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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
1a14a53c | 2 | |
1a14a53c | 3 | #include <stdlib.h> |
cf0fbc49 | 4 | #include <unistd.h> |
1a14a53c | 5 | |
85624f01 | 6 | #include "sd-device.h" |
07630cea LP |
7 | #include "sd-id128.h" |
8 | ||
b5efdb8a | 9 | #include "alloc-util.h" |
07630cea | 10 | #include "blkid-util.h" |
18c528e9 | 11 | #include "blockdev-util.h" |
07630cea | 12 | #include "btrfs-util.h" |
133432cc | 13 | #include "device-util.h" |
a0956174 | 14 | #include "dirent-util.h" |
72e18a98 | 15 | #include "dissect-image.h" |
1fac34b9 | 16 | #include "dropin.h" |
0bb2f0f1 | 17 | #include "efi-loader.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
07630cea | 19 | #include "fileio.h" |
2bef2582 | 20 | #include "fs-util.h" |
07630cea LP |
21 | #include "fstab-util.h" |
22 | #include "generator.h" | |
23 | #include "gpt.h" | |
07630cea | 24 | #include "mkdir.h" |
049af8ad | 25 | #include "mountpoint-util.h" |
6bedfcbb | 26 | #include "parse-util.h" |
07630cea | 27 | #include "path-util.h" |
4e731273 | 28 | #include "proc-cmdline.h" |
1a14a53c | 29 | #include "special.h" |
98bad05e | 30 | #include "specifier.h" |
8fcde012 | 31 | #include "stat-util.h" |
07630cea | 32 | #include "string-util.h" |
85624f01 | 33 | #include "strv.h" |
1a14a53c | 34 | #include "unit-name.h" |
07630cea | 35 | #include "util.h" |
9a5cb137 | 36 | #include "virt.h" |
1a14a53c | 37 | |
ec6e9597 | 38 | static const char *arg_dest = NULL; |
73b80ec2 LP |
39 | static bool arg_enabled = true; |
40 | static bool arg_root_enabled = true; | |
c94b2417 | 41 | static int arg_root_rw = -1; |
1a14a53c | 42 | |
3d92aa45 | 43 | static int open_parent_block_device(dev_t devnum, int *ret_fd) { |
9fe6f5cc ZJS |
44 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
45 | const char *name, *devtype, *node; | |
46 | sd_device *parent; | |
47 | dev_t pn; | |
48 | int fd, r; | |
49 | ||
3d92aa45 | 50 | assert(ret_fd); |
9fe6f5cc ZJS |
51 | |
52 | r = sd_device_new_from_devnum(&d, 'b', devnum); | |
53 | if (r < 0) | |
54 | return log_debug_errno(r, "Failed to open device: %m"); | |
55 | ||
56 | if (sd_device_get_devname(d, &name) < 0) { | |
57 | r = sd_device_get_syspath(d, &name); | |
58 | if (r < 0) { | |
3d92aa45 ZJS |
59 | log_device_debug_errno(d, r, "Device %u:%u does not have a name, ignoring: %m", |
60 | major(devnum), minor(devnum)); | |
9fe6f5cc ZJS |
61 | return 0; |
62 | } | |
63 | } | |
64 | ||
65 | r = sd_device_get_parent(d, &parent); | |
66 | if (r < 0) { | |
67 | log_device_debug_errno(d, r, "Not a partitioned device, ignoring: %m"); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | /* Does it have a devtype? */ | |
72 | r = sd_device_get_devtype(parent, &devtype); | |
73 | if (r < 0) { | |
74 | log_device_debug_errno(parent, r, "Parent doesn't have a device type, ignoring: %m"); | |
75 | return 0; | |
76 | } | |
77 | ||
78 | /* Is this a disk or a partition? We only care for disks... */ | |
79 | if (!streq(devtype, "disk")) { | |
80 | log_device_debug(parent, "Parent isn't a raw disk, ignoring."); | |
81 | return 0; | |
82 | } | |
83 | ||
84 | /* Does it have a device node? */ | |
85 | r = sd_device_get_devname(parent, &node); | |
86 | if (r < 0) { | |
87 | log_device_debug_errno(parent, r, "Parent device does not have device node, ignoring: %m"); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | log_device_debug(d, "Root device %s.", node); | |
92 | ||
93 | r = sd_device_get_devnum(parent, &pn); | |
94 | if (r < 0) { | |
95 | log_device_debug_errno(parent, r, "Parent device is not a proper block device, ignoring: %m"); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | fd = open(node, O_RDONLY|O_CLOEXEC|O_NOCTTY); | |
100 | if (fd < 0) | |
101 | return log_error_errno(errno, "Failed to open %s: %m", node); | |
102 | ||
3d92aa45 | 103 | *ret_fd = fd; |
9fe6f5cc ZJS |
104 | return 1; |
105 | } | |
106 | ||
01af8c01 | 107 | static int add_cryptsetup(const char *id, const char *what, bool rw, bool require, char **device) { |
5b137503 | 108 | #if HAVE_LIBCRYPTSETUP |
a7e88558 | 109 | _cleanup_free_ char *e = NULL, *n = NULL, *d = NULL; |
1af72119 | 110 | _cleanup_fclose_ FILE *f = NULL; |
1af72119 LP |
111 | int r; |
112 | ||
113 | assert(id); | |
114 | assert(what); | |
1af72119 | 115 | |
7410616c LP |
116 | r = unit_name_from_path(what, ".device", &d); |
117 | if (r < 0) | |
118 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
119 | |
120 | e = unit_name_escape(id); | |
121 | if (!e) | |
122 | return log_oom(); | |
123 | ||
7410616c LP |
124 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
125 | if (r < 0) | |
126 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 | 127 | |
a7e88558 LP |
128 | r = generator_open_unit_file(arg_dest, NULL, n, &f); |
129 | if (r < 0) | |
130 | return r; | |
98bad05e | 131 | |
a7e88558 LP |
132 | r = generator_write_cryptsetup_unit_section(f, NULL); |
133 | if (r < 0) | |
134 | return r; | |
1af72119 LP |
135 | |
136 | fprintf(f, | |
1af72119 | 137 | "Before=umount.target cryptsetup.target\n" |
a7e88558 LP |
138 | "Conflicts=umount.target\n" |
139 | "BindsTo=%s\n" | |
140 | "After=%s\n", | |
141 | d, d); | |
142 | ||
143 | r = generator_write_cryptsetup_service_section(f, id, what, NULL, rw ? NULL : "read-only"); | |
144 | if (r < 0) | |
145 | return r; | |
1af72119 | 146 | |
dacd6cee LP |
147 | r = fflush_and_check(f); |
148 | if (r < 0) | |
a7e88558 | 149 | return log_error_errno(r, "Failed to write file %s: %m", n); |
1af72119 | 150 | |
9cdcf368 ZJS |
151 | r = generator_add_symlink(arg_dest, d, "wants", n); |
152 | if (r < 0) | |
153 | return r; | |
1af72119 | 154 | |
1fac34b9 ZJS |
155 | const char *dmname; |
156 | dmname = strjoina("dev-mapper-", e, ".device"); | |
1af72119 | 157 | |
1fac34b9 | 158 | if (require) { |
9cdcf368 ZJS |
159 | r = generator_add_symlink(arg_dest, "cryptsetup.target", "requires", n); |
160 | if (r < 0) | |
161 | return r; | |
01af8c01 | 162 | |
9cdcf368 ZJS |
163 | r = generator_add_symlink(arg_dest, dmname, "requires", n); |
164 | if (r < 0) | |
165 | return r; | |
01af8c01 | 166 | } |
1af72119 | 167 | |
1fac34b9 ZJS |
168 | r = write_drop_in_format(arg_dest, dmname, 50, "job-timeout", |
169 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
170 | "[Unit]\n" | |
171 | "JobTimeoutSec=0"); /* the binary handles timeouts anyway */ | |
23bbb0de | 172 | if (r < 0) |
1fac34b9 | 173 | log_warning_errno(r, "Failed to write device timeout drop-in, ignoring: %m"); |
1af72119 | 174 | |
2aa2860b ZJS |
175 | if (device) { |
176 | char *ret; | |
177 | ||
b910cc72 | 178 | ret = path_join("/dev/mapper", id); |
2aa2860b ZJS |
179 | if (!ret) |
180 | return log_oom(); | |
1af72119 | 181 | |
01af8c01 | 182 | *device = ret; |
2aa2860b ZJS |
183 | } |
184 | ||
1af72119 | 185 | return 0; |
5b137503 YG |
186 | #else |
187 | return log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Partition is encrypted, but the project was compiled without libcryptsetup support"); | |
188 | #endif | |
1af72119 LP |
189 | } |
190 | ||
73b80ec2 LP |
191 | static int add_mount( |
192 | const char *id, | |
193 | const char *what, | |
194 | const char *where, | |
195 | const char *fstype, | |
cca1dfdd | 196 | bool rw, |
400c1e8f | 197 | bool growfs, |
59512f21 | 198 | const char *options, |
73b80ec2 LP |
199 | const char *description, |
200 | const char *post) { | |
201 | ||
9cdcf368 | 202 | _cleanup_free_ char *unit = NULL, *crypto_what = NULL, *p = NULL; |
1a14a53c | 203 | _cleanup_fclose_ FILE *f = NULL; |
e48fdd84 | 204 | int r; |
1a14a53c | 205 | |
98bad05e LP |
206 | /* Note that we don't apply specifier escaping on the input strings here, since we know they are not configured |
207 | * externally, but all originate from our own sources here, and hence we know they contain no % characters that | |
208 | * could potentially be understood as specifiers. */ | |
209 | ||
1af72119 LP |
210 | assert(id); |
211 | assert(what); | |
212 | assert(where); | |
1af72119 LP |
213 | assert(description); |
214 | ||
074cdb95 | 215 | log_debug("Adding %s: %s fstype=%s", where, what, fstype ?: "(any)"); |
1a14a53c | 216 | |
73b80ec2 | 217 | if (streq_ptr(fstype, "crypto_LUKS")) { |
01af8c01 | 218 | r = add_cryptsetup(id, what, rw, true, &crypto_what); |
1af72119 LP |
219 | if (r < 0) |
220 | return r; | |
221 | ||
222 | what = crypto_what; | |
223 | fstype = NULL; | |
224 | } | |
225 | ||
7410616c LP |
226 | r = unit_name_from_path(where, ".mount", &unit); |
227 | if (r < 0) | |
228 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1a14a53c | 229 | |
657ee2d8 | 230 | p = path_join(empty_to_root(arg_dest), unit); |
e48fdd84 LP |
231 | if (!p) |
232 | return log_oom(); | |
233 | ||
234 | f = fopen(p, "wxe"); | |
4a62c710 MS |
235 | if (!f) |
236 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
1a14a53c LP |
237 | |
238 | fprintf(f, | |
239 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
240 | "[Unit]\n" | |
c3834f9b LP |
241 | "Description=%s\n" |
242 | "Documentation=man:systemd-gpt-auto-generator(8)\n", | |
e48fdd84 LP |
243 | description); |
244 | ||
73b80ec2 LP |
245 | if (post) |
246 | fprintf(f, "Before=%s\n", post); | |
247 | ||
e48fdd84 LP |
248 | r = generator_write_fsck_deps(f, arg_dest, what, where, fstype); |
249 | if (r < 0) | |
250 | return r; | |
251 | ||
a7e88558 LP |
252 | r = generator_write_blockdev_dependency(f, what); |
253 | if (r < 0) | |
254 | return r; | |
255 | ||
e48fdd84 LP |
256 | fprintf(f, |
257 | "\n" | |
1a14a53c LP |
258 | "[Mount]\n" |
259 | "What=%s\n" | |
1af72119 LP |
260 | "Where=%s\n", |
261 | what, where); | |
262 | ||
73b80ec2 LP |
263 | if (fstype) |
264 | fprintf(f, "Type=%s\n", fstype); | |
265 | ||
59512f21 KS |
266 | if (options) |
267 | fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); | |
268 | else | |
269 | fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); | |
1a14a53c | 270 | |
dacd6cee LP |
271 | r = fflush_and_check(f); |
272 | if (r < 0) | |
273 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
1a14a53c | 274 | |
400c1e8f LP |
275 | if (growfs) { |
276 | r = generator_hook_up_growfs(arg_dest, where, post); | |
277 | if (r < 0) | |
278 | return r; | |
279 | } | |
280 | ||
281 | if (post) { | |
282 | r = generator_add_symlink(arg_dest, post, "requires", unit); | |
283 | if (r < 0) | |
284 | return r; | |
285 | } | |
286 | ||
1a14a53c LP |
287 | return 0; |
288 | } | |
289 | ||
e137880b | 290 | static int path_is_busy(const char *where) { |
59512f21 KS |
291 | int r; |
292 | ||
293 | /* already a mountpoint; generators run during reload */ | |
e1873695 | 294 | r = path_is_mount_point(where, NULL, AT_SYMLINK_FOLLOW); |
59512f21 KS |
295 | if (r > 0) |
296 | return false; | |
297 | ||
298 | /* the directory might not exist on a stateless system */ | |
299 | if (r == -ENOENT) | |
300 | return false; | |
301 | ||
302 | if (r < 0) | |
e137880b | 303 | return log_warning_errno(r, "Cannot check if \"%s\" is a mount point: %m", where); |
59512f21 KS |
304 | |
305 | /* not a mountpoint but it contains files */ | |
e137880b ZJS |
306 | r = dir_is_empty(where); |
307 | if (r < 0) | |
308 | return log_warning_errno(r, "Cannot check if \"%s\" is empty: %m", where); | |
309 | if (r > 0) | |
310 | return false; | |
59512f21 | 311 | |
e137880b ZJS |
312 | log_debug("\"%s\" already populated, ignoring.", where); |
313 | return true; | |
59512f21 KS |
314 | } |
315 | ||
72e18a98 LP |
316 | static int add_partition_mount( |
317 | DissectedPartition *p, | |
61331eab | 318 | const char *id, |
61331eab | 319 | const char *where, |
72e18a98 | 320 | const char *description) { |
61331eab | 321 | |
e137880b | 322 | int r; |
72e18a98 | 323 | assert(p); |
61331eab | 324 | |
e137880b ZJS |
325 | r = path_is_busy(where); |
326 | if (r != 0) | |
327 | return r < 0 ? r : 0; | |
61331eab | 328 | |
61331eab LP |
329 | return add_mount( |
330 | id, | |
72e18a98 | 331 | p->node, |
61331eab | 332 | where, |
72e18a98 LP |
333 | p->fstype, |
334 | p->rw, | |
400c1e8f | 335 | p->growfs, |
59512f21 | 336 | NULL, |
61331eab | 337 | description, |
72e18a98 | 338 | SPECIAL_LOCAL_FS_TARGET); |
61331eab LP |
339 | } |
340 | ||
8859b8f7 HOB |
341 | static int add_swap(DissectedPartition *p) { |
342 | const char *what; | |
343 | _cleanup_free_ char *name = NULL, *unit = NULL, *crypto_what = NULL; | |
59512f21 KS |
344 | _cleanup_fclose_ FILE *f = NULL; |
345 | int r; | |
346 | ||
8859b8f7 HOB |
347 | assert(p); |
348 | assert(p->node); | |
59512f21 | 349 | |
fc5bc384 FB |
350 | /* Disable the swap auto logic if at least one swap is defined in /etc/fstab, see #6192. */ |
351 | r = fstab_has_fstype("swap"); | |
352 | if (r < 0) | |
353 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
1a680ae3 | 354 | if (r > 0) { |
fc5bc384 FB |
355 | log_debug("swap specified in fstab, ignoring."); |
356 | return 0; | |
357 | } | |
358 | ||
8859b8f7 HOB |
359 | if (streq_ptr(p->fstype, "crypto_LUKS")) { |
360 | r = add_cryptsetup("swap", p->node, true, true, &crypto_what); | |
361 | if (r < 0) | |
362 | return r; | |
363 | what = crypto_what; | |
364 | } else | |
365 | what = p->node; | |
366 | ||
367 | log_debug("Adding swap: %s", what); | |
59512f21 | 368 | |
8859b8f7 | 369 | r = unit_name_from_path(what, ".swap", &name); |
59512f21 KS |
370 | if (r < 0) |
371 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
372 | ||
657ee2d8 | 373 | unit = path_join(empty_to_root(arg_dest), name); |
59512f21 KS |
374 | if (!unit) |
375 | return log_oom(); | |
376 | ||
377 | f = fopen(unit, "wxe"); | |
378 | if (!f) | |
379 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
380 | ||
381 | fprintf(f, | |
382 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
383 | "[Unit]\n" | |
384 | "Description=Swap Partition\n" | |
a7e88558 LP |
385 | "Documentation=man:systemd-gpt-auto-generator(8)\n"); |
386 | ||
8859b8f7 | 387 | r = generator_write_blockdev_dependency(f, what); |
a7e88558 LP |
388 | if (r < 0) |
389 | return r; | |
390 | ||
391 | fprintf(f, | |
392 | "\n" | |
59512f21 KS |
393 | "[Swap]\n" |
394 | "What=%s\n", | |
8859b8f7 | 395 | what); |
59512f21 | 396 | |
dacd6cee LP |
397 | r = fflush_and_check(f); |
398 | if (r < 0) | |
399 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
59512f21 | 400 | |
9cdcf368 | 401 | return generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, "wants", name); |
59512f21 KS |
402 | } |
403 | ||
7a1494aa TG |
404 | static int add_automount( |
405 | const char *id, | |
406 | const char *what, | |
407 | const char *where, | |
408 | const char *fstype, | |
409 | bool rw, | |
400c1e8f | 410 | bool growfs, |
7a1494aa TG |
411 | const char *options, |
412 | const char *description, | |
413 | usec_t timeout) { | |
414 | ||
9cdcf368 | 415 | _cleanup_free_ char *unit = NULL; |
7a1494aa | 416 | _cleanup_fclose_ FILE *f = NULL; |
2aa2860b | 417 | const char *opt = "noauto", *p; |
7a1494aa TG |
418 | int r; |
419 | ||
420 | assert(id); | |
421 | assert(where); | |
422 | assert(description); | |
423 | ||
424 | if (options) | |
2aa2860b | 425 | opt = strjoina(options, ",", opt); |
7a1494aa TG |
426 | |
427 | r = add_mount(id, | |
428 | what, | |
429 | where, | |
430 | fstype, | |
431 | rw, | |
400c1e8f | 432 | growfs, |
7a1494aa TG |
433 | opt, |
434 | description, | |
435 | NULL); | |
436 | if (r < 0) | |
437 | return r; | |
438 | ||
439 | r = unit_name_from_path(where, ".automount", &unit); | |
440 | if (r < 0) | |
441 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
442 | ||
270384b2 | 443 | p = prefix_roota(arg_dest, unit); |
7a1494aa TG |
444 | f = fopen(p, "wxe"); |
445 | if (!f) | |
446 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
447 | ||
448 | fprintf(f, | |
449 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
450 | "[Unit]\n" | |
451 | "Description=%s\n" | |
452 | "Documentation=man:systemd-gpt-auto-generator(8)\n" | |
453 | "[Automount]\n" | |
454 | "Where=%s\n" | |
70887c5f | 455 | "TimeoutIdleSec="USEC_FMT"\n", |
7a1494aa TG |
456 | description, |
457 | where, | |
70887c5f | 458 | timeout / USEC_PER_SEC); |
7a1494aa TG |
459 | |
460 | r = fflush_and_check(f); | |
461 | if (r < 0) | |
462 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
463 | ||
9cdcf368 | 464 | return generator_add_symlink(arg_dest, SPECIAL_LOCAL_FS_TARGET, "wants", unit); |
7a1494aa TG |
465 | } |
466 | ||
4f084066 LP |
467 | static const char *esp_or_xbootldr_options(const DissectedPartition *p) { |
468 | assert(p); | |
469 | ||
470 | /* if we probed vfat or have no idea about the file system then assume these file systems are vfat | |
471 | * and thus understand "umask=0077". If we detected something else then don't specify any options and | |
472 | * use kernel defaults. */ | |
473 | ||
474 | if (!p->fstype || streq(p->fstype, "vfat")) | |
475 | return "umask=0077"; | |
476 | ||
477 | return NULL; | |
478 | } | |
479 | ||
9f1cb0c1 LP |
480 | static int add_xbootldr(DissectedPartition *p) { |
481 | int r; | |
482 | ||
483 | assert(p); | |
484 | ||
485 | if (in_initrd()) { | |
486 | log_debug("In initrd, ignoring the XBOOTLDR partition."); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | r = fstab_is_mount_point("/boot"); | |
491 | if (r < 0) | |
492 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
493 | if (r > 0) { | |
494 | log_debug("/boot specified in fstab, ignoring XBOOTLDR partition."); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | r = path_is_busy("/boot"); | |
499 | if (r < 0) | |
500 | return r; | |
501 | if (r > 0) | |
502 | return 0; | |
503 | ||
504 | return add_automount("boot", | |
505 | p->node, | |
506 | "/boot", | |
507 | p->fstype, | |
400c1e8f LP |
508 | /* rw= */ true, |
509 | /* growfs= */ false, | |
4f084066 | 510 | esp_or_xbootldr_options(p), |
9f1cb0c1 LP |
511 | "Boot Loader Partition", |
512 | 120 * USEC_PER_SEC); | |
513 | } | |
514 | ||
515 | #if ENABLE_EFI | |
516 | static int add_esp(DissectedPartition *p, bool has_xbootldr) { | |
517 | const char *esp_path = NULL, *id = NULL; | |
59512f21 KS |
518 | int r; |
519 | ||
72e18a98 | 520 | assert(p); |
59512f21 | 521 | |
59512f21 | 522 | if (in_initrd()) { |
b52a109a | 523 | log_debug("In initrd, ignoring the ESP."); |
59512f21 KS |
524 | return 0; |
525 | } | |
526 | ||
9f1cb0c1 LP |
527 | /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice, but |
528 | * only if there's no explicit XBOOTLDR partition around. */ | |
529 | if (access("/efi", F_OK) < 0) { | |
530 | if (errno != ENOENT) | |
531 | return log_error_errno(errno, "Failed to determine whether /efi exists: %m"); | |
532 | ||
533 | /* Use /boot as fallback, but only if there's no XBOOTLDR partition */ | |
534 | if (!has_xbootldr) { | |
535 | esp_path = "/boot"; | |
536 | id = "boot"; | |
537 | } | |
538 | } | |
539 | if (!esp_path) | |
540 | esp_path = "/efi"; | |
541 | if (!id) | |
542 | id = "efi"; | |
59512f21 | 543 | |
0b6b6787 | 544 | /* We create an .automount which is not overridden by the .mount from the fstab generator. */ |
9f1cb0c1 | 545 | r = fstab_is_mount_point(esp_path); |
b9088048 FB |
546 | if (r < 0) |
547 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
39b6a511 | 548 | if (r > 0) { |
9f1cb0c1 | 549 | log_debug("%s specified in fstab, ignoring.", esp_path); |
59512f21 KS |
550 | return 0; |
551 | } | |
552 | ||
9f1cb0c1 LP |
553 | r = path_is_busy(esp_path); |
554 | if (r < 0) | |
555 | return r; | |
556 | if (r > 0) | |
557 | return 0; | |
59512f21 | 558 | |
7ba25ab5 | 559 | if (is_efi_boot()) { |
72e18a98 | 560 | sd_id128_t loader_uuid; |
59512f21 | 561 | |
7ba25ab5 | 562 | /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */ |
59512f21 | 563 | |
7ba25ab5 LP |
564 | r = efi_loader_get_device_part_uuid(&loader_uuid); |
565 | if (r == -ENOENT) { | |
566 | log_debug("EFI loader partition unknown."); | |
567 | return 0; | |
568 | } | |
e28973ee ZJS |
569 | if (r < 0) |
570 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
7ba25ab5 | 571 | |
72e18a98 | 572 | if (!sd_id128_equal(p->uuid, loader_uuid)) { |
9f1cb0c1 | 573 | log_debug("Partition for %s does not appear to be the partition we are booted from.", p->node); |
