_mapped = find_unmapped_nsid(conf, ID_TYPE_GID); |
2133f58c SH |
1565 | n2[n2args++] = "-m"; |
1566 | if (hostgid_mapped < 0) { | |
47e55887 | 1567 | ERROR("Failed to find free gid to map"); |
7e34710e | 1568 | _exit(EXIT_FAILURE); |
2133f58c | 1569 | } |
47e55887 | 1570 | |
2133f58c | 1571 | n2[n2args++] = malloc(200); |
47e55887 | 1572 | if (!n2[n2args - 1]) { |
2133f58c | 1573 | SYSERROR("out of memory"); |
7e34710e | 1574 | _exit(EXIT_FAILURE); |
2133f58c | 1575 | } |
47e55887 CB |
1576 | |
1577 | ret = snprintf(n2[n2args - 1], 200, "g:%d:%d:1", | |
1578 | hostgid_mapped, getegid()); | |
1579 | if (ret < 0 || ret >= 200) | |
7e34710e | 1580 | _exit(EXIT_FAILURE); |
2133f58c | 1581 | } |
a73846d8 | 1582 | |
cf3ef16d | 1583 | n2[n2args++] = "--"; |
a73846d8 | 1584 | |
cf3ef16d SH |
1585 | for (i = 0; i < nargs; i++) |
1586 | n2[i + n2args] = newargv[i]; | |
57d116ab | 1587 | n2args += nargs; |
47e55887 CB |
1588 | |
1589 | /* Finally add "--mapped-uid $uid" to tell template what | |
1590 | * to chown cached images to. | |
1a0e70ac | 1591 | */ |
2133f58c | 1592 | n2args += 4; |
57d116ab | 1593 | n2 = realloc(n2, n2args * sizeof(char *)); |
47e55887 | 1594 | if (!n2) |
7e34710e | 1595 | _exit(EXIT_FAILURE); |
47e55887 | 1596 | |
1a0e70ac | 1597 | /* note n2[n2args-1] is NULL */ |
47e55887 | 1598 | n2[n2args - 5] = "--mapped-uid"; |
4250ef64 CB |
1599 | |
1600 | ret = snprintf(txtuid, 20, "%d", hostuid_mapped); | |
1601 | if (ret < 0 || ret >= 20) { | |
1602 | free(newargv); | |
1603 | free(n2); | |
1604 | _exit(EXIT_FAILURE); | |
1605 | } | |
1606 | ||
47e55887 CB |
1607 | n2[n2args - 4] = txtuid; |
1608 | n2[n2args - 3] = "--mapped-gid"; | |
4250ef64 | 1609 | |
1f080b1d CB |
1610 | ret = snprintf(txtgid, 20, "%d", hostgid_mapped); |
1611 | if (ret < 0 || ret >= 20) { | |
1612 | free(newargv); | |
1613 | free(n2); | |
1614 | _exit(EXIT_FAILURE); | |
1615 | } | |
4250ef64 | 1616 | |
47e55887 CB |
1617 | n2[n2args - 2] = txtgid; |
1618 | n2[n2args - 1] = NULL; | |
cf3ef16d SH |
1619 | free(newargv); |
1620 | newargv = n2; | |
1621 | } | |
47e55887 | 1622 | |
cf3ef16d | 1623 | execvp(tpath, newargv); |
e9705550 | 1624 | SYSERROR("Failed to execute template %s", tpath); |
7e34710e | 1625 | _exit(EXIT_FAILURE); |
72d0e1cb SG |
1626 | } |
1627 | ||
47e55887 CB |
1628 | ret = wait_for_pid(pid); |
1629 | if (ret != 0) { | |
1630 | ERROR("Failed to create container from template"); | |
96b3cb40 SH |
1631 | return false; |
1632 | } | |
1633 | ||
1634 | return true; | |
1635 | } | |
1636 | ||
74a3920a | 1637 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1638 | { |
1fd9bd50 | 1639 | long flen; |
630ac7c6 | 1640 | size_t len; |
b4569e93 | 1641 | char *contents; |
3ce74686 | 1642 | FILE *f; |
025ed0f3 | 1643 | int ret = -1; |
fa2bb6ba | 1644 | #if HAVE_OPENSSL |
7c3d3976 JF |
1645 | int i; |
1646 | unsigned int md_len = 0; | |
fa2bb6ba | 1647 | unsigned char md_value[EVP_MAX_MD_SIZE]; |
b4569e93 | 1648 | char *tpath; |
52026772 | 1649 | #endif |
3ce74686 | 1650 | |
4110345b | 1651 | f = fopen(path, "re"); |
025ed0f3 | 1652 | if (f == NULL) |
3ce74686 | 1653 | return false; |
025ed0f3 | 1654 | |
630ac7c6 CB |
1655 | ret = fseek(f, 0, SEEK_END); |
1656 | if (ret < 0) | |
025ed0f3 | 1657 | goto out_error; |
630ac7c6 CB |
1658 | |
1659 | ret = -1; | |
1660 | flen = ftell(f); | |
1661 | if (flen < 0) | |
025ed0f3 | 1662 | goto out_error; |
630ac7c6 CB |
1663 | |
1664 | ret = fseek(f, 0, SEEK_SET); | |
1665 | if (ret < 0) | |
025ed0f3 | 1666 | goto out_error; |
630ac7c6 CB |
1667 | |
1668 | ret = fseek(f, 0, SEEK_SET); | |
1669 | if (ret < 0) | |
1670 | goto out_error; | |
1671 | ||
1672 | ret = -1; | |
1673 | contents = malloc(flen + 1); | |
1674 | if (!contents) | |
025ed0f3 | 1675 | goto out_error; |
630ac7c6 CB |
1676 | |
1677 | len = fread(contents, 1, flen, f); | |
1678 | if (len != flen) | |
025ed0f3 SH |
1679 | goto out_free_contents; |
1680 | ||
3ce74686 | 1681 | contents[flen] = '\0'; |
a73846d8 | 1682 | |
025ed0f3 | 1683 | ret = fclose(f); |
025ed0f3 SH |
1684 | f = NULL; |
1685 | if (ret < 0) | |
1686 | goto out_free_contents; | |
3ce74686 | 1687 | |
fa2bb6ba | 1688 | #if HAVE_OPENSSL |
01efd4d3 | 1689 | tpath = get_template_path(t); |
85db5535 | 1690 | if (!tpath) { |
630ac7c6 | 1691 | ERROR("Invalid template \"%s\" specified", t); |
025ed0f3 | 1692 | goto out_free_contents; |
3ce74686 SH |
1693 | } |
1694 | ||
fa2bb6ba | 1695 | ret = sha1sum_file(tpath, md_value, &md_len); |
85db5535 | 1696 | if (ret < 0) { |
630ac7c6 | 1697 | ERROR("Failed to get sha1sum of %s", tpath); |
cef701ed | 1698 | free(tpath); |
85db5535 | 1699 | goto out_free_contents; |
3ce74686 | 1700 | } |
cef701ed | 1701 | free(tpath); |
3ce74686 SH |
1702 | #endif |
1703 | ||
4110345b | 1704 | f = fopen(path, "we"); |
025ed0f3 | 1705 | if (f == NULL) { |
630ac7c6 | 1706 | SYSERROR("Reopening config for writing"); |
3ce74686 SH |
1707 | free(contents); |
1708 | return false; | |
1709 | } | |
630ac7c6 | 1710 | |
3ce74686 SH |
1711 | fprintf(f, "# Template used to create this container: %s\n", t); |
1712 | if (argv) { | |
1713 | fprintf(f, "# Parameters passed to the template:"); | |
1714 | while (*argv) { | |
1715 | fprintf(f, " %s", *argv); | |
1716 | argv++; | |
1717 | } | |
1718 | fprintf(f, "\n"); | |
1719 | } | |
a73846d8 | 1720 | |
fa2bb6ba | 1721 | #if HAVE_OPENSSL |
56698177 | 1722 | fprintf(f, "# Template script checksum (SHA-1): "); |
fa2bb6ba | 1723 | for (i=0; i<md_len; i++) |
56698177 SH |
1724 | fprintf(f, "%02x", md_value[i]); |
1725 | fprintf(f, "\n"); | |
3ce74686 | 1726 | #endif |
0520c252 | 1727 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
49a2ed80 SH |
1728 | fprintf(f, "\n# Uncomment the following line to support nesting containers:\n"); |
1729 | fprintf(f, "#lxc.include = " LXCTEMPLATECONFIG "/nesting.conf\n"); | |
1730 | fprintf(f, "# (Be aware this has security implications)\n\n"); | |
3ce74686 SH |
1731 | if (fwrite(contents, 1, flen, f) != flen) { |
1732 | SYSERROR("Writing original contents"); | |
1733 | free(contents); | |
1734 | fclose(f); | |
1735 | return false; | |
1736 | } | |
630ac7c6 | 1737 | |
025ed0f3 | 1738 | ret = 0; |
630ac7c6 | 1739 | |
025ed0f3 | 1740 | out_free_contents: |
3ce74686 | 1741 | free(contents); |
630ac7c6 | 1742 | |
025ed0f3 SH |
1743 | out_error: |
1744 | if (f) { | |
1745 | int newret; | |
025ed0f3 | 1746 | newret = fclose(f); |
025ed0f3 SH |
1747 | if (ret == 0) |
1748 | ret = newret; | |
1749 | } | |
630ac7c6 | 1750 | |
025ed0f3 SH |
1751 | if (ret < 0) { |
1752 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1753 | return false; |
1754 | } | |
630ac7c6 | 1755 | |
3ce74686 SH |
1756 | return true; |
1757 | } | |
1758 | ||
4df7f012 SH |
1759 | static void lxcapi_clear_config(struct lxc_container *c) |
1760 | { | |
e62fd16f CB |
1761 | if (!c || !c->lxc_conf) |
1762 | return; | |
1763 | ||
1764 | lxc_conf_free(c->lxc_conf); | |
1765 | c->lxc_conf = NULL; | |
4df7f012 SH |
1766 | } |
1767 | ||
858377e4 SH |
1768 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1769 | ||
96b3cb40 SH |
1770 | /* |
1771 | * lxcapi_create: | |
1772 | * create a container with the given parameters. | |
1773 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1774 | * configuration already set | |
1775 | * @t: the template to execute to instantiate the root filesystem and | |
1776 | * adjust the configuration. | |
1777 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1778 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1779 | * use. | |
1780 | * | |
1781 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1782 | * arguments, you can just pass NULL. | |
1783 | */ | |
858377e4 | 1784 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
85aec4ac CB |
1785 | const char *bdevtype, struct bdev_specs *specs, |
1786 | int flags, char *const argv[]) | |
96b3cb40 | 1787 | { |
e9e29a33 | 1788 | int partial_fd; |
51f0f73b | 1789 | mode_t mask; |
96b3cb40 | 1790 | pid_t pid; |
92fa4347 | 1791 | bool ret = false, rootfs_managed = true; |
85db5535 | 1792 | char *tpath = NULL; |
96b3cb40 SH |
1793 | |
1794 | if (!c) | |
1795 | return false; | |
1796 | ||
85db5535 DE |
1797 | if (t) { |
1798 | tpath = get_template_path(t); | |
1799 | if (!tpath) { | |
e9e29a33 | 1800 | ERROR("Unknown template \"%s\"", t); |
85db5535 DE |
1801 | goto out; |
1802 | } | |
96b3cb40 SH |
1803 | } |
1804 | ||
e9e29a33 CB |
1805 | /* If a template is passed in, and the rootfs already is defined in the |
1806 | * container config and exists, then the caller is trying to create an | |
1807 | * existing container. Return an error, but do NOT delete the container. | |
cf465fe4 | 1808 | */ |
858377e4 | 1809 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
a73846d8 | 1810 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
e9e29a33 CB |
1811 | ERROR("Container \"%s\" already exists in \"%s\"", c->name, |
1812 | c->config_path); | |
6c6892b5 | 1813 | goto free_tpath; |
cf465fe4 SH |
1814 | } |
1815 | ||
6c6892b5 | 1816 | if (!c->lxc_conf) { |
858377e4 | 1817 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
e9e29a33 CB |
1818 | ERROR("Error loading default configuration file %s", |
1819 | lxc_global_config_value("lxc.default_config")); | |
6c6892b5 DE |
1820 | goto free_tpath; |
1821 | } | |
96b3cb40 SH |
1822 | } |
1823 | ||
6c6892b5 DE |
1824 | if (!create_container_dir(c)) |
1825 | goto free_tpath; | |
1826 | ||
92fa4347 CB |
1827 | if (c->lxc_conf->rootfs.path) |
1828 | rootfs_managed = false; | |
1829 | ||
e9e29a33 CB |
1830 | /* If both template and rootfs.path are set, template is setup as |
1831 | * rootfs.path. The container is already created if we have a config and | |
1832 | * rootfs.path is accessible | |
0590e82c | 1833 | */ |
00370edd | 1834 | if (!c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 | 1835 | /* No template passed in and rootfs does not exist. */ |
00370edd | 1836 | if (!c->save_config(c, NULL)) { |
e9e29a33 | 1837 | ERROR("Failed to save initial config for \"%s\"", c->name); |
00370edd DW |
1838 | goto out; |
1839 | } | |
1840 | ret = true; | |
0590e82c | 1841 | goto out; |
00370edd | 1842 | } |
e9e29a33 CB |
1843 | |
1844 | /* Rootfs passed into configuration, but does not exist. */ | |
0590e82c | 1845 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
0590e82c | 1846 | goto out; |
e9e29a33 | 1847 | |
858377e4 | 1848 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
e9e29a33 CB |
1849 | /* Rootfs already existed, user just wanted to save the loaded |
1850 | * configuration. | |
1851 | */ | |
0f4cdd77 | 1852 | if (!c->save_config(c, NULL)) |
e9e29a33 | 1853 | ERROR("Failed to save initial config for \"%s\"", c->name); |
a73846d8 | 1854 | |
0590e82c SH |
1855 | ret = true; |
1856 | goto out; | |
a69aad27 | 1857 | } |
96b3cb40 SH |
1858 | |
1859 | /* Mark that this container is being created */ | |
e9e29a33 CB |
1860 | partial_fd = create_partial(c); |
1861 | if (partial_fd < 0) | |
96b3cb40 SH |
1862 | goto out; |
1863 | ||
e9e29a33 | 1864 | /* No need to get disk lock bc we have the partial lock. */ |
96b3cb40 | 1865 | |
51f0f73b KR |
1866 | mask = umask(0022); |
1867 | ||
e9e29a33 | 1868 | /* Create the storage. |
96b3cb40 SH |
1869 | * Note we can't do this in the same task as we use to execute the |
1870 | * template because of the way zfs works. | |
1871 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1872 | * namespace. | |
1873 | */ | |
1874 | pid = fork(); | |
1875 | if (pid < 0) { | |
e9e29a33 | 1876 | SYSERROR("Failed to fork task for container creation template"); |
8eb5694b SH |
1877 | goto out_unlock; |
1878 | } | |
1879 | ||
1a0e70ac | 1880 | if (pid == 0) { /* child */ |
10bc1861 | 1881 | struct lxc_storage *bdev = NULL; |
96b3cb40 | 1882 | |
10bc1861 CB |
1883 | bdev = do_storage_create(c, bdevtype, specs); |
1884 | if (!bdev) { | |
e9e29a33 CB |
1885 | ERROR("Failed to create %s storage for %s", |
1886 | bdevtype ? bdevtype : "(none)", c->name); | |
85aec4ac | 1887 | _exit(EXIT_FAILURE); |
96b3cb40 SH |
1888 | } |
1889 | ||
e9e29a33 | 1890 | /* Save config file again to store the new rootfs location. */ |
858377e4 | 1891 | if (!do_lxcapi_save_config(c, NULL)) { |
e9e29a33 CB |
1892 | ERROR("Failed to save initial config for %s", c->name); |
1893 | /* Parent task won't see the storage driver in the | |
1894 | * config so we delete it. | |
1895 | */ | |
96b3cb40 SH |
1896 | bdev->ops->umount(bdev); |
1897 | bdev->ops->destroy(bdev); | |
85aec4ac | 1898 | _exit(EXIT_FAILURE); |
96b3cb40 | 1899 | } |
a73846d8 | 1900 | |
85aec4ac | 1901 | _exit(EXIT_SUCCESS); |
96b3cb40 | 1902 | } |
a73846d8 | 1903 | |
96b3cb40 | 1904 | if (wait_for_pid(pid) != 0) |
a09295f8 | 1905 | goto out_unlock; |
96b3cb40 | 1906 | |
e9e29a33 | 1907 | /* Reload config to get the rootfs. */ |
a3b47c09 | 1908 | lxc_conf_free(c->lxc_conf); |
96b3cb40 | 1909 | c->lxc_conf = NULL; |
a73846d8 | 1910 | |
96b3cb40 | 1911 | if (!load_config_locked(c, c->configfile)) |
a09295f8 | 1912 | goto out_unlock; |
96b3cb40 | 1913 | |
dc23c1c8 | 1914 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1915 | goto out_unlock; |
1916 | ||
1a0e70ac CB |
1917 | /* Now clear out the lxc_conf we have, reload from the created |
1918 | * container. | |
1919 | */ | |
858377e4 | 1920 | do_lxcapi_clear_config(c); |
3ce74686 | 1921 | |
9d65a487 KY |
1922 | if (t) { |
1923 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
e9e29a33 | 1924 | ERROR("Failed to prepend header to config file"); |
9d65a487 KY |
1925 | goto out_unlock; |
1926 | } | |
3ce74686 | 1927 | } |
a73846d8 | 1928 | |
a69aad27 | 1929 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1930 | |
1931 | out_unlock: | |
51f0f73b | 1932 | umask(mask); |
b20e0599 | 1933 | remove_partial(c, partial_fd); |
a73846d8 | 1934 | |
72d0e1cb | 1935 | out: |
92fa4347 CB |
1936 | if (!ret) { |
1937 | bool reset_managed = c->lxc_conf->rootfs.managed; | |
1938 | ||
1939 | /* | |
1940 | * Ensure that we don't destroy storage we didn't create | |
1941 | * ourselves. | |
1942 | */ | |
1943 | if (!rootfs_managed) | |
1944 | c->lxc_conf->rootfs.managed = false; | |
17a367d8 | 1945 | container_destroy(c, NULL); |
92fa4347 CB |
1946 | c->lxc_conf->rootfs.managed = reset_managed; |
1947 | } | |
a73846d8 | 1948 | |
6c6892b5 | 1949 | free_tpath: |
f10fad2f | 1950 | free(tpath); |
a69aad27 | 1951 | return ret; |
72d0e1cb SG |
1952 | } |
1953 | ||
858377e4 | 1954 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
e9e29a33 CB |
1955 | const char *bdevtype, struct bdev_specs *specs, |
1956 | int flags, char *const argv[]) | |
858377e4 SH |
1957 | { |
1958 | bool ret; | |
a73846d8 | 1959 | |
858377e4 | 1960 | current_config = c ? c->lxc_conf : NULL; |
a73846d8 | 1961 | |
858377e4 SH |
1962 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); |
1963 | current_config = NULL; | |
1964 | return ret; | |
1965 | } | |
1966 | ||
1967 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d | 1968 | { |
9dd54153 | 1969 | int ret; |
3e625e2d | 1970 | pid_t pid; |
dd267776 | 1971 | int rebootsignal = SIGINT; |
3e625e2d SH |
1972 | |
1973 | if (!c) | |
1974 | return false; | |
9dd54153 | 1975 | |
858377e4 | 1976 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1977 | return false; |
9dd54153 | 1978 | |
858377e4 | 1979 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1980 | if (pid <= 0) |
1981 | return false; | |
9dd54153 | 1982 | |
dd267776 BP |
1983 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1984 | rebootsignal = c->lxc_conf->rebootsignal; | |
9dd54153 CB |
1985 | |
1986 | ret = kill(pid, rebootsignal); | |
1987 | if (ret < 0) { | |
1988 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); | |
3e625e2d | 1989 | return false; |
591614a7 | 1990 | } |
3e625e2d | 1991 | |
9dd54153 | 1992 | return true; |
3e625e2d SH |
1993 | } |
1994 | ||
858377e4 SH |
1995 | WRAP_API(bool, lxcapi_reboot) |
1996 | ||
d39b10eb CB |
1997 | static bool do_lxcapi_reboot2(struct lxc_container *c, int timeout) |
1998 | { | |
1999 | int killret, ret; | |
2000 | pid_t pid; | |
2001 | int rebootsignal = SIGINT, state_client_fd = -1; | |
2002 | lxc_state_t states[MAX_STATE] = {0}; | |
2003 | ||
2004 | if (!c) | |
2005 | return false; | |
2006 | ||
2007 | if (!do_lxcapi_is_running(c)) | |
2008 | return true; | |
2009 | ||
2010 | pid = do_lxcapi_init_pid(c); | |
2011 | if (pid <= 0) | |
2012 | return true; | |
2013 | ||
2014 | if (c->lxc_conf && c->lxc_conf->rebootsignal) | |
2015 | rebootsignal = c->lxc_conf->rebootsignal; | |
2016 | ||
2017 | /* Add a new state client before sending the shutdown signal so that we | |
2018 | * don't miss a state. | |
2019 | */ | |
2020 | if (timeout != 0) { | |
2021 | states[RUNNING] = 2; | |
2022 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2023 | &state_client_fd); | |
2024 | if (ret < 0) | |
2025 | return false; | |
2026 | ||
2027 | if (state_client_fd < 0) | |
2028 | return false; | |
2029 | ||
2030 | if (ret == RUNNING) | |
2031 | return true; | |
2032 | ||
2033 | if (ret < MAX_STATE) | |
2034 | return false; | |
2035 | } | |
2036 | ||
2037 | /* Send reboot signal to container. */ | |
2038 | killret = kill(pid, rebootsignal); | |
2039 | if (killret < 0) { | |
d39b10eb CB |
2040 | if (state_client_fd >= 0) |
2041 | close(state_client_fd); | |
a73846d8 | 2042 | |
9dd54153 | 2043 | WARN("Failed to send signal %d to pid %d", rebootsignal, pid); |
d39b10eb CB |
2044 | return false; |
2045 | } | |
2046 | TRACE("Sent signal %d to pid %d", rebootsignal, pid); | |
2047 | ||
a579fa51 | 2048 | if (timeout == 0) |
d39b10eb CB |
2049 | return true; |
2050 | ||
2051 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2052 | close(state_client_fd); | |
2053 | if (ret < 0) | |
2054 | return false; | |
2055 | ||
2056 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2057 | if (ret != RUNNING) | |
2058 | return false; | |
2059 | ||
2060 | return true; | |
2061 | } | |
2062 | ||
2063 | WRAP_API_1(bool, lxcapi_reboot2, int) | |
2064 | ||
858377e4 | 2065 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) |
72d0e1cb | 2066 | { |
f8bdb6dc | 2067 | int killret, ret; |
72d0e1cb | 2068 | pid_t pid; |
9dd54153 | 2069 | int haltsignal = SIGPWR, state_client_fd = -EBADF; |
92e35018 | 2070 | lxc_state_t states[MAX_STATE] = {0}; |
72d0e1cb SG |
2071 | |
2072 | if (!c) | |
2073 | return false; | |
2074 | ||
858377e4 | 2075 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 2076 | return true; |
f8bdb6dc | 2077 | |
858377e4 | 2078 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
2079 | if (pid <= 0) |
2080 | return true; | |
330ae3d3 CB |
2081 | |
2082 | /* Detect whether we should send SIGRTMIN + 3 (e.g. systemd). */ | |
b0227444 | 2083 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 | 2084 | haltsignal = c->lxc_conf->haltsignal; |
573ad77f | 2085 | else if (task_blocks_signal(pid, (SIGRTMIN + 3))) |
eabf1ea9 | 2086 | haltsignal = (SIGRTMIN + 3); |
330ae3d3 | 2087 | |
92e35018 CB |
2088 | /* Add a new state client before sending the shutdown signal so that we |
2089 | * don't miss a state. | |
2090 | */ | |
f8bdb6dc CB |
2091 | if (timeout != 0) { |
2092 | states[STOPPED] = 1; | |
2093 | ret = lxc_cmd_add_state_client(c->name, c->config_path, states, | |
2094 | &state_client_fd); | |
2095 | if (ret < 0) | |
2096 | return false; | |
92e35018 | 2097 | |
f8bdb6dc CB |
2098 | if (state_client_fd < 0) |
2099 | return false; | |
2100 | ||
2101 | if (ret == STOPPED) | |
2102 | return true; | |
591614a7 | 2103 | |
f8bdb6dc | 2104 | if (ret < MAX_STATE) |
92e35018 | 2105 | return false; |
92e35018 CB |
2106 | } |
2107 | ||
f8bdb6dc CB |
2108 | /* Send shutdown signal to container. */ |
2109 | killret = kill(pid, haltsignal); | |
2110 | if (killret < 0) { | |
f8bdb6dc CB |
2111 | if (state_client_fd >= 0) |
2112 | close(state_client_fd); | |
a73846d8 | 2113 | |
9dd54153 | 2114 | WARN("Failed to send signal %d to pid %d", haltsignal, pid); |
f8bdb6dc CB |
2115 | return false; |
2116 | } | |
2117 | TRACE("Sent signal %d to pid %d", haltsignal, pid); | |
2118 | ||
923929f6 | 2119 | if (timeout == 0) |
f8bdb6dc CB |
2120 | return true; |
2121 | ||
2122 | ret = lxc_cmd_sock_rcv_state(state_client_fd, timeout); | |
2123 | close(state_client_fd); | |
2124 | if (ret < 0) | |
2125 | return false; | |
2126 | ||
2127 | TRACE("Received state \"%s\"", lxc_state2str(ret)); | |
2128 | if (ret != STOPPED) | |
2129 | return false; | |
2130 | ||
2131 | return true; | |
72d0e1cb SG |
2132 | } |
2133 | ||
858377e4 SH |
2134 | WRAP_API_1(bool, lxcapi_shutdown, int) |
2135 | ||
1897e3bc | 2136 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 2137 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
2138 | { |
2139 | bool bret = false; | |
a0e93eeb | 2140 | char **args = NULL; |
72d0e1cb | 2141 | va_list ap; |
72d0e1cb SG |
2142 | |
2143 | if (!c) | |
2144 | return false; | |
2145 | ||
858377e4 SH |
2146 | current_config = c->lxc_conf; |
2147 | ||
72d0e1cb SG |
2148 | /* |
2149 | * since we're going to wait for create to finish, I don't think we | |
2150 | * need to get a copy of the arguments. | |
2151 | */ | |
dc23c1c8 | 2152 | va_start(ap, flags); |
a0e93eeb | 2153 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 2154 | va_end(ap); |
a0e93eeb | 2155 | if (!args) { |
e9e29a33 | 2156 | ERROR("Failed to allocate memory"); |
a0e93eeb CS |
2157 | goto out; |
2158 | } | |
72d0e1cb | 2159 | |
858377e4 | 2160 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
2161 | |
2162 | out: | |
a0e93eeb | 2163 | free(args); |
858377e4 | 2164 | current_config = NULL; |
72d0e1cb SG |
2165 | return bret; |
2166 | } | |
2167 | ||
6b0d5538 SH |
2168 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
2169 | { | |
4222a9f4 CB |
2170 | if (!strcmp(key, "lxc.cgroup")) |
2171 | return clear_unexp_config_line(conf, key, true); | |
2172 | ||
2173 | if (!strcmp(key, "lxc.network")) | |
2174 | return clear_unexp_config_line(conf, key, true); | |
2175 | ||
2176 | if (!strcmp(key, "lxc.net")) | |
2177 | return clear_unexp_config_line(conf, key, true); | |
2178 | ||
2179 | /* Clear a network with a specific index. */ | |
2180 | if (!strncmp(key, "lxc.net.", 8)) { | |
2181 | int ret; | |
2182 | const char *idx; | |
2183 | ||
2184 | idx = key + 8; | |
2185 | ret = lxc_safe_uint(idx, &(unsigned int){0}); | |
2186 | if (!ret) | |
2187 | return clear_unexp_config_line(conf, key, true); | |
2188 | } | |
2189 | ||
2190 | if (!strcmp(key, "lxc.hook")) | |
2191 | return clear_unexp_config_line(conf, key, true); | |
2192 | ||
2193 | return clear_unexp_config_line(conf, key, false); | |
6b0d5538 SH |
2194 | } |
2195 | ||
6afd673f CB |
2196 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, |
2197 | const char *key) | |
72d0e1cb | 2198 | { |
6afd673f CB |
2199 | int ret = 1; |
2200 | struct lxc_config_t *config; | |
72d0e1cb SG |
2201 | |
2202 | if (!c || !c->lxc_conf) | |
2203 | return false; | |
6afd673f | 2204 | |
5cee8c50 | 2205 | if (container_mem_lock(c)) |
72d0e1cb | 2206 | return false; |
6afd673f | 2207 | |
300df83e | 2208 | config = lxc_get_config(key); |
6afd673f CB |
2209 | /* Verify that the config key exists and that it has a callback |
2210 | * implemented. | |
2211 | */ | |
2212 | if (config && config->clr) | |
26471403 | 2213 | ret = config->clr(key, c->lxc_conf, NULL); |
a73846d8 | 2214 | |
6b0d5538 SH |
2215 | if (!ret) |
2216 | do_clear_unexp_config_line(c->lxc_conf, key); | |
6afd673f | 2217 | |
5cee8c50 | 2218 | container_mem_unlock(c); |
72d0e1cb SG |
2219 | return ret == 0; |
2220 | } | |
2221 | ||
858377e4 SH |
2222 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
2223 | ||
e0f59189 | 2224 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 2225 | { |
858377e4 | 2226 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 2227 | |
caab004f TA |
2228 | if (pid < 0) |
2229 | return false; | |
2230 | ||
a73846d8 | 2231 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && |
2232 | (access("/proc/self/ns/user", F_OK) == 0)) | |
51d0854c DY |
2233 | if (!switch_to_ns(pid, "user")) |
2234 | return false; | |
a73846d8 | 2235 | |
51d0854c | 2236 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
2237 | } |
2238 | ||
1a0e70ac | 2239 | /* Used by qsort and bsearch functions for comparing names. */ |
9c88ff1f ÇO |
2240 | static inline int string_cmp(char **first, char **second) |
2241 | { | |
2242 | return strcmp(*first, *second); | |
2243 | } | |
2244 | ||
1a0e70ac CB |
2245 | /* Used by qsort and bsearch functions for comparing container names. */ |
2246 | static inline int container_cmp(struct lxc_container **first, | |
2247 | struct lxc_container **second) | |
9c88ff1f ÇO |
2248 | { |
2249 | return strcmp((*first)->name, (*second)->name); | |
2250 | } | |
2251 | ||
2252 | static bool add_to_array(char ***names, char *cname, int pos) | |
2253 | { | |
2254 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
2255 | if (!newnames) { | |
2256 | ERROR("Out of memory"); | |
2257 | return false; | |
2258 | } | |
2259 | ||
2260 | *names = newnames; | |
2261 | newnames[pos] = strdup(cname); | |
2262 | if (!newnames[pos]) | |
2263 | return false; | |
2264 | ||
3b034c39 | 2265 | /* Sort the array as we will use binary search on it. */ |
1a0e70ac CB |
2266 | qsort(newnames, pos + 1, sizeof(char *), |
2267 | (int (*)(const void *, const void *))string_cmp); | |
9c88ff1f ÇO |
2268 | |
2269 | return true; | |
2270 | } | |
2271 | ||
1a0e70ac CB |
2272 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, |
2273 | int pos, bool sort) | |
9c88ff1f | 2274 | { |
1a0e70ac | 2275 | struct lxc_container **newlist = realloc(*list, (pos + 1) * sizeof(struct lxc_container *)); |
9c88ff1f ÇO |
2276 | if (!newlist) { |
2277 | ERROR("Out of memory"); | |
2278 | return false; | |
2279 | } | |
2280 | ||
2281 | *list = newlist; | |
2282 | newlist[pos] = c; | |
2283 | ||
3b034c39 | 2284 | /* Sort the array as we will use binary search on it. */ |
2871830a | 2285 | if (sort) |
1a0e70ac CB |
2286 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), |
2287 | (int (*)(const void *, const void *))container_cmp); | |
9c88ff1f ÇO |
2288 | |
2289 | return true; | |
2290 | } | |
2291 | ||
2292 | static char** get_from_array(char ***names, char *cname, int size) | |
2293 | { | |
2294 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
2295 | } | |
2296 | ||
a73846d8 | 2297 | static bool array_contains(char ***names, char *cname, int size) |
2298 | { | |
9c88ff1f ÇO |
2299 | if(get_from_array(names, cname, size) != NULL) |
2300 | return true; | |
a73846d8 | 2301 | |
9c88ff1f ÇO |
2302 | return false; |
2303 | } | |
2304 | ||
2305 | static bool remove_from_array(char ***names, char *cname, int size) | |
2306 | { | |
2307 | char **result = get_from_array(names, cname, size); | |
2308 | if (result != NULL) { | |
2309 | free(result); | |
2310 | return true; | |
2311 | } | |
a73846d8 | 2312 | |
9c88ff1f ÇO |
2313 | return false; |
2314 | } | |
2315 | ||
9f4866a6 | 2316 | static char **do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 2317 | { |
ae22a220 ÇO |
2318 | pid_t pid; |
2319 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 2320 | char **interfaces = NULL; |
ae22a220 | 2321 | char interface[IFNAMSIZ]; |
799f29ab | 2322 | |
0ac84f04 | 2323 | if (pipe2(pipefd, O_CLOEXEC) < 0) |
ae22a220 | 2324 | return NULL; |
c868b261 | 2325 | |
ae22a220 ÇO |
2326 | pid = fork(); |
2327 | if (pid < 0) { | |
9f4866a6 | 2328 | SYSERROR("Failed to fork task to get interfaces information"); |
ae22a220 ÇO |
2329 | close(pipefd[0]); |
2330 | close(pipefd[1]); | |
2331 | return NULL; | |
2332 | } | |
799f29ab | 2333 | |
1a0e70ac | 2334 | if (pid == 0) { /* child */ |
ae22a220 | 2335 | int ret = 1, nbytes; |
b1e44ed1 | 2336 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
ae22a220 ÇO |
2337 | |
2338 | /* close the read-end of the pipe */ | |
2339 | close(pipefd[0]); | |
2340 | ||
e0f59189 | 2341 | if (!enter_net_ns(c)) { |
9f4866a6 | 2342 | SYSERROR("Failed to enter network namespace"); |
ae22a220 ÇO |
2343 | goto out; |
2344 | } | |
2345 | ||
2346 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2347 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
9f4866a6 | 2348 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2349 | goto out; |
2350 | } | |
2351 | ||
2352 | /* Iterate through the interfaces */ | |
9f4866a6 CB |
2353 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; |
2354 | tempIfAddr = tempIfAddr->ifa_next) { | |
2a2a676d | 2355 | nbytes = lxc_write_nointr(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); |
9f4866a6 | 2356 | if (nbytes < 0) |
ae22a220 | 2357 | goto out; |
9f4866a6 | 2358 | |
ae22a220 ÇO |
2359 | count++; |
2360 | } | |
a73846d8 | 2361 | |
ae22a220 ÇO |
2362 | ret = 0; |
2363 | ||
2364 | out: | |
2365 | if (interfaceArray) | |
b1e44ed1 | 2366 | netns_freeifaddrs(interfaceArray); |
ae22a220 ÇO |
2367 | |
2368 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
2369 | close(pipefd[1]); | |
02c611b0 | 2370 | _exit(ret); |
799f29ab ÇO |
2371 | } |
2372 | ||
ae22a220 ÇO |
2373 | /* close the write-end of the pipe */ |
2374 | close(pipefd[1]); | |
2375 | ||
3e1e9db8 | 2376 | while (lxc_read_nointr(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
3151d4e2 CB |
2377 | interface[IFNAMSIZ - 1] = '\0'; |
2378 | ||
ae22a220 | 2379 | if (array_contains(&interfaces, interface, count)) |
9f4866a6 | 2380 | continue; |
799f29ab | 2381 | |
9f4866a6 | 2382 | if (!add_to_array(&interfaces, interface, count)) |
3151d4e2 CB |
2383 | ERROR("Failed to add \"%s\" to array", interface); |
2384 | ||
9c88ff1f ÇO |
2385 | count++; |
2386 | } | |
799f29ab | 2387 | |
ae22a220 | 2388 | if (wait_for_pid(pid) != 0) { |
9f4866a6 | 2389 | for (i = 0; i < count; i++) |
ae22a220 | 2390 | free(interfaces[i]); |
a73846d8 | 2391 | |
ae22a220 ÇO |
2392 | free(interfaces); |
2393 | interfaces = NULL; | |
2394 | } | |
9c88ff1f | 2395 | |
ae22a220 ÇO |
2396 | /* close the read-end of the pipe */ |
2397 | close(pipefd[0]); | |
799f29ab | 2398 | |
9c88ff1f | 2399 | /* Append NULL to the array */ |
9f4866a6 | 2400 | if (interfaces) |
9c88ff1f | 2401 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); |
799f29ab | 2402 | |
9c88ff1f | 2403 | return interfaces; |
799f29ab ÇO |
2404 | } |
2405 | ||
858377e4 SH |
2406 | WRAP_API(char **, lxcapi_get_interfaces) |
2407 | ||
02a0e184 CB |
2408 | static char **do_lxcapi_get_ips(struct lxc_container *c, const char *interface, |
2409 | const char *family, int scope) | |
799f29ab | 2410 | { |
02a0e184 | 2411 | int i, ret; |
ae22a220 | 2412 | pid_t pid; |
02a0e184 | 2413 | int pipefd[2]; |
ae22a220 | 2414 | char address[INET6_ADDRSTRLEN]; |
02a0e184 CB |
2415 | int count = 0; |
2416 | char **addresses = NULL; | |
799f29ab | 2417 | |
0ac84f04 | 2418 | ret = pipe2(pipefd, O_CLOEXEC); |
02a0e184 CB |
2419 | if (ret < 0) { |
2420 | SYSERROR("Failed to create pipe"); | |
ae22a220 | 2421 | return NULL; |
c868b261 ÇO |
2422 | } |
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 CB |
2432 | if (pid == 0) { |
2433 | ssize_t nbytes; | |
ae22a220 | 2434 | char addressOutputBuffer[INET6_ADDRSTRLEN]; |
a7547c5c | 2435 | char *address_ptr = NULL; |
02a0e184 | 2436 | void *tempAddrPtr = NULL; |
b1e44ed1 | 2437 | struct netns_ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; |
fe218ca3 | 2438 | |
ae22a220 ÇO |
2439 | /* close the read-end of the pipe */ |
2440 | close(pipefd[0]); | |
2441 | ||
e0f59189 | 2442 | if (!enter_net_ns(c)) { |
02a0e184 | 2443 | SYSERROR("Failed to attach to network namespace"); |
ae22a220 | 2444 | goto out; |
9c83a661 | 2445 | } |
ae22a220 ÇO |
2446 | |
2447 | /* Grab the list of interfaces */ | |
b1e44ed1 | 2448 | if (netns_getifaddrs(&interfaceArray, -1, &(bool){false})) { |
02a0e184 | 2449 | SYSERROR("Failed to get interfaces list"); |
ae22a220 ÇO |
2450 | goto out; |
2451 | } | |
2452 | ||
2453 | /* Iterate through the interfaces */ | |
02a0e184 CB |
2454 | for (tempIfAddr = interfaceArray; tempIfAddr; |
2455 | tempIfAddr = tempIfAddr->ifa_next) { | |
ae22a220 | 2456 | if (tempIfAddr->ifa_addr == NULL) |
9c83a661 SG |
2457 | continue; |
2458 | ||
6ce39620 CB |
2459 | #pragma GCC diagnostic push |
2460 | #pragma GCC diagnostic ignored "-Wcast-align" | |
2461 | ||
02a0e184 | 2462 | if (tempIfAddr->ifa_addr->sa_family == AF_INET) { |
ae22a220 ÇO |
2463 | if (family && strcmp(family, "inet")) |
2464 | continue; | |
02a0e184 | 2465 | |
ae22a220 | 2466 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; |
02a0e184 | 2467 | } else { |
ae22a220 ÇO |
2468 | if (family && strcmp(family, "inet6")) |
2469 | continue; | |
2470 | ||
2471 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
2472 | continue; | |
2473 | ||
2474 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
2475 | } | |
2476 | ||
6ce39620 CB |
2477 | #pragma GCC diagnostic pop |
2478 | ||
ae22a220 ÇO |
2479 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) |
2480 | continue; | |
2481 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
2482 | continue; |
2483 | ||
a7547c5c | 2484 | address_ptr = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
02a0e184 CB |
2485 | tempAddrPtr, 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 CB |
2491 | if (nbytes != INET6_ADDRSTRLEN) { |
2492 | SYSERROR("Failed to send ipv6 address \"%s\"", | |
a7547c5c | 2493 | address_ptr); |
ae22a220 ÇO |
2494 | goto out; |
2495 | } | |
a73846d8 | 2496 | |
ae22a220 | 2497 | count++; |
9c83a661 | 2498 | } |
a73846d8 | 2499 | |
ae22a220 | 2500 | ret = 0; |
9c83a661 | 2501 | |
ae22a220 | 2502 | out: |
02a0e184 | 2503 | if (interfaceArray) |
b1e44ed1 | 2504 | netns_freeifaddrs(interfaceArray); |
9c83a661 | 2505 | |
ae22a220 ÇO |
2506 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
2507 | close(pipefd[1]); | |
fe1ce58c | 2508 | _exit(ret); |
6849cb5b | 2509 | } |
9c83a661 | 2510 | |
ae22a220 ÇO |
2511 | /* close the write-end of the pipe */ |
2512 | close(pipefd[1]); | |
2513 | ||
02a0e184 CB |
2514 | while (lxc_read_nointr(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
2515 | address[INET6_ADDRSTRLEN - 1] = '\0'; | |
2516 | ||
2517 | if (!add_to_array(&addresses, address, count)) | |
ae22a220 | 2518 | ERROR("PARENT: add_to_array failed"); |
02a0e184 | 2519 | |
9c88ff1f | 2520 | count++; |
9c83a661 SG |
2521 | } |
2522 | ||
ae22a220 | 2523 | if (wait_for_pid(pid) != 0) { |
02a0e184 | 2524 | for (i = 0; i < count; i++) |
ae22a220 | 2525 | free(addresses[i]); |
02a0e184 | 2526 | |
ae22a220 ÇO |
2527 | free(addresses); |
2528 | addresses = NULL; | |
2529 | } | |
9c83a661 | 2530 | |
ae22a220 ÇO |
2531 | /* close the read-end of the pipe */ |
2532 | close(pipefd[0]); | |
9c83a661 SG |
2533 | |
2534 | /* Append NULL to the array */ | |
02a0e184 | 2535 | if (addresses) |
9c88ff1f | 2536 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); |
9c83a661 SG |
2537 | |
2538 | return addresses; | |
2539 | } | |
2540 | ||
858377e4 SH |
2541 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
2542 | ||
2543 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2544 | { |
fce687aa CB |
2545 | int ret = -1; |
2546 | struct lxc_config_t *config; | |
72d0e1cb SG |
2547 | |
2548 | if (!c || !c->lxc_conf) | |
2549 | return -1; | |
fce687aa | 2550 | |
5cee8c50 | 2551 | if (container_mem_lock(c)) |
72d0e1cb | 2552 | return -1; |
fce687aa | 2553 | |
300df83e | 2554 | config = lxc_get_config(key); |
fce687aa CB |
2555 | /* Verify that the config key exists and that it has a callback |
2556 | * implemented. | |
2557 | */ | |
2558 | if (config && config->get) | |
cccd2219 | 2559 | ret = config->get(key, retv, inlen, c->lxc_conf, NULL); |
fce687aa | 2560 | |
5cee8c50 | 2561 | container_mem_unlock(c); |
72d0e1cb SG |
2562 | return ret; |
2563 | } | |
2564 | ||
858377e4 SH |
2565 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
2566 | ||
2567 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
2568 | { |
2569 | char *ret; | |
2570 | ||
2571 | if (!c || !c->lxc_conf) | |
2572 | return NULL; | |
a73846d8 | 2573 | |
8ac18377 ÇO |
2574 | if (container_mem_lock(c)) |
2575 | return NULL; | |
a73846d8 | 2576 | |
858377e4 | 2577 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
2578 | container_mem_unlock(c); |
2579 | return ret; | |
2580 | } | |
2581 | ||
858377e4 SH |
2582 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
2583 | ||
2584 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb | 2585 | { |
300df83e CB |
2586 | int ret = -1; |
2587 | ||
2588 | /* List all config items. */ | |
72d0e1cb | 2589 | if (!key) |
cfc67626 | 2590 | return lxc_list_config_items(retv, inlen); |
300df83e | 2591 | |
72d0e1cb SG |
2592 | if (!c || !c->lxc_conf) |
2593 | return -1; | |
300df83e | 2594 | |
5cee8c50 | 2595 | if (container_mem_lock(c)) |
72d0e1cb | 2596 | return -1; |
300df83e CB |
2597 | |
2598 | /* Support 'lxc.net.<idx>', i.e. 'lxc.net.0' | |
2599 | * This is an intelligent result to show which keys are valid given the | |
2600 | * type of nic it is. | |
2601 | */ | |
6fba98b5 | 2602 | if (strncmp(key, "lxc.net.", 8) == 0) |
01f55c40 | 2603 | ret = lxc_list_net(c->lxc_conf, key, retv, inlen); |
fe9b7349 CB |
2604 | else |
2605 | ret = lxc_list_subkeys(c->lxc_conf, key, retv, inlen); | |
300df83e | 2606 | |
5cee8c50 | 2607 | container_mem_unlock(c); |
72d0e1cb SG |
