rebuildmappings

Documentation

Overview

Package rebuildmappings is the guts of the `btrfs-rec inspect rebuild-mappings` command, which rebuilds broken chunk/dev-extent/blockgroup trees.

Index

• func RebuildMappings(ctx context.Context, fs *btrfs.FS, scanResults ScanDevicesResult) error
• type FoundBlockGroup
• type FoundChunk
• type FoundDevExtent
• type FoundExtentCSum
  • func (a FoundExtentCSum) Compare(b FoundExtentCSum) int
• type ScanDevicesResult
  • func ScanDevices(ctx context.Context, fs *btrfs.FS) (ScanDevicesResult, error)
• type ScanOneDeviceResult
  • func ScanOneDevice(ctx context.Context, dev *btrfs.Device) (ScanOneDeviceResult, error)

Functions

func RebuildMappings

func RebuildMappings(ctx context.Context, fs *btrfs.FS, scanResults ScanDevicesResult) error

Types

type FoundBlockGroup

type FoundBlockGroup struct {
	Key btrfsprim.Key
	BG  btrfsitem.BlockGroup
}

type FoundChunk

type FoundChunk = btrfstree.SysChunk

type FoundDevExtent

type FoundDevExtent struct {
	Key    btrfsprim.Key
	DevExt btrfsitem.DevExtent
}

type FoundExtentCSum

type FoundExtentCSum struct {
	Generation btrfsprim.Generation
	Sums       btrfsitem.ExtentCSum
}

func (FoundExtentCSum) Compare

func (a FoundExtentCSum) Compare(b FoundExtentCSum) int

Compare implements containers.Ordered.

type ScanDevicesResult

type ScanDevicesResult = map[btrfsvol.DeviceID]ScanOneDeviceResult

func ScanDevices

func ScanDevices(ctx context.Context, fs *btrfs.FS) (ScanDevicesResult, error)

type ScanOneDeviceResult

type ScanOneDeviceResult struct {
	Checksums        btrfssum.SumRun[btrfsvol.PhysicalAddr]
	FoundNodes       map[btrfsvol.LogicalAddr][]btrfsvol.PhysicalAddr
	FoundChunks      []FoundChunk
	FoundBlockGroups []FoundBlockGroup
	FoundDevExtents  []FoundDevExtent
	FoundExtentCSums []FoundExtentCSum
}

func ScanOneDevice

func ScanOneDevice(ctx context.Context, dev *btrfs.Device) (ScanOneDeviceResult, error)

ScanOneDevice mostly mimics btrfs-progs cmds/rescue-chunk-recover.c:scan_one_device().