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|
package generate
import (
"path"
"path/filepath"
"strings"
"github.com/containers/libpod/pkg/util"
spec "github.com/opencontainers/runtime-spec/specs-go"
"github.com/sirupsen/logrus"
)
// TODO unify this in one place - maybe libpod/define
const (
// TypeBind is the type for mounting host dir
TypeBind = "bind"
// TypeVolume is the type for named volumes
TypeVolume = "volume"
// TypeTmpfs is the type for mounting tmpfs
TypeTmpfs = "tmpfs"
)
// Supersede existing mounts in the spec with new, user-specified mounts.
// TODO: Should we unmount subtree mounts? E.g., if /tmp/ is mounted by
// one mount, and we already have /tmp/a and /tmp/b, should we remove
// the /tmp/a and /tmp/b mounts in favor of the more general /tmp?
func SupercedeUserMounts(mounts []spec.Mount, configMount []spec.Mount) []spec.Mount {
if len(mounts) > 0 {
// If we have overlappings mounts, remove them from the spec in favor of
// the user-added volume mounts
destinations := make(map[string]bool)
for _, mount := range mounts {
destinations[path.Clean(mount.Destination)] = true
}
// Copy all mounts from spec to defaultMounts, except for
// - mounts overridden by a user supplied mount;
// - all mounts under /dev if a user supplied /dev is present;
mountDev := destinations["/dev"]
for _, mount := range configMount {
if _, ok := destinations[path.Clean(mount.Destination)]; !ok {
if mountDev && strings.HasPrefix(mount.Destination, "/dev/") {
// filter out everything under /dev if /dev is user-mounted
continue
}
logrus.Debugf("Adding mount %s", mount.Destination)
mounts = append(mounts, mount)
}
}
return mounts
}
return configMount
}
func InitFSMounts(mounts []spec.Mount) error {
for i, m := range mounts {
switch {
case m.Type == TypeBind:
opts, err := util.ProcessOptions(m.Options, false, m.Source)
if err != nil {
return err
}
mounts[i].Options = opts
case m.Type == TypeTmpfs && filepath.Clean(m.Destination) != "/dev":
opts, err := util.ProcessOptions(m.Options, true, "")
if err != nil {
return err
}
mounts[i].Options = opts
}
}
return nil
}
|
