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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 | |
cd61c3bf LP |
6 | ***/ |
7 | ||
a8fbdf54 TA |
8 | #include <dirent.h> |
9 | #include <errno.h> | |
ebd93cb6 | 10 | #include <fcntl.h> |
a8fbdf54 TA |
11 | #include <stdio.h> |
12 | #include <stdlib.h> | |
13 | #include <string.h> | |
e306723e | 14 | #include <sys/file.h> |
a8fbdf54 TA |
15 | #include <sys/stat.h> |
16 | #include <unistd.h> | |
8e0b6570 | 17 | #include <linux/fs.h> |
546dbec5 | 18 | |
b5efdb8a | 19 | #include "alloc-util.h" |
cd61c3bf | 20 | #include "btrfs-util.h" |
c8b3094d | 21 | #include "chattr-util.h" |
ebd93cb6 | 22 | #include "copy.h" |
a0956174 | 23 | #include "dirent-util.h" |
c7664c07 | 24 | #include "dissect-image.h" |
b6e953f2 | 25 | #include "env-util.h" |
3ffd4af2 | 26 | #include "fd-util.h" |
c7664c07 | 27 | #include "fileio.h" |
f4f15635 | 28 | #include "fs-util.h" |
a8fbdf54 | 29 | #include "hashmap.h" |
c7664c07 LP |
30 | #include "hostname-util.h" |
31 | #include "id128-util.h" | |
a8fbdf54 TA |
32 | #include "lockfile-util.h" |
33 | #include "log.h" | |
c7664c07 | 34 | #include "loop-util.h" |
3ffd4af2 | 35 | #include "machine-image.h" |
546dbec5 | 36 | #include "macro.h" |
30535c16 | 37 | #include "mkdir.h" |
8e0b6570 | 38 | #include "path-util.h" |
c6878637 | 39 | #include "rm-rf.h" |
8b43440b | 40 | #include "string-table.h" |
07630cea | 41 | #include "string-util.h" |
8e0b6570 | 42 | #include "strv.h" |
a8fbdf54 | 43 | #include "time-util.h" |
8e0b6570 | 44 | #include "utf8.h" |
a8fbdf54 | 45 | #include "util.h" |
89a5a90c | 46 | #include "xattr-util.h" |
cd61c3bf | 47 | |
c2ce6a3d | 48 | static const char image_search_path[] = |
42c6f2c9 | 49 | "/var/lib/machines\0" |
7d105503 | 50 | "/var/lib/container\0" /* legacy */ |
42c6f2c9 LP |
51 | "/usr/local/lib/machines\0" |
52 | "/usr/lib/machines\0"; | |
c2ce6a3d | 53 | |
cd61c3bf LP |
54 | Image *image_unref(Image *i) { |
55 | if (!i) | |
56 | return NULL; | |
57 | ||
58 | free(i->name); | |
59 | free(i->path); | |
c7664c07 LP |
60 | |
61 | free(i->hostname); | |
62 | strv_free(i->machine_info); | |
63 | strv_free(i->os_release); | |
64 | ||
6b430fdb | 65 | return mfree(i); |
cd61c3bf LP |
66 | } |
67 | ||
8e0b6570 LP |
68 | static char **image_settings_path(Image *image) { |
69 | _cleanup_strv_free_ char **l = NULL; | |
8e0b6570 LP |
70 | const char *fn, *s; |
71 | unsigned i = 0; | |
72 | ||
73 | assert(image); | |
74 | ||
75 | l = new0(char*, 4); | |
76 | if (!l) | |
77 | return NULL; | |
78 | ||
79 | fn = strjoina(image->name, ".nspawn"); | |
80 | ||
81 | FOREACH_STRING(s, "/etc/systemd/nspawn/", "/run/systemd/nspawn/") { | |
82 | l[i] = strappend(s, fn); | |
83 | if (!l[i]) | |
84 | return NULL; | |
85 | ||
86 | i++; | |
87 | } | |
88 | ||
89 | l[i] = file_in_same_dir(image->path, fn); | |
90 | if (!l[i]) | |
91 | return NULL; | |
92 | ||
ae2a15bc | 93 | return TAKE_PTR(l); |
8e0b6570 LP |
94 | } |
95 | ||
bafbac4e LP |
96 | static char *image_roothash_path(Image *image) { |
97 | const char *fn; | |
98 | ||
99 | assert(image); | |
100 | ||
101 | fn = strjoina(image->name, ".roothash"); | |
102 | ||
103 | return file_in_same_dir(image->path, fn); | |
104 | } | |
105 | ||
c2ce6a3d | 106 | static int image_new( |
cd61c3bf | 107 | ImageType t, |
5fc7f358 | 108 | const char *pretty, |
cd61c3bf | 109 | const char *path, |
5fc7f358 | 110 | const char *filename, |
cd61c3bf | 111 | bool read_only, |
10f9c755 | 112 | usec_t crtime, |
cd61c3bf | 113 | usec_t mtime, |
c2ce6a3d | 114 | Image **ret) { |
cd61c3bf LP |
115 | |
116 | _cleanup_(image_unrefp) Image *i = NULL; | |
cd61c3bf | 117 | |
cd61c3bf LP |
118 | assert(t >= 0); |
119 | assert(t < _IMAGE_TYPE_MAX); | |
5fc7f358 LP |
120 | assert(pretty); |
121 | assert(filename); | |
c2ce6a3d | 122 | assert(ret); |
cd61c3bf | 123 | |
c2ce6a3d | 124 | i = new0(Image, 1); |
cd61c3bf LP |
125 | if (!i) |
126 | return -ENOMEM; | |
127 | ||
128 | i->type = t; | |
129 | i->read_only = read_only; | |
10f9c755 | 130 | i->crtime = crtime; |
cd61c3bf | 131 | i->mtime = mtime; |
c19de711 | 132 | i->usage = i->usage_exclusive = (uint64_t) -1; |
b6b18498 | 133 | i->limit = i->limit_exclusive = (uint64_t) -1; |
cd61c3bf | 134 | |
5fc7f358 | 135 | i->name = strdup(pretty); |
cd61c3bf LP |
136 | if (!i->name) |
137 | return -ENOMEM; | |
138 | ||
5fc7f358 | 139 | if (path) |
605405c6 | 140 | i->path = strjoin(path, "/", filename); |
5fc7f358 LP |
141 | else |
142 | i->path = strdup(filename); | |
ebeccf9e | 143 | |
5fc7f358 LP |
144 | if (!i->path) |
