s390: qeth driver fixes: packet socket

    - packet socket support is not complete.
      Recvfrom a packet socket does not fill the sockaddr_ll structure.
      device function hard_header_parse is not implemented.
      For layer 2 mode and layer 3 mode with fake_ll turned on, we have
      the information to fill sockaddr_ll.

Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 53 insertions, 5 deletions

diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 015dc4c9fc16..bfc37bae19bc 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -3952,13 +3952,22 @@ static inline struct sk_buff *
 qeth_prepare_skb(struct qeth_card *card, struct sk_buff *skb,
                  struct qeth_hdr **hdr, int ipv)
 {
-        struct sk_buff *new_skb;
+        struct sk_buff *new_skb, *new_skb2;
         
         QETH_DBF_TEXT(trace, 6, "prepskb");
-
-        new_skb = qeth_realloc_headroom(card, skb, sizeof(struct qeth_hdr));
-        if (new_skb == NULL)
+        new_skb = skb;
+        new_skb = qeth_pskb_unshare(skb, GFP_ATOMIC);
+        if (!new_skb)
                 return NULL;
+        new_skb2 = qeth_realloc_headroom(card, new_skb,
+                                         sizeof(struct qeth_hdr));
+        if (!new_skb2) {
+                __qeth_free_new_skb(skb, new_skb);
+                return NULL;
+        }
+        if (new_skb != skb)
+                __qeth_free_new_skb(new_skb2, new_skb);
+        new_skb = new_skb2;
         *hdr = __qeth_prepare_skb(card, new_skb, ipv);
         if (*hdr == NULL) {
                 __qeth_free_new_skb(skb, new_skb);
@@ -6339,6 +6348,42 @@ static struct ethtool_ops qeth_ethtool_ops = {
 };
 
 static int
+qeth_hard_header_parse(struct sk_buff *skb, unsigned char *haddr)
+{
+        struct qeth_card *card;
+        struct ethhdr *eth;
+
+        card = qeth_get_card_from_dev(skb->dev);
+        if (card->options.layer2)
+                goto haveheader;
+#ifdef CONFIG_QETH_IPV6
+        /* cause of the manipulated arp constructor and the ARP
+           flag for OSAE devices we have some nasty exceptions */
+        if (card->info.type == QETH_CARD_TYPE_OSAE) {
+                if (!card->options.fake_ll) {
+                        if ((skb->pkt_type==PACKET_OUTGOING) &&
+                            (skb->protocol==ETH_P_IPV6))
+                                goto haveheader;
+                        else
+                                return 0;
+                } else {
+                        if ((skb->pkt_type==PACKET_OUTGOING) &&
+                            (skb->protocol==ETH_P_IP))
+                                return 0;
+                        else
+                                goto haveheader;
+                }
+        }
+#endif
+        if (!card->options.fake_ll)
+                return 0;
+haveheader:
+        eth = eth_hdr(skb);
+        memcpy(haddr, eth->h_source, ETH_ALEN);
+        return ETH_ALEN;
+}
+
+static int
 qeth_netdev_init(struct net_device *dev)
 {
         struct qeth_card *card;
@@ -6376,7 +6421,10 @@ qeth_netdev_init(struct net_device *dev)
         if (card->options.fake_ll &&
                 (qeth_get_netdev_flags(card) & IFF_NOARP))
                         dev->hard_header = qeth_fake_header;
-        dev->hard_header_parse = NULL;
+        if (dev->type == ARPHRD_IEEE802_TR)
+                dev->hard_header_parse = NULL;
+        else
+                dev->hard_header_parse = qeth_hard_header_parse;
         dev->set_mac_address = qeth_layer2_set_mac_address;
         dev->flags |= qeth_get_netdev_flags(card);
         if ((card->options.fake_broadcast) ||