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authorYan Zheng <zheng.yan@oracle.com>2008-10-30 14:25:28 -0400
committerChris Mason <chris.mason@oracle.com>2008-10-30 14:25:28 -0400
commitd899e05215178fed903ad0e7fc1cb4d8e0cc0a88 (patch)
tree2969e3558f5c50ec0f9ac4201099c0d5d1d6e2c2 /fs/btrfs/extent_map.h
parent80ff385665b7fca29fefe358a60ab0d09f9b8e87 (diff)
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.h1
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 @@
12#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */ 12#define EXTENT_FLAG_PINNED 0 /* this entry not yet on disk, don't free it */
13#define EXTENT_FLAG_COMPRESSED 1 13#define EXTENT_FLAG_COMPRESSED 1
14#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */ 14#define EXTENT_FLAG_VACANCY 2 /* no file extent item found */
15#define EXTENT_FLAG_PREALLOC 3 /* pre-allocated extent */
15 16
16struct extent_map { 17struct extent_map {
17 struct rb_node rb_node; 18 struct rb_node rb_node;