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validate.go
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validate.go
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package container
import (
"fmt"
"os"
"path/filepath"
"github.com/docker/swarmkit/api"
)
func validateMounts(mounts []api.Mount) error {
for _, mount := range mounts {
// Target must always be absolute
if !filepath.IsAbs(mount.Target) {
return fmt.Errorf("invalid mount target, must be an absolute path: %s", mount.Target)
}
switch mount.Type {
// The checks on abs paths are required due to the container API confusing
// volume mounts as bind mounts when the source is absolute (and vice-versa)
// See #25253
// TODO: This is probably not neccessary once #22373 is merged
case api.MountTypeBind:
if !filepath.IsAbs(mount.Source) {
return fmt.Errorf("invalid bind mount source, must be an absolute path: %s", mount.Source)
}
if _, err := os.Stat(mount.Source); os.IsNotExist(err) {
return fmt.Errorf("invalid bind mount source, source path not found: %s", mount.Source)
}
case api.MountTypeVolume:
if filepath.IsAbs(mount.Source) {
return fmt.Errorf("invalid volume mount source, must not be an absolute path: %s", mount.Source)
}
case api.MountTypeTmpfs:
if mount.Source != "" {
return fmt.Errorf("invalid tmpfs source, source must be empty")
}
default:
return fmt.Errorf("invalid mount type: %s", mount.Type)
}
}
return nil
}