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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6b1dc2bd LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2012 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
6b1dc2bd | 21 | #include <errno.h> |
07630cea LP |
22 | #include <mntent.h> |
23 | #include <stdio.h> | |
6b1dc2bd LP |
24 | #include <string.h> |
25 | #include <unistd.h> | |
26 | ||
b5efdb8a | 27 | #include "alloc-util.h" |
3ffd4af2 | 28 | #include "fd-util.h" |
634735b5 | 29 | #include "fs-util.h" |
0d39fa9c | 30 | #include "fileio.h" |
d15d0333 | 31 | #include "fstab-util.h" |
07630cea LP |
32 | #include "generator.h" |
33 | #include "log.h" | |
34 | #include "mkdir.h" | |
6b1dc2bd | 35 | #include "mount-setup.h" |
4349cd7c | 36 | #include "mount-util.h" |
6bedfcbb | 37 | #include "parse-util.h" |
07630cea | 38 | #include "path-util.h" |
4e731273 | 39 | #include "proc-cmdline.h" |
6b1dc2bd | 40 | #include "special.h" |
8fcde012 | 41 | #include "stat-util.h" |
07630cea | 42 | #include "string-util.h" |
059cb385 | 43 | #include "strv.h" |
07630cea LP |
44 | #include "unit-name.h" |
45 | #include "util.h" | |
689aede8 | 46 | #include "virt.h" |
91214a37 | 47 | #include "volatile-util.h" |
6b1dc2bd LP |
48 | |
49 | static const char *arg_dest = "/tmp"; | |
91214a37 | 50 | static const char *arg_dest_late = "/tmp"; |
e48fdd84 | 51 | static bool arg_fstab_enabled = true; |
6db615c1 LP |
52 | static char *arg_root_what = NULL; |
53 | static char *arg_root_fstype = NULL; | |
54 | static char *arg_root_options = NULL; | |
2f3dfc6f | 55 | static char *arg_root_hash = NULL; |
6db615c1 | 56 | static int arg_root_rw = -1; |
9f103625 TH |
57 | static char *arg_usr_what = NULL; |
58 | static char *arg_usr_fstype = NULL; | |
59 | static char *arg_usr_options = NULL; | |
91214a37 | 60 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 61 | |
d5cc4be2 LP |
62 | static int write_options(FILE *f, const char *options) { |
63 | _cleanup_free_ char *o = NULL; | |
64 | ||
65 | if (isempty(options)) | |
66 | return 0; | |
67 | ||
68 | if (streq(options, "defaults")) | |
69 | return 0; | |
70 | ||
71 | o = strreplace(options, "%", "%%"); | |
72 | if (!o) | |
73 | return log_oom(); | |
74 | ||
75 | fprintf(f, "Options=%s\n", o); | |
76 | return 1; | |
77 | } | |
78 | ||
19d0833b LP |
79 | static int write_what(FILE *f, const char *what) { |
80 | _cleanup_free_ char *w = NULL; | |
81 | ||
82 | w = strreplace(what, "%", "%%"); | |
83 | if (!w) | |
84 | return log_oom(); | |
85 | ||
86 | fprintf(f, "What=%s\n", w); | |
87 | return 1; | |
88 | } | |
89 | ||
5607d856 ZJS |
90 | static int add_swap( |
91 | const char *what, | |
92 | struct mntent *me, | |
93 | bool noauto, | |
94 | bool nofail) { | |
95 | ||
630d30d3 | 96 | _cleanup_free_ char *name = NULL, *unit = NULL; |
7fd1b19b | 97 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 98 | int r; |
6b1dc2bd LP |
99 | |
100 | assert(what); | |
101 | assert(me); | |
102 | ||
00b4ffde LP |
103 | if (access("/proc/swaps", F_OK) < 0) { |
104 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
105 | return 0; | |
106 | } | |
107 | ||
75f86906 | 108 | if (detect_container() > 0) { |
689aede8 LP |
109 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
110 | return 0; | |
111 | } | |
112 | ||
7410616c LP |
113 | r = unit_name_from_path(what, ".swap", &name); |
114 | if (r < 0) | |
115 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 116 | |
605405c6 | 117 | unit = strjoin(arg_dest, "/", name); |
d0aa9ce5 ZJS |
118 | if (!unit) |
119 | return log_oom(); | |
6b1dc2bd LP |
120 | |
121 | f = fopen(unit, "wxe"); | |
d710aaf7 ZJS |
122 | if (!f) |
123 | return log_error_errno(errno, | |
124 | errno == EEXIST ? | |
125 | "Failed to create swap unit file %s, as it already exists. Duplicate entry in /etc/fstab?" : | |
126 | "Failed to create unit file %s: %m", | |
127 | unit); | |
6b1dc2bd | 128 | |
4b61c875 LP |
129 | fputs_unlocked("# Automatically generated by systemd-fstab-generator\n\n" |
