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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
cd61c3bf LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
a8fbdf54 TA |
21 | #include <dirent.h> |
22 | #include <errno.h> | |
ebd93cb6 | 23 | #include <fcntl.h> |
a8fbdf54 TA |
24 | #include <stdio.h> |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
e306723e | 27 | #include <sys/file.h> |
a8fbdf54 TA |
28 | #include <sys/stat.h> |
29 | #include <unistd.h> | |
8e0b6570 | 30 | #include <linux/fs.h> |
546dbec5 | 31 | |
b5efdb8a | 32 | #include "alloc-util.h" |
cd61c3bf | 33 | #include "btrfs-util.h" |
c8b3094d | 34 | #include "chattr-util.h" |
ebd93cb6 | 35 | #include "copy.h" |
a0956174 | 36 | #include "dirent-util.h" |
c7664c07 | 37 | #include "dissect-image.h" |
b6e953f2 | 38 | #include "env-util.h" |
3ffd4af2 | 39 | #include "fd-util.h" |
c7664c07 | 40 | #include "fileio.h" |
f4f15635 | 41 | #include "fs-util.h" |
a8fbdf54 | 42 | #include "hashmap.h" |
c7664c07 LP |
43 | #include "hostname-util.h" |
44 | #include "id128-util.h" | |
a8fbdf54 TA |
45 | #include "lockfile-util.h" |
46 | #include "log.h" | |
c7664c07 | 47 | #include "loop-util.h" |
3ffd4af2 | 48 | #include "machine-image.h" |
546dbec5 | 49 | #include "macro.h" |
30535c16 | 50 | #include "mkdir.h" |
8e0b6570 | 51 | #include "path-util.h" |
c6878637 | 52 | #include "rm-rf.h" |
8b43440b | 53 | #include "string-table.h" |
07630cea | 54 | #include "string-util.h" |
8e0b6570 | 55 | #include "strv.h" |
a8fbdf54 | 56 | #include "time-util.h" |
8e0b6570 | 57 | #include "utf8.h" |
a8fbdf54 | 58 | #include "util.h" |
89a5a90c | 59 | #include "xattr-util.h" |
cd61c3bf | 60 | |
c2ce6a3d | 61 | static const char image_search_path[] = |
42c6f2c9 | 62 | "/var/lib/machines\0" |
7d105503 | 63 | "/var/lib/container\0" /* legacy */ |
42c6f2c9 LP |
64 | "/usr/local/lib/machines\0" |
65 | "/usr/lib/machines\0"; | |
c2ce6a3d | 66 | |
cd61c3bf LP |
67 | Image *image_unref(Image *i) { |
68 | if (!i) | |
69 | return NULL; | |
70 | ||
71 | free(i->name); | |
72 | free(i->path); | |
c7664c07 LP |
73 | |
74 | free(i->hostname); | |
75 | strv_free(i->machine_info); | |
76 | strv_free(i->os_release); | |
77 | ||
6b430fdb | 78 | return mfree(i); |
cd61c3bf LP |
79 | } |
80 | ||
8e0b6570 LP |
81 | static char **image_settings_path(Image *image) { |
82 | _cleanup_strv_free_ char **l = NULL; | |
8e0b6570 LP |
83 | const char *fn, *s; |
84 | unsigned i = 0; | |
85 | ||
86 | assert(image); | |
87 | ||
88 | l = new0(char*, 4); | |
89 | if (!l) | |
90 | return NULL; | |
91 | ||
92 | fn = strjoina(image->name, ".nspawn"); | |
93 | ||
94 | FOREACH_STRING(s, "/etc/systemd/nspawn/", "/run/systemd/nspawn/") { | |
95 | l[i] = strappend(s, fn); | |
96 | if (!l[i]) | |
97 | return NULL; | |
98 | ||
99 | i++; | |
100 | } | |
101 | ||
102 | l[i] = file_in_same_dir(image->path, fn); | |
103 | if (!l[i]) | |
104 | return NULL; | |
105 | ||
ae2a15bc | 106 | return TAKE_PTR(l); |
8e0b6570 LP |
107 | } |
108 | ||
bafbac4e LP |
109 | static char *image_roothash_path(Image *image) { |
110 | const char *fn; | |
111 | ||
112 | assert(image); | |
113 | ||
114 | fn = strjoina(image->name, ".roothash"); | |
115 | ||
116 | return file_in_same_dir(image->path, fn); | |
117 | } | |
118 | ||
c2ce6a3d | 119 | static int image_new( |
cd61c3bf | 120 | ImageType t, |
5fc7f358 | 121 | const char *pretty, |
cd61c3bf | 122 | const char *path, |
5fc7f358 | 123 | const char *filename, |
cd61c3bf | 124 | bool read_only, |
10f9c755 | 125 | usec_t crtime, |
cd61c3bf | 126 | usec_t mtime, |
c2ce6a3d | 127 | Image **ret) { |
cd61c3bf LP |
128 | |
129 | _cleanup_(image_unrefp) Image *i = NULL; | |
cd61c3bf | 130 | |
cd61c3bf LP |
131 | assert(t >= 0); |
132 | assert(t < _IMAGE_TYPE_MAX); | |
5fc7f358 LP |
133 | assert(pretty); |
134 | assert(filename); | |
c2ce6a3d | 135 | assert(ret); |
cd61c3bf | 136 | |
c2ce6a3d | 137 | i = new0(Image, 1); |
cd61c3bf LP |
138 | if (!i) |
139 | return -ENOMEM; | |
140 | ||
141 | i->type = t; | |
142 | i->read_only = read_only; | |
10f9c755 | 143 | i->crtime = crtime; |
cd61c3bf | 144 | i->mtime = mtime; |
c19de711 | 145 | i->usage = i->usage_exclusive = (uint64_t) -1; |
b6b18498 | 146 | i->limit = i->limit_exclusive = (uint64_t) -1; |
cd61c3bf | 147 | |
5fc7f358 | 148 | i->name = strdup(pretty); |
cd61c3bf LP |
149 | if (!i->name) |
150 | return -ENOMEM; | |
151 | ||
5fc7f358 | 152 | if (path) |
605405c6 | 153 | i->path = strjoin(path, "/", filename); |
5fc7f358 LP |
154 | else |
155 | i->path = strdup(filename); | |
ebeccf9e | 156 | |
5fc7f358 LP |
