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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
cd61c3bf | 2 | |
a8fbdf54 | 3 | #include <errno.h> |
ebd93cb6 | 4 | #include <fcntl.h> |
e08f94ac LP |
5 | #include <linux/fs.h> |
6 | #include <linux/loop.h> | |
65ddc2c5 | 7 | #include <linux/magic.h> |
a8fbdf54 TA |
8 | #include <stdio.h> |
9 | #include <stdlib.h> | |
e306723e | 10 | #include <sys/file.h> |
204f52e3 | 11 | #include <sys/ioctl.h> |
a8fbdf54 TA |
12 | #include <sys/stat.h> |
13 | #include <unistd.h> | |
546dbec5 | 14 | |
b5efdb8a | 15 | #include "alloc-util.h" |
01db9c85 | 16 | #include "blockdev-util.h" |
cd61c3bf | 17 | #include "btrfs-util.h" |
f461a28d | 18 | #include "chase.h" |
c8b3094d | 19 | #include "chattr-util.h" |
ebd93cb6 | 20 | #include "copy.h" |
a0956174 | 21 | #include "dirent-util.h" |
57f1b61b | 22 | #include "discover-image.h" |
c7664c07 | 23 | #include "dissect-image.h" |
686d13b9 | 24 | #include "env-file.h" |
b6e953f2 | 25 | #include "env-util.h" |
6afa5d86 | 26 | #include "extension-util.h" |
3ffd4af2 | 27 | #include "fd-util.h" |
f4f15635 | 28 | #include "fs-util.h" |
a8fbdf54 | 29 | #include "hashmap.h" |
e2054217 | 30 | #include "hostname-setup.h" |
c7664c07 | 31 | #include "id128-util.h" |
73740c9f | 32 | #include "initrd-util.h" |
64e89f56 | 33 | #include "lock-util.h" |
a8fbdf54 | 34 | #include "log.h" |
c7664c07 | 35 | #include "loop-util.h" |
546dbec5 | 36 | #include "macro.h" |
30535c16 | 37 | #include "mkdir.h" |
d8b4d14d | 38 | #include "nulstr-util.h" |
d58ad743 | 39 | #include "os-util.h" |
8e0b6570 | 40 | #include "path-util.h" |
c6878637 | 41 | #include "rm-rf.h" |
65ddc2c5 | 42 | #include "stat-util.h" |
8b43440b | 43 | #include "string-table.h" |
07630cea | 44 | #include "string-util.h" |
8e0b6570 | 45 | #include "strv.h" |
a8fbdf54 | 46 | #include "time-util.h" |
8e0b6570 | 47 | #include "utf8.h" |
a5ecdf7c | 48 | #include "vpick.h" |
89a5a90c | 49 | #include "xattr-util.h" |
cd61c3bf | 50 | |
f7178a04 | 51 | const char* const image_search_path[_IMAGE_CLASS_MAX] = { |
9bca4ae4 LP |
52 | [IMAGE_MACHINE] = "/etc/machines\0" /* only place symlinks here */ |
53 | "/run/machines\0" /* and here too */ | |
54 | "/var/lib/machines\0" /* the main place for images */ | |
55 | "/var/lib/container\0" /* legacy */ | |
56 | "/usr/local/lib/machines\0" | |
57 | "/usr/lib/machines\0", | |
5ef46e5f | 58 | |
9bca4ae4 LP |
59 | [IMAGE_PORTABLE] = "/etc/portables\0" /* only place symlinks here */ |
60 | "/run/portables\0" /* and here too */ | |
61 | "/var/lib/portables\0" /* the main place for images */ | |
62 | "/usr/local/lib/portables\0" | |
63 | "/usr/lib/portables\0", | |
64 | ||
de862276 LB |
65 | /* Note that we don't allow storing extensions under /usr/, unlike with other image types. That's |
66 | * because extension images are supposed to extend /usr/, so you get into recursive races, especially | |
67 | * with directory-based extensions, as the kernel's OverlayFS explicitly checks for this and errors | |
68 | * out with -ELOOP if it finds that a lowerdir= is a child of another lowerdir=. */ | |
b60e0f57 | 69 | [IMAGE_SYSEXT] = "/etc/extensions\0" /* only place symlinks here */ |
70 | "/run/extensions\0" /* and here too */ | |
71 | "/var/lib/extensions\0", /* the main place for images */ | |
72 | ||
73 | [IMAGE_CONFEXT] = "/run/confexts\0" /* only place symlinks here */ | |
74 | "/var/lib/confexts\0" /* the main place for images */ | |
75 | "/usr/local/lib/confexts\0" | |
76 | "/usr/lib/confexts\0", | |
5ef46e5f | 77 | }; |
c2ce6a3d | 78 | |
d4fee894 LP |
79 | /* Inside the initrd, use a slightly different set of search path (i.e. include .extra/sysext/ and |
80 | * .extra/confext/ in extension search dir) */ | |
73740c9f LP |
81 | static const char* const image_search_path_initrd[_IMAGE_CLASS_MAX] = { |
82 | /* (entries that aren't listed here will get the same search path as for the non initrd-case) */ | |
83 | ||
b151e696 LP |
84 | [IMAGE_SYSEXT] = "/etc/extensions\0" /* only place symlinks here */ |
85 | "/run/extensions\0" /* and here too */ | |
86 | "/var/lib/extensions\0" /* the main place for images */ | |
d4fee894 LP |
87 | "/.extra/sysext\0", /* put sysext picked up by systemd-stub last, since not trusted */ |
88 | ||
89 | [IMAGE_CONFEXT] = "/run/confexts\0" /* only place symlinks here */ | |
90 | "/var/lib/confexts\0" /* the main place for images */ | |
91 | "/usr/local/lib/confexts\0" | |
92 | "/.extra/confext\0", /* put confext picked up by systemd-stub last, since not trusted */ | |
73740c9f LP |
93 | }; |
94 | ||
a747994b LP |
95 | static const char* image_class_suffix_table[_IMAGE_CLASS_MAX] = { |
96 | [IMAGE_SYSEXT] = ".sysext", | |
97 | [IMAGE_CONFEXT] = ".confext", | |
98 | }; | |
99 | ||
100 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(image_class_suffix, ImageClass); | |
101 | ||
7af5785d LP |
102 | static const char *const image_root_table[_IMAGE_CLASS_MAX] = { |
103 | [IMAGE_MACHINE] = "/var/lib/machines", | |
104 | [IMAGE_PORTABLE] = "/var/lib/portables", | |
105 | [IMAGE_SYSEXT] = "/var/lib/extensions", | |
106 | [IMAGE_CONFEXT] = "/var/lib/confexts", | |
107 | }; | |
108 | ||
109 | DEFINE_STRING_TABLE_LOOKUP_TO_STRING(image_root, ImageClass); | |
110 | ||
8301aa0b YW |
111 | static Image *image_free(Image *i) { |
112 | assert(i); | |
9614bb06 | 113 | |
cd61c3bf LP |
114 | free(i->name); |
115 | free(i->path); | |
c7664c07 LP |
116 | |
117 | free(i->hostname); | |
118 | strv_free(i->machine_info); | |
119 | strv_free(i->os_release); | |
a81fe93e LP |
120 | strv_free(i->sysext_release); |
121 | strv_free(i->confext_release); | |
c7664c07 | 122 | |
6b430fdb | 123 | return mfree(i); |
cd61c3bf LP |
124 | } |
125 | ||
8301aa0b | 126 | DEFINE_TRIVIAL_REF_UNREF_FUNC(Image, image, image_free); |
b07ec5a1 YW |
127 | DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(image_hash_ops, char, string_hash_func, string_compare_func, |
128 | Image, image_unref); | |
9614bb06 | 129 | |
8e0b6570 LP |
130 | static char **image_settings_path(Image *image) { |
131 | _cleanup_strv_free_ char **l = NULL; | |
162f6477 LP |
132 | _cleanup_free_ char *fn = NULL; |
133 | size_t i = 0; | |
134 | int r; | |
8e0b6570 LP |
135 | |
136 | assert(image); | |
137 | ||
138 | l = new0(char*, 4); | |
139 | if (!l) | |
140 | return NULL; | |
141 | ||
162f6477 LP |
142 | fn = strjoin(image->name, ".nspawn"); |
143 | if (!fn) | |
144 | return NULL; | |
8e0b6570 | 145 | |
b910cc72 LP |
146 | FOREACH_STRING(s, "/etc/systemd/nspawn", "/run/systemd/nspawn") { |
147 | l[i] = path_join(s, fn); | |
8e0b6570 LP |
148 | if (!l[i]) |
149 | return NULL; | |
150 | ||
151 | i++; | |
152 | } | |
153 | ||
162f6477 LP |
154 | r = file_in_same_dir(image->path, fn, l + i); |
155 | if (r == -ENOMEM) | |
8e0b6570 | 156 | return NULL; |
162f6477 LP |
157 | if (r < 0) |
158 | log_debug_errno(r, "Failed to generate .nspawn settings path from image path, ignoring: %m"); | |
159 | ||
160 | strv_uniq(l); | |
8e0b6570 | 161 | |
ae2a15bc | 162 | return TAKE_PTR(l); |
8e0b6570 LP |
163 | } |
164 | ||
162f6477 LP |
165 | static int image_roothash_path(Image *image, char **ret) { |
166 | _cleanup_free_ char *fn = NULL; | |
bafbac4e LP |
167 | |
168 | assert(image); | |
169 | ||
162f6477 LP |
170 | fn = strjoin(image->name, ".roothash"); |
171 | if (!fn) | |
172 | return -ENOMEM; | |
bafbac4e | 173 | |
162f6477 | 174 | return file_in_same_dir(image->path, fn, ret); |
bafbac4e LP |
175 | } |
176 | ||
c2ce6a3d | 177 | static int image_new( |
cd61c3bf | 178 | ImageType t, |
3775e141 | 179 | ImageClass c, |
5fc7f358 | 180 | const char *pretty, |
cd61c3bf | 181 | const char *path, |
5fc7f358 | 182 | const char *filename, |
cd61c3bf | 183 | bool read_only, |
10f9c755 | 184 | usec_t crtime, |
cd61c3bf | 185 | usec_t mtime, |
c2ce6a3d | 186 | Image **ret) { |
cd61c3bf LP |
187 | |
188 | _cleanup_(image_unrefp) Image *i = NULL; | |
cd61c3bf | 189 | |
cd61c3bf LP |
190 | assert(t >= 0); |
191 | assert(t < _IMAGE_TYPE_MAX); | |
5fc7f358 LP |
192 | assert(pretty); |
193 | assert(filename); | |
c2ce6a3d | 194 | assert(ret); |
cd61c3bf | 195 | |
c2108701 | 196 | i = new(Image, 1); |
cd61c3bf LP |
197 | if (!i) |
198 | return -ENOMEM; | |
199 | ||
c2108701 LP |
200 | *i = (Image) { |
201 | .n_ref = 1, | |
202 | .type = t, | |
3775e141 | 203 | .class = c, |
c2108701 LP |
204 | .read_only = read_only, |
205 | .crtime = crtime, | |
206 | .mtime = mtime, | |
207 | .usage = UINT64_MAX, | |
208 | .usage_exclusive = UINT64_MAX, | |
209 | .limit = UINT64_MAX, | |
210 | .limit_exclusive = UINT64_MAX, | |
211 | }; | |
cd61c3bf | 212 | |
5fc7f358 | 213 | i->name = strdup(pretty); |
cd61c3bf LP |
214 | if (!i->name) |
215 | return -ENOMEM; | |
216 | ||
657ee2d8 | 217 | i->path = path_join(path, filename); |
5fc7f358 LP |
218 | if (!i->path) |
219 | return -ENOMEM; | |
220 | ||
4ff361cc | 221 | path_simplify(i->path); |
cd61c3bf | 222 | |
1cc6c93a | 223 | *ret = TAKE_PTR(i); |
c2ce6a3d | 224 | |
cd61c3bf LP |
225 | return 0; |
226 | } | |
227 | ||
a5ecdf7c | 228 | static int extract_image_basename( |
a747994b | 229 | const char *path, |
a5ecdf7c LP |
230 | const char *class_suffix, /* e.g. ".sysext" (this is an optional suffix) */ |
231 | char **format_suffixes, /* e.g. ".raw" (one of these will be required) */ | |
232 | char **ret_basename, | |
233 | char **ret_suffix) { | |
a747994b | 234 | |
a5ecdf7c | 235 | _cleanup_free_ char *name = NULL, *suffix = NULL; |
a747994b | 236 | int r; |
4756c94e LP |
237 | |
238 | assert(path); | |
4756c94e | 239 | |
a747994b LP |
240 | r = path_extract_filename(path, &name); |
241 | if (r < 0) | |
242 | return r; | |
4756c94e | 243 | |
a5ecdf7c | 244 | if (format_suffixes) { |
2e6f012b | 245 | char *e = endswith_strv(name, format_suffixes); |
a747994b | 246 | if (!e) /* Format suffix is required */ |
4756c94e LP |
247 | return -EINVAL; |
248 | ||
a5ecdf7c LP |
249 | if (ret_suffix) { |
250 | suffix = strdup(e); | |
251 | if (!suffix) | |
252 | return -ENOMEM; | |
253 | } | |
254 | ||
4756c94e LP |
255 | *e = 0; |
256 | } | |
257 | ||
a747994b LP |
258 | if (class_suffix) { |
259 | char *e = endswith(name, class_suffix); | |
a5ecdf7c LP |
260 | if (e) { /* Class suffix is optional */ |
261 | if (ret_suffix) { | |
262 | _cleanup_free_ char *j = strjoin(e, suffix); | |
263 | if (!j) | |
264 | return -ENOMEM; | |
265 | ||
266 | free_and_replace(suffix, j); | |
267 | } | |
268 | ||
a747994b | 269 | *e = 0; |
a5ecdf7c | 270 | } |
a747994b LP |
271 | } |
272 | ||
4756c94e LP |
273 | if (!image_name_is_valid(name)) |
274 | return -EINVAL; | |
275 | ||
a5ecdf7c LP |
276 | if (ret_suffix) |
277 | *ret_suffix = TAKE_PTR(suffix); | |
278 | ||
279 | if (ret_basename) | |
280 | *ret_basename = TAKE_PTR(name); | |
281 | ||
4756c94e LP |
282 | return 0; |
283 | } | |
284 | ||
5fc7f358 | 285 | static int image_make( |
3775e141 | 286 | ImageClass c, |
5fc7f358 LP |
287 | const char *pretty, |
288 | int dfd, | |
289 | const char *path, | |
290 | const char *filename, | |
3a6ce860 | 291 | const struct stat *st, |
5fc7f358 LP |
292 | Image **ret) { |
293 | ||
2570578d | 294 | _cleanup_free_ char *pretty_buffer = NULL, *parent = NULL; |
3a6ce860 | 295 | struct stat stbuf; |
5fc7f358 | 296 | bool read_only; |
cd61c3bf LP |
297 | int r; |
298 | ||
3a6ce860 | 299 | assert(dfd >= 0 || dfd == AT_FDCWD); |
bcb846f3 | 300 | assert(path || dfd == AT_FDCWD); |
5fc7f358 | 301 | assert(filename); |
cd61c3bf | 302 | |
eb38edce | 303 | /* We explicitly *do* follow symlinks here, since we want to allow symlinking trees, raw files and block |
3a6ce860 LP |
304 | * devices into /var/lib/machines/, and treat them normally. |
305 | * | |
306 | * This function returns -ENOENT if we can't find the image after all, and -EMEDIUMTYPE if it's not a file we | |
307 | * recognize. */ | |
cd61c3bf | 308 | |
3a6ce860 LP |
309 | if (!st) { |
310 | if (fstatat(dfd, filename, &stbuf, 0) < 0) | |
311 | return -errno; | |
312 | ||
313 | st = &stbuf; | |
314 | } | |
cd61c3bf | 315 | |
2570578d LP |
316 | if (!path) { |
317 | if (dfd == AT_FDCWD) | |
318 | (void) safe_getcwd(&parent); | |
319 | else | |
320 | (void) fd_get_path(dfd, &parent); | |
321 | } | |
bcb846f3 | 322 | |
5fc7f358 LP |
323 | read_only = |
324 | (path && path_startswith(path, "/usr")) || | |
08ff5529 | 325 | (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS); |
86e339c8 | 326 | |
3a6ce860 | 327 | if (S_ISDIR(st->st_mode)) { |
254d1313 | 328 | _cleanup_close_ int fd = -EBADF; |
01b72568 | 329 | unsigned file_attr = 0; |
02dcf215 | 330 | usec_t crtime = 0; |
cd61c3bf | 331 | |
c2ce6a3d | 332 | if (!ret) |
3a6ce860 | 333 | return 0; |
cd61c3bf | 334 | |
4756c94e | 335 | if (!pretty) { |
a5ecdf7c LP |
336 | r = extract_image_basename( |
337 | filename, | |
338 | image_class_suffix_to_string(c), | |
339 | /* format_suffix= */ NULL, | |
340 | &pretty_buffer, | |
341 | /* ret_suffix= */ NULL); | |
4756c94e LP |
342 | if (r < 0) |
343 | return r; | |
344 | ||
345 | pretty = pretty_buffer; | |
346 | } | |
5fc7f358 | 347 | |
01b72568 LP |
348 | fd = openat(dfd, filename, O_CLOEXEC|O_NOCTTY|O_DIRECTORY); |
349 | if (fd < 0) | |
350 | return -errno; | |
351 | ||
674b04ff | 352 | if (btrfs_might_be_subvol(st)) { |
cd61c3bf | 353 | |
65ddc2c5 | 354 | r = fd_is_fs_type(fd, BTRFS_SUPER_MAGIC); |
21222ea5 LP |
355 | if (r < 0) |
356 | return r; | |
79de6eb1 | 357 | if (r > 0) { |
10f9c755 | 358 | BtrfsSubvolInfo info; |
cd61c3bf | 359 | |
c2ce6a3d | 360 | /* It's a btrfs subvolume */ |
cd61c3bf | 361 | |
5bcd08db | 362 | r = btrfs_subvol_get_info_fd(fd, 0, &info); |
10f9c755 LP |
363 | if (r < 0) |
364 | return r; | |
c2ce6a3d LP |
365 | |
366 | r = image_new(IMAGE_SUBVOLUME, | |
3775e141 | 367 | c, |
5fc7f358 | 368 | pretty, |
c2ce6a3d | 369 | path, |
5fc7f358 LP |
370 | filename, |
371 | info.read_only || read_only, | |
10f9c755 | 372 | info.otime, |
c2ce6a3d | 373 | 0, |
c2ce6a3d LP |
374 | ret); |
375 | if (r < 0) | |
376 | return r; | |
377 | ||
5bcd08db LP |
378 | if (btrfs_quota_scan_ongoing(fd) == 0) { |
379 | BtrfsQuotaInfo quota; | |
b6b18498 | 380 | |
5bcd08db LP |
381 | r = btrfs_subvol_get_subtree_quota_fd(fd, 0, "a); |
382 | if (r >= 0) { | |
383 | (*ret)->usage = quota.referenced; | |
384 | (*ret)->usage_exclusive = quota.exclusive; | |
385 | ||
386 | (*ret)->limit = quota.referenced_max; | |
387 | (*ret)->limit_exclusive = quota.exclusive_max; | |
388 | } | |
b6b18498 LP |
389 | } |
390 | ||
3a6ce860 | 391 | return 0; |
cd61c3bf | 392 | } |
c2ce6a3d | 393 | } |
cd61c3bf | 394 | |
02dcf215 | 395 | /* Get directory creation time (not available everywhere, but that's OK */ |
12a7f04a | 396 | (void) fd_getcrtime(fd, &crtime); |
02dcf215 LP |
397 | |
398 | /* If the IMMUTABLE bit is set, we consider the directory read-only. Since the ioctl is not | |
01b72568 LP |
399 | * supported everywhere we ignore failures. */ |
400 | (void) read_attr_fd(fd, &file_attr); | |
cd61c3bf | 401 | |
01b72568 | 402 | /* It's just a normal directory. */ |
c2ce6a3d | 403 | r = image_new(IMAGE_DIRECTORY, |
3775e141 | 404 | c, |
5fc7f358 | 405 | pretty, |
c2ce6a3d | 406 | path, |
5fc7f358 | 407 | filename, |
01b72568 | 408 | read_only || (file_attr & FS_IMMUTABLE_FL), |
02dcf215 LP |
409 | crtime, |
410 | 0, /* we don't use mtime of stat() here, since it's not the time of last change of the tree, but only of the top-level dir */ | |
c2ce6a3d LP |
411 | ret); |
412 | if (r < 0) | |
