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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" |
d58ad743 | 38 | #include "os-util.h" |
8e0b6570 | 39 | #include "path-util.h" |
c6878637 | 40 | #include "rm-rf.h" |
8b43440b | 41 | #include "string-table.h" |
07630cea | 42 | #include "string-util.h" |
8e0b6570 | 43 | #include "strv.h" |
a8fbdf54 | 44 | #include "time-util.h" |
8e0b6570 | 45 | #include "utf8.h" |
a8fbdf54 | 46 | #include "util.h" |
89a5a90c | 47 | #include "xattr-util.h" |
cd61c3bf | 48 | |
5ef46e5f LP |
49 | static const char* const image_search_path[_IMAGE_CLASS_MAX] = { |
50 | [IMAGE_MACHINE] = "/var/lib/machines\0" | |
51 | "/var/lib/container\0" /* legacy */ | |
52 | "/usr/local/lib/machines\0" | |
53 | "/usr/lib/machines\0", | |
54 | ||
55 | [IMAGE_PORTABLE] = "/var/lib/portables\0" | |
56 | "/usr/local/lib/portables\0" | |
57 | "/usr/lib/portables\0", | |
58 | }; | |
c2ce6a3d | 59 | |
cd61c3bf LP |
60 | Image *image_unref(Image *i) { |
61 | if (!i) | |
62 | return NULL; | |
63 | ||
64 | free(i->name); | |
65 | free(i->path); | |
c7664c07 LP |
66 | |
67 | free(i->hostname); | |
68 | strv_free(i->machine_info); | |
69 | strv_free(i->os_release); | |
70 | ||
6b430fdb | 71 | return mfree(i); |
cd61c3bf LP |
72 | } |
73 | ||
8e0b6570 LP |
74 | static char **image_settings_path(Image *image) { |
75 | _cleanup_strv_free_ char **l = NULL; | |
8e0b6570 LP |
76 | const char *fn, *s; |
77 | unsigned i = 0; | |
78 | ||
79 | assert(image); | |
80 | ||
81 | l = new0(char*, 4); | |
82 | if (!l) | |
83 | return NULL; | |
84 | ||
85 | fn = strjoina(image->name, ".nspawn"); | |
86 | ||
87 | FOREACH_STRING(s, "/etc/systemd/nspawn/", "/run/systemd/nspawn/") { | |
88 | l[i] = strappend(s, fn); | |
89 | if (!l[i]) | |
90 | return NULL; | |
91 | ||
92 | i++; | |
93 | } | |
94 | ||
95 | l[i] = file_in_same_dir(image->path, fn); | |
96 | if (!l[i]) | |
97 | return NULL; | |
98 | ||
ae2a15bc | 99 | return TAKE_PTR(l); |
8e0b6570 LP |
100 | } |
101 | ||
bafbac4e LP |
102 | static char *image_roothash_path(Image *image) { |
103 | const char *fn; | |
104 | ||
105 | assert(image); | |
106 | ||
107 | fn = strjoina(image->name, ".roothash"); | |
108 | ||
109 | return file_in_same_dir(image->path, fn); | |
110 | } | |
111 | ||
c2ce6a3d | 112 | static int image_new( |
cd61c3bf | 113 | ImageType t, |
5fc7f358 | 114 | const char *pretty, |
cd61c3bf | 115 | const char *path, |
5fc7f358 | 116 | const char *filename, |
cd61c3bf | 117 | bool read_only, |
10f9c755 | 118 | usec_t crtime, |
cd61c3bf | 119 | usec_t mtime, |
c2ce6a3d | 120 | Image **ret) { |
cd61c3bf LP |
121 | |
122 | _cleanup_(image_unrefp) Image *i = NULL; | |
cd61c3bf | 123 | |
cd61c3bf LP |
124 | assert(t >= 0); |
125 | assert(t < _IMAGE_TYPE_MAX); | |
5fc7f358 LP |
126 | assert(pretty); |
127 | assert(filename); | |
c2ce6a3d | 128 | assert(ret); |
cd61c3bf | 129 | |
c2ce6a3d | 130 | i = new0(Image, 1); |
cd61c3bf LP |
131 | if (!i) |
132 | return -ENOMEM; | |
133 | ||
134 | i->type = t; | |
135 | i->read_only = read_only; | |
10f9c755 | 136 | i->crtime = crtime; |
cd61c3bf | 137 | i->mtime = mtime; |
c19de711 | 138 | i->usage = i->usage_exclusive = (uint64_t) -1; |
b6b18498 | 139 | i->limit = i->limit_exclusive = (uint64_t) -1; |
cd61c3bf | 140 | |
5fc7f358 | 141 | i->name = strdup(pretty); |
cd61c3bf LP |
142 | if (!i->name) |
143 | return -ENOMEM; | |
144 | ||
5fc7f358 | 145 | if (path) |
605405c6 | 146 | i->path = strjoin(path, "/", filename); |
5fc7f358 LP |
147 | else |
148 | i->path = strdup(filename); | |
5fc7f358 LP |
149 | if (!i->path) |
150 | return -ENOMEM; | |
151 | ||
152 | path_kill_slashes(i->path); | |
cd61c3bf | 153 | |
1cc6c93a | 154 | *ret = TAKE_PTR(i); |
c2ce6a3d | 155 | |
cd61c3bf LP |
156 | return 0; |
157 | } | |
158 | ||
4756c94e LP |
159 | static int extract_pretty(const char *path, const char *suffix, char **ret) { |
160 | _cleanup_free_ char *name = NULL; | |
161 | const char *p; | |
162 | size_t n; | |
163 | ||
164 | assert(path); | |
165 | assert(ret); | |
166 | ||
167 | p = last_path_component(path); | |
168 | n = strcspn(p, "/"); | |
169 | ||
170 | name = strndup(p, n); | |
171 | if (!name) | |
172 | return -ENOMEM; | |
173 | ||
174 | if (suffix) { | |
175 | char *e; | |
176 | ||
177 | e = endswith(name, suffix); | |
178 | if (!e) | |
179 | return -EINVAL; | |
180 | ||
181 | *e = 0; | |
182 | } | |
183 | ||
184 | if (!image_name_is_valid(name)) | |
185 | return -EINVAL; | |
186 | ||
187 | *ret = TAKE_PTR(name); | |
188 | return 0; | |
189 | } | |
190 | ||
5fc7f358 LP |
191 | static int image_make( |
192 | const char *pretty, | |
193 | int dfd, | |
194 | const char *path, | |
195 | const char *filename, | |
3a6ce860 | 196 | const struct stat *st, |
5fc7f358 LP |
197 | Image **ret) { |
198 | ||
4756c94e | 199 | _cleanup_free_ char *pretty_buffer = NULL; |
3a6ce860 | 200 | struct stat stbuf; |
5fc7f358 | 201 | bool read_only; |
cd61c3bf LP |
202 | int r; |
203 | ||
3a6ce860 | 204 | assert(dfd >= 0 || dfd == AT_FDCWD); |
5fc7f358 | 205 | assert(filename); |
cd61c3bf | 206 | |
eb38edce | 207 | /* We explicitly *do* follow symlinks here, since we want to allow symlinking trees, raw files and block |
3a6ce860 LP |
208 | * devices into /var/lib/machines/, and treat them normally. |
209 | * | |
210 | * This function returns -ENOENT if we can't find the image after all, and -EMEDIUMTYPE if it's not a file we | |
211 | * recognize. */ | |
cd61c3bf | 212 | |
3a6ce860 LP |
213 | if (!st) { |
214 | if (fstatat(dfd, filename, &stbuf, 0) < 0) | |
215 | return -errno; | |
216 | ||
217 | st = &stbuf; | |
218 | } | |
cd61c3bf | 219 | |
5fc7f358 LP |
220 | read_only = |
221 | (path && path_startswith(path, "/usr")) || | |
08ff5529 | 222 | (faccessat(dfd, filename, W_OK, AT_EACCESS) < 0 && errno == EROFS); |
86e339c8 | 223 | |
3a6ce860 | 224 | if (S_ISDIR(st->st_mode)) { |
01b72568 LP |
225 | _cleanup_close_ int fd = -1; |
226 | unsigned file_attr = 0; | |
cd61c3bf | 227 | |
c2ce6a3d | 228 | if (!ret) |
3a6ce860 | 229 | return 0; |
cd61c3bf | 230 | |
4756c94e LP |
231 | if (!pretty) { |
232 | r = extract_pretty(filename, NULL, &pretty_buffer); | |
233 | if (r < 0) | |
234 | return r; | |
235 | ||
236 | pretty = pretty_buffer; | |
237 | } | |
5fc7f358 | 238 | |
01b72568 LP |
239 | fd = openat(dfd, filename, O_CLOEXEC|O_NOCTTY|O_DIRECTORY); |
240 | if (fd < 0) | |
241 | return -errno; | |
242 | ||
c2ce6a3d | 243 | /* btrfs subvolumes have inode 256 */ |
3a6ce860 | 244 | if (st->st_ino == 256) { |
cd61c3bf | 245 | |
21222ea5 LP |
246 | r = btrfs_is_filesystem(fd); |
247 | if (r < 0) | |
248 | return r; | |
249 | if (r) { | |
10f9c755 | 250 | BtrfsSubvolInfo info; |
cd61c3bf | 251 | |
c2ce6a3d | 252 | /* It's a btrfs subvolume */ |
cd61c3bf | 253 | |
5bcd08db | 254 | r = btrfs_subvol_get_info_fd(fd, 0, &info); |
10f9c755 LP |
255 | if (r < 0) |
256 | return r; | |
c2ce6a3d LP |
257 | |
258 | r = image_new(IMAGE_SUBVOLUME, | |
5fc7f358 | 259 | pretty, |
c2ce6a3d | 260 | path, |
5fc7f358 LP |
261 | filename, |
262 | info.read_only || read_only, | |
10f9c755 | 263 | info.otime, |
c2ce6a3d | 264 | 0, |
c2ce6a3d LP |
265 | ret); |
266 | if (r < 0) | |
267 | return r; | |
268 | ||
5bcd08db LP |
269 | if (btrfs_quota_scan_ongoing(fd) == 0) { |
270 | BtrfsQuotaInfo quota; | |
b6b18498 | 271 | |
5bcd08db LP |
272 | r = btrfs_subvol_get_subtree_quota_fd(fd, 0, "a); |
273 | if (r >= 0) { | |
274 | (*ret)->usage = quota.referenced; | |
275 | (*ret)->usage_exclusive = quota.exclusive; | |
276 | ||
277 | (*ret)->limit = quota.referenced_max; | |
278 | (*ret)->limit_exclusive = quota.exclusive_max; | |
279 | } | |
b6b18498 LP |
280 | } |
281 | ||
3a6ce860 | 282 | return 0; |
cd61c3bf | 283 | } |
c2ce6a3d | 284 | } |
cd61c3bf | 285 | |
01b72568 LP |
286 | /* If the IMMUTABLE bit is set, we consider the |
287 | * directory read-only. Since the ioctl is not | |
288 | * supported everywhere we ignore failures. */ | |
289 | (void) read_attr_fd(fd, &file_attr); | |
cd61c3bf | 290 | |
01b72568 | 291 | /* It's just a normal directory. */ |
c2ce6a3d | 292 | r = image_new(IMAGE_DIRECTORY, |
5fc7f358 | 293 | pretty, |
c2ce6a3d | 294 | path, |
5fc7f358 | 295 | filename, |
01b72568 | 296 | read_only || (file_attr & FS_IMMUTABLE_FL), |
c2ce6a3d LP |
297 | 0, |
298 | 0, | |
299 | ret); | |
300 | if (r < 0) | |
301 | return r; | |
cd61c3bf | 302 | |
3a6ce860 | 303 | return 0; |
cd61c3bf | 304 | |
3a6ce860 | 305 | } else if (S_ISREG(st->st_mode) && endswith(filename, ".raw")) { |
10f9c755 | 306 | usec_t crtime = 0; |
cd61c3bf | 307 | |
aceac2f0 | 308 | /* It's a RAW disk image */ |
cd61c3bf | 309 | |
c2ce6a3d | 310 | if (!ret) |
3a6ce860 | 311 | return 0; |
cd61c3bf | 312 | |
4756c94e | 313 | (void) fd_getcrtime_at(dfd, filename, &crtime, 0); |
10f9c755 | 314 | |
4756c94e LP |
315 | if (!pretty) { |
316 | r = extract_pretty(filename, ".raw", &pretty_buffer); | |
317 | if (r < 0) | |
318 | return r; | |
319 | ||
320 | pretty = pretty_buffer; | |
321 | } | |
10f9c755 | 322 | |
aceac2f0 | 323 | r = image_new(IMAGE_RAW, |
5fc7f358 | 324 | pretty, |
c2ce6a3d | 325 | path, |
5fc7f358 | 326 | filename, |
3a6ce860 | 327 | !(st->st_mode & 0222) || read_only, |
10f9c755 | 328 | crtime, |
3a6ce860 | 329 | timespec_load(&st->st_mtim), |
c2ce6a3d LP |
330 | ret); |
331 | if (r < 0) | |
332 | return r; | |
cd61c3bf | 333 | |
3a6ce860 LP |
334 | (*ret)->usage = (*ret)->usage_exclusive = st->st_blocks * 512; |
335 | (*ret)->limit = (*ret)->limit_exclusive = st->st_size; | |
b6b18498 | 336 | |
3a6ce860 | 337 | return 0; |
eb38edce | 338 | |
3a6ce860 | 339 | } else if (S_ISBLK(st->st_mode)) { |
eb38edce LP |
340 | _cleanup_close_ int block_fd = -1; |
341 | uint64_t size = UINT64_MAX; | |
342 | ||
343 | /* A block device */ | |
344 | ||
345 | if (!ret) | |
3a6ce860 | 346 | return 0; |
eb38edce | 347 | |
4756c94e LP |
348 | if (!pretty) { |
349 | r = extract_pretty(filename, NULL, &pretty_buffer); | |
350 | if (r < 0) | |
351 | return r; | |
352 | ||
353 | pretty = pretty_buffer; | |
354 | } | |
eb38edce LP |
355 | |
356 | block_fd = openat(dfd, filename, O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_NOCTTY); | |
357 | if (block_fd < 0) | |
358 | log_debug_errno(errno, "Failed to open block device %s/%s, ignoring: %m", path, filename); | |
359 | else { | |
3a6ce860 LP |
360 | /* Refresh stat data after opening the node */ |
361 | if (fstat(block_fd, &stbuf) < 0) | |
eb38edce | 362 | return -errno; |
3a6ce860 LP |
363 | st = &stbuf; |
364 | ||
365 | if (!S_ISBLK(st->st_mode)) /* Verify that what we opened is actually what we think it is */ | |
eb38edce LP |
366 | return -ENOTTY; |
367 | ||
368 | if (!read_only) { | |
369 | int state = 0; | |
370 | ||
371 | if (ioctl(block_fd, BLKROGET, &state) < 0) | |
372 | log_debug_errno(errno, "Failed to issue BLKROGET on device %s/%s, ignoring: %m", path, filename); | |
373 | else if (state) | |
374 | read_only = true; | |
375 | } | |
376 | ||
377 | if (ioctl(block_fd, BLKGETSIZE64, &size) < 0) | |
4c2e654b | 378 | log_debug_errno(errno, "Failed to issue BLKGETSIZE64 on device %s/%s, ignoring: %m", path, filename); |
eb38edce LP |
379 | |
380 | block_fd = safe_close(block_fd); | |
381 | } | |
382 | ||
383 | r = image_new(IMAGE_BLOCK, | |
384 | pretty, | |
385 | path, | |
386 | filename, | |
3a6ce860 | 387 | !(st->st_mode & 0222) || read_only, |
eb38edce LP |
388 | 0, |
389 | 0, | |
390 | ret); | |
391 | if (r < 0) | |
392 | return r; | |
393 | ||
394 | if (size != 0 && size != UINT64_MAX) | |
395 | (*ret)->usage = (*ret)->usage_exclusive = (*ret)->limit = (*ret)->limit_exclusive = size; | |
396 | ||
3a6ce860 | 397 | return 0; |
c2ce6a3d | 398 | } |
cd61c3bf | 399 | |
3a6ce860 | 400 | return -EMEDIUMTYPE; |
c2ce6a3d | 401 | } |
cd61c3bf | 402 | |
5ef46e5f | 403 | int image_find(ImageClass class, const char *name, Image **ret) { |
c2ce6a3d LP |
404 | const char *path; |
405 | int r; | |
cd61c3bf | 406 | |
5ef46e5f LP |
407 | assert(class >= 0); |
408 | assert(class < _IMAGE_CLASS_MAX); | |
c2ce6a3d | 409 | assert(name); |
cd61c3bf | 410 | |
c2ce6a3d LP |
411 | /* There are no images with invalid names */ |
412 | if (!image_name_is_valid(name)) | |
3a6ce860 | 413 | return -ENOENT; |
cd61c3bf | 414 | |
5ef46e5f | 415 | NULSTR_FOREACH(path, image_search_path[class]) { |
c2ce6a3d | 416 | _cleanup_closedir_ DIR *d = NULL; |
3a6ce860 | 417 | struct stat st; |
cd61c3bf | 418 | |
c2ce6a3d LP |
419 | d = opendir(path); |
420 | if (!d) { | |
421 | if (errno == ENOENT) | |
422 | continue; | |
cd61c3bf | 423 | |
c2ce6a3d LP |
424 | return -errno; |
425 | } | |
cd61c3bf | 426 | |
3a6ce860 LP |
427 | /* As mentioned above, we follow symlinks on this fstatat(), because we want to permit people to |
428 | * symlink block devices into the search path */ | |
429 | if (fstatat(dirfd(d), name, &st, 0) < 0) { | |
aceac2f0 | 430 | _cleanup_free_ char *raw = NULL; |
5fc7f358 | 431 | |
3a6ce860 LP |
432 | if (errno != ENOENT) |
433 | return -errno; | |
434 | ||
aceac2f0 LP |
435 | raw = strappend(name, ".raw"); |
436 | if (!raw) | |
5fc7f358 LP |
437 | return -ENOMEM; |
438 | ||
3a6ce860 LP |
439 | if (fstatat(dirfd(d), raw, &st, 0) < 0) { |
440 | ||
441 | if (errno == ENOENT) | |
442 | continue; | |
443 | ||
444 | return -errno; | |
445 | } | |
446 | ||
447 | if (!S_ISREG(st.st_mode)) | |
5fc7f358 | 448 | continue; |
3a6ce860 LP |
449 | |
450 | r = image_make(name, dirfd(d), path, raw, &st, ret); | |
451 | ||
452 | } else { | |
453 | if (!S_ISDIR(st.st_mode) && !S_ISBLK(st.st_mode)) | |
454 | continue; | |
455 | ||
456 | r = image_make(name, dirfd(d), path, name, &st, ret); | |
5fc7f358 | 457 | } |
3a6ce860 LP |
458 | if (IN_SET(r, -ENOENT, -EMEDIUMTYPE)) |
459 | continue; | |
c2ce6a3d LP |
460 | if (r < 0) |
461 | return r; | |
cd61c3bf | 462 | |
c2ce6a3d LP |
463 | return 1; |
464 | } | |
465 | ||
5ef46e5f | 466 | if (class == IMAGE_MACHINE && streq(name, ".host")) |
3a6ce860 | 467 | return image_make(".host", AT_FDCWD, NULL, "/", NULL, ret); |
5fc7f358 | 468 | |
3a6ce860 | 469 | return -ENOENT; |
c2ce6a3d LP |
470 | }; |
471 | ||
5ef46e5f | 472 | int image_discover(ImageClass class, Hashmap *h) { |
c2ce6a3d LP |
473 | const char *path; |
474 | int r; | |
475 | ||
5ef46e5f LP |
476 | assert(class >= 0); |
477 | assert(class < _IMAGE_CLASS_MAX); | |
c2ce6a3d LP |
478 | assert(h); |
479 | ||
5ef46e5f | 480 | NULSTR_FOREACH(path, image_search_path[class]) { |
c2ce6a3d LP |
481 | _cleanup_closedir_ DIR *d = NULL; |
482 | struct dirent *de; | |
483 | ||
484 | d = opendir(path); | |
485 | if (!d) { | |
486 | if (errno == ENOENT) | |
a67a4c8c | 487 | continue; |
c2ce6a3d LP |
488 | |
489 | return -errno; | |
490 | } | |
491 | ||
492 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
493 | _cleanup_(image_unrefp) Image *image = NULL; | |
1bf36bf9 | 494 | _cleanup_free_ char *truncated = NULL; |
3a6ce860 LP |
495 | const char *pretty; |
496 | struct stat st; | |
c2ce6a3d | 497 | |
1bf36bf9 | 498 | if (dot_or_dot_dot(de->d_name)) |
c2ce6a3d LP |
499 | continue; |
500 | ||
3a6ce860 LP |
501 | /* As mentioned above, we follow symlinks on this fstatat(), because we want to permit people |
502 | * to symlink block devices into the search path */ | |
503 | if (fstatat(dirfd(d), de->d_name, &st, 0) < 0) { | |
504 | if (errno == ENOENT) | |
505 | continue; | |
506 | ||
507 | return -errno; | |
508 | } | |
509 | ||
510 | if (S_ISREG(st.st_mode)) { | |
511 | const char *e; | |
512 | ||
513 | e = endswith(de->d_name, ".raw"); | |
514 | if (!e) | |
515 | continue; | |
516 | ||
1bf36bf9 LP |
517 | truncated = strndup(de->d_name, e - de->d_name); |
518 | if (!truncated) | |
519 | return -ENOMEM; | |
520 | ||
521 | pretty = truncated; | |
3a6ce860 | 522 | } else if (S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) |
1bf36bf9 | 523 | pretty = de->d_name; |
3a6ce860 LP |
524 | else |
525 | continue; | |
1bf36bf9 LP |
526 | |
527 | if (!image_name_is_valid(pretty)) | |
528 | continue; | |
529 | ||
530 | if (hashmap_contains(h, pretty)) | |
c2ce6a3d LP |
531 | continue; |
532 | ||
3a6ce860 LP |
533 | r = image_make(pretty, dirfd(d), path, de->d_name, &st, &image); |
534 | if (IN_SET(r, -ENOENT, -EMEDIUMTYPE)) | |
c2ce6a3d LP |
535 | continue; |
536 | if (r < 0) | |
537 | return r; | |
538 | ||
539 | r = hashmap_put(h, image->name, image); | |
540 | if (r < 0) | |
541 | return r; | |
542 | ||
543 | image = NULL; | |
cd61c3bf LP |
544 | } |
545 | } | |
546 | ||
5ef46e5f | 547 | if (class == IMAGE_MACHINE && !hashmap_contains(h, ".host")) { |
5fc7f358 LP |
548 | _cleanup_(image_unrefp) Image *image = NULL; |
549 | ||
3a6ce860 | 550 | r = image_make(".host", AT_FDCWD, NULL, "/", NULL, &image); |
5fc7f358 LP |
551 | if (r < 0) |
552 | return r; | |
553 | ||
554 | r = hashmap_put(h, image->name, image); | |
555 | if (r < 0) | |
556 | return r; | |
557 | ||
558 | image = NULL; | |
559 | ||
560 | } | |
561 | ||
cd61c3bf LP |
562 | return 0; |
563 | } | |
564 | ||
08682124 | 565 | int image_remove(Image *i) { |
8e766630 | 566 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
8e0b6570 | 567 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 568 | _cleanup_free_ char *roothash = NULL; |
8e0b6570 | 569 | char **j; |
30535c16 LP |
570 | int r; |
571 | ||
08682124 LP |
572 | assert(i); |
573 | ||
d94c2b06 | 574 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
08682124 LP |
575 | return -EROFS; |
576 | ||
8e0b6570 LP |
577 | settings = image_settings_path(i); |
578 | if (!settings) | |
579 | return -ENOMEM; | |
580 | ||
bafbac4e LP |
581 | roothash = image_roothash_path(i); |
582 | if (!roothash) | |
583 | return -ENOMEM; | |
584 | ||
30535c16 LP |
585 | /* Make sure we don't interfere with a running nspawn */ |
586 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
ebd93cb6 LP |
590 | switch (i->type) { |
591 | ||
592 | case IMAGE_SUBVOLUME: | |
9fb0b9c7 LP |
593 | |
594 | /* Let's unlink first, maybe it is a symlink? If that works we are happy. Otherwise, let's get out the | |
595 | * big guns */ | |
596 | if (unlink(i->path) < 0) { | |
597 | r = btrfs_subvol_remove(i->path, BTRFS_REMOVE_RECURSIVE|BTRFS_REMOVE_QUOTA); | |
598 | if (r < 0) | |
599 | return r; | |
600 | } | |
601 | ||
8e0b6570 | 602 | break; |
ebd93cb6 LP |
603 | |
604 | case IMAGE_DIRECTORY: | |
01b72568 | 605 | /* Allow deletion of read-only directories */ |
a67d68b8 | 606 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
8e0b6570 LP |
607 | r = rm_rf(i->path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
608 | if (r < 0) | |
609 | return r; | |
610 | ||
611 | break; | |
01b72568 | 612 | |
eb38edce LP |
613 | case IMAGE_BLOCK: |
614 | ||
615 | /* If this is inside of /dev, then it's a real block device, hence let's not touch the device node | |
616 | * itself (but let's remove the stuff stored alongside it). If it's anywhere else, let's try to unlink | |
617 | * the thing (it's most likely a symlink after all). */ | |
618 | ||
619 | if (path_startswith(i->path, "/dev")) | |
620 | break; | |
621 | ||
4831981d | 622 | _fallthrough_; |
aceac2f0 | 623 | case IMAGE_RAW: |
41d1ed05 LP |
624 | if (unlink(i->path) < 0) |
625 | return -errno; | |
8e0b6570 | 626 | break; |
ebd93cb6 LP |
627 | |
628 | default: | |
15411c0c | 629 | return -EOPNOTSUPP; |
ebd93cb6 | 630 | } |
8e0b6570 LP |
631 | |
632 | STRV_FOREACH(j, settings) { | |
633 | if (unlink(*j) < 0 && errno != ENOENT) | |
634 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", *j); | |
635 | } | |
636 | ||
bafbac4e LP |
637 | if (unlink(roothash) < 0 && errno != ENOENT) |
638 | log_debug_errno(errno, "Failed to unlink %s, ignoring: %m", roothash); | |
639 | ||
8e0b6570 LP |
640 | return 0; |
641 | } | |
642 | ||
bafbac4e | 643 | static int rename_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
644 | _cleanup_free_ char *rs = NULL; |
645 | const char *fn; | |
646 | ||
bafbac4e | 647 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
648 | |
649 | rs = file_in_same_dir(path, fn); | |
650 | if (!rs) | |
651 | return -ENOMEM; | |
652 | ||
653 | return rename_noreplace(AT_FDCWD, path, AT_FDCWD, rs); | |
ebd93cb6 LP |
654 | } |
655 | ||
656 | int image_rename(Image *i, const char *new_name) { | |
8e766630 | 657 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT, name_lock = LOCK_FILE_INIT; |
bafbac4e | 658 | _cleanup_free_ char *new_path = NULL, *nn = NULL, *roothash = NULL; |
8e0b6570 | 659 | _cleanup_strv_free_ char **settings = NULL; |
01b72568 | 660 | unsigned file_attr = 0; |
8e0b6570 | 661 | char **j; |
ebd93cb6 LP |
662 | int r; |
663 | ||
664 | assert(i); | |
665 | ||
666 | if (!image_name_is_valid(new_name)) | |
667 | return -EINVAL; | |
668 | ||
d94c2b06 | 669 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
670 | return -EROFS; |
671 | ||
8e0b6570 LP |
672 | settings = image_settings_path(i); |
673 | if (!settings) | |
674 | return -ENOMEM; | |
675 | ||
bafbac4e LP |
676 | roothash = image_roothash_path(i); |
677 | if (!roothash) | |
678 | return -ENOMEM; | |
679 | ||
30535c16 LP |
680 | /* Make sure we don't interfere with a running nspawn */ |
681 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
682 | if (r < 0) | |
683 | return r; | |
684 | ||
685 | /* Make sure nobody takes the new name, between the time we | |
686 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 687 | * time we take possession of it */ |
30535c16 LP |
688 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
689 | if (r < 0) | |
690 | return r; | |
691 | ||
5ef46e5f | 692 | r = image_find(IMAGE_MACHINE, new_name, NULL); |
3a6ce860 | 693 | if (r >= 0) |
ebd93cb6 | 694 | return -EEXIST; |
3a6ce860 LP |
695 | if (r != -ENOENT) |
696 | return r; | |
ebd93cb6 LP |
697 | |
698 | switch (i->type) { | |
699 | ||
ebd93cb6 | 700 | case IMAGE_DIRECTORY: |
01b72568 LP |
701 | /* Turn of the immutable bit while we rename the image, so that we can rename it */ |
702 | (void) read_attr_path(i->path, &file_attr); | |
703 | ||
704 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 705 | (void) chattr_path(i->path, 0, FS_IMMUTABLE_FL); |
01b72568 | 706 | |
4831981d | 707 | _fallthrough_; |
01b72568 | 708 | case IMAGE_SUBVOLUME: |
ebd93cb6 LP |
709 | new_path = file_in_same_dir(i->path, new_name); |
710 | break; | |
711 | ||
eb38edce LP |
712 | case IMAGE_BLOCK: |
713 | ||
714 | /* Refuse renaming raw block devices in /dev, the names are picked by udev after all. */ | |
715 | if (path_startswith(i->path, "/dev")) | |
716 | return -EROFS; | |
717 | ||
718 | new_path = file_in_same_dir(i->path, new_name); | |
719 | break; | |
720 | ||
aceac2f0 | 721 | case IMAGE_RAW: { |
ebd93cb6 LP |
722 | const char *fn; |
723 | ||
63c372cb | 724 | fn = strjoina(new_name, ".raw"); |
ebd93cb6 LP |
725 | new_path = file_in_same_dir(i->path, fn); |
726 | break; | |
727 | } | |
728 | ||
729 | default: | |
15411c0c | 730 | return -EOPNOTSUPP; |
ebd93cb6 LP |
731 | } |
732 | ||
733 | if (!new_path) | |
734 | return -ENOMEM; | |
735 | ||
736 | nn = strdup(new_name); | |
737 | if (!nn) | |
738 | return -ENOMEM; | |
739 | ||
f85ef957 AC |
740 | r = rename_noreplace(AT_FDCWD, i->path, AT_FDCWD, new_path); |
741 | if (r < 0) | |
742 | return r; | |
ebd93cb6 | 743 | |
01b72568 LP |
744 | /* Restore the immutable bit, if it was set before */ |
745 | if (file_attr & FS_IMMUTABLE_FL) | |
a67d68b8 | 746 | (void) chattr_path(new_path, FS_IMMUTABLE_FL, FS_IMMUTABLE_FL); |
01b72568 | 747 | |
f9ecfd3b DL |
748 | free_and_replace(i->path, new_path); |
749 | free_and_replace(i->name, nn); | |
ebd93cb6 | 750 | |
8e0b6570 | 751 | STRV_FOREACH(j, settings) { |
bafbac4e | 752 | r = rename_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
753 | if (r < 0 && r != -ENOENT) |
754 | log_debug_errno(r, "Failed to rename settings file %s, ignoring: %m", *j); | |
755 | } | |
756 | ||
bafbac4e LP |
757 | r = rename_auxiliary_file(roothash, new_name, ".roothash"); |
758 | if (r < 0 && r != -ENOENT) | |
759 | log_debug_errno(r, "Failed to rename roothash file %s, ignoring: %m", roothash); | |
760 | ||
ebd93cb6 LP |
761 | return 0; |
762 | } | |
763 | ||
bafbac4e | 764 | static int clone_auxiliary_file(const char *path, const char *new_name, const char *suffix) { |
8e0b6570 LP |
765 | _cleanup_free_ char *rs = NULL; |
766 | const char *fn; | |
767 | ||
bafbac4e | 768 | fn = strjoina(new_name, suffix); |
8e0b6570 LP |
769 | |
770 | rs = file_in_same_dir(path, fn); | |
771 | if (!rs) | |
772 | return -ENOMEM; | |
773 | ||
1c876927 | 774 | return copy_file_atomic(path, rs, 0664, 0, COPY_REFLINK); |
8e0b6570 LP |
775 | } |
776 | ||
ebd93cb6 | 777 | int image_clone(Image *i, const char *new_name, bool read_only) { |
8e766630 | 778 | _cleanup_(release_lock_file) LockFile name_lock = LOCK_FILE_INIT; |
8e0b6570 | 779 | _cleanup_strv_free_ char **settings = NULL; |
bafbac4e | 780 | _cleanup_free_ char *roothash = NULL; |
ebd93cb6 | 781 | const char *new_path; |
8e0b6570 | 782 | char **j; |
ebd93cb6 LP |
783 | int r; |
784 | ||
785 | assert(i); | |
786 | ||
787 | if (!image_name_is_valid(new_name)) | |
788 | return -EINVAL; | |
789 | ||
8e0b6570 LP |
790 | settings = image_settings_path(i); |
791 | if (!settings) | |
792 | return -ENOMEM; | |
793 | ||
bafbac4e LP |
794 | roothash = image_roothash_path(i); |
795 | if (!roothash) | |
796 | return -ENOMEM; | |
797 | ||
30535c16 LP |
798 | /* Make sure nobody takes the new name, between the time we |
799 | * checked it is currently unused in all search paths, and the | |
f8e2f4d6 | 800 | * time we take possession of it */ |
30535c16 LP |
801 | r = image_name_lock(new_name, LOCK_EX|LOCK_NB, &name_lock); |
802 | if (r < 0) | |
803 | return r; | |
804 | ||
5ef46e5f | 805 | r = image_find(IMAGE_MACHINE, new_name, NULL); |
3a6ce860 | 806 | if (r >= 0) |
ebd93cb6 | 807 | return -EEXIST; |
3a6ce860 LP |
808 | if (r != -ENOENT) |
809 | return r; | |
ebd93cb6 LP |
810 | |
811 | switch (i->type) { | |
812 | ||
813 | case IMAGE_SUBVOLUME: | |
814 | case IMAGE_DIRECTORY: | |
9a50e3ca | 815 | /* If we can we'll always try to create a new btrfs subvolume here, even if the source is a plain |
13e785f7 | 816 | * directory. */ |
9a50e3ca | 817 | |
63c372cb | 818 | new_path = strjoina("/var/lib/machines/", new_name); |
ebd93cb6 | 819 | |
17cbb288 LP |
820 | r = btrfs_subvol_snapshot(i->path, new_path, |
821 | (read_only ? BTRFS_SNAPSHOT_READ_ONLY : 0) | | |
822 | BTRFS_SNAPSHOT_FALLBACK_COPY | | |
823 | BTRFS_SNAPSHOT_FALLBACK_DIRECTORY | | |
824 | BTRFS_SNAPSHOT_FALLBACK_IMMUTABLE | | |
825 | BTRFS_SNAPSHOT_RECURSIVE | | |
826 | BTRFS_SNAPSHOT_QUOTA); | |
827 | if (r >= 0) | |
9a50e3ca | 828 | /* Enable "subtree" quotas for the copy, if we didn't copy any quota from the source. */ |
8120ee28 | 829 | (void) btrfs_subvol_auto_qgroup(new_path, 0, true); |
5bcd08db | 830 | |
ebd93cb6 LP |
831 | break; |
832 | ||
aceac2f0 | 833 | case IMAGE_RAW: |
63c372cb | 834 | new_path = strjoina("/var/lib/machines/", new_name, ".raw"); |
ebd93cb6 | 835 | |
1c876927 | 836 | r = copy_file_atomic(i->path, new_path, read_only ? 0444 : 0644, FS_NOCOW_FL, COPY_REFLINK); |
ebd93cb6 LP |
837 | break; |
838 | ||
eb38edce | 839 | case IMAGE_BLOCK: |
ebd93cb6 | 840 | default: |
15411c0c | 841 | return -EOPNOTSUPP; |
ebd93cb6 LP |
842 | } |
843 | ||
844 | if (r < 0) | |
845 | return r; | |
846 | ||
8e0b6570 | 847 | STRV_FOREACH(j, settings) { |
bafbac4e | 848 | r = clone_auxiliary_file(*j, new_name, ".nspawn"); |
8e0b6570 LP |
849 | if (r < 0 && r != -ENOENT) |
850 | log_debug_errno(r, "Failed to clone settings %s, ignoring: %m", *j); | |
851 | } | |
852 | ||
bafbac4e LP |
853 | r = clone_auxiliary_file(roothash, new_name, ".roothash"); |
854 | if (r < 0 && r != -ENOENT) | |
855 | log_debug_errno(r, "Failed to clone root hash file %s, ignoring: %m", roothash); | |
856 | ||
ebd93cb6 LP |
857 | return 0; |
858 | } | |
859 | ||
860 | int image_read_only(Image *i, bool b) { | |
8e766630 | 861 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
ebd93cb6 | 862 | int r; |
c7664c07 | 863 | |
ebd93cb6 LP |
864 | assert(i); |
865 | ||
d94c2b06 | 866 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
ebd93cb6 LP |
867 | return -EROFS; |
868 | ||
30535c16 LP |
869 | /* Make sure we don't interfere with a running nspawn */ |
870 | r = image_path_lock(i->path, LOCK_EX|LOCK_NB, &global_lock, &local_lock); | |
871 | if (r < 0) | |
872 | return r; | |
873 | ||
ebd93cb6 LP |
874 | switch (i->type) { |
875 | ||
876 | case IMAGE_SUBVOLUME: | |
5bcd08db LP |
877 | |
878 | /* Note that we set the flag only on the top-level | |
879 | * subvolume of the image. */ | |
880 | ||
ebd93cb6 LP |
881 | r = btrfs_subvol_set_read_only(i->path, b); |
882 | if (r < 0) | |
883 | return r; | |
01b72568 LP |
884 | |
885 | break; | |
886 | ||
887 | case IMAGE_DIRECTORY: | |
888 | /* For simple directory trees we cannot use the access | |
889 | mode of the top-level directory, since it has an | |
890 | effect on the container itself. However, we can | |
891 | use the "immutable" flag, to at least make the | |
892 | top-level directory read-only. It's not as good as | |
893 | a read-only subvolume, but at least something, and | |
13e785f7 | 894 | we can read the value back. */ |
01b72568 | 895 | |
a67d68b8 | 896 | r = chattr_path(i->path, b ? FS_IMMUTABLE_FL : 0, FS_IMMUTABLE_FL); |
01b72568 LP |
897 | if (r < 0) |
898 | return r; | |
899 | ||
ebd93cb6 LP |
900 | break; |
901 | ||
aceac2f0 | 902 | case IMAGE_RAW: { |
ebd93cb6 LP |
903 | struct stat st; |
904 | ||
905 | if (stat(i->path, &st) < 0) | |
906 | return -errno; | |
907 | ||
908 | if (chmod(i->path, (st.st_mode & 0444) | (b ? 0000 : 0200)) < 0) | |
909 | return -errno; | |
f2068bcc LP |
910 | |
911 | /* If the images is now read-only, it's a good time to | |
912 | * defrag it, given that no write patterns will | |
913 | * fragment it again. */ | |
914 | if (b) | |
915 | (void) btrfs_defrag(i->path); | |
ebd93cb6 LP |
916 | break; |
917 | } | |
918 | ||
eb38edce LP |
919 | case IMAGE_BLOCK: { |
920 | _cleanup_close_ int fd = -1; | |
921 | struct stat st; | |
922 | int state = b; | |
923 | ||
924 | fd = open(i->path, O_CLOEXEC|O_RDONLY|O_NONBLOCK|O_NOCTTY); | |
925 | if (fd < 0) | |
926 | return -errno; | |
927 | ||
928 | if (fstat(fd, &st) < 0) | |
929 | return -errno; | |
930 | if (!S_ISBLK(st.st_mode)) | |
931 | return -ENOTTY; | |
932 | ||
933 | if (ioctl(fd, BLKROSET, &state) < 0) | |
934 | return -errno; | |
935 | ||
936 | break; | |
937 | } | |
938 | ||
ebd93cb6 | 939 | default: |
15411c0c | 940 | return -EOPNOTSUPP; |
ebd93cb6 LP |
941 | } |
942 | ||
943 | return 0; | |
08682124 LP |
944 | } |
945 | ||
30535c16 LP |
946 | int image_path_lock(const char *path, int operation, LockFile *global, LockFile *local) { |
947 | _cleanup_free_ char *p = NULL; | |
948 | LockFile t = LOCK_FILE_INIT; | |
949 | struct stat st; | |
950 | int r; | |
951 | ||
952 | assert(path); | |
953 | assert(global); | |
954 | assert(local); | |
955 | ||
956 | /* Locks an image path. This actually creates two locks: one | |
957 | * "local" one, next to the image path itself, which might be | |
958 | * shared via NFS. And another "global" one, in /run, that | |
959 | * uses the device/inode number. This has the benefit that we | |
960 | * can even lock a tree that is a mount point, correctly. */ | |
961 | ||
30535c16 LP |
962 | if (!path_is_absolute(path)) |
963 | return -EINVAL; | |
964 | ||
b6e953f2 LP |
965 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
966 | *local = *global = (LockFile) LOCK_FILE_INIT; | |
967 | return 0; | |
968 | } | |
969 | ||
970 | if (path_equal(path, "/")) | |
971 | return -EBUSY; | |
972 | ||
30535c16 | 973 | if (stat(path, &st) >= 0) { |
eb38edce LP |
974 | if (S_ISBLK(st.st_mode)) |
975 | r = asprintf(&p, "/run/systemd/nspawn/locks/block-%u:%u", major(st.st_rdev), minor(st.st_rdev)); | |
976 | else if (S_ISDIR(st.st_mode) || S_ISREG(st.st_mode)) | |
977 | r = asprintf(&p, "/run/systemd/nspawn/locks/inode-%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino); | |
978 | else | |
979 | return -ENOTTY; | |
980 | ||
981 | if (r < 0) | |
30535c16 LP |
982 | return -ENOMEM; |
983 | } | |
984 | ||
eb38edce LP |
985 | /* For block devices we don't need the "local" lock, as the major/minor lock above should be sufficient, since |
986 | * block devices are device local anyway. */ | |
987 | if (!path_startswith(path, "/dev")) { | |
988 | r = make_lock_file_for(path, operation, &t); | |
8be17c9b LT |
989 | if (r < 0) { |
990 | if ((operation & LOCK_SH) && r == -EROFS) | |
771b7ead | 991 | log_debug_errno(r, "Failed to create shared lock for '%s', ignoring: %m", path); |
8be17c9b LT |
992 | else |
993 | return r; | |
994 | } | |
eb38edce | 995 | } |
30535c16 LP |
996 | |
997 | if (p) { | |
7e7cddb2 | 998 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
30535c16 LP |
999 | |
1000 | r = make_lock_file(p, operation, global); | |
1001 | if (r < 0) { | |
1002 | release_lock_file(&t); | |
1003 | return r; | |
1004 | } | |
546dbec5 LP |
1005 | } else |
1006 | *global = (LockFile) LOCK_FILE_INIT; | |
30535c16 LP |
1007 | |
1008 | *local = t; | |
1009 | return 0; | |
1010 | } | |
1011 | ||
cb81cd80 | 1012 | int image_set_limit(Image *i, uint64_t referenced_max) { |
d6ce17c7 LP |
1013 | assert(i); |
1014 | ||
d94c2b06 | 1015 | if (IMAGE_IS_VENDOR(i) || IMAGE_IS_HOST(i)) |
d6ce17c7 LP |
1016 | return -EROFS; |
1017 | ||
1018 | if (i->type != IMAGE_SUBVOLUME) | |
15411c0c | 1019 | return -EOPNOTSUPP; |
d6ce17c7 | 1020 | |
5bcd08db LP |
1021 | /* We set the quota both for the subvolume as well as for the |
1022 | * subtree. The latter is mostly for historical reasons, since | |
1023 | * we didn't use to have a concept of subtree quota, and hence | |
1024 | * only modified the subvolume quota. */ | |
1025 | ||
1026 | (void) btrfs_qgroup_set_limit(i->path, 0, referenced_max); | |
1027 | (void) btrfs_subvol_auto_qgroup(i->path, 0, true); | |
1028 | return btrfs_subvol_set_subtree_quota_limit(i->path, 0, referenced_max); | |
d6ce17c7 LP |
1029 | } |
1030 | ||
c7664c07 | 1031 | int image_read_metadata(Image *i) { |
8e766630 | 1032 | _cleanup_(release_lock_file) LockFile global_lock = LOCK_FILE_INIT, local_lock = LOCK_FILE_INIT; |
c7664c07 LP |
1033 | int r; |
1034 | ||
1035 | assert(i); | |
1036 | ||
1037 | r = image_path_lock(i->path, LOCK_SH|LOCK_NB, &global_lock, &local_lock); | |
1038 | if (r < 0) | |
1039 | return r; | |
1040 | ||
1041 | switch (i->type) { | |
1042 | ||
1043 | case IMAGE_SUBVOLUME: | |
1044 | case IMAGE_DIRECTORY: { | |
1045 | _cleanup_strv_free_ char **machine_info = NULL, **os_release = NULL; | |
1046 | sd_id128_t machine_id = SD_ID128_NULL; | |
1047 | _cleanup_free_ char *hostname = NULL; | |
1048 | _cleanup_free_ char *path = NULL; | |
d58ad743 | 1049 | _cleanup_fclose_ FILE *f = NULL; |
c7664c07 | 1050 | |
62570f6f | 1051 | r = chase_symlinks("/etc/hostname", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
1052 | if (r < 0 && r != -ENOENT) |
1053 | log_debug_errno(r, "Failed to chase /etc/hostname in image %s: %m", i->name); | |
1054 | else if (r >= 0) { | |
1055 | r = read_etc_hostname(path, &hostname); | |
1056 | if (r < 0) | |
1057 | log_debug_errno(errno, "Failed to read /etc/hostname of image %s: %m", i->name); | |
1058 | } | |
1059 | ||
1060 | path = mfree(path); | |
1061 | ||
62570f6f | 1062 | r = chase_symlinks("/etc/machine-id", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
1063 | if (r < 0 && r != -ENOENT) |
1064 | log_debug_errno(r, "Failed to chase /etc/machine-id in image %s: %m", i->name); | |
1065 | else if (r >= 0) { | |
1066 | _cleanup_close_ int fd = -1; | |
1067 | ||
1068 | fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
1069 | if (fd < 0) | |
1070 | log_debug_errno(errno, "Failed to open %s: %m", path); | |
1071 | else { | |
1072 | r = id128_read_fd(fd, ID128_PLAIN, &machine_id); | |
1073 | if (r < 0) | |
1074 | log_debug_errno(r, "Image %s contains invalid machine ID.", i->name); | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | path = mfree(path); | |
1079 | ||
62570f6f | 1080 | r = chase_symlinks("/etc/machine-info", i->path, CHASE_PREFIX_ROOT|CHASE_TRAIL_SLASH, &path); |
c7664c07 LP |
1081 | if (r < 0 && r != -ENOENT) |
1082 | log_debug_errno(r, "Failed to chase /etc/machine-info in image %s: %m", i->name); | |
1083 | else if (r >= 0) { | |
1084 | r = load_env_file_pairs(NULL, path, NULL, &machine_info); | |
1085 | if (r < 0) | |
1086 | log_debug_errno(r, "Failed to parse machine-info data of %s: %m", i->name); | |
1087 | } | |
1088 | ||
d58ad743 LP |
1089 | r = load_os_release_pairs(i->path, &os_release); |
1090 | if (r < 0) | |
1091 | log_debug_errno(r, "Failed to read os-release in image, ignoring: %m"); | |
c7664c07 LP |
1092 | |
1093 | free_and_replace(i->hostname, hostname); | |
1094 | i->machine_id = machine_id; | |
1095 | strv_free_and_replace(i->machine_info, machine_info); | |
1096 | strv_free_and_replace(i->os_release, os_release); | |
1097 | ||
1098 | break; | |
1099 | } | |
1100 | ||
1101 | case IMAGE_RAW: | |
1102 | case IMAGE_BLOCK: { | |
1103 | _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; | |
1104 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
1105 | ||
1106 | r = loop_device_make_by_path(i->path, O_RDONLY, &d); | |
1107 | if (r < 0) | |
1108 | return r; | |
1109 | ||
1110 | r = dissect_image(d->fd, NULL, 0, DISSECT_IMAGE_REQUIRE_ROOT, &m); | |
1111 | if (r < 0) | |
1112 | return r; | |
1113 | ||
1114 | r = dissected_image_acquire_metadata(m); | |
1115 | if (r < 0) | |
1116 | return r; | |
1117 | ||
1118 | free_and_replace(i->hostname, m->hostname); | |
1119 | i->machine_id = m->machine_id; | |
1120 | strv_free_and_replace(i->machine_info, m->machine_info); | |
1121 | strv_free_and_replace(i->os_release, m->os_release); | |
1122 | ||
1123 | break; | |
1124 | } | |
1125 | ||
1126 | default: | |
1127 | return -EOPNOTSUPP; | |
1128 | } | |
1129 | ||
1130 | i->metadata_valid = true; | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
30535c16 LP |
1135 | int image_name_lock(const char *name, int operation, LockFile *ret) { |
1136 | const char *p; | |
1137 | ||
1138 | assert(name); | |
1139 | assert(ret); | |
1140 | ||
1141 | /* Locks an image name, regardless of the precise path used. */ | |
1142 | ||
1143 | if (!image_name_is_valid(name)) | |
1144 | return -EINVAL; | |
1145 | ||
b6e953f2 LP |
1146 | if (getenv_bool("SYSTEMD_NSPAWN_LOCK") == 0) { |
1147 | *ret = (LockFile) LOCK_FILE_INIT; | |
1148 | return 0; | |
1149 | } | |
1150 | ||
30535c16 LP |
1151 | if (streq(name, ".host")) |
1152 | return -EBUSY; | |
1153 | ||
7e7cddb2 | 1154 | mkdir_p("/run/systemd/nspawn/locks", 0700); |
63c372cb | 1155 | p = strjoina("/run/systemd/nspawn/locks/name-", name); |
30535c16 LP |
1156 | |
1157 | return make_lock_file(p, operation, ret); | |
1158 | } | |
1159 | ||
1160 | bool image_name_is_valid(const char *s) { | |
1161 | if (!filename_is_valid(s)) | |
1162 | return false; | |
1163 | ||
1164 | if (string_has_cc(s, NULL)) | |
1165 | return false; | |
1166 | ||
1167 | if (!utf8_is_valid(s)) | |
1168 | return false; | |
1169 | ||
1170 | /* Temporary files for atomically creating new files */ | |
1171 | if (startswith(s, ".#")) | |
1172 | return false; | |
1173 | ||
1174 | return true; | |
1175 | } | |
1176 | ||
cd61c3bf LP |
1177 | static const char* const image_type_table[_IMAGE_TYPE_MAX] = { |
1178 | [IMAGE_DIRECTORY] = "directory", | |
1179 | [IMAGE_SUBVOLUME] = "subvolume", | |
aceac2f0 | 1180 | [IMAGE_RAW] = "raw", |
eb38edce | 1181 | [IMAGE_BLOCK] = "block", |
cd61c3bf LP |
1182 | }; |
1183 | ||
1184 | DEFINE_STRING_TABLE_LOOKUP(image_type, ImageType); |