ba35f8588f
Processing multicast / broadcast in fast path is performance draining and having more links means more cloning and bringing performance down further. Broadcast; in particular, need to be given to all the virtual links. Earlier tricks of enabling broadcast bit for IPv4 only interfaces are not really working since it fails autoconf. Which means enabling broadcast for all the links if protocol specific hacks do not have to be added into the driver. This patch defers all (incoming as well as outgoing) multicast traffic to a work-queue leaving only the unicast traffic in the fast-path. Now if we need to apply any additional tricks to further reduce the impact of this (multicast / broadcast) type of traffic, it can be implemented while processing this work without affecting the fast-path. Signed-off-by: Mahesh Bandewar <maheshb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#ifndef __IPVLAN_H
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#define __IPVLAN_H
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/rculist.h>
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#include <linux/notifier.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/if_link.h>
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#include <linux/if_vlan.h>
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#include <linux/ip.h>
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#include <linux/inetdevice.h>
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#include <net/ip.h>
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#include <net/ip6_route.h>
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#include <net/rtnetlink.h>
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#include <net/route.h>
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#include <net/addrconf.h>
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#define IPVLAN_DRV "ipvlan"
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#define IPV_DRV_VER "0.1"
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#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
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#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
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#define IPVLAN_MAC_FILTER_BITS 8
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#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
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#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
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#define IPVLAN_QBACKLOG_LIMIT 1000
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typedef enum {
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IPVL_IPV6 = 0,
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IPVL_ICMPV6,
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IPVL_IPV4,
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IPVL_ARP,
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} ipvl_hdr_type;
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struct ipvl_pcpu_stats {
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u64 rx_pkts;
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u64 rx_bytes;
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u64 rx_mcast;
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u64 tx_pkts;
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u64 tx_bytes;
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struct u64_stats_sync syncp;
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u32 rx_errs;
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u32 tx_drps;
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};
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struct ipvl_port;
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struct ipvl_dev {
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struct net_device *dev;
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struct list_head pnode;
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struct ipvl_port *port;
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struct net_device *phy_dev;
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struct list_head addrs;
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int ipv4cnt;
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int ipv6cnt;
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struct ipvl_pcpu_stats __percpu *pcpu_stats;
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DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
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netdev_features_t sfeatures;
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u32 msg_enable;
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u16 mtu_adj;
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};
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struct ipvl_addr {
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struct ipvl_dev *master; /* Back pointer to master */
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union {
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struct in6_addr ip6; /* IPv6 address on logical interface */
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struct in_addr ip4; /* IPv4 address on logical interface */
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} ipu;
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#define ip6addr ipu.ip6
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#define ip4addr ipu.ip4
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struct hlist_node hlnode; /* Hash-table linkage */
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struct list_head anode; /* logical-interface linkage */
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struct rcu_head rcu;
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ipvl_hdr_type atype;
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};
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struct ipvl_port {
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struct net_device *dev;
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struct hlist_head hlhead[IPVLAN_HASH_SIZE];
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struct list_head ipvlans;
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struct rcu_head rcu;
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struct work_struct wq;
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struct sk_buff_head backlog;
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int count;
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u16 mode;
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};
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static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
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{
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return rcu_dereference(d->rx_handler_data);
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}
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static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
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{
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return rtnl_dereference(d->rx_handler_data);
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}
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void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev);
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void ipvlan_set_port_mode(struct ipvl_port *port, u32 nval);
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void ipvlan_init_secret(void);
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unsigned int ipvlan_mac_hash(const unsigned char *addr);
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rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
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void ipvlan_process_multicast(struct work_struct *work);
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int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
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void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
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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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bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
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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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void ipvlan_ht_addr_del(struct ipvl_addr *addr, bool sync);
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#endif /* __IPVLAN_H */
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