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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> |
3d20ed6d | 30 | |
0c842e0a | 31 | #include "sd-bus.h" |
9102fdc5 | 32 | #include "sd-device.h" |
3d20ed6d LP |
33 | |
34 | #include "util.h" | |
3d20ed6d | 35 | #include "special.h" |
0c842e0a TG |
36 | #include "bus-util.h" |
37 | #include "bus-error.h" | |
96aad8d1 | 38 | #include "bus-common-errors.h" |
9102fdc5 | 39 | #include "device-util.h" |
eb66db55 | 40 | #include "path-util.h" |
ac6e2f0d DR |
41 | #include "socket-util.h" |
42 | #include "fsckd/fsckd.h" | |
3d20ed6d LP |
43 | |
44 | static bool arg_skip = false; | |
45 | static bool arg_force = false; | |
f1f0198c | 46 | static const char *arg_repair = "-a"; |
3d20ed6d | 47 | |
80cfe9e1 | 48 | static void start_target(const char *target) { |
0c842e0a | 49 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
24996861 | 50 | _cleanup_bus_close_unref_ sd_bus *bus = NULL; |
0c842e0a | 51 | int r; |
3d20ed6d LP |
52 | |
53 | assert(target); | |
54 | ||
0f8bd8de | 55 | r = bus_open_system_systemd(&bus); |
0c842e0a | 56 | if (r < 0) { |
da927ba9 | 57 | log_error_errno(r, "Failed to get D-Bus connection: %m"); |
0c842e0a | 58 | return; |
3d20ed6d LP |
59 | } |
60 | ||
0c842e0a | 61 | log_info("Running request %s/start/replace", target); |
3d20ed6d | 62 | |
90bb85e1 | 63 | /* Start these units only if we can replace base.target with it */ |
0c842e0a TG |
64 | r = sd_bus_call_method(bus, |
65 | "org.freedesktop.systemd1", | |
66 | "/org/freedesktop/systemd1", | |
67 | "org.freedesktop.systemd1.Manager", | |
68 | "StartUnitReplace", | |
69 | &error, | |
70 | NULL, | |
71 | "sss", "basic.target", target, "replace"); | |
3d20ed6d | 72 | |
5220a6f3 LP |
73 | /* Don't print a warning if we aren't called during startup */ |
74 | if (r < 0 && !sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB)) | |
75 | log_error("Failed to start unit: %s", bus_error_message(&error, -r)); | |
3d20ed6d LP |
76 | } |
77 | ||
059cb385 LP |
78 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
79 | ||
80 | if (streq(key, "fsck.mode") && value) { | |
81 | ||
82 | if (streq(value, "auto")) | |
83 | arg_force = arg_skip = false; | |
84 | else if (streq(value, "force")) | |
85 | arg_force = true; | |
86 | else if (streq(value, "skip")) | |
87 | arg_skip = true; | |
88 | else | |
85013844 LP |
89 | log_warning("Invalid fsck.mode= parameter '%s'. Ignoring.", value); |
90 | ||
f1f0198c HHPF |
91 | } else if (streq(key, "fsck.repair") && value) { |
92 | ||
93 | if (streq(value, "preen")) | |
94 | arg_repair = "-a"; | |
95 | else if (streq(value, "yes")) | |
96 | arg_repair = "-y"; | |
97 | else if (streq(value, "no")) | |
98 | arg_repair = "-n"; | |
99 | else | |
85013844 LP |
100 | log_warning("Invalid fsck.repair= parameter '%s'. Ignoring.", value); |
101 | } | |
102 | ||
32f992a5 | 103 | #ifdef HAVE_SYSV_COMPAT |
059cb385 LP |
104 | else if (streq(key, "fastboot") && !value) { |
105 | log_warning("Please pass 'fsck.mode=skip' rather than 'fastboot' on the kernel command line."); | |
141a79f4 | 106 | arg_skip = true; |
85013844 | 107 | |
059cb385 LP |
108 | } else if (streq(key, "forcefsck") && !value) { |
109 | log_warning("Please pass 'fsck.mode=force' rather than 'forcefsck' on the kernel command line."); | |
141a79f4 | 110 | arg_force = true; |
3d20ed6d | 111 | } |
141a79f4 | 112 | #endif |
3d20ed6d | 113 | |
3d20ed6d LP |
114 | return 0; |
115 | } | |
116 | ||
117 | static void test_files(void) { | |
85013844 | 118 | |
32f992a5 LP |
