]>
Commit | Line | Data |
---|---|---|
1a14a53c LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
23 | #include <stdlib.h> | |
1a14a53c | 24 | #include <sys/statfs.h> |
96115cdf | 25 | #include <blkid/blkid.h> |
1a14a53c | 26 | |
1af72119 LP |
27 | #include "sd-id128.h" |
28 | #include "libudev.h" | |
1a14a53c LP |
29 | #include "path-util.h" |
30 | #include "util.h" | |
31 | #include "mkdir.h" | |
32 | #include "missing.h" | |
1ca208fb | 33 | #include "udev-util.h" |
1a14a53c LP |
34 | #include "special.h" |
35 | #include "unit-name.h" | |
9a5cb137 | 36 | #include "virt.h" |
e48fdd84 LP |
37 | #include "generator.h" |
38 | #include "gpt.h" | |
1af72119 | 39 | #include "fileio.h" |
73b80ec2 | 40 | #include "efivars.h" |
1b9e5b12 | 41 | #include "blkid-util.h" |
f9ac1544 | 42 | #include "btrfs-util.h" |
1a14a53c | 43 | |
1a14a53c | 44 | static const char *arg_dest = "/tmp"; |
73b80ec2 LP |
45 | static bool arg_enabled = true; |
46 | static bool arg_root_enabled = true; | |
47 | static bool arg_root_rw = false; | |
1a14a53c | 48 | |
cca1dfdd | 49 | static int add_cryptsetup(const char *id, const char *what, bool rw, char **device) { |
1af72119 LP |
50 | _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL, *to = NULL; |
51 | _cleanup_fclose_ FILE *f = NULL; | |
52 | char *from, *ret; | |
53 | int r; | |
54 | ||
55 | assert(id); | |
56 | assert(what); | |
57 | assert(device); | |
58 | ||
7410616c LP |
59 | r = unit_name_from_path(what, ".device", &d); |
60 | if (r < 0) | |
61 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
62 | |
63 | e = unit_name_escape(id); | |
64 | if (!e) | |
65 | return log_oom(); | |
66 | ||
7410616c LP |
67 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
68 | if (r < 0) | |
69 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
70 | |
71 | p = strjoin(arg_dest, "/", n, NULL); | |
821b2e79 | 72 | if (!p) |
1af72119 LP |
73 | return log_oom(); |
74 | ||
75 | f = fopen(p, "wxe"); | |
4a62c710 MS |
76 | if (!f) |
77 | return log_error_errno(errno, "Failed to create unit file %s: %m", p); | |
1af72119 LP |
78 | |
79 | fprintf(f, | |
80 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
81 | "[Unit]\n" | |
82 | "Description=Cryptography Setup for %%I\n" | |
c3834f9b | 83 | "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n" |
1af72119 LP |
84 | "DefaultDependencies=no\n" |
85 | "Conflicts=umount.target\n" | |
86 | "BindsTo=dev-mapper-%%i.device %s\n" | |
87 | "Before=umount.target cryptsetup.target\n" | |
88 | "After=%s\n" | |
89 | "IgnoreOnIsolate=true\n" | |
1af72119 LP |
90 | "[Service]\n" |
91 | "Type=oneshot\n" | |
92 | "RemainAfterExit=yes\n" | |
93 | "TimeoutSec=0\n" /* the binary handles timeouts anyway */ | |
cca1dfdd | 94 | "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n" |
1af72119 LP |
95 | "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", |
96 | d, d, | |
cca1dfdd | 97 | id, what, rw ? "" : "read-only", |
1af72119 LP |
98 | id); |
99 | ||
dacd6cee LP |
100 | r = fflush_and_check(f); |
101 | if (r < 0) | |
102 | return log_error_errno(r, "Failed to write file %s: %m", p); | |
1af72119 | 103 | |
63c372cb | 104 | from = strjoina("../", n); |
1af72119 LP |
105 | |
106 | to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); | |
107 | if (!to) | |
108 | return log_oom(); | |
109 | ||
110 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
111 | if (symlink(from, to) < 0) |
112 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
113 | |
114 | free(to); | |
115 | to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL); | |
116 | if (!to) | |
117 | return log_oom(); | |
118 | ||
119 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
120 | if (symlink(from, to) < 0) |
121 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
122 | |
123 | free(to); | |
124 | to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); | |
125 | if (!to) | |
126 | return log_oom(); | |
127 | ||
128 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
129 | if (symlink(from, to) < 0) |
130 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
131 | |
