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| author | Chandan Rajendra <chandan@linux.ibm.com> | 2019-05-20 09:29:51 -0700 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2019-05-28 10:27:53 -0700 |
| commit | ec39a36867440995c9675b2800f5ddaeb51b024e (patch) | |
| tree | 6dc5eeac5604c948473efc01a47c367606978cd9 /fs/ext4 | |
| parent | 0b578f358a6a7afee2ddc48dd39c2972726187de (diff) | |
| download | linux-ec39a36867440995c9675b2800f5ddaeb51b024e.tar.bz2 | |
ext4: decrypt only the needed block in __ext4_block_zero_page_range()
In __ext4_block_zero_page_range(), only decrypt the block that actually
needs to be decrypted, rather than assuming blocksize == PAGE_SIZE and
decrypting the whole page.
This is in preparation for allowing encryption on ext4 filesystems with
blocksize != PAGE_SIZE.
Signed-off-by: Chandan Rajendra <chandan@linux.ibm.com>
(EB: rebase onto previous changes, improve the commit message, and use
bh_offset())
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/inode.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 8e48feddad83..f65357735a1a 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4075,9 +4075,8 @@ static int __ext4_block_zero_page_range(handle_t *handle, if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode)) { /* We expect the key to be set. */ BUG_ON(!fscrypt_has_encryption_key(inode)); - BUG_ON(blocksize != PAGE_SIZE); WARN_ON_ONCE(fscrypt_decrypt_pagecache_blocks( - page, PAGE_SIZE, 0)); + page, blocksize, bh_offset(bh))); } } if (ext4_should_journal_data(inode)) { |