From 328d5752e1259dfb29b7e65f6c2d145fddbaa750 Mon Sep 17 00:00:00 2001 From: Mark Fasheh Date: Mon, 18 Jun 2007 10:48:04 -0700 Subject: ocfs2: btree changes for unwritten extents Writes to a region marked as unwritten might result in a record split or merge. We can support splits by making minor changes to the existing insert code. Merges require left rotations which mostly re-use right rotation support functions. Signed-off-by: Mark Fasheh --- fs/ocfs2/ocfs2_fs.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'fs/ocfs2/ocfs2_fs.h') diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h index f0d9eb08547..c20a74b99d8 100644 --- a/fs/ocfs2/ocfs2_fs.h +++ b/fs/ocfs2/ocfs2_fs.h @@ -88,7 +88,7 @@ #define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) -#define OCFS2_FEATURE_RO_COMPAT_SUPP 0 +#define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN /* * Heartbeat-only devices are missing journals and other files. The @@ -116,6 +116,11 @@ */ #define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 +/* + * Unwritten extents support. + */ +#define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001 + /* The byte offset of the first backup block will be 1G. * The following will be 4G, 16G, 64G, 256G and 1T. */ -- cgit v1.2.3