stuff

1 files changed, 0 insertions, 254 deletions

diff --git a/pkg/btrfs/structs.go b/pkg/btrfs/structs.go
deleted file mode 100644
index a3f7862..0000000
--- a/pkg/btrfs/structs.go
+++ /dev/null
@@ -1,254 +0,0 @@
-package btrfs
-
-import (
-	"time"
-
-	"lukeshu.com/btrfs-tools/pkg/binstruct"
-)
-
-type (
-	PhysicalAddr int64
-	LogicalAddr  int64
-	Generation   uint64
-)
-
-type Key struct {
-	ObjectID      ObjID  `bin:"off=0, siz=8"` // Object ID. Each tree has its own set of Object IDs.
-	ItemType      uint8  `bin:"off=8, siz=1"` // Item type.
-	Offset        uint64 `bin:"off=9, siz=8"` // Offset. The meaning depends on the item type.
-	binstruct.End `bin:"off=11"`
-}
-
-type Time struct {
-	Sec           int64  `bin:"off=0, siz=8"` // Number of seconds since 1970-01-01T00:00:00Z.
-	NSec          uint64 `bin:"off=8, siz=4"` // Number of nanoseconds since the beginning of the second.
-	binstruct.End `bin:"off=c"`
-}
-
-func (t Time) ToStd() time.Time {
-	return time.Unix(t.Sec, int64(t.NSec))
-}
-
-type Superblock struct {
-	Checksum   CSum         `bin:"off=0,  siz=20"` // Checksum of everything past this field (from 20 to 1000)
-	FSUUID     UUID         `bin:"off=20, siz=10"` // FS UUID
-	Self       PhysicalAddr `bin:"off=30, siz=8"`  // physical address of this block (different for mirrors)
-	Flags      uint64       `bin:"off=38, siz=8"`  // flags
-	Magic      [8]byte      `bin:"off=40, siz=8"`  // magic ('_BHRfS_M')
-	Generation Generation   `bin:"off=48, siz=8"`
-
-	RootTree  LogicalAddr `bin:"off=50, siz=8"` // logical address of the root tree root
-	ChunkTree LogicalAddr `bin:"off=58, siz=8"` // logical address of the chunk tree root
-	LogTree   LogicalAddr `bin:"off=60, siz=8"` // logical address of the log tree root
-
-	LogRootTransID  uint64 `bin:"off=68, siz=8"` // log_root_transid
-	TotalBytes      uint64 `bin:"off=70, siz=8"` // total_bytes
-	BytesUsed       uint64 `bin:"off=78, siz=8"` // bytes_used
-	RootDirObjectID ObjID  `bin:"off=80, siz=8"` // root_dir_objectid (usually 6)
-	NumDevices      uint64 `bin:"off=88, siz=8"` // num_devices
-
-	SectorSize        uint32 `bin:"off=90, siz=4"`
-	NodeSize          uint32 `bin:"off=94, siz=4"`
-	LeafSize          uint32 `bin:"off=98, siz=4"` // unused; must be the same as NodeSize
-	StripeSize        uint32 `bin:"off=9c, siz=4"`
-	SysChunkArraySize uint32 `bin:"off=a0, siz=4"`
-
-	ChunkRootGeneration Generation    `bin:"off=a4, siz=8"`
-	CompatFlags         uint64        `bin:"off=ac, siz=8"` // compat_flags
-	CompatROFlags       uint64        `bin:"off=b4, siz=8"` // compat_ro_flags - only implementations that support the flags can write to the filesystem
-	IncompatFlags       IncompatFlags `bin:"off=bc, siz=8"` // incompat_flags - only implementations that support the flags can use the filesystem
-	ChecksumType        uint16        `bin:"off=c4, siz=2"` // csum_type - Btrfs currently uses the CRC32c little-endian hash function with seed -1.
