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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
6b1dc2bd | 2 | |
6b1dc2bd | 3 | #include <errno.h> |
07630cea | 4 | #include <stdio.h> |
6b1dc2bd LP |
5 | #include <unistd.h> |
6 | ||
b5efdb8a | 7 | #include "alloc-util.h" |
028a981c ZJS |
8 | #include "bus-error.h" |
9 | #include "bus-locator.h" | |
f4351959 | 10 | #include "chase-symlinks.h" |
3ffd4af2 | 11 | #include "fd-util.h" |
0d39fa9c | 12 | #include "fileio.h" |
d15d0333 | 13 | #include "fstab-util.h" |
07630cea | 14 | #include "generator.h" |
77b8e92d | 15 | #include "in-addr-util.h" |
baa6a42d | 16 | #include "initrd-util.h" |
07630cea | 17 | #include "log.h" |
a4ef3e4d | 18 | #include "main-func.h" |
07630cea | 19 | #include "mkdir.h" |
6b1dc2bd | 20 | #include "mount-setup.h" |
4349cd7c | 21 | #include "mount-util.h" |
049af8ad | 22 | #include "mountpoint-util.h" |
6bedfcbb | 23 | #include "parse-util.h" |
07630cea | 24 | #include "path-util.h" |
4e731273 | 25 | #include "proc-cmdline.h" |
028a981c | 26 | #include "process-util.h" |
6b1dc2bd | 27 | #include "special.h" |
98bad05e | 28 | #include "specifier.h" |
8fcde012 | 29 | #include "stat-util.h" |
07630cea | 30 | #include "string-util.h" |
059cb385 | 31 | #include "strv.h" |
07630cea | 32 | #include "unit-name.h" |
689aede8 | 33 | #include "virt.h" |
91214a37 | 34 | #include "volatile-util.h" |
6b1dc2bd | 35 | |
d2194e15 LP |
36 | typedef enum MountPointFlags { |
37 | MOUNT_NOAUTO = 1 << 0, | |
38 | MOUNT_NOFAIL = 1 << 1, | |
39 | MOUNT_AUTOMOUNT = 1 << 2, | |
40 | MOUNT_MAKEFS = 1 << 3, | |
41 | MOUNT_GROWFS = 1 << 4, | |
42 | MOUNT_RW_ONLY = 1 << 5, | |
04959faa | 43 | MOUNT_PCRFS = 1 << 6, |
d2194e15 | 44 | } MountPointFlags; |
4191418b | 45 | |
028a981c | 46 | static bool arg_sysroot_check = false; |
7a44c7e3 ZJS |
47 | static const char *arg_dest = NULL; |
48 | static const char *arg_dest_late = NULL; | |
e48fdd84 | 49 | static bool arg_fstab_enabled = true; |
567a5307 | 50 | static bool arg_swap_enabled = true; |
6db615c1 LP |
51 | static char *arg_root_what = NULL; |
52 | static char *arg_root_fstype = NULL; | |
53 | static char *arg_root_options = NULL; | |
2f3dfc6f | 54 | static char *arg_root_hash = NULL; |
6db615c1 | 55 | static int arg_root_rw = -1; |
9f103625 TH |
56 | static char *arg_usr_what = NULL; |
57 | static char *arg_usr_fstype = NULL; | |
58 | static char *arg_usr_options = NULL; | |
c1b9e3df | 59 | static char *arg_usr_hash = NULL; |
91214a37 | 60 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 61 | |
a4ef3e4d YW |
62 | STATIC_DESTRUCTOR_REGISTER(arg_root_what, freep); |
63 | STATIC_DESTRUCTOR_REGISTER(arg_root_fstype, freep); | |
64 | STATIC_DESTRUCTOR_REGISTER(arg_root_options, freep); | |
65 | STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep); | |
66 | STATIC_DESTRUCTOR_REGISTER(arg_usr_what, freep); | |
67 | STATIC_DESTRUCTOR_REGISTER(arg_usr_fstype, freep); | |
68 | STATIC_DESTRUCTOR_REGISTER(arg_usr_options, freep); | |
c1b9e3df | 69 | STATIC_DESTRUCTOR_REGISTER(arg_usr_hash, freep); |
a4ef3e4d | 70 | |
d5cc4be2 LP |
71 | static int write_options(FILE *f, const char *options) { |
72 | _cleanup_free_ char *o = NULL; | |
73 | ||
74 | if (isempty(options)) | |
75 | return 0; | |
76 | ||
77 | if (streq(options, "defaults")) | |
78 | return 0; | |
79 | ||
98bad05e | 80 | o = specifier_escape(options); |
d5cc4be2 LP |
81 | if (!o) |
82 | return log_oom(); | |
83 | ||
84 | fprintf(f, "Options=%s\n", o); | |
85 | return 1; | |
86 | } | |
87 | ||
19d0833b LP |
88 | static int write_what(FILE *f, const char *what) { |
89 | _cleanup_free_ char *w = NULL; | |
90 | ||
98bad05e | 91 | w = specifier_escape(what); |
19d0833b LP |
92 | if (!w) |
93 | return log_oom(); | |
94 | ||
95 | fprintf(f, "What=%s\n", w); | |
96 | return 1; | |
97 | } | |
98 | ||
5607d856 | 99 | static int add_swap( |
7772c177 | 100 | const char *source, |
5607d856 ZJS |
101 | const char *what, |
102 | struct mntent *me, | |
d2194e15 | 103 | MountPointFlags flags) { |
5607d856 | 104 | |
fb883e75 | 105 | _cleanup_free_ char *name = NULL; |
7fd1b19b | 106 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 107 | int r; |
6b1dc2bd LP |
108 | |
109 | assert(what); | |
110 | assert(me); | |
111 | ||
567a5307 | 112 | if (!arg_swap_enabled) { |
113 | log_info("Swap unit generation disabled on kernel command line, ignoring fstab swap entry for %s.", what); | |
114 | return 0; | |
115 | } | |
116 | ||
00b4ffde LP |
117 | if (access("/proc/swaps", F_OK) < 0) { |
118 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
119 | return 0; | |
120 | } | |
121 | ||
75f86906 | 122 | if (detect_container() > 0) { |
689aede8 LP |
123 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
124 | return 0; | |
125 | } | |
126 | ||
028a981c ZJS |
127 | if (arg_sysroot_check) { |
128 | log_info("%s should be enabled in the initrd, will request daemon-reload.", what); | |
129 | return true; | |
130 | } | |
131 | ||
7410616c LP |
132 | r = unit_name_from_path(what, ".swap", &name); |
133 | if (r < 0) | |
134 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 135 | |
7772c177 | 136 | r = generator_open_unit_file(arg_dest, source, name, &f); |
fb883e75 ZJS |
137 | if (r < 0) |
138 | return r; | |
0d536673 | 139 | |
ed4ad488 ZJS |
140 | fprintf(f, |
141 | "[Unit]\n" | |
a7e88558 LP |
142 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
143 | "SourcePath=%s\n", | |
7772c177 | 144 | source); |
19d0833b | 145 | |
a7e88558 LP |
146 | r = generator_write_blockdev_dependency(f, what); |
147 | if (r < 0) | |
148 | return r; | |
149 | ||
150 | fprintf(f, | |
151 | "\n" | |
152 | "[Swap]\n"); | |
153 | ||
19d0833b LP |
154 | r = write_what(f, what); |
155 | if (r < 0) | |
156 | return r; | |
6b1dc2bd | 157 | |
d5cc4be2 LP |
158 | r = write_options(f, me->mnt_opts); |
159 | if (r < 0) | |
160 | return r; | |
6b1dc2bd | 161 | |
47cb901e | 162 | r = fflush_and_check(f); |
23bbb0de | 163 | if (r < 0) |
fb883e75 | 164 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 165 | |
