/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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 <stdio.h> #include <stdbool.h> #include <errno.h> #include <unistd.h> #include <fcntl.h> #include <sys/file.h> #include <sys/stat.h> #include <sys/prctl.h> #include "sd-bus.h" #include "sd-device.h" #include "util.h" #include "process-util.h" #include "signal-util.h" #include "special.h" #include "bus-util.h" #include "bus-error.h" #include "bus-common-errors.h" #include "device-util.h" #include "path-util.h" #include "socket-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) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_bus_close_unref_ sd_bus *bus = NULL; int r; assert(target); r = bus_open_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, "replace"); /* 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) { int r; assert(key); if (streq(key, "fsck.mode") && value) { 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") && value) { 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, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 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_device_unref_ 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 = parse_proc_cmdline(parse_proc_cmdline_item); 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 == -ENOENT) { log_info("fsck.%s doesn't exist, not checking file system on %s", type, device); r = 0; goto finish; } else if (r < 0) log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s: %m", type, device); } 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 */ reset_all_signal_handlers(); 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); 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); 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; }