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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
6b1dc2bd | 2 | |
6b1dc2bd | 3 | #include <errno.h> |
07630cea | 4 | #include <stdio.h> |
6b1dc2bd LP |
5 | #include <unistd.h> |
6 | ||
b5efdb8a | 7 | #include "alloc-util.h" |
3ffd4af2 | 8 | #include "fd-util.h" |
0d39fa9c | 9 | #include "fileio.h" |
98bad05e | 10 | #include "fs-util.h" |
d15d0333 | 11 | #include "fstab-util.h" |
07630cea LP |
12 | #include "generator.h" |
13 | #include "log.h" | |
a4ef3e4d | 14 | #include "main-func.h" |
07630cea | 15 | #include "mkdir.h" |
6b1dc2bd | 16 | #include "mount-setup.h" |
4349cd7c | 17 | #include "mount-util.h" |
049af8ad | 18 | #include "mountpoint-util.h" |
6bedfcbb | 19 | #include "parse-util.h" |
07630cea | 20 | #include "path-util.h" |
4e731273 | 21 | #include "proc-cmdline.h" |
6b1dc2bd | 22 | #include "special.h" |
98bad05e | 23 | #include "specifier.h" |
8fcde012 | 24 | #include "stat-util.h" |
07630cea | 25 | #include "string-util.h" |
059cb385 | 26 | #include "strv.h" |
07630cea LP |
27 | #include "unit-name.h" |
28 | #include "util.h" | |
689aede8 | 29 | #include "virt.h" |
91214a37 | 30 | #include "volatile-util.h" |
6b1dc2bd | 31 | |
4191418b ZJS |
32 | typedef enum MountpointFlags { |
33 | NOAUTO = 1 << 0, | |
34 | NOFAIL = 1 << 1, | |
35 | AUTOMOUNT = 1 << 2, | |
da495a03 | 36 | MAKEFS = 1 << 3, |
7f2806d5 | 37 | GROWFS = 1 << 4, |
f42aa416 | 38 | RWONLY = 1 << 5, |
4191418b ZJS |
39 | } MountpointFlags; |
40 | ||
7a44c7e3 ZJS |
41 | static const char *arg_dest = NULL; |
42 | static const char *arg_dest_late = NULL; | |
e48fdd84 | 43 | static bool arg_fstab_enabled = true; |
567a5307 | 44 | static bool arg_swap_enabled = true; |
6db615c1 LP |
45 | static char *arg_root_what = NULL; |
46 | static char *arg_root_fstype = NULL; | |
47 | static char *arg_root_options = NULL; | |
2f3dfc6f | 48 | static char *arg_root_hash = NULL; |
6db615c1 | 49 | static int arg_root_rw = -1; |
9f103625 TH |
50 | static char *arg_usr_what = NULL; |
51 | static char *arg_usr_fstype = NULL; | |
52 | static char *arg_usr_options = NULL; | |
91214a37 | 53 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 54 | |
a4ef3e4d YW |
55 | STATIC_DESTRUCTOR_REGISTER(arg_root_what, freep); |
56 | STATIC_DESTRUCTOR_REGISTER(arg_root_fstype, freep); | |
57 | STATIC_DESTRUCTOR_REGISTER(arg_root_options, freep); | |
58 | STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep); | |
59 | STATIC_DESTRUCTOR_REGISTER(arg_usr_what, freep); | |
60 | STATIC_DESTRUCTOR_REGISTER(arg_usr_fstype, freep); | |
61 | STATIC_DESTRUCTOR_REGISTER(arg_usr_options, freep); | |
62 | ||
d5cc4be2 LP |
63 | static int write_options(FILE *f, const char *options) { |
64 | _cleanup_free_ char *o = NULL; | |
65 | ||
66 | if (isempty(options)) | |
67 | return 0; | |
68 | ||
69 | if (streq(options, "defaults")) | |
70 | return 0; | |
71 | ||
98bad05e | 72 | o = specifier_escape(options); |
d5cc4be2 LP |
73 | if (!o) |
74 | return log_oom(); | |
75 | ||
76 | fprintf(f, "Options=%s\n", o); | |
77 | return 1; | |
78 | } | |
79 | ||
19d0833b LP |
80 | static int write_what(FILE *f, const char *what) { |
81 | _cleanup_free_ char *w = NULL; | |
82 | ||
98bad05e | 83 | w = specifier_escape(what); |
19d0833b LP |
84 | if (!w) |
85 | return log_oom(); | |
86 | ||
87 | fprintf(f, "What=%s\n", w); | |
88 | return 1; | |
89 | } | |
90 | ||
5607d856 ZJS |
91 | static int add_swap( |
92 | const char *what, | |
93 | struct mntent *me, | |
4191418b | 94 | MountpointFlags flags) { |
5607d856 | 95 | |
fb883e75 | 96 | _cleanup_free_ char *name = NULL; |
7fd1b19b | 97 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 98 | int r; |
6b1dc2bd LP |
99 | |
100 | assert(what); | |
101 | assert(me); | |
102 | ||
567a5307 | 103 | if (!arg_swap_enabled) { |
104 | log_info("Swap unit generation disabled on kernel command line, ignoring fstab swap entry for %s.", what); | |
105 | return 0; | |
106 | } | |
107 | ||
00b4ffde LP |
108 | if (access("/proc/swaps", F_OK) < 0) { |
109 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
110 | return 0; | |
111 | } | |
112 | ||
75f86906 | 113 | if (detect_container() > 0) { |
689aede8 LP |
114 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
115 | return 0; | |
116 | } | |
117 | ||
7410616c LP |
118 | r = unit_name_from_path(what, ".swap", &name); |
119 | if (r < 0) | |
120 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 121 | |
ed4ad488 | 122 | r = generator_open_unit_file(arg_dest, fstab_path(), name, &f); |
fb883e75 ZJS |
123 | if (r < 0) |
124 | return r; | |
0d536673 | 125 | |
ed4ad488 ZJS |
126 | fprintf(f, |
127 | "[Unit]\n" | |
a7e88558 LP |
128 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
129 | "SourcePath=%s\n", | |
ed4ad488 | 130 | fstab_path()); |
19d0833b | 131 | |
a7e88558 LP |
132 | r = generator_write_blockdev_dependency(f, what); |
133 | if (r < 0) | |
134 | return r; | |
135 | ||
136 | fprintf(f, | |
137 | "\n" | |
138 | "[Swap]\n"); | |
139 | ||
19d0833b LP |
140 | r = write_what(f, what); |
141 | if (r < 0) | |
142 | return r; | |
6b1dc2bd | 143 | |
d5cc4be2 LP |
144 | r = write_options(f, me->mnt_opts); |
145 | if (r < 0) | |
146 | return r; | |
6b1dc2bd | 147 | |
47cb901e | 148 | r = fflush_and_check(f); |
23bbb0de | 149 | if (r < 0) |
fb883e75 | 150 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 151 | |
b3208b66 | 152 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 153 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
154 | if (r < 0) |
155 | return r; | |
156 | ||
da495a03 ZJS |
157 | if (flags & MAKEFS) { |
158 | r = generator_hook_up_mkswap(arg_dest, what); | |
159 | if (r < 0) | |
160 | return r; | |
161 | } | |
162 | ||
7f2806d5 ZJS |
163 | if (flags & GROWFS) |
164 | /* TODO: swap devices must be wiped and recreated */ | |
165 | log_warning("%s: growing swap devices is currently unsupported.", what); | |
166 | ||
4191418b | 167 | if (!(flags & NOAUTO)) { |
630d30d3 | 168 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
4191418b | 169 | (flags & NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
170 | if (r < 0) |
171 | return r; | |
4e82fe52 TG |
172 | } |
173 | ||
d0aa9ce5 | 174 | return 0; |
6b1dc2bd LP |
175 | } |
176 | ||
6b1dc2bd LP |
177 | static bool mount_is_network(struct mntent *me) { |
178 | assert(me); | |
179 | ||
b9f111b9 ZJS |
180 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
181 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
182 | } |
183 | ||
3d22d1ab TG |
184 | static bool mount_in_initrd(struct mntent *me) { |
185 | assert(me); | |
186 | ||
b9f111b9 ZJS |
187 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
188 | streq(me->mnt_dir, "/usr"); | |
3d22d1ab TG |
189 | } |
190 | ||
33a4c983 LP |
191 | static int write_timeout( |
192 | FILE *f, | |
193 | const char *where, | |
194 | const char *opts, | |
195 | const char *filter, | |
196 | const char *variable) { | |
197 | ||
deb0a77c MO |
198 | _cleanup_free_ char *timeout = NULL; |
199 | char timespan[FORMAT_TIMESPAN_MAX]; | |
200 | usec_t u; | |
201 | int r; | |
202 | ||
110773f6 | 203 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL); |
deb0a77c MO |
204 | if (r < 0) |
205 | return log_warning_errno(r, "Failed to parse options: %m"); | |
206 | if (r == 0) | |
207 | return 0; | |
208 | ||
0004f698 | 209 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
210 | if (r < 0) { |
211 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
212 | return 0; | |
213 | } | |
214 | ||
110773f6 | 215 | fprintf(f, "%s=%s\n", variable, format_timespan(timespan, sizeof(timespan), u, 0)); |
deb0a77c MO |
216 | |
217 | return 0; | |
218 | } | |
2e852276 | 219 | |
110773f6 CH |
220 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
221 | return write_timeout(f, where, opts, | |
222 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
223 | } | |
224 | ||
225 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
226 | return write_timeout(f, where, opts, | |
227 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
228 | } | |
229 | ||
33a4c983 LP |
230 | static int write_dependency( |
231 | FILE *f, | |
232 | const char *opts, | |
233 | const char *filter, | |
234 | const char *format) { | |
235 | ||
3519d230 KZ |
236 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
237 | _cleanup_free_ char *res = NULL; | |
238 | char **s; | |
239 | int r; | |
240 | ||
241 | assert(f); | |
242 | assert(opts); | |
243 | ||
ae325185 | 244 | r = fstab_extract_values(opts, filter, &names); |
3519d230 KZ |
245 | if (r < 0) |
246 | return log_warning_errno(r, "Failed to parse options: %m"); | |
247 | if (r == 0) | |
248 | return 0; | |
249 | ||
250 | STRV_FOREACH(s, names) { | |
251 | char *x; | |
252 | ||
df7c4eb6 | 253 | r = unit_name_mangle_with_suffix(*s, "as dependency", 0, ".mount", &x); |
3519d230 KZ |
254 | if (r < 0) |
255 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
33a4c983 | 256 | |
3519d230 KZ |
257 | r = strv_consume(&units, x); |
258 | if (r < 0) | |
259 | return log_oom(); | |
260 | } | |
261 | ||
262 | if (units) { | |
263 | res = strv_join(units, " "); | |
264 | if (!res) | |
265 | return log_oom(); | |
56e577c6 LP |
266 | |
267 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
ae325185 | 268 | fprintf(f, format, res); |
56e577c6 | 269 | REENABLE_WARNING; |
3519d230 KZ |
270 | } |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
ae325185 | 275 | static int write_after(FILE *f, const char *opts) { |
33a4c983 LP |
276 | return write_dependency(f, opts, |
277 | "x-systemd.after", "After=%1$s\n"); | |
ae325185 RB |
278 | } |
279 | ||
280 | static int write_requires_after(FILE *f, const char *opts) { | |
281 | return write_dependency(f, opts, | |
282 | "x-systemd.requires", "After=%1$s\nRequires=%1$s\n"); | |
283 | } | |
284 | ||
285 | static int write_before(FILE *f, const char *opts) { | |
286 | return write_dependency(f, opts, | |
287 | "x-systemd.before", "Before=%1$s\n"); | |
288 | } | |
289 | ||
3519d230 | 290 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
98bad05e | 291 | _cleanup_strv_free_ char **paths = NULL, **paths_escaped = NULL; |
3519d230 KZ |
292 | _cleanup_free_ char *res = NULL; |
293 | int r; | |
294 | ||
295 | assert(f); | |
296 | assert(opts); | |
297 | ||
298 | r = fstab_extract_values(opts, "x-systemd.requires-mounts-for", &paths); | |
299 | if (r < 0) | |
300 | return log_warning_errno(r, "Failed to parse options: %m"); | |
301 | if (r == 0) | |
302 | return 0; | |
303 | ||
98bad05e LP |
304 | r = specifier_escape_strv(paths, &paths_escaped); |
305 | if (r < 0) | |
306 | return log_error_errno(r, "Failed to escape paths: %m"); | |
307 | ||
308 | res = strv_join(paths_escaped, " "); | |
3519d230 KZ |
309 | if (!res) |
310 | return log_oom(); | |
311 | ||
312 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
6371e69b FB |
317 | static int write_extra_dependencies(FILE *f, const char *opts) { |
318 | int r; | |
319 | ||
320 | assert(f); | |
321 | ||
322 | if (opts) { | |
323 | r = write_after(f, opts); | |
324 | if (r < 0) | |
325 | return r; | |
326 | r = write_requires_after(f, opts); | |
327 | if (r < 0) | |
328 | return r; | |
329 | r = write_before(f, opts); | |
330 | if (r < 0) | |
331 | return r; | |
332 | r = write_requires_mounts_for(f, opts); | |
333 | if (r < 0) | |
334 | return r; | |
335 | } | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
e8d2f6cd | 340 | static int add_mount( |
91214a37 | 341 | const char *dest, |
e8d2f6cd LP |
342 | const char *what, |
343 | const char *where, | |
634735b5 | 344 | const char *original_where, |
6db615c1 | 345 | const char *fstype, |
e8d2f6cd LP |
346 | const char *opts, |
347 | int passno, | |
4191418b | 348 | MountpointFlags flags, |
e8d2f6cd | 349 | const char *post, |
e8d2f6cd | 350 | const char *source) { |
e48fdd84 | 351 | |
7fd1b19b | 352 | _cleanup_free_ char |
da495a03 | 353 | *name = NULL, |
fb883e75 | 354 | *automount_name = NULL, |
98bad05e LP |
355 | *filtered = NULL, |
356 | *where_escaped = NULL; | |
be02c1cf | 357 | _cleanup_strv_free_ char **wanted_by = NULL, **required_by = NULL; |
7fd1b19b | 358 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 359 | int r; |
6b1dc2bd LP |
360 | |
361 | assert(what); | |
362 | assert(where); | |
5e398e54 | 363 | assert(opts); |
0d3d3be1 | 364 | assert(post); |
5e398e54 | 365 | assert(source); |
6b1dc2bd | 366 | |
6db615c1 | 367 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
368 | return 0; |
369 | ||
370 | if (!is_path(where)) { | |
371 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
372 | return 0; | |
373 | } | |
374 | ||
375 | if (mount_point_is_api(where) || | |
376 | mount_point_ignore(where)) | |
377 | return 0; | |
378 | ||
be02c1cf AR |
379 | r = fstab_extract_values(opts, "x-systemd.wanted-by", &wanted_by); |
380 | if (r < 0) | |
381 | return r; | |
382 | ||
383 | r = fstab_extract_values(opts, "x-systemd.required-by", &required_by); | |
384 | if (r < 0) | |
385 | return r; | |
386 | ||
e48fdd84 | 387 | if (path_equal(where, "/")) { |
4191418b | 388 | if (flags & NOAUTO) |
2e852276 | 389 | log_warning("Ignoring \"noauto\" for root device"); |
4191418b | 390 | if (flags & NOFAIL) |
2e852276 | 391 | log_warning("Ignoring \"nofail\" for root device"); |
4191418b | 392 | if (flags & AUTOMOUNT) |
2e852276 | 393 | log_warning("Ignoring automount option for root device"); |
be02c1cf AR |
394 | if (!strv_isempty(wanted_by)) |
395 | log_warning("Ignoring \"x-systemd.wanted-by=\" for root device"); | |
396 | if (!strv_isempty(required_by)) | |
397 | log_warning("Ignoring \"x-systemd.required-by=\" for root device"); | |
2e852276 | 398 | |
be02c1cf AR |
399 | required_by = strv_free(required_by); |
400 | wanted_by = strv_free(wanted_by); | |
4191418b | 401 | SET_FLAG(flags, NOAUTO | NOFAIL | AUTOMOUNT, false); |
e48fdd84 LP |
402 | } |
403 | ||
7410616c LP |
404 | r = unit_name_from_path(where, ".mount", &name); |
405 | if (r < 0) | |
406 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 407 | |
ed4ad488 | 408 | r = generator_open_unit_file(dest, fstab_path(), name, &f); |
fb883e75 ZJS |
409 | if (r < 0) |
410 | return r; | |
0d536673 | 411 | |
5e398e54 | 412 | fprintf(f, |
c3834f9b | 413 | "[Unit]\n" |
a7e88558 LP |
414 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
415 | "SourcePath=%s\n", | |
c3834f9b | 416 | source); |
6b1dc2bd | 417 | |
4191418b | 418 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !(flags & AUTOMOUNT) && |
65e1dee7 N |
419 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
420 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
421 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
422 | * As we are making 'bg' mounts look like an 'fg' mount to | |
423 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
424 | * we need to explicitly preserve that default, and also ensure | |
425 | * the systemd mount-timeout doesn't interfere. | |
426 | * By placing these options first, they can be over-ridden by | |
427 | * settings in /etc/fstab. */ | |
e66d2eee | 428 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,nofail,", opts, ",fg"); |
4191418b | 429 | SET_FLAG(flags, NOFAIL, true); |
65e1dee7 N |
430 | } |
431 | ||
6371e69b FB |
432 | r = write_extra_dependencies(f, opts); |
433 | if (r < 0) | |
434 | return r; | |
3519d230 | 435 | |
e48fdd84 | 436 | if (passno != 0) { |
91214a37 | 437 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
438 | if (r < 0) |
439 | return r; | |
440 | } | |
64e70e4b | 441 | |
a7e88558 LP |
442 | r = generator_write_blockdev_dependency(f, what); |
443 | if (r < 0) | |
444 | return r; | |
445 | ||
446 | fprintf(f, | |
447 | "\n" | |
448 | "[Mount]\n"); | |
449 | ||
634735b5 CW |
450 | if (original_where) |
451 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
98bad05e LP |
452 | |
453 | where_escaped = specifier_escape(where); | |
454 | if (!where_escaped) | |
455 | return log_oom(); | |
456 | fprintf(f, "Where=%s\n", where_escaped); | |
6db615c1 | 457 | |
19d0833b LP |
458 | r = write_what(f, what); |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
98bad05e LP |
462 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
463 | _cleanup_free_ char *t; | |
464 | ||
465 | t = specifier_escape(fstype); | |
466 | if (!t) | |
467 | return -ENOMEM; | |
468 | ||
469 | fprintf(f, "Type=%s\n", t); | |
470 | } | |
6b1dc2bd | 471 | |
91214a37 | 472 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
473 | if (r < 0) |
474 | return r; | |
475 | ||
4195077a MK |
476 | r = generator_write_device_deps(dest, what, where, opts); |
477 | if (r < 0) | |
478 | return r; | |
479 | ||
110773f6 CH |
480 | r = write_mount_timeout(f, where, opts); |
481 | if (r < 0) | |
482 | return r; | |
483 | ||
d5cc4be2 LP |
484 | r = write_options(f, filtered); |
485 | if (r < 0) | |
486 | return r; | |
5e398e54 | 487 | |
f42aa416 MH |
488 | if (flags & RWONLY) |
489 | fprintf(f, "ReadWriteOnly=yes\n"); | |
490 | ||
4652c56c ZJS |
491 | r = fflush_and_check(f); |
492 | if (r < 0) | |
fb883e75 | 493 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 494 | |
da495a03 ZJS |
495 | if (flags & MAKEFS) { |
496 | r = generator_hook_up_mkfs(dest, what, where, fstype); | |
497 | if (r < 0) | |
498 | return r; | |
499 | } | |
500 | ||
7f2806d5 ZJS |
501 | if (flags & GROWFS) { |
502 | r = generator_hook_up_growfs(dest, where, post); | |
503 | if (r < 0) | |
504 | return r; | |
505 | } | |
506 | ||
be02c1cf AR |
507 | if (!FLAGS_SET(flags, AUTOMOUNT)) { |
508 | if (!FLAGS_SET(flags, NOAUTO) && strv_isempty(wanted_by) && strv_isempty(required_by)) { | |
509 | r = generator_add_symlink(dest, post, | |
510 | (flags & NOFAIL) ? "wants" : "requires", name); | |
511 | if (r < 0) | |
512 | return r; | |
513 | } else { | |
514 | char **s; | |
515 | ||
516 | STRV_FOREACH(s, wanted_by) { | |
517 | r = generator_add_symlink(dest, *s, "wants", name); | |
518 | if (r < 0) | |
519 | return r; | |
520 | } | |
521 | ||
522 | STRV_FOREACH(s, required_by) { | |
523 | r = generator_add_symlink(dest, *s, "requires", name); | |
524 | if (r < 0) | |
525 | return r; | |
526 | } | |
527 | } | |
528 | } else { | |
7410616c LP |
529 | r = unit_name_from_path(where, ".automount", &automount_name); |
530 | if (r < 0) | |
531 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 532 | |
8a7033ac | 533 | f = safe_fclose(f); |
6b1dc2bd | 534 | |
ed4ad488 | 535 | r = generator_open_unit_file(dest, fstab_path(), automount_name, &f); |
fb883e75 ZJS |
536 | if (r < 0) |
537 | return r; | |
0d536673 | 538 | |
6b1dc2bd | 539 | fprintf(f, |
6b1dc2bd | 540 | "[Unit]\n" |
c3834f9b LP |
541 | "SourcePath=%s\n" |
542 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
543 | source); |
544 | ||
700e07ff | 545 | fprintf(f, |
bd10a84b | 546 | "\n" |
6b1dc2bd LP |
547 | "[Automount]\n" |
548 | "Where=%s\n", | |
98bad05e | 549 | where_escaped); |
6b1dc2bd | 550 | |
336b5c61 | 551 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
552 | if (r < 0) |
553 | return r; | |
554 | ||
4652c56c ZJS |
555 | r = fflush_and_check(f); |
556 | if (r < 0) | |
fb883e75 | 557 | return log_error_errno(r, "Failed to write unit file %s: %m", automount_name); |
6b1dc2bd | 558 | |
630d30d3 | 559 | r = generator_add_symlink(dest, post, |
4191418b | 560 | (flags & NOFAIL) ? "wants" : "requires", automount_name); |
630d30d3 ZJS |
561 | if (r < 0) |
562 | return r; | |
6b1dc2bd LP |
563 | } |
564 | ||
d0aa9ce5 | 565 | return 0; |
6b1dc2bd LP |
566 | } |
567 | ||
e48fdd84 | 568 | static int parse_fstab(bool initrd) { |
6db615c1 | 569 | _cleanup_endmntent_ FILE *f = NULL; |
ed4ad488 | 570 | const char *fstab; |
6b1dc2bd | 571 | struct mntent *me; |
e48fdd84 | 572 | int r = 0; |
6b1dc2bd | 573 | |
ed4ad488 ZJS |
574 | fstab = initrd ? "/sysroot/etc/fstab" : fstab_path(); |
575 | log_debug("Parsing %s...", fstab); | |
01a0f7d0 | 576 | |
ed4ad488 | 577 | f = setmntent(fstab, "re"); |
6b1dc2bd LP |
578 | if (!f) { |
579 | if (errno == ENOENT) | |
580 | return 0; | |
581 | ||
ed4ad488 | 582 | return log_error_errno(errno, "Failed to open %s: %m", fstab); |
6b1dc2bd LP |
583 | } |
584 | ||
585 | while ((me = getmntent(f))) { | |
634735b5 | 586 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
f42aa416 | 587 | bool makefs, growfs, noauto, nofail, rwonly; |
6b1dc2bd LP |
588 | int k; |
589 | ||
3d22d1ab TG |
590 | if (initrd && !mount_in_initrd(me)) |
591 | continue; | |
592 | ||
6b1dc2bd | 593 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
594 | if (!what) |
595 | return log_oom(); | |
596 | ||
a3e7ea02 | 597 | if (is_device_path(what) && path_is_read_only_fs("/sys") > 0) { |
689aede8 LP |
598 | log_info("Running in a container, ignoring fstab device entry for %s.", what); |
599 | continue; | |
600 | } | |
601 | ||
98eda38a | 602 | where = strdup(me->mnt_dir); |
e48fdd84 | 603 | if (!where) |
5862d652 | 604 | return log_oom(); |
6b1dc2bd | 605 | |
634735b5 | 606 | if (is_path(where)) { |
858d36c1 | 607 | path_simplify(where, false); |
f1a2c758 | 608 | |
634735b5 CW |
609 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
610 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
611 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
612 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
f1a2c758 | 613 | * target is the final directory. */ |
634735b5 CW |
614 | r = chase_symlinks(where, initrd ? "/sysroot" : NULL, |
615 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, | |
a5648b80 | 616 | &canonical_where, NULL); |
f1a2c758 LP |
617 | if (r < 0) /* If we can't canonicalize we continue on as if it wasn't a symlink */ |
618 | log_debug_errno(r, "Failed to read symlink target for %s, ignoring: %m", where); | |
619 | else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */ | |
620 | canonical_where = mfree(canonical_where); | |
621 | else | |
622 | log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where); | |
634735b5 | 623 | } |
6b1dc2bd | 624 | |
da495a03 | 625 | makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0"); |
7f2806d5 | 626 | growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0"); |
f42aa416 | 627 | rwonly = fstab_test_option(me->mnt_opts, "x-systemd.rw-only\0"); |
b9f111b9 ZJS |
628 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
629 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
f1a2c758 | 630 | |
ac1d4c79 | 631 | log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s noauto=%s nofail=%s", |
5607d856 | 632 | what, where, me->mnt_type, |
ac1d4c79 | 633 | yes_no(makefs), yes_no(growfs), |
5607d856 | 634 | yes_no(noauto), yes_no(nofail)); |
6b1dc2bd LP |
635 | |
636 | if (streq(me->mnt_type, "swap")) | |
4191418b | 637 | k = add_swap(what, me, |
7f2806d5 | 638 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL); |
5e398e54 | 639 | else { |
5607d856 | 640 | bool automount; |
80c3b720 | 641 | const char *post; |
5e398e54 | 642 | |
b9f111b9 ZJS |
643 | automount = fstab_test_option(me->mnt_opts, |
644 | "comment=systemd.automount\0" | |
645 | "x-systemd.automount\0"); | |
e48fdd84 | 646 | if (initrd) |
700e07ff | 647 | post = SPECIAL_INITRD_FS_TARGET; |
e48fdd84 | 648 | else if (mount_is_network(me)) |
0c17fbce | 649 | post = SPECIAL_REMOTE_FS_TARGET; |
e48fdd84 | 650 | else |
0c17fbce | 651 | post = SPECIAL_LOCAL_FS_TARGET; |
5e398e54 | 652 | |
91214a37 LP |
653 | k = add_mount(arg_dest, |
654 | what, | |
634735b5 CW |
655 | canonical_where ?: where, |
656 | canonical_where ? where: NULL, | |
6db615c1 LP |
657 | me->mnt_type, |
658 | me->mnt_opts, | |
659 | me->mnt_passno, | |
f42aa416 | 660 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL | automount*AUTOMOUNT | rwonly*RWONLY, |
6db615c1 | 661 | post, |
ed4ad488 | 662 | fstab); |
5e398e54 | 663 | } |
6b1dc2bd | 664 | |
7f2806d5 | 665 | if (r >= 0 && k < 0) |
6b1dc2bd LP |
666 | r = k; |
667 | } | |
668 | ||
6b1dc2bd LP |
669 | return r; |
670 | } | |
671 | ||
2e852276 | 672 | static int add_sysroot_mount(void) { |
75a59316 ZJS |
673 | _cleanup_free_ char *what = NULL; |
674 | const char *opts; | |
7163e1ca | 675 | int r; |
5e398e54 | 676 | |
093c2cfe TH |
677 | if (isempty(arg_root_what)) { |
678 | log_debug("Could not find a root= entry on the kernel command line."); | |
679 | return 0; | |
135b5212 | 680 | } |
5e398e54 | 681 | |
138f4c69 LP |
682 | if (streq(arg_root_what, "gpt-auto")) { |
683 | /* This is handled by the gpt-auto generator */ | |
684 | log_debug("Skipping root directory handling, as gpt-auto was requested."); | |
685 | return 0; | |
686 | } | |
687 | ||
e34e72fb | 688 | if (path_equal(arg_root_what, "/dev/nfs")) { |
3ade16c9 HH |
689 | /* This is handled by the kernel or the initrd */ |
690 | log_debug("Skipping root directory handling, as /dev/nfs was requested."); | |
691 | return 0; | |
692 | } | |
693 | ||
093c2cfe TH |
694 | what = fstab_node_to_udev_node(arg_root_what); |
695 | if (!what) | |
171181bc | 696 | return log_oom(); |
093c2cfe | 697 | |
6db615c1 | 698 | if (!arg_root_options) |
75a59316 ZJS |
699 | opts = arg_root_rw > 0 ? "rw" : "ro"; |
700 | else if (arg_root_rw >= 0 || | |
d15d0333 | 701 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 702 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
703 | else |
704 | opts = arg_root_options; | |
5e398e54 | 705 | |
6db615c1 | 706 | log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype)); |
7163e1ca DD |
707 | |
708 | if (is_device_path(what)) { | |
709 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
710 | if (r < 0) | |
711 | return r; | |
712 | } | |
713 | ||
91214a37 LP |
714 | return add_mount(arg_dest, |
715 | what, | |
6db615c1 | 716 | "/sysroot", |
634735b5 | 717 | NULL, |
6db615c1 | 718 | arg_root_fstype, |
75a59316 | 719 | opts, |
f113f8e3 | 720 | is_device_path(what) ? 1 : 0, /* passno */ |
7f2806d5 | 721 | 0, /* makefs off, growfs off, noauto off, nofail off, automount off */ |
6db615c1 LP |
722 | SPECIAL_INITRD_ROOT_FS_TARGET, |
723 | "/proc/cmdline"); | |
5e398e54 TG |
724 | } |
725 | ||
2e852276 | 726 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
727 | _cleanup_free_ char *what = NULL; |
728 | const char *opts; | |
729 | ||
730 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
731 | return 0; | |
732 | ||
733 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 734 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 735 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
736 | if (!arg_usr_what) |
737 | return log_oom(); | |
738 | } | |
739 | ||
740 | if (arg_root_fstype && !arg_usr_fstype) { | |
741 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
742 | if (!arg_usr_fstype) |
743 | return log_oom(); | |
744 | } | |
745 | ||
746 | if (arg_root_options && !arg_usr_options) { | |
747 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
748 | if (!arg_usr_options) |
749 | return log_oom(); | |
750 | } | |
751 | ||
eb580002 | 752 | if (!arg_usr_what) |
9f103625 TH |
753 | return 0; |
754 | ||
755 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
756 | if (!what) |
757 | return log_oom(); | |
9f103625 | 758 | |
eb580002 MM |
759 | if (!arg_usr_options) |
760 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 761 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 762 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
763 | else |
764 | opts = arg_usr_options; | |
9f103625 TH |
765 | |
766 | log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype)); | |
91214a37 LP |
767 | return add_mount(arg_dest, |
768 | what, | |
9f103625 | 769 | "/sysroot/usr", |
634735b5 | 770 | NULL, |
9f103625 TH |
771 | arg_usr_fstype, |
772 | opts, | |
f113f8e3 | 773 | is_device_path(what) ? 1 : 0, /* passno */ |
4191418b | 774 | 0, |
104bc12f | 775 | SPECIAL_INITRD_FS_TARGET, |
9f103625 TH |
776 | "/proc/cmdline"); |
777 | } | |
778 | ||
91214a37 | 779 | static int add_volatile_root(void) { |
1de7f825 | 780 | |
91214a37 | 781 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is |
1de7f825 | 782 | * requested (or as an overlayfs), leaving only /usr from the root mount inside. */ |
91214a37 | 783 | |
1de7f825 | 784 | if (!IN_SET(arg_volatile_mode, VOLATILE_YES, VOLATILE_OVERLAY)) |
00bb366d | 785 | return 0; |
91214a37 | 786 | |
00bb366d | 787 | return generator_add_symlink(arg_dest, SPECIAL_INITRD_ROOT_FS_TARGET, "requires", |
312da637 | 788 | SYSTEM_DATA_UNIT_PATH "/" SPECIAL_VOLATILE_ROOT_SERVICE); |
91214a37 LP |
789 | } |
790 | ||
791 | static int add_volatile_var(void) { | |
792 | ||
793 | if (arg_volatile_mode != VOLATILE_STATE) | |
794 | return 0; | |
795 | ||
796 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
797 | ||
798 | return add_mount(arg_dest_late, | |
799 | "tmpfs", | |
800 | "/var", | |
634735b5 | 801 | NULL, |
91214a37 | 802 | "tmpfs", |
7d85383e | 803 | "mode=0755" TMPFS_LIMITS_VAR, |
91214a37 | 804 | 0, |
4191418b | 805 | 0, |
91214a37 LP |
806 | SPECIAL_LOCAL_FS_TARGET, |
807 | "/proc/cmdline"); | |
808 | } | |
809 | ||
96287a49 | 810 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 811 | int r; |
94734142 | 812 | |
9f103625 TH |
813 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
814 | * instance should take precedence. In the case of multiple rootflags= | |
815 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 816 | |
1d84ad94 | 817 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 818 | |
1d84ad94 | 819 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 820 | if (r < 0) |
059cb385 | 821 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 822 | else |
e48fdd84 | 823 | arg_fstab_enabled = r; |
94734142 | 824 | |
1d84ad94 LP |
825 | } else if (streq(key, "root")) { |
826 | ||
827 | if (proc_cmdline_value_missing(key, value)) | |
828 | return 0; | |
6db615c1 | 829 | |
f88dc3ed | 830 | if (free_and_strdup(&arg_root_what, value) < 0) |
6db615c1 LP |
831 | return log_oom(); |
832 | ||
1d84ad94 LP |
833 | } else if (streq(key, "rootfstype")) { |
834 | ||
835 | if (proc_cmdline_value_missing(key, value)) | |
836 | return 0; | |
6db615c1 | 837 | |
f88dc3ed | 838 | if (free_and_strdup(&arg_root_fstype, value) < 0) |
6db615c1 LP |
839 | return log_oom(); |
840 | ||
1d84ad94 | 841 | } else if (streq(key, "rootflags")) { |
6db615c1 | 842 | |
1d84ad94 LP |
843 | if (proc_cmdline_value_missing(key, value)) |
844 | return 0; | |
845 | ||
6c782b7a | 846 | if (!strextend_with_separator(&arg_root_options, ",", value, NULL)) |
6db615c1 LP |
847 | return log_oom(); |
848 | ||
2f3dfc6f LP |
849 | } else if (streq(key, "roothash")) { |
850 | ||
851 | if (proc_cmdline_value_missing(key, value)) | |
852 | return 0; | |
853 | ||
854 | if (free_and_strdup(&arg_root_hash, value) < 0) | |
855 | return log_oom(); | |
6db615c1 | 856 | |
1d84ad94 LP |
857 | } else if (streq(key, "mount.usr")) { |
858 | ||
859 | if (proc_cmdline_value_missing(key, value)) | |
860 | return 0; | |
9f103625 TH |
861 | |
862 | if (free_and_strdup(&arg_usr_what, value) < 0) | |
863 | return log_oom(); | |
864 | ||
1d84ad94 LP |
865 | } else if (streq(key, "mount.usrfstype")) { |
866 | ||
867 | if (proc_cmdline_value_missing(key, value)) | |
868 | return 0; | |
9f103625 TH |
869 | |
870 | if (free_and_strdup(&arg_usr_fstype, value) < 0) | |
871 | return log_oom(); | |
872 | ||
1d84ad94 | 873 | } else if (streq(key, "mount.usrflags")) { |
9f103625 | 874 | |
1d84ad94 LP |
875 | if (proc_cmdline_value_missing(key, value)) |
876 | return 0; | |
877 | ||
6c782b7a | 878 | if (!strextend_with_separator(&arg_usr_options, ",", value, NULL)) |
9f103625 TH |
879 | return log_oom(); |
880 | ||
6db615c1 LP |
881 | } else if (streq(key, "rw") && !value) |
882 | arg_root_rw = true; | |
883 | else if (streq(key, "ro") && !value) | |
884 | arg_root_rw = false; | |
91214a37 LP |
885 | else if (streq(key, "systemd.volatile")) { |
886 | VolatileMode m; | |
887 | ||
888 | if (value) { | |
889 | m = volatile_mode_from_string(value); | |
890 | if (m < 0) | |
891 | log_warning("Failed to parse systemd.volatile= argument: %s", value); | |
892 | else | |
893 | arg_volatile_mode = m; | |
894 | } else | |
895 | arg_volatile_mode = VOLATILE_YES; | |
567a5307 | 896 | |
897 | } else if (streq(key, "systemd.swap")) { | |
898 | ||
899 | r = value ? parse_boolean(value) : 1; | |
900 | if (r < 0) | |
901 | log_warning("Failed to parse systemd.swap switch %s. Ignoring.", value); | |
902 | else | |
903 | arg_swap_enabled = r; | |
91214a37 | 904 | } |
94734142 | 905 | |
d0aa9ce5 | 906 | return 0; |
94734142 LP |
907 | } |
908 | ||
2f3dfc6f LP |
909 | static int determine_root(void) { |
910 | /* If we have a root hash but no root device then Verity is used, and we use the "root" DM device as root. */ | |
911 | ||
912 | if (arg_root_what) | |
913 | return 0; | |
914 | ||
915 | if (!arg_root_hash) | |
916 | return 0; | |
917 | ||
918 | arg_root_what = strdup("/dev/mapper/root"); | |
919 | if (!arg_root_what) | |
920 | return log_oom(); | |
921 | ||
922 | log_info("Using verity root device %s.", arg_root_what); | |
923 | ||
924 | return 1; | |
925 | } | |
926 | ||
7a44c7e3 | 927 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
2572957e | 928 | int r, r2 = 0, r3 = 0; |
6b1dc2bd | 929 | |
7a44c7e3 ZJS |
930 | assert_se(arg_dest = dest); |
931 | assert_se(arg_dest_late = dest_late); | |
6b1dc2bd | 932 | |
1d84ad94 | 933 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 934 | if (r < 0) |
da927ba9 | 935 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 936 | |
2f3dfc6f LP |
937 | (void) determine_root(); |
938 | ||
9f103625 TH |
939 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
940 | if (in_initrd()) { | |
2e852276 | 941 | r = add_sysroot_mount(); |
003cba39 | 942 | |
2572957e | 943 | r2 = add_sysroot_usr_mount(); |
91214a37 | 944 | |
2572957e | 945 | r3 = add_volatile_root(); |
003cba39 | 946 | } else |
91214a37 | 947 | r = add_volatile_var(); |
5e398e54 | 948 | |
e48fdd84 LP |
949 | /* Honour /etc/fstab only when that's enabled */ |
950 | if (arg_fstab_enabled) { | |
e48fdd84 | 951 | /* Parse the local /etc/fstab, possibly from the initrd */ |
2572957e | 952 | r2 = parse_fstab(false); |
ac4785b0 | 953 | |
e48fdd84 | 954 | /* If running in the initrd also parse the /etc/fstab from the host */ |
2572957e ZJS |
955 | if (in_initrd()) |
956 | r3 = parse_fstab(true); | |
9b69569d ZJS |
957 | else |
958 | r3 = generator_enable_remount_fs_service(arg_dest); | |
e48fdd84 | 959 | } |
6b1dc2bd | 960 | |
2572957e | 961 | return r < 0 ? r : r2 < 0 ? r2 : r3; |
6b1dc2bd | 962 | } |
a4ef3e4d | 963 | |
7a44c7e3 | 964 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |