Add stats counters for tracking the number of vcls loaded.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2913 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_vcl.c

@@ -172,6 +172,8 @@ VCL_Load(const char *fn, const char *name, struct cli *cli)
 	UNLOCK(&vcl_mtx);
 	cli_out(cli, "Loaded \"%s\" as \"%s\"\n", fn , name);
 	vcl->conf->init_func(cli);
+	VSL_stats->n_vcl++;
+	VSL_stats->n_vcl_avail++;
 	return (0);
 }
 
@@ -193,6 +195,8 @@ VCL_Nuke(struct vcls *vcl)
 	free(vcl->name);
 	(void)dlclose(vcl->dlh);
 	FREE_OBJ(vcl);
+	VSL_stats->n_vcl--;
+	VSL_stats->n_vcl_discard--;
 }
 
 /*--------------------------------------------------------------------*/
@@ -266,6 +270,8 @@ ccf_config_discard(struct cli *cli, const char * const *av, void *priv)
 		cli_out(cli, "VCL %s is the active VCL", av[2]);
 		return;
 	}
+	VSL_stats->n_vcl_discard++;
+	VSL_stats->n_vcl_avail--;
 	vcl->conf->discard = 1;
 	UNLOCK(&vcl_mtx);
 	if (vcl->conf->busy == 0)

include/stat_field.h

@@ -105,3 +105,7 @@ MAC_STAT(sma_balloc,		uint64_t, 'i', "SMA bytes allocated")
 MAC_STAT(sma_bfree,		uint64_t, 'i', "SMA bytes free")
 
 MAC_STAT(backend_req,		uint64_t, 'a', "Backend requests made")
+
+MAC_STAT(n_vcl,			uint64_t, 'a', "N vcl total")
+MAC_STAT(n_vcl_avail,		uint64_t, 'a', "N vcl available")
+MAC_STAT(n_vcl_discard,		uint64_t, 'a', "N vcl discarded")