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3d20ed6d LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
f1f0198c | 7 | Copyright 2014 Holger Hans Peter Freyther |
3d20ed6d LP |
8 | |
9 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
10 | under the terms of the GNU Lesser General Public License as published by |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
3d20ed6d LP |
12 | (at your option) any later version. |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 17 | Lesser General Public License for more details. |
3d20ed6d | 18 | |
5430f7f2 | 19 | You should have received a copy of the GNU Lesser General Public License |
3d20ed6d LP |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
21 | ***/ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <stdbool.h> | |
3d20ed6d LP |
25 | #include <errno.h> |
26 | #include <unistd.h> | |
a84f5192 | 27 | #include <fcntl.h> |
27d340c7 | 28 | #include <sys/file.h> |
ac6e2f0d | 29 | #include <sys/stat.h> |
96d9117a | 30 | #include <sys/prctl.h> |
3d20ed6d | 31 | |
0c842e0a | 32 | #include "sd-bus.h" |
9102fdc5 | 33 | #include "sd-device.h" |
3d20ed6d LP |
34 | |
35 | #include "util.h" | |
0b452006 | 36 | #include "process-util.h" |
24882e06 | 37 | #include "signal-util.h" |
3d20ed6d | 38 | #include "special.h" |
0c842e0a TG |
39 | #include "bus-util.h" |
40 | #include "bus-error.h" | |
96aad8d1 | 41 | #include "bus-common-errors.h" |
9102fdc5 | 42 | #include "device-util.h" |
eb66db55 | 43 | #include "path-util.h" |
ac6e2f0d | 44 | #include "socket-util.h" |
3d20ed6d | 45 | |
91077af6 TA |
46 | /* exit codes as defined in fsck(8) */ |
47 | enum { | |
48 | FSCK_SUCCESS = 0, | |
49 | FSCK_ERROR_CORRECTED = 1, | |
50 | FSCK_SYSTEM_SHOULD_REBOOT = 2, | |
51 | FSCK_ERRORS_LEFT_UNCORRECTED = 4, | |
52 | FSCK_OPERATIONAL_ERROR = 8, | |
53 | FSCK_USAGE_OR_SYNTAX_ERROR = 16, | |
54 | FSCK_USER_CANCELLED = 32, | |
55 | FSCK_SHARED_LIB_ERROR = 128, | |
56 | }; | |
57 | ||
3d20ed6d LP |
58 | static bool arg_skip = false; |
59 | static bool arg_force = false; | |
96d9117a | 60 | static bool arg_show_progress = false; |
f1f0198c | 61 | static const char *arg_repair = "-a"; |
3d20ed6d | 62 | |
48db40b3 | 63 | static void start_target(const char *target, const char *mode) { |
0c842e0a | 64 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
03976f7b | 65 | _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; |
0c842e0a | 66 | int r; |
3d20ed6d LP |
67 | |
68 | assert(target); | |
69 | ||
266f3e26 | 70 | r = bus_connect_system_systemd(&bus); |
0c842e0a | 71 | if (r < 0) { |
da927ba9 | 72 | log_error_errno(r, "Failed to get D-Bus connection: %m"); |
0c842e0a | 73 | return; |
3d20ed6d LP |
74 | } |
75 | ||
0c842e0a | 76 | log_info("Running request %s/start/replace", target); |
3d20ed6d | 77 | |
90bb85e1 | 78 | /* Start these units only if we can replace base.target with it */ |
0c842e0a TG |
79 | r = sd_bus_call_method(bus, |
80 | "org.freedesktop.systemd1", | |
81 | "/org/freedesktop/systemd1", | |
82 | "org.freedesktop.systemd1.Manager", | |
83 | "StartUnitReplace", | |
84 | &error, | |
85 | NULL, | |
48db40b3 | 86 | "sss", "basic.target", target, mode); |
3d20ed6d | 87 | |
5220a6f3 LP |
88 | /* Don't print a warning if we aren't called during startup */ |
89 | if (r < 0 && !sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB)) | |
24b52437 | 90 | log_error("Failed to start unit: %s", bus_error_message(&error, r)); |
3d20ed6d LP |
91 | } |
92 | ||
059cb385 | 93 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
24b52437 LP |
94 | int r; |
95 | ||
96 | assert(key); | |
059cb385 LP |
97 | |
98 | if (streq(key, "fsck.mode") && value) { | |
99 | ||
100 | if (streq(value, "auto")) | |
101 | arg_force = arg_skip = false; | |
102 | else if (streq(value, "force")) | |
103 | arg_force = true; | |
104 | else if (streq(value, "skip")) | |
105 | arg_skip = true; | |
106 | else | |
85013844 LP |
107 | log_warning("Invalid fsck.mode= parameter '%s'. Ignoring.", value); |
108 | ||
f1f0198c HHPF |
109 | } else if (streq(key, "fsck.repair") && value) { |
110 | ||
111 | if (streq(value, "preen")) | |
112 | arg_repair = "-a"; | |
24b52437 LP |
113 | else { |
114 | r = parse_boolean(value); | |
115 | if (r > 0) | |
116 | arg_repair = "-y"; | |
117 | else if (r == 0) | |
118 | arg_repair = "-n"; | |
119 | else | |
120 | log_warning("Invalid fsck.repair= parameter '%s'. Ignoring.", value); | |
121 | } | |
85013844 LP |
122 | } |
123 | ||
32f992a5 | 124 | #ifdef HAVE_SYSV_COMPAT |
059cb385 LP |
125 | else if (streq(key, "fastboot") && !value) { |
126 | log_warning("Please pass 'fsck.mode=skip' rather than 'fastboot' on the kernel command line."); | |
141a79f4 | 127 | arg_skip = true; |
85013844 | 128 | |
059cb385 LP |
129 | } else if (streq(key, "forcefsck") && !value) { |
130 | log_warning("Please pass 'fsck.mode=force' rather than 'forcefsck' on the kernel command line."); | |
141a79f4 | 131 | arg_force = true; |
3d20ed6d | 132 | } |
141a79f4 | 133 | #endif |
3d20ed6d | 134 | |
3d20ed6d LP |
135 | return 0; |
136 | } | |
137 | ||
138 | static void test_files(void) { | |
85013844 | 139 | |
32f992a5 LP |
140 | #ifdef HAVE_SYSV_COMPAT |
141 | if (access("/fastboot", F_OK) >= 0) { | |
142 | log_error("Please pass 'fsck.mode=skip' on the kernel command line rather than creating /fastboot on the root file system."); | |
3d20ed6d | 143 | arg_skip = true; |
32f992a5 | 144 | } |
3d20ed6d | 145 | |
32f992a5 LP |
146 | if (access("/forcefsck", F_OK) >= 0) { |
147 | log_error("Please pass 'fsck.mode=force' on the kernel command line rather than creating /forcefsck on the root file system."); | |
3d20ed6d | 148 | arg_force = true; |
32f992a5 LP |
149 | } |
150 | #endif | |
27d340c7 | 151 | |
96d9117a | 152 | arg_show_progress = access("/run/systemd/show-status", F_OK) >= 0; |
27d340c7 LP |
153 | } |
154 | ||
96d9117a LP |
155 | static double percent(int pass, unsigned long cur, unsigned long max) { |
156 | /* Values stolen from e2fsck */ | |
157 | ||
158 | static const int pass_table[] = { | |
159 | 0, 70, 90, 92, 95, 100 | |
27d340c7 LP |
160 | }; |
161 | ||
96d9117a LP |
162 | if (pass <= 0) |
163 | return 0.0; | |
164 | ||
165 | if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0) | |
166 | return 100.0; | |
167 | ||
168 | return (double) pass_table[pass-1] + | |
169 | ((double) pass_table[pass] - (double) pass_table[pass-1]) * | |
170 | (double) cur / (double) max; | |
171 | } | |
172 | ||
173 | static int process_progress(int fd) { | |
174 | _cleanup_fclose_ FILE *console = NULL, *f = NULL; | |
175 | usec_t last = 0; | |
176 | bool locked = false; | |
177 | int clear = 0, r; | |
178 | ||
179 | /* No progress pipe to process? Then we are a NOP. */ | |
180 | if (fd < 0) | |
181 | return 0; | |
182 | ||
183 | f = fdopen(fd, "re"); | |
184 | if (!f) { | |
185 | safe_close(fd); | |
186 | return -errno; | |
187 | } | |
188 | ||
189 | console = fopen("/dev/console", "we"); | |
190 | if (!console) | |
191 | return -ENOMEM; | |
192 | ||
193 | for (;;) { | |
194 | int pass, m; | |
195 | unsigned long cur, max; | |
ac6e2f0d | 196 | _cleanup_free_ char *device = NULL; |
96d9117a LP |
197 | double p; |
198 | usec_t t; | |
27d340c7 | 199 | |
96d9117a LP |
200 | if (fscanf(f, "%i %lu %lu %ms", &pass, &cur, &max, &device) != 4) { |
201 | ||
202 | if (ferror(f)) | |
203 | r = log_warning_errno(errno, "Failed to read from progress pipe: %m"); | |
204 | else if (feof(f)) | |
205 | r = 0; | |
206 | else { | |
207 | log_warning("Failed to parse progress pipe data"); | |
208 | r = -EBADMSG; | |
209 | } | |
27d340c7 | 210 | break; |
96d9117a LP |
211 | } |
212 | ||
213 | /* Only show one progress counter at max */ | |
214 | if (!locked) { | |
215 | if (flock(fileno(console), LOCK_EX|LOCK_NB) < 0) | |
216 | continue; | |
217 | ||
218 | locked = true; | |
219 | } | |
27d340c7 | 220 | |
27d340c7 LP |
221 | /* Only update once every 50ms */ |
222 | t = now(CLOCK_MONOTONIC); | |
e375825d | 223 | if (last + 50 * USEC_PER_MSEC > t) |
27d340c7 | 224 | continue; |
27d340c7 LP |
225 | |
226 | last = t; | |
227 | ||
96d9117a LP |
228 | p = percent(pass, cur, max); |
229 | fprintf(console, "\r%s: fsck %3.1f%% complete...\r%n", device, p, &m); | |
230 | fflush(console); | |
231 | ||
232 | if (m > clear) | |
233 | clear = m; | |
27d340c7 LP |
234 | } |
235 | ||
96d9117a LP |
236 | if (clear > 0) { |
237 | unsigned j; | |
238 | ||
239 | fputc('\r', console); | |
240 | for (j = 0; j < (unsigned) clear; j++) | |
241 | fputc(' ', console); | |
242 | fputc('\r', console); | |
243 | fflush(console); | |
244 | } | |
245 | ||
246 | return r; | |
247 | } | |
248 | ||
249 | static int fsck_progress_socket(void) { | |
250 | static const union sockaddr_union sa = { | |
251 | .un.sun_family = AF_UNIX, | |
252 | .un.sun_path = "/run/systemd/fsck.progress", | |
253 | }; | |
254 | ||
255 | int fd, r; | |
256 | ||
257 | fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
258 | if (fd < 0) | |
259 | return log_warning_errno(errno, "socket(): %m"); | |
260 | ||
261 | if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { | |
262 | r = log_full_errno(errno == ECONNREFUSED || errno == ENOENT ? LOG_DEBUG : LOG_WARNING, | |
263 | errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path); | |
264 | safe_close(fd); | |
265 | return r; | |
266 | } | |
267 | ||
268 | return fd; | |
3d20ed6d LP |
269 | } |
270 | ||
271 | int main(int argc, char *argv[]) { | |
96d9117a | 272 | _cleanup_close_pair_ int progress_pipe[2] = { -1, -1 }; |
9102fdc5 | 273 | _cleanup_device_unref_ sd_device *dev = NULL; |
94192cda | 274 | const char *device, *type; |
dc8e15c2 | 275 | bool root_directory; |
96d9117a | 276 | siginfo_t status; |
94192cda | 277 | struct stat st; |
96d9117a LP |
278 | int r; |
279 | pid_t pid; | |
3d20ed6d | 280 | |
a9e1f5ec LP |
281 | if (argc > 2) { |
282 | log_error("This program expects one or no arguments."); | |
3d20ed6d LP |
283 | return EXIT_FAILURE; |
284 | } | |
285 | ||
27d340c7 | 286 | log_set_target(LOG_TARGET_AUTO); |
3d20ed6d LP |
287 | log_parse_environment(); |
288 | log_open(); | |
289 | ||
4c12626c LP |
290 | umask(0022); |
291 | ||
e7a3aa3d LP |
292 | r = parse_proc_cmdline(parse_proc_cmdline_item); |
293 | if (r < 0) | |
294 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); | |
b5884878 | 295 | |
3d20ed6d LP |
296 | test_files(); |
297 | ||
566690fd LP |
298 | if (!arg_force && arg_skip) { |
299 | r = 0; | |
300 | goto finish; | |
301 | } | |
a9e1f5ec | 302 | |
dc8e15c2 | 303 | if (argc > 1) { |
a9e1f5ec | 304 | device = argv[1]; |
94192cda ZJS |
305 | |
306 | if (stat(device, &st) < 0) { | |
e7a3aa3d LP |
307 | r = log_error_errno(errno, "Failed to stat %s: %m", device); |
308 | goto finish; | |
309 | } | |
310 | ||
311 | if (!S_ISBLK(st.st_mode)) { | |
312 | log_error("%s is not a block device.", device); | |
313 | r = -EINVAL; | |
566690fd | 314 | goto finish; |
94192cda ZJS |
315 | } |
316 | ||
9102fdc5 TG |
317 | r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev); |
318 | if (r < 0) { | |
319 | log_error_errno(r, "Failed to detect device %s: %m", device); | |
566690fd | 320 | goto finish; |
94192cda | 321 | } |
e7a3aa3d LP |
322 | |
323 | root_directory = false; | |
dc8e15c2 | 324 | } else { |
a84f5192 | 325 | struct timespec times[2]; |
3d20ed6d | 326 | |
a9e1f5ec LP |
327 | /* Find root device */ |
328 | ||
329 | if (stat("/", &st) < 0) { | |
566690fd LP |
330 | r = log_error_errno(errno, "Failed to stat() the root directory: %m"); |
331 | goto finish; | |
a9e1f5ec LP |
332 | } |
333 | ||
334 | /* Virtual root devices don't need an fsck */ | |
566690fd | 335 | if (major(st.st_dev) == 0) { |
e7a3aa3d | 336 | log_debug("Root directory is virtual or btrfs, skipping check."); |
566690fd LP |
337 | r = 0; |
338 | goto finish; | |
339 | } | |
a9e1f5ec | 340 | |
a84f5192 KS |
341 | /* check if we are already writable */ |
342 | times[0] = st.st_atim; | |
343 | times[1] = st.st_mtim; | |
e7a3aa3d | 344 | |
a84f5192 | 345 | if (utimensat(AT_FDCWD, "/", times, 0) == 0) { |
cf1a1055 | 346 | log_info("Root directory is writable, skipping check."); |
566690fd LP |
347 | r = 0; |
348 | goto finish; | |
a84f5192 KS |
349 | } |
350 | ||
9102fdc5 TG |
351 | r = sd_device_new_from_devnum(&dev, 'b', st.st_dev); |
352 | if (r < 0) { | |
353 | log_error_errno(r, "Failed to detect root device: %m"); | |
566690fd | 354 | goto finish; |
a9e1f5ec LP |
355 | } |
356 | ||
9102fdc5 TG |
357 | r = sd_device_get_devname(dev, &device); |
358 | if (r < 0) { | |
359 | log_error_errno(r, "Failed to detect device node of root directory: %m"); | |
566690fd | 360 | goto finish; |
3e33a44a | 361 | } |
dc8e15c2 LP |
362 | |
363 | root_directory = true; | |
3d20ed6d LP |
364 | } |
365 | ||
9102fdc5 TG |
366 | r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type); |
367 | if (r >= 0) { | |
eb66db55 | 368 | r = fsck_exists(type); |
85eca92e LP |
369 | if (r < 0) |
370 | log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device); | |
371 | else if (r == 0) { | |
372 | log_info("fsck.%s doesn't exist, not checking file system on %s.", type, device); | |
566690fd | 373 | goto finish; |
85eca92e | 374 | } |
94192cda ZJS |
375 | } |
376 | ||
96d9117a LP |
377 | if (arg_show_progress) { |
378 | if (pipe(progress_pipe) < 0) { | |
379 | r = log_error_errno(errno, "pipe(): %m"); | |
380 | goto finish; | |
381 | } | |
19e887e7 | 382 | } |
27d340c7 | 383 | |
27d340c7 LP |
384 | pid = fork(); |
385 | if (pid < 0) { | |
566690fd | 386 | r = log_error_errno(errno, "fork(): %m"); |
3d20ed6d | 387 | goto finish; |
96d9117a LP |
388 | } |
389 | if (pid == 0) { | |
390 | char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1]; | |
391 | int progress_socket = -1; | |
392 | const char *cmdline[9]; | |
393 | int i = 0; | |
394 | ||
3d20ed6d | 395 | /* Child */ |
96d9117a | 396 | |
ce30c8dc LP |
397 | (void) reset_all_signal_handlers(); |
398 | (void) reset_signal_mask(); | |
96d9117a LP |
399 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
400 | ||
401 | /* Close the reading side of the progress pipe */ | |
1952708a | 402 | progress_pipe[0] = safe_close(progress_pipe[0]); |
96d9117a LP |
403 | |
404 | /* Try to connect to a progress management daemon, if there is one */ | |
405 | progress_socket = fsck_progress_socket(); | |
406 | if (progress_socket >= 0) { | |
407 | /* If this worked we close the progress pipe early, and just use the socket */ | |
408 | progress_pipe[1] = safe_close(progress_pipe[1]); | |
409 | xsprintf(dash_c, "-C%i", progress_socket); | |
410 | } else if (progress_pipe[1] >= 0) { | |
411 | /* Otherwise if we have the progress pipe to our own local handle, we use it */ | |
412 | xsprintf(dash_c, "-C%i", progress_pipe[1]); | |
413 | } else | |
414 | dash_c[0] = 0; | |
415 | ||
416 | cmdline[i++] = "/sbin/fsck"; | |
417 | cmdline[i++] = arg_repair; | |
418 | cmdline[i++] = "-T"; | |
419 | ||
420 | /* | |
421 | * Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files. | |
422 | * The previous versions use flock for the device and conflict with | |
423 | * udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5 | |
424 | */ | |
425 | cmdline[i++] = "-l"; | |
426 | ||
427 | if (!root_directory) | |
428 | cmdline[i++] = "-M"; | |
429 | ||
430 | if (arg_force) | |
431 | cmdline[i++] = "-f"; | |
432 | ||
433 | if (!isempty(dash_c)) | |
434 | cmdline[i++] = dash_c; | |
435 | ||
436 | cmdline[i++] = device; | |
437 | cmdline[i++] = NULL; | |
438 | ||
3d20ed6d | 439 | execv(cmdline[0], (char**) cmdline); |
91077af6 | 440 | _exit(FSCK_OPERATIONAL_ERROR); |
3d20ed6d LP |
441 | } |
442 | ||
03e334a1 | 443 | progress_pipe[1] = safe_close(progress_pipe[1]); |
96d9117a | 444 | (void) process_progress(progress_pipe[0]); |
576a13ea | 445 | progress_pipe[0] = -1; |
27d340c7 | 446 | |
566690fd LP |
447 | r = wait_for_terminate(pid, &status); |
448 | if (r < 0) { | |
449 | log_error_errno(r, "waitid(): %m"); | |
3d20ed6d LP |
450 | goto finish; |
451 | } | |
452 | ||
96d9117a | 453 | if (status.si_code != CLD_EXITED || (status.si_status & ~1)) { |
3d20ed6d | 454 | |
96d9117a | 455 | if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED) |
a9e1f5ec LP |
456 | log_error("fsck terminated by signal %s.", signal_to_string(status.si_status)); |
457 | else if (status.si_code == CLD_EXITED) | |
458 | log_error("fsck failed with error code %i.", status.si_status); | |
96d9117a | 459 | else |
a9e1f5ec | 460 | log_error("fsck failed due to unknown reason."); |
3d20ed6d | 461 | |
566690fd LP |
462 | r = -EINVAL; |
463 | ||
91077af6 | 464 | if (status.si_code == CLD_EXITED && (status.si_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory) |
3d20ed6d | 465 | /* System should be rebooted. */ |
48db40b3 | 466 | start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly"); |
91077af6 | 467 | else if (status.si_code == CLD_EXITED && (status.si_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED))) |
3d20ed6d | 468 | /* Some other problem */ |
48db40b3 | 469 | start_target(SPECIAL_EMERGENCY_TARGET, "replace"); |
a4c24ff7 | 470 | else { |
96d9117a | 471 | log_warning("Ignoring error."); |
566690fd | 472 | r = 0; |
a4c24ff7 | 473 | } |
3d20ed6d LP |
474 | |
475 | } else | |
566690fd | 476 | r = 0; |
3d20ed6d | 477 | |
91077af6 | 478 | if (status.si_code == CLD_EXITED && (status.si_status & FSCK_ERROR_CORRECTED)) |
e7a3aa3d | 479 | (void) touch("/run/systemd/quotacheck"); |
3d20ed6d LP |
480 | |
481 | finish: | |
566690fd | 482 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
3d20ed6d | 483 | } |