[src/trunk]: src/sys/net/lagg Set a port interface of lagg(4) in promiscuous ...

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

details:   https://anonhg.NetBSD.org/src/rev/a1abce6345e9
branches:  trunk
changeset: 1024193:a1abce6345e9
user:      yamaguchi <yamaguchi%NetBSD.org@localhost>
date:      Tue Oct 12 08:30:58 2021 +0000

description:
Set a port interface of lagg(4) in promiscuous mode
when the lagg(4) is in promiscuous mode.

diffstat:

 sys/net/lagg/if_lagg.c      |  38 +++++++++++++++++++++++++++++++-------
 sys/net/lagg/if_laggproto.h |   3 ++-
 2 files changed, 33 insertions(+), 8 deletions(-)

diffs (103 lines):

diff -r 83bae9f637c8 -r a1abce6345e9 sys/net/lagg/if_lagg.c
--- a/sys/net/lagg/if_lagg.c    Tue Oct 12 08:26:47 2021 +0000
+++ b/sys/net/lagg/if_lagg.c    Tue Oct 12 08:30:58 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_lagg.c,v 1.12 2021/10/12 08:26:47 yamaguchi Exp $   */
+/*     $NetBSD: if_lagg.c,v 1.13 2021/10/12 08:30:58 yamaguchi Exp $   */
 
 /*
  * Copyright (c) 2005, 2006 Reyk Floeter <reyk%openbsd.org@localhost>
@@ -20,7 +20,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_lagg.c,v 1.12 2021/10/12 08:26:47 yamaguchi Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_lagg.c,v 1.13 2021/10/12 08:30:58 yamaguchi Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -180,6 +180,7 @@
 static int     lagg_port_output(struct ifnet *, struct mbuf *,
                    const struct sockaddr *, const struct rtentry *);
 static int     lagg_config_promisc(struct lagg_softc *, struct lagg_port *);
+static void    lagg_unconfig_promisc(struct lagg_softc *, struct lagg_port *);
 static struct lagg_variant *
                lagg_variant_getref(struct lagg_softc *, struct psref *);
 static void    lagg_variant_putref(struct lagg_variant *, struct psref *);
@@ -2287,6 +2288,7 @@
                        goto remove_port;
        }
 
+       lagg_config_promisc(sc, lp);
        lagg_proto_startport(sc, lp);
        lagg_capabilities_update(sc);
 
@@ -2390,6 +2392,7 @@
        }
 
        if (is_ifdetach == false) {
+               lagg_unconfig_promisc(sc, lp);
                lagg_setifcaps(lp, lp->lp_ifcapenable);
                if (lp->lp_iftype == IFT_ETHER)
                        lagg_setethcaps(lp, lp->lp_eccapenable);
@@ -2543,17 +2546,38 @@
 lagg_config_promisc(struct lagg_softc *sc, struct lagg_port *lp)
 {
        struct ifnet *ifp;
+       uint64_t chg_flags;
        int error;
-       int status;
-
+
+       error = 0;
        ifp = &sc->sc_if;
-       status = ISSET(ifp->if_flags, IFF_PROMISC) ? 1 : 0;
-
-       error = ifpromisc(lp->lp_ifp, status);
+       chg_flags = ifp->if_flags ^ lp->lp_ifflags;
+
+       if (ISSET(chg_flags, IFF_PROMISC)) {
+               error = ifpromisc(lp->lp_ifp,
+                   ISSET(ifp->if_flags, IFF_PROMISC) ? 1 : 0);
+               if (error == 0) {
+                       lp->lp_ifflags ^= IFF_PROMISC;
+               }
+       }
 
        return error;
 }
 
+static void
+lagg_unconfig_promisc(struct lagg_softc *sc, struct lagg_port *lp)
+{
+       int error;
+
+       if (ISSET(lp->lp_ifflags, IFF_PROMISC)) {
+               error = ifpromisc(lp->lp_ifp, 0);
+               if (error != 0) {
+                       lagg_log(sc, LOG_DEBUG,
+                           "couldn't unset promiscuous mode");
+               }
+       }
+}
+
 static int
 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, void *data)
 {
diff -r 83bae9f637c8 -r a1abce6345e9 sys/net/lagg/if_laggproto.h
--- a/sys/net/lagg/if_laggproto.h       Tue Oct 12 08:26:47 2021 +0000
+++ b/sys/net/lagg/if_laggproto.h       Tue Oct 12 08:30:58 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_laggproto.h,v 1.7 2021/10/12 08:26:47 yamaguchi Exp $       */
+/*     $NetBSD: if_laggproto.h,v 1.8 2021/10/12 08:30:58 yamaguchi Exp $       */
 
 /*
  * Copyright (c) 2021 Internet Initiative Japan Inc.
@@ -76,6 +76,7 @@
 
        u_char                   lp_iftype;
        uint8_t                  lp_lladdr[ETHER_ADDR_LEN];
+       unsigned short           lp_ifflags;
        int                      lp_eccapenable;
        uint64_t                 lp_ifcapenable;
        uint64_t                 lp_mtu;