2608 | return ret; |
2609 | } | |
2610 | ||
858377e4 SH |
2611 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
2612 | ||
2613 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 2614 | { |
0e1a60b0 | 2615 | int fd, lret; |
39dc698c | 2616 | bool ret = false, need_disklock = false; |
39dc698c | 2617 | |
72d0e1cb SG |
2618 | if (!alt_file) |
2619 | alt_file = c->configfile; | |
a73846d8 | 2620 | |
72d0e1cb | 2621 | if (!alt_file) |
1a0e70ac | 2622 | return false; |
39dc698c | 2623 | |
1a0e70ac | 2624 | /* If we haven't yet loaded a config, load the stock config. */ |
39dc698c | 2625 | if (!c->lxc_conf) { |
858377e4 | 2626 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
0e1a60b0 CB |
2627 | ERROR("Error loading default configuration file %s " |
2628 | "while saving %s", | |
2629 | lxc_global_config_value("lxc.default_config"), | |
2630 | c->name); | |
72d0e1cb SG |
2631 | return false; |
2632 | } | |
39dc698c | 2633 | } |
72d0e1cb | 2634 | |
5a3d2e1e SG |
2635 | if (!create_container_dir(c)) |
2636 | return false; | |
2637 | ||
1a0e70ac CB |
2638 | /* If we're writing to the container's config file, take the disk lock. |
2639 | * Otherwise just take the memlock to protect the struct lxc_container | |
2640 | * while we're traversing it. | |
39dc698c SH |
2641 | */ |
2642 | if (strcmp(c->configfile, alt_file) == 0) | |
2643 | need_disklock = true; | |
2644 | ||
2645 | if (need_disklock) | |
2646 | lret = container_disk_lock(c); | |
2647 | else | |
2648 | lret = container_mem_lock(c); | |
39dc698c | 2649 | if (lret) |
72d0e1cb | 2650 | return false; |
39dc698c | 2651 | |
10034af5 | 2652 | fd = open(alt_file, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, |
e581b9b5 | 2653 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
2654 | if (fd < 0) |
2655 | goto on_error; | |
2656 | ||
2657 | lret = write_config(fd, c->lxc_conf); | |
2658 | close(fd); | |
2659 | if (lret < 0) | |
2660 | goto on_error; | |
2661 | ||
39dc698c SH |
2662 | ret = true; |
2663 | ||
0e1a60b0 | 2664 | on_error: |
39dc698c SH |
2665 | if (need_disklock) |
2666 | container_disk_unlock(c); | |
2667 | else | |
2668 | container_mem_unlock(c); | |
0e1a60b0 | 2669 | |
39dc698c | 2670 | return ret; |
72d0e1cb SG |
2671 | } |
2672 | ||
858377e4 SH |
2673 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2674 | ||
0ea055b3 CB |
2675 | |
2676 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2677 | { |
0ea055b3 CB |
2678 | FILE *f1; |
2679 | struct stat fbuf; | |
42342bed CB |
2680 | void *buf = NULL; |
2681 | char *del = NULL; | |
8a22c168 CB |
2682 | char path[PATH_MAX]; |
2683 | char newpath[PATH_MAX]; | |
0ea055b3 | 2684 | int fd, ret, n = 0, v = 0; |
dfb31b25 | 2685 | bool bret = false; |
42342bed | 2686 | size_t len = 0, bytes = 0; |
dfb31b25 | 2687 | |
0ea055b3 | 2688 | if (container_disk_lock(c0)) |
dfb31b25 | 2689 | return false; |
0ea055b3 | 2690 | |
8a22c168 CB |
2691 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c0->config_path, c0->name); |
2692 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2693 | goto out; |
a73846d8 | 2694 | |
8a22c168 CB |
2695 | ret = snprintf(newpath, PATH_MAX, "%s\n%s\n", c->config_path, c->name); |
2696 | if (ret < 0 || ret > PATH_MAX) | |
dfb31b25 | 2697 | goto out; |
0ea055b3 CB |
2698 | |
2699 | /* If we find an lxc-snapshot file using the old format only listing the | |
2700 | * number of snapshots we will keep using it. */ | |
4110345b | 2701 | f1 = fopen(path, "re"); |
0ea055b3 CB |
2702 | if (f1) { |
2703 | n = fscanf(f1, "%d", &v); | |
2704 | fclose(f1); | |
2705 | if (n == 1 && v == 0) { | |
dc509bf2 CB |
2706 | ret = remove(path); |
2707 | if (ret < 0) | |
6d1400b5 | 2708 | SYSERROR("Failed to remove \"%s\"", path); |
2709 | ||
0ea055b3 CB |
2710 | n = 0; |
2711 | } | |
dfb31b25 | 2712 | } |
6d1400b5 | 2713 | |
0ea055b3 CB |
2714 | if (n == 1) { |
2715 | v += inc ? 1 : -1; | |
4110345b | 2716 | f1 = fopen(path, "we"); |
0ea055b3 CB |
2717 | if (!f1) |
2718 | goto out; | |
6d1400b5 | 2719 | |
0ea055b3 CB |
2720 | if (fprintf(f1, "%d\n", v) < 0) { |
2721 | ERROR("Error writing new snapshots value"); | |
2722 | fclose(f1); | |
2723 | goto out; | |
2724 | } | |
6d1400b5 | 2725 | |
0ea055b3 CB |
2726 | ret = fclose(f1); |
2727 | if (ret != 0) { | |
2728 | SYSERROR("Error writing to or closing snapshots file"); | |
2729 | goto out; | |
2730 | } | |
2731 | } else { | |
2732 | /* Here we know that we have or can use an lxc-snapshot file | |
2733 | * using the new format. */ | |
2734 | if (inc) { | |
4110345b | 2735 | f1 = fopen(path, "ae"); |
0ea055b3 CB |
2736 | if (!f1) |
2737 | goto out; | |
2738 | ||
2739 | if (fprintf(f1, "%s", newpath) < 0) { | |
2740 | ERROR("Error writing new snapshots entry"); | |
2741 | ret = fclose(f1); | |
2742 | if (ret != 0) | |
2743 | SYSERROR("Error writing to or closing snapshots file"); | |
2744 | goto out; | |
2745 | } | |
2746 | ||
2747 | ret = fclose(f1); | |
2748 | if (ret != 0) { | |
2749 | SYSERROR("Error writing to or closing snapshots file"); | |
2750 | goto out; | |
2751 | } | |
2752 | } else if (!inc) { | |
d028235d SG |
2753 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2754 | goto out; | |
2755 | ||
2756 | if (fstat(fd, &fbuf) < 0) { | |
2757 | close(fd); | |
2758 | goto out; | |
2759 | } | |
2760 | ||
2761 | if (fbuf.st_size != 0) { | |
25086a5f | 2762 | buf = lxc_strmmap(NULL, fbuf.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); |
d028235d SG |
2763 | if (buf == MAP_FAILED) { |
2764 | SYSERROR("Failed to create mapping %s", path); | |
2765 | close(fd); | |
2766 | goto out; | |
2767 | } | |
2768 | ||
2769 | len = strlen(newpath); | |
2770 | while ((del = strstr((char *)buf, newpath))) { | |
2771 | memmove(del, del + len, strlen(del) - len + 1); | |
2772 | bytes += len; | |
2773 | } | |
2774 | ||
25086a5f | 2775 | lxc_strmunmap(buf, fbuf.st_size); |
d028235d SG |
2776 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { |
2777 | SYSERROR("Failed to truncate file %s", path); | |
2778 | close(fd); | |
2779 | goto out; | |
2780 | } | |
2781 | } | |
a73846d8 | 2782 | |
d028235d SG |
2783 | close(fd); |
2784 | } | |
0ea055b3 CB |
2785 | |
2786 | /* If the lxc-snapshot file is empty, remove it. */ | |
2787 | if (stat(path, &fbuf) < 0) | |
2788 | goto out; | |
6d1400b5 | 2789 | |
d028235d | 2790 | if (!fbuf.st_size) { |
71261a5c CB |
2791 | ret = remove(path); |
2792 | if (ret < 0) | |
2793 | SYSERROR("Failed to remove \"%s\"", path); | |
0ea055b3 | 2794 | } |
dfb31b25 SH |
2795 | } |
2796 | ||
2797 | bret = true; | |
2798 | ||
2799 | out: | |
0ea055b3 | 2800 | container_disk_unlock(c0); |
dfb31b25 SH |
2801 | return bret; |
2802 | } | |
2803 | ||
d825fff3 | 2804 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2805 | { |
2806 | struct lxc_container *p; | |
8a22c168 | 2807 | char *lxcpath = NULL, *lxcname = NULL, path[PATH_MAX]; |
dfb31b25 SH |
2808 | size_t pathlen = 0, namelen = 0; |
2809 | FILE *f; | |
2810 | int ret; | |
2811 | ||
8a22c168 | 2812 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", |
dfb31b25 | 2813 | c->config_path, c->name); |
8a22c168 | 2814 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
2815 | ERROR("Path name too long"); |
2816 | return; | |
2817 | } | |
a73846d8 | 2818 | |
4110345b | 2819 | f = fopen(path, "re"); |
025ed0f3 | 2820 | if (f == NULL) |
dfb31b25 | 2821 | return; |
a73846d8 | 2822 | |
dfb31b25 SH |
2823 | while (getline(&lxcpath, &pathlen, f) != -1) { |
2824 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2825 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2826 | goto out; |
2827 | } | |
7ad37670 CB |
2828 | |
2829 | remove_trailing_newlines(lxcpath); | |
2830 | remove_trailing_newlines(lxcname); | |
2831 | ||
dfb31b25 SH |
2832 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { |
2833 | ERROR("Unable to find dependent container %s:%s", | |
2834 | lxcpath, lxcname); | |
2835 | continue; | |
2836 | } | |
a73846d8 | 2837 | |
0ea055b3 CB |
2838 | if (!mod_rdep(p, c, inc)) |
2839 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 | 2840 | lxcpath, lxcname); |
a73846d8 | 2841 | |
dfb31b25 SH |
2842 | lxc_container_put(p); |
2843 | } | |
a73846d8 | 2844 | |
dfb31b25 | 2845 | out: |
f10fad2f ME |
2846 | free(lxcpath); |
2847 | free(lxcname); | |
dfb31b25 SH |
2848 | fclose(f); |
2849 | } | |
2850 | ||
18aa217b | 2851 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2852 | { |
0ea055b3 | 2853 | FILE *f; |
8a22c168 | 2854 | char path[PATH_MAX]; |
dfb31b25 | 2855 | int ret, v; |
0ea055b3 | 2856 | struct stat fbuf; |
dfb31b25 SH |
2857 | bool bret = false; |
2858 | ||
8a22c168 | 2859 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_snapshots", c->config_path, |
dfb31b25 | 2860 | c->name); |
8a22c168 | 2861 | if (ret < 0 || ret > PATH_MAX) |
dfb31b25 | 2862 | goto out; |
a73846d8 | 2863 | |
0ea055b3 CB |
2864 | /* If the file doesn't exist there are no snapshots. */ |
2865 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2866 | goto out; |
a73846d8 | 2867 | |
0ea055b3 CB |
2868 | v = fbuf.st_size; |
2869 | if (v != 0) { | |
4110345b | 2870 | f = fopen(path, "re"); |
0ea055b3 CB |
2871 | if (!f) |
2872 | goto out; | |
a73846d8 | 2873 | |
0ea055b3 CB |
2874 | ret = fscanf(f, "%d", &v); |
2875 | fclose(f); | |
1a0e70ac | 2876 | /* TODO: Figure out what to do with the return value of fscanf. */ |
0ea055b3 CB |
2877 | if (ret != 1) |
2878 | INFO("Container uses new lxc-snapshots format %s", path); | |
2879 | } | |
a73846d8 | 2880 | |
dfb31b25 SH |
2881 | bret = v != 0; |
2882 | ||
2883 | out: | |
2884 | return bret; | |
2885 | } | |
2886 | ||
18aa217b SH |
2887 | static bool has_snapshots(struct lxc_container *c) |
2888 | { | |
4110345b | 2889 | __do_closedir DIR *dir = NULL; |
8a22c168 | 2890 | char path[PATH_MAX]; |
74f96976 | 2891 | struct dirent *direntp; |
4110345b | 2892 | int count = 0; |
18aa217b SH |
2893 | |
2894 | if (!get_snappath_dir(c, path)) | |
2895 | return false; | |
a73846d8 | 2896 | |
18aa217b SH |
2897 | dir = opendir(path); |
2898 | if (!dir) | |
2899 | return false; | |
a73846d8 | 2900 | |
74f96976 | 2901 | while ((direntp = readdir(dir))) { |
18aa217b SH |
2902 | if (!strcmp(direntp->d_name, ".")) |
2903 | continue; | |
2904 | ||
2905 | if (!strcmp(direntp->d_name, "..")) | |
2906 | continue; | |
2907 | count++; | |
2908 | break; | |
2909 | } | |
a73846d8 | 2910 | |
18aa217b SH |
2911 | return count > 0; |
2912 | } | |
2913 | ||
297c2d58 | 2914 | static bool do_destroy_container(struct lxc_conf *conf) { |
ee484f7f CB |
2915 | int ret; |
2916 | ||
e0010464 | 2917 | if (am_guest_unpriv()) { |
ee484f7f CB |
2918 | ret = userns_exec_full(conf, storage_destroy_wrapper, conf, |
2919 | "storage_destroy_wrapper"); | |
2920 | if (ret < 0) | |
d028235d | 2921 | return false; |
ee484f7f | 2922 | |
d028235d SG |
2923 | return true; |
2924 | } | |
ee484f7f | 2925 | |
10bc1861 | 2926 | return storage_destroy(conf); |
297c2d58 CB |
2927 | } |
2928 | ||
4355ab5f SH |
2929 | static int lxc_rmdir_onedev_wrapper(void *data) |
2930 | { | |
2931 | char *arg = (char *) data; | |
18aa217b | 2932 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2933 | } |
2934 | ||
17a367d8 | 2935 | static int lxc_unlink_exec_wrapper(void *data) |
72d0e1cb | 2936 | { |
17a367d8 CB |
2937 | char *arg = data; |
2938 | return unlink(arg); | |
2939 | } | |
2940 | ||
2941 | static bool container_destroy(struct lxc_container *c, | |
2942 | struct lxc_storage *storage) | |
2943 | { | |
2944 | const char *p1; | |
2945 | size_t len; | |
2946 | struct lxc_conf *conf; | |
2947 | char *path = NULL; | |
c868b261 | 2948 | bool bret = false; |
297c2d58 | 2949 | int ret = 0; |
72d0e1cb | 2950 | |
858377e4 | 2951 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2952 | return false; |
2953 | ||
a70a69e8 | 2954 | conf = c->lxc_conf; |
3bc449ed | 2955 | if (container_disk_lock(c)) |
72d0e1cb | 2956 | return false; |
72d0e1cb | 2957 | |
39dc698c | 2958 | if (!is_stopped(c)) { |
1a0e70ac | 2959 | /* We should queue some sort of error - in c->error_string? */ |
60bf62d4 SH |
2960 | ERROR("container %s is not stopped", c->name); |
2961 | goto out; | |
72d0e1cb SG |
2962 | } |
2963 | ||
a70a69e8 | 2964 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2965 | /* Start of environment variable setup for hooks */ |
cb8ff4d0 | 2966 | if (setenv("LXC_NAME", c->name, 1)) |
17a367d8 CB |
2967 | SYSERROR("Failed to set environment variable for container name"); |
2968 | ||
2969 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
2970 | SYSERROR("Failed to set environment variable for config path"); | |
2971 | ||
2972 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) | |
2973 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2974 | ||
2975 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
2976 | SYSERROR("Failed to set environment variable for rootfs mount"); | |
2977 | ||
2978 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) | |
2979 | SYSERROR("Failed to set environment variable for console path"); | |
2980 | ||
2981 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) | |
2982 | SYSERROR("Failed to set environment variable for console log"); | |
37cf711b SY |
2983 | /* End of environment variable setup for hooks */ |
2984 | ||
14a7b0f9 | 2985 | if (run_lxc_hooks(c->name, "destroy", conf, NULL)) { |
17a367d8 | 2986 | ERROR("Failed to execute clone hook for \"%s\"", c->name); |
37cf711b SY |
2987 | goto out; |
2988 | } | |
2989 | } | |
2990 | ||
2991 | if (current_config && conf == current_config) { | |
858377e4 | 2992 | current_config = NULL; |
a73846d8 | 2993 | |
37cf711b SY |
2994 | if (conf->logfd != -1) { |
2995 | close(conf->logfd); | |
2996 | conf->logfd = -1; | |
858377e4 SH |
2997 | } |
2998 | } | |
2999 | ||
6e54330c CB |
3000 | /* LXC is not managing the storage of the container. */ |
3001 | if (conf && !conf->rootfs.managed) | |
3002 | goto on_success; | |
3003 | ||
d028235d SG |
3004 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
3005 | if (!do_destroy_container(conf)) { | |
3006 | ERROR("Error destroying rootfs for %s", c->name); | |
3007 | goto out; | |
3008 | } | |
3009 | INFO("Destroyed rootfs for %s", c->name); | |
3010 | } | |
60bf62d4 | 3011 | |
dfb31b25 SH |
3012 | mod_all_rdeps(c, false); |
3013 | ||
17a367d8 CB |
3014 | p1 = do_lxcapi_get_config_path(c); |
3015 | /* strlen(p1) | |
3016 | * + | |
3017 | * / | |
3018 | * + | |
3019 | * strlen(c->name) | |
3020 | * + | |
3021 | * / | |
3022 | * + | |
3023 | * strlen("config") = 6 | |
3024 | * + | |
3025 | * \0 | |
3026 | */ | |
1b5d4bd8 | 3027 | len = strlen(p1) + 1 + strlen(c->name) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
17a367d8 CB |
3028 | path = malloc(len); |
3029 | if (!path) { | |
3030 | ERROR("Failed to allocate memory"); | |
3031 | goto out; | |
3032 | } | |
3033 | ||
3034 | /* For an overlay container the rootfs is considered immutable and | |
3035 | * cannot be removed when restoring from a snapshot. | |
3036 | */ | |
3037 | if (storage && (!strcmp(storage->type, "overlay") || | |
3038 | !strcmp(storage->type, "overlayfs")) && | |
3039 | (storage->flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
1b5d4bd8 | 3040 | ret = snprintf(path, len, "%s/%s/%s", p1, c->name, LXC_CONFIG_FNAME); |
17a367d8 CB |
3041 | if (ret < 0 || (size_t)ret >= len) |
3042 | goto out; | |
3043 | ||
e0010464 | 3044 | if (am_guest_unpriv()) |
17a367d8 CB |
3045 | ret = userns_exec_1(conf, lxc_unlink_exec_wrapper, path, |
3046 | "lxc_unlink_exec_wrapper"); | |
3047 | else | |
3048 | ret = unlink(path); | |
3049 | if (ret < 0) { | |
3050 | SYSERROR("Failed to destroy config file \"%s\" for \"%s\"", | |
3051 | path, c->name); | |
3052 | goto out; | |
3053 | } | |
3054 | INFO("Destroyed config file \"%s\" for \"%s\"", path, c->name); | |
3055 | ||
3056 | bret = true; | |
3057 | goto out; | |
3058 | } | |
3059 | ||
3060 | ret = snprintf(path, len, "%s/%s", p1, c->name); | |
3061 | if (ret < 0 || (size_t)ret >= len) | |
3062 | goto out; | |
a73846d8 | 3063 | |
e0010464 | 3064 | if (am_guest_unpriv()) |
ee484f7f CB |
3065 | ret = userns_exec_full(conf, lxc_rmdir_onedev_wrapper, path, |
3066 | "lxc_rmdir_onedev_wrapper"); | |
4355ab5f | 3067 | else |
18aa217b | 3068 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 3069 | if (ret < 0) { |
17a367d8 CB |
3070 | ERROR("Failed to destroy directory \"%s\" for \"%s\"", path, |
3071 | c->name); | |
60bf62d4 SH |
3072 | goto out; |
3073 | } | |
17a367d8 | 3074 | INFO("Destroyed directory \"%s\" for \"%s\"", path, c->name); |
297c2d58 | 3075 | |
6e54330c | 3076 | on_success: |
fef48dc9 | 3077 | bret = true; |
60bf62d4 SH |
3078 | |
3079 | out: | |
17a367d8 CB |
3080 | if (path) |
3081 | free(path); | |
a73846d8 | 3082 | |
3bc449ed | 3083 | container_disk_unlock(c); |
fef48dc9 | 3084 | return bret; |
72d0e1cb SG |
3085 | } |
3086 | ||
858377e4 | 3087 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
3088 | { |
3089 | if (!c || !lxcapi_is_defined(c)) | |
3090 | return false; | |
2b2655a8 | 3091 | |
6e54330c CB |
3092 | if (c->lxc_conf && c->lxc_conf->rootfs.managed) { |
3093 | if (has_snapshots(c)) { | |
3094 | ERROR("Container %s has snapshots; not removing", c->name); | |
3095 | return false; | |
3096 | } | |
18aa217b | 3097 | |
6e54330c CB |
3098 | if (has_fs_snapshots(c)) { |
3099 | ERROR("container %s has snapshots on its rootfs", c->name); | |
3100 | return false; | |
3101 | } | |
18aa217b SH |
3102 | } |
3103 | ||
17a367d8 | 3104 | return container_destroy(c, NULL); |
18aa217b SH |
3105 | } |
3106 | ||
858377e4 | 3107 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 3108 | |
858377e4 | 3109 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
3110 | { |
3111 | if (!c || !lxcapi_is_defined(c)) | |
3112 | return false; | |
a73846d8 | 3113 | |
18aa217b SH |
3114 | if (!lxcapi_snapshot_destroy_all(c)) { |
3115 | ERROR("Error deleting all snapshots"); | |
3116 | return false; | |
3117 | } | |
a73846d8 | 3118 | |
18aa217b SH |
3119 | return lxcapi_destroy(c); |
3120 | } | |
3121 | ||
858377e4 SH |
3122 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
3123 | ||
0d9cd9c3 CB |
3124 | int lxc_set_config_item_locked(struct lxc_conf *conf, const char *key, |
3125 | const char *v) | |
96532523 | 3126 | { |
0d9cd9c3 | 3127 | int ret; |
96532523 | 3128 | struct lxc_config_t *config; |
0d9cd9c3 CB |
3129 | bool bret = true; |
3130 | ||
3131 | config = lxc_get_config(key); | |
3132 | if (!config) | |
3133 | return -EINVAL; | |
3134 | ||
3135 | ret = config->set(key, v, conf, NULL); | |
3136 | if (ret < 0) | |
3137 | return -EINVAL; | |
3138 | ||
3139 | if (lxc_config_value_empty(v)) | |
