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Diffstat (limited to 'src/umount.c')
-rw-r--r--src/umount.c151
1 files changed, 145 insertions, 6 deletions
diff --git a/src/umount.c b/src/umount.c
index 44bed611ea..28cfd7e7cd 100644
--- a/src/umount.c
+++ b/src/umount.c
@@ -26,6 +26,7 @@
#include <sys/swap.h>
#include <unistd.h>
#include <linux/loop.h>
+#include <linux/dm-ioctl.h>
#include <libudev.h>
#include "list.h"
@@ -208,12 +209,8 @@ static int loopback_list_get(MountPoint **loopback_list_head) {
goto finish;
}
- if (udev_enumerate_add_match_subsystem(e, "block") < 0) {
- r = -EIO;
- goto finish;
- }
-
- if (udev_enumerate_add_match_sysname(e, "loop*") < 0) {
+ if (udev_enumerate_add_match_subsystem(e, "block") < 0 ||
+ udev_enumerate_add_match_sysname(e, "loop*") < 0) {
r = -EIO;
goto finish;
}
@@ -268,6 +265,87 @@ finish:
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;
+ }
+
+ 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 *dm = NULL;
+ struct udev_list_entry *dlink = NULL, *first_dlink = NULL;
+
+ if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ 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, *dm_list_head, lb);
+ }
+
+ 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;
@@ -281,6 +359,33 @@ static int delete_loopback(const char *device) {
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) {
MountPoint *mp, *mp_next;
int failed = 0;
@@ -350,6 +455,22 @@ static int loopback_points_list_detach(MountPoint **loopback_list_head) {
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 failed;
+}
+
int umount_all(void) {
int r;
LIST_HEAD(MountPoint, mp_list_head);
@@ -407,3 +528,21 @@ int loopback_detach_all(void) {
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;
+}