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[76.182.20.124]) by smtp.gmail.com with ESMTPSA id d82-20020a254f55000000b00dbd9eee633dsm2967630ybb.59.2024.01.24.09.19.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jan 2024 09:19:27 -0800 (PST) From: Josef Bacik To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v5 06/52] fscrypt: add a process_bio hook to fscrypt_operations Date: Wed, 24 Jan 2024 12:18:28 -0500 Message-ID: <2c638e5fa1b7868dbf79d932b15364c3c30ca9de.1706116485.git.josef@toxicpanda.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- fs/crypto/inline_crypt.c | 3 ++- include/linux/fscrypt.h | 14 ++++++++++++++ 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/fs/crypto/inline_crypt.c b/fs/crypto/inline_crypt.c index 52c4a24e2657..b8598007b1be 100644 --- a/fs/crypto/inline_crypt.c +++ b/fs/crypto/inline_crypt.c @@ -171,7 +171,8 @@ int fscrypt_prepare_inline_crypt_key(struct fscrypt_prepared_key *prep_key, err = blk_crypto_init_key(blk_key, raw_key, crypto_mode, fscrypt_get_dun_bytes(ci), - 1U << ci->ci_data_unit_bits, NULL); + 1U << ci->ci_data_unit_bits, + 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 22211f87e7be..ea3033956208 100644 --- a/include/linux/fscrypt.h +++ b/include/linux/fscrypt.h @@ -16,6 +16,7 @@ #include #include #include +#include #include /* @@ -199,6 +200,19 @@ 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; }; static inline struct fscrypt_inode_info * -- 2.43.0