func ProbeExistingVolume(v *pod.UserVolume, sharedDir string) (*hypervisor.VolumeInfo, error) {
if v == nil || v.Source == "" { //do not create volume in this function, it depends on storage driver.
return nil, fmt.Errorf("can not generate volume info from %v", v)
}
var err error = nil
vol := &hypervisor.VolumeInfo{
Name: v.Name,
}
if v.Driver == "vfs" {
vol.Fstype = "dir"
vol.Filepath, err = storage.MountVFSVolume(v.Source, sharedDir)
if err != nil {
return nil, err
}
glog.V(1).Infof("dir %s is bound to %s", v.Source, vol.Filepath)
} else {
vol.Fstype, err = dm.ProbeFsType(v.Source)
if err != nil {
vol.Fstype = DEFAULT_VOL_FS //FIXME: for qcow2, the ProbeFsType doesn't work, should be fix later
}
vol.Format = v.Driver
vol.Filepath = v.Source
}
return vol, nil
}
func (p *Pod) PrepareVolume(daemon *Daemon, sd Storage) (err error) {
err = nil
p.volumes = []*hypervisor.VolumeInfo{}
var (
sharedDir = path.Join(hypervisor.BaseDir, p.vm.Id, hypervisor.ShareDirTag)
)
for _, v := range p.spec.Volumes {
var vol *hypervisor.VolumeInfo
if v.Source == "" {
vol, err = sd.CreateVolume(daemon, p.id, v.Name)
if err != nil {
return
}
v.Source = vol.Filepath
if sd.Type() != "devicemapper" {
v.Driver = "vfs"
vol.Filepath, err = storage.MountVFSVolume(v.Source, sharedDir)
if err != nil {
return
}
glog.V(1).Infof("dir %s is bound to %s", v.Source, vol.Filepath)
} else { // type other than doesn't need to be mounted
v.Driver = "raw"
}
} else {
vol, err = ProbeExistingVolume(&v, sharedDir)
if err != nil {
return
}
}
p.volumes = append(p.volumes, vol)
}
return nil
}