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authorMark Fasheh <mark.fasheh@oracle.com>2007-06-18 13:48:04 -0400
committerMark Fasheh <mark.fasheh@oracle.com>2007-07-10 20:32:00 -0400
commit328d5752e1259dfb29b7e65f6c2d145fddbaa750 (patch)
tree08198271a0382cafcc4c0de2fc1efcf35cb400af /fs/ocfs2/ocfs2_fs.h
parentc3afcbb34426a9291e4c038540129053a72c3cd8 (diff)
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 <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
-rw-r--r--fs/ocfs2/ocfs2_fs.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index f0d9eb08547a..c20a74b99d87 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -88,7 +88,7 @@
88#define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB 88#define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB
89#define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ 89#define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
90 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC) 90 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
91#define OCFS2_FEATURE_RO_COMPAT_SUPP 0 91#define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN
92 92
93/* 93/*
94 * Heartbeat-only devices are missing journals and other files. The 94 * Heartbeat-only devices are missing journals and other files. The
@@ -116,6 +116,11 @@
116 */ 116 */
117#define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 117#define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001
118 118
119/*
120 * Unwritten extents support.
121 */
122#define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001
123
119/* The byte offset of the first backup block will be 1G. 124/* The byte offset of the first backup block will be 1G.
120 * The following will be 4G, 16G, 64G, 256G and 1T. 125 * The following will be 4G, 16G, 64G, 256G and 1T.
121 */ 126 */