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| author | Eric Biggers <ebiggers@google.com> | 2018-04-18 21:09:47 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-05-03 00:30:57 +0300 |
| commit | 0cb8dae4a0df2a977847c2dc6766a7783ce50f9d (patch) | |
| tree | 31a349816ada3856f84a1be5639e1192236a698b /fs/crypto/crypto.c | |
| parent | 2d618bdf71635463a4aa4ad0fe46ec852292bc0c (diff) | |
| download | linux-0cb8dae4a0df2a977847c2dc6766a7783ce50f9d.tar.xz | |
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 'fs/crypto/crypto.c')
| -rw-r--r-- | fs/crypto/crypto.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index ce654526c0fb..0758d32ad01b 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -45,12 +45,18 @@ static mempool_t *fscrypt_bounce_page_pool = NULL; static LIST_HEAD(fscrypt_free_ctxs); static DEFINE_SPINLOCK(fscrypt_ctx_lock); -struct workqueue_struct *fscrypt_read_workqueue; +static struct workqueue_struct *fscrypt_read_workqueue; static DEFINE_MUTEX(fscrypt_init_mutex); static struct kmem_cache *fscrypt_ctx_cachep; struct kmem_cache *fscrypt_info_cachep; +void fscrypt_enqueue_decrypt_work(struct work_struct *work) +{ + queue_work(fscrypt_read_workqueue, work); +} +EXPORT_SYMBOL(fscrypt_enqueue_decrypt_work); + /** * fscrypt_release_ctx() - Releases an encryption context * @ctx: The encryption context to release. |