netapp plugin: cna_handle_volume_snap_usage: Explain what's going on in a comment.

diff --git a/src/netapp.c b/src/netapp.c
index f47b0366a13aecdba3d5d2495f58cc4fc2ac4cc1..21ddfd4de210f90f7726e4fe6733ab81fc1e4f33 100644 (file)
--- a/src/netapp.c
+++ b/src/netapp.c
@@ -1439,15 +1439,17 @@ static void cna_handle_volume_snap_usage(const host_config_t *host, data_volume_
                        elem_snap = na_iterator_next (&iter_snap))
        {
                value = na_child_get_uint64(elem_snap, "cumulative-total", 0);
+               /* "cumulative-total" is the total size of the oldest snapshot plus all
+                * newer ones in blocks (1KB). We therefore are looking for the highest
+                * number of all snapshots - that's the size required for the snapshots. */
                if (value > snap_used)
                        snap_used = value;
        }
        na_elem_free (data);
-       /* snap_used is the total size of the oldest snapshot plus all
-        * newer ones in blocks (1KB). */
+       /* snap_used is in 1024 byte blocks */
        v->snap_used = snap_used * 1024;
        v->flags |= HAVE_VOLUME_USAGE_SNAP_USED;
-}
+} /* }}} void cna_handle_volume_snap_usage */
 
 static int cna_handle_volume_usage_data (const host_config_t *host, /* {{{ */
                cfg_volume_usage_t *cfg_volume, na_elem_t *data)