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diff --git a/sys/dev/hyperv/netvsc/hn_rndis.h b/sys/dev/hyperv/netvsc/hn_rndis.h
--- a/sys/dev/hyperv/netvsc/hn_rndis.h
+++ b/sys/dev/hyperv/netvsc/hn_rndis.h
@@ -46,5 +46,6 @@
int hn_rndis_set_rxfilter(struct hn_softc *sc, uint32_t filter);
void hn_rndis_rx_ctrl(struct hn_softc *sc, const void *data,
int dlen);
+int hn_rndis_reconf_offload(struct hn_softc *sc, int mtu);
#endif /* !_HN_RNDIS_H_ */
diff --git a/sys/dev/hyperv/netvsc/hn_rndis.c b/sys/dev/hyperv/netvsc/hn_rndis.c
--- a/sys/dev/hyperv/netvsc/hn_rndis.c
+++ b/sys/dev/hyperv/netvsc/hn_rndis.c
@@ -579,6 +579,12 @@
return (error);
}
+int
+hn_rndis_reconf_offload(struct hn_softc *sc, int mtu)
+{
+ return(hn_rndis_conf_offload(sc, mtu));
+}
+
static int
hn_rndis_conf_offload(struct hn_softc *sc, int mtu)
{
@@ -725,7 +731,8 @@
/* RSC offload */
if (hwcaps.ndis_hdr.ndis_rev >= NDIS_OFFLOAD_PARAMS_REV_3) {
- if (hwcaps.ndis_rsc.ndis_ip4 && hwcaps.ndis_rsc.ndis_ip6) {
+ if (hwcaps.ndis_rsc.ndis_ip4 && hwcaps.ndis_rsc.ndis_ip6 &&
+ sc->hn_rsc_ctrl) {
params.ndis_rsc_ip4 = NDIS_OFFLOAD_RSC_ON;
params.ndis_rsc_ip6 = NDIS_OFFLOAD_RSC_ON;
} else {
diff --git a/sys/dev/hyperv/netvsc/if_hn.c b/sys/dev/hyperv/netvsc/if_hn.c
--- a/sys/dev/hyperv/netvsc/if_hn.c
+++ b/sys/dev/hyperv/netvsc/if_hn.c
@@ -454,6 +454,8 @@
static void hn_start_txeof_taskfunc(void *, int);
#endif
+static int hn_rsc_sysctl(SYSCTL_HANDLER_ARGS);
+
SYSCTL_NODE(_hw, OID_AUTO, hn, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
"Hyper-V network interface");
@@ -2370,6 +2372,10 @@
"Accurate BPF for transparent VF");
}
+ SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rsc_switch",
+ CTLTYPE_UINT | CTLFLAG_RW, sc, 0, hn_rsc_sysctl, "A",
+ "switch to rsc");
+
/*
* Setup the ifmedia, which has been initialized earlier.
*/
@@ -4567,6 +4573,30 @@
return sysctl_handle_string(oidp, filter_str, sizeof(filter_str), req);
}
+static int
+hn_rsc_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ struct hn_softc *sc = arg1;
+ uint32_t mtu;
+ int error;
+ HN_LOCK(sc);
+ error = hn_rndis_get_mtu(sc, &mtu);
+ if (error) {
+ if_printf(sc->hn_ifp, "failed to get mtu\n");
+ goto back;
+ }
+ error = SYSCTL_OUT(req, &(sc->hn_rsc_ctrl), sizeof(sc->hn_rsc_ctrl));
+ if (error || req->newptr == NULL)
+ goto back;
+
+ error = SYSCTL_IN(req, &(sc->hn_rsc_ctrl), sizeof(sc->hn_rsc_ctrl));
+ if (error)
+ goto back;
+ error = hn_rndis_reconf_offload(sc, mtu);
+back:
+ HN_UNLOCK(sc);
+ return (error);
+}
#ifndef RSS
static int
diff --git a/sys/dev/hyperv/netvsc/if_hnvar.h b/sys/dev/hyperv/netvsc/if_hnvar.h
--- a/sys/dev/hyperv/netvsc/if_hnvar.h
+++ b/sys/dev/hyperv/netvsc/if_hnvar.h
@@ -282,6 +282,11 @@
u_int hn_saved_tsomax;
u_int hn_saved_tsosegcnt;
u_int hn_saved_tsosegsz;
+
+ /*
+ * RSC switch, default off
+ */
+ u_int hn_rsc_ctrl;
};
#define HN_FLAG_RXBUF_CONNECTED 0x0001

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