cephfs: add missing cephfs API components: function ceph_version

Signed-off-by: Kim young jin <oct28-yjkim@gmail.com>

cephfs/cephfs.go

@@ -37,6 +37,13 @@ func (mount *MountInfo) validate() error {
 	return nil
 }
 
+// Version returns the major, minor, and patch level of the libcephfs library.
+func Version() (int, int, int) {
+	var cMajor, cMinor, cPatch C.int
+	C.ceph_version(&cMajor, &cMinor, &cPatch)
+	return int(cMajor), int(cMinor), int(cPatch)
+}
+
 // CreateMount creates a mount handle for interacting with Ceph.
 func CreateMount() (*MountInfo, error) {
 	return createMount(nil)

cephfs/cephfs_test.go

@@ -357,3 +357,10 @@ func TestReadConfigFile(t *testing.T) {
 	assert.NoError(t, err)
 	assert.Equal(t, "04862775-14d5-46e0-a015-000000000000", v)
 }
+
+func TestVersion(t *testing.T) {
+	var major, minor, patch = Version()
+	assert.False(t, major < 0 || major > 1000, "invalid major")
+	assert.False(t, minor < 0 || minor > 1000, "invalid minor")
+	assert.False(t, patch < 0 || patch > 1000, "invalid patch")
+}