132 | free(p); | |
133 | p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL); | |
134 | if (!p) | |
135 | return log_oom(); | |
136 | ||
137 | mkdir_parents_label(p, 0755); | |
138 | r = write_string_file(p, | |
139 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
140 | "[Unit]\n" | |
4c1fc3e4 DM |
141 | "JobTimeoutSec=0\n", |
142 | WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */ | |
23bbb0de MS |
143 | if (r < 0) |
144 | return log_error_errno(r, "Failed to write device drop-in: %m"); | |
1af72119 LP |
145 | |
146 | ret = strappend("/dev/mapper/", id); | |
147 | if (!ret) | |
148 | return log_oom(); | |
149 | ||
150 | *device = ret; | |
151 | return 0; | |
152 | } | |
153 | ||
73b80ec2 LP |
154 | static int add_mount( |
155 | const char *id, | |
156 | const char *what, | |
157 | const char *where, | |
158 | const char *fstype, | |
cca1dfdd | 159 | bool rw, |
59512f21 | 160 | const char *options, |
73b80ec2 LP |
161 | const char *description, |
162 | const char *post) { | |
163 | ||
1af72119 | 164 | _cleanup_free_ char *unit = NULL, *lnk = NULL, *crypto_what = NULL, *p = NULL; |
1a14a53c | 165 | _cleanup_fclose_ FILE *f = NULL; |
e48fdd84 | 166 | int r; |
1a14a53c | 167 | |
1af72119 LP |
168 | assert(id); |
169 | assert(what); | |
170 | assert(where); | |
1af72119 LP |
171 | assert(description); |
172 | ||
73b80ec2 | 173 | log_debug("Adding %s: %s %s", where, what, strna(fstype)); |
1a14a53c | 174 | |
73b80ec2 | 175 | if (streq_ptr(fstype, "crypto_LUKS")) { |
1af72119 | 176 | |
cca1dfdd | 177 | r = add_cryptsetup(id, what, rw, &crypto_what); |
1af72119 LP |
178 | if (r < 0) |
179 | return r; | |
180 | ||
181 | what = crypto_what; | |
182 | fstype = NULL; | |
183 | } | |
184 | ||
7410616c LP |
185 | r = unit_name_from_path(where, ".mount", &unit); |
186 | if (r < 0) | |
187 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1a14a53c | 188 | |
e48fdd84 LP |
189 | p = strjoin(arg_dest, "/", unit, NULL); |
190 | if (!p) | |
191 | return log_oom(); | |
192 | ||
193 | f = fopen(p, "wxe"); | |
4a62c710 MS |
194 | if (!f) |
195 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
1a14a53c LP |
196 | |
197 | fprintf(f, | |
198 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
199 | "[Unit]\n" | |
c3834f9b LP |
200 | "Description=%s\n" |
201 | "Documentation=man:systemd-gpt-auto-generator(8)\n", | |
e48fdd84 LP |
202 | description); |
203 | ||
73b80ec2 LP |
204 | if (post) |
205 | fprintf(f, "Before=%s\n", post); | |
206 | ||
e48fdd84 LP |
207 | r = generator_write_fsck_deps(f, arg_dest, what, where, fstype); |
208 | if (r < 0) | |
209 | return r; | |
210 | ||
211 | fprintf(f, | |
212 | "\n" | |
1a14a53c LP |
213 | "[Mount]\n" |
214 | "What=%s\n" | |
1af72119 LP |
215 | "Where=%s\n", |
216 | what, where); | |
217 | ||
73b80ec2 LP |
218 | if (fstype) |
219 | fprintf(f, "Type=%s\n", fstype); | |
220 | ||
59512f21 KS |
221 | if (options) |
222 | fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); | |
223 | else | |
224 | fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); | |
1a14a53c | 225 | |
dacd6cee LP |
226 | r = fflush_and_check(f); |
227 | if (r < 0) | |
228 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
1a14a53c | 229 | |
73b80ec2 LP |
230 | if (post) { |
231 | lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL); | |
232 | if (!lnk) | |
233 | return log_oom(); | |
1a14a53c | 234 | |
73b80ec2 | 235 | mkdir_parents_label(lnk, 0755); |
4a62c710 MS |
236 | if (symlink(p, lnk) < 0) |
237 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
1a14a53c LP |
238 | } |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
59512f21 KS |
243 | static bool path_is_busy(const char *where) { |
244 | int r; | |
245 | ||
246 | /* already a mountpoint; generators run during reload */ | |
247 | r = path_is_mount_point(where, AT_SYMLINK_FOLLOW); | |
248 | if (r > 0) | |
249 | return false; | |
250 | ||
251 | /* the directory might not exist on a stateless system */ | |
252 | if (r == -ENOENT) | |
253 | return false; | |
254 | ||
255 | if (r < 0) | |
256 | return true; | |
257 | ||
