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-rw-r--r--src/fsck/fsck.c420
1 files changed, 420 insertions, 0 deletions
diff --git a/src/fsck/fsck.c b/src/fsck/fsck.c
new file mode 100644
index 0000000..000ed69
--- /dev/null
+++ b/src/fsck/fsck.c
@@ -0,0 +1,420 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ 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-locator.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 "signal-util.h"
+#include "socket-util.h"
+#include "special.h"
+#include "stdio-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("Requesting %s/start/%s", target, mode);
+
+ /* Start this unit only if we can replace basic.target with it */
+ r = bus_call_method(bus, bus_systemd_mgr, "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;
+ 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);
+ r = fprintf(console, "\r%s: fsck %3.1f%% complete...\r", device, p);
+ if (r < 0)
+ return -EIO; /* No point in continuing if something happened to our output stream */
+
+ fflush(console);
+ clear = MAX(clear, r);
+ }
+
+ if (clear > 0) {
+ fputc('\r', console);
+ for (int j = 0; j < clear; j++)
+ fputc(' ', console);
+ fputc('\r', console);
+ fflush(console);
+ }
+
+ return r;
+}
+
+static int fsck_progress_socket(void) {
+ _cleanup_close_ int fd = -EBADF;
+ int r;
+
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd < 0)
+ return log_warning_errno(errno, "socket(): %m");
+
+ r = connect_unix_path(fd, AT_FDCWD, "/run/systemd/fsck.progress");
+ if (r < 0)
+ return log_full_errno(IN_SET(r, -ECONNREFUSED, -ENOENT) ? LOG_DEBUG : LOG_WARNING,
+ r, "Failed to connect to progress socket, ignoring: %m");
+
+ return TAKE_FD(fd);
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_close_pair_ int progress_pipe[2] = EBADF_PAIR;
+ _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();
+
+ if (argc > 2)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "This program expects one or no arguments.");
+
+ 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))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s is not a block device.",
+ device);
+
+ r = sd_device_new_from_stat_rdev(&dev, &st);
+ 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_for_fstype(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;
+ }
+ } else {
+ r = fsck_exists();
+ if (r < 0)
+ log_device_warning_errno(dev, r, "Couldn't detect if the fsck command may be used, proceeding: %m");
+ else if (r == 0) {
+ log_device_info(dev, "The fsck command does not exist, not checking file system.");
+ 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_SIGTERM|FORK_LOG|FORK_RLIMIT_NOFILE_SAFE, &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++] = "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;
+
+ execvp(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)))
+ 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 07:24:23 +0000