From 67aab484a523dfcbf32f4fc68ace2474ade96a5f Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@lukeshu.com>
Date: Sat, 4 Jun 2022 22:53:09 -0600
Subject: more

---
 pkg/btrfs/btrfsitem/item_blockgroup.go | 38 ++++++++++++++++++++++++++++++++++
 pkg/btrfs/btrfsitem/item_chunk.go      | 18 ++++++++--------
 2 files changed, 47 insertions(+), 9 deletions(-)
 create mode 100644 pkg/btrfs/btrfsitem/item_blockgroup.go

(limited to 'pkg')

diff --git a/pkg/btrfs/btrfsitem/item_blockgroup.go b/pkg/btrfs/btrfsitem/item_blockgroup.go
new file mode 100644
index 0000000..162adb1
--- /dev/null
+++ b/pkg/btrfs/btrfsitem/item_blockgroup.go
@@ -0,0 +1,38 @@
+package btrfsitem
+
+import (
+	"lukeshu.com/btrfs-tools/pkg/util"
+)
+
+type BlockGroupFlags uint64
+
+const (
+	BLOCK_GROUP_DATA = BlockGroupFlags(1 << iota)
+	BLOCK_GROUP_SYSTEM
+	BLOCK_GROUP_METADATA
+	BLOCK_GROUP_RAID0
+	BLOCK_GROUP_RAID1
+	BLOCK_GROUP_DUP
+	BLOCK_GROUP_RAID10
+	BLOCK_GROUP_RAID5
+	BLOCK_GROUP_RAID6
+	BLOCK_GROUP_RAID1C3
+	BLOCK_GROUP_RAID1C4
+)
+
+var blockGroupFlagNames = []string{
+	"DATA",
+	"SYSTEM",
+	"METADATA",
+	"RAID0",
+	"RAID1",
+	"DUP",
+	"RAID10",
+	"RAID5",
+	"RAID6",
+	"RAID1C3",
+	"RAID1C4",
+}
+
+func (f BlockGroupFlags) Has(req BlockGroupFlags) bool { return f&req == req }
+func (f BlockGroupFlags) String() string               { return util.BitfieldString(f, blockGroupFlagNames) }
diff --git a/pkg/btrfs/btrfsitem/item_chunk.go b/pkg/btrfs/btrfsitem/item_chunk.go
index 7bb65b1..826ecc6 100644
--- a/pkg/btrfs/btrfsitem/item_chunk.go
+++ b/pkg/btrfs/btrfsitem/item_chunk.go
@@ -9,15 +9,15 @@ import (
 
 type Chunk struct { // CHUNK_ITEM=228
 	// Maps logical address to physical.
-	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           uint64         `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"` // 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
 	binstruct.End  `bin:"off=0x30"`
 	Stripes        []ChunkStripe `bin:"-"`
 }
-- 
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