-
-	RootLevel  uint8 `bin:"off=c6, siz=1"` // root_level
-	ChunkLevel uint8 `bin:"off=c7, siz=1"` // chunk_root_level
-	LogLevel   uint8 `bin:"off=c8, siz=1"` // log_root_level
-
-	DevItem            DevItem     `bin:"off=c9,  siz=62"`  // DEV_ITEM data for this device
-	Label              [0x100]byte `bin:"off=12b, siz=100"` // label (may not contain '/' or '\\')
-	CacheGeneration    Generation  `bin:"off=22b, siz=8"`
-	UUIDTreeGeneration uint64      `bin:"off=233, siz=8"` // uuid_tree_generation
-
-	// FeatureIncompatMetadataUUID
-	MetadataUUID UUID `bin:"off=23b, siz=10"`
-
-	// FeatureIncompatExtentTreeV2
-	NumGlobalRoots uint64 `bin:"off=24b, siz=8"`
-
-	// FeatureIncompatExtentTreeV2
-	BlockGroupRoot           ObjID      `bin:"off=253, siz=8"`
-	BlockGroupRootGeneration Generation `bin:"off=25b, siz=8"`
-	BlockGroupRootLevel      uint8      `bin:"off=263, siz=1"`
-
-	Reserved [199]byte `bin:"off=264, siz=c7"` // future expansion
-
-	SysChunkArray [0x800]byte   `bin:"off=32b, siz=800"` // sys_chunk_array:(n bytes valid) Contains (KEY . CHUNK_ITEM) pairs for all SYSTEM chunks. This is needed to bootstrap the mapping from logical addresses to physical.
-	SuperRoots    [4]RootBackup `bin:"off=b2b, siz=2a0"`
-
-	// Padded to 4096 bytes
-	Padding       [565]byte `bin:"off=dcb, siz=235"`
-	binstruct.End `bin:"off=1000"`
-}
-
-func (sb Superblock) CalculateChecksum() (CSum, error) {
-	data, err := binstruct.Marshal(sb)
-	if err != nil {
-		return CSum{}, err
-	}
-	return CRC32c(data[0x20:]), nil
-}
-
-func (sb Superblock) EffectiveMetadataUUID() UUID {
-	if !sb.IncompatFlags.Has(FeatureIncompatMetadataUUID) {
-		return sb.FSUUID
-	}
-	return sb.MetadataUUID
-}
-
-type SysChunk struct {
-	Key           `bin:"off=0, siz=11"`
-	ChunkItem     `bin:"off=11, siz=30"`
-	binstruct.End `bin:"off=41"`
-}
-
-func (sb Superblock) ParseSysChunkArray() ([]SysChunk, error) {
-	dat := sb.SysChunkArray[:sb.SysChunkArraySize]
-	var ret []SysChunk
-	for len(dat) > 0 {
-		var pair SysChunk
-		if err := binstruct.Unmarshal(dat, &pair); err != nil {
-			return nil, err
-		}
-		dat = dat[0x41:]
-
-		for i := 0; i < int(pair.ChunkItem.NumStripes); i++ {
-			var stripe ChunkItemStripe
-			if err := binstruct.Unmarshal(dat, &stripe); err != nil {
-				return nil, err
-			}
-			pair.ChunkItem.Stripes = append(pair.ChunkItem.Stripes, stripe)
-			dat = dat[0x20:]
-		}
-
-		ret = append(ret, pair)
-	}
-	return ret, nil
-}
-
-type RootBackup struct {
-	TreeRoot    ObjID      `bin:"off=0, siz=8"`
-	TreeRootGen Generation `bin:"off=8, siz=8"`
-
-	ChunkRoot    ObjID      `bin:"off=10, siz=8"`
-	ChunkRootGen Generation `bin:"off=18, siz=8"`
-
-	ExtentRoot    ObjID      `bin:"off=20, siz=8"`
-	ExtentRootGen Generation `bin:"off=28, siz=8"`
-
-	FSRoot    ObjID      `bin:"off=30, siz=8"`
-	FSRootGen Generation `bin:"off=38, siz=8"`
-
-	DevRoot    ObjID      `bin:"off=40, siz=8"`
-	DevRootGen Generation `bin:"off=48, siz=8"`
-
-	ChecksumRoot    ObjID      `bin:"off=50, siz=8"`
-	ChecksumRootGen Generation `bin:"off=58, siz=8"`
-
-	TotalBytes uint64 `bin:"off=60, siz=8"`
-	BytesUsed  uint64 `bin:"off=68, siz=8"`
-	NumDevices uint64 `bin:"off=70, siz=8"`
-
-	Unused [8 * 4]byte `bin:"off=78, siz=20"`
-
-	TreeRootLevel     uint8 `bin:"off=98, siz=1"`
-	ChunkRootLevel    uint8 `bin:"off=99, siz=1"`
-	ExtentRootLevel   uint8 `bin:"off=9a, siz=1"`
-	FSRootLevel       uint8 `bin:"off=9b, siz=1"`
-	DevRootLevel      uint8 `bin:"off=9c, siz=1"`
-	ChecksumRootLevel uint8 `bin:"off=9d, siz=1"`
-
-	Padding       [10]byte `bin:"off=9e, siz=a"`
-	binstruct.End `bin:"off=a8"`
-}
-
-type NodeHeader struct {
-	Checksum      CSum        `bin:"off=0,  siz=20"` // Checksum of everything after this field (from 20 to the end of the node)
-	MetadataUUID  UUID        `bin:"off=20, siz=10"` // FS UUID
-	Addr          LogicalAddr `bin:"off=30, siz=8"`  // Logical address of this node
-	Flags         uint64      `bin:"off=38, siz=8"`  // Flags
-	ChunkTreeUUID UUID        `bin:"off=40, siz=10"` // Chunk tree UUID
-	Generation    Generation  `bin:"off=50, siz=8"`  // Generation
-	Owner         TreeObjID   `bin:"off=58, siz=8"`  // The ID of the tree that contains this node
-	NumItems      uint32      `bin:"off=60, siz=4"`  // Number of items
-	Level         uint8       `bin:"off=64, siz=1"`  // Level (0 for leaf nodes)
-	binstruct.End `bin:"off=65"`
-}
-
-type InternalNode struct {
-	NodeHeader
-	Body []KeyPointer
-}
-
-type KeyPointer struct {
-	Key           Key        `bin:"off=0, siz=11"`
-	BlockNumber   uint64     `bin:"off=11, siz=8"`
-	Generation    Generation `bin:"off=19, siz=8"`
-	binstruct.End `bin:"off=21"`
-}
-
-type LeafNode struct {
-	NodeHeader
-	Body []Item
-}
-
-type Item struct {
-	Key           Key    `bin:"off=0, siz=11"`
-	DataOffset    uint32 `bin:"off=11, siz=4"` // relative to the end of the header (0x65)
-	DataSize      uint32 `bin:"off=15, siz=4"`
-	binstruct.End `bin:"off=19"`
-}
-
-type DevItem struct {
-	DeviceID ObjID `bin:"off=0,    siz=8"` // device ID
-
-	NumBytes     uint64 `bin:"off=8,    siz=8"` // number of bytes
-	NumBytesUsed uint64 `bin:"off=10,   siz=8"` // number of bytes used
-
-	IOOptimalAlign uint32 `bin:"off=18,   siz=4"` // optimal I/O align
-	IOOptimalWidth uint32 `bin:"off=1c,   siz=4"` // optimal I/O width
-	IOMinSize      uint32 `bin:"off=20,   siz=4"` // minimal I/O size (sector size)
-
-	Type        uint64     `bin:"off=24,   siz=8"` // type
-	Generation  Generation `bin:"off=2c,   siz=8"` // generation
-	StartOffset uint64     `bin:"off=34,   siz=8"` // start offset
-	DevGroup    uint32     `bin:"off=3c,   siz=4"` // dev group
-	SeekSpeed   uint8      `bin:"off=40,   siz=1"` // seek speed
-	Bandwidth   uint8      `bin:"off=41,   siz=1"` // bandwidth
-
-	DevUUID UUID `bin:"off=42,   siz=10"` // device UUID
-	FSUUID  UUID `bin:"off=52,   siz=10"` // FS UUID
-
-	binstruct.End `bin:"off=62"`
-}
-
-type ChunkItem struct {
-	// Maps logical address to physical.
-	Size           uint64 `bin:"off=0,  siz=8"` // size of chunk (bytes)
-	Root           ObjID  `bin:"off=8,  siz=8"` // root referencing this chunk (2)
-	StripeLen      uint64 `bin:"off=10, siz=8"` // stripe length
-	Type           uint64 `bin:"off=18, siz=8"` // type (same as flags for block group?)
-	IOOptimalAlign uint32 `bin:"off=20, siz=4"` // optimal io alignment
-	IOOptimalWidth uint32 `bin:"off=24, siz=4"` // optimal io width
-	IoMinSize      uint32 `bin:"off=28, siz=4"` // minimal io size (sector size)
-	NumStripes     uint16 `bin:"off=2c, siz=2"` // number of stripes
-	SubStripes     uint16 `bin:"off=2e, siz=2"` // sub stripes
-	binstruct.End  `bin:"off=30"`
-	Stripes        []ChunkItemStripe `bin:"-"`
-}
-
-type ChunkItemStripe struct {
-	// Stripes follow (for each number of stripes):
-	DeviceID      ObjID  `bin:"off=0,  siz=8"`  // device ID
-	Offset        uint64 `bin:"off=8,  siz=8"`  // offset
-	DeviceUUID    UUID   `bin:"off=10, siz=10"` // device UUID
-	binstruct.End `bin:"off=20"`
-}