#include <sys/reboot.h>
#include <linux/reboot.h>
#include <sys/wait.h>
-#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/syscall.h>
#include "missing.h"
#include "log.h"
+#include "fileio.h"
#include "umount.h"
#include "util.h"
#include "mkdir.h"
#include "virt.h"
#include "watchdog.h"
#include "killall.h"
+#include "cgroup-util.h"
+#include "def.h"
#define FINALIZE_ATTEMPTS 50
}
int main(int argc, char *argv[]) {
- int cmd, r;
- unsigned retries;
bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
bool in_container, use_watchdog = false;
+ _cleanup_free_ char *line = NULL, *cgroup = NULL;
char *arguments[3];
+ unsigned retries;
+ int cmd, r;
+
+ /* suppress shutdown status output if 'quiet' is used */
+ r = proc_cmdline(&line);
+ if (r > 0) {
+ char *w, *state;
+ size_t l;
+
+ FOREACH_WORD_QUOTED(w, l, line, state) {
+ if (l == 5 && memcmp(w, "quiet", 5) == 0) {
+ log_set_max_level(LOG_WARNING);
+ break;
+ }
+ }
+ }
log_parse_environment();
log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
+ log_close_console(); /* force reopen of /dev/console */
log_open();
umask(0022);
goto error;
}
+ cg_get_root_path(&cgroup);
+
use_watchdog = !!getenv("WATCHDOG_USEC");
/* lock us into memory */
mlockall(MCL_CURRENT|MCL_FUTURE);
log_info("Sending SIGTERM to remaining processes...");
- broadcast_signal(SIGTERM, true);
+ broadcast_signal(SIGTERM, true, true);
log_info("Sending SIGKILL to remaining processes...");
- broadcast_signal(SIGKILL, true);
+ broadcast_signal(SIGKILL, true, false);
if (in_container) {
need_swapoff = false;
if (use_watchdog)
watchdog_ping();
+ /* Let's trim the cgroup tree on each iteration so
+ that we leave an empty cgroup tree around, so that
+ container managers get a nice notify event when we
+ are down */
+ if (cgroup)
+ cg_trim(SYSTEMD_CGROUP_CONTROLLER, cgroup, false);
+
if (need_umount) {
log_info("Unmounting file systems.");
r = umount_all(&changed);
- if (r == 0)
+ if (r == 0) {
need_umount = false;
- else if (r > 0)
+ log_info("All filesystems unmounted.");
+ } else if (r > 0)
log_info("Not all file systems unmounted, %d left.", r);
else
log_error("Failed to unmount file systems: %s", strerror(-r));
}
if (need_swapoff) {
- log_info("Disabling swaps.");
+ log_info("Deactivating swaps.");
r = swapoff_all(&changed);
- if (r == 0)
+ if (r == 0) {
need_swapoff = false;
- else if (r > 0)
- log_info("Not all swaps are turned off, %d left.", r);
+ log_info("All swaps deactivated.");
+ } else if (r > 0)
+ log_info("Not all swaps deactivated, %d left.", r);
else
- log_error("Failed to turn off swaps: %s", strerror(-r));
+ log_error("Failed to deactivate swaps: %s", strerror(-r));
}
if (need_loop_detach) {
log_info("Detaching loop devices.");
r = loopback_detach_all(&changed);
- if (r == 0)
+ if (r == 0) {
need_loop_detach = false;
- else if (r > 0)
+ log_info("All loop devices detached.");
+ } else if (r > 0)
log_info("Not all loop devices detached, %d left.", r);
else
log_error("Failed to detach loop devices: %s", strerror(-r));
if (need_dm_detach) {
log_info("Detaching DM devices.");
r = dm_detach_all(&changed);
- if (r == 0)
+ if (r == 0) {
need_dm_detach = false;
- else if (r > 0)
- log_warning("Not all DM devices detached, %d left.", r);
+ log_info("All DM devices detached.");
+ } else if (r > 0)
+ log_info("Not all DM devices detached, %d left.", r);
else
log_error("Failed to detach DM devices: %s", strerror(-r));
}
if (retries >= FINALIZE_ATTEMPTS)
log_error("Too many iterations, giving up.");
+ else
+ log_info("Storage is finalized.");
arguments[0] = NULL;
arguments[1] = argv[1];
arguments[2] = NULL;
execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, arguments);
- if (!in_container &&
+ if (!in_container && !in_initrd() &&
access("/run/initramfs/shutdown", X_OK) == 0) {
if (prepare_new_root() >= 0 &&
pivot_to_new_root() >= 0) {
+
+ log_info("Returning to initrd...");
+
execv("/shutdown", argv);
log_error("Failed to execute shutdown binary: %m");
}
}
- if (cmd == LINUX_REBOOT_CMD_KEXEC) {
+ /* The kernel will automaticall flush ATA disks and suchlike
+ * on reboot(), but the file systems need to be synce'd
+ * explicitly in advance. So let's do this here, but not
+ * needlessly slow down containers. */
+ if (!in_container)
+ sync();
+
+ switch (cmd) {
+
+ case LINUX_REBOOT_CMD_KEXEC:
if (!in_container) {
/* We cheat and exec kexec to avoid doing all its work */
- pid_t pid = fork();
+ pid_t pid;
+
+ log_info("Rebooting with kexec.");
+ pid = fork();
if (pid < 0)
- log_error("Could not fork: %m. Falling back to normal reboot.");
- else if (pid > 0) {
- wait_for_terminate_and_warn("kexec", pid);
- log_warning("kexec failed. Falling back to normal reboot.");
- } else {
+ log_error("Failed to fork: %m");
+ else if (pid == 0) {
+
+ const char * const args[] = {
+ KEXEC, "-e", NULL
+ };
+
/* Child */
- const char *args[3] = { "/sbin/kexec", "-e", NULL };
+
execv(args[0], (char * const *) args);
- return EXIT_FAILURE;
- }
+ _exit(EXIT_FAILURE);
+ } else
+ wait_for_terminate_and_warn("kexec", pid);
}
cmd = RB_AUTOBOOT;
+ /* Fall through */
+
+ case RB_AUTOBOOT:
+
+ if (!in_container) {
+ _cleanup_free_ char *param = NULL;
+
+ if (read_one_line_file(REBOOT_PARAM_FILE, ¶m) >= 0) {
+ log_info("Rebooting with argument '%s'.", param);
+ syscall(SYS_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
+ LINUX_REBOOT_CMD_RESTART2, param);
+ }
+ }
+
+ log_info("Rebooting.");
+ break;
+
+ case RB_POWER_OFF:
+ log_info("Powering off.");
+ break;
+
+ case RB_HALT_SYSTEM:
+ log_info("Halting system.");
+ break;
+
+ default:
+ assert_not_reached("Unknown magic");
}
reboot(cmd);
-
if (errno == EPERM && in_container) {
/* If we are in a container, and we lacked
* CAP_SYS_BOOT just exit, this will kill our
* container for good. */
- log_error("Exiting container.");
+ log_info("Exiting container.");
exit(0);
}