"We then modified the inline encryption block driver to pass this to the hardware. As with ext4 encryption, keys are managed by the Linux keyring. To see our im

"We then modified the inline encryption block driver to pass this to the hardware. As with ext4 encryption, keys are managed by the Linux keyring. To see our implementation, take a look at the source code for the Pixel kernel." It doesn't sound like they got these changes into mainline. They link here to their source: https://android.googlesource.com/kernel/msm/+/android-msm-marlin-3.18-nougat-dr1/fs/ext4/crypto_key.c https://android.googlesource.com/kernel/msm/+/android-msm-ma... From that file: /* TODO(mhalcrow): Just for proof-of-concept */ WHOOPS!