| /* |
| * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. |
| * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #include <linux/skbuff.h> |
| #include <linux/if_arp.h> |
| #include <linux/netdevice.h> |
| #include <linux/if.h> |
| #include <linux/if_vlan.h> |
| #include <net/udp_tunnel.h> |
| #include <net/sch_generic.h> |
| #include <linux/netfilter.h> |
| #include <rdma/ib_addr.h> |
| |
| #include "rxe.h" |
| #include "rxe_net.h" |
| #include "rxe_loc.h" |
| |
| static LIST_HEAD(rxe_dev_list); |
| static spinlock_t dev_list_lock; /* spinlock for device list */ |
| |
| struct rxe_dev *net_to_rxe(struct net_device *ndev) |
| { |
| struct rxe_dev *rxe; |
| struct rxe_dev *found = NULL; |
| |
| spin_lock_bh(&dev_list_lock); |
| list_for_each_entry(rxe, &rxe_dev_list, list) { |
| if (rxe->ndev == ndev) { |
| found = rxe; |
| break; |
| } |
| } |
| spin_unlock_bh(&dev_list_lock); |
| |
| return found; |
| } |
| |
| struct rxe_dev *get_rxe_by_name(const char* name) |
| { |
| struct rxe_dev *rxe; |
| struct rxe_dev *found = NULL; |
| |
| spin_lock_bh(&dev_list_lock); |
| list_for_each_entry(rxe, &rxe_dev_list, list) { |
| if (!strcmp(name, rxe->ib_dev.name)) { |
| found = rxe; |
| break; |
| } |
| } |
| spin_unlock_bh(&dev_list_lock); |
| return found; |
| } |
| |
| |
| struct rxe_recv_sockets recv_sockets; |
| |
| static __be64 rxe_mac_to_eui64(struct net_device *ndev) |
| { |
| unsigned char *mac_addr = ndev->dev_addr; |
| __be64 eui64; |
| unsigned char *dst = (unsigned char *)&eui64; |
| |
| dst[0] = mac_addr[0] ^ 2; |
| dst[1] = mac_addr[1]; |
| dst[2] = mac_addr[2]; |
| dst[3] = 0xff; |
| dst[4] = 0xfe; |
| dst[5] = mac_addr[3]; |
| dst[6] = mac_addr[4]; |
| dst[7] = mac_addr[5]; |
| |
| return eui64; |
| } |
| |
| static __be64 node_guid(struct rxe_dev *rxe) |
| { |
| return rxe_mac_to_eui64(rxe->ndev); |
| } |
| |
| static __be64 port_guid(struct rxe_dev *rxe) |
| { |
| return rxe_mac_to_eui64(rxe->ndev); |
| } |
| |
| static struct device *dma_device(struct rxe_dev *rxe) |
| { |
| struct net_device *ndev; |
| |
| ndev = rxe->ndev; |
| |
| if (ndev->priv_flags & IFF_802_1Q_VLAN) |
| ndev = vlan_dev_real_dev(ndev); |
| |
| return ndev->dev.parent; |
| } |
| |
| static int mcast_add(struct rxe_dev *rxe, union ib_gid *mgid) |
| { |
| int err; |
| unsigned char ll_addr[ETH_ALEN]; |
| |
| ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); |
| err = dev_mc_add(rxe->ndev, ll_addr); |
| |
| return err; |
| } |
| |
| static int mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid) |
| { |
| int err; |
| unsigned char ll_addr[ETH_ALEN]; |
| |
| ipv6_eth_mc_map((struct in6_addr *)mgid->raw, ll_addr); |
| err = dev_mc_del(rxe->ndev, ll_addr); |
| |
| return err; |
| } |
| |
| static struct dst_entry *rxe_find_route4(struct net_device *ndev, |
| struct in_addr *saddr, |
| struct in_addr *daddr) |
| { |
| struct rtable *rt; |
| struct flowi4 fl = { { 0 } }; |
| |
| memset(&fl, 0, sizeof(fl)); |
| fl.flowi4_oif = ndev->ifindex; |
| memcpy(&fl.saddr, saddr, sizeof(*saddr)); |
| memcpy(&fl.daddr, daddr, sizeof(*daddr)); |
| fl.flowi4_proto = IPPROTO_UDP; |
| |
| rt = ip_route_output_key(&init_net, &fl); |
| if (IS_ERR(rt)) { |
| pr_err_ratelimited("no route to %pI4\n", &daddr->s_addr); |
| return NULL; |
| } |
| |
| return &rt->dst; |
| } |
| |
| #if IS_ENABLED(CONFIG_IPV6) |
| static struct dst_entry *rxe_find_route6(struct net_device *ndev, |
| struct in6_addr *saddr, |
| struct in6_addr *daddr) |
| { |
| struct dst_entry *ndst; |
| struct flowi6 fl6 = { { 0 } }; |
| |
| memset(&fl6, 0, sizeof(fl6)); |
| fl6.flowi6_oif = ndev->ifindex; |
| memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
| memcpy(&fl6.daddr, daddr, sizeof(*daddr)); |
| fl6.flowi6_proto = IPPROTO_UDP; |
| |
| if (unlikely(ipv6_stub->ipv6_dst_lookup(sock_net(recv_sockets.sk6->sk), |
| recv_sockets.sk6->sk, &ndst, &fl6))) { |
| pr_err_ratelimited("no route to %pI6\n", daddr); |
| goto put; |
| } |
| |
| if (unlikely(ndst->error)) { |
| pr_err("no route to %pI6\n", daddr); |
| goto put; |
| } |
| |
| return ndst; |
| put: |
| dst_release(ndst); |
| return NULL; |
| } |
| |
| #else |
| |
| static struct dst_entry *rxe_find_route6(struct net_device *ndev, |
| struct in6_addr *saddr, |
| struct in6_addr *daddr) |
| { |
| return NULL; |
| } |
| |
| #endif |
| |
| static int rxe_udp_encap_recv(struct sock *sk, struct sk_buff *skb) |
| { |
| struct udphdr *udph; |
| struct net_device *ndev = skb->dev; |
| struct rxe_dev *rxe = net_to_rxe(ndev); |
| struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
| |
| if (!rxe) |
| goto drop; |
| |
| if (skb_linearize(skb)) { |
| pr_err("skb_linearize failed\n"); |
| goto drop; |
| } |
| |
| udph = udp_hdr(skb); |
| pkt->rxe = rxe; |
| pkt->port_num = 1; |
| pkt->hdr = (u8 *)(udph + 1); |
| pkt->mask = RXE_GRH_MASK; |
| pkt->paylen = be16_to_cpu(udph->len) - sizeof(*udph); |
| |
| return rxe_rcv(skb); |
| drop: |
| kfree_skb(skb); |
| return 0; |
| } |
| |
| static struct socket *rxe_setup_udp_tunnel(struct net *net, __be16 port, |
| bool ipv6) |
| { |
| int err; |
| struct socket *sock; |
| struct udp_port_cfg udp_cfg; |
| struct udp_tunnel_sock_cfg tnl_cfg; |
| |
| memset(&udp_cfg, 0, sizeof(udp_cfg)); |
| |
| if (ipv6) { |
| udp_cfg.family = AF_INET6; |
| udp_cfg.ipv6_v6only = 1; |
| } else { |
| udp_cfg.family = AF_INET; |
| } |
| |
| udp_cfg.local_udp_port = port; |
| |
| /* Create UDP socket */ |
| err = udp_sock_create(net, &udp_cfg, &sock); |
| if (err < 0) { |
| pr_err("failed to create udp socket. err = %d\n", err); |
| return ERR_PTR(err); |
| } |
| |
| tnl_cfg.sk_user_data = NULL; |
| tnl_cfg.encap_type = 1; |
| tnl_cfg.encap_rcv = rxe_udp_encap_recv; |
| tnl_cfg.encap_destroy = NULL; |
| |
| /* Setup UDP tunnel */ |
| setup_udp_tunnel_sock(net, sock, &tnl_cfg); |
| |
| return sock; |
| } |
| |
| static void rxe_release_udp_tunnel(struct socket *sk) |
| { |
| udp_tunnel_sock_release(sk); |
| } |
| |
| static void prepare_udp_hdr(struct sk_buff *skb, __be16 src_port, |
| __be16 dst_port) |
| { |
| struct udphdr *udph; |
| |
| __skb_push(skb, sizeof(*udph)); |
| skb_reset_transport_header(skb); |
| udph = udp_hdr(skb); |
| |
| udph->dest = dst_port; |
| udph->source = src_port; |
| udph->len = htons(skb->len); |
| udph->check = 0; |
| } |
| |
| static void prepare_ipv4_hdr(struct dst_entry *dst, struct sk_buff *skb, |
| __be32 saddr, __be32 daddr, __u8 proto, |
| __u8 tos, __u8 ttl, __be16 df, bool xnet) |
| { |
| struct iphdr *iph; |
| |
| skb_scrub_packet(skb, xnet); |
| |
| skb_clear_hash(skb); |
| skb_dst_set(skb, dst); |
| memset(IPCB(skb), 0, sizeof(*IPCB(skb))); |
| |
| skb_push(skb, sizeof(struct iphdr)); |
| skb_reset_network_header(skb); |
| |
| iph = ip_hdr(skb); |
| |
| iph->version = IPVERSION; |
| iph->ihl = sizeof(struct iphdr) >> 2; |
| iph->frag_off = df; |
| iph->protocol = proto; |
| iph->tos = tos; |
| iph->daddr = daddr; |
| iph->saddr = saddr; |
| iph->ttl = ttl; |
| __ip_select_ident(dev_net(dst->dev), iph, |
| skb_shinfo(skb)->gso_segs ?: 1); |
| iph->tot_len = htons(skb->len); |
| ip_send_check(iph); |
| } |
| |
| static void prepare_ipv6_hdr(struct dst_entry *dst, struct sk_buff *skb, |
| struct in6_addr *saddr, struct in6_addr *daddr, |
| __u8 proto, __u8 prio, __u8 ttl) |
| { |
| struct ipv6hdr *ip6h; |
| |
| memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); |
| IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
| | IPSKB_REROUTED); |
| skb_dst_set(skb, dst); |
| |
| __skb_push(skb, sizeof(*ip6h)); |
| skb_reset_network_header(skb); |
| ip6h = ipv6_hdr(skb); |
| ip6_flow_hdr(ip6h, prio, htonl(0)); |
| ip6h->payload_len = htons(skb->len); |
| ip6h->nexthdr = proto; |
| ip6h->hop_limit = ttl; |
| ip6h->daddr = *daddr; |
| ip6h->saddr = *saddr; |
| ip6h->payload_len = htons(skb->len - sizeof(*ip6h)); |
| } |
| |
| static int prepare4(struct rxe_dev *rxe, struct sk_buff *skb, struct rxe_av *av) |
| { |
| struct dst_entry *dst; |
| bool xnet = false; |
| __be16 df = htons(IP_DF); |
| struct in_addr *saddr = &av->sgid_addr._sockaddr_in.sin_addr; |
| struct in_addr *daddr = &av->dgid_addr._sockaddr_in.sin_addr; |
| struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
| |
| dst = rxe_find_route4(rxe->ndev, saddr, daddr); |
| if (!dst) { |
| pr_err("Host not reachable\n"); |
| return -EHOSTUNREACH; |
| } |
| |
| if (!memcmp(saddr, daddr, sizeof(*daddr))) |
| pkt->mask |= RXE_LOOPBACK_MASK; |
| |
| prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), |
| htons(ROCE_V2_UDP_DPORT)); |
| |
| prepare_ipv4_hdr(dst, skb, saddr->s_addr, daddr->s_addr, IPPROTO_UDP, |
| av->grh.traffic_class, av->grh.hop_limit, df, xnet); |
| return 0; |
| } |
| |
| static int prepare6(struct rxe_dev *rxe, struct sk_buff *skb, struct rxe_av *av) |
| { |
| struct dst_entry *dst; |
| struct in6_addr *saddr = &av->sgid_addr._sockaddr_in6.sin6_addr; |
| struct in6_addr *daddr = &av->dgid_addr._sockaddr_in6.sin6_addr; |
| struct rxe_pkt_info *pkt = SKB_TO_PKT(skb); |
| |
| dst = rxe_find_route6(rxe->ndev, saddr, daddr); |
| if (!dst) { |
| pr_err("Host not reachable\n"); |
| return -EHOSTUNREACH; |
| } |
| |
| if (!memcmp(saddr, daddr, sizeof(*daddr))) |
| pkt->mask |= RXE_LOOPBACK_MASK; |
| |
| prepare_udp_hdr(skb, htons(RXE_ROCE_V2_SPORT), |
| htons(ROCE_V2_UDP_DPORT)); |
| |
| prepare_ipv6_hdr(dst, skb, saddr, daddr, IPPROTO_UDP, |
| av->grh.traffic_class, |
| av->grh.hop_limit); |
| return 0; |
| } |
| |
| static int prepare(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, |
| struct sk_buff *skb, u32 *crc) |
| { |
| int err = 0; |
| struct rxe_av *av = rxe_get_av(pkt); |
| |
| if (av->network_type == RDMA_NETWORK_IPV4) |
| err = prepare4(rxe, skb, av); |
| else if (av->network_type == RDMA_NETWORK_IPV6) |
| err = prepare6(rxe, skb, av); |
| |
| *crc = rxe_icrc_hdr(pkt, skb); |
| |
| return err; |
| } |
| |
| static void rxe_skb_tx_dtor(struct sk_buff *skb) |
| { |
| struct sock *sk = skb->sk; |
| struct rxe_qp *qp = sk->sk_user_data; |
| int skb_out = atomic_dec_return(&qp->skb_out); |
| |
| if (unlikely(qp->need_req_skb && |
| skb_out < RXE_INFLIGHT_SKBS_PER_QP_LOW)) |
| rxe_run_task(&qp->req.task, 1); |
| } |
| |
| static int send(struct rxe_dev *rxe, struct rxe_pkt_info *pkt, |
| struct sk_buff *skb) |
| { |
| struct sk_buff *nskb; |
| struct rxe_av *av; |
| int err; |
| |
| av = rxe_get_av(pkt); |
| |
| nskb = skb_clone(skb, GFP_ATOMIC); |
| if (!nskb) |
| return -ENOMEM; |
| |
| nskb->destructor = rxe_skb_tx_dtor; |
| nskb->sk = pkt->qp->sk->sk; |
| |
| if (av->network_type == RDMA_NETWORK_IPV4) { |
| err = ip_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); |
| } else if (av->network_type == RDMA_NETWORK_IPV6) { |
| err = ip6_local_out(dev_net(skb_dst(skb)->dev), nskb->sk, nskb); |
| } else { |
| pr_err("Unknown layer 3 protocol: %d\n", av->network_type); |
| kfree_skb(nskb); |
| return -EINVAL; |
| } |
| |
| if (unlikely(net_xmit_eval(err))) { |
| pr_debug("error sending packet: %d\n", err); |
| return -EAGAIN; |
| } |
| |
| kfree_skb(skb); |
| |
| return 0; |
| } |
| |
| static int loopback(struct sk_buff *skb) |
| { |
| return rxe_rcv(skb); |
| } |
| |
| static inline int addr_same(struct rxe_dev *rxe, struct rxe_av *av) |
| { |
| return rxe->port.port_guid == av->grh.dgid.global.interface_id; |
| } |
| |
| static struct sk_buff *init_packet(struct rxe_dev *rxe, struct rxe_av *av, |
| int paylen, struct rxe_pkt_info *pkt) |
| { |
| unsigned int hdr_len; |
| struct sk_buff *skb; |
| |
| if (av->network_type == RDMA_NETWORK_IPV4) |
| hdr_len = ETH_HLEN + sizeof(struct udphdr) + |
| sizeof(struct iphdr); |
| else |
| hdr_len = ETH_HLEN + sizeof(struct udphdr) + |
| sizeof(struct ipv6hdr); |
| |
| skb = alloc_skb(paylen + hdr_len + LL_RESERVED_SPACE(rxe->ndev), |
| GFP_ATOMIC); |
| if (unlikely(!skb)) |
| return NULL; |
| |
| skb_reserve(skb, hdr_len + LL_RESERVED_SPACE(rxe->ndev)); |
| |
| skb->dev = rxe->ndev; |
| if (av->network_type == RDMA_NETWORK_IPV4) |
| skb->protocol = htons(ETH_P_IP); |
| else |
| skb->protocol = htons(ETH_P_IPV6); |
| |
| pkt->rxe = rxe; |
| pkt->port_num = 1; |
| pkt->hdr = skb_put(skb, paylen); |
| pkt->mask |= RXE_GRH_MASK; |
| |
| memset(pkt->hdr, 0, paylen); |
| |
| return skb; |
| } |
| |
| /* |
| * this is required by rxe_cfg to match rxe devices in |
| * /sys/class/infiniband up with their underlying ethernet devices |
| */ |
| static char *parent_name(struct rxe_dev *rxe, unsigned int port_num) |
| { |
| return rxe->ndev->name; |
| } |
| |
| static enum rdma_link_layer link_layer(struct rxe_dev *rxe, |
| unsigned int port_num) |
| { |
| return IB_LINK_LAYER_ETHERNET; |
| } |
| |
| static struct rxe_ifc_ops ifc_ops = { |
| .node_guid = node_guid, |
| .port_guid = port_guid, |
| .dma_device = dma_device, |
| .mcast_add = mcast_add, |
| .mcast_delete = mcast_delete, |
| .prepare = prepare, |
| .send = send, |
| .loopback = loopback, |
| .init_packet = init_packet, |
| .parent_name = parent_name, |
| .link_layer = link_layer, |
| }; |
| |
| struct rxe_dev *rxe_net_add(struct net_device *ndev) |
| { |
| int err; |
| struct rxe_dev *rxe = NULL; |
| |
| rxe = (struct rxe_dev *)ib_alloc_device(sizeof(*rxe)); |
| if (!rxe) |
| return NULL; |
| |
| rxe->ifc_ops = &ifc_ops; |
| rxe->ndev = ndev; |
| |
| err = rxe_add(rxe, ndev->mtu); |
| if (err) { |
| ib_dealloc_device(&rxe->ib_dev); |
| return NULL; |
| } |
| |
| spin_lock_bh(&dev_list_lock); |
| list_add_tail(&rxe_dev_list, &rxe->list); |
| spin_unlock_bh(&dev_list_lock); |
| return rxe; |
| } |
| |
| void rxe_remove_all(void) |
| { |
| spin_lock_bh(&dev_list_lock); |
| while (!list_empty(&rxe_dev_list)) { |
| struct rxe_dev *rxe = |
| list_first_entry(&rxe_dev_list, struct rxe_dev, list); |
| |
| list_del(&rxe->list); |
| spin_unlock_bh(&dev_list_lock); |
| rxe_remove(rxe); |
| spin_lock_bh(&dev_list_lock); |
| } |
| spin_unlock_bh(&dev_list_lock); |
| } |
| EXPORT_SYMBOL(rxe_remove_all); |
| |
| static void rxe_port_event(struct rxe_dev *rxe, |
| enum ib_event_type event) |
| { |
| struct ib_event ev; |
| |
| ev.device = &rxe->ib_dev; |
| ev.element.port_num = 1; |
| ev.event = event; |
| |
| ib_dispatch_event(&ev); |
| } |
| |
| /* Caller must hold net_info_lock */ |
| void rxe_port_up(struct rxe_dev *rxe) |
| { |
| struct rxe_port *port; |
| |
| port = &rxe->port; |
| port->attr.state = IB_PORT_ACTIVE; |
| port->attr.phys_state = IB_PHYS_STATE_LINK_UP; |
| |
| rxe_port_event(rxe, IB_EVENT_PORT_ACTIVE); |
| pr_info("rxe: set %s active\n", rxe->ib_dev.name); |
| return; |
| } |
| |
| /* Caller must hold net_info_lock */ |
| void rxe_port_down(struct rxe_dev *rxe) |
| { |
| struct rxe_port *port; |
| |
| port = &rxe->port; |
| port->attr.state = IB_PORT_DOWN; |
| port->attr.phys_state = IB_PHYS_STATE_LINK_DOWN; |
| |
| rxe_port_event(rxe, IB_EVENT_PORT_ERR); |
| pr_info("rxe: set %s down\n", rxe->ib_dev.name); |
| return; |
| } |
| |
| static int rxe_notify(struct notifier_block *not_blk, |
| unsigned long event, |
| void *arg) |
| { |
| struct net_device *ndev = netdev_notifier_info_to_dev(arg); |
| struct rxe_dev *rxe = net_to_rxe(ndev); |
| |
| if (!rxe) |
| goto out; |
| |
| switch (event) { |
| case NETDEV_UNREGISTER: |
| list_del(&rxe->list); |
| rxe_remove(rxe); |
| break; |
| case NETDEV_UP: |
| rxe_port_up(rxe); |
| break; |
| case NETDEV_DOWN: |
| rxe_port_down(rxe); |
| break; |
| case NETDEV_CHANGEMTU: |
| pr_info("rxe: %s changed mtu to %d\n", ndev->name, ndev->mtu); |
| rxe_set_mtu(rxe, ndev->mtu); |
| break; |
| case NETDEV_REBOOT: |
| case NETDEV_CHANGE: |
| case NETDEV_GOING_DOWN: |
| case NETDEV_CHANGEADDR: |
| case NETDEV_CHANGENAME: |
| case NETDEV_FEAT_CHANGE: |
| default: |
| pr_info("rxe: ignoring netdev event = %ld for %s\n", |
| event, ndev->name); |
| break; |
| } |
| out: |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block rxe_net_notifier = { |
| .notifier_call = rxe_notify, |
| }; |
| |
| int rxe_net_init(void) |
| { |
| int err; |
| |
| spin_lock_init(&dev_list_lock); |
| |
| recv_sockets.sk6 = rxe_setup_udp_tunnel(&init_net, |
| htons(ROCE_V2_UDP_DPORT), true); |
| if (IS_ERR(recv_sockets.sk6)) { |
| recv_sockets.sk6 = NULL; |
| pr_err("rxe: Failed to create IPv6 UDP tunnel\n"); |
| return -1; |
| } |
| |
| recv_sockets.sk4 = rxe_setup_udp_tunnel(&init_net, |
| htons(ROCE_V2_UDP_DPORT), false); |
| if (IS_ERR(recv_sockets.sk4)) { |
| rxe_release_udp_tunnel(recv_sockets.sk6); |
| recv_sockets.sk4 = NULL; |
| recv_sockets.sk6 = NULL; |
| pr_err("rxe: Failed to create IPv4 UDP tunnel\n"); |
| return -1; |
| } |
| |
| err = register_netdevice_notifier(&rxe_net_notifier); |
| if (err) { |
| rxe_release_udp_tunnel(recv_sockets.sk6); |
| rxe_release_udp_tunnel(recv_sockets.sk4); |
| pr_err("rxe: Failed to rigister netdev notifier\n"); |
| } |
| |
| return err; |
| } |
| |
| void rxe_net_exit(void) |
| { |
| if (recv_sockets.sk6) |
| rxe_release_udp_tunnel(recv_sockets.sk6); |
| |
| if (recv_sockets.sk4) |
| rxe_release_udp_tunnel(recv_sockets.sk4); |
| |
| unregister_netdevice_notifier(&rxe_net_notifier); |
| } |