b3208b66 | 166 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 167 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
168 | if (r < 0) |
169 | return r; | |
170 | ||
d2194e15 | 171 | if (flags & MOUNT_MAKEFS) { |
da495a03 ZJS |
172 | r = generator_hook_up_mkswap(arg_dest, what); |
173 | if (r < 0) | |
174 | return r; | |
175 | } | |
176 | ||
d2194e15 | 177 | if (flags & MOUNT_GROWFS) |
7f2806d5 ZJS |
178 | /* TODO: swap devices must be wiped and recreated */ |
179 | log_warning("%s: growing swap devices is currently unsupported.", what); | |
04959faa LP |
180 | if (flags & MOUNT_PCRFS) |
181 | log_warning("%s: measuring swap devices is currently unsupported.", what); | |
7f2806d5 | 182 | |
d2194e15 | 183 | if (!(flags & MOUNT_NOAUTO)) { |
630d30d3 | 184 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
d2194e15 | 185 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
186 | if (r < 0) |
187 | return r; | |
4e82fe52 TG |
188 | } |
189 | ||
028a981c | 190 | return true; |
6b1dc2bd LP |
191 | } |
192 | ||
6b1dc2bd LP |
193 | static bool mount_is_network(struct mntent *me) { |
194 | assert(me); | |
195 | ||
b9f111b9 ZJS |
196 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
197 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
198 | } |
199 | ||
3d22d1ab TG |
200 | static bool mount_in_initrd(struct mntent *me) { |
201 | assert(me); | |
202 | ||
b9f111b9 | 203 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
efc5fd3d | 204 | path_equal(me->mnt_dir, "/usr"); |
3d22d1ab TG |
205 | } |
206 | ||
33a4c983 LP |
207 | static int write_timeout( |
208 | FILE *f, | |
209 | const char *where, | |
210 | const char *opts, | |
211 | const char *filter, | |
212 | const char *variable) { | |
213 | ||
deb0a77c | 214 | _cleanup_free_ char *timeout = NULL; |
deb0a77c MO |
215 | usec_t u; |
216 | int r; | |
217 | ||
ff0c31bc | 218 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL, NULL); |
deb0a77c MO |
219 | if (r < 0) |
220 | return log_warning_errno(r, "Failed to parse options: %m"); | |
221 | if (r == 0) | |
222 | return 0; | |
223 | ||
0004f698 | 224 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
225 | if (r < 0) { |
226 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
227 | return 0; | |
228 | } | |
229 | ||
5291f26d | 230 | fprintf(f, "%s=%s\n", variable, FORMAT_TIMESPAN(u, 0)); |
deb0a77c MO |
231 | |
232 | return 0; | |
233 | } | |
2e852276 | 234 | |
110773f6 CH |
235 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
236 | return write_timeout(f, where, opts, | |
237 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
238 | } | |
239 | ||
240 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
241 | return write_timeout(f, where, opts, | |
242 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
243 | } | |
244 | ||
33a4c983 LP |
245 | static int write_dependency( |
246 | FILE *f, | |
247 | const char *opts, | |
248 | const char *filter, | |
249 | const char *format) { | |
250 | ||
3519d230 KZ |
251 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
252 | _cleanup_free_ char *res = NULL; | |
3519d230 KZ |
253 | int r; |
254 | ||
255 | assert(f); | |
256 | assert(opts); | |
257 | ||
d6cef552 | 258 | r = fstab_filter_options(opts, filter, NULL, NULL, &names, NULL); |
3519d230 KZ |
259 | if (r < 0) |
260 | return log_warning_errno(r, "Failed to parse options: %m"); | |
261 | if (r == 0) | |
262 | return 0; | |
263 | ||
264 | STRV_FOREACH(s, names) { | |
265 | char *x; | |
266 | ||
df7c4eb6 | 267 | r = unit_name_mangle_with_suffix(*s, "as dependency", 0, ".mount", &x); |
3519d230 KZ |
268 | if (r < 0) |
269 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
33a4c983 | 270 | |
3519d230 KZ |
271 | r = strv_consume(&units, x); |
272 | if (r < 0) | |
273 | return log_oom(); | |
274 | } | |
275 | ||
276 | if (units) { | |
277 | res = strv_join(units, " "); | |
278 | if (!res) | |
279 | return log_oom(); | |
56e577c6 LP |
280 | |
281 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
ae325185 | 282 | fprintf(f, format, res); |
56e577c6 | 283 | REENABLE_WARNING; |
3519d230 KZ |
284 | } |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
ae325185 | 289 | static int write_after(FILE *f, const char *opts) { |
33a4c983 | 290 | return write_dependency(f, opts, |
d6cef552 | 291 | "x-systemd.after\0", "After=%1$s\n"); |
ae325185 RB |
292 | } |
293 | ||
294 | static int write_requires_after(FILE *f, const char *opts) { | |
295 | return write_dependency(f, opts, | |
d6cef552 | 296 | "x-systemd.requires\0", "After=%1$s\nRequires=%1$s\n"); |
ae325185 RB |
297 | } |
298 | ||
299 | static int write_before(FILE *f, const char *opts) { | |
300 | return write_dependency(f, opts, | |
d6cef552 | 301 | "x-systemd.before\0", "Before=%1$s\n"); |
ae325185 RB |
302 | } |
303 | ||
3519d230 | 304 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
98bad05e | 305 | _cleanup_strv_free_ char **paths = NULL, **paths_escaped = NULL; |
3519d230 KZ |
306 | _cleanup_free_ char *res = NULL; |
307 | int r; | |
308 | ||
309 | assert(f); | |
310 | assert(opts); | |
311 | ||
d6cef552 | 312 | r = fstab_filter_options(opts, "x-systemd.requires-mounts-for\0", NULL, NULL, &paths, NULL); |
3519d230 KZ |
313 | if (r < 0) |
314 | return log_warning_errno(r, "Failed to parse options: %m"); | |
315 | if (r == 0) | |
316 | return 0; | |
317 | ||
98bad05e LP |
318 | r = specifier_escape_strv(paths, &paths_escaped); |
319 | if (r < 0) | |
320 | return log_error_errno(r, "Failed to escape paths: %m"); | |
321 | ||
322 | res = strv_join(paths_escaped, " "); | |
3519d230 KZ |
323 | if (!res) |
324 | return log_oom(); | |
325 | ||
326 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
6371e69b FB |
331 | static int write_extra_dependencies(FILE *f, const char *opts) { |
332 | int r; | |
333 | ||
334 | assert(f); | |
335 | ||
336 | if (opts) { | |
337 | r = write_after(f, opts); | |
338 | if (r < 0) | |
339 | return r; | |
340 | r = write_requires_after(f, opts); | |
341 | if (r < 0) | |
342 | return r; | |
343 | r = write_before(f, opts); | |
344 | if (r < 0) | |
345 | return r; | |
