]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e23a0ce8 | 2 | |
e23a0ce8 | 3 | #include <errno.h> |
ca78ad1d | 4 | #include <fcntl.h> |
ca78ad1d ZJS |
5 | #include <sys/stat.h> |
6 | #include <sys/types.h> | |
e23a0ce8 | 7 | |
b5efdb8a | 8 | #include "alloc-util.h" |
0fa9e53d | 9 | #include "dropin.h" |
7949dfa7 | 10 | #include "escape.h" |
3ffd4af2 | 11 | #include "fd-util.h" |
0d39fa9c | 12 | #include "fileio.h" |
07630cea | 13 | #include "fstab-util.h" |
0fa9e53d JJ |
14 | #include "generator.h" |
15 | #include "hashmap.h" | |
7949dfa7 | 16 | #include "id128-util.h" |
e23a0ce8 | 17 | #include "log.h" |
49e942b2 | 18 | #include "mkdir.h" |
6bedfcbb | 19 | #include "parse-util.h" |
bde29068 | 20 | #include "path-util.h" |
4e731273 | 21 | #include "proc-cmdline.h" |
98bad05e | 22 | #include "specifier.h" |
07630cea | 23 | #include "string-util.h" |
0fa9e53d JJ |
24 | #include "strv.h" |
25 | #include "unit-name.h" | |
26 | #include "util.h" | |
27 | ||
28 | typedef struct crypto_device { | |
29 | char *uuid; | |
6cd5b12a | 30 | char *keyfile; |
70f5f48e | 31 | char *keydev; |
baade8cc | 32 | char *name; |
0fa9e53d JJ |
33 | char *options; |
34 | bool create; | |
35 | } crypto_device; | |
e23a0ce8 | 36 | |
7a44c7e3 | 37 | static const char *arg_dest = NULL; |
66a78c2b LP |
38 | static bool arg_enabled = true; |
39 | static bool arg_read_crypttab = true; | |
a6c57e74 | 40 | static const char *arg_crypttab = NULL; |
3f5ac303 | 41 | static const char *arg_runtime_directory = NULL; |
6b000af4 | 42 | static bool arg_allow_list = false; |
0fa9e53d JJ |
43 | static Hashmap *arg_disks = NULL; |
44 | static char *arg_default_options = NULL; | |
45 | static char *arg_default_keyfile = NULL; | |
141a79f4 | 46 | |
a4a90e65 YW |
47 | STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep); |
48 | STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep); | |
49 | STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep); | |
50 | ||
fc6f1ad1 OK |
51 | static int split_locationspec(const char *locationspec, char **ret_file, char **ret_device) { |
52 | _cleanup_free_ char *file = NULL, *device = NULL; | |
f4ea8432 | 53 | const char *c; |
50d2eba2 | 54 | |
fc6f1ad1 OK |
55 | assert(ret_file); |
56 | assert(ret_device); | |
50d2eba2 | 57 | |
fc6f1ad1 OK |
58 | if (!locationspec) { |
59 | *ret_file = *ret_device = NULL; | |
fef716b2 ZJS |
60 | return 0; |
61 | } | |
62 | ||
fc6f1ad1 | 63 | c = strrchr(locationspec, ':'); |
50d2eba2 | 64 | if (c) { |
fc6f1ad1 | 65 | /* The device part has to be either an absolute path to device node (/dev/something, |
32c6237a | 66 | * /dev/foo/something, or even possibly /dev/foo/something:part), or a fstab device |
fc6f1ad1 | 67 | * specification starting with LABEL= or similar. The file part has the same syntax. |
32c6237a | 68 | * |
fc6f1ad1 | 69 | * Let's try to guess if the second part looks like a device specification, or just part of a |
32c6237a ZJS |
70 | * filename with a colon. fstab_node_to_udev_node() will convert the fstab device syntax to |
71 | * an absolute path. If we didn't get an absolute path, assume that it is just part of the | |
fc6f1ad1 | 72 | * first file argument. */ |
32c6237a | 73 | |
fc6f1ad1 OK |
74 | device = fstab_node_to_udev_node(c + 1); |
75 | if (!device) | |
50d2eba2 | 76 | return log_oom(); |
32c6237a | 77 | |
fc6f1ad1 OK |
78 | if (path_is_absolute(device)) |
79 | file = strndup(locationspec, c-locationspec); | |
32c6237a | 80 | else { |
fc6f1ad1 | 81 | log_debug("Location specification argument contains a colon, but \"%s\" doesn't look like a device specification.\n" |
32c6237a | 82 | "Assuming that \"%s\" is a single device specification.", |
fc6f1ad1 OK |
83 | c + 1, locationspec); |
84 | device = mfree(device); | |
32c6237a ZJS |
85 | c = NULL; |
86 | } | |
87 | } | |
88 | ||
89 | if (!c) | |
fc6f1ad1 OK |
90 | /* No device specified */ |
91 | file = strdup(locationspec); | |
32c6237a | 92 | |
fc6f1ad1 | 93 | if (!file) |
32c6237a | 94 | return log_oom(); |
50d2eba2 | 95 | |
fc6f1ad1 OK |
96 | *ret_file = TAKE_PTR(file); |
97 | *ret_device = TAKE_PTR(device); | |
50d2eba2 | 98 | |
99 | return 0; | |
100 | } | |
101 | ||
eb7d9aa3 | 102 | static int generate_device_mount( |
49685fb3 | 103 | const char *name, |
eb7d9aa3 OK |
104 | const char *device, |
105 | const char *type_prefix, /* "keydev" or "headerdev" */ | |
106 | const char *device_timeout, | |
49685fb3 | 107 | bool canfail, |
eb7d9aa3 | 108 | bool readonly, |
49685fb3 LP |
109 | char **unit, |
110 | char **mount) { | |
111 | ||
32c6237a | 112 | _cleanup_free_ char *u = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL; |
70f5f48e MS |
113 | _cleanup_fclose_ FILE *f = NULL; |
114 | int r; | |
50d2eba2 | 115 | usec_t timeout_us; |
70f5f48e MS |
116 | |
117 | assert(name); | |
eb7d9aa3 | 118 | assert(device); |
70f5f48e MS |
119 | assert(unit); |
120 | assert(mount); | |
121 | ||
3f5ac303 | 122 | r = mkdir_parents(arg_runtime_directory, 0755); |
70f5f48e MS |
123 | if (r < 0) |
124 | return r; | |
125 | ||
3f5ac303 | 126 | r = mkdir(arg_runtime_directory, 0700); |
579875bc MS |
127 | if (r < 0 && errno != EEXIST) |
128 | return -errno; | |
70f5f48e | 129 | |
7949dfa7 MS |
130 | name_escaped = cescape(name); |
131 | if (!name_escaped) | |
132 | return -ENOMEM; | |
133 | ||
eb7d9aa3 | 134 | where = strjoin(arg_runtime_directory, "/", type_prefix, "-", name_escaped); |
70f5f48e MS |
135 | if (!where) |
136 | return -ENOMEM; | |
137 | ||
138 | r = mkdir(where, 0700); | |
579875bc MS |
139 | if (r < 0 && errno != EEXIST) |
140 | return -errno; | |
70f5f48e MS |
141 | |
142 | r = unit_name_from_path(where, ".mount", &u); | |
143 | if (r < 0) | |
144 | return r; | |
145 | ||
146 | r = generator_open_unit_file(arg_dest, NULL, u, &f); | |
147 | if (r < 0) | |
148 | return r; | |
149 | ||
70f5f48e MS |
150 | fprintf(f, |
151 | "[Unit]\n" | |
152 | "DefaultDependencies=no\n\n" | |
153 | "[Mount]\n" | |
154 | "What=%s\n" | |
155 | "Where=%s\n" | |
eb7d9aa3 | 156 | "Options=%s%s\n", device, where, readonly ? "ro" : "rw", canfail ? ",nofail" : ""); |
50d2eba2 | 157 | |
eb7d9aa3 OK |
158 | if (device_timeout) { |
159 | r = parse_sec_fix_0(device_timeout, &timeout_us); | |
50d2eba2 | 160 | if (r >= 0) { |
eb7d9aa3 | 161 | r = unit_name_from_path(device, ".device", &device_unit); |
50d2eba2 | 162 | if (r < 0) |
163 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
164 | ||
165 | r = write_drop_in_format(arg_dest, device_unit, 90, "device-timeout", | |
166 | "# Automatically generated by systemd-cryptsetup-generator \n\n" | |
eb7d9aa3 | 167 | "[Unit]\nJobRunningTimeoutSec=%s", device_timeout); |
50d2eba2 | 168 | if (r < 0) |
169 | return log_error_errno(r, "Failed to write device drop-in: %m"); | |
170 | ||
171 | } else | |
eb7d9aa3 | 172 | log_warning_errno(r, "Failed to parse %s, ignoring: %m", device_timeout); |
50d2eba2 | 173 | |
174 | } | |
70f5f48e MS |
175 | |
176 | r = fflush_and_check(f); | |
177 | if (r < 0) | |
178 | return r; | |
179 | ||
180 | *unit = TAKE_PTR(u); | |
181 | *mount = TAKE_PTR(where); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
eb7d9aa3 OK |
186 | static int generate_device_umount(const char *name, |
187 | const char *device_mount, | |
