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Commit | Line | Data |
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1a14a53c LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
6b5cf3ea | 20 | #include <blkid.h> |
1a14a53c | 21 | #include <stdlib.h> |
1a14a53c | 22 | #include <sys/statfs.h> |
cf0fbc49 | 23 | #include <unistd.h> |
1a14a53c | 24 | |
b4bbcaa9 | 25 | #include "libudev.h" |
07630cea LP |
26 | #include "sd-id128.h" |
27 | ||
b5efdb8a | 28 | #include "alloc-util.h" |
07630cea LP |
29 | #include "blkid-util.h" |
30 | #include "btrfs-util.h" | |
a0956174 | 31 | #include "dirent-util.h" |
72e18a98 | 32 | #include "dissect-image.h" |
07630cea | 33 | #include "efivars.h" |
3ffd4af2 | 34 | #include "fd-util.h" |
07630cea LP |
35 | #include "fileio.h" |
36 | #include "fstab-util.h" | |
37 | #include "generator.h" | |
38 | #include "gpt.h" | |
1a14a53c | 39 | #include "missing.h" |
07630cea | 40 | #include "mkdir.h" |
4349cd7c | 41 | #include "mount-util.h" |
6bedfcbb | 42 | #include "parse-util.h" |
07630cea | 43 | #include "path-util.h" |
4e731273 | 44 | #include "proc-cmdline.h" |
1a14a53c | 45 | #include "special.h" |
8fcde012 | 46 | #include "stat-util.h" |
07630cea LP |
47 | #include "string-util.h" |
48 | #include "udev-util.h" | |
1a14a53c | 49 | #include "unit-name.h" |
07630cea | 50 | #include "util.h" |
9a5cb137 | 51 | #include "virt.h" |
1a14a53c | 52 | |
1a14a53c | 53 | static const char *arg_dest = "/tmp"; |
73b80ec2 LP |
54 | static bool arg_enabled = true; |
55 | static bool arg_root_enabled = true; | |
56 | static bool arg_root_rw = false; | |
1a14a53c | 57 | |
01af8c01 | 58 | static int add_cryptsetup(const char *id, const char *what, bool rw, bool require, char **device) { |
ac097c84 | 59 | _cleanup_free_ char *e = NULL, *n = NULL, *p = NULL, *d = NULL; |
1af72119 | 60 | _cleanup_fclose_ FILE *f = NULL; |
9cdcf368 | 61 | char *ret; |
1af72119 LP |
62 | int r; |
63 | ||
64 | assert(id); | |
65 | assert(what); | |
1af72119 | 66 | |
7410616c LP |
67 | r = unit_name_from_path(what, ".device", &d); |
68 | if (r < 0) | |
69 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
70 | |
71 | e = unit_name_escape(id); | |
72 | if (!e) | |
73 | return log_oom(); | |
74 | ||
7410616c LP |
75 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
76 | if (r < 0) | |
77 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 | 78 | |
605405c6 | 79 | p = strjoin(arg_dest, "/", n); |
821b2e79 | 80 | if (!p) |
1af72119 LP |
81 | return log_oom(); |
82 | ||
83 | f = fopen(p, "wxe"); | |
4a62c710 MS |
84 | if (!f) |
85 | return log_error_errno(errno, "Failed to create unit file %s: %m", p); | |
1af72119 LP |
86 | |
87 | fprintf(f, | |
88 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
89 | "[Unit]\n" | |
90 | "Description=Cryptography Setup for %%I\n" | |
c3834f9b | 91 | "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n" |
1af72119 LP |
92 | "DefaultDependencies=no\n" |
93 | "Conflicts=umount.target\n" | |
94 | "BindsTo=dev-mapper-%%i.device %s\n" | |
95 | "Before=umount.target cryptsetup.target\n" | |
96 | "After=%s\n" | |
97 | "IgnoreOnIsolate=true\n" | |