3140 | do_clear_unexp_config_line(conf, key); | |
3141 | else | |
3142 | bret = do_append_unexp_config_line(conf, key, v); | |
3143 | if (!bret) | |
3144 | return -ENOMEM; | |
3145 | ||
3146 | return 0; | |
3147 | } | |
3148 | ||
3149 | static bool do_set_config_item_locked(struct lxc_container *c, const char *key, | |
3150 | const char *v) | |
3151 | { | |
3152 | int ret; | |
96532523 SH |
3153 | |
3154 | if (!c->lxc_conf) | |
3155 | c->lxc_conf = lxc_conf_init(); | |
4222a9f4 | 3156 | |
6b0d5538 | 3157 | if (!c->lxc_conf) |
96532523 | 3158 | return false; |
4222a9f4 | 3159 | |
0d9cd9c3 CB |
3160 | ret = lxc_set_config_item_locked(c->lxc_conf, key, v); |
3161 | if (ret < 0) | |
f979ac15 | 3162 | return false; |
4222a9f4 | 3163 | |
0d9cd9c3 | 3164 | return true; |
96532523 SH |
3165 | } |
3166 | ||
858377e4 | 3167 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 3168 | { |
72d0e1cb | 3169 | bool b = false; |
72d0e1cb SG |
3170 | |
3171 | if (!c) | |
3172 | return false; | |
3173 | ||
5cee8c50 | 3174 | if (container_mem_lock(c)) |
72d0e1cb SG |
3175 | return false; |
3176 | ||
0d9cd9c3 | 3177 | b = do_set_config_item_locked(c, key, v); |
72d0e1cb | 3178 | |
5cee8c50 | 3179 | container_mem_unlock(c); |
72d0e1cb SG |
3180 | return b; |
3181 | } | |
3182 | ||
858377e4 SH |
3183 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
3184 | ||
72d0e1cb SG |
3185 | static char *lxcapi_config_file_name(struct lxc_container *c) |
3186 | { | |
3187 | if (!c || !c->configfile) | |
3188 | return NULL; | |
a73846d8 | 3189 | |
72d0e1cb SG |
3190 | return strdup(c->configfile); |
3191 | } | |
3192 | ||
2a59a681 SH |
3193 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
3194 | { | |
3195 | if (!c || !c->config_path) | |
3196 | return NULL; | |
a73846d8 | 3197 | |
2a59a681 SH |
3198 | return (const char *)(c->config_path); |
3199 | } | |
3200 | ||
afeecbba SH |
3201 | /* |
3202 | * not for export | |
3203 | * Just recalculate the c->configfile based on the | |
3204 | * c->config_path, which must be set. | |
3205 | * The lxc_container must be locked or not yet public. | |
3206 | */ | |
3207 | static bool set_config_filename(struct lxc_container *c) | |
3208 | { | |
3209 | char *newpath; | |
3210 | int len, ret; | |
3211 | ||
3212 | if (!c->config_path) | |
3213 | return false; | |
3214 | ||
3215 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
1b5d4bd8 | 3216 | len = strlen(c->config_path) + 1 + strlen(c->name) + 1 + strlen(LXC_CONFIG_FNAME) + 1; |
afeecbba SH |
3217 | newpath = malloc(len); |
3218 | if (!newpath) | |
3219 | return false; | |
3220 | ||
1b5d4bd8 | 3221 | ret = snprintf(newpath, len, "%s/%s/%s", c->config_path, c->name, LXC_CONFIG_FNAME); |
afeecbba SH |
3222 | if (ret < 0 || ret >= len) { |
3223 | fprintf(stderr, "Error printing out config file name\n"); | |
3224 | free(newpath); | |
3225 | return false; | |
3226 | } | |
3227 | ||
f10fad2f | 3228 | free(c->configfile); |
afeecbba SH |
3229 | c->configfile = newpath; |
3230 | ||
3231 | return true; | |
3232 | } | |
3233 | ||
858377e4 | 3234 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
3235 | { |
3236 | char *p; | |
3237 | bool b = false; | |
afeecbba | 3238 | char *oldpath = NULL; |
2a59a681 SH |
3239 | |
3240 | if (!c) | |
3241 | return b; | |
3242 | ||
5cee8c50 | 3243 | if (container_mem_lock(c)) |
2a59a681 SH |
3244 | return b; |
3245 | ||
3246 | p = strdup(path); | |
afeecbba SH |
3247 | if (!p) { |
3248 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 3249 | goto err; |
afeecbba SH |
3250 | } |
3251 | ||
2a59a681 SH |
3252 | b = true; |
3253 | if (c->config_path) | |
afeecbba | 3254 | oldpath = c->config_path; |
2a59a681 | 3255 | c->config_path = p; |
afeecbba SH |
3256 | |
3257 | /* Since we've changed the config path, we have to change the | |
3258 | * config file name too */ | |
3259 | if (!set_config_filename(c)) { | |
3260 | ERROR("Out of memory setting new config filename"); | |
3261 | b = false; | |
3262 | free(c->config_path); | |
3263 | c->config_path = oldpath; | |
3264 | oldpath = NULL; | |
3265 | } | |
a73846d8 | 3266 | |
2a59a681 | 3267 | err: |
f10fad2f | 3268 | free(oldpath); |
5cee8c50 | 3269 | container_mem_unlock(c); |
2a59a681 SH |
3270 | return b; |
3271 | } | |
3272 | ||
858377e4 | 3273 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 3274 | |
858377e4 | 3275 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
3276 | { |
3277 | int ret; | |
2202afc9 | 3278 | struct cgroup_ops *cgroup_ops; |
794dd120 SH |
3279 | |
3280 | if (!c) | |
3281 | return false; | |
3282 | ||
3bc449ed | 3283 | if (is_stopped(c)) |
794dd120 SH |
3284 | return false; |
3285 | ||
5a087e05 | 3286 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3287 | if (!cgroup_ops) |
3288 | return false; | |
3289 | ||
2202afc9 | 3290 | ret = cgroup_ops->set(cgroup_ops, subsys, value, c->name, c->config_path); |
3bc449ed | 3291 | |
2202afc9 CB |
3292 | cgroup_exit(cgroup_ops); |
3293 | ||
3bc449ed | 3294 | return ret == 0; |
794dd120 SH |
3295 | } |
3296 | ||
858377e4 SH |
3297 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
3298 | ||
3299 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 3300 | { |
3bc449ed | 3301 | int ret; |
2202afc9 | 3302 | struct cgroup_ops *cgroup_ops; |
794dd120 | 3303 | |
6502006a | 3304 | if (!c) |
794dd120 SH |
3305 | return -1; |
3306 | ||
3bc449ed | 3307 | if (is_stopped(c)) |
794dd120 SH |
3308 | return -1; |
3309 | ||
5a087e05 | 3310 | cgroup_ops = cgroup_init(c->lxc_conf); |
2202afc9 CB |
3311 | if (!cgroup_ops) |
3312 | return -1; | |
3313 | ||
2202afc9 CB |
3314 | ret = cgroup_ops->get(cgroup_ops, subsys, retv, inlen, c->name, |
3315 | c->config_path); | |
2202afc9 CB |
3316 | |
3317 | cgroup_exit(cgroup_ops); | |
3318 | ||
794dd120 SH |
3319 | return ret; |
3320 | } | |
3321 | ||
858377e4 SH |
3322 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
3323 | ||
593e8478 | 3324 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 3325 | { |
593e8478 | 3326 | return lxc_global_config_value(key); |
a8428dfa SH |
3327 | } |
3328 | ||
b6b918a1 SG |
3329 | const char *lxc_get_version(void) |
3330 | { | |
95ee490b | 3331 | return LXC_VERSION; |
b6b918a1 SG |
3332 | } |
3333 | ||
f0ca2726 | 3334 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
3335 | { |
3336 | int in, out; | |
3337 | ssize_t len, ret; | |
3338 | char buf[8096]; | |
3339 | struct stat sbuf; | |
3340 | ||
3341 | if (file_exists(new)) { | |
3342 | ERROR("copy destination %s exists", new); | |
3343 | return -1; | |
3344 | } | |
a73846d8 | 3345 | |
9be53773 SH |
3346 | ret = stat(old, &sbuf); |
3347 | if (ret < 0) { | |
dfb31b25 | 3348 | INFO("Error stat'ing %s", old); |
9be53773 SH |
3349 | return -1; |
3350 | } | |
3351 | ||
3352 | in = open(old, O_RDONLY); | |
3353 | if (in < 0) { | |
dfb31b25 | 3354 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
3355 | return -1; |
3356 | } | |
a73846d8 | 3357 | |
9be53773 SH |
3358 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); |
3359 | if (out < 0) { | |
dfb31b25 | 3360 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
3361 | close(in); |
3362 | return -1; | |
3363 | } | |
3364 | ||
51a8a74c | 3365 | for (;;) { |
3e1e9db8 | 3366 | len = lxc_read_nointr(in, buf, 8096); |
9be53773 | 3367 | if (len < 0) { |
dfb31b25 | 3368 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
3369 | goto err; |
3370 | } | |
a73846d8 | 3371 | |
9be53773 SH |
3372 | if (len == 0) |
3373 | break; | |
a73846d8 | 3374 | |
2a2a676d | 3375 | ret = lxc_write_nointr(out, buf, len); |
1a0e70ac | 3376 | if (ret < len) { /* should we retry? */ |
dfb31b25 | 3377 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
3378 | goto err; |
3379 | } | |
3380 | } | |
a73846d8 | 3381 | |
9be53773 SH |
3382 | close(in); |
3383 | close(out); | |
3384 | ||
1a0e70ac | 3385 | /* We set mode, but not owner/group. */ |
9be53773 SH |
3386 | ret = chmod(new, sbuf.st_mode); |
3387 | if (ret) { | |
dfb31b25 | 3388 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
3389 | return -1; |
3390 | } | |
3391 | ||
3392 | return 0; | |
3393 | ||
3394 | err: | |
3395 | close(in); | |
3396 | close(out); | |
3397 | return -1; | |
3398 | } | |
3399 | ||
9be53773 SH |
3400 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
3401 | { | |
7a99b5a0 | 3402 | __do_free char *cpath = NULL; |
619256b5 | 3403 | int i, len, ret; |
9be53773 | 3404 | struct lxc_list *it; |
619256b5 ÇO |
3405 | |
3406 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
f5849fd7 | 3407 | cpath = must_realloc(NULL, len); |
619256b5 ÇO |
3408 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); |
3409 | if (ret < 0 || ret >= len) | |
3410 | return -1; | |
9be53773 SH |
3411 | |
3412 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
3413 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
3414 | char *hookname = it->elem; | |
c32981c3 | 3415 | char *fname = strrchr(hookname, '/'); |
8a22c168 | 3416 | char tmppath[PATH_MAX]; |
1a0e70ac | 3417 | if (!fname) /* relative path - we don't support, but maybe we should */ |
9be53773 | 3418 | return 0; |
a73846d8 | 3419 | |
619256b5 | 3420 | if (strncmp(hookname, cpath, len - 1) != 0) { |
1a0e70ac | 3421 | /* this hook is public - ignore */ |
619256b5 ÇO |
3422 | continue; |
3423 | } | |
a73846d8 | 3424 | |
1a0e70ac | 3425 | /* copy the script, and change the entry in confile */ |
8a22c168 | 3426 | ret = snprintf(tmppath, PATH_MAX, "%s/%s/%s", |
9be53773 | 3427 | c->config_path, c->name, fname+1); |
8a22c168 | 3428 | if (ret < 0 || ret >= PATH_MAX) |
9be53773 | 3429 | return -1; |
a73846d8 | 3430 | |
9be53773 SH |
3431 | ret = copy_file(it->elem, tmppath); |
3432 | if (ret < 0) | |
3433 | return -1; | |
a73846d8 | 3434 | |
9be53773 | 3435 | free(it->elem); |
a73846d8 | 3436 | |
9be53773 SH |
3437 | it->elem = strdup(tmppath); |
3438 | if (!it->elem) { | |
3439 | ERROR("out of memory copying hook path"); | |
3440 | return -1; | |
3441 | } | |
9be53773 SH |
3442 | } |
3443 | } | |
3444 | ||
67702c21 SH |
3445 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
3446 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
3447 | ERROR("Error saving new hooks in clone"); |
3448 | return -1; | |
3449 | } | |
a73846d8 | 3450 | |
858377e4 | 3451 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
3452 | return 0; |
3453 | } | |
3454 | ||
9be53773 SH |
3455 | |
3456 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
3457 | { | |
8a22c168 | 3458 | char newpath[PATH_MAX]; |
9be53773 SH |
3459 | char *oldpath = oldc->lxc_conf->fstab; |
3460 | int ret; | |
3461 | ||
3462 | if (!oldpath) | |
3463 | return 0; | |
3464 | ||
47148e96 CB |
3465 | clear_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", false); |
3466 | ||
c32981c3 | 3467 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
3468 | if (!p) |
3469 | return -1; | |
a73846d8 | 3470 | |
8a22c168 | 3471 | ret = snprintf(newpath, PATH_MAX, "%s/%s%s", |
9be53773 | 3472 | c->config_path, c->name, p); |
8a22c168 | 3473 | if (ret < 0 || ret >= PATH_MAX) { |
9be53773 SH |
3474 | ERROR("error printing new path for %s", oldpath); |
3475 | return -1; | |
3476 | } | |
a73846d8 | 3477 | |
9be53773 SH |
3478 | if (file_exists(newpath)) { |
3479 | ERROR("error: fstab file %s exists", newpath); | |
3480 | return -1; | |
3481 | } | |
3482 | ||
3483 | if (copy_file(oldpath, newpath) < 0) { | |
3484 | ERROR("error: copying %s to %s", oldpath, newpath); | |
3485 | return -1; | |
3486 | } | |
a73846d8 | 3487 | |
9be53773 | 3488 | free(c->lxc_conf->fstab); |
a73846d8 | 3489 | |
9be53773 SH |
3490 | c->lxc_conf->fstab = strdup(newpath); |
3491 | if (!c->lxc_conf->fstab) { | |
3492 | ERROR("error: allocating pathname"); | |
3493 | return -1; | |
3494 | } | |
a73846d8 | 3495 | |
47148e96 | 3496 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount.fstab", newpath)) { |
6b0d5538 SH |
3497 | ERROR("error saving new lxctab"); |
3498 | return -1; | |
3499 | } | |
9be53773 SH |
3500 | |
3501 | return 0; | |
3502 | } | |
3503 | ||
dfb31b25 SH |
3504 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
3505 | { | |
8a22c168 | 3506 | char path0[PATH_MAX], path1[PATH_MAX]; |
dfb31b25 SH |
3507 | int ret; |
3508 | ||
8a22c168 | 3509 | ret = snprintf(path0, PATH_MAX, "%s/%s/lxc_rdepends", c0->config_path, |
dfb31b25 | 3510 | c0->name); |
8a22c168 | 3511 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3512 | WARN("Error copying reverse dependencies"); |
3513 | return; | |
3514 | } | |
a73846d8 | 3515 | |
8a22c168 | 3516 | ret = snprintf(path1, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3517 | c->name); |
8a22c168 | 3518 | if (ret < 0 || ret >= PATH_MAX) { |
dfb31b25 SH |
3519 | WARN("Error copying reverse dependencies"); |
3520 | return; | |
3521 | } | |
a73846d8 | 3522 | |
dfb31b25 SH |
3523 | if (copy_file(path0, path1) < 0) { |
3524 | INFO("Error copying reverse dependencies"); | |
3525 | return; | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
3530 | { | |
3531 | int ret; | |
8a22c168 | 3532 | char path[PATH_MAX]; |
dfb31b25 SH |
3533 | FILE *f; |
3534 | bool bret; | |
3535 | ||
8a22c168 | 3536 | ret = snprintf(path, PATH_MAX, "%s/%s/lxc_rdepends", c->config_path, |
dfb31b25 | 3537 | c->name); |
8a22c168 | 3538 | if (ret < 0 || ret >= PATH_MAX) |
dfb31b25 | 3539 | return false; |
a73846d8 | 3540 | |
4110345b | 3541 | f = fopen(path, "ae"); |
dfb31b25 SH |
3542 | if (!f) |
3543 | return false; | |
a73846d8 | 3544 | |
dfb31b25 | 3545 | bret = true; |
a73846d8 | 3546 | |
1a0e70ac | 3547 | /* If anything goes wrong, just return an error. */ |
dfb31b25 SH |
3548 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) |
3549 | bret = false; | |
a73846d8 | 3550 | |
dfb31b25 SH |
3551 | if (fclose(f) != 0) |
3552 | bret = false; | |
a73846d8 | 3553 | |
dfb31b25 SH |
3554 | return bret; |
3555 | } | |
3556 | ||
15a90a10 SH |
3557 | /* |
3558 | * If the fs natively supports snapshot clones with no penalty, | |
3559 | * then default to those even if not requested. | |
3560 | * Currently we only do this for btrfs. | |
3561 | */ | |
3562 | bool should_default_to_snapshot(struct lxc_container *c0, | |
3563 | struct lxc_container *c1) | |
3564 | { | |
7a99b5a0 | 3565 | __do_free char *p0 = NULL, *p1 = NULL; |
2afdc31f | 3566 | int ret; |
15a90a10 SH |
3567 | size_t l0 = strlen(c0->config_path) + strlen(c0->name) + 2; |
3568 | size_t l1 = strlen(c1->config_path) + strlen(c1->name) + 2; | |
6e0fa6a0 | 3569 | char *rootfs = c0->lxc_conf->rootfs.path; |
15a90a10 | 3570 | |
f5849fd7 CB |
3571 | p0 = must_realloc(NULL, l0 + 1); |
3572 | p1 = must_realloc(NULL, l1 + 1); | |
2afdc31f CB |
3573 | ret = snprintf(p0, l0, "%s/%s", c0->config_path, c0->name); |
3574 | if (ret < 0 || ret >= l0) | |
3575 | return false; | |
3576 | ||
3577 | ret = snprintf(p1, l1, "%s/%s", c1->config_path, c1->name); | |
3578 | if (ret < 0 || ret >= l1) | |
3579 | return false; | |
9a09badc CB |
3580 | |
3581 | if (!is_btrfs_fs(p0) || !is_btrfs_fs(p1)) | |
3582 | return false; | |
3583 | ||
6e0fa6a0 CB |
3584 | if (is_btrfs_subvol(rootfs) <= 0) |
3585 | return false; | |
3586 | ||
15a90a10 SH |
3587 | return btrfs_same_fs(p0, p1) == 0; |
3588 | } | |
3589 | ||
9be53773 | 3590 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
763429b6 CB |
3591 | const char *newtype, int flags, const char *bdevdata, |
3592 | uint64_t newsize) | |
9be53773 | 3593 | { |
10bc1861 | 3594 | struct lxc_storage *bdev; |
07db51a2 | 3595 | bool need_rdep; |
9be53773 | 3596 | |
15a90a10 SH |
3597 | if (should_default_to_snapshot(c0, c)) |
3598 | flags |= LXC_CLONE_SNAPSHOT; | |
3599 | ||
10bc1861 CB |
3600 | bdev = storage_copy(c0, c->name, c->config_path, newtype, flags, |
3601 | bdevdata, newsize, &need_rdep); | |
9be53773 | 3602 | if (!bdev) { |
763429b6 | 3603 | ERROR("Error copying storage."); |
9be53773 SH |
3604 | return -1; |
3605 | } | |
763429b6 CB |
3606 | |
3607 | /* Set new rootfs. */ | |
9be53773 SH |
3608 | free(c->lxc_conf->rootfs.path); |
3609 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
10bc1861 | 3610 | storage_put(bdev); |
763429b6 | 3611 | |
dfb31b25 | 3612 | if (!c->lxc_conf->rootfs.path) { |
763429b6 CB |
3613 | ERROR("Out of memory while setting storage path."); |
3614 | return -1; | |
3615 | } | |
763429b6 | 3616 | |
7a96a068 CB |
3617 | /* Append a new lxc.rootfs.path entry to the unexpanded config. */ |
3618 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); | |
3619 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", | |
763429b6 CB |
3620 | c->lxc_conf->rootfs.path)) { |
3621 | ERROR("Error saving new rootfs to cloned config."); | |
d0218321 SH |
3622 | return -1; |
3623 | } | |
763429b6 | 3624 | |
eee59f94 SH |
3625 | if (flags & LXC_CLONE_SNAPSHOT) |
3626 | copy_rdepends(c, c0); | |
a73846d8 | 3627 | |
dfb31b25 SH |
3628 | if (need_rdep) { |
3629 | if (!add_rdepends(c, c0)) | |
3630 | WARN("Error adding reverse dependency from %s to %s", | |
763429b6 | 3631 | c->name, c0->name); |
dfb31b25 SH |
3632 | } |
3633 | ||
3634 | mod_all_rdeps(c, true); | |
3635 | ||
9be53773 SH |
3636 | return 0; |
3637 | } | |
3638 | ||
1354955b SH |
3639 | struct clone_update_data { |
3640 | struct lxc_container *c0; | |
3641 | struct lxc_container *c1; | |
3642 | int flags; | |
3643 | char **hookargs; | |
3644 | }; | |
3645 | ||
3646 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 3647 | { |
1354955b SH |
3648 | struct lxc_container *c0 = data->c0; |
3649 | struct lxc_container *c = data->c1; | |
3650 | int flags = data->flags; | |
3651 | char **hookargs = data->hookargs; | |
9be53773 | 3652 | int ret = -1; |
8a22c168 | 3653 | char path[PATH_MAX]; |
10bc1861 | 3654 | struct lxc_storage *bdev; |
9be53773 | 3655 | FILE *fout; |
148e91f5 | 3656 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
3657 | |
3658 | /* update hostname in rootfs */ | |
3659 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
3660 | ||
b58214ac CB |
3661 | (void)lxc_setgroups(0, NULL); |
3662 | ||
1354955b SH |
3663 | if (setgid(0) < 0) { |
3664 | ERROR("Failed to setgid to 0"); | |
3665 | return -1; | |
3666 | } | |
a73846d8 | 3667 | |
1354955b SH |
3668 | if (setuid(0) < 0) { |
3669 | ERROR("Failed to setuid to 0"); | |
9be53773 | 3670 | return -1; |
1354955b | 3671 | } |
a73846d8 | 3672 | |
1354955b SH |
3673 | if (unshare(CLONE_NEWNS) < 0) |
3674 | return -1; | |
a73846d8 | 3675 | |
8a388ed4 | 3676 | bdev = storage_init(c->lxc_conf); |
9be53773 | 3677 | if (!bdev) |
1354955b | 3678 | return -1; |
a73846d8 | 3679 | |
cf3ef16d SH |
3680 | if (strcmp(bdev->type, "dir") != 0) { |
3681 | if (unshare(CLONE_NEWNS) < 0) { | |
3682 | ERROR("error unsharing mounts"); | |
10bc1861 | 3683 | storage_put(bdev); |
1354955b | 3684 | return -1; |
cf3ef16d | 3685 | } |
a73846d8 | 3686 | |
2c6f3fc9 SH |
3687 | if (detect_shared_rootfs()) { |
3688 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
3689 | SYSERROR("Failed to make / rslave"); | |
3690 | ERROR("Continuing..."); | |
3691 | } | |
3692 | } | |
a73846d8 | 3693 | |
e7de366c | 3694 | if (bdev->ops->mount(bdev) < 0) { |
10bc1861 | 3695 | storage_put(bdev); |
1354955b | 3696 | return -1; |
e7de366c | 3697 | } |
1a0e70ac | 3698 | } else { /* TODO come up with a better way */ |
f10fad2f | 3699 | free(bdev->dest); |
3d7e738a | 3700 | bdev->dest = strdup(lxc_storage_get_path(bdev->src, bdev->type)); |
cf3ef16d | 3701 | } |
148e91f5 SH |
3702 | |
3703 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
3704 | /* Start of environment variable setup for hooks */ | |
a73846d8 | 3705 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) |
1143ed39 | 3706 | SYSERROR("failed to set environment variable for source container name"); |
a73846d8 | 3707 | |
3708 | if (setenv("LXC_NAME", c->name, 1)) | |
148e91f5 | 3709 | SYSERROR("failed to set environment variable for container name"); |
a73846d8 | 3710 | |
3711 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) | |
148e91f5 | 3712 | SYSERROR("failed to set environment variable for config path"); |
a73846d8 | 3713 | |
3714 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) | |
148e91f5 | 3715 | SYSERROR("failed to set environment variable for rootfs mount"); |
a73846d8 | 3716 | |
3717 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) | |
148e91f5 | 3718 | SYSERROR("failed to set environment variable for rootfs mount"); |
148e91f5 | 3719 | |
14a7b0f9 | 3720 | if (run_lxc_hooks(c->name, "clone", conf, hookargs)) { |
148e91f5 | 3721 | ERROR("Error executing clone hook for %s", c->name); |
10bc1861 | 3722 | storage_put(bdev); |
1354955b | 3723 | return -1; |
148e91f5 SH |
3724 | } |
3725 | } | |
3726 | ||
3727 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
8a22c168 | 3728 | ret = snprintf(path, PATH_MAX, "%s/etc/hostname", bdev->dest); |
10bc1861 | 3729 | storage_put(bdev); |
e7de366c | 3730 | |
8a22c168 | 3731 | if (ret < 0 || ret >= PATH_MAX) |
1354955b | 3732 | return -1; |
a73846d8 | 3733 | |
8058be39 | 3734 | if (!file_exists(path)) |
1354955b | 3735 | return 0; |
a73846d8 | 3736 | |
4110345b | 3737 | if (!(fout = fopen(path, "we"))) { |
959aee9c | 3738 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 3739 | return 0; |
148e91f5 | 3740 | } |
a73846d8 | 3741 | |
a684f0b7 ÇO |
3742 | if (fprintf(fout, "%s", c->name) < 0) { |
3743 | fclose(fout); | |
1354955b | 3744 | return -1; |
6849cb5b | 3745 | } |
a73846d8 | 3746 | |
148e91f5 | 3747 | if (fclose(fout) < 0) |
1354955b | 3748 | return -1; |
10bc1861 CB |
3749 | } else { |
3750 | storage_put(bdev); | |
9be53773 | 3751 | } |
e7de366c | 3752 | |
1354955b SH |
3753 | return 0; |
3754 | } | |
3755 | ||
3756 | static int clone_update_rootfs_wrapper(void *data) | |
3757 | { | |
3758 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
3759 | return clone_update_rootfs(arg); | |
9be53773 SH |
3760 | } |
3761 | ||
3762 | /* | |
3763 | * We want to support: | |
3764 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
3765 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
3766 | ||
ba115175 CB |
3767 | -s [ implies overlay] |
3768 | -s -B overlay | |
9be53773 SH |
3769 | |
3770 | only rootfs gets converted (copied/snapshotted) on clone. | |
3771 | */ | |
3772 | ||
d5752559 | 3773 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 3774 | { |
c32981c3 | 3775 | char *p = strrchr(path, '/'); |
d5752559 | 3776 | int ret = -1; |
9be53773 SH |
3777 | |
3778 | if (!p) | |
3779 | return -1; | |
a73846d8 | 3780 | |
9be53773 | 3781 | *p = '\0'; |
d028235d | 3782 | ret = do_create_container_dir(path, conf); |
9be53773 | 3783 | *p = '/'; |
a73846d8 | 3784 | |
9be53773 SH |
3785 | return ret; |
3786 | } | |
3787 | ||
858377e4 | 3788 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3789 | const char *lxcpath, int flags, |
d659597e | 3790 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3791 | char **hookargs) |
9be53773 | 3792 | { |
8a22c168 | 3793 | char newpath[PATH_MAX]; |
0e1a60b0 | 3794 | int fd, ret; |
1354955b | 3795 | struct clone_update_data data; |
3b392519 | 3796 | size_t saved_unexp_len; |
1354955b | 3797 | pid_t pid; |
17a367d8 CB |
3798 | int storage_copied = 0; |
3799 | char *origroot = NULL, *saved_unexp_conf = NULL; | |
3800 | struct lxc_container *c2 = NULL; | |
9be53773 | 3801 | |
858377e4 | 3802 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3803 | return NULL; |
3804 | ||
5cee8c50 | 3805 | if (container_mem_lock(c)) |
9be53773 | 3806 | return NULL; |
754076f5 BH |
3807 | if (!is_stopped(c) && !(flags & LXC_CLONE_ALLOW_RUNNING)) { |
3808 | ERROR("error: Original container (%s) is running. Use --allowrunning if you want to force a snapshot of the running container.", c->name); | |
9be53773 SH |
3809 | goto out; |
3810 | } | |
3811 | ||
1a0e70ac | 3812 | /* Make sure the container doesn't yet exist. */ |
05d53f4c SH |
3813 | if (!newname) |
3814 | newname = c->name; | |
a73846d8 | 3815 | |
05d53f4c | 3816 | if (!lxcpath) |
858377e4 | 3817 | lxcpath = do_lxcapi_get_config_path(c); |
a73846d8 | 3818 | |
1b5d4bd8 | 3819 | ret = snprintf(newpath, PATH_MAX, "%s/%s/%s", lxcpath, newname, LXC_CONFIG_FNAME); |
8a22c168 | 3820 | if (ret < 0 || ret >= PATH_MAX) { |
9be53773 SH |
3821 | SYSERROR("clone: failed making config pathname"); |
3822 | goto out; | |
3823 | } | |
17a367d8 | 3824 | |
9be53773 SH |
3825 | if (file_exists(newpath)) { |
3826 | ERROR("error: clone: %s exists", newpath); | |
3827 | goto out; | |
3828 | } | |
3829 | ||
d5752559 | 3830 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3831 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3832 | ERROR("Error creating container dir for %s", newpath); |
3833 | goto out; | |
3834 | } | |
3835 | ||
1a0e70ac | 3836 | /* Copy the configuration. Tweak it as needed. */ |
8d2efe40 SH |
3837 | if (c->lxc_conf->rootfs.path) { |
3838 | origroot = c->lxc_conf->rootfs.path; | |
3839 | c->lxc_conf->rootfs.path = NULL; | |
3840 | } | |
0e1a60b0 CB |
3841 | |
3842 | fd = open(newpath, O_WRONLY | O_CREAT | O_CLOEXEC, | |
e581b9b5 | 3843 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
0e1a60b0 CB |
3844 | if (fd < 0) { |
3845 | SYSERROR("Failed to open \"%s\"", newpath); | |
9be53773 SH |
3846 | goto out; |
3847 | } | |
5eea90e8 SH |
3848 | |
3849 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3850 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3851 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3852 | if (!c->lxc_conf->unexpanded_config) { | |
0e1a60b0 | 3853 | close(fd); |
5eea90e8 SH |
3854 | goto out; |
3855 | } | |
7a96a068 | 3856 | |
7a96a068 | 3857 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs.path", false); |
0e1a60b0 CB |
3858 | write_config(fd, c->lxc_conf); |
3859 | close(fd); | |
a73846d8 | 3860 | |
8d2efe40 | 3861 | c->lxc_conf->rootfs.path = origroot; |
a73846d8 | 3862 | |
5eea90e8 SH |
3863 | free(c->lxc_conf->unexpanded_config); |
3864 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3865 | saved_unexp_conf = NULL; | |
3b392519 | 3866 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3867 | |
1b5d4bd8 | 3868 | ret = snprintf(newpath, PATH_MAX, "%s/%s/%s", lxcpath, newname, LXC_ROOTFS_DNAME); |
8a22c168 | 3869 | if (ret < 0 || ret >= PATH_MAX) { |
90b366fc CB |
3870 | SYSERROR("clone: failed making rootfs pathname"); |
3871 | goto out; | |
3872 | } | |
17a367d8 CB |
3873 | |
3874 | ret = mkdir(newpath, 0755); | |
3875 | if (ret < 0) { | |
3876 | /* For an overlay container the rootfs is considered immutable | |
3877 | * and will not have been removed when restoring from a | |
3878 | * snapshot. | |
3879 | */ | |
3880 | if (errno != ENOENT && | |
3881 | !(flags & LXC_STORAGE_INTERNAL_OVERLAY_RESTORE)) { | |
3882 | SYSERROR("Failed to create directory \"%s\"", newpath); | |
3883 | goto out; | |
3884 | } | |
9be53773 SH |
3885 | } |
3886 | ||
e0010464 | 3887 | if (am_guest_unpriv()) { |
1354955b | 3888 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { |
959aee9c | 3889 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3890 | goto out; |
3891 | } | |
3892 | } | |
3893 | ||
05d53f4c | 3894 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3895 | if (!c2) { |
05d53f4c SH |
3896 | ERROR("clone: failed to create new container (%s %s)", newname, |
3897 | lxcpath); | |
9be53773 SH |
3898 | goto out; |
3899 | } | |
8d2efe40 | 3900 | |
1a0e70ac | 3901 | /* copy/snapshot rootfs's */ |
8d2efe40 SH |
3902 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); |
3903 | if (ret < 0) | |
3904 | goto out; | |
9be53773 | 3905 | |
1a0e70ac | 3906 | /* update utsname */ |
3d7ad474 CB |
3907 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3908 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
b67771bc | 3909 | clear_unexp_config_line(c2->lxc_conf, "lxc.uts.name", false); |
3d7ad474 | 3910 | |
0d9cd9c3 | 3911 | if (!do_set_config_item_locked(c2, "lxc.uts.name", newname)) { |
3d7ad474 CB |
3912 | ERROR("Error setting new hostname"); |
3913 | goto out; | |
3914 | } | |
96532523 SH |
3915 | } |
3916 | ||
1a0e70ac | 3917 | /* copy hooks */ |
619256b5 ÇO |
3918 | ret = copyhooks(c, c2); |
3919 | if (ret < 0) { | |
3920 | ERROR("error copying hooks"); | |
3921 | goto out; | |
9be53773 SH |
3922 | } |
3923 | ||
3924 | if (copy_fstab(c, c2) < 0) { | |
3925 | ERROR("error copying fstab"); | |
9be53773 SH |
3926 | goto out; |
3927 | } | |
3928 | ||
1a0e70ac | 3929 | /* update macaddrs */ |
6b0d5538 | 3930 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3931 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3932 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3933 | goto out; |
3934 | } | |
3935 | } | |
9be53773 | 3936 | |
1a0e70ac | 3937 | /* Update absolute paths for overlay mount directories. */ |
83e79752 | 3938 | if (ovl_update_abs_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) |
030ce9a9 CB |
3939 | goto out; |
3940 | ||
1a0e70ac CB |
3941 | /* We've now successfully created c2's storage, so clear it out if we |
3942 | * fail after this. | |
3943 | */ | |
176d9acb SH |
3944 | storage_copied = 1; |
3945 | ||
375c2258 | 3946 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3947 | goto out; |
9be53773 | 3948 | |
1354955b SH |
3949 | if ((pid = fork()) < 0) { |
3950 | SYSERROR("fork"); | |
9be53773 | 3951 | goto out; |
1354955b | 3952 | } |
a73846d8 | 3953 | |
1354955b SH |
3954 | if (pid > 0) { |
3955 | ret = wait_for_pid(pid); | |
3956 | if (ret) | |
3957 | goto out; | |
a73846d8 | 3958 | |
1354955b SH |
3959 | container_mem_unlock(c); |
3960 | return c2; | |
3961 | } | |
a73846d8 | 3962 | |
1354955b SH |
3963 | data.c0 = c; |
3964 | data.c1 = c2; | |
3965 | data.flags = flags; | |
3966 | data.hookargs = hookargs; | |
a73846d8 | 3967 | |
e0010464 | 3968 | if (am_guest_unpriv()) |
ee484f7f CB |
3969 | ret = userns_exec_full(c->lxc_conf, clone_update_rootfs_wrapper, |
3970 | &data, "clone_update_rootfs_wrapper"); | |
1354955b SH |
3971 | else |
3972 | ret = clone_update_rootfs(&data); | |
3973 | if (ret < 0) | |
d8480a31 | 3974 | _exit(EXIT_FAILURE); |
9be53773 | 3975 | |
5cee8c50 | 3976 | container_mem_unlock(c); |
d8480a31 | 3977 | _exit(EXIT_SUCCESS); |
9be53773 SH |
3978 | |
3979 | out: | |
5cee8c50 | 3980 | container_mem_unlock(c); |
375c2258 | 3981 | if (c2) { |
176d9acb SH |
3982 | if (!storage_copied) |
3983 | c2->lxc_conf->rootfs.path = NULL; | |
a73846d8 | 3984 | |
375c2258 | 3985 | c2->destroy(c2); |
9be53773 | 3986 | lxc_container_put(c2); |
375c2258 | 3987 | } |
9be53773 SH |
3988 | |
3989 | return NULL; | |
3990 | } | |
3991 | ||
858377e4 SH |
3992 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3993 | const char *lxcpath, int flags, | |
3994 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3995 | char **hookargs) | |
3996 | { | |
3997 | struct lxc_container * ret; | |
a73846d8 | 3998 | |
858377e4 SH |
3999 | current_config = c ? c->lxc_conf : NULL; |
4000 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
4001 | current_config = NULL; | |
a73846d8 | 4002 | |
858377e4 SH |
4003 | return ret; |
4004 | } | |
4005 | ||
4006 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e | 4007 | { |
10bc1861 | 4008 | struct lxc_storage *bdev; |
06e5650e | 4009 | struct lxc_container *newc; |
06e5650e | 4010 | |
d693cf93 | 4011 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
4012 | return false; |
4013 | ||
18aa217b SH |
4014 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
4015 | ERROR("Renaming a container with snapshots is not supported"); | |
4016 | return false; | |
4017 | } | |
a73846d8 | 4018 | |
8a388ed4 | 4019 | bdev = storage_init(c->lxc_conf); |
06e5650e ÇO |
4020 | if (!bdev) { |
4021 | ERROR("Failed to find original backing store type"); | |
4022 | return false; | |
4023 | } | |
4024 | ||
619256b5 | 4025 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
10bc1861 | 4026 | storage_put(bdev); |
06e5650e ÇO |
4027 | if (!newc) { |
4028 | lxc_container_put(newc); | |
4029 | return false; | |
4030 | } | |
4031 | ||
4032 | if (newc && lxcapi_is_defined(newc)) | |
4033 | lxc_container_put(newc); | |
4034 | ||
17a367d8 | 4035 | if (!container_destroy(c, NULL)) { |
06e5650e ÇO |
4036 | ERROR("Could not destroy existing container %s", c->name); |
4037 | return false; | |
4038 | } | |
a73846d8 | 4039 | |
06e5650e ÇO |
4040 | return true; |
4041 | } | |
4042 | ||
858377e4 SH |
4043 | WRAP_API_1(bool, lxcapi_rename, const char *) |
4044 | ||
d6430143 CB |
4045 | static int lxcapi_attach(struct lxc_container *c, |
4046 | lxc_attach_exec_t exec_function, void *exec_payload, | |
4047 | lxc_attach_options_t *options, pid_t *attached_process) | |
a0e93eeb | 4048 | { |
858377e4 SH |
4049 | int ret; |
4050 | ||
a0e93eeb CS |
4051 | if (!c) |
4052 | return -1; | |
4053 | ||
858377e4 SH |
4054 | current_config = c->lxc_conf; |
4055 | ||
d6430143 CB |
4056 | ret = lxc_attach(c, exec_function, exec_payload, options, |
4057 | attached_process); | |
858377e4 SH |
4058 | current_config = NULL; |
4059 | return ret; | |
a0e93eeb CS |
4060 | } |
4061 | ||
d6430143 CB |
4062 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, |
4063 | lxc_attach_options_t *options, | |
4064 | const char *program, | |
4065 | const char *const argv[]) | |
a0e93eeb CS |
4066 | { |
4067 | lxc_attach_command_t command; | |
4068 | pid_t pid; | |
d6430143 | 4069 | int ret; |
a0e93eeb CS |
4070 | |
4071 | if (!c) | |
4072 | return -1; | |
4073 | ||
d6430143 CB |
4074 | command.program = (char *)program; |
4075 | command.argv = (char **)argv; | |
a73846d8 | 4076 | |
d6430143 CB |
4077 | ret = lxc_attach(c, lxc_attach_run_command, &command, options, &pid); |
4078 | if (ret < 0) | |
4079 | return ret; | |
a73846d8 | 4080 | |
a0e93eeb CS |
4081 | return lxc_wait_for_pid_status(pid); |
4082 | } | |
4083 | ||
d6430143 CB |
4084 | static int lxcapi_attach_run_wait(struct lxc_container *c, |
4085 | lxc_attach_options_t *options, | |
4086 | const char *program, const char *const argv[]) | |
858377e4 SH |
4087 | { |
4088 | int ret; | |
a73846d8 | 4089 | |
858377e4 SH |
4090 | current_config = c ? c->lxc_conf : NULL; |
4091 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
4092 | current_config = NULL; | |
a73846d8 | 4093 | |
858377e4 SH |
4094 | return ret; |
4095 | } | |
4096 | ||
74a3920a | 4097 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 | 4098 | { |
7a99b5a0 | 4099 | __do_free char *fname = NULL; |
f5dd1d53 SH |
4100 | struct stat sb; |
4101 | int i = 0, ret; | |
4102 | ||
f5849fd7 | 4103 | fname = must_realloc(NULL, strlen(lxcpath) + 20); |
a73846d8 | 4104 | |
51a8a74c | 4105 | for (;;) { |
f5dd1d53 | 4106 | sprintf(fname, "%s/snap%d", lxcpath, i); |
a73846d8 | 4107 | |
f5dd1d53 SH |
4108 | ret = stat(fname, &sb); |
4109 | if (ret != 0) | |
4110 | return i; | |
a73846d8 | 4111 | |
f5dd1d53 SH |
4112 | i++; |
4113 | } | |
4114 | } | |
4115 | ||
18aa217b SH |
4116 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
4117 | { | |
4118 | int ret; | |
a73846d8 | 4119 | |
18aa217b SH |
4120 | /* |
4121 | * If the old style snapshot path exists, use it | |
4122 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
4123 | */ | |
8a22c168 CB |
4124 | ret = snprintf(snappath, PATH_MAX, "%ssnaps", c->config_path); |
4125 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4126 | return false; |
a73846d8 | 4127 | |
18aa217b | 4128 | if (dir_exists(snappath)) { |
8a22c168 CB |
4129 | ret = snprintf(snappath, PATH_MAX, "%ssnaps/%s", c->config_path, c->name); |
4130 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4131 | return false; |
a73846d8 | 4132 | |
18aa217b SH |
4133 | return true; |
4134 | } | |
4135 | ||
4136 | /* | |
4137 | * Use the new style path | |
4138 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
4139 | */ | |
8a22c168 CB |
4140 | ret = snprintf(snappath, PATH_MAX, "%s/%s/snaps", c->config_path, c->name); |
4141 | if (ret < 0 || ret >= PATH_MAX) | |
18aa217b | 4142 | return false; |
a73846d8 | 4143 | |
18aa217b SH |
4144 | return true; |
4145 | } | |
4146 | ||
858377e4 | 4147 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 | 4148 | { |
f5849fd7 | 4149 | __do_free char *dfnam = NULL; |
1b5d4bd8 | 4150 | int len; |
f5dd1d53 | 4151 | int i, flags, ret; |
df05fa0f | 4152 | time_t timer; |
4153 | struct tm tm_info; | |
f5dd1d53 | 4154 | struct lxc_container *c2; |
8a22c168 | 4155 | char snappath[PATH_MAX], newname[20]; |
df05fa0f | 4156 | char buffer[25]; |
4157 | FILE *f; | |
f5dd1d53 | 4158 | |
840f05df SH |
4159 | if (!c || !lxcapi_is_defined(c)) |
4160 | return -1; | |
4161 | ||
10bc1861 | 4162 | if (!storage_can_backup(c->lxc_conf)) { |
df05fa0f | 4163 | ERROR("%s's backing store cannot be backed up", c->name); |
4164 | ERROR("Your container must use another backing store type"); | |
cdd01be2 SH |
4165 | return -1; |
4166 | } | |
4167 | ||
18aa217b | 4168 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 4169 | return -1; |
18aa217b | 4170 | |
f5dd1d53 SH |
4171 | i = get_next_index(snappath, c->name); |
4172 | ||
4173 | if (mkdir_p(snappath, 0755) < 0) { | |
4174 | ERROR("Failed to create snapshot directory %s", snappath); | |
4175 | return -1; | |
4176 | } | |
4177 | ||
4178 | ret = snprintf(newname, 20, "snap%d", i); | |
4179 | if (ret < 0 || ret >= 20) | |
4180 | return -1; | |
4181 | ||
0a83cbbb SH |
4182 | /* |
4183 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
