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authorTao Ma <tao.ma@oracle.com>2009-08-25 08:05:12 +0800
committerJoel Becker <joel.becker@oracle.com>2009-09-22 20:09:36 -0700
commit6f70fa519976a379d72781d927cf8e5f5b05ec86 (patch)
tree563cdeb116f2016c3c4b7a627a51f0a85eec1566 /fs/ocfs2/aops.c
parentbcbbb24a6a5c5b3e7b8e5284e0bfa23f45c32377 (diff)
downloadblackbird-op-linux-6f70fa519976a379d72781d927cf8e5f5b05ec86.tar.gz
blackbird-op-linux-6f70fa519976a379d72781d927cf8e5f5b05ec86.zip
ocfs2: Add CoW support.
This patch try CoW support for a refcounted record. the whole process will be: 1. Calculate how many clusters we need to CoW and where we start. Extents that are not completely encompassed by the write will be broken on 1MB boundaries. 2. Do CoW for the clusters with the help of page cache. 3. Change the b-tree structure with the new allocated clusters. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/aops.c')
-rw-r--r--fs/ocfs2/aops.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 15c594dfd951..fdad075fed61 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -126,8 +126,8 @@ bail:
return err;
}
-static int ocfs2_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
+int ocfs2_get_block(struct inode *inode, sector_t iblock,
+ struct buffer_head *bh_result, int create)
{
int err = 0;
unsigned int ext_flags;
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