mirror of https://github.com/docker/cli.git
57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
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// +build go1.13
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package mount
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import (
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"fmt"
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"sort"
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"github.com/moby/sys/mountinfo"
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)
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// Mount will mount filesystem according to the specified configuration.
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// Options must be specified like the mount or fstab unix commands:
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// "opt1=val1,opt2=val2". See flags.go for supported option flags.
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func Mount(device, target, mType, options string) error {
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flag, data := parseOptions(options)
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return mount(device, target, mType, uintptr(flag), data)
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}
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// Unmount lazily unmounts a filesystem on supported platforms, otherwise
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// does a normal unmount.
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func Unmount(target string) error {
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return unmount(target, mntDetach)
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}
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// RecursiveUnmount unmounts the target and all mounts underneath, starting with
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// the deepsest mount first.
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func RecursiveUnmount(target string) error {
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mounts, err := mountinfo.GetMounts(mountinfo.PrefixFilter(target))
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if err != nil {
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return err
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}
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// Make the deepest mount be first
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sort.Slice(mounts, func(i, j int) bool {
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return len(mounts[i].Mountpoint) > len(mounts[j].Mountpoint)
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})
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var suberr error
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for i, m := range mounts {
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err = unmount(m.Mountpoint, mntDetach)
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if err != nil {
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if i == len(mounts)-1 { // last mount
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return fmt.Errorf("%w (possible cause: %s)", err, suberr)
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}
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// This is a submount, we can ignore the error for now,
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// the final unmount will fail if this is a real problem.
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// With that in mind, the _first_ failed unmount error
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// might be the real error cause, so let's keep it.
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if suberr == nil {
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suberr = err
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}
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}
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}
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return nil
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}
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