mount

package
v1.4.1 Latest Latest
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 Go to latest Published: Apr 27, 2023 License: MPL-2.0 Imports: 27 Imported by: 0

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Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ForceGGroupsV1 

func ForceGGroupsV1() bool

ForceGGroupsV1 returns the cgroup version to be used (only for !container mode).

func Mount 

func Mount(mountpoints *Points) (err error)

Mount mounts the device(s).

func Move 

func Move(mountpoints *Points, prefix string) (err error)

Move moves the device(s). TODO(andrewrynhard): We need to skip calling the move method on mountpoints that are a child of another mountpoint. The kernel will handle moving the child mountpoints for us.

func PrefixMountTargets 

func PrefixMountTargets(mountpoints *Points, targetPrefix string) error

PrefixMountTargets prefixes all mountpoints targets with fixed path.

func SystemPartitionMount 

func SystemPartitionMount(r runtime.Runtime, logger *log.Logger, label string, opts ...Option) (err error)

SystemPartitionMount mounts a system partition by the label.

func SystemPartitionUnmount 

func SystemPartitionUnmount(r runtime.Runtime, logger *log.Logger, label string) (err error)

SystemPartitionUnmount unmounts a system partition by the label.

func Unmount 

func Unmount(mountpoints *Points) (err error)

Unmount unmounts the device(s).

func UnmountAll 

func UnmountAll() error

UnmountAll attempts to unmount all the mounted filesystems via "self" mountinfo.

Types

type Flags 

type Flags uint

Flags is the mount flags. 

const (
	// ReadOnly is a flag for setting the mount point as readonly.
	ReadOnly Flags = 1 << iota
	// Shared is a flag for setting the mount point as shared.
	Shared
	// Resize indicates that a the partition for a given mount point should be
	// resized to the maximum allowed.
	Resize
	// Overlay indicates that a the partition for a given mount point should be
	// mounted using overlayfs.
	Overlay
	// SystemOverlay indicates that overlay directory should be created under tmpfs.
	//
	// SystemOverlay should be combined with Overlay option.
	SystemOverlay
	// ReadonlyOverlay indicates that a the partition for a given mount point should be
	// mounted using multi-layer readonly overlay from multiple partitions given as sources.
	ReadonlyOverlay
	// SkipIfMounted is a flag for skipping mount if the mountpoint is already mounted.
	SkipIfMounted
	// SkipIfNoFilesystem is a flag for skipping formatting and mounting if the mountpoint has not filesystem.
	SkipIfNoFilesystem
)

func (Flags) Check 

func (f Flags) Check(flags Flags) bool

Check checks if all provided flags are set.

func (Flags) Intersects 

func (f Flags) Intersects(flags Flags) bool

Intersects checks if at least one flag is set.

type Hook 

type Hook func(p *Point) error

Hook represents pre/post mount hook.

type Option 

type Option func(*Options)

Option is the functional option func.

func WithEncryptionConfig 

func WithEncryptionConfig(cfg config.Encryption) Option

WithEncryptionConfig partition encryption configuration.

func WithFlags 

func WithFlags(flags Flags) Option

WithFlags is a functional option to set up mount flags.

func WithLogger 

func WithLogger(logger *log.Logger) Option

WithLogger sets the logger.

func WithPostUnmountHooks 

func WithPostUnmountHooks(hooks ...Hook) Option

WithPostUnmountHooks adds functions to be called after unmounting the partition.

func WithPreMountHooks 

func WithPreMountHooks(hooks ...Hook) Option

WithPreMountHooks adds functions to be called before mounting the partition.

func WithPrefix 

func WithPrefix(o string) Option

WithPrefix is a functional option for setting the mount point prefix.

type Options 

type Options struct {
	Loopback         string
	Prefix           string
	MountFlags       Flags
	PreMountHooks    []Hook
	PostUnmountHooks []Hook
	Encryption       config.Encryption
	Logger           *log.Logger
}

Options is the functional options struct.

func NewDefaultOptions 

func NewDefaultOptions(setters ...Option) *Options

NewDefaultOptions initializes a Options struct with default values.

type Point 

type Point struct {
	*Options
	// contains filtered or unexported fields
}

Point represents a Linux mount point.

func NewMountPoint 

func NewMountPoint(source, target, fstype string, flags uintptr, data string, setters ...Option) *Point

NewMountPoint initializes and returns a Point struct.

func SystemMountPointForLabel 

func SystemMountPointForLabel(device *blockdevice.BlockDevice, label string, opts ...Option) (mountpoint *Point, err error)