145 | return -ENOMEM; | |
146 | ||
147 | path_kill_slashes(i->path); | |
cd61c3bf | 148 | |
1cc6c93a | 149 | *ret = TAKE_PTR(i); |
c2ce6a3d | 150 | |
cd61c3bf LP |
151 | return 0; |
152 | } | |
153 | ||
5fc7f358 LP |
154 | static int image_make( |
155 | const char *pretty, | |
156 | int dfd, | |
157 | const char *path, | |
158 | const char *filename, | |
159 | Image **ret) { | |
160 | ||
c2ce6a3d | 161 | struct stat st; |
5fc7f358 | 162 | bool read_only; |
cd61c3bf LP |
163 | int r; |
164 | ||
5fc7f358 | 165 | assert(filename); |
cd61c3bf | 166 | |
eb38edce LP |
167 | /* We explicitly *do* follow symlinks here, since we want to allow symlinking trees, raw files and block |
168 | * devices into /var/lib/machines/, and treat them normally. */ | |
cd61c3bf | 169 | |
5fc7f358 | 170 | if (fstatat(dfd, filename, &st, 0) < 0) |
c2ce6a3d | 171 | return -errno; |
cd61c3bf | 172 | |
5fc7f358 LP |
173 | read_only = |
174 | (path && path_startswith(path, "/usr")) || | |
08ff5529 | 175 | (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS); |
86e339c8 | 176 | |
c2ce6a3d | 177 | if (S_ISDIR(st.st_mode)) { |
01b72568 LP |
178 | _cleanup_close_ int fd = -1; |
179 | unsigned file_attr = 0; | |
cd61c3bf | 180 | |
c2ce6a3d LP |
181 | if (!ret) |
182 | return 1; | |
cd61c3bf | 183 | |
5fc7f358 LP |
184 | if (!pretty) |
185 | pretty = filename; | |
186 | ||
01b72568 LP |
187 | fd = openat(dfd, filename, O_CLOEXEC|O_NOCTTY|O_DIRECTORY); |
188 | if (fd < 0) | |
189 | return -errno; | |
190 | ||
c2ce6a3d LP |
191 | /* btrfs subvolumes have inode 256 */ |
192 | if (st.st_ino == 256) { | |
cd61c3bf | 193 | |
21222ea5 LP |
194 | r = btrfs_is_filesystem(fd); |
195 | if (r < 0) | |
196 | return r; | |
197 | if (r) { | |
10f9c755 | 198 | BtrfsSubvolInfo info; |
cd61c3bf | 199 | |
c2ce6a3d | 200 | /* It's a btrfs subvolume */ |
cd61c3bf | 201 | |
5bcd08db | 202 | r = btrfs_subvol_get_info_fd(fd, 0, &info); |
10f9c755 LP |
203 | if (r < 0) |
204 | return r; | |
c2ce6a3d LP |
205 | |
206 | r = image_new(IMAGE_SUBVOLUME, | |
5fc7f358 | 207 | pretty, |
c2ce6a3d | 208 | path, |
5fc7f358 LP |
209 | filename, |
210 | info.read_only || read_only, | |
10f9c755 | 211 | info.otime, |
c2ce6a3d | 212 | 0, |
c2ce6a3d LP |
213 | ret); |
214 | if (r < 0) | |
215 | return r; | |
216 | ||
5bcd08db LP |
217 | if (btrfs_quota_scan_ongoing(fd) == 0) { |
218 | BtrfsQuotaInfo quota; | |
b6b18498 | 219 | |
5bcd08db LP |
220 | r = btrfs_subvol_get_subtree_quota_fd(fd, 0, "a); |
221 | if (r >= 0) { | |
222 | (*ret)->usage = quota.referenced; | |
223 | (*ret)->usage_exclusive = quota.exclusive; | |
224 | ||
225 | (*ret)->limit = quota.referenced_max; | |
226 | (*ret)->limit_exclusive = quota.exclusive_max; | |
227 | } | |
b6b18498 LP |
228 | } |
229 | ||
c2ce6a3d | 230 | return 1; |
cd61c3bf | 231 | } |
c2ce6a3d | 232 | } |
cd61c3bf | 233 | |
01b72568 LP |
234 | /* If the IMMUTABLE bit is set, we consider the |
235 | * directory read-only. Since the ioctl is not | |
236 | * supported everywhere we ignore failures. */ | |
237 | (void) read_attr_fd(fd, &file_attr); | |
cd61c3bf | 238 | |
01b72568 | 239 | /* It's just a normal directory. */ |
c2ce6a3d | 240 | r = image_new(IMAGE_DIRECTORY, |
5fc7f358 | 241 | pretty, |
c2ce6a3d | 242 | path, |
5fc7f358 | 243 | filename, |
01b72568 | 244 | read_only || (file_attr & FS_IMMUTABLE_FL), |
c2ce6a3d LP |
245 | 0, |
246 | 0, | |
247 | ret); | |
248 | if (r < 0) | |
249 | return r; | |
cd61c3bf | 250 | |
c2ce6a3d | 251 | return 1; |
cd61c3bf | 252 | |
aceac2f0 | 253 | } else if (S_ISREG(st.st_mode) && endswith(filename, ".raw")) { |
10f9c755 | 254 | usec_t crtime = 0; |
cd61c3bf | 255 | |
aceac2f0 | 256 | /* It's a RAW disk image */ |
cd61c3bf | 257 | |
c2ce6a3d LP |
258 | if (!ret) |
259 | return 1; | |
cd61c3bf | 260 | |
5fc7f358 | 261 | fd_getcrtime_at(dfd, filename, &crtime, 0); |
10f9c755 | 262 | |
5fc7f358 LP |
263 | if (!pretty) |
264 | pretty = strndupa(filename, strlen(filename) - 4); | |
10f9c755 | 265 | |
aceac2f0 | 266 | r = image_new(IMAGE_RAW, |
5fc7f358 | 267 | pretty, |
c2ce6a3d | 268 | path, |
5fc7f358 LP |
269 | filename, |
270 | !(st.st_mode & 0222) || read_only, | |
10f9c755 | 271 | crtime, |
c2ce6a3d | 272 | timespec_load(&st.st_mtim), |
c2ce6a3d LP |
273 | ret); |
274 | if (r < 0) | |
275 | return r; | |
cd61c3bf | 276 | |
c19de711 | 277 | (*ret)->usage = (*ret)->usage_exclusive = st.st_blocks * 512; |
b6b18498 LP |
278 | (*ret)->limit = (*ret)->limit_exclusive = st.st_size; |
279 | ||
c2ce6a3d | 280 | return 1; |
eb38edce LP |
281 | |
282 | } else if (S_ISBLK(st.st_mode)) { | |
283 | _cleanup_close_ int block_fd = -1; | |
284 | uint64_t size = UINT64_MAX; | |
285 | ||
286 | /* A block device */ | |
287 | ||
288 | if (!ret) | |
289 | return 1; | |
290 | ||
291 | if (!pretty) | |
292 | pretty = filename; | |
293 | ||
294 | block_fd = openat(dfd, filename, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY); | |
295 | if (block_fd < 0) | |
296 | log_debug_errno(errno, "Failed to open block device %s/%s, ignoring: %m", path, filename); | |
297 | else { | |
298 | if (fstat(block_fd, &st) < 0) | |
299 | return -errno; | |
300 | if (!S_ISBLK(st.st_mode)) /* Verify that what we opened is actually what we think it is */ | |
301 | return -ENOTTY; | |
302 | ||
303 | if (!read_only) { | |
304 | int state = 0; | |
305 | ||
306 | if (ioctl(block_fd, BLKROGET, &state) < 0) | |
307 | log_debug_errno(errno, "Failed to issue BLKROGET on device %s/%s, ignoring: %m", path, filename); | |
308 | else if (state) | |
309 | read_only = true; | |
310 | } | |
311 | ||
312 | if (ioctl(block_fd, BLKGETSIZE64, &size) < 0) | |
313 | log_debug_errno(errno, "Failed to issue BLKFLSBUF on device %s/%s, ignoring: %m", path, filename); | |
314 | ||
315 | block_fd = safe_close(block_fd); | |
316 | } | |
317 | ||
318 | r = image_new(IMAGE_BLOCK, | |
319 | pretty, | |
320 | path, | |
321 | filename, | |
322 | !(st.st_mode & 0222) || read_only, | |
323 | 0, | |
324 | 0, | |
325 | ret); | |
326 | if (r < 0) | |
327 | return r; | |
328 | ||
329 | if (size != 0 && size != UINT64_MAX) | |
330 | (*ret)->usage = (*ret)->usage_exclusive = (*ret)->limit = (*ret)->limit_exclusive = size; | |
331 | ||
332 | return 1; | |
c2ce6a3d | 333 | } |
cd61c3bf | 334 | |
c2ce6a3d LP |
335 | return 0; |
336 | } | |
cd61c3bf | 337 | |
c2ce6a3d LP |
338 | int image_find(const char *name, Image **ret) { |
339 | const char *path; | |
340 | int r; | |
cd61c3bf | 341 | |
c2ce6a3d | 342 | assert(name); |
cd61c3bf | 343 | |
c2ce6a3d LP |
344 | /* There are no images with invalid names */ |
345 | if (!image_name_is_valid(name)) | |
346 | return 0; | |
cd61c3bf | 347 | |
c2ce6a3d LP |
348 | NULSTR_FOREACH(path, image_search_path) { |
349 | _cleanup_closedir_ DIR *d = NULL; | |
cd61c3bf | 350 | |
c2ce6a3d LP |
351 | d = opendir(path); |
352 | if (!d) { | |
353 | if (errno == ENOENT) | |
354 | continue; | |
cd61c3bf | 355 | |
c2ce6a3d LP |
356 | return -errno; |
357 | } | |
cd61c3bf | 358 | |
5fc7f358 | 359 | r = image_make(NULL, dirfd(d), path, name, ret); |
4c701096 | 360 | if (IN_SET(r, 0, -ENOENT)) { |
aceac2f0 | 361 | _cleanup_free_ char *raw = NULL; |
5fc7f358 | 362 | |
aceac2f0 LP |
363 | raw = strappend(name, ".raw"); |
364 | if (!raw) | |
5fc7f358 LP |
365 | return -ENOMEM; |
366 | ||
aceac2f0 | 367 | r = image_make(NULL, dirfd(d), path, raw, ret); |
4c701096 | 368 | if (IN_SET(r, 0, -ENOENT)) |
5fc7f358 LP |
369 | continue; |
370 | } | |
c2ce6a3d LP |
371 | if (r < 0) |
372 | return r; | |
cd61c3bf | 373 | |
c2ce6a3d LP |
374 | return 1; |
375 | } | |
376 | ||
5fc7f358 | 377 | if (streq(name, ".host")) |
27c88c4e | 378 | return image_make(".host", AT_FDCWD, NULL, "/", ret); |
5fc7f358 | 379 | |
c2ce6a3d LP |
380 | return 0; |
381 | }; | |
382 | ||
383 | int image_discover(Hashmap *h) { | |
384 | const char *path; | |
385 | int r; | |
386 | ||
387 | assert(h); | |
388 | ||
389 | NULSTR_FOREACH(path, image_search_path) { | |
390 | _cleanup_closedir_ DIR *d = NULL; | |
391 | struct dirent *de; | |
392 | ||
393 | d = opendir(path); | |
394 | if (!d) { | |
395 | if (errno == ENOENT) | |
a67a4c8c | 396 | continue; |
c2ce6a3d LP |
397 | |
398 | return -errno; | |
399 | } | |
400 | ||
401 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
402 | _cleanup_(image_unrefp) Image *image = NULL; | |
403 | ||
404 | if (!image_name_is_valid(de->d_name)) | |
405 | continue; | |
406 | ||
407 | if (hashmap_contains(h, de->d_name)) | |
408 | continue; | |
409 | ||
5fc7f358 | 410 | r = image_make(NULL, dirfd(d), path, de->d_name, &image); |
4c701096 | 411 | if (IN_SET(r, 0, -ENOENT)) |
c2ce6a3d LP |
412 | continue; |
413 | if (r < 0) | |
414 | return r; | |
415 | ||
416 | r = hashmap_put(h, image->name, image); | |
417 | if (r < 0) | |
418 | return r; | |
419 | ||
420 | image = NULL; | |
cd61c3bf LP |
421 | } |
422 | } | |
423 | ||
5fc7f358 LP |
424 | if (!hashmap_contains(h, ".host")) { |
425 | _cleanup_(image_unrefp) Image *image = NULL; | |
426 | ||
427 | r = image_make(".host", AT_FDCWD, NULL, "/", &image); | |
428 | if (r < 0) | |
429 | return r; | |
430 | ||
431 | r = hashmap_put(h, image->name, image); | |
432 | if (r < 0) | |
433 | return r; | |
434 | ||
435 | image = NULL; | |
436 | ||
437 | } | |
438 | ||
cd61c3bf LP |
439 | return 0; |
440 | } | |
441 | ||
08682124 | 442 | int image_remove(Image *i) { |
8e766630 | 443 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
8e0b6570 | 444 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 445 | _cleanup_free_ char *roothash = NULL; |
8e0b6570 | 446 | char **j; |
30535c16 LP |
447 | int r; |
448 | ||
08682124 LP |
449 | assert(i); |
450 | ||
d94c2b06 | 451 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
08682124 LP |
452 | return -EROFS; |
453 | ||
8e0b6570 LP |
454 | settings = image_settings_path(i); |
455 | if (!settings) | |
456 | return -ENOMEM; | |
457 | ||
bafbac4e LP |
458 | roothash = image_roothash_path(i); |
459 | if (!roothash) | |
460 | return -ENOMEM; | |
461 | ||
30535c16 LP |
462 | /* Make sure we don't interfere with a running nspawn */ |
463 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
464 | if (r < 0) | |
465 | return r; | |
466 | ||
ebd93cb6 LP |
467 | switch (i->type) { |
468 | ||
469 | case IMAGE_SUBVOLUME: | |
9fb0b9c7 LP |
470 | |
471 | /* Let's unlink first, maybe it is a symlink? If that works we are happy. Otherwise, let's get out the | |
472 | * big guns */ | |
473 | if (unlink(i->path) < 0) { | |
474 | r = btrfs_subvol_remove(i->path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); | |
475 | if (r < 0) | |
476 | return r; | |
477 | } | |
478 | ||
8e0b6570 | 479 | break; |
ebd93cb6 LP |
480 | |
481 | case IMAGE_DIRECTORY: | |
01b72568 | 482 | /* Allow deletion of read-only directories */ |
a67d68b8 | 483 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
8e0b6570 LP |
484 | r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
485 | if (r < 0) | |
486 | return r; | |
487 | ||
488 | break; | |
01b72568 | 489 | |
eb38edce LP |
490 | case IMAGE_BLOCK: |
491 | ||
492 | /* If this is inside of /dev, then it's a real block device, hence let's not touch the device node | |
493 | * itself (but let's remove the stuff stored alongside it). If it's anywhere else, let's try to unlink | |
494 | * the thing (it's most likely a symlink after all). */ | |
495 | ||
496 | if (path_startswith(i->path, "/dev")) | |
497 | break; | |
498 | ||
4831981d | 499 | _fallthrough_; |
aceac2f0 | 500 | case IMAGE_RAW: |
41d1ed05 LP |
501 | if (unlink(i->path) < 0) |
502 | return -errno; | |
8e0b6570 | 503 | break; |
ebd93cb6 LP |
504 | |
505 | default: | |
15411c0c | 506 | return -EOPNOTSUPP; |
ebd93cb6 | 507 | } |
8e0b6570 LP |
508 | |
509 | STRV_FOREACH(j, settings) { | |
510 | if (unlink(*j) < 0 && errno != ENOENT) | |
511 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", *j); | |
512 | } | |
513 | ||
bafbac4e LP |
514 | if (unlink(roothash) < 0 && errno != ENOENT) |
515 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", roothash); | |
516 | ||
8e0b6570 LP |
517 | return 0; |
518 | } | |
519 | ||
bafbac4e | 520 | static int rename_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
521 | _cleanup_free_ char *rs = NULL; |
522 | const char *fn; | |
523 | ||
bafbac4e | 524 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
525 | |
526 | rs = file_in_same_dir(path, fn); | |
527 | if (!rs) | |
528 | return -ENOMEM; | |
529 | ||
530 | return rename_noreplace(AT_FDCWD, path, AT_FDCWD, rs); | |
ebd93cb6 LP |
531 | } |
532 | ||
533 | int image_rename(Image *i, const char *new_name) { | |
8e766630 | 534 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT, name_lock = LOCK_FILE_INIT; |
bafbac4e | 535 | _cleanup_free_ char *new_path = NULL, *nn = NULL, *roothash = NULL; |
8e0b6570 | 536 | _cleanup_strv_free_ char **settings = NULL; |
01b72568 | 537 | unsigned file_attr = 0; |
8e0b6570 | 538 | char **j; |
ebd93cb6 LP |
539 | int r; |
540 | ||
541 | assert(i); | |
542 | ||
543 | if (!image_name_is_valid(new_name)) | |
544 | return -EINVAL; | |
545 | ||
d94c2b06 | 546 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
547 | return -EROFS; |
548 | ||
8e0b6570 LP |
549 | settings = image_settings_path(i); |
550 | if (!settings) | |
551 | return -ENOMEM; | |
552 | ||
bafbac4e LP |
553 | roothash = image_roothash_path(i); |
554 | if (!roothash) | |
555 | return -ENOMEM; | |
556 | ||
30535c16 LP |
557 | /* Make sure we don't interfere with a running nspawn */ |
558 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
559 | if (r < 0) | |
560 | return r; | |
561 | ||
562 | /* Make sure nobody takes the new name, between the time we | |
563 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 564 | * time we take possession of it */ |
30535c16 LP |
565 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
566 | if (r < 0) | |
567 | return r; | |
568 | ||
ebd93cb6 LP |
569 | r = image_find(new_name, NULL); |
570 | if (r < 0) | |
571 | return r; | |
572 | if (r > 0) | |
573 | return -EEXIST; | |
574 | ||
575 | switch (i->type) { | |
576 | ||
ebd93cb6 | 577 | case IMAGE_DIRECTORY: |
01b72568 LP |
578 | /* Turn of the immutable bit while we rename the image, so that we can rename it */ |
579 | (void) read_attr_path(i->path, &file_attr); | |
580 | ||
581 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 582 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
01b72568 | 583 | |
4831981d | 584 | _fallthrough_; |
01b72568 | 585 | case IMAGE_SUBVOLUME: |
ebd93cb6 LP |
586 | new_path = file_in_same_dir(i->path, new_name); |
587 | break; | |
588 | ||
eb38edce LP |
589 | case IMAGE_BLOCK: |
590 | ||
591 | /* Refuse renaming raw block devices in /dev, the names are picked by udev after all. */ | |
592 | if (path_startswith(i->path, "/dev")) | |
593 | return -EROFS; | |
594 | ||
595 | new_path = file_in_same_dir(i->path, new_name); | |
596 | break; | |
597 | ||
aceac2f0 | 598 | case IMAGE_RAW: { |
ebd93cb6 LP |
599 | const char *fn; |
600 | ||
63c372cb | 601 | fn = strjoina(new_name, ".raw"); |
ebd93cb6 LP |
602 | new_path = file_in_same_dir(i->path, fn); |
603 | break; | |
604 | } | |
605 | ||
606 | default: | |
15411c0c | 607 | return -EOPNOTSUPP; |
ebd93cb6 LP |
608 | } |
609 | ||
610 | if (!new_path) | |
611 | return -ENOMEM; | |
612 | ||
613 | nn = strdup(new_name); | |
614 | if (!nn) | |
615 | return -ENOMEM; | |
616 | ||
f85ef957 AC |
617 | r = rename_noreplace(AT_FDCWD, i->path, AT_FDCWD, new_path); |
618 | if (r < 0) | |
619 | return r; | |
ebd93cb6 | 620 | |
01b72568 LP |
621 | /* Restore the immutable bit, if it was set before */ |
622 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 623 | (void) chattr_path(new_path, FS_IMMUTABLE_FL, FS_IMMUTABLE_FL); |
01b72568 | 624 | |
f9ecfd3b DL |
625 | free_and_replace(i->path, new_path); |
626 | free_and_replace(i->name, nn); | |
ebd93cb6 | 627 | |
8e0b6570 | 628 | STRV_FOREACH(j, settings) { |
bafbac4e | 629 | r = rename_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
630 | if (r < 0 && r != -ENOENT) |
631 | log_debug_errno(r, "Failed to rename settings file %s, ignoring: %m", *j); | |
632 | } | |
633 | ||
bafbac4e LP |
634 | r = rename_auxiliary_file(roothash, new_name, ".roothash"); |
635 | if (r < 0 && r != -ENOENT) | |
636 | log_debug_errno(r, "Failed to rename roothash file %s, ignoring: %m", roothash); | |
637 | ||
ebd93cb6 LP |
638 | return 0; |
639 | } | |
640 | ||
bafbac4e | 641 | static int clone_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
642 | _cleanup_free_ char *rs = NULL; |
643 | const char *fn; | |
644 | ||
bafbac4e | 645 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
646 | |
647 | rs = file_in_same_dir(path, fn); | |
648 | if (!rs) | |
649 | return -ENOMEM; | |
650 | ||
1c876927 | 651 | return copy_file_atomic(path, rs, 0664, 0, COPY_REFLINK); |
8e0b6570 LP |
652 | } |
653 | ||
ebd93cb6 | 654 | int image_clone(Image *i, const char *new_name, bool read_only) { |
8e766630 | 655 | _cleanup_(release_lock_file) LockFile name_lock = LOCK_FILE_INIT; |
8e0b6570 | 656 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 657 | _cleanup_free_ char *roothash = NULL; |
ebd93cb6 | 658 | const char *new_path; |
8e0b6570 | 659 | char **j; |
ebd93cb6 LP |
660 | int r; |
661 | ||
662 | assert(i); | |
663 | ||
664 | if (!image_name_is_valid(new_name)) | |
665 | return -EINVAL; | |
666 | ||
8e0b6570 LP |
667 | settings = image_settings_path(i); |
668 | if (!settings) | |
669 | return -ENOMEM; | |
670 | ||
bafbac4e LP |
671 | roothash = image_roothash_path(i); |
672 | if (!roothash) | |
673 | return -ENOMEM; | |
674 | ||
30535c16 LP |
675 | /* Make sure nobody takes the new name, between the time we |
676 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 677 | * time we take possession of it */ |
30535c16 LP |
678 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
679 | if (r < 0) | |
680 | return r; | |
681 | ||
ebd93cb6 LP |
682 | r = image_find(new_name, NULL); |
683 | if (r < 0) | |
684 | return r; | |
685 | if (r > 0) | |
686 | return -EEXIST; | |
687 | ||
688 | switch (i->type) { | |
689 | ||
690 | case IMAGE_SUBVOLUME: | |
691 | case IMAGE_DIRECTORY: | |
9a50e3ca | 692 | /* If we can we'll always try to create a new btrfs subvolume here, even if the source is a plain |
13e785f7 | 693 | * directory. */ |
9a50e3ca | 694 | |
63c372cb | 695 | new_path = strjoina("/var/lib/machines/", new_name); |
ebd93cb6 | 696 | |
17cbb288 LP |
697 | r = btrfs_subvol_snapshot(i->path, new_path, |
698 | (read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | | |
699 | BTRFS_SNAPSHOT_FALLBACK_COPY | | |
700 | BTRFS_SNAPSHOT_FALLBACK_DIRECTORY | | |
701 | BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE | | |
702 | BTRFS_SNAPSHOT_RECURSIVE | | |
703 | BTRFS_SNAPSHOT_QUOTA); | |
704 | if (r >= 0) | |
9a50e3ca | 705 | /* Enable "subtree" quotas for the copy, if we didn't copy any quota from the source. */ |
8120ee28 | 706 | (void) btrfs_subvol_auto_qgroup(new_path, 0, true); |
5bcd08db | 707 | |
ebd93cb6 LP |
708 | break; |
709 | ||
aceac2f0 | 710 | case IMAGE_RAW: |
63c372cb | 711 | new_path = strjoina("/var/lib/machines/", new_name, ".raw"); |
ebd93cb6 | 712 | |
1c876927 | 713 | r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, FS_NOCOW_FL, COPY_REFLINK); |
ebd93cb6 LP |
714 | break; |
715 | ||
eb38edce | 716 | case IMAGE_BLOCK: |
ebd93cb6 | 717 | default: |
15411c0c | 718 | return -EOPNOTSUPP; |
ebd93cb6 LP |
719 | } |
720 | ||
721 | if (r < 0) | |
722 | return r; | |
723 | ||
8e0b6570 | 724 | STRV_FOREACH(j, settings) { |
bafbac4e | 725 | r = clone_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
726 | if (r < 0 && r != -ENOENT) |
727 | log_debug_errno(r, "Failed to clone settings %s, ignoring: %m", *j); | |
728 | } | |
729 | ||
bafbac4e LP |
730 | r = clone_auxiliary_file(roothash, new_name, ".roothash"); |
731 | if (r < 0 && r != -ENOENT) | |
732 | log_debug_errno(r, "Failed to clone root hash file %s, ignoring: %m", roothash); | |
733 | ||
ebd93cb6 LP |
734 | return 0; |
735 | } | |
736 | ||
737 | int image_read_only(Image *i, bool b) { | |
8e766630 | 738 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
ebd93cb6 | 739 | int r; |
c7664c07 | 740 | |
ebd93cb6 LP |
741 | assert(i); |
742 | ||
d94c2b06 | 743 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
744 | return -EROFS; |
745 | ||
30535c16 LP |
746 | /* Make sure we don't interfere with a running nspawn */ |
747 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
748 | if (r < 0) | |
749 | return r; | |
750 | ||
ebd93cb6 LP |
751 | switch (i->type) { |
752 | ||
753 | case IMAGE_SUBVOLUME: | |
5bcd08db LP |
754 | |
755 | /* Note that we set the flag only on the top-level | |
756 | * subvolume of the image. */ | |
757 | ||
ebd93cb6 LP |
758 | r = btrfs_subvol_set_read_only(i->path, b); |
759 | if (r < 0) | |
760 | return r; | |
01b72568 LP |
761 | |
762 | break; | |
763 | ||
764 | case IMAGE_DIRECTORY: | |
765 | /* For simple directory trees we cannot use the access | |
766 | mode of the top-level directory, since it has an | |
767 | effect on the container itself. However, we can | |
768 | use the "immutable" flag, to at least make the | |
769 | top-level directory read-only. It's not as good as | |
770 | a read-only subvolume, but at least something, and | |
13e785f7 | 771 | we can read the value back. */ |
01b72568 | 772 | |
a67d68b8 | 773 | r = chattr_path(i->path, b ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL); |
01b72568 LP |
774 | if (r < 0) |
775 | return r; | |
776 | ||
ebd93cb6 LP |
777 | break; |
778 | ||
aceac2f0 | 779 | case IMAGE_RAW: { |
ebd93cb6 LP |
780 | struct stat st; |
781 | ||
782 | if (stat(i->path, &st) < 0) | |
783 | return -errno; | |
784 | ||
785 | if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0) | |
786 | return -errno; | |
f2068bcc LP |
787 | |
788 | /* If the images is now read-only, it's a good time to | |
789 | * defrag it, given that no write patterns will | |
790 | * fragment it again. */ | |
791 | if (b) | |
792 | (void) btrfs_defrag(i->path); | |
ebd93cb6 LP |
793 | break; |
794 | } | |
795 | ||
eb38edce LP |
796 | case IMAGE_BLOCK: { |
797 | _cleanup_close_ int fd = -1; | |
798 | struct stat st; | |
799 | int state = b; | |
800 | ||
801 | fd = open(i->path, O_CLOEXEC|O_RDONLY|O_NONBLOCK|O_NOCTTY); | |
802 | if (fd < 0) | |
803 | return -errno; | |
804 | ||
805 | if (fstat(fd, &st) < 0) | |
806 | return -errno; | |
807 | if (!S_ISBLK(st.st_mode)) | |
808 | return -ENOTTY; | |
809 | ||
810 | if (ioctl(fd, BLKROSET, &state) < 0) | |
811 | return -errno; | |
812 | ||
813 | break; | |
814 | } | |
815 | ||
ebd93cb6 | 816 | default: |
15411c0c | 817 | return -EOPNOTSUPP; |
ebd93cb6 LP |
818 | } |
819 | ||
820 | return 0; | |
08682124 LP |
821 | } |
822 | ||
30535c16 LP |
823 | int image_path_lock(const char *path, int operation, LockFile *global, LockFile *local) { |
824 | _cleanup_free_ char *p = NULL; | |
825 | LockFile t = LOCK_FILE_INIT; | |
826 | struct stat st; | |
827 | int r; | |
828 | ||
829 | assert(path); | |
830 | assert(global); | |
831 | assert(local); | |
832 | ||
833 | /* Locks an image path. This actually creates two locks: one | |
834 | * "local" one, next to the image path itself, which might be | |
835 | * shared via NFS. And another "global" one, in /run, that | |
836 | * uses the device/inode number. This has the benefit that we | |
837 | * can even lock a tree that is a mount point, correctly. */ | |
838 | ||
30535c16 LP |
839 | if (!path_is_absolute(path)) |
840 | return -EINVAL; | |
841 | ||
b6e953f2 LP |
842 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
843 | *local = *global = (LockFile) LOCK_FILE_INIT; | |
844 | return 0; | |
845 | } | |
846 | ||
847 | if (path_equal(path, "/")) | |
848 | return -EBUSY; | |
849 | ||
30535c16 | 850 | if (stat(path, &st) >= 0) { |
eb38edce LP |
851 | if (S_ISBLK(st.st_mode)) |
852 | r = asprintf(&p, "/run/systemd/nspawn/locks/block-%u:%u", major(st.st_rdev), minor(st.st_rdev)); | |
853 | else if (S_ISDIR(st.st_mode) || S_ISREG(st.st_mode)) | |
854 | r = asprintf(&p, "/run/systemd/nspawn/locks/inode-%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino); | |
855 | else | |
856 | return -ENOTTY; | |
857 | ||
858 | if (r < 0) | |
30535c16 LP |
859 | return -ENOMEM; |
860 | } | |
861 | ||
eb38edce LP |
862 | /* For block devices we don't need the "local" lock, as the major/minor lock above should be sufficient, since |
863 | * block devices are device local anyway. */ | |
864 | if (!path_startswith(path, "/dev")) { | |
865 | r = make_lock_file_for(path, operation, &t); | |
8be17c9b LT |
866 | if (r < 0) { |
867 | if ((operation & LOCK_SH) && r == -EROFS) | |
771b7ead | 868 | log_debug_errno(r, "Failed to create shared lock for '%s', ignoring: %m", path); |
8be17c9b LT |
869 | else |
870 | return r; | |
871 | } | |
eb38edce | 872 | } |
30535c16 LP |
873 | |
874 | if (p) { | |
7e7cddb2 | 875 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
30535c16 LP |
876 | |
877 | r = make_lock_file(p, operation, global); | |
878 | if (r < 0) { | |
879 | release_lock_file(&t); | |
880 | return r; | |
881 | } | |
546dbec5 LP |
882 | } else |
883 | *global = (LockFile) LOCK_FILE_INIT; | |
30535c16 LP |
884 | |
885 | *local = t; | |
886 | return 0; | |
887 | } | |
888 | ||
cb81cd80 | 889 | int image_set_limit(Image *i, uint64_t referenced_max) { |
d6ce17c7 LP |
890 | assert(i); |
891 | ||
d94c2b06 | 892 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
d6ce17c7 LP |
893 | return -EROFS; |
894 | ||
895 | if (i->type != IMAGE_SUBVOLUME) | |
15411c0c | 896 | return -EOPNOTSUPP; |
d6ce17c7 | 897 | |
5bcd08db LP |
898 | /* We set the quota both for the subvolume as well as for the |
899 | * subtree. The latter is mostly for historical reasons, since | |
900 | * we didn't use to have a concept of subtree quota, and hence | |
901 | * only modified the subvolume quota. */ | |
902 | ||
903 | (void) btrfs_qgroup_set_limit(i->path, 0, referenced_max); | |
904 | (void) btrfs_subvol_auto_qgroup(i->path, 0, true); | |
905 | return btrfs_subvol_set_subtree_quota_limit(i->path, 0, referenced_max); | |
d6ce17c7 LP |
906 | } |
907 | ||
c7664c07 | 908 | int image_read_metadata(Image *i) { |
8e766630 | 909 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
c7664c07 LP |
910 | int r; |
911 | ||
912 | assert(i); | |
913 | ||
914 | r = image_path_lock(i->path, LOCK_SH|LOCK_NB, &global_lock, &local_lock); | |
915 | if (r < 0) | |
916 | return r; | |
917 | ||
918 | switch (i->type) { | |
919 | ||
920 | case IMAGE_SUBVOLUME: | |
921 | case IMAGE_DIRECTORY: { | |
922 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL; | |
923 | sd_id128_t machine_id = SD_ID128_NULL; | |
924 | _cleanup_free_ char *hostname = NULL; | |
925 | _cleanup_free_ char *path = NULL; | |
926 | ||
62570f6f | 927 | r = chase_symlinks("/etc/hostname", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
928 | if (r < 0 && r != -ENOENT) |
929 | log_debug_errno(r, "Failed to chase /etc/hostname in image %s: %m", i->name); | |
930 | else if (r >= 0) { | |
931 | r = read_etc_hostname(path, &hostname); | |
932 | if (r < 0) | |
933 | log_debug_errno(errno, "Failed to read /etc/hostname of image %s: %m", i->name); | |
934 | } | |
935 | ||
936 | path = mfree(path); | |
937 | ||
