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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
1a14a53c | 2 | |
6b5cf3ea | 3 | #include <blkid.h> |
1a14a53c | 4 | #include <stdlib.h> |
1a14a53c | 5 | #include <sys/statfs.h> |
cf0fbc49 | 6 | #include <unistd.h> |
1a14a53c | 7 | |
85624f01 | 8 | #include "sd-device.h" |
07630cea LP |
9 | #include "sd-id128.h" |
10 | ||
b5efdb8a | 11 | #include "alloc-util.h" |
07630cea | 12 | #include "blkid-util.h" |
18c528e9 | 13 | #include "blockdev-util.h" |
07630cea | 14 | #include "btrfs-util.h" |
a0956174 | 15 | #include "dirent-util.h" |
72e18a98 | 16 | #include "dissect-image.h" |
07630cea | 17 | #include "efivars.h" |
3ffd4af2 | 18 | #include "fd-util.h" |
07630cea LP |
19 | #include "fileio.h" |
20 | #include "fstab-util.h" | |
21 | #include "generator.h" | |
22 | #include "gpt.h" | |
1a14a53c | 23 | #include "missing.h" |
07630cea | 24 | #include "mkdir.h" |
4349cd7c | 25 | #include "mount-util.h" |
6bedfcbb | 26 | #include "parse-util.h" |
07630cea | 27 | #include "path-util.h" |
4e731273 | 28 | #include "proc-cmdline.h" |
1a14a53c | 29 | #include "special.h" |
98bad05e | 30 | #include "specifier.h" |
8fcde012 | 31 | #include "stat-util.h" |
07630cea | 32 | #include "string-util.h" |
85624f01 | 33 | #include "strv.h" |
1a14a53c | 34 | #include "unit-name.h" |
07630cea | 35 | #include "util.h" |
9a5cb137 | 36 | #include "virt.h" |
1a14a53c | 37 | |
1a14a53c | 38 | static const char *arg_dest = "/tmp"; |
73b80ec2 LP |
39 | static bool arg_enabled = true; |
40 | static bool arg_root_enabled = true; | |
41 | static bool arg_root_rw = false; | |
1a14a53c | 42 | |
01af8c01 | 43 | static int add_cryptsetup(const char *id, const char *what, bool rw, bool require, char **device) { |
2aa2860b | 44 | _cleanup_free_ char *e = NULL, *n = NULL, *d = NULL, *id_escaped = NULL, *what_escaped = NULL; |
1af72119 | 45 | _cleanup_fclose_ FILE *f = NULL; |
2aa2860b | 46 | const char *p; |
1af72119 LP |
47 | int r; |
48 | ||
49 | assert(id); | |
50 | assert(what); | |
1af72119 | 51 | |
7410616c LP |
52 | r = unit_name_from_path(what, ".device", &d); |
53 | if (r < 0) | |
54 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 LP |
55 | |
56 | e = unit_name_escape(id); | |
57 | if (!e) | |
58 | return log_oom(); | |
59 | ||
7410616c LP |
60 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
61 | if (r < 0) | |
62 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1af72119 | 63 | |
98bad05e LP |
64 | id_escaped = specifier_escape(id); |
65 | if (!id_escaped) | |
66 | return log_oom(); | |
67 | ||
68 | what_escaped = specifier_escape(what); | |
69 | if (!what_escaped) | |
70 | return log_oom(); | |
71 | ||
2aa2860b | 72 | p = strjoina(arg_dest, "/", n); |
1af72119 | 73 | f = fopen(p, "wxe"); |
4a62c710 MS |
74 | if (!f) |
75 | return log_error_errno(errno, "Failed to create unit file %s: %m", p); | |
1af72119 LP |
76 | |
77 | fprintf(f, | |
78 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
79 | "[Unit]\n" | |
80 | "Description=Cryptography Setup for %%I\n" | |
c3834f9b | 81 | "Documentation=man:systemd-gpt-auto-generator(8) man:systemd-cryptsetup@.service(8)\n" |
1af72119 LP |
82 | "DefaultDependencies=no\n" |
83 | "Conflicts=umount.target\n" | |
84 | "BindsTo=dev-mapper-%%i.device %s\n" | |
85 | "Before=umount.target cryptsetup.target\n" | |
86 | "After=%s\n" | |
87 | "IgnoreOnIsolate=true\n" | |
1af72119 LP |
88 | "[Service]\n" |
89 | "Type=oneshot\n" | |
90 | "RemainAfterExit=yes\n" | |
91 | "TimeoutSec=0\n" /* the binary handles timeouts anyway */ | |
0b1f68ac | 92 | "KeyringMode=shared\n" /* make sure we can share cached keys among instances */ |
cca1dfdd | 93 | "ExecStart=" SYSTEMD_CRYPTSETUP_PATH " attach '%s' '%s' '' '%s'\n" |
1af72119 LP |
94 | "ExecStop=" SYSTEMD_CRYPTSETUP_PATH " detach '%s'\n", |
95 | d, d, | |
98bad05e LP |
96 | id_escaped, what_escaped, rw ? "" : "read-only", |
97 | id_escaped); | |
1af72119 | 98 | |
dacd6cee LP |
99 | r = fflush_and_check(f); |
100 | if (r < 0) | |
101 | return log_error_errno(r, "Failed to write file %s: %m", p); | |
1af72119 | 102 | |
9cdcf368 ZJS |
103 | r = generator_add_symlink(arg_dest, d, "wants", n); |
104 | if (r < 0) | |
105 | return r; | |
1af72119 | 106 | |
01af8c01 | 107 | if (require) { |
9cdcf368 | 108 | const char *dmname; |
1af72119 | 109 | |
9cdcf368 ZJS |
110 | r = generator_add_symlink(arg_dest, "cryptsetup.target", "requires", n); |
111 | if (r < 0) | |
112 | return r; | |
01af8c01 | 113 | |
9cdcf368 ZJS |
114 | dmname = strjoina("dev-mapper-", e, ".device"); |
115 | r = generator_add_symlink(arg_dest, dmname, "requires", n); | |
116 | if (r < 0) | |
117 | return r; | |
01af8c01 | 118 | } |
1af72119 | 119 | |
2aa2860b | 120 | p = strjoina(arg_dest, "/dev-mapper-", e, ".device.d/50-job-timeout-sec-0.conf"); |
1af72119 LP |
121 | mkdir_parents_label(p, 0755); |
122 | r = write_string_file(p, | |
123 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
124 | "[Unit]\n" | |
4c1fc3e4 DM |
125 | "JobTimeoutSec=0\n", |
126 | WRITE_STRING_FILE_CREATE); /* the binary handles timeouts anyway */ | |
23bbb0de MS |
127 | if (r < 0) |
128 | return log_error_errno(r, "Failed to write device drop-in: %m"); | |
1af72119 | 129 | |
2aa2860b ZJS |
130 | if (device) { |
131 | char *ret; | |
132 | ||
133 | ret = strappend("/dev/mapper/", id); | |
134 | if (!ret) | |
135 | return log_oom(); | |
1af72119 | 136 | |
01af8c01 | 137 | *device = ret; |
2aa2860b ZJS |
138 | } |
139 | ||
1af72119 LP |
140 | return 0; |
141 | } | |
142 | ||
73b80ec2 LP |
143 | static int add_mount( |
144 | const char *id, | |
145 | const char *what, | |
146 | const char *where, | |
147 | const char *fstype, | |
cca1dfdd | 148 | bool rw, |
59512f21 | 149 | const char *options, |
73b80ec2 LP |
150 | const char *description, |
151 | const char *post) { | |
152 | ||
9cdcf368 | 153 | _cleanup_free_ char *unit = NULL, *crypto_what = NULL, *p = NULL; |
1a14a53c | 154 | _cleanup_fclose_ FILE *f = NULL; |
e48fdd84 | 155 | int r; |
1a14a53c | 156 | |
98bad05e LP |
157 | /* Note that we don't apply specifier escaping on the input strings here, since we know they are not configured |
158 | * externally, but all originate from our own sources here, and hence we know they contain no % characters that | |
159 | * could potentially be understood as specifiers. */ | |
160 | ||
1af72119 LP |
161 | assert(id); |
162 | assert(what); | |
163 | assert(where); | |
1af72119 LP |
164 | assert(description); |