413 | return r; | |
cd61c3bf | 414 | |
3a6ce860 | 415 | return 0; |
cd61c3bf | 416 | |
3a6ce860 | 417 | } else if (S_ISREG(st->st_mode) && endswith(filename, ".raw")) { |
10f9c755 | 418 | usec_t crtime = 0; |
cd61c3bf | 419 | |
aceac2f0 | 420 | /* It's a RAW disk image */ |
cd61c3bf | 421 | |
c2ce6a3d | 422 | if (!ret) |
3a6ce860 | 423 | return 0; |
cd61c3bf | 424 | |
c53e07e2 | 425 | (void) fd_getcrtime_at(dfd, filename, AT_SYMLINK_FOLLOW, &crtime); |
10f9c755 | 426 | |
4756c94e | 427 | if (!pretty) { |
a5ecdf7c LP |
428 | r = extract_image_basename( |
429 | filename, | |
430 | image_class_suffix_to_string(c), | |
431 | STRV_MAKE(".raw"), | |
432 | &pretty_buffer, | |
433 | /* ret_suffix= */ NULL); | |
4756c94e LP |
434 | if (r < 0) |
435 | return r; | |
436 | ||
437 | pretty = pretty_buffer; | |
438 | } | |
10f9c755 | 439 | |
aceac2f0 | 440 | r = image_new(IMAGE_RAW, |
3775e141 | 441 | c, |
5fc7f358 | 442 | pretty, |
c2ce6a3d | 443 | path, |
5fc7f358 | 444 | filename, |
3a6ce860 | 445 | !(st->st_mode & 0222) || read_only, |
10f9c755 | 446 | crtime, |
3a6ce860 | 447 | timespec_load(&st->st_mtim), |
c2ce6a3d LP |
448 | ret); |
449 | if (r < 0) | |
450 | return r; | |
cd61c3bf | 451 | |
3a6ce860 LP |
452 | (*ret)->usage = (*ret)->usage_exclusive = st->st_blocks * 512; |
453 | (*ret)->limit = (*ret)->limit_exclusive = st->st_size; | |
b6b18498 | 454 | |
3a6ce860 | 455 | return 0; |
eb38edce | 456 | |
3a6ce860 | 457 | } else if (S_ISBLK(st->st_mode)) { |
254d1313 | 458 | _cleanup_close_ int block_fd = -EBADF; |
eb38edce LP |
459 | uint64_t size = UINT64_MAX; |
460 | ||
461 | /* A block device */ | |
462 | ||
463 | if (!ret) | |
3a6ce860 | 464 | return 0; |
eb38edce | 465 | |
4756c94e | 466 | if (!pretty) { |
a5ecdf7c LP |
467 | r = extract_image_basename( |
468 | filename, | |
469 | /* class_suffix= */ NULL, | |
470 | /* format_suffix= */ NULL, | |
471 | &pretty_buffer, | |
472 | /* ret_suffix= */ NULL); | |
4756c94e LP |
473 | if (r < 0) |
474 | return r; | |
475 | ||
476 | pretty = pretty_buffer; | |
477 | } | |
eb38edce LP |
478 | |
479 | block_fd = openat(dfd, filename, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY); | |
480 | if (block_fd < 0) | |
2570578d | 481 | log_debug_errno(errno, "Failed to open block device %s/%s, ignoring: %m", path ?: strnull(parent), filename); |
eb38edce | 482 | else { |
3a6ce860 LP |
483 | /* Refresh stat data after opening the node */ |
484 | if (fstat(block_fd, &stbuf) < 0) | |
eb38edce | 485 | return -errno; |
3a6ce860 LP |
486 | st = &stbuf; |
487 | ||
488 | if (!S_ISBLK(st->st_mode)) /* Verify that what we opened is actually what we think it is */ | |
eb38edce LP |
489 | return -ENOTTY; |
490 | ||
491 | if (!read_only) { | |
492 | int state = 0; | |
493 | ||
494 | if (ioctl(block_fd, BLKROGET, &state) < 0) | |
2570578d | 495 | log_debug_errno(errno, "Failed to issue BLKROGET on device %s/%s, ignoring: %m", path ?: strnull(parent), filename); |
eb38edce LP |
496 | else if (state) |
497 | read_only = true; | |
498 | } | |
499 | ||
01db9c85 LP |
500 | r = blockdev_get_device_size(block_fd, &size); |
501 | if (r < 0) | |
502 | log_debug_errno(r, "Failed to issue BLKGETSIZE64 on device %s/%s, ignoring: %m", path ?: strnull(parent), filename); | |
eb38edce LP |
503 | |
504 | block_fd = safe_close(block_fd); | |
505 | } | |
506 | ||
507 | r = image_new(IMAGE_BLOCK, | |
3775e141 | 508 | c, |
eb38edce LP |
509 | pretty, |
510 | path, | |
511 | filename, | |
3a6ce860 | 512 | !(st->st_mode & 0222) || read_only, |
eb38edce LP |
513 | 0, |
514 | 0, | |
515 | ret); | |
516 | if (r < 0) | |
517 | return r; | |
518 | ||
ed0cb346 | 519 | if (!IN_SET(size, 0, UINT64_MAX)) |
eb38edce LP |
520 | (*ret)->usage = (*ret)->usage_exclusive = (*ret)->limit = (*ret)->limit_exclusive = size; |
521 | ||
3a6ce860 | 522 | return 0; |
c2ce6a3d | 523 | } |
cd61c3bf | 524 | |
3a6ce860 | 525 | return -EMEDIUMTYPE; |
c2ce6a3d | 526 | } |
cd61c3bf | 527 | |
73740c9f LP |
528 | static const char *pick_image_search_path(ImageClass class) { |
529 | if (class < 0 || class >= _IMAGE_CLASS_MAX) | |
530 | return NULL; | |
531 | ||
532 | /* Use the initrd search path if there is one, otherwise use the common one */ | |
533 | return in_initrd() && image_search_path_initrd[class] ? image_search_path_initrd[class] : image_search_path[class]; | |
534 | } | |
535 | ||
a5ecdf7c LP |
536 | static char **make_possible_filenames(ImageClass class, const char *image_name) { |
537 | _cleanup_strv_free_ char **l = NULL; | |
538 | ||
539 | assert(image_name); | |
540 | ||
541 | FOREACH_STRING(v_suffix, "", ".v") | |
542 | FOREACH_STRING(format_suffix, "", ".raw") { | |
543 | _cleanup_free_ char *j = NULL; | |
544 | const char *class_suffix; | |
545 | ||
546 | class_suffix = image_class_suffix_to_string(class); | |
547 | if (class_suffix) { | |
548 | j = strjoin(image_name, class_suffix, format_suffix, v_suffix); | |
549 | if (!j) | |
550 | return NULL; | |
551 | ||
552 | if (strv_consume(&l, TAKE_PTR(j)) < 0) | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | j = strjoin(image_name, format_suffix, v_suffix); | |
557 | if (!j) | |
558 | return NULL; | |
559 | ||
560 | if (strv_consume(&l, TAKE_PTR(j)) < 0) | |
561 | return NULL; | |
562 | } | |
563 | ||
564 | return TAKE_PTR(l); | |
565 | } | |
566 | ||
d577d4a4 LP |
567 | int image_find(ImageClass class, |
568 | const char *name, | |
569 | const char *root, | |
570 | Image **ret) { | |
571 | ||
c2ce6a3d | 572 | int r; |
cd61c3bf | 573 | |
5ef46e5f LP |
574 | assert(class >= 0); |
575 | assert(class < _IMAGE_CLASS_MAX); | |
c2ce6a3d | 576 | assert(name); |
cd61c3bf | 577 | |
c2ce6a3d LP |
578 | /* There are no images with invalid names */ |
579 | if (!image_name_is_valid(name)) | |
3a6ce860 | 580 | return -ENOENT; |
cd61c3bf | 581 | |
a5ecdf7c LP |
582 | _cleanup_strv_free_ char **names = make_possible_filenames(class, name); |
583 | if (!names) | |
584 | return -ENOMEM; | |
585 | ||
73740c9f | 586 | NULSTR_FOREACH(path, pick_image_search_path(class)) { |
d577d4a4 | 587 | _cleanup_free_ char *resolved = NULL; |
c2ce6a3d | 588 | _cleanup_closedir_ DIR *d = NULL; |
3a6ce860 | 589 | struct stat st; |
d577d4a4 | 590 | int flags; |
cd61c3bf | 591 | |
f461a28d | 592 | r = chase_and_opendir(path, root, CHASE_PREFIX_ROOT, &resolved, &d); |
d577d4a4 LP |
593 | if (r == -ENOENT) |
594 | continue; | |
595 | if (r < 0) | |
596 | return r; | |
cd61c3bf | 597 | |
d577d4a4 LP |
598 | /* As mentioned above, we follow symlinks on this fstatat(), because we want to permit people |
599 | * to symlink block devices into the search path. (For now, we disable that when operating | |
600 | * relative to some root directory.) */ | |
601 | flags = root ? AT_SYMLINK_NOFOLLOW : 0; | |
5fc7f358 | 602 | |
a5ecdf7c LP |
603 | STRV_FOREACH(n, names) { |
604 | _cleanup_free_ char *fname_buf = NULL; | |
605 | const char *fname = *n; | |
3a6ce860 | 606 | |
a5ecdf7c LP |
607 | if (fstatat(dirfd(d), fname, &st, flags) < 0) { |
608 | if (errno != ENOENT) | |
609 | return -errno; | |
5fc7f358 | 610 | |
a5ecdf7c LP |
611 | continue; /* Vanished while we were looking at it */ |
612 | } | |
613 | ||
614 | if (endswith(fname, ".raw")) { | |
615 | if (!S_ISREG(st.st_mode)) { | |
616 | log_debug("Ignoring non-regular file '%s' with .raw suffix.", fname); | |
3a6ce860 | 617 | continue; |
a5ecdf7c | 618 | } |
3a6ce860 | 619 | |
a5ecdf7c | 620 | } else if (endswith(fname, ".v")) { |
3a6ce860 | 621 | |
a5ecdf7c LP |
622 | if (!S_ISDIR(st.st_mode)) { |
623 | log_debug("Ignoring non-directory file '%s' with .v suffix.", fname); | |
624 | continue; | |
625 | } | |
626 | ||
627 | _cleanup_free_ char *suffix = NULL; | |
628 | suffix = strdup(ASSERT_PTR(startswith(fname, name))); | |
