better node reading/writing

1 files changed, 9 insertions, 9 deletions

diff --git a/pkg/btrfs/btrfsitem/item_chunk.go b/pkg/btrfs/btrfsitem/item_chunk.go
index 8ffc83b..eb3a16d 100644
--- a/pkg/btrfs/btrfsitem/item_chunk.go
+++ b/pkg/btrfs/btrfsitem/item_chunk.go
@@ -14,15 +14,15 @@ type Chunk struct { // CHUNK_ITEM=228
 }
 
 type ChunkHeader struct {
-	Size           uint64          `bin:"off=0x0,  siz=0x8"` // size of chunk (bytes)
-	Owner          internal.ObjID  `bin:"off=0x8,  siz=0x8"` // root referencing this chunk (2)
-	StripeLen      uint64          `bin:"off=0x10, siz=0x8"` // stripe length
-	Type           BlockGroupFlags `bin:"off=0x18, siz=0x8"` // type (same as flags for block group?)
-	IOOptimalAlign uint32          `bin:"off=0x20, siz=0x4"` // optimal io alignment
-	IOOptimalWidth uint32          `bin:"off=0x24, siz=0x4"` // optimal io width
-	IOMinSize      uint32          `bin:"off=0x28, siz=0x4"` // minimal io size (sector size)
-	NumStripes     uint16          `bin:"off=0x2c, siz=0x2"` // number of stripes
-	SubStripes     uint16          `bin:"off=0x2e, siz=0x2"` // sub stripes
+	Size           uint64          `bin:"off=0x0,  siz=0x8"`
+	Owner          internal.ObjID  `bin:"off=0x8,  siz=0x8"` // root referencing this chunk (always EXTENT_TREE_OBJECTID=2)
+	StripeLen      uint64          `bin:"off=0x10, siz=0x8"` // ???
+	Type           BlockGroupFlags `bin:"off=0x18, siz=0x8"`
+	IOOptimalAlign uint32          `bin:"off=0x20, siz=0x4"`
+	IOOptimalWidth uint32          `bin:"off=0x24, siz=0x4"`
+	IOMinSize      uint32          `bin:"off=0x28, siz=0x4"` // sector size
+	NumStripes     uint16          `bin:"off=0x2c, siz=0x2"` // [ignored-when-writing]
+	SubStripes     uint16          `bin:"off=0x2e, siz=0x2"` // ???
 	binstruct.End  `bin:"off=0x30"`
 }