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0d51aa80a9
Essentially netlink at the moment always reports a pid and sequence of 0 always for v6 route activities. To understand the repurcassions of this look at: http://lists.quagga.net/pipermail/quagga-dev/2005-June/003507.html While fixing this, i took the liberty to resolve the outstanding issue of IPV6 routes inserted via ioctls to have the correct pids as well. This patch tries to behave as close as possible to the v4 routes i.e maintains whatever PID the socket issuing the command owns as opposed to the process. That made the patch a little bulky. I have tested against both netlink derived utility to add/del routes as well as ioctl derived one. The Quagga folks have tested against quagga. This fixes the problem and so far hasnt been detected to introduce any new issues. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
188 lines
4 KiB
C
188 lines
4 KiB
C
/*
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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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
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _IP6_FIB_H
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#define _IP6_FIB_H
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#ifdef __KERNEL__
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#include <linux/ipv6_route.h>
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#include <net/dst.h>
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#include <net/flow.h>
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#include <linux/rtnetlink.h>
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#include <linux/spinlock.h>
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struct rt6_info;
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struct fib6_node
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{
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struct fib6_node *parent;
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struct fib6_node *left;
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struct fib6_node *right;
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struct fib6_node *subtree;
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struct rt6_info *leaf;
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__u16 fn_bit; /* bit key */
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__u16 fn_flags;
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__u32 fn_sernum;
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};
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/*
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* routing information
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*
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*/
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struct rt6key
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{
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struct in6_addr addr;
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int plen;
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};
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struct rt6_info
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{
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union {
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struct dst_entry dst;
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struct rt6_info *next;
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} u;
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struct inet6_dev *rt6i_idev;
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#define rt6i_dev u.dst.dev
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#define rt6i_nexthop u.dst.neighbour
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#define rt6i_expires u.dst.expires
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struct fib6_node *rt6i_node;
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struct in6_addr rt6i_gateway;
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u32 rt6i_flags;
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u32 rt6i_metric;
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atomic_t rt6i_ref;
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struct rt6key rt6i_dst;
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struct rt6key rt6i_src;
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u8 rt6i_protocol;
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};
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struct fib6_walker_t
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{
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struct fib6_walker_t *prev, *next;
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struct fib6_node *root, *node;
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struct rt6_info *leaf;
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unsigned char state;
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unsigned char prune;
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int (*func)(struct fib6_walker_t *);
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void *args;
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};
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extern struct fib6_walker_t fib6_walker_list;
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extern rwlock_t fib6_walker_lock;
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static inline void fib6_walker_link(struct fib6_walker_t *w)
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{
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write_lock_bh(&fib6_walker_lock);
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w->next = fib6_walker_list.next;
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w->prev = &fib6_walker_list;
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w->next->prev = w;
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w->prev->next = w;
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write_unlock_bh(&fib6_walker_lock);
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}
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static inline void fib6_walker_unlink(struct fib6_walker_t *w)
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{
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write_lock_bh(&fib6_walker_lock);
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w->next->prev = w->prev;
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w->prev->next = w->next;
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w->prev = w->next = w;
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write_unlock_bh(&fib6_walker_lock);
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}
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struct rt6_statistics {
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__u32 fib_nodes;
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__u32 fib_route_nodes;
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__u32 fib_rt_alloc; /* permanent routes */
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__u32 fib_rt_entries; /* rt entries in table */
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__u32 fib_rt_cache; /* cache routes */
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__u32 fib_discarded_routes;
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};
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#define RTN_TL_ROOT 0x0001
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#define RTN_ROOT 0x0002 /* tree root node */
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#define RTN_RTINFO 0x0004 /* node with valid routing info */
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/*
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* priority levels (or metrics)
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*
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*/
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#define RTPRI_FIREWALL 8 /* Firewall control information */
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#define RTPRI_FLOW 16 /* Flow based forwarding rules */
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#define RTPRI_KERN_CTL 32 /* Kernel control routes */
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#define RTPRI_USER_MIN 256 /* Mimimum user priority */
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#define RTPRI_USER_MAX 1024 /* Maximum user priority */
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#define RTPRI_KERN_DFLT 4096 /* Kernel default routes */
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#define MAX_FLOW_BACKTRACE 32
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typedef void (*f_pnode)(struct fib6_node *fn, void *);
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extern struct fib6_node ip6_routing_table;
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/*
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* exported functions
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*/
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extern struct fib6_node *fib6_lookup(struct fib6_node *root,
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struct in6_addr *daddr,
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struct in6_addr *saddr);
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struct fib6_node *fib6_locate(struct fib6_node *root,
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struct in6_addr *daddr, int dst_len,
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struct in6_addr *saddr, int src_len);
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extern void fib6_clean_tree(struct fib6_node *root,
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int (*func)(struct rt6_info *, void *arg),
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int prune, void *arg);
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extern int fib6_walk(struct fib6_walker_t *w);
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extern int fib6_walk_continue(struct fib6_walker_t *w);
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extern int fib6_add(struct fib6_node *root,
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struct rt6_info *rt,
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struct nlmsghdr *nlh,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern int fib6_del(struct rt6_info *rt,
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struct nlmsghdr *nlh,
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void *rtattr,
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struct netlink_skb_parms *req);
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extern void inet6_rt_notify(int event, struct rt6_info *rt,
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struct nlmsghdr *nlh,
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struct netlink_skb_parms *req);
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extern void fib6_run_gc(unsigned long dummy);
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extern void fib6_gc_cleanup(void);
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extern void fib6_init(void);
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#endif
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#endif
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