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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" | |
a4ef3e4d | 17 | #include "main-func.h" |
07630cea | 18 | #include "mkdir.h" |
6b1dc2bd | 19 | #include "mount-setup.h" |
4349cd7c | 20 | #include "mount-util.h" |
049af8ad | 21 | #include "mountpoint-util.h" |
6bedfcbb | 22 | #include "parse-util.h" |
07630cea | 23 | #include "path-util.h" |
4e731273 | 24 | #include "proc-cmdline.h" |
6b1dc2bd | 25 | #include "special.h" |
98bad05e | 26 | #include "specifier.h" |
8fcde012 | 27 | #include "stat-util.h" |
07630cea | 28 | #include "string-util.h" |
059cb385 | 29 | #include "strv.h" |
07630cea LP |
30 | #include "unit-name.h" |
31 | #include "util.h" | |
689aede8 | 32 | #include "virt.h" |
91214a37 | 33 | #include "volatile-util.h" |
6b1dc2bd | 34 | |
4191418b ZJS |
35 | typedef enum MountpointFlags { |
36 | NOAUTO = 1 << 0, | |
37 | NOFAIL = 1 << 1, | |
38 | AUTOMOUNT = 1 << 2, | |
da495a03 | 39 | MAKEFS = 1 << 3, |
7f2806d5 | 40 | GROWFS = 1 << 4, |
4191418b ZJS |
41 | } MountpointFlags; |
42 | ||
7a44c7e3 ZJS |
43 | static const char *arg_dest = NULL; |
44 | static const char *arg_dest_late = NULL; | |
e48fdd84 | 45 | static bool arg_fstab_enabled = true; |
6db615c1 LP |
46 | static char *arg_root_what = NULL; |
47 | static char *arg_root_fstype = NULL; | |
48 | static char *arg_root_options = NULL; | |
2f3dfc6f | 49 | static char *arg_root_hash = NULL; |
6db615c1 | 50 | static int arg_root_rw = -1; |
9f103625 TH |
51 | static char *arg_usr_what = NULL; |
52 | static char *arg_usr_fstype = NULL; | |
53 | static char *arg_usr_options = NULL; | |
91214a37 | 54 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 55 | |
a4ef3e4d YW |
56 | STATIC_DESTRUCTOR_REGISTER(arg_root_what, freep); |
57 | STATIC_DESTRUCTOR_REGISTER(arg_root_fstype, freep); | |
58 | STATIC_DESTRUCTOR_REGISTER(arg_root_options, freep); | |
59 | STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep); | |
60 | STATIC_DESTRUCTOR_REGISTER(arg_usr_what, freep); | |
61 | STATIC_DESTRUCTOR_REGISTER(arg_usr_fstype, freep); | |
62 | STATIC_DESTRUCTOR_REGISTER(arg_usr_options, freep); | |
63 | ||
d5cc4be2 LP |
64 | static int write_options(FILE *f, const char *options) { |
65 | _cleanup_free_ char *o = NULL; | |
66 | ||
67 | if (isempty(options)) | |
68 | return 0; | |
69 | ||
70 | if (streq(options, "defaults")) | |
71 | return 0; | |
72 | ||
98bad05e | 73 | o = specifier_escape(options); |
d5cc4be2 LP |
74 | if (!o) |
75 | return log_oom(); | |
76 | ||
77 | fprintf(f, "Options=%s\n", o); | |
78 | return 1; | |
79 | } | |
80 | ||
19d0833b LP |
81 | static int write_what(FILE *f, const char *what) { |
82 | _cleanup_free_ char *w = NULL; | |
83 | ||
98bad05e | 84 | w = specifier_escape(what); |
19d0833b LP |
85 | if (!w) |
86 | return log_oom(); | |
87 | ||
88 | fprintf(f, "What=%s\n", w); | |
89 | return 1; | |
90 | } | |
91 | ||
5607d856 ZJS |
92 | static int add_swap( |
93 | const char *what, | |
94 | struct mntent *me, | |
4191418b | 95 | MountpointFlags flags) { |
5607d856 | 96 | |
fb883e75 | 97 | _cleanup_free_ char *name = NULL; |
7fd1b19b | 98 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 99 | int r; |
6b1dc2bd LP |
100 | |
101 | assert(what); | |
102 | assert(me); | |
103 | ||
00b4ffde LP |
104 | if (access("/proc/swaps", F_OK) < 0) { |
105 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
106 | return 0; | |
107 | } | |
108 | ||
75f86906 | 109 | if (detect_container() > 0) { |
689aede8 LP |
110 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
111 | return 0; | |
112 | } | |
113 | ||
7410616c LP |
114 | r = unit_name_from_path(what, ".swap", &name); |
115 | if (r < 0) | |
116 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 117 | |
fb883e75 ZJS |
118 | r = generator_open_unit_file(arg_dest, "/etc/fstab", name, &f); |
119 | if (r < 0) | |
120 | return r; | |
0d536673 LP |
121 | |
122 | fputs("# Automatically generated by systemd-fstab-generator\n\n" | |
123 | "[Unit]\n" | |