629 | if (!suffix) | |
630 | return -ENOMEM; | |
631 | ||
632 | *ASSERT_PTR(endswith(suffix, ".v")) = 0; | |
633 | ||
634 | _cleanup_free_ char *vp = path_join(resolved, fname); | |
635 | if (!vp) | |
636 | return -ENOMEM; | |
637 | ||
638 | PickFilter filter = { | |
639 | .type_mask = endswith(suffix, ".raw") ? (UINT32_C(1) << DT_REG) | (UINT32_C(1) << DT_BLK) : (UINT32_C(1) << DT_DIR), | |
640 | .basename = name, | |
641 | .architecture = _ARCHITECTURE_INVALID, | |
421a4ba7 | 642 | .suffix = STRV_MAKE(suffix), |
a5ecdf7c LP |
643 | }; |
644 | ||
645 | _cleanup_(pick_result_done) PickResult result = PICK_RESULT_NULL; | |
646 | r = path_pick(root, | |
647 | /* toplevel_fd= */ AT_FDCWD, | |
648 | vp, | |
649 | &filter, | |
650 | PICK_ARCHITECTURE|PICK_TRIES, | |
651 | &result); | |
652 | if (r < 0) { | |
653 | log_debug_errno(r, "Failed to pick versioned image on '%s', skipping: %m", vp); | |
654 | continue; | |
655 | } | |
656 | if (!result.path) { | |
657 | log_debug("Found versioned directory '%s', without matching entry, skipping: %m", vp); | |
658 | continue; | |
659 | } | |
660 | ||
661 | /* Refresh the stat data for the discovered target */ | |
662 | st = result.st; | |
663 | ||
664 | _cleanup_free_ char *bn = NULL; | |
665 | r = path_extract_filename(result.path, &bn); | |
666 | if (r < 0) { | |
667 | log_debug_errno(r, "Failed to extract basename of image path '%s', skipping: %m", result.path); | |
668 | continue; | |
669 | } | |
670 | ||
671 | fname_buf = path_join(fname, bn); | |
672 | if (!fname_buf) | |
673 | return log_oom(); | |
3a6ce860 | 674 | |
a5ecdf7c | 675 | fname = fname_buf; |
3a6ce860 | 676 | |
a5ecdf7c LP |
677 | } else if (!S_ISDIR(st.st_mode) && !S_ISBLK(st.st_mode)) { |
678 | log_debug("Ignoring non-directory and non-block device file '%s' without suffix.", fname); | |
3a6ce860 | 679 | continue; |
a5ecdf7c | 680 | } |
3a6ce860 | 681 | |
a5ecdf7c LP |
682 | r = image_make(class, name, dirfd(d), resolved, fname, &st, ret); |
683 | if (IN_SET(r, -ENOENT, -EMEDIUMTYPE)) | |
684 | continue; | |
685 | if (r < 0) | |
686 | return r; | |
cd61c3bf | 687 | |
a5ecdf7c LP |
688 | if (ret) |
689 | (*ret)->discoverable = true; | |
cf604fd4 | 690 | |
a5ecdf7c LP |
691 | return 1; |
692 | } | |
c2ce6a3d LP |
693 | } |
694 | ||
cf604fd4 | 695 | if (class == IMAGE_MACHINE && streq(name, ".host")) { |
3775e141 | 696 | r = image_make(class, ".host", AT_FDCWD, NULL, empty_to_root(root), NULL, ret); |
cf604fd4 LP |
697 | if (r < 0) |
698 | return r; | |
699 | ||
700 | if (ret) | |
701 | (*ret)->discoverable = true; | |
702 | ||
a5ecdf7c | 703 | return 1; |
cf604fd4 | 704 | } |
5fc7f358 | 705 | |
3a6ce860 | 706 | return -ENOENT; |
c2ce6a3d LP |
707 | }; |
708 | ||
2ddf182b | 709 | int image_from_path(const char *path, Image **ret) { |
cf604fd4 LP |
710 | |
711 | /* Note that we don't set the 'discoverable' field of the returned object, because we don't check here whether | |
712 | * the image is in the image search path. And if it is we don't know if the path we used is actually not | |
3fe91079 | 713 | * overridden by another, different image earlier in the search path */ |
cf604fd4 | 714 | |
2ddf182b | 715 | if (path_equal(path, "/")) |
3775e141 | 716 | return image_make(IMAGE_MACHINE, ".host", AT_FDCWD, NULL, "/", NULL, ret); |
2ddf182b | 717 | |
3775e141 | 718 | return image_make(_IMAGE_CLASS_INVALID, NULL, AT_FDCWD, NULL, path, NULL, ret); |
2ddf182b LP |
719 | } |
720 | ||
d577d4a4 | 721 | int image_find_harder(ImageClass class, const char *name_or_path, const char *root, Image **ret) { |
2ddf182b | 722 | if (image_name_is_valid(name_or_path)) |
d577d4a4 | 723 | return image_find(class, name_or_path, root, ret); |
2ddf182b LP |
724 | |
725 | return image_from_path(name_or_path, ret); | |
726 | } | |
727 | ||
d577d4a4 LP |
728 | int image_discover( |
729 | ImageClass class, | |
730 | const char *root, | |
731 | Hashmap *h) { | |
732 | ||
c2ce6a3d LP |
733 | int r; |
734 | ||
5ef46e5f LP |
735 | assert(class >= 0); |
736 | assert(class < _IMAGE_CLASS_MAX); | |
c2ce6a3d LP |
737 | assert(h); |
738 | ||
73740c9f | 739 | NULSTR_FOREACH(path, pick_image_search_path(class)) { |
d577d4a4 | 740 | _cleanup_free_ char *resolved = NULL; |
c2ce6a3d | 741 | _cleanup_closedir_ DIR *d = NULL; |
c2ce6a3d | 742 | |
f461a28d | 743 | r = chase_and_opendir(path, root, CHASE_PREFIX_ROOT, &resolved, &d); |
d577d4a4 LP |
744 | if (r == -ENOENT) |
745 | continue; | |
746 | if (r < 0) | |
747 | return r; | |
c2ce6a3d LP |
748 | |
749 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
a5ecdf7c | 750 | _cleanup_free_ char *pretty = NULL, *fname_buf = NULL; |
c2ce6a3d | 751 | _cleanup_(image_unrefp) Image *image = NULL; |
a5ecdf7c | 752 | const char *fname = de->d_name; |
3a6ce860 | 753 | struct stat st; |
d577d4a4 | 754 | int flags; |
c2ce6a3d | 755 | |
a5ecdf7c | 756 | if (dot_or_dot_dot(fname)) |
c2ce6a3d LP |
757 | continue; |
758 | ||
d577d4a4 LP |
759 | /* As mentioned above, we follow symlinks on this fstatat(), because we want to |
760 | * permit people to symlink block devices into the search path. */ | |
761 | flags = root ? AT_SYMLINK_NOFOLLOW : 0; | |
a5ecdf7c | 762 | if (fstatat(dirfd(d), fname, &st, flags) < 0) { |
3a6ce860 LP |
763 | if (errno == ENOENT) |
764 | continue; | |
765 | ||
766 | return -errno; | |
767 | } | |
768 | ||
a5ecdf7c LP |
769 | if (S_ISREG(st.st_mode)) { |
770 | r = extract_image_basename( | |
771 | fname, | |
772 | image_class_suffix_to_string(class), | |
773 | STRV_MAKE(".raw"), | |
774 | &pretty, | |
775 | /* suffix= */ NULL); | |
776 | if (r < 0) { | |
777 | log_debug_errno(r, "Skipping directory entry '%s', which doesn't look like an image.", fname); | |
778 | continue; | |
779 | } | |
780 | } else if (S_ISDIR(st.st_mode)) { | |
781 | const char *v; | |
782 | ||
783 | v = endswith(fname, ".v"); | |
784 | if (v) { | |
785 | _cleanup_free_ char *suffix = NULL, *nov = NULL; | |
786 | ||
787 | nov = strndup(fname, v - fname); /* Chop off the .v */ | |
788 | if (!nov) | |
789 | return -ENOMEM; | |
790 | ||
791 | r = extract_image_basename( | |
792 | nov, | |
793 | image_class_suffix_to_string(class), | |
794 | STRV_MAKE(".raw", ""), | |
795 | &pretty, | |
796 | &suffix); | |
797 | if (r < 0) { | |
798 | log_debug_errno(r, "Skipping directory entry '%s', which doesn't look like a versioned image.", fname); | |
799 | continue; | |
800 | } | |
801 | ||
802 | _cleanup_free_ char *vp = path_join(resolved, fname); | |
803 | if (!vp) | |
804 | return -ENOMEM; | |
805 | ||
806 | PickFilter filter = { | |
807 | .type_mask = endswith(suffix, ".raw") ? (UINT32_C(1) << DT_REG) | (UINT32_C(1) << DT_BLK) : (UINT32_C(1) << DT_DIR), | |
808 | .basename = pretty, | |
809 | .architecture = _ARCHITECTURE_INVALID, | |
421a4ba7 | 810 | .suffix = STRV_MAKE(suffix), |
a5ecdf7c LP |
811 | }; |
812 | ||
813 | _cleanup_(pick_result_done) PickResult result = PICK_RESULT_NULL; | |
814 | r = path_pick(root, | |
815 | /* toplevel_fd= */ AT_FDCWD, | |
816 | vp, | |
817 | &filter, | |
818 | PICK_ARCHITECTURE|PICK_TRIES, | |
819 | &result); | |
820 | if (r < 0) { | |
821 | log_debug_errno(r, "Failed to pick versioned image on '%s', skipping: %m", vp); | |
822 | continue; | |
823 | } | |
824 | if (!result.path) { | |
825 | log_debug("Found versioned directory '%s', without matching entry, skipping: %m", vp); | |
826 | continue; | |
827 | } | |
828 | ||
829 | /* Refresh the stat data for the discovered target */ | |
830 | st = result.st; | |
831 | ||
832 | _cleanup_free_ char *bn = NULL; | |
833 | r = path_extract_filename(result.path, &bn); | |
834 | if (r < 0) { | |
835 | log_debug_errno(r, "Failed to extract basename of image path '%s', skipping: %m", result.path); | |
836 | continue; | |
837 | } | |
838 | ||
839 | fname_buf = path_join(fname, bn); | |
840 | if (!fname_buf) | |
841 | return log_oom(); | |
842 | ||
843 | fname = fname_buf; | |
844 | } else { | |
845 | r = extract_image_basename( | |
846 | fname, | |
847 | image_class_suffix_to_string(class), | |
848 | /* format_suffix= */ NULL, | |
849 | &pretty, | |
850 | /* ret_suffix= */ NULL); | |
851 | if (r < 0) { | |
852 | log_debug_errno(r, "Skipping directory entry '%s', which doesn't look like an image.", fname); | |
853 | continue; | |
854 | } | |
855 | } | |
856 | ||
857 | } else if (S_ISBLK(st.st_mode)) { | |
858 | r = extract_image_basename( | |
859 | fname, | |
860 | /* class_suffix= */ NULL, | |
861 | /* format_suffix= */ NULL, | |
862 | &pretty, | |
863 | /* ret_v_suffix= */ NULL); | |
864 | if (r < 0) { | |
865 | log_debug_errno(r, "Skipping directory entry '%s', which doesn't look like an image.", fname); | |
866 | continue; | |
867 | } | |
868 | } else { | |
869 | log_debug("Skipping directory entry '%s', which is neither regular file, directory nor block device.", fname); | |
1bf36bf9 | 870 | continue; |
e7df707b | 871 | } |
1bf36bf9 LP |
872 | |
873 | if (hashmap_contains(h, pretty)) | |
c2ce6a3d LP |
874 | continue; |
875 | ||
a5ecdf7c | 876 | r = image_make(class, pretty, dirfd(d), resolved, fname, &st, &image); |
3a6ce860 | 877 | if (IN_SET(r, -ENOENT, -EMEDIUMTYPE)) |
c2ce6a3d LP |
878 | continue; |
879 | if (r < 0) | |
880 | return r; | |
881 | ||
cf604fd4 LP |
882 | image->discoverable = true; |
883 | ||
c2ce6a3d LP |
884 | r = hashmap_put(h, image->name, image); |
885 | if (r < 0) | |
886 | return r; | |
887 | ||
5df1a553 | 888 | TAKE_PTR(image); |
cd61c3bf LP |
889 | } |
890 | } | |
891 | ||
5ef46e5f | 892 | if (class == IMAGE_MACHINE && !hashmap_contains(h, ".host")) { |
5fc7f358 LP |
893 | _cleanup_(image_unrefp) Image *image = NULL; |
894 | ||
3775e141 | 895 | r = image_make(IMAGE_MACHINE, ".host", AT_FDCWD, NULL, empty_to_root("/"), NULL, &image); |
5fc7f358 LP |
896 | if (r < 0) |
897 | return r; | |
898 | ||
cf604fd4 LP |
899 | image->discoverable = true; |
900 | ||
5fc7f358 LP |
901 | r = hashmap_put(h, image->name, image); |
902 | if (r < 0) | |
903 | return r; | |
904 | ||
905 | image = NULL; | |
5fc7f358 LP |
906 | } |
907 | ||
cd61c3bf LP |
908 | return 0; |
909 | } | |
910 | ||
08682124 | 911 | int image_remove(Image *i) { |
8e766630 | 912 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
8e0b6570 | 913 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 914 | _cleanup_free_ char *roothash = NULL; |
30535c16 LP |
915 | int r; |
916 | ||
08682124 LP |
917 | assert(i); |
918 | ||
d94c2b06 | 919 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
08682124 LP |
920 | return -EROFS; |
921 | ||
8e0b6570 LP |
922 | settings = image_settings_path(i); |
923 | if (!settings) | |
924 | return -ENOMEM; | |
925 | ||
162f6477 LP |
926 | r = image_roothash_path(i, &roothash); |
927 | if (r < 0) | |
928 | return r; | |
bafbac4e | 929 | |
30535c16 LP |
930 | /* Make sure we don't interfere with a running nspawn */ |
931 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
932 | if (r < 0) | |
933 | return r; | |
934 | ||
ebd93cb6 LP |
935 | switch (i->type) { |
936 | ||
937 | case IMAGE_SUBVOLUME: | |
9fb0b9c7 LP |
938 | |
939 | /* Let's unlink first, maybe it is a symlink? If that works we are happy. Otherwise, let's get out the | |
940 | * big guns */ | |
941 | if (unlink(i->path) < 0) { | |
942 | r = btrfs_subvol_remove(i->path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); | |
943 | if (r < 0) | |
944 | return r; | |
945 | } | |
946 | ||
8e0b6570 | 947 | break; |
ebd93cb6 LP |
948 | |
949 | case IMAGE_DIRECTORY: | |
01b72568 | 950 | /* Allow deletion of read-only directories */ |
db9a4254 | 951 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL, NULL); |
8e0b6570 LP |
952 | r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
953 | if (r < 0) | |
954 | return r; | |
955 | ||
956 | break; | |
01b72568 | 957 | |
eb38edce LP |
958 | case IMAGE_BLOCK: |
959 | ||
960 | /* If this is inside of /dev, then it's a real block device, hence let's not touch the device node | |
961 | * itself (but let's remove the stuff stored alongside it). If it's anywhere else, let's try to unlink | |
962 | * the thing (it's most likely a symlink after all). */ | |
963 | ||
964 | if (path_startswith(i->path, "/dev")) | |
965 | break; | |
966 | ||
4831981d | 967 | _fallthrough_; |
aceac2f0 | 968 | case IMAGE_RAW: |
41d1ed05 LP |
969 | if (unlink(i->path) < 0) |
970 | return -errno; | |
8e0b6570 | 971 | break; |
ebd93cb6 LP |
972 | |
973 | default: | |
15411c0c | 974 | return -EOPNOTSUPP; |
ebd93cb6 | 975 | } |
8e0b6570 | 976 | |
de010b0b | 977 | STRV_FOREACH(j, settings) |
8e0b6570 LP |
978 | if (unlink(*j) < 0 && errno != ENOENT) |
979 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", *j); | |
8e0b6570 | 980 | |
bafbac4e LP |
981 | if (unlink(roothash) < 0 && errno != ENOENT) |
982 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", roothash); | |
983 | ||
8e0b6570 LP |
984 | return 0; |
985 | } | |
986 | ||
bafbac4e | 987 | static int rename_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
162f6477 LP |
988 | _cleanup_free_ char *fn = NULL, *rs = NULL; |
989 | int r; | |
8e0b6570 | 990 | |
162f6477 LP |
991 | fn = strjoin(new_name, suffix); |
992 | if (!fn) | |
8e0b6570 LP |
993 | return -ENOMEM; |
994 | ||
162f6477 LP |
995 | r = file_in_same_dir(path, fn, &rs); |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
8e0b6570 | 999 | return rename_noreplace(AT_FDCWD, path, AT_FDCWD, rs); |
ebd93cb6 LP |
1000 | } |
1001 | ||
1002 | int image_rename(Image *i, const char *new_name) { | |
8e766630 | 1003 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT, name_lock = LOCK_FILE_INIT; |
bafbac4e | 1004 | _cleanup_free_ char *new_path = NULL, *nn = NULL, *roothash = NULL; |
8e0b6570 | 1005 | _cleanup_strv_free_ char **settings = NULL; |
01b72568 | 1006 | unsigned file_attr = 0; |
ebd93cb6 LP |
1007 | int r; |
1008 | ||
1009 | assert(i); | |
1010 | ||
1011 | if (!image_name_is_valid(new_name)) | |
1012 | return -EINVAL; | |
1013 | ||
d94c2b06 | 1014 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
1015 | return -EROFS; |
1016 | ||
8e0b6570 LP |
1017 | settings = image_settings_path(i); |
1018 | if (!settings) | |
1019 | return -ENOMEM; | |
1020 | ||
162f6477 LP |
1021 | r = image_roothash_path(i, &roothash); |
1022 | if (r < 0) | |
1023 | return r; | |
bafbac4e | 1024 | |
30535c16 LP |
1025 | /* Make sure we don't interfere with a running nspawn */ |
1026 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
1027 | if (r < 0) | |
1028 | return r; | |
1029 | ||
1030 | /* Make sure nobody takes the new name, between the time we | |
1031 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 1032 | * time we take possession of it */ |
30535c16 LP |
1033 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
1034 | if (r < 0) | |
1035 | return r; | |
1036 | ||
d577d4a4 | 1037 | r = image_find(IMAGE_MACHINE, new_name, NULL, NULL); |
3a6ce860 | 1038 | if (r >= 0) |
ebd93cb6 | 1039 | return -EEXIST; |
3a6ce860 LP |
1040 | if (r != -ENOENT) |
1041 | return r; | |
ebd93cb6 LP |
1042 | |
1043 | switch (i->type) { | |
1044 | ||
ebd93cb6 | 1045 | case IMAGE_DIRECTORY: |
01b72568 LP |
1046 | /* Turn of the immutable bit while we rename the image, so that we can rename it */ |
1047 | (void) read_attr_path(i->path, &file_attr); | |
1048 | ||
1049 | if (file_attr & FS_IMMUTABLE_FL) | |
db9a4254 | 1050 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL, NULL); |
01b72568 | 1051 | |
4831981d | 1052 | _fallthrough_; |
01b72568 | 1053 | case IMAGE_SUBVOLUME: |
162f6477 | 1054 | r = file_in_same_dir(i->path, new_name, &new_path); |
ebd93cb6 LP |
1055 | break; |
1056 | ||
eb38edce LP |
1057 | case IMAGE_BLOCK: |
1058 | ||
1059 | /* Refuse renaming raw block devices in /dev, the names are picked by udev after all. */ | |
1060 | if (path_startswith(i->path, "/dev")) | |
1061 | return -EROFS; | |
1062 | ||
162f6477 | 1063 | r = file_in_same_dir(i->path, new_name, &new_path); |
eb38edce LP |
1064 | break; |
1065 | ||
aceac2f0 | 1066 | case IMAGE_RAW: { |
ebd93cb6 LP |
1067 | const char *fn; |
1068 | ||
63c372cb | 1069 | fn = strjoina(new_name, ".raw"); |
162f6477 LP |
1070 | |
1071 | r = file_in_same_dir(i->path, fn, &new_path); | |
ebd93cb6 LP |
1072 | break; |
1073 | } | |
1074 | ||
1075 | default: | |
15411c0c | 1076 | return -EOPNOTSUPP; |
ebd93cb6 | 1077 | } |
162f6477 LP |
1078 | if (r < 0) |
1079 | return r; | |
ebd93cb6 LP |
1080 | |
1081 | nn = strdup(new_name); | |
1082 | if (!nn) | |
1083 | return -ENOMEM; | |
1084 | ||
f85ef957 AC |
1085 | r = rename_noreplace(AT_FDCWD, i->path, AT_FDCWD, new_path); |
1086 | if (r < 0) | |
1087 | return r; | |
ebd93cb6 | 1088 | |
01b72568 LP |
1089 | /* Restore the immutable bit, if it was set before */ |
1090 | if (file_attr & FS_IMMUTABLE_FL) | |
db9a4254 | 1091 | (void) chattr_path(new_path, FS_IMMUTABLE_FL, FS_IMMUTABLE_FL, NULL); |
01b72568 | 1092 | |
f9ecfd3b DL |
1093 | free_and_replace(i->path, new_path); |
1094 | free_and_replace(i->name, nn); | |
ebd93cb6 | 1095 | |
8e0b6570 | 1096 | STRV_FOREACH(j, settings) { |
bafbac4e | 1097 | r = rename_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
1098 | if (r < 0 && r != -ENOENT) |
1099 | log_debug_errno(r, "Failed to rename settings file %s, ignoring: %m", *j); | |
1100 | } | |
1101 | ||
bafbac4e LP |
1102 | r = rename_auxiliary_file(roothash, new_name, ".roothash"); |
1103 | if (r < 0 && r != -ENOENT) | |
1104 | log_debug_errno(r, "Failed to rename roothash file %s, ignoring: %m", roothash); | |
1105 | ||
ebd93cb6 LP |
1106 | return 0; |
1107 | } | |
1108 | ||
bafbac4e | 1109 | static int clone_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
162f6477 LP |
1110 | _cleanup_free_ char *fn = NULL, *rs = NULL; |
1111 | int r; | |
8e0b6570 | 1112 | |
162f6477 LP |
1113 | fn = strjoin(new_name, suffix); |
1114 | if (!fn) | |
8e0b6570 LP |
1115 | return -ENOMEM; |
1116 | ||
162f6477 LP |
1117 | r = file_in_same_dir(path, fn, &rs); |
1118 | if (r < 0) | |
1119 | return r; | |
1120 | ||
7c2f5495 | 1121 | return copy_file_atomic(path, rs, 0664, COPY_REFLINK); |
8e0b6570 LP |
1122 | } |
1123 | ||
ebd93cb6 | 1124 | int image_clone(Image *i, const char *new_name, bool read_only) { |
8e766630 | 1125 | _cleanup_(release_lock_file) LockFile name_lock = LOCK_FILE_INIT; |
8e0b6570 | 1126 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 1127 | _cleanup_free_ char *roothash = NULL; |
ebd93cb6 LP |
1128 | const char *new_path; |
1129 | int r; | |
1130 | ||
1131 | assert(i); | |
1132 | ||
1133 | if (!image_name_is_valid(new_name)) | |
1134 | return -EINVAL; | |
1135 | ||
8e0b6570 LP |
1136 | settings = image_settings_path(i); |
1137 | if (!settings) | |
1138 | return -ENOMEM; | |
1139 | ||
162f6477 LP |
1140 | r = image_roothash_path(i, &roothash); |
1141 | if (r < 0) | |
1142 | return r; | |
bafbac4e | 1143 | |
30535c16 LP |
1144 | /* Make sure nobody takes the new name, between the time we |
1145 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 1146 | * time we take possession of it */ |
30535c16 LP |
1147 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
1148 | if (r < 0) | |
1149 | return r; | |
1150 | ||
d577d4a4 | 1151 | r = image_find(IMAGE_MACHINE, new_name, NULL, NULL); |
3a6ce860 | 1152 | if (r >= 0) |
ebd93cb6 | 1153 | return -EEXIST; |
3a6ce860 LP |
1154 | if (r != -ENOENT) |
1155 | return r; | |
ebd93cb6 LP |
1156 | |
1157 | switch (i->type) { | |
1158 | ||
1159 | case IMAGE_SUBVOLUME: | |
1160 | case IMAGE_DIRECTORY: | |
9a50e3ca | 1161 | /* If we can we'll always try to create a new btrfs subvolume here, even if the source is a plain |
13e785f7 | 1162 | * directory. */ |
9a50e3ca | 1163 | |
63c372cb | 1164 | new_path = strjoina("/var/lib/machines/", new_name); |
ebd93cb6 | 1165 | |
fab4ef72 DDM |
1166 | r = btrfs_subvol_snapshot_at(AT_FDCWD, i->path, AT_FDCWD, new_path, |
1167 | (read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | | |
1168 | BTRFS_SNAPSHOT_FALLBACK_COPY | | |
1169 | BTRFS_SNAPSHOT_FALLBACK_DIRECTORY | | |
1170 | BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE | | |
1171 | BTRFS_SNAPSHOT_RECURSIVE | | |
1172 | BTRFS_SNAPSHOT_QUOTA); | |
17cbb288 | 1173 | if (r >= 0) |
9a50e3ca | 1174 | /* Enable "subtree" quotas for the copy, if we didn't copy any quota from the source. */ |
8120ee28 | 1175 | (void) btrfs_subvol_auto_qgroup(new_path, 0, true); |
5bcd08db | 1176 | |
ebd93cb6 LP |
1177 | break; |
1178 | ||
aceac2f0 | 1179 | case IMAGE_RAW: |
63c372cb | 1180 | new_path = strjoina("/var/lib/machines/", new_name, ".raw"); |
ebd93cb6 | 1181 | |
7c2f5495 DDM |
1182 | r = copy_file_atomic_full(i->path, new_path, read_only ? 0444 : 0644, FS_NOCOW_FL, FS_NOCOW_FL, |
1183 | COPY_REFLINK|COPY_CRTIME, NULL, NULL); | |
ebd93cb6 LP |
1184 | break; |
1185 | ||
eb38edce | 1186 | case IMAGE_BLOCK: |
ebd93cb6 | 1187 | default: |
15411c0c | 1188 | return -EOPNOTSUPP; |
ebd93cb6 LP |
1189 | } |
1190 | ||
1191 | if (r < 0) | |
1192 | return r; | |
1193 | ||
8e0b6570 | 1194 | STRV_FOREACH(j, settings) { |
bafbac4e | 1195 | r = clone_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
1196 | if (r < 0 && r != -ENOENT) |
1197 | log_debug_errno(r, "Failed to clone settings %s, ignoring: %m", *j); | |
1198 | } | |
1199 | ||
bafbac4e LP |
1200 | r = clone_auxiliary_file(roothash, new_name, ".roothash"); |
1201 | if (r < 0 && r != -ENOENT) | |
1202 | log_debug_errno(r, "Failed to clone root hash file %s, ignoring: %m", roothash); | |
1203 | ||
ebd93cb6 LP |
1204 | return 0; |
1205 | } | |
1206 | ||
1207 | int image_read_only(Image *i, bool b) { | |
8e766630 | 1208 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
ebd93cb6 | 1209 | int r; |
c7664c07 | 1210 | |
ebd93cb6 LP |
1211 | assert(i); |
1212 | ||
d94c2b06 | 1213 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
1214 | return -EROFS; |
1215 | ||
30535c16 LP |
1216 | /* Make sure we don't interfere with a running nspawn */ |
1217 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
1218 | if (r < 0) | |
1219 | return r; | |
1220 | ||
ebd93cb6 LP |
1221 | switch (i->type) { |
1222 | ||
1223 | case IMAGE_SUBVOLUME: | |
5bcd08db LP |
1224 | |
1225 | /* Note that we set the flag only on the top-level | |
1226 | * subvolume of the image. */ | |
1227 | ||
ebd93cb6 LP |
1228 | r = btrfs_subvol_set_read_only(i->path, b); |
1229 | if (r < 0) | |
1230 | return r; | |
01b72568 LP |
1231 | |
1232 | break; | |
1233 | ||
1234 | case IMAGE_DIRECTORY: | |
1235 | /* For simple directory trees we cannot use the access | |
1236 | mode of the top-level directory, since it has an | |
1237 | effect on the container itself. However, we can | |
1238 | use the "immutable" flag, to at least make the | |
1239 | top-level directory read-only. It's not as good as | |
1240 | a read-only subvolume, but at least something, and | |
13e785f7 | 1241 | we can read the value back. */ |
01b72568 | 1242 | |
db9a4254 | 1243 | r = chattr_path(i->path, b ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL, NULL); |
01b72568 LP |
1244 | if (r < 0) |
1245 | return r; | |
1246 | ||
ebd93cb6 LP |
1247 | break; |
1248 | ||
aceac2f0 | 1249 | case IMAGE_RAW: { |
ebd93cb6 LP |
1250 | struct stat st; |
1251 | ||
1252 | if (stat(i->path, &st) < 0) | |
1253 | return -errno; | |
1254 | ||
1255 | if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0) | |
1256 | return -errno; | |
f2068bcc LP |
1257 | |
1258 | /* If the images is now read-only, it's a good time to | |
1259 | * defrag it, given that no write patterns will | |
1260 | * fragment it again. */ | |
1261 | if (b) | |
1262 | (void) btrfs_defrag(i->path); | |
ebd93cb6 LP |
1263 | break; |
1264 | } | |
1265 | ||
eb38edce | 1266 | case IMAGE_BLOCK: { |
254d1313 | 1267 | _cleanup_close_ int fd = -EBADF; |
eb38edce LP |
1268 | struct stat st; |
1269 | int state = b; | |
1270 | ||
1271 | fd = open(i->path, O_CLOEXEC|O_RDONLY|O_NONBLOCK|O_NOCTTY); | |
1272 | if (fd < 0) | |
1273 | return -errno; | |
1274 | ||
1275 | if (fstat(fd, &st) < 0) | |
1276 | return -errno; | |
1277 | if (!S_ISBLK(st.st_mode)) | |
1278 | return -ENOTTY; | |
1279 | ||
1280 | if (ioctl(fd, BLKROSET, &state) < 0) | |
1281 | return -errno; | |
1282 | ||
1283 | break; | |
1284 | } | |
1285 | ||
ebd93cb6 | 1286 | default: |
15411c0c | 1287 | return -EOPNOTSUPP; |
ebd93cb6 LP |
1288 | } |
1289 | ||
1290 | return 0; | |
08682124 LP |
1291 | } |
1292 | ||
8759bc95 LP |
1293 | static void make_lock_dir(void) { |
1294 | (void) mkdir_p("/run/systemd/nspawn", 0755); | |
1295 | (void) mkdir("/run/systemd/nspawn/locks", 0700); | |
1296 | } | |
1297 | ||
cb1b813f LP |
1298 | int image_path_lock( |
1299 | const char *path, | |
1300 | int operation, | |
1301 | LockFile *ret_global, | |
1302 | LockFile *ret_local) { | |
1303 | ||
30535c16 LP |
1304 | _cleanup_free_ char *p = NULL; |
1305 | LockFile t = LOCK_FILE_INIT; | |
1306 | struct stat st; | |
f25bed67 | 1307 | bool exclusive; |
30535c16 LP |
1308 | int r; |
1309 | ||
1310 | assert(path); | |
cb1b813f | 1311 | assert(ret_local); |
30535c16 | 1312 | |
f25bed67 LP |
1313 | /* Locks an image path. This actually creates two locks: one "local" one, next to the image path |
1314 | * itself, which might be shared via NFS. And another "global" one, in /run, that uses the | |
1315 | * device/inode number. This has the benefit that we can even lock a tree that is a mount point, | |
1316 | * correctly. */ | |
30535c16 | 1317 | |
30535c16 LP |
1318 | if (!path_is_absolute(path)) |
1319 | return -EINVAL; | |
1320 | ||
f25bed67 LP |
1321 | switch (operation & (LOCK_SH|LOCK_EX)) { |
1322 | case LOCK_SH: | |
1323 | exclusive = false; | |
1324 | break; | |
1325 | case LOCK_EX: | |
1326 | exclusive = true; | |
1327 | break; | |
1328 | default: | |
1329 | return -EINVAL; | |
1330 | } | |
1331 | ||
b6e953f2 | 1332 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
cb1b813f LP |
1333 | *ret_local = LOCK_FILE_INIT; |
1334 | if (ret_global) | |
1335 | *ret_global = LOCK_FILE_INIT; | |
b6e953f2 LP |
1336 | return 0; |
1337 | } | |
1338 | ||
f25bed67 LP |
1339 | /* Prohibit taking exclusive locks on the host image. We can't allow this, since we ourselves are |
1340 | * running off it after all, and we don't want any images to manipulate the host image. We make an | |
1341 | * exception for shared locks however: we allow those (and make them NOPs since there's no point in | |
1342 | * taking them if there can't be exclusive locks). Strictly speaking these are questionable as well, | |
1343 | * since it means changes made to the host might propagate to the container as they happen (and a | |
1344 | * shared lock kinda suggests that no changes happen at all while it is in place), but it's too | |
1345 | * useful not to allow read-only containers off the host root, hence let's support this, and trust | |
1346 | * the user to do the right thing with this. */ | |
1347 | if (path_equal(path, "/")) { | |
1348 | if (exclusive) | |
1349 | return -EBUSY; | |
1350 | ||
cb1b813f LP |
1351 | *ret_local = LOCK_FILE_INIT; |
1352 | if (ret_global) | |
1353 | *ret_global = LOCK_FILE_INIT; | |
f25bed67 LP |
1354 | return 0; |
1355 | } | |
b6e953f2 | 1356 | |
cb1b813f LP |
1357 | if (ret_global) { |
1358 | if (stat(path, &st) >= 0) { | |
1359 | if (S_ISBLK(st.st_mode)) | |
1360 | r = asprintf(&p, "/run/systemd/nspawn/locks/block-%u:%u", major(st.st_rdev), minor(st.st_rdev)); | |
1361 | else if (S_ISDIR(st.st_mode) || S_ISREG(st.st_mode)) | |
1362 | r = asprintf(&p, "/run/systemd/nspawn/locks/inode-%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino); | |
1363 | else | |
1364 | return -ENOTTY; | |
1365 | if (r < 0) | |
1366 | return -ENOMEM; | |
1367 | } | |
30535c16 LP |
1368 | } |
1369 | ||
f25bed67 LP |
1370 | /* For block devices we don't need the "local" lock, as the major/minor lock above should be |
1371 | * sufficient, since block devices are host local anyway. */ | |
1372 | if (!path_startswith(path, "/dev/")) { | |
eb38edce | 1373 | r = make_lock_file_for(path, operation, &t); |
8be17c9b | 1374 | if (r < 0) { |
f25bed67 | 1375 | if (!exclusive && r == -EROFS) |
771b7ead | 1376 | log_debug_errno(r, "Failed to create shared lock for '%s', ignoring: %m", path); |
8be17c9b LT |
1377 | else |
1378 | return r; | |
1379 | } | |
eb38edce | 1380 | } |
30535c16 LP |
1381 | |
1382 | if (p) { | |
8759bc95 | 1383 | make_lock_dir(); |
30535c16 | 1384 | |
cb1b813f | 1385 | r = make_lock_file(p, operation, ret_global); |
30535c16 LP |
1386 | if (r < 0) { |
1387 | release_lock_file(&t); | |
1388 | return r; | |
1389 | } | |
cb1b813f LP |
1390 | } else if (ret_global) |
1391 | *ret_global = LOCK_FILE_INIT; | |
30535c16 | 1392 | |
cb1b813f | 1393 | *ret_local = t; |
30535c16 LP |
1394 | return 0; |
1395 | } | |
1396 | ||
cb81cd80 | 1397 | int image_set_limit(Image *i, uint64_t referenced_max) { |
d6ce17c7 LP |
1398 | assert(i); |
1399 | ||
d94c2b06 | 1400 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
d6ce17c7 LP |
1401 | return -EROFS; |
1402 | ||
1403 | if (i->type != IMAGE_SUBVOLUME) | |
15411c0c | 1404 | return -EOPNOTSUPP; |
d6ce17c7 | 1405 | |
5bcd08db LP |
1406 | /* We set the quota both for the subvolume as well as for the |
1407 | * subtree. The latter is mostly for historical reasons, since | |
1408 | * we didn't use to have a concept of subtree quota, and hence | |
1409 | * only modified the subvolume quota. */ | |
1410 | ||
1411 | (void) btrfs_qgroup_set_limit(i->path, 0, referenced_max); | |
1412 | (void) btrfs_subvol_auto_qgroup(i->path, 0, true); | |
1413 | return btrfs_subvol_set_subtree_quota_limit(i->path, 0, referenced_max); | |
d6ce17c7 LP |
1414 | } |
1415 | ||
84be0c71 | 1416 | int image_read_metadata(Image *i, const ImagePolicy *image_policy) { |
8e766630 | 1417 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
c7664c07 LP |
1418 | int r; |
1419 | ||
1420 | assert(i); | |
1421 | ||
1422 | r = image_path_lock(i->path, LOCK_SH|LOCK_NB, &global_lock, &local_lock); | |
1423 | if (r < 0) | |
1424 | return r; | |
1425 | ||
1426 | switch (i->type) { | |
1427 | ||
1428 | case IMAGE_SUBVOLUME: | |
1429 | case IMAGE_DIRECTORY: { | |
a81fe93e LP |
1430 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL, **sysext_release = NULL, **confext_release = NULL; |
1431 | _cleanup_free_ char *hostname = NULL, *path = NULL; | |
c7664c07 | 1432 | sd_id128_t machine_id = SD_ID128_NULL; |
c7664c07 | 1433 | |
b60e0f57 | 1434 | if (i->class == IMAGE_SYSEXT) { |
6afa5d86 LB |
1435 | r = extension_has_forbidden_content(i->path); |
1436 | if (r < 0) | |
1437 | return r; | |
1438 | if (r > 0) | |
1439 | return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM), | |
1440 | "Conflicting content found in image %s, refusing.", | |
1441 | i->name); | |
1442 | } | |
1443 | ||
f461a28d | 1444 | r = chase("/etc/hostname", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path, NULL); |
c7664c07 LP |
1445 | if (r < 0 && r != -ENOENT) |
1446 | log_debug_errno(r, "Failed to chase /etc/hostname in image %s: %m", i->name); | |
1447 | else if (r >= 0) { | |
1448 | r = read_etc_hostname(path, &hostname); | |
1449 | if (r < 0) | |
cc4482ee | 1450 | log_debug_errno(r, "Failed to read /etc/hostname of image %s: %m", i->name); |
c7664c07 LP |
1451 | } |
1452 | ||
1453 | path = mfree(path); | |
1454 | ||
f7b5f399 YW |
1455 | r = id128_get_machine(i->path, &machine_id); |
1456 | if (r < 0) | |
1457 | log_debug_errno(r, "Failed to read machine ID in image %s, ignoring: %m", i->name); | |
c7664c07 | 1458 | |
f461a28d | 1459 | r = chase("/etc/machine-info", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path, NULL); |
c7664c07 LP |
1460 | if (r < 0 && r != -ENOENT) |
1461 | log_debug_errno(r, "Failed to chase /etc/machine-info in image %s: %m", i->name); | |
1462 | else if (r >= 0) { | |
aa8fbc74 | 1463 | r = load_env_file_pairs(NULL, path, &machine_info); |
c7664c07 LP |
1464 | if (r < 0) |
1465 | log_debug_errno(r, "Failed to parse machine-info data of %s: %m", i->name); | |
1466 | } | |
1467 | ||
d58ad743 LP |
1468 | r = load_os_release_pairs(i->path, &os_release); |
1469 | if (r < 0) | |
1470 | log_debug_errno(r, "Failed to read os-release in image, ignoring: %m"); | |
c7664c07 | 1471 | |
a81fe93e | 1472 | r = load_extension_release_pairs(i->path, IMAGE_SYSEXT, i->name, /* relax_extension_release_check= */ false, &sysext_release); |
bcf94222 | 1473 | if (r < 0) |
a81fe93e LP |
1474 | log_debug_errno(r, "Failed to read sysext-release in image, ignoring: %m"); |
1475 | ||
1476 | r = load_extension_release_pairs(i->path, IMAGE_CONFEXT, i->name, /* relax_extension_release_check= */ false, &confext_release); | |
1477 | if (r < 0) | |
1478 | log_debug_errno(r, "Failed to read confext-release in image, ignoring: %m"); | |
bcf94222 | 1479 | |
c7664c07 LP |
1480 | free_and_replace(i->hostname, hostname); |
1481 | i->machine_id = machine_id; | |
1482 | strv_free_and_replace(i->machine_info, machine_info); | |
1483 | strv_free_and_replace(i->os_release, os_release); | |
a81fe93e LP |
1484 | strv_free_and_replace(i->sysext_release, sysext_release); |
1485 | strv_free_and_replace(i->confext_release, confext_release); | |
c7664c07 LP |
1486 | break; |
1487 | } | |
1488 | ||
1489 | case IMAGE_RAW: | |
1490 | case IMAGE_BLOCK: { | |
1491 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
1492 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
f4a63ce2 LP |
1493 | DissectImageFlags flags = |
1494 | DISSECT_IMAGE_GENERIC_ROOT | | |
1495 | DISSECT_IMAGE_REQUIRE_ROOT | | |
1496 | DISSECT_IMAGE_RELAX_VAR_CHECK | | |
1497 | DISSECT_IMAGE_READ_ONLY | | |
1498 | DISSECT_IMAGE_USR_NO_ROOT | | |
1499 | DISSECT_IMAGE_ADD_PARTITION_DEVICES | | |
1500 | DISSECT_IMAGE_PIN_PARTITION_DEVICES | | |
1501 | DISSECT_IMAGE_VALIDATE_OS | | |
1502 | DISSECT_IMAGE_VALIDATE_OS_EXT | | |
1503 | DISSECT_IMAGE_ALLOW_USERSPACE_VERITY; | |
1504 | ||
1505 | r = loop_device_make_by_path( | |
1506 | i->path, | |
1507 | O_RDONLY, | |
1508 | /* sector_size= */ UINT32_MAX, | |
1509 | LO_FLAGS_PARTSCAN, | |
1510 | LOCK_SH, | |
1511 | &d); | |
41bc4849 LP |
1512 | if (r < 0) |
1513 | return r; | |
1514 | ||
bad31660 YW |
1515 | r = dissect_loop_device( |
1516 | d, | |
84be0c71 LP |
1517 | /* verity= */ NULL, |
1518 | /* mount_options= */ NULL, | |
1519 | image_policy, | |
f4a63ce2 | 1520 | flags, |
75dc190d | 1521 | &m); |
c7664c07 LP |
1522 | if (r < 0) |
1523 | return r; | |
1524 | ||
44e3097d LP |
1525 | r = dissected_image_acquire_metadata( |
1526 | m, | |
1527 | /* userns_fd= */ -EBADF, | |
1528 | flags); | |
c7664c07 LP |
1529 | if (r < 0) |
1530 | return r; | |
1531 | ||
1532 | free_and_replace(i->hostname, m->hostname); | |
1533 | i->machine_id = m->machine_id; | |
1534 | strv_free_and_replace(i->machine_info, m->machine_info); | |
1535 | strv_free_and_replace(i->os_release, m->os_release); | |
a81fe93e LP |
1536 | strv_free_and_replace(i->sysext_release, m->sysext_release); |
1537 | strv_free_and_replace(i->confext_release, m->confext_release); | |
c7664c07 LP |
1538 | |
1539 | break; | |
1540 | } | |
1541 | ||
1542 | default: | |
1543 | return -EOPNOTSUPP; | |
1544 | } | |
1545 | ||
1546 | i->metadata_valid = true; | |
1547 | ||
1548 | return 0; | |
1549 | } | |
1550 | ||
30535c16 | 1551 | int image_name_lock(const char *name, int operation, LockFile *ret) { |
99d97afc LP |
1552 | const char *p; |
1553 | ||
30535c16 LP |
1554 | assert(name); |
1555 | assert(ret); | |
1556 | ||
1557 | /* Locks an image name, regardless of the precise path used. */ | |
1558 | ||
99d97afc LP |
1559 | if (streq(name, ".host")) |
1560 | return -EBUSY; | |
1561 | ||
30535c16 LP |
1562 | if (!image_name_is_valid(name)) |
1563 | return -EINVAL; | |
1564 | ||
b6e953f2 LP |
1565 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
1566 | *ret = (LockFile) LOCK_FILE_INIT; | |
1567 | return 0; | |
1568 | } | |
1569 | ||
8759bc95 | 1570 | make_lock_dir(); |
99d97afc LP |
1571 | |
1572 | p = strjoina("/run/systemd/nspawn/locks/name-", name); | |
30535c16 LP |
1573 | return make_lock_file(p, operation, ret); |
1574 | } | |
1575 | ||
d577d4a4 LP |
1576 | bool image_in_search_path( |
1577 | ImageClass class, | |
1578 | const char *root, | |
1579 | const char *image) { | |
1580 | ||
ace9ab19 LP |
1581 | assert(image); |
1582 | ||
73740c9f | 1583 | NULSTR_FOREACH(path, pick_image_search_path(class)) { |
d577d4a4 | 1584 | const char *p, *q; |
ace9ab19 LP |
1585 | size_t k; |
1586 | ||
d577d4a4 LP |
1587 | if (!empty_or_root(root)) { |
1588 | q = path_startswith(path, root); | |
1589 | if (!q) | |
1590 | continue; | |
1591 | } else | |
1592 | q = path; | |
1593 | ||
1594 | p = path_startswith(q, path); | |
ace9ab19 LP |
1595 | if (!p) |
1596 | continue; | |
1597 | ||
1598 | /* Make sure there's a filename following */ | |
1599 | k = strcspn(p, "/"); | |
1600 | if (k == 0) | |
1601 | continue; | |
1602 | ||
1603 | p += k; | |
1604 | ||
1605 | /* Accept trailing slashes */ | |
1606 | if (p[strspn(p, "/")] == 0) | |
1607 | return true; | |
ace9ab19 LP |
1608 | } |
1609 | ||
1610 | return false; | |
1611 | } | |
1612 | ||
f5151fb4 LP |
1613 | int image_to_json(const struct Image *img, JsonVariant **ret) { |
1614 | assert(img); | |
1615 | ||
1616 | return json_build(ret, | |
1617 | JSON_BUILD_OBJECT( | |
1618 | JSON_BUILD_PAIR_STRING("Type", image_type_to_string(img->type)), | |
1619 | JSON_BUILD_PAIR_STRING("Class", image_class_to_string(img->class)), | |
1620 | JSON_BUILD_PAIR_STRING("Name", img->name), | |
1621 | JSON_BUILD_PAIR_CONDITION(img->path, "Path", JSON_BUILD_STRING(img->path)), | |
1622 | JSON_BUILD_PAIR_BOOLEAN("ReadOnly", img->read_only), | |
1623 | JSON_BUILD_PAIR_CONDITION(img->crtime != 0, "CreationTimestamp", JSON_BUILD_UNSIGNED(img->crtime)), | |
1624 | JSON_BUILD_PAIR_CONDITION(img->mtime != 0, "ModificationTimestamp", JSON_BUILD_UNSIGNED(img->mtime)), | |
1625 | JSON_BUILD_PAIR_CONDITION(img->usage != UINT64_MAX, "Usage", JSON_BUILD_UNSIGNED(img->usage)), | |
1626 | JSON_BUILD_PAIR_CONDITION(img->usage_exclusive != UINT64_MAX, "UsageExclusive", JSON_BUILD_UNSIGNED(img->usage_exclusive)), | |
1627 | JSON_BUILD_PAIR_CONDITION(img->limit != UINT64_MAX, "Limit", JSON_BUILD_UNSIGNED(img->limit)), | |
1628 | JSON_BUILD_PAIR_CONDITION(img->limit_exclusive != UINT64_MAX, "LimitExclusive", JSON_BUILD_UNSIGNED(img->limit_exclusive)))); | |
1629 | } | |
1630 | ||
cd61c3bf LP |
1631 | static const char* const image_type_table[_IMAGE_TYPE_MAX] = { |
1632 | [IMAGE_DIRECTORY] = "directory", | |
1633 | [IMAGE_SUBVOLUME] = "subvolume", | |
25cdbd04 LP |
1634 | [IMAGE_RAW] = "raw", |
1635 | [IMAGE_BLOCK] = "block", | |
cd61c3bf LP |
1636 | }; |
1637 | ||
1638 | DEFINE_STRING_TABLE_LOOKUP(image_type, ImageType); |