Date: Mon, 16 Mar 2009 03:11:02 +0000 (UTC) From: Sean Farley <scf@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r189866 - head/sys/net Message-ID: <200903160311.n2G3B2wn047002@svn.freebsd.org>
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Author: scf Date: Mon Mar 16 03:11:02 2009 New Revision: 189866 URL: http://svn.freebsd.org/changeset/base/189866 Log: Add the SIOCSIFMTU ioctl handling directly to tap(4) permitting it to have its MTU set higher than 1500 (ETHERMTU). Its new limit is now 65535 as enforced by ifhwioctl() in if.c This allows a tap(4) device to be added to a bridge, which requires all interface members to have the same MTU, with an interface configured for jumbo frames. QEMU may now connect to a network via tap(4) without requiring the real interface to have its MTU set to 1500 or lower. Reviewed by: rpaulo, bms MFC after: 1 week Modified: head/sys/net/if_tap.c Modified: head/sys/net/if_tap.c ============================================================================== --- head/sys/net/if_tap.c Sun Mar 15 23:52:13 2009 (r189865) +++ head/sys/net/if_tap.c Mon Mar 16 03:11:02 2009 (r189866) @@ -600,6 +600,7 @@ static int tapifioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct tap_softc *tp = ifp->if_softc; + struct ifreq *ifr = (struct ifreq *)data; struct ifstat *ifs = NULL; int s, dummy; @@ -609,6 +610,12 @@ tapifioctl(struct ifnet *ifp, u_long cmd case SIOCDELMULTI: break; + case SIOCSIFMTU: + s = splimp(); + ifp->if_mtu = ifr->ifr_mtu; + splx(s); + break; + case SIOCGIFSTATUS: s = splimp(); ifs = (struct ifstat *)data;
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