62570f6f | 938 | r = chase_symlinks("/etc/machine-id", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
939 | if (r < 0 && r != -ENOENT) |
940 | log_debug_errno(r, "Failed to chase /etc/machine-id in image %s: %m", i->name); | |
941 | else if (r >= 0) { | |
942 | _cleanup_close_ int fd = -1; | |
943 | ||
944 | fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
945 | if (fd < 0) | |
946 | log_debug_errno(errno, "Failed to open %s: %m", path); | |
947 | else { | |
948 | r = id128_read_fd(fd, ID128_PLAIN, &machine_id); | |
949 | if (r < 0) | |
950 | log_debug_errno(r, "Image %s contains invalid machine ID.", i->name); | |
951 | } | |
952 | } | |
953 | ||
954 | path = mfree(path); | |
955 | ||
62570f6f | 956 | r = chase_symlinks("/etc/machine-info", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
957 | if (r < 0 && r != -ENOENT) |
958 | log_debug_errno(r, "Failed to chase /etc/machine-info in image %s: %m", i->name); | |
959 | else if (r >= 0) { | |
960 | r = load_env_file_pairs(NULL, path, NULL, &machine_info); | |
961 | if (r < 0) | |
962 | log_debug_errno(r, "Failed to parse machine-info data of %s: %m", i->name); | |
963 | } | |
964 | ||
965 | path = mfree(path); | |
966 | ||
62570f6f | 967 | r = chase_symlinks("/etc/os-release", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 | 968 | if (r == -ENOENT) |
62570f6f | 969 | r = chase_symlinks("/usr/lib/os-release", 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 os-release in image: %m"); | |
972 | else if (r >= 0) { | |
973 | r = load_env_file_pairs(NULL, path, NULL, &os_release); | |
974 | if (r < 0) | |
975 | log_debug_errno(r, "Failed to parse os-release data of %s: %m", i->name); | |
976 | } | |
977 | ||
978 | free_and_replace(i->hostname, hostname); | |
979 | i->machine_id = machine_id; | |
980 | strv_free_and_replace(i->machine_info, machine_info); | |
981 | strv_free_and_replace(i->os_release, os_release); | |
982 | ||
983 | break; | |
984 | } | |
985 | ||
986 | case IMAGE_RAW: | |
987 | case IMAGE_BLOCK: { | |
988 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
989 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
990 | ||
991 | r = loop_device_make_by_path(i->path, O_RDONLY, &d); | |
992 | if (r < 0) | |
993 | return r; | |
994 | ||
995 | r = dissect_image(d->fd, NULL, 0, DISSECT_IMAGE_REQUIRE_ROOT, &m); | |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
999 | r = dissected_image_acquire_metadata(m); | |
1000 | if (r < 0) | |
1001 | return r; | |
1002 | ||
1003 | free_and_replace(i->hostname, m->hostname); | |
1004 | i->machine_id = m->machine_id; | |
1005 | strv_free_and_replace(i->machine_info, m->machine_info); | |
1006 | strv_free_and_replace(i->os_release, m->os_release); | |
1007 | ||
1008 | break; | |
1009 | } | |
1010 | ||
1011 | default: | |
1012 | return -EOPNOTSUPP; | |
1013 | } | |
1014 | ||
1015 | i->metadata_valid = true; | |
1016 | ||
1017 | return 0; | |
1018 | } | |
1019 | ||
30535c16 LP |
1020 | int image_name_lock(const char *name, int operation, LockFile *ret) { |
1021 | const char *p; | |
1022 | ||
1023 | assert(name); | |
1024 | assert(ret); | |
1025 | ||
1026 | /* Locks an image name, regardless of the precise path used. */ | |
1027 | ||
1028 | if (!image_name_is_valid(name)) | |
1029 | return -EINVAL; | |
1030 | ||
b6e953f2 LP |
1031 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
1032 | *ret = (LockFile) LOCK_FILE_INIT; | |
1033 | return 0; | |
1034 | } | |
1035 | ||
30535c16 LP |
1036 | if (streq(name, ".host")) |
1037 | return -EBUSY; | |
1038 | ||
7e7cddb2 | 1039 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
63c372cb | 1040 | p = strjoina("/run/systemd/nspawn/locks/name-", name); |
30535c16 LP |
1041 | |
1042 | return make_lock_file(p, operation, ret); | |
1043 | } | |
1044 | ||
1045 | bool image_name_is_valid(const char *s) { | |
1046 | if (!filename_is_valid(s)) | |
1047 | return false; | |
1048 | ||
1049 | if (string_has_cc(s, NULL)) | |
1050 | return false; | |
1051 | ||
1052 | if (!utf8_is_valid(s)) | |
1053 | return false; | |
1054 | ||
1055 | /* Temporary files for atomically creating new files */ | |
1056 | if (startswith(s, ".#")) | |
1057 | return false; | |
1058 | ||
1059 | return true; | |
1060 | } | |
1061 | ||
cd61c3bf LP |
1062 | static const char* const image_type_table[_IMAGE_TYPE_MAX] = { |
1063 | [IMAGE_DIRECTORY] = "directory", | |
1064 | [IMAGE_SUBVOLUME] = "subvolume", | |
aceac2f0 | 1065 | [IMAGE_RAW] = "raw", |
eb38edce | 1066 | [IMAGE_BLOCK] = "block", |
cd61c3bf LP |
1067 | }; |
1068 | ||
1069 | DEFINE_STRING_TABLE_LOOKUP(image_type, ImageType); |