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| author | Mark Fasheh <mark.fasheh@oracle.com> | 2007-06-18 10:48:04 -0700 |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2007-07-10 17:32:00 -0700 |
| commit | 328d5752e1259dfb29b7e65f6c2d145fddbaa750 (patch) | |
| tree | 08198271a0382cafcc4c0de2fc1efcf35cb400af /fs/ocfs2/ocfs2_fs.h | |
| parent | c3afcbb34426a9291e4c038540129053a72c3cd8 (diff) | |
| download | linux-328d5752e1259dfb29b7e65f6c2d145fddbaa750.tar.gz linux-328d5752e1259dfb29b7e65f6c2d145fddbaa750.tar.bz2 linux-328d5752e1259dfb29b7e65f6c2d145fddbaa750.zip | |
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.h | 7 |
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 @@ #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. */ |