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Merge pull request kubernetes#81794 from codenrhoden/split-host-utils2
Split HostUtil functionality into its own files
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| /* | ||
| 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 mount | ||
|
|
||
| import ( | ||
| "errors" | ||
| "os" | ||
| "sync" | ||
| ) | ||
|
|
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| // FakeHostUtil is a fake mount.HostUtils implementation for testing | ||
| type FakeHostUtil struct { | ||
| MountPoints []MountPoint | ||
| Filesystem map[string]FileType | ||
|
|
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| mutex sync.Mutex | ||
| } | ||
|
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| var _ HostUtils = &FakeHostUtil{} | ||
|
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| // DeviceOpened checks if block device referenced by pathname is in use by | ||
| // checking if is listed as a device in the in-memory mountpoint table. | ||
| func (hu *FakeHostUtil) DeviceOpened(pathname string) (bool, error) { | ||
| hu.mutex.Lock() | ||
| defer hu.mutex.Unlock() | ||
|
|
||
| for _, mp := range hu.MountPoints { | ||
| if mp.Device == pathname { | ||
| return true, nil | ||
| } | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| // PathIsDevice always returns true | ||
| func (hu *FakeHostUtil) PathIsDevice(pathname string) (bool, error) { | ||
| return true, nil | ||
| } | ||
|
|
||
| // GetDeviceNameFromMount given a mount point, find the volume id | ||
| func (hu *FakeHostUtil) GetDeviceNameFromMount(mounter Interface, mountPath, pluginMountDir string) (string, error) { | ||
| return getDeviceNameFromMount(mounter, mountPath, pluginMountDir) | ||
| } | ||
|
|
||
| // MakeRShared checks if path is shared and bind-mounts it as rshared if needed. | ||
| // No-op for testing | ||
| func (hu *FakeHostUtil) MakeRShared(path string) error { | ||
| return nil | ||
| } | ||
|
|
||
| // GetFileType checks for file/directory/socket/block/character devices. | ||
| // Defaults to Directory if otherwise unspecified. | ||
| func (hu *FakeHostUtil) GetFileType(pathname string) (FileType, error) { | ||
| if t, ok := hu.Filesystem[pathname]; ok { | ||
| return t, nil | ||
| } | ||
| return FileType("Directory"), nil | ||
| } | ||
|
|
||
| // MakeDir creates a new directory. | ||
| // No-op for testing | ||
| func (hu *FakeHostUtil) MakeDir(pathname string) error { | ||
| return nil | ||
| } | ||
|
|
||
| // MakeFile creates a new file. | ||
| // No-op for testing | ||
| func (hu *FakeHostUtil) MakeFile(pathname string) error { | ||
| return nil | ||
| } | ||
|
|
||
| // PathExists checks if pathname exists. | ||
| func (hu *FakeHostUtil) PathExists(pathname string) (bool, error) { | ||
| if _, ok := hu.Filesystem[pathname]; ok { | ||
| return true, nil | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| // EvalHostSymlinks returns the path name after evaluating symlinks. | ||
| // No-op for testing | ||
| func (hu *FakeHostUtil) EvalHostSymlinks(pathname string) (string, error) { | ||
| return pathname, nil | ||
| } | ||
|
|
||
| // GetOwner returns the integer ID for the user and group of the given path | ||
| // Not implemented for testing | ||
| func (hu *FakeHostUtil) GetOwner(pathname string) (int64, int64, error) { | ||
| return -1, -1, errors.New("GetOwner not implemented") | ||
| } | ||
|
|
||
| // GetSELinuxSupport tests if pathname is on a mount that supports SELinux. | ||
| // Not implemented for testing | ||
| func (hu *FakeHostUtil) GetSELinuxSupport(pathname string) (bool, error) { | ||
| return false, errors.New("GetSELinuxSupport not implemented") | ||
| } | ||
|
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||
| // GetMode returns permissions of pathname. | ||
| // Not implemented for testing | ||
| func (hu *FakeHostUtil) GetMode(pathname string) (os.FileMode, error) { | ||
| return 0, errors.New("not implemented") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| /* | ||
| Copyright 2014 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. | ||
| */ | ||
|
|
||
| // TODO(thockin): This whole pkg is pretty linux-centric. As soon as we have | ||
| // an alternate platform, we will need to abstract further. | ||
|
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| package mount | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "os" | ||