346 | r = write_requires_mounts_for(f, opts); | |
347 | if (r < 0) | |
348 | return r; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
e8d2f6cd | 354 | static int add_mount( |
7772c177 | 355 | const char *source, |
91214a37 | 356 | const char *dest, |
e8d2f6cd LP |
357 | const char *what, |
358 | const char *where, | |
634735b5 | 359 | const char *original_where, |
6db615c1 | 360 | const char *fstype, |
e8d2f6cd LP |
361 | const char *opts, |
362 | int passno, | |
d2194e15 | 363 | MountPointFlags flags, |
da69e8e4 | 364 | const char *target_unit) { |
e48fdd84 | 365 | |
7fd1b19b | 366 | _cleanup_free_ char |
da495a03 | 367 | *name = NULL, |
fb883e75 | 368 | *automount_name = NULL, |
98bad05e LP |
369 | *filtered = NULL, |
370 | *where_escaped = NULL; | |
be02c1cf | 371 | _cleanup_strv_free_ char **wanted_by = NULL, **required_by = NULL; |
7fd1b19b | 372 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 373 | int r; |
6b1dc2bd LP |
374 | |
375 | assert(what); | |
376 | assert(where); | |
5e398e54 | 377 | assert(opts); |
da69e8e4 | 378 | assert(target_unit); |
5e398e54 | 379 | assert(source); |
6b1dc2bd | 380 | |
6db615c1 | 381 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
382 | return 0; |
383 | ||
384 | if (!is_path(where)) { | |
385 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
386 | return 0; | |
387 | } | |
388 | ||
389 | if (mount_point_is_api(where) || | |
390 | mount_point_ignore(where)) | |
391 | return 0; | |
392 | ||
028a981c ZJS |
393 | if (arg_sysroot_check) { |
394 | log_info("%s should be mounted in the initrd, will request daemon-reload.", where); | |
395 | return true; | |
396 | } | |
397 | ||
d6cef552 | 398 | r = fstab_filter_options(opts, "x-systemd.wanted-by\0", NULL, NULL, &wanted_by, NULL); |
be02c1cf AR |
399 | if (r < 0) |
400 | return r; | |
401 | ||
d6cef552 | 402 | r = fstab_filter_options(opts, "x-systemd.required-by\0", NULL, NULL, &required_by, NULL); |
be02c1cf AR |
403 | if (r < 0) |
404 | return r; | |
405 | ||
e48fdd84 | 406 | if (path_equal(where, "/")) { |
d2194e15 LP |
407 | if (flags & MOUNT_NOAUTO) |
408 | log_warning("Ignoring \"noauto\" option for root device"); | |
409 | if (flags & MOUNT_NOFAIL) | |
410 | log_warning("Ignoring \"nofail\" option for root device"); | |
411 | if (flags & MOUNT_AUTOMOUNT) | |
412 | log_warning("Ignoring \"automount\" option for root device"); | |
be02c1cf | 413 | if (!strv_isempty(wanted_by)) |
d2194e15 | 414 | log_warning("Ignoring \"x-systemd.wanted-by=\" option for root device"); |
be02c1cf | 415 | if (!strv_isempty(required_by)) |
d2194e15 | 416 | log_warning("Ignoring \"x-systemd.required-by=\" option for root device"); |
2e852276 | 417 | |
be02c1cf AR |
418 | required_by = strv_free(required_by); |
419 | wanted_by = strv_free(wanted_by); | |
d2194e15 | 420 | SET_FLAG(flags, MOUNT_NOAUTO | MOUNT_NOFAIL | MOUNT_AUTOMOUNT, false); |
e48fdd84 LP |
421 | } |
422 | ||
7410616c LP |
423 | r = unit_name_from_path(where, ".mount", &name); |
424 | if (r < 0) | |
425 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 426 | |
7772c177 | 427 | r = generator_open_unit_file(dest, source, name, &f); |
fb883e75 ZJS |
428 | if (r < 0) |
429 | return r; | |
0d536673 | 430 | |
5e398e54 | 431 | fprintf(f, |
c3834f9b | 432 | "[Unit]\n" |
a7e88558 LP |
433 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
434 | "SourcePath=%s\n", | |
c3834f9b | 435 | source); |
6b1dc2bd | 436 | |
d2194e15 | 437 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !(flags & MOUNT_AUTOMOUNT) && |
65e1dee7 N |
438 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
439 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
440 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
441 | * As we are making 'bg' mounts look like an 'fg' mount to | |
442 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
443 | * we need to explicitly preserve that default, and also ensure | |
444 | * the systemd mount-timeout doesn't interfere. | |
5a12d1ca | 445 | * By placing these options first, they can be overridden by |
65e1dee7 | 446 | * settings in /etc/fstab. */ |
e66d2eee | 447 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,nofail,", opts, ",fg"); |
d2194e15 | 448 | SET_FLAG(flags, MOUNT_NOFAIL, true); |
65e1dee7 N |
449 | } |
450 | ||
6371e69b FB |
451 | r = write_extra_dependencies(f, opts); |
452 | if (r < 0) | |
453 | return r; | |
3519d230 | 454 | |
da69e8e4 | 455 | /* Order the mount unit we generate relative to target_unit, so that DefaultDependencies= on the |
fa138f5e | 456 | * target unit won't affect us. */ |
da69e8e4 ZJS |
457 | if (!FLAGS_SET(flags, MOUNT_NOFAIL)) |
458 | fprintf(f, "Before=%s\n", target_unit); | |
fa138f5e | 459 | |
e48fdd84 | 460 | if (passno != 0) { |
91214a37 | 461 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
462 | if (r < 0) |
463 | return r; | |
464 | } | |
64e70e4b | 465 | |
a7e88558 LP |
466 | r = generator_write_blockdev_dependency(f, what); |
467 | if (r < 0) | |
468 | return r; | |
469 | ||
470 | fprintf(f, | |
471 | "\n" | |
472 | "[Mount]\n"); | |
473 | ||
b2efed52 ZJS |
474 | r = write_what(f, what); |
475 | if (r < 0) | |
476 | return r; | |
477 | ||
634735b5 CW |
478 | if (original_where) |
479 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
98bad05e LP |
480 | |
481 | where_escaped = specifier_escape(where); | |
482 | if (!where_escaped) | |
483 | return log_oom(); | |
484 | fprintf(f, "Where=%s\n", where_escaped); | |
6db615c1 | 485 | |
98bad05e | 486 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
c2b2df60 | 487 | _cleanup_free_ char *t = NULL; |
98bad05e LP |
488 | |
489 | t = specifier_escape(fstype); | |
490 | if (!t) | |
491 | return -ENOMEM; | |
492 | ||
493 | fprintf(f, "Type=%s\n", t); | |
494 | } | |
6b1dc2bd | 495 | |
91214a37 | 496 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
497 | if (r < 0) |
498 | return r; | |
499 | ||
4195077a MK |
500 | r = generator_write_device_deps(dest, what, where, opts); |
501 | if (r < 0) | |
502 | return r; | |
503 | ||
110773f6 CH |
504 | r = write_mount_timeout(f, where, opts); |