188 | const char *type_prefix, /* "keydev" or "headerdev" */ | |
882f5f42 MS |
189 | char **ret_umount_unit) { |
190 | _cleanup_fclose_ FILE *f = NULL; | |
191 | _cleanup_free_ char *u = NULL, *name_escaped = NULL, *mount = NULL; | |
192 | int r; | |
193 | ||
194 | assert(name); | |
195 | assert(ret_umount_unit); | |
196 | ||
197 | name_escaped = cescape(name); | |
198 | if (!name_escaped) | |
199 | return -ENOMEM; | |
200 | ||
eb7d9aa3 | 201 | u = strjoin(type_prefix, "-", name_escaped, "-umount.service"); |
882f5f42 MS |
202 | if (!u) |
203 | return -ENOMEM; | |
204 | ||
eb7d9aa3 | 205 | r = unit_name_from_path(device_mount, ".mount", &mount); |
882f5f42 MS |
206 | if (r < 0) |
207 | return r; | |
208 | ||
209 | r = generator_open_unit_file(arg_dest, NULL, u, &f); | |
210 | if (r < 0) | |
211 | return r; | |
212 | ||
213 | fprintf(f, | |
214 | "[Unit]\n" | |
215 | "DefaultDependencies=no\n" | |
216 | "After=%s\n\n" | |
217 | "[Service]\n" | |
eb7d9aa3 | 218 | "ExecStart=-" UMOUNT_PATH " %s\n\n", mount, device_mount); |
882f5f42 MS |
219 | |
220 | r = fflush_and_check(f); | |
221 | if (r < 0) | |
222 | return r; | |
223 | ||
224 | *ret_umount_unit = TAKE_PTR(u); | |
225 | return 0; | |
226 | } | |
227 | ||
38ab1ec9 RS |
228 | static int print_dependencies(FILE *f, const char* device_path) { |
229 | int r; | |
230 | ||
231 | if (STR_IN_SET(device_path, "-", "none")) | |
232 | /* None, nothing to do */ | |
233 | return 0; | |
234 | ||
c6b1d7d1 LP |
235 | if (PATH_IN_SET(device_path, |
236 | "/dev/urandom", | |
237 | "/dev/random", | |
238 | "/dev/hw_random", | |
239 | "/dev/hwrng")) { | |
38ab1ec9 RS |
240 | /* RNG device, add random dep */ |
241 | fputs("After=systemd-random-seed.service\n", f); | |
242 | return 0; | |
243 | } | |
244 | ||
245 | _cleanup_free_ char *udev_node = fstab_node_to_udev_node(device_path); | |
246 | if (!udev_node) | |
247 | return log_oom(); | |
248 | ||
249 | if (path_equal(udev_node, "/dev/null")) | |
250 | return 0; | |
251 | ||
252 | if (path_startswith(udev_node, "/dev/")) { | |
162392b7 | 253 | /* We are dealing with a block device, add dependency for corresponding unit */ |
38ab1ec9 RS |
254 | _cleanup_free_ char *unit = NULL; |
255 | ||
256 | r = unit_name_from_path(udev_node, ".device", &unit); | |
257 | if (r < 0) | |
258 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
259 | ||
c6b1d7d1 LP |
260 | fprintf(f, |
261 | "After=%1$s\n" | |
262 | "Requires=%1$s\n", unit); | |
38ab1ec9 RS |
263 | } else { |
264 | /* Regular file, add mount dependency */ | |
265 | _cleanup_free_ char *escaped_path = specifier_escape(device_path); | |
266 | if (!escaped_path) | |
267 | return log_oom(); | |
268 | ||
269 | fprintf(f, "RequiresMountsFor=%s\n", escaped_path); | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
e23a0ce8 LP |
275 | static int create_disk( |
276 | const char *name, | |
277 | const char *device, | |
278 | const char *password, | |
50d2eba2 | 279 | const char *keydev, |
62ca7d3b JL |
280 | const char *options, |
281 | const char *source) { | |
e23a0ce8 | 282 | |
fb883e75 | 283 | _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL, |
a7e88558 | 284 | *keydev_mount = NULL, *keyfile_timeout_value = NULL, |
53ac130b LP |
285 | *filtered = NULL, *u_escaped = NULL, *name_escaped = NULL, *header_path = NULL, *password_buffer = NULL, |
286 | *tmp_fstype = NULL; | |
7fd1b19b | 287 | _cleanup_fclose_ FILE *f = NULL; |
b559616f | 288 | const char *dmname; |
53ac130b LP |
289 | bool noauto, nofail, swap, netdev, attach_in_initrd; |
290 | int r, detached_header, keyfile_can_timeout, tmp; | |
e23a0ce8 LP |
291 | |
