tree 5093e3a4c420ff1e81aebd58bc5ee5ebf036b847
parent 569c97eebd46b7c7a7740dea837f2e86475c02c2
author Kelvin Zhang <zhangkelvin@google.com> 1615577313 -0500
committer Kelvin Zhang <zhangkelvin@google.com> 1616594929 -0400

Make dynamic partition control android return a writable fd

We can return a FileDescriptor object, which encapsulates logic needed
to write to a COW. This way, filesystem verfication action can use the
turend value directly for computing verity and hash the partition.

Test: th
Change-Id: Iafe9699ef0cc15961641fc94f8ad2820230a56e1