Hello, This patchset prepares fs/crypto/, and partially ext4, for the 'blocksize != PAGE_SIZE' case. This basically contains the encryption changes from Chandan Rajendra's patchset "[V2,00/13] Consolidate FS read I/O callbacks code" (https://patchwork.kernel.org/project/linux-fscrypt/list/?series=111039) that don't require introducing the read_callbacks and don't depend on fsverity stuff. But they've been reworked to clean things up a lot. I'd like to apply this patchset for 5.3 in order to make things forward for ext4 encryption with 'blocksize != PAGE_SIZE'. AFAICT, after this patchset the only thing stopping ext4 encryption from working with blocksize != PAGE_SIZE is the lack of encryption support in block_read_full_page(), which the read_callbacks will address. This patchset applies to v5.2-rc1, and it can also be retrieved from git at https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git branch "fscrypt-subpage-blocks-prep". Changed since v1 (minor cleanups only): - In "fscrypt: simplify bounce page handling", also remove the definition of FS_CTX_HAS_BOUNCE_BUFFER_FL. - In "ext4: decrypt only the needed blocks in ext4_block_write_begin()", simplify the code slightly by moving the IS_ENCRYPTED() check. - Change __fscrypt_decrypt_bio() in a separate patch rather than as part of "fscrypt: support decrypting multiple filesystem blocks per page". The resulting code is the same, so I kept Chandan's Reviewed-by. - Improve the commit message of "fscrypt: introduce fscrypt_decrypt_block_inplace()". Chandan Rajendra (3): ext4: clear BH_Uptodate flag on decryption error ext4: decrypt only the needed blocks in ext4_block_write_begin() ext4: decrypt only the needed block in __ext4_block_zero_page_range() Eric Biggers (11): fscrypt: simplify bounce page handling fscrypt: remove the "write" part of struct fscrypt_ctx fscrypt: rename fscrypt_do_page_crypto() to fscrypt_crypt_block() fscrypt: clean up some BUG_ON()s in block encryption/decryption fscrypt: introduce fscrypt_encrypt_block_inplace() fscrypt: support encrypting multiple filesystem blocks per page fscrypt: handle blocksize < PAGE_SIZE in fscrypt_zeroout_range() fscrypt: introduce fscrypt_decrypt_block_inplace() fscrypt: support decrypting multiple filesystem blocks per page fscrypt: decrypt only the needed blocks in __fscrypt_decrypt_bio() ext4: encrypt only up to last block in ext4_bio_write_page() fs/crypto/bio.c | 73 +++------ fs/crypto/crypto.c | 299 ++++++++++++++++++++---------------- fs/crypto/fscrypt_private.h | 15 +- fs/ext4/inode.c | 37 +++-- fs/ext4/page-io.c | 44 +++--- fs/f2fs/data.c | 17 +- fs/ubifs/crypto.c | 19 +-- include/linux/fscrypt.h | 96 ++++++++---- 8 files changed, 319 insertions(+), 281 deletions(-) -- 2.21.0.1020.gf2820cf01a-goog
