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Commit | Line | Data |
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72d0e1cb SG |
1 | /* liblxcapi |
2 | * | |
3 | * Copyright © 2012 Serge Hallyn <serge.hallyn@ubuntu.com>. | |
4 | * Copyright © 2012 Canonical Ltd. | |
5 | * | |
d75462e4 SH |
6 | * This library is free software; you can redistribute it and/or |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | ||
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
72d0e1cb SG |
19 | */ |
20 | ||
9be53773 | 21 | #define _GNU_SOURCE |
148a9d27 | 22 | #include <assert.h> |
a0e93eeb | 23 | #include <stdarg.h> |
71454076 | 24 | #include <pthread.h> |
9be53773 SH |
25 | #include <unistd.h> |
26 | #include <sys/types.h> | |
27 | #include <sys/wait.h> | |
4de2791f | 28 | #include <sys/mount.h> |
9be53773 | 29 | #include <errno.h> |
93dc5327 | 30 | #include <fcntl.h> |
9be53773 | 31 | #include <sched.h> |
f5dd1d53 | 32 | #include <dirent.h> |
f2363e38 ÇO |
33 | #include <sched.h> |
34 | #include <arpa/inet.h> | |
35 | #include <libgen.h> | |
d659597e | 36 | #include <stdint.h> |
c476bdce | 37 | #include <grp.h> |
5f7eba0b | 38 | #include <sys/syscall.h> |
f2363e38 ÇO |
39 | |
40 | #include <lxc/lxccontainer.h> | |
41 | #include <lxc/version.h> | |
e58fae8f | 42 | #include <lxc/network.h> |
f2363e38 | 43 | |
9be53773 | 44 | #include "config.h" |
72d0e1cb SG |
45 | #include "lxc.h" |
46 | #include "state.h" | |
72d0e1cb | 47 | #include "conf.h" |
72d0e1cb | 48 | #include "confile.h" |
b5159817 | 49 | #include "console.h" |
72d0e1cb SG |
50 | #include "cgroup.h" |
51 | #include "commands.h" | |
52 | #include "log.h" | |
9be53773 | 53 | #include "bdev.h" |
6a44839f | 54 | #include "utils.h" |
a0e93eeb | 55 | #include "attach.h" |
f2363e38 ÇO |
56 | #include "monitor.h" |
57 | #include "namespace.h" | |
fed29fad | 58 | #include "network.h" |
95ee490b | 59 | #include "lxclock.h" |
735f2c6e | 60 | #include "sync.h" |
4ba0d9af SG |
61 | |
62 | #if HAVE_IFADDRS_H | |
9c83a661 | 63 | #include <ifaddrs.h> |
4ba0d9af SG |
64 | #else |
65 | #include <../include/ifaddrs.h> | |
66 | #endif | |
72d0e1cb | 67 | |
a9a0ed90 ÇO |
68 | #define MAX_BUFFER 4096 |
69 | ||
c868b261 ÇO |
70 | #define NOT_SUPPORTED_ERROR "the requested function %s is not currently supported with unprivileged containers" |
71 | ||
5f7eba0b SG |
72 | /* Define faccessat() if missing from the C library */ |
73 | #ifndef HAVE_FACCESSAT | |
74 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
75 | { | |
76 | #ifdef __NR_faccessat | |
77 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); | |
78 | #else | |
79 | errno = ENOSYS; | |
80 | return -1; | |
81 | #endif | |
82 | } | |
83 | #endif | |
84 | ||
85 | ||
72d0e1cb SG |
86 | lxc_log_define(lxc_container, lxc); |
87 | ||
a41f104b SH |
88 | static bool config_file_exists(const char *lxcpath, const char *cname) |
89 | { | |
90 | /* $lxcpath + '/' + $cname + '/config' + \0 */ | |
91 | int ret, len = strlen(lxcpath) + strlen(cname) + 9; | |
92 | char *fname = alloca(len); | |
93 | ||
94 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); | |
95 | if (ret < 0 || ret >= len) | |
96 | return false; | |
97 | ||
98 | return file_exists(fname); | |
99 | } | |
100 | ||
3e625e2d SH |
101 | /* |
102 | * A few functions to help detect when a container creation failed. | |
103 | * If a container creation was killed partway through, then trying | |
104 | * to actually start that container could harm the host. We detect | |
105 | * this by creating a 'partial' file under the container directory, | |
106 | * and keeping an advisory lock. When container creation completes, | |
107 | * we remove that file. When we load or try to start a container, if | |
108 | * we find that file, without a flock, we remove the container. | |
109 | */ | |
74a3920a | 110 | static int ongoing_create(struct lxc_container *c) |
3e625e2d SH |
111 | { |
112 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
113 | char *path = alloca(len); | |
114 | int fd, ret; | |
93dc5327 SH |
115 | struct flock lk; |
116 | ||
3e625e2d SH |
117 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
118 | if (ret < 0 || ret >= len) { | |
119 | ERROR("Error writing partial pathname"); | |
120 | return -1; | |
121 | } | |
122 | ||
123 | if (!file_exists(path)) | |
124 | return 0; | |
025ed0f3 | 125 | fd = open(path, O_RDWR); |
025ed0f3 | 126 | if (fd < 0) { |
3e625e2d SH |
127 | // give benefit of the doubt |
128 | SYSERROR("Error opening partial file"); | |
3e625e2d SH |
129 | return 0; |
130 | } | |
93dc5327 SH |
131 | lk.l_type = F_WRLCK; |
132 | lk.l_whence = SEEK_SET; | |
133 | lk.l_start = 0; | |
134 | lk.l_len = 0; | |
135 | lk.l_pid = -1; | |
136 | if (fcntl(fd, F_GETLK, &lk) == 0 && lk.l_pid != -1) { | |
3e625e2d SH |
137 | // create is still ongoing |
138 | close(fd); | |
3e625e2d SH |
139 | return 1; |
140 | } | |
141 | // create completed but partial is still there. | |
142 | close(fd); | |
3e625e2d SH |
143 | return 2; |
144 | } | |
145 | ||
74a3920a | 146 | static int create_partial(struct lxc_container *c) |
3e625e2d SH |
147 | { |
148 | // $lxcpath + '/' + $name + '/partial' + \0 | |
149 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
150 | char *path = alloca(len); | |
151 | int fd, ret; | |
93dc5327 SH |
152 | struct flock lk; |
153 | ||
3e625e2d SH |
154 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
155 | if (ret < 0 || ret >= len) { | |
156 | ERROR("Error writing partial pathname"); | |
157 | return -1; | |
158 | } | |
93dc5327 | 159 | if ((fd=open(path, O_RDWR | O_CREAT | O_EXCL, 0755)) < 0) { |
3e625e2d | 160 | SYSERROR("Erorr creating partial file"); |
3e625e2d SH |
161 | return -1; |
162 | } | |
93dc5327 SH |
163 | lk.l_type = F_WRLCK; |
164 | lk.l_whence = SEEK_SET; | |
165 | lk.l_start = 0; | |
166 | lk.l_len = 0; | |
167 | if (fcntl(fd, F_SETLKW, &lk) < 0) { | |
3e625e2d SH |
168 | SYSERROR("Error locking partial file %s", path); |
169 | close(fd); | |
3e625e2d SH |
170 | return -1; |
171 | } | |
3e625e2d SH |
172 | |
173 | return fd; | |
174 | } | |
175 | ||
74a3920a | 176 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d SH |
177 | { |
178 | // $lxcpath + '/' + $name + '/partial' + \0 | |
179 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
180 | char *path = alloca(len); | |
181 | int ret; | |
182 | ||
183 | close(fd); | |
184 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); | |
185 | if (ret < 0 || ret >= len) { | |
186 | ERROR("Error writing partial pathname"); | |
187 | return; | |
188 | } | |
3e625e2d SH |
189 | if (unlink(path) < 0) |
190 | SYSERROR("Error unlink partial file %s", path); | |
3e625e2d SH |
191 | } |
192 | ||
72d0e1cb | 193 | /* LOCKING |
3bc449ed SH |
194 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
195 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
196 | * container configuration file. | |
197 | * The container_disk_lock also takes the container_mem_lock. | |
198 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
199 | * NOTHING mutexes two independent programs with their own struct |
200 | * lxc_container for the same c->name, between API calls. For instance, | |
201 | * c->config_read(); c->start(); Between those calls, data on disk | |
202 | * could change (which shouldn't bother the caller unless for instance | |
203 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
204 | * Two such updaters could race. The callers should therefore check their | |
205 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
206 | * due to hung callers. So I prefer to keep the locks only within our own | |
207 | * functions, not across functions. | |
208 | * | |
3bc449ed | 209 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
210 | * c->numthreads (under privlock) before forking. When deleting, |
211 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
212 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
213 | */ | |
214 | ||
215 | static void lxc_container_free(struct lxc_container *c) | |
216 | { | |
217 | if (!c) | |
218 | return; | |
219 | ||
f10fad2f ME |
220 | free(c->configfile); |
221 | c->configfile = NULL; | |
222 | free(c->error_string); | |
223 | c->error_string = NULL; | |
d95db067 | 224 | if (c->slock) { |
df271a59 | 225 | lxc_putlock(c->slock); |
d95db067 DE |
226 | c->slock = NULL; |
227 | } | |
72d0e1cb | 228 | if (c->privlock) { |
df271a59 | 229 | lxc_putlock(c->privlock); |
72d0e1cb SG |
230 | c->privlock = NULL; |
231 | } | |
f10fad2f ME |
232 | free(c->name); |
233 | c->name = NULL; | |
d95db067 DE |
234 | if (c->lxc_conf) { |
235 | lxc_conf_free(c->lxc_conf); | |
236 | c->lxc_conf = NULL; | |
237 | } | |
f10fad2f ME |
238 | free(c->config_path); |
239 | c->config_path = NULL; | |
72cf75fa | 240 | |
72d0e1cb SG |
241 | free(c); |
242 | } | |
243 | ||
43d1aa34 SH |
244 | /* |
245 | * Consider the following case: | |
246 | freer | racing get()er | |
247 | ================================================================== | |
248 | lxc_container_put() | lxc_container_get() | |
249 | \ lxclock(c->privlock) | c->numthreads < 1? (no) | |
250 | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | |
251 | \ lxcunlock() | \ | |
252 | \ lxc_container_free() | \ lxclock() returns | |
253 | | \ c->numthreads < 1 -> return 0 | |
254 | \ \ (free stuff) | | |
255 | \ \ sem_destroy(privlock) | | |
256 | ||
257 | * When the get()er checks numthreads the first time, one of the following | |
258 | * is true: | |
259 | * 1. freer has set numthreads = 0. get() returns 0 | |
260 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
261 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
262 | * numthreads is 0 and exit without touching lxclock again.. | |
263 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
264 | * will see --numthreads = 1 and not call lxc_container_free(). | |
265 | */ | |
266 | ||
72d0e1cb SG |
267 | int lxc_container_get(struct lxc_container *c) |
268 | { | |
269 | if (!c) | |
270 | return 0; | |
271 | ||
43d1aa34 SH |
272 | // if someone else has already started freeing the container, don't |
273 | // try to take the lock, which may be invalid | |
274 | if (c->numthreads < 1) | |
275 | return 0; | |
276 | ||
5cee8c50 | 277 | if (container_mem_lock(c)) |
72d0e1cb SG |
278 | return 0; |
279 | if (c->numthreads < 1) { | |
280 | // bail without trying to unlock, bc the privlock is now probably | |
281 | // in freed memory | |
282 | return 0; | |
283 | } | |
284 | c->numthreads++; | |
5cee8c50 | 285 | container_mem_unlock(c); |
72d0e1cb SG |
286 | return 1; |
287 | } | |
288 | ||
289 | int lxc_container_put(struct lxc_container *c) | |
290 | { | |
291 | if (!c) | |
292 | return -1; | |
5cee8c50 | 293 | if (container_mem_lock(c)) |
72d0e1cb SG |
294 | return -1; |
295 | if (--c->numthreads < 1) { | |
5cee8c50 | 296 | container_mem_unlock(c); |
72d0e1cb SG |
297 | lxc_container_free(c); |
298 | return 1; | |
299 | } | |
5cee8c50 | 300 | container_mem_unlock(c); |
72d0e1cb SG |
301 | return 0; |
302 | } | |
303 | ||
72d0e1cb SG |
304 | static bool lxcapi_is_defined(struct lxc_container *c) |
305 | { | |
306 | struct stat statbuf; | |
307 | bool ret = false; | |
308 | int statret; | |
309 | ||
310 | if (!c) | |
311 | return false; | |
312 | ||
5cee8c50 | 313 | if (container_mem_lock(c)) |
72d0e1cb SG |
314 | return false; |
315 | if (!c->configfile) | |
316 | goto out; | |
317 | statret = stat(c->configfile, &statbuf); | |
318 | if (statret != 0) | |
319 | goto out; | |
320 | ret = true; | |
321 | ||
322 | out: | |
5cee8c50 | 323 | container_mem_unlock(c); |
72d0e1cb SG |
324 | return ret; |
325 | } | |
326 | ||
327 | static const char *lxcapi_state(struct lxc_container *c) | |
328 | { | |
72d0e1cb SG |
329 | lxc_state_t s; |
330 | ||
331 | if (!c) | |
332 | return NULL; | |
13f5be62 | 333 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 334 | return lxc_state2str(s); |
72d0e1cb SG |
335 | } |
336 | ||
39dc698c | 337 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
338 | { |
339 | lxc_state_t s; | |
13f5be62 | 340 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
341 | return (s == STOPPED); |
342 | } | |
343 | ||
72d0e1cb SG |
344 | static bool lxcapi_is_running(struct lxc_container *c) |
345 | { | |
346 | const char *s; | |
347 | ||
348 | if (!c) | |
349 | return false; | |
350 | s = lxcapi_state(c); | |
351 | if (!s || strcmp(s, "STOPPED") == 0) | |
352 | return false; | |
353 | return true; | |
354 | } | |
355 | ||
356 | static bool lxcapi_freeze(struct lxc_container *c) | |
357 | { | |
358 | int ret; | |
359 | if (!c) | |
360 | return false; | |
361 | ||
9123e471 | 362 | ret = lxc_freeze(c->name, c->config_path); |
72d0e1cb SG |
363 | if (ret) |
364 | return false; | |
365 | return true; | |
366 | } | |
367 | ||
368 | static bool lxcapi_unfreeze(struct lxc_container *c) | |
369 | { | |
370 | int ret; | |
371 | if (!c) | |
372 | return false; | |
373 | ||
9123e471 | 374 | ret = lxc_unfreeze(c->name, c->config_path); |
72d0e1cb SG |
375 | if (ret) |
376 | return false; | |
377 | return true; | |
378 | } | |
379 | ||
b5159817 | 380 | static int lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) |
0115f8fd DE |
381 | { |
382 | int ttyfd; | |
383 | if (!c) | |
384 | return -1; | |
385 | ||
b5159817 | 386 | ttyfd = lxc_console_getfd(c, ttynum, masterfd); |
0115f8fd DE |
387 | return ttyfd; |
388 | } | |
389 | ||
b5159817 DE |
390 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
391 | int stdoutfd, int stderrfd, int escape) | |
392 | { | |
393 | return lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
394 | } | |
395 | ||
72d0e1cb SG |
396 | static pid_t lxcapi_init_pid(struct lxc_container *c) |
397 | { | |
72d0e1cb SG |
398 | if (!c) |
399 | return -1; | |
400 | ||
5cee8c50 | 401 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
402 | } |
403 | ||
12a50cc6 | 404 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
405 | { |
406 | if (!c->lxc_conf) | |
407 | c->lxc_conf = lxc_conf_init(); | |
6b0d5538 SH |
408 | if (!c->lxc_conf) |
409 | return false; | |
d08779d4 SH |
410 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
411 | return false; | |
d08779d4 | 412 | return true; |
8eb5694b SH |
413 | } |
414 | ||
12a50cc6 | 415 | static bool lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 416 | { |
39dc698c SH |
417 | bool ret = false, need_disklock = false; |
418 | int lret; | |
12a50cc6 | 419 | const char *fname; |
72d0e1cb SG |
420 | if (!c) |
421 | return false; | |
422 | ||
423 | fname = c->configfile; | |
424 | if (alt_file) | |
425 | fname = alt_file; | |
426 | if (!fname) | |
427 | return false; | |
39dc698c SH |
428 | /* |
429 | * If we're reading something other than the container's config, | |
430 | * we only need to lock the in-memory container. If loading the | |
431 | * container's config file, take the disk lock. | |
432 | */ | |
433 | if (strcmp(fname, c->configfile) == 0) | |
434 | need_disklock = true; | |
435 | ||
436 | if (need_disklock) | |
437 | lret = container_disk_lock(c); | |
438 | else | |
439 | lret = container_mem_lock(c); | |
440 | if (lret) | |
72d0e1cb | 441 | return false; |
39dc698c | 442 | |
8eb5694b | 443 | ret = load_config_locked(c, fname); |
39dc698c SH |
444 | |
445 | if (need_disklock) | |
446 | container_disk_unlock(c); | |
447 | else | |
448 | container_mem_unlock(c); | |
72d0e1cb SG |
449 | return ret; |
450 | } | |
451 | ||
540f932a | 452 | static bool lxcapi_want_daemonize(struct lxc_container *c, bool state) |
72d0e1cb | 453 | { |
497a2995 | 454 | if (!c || !c->lxc_conf) |
540f932a | 455 | return false; |
f02abefe | 456 | if (container_mem_lock(c)) { |
3bc449ed | 457 | ERROR("Error getting mem lock"); |
540f932a | 458 | return false; |
3bc449ed | 459 | } |
a2739df5 | 460 | c->daemonize = state; |
3bc449ed | 461 | container_mem_unlock(c); |
540f932a | 462 | return true; |
72d0e1cb SG |
463 | } |
464 | ||
540f932a | 465 | static bool lxcapi_want_close_all_fds(struct lxc_container *c, bool state) |
130a1888 ÇO |
466 | { |
467 | if (!c || !c->lxc_conf) | |
49badbbe | 468 | return false; |
130a1888 ÇO |
469 | if (container_mem_lock(c)) { |
470 | ERROR("Error getting mem lock"); | |
49badbbe | 471 | return false; |
130a1888 | 472 | } |
540f932a | 473 | c->lxc_conf->close_all_fds = state; |
130a1888 | 474 | container_mem_unlock(c); |
49badbbe | 475 | return true; |
130a1888 ÇO |
476 | } |
477 | ||
12a50cc6 | 478 | static bool lxcapi_wait(struct lxc_container *c, const char *state, int timeout) |
7a44c8b4 SG |
479 | { |
480 | int ret; | |
481 | ||
482 | if (!c) | |
483 | return false; | |
484 | ||
67e571de | 485 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
486 | return ret == 0; |
487 | } | |
488 | ||
489 | ||
03f064ff | 490 | static bool wait_on_daemonized_start(struct lxc_container *c, int pid) |
7a44c8b4 SG |
491 | { |
492 | /* we'll probably want to make this timeout configurable? */ | |
697fa639 | 493 | int timeout = 5, ret, status; |
7a44c8b4 | 494 | |
697fa639 SH |
495 | /* |
496 | * our child is going to fork again, then exit. reap the | |
497 | * child | |
498 | */ | |
03f064ff | 499 | ret = waitpid(pid, &status, 0); |
697fa639 SH |
500 | if (ret == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) |
501 | DEBUG("failed waiting for first dual-fork child"); | |
7a44c8b4 SG |
502 | return lxcapi_wait(c, "RUNNING", timeout); |
503 | } | |
504 | ||
2d834aa8 SH |
505 | static bool am_single_threaded(void) |
506 | { | |
507 | struct dirent dirent, *direntp; | |
508 | DIR *dir; | |
509 | int count=0; | |
510 | ||
2d834aa8 | 511 | dir = opendir("/proc/self/task"); |
2d834aa8 SH |
512 | if (!dir) { |
513 | INFO("failed to open /proc/self/task"); | |
514 | return false; | |
515 | } | |
516 | ||
517 | while (!readdir_r(dir, &dirent, &direntp)) { | |
518 | if (!direntp) | |
519 | break; | |
520 | ||
521 | if (!strcmp(direntp->d_name, ".")) | |
522 | continue; | |
523 | ||
524 | if (!strcmp(direntp->d_name, "..")) | |
525 | continue; | |
526 | if (++count > 1) | |
527 | break; | |
528 | } | |
2d834aa8 | 529 | closedir(dir); |
2d834aa8 SH |
530 | return count == 1; |
531 | } | |
532 | ||
72d0e1cb SG |
533 | /* |
534 | * I can't decide if it'd be more convenient for callers if we accept '...', | |
535 | * or a null-terminated array (i.e. execl vs execv) | |
536 | */ | |
12a50cc6 | 537 | static bool lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
538 | { |
539 | int ret; | |
540 | struct lxc_conf *conf; | |
540f932a | 541 | bool daemonize = false; |
6eaac303 | 542 | FILE *pid_fp = NULL; |
72d0e1cb SG |
543 | char *default_args[] = { |
544 | "/sbin/init", | |
13aad0ae | 545 | NULL, |
72d0e1cb | 546 | }; |
67c660d0 | 547 | char *init_cmd[2]; |
72d0e1cb SG |
548 | |
549 | /* container exists */ | |
550 | if (!c) | |
551 | return false; | |
552 | /* container has been setup */ | |
553 | if (!c->lxc_conf) | |
554 | return false; | |
555 | ||
3e625e2d SH |
556 | if ((ret = ongoing_create(c)) < 0) { |
557 | ERROR("Error checking for incomplete creation"); | |
558 | return false; | |
559 | } | |
560 | if (ret == 2) { | |
561 | ERROR("Error: %s creation was not completed", c->name); | |
562 | c->destroy(c); | |
563 | return false; | |
564 | } else if (ret == 1) { | |
565 | ERROR("Error: creation of %s is ongoing", c->name); | |
566 | return false; | |
567 | } | |
568 | ||
72d0e1cb SG |
569 | /* is this app meant to be run through lxcinit, as in lxc-execute? */ |
570 | if (useinit && !argv) | |
571 | return false; | |
572 | ||
5cee8c50 | 573 | if (container_mem_lock(c)) |
72d0e1cb SG |
574 | return false; |
575 | conf = c->lxc_conf; | |
576 | daemonize = c->daemonize; | |
5cee8c50 | 577 | container_mem_unlock(c); |
72d0e1cb SG |
578 | |
579 | if (useinit) { | |
13f5be62 | 580 | ret = lxc_execute(c->name, argv, 1, conf, c->config_path); |
72d0e1cb SG |
581 | return ret == 0 ? true : false; |
582 | } | |
583 | ||
67c660d0 SG |
584 | if (!argv) { |
585 | if (conf->init_cmd) { | |
586 | init_cmd[0] = conf->init_cmd; | |
587 | init_cmd[1] = NULL; | |
588 | argv = init_cmd; | |
589 | } | |
590 | else | |
591 | argv = default_args; | |
592 | } | |
72d0e1cb SG |
593 | |
594 | /* | |
595 | * say, I'm not sure - what locks do we want here? Any? | |
596 | * Is liblxc's locking enough here to protect the on disk | |
597 | * container? We don't want to exclude things like lxc_info | |
598 | * while container is running... | |
599 | */ | |
600 | if (daemonize) { | |
e51d4895 | 601 | lxc_monitord_spawn(c->config_path); |
71454076 | 602 | |
72d0e1cb | 603 | pid_t pid = fork(); |
844f7a38 | 604 | if (pid < 0) |
72d0e1cb | 605 | return false; |
6eaac303 QH |
606 | |
607 | if (pid != 0) { | |
608 | /* Set to NULL because we don't want father unlink | |
609 | * the PID file, child will do the free and unlink. | |
610 | */ | |
611 | c->pidfile = NULL; | |
03f064ff | 612 | return wait_on_daemonized_start(c, pid); |
6eaac303 | 613 | } |
025ed0f3 | 614 | |
697fa639 SH |
615 | /* second fork to be reparented by init */ |
616 | pid = fork(); | |
617 | if (pid < 0) { | |
618 | SYSERROR("Error doing dual-fork"); | |
619 | return false; | |
620 | } | |
621 | if (pid != 0) | |
622 | exit(0); | |
72d0e1cb | 623 | /* like daemon(), chdir to / and redirect 0,1,2 to /dev/null */ |
c278cef2 SH |
624 | if (chdir("/")) { |
625 | SYSERROR("Error chdir()ing to /."); | |
626 | return false; | |
627 | } | |
d2cf4c37 | 628 | lxc_check_inherited(conf, true, -1); |
72d0e1cb SG |
629 | close(0); |
630 | close(1); | |
631 | close(2); | |
eddaaafd | 632 | open("/dev/zero", O_RDONLY); |
72d0e1cb SG |
633 | open("/dev/null", O_RDWR); |
634 | open("/dev/null", O_RDWR); | |
635 | setsid(); | |
2d834aa8 SH |
636 | } else { |
637 | if (!am_single_threaded()) { | |
638 | ERROR("Cannot start non-daemonized container when threaded"); | |
639 | return false; | |
640 | } | |
72d0e1cb SG |
641 | } |
642 | ||
6eaac303 QH |
643 | /* We need to write PID file after daeminize, so we always |
644 | * write the right PID. | |
645 | */ | |
646 | if (c->pidfile) { | |
647 | pid_fp = fopen(c->pidfile, "w"); | |
648 | if (pid_fp == NULL) { | |
649 | SYSERROR("Failed to create pidfile '%s' for '%s'", | |
650 | c->pidfile, c->name); | |
651 | return false; | |
652 | } | |
653 | ||
654 | if (fprintf(pid_fp, "%d\n", getpid()) < 0) { | |
655 | SYSERROR("Failed to write '%s'", c->pidfile); | |
656 | fclose(pid_fp); | |
657 | pid_fp = NULL; | |
658 | return false; | |
659 | } | |
660 | ||
661 | fclose(pid_fp); | |
662 | pid_fp = NULL; | |
663 | } | |
664 | ||
72d0e1cb SG |
665 | reboot: |
666 | conf->reboot = 0; | |
d2cf4c37 SH |
667 | |
668 | if (lxc_check_inherited(conf, daemonize, -1)) { | |
669 | ERROR("Inherited fds found"); | |
670 | ret = 1; | |
671 | goto out; | |
672 | } | |
673 | ||
13f5be62 | 674 | ret = lxc_start(c->name, argv, conf, c->config_path); |
d4ef230c | 675 | c->error_num = ret; |
72d0e1cb SG |
676 | |
677 | if (conf->reboot) { | |
678 | INFO("container requested reboot"); | |
679 | conf->reboot = 0; | |
72d0e1cb SG |
680 | goto reboot; |
681 | } | |
682 | ||
d2cf4c37 | 683 | out: |
487d8008 QH |
684 | if (c->pidfile) { |
685 | unlink(c->pidfile); | |
686 | free(c->pidfile); | |
687 | c->pidfile = NULL; | |
688 | } | |
689 | ||
844f7a38 | 690 | if (daemonize) |
05e5d7dc | 691 | exit (ret == 0 ? true : false); |
844f7a38 | 692 | else |
05e5d7dc | 693 | return (ret == 0 ? true : false); |
72d0e1cb SG |
694 | } |
695 | ||
696 | /* | |
697 | * note there MUST be an ending NULL | |
698 | */ | |
699 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) | |
700 | { | |
701 | va_list ap; | |
a0e93eeb | 702 | char **inargs = NULL; |
72d0e1cb SG |
703 | bool bret = false; |
704 | ||
705 | /* container exists */ | |
706 | if (!c) | |
707 | return false; | |
708 | ||
72d0e1cb | 709 | va_start(ap, useinit); |
a0e93eeb | 710 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb SG |
711 | va_end(ap); |
712 | ||
a0e93eeb CS |
713 | if (!inargs) { |
714 | ERROR("Memory allocation error."); | |
715 | goto out; | |
72d0e1cb SG |
716 | } |
717 | ||
a0e93eeb CS |
718 | /* pass NULL if no arguments were supplied */ |
719 | bret = lxcapi_start(c, useinit, *inargs ? inargs : NULL); | |
72d0e1cb SG |
720 | |
721 | out: | |
722 | if (inargs) { | |
4e03ae57 DE |
723 | char **arg; |
724 | for (arg = inargs; *arg; arg++) | |
725 | free(*arg); | |
72d0e1cb SG |
726 | free(inargs); |
727 | } | |
728 | ||
729 | return bret; | |
730 | } | |
731 | ||
732 | static bool lxcapi_stop(struct lxc_container *c) | |
733 | { | |
734 | int ret; | |
735 | ||
736 | if (!c) | |
737 | return false; | |
738 | ||
ef6e34ee | 739 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb SG |
740 | |
741 | return ret == 0; | |
72d0e1cb SG |
742 | } |
743 | ||
d5752559 SH |
744 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
745 | { | |
746 | int ret = -1, lasterr; | |
747 | char *p = alloca(strlen(path)+1); | |
748 | mode_t mask = umask(0002); | |
749 | ret = mkdir(path, 0770); | |
750 | lasterr = errno; | |
751 | umask(mask); | |
752 | errno = lasterr; | |
753 | if (ret) { | |
754 | if (errno == EEXIST) | |
755 | ret = 0; | |
756 | else { | |
757 | SYSERROR("failed to create container path %s", path); | |
758 | return -1; | |
759 | } | |
760 | } | |
761 | strcpy(p, path); | |
762 | if (!lxc_list_empty(&conf->id_map) && chown_mapped_root(p, conf) != 0) { | |
763 | ERROR("Failed to chown container dir"); | |
764 | ret = -1; | |
765 | } | |
766 | return ret; | |
767 | } | |
768 | ||
72d0e1cb SG |
769 | /* |
770 | * create the standard expected container dir | |
771 | */ | |
772 | static bool create_container_dir(struct lxc_container *c) | |
773 | { | |
774 | char *s; | |
775 | int len, ret; | |
776 | ||
2a59a681 | 777 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
778 | s = malloc(len); |
779 | if (!s) | |
780 | return false; | |
2a59a681 | 781 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
72d0e1cb SG |
782 | if (ret < 0 || ret >= len) { |
783 | free(s); | |
784 | return false; | |
785 | } | |
d5752559 | 786 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb SG |
787 | free(s); |
788 | return ret == 0; | |
789 | } | |
790 | ||
1897e3bc SH |
791 | static const char *lxcapi_get_config_path(struct lxc_container *c); |
792 | static bool lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
793 | ||
72d0e1cb | 794 | /* |
1897e3bc SH |
795 | * do_bdev_create: thin wrapper around bdev_create(). Like bdev_create(), |
796 | * it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 797 | */ |
1897e3bc SH |
798 | static struct bdev *do_bdev_create(struct lxc_container *c, const char *type, |
799 | struct bdev_specs *specs) | |
800 | { | |
801 | char *dest; | |
1897e3bc SH |
802 | size_t len; |
803 | struct bdev *bdev; | |
804 | int ret; | |
805 | ||
cd219ae6 SY |
806 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
807 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) == 0) { | |
cf465fe4 SH |
808 | const char *rpath = c->lxc_conf->rootfs.path; |
809 | len = strlen(rpath) + 1; | |
cd219ae6 | 810 | dest = alloca(len); |
cf465fe4 | 811 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 812 | } else { |
cf465fe4 | 813 | const char *lxcpath = lxcapi_get_config_path(c); |
cd219ae6 SY |
814 | len = strlen(c->name) + strlen(lxcpath) + 9; |
815 | dest = alloca(len); | |
816 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); | |
817 | } | |
1897e3bc SH |
818 | if (ret < 0 || ret >= len) |
819 | return NULL; | |
820 | ||
821 | bdev = bdev_create(dest, type, c->name, specs); | |
d44e88c2 | 822 | if (!bdev) { |
959aee9c | 823 | ERROR("Failed to create backing store type %s", type); |
1897e3bc | 824 | return NULL; |
d44e88c2 SH |
825 | } |
826 | ||
1897e3bc | 827 | lxcapi_set_config_item(c, "lxc.rootfs", bdev->src); |
cf3ef16d SH |
828 | |
829 | /* if we are not root, chown the rootfs dir to root in the | |
830 | * target uidmap */ | |
831 | ||
0e6e3a41 | 832 | if (geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { |
c4d10a05 | 833 | if (chown_mapped_root(bdev->dest, c->lxc_conf) < 0) { |
959aee9c | 834 | ERROR("Error chowning %s to container root", bdev->dest); |
97e9cfa0 | 835 | suggest_default_idmap(); |
cf3ef16d SH |
836 | bdev_put(bdev); |
837 | return NULL; | |
838 | } | |
839 | } | |
840 | ||
1897e3bc SH |
841 | return bdev; |
842 | } | |
843 | ||
cbee8106 SH |
844 | /* |
845 | * Given the '-t' template option to lxc-create, figure out what to | |
846 | * do. If the template is a full executable path, use that. If it | |
85db5535 DE |
847 | * is something like 'sshd', then return $templatepath/lxc-sshd. |
848 | * On success return the template, on error return NULL. | |
cbee8106 | 849 | */ |
85db5535 | 850 | static char *get_template_path(const char *t) |
cbee8106 SH |
851 | { |
852 | int ret, len; | |
853 | char *tpath; | |
854 | ||
cbee8106 SH |
855 | if (t[0] == '/' && access(t, X_OK) == 0) { |
856 | tpath = strdup(t); | |
cbee8106 SH |
857 | return tpath; |
858 | } | |
859 | ||
860 | len = strlen(LXCTEMPLATEDIR) + strlen(t) + strlen("/lxc-") + 1; | |
861 | tpath = malloc(len); | |
862 | if (!tpath) | |
85db5535 | 863 | return NULL; |
cbee8106 SH |
864 | ret = snprintf(tpath, len, "%s/lxc-%s", LXCTEMPLATEDIR, t); |
865 | if (ret < 0 || ret >= len) { | |
866 | free(tpath); | |
85db5535 | 867 | return NULL; |
cbee8106 SH |
868 | } |
869 | if (access(tpath, X_OK) < 0) { | |
959aee9c | 870 | SYSERROR("bad template: %s", t); |
cbee8106 | 871 | free(tpath); |
85db5535 | 872 | return NULL; |
cbee8106 SH |
873 | } |
874 | ||
875 | return tpath; | |
876 | } | |
877 | ||
96b3cb40 | 878 | static char *lxcbasename(char *path) |
72d0e1cb | 879 | { |
96b3cb40 SH |
880 | char *p = path + strlen(path) - 1; |
881 | while (*p != '/' && p > path) | |
882 | p--; | |
883 | return p; | |
884 | } | |
72d0e1cb | 885 | |
dc23c1c8 | 886 | static bool create_run_template(struct lxc_container *c, char *tpath, bool quiet, |
96b3cb40 SH |
887 | char *const argv[]) |
888 | { | |
889 | pid_t pid; | |
72d0e1cb | 890 | |
72d0e1cb | 891 | if (!tpath) |
96b3cb40 | 892 | return true; |
72d0e1cb SG |
893 | |
894 | pid = fork(); | |
895 | if (pid < 0) { | |
959aee9c | 896 | SYSERROR("failed to fork task for container creation template"); |
96b3cb40 | 897 | return false; |
72d0e1cb SG |
898 | } |
899 | ||
900 | if (pid == 0) { // child | |
1897e3bc SH |
901 | char *patharg, *namearg, *rootfsarg, *src; |
902 | struct bdev *bdev = NULL; | |
72d0e1cb | 903 | int i; |
96b3cb40 SH |
904 | int ret, len, nargs = 0; |
905 | char **newargv; | |
cf3ef16d | 906 | struct lxc_conf *conf = c->lxc_conf; |
72d0e1cb | 907 | |
dc23c1c8 SH |
908 | if (quiet) { |
909 | close(0); | |
910 | close(1); | |
911 | close(2); | |
912 | open("/dev/zero", O_RDONLY); | |
913 | open("/dev/null", O_RDWR); | |
914 | open("/dev/null", O_RDWR); | |
915 | } | |
1897e3bc SH |
916 | |
917 | src = c->lxc_conf->rootfs.path; | |
918 | /* | |
1f92162d | 919 | * for an overlay create, what the user wants is the template to fill |
1897e3bc SH |
920 | * in what will become the readonly lower layer. So don't mount for |
921 | * the template | |
922 | */ | |
1f92162d SG |
923 | if (strncmp(src, "overlayfs:", 10) == 0) |
924 | src = overlay_getlower(src+10); | |
925 | if (strncmp(src, "aufs:", 5) == 0) | |
926 | src = overlay_getlower(src+5); | |
927 | ||
76a26f55 | 928 | bdev = bdev_init(c->lxc_conf, src, c->lxc_conf->rootfs.mount, NULL); |
1897e3bc SH |
929 | if (!bdev) { |
930 | ERROR("Error opening rootfs"); | |
931 | exit(1); | |
932 | } | |
933 | ||
4de2791f | 934 | if (geteuid() == 0) { |
cf3ef16d SH |
935 | if (unshare(CLONE_NEWNS) < 0) { |
936 | ERROR("error unsharing mounts"); | |
937 | exit(1); | |
938 | } | |
4de2791f | 939 | if (detect_shared_rootfs()) { |
c597baa8 | 940 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { |
4de2791f SH |
941 | SYSERROR("Failed to make / rslave to run template"); |
942 | ERROR("Continuing..."); | |
943 | } | |
944 | } | |
945 | } | |
2659c7cb | 946 | if (strcmp(bdev->type, "dir") && strcmp(bdev->type, "btrfs")) { |
4de2791f | 947 | if (geteuid() != 0) { |
2659c7cb | 948 | ERROR("non-root users can only create btrfs and directory-backed containers"); |
4de2791f SH |
949 | exit(1); |
950 | } | |
cf3ef16d SH |
951 | if (bdev->ops->mount(bdev) < 0) { |
952 | ERROR("Error mounting rootfs"); | |
953 | exit(1); | |
954 | } | |
955 | } else { // TODO come up with a better way here! | |
f10fad2f | 956 | free(bdev->dest); |
cf3ef16d | 957 | bdev->dest = strdup(bdev->src); |
1897e3bc SH |
958 | } |
959 | ||
72d0e1cb SG |
960 | /* |
961 | * create our new array, pre-pend the template name and | |
962 | * base args | |
963 | */ | |
964 | if (argv) | |
1897e3bc | 965 | for (nargs = 0; argv[nargs]; nargs++) ; |
6849cb5b | 966 | nargs += 4; // template, path, rootfs and name args |
cf3ef16d | 967 | |
72d0e1cb SG |
968 | newargv = malloc(nargs * sizeof(*newargv)); |
969 | if (!newargv) | |
970 | exit(1); | |
96b3cb40 | 971 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 972 | |
2a59a681 | 973 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
974 | patharg = malloc(len); |
975 | if (!patharg) | |
976 | exit(1); | |
2a59a681 | 977 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb SG |
978 | if (ret < 0 || ret >= len) |
979 | exit(1); | |
980 | newargv[1] = patharg; | |
981 | len = strlen("--name=") + strlen(c->name) + 1; | |
982 | namearg = malloc(len); | |
983 | if (!namearg) | |
984 | exit(1); | |
985 | ret = snprintf(namearg, len, "--name=%s", c->name); | |
986 | if (ret < 0 || ret >= len) | |
987 | exit(1); | |
988 | newargv[2] = namearg; | |
989 | ||
1897e3bc SH |
990 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
991 | rootfsarg = malloc(len); | |
992 | if (!rootfsarg) | |
993 | exit(1); | |
994 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); | |
995 | if (ret < 0 || ret >= len) | |
996 | exit(1); | |
997 | newargv[3] = rootfsarg; | |
998 | ||
72d0e1cb SG |
999 | /* add passed-in args */ |
1000 | if (argv) | |
1897e3bc SH |
1001 | for (i = 4; i < nargs; i++) |
1002 | newargv[i] = argv[i-4]; | |
72d0e1cb SG |
1003 | |
1004 | /* add trailing NULL */ | |
1005 | nargs++; | |
1006 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1007 | if (!newargv) | |
1008 | exit(1); | |
1009 | newargv[nargs - 1] = NULL; | |
1010 | ||
cf3ef16d SH |
1011 | /* |
1012 | * If we're running the template in a mapped userns, then | |
1013 | * we prepend the template command with: | |
1014 | * lxc-usernsexec <-m map1> ... <-m mapn> -- | |
57d116ab SH |
1015 | * and we append "--mapped-uid x", where x is the mapped uid |
1016 | * for our geteuid() | |
cf3ef16d | 1017 | */ |
0e6e3a41 | 1018 | if (!lxc_list_empty(&conf->id_map)) { |
cf3ef16d | 1019 | int n2args = 1; |
57d116ab | 1020 | char txtuid[20]; |
2133f58c | 1021 | char txtgid[20]; |
cf3ef16d SH |
1022 | char **n2 = malloc(n2args * sizeof(*n2)); |
1023 | struct lxc_list *it; | |
1024 | struct id_map *map; | |
1025 | ||
57d116ab SH |
1026 | if (!n2) { |
1027 | SYSERROR("out of memory"); | |
1028 | exit(1); | |
1029 | } | |
cf3ef16d SH |
1030 | newargv[0] = tpath; |
1031 | tpath = "lxc-usernsexec"; | |
1032 | n2[0] = "lxc-usernsexec"; | |
1033 | lxc_list_for_each(it, &conf->id_map) { | |
1034 | map = it->elem; | |
1035 | n2args += 2; | |
57d116ab | 1036 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d SH |
1037 | if (!n2) |
1038 | exit(1); | |
1039 | n2[n2args-2] = "-m"; | |
1040 | n2[n2args-1] = malloc(200); | |
1041 | if (!n2[n2args-1]) | |
1042 | exit(1); | |
1043 | ret = snprintf(n2[n2args-1], 200, "%c:%lu:%lu:%lu", | |
1044 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1045 | map->nsid, map->hostid, map->range); | |
1046 | if (ret < 0 || ret >= 200) | |
1047 | exit(1); | |
1048 | } | |
2133f58c | 1049 | int hostid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); |
6849cb5b | 1050 | int extraargs = hostid_mapped >= 0 ? 1 : 3; |
57d116ab | 1051 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d SH |
1052 | if (!n2) |
1053 | exit(1); | |
57d116ab | 1054 | if (hostid_mapped < 0) { |
2133f58c | 1055 | hostid_mapped = find_unmapped_nsuid(conf, ID_TYPE_UID); |
cf3ef16d | 1056 | n2[n2args++] = "-m"; |
57d116ab | 1057 | if (hostid_mapped < 0) { |
cf3ef16d SH |
1058 | ERROR("Could not find free uid to map"); |
1059 | exit(1); | |
1060 | } | |
1061 | n2[n2args++] = malloc(200); | |
1062 | if (!n2[n2args-1]) { | |
1063 | SYSERROR("out of memory"); | |
1064 | exit(1); | |
1065 | } | |
1066 | ret = snprintf(n2[n2args-1], 200, "u:%d:%d:1", | |
57d116ab | 1067 | hostid_mapped, geteuid()); |
cf3ef16d SH |
1068 | if (ret < 0 || ret >= 200) { |
1069 | ERROR("string too long"); | |
1070 | exit(1); | |
1071 | } | |
1072 | } | |
2133f58c SH |
1073 | int hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); |
1074 | extraargs = hostgid_mapped >= 0 ? 1 : 3; | |
1075 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); | |
1076 | if (!n2) | |
1077 | exit(1); | |
1078 | if (hostgid_mapped < 0) { | |
1079 | hostgid_mapped = find_unmapped_nsuid(conf, ID_TYPE_GID); | |
1080 | n2[n2args++] = "-m"; | |
1081 | if (hostgid_mapped < 0) { | |
1082 | ERROR("Could not find free uid to map"); | |
1083 | exit(1); | |
1084 | } | |
1085 | n2[n2args++] = malloc(200); | |
1086 | if (!n2[n2args-1]) { | |
1087 | SYSERROR("out of memory"); | |
1088 | exit(1); | |
1089 | } | |
1090 | ret = snprintf(n2[n2args-1], 200, "g:%d:%d:1", | |
1091 | hostgid_mapped, getegid()); | |
1092 | if (ret < 0 || ret >= 200) { | |
1093 | ERROR("string too long"); | |
1094 | exit(1); | |
1095 | } | |
1096 | } | |
cf3ef16d SH |
1097 | n2[n2args++] = "--"; |
1098 | for (i = 0; i < nargs; i++) | |
1099 | n2[i + n2args] = newargv[i]; | |
57d116ab SH |
1100 | n2args += nargs; |
1101 | // Finally add "--mapped-uid $uid" to tell template what to chown | |
1102 | // cached images to | |
2133f58c | 1103 | n2args += 4; |
57d116ab SH |
1104 | n2 = realloc(n2, n2args * sizeof(char *)); |
1105 | if (!n2) { | |
1106 | SYSERROR("out of memory"); | |
1107 | exit(1); | |
1108 | } | |
1109 | // note n2[n2args-1] is NULL | |
2133f58c | 1110 | n2[n2args-5] = "--mapped-uid"; |
57d116ab | 1111 | snprintf(txtuid, 20, "%d", hostid_mapped); |
2133f58c SH |
1112 | n2[n2args-4] = txtuid; |
1113 | n2[n2args-3] = "--mapped-gid"; | |
1114 | snprintf(txtgid, 20, "%d", hostgid_mapped); | |
1115 | n2[n2args-2] = txtgid; | |
57d116ab | 1116 | n2[n2args-1] = NULL; |
cf3ef16d SH |
1117 | free(newargv); |
1118 | newargv = n2; | |
1119 | } | |
72d0e1cb | 1120 | /* execute */ |
cf3ef16d | 1121 | execvp(tpath, newargv); |
72d0e1cb SG |
1122 | SYSERROR("failed to execute template %s", tpath); |
1123 | exit(1); | |
1124 | } | |
1125 | ||
9be53773 | 1126 | if (wait_for_pid(pid) != 0) { |
959aee9c | 1127 | ERROR("container creation template for %s failed", c->name); |
96b3cb40 SH |
1128 | return false; |
1129 | } | |
1130 | ||
1131 | return true; | |
1132 | } | |
1133 | ||
74a3920a | 1134 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1135 | { |
1fd9bd50 | 1136 | long flen; |
b4569e93 | 1137 | char *contents; |
3ce74686 | 1138 | FILE *f; |
025ed0f3 | 1139 | int ret = -1; |
52026772 | 1140 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1141 | int i; |
3ce74686 | 1142 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1143 | char *tpath; |
52026772 | 1144 | #endif |
3ce74686 | 1145 | |
025ed0f3 | 1146 | f = fopen(path, "r"); |
025ed0f3 | 1147 | if (f == NULL) |
3ce74686 | 1148 | return false; |
025ed0f3 SH |
1149 | |
1150 | if (fseek(f, 0, SEEK_END) < 0) | |
1151 | goto out_error; | |
1152 | if ((flen = ftell(f)) < 0) | |
1153 | goto out_error; | |
1154 | if (fseek(f, 0, SEEK_SET) < 0) | |
1155 | goto out_error; | |
1156 | if ((contents = malloc(flen + 1)) == NULL) | |
1157 | goto out_error; | |
1158 | if (fread(contents, 1, flen, f) != flen) | |
1159 | goto out_free_contents; | |
1160 | ||
3ce74686 | 1161 | contents[flen] = '\0'; |
025ed0f3 | 1162 | ret = fclose(f); |
025ed0f3 SH |
1163 | f = NULL; |
1164 | if (ret < 0) | |
1165 | goto out_free_contents; | |
3ce74686 | 1166 | |
b4569e93 | 1167 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1168 | tpath = get_template_path(t); |
85db5535 | 1169 | if (!tpath) { |
959aee9c | 1170 | ERROR("bad template: %s", t); |
025ed0f3 | 1171 | goto out_free_contents; |
3ce74686 SH |
1172 | } |
1173 | ||
85db5535 DE |
1174 | ret = sha1sum_file(tpath, md_value); |
1175 | if (ret < 0) { | |
1176 | ERROR("Error getting sha1sum of %s", tpath); | |
3ce74686 | 1177 | free(tpath); |
85db5535 | 1178 | goto out_free_contents; |
3ce74686 | 1179 | } |
85db5535 | 1180 | free(tpath); |
3ce74686 SH |
1181 | #endif |
1182 | ||
025ed0f3 | 1183 | f = fopen(path, "w"); |
025ed0f3 | 1184 | if (f == NULL) { |
3ce74686 SH |
1185 | SYSERROR("reopening config for writing"); |
1186 | free(contents); | |
1187 | return false; | |
1188 | } | |
1189 | fprintf(f, "# Template used to create this container: %s\n", t); | |
1190 | if (argv) { | |
1191 | fprintf(f, "# Parameters passed to the template:"); | |
1192 | while (*argv) { | |
1193 | fprintf(f, " %s", *argv); | |
1194 | argv++; | |
1195 | } | |
1196 | fprintf(f, "\n"); | |
1197 | } | |
1198 | #if HAVE_LIBGNUTLS | |
56698177 SH |
1199 | fprintf(f, "# Template script checksum (SHA-1): "); |
1200 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1201 | fprintf(f, "%02x", md_value[i]); | |
1202 | fprintf(f, "\n"); | |
3ce74686 | 1203 | #endif |
0520c252 | 1204 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
3ce74686 SH |
1205 | if (fwrite(contents, 1, flen, f) != flen) { |
1206 | SYSERROR("Writing original contents"); | |
1207 | free(contents); | |
1208 | fclose(f); | |
1209 | return false; | |
1210 | } | |
025ed0f3 SH |
1211 | ret = 0; |
1212 | out_free_contents: | |
3ce74686 | 1213 | free(contents); |
025ed0f3 SH |
1214 | out_error: |
1215 | if (f) { | |
1216 | int newret; | |
025ed0f3 | 1217 | newret = fclose(f); |
025ed0f3 SH |
1218 | if (ret == 0) |
1219 | ret = newret; | |
1220 | } | |
1221 | if (ret < 0) { | |
1222 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1223 | return false; |
1224 | } | |
1225 | return true; | |
1226 | } | |
1227 | ||
4df7f012 SH |
1228 | static void lxcapi_clear_config(struct lxc_container *c) |
1229 | { | |
f979ac15 SH |
1230 | if (c) { |
1231 | if (c->lxc_conf) { | |
1232 | lxc_conf_free(c->lxc_conf); | |
1233 | c->lxc_conf = NULL; | |
1234 | } | |
4df7f012 SH |
1235 | } |
1236 | } | |
1237 | ||
96b3cb40 | 1238 | static bool lxcapi_destroy(struct lxc_container *c); |
18aa217b SH |
1239 | static bool container_destroy(struct lxc_container *c); |
1240 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); | |
96b3cb40 SH |
1241 | /* |
1242 | * lxcapi_create: | |
1243 | * create a container with the given parameters. | |
1244 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1245 | * configuration already set | |
1246 | * @t: the template to execute to instantiate the root filesystem and | |
1247 | * adjust the configuration. | |
1248 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1249 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1250 | * use. | |
1251 | * | |
1252 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1253 | * arguments, you can just pass NULL. | |
1254 | */ | |
1255 | static bool lxcapi_create(struct lxc_container *c, const char *t, | |
dc23c1c8 | 1256 | const char *bdevtype, struct bdev_specs *specs, int flags, |
96b3cb40 SH |
1257 | char *const argv[]) |
1258 | { | |
a69aad27 | 1259 | bool ret = false; |
96b3cb40 | 1260 | pid_t pid; |
85db5535 | 1261 | char *tpath = NULL; |
cbee8106 | 1262 | int partial_fd; |
96b3cb40 SH |
1263 | |
1264 | if (!c) | |
1265 | return false; | |
1266 | ||
85db5535 DE |
1267 | if (t) { |
1268 | tpath = get_template_path(t); | |
1269 | if (!tpath) { | |
959aee9c | 1270 | ERROR("bad template: %s", t); |
85db5535 DE |
1271 | goto out; |
1272 | } | |
96b3cb40 SH |
1273 | } |
1274 | ||
cf465fe4 SH |
1275 | /* |
1276 | * If a template is passed in, and the rootfs already is defined in | |
1277 | * the container config and exists, then * caller is trying to create | |
1278 | * an existing container. Return an error, but do NOT delete the | |
1279 | * container. | |
1280 | */ | |
1281 | if (lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && | |
1282 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { | |
1283 | ERROR("Container %s:%s already exists", c->config_path, c->name); | |
6c6892b5 | 1284 | goto free_tpath; |
cf465fe4 SH |
1285 | } |
1286 | ||
6c6892b5 | 1287 | if (!c->lxc_conf) { |
dad87e3b | 1288 | if (!c->load_config(c, lxc_global_config_value("lxc.default_config"))) { |
959aee9c | 1289 | ERROR("Error loading default configuration file %s", lxc_global_config_value("lxc.default_config")); |
6c6892b5 DE |
1290 | goto free_tpath; |
1291 | } | |
96b3cb40 SH |
1292 | } |
1293 | ||
6c6892b5 DE |
1294 | if (!create_container_dir(c)) |
1295 | goto free_tpath; | |
1296 | ||
0590e82c SH |
1297 | /* |
1298 | * either template or rootfs.path should be set. | |
1299 | * if both template and rootfs.path are set, template is setup as rootfs.path. | |
1300 | * container is already created if we have a config and rootfs.path is accessible | |
1301 | */ | |
1302 | if (!c->lxc_conf->rootfs.path && !tpath) | |
1303 | /* no template passed in and rootfs does not exist: error */ | |
1304 | goto out; | |
1305 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) | |
1306 | /* rootfs passed into configuration, but does not exist: error */ | |
1307 | goto out; | |
1308 | if (lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { | |
1309 | /* Rootfs already existed, user just wanted to save the | |
1310 | * loaded configuration */ | |
1311 | ret = true; | |
1312 | goto out; | |
a69aad27 | 1313 | } |
96b3cb40 SH |
1314 | |
1315 | /* Mark that this container is being created */ | |
1316 | if ((partial_fd = create_partial(c)) < 0) | |
1317 | goto out; | |
1318 | ||
1319 | /* no need to get disk lock bc we have the partial locked */ | |
1320 | ||
1321 | /* | |
1322 | * Create the backing store | |
1323 | * Note we can't do this in the same task as we use to execute the | |
1324 | * template because of the way zfs works. | |
1325 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1326 | * namespace. | |
1327 | */ | |
1328 | pid = fork(); | |
1329 | if (pid < 0) { | |
959aee9c | 1330 | SYSERROR("failed to fork task for container creation template"); |
8eb5694b SH |
1331 | goto out_unlock; |
1332 | } | |
1333 | ||
96b3cb40 SH |
1334 | if (pid == 0) { // child |
1335 | struct bdev *bdev = NULL; | |
1336 | ||
1337 | if (!(bdev = do_bdev_create(c, bdevtype, specs))) { | |
1338 | ERROR("Error creating backing store type %s for %s", | |
1339 | bdevtype ? bdevtype : "(none)", c->name); | |
1340 | exit(1); | |
1341 | } | |
1342 | ||
1343 | /* save config file again to store the new rootfs location */ | |
1344 | if (!c->save_config(c, NULL)) { | |
959aee9c | 1345 | ERROR("failed to save starting configuration for %s", c->name); |
96b3cb40 SH |
1346 | // parent task won't see bdev in config so we delete it |
1347 | bdev->ops->umount(bdev); | |
1348 | bdev->ops->destroy(bdev); | |
1349 | exit(1); | |
1350 | } | |
1351 | exit(0); | |
1352 | } | |
1353 | if (wait_for_pid(pid) != 0) | |
a09295f8 | 1354 | goto out_unlock; |
96b3cb40 SH |
1355 | |
1356 | /* reload config to get the rootfs */ | |
a3b47c09 | 1357 | lxc_conf_free(c->lxc_conf); |
96b3cb40 SH |
1358 | c->lxc_conf = NULL; |
1359 | if (!load_config_locked(c, c->configfile)) | |
a09295f8 | 1360 | goto out_unlock; |
96b3cb40 | 1361 | |
dc23c1c8 | 1362 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1363 | goto out_unlock; |
1364 | ||
8eb5694b SH |
1365 | // now clear out the lxc_conf we have, reload from the created |
1366 | // container | |
4df7f012 | 1367 | lxcapi_clear_config(c); |
3ce74686 | 1368 | |
9d65a487 KY |
1369 | if (t) { |
1370 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
1371 | ERROR("Error prepending header to configuration file"); | |
1372 | goto out_unlock; | |
1373 | } | |
3ce74686 | 1374 | } |
a69aad27 | 1375 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1376 | |
1377 | out_unlock: | |
3e625e2d SH |
1378 | if (partial_fd >= 0) |
1379 | remove_partial(c, partial_fd); | |
72d0e1cb | 1380 | out: |
c55d4505 | 1381 | if (!ret) |
18aa217b | 1382 | container_destroy(c); |
6c6892b5 | 1383 | free_tpath: |
f10fad2f | 1384 | free(tpath); |
a69aad27 | 1385 | return ret; |
72d0e1cb SG |
1386 | } |
1387 | ||
3e625e2d SH |
1388 | static bool lxcapi_reboot(struct lxc_container *c) |
1389 | { | |
1390 | pid_t pid; | |
1391 | ||
1392 | if (!c) | |
1393 | return false; | |
1394 | if (!c->is_running(c)) | |
1395 | return false; | |
1396 | pid = c->init_pid(c); | |
1397 | if (pid <= 0) | |
1398 | return false; | |
1399 | if (kill(pid, SIGINT) < 0) | |
1400 | return false; | |
1401 | return true; | |
1402 | ||
1403 | } | |
1404 | ||
72d0e1cb SG |
1405 | static bool lxcapi_shutdown(struct lxc_container *c, int timeout) |
1406 | { | |
1407 | bool retv; | |
1408 | pid_t pid; | |
f0f1d8c0 | 1409 | int haltsignal = SIGPWR; |
72d0e1cb SG |
1410 | |
1411 | if (!c) | |
1412 | return false; | |
1413 | ||
72d0e1cb SG |
1414 | if (!c->is_running(c)) |
1415 | return true; | |
1416 | pid = c->init_pid(c); | |
1417 | if (pid <= 0) | |
1418 | return true; | |
b0227444 | 1419 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 DE |
1420 | haltsignal = c->lxc_conf->haltsignal; |
1421 | kill(pid, haltsignal); | |
72d0e1cb | 1422 | retv = c->wait(c, "STOPPED", timeout); |
72d0e1cb SG |
1423 | return retv; |
1424 | } | |
1425 | ||
1897e3bc | 1426 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 1427 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
1428 | { |
1429 | bool bret = false; | |
a0e93eeb | 1430 | char **args = NULL; |
72d0e1cb | 1431 | va_list ap; |
72d0e1cb SG |
1432 | |
1433 | if (!c) | |
1434 | return false; | |
1435 | ||
1436 | /* | |
1437 | * since we're going to wait for create to finish, I don't think we | |
1438 | * need to get a copy of the arguments. | |
1439 | */ | |
dc23c1c8 | 1440 | va_start(ap, flags); |
a0e93eeb | 1441 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 1442 | va_end(ap); |
a0e93eeb CS |
1443 | if (!args) { |
1444 | ERROR("Memory allocation error."); | |
1445 | goto out; | |
1446 | } | |
72d0e1cb | 1447 | |
dc23c1c8 | 1448 | bret = c->create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
1449 | |
1450 | out: | |
a0e93eeb | 1451 | free(args); |
72d0e1cb SG |
1452 | return bret; |
1453 | } | |
1454 | ||
6b0d5538 SH |
1455 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
1456 | { | |
1457 | if (strcmp(key, "lxc.cgroup") == 0) | |
1458 | clear_unexp_config_line(conf, key, true); | |
1459 | else if (strcmp(key, "lxc.network") == 0) | |
1460 | clear_unexp_config_line(conf, key, true); | |
1461 | else if (strcmp(key, "lxc.hook") == 0) | |
1462 | clear_unexp_config_line(conf, key, true); | |
1463 | else | |
1464 | clear_unexp_config_line(conf, key, false); | |
1465 | if (!do_append_unexp_config_line(conf, key, "")) | |
1466 | WARN("Error clearing configuration for %s", key); | |
1467 | } | |
1468 | ||
12a50cc6 | 1469 | static bool lxcapi_clear_config_item(struct lxc_container *c, const char *key) |
72d0e1cb SG |
1470 | { |
1471 | int ret; | |
1472 | ||
1473 | if (!c || !c->lxc_conf) | |
1474 | return false; | |
5cee8c50 | 1475 | if (container_mem_lock(c)) |
72d0e1cb | 1476 | return false; |
72d0e1cb | 1477 | ret = lxc_clear_config_item(c->lxc_conf, key); |
6b0d5538 SH |
1478 | if (!ret) |
1479 | do_clear_unexp_config_line(c->lxc_conf, key); | |
5cee8c50 | 1480 | container_mem_unlock(c); |
72d0e1cb SG |
1481 | return ret == 0; |
1482 | } | |
1483 | ||
e0f59189 | 1484 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c DY |
1485 | { |
1486 | pid_t pid = c->init_pid(c); | |
ae22a220 | 1487 | |
0e6e3a41 | 1488 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && access("/proc/self/ns/user", F_OK) == 0) { |
51d0854c DY |
1489 | if (!switch_to_ns(pid, "user")) |
1490 | return false; | |
9c83a661 | 1491 | } |
51d0854c | 1492 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
1493 | } |
1494 | ||
9c88ff1f ÇO |
1495 | // used by qsort and bsearch functions for comparing names |
1496 | static inline int string_cmp(char **first, char **second) | |
1497 | { | |
1498 | return strcmp(*first, *second); | |
1499 | } | |
1500 | ||
1501 | // used by qsort and bsearch functions for comparing container names | |
1502 | static inline int container_cmp(struct lxc_container **first, struct lxc_container **second) | |
1503 | { | |
1504 | return strcmp((*first)->name, (*second)->name); | |
1505 | } | |
1506 | ||
1507 | static bool add_to_array(char ***names, char *cname, int pos) | |
1508 | { | |
1509 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
1510 | if (!newnames) { | |
1511 | ERROR("Out of memory"); | |
1512 | return false; | |
1513 | } | |
1514 | ||
1515 | *names = newnames; | |
1516 | newnames[pos] = strdup(cname); | |
1517 | if (!newnames[pos]) | |
1518 | return false; | |
1519 | ||
1520 | // sort the arrray as we will use binary search on it | |
1521 | qsort(newnames, pos + 1, sizeof(char *), (int (*)(const void *,const void *))string_cmp); | |
1522 | ||
1523 | return true; | |
1524 | } | |
1525 | ||
2871830a | 1526 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, int pos, bool sort) |
9c88ff1f ÇO |
1527 | { |
1528 | struct lxc_container **newlist = realloc(*list, (pos+1) * sizeof(struct lxc_container *)); | |
1529 | if (!newlist) { | |
1530 | ERROR("Out of memory"); | |
1531 | return false; | |
1532 | } | |
1533 | ||
1534 | *list = newlist; | |
1535 | newlist[pos] = c; | |
1536 | ||
1537 | // sort the arrray as we will use binary search on it | |
2871830a DE |
1538 | if (sort) |
1539 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), (int (*)(const void *,const void *))container_cmp); | |
9c88ff1f ÇO |
1540 | |
1541 | return true; | |
1542 | } | |
1543 | ||
1544 | static char** get_from_array(char ***names, char *cname, int size) | |
1545 | { | |
1546 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
1547 | } | |
1548 | ||
1549 | ||
1550 | static bool array_contains(char ***names, char *cname, int size) { | |
1551 | if(get_from_array(names, cname, size) != NULL) | |
1552 | return true; | |
1553 | return false; | |
1554 | } | |
1555 | ||
1556 | static bool remove_from_array(char ***names, char *cname, int size) | |
1557 | { | |
1558 | char **result = get_from_array(names, cname, size); | |
1559 | if (result != NULL) { | |
1560 | free(result); | |
1561 | return true; | |
1562 | } | |
1563 | return false; | |
1564 | } | |
1565 | ||
799f29ab ÇO |
1566 | static char** lxcapi_get_interfaces(struct lxc_container *c) |
1567 | { | |
ae22a220 ÇO |
1568 | pid_t pid; |
1569 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 1570 | char **interfaces = NULL; |
ae22a220 | 1571 | char interface[IFNAMSIZ]; |
799f29ab | 1572 | |
ae22a220 ÇO |
1573 | if(pipe(pipefd) < 0) { |
1574 | SYSERROR("pipe failed"); | |
1575 | return NULL; | |
c868b261 ÇO |
1576 | } |
1577 | ||
ae22a220 ÇO |
1578 | pid = fork(); |
1579 | if (pid < 0) { | |
959aee9c | 1580 | SYSERROR("failed to fork task to get interfaces information"); |
ae22a220 ÇO |
1581 | close(pipefd[0]); |
1582 | close(pipefd[1]); | |
1583 | return NULL; | |
1584 | } | |
799f29ab | 1585 | |
ae22a220 ÇO |
1586 | if (pid == 0) { // child |
1587 | int ret = 1, nbytes; | |
1588 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
1589 | ||
1590 | /* close the read-end of the pipe */ | |
1591 | close(pipefd[0]); | |
1592 | ||
e0f59189 | 1593 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
1594 | SYSERROR("failed to enter namespace"); |
1595 | goto out; | |
1596 | } | |
1597 | ||
1598 | /* Grab the list of interfaces */ | |
1599 | if (getifaddrs(&interfaceArray)) { | |
1600 | SYSERROR("failed to get interfaces list"); | |
1601 | goto out; | |
1602 | } | |
1603 | ||
1604 | /* Iterate through the interfaces */ | |
1605 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
1606 | nbytes = write(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); | |
1607 | if (nbytes < 0) { | |
1608 | ERROR("write failed"); | |
1609 | goto out; | |
1610 | } | |
1611 | count++; | |
1612 | } | |
1613 | ret = 0; | |
1614 | ||
1615 | out: | |
1616 | if (interfaceArray) | |
1617 | freeifaddrs(interfaceArray); | |
1618 | ||
1619 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
1620 | close(pipefd[1]); | |
1621 | exit(ret); | |
799f29ab ÇO |
1622 | } |
1623 | ||
ae22a220 ÇO |
1624 | /* close the write-end of the pipe */ |
1625 | close(pipefd[1]); | |
1626 | ||
358afd84 | 1627 | while (read(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
ae22a220 ÇO |
1628 | if (array_contains(&interfaces, interface, count)) |
1629 | continue; | |
799f29ab | 1630 | |
ae22a220 ÇO |
1631 | if(!add_to_array(&interfaces, interface, count)) |
1632 | ERROR("PARENT: add_to_array failed"); | |
9c88ff1f ÇO |
1633 | count++; |
1634 | } | |
799f29ab | 1635 | |
ae22a220 ÇO |
1636 | if (wait_for_pid(pid) != 0) { |
1637 | for(i=0;i<count;i++) | |
1638 | free(interfaces[i]); | |
1639 | free(interfaces); | |
1640 | interfaces = NULL; | |
1641 | } | |
9c88ff1f | 1642 | |
ae22a220 ÇO |
1643 | /* close the read-end of the pipe */ |
1644 | close(pipefd[0]); | |
799f29ab | 1645 | |
9c88ff1f ÇO |
1646 | /* Append NULL to the array */ |
1647 | if(interfaces) | |
1648 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); | |
799f29ab | 1649 | |
9c88ff1f | 1650 | return interfaces; |
799f29ab ÇO |
1651 | } |
1652 | ||
f0ca2726 | 1653 | static char** lxcapi_get_ips(struct lxc_container *c, const char* interface, const char* family, int scope) |
799f29ab | 1654 | { |
ae22a220 ÇO |
1655 | pid_t pid; |
1656 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 1657 | char **addresses = NULL; |
ae22a220 | 1658 | char address[INET6_ADDRSTRLEN]; |
799f29ab | 1659 | |
ae22a220 ÇO |
1660 | if(pipe(pipefd) < 0) { |
1661 | SYSERROR("pipe failed"); | |
1662 | return NULL; | |
c868b261 ÇO |
1663 | } |
1664 | ||
ae22a220 ÇO |
1665 | pid = fork(); |
1666 | if (pid < 0) { | |
959aee9c | 1667 | SYSERROR("failed to fork task to get container ips"); |
ae22a220 ÇO |
1668 | close(pipefd[0]); |
1669 | close(pipefd[1]); | |
1670 | return NULL; | |
9c83a661 SG |
1671 | } |
1672 | ||
ae22a220 ÇO |
1673 | if (pid == 0) { // child |
1674 | int ret = 1, nbytes; | |
1675 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
1676 | char addressOutputBuffer[INET6_ADDRSTRLEN]; | |
1677 | void *tempAddrPtr = NULL; | |
1678 | char *address = NULL; | |
fe218ca3 | 1679 | |
ae22a220 ÇO |
1680 | /* close the read-end of the pipe */ |
1681 | close(pipefd[0]); | |
1682 | ||
e0f59189 | 1683 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
1684 | SYSERROR("failed to enter namespace"); |
1685 | goto out; | |
9c83a661 | 1686 | } |
ae22a220 ÇO |
1687 | |
1688 | /* Grab the list of interfaces */ | |
1689 | if (getifaddrs(&interfaceArray)) { | |
1690 | SYSERROR("failed to get interfaces list"); | |
1691 | goto out; | |
1692 | } | |
1693 | ||
1694 | /* Iterate through the interfaces */ | |
1695 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
1696 | if (tempIfAddr->ifa_addr == NULL) | |
9c83a661 SG |
1697 | continue; |
1698 | ||
ae22a220 ÇO |
1699 | if(tempIfAddr->ifa_addr->sa_family == AF_INET) { |
1700 | if (family && strcmp(family, "inet")) | |
1701 | continue; | |
1702 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; | |
1703 | } | |
1704 | else { | |
1705 | if (family && strcmp(family, "inet6")) | |
1706 | continue; | |
1707 | ||
1708 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
1709 | continue; | |
1710 | ||
1711 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
1712 | } | |
1713 | ||
1714 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) | |
1715 | continue; | |
1716 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
1717 | continue; |
1718 | ||
ae22a220 ÇO |
1719 | address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
1720 | tempAddrPtr, | |
1721 | addressOutputBuffer, | |
1722 | sizeof(addressOutputBuffer)); | |
1723 | if (!address) | |
1724 | continue; | |
1725 | ||
1726 | nbytes = write(pipefd[1], address, INET6_ADDRSTRLEN); | |
1727 | if (nbytes < 0) { | |
1728 | ERROR("write failed"); | |
1729 | goto out; | |
1730 | } | |
1731 | count++; | |
9c83a661 | 1732 | } |
ae22a220 | 1733 | ret = 0; |
9c83a661 | 1734 | |
ae22a220 ÇO |
1735 | out: |
1736 | if(interfaceArray) | |
1737 | freeifaddrs(interfaceArray); | |
9c83a661 | 1738 | |
ae22a220 ÇO |
1739 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
1740 | close(pipefd[1]); | |
1741 | exit(ret); | |
6849cb5b | 1742 | } |
9c83a661 | 1743 | |
ae22a220 ÇO |
1744 | /* close the write-end of the pipe */ |
1745 | close(pipefd[1]); | |
1746 | ||
358afd84 | 1747 | while (read(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
9c88ff1f | 1748 | if(!add_to_array(&addresses, address, count)) |
ae22a220 | 1749 | ERROR("PARENT: add_to_array failed"); |
9c88ff1f | 1750 | count++; |
9c83a661 SG |
1751 | } |
1752 | ||
ae22a220 ÇO |
1753 | if (wait_for_pid(pid) != 0) { |
1754 | for(i=0;i<count;i++) | |
1755 | free(addresses[i]); | |
1756 | free(addresses); | |
1757 | addresses = NULL; | |
1758 | } | |
9c83a661 | 1759 | |
ae22a220 ÇO |
1760 | /* close the read-end of the pipe */ |
1761 | close(pipefd[0]); | |
9c83a661 SG |
1762 | |
1763 | /* Append NULL to the array */ | |
9c88ff1f ÇO |
1764 | if(addresses) |
1765 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); | |
9c83a661 SG |
1766 | |
1767 | return addresses; | |
1768 | } | |
1769 | ||
12a50cc6 | 1770 | static int lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) |
72d0e1cb SG |
1771 | { |
1772 | int ret; | |
1773 | ||
1774 | if (!c || !c->lxc_conf) | |
1775 | return -1; | |
5cee8c50 | 1776 | if (container_mem_lock(c)) |
72d0e1cb | 1777 | return -1; |
72d0e1cb | 1778 | ret = lxc_get_config_item(c->lxc_conf, key, retv, inlen); |
5cee8c50 | 1779 | container_mem_unlock(c); |
72d0e1cb SG |
1780 | return ret; |
1781 | } | |
1782 | ||
8ac18377 ÇO |
1783 | static char* lxcapi_get_running_config_item(struct lxc_container *c, const char *key) |
1784 | { | |
1785 | char *ret; | |
1786 | ||
1787 | if (!c || !c->lxc_conf) | |
1788 | return NULL; | |
1789 | if (container_mem_lock(c)) | |
1790 | return NULL; | |
1791 | ret = lxc_cmd_get_config_item(c->name, key, c->get_config_path(c)); | |
1792 | container_mem_unlock(c); | |
1793 | return ret; | |
1794 | } | |
1795 | ||
12a50cc6 | 1796 | static int lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) |
72d0e1cb SG |
1797 | { |
1798 | if (!key) | |
1799 | return lxc_listconfigs(retv, inlen); | |
1800 | /* | |
1801 | * Support 'lxc.network.<idx>', i.e. 'lxc.network.0' | |
1802 | * This is an intelligent result to show which keys are valid given | |
1803 | * the type of nic it is | |
1804 | */ | |
1805 | if (!c || !c->lxc_conf) | |
1806 | return -1; | |
5cee8c50 | 1807 | if (container_mem_lock(c)) |
72d0e1cb SG |
1808 | return -1; |
1809 | int ret = -1; | |
1810 | if (strncmp(key, "lxc.network.", 12) == 0) | |
6849cb5b | 1811 | ret = lxc_list_nicconfigs(c->lxc_conf, key, retv, inlen); |
5cee8c50 | 1812 | container_mem_unlock(c); |
72d0e1cb SG |
1813 | return ret; |
1814 | } | |
1815 | ||
12a50cc6 | 1816 | static bool lxcapi_save_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 1817 | { |
39dc698c SH |
1818 | FILE *fout; |
1819 | bool ret = false, need_disklock = false; | |
1820 | int lret; | |
1821 | ||
72d0e1cb SG |
1822 | if (!alt_file) |
1823 | alt_file = c->configfile; | |
1824 | if (!alt_file) | |
6849cb5b | 1825 | return false; // should we write to stdout if no file is specified? |
39dc698c SH |
1826 | |
1827 | // If we haven't yet loaded a config, load the stock config | |
1828 | if (!c->lxc_conf) { | |
dad87e3b | 1829 | if (!c->load_config(c, lxc_global_config_value("lxc.default_config"))) { |
959aee9c | 1830 | ERROR("Error loading default configuration file %s while saving %s", lxc_global_config_value("lxc.default_config"), c->name); |
72d0e1cb SG |
1831 | return false; |
1832 | } | |
39dc698c | 1833 | } |
72d0e1cb | 1834 | |
5a3d2e1e SG |
1835 | if (!create_container_dir(c)) |
1836 | return false; | |
1837 | ||
39dc698c SH |
1838 | /* |
1839 | * If we're writing to the container's config file, take the | |
1840 | * disk lock. Otherwise just take the memlock to protect the | |
1841 | * struct lxc_container while we're traversing it. | |
1842 | */ | |
1843 | if (strcmp(c->configfile, alt_file) == 0) | |
1844 | need_disklock = true; | |
1845 | ||
1846 | if (need_disklock) | |
1847 | lret = container_disk_lock(c); | |
1848 | else | |
1849 | lret = container_mem_lock(c); | |
1850 | ||
1851 | if (lret) | |
72d0e1cb | 1852 | return false; |
39dc698c SH |
1853 | |
1854 | fout = fopen(alt_file, "w"); | |
1855 | if (!fout) | |
1856 | goto out; | |
6b0d5538 | 1857 | write_config(fout, c->lxc_conf); |
72d0e1cb | 1858 | fclose(fout); |
39dc698c SH |
1859 | ret = true; |
1860 | ||
1861 | out: | |
1862 | if (need_disklock) | |
1863 | container_disk_unlock(c); | |
1864 | else | |
1865 | container_mem_unlock(c); | |
1866 | return ret; | |
72d0e1cb SG |
1867 | } |
1868 | ||
dfb31b25 SH |
1869 | static bool mod_rdep(struct lxc_container *c, bool inc) |
1870 | { | |
1871 | char path[MAXPATHLEN]; | |
1872 | int ret, v = 0; | |
1873 | FILE *f; | |
1874 | bool bret = false; | |
1875 | ||
1876 | if (container_disk_lock(c)) | |
1877 | return false; | |
1878 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
1879 | c->name); | |
1880 | if (ret < 0 || ret > MAXPATHLEN) | |
1881 | goto out; | |
1882 | f = fopen(path, "r"); | |
1883 | if (f) { | |
1884 | ret = fscanf(f, "%d", &v); | |
1885 | fclose(f); | |
1886 | if (ret != 1) { | |
1887 | ERROR("Corrupted file %s", path); | |
1888 | goto out; | |
1889 | } | |
1890 | } | |
1891 | v += inc ? 1 : -1; | |
1892 | f = fopen(path, "w"); | |
1893 | if (!f) | |
1894 | goto out; | |
1895 | if (fprintf(f, "%d\n", v) < 0) { | |
1896 | ERROR("Error writing new snapshots value"); | |
1897 | fclose(f); | |
1898 | goto out; | |
1899 | } | |
025ed0f3 | 1900 | ret = fclose(f); |
025ed0f3 | 1901 | if (ret != 0) { |
dfb31b25 SH |
1902 | SYSERROR("Error writing to or closing snapshots file"); |
1903 | goto out; | |
1904 | } | |
1905 | ||
1906 | bret = true; | |
1907 | ||
1908 | out: | |
1909 | container_disk_unlock(c); | |
1910 | return bret; | |
1911 | } | |
1912 | ||
1913 | static void strip_newline(char *p) | |
1914 | { | |
1915 | size_t len = strlen(p); | |
1916 | if (len < 1) | |
1917 | return; | |
1918 | if (p[len-1] == '\n') | |
1919 | p[len-1] = '\0'; | |
1920 | } | |
1921 | ||
1922 | static void mod_all_rdeps(struct lxc_container *c, bool inc) | |
1923 | { | |
1924 | struct lxc_container *p; | |
1925 | char *lxcpath = NULL, *lxcname = NULL, path[MAXPATHLEN]; | |
1926 | size_t pathlen = 0, namelen = 0; | |
1927 | FILE *f; | |
1928 | int ret; | |
1929 | ||
1930 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", | |
1931 | c->config_path, c->name); | |
1932 | if (ret < 0 || ret >= MAXPATHLEN) { | |
1933 | ERROR("Path name too long"); | |
1934 | return; | |
1935 | } | |
025ed0f3 | 1936 | f = fopen(path, "r"); |
025ed0f3 | 1937 | if (f == NULL) |
dfb31b25 SH |
1938 | return; |
1939 | while (getline(&lxcpath, &pathlen, f) != -1) { | |
1940 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 1941 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
1942 | goto out; |
1943 | } | |
1944 | strip_newline(lxcpath); | |
1945 | strip_newline(lxcname); | |
1946 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { | |
1947 | ERROR("Unable to find dependent container %s:%s", | |
1948 | lxcpath, lxcname); | |
1949 | continue; | |
1950 | } | |
1951 | if (!mod_rdep(p, inc)) | |
1952 | ERROR("Failed to increase numsnapshots for %s:%s", | |
1953 | lxcpath, lxcname); | |
1954 | lxc_container_put(p); | |
1955 | } | |
1956 | out: | |
f10fad2f ME |
1957 | free(lxcpath); |
1958 | free(lxcname); | |
dfb31b25 SH |
1959 | fclose(f); |
1960 | } | |
1961 | ||
18aa217b | 1962 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 SH |
1963 | { |
1964 | char path[MAXPATHLEN]; | |
1965 | int ret, v; | |
1966 | FILE *f; | |
1967 | bool bret = false; | |
1968 | ||
1969 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
1970 | c->name); | |
1971 | if (ret < 0 || ret > MAXPATHLEN) | |
1972 | goto out; | |
1973 | f = fopen(path, "r"); | |
1974 | if (!f) | |
1975 | goto out; | |
1976 | ret = fscanf(f, "%d", &v); | |
1977 | fclose(f); | |
1978 | if (ret != 1) | |
1979 | goto out; | |
1980 | bret = v != 0; | |
1981 | ||
1982 | out: | |
1983 | return bret; | |
1984 | } | |
1985 | ||
18aa217b SH |
1986 | static bool has_snapshots(struct lxc_container *c) |
1987 | { | |
1988 | char path[MAXPATHLEN]; | |
1989 | struct dirent dirent, *direntp; | |
1990 | int count=0; | |
1991 | DIR *dir; | |
1992 | ||
1993 | if (!get_snappath_dir(c, path)) | |
1994 | return false; | |
1995 | dir = opendir(path); | |
1996 | if (!dir) | |
1997 | return false; | |
1998 | while (!readdir_r(dir, &dirent, &direntp)) { | |
1999 | if (!direntp) | |
2000 | break; | |
2001 | ||
2002 | if (!strcmp(direntp->d_name, ".")) | |
2003 | continue; | |
2004 | ||
2005 | if (!strcmp(direntp->d_name, "..")) | |
2006 | continue; | |
2007 | count++; | |
2008 | break; | |
2009 | } | |
2010 | closedir(dir); | |
2011 | return count > 0; | |
2012 | } | |
2013 | ||
4355ab5f SH |
2014 | static int lxc_rmdir_onedev_wrapper(void *data) |
2015 | { | |
2016 | char *arg = (char *) data; | |
18aa217b | 2017 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2018 | } |
2019 | ||
44a706bd SH |
2020 | static int do_bdev_destroy(struct lxc_conf *conf) |
2021 | { | |
2022 | struct bdev *r; | |
2023 | int ret = 0; | |
2024 | ||
76a26f55 | 2025 | r = bdev_init(conf, conf->rootfs.path, conf->rootfs.mount, NULL); |
44a706bd SH |
2026 | if (!r) |
2027 | return -1; | |
2028 | ||
2029 | if (r->ops->destroy(r) < 0) | |
2030 | ret = -1; | |
2031 | bdev_put(r); | |
2032 | return ret; | |
2033 | } | |
2034 | ||
2035 | static int bdev_destroy_wrapper(void *data) | |
2036 | { | |
2037 | struct lxc_conf *conf = data; | |
2038 | ||
2039 | if (setgid(0) < 0) { | |
2040 | ERROR("Failed to setgid to 0"); | |
2041 | return -1; | |
2042 | } | |
2043 | if (setgroups(0, NULL) < 0) | |
2044 | WARN("Failed to clear groups"); | |
2045 | if (setuid(0) < 0) { | |
2046 | ERROR("Failed to setuid to 0"); | |
2047 | return -1; | |
2048 | } | |
2049 | return do_bdev_destroy(conf); | |
2050 | } | |
2051 | ||
18aa217b | 2052 | static bool container_destroy(struct lxc_container *c) |
72d0e1cb | 2053 | { |
c868b261 | 2054 | bool bret = false; |
fef48dc9 | 2055 | int ret; |
72d0e1cb | 2056 | |
1897e3bc | 2057 | if (!c || !lxcapi_is_defined(c)) |
5a3d2e1e SG |
2058 | return false; |
2059 | ||
3bc449ed | 2060 | if (container_disk_lock(c)) |
72d0e1cb | 2061 | return false; |
72d0e1cb | 2062 | |
39dc698c | 2063 | if (!is_stopped(c)) { |
60bf62d4 SH |
2064 | // we should queue some sort of error - in c->error_string? |
2065 | ERROR("container %s is not stopped", c->name); | |
2066 | goto out; | |
72d0e1cb SG |
2067 | } |
2068 | ||
44a706bd SH |
2069 | if (c->lxc_conf && c->lxc_conf->rootfs.path && c->lxc_conf->rootfs.mount) { |
2070 | if (am_unpriv()) | |
2071 | ret = userns_exec_1(c->lxc_conf, bdev_destroy_wrapper, c->lxc_conf); | |
2072 | else | |
2073 | ret = do_bdev_destroy(c->lxc_conf); | |
2074 | if (ret < 0) { | |
2075 | ERROR("Error destroying rootfs for %s", c->name); | |
2076 | goto out; | |
60bf62d4 SH |
2077 | } |
2078 | } | |
2079 | ||
dfb31b25 SH |
2080 | mod_all_rdeps(c, false); |
2081 | ||
60bf62d4 SH |
2082 | const char *p1 = lxcapi_get_config_path(c); |
2083 | char *path = alloca(strlen(p1) + strlen(c->name) + 2); | |
2084 | sprintf(path, "%s/%s", p1, c->name); | |
c868b261 | 2085 | if (am_unpriv()) |
4355ab5f SH |
2086 | ret = userns_exec_1(c->lxc_conf, lxc_rmdir_onedev_wrapper, path); |
2087 | else | |
18aa217b | 2088 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 2089 | if (ret < 0) { |
60bf62d4 SH |
2090 | ERROR("Error destroying container directory for %s", c->name); |
2091 | goto out; | |
2092 | } | |
fef48dc9 | 2093 | bret = true; |
60bf62d4 SH |
2094 | |
2095 | out: | |
3bc449ed | 2096 | container_disk_unlock(c); |
fef48dc9 | 2097 | return bret; |
72d0e1cb SG |
2098 | } |
2099 | ||
18aa217b SH |
2100 | static bool lxcapi_destroy(struct lxc_container *c) |
2101 | { | |
2102 | if (!c || !lxcapi_is_defined(c)) | |
2103 | return false; | |
2104 | if (has_snapshots(c)) { | |
2105 | ERROR("Container %s has snapshots; not removing", c->name); | |
2106 | return false; | |
2107 | } | |
2108 | ||
2109 | if (has_fs_snapshots(c)) { | |
2110 | ERROR("container %s has snapshots on its rootfs", c->name); | |
2111 | return false; | |
2112 | } | |
2113 | ||
2114 | return container_destroy(c); | |
2115 | } | |
2116 | ||
2117 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
2118 | ||
2119 | static bool lxcapi_destroy_with_snapshots(struct lxc_container *c) | |
2120 | { | |
2121 | if (!c || !lxcapi_is_defined(c)) | |
2122 | return false; | |
2123 | if (!lxcapi_snapshot_destroy_all(c)) { | |
2124 | ERROR("Error deleting all snapshots"); | |
2125 | return false; | |
2126 | } | |
2127 | return lxcapi_destroy(c); | |
2128 | } | |
2129 | ||
96532523 SH |
2130 | static bool set_config_item_locked(struct lxc_container *c, const char *key, const char *v) |
2131 | { | |
2132 | struct lxc_config_t *config; | |
2133 | ||
2134 | if (!c->lxc_conf) | |
2135 | c->lxc_conf = lxc_conf_init(); | |
6b0d5538 | 2136 | if (!c->lxc_conf) |
96532523 SH |
2137 | return false; |
2138 | config = lxc_getconfig(key); | |
2139 | if (!config) | |
2140 | return false; | |
6b0d5538 | 2141 | if (config->cb(key, v, c->lxc_conf) != 0) |
f979ac15 | 2142 | return false; |
6b0d5538 | 2143 | return do_append_unexp_config_line(c->lxc_conf, key, v); |
96532523 SH |
2144 | } |
2145 | ||
12a50cc6 | 2146 | static bool lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 2147 | { |
72d0e1cb | 2148 | bool b = false; |
72d0e1cb SG |
2149 | |
2150 | if (!c) | |
2151 | return false; | |
2152 | ||
5cee8c50 | 2153 | if (container_mem_lock(c)) |
72d0e1cb SG |
2154 | return false; |
2155 | ||
96532523 | 2156 | b = set_config_item_locked(c, key, v); |
72d0e1cb | 2157 | |
5cee8c50 | 2158 | container_mem_unlock(c); |
72d0e1cb SG |
2159 | return b; |
2160 | } | |
2161 | ||
2162 | static char *lxcapi_config_file_name(struct lxc_container *c) | |
2163 | { | |
2164 | if (!c || !c->configfile) | |
2165 | return NULL; | |
2166 | return strdup(c->configfile); | |
2167 | } | |
2168 | ||
2a59a681 SH |
2169 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
2170 | { | |
2171 | if (!c || !c->config_path) | |
2172 | return NULL; | |
2173 | return (const char *)(c->config_path); | |
2174 | } | |
2175 | ||
afeecbba SH |
2176 | /* |
2177 | * not for export | |
2178 | * Just recalculate the c->configfile based on the | |
2179 | * c->config_path, which must be set. | |
2180 | * The lxc_container must be locked or not yet public. | |
2181 | */ | |
2182 | static bool set_config_filename(struct lxc_container *c) | |
2183 | { | |
2184 | char *newpath; | |
2185 | int len, ret; | |
2186 | ||
2187 | if (!c->config_path) | |
2188 | return false; | |
2189 | ||
2190 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
2191 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
2192 | newpath = malloc(len); | |
2193 | if (!newpath) | |
2194 | return false; | |
2195 | ||
2196 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
2197 | if (ret < 0 || ret >= len) { | |
2198 | fprintf(stderr, "Error printing out config file name\n"); | |
2199 | free(newpath); | |
2200 | return false; | |
2201 | } | |
2202 | ||
f10fad2f | 2203 | free(c->configfile); |
afeecbba SH |
2204 | c->configfile = newpath; |
2205 | ||
2206 | return true; | |
2207 | } | |
2208 | ||
2a59a681 SH |
2209 | static bool lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2210 | { | |
2211 | char *p; | |
2212 | bool b = false; | |
afeecbba | 2213 | char *oldpath = NULL; |
2a59a681 SH |
2214 | |
2215 | if (!c) | |
2216 | return b; | |
2217 | ||
5cee8c50 | 2218 | if (container_mem_lock(c)) |
2a59a681 SH |
2219 | return b; |
2220 | ||
2221 | p = strdup(path); | |
afeecbba SH |
2222 | if (!p) { |
2223 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 2224 | goto err; |
afeecbba SH |
2225 | } |
2226 | ||
2a59a681 SH |
2227 | b = true; |
2228 | if (c->config_path) | |
afeecbba | 2229 | oldpath = c->config_path; |
2a59a681 | 2230 | c->config_path = p; |
afeecbba SH |
2231 | |
2232 | /* Since we've changed the config path, we have to change the | |
2233 | * config file name too */ | |
2234 | if (!set_config_filename(c)) { | |
2235 | ERROR("Out of memory setting new config filename"); | |
2236 | b = false; | |
2237 | free(c->config_path); | |
2238 | c->config_path = oldpath; | |
2239 | oldpath = NULL; | |
2240 | } | |
2a59a681 | 2241 | err: |
f10fad2f | 2242 | free(oldpath); |
5cee8c50 | 2243 | container_mem_unlock(c); |
2a59a681 SH |
2244 | return b; |
2245 | } | |
2246 | ||
2247 | ||
794dd120 SH |
2248 | static bool lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
2249 | { | |
2250 | int ret; | |
794dd120 SH |
2251 | |
2252 | if (!c) | |
2253 | return false; | |
2254 | ||
3bc449ed | 2255 | if (is_stopped(c)) |
794dd120 SH |
2256 | return false; |
2257 | ||
3bc449ed SH |
2258 | if (container_disk_lock(c)) |
2259 | return false; | |
794dd120 | 2260 | |
33ad9f1a | 2261 | ret = lxc_cgroup_set(subsys, value, c->name, c->config_path); |
3bc449ed SH |
2262 | |
2263 | container_disk_unlock(c); | |
2264 | return ret == 0; | |
794dd120 SH |
2265 | } |
2266 | ||
2267 | static int lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
2268 | { | |
3bc449ed | 2269 | int ret; |
794dd120 | 2270 | |
6502006a | 2271 | if (!c) |
794dd120 SH |
2272 | return -1; |
2273 | ||
3bc449ed | 2274 | if (is_stopped(c)) |
794dd120 SH |
2275 | return -1; |
2276 | ||
3bc449ed SH |
2277 | if (container_disk_lock(c)) |
2278 | return -1; | |
794dd120 | 2279 | |
33ad9f1a | 2280 | ret = lxc_cgroup_get(subsys, retv, inlen, c->name, c->config_path); |
794dd120 | 2281 | |
3bc449ed | 2282 | container_disk_unlock(c); |
794dd120 SH |
2283 | return ret; |
2284 | } | |
2285 | ||
593e8478 | 2286 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 2287 | { |
593e8478 | 2288 | return lxc_global_config_value(key); |
a8428dfa SH |
2289 | } |
2290 | ||
b6b918a1 SG |
2291 | const char *lxc_get_version(void) |
2292 | { | |
95ee490b | 2293 | return LXC_VERSION; |
b6b918a1 SG |
2294 | } |
2295 | ||
f0ca2726 | 2296 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
2297 | { |
2298 | int in, out; | |
2299 | ssize_t len, ret; | |
2300 | char buf[8096]; | |
2301 | struct stat sbuf; | |
2302 | ||
2303 | if (file_exists(new)) { | |
2304 | ERROR("copy destination %s exists", new); | |
2305 | return -1; | |
2306 | } | |
2307 | ret = stat(old, &sbuf); | |
2308 | if (ret < 0) { | |
dfb31b25 | 2309 | INFO("Error stat'ing %s", old); |
9be53773 SH |
2310 | return -1; |
2311 | } | |
2312 | ||
2313 | in = open(old, O_RDONLY); | |
2314 | if (in < 0) { | |
dfb31b25 | 2315 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
2316 | return -1; |
2317 | } | |
2318 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); | |
2319 | if (out < 0) { | |
dfb31b25 | 2320 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
2321 | close(in); |
2322 | return -1; | |
2323 | } | |
2324 | ||
2325 | while (1) { | |
2326 | len = read(in, buf, 8096); | |
2327 | if (len < 0) { | |
dfb31b25 | 2328 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
2329 | goto err; |
2330 | } | |
2331 | if (len == 0) | |
2332 | break; | |
2333 | ret = write(out, buf, len); | |
6849cb5b | 2334 | if (ret < len) { // should we retry? |
dfb31b25 | 2335 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
2336 | goto err; |
2337 | } | |
2338 | } | |
2339 | close(in); | |
2340 | close(out); | |
2341 | ||
2342 | // we set mode, but not owner/group | |
2343 | ret = chmod(new, sbuf.st_mode); | |
2344 | if (ret) { | |
dfb31b25 | 2345 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
2346 | return -1; |
2347 | } | |
2348 | ||
2349 | return 0; | |
2350 | ||
2351 | err: | |
2352 | close(in); | |
2353 | close(out); | |
2354 | return -1; | |
2355 | } | |
2356 | ||
9be53773 SH |
2357 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
2358 | { | |
619256b5 | 2359 | int i, len, ret; |
9be53773 | 2360 | struct lxc_list *it; |
619256b5 ÇO |
2361 | char *cpath; |
2362 | ||
2363 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
2364 | cpath = alloca(len); | |
2365 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); | |
2366 | if (ret < 0 || ret >= len) | |
2367 | return -1; | |
9be53773 SH |
2368 | |
2369 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
2370 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
2371 | char *hookname = it->elem; | |
c32981c3 | 2372 | char *fname = strrchr(hookname, '/'); |
9be53773 SH |
2373 | char tmppath[MAXPATHLEN]; |
2374 | if (!fname) // relative path - we don't support, but maybe we should | |
2375 | return 0; | |
619256b5 ÇO |
2376 | if (strncmp(hookname, cpath, len - 1) != 0) { |
2377 | // this hook is public - ignore | |
2378 | continue; | |
2379 | } | |
9be53773 SH |
2380 | // copy the script, and change the entry in confile |
2381 | ret = snprintf(tmppath, MAXPATHLEN, "%s/%s/%s", | |
2382 | c->config_path, c->name, fname+1); | |
2383 | if (ret < 0 || ret >= MAXPATHLEN) | |
2384 | return -1; | |
2385 | ret = copy_file(it->elem, tmppath); | |
2386 | if (ret < 0) | |
2387 | return -1; | |
2388 | free(it->elem); | |
2389 | it->elem = strdup(tmppath); | |
2390 | if (!it->elem) { | |
2391 | ERROR("out of memory copying hook path"); | |
2392 | return -1; | |
2393 | } | |
9be53773 SH |
2394 | } |
2395 | } | |
2396 | ||
67702c21 SH |
2397 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
2398 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
2399 | ERROR("Error saving new hooks in clone"); |
2400 | return -1; | |
2401 | } | |
9be53773 SH |
2402 | c->save_config(c, NULL); |
2403 | return 0; | |
2404 | } | |
2405 | ||
9be53773 SH |
2406 | |
2407 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
2408 | { | |
2409 | char newpath[MAXPATHLEN]; | |
2410 | char *oldpath = oldc->lxc_conf->fstab; | |
2411 | int ret; | |
2412 | ||
2413 | if (!oldpath) | |
2414 | return 0; | |
2415 | ||
6b0d5538 SH |
2416 | clear_unexp_config_line(c->lxc_conf, "lxc.mount", false); |
2417 | ||
c32981c3 | 2418 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
2419 | if (!p) |
2420 | return -1; | |
2421 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s%s", | |
2422 | c->config_path, c->name, p); | |
2423 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2424 | ERROR("error printing new path for %s", oldpath); | |
2425 | return -1; | |
2426 | } | |
2427 | if (file_exists(newpath)) { | |
2428 | ERROR("error: fstab file %s exists", newpath); | |
2429 | return -1; | |
2430 | } | |
2431 | ||
2432 | if (copy_file(oldpath, newpath) < 0) { | |
2433 | ERROR("error: copying %s to %s", oldpath, newpath); | |
2434 | return -1; | |
2435 | } | |
2436 | free(c->lxc_conf->fstab); | |
2437 | c->lxc_conf->fstab = strdup(newpath); | |
2438 | if (!c->lxc_conf->fstab) { | |
2439 | ERROR("error: allocating pathname"); | |
2440 | return -1; | |
2441 | } | |
6b0d5538 SH |
2442 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount", newpath)) { |
2443 | ERROR("error saving new lxctab"); | |
2444 | return -1; | |
2445 | } | |
9be53773 SH |
2446 | |
2447 | return 0; | |
2448 | } | |
2449 | ||
dfb31b25 SH |
2450 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
2451 | { | |
2452 | char path0[MAXPATHLEN], path1[MAXPATHLEN]; | |
2453 | int ret; | |
2454 | ||
2455 | ret = snprintf(path0, MAXPATHLEN, "%s/%s/lxc_rdepends", c0->config_path, | |
2456 | c0->name); | |
2457 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2458 | WARN("Error copying reverse dependencies"); | |
2459 | return; | |
2460 | } | |
2461 | ret = snprintf(path1, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
2462 | c->name); | |
2463 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2464 | WARN("Error copying reverse dependencies"); | |
2465 | return; | |
2466 | } | |
2467 | if (copy_file(path0, path1) < 0) { | |
2468 | INFO("Error copying reverse dependencies"); | |
2469 | return; | |
2470 | } | |
2471 | } | |
2472 | ||
2473 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
2474 | { | |
2475 | int ret; | |
2476 | char path[MAXPATHLEN]; | |
2477 | FILE *f; | |
2478 | bool bret; | |
2479 | ||
2480 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
2481 | c->name); | |
2482 | if (ret < 0 || ret >= MAXPATHLEN) | |
2483 | return false; | |
2484 | f = fopen(path, "a"); | |
2485 | if (!f) | |
2486 | return false; | |
2487 | bret = true; | |
2488 | // if anything goes wrong, just return an error | |
2489 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) | |
2490 | bret = false; | |
2491 | if (fclose(f) != 0) | |
2492 | bret = false; | |
2493 | return bret; | |
2494 | } | |
2495 | ||
9be53773 | 2496 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
d659597e | 2497 | const char *newtype, int flags, const char *bdevdata, uint64_t newsize) |
9be53773 SH |
2498 | { |
2499 | struct bdev *bdev; | |
dfb31b25 | 2500 | int need_rdep; |
9be53773 | 2501 | |
1354955b | 2502 | bdev = bdev_copy(c0, c->name, c->config_path, newtype, flags, |
dfb31b25 | 2503 | bdevdata, newsize, &need_rdep); |
9be53773 | 2504 | if (!bdev) { |
dfb31b25 | 2505 | ERROR("Error copying storage"); |
9be53773 SH |
2506 | return -1; |
2507 | } | |
2508 | free(c->lxc_conf->rootfs.path); | |
2509 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
2510 | bdev_put(bdev); | |
dfb31b25 SH |
2511 | if (!c->lxc_conf->rootfs.path) { |
2512 | ERROR("Out of memory while setting storage path"); | |
9be53773 | 2513 | return -1; |
dfb31b25 | 2514 | } |
6b0d5538 SH |
2515 | // We will simply append a new lxc.rootfs entry to the unexpanded config |
2516 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs", false); | |
2517 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs", c->lxc_conf->rootfs.path)) { | |
2518 | ERROR("Error saving new rootfs to cloend config"); | |
d0218321 SH |
2519 | return -1; |
2520 | } | |
eee59f94 SH |
2521 | if (flags & LXC_CLONE_SNAPSHOT) |
2522 | copy_rdepends(c, c0); | |
dfb31b25 SH |
2523 | if (need_rdep) { |
2524 | if (!add_rdepends(c, c0)) | |
2525 | WARN("Error adding reverse dependency from %s to %s", | |
2526 | c->name, c0->name); | |
2527 | } | |
2528 | ||
2529 | mod_all_rdeps(c, true); | |
2530 | ||
9be53773 SH |
2531 | return 0; |
2532 | } | |
2533 | ||
1354955b SH |
2534 | struct clone_update_data { |
2535 | struct lxc_container *c0; | |
2536 | struct lxc_container *c1; | |
2537 | int flags; | |
2538 | char **hookargs; | |
2539 | }; | |
2540 | ||
2541 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 2542 | { |
1354955b SH |
2543 | struct lxc_container *c0 = data->c0; |
2544 | struct lxc_container *c = data->c1; | |
2545 | int flags = data->flags; | |
2546 | char **hookargs = data->hookargs; | |
9be53773 SH |
2547 | int ret = -1; |
2548 | char path[MAXPATHLEN]; | |
2549 | struct bdev *bdev; | |
2550 | FILE *fout; | |
148e91f5 | 2551 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
2552 | |
2553 | /* update hostname in rootfs */ | |
2554 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
2555 | ||
1354955b SH |
2556 | if (setgid(0) < 0) { |
2557 | ERROR("Failed to setgid to 0"); | |
2558 | return -1; | |
2559 | } | |
2560 | if (setuid(0) < 0) { | |
2561 | ERROR("Failed to setuid to 0"); | |
9be53773 | 2562 | return -1; |
1354955b | 2563 | } |
c476bdce SH |
2564 | if (setgroups(0, NULL) < 0) |
2565 | WARN("Failed to clear groups"); | |
9be53773 | 2566 | |
1354955b SH |
2567 | if (unshare(CLONE_NEWNS) < 0) |
2568 | return -1; | |
76a26f55 | 2569 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
9be53773 | 2570 | if (!bdev) |
1354955b | 2571 | return -1; |
cf3ef16d SH |
2572 | if (strcmp(bdev->type, "dir") != 0) { |
2573 | if (unshare(CLONE_NEWNS) < 0) { | |
2574 | ERROR("error unsharing mounts"); | |
e7de366c | 2575 | bdev_put(bdev); |
1354955b | 2576 | return -1; |
cf3ef16d | 2577 | } |
2c6f3fc9 SH |
2578 | if (detect_shared_rootfs()) { |
2579 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
2580 | SYSERROR("Failed to make / rslave"); | |
2581 | ERROR("Continuing..."); | |
2582 | } | |
2583 | } | |
e7de366c SG |
2584 | if (bdev->ops->mount(bdev) < 0) { |
2585 | bdev_put(bdev); | |
1354955b | 2586 | return -1; |
e7de366c | 2587 | } |
cf3ef16d | 2588 | } else { // TODO come up with a better way |
f10fad2f | 2589 | free(bdev->dest); |
cf3ef16d SH |
2590 | bdev->dest = strdup(bdev->src); |
2591 | } | |
148e91f5 SH |
2592 | |
2593 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
2594 | /* Start of environment variable setup for hooks */ | |
1143ed39 DE |
2595 | if (setenv("LXC_SRC_NAME", c0->name, 1)) { |
2596 | SYSERROR("failed to set environment variable for source container name"); | |
2597 | } | |
148e91f5 SH |
2598 | if (setenv("LXC_NAME", c->name, 1)) { |
2599 | SYSERROR("failed to set environment variable for container name"); | |
2600 | } | |
2601 | if (setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { | |
2602 | SYSERROR("failed to set environment variable for config path"); | |
2603 | } | |
24ef39f4 | 2604 | if (setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) { |
148e91f5 SH |
2605 | SYSERROR("failed to set environment variable for rootfs mount"); |
2606 | } | |
2607 | if (setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { | |
2608 | SYSERROR("failed to set environment variable for rootfs mount"); | |
2609 | } | |
2610 | ||
283678ed | 2611 | if (run_lxc_hooks(c->name, "clone", conf, c->get_config_path(c), hookargs)) { |
148e91f5 | 2612 | ERROR("Error executing clone hook for %s", c->name); |
e7de366c | 2613 | bdev_put(bdev); |
1354955b | 2614 | return -1; |
148e91f5 SH |
2615 | } |
2616 | } | |
2617 | ||
2618 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
2619 | ret = snprintf(path, MAXPATHLEN, "%s/etc/hostname", bdev->dest); | |
e7de366c SG |
2620 | bdev_put(bdev); |
2621 | ||
148e91f5 | 2622 | if (ret < 0 || ret >= MAXPATHLEN) |
1354955b | 2623 | return -1; |
8058be39 | 2624 | if (!file_exists(path)) |
1354955b | 2625 | return 0; |
148e91f5 | 2626 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 2627 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 2628 | return 0; |
148e91f5 | 2629 | } |
a684f0b7 ÇO |
2630 | if (fprintf(fout, "%s", c->name) < 0) { |
2631 | fclose(fout); | |
1354955b | 2632 | return -1; |
6849cb5b | 2633 | } |
148e91f5 | 2634 | if (fclose(fout) < 0) |
1354955b | 2635 | return -1; |
9be53773 | 2636 | } |
e7de366c SG |
2637 | else |
2638 | bdev_put(bdev); | |
2639 | ||
1354955b SH |
2640 | return 0; |
2641 | } | |
2642 | ||
2643 | static int clone_update_rootfs_wrapper(void *data) | |
2644 | { | |
2645 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
2646 | return clone_update_rootfs(arg); | |
9be53773 SH |
2647 | } |
2648 | ||
2649 | /* | |
2650 | * We want to support: | |
2651 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
2652 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
2653 | ||
2654 | -s [ implies overlayfs] | |
2655 | -s -B overlayfs | |
2656 | -s -B aufs | |
2657 | ||
2658 | only rootfs gets converted (copied/snapshotted) on clone. | |
2659 | */ | |
2660 | ||
d5752559 | 2661 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 2662 | { |
c32981c3 | 2663 | char *p = strrchr(path, '/'); |
d5752559 | 2664 | int ret = -1; |
9be53773 SH |
2665 | |
2666 | if (!p) | |
2667 | return -1; | |
2668 | *p = '\0'; | |
d5752559 | 2669 | ret = do_create_container_dir(path, conf); |
9be53773 SH |
2670 | *p = '/'; |
2671 | return ret; | |
2672 | } | |
2673 | ||
74a3920a | 2674 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 2675 | const char *lxcpath, int flags, |
d659597e | 2676 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 2677 | char **hookargs) |
9be53773 SH |
2678 | { |
2679 | struct lxc_container *c2 = NULL; | |
2680 | char newpath[MAXPATHLEN]; | |
176d9acb | 2681 | int ret, storage_copied = 0; |
8d2efe40 | 2682 | char *origroot = NULL; |
1354955b | 2683 | struct clone_update_data data; |
9be53773 | 2684 | FILE *fout; |
1354955b | 2685 | pid_t pid; |
9be53773 SH |
2686 | |
2687 | if (!c || !c->is_defined(c)) | |
2688 | return NULL; | |
2689 | ||
5cee8c50 | 2690 | if (container_mem_lock(c)) |
9be53773 SH |
2691 | return NULL; |
2692 | ||
39dc698c | 2693 | if (!is_stopped(c)) { |
9be53773 SH |
2694 | ERROR("error: Original container (%s) is running", c->name); |
2695 | goto out; | |
2696 | } | |
2697 | ||
2698 | // Make sure the container doesn't yet exist. | |
05d53f4c SH |
2699 | if (!newname) |
2700 | newname = c->name; | |
2701 | if (!lxcpath) | |
2702 | lxcpath = c->get_config_path(c); | |
2703 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/config", lxcpath, newname); | |
6849cb5b | 2704 | if (ret < 0 || ret >= MAXPATHLEN) { |
9be53773 SH |
2705 | SYSERROR("clone: failed making config pathname"); |
2706 | goto out; | |
2707 | } | |
2708 | if (file_exists(newpath)) { | |
2709 | ERROR("error: clone: %s exists", newpath); | |
2710 | goto out; | |
2711 | } | |
2712 | ||
d5752559 | 2713 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 2714 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
2715 | ERROR("Error creating container dir for %s", newpath); |
2716 | goto out; | |
2717 | } | |
2718 | ||
2719 | // copy the configuration, tweak it as needed, | |
8d2efe40 SH |
2720 | if (c->lxc_conf->rootfs.path) { |
2721 | origroot = c->lxc_conf->rootfs.path; | |
2722 | c->lxc_conf->rootfs.path = NULL; | |
2723 | } | |
9be53773 SH |
2724 | fout = fopen(newpath, "w"); |
2725 | if (!fout) { | |
2726 | SYSERROR("open %s", newpath); | |
2727 | goto out; | |
2728 | } | |
6b0d5538 | 2729 | write_config(fout, c->lxc_conf); |
9be53773 | 2730 | fclose(fout); |
8d2efe40 | 2731 | c->lxc_conf->rootfs.path = origroot; |
9be53773 | 2732 | |
05d53f4c | 2733 | sprintf(newpath, "%s/%s/rootfs", lxcpath, newname); |
9be53773 SH |
2734 | if (mkdir(newpath, 0755) < 0) { |
2735 | SYSERROR("error creating %s", newpath); | |
2736 | goto out; | |
2737 | } | |
2738 | ||
1354955b SH |
2739 | if (am_unpriv()) { |
2740 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { | |
959aee9c | 2741 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
2742 | goto out; |
2743 | } | |
2744 | } | |
2745 | ||
05d53f4c | 2746 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 2747 | if (!c2) { |
05d53f4c SH |
2748 | ERROR("clone: failed to create new container (%s %s)", newname, |
2749 | lxcpath); | |
9be53773 SH |
2750 | goto out; |
2751 | } | |
8d2efe40 SH |
2752 | |
2753 | // copy/snapshot rootfs's | |
2754 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); | |
2755 | if (ret < 0) | |
2756 | goto out; | |
9be53773 | 2757 | |
6b0d5538 SH |
2758 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); |
2759 | ||
96532523 SH |
2760 | // update utsname |
2761 | if (!set_config_item_locked(c2, "lxc.utsname", newname)) { | |
2762 | ERROR("Error setting new hostname"); | |
2763 | goto out; | |
2764 | } | |
2765 | ||
619256b5 ÇO |
2766 | // copy hooks |
2767 | ret = copyhooks(c, c2); | |
2768 | if (ret < 0) { | |
2769 | ERROR("error copying hooks"); | |
2770 | goto out; | |
9be53773 SH |
2771 | } |
2772 | ||
2773 | if (copy_fstab(c, c2) < 0) { | |
2774 | ERROR("error copying fstab"); | |
9be53773 SH |
2775 | goto out; |
2776 | } | |
2777 | ||
2778 | // update macaddrs | |
6b0d5538 | 2779 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
2780 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
2781 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
2782 | goto out; |
2783 | } | |
2784 | } | |
9be53773 | 2785 | |
176d9acb SH |
2786 | // We've now successfully created c2's storage, so clear it out if we |
2787 | // fail after this | |
2788 | storage_copied = 1; | |
2789 | ||
375c2258 | 2790 | if (!c2->save_config(c2, NULL)) |
9be53773 | 2791 | goto out; |
9be53773 | 2792 | |
1354955b SH |
2793 | if ((pid = fork()) < 0) { |
2794 | SYSERROR("fork"); | |
9be53773 | 2795 | goto out; |
1354955b SH |
2796 | } |
2797 | if (pid > 0) { | |
2798 | ret = wait_for_pid(pid); | |
2799 | if (ret) | |
2800 | goto out; | |
2801 | container_mem_unlock(c); | |
2802 | return c2; | |
2803 | } | |
2804 | data.c0 = c; | |
2805 | data.c1 = c2; | |
2806 | data.flags = flags; | |
2807 | data.hookargs = hookargs; | |
2808 | if (am_unpriv()) | |
2809 | ret = userns_exec_1(c->lxc_conf, clone_update_rootfs_wrapper, | |
2810 | &data); | |
2811 | else | |
2812 | ret = clone_update_rootfs(&data); | |
2813 | if (ret < 0) | |
2814 | exit(1); | |
9be53773 | 2815 | |
5cee8c50 | 2816 | container_mem_unlock(c); |
1354955b | 2817 | exit(0); |
9be53773 SH |
2818 | |
2819 | out: | |
5cee8c50 | 2820 | container_mem_unlock(c); |
375c2258 | 2821 | if (c2) { |
176d9acb SH |
2822 | if (!storage_copied) |
2823 | c2->lxc_conf->rootfs.path = NULL; | |
375c2258 | 2824 | c2->destroy(c2); |
9be53773 | 2825 | lxc_container_put(c2); |
375c2258 | 2826 | } |
9be53773 SH |
2827 | |
2828 | return NULL; | |
2829 | } | |
2830 | ||
06e5650e ÇO |
2831 | static bool lxcapi_rename(struct lxc_container *c, const char *newname) |
2832 | { | |
2833 | struct bdev *bdev; | |
2834 | struct lxc_container *newc; | |
06e5650e | 2835 | |
d693cf93 | 2836 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
2837 | return false; |
2838 | ||
18aa217b SH |
2839 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
2840 | ERROR("Renaming a container with snapshots is not supported"); | |
2841 | return false; | |
2842 | } | |
76a26f55 | 2843 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
06e5650e ÇO |
2844 | if (!bdev) { |
2845 | ERROR("Failed to find original backing store type"); | |
2846 | return false; | |
2847 | } | |
2848 | ||
619256b5 | 2849 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
06e5650e ÇO |
2850 | bdev_put(bdev); |
2851 | if (!newc) { | |
2852 | lxc_container_put(newc); | |
2853 | return false; | |
2854 | } | |
2855 | ||
2856 | if (newc && lxcapi_is_defined(newc)) | |
2857 | lxc_container_put(newc); | |
2858 | ||
18aa217b | 2859 | if (!container_destroy(c)) { |
06e5650e ÇO |
2860 | ERROR("Could not destroy existing container %s", c->name); |
2861 | return false; | |
2862 | } | |
2863 | return true; | |
2864 | } | |
2865 | ||
a0e93eeb CS |
2866 | static int lxcapi_attach(struct lxc_container *c, lxc_attach_exec_t exec_function, void *exec_payload, lxc_attach_options_t *options, pid_t *attached_process) |
2867 | { | |
2868 | if (!c) | |
2869 | return -1; | |
2870 | ||
2871 | return lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
2872 | } | |
2873 | ||
2874 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) | |
2875 | { | |
2876 | lxc_attach_command_t command; | |
2877 | pid_t pid; | |
2878 | int r; | |
2879 | ||
2880 | if (!c) | |
2881 | return -1; | |
2882 | ||
2883 | command.program = (char*)program; | |
2884 | command.argv = (char**)argv; | |
2885 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); | |
2886 | if (r < 0) { | |
2887 | ERROR("ups"); | |
2888 | return r; | |
2889 | } | |
2890 | return lxc_wait_for_pid_status(pid); | |
2891 | } | |
2892 | ||
74a3920a | 2893 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 SH |
2894 | { |
2895 | char *fname; | |
2896 | struct stat sb; | |
2897 | int i = 0, ret; | |
2898 | ||
2899 | fname = alloca(strlen(lxcpath) + 20); | |
2900 | while (1) { | |
2901 | sprintf(fname, "%s/snap%d", lxcpath, i); | |
2902 | ret = stat(fname, &sb); | |
2903 | if (ret != 0) | |
2904 | return i; | |
2905 | i++; | |
2906 | } | |
2907 | } | |
2908 | ||
18aa217b SH |
2909 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
2910 | { | |
2911 | int ret; | |
2912 | /* | |
2913 | * If the old style snapshot path exists, use it | |
2914 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
2915 | */ | |
2916 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps", c->config_path); | |
2917 | if (ret < 0 || ret >= MAXPATHLEN) | |
2918 | return false; | |
2919 | if (dir_exists(snappath)) { | |
2920 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps/%s", c->config_path, c->name); | |
2921 | if (ret < 0 || ret >= MAXPATHLEN) | |
2922 | return false; | |
2923 | return true; | |
2924 | } | |
2925 | ||
2926 | /* | |
2927 | * Use the new style path | |
2928 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
2929 | */ | |
2930 | ret = snprintf(snappath, MAXPATHLEN, "%s/%s/snaps", c->config_path, c->name); | |
2931 | if (ret < 0 || ret >= MAXPATHLEN) | |
2932 | return false; | |
2933 | return true; | |
2934 | } | |
2935 | ||
f0ca2726 | 2936 | static int lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 SH |
2937 | { |
2938 | int i, flags, ret; | |
2939 | struct lxc_container *c2; | |
2940 | char snappath[MAXPATHLEN], newname[20]; | |
2941 | ||
840f05df SH |
2942 | if (!c || !lxcapi_is_defined(c)) |
2943 | return -1; | |
2944 | ||
cdd01be2 SH |
2945 | if (!bdev_can_backup(c->lxc_conf)) { |
2946 | ERROR("%s's backing store cannot be backed up.", c->name); | |
2947 | ERROR("Your container must use another backing store type."); | |
2948 | return -1; | |
2949 | } | |
2950 | ||
18aa217b | 2951 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 2952 | return -1; |
18aa217b | 2953 | |
f5dd1d53 SH |
2954 | i = get_next_index(snappath, c->name); |
2955 | ||
2956 | if (mkdir_p(snappath, 0755) < 0) { | |
2957 | ERROR("Failed to create snapshot directory %s", snappath); | |
2958 | return -1; | |
2959 | } | |
2960 | ||
2961 | ret = snprintf(newname, 20, "snap%d", i); | |
2962 | if (ret < 0 || ret >= 20) | |
2963 | return -1; | |
2964 | ||
0a83cbbb SH |
2965 | /* |
2966 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
2967 | * created in the original container | |
2968 | */ | |
2969 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
2970 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
76a26f55 | 2971 | if (bdev_is_dir(c->lxc_conf, c->lxc_conf->rootfs.path)) { |
8c39f7a4 SH |
2972 | ERROR("Snapshot of directory-backed container requested."); |
2973 | ERROR("Making a copy-clone. If you do want snapshots, then"); | |
1f92162d | 2974 | ERROR("please create an aufs or overlayfs clone first, snapshot that"); |
8c39f7a4 SH |
2975 | ERROR("and keep the original container pristine."); |
2976 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
2977 | } | |
f5dd1d53 SH |
2978 | c2 = c->clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
2979 | if (!c2) { | |
959aee9c | 2980 | ERROR("clone of %s:%s failed", c->config_path, c->name); |
f5dd1d53 SH |
2981 | return -1; |
2982 | } | |
2983 | ||
2984 | lxc_container_put(c2); | |
2985 | ||
2986 | // Now write down the creation time | |
2987 | time_t timer; | |
2988 | char buffer[25]; | |
2989 | struct tm* tm_info; | |
025ed0f3 | 2990 | FILE *f; |
f5dd1d53 SH |
2991 | |
2992 | time(&timer); | |
2993 | tm_info = localtime(&timer); | |
2994 | ||
2995 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", tm_info); | |
2996 | ||
2997 | char *dfnam = alloca(strlen(snappath) + strlen(newname) + 5); | |
2998 | sprintf(dfnam, "%s/%s/ts", snappath, newname); | |
025ed0f3 | 2999 | f = fopen(dfnam, "w"); |
f5dd1d53 | 3000 | if (!f) { |
959aee9c | 3001 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
3002 | return -1; |
3003 | } | |
3004 | if (fprintf(f, "%s", buffer) < 0) { | |
3005 | SYSERROR("Writing timestamp"); | |
3006 | fclose(f); | |
3007 | return -1; | |
3008 | } | |
025ed0f3 | 3009 | ret = fclose(f); |
025ed0f3 | 3010 | if (ret != 0) { |
f5dd1d53 SH |
3011 | SYSERROR("Writing timestamp"); |
3012 | return -1; | |
3013 | } | |
3014 | ||
3015 | if (commentfile) { | |
3016 | // $p / $name / comment \0 | |
3017 | int len = strlen(snappath) + strlen(newname) + 10; | |
3018 | char *path = alloca(len); | |
3019 | sprintf(path, "%s/%s/comment", snappath, newname); | |
3020 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
3021 | } | |
3022 | ||
3023 | return i; | |
3024 | } | |
3025 | ||
3026 | static void lxcsnap_free(struct lxc_snapshot *s) | |
3027 | { | |
f10fad2f ME |
3028 | free(s->name); |
3029 | free(s->comment_pathname); | |
3030 | free(s->timestamp); | |
3031 | free(s->lxcpath); | |
f5dd1d53 SH |
3032 | } |
3033 | ||
3034 | static char *get_snapcomment_path(char* snappath, char *name) | |
3035 | { | |
3036 | // $snappath/$name/comment | |
3037 | int ret, len = strlen(snappath) + strlen(name) + 10; | |
3038 | char *s = malloc(len); | |
3039 | ||
3040 | if (s) { | |
3041 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
3042 | if (ret < 0 || ret >= len) { | |
3043 | free(s); | |
3044 | s = NULL; | |
3045 | } | |
3046 | } | |
3047 | return s; | |
3048 | } | |
3049 | ||
3050 | static char *get_timestamp(char* snappath, char *name) | |
3051 | { | |
3052 | char path[MAXPATHLEN], *s = NULL; | |
3053 | int ret, len; | |
3054 | FILE *fin; | |
3055 | ||
3056 | ret = snprintf(path, MAXPATHLEN, "%s/%s/ts", snappath, name); | |
3057 | if (ret < 0 || ret >= MAXPATHLEN) | |
3058 | return NULL; | |
025ed0f3 | 3059 | fin = fopen(path, "r"); |
025ed0f3 | 3060 | if (!fin) |
f5dd1d53 SH |
3061 | return NULL; |
3062 | (void) fseek(fin, 0, SEEK_END); | |
3063 | len = ftell(fin); | |
3064 | (void) fseek(fin, 0, SEEK_SET); | |
3065 | if (len > 0) { | |
3066 | s = malloc(len+1); | |
3067 | if (s) { | |
3068 | s[len] = '\0'; | |
3069 | if (fread(s, 1, len, fin) != len) { | |
3070 | SYSERROR("reading timestamp"); | |
3071 | free(s); | |
3072 | s = NULL; | |
3073 | } | |
3074 | } | |
3075 | } | |
3076 | fclose(fin); | |
3077 | return s; | |
3078 | } | |
3079 | ||
3080 | static int lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) | |
3081 | { | |
3082 | char snappath[MAXPATHLEN], path2[MAXPATHLEN]; | |
18aa217b | 3083 | int count = 0, ret; |
f5dd1d53 SH |
3084 | struct dirent dirent, *direntp; |
3085 | struct lxc_snapshot *snaps =NULL, *nsnaps; | |
3086 | DIR *dir; | |
3087 | ||
3088 | if (!c || !lxcapi_is_defined(c)) | |
3089 | return -1; | |
c868b261 | 3090 | |
18aa217b | 3091 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
3092 | ERROR("path name too long"); |
3093 | return -1; | |
3094 | } | |
025ed0f3 | 3095 | dir = opendir(snappath); |
025ed0f3 | 3096 | if (!dir) { |
f5dd1d53 SH |
3097 | INFO("failed to open %s - assuming no snapshots", snappath); |
3098 | return 0; | |
3099 | } | |
3100 | ||
3101 | while (!readdir_r(dir, &dirent, &direntp)) { | |
3102 | if (!direntp) | |
3103 | break; | |
3104 | ||
3105 | if (!strcmp(direntp->d_name, ".")) | |
3106 | continue; | |
3107 | ||
3108 | if (!strcmp(direntp->d_name, "..")) | |
3109 | continue; | |
3110 | ||
3111 | ret = snprintf(path2, MAXPATHLEN, "%s/%s/config", snappath, direntp->d_name); | |
3112 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3113 | ERROR("pathname too long"); | |
3114 | goto out_free; | |
3115 | } | |
3116 | if (!file_exists(path2)) | |
3117 | continue; | |
3118 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); | |
3119 | if (!nsnaps) { | |
3120 | SYSERROR("Out of memory"); | |
3121 | goto out_free; | |
3122 | } | |
3123 | snaps = nsnaps; | |
3124 | snaps[count].free = lxcsnap_free; | |
3125 | snaps[count].name = strdup(direntp->d_name); | |
3126 | if (!snaps[count].name) | |
3127 | goto out_free; | |
3128 | snaps[count].lxcpath = strdup(snappath); | |
3129 | if (!snaps[count].lxcpath) { | |
3130 | free(snaps[count].name); | |
3131 | goto out_free; | |
3132 | } | |
3133 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); | |
3134 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
3135 | count++; | |
3136 | } | |
3137 | ||
3138 | if (closedir(dir)) | |
3139 | WARN("failed to close directory"); | |
3140 | ||
3141 | *ret_snaps = snaps; | |
3142 | return count; | |
3143 | ||
3144 | out_free: | |
3145 | if (snaps) { | |
3146 | int i; | |
3147 | for (i=0; i<count; i++) | |
3148 | lxcsnap_free(&snaps[i]); | |
3149 | free(snaps); | |
3150 | } | |
9baa57bd SH |
3151 | if (closedir(dir)) |
3152 | WARN("failed to close directory"); | |
f5dd1d53 SH |
3153 | return -1; |
3154 | } | |
3155 | ||
f0ca2726 | 3156 | static bool lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) |
f5dd1d53 SH |
3157 | { |
3158 | char clonelxcpath[MAXPATHLEN]; | |
18aa217b | 3159 | int flags = 0; |
f5dd1d53 SH |
3160 | struct lxc_container *snap, *rest; |
3161 | struct bdev *bdev; | |
3162 | bool b = false; | |
3163 | ||
3164 | if (!c || !c->name || !c->config_path) | |
3165 | return false; | |
3166 | ||
18aa217b SH |
3167 | if (has_fs_snapshots(c)) { |
3168 | ERROR("container rootfs has dependent snapshots"); | |
3169 | return false; | |
3170 | } | |
3171 | ||
76a26f55 | 3172 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
f5dd1d53 SH |
3173 | if (!bdev) { |
3174 | ERROR("Failed to find original backing store type"); | |
3175 | return false; | |
3176 | } | |
3177 | ||
3178 | if (!newname) | |
3179 | newname = c->name; | |
7e36f87e | 3180 | |
18aa217b | 3181 | if (!get_snappath_dir(c, clonelxcpath)) { |
f5dd1d53 SH |
3182 | bdev_put(bdev); |
3183 | return false; | |
3184 | } | |
3185 | // how should we lock this? | |
3186 | ||
3187 | snap = lxc_container_new(snapname, clonelxcpath); | |
3188 | if (!snap || !lxcapi_is_defined(snap)) { | |
3189 | ERROR("Could not open snapshot %s", snapname); | |
3190 | if (snap) lxc_container_put(snap); | |
3191 | bdev_put(bdev); | |
3192 | return false; | |
3193 | } | |
3194 | ||
7e36f87e | 3195 | if (strcmp(c->name, newname) == 0) { |
18aa217b | 3196 | if (!container_destroy(c)) { |
7e36f87e ÇO |
3197 | ERROR("Could not destroy existing container %s", newname); |
3198 | lxc_container_put(snap); | |
3199 | bdev_put(bdev); | |
3200 | return false; | |
3201 | } | |
3202 | } | |
3203 | ||
de269ee8 SH |
3204 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
3205 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
3206 | rest = lxcapi_clone(snap, newname, c->config_path, flags, | |
3207 | bdev->type, NULL, 0, NULL); | |
f5dd1d53 SH |
3208 | bdev_put(bdev); |
3209 | if (rest && lxcapi_is_defined(rest)) | |
3210 | b = true; | |
3211 | if (rest) | |
3212 | lxc_container_put(rest); | |
3213 | lxc_container_put(snap); | |
3214 | return b; | |
3215 | } | |
3216 | ||
18aa217b | 3217 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 3218 | { |
771d96b3 | 3219 | struct lxc_container *snap = NULL; |
18aa217b | 3220 | bool bret = false; |
771d96b3 ÇO |
3221 | |
3222 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 3223 | if (!snap) { |
771d96b3 ÇO |
3224 | ERROR("Could not find snapshot %s", snapname); |
3225 | goto err; | |
3226 | } | |
3227 | ||
3228 | if (!lxcapi_destroy(snap)) { | |
3229 | ERROR("Could not destroy snapshot %s", snapname); | |
3230 | goto err; | |
3231 | } | |
18aa217b | 3232 | bret = true; |
771d96b3 | 3233 | |
771d96b3 ÇO |
3234 | err: |
3235 | if (snap) | |
3236 | lxc_container_put(snap); | |
18aa217b SH |
3237 | return bret; |
3238 | } | |
3239 | ||
3240 | static bool remove_all_snapshots(const char *path) | |
3241 | { | |
3242 | DIR *dir; | |
3243 | struct dirent dirent, *direntp; | |
3244 | bool bret = true; | |
3245 | ||
3246 | dir = opendir(path); | |
3247 | if (!dir) { | |
3248 | SYSERROR("opendir on snapshot path %s", path); | |
3249 | return false; | |
3250 | } | |
3251 | while (!readdir_r(dir, &dirent, &direntp)) { | |
3252 | if (!direntp) | |
3253 | break; | |
3254 | if (!strcmp(direntp->d_name, ".")) | |
3255 | continue; | |
3256 | if (!strcmp(direntp->d_name, "..")) | |
3257 | continue; | |
3258 | if (!do_snapshot_destroy(direntp->d_name, path)) { | |
3259 | bret = false; | |
3260 | continue; | |
3261 | } | |
3262 | } | |
3263 | ||
3264 | closedir(dir); | |
3265 | ||
3266 | if (rmdir(path)) | |
3267 | SYSERROR("Error removing directory %s", path); | |
3268 | ||
3269 | return bret; | |
3270 | } | |
3271 | ||
3272 | static bool lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) | |
3273 | { | |
3274 | char clonelxcpath[MAXPATHLEN]; | |
3275 | ||
3276 | if (!c || !c->name || !c->config_path || !snapname) | |
3277 | return false; | |
3278 | ||
3279 | if (!get_snappath_dir(c, clonelxcpath)) | |
3280 | return false; | |
3281 | ||
3282 | return do_snapshot_destroy(snapname, clonelxcpath); | |
3283 | } | |
3284 | ||
3285 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
3286 | { | |
3287 | char clonelxcpath[MAXPATHLEN]; | |
3288 | ||
3289 | if (!c || !c->name || !c->config_path) | |
3290 | return false; | |
3291 | ||
3292 | if (!get_snappath_dir(c, clonelxcpath)) | |
3293 | return false; | |
3294 | ||
3295 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
3296 | } |
3297 | ||
b494d2dd SH |
3298 | static bool lxcapi_may_control(struct lxc_container *c) |
3299 | { | |
3300 | return lxc_try_cmd(c->name, c->config_path) == 0; | |
3301 | } | |
3302 | ||
d5aa23e6 SH |
3303 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
3304 | struct stat *st) | |
3305 | { | |
3306 | char chrootpath[MAXPATHLEN]; | |
3307 | char *directory_path = NULL; | |
3308 | pid_t pid; | |
3309 | int ret; | |
3310 | ||
3311 | if ((pid = fork()) < 0) { | |
3312 | SYSERROR("failed to fork a child helper"); | |
3313 | return false; | |
3314 | } | |
3315 | if (pid) { | |
3316 | if (wait_for_pid(pid) != 0) { | |
3317 | ERROR("Failed to create note in guest"); | |
3318 | return false; | |
3319 | } | |
3320 | return true; | |
3321 | } | |
3322 | ||
3323 | /* prepare the path */ | |
3324 | ret = snprintf(chrootpath, MAXPATHLEN, "/proc/%d/root", init_pid); | |
3325 | if (ret < 0 || ret >= MAXPATHLEN) | |
3326 | return false; | |
3327 | ||
6b9324bd | 3328 | if (chroot(chrootpath) < 0) |
d5aa23e6 | 3329 | exit(1); |
6b9324bd | 3330 | if (chdir("/") < 0) |
d5aa23e6 SH |
3331 | exit(1); |
3332 | /* remove path if it exists */ | |
3333 | if(faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW) == 0) { | |
3334 | if (unlink(path) < 0) { | |
3335 | ERROR("unlink failed"); | |
3336 | exit(1); | |
3337 | } | |
3338 | } | |
3339 | if (!add) | |
3340 | exit(0); | |
3341 | ||
3342 | /* create any missing directories */ | |
3343 | directory_path = dirname(strdup(path)); | |
3344 | if (mkdir_p(directory_path, 0755) < 0 && errno != EEXIST) { | |
3345 | ERROR("failed to create directory"); | |
3346 | exit(1); | |
3347 | } | |
3348 | ||
3349 | /* create the device node */ | |
3350 | if (mknod(path, st->st_mode, st->st_rdev) < 0) { | |
3351 | ERROR("mknod failed"); | |
3352 | exit(1); | |
3353 | } | |
3354 | ||
3355 | exit(0); | |
3356 | } | |
3357 | ||
f0ca2726 | 3358 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
3359 | { |
3360 | int ret; | |
3361 | struct stat st; | |
a9a0ed90 | 3362 | char value[MAX_BUFFER]; |
f0ca2726 | 3363 | const char *p; |
a9a0ed90 ÇO |
3364 | |
3365 | /* make sure container is running */ | |
3366 | if (!c->is_running(c)) { | |
3367 | ERROR("container is not running"); | |
d5aa23e6 | 3368 | return false; |
a9a0ed90 ÇO |
3369 | } |
3370 | ||
3371 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
3372 | p = dest_path ? dest_path : src_path; | |
3373 | ||
a9a0ed90 ÇO |
3374 | /* make sure we can access p */ |
3375 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 3376 | return false; |
a9a0ed90 ÇO |
3377 | |
3378 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 3379 | if (S_ISCHR(st.st_mode)) |
a9a0ed90 | 3380 | ret = snprintf(value, MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 3381 | else if (S_ISBLK(st.st_mode)) |
a9a0ed90 ÇO |
3382 | ret = snprintf(value, MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
3383 | else | |
d5aa23e6 | 3384 | return false; |
a9a0ed90 ÇO |
3385 | |
3386 | /* check snprintf return code */ | |
3387 | if (ret < 0 || ret >= MAX_BUFFER) | |
d5aa23e6 | 3388 | return false; |
a9a0ed90 | 3389 | |
d5aa23e6 SH |
3390 | if (!do_add_remove_node(c->init_pid(c), p, add, &st)) |
3391 | return false; | |
a9a0ed90 | 3392 | |
d5aa23e6 | 3393 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 3394 | if (add) { |
a9a0ed90 ÇO |
3395 | if (!c->set_cgroup_item(c, "devices.allow", value)) { |
3396 | ERROR("set_cgroup_item failed while adding the device node"); | |
d5aa23e6 | 3397 | return false; |
a9a0ed90 ÇO |
3398 | } |
3399 | } else { | |
a9a0ed90 ÇO |
3400 | if (!c->set_cgroup_item(c, "devices.deny", value)) { |
3401 | ERROR("set_cgroup_item failed while removing the device node"); | |
d5aa23e6 | 3402 | return false; |
a9a0ed90 ÇO |
3403 | } |
3404 | } | |
d5aa23e6 | 3405 | |
a9a0ed90 | 3406 | return true; |
a9a0ed90 ÇO |
3407 | } |
3408 | ||
f0ca2726 | 3409 | static bool lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 3410 | { |
c868b261 ÇO |
3411 | if (am_unpriv()) { |
3412 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3413 | return false; | |
3414 | } | |
a9a0ed90 ÇO |
3415 | return add_remove_device_node(c, src_path, dest_path, true); |
3416 | } | |
3417 | ||
f0ca2726 | 3418 | static bool lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 3419 | { |
c868b261 ÇO |
3420 | if (am_unpriv()) { |
3421 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3422 | return false; | |
3423 | } | |
a9a0ed90 ÇO |
3424 | return add_remove_device_node(c, src_path, dest_path, false); |
3425 | } | |
3426 | ||
e58fae8f DY |
3427 | static bool lxcapi_attach_interface(struct lxc_container *c, const char *ifname, |
3428 | const char *dst_ifname) | |
3429 | { | |
3430 | int ret = 0; | |
3431 | if (am_unpriv()) { | |
3432 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3433 | return false; | |
3434 | } | |
3435 | ||
3436 | if (!ifname) { | |
3437 | ERROR("No source interface name given"); | |
3438 | return false; | |
3439 | } | |
3440 | ||
3441 | ret = lxc_netdev_isup(ifname); | |
e58fae8f | 3442 | |
e5848d39 SH |
3443 | if (ret > 0) { |
3444 | /* netdev of ifname is up. */ | |
e58fae8f DY |
3445 | ret = lxc_netdev_down(ifname); |
3446 | if (ret) | |
3447 | goto err; | |
3448 | } | |
3449 | ||
3450 | ret = lxc_netdev_move_by_name(ifname, c->init_pid(c), dst_ifname); | |
3451 | if (ret) | |
3452 | goto err; | |
3453 | ||
3454 | return true; | |
e5848d39 | 3455 | |
e58fae8f | 3456 | err: |
e58fae8f DY |
3457 | return false; |
3458 | } | |
3459 | ||
3460 | static bool lxcapi_detach_interface(struct lxc_container *c, const char *ifname, | |
3461 | const char *dst_ifname) | |
3462 | { | |
3463 | pid_t pid, pid_outside; | |
3464 | ||
3465 | if (am_unpriv()) { | |
3466 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3467 | return false; | |
3468 | } | |
3469 | ||
3470 | if (!ifname) { | |
3471 | ERROR("No source interface name given"); | |
3472 | return false; | |
3473 | } | |
3474 | ||
3475 | pid_outside = getpid(); | |
3476 | pid = fork(); | |
3477 | if (pid < 0) { | |
3478 | ERROR("failed to fork task to get interfaces information"); | |
3479 | return false; | |
3480 | } | |
3481 | ||
3482 | if (pid == 0) { // child | |
3483 | int ret = 0; | |
e0f59189 | 3484 | if (!enter_net_ns(c)) { |
e58fae8f DY |
3485 | ERROR("failed to enter namespace"); |
3486 | exit(-1); | |
3487 | } | |
3488 | ||
3489 | ret = lxc_netdev_isup(ifname); | |
3490 | if (ret < 0) | |
3491 | exit(ret); | |
3492 | ||
3493 | /* netdev of ifname is up. */ | |
3494 | if (ret) { | |
3495 | ret = lxc_netdev_down(ifname); | |
3496 | if (ret) | |
3497 | exit(ret); | |
3498 | } | |
3499 | ||
3500 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
3501 | ||
3502 | /* -EINVAL means there is no netdev named as ifanme. */ | |
3503 | if (ret == -EINVAL) { | |
3504 | ERROR("No network device named as %s.", ifname); | |
3505 | } | |
3506 | exit(ret); | |
3507 | } | |
3508 | ||
3509 | if (wait_for_pid(pid) != 0) | |
3510 | return false; | |
3511 | ||
3512 | return true; | |
3513 | } | |
3514 | ||
735f2c6e TA |
3515 | struct criu_opts { |
3516 | /* The type of criu invocation, one of "dump" or "restore" */ | |
3517 | char *action; | |
3518 | ||
3519 | /* The directory to pass to criu */ | |
3520 | char *directory; | |
3521 | ||
3522 | /* The container to dump */ | |
3523 | struct lxc_container *c; | |
3524 | ||
3525 | /* Enable criu verbose mode? */ | |
3526 | bool verbose; | |
3527 | ||
3528 | /* dump: stop the container or not after dumping? */ | |
3529 | bool stop; | |
3530 | ||
3531 | /* restore: the file to write the init process' pid into */ | |
3532 | char *pidfile; | |
2ba7a429 | 3533 | const char *cgroup_path; |
735f2c6e TA |
3534 | }; |
3535 | ||
735f2c6e TA |
3536 | static void exec_criu(struct criu_opts *opts) |
3537 | { | |
fed29fad | 3538 | char **argv, log[PATH_MAX], buf[257]; |
7c8f5230 | 3539 | int static_args = 14, argc = 0, i, ret; |
fed29fad TA |
3540 | int netnr = 0; |
3541 | struct lxc_list *it; | |
735f2c6e TA |
3542 | |
3543 | /* The command line always looks like: | |
7c8f5230 TA |
3544 | * criu $(action) --tcp-established --file-locks --link-remap --force-irmap \ |
3545 | * --manage-cgroups action-script foo.sh -D $(directory) \ | |
3546 | * -o $(directory)/$(action).log | |
735f2c6e TA |
3547 | * +1 for final NULL */ |
3548 | ||
3549 | if (strcmp(opts->action, "dump") == 0) { | |
3550 | /* -t pid */ | |
3551 | static_args += 2; | |
3552 | ||
3553 | /* --leave-running */ | |
3554 | if (!opts->stop) | |
3555 | static_args++; | |
3556 | } else if (strcmp(opts->action, "restore") == 0) { | |
2ba7a429 TA |
3557 | /* --root $(lxc_mount_point) --restore-detached |
3558 | * --restore-sibling --pidfile $foo --cgroup-root $foo */ | |
3559 | static_args += 8; | |
735f2c6e TA |
3560 | } else { |
3561 | return; | |
3562 | } | |
3563 | ||
3564 | if (opts->verbose) | |
3565 | static_args++; | |
3566 | ||
3567 | ret = snprintf(log, PATH_MAX, "%s/%s.log", opts->directory, opts->action); | |
3568 | if (ret < 0 || ret >= PATH_MAX) { | |
3569 | ERROR("logfile name too long\n"); | |
3570 | return; | |
3571 | } | |
3572 | ||
3573 | argv = malloc(static_args * sizeof(*argv)); | |
3574 | if (!argv) | |
3575 | return; | |
3576 | ||
3577 | memset(argv, 0, static_args * sizeof(*argv)); | |
3578 | ||
2566a145 TA |
3579 | #define DECLARE_ARG(arg) \ |
3580 | do { \ | |
3581 | if (arg == NULL) { \ | |
3582 | ERROR("Got NULL argument for criu"); \ | |
3583 | goto err; \ | |
3584 | } \ | |
3585 | argv[argc++] = strdup(arg); \ | |
3586 | if (!argv[argc-1]) \ | |
3587 | goto err; \ | |
735f2c6e TA |
3588 | } while (0) |
3589 | ||
3590 | argv[argc++] = on_path("criu", NULL); | |
3591 | if (!argv[argc-1]) { | |
3592 | ERROR("Couldn't find criu binary\n"); | |
3593 | goto err; | |
3594 | } | |
3595 | ||
3596 | DECLARE_ARG(opts->action); | |
3597 | DECLARE_ARG("--tcp-established"); | |
3598 | DECLARE_ARG("--file-locks"); | |
3599 | DECLARE_ARG("--link-remap"); | |
7c8f5230 | 3600 | DECLARE_ARG("--force-irmap"); |
735f2c6e TA |
3601 | DECLARE_ARG("--manage-cgroups"); |
3602 | DECLARE_ARG("--action-script"); | |
0080bebf | 3603 | DECLARE_ARG(DATADIR "/lxc/lxc-restore-net"); |
735f2c6e TA |
3604 | DECLARE_ARG("-D"); |
3605 | DECLARE_ARG(opts->directory); | |
3606 | DECLARE_ARG("-o"); | |
3607 | DECLARE_ARG(log); | |
3608 | ||
3609 | if (opts->verbose) | |
3610 | DECLARE_ARG("-vvvvvv"); | |
3611 | ||
3612 | if (strcmp(opts->action, "dump") == 0) { | |
3613 | char pid[32]; | |
3614 | ||
3615 | if (sprintf(pid, "%d", lxcapi_init_pid(opts->c)) < 0) | |
3616 | goto err; | |
3617 | ||
3618 | DECLARE_ARG("-t"); | |
3619 | DECLARE_ARG(pid); | |
3620 | if (!opts->stop) | |
3621 | DECLARE_ARG("--leave-running"); | |
3622 | } else if (strcmp(opts->action, "restore") == 0) { | |
735f2c6e TA |
3623 | DECLARE_ARG("--root"); |
3624 | DECLARE_ARG(opts->c->lxc_conf->rootfs.mount); | |
3625 | DECLARE_ARG("--restore-detached"); | |
74bcefea | 3626 | DECLARE_ARG("--restore-sibling"); |
735f2c6e TA |
3627 | DECLARE_ARG("--pidfile"); |
3628 | DECLARE_ARG(opts->pidfile); | |
2ba7a429 TA |
3629 | DECLARE_ARG("--cgroup-root"); |
3630 | DECLARE_ARG(opts->cgroup_path); | |
735f2c6e TA |
3631 | |
3632 | lxc_list_for_each(it, &opts->c->lxc_conf->network) { | |
fed29fad | 3633 | char eth[128], *veth; |
735f2c6e | 3634 | void *m; |
fed29fad TA |
3635 | struct lxc_netdev *n = it->elem; |
3636 | ||
3637 | if (n->name) { | |
e311a562 | 3638 | if (strlen(n->name) >= sizeof(eth)) |
fed29fad | 3639 | goto err; |
e311a562 | 3640 | strncpy(eth, n->name, sizeof(eth)); |
fed29fad TA |
3641 | } else |
3642 | sprintf(eth, "eth%d", netnr); | |
3643 | ||
3644 | veth = n->priv.veth_attr.pair; | |
735f2c6e | 3645 | |
e311a562 TA |
3646 | ret = snprintf(buf, sizeof(buf), "%s=%s", eth, veth); |
3647 | if (ret < 0 || ret >= sizeof(buf)) | |
735f2c6e TA |
3648 | goto err; |
3649 | ||
fed29fad | 3650 | /* final NULL and --veth-pair eth0=vethASDF */ |
735f2c6e TA |
3651 | m = realloc(argv, (argc + 1 + 2) * sizeof(*argv)); |
3652 | if (!m) | |
3653 | goto err; | |
3654 | argv = m; | |
3655 | ||
3656 | DECLARE_ARG("--veth-pair"); | |
3657 | DECLARE_ARG(buf); | |
3658 | argv[argc] = NULL; | |
3659 | ||
735f2c6e TA |
3660 | } |
3661 | } | |
3662 | ||
fed29fad TA |
3663 | netnr = 0; |
3664 | lxc_list_for_each(it, &opts->c->lxc_conf->network) { | |
3665 | struct lxc_netdev *n = it->elem; | |
3666 | char veth[128]; | |
3667 | ||
3668 | /* | |
3669 | * Here, we set some parameters that lxc-restore-net | |
3670 | * will examine to figure out the right network to | |
3671 | * restore. | |
3672 | */ | |
3673 | snprintf(buf, sizeof(buf), "LXC_CRIU_BRIDGE%d", netnr); | |
3674 | if (setenv(buf, n->link, 1)) | |
3675 | goto err; | |
3676 | ||
3677 | if (strcmp("restore", opts->action) == 0) | |
3678 | strncpy(veth, n->priv.veth_attr.pair, sizeof(veth)); | |
3679 | else { | |
3680 | char *tmp; | |
3681 | ret = snprintf(buf, sizeof(buf), "lxc.network.%d.veth.pair", netnr); | |
3682 | if (ret < 0 || ret >= sizeof(buf)) | |
3683 | goto err; | |
3684 | tmp = lxcapi_get_running_config_item(opts->c, buf); | |
3685 | strncpy(veth, tmp, sizeof(veth)); | |
3686 | free(tmp); | |
3687 | } | |
3688 | ||
3689 | snprintf(buf, sizeof(buf), "LXC_CRIU_VETH%d", netnr); | |
3690 | if (setenv(buf, veth, 1)) | |
3691 | goto err; | |
735f2c6e | 3692 | |
fed29fad TA |
3693 | netnr++; |
3694 | } | |
3695 | ||
3696 | #undef DECLARE_ARG | |
735f2c6e TA |
3697 | execv(argv[0], argv); |
3698 | err: | |
3699 | for (i = 0; argv[i]; i++) | |
3700 | free(argv[i]); | |
3701 | free(argv); | |
3702 | } | |
3703 | ||
3704 | /* Check and make sure the container has a configuration that we know CRIU can | |
3705 | * dump. */ | |
3706 | static bool criu_ok(struct lxc_container *c) | |
3707 | { | |
3708 | struct lxc_list *it; | |
3709 | bool found_deny_rule = false; | |
3710 | ||
3711 | if (geteuid()) { | |
3712 | ERROR("Must be root to checkpoint\n"); | |
3713 | return false; | |
3714 | } | |
3715 | ||
3716 | /* We only know how to restore containers with veth networks. */ | |
3717 | lxc_list_for_each(it, &c->lxc_conf->network) { | |
3718 | struct lxc_netdev *n = it->elem; | |
3719 | if (n->type != LXC_NET_VETH && n->type != LXC_NET_NONE) { | |
3720 | ERROR("Found network that is not VETH or NONE\n"); | |
3721 | return false; | |
3722 | } | |
3723 | } | |
3724 | ||
3725 | // These requirements come from http://criu.org/LXC | |
3726 | if (c->lxc_conf->console.path && | |
3727 | strcmp(c->lxc_conf->console.path, "none") != 0) { | |
3728 | ERROR("lxc.console must be none\n"); | |
3729 | return false; | |
3730 | } | |
3731 | ||
3732 | if (c->lxc_conf->tty != 0) { | |
3733 | ERROR("lxc.tty must be 0\n"); | |
3734 | return false; | |
3735 | } | |
3736 | ||
3737 | lxc_list_for_each(it, &c->lxc_conf->cgroup) { | |
3738 | struct lxc_cgroup *cg = it->elem; | |
3739 | if (strcmp(cg->subsystem, "devices.deny") == 0 && | |
3740 | strcmp(cg->value, "c 5:1 rwm") == 0) { | |
3741 | ||
3742 | found_deny_rule = true; | |
3743 | break; | |
3744 | } | |
3745 | } | |
3746 | ||
3747 | if (!found_deny_rule) { | |
3748 | ERROR("couldn't find devices.deny = c 5:1 rwm"); | |
3749 | return false; | |
3750 | } | |
3751 | ||
3752 | return true; | |
3753 | } | |
3754 | ||
bbd4e13e | 3755 | static bool dump_net_info(struct lxc_container *c, char *directory) |
735f2c6e | 3756 | { |
bbd4e13e | 3757 | int netnr; |
735f2c6e | 3758 | struct lxc_list *it; |
735f2c6e TA |
3759 | |
3760 | netnr = 0; | |
3761 | lxc_list_for_each(it, &c->lxc_conf->network) { | |
3762 | char *veth = NULL, *bridge = NULL, veth_path[PATH_MAX], eth[128]; | |
3763 | struct lxc_netdev *n = it->elem; | |
bbd4e13e | 3764 | bool has_error = true; |
735f2c6e TA |
3765 | int pret; |
3766 | ||
3767 | pret = snprintf(veth_path, PATH_MAX, "lxc.network.%d.veth.pair", netnr); | |
bbd4e13e | 3768 | if (pret < 0 || pret >= PATH_MAX) |
735f2c6e | 3769 | goto out; |
735f2c6e TA |
3770 | |
3771 | veth = lxcapi_get_running_config_item(c, veth_path); | |
3772 | if (!veth) { | |
3773 | /* criu_ok() checks that all interfaces are | |
3774 | * LXC_NET{VETH,NONE}, and VETHs should have this | |
3775 | * config */ | |
3776 | assert(n->type == LXC_NET_NONE); | |
3777 | break; | |
3778 | } | |
3779 | ||
735f2c6e | 3780 | bridge = lxcapi_get_running_config_item(c, veth_path); |
bbd4e13e | 3781 | if (!bridge) |
735f2c6e | 3782 | goto out; |
735f2c6e TA |
3783 | |
3784 | pret = snprintf(veth_path, PATH_MAX, "%s/veth%d", directory, netnr); | |
bbd4e13e | 3785 | if (pret < 0 || pret >= PATH_MAX || print_to_file(veth_path, veth) < 0) |
735f2c6e | 3786 | goto out; |
735f2c6e | 3787 | |
735f2c6e | 3788 | if (n->name) { |
bbd4e13e | 3789 | if (strlen(n->name) >= 128) |
735f2c6e | 3790 | goto out; |
735f2c6e TA |
3791 | strncpy(eth, n->name, 128); |
3792 | } else | |
3793 | sprintf(eth, "eth%d", netnr); | |
3794 | ||
bbd4e13e | 3795 | has_error = false; |
735f2c6e | 3796 | out: |
f10fad2f ME |
3797 | free(veth); |
3798 | free(bridge); | |
bbd4e13e | 3799 | if (has_error) |
735f2c6e TA |
3800 | return false; |
3801 | } | |
3802 | ||
bbd4e13e TA |
3803 | return true; |
3804 | } | |
3805 | ||
3806 | static bool lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) | |
3807 | { | |
3808 | pid_t pid; | |
3809 | int status; | |
3810 | ||
3811 | if (!criu_ok(c)) | |
3812 | return false; | |
3813 | ||
3814 | if (mkdir(directory, 0700) < 0 && errno != EEXIST) | |
3815 | return false; | |
3816 | ||
3817 | if (!dump_net_info(c, directory)) | |
3818 | return false; | |
3819 | ||
735f2c6e TA |
3820 | pid = fork(); |
3821 | if (pid < 0) | |
3822 | return false; | |
3823 | ||
3824 | if (pid == 0) { | |
3825 | struct criu_opts os; | |
3826 | ||
3827 | os.action = "dump"; | |
3828 | os.directory = directory; | |
3829 | os.c = c; | |
3830 | os.stop = stop; | |
3831 | os.verbose = verbose; | |
3832 | ||
3833 | /* exec_criu() returning is an error */ | |
3834 | exec_criu(&os); | |
3835 | exit(1); | |
3836 | } else { | |
3837 | pid_t w = waitpid(pid, &status, 0); | |
3838 | if (w == -1) { | |
3839 | perror("waitpid"); | |
3840 | return false; | |
3841 | } | |
3842 | ||
3843 | if (WIFEXITED(status)) { | |
3844 | return !WEXITSTATUS(status); | |
3845 | } | |
3846 | ||
3847 | return false; | |
3848 | } | |
3849 | } | |
3850 | ||
fed29fad | 3851 | static bool restore_net_info(struct lxc_container *c) |
bbd4e13e TA |
3852 | { |
3853 | struct lxc_list *it; | |
3854 | bool has_error = true; | |
bbd4e13e TA |
3855 | |
3856 | if (container_mem_lock(c)) | |
3857 | return false; | |
3858 | ||
3859 | lxc_list_for_each(it, &c->lxc_conf->network) { | |
bbd4e13e | 3860 | struct lxc_netdev *netdev = it->elem; |
fed29fad TA |
3861 | char template[IFNAMSIZ]; |
3862 | snprintf(template, sizeof(template), "vethXXXXXX"); | |
bbd4e13e | 3863 | |
fed29fad TA |
3864 | if (!netdev->priv.veth_attr.pair) |
3865 | netdev->priv.veth_attr.pair = lxc_mkifname(template); | |
bbd4e13e | 3866 | |
bbd4e13e TA |
3867 | if (!netdev->priv.veth_attr.pair) |
3868 | goto out_unlock; | |
bbd4e13e TA |
3869 | } |
3870 | ||
3871 | has_error = false; | |
3872 | ||
3873 | out_unlock: | |
3874 | container_mem_unlock(c); | |
3875 | return !has_error; | |
3876 | } | |
3877 | ||
735f2c6e TA |
3878 | static bool lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) |
3879 | { | |
3880 | pid_t pid; | |
735f2c6e TA |
3881 | struct lxc_rootfs *rootfs; |
3882 | char pidfile[L_tmpnam]; | |
dbb51a43 TA |
3883 | struct lxc_handler *handler; |
3884 | bool has_error = true; | |
735f2c6e TA |
3885 | |
3886 | if (!criu_ok(c)) | |
3887 | return false; | |
3888 | ||
3889 | if (geteuid()) { | |
3890 | ERROR("Must be root to restore\n"); | |
3891 | return false; | |
3892 | } | |
3893 | ||
3894 | if (!tmpnam(pidfile)) | |
3895 | return false; | |
3896 | ||
dbb51a43 TA |
3897 | handler = lxc_init(c->name, c->lxc_conf, c->config_path); |
3898 | if (!handler) | |
3899 | return false; | |
3900 | ||
3901 | if (!cgroup_init(handler)) { | |
3902 | ERROR("failed initing cgroups"); | |
3903 | goto out_fini_handler; | |
3904 | } | |
3905 | ||
2ba7a429 TA |
3906 | if (!cgroup_create(handler)) { |
3907 | ERROR("failed creating groups"); | |
3908 | goto out_fini_handler; | |
3909 | } | |
3910 | ||
fed29fad TA |
3911 | if (!restore_net_info(c)) { |
3912 | ERROR("failed restoring network info"); | |
3913 | goto out_fini_handler; | |
3914 | } | |
3915 | ||
735f2c6e TA |
3916 | pid = fork(); |
3917 | if (pid < 0) | |
dbb51a43 | 3918 | goto out_fini_handler; |
735f2c6e TA |
3919 | |
3920 | if (pid == 0) { | |
3921 | struct criu_opts os; | |
3922 | ||
3923 | if (unshare(CLONE_NEWNS)) | |
6d5b330d | 3924 | exit(1); |
735f2c6e TA |
3925 | |
3926 | /* CRIU needs the lxc root bind mounted so that it is the root of some | |
3927 | * mount. */ | |
3928 | rootfs = &c->lxc_conf->rootfs; | |
3929 | ||
3930 | if (rootfs_is_blockdev(c->lxc_conf)) { | |
3931 | if (do_rootfs_setup(c->lxc_conf, c->name, c->config_path) < 0) | |
6d5b330d | 3932 | exit(1); |
735f2c6e TA |
3933 | } |
3934 | else { | |
3935 | if (mkdir(rootfs->mount, 0755) < 0 && errno != EEXIST) | |
6d5b330d | 3936 | exit(1); |
735f2c6e TA |
3937 | |
3938 | if (mount(rootfs->path, rootfs->mount, NULL, MS_BIND, NULL) < 0) { | |
3939 | rmdir(rootfs->mount); | |
6d5b330d | 3940 | exit(1); |
735f2c6e TA |
3941 | } |
3942 | } | |
3943 | ||
3944 | os.action = "restore"; | |
3945 | os.directory = directory; | |
3946 | os.c = c; | |
3947 | os.pidfile = pidfile; | |
3948 | os.verbose = verbose; | |
2ba7a429 | 3949 | os.cgroup_path = cgroup_canonical_path(handler); |
735f2c6e TA |
3950 | |
3951 | /* exec_criu() returning is an error */ | |
3952 | exec_criu(&os); | |
3953 | umount(rootfs->mount); | |
3954 | rmdir(rootfs->mount); | |
3955 | exit(1); | |
3956 | } else { | |
3957 | int status; | |
3b72c4a0 | 3958 | |
735f2c6e TA |
3959 | pid_t w = waitpid(pid, &status, 0); |
3960 | ||
3961 | if (w == -1) { | |
3962 | perror("waitpid"); | |
dbb51a43 | 3963 | goto out_fini_handler; |
735f2c6e TA |
3964 | } |
3965 | ||
3966 | if (WIFEXITED(status)) { | |
3967 | if (WEXITSTATUS(status)) { | |
3b72c4a0 | 3968 | goto out_fini_handler; |
735f2c6e TA |
3969 | } |
3970 | else { | |
bbd4e13e | 3971 | int ret; |
735f2c6e TA |
3972 | FILE *f = fopen(pidfile, "r"); |
3973 | if (!f) { | |
3974 | perror("reading pidfile"); | |
3975 | ERROR("couldn't read restore's init pidfile %s\n", pidfile); | |
3b72c4a0 | 3976 | goto out_fini_handler; |
735f2c6e TA |
3977 | } |
3978 | ||
3979 | ret = fscanf(f, "%d", (int*) &handler->pid); | |
3980 | fclose(f); | |
3981 | if (ret != 1) { | |
3982 | ERROR("reading restore pid failed"); | |
3b72c4a0 | 3983 | goto out_fini_handler; |
735f2c6e TA |
3984 | } |
3985 | ||
dbb51a43 | 3986 | if (lxc_set_state(c->name, handler, RUNNING)) |
3b72c4a0 | 3987 | goto out_fini_handler; |
735f2c6e | 3988 | } |
c49ecd78 TA |
3989 | } else { |
3990 | ERROR("CRIU was killed with signal %d\n", WTERMSIG(status)); | |
c49ecd78 | 3991 | goto out_fini_handler; |
735f2c6e TA |
3992 | } |
3993 | ||
3994 | if (lxc_poll(c->name, handler)) { | |
3995 | lxc_abort(c->name, handler); | |
dbb51a43 | 3996 | goto out_fini_handler; |
735f2c6e | 3997 | } |
dbb51a43 TA |
3998 | } |
3999 | ||
4000 | has_error = false; | |
735f2c6e | 4001 | |
3b72c4a0 | 4002 | out_fini_handler: |
dbb51a43 TA |
4003 | lxc_fini(c->name, handler); |
4004 | return !has_error; | |
735f2c6e TA |
4005 | } |
4006 | ||
a0e93eeb CS |
4007 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
4008 | { | |
4009 | va_list ap; | |
4010 | const char **argv; | |
4011 | int ret; | |
4012 | ||
4013 | if (!c) | |
4014 | return -1; | |
4015 | ||
4016 | va_start(ap, arg); | |
4017 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
4018 | va_end(ap); | |
4019 | ||
4020 | if (!argv) { | |
4021 | ERROR("Memory allocation error."); | |
4022 | return -1; | |
4023 | } | |
4024 | argv[0] = arg; | |
4025 | ||
4026 | ret = lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); | |
4027 | free((void*)argv); | |
4028 | return ret; | |
4029 | } | |
4030 | ||
afeecbba | 4031 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
4032 | { |
4033 | struct lxc_container *c; | |
72d0e1cb | 4034 | |
18aa217b SH |
4035 | if (!name) |
4036 | return NULL; | |
4037 | ||
72d0e1cb SG |
4038 | c = malloc(sizeof(*c)); |
4039 | if (!c) { | |
4040 | fprintf(stderr, "failed to malloc lxc_container\n"); | |
4041 | return NULL; | |
4042 | } | |
4043 | memset(c, 0, sizeof(*c)); | |
4044 | ||
afeecbba SH |
4045 | if (configpath) |
4046 | c->config_path = strdup(configpath); | |
4047 | else | |
593e8478 | 4048 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
afeecbba | 4049 | |
2a59a681 | 4050 | if (!c->config_path) { |
03fadd16 | 4051 | fprintf(stderr, "Out of memory\n"); |
2a59a681 SH |
4052 | goto err; |
4053 | } | |
4054 | ||
f5dd1d53 | 4055 | remove_trailing_slashes(c->config_path); |
72d0e1cb SG |
4056 | c->name = malloc(strlen(name)+1); |
4057 | if (!c->name) { | |
4058 | fprintf(stderr, "Error allocating lxc_container name\n"); | |
4059 | goto err; | |
4060 | } | |
4061 | strcpy(c->name, name); | |
4062 | ||
4063 | c->numthreads = 1; | |
df271a59 | 4064 | if (!(c->slock = lxc_newlock(c->config_path, name))) { |
72d0e1cb SG |
4065 | fprintf(stderr, "failed to create lock\n"); |
4066 | goto err; | |
4067 | } | |
4068 | ||
df271a59 | 4069 | if (!(c->privlock = lxc_newlock(NULL, NULL))) { |
72d0e1cb SG |
4070 | fprintf(stderr, "failed to alloc privlock\n"); |
4071 | goto err; | |
4072 | } | |
4073 | ||
afeecbba | 4074 | if (!set_config_filename(c)) { |
72d0e1cb SG |
4075 | fprintf(stderr, "Error allocating config file pathname\n"); |
4076 | goto err; | |
4077 | } | |
72d0e1cb | 4078 | |
bac806d1 SH |
4079 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) |
4080 | goto err; | |
72d0e1cb | 4081 | |
3e625e2d SH |
4082 | if (ongoing_create(c) == 2) { |
4083 | ERROR("Error: %s creation was not completed", c->name); | |
18aa217b | 4084 | container_destroy(c); |
4df7f012 | 4085 | lxcapi_clear_config(c); |
3e625e2d | 4086 | } |
a2739df5 | 4087 | c->daemonize = true; |
72cf75fa | 4088 | c->pidfile = NULL; |
3e625e2d | 4089 | |
72d0e1cb SG |
4090 | // assign the member functions |
4091 | c->is_defined = lxcapi_is_defined; | |
4092 | c->state = lxcapi_state; | |
4093 | c->is_running = lxcapi_is_running; | |
4094 | c->freeze = lxcapi_freeze; | |
4095 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 4096 | c->console = lxcapi_console; |
b5159817 | 4097 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
4098 | c->init_pid = lxcapi_init_pid; |
4099 | c->load_config = lxcapi_load_config; | |
4100 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 4101 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
4102 | c->start = lxcapi_start; |
4103 | c->startl = lxcapi_startl; | |
4104 | c->stop = lxcapi_stop; | |
4105 | c->config_file_name = lxcapi_config_file_name; | |
4106 | c->wait = lxcapi_wait; | |
4107 | c->set_config_item = lxcapi_set_config_item; | |
4108 | c->destroy = lxcapi_destroy; | |
18aa217b | 4109 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 4110 | c->rename = lxcapi_rename; |
72d0e1cb SG |
4111 | c->save_config = lxcapi_save_config; |
4112 | c->get_keys = lxcapi_get_keys; | |
4113 | c->create = lxcapi_create; | |
4114 | c->createl = lxcapi_createl; | |
4115 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 4116 | c->reboot = lxcapi_reboot; |
4df7f012 | 4117 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
4118 | c->clear_config_item = lxcapi_clear_config_item; |
4119 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 4120 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
4121 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
4122 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
4123 | c->get_config_path = lxcapi_get_config_path; |
4124 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 4125 | c->clone = lxcapi_clone; |
799f29ab | 4126 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 4127 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
4128 | c->attach = lxcapi_attach; |
4129 | c->attach_run_wait = lxcapi_attach_run_wait; | |
4130 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
4131 | c->snapshot = lxcapi_snapshot; |
4132 | c->snapshot_list = lxcapi_snapshot_list; | |
4133 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 4134 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 4135 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 4136 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
4137 | c->add_device_node = lxcapi_add_device_node; |
4138 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
4139 | c->attach_interface = lxcapi_attach_interface; |
4140 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
4141 | c->checkpoint = lxcapi_checkpoint; |
4142 | c->restore = lxcapi_restore; | |
72d0e1cb SG |
4143 | |
4144 | /* we'll allow the caller to update these later */ | |
ab1bf971 | 4145 | if (lxc_log_init(NULL, "none", NULL, "lxc_container", 0, c->config_path)) { |
72d0e1cb SG |
4146 | fprintf(stderr, "failed to open log\n"); |
4147 | goto err; | |
4148 | } | |
4149 | ||
72d0e1cb SG |
4150 | return c; |
4151 | ||
4152 | err: | |
4153 | lxc_container_free(c); | |
4154 | return NULL; | |
4155 | } | |
4156 | ||
4a7c7daa | 4157 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
4158 | { |
4159 | int i; | |
4160 | ||
4161 | if (states) | |
4162 | for (i=0; i<MAX_STATE; i++) | |
4163 | states[i] = lxc_state2str(i); | |
4164 | return MAX_STATE; | |
4165 | } | |
a41f104b | 4166 | |
a41f104b SH |
4167 | /* |
4168 | * These next two could probably be done smarter with reusing a common function | |
4169 | * with different iterators and tests... | |
4170 | */ | |
4171 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
4172 | { | |
4173 | DIR *dir; | |
4174 | int i, cfound = 0, nfound = 0; | |
4175 | struct dirent dirent, *direntp; | |
4176 | struct lxc_container *c; | |
4177 | ||
4178 | if (!lxcpath) | |
593e8478 | 4179 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 4180 | |
a41f104b | 4181 | dir = opendir(lxcpath); |
a41f104b SH |
4182 | if (!dir) { |
4183 | SYSERROR("opendir on lxcpath"); | |
4184 | return -1; | |
4185 | } | |
4186 | ||
4187 | if (cret) | |
4188 | *cret = NULL; | |
4189 | if (names) | |
4190 | *names = NULL; | |
4191 | ||
4192 | while (!readdir_r(dir, &dirent, &direntp)) { | |
4193 | if (!direntp) | |
4194 | break; | |
4195 | if (!strcmp(direntp->d_name, ".")) | |
4196 | continue; | |
4197 | if (!strcmp(direntp->d_name, "..")) | |
4198 | continue; | |
4199 | ||
4200 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
4201 | continue; | |
4202 | ||
4203 | if (names) { | |
9c88ff1f | 4204 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b SH |
4205 | goto free_bad; |
4206 | } | |
4207 | cfound++; | |
4208 | ||
4209 | if (!cret) { | |
4210 | nfound++; | |
4211 | continue; | |
4212 | } | |
4213 | ||
4214 | c = lxc_container_new(direntp->d_name, lxcpath); | |
4215 | if (!c) { | |
4216 | INFO("Container %s:%s has a config but could not be loaded", | |
4217 | lxcpath, direntp->d_name); | |
4218 | if (names) | |
9c88ff1f ÇO |
4219 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4220 | goto free_bad; | |
a41f104b SH |
4221 | continue; |
4222 | } | |
4223 | if (!lxcapi_is_defined(c)) { | |
4224 | INFO("Container %s:%s has a config but is not defined", | |
4225 | lxcpath, direntp->d_name); | |
4226 | if (names) | |
9c88ff1f ÇO |
4227 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4228 | goto free_bad; | |
a41f104b SH |
4229 | lxc_container_put(c); |
4230 | continue; | |
4231 | } | |
4232 | ||
2871830a | 4233 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
4234 | lxc_container_put(c); |
4235 | goto free_bad; | |
4236 | } | |
4237 | nfound++; | |
4238 | } | |
4239 | ||
a41f104b | 4240 | closedir(dir); |
a41f104b SH |
4241 | return nfound; |
4242 | ||
4243 | free_bad: | |
4244 | if (names && *names) { | |
4245 | for (i=0; i<cfound; i++) | |
4246 | free((*names)[i]); | |
4247 | free(*names); | |
4248 | } | |
4249 | if (cret && *cret) { | |
4250 | for (i=0; i<nfound; i++) | |
4251 | lxc_container_put((*cret)[i]); | |
4252 | free(*cret); | |
4253 | } | |
a41f104b | 4254 | closedir(dir); |
a41f104b SH |
4255 | return -1; |
4256 | } | |
4257 | ||
148a9d27 DE |
4258 | int list_active_containers(const char *lxcpath, char ***nret, |
4259 | struct lxc_container ***cret) | |
a41f104b | 4260 | { |
148a9d27 | 4261 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
4262 | int lxcpath_len; |
4263 | char *line = NULL; | |
148a9d27 | 4264 | char **ct_name = NULL; |
a41f104b SH |
4265 | size_t len = 0; |
4266 | struct lxc_container *c; | |
88556fd7 | 4267 | bool is_hashed; |
a41f104b SH |
4268 | |
4269 | if (!lxcpath) | |
593e8478 | 4270 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
4271 | lxcpath_len = strlen(lxcpath); |
4272 | ||
4273 | if (cret) | |
4274 | *cret = NULL; | |
148a9d27 DE |
4275 | if (nret) |
4276 | *nret = NULL; | |
a41f104b | 4277 | |
a41f104b | 4278 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
4279 | if (!f) |
4280 | return -1; | |
4281 | ||
4282 | while (getline(&line, &len, f) != -1) { | |
88556fd7 | 4283 | |
0f8f9c8a | 4284 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
4285 | if (!p) |
4286 | continue; | |
4287 | p++; | |
4288 | if (*p != 0x40) | |
4289 | continue; | |
4290 | p++; | |
88556fd7 ÇO |
4291 | |
4292 | is_hashed = false; | |
4293 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { | |
4294 | p += lxcpath_len; | |
4295 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
4296 | p += 4; | |
4297 | is_hashed = true; | |
4298 | } else { | |
a41f104b | 4299 | continue; |
88556fd7 ÇO |
4300 | } |
4301 | ||
a41f104b SH |
4302 | while (*p == '/') |
4303 | p++; | |
4304 | ||
4305 | // Now p is the start of lxc_name | |
4306 | p2 = index(p, '/'); | |
4307 | if (!p2 || strncmp(p2, "/command", 8) != 0) | |
4308 | continue; | |
4309 | *p2 = '\0'; | |
4310 | ||
88556fd7 ÇO |
4311 | if (is_hashed) { |
4312 | if (strncmp(lxcpath, lxc_cmd_get_lxcpath(p), lxcpath_len) != 0) | |
4313 | continue; | |
4314 | p = lxc_cmd_get_name(p); | |
4315 | } | |
4316 | ||
148a9d27 | 4317 | if (array_contains(&ct_name, p, ct_name_cnt)) |
9c88ff1f ÇO |
4318 | continue; |
4319 | ||
148a9d27 DE |
4320 | if (!add_to_array(&ct_name, p, ct_name_cnt)) |
4321 | goto free_cret_list; | |
9c88ff1f | 4322 | |
148a9d27 | 4323 | ct_name_cnt++; |
a41f104b | 4324 | |
148a9d27 | 4325 | if (!cret) |
a41f104b | 4326 | continue; |
a41f104b SH |
4327 | |
4328 | c = lxc_container_new(p, lxcpath); | |
4329 | if (!c) { | |
4330 | INFO("Container %s:%s is running but could not be loaded", | |
4331 | lxcpath, p); | |
148a9d27 | 4332 | remove_from_array(&ct_name, p, ct_name_cnt--); |
a41f104b SH |
4333 | continue; |
4334 | } | |
4335 | ||
4336 | /* | |
4337 | * If this is an anonymous container, then is_defined *can* | |
4338 | * return false. So we don't do that check. Count on the | |
4339 | * fact that the command socket exists. | |
4340 | */ | |
4341 | ||
148a9d27 | 4342 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 4343 | lxc_container_put(c); |
148a9d27 | 4344 | goto free_cret_list; |
a41f104b | 4345 | } |
148a9d27 | 4346 | cret_cnt++; |
a41f104b SH |
4347 | } |
4348 | ||
148a9d27 DE |
4349 | assert(!nret || !cret || cret_cnt == ct_name_cnt); |
4350 | ret = ct_name_cnt; | |
4351 | if (nret) | |
4352 | *nret = ct_name; | |
4353 | else | |
4354 | goto free_ct_name; | |
4355 | goto out; | |
a41f104b | 4356 | |
148a9d27 | 4357 | free_cret_list: |
a41f104b | 4358 | if (cret && *cret) { |
148a9d27 | 4359 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
4360 | lxc_container_put((*cret)[i]); |
4361 | free(*cret); | |
4362 | } | |
148a9d27 DE |
4363 | |
4364 | free_ct_name: | |
4365 | if (ct_name) { | |
4366 | for (i = 0; i < ct_name_cnt; i++) | |
4367 | free(ct_name[i]); | |
4368 | free(ct_name); | |
4369 | } | |
4370 | ||
4371 | out: | |
f10fad2f | 4372 | free(line); |
e853a32d | 4373 | |
a41f104b | 4374 | fclose(f); |
148a9d27 | 4375 | return ret; |
a41f104b | 4376 | } |
2871830a DE |
4377 | |
4378 | int list_all_containers(const char *lxcpath, char ***nret, | |
4379 | struct lxc_container ***cret) | |
4380 | { | |
4381 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
4382 | char **active_name; | |
4383 | char **ct_name; | |
4384 | struct lxc_container **ct_list = NULL; | |
4385 | ||
4386 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
4387 | if (ct_cnt < 0) | |
4388 | return ct_cnt; | |
4389 | ||
4390 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
4391 | if (active_cnt < 0) { | |
4392 | ret = active_cnt; | |
4393 | goto free_ct_name; | |
4394 | } | |
4395 | ||
4396 | for (i = 0; i < active_cnt; i++) { | |
4397 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
4398 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
4399 | ret = -1; | |
4400 | goto free_active_name; | |
4401 | } | |
4402 | ct_cnt++; | |
4403 | } | |
4404 | free(active_name[i]); | |
4405 | active_name[i] = NULL; | |
4406 | } | |
4407 | free(active_name); | |
4408 | active_name = NULL; | |
4409 | active_cnt = 0; | |
4410 | ||
4411 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
4412 | struct lxc_container *c; | |
4413 | ||
4414 | c = lxc_container_new(ct_name[i], lxcpath); | |
4415 | if (!c) { | |
4416 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
4417 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
4418 | continue; | |
4419 | } | |
4420 | ||
4421 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
4422 | lxc_container_put(c); | |
4423 | ret = -1; | |
4424 | goto free_ct_list; | |
4425 | } | |
4426 | ct_list_cnt++; | |
4427 | } | |
4428 | ||
4429 | if (cret) | |
4430 | *cret = ct_list; | |
4431 | ||
4432 | if (nret) | |
4433 | *nret = ct_name; | |
4434 | else { | |
4435 | ret = ct_cnt; | |
4436 | goto free_ct_name; | |
4437 | } | |
4438 | return ct_cnt; | |
4439 | ||
4440 | free_ct_list: | |
4441 | for (i = 0; i < ct_list_cnt; i++) { | |
4442 | lxc_container_put(ct_list[i]); | |
4443 | } | |
f10fad2f | 4444 | free(ct_list); |
2871830a DE |
4445 | |
4446 | free_active_name: | |
4447 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 4448 | free(active_name[i]); |
2871830a | 4449 | } |
f10fad2f | 4450 | free(active_name); |
2871830a DE |
4451 | |
4452 | free_ct_name: | |
4453 | for (i = 0; i < ct_cnt; i++) { | |
4454 | free(ct_name[i]); | |
4455 | } | |
4456 | free(ct_name); | |
4457 | return ret; | |
4458 | } |