130 | "[Unit]\n" | |
131 | "SourcePath=/etc/fstab\n" | |
132 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n" | |
133 | "[Swap]\n", f); | |
19d0833b LP |
134 | |
135 | r = write_what(f, what); | |
136 | if (r < 0) | |
137 | return r; | |
6b1dc2bd | 138 | |
d5cc4be2 LP |
139 | r = write_options(f, me->mnt_opts); |
140 | if (r < 0) | |
141 | return r; | |
6b1dc2bd | 142 | |
47cb901e | 143 | r = fflush_and_check(f); |
23bbb0de MS |
144 | if (r < 0) |
145 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
6b1dc2bd | 146 | |
b3208b66 | 147 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 148 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
149 | if (r < 0) |
150 | return r; | |
151 | ||
4e82fe52 | 152 | if (!noauto) { |
630d30d3 ZJS |
153 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
154 | nofail ? "wants" : "requires", name); | |
155 | if (r < 0) | |
156 | return r; | |
4e82fe52 TG |
157 | } |
158 | ||
d0aa9ce5 | 159 | return 0; |
6b1dc2bd LP |
160 | } |
161 | ||
6b1dc2bd LP |
162 | static bool mount_is_network(struct mntent *me) { |
163 | assert(me); | |
164 | ||
b9f111b9 ZJS |
165 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
166 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
167 | } |
168 | ||
3d22d1ab TG |
169 | static bool mount_in_initrd(struct mntent *me) { |
170 | assert(me); | |
171 | ||
b9f111b9 ZJS |
172 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
173 | streq(me->mnt_dir, "/usr"); | |
3d22d1ab TG |
174 | } |
175 | ||
110773f6 | 176 | static int write_timeout(FILE *f, const char *where, const char *opts, |
0004f698 | 177 | const char *filter, const char *variable) { |
deb0a77c MO |
178 | _cleanup_free_ char *timeout = NULL; |
179 | char timespan[FORMAT_TIMESPAN_MAX]; | |
180 | usec_t u; | |
181 | int r; | |
182 | ||
110773f6 | 183 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL); |
deb0a77c MO |
184 | if (r < 0) |
185 | return log_warning_errno(r, "Failed to parse options: %m"); | |
186 | if (r == 0) | |
187 | return 0; | |
188 | ||
0004f698 | 189 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
190 | if (r < 0) { |
191 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
192 | return 0; | |
193 | } | |
194 | ||
110773f6 | 195 | fprintf(f, "%s=%s\n", variable, format_timespan(timespan, sizeof(timespan), u, 0)); |
deb0a77c MO |
196 | |
197 | return 0; | |
198 | } | |
2e852276 | 199 | |
110773f6 CH |
200 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
201 | return write_timeout(f, where, opts, | |
202 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
203 | } | |
204 | ||
205 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
206 | return write_timeout(f, where, opts, | |
207 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
208 | } | |
209 | ||
ae325185 RB |
210 | static int write_dependency(FILE *f, const char *opts, |
211 | const char *filter, const char *format) { | |
3519d230 KZ |
212 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
213 | _cleanup_free_ char *res = NULL; | |
214 | char **s; | |
215 | int r; | |
216 | ||
217 | assert(f); | |
218 | assert(opts); | |
219 | ||
ae325185 | 220 | r = fstab_extract_values(opts, filter, &names); |
3519d230 KZ |
221 | if (r < 0) |
222 | return log_warning_errno(r, "Failed to parse options: %m"); | |
223 | if (r == 0) | |
224 | return 0; | |
225 | ||
226 | STRV_FOREACH(s, names) { | |
227 | char *x; | |
228 | ||
229 | r = unit_name_mangle_with_suffix(*s, UNIT_NAME_NOGLOB, ".mount", &x); | |
230 | if (r < 0) | |
231 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
232 | r = strv_consume(&units, x); | |
233 | if (r < 0) | |
234 | return log_oom(); | |
235 | } | |
236 | ||
237 | if (units) { | |
238 | res = strv_join(units, " "); | |
239 | if (!res) | |
240 | return log_oom(); | |
4a027e19 MP |
241 | #pragma GCC diagnostic push |
242 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
ae325185 | 243 | fprintf(f, format, res); |
4a027e19 | 244 | #pragma GCC diagnostic pop |
3519d230 KZ |
