| /* |
| Copyright 2015 The Kubernetes Authors. |
| |
| Licensed under the Apache License, Version 2.0 (the "License"); |
| you may not use this file except in compliance with the License. |
| You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| package fc |
| |
| import ( |
| "os" |
| |
| "k8s.io/klog" |
| "k8s.io/kubernetes/pkg/util/mount" |
| "k8s.io/kubernetes/pkg/volume" |
| "k8s.io/kubernetes/pkg/volume/util" |
| ) |
| |
| // Abstract interface to disk operations. |
| type diskManager interface { |
| MakeGlobalPDName(disk fcDisk) string |
| MakeGlobalVDPDName(disk fcDisk) string |
| // Attaches the disk to the kubelet's host machine. |
| AttachDisk(b fcDiskMounter) (string, error) |
| // Detaches the disk from the kubelet's host machine. |
| DetachDisk(disk fcDiskUnmounter, devicePath string) error |
| // Detaches the block disk from the kubelet's host machine. |
| DetachBlockFCDisk(disk fcDiskUnmapper, mntPath, devicePath string) error |
| } |
| |
| // utility to mount a disk based filesystem |
| func diskSetUp(manager diskManager, b fcDiskMounter, volPath string, mounter mount.Interface, fsGroup *int64) error { |
| globalPDPath := manager.MakeGlobalPDName(*b.fcDisk) |
| noMnt, err := mounter.IsLikelyNotMountPoint(volPath) |
| |
| if err != nil && !os.IsNotExist(err) { |
| klog.Errorf("cannot validate mountpoint: %s", volPath) |
| return err |
| } |
| if !noMnt { |
| return nil |
| } |
| if err := os.MkdirAll(volPath, 0750); err != nil { |
| klog.Errorf("failed to mkdir:%s", volPath) |
| return err |
| } |
| // Perform a bind mount to the full path to allow duplicate mounts of the same disk. |
| options := []string{"bind"} |
| if b.readOnly { |
| options = append(options, "ro") |
| } |
| mountOptions := util.JoinMountOptions(options, b.mountOptions) |
| err = mounter.Mount(globalPDPath, volPath, "", mountOptions) |
| if err != nil { |
| klog.Errorf("Failed to bind mount: source:%s, target:%s, err:%v", globalPDPath, volPath, err) |
| noMnt, mntErr := b.mounter.IsLikelyNotMountPoint(volPath) |
| if mntErr != nil { |
| klog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr) |
| return err |
| } |
| if !noMnt { |
| if mntErr = b.mounter.Unmount(volPath); mntErr != nil { |
| klog.Errorf("Failed to unmount: %v", mntErr) |
| return err |
| } |
| noMnt, mntErr = b.mounter.IsLikelyNotMountPoint(volPath) |
| if mntErr != nil { |
| klog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr) |
| return err |
| } |
| if !noMnt { |
| // will most likely retry on next sync loop. |
| klog.Errorf("%s is still mounted, despite call to unmount(). Will try again next sync loop.", volPath) |
| return err |
| } |
| } |
| os.Remove(volPath) |
| |
| return err |
| } |
| |
| if !b.readOnly { |
| volume.SetVolumeOwnership(&b, fsGroup) |
| } |
| |
| return nil |
| } |