| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2009, Microsoft Corporation. |
| * |
| * Authors: |
| * Haiyang Zhang <haiyangz@microsoft.com> |
| * Hank Janssen <hjanssen@microsoft.com> |
| */ |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/init.h> |
| #include <linux/atomic.h> |
| #include <linux/module.h> |
| #include <linux/highmem.h> |
| #include <linux/device.h> |
| #include <linux/io.h> |
| #include <linux/delay.h> |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/pci.h> |
| #include <linux/skbuff.h> |
| #include <linux/if_vlan.h> |
| #include <linux/in.h> |
| #include <linux/slab.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/netpoll.h> |
| #include <linux/bpf.h> |
| |
| #include <net/arp.h> |
| #include <net/route.h> |
| #include <net/sock.h> |
| #include <net/pkt_sched.h> |
| #include <net/checksum.h> |
| #include <net/ip6_checksum.h> |
| |
| #include "hyperv_net.h" |
| |
| #define RING_SIZE_MIN 64 |
| #define RETRY_US_LO 5000 |
| #define RETRY_US_HI 10000 |
| #define RETRY_MAX 2000 /* >10 sec */ |
| |
| #define LINKCHANGE_INT (2 * HZ) |
| #define VF_TAKEOVER_INT (HZ / 10) |
| |
| static unsigned int ring_size __ro_after_init = 128; |
| module_param(ring_size, uint, 0444); |
| MODULE_PARM_DESC(ring_size, "Ring buffer size (# of pages)"); |
| unsigned int netvsc_ring_bytes __ro_after_init; |
| |
| static const u32 default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE | |
| NETIF_MSG_LINK | NETIF_MSG_IFUP | |
| NETIF_MSG_IFDOWN | NETIF_MSG_RX_ERR | |
| NETIF_MSG_TX_ERR; |
| |
| static int debug = -1; |
| module_param(debug, int, 0444); |
| MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
| |
| static LIST_HEAD(netvsc_dev_list); |
| |
| static void netvsc_change_rx_flags(struct net_device *net, int change) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
| int inc; |
| |
| if (!vf_netdev) |
| return; |
| |
| if (change & IFF_PROMISC) { |
| inc = (net->flags & IFF_PROMISC) ? 1 : -1; |
| dev_set_promiscuity(vf_netdev, inc); |
| } |
| |
| if (change & IFF_ALLMULTI) { |
| inc = (net->flags & IFF_ALLMULTI) ? 1 : -1; |
| dev_set_allmulti(vf_netdev, inc); |
| } |
| } |
| |
| static void netvsc_set_rx_mode(struct net_device *net) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct net_device *vf_netdev; |
| struct netvsc_device *nvdev; |
| |
| rcu_read_lock(); |
| vf_netdev = rcu_dereference(ndev_ctx->vf_netdev); |
| if (vf_netdev) { |
| dev_uc_sync(vf_netdev, net); |
| dev_mc_sync(vf_netdev, net); |
| } |
| |
| nvdev = rcu_dereference(ndev_ctx->nvdev); |
| if (nvdev) |
| rndis_filter_update(nvdev); |
| rcu_read_unlock(); |
| } |
| |
| static void netvsc_tx_enable(struct netvsc_device *nvscdev, |
| struct net_device *ndev) |
| { |
| nvscdev->tx_disable = false; |
| virt_wmb(); /* ensure queue wake up mechanism is on */ |
| |
| netif_tx_wake_all_queues(ndev); |
| } |
| |
| static int netvsc_open(struct net_device *net) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct net_device *vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndev_ctx->nvdev); |
| struct rndis_device *rdev; |
| int ret = 0; |
| |
| netif_carrier_off(net); |
| |
| /* Open up the device */ |
| ret = rndis_filter_open(nvdev); |
| if (ret != 0) { |
| netdev_err(net, "unable to open device (ret %d).\n", ret); |
| return ret; |
| } |
| |
| rdev = nvdev->extension; |
| if (!rdev->link_state) { |
| netif_carrier_on(net); |
| netvsc_tx_enable(nvdev, net); |
| } |
| |
| if (vf_netdev) { |
| /* Setting synthetic device up transparently sets |
| * slave as up. If open fails, then slave will be |
| * still be offline (and not used). |
| */ |
| ret = dev_open(vf_netdev, NULL); |
| if (ret) |
| netdev_warn(net, |
| "unable to open slave: %s: %d\n", |
| vf_netdev->name, ret); |
| } |
| return 0; |
| } |
| |
| static int netvsc_wait_until_empty(struct netvsc_device *nvdev) |
| { |
| unsigned int retry = 0; |
| int i; |
| |
| /* Ensure pending bytes in ring are read */ |
| for (;;) { |
| u32 aread = 0; |
| |
| for (i = 0; i < nvdev->num_chn; i++) { |
| struct vmbus_channel *chn |
| = nvdev->chan_table[i].channel; |
| |
| if (!chn) |
| continue; |
| |
| /* make sure receive not running now */ |
| napi_synchronize(&nvdev->chan_table[i].napi); |
| |
| aread = hv_get_bytes_to_read(&chn->inbound); |
| if (aread) |
| break; |
| |
| aread = hv_get_bytes_to_read(&chn->outbound); |
| if (aread) |
| break; |
| } |
| |
| if (aread == 0) |
| return 0; |
| |
| if (++retry > RETRY_MAX) |
| return -ETIMEDOUT; |
| |
| usleep_range(RETRY_US_LO, RETRY_US_HI); |
| } |
| } |
| |
| static void netvsc_tx_disable(struct netvsc_device *nvscdev, |
| struct net_device *ndev) |
| { |
| if (nvscdev) { |
| nvscdev->tx_disable = true; |
| virt_wmb(); /* ensure txq will not wake up after stop */ |
| } |
| |
| netif_tx_disable(ndev); |
| } |
| |
| static int netvsc_close(struct net_device *net) |
| { |
| struct net_device_context *net_device_ctx = netdev_priv(net); |
| struct net_device *vf_netdev |
| = rtnl_dereference(net_device_ctx->vf_netdev); |
| struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
| int ret; |
| |
| netvsc_tx_disable(nvdev, net); |
| |
| /* No need to close rndis filter if it is removed already */ |
| if (!nvdev) |
| return 0; |
| |
| ret = rndis_filter_close(nvdev); |
| if (ret != 0) { |
| netdev_err(net, "unable to close device (ret %d).\n", ret); |
| return ret; |
| } |
| |
| ret = netvsc_wait_until_empty(nvdev); |
| if (ret) |
| netdev_err(net, "Ring buffer not empty after closing rndis\n"); |
| |
| if (vf_netdev) |
| dev_close(vf_netdev); |
| |
| return ret; |
| } |
| |
| static inline void *init_ppi_data(struct rndis_message *msg, |
| u32 ppi_size, u32 pkt_type) |
| { |
| struct rndis_packet *rndis_pkt = &msg->msg.pkt; |
| struct rndis_per_packet_info *ppi; |
| |
| rndis_pkt->data_offset += ppi_size; |
| ppi = (void *)rndis_pkt + rndis_pkt->per_pkt_info_offset |
| + rndis_pkt->per_pkt_info_len; |
| |
| ppi->size = ppi_size; |
| ppi->type = pkt_type; |
| ppi->internal = 0; |
| ppi->ppi_offset = sizeof(struct rndis_per_packet_info); |
| |
| rndis_pkt->per_pkt_info_len += ppi_size; |
| |
| return ppi + 1; |
| } |
| |
| /* Azure hosts don't support non-TCP port numbers in hashing for fragmented |
| * packets. We can use ethtool to change UDP hash level when necessary. |
| */ |
| static inline u32 netvsc_get_hash( |
| struct sk_buff *skb, |
| const struct net_device_context *ndc) |
| { |
| struct flow_keys flow; |
| u32 hash, pkt_proto = 0; |
| static u32 hashrnd __read_mostly; |
| |
| net_get_random_once(&hashrnd, sizeof(hashrnd)); |
| |
| if (!skb_flow_dissect_flow_keys(skb, &flow, 0)) |
| return 0; |
| |
| switch (flow.basic.ip_proto) { |
| case IPPROTO_TCP: |
| if (flow.basic.n_proto == htons(ETH_P_IP)) |
| pkt_proto = HV_TCP4_L4HASH; |
| else if (flow.basic.n_proto == htons(ETH_P_IPV6)) |
| pkt_proto = HV_TCP6_L4HASH; |
| |
| break; |
| |
| case IPPROTO_UDP: |
| if (flow.basic.n_proto == htons(ETH_P_IP)) |
| pkt_proto = HV_UDP4_L4HASH; |
| else if (flow.basic.n_proto == htons(ETH_P_IPV6)) |
| pkt_proto = HV_UDP6_L4HASH; |
| |
| break; |
| } |
| |
| if (pkt_proto & ndc->l4_hash) { |
| return skb_get_hash(skb); |
| } else { |
| if (flow.basic.n_proto == htons(ETH_P_IP)) |
| hash = jhash2((u32 *)&flow.addrs.v4addrs, 2, hashrnd); |
| else if (flow.basic.n_proto == htons(ETH_P_IPV6)) |
| hash = jhash2((u32 *)&flow.addrs.v6addrs, 8, hashrnd); |
| else |
| return 0; |
| |
| __skb_set_sw_hash(skb, hash, false); |
| } |
| |
| return hash; |
| } |
| |
| static inline int netvsc_get_tx_queue(struct net_device *ndev, |
| struct sk_buff *skb, int old_idx) |
| { |
| const struct net_device_context *ndc = netdev_priv(ndev); |
| struct sock *sk = skb->sk; |
| int q_idx; |
| |
| q_idx = ndc->tx_table[netvsc_get_hash(skb, ndc) & |
| (VRSS_SEND_TAB_SIZE - 1)]; |
| |
| /* If queue index changed record the new value */ |
| if (q_idx != old_idx && |
| sk && sk_fullsock(sk) && rcu_access_pointer(sk->sk_dst_cache)) |
| sk_tx_queue_set(sk, q_idx); |
| |
| return q_idx; |
| } |
| |
| /* |
| * Select queue for transmit. |
| * |
| * If a valid queue has already been assigned, then use that. |
| * Otherwise compute tx queue based on hash and the send table. |
| * |
| * This is basically similar to default (netdev_pick_tx) with the added step |
| * of using the host send_table when no other queue has been assigned. |
| * |
| * TODO support XPS - but get_xps_queue not exported |
| */ |
| static u16 netvsc_pick_tx(struct net_device *ndev, struct sk_buff *skb) |
| { |
| int q_idx = sk_tx_queue_get(skb->sk); |
| |
| if (q_idx < 0 || skb->ooo_okay || q_idx >= ndev->real_num_tx_queues) { |
| /* If forwarding a packet, we use the recorded queue when |
| * available for better cache locality. |
| */ |
| if (skb_rx_queue_recorded(skb)) |
| q_idx = skb_get_rx_queue(skb); |
| else |
| q_idx = netvsc_get_tx_queue(ndev, skb, q_idx); |
| } |
| |
| return q_idx; |
| } |
| |
| static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, |
| struct net_device *sb_dev) |
| { |
| struct net_device_context *ndc = netdev_priv(ndev); |
| struct net_device *vf_netdev; |
| u16 txq; |
| |
| rcu_read_lock(); |
| vf_netdev = rcu_dereference(ndc->vf_netdev); |
| if (vf_netdev) { |
| const struct net_device_ops *vf_ops = vf_netdev->netdev_ops; |
| |
| if (vf_ops->ndo_select_queue) |
| txq = vf_ops->ndo_select_queue(vf_netdev, skb, sb_dev); |
