Author: sephe
Date: Fri Oct 14 04:53:52 2016
New Revision: 307259
URL: https://svnweb.freebsd.org/changeset/base/307259
Log:
MFC 306482,306483
306482
hyperv/hn: If synthetic parts are detached, don't touch them.
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8065
306483
hyperv/hn: Fix detach and attach error handling.
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D8066
Modified:
stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h
stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h
==============================================================================
--- stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Oct 14 04:13:59
2016 (r307258)
+++ stable/10/sys/dev/hyperv/netvsc/hv_net_vsc.h Fri Oct 14 04:53:52
2016 (r307259)
@@ -253,6 +253,7 @@ 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: stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Oct 14
04:13:59 2016 (r307258)
+++ stable/10/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Fri Oct 14
04:53:52 2016 (r307259)
@@ -354,6 +354,7 @@ static void hn_resume(struct hn_softc *)
static void hn_rx_drain(struct vmbus_channel *);
static void hn_tx_resume(struct hn_softc *, int);
static void hn_tx_ring_qflush(struct hn_tx_ring *);
+static int netvsc_detach(device_t dev);
static void hn_nvs_handle_notify(struct hn_softc *sc,
const struct vmbus_chanpkt_hdr *pkt);
@@ -407,6 +408,9 @@ 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.
*
@@ -752,27 +756,28 @@ netvsc_attach(device_t dev)
return (0);
failed:
- /* TODO: reuse netvsc_detach() */
- hn_destroy_tx_data(sc);
- if (ifp != NULL)
- if_free(ifp);
+ if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED)
+ hn_synth_detach(sc);
+ netvsc_detach(dev);
return (error);
}
-/*
- * TODO: Use this for error handling on attach path.
- */
static int
netvsc_detach(device_t dev)
{
struct hn_softc *sc = device_get_softc(dev);
+ struct ifnet *ifp = sc->hn_ifp;
- /* TODO: ether_ifdetach */
-
- HN_LOCK(sc);
- /* TODO: hn_stop */
- hn_synth_detach(sc);
- HN_UNLOCK(sc);
+ if (device_is_attached(dev)) {
+ HN_LOCK(sc);
+ if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) {
+ if (ifp->if_drv_flags & IFF_DRV_RUNNING)
+ hn_stop(sc);
+ hn_synth_detach(sc);
+ }
+ HN_UNLOCK(sc);
+ ether_ifdetach(ifp);
+ }
ifmedia_removeall(&sc->hn_media);
hn_destroy_rx_data(sc);
@@ -781,10 +786,12 @@ netvsc_detach(device_t dev)
if (sc->hn_tx_taskq != hn_tx_taskq)
taskqueue_free(sc->hn_tx_taskq);
- vmbus_xact_ctx_destroy(sc->hn_xact);
- HN_LOCK_DESTROY(sc);
+ if (sc->hn_xact != NULL)
+ vmbus_xact_ctx_destroy(sc->hn_xact);
+
+ if_free(ifp);
- /* TODO: if_free */
+ HN_LOCK_DESTROY(sc);
return (0);
}
@@ -1638,6 +1645,11 @@ 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);
@@ -1691,6 +1703,11 @@ 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,
@@ -1802,6 +1819,9 @@ 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);
@@ -1878,6 +1898,9 @@ 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;
@@ -3397,6 +3420,9 @@ 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;
@@ -3509,6 +3535,8 @@ back:
error = hn_attach_subchans(sc);
if (error)
return (error);
+
+ sc->hn_flags |= HN_FLAG_SYNTH_ATTACHED;
return (0);
}
@@ -3522,6 +3550,9 @@ 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);
@@ -3530,6 +3561,8 @@ 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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