diff options
| author | Eric Biggers <ebiggers@google.com> | 2018-04-18 11:09:47 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-04-19 21:59:42 -0700 |
| commit | 13890bed2032a3d92ea25df2ffe42b54d329f60d (patch) | |
| tree | df1a056f1692ca3d451a2ec099d55fdedc79d944 /include | |
| parent | 42bf67fc543bc5945b355ad38f40cd84c3886786 (diff) | |
fscrypt: allow synchronous bio decryption
Currently, fscrypt provides fscrypt_decrypt_bio_pages() which decrypts a
bio's pages asynchronously, then unlocks them afterwards. But, this
assumes that decryption is the last "postprocessing step" for the bio,
so it's incompatible with additional postprocessing steps such as
authenticity verification after decryption.
Therefore, rename the existing fscrypt_decrypt_bio_pages() to
fscrypt_enqueue_decrypt_bio(). Then, add fscrypt_decrypt_bio() which
decrypts the pages in the bio synchronously without unlocking the pages,
nor setting them Uptodate; and add fscrypt_enqueue_decrypt_work(), which
enqueues work on the fscrypt_read_workqueue. The new functions will be
used by filesystems that support both fscrypt and fs-verity.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/fscrypt_notsupp.h | 13 | ||||
| -rw-r--r-- | include/linux/fscrypt_supp.h | 5 |
2 files changed, 14 insertions, 4 deletions
diff --git a/include/linux/fscrypt_notsupp.h b/include/linux/fscrypt_notsupp.h index 5777251400f9..44bd4fbd3ec5 100644 --- a/include/linux/fscrypt_notsupp.h +++ b/include/linux/fscrypt_notsupp.h @@ -24,6 +24,10 @@ static inline bool fscrypt_dummy_context_enabled(struct inode *inode) } /* crypto.c */ +static inline void fscrypt_enqueue_decrypt_work(struct work_struct *work) +{ +} + static inline struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode, gfp_t gfp_flags) { @@ -160,10 +164,13 @@ static inline bool fscrypt_match_name(const struct fscrypt_name *fname, } /* bio.c */ -static inline void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *ctx, - struct bio *bio) +static inline void fscrypt_decrypt_bio(struct bio *bio) +{ +} + +static inline void fscrypt_enqueue_decrypt_bio(struct fscrypt_ctx *ctx, + struct bio *bio) { - return; } static inline void fscrypt_pullback_bio_page(struct page **page, bool restore) diff --git a/include/linux/fscrypt_supp.h b/include/linux/fscrypt_supp.h index c88d2058902a..9d1857302b73 100644 --- a/include/linux/fscrypt_supp.h +++ b/include/linux/fscrypt_supp.h @@ -58,6 +58,7 @@ static inline bool fscrypt_dummy_context_enabled(struct inode *inode) } /* crypto.c */ +extern void fscrypt_enqueue_decrypt_work(struct work_struct *); extern struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *, gfp_t); extern void fscrypt_release_ctx(struct fscrypt_ctx *); extern struct page *fscrypt_encrypt_page(const struct inode *, struct page *, @@ -187,7 +188,9 @@ static inline bool fscrypt_match_name(const struct fscrypt_name *fname, } /* bio.c */ -extern void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *, struct bio *); +extern void fscrypt_decrypt_bio(struct bio *); +extern void fscrypt_enqueue_decrypt_bio(struct fscrypt_ctx *ctx, + struct bio *bio); extern void fscrypt_pullback_bio_page(struct page **, bool); extern int fscrypt_zeroout_range(const struct inode *, pgoff_t, sector_t, unsigned int); |