add vfs quota for daemon storage-opts

Signed-off-by: fanjiyun <fan.jiyun@zte.com.cn>

daemon/graphdriver/vfs/driver.go

@@ -7,11 +7,14 @@ import (
 
 	"github.com/docker/docker/daemon/graphdriver"
 	"github.com/docker/docker/daemon/graphdriver/quota"
+	"github.com/docker/docker/errdefs"
 	"github.com/docker/docker/pkg/containerfs"
 	"github.com/docker/docker/pkg/idtools"
+	"github.com/docker/docker/pkg/parsers"
 	"github.com/docker/docker/pkg/system"
 	"github.com/docker/go-units"
 	"github.com/opencontainers/selinux/go-selinux/label"
+	"github.com/pkg/errors"
 )
 
 var (
@@ -30,6 +33,11 @@ func Init(home string, options []string, uidMaps, gidMaps []idtools.IDMap) (grap
 		home:      home,
 		idMapping: idtools.NewIDMappingsFromMaps(uidMaps, gidMaps),
 	}
+
+	if err := d.parseOptions(options); err != nil {
+		return nil, err
+	}
+
 	rootIDs := d.idMapping.RootPair()
 	if err := idtools.MkdirAllAndChown(home, 0700, rootIDs); err != nil {
 		return nil, err
@@ -37,6 +45,10 @@ func Init(home string, options []string, uidMaps, gidMaps []idtools.IDMap) (grap
 
 	setupDriverQuota(d)
 
+	if size := d.getQuotaOpt(); !d.quotaSupported() && size > 0 {
+		return nil, quota.ErrQuotaNotSupported
+	}
+
 	return graphdriver.NewNaiveDiffDriver(d, uidMaps, gidMaps), nil
 }
 
@@ -69,11 +81,32 @@ func (d *Driver) Cleanup() error {
 	return nil
 }
 
+func (d *Driver) parseOptions(options []string) error {
+	for _, option := range options {
+		key, val, err := parsers.ParseKeyValueOpt(option)
+		if err != nil {
+			return errdefs.InvalidParameter(err)
+		}
+		switch key {
+		case "size":
+			size, err := units.RAMInBytes(val)
+			if err != nil {
+				return errdefs.InvalidParameter(err)
+			}
+			if err = d.setQuotaOpt(uint64(size)); err != nil {
+				return errdefs.InvalidParameter(errors.Wrap(err, "failed to set option size for vfs"))
+			}
+		default:
+			return errdefs.InvalidParameter(errors.Errorf("unknown option %s for vfs", key))
+		}
+	}
+	return nil
+}
+
 // CreateReadWrite creates a layer that is writable for use as a container
 // file system.
 func (d *Driver) CreateReadWrite(id, parent string, opts *graphdriver.CreateOpts) error {
-	var err error
-	var size int64
+	quotaSize := d.getQuotaOpt()
 
 	if opts != nil {
 		for key, val := range opts.StorageOpt {
@@ -82,16 +115,18 @@ func (d *Driver) CreateReadWrite(id, parent string, opts *graphdriver.CreateOpts
 				if !d.quotaSupported() {
 					return quota.ErrQuotaNotSupported
 				}
-				if size, err = units.RAMInBytes(val); err != nil {
-					return err
+				size, err := units.RAMInBytes(val)
+				if err != nil {
+					return errdefs.InvalidParameter(err)
 				}
+				quotaSize = uint64(size)
 			default:
-				return fmt.Errorf("Storage opt %s not supported", key)
+				return errdefs.InvalidParameter(errors.Errorf("Storage opt %s not supported", key))
 			}
 		}
 	}
 
-	return d.create(id, parent, uint64(size))
+	return d.create(id, parent, quotaSize)
 }
 
 // Create prepares the filesystem for the VFS driver and copies the directory for the given id under the parent.

daemon/graphdriver/vfs/quota_linux.go

@@ -7,6 +7,7 @@ import (
 
 type driverQuota struct {
 	quotaCtl *quota.Control
+	quotaOpt quota.Quota
 }
 
 func setupDriverQuota(driver *Driver) {
@@ -17,6 +18,15 @@ func setupDriverQuota(driver *Driver) {
 	}
 }
 
+func (d *Driver) setQuotaOpt(size uint64) error {
+	d.quotaOpt.Size = size
+	return nil
+}
+
+func (d *Driver) getQuotaOpt() uint64 {
+	return d.quotaOpt.Size
+}
+
 func (d *Driver) setupQuota(dir string, size uint64) error {
 	return d.quotaCtl.SetQuota(dir, quota.Quota{Size: size})
 }

daemon/graphdriver/vfs/quota_unsupported.go

@@ -11,6 +11,14 @@ func setupDriverQuota(driver *Driver) error {
 	return nil
 }
 
+func (d *Driver) setQuotaOpt(size uint64) error {
+	return quota.ErrQuotaNotSupported
+}
+
+func (d *Driver) getQuotaOpt() uint64 {
+	return 0
+}
+
 func (d *Driver) setupQuota(dir string, size uint64) error {
 	return quota.ErrQuotaNotSupported
 }