245 | } |
246 | ||
247 | return 0; | |
248 | } | |
249 | ||
ae325185 RB |
250 | static int write_after(FILE *f, const char *opts) { |
251 | return write_dependency(f, opts, "x-systemd.after", "After=%1$s\n"); | |
252 | } | |
253 | ||
254 | static int write_requires_after(FILE *f, const char *opts) { | |
255 | return write_dependency(f, opts, | |
256 | "x-systemd.requires", "After=%1$s\nRequires=%1$s\n"); | |
257 | } | |
258 | ||
259 | static int write_before(FILE *f, const char *opts) { | |
260 | return write_dependency(f, opts, | |
261 | "x-systemd.before", "Before=%1$s\n"); | |
262 | } | |
263 | ||
3519d230 KZ |
264 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
265 | _cleanup_strv_free_ char **paths = NULL; | |
266 | _cleanup_free_ char *res = NULL; | |
267 | int r; | |
268 | ||
269 | assert(f); | |
270 | assert(opts); | |
271 | ||
272 | r = fstab_extract_values(opts, "x-systemd.requires-mounts-for", &paths); | |
273 | if (r < 0) | |
274 | return log_warning_errno(r, "Failed to parse options: %m"); | |
275 | if (r == 0) | |
276 | return 0; | |
277 | ||
278 | res = strv_join(paths, " "); | |
279 | if (!res) | |
280 | return log_oom(); | |
281 | ||
282 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
e8d2f6cd | 287 | static int add_mount( |
91214a37 | 288 | const char *dest, |
e8d2f6cd LP |
289 | const char *what, |
290 | const char *where, | |
634735b5 | 291 | const char *original_where, |
6db615c1 | 292 | const char *fstype, |
e8d2f6cd LP |
293 | const char *opts, |
294 | int passno, | |
295 | bool noauto, | |
296 | bool nofail, | |
297 | bool automount, | |
e8d2f6cd | 298 | const char *post, |
e8d2f6cd | 299 | const char *source) { |
e48fdd84 | 300 | |
7fd1b19b | 301 | _cleanup_free_ char |
630d30d3 | 302 | *name = NULL, *unit = NULL, |
29686440 ZJS |
303 | *automount_name = NULL, *automount_unit = NULL, |
304 | *filtered = NULL; | |
7fd1b19b | 305 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 306 | int r; |
6b1dc2bd LP |
307 | |
308 | assert(what); | |
309 | assert(where); | |
5e398e54 | 310 | assert(opts); |
0d3d3be1 | 311 | assert(post); |
5e398e54 | 312 | assert(source); |
6b1dc2bd | 313 | |
6db615c1 | 314 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
315 | return 0; |
316 | ||
317 | if (!is_path(where)) { | |
318 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | if (mount_point_is_api(where) || | |
323 | mount_point_ignore(where)) | |
324 | return 0; | |
325 | ||
e48fdd84 | 326 | if (path_equal(where, "/")) { |
2e852276 ZJS |
327 | if (noauto) |
328 | log_warning("Ignoring \"noauto\" for root device"); | |
329 | if (nofail) | |
330 | log_warning("Ignoring \"nofail\" for root device"); | |
331 | if (automount) | |
332 | log_warning("Ignoring automount option for root device"); | |
333 | ||
334 | noauto = nofail = automount = false; | |
e48fdd84 LP |
335 | } |
336 | ||
7410616c LP |
337 | r = unit_name_from_path(where, ".mount", &name); |
338 | if (r < 0) | |
339 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 340 | |
91214a37 | 341 | unit = strjoin(dest, "/", name); |
d0aa9ce5 ZJS |
342 | if (!unit) |
343 | return log_oom(); | |
6b1dc2bd LP |
344 | |
345 | f = fopen(unit, "wxe"); | |
d710aaf7 ZJS |
346 | if (!f) |
347 | return log_error_errno(errno, | |
348 | errno == EEXIST ? | |
349 | "Failed to create mount unit file %s, as it already exists. Duplicate entry in /etc/fstab?" : | |
350 | "Failed to create unit file %s: %m", | |
351 | unit); | |
6b1dc2bd | 352 | |
5e398e54 | 353 | fprintf(f, |
c3834f9b LP |
354 | "# Automatically generated by systemd-fstab-generator\n\n" |
355 | "[Unit]\n" | |
356 | "SourcePath=%s\n" | |
357 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
358 | source); | |
6b1dc2bd | 359 | |
86086fce | 360 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !automount && |
65e1dee7 N |
361 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
362 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
363 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
364 | * As we are making 'bg' mounts look like an 'fg' mount to | |
365 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
366 | * we need to explicitly preserve that default, and also ensure | |
367 | * the systemd mount-timeout doesn't interfere. | |
368 | * By placing these options first, they can be over-ridden by | |
369 | * settings in /etc/fstab. */ | |
370 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,", opts, ",fg"); | |
371 | nofail = true; | |
372 | } | |
373 | ||
bd6bcce4 | 374 | if (!nofail && !automount) |
5ecdcf41 | 375 | fprintf(f, "Before=%s\n", post); |
6b1dc2bd | 376 | |
3519d230 | 377 | if (!automount && opts) { |
ae325185 RB |
378 | r = write_after(f, opts); |
379 | if (r < 0) | |
380 | return r; | |
3519d230 | 381 | r = write_requires_after(f, opts); |
ae325185 RB |
382 | if (r < 0) |
383 | return r; | |
384 | r = write_before(f, opts); | |
3519d230 KZ |
385 | if (r < 0) |
386 | return r; | |
387 | r = write_requires_mounts_for(f, opts); | |
388 | if (r < 0) | |
389 | return r; | |
390 | } | |
391 | ||
e48fdd84 | 392 | if (passno != 0) { |
91214a37 | 393 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
394 | if (r < 0) |
395 | return r; | |
396 | } | |
64e70e4b | 397 | |
634735b5 CW |
398 | fprintf(f, "\n[Mount]\n"); |
399 | if (original_where) | |
400 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
401 | fprintf(f, "Where=%s\n", where); | |
6db615c1 | 402 | |
19d0833b LP |
403 | r = write_what(f, what); |
404 | if (r < 0) | |
405 | return r; | |
406 | ||
6db615c1 LP |
407 | if (!isempty(fstype) && !streq(fstype, "auto")) |
408 | fprintf(f, "Type=%s\n", fstype); | |
6b1dc2bd | 409 | |
91214a37 | 410 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
411 | if (r < 0) |
412 | return r; | |
413 | ||
4195077a MK |
414 | r = generator_write_device_deps(dest, what, where, opts); |
415 | if (r < 0) | |
416 | return r; | |
417 | ||
110773f6 CH |
418 | r = write_mount_timeout(f, where, opts); |
419 | if (r < 0) | |
420 | return r; | |
421 | ||
d5cc4be2 LP |
422 | r = write_options(f, filtered); |
423 | if (r < 0) | |
424 | return r; | |
5e398e54 | 425 | |
4652c56c ZJS |
426 | r = fflush_and_check(f); |
427 | if (r < 0) | |
428 | return log_error_errno(r, "Failed to write unit file %s: %m", unit); | |
6b1dc2bd | 429 | |
2b14df4a | 430 | if (!noauto && !automount) { |
630d30d3 ZJS |
431 | r = generator_add_symlink(dest, post, |
432 | nofail ? "wants" : "requires", name); | |
433 | if (r < 0) | |
434 | return r; | |
6b1dc2bd LP |
435 | } |
436 | ||
e48fdd84 | 437 | if (automount) { |
7410616c LP |
438 | r = unit_name_from_path(where, ".automount", &automount_name); |
439 | if (r < 0) | |
440 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 441 | |
91214a37 | 442 | automount_unit = strjoin(dest, "/", automount_name); |
d0aa9ce5 ZJS |
443 | if (!automount_unit) |
444 | return log_oom(); | |
6b1dc2bd LP |
445 | |
446 | fclose(f); | |
447 | f = fopen(automount_unit, "wxe"); | |
4a62c710 MS |
448 | if (!f) |
449 | return log_error_errno(errno, "Failed to create unit file %s: %m", automount_unit); | |
6b1dc2bd LP |
450 | |
451 | fprintf(f, | |
452 | "# Automatically generated by systemd-fstab-generator\n\n" | |
453 | "[Unit]\n" | |
c3834f9b LP |
454 | "SourcePath=%s\n" |
455 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
456 | source); |
457 | ||
0d3d3be1 | 458 | fprintf(f, "Before=%s\n", post); |
700e07ff | 459 | |
3519d230 | 460 | if (opts) { |
ae325185 RB |
461 | r = write_after(f, opts); |
462 | if (r < 0) | |
463 | return r; | |
3519d230 | 464 | r = write_requires_after(f, opts); |
ae325185 RB |
465 | if (r < 0) |
466 | return r; | |
467 | r = write_before(f, opts); | |
3519d230 KZ |
468 | if (r < 0) |
469 | return r; | |
470 | r = write_requires_mounts_for(f, opts); | |
471 | if (r < 0) | |
472 | return r; | |
473 | } | |
474 | ||
700e07ff | 475 | fprintf(f, |
bd10a84b | 476 | "\n" |
6b1dc2bd LP |
477 | "[Automount]\n" |
478 | "Where=%s\n", | |
6b1dc2bd LP |
479 | where); |
480 | ||
