[systemd-commits] Makefile.am src/core src/shutdown.c src/umount.c src/umount.h
Lennart Poettering
lennart at kemper.freedesktop.org
Thu Apr 12 05:18:44 PDT 2012
Makefile.am | 6
src/core/shutdown.c | 492 +++++++++++++++++++++++++++++++++++++++
src/core/umount.c | 649 ++++++++++++++++++++++++++++++++++++++++++++++++++++
src/core/umount.h | 33 ++
src/shutdown.c | 492 ---------------------------------------
src/umount.c | 649 ----------------------------------------------------
src/umount.h | 33 --
7 files changed, 1177 insertions(+), 1177 deletions(-)
New commits:
commit 146de8175e11c877908f20f8ed1b5a3805455c0a
Author: Lennart Poettering <lennart at poettering.net>
Date: Thu Apr 12 14:18:36 2012 +0200
shutdown: move shutdown to core since it replaces PID 1
diff --git a/Makefile.am b/Makefile.am
index 829db7e..54cc509 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -946,9 +946,9 @@ pkginclude_HEADERS += \
# ------------------------------------------------------------------------------
systemd_shutdown_SOURCES = \
- src/umount.c \
- src/umount.h \
- src/shutdown.c
+ src/core/umount.c \
+ src/core/umount.h \
+ src/core/shutdown.c
systemd_shutdown_LDADD = \
libsystemd-label.la \
diff --git a/src/core/shutdown.c b/src/core/shutdown.c
new file mode 100644
index 0000000..cd478b0
--- /dev/null
+++ b/src/core/shutdown.c
@@ -0,0 +1,492 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 ProFUSION embedded systems
+
+ 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 <sys/mman.h>
+#include <sys/types.h>
+#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 <fcntl.h>
+#include <dirent.h>
+#include <errno.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "missing.h"
+#include "log.h"
+#include "umount.h"
+#include "util.h"
+#include "mkdir.h"
+#include "virt.h"
+#include "watchdog.h"
+
+#define TIMEOUT_USEC (5 * USEC_PER_SEC)
+#define FINALIZE_ATTEMPTS 50
+
+static bool ignore_proc(pid_t pid) {
+ char buf[PATH_MAX];
+ FILE *f;
+ char c;
+ size_t count;
+ uid_t uid;
+ int r;
+
+ /* We are PID 1, let's not commit suicide */
+ if (pid == 1)
+ return true;
+
+ r = get_process_uid(pid, &uid);
+ if (r < 0)
+ return true; /* not really, but better safe than sorry */
+
+ /* Non-root processes otherwise are always subject to be killed */
+ if (uid != 0)
+ return false;
+
+ snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long) pid);
+ char_array_0(buf);
+
+ f = fopen(buf, "re");
+ if (!f)
+ return true; /* not really, but has the desired effect */
+
+ count = fread(&c, 1, 1, f);
+ fclose(f);
+
+ /* Kernel threads have an empty cmdline */
+ if (count <= 0)
+ return true;
+
+ /* Processes with argv[0][0] = '@' we ignore from the killing
+ * spree.
+ *
+ * http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons */
+ if (count == 1 && c == '@')
+ return true;
+
+ return false;
+}
+
+static int killall(int sign) {
+ DIR *dir;
+ struct dirent *d;
+ unsigned int n_processes = 0;
+
+ dir = opendir("/proc");
+ if (!dir)
+ return -errno;
+
+ while ((d = readdir(dir))) {
+ pid_t pid;
+
+ if (parse_pid(d->d_name, &pid) < 0)
+ continue;
+
+ if (ignore_proc(pid))
+ continue;
+
+ if (kill(pid, sign) == 0)
+ n_processes++;
+ else
+ log_warning("Could not kill %d: %m", pid);
+ }
+
+ closedir(dir);
+
+ return n_processes;
+}
+
+static void wait_for_children(int n_processes, sigset_t *mask) {
+ usec_t until;
+
+ assert(mask);
+
+ until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
+ for (;;) {
+ struct timespec ts;
+ int k;
+ usec_t n;
+
+ for (;;) {
+ pid_t pid = waitpid(-1, NULL, WNOHANG);
+
+ if (pid == 0)
+ break;
+
+ if (pid < 0 && errno == ECHILD)
+ return;
+
+ if (n_processes > 0)
+ if (--n_processes == 0)
+ return;
+ }
+
+ n = now(CLOCK_MONOTONIC);
+ if (n >= until)
+ return;
+
+ timespec_store(&ts, until - n);
+
+ if ((k = sigtimedwait(mask, NULL, &ts)) != SIGCHLD) {
+
+ if (k < 0 && errno != EAGAIN) {
+ log_error("sigtimedwait() failed: %m");
+ return;
+ }
+
+ if (k >= 0)
+ log_warning("sigtimedwait() returned unexpected signal.");
+ }
+ }
+}
+
+static void send_signal(int sign) {
+ sigset_t mask, oldmask;
+ int n_processes;
+
+ assert_se(sigemptyset(&mask) == 0);
+ assert_se(sigaddset(&mask, SIGCHLD) == 0);
+ assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
+
+ if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGSTOP) failed: %m");
+
+ n_processes = killall(sign);
+
+ if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGCONT) failed: %m");
+
+ if (n_processes <= 0)
+ goto finish;
+
+ wait_for_children(n_processes, &mask);
+
+finish:
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+}
+
+static void ultimate_send_signal(int sign) {
+ sigset_t mask, oldmask;
+ int r;
+
+ assert_se(sigemptyset(&mask) == 0);
+ assert_se(sigaddset(&mask, SIGCHLD) == 0);
+ assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
+
+ if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGSTOP) failed: %m");
+
+ r = kill(-1, sign);
+ if (r < 0 && errno != ESRCH)
+ log_warning("kill(-1, %s) failed: %m", signal_to_string(sign));
+
+ if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
+ log_warning("kill(-1, SIGCONT) failed: %m");
+
+ if (r < 0)
+ goto finish;
+
+ wait_for_children(0, &mask);
+
+finish:
+ sigprocmask(SIG_SETMASK, &oldmask, NULL);
+}
+
+static int prepare_new_root(void) {
+ static const char dirs[] =
+ "/run/initramfs/oldroot\0"
+ "/run/initramfs/proc\0"
+ "/run/initramfs/sys\0"
+ "/run/initramfs/dev\0"
+ "/run/initramfs/run\0";
+
+ const char *dir;
+
+ if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) {
+ log_error("Failed to mount bind /run/initramfs on /run/initramfs: %m");
+ return -errno;
+ }
+
+ if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) {
+ log_error("Failed to make /run/initramfs private mount: %m");
+ return -errno;
+ }
+
