Permalink
Fetching contributors…
Cannot retrieve contributors at this time
100 lines (84 sloc) 2.49 KB
// +build linux freebsd
// Package local provides the default implementation for volumes. It
// is used to mount data volume containers and directories local to
// the host server.
package local // import "github.com/docker/docker/volume/local"
import (
"fmt"
"net"
"os"
"path/filepath"
"strings"
"syscall"
"time"
"github.com/pkg/errors"
"github.com/docker/docker/pkg/mount"
)
var (
oldVfsDir = filepath.Join("vfs", "dir")
validOpts = map[string]bool{
"type": true, // specify the filesystem type for mount, e.g. nfs
"o": true, // generic mount options
"device": true, // device to mount from
}
)
type optsConfig struct {
MountType string
MountOpts string
MountDevice string
}
func (o *optsConfig) String() string {
return fmt.Sprintf("type='%s' device='%s' o='%s'", o.MountType, o.MountDevice, o.MountOpts)
}
// scopedPath verifies that the path where the volume is located
// is under Docker's root and the valid local paths.
func (r *Root) scopedPath(realPath string) bool {
// Volumes path for Docker version >= 1.7
if strings.HasPrefix(realPath, filepath.Join(r.scope, volumesPathName)) && realPath != filepath.Join(r.scope, volumesPathName) {
return true
}
// Volumes path for Docker version < 1.7
if strings.HasPrefix(realPath, filepath.Join(r.scope, oldVfsDir)) {
return true
}
return false
}
func setOpts(v *localVolume, opts map[string]string) error {
if len(opts) == 0 {
return nil
}
if err := validateOpts(opts); err != nil {
return err
}
v.opts = &optsConfig{
MountType: opts["type"],
MountOpts: opts["o"],
MountDevice: opts["device"],
}
return nil
}
func (v *localVolume) mount() error {
if v.opts.MountDevice == "" {
return fmt.Errorf("missing device in volume options")
}
mountOpts := v.opts.MountOpts
if v.opts.MountType == "nfs" {
if addrValue := getAddress(v.opts.MountOpts); addrValue != "" && net.ParseIP(addrValue).To4() == nil {
ipAddr, err := net.ResolveIPAddr("ip", addrValue)
if err != nil {
return errors.Wrapf(err, "error resolving passed in nfs address")
}
mountOpts = strings.Replace(mountOpts, "addr="+addrValue, "addr="+ipAddr.String(), 1)
}
}
err := mount.Mount(v.opts.MountDevice, v.path, v.opts.MountType, mountOpts)
return errors.Wrap(err, "failed to mount local volume")
}
func (v *localVolume) CreatedAt() (time.Time, error) {
fileInfo, err := os.Stat(v.path)
if err != nil {
return time.Time{}, err
}
sec, nsec := fileInfo.Sys().(*syscall.Stat_t).Ctim.Unix()
return time.Unix(sec, nsec), nil
}