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/*
* Copyright (c) 2022. Nydus Developers. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
package erofs
import (
"fmt"
"github.com/containerd/containerd/log"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func Mount(bootstrapPath, domainID, fscacheID, mountpoint string) error {
mount := unix.Mount
var opts string
// Nydusd must have domain_id specified and it is set to fsid if it is
// never specified.
if domainID != "" && domainID != fscacheID {
opts = fmt.Sprintf("domain_id=%s,fsid=%s", domainID, fscacheID)
} else {
opts = "fsid=" + fscacheID
}
log.L.Infof("Mount erofs to %s with options %s", mountpoint, opts)
if err := mount("erofs", mountpoint, "erofs", 0, opts); err != nil {
if errors.Is(err, unix.EINVAL) && domainID != "" {
log.L.Errorf("mount erofs with shared domain failed, " +
"If using this feature, make sure your Linux kernel version >= 6.1")
}
return errors.Wrapf(err, "mount erofs at %s", mountpoint)
}
return nil
}
func Umount(mountPoint string) error {
return unix.Unmount(mountPoint, 0)
}
func FscacheID(snapshotID string) string {
return digest.FromString(fmt.Sprintf("nydus-snapshot-%s", snapshotID)).Hex()
}
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