To set up a verity/cryptsetup RootImage the forked child needs to
ioctl /dev/mapper/control and create a new mapper.
If PrivateDevices=yes and/or DevicePolicy=closed are used, this is
blocked by the cgroup setting, so add an exception like it's done
for loop devices (and also add a dependency on the kernel modules
implementing them).
if (ec->root_image &&
(cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) {
if (ec->root_image &&
(cc->device_policy != CGROUP_DEVICE_POLICY_AUTO || cc->device_allow)) {
/* When RootImage= is specified, the following devices are touched. */
/* When RootImage= is specified, the following devices are touched. */
- r = cgroup_add_device_allow(cc, "/dev/loop-control", "rw");
- if (r < 0)
- return r;
-
- r = cgroup_add_device_allow(cc, "block-loop", "rwm");
- if (r < 0)
- return r;
-
- r = cgroup_add_device_allow(cc, "block-blkext", "rwm");
- if (r < 0)
- return r;
+ FOREACH_STRING(p, "/dev/loop-control", "/dev/mapper/control") {
+ r = cgroup_add_device_allow(cc, p, "rw");
+ if (r < 0)
+ return r;
+ }
+ FOREACH_STRING(p, "block-loop", "block-blkext", "block-device-mapper") {
+ r = cgroup_add_device_allow(cc, p, "rwm");
+ if (r < 0)
+ return r;
+ }
- /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices */
- r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, "modprobe@loop.service", true, UNIT_DEPENDENCY_FILE);
- if (r < 0)
- return r;
+ /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices.
+ * Same for mapper and verity. */
+ FOREACH_STRING(p, "modprobe@loop.service", "modprobe@dm_mod.service", "modprobe@dm_verity.service") {
+ r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_WANTS, p, true, UNIT_DEPENDENCY_FILE);
+ if (r < 0)
+ return r;
+ }
}
if (ec->protect_clock) {
}
if (ec->protect_clock) {