forked from Minki/linux
Merge branch 'hv_netvsc-next'
Stephen Hemminger says: ==================== hv_netvsc changes These are mostly about improving the handling of interaction between the virtual network device (netvsc) and the SR-IOV VF network device. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
commit
c14fec3969
@ -649,6 +649,8 @@ struct multi_recv_comp {
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struct netvsc_stats {
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u64 packets;
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u64 bytes;
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u64 broadcast;
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u64 multicast;
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struct u64_stats_sync syncp;
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};
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@ -695,9 +697,8 @@ struct net_device_context {
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bool start_remove;
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/* State to manage the associated VF interface. */
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struct net_device *vf_netdev;
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bool vf_inject;
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atomic_t vf_use_cnt;
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struct net_device __rcu *vf_netdev;
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/* 1: allocated, serial number is valid. 0: not allocated */
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u32 vf_alloc;
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/* Serial number of the VF to team with */
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@ -635,7 +635,7 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device,
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q_idx = nvsc_packet->q_idx;
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channel = incoming_channel;
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dev_kfree_skb_any(skb);
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dev_consume_skb_any(skb);
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}
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num_outstanding_sends =
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@ -944,7 +944,7 @@ int netvsc_send(struct hv_device *device,
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}
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if (msdp->skb)
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dev_kfree_skb_any(msdp->skb);
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dev_consume_skb_any(msdp->skb);
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if (xmit_more && !packet->cp_partial) {
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msdp->skb = skb;
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@ -667,51 +667,23 @@ int netvsc_recv_callback(struct hv_device *device_obj,
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{
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struct net_device *net = hv_get_drvdata(device_obj);
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struct net_device_context *net_device_ctx = netdev_priv(net);
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struct net_device *vf_netdev;
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struct sk_buff *skb;
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struct sk_buff *vf_skb;
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struct netvsc_stats *rx_stats;
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u32 bytes_recvd = packet->total_data_buflen;
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int ret = 0;
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if (!net || net->reg_state != NETREG_REGISTERED)
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if (net->reg_state != NETREG_REGISTERED)
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return NVSP_STAT_FAIL;
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if (READ_ONCE(net_device_ctx->vf_inject)) {
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atomic_inc(&net_device_ctx->vf_use_cnt);
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if (!READ_ONCE(net_device_ctx->vf_inject)) {
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/*
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* We raced; just move on.
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*/
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atomic_dec(&net_device_ctx->vf_use_cnt);
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goto vf_injection_done;
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}
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/*
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* Inject this packet into the VF inerface.
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* On Hyper-V, multicast and brodcast packets
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* are only delivered on the synthetic interface
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* (after subjecting these to policy filters on
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* the host). Deliver these via the VF interface
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* in the guest.
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*/
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vf_skb = netvsc_alloc_recv_skb(net_device_ctx->vf_netdev,
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packet, csum_info, *data,
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vlan_tci);
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if (vf_skb != NULL) {
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++net_device_ctx->vf_netdev->stats.rx_packets;
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net_device_ctx->vf_netdev->stats.rx_bytes +=
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bytes_recvd;
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netif_receive_skb(vf_skb);
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} else {
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++net->stats.rx_dropped;
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ret = NVSP_STAT_FAIL;
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}
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atomic_dec(&net_device_ctx->vf_use_cnt);
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return ret;
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}
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vf_injection_done:
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rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
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/*
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* If necessary, inject this packet into the VF interface.
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* On Hyper-V, multicast and brodcast packets are only delivered
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* to the synthetic interface (after subjecting these to
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* policy filters on the host). Deliver these via the VF
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* interface in the guest.
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*/
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vf_netdev = rcu_dereference(net_device_ctx->vf_netdev);
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if (vf_netdev && (vf_netdev->flags & IFF_UP))
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net = vf_netdev;
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/* Allocate a skb - TODO direct I/O to pages? */
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skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci);
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@ -719,12 +691,25 @@ vf_injection_done:
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++net->stats.rx_dropped;
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return NVSP_STAT_FAIL;
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}
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skb_record_rx_queue(skb, channel->
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offermsg.offer.sub_channel_index);
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if (net != vf_netdev)
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skb_record_rx_queue(skb,
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channel->offermsg.offer.sub_channel_index);
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/*
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* Even if injecting the packet, record the statistics
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* on the synthetic device because modifying the VF device
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* statistics will not work correctly.
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*/
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rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
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u64_stats_update_begin(&rx_stats->syncp);
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rx_stats->packets++;
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rx_stats->bytes += packet->total_data_buflen;
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if (skb->pkt_type == PACKET_BROADCAST)
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++rx_stats->broadcast;
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else if (skb->pkt_type == PACKET_MULTICAST)
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++rx_stats->multicast;
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u64_stats_update_end(&rx_stats->syncp);
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/*
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@ -967,7 +952,7 @@ static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net,
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cpu);
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struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats,
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cpu);
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u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
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u64 tx_packets, tx_bytes, rx_packets, rx_bytes, rx_multicast;
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unsigned int start;
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do {
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@ -980,12 +965,14 @@ static struct rtnl_link_stats64 *netvsc_get_stats64(struct net_device *net,
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start = u64_stats_fetch_begin_irq(&rx_stats->syncp);
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rx_packets = rx_stats->packets;
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rx_bytes = rx_stats->bytes;
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rx_multicast = rx_stats->multicast + rx_stats->broadcast;
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} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));
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t->tx_bytes += tx_bytes;
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t->tx_packets += tx_packets;
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t->rx_bytes += rx_bytes;
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t->rx_packets += rx_packets;
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t->multicast += rx_multicast;
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}
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t->tx_dropped = net->stats.tx_dropped;
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@ -1215,22 +1202,44 @@ static void netvsc_free_netdev(struct net_device *netdev)
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free_netdev(netdev);
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}
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static struct net_device *get_netvsc_net_device(char *mac)
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static struct net_device *get_netvsc_bymac(const u8 *mac)
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{
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struct net_device *dev, *found = NULL;
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struct net_device *dev;
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ASSERT_RTNL();
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for_each_netdev(&init_net, dev) {
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if (memcmp(dev->dev_addr, mac, ETH_ALEN) == 0) {
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if (dev->netdev_ops != &device_ops)
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continue;
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found = dev;
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break;
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}
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if (dev->netdev_ops != &device_ops)
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continue; /* not a netvsc device */
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if (ether_addr_equal(mac, dev->perm_addr))
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return dev;
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}
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return found;
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return NULL;
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}
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static struct net_device *get_netvsc_byref(struct net_device *vf_netdev)
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{
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struct net_device *dev;
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ASSERT_RTNL();
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for_each_netdev(&init_net, dev) {
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struct net_device_context *net_device_ctx;
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if (dev->netdev_ops != &device_ops)
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continue; /* not a netvsc device */
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net_device_ctx = netdev_priv(dev);
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if (net_device_ctx->nvdev == NULL)
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continue; /* device is removed */
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if (rtnl_dereference(net_device_ctx->vf_netdev) == vf_netdev)
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return dev; /* a match */
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}
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return NULL;
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}
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static int netvsc_register_vf(struct net_device *vf_netdev)
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@ -1238,9 +1247,8 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
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struct net_device *ndev;
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struct net_device_context *net_device_ctx;
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struct netvsc_device *netvsc_dev;
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const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops;
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if (eth_ops == NULL || eth_ops == ðtool_ops)
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if (vf_netdev->addr_len != ETH_ALEN)
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return NOTIFY_DONE;
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/*
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@ -1248,13 +1256,13 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
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* associate with the VF interface. If we don't find a matching
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* synthetic interface, move on.
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*/
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ndev = get_netvsc_net_device(vf_netdev->dev_addr);
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ndev = get_netvsc_bymac(vf_netdev->perm_addr);
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if (!ndev)
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return NOTIFY_DONE;
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net_device_ctx = netdev_priv(ndev);
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netvsc_dev = net_device_ctx->nvdev;
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if (!netvsc_dev || net_device_ctx->vf_netdev)
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if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev))
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return NOTIFY_DONE;
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netdev_info(ndev, "VF registering: %s\n", vf_netdev->name);
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@ -1262,46 +1270,26 @@ static int netvsc_register_vf(struct net_device *vf_netdev)
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* Take a reference on the module.
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*/
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try_module_get(THIS_MODULE);
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net_device_ctx->vf_netdev = vf_netdev;
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dev_hold(vf_netdev);
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rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev);
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return NOTIFY_OK;
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}
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static void netvsc_inject_enable(struct net_device_context *net_device_ctx)
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{
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net_device_ctx->vf_inject = true;
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}
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static void netvsc_inject_disable(struct net_device_context *net_device_ctx)
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{
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net_device_ctx->vf_inject = false;
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/* Wait for currently active users to drain out. */
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while (atomic_read(&net_device_ctx->vf_use_cnt) != 0)
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udelay(50);
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}
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static int netvsc_vf_up(struct net_device *vf_netdev)
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{
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struct net_device *ndev;
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struct netvsc_device *netvsc_dev;
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const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops;
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struct net_device_context *net_device_ctx;
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if (eth_ops == ðtool_ops)
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return NOTIFY_DONE;
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ndev = get_netvsc_net_device(vf_netdev->dev_addr);
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ndev = get_netvsc_byref(vf_netdev);
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if (!ndev)
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return NOTIFY_DONE;
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net_device_ctx = netdev_priv(ndev);
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netvsc_dev = net_device_ctx->nvdev;
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if (!netvsc_dev || !net_device_ctx->vf_netdev)
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return NOTIFY_DONE;
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netdev_info(ndev, "VF up: %s\n", vf_netdev->name);
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netvsc_inject_enable(net_device_ctx);
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/*
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* Open the device before switching data path.
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@ -1327,23 +1315,15 @@ static int netvsc_vf_down(struct net_device *vf_netdev)
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struct net_device *ndev;
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struct netvsc_device *netvsc_dev;
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struct net_device_context *net_device_ctx;
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const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops;
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if (eth_ops == ðtool_ops)
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return NOTIFY_DONE;
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ndev = get_netvsc_net_device(vf_netdev->dev_addr);
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ndev = get_netvsc_byref(vf_netdev);
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if (!ndev)
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return NOTIFY_DONE;
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net_device_ctx = netdev_priv(ndev);
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netvsc_dev = net_device_ctx->nvdev;
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if (!netvsc_dev || !net_device_ctx->vf_netdev)
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return NOTIFY_DONE;
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netdev_info(ndev, "VF down: %s\n", vf_netdev->name);
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netvsc_inject_disable(net_device_ctx);
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netvsc_switch_datapath(ndev, false);
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netdev_info(ndev, "Data path switched from VF: %s\n", vf_netdev->name);
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rndis_filter_close(netvsc_dev);
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@ -1359,23 +1339,19 @@ static int netvsc_unregister_vf(struct net_device *vf_netdev)
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{
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struct net_device *ndev;
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struct netvsc_device *netvsc_dev;
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const struct ethtool_ops *eth_ops = vf_netdev->ethtool_ops;
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struct net_device_context *net_device_ctx;
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if (eth_ops == ðtool_ops)
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return NOTIFY_DONE;
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ndev = get_netvsc_net_device(vf_netdev->dev_addr);
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ndev = get_netvsc_byref(vf_netdev);
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if (!ndev)
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return NOTIFY_DONE;
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net_device_ctx = netdev_priv(ndev);
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netvsc_dev = net_device_ctx->nvdev;
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if (!netvsc_dev || !net_device_ctx->vf_netdev)
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return NOTIFY_DONE;
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netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name);
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netvsc_inject_disable(net_device_ctx);
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net_device_ctx->vf_netdev = NULL;
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RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL);
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dev_put(vf_netdev);
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module_put(THIS_MODULE);
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return NOTIFY_OK;
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}
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@ -1427,10 +1403,6 @@ static int netvsc_probe(struct hv_device *dev,
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spin_lock_init(&net_device_ctx->lock);
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INIT_LIST_HEAD(&net_device_ctx->reconfig_events);
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atomic_set(&net_device_ctx->vf_use_cnt, 0);
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net_device_ctx->vf_netdev = NULL;
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net_device_ctx->vf_inject = false;
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net->netdev_ops = &device_ops;
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net->hw_features = NETVSC_HW_FEATURES;
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@ -1539,13 +1511,21 @@ static int netvsc_netdev_event(struct notifier_block *this,
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{
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struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
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/* Skip our own events */
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if (event_dev->netdev_ops == &device_ops)
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return NOTIFY_DONE;
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/* Avoid non-Ethernet type devices */
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if (event_dev->type != ARPHRD_ETHER)
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return NOTIFY_DONE;
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/* Avoid Vlan dev with same MAC registering as VF */
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if (event_dev->priv_flags & IFF_802_1Q_VLAN)
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return NOTIFY_DONE;
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/* Avoid Bonding master dev with same MAC registering as VF */
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if (event_dev->priv_flags & IFF_BONDING &&
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event_dev->flags & IFF_MASTER)
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if ((event_dev->priv_flags & IFF_BONDING) &&
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(event_dev->flags & IFF_MASTER))
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return NOTIFY_DONE;
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switch (event) {
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