mount

package
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 Go to latest Published: Feb 9, 2021 License: Apache-2.0 Imports: 12 Imported by: 0

Documentation

Overview

Package mount defines an interface to mounting filesystems.

Index

Constants

View Source 
const (
	// FakeActionMount is the string for specifying mount as FakeAction.Action
	FakeActionMount = "mount"
	// FakeActionUnmount is the string for specifying unmount as FakeAction.Action
	FakeActionUnmount = "unmount"
)

Variables

This section is empty.

Functions

func AddSystemdScope 

func AddSystemdScope(systemdRunPath, mountName, command string, args []string) (string, []string)

AddSystemdScope adds "system-run --scope" to given command line implementation is shared with NsEnterMounter

func CleanupMountPoint 

func CleanupMountPoint(mountPath string, mounter Interface, extensiveMountPointCheck bool) error

CleanupMountPoint unmounts the given path and deletes the remaining directory if successful. If extensiveMountPointCheck is true IsNotMountPoint will be called instead of IsLikelyNotMountPoint. IsNotMountPoint is more expensive but properly handles bind mounts within the same fs.

func GetDeviceNameFromMount 

func GetDeviceNameFromMount(mounter Interface, mountPath string) (string, int, error)

GetDeviceNameFromMount given a mnt point, find the device from /proc/mounts returns the device name, reference count, and error code.

func IsCorruptedMnt 

func IsCorruptedMnt(err error) bool

IsCorruptedMnt return true if err is about corrupted mount point

func IsNotMountPoint 

func IsNotMountPoint(mounter Interface, file string) (bool, error)

IsNotMountPoint determines if a directory is a mountpoint. It should return ErrNotExist when the directory does not exist. IsNotMountPoint is more expensive than IsLikelyNotMountPoint. IsNotMountPoint detects bind mounts in linux. IsNotMountPoint enumerates all the mountpoints using List() and the list of mountpoints may be large, then it uses isMountPointMatch to evaluate whether the directory is a mountpoint.

func MakeBindOpts 

func MakeBindOpts(options []string) (bool, []string, []string)

MakeBindOpts detects whether a bind mount is being requested and makes the remount options to use in case of bind mount, due to the fact that bind mount doesn't respect mount options. The list equals: 

options - 'bind' + 'remount' (no duplicate)

func MakeMountArgs 

func MakeMountArgs(source, target, fstype string, options []string) []string

MakeMountArgs makes the arguments to the mount(8) command. Implementation is shared with NsEnterMounter

func PathExists 

func PathExists(path string) (bool, error)

PathExists returns true if the specified path exists. TODO: clean this up to use pkg/util/file/FileExists

func PathWithinBase 

func PathWithinBase(fullPath, basePath string) bool

PathWithinBase checks if give path is within given base directory.

func SearchMountPoints 

func SearchMountPoints(hostSource, mountInfoPath string) ([]string, error)

SearchMountPoints finds all mount references to the source, returns a list of mountpoints. The source can be a mount point or a normal directory (bind mount). We didn't support device because there is no use case by now. Some filesystems may share a source name, e.g. tmpfs. And for bind mounting, it's possible to mount a non-root path of a filesystem, so we need to use root path and major:minor to represent mount source uniquely. This implementation is shared between Linux and NsEnterMounter

func StartsWithBackstep 

func StartsWithBackstep(rel string) bool

StartsWithBackstep checks if the given path starts with a backstep segment.

Types

type FakeAction 

type FakeAction struct {
	Action string // "mount" or "unmount"
	Target string // applies to both mount and unmount actions
	Source string // applies only to "mount" actions
	FSType string // applies only to "mount" actions
}

FakeAction objects are logged every time a fake mount or unmount is called.