7ba25ab5 LP |
574 | return 0; |
575 | } | |
576 | } else | |
577 | log_debug("Not an EFI boot, skipping ESP check."); | |
578 | ||
9f1cb0c1 | 579 | return add_automount(id, |
72e18a98 | 580 | p->node, |
9f1cb0c1 | 581 | esp_path, |
72e18a98 | 582 | p->fstype, |
400c1e8f LP |
583 | /* rw= */ true, |
584 | /* growfs= */ false, | |
4f084066 | 585 | esp_or_xbootldr_options(p), |
72e18a98 LP |
586 | "EFI System Partition Automount", |
587 | 120 * USEC_PER_SEC); | |
7a1494aa | 588 | } |
59512f21 | 589 | #else |
9f1cb0c1 | 590 | static int add_esp(DissectedPartition *p, bool has_xbootldr) { |
59512f21 | 591 | return 0; |
59512f21 | 592 | } |
7a1494aa | 593 | #endif |
59512f21 | 594 | |
fd89051e LP |
595 | static int add_root_rw(DissectedPartition *p) { |
596 | const char *path; | |
597 | int r; | |
598 | ||
599 | assert(p); | |
600 | ||
601 | if (in_initrd()) { | |
602 | log_debug("In initrd, not generating drop-in for systemd-remount-fs.service."); | |
603 | return 0; | |
604 | } | |
605 | ||
606 | if (arg_root_rw >= 0) { | |
607 | log_debug("Parameter ro/rw specified on kernel command line, not generating drop-in for systemd-remount-fs.service."); | |
608 | return 0; | |
609 | } | |
610 | ||
611 | if (!p->rw) { | |
612 | log_debug("Root partition marked read-only in GPT partition table, not generating drop-in for systemd-remount-fs.service."); | |
613 | return 0; | |
614 | } | |
615 | ||
9b69569d ZJS |
616 | (void) generator_enable_remount_fs_service(arg_dest); |
617 | ||
fd89051e | 618 | path = strjoina(arg_dest, "/systemd-remount-fs.service.d/50-remount-rw.conf"); |
fd89051e LP |
619 | |
620 | r = write_string_file(path, | |
621 | "# Automatically generated by systemd-gpt-generator\n\n" | |
fd89051e LP |
622 | "[Service]\n" |
623 | "Environment=SYSTEMD_REMOUNT_ROOT_RW=1\n", | |
e82e549f | 624 | WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_NOFOLLOW|WRITE_STRING_FILE_MKDIR_0755); |
fd89051e LP |
625 | if (r < 0) |
626 | return log_error_errno(r, "Failed to write drop-in file %s: %m", path); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
9fe6f5cc ZJS |
631 | #if ENABLE_EFI |
632 | static int add_root_cryptsetup(void) { | |
1a14a53c | 633 | |
9fe6f5cc ZJS |
634 | /* If a device /dev/gpt-auto-root-luks appears, then make it pull in systemd-cryptsetup-root.service, which |
635 | * sets it up, and causes /dev/gpt-auto-root to appear which is all we are looking for. */ | |
1a14a53c | 636 | |
9fe6f5cc ZJS |
637 | return add_cryptsetup("root", "/dev/gpt-auto-root-luks", true, false, NULL); |
638 | } | |
639 | #endif | |
d2a62382 | 640 | |
9fe6f5cc ZJS |
641 | static int add_root_mount(void) { |
642 | #if ENABLE_EFI | |
643 | int r; | |
1a14a53c | 644 | |
9fe6f5cc | 645 | if (!is_efi_boot()) { |
387f6955 | 646 | log_debug("Not an EFI boot, not creating root mount."); |
8090b41e | 647 | return 0; |
fa041593 | 648 | } |
61331eab | 649 | |
9fe6f5cc ZJS |
650 | r = efi_loader_get_device_part_uuid(NULL); |
651 | if (r == -ENOENT) { | |
b50a3a15 ZJS |
652 | log_notice("EFI loader partition unknown, exiting.\n" |
653 | "(The boot loader did not set EFI variable LoaderDevicePartUUID.)"); | |
8090b41e | 654 | return 0; |
9fe6f5cc ZJS |
655 | } else if (r < 0) |
656 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
61331eab | 657 | |
9fe6f5cc ZJS |
658 | /* OK, we have an ESP partition, this is fantastic, so let's |
659 | * wait for a root device to show up. A udev rule will create | |
660 | * the link for us under the right name. */ | |
61331eab | 661 | |
9fe6f5cc ZJS |
662 | if (in_initrd()) { |
663 | r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root"); | |
664 | if (r < 0) | |
665 | return 0; | |
61331eab | 666 | |
9fe6f5cc ZJS |
667 | r = add_root_cryptsetup(); |
668 | if (r < 0) | |
669 | return r; | |
61331eab LP |
670 | } |
671 | ||
9fe6f5cc ZJS |
672 | /* Note that we do not need to enable systemd-remount-fs.service here. If |
673 | * /etc/fstab exists, systemd-fstab-generator will pull it in for us. */ | |
