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authorMark Fasheh <mark.fasheh@oracle.com>2007-02-10 05:24:12 +0100
committerMark Fasheh <mark.fasheh@oracle.com>2007-04-27 00:02:08 +0200
commit9517bac6cc7a7aa4fee63cb38a32cb6014e264c7 (patch)
tree3cac0c18d0cacc316e0e8a60f483282d6f991779 /fs/ocfs2/extent_map.h
parentocfs2: Turn off shared writeable mmap for local files systems with holes. (diff)
downloadlinux-9517bac6cc7a7aa4fee63cb38a32cb6014e264c7.tar.xz
linux-9517bac6cc7a7aa4fee63cb38a32cb6014e264c7.zip
ocfs2: teach ocfs2_file_aio_write() about sparse files
Unfortunately, ocfs2 can no longer make use of generic_file_aio_write_nlock() because allocating writes will require zeroing of pages adjacent to the I/O for cluster sizes greater than page size. Implement a custom file write here, which can order page locks for zeroing. This also has the advantage that cluster locks can easily be ordered outside of the page locks. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/extent_map.h')
-rw-r--r--fs/ocfs2/extent_map.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h
index 036e23251448..625d0ee5e04a 100644
--- a/fs/ocfs2/extent_map.h
+++ b/fs/ocfs2/extent_map.h
@@ -25,6 +25,8 @@
#ifndef _EXTENT_MAP_H
#define _EXTENT_MAP_H
+int ocfs2_get_clusters(struct inode *inode, u32 v_cluster, u32 *p_cluster,
+ u32 *num_clusters);
int ocfs2_extent_map_get_blocks(struct inode *inode, u64 v_blkno, u64 *p_blkno,
int *ret_count);