From: Chandan Rajendra <chandan@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
(EB: rebase onto previous changes, improve the commit message, and use
bh_offset())
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
fs/ext4/inode.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d24c50e4598f0..58597db621e1e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4073,9 +4073,8 @@ 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)) {
--
2.21.0.593.g511ec345e18-goog