292 | assert(name); | |
293 | assert(device); | |
294 | ||
b9f111b9 ZJS |
295 | noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0"); |
296 | nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0"); | |
a6dba978 | 297 | swap = fstab_test_option(options, "swap\0"); |
b001ad61 | 298 | netdev = fstab_test_option(options, "_netdev\0"); |
1dc85eff | 299 | attach_in_initrd = fstab_test_option(options, "x-initrd.attach\0"); |
8c11d3c1 | 300 | |
50d2eba2 | 301 | keyfile_can_timeout = fstab_filter_options(options, "keyfile-timeout\0", NULL, &keyfile_timeout_value, NULL); |
302 | if (keyfile_can_timeout < 0) | |
303 | return log_error_errno(keyfile_can_timeout, "Failed to parse keyfile-timeout= option value: %m"); | |
304 | ||
38ab1ec9 RS |
305 | detached_header = fstab_filter_options(options, "header\0", NULL, &header_path, NULL); |
306 | if (detached_header < 0) | |
307 | return log_error_errno(detached_header, "Failed to parse header= option value: %m"); | |
308 | ||
53ac130b LP |
309 | tmp = fstab_filter_options(options, "tmp\0", NULL, &tmp_fstype, NULL); |
310 | if (tmp < 0) | |
311 | return log_error_errno(tmp, "Failed to parse tmp= option value: %m"); | |
312 | ||
baaa35ad ZJS |
313 | if (tmp && swap) |
314 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
315 | "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", | |
316 | name); | |
155da457 | 317 | |
98bad05e LP |
318 | name_escaped = specifier_escape(name); |
319 | if (!name_escaped) | |
320 | return log_oom(); | |
321 | ||
744198e9 LP |
322 | e = unit_name_escape(name); |
323 | if (!e) | |
324 | return log_oom(); | |
325 | ||
f7f21d33 | 326 | u = fstab_node_to_udev_node(device); |
24a988e9 HH |
327 | if (!u) |
328 | return log_oom(); | |
e23a0ce8 | 329 | |
fb883e75 ZJS |
330 | r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
331 | if (r < 0) | |
332 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
333 | ||
98bad05e LP |
334 | u_escaped = specifier_escape(u); |
335 | if (!u_escaped) | |
336 | return log_oom(); | |
337 | ||
7410616c LP |
338 | r = unit_name_from_path(u, ".device", &d); |
339 | if (r < 0) | |
340 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
e23a0ce8 | 341 | |
baaa35ad ZJS |
342 | if (keydev && !password) |
343 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
344 | "Key device is specified, but path to the password file is missing."); | |
70f5f48e | 345 | |
fb883e75 ZJS |
346 | r = generator_open_unit_file(arg_dest, NULL, n, &f); |
347 | if (r < 0) | |
348 | return r; | |
0d536673 | 349 | |
62ca7d3b | 350 | r = generator_write_cryptsetup_unit_section(f, source); |
a7e88558 LP |
351 | if (r < 0) |
352 | return r; | |
6bbd539e LP |
353 | |
354 | if (netdev) | |
355 | fprintf(f, "After=remote-fs-pre.target\n"); | |
e23a0ce8 | 356 | |
1dc85eff FB |
357 | /* If initrd takes care of attaching the disk then it should also detach it during shutdown. */ |
358 | if (!attach_in_initrd) | |
359 | fprintf(f, "Conflicts=umount.target\n"); | |
360 | ||
70f5f48e | 361 | if (keydev) { |
882f5f42 | 362 | _cleanup_free_ char *unit = NULL, *umount_unit = NULL; |
70f5f48e | 363 | |
eb7d9aa3 OK |
364 | r = generate_device_mount( |
365 | name, | |
366 | keydev, | |
367 | "keydev", | |
368 | keyfile_timeout_value, | |
369 | /* canfail = */ keyfile_can_timeout > 0, | |
370 | /* readonly= */ true, | |
371 | &unit, | |
372 | &keydev_mount); | |
70f5f48e MS |
373 | if (r < 0) |
374 | return log_error_errno(r, "Failed to generate keydev mount unit: %m"); | |
375 | ||
eb7d9aa3 | 376 | r = generate_device_umount(name, keydev_mount, "keydev", &umount_unit); |
882f5f42 MS |
