diff options
| author | Suparna Bhattacharya <suparna@in.ibm.com> | 2006-10-11 04:21:06 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-11 14:14:16 -0400 |
| commit | 471d4011a9862efff02094388b8fe8cd67683c38 (patch) | |
| tree | 7ec2cdd632cf4076517d3c81044643ac65528b9b /include | |
| parent | f65e6fba163dfd0f962efb7d8f5528b6872e2b15 (diff) | |
[PATCH] ext4: uninitialised extent handling
Make it possible to add file preallocation support in future as an RO_COMPAT
feature by recognizing uninitialized extents as holes and limiting extent
length to keep the top bit of ee_len free for marking uninitialized extents.
Signed-off-by: Suparna Bhattacharya <suparna@in.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ext4_fs_extents.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ext4_fs_extents.h b/include/linux/ext4_fs_extents.h index facc76684d4f..0eba0acf6ba6 100644 --- a/include/linux/ext4_fs_extents.h +++ b/include/linux/ext4_fs_extents.h | |||
| @@ -141,6 +141,8 @@ typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *, | |||
| 141 | 141 | ||
| 142 | #define EXT_MAX_BLOCK 0xffffffff | 142 | #define EXT_MAX_BLOCK 0xffffffff |
| 143 | 143 | ||
| 144 | #define EXT_MAX_LEN ((1UL << 15) - 1) | ||
| 145 | |||
| 144 | 146 | ||
| 145 | #define EXT_FIRST_EXTENT(__hdr__) \ | 147 | #define EXT_FIRST_EXTENT(__hdr__) \ |
| 146 | ((struct ext4_extent *) (((char *) (__hdr__)) + \ | 148 | ((struct ext4_extent *) (((char *) (__hdr__)) + \ |