258 | /* not a mountpoint but it contains files */ | |
259 | if (dir_is_empty(where) <= 0) | |
260 | return true; | |
261 | ||
262 | return false; | |
263 | } | |
264 | ||
61331eab LP |
265 | static int probe_and_add_mount( |
266 | const char *id, | |
267 | const char *what, | |
268 | const char *where, | |
cca1dfdd | 269 | bool rw, |
61331eab LP |
270 | const char *description, |
271 | const char *post) { | |
272 | ||
273 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
a0b1209c | 274 | const char *fstype = NULL; |
61331eab LP |
275 | int r; |
276 | ||
277 | assert(id); | |
278 | assert(what); | |
279 | assert(where); | |
280 | assert(description); | |
281 | ||
59512f21 | 282 | if (path_is_busy(where)) { |
61331eab LP |
283 | log_debug("%s already populated, ignoring.", where); |
284 | return 0; | |
285 | } | |
286 | ||
287 | /* Let's check the partition type here, so that we know | |
288 | * whether to do LUKS magic. */ | |
289 | ||
290 | errno = 0; | |
291 | b = blkid_new_probe_from_filename(what); | |
292 | if (!b) { | |
293 | if (errno == 0) | |
294 | return log_oom(); | |
56f64d95 | 295 | log_error_errno(errno, "Failed to allocate prober: %m"); |
61331eab LP |
296 | return -errno; |
297 | } | |
298 | ||
299 | blkid_probe_enable_superblocks(b, 1); | |
300 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
301 | ||
302 | errno = 0; | |
303 | r = blkid_do_safeprobe(b); | |
304 | if (r == -2 || r == 1) /* no result or uncertain */ | |
305 | return 0; | |
a0b1209c ZJS |
306 | else if (r != 0) |
307 | return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); | |
61331eab | 308 | |
a0b1209c ZJS |
309 | /* add_mount is OK with fstype being NULL. */ |
310 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
61331eab LP |
311 | |
312 | return add_mount( | |
313 | id, | |
314 | what, | |
315 | where, | |
316 | fstype, | |
cca1dfdd | 317 | rw, |
59512f21 | 318 | NULL, |
61331eab LP |
319 | description, |
320 | post); | |
321 | } | |
322 | ||
59512f21 KS |
323 | static int add_swap(const char *path) { |
324 | _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL; | |
325 | _cleanup_fclose_ FILE *f = NULL; | |
326 | int r; | |
327 | ||
328 | assert(path); | |
329 | ||
330 | log_debug("Adding swap: %s", path); | |
331 | ||
332 | r = unit_name_from_path(path, ".swap", &name); | |
333 | if (r < 0) | |
334 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
335 | ||
336 | unit = strjoin(arg_dest, "/", name, NULL); | |
337 | if (!unit) | |
338 | return log_oom(); | |
339 | ||
340 | f = fopen(unit, "wxe"); | |
341 | if (!f) | |
342 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
343 | ||
344 | fprintf(f, | |
345 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
346 | "[Unit]\n" | |
347 | "Description=Swap Partition\n" | |
348 | "Documentation=man:systemd-gpt-auto-generator(8)\n\n" | |
349 | "[Swap]\n" | |
350 | "What=%s\n", | |
351 | path); | |
352 | ||
dacd6cee LP |
353 | r = fflush_and_check(f); |
354 | if (r < 0) | |
355 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
59512f21 KS |
356 | |
357 | lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL); | |
358 | if (!lnk) | |
359 | return log_oom(); | |
360 | ||
361 | mkdir_parents_label(lnk, 0755); | |
362 | if (symlink(unit, lnk) < 0) | |
363 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
59512f21 | 368 | #ifdef ENABLE_EFI |
7a1494aa TG |
369 | static int add_automount( |
370 | const char *id, | |
371 | const char *what, | |
372 | const char *where, | |
373 | const char *fstype, | |
374 | bool rw, | |
375 | const char *options, | |
376 | const char *description, | |
377 | usec_t timeout) { | |
378 | ||
379 | _cleanup_free_ char *unit = NULL, *lnk = NULL; | |
380 | _cleanup_free_ char *opt, *p = NULL; | |
381 | _cleanup_fclose_ FILE *f = NULL; | |
382 | int r; | |
383 | ||
384 | assert(id); | |
385 | assert(where); | |
386 | assert(description); | |
387 | ||
388 | if (options) | |
389 | opt = strjoin(options, ",noauto", NULL); | |
390 | else | |
391 | opt = strdup("noauto"); | |
392 | if (!opt) | |
393 | return log_oom(); | |
394 | ||
395 | r = add_mount(id, | |
