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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 | 34 | |
96aad8d1 | 35 | #include "bus-common-errors.h" |
3ffd4af2 LP |
36 | #include "bus-error.h" |
37 | #include "bus-util.h" | |
9102fdc5 | 38 | #include "device-util.h" |
3ffd4af2 | 39 | #include "fd-util.h" |
6bedfcbb | 40 | #include "parse-util.h" |
eb66db55 | 41 | #include "path-util.h" |
3ffd4af2 LP |
42 | #include "process-util.h" |
43 | #include "signal-util.h" | |
ac6e2f0d | 44 | #include "socket-util.h" |
3ffd4af2 LP |
45 | #include "special.h" |
46 | #include "util.h" | |
3d20ed6d | 47 | |
91077af6 TA |
48 | /* exit codes as defined in fsck(8) */ |
49 | enum { | |
50 | FSCK_SUCCESS = 0, | |
51 | FSCK_ERROR_CORRECTED = 1, | |
52 | FSCK_SYSTEM_SHOULD_REBOOT = 2, | |
53 | FSCK_ERRORS_LEFT_UNCORRECTED = 4, | |
54 | FSCK_OPERATIONAL_ERROR = 8, | |
55 | FSCK_USAGE_OR_SYNTAX_ERROR = 16, | |
56 | FSCK_USER_CANCELLED = 32, | |
57 | FSCK_SHARED_LIB_ERROR = 128, | |
58 | }; | |
59 | ||
3d20ed6d LP |
60 | static bool arg_skip = false; |
61 | static bool arg_force = false; | |
96d9117a | 62 | static bool arg_show_progress = false; |
f1f0198c | 63 | static const char *arg_repair = "-a"; |
3d20ed6d | 64 | |
48db40b3 | 65 | static void start_target(const char *target, const char *mode) { |
0c842e0a | 66 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
03976f7b | 67 | _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; |
0c842e0a | 68 | int r; |
3d20ed6d LP |
69 | |
70 | assert(target); | |
71 | ||
266f3e26 | 72 | r = bus_connect_system_systemd(&bus); |
0c842e0a | 73 | if (r < 0) { |
da927ba9 | 74 | log_error_errno(r, "Failed to get D-Bus connection: %m"); |
0c842e0a | 75 | return; |
3d20ed6d LP |
76 | } |
77 | ||
0c842e0a | 78 | log_info("Running request %s/start/replace", target); |
3d20ed6d | 79 | |
90bb85e1 | 80 | /* Start these units only if we can replace base.target with it */ |
0c842e0a TG |
81 | r = sd_bus_call_method(bus, |
82 | "org.freedesktop.systemd1", | |
83 | "/org/freedesktop/systemd1", | |
84 | "org.freedesktop.systemd1.Manager", | |
85 | "StartUnitReplace", | |
86 | &error, | |
87 | NULL, | |
48db40b3 | 88 | "sss", "basic.target", target, mode); |
3d20ed6d | 89 | |
5220a6f3 LP |
90 | /* Don't print a warning if we aren't called during startup */ |
91 | if (r < 0 && !sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB)) | |
24b52437 | 92 | log_error("Failed to start unit: %s", bus_error_message(&error, r)); |
3d20ed6d LP |
93 | } |
94 | ||
059cb385 | 95 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
24b52437 LP |
96 | int r; |
97 | ||
98 | assert(key); | |
059cb385 LP |
99 | |
100 | if (streq(key, "fsck.mode") && value) { | |
101 | ||
102 | if (streq(value, "auto")) | |
103 | arg_force = arg_skip = false; | |
104 | else if (streq(value, "force")) | |
105 | arg_force = true; | |
106 | else if (streq(value, "skip")) | |
107 | arg_skip = true; | |
108 | else | |
85013844 LP |
109 | log_warning("Invalid fsck.mode= parameter '%s'. Ignoring.", value); |
110 | ||
f1f0198c HHPF |
111 | } else if (streq(key, "fsck.repair") && value) { |
112 | ||
113 | if (streq(value, "preen")) | |
114 | arg_repair = "-a"; | |
24b52437 LP |
115 | else { |
116 | r = parse_boolean(value); | |
117 | if (r > 0) | |
118 | arg_repair = "-y"; | |