| else |
| txq = netdev_pick_tx(vf_netdev, skb, NULL); |
| |
| /* Record the queue selected by VF so that it can be |
| * used for common case where VF has more queues than |
| * the synthetic device. |
| */ |
| qdisc_skb_cb(skb)->slave_dev_queue_mapping = txq; |
| } else { |
| txq = netvsc_pick_tx(ndev, skb); |
| } |
| rcu_read_unlock(); |
| |
| while (txq >= ndev->real_num_tx_queues) |
| txq -= ndev->real_num_tx_queues; |
| |
| return txq; |
| } |
| |
| static u32 fill_pg_buf(struct page *page, u32 offset, u32 len, |
| struct hv_page_buffer *pb) |
| { |
| int j = 0; |
| |
| /* Deal with compound pages by ignoring unused part |
| * of the page. |
| */ |
| page += (offset >> PAGE_SHIFT); |
| offset &= ~PAGE_MASK; |
| |
| while (len > 0) { |
| unsigned long bytes; |
| |
| bytes = PAGE_SIZE - offset; |
| if (bytes > len) |
| bytes = len; |
| pb[j].pfn = page_to_pfn(page); |
| pb[j].offset = offset; |
| pb[j].len = bytes; |
| |
| offset += bytes; |
| len -= bytes; |
| |
| if (offset == PAGE_SIZE && len) { |
| page++; |
| offset = 0; |
| j++; |
| } |
| } |
| |
| return j + 1; |
| } |
| |
| static u32 init_page_array(void *hdr, u32 len, struct sk_buff *skb, |
| struct hv_netvsc_packet *packet, |
| struct hv_page_buffer *pb) |
| { |
| u32 slots_used = 0; |
| char *data = skb->data; |
| int frags = skb_shinfo(skb)->nr_frags; |
| int i; |
| |
| /* The packet is laid out thus: |
| * 1. hdr: RNDIS header and PPI |
| * 2. skb linear data |
| * 3. skb fragment data |
| */ |
| slots_used += fill_pg_buf(virt_to_page(hdr), |
| offset_in_page(hdr), |
| len, &pb[slots_used]); |
| |
| packet->rmsg_size = len; |
| packet->rmsg_pgcnt = slots_used; |
| |
| slots_used += fill_pg_buf(virt_to_page(data), |
| offset_in_page(data), |
| skb_headlen(skb), &pb[slots_used]); |
| |
| for (i = 0; i < frags; i++) { |
| skb_frag_t *frag = skb_shinfo(skb)->frags + i; |
| |
| slots_used += fill_pg_buf(skb_frag_page(frag), |
| skb_frag_off(frag), |
| skb_frag_size(frag), &pb[slots_used]); |
| } |
| return slots_used; |
| } |
| |
| static int count_skb_frag_slots(struct sk_buff *skb) |
| { |
| int i, frags = skb_shinfo(skb)->nr_frags; |
| int pages = 0; |
| |
| for (i = 0; i < frags; i++) { |
| skb_frag_t *frag = skb_shinfo(skb)->frags + i; |
| unsigned long size = skb_frag_size(frag); |
| unsigned long offset = skb_frag_off(frag); |
| |
| /* Skip unused frames from start of page */ |
| offset &= ~PAGE_MASK; |
| pages += PFN_UP(offset + size); |
| } |
| return pages; |
| } |
| |
| static int netvsc_get_slots(struct sk_buff *skb) |
| { |
| char *data = skb->data; |
| unsigned int offset = offset_in_page(data); |
| unsigned int len = skb_headlen(skb); |
| int slots; |
| int frag_slots; |
| |
| slots = DIV_ROUND_UP(offset + len, PAGE_SIZE); |
| frag_slots = count_skb_frag_slots(skb); |
| return slots + frag_slots; |
| } |
| |
| static u32 net_checksum_info(struct sk_buff *skb) |
| { |
| if (skb->protocol == htons(ETH_P_IP)) { |
| struct iphdr *ip = ip_hdr(skb); |
| |
| if (ip->protocol == IPPROTO_TCP) |
| return TRANSPORT_INFO_IPV4_TCP; |
| else if (ip->protocol == IPPROTO_UDP) |
| return TRANSPORT_INFO_IPV4_UDP; |
| } else { |
| struct ipv6hdr *ip6 = ipv6_hdr(skb); |
| |
| if (ip6->nexthdr == IPPROTO_TCP) |
| return TRANSPORT_INFO_IPV6_TCP; |
| else if (ip6->nexthdr == IPPROTO_UDP) |
| return TRANSPORT_INFO_IPV6_UDP; |
| } |
| |
| return TRANSPORT_INFO_NOT_IP; |
| } |
| |
| /* Send skb on the slave VF device. */ |
| static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev, |
| struct sk_buff *skb) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| unsigned int len = skb->len; |
| int rc; |
| |
| skb->dev = vf_netdev; |
| skb_record_rx_queue(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping); |
| |
| rc = dev_queue_xmit(skb); |
| if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) { |
| struct netvsc_vf_pcpu_stats *pcpu_stats |
| = this_cpu_ptr(ndev_ctx->vf_stats); |
| |
| u64_stats_update_begin(&pcpu_stats->syncp); |
| pcpu_stats->tx_packets++; |
| pcpu_stats->tx_bytes += len; |
| u64_stats_update_end(&pcpu_stats->syncp); |
| } else { |
| this_cpu_inc(ndev_ctx->vf_stats->tx_dropped); |
| } |
| |
| return rc; |
| } |
| |
| static int netvsc_xmit(struct sk_buff *skb, struct net_device *net, bool xdp_tx) |
| { |
| struct net_device_context *net_device_ctx = netdev_priv(net); |
| struct hv_netvsc_packet *packet = NULL; |
| int ret; |
| unsigned int num_data_pgs; |
| struct rndis_message *rndis_msg; |
| struct net_device *vf_netdev; |
| u32 rndis_msg_size; |
| u32 hash; |
| struct hv_page_buffer pb[MAX_PAGE_BUFFER_COUNT]; |
| |
| /* If VF is present and up then redirect packets to it. |
| * Skip the VF if it is marked down or has no carrier. |
| * If netpoll is in uses, then VF can not be used either. |
| */ |
| vf_netdev = rcu_dereference_bh(net_device_ctx->vf_netdev); |
| if (vf_netdev && netif_running(vf_netdev) && |
| netif_carrier_ok(vf_netdev) && !netpoll_tx_running(net)) |
| return netvsc_vf_xmit(net, vf_netdev, skb); |
| |
| /* We will atmost need two pages to describe the rndis |
| * header. We can only transmit MAX_PAGE_BUFFER_COUNT number |
| * of pages in a single packet. If skb is scattered around |
| * more pages we try linearizing it. |
| */ |
| |
| num_data_pgs = netvsc_get_slots(skb) + 2; |
| |
| if (unlikely(num_data_pgs > MAX_PAGE_BUFFER_COUNT)) { |
| ++net_device_ctx->eth_stats.tx_scattered; |
| |
| if (skb_linearize(skb)) |
| goto no_memory; |
| |
| num_data_pgs = netvsc_get_slots(skb) + 2; |
| if (num_data_pgs > MAX_PAGE_BUFFER_COUNT) { |
| ++net_device_ctx->eth_stats.tx_too_big; |
| goto drop; |
| } |
| } |
| |
| /* |
| * Place the rndis header in the skb head room and |
| * the skb->cb will be used for hv_netvsc_packet |
| * structure. |
| */ |
| ret = skb_cow_head(skb, RNDIS_AND_PPI_SIZE); |
| if (ret) |
| goto no_memory; |
| |
| /* Use the skb control buffer for building up the packet */ |
| BUILD_BUG_ON(sizeof(struct hv_netvsc_packet) > |
| sizeof_field(struct sk_buff, cb)); |
| packet = (struct hv_netvsc_packet *)skb->cb; |
| |
| packet->q_idx = skb_get_queue_mapping(skb); |
| |
| packet->total_data_buflen = skb->len; |
| packet->total_bytes = skb->len; |
| packet->total_packets = 1; |
| |
| rndis_msg = (struct rndis_message *)skb->head; |
| |
| /* Add the rndis header */ |
| rndis_msg->ndis_msg_type = RNDIS_MSG_PACKET; |
| rndis_msg->msg_len = packet->total_data_buflen; |
| |
| rndis_msg->msg.pkt = (struct rndis_packet) { |
| .data_offset = sizeof(struct rndis_packet), |
| .data_len = packet->total_data_buflen, |
| .per_pkt_info_offset = sizeof(struct rndis_packet), |
| }; |
| |
| rndis_msg_size = RNDIS_MESSAGE_SIZE(struct rndis_packet); |
| |
| hash = skb_get_hash_raw(skb); |
| if (hash != 0 && net->real_num_tx_queues > 1) { |
| u32 *hash_info; |
| |
| rndis_msg_size += NDIS_HASH_PPI_SIZE; |
| hash_info = init_ppi_data(rndis_msg, NDIS_HASH_PPI_SIZE, |
| NBL_HASH_VALUE); |
| *hash_info = hash; |
| } |
| |
| /* When using AF_PACKET we need to drop VLAN header from |
| * the frame and update the SKB to allow the HOST OS |
| * to transmit the 802.1Q packet |
| */ |
| if (skb->protocol == htons(ETH_P_8021Q)) { |
| u16 vlan_tci; |
| |
| skb_reset_mac_header(skb); |
| if (eth_type_vlan(eth_hdr(skb)->h_proto)) { |
| if (unlikely(__skb_vlan_pop(skb, &vlan_tci) != 0)) { |
| ++net_device_ctx->eth_stats.vlan_error; |
| goto drop; |
| } |
| |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); |
| /* Update the NDIS header pkt lengths */ |
| packet->total_data_buflen -= VLAN_HLEN; |
| packet->total_bytes -= VLAN_HLEN; |
| rndis_msg->msg_len = packet->total_data_buflen; |
| rndis_msg->msg.pkt.data_len = packet->total_data_buflen; |
| } |
| } |
| |
| if (skb_vlan_tag_present(skb)) { |
| struct ndis_pkt_8021q_info *vlan; |
| |
| rndis_msg_size += NDIS_VLAN_PPI_SIZE; |
| vlan = init_ppi_data(rndis_msg, NDIS_VLAN_PPI_SIZE, |
| IEEE_8021Q_INFO); |
| |
| vlan->value = 0; |
| vlan->vlanid = skb_vlan_tag_get_id(skb); |
| vlan->cfi = skb_vlan_tag_get_cfi(skb); |
| vlan->pri = skb_vlan_tag_get_prio(skb); |
| } |
| |
| if (skb_is_gso(skb)) { |
| struct ndis_tcp_lso_info *lso_info; |
| |
| rndis_msg_size += NDIS_LSO_PPI_SIZE; |
| lso_info = init_ppi_data(rndis_msg, NDIS_LSO_PPI_SIZE, |
| TCP_LARGESEND_PKTINFO); |
| |
| lso_info->value = 0; |
| lso_info->lso_v2_transmit.type = NDIS_TCP_LARGE_SEND_OFFLOAD_V2_TYPE; |
| if (skb->protocol == htons(ETH_P_IP)) { |
| lso_info->lso_v2_transmit.ip_version = |
| NDIS_TCP_LARGE_SEND_OFFLOAD_IPV4; |
| ip_hdr(skb)->tot_len = 0; |
| ip_hdr(skb)->check = 0; |
| tcp_hdr(skb)->check = |
| ~csum_tcpudp_magic(ip_hdr(skb)->saddr, |
| ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); |
| } else { |
| lso_info->lso_v2_transmit.ip_version = |
| NDIS_TCP_LARGE_SEND_OFFLOAD_IPV6; |
| tcp_v6_gso_csum_prep(skb); |
| } |
| lso_info->lso_v2_transmit.tcp_header_offset = skb_transport_offset(skb); |
| lso_info->lso_v2_transmit.mss = skb_shinfo(skb)->gso_size; |
| } else if (skb->ip_summed == CHECKSUM_PARTIAL) { |
| if (net_checksum_info(skb) & net_device_ctx->tx_checksum_mask) { |
| struct ndis_tcp_ip_checksum_info *csum_info; |
| |
| rndis_msg_size += NDIS_CSUM_PPI_SIZE; |
| csum_info = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, |
| TCPIP_CHKSUM_PKTINFO); |
| |
| csum_info->value = 0; |
| csum_info->transmit.tcp_header_offset = skb_transport_offset(skb); |
