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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, | |
43 | } MountPointFlags; | |
4191418b | 44 | |
028a981c | 45 | static bool arg_sysroot_check = false; |
7a44c7e3 ZJS |
46 | static const char *arg_dest = NULL; |
47 | static const char *arg_dest_late = NULL; | |
e48fdd84 | 48 | static bool arg_fstab_enabled = true; |
567a5307 | 49 | static bool arg_swap_enabled = true; |
6db615c1 LP |
50 | static char *arg_root_what = NULL; |
51 | static char *arg_root_fstype = NULL; | |
52 | static char *arg_root_options = NULL; | |
2f3dfc6f | 53 | static char *arg_root_hash = NULL; |
6db615c1 | 54 | static int arg_root_rw = -1; |
9f103625 TH |
55 | static char *arg_usr_what = NULL; |
56 | static char *arg_usr_fstype = NULL; | |
57 | static char *arg_usr_options = NULL; | |
c1b9e3df | 58 | static char *arg_usr_hash = NULL; |
91214a37 | 59 | static VolatileMode arg_volatile_mode = _VOLATILE_MODE_INVALID; |
6b1dc2bd | 60 | |
a4ef3e4d YW |
61 | STATIC_DESTRUCTOR_REGISTER(arg_root_what, freep); |
62 | STATIC_DESTRUCTOR_REGISTER(arg_root_fstype, freep); | |
63 | STATIC_DESTRUCTOR_REGISTER(arg_root_options, freep); | |
64 | STATIC_DESTRUCTOR_REGISTER(arg_root_hash, freep); | |
65 | STATIC_DESTRUCTOR_REGISTER(arg_usr_what, freep); | |
66 | STATIC_DESTRUCTOR_REGISTER(arg_usr_fstype, freep); | |
67 | STATIC_DESTRUCTOR_REGISTER(arg_usr_options, freep); | |
c1b9e3df | 68 | STATIC_DESTRUCTOR_REGISTER(arg_usr_hash, freep); |
a4ef3e4d | 69 | |
d5cc4be2 LP |
70 | static int write_options(FILE *f, const char *options) { |
71 | _cleanup_free_ char *o = NULL; | |
72 | ||
73 | if (isempty(options)) | |
74 | return 0; | |
75 | ||
76 | if (streq(options, "defaults")) | |
77 | return 0; | |
78 | ||
98bad05e | 79 | o = specifier_escape(options); |
d5cc4be2 LP |
80 | if (!o) |
81 | return log_oom(); | |
82 | ||
83 | fprintf(f, "Options=%s\n", o); | |
84 | return 1; | |
85 | } | |
86 | ||
19d0833b LP |
87 | static int write_what(FILE *f, const char *what) { |
88 | _cleanup_free_ char *w = NULL; | |
89 | ||
98bad05e | 90 | w = specifier_escape(what); |
19d0833b LP |
91 | if (!w) |
92 | return log_oom(); | |
93 | ||
94 | fprintf(f, "What=%s\n", w); | |
95 | return 1; | |
96 | } | |
97 | ||
5607d856 | 98 | static int add_swap( |
7772c177 | 99 | const char *source, |
5607d856 ZJS |
100 | const char *what, |
101 | struct mntent *me, | |
d2194e15 | 102 | MountPointFlags flags) { |
5607d856 | 103 | |
fb883e75 | 104 | _cleanup_free_ char *name = NULL; |
7fd1b19b | 105 | _cleanup_fclose_ FILE *f = NULL; |
bf1d7ba7 | 106 | int r; |
6b1dc2bd LP |
107 | |
108 | assert(what); | |
109 | assert(me); | |
110 | ||
567a5307 | 111 | if (!arg_swap_enabled) { |
112 | log_info("Swap unit generation disabled on kernel command line, ignoring fstab swap entry for %s.", what); | |
113 | return 0; | |
114 | } | |
115 | ||
00b4ffde LP |
116 | if (access("/proc/swaps", F_OK) < 0) { |
117 | log_info("Swap not supported, ignoring fstab swap entry for %s.", what); | |
118 | return 0; | |
119 | } | |
120 | ||
75f86906 | 121 | if (detect_container() > 0) { |
689aede8 LP |
122 | log_info("Running in a container, ignoring fstab swap entry for %s.", what); |
123 | return 0; | |
124 | } | |
125 | ||
028a981c ZJS |
126 | if (arg_sysroot_check) { |
127 | log_info("%s should be enabled in the initrd, will request daemon-reload.", what); | |
128 | return true; | |
129 | } | |
130 | ||
7410616c LP |
131 | r = unit_name_from_path(what, ".swap", &name); |
132 | if (r < 0) | |
133 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 134 | |
7772c177 | 135 | r = generator_open_unit_file(arg_dest, source, name, &f); |
fb883e75 ZJS |
136 | if (r < 0) |
137 | return r; | |
0d536673 | 138 | |
ed4ad488 ZJS |
139 | fprintf(f, |
140 | "[Unit]\n" | |
a7e88558 LP |
141 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
142 | "SourcePath=%s\n", | |
7772c177 | 143 | source); |
19d0833b | 144 | |
a7e88558 LP |
145 | r = generator_write_blockdev_dependency(f, what); |
146 | if (r < 0) | |
147 | return r; | |
148 | ||
149 | fprintf(f, | |
150 | "\n" | |
151 | "[Swap]\n"); | |
152 | ||
19d0833b LP |
153 | r = write_what(f, what); |
154 | if (r < 0) | |
155 | return r; | |
6b1dc2bd | 156 | |
d5cc4be2 LP |
157 | r = write_options(f, me->mnt_opts); |
158 | if (r < 0) | |
159 | return r; | |
6b1dc2bd | 160 | |
47cb901e | 161 | r = fflush_and_check(f); |
23bbb0de | 162 | if (r < 0) |
fb883e75 | 163 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 164 | |
b3208b66 | 165 | /* use what as where, to have a nicer error message */ |
bf1d7ba7 | 166 | r = generator_write_timeouts(arg_dest, what, what, me->mnt_opts, NULL); |
b3208b66 ZJS |
167 | if (r < 0) |
168 | return r; | |
169 | ||
d2194e15 | 170 | if (flags & MOUNT_MAKEFS) { |
da495a03 ZJS |
171 | r = generator_hook_up_mkswap(arg_dest, what); |
172 | if (r < 0) | |
173 | return r; | |
174 | } | |
175 | ||
d2194e15 | 176 | if (flags & MOUNT_GROWFS) |
7f2806d5 ZJS |
177 | /* TODO: swap devices must be wiped and recreated */ |
178 | log_warning("%s: growing swap devices is currently unsupported.", what); | |
179 | ||
d2194e15 | 180 | if (!(flags & MOUNT_NOAUTO)) { |
630d30d3 | 181 | r = generator_add_symlink(arg_dest, SPECIAL_SWAP_TARGET, |
d2194e15 | 182 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", name); |
630d30d3 ZJS |
183 | if (r < 0) |
184 | return r; | |
4e82fe52 TG |
185 | } |
186 | ||
028a981c | 187 | return true; |
6b1dc2bd LP |
188 | } |
189 | ||
6b1dc2bd LP |
190 | static bool mount_is_network(struct mntent *me) { |
191 | assert(me); | |
192 | ||
b9f111b9 ZJS |
193 | return fstab_test_option(me->mnt_opts, "_netdev\0") || |
194 | fstype_is_network(me->mnt_type); | |
6b1dc2bd LP |
195 | } |
196 | ||
3d22d1ab TG |
197 | static bool mount_in_initrd(struct mntent *me) { |
198 | assert(me); | |
199 | ||
b9f111b9 | 200 | return fstab_test_option(me->mnt_opts, "x-initrd.mount\0") || |
efc5fd3d | 201 | path_equal(me->mnt_dir, "/usr"); |
