#include <sys/swap.h>
#include <unistd.h>
#include <linux/loop.h>
+#include <linux/dm-ioctl.h>
#include <libudev.h>
#include "list.h"
LIST_FIELDS (struct MountPoint, mount_point);
} MountPoint;
+/* Takes over possession of path */
static MountPoint *mount_point_alloc(char *path) {
MountPoint *mp;
continue;
}
- if (mount_point_is_api(path)) {
- free(path);
- continue;
- }
+ p = cunescape(path);
+ free(path);
- if (!(p = cunescape(path))) {
+ if (!p) {
r = -ENOMEM;
goto finish;
}
+ if (mount_point_is_api(p)) {
+ free(p);
+ continue;
+ }
+
if (!(mp = mount_point_alloc(p))) {
+ free(p);
r = -ENOMEM;
goto finish;
}
- LIST_PREPEND(MountPoint, mount_point, *mount_point_list_head, mp);
- free(path);
+ LIST_PREPEND(MountPoint, mount_point, *mount_point_list_head, mp);
}
r = 0;
finish:
fclose(proc_self_mountinfo);
- free(path);
-
return r;
}
goto finish;
}
- if (udev_enumerate_add_match_subsystem(e, "block") < 0) {
+ if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
+ udev_enumerate_add_match_sysname(e, "loop*") < 0) {
r = -EIO;
goto finish;
}
- if (udev_enumerate_add_match_sysname(e, "loop*") < 0) {
+ 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))) {
+ loop = strdup(dn);
+ udev_device_unref(d);
+
+ if (!loop) {
+ r = -ENOMEM;
+ goto finish;
+ }
+ } else
+ udev_device_unref(d);
+
+ if (!(lb = mount_point_alloc(loop))) {
+ free(loop);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ LIST_PREPEND(MountPoint, mount_point, *loopback_list_head, lb);
+ }
+
+ r = 0;
+
+finish:
+ if (e)
+ udev_enumerate_unref(e);
+
+ if (udev)
+ udev_unref(udev);
+
+ return r;
+}
+
+static int dm_list_get(MountPoint **dm_list_head) {
+ int r;
+ struct udev *udev;
+ struct udev_enumerate *e = NULL;
+ struct udev_list_entry *item = NULL, *first = NULL;
+
+ 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;
}
udev_list_entry_foreach(item, first) {
MountPoint *lb;
- char *loop;
+ struct udev_device *d;
+ char *dm = NULL;
+ struct udev_list_entry *dlink = NULL, *first_dlink = NULL;
- loop = cunescape(udev_list_entry_get_name(item));
- if (!loop) {
+ if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
r = -ENOMEM;
goto finish;
}
- lb = mount_point_alloc(loop);
- if (!lb) {
- free(loop);
+ first_dlink = udev_device_get_devlinks_list_entry(d);
+ udev_list_entry_foreach(dlink, first_dlink) {
+
+ if (startswith(udev_list_entry_get_name(dlink), "/dev/mapper/")) {
+
+ if (!(dm = strdup(udev_list_entry_get_name(dlink)))) {
+ udev_device_unref(d);
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ break;
+ }
+ }
+
+ udev_device_unref(d);
+
+ if (!dm)
+ continue;
+
+ if (!(lb = mount_point_alloc(dm))) {
+ free(dm);
r = -ENOMEM;
goto finish;
}
- LIST_PREPEND(MountPoint, mount_point, *loopback_list_head, lb);
+ LIST_PREPEND(MountPoint, mount_point, *dm_list_head, lb);
}
r = 0;
if (e)
udev_enumerate_unref(e);
- free(udev);
+ 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) {
- if (errno == ENOENT) {
- log_debug("Loop device %s does not exist.", device);
- errno = 0;
- return 0;
- }
+ if ((fd = open(device, O_RDONLY|O_CLOEXEC)) < 0)
return -errno;
- }
- ioctl(fd, LOOP_CLR_FD, 0);
- r = errno;
+ r = ioctl(fd, LOOP_CLR_FD, 0);
close_nointr_nofail(fd);
- if (r == ENXIO) /* not bound, so no error */
- r = 0;
- errno = r;
- return -errno;
+ /* ENXIO: not bound, so no error */
+ return (r >= 0 || errno == ENXIO) ? 0 : -errno;
+}
+
+static int delete_dm(const char *device) {
+ int fd, r;
+ struct dm_ioctl dm;
+
+ assert(device);
+
+ if (!startswith(device, "/dev/mapper/"))
+ return -EIO;
+
+ 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);
+
+ strncpy(dm.name, device + 12, sizeof(dm.name));
+
+ r = ioctl(fd, DM_DEV_REMOVE, &dm);
+ close_nointr_nofail(fd);
+
+ return r >= 0 ? 0 : -errno;
}
static int mount_points_list_umount(MountPoint **mount_point_list_head) {
if (umount2(mp->path, MNT_FORCE) == 0)
mount_point_remove_and_free(mp, mount_point_list_head);
else {
- log_debug("Could not unmount %s: %m", mp->path);
+ log_warning("Could not unmount %s: %m", mp->path);
failed++;
}
}
if (mount(NULL, mp->path, NULL, MS_MGC_VAL|MS_REMOUNT|MS_RDONLY, NULL) == 0)
mount_point_remove_and_free(mp, mount_point_list_head);
else {
- log_debug("Could not remount as read-only %s: %m", mp->path);
+ log_warning("Could not remount as read-only %s: %m", mp->path);
failed++;
}
}
if (swapoff(swap->path) == 0)
mount_point_remove_and_free(swap, swap_list_head);
else {
- log_debug("Could not swapoff %s: %m", swap->path);
+ log_warning("Could not deactivate swap %s: %m", swap->path);
failed++;
}
}
if (delete_loopback(loopback->path) == 0)
mount_point_remove_and_free(loopback, loopback_list_head);
else {
- log_debug("Could not delete loopback %s: %m", loopback->path);
+ log_warning("Could not delete loopback %s: %m", loopback->path);
+ failed++;
+ }
+ }
+
+ return failed;
+}
+
+static int dm_points_list_detach(MountPoint **dm_list_head) {
+ MountPoint *dm, *dm_next;
+ int failed = 0;
+
+ LIST_FOREACH_SAFE(mount_point, dm, dm_next, *dm_list_head) {
+ if (delete_dm(dm->path) == 0)
+ mount_point_remove_and_free(dm, dm_list_head);
+ else {
+ log_warning("Could not delete dm %s: %m", dm->path);
failed++;
}
}
return r;
}
+
+int dm_detach_all(void) {
+ 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);
+
+ end:
+ mount_points_list_free(&dm_list_head);
+
+ return r;
+}
~ianmdlvl / elogind.git / blobdiff