tree bc800cd569320b3d582522b24faef70f552142c6
parent 19e74b3d1fb033a4dda3e55e04239c6feb10863e
author David Anderson <dvander@google.com> 1557777774 -0700
committer David Anderson <dvander@google.com> 1557778032 -0700

Replace manual dm ioctls with libdm.

This mostly 1:1 replaces manual ioctls to device-mapper with calls to
libdm. There were two exceptions:

(1) There is a very old table-load-retry loop to workaround issues with
    umount (b/7220345). This loop has been preserved, however, it now
    includes DM_DEV_CREATE as well as DM_TABLE_LOAD.
(2) There was some ancient code to set DM_DEV_GEOMETRY for obb
    dm-devices. This never did anything since geometry must be set after
    loading a table. When setting it before (as vold was doing), the
    subsequent DM_TABLE_LOAD will clear it.

Bug: 132206403
Test: FBE device boots
      FBE device w/ metadata encryption boots
      FDE device boots
      atest StorageManagerIntegrationTest
Change-Id: Ib6db6b47329f093ac7084edaf604eddace8b9ac6