124 | "SourcePath=/etc/fstab\n" | |
125 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n\n" | |
126 | "[Swap]\n", f); | |
19d0833b LP |
127 | |
128 | r = write_what(f, what); | |
129 | if (r < 0) | |
130 | return r; | |
6b1dc2bd | 131 | |
d5cc4be2 LP |
132 | r = write_options(f, me->mnt_opts); |
133 | if (r < 0) | |
134 | return r; | |
6b1dc2bd | 135 | |
47cb901e | 136 | r = fflush_and_check(f); |
23bbb0de | 137 | if (r < 0) |
fb883e75 | 138 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 139 | |
b3208b66 | 140 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 141 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
142 | if (r < 0) |
143 | return r; | |
144 | ||
da495a03 ZJS |
145 | if (flags & MAKEFS) { |
146 | r = generator_hook_up_mkswap(arg_dest, what); | |
147 | if (r < 0) | |
148 | return r; | |
149 | } | |
150 | ||
7f2806d5 ZJS |
151 | if (flags & GROWFS) |
152 | /* TODO: swap devices must be wiped and recreated */ | |
153 | log_warning("%s: growing swap devices is currently unsupported.", what); | |
154 | ||
4191418b | 155 | if (!(flags & NOAUTO)) { |
630d30d3 | 156 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
4191418b | 157 | (flags & NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
158 | if (r < 0) |
159 | return r; | |
4e82fe52 TG |
160 | } |
161 | ||
d0aa9ce5 | 162 | return 0; |
6b1dc2bd LP |
163 | } |
164 | ||
6b1dc2bd LP |
165 | static bool mount_is_network(struct mntent *me) { |
166 | assert(me); | |
167 | ||
b9f111b9 ZJS |
168 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
169 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
170 | } |
171 | ||
3d22d1ab TG |
172 | static bool mount_in_initrd(struct mntent *me) { |
173 | assert(me); | |
174 | ||
b9f111b9 ZJS |
175 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
176 | streq(me->mnt_dir, "/usr"); | |
3d22d1ab TG |
177 | } |
178 | ||
110773f6 | 179 | static int write_timeout(FILE *f, const char *where, const char *opts, |
0004f698 | 180 | const char *filter, const char *variable) { |
deb0a77c MO |
181 | _cleanup_free_ char *timeout = NULL; |
182 | char timespan[FORMAT_TIMESPAN_MAX]; | |
183 | usec_t u; | |
184 | int r; | |
185 | ||
110773f6 | 186 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL); |
deb0a77c MO |
187 | if (r < 0) |
188 | return log_warning_errno(r, "Failed to parse options: %m"); | |
189 | if (r == 0) | |
190 | return 0; | |
191 | ||
0004f698 | 192 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
193 | if (r < 0) { |
194 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
195 | return 0; | |
196 | } | |
197 | ||
110773f6 | 198 | fprintf(f, "%s=%s\n", variable, format_timespan(timespan, sizeof(timespan), u, 0)); |
deb0a77c MO |
199 | |
200 | return 0; | |
201 | } | |
2e852276 | 202 | |
110773f6 CH |
203 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
204 | return write_timeout(f, where, opts, | |
205 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
206 | } | |
207 | ||
208 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
209 | return write_timeout(f, where, opts, | |
210 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
211 | } | |
212 | ||
ae325185 RB |
213 | static int write_dependency(FILE *f, const char *opts, |
214 | const char *filter, const char *format) { | |
3519d230 KZ |
215 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
216 | _cleanup_free_ char *res = NULL; | |
217 | char **s; | |
218 | int r; | |
219 | ||
220 | assert(f); | |
221 | assert(opts); | |
222 | ||
ae325185 | 223 | r = fstab_extract_values(opts, filter, &names); |
3519d230 KZ |
224 | if (r < 0) |
225 | return log_warning_errno(r, "Failed to parse options: %m"); | |
226 | if (r == 0) | |
227 | return 0; | |
228 | ||
229 | STRV_FOREACH(s, names) { | |
230 | char *x; | |
231 | ||
37cbc1d5 | 232 | r = unit_name_mangle_with_suffix(*s, 0, ".mount", &x); |
3519d230 KZ |
233 | if (r < 0) |
234 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
235 | r = strv_consume(&units, x); | |
236 | if (r < 0) | |
237 | return log_oom(); | |
238 | } | |
239 | ||
240 | if (units) { | |
241 | res = strv_join(units, " "); | |
242 | if (!res) | |
243 | return log_oom(); | |
4a027e19 MP |
244 | #pragma GCC diagnostic push |
245 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
ae325185 | 246 | fprintf(f, format, res); |
4a027e19 | 247 | #pragma GCC diagnostic pop |
3519d230 KZ |
248 | } |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
ae325185 RB |
253 | static int write_after(FILE *f, const char *opts) { |
254 | return write_dependency(f, opts, "x-systemd.after", "After=%1$s\n"); | |
255 | } | |
256 | ||
257 | static int write_requires_after(FILE *f, const char *opts) { | |
258 | return write_dependency(f, opts, | |
259 | "x-systemd.requires", "After=%1$s\nRequires=%1$s\n"); | |
260 | } | |
261 | ||
262 | static int write_before(FILE *f, const char *opts) { | |
263 | return write_dependency(f, opts, | |
264 | "x-systemd.before", "Before=%1$s\n"); | |
265 | } | |
266 | ||
3519d230 | 267 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
98bad05e | 268 | _cleanup_strv_free_ char **paths = NULL, **paths_escaped = NULL; |
3519d230 KZ |
269 | _cleanup_free_ char *res = NULL; |
270 | int r; | |
271 | ||
272 | assert(f); | |
273 | assert(opts); | |
274 | ||
275 | r = fstab_extract_values(opts, "x-systemd.requires-mounts-for", &paths); | |
276 | if (r < 0) | |
277 | return log_warning_errno(r, "Failed to parse options: %m"); | |
278 | if (r == 0) | |
279 | return 0; | |
280 | ||
98bad05e LP |
281 | r = specifier_escape_strv(paths, &paths_escaped); |
282 | if (r < 0) | |
283 | return log_error_errno(r, "Failed to escape paths: %m"); | |
284 | ||
285 | res = strv_join(paths_escaped, " "); | |
3519d230 KZ |
286 | if (!res) |
287 | return log_oom(); | |
288 | ||
289 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
e8d2f6cd | 294 | static int add_mount( |
91214a37 | 295 | const char *dest, |
e8d2f6cd LP |
296 | const char *what, |
297 | const char *where, | |
634735b5 | 298 | const char *original_where, |
6db615c1 | 299 | const char *fstype, |
e8d2f6cd LP |
300 | const char *opts, |
301 | int passno, | |
4191418b | 302 | MountpointFlags flags, |
e8d2f6cd | 303 | const char *post, |
e8d2f6cd | 304 | const char *source) { |
e48fdd84 | 305 | |
7fd1b19b | 306 | _cleanup_free_ char |
da495a03 | 307 | *name = NULL, |
fb883e75 | 308 | *automount_name = NULL, |
98bad05e LP |
309 | *filtered = NULL, |
310 | *where_escaped = NULL; | |
7fd1b19b | 311 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 312 | int r; |
6b1dc2bd LP |
313 | |
314 | assert(what); | |
315 | assert(where); | |
5e398e54 | 316 | assert(opts); |
0d3d3be1 | 317 | assert(post); |
5e398e54 | 318 | assert(source); |
6b1dc2bd | 319 | |
6db615c1 | 320 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
321 | return 0; |
322 | ||
323 | if (!is_path(where)) { | |
324 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
325 | return 0; | |
326 | } | |
327 | ||
328 | if (mount_point_is_api(where) || | |
329 | mount_point_ignore(where)) | |
330 | return 0; | |
331 | ||
e48fdd84 | 332 | if (path_equal(where, "/")) { |
4191418b | 333 | if (flags & NOAUTO) |
2e852276 | 334 | log_warning("Ignoring \"noauto\" for root device"); |
4191418b | 335 | if (flags & NOFAIL) |
2e852276 | 336 | log_warning("Ignoring \"nofail\" for root device"); |
4191418b | 337 | if (flags & AUTOMOUNT) |
2e852276 ZJS |
338 | log_warning("Ignoring automount option for root device"); |
339 | ||
4191418b | 340 | SET_FLAG(flags, NOAUTO | NOFAIL | AUTOMOUNT, false); |
e48fdd84 LP |
341 | } |
342 | ||
7410616c LP |
343 | r = unit_name_from_path(where, ".mount", &name); |
344 | if (r < 0) | |
345 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 346 | |
fb883e75 ZJS |
347 | r = generator_open_unit_file(dest, "/etc/fstab", name, &f); |
348 | if (r < 0) | |
349 | return r; | |
0d536673 | 350 | |
5e398e54 | 351 | fprintf(f, |
c3834f9b LP |
352 | "[Unit]\n" |
353 | "SourcePath=%s\n" | |
354 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