1af72119 LP |
98 | "[Service]\n" |
99 | "Type=oneshot\n" | |
100 | "RemainAfterExit=yes\n" | |
101 | "TimeoutSec=0\n" /* the binary handles timeouts anyway */ | |
0b1f68ac | 102 | "KeyringMode=shared\n" /* make sure we can share cached keys among instances */ |
cca1dfdd | 103 | "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n" |
1af72119 LP |
104 | "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", |
105 | d, d, | |
cca1dfdd | 106 | id, what, rw ? "" : "read-only", |
1af72119 LP |
107 | id); |
108 | ||
dacd6cee LP |
109 | r = fflush_and_check(f); |
110 | if (r < 0) | |
111 | return log_error_errno(r, "Failed to write file %s: %m", p); | |
1af72119 | 112 | |
9cdcf368 ZJS |
113 | r = generator_add_symlink(arg_dest, d, "wants", n); |
114 | if (r < 0) | |
115 | return r; | |
1af72119 | 116 | |
01af8c01 | 117 | if (require) { |
9cdcf368 | 118 | const char *dmname; |
1af72119 | 119 | |
9cdcf368 ZJS |
120 | r = generator_add_symlink(arg_dest, "cryptsetup.target", "requires", n); |
121 | if (r < 0) | |
122 | return r; | |
01af8c01 | 123 | |
9cdcf368 ZJS |
124 | dmname = strjoina("dev-mapper-", e, ".device"); |
125 | r = generator_add_symlink(arg_dest, dmname, "requires", n); | |
126 | if (r < 0) | |
127 | return r; | |
01af8c01 | 128 | } |
1af72119 LP |
129 | |
130 | free(p); | |
605405c6 | 131 | p = strjoin(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf"); |
1af72119 LP |
132 | if (!p) |
133 | return log_oom(); | |
134 | ||
135 | mkdir_parents_label(p, 0755); | |
136 | r = write_string_file(p, | |
137 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
138 | "[Unit]\n" | |
4c1fc3e4 DM |
139 | "JobTimeoutSec=0\n", |
140 | WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */ | |
23bbb0de MS |
141 | if (r < 0) |
142 | return log_error_errno(r, "Failed to write device drop-in: %m"); | |
1af72119 LP |
143 | |
144 | ret = strappend("/dev/mapper/", id); | |
145 | if (!ret) | |
146 | return log_oom(); | |
147 | ||
01af8c01 LP |
148 | if (device) |
149 | *device = ret; | |
1af72119 LP |
150 | return 0; |
151 | } | |
152 | ||
73b80ec2 LP |
153 | static int add_mount( |
154 | const char *id, | |
155 | const char *what, | |
156 | const char *where, | |
157 | const char *fstype, | |
cca1dfdd | 158 | bool rw, |
59512f21 | 159 | const char *options, |
73b80ec2 LP |
160 | const char *description, |
161 | const char *post) { | |
162 | ||
9cdcf368 | 163 | _cleanup_free_ char *unit = NULL, *crypto_what = NULL, *p = NULL; |
1a14a53c | 164 | _cleanup_fclose_ FILE *f = NULL; |
e48fdd84 | 165 | int r; |
1a14a53c | 166 | |
1af72119 LP |
167 | assert(id); |
168 | assert(what); | |
169 | assert(where); | |
1af72119 LP |
170 | assert(description); |
171 | ||
73b80ec2 | 172 | log_debug("Adding %s: %s %s", where, what, strna(fstype)); |
1a14a53c | 173 | |
73b80ec2 | 174 | if (streq_ptr(fstype, "crypto_LUKS")) { |
1af72119 | 175 | |
01af8c01 | 176 | r = add_cryptsetup(id, what, rw, true, &crypto_what); |
1af72119 LP |
177 | if (r < 0) |
178 | return r; | |
179 | ||
180 | what = crypto_what; | |
181 | fstype = NULL; | |
182 | } | |
183 | ||
7410616c LP |
184 | r = unit_name_from_path(where, ".mount", &unit); |
185 | if (r < 0) | |
186 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1a14a53c | 187 | |
605405c6 | 188 | p = strjoin(arg_dest, "/", unit); |
e48fdd84 LP |
189 | if (!p) |
190 | return log_oom(); | |
191 | ||
192 | f = fopen(p, "wxe"); | |
4a62c710 MS |
193 | if (!f) |
194 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
1a14a53c LP |
195 | |
196 | fprintf(f, | |
197 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
198 | "[Unit]\n" | |
c3834f9b LP |
199 | "Description=%s\n" |
200 | "Documentation=man:systemd-gpt-auto-generator(8)\n", | |
e48fdd84 LP |
201 | description); |
202 | ||
73b80ec2 LP |
203 | if (post) |
204 | fprintf(f, "Before=%s\n", post); | |
205 | ||
e48fdd84 LP |
206 | r = generator_write_fsck_deps(f, arg_dest, what, where, fstype); |
207 | if (r < 0) | |
208 | return r; | |
209 | ||
210 | fprintf(f, | |
211 | "\n" | |
1a14a53c LP |
212 | "[Mount]\n" |
213 | "What=%s\n" | |
1af72119 LP |
214 | "Where=%s\n", |
215 | what, where); | |
216 | ||
73b80ec2 LP |
217 | if (fstype) |
218 | fprintf(f, "Type=%s\n", fstype); | |
219 | ||
59512f21 KS |
220 | if (options) |
221 | fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); | |
222 | else | |
223 | fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); | |
1a14a53c | 224 | |
dacd6cee LP |
225 | r = fflush_and_check(f); |
226 | if (r < 0) | |
227 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
1a14a53c | 228 | |
9cdcf368 ZJS |
229 | if (post) |
230 | return generator_add_symlink(arg_dest, post, "requires", unit); | |
1a14a53c LP |
231 | return 0; |
232 | } | |
233 | ||
59512f21 KS |
234 | static bool path_is_busy(const char *where) { |
235 | int r; | |
236 | ||
237 | /* already a mountpoint; generators run during reload */ | |
e1873695 | 238 | r = path_is_mount_point(where, NULL, AT_SYMLINK_FOLLOW); |
59512f21 KS |
239 | if (r > 0) |
240 | return false; | |
241 | ||
242 | /* the directory might not exist on a stateless system */ | |
243 | if (r == -ENOENT) | |
244 | return false; | |
245 | ||
246 | if (r < 0) | |
247 | return true; | |
248 | ||
249 | /* not a mountpoint but it contains files */ | |
250 | if (dir_is_empty(where) <= 0) | |
251 | return true; | |
252 | ||
253 | return false; | |
254 | } | |
255 | ||
72e18a98 LP |
256 | static int add_partition_mount( |
257 | DissectedPartition *p, | |
61331eab | 258 | const char *id, |
61331eab | 259 | const char *where, |
72e18a98 | 260 | const char *description) { |
61331eab | 261 | |
72e18a98 | 262 | assert(p); |
61331eab | 263 | |
59512f21 | 264 | if (path_is_busy(where)) { |
61331eab LP |
265 | log_debug("%s already populated, ignoring.", where); |
266 | return 0; | |
267 | } | |
268 | ||
61331eab LP |
269 | return add_mount( |
270 | id, | |
72e18a98 | 271 | p->node, |
61331eab | 272 | where, |
72e18a98 LP |
273 | p->fstype, |
274 | p->rw, | |
59512f21 | 275 | NULL, |
61331eab | 276 | description, |
72e18a98 | 277 | SPECIAL_LOCAL_FS_TARGET); |
61331eab LP |
278 | } |
279 | ||
59512f21 | 280 | static int add_swap(const char *path) { |
9cdcf368 | 281 | _cleanup_free_ char *name = NULL, *unit = NULL; |
59512f21 KS |
