linux-ext4 - [PATCH RFC 10/30] ext4: snapshot file

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Date:	Mon,  9 May 2011 19:41:28 +0300
From:	amir73il@...rs.sourceforge.net
To:	linux-ext4@...r.kernel.org
Cc:	tytso@....edu, Amir Goldstein <amir73il@...rs.sf.net>,
	Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [PATCH RFC 10/30] ext4: snapshot file - read through to block device

From: Amir Goldstein <amir73il@...rs.sf.net>

On active snapshot page read, the function ext4_snapshot_get_block()
is called to map the page to a disk block.  If the page is not mapped
in the snapshot file a direct mapping to the block device is returned.

Signed-off-by: Amir Goldstein <amir73il@...rs.sf.net>
Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
 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 4ec5f02..3acdbe5 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4181,8 +4181,7 @@ static int ext4_no_writepage(struct page *page,
  * the snapshot COW bitmaps and a few initial blocks copied on snapshot_take().
  */
 static const struct address_space_operations ext4_snapfile_aops = {
-	.readpage		= ext4_readpage,
-	.readpages		= ext4_readpages,
+	.readpage		= ext4_snapshot_readpage,
 	.writepage		= ext4_no_writepage,
 	.bmap			= ext4_bmap,
 	.invalidatepage		= ext4_invalidatepage,
-- 
1.7.0.4

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