355 | source); | |
6b1dc2bd | 356 | |
4191418b | 357 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !(flags & AUTOMOUNT) && |
65e1dee7 N |
358 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
359 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
360 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
361 | * As we are making 'bg' mounts look like an 'fg' mount to | |
362 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
363 | * we need to explicitly preserve that default, and also ensure | |
364 | * the systemd mount-timeout doesn't interfere. | |
365 | * By placing these options first, they can be over-ridden by | |
366 | * settings in /etc/fstab. */ | |
367 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,", opts, ",fg"); | |
4191418b | 368 | SET_FLAG(flags, NOFAIL, true); |
65e1dee7 N |
369 | } |
370 | ||
4191418b | 371 | if (!(flags & NOFAIL) && !(flags & AUTOMOUNT)) |
5ecdcf41 | 372 | fprintf(f, "Before=%s\n", post); |
6b1dc2bd | 373 | |
4191418b | 374 | if (!(flags & AUTOMOUNT) && opts) { |
ae325185 RB |
375 | r = write_after(f, opts); |
376 | if (r < 0) | |
377 | return r; | |
3519d230 | 378 | r = write_requires_after(f, opts); |
ae325185 RB |
379 | if (r < 0) |
380 | return r; | |
381 | r = write_before(f, opts); | |
3519d230 KZ |
382 | if (r < 0) |
383 | return r; | |
384 | r = write_requires_mounts_for(f, opts); | |
385 | if (r < 0) | |
386 | return r; | |
387 | } | |
388 | ||
e48fdd84 | 389 | if (passno != 0) { |
91214a37 | 390 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
391 | if (r < 0) |
392 | return r; | |
393 | } | |
64e70e4b | 394 | |
634735b5 CW |
395 | fprintf(f, "\n[Mount]\n"); |
396 | if (original_where) | |
397 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
98bad05e LP |
398 | |
399 | where_escaped = specifier_escape(where); | |
400 | if (!where_escaped) | |
401 | return log_oom(); | |
402 | fprintf(f, "Where=%s\n", where_escaped); | |
6db615c1 | 403 | |
19d0833b LP |
404 | r = write_what(f, what); |
405 | if (r < 0) | |
406 | return r; | |
407 | ||
98bad05e LP |
408 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
409 | _cleanup_free_ char *t; | |
410 | ||
411 | t = specifier_escape(fstype); | |
412 | if (!t) | |
413 | return -ENOMEM; | |
414 | ||
415 | fprintf(f, "Type=%s\n", t); | |
416 | } | |
6b1dc2bd | 417 | |
91214a37 | 418 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
419 | if (r < 0) |
420 | return r; | |
421 | ||
4195077a MK |
422 | r = generator_write_device_deps(dest, what, where, opts); |
423 | if (r < 0) | |
424 | return r; | |
425 | ||
110773f6 CH |
426 | r = write_mount_timeout(f, where, opts); |
427 | if (r < 0) | |
428 | return r; | |
429 | ||
d5cc4be2 LP |
430 | r = write_options(f, filtered); |
431 | if (r < 0) | |
432 | return r; | |
5e398e54 | 433 | |
4652c56c ZJS |
434 | r = fflush_and_check(f); |
435 | if (r < 0) | |
fb883e75 | 436 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 437 | |
da495a03 ZJS |
438 | if (flags & MAKEFS) { |
439 | r = generator_hook_up_mkfs(dest, what, where, fstype); | |
440 | if (r < 0) | |
441 | return r; | |
442 | } | |
443 | ||
7f2806d5 ZJS |
444 | if (flags & GROWFS) { |
445 | r = generator_hook_up_growfs(dest, where, post); | |
446 | if (r < 0) | |
447 | return r; | |
448 | } | |
449 | ||
4191418b | 450 | if (!(flags & NOAUTO) && !(flags & AUTOMOUNT)) { |
630d30d3 | 451 | r = generator_add_symlink(dest, post, |
4191418b | 452 | (flags & NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
453 | if (r < 0) |
454 | return r; | |
6b1dc2bd LP |
455 | } |
456 | ||
4191418b | 457 | if (flags & AUTOMOUNT) { |
7410616c LP |
458 | r = unit_name_from_path(where, ".automount", &automount_name); |
459 | if (r < 0) | |
460 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 461 | |
6b1dc2bd | 462 | fclose(f); |
6b1dc2bd | 463 | |
fb883e75 ZJS |
464 | r = generator_open_unit_file(dest, "/etc/fstab", automount_name, &f); |
465 | if (r < 0) | |
466 | return r; | |
0d536673 | 467 | |
6b1dc2bd | 468 | fprintf(f, |
6b1dc2bd | 469 | "[Unit]\n" |
c3834f9b LP |
470 | "SourcePath=%s\n" |
471 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
472 | source); |
473 | ||
0d3d3be1 | 474 | fprintf(f, "Before=%s\n", post); |
700e07ff | 475 | |
3519d230 | 476 | if (opts) { |
ae325185 RB |
477 | r = write_after(f, opts); |
478 | if (r < 0) | |
479 | return r; | |
3519d230 | 480 | r = write_requires_after(f, opts); |
ae325185 RB |
481 | if (r < 0) |
482 | return r; | |
483 | r = write_before(f, opts); | |
3519d230 KZ |
484 | if (r < 0) |
485 | return r; | |
486 | r = write_requires_mounts_for(f, opts); | |
487 | if (r < 0) | |
488 | return r; | |
489 | } | |
490 | ||
700e07ff | 491 | fprintf(f, |
bd10a84b | 492 | "\n" |
6b1dc2bd LP |
493 | "[Automount]\n" |
494 | "Where=%s\n", | |
98bad05e | 495 | where_escaped); |
6b1dc2bd | 496 | |
336b5c61 | 497 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
498 | if (r < 0) |
499 | return r; | |
500 | ||
4652c56c ZJS |
501 | r = fflush_and_check(f); |
502 | if (r < 0) | |
fb883e75 | 503 | return log_error_errno(r, "Failed to write unit file %s: %m", automount_name); |
6b1dc2bd | 504 | |
630d30d3 | 505 | r = generator_add_symlink(dest, post, |
4191418b | 506 | (flags & NOFAIL) ? "wants" : "requires", automount_name); |
630d30d3 ZJS |
507 | if (r < 0) |
508 | return r; | |
6b1dc2bd LP |
509 | } |
510 | ||
d0aa9ce5 | 511 | return 0; |
6b1dc2bd LP |
512 | } |
513 | ||
e48fdd84 | 514 | static int parse_fstab(bool initrd) { |
6db615c1 | 515 | _cleanup_endmntent_ FILE *f = NULL; |
e48fdd84 | 516 | const char *fstab_path; |
6b1dc2bd | 517 | struct mntent *me; |
e48fdd84 | 518 | int r = 0; |
6b1dc2bd | 519 | |
e48fdd84 | 520 | fstab_path = initrd ? "/sysroot/etc/fstab" : "/etc/fstab"; |
01a0f7d0 ZJS |
521 | log_debug("Parsing %s...", fstab_path); |
522 | ||
e48fdd84 | 523 | f = setmntent(fstab_path, "re"); |
6b1dc2bd LP |
524 | if (!f) { |
525 | if (errno == ENOENT) | |
526 | return 0; | |
527 | ||
592288a2 | 528 | return log_error_errno(errno, "Failed to open %s: %m", fstab_path); |
6b1dc2bd LP |
529 | } |
530 | ||
531 | while ((me = getmntent(f))) { | |
634735b5 | 532 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
7f2806d5 | 533 | bool makefs, growfs, noauto, nofail; |
6b1dc2bd LP |
534 | int k; |
535 | ||
3d22d1ab TG |
536 | if (initrd && !mount_in_initrd(me)) |
537 | continue; | |
538 | ||
6b1dc2bd | 539 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
540 | if (!what) |
541 | return log_oom(); | |
542 | ||
a3e7ea02 | 543 | if (is_device_path(what) && path_is_read_only_fs("/sys") > 0) { |
689aede8 LP |
544 | log_info("Running in a container, ignoring fstab device entry for %s.", what); |
545 | continue; | |
546 | } | |
547 | ||
98eda38a | 548 | where = strdup(me->mnt_dir); |
e48fdd84 | 549 | if (!where) |
5862d652 | 550 | return log_oom(); |
6b1dc2bd | 551 | |
634735b5 | 552 | if (is_path(where)) { |
858d36c1 | 553 | path_simplify(where, false); |
f1a2c758 | 554 | |
634735b5 CW |
555 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
556 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
557 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
558 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
f1a2c758 | 559 | * target is the final directory. */ |
634735b5 CW |
560 | r = chase_symlinks(where, initrd ? "/sysroot" : NULL, |
561 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, | |
562 | &canonical_where); | |
f1a2c758 LP |
563 | if (r < 0) /* If we can't canonicalize we continue on as if it wasn't a symlink */ |
564 | log_debug_errno(r, "Failed to read symlink target for %s, ignoring: %m", where); | |
565 | else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */ | |
566 | canonical_where = mfree(canonical_where); | |
567 | else | |
568 | log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where); | |
634735b5 | 569 | } |
6b1dc2bd | 570 | |
da495a03 | 571 | makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0"); |
7f2806d5 | 572 | growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0"); |
b9f111b9 ZJS |
573 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
574 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
f1a2c758 | 575 | |
ac1d4c79 | 576 | log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s noauto=%s nofail=%s", |
5607d856 | 577 | what, where, me->mnt_type, |
ac1d4c79 | 578 | yes_no(makefs), yes_no(growfs), |
5607d856 | 579 | yes_no(noauto), yes_no(nofail)); |
6b1dc2bd LP |
580 | |
581 | if (streq(me->mnt_type, "swap")) | |
4191418b | 582 | k = add_swap(what, me, |
7f2806d5 | 583 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL); |
5e398e54 | 584 | else { |
5607d856 | 585 | bool automount; |
80c3b720 | 586 | const char *post; |
5e398e54 | 587 | |
b9f111b9 ZJS |
588 | automount = fstab_test_option(me->mnt_opts, |
589 | "comment=systemd.automount\0" | |
590 | "x-systemd.automount\0"); | |
e48fdd84 | 591 | if (initrd) |
700e07ff | 592 | post = SPECIAL_INITRD_FS_TARGET; |
e48fdd84 | 593 | else if (mount_is_network(me)) |
0c17fbce | 594 | post = SPECIAL_REMOTE_FS_TARGET; |
e48fdd84 | 595 | else |
0c17fbce | 596 | post = SPECIAL_LOCAL_FS_TARGET; |
5e398e54 | 597 | |
91214a37 LP |
598 | k = add_mount(arg_dest, |
599 | what, | |
634735b5 CW |
600 | canonical_where ?: where, |
601 | canonical_where ? where: NULL, | |
6db615c1 LP |
602 | me->mnt_type, |
603 | me->mnt_opts, | |
604 | me->mnt_passno, | |
7f2806d5 | 605 | makefs*MAKEFS | growfs*GROWFS | noauto*NOAUTO | nofail*NOFAIL | automount*AUTOMOUNT, |
6db615c1 LP |
606 | post, |
607 | fstab_path); | |
5e398e54 | 608 | } |
6b1dc2bd | 609 | |
7f2806d5 | 610 | if (r >= 0 && k < 0) |
6b1dc2bd LP |
611 | r = k; |
612 | } | |
613 | ||
6b1dc2bd LP |
614 | return r; |
615 | } | |
616 | ||
2e852276 | 617 | static int add_sysroot_mount(void) { |
75a59316 ZJS |
618 | _cleanup_free_ char *what = NULL; |
619 | const char *opts; | |
7163e1ca | 620 | int r; |
5e398e54 | 621 | |
093c2cfe TH |
622 | if (isempty(arg_root_what)) { |
623 | log_debug("Could not find a root= entry on the kernel command line."); | |
624 | return 0; | |
135b5212 | 625 | } |
5e398e54 | 626 | |
138f4c69 LP |
627 | if (streq(arg_root_what, "gpt-auto")) { |
628 | /* This is handled by the gpt-auto generator */ | |
629 | log_debug("Skipping root directory handling, as gpt-auto was requested."); | |
630 | return 0; | |
631 | } | |
632 | ||
e34e72fb | 633 | if (path_equal(arg_root_what, "/dev/nfs")) { |
3ade16c9 HH |
634 | /* This is handled by the kernel or the initrd */ |
635 | log_debug("Skipping root directory handling, as /dev/nfs was requested."); | |
636 | return 0; | |
637 | } | |
638 | ||
093c2cfe TH |
639 | what = fstab_node_to_udev_node(arg_root_what); |
640 | if (!what) | |
171181bc | 641 | return log_oom(); |
093c2cfe | 642 | |
6db615c1 | 643 | if (!arg_root_options) |
75a59316 ZJS |
644 | opts = arg_root_rw > 0 ? "rw" : "ro"; |
645 | else if (arg_root_rw >= 0 || | |
d15d0333 | 646 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 647 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
648 | else |
649 | opts = arg_root_options; | |
5e398e54 | 650 | |
6db615c1 | 651 | log_debug("Found entry what=%s where=/sysroot type=%s", what, strna(arg_root_fstype)); |
7163e1ca DD |
652 | |
653 | if (is_device_path(what)) { | |
654 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
655 | if (r < 0) | |
656 | return r; | |
657 | } | |
658 | ||
91214a37 LP |
659 | return add_mount(arg_dest, |
660 | what, | |
6db615c1 | 661 | "/sysroot", |
634735b5 | 662 | NULL, |
6db615c1 | 663 | arg_root_fstype, |
75a59316 | 664 | opts, |
f113f8e3 | 665 | is_device_path(what) ? 1 : 0, /* passno */ |
7f2806d5 | 666 | 0, /* makefs off, growfs off, noauto off, nofail off, automount off */ |
6db615c1 LP |
667 | SPECIAL_INITRD_ROOT_FS_TARGET, |
668 | "/proc/cmdline"); | |
5e398e54 TG |
669 | } |
670 | ||
2e852276 | 671 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
672 | _cleanup_free_ char *what = NULL; |
673 | const char *opts; | |
674 | ||
675 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
676 | return 0; | |
677 | ||
678 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 679 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 680 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
681 | if (!arg_usr_what) |
682 | return log_oom(); | |
683 | } | |
684 | ||
685 | if (arg_root_fstype && !arg_usr_fstype) { | |
686 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
687 | if (!arg_usr_fstype) |
688 | return log_oom(); | |
689 | } | |
690 | ||
691 | if (arg_root_options && !arg_usr_options) { | |
692 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
693 | if (!arg_usr_options) |
694 | return log_oom(); | |
695 | } | |
696 | ||
eb580002 | 697 | if (!arg_usr_what) |
9f103625 TH |
698 | return 0; |
699 | ||
700 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
701 | if (!what) |
702 | return log_oom(); | |
9f103625 | 703 | |
eb580002 MM |
704 | if (!arg_usr_options) |
705 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 706 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 707 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
708 | else |
709 | opts = arg_usr_options; | |
9f103625 TH |
710 | |
711 | log_debug("Found entry what=%s where=/sysroot/usr type=%s", what, strna(arg_usr_fstype)); | |
91214a37 LP |
712 | return add_mount(arg_dest, |
713 | what, | |
9f103625 | 714 | "/sysroot/usr", |
634735b5 | 715 | NULL, |
9f103625 TH |
716 | arg_usr_fstype, |
717 | opts, | |
f113f8e3 | 718 | is_device_path(what) ? 1 : 0, /* passno */ |
4191418b | 719 | 0, |
104bc12f | 720 | SPECIAL_INITRD_FS_TARGET, |
9f103625 TH |
721 | "/proc/cmdline"); |
722 | } | |
723 | ||
91214a37 | 724 | static int add_volatile_root(void) { |
91214a37 LP |
725 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is |
726 | * requested, leaving only /usr from the root mount inside. */ | |
727 | ||
00bb366d ZJS |
728 | if (arg_volatile_mode != VOLATILE_YES) |
729 | return 0; | |
91214a37 | 730 | |
00bb366d | 731 | return generator_add_symlink(arg_dest, SPECIAL_INITRD_ROOT_FS_TARGET, "requires", |
312da637 | 732 | SYSTEM_DATA_UNIT_PATH "/" SPECIAL_VOLATILE_ROOT_SERVICE); |
91214a37 LP |
733 | } |
734 | ||
735 | static int add_volatile_var(void) { | |
736 | ||
737 | if (arg_volatile_mode != VOLATILE_STATE) | |
738 | return 0; | |
739 | ||
740 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
741 | ||
742 | return add_mount(arg_dest_late, | |
743 | "tmpfs", | |
744 | "/var", | |
634735b5 | 745 | NULL, |
91214a37 LP |
746 | "tmpfs", |
747 | "mode=0755", | |
748 | 0, | |
4191418b | 749 | 0, |
91214a37 LP |
750 | SPECIAL_LOCAL_FS_TARGET, |
751 | "/proc/cmdline"); | |
752 | } | |
753 | ||
96287a49 | 754 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 755 | int r; |
94734142 | 756 | |
9f103625 TH |
757 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
758 | * instance should take precedence. In the case of multiple rootflags= | |
759 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 760 | |
1d84ad94 | 761 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 762 | |
1d84ad94 | 763 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 764 | if (r < 0) |
059cb385 | 765 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 766 | else |
e48fdd84 | 767 | arg_fstab_enabled = r; |
94734142 | 768 | |
1d84ad94 LP |
769 | } else if (streq(key, "root")) { |
770 | ||
771 | if (proc_cmdline_value_missing(key, value)) | |
772 | return 0; | |
6db615c1 | 773 | |
f88dc3ed | 774 | if (free_and_strdup(&arg_root_what, value) < 0) |
6db615c1 LP |
775 | return log_oom(); |
776 | ||
1d84ad94 LP |
777 | } else if (streq(key, "rootfstype")) { |
778 | ||
779 | if (proc_cmdline_value_missing(key, value)) | |
780 | return 0; | |
6db615c1 | 781 | |
f88dc3ed | 782 | if (free_and_strdup(&arg_root_fstype, value) < 0) |
6db615c1 LP |
783 | return log_oom(); |
784 | ||
1d84ad94 | 785 | } else if (streq(key, "rootflags")) { |
6db615c1 | 786 | |
1d84ad94 LP |
787 | if (proc_cmdline_value_missing(key, value)) |
