commit bfe6900ff9c102006ab932d1157fe119ce650c6f
author Ricardo Quesada <ricardoq@google.com> Mon Mar 09 15:26:00 2020 -0700
committer Ricardo Quesada <ricardoq@google.com> Mon Mar 16 15:53:42 2020 +0000
tree 8e28d7f0e6a80a1bb477270f2eec05c8c2c2319e
parent bac0268f63afa87c713d2f0a2ea32a6b85d92660

fs-verity: replace ioctl(FS_IOC_MEASURE_VERITY) with statx()

This CL replaces the open(file) + ioctl(FS_IOC_MEASURE_VERITY) with
statx() to improve performance. This is because opening fs-verity files
is expensive.

This CL assumes that statx(STATX_ATTR_VERITY) is supported by the kernel.
This is the case for all the Android common kernels that support
fs-verity.

Bug: 146676114
Test: atest com.android.apkverity.ApkVerityTest
      All 17 tests passed
      Tested on Cuttlefish.
Change-Id: I21c70132682c0d4ae6922419b269aa9f5de2fb72