165 | ||
73b80ec2 | 166 | log_debug("Adding %s: %s %s", where, what, strna(fstype)); |
1a14a53c | 167 | |
73b80ec2 | 168 | if (streq_ptr(fstype, "crypto_LUKS")) { |
1af72119 | 169 | |
01af8c01 | 170 | r = add_cryptsetup(id, what, rw, true, &crypto_what); |
1af72119 LP |
171 | if (r < 0) |
172 | return r; | |
173 | ||
174 | what = crypto_what; | |
175 | fstype = NULL; | |
176 | } | |
177 | ||
7410616c LP |
178 | r = unit_name_from_path(where, ".mount", &unit); |
179 | if (r < 0) | |
180 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
1a14a53c | 181 | |
605405c6 | 182 | p = strjoin(arg_dest, "/", unit); |
e48fdd84 LP |
183 | if (!p) |
184 | return log_oom(); | |
185 | ||
186 | f = fopen(p, "wxe"); | |
4a62c710 MS |
187 | if (!f) |
188 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
1a14a53c LP |
189 | |
190 | fprintf(f, | |
191 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
192 | "[Unit]\n" | |
c3834f9b LP |
193 | "Description=%s\n" |
194 | "Documentation=man:systemd-gpt-auto-generator(8)\n", | |
e48fdd84 LP |
195 | description); |
196 | ||
73b80ec2 LP |
197 | if (post) |
198 | fprintf(f, "Before=%s\n", post); | |
199 | ||
e48fdd84 LP |
200 | r = generator_write_fsck_deps(f, arg_dest, what, where, fstype); |
201 | if (r < 0) | |
202 | return r; | |
203 | ||
204 | fprintf(f, | |
205 | "\n" | |
1a14a53c LP |
206 | "[Mount]\n" |
207 | "What=%s\n" | |
1af72119 LP |
208 | "Where=%s\n", |
209 | what, where); | |
210 | ||
73b80ec2 LP |
211 | if (fstype) |
212 | fprintf(f, "Type=%s\n", fstype); | |
213 | ||
59512f21 KS |
214 | if (options) |
215 | fprintf(f, "Options=%s,%s\n", options, rw ? "rw" : "ro"); | |
216 | else | |
217 | fprintf(f, "Options=%s\n", rw ? "rw" : "ro"); | |
1a14a53c | 218 | |
dacd6cee LP |
219 | r = fflush_and_check(f); |
220 | if (r < 0) | |
221 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
1a14a53c | 222 | |
9cdcf368 ZJS |
223 | if (post) |
224 | return generator_add_symlink(arg_dest, post, "requires", unit); | |
1a14a53c LP |
225 | return 0; |
226 | } | |
227 | ||
e137880b | 228 | static int path_is_busy(const char *where) { |
59512f21 KS |
229 | int r; |
230 | ||
231 | /* already a mountpoint; generators run during reload */ | |
e1873695 | 232 | r = path_is_mount_point(where, NULL, AT_SYMLINK_FOLLOW); |
59512f21 KS |
233 | if (r > 0) |
234 | return false; | |
235 | ||
236 | /* the directory might not exist on a stateless system */ | |
237 | if (r == -ENOENT) | |
238 | return false; | |
239 | ||
240 | if (r < 0) | |
e137880b | 241 | return log_warning_errno(r, "Cannot check if \"%s\" is a mount point: %m", where); |
59512f21 KS |
242 | |
243 | /* not a mountpoint but it contains files */ | |
e137880b ZJS |
244 | r = dir_is_empty(where); |
245 | if (r < 0) | |
246 | return log_warning_errno(r, "Cannot check if \"%s\" is empty: %m", where); | |
247 | if (r > 0) | |
248 | return false; | |
59512f21 | 249 | |
e137880b ZJS |
250 | log_debug("\"%s\" already populated, ignoring.", where); |
251 | return true; | |
59512f21 KS |
252 | } |
253 | ||
72e18a98 LP |
254 | static int add_partition_mount( |
255 | DissectedPartition *p, | |
61331eab | 256 | const char *id, |
61331eab | 257 | const char *where, |
72e18a98 | 258 | const char *description) { |
61331eab | 259 | |
e137880b | 260 | int r; |
72e18a98 | 261 | assert(p); |
61331eab | 262 | |
e137880b ZJS |
263 | r = path_is_busy(where); |
264 | if (r != 0) | |
265 | return r < 0 ? r : 0; | |
61331eab | 266 | |
61331eab LP |
267 | return add_mount( |
268 | id, | |
72e18a98 | 269 | p->node, |
61331eab | 270 | where, |
72e18a98 LP |
271 | p->fstype, |
272 | p->rw, | |
59512f21 | 273 | NULL, |
61331eab | 274 | description, |
72e18a98 | 275 | SPECIAL_LOCAL_FS_TARGET); |
61331eab LP |
276 | } |
277 | ||
59512f21 | 278 | static int add_swap(const char *path) { |
9cdcf368 | 279 | _cleanup_free_ char *name = NULL, *unit = NULL; |
59512f21 KS |
280 | _cleanup_fclose_ FILE *f = NULL; |
281 | int r; | |
282 | ||
283 | assert(path); | |
284 | ||
fc5bc384 FB |
285 | /* Disable the swap auto logic if at least one swap is defined in /etc/fstab, see #6192. */ |
286 | r = fstab_has_fstype("swap"); | |
287 | if (r < 0) | |
288 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
1a680ae3 | 289 | if (r > 0) { |
fc5bc384 FB |
290 | log_debug("swap specified in fstab, ignoring."); |
291 | return 0; | |
292 | } | |
293 | ||
59512f21 KS |
294 | log_debug("Adding swap: %s", path); |
295 | ||
296 | r = unit_name_from_path(path, ".swap", &name); | |
297 | if (r < 0) | |
298 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
299 | ||
605405c6 | 300 | unit = strjoin(arg_dest, "/", name); |
59512f21 KS |
301 | if (!unit) |
302 | return log_oom(); | |
303 | ||
304 | f = fopen(unit, "wxe"); | |
305 | if (!f) | |
306 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
307 | ||
308 | fprintf(f, | |
309 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
310 | "[Unit]\n" | |
311 | "Description=Swap Partition\n" | |
312 | "Documentation=man:systemd-gpt-auto-generator(8)\n\n" | |
313 | "[Swap]\n" | |
314 | "What=%s\n", | |
315 | path); | |
316 | ||
dacd6cee LP |
317 | r = fflush_and_check(f); |
318 | if (r < 0) | |
319 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
59512f21 | 320 | |
9cdcf368 | 321 | return generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, "wants", name); |
59512f21 KS |
322 | } |
323 | ||
349cc4a5 | 324 | #if ENABLE_EFI |
7a1494aa TG |
325 | static int add_automount( |
326 | const char *id, | |
327 | const char *what, | |
328 | const char *where, | |
329 | const char *fstype, | |
330 | bool rw, | |
331 | const char *options, | |
332 | const char *description, | |
333 | usec_t timeout) { | |
334 | ||
9cdcf368 | 335 | _cleanup_free_ char *unit = NULL; |
7a1494aa | 336 | _cleanup_fclose_ FILE *f = NULL; |
2aa2860b | 337 | const char *opt = "noauto", *p; |
7a1494aa TG |
338 | int r; |
339 | ||
340 | assert(id); | |
341 | assert(where); | |
342 | assert(description); | |
343 | ||
344 | if (options) | |
2aa2860b | 345 | opt = strjoina(options, ",", opt); |
7a1494aa TG |
346 | |
347 | r = add_mount(id, | |
348 | what, | |
349 | where, | |
350 | fstype, | |
351 | rw, | |
352 | opt, | |
353 | description, | |
354 | NULL); | |
355 | if (r < 0) | |
356 | return r; | |
357 | ||
358 | r = unit_name_from_path(where, ".automount", &unit); | |
359 | if (r < 0) | |
360 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
361 | ||
2aa2860b | 362 | p = strjoina(arg_dest, "/", unit); |
7a1494aa TG |
363 | f = fopen(p, "wxe"); |
364 | if (!f) | |
365 | return log_error_errno(errno, "Failed to create unit file %s: %m", unit); | |
366 | ||
367 | fprintf(f, | |
368 | "# Automatically generated by systemd-gpt-auto-generator\n\n" | |
369 | "[Unit]\n" | |
370 | "Description=%s\n" | |
371 | "Documentation=man:systemd-gpt-auto-generator(8)\n" | |
372 | "[Automount]\n" | |
373 | "Where=%s\n" | |
70887c5f | 374 | "TimeoutIdleSec="USEC_FMT"\n", |
7a1494aa TG |
375 | description, |
376 | where, | |
70887c5f | 377 | timeout / USEC_PER_SEC); |
7a1494aa TG |
378 | |
379 | r = fflush_and_check(f); | |
380 | if (r < 0) | |
381 | return log_error_errno(r, "Failed to write unit file %s: %m", p); | |
382 | ||
9cdcf368 | 383 | return generator_add_symlink(arg_dest, SPECIAL_LOCAL_FS_TARGET, "wants", unit); |
7a1494aa TG |
384 | } |
385 | ||
72e18a98 | 386 | static int add_esp(DissectedPartition *p) { |
b52a109a | 387 | const char *esp; |
59512f21 KS |
388 | int r; |
389 | ||
72e18a98 | 390 | assert(p); |
59512f21 | 391 | |
59512f21 | 392 | if (in_initrd()) { |
b52a109a | 393 | log_debug("In initrd, ignoring the ESP."); |
59512f21 KS |
394 | return 0; |
395 | } | |
396 | ||
b52a109a LP |
397 | /* If /efi exists we'll use that. Otherwise we'll use /boot, as that's usually the better choice */ |
398 | esp = access("/efi/", F_OK) >= 0 ? "/efi" : "/boot"; | |
59512f21 | 399 | |
0b6b6787 | 400 | /* We create an .automount which is not overridden by the .mount from the fstab generator. */ |
b9088048 FB |
401 | r = fstab_is_mount_point(esp); |
402 | if (r < 0) | |
403 | return log_error_errno(r, "Failed to parse fstab: %m"); | |
39b6a511 | 404 | if (r > 0) { |
b52a109a | 405 | log_debug("%s specified in fstab, ignoring.", esp); |
59512f21 KS |
406 | return 0; |
407 | } | |
408 | ||
e137880b ZJS |
409 | r = path_is_busy(esp); |
410 | if (r != 0) | |
411 | return r < 0 ? r : 0; | |
59512f21 | 412 | |
7ba25ab5 | 413 | if (is_efi_boot()) { |
72e18a98 | 414 | sd_id128_t loader_uuid; |
59512f21 | 415 | |
7ba25ab5 | 416 | /* If this is an EFI boot, be extra careful, and only mount the ESP if it was the ESP used for booting. */ |
59512f21 | 417 | |
7ba25ab5 LP |
418 | r = efi_loader_get_device_part_uuid(&loader_uuid); |
419 | if (r == -ENOENT) { | |
420 | log_debug("EFI loader partition unknown."); | |
421 | return 0; | |
422 | } | |
e28973ee ZJS |
423 | if (r < 0) |
424 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
7ba25ab5 | 425 | |
72e18a98 | 426 | if (!sd_id128_equal(p->uuid, loader_uuid)) { |
7ba25ab5 LP |
427 | log_debug("Partition for %s does not appear to be the partition we are booted from.", esp); |
428 | return 0; | |
429 | } | |
430 | } else | |
431 | log_debug("Not an EFI boot, skipping ESP check."); | |
432 | ||
433 | return add_automount("boot", | |
72e18a98 LP |
434 | p->node, |
435 | esp, | |
436 | p->fstype, | |
437 | true, | |
438 | "umask=0077", | |
439 | "EFI System Partition Automount", | |
440 | 120 * USEC_PER_SEC); | |
7a1494aa | 441 | } |
59512f21 | 442 | #else |
d97beb0e | 443 | static int add_esp(DissectedPartition *p) { |
59512f21 | 444 | return 0; |
59512f21 | 445 | } |
7a1494aa | 446 | #endif |
59512f21 | 447 | |
72e18a98 | 448 | static int open_parent(dev_t devnum, int *ret) { |