119 | else if (r == 0) | |
120 | arg_repair = "-n"; | |
121 | else | |
122 | log_warning("Invalid fsck.repair= parameter '%s'. Ignoring.", value); | |
123 | } | |
85013844 LP |
124 | } |
125 | ||
32f992a5 | 126 | #ifdef HAVE_SYSV_COMPAT |
059cb385 LP |
127 | else if (streq(key, "fastboot") && !value) { |
128 | log_warning("Please pass 'fsck.mode=skip' rather than 'fastboot' on the kernel command line."); | |
141a79f4 | 129 | arg_skip = true; |
85013844 | 130 | |
059cb385 LP |
131 | } else if (streq(key, "forcefsck") && !value) { |
132 | log_warning("Please pass 'fsck.mode=force' rather than 'forcefsck' on the kernel command line."); | |
141a79f4 | 133 | arg_force = true; |
3d20ed6d | 134 | } |
141a79f4 | 135 | #endif |
3d20ed6d | 136 | |
3d20ed6d LP |
137 | return 0; |
138 | } | |
139 | ||
140 | static void test_files(void) { | |
85013844 | 141 | |
32f992a5 LP |
142 | #ifdef HAVE_SYSV_COMPAT |
143 | if (access("/fastboot", F_OK) >= 0) { | |
144 | log_error("Please pass 'fsck.mode=skip' on the kernel command line rather than creating /fastboot on the root file system."); | |
3d20ed6d | 145 | arg_skip = true; |
32f992a5 | 146 | } |
3d20ed6d | 147 | |
32f992a5 LP |
148 | if (access("/forcefsck", F_OK) >= 0) { |
149 | log_error("Please pass 'fsck.mode=force' on the kernel command line rather than creating /forcefsck on the root file system."); | |
3d20ed6d | 150 | arg_force = true; |
32f992a5 LP |
151 | } |
152 | #endif | |
27d340c7 | 153 | |
96d9117a | 154 | arg_show_progress = access("/run/systemd/show-status", F_OK) >= 0; |
27d340c7 LP |
155 | } |
156 | ||
96d9117a LP |
157 | static double percent(int pass, unsigned long cur, unsigned long max) { |
158 | /* Values stolen from e2fsck */ | |
159 | ||
160 | static const int pass_table[] = { | |
161 | 0, 70, 90, 92, 95, 100 | |
27d340c7 LP |
162 | }; |
163 | ||
96d9117a LP |
164 | if (pass <= 0) |
165 | return 0.0; | |
166 | ||
167 | if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0) | |
168 | return 100.0; | |
169 | ||
170 | return (double) pass_table[pass-1] + | |
171 | ((double) pass_table[pass] - (double) pass_table[pass-1]) * | |
172 | (double) cur / (double) max; | |
173 | } | |
174 | ||
175 | static int process_progress(int fd) { | |
176 | _cleanup_fclose_ FILE *console = NULL, *f = NULL; | |
177 | usec_t last = 0; | |
178 | bool locked = false; | |
179 | int clear = 0, r; | |
180 | ||
181 | /* No progress pipe to process? Then we are a NOP. */ | |
182 | if (fd < 0) | |
183 | return 0; | |
184 | ||
185 | f = fdopen(fd, "re"); | |
186 | if (!f) { | |
187 | safe_close(fd); | |
188 | return -errno; | |
189 | } | |
190 | ||
191 | console = fopen("/dev/console", "we"); | |
192 | if (!console) | |
193 | return -ENOMEM; | |
194 | ||
195 | for (;;) { | |
196 | int pass, m; | |
197 | unsigned long cur, max; | |
ac6e2f0d | 198 | _cleanup_free_ char *device = NULL; |
96d9117a LP |
199 | double p; |
200 | usec_t t; | |
27d340c7 | 201 | |
96d9117a LP |
202 | if (fscanf(f, "%i %lu %lu %ms", &pass, &cur, &max, &device) != 4) { |
203 | ||
204 | if (ferror(f)) | |
205 | r = log_warning_errno(errno, "Failed to read from progress pipe: %m"); | |
206 | else if (feof(f)) | |
207 | r = 0; | |
208 | else { | |
209 | log_warning("Failed to parse progress pipe data"); | |
210 | r = -EBADMSG; | |
211 | } | |
27d340c7 | 212 | break; |
96d9117a LP |
213 | } |
214 | ||
215 | /* Only show one progress counter at max */ | |
216 | if (!locked) { | |
217 | if (flock(fileno(console), LOCK_EX|LOCK_NB) < 0) | |
218 | continue; | |
219 | ||
220 | locked = true; | |
221 | } | |
27d340c7 | 222 | |
27d340c7 LP |
223 | /* Only update once every 50ms */ |
224 | t = now(CLOCK_MONOTONIC); | |
e375825d | 225 | if (last + 50 * USEC_PER_MSEC > t) |
27d340c7 | 226 | continue; |
27d340c7 LP |
227 | |
228 | last = t; | |
229 | ||
96d9117a LP |
230 | p = percent(pass, cur, max); |
231 | fprintf(console, "\r%s: fsck %3.1f%% complete...\r%n", device, p, &m); | |
232 | fflush(console); | |
233 | ||
234 | if (m > clear) | |
235 | clear = m; | |
27d340c7 LP |
236 | } |
237 | ||
96d9117a LP |
238 | if (clear > 0) { |
239 | unsigned j; | |
240 | ||
241 | fputc('\r', console); | |
242 | for (j = 0; j < (unsigned) clear; j++) | |
243 | fputc(' ', console); | |
244 | fputc('\r', console); | |
245 | fflush(console); | |
246 | } | |
247 | ||
248 | return r; | |
249 | } | |
250 | ||
251 | static int fsck_progress_socket(void) { | |
252 | static const union sockaddr_union sa = { | |
253 | .un.sun_family = AF_UNIX, | |
254 | .un.sun_path = "/run/systemd/fsck.progress", | |
255 | }; | |
256 | ||
257 | int fd, r; | |
258 | ||
259 | fd = socket(AF_UNIX, SOCK_STREAM, 0); | |
260 | if (fd < 0) | |
261 | return log_warning_errno(errno, "socket(): %m"); | |
262 | ||
263 | if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { | |
264 | r = log_full_errno(errno == ECONNREFUSED || errno == ENOENT ? LOG_DEBUG : LOG_WARNING, | |
265 | errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path); | |
266 | safe_close(fd); | |
267 | return r; | |
268 | } | |
269 | ||
270 | return fd; | |
3d20ed6d LP |
271 | } |
272 | ||
273 | int main(int argc, char *argv[]) { | |
96d9117a | 274 | _cleanup_close_pair_ int progress_pipe[2] = { -1, -1 }; |
9102fdc5 | 275 | _cleanup_device_unref_ sd_device *dev = NULL; |
94192cda | 276 | const char *device, *type; |
dc8e15c2 | 277 | bool root_directory; |
96d9117a | 278 | siginfo_t status; |
94192cda | 279 | struct stat st; |
96d9117a LP |
280 | int r; |
281 | pid_t pid; | |
3d20ed6d | 282 | |
a9e1f5ec LP |
283 | if (argc > 2) { |
284 | log_error("This program expects one or no arguments."); | |
3d20ed6d LP |
285 | return EXIT_FAILURE; |
286 | } | |
287 | ||
27d340c7 | 288 | log_set_target(LOG_TARGET_AUTO); |
3d20ed6d LP |
289 | log_parse_environment(); |
290 | log_open(); | |
291 | ||
4c12626c LP |
292 | umask(0022); |
293 | ||
e7a3aa3d LP |
294 | r = parse_proc_cmdline(parse_proc_cmdline_item); |
295 | if (r < 0) | |
296 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); | |
b5884878 | 297 | |
3d20ed6d LP |
298 | test_files(); |
299 | ||
566690fd LP |
300 | if (!arg_force && arg_skip) { |
301 | r = 0; | |
302 | goto finish; | |
303 | } | |
a9e1f5ec | 304 | |
dc8e15c2 | 305 | if (argc > 1) { |
a9e1f5ec | 306 | device = argv[1]; |
94192cda ZJS |
307 | |
308 | if (stat(device, &st) < 0) { | |
e7a3aa3d LP |
309 | r = log_error_errno(errno, "Failed to stat %s: %m", device); |
310 | goto finish; | |
311 | } | |
312 | ||
313 | if (!S_ISBLK(st.st_mode)) { | |
314 | log_error("%s is not a block device.", device); | |
315 | r = -EINVAL; | |
566690fd | 316 | goto finish; |
94192cda ZJS |
317 | } |
318 | ||
9102fdc5 TG |
319 | r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev); |
320 | if (r < 0) { | |
321 | log_error_errno(r, "Failed to detect device %s: %m", device); | |
566690fd | 322 | goto finish; |
94192cda | 323 | } |
e7a3aa3d LP |
324 | |
325 | root_directory = false; | |
dc8e15c2 | 326 | } else { |
a84f5192 | 327 | struct timespec times[2]; |
3d20ed6d | 328 | |
a9e1f5ec LP |
329 | /* Find root device */ |
330 | ||
331 | if (stat("/", &st) < 0) { | |
566690fd LP |
332 | r = log_error_errno(errno, "Failed to stat() the root directory: %m"); |
333 | goto finish; | |
a9e1f5ec LP |
334 | } |
335 | ||
336 | /* Virtual root devices don't need an fsck */ | |
566690fd | 337 | if (major(st.st_dev) == 0) { |
e7a3aa3d | 338 | log_debug("Root directory is virtual or btrfs, skipping check."); |
566690fd LP |
339 | r = 0; |
340 | goto finish; | |
341 | } | |
a9e1f5ec | 342 | |
a84f5192 KS |
343 | /* check if we are already writable */ |
344 | times[0] = st.st_atim; | |
345 | times[1] = st.st_mtim; | |
e7a3aa3d | 346 | |
a84f5192 | 347 | if (utimensat(AT_FDCWD, "/", times, 0) == 0) { |
cf1a1055 | 348 | log_info("Root directory is writable, skipping check."); |
566690fd LP |
349 | r = 0; |
350 | goto finish; | |
a84f5192 KS |
351 | } |
352 | ||
9102fdc5 TG |
353 | r = sd_device_new_from_devnum(&dev, 'b', st.st_dev); |
354 | if (r < 0) { | |
355 | log_error_errno(r, "Failed to detect root device: %m"); | |
566690fd | 356 | goto finish; |
a9e1f5ec LP |
357 | } |
358 | ||
9102fdc5 TG |
359 | r = sd_device_get_devname(dev, &device); |
360 | if (r < 0) { | |
361 | log_error_errno(r, "Failed to detect device node of root directory: %m"); | |
566690fd | 362 | goto finish; |
3e33a44a | 363 | } |
dc8e15c2 LP |
364 | |
365 | root_directory = true; | |
3d20ed6d LP |
366 | } |
367 | ||
9102fdc5 TG |
368 | r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type); |
369 | if (r >= 0) { | |
eb66db55 | 370 | r = fsck_exists(type); |
85eca92e LP |
371 | if (r < 0) |
372 | log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device); | |
373 | else if (r == 0) { | |
374 | log_info("fsck.%s doesn't exist, not checking file system on %s.", type, device); | |
566690fd | 375 | goto finish; |
85eca92e | 376 | } |
94192cda ZJS |
377 | } |
378 | ||
96d9117a LP |
379 | if (arg_show_progress) { |
380 | if (pipe(progress_pipe) < 0) { | |
381 | r = log_error_errno(errno, "pipe(): %m"); | |
382 | goto finish; | |
383 | } | |
19e887e7 | 384 | } |
27d340c7 | 385 | |
27d340c7 LP |
386 | pid = fork(); |
387 | if (pid < 0) { | |
566690fd | 388 | r = log_error_errno(errno, "fork(): %m"); |
3d20ed6d | 389 | goto finish; |
96d9117a LP |
390 | } |
391 | if (pid == 0) { | |
392 | char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1]; | |
393 | int progress_socket = -1; | |
394 | const char *cmdline[9]; | |
395 | int i = 0; | |
396 | ||
3d20ed6d | 397 | /* Child */ |
96d9117a | 398 | |
ce30c8dc LP |
399 | (void) reset_all_signal_handlers(); |
400 | (void) reset_signal_mask(); | |
96d9117a LP |
401 | assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
402 | ||
403 | /* Close the reading side of the progress pipe */ | |
1952708a | 404 | progress_pipe[0] = safe_close(progress_pipe[0]); |
96d9117a LP |
405 | |
406 | /* Try to connect to a progress management daemon, if there is one */ | |
407 | progress_socket = fsck_progress_socket(); | |
408 | if (progress_socket >= 0) { | |
409 | /* If this worked we close the progress pipe early, and just use the socket */ | |
410 | progress_pipe[1] = safe_close(progress_pipe[1]); | |
411 | xsprintf(dash_c, "-C%i", progress_socket); | |
412 | } else if (progress_pipe[1] >= 0) { | |
413 | /* Otherwise if we have the progress pipe to our own local handle, we use it */ | |
414 | xsprintf(dash_c, "-C%i", progress_pipe[1]); | |
415 | } else | |
416 | dash_c[0] = 0; | |
417 | ||
418 | cmdline[i++] = "/sbin/fsck"; | |
419 | cmdline[i++] = arg_repair; | |
420 | cmdline[i++] = "-T"; | |
421 | ||
422 | /* | |
423 | * Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files. | |
424 | * The previous versions use flock for the device and conflict with | |
425 | * udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5 | |
426 | */ | |
427 | cmdline[i++] = "-l"; | |
428 | ||
429 | if (!root_directory) | |
430 | cmdline[i++] = "-M"; | |
431 | ||
432 | if (arg_force) | |
433 | cmdline[i++] = "-f"; | |
434 | ||
435 | if (!isempty(dash_c)) | |
436 | cmdline[i++] = dash_c; | |
437 | ||
438 | cmdline[i++] = device; | |
439 | cmdline[i++] = NULL; | |
440 | ||
3d20ed6d | 441 | execv(cmdline[0], (char**) cmdline); |
91077af6 | 442 | _exit(FSCK_OPERATIONAL_ERROR); |
3d20ed6d LP |
443 | } |
444 | ||
03e334a1 | 445 | progress_pipe[1] = safe_close(progress_pipe[1]); |
96d9117a | 446 | (void) process_progress(progress_pipe[0]); |
576a13ea | 447 | progress_pipe[0] = -1; |
27d340c7 | 448 | |
566690fd LP |
449 | r = wait_for_terminate(pid, &status); |
450 | if (r < 0) { | |
451 | log_error_errno(r, "waitid(): %m"); | |
3d20ed6d LP |
452 | goto finish; |
453 | } | |
454 | ||
96d9117a | 455 | if (status.si_code != CLD_EXITED || (status.si_status & ~1)) { |
3d20ed6d | 456 | |
96d9117a | 457 | if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED) |
a9e1f5ec LP |
458 | log_error("fsck terminated by signal %s.", signal_to_string(status.si_status)); |
459 | else if (status.si_code == CLD_EXITED) | |
460 | log_error("fsck failed with error code %i.", status.si_status); | |
96d9117a | 461 | else |
a9e1f5ec | 462 | log_error("fsck failed due to unknown reason."); |
3d20ed6d | 463 | |
566690fd LP |
464 | r = -EINVAL; |
465 | ||
91077af6 | 466 | if (status.si_code == CLD_EXITED && (status.si_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory) |
3d20ed6d | 467 | /* System should be rebooted. */ |
48db40b3 | 468 | start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly"); |
91077af6 | 469 | else if (status.si_code == CLD_EXITED && (status.si_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED))) |
3d20ed6d | 470 | /* Some other problem */ |
48db40b3 | 471 | start_target(SPECIAL_EMERGENCY_TARGET, "replace"); |
a4c24ff7 | 472 | else { |
96d9117a | 473 | log_warning("Ignoring error."); |
566690fd | 474 | r = 0; |
a4c24ff7 | 475 | } |
3d20ed6d LP |
476 | |
477 | } else | |
566690fd | 478 | r = 0; |
3d20ed6d | 479 | |
91077af6 | 480 | if (status.si_code == CLD_EXITED && (status.si_status & FSCK_ERROR_CORRECTED)) |
e7a3aa3d | 481 | (void) touch("/run/systemd/quotacheck"); |
3d20ed6d LP |
482 | |
483 | finish: | |
566690fd | 484 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
3d20ed6d | 485 | } |