| |
| if (skb->protocol == htons(ETH_P_IP)) { |
| csum_info->transmit.is_ipv4 = 1; |
| |
| if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
| csum_info->transmit.tcp_checksum = 1; |
| else |
| csum_info->transmit.udp_checksum = 1; |
| } else { |
| csum_info->transmit.is_ipv6 = 1; |
| |
| if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
| csum_info->transmit.tcp_checksum = 1; |
| else |
| csum_info->transmit.udp_checksum = 1; |
| } |
| } else { |
| /* Can't do offload of this type of checksum */ |
| if (skb_checksum_help(skb)) |
| goto drop; |
| } |
| } |
| |
| /* Start filling in the page buffers with the rndis hdr */ |
| rndis_msg->msg_len += rndis_msg_size; |
| packet->total_data_buflen = rndis_msg->msg_len; |
| packet->page_buf_cnt = init_page_array(rndis_msg, rndis_msg_size, |
| skb, packet, pb); |
| |
| /* timestamp packet in software */ |
| skb_tx_timestamp(skb); |
| |
| ret = netvsc_send(net, packet, rndis_msg, pb, skb, xdp_tx); |
| if (likely(ret == 0)) |
| return NETDEV_TX_OK; |
| |
| if (ret == -EAGAIN) { |
| ++net_device_ctx->eth_stats.tx_busy; |
| return NETDEV_TX_BUSY; |
| } |
| |
| if (ret == -ENOSPC) |
| ++net_device_ctx->eth_stats.tx_no_space; |
| |
| drop: |
| dev_kfree_skb_any(skb); |
| net->stats.tx_dropped++; |
| |
| return NETDEV_TX_OK; |
| |
| no_memory: |
| ++net_device_ctx->eth_stats.tx_no_memory; |
| goto drop; |
| } |
| |
| static netdev_tx_t netvsc_start_xmit(struct sk_buff *skb, |
| struct net_device *ndev) |
| { |
| return netvsc_xmit(skb, ndev, false); |
| } |
| |
| /* |
| * netvsc_linkstatus_callback - Link up/down notification |
| */ |
| void netvsc_linkstatus_callback(struct net_device *net, |
| struct rndis_message *resp) |
| { |
| struct rndis_indicate_status *indicate = &resp->msg.indicate_status; |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct netvsc_reconfig *event; |
| unsigned long flags; |
| |
| /* Update the physical link speed when changing to another vSwitch */ |
| if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) { |
| u32 speed; |
| |
| speed = *(u32 *)((void *)indicate |
| + indicate->status_buf_offset) / 10000; |
| ndev_ctx->speed = speed; |
| return; |
| } |
| |
| /* Handle these link change statuses below */ |
| if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE && |
| indicate->status != RNDIS_STATUS_MEDIA_CONNECT && |
| indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT) |
| return; |
| |
| if (net->reg_state != NETREG_REGISTERED) |
| return; |
| |
| event = kzalloc(sizeof(*event), GFP_ATOMIC); |
| if (!event) |
| return; |
| event->event = indicate->status; |
| |
| spin_lock_irqsave(&ndev_ctx->lock, flags); |
| list_add_tail(&event->list, &ndev_ctx->reconfig_events); |
| spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| |
| schedule_delayed_work(&ndev_ctx->dwork, 0); |
| } |
| |
| static void netvsc_xdp_xmit(struct sk_buff *skb, struct net_device *ndev) |
| { |
| int rc; |
| |
| skb->queue_mapping = skb_get_rx_queue(skb); |
| __skb_push(skb, ETH_HLEN); |
| |
| rc = netvsc_xmit(skb, ndev, true); |
| |
| if (dev_xmit_complete(rc)) |
| return; |
| |
| dev_kfree_skb_any(skb); |
| ndev->stats.tx_dropped++; |
| } |
| |
| static void netvsc_comp_ipcsum(struct sk_buff *skb) |
| { |
| struct iphdr *iph = (struct iphdr *)skb->data; |
| |
| iph->check = 0; |
| iph->check = ip_fast_csum(iph, iph->ihl); |
| } |
| |
| static struct sk_buff *netvsc_alloc_recv_skb(struct net_device *net, |
| struct netvsc_channel *nvchan, |
| struct xdp_buff *xdp) |
| { |
| struct napi_struct *napi = &nvchan->napi; |
| const struct ndis_pkt_8021q_info *vlan = nvchan->rsc.vlan; |
| const struct ndis_tcp_ip_checksum_info *csum_info = |
| nvchan->rsc.csum_info; |
| const u32 *hash_info = nvchan->rsc.hash_info; |
| struct sk_buff *skb; |
| void *xbuf = xdp->data_hard_start; |
| int i; |
| |
| if (xbuf) { |
| unsigned int hdroom = xdp->data - xdp->data_hard_start; |
| unsigned int xlen = xdp->data_end - xdp->data; |
| unsigned int frag_size = xdp->frame_sz; |
| |
| skb = build_skb(xbuf, frag_size); |
| |
| if (!skb) { |
| __free_page(virt_to_page(xbuf)); |
| return NULL; |
| } |
| |
| skb_reserve(skb, hdroom); |
| skb_put(skb, xlen); |
| skb->dev = napi->dev; |
| } else { |
| skb = napi_alloc_skb(napi, nvchan->rsc.pktlen); |
| |
| if (!skb) |
| return NULL; |
| |
| /* Copy to skb. This copy is needed here since the memory |
| * pointed by hv_netvsc_packet cannot be deallocated. |
| */ |
| for (i = 0; i < nvchan->rsc.cnt; i++) |
| skb_put_data(skb, nvchan->rsc.data[i], |
| nvchan->rsc.len[i]); |
| } |
| |
| skb->protocol = eth_type_trans(skb, net); |
| |
| /* skb is already created with CHECKSUM_NONE */ |
| skb_checksum_none_assert(skb); |
| |
| /* Incoming packets may have IP header checksum verified by the host. |
| * They may not have IP header checksum computed after coalescing. |
| * We compute it here if the flags are set, because on Linux, the IP |
| * checksum is always checked. |
| */ |
| if (csum_info && csum_info->receive.ip_checksum_value_invalid && |
| csum_info->receive.ip_checksum_succeeded && |
| skb->protocol == htons(ETH_P_IP)) |
| netvsc_comp_ipcsum(skb); |
| |
| /* Do L4 checksum offload if enabled and present. */ |
| if (csum_info && (net->features & NETIF_F_RXCSUM)) { |
| if (csum_info->receive.tcp_checksum_succeeded || |
| csum_info->receive.udp_checksum_succeeded) |
| skb->ip_summed = CHECKSUM_UNNECESSARY; |
| } |
| |
| if (hash_info && (net->features & NETIF_F_RXHASH)) |
| skb_set_hash(skb, *hash_info, PKT_HASH_TYPE_L4); |
| |
| if (vlan) { |
| u16 vlan_tci = vlan->vlanid | (vlan->pri << VLAN_PRIO_SHIFT) | |
| (vlan->cfi ? VLAN_CFI_MASK : 0); |
| |
| __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), |
| vlan_tci); |
| } |
| |
| return skb; |
| } |
| |
| /* |
| * 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 netvsc_device *net_device, |
| struct netvsc_channel *nvchan) |
| { |
| struct net_device_context *net_device_ctx = netdev_priv(net); |
| struct vmbus_channel *channel = nvchan->channel; |
| u16 q_idx = channel->offermsg.offer.sub_channel_index; |
| struct sk_buff *skb; |
| struct netvsc_stats *rx_stats = &nvchan->rx_stats; |
| struct xdp_buff xdp; |
| u32 act; |
| |
| if (net->reg_state != NETREG_REGISTERED) |
| return NVSP_STAT_FAIL; |
| |
| act = netvsc_run_xdp(net, nvchan, &xdp); |
| |
| if (act != XDP_PASS && act != XDP_TX) { |
| u64_stats_update_begin(&rx_stats->syncp); |
| rx_stats->xdp_drop++; |
| u64_stats_update_end(&rx_stats->syncp); |
| |
| return NVSP_STAT_SUCCESS; /* consumed by XDP */ |
| } |
| |
| /* Allocate a skb - TODO direct I/O to pages? */ |
| skb = netvsc_alloc_recv_skb(net, nvchan, &xdp); |
| |
| if (unlikely(!skb)) { |
| ++net_device_ctx->eth_stats.rx_no_memory; |
| return NVSP_STAT_FAIL; |
| } |
| |
| 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. |
| */ |
| u64_stats_update_begin(&rx_stats->syncp); |
| rx_stats->packets++; |
| rx_stats->bytes += nvchan->rsc.pktlen; |
| |
| 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); |
| |
| if (act == XDP_TX) { |
| netvsc_xdp_xmit(skb, net); |
| return NVSP_STAT_SUCCESS; |
| } |
| |
| napi_gro_receive(&nvchan->napi, skb); |
| return NVSP_STAT_SUCCESS; |
| } |
| |
| static void netvsc_get_drvinfo(struct net_device *net, |
| struct ethtool_drvinfo *info) |
| { |
| strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver)); |
| strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
| } |
| |
| static void netvsc_get_channels(struct net_device *net, |
| struct ethtool_channels *channel) |
| { |
| struct net_device_context *net_device_ctx = netdev_priv(net); |
| struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
| |
| if (nvdev) { |
| channel->max_combined = nvdev->max_chn; |
| channel->combined_count = nvdev->num_chn; |
| } |
| } |
| |
| /* Alloc struct netvsc_device_info, and initialize it from either existing |
| * struct netvsc_device, or from default values. |
| */ |
| static |
| struct netvsc_device_info *netvsc_devinfo_get(struct netvsc_device *nvdev) |
| { |
| struct netvsc_device_info *dev_info; |
| struct bpf_prog *prog; |
| |
| dev_info = kzalloc(sizeof(*dev_info), GFP_ATOMIC); |
| |
| if (!dev_info) |
| return NULL; |
| |
| if (nvdev) { |
| ASSERT_RTNL(); |
| |
| dev_info->num_chn = nvdev->num_chn; |
| dev_info->send_sections = nvdev->send_section_cnt; |
| dev_info->send_section_size = nvdev->send_section_size; |
| dev_info->recv_sections = nvdev->recv_section_cnt; |
| dev_info->recv_section_size = nvdev->recv_section_size; |
| |
| memcpy(dev_info->rss_key, nvdev->extension->rss_key, |
| NETVSC_HASH_KEYLEN); |
| |
| prog = netvsc_xdp_get(nvdev); |
| if (prog) { |
| bpf_prog_inc(prog); |
| dev_info->bprog = prog; |
| } |
| } else { |
| dev_info->num_chn = VRSS_CHANNEL_DEFAULT; |
| dev_info->send_sections = NETVSC_DEFAULT_TX; |
| dev_info->send_section_size = NETVSC_SEND_SECTION_SIZE; |
| dev_info->recv_sections = NETVSC_DEFAULT_RX; |
| dev_info->recv_section_size = NETVSC_RECV_SECTION_SIZE; |
| } |
| |
| return dev_info; |
| } |
| |
| /* Free struct netvsc_device_info */ |
| static void netvsc_devinfo_put(struct netvsc_device_info *dev_info) |
| { |
| if (dev_info->bprog) { |
| ASSERT_RTNL(); |
| bpf_prog_put(dev_info->bprog); |
| } |
| |
| kfree(dev_info); |
| } |
| |
| static int netvsc_detach(struct net_device *ndev, |