85624f01 | 449 | _cleanup_(sd_device_unrefp) sd_device *d = NULL; |
72e18a98 | 450 | const char *name, *devtype, *node; |
85624f01 | 451 | sd_device *parent; |
61331eab | 452 | dev_t pn; |
85624f01 | 453 | int fd, r; |
72e18a98 LP |
454 | |
455 | assert(ret); | |
1a14a53c | 456 | |
85624f01 YW |
457 | r = sd_device_new_from_devnum(&d, 'b', devnum); |
458 | if (r < 0) | |
459 | return log_debug_errno(r, "Failed to open device: %m"); | |
1a14a53c | 460 | |
85624f01 YW |
461 | if (sd_device_get_devname(d, &name) < 0) { |
462 | r = sd_device_get_syspath(d, &name); | |
463 | if (r < 0) { | |
464 | log_debug_errno(r, "Device %u:%u does not have a name, ignoring: %m", major(devnum), minor(devnum)); | |
8090b41e | 465 | return 0; |
85624f01 | 466 | } |
d2a62382 ZJS |
467 | } |
468 | ||
85624f01 YW |
469 | r = sd_device_get_parent(d, &parent); |
470 | if (r < 0) { | |
471 | log_debug_errno(r, "%s: not a partitioned device, ignoring: %m", name); | |
8090b41e | 472 | return 0; |
fa041593 | 473 | } |
1a14a53c | 474 | |
61331eab | 475 | /* Does it have a devtype? */ |
85624f01 YW |
476 | r = sd_device_get_devtype(parent, &devtype); |
477 | if (r < 0) { | |
478 | log_debug_errno(r, "%s: parent doesn't have a device type, ignoring: %m", name); | |
8090b41e | 479 | return 0; |
fa041593 | 480 | } |
61331eab LP |
481 | |
482 | /* Is this a disk or a partition? We only care for disks... */ | |
fa041593 | 483 | if (!streq(devtype, "disk")) { |
d2a62382 | 484 | log_debug("%s: parent isn't a raw disk, ignoring.", name); |
8090b41e | 485 | return 0; |
fa041593 | 486 | } |
61331eab LP |
487 | |
488 | /* Does it have a device node? */ | |
85624f01 YW |
489 | r = sd_device_get_devname(parent, &node); |
490 | if (r < 0) { | |
491 | log_debug_errno(r, "%s: parent device does not have device node, ignoring: %m", name); | |
8090b41e | 492 | return 0; |
fa041593 | 493 | } |
61331eab | 494 | |
d2a62382 | 495 | log_debug("%s: root device %s.", name, node); |
61331eab | 496 | |
85624f01 YW |
497 | r = sd_device_get_devnum(parent, &pn); |
498 | if (r < 0) { | |
499 | log_debug_errno(r, "%s: parent device is not a proper block device, ignoring: %m", name); | |
8090b41e | 500 | return 0; |
61331eab LP |
501 | } |
502 | ||
72e18a98 LP |
503 | fd = open(node, O_RDONLY|O_CLOEXEC|O_NOCTTY); |
504 | if (fd < 0) | |
505 | return log_error_errno(errno, "Failed to open %s: %m", node); | |
61331eab | 506 | |
72e18a98 LP |
507 | *ret = fd; |
508 | return 1; | |
72e18a98 | 509 | } |
cb971249 | 510 | |
72e18a98 | 511 | static int enumerate_partitions(dev_t devnum) { |
72e18a98 LP |
512 | _cleanup_close_ int fd = -1; |
513 | _cleanup_(dissected_image_unrefp) DissectedImage *m = NULL; | |
514 | int r, k; | |
61331eab | 515 | |
72e18a98 LP |
516 | r = open_parent(devnum, &fd); |
517 | if (r <= 0) | |
518 | return r; | |
61331eab | 519 | |
72e18a98 LP |
520 | r = dissect_image(fd, NULL, 0, DISSECT_IMAGE_GPT_ONLY, &m); |
521 | if (r == -ENOPKG) { | |
522 | log_debug_errno(r, "No suitable partition table found, ignoring."); | |
523 | return 0; | |
61331eab | 524 | } |
23bbb0de | 525 | if (r < 0) |
72e18a98 | 526 | return log_error_errno(r, "Failed to dissect: %m"); |
0238d4c6 | 527 | |
72e18a98 LP |
