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| author | Li Zefan <lizf@cn.fujitsu.com> | 2011-04-15 03:02:49 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-05-14 16:10:26 -0400 |
| commit | e1e8fb6a1ff3f9487e03a4cbf85b81d1316068ce (patch) | |
| tree | a7cd1ba1f93d163e2ca02b8172888f43e444713f /include/linux/fs.h | |
| parent | 1aba86d67f340a8001d67183ec32e8a62e3ec658 (diff) | |
| download | op-kernel-dev-e1e8fb6a1ff3f9487e03a4cbf85b81d1316068ce.zip op-kernel-dev-e1e8fb6a1ff3f9487e03a4cbf85b81d1316068ce.tar.gz | |
fs: remove FS_COW_FL
FS_COW_FL and FS_NOCOW_FL were newly introduced to control per file
COW in btrfs, but FS_NOCOW_FL is sufficient.
The fact is we don't have corresponding BTRFS_INODE_COW flag.
COW is default, and FS_NOCOW_FL can be used to switch off COW for
a single file.
If we mount btrfs with nodatacow, a newly created file will be set with
the FS_NOCOW_FL flag. So to turn on COW for it, we can just clear the
FS_NOCOW_FL flag.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index de9dd81..56a4141 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -365,7 +365,6 @@ struct inodes_stat_t { #define FS_EXTENT_FL 0x00080000 /* Extents */ #define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */ #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ -#define FS_COW_FL 0x02000000 /* Cow file */ #define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ #define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
