github.com/lazyboychen7/engine@v17.12.1-ce-rc2+incompatible/daemon/graphdriver/plugin.go (about)

     1  package graphdriver
     2  
     3  import (
     4  	"fmt"
     5  	"path/filepath"
     6  
     7  	"github.com/docker/docker/pkg/plugingetter"
     8  	"github.com/docker/docker/plugin/v2"
     9  )
    10  
    11  func lookupPlugin(name string, pg plugingetter.PluginGetter, config Options) (Driver, error) {
    12  	if !config.ExperimentalEnabled {
    13  		return nil, fmt.Errorf("graphdriver plugins are only supported with experimental mode")
    14  	}
    15  	pl, err := pg.Get(name, "GraphDriver", plugingetter.Acquire)
    16  	if err != nil {
    17  		return nil, fmt.Errorf("Error looking up graphdriver plugin %s: %v", name, err)
    18  	}
    19  	return newPluginDriver(name, pl, config)
    20  }
    21  
    22  func newPluginDriver(name string, pl plugingetter.CompatPlugin, config Options) (Driver, error) {
    23  	home := config.Root
    24  	if !pl.IsV1() {
    25  		if p, ok := pl.(*v2.Plugin); ok {
    26  			if p.PropagatedMount != "" {
    27  				home = p.PluginObj.Config.PropagatedMount
    28  			}
    29  		}
    30  	}
    31  	proxy := &graphDriverProxy{name, pl, Capabilities{}}
    32  	return proxy, proxy.Init(filepath.Join(home, name), config.DriverOptions, config.UIDMaps, config.GIDMaps)
    33  }