4184 | * created in the original container | |
4185 | */ | |
4186 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
4187 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
068aa488 | 4188 | if (storage_is_dir(c->lxc_conf)) { |
df05fa0f | 4189 | ERROR("Snapshot of directory-backed container requested"); |
8c39f7a4 | 4190 | ERROR("Making a copy-clone. If you do want snapshots, then"); |
12e6ab5d | 4191 | ERROR("please create overlay clone first, snapshot that"); |
df05fa0f | 4192 | ERROR("and keep the original container pristine"); |
8c39f7a4 SH |
4193 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; |
4194 | } | |
a73846d8 | 4195 | |
858377e4 | 4196 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 4197 | if (!c2) { |
df05fa0f | 4198 | ERROR("Failed to clone of %s:%s", c->config_path, c->name); |
f5dd1d53 SH |
4199 | return -1; |
4200 | } | |
4201 | ||
4202 | lxc_container_put(c2); | |
4203 | ||
1a0e70ac | 4204 | /* Now write down the creation time. */ |
f5dd1d53 | 4205 | time(&timer); |
f5dd1d53 | 4206 | |
df05fa0f | 4207 | if (!localtime_r(&timer, &tm_info)) { |
4208 | ERROR("Failed to get localtime"); | |
4209 | return -1; | |
4210 | } | |
4211 | ||
4212 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", &tm_info); | |
f5dd1d53 | 4213 | |
1b5d4bd8 RK |
4214 | len = strlen(snappath) + 1 + strlen(newname) + 1 + strlen(LXC_TIMESTAMP_FNAME) + 1; |
4215 | dfnam = must_realloc(NULL, len); | |
4216 | snprintf(dfnam, len, "%s/%s/%s", snappath, newname, LXC_TIMESTAMP_FNAME); | |
4110345b | 4217 | f = fopen(dfnam, "we"); |
f5dd1d53 | 4218 | if (!f) { |
959aee9c | 4219 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
4220 | return -1; |
4221 | } | |
a73846d8 | 4222 | |
f5dd1d53 SH |
4223 | if (fprintf(f, "%s", buffer) < 0) { |
4224 | SYSERROR("Writing timestamp"); | |
4225 | fclose(f); | |
4226 | return -1; | |
4227 | } | |
a73846d8 | 4228 | |
025ed0f3 | 4229 | ret = fclose(f); |
025ed0f3 | 4230 | if (ret != 0) { |
f5dd1d53 SH |
4231 | SYSERROR("Writing timestamp"); |
4232 | return -1; | |
4233 | } | |
4234 | ||
4235 | if (commentfile) { | |
7a99b5a0 | 4236 | __do_free char *path = NULL; |
1a0e70ac | 4237 | /* $p / $name / comment \0 */ |
1b5d4bd8 | 4238 | len = strlen(snappath) + 1 + strlen(newname) + 1 + strlen(LXC_COMMENT_FNAME) + 1; |
a73846d8 | 4239 | |
f5849fd7 | 4240 | path = must_realloc(NULL, len); |
1b5d4bd8 | 4241 | snprintf(path, len, "%s/%s/%s", snappath, newname, LXC_COMMENT_FNAME); |
f5dd1d53 SH |
4242 | return copy_file(commentfile, path) < 0 ? -1 : i; |
4243 | } | |
4244 | ||
4245 | return i; | |
4246 | } | |
4247 | ||
858377e4 SH |
4248 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
4249 | ||
f5dd1d53 SH |
4250 | static void lxcsnap_free(struct lxc_snapshot *s) |
4251 | { | |
f10fad2f ME |
4252 | free(s->name); |
4253 | free(s->comment_pathname); | |
4254 | free(s->timestamp); | |
4255 | free(s->lxcpath); | |
f5dd1d53 SH |
4256 | } |
4257 | ||
4258 | static char *get_snapcomment_path(char* snappath, char *name) | |
4259 | { | |
1a0e70ac | 4260 | /* $snappath/$name/comment */ |
f5dd1d53 SH |
4261 | int ret, len = strlen(snappath) + strlen(name) + 10; |
4262 | char *s = malloc(len); | |
4263 | ||
4264 | if (s) { | |
4265 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
4266 | if (ret < 0 || ret >= len) { | |
4267 | free(s); | |
4268 | s = NULL; | |
4269 | } | |
4270 | } | |
a73846d8 | 4271 | |
f5dd1d53 SH |
4272 | return s; |
4273 | } | |
4274 | ||
4275 | static char *get_timestamp(char* snappath, char *name) | |
4276 | { | |
8a22c168 | 4277 | char path[PATH_MAX], *s = NULL; |
f5dd1d53 SH |
4278 | int ret, len; |
4279 | FILE *fin; | |
4280 | ||
8a22c168 CB |
4281 | ret = snprintf(path, PATH_MAX, "%s/%s/ts", snappath, name); |
4282 | if (ret < 0 || ret >= PATH_MAX) | |
f5dd1d53 | 4283 | return NULL; |
a73846d8 | 4284 | |
4110345b | 4285 | fin = fopen(path, "re"); |
025ed0f3 | 4286 | if (!fin) |
f5dd1d53 | 4287 | return NULL; |
a73846d8 | 4288 | |
f5dd1d53 SH |
4289 | (void) fseek(fin, 0, SEEK_END); |
4290 | len = ftell(fin); | |
4291 | (void) fseek(fin, 0, SEEK_SET); | |
4292 | if (len > 0) { | |
4293 | s = malloc(len+1); | |
4294 | if (s) { | |
4295 | s[len] = '\0'; | |
4296 | if (fread(s, 1, len, fin) != len) { | |
4297 | SYSERROR("reading timestamp"); | |
4298 | free(s); | |
4299 | s = NULL; | |
4300 | } | |
4301 | } | |
4302 | } | |
a73846d8 | 4303 | |
f5dd1d53 SH |
4304 | fclose(fin); |
4305 | return s; | |
4306 | } | |
4307 | ||
858377e4 | 4308 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 | 4309 | { |
4110345b | 4310 | __do_closedir DIR *dir = NULL; |
8a22c168 | 4311 | char snappath[PATH_MAX], path2[PATH_MAX]; |
18aa217b | 4312 | int count = 0, ret; |
74f96976 | 4313 | struct dirent *direntp; |
f5dd1d53 | 4314 | struct lxc_snapshot *snaps =NULL, *nsnaps; |
f5dd1d53 SH |
4315 | |
4316 | if (!c || !lxcapi_is_defined(c)) | |
4317 | return -1; | |
c868b261 | 4318 | |
18aa217b | 4319 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
4320 | ERROR("path name too long"); |
4321 | return -1; | |
4322 | } | |
a73846d8 | 4323 | |
025ed0f3 | 4324 | dir = opendir(snappath); |
025ed0f3 | 4325 | if (!dir) { |
a73846d8 | 4326 | INFO("Failed to open %s - assuming no snapshots", snappath); |
f5dd1d53 SH |
4327 | return 0; |
4328 | } | |
4329 | ||
74f96976 | 4330 | while ((direntp = readdir(dir))) { |
f5dd1d53 SH |
4331 | if (!strcmp(direntp->d_name, ".")) |
4332 | continue; | |
4333 | ||
4334 | if (!strcmp(direntp->d_name, "..")) | |
4335 | continue; | |
4336 | ||
1b5d4bd8 | 4337 | ret = snprintf(path2, PATH_MAX, "%s/%s/%s", snappath, direntp->d_name, LXC_CONFIG_FNAME); |
8a22c168 | 4338 | if (ret < 0 || ret >= PATH_MAX) { |
f5dd1d53 SH |
4339 | ERROR("pathname too long"); |
4340 | goto out_free; | |
4341 | } | |
a73846d8 | 4342 | |
f5dd1d53 SH |
4343 | if (!file_exists(path2)) |
4344 | continue; | |
a73846d8 | 4345 | |
f5dd1d53 SH |
4346 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); |
4347 | if (!nsnaps) { | |
4348 | SYSERROR("Out of memory"); | |
4349 | goto out_free; | |
4350 | } | |
a73846d8 | 4351 | |
f5dd1d53 SH |
4352 | snaps = nsnaps; |
4353 | snaps[count].free = lxcsnap_free; | |
4354 | snaps[count].name = strdup(direntp->d_name); | |
4355 | if (!snaps[count].name) | |
4356 | goto out_free; | |
a73846d8 | 4357 | |
f5dd1d53 SH |
4358 | snaps[count].lxcpath = strdup(snappath); |
4359 | if (!snaps[count].lxcpath) { | |
4360 | free(snaps[count].name); | |
4361 | goto out_free; | |
4362 | } | |
a73846d8 | 4363 | |
f5dd1d53 SH |
4364 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); |
4365 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
4366 | count++; | |
4367 | } | |
4368 | ||
4369 | if (closedir(dir)) | |
a73846d8 | 4370 | WARN("Failed to close directory"); |
f5dd1d53 SH |
4371 | |
4372 | *ret_snaps = snaps; | |
4373 | return count; | |
4374 | ||
4375 | out_free: | |
4376 | if (snaps) { | |
4110345b | 4377 | for (int i = 0; i < count; i++) |
f5dd1d53 | 4378 | lxcsnap_free(&snaps[i]); |
a73846d8 | 4379 | |
f5dd1d53 SH |
4380 | free(snaps); |
4381 | } | |
a73846d8 | 4382 | |
f5dd1d53 SH |
4383 | return -1; |
4384 | } | |
4385 | ||
858377e4 SH |
4386 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
4387 | ||
4388 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 | 4389 | { |
8a22c168 | 4390 | char clonelxcpath[PATH_MAX]; |
18aa217b | 4391 | int flags = 0; |
f5dd1d53 | 4392 | struct lxc_container *snap, *rest; |
10bc1861 | 4393 | struct lxc_storage *bdev; |
f5dd1d53 SH |
4394 | bool b = false; |
4395 | ||
4396 | if (!c || !c->name || !c->config_path) | |
4397 | return false; | |
4398 | ||
18aa217b SH |
4399 | if (has_fs_snapshots(c)) { |
4400 | ERROR("container rootfs has dependent snapshots"); | |
4401 | return false; | |
4402 | } | |
4403 | ||
8a388ed4 | 4404 | bdev = storage_init(c->lxc_conf); |
f5dd1d53 SH |
4405 | if (!bdev) { |
4406 | ERROR("Failed to find original backing store type"); | |
4407 | return false; | |
4408 | } | |
4409 | ||
17a367d8 CB |
4410 | /* For an overlay container the rootfs is considered immutable |
4411 | * and cannot be removed when restoring from a snapshot. We pass this | |
4412 | * internal flag along to communicate this to various parts of the | |
4413 | * codebase. | |
4414 | */ | |
4415 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4416 | bdev->flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
4417 | ||
f5dd1d53 SH |
4418 | if (!newname) |
4419 | newname = c->name; | |
7e36f87e | 4420 | |
18aa217b | 4421 | if (!get_snappath_dir(c, clonelxcpath)) { |
10bc1861 | 4422 | storage_put(bdev); |
f5dd1d53 SH |
4423 | return false; |
4424 | } | |
1a0e70ac | 4425 | /* how should we lock this? */ |
f5dd1d53 SH |
4426 | |
4427 | snap = lxc_container_new(snapname, clonelxcpath); | |
4428 | if (!snap || !lxcapi_is_defined(snap)) { | |
4429 | ERROR("Could not open snapshot %s", snapname); | |
a73846d8 | 4430 | |
17a367d8 CB |
4431 | if (snap) |
4432 | lxc_container_put(snap); | |
a73846d8 | 4433 | |
10bc1861 | 4434 | storage_put(bdev); |
f5dd1d53 SH |
4435 | return false; |
4436 | } | |
4437 | ||
17a367d8 CB |
4438 | if (!strcmp(c->name, newname)) { |
4439 | if (!container_destroy(c, bdev)) { | |
7e36f87e ÇO |
4440 | ERROR("Could not destroy existing container %s", newname); |
4441 | lxc_container_put(snap); | |
10bc1861 | 4442 | storage_put(bdev); |
7e36f87e ÇO |
4443 | return false; |
4444 | } | |
4445 | } | |
4446 | ||
de269ee8 SH |
4447 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
4448 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
17a367d8 CB |
4449 | |
4450 | if (!strcmp(bdev->type, "overlay") || !strcmp(bdev->type, "overlayfs")) | |
4451 | flags |= LXC_STORAGE_INTERNAL_OVERLAY_RESTORE; | |
a73846d8 | 4452 | |
09f6f8c4 CB |
4453 | rest = lxcapi_clone(snap, newname, c->config_path, flags, bdev->type, |
4454 | NULL, 0, NULL); | |
10bc1861 | 4455 | storage_put(bdev); |
f5dd1d53 SH |
4456 | if (rest && lxcapi_is_defined(rest)) |
4457 | b = true; | |
a73846d8 | 4458 | |
f5dd1d53 SH |
4459 | if (rest) |
4460 | lxc_container_put(rest); | |
17a367d8 | 4461 | |
f5dd1d53 SH |
4462 | lxc_container_put(snap); |
4463 | return b; | |
4464 | } | |
4465 | ||
858377e4 SH |
4466 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
4467 | ||
18aa217b | 4468 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 4469 | { |
771d96b3 | 4470 | struct lxc_container *snap = NULL; |
18aa217b | 4471 | bool bret = false; |
771d96b3 ÇO |
4472 | |
4473 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 4474 | if (!snap) { |
771d96b3 ÇO |
4475 | ERROR("Could not find snapshot %s", snapname); |
4476 | goto err; | |
4477 | } | |
4478 | ||
858377e4 | 4479 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
4480 | ERROR("Could not destroy snapshot %s", snapname); |
4481 | goto err; | |
4482 | } | |
a73846d8 | 4483 | |
18aa217b | 4484 | bret = true; |
771d96b3 | 4485 | |
771d96b3 ÇO |
4486 | err: |
4487 | if (snap) | |
4488 | lxc_container_put(snap); | |
a73846d8 | 4489 | |
18aa217b SH |
4490 | return bret; |
4491 | } | |
4492 | ||
4493 | static bool remove_all_snapshots(const char *path) | |
4494 | { | |
4110345b | 4495 | __do_closedir DIR *dir = NULL; |
74f96976 | 4496 | struct dirent *direntp; |
18aa217b SH |
4497 | bool bret = true; |
4498 | ||
4499 | dir = opendir(path); | |
4500 | if (!dir) { | |
4501 | SYSERROR("opendir on snapshot path %s", path); | |
4502 | return false; | |
4503 | } | |
a73846d8 | 4504 | |
74f96976 | 4505 | while ((direntp = readdir(dir))) { |
18aa217b SH |
4506 | if (!strcmp(direntp->d_name, ".")) |
4507 | continue; | |
a73846d8 | 4508 | |
18aa217b SH |
4509 | if (!strcmp(direntp->d_name, "..")) |
4510 | continue; | |
a73846d8 | 4511 | |
18aa217b SH |
4512 | if (!do_snapshot_destroy(direntp->d_name, path)) { |
4513 | bret = false; | |
4514 | continue; | |
4515 | } | |
4516 | } | |
4517 | ||
18aa217b SH |
4518 | if (rmdir(path)) |
4519 | SYSERROR("Error removing directory %s", path); | |
4520 | ||
4521 | return bret; | |
4522 | } | |
4523 | ||
858377e4 | 4524 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b | 4525 | { |
8a22c168 | 4526 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4527 | |
4528 | if (!c || !c->name || !c->config_path || !snapname) | |
4529 | return false; | |
4530 | ||
4531 | if (!get_snappath_dir(c, clonelxcpath)) | |
4532 | return false; | |
4533 | ||
4534 | return do_snapshot_destroy(snapname, clonelxcpath); | |
4535 | } | |
4536 | ||
858377e4 SH |
4537 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
4538 | ||
4539 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b | 4540 | { |
8a22c168 | 4541 | char clonelxcpath[PATH_MAX]; |
18aa217b SH |
4542 | |
4543 | if (!c || !c->name || !c->config_path) | |
4544 | return false; | |
4545 | ||
4546 | if (!get_snappath_dir(c, clonelxcpath)) | |
4547 | return false; | |
4548 | ||
4549 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
4550 | } |
4551 | ||
858377e4 SH |
4552 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
4553 | ||
4554 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd | 4555 | { |
5106ecd0 | 4556 | if (!c) |
4557 | return false; | |
4558 | ||
b494d2dd SH |
4559 | return lxc_try_cmd(c->name, c->config_path) == 0; |
4560 | } | |
4561 | ||
858377e4 SH |
4562 | WRAP_API(bool, lxcapi_may_control) |
4563 | ||
d5aa23e6 | 4564 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
b69dfc9f | 4565 | struct stat *st) |
d5aa23e6 | 4566 | { |
b69dfc9f CB |
4567 | int ret; |
4568 | char *tmp; | |
4569 | pid_t pid; | |
8a22c168 | 4570 | char chrootpath[PATH_MAX]; |
d5aa23e6 | 4571 | char *directory_path = NULL; |
d5aa23e6 | 4572 | |
b69dfc9f CB |
4573 | pid = fork(); |
4574 | if (pid < 0) { | |
4575 | SYSERROR("Failed to fork()"); | |
d5aa23e6 SH |
4576 | return false; |
4577 | } | |
b69dfc9f | 4578 | |
d5aa23e6 | 4579 | if (pid) { |
b69dfc9f CB |
4580 | ret = wait_for_pid(pid); |
4581 | if (ret != 0) { | |
4582 | ERROR("Failed to create device node"); | |
d5aa23e6 SH |
4583 | return false; |
4584 | } | |
b69dfc9f | 4585 | |
d5aa23e6 SH |
4586 | return true; |
4587 | } | |
4588 | ||
4589 | /* prepare the path */ | |
8a22c168 CB |
4590 | ret = snprintf(chrootpath, PATH_MAX, "/proc/%d/root", init_pid); |
4591 | if (ret < 0 || ret >= PATH_MAX) | |
d5aa23e6 SH |
4592 | return false; |
4593 | ||
b69dfc9f CB |
4594 | ret = chroot(chrootpath); |
4595 | if (ret < 0) | |
a7764ce7 | 4596 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4597 | |
4598 | ret = chdir("/"); | |
4599 | if (ret < 0) | |
a7764ce7 | 4600 | _exit(EXIT_FAILURE); |
b69dfc9f | 4601 | |
d5aa23e6 | 4602 | /* remove path if it exists */ |
b69dfc9f CB |
4603 | ret = faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW); |
4604 | if(ret == 0) { | |
4605 | ret = unlink(path); | |
c7d76c09 | 4606 | if (ret < 0) { |
6d1400b5 | 4607 | SYSERROR("Failed to remove \"%s\"", path); |
a7764ce7 | 4608 | _exit(EXIT_FAILURE); |
c7d76c09 | 4609 | } |
d5aa23e6 | 4610 | } |
b69dfc9f | 4611 | |
d5aa23e6 | 4612 | if (!add) |
a7764ce7 | 4613 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4614 | |
4615 | /* create any missing directories */ | |
b69dfc9f CB |
4616 | tmp = strdup(path); |
4617 | if (!tmp) | |
a7764ce7 | 4618 | _exit(EXIT_FAILURE); |
b69dfc9f CB |
4619 | |
4620 | directory_path = dirname(tmp); | |
4621 | ret = mkdir_p(directory_path, 0755); | |
4622 | if (ret < 0 && errno != EEXIST) { | |
6d1400b5 | 4623 | SYSERROR("Failed to create path \"%s\"", directory_path); |
b69dfc9f | 4624 | free(tmp); |
a7764ce7 | 4625 | _exit(EXIT_FAILURE); |
d5aa23e6 SH |
4626 | } |
4627 | ||
4628 | /* create the device node */ | |
b69dfc9f CB |
4629 | ret = mknod(path, st->st_mode, st->st_rdev); |
4630 | free(tmp); | |
c7d76c09 | 4631 | if (ret < 0) { |
6d1400b5 | 4632 | SYSERROR("Failed to create device node at \"%s\"", path); |
a7764ce7 | 4633 | _exit(EXIT_FAILURE); |
c7d76c09 | 4634 | } |
d5aa23e6 | 4635 | |
a7764ce7 | 4636 | _exit(EXIT_SUCCESS); |
d5aa23e6 SH |
4637 | } |
4638 | ||
f0ca2726 | 4639 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
4640 | { |
4641 | int ret; | |
4642 | struct stat st; | |
238b3e5e | 4643 | char value[LXC_MAX_BUFFER]; |
f0ca2726 | 4644 | const char *p; |
caab004f | 4645 | pid_t init_pid; |
a9a0ed90 ÇO |
4646 | |
4647 | /* make sure container is running */ | |
858377e4 | 4648 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 4649 | ERROR("container is not running"); |
d5aa23e6 | 4650 | return false; |
a9a0ed90 ÇO |
4651 | } |
4652 | ||
4653 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
4654 | p = dest_path ? dest_path : src_path; | |
4655 | ||
a9a0ed90 ÇO |
4656 | /* make sure we can access p */ |
4657 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 4658 | return false; |
a9a0ed90 ÇO |
4659 | |
4660 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 4661 | if (S_ISCHR(st.st_mode)) |
238b3e5e | 4662 | ret = snprintf(value, LXC_MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 4663 | else if (S_ISBLK(st.st_mode)) |
238b3e5e | 4664 | ret = snprintf(value, LXC_MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
a9a0ed90 | 4665 | else |
d5aa23e6 | 4666 | return false; |
a9a0ed90 ÇO |
4667 | |
4668 | /* check snprintf return code */ | |
238b3e5e | 4669 | if (ret < 0 || ret >= LXC_MAX_BUFFER) |
d5aa23e6 | 4670 | return false; |
a9a0ed90 | 4671 | |
caab004f TA |
4672 | init_pid = do_lxcapi_init_pid(c); |
4673 | if (init_pid < 0) { | |
4674 | ERROR("Failed to get init pid"); | |
4675 | return false; | |
4676 | } | |
4677 | ||
4678 | if (!do_add_remove_node(init_pid, p, add, &st)) | |
d5aa23e6 | 4679 | return false; |
a9a0ed90 | 4680 | |
d5aa23e6 | 4681 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 4682 | if (add) { |
858377e4 | 4683 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 4684 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 4685 | return false; |
a9a0ed90 ÇO |
4686 | } |
4687 | } else { | |
858377e4 | 4688 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 4689 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 4690 | return false; |
a9a0ed90 ÇO |
4691 | } |
4692 | } | |
d5aa23e6 | 4693 | |
a9a0ed90 | 4694 | return true; |
a9a0ed90 ÇO |
4695 | } |
4696 | ||
858377e4 | 4697 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 4698 | { |
e0010464 | 4699 | // cannot mknod if we're not privileged wrt init_user_ns |
5384e99d | 4700 | if (am_host_unpriv()) { |
238b3e5e | 4701 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4702 | return false; |
4703 | } | |
a73846d8 | 4704 | |
a9a0ed90 ÇO |
4705 | return add_remove_device_node(c, src_path, dest_path, true); |
