dotcloud/docker

package mounts // import "github.com/docker/docker/volume/mounts"

import (
    "errors"
    "fmt"
    "path"
    "regexp"
    "strings"

    "github.com/docker/docker/api/types/mount"
)

// NewLCOWParser creates a parser with Linux Containers on Windows semantics.
func NewLCOWParser() Parser {
    return &lcowParser{
        windowsParser{
            fi: defaultFileInfoProvider{},
        },
    }
}

// rxLCOWDestination is the regex expression for the mount destination for LCOW
//
// Destination (aka container path):
//   - Variation on hostdir but can be a drive followed by colon as well
//   - If a path, must be absolute. Can include spaces
//   - Drive cannot be c: (explicitly checked in code, not RegEx)
const rxLCOWDestination = `(?P<destination>/(?:[^\\/:*?"<>\r\n]+[/]?)*)`

var (
    lcowMountDestinationRegex = regexp.MustCompile(`^` + rxLCOWDestination + `$`)
    lcowSplitRawSpec          = regexp.MustCompile(`^` + rxSource + rxLCOWDestination + rxMode + `$`)
)

var lcowValidators mountValidator = func(m *mount.Mount) error {
    if path.Clean(m.Target) == "/" {
        return ErrVolumeTargetIsRoot
    }
    if m.Type == mount.TypeNamedPipe {
        return errors.New("Linux containers on Windows do not support named pipe mounts")
    }
    if !lcowMountDestinationRegex.MatchString(strings.ToLower(m.Target)) {
        return fmt.Errorf("invalid mount path: '%s'", m.Target)
    }
    return nil
}

type lcowParser struct {
    windowsParser
}

func (p *lcowParser) ValidateMountConfig(mnt *mount.Mount) error {
    return p.validateMountConfigReg(mnt, lcowValidators)
}

func (p *lcowParser) ParseMountRaw(raw, volumeDriver string) (*MountPoint, error) {
    arr, err := p.splitRawSpec(raw, lcowSplitRawSpec)
    if err != nil {
        return nil, err
    }
    return p.parseMount(arr, raw, volumeDriver, false, lcowValidators)
}

func (p *lcowParser) ParseMountSpec(cfg mount.Mount) (*MountPoint, error) {
    return p.parseMountSpec(cfg, false, lcowValidators)
}