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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 | 27 | #include "libudev.h" |
07630cea LP |
28 | #include "sd-id128.h" |
29 | ||
30 | #include "blkid-util.h" | |
31 | #include "btrfs-util.h" | |
32 | #include "efivars.h" | |
3ffd4af2 | 33 | #include "fd-util.h" |
07630cea LP |
34 | #include "fileio.h" |
35 | #include "fstab-util.h" | |
36 | #include "generator.h" | |
37 | #include "gpt.h" | |
1a14a53c | 38 | #include "missing.h" |
07630cea | 39 | #include "mkdir.h" |
6bedfcbb | 40 | #include "parse-util.h" |
07630cea | 41 | #include "path-util.h" |
1a14a53c | 42 | #include "special.h" |
07630cea LP |
43 | #include "string-util.h" |
44 | #include "udev-util.h" | |
1a14a53c | 45 | #include "unit-name.h" |
07630cea | 46 | #include "util.h" |
9a5cb137 | 47 | #include "virt.h" |
1a14a53c | 48 | |
1a14a53c | 49 | static const char *arg_dest = "/tmp"; |
73b80ec2 LP |
50 | static bool arg_enabled = true; |
51 | static bool arg_root_enabled = true; | |
52 | static bool arg_root_rw = false; | |
1a14a53c | 53 | |
cca1dfdd | 54 | static int add_cryptsetup(const char *id, const char *what, bool rw, char **device) { |
1af72119 LP |
55 | _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL, *to = NULL; |
56 | _cleanup_fclose_ FILE *f = NULL; | |
57 | char *from, *ret; | |
58 | int r; | |
59 | ||
60 | assert(id); | |
61 | assert(what); | |
62 | assert(device); | |
63 | ||
7410616c LP |
64 | r = unit_name_from_path(what, ".device", &d); |
65 | if (r < 0) | |
66 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
67 | |
68 | e = unit_name_escape(id); | |
69 | if (!e) | |
70 | return log_oom(); | |
71 | ||
7410616c LP |
72 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
73 | if (r < 0) | |
74 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
75 | |
76 | p = strjoin(arg_dest, "/", n, NULL); | |
821b2e79 | 77 | if (!p) |
1af72119 LP |
78 | return log_oom(); |
79 | ||
80 | f = fopen(p, "wxe"); | |
4a62c710 MS |
81 | if (!f) |
82 | return log_error_errno(errno, "Failed to create unit file %s: %m", p); | |
1af72119 LP |
83 | |
84 | fprintf(f, | |
85 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
86 | "[Unit]\n" | |
87 | "Description=Cryptography Setup for %%I\n" | |
c3834f9b | 88 | "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n" |
1af72119 LP |
89 | "DefaultDependencies=no\n" |
90 | "Conflicts=umount.target\n" | |
91 | "BindsTo=dev-mapper-%%i.device %s\n" | |
92 | "Before=umount.target cryptsetup.target\n" | |
93 | "After=%s\n" | |
94 | "IgnoreOnIsolate=true\n" | |
1af72119 LP |
95 | "[Service]\n" |
96 | "Type=oneshot\n" | |
97 | "RemainAfterExit=yes\n" | |
98 | "TimeoutSec=0\n" /* the binary handles timeouts anyway */ | |
cca1dfdd | 99 | "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n" |
1af72119 LP |
100 | "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", |
101 | d, d, | |
cca1dfdd | 102 | id, what, rw ? "" : "read-only", |
1af72119 LP |
103 | id); |
104 | ||
dacd6cee LP |
105 | r = fflush_and_check(f); |
106 | if (r < 0) | |
107 | return log_error_errno(r, "Failed to write file %s: %m", p); | |
1af72119 | 108 | |
63c372cb | 109 | from = strjoina("../", n); |
1af72119 LP |
110 | |
111 | to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); | |
112 | if (!to) | |
113 | return log_oom(); | |
114 | ||
115 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
116 | if (symlink(from, to) < 0) |
117 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
118 | |
119 | free(to); | |
120 | to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL); | |
121 | if (!to) | |
122 | return log_oom(); | |
123 | ||
124 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
125 | if (symlink(from, to) < 0) |
126 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
127 | |
128 | free(to); | |
129 | to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); | |
130 | if (!to) | |
131 | return log_oom(); | |
132 | ||
133 | mkdir_parents_label(to, 0755); | |
4a62c710 MS |
134 | if (symlink(from, to) < 0) |
135 | return log_error_errno(errno, "Failed to create symlink %s: %m", to); | |
1af72119 LP |
136 | |
