git: a6b7689718d2 - main - Remove redundant rtinit() calls from tuntap.

[Alexander V. Chernikov]

The branch main has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=a6b7689718d223e5cefc7beb6d8bb317f92ff839

commit a6b7689718d223e5cefc7beb6d8bb317f92ff839
Author:     Alexander V. Chernikov <melifaro at FreeBSD.org>
AuthorDate: 2021-01-11 23:31:37 +0000
Commit:     Alexander V. Chernikov <melifaro at FreeBSD.org>
CommitDate: 2021-01-13 10:03:15 +0000

    Remove redundant rtinit() calls from tuntap.
    
    Removed code iterates over if_addrhead and tries to remove
     routes for each ifa.
    This is exactly the thing that if_purgeaddrs() do, and
     if_purgeaddr() is already called in the end.
    
    Reviewed by:            glebius
    MFC after:              2 weeks
    Differential revision:  https://reviews.freebsd.org/D28106
---
 sys/net/if_tuntap.c | 32 +-------------------------------
 1 file changed, 1 insertion(+), 31 deletions(-)

diff --git a/sys/net/if_tuntap.c b/sys/net/if_tuntap.c
index 5789fce5407f..0c0a0dd66339 100644
--- a/sys/net/if_tuntap.c
+++ b/sys/net/if_tuntap.c
@@ -123,7 +123,7 @@ struct tuntap_softc {
 #define	TUN_OPEN	0x0001
 #define	TUN_INITED	0x0002
 #define	TUN_UNUSED1	0x0008
-#define	TUN_DSTADDR	0x0010
+#define	TUN_UNUSED2	0x0010
 #define	TUN_LMODE	0x0020
 #define	TUN_RWAIT	0x0040
 #define	TUN_ASYNC	0x0080
@@ -1160,19 +1160,8 @@ tundtor(void *data)
 
 	/* Delete all addresses and routes which reference this interface. */
 	if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
-		struct ifaddr *ifa;
-
 		ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 		TUN_UNLOCK(tp);
-		CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
-			/* deal w/IPv4 PtP destination; unlocked read */
-			if (!l2tun && ifa->ifa_addr->sa_family == AF_INET) {
-				rtinit(ifa, (int)RTM_DELETE,
-				    tp->tun_flags & TUN_DSTADDR ? RTF_HOST : 0);
-			} else {
-				rtinit(ifa, (int)RTM_DELETE, 0);
-			}
-		}
 		if_purgeaddrs(ifp);
 		TUN_LOCK(tp);
 	}
@@ -1197,10 +1186,6 @@ static void
 tuninit(struct ifnet *ifp)
 {
 	struct tuntap_softc *tp = ifp->if_softc;
-#ifdef INET
-	struct epoch_tracker et;
-	struct ifaddr *ifa;
-#endif
 
 	TUNDEBUG(ifp, "tuninit\n");
 
@@ -1209,21 +1194,6 @@ tuninit(struct ifnet *ifp)
 	if ((tp->tun_flags & TUN_L2) == 0) {
 		ifp->if_flags |= IFF_UP;
 		getmicrotime(&ifp->if_lastchange);
-#ifdef INET
-		NET_EPOCH_ENTER(et);
-		CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
-			if (ifa->ifa_addr->sa_family == AF_INET) {
-				struct sockaddr_in *si;
-
-				si = (struct sockaddr_in *)ifa->ifa_dstaddr;
-				if (si && si->sin_addr.s_addr) {
-					tp->tun_flags |= TUN_DSTADDR;
-					break;
-				}
-			}
-		}
-		NET_EPOCH_EXIT(et);
-#endif
 		TUN_UNLOCK(tp);
 	} else {
 		ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;