cephfs/admin: Add Subvolume{Group} pinning API

Signed-off-by: Anoop C S <anoopcs@cryptolab.net>

cephfs/admin/pin.go

@@ -0,0 +1,46 @@
+//go:build !nautilus && ceph_preview
+// +build !nautilus,ceph_preview
+
+package admin
+
+// PinSubVolume pins subvolume to ranks according to policies. A valid pin
+// setting value depends on the type of pin as described in the docs from
+// https://docs.ceph.com/en/latest/cephfs/multimds/#cephfs-pinning and
+// https://docs.ceph.com/en/latest/cephfs/multimds/#setting-subtree-partitioning-policies
+//
+// Similar To:
+//
+//	ceph fs subvolume pin <vol_name> <sub_name> <pin_type> <pin_setting>
+func (fsa *FSAdmin) PinSubVolume(volume, subvolume, pintype, pinsetting string) (string, error) {
+	m := map[string]string{
+		"prefix":      "fs subvolume pin",
+		"format":      "json",
+		"vol_name":    volume,
+		"sub_name":    subvolume,
+		"pin_type":    pintype,
+		"pin_setting": pinsetting,
+	}
+
+	return parsePathResponse(fsa.marshalMgrCommand(m))
+}
+
+// PinSubVolumeGroup pins subvolume to ranks according to policies. A valid pin
+// setting value depends on the type of pin as described in the docs from
+// https://docs.ceph.com/en/latest/cephfs/multimds/#cephfs-pinning and
+// https://docs.ceph.com/en/latest/cephfs/multimds/#setting-subtree-partitioning-policies
+//
+// Similar To:
+//
+//	ceph fs subvolumegroup pin <vol_name> <group_name> <pin_type> <pin_setting>
+func (fsa *FSAdmin) PinSubVolumeGroup(volume, group, pintype, pinsetting string) (string, error) {
+	m := map[string]string{
+		"prefix":      "fs subvolumegroup pin",
+		"format":      "json",
+		"vol_name":    volume,
+		"group_name":  group,
+		"pin_type":    pintype,
+		"pin_setting": pinsetting,
+	}
+
+	return parsePathResponse(fsa.marshalMgrCommand(m))
+}