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RDMA/nes: Forward packets for a new connection with stale APBVT entry

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Under heavy traffic, there is a small windows when an APBVT entry is
not yet removed and a new connection is established.  Packets for the
new connection are dropped until APBVT entry is removed.  This patch
will forward the packets instead of dropping them.

Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Signed-off-by: Chien Tung <chien.tin.tung@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Faisal Latif
2008-11-21 20:50:49 -06:00
committed by Roland Dreier
parent 183ecfa309
commit 4a14f6a79f
3 changed files with 45 additions and 43 deletions
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42
drivers/infiniband/hw/nes/nes_hw.c
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@@ -2700,27 +2700,33 @@ void nes_nic_ce_handler(struct nes_device *nesdev, struct nes_hw_nic_cq *cq)
pkt_type, (pkt_type & NES_PKT_TYPE_APBVT_MASK)); */
if ((pkt_type & NES_PKT_TYPE_APBVT_MASK) == NES_PKT_TYPE_APBVT_BITS) {
nes_cm_recv(rx_skb, nesvnic->netdev);
if (nes_cm_recv(rx_skb, nesvnic->netdev))
rx_skb = NULL;
}
if (rx_skb == NULL)
goto skip_rx_indicate0;
if ((cqe_misc & NES_NIC_CQE_TAG_VALID) &&
(nesvnic->vlan_grp != NULL)) {
vlan_tag = (u16)(le32_to_cpu(
cq->cq_vbase[head].cqe_words[NES_NIC_CQE_TAG_PKT_TYPE_IDX])
>> 16);
nes_debug(NES_DBG_CQ, "%s: Reporting stripped VLAN packet. Tag = 0x%04X\n",
nesvnic->netdev->name, vlan_tag);
if (nes_use_lro)
lro_vlan_hwaccel_receive_skb(&nesvnic->lro_mgr, rx_skb,
nesvnic->vlan_grp, vlan_tag, NULL);
else
nes_vlan_rx(rx_skb, nesvnic->vlan_grp, vlan_tag);
} else {
if ((cqe_misc & NES_NIC_CQE_TAG_VALID) && (nesvnic->vlan_grp != NULL)) {
vlan_tag = (u16)(le32_to_cpu(
cq->cq_vbase[head].cqe_words[NES_NIC_CQE_TAG_PKT_TYPE_IDX])
>> 16);
nes_debug(NES_DBG_CQ, "%s: Reporting stripped VLAN packet. Tag = 0x%04X\n",
nesvnic->netdev->name, vlan_tag);
if (nes_use_lro)
lro_vlan_hwaccel_receive_skb(&nesvnic->lro_mgr, rx_skb,
nesvnic->vlan_grp, vlan_tag, NULL);
else
nes_vlan_rx(rx_skb, nesvnic->vlan_grp, vlan_tag);
} else {
if (nes_use_lro)
lro_receive_skb(&nesvnic->lro_mgr, rx_skb, NULL);
else
nes_netif_rx(rx_skb);
}
if (nes_use_lro)
lro_receive_skb(&nesvnic->lro_mgr, rx_skb, NULL);
else
nes_netif_rx(rx_skb);
}
skip_rx_indicate0:
nesvnic->netdev->last_rx = jiffies;
/* nesvnic->netstats.rx_packets++; */
/* nesvnic->netstats.rx_bytes += rx_pkt_size; */