| /*** |
| This file is part of systemd. |
| |
| Copyright 2010 Lennart Poettering |
| Copyright 2014 Holger Hans Peter Freyther |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <sys/file.h> |
| #include <sys/prctl.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #include "sd-bus.h" |
| #include "sd-device.h" |
| |
| #include "alloc-util.h" |
| #include "bus-common-errors.h" |
| #include "bus-error.h" |
| #include "bus-util.h" |
| #include "device-util.h" |
| #include "fd-util.h" |
| #include "fs-util.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "proc-cmdline.h" |
| #include "process-util.h" |
| #include "signal-util.h" |
| #include "socket-util.h" |
| #include "special.h" |
| #include "stdio-util.h" |
| #include "util.h" |
| |
| /* exit codes as defined in fsck(8) */ |
| enum { |
| FSCK_SUCCESS = 0, |
| FSCK_ERROR_CORRECTED = 1, |
| FSCK_SYSTEM_SHOULD_REBOOT = 2, |
| FSCK_ERRORS_LEFT_UNCORRECTED = 4, |
| FSCK_OPERATIONAL_ERROR = 8, |
| FSCK_USAGE_OR_SYNTAX_ERROR = 16, |
| FSCK_USER_CANCELLED = 32, |
| FSCK_SHARED_LIB_ERROR = 128, |
| }; |
| |
| static bool arg_skip = false; |
| static bool arg_force = false; |
| static bool arg_show_progress = false; |
| static const char *arg_repair = "-a"; |
| |
| static void start_target(const char *target, const char *mode) { |
| _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; |
| int r; |
| |
| assert(target); |
| |
| r = bus_connect_system_systemd(&bus); |
| if (r < 0) { |
| log_error_errno(r, "Failed to get D-Bus connection: %m"); |
| return; |
| } |
| |
| log_info("Running request %s/start/replace", target); |
| |
| /* Start these units only if we can replace base.target with it */ |
| r = sd_bus_call_method(bus, |
| "org.freedesktop.systemd1", |
| "/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "StartUnitReplace", |
| &error, |
| NULL, |
| "sss", "basic.target", target, mode); |
| |
| /* Don't print a warning if we aren't called during startup */ |
| if (r < 0 && !sd_bus_error_has_name(&error, BUS_ERROR_NO_SUCH_JOB)) |
| log_error("Failed to start unit: %s", bus_error_message(&error, r)); |
| } |
| |
| static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
| int r; |
| |
| assert(key); |
| |
| if (streq(key, "fsck.mode")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| if (streq(value, "auto")) |
| arg_force = arg_skip = false; |
| else if (streq(value, "force")) |
| arg_force = true; |
| else if (streq(value, "skip")) |
| arg_skip = true; |
| else |
| log_warning("Invalid fsck.mode= parameter '%s'. Ignoring.", value); |
| |
| } else if (streq(key, "fsck.repair")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| if (streq(value, "preen")) |
| arg_repair = "-a"; |
| else { |
| r = parse_boolean(value); |
| if (r > 0) |
| arg_repair = "-y"; |
| else if (r == 0) |
| arg_repair = "-n"; |
| else |
| log_warning("Invalid fsck.repair= parameter '%s'. Ignoring.", value); |
| } |
| } |
| |
| #ifdef HAVE_SYSV_COMPAT |
| else if (streq(key, "fastboot") && !value) { |
| log_warning("Please pass 'fsck.mode=skip' rather than 'fastboot' on the kernel command line."); |
| arg_skip = true; |
| |
| } else if (streq(key, "forcefsck") && !value) { |
| log_warning("Please pass 'fsck.mode=force' rather than 'forcefsck' on the kernel command line."); |
| arg_force = true; |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static void test_files(void) { |
| |
| #ifdef HAVE_SYSV_COMPAT |
| if (access("/fastboot", F_OK) >= 0) { |
| log_error("Please pass 'fsck.mode=skip' on the kernel command line rather than creating /fastboot on the root file system."); |
| arg_skip = true; |
| } |
| |
| if (access("/forcefsck", F_OK) >= 0) { |
| log_error("Please pass 'fsck.mode=force' on the kernel command line rather than creating /forcefsck on the root file system."); |
| arg_force = true; |
| } |
| #endif |
| |
| arg_show_progress = access("/run/systemd/show-status", F_OK) >= 0; |
| } |
| |
| static double percent(int pass, unsigned long cur, unsigned long max) { |
| /* Values stolen from e2fsck */ |
| |
| static const int pass_table[] = { |
| 0, 70, 90, 92, 95, 100 |
| }; |
| |
| if (pass <= 0) |
| return 0.0; |
| |
| if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0) |
| return 100.0; |
| |
| return (double) pass_table[pass-1] + |
| ((double) pass_table[pass] - (double) pass_table[pass-1]) * |
| (double) cur / (double) max; |
| } |
| |
| static int process_progress(int fd) { |
| _cleanup_fclose_ FILE *console = NULL, *f = NULL; |
| usec_t last = 0; |
| bool locked = false; |
| int clear = 0, r; |
| |
| /* No progress pipe to process? Then we are a NOP. */ |
| if (fd < 0) |
| return 0; |
| |
| f = fdopen(fd, "re"); |
| if (!f) { |
| safe_close(fd); |
| return -errno; |
| } |
| |
| console = fopen("/dev/console", "we"); |
| if (!console) |
| return -ENOMEM; |
| |
| for (;;) { |
| int pass, m; |
| unsigned long cur, max; |
| _cleanup_free_ char *device = NULL; |
| double p; |
| usec_t t; |
| |
| if (fscanf(f, "%i %lu %lu %ms", &pass, &cur, &max, &device) != 4) { |
| |
| if (ferror(f)) |
| r = log_warning_errno(errno, "Failed to read from progress pipe: %m"); |
| else if (feof(f)) |
| r = 0; |
| else { |
| log_warning("Failed to parse progress pipe data"); |
| r = -EBADMSG; |
| } |
| break; |
| } |
| |
| /* Only show one progress counter at max */ |
| if (!locked) { |
| if (flock(fileno(console), LOCK_EX|LOCK_NB) < 0) |
| continue; |
| |
| locked = true; |
| } |
| |
| /* Only update once every 50ms */ |
| t = now(CLOCK_MONOTONIC); |
| if (last + 50 * USEC_PER_MSEC > t) |
| continue; |
| |
| last = t; |
| |
| p = percent(pass, cur, max); |
| fprintf(console, "\r%s: fsck %3.1f%% complete...\r%n", device, p, &m); |
| fflush(console); |
| |
| if (m > clear) |
| clear = m; |
| } |
| |
| if (clear > 0) { |
| unsigned j; |
| |
| fputc('\r', console); |
| for (j = 0; j < (unsigned) clear; j++) |
| fputc(' ', console); |
| fputc('\r', console); |
| fflush(console); |
| } |
| |
| return r; |
| } |
| |
| static int fsck_progress_socket(void) { |
| static const union sockaddr_union sa = { |
| .un.sun_family = AF_UNIX, |
| .un.sun_path = "/run/systemd/fsck.progress", |
| }; |
| |
| int fd, r; |
| |
| fd = socket(AF_UNIX, SOCK_STREAM, 0); |
| if (fd < 0) |
| return log_warning_errno(errno, "socket(): %m"); |
| |
| if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) { |
| r = log_full_errno(errno == ECONNREFUSED || errno == ENOENT ? LOG_DEBUG : LOG_WARNING, |
| errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path); |
| safe_close(fd); |
| return r; |
| } |
| |
| return fd; |
| } |
| |
| int main(int argc, char *argv[]) { |
| _cleanup_close_pair_ int progress_pipe[2] = { -1, -1 }; |
| _cleanup_(sd_device_unrefp) sd_device *dev = NULL; |
| const char *device, *type; |
| bool root_directory; |
| siginfo_t status; |
| struct stat st; |
| int r; |
| pid_t pid; |
| |
| if (argc > 2) { |
| log_error("This program expects one or no arguments."); |
| return EXIT_FAILURE; |
| } |
| |
| log_set_target(LOG_TARGET_AUTO); |
| log_parse_environment(); |
| log_open(); |
| |
| umask(0022); |
| |
| r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
| if (r < 0) |
| log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
| |
| test_files(); |
| |
| if (!arg_force && arg_skip) { |
| r = 0; |
| goto finish; |
| } |
| |
| if (argc > 1) { |
| device = argv[1]; |
| |
| if (stat(device, &st) < 0) { |
| r = log_error_errno(errno, "Failed to stat %s: %m", device); |
| goto finish; |
| } |
| |
| if (!S_ISBLK(st.st_mode)) { |
| log_error("%s is not a block device.", device); |
| r = -EINVAL; |
| goto finish; |
| } |
| |
| r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev); |
| if (r < 0) { |
| log_error_errno(r, "Failed to detect device %s: %m", device); |
| goto finish; |
| } |
| |
| root_directory = false; |
| } else { |
| struct timespec times[2]; |
| |
| /* Find root device */ |
| |
| if (stat("/", &st) < 0) { |
| r = log_error_errno(errno, "Failed to stat() the root directory: %m"); |
| goto finish; |
| } |
| |
| /* Virtual root devices don't need an fsck */ |
| if (major(st.st_dev) == 0) { |
| log_debug("Root directory is virtual or btrfs, skipping check."); |
| r = 0; |
| goto finish; |
| } |
| |
| /* check if we are already writable */ |
| times[0] = st.st_atim; |
| times[1] = st.st_mtim; |
| |
| if (utimensat(AT_FDCWD, "/", times, 0) == 0) { |
| log_info("Root directory is writable, skipping check."); |
| r = 0; |
| goto finish; |
| } |
| |
| r = sd_device_new_from_devnum(&dev, 'b', st.st_dev); |
| if (r < 0) { |
| log_error_errno(r, "Failed to detect root device: %m"); |
| goto finish; |
| } |
| |
| r = sd_device_get_devname(dev, &device); |
| if (r < 0) { |
| log_error_errno(r, "Failed to detect device node of root directory: %m"); |
| goto finish; |
| } |
| |
| root_directory = true; |
| } |
| |
| r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type); |
| if (r >= 0) { |
| r = fsck_exists(type); |
| if (r < 0) |
| log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device); |
| else if (r == 0) { |
| log_info("fsck.%s doesn't exist, not checking file system on %s.", type, device); |
| goto finish; |
| } |
| } |
| |
| if (arg_show_progress) { |
| if (pipe(progress_pipe) < 0) { |
| r = log_error_errno(errno, "pipe(): %m"); |
| goto finish; |
| } |
| } |
| |
| pid = fork(); |
| if (pid < 0) { |
| r = log_error_errno(errno, "fork(): %m"); |
| goto finish; |
| } |
| if (pid == 0) { |
| char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1]; |
| int progress_socket = -1; |
| const char *cmdline[9]; |
| int i = 0; |
| |
| /* Child */ |
| |
| (void) reset_all_signal_handlers(); |
| (void) reset_signal_mask(); |
| assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); |
| |
| /* Close the reading side of the progress pipe */ |
| progress_pipe[0] = safe_close(progress_pipe[0]); |
| |
| /* Try to connect to a progress management daemon, if there is one */ |
| progress_socket = fsck_progress_socket(); |
| if (progress_socket >= 0) { |
| /* If this worked we close the progress pipe early, and just use the socket */ |
| progress_pipe[1] = safe_close(progress_pipe[1]); |
| xsprintf(dash_c, "-C%i", progress_socket); |
| } else if (progress_pipe[1] >= 0) { |
| /* Otherwise if we have the progress pipe to our own local handle, we use it */ |
| xsprintf(dash_c, "-C%i", progress_pipe[1]); |
| } else |
| dash_c[0] = 0; |
| |
| cmdline[i++] = "/sbin/fsck"; |
| cmdline[i++] = arg_repair; |
| cmdline[i++] = "-T"; |
| |
| /* |
| * Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files. |
| * The previous versions use flock for the device and conflict with |
| * udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5 |
| */ |
| cmdline[i++] = "-l"; |
| |
| if (!root_directory) |
| cmdline[i++] = "-M"; |
| |
| if (arg_force) |
| cmdline[i++] = "-f"; |
| |
| if (!isempty(dash_c)) |
| cmdline[i++] = dash_c; |
| |
| cmdline[i++] = device; |
| cmdline[i++] = NULL; |
| |
| execv(cmdline[0], (char**) cmdline); |
| _exit(FSCK_OPERATIONAL_ERROR); |
| } |
| |
| progress_pipe[1] = safe_close(progress_pipe[1]); |
| (void) process_progress(progress_pipe[0]); |
| progress_pipe[0] = -1; |
| |
| r = wait_for_terminate(pid, &status); |
| if (r < 0) { |
| log_error_errno(r, "waitid(): %m"); |
| goto finish; |
| } |
| |
| if (status.si_code != CLD_EXITED || (status.si_status & ~1)) { |
| |
| if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED) |
| log_error("fsck terminated by signal %s.", signal_to_string(status.si_status)); |
| else if (status.si_code == CLD_EXITED) |
| log_error("fsck failed with error code %i.", status.si_status); |
| else |
| log_error("fsck failed due to unknown reason."); |
| |
| r = -EINVAL; |
| |
| if (status.si_code == CLD_EXITED && (status.si_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory) |
| /* System should be rebooted. */ |
| start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly"); |
| else if (status.si_code == CLD_EXITED && (status.si_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED))) |
| /* Some other problem */ |
| start_target(SPECIAL_EMERGENCY_TARGET, "replace"); |
| else { |
| log_warning("Ignoring error."); |
| r = 0; |
| } |
| |
| } else |
| r = 0; |
| |
| if (status.si_code == CLD_EXITED && (status.si_status & FSCK_ERROR_CORRECTED)) |
| (void) touch("/run/systemd/quotacheck"); |
| |
| finish: |
| return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |