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moby--moby/volume/volume_propagation_linux.go

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// +build linux
package volume
import (
"strings"
)
// DefaultPropagationMode defines what propagation mode should be used by
// default if user has not specified one explicitly.
const DefaultPropagationMode string = "rprivate"
// propagation modes
var propagationModes = map[string]bool{
"private": true,
"rprivate": true,
"slave": true,
"rslave": true,
"shared": true,
"rshared": true,
}
// GetPropagation extracts and returns the mount propagation mode. If there
// are no specifications, then by default it is "private".
func GetPropagation(mode string) string {
for _, o := range strings.Split(mode, ",") {
if propagationModes[o] {
return o
}
}
return DefaultPropagationMode
}
// HasPropagation checks if there is a valid propagation mode present in
// passed string. Returns true if a valid propagatio mode specifier is
// present, false otherwise.
func HasPropagation(mode string) bool {
for _, o := range strings.Split(mode, ",") {
if propagationModes[o] {
return true
}
}
return false
}