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authorKlaus D. Wacker <kdwacker@de.ibm.com>2007-08-29 11:26:58 +0200
committerJeff Garzik <jeff@garzik.org>2007-08-31 06:52:58 -0400
commit54d0f56e63edb1aa3901ea6389bf7ea5d43d0c22 (patch)
treeb94d156937b8fe39041c2db4f5c832fc8c2afbd0 /drivers
parent6e55cab9f004e6e7a9ab5d7b27fb705ed0de838e (diff)
qeth: Drop ARP packages on HiperSockets interface with NOARP attribute.
A network interface can get ARP packets even when the interface has NOARP specified. In a HiperSockets environment this disturbs receiving systems when packets are sent on the multicast queue. (E.g. TCP/IP on z/VM issues messages reporting invalid data on the HiperSockets interface.) Qeth will no longer send ARP packets on HiperSockets interface when interface has the NOARP attribute. Signed-off-by: Klaus D. Wacker <kdwacker@de.ibm.com> Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/s390/net/qeth_main.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 617fbfd767fa..f3e6fbeb2123 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -2505,7 +2505,7 @@ qeth_rebuild_skb_fake_ll_tr(struct qeth_card *card, struct sk_buff *skb,
struct iphdr *ip_hdr;
QETH_DBF_TEXT(trace,5,"skbfktr");
- skb_set_mac_header(skb, -QETH_FAKE_LL_LEN_TR);
+ skb_set_mac_header(skb, (int)-QETH_FAKE_LL_LEN_TR);
/* this is a fake ethernet header */
fake_hdr = tr_hdr(skb);
@@ -4710,9 +4710,15 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
if (card->info.type != QETH_CARD_TYPE_IQD)
rc = qeth_do_send_packet(card, queue, new_skb, hdr,
elements_needed, ctx);
- else
+ else {
+ if ((skb->protocol == htons(ETH_P_ARP)) &&
+ (card->dev->flags & IFF_NOARP)) {
+ __qeth_free_new_skb(skb, new_skb);
+ return -EPERM;
+ }
rc = qeth_do_send_packet_fast(card, queue, new_skb, hdr,
elements_needed, ctx);
+ }
if (!rc) {
card->stats.tx_packets++;
card->stats.tx_bytes += tx_bytes;