+ NULSTR_FOREACH(dir, dirs)
+ if (mkdir_p(dir, 0755) < 0 && errno != EEXIST) {
+ log_error("Failed to mkdir %s: %m", dir);
+ return -errno;
+ }
+
+ if (mount("/sys", "/run/initramfs/sys", NULL, MS_BIND, NULL) < 0) {
+ log_error("Failed to mount bind /sys on /run/initramfs/sys: %m");
+ return -errno;
+ }
+
+ if (mount("/proc", "/run/initramfs/proc", NULL, MS_BIND, NULL) < 0) {
+ log_error("Failed to mount bind /proc on /run/initramfs/proc: %m");
+ return -errno;
+ }
+
+ if (mount("/dev", "/run/initramfs/dev", NULL, MS_BIND, NULL) < 0) {
+ log_error("Failed to mount bind /dev on /run/initramfs/dev: %m");
+ return -errno;
+ }
+
+ if (mount("/run", "/run/initramfs/run", NULL, MS_BIND, NULL) < 0) {
+ log_error("Failed to mount bind /run on /run/initramfs/run: %m");
+ return -errno;
+ }
+
+ return 0;
+}
+
+static int pivot_to_new_root(void) {
+ int fd;
+
+ chdir("/run/initramfs");
+
+ /*
+ In case some evil process made "/" MS_SHARED
+ It works for pivot_root, but the ref count for the root device
+ is not decreasing :-/
+ */
+ if (mount(NULL, "/", NULL, MS_PRIVATE, NULL) < 0) {
+ log_error("Failed to make \"/\" private mount %m");
+ return -errno;
+ }
+
+ if (pivot_root(".", "oldroot") < 0) {
+ log_error("pivot failed: %m");
+ /* only chroot if pivot root succeded */
+ return -errno;
+ }
+
+ chroot(".");
+ log_info("Successfully changed into root pivot.");
+
+ fd = open("/dev/console", O_RDWR);
+ if (fd < 0)
+ log_error("Failed to open /dev/console: %m");
+ else {
+ make_stdio(fd);
+
+ /* Initialize the controlling terminal */
+ setsid();
+ ioctl(STDIN_FILENO, TIOCSCTTY, NULL);
+ }
+
+ return 0;
+}
+
+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 killed_everbody = false, in_container, use_watchdog = false;
+
+ log_parse_environment();
+ log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
+ log_open();
+
+ umask(0022);
+
+ if (getpid() != 1) {
+ log_error("Not executed by init (pid 1).");
+ r = -EPERM;
+ goto error;
+ }
+
+ if (argc != 2) {
+ log_error("Invalid number of arguments.");
+ r = -EINVAL;
+ goto error;
+ }
+
+ in_container = detect_container(NULL) > 0;
+
+ if (streq(argv[1], "reboot"))
+ cmd = RB_AUTOBOOT;
+ else if (streq(argv[1], "poweroff"))
+ cmd = RB_POWER_OFF;
+ else if (streq(argv[1], "halt"))
+ cmd = RB_HALT_SYSTEM;
+ else if (streq(argv[1], "kexec"))
+ cmd = LINUX_REBOOT_CMD_KEXEC;
+ else {
+ log_error("Unknown action '%s'.", argv[1]);
+ r = -EINVAL;
+ goto error;
+ }
+
+ use_watchdog = !!getenv("WATCHDOG_USEC");
+
+ /* lock us into memory */
+ if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0)
+ log_warning("Cannot lock process memory: %m");
+
+ log_info("Sending SIGTERM to remaining processes...");
+ send_signal(SIGTERM);
+
+ log_info("Sending SIGKILL to remaining processes...");
+ send_signal(SIGKILL);
+
+ if (in_container)
+ need_swapoff = false;
+
+ /* Unmount all mountpoints, swaps, and loopback devices */
+ for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
+ bool changed = false;
+
+ if (use_watchdog)
+ watchdog_ping();
+
+ if (need_umount) {
+ log_info("Unmounting file systems.");
+ r = umount_all(&changed);
+ if (r == 0)
+ need_umount = false;
+ 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.");
+ r = swapoff_all(&changed);
+ if (r == 0)
+ need_swapoff = false;
+ else if (r > 0)
+ log_info("Not all swaps are turned off, %d left.", r);
+ else
+ log_error("Failed to turn off swaps: %s", strerror(-r));
+ }
+
+ if (need_loop_detach) {
+ log_info("Detaching loop devices.");
+ r = loopback_detach_all(&changed);
+ if (r == 0)
+ need_loop_detach = false;
+ 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)
+ need_dm_detach = false;
+ else if (r > 0)
+ log_warning("Not all DM devices detached, %d left.", r);
+ else
+ log_error("Failed to detach DM devices: %s", strerror(-r));
+ }
+
+ if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) {
+ if (retries > 0)
+ log_info("All filesystems, swaps, loop devices, DM devices detached.");
+ /* Yay, done */
+ break;
+ }
+
+ /* If in this iteration we didn't manage to
+ * unmount/deactivate anything, we either kill more
+ * processes, or simply give up */
+ if (!changed) {
+
+ if (killed_everbody) {
+ /* Hmm, we already killed everybody,
+ * let's just give up */
+ log_error("Cannot finalize remaining file systems and devices, giving up.");
+ break;
+ }
+
+ log_warning("Cannot finalize remaining file systems and devices, trying to kill remaining processes.");
+ ultimate_send_signal(SIGTERM);
+ ultimate_send_signal(SIGKILL);
+ killed_everbody = true;
+ }
+
+ log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
+ }
+
+ if (retries >= FINALIZE_ATTEMPTS)
+ log_error("Too many iterations, giving up.");
+
+ execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, NULL);
+
+ /* If we are in a container, just exit, this will kill our
+ * container for good. */
+ if (in_container) {
+ log_error("Exiting container.");
+ exit(0);
+ }
+
+ if (access("/run/initramfs/shutdown", X_OK) == 0) {
+
+ if (prepare_new_root() >= 0 &&
+ pivot_to_new_root() >= 0) {
+ execv("/shutdown", argv);
+ log_error("Failed to execute shutdown binary: %m");
+ }
+ }
+
+ sync();
+
+ if (cmd == LINUX_REBOOT_CMD_KEXEC) {
+ /* We cheat and exec kexec to avoid doing all its work */
+ pid_t 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 {
+ /* Child */
+ const char *args[3] = { "/sbin/kexec", "-e", NULL };
+ execv(args[0], (char * const *) args);
+ return EXIT_FAILURE;
+ }
+
+ cmd = RB_AUTOBOOT;
+ }
+
+ reboot(cmd);
+ log_error("Failed to invoke reboot(): %m");
+ r = -errno;
+
+ error:
+ log_error("Critical error while doing system shutdown: %s", strerror(-r));
+
+ freeze();
+ return EXIT_FAILURE;
+}
diff --git a/src/core/umount.c b/src/core/umount.c
new file mode 100644
index 0000000..488e1e4
--- /dev/null
+++ b/src/core/umount.c
