btrfsvol

package

v0.1.0 Latest Latest Go to latest Published: Jul 11, 2023 License: Apache-2.0, GPL-2.0, GPL-3.0-or-later, + 1 more Imports: 12 Imported by: 0

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Repository

git.lukeshu.com/btrfs-progs-ng

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Documentation ¶

Overview ¶

Package btrfsvol contains core logical-volume-management layer of btrfs.

Index ¶

Variables
type AddrDelta
- func (d AddrDelta) Format(f fmt.State, verb rune)
type BlockGroupFlags
- func (f BlockGroupFlags) Has(req BlockGroupFlags) bool
- func (f BlockGroupFlags) String() string
type DeviceID
type IntAddr
type LogicalAddr
type LogicalVolume
type Mapping
type PhysicalAddr
type QualifiedPhysicalAddr
- func (a QualifiedPhysicalAddr) Add(b AddrDelta) QualifiedPhysicalAddr
- func (a QualifiedPhysicalAddr) Compare(b QualifiedPhysicalAddr) int

Constants ¶

This section is empty.

Variables ¶

View Source

var ErrCouldNotMap = errors.New("could not map logical address")

Functions ¶

This section is empty.

Types ¶

type AddrDelta ¶

type AddrDelta int64

func (AddrDelta) Format ¶

func (d AddrDelta) Format(f fmt.State, verb rune)

type BlockGroupFlags ¶

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

	// BLOCK_GROUP_RAID_MASK is the set of bits that mean that
	// mean the logical:physical relationship is a one:many
	// relationship rather than a one:one relationship.
	//
	// Notably, this does not include BLOCK_GROUP_RAID0.
	BLOCK_GROUP_RAID_MASK = (BLOCK_GROUP_RAID1 | BLOCK_GROUP_DUP | BLOCK_GROUP_RAID10 | BLOCK_GROUP_RAID5 | BLOCK_GROUP_RAID6 | BLOCK_GROUP_RAID1C3 | BLOCK_GROUP_RAID1C4)
)

func (BlockGroupFlags) Has ¶

func (f BlockGroupFlags) Has(req BlockGroupFlags) bool

func (BlockGroupFlags) String ¶

func (f BlockGroupFlags) String() string

type DeviceID ¶

type DeviceID uint64

type IntAddr ¶

type IntAddr[T _IntAddr[T]] _IntAddr[T]

IntAddr is a type constraint that you can use to accept LogicalAddr or PhysicalAddr.

type LogicalAddr ¶

type LogicalAddr int64

func (LogicalAddr) Add ¶

func (a LogicalAddr) Add(b AddrDelta) LogicalAddr

func (LogicalAddr) Format ¶

func (a LogicalAddr) Format(f fmt.State, verb rune)

func (LogicalAddr) Sub ¶

func (a LogicalAddr) Sub(b LogicalAddr) AddrDelta

type LogicalVolume ¶

type LogicalVolume[PhysicalVolume diskio.File[PhysicalAddr]] struct {
	// contains filtered or unexported fields
}

func (*LogicalVolume[PhysicalVolume]) AddMapping ¶

func (lv *LogicalVolume[PhysicalVolume]) AddMapping(m Mapping) error

func (*LogicalVolume[PhysicalVolume]) AddPhysicalVolume ¶

func (lv *LogicalVolume[PhysicalVolume]) AddPhysicalVolume(id DeviceID, dev PhysicalVolume) error

func (*LogicalVolume[PhysicalVolume]) ClearMappings ¶

func (lv *LogicalVolume[PhysicalVolume]) ClearMappings()

func (*LogicalVolume[PhysicalVolume]) Close ¶

func (lv *LogicalVolume[PhysicalVolume]) Close() error

func (*LogicalVolume[PhysicalVolume]) CouldAddMapping ¶

func (lv *LogicalVolume[PhysicalVolume]) CouldAddMapping(m Mapping) bool

func (*LogicalVolume[PhysicalVolume]) Mappings ¶

func (lv *LogicalVolume[PhysicalVolume]) Mappings() []Mapping

func (*LogicalVolume[PhysicalVolume]) Name ¶

func (lv *LogicalVolume[PhysicalVolume]) Name() string

func (*LogicalVolume[PhysicalVolume]) PhysicalVolumes ¶

func (lv *LogicalVolume[PhysicalVolume]) PhysicalVolumes() map[DeviceID]PhysicalVolume

func (*LogicalVolume[PhysicalVolume]) ReadAt ¶

func (lv *LogicalVolume[PhysicalVolume]) ReadAt(dat []byte, laddr LogicalAddr) (int, error)

func (*LogicalVolume[PhysicalVolume]) Resolve ¶

func (lv *LogicalVolume[PhysicalVolume]) Resolve(laddr LogicalAddr) (paddrs containers.Set[QualifiedPhysicalAddr], maxlen AddrDelta)

func (*LogicalVolume[PhysicalVolume]) ResolveAny ¶

func (lv *LogicalVolume[PhysicalVolume]) ResolveAny(laddr LogicalAddr, size AddrDelta) (LogicalAddr, QualifiedPhysicalAddr)

func (*LogicalVolume[PhysicalVolume]) SetName ¶

func (lv *LogicalVolume[PhysicalVolume]) SetName(name string)

func (*LogicalVolume[PhysicalVolume]) Size ¶

func (lv *LogicalVolume[PhysicalVolume]) Size() LogicalAddr

func (*LogicalVolume[PhysicalVolume]) UnResolve ¶

func (lv *LogicalVolume[PhysicalVolume]) UnResolve(paddr QualifiedPhysicalAddr) LogicalAddr

func (*LogicalVolume[PhysicalVolume]) WriteAt ¶

func (lv *LogicalVolume[PhysicalVolume]) WriteAt(dat []byte, laddr LogicalAddr) (int, error)

type Mapping ¶

type Mapping struct {
	LAddr      LogicalAddr
	PAddr      QualifiedPhysicalAddr
	Size       AddrDelta
	SizeLocked bool                                 `json:",omitempty"`
	Flags      containers.Optional[BlockGroupFlags] `json:",omitempty"`
}

type PhysicalAddr ¶

type PhysicalAddr int64

func (PhysicalAddr) Add ¶

func (a PhysicalAddr) Add(b AddrDelta) PhysicalAddr

func (PhysicalAddr) Format ¶

func (a PhysicalAddr) Format(f fmt.State, verb rune)

func (PhysicalAddr) Sub ¶

func (a PhysicalAddr) Sub(b PhysicalAddr) AddrDelta

type QualifiedPhysicalAddr ¶

type QualifiedPhysicalAddr struct {
	Dev  DeviceID
	Addr PhysicalAddr
}

func (QualifiedPhysicalAddr) Add ¶

func (a QualifiedPhysicalAddr) Add(b AddrDelta) QualifiedPhysicalAddr

func (QualifiedPhysicalAddr) Compare ¶

func (a QualifiedPhysicalAddr) Compare(b QualifiedPhysicalAddr) int

Source Files ¶

View all Source files

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