336b5c61 | 481 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
482 | if (r < 0) |
483 | return r; | |
484 | ||
4652c56c ZJS |
485 | r = fflush_and_check(f); |
486 | if (r < 0) | |
487 | return log_error_errno(r, "Failed to write unit file %s: %m", automount_unit); | |
6b1dc2bd | 488 | |
630d30d3 ZJS |
489 | r = generator_add_symlink(dest, post, |
490 | nofail ? "wants" : "requires", automount_name); | |
491 | if (r < 0) | |
492 | return r; | |
6b1dc2bd LP |
493 | } |
494 | ||
d0aa9ce5 | 495 | return 0; |
6b1dc2bd LP |
496 | } |
497 | ||
e48fdd84 | 498 | static int parse_fstab(bool initrd) { |
6db615c1 | 499 | _cleanup_endmntent_ FILE *f = NULL; |
e48fdd84 | 500 | const char *fstab_path; |
6b1dc2bd | 501 | struct mntent *me; |
e48fdd84 | 502 | int r = 0; |
6b1dc2bd | 503 | |
e48fdd84 LP |
504 | fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab"; |
505 | f = setmntent(fstab_path, "re"); | |
6b1dc2bd LP |
506 | if (!f) { |
507 | if (errno == ENOENT) | |
508 | return 0; | |
509 | ||
592288a2 | 510 | return log_error_errno(errno, "Failed to open %s: %m", fstab_path); |
6b1dc2bd LP |
511 | } |
512 | ||
513 | while ((me = getmntent(f))) { | |
634735b5 | 514 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
5607d856 | 515 | bool noauto, nofail; |
6b1dc2bd LP |
516 | int k; |
517 | ||
3d22d1ab TG |
518 | if (initrd && !mount_in_initrd(me)) |
519 | continue; | |
520 | ||
6b1dc2bd | 521 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
522 | if (!what) |
523 | return log_oom(); | |
524 | ||
00b4ffde | 525 | if (is_device_path(what) && path_is_read_only_fs("sys") > 0) { |
689aede8 LP |
526 | log_info("Running in a container, ignoring fstab device entry for %s.", what); |
527 | continue; | |
528 | } | |
529 | ||
98eda38a | 530 | where = strdup(me->mnt_dir); |
e48fdd84 | 531 | if (!where) |
5862d652 | 532 | return log_oom(); |
6b1dc2bd | 533 | |
634735b5 | 534 | if (is_path(where)) { |
6b1dc2bd | 535 | path_kill_slashes(where); |
634735b5 CW |
536 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
537 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
538 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
539 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
540 | * target is the final directory. | |
541 | */ | |
542 | r = chase_symlinks(where, initrd ? "/sysroot" : NULL, | |
543 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, | |
544 | &canonical_where); | |
545 | if (r < 0) | |
546 | /* In this case for now we continue on as if it wasn't a symlink */ | |
547 | log_warning_errno(r, "Failed to read symlink target for %s: %m", where); | |
548 | else { | |
549 | if (streq(canonical_where, where)) | |
550 | canonical_where = mfree(canonical_where); | |
551 | else | |
552 | log_debug("Canonicalized what=%s where=%s to %s", | |
553 | what, where, canonical_where); | |
554 | } | |
555 | } | |
6b1dc2bd | 556 | |
b9f111b9 ZJS |
557 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
558 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
5607d856 ZJS |
559 | log_debug("Found entry what=%s where=%s type=%s nofail=%s noauto=%s", |
560 | what, where, me->mnt_type, | |
561 | yes_no(noauto), yes_no(nofail)); | |
6b1dc2bd LP |
562 | |
563 | if (streq(me->mnt_type, "swap")) | |
5607d856 | 564 | k = add_swap(what, me, noauto, nofail); |
5e398e54 | 565 | else { |
5607d856 | 566 | bool automount; |
80c3b720 | 567 | const char *post; |
5e398e54 | 568 | |
b9f111b9 ZJS |
569 | automount = fstab_test_option(me->mnt_opts, |
570 | "comment=systemd.automount\0" | |
571 | "x-systemd.automount\0"); | |
e48fdd84 | 572 | if (initrd) |
700e07ff | 573 | post = SPECIAL_INITRD_FS_TARGET; |
e48fdd84 | 574 | else if (mount_is_network(me)) |
0c17fbce | 575 | post = SPECIAL_REMOTE_FS_TARGET; |
e48fdd84 | 576 | else |
0c17fbce | 577 | post = SPECIAL_LOCAL_FS_TARGET; |
5e398e54 | 578 | |
91214a37 LP |
579 | k = add_mount(arg_dest, |
580 | what, | |
634735b5 CW |
581 | canonical_where ?: where, |
582 | canonical_where ? where: NULL, | |
6db615c1 LP |
