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>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index e6d9bc54c2b1..260bf95dfe0c 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -68,6 +68,8 @@ struct btrfs_ordered_sum {
 
 #define BTRFS_ORDERED_COMPRESSED 3 /* writing a compressed extent */
 
+#define BTRFS_ORDERED_PREALLOC 4 /* set when writing to prealloced extent */
+
 struct btrfs_ordered_extent {
         /* logical offset in the file */
         u64 file_offset;
@@ -132,7 +134,7 @@ int btrfs_remove_ordered_extent(struct inode *inode,
 int btrfs_dec_test_ordered_pending(struct inode *inode,
                                        u64 file_offset, u64 io_size);
 int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
-                             u64 start, u64 len, u64 disk_len, int type);
+                             u64 start, u64 len, u64 disk_len, int tyep);
 int btrfs_add_ordered_sum(struct inode *inode,
                           struct btrfs_ordered_extent *entry,
                           struct btrfs_ordered_sum *sum);