3d22d1ab TG |
202 | } |
203 | ||
33a4c983 LP |
204 | static int write_timeout( |
205 | FILE *f, | |
206 | const char *where, | |
207 | const char *opts, | |
208 | const char *filter, | |
209 | const char *variable) { | |
210 | ||
deb0a77c | 211 | _cleanup_free_ char *timeout = NULL; |
deb0a77c MO |
212 | usec_t u; |
213 | int r; | |
214 | ||
ff0c31bc | 215 | r = fstab_filter_options(opts, filter, NULL, &timeout, NULL, NULL); |
deb0a77c MO |
216 | if (r < 0) |
217 | return log_warning_errno(r, "Failed to parse options: %m"); | |
218 | if (r == 0) | |
219 | return 0; | |
220 | ||
0004f698 | 221 | r = parse_sec_fix_0(timeout, &u); |
deb0a77c MO |
222 | if (r < 0) { |
223 | log_warning("Failed to parse timeout for %s, ignoring: %s", where, timeout); | |
224 | return 0; | |
225 | } | |
226 | ||
5291f26d | 227 | fprintf(f, "%s=%s\n", variable, FORMAT_TIMESPAN(u, 0)); |
deb0a77c MO |
228 | |
229 | return 0; | |
230 | } | |
2e852276 | 231 | |
110773f6 CH |
232 | static int write_idle_timeout(FILE *f, const char *where, const char *opts) { |
233 | return write_timeout(f, where, opts, | |
234 | "x-systemd.idle-timeout\0", "TimeoutIdleSec"); | |
235 | } | |
236 | ||
237 | static int write_mount_timeout(FILE *f, const char *where, const char *opts) { | |
238 | return write_timeout(f, where, opts, | |
239 | "x-systemd.mount-timeout\0", "TimeoutSec"); | |
240 | } | |
241 | ||
33a4c983 LP |
242 | static int write_dependency( |
243 | FILE *f, | |
244 | const char *opts, | |
245 | const char *filter, | |
246 | const char *format) { | |
247 | ||
3519d230 KZ |
248 | _cleanup_strv_free_ char **names = NULL, **units = NULL; |
249 | _cleanup_free_ char *res = NULL; | |
3519d230 KZ |
250 | int r; |
251 | ||
252 | assert(f); | |
253 | assert(opts); | |
254 | ||
d6cef552 | 255 | r = fstab_filter_options(opts, filter, NULL, NULL, &names, NULL); |
3519d230 KZ |
256 | if (r < 0) |
257 | return log_warning_errno(r, "Failed to parse options: %m"); | |
258 | if (r == 0) | |
259 | return 0; | |
260 | ||
261 | STRV_FOREACH(s, names) { | |
262 | char *x; | |
263 | ||
df7c4eb6 | 264 | r = unit_name_mangle_with_suffix(*s, "as dependency", 0, ".mount", &x); |
3519d230 KZ |
265 | if (r < 0) |
266 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
33a4c983 | 267 | |
3519d230 KZ |
268 | r = strv_consume(&units, x); |
269 | if (r < 0) | |
270 | return log_oom(); | |
271 | } | |
272 | ||
273 | if (units) { | |
274 | res = strv_join(units, " "); | |
275 | if (!res) | |
276 | return log_oom(); | |
56e577c6 LP |
277 | |
278 | DISABLE_WARNING_FORMAT_NONLITERAL; | |
ae325185 | 279 | fprintf(f, format, res); |
56e577c6 | 280 | REENABLE_WARNING; |
3519d230 KZ |
281 | } |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
ae325185 | 286 | static int write_after(FILE *f, const char *opts) { |
33a4c983 | 287 | return write_dependency(f, opts, |
d6cef552 | 288 | "x-systemd.after\0", "After=%1$s\n"); |
ae325185 RB |
289 | } |
290 | ||
291 | static int write_requires_after(FILE *f, const char *opts) { | |
292 | return write_dependency(f, opts, | |
d6cef552 | 293 | "x-systemd.requires\0", "After=%1$s\nRequires=%1$s\n"); |
ae325185 RB |
294 | } |
295 | ||
296 | static int write_before(FILE *f, const char *opts) { | |
297 | return write_dependency(f, opts, | |
d6cef552 | 298 | "x-systemd.before\0", "Before=%1$s\n"); |
ae325185 RB |
299 | } |
300 | ||
3519d230 | 301 | static int write_requires_mounts_for(FILE *f, const char *opts) { |
98bad05e | 302 | _cleanup_strv_free_ char **paths = NULL, **paths_escaped = NULL; |
3519d230 KZ |
303 | _cleanup_free_ char *res = NULL; |
304 | int r; | |
305 | ||
306 | assert(f); | |
307 | assert(opts); | |
308 | ||
d6cef552 | 309 | r = fstab_filter_options(opts, "x-systemd.requires-mounts-for\0", NULL, NULL, &paths, NULL); |
3519d230 KZ |
310 | if (r < 0) |
311 | return log_warning_errno(r, "Failed to parse options: %m"); | |
312 | if (r == 0) | |
313 | return 0; | |
314 | ||
98bad05e LP |
315 | r = specifier_escape_strv(paths, &paths_escaped); |
316 | if (r < 0) | |
317 | return log_error_errno(r, "Failed to escape paths: %m"); | |
318 | ||
319 | res = strv_join(paths_escaped, " "); | |
3519d230 KZ |
320 | if (!res) |
321 | return log_oom(); | |
322 | ||
323 | fprintf(f, "RequiresMountsFor=%s\n", res); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
6371e69b FB |
328 | static int write_extra_dependencies(FILE *f, const char *opts) { |
329 | int r; | |
330 | ||
331 | assert(f); | |
332 | ||
333 | if (opts) { | |
334 | r = write_after(f, opts); | |
335 | if (r < 0) | |
336 | return r; | |
337 | r = write_requires_after(f, opts); | |
338 | if (r < 0) | |
339 | return r; | |
340 | r = write_before(f, opts); | |
341 | if (r < 0) | |
342 | return r; | |
343 | r = write_requires_mounts_for(f, opts); | |
344 | if (r < 0) | |
345 | return r; | |
346 | } | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
e8d2f6cd | 351 | static int add_mount( |
7772c177 | 352 | const char *source, |
91214a37 | 353 | const char *dest, |
e8d2f6cd LP |
354 | const char *what, |
355 | const char *where, | |
634735b5 | 356 | const char *original_where, |
6db615c1 | 357 | const char *fstype, |
e8d2f6cd LP |
358 | const char *opts, |
359 | int passno, | |
d2194e15 | 360 | MountPointFlags flags, |
da69e8e4 | 361 | const char *target_unit) { |
e48fdd84 | 362 | |
7fd1b19b | 363 | _cleanup_free_ char |
da495a03 | 364 | *name = NULL, |
fb883e75 | 365 | *automount_name = NULL, |
98bad05e LP |
366 | *filtered = NULL, |
367 | *where_escaped = NULL; | |
be02c1cf | 368 | _cleanup_strv_free_ char **wanted_by = NULL, **required_by = NULL; |
7fd1b19b | 369 | _cleanup_fclose_ FILE *f = NULL; |
94192cda | 370 | int r; |
6b1dc2bd LP |
371 | |
372 | assert(what); | |
373 | assert(where); | |
5e398e54 | 374 | assert(opts); |
da69e8e4 | 375 | assert(target_unit); |
5e398e54 | 376 | assert(source); |
6b1dc2bd | 377 | |
6db615c1 | 378 | if (streq_ptr(fstype, "autofs")) |
6b1dc2bd LP |
379 | return 0; |
380 | ||