528 | if (m->partitions[PARTITION_SWAP].found) { |
529 | k = add_swap(m->partitions[PARTITION_SWAP].node); | |
530 | if (k < 0) | |
531 | r = k; | |
1a14a53c LP |
532 | } |
533 | ||
72e18a98 LP |
534 | if (m->partitions[PARTITION_ESP].found) { |
535 | k = add_esp(m->partitions + PARTITION_ESP); | |
59512f21 KS |
536 | if (k < 0) |
537 | r = k; | |
538 | } | |
539 | ||
72e18a98 LP |
540 | if (m->partitions[PARTITION_HOME].found) { |
541 | k = add_partition_mount(m->partitions + PARTITION_HOME, "home", "/home", "Home Partition"); | |
73b80ec2 LP |
542 | if (k < 0) |
543 | r = k; | |
544 | } | |
e48fdd84 | 545 | |
72e18a98 LP |
546 | if (m->partitions[PARTITION_SRV].found) { |
547 | k = add_partition_mount(m->partitions + PARTITION_SRV, "srv", "/srv", "Server Data Partition"); | |
73b80ec2 LP |
548 | if (k < 0) |
549 | r = k; | |
550 | } | |
1a14a53c | 551 | |
1a14a53c LP |
552 | return r; |
553 | } | |
554 | ||
96287a49 | 555 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
73b80ec2 | 556 | int r; |
1a14a53c | 557 | |
73b80ec2 | 558 | assert(key); |
1a14a53c | 559 | |
1d84ad94 | 560 | if (STR_IN_SET(key, "systemd.gpt_auto", "rd.systemd.gpt_auto")) { |
1a14a53c | 561 | |
1d84ad94 | 562 | r = value ? parse_boolean(value) : 1; |
73b80ec2 | 563 | if (r < 0) |
d2a62382 | 564 | log_warning("Failed to parse gpt-auto switch \"%s\". Ignoring.", value); |
8086ffac ZJS |
565 | else |
566 | arg_enabled = r; | |
1a14a53c | 567 | |
1d84ad94 LP |
568 | } else if (streq(key, "root")) { |
569 | ||
570 | if (proc_cmdline_value_missing(key, value)) | |
571 | return 0; | |
73b80ec2 LP |
572 | |
573 | /* Disable root disk logic if there's a root= value | |
574 | * specified (unless it happens to be "gpt-auto") */ | |
575 | ||
576 | arg_root_enabled = streq(value, "gpt-auto"); | |
577 | ||
2f3dfc6f LP |
578 | } else if (streq(key, "roothash")) { |
579 | ||
580 | if (proc_cmdline_value_missing(key, value)) | |
581 | return 0; | |
582 | ||
583 | /* Disable root disk logic if there's roothash= defined (i.e. verity enabled) */ | |
584 | ||
585 | arg_root_enabled = false; | |
586 | ||
73b80ec2 LP |
587 | } else if (streq(key, "rw") && !value) |
588 | arg_root_rw = true; | |
589 | else if (streq(key, "ro") && !value) | |
590 | arg_root_rw = false; | |
73b80ec2 LP |
591 | |
592 | return 0; | |
593 | } | |
594 | ||
349cc4a5 | 595 | #if ENABLE_EFI |
01af8c01 LP |
596 | static int add_root_cryptsetup(void) { |
597 | ||
598 | /* If a device /dev/gpt-auto-root-luks appears, then make it pull in systemd-cryptsetup-root.service, which | |
599 | * sets it up, and causes /dev/gpt-auto-root to appear which is all we are looking for. */ | |
600 | ||
601 | return add_cryptsetup("root", "/dev/gpt-auto-root-luks", true, false, NULL); | |
602 | } | |
603 | #endif | |
604 | ||
73b80ec2 LP |
605 | static int add_root_mount(void) { |
606 | ||
349cc4a5 | 607 | #if ENABLE_EFI |
73b80ec2 LP |
608 | int r; |
609 | ||
610 | if (!is_efi_boot()) { | |
611 | log_debug("Not a EFI boot, not creating root mount."); | |
612 | return 0; | |
9a5cb137 ZJS |
613 | } |
614 | ||
73b80ec2 LP |
615 | r = efi_loader_get_device_part_uuid(NULL); |
616 | if (r == -ENOENT) { | |
617 | log_debug("EFI loader partition unknown, exiting."); | |
618 | return 0; | |