SystemMountPointForLabel returns a mount point for the specified device and label.

func (*Point) Data 

func (p *Point) Data() string

Data returns the mount points data field.

func (*Point) Flags 

func (p *Point) Flags() uintptr

Flags returns the mount points flags field.

func (*Point) Fstype 

func (p *Point) Fstype() string

Fstype returns the mount points fstype field.

func (*Point) GrowFilesystem 

func (p *Point) GrowFilesystem() (err error)

GrowFilesystem grows a partition's filesystem to the maximum size allowed. NB: An XFS partition MUST be mounted, or this will fail.

func (*Point) IsMounted 

func (p *Point) IsMounted() (bool, error)

IsMounted checks whether mount point is active under /proc/mounts.

func (*Point) Mount 

func (p *Point) Mount() (err error)

Mount attempts to retry a mount on EBUSY. It will attempt a retry every 100 milliseconds over the course of 5 seconds.

func (*Point) Move 

func (p *Point) Move(prefix string) (err error)

Move moves a mountpoint to a new location with a prefix.

func (*Point) Repair 

func (p *Point) Repair() error

Repair repairs a partition's filesystem.

func (*Point) ResizePartition 

func (p *Point) ResizePartition() (resized bool, err error)

ResizePartition resizes a partition to the maximum size allowed.

func (*Point) Source 

func (p *Point) Source() string

Source returns the mount points source field.

func (*Point) Target 

func (p *Point) Target() string

Target returns the mount points target field.

func (*Point) Unmount 

func (p *Point) Unmount() (err error)

Unmount attempts to retry an unmount on EBUSY. It will attempt a retry every 100 milliseconds over the course of 5 seconds.

type PointMap 

type PointMap = map[string]*Point

PointMap represents a unique set of mount points.

type Points 

type Points struct {
	// contains filtered or unexported fields
}

Points represents an ordered set of mount points.

func BPFMountPoints 

func BPFMountPoints() (mountpoints *Points, err error)

BPFMountPoints returns the bpf mount points.

func CGroupMountPoints 

func CGroupMountPoints() (mountpoints *Points, err error)

CGroupMountPoints returns the cgroup mount points.

func NewMountPoints 

func NewMountPoints() *Points

NewMountPoints initializes and returns a Points struct.

func OverlayMountPoints 

func OverlayMountPoints() (mountpoints *Points, err error)

OverlayMountPoints returns the mountpoints required to boot the system. These mountpoints are used as overlays on top of the read only rootfs.

func PseudoMountPoints 

func PseudoMountPoints() (mountpoints *Points, err error)

PseudoMountPoints returns the mountpoints required to boot the system.

func PseudoSubMountPoints 

func PseudoSubMountPoints() (mountpoints *Points, err error)

PseudoSubMountPoints returns the mountpoints required to boot the system.

func SquashfsMountPoints 

func SquashfsMountPoints(prefix string) (mountpoints *Points, err error)

SquashfsMountPoints returns the mountpoints required to boot the system.

func SystemMountPointsForDevice 

func SystemMountPointsForDevice(devpath string, opts ...Option) (mountpoints *Points, err error)

SystemMountPointsForDevice returns the mountpoints required to boot the system. This function is called exclusively during installations ( both image creation and bare metall installs ). This is why we want to look up device by specified disk as well as why we don't want to grow any filesystems.

func (*Points) Get 

func (p *Points) Get(key string) (value *Point, ok bool)

Get gets an ordered value.

func (*Points) Iter 

func (p *Points) Iter() *PointsIterator

Iter initializes and returns a mount point iterator.

func (*Points) IterRev 

func (p *Points) IterRev() *PointsIterator

IterRev initializes and returns a mount point iterator that advances in reverse.

func (*Points) Len 

func (p *Points) Len() int

Len returns number of mount points.

func (*Points) Set 

func (p *Points) Set(key string, value *Point)

Set sets an ordered value.

type PointsIterator 

type PointsIterator struct {
	// contains filtered or unexported fields
}

PointsIterator represents an iteratable group of mount points.

func (*PointsIterator) Err 

func (i *PointsIterator) Err() error

Err returns an error.

func (*PointsIterator) Key 

func (i *PointsIterator) Key() string

Key returns the current key.

func (*PointsIterator) Next 

func (i *PointsIterator) Next() bool

Next advances the iterator to the next value.

func (*PointsIterator) Value 

func (i *PointsIterator) Value() *Point

Value returns current mount point.

type RetryFunc 

type RetryFunc func(*Point) error

RetryFunc defines the requirements for retrying a mount point operation.

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