157 | if (!i->path) |
158 | return -ENOMEM; | |
159 | ||
160 | path_kill_slashes(i->path); | |
cd61c3bf | 161 | |
1cc6c93a | 162 | *ret = TAKE_PTR(i); |
c2ce6a3d | 163 | |
cd61c3bf LP |
164 | return 0; |
165 | } | |
166 | ||
5fc7f358 LP |
167 | static int image_make( |
168 | const char *pretty, | |
169 | int dfd, | |
170 | const char *path, | |
171 | const char *filename, | |
172 | Image **ret) { | |
173 | ||
c2ce6a3d | 174 | struct stat st; |
5fc7f358 | 175 | bool read_only; |
cd61c3bf LP |
176 | int r; |
177 | ||
5fc7f358 | 178 | assert(filename); |
cd61c3bf | 179 | |
eb38edce LP |
180 | /* We explicitly *do* follow symlinks here, since we want to allow symlinking trees, raw files and block |
181 | * devices into /var/lib/machines/, and treat them normally. */ | |
cd61c3bf | 182 | |
5fc7f358 | 183 | if (fstatat(dfd, filename, &st, 0) < 0) |
c2ce6a3d | 184 | return -errno; |
cd61c3bf | 185 | |
5fc7f358 LP |
186 | read_only = |
187 | (path && path_startswith(path, "/usr")) || | |
08ff5529 | 188 | (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS); |
86e339c8 | 189 | |
c2ce6a3d | 190 | if (S_ISDIR(st.st_mode)) { |
01b72568 LP |
191 | _cleanup_close_ int fd = -1; |
192 | unsigned file_attr = 0; | |
cd61c3bf | 193 | |
c2ce6a3d LP |
194 | if (!ret) |
195 | return 1; | |
cd61c3bf | 196 | |
5fc7f358 LP |
197 | if (!pretty) |
198 | pretty = filename; | |
199 | ||
01b72568 LP |
200 | fd = openat(dfd, filename, O_CLOEXEC|O_NOCTTY|O_DIRECTORY); |
201 | if (fd < 0) | |
202 | return -errno; | |
203 | ||
c2ce6a3d LP |
204 | /* btrfs subvolumes have inode 256 */ |
205 | if (st.st_ino == 256) { | |
cd61c3bf | 206 | |
21222ea5 LP |
207 | r = btrfs_is_filesystem(fd); |
208 | if (r < 0) | |
209 | return r; | |
210 | if (r) { | |
10f9c755 | 211 | BtrfsSubvolInfo info; |
cd61c3bf | 212 | |
c2ce6a3d | 213 | /* It's a btrfs subvolume */ |
cd61c3bf | 214 | |
5bcd08db | 215 | r = btrfs_subvol_get_info_fd(fd, 0, &info); |
10f9c755 LP |
216 | if (r < 0) |
217 | return r; | |
c2ce6a3d LP |
218 | |
219 | r = image_new(IMAGE_SUBVOLUME, | |
5fc7f358 | 220 | pretty, |
c2ce6a3d | 221 | path, |
5fc7f358 LP |
222 | filename, |
223 | info.read_only || read_only, | |
10f9c755 | 224 | info.otime, |
c2ce6a3d | 225 | 0, |
c2ce6a3d LP |
226 | ret); |
227 | if (r < 0) | |
228 | return r; | |
229 | ||
5bcd08db LP |
230 | if (btrfs_quota_scan_ongoing(fd) == 0) { |
231 | BtrfsQuotaInfo quota; | |
b6b18498 | 232 | |
5bcd08db LP |
233 | r = btrfs_subvol_get_subtree_quota_fd(fd, 0, "a); |
234 | if (r >= 0) { | |
235 | (*ret)->usage = quota.referenced; | |
236 | (*ret)->usage_exclusive = quota.exclusive; | |
237 | ||
238 | (*ret)->limit = quota.referenced_max; | |
239 | (*ret)->limit_exclusive = quota.exclusive_max; | |
240 | } | |
b6b18498 LP |
241 | } |
242 | ||
c2ce6a3d | 243 | return 1; |
cd61c3bf | 244 | } |
c2ce6a3d | 245 | } |
cd61c3bf | 246 | |
01b72568 LP |
247 | /* If the IMMUTABLE bit is set, we consider the |
248 | * directory read-only. Since the ioctl is not | |
249 | * supported everywhere we ignore failures. */ | |
250 | (void) read_attr_fd(fd, &file_attr); | |
cd61c3bf | 251 | |
01b72568 | 252 | /* It's just a normal directory. */ |
c2ce6a3d | 253 | r = image_new(IMAGE_DIRECTORY, |
5fc7f358 | 254 | pretty, |
c2ce6a3d | 255 | path, |
5fc7f358 | 256 | filename, |
01b72568 | 257 | read_only || (file_attr & FS_IMMUTABLE_FL), |
c2ce6a3d LP |
258 | 0, |
259 | 0, | |
260 | ret); | |
261 | if (r < 0) | |
262 | return r; | |
cd61c3bf | 263 | |
c2ce6a3d | 264 | return 1; |
cd61c3bf | 265 | |
aceac2f0 | 266 | } else if (S_ISREG(st.st_mode) && endswith(filename, ".raw")) { |
10f9c755 | 267 | usec_t crtime = 0; |
cd61c3bf | 268 | |
aceac2f0 | 269 | /* It's a RAW disk image */ |
cd61c3bf | 270 | |
c2ce6a3d LP |
271 | if (!ret) |
272 | return 1; | |
cd61c3bf | 273 | |
5fc7f358 | 274 | fd_getcrtime_at(dfd, filename, &crtime, 0); |
10f9c755 | 275 | |
5fc7f358 LP |
276 | if (!pretty) |
277 | pretty = strndupa(filename, strlen(filename) - 4); | |
10f9c755 | 278 | |
aceac2f0 | 279 | r = image_new(IMAGE_RAW, |
5fc7f358 | 280 | pretty, |
c2ce6a3d | 281 | path, |
5fc7f358 LP |
282 | filename, |
283 | !(st.st_mode & 0222) || read_only, | |
10f9c755 | 284 | crtime, |
c2ce6a3d | 285 | timespec_load(&st.st_mtim), |
c2ce6a3d LP |
286 | ret); |
287 | if (r < 0) | |
288 | return r; | |
cd61c3bf | 289 | |
c19de711 | 290 | (*ret)->usage = (*ret)->usage_exclusive = st.st_blocks * 512; |
b6b18498 LP |
291 | (*ret)->limit = (*ret)->limit_exclusive = st.st_size; |
292 | ||
c2ce6a3d | 293 | return 1; |
eb38edce LP |
294 | |