@@ -0,0 +1,649 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 ProFUSION embedded systems
+
+ 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 <string.h>
+#include <sys/mount.h>
+#include <sys/swap.h>
+#include <unistd.h>
+#include <linux/loop.h>
+#include <linux/dm-ioctl.h>
+#include <libudev.h>
+
+#include "list.h"
+#include "mount-setup.h"
+#include "umount.h"
+#include "util.h"
+
+typedef struct MountPoint {
+ char *path;
+ dev_t devnum;
+ bool skip_ro;
+ LIST_FIELDS (struct MountPoint, mount_point);
+} MountPoint;
+
+static void mount_point_free(MountPoint **head, MountPoint *m) {
+ assert(head);
+ assert(m);
+
+ LIST_REMOVE(MountPoint, mount_point, *head, m);
+
+ free(m->path);
+ free(m);
+}
+
+static void mount_points_list_free(MountPoint **head) {
+ assert(head);
+
+ while (*head)
+ mount_point_free(head, *head);
+}
+
+static int mount_points_list_get(MountPoint **head) {
+ FILE *proc_self_mountinfo;
+ char *path, *p;
+ unsigned int i;
+ int r;
+
+ assert(head);
+
+ if (!(proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
+ return -errno;
+
+ for (i = 1;; i++) {
+ int k;
+ MountPoint *m;
+ char *root;
+ bool skip_ro;
+
+ path = p = NULL;
+
+ if ((k = fscanf(proc_self_mountinfo,
+ "%*s " /* (1) mount id */
+ "%*s " /* (2) parent id */
+ "%*s " /* (3) major:minor */
+ "%ms " /* (4) root */
+ "%ms " /* (5) mount point */
+ "%*s" /* (6) mount options */
+ "%*[^-]" /* (7) optional fields */
+ "- " /* (8) separator */
+ "%*s " /* (9) file system type */
+ "%*s" /* (10) mount source */
+ "%*s" /* (11) mount options 2 */
+ "%*[^\n]", /* some rubbish at the end */
+ &root,
+ &path)) != 2) {
+ if (k == EOF)
+ break;
+
+ log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
+
+ free(path);
+ continue;
+ }
+
+ /* If we encounter a bind mount, don't try to remount
+ * the source dir too early */
+ skip_ro = !streq(root, "/");
+ free(root);
+
+ p = cunescape(path);
+ free(path);
+
+ if (!p) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ /* Ignore mount points we can't unmount because they
+ * are API or because we are keeping them open (like
+ * /dev/console) */
+ if (mount_point_is_api(p) ||
+ mount_point_ignore(p) ||
+ path_equal(p, "/dev/console")) {
+ free(p);
+ continue;
+ }
+
+ if (!(m = new0(MountPoint, 1))) {
+ free(p);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ m->path = p;
+ m->skip_ro = skip_ro;
+ LIST_PREPEND(MountPoint, mount_point, *head, m);
+ }
+
+ r = 0;
+
+finish:
+ fclose(proc_self_mountinfo);
+
+ return r;
+}
+
+static int swap_list_get(MountPoint **head) {
+ FILE *proc_swaps;
+ unsigned int i;
+ int r;
+
+ assert(head);
+
+ if (!(proc_swaps = fopen("/proc/swaps", "re")))
+ return (errno == ENOENT) ? 0 : -errno;
+
+ (void) fscanf(proc_swaps, "%*s %*s %*s %*s %*s\n");
+
+ for (i = 2;; i++) {
+ MountPoint *swap;
+ char *dev = NULL, *d;
+ int k;
+
+ if ((k = fscanf(proc_swaps,
+ "%ms " /* device/file */
+ "%*s " /* type of swap */
+ "%*s " /* swap size */
+ "%*s " /* used */
+ "%*s\n", /* priority */
+ &dev)) != 1) {
+
+ if (k == EOF)
+ break;
+
+ log_warning("Failed to parse /proc/swaps:%u.", i);
+
+ free(dev);
+ continue;
+ }
+
+ if (endswith(dev, "(deleted)")) {
+ free(dev);
+ continue;
+ }
+
+ d = cunescape(dev);
+ free(dev);
+
+ if (!d) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(swap = new0(MountPoint, 1))) {
+ free(d);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ swap->path = d;
+ LIST_PREPEND(MountPoint, mount_point, *head, swap);
+ }
+
+ r = 0;
+
+finish:
+ fclose(proc_swaps);
+
+ return r;
+}
+
+static int loopback_list_get(MountPoint **head) {
+ int r;
+ struct udev *udev;
+ struct udev_enumerate *e = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+
+ assert(head);
+
+ if (!(udev = udev_new())) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(e = udev_enumerate_new(udev))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
+ udev_enumerate_add_match_sysname(e, "loop*") < 0) {
+ r = -EIO;
+ goto finish;
+ }
+
+ if (udev_enumerate_scan_devices(e) < 0) {
+ r = -EIO;
+ goto finish;
+ }
+
+ first = udev_enumerate_get_list_entry(e);
+ udev_list_entry_foreach(item, first) {
+ MountPoint *lb;
+ struct udev_device *d;
+ char *loop;
+ const char *dn;
+
+ if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(dn = udev_device_get_devnode(d))) {
+ udev_device_unref(d);
+ continue;
+ }
+
+ loop = strdup(dn);
+ udev_device_unref(d);
+
+ if (!loop) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(lb = new0(MountPoint, 1))) {
+ free(loop);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ lb->path = loop;
+ LIST_PREPEND(MountPoint, mount_point, *head, lb);
+ }
+
+ r = 0;
+
+finish:
+ if (e)
+ udev_enumerate_unref(e);
+
+ if (udev)
+ udev_unref(udev);
+
+ return r;
+}
+
+static int dm_list_get(MountPoint **head) {
+ int r;
+ struct udev *udev;
+ struct udev_enumerate *e = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+
+ assert(head);
+
+ if (!(udev = udev_new())) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(e = udev_enumerate_new(udev))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
+ udev_enumerate_add_match_sysname(e, "dm-*") < 0) {
+ r = -EIO;
+ goto finish;
+ }
+
+ if (udev_enumerate_scan_devices(e) < 0) {
+ r = -EIO;
+ goto finish;
+ }
+
+ first = udev_enumerate_get_list_entry(e);
+
+ udev_list_entry_foreach(item, first) {
+ MountPoint *m;
+ struct udev_device *d;
+ dev_t devnum;
+ char *node;
+ const char *dn;
+
+ if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ devnum = udev_device_get_devnum(d);
+ dn = udev_device_get_devnode(d);
+
+ if (major(devnum) == 0 || !dn) {
+ udev_device_unref(d);
+ continue;
+ }
+
+ node = strdup(dn);
+ udev_device_unref(d);
+
+ if (!node) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ if (!(m = new(MountPoint, 1))) {
+ free(node);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ m->path = node;
+ m->devnum = devnum;
+ LIST_PREPEND(MountPoint, mount_point, *head, m);
+ }
+
+ r = 0;
+
+finish:
+ if (e)
+ udev_enumerate_unref(e);
+
+ if (udev)
+ udev_unref(udev);
+
+ return r;
+}
+
+static int delete_loopback(const char *device) {
+ int fd, r;
+
+ if ((fd = open(device, O_RDONLY|O_CLOEXEC)) < 0)
+ return errno == ENOENT ? 0 : -errno;
+
+ r = ioctl(fd, LOOP_CLR_FD, 0);
+ close_nointr_nofail(fd);
+
+ if (r >= 0)
+ return 1;
+
+ /* ENXIO: not bound, so no error */
+ if (errno == ENXIO)
+ return 0;
+
+ return -errno;
+}
+
+static int delete_dm(dev_t devnum) {
+ int fd, r;
+ struct dm_ioctl dm;
+
+ assert(major(devnum) != 0);
+
+ if ((fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC)) < 0)
+ return -errno;
+
+ zero(dm);
+ dm.version[0] = DM_VERSION_MAJOR;
+ dm.version[1] = DM_VERSION_MINOR;
+ dm.version[2] = DM_VERSION_PATCHLEVEL;
+
+ dm.data_size = sizeof(dm);
+ dm.dev = devnum;
+
+ r = ioctl(fd, DM_DEV_REMOVE, &dm);
+ close_nointr_nofail(fd);
+
+ return r >= 0 ? 0 : -errno;
+}
+
+static int mount_points_list_umount(MountPoint **head, bool *changed, bool log_error) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ if (path_equal(m->path, "/")
+#ifndef HAVE_SPLIT_USR
+ || path_equal(m->path, "/usr")
+#endif
+ ) {
+ n_failed++;
+ continue;
+ }
+
+ /* Trying to umount. Forcing to umount if busy (only for NFS mounts) */
+ if (umount2(m->path, MNT_FORCE) == 0) {
+ log_info("Unmounted %s.", m->path);
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else if (log_error) {
+ log_warning("Could not unmount %s: %m", m->path);
+ n_failed++;
+ }
+ }
+
+ return n_failed;
+}
+
+static int mount_points_list_remount_read_only(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+
+ if (m->skip_ro) {
+ n_failed++;
+ continue;
+ }
+
+ /* Trying to remount read-only */
+ if (mount(NULL, m->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0) {
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not remount as read-only %s: %m", m->path);
+ n_failed++;
+ }
+ }
+
+ return n_failed;
+}
+
+static int swap_points_list_off(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0;
+
+ assert(head);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ if (swapoff(m->path) == 0) {
+ if (changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not deactivate swap %s: %m", m->path);
+ n_failed++;
+ }
+ }
+
+ return n_failed;
+}
+
+static int loopback_points_list_detach(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0, k;
+ struct stat root_st;
+
+ assert(head);
+
+ k = lstat("/", &root_st);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ int r;
+ struct stat loopback_st;
+
+ if (k >= 0 &&
+ major(root_st.st_dev) != 0 &&
+ lstat(m->path, &loopback_st) >= 0 &&
+ root_st.st_dev == loopback_st.st_rdev) {
+ n_failed ++;
+ continue;
+ }
+
+ if ((r = delete_loopback(m->path)) >= 0) {
+
+ if (r > 0 && changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not delete loopback %s: %m", m->path);
+ n_failed++;
+ }
+ }
+
+ return n_failed;
+}
+
+static int dm_points_list_detach(MountPoint **head, bool *changed) {
+ MountPoint *m, *n;
+ int n_failed = 0, k;
+ struct stat root_st;
+
+ assert(head);
+
+ k = lstat("/", &root_st);
+
+ LIST_FOREACH_SAFE(mount_point, m, n, *head) {
+ int r;
+
+ if (k >= 0 &&
+ major(root_st.st_dev) != 0 &&
+ root_st.st_dev == m->devnum) {
+ n_failed ++;
+ continue;
+ }
+
+ if ((r = delete_dm(m->devnum)) >= 0) {
+
+ if (r > 0 && changed)
+ *changed = true;
+
+ mount_point_free(head, m);
+ } else {
+ log_warning("Could not delete dm %s: %m", m->path);
+ n_failed++;
+ }
+ }
+
+ return n_failed;
+}
+
+int umount_all(bool *changed) {
+ int r;
+ bool umount_changed;
+
+ LIST_HEAD(MountPoint, mp_list_head);
+
+ LIST_HEAD_INIT(MountPoint, mp_list_head);
+
+ r = mount_points_list_get(&mp_list_head);
+ if (r < 0)
+ goto end;
+
+ /* retry umount, until nothing can be umounted anymore */
+ do {
+ umount_changed = false;
+
+ mount_points_list_umount(&mp_list_head, &umount_changed, false);
+ if (umount_changed)
+ *changed = true;
+
+ } while (umount_changed);
+
+ /* umount one more time with logging enabled */
+ r = mount_points_list_umount(&mp_list_head, &umount_changed, true);
+ if (r <= 0)
+ goto end;
+
+ r = mount_points_list_remount_read_only(&mp_list_head, changed);
+
+ end:
+ mount_points_list_free(&mp_list_head);
+
+ return r;
+}
+
+int swapoff_all(bool *changed) {
+ int r;
+ LIST_HEAD(MountPoint, swap_list_head);
+
+ LIST_HEAD_INIT(MountPoint, swap_list_head);
+
+ r = swap_list_get(&swap_list_head);
+ if (r < 0)
+ goto end;
+
+ r = swap_points_list_off(&swap_list_head, changed);
+
+ end:
+ mount_points_list_free(&swap_list_head);
+
+ return r;
+}
+
+int loopback_detach_all(bool *changed) {
+ int r;
+ LIST_HEAD(MountPoint, loopback_list_head);
+
+ LIST_HEAD_INIT(MountPoint, loopback_list_head);
+
+ r = loopback_list_get(&loopback_list_head);
+ if (r < 0)
+ goto end;
+
+ r = loopback_points_list_detach(&loopback_list_head, changed);
+
+ end:
+ mount_points_list_free(&loopback_list_head);
+
+ return r;
+}
+
+int dm_detach_all(bool *changed) {
+ int r;
+ LIST_HEAD(MountPoint, dm_list_head);
+
+ LIST_HEAD_INIT(MountPoint, dm_list_head);
+
+ r = dm_list_get(&dm_list_head);
+ if (r < 0)
+ goto end;
+
+ r = dm_points_list_detach(&dm_list_head, changed);
+
+ end:
+ mount_points_list_free(&dm_list_head);
+
+ return r;
+}
diff --git a/src/core/umount.h b/src/core/umount.h
new file mode 100644
index 0000000..2e2f9c1
--- /dev/null
+++ b/src/core/umount.h
@@ -0,0 +1,33 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#ifndef fooumounthfoo
+#define fooumounthfoo
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 ProFUSION embedded systems
+
+ 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/>.
+***/
+
+int umount_all(bool *changed);
+
+int swapoff_all(bool *changed);
+
+int loopback_detach_all(bool *changed);
+
+int dm_detach_all(bool *changed);
+
+#endif
diff --git a/src/shutdown.c b/src/shutdown.c
deleted file mode 100644
index cd478b0..0000000
--- a/src/shutdown.c
+++ /dev/null
@@ -1,492 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 ProFUSION embedded systems
-
- 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 <sys/mman.h>
-#include <sys/types.h>
-#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 <fcntl.h>
-#include <dirent.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "missing.h"
-#include "log.h"
-#include "umount.h"
-#include "util.h"
-#include "mkdir.h"
-#include "virt.h"
-#include "watchdog.h"
-
-#define TIMEOUT_USEC (5 * USEC_PER_SEC)
-#define FINALIZE_ATTEMPTS 50
-
-static bool ignore_proc(pid_t pid) {
- char buf[PATH_MAX];
- FILE *f;
- char c;
- size_t count;
- uid_t uid;
- int r;
-
- /* We are PID 1, let's not commit suicide */
- if (pid == 1)
- return true;
-
- r = get_process_uid(pid, &uid);
- if (r < 0)
- return true; /* not really, but better safe than sorry */
-
- /* Non-root processes otherwise are always subject to be killed */
- if (uid != 0)
- return false;
-
- snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long) pid);
- char_array_0(buf);
-
- f = fopen(buf, "re");
- if (!f)
- return true; /* not really, but has the desired effect */
-
- count = fread(&c, 1, 1, f);
- fclose(f);
-
- /* Kernel threads have an empty cmdline */
- if (count <= 0)
- return true;
-
- /* Processes with argv[0][0] = '@' we ignore from the killing
- * spree.
- *
- * http://www.freedesktop.org/wiki/Software/systemd/RootStorageDaemons */
- if (count == 1 && c == '@')
- return true;
-
- return false;
-}
-
-static int killall(int sign) {
- DIR *dir;
- struct dirent *d;
- unsigned int n_processes = 0;
-
- dir = opendir("/proc");
- if (!dir)
- return -errno;
-
- while ((d = readdir(dir))) {
- pid_t pid;
-
- if (parse_pid(d->d_name, &pid) < 0)
- continue;
-
- if (ignore_proc(pid))
- continue;
-
- if (kill(pid, sign) == 0)
- n_processes++;
- else
- log_warning("Could not kill %d: %m", pid);
- }
-
- closedir(dir);
-
- return n_processes;
-}
-
-static void wait_for_children(int n_processes, sigset_t *mask) {
- usec_t until;
-
- assert(mask);
-
- until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
- for (;;) {
- struct timespec ts;
- int k;
- usec_t n;
-
- for (;;) {
- pid_t pid = waitpid(-1, NULL, WNOHANG);
-
- if (pid == 0)
- break;
-
- if (pid < 0 && errno == ECHILD)
- return;
-
- if (n_processes > 0)
- if (--n_processes == 0)
- return;
- }
-
- n = now(CLOCK_MONOTONIC);
- if (n >= until)
- return;
-
- timespec_store(&ts, until - n);
-
- if ((k = sigtimedwait(mask, NULL, &ts)) != SIGCHLD) {
-
- if (k < 0 && errno != EAGAIN) {
- log_error("sigtimedwait() failed: %m");
- return;
- }
-
- if (k >= 0)
- log_warning("sigtimedwait() returned unexpected signal.");
- }
- }
-}
-
-static void send_signal(int sign) {
- sigset_t mask, oldmask;
- int n_processes;
-
- assert_se(sigemptyset(&mask) == 0);
- assert_se(sigaddset(&mask, SIGCHLD) == 0);
- assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
-
- if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
- log_warning("kill(-1, SIGSTOP) failed: %m");
-
- n_processes = killall(sign);
-
- if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
- log_warning("kill(-1, SIGCONT) failed: %m");
-
- if (n_processes <= 0)
- goto finish;
-
- wait_for_children(n_processes, &mask);
-
-finish:
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
-}
-
-static void ultimate_send_signal(int sign) {
- sigset_t mask, oldmask;
- int r;
-
- assert_se(sigemptyset(&mask) == 0);
- assert_se(sigaddset(&mask, SIGCHLD) == 0);
- assert_se(sigprocmask(SIG_BLOCK, &mask, &oldmask) == 0);
-
- if (kill(-1, SIGSTOP) < 0 && errno != ESRCH)
- log_warning("kill(-1, SIGSTOP) failed: %m");
-
- r = kill(-1, sign);
- if (r < 0 && errno != ESRCH)
- log_warning("kill(-1, %s) failed: %m", signal_to_string(sign));
-
- if (kill(-1, SIGCONT) < 0 && errno != ESRCH)
- log_warning("kill(-1, SIGCONT) failed: %m");
-
- if (r < 0)
- goto finish;
-
- wait_for_children(0, &mask);
-
-finish:
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
-}
-
-static int prepare_new_root(void) {
- static const char dirs[] =
- "/run/initramfs/oldroot\0"
- "/run/initramfs/proc\0"
- "/run/initramfs/sys\0"
- "/run/initramfs/dev\0"
- "/run/initramfs/run\0";
-
- const char *dir;
-
- if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /run/initramfs on /run/initramfs: %m");
- return -errno;
- }
-
- if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) {
- log_error("Failed to make /run/initramfs private mount: %m");
- return -errno;
- }
-
- NULSTR_FOREACH(dir, dirs)
- if (mkdir_p(dir, 0755) < 0 && errno != EEXIST) {
- log_error("Failed to mkdir %s: %m", dir);
- return -errno;
- }
-
- if (mount("/sys", "/run/initramfs/sys", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /sys on /run/initramfs/sys: %m");
- return -errno;
- }
-
- if (mount("/proc", "/run/initramfs/proc", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /proc on /run/initramfs/proc: %m");
- return -errno;
- }
-
- if (mount("/dev", "/run/initramfs/dev", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /dev on /run/initramfs/dev: %m");
- return -errno;
- }
-
- if (mount("/run", "/run/initramfs/run", NULL, MS_BIND, NULL) < 0) {
- log_error("Failed to mount bind /run on /run/initramfs/run: %m");
- return -errno;
- }
-
- return 0;
-}
-
-static int pivot_to_new_root(void) {
- int fd;
-
- chdir("/run/initramfs");
-
- /*
- In case some evil process made "/" MS_SHARED
- It works for pivot_root, but the ref count for the root device
- is not decreasing :-/
- */
- if (mount(NULL, "/", NULL, MS_PRIVATE, NULL) < 0) {
- log_error("Failed to make \"/\" private mount %m");
- return -errno;
- }
-
- if (pivot_root(".", "oldroot") < 0) {
- log_error("pivot failed: %m");
- /* only chroot if pivot root succeded */
- return -errno;
- }
-
- chroot(".");
- log_info("Successfully changed into root pivot.");
-
- fd = open("/dev/console", O_RDWR);
- if (fd < 0)
- log_error("Failed to open /dev/console: %m");
- else {
- make_stdio(fd);
-
- /* Initialize the controlling terminal */
- setsid();
- ioctl(STDIN_FILENO, TIOCSCTTY, NULL);
- }
-
- return 0;
-}
-
-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 killed_everbody = false, in_container, use_watchdog = false;
-
- log_parse_environment();
- log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
- log_open();
-
- umask(0022);
-
- if (getpid() != 1) {
- log_error("Not executed by init (pid 1).");
- r = -EPERM;
- goto error;
- }
-
- if (argc != 2) {
- log_error("Invalid number of arguments.");
- r = -EINVAL;
- goto error;
- }
-
- in_container = detect_container(NULL) > 0;
-
- if (streq(argv[1], "reboot"))
- cmd = RB_AUTOBOOT;
- else if (streq(argv[1], "poweroff"))
- cmd = RB_POWER_OFF;
- else if (streq(argv[1], "halt"))
- cmd = RB_HALT_SYSTEM;
- else if (streq(argv[1], "kexec"))
- cmd = LINUX_REBOOT_CMD_KEXEC;
- else {
- log_error("Unknown action '%s'.", argv[1]);
- r = -EINVAL;
- goto error;
- }
-
- use_watchdog = !!getenv("WATCHDOG_USEC");
-
- /* lock us into memory */
- if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0)
- log_warning("Cannot lock process memory: %m");
-
- log_info("Sending SIGTERM to remaining processes...");
- send_signal(SIGTERM);
-
- log_info("Sending SIGKILL to remaining processes...");
- send_signal(SIGKILL);
-
- if (in_container)
- need_swapoff = false;
-
- /* Unmount all mountpoints, swaps, and loopback devices */
- for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
- bool changed = false;
-
- if (use_watchdog)
- watchdog_ping();
-
- if (need_umount) {
- log_info("Unmounting file systems.");
- r = umount_all(&changed);
- if (r == 0)
- need_umount = false;
- 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.");
- r = swapoff_all(&changed);
- if (r == 0)
- need_swapoff = false;
- else if (r > 0)
- log_info("Not all swaps are turned off, %d left.", r);
- else
- log_error("Failed to turn off swaps: %s", strerror(-r));
- }
-
- if (need_loop_detach) {
- log_info("Detaching loop devices.");
- r = loopback_detach_all(&changed);
- if (r == 0)
- need_loop_detach = false;
- 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)
- need_dm_detach = false;
- else if (r > 0)
- log_warning("Not all DM devices detached, %d left.", r);
- else
- log_error("Failed to detach DM devices: %s", strerror(-r));
- }
-
- if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) {
- if (retries > 0)
- log_info("All filesystems, swaps, loop devices, DM devices detached.");
- /* Yay, done */
- break;
- }
-
- /* If in this iteration we didn't manage to
- * unmount/deactivate anything, we either kill more
- * processes, or simply give up */
- if (!changed) {
-
- if (killed_everbody) {
- /* Hmm, we already killed everybody,
- * let's just give up */
- log_error("Cannot finalize remaining file systems and devices, giving up.");
- break;
- }
-
- log_warning("Cannot finalize remaining file systems and devices, trying to kill remaining processes.");
- ultimate_send_signal(SIGTERM);
- ultimate_send_signal(SIGKILL);
- killed_everbody = true;
- }
-
- log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
- }
-
- if (retries >= FINALIZE_ATTEMPTS)
- log_error("Too many iterations, giving up.");
-
- execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, NULL);
-
- /* If we are in a container, just exit, this will kill our
- * container for good. */
- if (in_container) {
- log_error("Exiting container.");
- exit(0);
- }
-
- if (access("/run/initramfs/shutdown", X_OK) == 0) {
-
- if (prepare_new_root() >= 0 &&
- pivot_to_new_root() >= 0) {
- execv("/shutdown", argv);
- log_error("Failed to execute shutdown binary: %m");
- }
- }
-
- sync();
-
- if (cmd == LINUX_REBOOT_CMD_KEXEC) {
- /* We cheat and exec kexec to avoid doing all its work */
- pid_t 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 {
- /* Child */
- const char *args[3] = { "/sbin/kexec", "-e", NULL };
- execv(args[0], (char * const *) args);
- return EXIT_FAILURE;
- }
-
- cmd = RB_AUTOBOOT;
- }
-
- reboot(cmd);
- log_error("Failed to invoke reboot(): %m");
- r = -errno;
-
- error:
- log_error("Critical error while doing system shutdown: %s", strerror(-r));
-
- freeze();
- return EXIT_FAILURE;
-}
diff --git a/src/umount.c b/src/umount.c
deleted file mode 100644
index 488e1e4..0000000
--- a/src/umount.c
+++ /dev/null
@@ -1,649 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 ProFUSION embedded systems
-
- 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 <string.h>
-#include <sys/mount.h>
-#include <sys/swap.h>
-#include <unistd.h>
-#include <linux/loop.h>
-#include <linux/dm-ioctl.h>
-#include <libudev.h>
-
-#include "list.h"
-#include "mount-setup.h"
-#include "umount.h"
-#include "util.h"
-
-typedef struct MountPoint {
- char *path;
- dev_t devnum;
- bool skip_ro;
- LIST_FIELDS (struct MountPoint, mount_point);
-} MountPoint;
-
-static void mount_point_free(MountPoint **head, MountPoint *m) {
- assert(head);
- assert(m);
-
- LIST_REMOVE(MountPoint, mount_point, *head, m);
-
- free(m->path);
- free(m);
-}
-
-static void mount_points_list_free(MountPoint **head) {
- assert(head);
-
- while (*head)
- mount_point_free(head, *head);
-}
-
-static int mount_points_list_get(MountPoint **head) {
- FILE *proc_self_mountinfo;
- char *path, *p;
- unsigned int i;
- int r;
-
- assert(head);
-
- if (!(proc_self_mountinfo = fopen("/proc/self/mountinfo", "re")))
- return -errno;
-
- for (i = 1;; i++) {
- int k;
- MountPoint *m;
- char *root;
- bool skip_ro;
-
- path = p = NULL;
-
- if ((k = fscanf(proc_self_mountinfo,
- "%*s " /* (1) mount id */
- "%*s " /* (2) parent id */
- "%*s " /* (3) major:minor */
- "%ms " /* (4) root */
- "%ms " /* (5) mount point */
- "%*s" /* (6) mount options */
- "%*[^-]" /* (7) optional fields */
- "- " /* (8) separator */
- "%*s " /* (9) file system type */
- "%*s" /* (10) mount source */
- "%*s" /* (11) mount options 2 */
- "%*[^\n]", /* some rubbish at the end */
- &root,
- &path)) != 2) {
- if (k == EOF)
- break;
-
- log_warning("Failed to parse /proc/self/mountinfo:%u.", i);
-
- free(path);
- continue;
- }
-
- /* If we encounter a bind mount, don't try to remount
- * the source dir too early */
- skip_ro = !streq(root, "/");
- free(root);
-
- p = cunescape(path);
- free(path);
-
- if (!p) {
- r = -ENOMEM;
- goto finish;
- }
-
- /* Ignore mount points we can't unmount because they
- * are API or because we are keeping them open (like
- * /dev/console) */
- if (mount_point_is_api(p) ||
- mount_point_ignore(p) ||
- path_equal(p, "/dev/console")) {
- free(p);
- continue;
- }
-
- if (!(m = new0(MountPoint, 1))) {
- free(p);
- r = -ENOMEM;
- goto finish;
- }
-
- m->path = p;
- m->skip_ro = skip_ro;
- LIST_PREPEND(MountPoint, mount_point, *head, m);
- }
-
- r = 0;
-
-finish:
- fclose(proc_self_mountinfo);
-
- return r;
-}
-
-static int swap_list_get(MountPoint **head) {
- FILE *proc_swaps;
- unsigned int i;
- int r;
-
- assert(head);
-
- if (!(proc_swaps = fopen("/proc/swaps", "re")))
- return (errno == ENOENT) ? 0 : -errno;
-
- (void) fscanf(proc_swaps, "%*s %*s %*s %*s %*s\n");
-
- for (i = 2;; i++) {
- MountPoint *swap;
- char *dev = NULL, *d;
- int k;
-
- if ((k = fscanf(proc_swaps,
- "%ms " /* device/file */
- "%*s " /* type of swap */
- "%*s " /* swap size */
- "%*s " /* used */
- "%*s\n", /* priority */
- &dev)) != 1) {
-
- if (k == EOF)
- break;
-
- log_warning("Failed to parse /proc/swaps:%u.", i);
-
- free(dev);
- continue;
- }
-
- if (endswith(dev, "(deleted)")) {
- free(dev);
- continue;
- }
-
- d = cunescape(dev);
- free(dev);
-
- if (!d) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(swap = new0(MountPoint, 1))) {
- free(d);
- r = -ENOMEM;
- goto finish;
- }
-
- swap->path = d;
- LIST_PREPEND(MountPoint, mount_point, *head, swap);
- }
-
- r = 0;
-
-finish:
- fclose(proc_swaps);
-
- return r;
-}
-
-static int loopback_list_get(MountPoint **head) {
- int r;
- struct udev *udev;
- struct udev_enumerate *e = NULL;
- struct udev_list_entry *item = NULL, *first = NULL;
-
- assert(head);
-
- if (!(udev = udev_new())) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(e = udev_enumerate_new(udev))) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
- udev_enumerate_add_match_sysname(e, "loop*") < 0) {
- r = -EIO;
- goto finish;
- }
-
- if (udev_enumerate_scan_devices(e) < 0) {
- r = -EIO;
- goto finish;
- }
-
- first = udev_enumerate_get_list_entry(e);
- udev_list_entry_foreach(item, first) {
- MountPoint *lb;
- struct udev_device *d;
- char *loop;
- const char *dn;
-
- if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(dn = udev_device_get_devnode(d))) {
- udev_device_unref(d);
- continue;
- }
-
- loop = strdup(dn);
- udev_device_unref(d);
-
- if (!loop) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(lb = new0(MountPoint, 1))) {
- free(loop);
- r = -ENOMEM;
- goto finish;
- }
-
- lb->path = loop;
- LIST_PREPEND(MountPoint, mount_point, *head, lb);
- }
-
- r = 0;
-
-finish:
- if (e)
- udev_enumerate_unref(e);
-
- if (udev)
- udev_unref(udev);
-
- return r;
-}
-
-static int dm_list_get(MountPoint **head) {
- int r;
- struct udev *udev;
- struct udev_enumerate *e = NULL;
- struct udev_list_entry *item = NULL, *first = NULL;
-
- assert(head);
-
- if (!(udev = udev_new())) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(e = udev_enumerate_new(udev))) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
- udev_enumerate_add_match_sysname(e, "dm-*") < 0) {
- r = -EIO;
- goto finish;
- }
-
- if (udev_enumerate_scan_devices(e) < 0) {
- r = -EIO;
- goto finish;
- }
-
- first = udev_enumerate_get_list_entry(e);
-
- udev_list_entry_foreach(item, first) {
- MountPoint *m;
- struct udev_device *d;
- dev_t devnum;
- char *node;
- const char *dn;
-
- if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
- r = -ENOMEM;
- goto finish;
- }
-
- devnum = udev_device_get_devnum(d);
- dn = udev_device_get_devnode(d);
-
- if (major(devnum) == 0 || !dn) {
- udev_device_unref(d);
- continue;
- }
-
- node = strdup(dn);
- udev_device_unref(d);
-
- if (!node) {
- r = -ENOMEM;
- goto finish;
- }
-
- if (!(m = new(MountPoint, 1))) {
- free(node);
- r = -ENOMEM;
- goto finish;
- }
-
- m->path = node;
- m->devnum = devnum;
- LIST_PREPEND(MountPoint, mount_point, *head, m);
- }
-
- r = 0;
-
-finish:
- if (e)
- udev_enumerate_unref(e);
-
- if (udev)
- udev_unref(udev);
-
- return r;
-}
-
-static int delete_loopback(const char *device) {
- int fd, r;
-
- if ((fd = open(device, O_RDONLY|O_CLOEXEC)) < 0)
- return errno == ENOENT ? 0 : -errno;
-
- r = ioctl(fd, LOOP_CLR_FD, 0);
- close_nointr_nofail(fd);
-
- if (r >= 0)
- return 1;
-
- /* ENXIO: not bound, so no error */
- if (errno == ENXIO)
- return 0;
-
- return -errno;
-}
-
-static int delete_dm(dev_t devnum) {
- int fd, r;