4706 | } | |
4707 | ||
858377e4 SH |
4708 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
4709 | ||
4710 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 4711 | { |
e0010464 | 4712 | if (am_guest_unpriv()) { |
238b3e5e | 4713 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
c868b261 ÇO |
4714 | return false; |
4715 | } | |
a73846d8 | 4716 | |
a9a0ed90 ÇO |
4717 | return add_remove_device_node(c, src_path, dest_path, false); |
4718 | } | |
4719 | ||
858377e4 SH |
4720 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
4721 | ||
c7d76c09 CB |
4722 | static bool do_lxcapi_attach_interface(struct lxc_container *c, |
4723 | const char *ifname, | |
4724 | const char *dst_ifname) | |
e58fae8f | 4725 | { |
c7d76c09 | 4726 | pid_t init_pid; |
e58fae8f | 4727 | int ret = 0; |
c7d76c09 | 4728 | |
e0010464 | 4729 | if (am_guest_unpriv()) { |
238b3e5e | 4730 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4731 | return false; |
4732 | } | |
4733 | ||
4734 | if (!ifname) { | |
4735 | ERROR("No source interface name given"); | |
4736 | return false; | |
4737 | } | |
4738 | ||
4739 | ret = lxc_netdev_isup(ifname); | |
e5848d39 SH |
4740 | if (ret > 0) { |
4741 | /* netdev of ifname is up. */ | |
e58fae8f DY |
4742 | ret = lxc_netdev_down(ifname); |
4743 | if (ret) | |
4744 | goto err; | |
4745 | } | |
4746 | ||
c7d76c09 | 4747 | init_pid = do_lxcapi_init_pid(c); |
caab004f TA |
4748 | if (init_pid < 0) { |
4749 | ERROR("Failed to get init pid"); | |
4750 | goto err; | |
4751 | } | |
4752 | ||
c7d76c09 | 4753 | ret = lxc_netdev_move_by_name(ifname, init_pid, dst_ifname); |
e58fae8f DY |
4754 | if (ret) |
4755 | goto err; | |
4756 | ||
c7d76c09 | 4757 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, init_pid); |
e58fae8f | 4758 | return true; |
e5848d39 | 4759 | |
e58fae8f | 4760 | err: |
e58fae8f DY |
4761 | return false; |
4762 | } | |
4763 | ||
858377e4 SH |
4764 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
4765 | ||
c7d76c09 CB |
4766 | static bool do_lxcapi_detach_interface(struct lxc_container *c, |
4767 | const char *ifname, | |
4768 | const char *dst_ifname) | |
e58fae8f | 4769 | { |
c7d76c09 | 4770 | int ret; |
e58fae8f | 4771 | pid_t pid, pid_outside; |
e4103cf6 | 4772 | __do_free char *physname = NULL; |
e58fae8f | 4773 | |
e0010464 SH |
4774 | /* |
4775 | * TODO - if this is a physical device, then we need am_host_unpriv. | |
4776 | * But for other types guest privilege suffices. | |
4777 | */ | |
4778 | if (am_guest_unpriv()) { | |
238b3e5e | 4779 | ERROR(LXC_UNPRIV_EOPNOTSUPP, __FUNCTION__); |
e58fae8f DY |
4780 | return false; |
4781 | } | |
4782 | ||
4783 | if (!ifname) { | |
4784 | ERROR("No source interface name given"); | |
4785 | return false; | |
4786 | } | |
4787 | ||
0059379f | 4788 | pid_outside = lxc_raw_getpid(); |
e58fae8f DY |
4789 | pid = fork(); |
4790 | if (pid < 0) { | |
c7d76c09 | 4791 | ERROR("Failed to fork"); |
e58fae8f DY |
4792 | return false; |
4793 | } | |
4794 | ||
1a0e70ac | 4795 | if (pid == 0) { /* child */ |
acbfeda8 CB |
4796 | pid_t init_pid; |
4797 | ||
4798 | init_pid = do_lxcapi_init_pid(c); | |
caab004f TA |
4799 | if (init_pid < 0) { |
4800 | ERROR("Failed to get init pid"); | |
4801 | _exit(EXIT_FAILURE); | |
4802 | } | |
acbfeda8 CB |
4803 | if (!switch_to_ns(init_pid, "net")) { |
4804 | ERROR("Failed to enter network namespace"); | |
8d7b6c25 | 4805 | _exit(EXIT_FAILURE); |
e58fae8f DY |
4806 | } |
4807 | ||
e4103cf6 TP |
4808 | /* create new mount namespace for use with remounting /sys and is_wlan() below. */ |
4809 | ret = unshare(CLONE_NEWNS); | |
4810 | if (ret < 0) { | |
4811 | ERROR("Failed to unshare mount namespace"); | |
4812 | _exit(EXIT_FAILURE); | |
4813 | } | |
4814 | ||
4815 | /* set / recursively as private so that mount propagation doesn't affect us. */ | |
4816 | if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0) < 0) { | |
4817 | ERROR("Failed to recursively set / as private in mount namespace"); | |
4818 | _exit(EXIT_FAILURE); | |
4819 | } | |
4820 | ||
e58fae8f | 4821 | ret = lxc_netdev_isup(ifname); |
c7d76c09 CB |
4822 | if (ret < 0) { |
4823 | ERROR("Failed to determine whether network device \"%s\" is up", ifname); | |
8d7b6c25 | 4824 | _exit(EXIT_FAILURE); |
c7d76c09 | 4825 | } |
e58fae8f DY |
4826 | |
4827 | /* netdev of ifname is up. */ | |
4828 | if (ret) { | |
4829 | ret = lxc_netdev_down(ifname); | |
c7d76c09 CB |
4830 | if (ret) { |
4831 | ERROR("Failed to set network device \"%s\" down", ifname); | |
8d7b6c25 | 4832 | _exit(EXIT_FAILURE); |
c7d76c09 | 4833 | } |
e58fae8f DY |
4834 | } |
4835 | ||
e4103cf6 TP |
4836 | /* remount /sys so is_wlan() can check if this device is a wlan device. */ |
4837 | lxc_attach_remount_sys_proc(); | |
4838 | physname = is_wlan(ifname); | |
4839 | if (physname) | |
4840 | ret = lxc_netdev_move_wlan(physname, ifname, pid_outside, dst_ifname); | |
4841 | else | |
4842 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
4843 | ||
c7d76c09 CB |
4844 | /* -EINVAL means there is no netdev named as ifname. */ |
4845 | if (ret < 0) { | |
4846 | if (ret == -EINVAL) | |
4847 | ERROR("Network device \"%s\" not found", ifname); | |
4848 | else | |
4849 | ERROR("Failed to remove network device \"%s\"", ifname); | |
a73846d8 | 4850 | |
8d7b6c25 | 4851 | _exit(EXIT_FAILURE); |
e58fae8f | 4852 | } |
c7d76c09 | 4853 | |
8d7b6c25 | 4854 | _exit(EXIT_SUCCESS); |
e58fae8f DY |
4855 | } |
4856 | ||
c7d76c09 CB |
4857 | ret = wait_for_pid(pid); |
4858 | if (ret != 0) | |
e58fae8f DY |
4859 | return false; |
4860 | ||
c7d76c09 | 4861 | INFO("Moved network device \"%s\" to network namespace of %d", ifname, pid_outside); |
e58fae8f DY |
4862 | return true; |
4863 | } | |
4864 | ||
858377e4 SH |
4865 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
4866 | ||
aef3d51e TA |
4867 | static int do_lxcapi_migrate(struct lxc_container *c, unsigned int cmd, |
4868 | struct migrate_opts *opts, unsigned int size) | |
bbd4e13e | 4869 | { |
6b9be523 | 4870 | int ret = -1; |
2cb80427 | 4871 | struct migrate_opts *valid_opts = opts; |
b5b12b9e | 4872 | uint64_t features_to_check = 0; |
85c50991 | 4873 | |
aef3d51e TA |
4874 | /* If the caller has a bigger (newer) struct migrate_opts, let's make |
4875 | * sure that the stuff on the end is zero, i.e. that they didn't ask us | |
4876 | * to do anything special. | |
4877 | */ | |
4878 | if (size > sizeof(*opts)) { | |
4879 | unsigned char *addr; | |
4880 | unsigned char *end; | |
4881 | ||
4882 | addr = (void *)opts + sizeof(*opts); | |
4883 | end = (void *)opts + size; | |
a73846d8 | 4884 | |
4885 | for (; addr < end; addr++) | |
4886 | if (*addr) | |
aef3d51e | 4887 | return -E2BIG; |
85c50991 TA |
4888 | } |
4889 | ||
2cb80427 TA |
4890 | /* If the caller has a smaller struct, let's zero out the end for them |
4891 | * so we don't accidentally use bits of it that they didn't know about | |
4892 | * to initialize. | |
4893 | */ | |
4894 | if (size < sizeof(*opts)) { | |
4895 | valid_opts = malloc(sizeof(*opts)); | |
4896 | if (!valid_opts) | |
4897 | return -ENOMEM; | |
4898 | ||
4899 | memset(valid_opts, 0, sizeof(*opts)); | |
4900 | memcpy(valid_opts, opts, size); | |
4901 | } | |
4902 | ||
aef3d51e TA |
4903 | switch (cmd) { |
4904 | case MIGRATE_PRE_DUMP: | |
7ad13c91 TA |
4905 | if (!do_lxcapi_is_running(c)) { |
4906 | ERROR("container is not running"); | |
6b9be523 | 4907 | goto on_error; |
7ad13c91 | 4908 | } |
a73846d8 | 4909 | |
2cb80427 | 4910 | ret = !__criu_pre_dump(c, valid_opts); |
aef3d51e TA |
4911 | break; |
4912 | case MIGRATE_DUMP: | |
7ad13c91 TA |
4913 | if (!do_lxcapi_is_running(c)) { |
4914 | ERROR("container is not running"); | |
6b9be523 | 4915 | goto on_error; |
7ad13c91 | 4916 | } |
a73846d8 | 4917 | |
2cb80427 | 4918 | ret = !__criu_dump(c, valid_opts); |
aef3d51e TA |
4919 | break; |
4920 | case MIGRATE_RESTORE: | |
7ad13c91 TA |
4921 | if (do_lxcapi_is_running(c)) { |
4922 | ERROR("container is already running"); | |
6b9be523 | 4923 | goto on_error; |
7ad13c91 | 4924 | } |
a73846d8 | 4925 | |
2cb80427 | 4926 | ret = !__criu_restore(c, valid_opts); |
aef3d51e | 4927 | break; |
b5b12b9e AR |
4928 | case MIGRATE_FEATURE_CHECK: |
4929 | features_to_check = valid_opts->features_to_check; | |
4930 | ret = !__criu_check_feature(&features_to_check); | |
4931 | if (ret) { | |
4932 | /* Something went wrong. Let's let the caller | |
4933 | * know which feature checks failed. */ | |
4934 | valid_opts->features_to_check = features_to_check; | |
4935 | } | |
4936 | break; | |
aef3d51e TA |
4937 | default: |
4938 | ERROR("invalid migrate command %u", cmd); | |
4939 | ret = -EINVAL; | |
4940 | } | |
735f2c6e | 4941 | |
6b9be523 | 4942 | on_error: |
f686506d TA |
4943 | if (size < sizeof(*opts)) |
4944 | free(valid_opts); | |
4945 | ||
aef3d51e TA |
4946 | return ret; |
4947 | } | |
735f2c6e | 4948 | |
aef3d51e | 4949 | WRAP_API_3(int, lxcapi_migrate, unsigned int, struct migrate_opts *, unsigned int) |
735f2c6e | 4950 | |
aef3d51e TA |
4951 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) |
4952 | { | |
ebb088e1 AR |
4953 | struct migrate_opts opts; |
4954 | ||
4955 | memset(&opts, 0, sizeof(opts)); | |
4956 | ||
4957 | opts.directory = directory; | |
4958 | opts.stop = stop; | |
4959 | opts.verbose = verbose; | |
735f2c6e | 4960 | |
aef3d51e | 4961 | return !do_lxcapi_migrate(c, MIGRATE_DUMP, &opts, sizeof(opts)); |
735f2c6e TA |
4962 | } |
4963 | ||
858377e4 SH |
4964 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4965 | ||
4966 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee | 4967 | { |
ebb088e1 AR |
4968 | struct migrate_opts opts; |
4969 | ||
4970 | memset(&opts, 0, sizeof(opts)); | |
4971 | ||
4972 | opts.directory = directory; | |
4973 | opts.verbose = verbose; | |
c9d8f2ee | 4974 | |
aef3d51e | 4975 | return !do_lxcapi_migrate(c, MIGRATE_RESTORE, &opts, sizeof(opts)); |
735f2c6e TA |
4976 | } |
4977 | ||
858377e4 SH |
4978 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4979 | ||
1f5a90f9 CB |
4980 | /* @st_mode is the st_mode field of the stat(source) return struct */ |
4981 | static int create_mount_target(const char *dest, mode_t st_mode) | |
4982 | { | |
4983 | char *dirdup, *destdirname; | |
4984 | int ret; | |
4985 | ||
4986 | dirdup = strdup(dest); | |
4987 | if (!dirdup) { | |
4988 | SYSERROR("Failed to duplicate target name \"%s\"", dest); | |
4989 | return -1; | |
4990 | } | |
4991 | destdirname = dirname(dirdup); | |
4992 | ||
4993 | ret = mkdir_p(destdirname, 0755); | |
4994 | if (ret < 0) { | |
4995 | SYSERROR("Failed to create \"%s\"", destdirname); | |
4996 | free(dirdup); | |
4997 | return ret; | |
4998 | } | |
4999 | free(dirdup); | |
5000 | ||
5001 | (void)remove(dest); | |
5002 | ||
5003 | if (S_ISDIR(st_mode)) | |
5004 | ret = mkdir(dest, 0000); | |
5005 | else | |
5006 | ret = mknod(dest, S_IFREG | 0000, 0); | |
71521317 SG |
5007 | |
5008 | if (ret == 0) | |
5009 | TRACE("Created mount target \"%s\"", dest); | |
d8bc14a7 | 5010 | else if (ret < 0 && errno != EEXIST) { |
1f5a90f9 CB |
5011 | SYSERROR("Failed to create mount target \"%s\"", dest); |
5012 | return -1; | |
5013 | } | |
5014 | ||
5015 | return 0; | |
5016 | } | |
5017 | ||
3340f441 CB |
5018 | static int do_lxcapi_mount(struct lxc_container *c, const char *source, |
5019 | const char *target, const char *filesystemtype, | |
5020 | unsigned long mountflags, const void *data, | |
5021 | struct lxc_mount *mnt) | |
5022 | { | |
29df56cd | 5023 | char *suff, *sret; |
8a22c168 | 5024 | char template[PATH_MAX], path[PATH_MAX]; |
29df56cd | 5025 | pid_t pid, init_pid; |
c6885c3f | 5026 | struct stat sb; |
ecce75a6 | 5027 | bool is_dir; |
29df56cd LT |
5028 | int ret = -1, fd = -EBADF; |
5029 | ||
5030 | if (!c || !c->lxc_conf) { | |
5031 | ERROR("Container or configuration is NULL"); | |
5032 | return -EINVAL; | |
5033 | } | |
5034 | ||
7a41e857 | 5035 | if (!c->lxc_conf->shmount.path_host) { |
29df56cd LT |
5036 | ERROR("Host path to shared mountpoint must be specified in the config\n"); |
5037 | return -EINVAL; | |
5038 | } | |
29df56cd | 5039 | |
60534030 LT |
5040 | ret = snprintf(template, sizeof(template), "%s/.lxcmount_XXXXXX", c->lxc_conf->shmount.path_host); |
5041 | if (ret < 0 || (size_t)ret >= sizeof(template)) { | |
29df56cd LT |
5042 | SYSERROR("Error writing shmounts tempdir name"); |
5043 | goto out; | |
5044 | } | |
5045 | ||
c6885c3f LT |
5046 | /* Create a temporary file / dir under the shared mountpoint */ |
5047 | if (!source || strcmp(source, "") == 0) { | |
5048 | /* If source is not specified, maybe we want to mount a filesystem? */ | |
5049 | sb.st_mode = S_IFDIR; | |
5050 | } else { | |
5051 | ret = stat(source, &sb); | |
5052 | if (ret < 0) { | |
5053 | SYSERROR("Error getting stat info about the source \"%s\"", source); | |
5054 | goto out; | |
5055 | } | |
5056 | } | |
5057 | ||
ecce75a6 CB |
5058 | is_dir = (S_ISDIR(sb.st_mode) != 0); |
5059 | if (is_dir) { | |
c6885c3f LT |
5060 | sret = mkdtemp(template); |
5061 | if (!sret) { | |
5062 | SYSERROR("Could not create shmounts temporary dir"); | |
5063 | goto out; | |
5064 | } | |
c6885c3f LT |
5065 | } else { |
5066 | fd = lxc_make_tmpfile(template, false); | |
5067 | if (fd < 0) { | |
5068 | SYSERROR("Could not create shmounts temporary file"); | |
5069 | goto out; | |
5070 | } | |
29df56cd LT |
5071 | } |
5072 | ||
5073 | /* Do the fork */ | |
5074 | pid = fork(); | |
5075 | if (pid < 0) { | |
5076 | SYSERROR("Could not fork"); | |
5077 | goto out; | |
5078 | } | |
5079 | ||
5080 | if (pid == 0) { | |
5081 | /* Do the mount */ | |
5082 | ret = mount(source, template, filesystemtype, mountflags, data); | |
5083 | if (ret < 0) { | |
c6885c3f | 5084 | SYSERROR("Failed to mount onto \"%s\"", template); |
29df56cd LT |
5085 | _exit(EXIT_FAILURE); |
5086 | } | |
3340f441 | 5087 | TRACE("Mounted \"%s\" onto \"%s\"", source, template); |
29df56cd LT |
5088 | |
5089 | init_pid = do_lxcapi_init_pid(c); | |
5090 | if (init_pid < 0) { | |
5091 | ERROR("Failed to obtain container's init pid"); | |
5092 | _exit(EXIT_FAILURE); | |
5093 | } | |
5094 | ||
5095 | /* Enter the container namespaces */ | |
5096 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
4e5a9657 | 5097 | if (!switch_to_ns(init_pid, "user")) { |
29df56cd LT |
5098 | ERROR("Failed to enter user namespace"); |
5099 | _exit(EXIT_FAILURE); | |
5100 | } | |
4e5a9657 CB |
5101 | |
5102 | if (!lxc_switch_uid_gid(0, 0)) | |
5103 | _exit(EXIT_FAILURE); | |
29df56cd | 5104 | } |
3340f441 | 5105 | |
29df56cd LT |
5106 | if (!switch_to_ns(init_pid, "mnt")) { |
5107 | ERROR("Failed to enter mount namespace"); | |
5108 | _exit(EXIT_FAILURE); | |
5109 | } | |
5110 | ||
71521317 SG |
5111 | ret = create_mount_target(target, sb.st_mode); |
5112 | if (ret < 0) | |
5113 | _exit(EXIT_FAILURE); | |
c6885c3f | 5114 | |
29df56cd LT |
5115 | suff = strrchr(template, '/'); |
5116 | if (!suff) | |
1f77c35e | 5117 | goto cleanup_target_in_child; |
29df56cd | 5118 | |
60534030 LT |
5119 | ret = snprintf(path, sizeof(path), "%s%s", c->lxc_conf->shmount.path_cont, suff); |
5120 | if (ret < 0 || (size_t)ret >= sizeof(path)) { | |
29df56cd | 5121 | SYSERROR("Error writing container mountpoint name"); |
1f77c35e | 5122 | goto cleanup_target_in_child; |
29df56cd LT |
5123 | } |
5124 | ||
3340f441 | 5125 | ret = mount(path, target, NULL, MS_MOVE | MS_REC, NULL); |
29df56cd LT |
5126 | if (ret < 0) { |
5127 | SYSERROR("Failed to move the mount from \"%s\" to \"%s\"", path, target); | |
1f77c35e | 5128 | goto cleanup_target_in_child; |
29df56cd | 5129 | } |
3340f441 | 5130 | TRACE("Moved mount from \"%s\" to \"%s\"", path, target); |
29df56cd LT |
5131 | |
5132 | _exit(EXIT_SUCCESS); | |
1f77c35e CB |
5133 | |
5134 | cleanup_target_in_child: | |
5135 | (void)remove(target); | |
5136 | _exit(EXIT_FAILURE); | |
29df56cd LT |
5137 | } |
5138 | ||
5139 | ret = wait_for_pid(pid); | |
1f77c35e CB |
5140 | if (ret < 0) |
5141 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5142 | else | |
5143 | ret = 0; | |
29df56cd | 5144 | |
1f77c35e CB |
5145 | if (umount2(template, MNT_DETACH)) |
5146 | SYSWARN("Failed to remove temporary mount \"%s\"", template); | |
29df56cd | 5147 | |
ecce75a6 CB |
5148 | if (is_dir) |
5149 | (void)rmdir(template); | |
5150 | else | |
5151 | (void)unlink(template); | |
29df56cd LT |
5152 | |
5153 | out: | |
5154 | if (fd >= 0) | |
5155 | close(fd); | |
3340f441 | 5156 | |
29df56cd LT |
5157 | return ret; |
5158 | } | |
5159 | ||
5160 | WRAP_API_6(int, lxcapi_mount, const char *, const char *, const char *, | |
d83da817 LT |
5161 | unsigned long, const void *, struct lxc_mount *) |
5162 | ||
5163 | static int do_lxcapi_umount(struct lxc_container *c, const char *target, | |
7a41e857 | 5164 | unsigned long flags, struct lxc_mount *mnt) |
d83da817 LT |
5165 | { |
5166 | pid_t pid, init_pid; | |
5167 | int ret = -1; | |
5168 | ||
5169 | if (!c || !c->lxc_conf) { | |
5170 | ERROR("Container or configuration is NULL"); | |
5171 | return -EINVAL; | |
5172 | } | |
5173 | ||
5174 | /* Do the fork */ | |
5175 | pid = fork(); | |
5176 | if (pid < 0) { | |
5177 | SYSERROR("Could not fork"); | |
5178 | return -1; | |
5179 | } | |
5180 | ||
5181 | if (pid == 0) { | |
5182 | init_pid = do_lxcapi_init_pid(c); | |
5183 | if (init_pid < 0) { | |
5184 | ERROR("Failed to obtain container's init pid"); | |
5185 | _exit(EXIT_FAILURE); | |
5186 | } | |
5187 | ||
5188 | /* Enter the container namespaces */ | |
5189 | if (!lxc_list_empty(&c->lxc_conf->id_map)) { | |
5190 | if (!switch_to_ns(init_pid, "user")) { | |
5191 | ERROR("Failed to enter user namespace"); | |
5192 | _exit(EXIT_FAILURE); | |
5193 | } | |
5194 | } | |
5195 | ||
5196 | if (!switch_to_ns(init_pid, "mnt")) { | |
5197 | ERROR("Failed to enter mount namespace"); | |
5198 | _exit(EXIT_FAILURE); | |
5199 | } | |
5200 | ||
5201 | /* Do the unmount */ | |
7a41e857 | 5202 | ret = umount2(target, flags); |
d83da817 LT |
5203 | if (ret < 0) { |
5204 | SYSERROR("Failed to umount \"%s\"", target); | |
5205 | _exit(EXIT_FAILURE); | |
5206 | } | |
5207 | ||
5208 | _exit(EXIT_SUCCESS); | |
5209 | } | |
5210 | ||
5211 | ret = wait_for_pid(pid); | |
5212 | if (ret < 0) { | |
5213 | SYSERROR("Wait for the child with pid %ld failed", (long)pid); | |
5214 | return -ret; | |
5215 | } | |
5216 | ||
5217 | return 0; | |
5218 | } | |
5219 | ||
5220 | WRAP_API_3(int, lxcapi_umount, const char *, unsigned long, struct lxc_mount*) | |
29df56cd | 5221 | |
a0e93eeb CS |
5222 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
5223 | { | |
5224 | va_list ap; | |
5225 | const char **argv; | |
5226 | int ret; | |
