Merge tag 'backport/v3.14.24-ltsi-rc1/phy-rcar-gen2-usb-to-v3.15' into backport/v3...

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / net / tun.c

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 8fe9cb7..ec63314 100644 (file)
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -65,6 +65,7 @@
 #include <linux/nsproxy.h>
 #include <linux/virtio_net.h>
 #include <linux/rcupdate.h>
+#include <net/ipv6.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
 #include <net/rtnetlink.h>
@@ -1140,6 +1141,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
                break;
        }
 
+       skb_reset_network_header(skb);
+
        if (gso.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
                pr_debug("GSO!\n");
                switch (gso.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
@@ -1151,6 +1154,8 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
                        break;
                case VIRTIO_NET_HDR_GSO_UDP:
                        skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
+                       if (skb->protocol == htons(ETH_P_IPV6))
+                               ipv6_proxy_select_ident(skb);
                        break;
                default:
                        tun->dev->stats.rx_frame_errors++;
@@ -1180,7 +1185,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
                skb_shinfo(skb)->tx_flags |= SKBTX_SHARED_FRAG;
        }
 
-       skb_reset_network_header(skb);
        skb_probe_transport_header(skb, 0);
 
        rxhash = skb_get_hash(skb);
@@ -1222,6 +1226,10 @@ static ssize_t tun_put_user(struct tun_struct *tun,
        struct tun_pi pi = { 0, skb->protocol };
        ssize_t total = 0;
        int vlan_offset = 0, copied;
+       int vlan_hlen = 0;
+
+       if (vlan_tx_tag_present(skb))
+               vlan_hlen = VLAN_HLEN;
 
        if (!(tun->flags & TUN_NO_PI)) {
                if ((len -= sizeof(pi)) < 0)
@@ -1273,7 +1281,8 @@ static ssize_t tun_put_user(struct tun_struct *tun,
 
                if (skb->ip_summed == CHECKSUM_PARTIAL) {
                        gso.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
-                       gso.csum_start = skb_checksum_start_offset(skb);
+                       gso.csum_start = skb_checksum_start_offset(skb) +
+                                        vlan_hlen;
                        gso.csum_offset = skb->csum_offset;
                } else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
                        gso.flags = VIRTIO_NET_HDR_F_DATA_VALID;
@@ -1286,10 +1295,9 @@ static ssize_t tun_put_user(struct tun_struct *tun,
        }
 
        copied = total;
-       total += skb->len;
-       if (!vlan_tx_tag_present(skb)) {
-               len = min_t(int, skb->len, len);
-       } else {
+       len = min_t(int, skb->len + vlan_hlen, len);
+       total += skb->len + vlan_hlen;
+       if (vlan_hlen) {
                int copy, ret;
                struct {
                        __be16 h_vlan_proto;
@@ -1300,8 +1308,6 @@ static ssize_t tun_put_user(struct tun_struct *tun,
                veth.h_vlan_TCI = htons(vlan_tx_tag_get(skb));
 
                vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto);
-               len = min_t(int, skb->len + VLAN_HLEN, len);
-               total += VLAN_HLEN;
 
                copy = min_t(int, vlan_offset, len);
                ret = skb_copy_datagram_const_iovec(skb, 0, iv, copied, copy);
@@ -1686,7 +1692,9 @@ static int tun_set_iff(struct net *net, struct file *file, struct ifreq *ifr)
                                   TUN_USER_FEATURES | NETIF_F_HW_VLAN_CTAG_TX |
                                   NETIF_F_HW_VLAN_STAG_TX;
                dev->features = dev->hw_features;
-               dev->vlan_features = dev->features;
+               dev->vlan_features = dev->features &
+                                    ~(NETIF_F_HW_VLAN_CTAG_TX |
+                                      NETIF_F_HW_VLAN_STAG_TX);
 
                INIT_LIST_HEAD(&tun->disabled);
                err = tun_attach(tun, file, false);