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| author | Eric Biggers <ebiggers@google.com> | 2019-05-20 09:29:48 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2019-05-28 10:27:53 -0700 |
| commit | ffceeefb337b3ba9da36633072490caa96289345 (patch) | |
| tree | 0849a49406848038682382fabe20684ff0cccdd2 /fs/crypto | |
| parent | aa8bc1ac6ef32a332671ca25e06cfd277a3839a5 (diff) | |
| download | linux-ffceeefb337b3ba9da36633072490caa96289345.tar.bz2 | |
fscrypt: decrypt only the needed blocks in __fscrypt_decrypt_bio()
In __fscrypt_decrypt_bio(), only decrypt the blocks that actually
comprise the bio, rather than assuming blocksize == PAGE_SIZE and
decrypting the entirety of every page used in the bio.
This is in preparation for allowing encryption on ext4 filesystems with
blocksize != PAGE_SIZE.
This is based on work by Chandan Rajendra.
Reviewed-by: Chandan Rajendra <chandan@linux.ibm.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/crypto')
| -rw-r--r-- | fs/crypto/bio.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c index 61da06fda45c..82da2510721f 100644 --- a/fs/crypto/bio.c +++ b/fs/crypto/bio.c @@ -33,8 +33,8 @@ static void __fscrypt_decrypt_bio(struct bio *bio, bool done) bio_for_each_segment_all(bv, bio, iter_all) { struct page *page = bv->bv_page; - int ret = fscrypt_decrypt_pagecache_blocks(page, PAGE_SIZE, 0); - + int ret = fscrypt_decrypt_pagecache_blocks(page, bv->bv_len, + bv->bv_offset); if (ret) SetPageError(page); else if (done) |