| ) | ||
|
|
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| // FileType enumerates the known set of possible file types. | ||
| type FileType string | ||
|
|
||
| const ( | ||
| // FileTypeBlockDev defines a constant for the block device FileType. | ||
| FileTypeBlockDev FileType = "BlockDevice" | ||
| // FileTypeCharDev defines a constant for the character device FileType. | ||
| FileTypeCharDev FileType = "CharDevice" | ||
| // FileTypeDirectory defines a constant for the directory FileType. | ||
| FileTypeDirectory FileType = "Directory" | ||
| // FileTypeFile defines a constant for the file FileType. | ||
| FileTypeFile FileType = "File" | ||
| // FileTypeSocket defines a constant for the socket FileType. | ||
| FileTypeSocket FileType = "Socket" | ||
| // FileTypeUnknown defines a constant for an unknown FileType. | ||
| FileTypeUnknown FileType = "" | ||
| ) | ||
|
|
||
| // HostUtils defines the set of methods for interacting with paths on a host. | ||
| type HostUtils interface { | ||
| // DeviceOpened determines if the device (e.g. /dev/sdc) is in use elsewhere | ||
| // on the system, i.e. still mounted. | ||
| DeviceOpened(pathname string) (bool, error) | ||
| // PathIsDevice determines if a path is a device. | ||
| PathIsDevice(pathname string) (bool, error) | ||
| // GetDeviceNameFromMount finds the device name by checking the mount path | ||
| // to get the global mount path within its plugin directory. | ||
| GetDeviceNameFromMount(mounter Interface, mountPath, pluginMountDir string) (string, error) | ||
| // MakeRShared checks that given path is on a mount with 'rshared' mount | ||
| // propagation. If not, it bind-mounts the path as rshared. | ||
| MakeRShared(path string) error | ||
| // GetFileType checks for file/directory/socket/block/character devices. | ||
| GetFileType(pathname string) (FileType, error) | ||
| // MakeFile creates an empty file. | ||
| MakeFile(pathname string) error | ||
| // MakeDir creates a new directory. | ||
| MakeDir(pathname string) error | ||
| // PathExists tests if the given path already exists | ||
| // Error is returned on any other error than "file not found". | ||
| PathExists(pathname string) (bool, error) | ||
| // EvalHostSymlinks returns the path name after evaluating symlinks. | ||
| EvalHostSymlinks(pathname string) (string, error) | ||
| // GetOwner returns the integer ID for the user and group of the given path | ||
| GetOwner(pathname string) (int64, int64, error) | ||
| // GetSELinuxSupport returns true if given path is on a mount that supports | ||
| // SELinux. | ||
| GetSELinuxSupport(pathname string) (bool, error) | ||
| // GetMode returns permissions of the path. | ||
| GetMode(pathname string) (os.FileMode, error) | ||
| } | ||
|
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| // Compile-time check to ensure all HostUtil implementations satisfy | ||
| // the HostUtils Interface. | ||
| var _ HostUtils = &hostUtil{} | ||
|
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| // getFileType checks for file/directory/socket and block/character devices. | ||
| func getFileType(pathname string) (FileType, error) { | ||
| var pathType FileType | ||
| info, err := os.Stat(pathname) | ||
| if os.IsNotExist(err) { | ||
| return pathType, fmt.Errorf("path %q does not exist", pathname) | ||
| } | ||
| // err in call to os.Stat | ||
| if err != nil { | ||
| return pathType, err | ||
| } | ||
|
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| // checks whether the mode is the target mode. | ||
| isSpecificMode := func(mode, targetMode os.FileMode) bool { | ||
| return mode&targetMode == targetMode | ||
| } | ||
|
|
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| mode := info.Mode() | ||
| if mode.IsDir() { | ||
| return FileTypeDirectory, nil | ||
| } else if mode.IsRegular() { | ||
| return FileTypeFile, nil | ||
| } else if isSpecificMode(mode, os.ModeSocket) { | ||
| return FileTypeSocket, nil | ||
| } else if isSpecificMode(mode, os.ModeDevice) { | ||
| if isSpecificMode(mode, os.ModeCharDevice) { | ||
| return FileTypeCharDev, nil | ||
| } | ||
| return FileTypeBlockDev, nil | ||
| } | ||
|
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| return pathType, fmt.Errorf("only recognise file, directory, socket, block device and character device") | ||
| } |
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