From: Chandan Rajendra <chandan@linux.vnet.ibm.com>
To: linux-ext4@vger.kernel.org
Cc: Chandan Rajendra <chandan@linux.vnet.ibm.com>,
linux-fsdevel@vger.kernel.org, ebiggers3@gmail.com,
linux-fscrypt@vger.kernel.org, tytso@mit.edu
Subject: [RFC PATCH V2 06/11] ext4: Decrypt the block that needs to be partially zeroed
Date: Mon, 12 Feb 2018 15:13:42 +0530 [thread overview]
Message-ID: <20180212094347.22071-7-chandan@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180212094347.22071-1-chandan@linux.vnet.ibm.com>
__ext4_block_zero_page_range decrypts the entire page. This commit
changes the code to decrypt the block that needs to be partially zeroed
instead of the whole page.
Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
---
fs/ext4/inode.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 180dd2d..aac0e04 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4034,9 +4034,10 @@ static int __ext4_block_zero_page_range(handle_t *handle,
ext4_encrypted_inode(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_block(page->mapping->host,
- page, PAGE_SIZE, 0, page->index));
+ page, blocksize,
+ round_down(offset, blocksize),
+ iblock));
}
}
if (ext4_should_journal_data(inode)) {
--
2.9.5
next prev parent reply other threads:[~2018-02-12 9:42 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-12 9:43 [RFC PATCH V2 00/11] Ext4 encryption support for blocksize < pagesize Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 01/11] ext4: Clear BH_Uptodate flag on decryption error Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 02/11] fs/buffer.c: Export end_buffer_async_read and create_page_buffers Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 03/11] fs/crypto/: Rename functions to indicate that they operate on FS blocks Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 04/11] completion_pages: Decrypt all contiguous blocks in a page Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 05/11] ext4: Decrypt all boundary blocks when doing buffered write Chandan Rajendra
2018-02-12 9:43 ` Chandan Rajendra [this message]
2018-02-12 9:43 ` [RFC PATCH V2 07/11] fscrypt_zeroout_range: Encrypt all zeroed out blocks of a page Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 08/11] Enable reading encrypted files in blocksize less than pagesize setup Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 09/11] fscrypt: Move completion_pages to crypto/readpage.c Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 10/11] Enable writing encrypted files in blocksize less than pagesize setup Chandan Rajendra
2018-02-12 9:43 ` [RFC PATCH V2 11/11] ext4: Enable encryption for blocksize less than page size Chandan Rajendra
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