From 1f5f3a75e216fe771b8d6805e0bb2f43595a6ee1 Mon Sep 17 00:00:00 2001 From: Haiyang Zhang Date: Mon, 12 Mar 2012 10:20:50 +0000 Subject: [PATCH] net/hyperv: Add support for vlan trunking from guests With this feature, a Linux guest can now configure multiple vlans through a single synthetic NIC on Win8 Hyper-V host. Signed-off-by: Haiyang Zhang Reviewed-by: K. Y. Srinivasan Signed-off-by: David S. Miller --- drivers/net/hyperv/hyperv_net.h | 34 +++++++++++++++++- drivers/net/hyperv/netvsc.c | 3 +- drivers/net/hyperv/netvsc_drv.c | 8 +++-- drivers/net/hyperv/rndis_filter.c | 60 +++++++++++++++++++++++++++++++ 4 files changed, 101 insertions(+), 4 deletions(-) diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index dec5836ae075..c35824552792 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -49,6 +49,7 @@ struct hv_netvsc_packet { struct hv_device *device; bool is_data_pkt; + u16 vlan_tci; /* * Valid only for receives when we break a xfer page packet @@ -926,9 +927,40 @@ struct rndis_oobd { struct rndis_per_packet_info { u32 size; u32 type; - u32 per_pkt_info_offset; + u32 ppi_offset; +}; + +enum ndis_per_pkt_info_type { + TCPIP_CHKSUM_PKTINFO, + IPSEC_PKTINFO, + TCP_LARGESEND_PKTINFO, + CLASSIFICATION_HANDLE_PKTINFO, + NDIS_RESERVED, + SG_LIST_PKTINFO, + IEEE_8021Q_INFO, + ORIGINAL_PKTINFO, + PACKET_CANCEL_ID, + ORIGINAL_NET_BUFLIST, + CACHED_NET_BUFLIST, + SHORT_PKT_PADINFO, + MAX_PER_PKT_INFO +}; + +struct ndis_pkt_8021q_info { + union { + struct { + u32 pri:3; /* User Priority */ + u32 cfi:1; /* Canonical Format ID */ + u32 vlanid:12; /* VLAN ID */ + u32 reserved:16; + }; + u32 value; + }; }; +#define NDIS_VLAN_PPI_SIZE (sizeof(struct rndis_per_packet_info) + \ + sizeof(struct ndis_pkt_8021q_info)) + /* Format of Information buffer passed in a SetRequest for the OID */ /* OID_GEN_RNDIS_CONFIG_PARAMETER. */ struct rndis_config_parameter_info { diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index 8965b45ce5a5..d025c83cd12a 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -300,6 +300,7 @@ static int negotiate_nvsp_ver(struct hv_device *device, memset(init_packet, 0, sizeof(struct nvsp_message)); init_packet->hdr.msg_type = NVSP_MSG2_TYPE_SEND_NDIS_CONFIG; init_packet->msg.v2_msg.send_ndis_config.mtu = net_device->ndev->mtu; + init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1; ret = vmbus_sendpacket(device->channel, init_packet, sizeof(struct nvsp_message), @@ -341,7 +342,7 @@ static int netvsc_connect_vsp(struct hv_device *device) /* Send the ndis version */ memset(init_packet, 0, sizeof(struct nvsp_message)); - ndis_version = 0x00050000; + ndis_version = 0x00050001; init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER; init_packet->msg.v1_msg. diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 217dfedbba20..0f8e8344891b 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -159,7 +159,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) /* Allocate a netvsc packet based on # of frags. */ packet = kzalloc(sizeof(struct hv_netvsc_packet) + (num_pages * sizeof(struct hv_page_buffer)) + - sizeof(struct rndis_filter_packet), GFP_ATOMIC); + sizeof(struct rndis_filter_packet) + + NDIS_VLAN_PPI_SIZE, GFP_ATOMIC); if (!packet) { /* out of memory, drop packet */ netdev_err(net, "unable to allocate hv_netvsc_packet\n"); @@ -169,6 +170,8 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) return NETDEV_TX_BUSY; } + packet->vlan_tci = skb->vlan_tci; + packet->extension = (void *)(unsigned long)packet + sizeof(struct hv_netvsc_packet) + (num_pages * sizeof(struct hv_page_buffer)); @@ -293,6 +296,7 @@ int netvsc_recv_callback(struct hv_device *device_obj, skb->protocol = eth_type_trans(skb, net); skb->ip_summed = CHECKSUM_NONE; + skb->vlan_tci = packet->vlan_tci; net->stats.rx_packets++; net->stats.rx_bytes += packet->total_data_buflen; @@ -407,7 +411,7 @@ static int netvsc_probe(struct hv_device *dev, /* TODO: Add GSO and Checksum offload */ net->hw_features = NETIF_F_SG; - net->features = NETIF_F_SG; + net->features = NETIF_F_SG | NETIF_F_HW_VLAN_TX; SET_ETHTOOL_OPS(net, ðtool_ops); SET_NETDEV_DEV(net, &dev->device); diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index 0c3d7d9f51d3..d6be64bcefd4 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -26,6 +26,7 @@ #include #include #include +#include #include "hyperv_net.h" @@ -303,12 +304,39 @@ static void rndis_filter_receive_indicate_status(struct rndis_device *dev, } } +/* + * Get the Per-Packet-Info with the specified type + * return NULL if not found. + */ +static inline void *rndis_get_ppi(struct rndis_packet *rpkt, u32 type) +{ + struct rndis_per_packet_info *ppi; + int len; + + if (rpkt->per_pkt_info_offset == 0) + return NULL; + + ppi = (struct rndis_per_packet_info *)((ulong)rpkt + + rpkt->per_pkt_info_offset); + len = rpkt->per_pkt_info_len; + + while (len > 0) { + if (ppi->type == type) + return (void *)((ulong)ppi + ppi->ppi_offset); + len -= ppi->size; + ppi = (struct rndis_per_packet_info *)((ulong)ppi + ppi->size); + } + + return NULL; +} + static void rndis_filter_receive_data(struct rndis_device *dev, struct rndis_message *msg, struct hv_netvsc_packet *pkt) { struct rndis_packet *rndis_pkt; u32 data_offset; + struct ndis_pkt_8021q_info *vlan; rndis_pkt = &msg->msg.pkt; @@ -344,6 +372,14 @@ static void rndis_filter_receive_data(struct rndis_device *dev, pkt->is_data_pkt = true; + vlan = rndis_get_ppi(rndis_pkt, IEEE_8021Q_INFO); + if (vlan) { + pkt->vlan_tci = VLAN_TAG_PRESENT | vlan->vlanid | + (vlan->pri << VLAN_PRIO_SHIFT); + } else { + pkt->vlan_tci = 0; + } + netvsc_recv_callback(dev->net_dev->dev, pkt); } @@ -759,12 +795,15 @@ int rndis_filter_send(struct hv_device *dev, struct rndis_message *rndis_msg; struct rndis_packet *rndis_pkt; u32 rndis_msg_size; + bool isvlan = pkt->vlan_tci & VLAN_TAG_PRESENT; /* Add the rndis header */ filter_pkt = (struct rndis_filter_packet *)pkt->extension; rndis_msg = &filter_pkt->msg; rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); + if (isvlan) + rndis_msg_size += NDIS_VLAN_PPI_SIZE; rndis_msg->ndis_msg_type = REMOTE_NDIS_PACKET_MSG; rndis_msg->msg_len = pkt->total_data_buflen + @@ -772,8 +811,29 @@ int rndis_filter_send(struct hv_device *dev, rndis_pkt = &rndis_msg->msg.pkt; rndis_pkt->data_offset = sizeof(struct rndis_packet); + if (isvlan) + rndis_pkt->data_offset += NDIS_VLAN_PPI_SIZE; rndis_pkt->data_len = pkt->total_data_buflen; + if (isvlan) { + struct rndis_per_packet_info *ppi; + struct ndis_pkt_8021q_info *vlan; + + rndis_pkt->per_pkt_info_offset = sizeof(struct rndis_packet); + rndis_pkt->per_pkt_info_len = NDIS_VLAN_PPI_SIZE; + + ppi = (struct rndis_per_packet_info *)((ulong)rndis_pkt + + rndis_pkt->per_pkt_info_offset); + ppi->size = NDIS_VLAN_PPI_SIZE; + ppi->type = IEEE_8021Q_INFO; + ppi->ppi_offset = sizeof(struct rndis_per_packet_info); + + vlan = (struct ndis_pkt_8021q_info *)((ulong)ppi + + ppi->ppi_offset); + vlan->vlanid = pkt->vlan_tci & VLAN_VID_MASK; + vlan->pri = (pkt->vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + } + pkt->is_data_pkt = true; pkt->page_buf[0].pfn = virt_to_phys(rndis_msg) >> PAGE_SHIFT; pkt->page_buf[0].offset = -- 2.20.1