377 | if (r < 0) |
378 | return log_error_errno(r, "Failed to generate keydev umount unit: %m"); | |
379 | ||
a7e88558 LP |
380 | password_buffer = path_join(keydev_mount, password); |
381 | if (!password_buffer) | |
70f5f48e MS |
382 | return log_oom(); |
383 | ||
a7e88558 | 384 | password = password_buffer; |
50d2eba2 | 385 | |
386 | fprintf(f, "After=%s\n", unit); | |
387 | if (keyfile_can_timeout > 0) | |
388 | fprintf(f, "Wants=%s\n", unit); | |
389 | else | |
390 | fprintf(f, "Requires=%s\n", unit); | |
882f5f42 MS |
391 | |
392 | if (umount_unit) { | |
393 | fprintf(f, | |
394 | "Wants=%s\n" | |
395 | "Before=%s\n", | |
396 | umount_unit, | |
397 | umount_unit | |
398 | ); | |
399 | } | |
70f5f48e MS |
400 | } |
401 | ||
155da457 LP |
402 | if (!nofail) |
403 | fprintf(f, | |
b001ad61 ZJS |
404 | "Before=%s\n", |
405 | netdev ? "remote-cryptsetup.target" : "cryptsetup.target"); | |
155da457 | 406 | |
50d2eba2 | 407 | if (password && !keydev) { |
38ab1ec9 RS |
408 | r = print_dependencies(f, password); |
409 | if (r < 0) | |
410 | return r; | |
411 | } | |
bde29068 | 412 | |
38ab1ec9 RS |
413 | /* Check if a header option was specified */ |
414 | if (detached_header > 0) { | |
415 | r = print_dependencies(f, header_path); | |
416 | if (r < 0) | |
417 | return r; | |
ceca9501 | 418 | } |
e23a0ce8 | 419 | |
a7e88558 | 420 | if (path_startswith(u, "/dev/")) |
9ece938a TW |
421 | fprintf(f, |
422 | "BindsTo=%s\n" | |
423 | "After=%s\n" | |
424 | "Before=umount.target\n", | |
425 | d, d); | |
a7e88558 | 426 | else |
b90cbe66 LHS |
427 | /* For loopback devices, add systemd-tmpfiles-setup-dev.service |
428 | dependency to ensure that loopback support is available in | |
429 | the kernel (/dev/loop-control needs to exist) */ | |
9ece938a | 430 | fprintf(f, |
b90cbe66 LHS |
431 | "RequiresMountsFor=%s\n" |
432 | "Requires=systemd-tmpfiles-setup-dev.service\n" | |
433 | "After=systemd-tmpfiles-setup-dev.service\n", | |
98bad05e LP |
434 | u_escaped); |
435 | ||
8eea8687 ZJS |
436 | r = generator_write_timeouts(arg_dest, device, name, options, &filtered); |
437 | if (r < 0) | |
7cecc563 | 438 | log_warning_errno(r, "Failed to write device timeout drop-in: %m"); |
8eea8687 | 439 | |
a7e88558 LP |
440 | r = generator_write_cryptsetup_service_section(f, name, u, password, filtered); |
441 | if (r < 0) | |
442 | return r; | |
e23a0ce8 | 443 | |
53ac130b LP |
444 | if (tmp) { |
445 | _cleanup_free_ char *tmp_fstype_escaped = NULL; | |
446 | ||
447 | if (tmp_fstype) { | |
448 | tmp_fstype_escaped = specifier_escape(tmp_fstype); | |
449 | if (!tmp_fstype_escaped) | |
450 | return log_oom(); | |
451 | } | |
452 | ||
e23a0ce8 | 453 | fprintf(f, |
53ac130b LP |
454 | "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs '%s' '/dev/mapper/%s'\n", |
455 | tmp_fstype_escaped ?: "ext4", name_escaped); | |
456 | } | |
e23a0ce8 | 457 | |
8c11d3c1 | 458 | if (swap) |
e23a0ce8 | 459 | fprintf(f, |
db2c56b0 | 460 | "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs swap '/dev/mapper/%s'\n", |
98bad05e | 461 | name_escaped); |
e23a0ce8 | 462 | |
4652c56c ZJS |
463 | r = fflush_and_check(f); |
464 | if (r < 0) | |
fb883e75 | 465 | return log_error_errno(r, "Failed to write unit file %s: %m", n); |
e23a0ce8 | 466 | |
155da457 | 467 | if (!noauto) { |
b001ad61 ZJS |
468 | r = generator_add_symlink(arg_dest, |
469 | netdev ? "remote-cryptsetup.target" : "cryptsetup.target", | |
b559616f ZJS |
470 | nofail ? "wants" : "requires", n); |
471 | if (r < 0) | |
472 | return r; | |
f7f21d33 | 473 | } |
74715b82 | 474 | |
b559616f ZJS |
475 | dmname = strjoina("dev-mapper-", e, ".device"); |
476 | r = generator_add_symlink(arg_dest, dmname, "requires", n); | |
477 | if (r < 0) | |
478 | return r; | |
74715b82 | 479 | |
68395007 | 480 | if (!noauto && !nofail) { |
7cecc563 ZJS |
481 | r = write_drop_in(arg_dest, dmname, 40, "device-timeout", |
482 | "# Automatically generated by systemd-cryptsetup-generator\n\n" | |
8eea8687 | 483 | "[Unit]\nJobTimeoutSec=0"); |
23bbb0de | 484 | if (r < 0) |
7cecc563 | 485 | log_warning_errno(r, "Failed to write device timeout drop-in: %m"); |
68395007 HH |
486 | } |
487 | ||
24a988e9 | 488 | return 0; |
e23a0ce8 LP |
489 | } |
490 | ||
a4a90e65 YW |
491 | static crypto_device* crypt_device_free(crypto_device *d) { |
492 | if (!d) | |
493 | return NULL; | |
494 | ||
6dd1c368 ZJS |
495 | free(d->uuid); |
496 | free(d->keyfile); | |
70f5f48e | 497 | free(d->keydev); |
6dd1c368 ZJS |
498 | free(d->name); |
499 | free(d->options); | |
a4a90e65 | 500 | return mfree(d); |
0fa9e53d JJ |
501 | } |
502 | ||
503 | static crypto_device *get_crypto_device(const char *uuid) { | |
504 | int r; | |
505 | crypto_device *d; | |
506 | ||
507 | assert(uuid); | |
508 | ||
509 | d = hashmap_get(arg_disks, uuid); | |
510 | if (!d) { | |
511 | d = new0(struct crypto_device, 1); | |
512 | if (!d) | |
513 | return NULL; | |
514 | ||
0fa9e53d | 515 | d->uuid = strdup(uuid); |
6b430fdb ZJS |
516 | if (!d->uuid) |
517 | return mfree(d); | |
0fa9e53d JJ |
518 | |
519 | r = hashmap_put(arg_disks, d->uuid, d); | |
520 | if (r < 0) { | |
521 | free(d->uuid); | |
6b430fdb | 522 | return mfree(d); |
0fa9e53d JJ |
523 | } |
524 | } | |
525 | ||
526 | return d; | |
527 | } | |
528 | ||
c3ee5b34 OK |
529 | static bool warn_uuid_invalid(const char *uuid, const char *key) { |
530 | assert(key); | |
531 | ||
532 | if (!id128_is_valid(uuid)) { | |
533 | log_warning("Failed to parse %s= kernel command line switch. UUID is invalid, ignoring.", key); | |
534 | return true; | |
535 | } | |
536 | ||
537 | return false; | |
538 | } | |
539 | ||
96287a49 | 540 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
0fa9e53d | 541 | _cleanup_free_ char *uuid = NULL, *uuid_value = NULL; |
1d84ad94 LP |
542 | crypto_device *d; |
543 | int r; | |
66a78c2b | 544 | |
1d84ad94 | 545 | if (streq(key, "luks")) { |
059cb385 | 546 | |
1d84ad94 | 547 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 548 | if (r < 0) |
1d84ad94 | 549 | log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value); |
141a79f4 ZJS |
550 | else |
551 | arg_enabled = r; | |
66a78c2b | 552 | |
1d84ad94 | 553 | } else if (streq(key, "luks.crypttab")) { |
66a78c2b | 554 | |
1d84ad94 | 555 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 556 | if (r < 0) |
1d84ad94 | 557 | log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value); |
141a79f4 ZJS |
558 | else |
559 | arg_read_crypttab = r; | |
66a78c2b | 560 | |
1d84ad94 LP |
561 | } else if (streq(key, "luks.uuid")) { |
562 | ||
563 | if (proc_cmdline_value_missing(key, value)) | |
564 | return 0; | |
66a78c2b | 565 | |
263a7964 | 566 | d = get_crypto_device(startswith(value, "luks-") ?: value); |
0fa9e53d | 567 | if (!d) |
141a79f4 | 568 | return log_oom(); |
66a78c2b | 569 | |
6b000af4 | 570 | d->create = arg_allow_list = true; |
0fa9e53d | 571 | |
1d84ad94 LP |
572 | } else if (streq(key, "luks.options")) { |
573 | ||
574 | if (proc_cmdline_value_missing(key, value)) | |
575 | return 0; | |
66a78c2b | 576 | |
0fa9e53d JJ |
577 | r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); |
578 | if (r == 2) { | |
579 | d = get_crypto_device(uuid); | |
580 | if (!d) | |
581 | return log_oom(); | |
582 | ||
