From: Josef Bacik <[email protected]> This will allow file systems to set a process_bio hook for inline encryption. This will be utilized by btrfs in order to make sure the checksumming work is done on the encrypted bio's.
Signed-off-by: Josef Bacik <[email protected]> Signed-off-by: Daniel Vacek <[email protected]> --- v5: https://lore.kernel.org/linux-btrfs/2c638e5fa1b7868dbf79d932b15364c3c30ca9de.1706116485.git.jo...@toxicpanda.com/ * No changes since. --- fs/crypto/inline_crypt.c | 2 +- include/linux/fscrypt.h | 14 ++++++++++++++ 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/fs/crypto/inline_crypt.c b/fs/crypto/inline_crypt.c index d737fb6ff011..fc1aa5b00af1 100644 --- a/fs/crypto/inline_crypt.c +++ b/fs/crypto/inline_crypt.c @@ -179,7 +179,7 @@ int fscrypt_prepare_inline_crypt_key(struct fscrypt_prepared_key *prep_key, err = blk_crypto_init_key(blk_key, key_bytes, key_size, key_type, crypto_mode, fscrypt_get_dun_bytes(ci), 1U << ci->ci_data_unit_bits, - NULL); + sb->s_cop->process_bio); if (err) { fscrypt_err(inode, "error %d initializing blk-crypto key", err); goto fail; diff --git a/include/linux/fscrypt.h b/include/linux/fscrypt.h index dba5ca122775..e3bb9e3756e1 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -16,6 +16,7 @@ #include <linux/fs.h> #include <linux/mm.h> #include <linux/slab.h> +#include <linux/blk-crypto.h> #include <uapi/linux/fscrypt.h> /* @@ -205,6 +206,19 @@ struct fscrypt_operations { */ struct block_device **(*get_devices)(struct super_block *sb, unsigned int *num_devs); + + /* + * A callback if the file system requires the ability to process the + * encrypted bio, used only with inline encryption. + * + * @orig_bio: the original bio submitted. + * @enc_bio: the encrypted bio. + * + * For writes the enc_bio will be different from the orig_bio, for reads + * they will be the same. For reads we get the bio before it is + * decrypted, for writes we get the bio before it is submitted. + */ + blk_crypto_process_bio_t process_bio; }; int fscrypt_d_revalidate(struct inode *dir, const struct qstr *name, -- 2.51.0
