/*
* netvsc_recv_callback - Callback when we receive a packet from the
* "wire" on the specified device.
*/
int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet,
void **data,
struct ndis_tcp_ip_checksum_info *csum_info,
struct vmbus_channel *channel,
u16 vlan_tci)
{
struct net_device *net = hv_get_drvdata(device_obj);
struct net_device_context *net_device_ctx = netdev_priv(net);
struct net_device *vf_netdev;
struct sk_buff *skb;
struct netvsc_stats *rx_stats;
if (net->reg_state != NETREG_REGISTERED)
return NVSP_STAT_FAIL;
/*
* If necessary, inject this packet into the VF interface.
* On Hyper-V, multicast and brodcast packets are only delivered
* to the synthetic interface (after subjecting these to
* policy filters on the host). Deliver these via the VF
* interface in the guest.
*/
vf_netdev = rcu_dereference(net_device_ctx->vf_netdev);
if (vf_netdev && (vf_netdev->flags & IFF_UP))
net = vf_netdev;
/* Allocate a skb - TODO direct I/O to pages? */
skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci);
if (unlikely(!skb)) {
++net->stats.rx_dropped;
return NVSP_STAT_FAIL;
}
if (net != vf_netdev)
skb_record_rx_queue(skb,
channel->offermsg.offer.sub_channel_index);
/*
* Even if injecting the packet, record the statistics
* on the synthetic device because modifying the VF device
* statistics will not work correctly.
*/
rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->packets++;
rx_stats->bytes += packet->total_data_buflen;
if (skb->pkt_type == PACKET_BROADCAST)
++rx_stats->broadcast;
else if (skb->pkt_type == PACKET_MULTICAST)
++rx_stats->multicast;
u64_stats_update_end(&rx_stats->syncp);
/*
* Pass the skb back up. Network stack will deallocate the skb when it
* is done.
* TODO - use NAPI?
*/
netif_rx(skb);
return 0;
}
/*
* netvsc_recv_callback - Callback when we receive a packet from the
* "wire" on the specified device.
*/
int netvsc_recv_callback(struct net_device *net,
struct vmbus_channel *channel,
void *data, u32 len,
const struct ndis_tcp_ip_checksum_info *csum_info,
const struct ndis_pkt_8021q_info *vlan)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
struct netvsc_device *net_device;
u16 q_idx = channel->offermsg.offer.sub_channel_index;
struct netvsc_channel *nvchan;
struct net_device *vf_netdev;
struct sk_buff *skb;
struct netvsc_stats *rx_stats;
if (net->reg_state != NETREG_REGISTERED)
return NVSP_STAT_FAIL;
/*
* If necessary, inject this packet into the VF interface.
* On Hyper-V, multicast and brodcast packets are only delivered
* to the synthetic interface (after subjecting these to
* policy filters on the host). Deliver these via the VF
* interface in the guest.
*/
rcu_read_lock();
net_device = rcu_dereference(net_device_ctx->nvdev);
if (unlikely(!net_device))
goto drop;
nvchan = &net_device->chan_table[q_idx];
vf_netdev = rcu_dereference(net_device_ctx->vf_netdev);
if (vf_netdev && (vf_netdev->flags & IFF_UP))
net = vf_netdev;
/* Allocate a skb - TODO direct I/O to pages? */
skb = netvsc_alloc_recv_skb(net, &nvchan->napi,
csum_info, vlan, data, len);
if (unlikely(!skb)) {
drop:
++net->stats.rx_dropped;
rcu_read_unlock();
return NVSP_STAT_FAIL;
}
if (net != vf_netdev)
skb_record_rx_queue(skb, q_idx);
/*
* Even if injecting the packet, record the statistics
* on the synthetic device because modifying the VF device
* statistics will not work correctly.
*/
rx_stats = &nvchan->rx_stats;
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->packets++;
rx_stats->bytes += len;
if (skb->pkt_type == PACKET_BROADCAST)
++rx_stats->broadcast;
else if (skb->pkt_type == PACKET_MULTICAST)
++rx_stats->multicast;
u64_stats_update_end(&rx_stats->syncp);
napi_gro_receive(&nvchan->napi, skb);
rcu_read_unlock();
return 0;
}
/*
* netvsc_recv_callback - Callback when we receive a packet from the
* "wire" on the specified device.
*/
int netvsc_recv_callback(struct hv_device *device_obj,
struct hv_netvsc_packet *packet,
void **data,
struct ndis_tcp_ip_checksum_info *csum_info,
struct vmbus_channel *channel,
u16 vlan_tci)
{
struct net_device *net = hv_get_drvdata(device_obj);
struct net_device_context *net_device_ctx = netdev_priv(net);
struct sk_buff *skb;
struct sk_buff *vf_skb;
struct netvsc_stats *rx_stats;
struct netvsc_device *netvsc_dev = net_device_ctx->nvdev;
u32 bytes_recvd = packet->total_data_buflen;
int ret = 0;
if (!net || net->reg_state != NETREG_REGISTERED)
return NVSP_STAT_FAIL;
if (READ_ONCE(netvsc_dev->vf_inject)) {
atomic_inc(&netvsc_dev->vf_use_cnt);
if (!READ_ONCE(netvsc_dev->vf_inject)) {
/*
* We raced; just move on.
*/
atomic_dec(&netvsc_dev->vf_use_cnt);
goto vf_injection_done;
}
/*
* Inject this packet into the VF inerface.
* On Hyper-V, multicast and brodcast packets
* are only delivered on the synthetic interface
* (after subjecting these to policy filters on
* the host). Deliver these via the VF interface
* in the guest.
*/
vf_skb = netvsc_alloc_recv_skb(netvsc_dev->vf_netdev, packet,
csum_info, *data, vlan_tci);
if (vf_skb != NULL) {
++netvsc_dev->vf_netdev->stats.rx_packets;
netvsc_dev->vf_netdev->stats.rx_bytes += bytes_recvd;
netif_receive_skb(vf_skb);
} else {
++net->stats.rx_dropped;
ret = NVSP_STAT_FAIL;
}
atomic_dec(&netvsc_dev->vf_use_cnt);
return ret;
}
vf_injection_done:
net_device_ctx = netdev_priv(net);
rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);
/* Allocate a skb - TODO direct I/O to pages? */
skb = netvsc_alloc_recv_skb(net, packet, csum_info, *data, vlan_tci);
if (unlikely(!skb)) {
++net->stats.rx_dropped;
return NVSP_STAT_FAIL;
}
skb_record_rx_queue(skb, channel->
offermsg.offer.sub_channel_index);
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->packets++;
rx_stats->bytes += packet->total_data_buflen;
u64_stats_update_end(&rx_stats->syncp);
/*
* Pass the skb back up. Network stack will deallocate the skb when it
* is done.
* TODO - use NAPI?
*/
netif_rx(skb);
return 0;
}
/*
* netvsc_recv_callback - Callback when we receive a packet from the
* "wire" on the specified device.
*/
int netvsc_recv_callback(struct net_device *net,
struct vmbus_channel *channel,
void *data, u32 len,
const struct ndis_tcp_ip_checksum_info *csum_info,
const struct ndis_pkt_8021q_info *vlan)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
struct netvsc_device *net_device = net_device_ctx->nvdev;
u16 q_idx = channel->offermsg.offer.sub_channel_index;
struct netvsc_channel *nvchan = &net_device->chan_table[q_idx];
struct sk_buff *skb;
struct sk_buff *vf_skb;
struct netvsc_stats *rx_stats;
int ret = 0;
if (!net || net->reg_state != NETREG_REGISTERED)
return NVSP_STAT_FAIL;
if (READ_ONCE(net_device_ctx->vf_inject)) {
atomic_inc(&net_device_ctx->vf_use_cnt);
if (!READ_ONCE(net_device_ctx->vf_inject)) {
/*
* We raced; just move on.
*/
atomic_dec(&net_device_ctx->vf_use_cnt);
goto vf_injection_done;
}
/*
* Inject this packet into the VF inerface.
* On Hyper-V, multicast and brodcast packets
* are only delivered on the synthetic interface
* (after subjecting these to policy filters on
* the host). Deliver these via the VF interface
* in the guest.
*/
vf_skb = netvsc_alloc_recv_skb(net_device_ctx->vf_netdev,
csum_info, vlan, data, len);
if (vf_skb != NULL) {
++net_device_ctx->vf_netdev->stats.rx_packets;
net_device_ctx->vf_netdev->stats.rx_bytes +=
len;
netif_receive_skb(vf_skb);
} else {
++net->stats.rx_dropped;
ret = NVSP_STAT_FAIL;
}
atomic_dec(&net_device_ctx->vf_use_cnt);
return ret;
}
vf_injection_done:
rx_stats = &nvchan->rx_stats;
/* Allocate a skb - TODO direct I/O to pages? */
skb = netvsc_alloc_recv_skb(net, csum_info, vlan, data, len);
if (unlikely(!skb)) {
++net->stats.rx_dropped;
return NVSP_STAT_FAIL;
}
skb_record_rx_queue(skb, q_idx);
u64_stats_update_begin(&rx_stats->syncp);
rx_stats->packets++;
rx_stats->bytes += len;
if (skb->pkt_type == PACKET_BROADCAST)
++rx_stats->broadcast;
else if (skb->pkt_type == PACKET_MULTICAST)
++rx_stats->multicast;
u64_stats_update_end(&rx_stats->syncp);
net->stats.rx_packets++;
net->stats.rx_bytes += len;
napi_gro_receive(&nvchan->napi, skb);
return 0;
}