netapp plugin: cna_init: Add some comments.

diff --git a/src/netapp.c b/src/netapp.c
index 87b88501fff3b54b7ee718e73319e3811e63b53c..36159d7cbd2ad16f9a4f814ecab3631e46d1a322 100644 (file)
--- a/src/netapp.c
+++ b/src/netapp.c
@@ -1488,29 +1488,41 @@ static int cna_init(void) { /* {{{ */
                return 1;
        }
 
+       memset (err, 0, sizeof (err));
        if (!na_startup(err, sizeof(err))) {
+               err[sizeof (err) - 1] = 0;
                ERROR("netapp plugin: Error initializing netapp API: %s", err);
                return 1;
        }
 
        for (host = global_host_config; host; host = host->next) {
-               host->srv = na_server_open(host->host, 1, 1); 
-               na_server_set_transport_type(host->srv, host->protocol, 0);
+               /* Request version 1.1 of the ONTAP API */
+               host->srv = na_server_open(host->host,
+                               /* major version = */ 1, /* minor version = */ 1); 
+               if (host->srv == NULL) {
+                       ERROR ("netapp plugin: na_server_open (%s) failed.", host->host);
+                       continue;
+               }
+
+               if (host->interval < interval_g)
+                       host->interval = interval_g;
+
+               na_server_set_transport_type(host->srv, host->protocol,
+                               /* transportarg = */ NULL);
                na_server_set_port(host->srv, host->port);
                na_server_style(host->srv, NA_STYLE_LOGIN_PASSWORD);
                na_server_adminuser(host->srv, host->username, host->password);
-               na_server_set_timeout(host->srv, 5);
+               na_server_set_timeout(host->srv, 5 /* seconds */);
+
                for (service = host->services; service; service = service->next) {
                        service->interval = host->interval * service->multiplier;
+
                        if (service->handler == collect_perf_system_data) {
                                service->query = na_elem_new("perf-object-get-instances");
                                na_child_add_string(service->query, "objectname", "system");
                        } else if (service->handler == query_volume_perf_data) {
                                service->query = na_elem_new("perf-object-get-instances");
                                na_child_add_string(service->query, "objectname", "volume");
-/*                             e = na_elem_new("instances");
-                               na_child_add_string(e, "foo", "system");
-                               na_child_add(root, e);*/
                                e = na_elem_new("counters");
                                na_child_add_string(e, "foo", "read_ops");
                                na_child_add_string(e, "foo", "write_ops");
@@ -1522,9 +1534,6 @@ static int cna_init(void) { /* {{{ */
                        } else if (service->handler == query_wafl_data) {
                                service->query = na_elem_new("perf-object-get-instances");
                                na_child_add_string(service->query, "objectname", "wafl");
-/*                             e = na_elem_new("instances");
-                               na_child_add_string(e, "foo", "system");
-                               na_child_add(root, e);*/
                                e = na_elem_new("counters");
                                na_child_add_string(e, "foo", "name_cache_hit");
                                na_child_add_string(e, "foo", "name_cache_miss");