[src/trunk]: src/usr.sbin/npf/npfctl npfctl(8): attempt to preload bpfjit ker...

[rmind <rmind%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e7dd32d38513
branches:  trunk
changeset: 335121:e7dd32d38513
user:      rmind <rmind%NetBSD.org@localhost>
date:      Fri Dec 26 20:44:38 2014 +0000

description:
npfctl(8): attempt to preload bpfjit kernel module and print the
warning on failure.

diffstat:

 usr.sbin/npf/npfctl/npfctl.c |  23 +++++++++++++++++++++--
 1 files changed, 21 insertions(+), 2 deletions(-)

diffs (62 lines):

diff -r 8c1882fc89f6 -r e7dd32d38513 usr.sbin/npf/npfctl/npfctl.c
--- a/usr.sbin/npf/npfctl/npfctl.c      Fri Dec 26 19:52:00 2014 +0000
+++ b/usr.sbin/npf/npfctl/npfctl.c      Fri Dec 26 20:44:38 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: npfctl.c,v 1.43 2014/08/11 23:48:01 rmind Exp $        */
+/*     $NetBSD: npfctl.c,v 1.44 2014/12/26 20:44:38 rmind Exp $        */
 
 /*-
  * Copyright (c) 2009-2014 The NetBSD Foundation, Inc.
@@ -30,11 +30,12 @@
  */
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: npfctl.c,v 1.43 2014/08/11 23:48:01 rmind Exp $");
+__RCSID("$NetBSD: npfctl.c,v 1.44 2014/12/26 20:44:38 rmind Exp $");
 
 #include <sys/ioctl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/module.h>
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -480,6 +481,22 @@
        exit(EXIT_SUCCESS);
 }
 
+static void
+npfctl_preload_bpfjit(void)
+{
+       modctl_load_t args = {
+               .ml_filename = "bpfjit",
+               .ml_flags = MODCTL_NO_PROP,
+               .ml_props = NULL,
+               .ml_propslen = 0
+       };
+
+       if (modctl(MODCTL_LOAD, &args) != 0 && errno != EEXIST) {
+               fprintf(stderr, "WARNING: bpfjit is not loaded; "
+                   "this may have severe impact on performance.");
+       }
+}
+
 static int
 npfctl_save(int fd)
 {
@@ -547,6 +564,7 @@
                fun = "ioctl(IOC_NPF_SWITCH)";
                break;
        case NPFCTL_RELOAD:
+               npfctl_preload_bpfjit();
                npfctl_config_init(false);
                npfctl_parse_file(argc < 3 ? NPF_CONF_PATH : argv[2]);
                errno = ret = npfctl_config_send(fd, NULL);
@@ -581,6 +599,7 @@
                npfctl_rule(fd, argc, argv);
                break;
        case NPFCTL_LOAD:
+               npfctl_preload_bpfjit();
                ret = npfctl_load(fd);
                fun = "npfctl_config_load";
                break;