| struct netvsc_device *nvdev) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| struct hv_device *hdev = ndev_ctx->device_ctx; |
| int ret; |
| |
| /* Don't try continuing to try and setup sub channels */ |
| if (cancel_work_sync(&nvdev->subchan_work)) |
| nvdev->num_chn = 1; |
| |
| netvsc_xdp_set(ndev, NULL, NULL, nvdev); |
| |
| /* If device was up (receiving) then shutdown */ |
| if (netif_running(ndev)) { |
| netvsc_tx_disable(nvdev, ndev); |
| |
| ret = rndis_filter_close(nvdev); |
| if (ret) { |
| netdev_err(ndev, |
| "unable to close device (ret %d).\n", ret); |
| return ret; |
| } |
| |
| ret = netvsc_wait_until_empty(nvdev); |
| if (ret) { |
| netdev_err(ndev, |
| "Ring buffer not empty after closing rndis\n"); |
| return ret; |
| } |
| } |
| |
| netif_device_detach(ndev); |
| |
| rndis_filter_device_remove(hdev, nvdev); |
| |
| return 0; |
| } |
| |
| static int netvsc_attach(struct net_device *ndev, |
| struct netvsc_device_info *dev_info) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| struct hv_device *hdev = ndev_ctx->device_ctx; |
| struct netvsc_device *nvdev; |
| struct rndis_device *rdev; |
| struct bpf_prog *prog; |
| int ret = 0; |
| |
| nvdev = rndis_filter_device_add(hdev, dev_info); |
| if (IS_ERR(nvdev)) |
| return PTR_ERR(nvdev); |
| |
| if (nvdev->num_chn > 1) { |
| ret = rndis_set_subchannel(ndev, nvdev, dev_info); |
| |
| /* if unavailable, just proceed with one queue */ |
| if (ret) { |
| nvdev->max_chn = 1; |
| nvdev->num_chn = 1; |
| } |
| } |
| |
| prog = dev_info->bprog; |
| if (prog) { |
| bpf_prog_inc(prog); |
| ret = netvsc_xdp_set(ndev, prog, NULL, nvdev); |
| if (ret) { |
| bpf_prog_put(prog); |
| goto err1; |
| } |
| } |
| |
| /* In any case device is now ready */ |
| nvdev->tx_disable = false; |
| netif_device_attach(ndev); |
| |
| /* Note: enable and attach happen when sub-channels setup */ |
| netif_carrier_off(ndev); |
| |
| if (netif_running(ndev)) { |
| ret = rndis_filter_open(nvdev); |
| if (ret) |
| goto err2; |
| |
| rdev = nvdev->extension; |
| if (!rdev->link_state) |
| netif_carrier_on(ndev); |
| } |
| |
| return 0; |
| |
| err2: |
| netif_device_detach(ndev); |
| |
| err1: |
| rndis_filter_device_remove(hdev, nvdev); |
| |
| return ret; |
| } |
| |
| static int netvsc_set_channels(struct net_device *net, |
| struct ethtool_channels *channels) |
| { |
| struct net_device_context *net_device_ctx = netdev_priv(net); |
| struct netvsc_device *nvdev = rtnl_dereference(net_device_ctx->nvdev); |
| unsigned int orig, count = channels->combined_count; |
| struct netvsc_device_info *device_info; |
| int ret; |
| |
| /* We do not support separate count for rx, tx, or other */ |
| if (count == 0 || |
| channels->rx_count || channels->tx_count || channels->other_count) |
| return -EINVAL; |
| |
| if (!nvdev || nvdev->destroy) |
| return -ENODEV; |
| |
| if (nvdev->nvsp_version < NVSP_PROTOCOL_VERSION_5) |
| return -EINVAL; |
| |
| if (count > nvdev->max_chn) |
| return -EINVAL; |
| |
| orig = nvdev->num_chn; |
| |
| device_info = netvsc_devinfo_get(nvdev); |
| |
| if (!device_info) |
| return -ENOMEM; |
| |
| device_info->num_chn = count; |
| |
| ret = netvsc_detach(net, nvdev); |
| if (ret) |
| goto out; |
| |
| ret = netvsc_attach(net, device_info); |
| if (ret) { |
| device_info->num_chn = orig; |
| if (netvsc_attach(net, device_info)) |
| netdev_err(net, "restoring channel setting failed\n"); |
| } |
| |
| out: |
| netvsc_devinfo_put(device_info); |
| return ret; |
| } |
| |
| static void netvsc_init_settings(struct net_device *dev) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| |
| ndc->l4_hash = HV_DEFAULT_L4HASH; |
| |
| ndc->speed = SPEED_UNKNOWN; |
| ndc->duplex = DUPLEX_FULL; |
| |
| dev->features = NETIF_F_LRO; |
| } |
| |
| static int netvsc_get_link_ksettings(struct net_device *dev, |
| struct ethtool_link_ksettings *cmd) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct net_device *vf_netdev; |
| |
| vf_netdev = rtnl_dereference(ndc->vf_netdev); |
| |
| if (vf_netdev) |
| return __ethtool_get_link_ksettings(vf_netdev, cmd); |
| |
| cmd->base.speed = ndc->speed; |
| cmd->base.duplex = ndc->duplex; |
| cmd->base.port = PORT_OTHER; |
| |
| return 0; |
| } |
| |
| static int netvsc_set_link_ksettings(struct net_device *dev, |
| const struct ethtool_link_ksettings *cmd) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev); |
| |
| if (vf_netdev) { |
| if (!vf_netdev->ethtool_ops->set_link_ksettings) |
| return -EOPNOTSUPP; |
| |
| return vf_netdev->ethtool_ops->set_link_ksettings(vf_netdev, |
| cmd); |
| } |
| |
| return ethtool_virtdev_set_link_ksettings(dev, cmd, |
| &ndc->speed, &ndc->duplex); |
| } |
| |
| static int netvsc_change_mtu(struct net_device *ndev, int mtu) |
| { |
| struct net_device_context *ndevctx = netdev_priv(ndev); |
| struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
| int orig_mtu = ndev->mtu; |
| struct netvsc_device_info *device_info; |
| int ret = 0; |
| |
| if (!nvdev || nvdev->destroy) |
| return -ENODEV; |
| |
| device_info = netvsc_devinfo_get(nvdev); |
| |
| if (!device_info) |
| return -ENOMEM; |
| |
| /* Change MTU of underlying VF netdev first. */ |
| if (vf_netdev) { |
| ret = dev_set_mtu(vf_netdev, mtu); |
| if (ret) |
| goto out; |
| } |
| |
| ret = netvsc_detach(ndev, nvdev); |
| if (ret) |
| goto rollback_vf; |
| |
| ndev->mtu = mtu; |
| |
| ret = netvsc_attach(ndev, device_info); |
| if (!ret) |
| goto out; |
| |
| /* Attempt rollback to original MTU */ |
| ndev->mtu = orig_mtu; |
| |
| if (netvsc_attach(ndev, device_info)) |
| netdev_err(ndev, "restoring mtu failed\n"); |
| rollback_vf: |
| if (vf_netdev) |
| dev_set_mtu(vf_netdev, orig_mtu); |
| |
| out: |
| netvsc_devinfo_put(device_info); |
| return ret; |
| } |
| |
| static void netvsc_get_vf_stats(struct net_device *net, |
| struct netvsc_vf_pcpu_stats *tot) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| int i; |
| |
| memset(tot, 0, sizeof(*tot)); |
| |
| for_each_possible_cpu(i) { |
| const struct netvsc_vf_pcpu_stats *stats |
| = per_cpu_ptr(ndev_ctx->vf_stats, i); |
| u64 rx_packets, rx_bytes, tx_packets, tx_bytes; |
| unsigned int start; |
| |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| rx_packets = stats->rx_packets; |
| tx_packets = stats->tx_packets; |
| rx_bytes = stats->rx_bytes; |
| tx_bytes = stats->tx_bytes; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| |
| tot->rx_packets += rx_packets; |
| tot->tx_packets += tx_packets; |
| tot->rx_bytes += rx_bytes; |
| tot->tx_bytes += tx_bytes; |
| tot->tx_dropped += stats->tx_dropped; |
| } |
| } |
| |
| static void netvsc_get_pcpu_stats(struct net_device *net, |
| struct netvsc_ethtool_pcpu_stats *pcpu_tot) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev); |
| int i; |
| |
| /* fetch percpu stats of vf */ |
| for_each_possible_cpu(i) { |
| const struct netvsc_vf_pcpu_stats *stats = |
| per_cpu_ptr(ndev_ctx->vf_stats, i); |
| struct netvsc_ethtool_pcpu_stats *this_tot = &pcpu_tot[i]; |
| unsigned int start; |
| |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| this_tot->vf_rx_packets = stats->rx_packets; |
| this_tot->vf_tx_packets = stats->tx_packets; |
| this_tot->vf_rx_bytes = stats->rx_bytes; |
| this_tot->vf_tx_bytes = stats->tx_bytes; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| this_tot->rx_packets = this_tot->vf_rx_packets; |
| this_tot->tx_packets = this_tot->vf_tx_packets; |
| this_tot->rx_bytes = this_tot->vf_rx_bytes; |
| this_tot->tx_bytes = this_tot->vf_tx_bytes; |
| } |
| |
| /* fetch percpu stats of netvsc */ |
| for (i = 0; i < nvdev->num_chn; i++) { |
| const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; |
| const struct netvsc_stats *stats; |
| struct netvsc_ethtool_pcpu_stats *this_tot = |
| &pcpu_tot[nvchan->channel->target_cpu]; |
| u64 packets, bytes; |
| unsigned int start; |
| |
| stats = &nvchan->tx_stats; |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| packets = stats->packets; |
| bytes = stats->bytes; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| |
| this_tot->tx_bytes += bytes; |
| this_tot->tx_packets += packets; |
| |
| stats = &nvchan->rx_stats; |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| packets = stats->packets; |
| bytes = stats->bytes; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| |
| this_tot->rx_bytes += bytes; |
| this_tot->rx_packets += packets; |
| } |
| } |
| |
| static void netvsc_get_stats64(struct net_device *net, |
| struct rtnl_link_stats64 *t) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(net); |
| struct netvsc_device *nvdev; |
| struct netvsc_vf_pcpu_stats vf_tot; |
| int i; |
| |
| rcu_read_lock(); |
| |
| nvdev = rcu_dereference(ndev_ctx->nvdev); |
| if (!nvdev) |
| goto out; |
| |
| netdev_stats_to_stats64(t, &net->stats); |
| |
| netvsc_get_vf_stats(net, &vf_tot); |
| t->rx_packets += vf_tot.rx_packets; |
| t->tx_packets += vf_tot.tx_packets; |
| t->rx_bytes += vf_tot.rx_bytes; |
| t->tx_bytes += vf_tot.tx_bytes; |
| t->tx_dropped += vf_tot.tx_dropped; |
| |
| for (i = 0; i < nvdev->num_chn; i++) { |
| const struct netvsc_channel *nvchan = &nvdev->chan_table[i]; |
| const struct netvsc_stats *stats; |
| u64 packets, bytes, multicast; |
| unsigned int start; |
| |
| stats = &nvchan->tx_stats; |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| packets = stats->packets; |
| bytes = stats->bytes; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| |
| t->tx_bytes += bytes; |
| t->tx_packets += packets; |
| |
| stats = &nvchan->rx_stats; |
| do { |
| start = u64_stats_fetch_begin_irq(&stats->syncp); |
| packets = stats->packets; |
| bytes = stats->bytes; |
| multicast = stats->multicast + stats->broadcast; |
| } while (u64_stats_fetch_retry_irq(&stats->syncp, start)); |
| |
| t->rx_bytes += bytes; |
| t->rx_packets += packets; |
| t->multicast += multicast; |
| } |
| out: |
| rcu_read_unlock(); |
| } |
| |
| static int netvsc_set_mac_addr(struct net_device *ndev, void *p) |
| { |
| struct net_device_context *ndc = netdev_priv(ndev); |
| struct net_device *vf_netdev = rtnl_dereference(ndc->vf_netdev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
| struct sockaddr *addr = p; |
| int err; |
| |
| err = eth_prepare_mac_addr_change(ndev, p); |
| if (err) |
| return err; |
| |
| if (!nvdev) |
| return -ENODEV; |
| |
| if (vf_netdev) { |
| err = dev_set_mac_address(vf_netdev, addr, NULL); |
| if (err) |
| return err; |
| } |
| |
| err = rndis_filter_set_device_mac(nvdev, addr->sa_data); |
| if (!err) { |
| eth_commit_mac_addr_change(ndev, p); |
| } else if (vf_netdev) { |
| /* rollback change on VF */ |
| memcpy(addr->sa_data, ndev->dev_addr, ETH_ALEN); |
| dev_set_mac_address(vf_netdev, addr, NULL); |
| } |
| |
| return err; |
| } |
| |
| static const struct { |
| char name[ETH_GSTRING_LEN]; |
| u16 offset; |
| } netvsc_stats[] = { |
| { "tx_scattered", offsetof(struct netvsc_ethtool_stats, tx_scattered) }, |
| { "tx_no_memory", offsetof(struct netvsc_ethtool_stats, tx_no_memory) }, |
| { "tx_no_space", offsetof(struct netvsc_ethtool_stats, tx_no_space) }, |
| { "tx_too_big", offsetof(struct netvsc_ethtool_stats, tx_too_big) }, |
| { "tx_busy", offsetof(struct netvsc_ethtool_stats, tx_busy) }, |
| { "tx_send_full", offsetof(struct netvsc_ethtool_stats, tx_send_full) }, |
| { "rx_comp_busy", offsetof(struct netvsc_ethtool_stats, rx_comp_busy) }, |
| { "rx_no_memory", offsetof(struct netvsc_ethtool_stats, rx_no_memory) }, |
| { "stop_queue", offsetof(struct netvsc_ethtool_stats, stop_queue) }, |
| { "wake_queue", offsetof(struct netvsc_ethtool_stats, wake_queue) }, |
| { "vlan_error", offsetof(struct netvsc_ethtool_stats, vlan_error) }, |
| }, pcpu_stats[] = { |
| { "cpu%u_rx_packets", |
| offsetof(struct netvsc_ethtool_pcpu_stats, rx_packets) }, |
| { "cpu%u_rx_bytes", |
| offsetof(struct netvsc_ethtool_pcpu_stats, rx_bytes) }, |
| { "cpu%u_tx_packets", |
| offsetof(struct netvsc_ethtool_pcpu_stats, tx_packets) }, |
| { "cpu%u_tx_bytes", |
| offsetof(struct netvsc_ethtool_pcpu_stats, tx_bytes) }, |
| { "cpu%u_vf_rx_packets", |
| offsetof(struct netvsc_ethtool_pcpu_stats, vf_rx_packets) }, |
| { "cpu%u_vf_rx_bytes", |
| offsetof(struct netvsc_ethtool_pcpu_stats, vf_rx_bytes) }, |
| { "cpu%u_vf_tx_packets", |
| offsetof(struct netvsc_ethtool_pcpu_stats, vf_tx_packets) }, |
| { "cpu%u_vf_tx_bytes", |
| offsetof(struct netvsc_ethtool_pcpu_stats, vf_tx_bytes) }, |
| }, vf_stats[] = { |
| { "vf_rx_packets", offsetof(struct netvsc_vf_pcpu_stats, rx_packets) }, |
| { "vf_rx_bytes", offsetof(struct netvsc_vf_pcpu_stats, rx_bytes) }, |
| { "vf_tx_packets", offsetof(struct netvsc_vf_pcpu_stats, tx_packets) }, |
| { "vf_tx_bytes", offsetof(struct netvsc_vf_pcpu_stats, tx_bytes) }, |
| { "vf_tx_dropped", offsetof(struct netvsc_vf_pcpu_stats, tx_dropped) }, |
| }; |
| |
| #define NETVSC_GLOBAL_STATS_LEN ARRAY_SIZE(netvsc_stats) |
| #define NETVSC_VF_STATS_LEN ARRAY_SIZE(vf_stats) |
| |
| /* statistics per queue (rx/tx packets/bytes) */ |
| #define NETVSC_PCPU_STATS_LEN (num_present_cpus() * ARRAY_SIZE(pcpu_stats)) |
| |
| /* 5 statistics per queue (rx/tx packets/bytes, rx xdp_drop) */ |
| #define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 5) |
| |
| static int netvsc_get_sset_count(struct net_device *dev, int string_set) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
| |
| if (!nvdev) |
| return -ENODEV; |
| |
| switch (string_set) { |
| case ETH_SS_STATS: |
| return NETVSC_GLOBAL_STATS_LEN |
| + NETVSC_VF_STATS_LEN |
| + NETVSC_QUEUE_STATS_LEN(nvdev) |
| + NETVSC_PCPU_STATS_LEN; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static void netvsc_get_ethtool_stats(struct net_device *dev, |
| struct ethtool_stats *stats, u64 *data) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
| const void *nds = &ndc->eth_stats; |
| const struct netvsc_stats *qstats; |
| struct netvsc_vf_pcpu_stats sum; |
| struct netvsc_ethtool_pcpu_stats *pcpu_sum; |
| unsigned int start; |
| u64 packets, bytes; |
| u64 xdp_drop; |
| int i, j, cpu; |
| |
| if (!nvdev) |
| return; |
| |
| for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++) |
| data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset); |
| |
| netvsc_get_vf_stats(dev, &sum); |
| for (j = 0; j < NETVSC_VF_STATS_LEN; j++) |
| data[i++] = *(u64 *)((void *)&sum + vf_stats[j].offset); |
| |
| for (j = 0; j < nvdev->num_chn; j++) { |
| qstats = &nvdev->chan_table[j].tx_stats; |
| |
| do { |
| start = u64_stats_fetch_begin_irq(&qstats->syncp); |
| packets = qstats->packets; |
| bytes = qstats->bytes; |
| } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); |
| data[i++] = packets; |
| data[i++] = bytes; |
| |
| qstats = &nvdev->chan_table[j].rx_stats; |
| do { |
| start = u64_stats_fetch_begin_irq(&qstats->syncp); |
| packets = qstats->packets; |
| bytes = qstats->bytes; |
| xdp_drop = qstats->xdp_drop; |
| } while (u64_stats_fetch_retry_irq(&qstats->syncp, start)); |
| data[i++] = packets; |
| data[i++] = bytes; |
| data[i++] = xdp_drop; |
| } |
| |
| pcpu_sum = kvmalloc_array(num_possible_cpus(), |
| sizeof(struct netvsc_ethtool_pcpu_stats), |
| GFP_KERNEL); |
| netvsc_get_pcpu_stats(dev, pcpu_sum); |
| for_each_present_cpu(cpu) { |
| struct netvsc_ethtool_pcpu_stats *this_sum = &pcpu_sum[cpu]; |
| |
| for (j = 0; j < ARRAY_SIZE(pcpu_stats); j++) |
| data[i++] = *(u64 *)((void *)this_sum |
| + pcpu_stats[j].offset); |
| } |
| kvfree(pcpu_sum); |
| } |
| |
| static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
| u8 *p = data; |
| int i, cpu; |
| |
| if (!nvdev) |
| return; |
| |
| switch (stringset) { |
| case ETH_SS_STATS: |
| for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++) { |
| memcpy(p, netvsc_stats[i].name, ETH_GSTRING_LEN); |
| p += ETH_GSTRING_LEN; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(vf_stats); i++) { |
| memcpy(p, vf_stats[i].name, ETH_GSTRING_LEN); |
| p += ETH_GSTRING_LEN; |
| } |
| |
| for (i = 0; i < nvdev->num_chn; i++) { |
| sprintf(p, "tx_queue_%u_packets", i); |
| p += ETH_GSTRING_LEN; |
| sprintf(p, "tx_queue_%u_bytes", i); |
| p += ETH_GSTRING_LEN; |
| sprintf(p, "rx_queue_%u_packets", i); |
| p += ETH_GSTRING_LEN; |
| sprintf(p, "rx_queue_%u_bytes", i); |
| p += ETH_GSTRING_LEN; |
| sprintf(p, "rx_queue_%u_xdp_drop", i); |
| p += ETH_GSTRING_LEN; |
| } |
| |
| for_each_present_cpu(cpu) { |
| for (i = 0; i < ARRAY_SIZE(pcpu_stats); i++) { |
| sprintf(p, pcpu_stats[i].name, cpu); |
| p += ETH_GSTRING_LEN; |
| } |
| } |
| |
| break; |
| } |
| } |
| |
| static int |
| netvsc_get_rss_hash_opts(struct net_device_context *ndc, |
| struct ethtool_rxnfc *info) |
| { |
| const u32 l4_flag = RXH_L4_B_0_1 | RXH_L4_B_2_3; |
| |
| info->data = RXH_IP_SRC | RXH_IP_DST; |
| |
| switch (info->flow_type) { |
| case TCP_V4_FLOW: |
| if (ndc->l4_hash & HV_TCP4_L4HASH) |
| info->data |= l4_flag; |
| |
| break; |
| |
| case TCP_V6_FLOW: |
| if (ndc->l4_hash & HV_TCP6_L4HASH) |
| info->data |= l4_flag; |
| |
| break; |
| |
| case UDP_V4_FLOW: |
| if (ndc->l4_hash & HV_UDP4_L4HASH) |
| info->data |= l4_flag; |
| |
| break; |
| |
| case UDP_V6_FLOW: |
| if (ndc->l4_hash & HV_UDP6_L4HASH) |
| info->data |= l4_flag; |
| |
| break; |
| |
| case IPV4_FLOW: |
| case IPV6_FLOW: |
| break; |
| default: |
| info->data = 0; |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, |
| u32 *rules) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndc->nvdev); |
| |
| if (!nvdev) |
| return -ENODEV; |
| |
| switch (info->cmd) { |
| case ETHTOOL_GRXRINGS: |
| info->data = nvdev->num_chn; |
| return 0; |
| |
| case ETHTOOL_GRXFH: |
| return netvsc_get_rss_hash_opts(ndc, info); |
| } |
| return -EOPNOTSUPP; |
| } |
| |
| static int netvsc_set_rss_hash_opts(struct net_device_context *ndc, |
| struct ethtool_rxnfc *info) |
| { |
| if (info->data == (RXH_IP_SRC | RXH_IP_DST | |
| RXH_L4_B_0_1 | RXH_L4_B_2_3)) { |
| switch (info->flow_type) { |
| case TCP_V4_FLOW: |
| ndc->l4_hash |= HV_TCP4_L4HASH; |
| break; |
| |
| case TCP_V6_FLOW: |
| ndc->l4_hash |= HV_TCP6_L4HASH; |
| break; |
| |
| case UDP_V4_FLOW: |
| ndc->l4_hash |= HV_UDP4_L4HASH; |
| break; |
| |
| case UDP_V6_FLOW: |
| ndc->l4_hash |= HV_UDP6_L4HASH; |
| break; |
| |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| return 0; |
| } |
| |
| if (info->data == (RXH_IP_SRC | RXH_IP_DST)) { |
| switch (info->flow_type) { |
| case TCP_V4_FLOW: |
| ndc->l4_hash &= ~HV_TCP4_L4HASH; |
| break; |
| |
| case TCP_V6_FLOW: |
| ndc->l4_hash &= ~HV_TCP6_L4HASH; |
| break; |
| |
| case UDP_V4_FLOW: |
| ndc->l4_hash &= ~HV_UDP4_L4HASH; |
| break; |
| |
| case UDP_V6_FLOW: |
| ndc->l4_hash &= ~HV_UDP6_L4HASH; |
| break; |
| |
| default: |
| return -EOPNOTSUPP; |
| } |
| |
| return 0; |
| } |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int |
| netvsc_set_rxnfc(struct net_device *ndev, struct ethtool_rxnfc *info) |
| { |
| struct net_device_context *ndc = netdev_priv(ndev); |
| |
| if (info->cmd == ETHTOOL_SRXFH) |
| return netvsc_set_rss_hash_opts(ndc, info); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static u32 netvsc_get_rxfh_key_size(struct net_device *dev) |
| { |
| return NETVSC_HASH_KEYLEN; |
| } |
| |
| static u32 netvsc_rss_indir_size(struct net_device *dev) |
| { |
| return ITAB_NUM; |
| } |
| |
| static int netvsc_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, |
| u8 *hfunc) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
| struct rndis_device *rndis_dev; |
| int i; |
| |
| if (!ndev) |
| return -ENODEV; |
| |
| if (hfunc) |
| *hfunc = ETH_RSS_HASH_TOP; /* Toeplitz */ |
| |
| rndis_dev = ndev->extension; |
| if (indir) { |
| for (i = 0; i < ITAB_NUM; i++) |
| indir[i] = ndc->rx_table[i]; |
| } |
| |
| if (key) |
| memcpy(key, rndis_dev->rss_key, NETVSC_HASH_KEYLEN); |
| |
| return 0; |
| } |
| |
| static int netvsc_set_rxfh(struct net_device *dev, const u32 *indir, |
| const u8 *key, const u8 hfunc) |
| { |
| struct net_device_context *ndc = netdev_priv(dev); |
| struct netvsc_device *ndev = rtnl_dereference(ndc->nvdev); |
| struct rndis_device *rndis_dev; |
| int i; |
| |
| if (!ndev) |
| return -ENODEV; |
| |
| if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_TOP) |
| return -EOPNOTSUPP; |
| |
| rndis_dev = ndev->extension; |
| if (indir) { |
| for (i = 0; i < ITAB_NUM; i++) |
| if (indir[i] >= ndev->num_chn) |
| return -EINVAL; |
| |
| for (i = 0; i < ITAB_NUM; i++) |
| ndc->rx_table[i] = indir[i]; |
| } |
| |
| if (!key) { |
| if (!indir) |
| return 0; |
| |
| key = rndis_dev->rss_key; |
| } |
| |
| return rndis_filter_set_rss_param(rndis_dev, key); |
| } |
| |
| /* Hyper-V RNDIS protocol does not have ring in the HW sense. |
| * It does have pre-allocated receive area which is divided into sections. |
| */ |
| static void __netvsc_get_ringparam(struct netvsc_device *nvdev, |
| struct ethtool_ringparam *ring) |
| { |
| u32 max_buf_size; |
| |
| ring->rx_pending = nvdev->recv_section_cnt; |
| ring->tx_pending = nvdev->send_section_cnt; |
| |
| if (nvdev->nvsp_version <= NVSP_PROTOCOL_VERSION_2) |
| max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY; |
| else |
| max_buf_size = NETVSC_RECEIVE_BUFFER_SIZE; |
| |
| ring->rx_max_pending = max_buf_size / nvdev->recv_section_size; |
| ring->tx_max_pending = NETVSC_SEND_BUFFER_SIZE |
| / nvdev->send_section_size; |
| } |
| |
| static void netvsc_get_ringparam(struct net_device *ndev, |
| struct ethtool_ringparam *ring) |
| { |
| struct net_device_context *ndevctx = netdev_priv(ndev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
| |
| if (!nvdev) |
| return; |
| |
| __netvsc_get_ringparam(nvdev, ring); |
| } |
| |
| static int netvsc_set_ringparam(struct net_device *ndev, |
| struct ethtool_ringparam *ring) |
| { |
| struct net_device_context *ndevctx = netdev_priv(ndev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
| struct netvsc_device_info *device_info; |
| struct ethtool_ringparam orig; |
| u32 new_tx, new_rx; |
| int ret = 0; |
| |
| if (!nvdev || nvdev->destroy) |
| return -ENODEV; |
| |
| memset(&orig, 0, sizeof(orig)); |
| __netvsc_get_ringparam(nvdev, &orig); |
| |
| new_tx = clamp_t(u32, ring->tx_pending, |
| NETVSC_MIN_TX_SECTIONS, orig.tx_max_pending); |
| new_rx = clamp_t(u32, ring->rx_pending, |
| NETVSC_MIN_RX_SECTIONS, orig.rx_max_pending); |
| |
| if (new_tx == orig.tx_pending && |
| new_rx == orig.rx_pending) |
| return 0; /* no change */ |
| |
| device_info = netvsc_devinfo_get(nvdev); |
| |
| if (!device_info) |
| return -ENOMEM; |
| |
| device_info->send_sections = new_tx; |
| device_info->recv_sections = new_rx; |
| |
| ret = netvsc_detach(ndev, nvdev); |
| if (ret) |
| goto out; |
| |
| ret = netvsc_attach(ndev, device_info); |
| if (ret) { |
| device_info->send_sections = orig.tx_pending; |
| device_info->recv_sections = orig.rx_pending; |
| |
| if (netvsc_attach(ndev, device_info)) |
| netdev_err(ndev, "restoring ringparam failed"); |
| } |
| |
| out: |
| netvsc_devinfo_put(device_info); |
| return ret; |
| } |
| |
| static netdev_features_t netvsc_fix_features(struct net_device *ndev, |
| netdev_features_t features) |
| { |
| struct net_device_context *ndevctx = netdev_priv(ndev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
| |
| if (!nvdev || nvdev->destroy) |
| return features; |
| |
| if ((features & NETIF_F_LRO) && netvsc_xdp_get(nvdev)) { |
| features ^= NETIF_F_LRO; |
| netdev_info(ndev, "Skip LRO - unsupported with XDP\n"); |
| } |
| |
| return features; |
| } |
| |
| static int netvsc_set_features(struct net_device *ndev, |
| netdev_features_t features) |
| { |
| netdev_features_t change = features ^ ndev->features; |
| struct net_device_context *ndevctx = netdev_priv(ndev); |
| struct netvsc_device *nvdev = rtnl_dereference(ndevctx->nvdev); |
| struct net_device *vf_netdev = rtnl_dereference(ndevctx->vf_netdev); |
| struct ndis_offload_params offloads; |
| int ret = 0; |
| |
| if (!nvdev || nvdev->destroy) |
| return -ENODEV; |
| |
| if (!(change & NETIF_F_LRO)) |
| goto syncvf; |
| |
| memset(&offloads, 0, sizeof(struct ndis_offload_params)); |
| |
| if (features & NETIF_F_LRO) { |
| offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED; |
| offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_ENABLED; |
| } else { |
| offloads.rsc_ip_v4 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; |
| offloads.rsc_ip_v6 = NDIS_OFFLOAD_PARAMETERS_RSC_DISABLED; |
| } |
| |
| ret = rndis_filter_set_offload_params(ndev, nvdev, &offloads); |
| |
| if (ret) { |
| features ^= NETIF_F_LRO; |
| ndev->features = features; |
| } |
| |
| syncvf: |
| if (!vf_netdev) |
| return ret; |
| |
| vf_netdev->wanted_features = features; |
| netdev_update_features(vf_netdev); |
| |
| return ret; |
| } |
| |
| static int netvsc_get_regs_len(struct net_device *netdev) |
| { |
| return VRSS_SEND_TAB_SIZE * sizeof(u32); |
| } |
| |
| static void netvsc_get_regs(struct net_device *netdev, |
| struct ethtool_regs *regs, void *p) |
| { |
| struct net_device_context *ndc = netdev_priv(netdev); |
| u32 *regs_buff = p; |
| |
| /* increase the version, if buffer format is changed. */ |
| regs->version = 1; |
| |
| memcpy(regs_buff, ndc->tx_table, VRSS_SEND_TAB_SIZE * sizeof(u32)); |
| } |
| |
| static u32 netvsc_get_msglevel(struct net_device *ndev) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| |
| return ndev_ctx->msg_enable; |
| } |
| |
| static void netvsc_set_msglevel(struct net_device *ndev, u32 val) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| |
| ndev_ctx->msg_enable = val; |
| } |
| |
| static const struct ethtool_ops ethtool_ops = { |
| .get_drvinfo = netvsc_get_drvinfo, |
| .get_regs_len = netvsc_get_regs_len, |
| .get_regs = netvsc_get_regs, |
| .get_msglevel = netvsc_get_msglevel, |
| .set_msglevel = netvsc_set_msglevel, |
| .get_link = ethtool_op_get_link, |
| .get_ethtool_stats = netvsc_get_ethtool_stats, |
| .get_sset_count = netvsc_get_sset_count, |
| .get_strings = netvsc_get_strings, |
| .get_channels = netvsc_get_channels, |
| .set_channels = netvsc_set_channels, |
| .get_ts_info = ethtool_op_get_ts_info, |
| .get_rxnfc = netvsc_get_rxnfc, |
| .set_rxnfc = netvsc_set_rxnfc, |
| .get_rxfh_key_size = netvsc_get_rxfh_key_size, |
| .get_rxfh_indir_size = netvsc_rss_indir_size, |
| .get_rxfh = netvsc_get_rxfh, |
| .set_rxfh = netvsc_set_rxfh, |
| .get_link_ksettings = netvsc_get_link_ksettings, |
| .set_link_ksettings = netvsc_set_link_ksettings, |
| .get_ringparam = netvsc_get_ringparam, |
| .set_ringparam = netvsc_set_ringparam, |
| }; |
| |
| static const struct net_device_ops device_ops = { |
| .ndo_open = netvsc_open, |
| .ndo_stop = netvsc_close, |
| .ndo_start_xmit = netvsc_start_xmit, |
| .ndo_change_rx_flags = netvsc_change_rx_flags, |
| .ndo_set_rx_mode = netvsc_set_rx_mode, |
| .ndo_fix_features = netvsc_fix_features, |
| .ndo_set_features = netvsc_set_features, |
| .ndo_change_mtu = netvsc_change_mtu, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = netvsc_set_mac_addr, |
| .ndo_select_queue = netvsc_select_queue, |
| .ndo_get_stats64 = netvsc_get_stats64, |
| .ndo_bpf = netvsc_bpf, |
| }; |
| |
| /* |
| * Handle link status changes. For RNDIS_STATUS_NETWORK_CHANGE emulate link |
| * down/up sequence. In case of RNDIS_STATUS_MEDIA_CONNECT when carrier is |
| * present send GARP packet to network peers with netif_notify_peers(). |
| */ |
| static void netvsc_link_change(struct work_struct *w) |
| { |
| struct net_device_context *ndev_ctx = |
| container_of(w, struct net_device_context, dwork.work); |
| struct hv_device *device_obj = ndev_ctx->device_ctx; |
| struct net_device *net = hv_get_drvdata(device_obj); |
| struct netvsc_device *net_device; |
| struct rndis_device *rdev; |
| struct netvsc_reconfig *event = NULL; |
| bool notify = false, reschedule = false; |
| unsigned long flags, next_reconfig, delay; |
| |
| /* if changes are happening, comeback later */ |
| if (!rtnl_trylock()) { |
| schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); |
| return; |
| } |
| |
| net_device = rtnl_dereference(ndev_ctx->nvdev); |
| if (!net_device) |
| goto out_unlock; |
| |
| rdev = net_device->extension; |
| |
| next_reconfig = ndev_ctx->last_reconfig + LINKCHANGE_INT; |
| if (time_is_after_jiffies(next_reconfig)) { |
| /* link_watch only sends one notification with current state |
| * per second, avoid doing reconfig more frequently. Handle |
| * wrap around. |
| */ |
| delay = next_reconfig - jiffies; |
| delay = delay < LINKCHANGE_INT ? delay : LINKCHANGE_INT; |
| schedule_delayed_work(&ndev_ctx->dwork, delay); |
| goto out_unlock; |
| } |
| ndev_ctx->last_reconfig = jiffies; |
| |
| spin_lock_irqsave(&ndev_ctx->lock, flags); |
| if (!list_empty(&ndev_ctx->reconfig_events)) { |
| event = list_first_entry(&ndev_ctx->reconfig_events, |
| struct netvsc_reconfig, list); |
| list_del(&event->list); |
| reschedule = !list_empty(&ndev_ctx->reconfig_events); |
| } |
| spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| |
| if (!event) |
| goto out_unlock; |
| |
| switch (event->event) { |
| /* Only the following events are possible due to the check in |
| * netvsc_linkstatus_callback() |
| */ |
| case RNDIS_STATUS_MEDIA_CONNECT: |
| if (rdev->link_state) { |
| rdev->link_state = false; |
| netif_carrier_on(net); |
| netvsc_tx_enable(net_device, net); |
| } else { |
| notify = true; |
| } |
| kfree(event); |
| break; |
| case RNDIS_STATUS_MEDIA_DISCONNECT: |
| if (!rdev->link_state) { |
| rdev->link_state = true; |
| netif_carrier_off(net); |
| netvsc_tx_disable(net_device, net); |
| } |
| kfree(event); |
| break; |
| case RNDIS_STATUS_NETWORK_CHANGE: |
| /* Only makes sense if carrier is present */ |
| if (!rdev->link_state) { |
| rdev->link_state = true; |
| netif_carrier_off(net); |
| netvsc_tx_disable(net_device, net); |
| event->event = RNDIS_STATUS_MEDIA_CONNECT; |
| spin_lock_irqsave(&ndev_ctx->lock, flags); |
| list_add(&event->list, &ndev_ctx->reconfig_events); |
| spin_unlock_irqrestore(&ndev_ctx->lock, flags); |
| reschedule = true; |
| } |
| break; |
| } |
| |
| rtnl_unlock(); |
| |
| if (notify) |
| netdev_notify_peers(net); |
| |
| /* link_watch only sends one notification with current state per |
| * second, handle next reconfig event in 2 seconds. |
| */ |
| if (reschedule) |
| schedule_delayed_work(&ndev_ctx->dwork, LINKCHANGE_INT); |
| |
| return; |
| |
| out_unlock: |
| rtnl_unlock(); |
| } |
| |
| static struct net_device *get_netvsc_byref(struct net_device *vf_netdev) |
| { |
| struct net_device_context *net_device_ctx; |
| struct net_device *dev; |
| |
| dev = netdev_master_upper_dev_get(vf_netdev); |
| if (!dev || dev->netdev_ops != &device_ops) |
| return NULL; /* not a netvsc device */ |
| |
| net_device_ctx = netdev_priv(dev); |
| if (!rtnl_dereference(net_device_ctx->nvdev)) |
| return NULL; /* device is removed */ |
| |
| return dev; |
| } |
| |
| /* Called when VF is injecting data into network stack. |
| * Change the associated network device from VF to netvsc. |
| * note: already called with rcu_read_lock |
| */ |
| static rx_handler_result_t netvsc_vf_handle_frame(struct sk_buff **pskb) |
| { |
| struct sk_buff *skb = *pskb; |
| struct net_device *ndev = rcu_dereference(skb->dev->rx_handler_data); |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| struct netvsc_vf_pcpu_stats *pcpu_stats |
| = this_cpu_ptr(ndev_ctx->vf_stats); |
| |
| skb = skb_share_check(skb, GFP_ATOMIC); |
| if (unlikely(!skb)) |
| return RX_HANDLER_CONSUMED; |
| |
| *pskb = skb; |
| |
| skb->dev = ndev; |
| |
| u64_stats_update_begin(&pcpu_stats->syncp); |
| pcpu_stats->rx_packets++; |
| pcpu_stats->rx_bytes += skb->len; |
| u64_stats_update_end(&pcpu_stats->syncp); |
| |
| return RX_HANDLER_ANOTHER; |
| } |
| |
| static int netvsc_vf_join(struct net_device *vf_netdev, |
| struct net_device *ndev) |
| { |
| struct net_device_context *ndev_ctx = netdev_priv(ndev); |
| int ret; |
| |
| ret = netdev_rx_handler_register(vf_netdev, |
| netvsc_vf_handle_frame, ndev); |
| if (ret != 0) { |
| netdev_err(vf_netdev, |
| "can not register netvsc VF receive handler (err = %d)\n", |
| ret); |
| goto rx_handler_failed; |
| } |
| |
| ret = netdev_master_upper_dev_link(vf_netdev, ndev, |
| NULL, NULL, NULL); |
| if (ret != 0) { |
| netdev_err(vf_netdev, |
| "can not set master device %s (err = %d)\n", |
| ndev->name, ret); |
| goto upper_link_failed; |
| } |
| |
| /* set slave flag before open to prevent IPv6 addrconf */ |
| vf_netdev->flags |= IFF_SLAVE; |
| |
| schedule_delayed_work(&ndev_ctx->vf_takeover, VF_TAKEOVER_INT); |
| |
| call_netdevice_notifiers(NETDEV_JOIN, vf_netdev); |
| |
| netdev_info(vf_netdev, "joined to %s\n", ndev->name); |
| return 0; |
| |
| upper_link_failed: |
| netdev_rx_handler_unregister(vf_netdev); |
| rx_handler_failed: |
| return ret; |
| } |
| |
| static void __netvsc_vf_setup(struct net_device *ndev, |
| struct net_device *vf_netdev) |
| { |
| int ret; |
| |
| /* Align MTU of VF with master */ |
| ret = dev_set_mtu(vf_netdev, ndev->mtu); |
| if (ret) |
| netdev_warn(vf_netdev, |
| "unable to change mtu to %u\n", ndev->mtu); |
| |
| /* set multicast etc flags on VF */ |
| dev_change_flags(vf_netdev, ndev->flags | IFF_SLAVE, NULL); |
| |
| /* sync address list from ndev to VF */ |
| netif_addr_lock_bh(ndev); |
| dev_uc_sync(vf_netdev, ndev); |
| dev_mc_sync(vf_netdev, ndev); |
| netif_addr_unlock_bh(ndev); |
| |
| if (netif_running(ndev)) { |
| ret = dev_open(vf_netdev, NULL); |
| if (ret) |
| netdev_warn(vf_netdev, |
| "unable to open: %d\n", ret); |
| } |
| } |
| |
| /* Setup VF as slave of the synthetic device. |
| * Runs in workqueue to avoid recursion in netlink callbacks. |
| */ |
| static void netvsc_vf_setup(struct work_struct *w) |
| { |
| struct net_device_context *ndev_ctx |
| = container_of(w, struct net_device_context, vf_takeover.work); |
| struct net_device *ndev = hv_get_drvdata(ndev_ctx->device_ctx); |
| struct net_device *vf_netdev; |
| |
| if (!rtnl_trylock()) { |
| schedule_delayed_work(&ndev_ctx->vf_takeover, 0); |
| return; |
| } |
| |
| vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
| if (vf_netdev) |
| __netvsc_vf_setup(ndev, vf_netdev); |
| |
| rtnl_unlock(); |
| } |
| |
| /* Find netvsc by VF serial number. |
| * The PCI hyperv controller records the serial number as the slot kobj name. |
| */ |
| static struct net_device *get_netvsc_byslot(const struct net_device *vf_netdev) |
| { |
| struct device *parent = vf_netdev->dev.parent; |
| struct net_device_context *ndev_ctx; |
| struct pci_dev *pdev; |
| u32 serial; |
| |
| if (!parent || !dev_is_pci(parent)) |
| return NULL; /* not a PCI device */ |
| |
| pdev = to_pci_dev(parent); |
| if (!pdev->slot) { |
| netdev_notice(vf_netdev, "no PCI slot information\n"); |
| return NULL; |
| } |
| |
| if (kstrtou32(pci_slot_name(pdev->slot), 10, &serial)) { |
| netdev_notice(vf_netdev, "Invalid vf serial:%s\n", |
| pci_slot_name(pdev->slot)); |
| return NULL; |
| } |
| |
| list_for_each_entry(ndev_ctx, &netvsc_dev_list, list) { |
| if (!ndev_ctx->vf_alloc) |
| continue; |
| |
| if (ndev_ctx->vf_serial == serial) |
| return hv_get_drvdata(ndev_ctx->device_ctx); |
| } |
| |
| netdev_notice(vf_netdev, |
| "no netdev found for vf serial:%u\n", serial); |
| return NULL; |
| } |
| |
| static int netvsc_register_vf(struct net_device *vf_netdev) |
| { |
| struct net_device_context *net_device_ctx; |
| struct netvsc_device *netvsc_dev; |
| struct bpf_prog *prog; |
| struct net_device *ndev; |
| int ret; |
| |
| if (vf_netdev->addr_len != ETH_ALEN) |
| return NOTIFY_DONE; |
| |
| ndev = get_netvsc_byslot(vf_netdev); |
| if (!ndev) |
| return NOTIFY_DONE; |
| |
| net_device_ctx = netdev_priv(ndev); |
| netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
| if (!netvsc_dev || rtnl_dereference(net_device_ctx->vf_netdev)) |
| return NOTIFY_DONE; |
| |
| /* if synthetic interface is a different namespace, |
| * then move the VF to that namespace; join will be |
| * done again in that context. |
| */ |
| if (!net_eq(dev_net(ndev), dev_net(vf_netdev))) { |
| ret = dev_change_net_namespace(vf_netdev, |
| dev_net(ndev), "eth%d"); |
| if (ret) |
| netdev_err(vf_netdev, |
| "could not move to same namespace as %s: %d\n", |
| ndev->name, ret); |
| else |
| netdev_info(vf_netdev, |
| "VF moved to namespace with: %s\n", |
| ndev->name); |
| return NOTIFY_DONE; |
| } |
| |
| netdev_info(ndev, "VF registering: %s\n", vf_netdev->name); |
| |
| if (netvsc_vf_join(vf_netdev, ndev) != 0) |
| return NOTIFY_DONE; |
| |
| dev_hold(vf_netdev); |
| rcu_assign_pointer(net_device_ctx->vf_netdev, vf_netdev); |
| |
| vf_netdev->wanted_features = ndev->features; |
| netdev_update_features(vf_netdev); |
| |
| prog = netvsc_xdp_get(netvsc_dev); |
| netvsc_vf_setxdp(vf_netdev, prog); |
| |
| return NOTIFY_OK; |
| } |
| |
| /* VF up/down change detected, schedule to change data path */ |
| static int netvsc_vf_changed(struct net_device *vf_netdev) |
| { |
| struct net_device_context *net_device_ctx; |
| struct netvsc_device *netvsc_dev; |
| struct net_device *ndev; |
| bool vf_is_up = netif_running(vf_netdev); |
| |
| ndev = get_netvsc_byref(vf_netdev); |
| if (!ndev) |
| return NOTIFY_DONE; |
| |
| net_device_ctx = netdev_priv(ndev); |
| netvsc_dev = rtnl_dereference(net_device_ctx->nvdev); |
| if (!netvsc_dev) |
| return NOTIFY_DONE; |
| |
| netvsc_switch_datapath(ndev, vf_is_up); |
| netdev_info(ndev, "Data path switched %s VF: %s\n", |
| vf_is_up ? "to" : "from", vf_netdev->name); |
| |
| return NOTIFY_OK; |
| } |
| |
| static int netvsc_unregister_vf(struct net_device *vf_netdev) |
| { |
| struct net_device *ndev; |
| struct net_device_context *net_device_ctx; |
| |
| ndev = get_netvsc_byref(vf_netdev); |
| if (!ndev) |
| return NOTIFY_DONE; |
| |
| net_device_ctx = netdev_priv(ndev); |
| cancel_delayed_work_sync(&net_device_ctx->vf_takeover); |
| |
| netdev_info(ndev, "VF unregistering: %s\n", vf_netdev->name); |
| |
| netvsc_vf_setxdp(vf_netdev, NULL); |
| |
| netdev_rx_handler_unregister(vf_netdev); |
| netdev_upper_dev_unlink(vf_netdev, ndev); |
| RCU_INIT_POINTER(net_device_ctx->vf_netdev, NULL); |
| dev_put(vf_netdev); |
| |
| return NOTIFY_OK; |
| } |
| |
| static int netvsc_probe(struct hv_device *dev, |
| const struct hv_vmbus_device_id *dev_id) |
| { |
| struct net_device *net = NULL; |
| struct net_device_context *net_device_ctx; |
| struct netvsc_device_info *device_info = NULL; |
| struct netvsc_device *nvdev; |
| int ret = -ENOMEM; |
| |
| net = alloc_etherdev_mq(sizeof(struct net_device_context), |
| VRSS_CHANNEL_MAX); |
| if (!net) |
| goto no_net; |
| |
| netif_carrier_off(net); |
| |
| netvsc_init_settings(net); |
| |
| net_device_ctx = netdev_priv(net); |
| net_device_ctx->device_ctx = dev; |
| net_device_ctx->msg_enable = netif_msg_init(debug, default_msg); |
| if (netif_msg_probe(net_device_ctx)) |
| netdev_dbg(net, "netvsc msg_enable: %d\n", |
| net_device_ctx->msg_enable); |
| |
| hv_set_drvdata(dev, net); |
| |
| INIT_DELAYED_WORK(&net_device_ctx->dwork, netvsc_link_change); |
| |
| spin_lock_init(&net_device_ctx->lock); |
| INIT_LIST_HEAD(&net_device_ctx->reconfig_events); |
| INIT_DELAYED_WORK(&net_device_ctx->vf_takeover, netvsc_vf_setup); |
| |
| net_device_ctx->vf_stats |
| = netdev_alloc_pcpu_stats(struct netvsc_vf_pcpu_stats); |
| if (!net_device_ctx->vf_stats) |
| goto no_stats; |
| |
| net->netdev_ops = &device_ops; |
| net->ethtool_ops = ðtool_ops; |
| SET_NETDEV_DEV(net, &dev->device); |
| |
| /* We always need headroom for rndis header */ |
| net->needed_headroom = RNDIS_AND_PPI_SIZE; |
| |
| /* Initialize the number of queues to be 1, we may change it if more |
| * channels are offered later. |
| */ |
| netif_set_real_num_tx_queues(net, 1); |
| netif_set_real_num_rx_queues(net, 1); |
| |
| /* Notify the netvsc driver of the new device */ |
| device_info = netvsc_devinfo_get(NULL); |
| |
| if (!device_info) { |
| ret = -ENOMEM; |
| goto devinfo_failed; |
| } |
| |
| nvdev = rndis_filter_device_add(dev, device_info); |
| if (IS_ERR(nvdev)) { |
| ret = PTR_ERR(nvdev); |
| netdev_err(net, "unable to add netvsc device (ret %d)\n", ret); |
| goto rndis_failed; |
| } |
| |
| memcpy(net->dev_addr, device_info->mac_adr, ETH_ALEN); |
| |
| /* We must get rtnl lock before scheduling nvdev->subchan_work, |
| * otherwise netvsc_subchan_work() can get rtnl lock first and wait |
| * all subchannels to show up, but that may not happen because |
| * netvsc_probe() can't get rtnl lock and as a result vmbus_onoffer() |
| * -> ... -> device_add() -> ... -> __device_attach() can't get |
| * the device lock, so all the subchannels can't be processed -- |
| * finally netvsc_subchan_work() hangs forever. |
| */ |
| rtnl_lock(); |
| |
| if (nvdev->num_chn > 1) |
| schedule_work(&nvdev->subchan_work); |
| |
| /* hw_features computed in rndis_netdev_set_hwcaps() */ |
| net->features = net->hw_features | |
| NETIF_F_HIGHDMA | NETIF_F_HW_VLAN_CTAG_TX | |
| NETIF_F_HW_VLAN_CTAG_RX; |
| net->vlan_features = net->features; |
| |
| netdev_lockdep_set_classes(net); |
| |
| /* MTU range: 68 - 1500 or 65521 */ |
| net->min_mtu = NETVSC_MTU_MIN; |
| if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) |
| net->max_mtu = NETVSC_MTU - ETH_HLEN; |
| else |
| net->max_mtu = ETH_DATA_LEN; |
| |
| nvdev->tx_disable = false; |
| |
| ret = register_netdevice(net); |
| if (ret != 0) { |
| pr_err("Unable to register netdev.\n"); |
| goto register_failed; |
| } |
| |
| list_add(&net_device_ctx->list, &netvsc_dev_list); |
| rtnl_unlock(); |
| |
| netvsc_devinfo_put(device_info); |
| return 0; |
| |
| register_failed: |
| rtnl_unlock(); |
| rndis_filter_device_remove(dev, nvdev); |
| rndis_failed: |
| netvsc_devinfo_put(device_info); |
| devinfo_failed: |
| free_percpu(net_device_ctx->vf_stats); |
| no_stats: |
| hv_set_drvdata(dev, NULL); |
| free_netdev(net); |
| no_net: |
| return ret; |
| } |
| |
| static int netvsc_remove(struct hv_device *dev) |
| { |
| struct net_device_context *ndev_ctx; |
| struct net_device *vf_netdev, *net; |
| struct netvsc_device *nvdev; |
| |
| net = hv_get_drvdata(dev); |
| if (net == NULL) { |
| dev_err(&dev->device, "No net device to remove\n"); |
| return 0; |
| } |
| |
| ndev_ctx = netdev_priv(net); |
| |
| cancel_delayed_work_sync(&ndev_ctx->dwork); |
| |
| rtnl_lock(); |
| nvdev = rtnl_dereference(ndev_ctx->nvdev); |
| if (nvdev) { |
| cancel_work_sync(&nvdev->subchan_work); |
| netvsc_xdp_set(net, NULL, NULL, nvdev); |
| } |
| |
| /* |
| * Call to the vsc driver to let it know that the device is being |
| * removed. Also blocks mtu and channel changes. |
| */ |
| vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
| if (vf_netdev) |
| netvsc_unregister_vf(vf_netdev); |
| |
| if (nvdev) |
| rndis_filter_device_remove(dev, nvdev); |
| |
| unregister_netdevice(net); |
| list_del(&ndev_ctx->list); |
| |
| rtnl_unlock(); |
| |
| hv_set_drvdata(dev, NULL); |
| |
| free_percpu(ndev_ctx->vf_stats); |
| free_netdev(net); |
| return 0; |
| } |
| |
| static int netvsc_suspend(struct hv_device *dev) |
| { |
| struct net_device_context *ndev_ctx; |
| struct net_device *vf_netdev, *net; |
| struct netvsc_device *nvdev; |
| int ret; |
| |
| net = hv_get_drvdata(dev); |
| |
| ndev_ctx = netdev_priv(net); |
| cancel_delayed_work_sync(&ndev_ctx->dwork); |
| |
| rtnl_lock(); |
| |
| nvdev = rtnl_dereference(ndev_ctx->nvdev); |
| if (nvdev == NULL) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| vf_netdev = rtnl_dereference(ndev_ctx->vf_netdev); |
| if (vf_netdev) |
| netvsc_unregister_vf(vf_netdev); |
| |
| /* Save the current config info */ |
| ndev_ctx->saved_netvsc_dev_info = netvsc_devinfo_get(nvdev); |
| |
| ret = netvsc_detach(net, nvdev); |
| out: |
| rtnl_unlock(); |
| |
| return ret; |
| } |
| |
| static int netvsc_resume(struct hv_device *dev) |
| { |
| struct net_device *net = hv_get_drvdata(dev); |
| struct net_device_context *net_device_ctx; |
| struct netvsc_device_info *device_info; |
| int ret; |
| |
| rtnl_lock(); |
| |
| net_device_ctx = netdev_priv(net); |
| device_info = net_device_ctx->saved_netvsc_dev_info; |
| |
| ret = netvsc_attach(net, device_info); |
| |
| netvsc_devinfo_put(device_info); |
| net_device_ctx->saved_netvsc_dev_info = NULL; |
| |
| rtnl_unlock(); |
| |
| return ret; |
| } |
| static const struct hv_vmbus_device_id id_table[] = { |
| /* Network guid */ |
| { HV_NIC_GUID, }, |
| { }, |
| }; |
| |
| MODULE_DEVICE_TABLE(vmbus, id_table); |
| |
| /* The one and only one */ |
| static struct hv_driver netvsc_drv = { |
| .name = KBUILD_MODNAME, |
| .id_table = id_table, |
| .probe = netvsc_probe, |
| .remove = netvsc_remove, |
| .suspend = netvsc_suspend, |
| .resume = netvsc_resume, |
| .driver = { |
| .probe_type = PROBE_FORCE_SYNCHRONOUS, |
| }, |
| }; |
| |
| /* |
| * On Hyper-V, every VF interface is matched with a corresponding |
| * synthetic interface. The synthetic interface is presented first |
| * to the guest. When the corresponding VF instance is registered, |
| * we will take care of switching the data path. |
| */ |
| static int netvsc_netdev_event(struct notifier_block *this, |
| unsigned long event, void *ptr) |
| { |
| struct net_device *event_dev = netdev_notifier_info_to_dev(ptr); |
| |
| /* Skip our own events */ |
| if (event_dev->netdev_ops == &device_ops) |
| return NOTIFY_DONE; |
| |
| /* Avoid non-Ethernet type devices */ |
| if (event_dev->type != ARPHRD_ETHER) |
| return NOTIFY_DONE; |
| |
| /* Avoid Vlan dev with same MAC registering as VF */ |
| if (is_vlan_dev(event_dev)) |
| return NOTIFY_DONE; |
| |
| /* Avoid Bonding master dev with same MAC registering as VF */ |
| if ((event_dev->priv_flags & IFF_BONDING) && |
| (event_dev->flags & IFF_MASTER)) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case NETDEV_REGISTER: |
| return netvsc_register_vf(event_dev); |
| case NETDEV_UNREGISTER: |
| return netvsc_unregister_vf(event_dev); |
| case NETDEV_UP: |
| case NETDEV_DOWN: |
| return netvsc_vf_changed(event_dev); |
| default: |
| return NOTIFY_DONE; |
| } |
| } |
| |
| static struct notifier_block netvsc_netdev_notifier = { |
| .notifier_call = netvsc_netdev_event, |
| }; |
| |
| static void __exit netvsc_drv_exit(void) |
| { |
| unregister_netdevice_notifier(&netvsc_netdev_notifier); |
| vmbus_driver_unregister(&netvsc_drv); |
| } |
| |
| static int __init netvsc_drv_init(void) |
| { |
| int ret; |
| |
| if (ring_size < RING_SIZE_MIN) { |
| ring_size = RING_SIZE_MIN; |
| pr_info("Increased ring_size to %u (min allowed)\n", |
| ring_size); |
| } |
| netvsc_ring_bytes = ring_size * PAGE_SIZE; |
| |
| ret = vmbus_driver_register(&netvsc_drv); |
| if (ret) |
| return ret; |
| |
| register_netdevice_notifier(&netvsc_netdev_notifier); |
| return 0; |
| } |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Microsoft Hyper-V network driver"); |
| |
| module_init(netvsc_drv_init); |
| module_exit(netvsc_drv_exit); |