Count backend requests.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1729 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_fetch.c

@@ -286,6 +286,9 @@ Fetch(struct sess *sp)
 		return (1);
 	}
 
+	/* XXX is this the right place? */
+	VSL_stats->backend_req++;
+
 	CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
 	CHECK_OBJ_NOTNULL(sp->wrk, WORKER_MAGIC);
 	CHECK_OBJ_NOTNULL(sp->obj, OBJECT_MAGIC);

include/stat_field.h

@@ -89,3 +89,5 @@ MAC_STAT(sm_nreq,		uint64_t, 'a', "allocator requests")
 MAC_STAT(sm_nobj,		uint64_t, 'i', "outstanding allocations")
 MAC_STAT(sm_balloc,		uint64_t, 'i', "bytes allocated")
 MAC_STAT(sm_bfree,		uint64_t, 'i', "bytes free")
+
+MAC_STAT(backend_req,		uint64_t, 'a', "Backend requests made")