tree d71c47bdfd720ca9c7d2bf35a24c82c2c2de9ba0
parent c9facc0a1f6f3facb7d67ddae9b8a04af78dad0c
author Jeff Sharkey <jsharkey@android.com> 1483554813 -0700
committer Jeff Sharkey <jsharkey@android.com> 1483655956 -0700

Initial API shape for storage statistics.

This API is designed to provide both UID-level stats and overall
summary data for a given storage device, as identified by UUID.

The use of UID-level granularity might appear a bit clunky, but it
matches other usage statistics (such as network and battery), and it
allows us to implement it using an extremely fast quota kernel
feature.

A future CL will wire up the implementation to installd.

Test: builds, boots
Bug: 32206268
Change-Id: I7b51877682d0370c2402c19346f57809f0e7ac53