295 | } else if (S_ISBLK(st.st_mode)) { | |
296 | _cleanup_close_ int block_fd = -1; | |
297 | uint64_t size = UINT64_MAX; | |
298 | ||
299 | /* A block device */ | |
300 | ||
301 | if (!ret) | |
302 | return 1; | |
303 | ||
304 | if (!pretty) | |
305 | pretty = filename; | |
306 | ||
307 | block_fd = openat(dfd, filename, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY); | |
308 | if (block_fd < 0) | |
309 | log_debug_errno(errno, "Failed to open block device %s/%s, ignoring: %m", path, filename); | |
310 | else { | |
311 | if (fstat(block_fd, &st) < 0) | |
312 | return -errno; | |
313 | if (!S_ISBLK(st.st_mode)) /* Verify that what we opened is actually what we think it is */ | |
314 | return -ENOTTY; | |
315 | ||
316 | if (!read_only) { | |
317 | int state = 0; | |
318 | ||
319 | if (ioctl(block_fd, BLKROGET, &state) < 0) | |
320 | log_debug_errno(errno, "Failed to issue BLKROGET on device %s/%s, ignoring: %m", path, filename); | |
321 | else if (state) | |
322 | read_only = true; | |
323 | } | |
324 | ||
325 | if (ioctl(block_fd, BLKGETSIZE64, &size) < 0) | |
326 | log_debug_errno(errno, "Failed to issue BLKFLSBUF on device %s/%s, ignoring: %m", path, filename); | |
327 | ||
328 | block_fd = safe_close(block_fd); | |
329 | } | |
330 | ||
331 | r = image_new(IMAGE_BLOCK, | |
332 | pretty, | |
333 | path, | |
334 | filename, | |
335 | !(st.st_mode & 0222) || read_only, | |
336 | 0, | |
337 | 0, | |
338 | ret); | |
339 | if (r < 0) | |
340 | return r; | |
341 | ||
342 | if (size != 0 && size != UINT64_MAX) | |
343 | (*ret)->usage = (*ret)->usage_exclusive = (*ret)->limit = (*ret)->limit_exclusive = size; | |
344 | ||
345 | return 1; | |
c2ce6a3d | 346 | } |
cd61c3bf | 347 | |
c2ce6a3d LP |
348 | return 0; |
349 | } | |
cd61c3bf | 350 | |
c2ce6a3d LP |
351 | int image_find(const char *name, Image **ret) { |
352 | const char *path; | |
353 | int r; | |
cd61c3bf | 354 | |
c2ce6a3d | 355 | assert(name); |
cd61c3bf | 356 | |
c2ce6a3d LP |
357 | /* There are no images with invalid names */ |
358 | if (!image_name_is_valid(name)) | |
359 | return 0; | |
cd61c3bf | 360 | |
c2ce6a3d LP |
361 | NULSTR_FOREACH(path, image_search_path) { |
362 | _cleanup_closedir_ DIR *d = NULL; | |
cd61c3bf | 363 | |
c2ce6a3d LP |
364 | d = opendir(path); |
365 | if (!d) { | |
366 | if (errno == ENOENT) | |
367 | continue; | |
cd61c3bf | 368 | |
c2ce6a3d LP |
369 | return -errno; |
370 | } | |
cd61c3bf | 371 | |
5fc7f358 | 372 | r = image_make(NULL, dirfd(d), path, name, ret); |
4c701096 | 373 | if (IN_SET(r, 0, -ENOENT)) { |
aceac2f0 | 374 | _cleanup_free_ char *raw = NULL; |
5fc7f358 | 375 | |
aceac2f0 LP |
376 | raw = strappend(name, ".raw"); |
377 | if (!raw) | |
5fc7f358 LP |
378 | return -ENOMEM; |
379 | ||
aceac2f0 | 380 | r = image_make(NULL, dirfd(d), path, raw, ret); |
4c701096 | 381 | if (IN_SET(r, 0, -ENOENT)) |
5fc7f358 LP |
382 | continue; |
383 | } | |
c2ce6a3d LP |
384 | if (r < 0) |
385 | return r; | |
cd61c3bf | 386 | |
c2ce6a3d LP |
387 | return 1; |
388 | } | |
389 | ||
5fc7f358 | 390 | if (streq(name, ".host")) |
27c88c4e | 391 | return image_make(".host", AT_FDCWD, NULL, "/", ret); |
5fc7f358 | 392 | |
c2ce6a3d LP |
393 | return 0; |
394 | }; | |
395 | ||
396 | int image_discover(Hashmap *h) { | |
397 | const char *path; | |
398 | int r; | |
399 | ||
400 | assert(h); | |
401 | ||
402 | NULSTR_FOREACH(path, image_search_path) { | |
403 | _cleanup_closedir_ DIR *d = NULL; | |
404 | struct dirent *de; | |
405 | ||
406 | d = opendir(path); | |
407 | if (!d) { | |
408 | if (errno == ENOENT) | |
a67a4c8c | 409 | continue; |
c2ce6a3d LP |
410 | |
411 | return -errno; | |
412 | } | |
413 | ||
414 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
415 | _cleanup_(image_unrefp) Image *image = NULL; | |
416 | ||
417 | if (!image_name_is_valid(de->d_name)) | |
418 | continue; | |
419 | ||
420 | if (hashmap_contains(h, de->d_name)) | |
421 | continue; | |
422 | ||
5fc7f358 | 423 | r = image_make(NULL, dirfd(d), path, de->d_name, &image); |
4c701096 | 424 | if (IN_SET(r, 0, -ENOENT)) |
c2ce6a3d LP |
425 | continue; |
426 | if (r < 0) | |
427 | return r; | |
428 | ||
429 | r = hashmap_put(h, image->name, image); | |
430 | if (r < 0) | |
431 | return r; | |
432 | ||
433 | image = NULL; | |
cd61c3bf LP |
434 | } |
435 | } | |
436 | ||
5fc7f358 LP |
437 | if (!hashmap_contains(h, ".host")) { |
438 | _cleanup_(image_unrefp) Image *image = NULL; | |
439 | ||
440 | r = image_make(".host", AT_FDCWD, NULL, "/", &image); | |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
444 | r = hashmap_put(h, image->name, image); | |
445 | if (r < 0) | |
446 | return r; | |
447 | ||
448 | image = NULL; | |
449 | ||
450 | } | |
451 | ||
cd61c3bf LP |
452 | return 0; |
453 | } | |
454 | ||
08682124 | 455 | int image_remove(Image *i) { |
30535c16 | 456 | _cleanup_release_lock_file_ LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
8e0b6570 | 457 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 458 | _cleanup_free_ char *roothash = NULL; |
8e0b6570 | 459 | char **j; |
30535c16 LP |
460 | int r; |
461 | ||
08682124 LP |
462 | assert(i); |
463 | ||
d94c2b06 | 464 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
08682124 LP |
465 | return -EROFS; |
466 | ||
8e0b6570 LP |
467 | settings = image_settings_path(i); |
468 | if (!settings) | |
469 | return -ENOMEM; | |
470 | ||
bafbac4e LP |
471 | roothash = image_roothash_path(i); |
472 | if (!roothash) | |
473 | return -ENOMEM; | |
474 | ||
30535c16 LP |
475 | /* Make sure we don't interfere with a running nspawn */ |
476 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
477 | if (r < 0) | |
478 | return r; | |
479 | ||
ebd93cb6 LP |
480 | switch (i->type) { |
481 | ||
482 | case IMAGE_SUBVOLUME: | |
9fb0b9c7 LP |
483 | |
484 | /* Let's unlink first, maybe it is a symlink? If that works we are happy. Otherwise, let's get out the | |
485 | * big guns */ | |
486 | if (unlink(i->path) < 0) { | |
487 | r = btrfs_subvol_remove(i->path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); | |
488 | if (r < 0) | |
489 | return r; | |
490 | } | |
491 | ||
8e0b6570 | 492 | break; |
ebd93cb6 LP |
493 | |
494 | case IMAGE_DIRECTORY: | |
01b72568 | 495 | /* Allow deletion of read-only directories */ |
a67d68b8 | 496 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
8e0b6570 LP |
497 | r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
501 | break; | |
01b72568 | 502 | |
eb38edce LP |
503 | case IMAGE_BLOCK: |
504 | ||
505 | /* If this is inside of /dev, then it's a real block device, hence let's not touch the device node | |
506 | * itself (but let's remove the stuff stored alongside it). If it's anywhere else, let's try to unlink | |
507 | * the thing (it's most likely a symlink after all). */ | |
508 | ||
509 | if (path_startswith(i->path, "/dev")) | |
510 | break; | |
511 | ||
4831981d | 512 | _fallthrough_; |
aceac2f0 | 513 | case IMAGE_RAW: |
41d1ed05 LP |
514 | if (unlink(i->path) < 0) |
515 | return -errno; | |
8e0b6570 | 516 | break; |
ebd93cb6 LP |
517 | |
518 | default: | |
15411c0c | 519 | return -EOPNOTSUPP; |
ebd93cb6 | 520 | } |
8e0b6570 LP |
521 | |
522 | STRV_FOREACH(j, settings) { | |
523 | if (unlink(*j) < 0 && errno != ENOENT) | |
524 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", *j); | |
525 | } | |
526 | ||
bafbac4e LP |
527 | if (unlink(roothash) < 0 && errno != ENOENT) |
528 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", roothash); | |
529 | ||
8e0b6570 LP |
530 | return 0; |
531 | } | |
532 | ||
bafbac4e | 533 | static int rename_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
534 | _cleanup_free_ char *rs = NULL; |
535 | const char *fn; | |
536 | ||
bafbac4e | 537 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
538 | |
539 | rs = file_in_same_dir(path, fn); | |
540 | if (!rs) | |
541 | return -ENOMEM; | |
542 | ||
543 | return rename_noreplace(AT_FDCWD, path, AT_FDCWD, rs); | |
ebd93cb6 LP |
544 | } |
545 | ||
546 | int image_rename(Image *i, const char *new_name) { | |
30535c16 | 547 | _cleanup_release_lock_file_ LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT, name_lock = LOCK_FILE_INIT; |
bafbac4e | 548 | _cleanup_free_ char *new_path = NULL, *nn = NULL, *roothash = NULL; |
8e0b6570 | 549 | _cleanup_strv_free_ char **settings = NULL; |
01b72568 | 550 | unsigned file_attr = 0; |
8e0b6570 | 551 | char **j; |
ebd93cb6 LP |
552 | int r; |
553 | ||
554 | assert(i); | |
555 | ||
556 | if (!image_name_is_valid(new_name)) | |
557 | return -EINVAL; | |
558 | ||
d94c2b06 | 559 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
560 | return -EROFS; |
561 | ||
8e0b6570 LP |
562 | settings = image_settings_path(i); |
563 | if (!settings) | |
564 | return -ENOMEM; | |
565 | ||
bafbac4e LP |
566 | roothash = image_roothash_path(i); |
567 | if (!roothash) | |
568 | return -ENOMEM; | |
569 | ||
30535c16 LP |
570 | /* Make sure we don't interfere with a running nspawn */ |
571 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
572 | if (r < 0) | |
573 | return r; | |
574 | ||
575 | /* Make sure nobody takes the new name, between the time we | |
576 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 577 | * time we take possession of it */ |
30535c16 LP |
578 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
579 | if (r < 0) | |
580 | return r; | |
581 | ||
ebd93cb6 LP |
582 | r = image_find(new_name, NULL); |
583 | if (r < 0) | |
584 | return r; | |
585 | if (r > 0) | |
586 | return -EEXIST; | |
587 | ||
588 | switch (i->type) { | |
589 | ||
ebd93cb6 | 590 | case IMAGE_DIRECTORY: |
01b72568 LP |
591 | /* Turn of the immutable bit while we rename the image, so that we can rename it */ |
592 | (void) read_attr_path(i->path, &file_attr); | |
593 | ||
594 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 595 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
01b72568 | 596 | |
4831981d | 597 | _fallthrough_; |
01b72568 | 598 | case IMAGE_SUBVOLUME: |
ebd93cb6 LP |
599 | new_path = file_in_same_dir(i->path, new_name); |
600 | break; | |
601 | ||
eb38edce LP |
602 | case IMAGE_BLOCK: |
603 | ||
604 | /* Refuse renaming raw block devices in /dev, the names are picked by udev after all. */ | |
605 | if (path_startswith(i->path, "/dev")) | |
606 | return -EROFS; | |
607 | ||
608 | new_path = file_in_same_dir(i->path, new_name); | |
609 | break; | |
610 | ||
aceac2f0 | 611 | case IMAGE_RAW: { |
ebd93cb6 LP |
612 | const char *fn; |
613 | ||
63c372cb | 614 | fn = strjoina(new_name, ".raw"); |
ebd93cb6 LP |
615 | new_path = file_in_same_dir(i->path, fn); |
616 | break; | |
617 | } | |
618 | ||
619 | default: | |
15411c0c | 620 | return -EOPNOTSUPP; |
ebd93cb6 LP |
621 | } |
622 | ||
623 | if (!new_path) | |
624 | return -ENOMEM; | |
625 | ||
626 | nn = strdup(new_name); | |
627 | if (!nn) | |
628 | return -ENOMEM; | |
629 | ||
f85ef957 AC |
630 | r = rename_noreplace(AT_FDCWD, i->path, AT_FDCWD, new_path); |
631 | if (r < 0) | |
632 | return r; | |
ebd93cb6 | 633 | |
01b72568 LP |
634 | /* Restore the immutable bit, if it was set before */ |
635 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 636 | (void) chattr_path(new_path, FS_IMMUTABLE_FL, FS_IMMUTABLE_FL); |
01b72568 | 637 | |
f9ecfd3b DL |
638 | free_and_replace(i->path, new_path); |
639 | free_and_replace(i->name, nn); | |
ebd93cb6 | 640 | |
8e0b6570 | 641 | STRV_FOREACH(j, settings) { |
bafbac4e | 642 | r = rename_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
643 | if (r < 0 && r != -ENOENT) |
644 | log_debug_errno(r, "Failed to rename settings file %s, ignoring: %m", *j); | |
645 | } | |
646 | ||
bafbac4e LP |
647 | r = rename_auxiliary_file(roothash, new_name, ".roothash"); |
648 | if (r < 0 && r != -ENOENT) | |
649 | log_debug_errno(r, "Failed to rename roothash file %s, ignoring: %m", roothash); | |
650 | ||
ebd93cb6 LP |
651 | return 0; |
652 | } | |
653 | ||
bafbac4e | 654 | static int clone_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
655 | _cleanup_free_ char *rs = NULL; |
656 | const char *fn; | |
657 | ||
bafbac4e | 658 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
659 | |
660 | rs = file_in_same_dir(path, fn); | |
661 | if (!rs) | |
662 | return -ENOMEM; | |
663 | ||
1c876927 | 664 | return copy_file_atomic(path, rs, 0664, 0, COPY_REFLINK); |
8e0b6570 LP |
665 | } |
666 | ||
ebd93cb6 | 667 | int image_clone(Image *i, const char *new_name, bool read_only) { |
30535c16 | 668 | _cleanup_release_lock_file_ LockFile name_lock = LOCK_FILE_INIT; |
8e0b6570 | 669 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 670 | _cleanup_free_ char *roothash = NULL; |
ebd93cb6 | 671 | const char *new_path; |
8e0b6570 | 672 | char **j; |
ebd93cb6 LP |
673 | int r; |
674 | ||
675 | assert(i); | |
676 | ||
677 | if (!image_name_is_valid(new_name)) | |
678 | return -EINVAL; | |
679 | ||
8e0b6570 LP |
680 | settings = image_settings_path(i); |
681 | if (!settings) | |
682 | return -ENOMEM; | |
683 | ||
bafbac4e LP |
684 | roothash = image_roothash_path(i); |
685 | if (!roothash) | |
686 | return -ENOMEM; | |
687 | ||
30535c16 LP |
688 | /* Make sure nobody takes the new name, between the time we |
689 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 690 | * time we take possession of it */ |
30535c16 LP |
691 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
692 | if (r < 0) | |
693 | return r; | |
694 | ||
ebd93cb6 LP |
695 | r = image_find(new_name, NULL); |
696 | if (r < 0) | |
697 | return r; | |
698 | if (r > 0) | |
699 | return -EEXIST; | |
700 | ||
701 | switch (i->type) { | |
702 | ||
703 | case IMAGE_SUBVOLUME: | |
704 | case IMAGE_DIRECTORY: | |
9a50e3ca | 705 | /* If we can we'll always try to create a new btrfs subvolume here, even if the source is a plain |