119 | #ifdef HAVE_SYSV_COMPAT |
120 | if (access("/fastboot", F_OK) >= 0) { | |
121 | log_error("Please pass 'fsck.mode=skip' on the kernel command line rather than creating /fastboot on the root file system."); | |
3d20ed6d | 122 | arg_skip = true; |
32f992a5 | 123 | } |
3d20ed6d | 124 | |
32f992a5 LP |
125 | if (access("/forcefsck", F_OK) >= 0) { |
126 | log_error("Please pass 'fsck.mode=force' on the kernel command line rather than creating /forcefsck on the root file system."); | |
3d20ed6d | 127 | arg_force = true; |
32f992a5 LP |
128 | } |
129 | #endif | |
27d340c7 | 130 | |
27d340c7 LP |
131 | } |
132 | ||
07f9a21b | 133 | static int process_progress(int fd, pid_t fsck_pid, dev_t device_num) { |
ac6e2f0d DR |
134 | _cleanup_fclose_ FILE *f = NULL; |
135 | usec_t last = 0; | |
136 | _cleanup_close_ int fsckd_fd = -1; | |
137 | static const union sockaddr_union sa = { | |
138 | .un.sun_family = AF_UNIX, | |
139 | .un.sun_path = FSCKD_SOCKET_PATH, | |
27d340c7 LP |
140 | }; |
141 | ||
ac6e2f0d DR |
142 | fsckd_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0); |
143 | if (fsckd_fd < 0) | |
144 | return log_warning_errno(errno, "Cannot open fsckd socket, we won't report fsck progress: %m"); | |
145 | if (connect(fsckd_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) | |
146 | return log_warning_errno(errno, "Cannot connect to fsckd socket, we won't report fsck progress: %m"); | |
27d340c7 LP |
147 | |
148 | f = fdopen(fd, "r"); | |
ac6e2f0d DR |
149 | if (!f) |
150 | return log_warning_errno(errno, "Cannot connect to fsck, we won't report fsck progress: %m"); | |
27d340c7 LP |
151 | |
152 | while (!feof(f)) { | |
ac6e2f0d | 153 | int pass; |
07f9a21b | 154 | size_t buflen; |
ac6e2f0d | 155 | size_t cur, max; |
07f9a21b | 156 | ssize_t r; |
27d340c7 | 157 | usec_t t; |
ac6e2f0d DR |
158 | _cleanup_free_ char *device = NULL; |
159 | FsckProgress progress; | |
07f9a21b | 160 | FsckdMessage fsckd_message; |
27d340c7 | 161 | |
1bc48c04 | 162 | if (fscanf(f, "%i %zu %zu %ms", &pass, &cur, &max, &device) != 4) |
27d340c7 LP |
163 | break; |
164 | ||
27d340c7 LP |
165 | /* Only update once every 50ms */ |
166 | t = now(CLOCK_MONOTONIC); | |
e375825d | 167 | if (last + 50 * USEC_PER_MSEC > t) |
27d340c7 | 168 | continue; |
27d340c7 LP |
169 | |
170 | last = t; | |
171 | ||
ac6e2f0d DR |
172 | /* send progress to fsckd */ |
173 | progress.devnum = device_num; | |
174 | progress.cur = cur; | |
175 | progress.max = max; | |
176 | progress.pass = pass; | |
27d340c7 | 177 | |
07f9a21b DR |
178 | r = send(fsckd_fd, &progress, sizeof(FsckProgress), 0); |
179 | if (r < 0 || (size_t) r < sizeof(FsckProgress)) | |
ac6e2f0d | 180 | log_warning_errno(errno, "Cannot communicate fsck progress to fsckd: %m"); |
07f9a21b DR |
181 | |
182 | /* get fsckd requests, only read when we have coherent size data */ | |
183 | r = ioctl(fsckd_fd, FIONREAD, &buflen); | |
184 | if (r == 0 && (size_t) buflen >= sizeof(FsckdMessage)) { | |
185 | r = recv(fsckd_fd, &fsckd_message, sizeof(FsckdMessage), 0); | |
186 | if (r > 0 && fsckd_message.cancel == 1) { | |
187 | log_info("Request to cancel fsck from fsckd"); | |
188 | kill(fsck_pid, SIGTERM); | |
189 | } | |
190 | } | |
27d340c7 LP |
191 | } |
192 | ||
27d340c7 | 193 | return 0; |
3d20ed6d LP |
194 | } |
195 | ||
196 | int main(int argc, char *argv[]) { | |
27d340c7 | 197 | const char *cmdline[9]; |
3d20ed6d LP |
198 | int i = 0, r = EXIT_FAILURE, q; |
199 | pid_t pid; | |
07f9a21b | 200 | int progress_rc; |
3d20ed6d | 201 | siginfo_t status; |
9102fdc5 | 202 | _cleanup_device_unref_ sd_device *dev = NULL; |
94192cda | 203 | const char *device, *type; |
dc8e15c2 | 204 | bool root_directory; |
1952708a | 205 | _cleanup_close_pair_ int progress_pipe[2] = { -1, -1 }; |
5ffa8c81 | 206 | char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1]; |
94192cda | 207 | struct stat st; |
3d20ed6d | 208 | |
a9e1f5ec LP |
209 | if (argc > 2) { |
210 | log_error("This program expects one or no arguments."); | |
3d20ed6d LP |
211 | return EXIT_FAILURE; |
212 | } | |
213 | ||
27d340c7 | 214 | log_set_target(LOG_TARGET_AUTO); |
3d20ed6d LP |
215 | log_parse_environment(); |
216 | log_open(); | |
217 | ||
4c12626c LP |
218 | umask(0022); |
219 | ||
b5884878 LP |
220 | q = parse_proc_cmdline(parse_proc_cmdline_item); |
221 | if (q < 0) | |
da927ba9 | 222 | log_warning_errno(q, "Failed to parse kernel command line, ignoring: %m"); |
b5884878 | 223 | |
3d20ed6d LP |
224 | test_files(); |
225 | ||
566690fd LP |
226 | if (!arg_force && arg_skip) { |
227 | r = 0; | |
228 | goto finish; | |
229 | } | |
a9e1f5ec | 230 | |
dc8e15c2 | 231 | if (argc > 1) { |
a9e1f5ec | 232 | device = argv[1]; |
dc8e15c2 | 233 | root_directory = false; |
94192cda ZJS |
234 | |
235 | if (stat(device, &st) < 0) { | |
566690fd LP |
236 | r = log_error_errno(errno, "Failed to stat '%s': %m", device); |
237 | goto finish; | |
94192cda ZJS |
238 | } |
239 | ||
9102fdc5 TG |
240 | r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev); |
241 | if (r < 0) { | |
242 | log_error_errno(r, "Failed to detect device %s: %m", device); | |
566690fd | 243 | goto finish; |
94192cda | 244 | } |
dc8e15c2 | 245 | } else { |
a84f5192 | 246 | struct timespec times[2]; |
3d20ed6d | 247 | |
a9e1f5ec LP |
248 | /* Find root device */ |
249 | ||
250 | if (stat("/", &st) < 0) { | |
566690fd LP |
251 | r = log_error_errno(errno, "Failed to stat() the root directory: %m"); |
252 | goto finish; | |
a9e1f5ec LP |
253 | } |
254 | ||
255 | /* Virtual root devices don't need an fsck */ | |
566690fd LP |
256 | if (major(st.st_dev) == 0) { |
257 | log_debug("Root directory is virtual, skipping check."); | |
258 | r = 0; | |
259 | goto finish; | |
260 | } | |
a9e1f5ec | 261 | |
a84f5192 KS |
262 | /* check if we are already writable */ |
263 | times[0] = st.st_atim; | |
264 | times[1] = st.st_mtim; | |
265 | if (utimensat(AT_FDCWD, "/", times, 0) == 0) { | |
cf1a1055 | 266 | log_info("Root directory is writable, skipping check."); |
566690fd LP |
267 | r = 0; |
268 | goto finish; | |
a84f5192 KS |
269 | } |
270 | ||
9102fdc5 TG |
271 | r = sd_device_new_from_devnum(&dev, 'b', st.st_dev); |
272 | if (r < 0) { | |
273 | log_error_errno(r, "Failed to detect root device: %m"); | |
566690fd | 274 | goto finish; |
a9e1f5ec LP |
275 | } |
276 | ||
9102fdc5 TG |
277 | r = sd_device_get_devname(dev, &device); |
278 | if (r < 0) { | |
279 | log_error_errno(r, "Failed to detect device node of root directory: %m"); | |
566690fd LP |
280 | r = -ENXIO; |
281 | goto finish; | |
3e33a44a | 282 | } |
dc8e15c2 LP |
283 | |
284 | root_directory = true; | |
3d20ed6d LP |
285 | } |
286 | ||
9102fdc5 TG |
287 | r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type); |
288 | if (r >= 0) { | |
eb66db55 | 289 | r = fsck_exists(type); |
571d0134 LP |
290 | if (r == -ENOENT) { |
291 | log_info("fsck.%s doesn't exist, not checking file system on %s", type, device); | |
566690fd LP |
292 | r = 0; |
293 | goto finish; | |
571d0134 | 294 | } else if (r < 0) |
da927ba9 | 295 | log_warning_errno(r, "fsck.%s cannot be used for %s: %m", type, device); |
94192cda ZJS |
296 | } |
297 | ||
19e887e7 | 298 | if (pipe(progress_pipe) < 0) { |
566690fd LP |
299 | r = log_error_errno(errno, "pipe(): %m"); |
300 | goto finish; | |
19e887e7 | 301 | } |
27d340c7 | 302 | |
3d20ed6d | 303 | cmdline[i++] = "/sbin/fsck"; |
f1f0198c | 304 | cmdline[i++] = arg_repair; |
3d20ed6d | 305 | cmdline[i++] = "-T"; |
c343be28 KS |
306 | |
307 | /* | |
48d3e8d0 KZ |
308 | * Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files. |
309 | * The previous versions use flock for the device and conflict with | |
310 | * udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5 | |
c343be28 | 311 | */ |
48d3e8d0 | 312 | cmdline[i++] = "-l"; |
dc8e15c2 LP |
313 | |
314 | if (!root_directory) | |
315 | cmdline[i++] = "-M"; | |
3d20ed6d LP |
316 | |
317 | if (arg_force) | |
318 | cmdline[i++] = "-f"; | |
319 | ||
576a13ea ZJS |
320 | xsprintf(dash_c, "-C%i", progress_pipe[1]); |
321 | cmdline[i++] = dash_c; | |
27d340c7 | 322 | |
a9e1f5ec | 323 | cmdline[i++] = device; |
3d20ed6d LP |
324 | cmdline[i++] = NULL; |
325 | ||
27d340c7 LP |
326 | pid = fork(); |
327 | if (pid < 0) { | |
566690fd | 328 | r = log_error_errno(errno, "fork(): %m"); |
3d20ed6d LP |
329 | goto finish; |
330 | } else if (pid == 0) { | |
331 | /* Child */ | |
1952708a | 332 | progress_pipe[0] = safe_close(progress_pipe[0]); |
3d20ed6d LP |
333 | execv(cmdline[0], (char**) cmdline); |
334 | _exit(8); /* Operational error */ | |
335 | } | |
336 | ||
03e334a1 | 337 | progress_pipe[1] = safe_close(progress_pipe[1]); |
27d340c7 | 338 | |
576a13ea ZJS |
339 | progress_rc = process_progress(progress_pipe[0], pid, st.st_rdev); |
340 | progress_pipe[0] = -1; | |
27d340c7 | 341 | |
566690fd LP |
342 | r = wait_for_terminate(pid, &status); |
343 | if (r < 0) { | |
344 | log_error_errno(r, "waitid(): %m"); | |
3d20ed6d LP |
345 | goto finish; |
346 | } | |
347 | ||
07f9a21b | 348 | if (status.si_code != CLD_EXITED || (status.si_status & ~1) || progress_rc != 0) { |
3d20ed6d | 349 | |
07f9a21b DR |
350 | /* cancel will kill fsck (but process_progress returns 0) */ |
351 | if ((progress_rc != 0 && status.si_code == CLD_KILLED) || status.si_code == CLD_DUMPED) | |
a9e1f5ec LP |
352 | log_error("fsck terminated by signal %s.", signal_to_string(status.si_status)); |
353 | else if (status.si_code == CLD_EXITED) | |
354 | log_error("fsck failed with error code %i.", status.si_status); | |
07f9a21b | 355 | else if (progress_rc != 0) |
a9e1f5ec | 356 | log_error("fsck failed due to unknown reason."); |
3d20ed6d | 357 | |
566690fd LP |
358 | r = -EINVAL; |
359 | ||
a4c24ff7 | 360 | if (status.si_code == CLD_EXITED && (status.si_status & 2) && root_directory) |
3d20ed6d | 361 | /* System should be rebooted. */ |
80cfe9e1 | 362 | start_target(SPECIAL_REBOOT_TARGET); |
a4c24ff7 | 363 | else if (status.si_code == CLD_EXITED && (status.si_status & 6)) |
3d20ed6d | 364 | /* Some other problem */ |
80cfe9e1 | 365 | start_target(SPECIAL_EMERGENCY_TARGET); |
a4c24ff7 | 366 | else { |
566690fd | 367 | r = 0; |
07f9a21b DR |
368 | if (progress_rc != 0) |
369 | log_warning("Ignoring error."); | |
a4c24ff7 | 370 | } |
3d20ed6d LP |
371 | |
372 | } else | |
566690fd | 373 | r = 0; |
3d20ed6d | 374 | |
a9e1f5ec | 375 | if (status.si_code == CLD_EXITED && (status.si_status & 1)) |
2b583ce6 | 376 | touch("/run/systemd/quotacheck"); |
3d20ed6d LP |
377 | |
378 | finish: | |
566690fd | 379 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
3d20ed6d | 380 | } |