mirror of https://github.com/k3s-io/k3s
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// TODO(thockin): This whole pkg is pretty linux-centric. As soon as we have
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// an alternate platform, we will need to abstract further.
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package mount
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// Each supported platform must define the following flags:
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// - FlagBind: specifies a bind mount
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// - FlagReadOnly: the mount will be read-only
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type Interface interface {
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// Mount wraps syscall.Mount().
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Mount(source string, target string, fstype string, flags uintptr, data string) error
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// Umount wraps syscall.Mount().
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Unmount(target string, flags int) error
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// List returns a list of all mounted filesystems. This can be large.
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// On some platforms, reading mounts is not guaranteed consistent (i.e.
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// it could change between chunked reads). This is guaranteed to be
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// consistent.
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List() ([]MountPoint, error)
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// IsMountPoint determines if a directory is a mountpoint.
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IsMountPoint(file string) (bool, error)
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}
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// This represents a single line in /proc/mounts or /etc/fstab.
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type MountPoint struct {
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Device string
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Path string
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Type string
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Opts []string
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Freq int
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Pass int
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}
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// New returns a mount.Interface for the current system.
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func New() Interface {
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return &Mounter{}
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}
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// GetMountRefs finds all other references to the device referenced
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// by mountPath; returns a list of paths.
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func GetMountRefs(mounter Interface, mountPath string) ([]string, error) {
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mps, err := mounter.List()
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if err != nil {
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return nil, err
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}
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// Find the device name.
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deviceName := ""
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for i := range mps {
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if mps[i].Path == mountPath {
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deviceName = mps[i].Device
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break
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}
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}
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// Find all references to the device.
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var refs []string
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for i := range mps {
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if mps[i].Device == deviceName && mps[i].Path != mountPath {
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refs = append(refs, mps[i].Path)
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}
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}
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return refs, nil
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}
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