505 | if (r < 0) | |
506 | return r; | |
507 | ||
d5cc4be2 LP |
508 | r = write_options(f, filtered); |
509 | if (r < 0) | |
510 | return r; | |
5e398e54 | 511 | |
d2194e15 | 512 | if (flags & MOUNT_RW_ONLY) |
f42aa416 MH |
513 | fprintf(f, "ReadWriteOnly=yes\n"); |
514 | ||
4652c56c ZJS |
515 | r = fflush_and_check(f); |
516 | if (r < 0) | |
fb883e75 | 517 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 518 | |
d2194e15 | 519 | if (flags & MOUNT_MAKEFS) { |
da495a03 ZJS |
520 | r = generator_hook_up_mkfs(dest, what, where, fstype); |
521 | if (r < 0) | |
522 | return r; | |
523 | } | |
524 | ||
d2194e15 | 525 | if (flags & MOUNT_GROWFS) { |
da69e8e4 | 526 | r = generator_hook_up_growfs(dest, where, target_unit); |
7f2806d5 ZJS |
527 | if (r < 0) |
528 | return r; | |
529 | } | |
530 | ||
04959faa LP |
531 | if (flags & MOUNT_PCRFS) { |
532 | r = generator_hook_up_pcrfs(dest, where, target_unit); | |
533 | if (r < 0) | |
534 | return r; | |
535 | } | |
536 | ||
d2194e15 LP |
537 | if (!FLAGS_SET(flags, MOUNT_AUTOMOUNT)) { |
538 | if (!FLAGS_SET(flags, MOUNT_NOAUTO) && strv_isempty(wanted_by) && strv_isempty(required_by)) { | |
da69e8e4 | 539 | r = generator_add_symlink(dest, target_unit, |
d2194e15 | 540 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", name); |
be02c1cf AR |
541 | if (r < 0) |
542 | return r; | |
543 | } else { | |
be02c1cf AR |
544 | STRV_FOREACH(s, wanted_by) { |
545 | r = generator_add_symlink(dest, *s, "wants", name); | |
546 | if (r < 0) | |
547 | return r; | |
548 | } | |
549 | ||
550 | STRV_FOREACH(s, required_by) { | |
551 | r = generator_add_symlink(dest, *s, "requires", name); | |
552 | if (r < 0) | |
553 | return r; | |
554 | } | |
555 | } | |
556 | } else { | |
7410616c LP |
557 | r = unit_name_from_path(where, ".automount", &automount_name); |
558 | if (r < 0) | |
559 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 560 | |
8a7033ac | 561 | f = safe_fclose(f); |
6b1dc2bd | 562 | |
7772c177 | 563 | r = generator_open_unit_file(dest, source, automount_name, &f); |
fb883e75 ZJS |
564 | if (r < 0) |
565 | return r; | |
0d536673 | 566 | |
6b1dc2bd | 567 | fprintf(f, |
6b1dc2bd | 568 | "[Unit]\n" |
c3834f9b LP |
569 | "SourcePath=%s\n" |
570 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
571 | source); |
572 | ||
700e07ff | 573 | fprintf(f, |
bd10a84b | 574 | "\n" |
6b1dc2bd LP |
575 | "[Automount]\n" |
576 | "Where=%s\n", | |
98bad05e | 577 | where_escaped); |
6b1dc2bd | 578 | |
336b5c61 | 579 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
580 | if (r < 0) |
581 | return r; | |
582 | ||
4652c56c ZJS |
583 | r = fflush_and_check(f); |
584 | if (r < 0) | |
fb883e75 | 585 | return log_error_errno(r, "Failed to write unit file %s: %m", automount_name); |
6b1dc2bd | 586 | |
da69e8e4 | 587 | r = generator_add_symlink(dest, target_unit, |
d2194e15 | 588 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", automount_name); |
630d30d3 ZJS |
589 | if (r < 0) |
590 | return r; | |
6b1dc2bd LP |
591 | } |
592 | ||
028a981c ZJS |
593 | return true; |
594 | } | |
595 | ||
596 | static int do_daemon_reload(void) { | |
597 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
598 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
599 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
600 | int r, k; | |
601 | ||
602 | log_debug("Calling org.freedesktop.systemd1.Manager.Reload()..."); | |
603 | ||
604 | r = bus_connect_system_systemd(&bus); | |
605 | if (r < 0) | |
606 | return log_error_errno(r, "Failed to get D-Bus connection: %m"); | |
607 | ||
608 | r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "Reload"); | |
609 | if (r < 0) | |
610 | return bus_log_create_error(r); | |
611 | ||
612 | r = sd_bus_call(bus, m, DAEMON_RELOAD_TIMEOUT_SEC, &error, NULL); | |
613 | if (r < 0) | |
614 | return log_error_errno(r, "Failed to reload daemon: %s", bus_error_message(&error, r)); | |
615 | ||
616 | /* We need to requeue the two targets so that any new units which previously were not part of the | |
617 | * targets, and which we now added, will be started. */ | |
618 | ||
619 | r = 0; | |
620 | FOREACH_STRING(unit, SPECIAL_INITRD_FS_TARGET, SPECIAL_SWAP_TARGET) { | |
621 | log_info("Requesting %s/start/replace...", unit); | |
622 | ||
623 | k = sd_bus_call_method(bus, | |
624 | "org.freedesktop.systemd1", | |
625 | "/org/freedesktop/systemd1", | |
626 | "org.freedesktop.systemd1.Manager", | |
627 | "StartUnit", | |
628 | &error, | |
629 | NULL, | |
630 | "ss", unit, "replace"); | |
631 | if (k < 0) { | |
632 | log_error_errno(k, "Failed to (re)start %s: %s", unit, bus_error_message(&error, r)); | |
633 | if (r == 0) | |
634 | r = k; | |
635 | } | |
636 | } | |
637 | ||
638 | return r; | |
6b1dc2bd LP |
639 | } |
640 | ||
99e3d476 ZJS |
641 | static const char* sysroot_fstab_path(void) { |
642 | return getenv("SYSTEMD_SYSROOT_FSTAB") ?: "/sysroot/etc/fstab"; | |
643 | } | |
644 | ||
e48fdd84 | 645 | static int parse_fstab(bool initrd) { |
6db615c1 | 646 | _cleanup_endmntent_ FILE *f = NULL; |
ed4ad488 | 647 | const char *fstab; |
6b1dc2bd | 648 | struct mntent *me; |
e48fdd84 | 649 | int r = 0; |
6b1dc2bd | 650 | |
99e3d476 ZJS |
651 | if (initrd) |
652 | fstab = sysroot_fstab_path(); | |
028a981c | 653 | else { |
99e3d476 | 654 | fstab = fstab_path(); |
028a981c ZJS |
655 | assert(!arg_sysroot_check); |
656 | } | |
99e3d476 | 657 | |
ed4ad488 | 658 | log_debug("Parsing %s...", fstab); |
01a0f7d0 | 659 | |
ed4ad488 | 660 | f = setmntent(fstab, "re"); |
6b1dc2bd LP |
661 | if (!f) { |
662 | if (errno == ENOENT) | |
663 | return 0; | |
664 | ||
ed4ad488 | 665 | return log_error_errno(errno, "Failed to open %s: %m", fstab); |
6b1dc2bd LP |
666 | } |
667 | ||
668 | while ((me = getmntent(f))) { | |
634735b5 | 669 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
04959faa | 670 | bool makefs, growfs, pcrfs, noauto, nofail; |
d2194e15 | 671 | MountPointFlags flags; |
6b1dc2bd LP |
672 | int k; |
673 | ||
3d22d1ab TG |
674 | if (initrd && !mount_in_initrd(me)) |
675 | continue; | |
676 | ||