282 | _cleanup_fclose_ FILE *f = NULL; |
283 | int r; | |
284 | ||
285 | assert(path); | |
286 | ||
fc5bc384 FB |
287 | /* Disable the swap auto logic if at least one swap is defined in /etc/fstab, see #6192. */ |
288 | r = fstab_has_fstype("swap"); | |
289 | if (r < 0) | |
290 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
1a680ae3 | 291 | if (r > 0) { |
fc5bc384 FB |
292 | log_debug("swap specified in fstab, ignoring."); |
293 | return 0; | |
294 | } | |
295 | ||
59512f21 KS |
296 | log_debug("Adding swap: %s", path); |
297 | ||
298 | r = unit_name_from_path(path, ".swap", &name); | |
299 | if (r < 0) | |
300 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
301 | ||
605405c6 | 302 | unit = strjoin(arg_dest, "/", name); |
59512f21 KS |
303 | if (!unit) |
304 | return log_oom(); | |
305 | ||
306 | f = fopen(unit, "wxe"); | |
307 | if (!f) | |
308 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
309 | ||
310 | fprintf(f, | |
311 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
312 | "[Unit]\n" | |
313 | "Description=Swap Partition\n" | |
314 | "Documentation=man:systemd-gpt-auto-generator(8)\n\n" | |
315 | "[Swap]\n" | |
316 | "What=%s\n", | |
317 | path); | |
318 | ||
dacd6cee LP |
319 | r = fflush_and_check(f); |
320 | if (r < 0) | |
321 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
59512f21 | 322 | |
9cdcf368 | 323 | return generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, "wants", name); |
59512f21 KS |
324 | } |
325 | ||
349cc4a5 | 326 | #if ENABLE_EFI |
7a1494aa TG |
327 | static int add_automount( |
328 | const char *id, | |
329 | const char *what, | |
330 | const char *where, | |
331 | const char *fstype, | |
332 | bool rw, | |
333 | const char *options, | |
334 | const char *description, | |
335 | usec_t timeout) { | |
336 | ||
9cdcf368 | 337 | _cleanup_free_ char *unit = NULL; |
7a1494aa TG |
338 | _cleanup_free_ char *opt, *p = NULL; |
339 | _cleanup_fclose_ FILE *f = NULL; | |
340 | int r; | |
341 | ||
342 | assert(id); | |
343 | assert(where); | |
344 | assert(description); | |
345 | ||
346 | if (options) | |
605405c6 | 347 | opt = strjoin(options, ",noauto"); |
7a1494aa TG |
348 | else |
349 | opt = strdup("noauto"); | |
350 | if (!opt) | |
351 | return log_oom(); | |
352 | ||
353 | r = add_mount(id, | |
354 | what, | |
355 | where, | |
356 | fstype, | |
357 | rw, | |
358 | opt, | |
359 | description, | |
360 | NULL); | |
361 | if (r < 0) | |
362 | return r; | |
363 | ||
364 | r = unit_name_from_path(where, ".automount", &unit); | |
365 | if (r < 0) | |
366 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
367 | ||
605405c6 | 368 | p = strjoin(arg_dest, "/", unit); |
7a1494aa TG |
369 | if (!p) |
370 | return log_oom(); | |
371 | ||
372 | f = fopen(p, "wxe"); | |
373 | if (!f) | |
374 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
375 | ||
376 | fprintf(f, | |
377 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
378 | "[Unit]\n" | |
379 | "Description=%s\n" | |
380 | "Documentation=man:systemd-gpt-auto-generator(8)\n" | |
381 | "[Automount]\n" | |
382 | "Where=%s\n" | |
70887c5f | 383 | "TimeoutIdleSec="USEC_FMT"\n", |
7a1494aa TG |
384 | description, |
385 | where, | |
70887c5f | 386 | timeout / USEC_PER_SEC); |
7a1494aa TG |
387 | |
388 | r = fflush_and_check(f); | |
389 | if (r < 0) | |
390 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
391 | ||
9cdcf368 | 392 | return generator_add_symlink(arg_dest, SPECIAL_LOCAL_FS_TARGET, "wants", unit); |
7a1494aa TG |
393 | } |
394 | ||
72e18a98 | 395 | static int add_esp(DissectedPartition *p) { |
b52a109a | 396 | const char *esp; |
59512f21 KS |
397 | int r; |
398 | ||
72e18a98 | 399 | assert(p); |
59512f21 | 400 | |
59512f21 | 401 | if (in_initrd()) { |
b52a109a | 402 | log_debug("In initrd, ignoring the ESP."); |
59512f21 KS |
403 | return 0; |
404 | } | |
405 | ||
b52a109a LP |
406 | /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice */ |
407 | esp = access("/efi/", F_OK) >= 0 ? "/efi" : "/boot"; | |
59512f21 | 408 | |
0b6b6787 | 409 | /* We create an .automount which is not overridden by the .mount from the fstab generator. */ |
b9088048 FB |
410 | r = fstab_is_mount_point(esp); |
411 | if (r < 0) | |
412 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
39b6a511 | 413 | if (r > 0) { |
b52a109a | 414 | log_debug("%s specified in fstab, ignoring.", esp); |
59512f21 KS |
415 | return 0; |
416 | } | |
417 | ||
b52a109a LP |
418 | if (path_is_busy(esp)) { |
419 | log_debug("%s already populated, ignoring.", esp); | |
59512f21 KS |
420 | return 0; |
421 | } | |
422 | ||
7ba25ab5 | 423 | if (is_efi_boot()) { |
72e18a98 | 424 | sd_id128_t loader_uuid; |
59512f21 | 425 | |
7ba25ab5 | 426 | /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */ |
59512f21 | 427 | |
7ba25ab5 LP |
428 | r = efi_loader_get_device_part_uuid(&loader_uuid); |
429 | if (r == -ENOENT) { | |
430 | log_debug("EFI loader partition unknown."); | |
431 | return 0; | |
432 | } | |
e28973ee ZJS |
433 | if (r < 0) |
434 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
7ba25ab5 | 435 | |
72e18a98 | 436 | if (!sd_id128_equal(p->uuid, loader_uuid)) { |
7ba25ab5 LP |
437 | log_debug("Partition for %s does not appear to be the partition we are booted from.", esp); |
438 | return 0; | |
439 | } | |
440 | } else | |
441 | log_debug("Not an EFI boot, skipping ESP check."); | |
442 | ||
443 | return add_automount("boot", | |
72e18a98 LP |
444 | p->node, |
445 | esp, | |
446 | p->fstype, | |
447 | true, | |
448 | "umask=0077", | |
449 | "EFI System Partition Automount", | |
450 | 120 * USEC_PER_SEC); | |
7a1494aa | 451 | } |
59512f21 | 452 | #else |
d97beb0e | 453 | static int add_esp(DissectedPartition *p) { |
59512f21 | 454 | return 0; |
59512f21 | 455 | } |
7a1494aa | 456 | #endif |
59512f21 | 457 | |
72e18a98 | 458 | static int open_parent(dev_t devnum, int *ret) { |
1ca208fb | 459 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; |
61331eab | 460 | _cleanup_udev_unref_ struct udev *udev = NULL; |
72e18a98 LP |
461 | const char *name, *devtype, *node; |
462 | struct udev_device *parent; | |
61331eab | 463 | dev_t pn; |
72e18a98 LP |
464 | int fd; |
465 | ||
466 | assert(ret); | |
1a14a53c | 467 | |
61331eab LP |
468 | udev = udev_new(); |
469 | if (!udev) | |