396 | what, | |
397 | where, | |
398 | fstype, | |
399 | rw, | |
400 | opt, | |
401 | description, | |
402 | NULL); | |
403 | if (r < 0) | |
404 | return r; | |
405 | ||
406 | r = unit_name_from_path(where, ".automount", &unit); | |
407 | if (r < 0) | |
408 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
409 | ||
410 | p = strjoin(arg_dest, "/", unit, NULL); | |
411 | if (!p) | |
412 | return log_oom(); | |
413 | ||
414 | f = fopen(p, "wxe"); | |
415 | if (!f) | |
416 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
417 | ||
418 | fprintf(f, | |
419 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
420 | "[Unit]\n" | |
421 | "Description=%s\n" | |
422 | "Documentation=man:systemd-gpt-auto-generator(8)\n" | |
423 | "[Automount]\n" | |
424 | "Where=%s\n" | |
425 | "TimeoutIdleSec=%lld\n", | |
426 | description, | |
427 | where, | |
428 | (unsigned long long)timeout / USEC_PER_SEC); | |
429 | ||
430 | r = fflush_and_check(f); | |
431 | if (r < 0) | |
432 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
433 | ||
434 | lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/", unit, NULL); | |
435 | if (!lnk) | |
436 | return log_oom(); | |
437 | mkdir_parents_label(lnk, 0755); | |
438 | ||
439 | if (symlink(p, lnk) < 0) | |
440 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | static int add_boot(const char *what) { | |
59512f21 KS |
446 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; |
447 | const char *fstype = NULL, *uuid = NULL; | |
448 | sd_id128_t id, type_id; | |
449 | int r; | |
450 | ||
451 | assert(what); | |
452 | ||
453 | if (!is_efi_boot()) { | |
454 | log_debug("Not an EFI boot, ignoring /boot."); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | if (in_initrd()) { | |
459 | log_debug("In initrd, ignoring /boot."); | |
460 | return 0; | |
461 | } | |
462 | ||
75f86906 | 463 | if (detect_container() > 0) { |
59512f21 KS |
464 | log_debug("In a container, ignoring /boot."); |
465 | return 0; | |
466 | } | |
467 | ||
468 | if (path_is_busy("/boot")) { | |
469 | log_debug("/boot already populated, ignoring."); | |
470 | return 0; | |
471 | } | |
472 | ||
473 | r = efi_loader_get_device_part_uuid(&id); | |
474 | if (r == -ENOENT) { | |
475 | log_debug("EFI loader partition unknown."); | |
476 | return 0; | |
477 | } | |
478 | ||
479 | if (r < 0) { | |
480 | log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
481 | return r; | |
482 | } | |
483 | ||
484 | errno = 0; | |
485 | b = blkid_new_probe_from_filename(what); | |
486 | if (!b) { | |
487 | if (errno == 0) | |
488 | return log_oom(); | |
489 | log_error_errno(errno, "Failed to allocate prober: %m"); | |
490 | return -errno; | |
491 | } | |
492 | ||
493 | blkid_probe_enable_partitions(b, 1); | |
494 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
495 | ||
496 | errno = 0; | |
497 | r = blkid_do_safeprobe(b); | |
498 | if (r == -2 || r == 1) /* no result or uncertain */ | |
499 | return 0; | |
500 | else if (r != 0) | |
501 | return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); | |
502 | ||
503 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
504 | if (!streq(fstype, "vfat")) { | |
505 | log_debug("Partition for /boot is not a FAT filesystem, ignoring."); | |
506 | return 0; | |
507 | } | |
508 | ||
509 | r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &uuid, NULL); | |
510 | if (r != 0) { | |
511 | log_debug_errno(r, "Partition for /boot does not have a UUID, ignoring. %m"); | |
512 | return 0; | |
513 | } | |
514 | ||
515 | if (sd_id128_from_string(uuid, &type_id) < 0) { | |
516 | log_debug("Partition for /boot does not have a valid UUID, ignoring."); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | if (!sd_id128_equal(type_id, id)) { | |
521 | log_debug("Partition for /boot does not appear to be the partition we are booted from."); | |
522 | return 0; | |
523 | } | |
524 | ||
525 | r = add_automount("boot", | |
526 | what, | |
527 | "/boot", | |
528 | "vfat", | |
529 | "EFI System Partition Automount", | |
530 | false, | |
531 | "umask=0077", | |
532 | 120 * USEC_PER_SEC); | |
533 | ||
534 | return r; | |
7a1494aa | 535 | } |
59512f21 | 536 | #else |
7a1494aa | 537 | static int add_boot(const char *what) { |
59512f21 | 538 | return 0; |
59512f21 | 539 | } |
7a1494aa | 540 | #endif |
59512f21 | 541 | |
61331eab LP |
542 | static int enumerate_partitions(dev_t devnum) { |
543 | ||
1ca208fb ZJS |
544 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
545 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
61331eab LP |
546 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; |
547 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
59512f21 | 548 | _cleanup_free_ char *boot = NULL, *home = NULL, *srv = NULL; |
1a14a53c | 549 | struct udev_list_entry *first, *item; |
e48fdd84 | 550 | struct udev_device *parent = NULL; |
d2a62382 | 551 | const char *name, *node, *pttype, *devtype; |
59512f21 | 552 | int boot_nr = -1, home_nr = -1, srv_nr = -1; |
cca1dfdd | 553 | bool home_rw = true, srv_rw = true; |
61331eab | 554 | blkid_partlist pl; |
73b80ec2 | 555 | int r, k; |
61331eab | 556 | dev_t pn; |
1a14a53c | 557 | |
61331eab LP |
558 | udev = udev_new(); |
559 | if (!udev) | |
b47d419c | 560 | return log_oom(); |
1a14a53c | 561 | |
61331eab | 562 | d = udev_device_new_from_devnum(udev, 'b', devnum); |
1ca208fb ZJS |
563 | if (!d) |
564 | return log_oom(); | |
1a14a53c | 565 | |
d2a62382 ZJS |
566 | name = udev_device_get_devnode(d); |
567 | if (!name) | |
568 | name = udev_device_get_syspath(d); | |
569 | if (!name) { | |
570 | log_debug("Device %u:%u does not have a name, ignoring.", | |
571 | major(devnum), minor(devnum)); | |
572 | return 0; | |
573 | } | |
574 | ||
1a14a53c | 575 | parent = udev_device_get_parent(d); |
fa041593 | 576 | if (!parent) { |
d2a62382 | 577 | log_debug("%s: not a partitioned device, ignoring.", name); |
9c4495ca | 578 | return 0; |
fa041593 | 579 | } |
1a14a53c | 580 | |
61331eab LP |
581 | /* Does it have a devtype? */ |
582 | devtype = udev_device_get_devtype(parent); | |
fa041593 | 583 | if (!devtype) { |
d2a62382 | 584 | log_debug("%s: parent doesn't have a device type, ignoring.", name); |
61331eab | 585 | return 0; |
fa041593 | 586 | } |
61331eab LP |
587 | |
588 | /* Is this a disk or a partition? We only care for disks... */ | |
fa041593 | 589 | if (!streq(devtype, "disk")) { |
d2a62382 | 590 | log_debug("%s: parent isn't a raw disk, ignoring.", name); |
61331eab | 591 | return 0; |
fa041593 | 592 | } |
61331eab LP |
593 | |
594 | /* Does it have a device node? */ | |
595 | node = udev_device_get_devnode(parent); | |
fa041593 | 596 | if (!node) { |
d2a62382 | 597 | log_debug("%s: parent device does not have device node, ignoring.", name); |
61331eab | 598 | return 0; |
fa041593 | 599 | } |
61331eab | 600 | |
d2a62382 | 601 | log_debug("%s: root device %s.", name, node); |
61331eab LP |
602 | |
603 | pn = udev_device_get_devnum(parent); | |
604 | if (major(pn) == 0) | |
605 | return 0; | |
606 | ||
607 | errno = 0; | |
608 | b = blkid_new_probe_from_filename(node); | |
609 | if (!b) { | |
610 | if (errno == 0) | |
611 | return log_oom(); | |
612 | ||
d2a62382 | 613 | return log_error_errno(errno, "%s: failed to allocate prober: %m", node); |
61331eab LP |
614 | } |
615 | ||
61331eab LP |
616 | blkid_probe_enable_partitions(b, 1); |
617 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
618 | ||
619 | errno = 0; | |
620 | r = blkid_do_safeprobe(b); | |
458a2f85 TG |
621 | if (r == 1) |
622 | return 0; /* no results */ | |
623 | else if (r == -2) { | |
624 | log_warning("%s: probe gave ambiguous results, ignoring", node); | |
61331eab | 625 | return 0; |
458a2f85 | 626 | } else if (r != 0) |
d2a62382 | 627 | return log_error_errno(errno ?: EIO, "%s: failed to probe: %m", node); |
61331eab LP |
628 | |
629 | errno = 0; | |
630 | r = blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
d2a62382 ZJS |
631 | if (r != 0) |
632 | return log_error_errno(errno ?: EIO, | |
633 | "%s: failed to determine partition table type: %m", node); | |
61331eab LP |
634 | |
635 | /* We only do this all for GPT... */ | |
fa041593 | 636 | if (!streq_ptr(pttype, "gpt")) { |
d2a62382 | 637 | log_debug("%s: not a GPT partition table, ignoring.", node); |
61331eab | 638 | return 0; |
fa041593 | 639 | } |
61331eab LP |
640 | |
641 | errno = 0; | |
642 | pl = blkid_probe_get_partitions(b); | |
643 | if (!pl) { | |
644 | if (errno == 0) | |
645 | return log_oom(); | |
646 | ||
d2a62382 | 647 | return log_error_errno(errno, "%s: failed to list partitions: %m", node); |
61331eab LP |
648 | } |
649 | ||
650 | e = udev_enumerate_new(udev); | |
651 | if (!e) | |
652 | return log_oom(); | |
653 | ||
1a14a53c | 654 | r = udev_enumerate_add_match_parent(e, parent); |
1ca208fb ZJS |
655 | if (r < 0) |
656 | return log_oom(); | |
1a14a53c LP |
657 | |
658 | r = udev_enumerate_add_match_subsystem(e, "block"); | |
1ca208fb ZJS |
659 | if (r < 0) |
660 | return log_oom(); | |
1a14a53c LP |
661 | |
662 | r = udev_enumerate_scan_devices(e); | |
23bbb0de | 663 | if (r < 0) |
d2a62382 | 664 | return log_error_errno(r, "%s: failed to enumerate partitions: %m", node); |
1a14a53c LP |
665 | |
666 | first = udev_enumerate_get_list_entry(e); | |
667 | udev_list_entry_foreach(item, first) { | |
e48fdd84 | 668 | _cleanup_udev_device_unref_ struct udev_device *q; |
dd2c31bb | 669 | unsigned long long flags; |
61331eab | 670 | const char *stype, *subnode; |
1a14a53c | 671 | sd_id128_t type_id; |
61331eab LP |
672 | blkid_partition pp; |
673 | dev_t qn; | |
674 | int nr; | |
1a14a53c LP |
675 | |
676 | q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); | |
1ca208fb | 677 | if (!q) |
61331eab | 678 | continue; |
1a14a53c | 679 | |
61331eab LP |
680 | qn = udev_device_get_devnum(q); |
681 | if (major(qn) == 0) | |
1ca208fb | 682 | continue; |
1a14a53c | 683 | |
61331eab | 684 | if (qn == devnum) |
1ca208fb | 685 | continue; |
1a14a53c | 686 | |
61331eab LP |
687 | if (qn == pn) |
688 | continue; | |
1a14a53c | 689 | |
61331eab LP |
690 | subnode = udev_device_get_devnode(q); |
691 | if (!subnode) | |
692 | continue; | |
73b80ec2 | 693 | |
61331eab LP |
694 | pp = blkid_partlist_devno_to_partition(pl, qn); |
695 | if (!pp) | |
73b80ec2 | 696 | continue; |
61331eab LP |
697 | |
698 | nr = blkid_partition_get_partno(pp); | |
699 | if (nr < 0) | |
700 | continue; | |
701 | ||
702 | stype = blkid_partition_get_type_string(pp); | |
703 | if (!stype) | |
704 | continue; | |
705 | ||
706 | if (sd_id128_from_string(stype, &type_id) < 0) | |
1ca208fb | 707 | continue; |
1a14a53c | 708 | |
dd2c31bb LP |
709 | flags = blkid_partition_get_flags(pp); |
710 | ||
73b80ec2 | 711 | if (sd_id128_equal(type_id, GPT_SWAP)) { |
0238d4c6 | 712 | |
0238d4c6 KS |
713 | if (flags & GPT_FLAG_NO_AUTO) |
714 | continue; | |
73b80ec2 | 715 | |
cca1dfdd | 716 | if (flags & GPT_FLAG_READ_ONLY) { |
d2a62382 | 717 | log_debug("%s marked as read-only swap partition, which is bogus. Ignoring.", subnode); |
cca1dfdd LP |
718 | continue; |
719 | } | |
720 | ||
61331eab | 721 | k = add_swap(subnode); |
73b80ec2 LP |
722 | if (k < 0) |
723 | r = k; | |
e48fdd84 | 724 | |
59512f21 KS |
725 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
726 | ||
727 | /* We only care for the first /boot partition */ | |
728 | if (boot && nr >= boot_nr) | |
729 | continue; | |
730 | ||
dd2c31bb LP |
731 | /* Note that we do not honour the "no-auto" |
732 | * flag for the ESP, as it is often unset, to | |
733 | * hide it from Windows. */ | |
734 | ||
59512f21 KS |
735 | boot_nr = nr; |
736 | ||
2fc09a9c DM |
737 | r = free_and_strdup(&boot, subnode); |
738 | if (r < 0) | |
59512f21 KS |
739 | return log_oom(); |
740 | ||
73b80ec2 | 741 | } else if (sd_id128_equal(type_id, GPT_HOME)) { |
0238d4c6 | 742 | |
0238d4c6 KS |
743 | if (flags & GPT_FLAG_NO_AUTO) |
744 | continue; | |
e48fdd84 LP |
745 | |
746 | /* We only care for the first /home partition */ | |
747 | if (home && nr >= home_nr) | |
748 | continue; | |
749 | ||
750 | home_nr = nr; | |
cca1dfdd | 751 | home_rw = !(flags & GPT_FLAG_READ_ONLY), |
e48fdd84 | 752 | |
2fc09a9c DM |
753 | r = free_and_strdup(&home, subnode); |
754 | if (r < 0) | |
e48fdd84 LP |
755 | return log_oom(); |
756 | ||