23bbb0de MS |
619 | } else if (r < 0) |
620 | return log_error_errno(r, "Failed to read ESP partition UUID: %m"); | |
1a14a53c | 621 | |
73b80ec2 LP |
622 | /* OK, we have an ESP partition, this is fantastic, so let's |
623 | * wait for a root device to show up. A udev rule will create | |
624 | * the link for us under the right name. */ | |
625 | ||
7163e1ca DD |
626 | if (in_initrd()) { |
627 | r = generator_write_initrd_root_device_deps(arg_dest, "/dev/gpt-auto-root"); | |
628 | if (r < 0) | |
629 | return 0; | |
01af8c01 LP |
630 | |
631 | r = add_root_cryptsetup(); | |
632 | if (r < 0) | |
633 | return r; | |
7163e1ca DD |
634 | } |
635 | ||
73b80ec2 LP |
636 | return add_mount( |
637 | "root", | |
98b2f766 | 638 | "/dev/gpt-auto-root", |
73b80ec2 LP |
639 | in_initrd() ? "/sysroot" : "/", |
640 | NULL, | |
cca1dfdd | 641 | arg_root_rw, |
59512f21 | 642 | NULL, |
73b80ec2 LP |
643 | "Root Partition", |
644 | in_initrd() ? SPECIAL_INITRD_ROOT_FS_TARGET : SPECIAL_LOCAL_FS_TARGET); | |
645 | #else | |
646 | return 0; | |
647 | #endif | |
648 | } | |
649 | ||
650 | static int add_mounts(void) { | |
73b80ec2 LP |
651 | dev_t devno; |
652 | int r; | |
653 | ||
c6ba0c18 | 654 | r = get_block_device_harder("/", &devno); |
23bbb0de MS |
655 | if (r < 0) |
656 | return log_error_errno(r, "Failed to determine block device of root file system: %m"); | |
57ab9f89 | 657 | if (r == 0) { |
c6ba0c18 | 658 | r = get_block_device_harder("/usr", &devno); |
eafe88e3 TH |
659 | if (r < 0) |
660 | return log_error_errno(r, "Failed to determine block device of /usr file system: %m"); | |
57ab9f89 | 661 | if (r == 0) { |
eafe88e3 TH |
662 | log_debug("Neither root nor /usr file system are on a (single) block device."); |
663 | return 0; | |
664 | } | |
3db604b9 LP |
665 | } |
666 | ||
61331eab | 667 | return enumerate_partitions(devno); |
73b80ec2 LP |
668 | } |
669 | ||
670 | int main(int argc, char *argv[]) { | |
8f50e86a | 671 | int r, k; |
73b80ec2 LP |
672 | |
673 | if (argc > 1 && argc != 4) { | |
674 | log_error("This program takes three or no arguments."); | |
675 | return EXIT_FAILURE; | |
676 | } | |
677 | ||
678 | if (argc > 1) | |
679 | arg_dest = argv[3]; | |
680 | ||
6c347d50 LP |
681 | log_set_prohibit_ipc(true); |
682 | log_set_target(LOG_TARGET_AUTO); | |
73b80ec2 LP |
683 | log_parse_environment(); |
684 | log_open(); | |
685 | ||
686 | umask(0022); | |
687 | ||
75f86906 | 688 | if (detect_container() > 0) { |
73b80ec2 | 689 | log_debug("In a container, exiting."); |
e48fdd84 | 690 | return EXIT_SUCCESS; |
1a14a53c | 691 | } |
3db604b9 | 692 | |
1d84ad94 | 693 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 694 | if (r < 0) |
da927ba9 | 695 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
1a14a53c | 696 | |
73b80ec2 LP |
697 | if (!arg_enabled) { |
698 | log_debug("Disabled, exiting."); | |
699 | return EXIT_SUCCESS; | |
700 | } | |
701 | ||
702 | if (arg_root_enabled) | |
703 | r = add_root_mount(); | |
8f50e86a LP |
704 | else |
705 | r = 0; | |
73b80ec2 LP |
706 | |
707 | if (!in_initrd()) { | |
73b80ec2 LP |
708 | k = add_mounts(); |
709 | if (k < 0) | |
710 | r = k; | |
711 | } | |
712 | ||
713 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1a14a53c | 714 | } |