b47d419c | 470 | return log_oom(); |
1a14a53c | 471 | |
61331eab | 472 | d = udev_device_new_from_devnum(udev, 'b', devnum); |
1ca208fb ZJS |
473 | if (!d) |
474 | return log_oom(); | |
1a14a53c | 475 | |
d2a62382 ZJS |
476 | name = udev_device_get_devnode(d); |
477 | if (!name) | |
478 | name = udev_device_get_syspath(d); | |
479 | if (!name) { | |
72e18a98 LP |
480 | log_debug("Device %u:%u does not have a name, ignoring.", major(devnum), minor(devnum)); |
481 | goto not_found; | |
d2a62382 ZJS |
482 | } |
483 | ||
1a14a53c | 484 | parent = udev_device_get_parent(d); |
fa041593 | 485 | if (!parent) { |
d2a62382 | 486 | log_debug("%s: not a partitioned device, ignoring.", name); |
72e18a98 | 487 | goto not_found; |
fa041593 | 488 | } |
1a14a53c | 489 | |
61331eab LP |
490 | /* Does it have a devtype? */ |
491 | devtype = udev_device_get_devtype(parent); | |
fa041593 | 492 | if (!devtype) { |
d2a62382 | 493 | log_debug("%s: parent doesn't have a device type, ignoring.", name); |
72e18a98 | 494 | goto not_found; |
fa041593 | 495 | } |
61331eab LP |
496 | |
497 | /* Is this a disk or a partition? We only care for disks... */ | |
fa041593 | 498 | if (!streq(devtype, "disk")) { |
d2a62382 | 499 | log_debug("%s: parent isn't a raw disk, ignoring.", name); |
72e18a98 | 500 | goto not_found; |
fa041593 | 501 | } |
61331eab LP |
502 | |
503 | /* Does it have a device node? */ | |
504 | node = udev_device_get_devnode(parent); | |
fa041593 | 505 | if (!node) { |
d2a62382 | 506 | log_debug("%s: parent device does not have device node, ignoring.", name); |
72e18a98 | 507 | goto not_found; |
fa041593 | 508 | } |
61331eab | 509 | |
d2a62382 | 510 | log_debug("%s: root device %s.", name, node); |
61331eab LP |
511 | |
512 | pn = udev_device_get_devnum(parent); | |
72e18a98 LP |
513 | if (major(pn) == 0) { |
514 | log_debug("%s: parent device is not a proper block device, ignoring.", name); | |
515 | goto not_found; | |
61331eab LP |
516 | } |
517 | ||
72e18a98 LP |
518 | fd = open(node, O_RDONLY|O_CLOEXEC|O_NOCTTY); |
519 | if (fd < 0) | |
520 | return log_error_errno(errno, "Failed to open %s: %m", node); | |
61331eab | 521 | |
72e18a98 LP |
522 | *ret = fd; |
523 | return 1; | |
61331eab | 524 | |
72e18a98 LP |
525 | not_found: |
526 | *ret = -1; | |
527 | return 0; | |
528 | } | |
cb971249 | 529 | |
72e18a98 | 530 | static int enumerate_partitions(dev_t devnum) { |
61331eab | 531 | |
72e18a98 LP |
532 | _cleanup_close_ int fd = -1; |
533 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
534 | int r, k; | |
61331eab | 535 | |
72e18a98 LP |
536 | r = open_parent(devnum, &fd); |
537 | if (r <= 0) | |
538 | return r; | |
61331eab | 539 | |
72e18a98 LP |
540 | r = dissect_image(fd, NULL, 0, DISSECT_IMAGE_GPT_ONLY, &m); |
541 | if (r == -ENOPKG) { | |
542 | log_debug_errno(r, "No suitable partition table found, ignoring."); | |
543 | return 0; | |
61331eab | 544 | } |
23bbb0de | 545 | if (r < 0) |
72e18a98 | 546 | return log_error_errno(r, "Failed to dissect: %m"); |
0238d4c6 | 547 | |
72e18a98 LP |
548 | if (m->partitions[PARTITION_SWAP].found) { |
549 | k = add_swap(m->partitions[PARTITION_SWAP].node); | |
550 | if (k < 0) | |
551 | r = k; | |
1a14a53c LP |
552 | } |
553 | ||
72e18a98 LP |
554 | if (m->partitions[PARTITION_ESP].found) { |
555 | k = add_esp(m->partitions + PARTITION_ESP); | |
59512f21 KS |
556 | if (k < 0) |
557 | r = k; | |
558 | } | |
559 | ||
72e18a98 LP |
560 | if (m->partitions[PARTITION_HOME].found) { |
561 | k = add_partition_mount(m->partitions + PARTITION_HOME, "home", "/home", "Home Partition"); | |
73b80ec2 LP |
562 | if (k < 0) |
563 | r = k; | |
564 | } | |
e48fdd84 | 565 | |
72e18a98 LP |
566 | if (m->partitions[PARTITION_SRV].found) { |
567 | k = add_partition_mount(m->partitions + PARTITION_SRV, "srv", "/srv", "Server Data Partition"); | |
73b80ec2 LP |
568 | if (k < 0) |
569 | r = k; | |
570 | } | |
1a14a53c | 571 | |
1a14a53c LP |
572 | return r; |
573 | } | |
574 | ||
96287a49 | 575 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
73b80ec2 | 576 | int r; |
1a14a53c | 577 | |
73b80ec2 | 578 | assert(key); |
1a14a53c | 579 | |
1d84ad94 | 580 | if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto")) { |
1a14a53c | 581 | |
1d84ad94 | 582 | r = value ? parse_boolean(value) : 1; |
73b80ec2 | 583 | if (r < 0) |
d2a62382 | 584 | log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value); |
8086ffac ZJS |
585 | else |
586 | arg_enabled = r; | |
1a14a53c | 587 | |
1d84ad94 LP |
588 | } else if (streq(key, "root")) { |
589 | ||
590 | if (proc_cmdline_value_missing(key, value)) | |
591 | return 0; | |
73b80ec2 LP |
592 | |
593 | /* Disable root disk logic if there's a root= value | |
594 | * specified (unless it happens to be "gpt-auto") */ | |
595 | ||
596 | arg_root_enabled = streq(value, "gpt-auto"); | |
597 | ||
2f3dfc6f LP |
598 | } else if (streq(key, "roothash")) { |
599 | ||
600 | if (proc_cmdline_value_missing(key, value)) | |
601 | return 0; | |
602 | ||
603 | /* Disable root disk logic if there's roothash= defined (i.e. verity enabled) */ | |
604 | ||
605 | arg_root_enabled = false; | |
606 | ||
73b80ec2 LP |
607 | } else if (streq(key, "rw") && !value) |
608 | arg_root_rw = true; | |
609 | else if (streq(key, "ro") && !value) | |
610 | arg_root_rw = false; | |
73b80ec2 LP |
611 | |
612 | return 0; | |
613 | } | |
614 | ||
349cc4a5 | 615 | #if ENABLE_EFI |
01af8c01 LP |
616 | static int add_root_cryptsetup(void) { |
617 | ||
618 | /* If a device /dev/gpt-auto-root-luks appears, then make it pull in systemd-cryptsetup-root.service, which | |
619 | * sets it up, and causes /dev/gpt-auto-root to appear which is all we are looking for. */ | |
620 | ||
621 | return add_cryptsetup("root", "/dev/gpt-auto-root-luks", true, false, NULL); | |
622 | } | |
623 | #endif | |
624 | ||
73b80ec2 LP |
625 | static int add_root_mount(void) { |
626 | ||
349cc4a5 | 627 | #if ENABLE_EFI |
73b80ec2 LP |
628 | int r; |
629 | ||
630 | if (!is_efi_boot()) { | |
631 | log_debug("Not a EFI boot, not creating root mount."); | |
632 | return 0; | |
9a5cb137 ZJS |
633 | } |
634 | ||
73b80ec2 LP |
635 | r = efi_loader_get_device_part_uuid(NULL); |
636 | if (r == -ENOENT) { | |
637 | log_debug("EFI loader partition unknown, exiting."); | |
638 | return 0; | |
23bbb0de MS |
639 | } else if (r < 0) |
640 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
1a14a53c | 641 | |
73b80ec2 LP |
642 | /* OK, we have an ESP partition, this is fantastic, so let's |
643 | * wait for a root device to show up. A udev rule will create | |
644 | * the link for us under the right name. */ | |
645 | ||
7163e1ca DD |
646 | if (in_initrd()) { |
647 | r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root"); | |
648 | if (r < 0) | |
649 | return 0; | |
01af8c01 LP |
650 | |
651 | r = add_root_cryptsetup(); | |
652 | if (r < 0) | |
653 | return r; | |
7163e1ca DD |
654 | } |
655 | ||
73b80ec2 LP |
656 | return add_mount( |
657 | "root", | |
98b2f766 | 658 | "/dev/gpt-auto-root", |
73b80ec2 LP |
659 | in_initrd() ? "/sysroot" : "/", |
660 | NULL, | |
cca1dfdd | 661 | arg_root_rw, |
59512f21 | 662 | NULL, |
73b80ec2 LP |
663 | "Root Partition", |
664 | in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET); | |
665 | #else | |
666 | return 0; | |
667 | #endif | |
668 | } | |
669 | ||
670 | static int add_mounts(void) { | |
73b80ec2 LP |
671 | dev_t devno; |
672 | int r; | |
673 | ||
c6ba0c18 | 674 | r = get_block_device_harder("/", &devno); |
23bbb0de MS |
675 | if (r < 0) |
676 | return log_error_errno(r, "Failed to determine block device of root file system: %m"); | |
57ab9f89 | 677 | if (r == 0) { |
c6ba0c18 | 678 | r = get_block_device_harder("/usr", &devno); |
eafe88e3 TH |
679 | if (r < 0) |
680 | return log_error_errno(r, "Failed to determine block device of /usr file system: %m"); | |
57ab9f89 | 681 | if (r == 0) { |
eafe88e3 TH |
682 | log_debug("Neither root nor /usr file system are on a (single) block device."); |
683 | return 0; | |
684 | } | |
3db604b9 LP |
685 | } |
686 | ||
61331eab | 687 | return enumerate_partitions(devno); |
73b80ec2 LP |
688 | } |
689 | ||
690 | int main(int argc, char *argv[]) { | |
8f50e86a | 691 | int r, k; |
73b80ec2 LP |
692 | |
693 | if (argc > 1 && argc != 4) { | |
694 | log_error("This program takes three or no arguments."); | |
695 | return EXIT_FAILURE; | |
696 | } | |
697 | ||
698 | if (argc > 1) | |
699 | arg_dest = argv[3]; | |
700 | ||
701 | log_set_target(LOG_TARGET_SAFE); | |
702 | log_parse_environment(); | |
703 | log_open(); | |
704 | ||
705 | umask(0022); | |
706 | ||
75f86906 | 707 | if (detect_container() > 0) { |
73b80ec2 | 708 | log_debug("In a container, exiting."); |
e48fdd84 | 709 | return EXIT_SUCCESS; |
1a14a53c | 710 | } |
3db604b9 | 711 | |
1d84ad94 | 712 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 713 | if (r < 0) |
da927ba9 | 714 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
1a14a53c | 715 | |
73b80ec2 LP |
716 | if (!arg_enabled) { |
717 | log_debug("Disabled, exiting."); | |
718 | return EXIT_SUCCESS; | |
719 | } | |
720 | ||
721 | if (arg_root_enabled) | |
722 | r = add_root_mount(); | |
8f50e86a LP |
723 | else |
724 | r = 0; | |
73b80ec2 LP |
725 | |
726 | if (!in_initrd()) { | |
73b80ec2 LP |
727 | k = add_mounts(); |
728 | if (k < 0) | |
729 | r = k; | |
730 | } | |
731 | ||
732 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1a14a53c | 733 | } |