use devid instead of devuuid, add a Mapping struct

1 files changed, 17 insertions, 1 deletions

diff --git a/pkg/btrfs/btrfsitem/item_chunk.go b/pkg/btrfs/btrfsitem/item_chunk.go
index a77ae33..efd9d31 100644
--- a/pkg/btrfs/btrfsitem/item_chunk.go
+++ b/pkg/btrfs/btrfsitem/item_chunk.go
@@ -32,12 +32,28 @@ type ChunkHeader struct {
 }
 
 type ChunkStripe struct {
-	DeviceID      internal.ObjID        `bin:"off=0x0,  siz=0x8"`
+	DeviceID      btrfsvol.DeviceID     `bin:"off=0x0,  siz=0x8"`
 	Offset        btrfsvol.PhysicalAddr `bin:"off=0x8,  siz=0x8"`
 	DeviceUUID    util.UUID             `bin:"off=0x10, siz=0x10"`
 	binstruct.End `bin:"off=0x20"`
 }
 
+func (chunk Chunk) Mappings(key internal.Key) []btrfsvol.Mapping {
+	ret := make([]btrfsvol.Mapping, 0, len(chunk.Stripes))
+	for _, stripe := range chunk.Stripes {
+		ret = append(ret, btrfsvol.Mapping{
+			LAddr: btrfsvol.LogicalAddr(key.Offset),
+			PAddr: btrfsvol.QualifiedPhysicalAddr{
+				Dev:  stripe.DeviceID,
+				Addr: stripe.Offset,
+			},
+			Size:  chunk.Head.Size,
+			Flags: &chunk.Head.Type,
+		})
+	}
+	return ret
+}
+
 func (chunk *Chunk) UnmarshalBinary(dat []byte) (int, error) {
 	n, err := binstruct.Unmarshal(dat, &chunk.Head)
 	if err != nil {