1d84ad94 | 583 | free_and_replace(d->options, uuid_value); |
0fa9e53d | 584 | } else if (free_and_strdup(&arg_default_options, value) < 0) |
141a79f4 | 585 | return log_oom(); |
66a78c2b | 586 | |
1d84ad94 | 587 | } else if (streq(key, "luks.key")) { |
7949dfa7 MS |
588 | size_t n; |
589 | _cleanup_free_ char *keyfile = NULL, *keydev = NULL; | |
7949dfa7 | 590 | const char *keyspec; |
1d84ad94 LP |
591 | |
592 | if (proc_cmdline_value_missing(key, value)) | |
593 | return 0; | |
66a78c2b | 594 | |
008fd4f9 | 595 | n = strspn(value, ALPHANUMERICAL "-"); |
7949dfa7 MS |
596 | if (value[n] != '=') { |
597 | if (free_and_strdup(&arg_default_keyfile, value) < 0) | |
598 | return log_oom(); | |
599 | return 0; | |
600 | } | |
70f5f48e | 601 | |
7949dfa7 MS |
602 | uuid = strndup(value, n); |
603 | if (!uuid) | |
604 | return log_oom(); | |
6cd5b12a | 605 | |
c3ee5b34 | 606 | if (warn_uuid_invalid(uuid, key)) |
7949dfa7 | 607 | return 0; |
7949dfa7 MS |
608 | |
609 | d = get_crypto_device(uuid); | |
610 | if (!d) | |
611 | return log_oom(); | |
70f5f48e | 612 | |
7949dfa7 | 613 | keyspec = value + n + 1; |
fc6f1ad1 | 614 | r = split_locationspec(keyspec, &keyfile, &keydev); |
50d2eba2 | 615 | if (r < 0) |
616 | return r; | |
70f5f48e | 617 | |
7949dfa7 MS |
618 | free_and_replace(d->keyfile, keyfile); |
619 | free_and_replace(d->keydev, keydev); | |
50d2eba2 | 620 | |
1d84ad94 LP |
621 | } else if (streq(key, "luks.name")) { |
622 | ||
623 | if (proc_cmdline_value_missing(key, value)) | |
624 | return 0; | |
baade8cc JJ |
625 | |
626 | r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); | |
627 | if (r == 2) { | |
628 | d = get_crypto_device(uuid); | |
629 | if (!d) | |
630 | return log_oom(); | |
631 | ||
6b000af4 | 632 | d->create = arg_allow_list = true; |
baade8cc | 633 | |
f9ecfd3b | 634 | free_and_replace(d->name, uuid_value); |
baade8cc JJ |
635 | } else |
636 | log_warning("Failed to parse luks name switch %s. Ignoring.", value); | |
85013844 | 637 | } |
66a78c2b | 638 | |
24a988e9 | 639 | return 0; |
66a78c2b LP |
640 | } |
641 | ||
0fa9e53d | 642 | static int add_crypttab_devices(void) { |
7fd1b19b | 643 | _cleanup_fclose_ FILE *f = NULL; |
b42674a1 LP |
644 | unsigned crypttab_line = 0; |
645 | struct stat st; | |
646 | int r; | |
e23a0ce8 | 647 | |
0fa9e53d JJ |
648 | if (!arg_read_crypttab) |
649 | return 0; | |
650 | ||
a6c57e74 | 651 | r = fopen_unlocked(arg_crypttab, "re", &f); |
fdeea3f4 | 652 | if (r < 0) { |
0fa9e53d | 653 | if (errno != ENOENT) |
a6c57e74 | 654 | log_error_errno(errno, "Failed to open %s: %m", arg_crypttab); |
0fa9e53d | 655 | return 0; |
e23a0ce8 LP |
656 | } |
657 | ||
0fa9e53d | 658 | if (fstat(fileno(f), &st) < 0) { |
a6c57e74 | 659 | log_error_errno(errno, "Failed to stat %s: %m", arg_crypttab); |
0fa9e53d JJ |
660 | return 0; |
661 | } | |
e23a0ce8 | 662 | |
0fa9e53d | 663 | for (;;) { |
fef716b2 | 664 | _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyspec = NULL, *options = NULL, *keyfile = NULL, *keydev = NULL; |
0fa9e53d | 665 | crypto_device *d = NULL; |
b42674a1 LP |
666 | char *l, *uuid; |
667 | int k; | |
4c12626c | 668 | |
b42674a1 LP |
669 | r = read_line(f, LONG_LINE_MAX, &line); |
670 | if (r < 0) | |
a6c57e74 | 671 | return log_error_errno(r, "Failed to read %s: %m", arg_crypttab); |
b42674a1 | 672 | if (r == 0) |
0fa9e53d | 673 | break; |
66a78c2b | 674 | |
0fa9e53d | 675 | crypttab_line++; |
141a79f4 | 676 | |
0fa9e53d | 677 | l = strstrip(line); |
b42674a1 | 678 | if (IN_SET(l[0], 0, '#')) |
0fa9e53d | 679 | continue; |
66a78c2b | 680 | |
50d2eba2 | 681 | k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyspec, &options); |
0fa9e53d | 682 | if (k < 2 || k > 4) { |
a6c57e74 | 683 | log_error("Failed to parse %s:%u, ignoring.", arg_crypttab, crypttab_line); |
0fa9e53d JJ |
684 | continue; |
685 | } | |
66a78c2b | 686 | |
844d5a87 | 687 | uuid = startswith(device, "UUID="); |
0fa9e53d JJ |
688 | if (!uuid) |
689 | uuid = path_startswith(device, "/dev/disk/by-uuid/"); | |
844d5a87 LR |
690 | if (!uuid) |
691 | uuid = startswith(name, "luks-"); | |
0fa9e53d JJ |
692 | if (uuid) |
693 | d = hashmap_get(arg_disks, uuid); | |
8973790e | 694 | |
6b000af4 | 695 | if (arg_allow_list && !d) { |
0fa9e53d JJ |
696 | log_info("Not creating device '%s' because it was not specified on the kernel command line.", name); |
697 | continue; | |
8973790e LP |
698 | } |
699 | ||
fc6f1ad1 | 700 | r = split_locationspec(keyspec, &keyfile, &keydev); |
50d2eba2 | 701 | if (r < 0) |
702 | return r; | |
703 | ||
62ca7d3b | 704 | r = create_disk(name, device, keyfile, keydev, (d && d->options) ? d->options : options, arg_crypttab); |
0fa9e53d JJ |
705 | if (r < 0) |
706 | return r; | |
8973790e | 707 | |
0fa9e53d JJ |
708 | if (d) |
709 | d->create = false; | |
710 | } | |
8973790e | 711 | |
0fa9e53d JJ |
712 | return 0; |
713 | } | |
66a78c2b | 714 | |
0fa9e53d JJ |
715 | static int add_proc_cmdline_devices(void) { |
716 | int r; | |
0fa9e53d | 717 | crypto_device *d; |
66a78c2b | 718 | |
90e74a66 | 719 | HASHMAP_FOREACH(d, arg_disks) { |
baade8cc | 720 | _cleanup_free_ char *device = NULL; |
66a78c2b | 721 | |
0fa9e53d JJ |
722 | if (!d->create) |
723 | continue; | |
e23a0ce8 | 724 | |
baade8cc | 725 | if (!d->name) { |
b910cc72 | 726 | d->name = strjoin("luks-", d->uuid); |
baade8cc JJ |
727 | if (!d->name) |
728 | return log_oom(); | |
729 | } | |
e23a0ce8 | 730 | |
b910cc72 | 731 | device = strjoin("UUID=", d->uuid); |
0fa9e53d JJ |
732 | if (!device) |
733 | return log_oom(); | |
7ab064a6 | 734 | |
7cecc563 ZJS |
735 | r = create_disk(d->name, |
736 | device, | |
737 | d->keyfile ?: arg_default_keyfile, | |
738 | d->keydev, | |
62ca7d3b JL |
739 | d->options ?: arg_default_options, |
740 | "/proc/cmdline"); | |
0fa9e53d JJ |
741 | if (r < 0) |
742 | return r; | |
e23a0ce8 LP |
743 | } |
744 | ||
0fa9e53d JJ |
745 | return 0; |
746 | } | |
e23a0ce8 | 747 | |
a4a90e65 YW |
748 | DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func, |
749 | crypto_device, crypt_device_free); | |
750 | ||
7a44c7e3 | 751 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
5f4bfe56 | 752 | int r; |
e23a0ce8 | 753 | |
7a44c7e3 | 754 | assert_se(arg_dest = dest); |
e23a0ce8 | 755 | |
a6c57e74 | 756 | arg_crypttab = getenv("SYSTEMD_CRYPTTAB") ?: "/etc/crypttab"; |
3f5ac303 | 757 | arg_runtime_directory = getenv("RUNTIME_DIRECTORY") ?: "/run/systemd/cryptsetup"; |
a6c57e74 | 758 | |
a4a90e65 YW |
759 | arg_disks = hashmap_new(&crypt_device_hash_ops); |
760 | if (!arg_disks) | |
761 | return log_oom(); | |
7ab064a6 | 762 | |
1d84ad94 | 763 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
a4a90e65 YW |
764 | if (r < 0) |
765 | return log_warning_errno(r, "Failed to parse kernel command line: %m"); | |
7ab064a6 | 766 | |
a4a90e65 YW |
767 | if (!arg_enabled) |
768 | return 0; | |
e23a0ce8 | 769 | |
5f4bfe56 LP |
770 | r = add_crypttab_devices(); |
771 | if (r < 0) | |
a4a90e65 | 772 | return r; |
0fa9e53d | 773 | |
5f4bfe56 LP |
774 | r = add_proc_cmdline_devices(); |
775 | if (r < 0) | |
a4a90e65 | 776 | return r; |
141a79f4 | 777 | |
a4a90e65 | 778 | return 0; |
e23a0ce8 | 779 | } |
a4a90e65 | 780 | |
7a44c7e3 | 781 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |