43b9e12740
In preparation for hardware offloading of ipmr/ip6mr we need an interface that allows to check (and later update) the age of entries. Relying on stats alone can show activity but not actual age of the entry, furthermore when there're tens of thousands of entries a lot of the hardware implementations only support "hit" bits which are cleared on read to denote that the entry was active and shouldn't be aged out, these can then be naturally translated into age timestamp and will be compatible with the software forwarding age. Using a lastuse entry doesn't affect performance because the members in that cache line are written to along with the age. Since all new users are encouraged to use ipmr via netlink, this is exported via the RTA_EXPIRES attribute. Also do a minor local variable declaration style adjustment - arrange them longest to shortest. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> CC: Roopa Prabhu <roopa@cumulusnetworks.com> CC: Shrijeet Mukherjee <shm@cumulusnetworks.com> CC: Satish Ashok <sashok@cumulusnetworks.com> CC: Donald Sharp <sharpd@cumulusnetworks.com> CC: David S. Miller <davem@davemloft.net> CC: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> CC: James Morris <jmorris@namei.org> CC: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> CC: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
#ifndef __LINUX_MROUTE6_H
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#define __LINUX_MROUTE6_H
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#include <linux/pim.h>
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#include <linux/skbuff.h> /* for struct sk_buff_head */
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#include <net/net_namespace.h>
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#include <uapi/linux/mroute6.h>
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#ifdef CONFIG_IPV6_MROUTE
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static inline int ip6_mroute_opt(int opt)
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{
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return (opt >= MRT6_BASE) && (opt <= MRT6_MAX);
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}
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#else
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static inline int ip6_mroute_opt(int opt)
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{
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return 0;
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}
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#endif
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struct sock;
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#ifdef CONFIG_IPV6_MROUTE
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extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
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extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
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extern int ip6_mr_input(struct sk_buff *skb);
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extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
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extern int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg);
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extern int ip6_mr_init(void);
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extern void ip6_mr_cleanup(void);
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#else
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static inline
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int ip6_mroute_setsockopt(struct sock *sock,
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int optname, char __user *optval, unsigned int optlen)
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{
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return -ENOPROTOOPT;
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}
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static inline
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int ip6_mroute_getsockopt(struct sock *sock,
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int optname, char __user *optval, int __user *optlen)
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{
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return -ENOPROTOOPT;
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}
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static inline
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int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
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{
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return -ENOIOCTLCMD;
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}
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static inline int ip6_mr_init(void)
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{
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return 0;
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}
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static inline void ip6_mr_cleanup(void)
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{
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return;
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}
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#endif
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struct mif_device {
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struct net_device *dev; /* Device we are using */
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unsigned long bytes_in,bytes_out;
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unsigned long pkt_in,pkt_out; /* Statistics */
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unsigned long rate_limit; /* Traffic shaping (NI) */
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unsigned char threshold; /* TTL threshold */
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unsigned short flags; /* Control flags */
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int link; /* Physical interface index */
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};
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#define VIFF_STATIC 0x8000
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struct mfc6_cache {
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struct list_head list;
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struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
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struct in6_addr mf6c_origin; /* Source of packet */
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mifi_t mf6c_parent; /* Source interface */
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int mfc_flags; /* Flags on line */
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union {
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struct {
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unsigned long expires;
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struct sk_buff_head unresolved; /* Unresolved buffers */
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} unres;
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struct {
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unsigned long last_assert;
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int minvif;
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int maxvif;
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unsigned long bytes;
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unsigned long pkt;
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unsigned long wrong_if;
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unsigned long lastuse;
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unsigned char ttls[MAXMIFS]; /* TTL thresholds */
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} res;
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} mfc_un;
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};
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#define MFC_STATIC 1
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#define MFC_NOTIFY 2
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#define MFC6_LINES 64
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#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
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(__force u32)(a)->s6_addr32[1] ^ \
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(__force u32)(a)->s6_addr32[2] ^ \
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(__force u32)(a)->s6_addr32[3] ^ \
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(__force u32)(g)->s6_addr32[0] ^ \
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(__force u32)(g)->s6_addr32[1] ^ \
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(__force u32)(g)->s6_addr32[2] ^ \
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(__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
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#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
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struct rtmsg;
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extern int ip6mr_get_route(struct net *net, struct sk_buff *skb,
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struct rtmsg *rtm, int nowait);
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#ifdef CONFIG_IPV6_MROUTE
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extern struct sock *mroute6_socket(struct net *net, struct sk_buff *skb);
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extern int ip6mr_sk_done(struct sock *sk);
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#else
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static inline struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
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{
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return NULL;
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}
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static inline int ip6mr_sk_done(struct sock *sk)
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{
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return 0;
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}
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#endif
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#endif
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