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rbd/go-ceph: add GetMetadata() and GetMetadata() functions

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Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos
2020-01-09 11:31:07 +01:00
committed by mergify[bot]
parent ea51b04017
commit f814bd72e5
4 changed files with 66 additions and 50 deletions
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56
internal/rbd/rbd_util.go
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@ -60,6 +60,8 @@ const (
// Encryption statuses for RbdImage
rbdImageEncrypted = "encrypted"
rbdImageRequiresEncryption = "requiresEncryption"
// image metadata key for encryption
encryptionMetaKey = ".rbd.csi.ceph.com/encrypted"
)
// rbdVolume represents a CSI volume and its RBD image specifics
@ -979,21 +981,53 @@ func resizeRBDImage(rbdVol *rbdVolume, cr *util.Credentials) error {
return nil
}
func ensureEncryptionMetadataSet(ctx context.Context, cr *util.Credentials, rbdVol *rbdVolume) error {
var vi util.CSIIdentifier
err := vi.DecomposeCSIID(rbdVol.VolID)
func (rv *rbdVolume) GetMetadata(key string) (string, error) {
ioctx, err := rv.conn.GetIoctx(rv.Pool)
if err != nil {
err = fmt.Errorf("error decoding volume ID (%s) (%s)", rbdVol.VolID, err)
return ErrInvalidVolID{err}
return "", errors.Wrapf(err, "failed to get ioctx for %q", rv.RbdImageName)
}
rbdImageName := volJournal.GetNameForUUID(rbdVol.NamePrefix, vi.ObjectUUID, false)
imageSpec := rbdVol.Pool + "/" + rbdImageName
err = util.SaveRbdImageEncryptionStatus(ctx, cr, rbdVol.Monitors, imageSpec, rbdImageRequiresEncryption)
image, err := librbd.OpenImage(ioctx, rv.RbdImageName, librbd.NoSnapshot)
if err != nil {
return fmt.Errorf("failed to save encryption status for %s: %v", imageSpec, err)
return "", errors.Wrapf(err, "could not open image %q", rv.RbdImageName)
}
defer image.Close()
return image.GetMetadata(key)
}
func (rv *rbdVolume) SetMetadata(key, value string) error {
ioctx, err := rv.conn.GetIoctx(rv.Pool)
if err != nil {
return errors.Wrapf(err, "failed to get ioctx for %q", rv.RbdImageName)
}
image, err := librbd.OpenImage(ioctx, rv.RbdImageName, librbd.NoSnapshot)
if err != nil {
return errors.Wrapf(err, "could not open image %q", rv.RbdImageName)
}
defer image.Close()
return image.SetMetadata(key, value)
}
// checkRbdImageEncrypted verifies if rbd image was encrypted when created
func (rv *rbdVolume) checkRbdImageEncrypted(ctx context.Context) (string, error) {
value, err := rv.GetMetadata(encryptionMetaKey)
if err != nil {
klog.Errorf(util.Log(ctx, "checking image %s encrypted state metadata failed: %s"), rv.RbdImageName, err)
return "", err
}
encrypted := strings.TrimSpace(value)
klog.V(4).Infof(util.Log(ctx, "image %s encrypted state metadata reports %q"), rv.RbdImageName, encrypted)
return encrypted, nil
}
func (rv *rbdVolume) ensureEncryptionMetadataSet(status string) error {
err := rv.SetMetadata(encryptionMetaKey, status)
if err != nil {
return fmt.Errorf("failed to save encryption status for %s: %v", rv.RbdImageName, err)
}
return nil