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rbd: mark images thick-provisioned in metadata

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When images get resized/expanded, the additional space needs to be
allocated if the image was initially thick-provisioned. By marking the
image with a "thick-provisioned" key in the metadata, future operations
can check the need.

A missing "thick-provisioned" key indicates that the image has not been
thick-provisioned.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos 2021-01-28 09:45:51 +01:00 committed by mergify[bot]
parent 74d218df8d
commit 294a0973bd
1 changed files with 41 additions and 0 deletions
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41
internal/rbd/rbd_util.go
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@ -53,6 +53,9 @@ const (
rbdTaskRemoveCmdInvalidString1 = "no valid command found"
rbdTaskRemoveCmdInvalidString2 = "Error EINVAL: invalid command"
rbdTaskRemoveCmdAccessDeniedMessage = "Error EACCES:"
// image metadata key for thick-provisioning
thickProvisionMetaKey = ".rbd.csi.ceph.com/thick-provisioned"
)
// rbdVolume represents a CSI volume and its RBD image specifics.
@ -232,6 +235,14 @@ func createImage(ctx context.Context, pOpts *rbdVolume, cr *util.Credentials) er
_ = deleteImage(ctx, pOpts, cr)
return fmt.Errorf("failed to thick provision image: %w", err)
}
err = pOpts.setThickProvisioned()
if err != nil {
// nolint:errcheck // deleteImage() will log errors in
// case it fails, no need to log them here again
_ = deleteImage(ctx, pOpts, cr)
return fmt.Errorf("failed to mark image as thick-provisioned: %w", err)
}
}
return nil
@ -1242,6 +1253,36 @@ func (rv *rbdVolume) SetMetadata(key, value string) error {
return image.SetMetadata(key, value)
}
// setThickProvisioned records in the image metadata that it has been
// thick-provisioned.
func (rv *rbdVolume) setThickProvisioned() error {
err := rv.SetMetadata(thickProvisionMetaKey, "true")
if err != nil {
return fmt.Errorf("failed to set metadata %q for %q: %w", thickProvisionMetaKey, rv.String(), err)
}
return nil
}
// isThickProvisioned checks in the image metadata if the image has been marked
// as thick-provisioned. This can be used while expanding the image, so that
// the expansion can be allocated too.
func (rv *rbdVolume) isThickProvisioned() (bool, error) {
value, err := rv.GetMetadata(thickProvisionMetaKey)
if err != nil {
if err == librbd.ErrNotFound {
return false, nil
}
return false, fmt.Errorf("failed to get metadata %q for %q: %w", thickProvisionMetaKey, rv.String(), err)
}
thick, err := strconv.ParseBool(value)
if err != nil {
return false, fmt.Errorf("failed to convert %q=%q to a boolean: %w", thickProvisionMetaKey, value, err)
}
return thick, nil
}
func (rv *rbdVolume) listSnapshots() ([]librbd.SnapInfo, error) {
image, err := rv.open()
if err != nil {