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|
/*-*- 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 "sd-bus.h"
#include "sd-device.h"
#include "util.h"
#include "process-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"
#include "fsckd/fsckd.h"
static bool arg_skip = false;
static bool arg_force = 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
}
static int process_progress(int fd, pid_t fsck_pid, dev_t device_num) {
_cleanup_fclose_ FILE *f = NULL;
usec_t last = 0;
_cleanup_close_ int fsckd_fd = -1;
static const union sockaddr_union sa = {
.un.sun_family = AF_UNIX,
.un.sun_path = FSCKD_SOCKET_PATH,
};
fsckd_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
if (fsckd_fd < 0)
return log_warning_errno(errno, "Cannot open fsckd socket, we won't report fsck progress: %m");
if (connect(fsckd_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0)
return log_warning_errno(errno, "Cannot connect to fsckd socket, we won't report fsck progress: %m");
f = fdopen(fd, "r");
if (!f)
return log_warning_errno(errno, "Cannot connect to fsck, we won't report fsck progress: %m");
while (!feof(f)) {
int pass;
size_t buflen;
size_t cur, max;
ssize_t r;
usec_t t;
_cleanup_free_ char *device = NULL;
FsckProgress progress;
FsckdMessage fsckd_message;
if (fscanf(f, "%i %zu %zu %ms", &pass, &cur, &max, &device) != 4)
break;
/* Only update once every 50ms */
t = now(CLOCK_MONOTONIC);
if (last + 50 * USEC_PER_MSEC > t)
continue;
last = t;
/* send progress to fsckd */
progress.devnum = device_num;
progress.cur = cur;
progress.max = max;
progress.pass = pass;
r = send(fsckd_fd, &progress, sizeof(FsckProgress), 0);
if (r < 0 || (size_t) r < sizeof(FsckProgress))
log_warning_errno(errno, "Cannot communicate fsck progress to fsckd: %m");
/* get fsckd requests, only read when we have coherent size data */
r = ioctl(fsckd_fd, FIONREAD, &buflen);
if (r == 0 && (size_t) buflen >= sizeof(FsckdMessage)) {
r = recv(fsckd_fd, &fsckd_message, sizeof(FsckdMessage), 0);
if (r > 0 && fsckd_message.cancel == 1) {
log_info("Request to cancel fsck from fsckd");
kill(fsck_pid, SIGTERM);
}
}
}
return 0;
}
int main(int argc, char *argv[]) {
const char *cmdline[9];
int i = 0, r = EXIT_FAILURE, q;
pid_t pid;
int progress_rc;
siginfo_t status;
_cleanup_device_unref_ sd_device *dev = NULL;
const char *device, *type;
bool root_directory;
_cleanup_close_pair_ int progress_pipe[2] = { -1, -1 };
char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1];
struct stat st;
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 (pipe(progress_pipe) < 0) {
r = log_error_errno(errno, "pipe(): %m");
goto finish;
}
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";
xsprintf(dash_c, "-C%i", progress_pipe[1]);
cmdline[i++] = dash_c;
cmdline[i++] = device;
cmdline[i++] = NULL;
pid = fork();
if (pid < 0) {
r = log_error_errno(errno, "fork(): %m");
goto finish;
} else if (pid == 0) {
/* Child */
progress_pipe[0] = safe_close(progress_pipe[0]);
execv(cmdline[0], (char**) cmdline);
_exit(8); /* Operational error */
}
progress_pipe[1] = safe_close(progress_pipe[1]);
progress_rc = process_progress(progress_pipe[0], pid, st.st_rdev);
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) || progress_rc != 0) {
/* cancel will kill fsck (but process_progress returns 0) */
if ((progress_rc != 0 && 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 if (progress_rc != 0)
log_error("fsck failed due to unknown reason.");
r = -EINVAL;
if (status.si_code == CLD_EXITED && (status.si_status & 2) && root_directory)
/* System should be rebooted. */
start_target(SPECIAL_REBOOT_TARGET);
else if (status.si_code == CLD_EXITED && (status.si_status & 6))
/* Some other problem */
start_target(SPECIAL_EMERGENCY_TARGET);
else {
r = 0;
if (progress_rc != 0)
log_warning("Ignoring error.");
}
} else
r = 0;
if (status.si_code == CLD_EXITED && (status.si_status & 1))
(void) touch("/run/systemd/quotacheck");
finish:
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|