6b1dc2bd | 677 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
678 | if (!what) |
679 | return log_oom(); | |
680 | ||
18f0eaaf YW |
681 | if (path_is_read_only_fs("/sys") > 0) { |
682 | if (streq(what, "sysfs")) { | |
c41fff1e | 683 | log_info("/sys/ is read-only (running in a container?), ignoring fstab entry for %s.", me->mnt_dir); |
18f0eaaf YW |
684 | continue; |
685 | } | |
686 | ||
687 | if (is_device_path(what)) { | |
c41fff1e | 688 | log_info("/sys/ is read-only (running in a container?), ignoring fstab device entry for %s.", what); |
18f0eaaf YW |
689 | continue; |
690 | } | |
689aede8 LP |
691 | } |
692 | ||
98eda38a | 693 | where = strdup(me->mnt_dir); |
e48fdd84 | 694 | if (!where) |
5862d652 | 695 | return log_oom(); |
6b1dc2bd | 696 | |
634735b5 | 697 | if (is_path(where)) { |
4ff361cc | 698 | path_simplify(where); |
f1a2c758 | 699 | |
634735b5 CW |
700 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
701 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
702 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
703 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
ff52ff25 ZJS |
704 | * target is the final directory. |
705 | * | |
706 | * FIXME: when chase_symlinks() learns to chase non-existent paths, use this here and | |
707 | * drop the prefixing with /sysroot on error below. | |
708 | */ | |
1677b88d | 709 | k = chase_symlinks(where, initrd ? "/sysroot" : NULL, |
634735b5 | 710 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, |
a5648b80 | 711 | &canonical_where, NULL); |
ff52ff25 ZJS |
712 | if (k < 0) { |
713 | /* If we can't canonicalize, continue as if it wasn't a symlink */ | |
714 | log_debug_errno(k, "Failed to read symlink target for %s, using as-is: %m", where); | |
715 | ||
716 | if (initrd) { | |
717 | canonical_where = path_join("/sysroot", where); | |
718 | if (!canonical_where) | |
719 | return log_oom(); | |
720 | } | |
721 | ||
722 | } else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */ | |
f1a2c758 LP |
723 | canonical_where = mfree(canonical_where); |
724 | else | |
725 | log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where); | |
634735b5 | 726 | } |
6b1dc2bd | 727 | |
da495a03 | 728 | makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0"); |
7f2806d5 | 729 | growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0"); |
04959faa | 730 | pcrfs = fstab_test_option(me->mnt_opts, "x-systemd.pcrfs\0"); |
b9f111b9 ZJS |
731 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
732 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
f1a2c758 | 733 | |
04959faa | 734 | log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s pcrfs=%s noauto=%s nofail=%s", |
5607d856 | 735 | what, where, me->mnt_type, |
04959faa | 736 | yes_no(makefs), yes_no(growfs), yes_no(pcrfs), |
5607d856 | 737 | yes_no(noauto), yes_no(nofail)); |
6b1dc2bd | 738 | |
d2194e15 LP |
739 | flags = makefs * MOUNT_MAKEFS | |
740 | growfs * MOUNT_GROWFS | | |
04959faa | 741 | pcrfs * MOUNT_PCRFS | |
d2194e15 LP |
742 | noauto * MOUNT_NOAUTO | |
743 | nofail * MOUNT_NOFAIL; | |
744 | ||
6b1dc2bd | 745 | if (streq(me->mnt_type, "swap")) |
7772c177 | 746 | k = add_swap(fstab, what, me, flags); |
5e398e54 | 747 | else { |
d2194e15 | 748 | bool rw_only, automount; |
5e398e54 | 749 | |
d2194e15 | 750 | rw_only = fstab_test_option(me->mnt_opts, "x-systemd.rw-only\0"); |
b9f111b9 ZJS |
751 | automount = fstab_test_option(me->mnt_opts, |
752 | "comment=systemd.automount\0" | |
753 | "x-systemd.automount\0"); | |
d2194e15 LP |
754 | |
755 | flags |= rw_only * MOUNT_RW_ONLY | | |
756 | automount * MOUNT_AUTOMOUNT; | |
757 | ||
da69e8e4 ZJS |
758 | const char *target_unit = |
759 | initrd ? SPECIAL_INITRD_FS_TARGET : | |
760 | mount_is_network(me) ? SPECIAL_REMOTE_FS_TARGET : | |
761 | SPECIAL_LOCAL_FS_TARGET; | |
5e398e54 | 762 | |
7772c177 ZJS |
763 | k = add_mount(fstab, |
764 | arg_dest, | |
91214a37 | 765 | what, |
634735b5 CW |
766 | canonical_where ?: where, |
767 | canonical_where ? where: NULL, | |
6db615c1 LP |
768 | me->mnt_type, |
769 | me->mnt_opts, | |
770 | me->mnt_passno, | |
d2194e15 | 771 | flags, |
da69e8e4 | 772 | target_unit); |
5e398e54 | 773 | } |
6b1dc2bd | 774 | |
028a981c ZJS |
775 | if (arg_sysroot_check && k > 0) |
776 | return true; /* We found a mount or swap that would be started… */ | |
7f2806d5 | 777 | if (r >= 0 && k < 0) |
6b1dc2bd LP |
778 | r = k; |
779 | } | |
780 | ||
6b1dc2bd LP |
781 | return r; |
782 | } | |
783 | ||
77b8e92d YW |
784 | static int sysroot_is_nfsroot(void) { |
785 | union in_addr_union u; | |
786 | const char *sep, *a; | |
787 | int r; | |
788 | ||
789 | assert(arg_root_what); | |
790 | ||
791 | /* From dracut.cmdline(7). | |
792 | * | |
793 | * root=[<server-ip>:]<root-dir>[:<nfs-options>] | |
794 | * root=nfs:[<server-ip>:]<root-dir>[:<nfs-options>], | |
795 | * root=nfs4:[<server-ip>:]<root-dir>[:<nfs-options>], | |
796 | * root={dhcp|dhcp6} | |
797 | * | |
798 | * mount nfs share from <server-ip>:/<root-dir>, if no server-ip is given, use dhcp next_server. | |
799 | * If server-ip is an IPv6 address it has to be put in brackets, e.g. [2001:DB8::1]. NFS options | |
800 | * can be appended with the prefix ":" or "," and are separated by ",". */ | |
801 | ||
802 | if (path_equal(arg_root_what, "/dev/nfs") || | |
803 | STR_IN_SET(arg_root_what, "dhcp", "dhcp6") || | |
804 | STARTSWITH_SET(arg_root_what, "nfs:", "nfs4:")) | |
805 | return true; | |
806 | ||
807 | /* IPv6 address */ | |
808 | if (arg_root_what[0] == '[') { | |
809 | sep = strchr(arg_root_what + 1, ']'); | |
810 | if (!sep) | |
811 | return -EINVAL; | |
812 | ||
ea1c9d3f | 813 | a = strndupa_safe(arg_root_what + 1, sep - arg_root_what - 1); |
77b8e92d YW |
814 | |
815 | r = in_addr_from_string(AF_INET6, a, &u); | |
816 | if (r < 0) | |
817 | return r; | |
818 | ||
819 | return true; | |
820 | } | |
821 | ||
822 | /* IPv4 address */ | |
823 | sep = strchr(arg_root_what, ':'); | |
824 | if (sep) { | |
ea1c9d3f | 825 | a = strndupa_safe(arg_root_what, sep - arg_root_what); |
77b8e92d YW |
826 | |
