diff options
Diffstat (limited to 'src/grp-initprogs/systemd-fsck')
| -rw-r--r-- | src/grp-initprogs/systemd-fsck/Makefile | 33 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-fsck/fsck.c | 487 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-fsck/systemd-fsck@.service.in | 20 | ||||
| -rw-r--r-- | src/grp-initprogs/systemd-fsck/systemd-fsck@.service.xml | 139 |
4 files changed, 679 insertions, 0 deletions
diff --git a/src/grp-initprogs/systemd-fsck/Makefile b/src/grp-initprogs/systemd-fsck/Makefile new file mode 100644 index 0000000000..8a223a7f70 --- /dev/null +++ b/src/grp-initprogs/systemd-fsck/Makefile @@ -0,0 +1,33 @@ +# -*- Mode: makefile; indent-tabs-mode: t -*- +# +# This file is part of systemd. +# +# Copyright 2010-2012 Lennart Poettering +# Copyright 2010-2012 Kay Sievers +# Copyright 2013 Zbigniew Jędrzejewski-Szmek +# Copyright 2013 David Strauss +# Copyright 2016 Luke Shumaker +# +# 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 $(dir $(lastword $(MAKEFILE_LIST)))/../../../config.mk +include $(topsrcdir)/build-aux/Makefile.head.mk + +rootlibexec_PROGRAMS += systemd-fsck +systemd_fsck_SOURCES = \ + src/fsck/fsck.c + +systemd_fsck_LDADD = \ + libsystemd-shared.la + +include $(topsrcdir)/build-aux/Makefile.tail.mk diff --git a/src/grp-initprogs/systemd-fsck/fsck.c b/src/grp-initprogs/systemd-fsck/fsck.c new file mode 100644 index 0000000000..c33d199ef5 --- /dev/null +++ b/src/grp-initprogs/systemd-fsck/fsck.c @@ -0,0 +1,487 @@ +/*** + 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 <systemd/sd-bus.h> + +#include "sd-bus/bus-common-errors.h" +#include "sd-bus/bus-error.h" +#include "sd-bus/bus-util.h" +#include "sd-device/device-util.h" +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/fd-util.h" +#include "systemd-basic/fs-util.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/path-util.h" +#include "systemd-basic/proc-cmdline.h" +#include "systemd-basic/process-util.h" +#include "systemd-basic/signal-util.h" +#include "systemd-basic/socket-util.h" +#include "systemd-basic/special.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/util.h" +#include "systemd-staging/sd-device.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) { + 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, 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 = 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 < 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; +} diff --git a/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.in b/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.in new file mode 100644 index 0000000000..6ca6b07e9e --- /dev/null +++ b/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.in @@ -0,0 +1,20 @@ +# This file is part of systemd. +# +# 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. + +[Unit] +Description=File System Check on %f +Documentation=man:systemd-fsck@.service(8) +DefaultDependencies=no +BindsTo=%i.device +After=%i.device systemd-fsck-root.service local-fs-pre.target +Before=systemd-quotacheck.service shutdown.target + +[Service] +Type=oneshot +RemainAfterExit=yes +ExecStart=@rootlibexecdir@/systemd-fsck %f +TimeoutSec=0 diff --git a/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.xml b/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.xml new file mode 100644 index 0000000000..933c3247ad --- /dev/null +++ b/src/grp-initprogs/systemd-fsck/systemd-fsck@.service.xml @@ -0,0 +1,139 @@ +<?xml version="1.0"?> +<!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + 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/>. +--> +<refentry id="systemd-fsck@.service"> + + <refentryinfo> + <title>systemd-fsck@.service</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-fsck@.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-fsck@.service</refname> + <refname>systemd-fsck-root.service</refname> + <refname>systemd-fsck</refname> + <refpurpose>File system checker logic</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-fsck@.service</filename></para> + <para><filename>systemd-fsck-root.service</filename></para> + <para><filename>/usr/lib/systemd/systemd-fsck</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><filename>systemd-fsck@.service</filename> and + <filename>systemd-fsck-root.service</filename> are services + responsible for file system checks. They are instantiated for each + device that is configured for file system checking. + <filename>systemd-fsck-root.service</filename> is responsible for + file system checks on the root file system, but only if the + root filesystem was not checked in the initramfs. + <filename>systemd-fsck@.service</filename> is used for all other + file systems and for the root file system in the initramfs.</para> + + <para>These services are started at boot if + <option>passno</option> in <filename>/etc/fstab</filename> for the + file system is set to a value greater than zero. The file system + check for root is performed before the other file systems. Other + file systems may be checked in parallel, except when they are on + the same rotating disk.</para> + + <para><filename>systemd-fsck</filename> does not know any details + about specific filesystems, and simply executes file system + checkers specific to each filesystem type + (<filename>/sbin/fsck.*</filename>). This helper will decide if + the filesystem should actually be checked based on the time since + last check, number of mounts, unclean unmount, etc.</para> + + <para>If a file system check fails for a service without + <option>nofail</option>, emergency mode is activated, by isolating + to <filename>emergency.target</filename>.</para> + </refsect1> + + <refsect1> + <title>Kernel Command Line</title> + + <para><filename>systemd-fsck</filename> understands one kernel + command line parameter:</para> + + <variablelist class='kernel-commandline-options'> + <varlistentry> + <term><varname>fsck.mode=</varname></term> + + <listitem><para>One of <literal>auto</literal>, + <literal>force</literal>, <literal>skip</literal>. Controls + the mode of operation. The default is <literal>auto</literal>, + and ensures that file system checks are done when the file + system checker deems them necessary. <literal>force</literal> + unconditionally results in full file system checks. + <literal>skip</literal> skips any file system + checks.</para></listitem> + </varlistentry> + + <varlistentry> + <term><varname>fsck.repair=</varname></term> + + <listitem><para>One of <literal>preen</literal>, + <literal>yes</literal>, <literal>no</literal>. Controls the + mode of operation. The default is <literal> preen</literal>, + and will automatically repair problems that can be safely + fixed. <literal>yes </literal> will answer yes to all + questions by fsck and <literal>no</literal> will answer no to + all questions. </para></listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-quotacheck.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.btrfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.cramfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.ext4</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.fat</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.hfsplus</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.minix</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.ntfs</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>fsck.xfs</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |