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| author | Yan Zheng <zheng.yan@oracle.com> | 2008-10-30 19:25:28 +0100 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-10-30 19:25:28 +0100 |
| commit | d899e05215178fed903ad0e7fc1cb4d8e0cc0a88 (patch) | |
| tree | 2969e3558f5c50ec0f9ac4201099c0d5d1d6e2c2 /fs/btrfs/extent_map.h | |
| parent | Btrfs: update nodatacow code v2 (diff) | |
| download | linux-d899e05215178fed903ad0e7fc1cb4d8e0cc0a88.tar.xz linux-d899e05215178fed903ad0e7fc1cb4d8e0cc0a88.zip | |
Btrfs: Add fallocate support v2
This patch updates btrfs-progs for fallocate support.
fallocate is a little different in Btrfs because we need to tell the
COW system that a given preallocated extent doesn't need to be
cow'd as long as there are no snapshots of it. This leverages the
-o nodatacow checks.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
| -rw-r--r-- | fs/btrfs/extent_map.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index e693e1b4ac4a..accfedaeb513 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -12,6 +12,7 @@ #define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */ #define EXTENT_FLAG_COMPRESSED 1 #define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ +#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */ struct extent_map { struct rb_node rb_node; |