583 | me->mnt_type, |
584 | me->mnt_opts, | |
585 | me->mnt_passno, | |
586 | noauto, | |
587 | nofail, | |
588 | automount, | |
589 | post, | |
590 | fstab_path); | |
5e398e54 | 591 | } |
6b1dc2bd | 592 | |
6b1dc2bd LP |
593 | if (k < 0) |
594 | r = k; | |
595 | } | |
596 | ||
6b1dc2bd LP |
597 | return r; |
598 | } | |
599 | ||
2e852276 | 600 | static int add_sysroot_mount(void) { |
75a59316 ZJS |
601 | _cleanup_free_ char *what = NULL; |
602 | const char *opts; | |
7163e1ca | 603 | int r; |
5e398e54 | 604 | |
093c2cfe TH |
605 | if (isempty(arg_root_what)) { |
606 | log_debug("Could not find a root= entry on the kernel command line."); | |
607 | return 0; | |
135b5212 | 608 | } |
5e398e54 | 609 | |
138f4c69 LP |
610 | if (streq(arg_root_what, "gpt-auto")) { |
611 | /* This is handled by the gpt-auto generator */ | |
612 | log_debug("Skipping root directory handling, as gpt-auto was requested."); | |
613 | return 0; | |
614 | } | |
615 | ||
e34e72fb | 616 | if (path_equal(arg_root_what, "/dev/nfs")) { |
3ade16c9 HH |
617 | /* This is handled by the kernel or the initrd */ |
618 | log_debug("Skipping root directory handling, as /dev/nfs was requested."); | |
619 | return 0; | |
620 | } | |
621 | ||
093c2cfe TH |
622 | what = fstab_node_to_udev_node(arg_root_what); |
623 | if (!what) | |
171181bc | 624 | return log_oom(); |
093c2cfe | 625 | |
6db615c1 | 626 | if (!arg_root_options) |
75a59316 ZJS |
627 | opts = arg_root_rw > 0 ? "rw" : "ro"; |
628 | else if (arg_root_rw >= 0 || | |
d15d0333 | 629 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 630 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
631 | else |
632 | opts = arg_root_options; | |
5e398e54 | 633 | |
6db615c1 | 634 | log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype)); |
7163e1ca DD |
635 | |
636 | if (is_device_path(what)) { | |
637 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
638 | if (r < 0) | |
639 | return r; | |
640 | } | |
641 | ||
91214a37 LP |
642 | return add_mount(arg_dest, |
643 | what, | |
6db615c1 | 644 | "/sysroot", |
634735b5 | 645 | NULL, |
6db615c1 | 646 | arg_root_fstype, |
75a59316 | 647 | opts, |
f113f8e3 LP |
648 | is_device_path(what) ? 1 : 0, /* passno */ |
649 | false, /* noauto off */ | |
650 | false, /* nofail off */ | |
651 | false, /* automount off */ | |
6db615c1 LP |
652 | SPECIAL_INITRD_ROOT_FS_TARGET, |
653 | "/proc/cmdline"); | |
5e398e54 TG |
654 | } |
655 | ||
2e852276 | 656 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
657 | _cleanup_free_ char *what = NULL; |
658 | const char *opts; | |
659 | ||
660 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
661 | return 0; | |
662 | ||
663 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 664 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 665 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
666 | if (!arg_usr_what) |
667 | return log_oom(); | |
668 | } | |
669 | ||
670 | if (arg_root_fstype && !arg_usr_fstype) { | |
671 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
672 | if (!arg_usr_fstype) |
673 | return log_oom(); | |
674 | } | |
675 | ||
676 | if (arg_root_options && !arg_usr_options) { | |
677 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
678 | if (!arg_usr_options) |
679 | return log_oom(); | |
680 | } | |
681 | ||
eb580002 | 682 | if (!arg_usr_what) |
9f103625 TH |
683 | return 0; |
684 | ||
685 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
686 | if (!what) |
687 | return log_oom(); | |
9f103625 | 688 | |
eb580002 MM |
689 | if (!arg_usr_options) |
690 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 691 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 692 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
693 | else |
694 | opts = arg_usr_options; | |
9f103625 TH |
695 | |
696 | log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype)); | |
91214a37 LP |
697 | return add_mount(arg_dest, |
698 | what, | |
9f103625 | 699 | "/sysroot/usr", |
634735b5 | 700 | NULL, |
9f103625 TH |
701 | arg_usr_fstype, |
702 | opts, | |
f113f8e3 LP |
703 | is_device_path(what) ? 1 : 0, /* passno */ |
704 | false, /* noauto off */ | |
705 | false, /* nofail off */ | |
706 | false, /* automount off */ | |
104bc12f | 707 | SPECIAL_INITRD_FS_TARGET, |
9f103625 TH |
708 | "/proc/cmdline"); |
709 | } | |
710 | ||
91214a37 LP |
711 | static int add_volatile_root(void) { |
712 | const char *from, *to; | |
713 | ||
714 | if (arg_volatile_mode != VOLATILE_YES) | |
715 | return 0; | |
716 | ||
717 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is | |
718 | * requested, leaving only /usr from the root mount inside. */ | |
719 | ||
720 | from = strjoina(SYSTEM_DATA_UNIT_PATH "/systemd-volatile-root.service"); | |
721 | to = strjoina(arg_dest, "/" SPECIAL_INITRD_ROOT_FS_TARGET, ".requires/systemd-volatile-root.service"); | |
722 | ||
723 | (void) mkdir_parents(to, 0755); | |
724 | ||
725 | if (symlink(from, to) < 0) | |
726 | return log_error_errno(errno, "Failed to hook in volatile remount service: %m"); | |
727 | ||
728 | return 0; | |
729 | } | |
730 | ||
731 | static int add_volatile_var(void) { | |
732 | ||
733 | if (arg_volatile_mode != VOLATILE_STATE) | |
734 | return 0; | |
735 | ||
736 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
737 | ||
738 | return add_mount(arg_dest_late, | |
739 | "tmpfs", | |
740 | "/var", | |
634735b5 | 741 | NULL, |
91214a37 LP |
742 | "tmpfs", |
743 | "mode=0755", | |
744 | 0, | |
745 | false, | |
746 | false, | |
747 | false, | |
748 | SPECIAL_LOCAL_FS_TARGET, | |
749 | "/proc/cmdline"); | |
750 | } | |
751 | ||
96287a49 | 752 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 753 | int r; |
94734142 | 754 | |
9f103625 TH |
755 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
756 | * instance should take precedence. In the case of multiple rootflags= | |
757 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 758 | |
1d84ad94 | 759 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 760 | |
1d84ad94 | 761 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 762 | if (r < 0) |
059cb385 | 763 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 764 | else |
e48fdd84 | 765 | arg_fstab_enabled = r; |
94734142 | 766 | |
1d84ad94 LP |
767 | } else if (streq(key, "root")) { |
768 | ||
769 | if (proc_cmdline_value_missing(key, value)) | |
770 | return 0; | |
6db615c1 | 771 | |
f88dc3ed | 772 | if (free_and_strdup(&arg_root_what, value) < 0) |
6db615c1 LP |
773 | return log_oom(); |
774 | ||
1d84ad94 LP |
775 | } else if (streq(key, "rootfstype")) { |
776 | ||
777 | if (proc_cmdline_value_missing(key, value)) | |
778 | return 0; | |
6db615c1 | 779 | |
f88dc3ed | 780 | if (free_and_strdup(&arg_root_fstype, value) < 0) |
6db615c1 LP |
781 | return log_oom(); |
782 | ||
1d84ad94 | 783 | } else if (streq(key, "rootflags")) { |
6db615c1 LP |
784 | char *o; |
785 | ||
1d84ad94 LP |
786 | if (proc_cmdline_value_missing(key, value)) |
787 | return 0; | |
788 | ||
6db615c1 | 789 | o = arg_root_options ? |
605405c6 | 790 | strjoin(arg_root_options, ",", value) : |
6db615c1 LP |
791 | strdup(value); |
792 | if (!o) | |
793 | return log_oom(); | |
794 | ||
795 | free(arg_root_options); | |
796 | arg_root_options = o; | |
2f3dfc6f LP |
797 | } else if (streq(key, "roothash")) { |
798 | ||
799 | if (proc_cmdline_value_missing(key, value)) | |
800 | return 0; | |
801 | ||
802 | if (free_and_strdup(&arg_root_hash, value) < 0) | |
803 | return log_oom(); | |
6db615c1 | 804 | |
1d84ad94 LP |
805 | } else if (streq(key, "mount.usr")) { |
806 | ||
807 | if (proc_cmdline_value_missing(key, value)) | |
808 | return 0; | |
9f103625 TH |
809 | |
810 | if (free_and_strdup(&arg_usr_what, value) < 0) | |
811 | return log_oom(); | |
812 | ||
1d84ad94 LP |
813 | } else if (streq(key, "mount.usrfstype")) { |
814 | ||
815 | if (proc_cmdline_value_missing(key, value)) | |
816 | return 0; | |
9f103625 TH |
817 | |
818 | if (free_and_strdup(&arg_usr_fstype, value) < 0) | |
819 | return log_oom(); | |
820 | ||
1d84ad94 | 821 | } else if (streq(key, "mount.usrflags")) { |
9f103625 TH |
822 | char *o; |
823 | ||
1d84ad94 LP |
824 | if (proc_cmdline_value_missing(key, value)) |
825 | return 0; | |
826 | ||
9f103625 | 827 | o = arg_usr_options ? |
605405c6 | 828 | strjoin(arg_usr_options, ",", value) : |
9f103625 TH |
829 | strdup(value); |
830 | if (!o) | |
831 | return log_oom(); | |
832 | ||
833 | free(arg_usr_options); | |
834 | arg_usr_options = o; | |
835 | ||
6db615c1 LP |
836 | } else if (streq(key, "rw") && !value) |
837 | arg_root_rw = true; | |
838 | else if (streq(key, "ro") && !value) | |
839 | arg_root_rw = false; | |
91214a37 LP |
840 | else if (streq(key, "systemd.volatile")) { |
841 | VolatileMode m; | |
842 | ||
843 | if (value) { | |
844 | m = volatile_mode_from_string(value); | |
845 | if (m < 0) | |
846 | log_warning("Failed to parse systemd.volatile= argument: %s", value); | |
847 | else | |
848 | arg_volatile_mode = m; | |
849 | } else | |
850 | arg_volatile_mode = VOLATILE_YES; | |
851 | } | |
94734142 | 852 | |
d0aa9ce5 | 853 | return 0; |
94734142 LP |
854 | } |
855 | ||
2f3dfc6f LP |
856 | static int determine_root(void) { |
857 | /* If we have a root hash but no root device then Verity is used, and we use the "root" DM device as root. */ | |
858 | ||
859 | if (arg_root_what) | |
860 | return 0; | |
861 | ||
862 | if (!arg_root_hash) | |
863 | return 0; | |
864 | ||
865 | arg_root_what = strdup("/dev/mapper/root"); | |
866 | if (!arg_root_what) | |
867 | return log_oom(); | |
868 | ||
869 | log_info("Using verity root device %s.", arg_root_what); | |
870 | ||
871 | return 1; | |
872 | } | |
873 | ||
6b1dc2bd | 874 | int main(int argc, char *argv[]) { |
e48fdd84 | 875 | int r = 0; |
6b1dc2bd | 876 | |
07719a21 LP |
877 | if (argc > 1 && argc != 4) { |
878 | log_error("This program takes three or no arguments."); | |
6b1dc2bd LP |
879 | return EXIT_FAILURE; |
880 | } | |
881 | ||
882 | if (argc > 1) | |
883 | arg_dest = argv[1]; | |
91214a37 LP |
884 | if (argc > 3) |
885 | arg_dest_late = argv[3]; | |
6b1dc2bd | 886 | |
a6903061 | 887 | log_set_target(LOG_TARGET_SAFE); |
6b1dc2bd LP |
888 | log_parse_environment(); |
889 | log_open(); | |
890 | ||
6b1dc2bd LP |
891 | umask(0022); |
892 | ||
1d84ad94 | 893 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 894 | if (r < 0) |
da927ba9 | 895 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 896 | |
2f3dfc6f LP |
897 | (void) determine_root(); |
898 | ||
9f103625 TH |
899 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
900 | if (in_initrd()) { | |
003cba39 LP |
901 | int k; |
902 | ||
2e852276 | 903 | r = add_sysroot_mount(); |
003cba39 LP |
904 | |
905 | k = add_sysroot_usr_mount(); | |
906 | if (k < 0) | |
907 | r = k; | |
91214a37 LP |
908 | |
909 | k = add_volatile_root(); | |
910 | if (k < 0) | |
911 | r = k; | |
003cba39 | 912 | } else |
91214a37 | 913 | r = add_volatile_var(); |
5e398e54 | 914 | |
e48fdd84 LP |
915 | /* Honour /etc/fstab only when that's enabled */ |
916 | if (arg_fstab_enabled) { | |
917 | int k; | |
ac4785b0 | 918 | |
75a59316 ZJS |
919 | log_debug("Parsing /etc/fstab"); |
920 | ||
e48fdd84 LP |
921 | /* Parse the local /etc/fstab, possibly from the initrd */ |
922 | k = parse_fstab(false); | |
923 | if (k < 0) | |
924 | r = k; | |
ac4785b0 | 925 | |
e48fdd84 LP |
926 | /* If running in the initrd also parse the /etc/fstab from the host */ |
927 | if (in_initrd()) { | |
75a59316 ZJS |
928 | log_debug("Parsing /sysroot/etc/fstab"); |
929 | ||
e48fdd84 LP |
930 | k = parse_fstab(true); |
931 | if (k < 0) | |
932 | r = k; | |
933 | } | |
934 | } | |
6b1dc2bd | 935 | |
126cc760 | 936 | free(arg_root_what); |
59cfa62f LP |
937 | free(arg_root_fstype); |
938 | free(arg_root_options); | |
2f3dfc6f | 939 | free(arg_root_hash); |
59cfa62f LP |
940 | |
941 | free(arg_usr_what); | |
942 | free(arg_usr_fstype); | |
943 | free(arg_usr_options); | |
126cc760 | 944 | |
e48fdd84 | 945 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
6b1dc2bd | 946 | } |