disk

package
v0.49.0 Latest Latest
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 Go to latest Published: Mar 21, 2024 License: Apache-2.0 Imports: 9 Imported by: 4

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Constants

View Source 
const (
	// Default sector size in bytes
	DefaultSectorSize = 512

	DefaultGrainBytes = uint64(1048576) // 1 MiB

	// UUIDs
	BIOSBootPartitionGUID = "21686148-6449-6E6F-744E-656564454649"
	BIOSBootPartitionUUID = "FAC7F1FB-3E8D-4137-A512-961DE09A5549"

	FilesystemDataGUID = "0FC63DAF-8483-4772-8E79-3D69D8477DE4"
	FilesystemDataUUID = "CB07C243-BC44-4717-853E-28852021225B"

	EFISystemPartitionGUID = "C12A7328-F81F-11D2-BA4B-00A0C93EC93B"
	EFISystemPartitionUUID = "68B2905B-DF3E-4FB3-80FA-49D1E773AA33"
	EFIFilesystemUUID      = "7B77-95E7"

	LVMPartitionGUID = "E6D6D379-F507-44C2-A23C-238F2A3DF928"
	PRePartitionGUID = "9E1A2D38-C612-4316-AA26-8B49521E5A8B"

	RootPartitionUUID = "6264D520-3FB9-423F-8AB8-7A0A8E3D3562"

	// Extended Boot Loader Partition
	XBootLDRPartitionGUID = "BC13C2FF-59E6-4262-A352-B275FD6F7172"
)
View Source 
const LVMDefaultExtentSize = 4 * common.MebiByte

Default physical extent size in bytes: logical volumes created inside the VG will be aligned to this.

Variables

This section is empty.

Functions

func NewVolIDFromRand 

func NewVolIDFromRand(r *rand.Rand) string

NewVolIDFromRand creates a random 32 bit hex string to use as a volume ID for FAT filesystems

Types

type Argon2id 

type Argon2id struct {
	Iterations  uint
	Memory      uint
	Parallelism uint
}

type Btrfs 

type Btrfs struct {
	UUID       string
	Label      string
	Mountpoint string
	Subvolumes []BtrfsSubvolume
}

func (*Btrfs) AlignUp 

func (b *Btrfs) AlignUp(size uint64) uint64

func (*Btrfs) Clone 

func (b *Btrfs) Clone() Entity

func (*Btrfs) CreateMountpoint 

func (b *Btrfs) CreateMountpoint(mountpoint string, size uint64) (Entity, error)

func (*Btrfs) GenUUID 

func (b *Btrfs) GenUUID(rng *rand.Rand)

func (*Btrfs) GetChild 

func (b *Btrfs) GetChild(n uint) Entity

func (*Btrfs) GetItemCount 

func (b *Btrfs) GetItemCount() uint

func (*Btrfs) IsContainer 

func (b *Btrfs) IsContainer() bool

type BtrfsSubvolume 

type BtrfsSubvolume struct {
	Name       string
	Size       uint64
	Mountpoint string
	GroupID    uint64

	MntOps string

	// UUID of the parent volume
	UUID string
}

func (*BtrfsSubvolume) Clone 

func (bs *BtrfsSubvolume) Clone() Entity

func (*BtrfsSubvolume) EnsureSize 

func (bs *BtrfsSubvolume) EnsureSize(s uint64) bool

func (*BtrfsSubvolume) GetFSSpec 

func (bs *BtrfsSubvolume) GetFSSpec() FSSpec

func (*BtrfsSubvolume) GetFSTabOptions 

func (bs *BtrfsSubvolume) GetFSTabOptions() FSTabOptions

func (*BtrfsSubvolume) GetFSType 

func (bs *BtrfsSubvolume) GetFSType() string

func (*BtrfsSubvolume) GetMountpoint 

func (bs *BtrfsSubvolume) GetMountpoint() string

func (*BtrfsSubvolume) GetSize 

func (bs *BtrfsSubvolume) GetSize() uint64

func (*BtrfsSubvolume) IsContainer 

func (subvol *BtrfsSubvolume) IsContainer() bool

type ClevisBind 

type ClevisBind struct {
	Pin              string
	Policy           string
	RemovePassphrase bool
}

type Container 

type Container interface {
	Entity

	// GetItemCount returns the number of actual child entities.
	GetItemCount() uint

	// GetChild returns the child entity at the given index.
	GetChild(n uint) Entity
}

