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754 lines
17 KiB
754 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* Copyright (c) 2014 Mahesh Bandewar <[email protected]> |
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*/ |
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|
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#include "ipvlan.h" |
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|
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static u32 ipvlan_jhash_secret __read_mostly; |
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|
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void ipvlan_init_secret(void) |
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{ |
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net_get_random_once(&ipvlan_jhash_secret, sizeof(ipvlan_jhash_secret)); |
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} |
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void ipvlan_count_rx(const struct ipvl_dev *ipvlan, |
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unsigned int len, bool success, bool mcast) |
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{ |
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if (likely(success)) { |
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struct ipvl_pcpu_stats *pcptr; |
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pcptr = this_cpu_ptr(ipvlan->pcpu_stats); |
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u64_stats_update_begin(&pcptr->syncp); |
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pcptr->rx_pkts++; |
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pcptr->rx_bytes += len; |
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if (mcast) |
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pcptr->rx_mcast++; |
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u64_stats_update_end(&pcptr->syncp); |
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} else { |
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this_cpu_inc(ipvlan->pcpu_stats->rx_errs); |
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} |
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} |
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EXPORT_SYMBOL_GPL(ipvlan_count_rx); |
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#if IS_ENABLED(CONFIG_IPV6) |
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static u8 ipvlan_get_v6_hash(const void *iaddr) |
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{ |
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const struct in6_addr *ip6_addr = iaddr; |
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return __ipv6_addr_jhash(ip6_addr, ipvlan_jhash_secret) & |
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IPVLAN_HASH_MASK; |
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} |
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#else |
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static u8 ipvlan_get_v6_hash(const void *iaddr) |
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{ |
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return 0; |
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} |
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#endif |
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static u8 ipvlan_get_v4_hash(const void *iaddr) |
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{ |
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const struct in_addr *ip4_addr = iaddr; |
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return jhash_1word(ip4_addr->s_addr, ipvlan_jhash_secret) & |
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IPVLAN_HASH_MASK; |
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} |
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static bool addr_equal(bool is_v6, struct ipvl_addr *addr, const void *iaddr) |
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{ |
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if (!is_v6 && addr->atype == IPVL_IPV4) { |
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struct in_addr *i4addr = (struct in_addr *)iaddr; |
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return addr->ip4addr.s_addr == i4addr->s_addr; |
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#if IS_ENABLED(CONFIG_IPV6) |
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} else if (is_v6 && addr->atype == IPVL_IPV6) { |
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struct in6_addr *i6addr = (struct in6_addr *)iaddr; |
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return ipv6_addr_equal(&addr->ip6addr, i6addr); |
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#endif |
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} |
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return false; |
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} |
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static struct ipvl_addr *ipvlan_ht_addr_lookup(const struct ipvl_port *port, |
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const void *iaddr, bool is_v6) |
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{ |
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struct ipvl_addr *addr; |
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u8 hash; |
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hash = is_v6 ? ipvlan_get_v6_hash(iaddr) : |
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ipvlan_get_v4_hash(iaddr); |
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hlist_for_each_entry_rcu(addr, &port->hlhead[hash], hlnode) |
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if (addr_equal(is_v6, addr, iaddr)) |
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return addr; |
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return NULL; |
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} |
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void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr) |
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{ |
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struct ipvl_port *port = ipvlan->port; |
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u8 hash; |
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hash = (addr->atype == IPVL_IPV6) ? |
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ipvlan_get_v6_hash(&addr->ip6addr) : |
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ipvlan_get_v4_hash(&addr->ip4addr); |
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if (hlist_unhashed(&addr->hlnode)) |
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hlist_add_head_rcu(&addr->hlnode, &port->hlhead[hash]); |
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} |
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void ipvlan_ht_addr_del(struct ipvl_addr *addr) |
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{ |
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hlist_del_init_rcu(&addr->hlnode); |
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} |
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struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan, |
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const void *iaddr, bool is_v6) |
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{ |
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struct ipvl_addr *addr, *ret = NULL; |
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rcu_read_lock(); |
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list_for_each_entry_rcu(addr, &ipvlan->addrs, anode) { |
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if (addr_equal(is_v6, addr, iaddr)) { |
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ret = addr; |
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break; |
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} |
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} |
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rcu_read_unlock(); |
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return ret; |
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} |
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bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6) |
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{ |
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struct ipvl_dev *ipvlan; |
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bool ret = false; |
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rcu_read_lock(); |
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list_for_each_entry_rcu(ipvlan, &port->ipvlans, pnode) { |
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if (ipvlan_find_addr(ipvlan, iaddr, is_v6)) { |
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ret = true; |
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break; |
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} |
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} |
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rcu_read_unlock(); |
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return ret; |
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} |
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void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type) |
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{ |
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void *lyr3h = NULL; |
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switch (skb->protocol) { |
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case htons(ETH_P_ARP): { |
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struct arphdr *arph; |
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if (unlikely(!pskb_may_pull(skb, arp_hdr_len(port->dev)))) |
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return NULL; |
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arph = arp_hdr(skb); |
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*type = IPVL_ARP; |
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lyr3h = arph; |
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break; |
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} |
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case htons(ETH_P_IP): { |
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u32 pktlen; |
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struct iphdr *ip4h; |
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if (unlikely(!pskb_may_pull(skb, sizeof(*ip4h)))) |
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return NULL; |
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ip4h = ip_hdr(skb); |
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pktlen = ntohs(ip4h->tot_len); |
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if (ip4h->ihl < 5 || ip4h->version != 4) |
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return NULL; |
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if (skb->len < pktlen || pktlen < (ip4h->ihl * 4)) |
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return NULL; |
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*type = IPVL_IPV4; |
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lyr3h = ip4h; |
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break; |
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} |
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#if IS_ENABLED(CONFIG_IPV6) |
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case htons(ETH_P_IPV6): { |
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struct ipv6hdr *ip6h; |
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if (unlikely(!pskb_may_pull(skb, sizeof(*ip6h)))) |
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return NULL; |
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ip6h = ipv6_hdr(skb); |
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if (ip6h->version != 6) |
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return NULL; |
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*type = IPVL_IPV6; |
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lyr3h = ip6h; |
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/* Only Neighbour Solicitation pkts need different treatment */ |
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if (ipv6_addr_any(&ip6h->saddr) && |
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ip6h->nexthdr == NEXTHDR_ICMP) { |
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struct icmp6hdr *icmph; |
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if (unlikely(!pskb_may_pull(skb, sizeof(*ip6h) + sizeof(*icmph)))) |
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return NULL; |
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ip6h = ipv6_hdr(skb); |
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icmph = (struct icmp6hdr *)(ip6h + 1); |
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if (icmph->icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { |
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/* Need to access the ipv6 address in body */ |
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if (unlikely(!pskb_may_pull(skb, sizeof(*ip6h) + sizeof(*icmph) |
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+ sizeof(struct in6_addr)))) |
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return NULL; |
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ip6h = ipv6_hdr(skb); |
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icmph = (struct icmp6hdr *)(ip6h + 1); |
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} |
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*type = IPVL_ICMPV6; |
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lyr3h = icmph; |
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} |
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break; |
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} |
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#endif |
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default: |
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return NULL; |
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} |
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return lyr3h; |
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} |
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unsigned int ipvlan_mac_hash(const unsigned char *addr) |
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{ |
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u32 hash = jhash_1word(__get_unaligned_cpu32(addr+2), |
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ipvlan_jhash_secret); |
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return hash & IPVLAN_MAC_FILTER_MASK; |
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} |
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void ipvlan_process_multicast(struct work_struct *work) |
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{ |
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struct ipvl_port *port = container_of(work, struct ipvl_port, wq); |
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struct ethhdr *ethh; |
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struct ipvl_dev *ipvlan; |
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struct sk_buff *skb, *nskb; |
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struct sk_buff_head list; |
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unsigned int len; |
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unsigned int mac_hash; |
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int ret; |
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u8 pkt_type; |
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bool tx_pkt; |
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__skb_queue_head_init(&list); |
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spin_lock_bh(&port->backlog.lock); |
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skb_queue_splice_tail_init(&port->backlog, &list); |
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spin_unlock_bh(&port->backlog.lock); |
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while ((skb = __skb_dequeue(&list)) != NULL) { |
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struct net_device *dev = skb->dev; |
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bool consumed = false; |
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ethh = eth_hdr(skb); |
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tx_pkt = IPVL_SKB_CB(skb)->tx_pkt; |
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mac_hash = ipvlan_mac_hash(ethh->h_dest); |
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if (ether_addr_equal(ethh->h_dest, port->dev->broadcast)) |
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pkt_type = PACKET_BROADCAST; |
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else |
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pkt_type = PACKET_MULTICAST; |
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rcu_read_lock(); |
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list_for_each_entry_rcu(ipvlan, &port->ipvlans, pnode) { |
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if (tx_pkt && (ipvlan->dev == skb->dev)) |
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continue; |
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if (!test_bit(mac_hash, ipvlan->mac_filters)) |
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continue; |
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if (!(ipvlan->dev->flags & IFF_UP)) |
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continue; |
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ret = NET_RX_DROP; |
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len = skb->len + ETH_HLEN; |
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nskb = skb_clone(skb, GFP_ATOMIC); |
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local_bh_disable(); |
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if (nskb) { |
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consumed = true; |
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nskb->pkt_type = pkt_type; |
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nskb->dev = ipvlan->dev; |
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if (tx_pkt) |
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ret = dev_forward_skb(ipvlan->dev, nskb); |
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else |
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ret = netif_rx(nskb); |
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} |
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ipvlan_count_rx(ipvlan, len, ret == NET_RX_SUCCESS, true); |
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local_bh_enable(); |
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} |
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rcu_read_unlock(); |
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if (tx_pkt) { |
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/* If the packet originated here, send it out. */ |
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skb->dev = port->dev; |
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skb->pkt_type = pkt_type; |
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dev_queue_xmit(skb); |
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} else { |
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if (consumed) |
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consume_skb(skb); |
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else |
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kfree_skb(skb); |
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} |
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if (dev) |
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dev_put(dev); |
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cond_resched(); |
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} |
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} |
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static void ipvlan_skb_crossing_ns(struct sk_buff *skb, struct net_device *dev) |
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{ |
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bool xnet = true; |
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if (dev) |
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xnet = !net_eq(dev_net(skb->dev), dev_net(dev)); |
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skb_scrub_packet(skb, xnet); |
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if (dev) |
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skb->dev = dev; |
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} |
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static int ipvlan_rcv_frame(struct ipvl_addr *addr, struct sk_buff **pskb, |
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bool local) |
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{ |
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struct ipvl_dev *ipvlan = addr->master; |
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struct net_device *dev = ipvlan->dev; |
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unsigned int len; |
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rx_handler_result_t ret = RX_HANDLER_CONSUMED; |
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bool success = false; |
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struct sk_buff *skb = *pskb; |
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len = skb->len + ETH_HLEN; |
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/* Only packets exchanged between two local slaves need to have |
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* device-up check as well as skb-share check. |
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*/ |
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if (local) { |
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if (unlikely(!(dev->flags & IFF_UP))) { |
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kfree_skb(skb); |
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goto out; |
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} |
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skb = skb_share_check(skb, GFP_ATOMIC); |
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if (!skb) |
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goto out; |
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*pskb = skb; |
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} |
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if (local) { |
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skb->pkt_type = PACKET_HOST; |
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if (dev_forward_skb(ipvlan->dev, skb) == NET_RX_SUCCESS) |
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success = true; |
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} else { |
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skb->dev = dev; |
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ret = RX_HANDLER_ANOTHER; |
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success = true; |
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} |
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out: |
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ipvlan_count_rx(ipvlan, len, success, false); |
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return ret; |
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} |
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struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h, |
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int addr_type, bool use_dest) |
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{ |
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struct ipvl_addr *addr = NULL; |
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switch (addr_type) { |
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#if IS_ENABLED(CONFIG_IPV6) |
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case IPVL_IPV6: { |
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struct ipv6hdr *ip6h; |
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struct in6_addr *i6addr; |
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ip6h = (struct ipv6hdr *)lyr3h; |
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i6addr = use_dest ? &ip6h->daddr : &ip6h->saddr; |
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addr = ipvlan_ht_addr_lookup(port, i6addr, true); |
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break; |
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} |
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case IPVL_ICMPV6: { |
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struct nd_msg *ndmh; |
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struct in6_addr *i6addr; |
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/* Make sure that the NeighborSolicitation ICMPv6 packets |
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* are handled to avoid DAD issue. |
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*/ |
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ndmh = (struct nd_msg *)lyr3h; |
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if (ndmh->icmph.icmp6_type == NDISC_NEIGHBOUR_SOLICITATION) { |
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i6addr = &ndmh->target; |
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addr = ipvlan_ht_addr_lookup(port, i6addr, true); |
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} |
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break; |
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} |
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#endif |
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case IPVL_IPV4: { |
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struct iphdr *ip4h; |
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__be32 *i4addr; |
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ip4h = (struct iphdr *)lyr3h; |
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i4addr = use_dest ? &ip4h->daddr : &ip4h->saddr; |
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addr = ipvlan_ht_addr_lookup(port, i4addr, false); |
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break; |
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} |
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case IPVL_ARP: { |
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struct arphdr *arph; |
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unsigned char *arp_ptr; |
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__be32 dip; |
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arph = (struct arphdr *)lyr3h; |
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arp_ptr = (unsigned char *)(arph + 1); |
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if (use_dest) |
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arp_ptr += (2 * port->dev->addr_len) + 4; |
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else |
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arp_ptr += port->dev->addr_len; |
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memcpy(&dip, arp_ptr, 4); |
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addr = ipvlan_ht_addr_lookup(port, &dip, false); |
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break; |
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} |
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} |
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return addr; |
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} |
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static int ipvlan_process_v4_outbound(struct sk_buff *skb) |
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{ |
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const struct iphdr *ip4h = ip_hdr(skb); |
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struct net_device *dev = skb->dev; |
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struct net *net = dev_net(dev); |
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struct rtable *rt; |
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int err, ret = NET_XMIT_DROP; |
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struct flowi4 fl4 = { |
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.flowi4_oif = dev->ifindex, |
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.flowi4_tos = RT_TOS(ip4h->tos), |
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.flowi4_flags = FLOWI_FLAG_ANYSRC, |
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.flowi4_mark = skb->mark, |
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.daddr = ip4h->daddr, |
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.saddr = ip4h->saddr, |
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}; |
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rt = ip_route_output_flow(net, &fl4, NULL); |
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if (IS_ERR(rt)) |
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goto err; |
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if (rt->rt_type != RTN_UNICAST && rt->rt_type != RTN_LOCAL) { |
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ip_rt_put(rt); |
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goto err; |
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} |
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skb_dst_set(skb, &rt->dst); |
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err = ip_local_out(net, skb->sk, skb); |
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if (unlikely(net_xmit_eval(err))) |
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dev->stats.tx_errors++; |
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else |
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ret = NET_XMIT_SUCCESS; |
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goto out; |
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err: |
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dev->stats.tx_errors++; |
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kfree_skb(skb); |
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out: |
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return ret; |
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} |
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#if IS_ENABLED(CONFIG_IPV6) |
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static int ipvlan_process_v6_outbound(struct sk_buff *skb) |
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{ |
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const struct ipv6hdr *ip6h = ipv6_hdr(skb); |
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struct net_device *dev = skb->dev; |
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struct net *net = dev_net(dev); |
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struct dst_entry *dst; |
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int err, ret = NET_XMIT_DROP; |
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struct flowi6 fl6 = { |
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.flowi6_oif = dev->ifindex, |
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.daddr = ip6h->daddr, |
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.saddr = ip6h->saddr, |
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.flowi6_flags = FLOWI_FLAG_ANYSRC, |
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.flowlabel = ip6_flowinfo(ip6h), |
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.flowi6_mark = skb->mark, |
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.flowi6_proto = ip6h->nexthdr, |
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}; |
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dst = ip6_route_output(net, NULL, &fl6); |
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if (dst->error) { |
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ret = dst->error; |
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dst_release(dst); |
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goto err; |
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} |
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skb_dst_set(skb, dst); |
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err = ip6_local_out(net, skb->sk, skb); |
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if (unlikely(net_xmit_eval(err))) |
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dev->stats.tx_errors++; |
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else |
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ret = NET_XMIT_SUCCESS; |
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goto out; |
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err: |
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dev->stats.tx_errors++; |
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kfree_skb(skb); |
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out: |
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return ret; |
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} |
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#else |
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static int ipvlan_process_v6_outbound(struct sk_buff *skb) |
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{ |
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return NET_XMIT_DROP; |
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} |
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#endif |
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static int ipvlan_process_outbound(struct sk_buff *skb) |
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{ |
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struct ethhdr *ethh = eth_hdr(skb); |
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int ret = NET_XMIT_DROP; |
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|
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/* The ipvlan is a pseudo-L2 device, so the packets that we receive |
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* will have L2; which need to discarded and processed further |
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* in the net-ns of the main-device. |
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*/ |
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if (skb_mac_header_was_set(skb)) { |
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/* In this mode we dont care about |
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* multicast and broadcast traffic */ |
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if (is_multicast_ether_addr(ethh->h_dest)) { |
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pr_debug_ratelimited( |
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"Dropped {multi|broad}cast of type=[%x]\n", |
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ntohs(skb->protocol)); |
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kfree_skb(skb); |
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goto out; |
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} |
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|
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skb_pull(skb, sizeof(*ethh)); |
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skb->mac_header = (typeof(skb->mac_header))~0U; |
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skb_reset_network_header(skb); |
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} |
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|
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if (skb->protocol == htons(ETH_P_IPV6)) |
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ret = ipvlan_process_v6_outbound(skb); |
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else if (skb->protocol == htons(ETH_P_IP)) |
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ret = ipvlan_process_v4_outbound(skb); |
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else { |
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pr_warn_ratelimited("Dropped outbound packet type=%x\n", |
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ntohs(skb->protocol)); |
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kfree_skb(skb); |
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} |
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out: |
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return ret; |
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} |
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|
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static void ipvlan_multicast_enqueue(struct ipvl_port *port, |
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struct sk_buff *skb, bool tx_pkt) |
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{ |
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if (skb->protocol == htons(ETH_P_PAUSE)) { |
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kfree_skb(skb); |
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return; |
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} |
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|
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/* Record that the deferred packet is from TX or RX path. By |
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* looking at mac-addresses on packet will lead to erronus decisions. |
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* (This would be true for a loopback-mode on master device or a |
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* hair-pin mode of the switch.) |
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*/ |
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IPVL_SKB_CB(skb)->tx_pkt = tx_pkt; |
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|
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spin_lock(&port->backlog.lock); |
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if (skb_queue_len(&port->backlog) < IPVLAN_QBACKLOG_LIMIT) { |
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if (skb->dev) |
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dev_hold(skb->dev); |
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__skb_queue_tail(&port->backlog, skb); |
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spin_unlock(&port->backlog.lock); |
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schedule_work(&port->wq); |
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} else { |
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spin_unlock(&port->backlog.lock); |
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atomic_long_inc(&skb->dev->rx_dropped); |
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kfree_skb(skb); |
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} |
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} |
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|
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static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev) |
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{ |
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const struct ipvl_dev *ipvlan = netdev_priv(dev); |
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void *lyr3h; |
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struct ipvl_addr *addr; |
|
int addr_type; |
|
|
|
lyr3h = ipvlan_get_L3_hdr(ipvlan->port, skb, &addr_type); |
|
if (!lyr3h) |
|
goto out; |
|
|
|
if (!ipvlan_is_vepa(ipvlan->port)) { |
|
addr = ipvlan_addr_lookup(ipvlan->port, lyr3h, addr_type, true); |
|
if (addr) { |
|
if (ipvlan_is_private(ipvlan->port)) { |
|
consume_skb(skb); |
|
return NET_XMIT_DROP; |
|
} |
|
return ipvlan_rcv_frame(addr, &skb, true); |
|
} |
|
} |
|
out: |
|
ipvlan_skb_crossing_ns(skb, ipvlan->phy_dev); |
|
return ipvlan_process_outbound(skb); |
|
} |
|
|
|
static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
const struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ethhdr *eth = eth_hdr(skb); |
|
struct ipvl_addr *addr; |
|
void *lyr3h; |
|
int addr_type; |
|
|
|
if (!ipvlan_is_vepa(ipvlan->port) && |
|
ether_addr_equal(eth->h_dest, eth->h_source)) { |
|
lyr3h = ipvlan_get_L3_hdr(ipvlan->port, skb, &addr_type); |
|
if (lyr3h) { |
|
addr = ipvlan_addr_lookup(ipvlan->port, lyr3h, addr_type, true); |
|
if (addr) { |
|
if (ipvlan_is_private(ipvlan->port)) { |
|
consume_skb(skb); |
|
return NET_XMIT_DROP; |
|
} |
|
return ipvlan_rcv_frame(addr, &skb, true); |
|
} |
|
} |
|
skb = skb_share_check(skb, GFP_ATOMIC); |
|
if (!skb) |
|
return NET_XMIT_DROP; |
|
|
|
/* Packet definitely does not belong to any of the |
|
* virtual devices, but the dest is local. So forward |
|
* the skb for the main-dev. At the RX side we just return |
|
* RX_PASS for it to be processed further on the stack. |
|
*/ |
|
return dev_forward_skb(ipvlan->phy_dev, skb); |
|
|
|
} else if (is_multicast_ether_addr(eth->h_dest)) { |
|
ipvlan_skb_crossing_ns(skb, NULL); |
|
ipvlan_multicast_enqueue(ipvlan->port, skb, true); |
|
return NET_XMIT_SUCCESS; |
|
} |
|
|
|
skb->dev = ipvlan->phy_dev; |
|
return dev_queue_xmit(skb); |
|
} |
|
|
|
int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
|
{ |
|
struct ipvl_dev *ipvlan = netdev_priv(dev); |
|
struct ipvl_port *port = ipvlan_port_get_rcu_bh(ipvlan->phy_dev); |
|
|
|
if (!port) |
|
goto out; |
|
|
|
if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr)))) |
|
goto out; |
|
|
|
switch(port->mode) { |
|
case IPVLAN_MODE_L2: |
|
return ipvlan_xmit_mode_l2(skb, dev); |
|
case IPVLAN_MODE_L3: |
|
#ifdef CONFIG_IPVLAN_L3S |
|
case IPVLAN_MODE_L3S: |
|
#endif |
|
return ipvlan_xmit_mode_l3(skb, dev); |
|
} |
|
|
|
/* Should not reach here */ |
|
WARN_ONCE(true, "%s called for mode = [%x]\n", __func__, port->mode); |
|
out: |
|
kfree_skb(skb); |
|
return NET_XMIT_DROP; |
|
} |
|
|
|
static bool ipvlan_external_frame(struct sk_buff *skb, struct ipvl_port *port) |
|
{ |
|
struct ethhdr *eth = eth_hdr(skb); |
|
struct ipvl_addr *addr; |
|
void *lyr3h; |
|
int addr_type; |
|
|
|
if (ether_addr_equal(eth->h_source, skb->dev->dev_addr)) { |
|
lyr3h = ipvlan_get_L3_hdr(port, skb, &addr_type); |
|
if (!lyr3h) |
|
return true; |
|
|
|
addr = ipvlan_addr_lookup(port, lyr3h, addr_type, false); |
|
if (addr) |
|
return false; |
|
} |
|
|
|
return true; |
|
} |
|
|
|
static rx_handler_result_t ipvlan_handle_mode_l3(struct sk_buff **pskb, |
|
struct ipvl_port *port) |
|
{ |
|
void *lyr3h; |
|
int addr_type; |
|
struct ipvl_addr *addr; |
|
struct sk_buff *skb = *pskb; |
|
rx_handler_result_t ret = RX_HANDLER_PASS; |
|
|
|
lyr3h = ipvlan_get_L3_hdr(port, skb, &addr_type); |
|
if (!lyr3h) |
|
goto out; |
|
|
|
addr = ipvlan_addr_lookup(port, lyr3h, addr_type, true); |
|
if (addr) |
|
ret = ipvlan_rcv_frame(addr, pskb, false); |
|
|
|
out: |
|
return ret; |
|
} |
|
|
|
static rx_handler_result_t ipvlan_handle_mode_l2(struct sk_buff **pskb, |
|
struct ipvl_port *port) |
|
{ |
|
struct sk_buff *skb = *pskb; |
|
struct ethhdr *eth = eth_hdr(skb); |
|
rx_handler_result_t ret = RX_HANDLER_PASS; |
|
|
|
if (is_multicast_ether_addr(eth->h_dest)) { |
|
if (ipvlan_external_frame(skb, port)) { |
|
struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); |
|
|
|
/* External frames are queued for device local |
|
* distribution, but a copy is given to master |
|
* straight away to avoid sending duplicates later |
|
* when work-queue processes this frame. This is |
|
* achieved by returning RX_HANDLER_PASS. |
|
*/ |
|
if (nskb) { |
|
ipvlan_skb_crossing_ns(nskb, NULL); |
|
ipvlan_multicast_enqueue(port, nskb, false); |
|
} |
|
} |
|
} else { |
|
/* Perform like l3 mode for non-multicast packet */ |
|
ret = ipvlan_handle_mode_l3(pskb, port); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb) |
|
{ |
|
struct sk_buff *skb = *pskb; |
|
struct ipvl_port *port = ipvlan_port_get_rcu(skb->dev); |
|
|
|
if (!port) |
|
return RX_HANDLER_PASS; |
|
|
|
switch (port->mode) { |
|
case IPVLAN_MODE_L2: |
|
return ipvlan_handle_mode_l2(pskb, port); |
|
case IPVLAN_MODE_L3: |
|
return ipvlan_handle_mode_l3(pskb, port); |
|
#ifdef CONFIG_IPVLAN_L3S |
|
case IPVLAN_MODE_L3S: |
|
return RX_HANDLER_PASS; |
|
#endif |
|
} |
|
|
|
/* Should not reach here */ |
|
WARN_ONCE(true, "%s called for mode = [%x]\n", __func__, port->mode); |
|
kfree_skb(skb); |
|
return RX_HANDLER_CONSUMED; |
|
}
|
|
|