5227 | ||
5228 | if (!c) | |
5229 | return -1; | |
5230 | ||
858377e4 SH |
5231 | current_config = c->lxc_conf; |
5232 | ||
a0e93eeb CS |
5233 | va_start(ap, arg); |
5234 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
5235 | va_end(ap); | |
5236 | ||
5237 | if (!argv) { | |
5238 | ERROR("Memory allocation error."); | |
858377e4 SH |
5239 | ret = -1; |
5240 | goto out; | |
a0e93eeb CS |
5241 | } |
5242 | argv[0] = arg; | |
5243 | ||
858377e4 | 5244 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 5245 | free((void*)argv); |
a73846d8 | 5246 | |
858377e4 SH |
5247 | out: |
5248 | current_config = NULL; | |
a0e93eeb CS |
5249 | return ret; |
5250 | } | |
5251 | ||
679289bf | 5252 | static int do_lxcapi_seccomp_notify_fd(struct lxc_container *c) |
cdb2a47f | 5253 | { |
cdb2a47f | 5254 | if (!c || !c->lxc_conf) |
b18f6aac | 5255 | return ret_set_errno(-1, -EINVAL); |
cdb2a47f | 5256 | |
679289bf | 5257 | return lxc_seccomp_get_notify_fd(&c->lxc_conf->seccomp); |
cdb2a47f CB |
5258 | } |
5259 | ||
679289bf | 5260 | WRAP_API(int, lxcapi_seccomp_notify_fd) |
cdb2a47f | 5261 | |
afeecbba | 5262 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
5263 | { |
5264 | struct lxc_container *c; | |
cbb9c7c7 | 5265 | size_t len; |
9fbe07f6 | 5266 | int rc; |
72d0e1cb | 5267 | |
18aa217b SH |
5268 | if (!name) |
5269 | return NULL; | |
5270 | ||
72d0e1cb SG |
5271 | c = malloc(sizeof(*c)); |
5272 | if (!c) { | |
e9e29a33 | 5273 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5274 | return NULL; |
5275 | } | |
5276 | memset(c, 0, sizeof(*c)); | |
5277 | ||
afeecbba SH |
5278 | if (configpath) |
5279 | c->config_path = strdup(configpath); | |
5280 | else | |
593e8478 | 5281 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
2a59a681 | 5282 | if (!c->config_path) { |
e9e29a33 | 5283 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
2a59a681 SH |
5284 | goto err; |
5285 | } | |
5286 | ||
f5dd1d53 | 5287 | remove_trailing_slashes(c->config_path); |
cbb9c7c7 DJ |
5288 | |
5289 | len = strlen(name); | |
5290 | c->name = malloc(len + 1); | |
72d0e1cb | 5291 | if (!c->name) { |
e9e29a33 | 5292 | fprintf(stderr, "Failed to allocate memory for %s\n", name); |
72d0e1cb SG |
5293 | goto err; |
5294 | } | |
cbb9c7c7 | 5295 | (void)strlcpy(c->name, name, len + 1); |
72d0e1cb SG |
5296 | |
5297 | c->numthreads = 1; | |
e9e29a33 CB |
5298 | c->slock = lxc_newlock(c->config_path, name); |
5299 | if (!c->slock) { | |
5300 | fprintf(stderr, "Failed to create lock for %s\n", name); | |
72d0e1cb SG |
5301 | goto err; |
5302 | } | |
5303 | ||
e9e29a33 CB |
5304 | c->privlock = lxc_newlock(NULL, NULL); |
5305 | if (!c->privlock) { | |
5306 | fprintf(stderr, "Failed to create private lock for %s\n", name); | |
72d0e1cb SG |
5307 | goto err; |
5308 | } | |
5309 | ||
afeecbba | 5310 | if (!set_config_filename(c)) { |
e9e29a33 | 5311 | fprintf(stderr, "Failed to create config file name for %s\n", name); |
72d0e1cb SG |
5312 | goto err; |
5313 | } | |
72d0e1cb | 5314 | |
e9e29a33 CB |
5315 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) { |
5316 | fprintf(stderr, "Failed to load config for %s\n", name); | |
bac806d1 | 5317 | goto err; |
e9e29a33 | 5318 | } |
72d0e1cb | 5319 | |
9fbe07f6 RK |
5320 | rc = ongoing_create(c); |
5321 | switch (rc) { | |
5322 | case LXC_CREATE_INCOMPLETE: | |
5323 | SYSERROR("Failed to complete container creation for %s", c->name); | |
17a367d8 | 5324 | container_destroy(c, NULL); |
4df7f012 | 5325 | lxcapi_clear_config(c); |
9fbe07f6 RK |
5326 | break; |
5327 | case LXC_CREATE_ONGOING: | |
5328 | /* container creation going on */ | |
5329 | break; | |
5330 | case LXC_CREATE_FAILED: | |
5331 | /* container creation failed */ | |
5332 | if (errno != EACCES && errno != EPERM) { | |
5333 | /* insufficient privileges */ | |
5334 | SYSERROR("Failed checking for incomplete container %s creation", c->name); | |
5335 | goto err; | |
5336 | } | |
5337 | break; | |
3e625e2d | 5338 | } |
a73846d8 | 5339 | |
a2739df5 | 5340 | c->daemonize = true; |
72cf75fa | 5341 | c->pidfile = NULL; |
3e625e2d | 5342 | |
1a0e70ac | 5343 | /* Assign the member functions. */ |
72d0e1cb SG |
5344 | c->is_defined = lxcapi_is_defined; |
5345 | c->state = lxcapi_state; | |
5346 | c->is_running = lxcapi_is_running; | |
5347 | c->freeze = lxcapi_freeze; | |
5348 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 5349 | c->console = lxcapi_console; |
b5159817 | 5350 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
5351 | c->init_pid = lxcapi_init_pid; |
5352 | c->load_config = lxcapi_load_config; | |
5353 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 5354 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
5355 | c->start = lxcapi_start; |
5356 | c->startl = lxcapi_startl; | |
5357 | c->stop = lxcapi_stop; | |
5358 | c->config_file_name = lxcapi_config_file_name; | |
5359 | c->wait = lxcapi_wait; | |
5360 | c->set_config_item = lxcapi_set_config_item; | |
5361 | c->destroy = lxcapi_destroy; | |
18aa217b | 5362 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 5363 | c->rename = lxcapi_rename; |
72d0e1cb SG |
5364 | c->save_config = lxcapi_save_config; |
5365 | c->get_keys = lxcapi_get_keys; | |
5366 | c->create = lxcapi_create; | |
5367 | c->createl = lxcapi_createl; | |
5368 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 5369 | c->reboot = lxcapi_reboot; |
d39b10eb | 5370 | c->reboot2 = lxcapi_reboot2; |
4df7f012 | 5371 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
5372 | c->clear_config_item = lxcapi_clear_config_item; |
5373 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 5374 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
5375 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
5376 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
5377 | c->get_config_path = lxcapi_get_config_path; |
5378 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 5379 | c->clone = lxcapi_clone; |
799f29ab | 5380 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 5381 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
5382 | c->attach = lxcapi_attach; |
5383 | c->attach_run_wait = lxcapi_attach_run_wait; | |
5384 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
5385 | c->snapshot = lxcapi_snapshot; |
5386 | c->snapshot_list = lxcapi_snapshot_list; | |
5387 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 5388 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 5389 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 5390 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
5391 | c->add_device_node = lxcapi_add_device_node; |
5392 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
5393 | c->attach_interface = lxcapi_attach_interface; |
5394 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
5395 | c->checkpoint = lxcapi_checkpoint; |
5396 | c->restore = lxcapi_restore; | |
aef3d51e | 5397 | c->migrate = lxcapi_migrate; |
191d43cc | 5398 | c->console_log = lxcapi_console_log; |
29df56cd | 5399 | c->mount = lxcapi_mount; |
d83da817 | 5400 | c->umount = lxcapi_umount; |
679289bf | 5401 | c->seccomp_notify_fd = lxcapi_seccomp_notify_fd; |
72d0e1cb | 5402 | |
72d0e1cb SG |
5403 | return c; |
5404 | ||
5405 | err: | |
5406 | lxc_container_free(c); | |
5407 | return NULL; | |
5408 | } | |
5409 | ||
4a7c7daa | 5410 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
5411 | { |
5412 | int i; | |
5413 | ||
5414 | if (states) | |
5415 | for (i=0; i<MAX_STATE; i++) | |
5416 | states[i] = lxc_state2str(i); | |
a73846d8 | 5417 | |
72d0e1cb SG |
5418 | return MAX_STATE; |
5419 | } | |
a41f104b | 5420 | |
a41f104b SH |
5421 | /* |
5422 | * These next two could probably be done smarter with reusing a common function | |
5423 | * with different iterators and tests... | |
5424 | */ | |
5425 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
5426 | { | |
4110345b | 5427 | __do_closedir DIR *dir = NULL; |
a41f104b | 5428 | int i, cfound = 0, nfound = 0; |
74f96976 | 5429 | struct dirent *direntp; |
a41f104b SH |
5430 | struct lxc_container *c; |
5431 | ||
5432 | if (!lxcpath) | |
593e8478 | 5433 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 5434 | |
a41f104b | 5435 | dir = opendir(lxcpath); |
a41f104b SH |
5436 | if (!dir) { |
5437 | SYSERROR("opendir on lxcpath"); | |
5438 | return -1; | |
5439 | } | |
5440 | ||
5441 | if (cret) | |
5442 | *cret = NULL; | |
a73846d8 | 5443 | |
a41f104b SH |
5444 | if (names) |
5445 | *names = NULL; | |
5446 | ||
74f96976 | 5447 | while ((direntp = readdir(dir))) { |
1a0e70ac | 5448 | /* Ignore '.', '..' and any hidden directory. */ |
e4ebeab1 | 5449 | if (!strncmp(direntp->d_name, ".", 1)) |
a41f104b SH |
5450 | continue; |
5451 | ||
5452 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
5453 | continue; | |
5454 | ||
a73846d8 | 5455 | if (names) |
9c88ff1f | 5456 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b | 5457 | goto free_bad; |
a73846d8 | 5458 | |
a41f104b SH |
5459 | cfound++; |
5460 | ||
5461 | if (!cret) { | |
5462 | nfound++; | |
5463 | continue; | |
5464 | } | |
5465 | ||
5466 | c = lxc_container_new(direntp->d_name, lxcpath); | |
5467 | if (!c) { | |
5468 | INFO("Container %s:%s has a config but could not be loaded", | |
5469 | lxcpath, direntp->d_name); | |
a73846d8 | 5470 | |
a41f104b | 5471 | if (names) |
9c88ff1f ÇO |
5472 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5473 | goto free_bad; | |
a73846d8 | 5474 | |
a41f104b SH |
5475 | continue; |
5476 | } | |
a73846d8 | 5477 | |
858377e4 | 5478 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
5479 | INFO("Container %s:%s has a config but is not defined", |
5480 | lxcpath, direntp->d_name); | |
a73846d8 | 5481 | |
a41f104b | 5482 | if (names) |
9c88ff1f ÇO |
5483 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
5484 | goto free_bad; | |
a73846d8 | 5485 | |
a41f104b SH |
5486 | lxc_container_put(c); |
5487 | continue; | |
5488 | } | |
5489 | ||
2871830a | 5490 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
5491 | lxc_container_put(c); |
5492 | goto free_bad; | |
5493 | } | |
a73846d8 | 5494 | |
a41f104b SH |
5495 | nfound++; |
5496 | } | |
5497 | ||
a41f104b SH |
5498 | return nfound; |
5499 | ||
5500 | free_bad: | |
5501 | if (names && *names) { | |
4110345b | 5502 | for (i = 0; i < cfound; i++) |
a41f104b SH |
5503 | free((*names)[i]); |
5504 | free(*names); | |
5505 | } | |
a73846d8 | 5506 | |
a41f104b | 5507 | if (cret && *cret) { |
4110345b | 5508 | for (i = 0; i < nfound; i++) |
a41f104b SH |
5509 | lxc_container_put((*cret)[i]); |
5510 | free(*cret); | |
5511 | } | |
a73846d8 | 5512 | |
a41f104b SH |
5513 | return -1; |
5514 | } | |
5515 | ||
148a9d27 DE |
5516 | int list_active_containers(const char *lxcpath, char ***nret, |
5517 | struct lxc_container ***cret) | |
a41f104b | 5518 | { |
148a9d27 | 5519 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
5520 | int lxcpath_len; |
5521 | char *line = NULL; | |
148a9d27 | 5522 | char **ct_name = NULL; |
a41f104b | 5523 | size_t len = 0; |
97bc2422 | 5524 | struct lxc_container *c = NULL; |
88556fd7 | 5525 | bool is_hashed; |
a41f104b SH |
5526 | |
5527 | if (!lxcpath) | |
593e8478 | 5528 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
5529 | lxcpath_len = strlen(lxcpath); |
5530 | ||
5531 | if (cret) | |
5532 | *cret = NULL; | |
a73846d8 | 5533 | |
148a9d27 DE |
5534 | if (nret) |
5535 | *nret = NULL; | |
a41f104b | 5536 | |
4110345b | 5537 | FILE *f = fopen("/proc/net/unix", "re"); |
a41f104b SH |
5538 | if (!f) |
5539 | return -1; | |
5540 | ||
5541 | while (getline(&line, &len, f) != -1) { | |
0f8f9c8a | 5542 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
5543 | if (!p) |
5544 | continue; | |
5545 | p++; | |
a73846d8 | 5546 | |
a41f104b SH |
5547 | if (*p != 0x40) |
5548 | continue; | |
5549 | p++; | |
88556fd7 ÇO |
5550 | |
5551 | is_hashed = false; | |
a73846d8 | 5552 | |
88556fd7 ÇO |
5553 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { |
5554 | p += lxcpath_len; | |
5555 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
5556 | p += 4; | |
5557 | is_hashed = true; | |
5558 | } else { | |
a41f104b | 5559 | continue; |
88556fd7 ÇO |
5560 | } |
5561 | ||
a41f104b SH |
5562 | while (*p == '/') |
5563 | p++; | |
5564 | ||
1a0e70ac | 5565 | /* Now p is the start of lxc_name. */ |
46cd2845 | 5566 | p2 = strchr(p, '/'); |
a41f104b SH |
5567 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
5568 | continue; | |
5569 | *p2 = '\0'; | |
5570 | ||
88556fd7 | 5571 | if (is_hashed) { |
899a9f55 CB |
5572 | char *recvpath = lxc_cmd_get_lxcpath(p); |
5573 | if (!recvpath) | |
5574 | continue; | |
a73846d8 | 5575 | |
e07eafa8 L |
5576 | if (strncmp(lxcpath, recvpath, lxcpath_len) != 0) { |
5577 | free(recvpath); | |
88556fd7 | 5578 | continue; |
e07eafa8 L |
5579 | } |
5580 | free(recvpath); | |
a73846d8 | 5581 | |
88556fd7 | 5582 | p = lxc_cmd_get_name(p); |
ee2d7093 L |
5583 | if (!p) |
5584 | continue; | |
88556fd7 ÇO |
5585 | } |
5586 | ||
e07eafa8 L |
5587 | if (array_contains(&ct_name, p, ct_name_cnt)) { |
5588 | if (is_hashed) | |
5589 | free(p); | |
9c88ff1f | 5590 | continue; |
e07eafa8 | 5591 | } |
9c88ff1f | 5592 | |
e07eafa8 L |
5593 | if (!add_to_array(&ct_name, p, ct_name_cnt)) { |
5594 | if (is_hashed) | |
5595 | free(p); | |
148a9d27 | 5596 | goto free_cret_list; |
e07eafa8 | 5597 | } |
9c88ff1f | 5598 | |
148a9d27 | 5599 | ct_name_cnt++; |
a41f104b | 5600 | |
e07eafa8 L |
5601 | if (!cret) { |
5602 | if (is_hashed) | |
5603 | free(p); | |
a41f104b | 5604 | continue; |
e07eafa8 | 5605 | } |
a41f104b SH |
5606 | |
5607 | c = lxc_container_new(p, lxcpath); | |
5608 | if (!c) { | |
5609 | INFO("Container %s:%s is running but could not be loaded", | |
5610 | lxcpath, p); | |
a73846d8 | 5611 | |
148a9d27 | 5612 | remove_from_array(&ct_name, p, ct_name_cnt--); |
e07eafa8 L |
5613 | if (is_hashed) |
5614 | free(p); | |
a73846d8 | 5615 | |
a41f104b SH |
5616 | continue; |
5617 | } | |
5618 | ||
e07eafa8 L |
5619 | if (is_hashed) |
5620 | free(p); | |
5621 | ||
a41f104b SH |
5622 | /* |
5623 | * If this is an anonymous container, then is_defined *can* | |
5624 | * return false. So we don't do that check. Count on the | |
5625 | * fact that the command socket exists. | |
5626 | */ | |
5627 | ||
148a9d27 | 5628 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 5629 | lxc_container_put(c); |
148a9d27 | 5630 | goto free_cret_list; |
a41f104b | 5631 | } |
a73846d8 | 5632 | |
148a9d27 | 5633 | cret_cnt++; |
a41f104b SH |
5634 | } |
5635 | ||
97bc2422 CB |
5636 | if (nret && cret && cret_cnt != ct_name_cnt) { |
5637 | if (c) | |
5638 | lxc_container_put(c); | |
5639 | goto free_cret_list; | |
5640 | } | |
5641 | ||
148a9d27 DE |
5642 | ret = ct_name_cnt; |
5643 | if (nret) | |
5644 | *nret = ct_name; | |
5645 | else | |
5646 | goto free_ct_name; | |
a73846d8 | 5647 | |
148a9d27 | 5648 | goto out; |
a41f104b | 5649 | |
148a9d27 | 5650 | free_cret_list: |
a41f104b | 5651 | if (cret && *cret) { |
148a9d27 | 5652 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
5653 | lxc_container_put((*cret)[i]); |
5654 | free(*cret); | |
5655 | } | |
148a9d27 DE |
5656 | |
5657 | free_ct_name: | |
5658 | if (ct_name) { | |
5659 | for (i = 0; i < ct_name_cnt; i++) | |
5660 | free(ct_name[i]); | |
5661 | free(ct_name); | |
5662 | } | |
5663 | ||
5664 | out: | |
f10fad2f | 5665 | free(line); |
a41f104b | 5666 | fclose(f); |
148a9d27 | 5667 | return ret; |
a41f104b | 5668 | } |
2871830a DE |
5669 | |
5670 | int list_all_containers(const char *lxcpath, char ***nret, | |
5671 | struct lxc_container ***cret) | |
5672 | { | |
5673 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
5674 | char **active_name; | |
5675 | char **ct_name; | |
5676 | struct lxc_container **ct_list = NULL; | |
5677 | ||
5678 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
5679 | if (ct_cnt < 0) | |
5680 | return ct_cnt; | |
5681 | ||
5682 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
5683 | if (active_cnt < 0) { | |
5684 | ret = active_cnt; | |
5685 | goto free_ct_name; | |
5686 | } | |
5687 | ||
5688 | for (i = 0; i < active_cnt; i++) { | |
5689 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
5690 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
5691 | ret = -1; | |
5692 | goto free_active_name; | |
5693 | } | |
a73846d8 | 5694 | |
2871830a DE |
5695 | ct_cnt++; |
5696 | } | |
a73846d8 | 5697 | |
2871830a DE |
5698 | free(active_name[i]); |
5699 | active_name[i] = NULL; | |
5700 | } | |
a73846d8 | 5701 | |
2871830a DE |
5702 | free(active_name); |
5703 | active_name = NULL; | |
5704 | active_cnt = 0; | |
5705 | ||
5706 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
5707 | struct lxc_container *c; | |
5708 | ||
5709 | c = lxc_container_new(ct_name[i], lxcpath); | |
5710 | if (!c) { | |
5711 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
5712 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
5713 | continue; | |
5714 | } | |
5715 | ||
5716 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
5717 | lxc_container_put(c); | |
5718 | ret = -1; | |
5719 | goto free_ct_list; | |
5720 | } | |
a73846d8 | 5721 | |
2871830a DE |
5722 | ct_list_cnt++; |
5723 | } | |
5724 | ||
5725 | if (cret) | |
5726 | *cret = ct_list; | |
5727 | ||
a73846d8 | 5728 | if (nret) { |
2871830a | 5729 | *nret = ct_name; |
a73846d8 | 5730 | } else { |
2871830a DE |
5731 | ret = ct_cnt; |
5732 | goto free_ct_name; | |
5733 | } | |
a73846d8 | 5734 | |
2871830a DE |
5735 | return ct_cnt; |
5736 | ||
5737 | free_ct_list: | |
5738 | for (i = 0; i < ct_list_cnt; i++) { | |
5739 | lxc_container_put(ct_list[i]); | |
5740 | } | |
f10fad2f | 5741 | free(ct_list); |
2871830a DE |
5742 | |
5743 | free_active_name: | |
5744 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 5745 | free(active_name[i]); |
2871830a | 5746 | } |
f10fad2f | 5747 | free(active_name); |
2871830a DE |
5748 | |
5749 | free_ct_name: | |
5750 | for (i = 0; i < ct_cnt; i++) { | |
5751 | free(ct_name[i]); | |
5752 | } | |
5753 | free(ct_name); | |
5754 | return ret; | |
5755 | } | |
12461428 CB |
5756 | |
5757 | bool lxc_config_item_is_supported(const char *key) | |
5758 | { | |
300df83e | 5759 | return !!lxc_get_config(key); |
12461428 | 5760 | } |
aafa5f96 CB |
5761 | |
5762 | bool lxc_has_api_extension(const char *extension) | |
5763 | { | |
5764 | /* The NULL API extension is always present. :) */ | |
5765 | if (!extension) | |
5766 | return true; | |
5767 | ||
5768 | for (size_t i = 0; i < nr_api_extensions; i++) | |
5769 | if (strcmp(api_extensions[i], extension) == 0) | |
5770 | return true; | |
5771 | ||
5772 | return false; | |
5773 | } |