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/* SPDX-License-Identifier: LGPL-2.1+ */
/***
Copyright © 2014 Holger Hans Peter Freyther
***/
#include <errno.h>
#include <fcntl.h>
#include <stdbool.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 "fsck-util.h"
#include "main-func.h"
#include "parse-util.h"
#include "path-util.h"
#include "proc-cmdline.h"
#include "process-util.h"
#include "rlimit-util.h"
#include "signal-util.h"
#include "socket-util.h"
#include "special.h"
#include "stdio-util.h"
#include "util.h"
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);
}
}
#if 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) {
#if 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, FILE* console) {
_cleanup_fclose_ FILE *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, "r");
if (!f) {
safe_close(fd);
return log_debug_errno(errno, "Failed to use pipe: %m");
}
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
r = log_warning_errno(SYNTHETIC_ERRNO(errno), "Failed to parse progress pipe data");
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",
};
_cleanup_close_ int fd = -1;
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)
return log_full_errno(IN_SET(errno, ECONNREFUSED, ENOENT) ? LOG_DEBUG : LOG_WARNING,
errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path);
return TAKE_FD(fd);
}
static int run(int argc, char *argv[]) {
_cleanup_close_pair_ int progress_pipe[2] = { -1, -1 };
_cleanup_(sd_device_unrefp) sd_device *dev = NULL;
_cleanup_free_ char *dpath = NULL;
_cleanup_fclose_ FILE *console = NULL;
const char *device, *type;
bool root_directory;
struct stat st;
int r, exit_status;
pid_t pid;
log_setup_service();
if (argc > 2) {
log_error("This program expects one or no arguments.");
return -EINVAL;
}
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)
return 0;
if (argc > 1) {
dpath = strdup(argv[1]);
if (!dpath)
return log_oom();
device = dpath;
if (stat(device, &st) < 0)
return log_error_errno(errno, "Failed to stat %s: %m", device);
if (!S_ISBLK(st.st_mode)) {
log_error("%s is not a block device.", device);
return -EINVAL;
}
r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev);
if (r < 0)
return log_error_errno(r, "Failed to detect device %s: %m", device);
root_directory = false;
} else {
struct timespec times[2];
/* Find root device */
if (stat("/", &st) < 0)
return log_error_errno(errno, "Failed to stat() the root directory: %m");
/* Virtual root devices don't need an fsck */
if (major(st.st_dev) == 0) {
log_debug("Root directory is virtual or btrfs, skipping check.");
return 0;
}
/* 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.");
return 0;
}
r = sd_device_new_from_devnum(&dev, 'b', st.st_dev);
if (r < 0)
return log_error_errno(r, "Failed to detect root device: %m");
r = sd_device_get_devname(dev, &device);
if (r < 0)
return log_device_error_errno(dev, r, "Failed to detect device node of root directory: %m");
root_directory = true;
}
if (sd_device_get_property_value(dev, "ID_FS_TYPE", &type) >= 0) {
r = fsck_exists(type);
if (r < 0)
log_device_warning_errno(dev, r, "Couldn't detect if fsck.%s may be used, proceeding: %m", type);
else if (r == 0) {
log_device_info(dev, "fsck.%s doesn't exist, not checking file system.", type);
return 0;
}
}
console = fopen("/dev/console", "we");
if (console &&
arg_show_progress &&
pipe(progress_pipe) < 0)
return log_error_errno(errno, "pipe(): %m");
r = safe_fork("(fsck)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_LOG, &pid);
if (r < 0)
return r;
if (r == 0) {
char dash_c[STRLEN("-C") + DECIMAL_STR_MAX(int) + 1];
int progress_socket = -1;
const char *cmdline[9];
int i = 0;
/* Child */
/* 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;
(void) rlimit_nofile_safe();
execv(cmdline[0], (char**) cmdline);
_exit(FSCK_OPERATIONAL_ERROR);
}
if (console) {
progress_pipe[1] = safe_close(progress_pipe[1]);
(void) process_progress(TAKE_FD(progress_pipe[0]), console);
}
exit_status = wait_for_terminate_and_check("fsck", pid, WAIT_LOG_ABNORMAL);
if (exit_status < 0)
return exit_status;
if ((exit_status & ~FSCK_ERROR_CORRECTED) != FSCK_SUCCESS) {
log_error("fsck failed with exit status %i.", exit_status);
if ((exit_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory) {
/* System should be rebooted. */
start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly");
return -EINVAL;
} else if (exit_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED))
/* Some other problem */
start_target(SPECIAL_EMERGENCY_TARGET, "replace");
else
log_warning("Ignoring error.");
}
if (exit_status & FSCK_ERROR_CORRECTED)
(void) touch("/run/systemd/quotacheck");
return !!(exit_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED));
}
DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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