788 | return 0; | |
789 | ||
6c782b7a | 790 | if (!strextend_with_separator(&arg_root_options, ",", value, NULL)) |
6db615c1 LP |
791 | return log_oom(); |
792 | ||
2f3dfc6f LP |
793 | } else if (streq(key, "roothash")) { |
794 | ||
795 | if (proc_cmdline_value_missing(key, value)) | |
796 | return 0; | |
797 | ||
798 | if (free_and_strdup(&arg_root_hash, value) < 0) | |
799 | return log_oom(); | |
6db615c1 | 800 | |
1d84ad94 LP |
801 | } else if (streq(key, "mount.usr")) { |
802 | ||
803 | if (proc_cmdline_value_missing(key, value)) | |
804 | return 0; | |
9f103625 TH |
805 | |
806 | if (free_and_strdup(&arg_usr_what, value) < 0) | |
807 | return log_oom(); | |
808 | ||
1d84ad94 LP |
809 | } else if (streq(key, "mount.usrfstype")) { |
810 | ||
811 | if (proc_cmdline_value_missing(key, value)) | |
812 | return 0; | |
9f103625 TH |
813 | |
814 | if (free_and_strdup(&arg_usr_fstype, value) < 0) | |
815 | return log_oom(); | |
816 | ||
1d84ad94 | 817 | } else if (streq(key, "mount.usrflags")) { |
9f103625 | 818 | |
1d84ad94 LP |
819 | if (proc_cmdline_value_missing(key, value)) |
820 | return 0; | |
821 | ||
6c782b7a | 822 | if (!strextend_with_separator(&arg_usr_options, ",", value, NULL)) |
9f103625 TH |
823 | return log_oom(); |
824 | ||
6db615c1 LP |
825 | } else if (streq(key, "rw") && !value) |
826 | arg_root_rw = true; | |
827 | else if (streq(key, "ro") && !value) | |
828 | arg_root_rw = false; | |
91214a37 LP |
829 | else if (streq(key, "systemd.volatile")) { |
830 | VolatileMode m; | |
831 | ||
832 | if (value) { | |
833 | m = volatile_mode_from_string(value); | |
834 | if (m < 0) | |
835 | log_warning("Failed to parse systemd.volatile= argument: %s", value); | |
836 | else | |
837 | arg_volatile_mode = m; | |
838 | } else | |
839 | arg_volatile_mode = VOLATILE_YES; | |
840 | } | |
94734142 | 841 | |
d0aa9ce5 | 842 | return 0; |
94734142 LP |
843 | } |
844 | ||
2f3dfc6f LP |
845 | static int determine_root(void) { |
846 | /* If we have a root hash but no root device then Verity is used, and we use the "root" DM device as root. */ | |
847 | ||
848 | if (arg_root_what) | |
849 | return 0; | |
850 | ||
851 | if (!arg_root_hash) | |
852 | return 0; | |
853 | ||
854 | arg_root_what = strdup("/dev/mapper/root"); | |
855 | if (!arg_root_what) | |
856 | return log_oom(); | |
857 | ||
858 | log_info("Using verity root device %s.", arg_root_what); | |
859 | ||
860 | return 1; | |
861 | } | |
862 | ||
7a44c7e3 | 863 | static int run(const char *dest, const char *dest_early, const char *dest_late) { |
2572957e | 864 | int r, r2 = 0, r3 = 0; |
6b1dc2bd | 865 | |
7a44c7e3 ZJS |
866 | assert_se(arg_dest = dest); |
867 | assert_se(arg_dest_late = dest_late); | |
6b1dc2bd | 868 | |
1d84ad94 | 869 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 870 | if (r < 0) |
da927ba9 | 871 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 872 | |
2f3dfc6f LP |
873 | (void) determine_root(); |
874 | ||
9f103625 TH |
875 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
876 | if (in_initrd()) { | |
2e852276 | 877 | r = add_sysroot_mount(); |
003cba39 | 878 | |
2572957e | 879 | r2 = add_sysroot_usr_mount(); |
91214a37 | 880 | |
2572957e | 881 | r3 = add_volatile_root(); |
003cba39 | 882 | } else |
91214a37 | 883 | r = add_volatile_var(); |
5e398e54 | 884 | |
e48fdd84 LP |
885 | /* Honour /etc/fstab only when that's enabled */ |
886 | if (arg_fstab_enabled) { | |
e48fdd84 | 887 | /* Parse the local /etc/fstab, possibly from the initrd */ |
2572957e | 888 | r2 = parse_fstab(false); |
ac4785b0 | 889 | |
e48fdd84 | 890 | /* If running in the initrd also parse the /etc/fstab from the host */ |
2572957e ZJS |
891 | if (in_initrd()) |
892 | r3 = parse_fstab(true); | |
9b69569d ZJS |
893 | else |
894 | r3 = generator_enable_remount_fs_service(arg_dest); | |
e48fdd84 | 895 | } |
6b1dc2bd | 896 | |
2572957e | 897 | return r < 0 ? r : r2 < 0 ? r2 : r3; |
6b1dc2bd | 898 | } |
a4ef3e4d | 899 | |
7a44c7e3 | 900 | DEFINE_MAIN_GENERATOR_FUNCTION(run); |