13e785f7 | 706 | * directory. */ |
9a50e3ca | 707 | |
63c372cb | 708 | new_path = strjoina("/var/lib/machines/", new_name); |
ebd93cb6 | 709 | |
17cbb288 LP |
710 | r = btrfs_subvol_snapshot(i->path, new_path, |
711 | (read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | | |
712 | BTRFS_SNAPSHOT_FALLBACK_COPY | | |
713 | BTRFS_SNAPSHOT_FALLBACK_DIRECTORY | | |
714 | BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE | | |
715 | BTRFS_SNAPSHOT_RECURSIVE | | |
716 | BTRFS_SNAPSHOT_QUOTA); | |
717 | if (r >= 0) | |
9a50e3ca | 718 | /* Enable "subtree" quotas for the copy, if we didn't copy any quota from the source. */ |
8120ee28 | 719 | (void) btrfs_subvol_auto_qgroup(new_path, 0, true); |
5bcd08db | 720 | |
ebd93cb6 LP |
721 | break; |
722 | ||
aceac2f0 | 723 | case IMAGE_RAW: |
63c372cb | 724 | new_path = strjoina("/var/lib/machines/", new_name, ".raw"); |
ebd93cb6 | 725 | |
1c876927 | 726 | r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, FS_NOCOW_FL, COPY_REFLINK); |
ebd93cb6 LP |
727 | break; |
728 | ||
eb38edce | 729 | case IMAGE_BLOCK: |
ebd93cb6 | 730 | default: |
15411c0c | 731 | return -EOPNOTSUPP; |
ebd93cb6 LP |
732 | } |
733 | ||
734 | if (r < 0) | |
735 | return r; | |
736 | ||
8e0b6570 | 737 | STRV_FOREACH(j, settings) { |
bafbac4e | 738 | r = clone_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
739 | if (r < 0 && r != -ENOENT) |
740 | log_debug_errno(r, "Failed to clone settings %s, ignoring: %m", *j); | |
741 | } | |
742 | ||
bafbac4e LP |
743 | r = clone_auxiliary_file(roothash, new_name, ".roothash"); |
744 | if (r < 0 && r != -ENOENT) | |
745 | log_debug_errno(r, "Failed to clone root hash file %s, ignoring: %m", roothash); | |
746 | ||
ebd93cb6 LP |
747 | return 0; |
748 | } | |
749 | ||
750 | int image_read_only(Image *i, bool b) { | |
30535c16 | 751 | _cleanup_release_lock_file_ LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
ebd93cb6 | 752 | int r; |
c7664c07 | 753 | |
ebd93cb6 LP |
754 | assert(i); |
755 | ||
d94c2b06 | 756 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
757 | return -EROFS; |
758 | ||
30535c16 LP |
759 | /* Make sure we don't interfere with a running nspawn */ |
760 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
761 | if (r < 0) | |
762 | return r; | |
763 | ||
ebd93cb6 LP |
764 | switch (i->type) { |
765 | ||
766 | case IMAGE_SUBVOLUME: | |
5bcd08db LP |
767 | |
768 | /* Note that we set the flag only on the top-level | |
769 | * subvolume of the image. */ | |
770 | ||
ebd93cb6 LP |
771 | r = btrfs_subvol_set_read_only(i->path, b); |
772 | if (r < 0) | |
773 | return r; | |
01b72568 LP |
774 | |
775 | break; | |
776 | ||
777 | case IMAGE_DIRECTORY: | |
778 | /* For simple directory trees we cannot use the access | |
779 | mode of the top-level directory, since it has an | |
780 | effect on the container itself. However, we can | |
781 | use the "immutable" flag, to at least make the | |
782 | top-level directory read-only. It's not as good as | |
783 | a read-only subvolume, but at least something, and | |
13e785f7 | 784 | we can read the value back. */ |
01b72568 | 785 | |
a67d68b8 | 786 | r = chattr_path(i->path, b ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL); |
01b72568 LP |
787 | if (r < 0) |
788 | return r; | |
789 | ||
ebd93cb6 LP |
790 | break; |
791 | ||
aceac2f0 | 792 | case IMAGE_RAW: { |
ebd93cb6 LP |
793 | struct stat st; |
794 | ||
795 | if (stat(i->path, &st) < 0) | |
796 | return -errno; | |
797 | ||
798 | if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0) | |
799 | return -errno; | |
f2068bcc LP |
800 | |
801 | /* If the images is now read-only, it's a good time to | |
802 | * defrag it, given that no write patterns will | |
803 | * fragment it again. */ | |
804 | if (b) | |
805 | (void) btrfs_defrag(i->path); | |
ebd93cb6 LP |
806 | break; |
807 | } | |
808 | ||
eb38edce LP |
809 | case IMAGE_BLOCK: { |
810 | _cleanup_close_ int fd = -1; | |
811 | struct stat st; | |
812 | int state = b; | |
813 | ||
814 | fd = open(i->path, O_CLOEXEC|O_RDONLY|O_NONBLOCK|O_NOCTTY); | |
815 | if (fd < 0) | |
816 | return -errno; | |
817 | ||
818 | if (fstat(fd, &st) < 0) | |
819 | return -errno; | |
820 | if (!S_ISBLK(st.st_mode)) | |
821 | return -ENOTTY; | |
822 | ||
823 | if (ioctl(fd, BLKROSET, &state) < 0) | |
824 | return -errno; | |
825 | ||
826 | break; | |
827 | } | |
828 | ||
ebd93cb6 | 829 | default: |
15411c0c | 830 | return -EOPNOTSUPP; |
ebd93cb6 LP |
831 | } |
832 | ||
833 | return 0; | |
08682124 LP |
834 | } |
835 | ||
30535c16 LP |
836 | int image_path_lock(const char *path, int operation, LockFile *global, LockFile *local) { |
837 | _cleanup_free_ char *p = NULL; | |
838 | LockFile t = LOCK_FILE_INIT; | |
839 | struct stat st; | |
840 | int r; | |
841 | ||
842 | assert(path); | |
843 | assert(global); | |
844 | assert(local); | |
845 | ||
846 | /* Locks an image path. This actually creates two locks: one | |
847 | * "local" one, next to the image path itself, which might be | |
848 | * shared via NFS. And another "global" one, in /run, that | |
849 | * uses the device/inode number. This has the benefit that we | |
850 | * can even lock a tree that is a mount point, correctly. */ | |
851 | ||
30535c16 LP |
852 | if (!path_is_absolute(path)) |
853 | return -EINVAL; | |
854 | ||
b6e953f2 LP |
855 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
856 | *local = *global = (LockFile) LOCK_FILE_INIT; | |
857 | return 0; | |
858 | } | |
859 | ||
860 | if (path_equal(path, "/")) | |
861 | return -EBUSY; | |
862 | ||
30535c16 | 863 | if (stat(path, &st) >= 0) { |
eb38edce LP |
864 | if (S_ISBLK(st.st_mode)) |
865 | r = asprintf(&p, "/run/systemd/nspawn/locks/block-%u:%u", major(st.st_rdev), minor(st.st_rdev)); | |
866 | else if (S_ISDIR(st.st_mode) || S_ISREG(st.st_mode)) | |
867 | r = asprintf(&p, "/run/systemd/nspawn/locks/inode-%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino); | |
868 | else | |
869 | return -ENOTTY; | |
870 | ||
871 | if (r < 0) | |
30535c16 LP |
872 | return -ENOMEM; |
873 | } | |
874 | ||
eb38edce LP |
875 | /* For block devices we don't need the "local" lock, as the major/minor lock above should be sufficient, since |
876 | * block devices are device local anyway. */ | |
877 | if (!path_startswith(path, "/dev")) { | |
878 | r = make_lock_file_for(path, operation, &t); | |
8be17c9b LT |
879 | if (r < 0) { |
880 | if ((operation & LOCK_SH) && r == -EROFS) | |
771b7ead | 881 | log_debug_errno(r, "Failed to create shared lock for '%s', ignoring: %m", path); |
8be17c9b LT |
882 | else |
883 | return r; | |
884 | } | |
eb38edce | 885 | } |
30535c16 LP |
886 | |
887 | if (p) { | |
7e7cddb2 | 888 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
30535c16 LP |
889 | |
890 | r = make_lock_file(p, operation, global); | |
891 | if (r < 0) { | |
892 | release_lock_file(&t); | |
893 | return r; | |
894 | } | |
546dbec5 LP |
895 | } else |
896 | *global = (LockFile) LOCK_FILE_INIT; | |
30535c16 LP |
897 | |
898 | *local = t; | |
899 | return 0; | |
900 | } | |
901 | ||
cb81cd80 | 902 | int image_set_limit(Image *i, uint64_t referenced_max) { |
d6ce17c7 LP |
903 | assert(i); |
904 | ||
d94c2b06 | 905 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
d6ce17c7 LP |
906 | return -EROFS; |
907 | ||
908 | if (i->type != IMAGE_SUBVOLUME) | |
15411c0c | 909 | return -EOPNOTSUPP; |
d6ce17c7 | 910 | |
5bcd08db LP |
911 | /* We set the quota both for the subvolume as well as for the |
912 | * subtree. The latter is mostly for historical reasons, since | |
913 | * we didn't use to have a concept of subtree quota, and hence | |
914 | * only modified the subvolume quota. */ | |
915 | ||
916 | (void) btrfs_qgroup_set_limit(i->path, 0, referenced_max); | |
917 | (void) btrfs_subvol_auto_qgroup(i->path, 0, true); | |
918 | return btrfs_subvol_set_subtree_quota_limit(i->path, 0, referenced_max); | |
d6ce17c7 LP |
919 | } |
920 | ||
c7664c07 LP |
921 | int image_read_metadata(Image *i) { |
922 | _cleanup_release_lock_file_ LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; | |
923 | int r; | |
924 | ||
925 | assert(i); | |
926 | ||
927 | r = image_path_lock(i->path, LOCK_SH|LOCK_NB, &global_lock, &local_lock); | |
928 | if (r < 0) | |
929 | return r; | |
930 | ||
931 | switch (i->type) { | |
932 | ||
933 | case IMAGE_SUBVOLUME: | |
934 | case IMAGE_DIRECTORY: { | |
935 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL; | |
936 | sd_id128_t machine_id = SD_ID128_NULL; | |
937 | _cleanup_free_ char *hostname = NULL; | |
938 | _cleanup_free_ char *path = NULL; | |
939 | ||
62570f6f | 940 | r = chase_symlinks("/etc/hostname", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
941 | if (r < 0 && r != -ENOENT) |
942 | log_debug_errno(r, "Failed to chase /etc/hostname in image %s: %m", i->name); | |
943 | else if (r >= 0) { | |
944 | r = read_etc_hostname(path, &hostname); | |
945 | if (r < 0) | |
946 | log_debug_errno(errno, "Failed to read /etc/hostname of image %s: %m", i->name); | |
947 | } | |
948 | ||
949 | path = mfree(path); | |
950 | ||
62570f6f | 951 | r = chase_symlinks("/etc/machine-id", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
952 | if (r < 0 && r != -ENOENT) |
953 | log_debug_errno(r, "Failed to chase /etc/machine-id in image %s: %m", i->name); | |
954 | else if (r >= 0) { | |
955 | _cleanup_close_ int fd = -1; | |
956 | ||
957 | fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
958 | if (fd < 0) | |
959 | log_debug_errno(errno, "Failed to open %s: %m", path); | |
960 | else { | |
961 | r = id128_read_fd(fd, ID128_PLAIN, &machine_id); | |
962 | if (r < 0) | |
963 | log_debug_errno(r, "Image %s contains invalid machine ID.", i->name); | |
964 | } | |
965 | } | |
966 | ||
967 | path = mfree(path); | |
968 | ||
62570f6f | 969 | r = chase_symlinks("/etc/machine-info", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
970 | if (r < 0 && r != -ENOENT) |
971 | log_debug_errno(r, "Failed to chase /etc/machine-info in image %s: %m", i->name); | |
972 | else if (r >= 0) { | |
973 | r = load_env_file_pairs(NULL, path, NULL, &machine_info); | |
974 | if (r < 0) | |
975 | log_debug_errno(r, "Failed to parse machine-info data of %s: %m", i->name); | |
976 | } | |
977 | ||
978 | path = mfree(path); | |
979 | ||
62570f6f | 980 | r = chase_symlinks("/etc/os-release", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 | 981 | if (r == -ENOENT) |
62570f6f | 982 | r = chase_symlinks("/usr/lib/os-release", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
983 | if (r < 0 && r != -ENOENT) |
984 | log_debug_errno(r, "Failed to chase os-release in image: %m"); | |
985 | else if (r >= 0) { | |
986 | r = load_env_file_pairs(NULL, path, NULL, &os_release); | |
987 | if (r < 0) | |
988 | log_debug_errno(r, "Failed to parse os-release data of %s: %m", i->name); | |
989 | } | |
990 | ||
991 | free_and_replace(i->hostname, hostname); | |
992 | i->machine_id = machine_id; | |
993 | strv_free_and_replace(i->machine_info, machine_info); | |
994 | strv_free_and_replace(i->os_release, os_release); | |
995 | ||
996 | break; | |
997 | } | |
998 | ||
999 | case IMAGE_RAW: | |
1000 | case IMAGE_BLOCK: { | |
1001 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
1002 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
1003 | ||
1004 | r = loop_device_make_by_path(i->path, O_RDONLY, &d); | |
1005 | if (r < 0) | |
1006 | return r; | |
1007 | ||
1008 | r = dissect_image(d->fd, NULL, 0, DISSECT_IMAGE_REQUIRE_ROOT, &m); | |
1009 | if (r < 0) | |
1010 | return r; | |
1011 | ||
1012 | r = dissected_image_acquire_metadata(m); | |
1013 | if (r < 0) | |
1014 | return r; | |
1015 | ||
1016 | free_and_replace(i->hostname, m->hostname); | |
1017 | i->machine_id = m->machine_id; | |
1018 | strv_free_and_replace(i->machine_info, m->machine_info); | |
1019 | strv_free_and_replace(i->os_release, m->os_release); | |
1020 | ||
1021 | break; | |
1022 | } | |
1023 | ||
1024 | default: | |
1025 | return -EOPNOTSUPP; | |
1026 | } | |
1027 | ||
1028 | i->metadata_valid = true; | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
30535c16 LP |
1033 | int image_name_lock(const char *name, int operation, LockFile *ret) { |
1034 | const char *p; | |
1035 | ||
1036 | assert(name); | |
1037 | assert(ret); | |
1038 | ||
1039 | /* Locks an image name, regardless of the precise path used. */ | |
1040 | ||
1041 | if (!image_name_is_valid(name)) | |
1042 | return -EINVAL; | |
1043 | ||
b6e953f2 LP |
1044 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
1045 | *ret = (LockFile) LOCK_FILE_INIT; | |
1046 | return 0; | |
1047 | } | |
1048 | ||
30535c16 LP |
1049 | if (streq(name, ".host")) |
1050 | return -EBUSY; | |
1051 | ||
7e7cddb2 | 1052 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
63c372cb | 1053 | p = strjoina("/run/systemd/nspawn/locks/name-", name); |
30535c16 LP |
1054 | |
1055 | return make_lock_file(p, operation, ret); | |
1056 | } | |
1057 | ||
1058 | bool image_name_is_valid(const char *s) { | |
1059 | if (!filename_is_valid(s)) | |
1060 | return false; | |
1061 | ||
1062 | if (string_has_cc(s, NULL)) | |
1063 | return false; | |
1064 | ||
1065 | if (!utf8_is_valid(s)) | |
1066 | return false; | |
1067 | ||
1068 | /* Temporary files for atomically creating new files */ | |
1069 | if (startswith(s, ".#")) | |
1070 | return false; | |
1071 | ||
1072 | return true; | |
1073 | } | |
1074 | ||
cd61c3bf LP |
1075 | static const char* const image_type_table[_IMAGE_TYPE_MAX] = { |
1076 | [IMAGE_DIRECTORY] = "directory", | |
1077 | [IMAGE_SUBVOLUME] = "subvolume", | |
aceac2f0 | 1078 | [IMAGE_RAW] = "raw", |
eb38edce | 1079 | [IMAGE_BLOCK] = "block", |
cd61c3bf LP |
1080 | }; |
1081 | ||
1082 | DEFINE_STRING_TABLE_LOOKUP(image_type, ImageType); |