BACKPORT: FROMLIST: ext4: add inline encryption support
Wire up ext4 to support inline encryption via the helper functions which fs/crypto/ now provides. This includes: - Adding a mount option 'inlinecrypt' which enables inline encryption on encrypted files where it can be used. - Setting the bio_crypt_ctx on bios that will be submitted to an inline-encrypted file. Note: submit_bh_wbc() in fs/buffer.c also needed to be patched for this part, since ext4 sometimes uses ll_rw_block() on file data. - Not adding logically discontiguous data to bios that will be submitted to an inline-encrypted file. - Not doing filesystem-layer crypto on inline-encrypted files. Bug: 137270441 Test: tested as series; see I26aac0ac7845a9064f28bb1421eb2522828a6dec Change-Id: I54a8efe388289918f4144d8138fb87aa507ae760 Signed-off-by:Eric Biggers <ebiggers@google.com> Signed-off-by:
Satya Tangirala <satyat@google.com> Link: https://patchwork.kernel.org/patch/11214781/
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