Author: sephe
Date: Thu Sep  1 07:04:47 2016
New Revision: 305179
URL: https://svnweb.freebsd.org/changeset/base/305179

Log:
  hyperv/hn: Fix VLAN tag construction.
  
  MFC after:    1 week
  Sponsored by: Microsoft
  Differential Revision:        https://reviews.freebsd.org/D7716

Modified:
  head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
  head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
  head/sys/dev/hyperv/netvsc/if_hnvar.h
  head/sys/dev/hyperv/netvsc/ndis.h

Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c  Thu Sep  1 06:35:13 
2016        (r305178)
+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c  Thu Sep  1 07:04:47 
2016        (r305179)
@@ -1412,8 +1412,11 @@ netvsc_recv(struct hn_rx_ring *rxr, cons
                }
        }
 skip:
-       if (info->vlan_info != NULL) {
-               m_new->m_pkthdr.ether_vtag = info->vlan_info->u1.s1.vlan_id;
+       if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) {
+               m_new->m_pkthdr.ether_vtag = EVL_MAKETAG(
+                   NDIS_VLAN_INFO_ID(info->vlan_info),
+                   NDIS_VLAN_INFO_PRI(info->vlan_info),
+                   NDIS_VLAN_INFO_CFI(info->vlan_info));
                m_new->m_flags |= M_VLANTAG;
        }
 

Modified: head/sys/dev/hyperv/netvsc/hv_rndis_filter.c
==============================================================================
--- head/sys/dev/hyperv/netvsc/hv_rndis_filter.c        Thu Sep  1 06:35:13 
2016        (r305178)
+++ head/sys/dev/hyperv/netvsc/hv_rndis_filter.c        Thu Sep  1 07:04:47 
2016        (r305179)
@@ -156,7 +156,7 @@ hv_rf_find_recvinfo(const rndis_packet *
        const struct rndis_pktinfo *pi;
        uint32_t mask = 0, len;
 
-       info->vlan_info = NULL;
+       info->vlan_info = HN_NDIS_VLAN_INFO_INVALID;
        info->csum_info = NULL;
        info->hash_info = NULL;
        info->hash_value = NULL;
@@ -193,9 +193,9 @@ hv_rf_find_recvinfo(const rndis_packet *
 
                switch (pi->rm_type) {
                case ieee_8021q_info:
-                       if (__predict_false(dlen < sizeof(ndis_8021q_info)))
+                       if (__predict_false(dlen < NDIS_VLAN_INFO_SIZE))
                                return (EINVAL);
-                       info->vlan_info = data;
+                       info->vlan_info = *((const uint32_t *)data);
                        mask |= HV_RF_RECVINFO_VLAN;
                        break;
 

Modified: head/sys/dev/hyperv/netvsc/if_hnvar.h
==============================================================================
--- head/sys/dev/hyperv/netvsc/if_hnvar.h       Thu Sep  1 06:35:13 2016        
(r305178)
+++ head/sys/dev/hyperv/netvsc/if_hnvar.h       Thu Sep  1 07:04:47 2016        
(r305179)
@@ -55,8 +55,10 @@ struct rndix_hash_value;
 struct ndis_8021q_info_;
 struct rndis_tcp_ip_csum_info_;
 
+#define HN_NDIS_VLAN_INFO_INVALID      0xffffffff
+
 struct hn_recvinfo {
-       const struct ndis_8021q_info_   *vlan_info;
+       uint32_t                        vlan_info;
        const struct rndis_tcp_ip_csum_info_ *csum_info;
        const struct rndis_hash_info    *hash_info;
        const struct rndis_hash_value   *hash_value;

Modified: head/sys/dev/hyperv/netvsc/ndis.h
==============================================================================
--- head/sys/dev/hyperv/netvsc/ndis.h   Thu Sep  1 06:35:13 2016        
(r305178)
+++ head/sys/dev/hyperv/netvsc/ndis.h   Thu Sep  1 07:04:47 2016        
(r305179)
@@ -203,4 +203,20 @@ struct ndis_rssprm_toeplitz {
        uint32_t                        rss_ind[NDIS_HASH_INDCNT];
 };
 
+/*
+ * Per-packet-info
+ */
+
+/* VLAN */
+#define        NDIS_VLAN_INFO_SIZE             sizeof(uint32_t)
+#define        NDIS_VLAN_INFO_PRI_MASK         0x0007
+#define        NDIS_VLAN_INFO_CFI_MASK         0x0008
+#define        NDIS_VLAN_INFO_ID_MASK          0xfff0
+#define        NDIS_VLAN_INFO_MAKE(id, pri, cfi)       \
+        (((pri) & NVIS_VLAN_INFO_PRI_MASK) |   \
+        (((cfi) & 0x1) << 3) | (((id) & 0xfff) << 4))
+#define        NDIS_VLAN_INFO_ID(inf)          (((inf) & 
NDIS_VLAN_INFO_ID_MASK) >> 4)
+#define        NDIS_VLAN_INFO_CFI(inf)         (((inf) & 
NDIS_VLAN_INFO_CFI_MASK) >> 3)
+#define        NDIS_VLAN_INFO_PRI(inf)         ((inf) & 
NDIS_VLAN_INFO_PRI_MASK)
+
 #endif /* !_NET_NDIS_H_ */
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