e48fdd84 | 757 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
0238d4c6 | 758 | |
0238d4c6 KS |
759 | if (flags & GPT_FLAG_NO_AUTO) |
760 | continue; | |
e48fdd84 LP |
761 | |
762 | /* We only care for the first /srv partition */ | |
763 | if (srv && nr >= srv_nr) | |
764 | continue; | |
765 | ||
766 | srv_nr = nr; | |
cca1dfdd | 767 | srv_rw = !(flags & GPT_FLAG_READ_ONLY), |
e48fdd84 | 768 | |
2fc09a9c DM |
769 | r = free_and_strdup(&srv, subnode); |
770 | if (r < 0) | |
e48fdd84 | 771 | return log_oom(); |
1a14a53c | 772 | } |
1a14a53c LP |
773 | } |
774 | ||
59512f21 KS |
775 | if (boot) { |
776 | k = add_boot(boot); | |
777 | if (k < 0) | |
778 | r = k; | |
779 | } | |
780 | ||
61331eab | 781 | if (home) { |
cca1dfdd | 782 | k = probe_and_add_mount("home", home, "/home", home_rw, "Home Partition", SPECIAL_LOCAL_FS_TARGET); |
73b80ec2 LP |
783 | if (k < 0) |
784 | r = k; | |
785 | } | |
e48fdd84 | 786 | |
61331eab | 787 | if (srv) { |
cca1dfdd | 788 | k = probe_and_add_mount("srv", srv, "/srv", srv_rw, "Server Data Partition", SPECIAL_LOCAL_FS_TARGET); |
73b80ec2 LP |
789 | if (k < 0) |
790 | r = k; | |
791 | } | |
1a14a53c | 792 | |
1a14a53c LP |
793 | return r; |
794 | } | |
795 | ||
1a14a53c LP |
796 | static int get_block_device(const char *path, dev_t *dev) { |
797 | struct stat st; | |
798 | struct statfs sfs; | |
799 | ||
800 | assert(path); | |
801 | assert(dev); | |
802 | ||
c6ba0c18 LP |
803 | /* Get's the block device directly backing a file system. If |
804 | * the block device is encrypted, returns the device mapper | |
805 | * block device. */ | |
806 | ||
e48fdd84 | 807 | if (lstat(path, &st)) |
1a14a53c LP |
808 | return -errno; |
809 | ||
810 | if (major(st.st_dev) != 0) { | |
811 | *dev = st.st_dev; | |
812 | return 1; | |
813 | } | |
814 | ||
e48fdd84 | 815 | if (statfs(path, &sfs) < 0) |
1a14a53c LP |
816 | return -errno; |
817 | ||
c51cf056 | 818 | if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC)) |
f9ac1544 | 819 | return btrfs_get_block_device(path, dev); |
1a14a53c LP |
820 | |
821 | return 0; | |
822 | } | |
823 | ||
c6ba0c18 LP |
824 | static int get_block_device_harder(const char *path, dev_t *dev) { |
825 | _cleanup_closedir_ DIR *d = NULL; | |
826 | _cleanup_free_ char *p = NULL, *t = NULL; | |
827 | struct dirent *de, *found = NULL; | |
828 | const char *q; | |
829 | unsigned maj, min; | |
830 | dev_t dt; | |
831 | int r; | |
832 | ||
833 | assert(path); | |
834 | assert(dev); | |
835 | ||
836 | /* Gets the backing block device for a file system, and | |
837 | * handles LUKS encrypted file systems, looking for its | |
838 | * immediate parent, if there is one. */ | |
839 | ||
840 | r = get_block_device(path, &dt); | |
841 | if (r <= 0) | |
842 | return r; | |
843 | ||
844 | if (asprintf(&p, "/sys/dev/block/%u:%u/slaves", major(dt), minor(dt)) < 0) | |
845 | return -ENOMEM; | |
846 | ||
847 | d = opendir(p); | |
848 | if (!d) { | |
849 | if (errno == ENOENT) | |
850 | goto fallback; | |
851 | ||
852 | return -errno; | |
853 | } | |
854 | ||
855 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
856 | ||
857 | if (STR_IN_SET(de->d_name, ".", "..")) | |
858 | continue; | |
859 | ||
860 | if (!IN_SET(de->d_type, DT_LNK, DT_UNKNOWN)) | |
861 | continue; | |
862 | ||
863 | if (found) /* Don't try to support multiple backing block devices */ | |
864 | goto fallback; | |
865 | ||
866 | found = de; | |
867 | break; | |
868 | } | |
869 | ||
870 | if (!found) | |
871 | goto fallback; | |
872 | ||
873 | q = strjoina(p, "/", found->d_name, "/dev"); | |
874 | ||
875 | r = read_one_line_file(q, &t); | |
876 | if (r == -ENOENT) | |
877 | goto fallback; | |
878 | if (r < 0) | |
879 | return r; | |
880 | ||
881 | if (sscanf(t, "%u:%u", &maj, &min) != 2) | |
882 | return -EINVAL; | |
883 | ||
884 | if (maj == 0) | |
885 | goto fallback; | |
886 | ||
887 | *dev = makedev(maj, min); | |
888 | return 1; | |
889 | ||
890 | fallback: | |
891 | *dev = dt; | |
892 | return 1; | |
893 | } | |
894 | ||
73b80ec2 LP |
895 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
896 | int r; | |
1a14a53c | 897 | |
