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Diffstat (limited to 'src/grp-initprogs/systemd-fsck/fsck.c')
-rw-r--r--src/grp-initprogs/systemd-fsck/fsck.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/src/grp-initprogs/systemd-fsck/fsck.c b/src/grp-initprogs/systemd-fsck/fsck.c
new file mode 100644
index 0000000000..df6f96096b
--- /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, void *data) {
+ 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, NULL, true);
+ 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 13:47:49 +0000