early work to file_write in big extents

1 files changed, 12 insertions, 0 deletions

diff --git a/ctree.h b/ctree.h
index fb1f5d51..5cf28be9 100644
--- a/ctree.h
+++ b/ctree.h
@@ -223,6 +223,7 @@ struct btrfs_file_extent_item {
 } __attribute__ ((__packed__));
 
 struct btrfs_csum_item {
+	__le64 extent_offset;
 	u8 csum[BTRFS_CSUM_SIZE];
 } __attribute__ ((__packed__));
 
@@ -911,6 +912,17 @@ static inline void btrfs_set_file_extent_num_blocks(struct
 	e->num_blocks = cpu_to_le64(val);
 }
 
+static inline u64 btrfs_csum_extent_offset(struct btrfs_csum_item *c)
+{
+	return le64_to_cpu(c->extent_offset);
+}
+
+static inline void btrfs_set_csum_extent_offset(struct btrfs_csum_item *c,
+						u64 val)
+{
+	c->extent_offset = cpu_to_le64(val);
+}
+
 static inline u16 btrfs_device_pathlen(struct btrfs_device_item *d)
 {
 	return le16_to_cpu(d->pathlen);