Date: Fri, 30 Sep 2016 06:21:00 +0000 (UTC) From: Sepherosa Ziehau <sephe@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r306482 - head/sys/dev/hyperv/netvsc Message-ID: <201609300621.u8U6L00o094475@repo.freebsd.org>
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Author: sephe Date: Fri Sep 30 06:21:00 2016 New Revision: 306482 URL: https://svnweb.freebsd.org/changeset/base/306482 Log: hyperv/hn: If synthetic parts are detached, don't touch them. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D8065 Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.h head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Modified: head/sys/dev/hyperv/netvsc/hv_net_vsc.h ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Sep 30 06:08:21 2016 (r306481) +++ head/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Sep 30 06:21:00 2016 (r306482) @@ -252,6 +252,7 @@ struct hn_softc { #define HN_FLAG_CHIM_CONNECTED 0x0002 #define HN_FLAG_HAS_RSSKEY 0x0004 #define HN_FLAG_HAS_RSSIND 0x0008 +#define HN_FLAG_SYNTH_ATTACHED 0x0010 #define HN_CAP_VLAN 0x0001 #define HN_CAP_MTU 0x0002 Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Sep 30 06:08:21 2016 (r306481) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Sep 30 06:21:00 2016 (r306482) @@ -405,6 +405,9 @@ hn_rss_reconfig(struct hn_softc *sc) HN_LOCK_ASSERT(sc); + if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) + return (ENXIO); + /* * Disable RSS first. * @@ -1618,6 +1621,11 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, HN_LOCK(sc); + if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) { + HN_UNLOCK(sc); + break; + } + if ((sc->hn_caps & HN_CAP_MTU) == 0) { /* Can't change MTU */ HN_UNLOCK(sc); @@ -1671,6 +1679,11 @@ hn_ioctl(struct ifnet *ifp, u_long cmd, case SIOCSIFFLAGS: HN_LOCK(sc); + if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) { + HN_UNLOCK(sc); + break; + } + if (ifp->if_flags & IFF_UP) { /* * If only the state of the PROMISC flag changed, @@ -1782,6 +1795,9 @@ hn_stop(struct hn_softc *sc) HN_LOCK_ASSERT(sc); + KASSERT(sc->hn_flags & HN_FLAG_SYNTH_ATTACHED, + ("synthetic parts were not attached")); + /* Clear RUNNING bit _before_ hn_suspend() */ atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_RUNNING); hn_suspend(sc); @@ -1858,6 +1874,9 @@ hn_init_locked(struct hn_softc *sc) HN_LOCK_ASSERT(sc); + if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) + return; + if (ifp->if_drv_flags & IFF_DRV_RUNNING) return; @@ -3377,6 +3396,9 @@ hn_synth_attach(struct hn_softc *sc, int int error, nsubch, nchan, i; uint32_t old_caps; + KASSERT((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0, + ("synthetic parts were attached")); + /* Save capabilities for later verification. */ old_caps = sc->hn_caps; sc->hn_caps = 0; @@ -3489,6 +3511,8 @@ back: error = hn_attach_subchans(sc); if (error) return (error); + + sc->hn_flags |= HN_FLAG_SYNTH_ATTACHED; return (0); } @@ -3502,6 +3526,9 @@ hn_synth_detach(struct hn_softc *sc) { HN_LOCK_ASSERT(sc); + KASSERT(sc->hn_flags & HN_FLAG_SYNTH_ATTACHED, + ("synthetic parts were not attached")); + /* Detach the RNDIS first. */ hn_rndis_detach(sc); @@ -3510,6 +3537,8 @@ hn_synth_detach(struct hn_softc *sc) /* Detach all of the channels. */ hn_detach_allchans(sc); + + sc->hn_flags &= ~HN_FLAG_SYNTH_ATTACHED; } static void
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