137 | free(p); | |
138 | p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf", NULL); | |
139 | if (!p) | |
140 | return log_oom(); | |
141 | ||
142 | mkdir_parents_label(p, 0755); | |
143 | r = write_string_file(p, | |
144 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
145 | "[Unit]\n" | |
4c1fc3e4 DM |
146 | "JobTimeoutSec=0\n", |
147 | WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */ | |
23bbb0de MS |
148 | if (r < 0) |
149 | return log_error_errno(r, "Failed to write device drop-in: %m"); | |
1af72119 LP |
150 | |
151 | ret = strappend("/dev/mapper/", id); | |
152 | if (!ret) | |
153 | return log_oom(); | |
154 | ||
155 | *device = ret; | |
156 | return 0; | |
157 | } | |
158 | ||
73b80ec2 LP |
159 | static int add_mount( |
160 | const char *id, | |
161 | const char *what, | |
162 | const char *where, | |
163 | const char *fstype, | |
cca1dfdd | 164 | bool rw, |
59512f21 | 165 | const char *options, |
73b80ec2 LP |
166 | const char *description, |
167 | const char *post) { | |
168 | ||
1af72119 | 169 | _cleanup_free_ char *unit = NULL, *lnk = NULL, *crypto_what = NULL, *p = NULL; |
1a14a53c | 170 | _cleanup_fclose_ FILE *f = NULL; |
e48fdd84 | 171 | int r; |
1a14a53c | 172 | |
1af72119 LP |
173 | assert(id); |
174 | assert(what); | |
175 | assert(where); | |
1af72119 LP |
176 | assert(description); |
177 | ||
73b80ec2 | 178 | log_debug("Adding %s: %s %s", where, what, strna(fstype)); |
1a14a53c | 179 | |
73b80ec2 | 180 | if (streq_ptr(fstype, "crypto_LUKS")) { |
1af72119 | 181 | |
cca1dfdd | 182 | r = add_cryptsetup(id, what, rw, &crypto_what); |
1af72119 LP |
183 | if (r < 0) |
184 | return r; | |
185 | ||
186 | what = crypto_what; | |
187 | fstype = NULL; | |
188 | } | |
189 | ||
7410616c LP |
190 | r = unit_name_from_path(where, ".mount", &unit); |
191 | if (r < 0) | |
192 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1a14a53c | 193 | |
e48fdd84 LP |
194 | p = strjoin(arg_dest, "/", unit, NULL); |
195 | if (!p) | |
196 | return log_oom(); | |
197 | ||
198 | f = fopen(p, "wxe"); | |
4a62c710 MS |
199 | if (!f) |
200 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
1a14a53c LP |
201 | |
202 | fprintf(f, | |
203 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
204 | "[Unit]\n" | |
c3834f9b LP |
205 | "Description=%s\n" |
206 | "Documentation=man:systemd-gpt-auto-generator(8)\n", | |
e48fdd84 LP |
207 | description); |
208 | ||
73b80ec2 LP |
209 | if (post) |
210 | fprintf(f, "Before=%s\n", post); | |
211 | ||
e48fdd84 LP |
212 | r = generator_write_fsck_deps(f, arg_dest, what, where, fstype); |
213 | if (r < 0) | |
214 | return r; | |
215 | ||
216 | fprintf(f, | |
217 | "\n" | |
1a14a53c LP |
218 | "[Mount]\n" |
219 | "What=%s\n" | |
1af72119 LP |
220 | "Where=%s\n", |
221 | what, where); | |
222 | ||
73b80ec2 LP |
223 | if (fstype) |
224 | fprintf(f, "Type=%s\n", fstype); | |
225 | ||
59512f21 KS |
226 | if (options) |
227 | fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); | |
228 | else | |
229 | fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); | |
1a14a53c | 230 | |
dacd6cee LP |
231 | r = fflush_and_check(f); |
232 | if (r < 0) | |
233 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
1a14a53c | 234 | |
73b80ec2 LP |
235 | if (post) { |
236 | lnk = strjoin(arg_dest, "/", post, ".requires/", unit, NULL); | |
237 | if (!lnk) | |
238 | return log_oom(); | |
1a14a53c | 239 | |
73b80ec2 | 240 | mkdir_parents_label(lnk, 0755); |
4a62c710 MS |
241 | if (symlink(p, lnk) < 0) |
242 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
1a14a53c LP |
243 | } |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
59512f21 KS |
248 | static bool path_is_busy(const char *where) { |
249 | int r; | |
250 | ||
251 | /* already a mountpoint; generators run during reload */ | |
252 | r = path_is_mount_point(where, AT_SYMLINK_FOLLOW); | |
253 | if (r > 0) | |
254 | return false; | |
255 | ||
256 | /* the directory might not exist on a stateless system */ | |
257 | if (r == -ENOENT) | |
258 | return false; | |
259 | ||
260 | if (r < 0) | |
261 | return true; | |
262 | ||
263 | /* not a mountpoint but it contains files */ | |
264 | if (dir_is_empty(where) <= 0) | |
265 | return true; | |
266 | ||
267 | return false; | |
268 | } | |
269 | ||
61331eab LP |
270 | static int probe_and_add_mount( |
271 | const char *id, | |
272 | const char *what, | |
273 | const char *where, | |
cca1dfdd | 274 | bool rw, |
61331eab LP |
275 | const char *description, |
276 | const char *post) { | |
277 | ||
278 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; | |
a0b1209c | 279 | const char *fstype = NULL; |
61331eab LP |
280 | int r; |
281 | ||
282 | assert(id); | |
283 | assert(what); | |
284 | assert(where); | |
285 | assert(description); | |
286 | ||
59512f21 | 287 | if (path_is_busy(where)) { |
61331eab LP |
288 | log_debug("%s already populated, ignoring.", where); |
289 | return 0; | |
290 | } | |
291 | ||
292 | /* Let's check the partition type here, so that we know | |
293 | * whether to do LUKS magic. */ | |
294 | ||
295 | errno = 0; | |
296 | b = blkid_new_probe_from_filename(what); | |
297 | if (!b) { | |
298 | if (errno == 0) | |
299 | return log_oom(); | |
56f64d95 | 300 | log_error_errno(errno, "Failed to allocate prober: %m"); |
61331eab LP |
301 | return -errno; |
302 | } | |
303 | ||
304 | blkid_probe_enable_superblocks(b, 1); | |
305 | blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE); | |
306 | ||
307 | errno = 0; | |
308 | r = blkid_do_safeprobe(b); | |
309 | if (r == -2 || r == 1) /* no result or uncertain */ | |
310 | return 0; | |
a0b1209c ZJS |
311 | else if (r != 0) |
312 | return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); | |
61331eab | 313 | |
a0b1209c ZJS |
314 | /* add_mount is OK with fstype being NULL. */ |
315 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
61331eab LP |
316 | |
317 | return add_mount( | |
318 | id, | |
319 | what, | |
320 | where, | |
321 | fstype, | |
cca1dfdd | 322 | rw, |
59512f21 | 323 | NULL, |
61331eab LP |
324 | description, |
325 | post); | |
326 | } | |
327 | ||
59512f21 KS |
328 | static int add_swap(const char *path) { |
329 | _cleanup_free_ char *name = NULL, *unit = NULL, *lnk = NULL; | |
330 | _cleanup_fclose_ FILE *f = NULL; | |
331 | int r; | |
332 | ||
333 | assert(path); | |
334 | ||
335 | log_debug("Adding swap: %s", path); | |
336 | ||
337 | r = unit_name_from_path(path, ".swap", &name); | |
338 | if (r < 0) | |
339 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
340 | ||
341 | unit = strjoin(arg_dest, "/", name, NULL); | |
342 | if (!unit) | |
343 | return log_oom(); | |
344 | ||
345 | f = fopen(unit, "wxe"); | |
346 | if (!f) | |
347 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
348 | ||
349 | fprintf(f, | |
350 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
351 | "[Unit]\n" | |
352 | "Description=Swap Partition\n" | |
353 | "Documentation=man:systemd-gpt-auto-generator(8)\n\n" | |
354 | "[Swap]\n" | |
355 | "What=%s\n", | |
356 | path); | |
357 | ||
dacd6cee LP |
358 | r = fflush_and_check(f); |
359 | if (r < 0) | |
360 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
59512f21 KS |
361 | |
362 | lnk = strjoin(arg_dest, "/" SPECIAL_SWAP_TARGET ".wants/", name, NULL); | |
363 | if (!lnk) | |
364 | return log_oom(); | |
365 | ||
366 | mkdir_parents_label(lnk, 0755); | |
367 | if (symlink(unit, lnk) < 0) | |
368 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
59512f21 | 373 | #ifdef ENABLE_EFI |
7a1494aa TG |
374 | static int add_automount( |
375 | const char *id, | |
376 | const char *what, | |
377 | const char *where, | |
378 | const char *fstype, | |
379 | bool rw, | |
380 | const char *options, | |
381 | const char *description, | |
382 | usec_t timeout) { | |
383 | ||
384 | _cleanup_free_ char *unit = NULL, *lnk = NULL; | |
385 | _cleanup_free_ char *opt, *p = NULL; | |
386 | _cleanup_fclose_ FILE *f = NULL; | |
387 | int r; | |
388 | ||
389 | assert(id); | |
390 | assert(where); | |
391 | assert(description); | |
392 | ||
393 | if (options) | |
394 | opt = strjoin(options, ",noauto", NULL); | |
395 | else | |
396 | opt = strdup("noauto"); | |
397 | if (!opt) | |
398 | return log_oom(); | |
399 | ||
400 | r = add_mount(id, | |
401 | what, | |
402 | where, | |
403 | fstype, | |
404 | rw, | |
405 | opt, | |
406 | description, | |
407 | NULL); | |
408 | if (r < 0) | |
409 | return r; | |
410 | ||
411 | r = unit_name_from_path(where, ".automount", &unit); | |
412 | if (r < 0) | |
413 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
414 | ||
415 | p = strjoin(arg_dest, "/", unit, NULL); | |
416 | if (!p) | |
417 | return log_oom(); | |
418 | ||
419 | f = fopen(p, "wxe"); | |
420 | if (!f) | |
421 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
422 | ||
423 | fprintf(f, | |
424 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
425 | "[Unit]\n" | |
426 | "Description=%s\n" | |
427 | "Documentation=man:systemd-gpt-auto-generator(8)\n" | |
428 | "[Automount]\n" | |
429 | "Where=%s\n" | |
430 | "TimeoutIdleSec=%lld\n", | |
431 | description, | |
432 | where, | |
433 | (unsigned long long)timeout / USEC_PER_SEC); | |
434 | ||
435 | r = fflush_and_check(f); | |
436 | if (r < 0) | |
437 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
438 | ||
439 | lnk = strjoin(arg_dest, "/" SPECIAL_LOCAL_FS_TARGET ".wants/", unit, NULL); | |
440 | if (!lnk) | |
441 | return log_oom(); | |
442 | mkdir_parents_label(lnk, 0755); | |
443 | ||
444 | if (symlink(p, lnk) < 0) | |
445 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static int add_boot(const char *what) { | |
59512f21 KS |
451 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; |
452 | const char *fstype = NULL, *uuid = NULL; | |
453 | sd_id128_t id, type_id; | |
454 | int r; | |
455 | ||
456 | assert(what); | |
457 | ||
458 | if (!is_efi_boot()) { | |
459 | log_debug("Not an EFI boot, ignoring /boot."); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | if (in_initrd()) { | |
464 | log_debug("In initrd, ignoring /boot."); | |
465 | return 0; | |
466 | } | |
467 | ||
75f86906 | 468 | if (detect_container() > 0) { |
59512f21 KS |
469 | log_debug("In a container, ignoring /boot."); |
470 | return 0; | |
471 | } | |
472 | ||
0b6b6787 KS |
473 | /* We create an .automount which is not overridden by the .mount from the fstab generator. */ |
474 | if (fstab_is_mount_point("/boot")) { | |
475 | log_debug("/boot specified in fstab, ignoring."); | |
476 | return 0; | |
477 | } | |
478 | ||
59512f21 KS |
479 | if (path_is_busy("/boot")) { |
480 | log_debug("/boot already populated, ignoring."); | |
481 | return 0; | |
482 | } | |
483 | ||
484 | r = efi_loader_get_device_part_uuid(&id); | |
485 | if (r == -ENOENT) { | |
486 | log_debug("EFI loader partition unknown."); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | if (r < 0) { | |
491 | log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
492 | return r; | |
493 | } | |
494 | ||
495 | errno = 0; | |
496 | b = blkid_new_probe_from_filename(what); | |
497 | if (!b) { | |
498 | if (errno == 0) | |
499 | return log_oom(); | |
500 | log_error_errno(errno, "Failed to allocate prober: %m"); | |
501 | return -errno; | |
502 | } | |
503 | ||
504 | blkid_probe_enable_partitions(b, 1); | |
505 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
506 | ||
507 | errno = 0; | |
508 | r = blkid_do_safeprobe(b); | |
509 | if (r == -2 || r == 1) /* no result or uncertain */ | |
510 | return 0; | |
511 | else if (r != 0) | |
512 | return log_error_errno(errno ?: EIO, "Failed to probe %s: %m", what); | |
513 | ||
514 | (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL); | |
515 | if (!streq(fstype, "vfat")) { | |
516 | log_debug("Partition for /boot is not a FAT filesystem, ignoring."); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | r = blkid_probe_lookup_value(b, "PART_ENTRY_UUID", &uuid, NULL); | |
521 | if (r != 0) { | |
522 | log_debug_errno(r, "Partition for /boot does not have a UUID, ignoring. %m"); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | if (sd_id128_from_string(uuid, &type_id) < 0) { | |
527 | log_debug("Partition for /boot does not have a valid UUID, ignoring."); | |
528 | return 0; | |
529 | } | |
530 | ||
531 | if (!sd_id128_equal(type_id, id)) { | |
532 | log_debug("Partition for /boot does not appear to be the partition we are booted from."); | |
533 | return 0; | |
534 | } | |
535 | ||
536 | r = add_automount("boot", | |
537 | what, | |
538 | "/boot", | |
539 | "vfat", | |
158df4b6 | 540 | true, |
59512f21 | 541 | "umask=0077", |
158df4b6 | 542 | "EFI System Partition Automount", |
59512f21 KS |
543 | 120 * USEC_PER_SEC); |
544 | ||
545 | return r; | |
7a1494aa | 546 | } |
59512f21 | 547 | #else |
7a1494aa | 548 | static int add_boot(const char *what) { |
59512f21 | 549 | return 0; |
59512f21 | 550 | } |
7a1494aa | 551 | #endif |
59512f21 | 552 | |
61331eab LP |
553 | static int enumerate_partitions(dev_t devnum) { |
554 | ||
1ca208fb ZJS |
555 | _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL; |
556 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
61331eab LP |
557 | _cleanup_blkid_free_probe_ blkid_probe b = NULL; |
558 | _cleanup_udev_unref_ struct udev *udev = NULL; | |
59512f21 | 559 | _cleanup_free_ char *boot = NULL, *home = NULL, *srv = NULL; |
1a14a53c | 560 | struct udev_list_entry *first, *item; |
e48fdd84 | 561 | struct udev_device *parent = NULL; |
d2a62382 | 562 | const char *name, *node, *pttype, *devtype; |
59512f21 | 563 | int boot_nr = -1, home_nr = -1, srv_nr = -1; |
cca1dfdd | 564 | bool home_rw = true, srv_rw = true; |
61331eab | 565 | blkid_partlist pl; |
73b80ec2 | 566 | int r, k; |
61331eab | 567 | dev_t pn; |
1a14a53c | 568 | |
61331eab LP |
569 | udev = udev_new(); |
570 | if (!udev) | |
b47d419c | 571 | return log_oom(); |
1a14a53c | 572 | |
61331eab | 573 | d = udev_device_new_from_devnum(udev, 'b', devnum); |
1ca208fb ZJS |
574 | if (!d) |
575 | return log_oom(); | |
1a14a53c | 576 | |
d2a62382 ZJS |
577 | name = udev_device_get_devnode(d); |
578 | if (!name) | |
579 | name = udev_device_get_syspath(d); | |
580 | if (!name) { | |
581 | log_debug("Device %u:%u does not have a name, ignoring.", | |
582 | major(devnum), minor(devnum)); | |
583 | return 0; | |
584 | } | |
585 | ||
1a14a53c | 586 | parent = udev_device_get_parent(d); |
fa041593 | 587 | if (!parent) { |
d2a62382 | 588 | log_debug("%s: not a partitioned device, ignoring.", name); |
9c4495ca | 589 | return 0; |
fa041593 | 590 | } |
1a14a53c | 591 | |
61331eab LP |
592 | /* Does it have a devtype? */ |
593 | devtype = udev_device_get_devtype(parent); | |
fa041593 | 594 | if (!devtype) { |
d2a62382 | 595 | log_debug("%s: parent doesn't have a device type, ignoring.", name); |
61331eab | 596 | return 0; |
fa041593 | 597 | } |
61331eab LP |
598 | |
599 | /* Is this a disk or a partition? We only care for disks... */ | |
fa041593 | 600 | if (!streq(devtype, "disk")) { |
d2a62382 | 601 | log_debug("%s: parent isn't a raw disk, ignoring.", name); |
61331eab | 602 | return 0; |
fa041593 | 603 | } |
61331eab LP |
604 | |
605 | /* Does it have a device node? */ | |
606 | node = udev_device_get_devnode(parent); | |
fa041593 | 607 | if (!node) { |
d2a62382 | 608 | log_debug("%s: parent device does not have device node, ignoring.", name); |
61331eab | 609 | return 0; |
fa041593 | 610 | } |
61331eab | 611 | |
d2a62382 | 612 | log_debug("%s: root device %s.", name, node); |
61331eab LP |
613 | |
614 | pn = udev_device_get_devnum(parent); | |
615 | if (major(pn) == 0) | |
616 | return 0; | |
617 | ||
618 | errno = 0; | |
619 | b = blkid_new_probe_from_filename(node); | |
620 | if (!b) { | |
621 | if (errno == 0) | |
622 | return log_oom(); | |
623 | ||
d2a62382 | 624 | return log_error_errno(errno, "%s: failed to allocate prober: %m", node); |
61331eab LP |
625 | } |
626 | ||
61331eab LP |
627 | blkid_probe_enable_partitions(b, 1); |
628 | blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS); | |
629 | ||
630 | errno = 0; | |
631 | r = blkid_do_safeprobe(b); | |
458a2f85 TG |
632 | if (r == 1) |
633 | return 0; /* no results */ | |
634 | else if (r == -2) { | |
635 | log_warning("%s: probe gave ambiguous results, ignoring", node); | |
61331eab | 636 | return 0; |
458a2f85 | 637 | } else if (r != 0) |
d2a62382 | 638 | return log_error_errno(errno ?: EIO, "%s: failed to probe: %m", node); |
61331eab LP |
639 | |
640 | errno = 0; | |
641 | r = blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL); | |
d2a62382 ZJS |
642 | if (r != 0) |
643 | return log_error_errno(errno ?: EIO, | |
644 | "%s: failed to determine partition table type: %m", node); | |
61331eab LP |
645 | |
646 | /* We only do this all for GPT... */ | |
fa041593 | 647 | if (!streq_ptr(pttype, "gpt")) { |
d2a62382 | 648 | log_debug("%s: not a GPT partition table, ignoring.", node); |
61331eab | 649 | return 0; |
fa041593 | 650 | } |
61331eab LP |
651 | |
652 | errno = 0; | |
653 | pl = blkid_probe_get_partitions(b); | |
654 | if (!pl) { | |
655 | if (errno == 0) | |
656 | return log_oom(); | |
657 | ||
d2a62382 | 658 | return log_error_errno(errno, "%s: failed to list partitions: %m", node); |
61331eab LP |
659 | } |
660 | ||
661 | e = udev_enumerate_new(udev); | |
662 | if (!e) | |
663 | return log_oom(); | |
664 | ||
1a14a53c | 665 | r = udev_enumerate_add_match_parent(e, parent); |
1ca208fb ZJS |
666 | if (r < 0) |
667 | return log_oom(); | |
1a14a53c LP |
668 | |
669 | r = udev_enumerate_add_match_subsystem(e, "block"); | |
1ca208fb ZJS |
670 | if (r < 0) |
671 | return log_oom(); | |
1a14a53c LP |
672 | |
673 | r = udev_enumerate_scan_devices(e); | |
23bbb0de | 674 | if (r < 0) |
d2a62382 | 675 | return log_error_errno(r, "%s: failed to enumerate partitions: %m", node); |
1a14a53c LP |
676 | |
677 | first = udev_enumerate_get_list_entry(e); | |
678 | udev_list_entry_foreach(item, first) { | |
e48fdd84 | 679 | _cleanup_udev_device_unref_ struct udev_device *q; |
dd2c31bb | 680 | unsigned long long flags; |
61331eab | 681 | const char *stype, *subnode; |
1a14a53c | 682 | sd_id128_t type_id; |
61331eab LP |
683 | blkid_partition pp; |
684 | dev_t qn; | |
685 | int nr; | |
1a14a53c LP |
686 | |
687 | q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); | |
1ca208fb | 688 | if (!q) |
61331eab | 689 | continue; |
1a14a53c | 690 | |
61331eab LP |
691 | qn = udev_device_get_devnum(q); |
692 | if (major(qn) == 0) | |
1ca208fb | 693 | continue; |
1a14a53c | 694 | |
61331eab | 695 | if (qn == devnum) |
1ca208fb | 696 | continue; |
1a14a53c | 697 | |
61331eab LP |
698 | if (qn == pn) |
699 | continue; | |
1a14a53c | 700 | |
61331eab LP |
701 | subnode = udev_device_get_devnode(q); |
702 | if (!subnode) | |
703 | continue; | |
73b80ec2 | 704 | |
61331eab LP |
705 | pp = blkid_partlist_devno_to_partition(pl, qn); |
706 | if (!pp) | |
73b80ec2 | 707 | continue; |
61331eab LP |
708 | |
709 | nr = blkid_partition_get_partno(pp); | |
710 | if (nr < 0) | |
711 | continue; | |
712 | ||
713 | stype = blkid_partition_get_type_string(pp); | |
714 | if (!stype) | |
715 | continue; | |
716 | ||
717 | if (sd_id128_from_string(stype, &type_id) < 0) | |
1ca208fb | 718 | continue; |
1a14a53c | 719 | |
dd2c31bb LP |
720 | flags = blkid_partition_get_flags(pp); |
721 | ||
73b80ec2 | 722 | if (sd_id128_equal(type_id, GPT_SWAP)) { |
0238d4c6 | 723 | |
0238d4c6 KS |
724 | if (flags & GPT_FLAG_NO_AUTO) |
725 | continue; | |
73b80ec2 | 726 | |
cca1dfdd | 727 | if (flags & GPT_FLAG_READ_ONLY) { |
d2a62382 | 728 | log_debug("%s marked as read-only swap partition, which is bogus. Ignoring.", subnode); |
cca1dfdd LP |
729 | continue; |
730 | } | |
731 | ||
61331eab | 732 | k = add_swap(subnode); |
73b80ec2 LP |
733 | if (k < 0) |
734 | r = k; | |
e48fdd84 | 735 | |
59512f21 KS |
736 | } else if (sd_id128_equal(type_id, GPT_ESP)) { |
737 | ||
738 | /* We only care for the first /boot partition */ | |
739 | if (boot && nr >= boot_nr) | |
740 | continue; | |
741 | ||
dd2c31bb LP |
742 | /* Note that we do not honour the "no-auto" |
743 | * flag for the ESP, as it is often unset, to | |
744 | * hide it from Windows. */ | |
745 | ||
59512f21 KS |
746 | boot_nr = nr; |
747 | ||
2fc09a9c DM |
748 | r = free_and_strdup(&boot, subnode); |
749 | if (r < 0) | |
59512f21 KS |
750 | return log_oom(); |
751 | ||
73b80ec2 | 752 | } else if (sd_id128_equal(type_id, GPT_HOME)) { |
0238d4c6 | 753 | |
0238d4c6 KS |
754 | if (flags & GPT_FLAG_NO_AUTO) |
755 | continue; | |
e48fdd84 LP |
756 | |
757 | /* We only care for the first /home partition */ | |
758 | if (home && nr >= home_nr) | |
759 | continue; | |
760 | ||
761 | home_nr = nr; | |
cca1dfdd | 762 | home_rw = !(flags & GPT_FLAG_READ_ONLY), |
e48fdd84 | 763 | |
2fc09a9c DM |
764 | r = free_and_strdup(&home, subnode); |
765 | if (r < 0) | |
e48fdd84 LP |
766 | return log_oom(); |
767 | ||
e48fdd84 | 768 | } else if (sd_id128_equal(type_id, GPT_SRV)) { |
0238d4c6 | 769 | |
0238d4c6 KS |
770 | if (flags & GPT_FLAG_NO_AUTO) |
771 | continue; | |
e48fdd84 LP |
772 | |
773 | /* We only care for the first /srv partition */ | |
774 | if (srv && nr >= srv_nr) | |
775 | continue; | |
776 | ||
777 | srv_nr = nr; | |
cca1dfdd | 778 | srv_rw = !(flags & GPT_FLAG_READ_ONLY), |
e48fdd84 | 779 | |
2fc09a9c DM |
780 | r = free_and_strdup(&srv, subnode); |
781 | if (r < 0) | |
e48fdd84 | 782 | return log_oom(); |
1a14a53c | 783 | } |
1a14a53c LP |
784 | } |
785 | ||
59512f21 KS |
786 | if (boot) { |
787 | k = add_boot(boot); | |
788 | if (k < 0) | |
789 | r = k; | |
790 | } | |
791 | ||
61331eab | 792 | if (home) { |
cca1dfdd | 793 | k = probe_and_add_mount("home", home, "/home", home_rw, "Home Partition", SPECIAL_LOCAL_FS_TARGET); |
73b80ec2 LP |
794 | if (k < 0) |
795 | r = k; | |
796 | } | |
e48fdd84 | 797 | |
61331eab | 798 | if (srv) { |
cca1dfdd | 799 | k = probe_and_add_mount("srv", srv, "/srv", srv_rw, "Server Data Partition", SPECIAL_LOCAL_FS_TARGET); |
73b80ec2 LP |
800 | if (k < 0) |
801 | r = k; | |
802 | } | |
1a14a53c | 803 | |
1a14a53c LP |
804 | return r; |
805 | } | |
806 | ||
1a14a53c LP |
807 | static int get_block_device(const char *path, dev_t *dev) { |
808 | struct stat st; | |
809 | struct statfs sfs; | |
810 | ||
811 | assert(path); | |
812 | assert(dev); | |
813 | ||
c6ba0c18 LP |
814 | /* Get's the block device directly backing a file system. If |
815 | * the block device is encrypted, returns the device mapper | |
816 | * block device. */ | |
817 | ||
e48fdd84 | 818 | if (lstat(path, &st)) |
1a14a53c LP |
819 | return -errno; |
820 | ||
821 | if (major(st.st_dev) != 0) { | |
822 | *dev = st.st_dev; | |
823 | return 1; | |
824 | } | |
825 | ||
e48fdd84 | 826 | if (statfs(path, &sfs) < 0) |
1a14a53c LP |
827 | return -errno; |
828 | ||
c51cf056 | 829 | if (F_TYPE_EQUAL(sfs.f_type, BTRFS_SUPER_MAGIC)) |
f9ac1544 | 830 | return btrfs_get_block_device(path, dev); |
1a14a53c LP |
831 | |
832 | return 0; | |
833 | } | |
834 | ||
c6ba0c18 LP |
835 | static int get_block_device_harder(const char *path, dev_t *dev) { |
836 | _cleanup_closedir_ DIR *d = NULL; | |
837 | _cleanup_free_ char *p = NULL, *t = NULL; | |
838 | struct dirent *de, *found = NULL; | |
839 | const char *q; | |
840 | unsigned maj, min; | |
841 | dev_t dt; | |
842 | int r; | |
843 | ||
844 | assert(path); | |
845 | assert(dev); | |
846 | ||
847 | /* Gets the backing block device for a file system, and | |
848 | * handles LUKS encrypted file systems, looking for its | |
849 | * immediate parent, if there is one. */ | |
850 | ||
851 | r = get_block_device(path, &dt); | |
852 | if (r <= 0) | |
853 | return r; | |
854 | ||
855 | if (asprintf(&p, "/sys/dev/block/%u:%u/slaves", major(dt), minor(dt)) < 0) | |
856 | return -ENOMEM; | |
857 | ||
858 | d = opendir(p); | |
859 | if (!d) { | |
860 | if (errno == ENOENT) | |
861 | goto fallback; | |
862 | ||
863 | return -errno; | |
864 | } | |
865 | ||
866 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
867 | ||
868 | if (STR_IN_SET(de->d_name, ".", "..")) | |
869 | continue; | |
870 | ||
871 | if (!IN_SET(de->d_type, DT_LNK, DT_UNKNOWN)) | |
872 | continue; | |
873 | ||
874 | if (found) /* Don't try to support multiple backing block devices */ | |
875 | goto fallback; | |
876 | ||
877 | found = de; | |
c6ba0c18 LP |
878 | } |
879 | ||
880 | if (!found) | |
881 | goto fallback; | |
882 | ||
883 | q = strjoina(p, "/", found->d_name, "/dev"); | |
884 | ||
885 | r = read_one_line_file(q, &t); | |
886 | if (r == -ENOENT) | |
887 | goto fallback; | |
888 | if (r < 0) | |
889 | return r; | |
890 | ||
891 | if (sscanf(t, "%u:%u", &maj, &min) != 2) | |
892 | return -EINVAL; | |
893 | ||
894 | if (maj == 0) | |
895 | goto fallback; | |
896 | ||
897 | *dev = makedev(maj, min); | |
898 | return 1; | |
899 | ||
900 | fallback: | |
901 | *dev = dt; | |
902 | return 1; | |
903 | } | |
904 | ||
73b80ec2 LP |
905 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
906 | int r; | |
1a14a53c | 907 | |
73b80ec2 | 908 | assert(key); |
1a14a53c | 909 | |
73b80ec2 | 910 | if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto") && value) { |
1a14a53c | 911 | |
73b80ec2 LP |
912 | r = parse_boolean(value); |
913 | if (r < 0) | |
d2a62382 | 914 | log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value); |
8086ffac ZJS |
915 | else |
916 | arg_enabled = r; | |
1a14a53c | 917 | |
73b80ec2 LP |
918 | } else if (streq(key, "root") && value) { |
919 | ||
920 | /* Disable root disk logic if there's a root= value | |
921 | * specified (unless it happens to be "gpt-auto") */ | |
922 | ||
923 | arg_root_enabled = streq(value, "gpt-auto"); | |
924 | ||
925 | } else if (streq(key, "rw") && !value) | |
926 | arg_root_rw = true; | |
927 | else if (streq(key, "ro") && !value) | |
928 | arg_root_rw = false; | |
73b80ec2 LP |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
933 | static int add_root_mount(void) { | |
934 | ||
935 | #ifdef ENABLE_EFI | |
936 | int r; | |
937 | ||
938 | if (!is_efi_boot()) { | |
939 | log_debug("Not a EFI boot, not creating root mount."); | |
940 | return 0; | |
9a5cb137 ZJS |
941 | } |
942 | ||
73b80ec2 LP |
943 | r = efi_loader_get_device_part_uuid(NULL); |
944 | if (r == -ENOENT) { | |
945 | log_debug("EFI loader partition unknown, exiting."); | |
946 | return 0; | |
23bbb0de MS |
947 | } else if (r < 0) |
948 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
1a14a53c | 949 | |
73b80ec2 LP |
950 | /* OK, we have an ESP partition, this is fantastic, so let's |
951 | * wait for a root device to show up. A udev rule will create | |
952 | * the link for us under the right name. */ | |
953 | ||
954 | return add_mount( | |
955 | "root", | |
98b2f766 | 956 | "/dev/gpt-auto-root", |
73b80ec2 LP |
957 | in_initrd() ? "/sysroot" : "/", |
958 | NULL, | |
cca1dfdd | 959 | arg_root_rw, |
59512f21 | 960 | NULL, |
73b80ec2 LP |
961 | "Root Partition", |
962 | in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET); | |
963 | #else | |
964 | return 0; | |
965 | #endif | |
966 | } | |
967 | ||
968 | static int add_mounts(void) { | |
73b80ec2 LP |
969 | dev_t devno; |
970 | int r; | |
971 | ||
c6ba0c18 | 972 | r = get_block_device_harder("/", &devno); |
23bbb0de MS |
973 | if (r < 0) |
974 | return log_error_errno(r, "Failed to determine block device of root file system: %m"); | |
975 | else if (r == 0) { | |
c6ba0c18 | 976 | r = get_block_device_harder("/usr", &devno); |
eafe88e3 TH |
977 | if (r < 0) |
978 | return log_error_errno(r, "Failed to determine block device of /usr file system: %m"); | |
979 | else if (r == 0) { | |
980 | log_debug("Neither root nor /usr file system are on a (single) block device."); | |
981 | return 0; | |
982 | } | |
3db604b9 LP |
983 | } |
984 | ||
61331eab | 985 | return enumerate_partitions(devno); |
73b80ec2 LP |
986 | } |
987 | ||
988 | int main(int argc, char *argv[]) { | |
989 | int r = 0; | |
990 | ||
991 | if (argc > 1 && argc != 4) { | |
992 | log_error("This program takes three or no arguments."); | |
993 | return EXIT_FAILURE; | |
994 | } | |
995 | ||
996 | if (argc > 1) | |
997 | arg_dest = argv[3]; | |
998 | ||
999 | log_set_target(LOG_TARGET_SAFE); | |
1000 | log_parse_environment(); | |
1001 | log_open(); | |
1002 | ||
1003 | umask(0022); | |
1004 | ||
75f86906 | 1005 | if (detect_container() > 0) { |
73b80ec2 | 1006 | log_debug("In a container, exiting."); |
e48fdd84 | 1007 | return EXIT_SUCCESS; |
1a14a53c | 1008 | } |
3db604b9 | 1009 | |
b5884878 LP |
1010 | r = parse_proc_cmdline(parse_proc_cmdline_item); |
1011 | if (r < 0) | |
da927ba9 | 1012 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
1a14a53c | 1013 | |
73b80ec2 LP |
1014 | if (!arg_enabled) { |
1015 | log_debug("Disabled, exiting."); | |
1016 | return EXIT_SUCCESS; | |
1017 | } | |
1018 | ||
1019 | if (arg_root_enabled) | |
1020 | r = add_root_mount(); | |
1021 | ||
1022 | if (!in_initrd()) { | |
1023 | int k; | |
1024 | ||
1025 | k = add_mounts(); | |
1026 | if (k < 0) | |
1027 | r = k; | |
1028 | } | |
1029 | ||
1030 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1a14a53c | 1031 | } |