Container is the interface for entities that can contain other entities. Together with the base Entity interface this allows to model a generic entity tree of theoretically arbitrary depth and width.

type Entity 

type Entity interface {
	// IsContainer indicates if the implementing type can
	// contain any other entities.
	IsContainer() bool

	// Clone returns a deep copy of the entity.
	Clone() Entity
}

Entity is the base interface for all disk-related entities.

type EntityCallback 

type EntityCallback func(e Entity, path []Entity) error

type FSSpec 

type FSSpec struct {
	UUID  string
	Label string
}

FSSpec for a filesystem (UUID and Label); the first field of fstab(5)

type FSTabOptions 

type FSTabOptions struct {
	// The fourth field of fstab(5); fs_mntops
	MntOps string
	// The fifth field of fstab(5); fs_freq
	Freq uint64
	// The sixth field of fstab(5); fs_passno
	PassNo uint64
}

type Filesystem 

type Filesystem struct {
	Type string
	// ID of the filesystem, vfat doesn't use traditional UUIDs, therefore this
	// is just a string.
	UUID       string
	Label      string
	Mountpoint string
	// The fourth field of fstab(5); fs_mntops
	FSTabOptions string
	// The fifth field of fstab(5); fs_freq
	FSTabFreq uint64
	// The sixth field of fstab(5); fs_passno
	FSTabPassNo uint64
}

Filesystem related functions

func (*Filesystem) Clone 

func (fs *Filesystem) Clone() Entity

Clone the filesystem structure

func (*Filesystem) GenUUID 

func (fs *Filesystem) GenUUID(rng *rand.Rand)

func (*Filesystem) GetFSSpec 

func (fs *Filesystem) GetFSSpec() FSSpec

func (*Filesystem) GetFSTabOptions 

func (fs *Filesystem) GetFSTabOptions() FSTabOptions

func (*Filesystem) GetFSType 

func (fs *Filesystem) GetFSType() string

func (*Filesystem) GetMountpoint 

func (fs *Filesystem) GetMountpoint() string

func (*Filesystem) IsContainer 

func (fs *Filesystem) IsContainer() bool

type LUKSContainer 

type LUKSContainer struct {
	Passphrase string
	UUID       string
	Cipher     string
	Label      string
	Subsystem  string
	SectorSize uint64

	// password-based key derivation function
	PBKDF Argon2id

	Clevis *ClevisBind

	Payload Entity
}

func (*LUKSContainer) Clone 

func (lc *LUKSContainer) Clone() Entity

func (*LUKSContainer) GenUUID 

func (lc *LUKSContainer) GenUUID(rng *rand.Rand)

func (*LUKSContainer) GetChild 

func (lc *LUKSContainer) GetChild(n uint) Entity

func (*LUKSContainer) GetItemCount 

func (lc *LUKSContainer) GetItemCount() uint

func (*LUKSContainer) IsContainer 

func (lc *LUKSContainer) IsContainer() bool

func (*LUKSContainer) MetadataSize 

func (lc *LUKSContainer) MetadataSize() uint64

type LVMLogicalVolume 

type LVMLogicalVolume struct {
	Name    string
	Size    uint64
	Payload Entity
}

func (*LVMLogicalVolume) Clone 

func (lv *LVMLogicalVolume) Clone() Entity

func (*LVMLogicalVolume) EnsureSize 

func (lv *LVMLogicalVolume) EnsureSize(s uint64) bool

func (*LVMLogicalVolume) GetChild 

func (lv *LVMLogicalVolume) GetChild(n uint) Entity

func (*LVMLogicalVolume) GetItemCount 

func (lv *LVMLogicalVolume) GetItemCount() uint

func (*LVMLogicalVolume) GetSize 

func (lv *LVMLogicalVolume) GetSize() uint64

func (*LVMLogicalVolume) IsContainer 

func (lv *LVMLogicalVolume) IsContainer() bool

type LVMVolumeGroup 

type LVMVolumeGroup struct {
	Name        string
	Description string

	LogicalVolumes []LVMLogicalVolume
}

func (*LVMVolumeGroup) AlignUp 

func (vg *LVMVolumeGroup) AlignUp(size uint64) uint64

func (*LVMVolumeGroup) Clone 

func (vg *LVMVolumeGroup) Clone() Entity

func (*LVMVolumeGroup) CreateLogicalVolume 

func (vg *LVMVolumeGroup) CreateLogicalVolume(lvName string, size uint64, payload Entity) (Entity, error)