827 | if (in_addr_from_string(AF_INET, a, &u) >= 0) | |
828 | return true; | |
829 | } | |
830 | ||
831 | /* root directory without address */ | |
832 | return path_is_absolute(arg_root_what) && !path_startswith(arg_root_what, "/dev"); | |
833 | } | |
834 | ||
2e852276 | 835 | static int add_sysroot_mount(void) { |
75a59316 | 836 | _cleanup_free_ char *what = NULL; |
725ad3b0 | 837 | const char *opts, *fstype; |
01fdfbb8 WF |
838 | bool default_rw, makefs; |
839 | MountPointFlags flags; | |
7163e1ca | 840 | int r; |
5e398e54 | 841 | |
093c2cfe TH |
842 | if (isempty(arg_root_what)) { |
843 | log_debug("Could not find a root= entry on the kernel command line."); | |
844 | return 0; | |
135b5212 | 845 | } |
5e398e54 | 846 | |
138f4c69 | 847 | if (streq(arg_root_what, "gpt-auto")) { |
4981427c | 848 | /* This is handled by gpt-auto-generator */ |
138f4c69 LP |
849 | log_debug("Skipping root directory handling, as gpt-auto was requested."); |
850 | return 0; | |
851 | } | |
852 | ||
77b8e92d YW |
853 | r = sysroot_is_nfsroot(); |
854 | if (r < 0) | |
855 | log_debug_errno(r, "Failed to determine if the root directory is on NFS, assuming not: %m"); | |
856 | else if (r > 0) { | |
3ade16c9 | 857 | /* This is handled by the kernel or the initrd */ |
77b8e92d | 858 | log_debug("Skipping root directory handling, as root on NFS was requested."); |
155e1bb4 YW |
859 | return 0; |
860 | } | |
861 | ||
862 | if (startswith(arg_root_what, "cifs://")) { | |
863 | log_debug("Skipping root directory handling, as root on CIFS was requested."); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | if (startswith(arg_root_what, "iscsi:")) { | |
868 | log_debug("Skipping root directory handling, as root on iSCSI was requested."); | |
869 | return 0; | |
870 | } | |
871 | ||
872 | if (startswith(arg_root_what, "live:")) { | |
873 | log_debug("Skipping root directory handling, as root on live image was requested."); | |
3ade16c9 HH |
874 | return 0; |
875 | } | |
876 | ||
725ad3b0 LP |
877 | if (streq(arg_root_what, "tmpfs")) { |
878 | /* If root=tmpfs is specified, then take this as shortcut for a writable tmpfs mount as root */ | |
879 | ||
880 | what = strdup("rootfs"); /* just a pretty name, to show up in /proc/self/mountinfo */ | |
881 | if (!what) | |
882 | return log_oom(); | |
883 | ||
5a12d1ca | 884 | fstype = arg_root_fstype ?: "tmpfs"; /* tmpfs, unless overridden */ |
725ad3b0 | 885 | |
5a12d1ca | 886 | default_rw = true; /* writable, unless overridden */; |
725ad3b0 LP |
887 | } else { |
888 | ||
889 | what = fstab_node_to_udev_node(arg_root_what); | |
890 | if (!what) | |
891 | return log_oom(); | |
892 | ||
893 | fstype = arg_root_fstype; /* if not specified explicitly, don't default to anything here */ | |
894 | ||
5a12d1ca | 895 | default_rw = false; /* read-only, unless overridden */ |
725ad3b0 | 896 | } |
093c2cfe | 897 | |
6db615c1 | 898 | if (!arg_root_options) |
725ad3b0 | 899 | opts = arg_root_rw > 0 || (arg_root_rw < 0 && default_rw) ? "rw" : "ro"; |
75a59316 | 900 | else if (arg_root_rw >= 0 || |
d15d0333 | 901 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 902 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
903 | else |
904 | opts = arg_root_options; | |
5e398e54 | 905 | |
e19ae92a | 906 | log_debug("Found entry what=%s where=/sysroot type=%s opts=%s", what, strna(arg_root_fstype), strempty(opts)); |
7163e1ca DD |
907 | |
908 | if (is_device_path(what)) { | |
909 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
910 | if (r < 0) | |
911 | return r; | |
912 | } | |
913 | ||
01fdfbb8 WF |
914 | makefs = fstab_test_option(opts, "x-systemd.makefs\0"); |
915 | flags = makefs * MOUNT_MAKEFS; | |
916 | ||
7772c177 ZJS |
917 | return add_mount("/proc/cmdline", |
918 | arg_dest, | |
91214a37 | 919 | what, |
6db615c1 | 920 | "/sysroot", |
634735b5 | 921 | NULL, |
725ad3b0 | 922 | fstype, |
75a59316 | 923 | opts, |
f113f8e3 | 924 | is_device_path(what) ? 1 : 0, /* passno */ |
04959faa | 925 | flags, /* makefs off, pcrfs off, noauto off, nofail off, automount off */ |
7772c177 | 926 | SPECIAL_INITRD_ROOT_FS_TARGET); |
5e398e54 TG |
927 | } |
928 | ||
2e852276 | 929 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
930 | _cleanup_free_ char *what = NULL; |
931 | const char *opts; | |
01fdfbb8 WF |
932 | bool makefs; |
933 | MountPointFlags flags; | |
29a24ab2 LP |
934 | int r; |
935 | ||
936 | /* Returns 0 if we didn't do anything, > 0 if we either generated a unit for the /usr/ mount, or we | |
937 | * know for sure something else did */ | |
9f103625 TH |
938 | |
939 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
940 | return 0; | |
941 | ||
942 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 943 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 944 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
945 | if (!arg_usr_what) |
946 | return log_oom(); | |
947 | } | |
948 | ||
949 | if (arg_root_fstype && !arg_usr_fstype) { | |
950 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
951 | if (!arg_usr_fstype) |
952 | return log_oom(); | |
953 | } | |
954 | ||
955 | if (arg_root_options && !arg_usr_options) { | |
956 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
957 | if (!arg_usr_options) |
958 | return log_oom(); | |
959 | } | |
960 | ||
29a24ab2 LP |
961 | if (isempty(arg_usr_what)) { |
962 | log_debug("Could not find a usr= entry on the kernel command line."); | |
9f103625 | 963 | return 0; |
29a24ab2 LP |
964 | } |
965 | ||
966 | if (streq(arg_usr_what, "gpt-auto")) { | |
967 | /* This is handled by the gpt-auto generator */ | |
968 | log_debug("Skipping /usr/ directory handling, as gpt-auto was requested."); | |
969 | return 1; /* systemd-gpt-auto-generator will generate a unit for this, hence report that a | |
970 | * unit file is being created for the host /usr/ mount. */ | |
971 | } | |
972 | ||
973 | if (path_equal(arg_usr_what, "/dev/nfs")) { | |
974 | /* This is handled by the initrd (if at all supported, that is) */ | |
975 | log_debug("Skipping /usr/ directory handling, as /dev/nfs was requested."); | |
976 | return 1; /* As above, report that NFS code will create the unit */ | |
977 | } | |
9f103625 TH |
978 | |
979 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
980 | if (!what) |
981 | return log_oom(); | |
9f103625 | 982 | |
eb580002 MM |
983 | if (!arg_usr_options) |
984 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 985 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 986 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
987 | else |
988 | opts = arg_usr_options; | |
9f103625 | 989 | |
29a24ab2 LP |
990 | /* When mounting /usr from the initrd, we add an extra level of indirection: we first mount the /usr/ |
991 | * partition to /sysusr/usr/, and then afterwards bind mount that to /sysroot/usr/. We do this so | |
992 | * that we can cover for systems that initially only have a /usr/ around and where the root fs needs | |
993 | * to be synthesized, based on configuration included in /usr/, e.g. systemd-repart. Software like | |
994 | * this should order itself after initrd-usr-fs.target and before initrd-fs.target; and it should | |
995 | * look into both /sysusr/ and /sysroot/ for the configuration data to apply. */ | |
996 | ||
997 | log_debug("Found entry what=%s where=/sysusr/usr type=%s opts=%s", what, strna(arg_usr_fstype), strempty(opts)); | |
998 | ||
01fdfbb8 WF |
999 | makefs = fstab_test_option(opts, "x-systemd.makefs\0"); |
1000 | flags = makefs * MOUNT_MAKEFS; | |
1001 | ||
7772c177 ZJS |
1002 | r = add_mount("/proc/cmdline", |
1003 | arg_dest, | |
29a24ab2 LP |
1004 | what, |
1005 | "/sysusr/usr", | |
1006 | NULL, | |
1007 | arg_usr_fstype, | |
1008 | opts, | |
1009 | is_device_path(what) ? 1 : 0, /* passno */ | |
01fdfbb8 | 1010 | flags, |
7772c177 | 1011 | SPECIAL_INITRD_USR_FS_TARGET); |
29a24ab2 LP |
1012 | if (r < 0) |
1013 | return r; | |
1014 | ||
1015 | log_debug("Synthesizing entry what=/sysusr/usr where=/sysrootr/usr opts=bind"); | |
1016 | ||
7772c177 ZJS |
1017 | r = add_mount("/proc/cmdline", |
1018 | arg_dest, | |
29a24ab2 LP |
1019 | "/sysusr/usr", |
1020 | "/sysroot/usr", | |
1021 | NULL, | |
1022 | NULL, | |
1023 | "bind", | |
1024 | 0, | |
1025 | 0, | |
7772c177 | 1026 | SPECIAL_INITRD_FS_TARGET); |
29a24ab2 LP |
1027 | if (r < 0) |
1028 | return r; | |
1029 | ||
1030 | return 1; | |
1031 | } | |
1032 | ||
1033 | static int add_sysroot_usr_mount_or_fallback(void) { | |
1034 | int r; | |
1035 | ||
1036 | r = add_sysroot_usr_mount(); | |
1037 | if (r != 0) | |
1038 | return r; | |
1039 | ||
1040 | /* OK, so we didn't write anything out for /sysusr/usr/ nor /sysroot/usr/. In this case, let's make | |
1041 | * sure that initrd-usr-fs.target is at least ordered after sysroot.mount so that services that order | |
1042 | * themselves get the guarantee that /usr/ is definitely mounted somewhere. */ | |
1043 | ||
1044 | return generator_add_symlink( | |
1045 | arg_dest, | |
1046 | SPECIAL_INITRD_USR_FS_TARGET, | |
1047 | "requires", | |
1048 | "sysroot.mount"); | |
9f103625 TH |
1049 | } |
1050 | ||
91214a37 | 1051 | static int add_volatile_root(void) { |
1de7f825 | 1052 | |
91214a37 | 1053 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is |
1de7f825 | 1054 | * requested (or as an overlayfs), leaving only /usr from the root mount inside. */ |
91214a37 | 1055 | |
1de7f825 | 1056 | if (!IN_SET(arg_volatile_mode, VOLATILE_YES, VOLATILE_OVERLAY)) |
00bb366d | 1057 | return 0; |
91214a37 | 1058 | |
00bb366d | 1059 | return generator_add_symlink(arg_dest, SPECIAL_INITRD_ROOT_FS_TARGET, "requires", |
835cf75a | 1060 | SYSTEM_DATA_UNIT_DIR "/" SPECIAL_VOLATILE_ROOT_SERVICE); |
91214a37 LP |
1061 | } |
1062 | ||
1063 | static int add_volatile_var(void) { | |
1064 | ||
1065 | if (arg_volatile_mode != VOLATILE_STATE) | |
1066 | return 0; | |
1067 | ||
1068 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
1069 | ||
7772c177 ZJS |
1070 | return add_mount("/proc/cmdline", |
1071 | arg_dest_late, | |
91214a37 LP |
1072 | "tmpfs", |
1073 | "/var", | |
634735b5 | 1074 | NULL, |
91214a37 | 1075 | "tmpfs", |
7d85383e | 1076 | "mode=0755" TMPFS_LIMITS_VAR, |
91214a37 | 1077 | 0, |
4191418b | 1078 | 0, |
7772c177 | 1079 | SPECIAL_LOCAL_FS_TARGET); |
91214a37 LP |
1080 | } |
1081 | ||
96287a49 | 1082 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 1083 | int r; |
94734142 | 1084 | |
9f103625 TH |
1085 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
1086 | * instance should take precedence. In the case of multiple rootflags= | |
1087 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 1088 | |
1d84ad94 | 1089 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 1090 | |
1d84ad94 | 1091 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 1092 | if (r < 0) |
059cb385 | 1093 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 1094 | else |
e48fdd84 | 1095 | arg_fstab_enabled = r; |
94734142 | 1096 | |
1d84ad94 LP |
1097 | } else if (streq(key, "root")) { |
1098 | ||
1099 | if (proc_cmdline_value_missing(key, value)) | |
1100 | return 0; | |
6db615c1 | 1101 | |
b3f9c17a | 1102 | return free_and_strdup_warn(&arg_root_what, value); |
6db615c1 | 1103 | |
1d84ad94 LP |
1104 | } else if (streq(key, "rootfstype")) { |
1105 | ||
1106 | if (proc_cmdline_value_missing(key, value)) | |
1107 | return 0; | |
6db615c1 | 1108 | |
b3f9c17a | 1109 | return free_and_strdup_warn(&arg_root_fstype, value); |
6db615c1 | 1110 | |
1d84ad94 | 1111 | } else if (streq(key, "rootflags")) { |
6db615c1 | 1112 | |
1d84ad94 LP |
1113 | if (proc_cmdline_value_missing(key, value)) |
1114 | return 0; | |
1115 | ||
c2bc710b | 1116 | if (!strextend_with_separator(&arg_root_options, ",", value)) |
6db615c1 LP |
1117 | return log_oom(); |
1118 | ||
2f3dfc6f LP |
1119 | } else if (streq(key, "roothash")) { |
1120 | ||
1121 | if (proc_cmdline_value_missing(key, value)) | |
1122 | return 0; | |
1123 | ||
b3f9c17a | 1124 | return free_and_strdup_warn(&arg_root_hash, value); |
6db615c1 | 1125 | |
1d84ad94 LP |
1126 | } else if (streq(key, "mount.usr")) { |
1127 | ||
1128 | if (proc_cmdline_value_missing(key, value)) | |
1129 | return 0; | |
9f103625 | 1130 | |
b3f9c17a | 1131 | return free_and_strdup_warn(&arg_usr_what, value); |
9f103625 | 1132 | |
1d84ad94 LP |
1133 | } else if (streq(key, "mount.usrfstype")) { |
1134 | ||
1135 | if (proc_cmdline_value_missing(key, value)) | |
1136 | return 0; | |
9f103625 | 1137 | |
b3f9c17a | 1138 | return free_and_strdup_warn(&arg_usr_fstype, value); |
9f103625 | 1139 | |
1d84ad94 | 1140 | } else if (streq(key, "mount.usrflags")) { |
9f103625 | 1141 | |
1d84ad94 LP |
1142 | if (proc_cmdline_value_missing(key, value)) |
1143 | return 0; | |
1144 | ||
c2bc710b | 1145 | if (!strextend_with_separator(&arg_usr_options, ",", value)) |
9f103625 TH |
1146 | return log_oom(); |
1147 | ||
c1b9e3df MB |
1148 | } else if (streq(key, "usrhash")) { |
1149 | ||
1150 | if (proc_cmdline_value_missing(key, value)) | |
1151 | return 0; | |
1152 | ||
1153 | return free_and_strdup_warn(&arg_usr_hash, value); | |
1154 | ||
6db615c1 LP |
1155 | } else if (streq(key, "rw") && !value) |
1156 | arg_root_rw = true; | |
1157 | else if (streq(key, "ro") && !value) | |
1158 | arg_root_rw = false; | |
91214a37 LP |
1159 | else if (streq(key, "systemd.volatile")) { |
1160 | VolatileMode m; | |
1161 | ||
1162 | if (value) { | |
1163 | m = volatile_mode_from_string(value); | |
1164 | if (m < 0) | |
7211c853 | 1165 | log_warning_errno(m, "Failed to parse systemd.volatile= argument: %s", value); |
91214a37 LP |
1166 | else |
1167 | arg_volatile_mode = m; | |
1168 | } else | |
1169 | arg_volatile_mode = VOLATILE_YES; | |
567a5307 | 1170 | |
1171 | } else if (streq(key, "systemd.swap")) { | |
1172 | ||
1173 | r = value ? parse_boolean(value) : 1; | |
1174 | if (r < 0) | |
1175 | log_warning("Failed to parse systemd.swap switch %s. Ignoring.", value); | |
1176 | else | |
1177 | arg_swap_enabled = r; | |
91214a37 | 1178 | } |
94734142 | 1179 | |
d0aa9ce5 | 1180 | return 0; |
94734142 LP |
1181 | } |
1182 | ||
c1b9e3df | 1183 | static int determine_device(char **what, const char *hash, const char *name) { |
2f3dfc6f | 1184 | |
c1b9e3df MB |
1185 | assert(what); |
1186 | assert(name); | |
1187 | ||
1188 | /* If we have a hash but no device then Verity is used, and we use the DM device. */ | |
1189 | if (*what) | |
2f3dfc6f LP |
1190 | return 0; |
1191 | ||
c1b9e3df | 1192 | if (!hash) |
2f3dfc6f LP |
1193 | return 0; |
1194 | ||
c1b9e3df MB |
1195 | *what = path_join("/dev/mapper/", name); |
1196 | if (!*what) | |
2f3dfc6f LP |
1197 | return log_oom(); |
1198 | ||
c1b9e3df | 1199 | log_info("Using verity %s device %s.", name, *what); |
2f3dfc6f LP |
1200 | |
1201 | return 1; | |
1202 | } | |
1203 | ||
c1b9e3df MB |
1204 | static int determine_root(void) { |
1205 | return determine_device(&arg_root_what, arg_root_hash, "root"); | |
1206 | } | |
1207 | ||
1208 | static int determine_usr(void) { | |
1209 | return determine_device(&arg_usr_what, arg_usr_hash, "usr"); | |
1210 | } | |
1211 | ||
028a981c ZJS |
1212 | /* If arg_sysroot_check is false, run as generator in the usual fashion. |
1213 | * If it is true, check /sysroot/etc/fstab for any units that we'd want to mount | |
1214 | * in the initrd, and call daemon-reload. We will get reinvoked as a generator, | |
1215 | * with /sysroot/etc/fstab available, and then we can write additional units based | |
1216 | * on that file. */ | |
1217 | static int run_generator(void) { | |
2572957e | 1218 | int r, r2 = 0, r3 = 0; |
6b1dc2bd | 1219 | |
1d84ad94 | 1220 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 1221 | if (r < 0) |
da927ba9 | 1222 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 1223 | |
2f3dfc6f | 1224 | (void) determine_root(); |
c1b9e3df | 1225 | (void) determine_usr(); |
2f3dfc6f | 1226 | |
028a981c ZJS |
1227 | if (arg_sysroot_check) { |
1228 | r = parse_fstab(true); | |
1229 | if (r == 0) | |
1230 | log_debug("Nothing interesting found, not doing daemon-reload."); | |
1231 | if (r > 0) | |
1232 | r = do_daemon_reload(); | |
1233 | return r; | |
1234 | } | |
1235 | ||
9f103625 TH |
1236 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
1237 | if (in_initrd()) { | |
2e852276 | 1238 | r = add_sysroot_mount(); |
003cba39 | 1239 | |
29a24ab2 | 1240 | r2 = add_sysroot_usr_mount_or_fallback(); |
91214a37 | 1241 | |
2572957e | 1242 | r3 = add_volatile_root(); |
003cba39 | 1243 | } else |
91214a37 | 1244 | r = add_volatile_var(); |
5e398e54 | 1245 | |
e48fdd84 LP |
1246 | /* Honour /etc/fstab only when that's enabled */ |
1247 | if (arg_fstab_enabled) { | |
e48fdd84 | 1248 | /* Parse the local /etc/fstab, possibly from the initrd */ |
2572957e | 1249 | r2 = parse_fstab(false); |
ac4785b0 | 1250 | |
e48fdd84 | 1251 | /* If running in the initrd also parse the /etc/fstab from the host */ |
2572957e ZJS |
1252 | if (in_initrd()) |
1253 | r3 = parse_fstab(true); | |
9b69569d ZJS |
1254 | else |
1255 | r3 = generator_enable_remount_fs_service(arg_dest); | |
e48fdd84 | 1256 | } |
6b1dc2bd | 1257 | |
2572957e | 1258 | return r < 0 ? r : r2 < 0 ? r2 : r3; |
6b1dc2bd | 1259 | } |
a4ef3e4d | 1260 | |
028a981c ZJS |
1261 | static int run(int argc, char **argv) { |
1262 | arg_sysroot_check = invoked_as(argv, "systemd-sysroot-fstab-check"); | |
1263 | ||
1264 | if (arg_sysroot_check) { | |
1265 | /* Run as in systemd-sysroot-fstab-check mode */ | |
1266 | log_setup(); | |
1267 | ||
1268 | if (strv_length(argv) > 1) | |
1269 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1270 | "This program takes no arguments."); | |
1271 | if (!in_initrd()) | |
1272 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1273 | "This program is only useful in the initrd."); | |
1274 | } else { | |
1275 | /* Run in generator mode */ | |
1276 | log_setup_generator(); | |
1277 | ||
1278 | if (!IN_SET(strv_length(argv), 2, 4)) | |
1279 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1280 | "This program takes one or three arguments."); | |
1281 | ||
1282 | arg_dest = ASSERT_PTR(argv[1]); | |
1283 | arg_dest_late = ASSERT_PTR(argv[argc > 3 ? 3 : 1]); | |
1284 | } | |
1285 | ||
1286 | return run_generator(); | |
1287 | } | |
1288 | ||
1289 | DEFINE_MAIN_FUNCTION(run); |