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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 |
0ea055b3 | 22 | #include <sys/mman.h> |
148a9d27 | 23 | #include <assert.h> |
a0e93eeb | 24 | #include <stdarg.h> |
71454076 | 25 | #include <pthread.h> |
9be53773 SH |
26 | #include <unistd.h> |
27 | #include <sys/types.h> | |
28 | #include <sys/wait.h> | |
4de2791f | 29 | #include <sys/mount.h> |
9be53773 | 30 | #include <errno.h> |
93dc5327 | 31 | #include <fcntl.h> |
9be53773 | 32 | #include <sched.h> |
f5dd1d53 | 33 | #include <dirent.h> |
f2363e38 ÇO |
34 | #include <sched.h> |
35 | #include <arpa/inet.h> | |
36 | #include <libgen.h> | |
d659597e | 37 | #include <stdint.h> |
c476bdce | 38 | #include <grp.h> |
9fc7f8c0 | 39 | #include <stdio.h> |
5f7eba0b | 40 | #include <sys/syscall.h> |
f2363e38 ÇO |
41 | |
42 | #include <lxc/lxccontainer.h> | |
43 | #include <lxc/version.h> | |
e58fae8f | 44 | #include <lxc/network.h> |
f2363e38 | 45 | |
9be53773 | 46 | #include "config.h" |
72d0e1cb SG |
47 | #include "lxc.h" |
48 | #include "state.h" | |
72d0e1cb | 49 | #include "conf.h" |
72d0e1cb | 50 | #include "confile.h" |
b5159817 | 51 | #include "console.h" |
72d0e1cb SG |
52 | #include "cgroup.h" |
53 | #include "commands.h" | |
e29fe1dd | 54 | #include "criu.h" |
72d0e1cb | 55 | #include "log.h" |
9be53773 | 56 | #include "bdev.h" |
6a44839f | 57 | #include "utils.h" |
a0e93eeb | 58 | #include "attach.h" |
f2363e38 ÇO |
59 | #include "monitor.h" |
60 | #include "namespace.h" | |
fed29fad | 61 | #include "network.h" |
95ee490b | 62 | #include "lxclock.h" |
735f2c6e | 63 | #include "sync.h" |
4ba0d9af SG |
64 | |
65 | #if HAVE_IFADDRS_H | |
9c83a661 | 66 | #include <ifaddrs.h> |
4ba0d9af SG |
67 | #else |
68 | #include <../include/ifaddrs.h> | |
69 | #endif | |
72d0e1cb | 70 | |
684f79a5 SG |
71 | #if IS_BIONIC |
72 | #include <../include/lxcmntent.h> | |
73 | #else | |
74 | #include <mntent.h> | |
75 | #endif | |
76 | ||
a9a0ed90 ÇO |
77 | #define MAX_BUFFER 4096 |
78 | ||
c868b261 ÇO |
79 | #define NOT_SUPPORTED_ERROR "the requested function %s is not currently supported with unprivileged containers" |
80 | ||
5f7eba0b SG |
81 | /* Define faccessat() if missing from the C library */ |
82 | #ifndef HAVE_FACCESSAT | |
83 | static int faccessat(int __fd, const char *__file, int __type, int __flag) | |
84 | { | |
85 | #ifdef __NR_faccessat | |
86 | return syscall(__NR_faccessat, __fd, __file, __type, __flag); | |
87 | #else | |
88 | errno = ENOSYS; | |
89 | return -1; | |
90 | #endif | |
91 | } | |
92 | #endif | |
93 | ||
72d0e1cb SG |
94 | lxc_log_define(lxc_container, lxc); |
95 | ||
858377e4 SH |
96 | static bool do_lxcapi_destroy(struct lxc_container *c); |
97 | static const char *lxcapi_get_config_path(struct lxc_container *c); | |
98 | #define do_lxcapi_get_config_path(c) lxcapi_get_config_path(c) | |
99 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v); | |
100 | static bool container_destroy(struct lxc_container *c); | |
101 | static bool get_snappath_dir(struct lxc_container *c, char *snappath); | |
102 | static bool lxcapi_snapshot_destroy_all(struct lxc_container *c); | |
103 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file); | |
104 | ||
a41f104b SH |
105 | static bool config_file_exists(const char *lxcpath, const char *cname) |
106 | { | |
107 | /* $lxcpath + '/' + $cname + '/config' + \0 */ | |
108 | int ret, len = strlen(lxcpath) + strlen(cname) + 9; | |
109 | char *fname = alloca(len); | |
110 | ||
111 | ret = snprintf(fname, len, "%s/%s/config", lxcpath, cname); | |
112 | if (ret < 0 || ret >= len) | |
113 | return false; | |
114 | ||
115 | return file_exists(fname); | |
116 | } | |
117 | ||
3e625e2d SH |
118 | /* |
119 | * A few functions to help detect when a container creation failed. | |
120 | * If a container creation was killed partway through, then trying | |
121 | * to actually start that container could harm the host. We detect | |
122 | * this by creating a 'partial' file under the container directory, | |
123 | * and keeping an advisory lock. When container creation completes, | |
124 | * we remove that file. When we load or try to start a container, if | |
125 | * we find that file, without a flock, we remove the container. | |
126 | */ | |
74a3920a | 127 | static int ongoing_create(struct lxc_container *c) |
3e625e2d SH |
128 | { |
129 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
130 | char *path = alloca(len); | |
131 | int fd, ret; | |
93dc5327 SH |
132 | struct flock lk; |
133 | ||
3e625e2d SH |
134 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
135 | if (ret < 0 || ret >= len) { | |
136 | ERROR("Error writing partial pathname"); | |
137 | return -1; | |
138 | } | |
139 | ||
140 | if (!file_exists(path)) | |
141 | return 0; | |
025ed0f3 | 142 | fd = open(path, O_RDWR); |
025ed0f3 | 143 | if (fd < 0) { |
3e625e2d SH |
144 | // give benefit of the doubt |
145 | SYSERROR("Error opening partial file"); | |
3e625e2d SH |
146 | return 0; |
147 | } | |
93dc5327 SH |
148 | lk.l_type = F_WRLCK; |
149 | lk.l_whence = SEEK_SET; | |
150 | lk.l_start = 0; | |
151 | lk.l_len = 0; | |
152 | lk.l_pid = -1; | |
153 | if (fcntl(fd, F_GETLK, &lk) == 0 && lk.l_pid != -1) { | |
3e625e2d SH |
154 | // create is still ongoing |
155 | close(fd); | |
3e625e2d SH |
156 | return 1; |
157 | } | |
158 | // create completed but partial is still there. | |
159 | close(fd); | |
3e625e2d SH |
160 | return 2; |
161 | } | |
162 | ||
74a3920a | 163 | static int create_partial(struct lxc_container *c) |
3e625e2d SH |
164 | { |
165 | // $lxcpath + '/' + $name + '/partial' + \0 | |
166 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
167 | char *path = alloca(len); | |
168 | int fd, ret; | |
93dc5327 SH |
169 | struct flock lk; |
170 | ||
3e625e2d SH |
171 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); |
172 | if (ret < 0 || ret >= len) { | |
173 | ERROR("Error writing partial pathname"); | |
174 | return -1; | |
175 | } | |
93dc5327 | 176 | if ((fd=open(path, O_RDWR | O_CREAT | O_EXCL, 0755)) < 0) { |
3e625e2d | 177 | SYSERROR("Erorr creating partial file"); |
3e625e2d SH |
178 | return -1; |
179 | } | |
93dc5327 SH |
180 | lk.l_type = F_WRLCK; |
181 | lk.l_whence = SEEK_SET; | |
182 | lk.l_start = 0; | |
183 | lk.l_len = 0; | |
184 | if (fcntl(fd, F_SETLKW, &lk) < 0) { | |
3e625e2d SH |
185 | SYSERROR("Error locking partial file %s", path); |
186 | close(fd); | |
3e625e2d SH |
187 | return -1; |
188 | } | |
3e625e2d SH |
189 | |
190 | return fd; | |
191 | } | |
192 | ||
74a3920a | 193 | static void remove_partial(struct lxc_container *c, int fd) |
3e625e2d SH |
194 | { |
195 | // $lxcpath + '/' + $name + '/partial' + \0 | |
196 | int len = strlen(c->config_path) + strlen(c->name) + 10; | |
197 | char *path = alloca(len); | |
198 | int ret; | |
199 | ||
200 | close(fd); | |
201 | ret = snprintf(path, len, "%s/%s/partial", c->config_path, c->name); | |
202 | if (ret < 0 || ret >= len) { | |
203 | ERROR("Error writing partial pathname"); | |
204 | return; | |
205 | } | |
3e625e2d SH |
206 | if (unlink(path) < 0) |
207 | SYSERROR("Error unlink partial file %s", path); | |
3e625e2d SH |
208 | } |
209 | ||
72d0e1cb | 210 | /* LOCKING |
3bc449ed SH |
211 | * 1. container_mem_lock(c) protects the struct lxc_container from multiple threads. |
212 | * 2. container_disk_lock(c) protects the on-disk container data - in particular the | |
213 | * container configuration file. | |
214 | * The container_disk_lock also takes the container_mem_lock. | |
215 | * 3. thread_mutex protects process data (ex: fd table) from multiple threads. | |
72d0e1cb SG |
216 | * NOTHING mutexes two independent programs with their own struct |
217 | * lxc_container for the same c->name, between API calls. For instance, | |
218 | * c->config_read(); c->start(); Between those calls, data on disk | |
219 | * could change (which shouldn't bother the caller unless for instance | |
220 | * the rootfs get moved). c->config_read(); update; c->config_write(); | |
221 | * Two such updaters could race. The callers should therefore check their | |
222 | * results. Trying to prevent that would necessarily expose us to deadlocks | |
223 | * due to hung callers. So I prefer to keep the locks only within our own | |
224 | * functions, not across functions. | |
225 | * | |
3bc449ed | 226 | * If you're going to clone while holding a lxccontainer, increment |
72d0e1cb SG |
227 | * c->numthreads (under privlock) before forking. When deleting, |
228 | * decrement numthreads under privlock, then if it hits 0 you can delete. | |
229 | * Do not ever use a lxccontainer whose numthreads you did not bump. | |
230 | */ | |
231 | ||
232 | static void lxc_container_free(struct lxc_container *c) | |
233 | { | |
234 | if (!c) | |
235 | return; | |
236 | ||
f10fad2f ME |
237 | free(c->configfile); |
238 | c->configfile = NULL; | |
239 | free(c->error_string); | |
240 | c->error_string = NULL; | |
d95db067 | 241 | if (c->slock) { |
df271a59 | 242 | lxc_putlock(c->slock); |
d95db067 DE |
243 | c->slock = NULL; |
244 | } | |
72d0e1cb | 245 | if (c->privlock) { |
df271a59 | 246 | lxc_putlock(c->privlock); |
72d0e1cb SG |
247 | c->privlock = NULL; |
248 | } | |
f10fad2f ME |
249 | free(c->name); |
250 | c->name = NULL; | |
d95db067 DE |
251 | if (c->lxc_conf) { |
252 | lxc_conf_free(c->lxc_conf); | |
253 | c->lxc_conf = NULL; | |
254 | } | |
f10fad2f ME |
255 | free(c->config_path); |
256 | c->config_path = NULL; | |
72cf75fa | 257 | |
72d0e1cb SG |
258 | free(c); |
259 | } | |
260 | ||
43d1aa34 SH |
261 | /* |
262 | * Consider the following case: | |
263 | freer | racing get()er | |
264 | ================================================================== | |
265 | lxc_container_put() | lxc_container_get() | |
266 | \ lxclock(c->privlock) | c->numthreads < 1? (no) | |
267 | \ c->numthreads = 0 | \ lxclock(c->privlock) -> waits | |
268 | \ lxcunlock() | \ | |
269 | \ lxc_container_free() | \ lxclock() returns | |
270 | | \ c->numthreads < 1 -> return 0 | |
271 | \ \ (free stuff) | | |
272 | \ \ sem_destroy(privlock) | | |
273 | ||
274 | * When the get()er checks numthreads the first time, one of the following | |
275 | * is true: | |
276 | * 1. freer has set numthreads = 0. get() returns 0 | |
277 | * 2. freer is between lxclock and setting numthreads to 0. get()er will | |
278 | * sem_wait on privlock, get lxclock after freer() drops it, then see | |
279 | * numthreads is 0 and exit without touching lxclock again.. | |
280 | * 3. freer has not yet locked privlock. If get()er runs first, then put()er | |
281 | * will see --numthreads = 1 and not call lxc_container_free(). | |
282 | */ | |
283 | ||
72d0e1cb SG |
284 | int lxc_container_get(struct lxc_container *c) |
285 | { | |
286 | if (!c) | |
287 | return 0; | |
288 | ||
43d1aa34 SH |
289 | // if someone else has already started freeing the container, don't |
290 | // try to take the lock, which may be invalid | |
291 | if (c->numthreads < 1) | |
292 | return 0; | |
293 | ||
5cee8c50 | 294 | if (container_mem_lock(c)) |
72d0e1cb SG |
295 | return 0; |
296 | if (c->numthreads < 1) { | |
297 | // bail without trying to unlock, bc the privlock is now probably | |
298 | // in freed memory | |
299 | return 0; | |
300 | } | |
301 | c->numthreads++; | |
5cee8c50 | 302 | container_mem_unlock(c); |
72d0e1cb SG |
303 | return 1; |
304 | } | |
305 | ||
306 | int lxc_container_put(struct lxc_container *c) | |
307 | { | |
308 | if (!c) | |
309 | return -1; | |
5cee8c50 | 310 | if (container_mem_lock(c)) |
72d0e1cb SG |
311 | return -1; |
312 | if (--c->numthreads < 1) { | |
5cee8c50 | 313 | container_mem_unlock(c); |
72d0e1cb SG |
314 | lxc_container_free(c); |
315 | return 1; | |
316 | } | |
5cee8c50 | 317 | container_mem_unlock(c); |
72d0e1cb SG |
318 | return 0; |
319 | } | |
320 | ||
858377e4 | 321 | static bool do_lxcapi_is_defined(struct lxc_container *c) |
72d0e1cb SG |
322 | { |
323 | struct stat statbuf; | |
324 | bool ret = false; | |
325 | int statret; | |
326 | ||
327 | if (!c) | |
328 | return false; | |
329 | ||
5cee8c50 | 330 | if (container_mem_lock(c)) |
72d0e1cb SG |
331 | return false; |
332 | if (!c->configfile) | |
333 | goto out; | |
334 | statret = stat(c->configfile, &statbuf); | |
335 | if (statret != 0) | |
336 | goto out; | |
337 | ret = true; | |
338 | ||
339 | out: | |
5cee8c50 | 340 | container_mem_unlock(c); |
72d0e1cb SG |
341 | return ret; |
342 | } | |
343 | ||
858377e4 SH |
344 | #define WRAP_API(rettype, fnname) \ |
345 | static rettype fnname(struct lxc_container *c) \ | |
346 | { \ | |
347 | rettype ret; \ | |
348 | current_config = c ? c->lxc_conf : NULL; \ | |
349 | ret = do_##fnname(c); \ | |
350 | current_config = NULL; \ | |
351 | return ret; \ | |
352 | } | |
353 | ||
354 | #define WRAP_API_1(rettype, fnname, t1) \ | |
355 | static rettype fnname(struct lxc_container *c, t1 a1) \ | |
356 | { \ | |
357 | rettype ret; \ | |
358 | current_config = c ? c->lxc_conf : NULL; \ | |
359 | ret = do_##fnname(c, a1); \ | |
360 | current_config = NULL; \ | |
361 | return ret; \ | |
362 | } | |
363 | ||
364 | #define WRAP_API_2(rettype, fnname, t1, t2) \ | |
365 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2) \ | |
366 | { \ | |
367 | rettype ret; \ | |
368 | current_config = c ? c->lxc_conf : NULL; \ | |
369 | ret = do_##fnname(c, a1, a2); \ | |
370 | current_config = NULL; \ | |
371 | return ret; \ | |
372 | } | |
373 | ||
374 | #define WRAP_API_3(rettype, fnname, t1, t2, t3) \ | |
375 | static rettype fnname(struct lxc_container *c, t1 a1, t2 a2, t3 a3) \ | |
376 | { \ | |
377 | rettype ret; \ | |
378 | current_config = c ? c->lxc_conf : NULL; \ | |
379 | ret = do_##fnname(c, a1, a2, a3); \ | |
380 | current_config = NULL; \ | |
381 | return ret; \ | |
382 | } | |
383 | ||
384 | WRAP_API(bool, lxcapi_is_defined) | |
385 | ||
386 | static const char *do_lxcapi_state(struct lxc_container *c) | |
72d0e1cb | 387 | { |
72d0e1cb SG |
388 | lxc_state_t s; |
389 | ||
390 | if (!c) | |
391 | return NULL; | |
13f5be62 | 392 | s = lxc_getstate(c->name, c->config_path); |
39dc698c | 393 | return lxc_state2str(s); |
72d0e1cb SG |
394 | } |
395 | ||
858377e4 SH |
396 | WRAP_API(const char *, lxcapi_state) |
397 | ||
39dc698c | 398 | static bool is_stopped(struct lxc_container *c) |
794dd120 SH |
399 | { |
400 | lxc_state_t s; | |
13f5be62 | 401 | s = lxc_getstate(c->name, c->config_path); |
794dd120 SH |
402 | return (s == STOPPED); |
403 | } | |
404 | ||
858377e4 | 405 | static bool do_lxcapi_is_running(struct lxc_container *c) |
72d0e1cb SG |
406 | { |
407 | const char *s; | |
408 | ||
409 | if (!c) | |
410 | return false; | |
858377e4 | 411 | s = do_lxcapi_state(c); |
72d0e1cb SG |
412 | if (!s || strcmp(s, "STOPPED") == 0) |
413 | return false; | |
414 | return true; | |
415 | } | |
416 | ||
858377e4 SH |
417 | WRAP_API(bool, lxcapi_is_running) |
418 | ||
419 | static bool do_lxcapi_freeze(struct lxc_container *c) | |
72d0e1cb SG |
420 | { |
421 | int ret; | |
422 | if (!c) | |
423 | return false; | |
424 | ||
9123e471 | 425 | ret = lxc_freeze(c->name, c->config_path); |
72d0e1cb SG |
426 | if (ret) |
427 | return false; | |
428 | return true; | |
429 | } | |
430 | ||
858377e4 SH |
431 | WRAP_API(bool, lxcapi_freeze) |
432 | ||
433 | static bool do_lxcapi_unfreeze(struct lxc_container *c) | |
72d0e1cb SG |
434 | { |
435 | int ret; | |
436 | if (!c) | |
437 | return false; | |
438 | ||
9123e471 | 439 | ret = lxc_unfreeze(c->name, c->config_path); |
72d0e1cb SG |
440 | if (ret) |
441 | return false; | |
442 | return true; | |
443 | } | |
444 | ||
858377e4 SH |
445 | WRAP_API(bool, lxcapi_unfreeze) |
446 | ||
447 | static int do_lxcapi_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd) | |
0115f8fd DE |
448 | { |
449 | int ttyfd; | |
450 | if (!c) | |
451 | return -1; | |
452 | ||
b5159817 | 453 | ttyfd = lxc_console_getfd(c, ttynum, masterfd); |
0115f8fd DE |
454 | return ttyfd; |
455 | } | |
456 | ||
858377e4 SH |
457 | WRAP_API_2(int, lxcapi_console_getfd, int *, int *) |
458 | ||
b5159817 DE |
459 | static int lxcapi_console(struct lxc_container *c, int ttynum, int stdinfd, |
460 | int stdoutfd, int stderrfd, int escape) | |
461 | { | |
858377e4 SH |
462 | int ret; |
463 | ||
464 | if (!c) | |
465 | return -1; | |
466 | ||
467 | current_config = c->lxc_conf; | |
468 | ret = lxc_console(c, ttynum, stdinfd, stdoutfd, stderrfd, escape); | |
469 | current_config = NULL; | |
470 | return ret; | |
b5159817 DE |
471 | } |
472 | ||
858377e4 | 473 | static pid_t do_lxcapi_init_pid(struct lxc_container *c) |
72d0e1cb | 474 | { |
72d0e1cb SG |
475 | if (!c) |
476 | return -1; | |
477 | ||
5cee8c50 | 478 | return lxc_cmd_get_init_pid(c->name, c->config_path); |
72d0e1cb SG |
479 | } |
480 | ||
858377e4 SH |
481 | WRAP_API(pid_t, lxcapi_init_pid) |
482 | ||
12a50cc6 | 483 | static bool load_config_locked(struct lxc_container *c, const char *fname) |
8eb5694b SH |
484 | { |
485 | if (!c->lxc_conf) | |
486 | c->lxc_conf = lxc_conf_init(); | |
6b0d5538 SH |
487 | if (!c->lxc_conf) |
488 | return false; | |
d08779d4 SH |
489 | if (lxc_config_read(fname, c->lxc_conf, false) != 0) |
490 | return false; | |
d08779d4 | 491 | return true; |
8eb5694b SH |
492 | } |
493 | ||
858377e4 | 494 | static bool do_lxcapi_load_config(struct lxc_container *c, const char *alt_file) |
72d0e1cb | 495 | { |
39dc698c SH |
496 | bool ret = false, need_disklock = false; |
497 | int lret; | |
12a50cc6 | 498 | const char *fname; |
72d0e1cb SG |
499 | if (!c) |
500 | return false; | |
501 | ||
502 | fname = c->configfile; | |
503 | if (alt_file) | |
504 | fname = alt_file; | |
505 | if (!fname) | |
506 | return false; | |
39dc698c SH |
507 | /* |
508 | * If we're reading something other than the container's config, | |
509 | * we only need to lock the in-memory container. If loading the | |
510 | * container's config file, take the disk lock. | |
511 | */ | |
512 | if (strcmp(fname, c->configfile) == 0) | |
513 | need_disklock = true; | |
514 | ||
515 | if (need_disklock) | |
516 | lret = container_disk_lock(c); | |
517 | else | |
518 | lret = container_mem_lock(c); | |
519 | if (lret) | |
72d0e1cb | 520 | return false; |
39dc698c | 521 | |
8eb5694b | 522 | ret = load_config_locked(c, fname); |
39dc698c SH |
523 | |
524 | if (need_disklock) | |
525 | container_disk_unlock(c); | |
526 | else | |
527 | container_mem_unlock(c); | |
72d0e1cb SG |
528 | return ret; |
529 | } | |
530 | ||
858377e4 SH |
531 | WRAP_API_1(bool, lxcapi_load_config, const char *) |
532 | ||
533 | static bool do_lxcapi_want_daemonize(struct lxc_container *c, bool state) | |
72d0e1cb | 534 | { |
497a2995 | 535 | if (!c || !c->lxc_conf) |
540f932a | 536 | return false; |
f02abefe | 537 | if (container_mem_lock(c)) { |
3bc449ed | 538 | ERROR("Error getting mem lock"); |
540f932a | 539 | return false; |
3bc449ed | 540 | } |
a2739df5 | 541 | c->daemonize = state; |
3bc449ed | 542 | container_mem_unlock(c); |
540f932a | 543 | return true; |
72d0e1cb SG |
544 | } |
545 | ||
858377e4 SH |
546 | WRAP_API_1(bool, lxcapi_want_daemonize, bool) |
547 | ||
548 | static bool do_lxcapi_want_close_all_fds(struct lxc_container *c, bool state) | |
130a1888 ÇO |
549 | { |
550 | if (!c || !c->lxc_conf) | |
49badbbe | 551 | return false; |
130a1888 ÇO |
552 | if (container_mem_lock(c)) { |
553 | ERROR("Error getting mem lock"); | |
49badbbe | 554 | return false; |
130a1888 | 555 | } |
540f932a | 556 | c->lxc_conf->close_all_fds = state; |
130a1888 | 557 | container_mem_unlock(c); |
49badbbe | 558 | return true; |
130a1888 ÇO |
559 | } |
560 | ||
858377e4 SH |
561 | WRAP_API_1(bool, lxcapi_want_close_all_fds, bool) |
562 | ||
563 | static bool do_lxcapi_wait(struct lxc_container *c, const char *state, int timeout) | |
7a44c8b4 SG |
564 | { |
565 | int ret; | |
566 | ||
567 | if (!c) | |
568 | return false; | |
569 | ||
67e571de | 570 | ret = lxc_wait(c->name, state, timeout, c->config_path); |
7a44c8b4 SG |
571 | return ret == 0; |
572 | } | |
573 | ||
858377e4 | 574 | WRAP_API_2(bool, lxcapi_wait, const char *, int) |
7a44c8b4 | 575 | |
858377e4 | 576 | static bool do_wait_on_daemonized_start(struct lxc_container *c, int pid) |
7a44c8b4 SG |
577 | { |
578 | /* we'll probably want to make this timeout configurable? */ | |
697fa639 | 579 | int timeout = 5, ret, status; |
7a44c8b4 | 580 | |
697fa639 SH |
581 | /* |
582 | * our child is going to fork again, then exit. reap the | |
583 | * child | |
584 | */ | |
03f064ff | 585 | ret = waitpid(pid, &status, 0); |
697fa639 SH |
586 | if (ret == -1 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) |
587 | DEBUG("failed waiting for first dual-fork child"); | |
858377e4 | 588 | return do_lxcapi_wait(c, "RUNNING", timeout); |
7a44c8b4 SG |
589 | } |
590 | ||
858377e4 SH |
591 | WRAP_API_1(bool, wait_on_daemonized_start, int) |
592 | ||
2d834aa8 SH |
593 | static bool am_single_threaded(void) |
594 | { | |
595 | struct dirent dirent, *direntp; | |
596 | DIR *dir; | |
597 | int count=0; | |
598 | ||
2d834aa8 | 599 | dir = opendir("/proc/self/task"); |
2d834aa8 SH |
600 | if (!dir) { |
601 | INFO("failed to open /proc/self/task"); | |
602 | return false; | |
603 | } | |
604 | ||
605 | while (!readdir_r(dir, &dirent, &direntp)) { | |
606 | if (!direntp) | |
607 | break; | |
608 | ||
609 | if (!strcmp(direntp->d_name, ".")) | |
610 | continue; | |
611 | ||
612 | if (!strcmp(direntp->d_name, "..")) | |
613 | continue; | |
614 | if (++count > 1) | |
615 | break; | |
616 | } | |
2d834aa8 | 617 | closedir(dir); |
2d834aa8 SH |
618 | return count == 1; |
619 | } | |
620 | ||
fd51a89b SH |
621 | static void push_arg(char ***argp, char *arg, int *nargs) |
622 | { | |
623 | char **argv; | |
624 | char *copy; | |
625 | ||
626 | do { | |
627 | copy = strdup(arg); | |
628 | } while (!copy); | |
629 | do { | |
630 | argv = realloc(*argp, (*nargs + 2) * sizeof(char *)); | |
631 | } while (!argv); | |
632 | *argp = argv; | |
633 | argv[*nargs] = copy; | |
634 | (*nargs)++; | |
635 | argv[*nargs] = NULL; | |
636 | } | |
637 | ||
638 | static char **split_init_cmd(const char *incmd) | |
639 | { | |
640 | size_t len; | |
641 | int nargs = 0; | |
642 | char *copy, *p, *saveptr; | |
643 | char **argv; | |
644 | ||
645 | if (!incmd) | |
646 | return NULL; | |
647 | ||
648 | len = strlen(incmd) + 1; | |
649 | copy = alloca(len); | |
650 | strncpy(copy, incmd, len); | |
651 | copy[len-1] = '\0'; | |
652 | ||
653 | do { | |
654 | argv = malloc(sizeof(char *)); | |
655 | } while (!argv); | |
656 | argv[0] = NULL; | |
657 | for (p = strtok_r(copy, " ", &saveptr); p != NULL; | |
658 | p = strtok_r(NULL, " ", &saveptr)) | |
659 | push_arg(&argv, p, &nargs); | |
660 | ||
661 | if (nargs == 0) { | |
662 | free(argv); | |
663 | return NULL; | |
664 | } | |
665 | return argv; | |
666 | } | |
667 | ||
668 | static void free_init_cmd(char **argv) | |
669 | { | |
670 | int i = 0; | |
671 | ||
672 | if (!argv) | |
673 | return; | |
674 | while (argv[i]) | |
675 | free(argv[i++]); | |
676 | free(argv); | |
677 | } | |
678 | ||
858377e4 | 679 | static bool do_lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
72d0e1cb SG |
680 | { |
681 | int ret; | |
682 | struct lxc_conf *conf; | |
540f932a | 683 | bool daemonize = false; |
6eaac303 | 684 | FILE *pid_fp = NULL; |
72d0e1cb SG |
685 | char *default_args[] = { |
686 | "/sbin/init", | |
13aad0ae | 687 | NULL, |
72d0e1cb | 688 | }; |
fd51a89b | 689 | char **init_cmd = NULL; |
72d0e1cb SG |
690 | |
691 | /* container exists */ | |
692 | if (!c) | |
693 | return false; | |
120146b9 SG |
694 | |
695 | /* If anything fails before we set error_num, we want an error in there */ | |
696 | c->error_num = 1; | |
697 | ||
72d0e1cb SG |
698 | /* container has been setup */ |
699 | if (!c->lxc_conf) | |
700 | return false; | |
701 | ||
3e625e2d SH |
702 | if ((ret = ongoing_create(c)) < 0) { |
703 | ERROR("Error checking for incomplete creation"); | |
704 | return false; | |
705 | } | |
706 | if (ret == 2) { | |
707 | ERROR("Error: %s creation was not completed", c->name); | |
858377e4 | 708 | do_lxcapi_destroy(c); |
3e625e2d SH |
709 | return false; |
710 | } else if (ret == 1) { | |
711 | ERROR("Error: creation of %s is ongoing", c->name); | |
712 | return false; | |
713 | } | |
714 | ||
72d0e1cb SG |
715 | /* is this app meant to be run through lxcinit, as in lxc-execute? */ |
716 | if (useinit && !argv) | |
717 | return false; | |
718 | ||
5cee8c50 | 719 | if (container_mem_lock(c)) |
72d0e1cb SG |
720 | return false; |
721 | conf = c->lxc_conf; | |
722 | daemonize = c->daemonize; | |
5cee8c50 | 723 | container_mem_unlock(c); |
72d0e1cb SG |
724 | |
725 | if (useinit) { | |
507cee36 | 726 | ret = lxc_execute(c->name, argv, 1, conf, c->config_path, daemonize); |
72d0e1cb SG |
727 | return ret == 0 ? true : false; |
728 | } | |
729 | ||
fd51a89b SH |
730 | /* if no argv was passed in, use lxc.init_cmd if provided in |
731 | * configuration */ | |
732 | if (!argv) | |
733 | argv = init_cmd = split_init_cmd(conf->init_cmd); | |
734 | ||
735 | /* ... and otherwise use default_args */ | |
736 | if (!argv) | |
737 | argv = default_args; | |
72d0e1cb SG |
738 | |
739 | /* | |
740 | * say, I'm not sure - what locks do we want here? Any? | |
741 | * Is liblxc's locking enough here to protect the on disk | |
742 | * container? We don't want to exclude things like lxc_info | |
743 | * while container is running... | |
744 | */ | |
745 | if (daemonize) { | |
0a4be28d | 746 | char title[2048]; |
e51d4895 | 747 | lxc_monitord_spawn(c->config_path); |
71454076 | 748 | |
72d0e1cb | 749 | pid_t pid = fork(); |
844f7a38 | 750 | if (pid < 0) |
72d0e1cb | 751 | return false; |
6eaac303 QH |
752 | |
753 | if (pid != 0) { | |
754 | /* Set to NULL because we don't want father unlink | |
755 | * the PID file, child will do the free and unlink. | |
756 | */ | |
757 | c->pidfile = NULL; | |
03f064ff | 758 | return wait_on_daemonized_start(c, pid); |
6eaac303 | 759 | } |
025ed0f3 | 760 | |
0a4be28d TA |
761 | /* We don't really care if this doesn't print all the |
762 | * characters; all that it means is that the proctitle will be | |
763 | * ugly. Similarly, we also don't care if setproctitle() | |
764 | * fails. */ | |
765 | snprintf(title, sizeof(title), "[lxc monitor] %s %s", c->config_path, c->name); | |
766 | INFO("Attempting to set proc title to %s", title); | |
767 | setproctitle(title); | |
768 | ||
697fa639 SH |
769 | /* second fork to be reparented by init */ |
770 | pid = fork(); | |
771 | if (pid < 0) { | |
772 | SYSERROR("Error doing dual-fork"); | |
13353dc4 | 773 | exit(1); |
697fa639 SH |
774 | } |
775 | if (pid != 0) | |
776 | exit(0); | |
72d0e1cb | 777 | /* like daemon(), chdir to / and redirect 0,1,2 to /dev/null */ |
c278cef2 SH |
778 | if (chdir("/")) { |
779 | SYSERROR("Error chdir()ing to /."); | |
13353dc4 | 780 | exit(1); |
c278cef2 | 781 | } |
d2cf4c37 | 782 | lxc_check_inherited(conf, true, -1); |
69aeabac TA |
783 | if (null_stdfds() < 0) { |
784 | ERROR("failed to close fds"); | |
13353dc4 | 785 | exit(1); |
69aeabac | 786 | } |
72d0e1cb | 787 | setsid(); |
2d834aa8 SH |
788 | } else { |
789 | if (!am_single_threaded()) { | |
790 | ERROR("Cannot start non-daemonized container when threaded"); | |
791 | return false; | |
792 | } | |
72d0e1cb SG |
793 | } |
794 | ||
6eaac303 QH |
795 | /* We need to write PID file after daeminize, so we always |
796 | * write the right PID. | |
797 | */ | |
798 | if (c->pidfile) { | |
799 | pid_fp = fopen(c->pidfile, "w"); | |
800 | if (pid_fp == NULL) { | |
801 | SYSERROR("Failed to create pidfile '%s' for '%s'", | |
802 | c->pidfile, c->name); | |
13353dc4 SH |
803 | if (daemonize) |
804 | exit(1); | |
6eaac303 QH |
805 | return false; |
806 | } | |
807 | ||
808 | if (fprintf(pid_fp, "%d\n", getpid()) < 0) { | |
809 | SYSERROR("Failed to write '%s'", c->pidfile); | |
810 | fclose(pid_fp); | |
811 | pid_fp = NULL; | |
13353dc4 SH |
812 | if (daemonize) |
813 | exit(1); | |
6eaac303 QH |
814 | return false; |
815 | } | |
816 | ||
817 | fclose(pid_fp); | |
818 | pid_fp = NULL; | |
819 | } | |
820 | ||
72d0e1cb | 821 | conf->reboot = 0; |
d2cf4c37 | 822 | |
a8dfe4e0 WB |
823 | /* Unshare the mount namespace if requested */ |
824 | if (conf->monitor_unshare) { | |
825 | if (unshare(CLONE_NEWNS)) { | |
826 | SYSERROR("failed to unshare mount namespace"); | |
827 | return false; | |
828 | } | |
829 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
830 | SYSERROR("Failed to make / rslave at startup"); | |
831 | return false; | |
832 | } | |
833 | } | |
834 | ||
8bee8851 | 835 | reboot: |
d2cf4c37 SH |
836 | if (lxc_check_inherited(conf, daemonize, -1)) { |
837 | ERROR("Inherited fds found"); | |
838 | ret = 1; | |
839 | goto out; | |
840 | } | |
841 | ||
507cee36 | 842 | ret = lxc_start(c->name, argv, conf, c->config_path, daemonize); |
d4ef230c | 843 | c->error_num = ret; |
72d0e1cb | 844 | |
8bee8851 | 845 | if (conf->reboot == 1) { |
72d0e1cb | 846 | INFO("container requested reboot"); |
8bee8851 | 847 | conf->reboot = 2; |
72d0e1cb SG |
848 | goto reboot; |
849 | } | |
850 | ||
d2cf4c37 | 851 | out: |
487d8008 QH |
852 | if (c->pidfile) { |
853 | unlink(c->pidfile); | |
854 | free(c->pidfile); | |
855 | c->pidfile = NULL; | |
856 | } | |
857 | ||
fd51a89b SH |
858 | free_init_cmd(init_cmd); |
859 | ||
844f7a38 | 860 | if (daemonize) |
05e5d7dc | 861 | exit (ret == 0 ? true : false); |
844f7a38 | 862 | else |
05e5d7dc | 863 | return (ret == 0 ? true : false); |
72d0e1cb SG |
864 | } |
865 | ||
858377e4 SH |
866 | static bool lxcapi_start(struct lxc_container *c, int useinit, char * const argv[]) |
867 | { | |
868 | bool ret; | |
869 | current_config = c ? c->lxc_conf : NULL; | |
870 | ret = do_lxcapi_start(c, useinit, argv); | |
871 | current_config = NULL; | |
872 | return ret; | |
873 | } | |
874 | ||
72d0e1cb SG |
875 | /* |
876 | * note there MUST be an ending NULL | |
877 | */ | |
878 | static bool lxcapi_startl(struct lxc_container *c, int useinit, ...) | |
879 | { | |
880 | va_list ap; | |
a0e93eeb | 881 | char **inargs = NULL; |
72d0e1cb SG |
882 | bool bret = false; |
883 | ||
884 | /* container exists */ | |
885 | if (!c) | |
886 | return false; | |
887 | ||
858377e4 SH |
888 | current_config = c->lxc_conf; |
889 | ||
72d0e1cb | 890 | va_start(ap, useinit); |
a0e93eeb | 891 | inargs = lxc_va_arg_list_to_argv(ap, 0, 1); |
72d0e1cb SG |
892 | va_end(ap); |
893 | ||
a0e93eeb CS |
894 | if (!inargs) { |
895 | ERROR("Memory allocation error."); | |
896 | goto out; | |
72d0e1cb SG |
897 | } |
898 | ||
a0e93eeb | 899 | /* pass NULL if no arguments were supplied */ |
858377e4 | 900 | bret = do_lxcapi_start(c, useinit, *inargs ? inargs : NULL); |
72d0e1cb SG |
901 | |
902 | out: | |
903 | if (inargs) { | |
4e03ae57 DE |
904 | char **arg; |
905 | for (arg = inargs; *arg; arg++) | |
906 | free(*arg); | |
72d0e1cb SG |
907 | free(inargs); |
908 | } | |
909 | ||
858377e4 | 910 | current_config = NULL; |
72d0e1cb SG |
911 | return bret; |
912 | } | |
913 | ||
858377e4 | 914 | static bool do_lxcapi_stop(struct lxc_container *c) |
72d0e1cb SG |
915 | { |
916 | int ret; | |
917 | ||
918 | if (!c) | |
919 | return false; | |
920 | ||
ef6e34ee | 921 | ret = lxc_cmd_stop(c->name, c->config_path); |
72d0e1cb | 922 | |
d775f21b | 923 | return ret == 0; |
72d0e1cb SG |
924 | } |
925 | ||
858377e4 SH |
926 | WRAP_API(bool, lxcapi_stop) |
927 | ||
d5752559 SH |
928 | static int do_create_container_dir(const char *path, struct lxc_conf *conf) |
929 | { | |
930 | int ret = -1, lasterr; | |
931 | char *p = alloca(strlen(path)+1); | |
932 | mode_t mask = umask(0002); | |
933 | ret = mkdir(path, 0770); | |
934 | lasterr = errno; | |
935 | umask(mask); | |
936 | errno = lasterr; | |
937 | if (ret) { | |
938 | if (errno == EEXIST) | |
939 | ret = 0; | |
940 | else { | |
941 | SYSERROR("failed to create container path %s", path); | |
942 | return -1; | |
943 | } | |
944 | } | |
945 | strcpy(p, path); | |
946 | if (!lxc_list_empty(&conf->id_map) && chown_mapped_root(p, conf) != 0) { | |
947 | ERROR("Failed to chown container dir"); | |
948 | ret = -1; | |
949 | } | |
950 | return ret; | |
951 | } | |
952 | ||
72d0e1cb SG |
953 | /* |
954 | * create the standard expected container dir | |
955 | */ | |
956 | static bool create_container_dir(struct lxc_container *c) | |
957 | { | |
958 | char *s; | |
959 | int len, ret; | |
960 | ||
2a59a681 | 961 | len = strlen(c->config_path) + strlen(c->name) + 2; |
72d0e1cb SG |
962 | s = malloc(len); |
963 | if (!s) | |
964 | return false; | |
2a59a681 | 965 | ret = snprintf(s, len, "%s/%s", c->config_path, c->name); |
72d0e1cb SG |
966 | if (ret < 0 || ret >= len) { |
967 | free(s); | |
968 | return false; | |
969 | } | |
d5752559 | 970 | ret = do_create_container_dir(s, c->lxc_conf); |
72d0e1cb SG |
971 | free(s); |
972 | return ret == 0; | |
973 | } | |
974 | ||
975 | /* | |
1897e3bc SH |
976 | * do_bdev_create: thin wrapper around bdev_create(). Like bdev_create(), |
977 | * it returns a mounted bdev on success, NULL on error. | |
72d0e1cb | 978 | */ |
1897e3bc SH |
979 | static struct bdev *do_bdev_create(struct lxc_container *c, const char *type, |
980 | struct bdev_specs *specs) | |
981 | { | |
982 | char *dest; | |
1897e3bc SH |
983 | size_t len; |
984 | struct bdev *bdev; | |
985 | int ret; | |
986 | ||
cd219ae6 SY |
987 | /* rootfs.path or lxcpath/lxcname/rootfs */ |
988 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) == 0) { | |
cf465fe4 SH |
989 | const char *rpath = c->lxc_conf->rootfs.path; |
990 | len = strlen(rpath) + 1; | |
cd219ae6 | 991 | dest = alloca(len); |
cf465fe4 | 992 | ret = snprintf(dest, len, "%s", rpath); |
cd219ae6 | 993 | } else { |
858377e4 | 994 | const char *lxcpath = do_lxcapi_get_config_path(c); |
cd219ae6 SY |
995 | len = strlen(c->name) + strlen(lxcpath) + 9; |
996 | dest = alloca(len); | |
997 | ret = snprintf(dest, len, "%s/%s/rootfs", lxcpath, c->name); | |
998 | } | |
1897e3bc SH |
999 | if (ret < 0 || ret >= len) |
1000 | return NULL; | |
1001 | ||
1002 | bdev = bdev_create(dest, type, c->name, specs); | |
d44e88c2 | 1003 | if (!bdev) { |
959aee9c | 1004 | ERROR("Failed to create backing store type %s", type); |
1897e3bc | 1005 | return NULL; |
d44e88c2 SH |
1006 | } |
1007 | ||
858377e4 | 1008 | do_lxcapi_set_config_item(c, "lxc.rootfs", bdev->src); |
cf3ef16d SH |
1009 | |
1010 | /* if we are not root, chown the rootfs dir to root in the | |
1011 | * target uidmap */ | |
1012 | ||
0e6e3a41 | 1013 | if (geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) { |
c4d10a05 | 1014 | if (chown_mapped_root(bdev->dest, c->lxc_conf) < 0) { |
959aee9c | 1015 | ERROR("Error chowning %s to container root", bdev->dest); |
97e9cfa0 | 1016 | suggest_default_idmap(); |
cf3ef16d SH |
1017 | bdev_put(bdev); |
1018 | return NULL; | |
1019 | } | |
1020 | } | |
1021 | ||
1897e3bc SH |
1022 | return bdev; |
1023 | } | |
1024 | ||
96b3cb40 | 1025 | static char *lxcbasename(char *path) |
72d0e1cb | 1026 | { |
96b3cb40 SH |
1027 | char *p = path + strlen(path) - 1; |
1028 | while (*p != '/' && p > path) | |
1029 | p--; | |
1030 | return p; | |
1031 | } | |
72d0e1cb | 1032 | |
69aeabac | 1033 | static bool create_run_template(struct lxc_container *c, char *tpath, bool need_null_stdfds, |
96b3cb40 SH |
1034 | char *const argv[]) |
1035 | { | |
1036 | pid_t pid; | |
72d0e1cb | 1037 | |
72d0e1cb | 1038 | if (!tpath) |
96b3cb40 | 1039 | return true; |
72d0e1cb SG |
1040 | |
1041 | pid = fork(); | |
1042 | if (pid < 0) { | |
959aee9c | 1043 | SYSERROR("failed to fork task for container creation template"); |
96b3cb40 | 1044 | return false; |
72d0e1cb SG |
1045 | } |
1046 | ||
1047 | if (pid == 0) { // child | |
1897e3bc SH |
1048 | char *patharg, *namearg, *rootfsarg, *src; |
1049 | struct bdev *bdev = NULL; | |
72d0e1cb | 1050 | int i; |
96b3cb40 SH |
1051 | int ret, len, nargs = 0; |
1052 | char **newargv; | |
cf3ef16d | 1053 | struct lxc_conf *conf = c->lxc_conf; |
72d0e1cb | 1054 | |
69aeabac TA |
1055 | if (need_null_stdfds && null_stdfds() < 0) { |
1056 | exit(1); | |
dc23c1c8 | 1057 | } |
1897e3bc SH |
1058 | |
1059 | src = c->lxc_conf->rootfs.path; | |
1060 | /* | |
1f92162d | 1061 | * for an overlay create, what the user wants is the template to fill |
1897e3bc SH |
1062 | * in what will become the readonly lower layer. So don't mount for |
1063 | * the template | |
1064 | */ | |
1f92162d SG |
1065 | if (strncmp(src, "overlayfs:", 10) == 0) |
1066 | src = overlay_getlower(src+10); | |
1067 | if (strncmp(src, "aufs:", 5) == 0) | |
1068 | src = overlay_getlower(src+5); | |
1069 | ||
76a26f55 | 1070 | bdev = bdev_init(c->lxc_conf, src, c->lxc_conf->rootfs.mount, NULL); |
1897e3bc SH |
1071 | if (!bdev) { |
1072 | ERROR("Error opening rootfs"); | |
1073 | exit(1); | |
1074 | } | |
1075 | ||
4de2791f | 1076 | if (geteuid() == 0) { |
cf3ef16d SH |
1077 | if (unshare(CLONE_NEWNS) < 0) { |
1078 | ERROR("error unsharing mounts"); | |
1079 | exit(1); | |
1080 | } | |
4de2791f | 1081 | if (detect_shared_rootfs()) { |
c597baa8 | 1082 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { |
4de2791f SH |
1083 | SYSERROR("Failed to make / rslave to run template"); |
1084 | ERROR("Continuing..."); | |
1085 | } | |
1086 | } | |
1087 | } | |
2659c7cb | 1088 | if (strcmp(bdev->type, "dir") && strcmp(bdev->type, "btrfs")) { |
4de2791f | 1089 | if (geteuid() != 0) { |
2659c7cb | 1090 | ERROR("non-root users can only create btrfs and directory-backed containers"); |
4de2791f SH |
1091 | exit(1); |
1092 | } | |
cf3ef16d SH |
1093 | if (bdev->ops->mount(bdev) < 0) { |
1094 | ERROR("Error mounting rootfs"); | |
1095 | exit(1); | |
1096 | } | |
1097 | } else { // TODO come up with a better way here! | |
f10fad2f | 1098 | free(bdev->dest); |
cf3ef16d | 1099 | bdev->dest = strdup(bdev->src); |
1897e3bc SH |
1100 | } |
1101 | ||
72d0e1cb SG |
1102 | /* |
1103 | * create our new array, pre-pend the template name and | |
1104 | * base args | |
1105 | */ | |
1106 | if (argv) | |
1897e3bc | 1107 | for (nargs = 0; argv[nargs]; nargs++) ; |
6849cb5b | 1108 | nargs += 4; // template, path, rootfs and name args |
cf3ef16d | 1109 | |
72d0e1cb SG |
1110 | newargv = malloc(nargs * sizeof(*newargv)); |
1111 | if (!newargv) | |
1112 | exit(1); | |
96b3cb40 | 1113 | newargv[0] = lxcbasename(tpath); |
72d0e1cb | 1114 | |
2a59a681 | 1115 | len = strlen(c->config_path) + strlen(c->name) + strlen("--path=") + 2; |
72d0e1cb SG |
1116 | patharg = malloc(len); |
1117 | if (!patharg) | |
1118 | exit(1); | |
2a59a681 | 1119 | ret = snprintf(patharg, len, "--path=%s/%s", c->config_path, c->name); |
72d0e1cb SG |
1120 | if (ret < 0 || ret >= len) |
1121 | exit(1); | |
1122 | newargv[1] = patharg; | |
1123 | len = strlen("--name=") + strlen(c->name) + 1; | |
1124 | namearg = malloc(len); | |
1125 | if (!namearg) | |
1126 | exit(1); | |
1127 | ret = snprintf(namearg, len, "--name=%s", c->name); | |
1128 | if (ret < 0 || ret >= len) | |
1129 | exit(1); | |
1130 | newargv[2] = namearg; | |
1131 | ||
1897e3bc SH |
1132 | len = strlen("--rootfs=") + 1 + strlen(bdev->dest); |
1133 | rootfsarg = malloc(len); | |
1134 | if (!rootfsarg) | |
1135 | exit(1); | |
1136 | ret = snprintf(rootfsarg, len, "--rootfs=%s", bdev->dest); | |
1137 | if (ret < 0 || ret >= len) | |
1138 | exit(1); | |
1139 | newargv[3] = rootfsarg; | |
1140 | ||
72d0e1cb SG |
1141 | /* add passed-in args */ |
1142 | if (argv) | |
1897e3bc SH |
1143 | for (i = 4; i < nargs; i++) |
1144 | newargv[i] = argv[i-4]; | |
72d0e1cb SG |
1145 | |
1146 | /* add trailing NULL */ | |
1147 | nargs++; | |
1148 | newargv = realloc(newargv, nargs * sizeof(*newargv)); | |
1149 | if (!newargv) | |
1150 | exit(1); | |
1151 | newargv[nargs - 1] = NULL; | |
1152 | ||
cf3ef16d SH |
1153 | /* |
1154 | * If we're running the template in a mapped userns, then | |
1155 | * we prepend the template command with: | |
1156 | * lxc-usernsexec <-m map1> ... <-m mapn> -- | |
57d116ab SH |
1157 | * and we append "--mapped-uid x", where x is the mapped uid |
1158 | * for our geteuid() | |
cf3ef16d | 1159 | */ |
0e6e3a41 | 1160 | if (!lxc_list_empty(&conf->id_map)) { |
cf3ef16d | 1161 | int n2args = 1; |
57d116ab | 1162 | char txtuid[20]; |
2133f58c | 1163 | char txtgid[20]; |
cf3ef16d SH |
1164 | char **n2 = malloc(n2args * sizeof(*n2)); |
1165 | struct lxc_list *it; | |
1166 | struct id_map *map; | |
1167 | ||
57d116ab SH |
1168 | if (!n2) { |
1169 | SYSERROR("out of memory"); | |
1170 | exit(1); | |
1171 | } | |
cf3ef16d SH |
1172 | newargv[0] = tpath; |
1173 | tpath = "lxc-usernsexec"; | |
1174 | n2[0] = "lxc-usernsexec"; | |
1175 | lxc_list_for_each(it, &conf->id_map) { | |
1176 | map = it->elem; | |
1177 | n2args += 2; | |
57d116ab | 1178 | n2 = realloc(n2, n2args * sizeof(char *)); |
cf3ef16d SH |
1179 | if (!n2) |
1180 | exit(1); | |
1181 | n2[n2args-2] = "-m"; | |
1182 | n2[n2args-1] = malloc(200); | |
1183 | if (!n2[n2args-1]) | |
1184 | exit(1); | |
1185 | ret = snprintf(n2[n2args-1], 200, "%c:%lu:%lu:%lu", | |
1186 | map->idtype == ID_TYPE_UID ? 'u' : 'g', | |
1187 | map->nsid, map->hostid, map->range); | |
1188 | if (ret < 0 || ret >= 200) | |
1189 | exit(1); | |
1190 | } | |
2133f58c | 1191 | int hostid_mapped = mapped_hostid(geteuid(), conf, ID_TYPE_UID); |
6849cb5b | 1192 | int extraargs = hostid_mapped >= 0 ? 1 : 3; |
57d116ab | 1193 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); |
cf3ef16d SH |
1194 | if (!n2) |
1195 | exit(1); | |
57d116ab | 1196 | if (hostid_mapped < 0) { |
2133f58c | 1197 | hostid_mapped = find_unmapped_nsuid(conf, ID_TYPE_UID); |
cf3ef16d | 1198 | n2[n2args++] = "-m"; |
57d116ab | 1199 | if (hostid_mapped < 0) { |
cf3ef16d SH |
1200 | ERROR("Could not find free uid to map"); |
1201 | exit(1); | |
1202 | } | |
1203 | n2[n2args++] = malloc(200); | |
1204 | if (!n2[n2args-1]) { | |
1205 | SYSERROR("out of memory"); | |
1206 | exit(1); | |
1207 | } | |
1208 | ret = snprintf(n2[n2args-1], 200, "u:%d:%d:1", | |
57d116ab | 1209 | hostid_mapped, geteuid()); |
cf3ef16d SH |
1210 | if (ret < 0 || ret >= 200) { |
1211 | ERROR("string too long"); | |
1212 | exit(1); | |
1213 | } | |
1214 | } | |
2133f58c SH |
1215 | int hostgid_mapped = mapped_hostid(getegid(), conf, ID_TYPE_GID); |
1216 | extraargs = hostgid_mapped >= 0 ? 1 : 3; | |
1217 | n2 = realloc(n2, (nargs + n2args + extraargs) * sizeof(char *)); | |
1218 | if (!n2) | |
1219 | exit(1); | |
1220 | if (hostgid_mapped < 0) { | |
1221 | hostgid_mapped = find_unmapped_nsuid(conf, ID_TYPE_GID); | |
1222 | n2[n2args++] = "-m"; | |
1223 | if (hostgid_mapped < 0) { | |
1224 | ERROR("Could not find free uid to map"); | |
1225 | exit(1); | |
1226 | } | |
1227 | n2[n2args++] = malloc(200); | |
1228 | if (!n2[n2args-1]) { | |
1229 | SYSERROR("out of memory"); | |
1230 | exit(1); | |
1231 | } | |
1232 | ret = snprintf(n2[n2args-1], 200, "g:%d:%d:1", | |
1233 | hostgid_mapped, getegid()); | |
1234 | if (ret < 0 || ret >= 200) { | |
1235 | ERROR("string too long"); | |
1236 | exit(1); | |
1237 | } | |
1238 | } | |
cf3ef16d SH |
1239 | n2[n2args++] = "--"; |
1240 | for (i = 0; i < nargs; i++) | |
1241 | n2[i + n2args] = newargv[i]; | |
57d116ab SH |
1242 | n2args += nargs; |
1243 | // Finally add "--mapped-uid $uid" to tell template what to chown | |
1244 | // cached images to | |
2133f58c | 1245 | n2args += 4; |
57d116ab SH |
1246 | n2 = realloc(n2, n2args * sizeof(char *)); |
1247 | if (!n2) { | |
1248 | SYSERROR("out of memory"); | |
1249 | exit(1); | |
1250 | } | |
1251 | // note n2[n2args-1] is NULL | |
2133f58c | 1252 | n2[n2args-5] = "--mapped-uid"; |
57d116ab | 1253 | snprintf(txtuid, 20, "%d", hostid_mapped); |
2133f58c SH |
1254 | n2[n2args-4] = txtuid; |
1255 | n2[n2args-3] = "--mapped-gid"; | |
1256 | snprintf(txtgid, 20, "%d", hostgid_mapped); | |
1257 | n2[n2args-2] = txtgid; | |
57d116ab | 1258 | n2[n2args-1] = NULL; |
cf3ef16d SH |
1259 | free(newargv); |
1260 | newargv = n2; | |
1261 | } | |
72d0e1cb | 1262 | /* execute */ |
cf3ef16d | 1263 | execvp(tpath, newargv); |
72d0e1cb SG |
1264 | SYSERROR("failed to execute template %s", tpath); |
1265 | exit(1); | |
1266 | } | |
1267 | ||
9be53773 | 1268 | if (wait_for_pid(pid) != 0) { |
959aee9c | 1269 | ERROR("container creation template for %s failed", c->name); |
96b3cb40 SH |
1270 | return false; |
1271 | } | |
1272 | ||
1273 | return true; | |
1274 | } | |
1275 | ||
74a3920a | 1276 | static bool prepend_lxc_header(char *path, const char *t, char *const argv[]) |
3ce74686 | 1277 | { |
1fd9bd50 | 1278 | long flen; |
b4569e93 | 1279 | char *contents; |
3ce74686 | 1280 | FILE *f; |
025ed0f3 | 1281 | int ret = -1; |
52026772 | 1282 | #if HAVE_LIBGNUTLS |
025ed0f3 | 1283 | int i; |
3ce74686 | 1284 | unsigned char md_value[SHA_DIGEST_LENGTH]; |
b4569e93 | 1285 | char *tpath; |
52026772 | 1286 | #endif |
3ce74686 | 1287 | |
025ed0f3 | 1288 | f = fopen(path, "r"); |
025ed0f3 | 1289 | if (f == NULL) |
3ce74686 | 1290 | return false; |
025ed0f3 SH |
1291 | |
1292 | if (fseek(f, 0, SEEK_END) < 0) | |
1293 | goto out_error; | |
1294 | if ((flen = ftell(f)) < 0) | |
1295 | goto out_error; | |
1296 | if (fseek(f, 0, SEEK_SET) < 0) | |
1297 | goto out_error; | |
1298 | if ((contents = malloc(flen + 1)) == NULL) | |
1299 | goto out_error; | |
1300 | if (fread(contents, 1, flen, f) != flen) | |
1301 | goto out_free_contents; | |
1302 | ||
3ce74686 | 1303 | contents[flen] = '\0'; |
025ed0f3 | 1304 | ret = fclose(f); |
025ed0f3 SH |
1305 | f = NULL; |
1306 | if (ret < 0) | |
1307 | goto out_free_contents; | |
3ce74686 | 1308 | |
b4569e93 | 1309 | #if HAVE_LIBGNUTLS |
01efd4d3 | 1310 | tpath = get_template_path(t); |
85db5535 | 1311 | if (!tpath) { |
959aee9c | 1312 | ERROR("bad template: %s", t); |
025ed0f3 | 1313 | goto out_free_contents; |
3ce74686 SH |
1314 | } |
1315 | ||
85db5535 DE |
1316 | ret = sha1sum_file(tpath, md_value); |
1317 | if (ret < 0) { | |
1318 | ERROR("Error getting sha1sum of %s", tpath); | |
3ce74686 | 1319 | free(tpath); |
85db5535 | 1320 | goto out_free_contents; |
3ce74686 | 1321 | } |
85db5535 | 1322 | free(tpath); |
3ce74686 SH |
1323 | #endif |
1324 | ||
025ed0f3 | 1325 | f = fopen(path, "w"); |
025ed0f3 | 1326 | if (f == NULL) { |
3ce74686 SH |
1327 | SYSERROR("reopening config for writing"); |
1328 | free(contents); | |
1329 | return false; | |
1330 | } | |
1331 | fprintf(f, "# Template used to create this container: %s\n", t); | |
1332 | if (argv) { | |
1333 | fprintf(f, "# Parameters passed to the template:"); | |
1334 | while (*argv) { | |
1335 | fprintf(f, " %s", *argv); | |
1336 | argv++; | |
1337 | } | |
1338 | fprintf(f, "\n"); | |
1339 | } | |
1340 | #if HAVE_LIBGNUTLS | |
56698177 SH |
1341 | fprintf(f, "# Template script checksum (SHA-1): "); |
1342 | for (i=0; i<SHA_DIGEST_LENGTH; i++) | |
1343 | fprintf(f, "%02x", md_value[i]); | |
1344 | fprintf(f, "\n"); | |
3ce74686 | 1345 | #endif |
0520c252 | 1346 | fprintf(f, "# For additional config options, please look at lxc.container.conf(5)\n"); |
3ce74686 SH |
1347 | if (fwrite(contents, 1, flen, f) != flen) { |
1348 | SYSERROR("Writing original contents"); | |
1349 | free(contents); | |
1350 | fclose(f); | |
1351 | return false; | |
1352 | } | |
025ed0f3 SH |
1353 | ret = 0; |
1354 | out_free_contents: | |
3ce74686 | 1355 | free(contents); |
025ed0f3 SH |
1356 | out_error: |
1357 | if (f) { | |
1358 | int newret; | |
025ed0f3 | 1359 | newret = fclose(f); |
025ed0f3 SH |
1360 | if (ret == 0) |
1361 | ret = newret; | |
1362 | } | |
1363 | if (ret < 0) { | |
1364 | SYSERROR("Error prepending header"); | |
3ce74686 SH |
1365 | return false; |
1366 | } | |
1367 | return true; | |
1368 | } | |
1369 | ||
4df7f012 SH |
1370 | static void lxcapi_clear_config(struct lxc_container *c) |
1371 | { | |
f979ac15 SH |
1372 | if (c) { |
1373 | if (c->lxc_conf) { | |
1374 | lxc_conf_free(c->lxc_conf); | |
1375 | c->lxc_conf = NULL; | |
1376 | } | |
4df7f012 SH |
1377 | } |
1378 | } | |
1379 | ||
858377e4 SH |
1380 | #define do_lxcapi_clear_config(c) lxcapi_clear_config(c) |
1381 | ||
96b3cb40 SH |
1382 | /* |
1383 | * lxcapi_create: | |
1384 | * create a container with the given parameters. | |
1385 | * @c: container to be created. It has the lxcpath, name, and a starting | |
1386 | * configuration already set | |
1387 | * @t: the template to execute to instantiate the root filesystem and | |
1388 | * adjust the configuration. | |
1389 | * @bdevtype: backing store type to use. If NULL, dir will be used. | |
1390 | * @specs: additional parameters for the backing store, i.e. LVM vg to | |
1391 | * use. | |
1392 | * | |
1393 | * @argv: the arguments to pass to the template, terminated by NULL. If no | |
1394 | * arguments, you can just pass NULL. | |
1395 | */ | |
858377e4 | 1396 | static bool do_lxcapi_create(struct lxc_container *c, const char *t, |
dc23c1c8 | 1397 | const char *bdevtype, struct bdev_specs *specs, int flags, |
96b3cb40 SH |
1398 | char *const argv[]) |
1399 | { | |
a69aad27 | 1400 | bool ret = false; |
96b3cb40 | 1401 | pid_t pid; |
85db5535 | 1402 | char *tpath = NULL; |
cbee8106 | 1403 | int partial_fd; |
96b3cb40 SH |
1404 | |
1405 | if (!c) | |
1406 | return false; | |
1407 | ||
85db5535 DE |
1408 | if (t) { |
1409 | tpath = get_template_path(t); | |
1410 | if (!tpath) { | |
959aee9c | 1411 | ERROR("bad template: %s", t); |
85db5535 DE |
1412 | goto out; |
1413 | } | |
96b3cb40 SH |
1414 | } |
1415 | ||
cf465fe4 SH |
1416 | /* |
1417 | * If a template is passed in, and the rootfs already is defined in | |
1418 | * the container config and exists, then * caller is trying to create | |
1419 | * an existing container. Return an error, but do NOT delete the | |
1420 | * container. | |
1421 | */ | |
858377e4 | 1422 | if (do_lxcapi_is_defined(c) && c->lxc_conf && c->lxc_conf->rootfs.path && |
cf465fe4 SH |
1423 | access(c->lxc_conf->rootfs.path, F_OK) == 0 && tpath) { |
1424 | ERROR("Container %s:%s already exists", c->config_path, c->name); | |
6c6892b5 | 1425 | goto free_tpath; |
cf465fe4 SH |
1426 | } |
1427 | ||
6c6892b5 | 1428 | if (!c->lxc_conf) { |
858377e4 | 1429 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
959aee9c | 1430 | ERROR("Error loading default configuration file %s", lxc_global_config_value("lxc.default_config")); |
6c6892b5 DE |
1431 | goto free_tpath; |
1432 | } | |
96b3cb40 SH |
1433 | } |
1434 | ||
6c6892b5 DE |
1435 | if (!create_container_dir(c)) |
1436 | goto free_tpath; | |
1437 | ||
0590e82c | 1438 | /* |
0590e82c SH |
1439 | * if both template and rootfs.path are set, template is setup as rootfs.path. |
1440 | * container is already created if we have a config and rootfs.path is accessible | |
1441 | */ | |
00370edd DW |
1442 | if (!c->lxc_conf->rootfs.path && !tpath) { |
1443 | /* no template passed in and rootfs does not exist */ | |
1444 | if (!c->save_config(c, NULL)) { | |
1445 | ERROR("failed to save starting configuration for %s\n", c->name); | |
1446 | goto out; | |
1447 | } | |
1448 | ret = true; | |
0590e82c | 1449 | goto out; |
00370edd | 1450 | } |
0590e82c SH |
1451 | if (c->lxc_conf->rootfs.path && access(c->lxc_conf->rootfs.path, F_OK) != 0) |
1452 | /* rootfs passed into configuration, but does not exist: error */ | |
1453 | goto out; | |
858377e4 | 1454 | if (do_lxcapi_is_defined(c) && c->lxc_conf->rootfs.path && !tpath) { |
0590e82c SH |
1455 | /* Rootfs already existed, user just wanted to save the |
1456 | * loaded configuration */ | |
0f4cdd77 DW |
1457 | if (!c->save_config(c, NULL)) |
1458 | ERROR("failed to save starting configuration for %s\n", c->name); | |
0590e82c SH |
1459 | ret = true; |
1460 | goto out; | |
a69aad27 | 1461 | } |
96b3cb40 SH |
1462 | |
1463 | /* Mark that this container is being created */ | |
1464 | if ((partial_fd = create_partial(c)) < 0) | |
1465 | goto out; | |
1466 | ||
1467 | /* no need to get disk lock bc we have the partial locked */ | |
1468 | ||
1469 | /* | |
1470 | * Create the backing store | |
1471 | * Note we can't do this in the same task as we use to execute the | |
1472 | * template because of the way zfs works. | |
1473 | * After you 'zfs create', zfs mounts the fs only in the initial | |
1474 | * namespace. | |
1475 | */ | |
1476 | pid = fork(); | |
1477 | if (pid < 0) { | |
959aee9c | 1478 | SYSERROR("failed to fork task for container creation template"); |
8eb5694b SH |
1479 | goto out_unlock; |
1480 | } | |
1481 | ||
96b3cb40 SH |
1482 | if (pid == 0) { // child |
1483 | struct bdev *bdev = NULL; | |
1484 | ||
1485 | if (!(bdev = do_bdev_create(c, bdevtype, specs))) { | |
1486 | ERROR("Error creating backing store type %s for %s", | |
1487 | bdevtype ? bdevtype : "(none)", c->name); | |
1488 | exit(1); | |
1489 | } | |
1490 | ||
1491 | /* save config file again to store the new rootfs location */ | |
858377e4 | 1492 | if (!do_lxcapi_save_config(c, NULL)) { |
959aee9c | 1493 | ERROR("failed to save starting configuration for %s", c->name); |
96b3cb40 SH |
1494 | // parent task won't see bdev in config so we delete it |
1495 | bdev->ops->umount(bdev); | |
1496 | bdev->ops->destroy(bdev); | |
1497 | exit(1); | |
1498 | } | |
1499 | exit(0); | |
1500 | } | |
1501 | if (wait_for_pid(pid) != 0) | |
a09295f8 | 1502 | goto out_unlock; |
96b3cb40 SH |
1503 | |
1504 | /* reload config to get the rootfs */ | |
a3b47c09 | 1505 | lxc_conf_free(c->lxc_conf); |
96b3cb40 SH |
1506 | c->lxc_conf = NULL; |
1507 | if (!load_config_locked(c, c->configfile)) | |
a09295f8 | 1508 | goto out_unlock; |
96b3cb40 | 1509 | |
dc23c1c8 | 1510 | if (!create_run_template(c, tpath, !!(flags & LXC_CREATE_QUIET), argv)) |
96b3cb40 SH |
1511 | goto out_unlock; |
1512 | ||
8eb5694b SH |
1513 | // now clear out the lxc_conf we have, reload from the created |
1514 | // container | |
858377e4 | 1515 | do_lxcapi_clear_config(c); |
3ce74686 | 1516 | |
9d65a487 KY |
1517 | if (t) { |
1518 | if (!prepend_lxc_header(c->configfile, tpath, argv)) { | |
1519 | ERROR("Error prepending header to configuration file"); | |
1520 | goto out_unlock; | |
1521 | } | |
3ce74686 | 1522 | } |
a69aad27 | 1523 | ret = load_config_locked(c, c->configfile); |
72d0e1cb SG |
1524 | |
1525 | out_unlock: | |
3e625e2d SH |
1526 | if (partial_fd >= 0) |
1527 | remove_partial(c, partial_fd); | |
72d0e1cb | 1528 | out: |
c55d4505 | 1529 | if (!ret) |
18aa217b | 1530 | container_destroy(c); |
6c6892b5 | 1531 | free_tpath: |
f10fad2f | 1532 | free(tpath); |
a69aad27 | 1533 | return ret; |
72d0e1cb SG |
1534 | } |
1535 | ||
858377e4 SH |
1536 | static bool lxcapi_create(struct lxc_container *c, const char *t, |
1537 | const char *bdevtype, struct bdev_specs *specs, int flags, | |
1538 | char *const argv[]) | |
1539 | { | |
1540 | bool ret; | |
1541 | current_config = c ? c->lxc_conf : NULL; | |
1542 | ret = do_lxcapi_create(c, t, bdevtype, specs, flags, argv); | |
1543 | current_config = NULL; | |
1544 | return ret; | |
1545 | } | |
1546 | ||
1547 | static bool do_lxcapi_reboot(struct lxc_container *c) | |
3e625e2d SH |
1548 | { |
1549 | pid_t pid; | |
dd267776 | 1550 | int rebootsignal = SIGINT; |
3e625e2d SH |
1551 | |
1552 | if (!c) | |
1553 | return false; | |
858377e4 | 1554 | if (!do_lxcapi_is_running(c)) |
3e625e2d | 1555 | return false; |
858377e4 | 1556 | pid = do_lxcapi_init_pid(c); |
3e625e2d SH |
1557 | if (pid <= 0) |
1558 | return false; | |
dd267776 BP |
1559 | if (c->lxc_conf && c->lxc_conf->rebootsignal) |
1560 | rebootsignal = c->lxc_conf->rebootsignal; | |
1561 | if (kill(pid, rebootsignal) < 0) | |
3e625e2d SH |
1562 | return false; |
1563 | return true; | |
1564 | ||
1565 | } | |
1566 | ||
858377e4 SH |
1567 | WRAP_API(bool, lxcapi_reboot) |
1568 | ||
1569 | static bool do_lxcapi_shutdown(struct lxc_container *c, int timeout) | |
72d0e1cb SG |
1570 | { |
1571 | bool retv; | |
1572 | pid_t pid; | |
f0f1d8c0 | 1573 | int haltsignal = SIGPWR; |
72d0e1cb SG |
1574 | |
1575 | if (!c) | |
1576 | return false; | |
1577 | ||
858377e4 | 1578 | if (!do_lxcapi_is_running(c)) |
72d0e1cb | 1579 | return true; |
858377e4 | 1580 | pid = do_lxcapi_init_pid(c); |
72d0e1cb SG |
1581 | if (pid <= 0) |
1582 | return true; | |
b0227444 | 1583 | if (c->lxc_conf && c->lxc_conf->haltsignal) |
f0f1d8c0 DE |
1584 | haltsignal = c->lxc_conf->haltsignal; |
1585 | kill(pid, haltsignal); | |
858377e4 | 1586 | retv = do_lxcapi_wait(c, "STOPPED", timeout); |
72d0e1cb SG |
1587 | return retv; |
1588 | } | |
1589 | ||
858377e4 SH |
1590 | WRAP_API_1(bool, lxcapi_shutdown, int) |
1591 | ||
1897e3bc | 1592 | static bool lxcapi_createl(struct lxc_container *c, const char *t, |
dc23c1c8 | 1593 | const char *bdevtype, struct bdev_specs *specs, int flags, ...) |
72d0e1cb SG |
1594 | { |
1595 | bool bret = false; | |
a0e93eeb | 1596 | char **args = NULL; |
72d0e1cb | 1597 | va_list ap; |
72d0e1cb SG |
1598 | |
1599 | if (!c) | |
1600 | return false; | |
1601 | ||
858377e4 SH |
1602 | current_config = c->lxc_conf; |
1603 | ||
72d0e1cb SG |
1604 | /* |
1605 | * since we're going to wait for create to finish, I don't think we | |
1606 | * need to get a copy of the arguments. | |
1607 | */ | |
dc23c1c8 | 1608 | va_start(ap, flags); |
a0e93eeb | 1609 | args = lxc_va_arg_list_to_argv(ap, 0, 0); |
72d0e1cb | 1610 | va_end(ap); |
a0e93eeb CS |
1611 | if (!args) { |
1612 | ERROR("Memory allocation error."); | |
1613 | goto out; | |
1614 | } | |
72d0e1cb | 1615 | |
858377e4 | 1616 | bret = do_lxcapi_create(c, t, bdevtype, specs, flags, args); |
72d0e1cb SG |
1617 | |
1618 | out: | |
a0e93eeb | 1619 | free(args); |
858377e4 | 1620 | current_config = NULL; |
72d0e1cb SG |
1621 | return bret; |
1622 | } | |
1623 | ||
6b0d5538 SH |
1624 | static void do_clear_unexp_config_line(struct lxc_conf *conf, const char *key) |
1625 | { | |
1626 | if (strcmp(key, "lxc.cgroup") == 0) | |
1627 | clear_unexp_config_line(conf, key, true); | |
1628 | else if (strcmp(key, "lxc.network") == 0) | |
1629 | clear_unexp_config_line(conf, key, true); | |
1630 | else if (strcmp(key, "lxc.hook") == 0) | |
1631 | clear_unexp_config_line(conf, key, true); | |
1632 | else | |
1633 | clear_unexp_config_line(conf, key, false); | |
1634 | if (!do_append_unexp_config_line(conf, key, "")) | |
1635 | WARN("Error clearing configuration for %s", key); | |
1636 | } | |
1637 | ||
858377e4 | 1638 | static bool do_lxcapi_clear_config_item(struct lxc_container *c, const char *key) |
72d0e1cb SG |
1639 | { |
1640 | int ret; | |
1641 | ||
1642 | if (!c || !c->lxc_conf) | |
1643 | return false; | |
5cee8c50 | 1644 | if (container_mem_lock(c)) |
72d0e1cb | 1645 | return false; |
72d0e1cb | 1646 | ret = lxc_clear_config_item(c->lxc_conf, key); |
6b0d5538 SH |
1647 | if (!ret) |
1648 | do_clear_unexp_config_line(c->lxc_conf, key); | |
5cee8c50 | 1649 | container_mem_unlock(c); |
72d0e1cb SG |
1650 | return ret == 0; |
1651 | } | |
1652 | ||
858377e4 SH |
1653 | WRAP_API_1(bool, lxcapi_clear_config_item, const char *) |
1654 | ||
e0f59189 | 1655 | static inline bool enter_net_ns(struct lxc_container *c) |
51d0854c | 1656 | { |
858377e4 | 1657 | pid_t pid = do_lxcapi_init_pid(c); |
ae22a220 | 1658 | |
0e6e3a41 | 1659 | if ((geteuid() != 0 || (c->lxc_conf && !lxc_list_empty(&c->lxc_conf->id_map))) && access("/proc/self/ns/user", F_OK) == 0) { |
51d0854c DY |
1660 | if (!switch_to_ns(pid, "user")) |
1661 | return false; | |
9c83a661 | 1662 | } |
51d0854c | 1663 | return switch_to_ns(pid, "net"); |
799f29ab ÇO |
1664 | } |
1665 | ||
9c88ff1f ÇO |
1666 | // used by qsort and bsearch functions for comparing names |
1667 | static inline int string_cmp(char **first, char **second) | |
1668 | { | |
1669 | return strcmp(*first, *second); | |
1670 | } | |
1671 | ||
1672 | // used by qsort and bsearch functions for comparing container names | |
1673 | static inline int container_cmp(struct lxc_container **first, struct lxc_container **second) | |
1674 | { | |
1675 | return strcmp((*first)->name, (*second)->name); | |
1676 | } | |
1677 | ||
1678 | static bool add_to_array(char ***names, char *cname, int pos) | |
1679 | { | |
1680 | char **newnames = realloc(*names, (pos+1) * sizeof(char *)); | |
1681 | if (!newnames) { | |
1682 | ERROR("Out of memory"); | |
1683 | return false; | |
1684 | } | |
1685 | ||
1686 | *names = newnames; | |
1687 | newnames[pos] = strdup(cname); | |
1688 | if (!newnames[pos]) | |
1689 | return false; | |
1690 | ||
1691 | // sort the arrray as we will use binary search on it | |
1692 | qsort(newnames, pos + 1, sizeof(char *), (int (*)(const void *,const void *))string_cmp); | |
1693 | ||
1694 | return true; | |
1695 | } | |
1696 | ||
2871830a | 1697 | static bool add_to_clist(struct lxc_container ***list, struct lxc_container *c, int pos, bool sort) |
9c88ff1f ÇO |
1698 | { |
1699 | struct lxc_container **newlist = realloc(*list, (pos+1) * sizeof(struct lxc_container *)); | |
1700 | if (!newlist) { | |
1701 | ERROR("Out of memory"); | |
1702 | return false; | |
1703 | } | |
1704 | ||
1705 | *list = newlist; | |
1706 | newlist[pos] = c; | |
1707 | ||
1708 | // sort the arrray as we will use binary search on it | |
2871830a DE |
1709 | if (sort) |
1710 | qsort(newlist, pos + 1, sizeof(struct lxc_container *), (int (*)(const void *,const void *))container_cmp); | |
9c88ff1f ÇO |
1711 | |
1712 | return true; | |
1713 | } | |
1714 | ||
1715 | static char** get_from_array(char ***names, char *cname, int size) | |
1716 | { | |
1717 | return (char **)bsearch(&cname, *names, size, sizeof(char *), (int (*)(const void *, const void *))string_cmp); | |
1718 | } | |
1719 | ||
1720 | ||
1721 | static bool array_contains(char ***names, char *cname, int size) { | |
1722 | if(get_from_array(names, cname, size) != NULL) | |
1723 | return true; | |
1724 | return false; | |
1725 | } | |
1726 | ||
1727 | static bool remove_from_array(char ***names, char *cname, int size) | |
1728 | { | |
1729 | char **result = get_from_array(names, cname, size); | |
1730 | if (result != NULL) { | |
1731 | free(result); | |
1732 | return true; | |
1733 | } | |
1734 | return false; | |
1735 | } | |
1736 | ||
858377e4 | 1737 | static char ** do_lxcapi_get_interfaces(struct lxc_container *c) |
799f29ab | 1738 | { |
ae22a220 ÇO |
1739 | pid_t pid; |
1740 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 1741 | char **interfaces = NULL; |
ae22a220 | 1742 | char interface[IFNAMSIZ]; |
799f29ab | 1743 | |
ae22a220 ÇO |
1744 | if(pipe(pipefd) < 0) { |
1745 | SYSERROR("pipe failed"); | |
1746 | return NULL; | |
c868b261 ÇO |
1747 | } |
1748 | ||
ae22a220 ÇO |
1749 | pid = fork(); |
1750 | if (pid < 0) { | |
959aee9c | 1751 | SYSERROR("failed to fork task to get interfaces information"); |
ae22a220 ÇO |
1752 | close(pipefd[0]); |
1753 | close(pipefd[1]); | |
1754 | return NULL; | |
1755 | } | |
799f29ab | 1756 | |
ae22a220 ÇO |
1757 | if (pid == 0) { // child |
1758 | int ret = 1, nbytes; | |
1759 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
1760 | ||
1761 | /* close the read-end of the pipe */ | |
1762 | close(pipefd[0]); | |
1763 | ||
e0f59189 | 1764 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
1765 | SYSERROR("failed to enter namespace"); |
1766 | goto out; | |
1767 | } | |
1768 | ||
1769 | /* Grab the list of interfaces */ | |
1770 | if (getifaddrs(&interfaceArray)) { | |
1771 | SYSERROR("failed to get interfaces list"); | |
1772 | goto out; | |
1773 | } | |
1774 | ||
1775 | /* Iterate through the interfaces */ | |
1776 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
1777 | nbytes = write(pipefd[1], tempIfAddr->ifa_name, IFNAMSIZ); | |
1778 | if (nbytes < 0) { | |
1779 | ERROR("write failed"); | |
1780 | goto out; | |
1781 | } | |
1782 | count++; | |
1783 | } | |
1784 | ret = 0; | |
1785 | ||
1786 | out: | |
1787 | if (interfaceArray) | |
1788 | freeifaddrs(interfaceArray); | |
1789 | ||
1790 | /* close the write-end of the pipe, thus sending EOF to the reader */ | |
1791 | close(pipefd[1]); | |
1792 | exit(ret); | |
799f29ab ÇO |
1793 | } |
1794 | ||
ae22a220 ÇO |
1795 | /* close the write-end of the pipe */ |
1796 | close(pipefd[1]); | |
1797 | ||
358afd84 | 1798 | while (read(pipefd[0], &interface, IFNAMSIZ) == IFNAMSIZ) { |
ae22a220 ÇO |
1799 | if (array_contains(&interfaces, interface, count)) |
1800 | continue; | |
799f29ab | 1801 | |
ae22a220 ÇO |
1802 | if(!add_to_array(&interfaces, interface, count)) |
1803 | ERROR("PARENT: add_to_array failed"); | |
9c88ff1f ÇO |
1804 | count++; |
1805 | } | |
799f29ab | 1806 | |
ae22a220 ÇO |
1807 | if (wait_for_pid(pid) != 0) { |
1808 | for(i=0;i<count;i++) | |
1809 | free(interfaces[i]); | |
1810 | free(interfaces); | |
1811 | interfaces = NULL; | |
1812 | } | |
9c88ff1f | 1813 | |
ae22a220 ÇO |
1814 | /* close the read-end of the pipe */ |
1815 | close(pipefd[0]); | |
799f29ab | 1816 | |
9c88ff1f ÇO |
1817 | /* Append NULL to the array */ |
1818 | if(interfaces) | |
1819 | interfaces = (char **)lxc_append_null_to_array((void **)interfaces, count); | |
799f29ab | 1820 | |
9c88ff1f | 1821 | return interfaces; |
799f29ab ÇO |
1822 | } |
1823 | ||
858377e4 SH |
1824 | WRAP_API(char **, lxcapi_get_interfaces) |
1825 | ||
1826 | static char** do_lxcapi_get_ips(struct lxc_container *c, const char* interface, const char* family, int scope) | |
799f29ab | 1827 | { |
ae22a220 ÇO |
1828 | pid_t pid; |
1829 | int i, count = 0, pipefd[2]; | |
9c88ff1f | 1830 | char **addresses = NULL; |
ae22a220 | 1831 | char address[INET6_ADDRSTRLEN]; |
799f29ab | 1832 | |
ae22a220 ÇO |
1833 | if(pipe(pipefd) < 0) { |
1834 | SYSERROR("pipe failed"); | |
1835 | return NULL; | |
c868b261 ÇO |
1836 | } |
1837 | ||
ae22a220 ÇO |
1838 | pid = fork(); |
1839 | if (pid < 0) { | |
959aee9c | 1840 | SYSERROR("failed to fork task to get container ips"); |
ae22a220 ÇO |
1841 | close(pipefd[0]); |
1842 | close(pipefd[1]); | |
1843 | return NULL; | |
9c83a661 SG |
1844 | } |
1845 | ||
ae22a220 ÇO |
1846 | if (pid == 0) { // child |
1847 | int ret = 1, nbytes; | |
1848 | struct ifaddrs *interfaceArray = NULL, *tempIfAddr = NULL; | |
1849 | char addressOutputBuffer[INET6_ADDRSTRLEN]; | |
1850 | void *tempAddrPtr = NULL; | |
1851 | char *address = NULL; | |
fe218ca3 | 1852 | |
ae22a220 ÇO |
1853 | /* close the read-end of the pipe */ |
1854 | close(pipefd[0]); | |
1855 | ||
e0f59189 | 1856 | if (!enter_net_ns(c)) { |
ae22a220 ÇO |
1857 | SYSERROR("failed to enter namespace"); |
1858 | goto out; | |
9c83a661 | 1859 | } |
ae22a220 ÇO |
1860 | |
1861 | /* Grab the list of interfaces */ | |
1862 | if (getifaddrs(&interfaceArray)) { | |
1863 | SYSERROR("failed to get interfaces list"); | |
1864 | goto out; | |
1865 | } | |
1866 | ||
1867 | /* Iterate through the interfaces */ | |
1868 | for (tempIfAddr = interfaceArray; tempIfAddr != NULL; tempIfAddr = tempIfAddr->ifa_next) { | |
1869 | if (tempIfAddr->ifa_addr == NULL) | |
9c83a661 SG |
1870 | continue; |
1871 | ||
ae22a220 ÇO |
1872 | if(tempIfAddr->ifa_addr->sa_family == AF_INET) { |
1873 | if (family && strcmp(family, "inet")) | |
1874 | continue; | |
1875 | tempAddrPtr = &((struct sockaddr_in *)tempIfAddr->ifa_addr)->sin_addr; | |
1876 | } | |
1877 | else { | |
1878 | if (family && strcmp(family, "inet6")) | |
1879 | continue; | |
1880 | ||
1881 | if (((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_scope_id != scope) | |
1882 | continue; | |
1883 | ||
1884 | tempAddrPtr = &((struct sockaddr_in6 *)tempIfAddr->ifa_addr)->sin6_addr; | |
1885 | } | |
1886 | ||
1887 | if (interface && strcmp(interface, tempIfAddr->ifa_name)) | |
1888 | continue; | |
1889 | else if (!interface && strcmp("lo", tempIfAddr->ifa_name) == 0) | |
9c83a661 SG |
1890 | continue; |
1891 | ||
ae22a220 ÇO |
1892 | address = (char *)inet_ntop(tempIfAddr->ifa_addr->sa_family, |
1893 | tempAddrPtr, | |
1894 | addressOutputBuffer, | |
1895 | sizeof(addressOutputBuffer)); | |
1896 | if (!address) | |
1897 | continue; | |
1898 | ||
1899 | nbytes = write(pipefd[1], address, INET6_ADDRSTRLEN); | |
1900 | if (nbytes < 0) { | |
1901 | ERROR("write failed"); | |
1902 | goto out; | |
1903 | } | |
1904 | count++; | |
9c83a661 | 1905 | } |
ae22a220 | 1906 | ret = 0; |
9c83a661 | 1907 | |
ae22a220 ÇO |
1908 | out: |
1909 | if(interfaceArray) | |
1910 | freeifaddrs(interfaceArray); | |
9c83a661 | 1911 | |
ae22a220 ÇO |
1912 | /* close the write-end of the pipe, thus sending EOF to the reader */ |
1913 | close(pipefd[1]); | |
1914 | exit(ret); | |
6849cb5b | 1915 | } |
9c83a661 | 1916 | |
ae22a220 ÇO |
1917 | /* close the write-end of the pipe */ |
1918 | close(pipefd[1]); | |
1919 | ||
358afd84 | 1920 | while (read(pipefd[0], &address, INET6_ADDRSTRLEN) == INET6_ADDRSTRLEN) { |
9c88ff1f | 1921 | if(!add_to_array(&addresses, address, count)) |
ae22a220 | 1922 | ERROR("PARENT: add_to_array failed"); |
9c88ff1f | 1923 | count++; |
9c83a661 SG |
1924 | } |
1925 | ||
ae22a220 ÇO |
1926 | if (wait_for_pid(pid) != 0) { |
1927 | for(i=0;i<count;i++) | |
1928 | free(addresses[i]); | |
1929 | free(addresses); | |
1930 | addresses = NULL; | |
1931 | } | |
9c83a661 | 1932 | |
ae22a220 ÇO |
1933 | /* close the read-end of the pipe */ |
1934 | close(pipefd[0]); | |
9c83a661 SG |
1935 | |
1936 | /* Append NULL to the array */ | |
9c88ff1f ÇO |
1937 | if(addresses) |
1938 | addresses = (char **)lxc_append_null_to_array((void **)addresses, count); | |
9c83a661 SG |
1939 | |
1940 | return addresses; | |
1941 | } | |
1942 | ||
858377e4 SH |
1943 | WRAP_API_3(char **, lxcapi_get_ips, const char *, const char *, int) |
1944 | ||
1945 | static int do_lxcapi_get_config_item(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb SG |
1946 | { |
1947 | int ret; | |
1948 | ||
1949 | if (!c || !c->lxc_conf) | |
1950 | return -1; | |
5cee8c50 | 1951 | if (container_mem_lock(c)) |
72d0e1cb | 1952 | return -1; |
72d0e1cb | 1953 | ret = lxc_get_config_item(c->lxc_conf, key, retv, inlen); |
5cee8c50 | 1954 | container_mem_unlock(c); |
72d0e1cb SG |
1955 | return ret; |
1956 | } | |
1957 | ||
858377e4 SH |
1958 | WRAP_API_3(int, lxcapi_get_config_item, const char *, char *, int) |
1959 | ||
1960 | static char* do_lxcapi_get_running_config_item(struct lxc_container *c, const char *key) | |
8ac18377 ÇO |
1961 | { |
1962 | char *ret; | |
1963 | ||
1964 | if (!c || !c->lxc_conf) | |
1965 | return NULL; | |
1966 | if (container_mem_lock(c)) | |
1967 | return NULL; | |
858377e4 | 1968 | ret = lxc_cmd_get_config_item(c->name, key, do_lxcapi_get_config_path(c)); |
8ac18377 ÇO |
1969 | container_mem_unlock(c); |
1970 | return ret; | |
1971 | } | |
1972 | ||
858377e4 SH |
1973 | WRAP_API_1(char *, lxcapi_get_running_config_item, const char *) |
1974 | ||
1975 | static int do_lxcapi_get_keys(struct lxc_container *c, const char *key, char *retv, int inlen) | |
72d0e1cb SG |
1976 | { |
1977 | if (!key) | |
1978 | return lxc_listconfigs(retv, inlen); | |
1979 | /* | |
1980 | * Support 'lxc.network.<idx>', i.e. 'lxc.network.0' | |
1981 | * This is an intelligent result to show which keys are valid given | |
1982 | * the type of nic it is | |
1983 | */ | |
1984 | if (!c || !c->lxc_conf) | |
1985 | return -1; | |
5cee8c50 | 1986 | if (container_mem_lock(c)) |
72d0e1cb SG |
1987 | return -1; |
1988 | int ret = -1; | |
1989 | if (strncmp(key, "lxc.network.", 12) == 0) | |
6849cb5b | 1990 | ret = lxc_list_nicconfigs(c->lxc_conf, key, retv, inlen); |
5cee8c50 | 1991 | container_mem_unlock(c); |
72d0e1cb SG |
1992 | return ret; |
1993 | } | |
1994 | ||
858377e4 SH |
1995 | WRAP_API_3(int, lxcapi_get_keys, const char *, char *, int) |
1996 | ||
1997 | static bool do_lxcapi_save_config(struct lxc_container *c, const char *alt_file) | |
72d0e1cb | 1998 | { |
39dc698c SH |
1999 | FILE *fout; |
2000 | bool ret = false, need_disklock = false; | |
2001 | int lret; | |
2002 | ||
72d0e1cb SG |
2003 | if (!alt_file) |
2004 | alt_file = c->configfile; | |
2005 | if (!alt_file) | |
6849cb5b | 2006 | return false; // should we write to stdout if no file is specified? |
39dc698c SH |
2007 | |
2008 | // If we haven't yet loaded a config, load the stock config | |
2009 | if (!c->lxc_conf) { | |
858377e4 | 2010 | if (!do_lxcapi_load_config(c, lxc_global_config_value("lxc.default_config"))) { |
959aee9c | 2011 | ERROR("Error loading default configuration file %s while saving %s", lxc_global_config_value("lxc.default_config"), c->name); |
72d0e1cb SG |
2012 | return false; |
2013 | } | |
39dc698c | 2014 | } |
72d0e1cb | 2015 | |
5a3d2e1e SG |
2016 | if (!create_container_dir(c)) |
2017 | return false; | |
2018 | ||
39dc698c SH |
2019 | /* |
2020 | * If we're writing to the container's config file, take the | |
2021 | * disk lock. Otherwise just take the memlock to protect the | |
2022 | * struct lxc_container while we're traversing it. | |
2023 | */ | |
2024 | if (strcmp(c->configfile, alt_file) == 0) | |
2025 | need_disklock = true; | |
2026 | ||
2027 | if (need_disklock) | |
2028 | lret = container_disk_lock(c); | |
2029 | else | |
2030 | lret = container_mem_lock(c); | |
2031 | ||
2032 | if (lret) | |
72d0e1cb | 2033 | return false; |
39dc698c SH |
2034 | |
2035 | fout = fopen(alt_file, "w"); | |
2036 | if (!fout) | |
2037 | goto out; | |
6b0d5538 | 2038 | write_config(fout, c->lxc_conf); |
72d0e1cb | 2039 | fclose(fout); |
39dc698c SH |
2040 | ret = true; |
2041 | ||
2042 | out: | |
2043 | if (need_disklock) | |
2044 | container_disk_unlock(c); | |
2045 | else | |
2046 | container_mem_unlock(c); | |
2047 | return ret; | |
72d0e1cb SG |
2048 | } |
2049 | ||
858377e4 SH |
2050 | WRAP_API_1(bool, lxcapi_save_config, const char *) |
2051 | ||
0ea055b3 CB |
2052 | |
2053 | static bool mod_rdep(struct lxc_container *c0, struct lxc_container *c, bool inc) | |
dfb31b25 | 2054 | { |
0ea055b3 CB |
2055 | FILE *f1; |
2056 | struct stat fbuf; | |
42342bed CB |
2057 | void *buf = NULL; |
2058 | char *del = NULL; | |
dfb31b25 | 2059 | char path[MAXPATHLEN]; |
0ea055b3 CB |
2060 | char newpath[MAXPATHLEN]; |
2061 | int fd, ret, n = 0, v = 0; | |
dfb31b25 | 2062 | bool bret = false; |
42342bed | 2063 | size_t len = 0, bytes = 0; |
dfb31b25 | 2064 | |
0ea055b3 | 2065 | if (container_disk_lock(c0)) |
dfb31b25 | 2066 | return false; |
0ea055b3 CB |
2067 | |
2068 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c0->config_path, c0->name); | |
dfb31b25 SH |
2069 | if (ret < 0 || ret > MAXPATHLEN) |
2070 | goto out; | |
0ea055b3 CB |
2071 | ret = snprintf(newpath, MAXPATHLEN, "%s\n%s\n", c->config_path, c->name); |
2072 | if (ret < 0 || ret > MAXPATHLEN) | |
dfb31b25 | 2073 | goto out; |
0ea055b3 CB |
2074 | |
2075 | /* If we find an lxc-snapshot file using the old format only listing the | |
2076 | * number of snapshots we will keep using it. */ | |
2077 | f1 = fopen(path, "r"); | |
2078 | if (f1) { | |
2079 | n = fscanf(f1, "%d", &v); | |
2080 | fclose(f1); | |
2081 | if (n == 1 && v == 0) { | |
2082 | remove(path); | |
2083 | n = 0; | |
2084 | } | |
dfb31b25 | 2085 | } |
0ea055b3 CB |
2086 | if (n == 1) { |
2087 | v += inc ? 1 : -1; | |
2088 | f1 = fopen(path, "w"); | |
2089 | if (!f1) | |
2090 | goto out; | |
2091 | if (fprintf(f1, "%d\n", v) < 0) { | |
2092 | ERROR("Error writing new snapshots value"); | |
2093 | fclose(f1); | |
2094 | goto out; | |
2095 | } | |
2096 | ret = fclose(f1); | |
2097 | if (ret != 0) { | |
2098 | SYSERROR("Error writing to or closing snapshots file"); | |
2099 | goto out; | |
2100 | } | |
2101 | } else { | |
2102 | /* Here we know that we have or can use an lxc-snapshot file | |
2103 | * using the new format. */ | |
2104 | if (inc) { | |
2105 | f1 = fopen(path, "a"); | |
2106 | if (!f1) | |
2107 | goto out; | |
2108 | ||
2109 | if (fprintf(f1, "%s", newpath) < 0) { | |
2110 | ERROR("Error writing new snapshots entry"); | |
2111 | ret = fclose(f1); | |
2112 | if (ret != 0) | |
2113 | SYSERROR("Error writing to or closing snapshots file"); | |
2114 | goto out; | |
2115 | } | |
2116 | ||
2117 | ret = fclose(f1); | |
2118 | if (ret != 0) { | |
2119 | SYSERROR("Error writing to or closing snapshots file"); | |
2120 | goto out; | |
2121 | } | |
2122 | } else if (!inc) { | |
d028235d SG |
2123 | if ((fd = open(path, O_RDWR | O_CLOEXEC)) < 0) |
2124 | goto out; | |
2125 | ||
2126 | if (fstat(fd, &fbuf) < 0) { | |
2127 | close(fd); | |
2128 | goto out; | |
2129 | } | |
2130 | ||
2131 | if (fbuf.st_size != 0) { | |
2132 | /* write terminating \0-byte to file */ | |
2133 | if (pwrite(fd, "", 1, fbuf.st_size) <= 0) { | |
2134 | close(fd); | |
2135 | goto out; | |
2136 | } | |
2137 | ||
2138 | buf = mmap(NULL, fbuf.st_size + 1, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | |
2139 | if (buf == MAP_FAILED) { | |
2140 | SYSERROR("Failed to create mapping %s", path); | |
2141 | close(fd); | |
2142 | goto out; | |
2143 | } | |
2144 | ||
2145 | len = strlen(newpath); | |
2146 | while ((del = strstr((char *)buf, newpath))) { | |
2147 | memmove(del, del + len, strlen(del) - len + 1); | |
2148 | bytes += len; | |
2149 | } | |
2150 | ||
2151 | munmap(buf, fbuf.st_size + 1); | |
2152 | if (ftruncate(fd, fbuf.st_size - bytes) < 0) { | |
2153 | SYSERROR("Failed to truncate file %s", path); | |
2154 | close(fd); | |
2155 | goto out; | |
2156 | } | |
2157 | } | |
2158 | close(fd); | |
2159 | } | |
0ea055b3 CB |
2160 | |
2161 | /* If the lxc-snapshot file is empty, remove it. */ | |
2162 | if (stat(path, &fbuf) < 0) | |
2163 | goto out; | |
d028235d SG |
2164 | if (!fbuf.st_size) { |
2165 | remove(path); | |
0ea055b3 | 2166 | } |
dfb31b25 SH |
2167 | } |
2168 | ||
2169 | bret = true; | |
2170 | ||
2171 | out: | |
0ea055b3 | 2172 | container_disk_unlock(c0); |
dfb31b25 SH |
2173 | return bret; |
2174 | } | |
2175 | ||
2176 | static void strip_newline(char *p) | |
2177 | { | |
2178 | size_t len = strlen(p); | |
2179 | if (len < 1) | |
2180 | return; | |
2181 | if (p[len-1] == '\n') | |
2182 | p[len-1] = '\0'; | |
2183 | } | |
2184 | ||
d825fff3 | 2185 | void mod_all_rdeps(struct lxc_container *c, bool inc) |
dfb31b25 SH |
2186 | { |
2187 | struct lxc_container *p; | |
2188 | char *lxcpath = NULL, *lxcname = NULL, path[MAXPATHLEN]; | |
2189 | size_t pathlen = 0, namelen = 0; | |
2190 | FILE *f; | |
2191 | int ret; | |
2192 | ||
2193 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", | |
2194 | c->config_path, c->name); | |
2195 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2196 | ERROR("Path name too long"); | |
2197 | return; | |
2198 | } | |
025ed0f3 | 2199 | f = fopen(path, "r"); |
025ed0f3 | 2200 | if (f == NULL) |
dfb31b25 SH |
2201 | return; |
2202 | while (getline(&lxcpath, &pathlen, f) != -1) { | |
2203 | if (getline(&lxcname, &namelen, f) == -1) { | |
959aee9c | 2204 | ERROR("badly formatted file %s", path); |
dfb31b25 SH |
2205 | goto out; |
2206 | } | |
2207 | strip_newline(lxcpath); | |
2208 | strip_newline(lxcname); | |
2209 | if ((p = lxc_container_new(lxcname, lxcpath)) == NULL) { | |
2210 | ERROR("Unable to find dependent container %s:%s", | |
2211 | lxcpath, lxcname); | |
2212 | continue; | |
2213 | } | |
0ea055b3 CB |
2214 | if (!mod_rdep(p, c, inc)) |
2215 | ERROR("Failed to update snapshots file for %s:%s", | |
dfb31b25 SH |
2216 | lxcpath, lxcname); |
2217 | lxc_container_put(p); | |
2218 | } | |
2219 | out: | |
f10fad2f ME |
2220 | free(lxcpath); |
2221 | free(lxcname); | |
dfb31b25 SH |
2222 | fclose(f); |
2223 | } | |
2224 | ||
18aa217b | 2225 | static bool has_fs_snapshots(struct lxc_container *c) |
dfb31b25 | 2226 | { |
0ea055b3 | 2227 | FILE *f; |
dfb31b25 SH |
2228 | char path[MAXPATHLEN]; |
2229 | int ret, v; | |
0ea055b3 | 2230 | struct stat fbuf; |
dfb31b25 SH |
2231 | bool bret = false; |
2232 | ||
2233 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_snapshots", c->config_path, | |
2234 | c->name); | |
2235 | if (ret < 0 || ret > MAXPATHLEN) | |
2236 | goto out; | |
0ea055b3 CB |
2237 | /* If the file doesn't exist there are no snapshots. */ |
2238 | if (stat(path, &fbuf) < 0) | |
dfb31b25 | 2239 | goto out; |
0ea055b3 CB |
2240 | v = fbuf.st_size; |
2241 | if (v != 0) { | |
2242 | f = fopen(path, "r"); | |
2243 | if (!f) | |
2244 | goto out; | |
2245 | ret = fscanf(f, "%d", &v); | |
2246 | fclose(f); | |
2247 | // TODO: Figure out what to do with the return value of fscanf. | |
2248 | if (ret != 1) | |
2249 | INFO("Container uses new lxc-snapshots format %s", path); | |
2250 | } | |
dfb31b25 SH |
2251 | bret = v != 0; |
2252 | ||
2253 | out: | |
2254 | return bret; | |
2255 | } | |
2256 | ||
18aa217b SH |
2257 | static bool has_snapshots(struct lxc_container *c) |
2258 | { | |
2259 | char path[MAXPATHLEN]; | |
2260 | struct dirent dirent, *direntp; | |
2261 | int count=0; | |
2262 | DIR *dir; | |
2263 | ||
2264 | if (!get_snappath_dir(c, path)) | |
2265 | return false; | |
2266 | dir = opendir(path); | |
2267 | if (!dir) | |
2268 | return false; | |
2269 | while (!readdir_r(dir, &dirent, &direntp)) { | |
2270 | if (!direntp) | |
2271 | break; | |
2272 | ||
2273 | if (!strcmp(direntp->d_name, ".")) | |
2274 | continue; | |
2275 | ||
2276 | if (!strcmp(direntp->d_name, "..")) | |
2277 | continue; | |
2278 | count++; | |
2279 | break; | |
2280 | } | |
2281 | closedir(dir); | |
2282 | return count > 0; | |
2283 | } | |
2284 | ||
297c2d58 | 2285 | static bool do_destroy_container(struct lxc_conf *conf) { |
d028235d SG |
2286 | if (am_unpriv()) { |
2287 | if (userns_exec_1(conf, bdev_destroy_wrapper, conf) < 0) | |
2288 | return false; | |
2289 | return true; | |
2290 | } | |
2291 | return bdev_destroy(conf); | |
297c2d58 CB |
2292 | } |
2293 | ||
4355ab5f SH |
2294 | static int lxc_rmdir_onedev_wrapper(void *data) |
2295 | { | |
2296 | char *arg = (char *) data; | |
18aa217b | 2297 | return lxc_rmdir_onedev(arg, "snaps"); |
4355ab5f SH |
2298 | } |
2299 | ||
18aa217b | 2300 | static bool container_destroy(struct lxc_container *c) |
72d0e1cb | 2301 | { |
c868b261 | 2302 | bool bret = false; |
297c2d58 | 2303 | int ret = 0; |
a70a69e8 | 2304 | struct lxc_conf *conf; |
72d0e1cb | 2305 | |
858377e4 | 2306 | if (!c || !do_lxcapi_is_defined(c)) |
5a3d2e1e SG |
2307 | return false; |
2308 | ||
a70a69e8 | 2309 | conf = c->lxc_conf; |
3bc449ed | 2310 | if (container_disk_lock(c)) |
72d0e1cb | 2311 | return false; |
72d0e1cb | 2312 | |
39dc698c | 2313 | if (!is_stopped(c)) { |
60bf62d4 SH |
2314 | // we should queue some sort of error - in c->error_string? |
2315 | ERROR("container %s is not stopped", c->name); | |
2316 | goto out; | |
72d0e1cb SG |
2317 | } |
2318 | ||
a70a69e8 | 2319 | if (conf && !lxc_list_empty(&conf->hooks[LXCHOOK_DESTROY])) { |
37cf711b | 2320 | /* Start of environment variable setup for hooks */ |
ab7efcf5 | 2321 | if (c->name && setenv("LXC_NAME", c->name, 1)) { |
37cf711b SY |
2322 | SYSERROR("failed to set environment variable for container name"); |
2323 | } | |
ab7efcf5 | 2324 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { |
37cf711b SY |
2325 | SYSERROR("failed to set environment variable for config path"); |
2326 | } | |
ab7efcf5 | 2327 | if (conf->rootfs.mount && setenv("LXC_ROOTFS_MOUNT", conf->rootfs.mount, 1)) { |
37cf711b SY |
2328 | SYSERROR("failed to set environment variable for rootfs mount"); |
2329 | } | |
ab7efcf5 | 2330 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { |
37cf711b SY |
2331 | SYSERROR("failed to set environment variable for rootfs mount"); |
2332 | } | |
2333 | if (conf->console.path && setenv("LXC_CONSOLE", conf->console.path, 1)) { | |
2334 | SYSERROR("failed to set environment variable for console path"); | |
2335 | } | |
2336 | if (conf->console.log_path && setenv("LXC_CONSOLE_LOGPATH", conf->console.log_path, 1)) { | |
2337 | SYSERROR("failed to set environment variable for console log"); | |
2338 | } | |
2339 | /* End of environment variable setup for hooks */ | |
2340 | ||
2341 | if (run_lxc_hooks(c->name, "destroy", conf, c->get_config_path(c), NULL)) { | |
2342 | ERROR("Error executing clone hook for %s", c->name); | |
2343 | goto out; | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | if (current_config && conf == current_config) { | |
858377e4 | 2348 | current_config = NULL; |
37cf711b SY |
2349 | if (conf->logfd != -1) { |
2350 | close(conf->logfd); | |
2351 | conf->logfd = -1; | |
858377e4 SH |
2352 | } |
2353 | } | |
2354 | ||
d028235d SG |
2355 | if (conf && conf->rootfs.path && conf->rootfs.mount) { |
2356 | if (!do_destroy_container(conf)) { | |
2357 | ERROR("Error destroying rootfs for %s", c->name); | |
2358 | goto out; | |
2359 | } | |
2360 | INFO("Destroyed rootfs for %s", c->name); | |
2361 | } | |
60bf62d4 | 2362 | |
dfb31b25 SH |
2363 | mod_all_rdeps(c, false); |
2364 | ||
858377e4 | 2365 | const char *p1 = do_lxcapi_get_config_path(c); |
60bf62d4 SH |
2366 | char *path = alloca(strlen(p1) + strlen(c->name) + 2); |
2367 | sprintf(path, "%s/%s", p1, c->name); | |
c868b261 | 2368 | if (am_unpriv()) |
37cf711b | 2369 | ret = userns_exec_1(conf, lxc_rmdir_onedev_wrapper, path); |
4355ab5f | 2370 | else |
18aa217b | 2371 | ret = lxc_rmdir_onedev(path, "snaps"); |
4355ab5f | 2372 | if (ret < 0) { |
60bf62d4 SH |
2373 | ERROR("Error destroying container directory for %s", c->name); |
2374 | goto out; | |
2375 | } | |
d028235d | 2376 | INFO("Destroyed directory for %s", c->name); |
297c2d58 | 2377 | |
fef48dc9 | 2378 | bret = true; |
60bf62d4 SH |
2379 | |
2380 | out: | |
3bc449ed | 2381 | container_disk_unlock(c); |
fef48dc9 | 2382 | return bret; |
72d0e1cb SG |
2383 | } |
2384 | ||
858377e4 | 2385 | static bool do_lxcapi_destroy(struct lxc_container *c) |
18aa217b SH |
2386 | { |
2387 | if (!c || !lxcapi_is_defined(c)) | |
2388 | return false; | |
2389 | if (has_snapshots(c)) { | |
2390 | ERROR("Container %s has snapshots; not removing", c->name); | |
2391 | return false; | |
2392 | } | |
2393 | ||
2394 | if (has_fs_snapshots(c)) { | |
2395 | ERROR("container %s has snapshots on its rootfs", c->name); | |
2396 | return false; | |
2397 | } | |
2398 | ||
2399 | return container_destroy(c); | |
2400 | } | |
2401 | ||
858377e4 | 2402 | WRAP_API(bool, lxcapi_destroy) |
18aa217b | 2403 | |
858377e4 | 2404 | static bool do_lxcapi_destroy_with_snapshots(struct lxc_container *c) |
18aa217b SH |
2405 | { |
2406 | if (!c || !lxcapi_is_defined(c)) | |
2407 | return false; | |
2408 | if (!lxcapi_snapshot_destroy_all(c)) { | |
2409 | ERROR("Error deleting all snapshots"); | |
2410 | return false; | |
2411 | } | |
2412 | return lxcapi_destroy(c); | |
2413 | } | |
2414 | ||
858377e4 SH |
2415 | WRAP_API(bool, lxcapi_destroy_with_snapshots) |
2416 | ||
96532523 SH |
2417 | static bool set_config_item_locked(struct lxc_container *c, const char *key, const char *v) |
2418 | { | |
2419 | struct lxc_config_t *config; | |
2420 | ||
2421 | if (!c->lxc_conf) | |
2422 | c->lxc_conf = lxc_conf_init(); | |
6b0d5538 | 2423 | if (!c->lxc_conf) |
96532523 SH |
2424 | return false; |
2425 | config = lxc_getconfig(key); | |
2426 | if (!config) | |
2427 | return false; | |
6b0d5538 | 2428 | if (config->cb(key, v, c->lxc_conf) != 0) |
f979ac15 | 2429 | return false; |
6b0d5538 | 2430 | return do_append_unexp_config_line(c->lxc_conf, key, v); |
96532523 SH |
2431 | } |
2432 | ||
858377e4 | 2433 | static bool do_lxcapi_set_config_item(struct lxc_container *c, const char *key, const char *v) |
72d0e1cb | 2434 | { |
72d0e1cb | 2435 | bool b = false; |
72d0e1cb SG |
2436 | |
2437 | if (!c) | |
2438 | return false; | |
2439 | ||
5cee8c50 | 2440 | if (container_mem_lock(c)) |
72d0e1cb SG |
2441 | return false; |
2442 | ||
96532523 | 2443 | b = set_config_item_locked(c, key, v); |
72d0e1cb | 2444 | |
5cee8c50 | 2445 | container_mem_unlock(c); |
72d0e1cb SG |
2446 | return b; |
2447 | } | |
2448 | ||
858377e4 SH |
2449 | WRAP_API_2(bool, lxcapi_set_config_item, const char *, const char *) |
2450 | ||
72d0e1cb SG |
2451 | static char *lxcapi_config_file_name(struct lxc_container *c) |
2452 | { | |
2453 | if (!c || !c->configfile) | |
2454 | return NULL; | |
2455 | return strdup(c->configfile); | |
2456 | } | |
2457 | ||
2a59a681 SH |
2458 | static const char *lxcapi_get_config_path(struct lxc_container *c) |
2459 | { | |
2460 | if (!c || !c->config_path) | |
2461 | return NULL; | |
2462 | return (const char *)(c->config_path); | |
2463 | } | |
2464 | ||
afeecbba SH |
2465 | /* |
2466 | * not for export | |
2467 | * Just recalculate the c->configfile based on the | |
2468 | * c->config_path, which must be set. | |
2469 | * The lxc_container must be locked or not yet public. | |
2470 | */ | |
2471 | static bool set_config_filename(struct lxc_container *c) | |
2472 | { | |
2473 | char *newpath; | |
2474 | int len, ret; | |
2475 | ||
2476 | if (!c->config_path) | |
2477 | return false; | |
2478 | ||
2479 | /* $lxc_path + "/" + c->name + "/" + "config" + '\0' */ | |
2480 | len = strlen(c->config_path) + strlen(c->name) + strlen("config") + 3; | |
2481 | newpath = malloc(len); | |
2482 | if (!newpath) | |
2483 | return false; | |
2484 | ||
2485 | ret = snprintf(newpath, len, "%s/%s/config", c->config_path, c->name); | |
2486 | if (ret < 0 || ret >= len) { | |
2487 | fprintf(stderr, "Error printing out config file name\n"); | |
2488 | free(newpath); | |
2489 | return false; | |
2490 | } | |
2491 | ||
f10fad2f | 2492 | free(c->configfile); |
afeecbba SH |
2493 | c->configfile = newpath; |
2494 | ||
2495 | return true; | |
2496 | } | |
2497 | ||
858377e4 | 2498 | static bool do_lxcapi_set_config_path(struct lxc_container *c, const char *path) |
2a59a681 SH |
2499 | { |
2500 | char *p; | |
2501 | bool b = false; | |
afeecbba | 2502 | char *oldpath = NULL; |
2a59a681 SH |
2503 | |
2504 | if (!c) | |
2505 | return b; | |
2506 | ||
5cee8c50 | 2507 | if (container_mem_lock(c)) |
2a59a681 SH |
2508 | return b; |
2509 | ||
2510 | p = strdup(path); | |
afeecbba SH |
2511 | if (!p) { |
2512 | ERROR("Out of memory setting new lxc path"); | |
2a59a681 | 2513 | goto err; |
afeecbba SH |
2514 | } |
2515 | ||
2a59a681 SH |
2516 | b = true; |
2517 | if (c->config_path) | |
afeecbba | 2518 | oldpath = c->config_path; |
2a59a681 | 2519 | c->config_path = p; |
afeecbba SH |
2520 | |
2521 | /* Since we've changed the config path, we have to change the | |
2522 | * config file name too */ | |
2523 | if (!set_config_filename(c)) { | |
2524 | ERROR("Out of memory setting new config filename"); | |
2525 | b = false; | |
2526 | free(c->config_path); | |
2527 | c->config_path = oldpath; | |
2528 | oldpath = NULL; | |
2529 | } | |
2a59a681 | 2530 | err: |
f10fad2f | 2531 | free(oldpath); |
5cee8c50 | 2532 | container_mem_unlock(c); |
2a59a681 SH |
2533 | return b; |
2534 | } | |
2535 | ||
858377e4 | 2536 | WRAP_API_1(bool, lxcapi_set_config_path, const char *) |
2a59a681 | 2537 | |
858377e4 | 2538 | static bool do_lxcapi_set_cgroup_item(struct lxc_container *c, const char *subsys, const char *value) |
794dd120 SH |
2539 | { |
2540 | int ret; | |
794dd120 SH |
2541 | |
2542 | if (!c) | |
2543 | return false; | |
2544 | ||
3bc449ed | 2545 | if (is_stopped(c)) |
794dd120 SH |
2546 | return false; |
2547 | ||
3bc449ed SH |
2548 | if (container_disk_lock(c)) |
2549 | return false; | |
794dd120 | 2550 | |
33ad9f1a | 2551 | ret = lxc_cgroup_set(subsys, value, c->name, c->config_path); |
3bc449ed SH |
2552 | |
2553 | container_disk_unlock(c); | |
2554 | return ret == 0; | |
794dd120 SH |
2555 | } |
2556 | ||
858377e4 SH |
2557 | WRAP_API_2(bool, lxcapi_set_cgroup_item, const char *, const char *) |
2558 | ||
2559 | static int do_lxcapi_get_cgroup_item(struct lxc_container *c, const char *subsys, char *retv, int inlen) | |
794dd120 | 2560 | { |
3bc449ed | 2561 | int ret; |
794dd120 | 2562 | |
6502006a | 2563 | if (!c) |
794dd120 SH |
2564 | return -1; |
2565 | ||
3bc449ed | 2566 | if (is_stopped(c)) |
794dd120 SH |
2567 | return -1; |
2568 | ||
3bc449ed SH |
2569 | if (container_disk_lock(c)) |
2570 | return -1; | |
794dd120 | 2571 | |
33ad9f1a | 2572 | ret = lxc_cgroup_get(subsys, retv, inlen, c->name, c->config_path); |
794dd120 | 2573 | |
3bc449ed | 2574 | container_disk_unlock(c); |
794dd120 SH |
2575 | return ret; |
2576 | } | |
2577 | ||
858377e4 SH |
2578 | WRAP_API_3(int, lxcapi_get_cgroup_item, const char *, char *, int) |
2579 | ||
593e8478 | 2580 | const char *lxc_get_global_config_item(const char *key) |
83c98d82 | 2581 | { |
593e8478 | 2582 | return lxc_global_config_value(key); |
a8428dfa SH |
2583 | } |
2584 | ||
b6b918a1 SG |
2585 | const char *lxc_get_version(void) |
2586 | { | |
95ee490b | 2587 | return LXC_VERSION; |
b6b918a1 SG |
2588 | } |
2589 | ||
f0ca2726 | 2590 | static int copy_file(const char *old, const char *new) |
9be53773 SH |
2591 | { |
2592 | int in, out; | |
2593 | ssize_t len, ret; | |
2594 | char buf[8096]; | |
2595 | struct stat sbuf; | |
2596 | ||
2597 | if (file_exists(new)) { | |
2598 | ERROR("copy destination %s exists", new); | |
2599 | return -1; | |
2600 | } | |
2601 | ret = stat(old, &sbuf); | |
2602 | if (ret < 0) { | |
dfb31b25 | 2603 | INFO("Error stat'ing %s", old); |
9be53773 SH |
2604 | return -1; |
2605 | } | |
2606 | ||
2607 | in = open(old, O_RDONLY); | |
2608 | if (in < 0) { | |
dfb31b25 | 2609 | SYSERROR("Error opening original file %s", old); |
9be53773 SH |
2610 | return -1; |
2611 | } | |
2612 | out = open(new, O_CREAT | O_EXCL | O_WRONLY, 0644); | |
2613 | if (out < 0) { | |
dfb31b25 | 2614 | SYSERROR("Error opening new file %s", new); |
9be53773 SH |
2615 | close(in); |
2616 | return -1; | |
2617 | } | |
2618 | ||
2619 | while (1) { | |
2620 | len = read(in, buf, 8096); | |
2621 | if (len < 0) { | |
dfb31b25 | 2622 | SYSERROR("Error reading old file %s", old); |
9be53773 SH |
2623 | goto err; |
2624 | } | |
2625 | if (len == 0) | |
2626 | break; | |
2627 | ret = write(out, buf, len); | |
6849cb5b | 2628 | if (ret < len) { // should we retry? |
dfb31b25 | 2629 | SYSERROR("Error: write to new file %s was interrupted", new); |
9be53773 SH |
2630 | goto err; |
2631 | } | |
2632 | } | |
2633 | close(in); | |
2634 | close(out); | |
2635 | ||
2636 | // we set mode, but not owner/group | |
2637 | ret = chmod(new, sbuf.st_mode); | |
2638 | if (ret) { | |
dfb31b25 | 2639 | SYSERROR("Error setting mode on %s", new); |
9be53773 SH |
2640 | return -1; |
2641 | } | |
2642 | ||
2643 | return 0; | |
2644 | ||
2645 | err: | |
2646 | close(in); | |
2647 | close(out); | |
2648 | return -1; | |
2649 | } | |
2650 | ||
9be53773 SH |
2651 | static int copyhooks(struct lxc_container *oldc, struct lxc_container *c) |
2652 | { | |
619256b5 | 2653 | int i, len, ret; |
9be53773 | 2654 | struct lxc_list *it; |
619256b5 ÇO |
2655 | char *cpath; |
2656 | ||
2657 | len = strlen(oldc->config_path) + strlen(oldc->name) + 3; | |
2658 | cpath = alloca(len); | |
2659 | ret = snprintf(cpath, len, "%s/%s/", oldc->config_path, oldc->name); | |
2660 | if (ret < 0 || ret >= len) | |
2661 | return -1; | |
9be53773 SH |
2662 | |
2663 | for (i=0; i<NUM_LXC_HOOKS; i++) { | |
2664 | lxc_list_for_each(it, &c->lxc_conf->hooks[i]) { | |
2665 | char *hookname = it->elem; | |
c32981c3 | 2666 | char *fname = strrchr(hookname, '/'); |
9be53773 SH |
2667 | char tmppath[MAXPATHLEN]; |
2668 | if (!fname) // relative path - we don't support, but maybe we should | |
2669 | return 0; | |
619256b5 ÇO |
2670 | if (strncmp(hookname, cpath, len - 1) != 0) { |
2671 | // this hook is public - ignore | |
2672 | continue; | |
2673 | } | |
9be53773 SH |
2674 | // copy the script, and change the entry in confile |
2675 | ret = snprintf(tmppath, MAXPATHLEN, "%s/%s/%s", | |
2676 | c->config_path, c->name, fname+1); | |
2677 | if (ret < 0 || ret >= MAXPATHLEN) | |
2678 | return -1; | |
2679 | ret = copy_file(it->elem, tmppath); | |
2680 | if (ret < 0) | |
2681 | return -1; | |
2682 | free(it->elem); | |
2683 | it->elem = strdup(tmppath); | |
2684 | if (!it->elem) { | |
2685 | ERROR("out of memory copying hook path"); | |
2686 | return -1; | |
2687 | } | |
9be53773 SH |
2688 | } |
2689 | } | |
2690 | ||
67702c21 SH |
2691 | if (!clone_update_unexp_hooks(c->lxc_conf, oldc->config_path, |
2692 | c->config_path, oldc->name, c->name)) { | |
6b0d5538 SH |
2693 | ERROR("Error saving new hooks in clone"); |
2694 | return -1; | |
2695 | } | |
858377e4 | 2696 | do_lxcapi_save_config(c, NULL); |
9be53773 SH |
2697 | return 0; |
2698 | } | |
2699 | ||
9be53773 SH |
2700 | |
2701 | static int copy_fstab(struct lxc_container *oldc, struct lxc_container *c) | |
2702 | { | |
2703 | char newpath[MAXPATHLEN]; | |
2704 | char *oldpath = oldc->lxc_conf->fstab; | |
2705 | int ret; | |
2706 | ||
2707 | if (!oldpath) | |
2708 | return 0; | |
2709 | ||
6b0d5538 SH |
2710 | clear_unexp_config_line(c->lxc_conf, "lxc.mount", false); |
2711 | ||
c32981c3 | 2712 | char *p = strrchr(oldpath, '/'); |
9be53773 SH |
2713 | if (!p) |
2714 | return -1; | |
2715 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s%s", | |
2716 | c->config_path, c->name, p); | |
2717 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2718 | ERROR("error printing new path for %s", oldpath); | |
2719 | return -1; | |
2720 | } | |
2721 | if (file_exists(newpath)) { | |
2722 | ERROR("error: fstab file %s exists", newpath); | |
2723 | return -1; | |
2724 | } | |
2725 | ||
2726 | if (copy_file(oldpath, newpath) < 0) { | |
2727 | ERROR("error: copying %s to %s", oldpath, newpath); | |
2728 | return -1; | |
2729 | } | |
2730 | free(c->lxc_conf->fstab); | |
2731 | c->lxc_conf->fstab = strdup(newpath); | |
2732 | if (!c->lxc_conf->fstab) { | |
2733 | ERROR("error: allocating pathname"); | |
2734 | return -1; | |
2735 | } | |
6b0d5538 SH |
2736 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.mount", newpath)) { |
2737 | ERROR("error saving new lxctab"); | |
2738 | return -1; | |
2739 | } | |
9be53773 SH |
2740 | |
2741 | return 0; | |
2742 | } | |
2743 | ||
dfb31b25 SH |
2744 | static void copy_rdepends(struct lxc_container *c, struct lxc_container *c0) |
2745 | { | |
2746 | char path0[MAXPATHLEN], path1[MAXPATHLEN]; | |
2747 | int ret; | |
2748 | ||
2749 | ret = snprintf(path0, MAXPATHLEN, "%s/%s/lxc_rdepends", c0->config_path, | |
2750 | c0->name); | |
2751 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2752 | WARN("Error copying reverse dependencies"); | |
2753 | return; | |
2754 | } | |
2755 | ret = snprintf(path1, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
2756 | c->name); | |
2757 | if (ret < 0 || ret >= MAXPATHLEN) { | |
2758 | WARN("Error copying reverse dependencies"); | |
2759 | return; | |
2760 | } | |
2761 | if (copy_file(path0, path1) < 0) { | |
2762 | INFO("Error copying reverse dependencies"); | |
2763 | return; | |
2764 | } | |
2765 | } | |
2766 | ||
2767 | static bool add_rdepends(struct lxc_container *c, struct lxc_container *c0) | |
2768 | { | |
2769 | int ret; | |
2770 | char path[MAXPATHLEN]; | |
2771 | FILE *f; | |
2772 | bool bret; | |
2773 | ||
2774 | ret = snprintf(path, MAXPATHLEN, "%s/%s/lxc_rdepends", c->config_path, | |
2775 | c->name); | |
2776 | if (ret < 0 || ret >= MAXPATHLEN) | |
2777 | return false; | |
2778 | f = fopen(path, "a"); | |
2779 | if (!f) | |
2780 | return false; | |
2781 | bret = true; | |
2782 | // if anything goes wrong, just return an error | |
2783 | if (fprintf(f, "%s\n%s\n", c0->config_path, c0->name) < 0) | |
2784 | bret = false; | |
2785 | if (fclose(f) != 0) | |
2786 | bret = false; | |
2787 | return bret; | |
2788 | } | |
2789 | ||
9be53773 | 2790 | static int copy_storage(struct lxc_container *c0, struct lxc_container *c, |
d659597e | 2791 | const char *newtype, int flags, const char *bdevdata, uint64_t newsize) |
9be53773 SH |
2792 | { |
2793 | struct bdev *bdev; | |
dfb31b25 | 2794 | int need_rdep; |
9be53773 | 2795 | |
1354955b | 2796 | bdev = bdev_copy(c0, c->name, c->config_path, newtype, flags, |
dfb31b25 | 2797 | bdevdata, newsize, &need_rdep); |
9be53773 | 2798 | if (!bdev) { |
dfb31b25 | 2799 | ERROR("Error copying storage"); |
9be53773 SH |
2800 | return -1; |
2801 | } | |
2802 | free(c->lxc_conf->rootfs.path); | |
2803 | c->lxc_conf->rootfs.path = strdup(bdev->src); | |
2804 | bdev_put(bdev); | |
dfb31b25 SH |
2805 | if (!c->lxc_conf->rootfs.path) { |
2806 | ERROR("Out of memory while setting storage path"); | |
9be53773 | 2807 | return -1; |
dfb31b25 | 2808 | } |
6b0d5538 SH |
2809 | // We will simply append a new lxc.rootfs entry to the unexpanded config |
2810 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs", false); | |
2811 | if (!do_append_unexp_config_line(c->lxc_conf, "lxc.rootfs", c->lxc_conf->rootfs.path)) { | |
222dc581 | 2812 | ERROR("Error saving new rootfs to cloned config"); |
d0218321 SH |
2813 | return -1; |
2814 | } | |
eee59f94 SH |
2815 | if (flags & LXC_CLONE_SNAPSHOT) |
2816 | copy_rdepends(c, c0); | |
dfb31b25 SH |
2817 | if (need_rdep) { |
2818 | if (!add_rdepends(c, c0)) | |
2819 | WARN("Error adding reverse dependency from %s to %s", | |
2820 | c->name, c0->name); | |
2821 | } | |
2822 | ||
2823 | mod_all_rdeps(c, true); | |
2824 | ||
9be53773 SH |
2825 | return 0; |
2826 | } | |
2827 | ||
1354955b SH |
2828 | struct clone_update_data { |
2829 | struct lxc_container *c0; | |
2830 | struct lxc_container *c1; | |
2831 | int flags; | |
2832 | char **hookargs; | |
2833 | }; | |
2834 | ||
2835 | static int clone_update_rootfs(struct clone_update_data *data) | |
9be53773 | 2836 | { |
1354955b SH |
2837 | struct lxc_container *c0 = data->c0; |
2838 | struct lxc_container *c = data->c1; | |
2839 | int flags = data->flags; | |
2840 | char **hookargs = data->hookargs; | |
9be53773 SH |
2841 | int ret = -1; |
2842 | char path[MAXPATHLEN]; | |
2843 | struct bdev *bdev; | |
2844 | FILE *fout; | |
148e91f5 | 2845 | struct lxc_conf *conf = c->lxc_conf; |
9be53773 SH |
2846 | |
2847 | /* update hostname in rootfs */ | |
2848 | /* we're going to mount, so run in a clean namespace to simplify cleanup */ | |
2849 | ||
1354955b SH |
2850 | if (setgid(0) < 0) { |
2851 | ERROR("Failed to setgid to 0"); | |
2852 | return -1; | |
2853 | } | |
2854 | if (setuid(0) < 0) { | |
2855 | ERROR("Failed to setuid to 0"); | |
9be53773 | 2856 | return -1; |
1354955b | 2857 | } |
c476bdce SH |
2858 | if (setgroups(0, NULL) < 0) |
2859 | WARN("Failed to clear groups"); | |
9be53773 | 2860 | |
1354955b SH |
2861 | if (unshare(CLONE_NEWNS) < 0) |
2862 | return -1; | |
76a26f55 | 2863 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
9be53773 | 2864 | if (!bdev) |
1354955b | 2865 | return -1; |
cf3ef16d SH |
2866 | if (strcmp(bdev->type, "dir") != 0) { |
2867 | if (unshare(CLONE_NEWNS) < 0) { | |
2868 | ERROR("error unsharing mounts"); | |
e7de366c | 2869 | bdev_put(bdev); |
1354955b | 2870 | return -1; |
cf3ef16d | 2871 | } |
2c6f3fc9 SH |
2872 | if (detect_shared_rootfs()) { |
2873 | if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL)) { | |
2874 | SYSERROR("Failed to make / rslave"); | |
2875 | ERROR("Continuing..."); | |
2876 | } | |
2877 | } | |
e7de366c SG |
2878 | if (bdev->ops->mount(bdev) < 0) { |
2879 | bdev_put(bdev); | |
1354955b | 2880 | return -1; |
e7de366c | 2881 | } |
cf3ef16d | 2882 | } else { // TODO come up with a better way |
f10fad2f | 2883 | free(bdev->dest); |
cf3ef16d SH |
2884 | bdev->dest = strdup(bdev->src); |
2885 | } | |
148e91f5 SH |
2886 | |
2887 | if (!lxc_list_empty(&conf->hooks[LXCHOOK_CLONE])) { | |
2888 | /* Start of environment variable setup for hooks */ | |
ab7efcf5 | 2889 | if (c0->name && setenv("LXC_SRC_NAME", c0->name, 1)) { |
1143ed39 DE |
2890 | SYSERROR("failed to set environment variable for source container name"); |
2891 | } | |
ab7efcf5 | 2892 | if (c->name && setenv("LXC_NAME", c->name, 1)) { |
148e91f5 SH |
2893 | SYSERROR("failed to set environment variable for container name"); |
2894 | } | |
ab7efcf5 | 2895 | if (conf->rcfile && setenv("LXC_CONFIG_FILE", conf->rcfile, 1)) { |
148e91f5 SH |
2896 | SYSERROR("failed to set environment variable for config path"); |
2897 | } | |
ab7efcf5 | 2898 | if (bdev->dest && setenv("LXC_ROOTFS_MOUNT", bdev->dest, 1)) { |
148e91f5 SH |
2899 | SYSERROR("failed to set environment variable for rootfs mount"); |
2900 | } | |
ab7efcf5 | 2901 | if (conf->rootfs.path && setenv("LXC_ROOTFS_PATH", conf->rootfs.path, 1)) { |
148e91f5 SH |
2902 | SYSERROR("failed to set environment variable for rootfs mount"); |
2903 | } | |
2904 | ||
283678ed | 2905 | if (run_lxc_hooks(c->name, "clone", conf, c->get_config_path(c), hookargs)) { |
148e91f5 | 2906 | ERROR("Error executing clone hook for %s", c->name); |
e7de366c | 2907 | bdev_put(bdev); |
1354955b | 2908 | return -1; |
148e91f5 SH |
2909 | } |
2910 | } | |
2911 | ||
2912 | if (!(flags & LXC_CLONE_KEEPNAME)) { | |
2913 | ret = snprintf(path, MAXPATHLEN, "%s/etc/hostname", bdev->dest); | |
e7de366c SG |
2914 | bdev_put(bdev); |
2915 | ||
148e91f5 | 2916 | if (ret < 0 || ret >= MAXPATHLEN) |
1354955b | 2917 | return -1; |
8058be39 | 2918 | if (!file_exists(path)) |
1354955b | 2919 | return 0; |
148e91f5 | 2920 | if (!(fout = fopen(path, "w"))) { |
959aee9c | 2921 | SYSERROR("unable to open %s: ignoring", path); |
1354955b | 2922 | return 0; |
148e91f5 | 2923 | } |
a684f0b7 ÇO |
2924 | if (fprintf(fout, "%s", c->name) < 0) { |
2925 | fclose(fout); | |
1354955b | 2926 | return -1; |
6849cb5b | 2927 | } |
148e91f5 | 2928 | if (fclose(fout) < 0) |
1354955b | 2929 | return -1; |
9be53773 | 2930 | } |
e7de366c SG |
2931 | else |
2932 | bdev_put(bdev); | |
2933 | ||
1354955b SH |
2934 | return 0; |
2935 | } | |
2936 | ||
2937 | static int clone_update_rootfs_wrapper(void *data) | |
2938 | { | |
2939 | struct clone_update_data *arg = (struct clone_update_data *) data; | |
2940 | return clone_update_rootfs(arg); | |
9be53773 SH |
2941 | } |
2942 | ||
2943 | /* | |
2944 | * We want to support: | |
2945 | sudo lxc-clone -o o1 -n n1 -s -L|-fssize fssize -v|--vgname vgname \ | |
2946 | -p|--lvprefix lvprefix -t|--fstype fstype -B backingstore | |
2947 | ||
2948 | -s [ implies overlayfs] | |
2949 | -s -B overlayfs | |
2950 | -s -B aufs | |
2951 | ||
2952 | only rootfs gets converted (copied/snapshotted) on clone. | |
2953 | */ | |
2954 | ||
d5752559 | 2955 | static int create_file_dirname(char *path, struct lxc_conf *conf) |
9be53773 | 2956 | { |
c32981c3 | 2957 | char *p = strrchr(path, '/'); |
d5752559 | 2958 | int ret = -1; |
9be53773 SH |
2959 | |
2960 | if (!p) | |
2961 | return -1; | |
2962 | *p = '\0'; | |
d028235d | 2963 | ret = do_create_container_dir(path, conf); |
9be53773 SH |
2964 | *p = '/'; |
2965 | return ret; | |
2966 | } | |
2967 | ||
030ce9a9 CB |
2968 | /* When we clone a container with overlay lxc.mount.entry entries we need to |
2969 | * update absolute paths for upper- and workdir. This update is done in two | |
2970 | * locations: lxc_conf->unexpanded_config and lxc_conf->mount_list. Both updates | |
2971 | * are done independent of each other since lxc_conf->mountlist may container | |
2972 | * more mount entries (e.g. from other included files) than | |
2973 | * lxc_conf->unexpanded_config . */ | |
2974 | static int update_ovl_paths(struct lxc_conf *lxc_conf, const char *lxc_path, | |
2975 | const char *lxc_name, const char *newpath, | |
2976 | const char *newname) | |
2977 | { | |
2978 | char new_upper[MAXPATHLEN]; | |
2979 | char new_work[MAXPATHLEN]; | |
2980 | char old_upper[MAXPATHLEN]; | |
2981 | char old_work[MAXPATHLEN]; | |
2982 | char *cleanpath = NULL; | |
2983 | int i; | |
2984 | int fret = -1; | |
2985 | int ret = 0; | |
2986 | struct lxc_list *iterator; | |
2987 | const char *ovl_dirs[] = {"br", "upperdir", "workdir"}; | |
2988 | ||
2989 | cleanpath = strdup(newpath); | |
2990 | if (!cleanpath) | |
2991 | goto err; | |
2992 | ||
2993 | remove_trailing_slashes(cleanpath); | |
2994 | ||
2995 | /* We have to update lxc_conf->unexpanded_config separately from | |
2996 | * lxc_conf->mount_list. */ | |
2997 | for (i = 0; i < sizeof(ovl_dirs) / sizeof(ovl_dirs[0]); i++) { | |
2998 | if (!clone_update_unexp_ovl_paths(lxc_conf, lxc_path, newpath, | |
2999 | lxc_name, newname, | |
3000 | ovl_dirs[i])) | |
3001 | goto err; | |
3002 | } | |
3003 | ||
3004 | ret = snprintf(old_work, MAXPATHLEN, "workdir=%s/%s", lxc_path, lxc_name); | |
3005 | if (ret < 0 || ret >= MAXPATHLEN) | |
3006 | goto err; | |
3007 | ||
3008 | ret = snprintf(new_work, MAXPATHLEN, "workdir=%s/%s", cleanpath, newname); | |
3009 | if (ret < 0 || ret >= MAXPATHLEN) | |
3010 | goto err; | |
3011 | ||
3012 | lxc_list_for_each(iterator, &lxc_conf->mount_list) { | |
3013 | char *mnt_entry = NULL; | |
3014 | char *new_mnt_entry = NULL; | |
3015 | char *tmp = NULL; | |
3016 | char *tmp_mnt_entry = NULL; | |
3017 | mnt_entry = iterator->elem; | |
3018 | ||
3019 | if (strstr(mnt_entry, "overlay")) | |
3020 | tmp = "upperdir"; | |
3021 | else if (strstr(mnt_entry, "aufs")) | |
3022 | tmp = "br"; | |
3023 | ||
3024 | if (!tmp) | |
3025 | continue; | |
3026 | ||
3027 | ret = snprintf(old_upper, MAXPATHLEN, "%s=%s/%s", tmp, lxc_path, lxc_name); | |
3028 | if (ret < 0 || ret >= MAXPATHLEN) | |
3029 | goto err; | |
3030 | ||
3031 | ret = snprintf(new_upper, MAXPATHLEN, "%s=%s/%s", tmp, cleanpath, newname); | |
3032 | if (ret < 0 || ret >= MAXPATHLEN) | |
3033 | goto err; | |
3034 | ||
3035 | if (strstr(mnt_entry, old_upper)) { | |
3036 | tmp_mnt_entry = lxc_string_replace(old_upper, new_upper, mnt_entry); | |
3037 | } | |
3038 | ||
3039 | if (strstr(mnt_entry, old_work)) { | |
3040 | if (tmp_mnt_entry) | |
3041 | new_mnt_entry = lxc_string_replace(old_work, new_work, tmp_mnt_entry); | |
3042 | else | |
3043 | new_mnt_entry = lxc_string_replace(old_work, new_work, mnt_entry); | |
3044 | } | |
3045 | ||
3046 | if (new_mnt_entry) { | |
3047 | free(iterator->elem); | |
3048 | iterator->elem = strdup(new_mnt_entry); | |
3049 | } else if (tmp_mnt_entry) { | |
3050 | free(iterator->elem); | |
3051 | iterator->elem = strdup(tmp_mnt_entry); | |
3052 | } | |
3053 | ||
3054 | free(new_mnt_entry); | |
3055 | free(tmp_mnt_entry); | |
3056 | } | |
3057 | ||
3058 | fret = 0; | |
3059 | err: | |
3060 | free(cleanpath); | |
3061 | return fret; | |
3062 | } | |
3063 | ||
858377e4 | 3064 | static struct lxc_container *do_lxcapi_clone(struct lxc_container *c, const char *newname, |
9be53773 | 3065 | const char *lxcpath, int flags, |
d659597e | 3066 | const char *bdevtype, const char *bdevdata, uint64_t newsize, |
148e91f5 | 3067 | char **hookargs) |
9be53773 SH |
3068 | { |
3069 | struct lxc_container *c2 = NULL; | |
3070 | char newpath[MAXPATHLEN]; | |
176d9acb | 3071 | int ret, storage_copied = 0; |
5eea90e8 | 3072 | char *origroot = NULL, *saved_unexp_conf = NULL; |
1354955b | 3073 | struct clone_update_data data; |
3b392519 | 3074 | size_t saved_unexp_len; |
9be53773 | 3075 | FILE *fout; |
1354955b | 3076 | pid_t pid; |
9be53773 | 3077 | |
858377e4 | 3078 | if (!c || !do_lxcapi_is_defined(c)) |
9be53773 SH |
3079 | return NULL; |
3080 | ||
5cee8c50 | 3081 | if (container_mem_lock(c)) |
9be53773 SH |
3082 | return NULL; |
3083 | ||
39dc698c | 3084 | if (!is_stopped(c)) { |
9be53773 SH |
3085 | ERROR("error: Original container (%s) is running", c->name); |
3086 | goto out; | |
3087 | } | |
3088 | ||
3089 | // Make sure the container doesn't yet exist. | |
05d53f4c SH |
3090 | if (!newname) |
3091 | newname = c->name; | |
3092 | if (!lxcpath) | |
858377e4 | 3093 | lxcpath = do_lxcapi_get_config_path(c); |
05d53f4c | 3094 | ret = snprintf(newpath, MAXPATHLEN, "%s/%s/config", lxcpath, newname); |
6849cb5b | 3095 | if (ret < 0 || ret >= MAXPATHLEN) { |
9be53773 SH |
3096 | SYSERROR("clone: failed making config pathname"); |
3097 | goto out; | |
3098 | } | |
3099 | if (file_exists(newpath)) { | |
3100 | ERROR("error: clone: %s exists", newpath); | |
3101 | goto out; | |
3102 | } | |
3103 | ||
d5752559 | 3104 | ret = create_file_dirname(newpath, c->lxc_conf); |
96532523 | 3105 | if (ret < 0 && errno != EEXIST) { |
9be53773 SH |
3106 | ERROR("Error creating container dir for %s", newpath); |
3107 | goto out; | |
3108 | } | |
3109 | ||
3110 | // copy the configuration, tweak it as needed, | |
8d2efe40 SH |
3111 | if (c->lxc_conf->rootfs.path) { |
3112 | origroot = c->lxc_conf->rootfs.path; | |
3113 | c->lxc_conf->rootfs.path = NULL; | |
3114 | } | |
9be53773 SH |
3115 | fout = fopen(newpath, "w"); |
3116 | if (!fout) { | |
3117 | SYSERROR("open %s", newpath); | |
3118 | goto out; | |
3119 | } | |
5eea90e8 SH |
3120 | |
3121 | saved_unexp_conf = c->lxc_conf->unexpanded_config; | |
3b392519 | 3122 | saved_unexp_len = c->lxc_conf->unexpanded_len; |
5eea90e8 SH |
3123 | c->lxc_conf->unexpanded_config = strdup(saved_unexp_conf); |
3124 | if (!c->lxc_conf->unexpanded_config) { | |
3125 | ERROR("Out of memory"); | |
3126 | goto out; | |
3127 | } | |
3128 | clear_unexp_config_line(c->lxc_conf, "lxc.rootfs", false); | |
6b0d5538 | 3129 | write_config(fout, c->lxc_conf); |
9be53773 | 3130 | fclose(fout); |
8d2efe40 | 3131 | c->lxc_conf->rootfs.path = origroot; |
5eea90e8 SH |
3132 | free(c->lxc_conf->unexpanded_config); |
3133 | c->lxc_conf->unexpanded_config = saved_unexp_conf; | |
3134 | saved_unexp_conf = NULL; | |
3b392519 | 3135 | c->lxc_conf->unexpanded_len = saved_unexp_len; |
9be53773 | 3136 | |
05d53f4c | 3137 | sprintf(newpath, "%s/%s/rootfs", lxcpath, newname); |
9be53773 SH |
3138 | if (mkdir(newpath, 0755) < 0) { |
3139 | SYSERROR("error creating %s", newpath); | |
3140 | goto out; | |
3141 | } | |
3142 | ||
1354955b SH |
3143 | if (am_unpriv()) { |
3144 | if (chown_mapped_root(newpath, c->lxc_conf) < 0) { | |
959aee9c | 3145 | ERROR("Error chowning %s to container root", newpath); |
1354955b SH |
3146 | goto out; |
3147 | } | |
3148 | } | |
3149 | ||
05d53f4c | 3150 | c2 = lxc_container_new(newname, lxcpath); |
375c2258 | 3151 | if (!c2) { |
05d53f4c SH |
3152 | ERROR("clone: failed to create new container (%s %s)", newname, |
3153 | lxcpath); | |
9be53773 SH |
3154 | goto out; |
3155 | } | |
8d2efe40 SH |
3156 | |
3157 | // copy/snapshot rootfs's | |
3158 | ret = copy_storage(c, c2, bdevtype, flags, bdevdata, newsize); | |
3159 | if (ret < 0) | |
3160 | goto out; | |
9be53773 | 3161 | |
6b0d5538 | 3162 | |
96532523 | 3163 | // update utsname |
3d7ad474 CB |
3164 | if (!(flags & LXC_CLONE_KEEPNAME)) { |
3165 | clear_unexp_config_line(c2->lxc_conf, "lxc.utsname", false); | |
3166 | ||
3167 | if (!set_config_item_locked(c2, "lxc.utsname", newname)) { | |
3168 | ERROR("Error setting new hostname"); | |
3169 | goto out; | |
3170 | } | |
96532523 SH |
3171 | } |
3172 | ||
619256b5 ÇO |
3173 | // copy hooks |
3174 | ret = copyhooks(c, c2); | |
3175 | if (ret < 0) { | |
3176 | ERROR("error copying hooks"); | |
3177 | goto out; | |
9be53773 SH |
3178 | } |
3179 | ||
3180 | if (copy_fstab(c, c2) < 0) { | |
3181 | ERROR("error copying fstab"); | |
9be53773 SH |
3182 | goto out; |
3183 | } | |
3184 | ||
3185 | // update macaddrs | |
6b0d5538 | 3186 | if (!(flags & LXC_CLONE_KEEPMACADDR)) { |
67702c21 SH |
3187 | if (!network_new_hwaddrs(c2->lxc_conf)) { |
3188 | ERROR("Error updating mac addresses"); | |
6b0d5538 SH |
3189 | goto out; |
3190 | } | |
3191 | } | |
9be53773 | 3192 | |
030ce9a9 CB |
3193 | // update absolute paths for overlay mount directories |
3194 | if (update_ovl_paths(c2->lxc_conf, c->config_path, c->name, lxcpath, newname) < 0) | |
3195 | goto out; | |
3196 | ||
176d9acb SH |
3197 | // We've now successfully created c2's storage, so clear it out if we |
3198 | // fail after this | |
3199 | storage_copied = 1; | |
3200 | ||
375c2258 | 3201 | if (!c2->save_config(c2, NULL)) |
9be53773 | 3202 | goto out; |
9be53773 | 3203 | |
1354955b SH |
3204 | if ((pid = fork()) < 0) { |
3205 | SYSERROR("fork"); | |
9be53773 | 3206 | goto out; |
1354955b SH |
3207 | } |
3208 | if (pid > 0) { | |
3209 | ret = wait_for_pid(pid); | |
3210 | if (ret) | |
3211 | goto out; | |
3212 | container_mem_unlock(c); | |
3213 | return c2; | |
3214 | } | |
3215 | data.c0 = c; | |
3216 | data.c1 = c2; | |
3217 | data.flags = flags; | |
3218 | data.hookargs = hookargs; | |
3219 | if (am_unpriv()) | |
3220 | ret = userns_exec_1(c->lxc_conf, clone_update_rootfs_wrapper, | |
3221 | &data); | |
3222 | else | |
3223 | ret = clone_update_rootfs(&data); | |
3224 | if (ret < 0) | |
3225 | exit(1); | |
9be53773 | 3226 | |
5cee8c50 | 3227 | container_mem_unlock(c); |
1354955b | 3228 | exit(0); |
9be53773 SH |
3229 | |
3230 | out: | |
5cee8c50 | 3231 | container_mem_unlock(c); |
375c2258 | 3232 | if (c2) { |
176d9acb SH |
3233 | if (!storage_copied) |
3234 | c2->lxc_conf->rootfs.path = NULL; | |
375c2258 | 3235 | c2->destroy(c2); |
9be53773 | 3236 | lxc_container_put(c2); |
375c2258 | 3237 | } |
9be53773 SH |
3238 | |
3239 | return NULL; | |
3240 | } | |
3241 | ||
858377e4 SH |
3242 | static struct lxc_container *lxcapi_clone(struct lxc_container *c, const char *newname, |
3243 | const char *lxcpath, int flags, | |
3244 | const char *bdevtype, const char *bdevdata, uint64_t newsize, | |
3245 | char **hookargs) | |
3246 | { | |
3247 | struct lxc_container * ret; | |
3248 | current_config = c ? c->lxc_conf : NULL; | |
3249 | ret = do_lxcapi_clone(c, newname, lxcpath, flags, bdevtype, bdevdata, newsize, hookargs); | |
3250 | current_config = NULL; | |
3251 | return ret; | |
3252 | } | |
3253 | ||
3254 | static bool do_lxcapi_rename(struct lxc_container *c, const char *newname) | |
06e5650e ÇO |
3255 | { |
3256 | struct bdev *bdev; | |
3257 | struct lxc_container *newc; | |
06e5650e | 3258 | |
d693cf93 | 3259 | if (!c || !c->name || !c->config_path || !c->lxc_conf) |
06e5650e ÇO |
3260 | return false; |
3261 | ||
18aa217b SH |
3262 | if (has_fs_snapshots(c) || has_snapshots(c)) { |
3263 | ERROR("Renaming a container with snapshots is not supported"); | |
3264 | return false; | |
3265 | } | |
76a26f55 | 3266 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
06e5650e ÇO |
3267 | if (!bdev) { |
3268 | ERROR("Failed to find original backing store type"); | |
3269 | return false; | |
3270 | } | |
3271 | ||
619256b5 | 3272 | newc = lxcapi_clone(c, newname, c->config_path, LXC_CLONE_KEEPMACADDR, NULL, bdev->type, 0, NULL); |
06e5650e ÇO |
3273 | bdev_put(bdev); |
3274 | if (!newc) { | |
3275 | lxc_container_put(newc); | |
3276 | return false; | |
3277 | } | |
3278 | ||
3279 | if (newc && lxcapi_is_defined(newc)) | |
3280 | lxc_container_put(newc); | |
3281 | ||
18aa217b | 3282 | if (!container_destroy(c)) { |
06e5650e ÇO |
3283 | ERROR("Could not destroy existing container %s", c->name); |
3284 | return false; | |
3285 | } | |
3286 | return true; | |
3287 | } | |
3288 | ||
858377e4 SH |
3289 | WRAP_API_1(bool, lxcapi_rename, const char *) |
3290 | ||
a0e93eeb CS |
3291 | 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) |
3292 | { | |
858377e4 SH |
3293 | int ret; |
3294 | ||
a0e93eeb CS |
3295 | if (!c) |
3296 | return -1; | |
3297 | ||
858377e4 SH |
3298 | current_config = c->lxc_conf; |
3299 | ||
3300 | ret = lxc_attach(c->name, c->config_path, exec_function, exec_payload, options, attached_process); | |
3301 | current_config = NULL; | |
3302 | return ret; | |
a0e93eeb CS |
3303 | } |
3304 | ||
858377e4 | 3305 | static int do_lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
a0e93eeb CS |
3306 | { |
3307 | lxc_attach_command_t command; | |
3308 | pid_t pid; | |
3309 | int r; | |
3310 | ||
3311 | if (!c) | |
3312 | return -1; | |
3313 | ||
3314 | command.program = (char*)program; | |
3315 | command.argv = (char**)argv; | |
3316 | r = lxc_attach(c->name, c->config_path, lxc_attach_run_command, &command, options, &pid); | |
3317 | if (r < 0) { | |
3318 | ERROR("ups"); | |
3319 | return r; | |
3320 | } | |
3321 | return lxc_wait_for_pid_status(pid); | |
3322 | } | |
3323 | ||
858377e4 SH |
3324 | static int lxcapi_attach_run_wait(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char * const argv[]) |
3325 | { | |
3326 | int ret; | |
3327 | current_config = c ? c->lxc_conf : NULL; | |
3328 | ret = do_lxcapi_attach_run_wait(c, options, program, argv); | |
3329 | current_config = NULL; | |
3330 | return ret; | |
3331 | } | |
3332 | ||
74a3920a | 3333 | static int get_next_index(const char *lxcpath, char *cname) |
f5dd1d53 SH |
3334 | { |
3335 | char *fname; | |
3336 | struct stat sb; | |
3337 | int i = 0, ret; | |
3338 | ||
3339 | fname = alloca(strlen(lxcpath) + 20); | |
3340 | while (1) { | |
3341 | sprintf(fname, "%s/snap%d", lxcpath, i); | |
3342 | ret = stat(fname, &sb); | |
3343 | if (ret != 0) | |
3344 | return i; | |
3345 | i++; | |
3346 | } | |
3347 | } | |
3348 | ||
18aa217b SH |
3349 | static bool get_snappath_dir(struct lxc_container *c, char *snappath) |
3350 | { | |
3351 | int ret; | |
3352 | /* | |
3353 | * If the old style snapshot path exists, use it | |
3354 | * /var/lib/lxc -> /var/lib/lxcsnaps | |
3355 | */ | |
3356 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps", c->config_path); | |
3357 | if (ret < 0 || ret >= MAXPATHLEN) | |
3358 | return false; | |
3359 | if (dir_exists(snappath)) { | |
3360 | ret = snprintf(snappath, MAXPATHLEN, "%ssnaps/%s", c->config_path, c->name); | |
3361 | if (ret < 0 || ret >= MAXPATHLEN) | |
3362 | return false; | |
3363 | return true; | |
3364 | } | |
3365 | ||
3366 | /* | |
3367 | * Use the new style path | |
3368 | * /var/lib/lxc -> /var/lib/lxc + c->name + /snaps + \0 | |
3369 | */ | |
3370 | ret = snprintf(snappath, MAXPATHLEN, "%s/%s/snaps", c->config_path, c->name); | |
3371 | if (ret < 0 || ret >= MAXPATHLEN) | |
3372 | return false; | |
3373 | return true; | |
3374 | } | |
3375 | ||
858377e4 | 3376 | static int do_lxcapi_snapshot(struct lxc_container *c, const char *commentfile) |
f5dd1d53 SH |
3377 | { |
3378 | int i, flags, ret; | |
3379 | struct lxc_container *c2; | |
3380 | char snappath[MAXPATHLEN], newname[20]; | |
3381 | ||
840f05df SH |
3382 | if (!c || !lxcapi_is_defined(c)) |
3383 | return -1; | |
3384 | ||
cdd01be2 SH |
3385 | if (!bdev_can_backup(c->lxc_conf)) { |
3386 | ERROR("%s's backing store cannot be backed up.", c->name); | |
3387 | ERROR("Your container must use another backing store type."); | |
3388 | return -1; | |
3389 | } | |
3390 | ||
18aa217b | 3391 | if (!get_snappath_dir(c, snappath)) |
f5dd1d53 | 3392 | return -1; |
18aa217b | 3393 | |
f5dd1d53 SH |
3394 | i = get_next_index(snappath, c->name); |
3395 | ||
3396 | if (mkdir_p(snappath, 0755) < 0) { | |
3397 | ERROR("Failed to create snapshot directory %s", snappath); | |
3398 | return -1; | |
3399 | } | |
3400 | ||
3401 | ret = snprintf(newname, 20, "snap%d", i); | |
3402 | if (ret < 0 || ret >= 20) | |
3403 | return -1; | |
3404 | ||
0a83cbbb SH |
3405 | /* |
3406 | * We pass LXC_CLONE_SNAPSHOT to make sure that a rdepends file entry is | |
3407 | * created in the original container | |
3408 | */ | |
3409 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_KEEPMACADDR | LXC_CLONE_KEEPNAME | | |
3410 | LXC_CLONE_KEEPBDEVTYPE | LXC_CLONE_MAYBE_SNAPSHOT; | |
76a26f55 | 3411 | if (bdev_is_dir(c->lxc_conf, c->lxc_conf->rootfs.path)) { |
8c39f7a4 SH |
3412 | ERROR("Snapshot of directory-backed container requested."); |
3413 | ERROR("Making a copy-clone. If you do want snapshots, then"); | |
1f92162d | 3414 | ERROR("please create an aufs or overlayfs clone first, snapshot that"); |
8c39f7a4 SH |
3415 | ERROR("and keep the original container pristine."); |
3416 | flags &= ~LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
3417 | } | |
858377e4 | 3418 | c2 = do_lxcapi_clone(c, newname, snappath, flags, NULL, NULL, 0, NULL); |
f5dd1d53 | 3419 | if (!c2) { |
959aee9c | 3420 | ERROR("clone of %s:%s failed", c->config_path, c->name); |
f5dd1d53 SH |
3421 | return -1; |
3422 | } | |
3423 | ||
3424 | lxc_container_put(c2); | |
3425 | ||
3426 | // Now write down the creation time | |
3427 | time_t timer; | |
3428 | char buffer[25]; | |
3429 | struct tm* tm_info; | |
025ed0f3 | 3430 | FILE *f; |
f5dd1d53 SH |
3431 | |
3432 | time(&timer); | |
3433 | tm_info = localtime(&timer); | |
3434 | ||
3435 | strftime(buffer, 25, "%Y:%m:%d %H:%M:%S", tm_info); | |
3436 | ||
3437 | char *dfnam = alloca(strlen(snappath) + strlen(newname) + 5); | |
3438 | sprintf(dfnam, "%s/%s/ts", snappath, newname); | |
025ed0f3 | 3439 | f = fopen(dfnam, "w"); |
f5dd1d53 | 3440 | if (!f) { |
959aee9c | 3441 | ERROR("Failed to open %s", dfnam); |
f5dd1d53 SH |
3442 | return -1; |
3443 | } | |
3444 | if (fprintf(f, "%s", buffer) < 0) { | |
3445 | SYSERROR("Writing timestamp"); | |
3446 | fclose(f); | |
3447 | return -1; | |
3448 | } | |
025ed0f3 | 3449 | ret = fclose(f); |
025ed0f3 | 3450 | if (ret != 0) { |
f5dd1d53 SH |
3451 | SYSERROR("Writing timestamp"); |
3452 | return -1; | |
3453 | } | |
3454 | ||
3455 | if (commentfile) { | |
3456 | // $p / $name / comment \0 | |
3457 | int len = strlen(snappath) + strlen(newname) + 10; | |
3458 | char *path = alloca(len); | |
3459 | sprintf(path, "%s/%s/comment", snappath, newname); | |
3460 | return copy_file(commentfile, path) < 0 ? -1 : i; | |
3461 | } | |
3462 | ||
3463 | return i; | |
3464 | } | |
3465 | ||
858377e4 SH |
3466 | WRAP_API_1(int, lxcapi_snapshot, const char *) |
3467 | ||
f5dd1d53 SH |
3468 | static void lxcsnap_free(struct lxc_snapshot *s) |
3469 | { | |
f10fad2f ME |
3470 | free(s->name); |
3471 | free(s->comment_pathname); | |
3472 | free(s->timestamp); | |
3473 | free(s->lxcpath); | |
f5dd1d53 SH |
3474 | } |
3475 | ||
3476 | static char *get_snapcomment_path(char* snappath, char *name) | |
3477 | { | |
3478 | // $snappath/$name/comment | |
3479 | int ret, len = strlen(snappath) + strlen(name) + 10; | |
3480 | char *s = malloc(len); | |
3481 | ||
3482 | if (s) { | |
3483 | ret = snprintf(s, len, "%s/%s/comment", snappath, name); | |
3484 | if (ret < 0 || ret >= len) { | |
3485 | free(s); | |
3486 | s = NULL; | |
3487 | } | |
3488 | } | |
3489 | return s; | |
3490 | } | |
3491 | ||
3492 | static char *get_timestamp(char* snappath, char *name) | |
3493 | { | |
3494 | char path[MAXPATHLEN], *s = NULL; | |
3495 | int ret, len; | |
3496 | FILE *fin; | |
3497 | ||
3498 | ret = snprintf(path, MAXPATHLEN, "%s/%s/ts", snappath, name); | |
3499 | if (ret < 0 || ret >= MAXPATHLEN) | |
3500 | return NULL; | |
025ed0f3 | 3501 | fin = fopen(path, "r"); |
025ed0f3 | 3502 | if (!fin) |
f5dd1d53 SH |
3503 | return NULL; |
3504 | (void) fseek(fin, 0, SEEK_END); | |
3505 | len = ftell(fin); | |
3506 | (void) fseek(fin, 0, SEEK_SET); | |
3507 | if (len > 0) { | |
3508 | s = malloc(len+1); | |
3509 | if (s) { | |
3510 | s[len] = '\0'; | |
3511 | if (fread(s, 1, len, fin) != len) { | |
3512 | SYSERROR("reading timestamp"); | |
3513 | free(s); | |
3514 | s = NULL; | |
3515 | } | |
3516 | } | |
3517 | } | |
3518 | fclose(fin); | |
3519 | return s; | |
3520 | } | |
3521 | ||
858377e4 | 3522 | static int do_lxcapi_snapshot_list(struct lxc_container *c, struct lxc_snapshot **ret_snaps) |
f5dd1d53 SH |
3523 | { |
3524 | char snappath[MAXPATHLEN], path2[MAXPATHLEN]; | |
18aa217b | 3525 | int count = 0, ret; |
f5dd1d53 SH |
3526 | struct dirent dirent, *direntp; |
3527 | struct lxc_snapshot *snaps =NULL, *nsnaps; | |
3528 | DIR *dir; | |
3529 | ||
3530 | if (!c || !lxcapi_is_defined(c)) | |
3531 | return -1; | |
c868b261 | 3532 | |
18aa217b | 3533 | if (!get_snappath_dir(c, snappath)) { |
f5dd1d53 SH |
3534 | ERROR("path name too long"); |
3535 | return -1; | |
3536 | } | |
025ed0f3 | 3537 | dir = opendir(snappath); |
025ed0f3 | 3538 | if (!dir) { |
f5dd1d53 SH |
3539 | INFO("failed to open %s - assuming no snapshots", snappath); |
3540 | return 0; | |
3541 | } | |
3542 | ||
3543 | while (!readdir_r(dir, &dirent, &direntp)) { | |
3544 | if (!direntp) | |
3545 | break; | |
3546 | ||
3547 | if (!strcmp(direntp->d_name, ".")) | |
3548 | continue; | |
3549 | ||
3550 | if (!strcmp(direntp->d_name, "..")) | |
3551 | continue; | |
3552 | ||
3553 | ret = snprintf(path2, MAXPATHLEN, "%s/%s/config", snappath, direntp->d_name); | |
3554 | if (ret < 0 || ret >= MAXPATHLEN) { | |
3555 | ERROR("pathname too long"); | |
3556 | goto out_free; | |
3557 | } | |
3558 | if (!file_exists(path2)) | |
3559 | continue; | |
3560 | nsnaps = realloc(snaps, (count + 1)*sizeof(*snaps)); | |
3561 | if (!nsnaps) { | |
3562 | SYSERROR("Out of memory"); | |
3563 | goto out_free; | |
3564 | } | |
3565 | snaps = nsnaps; | |
3566 | snaps[count].free = lxcsnap_free; | |
3567 | snaps[count].name = strdup(direntp->d_name); | |
3568 | if (!snaps[count].name) | |
3569 | goto out_free; | |
3570 | snaps[count].lxcpath = strdup(snappath); | |
3571 | if (!snaps[count].lxcpath) { | |
3572 | free(snaps[count].name); | |
3573 | goto out_free; | |
3574 | } | |
3575 | snaps[count].comment_pathname = get_snapcomment_path(snappath, direntp->d_name); | |
3576 | snaps[count].timestamp = get_timestamp(snappath, direntp->d_name); | |
3577 | count++; | |
3578 | } | |
3579 | ||
3580 | if (closedir(dir)) | |
3581 | WARN("failed to close directory"); | |
3582 | ||
3583 | *ret_snaps = snaps; | |
3584 | return count; | |
3585 | ||
3586 | out_free: | |
3587 | if (snaps) { | |
3588 | int i; | |
3589 | for (i=0; i<count; i++) | |
3590 | lxcsnap_free(&snaps[i]); | |
3591 | free(snaps); | |
3592 | } | |
9baa57bd SH |
3593 | if (closedir(dir)) |
3594 | WARN("failed to close directory"); | |
f5dd1d53 SH |
3595 | return -1; |
3596 | } | |
3597 | ||
858377e4 SH |
3598 | WRAP_API_1(int, lxcapi_snapshot_list, struct lxc_snapshot **) |
3599 | ||
3600 | static bool do_lxcapi_snapshot_restore(struct lxc_container *c, const char *snapname, const char *newname) | |
f5dd1d53 SH |
3601 | { |
3602 | char clonelxcpath[MAXPATHLEN]; | |
18aa217b | 3603 | int flags = 0; |
f5dd1d53 SH |
3604 | struct lxc_container *snap, *rest; |
3605 | struct bdev *bdev; | |
3606 | bool b = false; | |
3607 | ||
3608 | if (!c || !c->name || !c->config_path) | |
3609 | return false; | |
3610 | ||
18aa217b SH |
3611 | if (has_fs_snapshots(c)) { |
3612 | ERROR("container rootfs has dependent snapshots"); | |
3613 | return false; | |
3614 | } | |
3615 | ||
76a26f55 | 3616 | bdev = bdev_init(c->lxc_conf, c->lxc_conf->rootfs.path, c->lxc_conf->rootfs.mount, NULL); |
f5dd1d53 SH |
3617 | if (!bdev) { |
3618 | ERROR("Failed to find original backing store type"); | |
3619 | return false; | |
3620 | } | |
3621 | ||
3622 | if (!newname) | |
3623 | newname = c->name; | |
7e36f87e | 3624 | |
18aa217b | 3625 | if (!get_snappath_dir(c, clonelxcpath)) { |
f5dd1d53 SH |
3626 | bdev_put(bdev); |
3627 | return false; | |
3628 | } | |
3629 | // how should we lock this? | |
3630 | ||
3631 | snap = lxc_container_new(snapname, clonelxcpath); | |
3632 | if (!snap || !lxcapi_is_defined(snap)) { | |
3633 | ERROR("Could not open snapshot %s", snapname); | |
3634 | if (snap) lxc_container_put(snap); | |
3635 | bdev_put(bdev); | |
3636 | return false; | |
3637 | } | |
3638 | ||
7e36f87e | 3639 | if (strcmp(c->name, newname) == 0) { |
18aa217b | 3640 | if (!container_destroy(c)) { |
7e36f87e ÇO |
3641 | ERROR("Could not destroy existing container %s", newname); |
3642 | lxc_container_put(snap); | |
3643 | bdev_put(bdev); | |
3644 | return false; | |
3645 | } | |
3646 | } | |
3647 | ||
de269ee8 SH |
3648 | if (strcmp(bdev->type, "dir") != 0 && strcmp(bdev->type, "loop") != 0) |
3649 | flags = LXC_CLONE_SNAPSHOT | LXC_CLONE_MAYBE_SNAPSHOT; | |
3650 | rest = lxcapi_clone(snap, newname, c->config_path, flags, | |
3651 | bdev->type, NULL, 0, NULL); | |
f5dd1d53 SH |
3652 | bdev_put(bdev); |
3653 | if (rest && lxcapi_is_defined(rest)) | |
3654 | b = true; | |
3655 | if (rest) | |
3656 | lxc_container_put(rest); | |
3657 | lxc_container_put(snap); | |
3658 | return b; | |
3659 | } | |
3660 | ||
858377e4 SH |
3661 | WRAP_API_2(bool, lxcapi_snapshot_restore, const char *, const char *) |
3662 | ||
18aa217b | 3663 | static bool do_snapshot_destroy(const char *snapname, const char *clonelxcpath) |
771d96b3 | 3664 | { |
771d96b3 | 3665 | struct lxc_container *snap = NULL; |
18aa217b | 3666 | bool bret = false; |
771d96b3 ÇO |
3667 | |
3668 | snap = lxc_container_new(snapname, clonelxcpath); | |
18aa217b | 3669 | if (!snap) { |
771d96b3 ÇO |
3670 | ERROR("Could not find snapshot %s", snapname); |
3671 | goto err; | |
3672 | } | |
3673 | ||
858377e4 | 3674 | if (!do_lxcapi_destroy(snap)) { |
771d96b3 ÇO |
3675 | ERROR("Could not destroy snapshot %s", snapname); |
3676 | goto err; | |
3677 | } | |
18aa217b | 3678 | bret = true; |
771d96b3 | 3679 | |
771d96b3 ÇO |
3680 | err: |
3681 | if (snap) | |
3682 | lxc_container_put(snap); | |
18aa217b SH |
3683 | return bret; |
3684 | } | |
3685 | ||
3686 | static bool remove_all_snapshots(const char *path) | |
3687 | { | |
3688 | DIR *dir; | |
3689 | struct dirent dirent, *direntp; | |
3690 | bool bret = true; | |
3691 | ||
3692 | dir = opendir(path); | |
3693 | if (!dir) { | |
3694 | SYSERROR("opendir on snapshot path %s", path); | |
3695 | return false; | |
3696 | } | |
3697 | while (!readdir_r(dir, &dirent, &direntp)) { | |
3698 | if (!direntp) | |
3699 | break; | |
3700 | if (!strcmp(direntp->d_name, ".")) | |
3701 | continue; | |
3702 | if (!strcmp(direntp->d_name, "..")) | |
3703 | continue; | |
3704 | if (!do_snapshot_destroy(direntp->d_name, path)) { | |
3705 | bret = false; | |
3706 | continue; | |
3707 | } | |
3708 | } | |
3709 | ||
3710 | closedir(dir); | |
3711 | ||
3712 | if (rmdir(path)) | |
3713 | SYSERROR("Error removing directory %s", path); | |
3714 | ||
3715 | return bret; | |
3716 | } | |
3717 | ||
858377e4 | 3718 | static bool do_lxcapi_snapshot_destroy(struct lxc_container *c, const char *snapname) |
18aa217b SH |
3719 | { |
3720 | char clonelxcpath[MAXPATHLEN]; | |
3721 | ||
3722 | if (!c || !c->name || !c->config_path || !snapname) | |
3723 | return false; | |
3724 | ||
3725 | if (!get_snappath_dir(c, clonelxcpath)) | |
3726 | return false; | |
3727 | ||
3728 | return do_snapshot_destroy(snapname, clonelxcpath); | |
3729 | } | |
3730 | ||
858377e4 SH |
3731 | WRAP_API_1(bool, lxcapi_snapshot_destroy, const char *) |
3732 | ||
3733 | static bool do_lxcapi_snapshot_destroy_all(struct lxc_container *c) | |
18aa217b SH |
3734 | { |
3735 | char clonelxcpath[MAXPATHLEN]; | |
3736 | ||
3737 | if (!c || !c->name || !c->config_path) | |
3738 | return false; | |
3739 | ||
3740 | if (!get_snappath_dir(c, clonelxcpath)) | |
3741 | return false; | |
3742 | ||
3743 | return remove_all_snapshots(clonelxcpath); | |
771d96b3 ÇO |
3744 | } |
3745 | ||
858377e4 SH |
3746 | WRAP_API(bool, lxcapi_snapshot_destroy_all) |
3747 | ||
3748 | static bool do_lxcapi_may_control(struct lxc_container *c) | |
b494d2dd SH |
3749 | { |
3750 | return lxc_try_cmd(c->name, c->config_path) == 0; | |
3751 | } | |
3752 | ||
858377e4 SH |
3753 | WRAP_API(bool, lxcapi_may_control) |
3754 | ||
d5aa23e6 SH |
3755 | static bool do_add_remove_node(pid_t init_pid, const char *path, bool add, |
3756 | struct stat *st) | |
3757 | { | |
3758 | char chrootpath[MAXPATHLEN]; | |
3759 | char *directory_path = NULL; | |
3760 | pid_t pid; | |
3761 | int ret; | |
3762 | ||
3763 | if ((pid = fork()) < 0) { | |
3764 | SYSERROR("failed to fork a child helper"); | |
3765 | return false; | |
3766 | } | |
3767 | if (pid) { | |
3768 | if (wait_for_pid(pid) != 0) { | |
3769 | ERROR("Failed to create note in guest"); | |
3770 | return false; | |
3771 | } | |
3772 | return true; | |
3773 | } | |
3774 | ||
3775 | /* prepare the path */ | |
3776 | ret = snprintf(chrootpath, MAXPATHLEN, "/proc/%d/root", init_pid); | |
3777 | if (ret < 0 || ret >= MAXPATHLEN) | |
3778 | return false; | |
3779 | ||
6b9324bd | 3780 | if (chroot(chrootpath) < 0) |
d5aa23e6 | 3781 | exit(1); |
6b9324bd | 3782 | if (chdir("/") < 0) |
d5aa23e6 SH |
3783 | exit(1); |
3784 | /* remove path if it exists */ | |
3785 | if(faccessat(AT_FDCWD, path, F_OK, AT_SYMLINK_NOFOLLOW) == 0) { | |
3786 | if (unlink(path) < 0) { | |
3787 | ERROR("unlink failed"); | |
3788 | exit(1); | |
3789 | } | |
3790 | } | |
3791 | if (!add) | |
3792 | exit(0); | |
3793 | ||
3794 | /* create any missing directories */ | |
3795 | directory_path = dirname(strdup(path)); | |
3796 | if (mkdir_p(directory_path, 0755) < 0 && errno != EEXIST) { | |
3797 | ERROR("failed to create directory"); | |
3798 | exit(1); | |
3799 | } | |
3800 | ||
3801 | /* create the device node */ | |
3802 | if (mknod(path, st->st_mode, st->st_rdev) < 0) { | |
3803 | ERROR("mknod failed"); | |
3804 | exit(1); | |
3805 | } | |
3806 | ||
3807 | exit(0); | |
3808 | } | |
3809 | ||
f0ca2726 | 3810 | static bool add_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path, bool add) |
a9a0ed90 ÇO |
3811 | { |
3812 | int ret; | |
3813 | struct stat st; | |
a9a0ed90 | 3814 | char value[MAX_BUFFER]; |
f0ca2726 | 3815 | const char *p; |
a9a0ed90 ÇO |
3816 | |
3817 | /* make sure container is running */ | |
858377e4 | 3818 | if (!do_lxcapi_is_running(c)) { |
a9a0ed90 | 3819 | ERROR("container is not running"); |
d5aa23e6 | 3820 | return false; |
a9a0ed90 ÇO |
3821 | } |
3822 | ||
3823 | /* use src_path if dest_path is NULL otherwise use dest_path */ | |
3824 | p = dest_path ? dest_path : src_path; | |
3825 | ||
a9a0ed90 ÇO |
3826 | /* make sure we can access p */ |
3827 | if(access(p, F_OK) < 0 || stat(p, &st) < 0) | |
d5aa23e6 | 3828 | return false; |
a9a0ed90 ÇO |
3829 | |
3830 | /* continue if path is character device or block device */ | |
c6a9b0d7 | 3831 | if (S_ISCHR(st.st_mode)) |
a9a0ed90 | 3832 | ret = snprintf(value, MAX_BUFFER, "c %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
c6a9b0d7 | 3833 | else if (S_ISBLK(st.st_mode)) |
a9a0ed90 ÇO |
3834 | ret = snprintf(value, MAX_BUFFER, "b %d:%d rwm", major(st.st_rdev), minor(st.st_rdev)); |
3835 | else | |
d5aa23e6 | 3836 | return false; |
a9a0ed90 ÇO |
3837 | |
3838 | /* check snprintf return code */ | |
3839 | if (ret < 0 || ret >= MAX_BUFFER) | |
d5aa23e6 | 3840 | return false; |
a9a0ed90 | 3841 | |
858377e4 | 3842 | if (!do_add_remove_node(do_lxcapi_init_pid(c), p, add, &st)) |
d5aa23e6 | 3843 | return false; |
a9a0ed90 | 3844 | |
d5aa23e6 | 3845 | /* add or remove device to/from cgroup access list */ |
a9a0ed90 | 3846 | if (add) { |
858377e4 | 3847 | if (!do_lxcapi_set_cgroup_item(c, "devices.allow", value)) { |
a9a0ed90 | 3848 | ERROR("set_cgroup_item failed while adding the device node"); |
d5aa23e6 | 3849 | return false; |
a9a0ed90 ÇO |
3850 | } |
3851 | } else { | |
858377e4 | 3852 | if (!do_lxcapi_set_cgroup_item(c, "devices.deny", value)) { |
a9a0ed90 | 3853 | ERROR("set_cgroup_item failed while removing the device node"); |
d5aa23e6 | 3854 | return false; |
a9a0ed90 ÇO |
3855 | } |
3856 | } | |
d5aa23e6 | 3857 | |
a9a0ed90 | 3858 | return true; |
a9a0ed90 ÇO |
3859 | } |
3860 | ||
858377e4 | 3861 | static bool do_lxcapi_add_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) |
a9a0ed90 | 3862 | { |
c868b261 ÇO |
3863 | if (am_unpriv()) { |
3864 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3865 | return false; | |
3866 | } | |
a9a0ed90 ÇO |
3867 | return add_remove_device_node(c, src_path, dest_path, true); |
3868 | } | |
3869 | ||
858377e4 SH |
3870 | WRAP_API_2(bool, lxcapi_add_device_node, const char *, const char *) |
3871 | ||
3872 | static bool do_lxcapi_remove_device_node(struct lxc_container *c, const char *src_path, const char *dest_path) | |
a9a0ed90 | 3873 | { |
c868b261 ÇO |
3874 | if (am_unpriv()) { |
3875 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3876 | return false; | |
3877 | } | |
a9a0ed90 ÇO |
3878 | return add_remove_device_node(c, src_path, dest_path, false); |
3879 | } | |
3880 | ||
858377e4 SH |
3881 | WRAP_API_2(bool, lxcapi_remove_device_node, const char *, const char *) |
3882 | ||
3883 | static bool do_lxcapi_attach_interface(struct lxc_container *c, const char *ifname, | |
e58fae8f DY |
3884 | const char *dst_ifname) |
3885 | { | |
3886 | int ret = 0; | |
3887 | if (am_unpriv()) { | |
3888 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3889 | return false; | |
3890 | } | |
3891 | ||
3892 | if (!ifname) { | |
3893 | ERROR("No source interface name given"); | |
3894 | return false; | |
3895 | } | |
3896 | ||
3897 | ret = lxc_netdev_isup(ifname); | |
e58fae8f | 3898 | |
e5848d39 SH |
3899 | if (ret > 0) { |
3900 | /* netdev of ifname is up. */ | |
e58fae8f DY |
3901 | ret = lxc_netdev_down(ifname); |
3902 | if (ret) | |
3903 | goto err; | |
3904 | } | |
3905 | ||
858377e4 | 3906 | ret = lxc_netdev_move_by_name(ifname, do_lxcapi_init_pid(c), dst_ifname); |
e58fae8f DY |
3907 | if (ret) |
3908 | goto err; | |
3909 | ||
3910 | return true; | |
e5848d39 | 3911 | |
e58fae8f | 3912 | err: |
e58fae8f DY |
3913 | return false; |
3914 | } | |
3915 | ||
858377e4 SH |
3916 | WRAP_API_2(bool, lxcapi_attach_interface, const char *, const char *) |
3917 | ||
3918 | static bool do_lxcapi_detach_interface(struct lxc_container *c, const char *ifname, | |
e58fae8f DY |
3919 | const char *dst_ifname) |
3920 | { | |
3921 | pid_t pid, pid_outside; | |
3922 | ||
3923 | if (am_unpriv()) { | |
3924 | ERROR(NOT_SUPPORTED_ERROR, __FUNCTION__); | |
3925 | return false; | |
3926 | } | |
3927 | ||
3928 | if (!ifname) { | |
3929 | ERROR("No source interface name given"); | |
3930 | return false; | |
3931 | } | |
3932 | ||
3933 | pid_outside = getpid(); | |
3934 | pid = fork(); | |
3935 | if (pid < 0) { | |
3936 | ERROR("failed to fork task to get interfaces information"); | |
3937 | return false; | |
3938 | } | |
3939 | ||
3940 | if (pid == 0) { // child | |
3941 | int ret = 0; | |
e0f59189 | 3942 | if (!enter_net_ns(c)) { |
e58fae8f DY |
3943 | ERROR("failed to enter namespace"); |
3944 | exit(-1); | |
3945 | } | |
3946 | ||
3947 | ret = lxc_netdev_isup(ifname); | |
3948 | if (ret < 0) | |
3949 | exit(ret); | |
3950 | ||
3951 | /* netdev of ifname is up. */ | |
3952 | if (ret) { | |
3953 | ret = lxc_netdev_down(ifname); | |
3954 | if (ret) | |
3955 | exit(ret); | |
3956 | } | |
3957 | ||
3958 | ret = lxc_netdev_move_by_name(ifname, pid_outside, dst_ifname); | |
3959 | ||
3960 | /* -EINVAL means there is no netdev named as ifanme. */ | |
3961 | if (ret == -EINVAL) { | |
3962 | ERROR("No network device named as %s.", ifname); | |
3963 | } | |
3964 | exit(ret); | |
3965 | } | |
3966 | ||
3967 | if (wait_for_pid(pid) != 0) | |
3968 | return false; | |
3969 | ||
3970 | return true; | |
3971 | } | |
3972 | ||
858377e4 SH |
3973 | WRAP_API_2(bool, lxcapi_detach_interface, const char *, const char *) |
3974 | ||
3975 | static bool do_lxcapi_checkpoint(struct lxc_container *c, char *directory, bool stop, bool verbose) | |
bbd4e13e TA |
3976 | { |
3977 | pid_t pid; | |
3978 | int status; | |
85c50991 | 3979 | char path[PATH_MAX]; |
bbd4e13e TA |
3980 | |
3981 | if (!criu_ok(c)) | |
3982 | return false; | |
3983 | ||
3984 | if (mkdir(directory, 0700) < 0 && errno != EEXIST) | |
3985 | return false; | |
3986 | ||
85c50991 TA |
3987 | status = snprintf(path, sizeof(path), "%s/inventory.img", directory); |
3988 | if (status < 0 || status >= sizeof(path)) | |
3989 | return false; | |
3990 | ||
3991 | if (access(path, F_OK) == 0) { | |
3992 | ERROR("please use a fresh directory for the dump directory\n"); | |
3993 | return false; | |
3994 | } | |
3995 | ||
735f2c6e TA |
3996 | pid = fork(); |
3997 | if (pid < 0) | |
3998 | return false; | |
3999 | ||
4000 | if (pid == 0) { | |
4001 | struct criu_opts os; | |
4002 | ||
4003 | os.action = "dump"; | |
4004 | os.directory = directory; | |
4005 | os.c = c; | |
4006 | os.stop = stop; | |
4007 | os.verbose = verbose; | |
4008 | ||
4009 | /* exec_criu() returning is an error */ | |
4010 | exec_criu(&os); | |
4011 | exit(1); | |
4012 | } else { | |
4013 | pid_t w = waitpid(pid, &status, 0); | |
4014 | if (w == -1) { | |
3fdf4a73 | 4015 | SYSERROR("waitpid"); |
735f2c6e TA |
4016 | return false; |
4017 | } | |
4018 | ||
4019 | if (WIFEXITED(status)) { | |
4020 | return !WEXITSTATUS(status); | |
4021 | } | |
4022 | ||
4023 | return false; | |
4024 | } | |
4025 | } | |
4026 | ||
858377e4 SH |
4027 | WRAP_API_3(bool, lxcapi_checkpoint, char *, bool, bool) |
4028 | ||
4029 | static bool do_lxcapi_restore(struct lxc_container *c, char *directory, bool verbose) | |
c9d8f2ee TA |
4030 | { |
4031 | pid_t pid; | |
4032 | int status, nread; | |
4033 | int pipefd[2]; | |
4034 | ||
4035 | if (!criu_ok(c)) | |
4036 | return false; | |
4037 | ||
4038 | if (geteuid()) { | |
4039 | ERROR("Must be root to restore\n"); | |
4040 | return false; | |
4041 | } | |
4042 | ||
4043 | if (pipe(pipefd)) { | |
4044 | ERROR("failed to create pipe"); | |
4045 | return false; | |
4046 | } | |
4047 | ||
4048 | pid = fork(); | |
4049 | if (pid < 0) { | |
4050 | close(pipefd[0]); | |
4051 | close(pipefd[1]); | |
4052 | return false; | |
4053 | } | |
4054 | ||
4055 | if (pid == 0) { | |
4056 | close(pipefd[0]); | |
4057 | // this never returns | |
4058 | do_restore(c, pipefd[1], directory, verbose); | |
4059 | } | |
4060 | ||
4061 | close(pipefd[1]); | |
4062 | ||
4063 | nread = read(pipefd[0], &status, sizeof(status)); | |
4064 | close(pipefd[0]); | |
4065 | if (sizeof(status) != nread) { | |
4066 | ERROR("reading status from pipe failed"); | |
4067 | goto err_wait; | |
4068 | } | |
4069 | ||
4070 | // If the criu process was killed or exited nonzero, wait() for the | |
4071 | // handler, since the restore process died. Otherwise, we don't need to | |
4072 | // wait, since the child becomes the monitor process. | |
4073 | if (!WIFEXITED(status) || WEXITSTATUS(status)) | |
4074 | goto err_wait; | |
4075 | return true; | |
4076 | ||
4077 | err_wait: | |
4078 | if (wait_for_pid(pid)) | |
4079 | ERROR("restore process died"); | |
4080 | return false; | |
735f2c6e TA |
4081 | } |
4082 | ||
858377e4 SH |
4083 | WRAP_API_2(bool, lxcapi_restore, char *, bool) |
4084 | ||
a0e93eeb CS |
4085 | static int lxcapi_attach_run_waitl(struct lxc_container *c, lxc_attach_options_t *options, const char *program, const char *arg, ...) |
4086 | { | |
4087 | va_list ap; | |
4088 | const char **argv; | |
4089 | int ret; | |
4090 | ||
4091 | if (!c) | |
4092 | return -1; | |
4093 | ||
858377e4 SH |
4094 | current_config = c->lxc_conf; |
4095 | ||
a0e93eeb CS |
4096 | va_start(ap, arg); |
4097 | argv = lxc_va_arg_list_to_argv_const(ap, 1); | |
4098 | va_end(ap); | |
4099 | ||
4100 | if (!argv) { | |
4101 | ERROR("Memory allocation error."); | |
858377e4 SH |
4102 | ret = -1; |
4103 | goto out; | |
a0e93eeb CS |
4104 | } |
4105 | argv[0] = arg; | |
4106 | ||
858377e4 | 4107 | ret = do_lxcapi_attach_run_wait(c, options, program, (const char * const *)argv); |
a0e93eeb | 4108 | free((void*)argv); |
858377e4 SH |
4109 | out: |
4110 | current_config = NULL; | |
a0e93eeb CS |
4111 | return ret; |
4112 | } | |
4113 | ||
afeecbba | 4114 | struct lxc_container *lxc_container_new(const char *name, const char *configpath) |
72d0e1cb SG |
4115 | { |
4116 | struct lxc_container *c; | |
72d0e1cb | 4117 | |
18aa217b SH |
4118 | if (!name) |
4119 | return NULL; | |
4120 | ||
72d0e1cb SG |
4121 | c = malloc(sizeof(*c)); |
4122 | if (!c) { | |
4123 | fprintf(stderr, "failed to malloc lxc_container\n"); | |
4124 | return NULL; | |
4125 | } | |
4126 | memset(c, 0, sizeof(*c)); | |
4127 | ||
afeecbba SH |
4128 | if (configpath) |
4129 | c->config_path = strdup(configpath); | |
4130 | else | |
593e8478 | 4131 | c->config_path = strdup(lxc_global_config_value("lxc.lxcpath")); |
afeecbba | 4132 | |
2a59a681 | 4133 | if (!c->config_path) { |
03fadd16 | 4134 | fprintf(stderr, "Out of memory\n"); |
2a59a681 SH |
4135 | goto err; |
4136 | } | |
4137 | ||
f5dd1d53 | 4138 | remove_trailing_slashes(c->config_path); |
72d0e1cb SG |
4139 | c->name = malloc(strlen(name)+1); |
4140 | if (!c->name) { | |
4141 | fprintf(stderr, "Error allocating lxc_container name\n"); | |
4142 | goto err; | |
4143 | } | |
4144 | strcpy(c->name, name); | |
4145 | ||
4146 | c->numthreads = 1; | |
df271a59 | 4147 | if (!(c->slock = lxc_newlock(c->config_path, name))) { |
72d0e1cb SG |
4148 | fprintf(stderr, "failed to create lock\n"); |
4149 | goto err; | |
4150 | } | |
4151 | ||
df271a59 | 4152 | if (!(c->privlock = lxc_newlock(NULL, NULL))) { |
72d0e1cb SG |
4153 | fprintf(stderr, "failed to alloc privlock\n"); |
4154 | goto err; | |
4155 | } | |
4156 | ||
afeecbba | 4157 | if (!set_config_filename(c)) { |
72d0e1cb SG |
4158 | fprintf(stderr, "Error allocating config file pathname\n"); |
4159 | goto err; | |
4160 | } | |
72d0e1cb | 4161 | |
bac806d1 SH |
4162 | if (file_exists(c->configfile) && !lxcapi_load_config(c, NULL)) |
4163 | goto err; | |
72d0e1cb | 4164 | |
3e625e2d SH |
4165 | if (ongoing_create(c) == 2) { |
4166 | ERROR("Error: %s creation was not completed", c->name); | |
18aa217b | 4167 | container_destroy(c); |
4df7f012 | 4168 | lxcapi_clear_config(c); |
3e625e2d | 4169 | } |
a2739df5 | 4170 | c->daemonize = true; |
72cf75fa | 4171 | c->pidfile = NULL; |
3e625e2d | 4172 | |
72d0e1cb SG |
4173 | // assign the member functions |
4174 | c->is_defined = lxcapi_is_defined; | |
4175 | c->state = lxcapi_state; | |
4176 | c->is_running = lxcapi_is_running; | |
4177 | c->freeze = lxcapi_freeze; | |
4178 | c->unfreeze = lxcapi_unfreeze; | |
0115f8fd | 4179 | c->console = lxcapi_console; |
b5159817 | 4180 | c->console_getfd = lxcapi_console_getfd; |
72d0e1cb SG |
4181 | c->init_pid = lxcapi_init_pid; |
4182 | c->load_config = lxcapi_load_config; | |
4183 | c->want_daemonize = lxcapi_want_daemonize; | |
130a1888 | 4184 | c->want_close_all_fds = lxcapi_want_close_all_fds; |
72d0e1cb SG |
4185 | c->start = lxcapi_start; |
4186 | c->startl = lxcapi_startl; | |
4187 | c->stop = lxcapi_stop; | |
4188 | c->config_file_name = lxcapi_config_file_name; | |
4189 | c->wait = lxcapi_wait; | |
4190 | c->set_config_item = lxcapi_set_config_item; | |
4191 | c->destroy = lxcapi_destroy; | |
18aa217b | 4192 | c->destroy_with_snapshots = lxcapi_destroy_with_snapshots; |
06e5650e | 4193 | c->rename = lxcapi_rename; |
72d0e1cb SG |
4194 | c->save_config = lxcapi_save_config; |
4195 | c->get_keys = lxcapi_get_keys; | |
4196 | c->create = lxcapi_create; | |
4197 | c->createl = lxcapi_createl; | |
4198 | c->shutdown = lxcapi_shutdown; | |
3e625e2d | 4199 | c->reboot = lxcapi_reboot; |
4df7f012 | 4200 | c->clear_config = lxcapi_clear_config; |
72d0e1cb SG |
4201 | c->clear_config_item = lxcapi_clear_config_item; |
4202 | c->get_config_item = lxcapi_get_config_item; | |
8ac18377 | 4203 | c->get_running_config_item = lxcapi_get_running_config_item; |
794dd120 SH |
4204 | c->get_cgroup_item = lxcapi_get_cgroup_item; |
4205 | c->set_cgroup_item = lxcapi_set_cgroup_item; | |
2a59a681 SH |
4206 | c->get_config_path = lxcapi_get_config_path; |
4207 | c->set_config_path = lxcapi_set_config_path; | |
9be53773 | 4208 | c->clone = lxcapi_clone; |
799f29ab | 4209 | c->get_interfaces = lxcapi_get_interfaces; |
9c83a661 | 4210 | c->get_ips = lxcapi_get_ips; |
a0e93eeb CS |
4211 | c->attach = lxcapi_attach; |
4212 | c->attach_run_wait = lxcapi_attach_run_wait; | |
4213 | c->attach_run_waitl = lxcapi_attach_run_waitl; | |
f5dd1d53 SH |
4214 | c->snapshot = lxcapi_snapshot; |
4215 | c->snapshot_list = lxcapi_snapshot_list; | |
4216 | c->snapshot_restore = lxcapi_snapshot_restore; | |
771d96b3 | 4217 | c->snapshot_destroy = lxcapi_snapshot_destroy; |
18aa217b | 4218 | c->snapshot_destroy_all = lxcapi_snapshot_destroy_all; |
b494d2dd | 4219 | c->may_control = lxcapi_may_control; |
a9a0ed90 ÇO |
4220 | c->add_device_node = lxcapi_add_device_node; |
4221 | c->remove_device_node = lxcapi_remove_device_node; | |
e58fae8f DY |
4222 | c->attach_interface = lxcapi_attach_interface; |
4223 | c->detach_interface = lxcapi_detach_interface; | |
735f2c6e TA |
4224 | c->checkpoint = lxcapi_checkpoint; |
4225 | c->restore = lxcapi_restore; | |
72d0e1cb | 4226 | |
72d0e1cb SG |
4227 | return c; |
4228 | ||
4229 | err: | |
4230 | lxc_container_free(c); | |
4231 | return NULL; | |
4232 | } | |
4233 | ||
4a7c7daa | 4234 | int lxc_get_wait_states(const char **states) |
72d0e1cb SG |
4235 | { |
4236 | int i; | |
4237 | ||
4238 | if (states) | |
4239 | for (i=0; i<MAX_STATE; i++) | |
4240 | states[i] = lxc_state2str(i); | |
4241 | return MAX_STATE; | |
4242 | } | |
a41f104b | 4243 | |
a41f104b SH |
4244 | /* |
4245 | * These next two could probably be done smarter with reusing a common function | |
4246 | * with different iterators and tests... | |
4247 | */ | |
4248 | int list_defined_containers(const char *lxcpath, char ***names, struct lxc_container ***cret) | |
4249 | { | |
4250 | DIR *dir; | |
4251 | int i, cfound = 0, nfound = 0; | |
4252 | struct dirent dirent, *direntp; | |
4253 | struct lxc_container *c; | |
4254 | ||
4255 | if (!lxcpath) | |
593e8478 | 4256 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b | 4257 | |
a41f104b | 4258 | dir = opendir(lxcpath); |
a41f104b SH |
4259 | if (!dir) { |
4260 | SYSERROR("opendir on lxcpath"); | |
4261 | return -1; | |
4262 | } | |
4263 | ||
4264 | if (cret) | |
4265 | *cret = NULL; | |
4266 | if (names) | |
4267 | *names = NULL; | |
4268 | ||
4269 | while (!readdir_r(dir, &dirent, &direntp)) { | |
4270 | if (!direntp) | |
4271 | break; | |
4272 | if (!strcmp(direntp->d_name, ".")) | |
4273 | continue; | |
4274 | if (!strcmp(direntp->d_name, "..")) | |
4275 | continue; | |
4276 | ||
4277 | if (!config_file_exists(lxcpath, direntp->d_name)) | |
4278 | continue; | |
4279 | ||
4280 | if (names) { | |
9c88ff1f | 4281 | if (!add_to_array(names, direntp->d_name, cfound)) |
a41f104b SH |
4282 | goto free_bad; |
4283 | } | |
4284 | cfound++; | |
4285 | ||
4286 | if (!cret) { | |
4287 | nfound++; | |
4288 | continue; | |
4289 | } | |
4290 | ||
4291 | c = lxc_container_new(direntp->d_name, lxcpath); | |
4292 | if (!c) { | |
4293 | INFO("Container %s:%s has a config but could not be loaded", | |
4294 | lxcpath, direntp->d_name); | |
4295 | if (names) | |
9c88ff1f ÇO |
4296 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4297 | goto free_bad; | |
a41f104b SH |
4298 | continue; |
4299 | } | |
858377e4 | 4300 | if (!do_lxcapi_is_defined(c)) { |
a41f104b SH |
4301 | INFO("Container %s:%s has a config but is not defined", |
4302 | lxcpath, direntp->d_name); | |
4303 | if (names) | |
9c88ff1f ÇO |
4304 | if(!remove_from_array(names, direntp->d_name, cfound--)) |
4305 | goto free_bad; | |
a41f104b SH |
4306 | lxc_container_put(c); |
4307 | continue; | |
4308 | } | |
4309 | ||
2871830a | 4310 | if (!add_to_clist(cret, c, nfound, true)) { |
a41f104b SH |
4311 | lxc_container_put(c); |
4312 | goto free_bad; | |
4313 | } | |
4314 | nfound++; | |
4315 | } | |
4316 | ||
a41f104b | 4317 | closedir(dir); |
a41f104b SH |
4318 | return nfound; |
4319 | ||
4320 | free_bad: | |
4321 | if (names && *names) { | |
4322 | for (i=0; i<cfound; i++) | |
4323 | free((*names)[i]); | |
4324 | free(*names); | |
4325 | } | |
4326 | if (cret && *cret) { | |
4327 | for (i=0; i<nfound; i++) | |
4328 | lxc_container_put((*cret)[i]); | |
4329 | free(*cret); | |
4330 | } | |
a41f104b | 4331 | closedir(dir); |
a41f104b SH |
4332 | return -1; |
4333 | } | |
4334 | ||
148a9d27 DE |
4335 | int list_active_containers(const char *lxcpath, char ***nret, |
4336 | struct lxc_container ***cret) | |
a41f104b | 4337 | { |
148a9d27 | 4338 | int i, ret = -1, cret_cnt = 0, ct_name_cnt = 0; |
a41f104b SH |
4339 | int lxcpath_len; |
4340 | char *line = NULL; | |
148a9d27 | 4341 | char **ct_name = NULL; |
a41f104b SH |
4342 | size_t len = 0; |
4343 | struct lxc_container *c; | |
88556fd7 | 4344 | bool is_hashed; |
a41f104b SH |
4345 | |
4346 | if (!lxcpath) | |
593e8478 | 4347 | lxcpath = lxc_global_config_value("lxc.lxcpath"); |
a41f104b SH |
4348 | lxcpath_len = strlen(lxcpath); |
4349 | ||
4350 | if (cret) | |
4351 | *cret = NULL; | |
148a9d27 DE |
4352 | if (nret) |
4353 | *nret = NULL; | |
a41f104b | 4354 | |
a41f104b | 4355 | FILE *f = fopen("/proc/net/unix", "r"); |
a41f104b SH |
4356 | if (!f) |
4357 | return -1; | |
4358 | ||
4359 | while (getline(&line, &len, f) != -1) { | |
88556fd7 | 4360 | |
0f8f9c8a | 4361 | char *p = strrchr(line, ' '), *p2; |
a41f104b SH |
4362 | if (!p) |
4363 | continue; | |
4364 | p++; | |
4365 | if (*p != 0x40) | |
4366 | continue; | |
4367 | p++; | |
88556fd7 ÇO |
4368 | |
4369 | is_hashed = false; | |
4370 | if (strncmp(p, lxcpath, lxcpath_len) == 0) { | |
4371 | p += lxcpath_len; | |
4372 | } else if (strncmp(p, "lxc/", 4) == 0) { | |
4373 | p += 4; | |
4374 | is_hashed = true; | |
4375 | } else { | |
a41f104b | 4376 | continue; |
88556fd7 ÇO |
4377 | } |
4378 | ||
a41f104b SH |
4379 | while (*p == '/') |
4380 | p++; | |
4381 | ||
4382 | // Now p is the start of lxc_name | |
46cd2845 | 4383 | p2 = strchr(p, '/'); |
a41f104b SH |
4384 | if (!p2 || strncmp(p2, "/command", 8) != 0) |
4385 | continue; | |
4386 | *p2 = '\0'; | |
4387 | ||
88556fd7 ÇO |
4388 | if (is_hashed) { |
4389 | if (strncmp(lxcpath, lxc_cmd_get_lxcpath(p), lxcpath_len) != 0) | |
4390 | continue; | |
4391 | p = lxc_cmd_get_name(p); | |
4392 | } | |
4393 | ||
148a9d27 | 4394 | if (array_contains(&ct_name, p, ct_name_cnt)) |
9c88ff1f ÇO |
4395 | continue; |
4396 | ||
148a9d27 DE |
4397 | if (!add_to_array(&ct_name, p, ct_name_cnt)) |
4398 | goto free_cret_list; | |
9c88ff1f | 4399 | |
148a9d27 | 4400 | ct_name_cnt++; |
a41f104b | 4401 | |
148a9d27 | 4402 | if (!cret) |
a41f104b | 4403 | continue; |
a41f104b SH |
4404 | |
4405 | c = lxc_container_new(p, lxcpath); | |
4406 | if (!c) { | |
4407 | INFO("Container %s:%s is running but could not be loaded", | |
4408 | lxcpath, p); | |
148a9d27 | 4409 | remove_from_array(&ct_name, p, ct_name_cnt--); |
a41f104b SH |
4410 | continue; |
4411 | } | |
4412 | ||
4413 | /* | |
4414 | * If this is an anonymous container, then is_defined *can* | |
4415 | * return false. So we don't do that check. Count on the | |
4416 | * fact that the command socket exists. | |
4417 | */ | |
4418 | ||
148a9d27 | 4419 | if (!add_to_clist(cret, c, cret_cnt, true)) { |
a41f104b | 4420 | lxc_container_put(c); |
148a9d27 | 4421 | goto free_cret_list; |
a41f104b | 4422 | } |
148a9d27 | 4423 | cret_cnt++; |
a41f104b SH |
4424 | } |
4425 | ||
148a9d27 DE |
4426 | assert(!nret || !cret || cret_cnt == ct_name_cnt); |
4427 | ret = ct_name_cnt; | |
4428 | if (nret) | |
4429 | *nret = ct_name; | |
4430 | else | |
4431 | goto free_ct_name; | |
4432 | goto out; | |
a41f104b | 4433 | |
148a9d27 | 4434 | free_cret_list: |
a41f104b | 4435 | if (cret && *cret) { |
148a9d27 | 4436 | for (i = 0; i < cret_cnt; i++) |
a41f104b SH |
4437 | lxc_container_put((*cret)[i]); |
4438 | free(*cret); | |
4439 | } | |
148a9d27 DE |
4440 | |
4441 | free_ct_name: | |
4442 | if (ct_name) { | |
4443 | for (i = 0; i < ct_name_cnt; i++) | |
4444 | free(ct_name[i]); | |
4445 | free(ct_name); | |
4446 | } | |
4447 | ||
4448 | out: | |
f10fad2f | 4449 | free(line); |
e853a32d | 4450 | |
a41f104b | 4451 | fclose(f); |
148a9d27 | 4452 | return ret; |
a41f104b | 4453 | } |
2871830a DE |
4454 | |
4455 | int list_all_containers(const char *lxcpath, char ***nret, | |
4456 | struct lxc_container ***cret) | |
4457 | { | |
4458 | int i, ret, active_cnt, ct_cnt, ct_list_cnt; | |
4459 | char **active_name; | |
4460 | char **ct_name; | |
4461 | struct lxc_container **ct_list = NULL; | |
4462 | ||
4463 | ct_cnt = list_defined_containers(lxcpath, &ct_name, NULL); | |
4464 | if (ct_cnt < 0) | |
4465 | return ct_cnt; | |
4466 | ||
4467 | active_cnt = list_active_containers(lxcpath, &active_name, NULL); | |
4468 | if (active_cnt < 0) { | |
4469 | ret = active_cnt; | |
4470 | goto free_ct_name; | |
4471 | } | |
4472 | ||
4473 | for (i = 0; i < active_cnt; i++) { | |
4474 | if (!array_contains(&ct_name, active_name[i], ct_cnt)) { | |
4475 | if (!add_to_array(&ct_name, active_name[i], ct_cnt)) { | |
4476 | ret = -1; | |
4477 | goto free_active_name; | |
4478 | } | |
4479 | ct_cnt++; | |
4480 | } | |
4481 | free(active_name[i]); | |
4482 | active_name[i] = NULL; | |
4483 | } | |
4484 | free(active_name); | |
4485 | active_name = NULL; | |
4486 | active_cnt = 0; | |
4487 | ||
4488 | for (i = 0, ct_list_cnt = 0; i < ct_cnt && cret; i++) { | |
4489 | struct lxc_container *c; | |
4490 | ||
4491 | c = lxc_container_new(ct_name[i], lxcpath); | |
4492 | if (!c) { | |
4493 | WARN("Container %s:%s could not be loaded", lxcpath, ct_name[i]); | |
4494 | remove_from_array(&ct_name, ct_name[i], ct_cnt--); | |
4495 | continue; | |
4496 | } | |
4497 | ||
4498 | if (!add_to_clist(&ct_list, c, ct_list_cnt, false)) { | |
4499 | lxc_container_put(c); | |
4500 | ret = -1; | |
4501 | goto free_ct_list; | |
4502 | } | |
4503 | ct_list_cnt++; | |
4504 | } | |
4505 | ||
4506 | if (cret) | |
4507 | *cret = ct_list; | |
4508 | ||
4509 | if (nret) | |
4510 | *nret = ct_name; | |
4511 | else { | |
4512 | ret = ct_cnt; | |
4513 | goto free_ct_name; | |
4514 | } | |
4515 | return ct_cnt; | |
4516 | ||
4517 | free_ct_list: | |
4518 | for (i = 0; i < ct_list_cnt; i++) { | |
4519 | lxc_container_put(ct_list[i]); | |
4520 | } | |
f10fad2f | 4521 | free(ct_list); |
2871830a DE |
4522 | |
4523 | free_active_name: | |
4524 | for (i = 0; i < active_cnt; i++) { | |
f10fad2f | 4525 | free(active_name[i]); |
2871830a | 4526 | } |
f10fad2f | 4527 | free(active_name); |
2871830a DE |
4528 | |
4529 | free_ct_name: | |
4530 | for (i = 0; i < ct_cnt; i++) { | |
4531 | free(ct_name[i]); | |
4532 | } | |
4533 | free(ct_name); | |
4534 | return ret; | |
4535 | } |