- struct dm_ioctl dm;
-
- assert(major(devnum) != 0);
-
- if ((fd = open("/dev/mapper/control", O_RDWR|O_CLOEXEC)) < 0)
- return -errno;
-
- zero(dm);
- dm.version[0] = DM_VERSION_MAJOR;
- dm.version[1] = DM_VERSION_MINOR;
- dm.version[2] = DM_VERSION_PATCHLEVEL;
-
- dm.data_size = sizeof(dm);
- dm.dev = devnum;
-
- r = ioctl(fd, DM_DEV_REMOVE, &dm);
- close_nointr_nofail(fd);
-
- return r >= 0 ? 0 : -errno;
-}
-
-static int mount_points_list_umount(MountPoint **head, bool *changed, bool log_error) {
- MountPoint *m, *n;
- int n_failed = 0;
-
- assert(head);
-
- LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- if (path_equal(m->path, "/")
-#ifndef HAVE_SPLIT_USR
- || path_equal(m->path, "/usr")
-#endif
- ) {
- n_failed++;
- continue;
- }
-
- /* Trying to umount. Forcing to umount if busy (only for NFS mounts) */
- if (umount2(m->path, MNT_FORCE) == 0) {
- log_info("Unmounted %s.", m->path);
- if (changed)
- *changed = true;
-
- mount_point_free(head, m);
- } else if (log_error) {
- log_warning("Could not unmount %s: %m", m->path);
- n_failed++;
- }
- }
-
- return n_failed;
-}
-
-static int mount_points_list_remount_read_only(MountPoint **head, bool *changed) {
- MountPoint *m, *n;
- int n_failed = 0;
-
- assert(head);
-
- LIST_FOREACH_SAFE(mount_point, m, n, *head) {
-
- if (m->skip_ro) {
- n_failed++;
- continue;
- }
-
- /* Trying to remount read-only */
- if (mount(NULL, m->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0) {
- if (changed)
- *changed = true;
-
- mount_point_free(head, m);
- } else {
- log_warning("Could not remount as read-only %s: %m", m->path);
- n_failed++;
- }
- }
-
- return n_failed;
-}
-
-static int swap_points_list_off(MountPoint **head, bool *changed) {
- MountPoint *m, *n;
- int n_failed = 0;
-
- assert(head);
-
- LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- if (swapoff(m->path) == 0) {
- if (changed)
- *changed = true;
-
- mount_point_free(head, m);
- } else {
- log_warning("Could not deactivate swap %s: %m", m->path);
- n_failed++;
- }
- }
-
- return n_failed;
-}
-
-static int loopback_points_list_detach(MountPoint **head, bool *changed) {
- MountPoint *m, *n;
- int n_failed = 0, k;
- struct stat root_st;
-
- assert(head);
-
- k = lstat("/", &root_st);
-
- LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- int r;
- struct stat loopback_st;
-
- if (k >= 0 &&
- major(root_st.st_dev) != 0 &&
- lstat(m->path, &loopback_st) >= 0 &&
- root_st.st_dev == loopback_st.st_rdev) {
- n_failed ++;
- continue;
- }
-
- if ((r = delete_loopback(m->path)) >= 0) {
-
- if (r > 0 && changed)
- *changed = true;
-
- mount_point_free(head, m);
- } else {
- log_warning("Could not delete loopback %s: %m", m->path);
- n_failed++;
- }
- }
-
- return n_failed;
-}
-
-static int dm_points_list_detach(MountPoint **head, bool *changed) {
- MountPoint *m, *n;
- int n_failed = 0, k;
- struct stat root_st;
-
- assert(head);
-
- k = lstat("/", &root_st);
-
- LIST_FOREACH_SAFE(mount_point, m, n, *head) {
- int r;
-
- if (k >= 0 &&
- major(root_st.st_dev) != 0 &&
- root_st.st_dev == m->devnum) {
- n_failed ++;
- continue;
- }
-
- if ((r = delete_dm(m->devnum)) >= 0) {
-
- if (r > 0 && changed)
- *changed = true;
-
- mount_point_free(head, m);
- } else {
- log_warning("Could not delete dm %s: %m", m->path);
- n_failed++;
- }
- }
-
- return n_failed;
-}
-
-int umount_all(bool *changed) {
- int r;
- bool umount_changed;
-
- LIST_HEAD(MountPoint, mp_list_head);
-
- LIST_HEAD_INIT(MountPoint, mp_list_head);
-
- r = mount_points_list_get(&mp_list_head);
- if (r < 0)
- goto end;
-
- /* retry umount, until nothing can be umounted anymore */
- do {
- umount_changed = false;
-
- mount_points_list_umount(&mp_list_head, &umount_changed, false);
- if (umount_changed)
- *changed = true;
-
- } while (umount_changed);
-
- /* umount one more time with logging enabled */
- r = mount_points_list_umount(&mp_list_head, &umount_changed, true);
- if (r <= 0)
- goto end;
-
- r = mount_points_list_remount_read_only(&mp_list_head, changed);
-
- end:
- mount_points_list_free(&mp_list_head);
-
- return r;
-}
-
-int swapoff_all(bool *changed) {
- int r;
- LIST_HEAD(MountPoint, swap_list_head);
-
- LIST_HEAD_INIT(MountPoint, swap_list_head);
-
- r = swap_list_get(&swap_list_head);
- if (r < 0)
- goto end;
-
- r = swap_points_list_off(&swap_list_head, changed);
-
- end:
- mount_points_list_free(&swap_list_head);
-
- return r;
-}
-
-int loopback_detach_all(bool *changed) {
- int r;
- LIST_HEAD(MountPoint, loopback_list_head);
-
- LIST_HEAD_INIT(MountPoint, loopback_list_head);
-
- r = loopback_list_get(&loopback_list_head);
- if (r < 0)
- goto end;
-
- r = loopback_points_list_detach(&loopback_list_head, changed);
-
- end:
- mount_points_list_free(&loopback_list_head);
-
- return r;
-}
-
-int dm_detach_all(bool *changed) {
- int r;
- LIST_HEAD(MountPoint, dm_list_head);
-
- LIST_HEAD_INIT(MountPoint, dm_list_head);
-
- r = dm_list_get(&dm_list_head);
- if (r < 0)
- goto end;
-
- r = dm_points_list_detach(&dm_list_head, changed);
-
- end:
- mount_points_list_free(&dm_list_head);
-
- return r;
-}
diff --git a/src/umount.h b/src/umount.h
deleted file mode 100644
index 2e2f9c1..0000000
--- a/src/umount.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#ifndef fooumounthfoo
-#define fooumounthfoo
-
-/***
- This file is part of systemd.
-
- Copyright 2010 ProFUSION embedded systems
-
- 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/>.
-***/
-
-int umount_all(bool *changed);
-
-int swapoff_all(bool *changed);
-
-int loopback_detach_all(bool *changed);
-
-int dm_detach_all(bool *changed);
-
-#endif
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