func (*LVMVolumeGroup) CreateMountpoint 

func (vg *LVMVolumeGroup) CreateMountpoint(mountpoint string, size uint64) (Entity, error)

func (*LVMVolumeGroup) GetChild 

func (vg *LVMVolumeGroup) GetChild(n uint) Entity

func (*LVMVolumeGroup) GetItemCount 

func (vg *LVMVolumeGroup) GetItemCount() uint

func (*LVMVolumeGroup) IsContainer 

func (vg *LVMVolumeGroup) IsContainer() bool

func (*LVMVolumeGroup) MetadataSize 

func (vg *LVMVolumeGroup) MetadataSize() uint64

type Mountable 

type Mountable interface {

	// GetMountPoint returns the path of the mount point.
	GetMountpoint() string

	// GetFSType returns the file system type, e.g. 'xfs'.
	GetFSType() string

	// GetFSSpec returns the file system spec information.
	GetFSSpec() FSSpec

	// GetFSTabOptions returns options for mounting the entity.
	GetFSTabOptions() FSTabOptions
}

A Mountable entity is an entity that can be mounted.

type MountableCallback 

type MountableCallback func(mnt Mountable, path []Entity) error

type MountpointCreator 

type MountpointCreator interface {
	CreateMountpoint(mountpoint string, size uint64) (Entity, error)

	// AlignUp will align the given bytes according to the
	// requirements of the container type.
	AlignUp(size uint64) uint64
}

A MountpointCreator is a container that is able to create new volumes.

CreateMountpoint creates a new mountpoint with the given size and returns the entity that represents the new mountpoint.

type Partition 

type Partition struct {
	Start    uint64 // Start of the partition in bytes
	Size     uint64 // Size of the partition in bytes
	Type     string // Partition type, e.g. 0x83 for MBR or a UUID for gpt
	Bootable bool   // `Legacy BIOS bootable` (GPT) or `active` (DOS) flag

	// ID of the partition, dos doesn't use traditional UUIDs, therefore this
	// is just a string.
	UUID string

	// If nil, the partition is raw; It doesn't contain a payload.
	Payload Entity
}

func (*Partition) Clone 

func (p *Partition) Clone() Entity

func (*Partition) EnsureSize 

func (p *Partition) EnsureSize(s uint64) bool

Ensure the partition has at least the given size. Will do nothing if the partition is already larger. Returns if the size changed.

func (*Partition) GetChild 

func (p *Partition) GetChild(n uint) Entity

func (*Partition) GetItemCount 

func (pt *Partition) GetItemCount() uint

func (*Partition) GetSize 

func (p *Partition) GetSize() uint64

func (*Partition) IsBIOSBoot 

func (p *Partition) IsBIOSBoot() bool

func (*Partition) IsContainer 

func (p *Partition) IsContainer() bool

func (*Partition) IsPReP 

func (p *Partition) IsPReP() bool

type PartitionTable 

type PartitionTable struct {
	Size       uint64 // Size of the disk (in bytes).
	UUID       string // Unique identifier of the partition table (GPT only).
	Type       string // Partition table type, e.g. dos, gpt.
	Partitions []Partition

	SectorSize   uint64 // Sector size in bytes
	ExtraPadding uint64 // Extra space at the end of the partition table (sectors)
	StartOffset  uint64 // Starting offset of the first partition in the table (Mb)
}

func NewPartitionTable 

func NewPartitionTable(basePT *PartitionTable, mountpoints []blueprint.FilesystemCustomization, imageSize uint64, mode PartitioningMode, requiredSizes map[string]uint64, rng *rand.Rand) (*PartitionTable, error)

func (*PartitionTable) AlignUp 

func (pt *PartitionTable) AlignUp(size uint64) uint64

AlignUp will align the given bytes to next aligned grain if not already aligned

func (*PartitionTable) BytesToSectors 

func (pt *PartitionTable) BytesToSectors(size uint64) uint64

Convert the given bytes to the number of sectors.

func (*PartitionTable) Clone 

func (pt *PartitionTable) Clone() Entity

func (*PartitionTable) ContainsMountpoint 

func (pt *PartitionTable) ContainsMountpoint(mountpoint string) bool

Returns if the partition table contains a filesystem with the given mount point.

func (*PartitionTable) CreateMountpoint 

func (pt *PartitionTable) CreateMountpoint(mountpoint string, size uint64) (Entity, error)

func (*PartitionTable) EnsureDirectorySizes 

func (pt *PartitionTable) EnsureDirectorySizes(dirSizeMap map[string]uint64)

EnsureDirectorySizes takes a mapping of directory paths to sizes (in bytes) and resizes the appropriate partitions such that they are at least the size of the sum of their subdirectories plus their own sizes. The function will panic if any of the directory paths are invalid.

func (*PartitionTable) EnsureSize 

func (pt *PartitionTable) EnsureSize(s uint64) bool

func (*PartitionTable) FindMountable 

func (pt *PartitionTable) FindMountable(mountpoint string) Mountable

FindMountable returns the Mountable entity with the given mountpoint in the PartitionTable. Returns nil if no Entity has the target as a Mountpoint.

func (*PartitionTable) ForEachEntity 

func (pt *PartitionTable) ForEachEntity(cb EntityCallback) error

ForEachEntity runs the provided callback function on each entity in the PartitionTable.

func (*PartitionTable) ForEachMountable 

func (pt *PartitionTable) ForEachMountable(cb MountableCallback) error

ForEachMountable runs the provided callback function on each Mountable in the PartitionTable.

func (*PartitionTable) GenUUID 

func (pt *PartitionTable) GenUUID(rng *rand.Rand)

GenUUID generates and sets UUIDs for all Partitions in the PartitionTable if the layout is GPT.

func (*PartitionTable) GenerateUUIDs 

func (pt *PartitionTable) GenerateUUIDs(rng *rand.Rand)

Generate all needed UUIDs for all the partiton and filesystems

Will not overwrite existing UUIDs and only generate UUIDs for partitions if the layout is GPT.

func (*PartitionTable) GetBuildPackages 

func (pt *PartitionTable) GetBuildPackages() []string

GetBuildPackages returns an array of packages needed to support the features used in the PartitionTable.

func (*PartitionTable) GetChild 

func (pt *PartitionTable) GetChild(n uint) Entity

func (*PartitionTable) GetItemCount 

func (pt *PartitionTable) GetItemCount() uint

func (*PartitionTable) GetMountpointSize added in v0.39.0 

func (pt *PartitionTable) GetMountpointSize(mountpoint string) (uint64, error)

GetMountpointSize takes a mountpoint and returns the size of the entity this mountpoint belongs to.

func (*PartitionTable) GetSize 

func (pt *PartitionTable) GetSize() uint64

func (*PartitionTable) HeaderSize 

func (pt *PartitionTable) HeaderSize() uint64

func (*PartitionTable) IsContainer 

func (pt *PartitionTable) IsContainer() bool

func (*PartitionTable) SectorsToBytes 

func (pt *PartitionTable) SectorsToBytes(size uint64) uint64

Convert the given number of sectors to bytes.

type PartitioningMode added in v0.12.0 

type PartitioningMode string
const (
	// AutoLVMPartitioningMode creates a LVM layout if the filesystem
	// contains a mountpoint that's not defined in the base partition table
	// of the specified image type. In the other case, a raw layout is used.
	AutoLVMPartitioningMode PartitioningMode = "auto-lvm"

	// LVMPartitioningMode always creates an LVM layout.
	LVMPartitioningMode PartitioningMode = "lvm"

	// RawPartitioningMode always creates a raw layout.
	RawPartitioningMode PartitioningMode = "raw"

	// DefaultPartitioningMode is AutoLVMPartitioningMode and is the empty state
	DefaultPartitioningMode PartitioningMode = ""
)

type Sizeable 

type Sizeable interface {
	// EnsureSize will resize the entity to the given size in case
	// it is currently smaller. Returns if the size was changed.
	EnsureSize(size uint64) bool

	// GetSize returns the size of the entity in bytes.
	GetSize() uint64
}

Sizeable is implemented by entities that carry size information.

type UniqueEntity 

type UniqueEntity interface {
	Entity
	GenUUID(rng *rand.Rand)
}

A UniqueEntity is an entity that can be uniquely identified via a UUID.

GenUUID generates a UUID for the entity if it does not yet have one.

type VolumeContainer 

type VolumeContainer interface {

	// MetadataSize returns the size of the container's metadata (in
	// bytes), i.e. the storage space that needs to be reserved for
	// the container itself, in contrast to the data it contains.
	MetadataSize() uint64
}

VolumeContainer is a specific container that contains volume entities

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