381 | if (!is_path(where)) { | |
382 | log_warning("Mount point %s is not a valid path, ignoring.", where); | |
383 | return 0; | |
384 | } | |
385 | ||
386 | if (mount_point_is_api(where) || | |
387 | mount_point_ignore(where)) | |
388 | return 0; | |
389 | ||
028a981c ZJS |
390 | if (arg_sysroot_check) { |
391 | log_info("%s should be mounted in the initrd, will request daemon-reload.", where); | |
392 | return true; | |
393 | } | |
394 | ||
d6cef552 | 395 | r = fstab_filter_options(opts, "x-systemd.wanted-by\0", NULL, NULL, &wanted_by, NULL); |
be02c1cf AR |
396 | if (r < 0) |
397 | return r; | |
398 | ||
d6cef552 | 399 | r = fstab_filter_options(opts, "x-systemd.required-by\0", NULL, NULL, &required_by, NULL); |
be02c1cf AR |
400 | if (r < 0) |
401 | return r; | |
402 | ||
e48fdd84 | 403 | if (path_equal(where, "/")) { |
d2194e15 LP |
404 | if (flags & MOUNT_NOAUTO) |
405 | log_warning("Ignoring \"noauto\" option for root device"); | |
406 | if (flags & MOUNT_NOFAIL) | |
407 | log_warning("Ignoring \"nofail\" option for root device"); | |
408 | if (flags & MOUNT_AUTOMOUNT) | |
409 | log_warning("Ignoring \"automount\" option for root device"); | |
be02c1cf | 410 | if (!strv_isempty(wanted_by)) |
d2194e15 | 411 | log_warning("Ignoring \"x-systemd.wanted-by=\" option for root device"); |
be02c1cf | 412 | if (!strv_isempty(required_by)) |
d2194e15 | 413 | log_warning("Ignoring \"x-systemd.required-by=\" option for root device"); |
2e852276 | 414 | |
be02c1cf AR |
415 | required_by = strv_free(required_by); |
416 | wanted_by = strv_free(wanted_by); | |
d2194e15 | 417 | SET_FLAG(flags, MOUNT_NOAUTO | MOUNT_NOFAIL | MOUNT_AUTOMOUNT, false); |
e48fdd84 LP |
418 | } |
419 | ||
7410616c LP |
420 | r = unit_name_from_path(where, ".mount", &name); |
421 | if (r < 0) | |
422 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 423 | |
7772c177 | 424 | r = generator_open_unit_file(dest, source, name, &f); |
fb883e75 ZJS |
425 | if (r < 0) |
426 | return r; | |
0d536673 | 427 | |
5e398e54 | 428 | fprintf(f, |
c3834f9b | 429 | "[Unit]\n" |
a7e88558 LP |
430 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n" |
431 | "SourcePath=%s\n", | |
c3834f9b | 432 | source); |
6b1dc2bd | 433 | |
d2194e15 | 434 | if (STRPTR_IN_SET(fstype, "nfs", "nfs4") && !(flags & MOUNT_AUTOMOUNT) && |
65e1dee7 N |
435 | fstab_test_yes_no_option(opts, "bg\0" "fg\0")) { |
436 | /* The default retry timeout that mount.nfs uses for 'bg' mounts | |
437 | * is 10000 minutes, where as it uses 2 minutes for 'fg' mounts. | |
438 | * As we are making 'bg' mounts look like an 'fg' mount to | |
439 | * mount.nfs (so systemd can manage the job-control aspects of 'bg'), | |
440 | * we need to explicitly preserve that default, and also ensure | |
441 | * the systemd mount-timeout doesn't interfere. | |
5a12d1ca | 442 | * By placing these options first, they can be overridden by |
65e1dee7 | 443 | * settings in /etc/fstab. */ |
e66d2eee | 444 | opts = strjoina("x-systemd.mount-timeout=infinity,retry=10000,nofail,", opts, ",fg"); |
d2194e15 | 445 | SET_FLAG(flags, MOUNT_NOFAIL, true); |
65e1dee7 N |
446 | } |
447 | ||
6371e69b FB |
448 | r = write_extra_dependencies(f, opts); |
449 | if (r < 0) | |
450 | return r; | |
3519d230 | 451 | |
da69e8e4 | 452 | /* Order the mount unit we generate relative to target_unit, so that DefaultDependencies= on the |
fa138f5e | 453 | * target unit won't affect us. */ |
da69e8e4 ZJS |
454 | if (!FLAGS_SET(flags, MOUNT_NOFAIL)) |
455 | fprintf(f, "Before=%s\n", target_unit); | |
fa138f5e | 456 | |
e48fdd84 | 457 | if (passno != 0) { |
91214a37 | 458 | r = generator_write_fsck_deps(f, dest, what, where, fstype); |
e48fdd84 LP |
459 | if (r < 0) |
460 | return r; | |
461 | } | |
64e70e4b | 462 | |
a7e88558 LP |
463 | r = generator_write_blockdev_dependency(f, what); |
464 | if (r < 0) | |
465 | return r; | |
466 | ||
467 | fprintf(f, | |
468 | "\n" | |
469 | "[Mount]\n"); | |
470 | ||
b2efed52 ZJS |
471 | r = write_what(f, what); |
472 | if (r < 0) | |
473 | return r; | |
474 | ||
634735b5 CW |
475 | if (original_where) |
476 | fprintf(f, "# Canonicalized from %s\n", original_where); | |
98bad05e LP |
477 | |
478 | where_escaped = specifier_escape(where); | |
479 | if (!where_escaped) | |
480 | return log_oom(); | |
481 | fprintf(f, "Where=%s\n", where_escaped); | |
6db615c1 | 482 | |
98bad05e | 483 | if (!isempty(fstype) && !streq(fstype, "auto")) { |
c2b2df60 | 484 | _cleanup_free_ char *t = NULL; |
98bad05e LP |
485 | |
486 | t = specifier_escape(fstype); | |
487 | if (!t) | |
488 | return -ENOMEM; | |
489 | ||
490 | fprintf(f, "Type=%s\n", t); | |
491 | } | |
6b1dc2bd | 492 | |
91214a37 | 493 | r = generator_write_timeouts(dest, what, where, opts, &filtered); |
29686440 ZJS |
494 | if (r < 0) |
495 | return r; | |
496 | ||
4195077a MK |
497 | r = generator_write_device_deps(dest, what, where, opts); |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
110773f6 CH |
501 | r = write_mount_timeout(f, where, opts); |
502 | if (r < 0) | |
503 | return r; | |
504 | ||
d5cc4be2 LP |
505 | r = write_options(f, filtered); |
506 | if (r < 0) | |
507 | return r; | |
5e398e54 | 508 | |
d2194e15 | 509 | if (flags & MOUNT_RW_ONLY) |
f42aa416 MH |
510 | fprintf(f, "ReadWriteOnly=yes\n"); |
511 | ||
4652c56c ZJS |
512 | r = fflush_and_check(f); |
513 | if (r < 0) | |
fb883e75 | 514 | return log_error_errno(r, "Failed to write unit file %s: %m", name); |
6b1dc2bd | 515 | |
d2194e15 | 516 | if (flags & MOUNT_MAKEFS) { |
da495a03 ZJS |
517 | r = generator_hook_up_mkfs(dest, what, where, fstype); |
518 | if (r < 0) | |
519 | return r; | |
520 | } | |
521 | ||
d2194e15 | 522 | if (flags & MOUNT_GROWFS) { |
da69e8e4 | 523 | r = generator_hook_up_growfs(dest, where, target_unit); |
7f2806d5 ZJS |
524 | if (r < 0) |
525 | return r; | |
526 | } | |
527 | ||
d2194e15 LP |
528 | if (!FLAGS_SET(flags, MOUNT_AUTOMOUNT)) { |
529 | if (!FLAGS_SET(flags, MOUNT_NOAUTO) && strv_isempty(wanted_by) && strv_isempty(required_by)) { | |
da69e8e4 | 530 | r = generator_add_symlink(dest, target_unit, |
d2194e15 | 531 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", name); |
be02c1cf AR |
532 | if (r < 0) |
533 | return r; | |
534 | } else { | |
be02c1cf AR |
535 | STRV_FOREACH(s, wanted_by) { |
536 | r = generator_add_symlink(dest, *s, "wants", name); | |
537 | if (r < 0) | |
538 | return r; | |
539 | } | |
540 | ||
541 | STRV_FOREACH(s, required_by) { | |
542 | r = generator_add_symlink(dest, *s, "requires", name); | |
543 | if (r < 0) | |
544 | return r; | |
545 | } | |
546 | } | |
547 | } else { | |
7410616c LP |
548 | r = unit_name_from_path(where, ".automount", &automount_name); |
549 | if (r < 0) | |
550 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
6b1dc2bd | 551 | |
8a7033ac | 552 | f = safe_fclose(f); |
6b1dc2bd | 553 | |
7772c177 | 554 | r = generator_open_unit_file(dest, source, automount_name, &f); |
fb883e75 ZJS |
555 | if (r < 0) |
556 | return r; | |
0d536673 | 557 | |
6b1dc2bd | 558 | fprintf(f, |
6b1dc2bd | 559 | "[Unit]\n" |
c3834f9b LP |
560 | "SourcePath=%s\n" |
561 | "Documentation=man:fstab(5) man:systemd-fstab-generator(8)\n", | |
700e07ff HH |
562 | source); |
563 | ||
700e07ff | 564 | fprintf(f, |
bd10a84b | 565 | "\n" |
6b1dc2bd LP |
566 | "[Automount]\n" |
567 | "Where=%s\n", | |
98bad05e | 568 | where_escaped); |
6b1dc2bd | 569 | |
336b5c61 | 570 | r = write_idle_timeout(f, where, opts); |
deb0a77c MO |
571 | if (r < 0) |
572 | return r; | |
573 | ||
4652c56c ZJS |
574 | r = fflush_and_check(f); |
575 | if (r < 0) | |
fb883e75 | 576 | return log_error_errno(r, "Failed to write unit file %s: %m", automount_name); |
6b1dc2bd | 577 | |
da69e8e4 | 578 | r = generator_add_symlink(dest, target_unit, |
d2194e15 | 579 | (flags & MOUNT_NOFAIL) ? "wants" : "requires", automount_name); |
630d30d3 ZJS |
580 | if (r < 0) |
581 | return r; | |
6b1dc2bd LP |
582 | } |
583 | ||
028a981c ZJS |
584 | return true; |
585 | } | |
586 | ||
587 | static int do_daemon_reload(void) { | |
588 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; | |
589 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
590 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
591 | int r, k; | |
592 | ||
593 | log_debug("Calling org.freedesktop.systemd1.Manager.Reload()..."); | |
594 | ||
595 | r = bus_connect_system_systemd(&bus); | |
596 | if (r < 0) | |
597 | return log_error_errno(r, "Failed to get D-Bus connection: %m"); | |
598 | ||
599 | r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "Reload"); | |
600 | if (r < 0) | |
601 | return bus_log_create_error(r); | |
602 | ||
603 | r = sd_bus_call(bus, m, DAEMON_RELOAD_TIMEOUT_SEC, &error, NULL); | |
604 | if (r < 0) | |
605 | return log_error_errno(r, "Failed to reload daemon: %s", bus_error_message(&error, r)); | |
606 | ||
607 | /* We need to requeue the two targets so that any new units which previously were not part of the | |
608 | * targets, and which we now added, will be started. */ | |
609 | ||
610 | r = 0; | |
611 | FOREACH_STRING(unit, SPECIAL_INITRD_FS_TARGET, SPECIAL_SWAP_TARGET) { | |
612 | log_info("Requesting %s/start/replace...", unit); | |
613 | ||
614 | k = sd_bus_call_method(bus, | |
615 | "org.freedesktop.systemd1", | |
616 | "/org/freedesktop/systemd1", | |
617 | "org.freedesktop.systemd1.Manager", | |
618 | "StartUnit", | |
619 | &error, | |
620 | NULL, | |
621 | "ss", unit, "replace"); | |
622 | if (k < 0) { | |
623 | log_error_errno(k, "Failed to (re)start %s: %s", unit, bus_error_message(&error, r)); | |
624 | if (r == 0) | |
625 | r = k; | |
626 | } | |
627 | } | |
628 | ||
629 | return r; | |
6b1dc2bd LP |
630 | } |
631 | ||
99e3d476 ZJS |
632 | static const char* sysroot_fstab_path(void) { |
633 | return getenv("SYSTEMD_SYSROOT_FSTAB") ?: "/sysroot/etc/fstab"; | |
634 | } | |
635 | ||
e48fdd84 | 636 | static int parse_fstab(bool initrd) { |
6db615c1 | 637 | _cleanup_endmntent_ FILE *f = NULL; |
ed4ad488 | 638 | const char *fstab; |
6b1dc2bd | 639 | struct mntent *me; |
e48fdd84 | 640 | int r = 0; |
6b1dc2bd | 641 | |
99e3d476 ZJS |
642 | if (initrd) |
643 | fstab = sysroot_fstab_path(); | |
028a981c | 644 | else { |
99e3d476 | 645 | fstab = fstab_path(); |
028a981c ZJS |
646 | assert(!arg_sysroot_check); |
647 | } | |
99e3d476 | 648 | |
ed4ad488 | 649 | log_debug("Parsing %s...", fstab); |
01a0f7d0 | 650 | |
ed4ad488 | 651 | f = setmntent(fstab, "re"); |
6b1dc2bd LP |
652 | if (!f) { |
653 | if (errno == ENOENT) | |
654 | return 0; | |
655 | ||
ed4ad488 | 656 | return log_error_errno(errno, "Failed to open %s: %m", fstab); |
6b1dc2bd LP |
657 | } |
658 | ||
659 | while ((me = getmntent(f))) { | |
634735b5 | 660 | _cleanup_free_ char *where = NULL, *what = NULL, *canonical_where = NULL; |
d2194e15 LP |
661 | bool makefs, growfs, noauto, nofail; |
662 | MountPointFlags flags; | |
6b1dc2bd LP |
663 | int k; |
664 | ||
3d22d1ab TG |
665 | if (initrd && !mount_in_initrd(me)) |
666 | continue; | |
667 | ||
6b1dc2bd | 668 | what = fstab_node_to_udev_node(me->mnt_fsname); |
e48fdd84 LP |
669 | if (!what) |
670 | return log_oom(); | |
671 | ||
18f0eaaf YW |
672 | if (path_is_read_only_fs("/sys") > 0) { |
673 | if (streq(what, "sysfs")) { | |
c41fff1e | 674 | log_info("/sys/ is read-only (running in a container?), ignoring fstab entry for %s.", me->mnt_dir); |
18f0eaaf YW |
675 | continue; |
676 | } | |
677 | ||
678 | if (is_device_path(what)) { | |
c41fff1e | 679 | log_info("/sys/ is read-only (running in a container?), ignoring fstab device entry for %s.", what); |
18f0eaaf YW |
680 | continue; |
681 | } | |
689aede8 LP |
682 | } |
683 | ||
98eda38a | 684 | where = strdup(me->mnt_dir); |
e48fdd84 | 685 | if (!where) |
5862d652 | 686 | return log_oom(); |
6b1dc2bd | 687 | |
634735b5 | 688 | if (is_path(where)) { |
4ff361cc | 689 | path_simplify(where); |
f1a2c758 | 690 | |
634735b5 CW |
691 | /* Follow symlinks here; see 5261ba901845c084de5a8fd06500ed09bfb0bd80 which makes sense for |
692 | * mount units, but causes problems since it historically worked to have symlinks in e.g. | |
693 | * /etc/fstab. So we canonicalize here. Note that we use CHASE_NONEXISTENT to handle the case | |
694 | * where a symlink refers to another mount target; this works assuming the sub-mountpoint | |
ff52ff25 ZJS |
695 | * target is the final directory. |
696 | * | |
697 | * FIXME: when chase_symlinks() learns to chase non-existent paths, use this here and | |
698 | * drop the prefixing with /sysroot on error below. | |
699 | */ | |
1677b88d | 700 | k = chase_symlinks(where, initrd ? "/sysroot" : NULL, |
634735b5 | 701 | CHASE_PREFIX_ROOT | CHASE_NONEXISTENT, |
a5648b80 | 702 | &canonical_where, NULL); |
ff52ff25 ZJS |
703 | if (k < 0) { |
704 | /* If we can't canonicalize, continue as if it wasn't a symlink */ | |
705 | log_debug_errno(k, "Failed to read symlink target for %s, using as-is: %m", where); | |
706 | ||
707 | if (initrd) { | |
708 | canonical_where = path_join("/sysroot", where); | |
709 | if (!canonical_where) | |
710 | return log_oom(); | |
711 | } | |
712 | ||
713 | } else if (streq(canonical_where, where)) /* If it was fully canonicalized, suppress the change */ | |
f1a2c758 LP |
714 | canonical_where = mfree(canonical_where); |
715 | else | |
716 | log_debug("Canonicalized what=%s where=%s to %s", what, where, canonical_where); | |
634735b5 | 717 | } |
6b1dc2bd | 718 | |
da495a03 | 719 | makefs = fstab_test_option(me->mnt_opts, "x-systemd.makefs\0"); |
7f2806d5 | 720 | growfs = fstab_test_option(me->mnt_opts, "x-systemd.growfs\0"); |
b9f111b9 ZJS |
721 | noauto = fstab_test_yes_no_option(me->mnt_opts, "noauto\0" "auto\0"); |
722 | nofail = fstab_test_yes_no_option(me->mnt_opts, "nofail\0" "fail\0"); | |
f1a2c758 | 723 | |
ac1d4c79 | 724 | log_debug("Found entry what=%s where=%s type=%s makefs=%s growfs=%s noauto=%s nofail=%s", |
5607d856 | 725 | what, where, me->mnt_type, |
ac1d4c79 | 726 | yes_no(makefs), yes_no(growfs), |
5607d856 | 727 | yes_no(noauto), yes_no(nofail)); |
6b1dc2bd | 728 | |
d2194e15 LP |
729 | flags = makefs * MOUNT_MAKEFS | |
730 | growfs * MOUNT_GROWFS | | |
731 | noauto * MOUNT_NOAUTO | | |
732 | nofail * MOUNT_NOFAIL; | |
733 | ||
6b1dc2bd | 734 | if (streq(me->mnt_type, "swap")) |
7772c177 | 735 | k = add_swap(fstab, what, me, flags); |
5e398e54 | 736 | else { |
d2194e15 | 737 | bool rw_only, automount; |
5e398e54 | 738 | |
d2194e15 | 739 | rw_only = fstab_test_option(me->mnt_opts, "x-systemd.rw-only\0"); |
b9f111b9 ZJS |
740 | automount = fstab_test_option(me->mnt_opts, |
741 | "comment=systemd.automount\0" | |
742 | "x-systemd.automount\0"); | |
d2194e15 LP |
743 | |
744 | flags |= rw_only * MOUNT_RW_ONLY | | |
745 | automount * MOUNT_AUTOMOUNT; | |
746 | ||
da69e8e4 ZJS |
747 | const char *target_unit = |
748 | initrd ? SPECIAL_INITRD_FS_TARGET : | |
749 | mount_is_network(me) ? SPECIAL_REMOTE_FS_TARGET : | |
750 | SPECIAL_LOCAL_FS_TARGET; | |
5e398e54 | 751 | |
7772c177 ZJS |
752 | k = add_mount(fstab, |
753 | arg_dest, | |
91214a37 | 754 | what, |
634735b5 CW |
755 | canonical_where ?: where, |
756 | canonical_where ? where: NULL, | |
6db615c1 LP |
757 | me->mnt_type, |
758 | me->mnt_opts, | |
759 | me->mnt_passno, | |
d2194e15 | 760 | flags, |
da69e8e4 | 761 | target_unit); |
5e398e54 | 762 | } |
6b1dc2bd | 763 | |
028a981c ZJS |
764 | if (arg_sysroot_check && k > 0) |
765 | return true; /* We found a mount or swap that would be started… */ | |
7f2806d5 | 766 | if (r >= 0 && k < 0) |
6b1dc2bd LP |
767 | r = k; |
768 | } | |
769 | ||
6b1dc2bd LP |
770 | return r; |
771 | } | |
772 | ||
77b8e92d YW |
773 | static int sysroot_is_nfsroot(void) { |
774 | union in_addr_union u; | |
775 | const char *sep, *a; | |
776 | int r; | |
777 | ||
778 | assert(arg_root_what); | |
779 | ||
780 | /* From dracut.cmdline(7). | |
781 | * | |
782 | * root=[<server-ip>:]<root-dir>[:<nfs-options>] | |
783 | * root=nfs:[<server-ip>:]<root-dir>[:<nfs-options>], | |
784 | * root=nfs4:[<server-ip>:]<root-dir>[:<nfs-options>], | |
785 | * root={dhcp|dhcp6} | |
786 | * | |
787 | * mount nfs share from <server-ip>:/<root-dir>, if no server-ip is given, use dhcp next_server. | |
788 | * If server-ip is an IPv6 address it has to be put in brackets, e.g. [2001:DB8::1]. NFS options | |
789 | * can be appended with the prefix ":" or "," and are separated by ",". */ | |
790 | ||
791 | if (path_equal(arg_root_what, "/dev/nfs") || | |
792 | STR_IN_SET(arg_root_what, "dhcp", "dhcp6") || | |
793 | STARTSWITH_SET(arg_root_what, "nfs:", "nfs4:")) | |
794 | return true; | |
795 | ||
796 | /* IPv6 address */ | |
797 | if (arg_root_what[0] == '[') { | |
798 | sep = strchr(arg_root_what + 1, ']'); | |
799 | if (!sep) | |
800 | return -EINVAL; | |
801 | ||
ea1c9d3f | 802 | a = strndupa_safe(arg_root_what + 1, sep - arg_root_what - 1); |
77b8e92d YW |
803 | |
804 | r = in_addr_from_string(AF_INET6, a, &u); | |
805 | if (r < 0) | |
806 | return r; | |
807 | ||
808 | return true; | |
809 | } | |
810 | ||
811 | /* IPv4 address */ | |
812 | sep = strchr(arg_root_what, ':'); | |
813 | if (sep) { | |
ea1c9d3f | 814 | a = strndupa_safe(arg_root_what, sep - arg_root_what); |
77b8e92d YW |
815 | |
816 | if (in_addr_from_string(AF_INET, a, &u) >= 0) | |
817 | return true; | |
818 | } | |
819 | ||
820 | /* root directory without address */ | |
821 | return path_is_absolute(arg_root_what) && !path_startswith(arg_root_what, "/dev"); | |
822 | } | |
823 | ||
2e852276 | 824 | static int add_sysroot_mount(void) { |
75a59316 | 825 | _cleanup_free_ char *what = NULL; |
725ad3b0 | 826 | const char *opts, *fstype; |
01fdfbb8 WF |
827 | bool default_rw, makefs; |
828 | MountPointFlags flags; | |
7163e1ca | 829 | int r; |
5e398e54 | 830 | |
093c2cfe TH |
831 | if (isempty(arg_root_what)) { |
832 | log_debug("Could not find a root= entry on the kernel command line."); | |
833 | return 0; | |
135b5212 | 834 | } |
5e398e54 | 835 | |
138f4c69 | 836 | if (streq(arg_root_what, "gpt-auto")) { |
4981427c | 837 | /* This is handled by gpt-auto-generator */ |
138f4c69 LP |
838 | log_debug("Skipping root directory handling, as gpt-auto was requested."); |
839 | return 0; | |
840 | } | |
841 | ||
77b8e92d YW |
842 | r = sysroot_is_nfsroot(); |
843 | if (r < 0) | |
844 | log_debug_errno(r, "Failed to determine if the root directory is on NFS, assuming not: %m"); | |
845 | else if (r > 0) { | |
3ade16c9 | 846 | /* This is handled by the kernel or the initrd */ |
77b8e92d | 847 | log_debug("Skipping root directory handling, as root on NFS was requested."); |
155e1bb4 YW |
848 | return 0; |
849 | } | |
850 | ||
851 | if (startswith(arg_root_what, "cifs://")) { | |
852 | log_debug("Skipping root directory handling, as root on CIFS was requested."); | |
853 | return 0; | |
854 | } | |
855 | ||
856 | if (startswith(arg_root_what, "iscsi:")) { | |
857 | log_debug("Skipping root directory handling, as root on iSCSI was requested."); | |
858 | return 0; | |
859 | } | |
860 | ||
861 | if (startswith(arg_root_what, "live:")) { | |
862 | log_debug("Skipping root directory handling, as root on live image was requested."); | |
3ade16c9 HH |
863 | return 0; |
864 | } | |
865 | ||
725ad3b0 LP |
866 | if (streq(arg_root_what, "tmpfs")) { |
867 | /* If root=tmpfs is specified, then take this as shortcut for a writable tmpfs mount as root */ | |
868 | ||
869 | what = strdup("rootfs"); /* just a pretty name, to show up in /proc/self/mountinfo */ | |
870 | if (!what) | |
871 | return log_oom(); | |
872 | ||
5a12d1ca | 873 | fstype = arg_root_fstype ?: "tmpfs"; /* tmpfs, unless overridden */ |
725ad3b0 | 874 | |
5a12d1ca | 875 | default_rw = true; /* writable, unless overridden */; |
725ad3b0 LP |
876 | } else { |
877 | ||
878 | what = fstab_node_to_udev_node(arg_root_what); | |
879 | if (!what) | |
880 | return log_oom(); | |
881 | ||
882 | fstype = arg_root_fstype; /* if not specified explicitly, don't default to anything here */ | |
883 | ||
5a12d1ca | 884 | default_rw = false; /* read-only, unless overridden */ |
725ad3b0 | 885 | } |
093c2cfe | 886 | |
6db615c1 | 887 | if (!arg_root_options) |
725ad3b0 | 888 | opts = arg_root_rw > 0 || (arg_root_rw < 0 && default_rw) ? "rw" : "ro"; |
75a59316 | 889 | else if (arg_root_rw >= 0 || |
d15d0333 | 890 | !fstab_test_option(arg_root_options, "ro\0" "rw\0")) |
63c372cb | 891 | opts = strjoina(arg_root_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
75a59316 ZJS |
892 | else |
893 | opts = arg_root_options; | |
5e398e54 | 894 | |
e19ae92a | 895 | log_debug("Found entry what=%s where=/sysroot type=%s opts=%s", what, strna(arg_root_fstype), strempty(opts)); |
7163e1ca DD |
896 | |
897 | if (is_device_path(what)) { | |
898 | r = generator_write_initrd_root_device_deps(arg_dest, what); | |
899 | if (r < 0) | |
900 | return r; | |
901 | } | |
902 | ||
01fdfbb8 WF |
903 | makefs = fstab_test_option(opts, "x-systemd.makefs\0"); |
904 | flags = makefs * MOUNT_MAKEFS; | |
905 | ||
7772c177 ZJS |
906 | return add_mount("/proc/cmdline", |
907 | arg_dest, | |
91214a37 | 908 | what, |
6db615c1 | 909 | "/sysroot", |
634735b5 | 910 | NULL, |
725ad3b0 | 911 | fstype, |
75a59316 | 912 | opts, |
f113f8e3 | 913 | is_device_path(what) ? 1 : 0, /* passno */ |
01fdfbb8 | 914 | flags, /* makefs, growfs off, noauto off, nofail off, automount off */ |
7772c177 | 915 | SPECIAL_INITRD_ROOT_FS_TARGET); |
5e398e54 TG |
916 | } |
917 | ||
2e852276 | 918 | static int add_sysroot_usr_mount(void) { |
9f103625 TH |
919 | _cleanup_free_ char *what = NULL; |
920 | const char *opts; | |
01fdfbb8 WF |
921 | bool makefs; |
922 | MountPointFlags flags; | |
29a24ab2 LP |
923 | int r; |
924 | ||
925 | /* Returns 0 if we didn't do anything, > 0 if we either generated a unit for the /usr/ mount, or we | |
926 | * know for sure something else did */ | |
9f103625 TH |
927 | |
928 | if (!arg_usr_what && !arg_usr_fstype && !arg_usr_options) | |
929 | return 0; | |
930 | ||
931 | if (arg_root_what && !arg_usr_what) { | |
40472036 | 932 | /* Copy over the root device, in case the /usr mount just differs in a mount option (consider btrfs subvolumes) */ |
9f103625 | 933 | arg_usr_what = strdup(arg_root_what); |
9f103625 TH |
934 | if (!arg_usr_what) |
935 | return log_oom(); | |
936 | } | |
937 | ||
938 | if (arg_root_fstype && !arg_usr_fstype) { | |
939 | arg_usr_fstype = strdup(arg_root_fstype); | |
9f103625 TH |
940 | if (!arg_usr_fstype) |
941 | return log_oom(); | |
942 | } | |
943 | ||
944 | if (arg_root_options && !arg_usr_options) { | |
945 | arg_usr_options = strdup(arg_root_options); | |
9f103625 TH |
946 | if (!arg_usr_options) |
947 | return log_oom(); | |
948 | } | |
949 | ||
29a24ab2 LP |
950 | if (isempty(arg_usr_what)) { |
951 | log_debug("Could not find a usr= entry on the kernel command line."); | |
9f103625 | 952 | return 0; |
29a24ab2 LP |
953 | } |
954 | ||
955 | if (streq(arg_usr_what, "gpt-auto")) { | |
956 | /* This is handled by the gpt-auto generator */ | |
957 | log_debug("Skipping /usr/ directory handling, as gpt-auto was requested."); | |
958 | return 1; /* systemd-gpt-auto-generator will generate a unit for this, hence report that a | |
959 | * unit file is being created for the host /usr/ mount. */ | |
960 | } | |
961 | ||
962 | if (path_equal(arg_usr_what, "/dev/nfs")) { | |
963 | /* This is handled by the initrd (if at all supported, that is) */ | |
964 | log_debug("Skipping /usr/ directory handling, as /dev/nfs was requested."); | |
965 | return 1; /* As above, report that NFS code will create the unit */ | |
966 | } | |
9f103625 TH |
967 | |
968 | what = fstab_node_to_udev_node(arg_usr_what); | |
47be5f07 LP |
969 | if (!what) |
970 | return log_oom(); | |
9f103625 | 971 | |
eb580002 MM |
972 | if (!arg_usr_options) |
973 | opts = arg_root_rw > 0 ? "rw" : "ro"; | |
d15d0333 | 974 | else if (!fstab_test_option(arg_usr_options, "ro\0" "rw\0")) |
63c372cb | 975 | opts = strjoina(arg_usr_options, ",", arg_root_rw > 0 ? "rw" : "ro"); |
eb580002 MM |
976 | else |
977 | opts = arg_usr_options; | |
9f103625 | 978 | |
29a24ab2 LP |
979 | /* When mounting /usr from the initrd, we add an extra level of indirection: we first mount the /usr/ |
980 | * partition to /sysusr/usr/, and then afterwards bind mount that to /sysroot/usr/. We do this so | |
981 | * that we can cover for systems that initially only have a /usr/ around and where the root fs needs | |
982 | * to be synthesized, based on configuration included in /usr/, e.g. systemd-repart. Software like | |
983 | * this should order itself after initrd-usr-fs.target and before initrd-fs.target; and it should | |
984 | * look into both /sysusr/ and /sysroot/ for the configuration data to apply. */ | |
985 | ||
986 | log_debug("Found entry what=%s where=/sysusr/usr type=%s opts=%s", what, strna(arg_usr_fstype), strempty(opts)); | |
987 | ||
01fdfbb8 WF |
988 | makefs = fstab_test_option(opts, "x-systemd.makefs\0"); |
989 | flags = makefs * MOUNT_MAKEFS; | |
990 | ||
7772c177 ZJS |
991 | r = add_mount("/proc/cmdline", |
992 | arg_dest, | |
29a24ab2 LP |
993 | what, |
994 | "/sysusr/usr", | |
995 | NULL, | |
996 | arg_usr_fstype, | |
997 | opts, | |
998 | is_device_path(what) ? 1 : 0, /* passno */ | |
01fdfbb8 | 999 | flags, |
7772c177 | 1000 | SPECIAL_INITRD_USR_FS_TARGET); |
29a24ab2 LP |
1001 | if (r < 0) |
1002 | return r; | |
1003 | ||
1004 | log_debug("Synthesizing entry what=/sysusr/usr where=/sysrootr/usr opts=bind"); | |
1005 | ||
7772c177 ZJS |
1006 | r = add_mount("/proc/cmdline", |
1007 | arg_dest, | |
29a24ab2 LP |
1008 | "/sysusr/usr", |
1009 | "/sysroot/usr", | |
1010 | NULL, | |
1011 | NULL, | |
1012 | "bind", | |
1013 | 0, | |
1014 | 0, | |
7772c177 | 1015 | SPECIAL_INITRD_FS_TARGET); |
29a24ab2 LP |
1016 | if (r < 0) |
1017 | return r; | |
1018 | ||
1019 | return 1; | |
1020 | } | |
1021 | ||
1022 | static int add_sysroot_usr_mount_or_fallback(void) { | |
1023 | int r; | |
1024 | ||
1025 | r = add_sysroot_usr_mount(); | |
1026 | if (r != 0) | |
1027 | return r; | |
1028 | ||
1029 | /* OK, so we didn't write anything out for /sysusr/usr/ nor /sysroot/usr/. In this case, let's make | |
1030 | * sure that initrd-usr-fs.target is at least ordered after sysroot.mount so that services that order | |
1031 | * themselves get the guarantee that /usr/ is definitely mounted somewhere. */ | |
1032 | ||
1033 | return generator_add_symlink( | |
1034 | arg_dest, | |
1035 | SPECIAL_INITRD_USR_FS_TARGET, | |
1036 | "requires", | |
1037 | "sysroot.mount"); | |
9f103625 TH |
1038 | } |
1039 | ||
91214a37 | 1040 | static int add_volatile_root(void) { |
1de7f825 | 1041 | |
91214a37 | 1042 | /* Let's add in systemd-remount-volatile.service which will remount the root device to tmpfs if this is |
1de7f825 | 1043 | * requested (or as an overlayfs), leaving only /usr from the root mount inside. */ |
91214a37 | 1044 | |
1de7f825 | 1045 | if (!IN_SET(arg_volatile_mode, VOLATILE_YES, VOLATILE_OVERLAY)) |
00bb366d | 1046 | return 0; |
91214a37 | 1047 | |
00bb366d | 1048 | return generator_add_symlink(arg_dest, SPECIAL_INITRD_ROOT_FS_TARGET, "requires", |
835cf75a | 1049 | SYSTEM_DATA_UNIT_DIR "/" SPECIAL_VOLATILE_ROOT_SERVICE); |
91214a37 LP |
1050 | } |
1051 | ||
1052 | static int add_volatile_var(void) { | |
1053 | ||
1054 | if (arg_volatile_mode != VOLATILE_STATE) | |
1055 | return 0; | |
1056 | ||
1057 | /* If requested, mount /var as tmpfs, but do so only if there's nothing else defined for this. */ | |
1058 | ||
7772c177 ZJS |
1059 | return add_mount("/proc/cmdline", |
1060 | arg_dest_late, | |
91214a37 LP |
1061 | "tmpfs", |
1062 | "/var", | |
634735b5 | 1063 | NULL, |
91214a37 | 1064 | "tmpfs", |
7d85383e | 1065 | "mode=0755" TMPFS_LIMITS_VAR, |
91214a37 | 1066 | 0, |
4191418b | 1067 | 0, |
7772c177 | 1068 | SPECIAL_LOCAL_FS_TARGET); |
91214a37 LP |
1069 | } |
1070 | ||
96287a49 | 1071 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
74df0fca | 1072 | int r; |
94734142 | 1073 | |
9f103625 TH |
1074 | /* root=, usr=, usrfstype= and roofstype= may occur more than once, the last |
1075 | * instance should take precedence. In the case of multiple rootflags= | |
1076 | * or usrflags= the arguments should be concatenated */ | |
6db615c1 | 1077 | |
1d84ad94 | 1078 | if (STR_IN_SET(key, "fstab", "rd.fstab")) { |
e48fdd84 | 1079 | |
1d84ad94 | 1080 | r = value ? parse_boolean(value) : 1; |
141a79f4 | 1081 | if (r < 0) |
059cb385 | 1082 | log_warning("Failed to parse fstab switch %s. Ignoring.", value); |
141a79f4 | 1083 | else |
e48fdd84 | 1084 | arg_fstab_enabled = r; |
94734142 | 1085 | |
1d84ad94 LP |
1086 | } else if (streq(key, "root")) { |
1087 | ||
1088 | if (proc_cmdline_value_missing(key, value)) | |
1089 | return 0; | |
6db615c1 | 1090 | |
b3f9c17a | 1091 | return free_and_strdup_warn(&arg_root_what, value); |
6db615c1 | 1092 | |
1d84ad94 LP |
1093 | } else if (streq(key, "rootfstype")) { |
1094 | ||
1095 | if (proc_cmdline_value_missing(key, value)) | |
1096 | return 0; | |
6db615c1 | 1097 | |
b3f9c17a | 1098 | return free_and_strdup_warn(&arg_root_fstype, value); |
6db615c1 | 1099 | |
1d84ad94 | 1100 | } else if (streq(key, "rootflags")) { |
6db615c1 | 1101 | |
1d84ad94 LP |
1102 | if (proc_cmdline_value_missing(key, value)) |
1103 | return 0; | |
1104 | ||
c2bc710b | 1105 | if (!strextend_with_separator(&arg_root_options, ",", value)) |
6db615c1 LP |
1106 | return log_oom(); |
1107 | ||
2f3dfc6f LP |
1108 | } else if (streq(key, "roothash")) { |
1109 | ||
1110 | if (proc_cmdline_value_missing(key, value)) | |
1111 | return 0; | |
1112 | ||
b3f9c17a | 1113 | return free_and_strdup_warn(&arg_root_hash, value); |
6db615c1 | 1114 | |
1d84ad94 LP |
1115 | } else if (streq(key, "mount.usr")) { |
1116 | ||
1117 | if (proc_cmdline_value_missing(key, value)) | |
1118 | return 0; | |
9f103625 | 1119 | |
b3f9c17a | 1120 | return free_and_strdup_warn(&arg_usr_what, value); |
9f103625 | 1121 | |
1d84ad94 LP |
1122 | } else if (streq(key, "mount.usrfstype")) { |
1123 | ||
1124 | if (proc_cmdline_value_missing(key, value)) | |
1125 | return 0; | |
9f103625 | 1126 | |
b3f9c17a | 1127 | return free_and_strdup_warn(&arg_usr_fstype, value); |
9f103625 | 1128 | |
1d84ad94 | 1129 | } else if (streq(key, "mount.usrflags")) { |
9f103625 | 1130 | |
1d84ad94 LP |
1131 | if (proc_cmdline_value_missing(key, value)) |
1132 | return 0; | |
1133 | ||
c2bc710b | 1134 | if (!strextend_with_separator(&arg_usr_options, ",", value)) |
9f103625 TH |
1135 | return log_oom(); |
1136 | ||
c1b9e3df MB |
1137 | } else if (streq(key, "usrhash")) { |
1138 | ||
1139 | if (proc_cmdline_value_missing(key, value)) | |
1140 | return 0; | |
1141 | ||
1142 | return free_and_strdup_warn(&arg_usr_hash, value); | |
1143 | ||
6db615c1 LP |
1144 | } else if (streq(key, "rw") && !value) |
1145 | arg_root_rw = true; | |
1146 | else if (streq(key, "ro") && !value) | |
1147 | arg_root_rw = false; | |
91214a37 LP |
1148 | else if (streq(key, "systemd.volatile")) { |
1149 | VolatileMode m; | |
1150 | ||
1151 | if (value) { | |
1152 | m = volatile_mode_from_string(value); | |
1153 | if (m < 0) | |
7211c853 | 1154 | log_warning_errno(m, "Failed to parse systemd.volatile= argument: %s", value); |
91214a37 LP |
1155 | else |
1156 | arg_volatile_mode = m; | |
1157 | } else | |
1158 | arg_volatile_mode = VOLATILE_YES; | |
567a5307 | 1159 | |
1160 | } else if (streq(key, "systemd.swap")) { | |
1161 | ||
1162 | r = value ? parse_boolean(value) : 1; | |
1163 | if (r < 0) | |
1164 | log_warning("Failed to parse systemd.swap switch %s. Ignoring.", value); | |
1165 | else | |
1166 | arg_swap_enabled = r; | |
91214a37 | 1167 | } |
94734142 | 1168 | |
d0aa9ce5 | 1169 | return 0; |
94734142 LP |
1170 | } |
1171 | ||
c1b9e3df | 1172 | static int determine_device(char **what, const char *hash, const char *name) { |
2f3dfc6f | 1173 | |
c1b9e3df MB |
1174 | assert(what); |
1175 | assert(name); | |
1176 | ||
1177 | /* If we have a hash but no device then Verity is used, and we use the DM device. */ | |
1178 | if (*what) | |
2f3dfc6f LP |
1179 | return 0; |
1180 | ||
c1b9e3df | 1181 | if (!hash) |
2f3dfc6f LP |
1182 | return 0; |
1183 | ||
c1b9e3df MB |
1184 | *what = path_join("/dev/mapper/", name); |
1185 | if (!*what) | |
2f3dfc6f LP |
1186 | return log_oom(); |
1187 | ||
c1b9e3df | 1188 | log_info("Using verity %s device %s.", name, *what); |
2f3dfc6f LP |
1189 | |
1190 | return 1; | |
1191 | } | |
1192 | ||
c1b9e3df MB |
1193 | static int determine_root(void) { |
1194 | return determine_device(&arg_root_what, arg_root_hash, "root"); | |
1195 | } | |
1196 | ||
1197 | static int determine_usr(void) { | |
1198 | return determine_device(&arg_usr_what, arg_usr_hash, "usr"); | |
1199 | } | |
1200 | ||
028a981c ZJS |
1201 | /* If arg_sysroot_check is false, run as generator in the usual fashion. |
1202 | * If it is true, check /sysroot/etc/fstab for any units that we'd want to mount | |
1203 | * in the initrd, and call daemon-reload. We will get reinvoked as a generator, | |
1204 | * with /sysroot/etc/fstab available, and then we can write additional units based | |
1205 | * on that file. */ | |
1206 | static int run_generator(void) { | |
2572957e | 1207 | int r, r2 = 0, r3 = 0; |
6b1dc2bd | 1208 | |
1d84ad94 | 1209 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 1210 | if (r < 0) |
da927ba9 | 1211 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
94734142 | 1212 | |
2f3dfc6f | 1213 | (void) determine_root(); |
c1b9e3df | 1214 | (void) determine_usr(); |
2f3dfc6f | 1215 | |
028a981c ZJS |
1216 | if (arg_sysroot_check) { |
1217 | r = parse_fstab(true); | |
1218 | if (r == 0) | |
1219 | log_debug("Nothing interesting found, not doing daemon-reload."); | |
1220 | if (r > 0) | |
1221 | r = do_daemon_reload(); | |
1222 | return r; | |
1223 | } | |
1224 | ||
9f103625 TH |
1225 | /* Always honour root= and usr= in the kernel command line if we are in an initrd */ |
1226 | if (in_initrd()) { | |
2e852276 | 1227 | r = add_sysroot_mount(); |
003cba39 | 1228 | |
29a24ab2 | 1229 | r2 = add_sysroot_usr_mount_or_fallback(); |
91214a37 | 1230 | |
2572957e | 1231 | r3 = add_volatile_root(); |
003cba39 | 1232 | } else |
91214a37 | 1233 | r = add_volatile_var(); |
5e398e54 | 1234 | |
e48fdd84 LP |
1235 | /* Honour /etc/fstab only when that's enabled */ |
1236 | if (arg_fstab_enabled) { | |
e48fdd84 | 1237 | /* Parse the local /etc/fstab, possibly from the initrd */ |
2572957e | 1238 | r2 = parse_fstab(false); |
ac4785b0 | 1239 | |
e48fdd84 | 1240 | /* If running in the initrd also parse the /etc/fstab from the host */ |
2572957e ZJS |
1241 | if (in_initrd()) |
1242 | r3 = parse_fstab(true); | |
9b69569d ZJS |
1243 | else |
1244 | r3 = generator_enable_remount_fs_service(arg_dest); | |
e48fdd84 | 1245 | } |
6b1dc2bd | 1246 | |
2572957e | 1247 | return r < 0 ? r : r2 < 0 ? r2 : r3; |
6b1dc2bd | 1248 | } |
a4ef3e4d | 1249 | |
028a981c ZJS |
1250 | static int run(int argc, char **argv) { |
1251 | arg_sysroot_check = invoked_as(argv, "systemd-sysroot-fstab-check"); | |
1252 | ||
1253 | if (arg_sysroot_check) { | |
1254 | /* Run as in systemd-sysroot-fstab-check mode */ | |
1255 | log_setup(); | |
1256 | ||
1257 | if (strv_length(argv) > 1) | |
1258 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1259 | "This program takes no arguments."); | |
1260 | if (!in_initrd()) | |
1261 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1262 | "This program is only useful in the initrd."); | |
1263 | } else { | |
1264 | /* Run in generator mode */ | |
1265 | log_setup_generator(); | |
1266 | ||
1267 | if (!IN_SET(strv_length(argv), 2, 4)) | |
1268 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
1269 | "This program takes one or three arguments."); | |
1270 | ||
1271 | arg_dest = ASSERT_PTR(argv[1]); | |
1272 | arg_dest_late = ASSERT_PTR(argv[argc > 3 ? 3 : 1]); | |
1273 | } | |
1274 | ||
1275 | return run_generator(); | |
1276 | } | |
1277 | ||
1278 | DEFINE_MAIN_FUNCTION(run); |