73b80ec2 | 898 | assert(key); |
1a14a53c | 899 | |
73b80ec2 | 900 | if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto") && value) { |
1a14a53c | 901 | |
73b80ec2 LP |
902 | r = parse_boolean(value); |
903 | if (r < 0) | |
d2a62382 | 904 | log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value); |
8086ffac ZJS |
905 | else |
906 | arg_enabled = r; | |
1a14a53c | 907 | |
73b80ec2 LP |
908 | } else if (streq(key, "root") && value) { |
909 | ||
910 | /* Disable root disk logic if there's a root= value | |
911 | * specified (unless it happens to be "gpt-auto") */ | |
912 | ||
913 | arg_root_enabled = streq(value, "gpt-auto"); | |
914 | ||
915 | } else if (streq(key, "rw") && !value) | |
916 | arg_root_rw = true; | |
917 | else if (streq(key, "ro") && !value) | |
918 | arg_root_rw = false; | |
73b80ec2 LP |
919 | |
920 | return 0; | |
921 | } | |
922 | ||
923 | static int add_root_mount(void) { | |
924 | ||
925 | #ifdef ENABLE_EFI | |
926 | int r; | |
927 | ||
928 | if (!is_efi_boot()) { | |
929 | log_debug("Not a EFI boot, not creating root mount."); | |
930 | return 0; | |
9a5cb137 ZJS |
931 | } |
932 | ||
73b80ec2 LP |
933 | r = efi_loader_get_device_part_uuid(NULL); |
934 | if (r == -ENOENT) { | |
935 | log_debug("EFI loader partition unknown, exiting."); | |
936 | return 0; | |
23bbb0de MS |
937 | } else if (r < 0) |
938 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
1a14a53c | 939 | |
73b80ec2 LP |
940 | /* OK, we have an ESP partition, this is fantastic, so let's |
941 | * wait for a root device to show up. A udev rule will create | |
942 | * the link for us under the right name. */ | |
943 | ||
944 | return add_mount( | |
945 | "root", | |
98b2f766 | 946 | "/dev/gpt-auto-root", |
73b80ec2 LP |
947 | in_initrd() ? "/sysroot" : "/", |
948 | NULL, | |
cca1dfdd | 949 | arg_root_rw, |
59512f21 | 950 | NULL, |
73b80ec2 LP |
951 | "Root Partition", |
952 | in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET); | |
953 | #else | |
954 | return 0; | |
955 | #endif | |
956 | } | |
957 | ||
958 | static int add_mounts(void) { | |
73b80ec2 LP |
959 | dev_t devno; |
960 | int r; | |
961 | ||
c6ba0c18 | 962 | r = get_block_device_harder("/", &devno); |
23bbb0de MS |
963 | if (r < 0) |
964 | return log_error_errno(r, "Failed to determine block device of root file system: %m"); | |
965 | else if (r == 0) { | |
c6ba0c18 | 966 | r = get_block_device_harder("/usr", &devno); |
eafe88e3 TH |
967 | if (r < 0) |
968 | return log_error_errno(r, "Failed to determine block device of /usr file system: %m"); | |
969 | else if (r == 0) { | |
970 | log_debug("Neither root nor /usr file system are on a (single) block device."); | |
971 | return 0; | |
972 | } | |
3db604b9 LP |
973 | } |
974 | ||
61331eab | 975 | return enumerate_partitions(devno); |
73b80ec2 LP |
976 | } |
977 | ||
978 | int main(int argc, char *argv[]) { | |
979 | int r = 0; | |
980 | ||
981 | if (argc > 1 && argc != 4) { | |
982 | log_error("This program takes three or no arguments."); | |
983 | return EXIT_FAILURE; | |
984 | } | |
985 | ||
986 | if (argc > 1) | |
987 | arg_dest = argv[3]; | |
988 | ||
989 | log_set_target(LOG_TARGET_SAFE); | |
990 | log_parse_environment(); | |
991 | log_open(); | |
992 | ||
993 | umask(0022); | |
994 | ||
75f86906 | 995 | if (detect_container() > 0) { |
73b80ec2 | 996 | log_debug("In a container, exiting."); |
e48fdd84 | 997 | return EXIT_SUCCESS; |
1a14a53c | 998 | } |
3db604b9 | 999 | |
b5884878 LP |
1000 | r = parse_proc_cmdline(parse_proc_cmdline_item); |
1001 | if (r < 0) | |
da927ba9 | 1002 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
1a14a53c | 1003 | |
73b80ec2 LP |
1004 | if (!arg_enabled) { |
1005 | log_debug("Disabled, exiting."); | |
1006 | return EXIT_SUCCESS; | |
1007 | } | |
1008 | ||
1009 | if (arg_root_enabled) | |
1010 | r = add_root_mount(); | |
1011 | ||
1012 | if (!in_initrd()) { | |
1013 | int k; | |
1014 | ||
1015 | k = add_mounts(); | |
1016 | if (k < 0) | |
1017 | r = k; | |
1018 | } | |
1019 | ||
1020 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1a14a53c | 1021 | } |