61331eab | 674 | |
9fe6f5cc ZJS |
675 | return add_mount( |
676 | "root", | |
677 | "/dev/gpt-auto-root", | |
678 | in_initrd() ? "/sysroot" : "/", | |
679 | NULL, | |
400c1e8f LP |
680 | /* rw= */ arg_root_rw > 0, |
681 | /* growfs= */ false, | |
9fe6f5cc ZJS |
682 | NULL, |
683 | "Root Partition", | |
684 | in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET); | |
685 | #else | |
686 | return 0; | |
687 | #endif | |
72e18a98 | 688 | } |
cb971249 | 689 | |
72e18a98 | 690 | static int enumerate_partitions(dev_t devnum) { |
72e18a98 LP |
691 | _cleanup_close_ int fd = -1; |
692 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
693 | int r, k; | |
61331eab | 694 | |
3d92aa45 | 695 | r = open_parent_block_device(devnum, &fd); |
72e18a98 LP |
696 | if (r <= 0) |
697 | return r; | |
61331eab | 698 | |
d04faa4e LP |
699 | r = dissect_image( |
700 | fd, | |
701 | NULL, NULL, | |
a3642997 | 702 | /* diskseq= */ 0, |
75dc190d | 703 | UINT64_MAX, |
4a62257d | 704 | USEC_INFINITY, |
d04faa4e | 705 | DISSECT_IMAGE_GPT_ONLY| |
d04faa4e LP |
706 | DISSECT_IMAGE_USR_NO_ROOT, |
707 | &m); | |
72e18a98 LP |
708 | if (r == -ENOPKG) { |
709 | log_debug_errno(r, "No suitable partition table found, ignoring."); | |
710 | return 0; | |
61331eab | 711 | } |
23bbb0de | 712 | if (r < 0) |
72e18a98 | 713 | return log_error_errno(r, "Failed to dissect: %m"); |
0238d4c6 | 714 | |
72e18a98 | 715 | if (m->partitions[PARTITION_SWAP].found) { |
8859b8f7 | 716 | k = add_swap(m->partitions + PARTITION_SWAP); |
72e18a98 LP |
717 | if (k < 0) |
718 | r = k; | |
1a14a53c LP |
719 | } |
720 | ||
9f1cb0c1 LP |
721 | if (m->partitions[PARTITION_XBOOTLDR].found) { |
722 | k = add_xbootldr(m->partitions + PARTITION_XBOOTLDR); | |
723 | if (k < 0) | |
724 | r = k; | |
725 | } | |
726 | ||
72e18a98 | 727 | if (m->partitions[PARTITION_ESP].found) { |
9f1cb0c1 | 728 | k = add_esp(m->partitions + PARTITION_ESP, m->partitions[PARTITION_XBOOTLDR].found); |
59512f21 KS |
729 | if (k < 0) |
730 | r = k; | |
731 | } | |
732 | ||
72e18a98 LP |
733 | if (m->partitions[PARTITION_HOME].found) { |
734 | k = add_partition_mount(m->partitions + PARTITION_HOME, "home", "/home", "Home Partition"); | |
73b80ec2 LP |
735 | if (k < 0) |
736 | r = k; | |
737 | } | |
e48fdd84 | 738 | |
72e18a98 LP |
739 | if (m->partitions[PARTITION_SRV].found) { |
740 | k = add_partition_mount(m->partitions + PARTITION_SRV, "srv", "/srv", "Server Data Partition"); | |
73b80ec2 LP |
741 | if (k < 0) |
742 | r = k; | |
743 | } | |
1a14a53c | 744 | |
d4dffb85 LP |
745 | if (m->partitions[PARTITION_VAR].found) { |
746 | k = add_partition_mount(m->partitions + PARTITION_VAR, "var", "/var", "Variable Data Partition"); | |
747 | if (k < 0) | |
748 | r = k; | |
749 | } | |
750 | ||
751 | if (m->partitions[PARTITION_TMP].found) { | |
752 | k = add_partition_mount(m->partitions + PARTITION_TMP, "var-tmp", "/var/tmp", "Temporary Data Partition"); | |
753 | if (k < 0) | |
754 | r = k; | |
755 | } | |
756 | ||
fd89051e LP |
757 | if (m->partitions[PARTITION_ROOT].found) { |
758 | k = add_root_rw(m->partitions + PARTITION_ROOT); | |
759 | if (k < 0) | |
760 | r = k; | |
761 | } | |
762 | ||
1a14a53c LP |
763 | return r; |
764 | } | |
765 | ||
9fe6f5cc | 766 | static int add_mounts(void) { |
b00651cf | 767 | _cleanup_free_ char *p = NULL; |
9fe6f5cc | 768 | int r; |
b00651cf | 769 | dev_t devno; |
9fe6f5cc | 770 | |
b00651cf KK |
771 | /* If the root mount has been replaced by some form of volatile file system (overlayfs), the |
772 | * original root block device node is symlinked in /run/systemd/volatile-root. Let's read that | |
773 | * here. */ | |
774 | r = readlink_malloc("/run/systemd/volatile-root", &p); | |
775 | if (r == -ENOENT) { /* volatile-root not found */ | |
776 | r = get_block_device_harder("/", &devno); | |
67f0ac8c | 777 | if (r == -EUCLEAN) |
b00651cf | 778 | return btrfs_log_dev_root(LOG_ERR, r, "root file system"); |
9fe6f5cc | 779 | if (r < 0) |
b00651cf | 780 | return log_error_errno(r, "Failed to determine block device of root file system: %m"); |
d5cb053c | 781 | if (r == 0) { /* Not backed by a single block device. (Could be NFS or so, or could be multi-device RAID or so) */ |
b00651cf KK |
782 | r = get_block_device_harder("/usr", &devno); |
783 | if (r == -EUCLEAN) | |
784 | return btrfs_log_dev_root(LOG_ERR, r, "/usr"); | |
9fe6f5cc | 785 | if (r < 0) |
d5cb053c LP |
786 | return log_error_errno(r, "Failed to determine block device of /usr/ file system: %m"); |
787 | if (r == 0) { /* /usr/ not backed by single block device, either. */ | |
788 | log_debug("Neither root nor /usr/ file system are on a (single) block device."); | |
789 | return 0; | |
790 | } | |
9fe6f5cc | 791 | } |
b00651cf KK |
792 | } else if (r < 0) |
793 | return log_error_errno(r, "Failed to read symlink /run/systemd/volatile-root: %m"); | |
794 | else { | |
795 | mode_t m; | |
796 | r = device_path_parse_major_minor(p, &m, &devno); | |
797 | if (r < 0) | |
798 | return log_error_errno(r, "Failed to parse major/minor device node: %m"); | |
799 | if (!S_ISBLK(m)) | |
800 | return log_error_errno(SYNTHETIC_ERRNO(ENOTBLK), "Volatile root device is of wrong type."); | |
9fe6f5cc ZJS |
801 | } |
802 | ||
803 | return enumerate_partitions(devno); | |
804 | } | |
805 | ||
96287a49 | 806 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
73b80ec2 | 807 | int r; |
1a14a53c | 808 | |
73b80ec2 | 809 | assert(key); |
1a14a53c | 810 | |
8a9c44ed LP |
811 | if (proc_cmdline_key_streq(key, "systemd.gpt_auto") || |
812 | proc_cmdline_key_streq(key, "rd.systemd.gpt_auto")) { | |
1a14a53c | 813 | |
1d84ad94 | 814 | r = value ? parse_boolean(value) : 1; |
73b80ec2 | 815 | if (r < 0) |
0a1b9449 | 816 | log_warning_errno(r, "Failed to parse gpt-auto switch \"%s\", ignoring: %m", value); |
8086ffac ZJS |
817 | else |
818 | arg_enabled = r; | |
1a14a53c | 819 | |
8a9c44ed | 820 | } else if (proc_cmdline_key_streq(key, "root")) { |
1d84ad94 LP |
821 | |
822 | if (proc_cmdline_value_missing(key, value)) | |
823 | return 0; | |
73b80ec2 LP |
824 | |
825 | /* Disable root disk logic if there's a root= value | |
826 | * specified (unless it happens to be "gpt-auto") */ | |
827 | ||
074cdb95 ZJS |
828 | if (!streq(value, "gpt-auto")) { |
829 | arg_root_enabled = false; | |
830 | log_debug("Disabling root partition auto-detection, root= is defined."); | |
831 | } | |
73b80ec2 | 832 | |
8a9c44ed | 833 | } else if (proc_cmdline_key_streq(key, "roothash")) { |
2f3dfc6f LP |
834 | |
835 | if (proc_cmdline_value_missing(key, value)) | |
836 | return 0; | |
837 | ||
838 | /* Disable root disk logic if there's roothash= defined (i.e. verity enabled) */ | |
839 | ||
840 | arg_root_enabled = false; | |
841 | ||
8a9c44ed | 842 | } else if (proc_cmdline_key_streq(key, "rw") && !value) |
73b80ec2 | 843 | arg_root_rw = true; |
8a9c44ed | 844 | else if (proc_cmdline_key_streq(key, "ro") && !value) |
73b80ec2 | 845 | arg_root_rw = false; |
73b80ec2 LP |
846 | |
847 | return 0; | |
848 | } | |
849 | ||
ec6e9597 | 850 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
8f50e86a | 851 | int r, k; |
73b80ec2 | 852 | |
ec6e9597 | 853 | assert_se(arg_dest = dest_late); |
73b80ec2 | 854 | |
75f86906 | 855 | if (detect_container() > 0) { |
73b80ec2 | 856 | log_debug("In a container, exiting."); |
ec6e9597 | 857 | return 0; |
1a14a53c | 858 | } |
3db604b9 | 859 | |
1d84ad94 | 860 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 861 | if (r < 0) |
da927ba9 | 862 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
1a14a53c | 863 | |
73b80ec2 LP |
864 | if (!arg_enabled) { |
865 | log_debug("Disabled, exiting."); | |
ec6e9597 | 866 | return 0; |
73b80ec2 LP |
867 | } |
868 | ||
869 | if (arg_root_enabled) | |
870 | r = add_root_mount(); | |
871 | ||
872 | if (!in_initrd()) { | |
73b80ec2 | 873 | k = add_mounts(); |
ec6e9597 | 874 | if (r >= 0) |
73b80ec2 LP |
875 | r = k; |
876 | } | |
877 | ||
ec6e9597 | 878 | return r; |
1a14a53c | 879 | } |
ec6e9597 ZJS |
880 | |
881 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |