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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6b1dc2bd | 2 | |
6b1dc2bd | 3 | #include <errno.h> |
07630cea LP |
4 | #include <mntent.h> |
5 | #include <stdio.h> | |
6b1dc2bd LP |
6 | #include <string.h> |
7 | #include <unistd.h> | |
0d536673 | 8 | #include <stdio_ext.h> |
6b1dc2bd | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
3ffd4af2 | 11 | #include "fd-util.h" |
0d39fa9c | 12 | #include "fileio.h" |
98bad05e | 13 | #include "fs-util.h" |
d15d0333 | 14 | #include "fstab-util.h" |
07630cea LP |
15 | #include "generator.h" |
16 | #include "log.h" | |
17 | #include "mkdir.h" | |
6b1dc2bd | 18 | #include "mount-setup.h" |
4349cd7c | 19 | #include "mount-util.h" |
6bedfcbb | 20 | #include "parse-util.h" |
07630cea | 21 | #include "path-util.h" |
4e731273 | 22 | #include "proc-cmdline.h" |
6b1dc2bd | 23 | #include "special.h" |
98bad05e | 24 | #include "specifier.h" |
8fcde012 | 25 | #include "stat-util.h" |
07630cea | 26 | #include "string-util.h" |
059cb385 | 27 | #include "strv.h" |
07630cea LP |
28 | #include "unit-name.h" |
29 | #include "util.h" | |
689aede8 | 30 | #include "virt.h" |
91214a37 | 31 | #include "volatile-util.h" |
6b1dc2bd | 32 | |
4191418b ZJS |
33 | typedef enum MountpointFlags { |
34 | NOAUTO = 1 << 0, | |
35 | NOFAIL = 1 << 1, | |
36 | AUTOMOUNT = 1 << 2, | |
da495a03 | 37 | MAKEFS = 1 << 3, |
7f2806d5 | 38 | GROWFS = 1 << 4, |
4191418b ZJS |
39 | } MountpointFlags; |
40 | ||
6b1dc2bd | 41 | static const char *arg_dest = "/tmp"; |
91214a37 | 42 | static const char *arg_dest_late = "/tmp"; |
e48fdd84 | 43 | static bool arg_fstab_enabled = true; |
6db615c1 LP |
44 | static char *arg_root_what = NULL; |
45 | static char *arg_root_fstype = NULL; | |
46 | static char *arg_root_options = NULL; | |
2f3dfc6f | 47 | static char *arg_root_hash = NULL; |
6db615c1 | 48 | static int arg_root_rw = -1; |
9f103625 TH |
49 | static char *arg_usr_what = NULL; |
50 | static char *arg_usr_fstype = NULL; | |
51 | static char *arg_usr_options = NULL; | |
91214a37 | 52 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 53 | |
d5cc4be2 LP |
54 | static int write_options(FILE *f, const char *options) { |
55 | _cleanup_free_ char *o = NULL; | |
56 | ||
57 | if (isempty(options)) | |
58 | return 0; | |
59 | ||
60 | if (streq(options, "defaults")) | |
61 | return 0; | |
62 | ||
98bad05e | 63 | o = specifier_escape(options); |
d5cc4be2 LP |
64 | if (!o) |
65 | return log_oom(); | |
66 | ||
67 | fprintf(f, "Options=%s\n", o); | |
68 | return 1; | |
69 | } | |
70 | ||
19d0833b LP |
71 | static int write_what(FILE *f, const char *what) { |
72 | _cleanup_free_ char *w = NULL; | |
73 | ||
98bad05e | 74 | w = specifier_escape(what); |
19d0833b LP |
75 | if (!w) |
76 | return log_oom(); | |
77 | ||
78 | fprintf(f, "What=%s\n", w); | |
79 | return 1; | |
80 | } | |
81 | ||
5607d856 ZJS |
82 | static int add_swap( |
83 | const char *what, | |
84 | struct mntent *me, | |
4191418b | 85 | MountpointFlags flags) { |
5607d856 | 86 | |
fb883e75 | 87 | _cleanup_free_ char *name = NULL; |
7fd1b19b | 88 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 89 | int r; |
6b1dc2bd LP |
90 | |
91 | assert(what); | |
92 | assert(me); | |
93 | ||
00b4ffde LP |
94 | if (access("/proc/swaps", F_OK) < 0) { |
95 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
96 | return 0; | |
97 | } | |
98 | ||
75f86906 | 99 | if (detect_container() > 0) { |
689aede8 LP |
100 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
101 | return 0; | |
102 | } | |
103 | ||
7410616c LP |
104 | r = unit_name_from_path(what, ".swap", &name); |
105 | if (r < 0) | |
106 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 107 | |
fb883e75 ZJS |
108 | r = generator_open_unit_file(arg_dest, "/etc/fstab", name, &f); |
109 | if (r < 0) | |
110 | return r; | |
0d536673 LP |
111 | |
112 | fputs("# Automatically generated by systemd-fstab-generator\n\n" | |
113 | "[Unit]\n" | |
114 | "SourcePath=/etc/fstab\n" | |
115 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n" | |
116 | "[Swap]\n", f); | |
19d0833b LP |
117 | |
118 | r = write_what(f, what); | |
119 | if (r < 0) | |
120 | return r; | |
6b1dc2bd | 121 | |
d5cc4be2 LP |
122 | r = write_options(f, me->mnt_opts); |
123 | if (r < 0) | |
124 | return r; | |
6b1dc2bd | 125 | |
47cb901e | 126 | r = fflush_and_check(f); |
23bbb0de | 127 | if (r < 0) |
fb883e75 | 128 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 129 | |
b3208b66 | 130 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 131 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
132 | if (r < 0) |
133 | return r; | |
134 | ||
da495a03 ZJS |
135 | if (flags & MAKEFS) { |
136 | r = generator_hook_up_mkswap(arg_dest, what); | |
137 | if (r < 0) | |
138 | return r; | |
139 | } | |
140 | ||
7f2806d5 ZJS |
141 | if (flags & GROWFS) |
142 | /* TODO: swap devices must be wiped and recreated */ | |
143 | log_warning("%s: growing swap devices is currently unsupported.", what); | |
144 | ||
4191418b | 145 | if (!(flags & NOAUTO)) { |
630d30d3 | 146 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
4191418b | 147 | (flags & NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
148 | if (r < 0) |
149 | return r; | |
4e82fe52 TG |
150 | } |
151 | ||
d0aa9ce5 | 152 | return 0; |
6b1dc2bd LP |
153 | } |
154 | ||
6b1dc2bd LP |
155 | static bool mount_is_network(struct mntent *me) { |
156 | assert(me); | |
157 | ||
b9f111b9 ZJS |
158 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
159 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
160 | } |
161 | ||
3d22d1ab TG |
162 | static bool mount_in_initrd(struct mntent *me) { |
163 | assert(me); | |
164 | ||
b9f111b9 ZJS |
165 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
166 | streq(me->mnt_dir, "/usr"); | |
3d22d1ab TG |
167 | } |
168 | ||
110773f6 | 169 | static int write_timeout(FILE *f, const char *where, const char *opts, |
0004f698 | 170 | const char *filter, const char *variable) { |
deb0a77c MO |
171 | _cleanup_free_ char *timeout = NULL; |
172 | char timespan[FORMAT_TIMESPAN_MAX]; | |
173 | usec_t u; | |
174 | int r; | |
175 | ||
110773f6 | 176 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL); |
deb0a77c MO |
177 | if (r < 0) |
178 | return log_warning_errno(r, "Failed to parse options: %m"); | |
179 | if (r == 0) | |
180 | return 0; | |
181 | ||
0004f698 | 182 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
183 | if (r < 0) { |
184 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
185 | return 0; | |
186 | } | |
187 | ||
110773f6 | 188 | fprintf(f, "%s=%s\n", variable, format_timespan(timespan, sizeof(timespan), u, 0)); |
deb0a77c MO |
189 | |
190 | return 0; | |
191 | } | |
2e852276 | 192 | |
110773f6 CH |
193 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
194 | return write_timeout(f, where, opts, | |
195 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
196 | } | |
197 | ||
198 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
199 | return write_timeout(f, where, opts, | |
200 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
201 | } | |
202 | ||
ae325185 RB |
203 | static int write_dependency(FILE *f, const char *opts, |
204 | const char *filter, const char *format) { | |
3519d230 KZ |
205 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
206 | _cleanup_free_ char *res = NULL; | |
207 | char **s; | |
208 | int r; | |
209 | ||
210 | assert(f); | |
211 | assert(opts); | |
212 | ||
ae325185 | 213 | r = fstab_extract_values(opts, filter, &names); |
3519d230 KZ |
214 | if (r < 0) |
215 | return log_warning_errno(r, "Failed to parse options: %m"); | |
216 | if (r == 0) | |
217 | return 0; | |
218 | ||
219 | STRV_FOREACH(s, names) { | |
220 | char *x; | |
221 | ||
37cbc1d5 | 222 | r = unit_name_mangle_with_suffix(*s, 0, ".mount", &x); |
3519d230 KZ |
223 | if (r < 0) |
224 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
225 | r = strv_consume(&units, x); | |
226 | if (r < 0) | |
227 | return log_oom(); | |
228 | } | |
229 | ||
230 | if (units) { | |
231 | res = strv_join(units, " "); | |
232 | if (!res) | |
233 | return log_oom(); | |
4a027e19 MP |
234 | #pragma GCC diagnostic push |
235 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
ae325185 | 236 | fprintf(f, format, res); |
4a027e19 | 237 | #pragma GCC diagnostic pop |
3519d230 KZ |
238 | } |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
ae325185 RB |
243 | static int write_after(FILE *f, const char *opts) { |
244 | return write_dependency(f, opts, "x-systemd.after", "After=%1$s\n"); | |
245 | } | |
246 | ||
247 | static int write_requires_after(FILE *f, const char *opts) { | |
248 | return write_dependency(f, opts, | |
249 | "x-systemd.requires", "After=%1$s\nRequires=%1$s\n"); | |
250 | } | |
251 | ||
252 | static int write_before(FILE *f, const char *opts) { | |
253 | return write_dependency(f, opts, | |
254 | "x-systemd.before", "Before=%1$s\n"); | |
255 | } | |
256 | ||
3519d230 | 257 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
98bad05e | 258 | _cleanup_strv_free_ char **paths = NULL, **paths_escaped = NULL; |
3519d230 KZ |
259 | _cleanup_free_ char *res = NULL; |
260 | int r; | |
261 | ||
262 | assert(f); | |
263 | assert(opts); | |
264 | ||
265 | r = fstab_extract_values(opts, "x-systemd.requires-mounts-for", &paths); | |
266 | if (r < 0) | |
267 | return log_warning_errno(r, "Failed to parse options: %m"); | |
268 | if (r == 0) | |
269 | return 0; | |
270 | ||
98bad05e LP |
271 | r = specifier_escape_strv(paths, &paths_escaped); |
272 | if (r < 0) | |
273 | return log_error_errno(r, "Failed to escape paths: %m"); | |
274 | ||
275 | res = strv_join(paths_escaped, " "); | |
3519d230 KZ |
276 | if (!res) |
277 | return log_oom(); | |
278 | ||
279 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
e8d2f6cd | 284 | static int add_mount( |
91214a37 | 285 | const char *dest, |
e8d2f6cd LP |
286 | const char *what, |
287 | const char *where, | |
634735b5 | 288 | const char *original_where, |
6db615c1 | 289 | const char *fstype, |
e8d2f6cd LP |
290 | const char *opts, |
291 | int passno, | |
4191418b | 292 | MountpointFlags flags, |
e8d2f6cd | 293 | const char *post, |
e8d2f6cd | 294 | const char *source) { |
e48fdd84 | 295 | |
7fd1b19b | 296 | _cleanup_free_ char |
da495a03 | 297 | *name = NULL, |
fb883e75 | 298 | *automount_name = NULL, |
98bad05e LP |
299 | *filtered = NULL, |
300 | *where_escaped = NULL; | |
7fd1b19b | 301 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 302 | int r; |
6b1dc2bd LP |
303 | |
304 | assert(what); | |
305 | assert(where); | |
5e398e54 | 306 | assert(opts); |
0d3d3be1 | 307 | assert(post); |
5e398e54 | 308 | assert(source); |
6b1dc2bd | 309 | |
6db615c1 | 310 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
311 | return 0; |
312 | ||
313 | if (!is_path(where)) { | |
314 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | if (mount_point_is_api(where) || | |
319 | mount_point_ignore(where)) | |
320 | return 0; | |
321 | ||
e48fdd84 | 322 | if (path_equal(where, "/")) { |
4191418b | 323 | if (flags & NOAUTO) |
2e852276 | 324 | log_warning("Ignoring \"noauto\" for root device"); |
4191418b | 325 | if (flags & NOFAIL) |
2e852276 | 326 | log_warning("Ignoring \"nofail\" for root device"); |
4191418b | 327 | if (flags & AUTOMOUNT) |
2e852276 ZJS |
328 | log_warning("Ignoring automount option for root device"); |
329 | ||
4191418b | 330 | SET_FLAG(flags, NOAUTO | NOFAIL | AUTOMOUNT, false); |
e48fdd84 LP |
331 | } |
332 | ||
7410616c LP |
333 | r = unit_name_from_path(where, ".mount", &name); |
334 | if (r < 0) | |
335 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 336 | |
fb883e75 ZJS |
337 | r = generator_open_unit_file(dest, "/etc/fstab", name, &f); |
338 | if (r < 0) | |
339 | return r; | |
0d536673 | 340 | |
5e398e54 | 341 | fprintf(f, |
c3834f9b LP |
342 | "[Unit]\n" |
343 | "SourcePath=%s\n" | |
344 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
345 | source); | |
6b1dc2bd | 346 | |
4191418b | 347 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !(flags & AUTOMOUNT) && |
65e1dee7 N |
348 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
349 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
350 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
351 | * As we are making 'bg' mounts look like an 'fg' mount to | |
352 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
353 | * we need to explicitly preserve that default, and also ensure | |
354 | * the systemd mount-timeout doesn't interfere. | |
355 | * By placing these options first, they can be over-ridden by | |
356 | * settings in /etc/fstab. */ | |
357 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,", opts, ",fg"); | |
4191418b | 358 | SET_FLAG(flags, NOFAIL, true); |
65e1dee7 N |
359 | } |
360 | ||
4191418b | 361 | if (!(flags & NOFAIL) && !(flags & AUTOMOUNT)) |
5ecdcf41 | 362 | fprintf(f, "Before=%s\n", post); |
6b1dc2bd | 363 | |
4191418b | 364 | if (!(flags & AUTOMOUNT) && opts) { |
ae325185 RB |
365 | r = write_after(f, opts); |
366 | if (r < 0) | |
367 | return r; | |
3519d230 | 368 | r = write_requires_after(f, opts); |
ae325185 RB |
369 | if (r < 0) |
370 | return r; | |
371 | r = write_before(f, opts); | |
3519d230 KZ |
372 | if (r < 0) |
373 | return r; | |
374 | r = write_requires_mounts_for(f, opts); | |
375 | if (r < 0) | |
376 | return r; | |
377 | } | |
378 | ||
e48fdd84 | 379 | if (passno != 0) { |
91214a37 | 380 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
381 | if (r < 0) |
382 | return r; | |
383 | } | |
64e70e4b | 384 | |
634735b5 CW |
385 | fprintf(f, "\n[Mount]\n"); |
386 | if (original_where) | |
387 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
98bad05e LP |
388 | |
389 | where_escaped = specifier_escape(where); | |
390 | if (!where_escaped) | |
391 | return log_oom(); | |
392 | fprintf(f, "Where=%s\n", where_escaped); | |
6db615c1 | 393 | |
19d0833b LP |
394 | r = write_what(f, what); |
395 | if (r < 0) | |
396 | return r; | |
397 | ||
98bad05e LP |
398 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
399 | _cleanup_free_ char *t; | |
400 | ||
401 | t = specifier_escape(fstype); | |
402 | if (!t) | |
403 | return -ENOMEM; | |
404 | ||
405 | fprintf(f, "Type=%s\n", t); | |
406 | } | |
6b1dc2bd | 407 | |
91214a37 | 408 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
409 | if (r < 0) |
410 | return r; | |
411 | ||
4195077a MK |
412 | r = generator_write_device_deps(dest, what, where, opts); |
413 | if (r < 0) | |
414 | return r; | |
415 | ||
110773f6 CH |
416 | r = write_mount_timeout(f, where, opts); |
417 | if (r < 0) | |
418 | return r; | |
419 | ||
d5cc4be2 LP |
420 | r = write_options(f, filtered); |
421 | if (r < 0) | |
422 | return r; | |
5e398e54 | 423 | |
4652c56c ZJS |
424 | r = fflush_and_check(f); |
425 | if (r < 0) | |
fb883e75 | 426 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 427 | |
da495a03 ZJS |
428 | if (flags & MAKEFS) { |
429 | r = generator_hook_up_mkfs(dest, what, where, fstype); | |
430 | if (r < 0) | |
431 | return r; | |
432 | } | |
433 | ||
7f2806d5 ZJS |
434 | if (flags & GROWFS) { |
435 | r = generator_hook_up_growfs(dest, where, post); | |
436 | if (r < 0) | |
437 | return r; | |
438 | } | |
439 | ||
4191418b | 440 | if (!(flags & NOAUTO) && !(flags & AUTOMOUNT)) { |
630d30d3 | 441 | r = generator_add_symlink(dest, post, |
4191418b | 442 | (flags & NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
443 | if (r < 0) |
444 | return r; | |
6b1dc2bd LP |
445 | } |
446 | ||
4191418b | 447 | if (flags & AUTOMOUNT) { |
7410616c LP |
448 | r = unit_name_from_path(where, ".automount", &automount_name); |
449 | if (r < 0) | |
450 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 451 | |
6b1dc2bd | 452 | fclose(f); |
6b1dc2bd | 453 | |
fb883e75 ZJS |
454 | r = generator_open_unit_file(dest, "/etc/fstab", automount_name, &f); |
455 | if (r < 0) | |
456 | return r; | |
0d536673 | 457 | |
6b1dc2bd | 458 | fprintf(f, |
6b1dc2bd | 459 | "[Unit]\n" |
c3834f9b LP |
460 | "SourcePath=%s\n" |
461 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
462 | source); |
463 | ||
0d3d3be1 | 464 | fprintf(f, "Before=%s\n", post); |
700e07ff | 465 | |
3519d230 | 466 | if (opts) { |
ae325185 RB |
467 | r = write_after(f, opts); |
468 | if (r < 0) | |
469 | return r; | |
3519d230 | 470 | r = write_requires_after(f, opts); |
ae325185 RB |
471 | if (r < 0) |
472 | return r; | |
473 | r = write_before(f, opts); | |
3519d230 KZ |
474 | if (r < 0) |
475 | return r; | |
476 | r = write_requires_mounts_for(f, opts); | |
477 | if (r < 0) | |
478 | return r; | |
479 | } | |
480 | ||
700e07ff | 481 | fprintf(f, |
bd10a84b | 482 | "\n" |
6b1dc2bd LP |
483 | "[Automount]\n" |
484 | "Where=%s\n", | |
98bad05e | 485 | where_escaped); |
6b1dc2bd | 486 | |
336b5c61 | 487 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
488 | if (r < 0) |
489 | return r; | |
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", automount_name); |
6b1dc2bd | 494 | |
630d30d3 | 495 | r = generator_add_symlink(dest, post, |
4191418b | 496 | (flags & NOFAIL) ? "wants" : "requires", automount_name); |
630d30d3 ZJS |
497 | if (r < 0) |
498 | return r; | |
6b1dc2bd LP |
499 | } |
500 | ||
d0aa9ce5 | 501 | return 0; |
6b1dc2bd LP |
502 | } |
503 | ||
e48fdd84 | 504 | static int parse_fstab(bool initrd) { |
6db615c1 | 505 | _cleanup_endmntent_ FILE *f = NULL; |
e48fdd84 | 506 | const char *fstab_path; |
6b1dc2bd | 507 | struct mntent *me; |
e48fdd84 | 508 | int r = 0; |
6b1dc2bd | 509 | |
e48fdd84 LP |
510 | fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab"; |
511 | f = setmntent(fstab_path, "re"); | |
6b1dc2bd LP |
512 | if (!f) { |
513 | if (errno == ENOENT) | |
514 | return 0; | |
515 | ||
592288a2 | 516 | return log_error_errno(errno, "Failed to open %s: %m", fstab_path); |
6b1dc2bd LP |
517 | } |
518 | ||
519 | while ((me = getmntent(f))) { | |
634735b5 | 520 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
7f2806d5 | 521 | bool makefs, growfs, noauto, nofail; |
6b1dc2bd LP |
522 | int k; |
523 | ||
3d22d1ab TG |
524 | if (initrd && !mount_in_initrd(me)) |
525 | continue; | |
526 | ||
6b1dc2bd | 527 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
528 | if (!what) |
529 | return log_oom(); | |
530 | ||
00b4ffde | 531 | if (is_device_path(what) && path_is_read_only_fs("sys") > 0) { |
689aede8 LP |
532 | log_info("Running in a container, ignoring fstab device entry for %s.", what); |
533 | continue; | |
534 | } | |
535 | ||
98eda38a | 536 | where = strdup(me->mnt_dir); |
e48fdd84 | 537 | if (!where) |
5862d652 | 538 | return log_oom(); |
6b1dc2bd | 539 | |
634735b5 | 540 | if (is_path(where)) { |
858d36c1 | 541 | path_simplify(where, false); |
f1a2c758 | 542 | |
634735b5 CW |
543 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
544 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
545 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
546 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
f1a2c758 | 547 | * target is the final directory. */ |
634735b5 CW |
548 | r = chase_symlinks(where, initrd ? "/sysroot" : NULL, |
549 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, | |
550 | &canonical_where); | |
f1a2c758 LP |
551 | if (r < 0) /* If we can't canonicalize we continue on as if it wasn't a symlink */ |
552 | log_debug_errno(r, "Failed to read symlink target for %s, ignoring: %m", where); | |
553 | else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */ | |
554 | canonical_where = mfree(canonical_where); | |
555 | else | |
556 | log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where); | |
634735b5 | 557 | } |
6b1dc2bd | 558 | |
da495a03 | 559 | makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0"); |
7f2806d5 | 560 | growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0"); |
b9f111b9 ZJS |
561 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
562 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
f1a2c758 | 563 | |
da495a03 | 564 | log_debug("Found entry what=%s where=%s type=%s makefs=%s nofail=%s noauto=%s", |
5607d856 | 565 | what, where, me->mnt_type, |
da495a03 | 566 | yes_no(makefs), |
5607d856 | 567 | yes_no(noauto), yes_no(nofail)); |
6b1dc2bd LP |
568 | |
569 | if (streq(me->mnt_type, "swap")) | |
4191418b | 570 | k = add_swap(what, me, |
7f2806d5 | 571 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL); |
5e398e54 | 572 | else { |
5607d856 | 573 | bool automount; |
80c3b720 | 574 | const char *post; |
5e398e54 | 575 | |
b9f111b9 ZJS |
576 | automount = fstab_test_option(me->mnt_opts, |
577 | "comment=systemd.automount\0" | |
578 | "x-systemd.automount\0"); | |
e48fdd84 | 579 | if (initrd) |
700e07ff | 580 | post = SPECIAL_INITRD_FS_TARGET; |
e48fdd84 | 581 | else if (mount_is_network(me)) |
0c17fbce | 582 | post = SPECIAL_REMOTE_FS_TARGET; |
e48fdd84 | 583 | else |
0c17fbce | 584 | post = SPECIAL_LOCAL_FS_TARGET; |
5e398e54 | 585 | |
91214a37 LP |
586 | k = add_mount(arg_dest, |
587 | what, | |
634735b5 CW |
588 | canonical_where ?: where, |
589 | canonical_where ? where: NULL, | |
6db615c1 LP |
590 | me->mnt_type, |
591 | me->mnt_opts, | |
592 | me->mnt_passno, | |
7f2806d5 | 593 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL | automount*AUTOMOUNT, |
6db615c1 LP |
594 | post, |
595 | fstab_path); | |
5e398e54 | 596 | } |
6b1dc2bd | 597 | |
7f2806d5 | 598 | if (r >= 0 && k < 0) |
6b1dc2bd LP |
599 | r = k; |
600 | } | |
601 | ||
6b1dc2bd LP |
602 | return r; |
603 | } | |
604 | ||
2e852276 | 605 | static int add_sysroot_mount(void) { |
75a59316 ZJS |
606 | _cleanup_free_ char *what = NULL; |
607 | const char *opts; | |
7163e1ca | 608 | int r; |
5e398e54 | 609 | |
093c2cfe TH |
610 | if (isempty(arg_root_what)) { |
611 | log_debug("Could not find a root= entry on the kernel command line."); | |
612 | return 0; | |
135b5212 | 613 | } |
5e398e54 | 614 | |
138f4c69 LP |
615 | if (streq(arg_root_what, "gpt-auto")) { |
616 | /* This is handled by the gpt-auto generator */ | |
617 | log_debug("Skipping root directory handling, as gpt-auto was requested."); | |
618 | return 0; | |
619 | } | |
620 | ||
e34e72fb | 621 | if (path_equal(arg_root_what, "/dev/nfs")) { |
3ade16c9 HH |
622 | /* This is handled by the kernel or the initrd */ |
623 | log_debug("Skipping root directory handling, as /dev/nfs was requested."); | |
624 | return 0; | |
625 | } | |
626 | ||
093c2cfe TH |
627 | what = fstab_node_to_udev_node(arg_root_what); |
628 | if (!what) | |
171181bc | 629 | return log_oom(); |
093c2cfe | 630 | |
6db615c1 | 631 | if (!arg_root_options) |
75a59316 ZJS |
632 | opts = arg_root_rw > 0 ? "rw" : "ro"; |
633 | else if (arg_root_rw >= 0 || | |
d15d0333 | 634 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 635 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
636 | else |
637 | opts = arg_root_options; | |
5e398e54 | 638 | |
6db615c1 | 639 | log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype)); |
7163e1ca DD |
640 | |
641 | if (is_device_path(what)) { | |
642 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
643 | if (r < 0) | |
644 | return r; | |
645 | } | |
646 | ||
91214a37 LP |
647 | return add_mount(arg_dest, |
648 | what, | |
6db615c1 | 649 | "/sysroot", |
634735b5 | 650 | NULL, |
6db615c1 | 651 | arg_root_fstype, |
75a59316 | 652 | opts, |
f113f8e3 | 653 | is_device_path(what) ? 1 : 0, /* passno */ |
7f2806d5 | 654 | 0, /* makefs off, growfs off, noauto off, nofail off, automount off */ |
6db615c1 LP |
655 | SPECIAL_INITRD_ROOT_FS_TARGET, |
656 | "/proc/cmdline"); | |
5e398e54 TG |
657 | } |
658 | ||
2e852276 | 659 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
660 | _cleanup_free_ char *what = NULL; |
661 | const char *opts; | |
662 | ||
663 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
664 | return 0; | |
665 | ||
666 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 667 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 668 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
669 | if (!arg_usr_what) |
670 | return log_oom(); | |
671 | } | |
672 | ||
673 | if (arg_root_fstype && !arg_usr_fstype) { | |
674 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
675 | if (!arg_usr_fstype) |
676 | return log_oom(); | |
677 | } | |
678 | ||
679 | if (arg_root_options && !arg_usr_options) { | |
680 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
681 | if (!arg_usr_options) |
682 | return log_oom(); | |
683 | } | |
684 | ||
eb580002 | 685 | if (!arg_usr_what) |
9f103625 TH |
686 | return 0; |
687 | ||
688 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
689 | if (!what) |
690 | return log_oom(); | |
9f103625 | 691 | |
eb580002 MM |
692 | if (!arg_usr_options) |
693 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 694 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 695 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
696 | else |
697 | opts = arg_usr_options; | |
9f103625 TH |
698 | |
699 | log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype)); | |
91214a37 LP |
700 | return add_mount(arg_dest, |
701 | what, | |
9f103625 | 702 | "/sysroot/usr", |
634735b5 | 703 | NULL, |
9f103625 TH |
704 | arg_usr_fstype, |
705 | opts, | |
f113f8e3 | 706 | is_device_path(what) ? 1 : 0, /* passno */ |
4191418b | 707 | 0, |
104bc12f | 708 | SPECIAL_INITRD_FS_TARGET, |
9f103625 TH |
709 | "/proc/cmdline"); |
710 | } | |
711 | ||
91214a37 LP |
712 | static int add_volatile_root(void) { |
713 | const char *from, *to; | |
714 | ||
715 | if (arg_volatile_mode != VOLATILE_YES) | |
716 | return 0; | |
717 | ||
718 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is | |
719 | * requested, leaving only /usr from the root mount inside. */ | |
720 | ||
721 | from = strjoina(SYSTEM_DATA_UNIT_PATH "/systemd-volatile-root.service"); | |
722 | to = strjoina(arg_dest, "/" SPECIAL_INITRD_ROOT_FS_TARGET, ".requires/systemd-volatile-root.service"); | |
723 | ||
724 | (void) mkdir_parents(to, 0755); | |
725 | ||
726 | if (symlink(from, to) < 0) | |
727 | return log_error_errno(errno, "Failed to hook in volatile remount service: %m"); | |
728 | ||
729 | return 0; | |
730 | } | |
731 | ||
732 | static int add_volatile_var(void) { | |
733 | ||
734 | if (arg_volatile_mode != VOLATILE_STATE) | |
735 | return 0; | |
736 | ||
737 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
738 | ||
739 | return add_mount(arg_dest_late, | |
740 | "tmpfs", | |
741 | "/var", | |
634735b5 | 742 | NULL, |
91214a37 LP |
743 | "tmpfs", |
744 | "mode=0755", | |
745 | 0, | |
4191418b | 746 | 0, |
91214a37 LP |
747 | SPECIAL_LOCAL_FS_TARGET, |
748 | "/proc/cmdline"); | |
749 | } | |
750 | ||
96287a49 | 751 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 752 | int r; |
94734142 | 753 | |
9f103625 TH |
754 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
755 | * instance should take precedence. In the case of multiple rootflags= | |
756 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 757 | |
1d84ad94 | 758 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 759 | |
1d84ad94 | 760 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 761 | if (r < 0) |
059cb385 | 762 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 763 | else |
e48fdd84 | 764 | arg_fstab_enabled = r; |
94734142 | 765 | |
1d84ad94 LP |
766 | } else if (streq(key, "root")) { |
767 | ||
768 | if (proc_cmdline_value_missing(key, value)) | |
769 | return 0; | |
6db615c1 | 770 | |
f88dc3ed | 771 | if (free_and_strdup(&arg_root_what, value) < 0) |
6db615c1 LP |
772 | return log_oom(); |
773 | ||
1d84ad94 LP |
774 | } else if (streq(key, "rootfstype")) { |
775 | ||
776 | if (proc_cmdline_value_missing(key, value)) | |
777 | return 0; | |
6db615c1 | 778 | |
f88dc3ed | 779 | if (free_and_strdup(&arg_root_fstype, value) < 0) |
6db615c1 LP |
780 | return log_oom(); |
781 | ||
1d84ad94 | 782 | } else if (streq(key, "rootflags")) { |
6db615c1 | 783 | |
1d84ad94 LP |
784 | if (proc_cmdline_value_missing(key, value)) |
785 | return 0; | |
786 | ||
6c782b7a | 787 | if (!strextend_with_separator(&arg_root_options, ",", value, NULL)) |
6db615c1 LP |
788 | return log_oom(); |
789 | ||
2f3dfc6f LP |
790 | } else if (streq(key, "roothash")) { |
791 | ||
792 | if (proc_cmdline_value_missing(key, value)) | |
793 | return 0; | |
794 | ||
795 | if (free_and_strdup(&arg_root_hash, value) < 0) | |
796 | return log_oom(); | |
6db615c1 | 797 | |
1d84ad94 LP |
798 | } else if (streq(key, "mount.usr")) { |
799 | ||
800 | if (proc_cmdline_value_missing(key, value)) | |
801 | return 0; | |
9f103625 TH |
802 | |
803 | if (free_and_strdup(&arg_usr_what, value) < 0) | |
804 | return log_oom(); | |
805 | ||
1d84ad94 LP |
806 | } else if (streq(key, "mount.usrfstype")) { |
807 | ||
808 | if (proc_cmdline_value_missing(key, value)) | |
809 | return 0; | |
9f103625 TH |
810 | |
811 | if (free_and_strdup(&arg_usr_fstype, value) < 0) | |
812 | return log_oom(); | |
813 | ||
1d84ad94 | 814 | } else if (streq(key, "mount.usrflags")) { |
9f103625 | 815 | |
1d84ad94 LP |
816 | if (proc_cmdline_value_missing(key, value)) |
817 | return 0; | |
818 | ||
6c782b7a | 819 | if (!strextend_with_separator(&arg_usr_options, ",", value, NULL)) |
9f103625 TH |
820 | return log_oom(); |
821 | ||
6db615c1 LP |
822 | } else if (streq(key, "rw") && !value) |
823 | arg_root_rw = true; | |
824 | else if (streq(key, "ro") && !value) | |
825 | arg_root_rw = false; | |
91214a37 LP |
826 | else if (streq(key, "systemd.volatile")) { |
827 | VolatileMode m; | |
828 | ||
829 | if (value) { | |
830 | m = volatile_mode_from_string(value); | |
831 | if (m < 0) | |
832 | log_warning("Failed to parse systemd.volatile= argument: %s", value); | |
833 | else | |
834 | arg_volatile_mode = m; | |
835 | } else | |
836 | arg_volatile_mode = VOLATILE_YES; | |
837 | } | |
94734142 | 838 | |
d0aa9ce5 | 839 | return 0; |
94734142 LP |
840 | } |
841 | ||
2f3dfc6f LP |
842 | static int determine_root(void) { |
843 | /* If we have a root hash but no root device then Verity is used, and we use the "root" DM device as root. */ | |
844 | ||
845 | if (arg_root_what) | |
846 | return 0; | |
847 | ||
848 | if (!arg_root_hash) | |
849 | return 0; | |
850 | ||
851 | arg_root_what = strdup("/dev/mapper/root"); | |
852 | if (!arg_root_what) | |
853 | return log_oom(); | |
854 | ||
855 | log_info("Using verity root device %s.", arg_root_what); | |
856 | ||
857 | return 1; | |
858 | } | |
859 | ||
6b1dc2bd | 860 | int main(int argc, char *argv[]) { |
e48fdd84 | 861 | int r = 0; |
6b1dc2bd | 862 | |
07719a21 LP |
863 | if (argc > 1 && argc != 4) { |
864 | log_error("This program takes three or no arguments."); | |
6b1dc2bd LP |
865 | return EXIT_FAILURE; |
866 | } | |
867 | ||
868 | if (argc > 1) | |
869 | arg_dest = argv[1]; | |
91214a37 LP |
870 | if (argc > 3) |
871 | arg_dest_late = argv[3]; | |
6b1dc2bd | 872 | |
6c347d50 LP |
873 | log_set_prohibit_ipc(true); |
874 | log_set_target(LOG_TARGET_AUTO); | |
6b1dc2bd LP |
875 | log_parse_environment(); |
876 | log_open(); | |
877 | ||
6b1dc2bd LP |
878 | umask(0022); |
879 | ||
1d84ad94 | 880 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 881 | if (r < 0) |
da927ba9 | 882 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 883 | |
2f3dfc6f LP |
884 | (void) determine_root(); |
885 | ||
9f103625 TH |
886 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
887 | if (in_initrd()) { | |
003cba39 LP |
888 | int k; |
889 | ||
2e852276 | 890 | r = add_sysroot_mount(); |
003cba39 LP |
891 | |
892 | k = add_sysroot_usr_mount(); | |
893 | if (k < 0) | |
894 | r = k; | |
91214a37 LP |
895 | |
896 | k = add_volatile_root(); | |
897 | if (k < 0) | |
898 | r = k; | |
003cba39 | 899 | } else |
91214a37 | 900 | r = add_volatile_var(); |
5e398e54 | 901 | |
e48fdd84 LP |
902 | /* Honour /etc/fstab only when that's enabled */ |
903 | if (arg_fstab_enabled) { | |
904 | int k; | |
ac4785b0 | 905 | |
75a59316 ZJS |
906 | log_debug("Parsing /etc/fstab"); |
907 | ||
e48fdd84 LP |
908 | /* Parse the local /etc/fstab, possibly from the initrd */ |
909 | k = parse_fstab(false); | |
910 | if (k < 0) | |
911 | r = k; | |
ac4785b0 | 912 | |
e48fdd84 LP |
913 | /* If running in the initrd also parse the /etc/fstab from the host */ |
914 | if (in_initrd()) { | |
75a59316 ZJS |
915 | log_debug("Parsing /sysroot/etc/fstab"); |
916 | ||
e48fdd84 LP |
917 | k = parse_fstab(true); |
918 | if (k < 0) | |
919 | r = k; | |
920 | } | |
921 | } | |
6b1dc2bd | 922 | |
126cc760 | 923 | free(arg_root_what); |
59cfa62f LP |
924 | free(arg_root_fstype); |
925 | free(arg_root_options); | |
2f3dfc6f | 926 | free(arg_root_hash); |
59cfa62f LP |
927 | |
928 | free(arg_usr_what); | |
929 | free(arg_usr_fstype); | |
930 | free(arg_usr_options); | |
126cc760 | 931 | |
e48fdd84 | 932 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
6b1dc2bd | 933 | } |