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net/ipv6/ip6_fib.c
35.6 KB
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/* |
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* Linux INET6 implementation |
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* Forwarding Information Database * * 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 * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ /* * Changes: * Yuji SEKIYA @USAGI: Support default route on router node; * remove ip6_null_entry from the top of * routing table. |
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* Ville Nuorvala: Fixed routing subtrees. |
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*/ |
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#include <linux/errno.h> #include <linux/types.h> #include <linux/net.h> #include <linux/route.h> #include <linux/netdevice.h> #include <linux/in6.h> #include <linux/init.h> |
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#include <linux/list.h> |
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#include <linux/slab.h> |
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#include <net/ipv6.h> #include <net/ndisc.h> #include <net/addrconf.h> #include <net/ip6_fib.h> #include <net/ip6_route.h> #define RT6_DEBUG 2 #if RT6_DEBUG >= 3 #define RT6_TRACE(x...) printk(KERN_DEBUG x) #else #define RT6_TRACE(x...) do { ; } while (0) #endif |
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static struct kmem_cache * fib6_node_kmem __read_mostly; |
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enum fib_walk_state_t { #ifdef CONFIG_IPV6_SUBTREES FWS_S, #endif FWS_L, FWS_R, FWS_C, FWS_U }; struct fib6_cleaner_t { struct fib6_walker_t w; |
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struct net *net; |
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int (*func)(struct rt6_info *, void *arg); void *arg; }; |
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static DEFINE_RWLOCK(fib6_walker_lock); |
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#ifdef CONFIG_IPV6_SUBTREES #define FWS_INIT FWS_S |
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#else #define FWS_INIT FWS_L |
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#endif |
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static void fib6_prune_clones(struct net *net, struct fib6_node *fn, struct rt6_info *rt); |
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static struct rt6_info *fib6_find_prefix(struct net *net, struct fib6_node *fn); static struct fib6_node *fib6_repair_tree(struct net *net, struct fib6_node *fn); |
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static int fib6_walk(struct fib6_walker_t *w); static int fib6_walk_continue(struct fib6_walker_t *w); |
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/* * A routing update causes an increase of the serial number on the * affected subtree. This allows for cached routes to be asynchronously * tested when modifications are made to the destination cache as a * result of redirects, path MTU changes, etc. */ static __u32 rt_sernum; |
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static void fib6_gc_timer_cb(unsigned long arg); |
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static LIST_HEAD(fib6_walkers); #define FOR_WALKERS(w) list_for_each_entry(w, &fib6_walkers, lh) |
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static inline void fib6_walker_link(struct fib6_walker_t *w) { write_lock_bh(&fib6_walker_lock); |
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list_add(&w->lh, &fib6_walkers); |
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write_unlock_bh(&fib6_walker_lock); } static inline void fib6_walker_unlink(struct fib6_walker_t *w) { write_lock_bh(&fib6_walker_lock); |
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list_del(&w->lh); |
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write_unlock_bh(&fib6_walker_lock); } |
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static __inline__ u32 fib6_new_sernum(void) { u32 n = ++rt_sernum; if ((__s32)n <= 0) rt_sernum = n = 1; return n; } /* * Auxiliary address test functions for the radix tree. * |
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* These assume a 32bit processor (although it will work on |
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* 64bit processors) */ /* * test bit */ |
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#if defined(__LITTLE_ENDIAN) # define BITOP_BE32_SWIZZLE (0x1F & ~7) #else # define BITOP_BE32_SWIZZLE 0 #endif |
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|
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static __inline__ __be32 addr_bit_set(const void *token, int fn_bit) |
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{ |
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const __be32 *addr = token; |
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/* * Here, * 1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f) * is optimized version of * htonl(1 << ((~fn_bit)&0x1F)) * See include/asm-generic/bitops/le.h. */ |
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return (__force __be32)(1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) & addr[fn_bit >> 5]; |
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} |
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static __inline__ struct fib6_node * node_alloc(void) { struct fib6_node *fn; |
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fn = kmem_cache_zalloc(fib6_node_kmem, GFP_ATOMIC); |
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return fn; } static __inline__ void node_free(struct fib6_node * fn) { kmem_cache_free(fib6_node_kmem, fn); } static __inline__ void rt6_release(struct rt6_info *rt) { if (atomic_dec_and_test(&rt->rt6i_ref)) |
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dst_free(&rt->dst); |
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} |
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static void fib6_link_table(struct net *net, struct fib6_table *tb) |
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{ unsigned int h; |
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/* * Initialize table lock at a single place to give lockdep a key, * tables aren't visible prior to being linked to the list. */ rwlock_init(&tb->tb6_lock); |
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h = tb->tb6_id & (FIB6_TABLE_HASHSZ - 1); |
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/* * No protection necessary, this is the only list mutatation * operation, tables never disappear once they exist. */ |
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hlist_add_head_rcu(&tb->tb6_hlist, &net->ipv6.fib_table_hash[h]); |
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} |
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|
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#ifdef CONFIG_IPV6_MULTIPLE_TABLES |
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|
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static struct fib6_table *fib6_alloc_table(struct net *net, u32 id) |
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{ struct fib6_table *table; table = kzalloc(sizeof(*table), GFP_ATOMIC); |
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if (table) { |
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table->tb6_id = id; |
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table->tb6_root.leaf = net->ipv6.ip6_null_entry; |
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table->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; } return table; } |
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struct fib6_table *fib6_new_table(struct net *net, u32 id) |
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{ struct fib6_table *tb; if (id == 0) id = RT6_TABLE_MAIN; |
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tb = fib6_get_table(net, id); |
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if (tb) return tb; |
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tb = fib6_alloc_table(net, id); |
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if (tb) |
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fib6_link_table(net, tb); |
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return tb; } |
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struct fib6_table *fib6_get_table(struct net *net, u32 id) |
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{ struct fib6_table *tb; |
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struct hlist_head *head; |
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struct hlist_node *node; unsigned int h; if (id == 0) id = RT6_TABLE_MAIN; |
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h = id & (FIB6_TABLE_HASHSZ - 1); |
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rcu_read_lock(); |
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head = &net->ipv6.fib_table_hash[h]; hlist_for_each_entry_rcu(tb, node, head, tb6_hlist) { |
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if (tb->tb6_id == id) { rcu_read_unlock(); return tb; } } rcu_read_unlock(); return NULL; } |
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static void __net_init fib6_tables_init(struct net *net) |
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{ |
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fib6_link_table(net, net->ipv6.fib6_main_tbl); fib6_link_table(net, net->ipv6.fib6_local_tbl); |
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} |
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#else |
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struct fib6_table *fib6_new_table(struct net *net, u32 id) |
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{ |
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return fib6_get_table(net, id); |
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} |
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struct fib6_table *fib6_get_table(struct net *net, u32 id) |
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{ |
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return net->ipv6.fib6_main_tbl; |
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} |
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struct dst_entry *fib6_rule_lookup(struct net *net, struct flowi6 *fl6, |
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int flags, pol_lookup_t lookup) |
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{ |
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return (struct dst_entry *) lookup(net, net->ipv6.fib6_main_tbl, fl6, flags); |
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} |
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static void __net_init fib6_tables_init(struct net *net) |
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{ |
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fib6_link_table(net, net->ipv6.fib6_main_tbl); |
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} #endif |
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static int fib6_dump_node(struct fib6_walker_t *w) { int res; struct rt6_info *rt; |
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for (rt = w->leaf; rt; rt = rt->dst.rt6_next) { |
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res = rt6_dump_route(rt, w->args); if (res < 0) { /* Frame is full, suspend walking */ w->leaf = rt; return 1; } |
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WARN_ON(res == 0); |
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} w->leaf = NULL; return 0; } static void fib6_dump_end(struct netlink_callback *cb) { struct fib6_walker_t *w = (void*)cb->args[2]; if (w) { |
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if (cb->args[4]) { cb->args[4] = 0; fib6_walker_unlink(w); } |
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cb->args[2] = 0; kfree(w); } cb->done = (void*)cb->args[3]; cb->args[1] = 3; } static int fib6_dump_done(struct netlink_callback *cb) { fib6_dump_end(cb); return cb->done ? cb->done(cb) : 0; } static int fib6_dump_table(struct fib6_table *table, struct sk_buff *skb, struct netlink_callback *cb) { struct fib6_walker_t *w; int res; w = (void *)cb->args[2]; w->root = &table->tb6_root; if (cb->args[4] == 0) { |
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w->count = 0; w->skip = 0; |
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read_lock_bh(&table->tb6_lock); res = fib6_walk(w); read_unlock_bh(&table->tb6_lock); |
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if (res > 0) { |
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cb->args[4] = 1; |
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cb->args[5] = w->root->fn_sernum; } |
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} else { |
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if (cb->args[5] != w->root->fn_sernum) { /* Begin at the root if the tree changed */ cb->args[5] = w->root->fn_sernum; w->state = FWS_INIT; w->node = w->root; w->skip = w->count; } else w->skip = 0; |
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read_lock_bh(&table->tb6_lock); res = fib6_walk_continue(w); read_unlock_bh(&table->tb6_lock); |
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if (res <= 0) { fib6_walker_unlink(w); cb->args[4] = 0; |
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} |
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} |
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|
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return res; } |
c127ea2c4 [IPv6]: Use rtnl ... |
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static int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
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{ |
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struct net *net = sock_net(skb->sk); |
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unsigned int h, s_h; unsigned int e = 0, s_e; struct rt6_rtnl_dump_arg arg; struct fib6_walker_t *w; struct fib6_table *tb; struct hlist_node *node; |
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struct hlist_head *head; |
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int res = 0; s_h = cb->args[0]; s_e = cb->args[1]; w = (void *)cb->args[2]; |
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if (!w) { |
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/* New dump: * * 1. hook callback destructor. */ cb->args[3] = (long)cb->done; cb->done = fib6_dump_done; /* * 2. allocate and initialize walker. */ w = kzalloc(sizeof(*w), GFP_ATOMIC); |
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if (!w) |
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return -ENOMEM; w->func = fib6_dump_node; cb->args[2] = (long)w; } arg.skb = skb; arg.cb = cb; |
191cd5825 netns: Add networ... |
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arg.net = net; |
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w->args = &arg; |
e67f88dd1 net: dont hold rt... |
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rcu_read_lock(); |
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for (h = s_h; h < FIB6_TABLE_HASHSZ; h++, s_e = 0) { |
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e = 0; |
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head = &net->ipv6.fib_table_hash[h]; |
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hlist_for_each_entry_rcu(tb, node, head, tb6_hlist) { |
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if (e < s_e) goto next; res = fib6_dump_table(tb, skb, cb); if (res != 0) goto out; next: e++; } } out: |
e67f88dd1 net: dont hold rt... |
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rcu_read_unlock(); |
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cb->args[1] = e; cb->args[0] = h; res = res < 0 ? res : skb->len; if (res <= 0) fib6_dump_end(cb); return res; } |
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/* * Routing Table * * return the appropriate node for a routing tree "add" operation * by either creating and inserting or by returning an existing * node. */ static struct fib6_node * fib6_add_1(struct fib6_node *root, void *addr, int addrlen, int plen, |
4a287eba2 IPv6 routing, NLM... |
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int offset, int allow_create, int replace_required) |
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{ struct fib6_node *fn, *in, *ln; struct fib6_node *pn = NULL; struct rt6key *key; int bit; |
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__be32 dir = 0; |
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__u32 sernum = fib6_new_sernum(); RT6_TRACE("fib6_add_1 "); /* insert node in tree */ fn = root; do { key = (struct rt6key *)((u8 *)fn->leaf + offset); /* * Prefix match */ if (plen < fn->fn_bit || |
4a287eba2 IPv6 routing, NLM... |
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!ipv6_prefix_equal(&key->addr, addr, fn->fn_bit)) { |
14df015bb IPV6 Fix a crash ... |
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if (!allow_create) { if (replace_required) { |
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pr_warn("IPv6: Can't replace route, " "no match found "); |
14df015bb IPV6 Fix a crash ... |
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return ERR_PTR(-ENOENT); } |
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pr_warn("IPv6: NLM_F_CREATE should be set " "when creating new route "); |
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} |
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goto insert_above; |
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} |
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|
1da177e4c Linux-2.6.12-rc2 |
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/* * Exact match ? */ |
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|
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if (plen == fn->fn_bit) { /* clean up an intermediate node */ |
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if (!(fn->fn_flags & RTN_RTINFO)) { |
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rt6_release(fn->leaf); fn->leaf = NULL; } |
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|
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fn->fn_sernum = sernum; |
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|
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return fn; } /* * We have more bits to go */ |
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|
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/* Try to walk down on tree. */ fn->fn_sernum = sernum; dir = addr_bit_set(addr, fn->fn_bit); pn = fn; fn = dir ? fn->right: fn->left; } while (fn); |
14df015bb IPV6 Fix a crash ... |
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if (!allow_create) { |
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/* We should not create new node because * NLM_F_REPLACE was specified without NLM_F_CREATE * I assume it is safe to require NLM_F_CREATE when * REPLACE flag is used! Later we may want to remove the * check for replace_required, because according * to netlink specification, NLM_F_CREATE * MUST be specified if new route is created. * That would keep IPv6 consistent with IPv4 */ |
14df015bb IPV6 Fix a crash ... |
479 |
if (replace_required) { |
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pr_warn("IPv6: Can't replace route, no match found "); |
14df015bb IPV6 Fix a crash ... |
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return ERR_PTR(-ENOENT); } |
8d26784cf ipv6: Use pr_warn... |
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pr_warn("IPv6: NLM_F_CREATE should be set " "when creating new route "); |
4a287eba2 IPv6 routing, NLM... |
487 |
} |
1da177e4c Linux-2.6.12-rc2 |
488 489 490 491 492 493 |
/* * We walked to the bottom of tree. * Create new leaf node without children. */ ln = node_alloc(); |
507c9b1e0 ipv6: Various cle... |
494 |
if (!ln) |
1da177e4c Linux-2.6.12-rc2 |
495 496 |
return NULL; ln->fn_bit = plen; |
1ab1457c4 [NET] IPV6: Fix w... |
497 |
|
1da177e4c Linux-2.6.12-rc2 |
498 499 500 501 502 503 504 505 506 507 508 509 510 |
ln->parent = pn; ln->fn_sernum = sernum; if (dir) pn->right = ln; else pn->left = ln; return ln; insert_above: /* |
1ab1457c4 [NET] IPV6: Fix w... |
511 |
* split since we don't have a common prefix anymore or |
1da177e4c Linux-2.6.12-rc2 |
512 513 514 515 516 517 518 519 520 |
* we have a less significant route. * we've to insert an intermediate node on the list * this new node will point to the one we need to create * and the current */ pn = fn->parent; /* find 1st bit in difference between the 2 addrs. |
971f359dd [IPV6]: Put addr_... |
521 |
See comment in __ipv6_addr_diff: bit may be an invalid value, |
1da177e4c Linux-2.6.12-rc2 |
522 523 |
but if it is >= plen, the value is ignored in any case. */ |
1ab1457c4 [NET] IPV6: Fix w... |
524 |
|
971f359dd [IPV6]: Put addr_... |
525 |
bit = __ipv6_addr_diff(addr, &key->addr, addrlen); |
1da177e4c Linux-2.6.12-rc2 |
526 |
|
1ab1457c4 [NET] IPV6: Fix w... |
527 528 |
/* * (intermediate)[in] |
1da177e4c Linux-2.6.12-rc2 |
529 530 531 532 533 534 |
* / \ * (new leaf node)[ln] (old node)[fn] */ if (plen > bit) { in = node_alloc(); ln = node_alloc(); |
1ab1457c4 [NET] IPV6: Fix w... |
535 |
|
507c9b1e0 ipv6: Various cle... |
536 |
if (!in || !ln) { |
1da177e4c Linux-2.6.12-rc2 |
537 538 539 540 541 542 |
if (in) node_free(in); if (ln) node_free(ln); return NULL; } |
1ab1457c4 [NET] IPV6: Fix w... |
543 544 |
/* * new intermediate node. |
1da177e4c Linux-2.6.12-rc2 |
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 |
* RTN_RTINFO will * be off since that an address that chooses one of * the branches would not match less specific routes * in the other branch */ in->fn_bit = bit; in->parent = pn; in->leaf = fn->leaf; atomic_inc(&in->leaf->rt6i_ref); in->fn_sernum = sernum; /* update parent pointer */ if (dir) pn->right = in; else pn->left = in; ln->fn_bit = plen; ln->parent = in; fn->parent = in; ln->fn_sernum = sernum; if (addr_bit_set(addr, bit)) { in->right = ln; in->left = fn; } else { in->left = ln; in->right = fn; } } else { /* plen <= bit */ |
1ab1457c4 [NET] IPV6: Fix w... |
580 |
/* |
1da177e4c Linux-2.6.12-rc2 |
581 582 583 584 585 586 |
* (new leaf node)[ln] * / \ * (old node)[fn] NULL */ ln = node_alloc(); |
507c9b1e0 ipv6: Various cle... |
587 |
if (!ln) |
1da177e4c Linux-2.6.12-rc2 |
588 589 590 591 592 593 594 |
return NULL; ln->fn_bit = plen; ln->parent = pn; ln->fn_sernum = sernum; |
1ab1457c4 [NET] IPV6: Fix w... |
595 |
|
1da177e4c Linux-2.6.12-rc2 |
596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 |
if (dir) pn->right = ln; else pn->left = ln; if (addr_bit_set(&key->addr, plen)) ln->right = fn; else ln->left = fn; fn->parent = ln; } return ln; } /* * Insert routing information in a node. */ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt, |
86872cb57 [IPv6] route: FIB... |
616 |
struct nl_info *info) |
1da177e4c Linux-2.6.12-rc2 |
617 618 619 |
{ struct rt6_info *iter = NULL; struct rt6_info **ins; |
507c9b1e0 ipv6: Various cle... |
620 621 622 623 |
int replace = (info->nlh && (info->nlh->nlmsg_flags & NLM_F_REPLACE)); int add = (!info->nlh || (info->nlh->nlmsg_flags & NLM_F_CREATE)); |
4a287eba2 IPv6 routing, NLM... |
624 |
int found = 0; |
1da177e4c Linux-2.6.12-rc2 |
625 626 |
ins = &fn->leaf; |
507c9b1e0 ipv6: Various cle... |
627 |
for (iter = fn->leaf; iter; iter = iter->dst.rt6_next) { |
1da177e4c Linux-2.6.12-rc2 |
628 629 630 631 632 633 634 635 |
/* * Search for duplicates */ if (iter->rt6i_metric == rt->rt6i_metric) { /* * Same priority level */ |
507c9b1e0 ipv6: Various cle... |
636 637 |
if (info->nlh && (info->nlh->nlmsg_flags & NLM_F_EXCL)) |
4a287eba2 IPv6 routing, NLM... |
638 639 640 641 642 |
return -EEXIST; if (replace) { found++; break; } |
1da177e4c Linux-2.6.12-rc2 |
643 |
|
d19185428 ipv6: Kill rt6i_d... |
644 |
if (iter->dst.dev == rt->dst.dev && |
1da177e4c Linux-2.6.12-rc2 |
645 646 647 |
iter->rt6i_idev == rt->rt6i_idev && ipv6_addr_equal(&iter->rt6i_gateway, &rt->rt6i_gateway)) { |
507c9b1e0 ipv6: Various cle... |
648 |
if (!(iter->rt6i_flags & RTF_EXPIRES)) |
1da177e4c Linux-2.6.12-rc2 |
649 |
return -EEXIST; |
d19185428 ipv6: Kill rt6i_d... |
650 |
iter->dst.expires = rt->dst.expires; |
507c9b1e0 ipv6: Various cle... |
651 |
if (!(rt->rt6i_flags & RTF_EXPIRES)) { |
1da177e4c Linux-2.6.12-rc2 |
652 |
iter->rt6i_flags &= ~RTF_EXPIRES; |
d19185428 ipv6: Kill rt6i_d... |
653 |
iter->dst.expires = 0; |
1da177e4c Linux-2.6.12-rc2 |
654 655 656 657 658 659 660 |
} return -EEXIST; } } if (iter->rt6i_metric > rt->rt6i_metric) break; |
d8d1f30b9 net-next: remove ... |
661 |
ins = &iter->dst.rt6_next; |
1da177e4c Linux-2.6.12-rc2 |
662 |
} |
f11e6659c [IPV6]: Fix routi... |
663 664 665 |
/* Reset round-robin state, if necessary */ if (ins == &fn->leaf) fn->rr_ptr = NULL; |
1da177e4c Linux-2.6.12-rc2 |
666 667 668 |
/* * insert node */ |
4a287eba2 IPv6 routing, NLM... |
669 670 |
if (!replace) { if (!add) |
8d26784cf ipv6: Use pr_warn... |
671 672 |
pr_warn("IPv6: NLM_F_CREATE should be set when creating new route "); |
4a287eba2 IPv6 routing, NLM... |
673 674 675 676 677 678 679 680 |
add: rt->dst.rt6_next = iter; *ins = rt; rt->rt6i_node = fn; atomic_inc(&rt->rt6i_ref); inet6_rt_notify(RTM_NEWROUTE, rt, info); info->nl_net->ipv6.rt6_stats->fib_rt_entries++; |
507c9b1e0 ipv6: Various cle... |
681 |
if (!(fn->fn_flags & RTN_RTINFO)) { |
4a287eba2 IPv6 routing, NLM... |
682 683 684 |
info->nl_net->ipv6.rt6_stats->fib_route_nodes++; fn->fn_flags |= RTN_RTINFO; } |
1da177e4c Linux-2.6.12-rc2 |
685 |
|
4a287eba2 IPv6 routing, NLM... |
686 687 688 689 |
} else { if (!found) { if (add) goto add; |
8d26784cf ipv6: Use pr_warn... |
690 691 |
pr_warn("IPv6: NLM_F_REPLACE set, but no existing node found! "); |
4a287eba2 IPv6 routing, NLM... |
692 693 694 695 696 697 698 699 |
return -ENOENT; } *ins = rt; rt->rt6i_node = fn; rt->dst.rt6_next = iter->dst.rt6_next; atomic_inc(&rt->rt6i_ref); inet6_rt_notify(RTM_NEWROUTE, rt, info); rt6_release(iter); |
507c9b1e0 ipv6: Various cle... |
700 |
if (!(fn->fn_flags & RTN_RTINFO)) { |
4a287eba2 IPv6 routing, NLM... |
701 702 703 |
info->nl_net->ipv6.rt6_stats->fib_route_nodes++; fn->fn_flags |= RTN_RTINFO; } |
1da177e4c Linux-2.6.12-rc2 |
704 705 706 707 |
} return 0; } |
63152fc0d [NETNS][IPV6] ip6... |
708 |
static __inline__ void fib6_start_gc(struct net *net, struct rt6_info *rt) |
1da177e4c Linux-2.6.12-rc2 |
709 |
{ |
417f28bb3 netns: dont alloc... |
710 |
if (!timer_pending(&net->ipv6.ip6_fib_timer) && |
507c9b1e0 ipv6: Various cle... |
711 |
(rt->rt6i_flags & (RTF_EXPIRES | RTF_CACHE))) |
417f28bb3 netns: dont alloc... |
712 |
mod_timer(&net->ipv6.ip6_fib_timer, |
847499ce7 ipv6: use timer p... |
713 |
jiffies + net->ipv6.sysctl.ip6_rt_gc_interval); |
1da177e4c Linux-2.6.12-rc2 |
714 |
} |
63152fc0d [NETNS][IPV6] ip6... |
715 |
void fib6_force_start_gc(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
716 |
{ |
417f28bb3 netns: dont alloc... |
717 718 |
if (!timer_pending(&net->ipv6.ip6_fib_timer)) mod_timer(&net->ipv6.ip6_fib_timer, |
847499ce7 ipv6: use timer p... |
719 |
jiffies + net->ipv6.sysctl.ip6_rt_gc_interval); |
1da177e4c Linux-2.6.12-rc2 |
720 721 722 723 724 725 726 |
} /* * Add routing information to the routing tree. * <destination addr>/<source addr> * with source addr info in sub-trees */ |
86872cb57 [IPv6] route: FIB... |
727 |
int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) |
1da177e4c Linux-2.6.12-rc2 |
728 |
{ |
66729e18d [IPV6] ROUTE: Mak... |
729 |
struct fib6_node *fn, *pn = NULL; |
1da177e4c Linux-2.6.12-rc2 |
730 |
int err = -ENOMEM; |
4a287eba2 IPv6 routing, NLM... |
731 732 |
int allow_create = 1; int replace_required = 0; |
507c9b1e0 ipv6: Various cle... |
733 734 735 |
if (info->nlh) { if (!(info->nlh->nlmsg_flags & NLM_F_CREATE)) |
4a287eba2 IPv6 routing, NLM... |
736 |
allow_create = 0; |
507c9b1e0 ipv6: Various cle... |
737 |
if (info->nlh->nlmsg_flags & NLM_F_REPLACE) |
4a287eba2 IPv6 routing, NLM... |
738 739 740 |
replace_required = 1; } if (!allow_create && !replace_required) |
8d26784cf ipv6: Use pr_warn... |
741 742 |
pr_warn("IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE "); |
1da177e4c Linux-2.6.12-rc2 |
743 744 |
fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr), |
507c9b1e0 ipv6: Various cle... |
745 746 |
rt->rt6i_dst.plen, offsetof(struct rt6_info, rt6i_dst), allow_create, replace_required); |
4a287eba2 IPv6 routing, NLM... |
747 748 749 750 751 |
if (IS_ERR(fn)) { err = PTR_ERR(fn); fn = NULL; } |
1da177e4c Linux-2.6.12-rc2 |
752 |
|
507c9b1e0 ipv6: Various cle... |
753 |
if (!fn) |
1da177e4c Linux-2.6.12-rc2 |
754 |
goto out; |
66729e18d [IPV6] ROUTE: Mak... |
755 |
pn = fn; |
1da177e4c Linux-2.6.12-rc2 |
756 757 758 |
#ifdef CONFIG_IPV6_SUBTREES if (rt->rt6i_src.plen) { struct fib6_node *sn; |
507c9b1e0 ipv6: Various cle... |
759 |
if (!fn->subtree) { |
1da177e4c Linux-2.6.12-rc2 |
760 761 762 763 764 765 766 767 768 769 770 771 772 773 |
struct fib6_node *sfn; /* * Create subtree. * * fn[main tree] * | * sfn[subtree root] * \ * sn[new leaf node] */ /* Create subtree root node */ sfn = node_alloc(); |
507c9b1e0 ipv6: Various cle... |
774 |
if (!sfn) |
1da177e4c Linux-2.6.12-rc2 |
775 |
goto st_failure; |
8ed677896 [NETNS][IPV6] rt6... |
776 777 |
sfn->leaf = info->nl_net->ipv6.ip6_null_entry; atomic_inc(&info->nl_net->ipv6.ip6_null_entry->rt6i_ref); |
1da177e4c Linux-2.6.12-rc2 |
778 779 780 781 782 783 784 |
sfn->fn_flags = RTN_ROOT; sfn->fn_sernum = fib6_new_sernum(); /* Now add the first leaf node to new subtree */ sn = fib6_add_1(sfn, &rt->rt6i_src.addr, sizeof(struct in6_addr), rt->rt6i_src.plen, |
4a287eba2 IPv6 routing, NLM... |
785 786 |
offsetof(struct rt6_info, rt6i_src), allow_create, replace_required); |
1da177e4c Linux-2.6.12-rc2 |
787 |
|
507c9b1e0 ipv6: Various cle... |
788 |
if (!sn) { |
1da177e4c Linux-2.6.12-rc2 |
789 790 791 792 793 794 795 796 797 798 799 |
/* If it is failed, discard just allocated root, and then (in st_failure) stale node in main tree. */ node_free(sfn); goto st_failure; } /* Now link new subtree to main tree */ sfn->parent = fn; fn->subtree = sfn; |
1da177e4c Linux-2.6.12-rc2 |
800 801 802 |
} else { sn = fib6_add_1(fn->subtree, &rt->rt6i_src.addr, sizeof(struct in6_addr), rt->rt6i_src.plen, |
4a287eba2 IPv6 routing, NLM... |
803 804 |
offsetof(struct rt6_info, rt6i_src), allow_create, replace_required); |
1da177e4c Linux-2.6.12-rc2 |
805 |
|
4a287eba2 IPv6 routing, NLM... |
806 807 808 809 |
if (IS_ERR(sn)) { err = PTR_ERR(sn); sn = NULL; } |
507c9b1e0 ipv6: Various cle... |
810 |
if (!sn) |
1da177e4c Linux-2.6.12-rc2 |
811 812 |
goto st_failure; } |
507c9b1e0 ipv6: Various cle... |
813 |
if (!fn->leaf) { |
66729e18d [IPV6] ROUTE: Mak... |
814 815 816 |
fn->leaf = rt; atomic_inc(&rt->rt6i_ref); } |
1da177e4c Linux-2.6.12-rc2 |
817 818 819 |
fn = sn; } #endif |
86872cb57 [IPv6] route: FIB... |
820 |
err = fib6_add_rt2node(fn, rt, info); |
507c9b1e0 ipv6: Various cle... |
821 |
if (!err) { |
63152fc0d [NETNS][IPV6] ip6... |
822 |
fib6_start_gc(info->nl_net, rt); |
507c9b1e0 ipv6: Various cle... |
823 |
if (!(rt->rt6i_flags & RTF_CACHE)) |
ec7d43c29 [NETNS][IPV6] ip6... |
824 |
fib6_prune_clones(info->nl_net, pn, rt); |
1da177e4c Linux-2.6.12-rc2 |
825 826 827 |
} out: |
66729e18d [IPV6] ROUTE: Mak... |
828 829 830 831 832 833 |
if (err) { #ifdef CONFIG_IPV6_SUBTREES /* * If fib6_add_1 has cleared the old leaf pointer in the * super-tree leaf node we have to find a new one for it. */ |
3c051235a [IPV6]: Fix dangl... |
834 835 836 837 |
if (pn != fn && pn->leaf == rt) { pn->leaf = NULL; atomic_dec(&rt->rt6i_ref); } |
66729e18d [IPV6] ROUTE: Mak... |
838 |
if (pn != fn && !pn->leaf && !(pn->fn_flags & RTN_RTINFO)) { |
8ed677896 [NETNS][IPV6] rt6... |
839 |
pn->leaf = fib6_find_prefix(info->nl_net, pn); |
66729e18d [IPV6] ROUTE: Mak... |
840 841 |
#if RT6_DEBUG >= 2 if (!pn->leaf) { |
547b792ca net: convert BUG_... |
842 |
WARN_ON(pn->leaf == NULL); |
8ed677896 [NETNS][IPV6] rt6... |
843 |
pn->leaf = info->nl_net->ipv6.ip6_null_entry; |
66729e18d [IPV6] ROUTE: Mak... |
844 845 846 847 848 |
} #endif atomic_inc(&pn->leaf->rt6i_ref); } #endif |
d8d1f30b9 net-next: remove ... |
849 |
dst_free(&rt->dst); |
66729e18d [IPV6] ROUTE: Mak... |
850 |
} |
1da177e4c Linux-2.6.12-rc2 |
851 852 853 854 855 856 857 858 |
return err; #ifdef CONFIG_IPV6_SUBTREES /* Subtree creation failed, probably main tree node is orphan. If it is, shoot it. */ st_failure: if (fn && !(fn->fn_flags & (RTN_RTINFO|RTN_ROOT))) |
8ed677896 [NETNS][IPV6] rt6... |
859 |
fib6_repair_tree(info->nl_net, fn); |
d8d1f30b9 net-next: remove ... |
860 |
dst_free(&rt->dst); |
1da177e4c Linux-2.6.12-rc2 |
861 862 863 864 865 866 867 868 869 870 |
return err; #endif } /* * Routing tree lookup * */ struct lookup_args { |
507c9b1e0 ipv6: Various cle... |
871 |
int offset; /* key offset on rt6_info */ |
b71d1d426 inet: constify ip... |
872 |
const struct in6_addr *addr; /* search key */ |
1da177e4c Linux-2.6.12-rc2 |
873 874 875 876 877 878 |
}; static struct fib6_node * fib6_lookup_1(struct fib6_node *root, struct lookup_args *args) { struct fib6_node *fn; |
e69a4adc6 [IPV6]: Misc endi... |
879 |
__be32 dir; |
1da177e4c Linux-2.6.12-rc2 |
880 |
|
825e288ef [IPV6] ROUTE: Mak... |
881 882 |
if (unlikely(args->offset == 0)) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 |
/* * Descend on a tree */ fn = root; for (;;) { struct fib6_node *next; dir = addr_bit_set(args->addr, fn->fn_bit); next = dir ? fn->right : fn->left; if (next) { fn = next; continue; } |
1da177e4c Linux-2.6.12-rc2 |
900 901 |
break; } |
507c9b1e0 ipv6: Various cle... |
902 |
while (fn) { |
7fc33165a [IPV6] ROUTE: Put... |
903 |
if (FIB6_SUBTREE(fn) || fn->fn_flags & RTN_RTINFO) { |
1da177e4c Linux-2.6.12-rc2 |
904 905 906 907 |
struct rt6key *key; key = (struct rt6key *) ((u8 *) fn->leaf + args->offset); |
3fc5e0440 [IPV6] ROUTE: Fix... |
908 909 910 911 912 913 914 915 |
if (ipv6_prefix_equal(&key->addr, args->addr, key->plen)) { #ifdef CONFIG_IPV6_SUBTREES if (fn->subtree) fn = fib6_lookup_1(fn->subtree, args + 1); #endif if (!fn || fn->fn_flags & RTN_RTINFO) return fn; } |
1da177e4c Linux-2.6.12-rc2 |
916 |
} |
3fc5e0440 [IPV6] ROUTE: Fix... |
917 918 |
if (fn->fn_flags & RTN_ROOT) break; |
1da177e4c Linux-2.6.12-rc2 |
919 920 921 922 923 |
fn = fn->parent; } return NULL; } |
b71d1d426 inet: constify ip... |
924 925 |
struct fib6_node * fib6_lookup(struct fib6_node *root, const struct in6_addr *daddr, const struct in6_addr *saddr) |
1da177e4c Linux-2.6.12-rc2 |
926 |
{ |
1da177e4c Linux-2.6.12-rc2 |
927 |
struct fib6_node *fn; |
825e288ef [IPV6] ROUTE: Mak... |
928 929 930 931 932 |
struct lookup_args args[] = { { .offset = offsetof(struct rt6_info, rt6i_dst), .addr = daddr, }, |
1da177e4c Linux-2.6.12-rc2 |
933 |
#ifdef CONFIG_IPV6_SUBTREES |
825e288ef [IPV6] ROUTE: Mak... |
934 935 936 937 |
{ .offset = offsetof(struct rt6_info, rt6i_src), .addr = saddr, }, |
1da177e4c Linux-2.6.12-rc2 |
938 |
#endif |
825e288ef [IPV6] ROUTE: Mak... |
939 940 941 942 |
{ .offset = 0, /* sentinel */ } }; |
1da177e4c Linux-2.6.12-rc2 |
943 |
|
fefc2a6c2 [IPV6] ROUTE: All... |
944 |
fn = fib6_lookup_1(root, daddr ? args : args + 1); |
507c9b1e0 ipv6: Various cle... |
945 |
if (!fn || fn->fn_flags & RTN_TL_ROOT) |
1da177e4c Linux-2.6.12-rc2 |
946 947 948 949 950 951 952 953 954 955 956 957 |
fn = root; return fn; } /* * Get node with specified destination prefix (and source prefix, * if subtrees are used) */ static struct fib6_node * fib6_locate_1(struct fib6_node *root, |
b71d1d426 inet: constify ip... |
958 |
const struct in6_addr *addr, |
1da177e4c Linux-2.6.12-rc2 |
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 |
int plen, int offset) { struct fib6_node *fn; for (fn = root; fn ; ) { struct rt6key *key = (struct rt6key *)((u8 *)fn->leaf + offset); /* * Prefix match */ if (plen < fn->fn_bit || !ipv6_prefix_equal(&key->addr, addr, fn->fn_bit)) return NULL; if (plen == fn->fn_bit) return fn; /* * We have more bits to go */ if (addr_bit_set(addr, fn->fn_bit)) fn = fn->right; else fn = fn->left; } return NULL; } struct fib6_node * fib6_locate(struct fib6_node *root, |
b71d1d426 inet: constify ip... |
988 989 |
const struct in6_addr *daddr, int dst_len, const struct in6_addr *saddr, int src_len) |
1da177e4c Linux-2.6.12-rc2 |
990 991 992 993 994 995 996 997 |
{ struct fib6_node *fn; fn = fib6_locate_1(root, daddr, dst_len, offsetof(struct rt6_info, rt6i_dst)); #ifdef CONFIG_IPV6_SUBTREES if (src_len) { |
547b792ca net: convert BUG_... |
998 |
WARN_ON(saddr == NULL); |
3fc5e0440 [IPV6] ROUTE: Fix... |
999 1000 |
if (fn && fn->subtree) fn = fib6_locate_1(fn->subtree, saddr, src_len, |
1da177e4c Linux-2.6.12-rc2 |
1001 1002 1003 |
offsetof(struct rt6_info, rt6i_src)); } #endif |
507c9b1e0 ipv6: Various cle... |
1004 |
if (fn && fn->fn_flags & RTN_RTINFO) |
1da177e4c Linux-2.6.12-rc2 |
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 |
return fn; return NULL; } /* * Deletion * */ |
8ed677896 [NETNS][IPV6] rt6... |
1015 |
static struct rt6_info *fib6_find_prefix(struct net *net, struct fib6_node *fn) |
1da177e4c Linux-2.6.12-rc2 |
1016 |
{ |
507c9b1e0 ipv6: Various cle... |
1017 |
if (fn->fn_flags & RTN_ROOT) |
8ed677896 [NETNS][IPV6] rt6... |
1018 |
return net->ipv6.ip6_null_entry; |
1da177e4c Linux-2.6.12-rc2 |
1019 |
|
507c9b1e0 ipv6: Various cle... |
1020 1021 |
while (fn) { if (fn->left) |
1da177e4c Linux-2.6.12-rc2 |
1022 |
return fn->left->leaf; |
507c9b1e0 ipv6: Various cle... |
1023 |
if (fn->right) |
1da177e4c Linux-2.6.12-rc2 |
1024 |
return fn->right->leaf; |
7fc33165a [IPV6] ROUTE: Put... |
1025 |
fn = FIB6_SUBTREE(fn); |
1da177e4c Linux-2.6.12-rc2 |
1026 1027 1028 1029 1030 1031 1032 1033 |
} return NULL; } /* * Called to trim the tree of intermediate nodes when possible. "fn" * is the node we want to try and remove. */ |
8ed677896 [NETNS][IPV6] rt6... |
1034 1035 |
static struct fib6_node *fib6_repair_tree(struct net *net, struct fib6_node *fn) |
1da177e4c Linux-2.6.12-rc2 |
1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 |
{ int children; int nstate; struct fib6_node *child, *pn; struct fib6_walker_t *w; int iter = 0; for (;;) { RT6_TRACE("fixing tree: plen=%d iter=%d ", fn->fn_bit, iter); iter++; |
547b792ca net: convert BUG_... |
1047 1048 1049 |
WARN_ON(fn->fn_flags & RTN_RTINFO); WARN_ON(fn->fn_flags & RTN_TL_ROOT); WARN_ON(fn->leaf != NULL); |
1da177e4c Linux-2.6.12-rc2 |
1050 1051 1052 1053 1054 |
children = 0; child = NULL; if (fn->right) child = fn->right, children |= 1; if (fn->left) child = fn->left, children |= 2; |
7fc33165a [IPV6] ROUTE: Put... |
1055 |
if (children == 3 || FIB6_SUBTREE(fn) |
1da177e4c Linux-2.6.12-rc2 |
1056 1057 |
#ifdef CONFIG_IPV6_SUBTREES /* Subtree root (i.e. fn) may have one child */ |
507c9b1e0 ipv6: Various cle... |
1058 |
|| (children && fn->fn_flags & RTN_ROOT) |
1da177e4c Linux-2.6.12-rc2 |
1059 1060 |
#endif ) { |
8ed677896 [NETNS][IPV6] rt6... |
1061 |
fn->leaf = fib6_find_prefix(net, fn); |
1da177e4c Linux-2.6.12-rc2 |
1062 |
#if RT6_DEBUG >= 2 |
507c9b1e0 ipv6: Various cle... |
1063 |
if (!fn->leaf) { |
547b792ca net: convert BUG_... |
1064 |
WARN_ON(!fn->leaf); |
8ed677896 [NETNS][IPV6] rt6... |
1065 |
fn->leaf = net->ipv6.ip6_null_entry; |
1da177e4c Linux-2.6.12-rc2 |
1066 1067 1068 1069 1070 1071 1072 1073 |
} #endif atomic_inc(&fn->leaf->rt6i_ref); return fn->parent; } pn = fn->parent; #ifdef CONFIG_IPV6_SUBTREES |
7fc33165a [IPV6] ROUTE: Put... |
1074 |
if (FIB6_SUBTREE(pn) == fn) { |
547b792ca net: convert BUG_... |
1075 |
WARN_ON(!(fn->fn_flags & RTN_ROOT)); |
7fc33165a [IPV6] ROUTE: Put... |
1076 |
FIB6_SUBTREE(pn) = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1077 1078 |
nstate = FWS_L; } else { |
547b792ca net: convert BUG_... |
1079 |
WARN_ON(fn->fn_flags & RTN_ROOT); |
1da177e4c Linux-2.6.12-rc2 |
1080 1081 1082 1083 |
#endif if (pn->right == fn) pn->right = child; else if (pn->left == fn) pn->left = child; #if RT6_DEBUG >= 2 |
547b792ca net: convert BUG_... |
1084 1085 |
else WARN_ON(1); |
1da177e4c Linux-2.6.12-rc2 |
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 |
#endif if (child) child->parent = pn; nstate = FWS_R; #ifdef CONFIG_IPV6_SUBTREES } #endif read_lock(&fib6_walker_lock); FOR_WALKERS(w) { |
507c9b1e0 ipv6: Various cle... |
1096 |
if (!child) { |
1da177e4c Linux-2.6.12-rc2 |
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 |
if (w->root == fn) { w->root = w->node = NULL; RT6_TRACE("W %p adjusted by delroot 1 ", w); } else if (w->node == fn) { RT6_TRACE("W %p adjusted by delnode 1, s=%d/%d ", w, w->state, nstate); w->node = pn; w->state = nstate; } } else { if (w->root == fn) { w->root = child; RT6_TRACE("W %p adjusted by delroot 2 ", w); } if (w->node == fn) { w->node = child; if (children&2) { RT6_TRACE("W %p adjusted by delnode 2, s=%d ", w, w->state); w->state = w->state>=FWS_R ? FWS_U : FWS_INIT; } else { RT6_TRACE("W %p adjusted by delnode 2, s=%d ", w, w->state); w->state = w->state>=FWS_C ? FWS_U : FWS_INIT; } } } } read_unlock(&fib6_walker_lock); node_free(fn); |
507c9b1e0 ipv6: Various cle... |
1130 |
if (pn->fn_flags & RTN_RTINFO || FIB6_SUBTREE(pn)) |
1da177e4c Linux-2.6.12-rc2 |
1131 1132 1133 1134 1135 1136 1137 1138 1139 |
return pn; rt6_release(pn->leaf); pn->leaf = NULL; fn = pn; } } static void fib6_del_route(struct fib6_node *fn, struct rt6_info **rtp, |
86872cb57 [IPv6] route: FIB... |
1140 |
struct nl_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1141 1142 1143 |
{ struct fib6_walker_t *w; struct rt6_info *rt = *rtp; |
c572872f8 [NETNS][IPV6] rt6... |
1144 |
struct net *net = info->nl_net; |
1da177e4c Linux-2.6.12-rc2 |
1145 1146 1147 1148 1149 |
RT6_TRACE("fib6_del_route "); /* Unlink it */ |
d8d1f30b9 net-next: remove ... |
1150 |
*rtp = rt->dst.rt6_next; |
1da177e4c Linux-2.6.12-rc2 |
1151 |
rt->rt6i_node = NULL; |
c572872f8 [NETNS][IPV6] rt6... |
1152 1153 |
net->ipv6.rt6_stats->fib_rt_entries--; net->ipv6.rt6_stats->fib_discarded_routes++; |
1da177e4c Linux-2.6.12-rc2 |
1154 |
|
f11e6659c [IPV6]: Fix routi... |
1155 1156 1157 |
/* Reset round-robin state, if necessary */ if (fn->rr_ptr == rt) fn->rr_ptr = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1158 1159 1160 1161 1162 1163 |
/* Adjust walkers */ read_lock(&fib6_walker_lock); FOR_WALKERS(w) { if (w->state == FWS_C && w->leaf == rt) { RT6_TRACE("walker %p adjusted by delroute ", w); |
d8d1f30b9 net-next: remove ... |
1164 |
w->leaf = rt->dst.rt6_next; |
507c9b1e0 ipv6: Various cle... |
1165 |
if (!w->leaf) |
1da177e4c Linux-2.6.12-rc2 |
1166 1167 1168 1169 |
w->state = FWS_U; } } read_unlock(&fib6_walker_lock); |
d8d1f30b9 net-next: remove ... |
1170 |
rt->dst.rt6_next = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1171 |
|
1da177e4c Linux-2.6.12-rc2 |
1172 |
/* If it was last route, expunge its radix tree node */ |
507c9b1e0 ipv6: Various cle... |
1173 |
if (!fn->leaf) { |
1da177e4c Linux-2.6.12-rc2 |
1174 |
fn->fn_flags &= ~RTN_RTINFO; |
c572872f8 [NETNS][IPV6] rt6... |
1175 |
net->ipv6.rt6_stats->fib_route_nodes--; |
8ed677896 [NETNS][IPV6] rt6... |
1176 |
fn = fib6_repair_tree(net, fn); |
1da177e4c Linux-2.6.12-rc2 |
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 |
} if (atomic_read(&rt->rt6i_ref) != 1) { /* This route is used as dummy address holder in some split * nodes. It is not leaked, but it still holds other resources, * which must be released in time. So, scan ascendant nodes * and replace dummy references to this route with references * to still alive ones. */ while (fn) { |
507c9b1e0 ipv6: Various cle... |
1187 |
if (!(fn->fn_flags & RTN_RTINFO) && fn->leaf == rt) { |
8ed677896 [NETNS][IPV6] rt6... |
1188 |
fn->leaf = fib6_find_prefix(net, fn); |
1da177e4c Linux-2.6.12-rc2 |
1189 1190 1191 1192 1193 1194 |
atomic_inc(&fn->leaf->rt6i_ref); rt6_release(rt); } fn = fn->parent; } /* No more references are possible at this point. */ |
2df96af03 [IPV6]: Use BUG_O... |
1195 |
BUG_ON(atomic_read(&rt->rt6i_ref) != 1); |
1da177e4c Linux-2.6.12-rc2 |
1196 |
} |
86872cb57 [IPv6] route: FIB... |
1197 |
inet6_rt_notify(RTM_DELROUTE, rt, info); |
1da177e4c Linux-2.6.12-rc2 |
1198 1199 |
rt6_release(rt); } |
86872cb57 [IPv6] route: FIB... |
1200 |
int fib6_del(struct rt6_info *rt, struct nl_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1201 |
{ |
8ed677896 [NETNS][IPV6] rt6... |
1202 |
struct net *net = info->nl_net; |
1da177e4c Linux-2.6.12-rc2 |
1203 1204 1205 1206 |
struct fib6_node *fn = rt->rt6i_node; struct rt6_info **rtp; #if RT6_DEBUG >= 2 |
d8d1f30b9 net-next: remove ... |
1207 |
if (rt->dst.obsolete>0) { |
547b792ca net: convert BUG_... |
1208 |
WARN_ON(fn != NULL); |
1da177e4c Linux-2.6.12-rc2 |
1209 1210 1211 |
return -ENOENT; } #endif |
507c9b1e0 ipv6: Various cle... |
1212 |
if (!fn || rt == net->ipv6.ip6_null_entry) |
1da177e4c Linux-2.6.12-rc2 |
1213 |
return -ENOENT; |
547b792ca net: convert BUG_... |
1214 |
WARN_ON(!(fn->fn_flags & RTN_RTINFO)); |
1da177e4c Linux-2.6.12-rc2 |
1215 |
|
507c9b1e0 ipv6: Various cle... |
1216 |
if (!(rt->rt6i_flags & RTF_CACHE)) { |
150730d5a [IPV6] ROUTE: Pur... |
1217 1218 1219 1220 |
struct fib6_node *pn = fn; #ifdef CONFIG_IPV6_SUBTREES /* clones of this route might be in another subtree */ if (rt->rt6i_src.plen) { |
507c9b1e0 ipv6: Various cle... |
1221 |
while (!(pn->fn_flags & RTN_ROOT)) |
150730d5a [IPV6] ROUTE: Pur... |
1222 1223 1224 1225 |
pn = pn->parent; pn = pn->parent; } #endif |
ec7d43c29 [NETNS][IPV6] ip6... |
1226 |
fib6_prune_clones(info->nl_net, pn, rt); |
150730d5a [IPV6] ROUTE: Pur... |
1227 |
} |
1da177e4c Linux-2.6.12-rc2 |
1228 1229 1230 1231 |
/* * Walk the leaf entries looking for ourself */ |
d8d1f30b9 net-next: remove ... |
1232 |
for (rtp = &fn->leaf; *rtp; rtp = &(*rtp)->dst.rt6_next) { |
1da177e4c Linux-2.6.12-rc2 |
1233 |
if (*rtp == rt) { |
86872cb57 [IPv6] route: FIB... |
1234 |
fib6_del_route(fn, rtp, info); |
1da177e4c Linux-2.6.12-rc2 |
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 |
return 0; } } return -ENOENT; } /* * Tree traversal function. * * Certainly, it is not interrupt safe. * However, it is internally reenterable wrt itself and fib6_add/fib6_del. * It means, that we can modify tree during walking * and use this function for garbage collection, clone pruning, |
1ab1457c4 [NET] IPV6: Fix w... |
1248 |
* cleaning tree when a device goes down etc. etc. |
1da177e4c Linux-2.6.12-rc2 |
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 |
* * It guarantees that every node will be traversed, * and that it will be traversed only once. * * Callback function w->func may return: * 0 -> continue walking. * positive value -> walking is suspended (used by tree dumps, * and probably by gc, if it will be split to several slices) * negative value -> terminate walking. * * The function itself returns: * 0 -> walk is complete. * >0 -> walk is incomplete (i.e. suspended) * <0 -> walk is terminated by an error. */ |
90d41122f [IPV6] ip6_fib.c:... |
1264 |
static int fib6_walk_continue(struct fib6_walker_t *w) |
1da177e4c Linux-2.6.12-rc2 |
1265 1266 1267 1268 1269 |
{ struct fib6_node *fn, *pn; for (;;) { fn = w->node; |
507c9b1e0 ipv6: Various cle... |
1270 |
if (!fn) |
1da177e4c Linux-2.6.12-rc2 |
1271 1272 1273 |
return 0; if (w->prune && fn != w->root && |
507c9b1e0 ipv6: Various cle... |
1274 |
fn->fn_flags & RTN_RTINFO && w->state < FWS_C) { |
1da177e4c Linux-2.6.12-rc2 |
1275 1276 1277 1278 1279 1280 |
w->state = FWS_C; w->leaf = fn->leaf; } switch (w->state) { #ifdef CONFIG_IPV6_SUBTREES case FWS_S: |
7fc33165a [IPV6] ROUTE: Put... |
1281 1282 |
if (FIB6_SUBTREE(fn)) { w->node = FIB6_SUBTREE(fn); |
1da177e4c Linux-2.6.12-rc2 |
1283 1284 1285 |
continue; } w->state = FWS_L; |
1ab1457c4 [NET] IPV6: Fix w... |
1286 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 |
case FWS_L: if (fn->left) { w->node = fn->left; w->state = FWS_INIT; continue; } w->state = FWS_R; case FWS_R: if (fn->right) { w->node = fn->right; w->state = FWS_INIT; continue; } w->state = FWS_C; w->leaf = fn->leaf; case FWS_C: |
507c9b1e0 ipv6: Various cle... |
1303 |
if (w->leaf && fn->fn_flags & RTN_RTINFO) { |
2bec5a369 ipv6: fib: fix cr... |
1304 1305 1306 1307 1308 1309 1310 1311 |
int err; if (w->count < w->skip) { w->count++; continue; } err = w->func(w); |
1da177e4c Linux-2.6.12-rc2 |
1312 1313 |
if (err) return err; |
2bec5a369 ipv6: fib: fix cr... |
1314 1315 |
w->count++; |
1da177e4c Linux-2.6.12-rc2 |
1316 1317 1318 1319 1320 1321 1322 1323 1324 |
continue; } w->state = FWS_U; case FWS_U: if (fn == w->root) return 0; pn = fn->parent; w->node = pn; #ifdef CONFIG_IPV6_SUBTREES |
7fc33165a [IPV6] ROUTE: Put... |
1325 |
if (FIB6_SUBTREE(pn) == fn) { |
547b792ca net: convert BUG_... |
1326 |
WARN_ON(!(fn->fn_flags & RTN_ROOT)); |
1da177e4c Linux-2.6.12-rc2 |
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 |
w->state = FWS_L; continue; } #endif if (pn->left == fn) { w->state = FWS_R; continue; } if (pn->right == fn) { w->state = FWS_C; w->leaf = w->node->leaf; continue; } #if RT6_DEBUG >= 2 |
547b792ca net: convert BUG_... |
1341 |
WARN_ON(1); |
1da177e4c Linux-2.6.12-rc2 |
1342 1343 1344 1345 |
#endif } } } |
90d41122f [IPV6] ip6_fib.c:... |
1346 |
static int fib6_walk(struct fib6_walker_t *w) |
1da177e4c Linux-2.6.12-rc2 |
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 |
{ int res; w->state = FWS_INIT; w->node = w->root; fib6_walker_link(w); res = fib6_walk_continue(w); if (res <= 0) fib6_walker_unlink(w); return res; } static int fib6_clean_node(struct fib6_walker_t *w) { int res; struct rt6_info *rt; |
0a8891a0a [IPv6]: use conta... |
1364 |
struct fib6_cleaner_t *c = container_of(w, struct fib6_cleaner_t, w); |
ec7d43c29 [NETNS][IPV6] ip6... |
1365 1366 1367 |
struct nl_info info = { .nl_net = c->net, }; |
1da177e4c Linux-2.6.12-rc2 |
1368 |
|
d8d1f30b9 net-next: remove ... |
1369 |
for (rt = w->leaf; rt; rt = rt->dst.rt6_next) { |
1da177e4c Linux-2.6.12-rc2 |
1370 1371 1372 |
res = c->func(rt, c->arg); if (res < 0) { w->leaf = rt; |
528c4ceb4 [IPV6]: Always pa... |
1373 |
res = fib6_del(rt, &info); |
1da177e4c Linux-2.6.12-rc2 |
1374 1375 1376 1377 1378 1379 1380 1381 1382 |
if (res) { #if RT6_DEBUG >= 2 printk(KERN_DEBUG "fib6_clean_node: del failed: rt=%p@%p err=%d ", rt, rt->rt6i_node, res); #endif continue; } return 0; } |
547b792ca net: convert BUG_... |
1383 |
WARN_ON(res != 0); |
1da177e4c Linux-2.6.12-rc2 |
1384 1385 1386 1387 1388 1389 1390 |
} w->leaf = rt; return 0; } /* * Convenient frontend to tree walker. |
1ab1457c4 [NET] IPV6: Fix w... |
1391 |
* |
1da177e4c Linux-2.6.12-rc2 |
1392 1393 1394 1395 1396 1397 1398 |
* func is called on each route. * It may return -1 -> delete this route. * 0 -> continue walking * * prune==1 -> only immediate children of node (certainly, * ignoring pure split nodes) will be scanned. */ |
ec7d43c29 [NETNS][IPV6] ip6... |
1399 |
static void fib6_clean_tree(struct net *net, struct fib6_node *root, |
8ce11e6a9 [NET]: Make code ... |
1400 1401 |
int (*func)(struct rt6_info *, void *arg), int prune, void *arg) |
1da177e4c Linux-2.6.12-rc2 |
1402 1403 1404 1405 1406 1407 |
{ struct fib6_cleaner_t c; c.w.root = root; c.w.func = fib6_clean_node; c.w.prune = prune; |
2bec5a369 ipv6: fib: fix cr... |
1408 1409 |
c.w.count = 0; c.w.skip = 0; |
1da177e4c Linux-2.6.12-rc2 |
1410 1411 |
c.func = func; c.arg = arg; |
ec7d43c29 [NETNS][IPV6] ip6... |
1412 |
c.net = net; |
1da177e4c Linux-2.6.12-rc2 |
1413 1414 1415 |
fib6_walk(&c.w); } |
32b293a53 IPv6: Avoid takin... |
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 |
void fib6_clean_all_ro(struct net *net, int (*func)(struct rt6_info *, void *arg), int prune, void *arg) { struct fib6_table *table; struct hlist_node *node; struct hlist_head *head; unsigned int h; rcu_read_lock(); for (h = 0; h < FIB6_TABLE_HASHSZ; h++) { head = &net->ipv6.fib_table_hash[h]; hlist_for_each_entry_rcu(table, node, head, tb6_hlist) { read_lock_bh(&table->tb6_lock); fib6_clean_tree(net, &table->tb6_root, func, prune, arg); read_unlock_bh(&table->tb6_lock); } } rcu_read_unlock(); } |
f3db48517 [NETNS][IPV6] ip6... |
1436 |
void fib6_clean_all(struct net *net, int (*func)(struct rt6_info *, void *arg), |
c71099acc [IPV6]: Multiple ... |
1437 1438 |
int prune, void *arg) { |
c71099acc [IPV6]: Multiple ... |
1439 |
struct fib6_table *table; |
1b43af548 [IPV6]: Increase ... |
1440 |
struct hlist_node *node; |
58f09b78b [NETNS][IPV6] ip6... |
1441 |
struct hlist_head *head; |
1b43af548 [IPV6]: Increase ... |
1442 |
unsigned int h; |
c71099acc [IPV6]: Multiple ... |
1443 |
|
1b43af548 [IPV6]: Increase ... |
1444 |
rcu_read_lock(); |
a33bc5c15 xfrm: select sane... |
1445 |
for (h = 0; h < FIB6_TABLE_HASHSZ; h++) { |
f3db48517 [NETNS][IPV6] ip6... |
1446 |
head = &net->ipv6.fib_table_hash[h]; |
58f09b78b [NETNS][IPV6] ip6... |
1447 |
hlist_for_each_entry_rcu(table, node, head, tb6_hlist) { |
c71099acc [IPV6]: Multiple ... |
1448 |
write_lock_bh(&table->tb6_lock); |
ec7d43c29 [NETNS][IPV6] ip6... |
1449 1450 |
fib6_clean_tree(net, &table->tb6_root, func, prune, arg); |
c71099acc [IPV6]: Multiple ... |
1451 1452 1453 |
write_unlock_bh(&table->tb6_lock); } } |
1b43af548 [IPV6]: Increase ... |
1454 |
rcu_read_unlock(); |
c71099acc [IPV6]: Multiple ... |
1455 |
} |
1da177e4c Linux-2.6.12-rc2 |
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 |
static int fib6_prune_clone(struct rt6_info *rt, void *arg) { if (rt->rt6i_flags & RTF_CACHE) { RT6_TRACE("pruning clone %p ", rt); return -1; } return 0; } |
ec7d43c29 [NETNS][IPV6] ip6... |
1466 1467 |
static void fib6_prune_clones(struct net *net, struct fib6_node *fn, struct rt6_info *rt) |
1da177e4c Linux-2.6.12-rc2 |
1468 |
{ |
ec7d43c29 [NETNS][IPV6] ip6... |
1469 |
fib6_clean_tree(net, fn, fib6_prune_clone, 1, rt); |
1da177e4c Linux-2.6.12-rc2 |
1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 |
} /* * Garbage collection */ static struct fib6_gc_args { int timeout; int more; } gc_args; static int fib6_age(struct rt6_info *rt, void *arg) { unsigned long now = jiffies; /* * check addrconf expiration here. * Routes are expired even if they are in use. * * Also age clones. Note, that clones are aged out * only if they are not in use now. */ |
d19185428 ipv6: Kill rt6i_d... |
1493 1494 |
if (rt->rt6i_flags & RTF_EXPIRES && rt->dst.expires) { if (time_after(now, rt->dst.expires)) { |
1da177e4c Linux-2.6.12-rc2 |
1495 1496 |
RT6_TRACE("expiring %p ", rt); |
1da177e4c Linux-2.6.12-rc2 |
1497 1498 1499 1500 |
return -1; } gc_args.more++; } else if (rt->rt6i_flags & RTF_CACHE) { |
d8d1f30b9 net-next: remove ... |
1501 1502 |
if (atomic_read(&rt->dst.__refcnt) == 0 && time_after_eq(now, rt->dst.lastuse + gc_args.timeout)) { |
1da177e4c Linux-2.6.12-rc2 |
1503 1504 1505 1506 |
RT6_TRACE("aging clone %p ", rt); return -1; } else if ((rt->rt6i_flags & RTF_GATEWAY) && |
272174550 net: Rename dst_g... |
1507 |
(!(dst_get_neighbour_noref_raw(&rt->dst)->flags & NTF_ROUTER))) { |
1da177e4c Linux-2.6.12-rc2 |
1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 |
RT6_TRACE("purging route %p via non-router but gateway ", rt); return -1; } gc_args.more++; } return 0; } static DEFINE_SPINLOCK(fib6_gc_lock); |
5b7c931df [NETNS][IPV6] ip6... |
1520 |
void fib6_run_gc(unsigned long expires, struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1521 |
{ |
5b7c931df [NETNS][IPV6] ip6... |
1522 |
if (expires != ~0UL) { |
1da177e4c Linux-2.6.12-rc2 |
1523 |
spin_lock_bh(&fib6_gc_lock); |
5b7c931df [NETNS][IPV6] ip6... |
1524 1525 |
gc_args.timeout = expires ? (int)expires : net->ipv6.sysctl.ip6_rt_gc_interval; |
1da177e4c Linux-2.6.12-rc2 |
1526 |
} else { |
a76d7345a ipv6: use spin_tr... |
1527 |
if (!spin_trylock_bh(&fib6_gc_lock)) { |
417f28bb3 netns: dont alloc... |
1528 |
mod_timer(&net->ipv6.ip6_fib_timer, jiffies + HZ); |
1da177e4c Linux-2.6.12-rc2 |
1529 1530 |
return; } |
5b7c931df [NETNS][IPV6] ip6... |
1531 |
gc_args.timeout = net->ipv6.sysctl.ip6_rt_gc_interval; |
1da177e4c Linux-2.6.12-rc2 |
1532 |
} |
1da177e4c Linux-2.6.12-rc2 |
1533 |
|
3d0f24a74 ipv6: icmp6_dst_g... |
1534 |
gc_args.more = icmp6_dst_gc(); |
f3db48517 [NETNS][IPV6] ip6... |
1535 |
|
5b7c931df [NETNS][IPV6] ip6... |
1536 |
fib6_clean_all(net, fib6_age, 0, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1537 1538 |
if (gc_args.more) |
c8a452224 ipv6: use round_j... |
1539 1540 1541 |
mod_timer(&net->ipv6.ip6_fib_timer, round_jiffies(jiffies + net->ipv6.sysctl.ip6_rt_gc_interval)); |
417f28bb3 netns: dont alloc... |
1542 1543 |
else del_timer(&net->ipv6.ip6_fib_timer); |
1da177e4c Linux-2.6.12-rc2 |
1544 1545 |
spin_unlock_bh(&fib6_gc_lock); } |
5b7c931df [NETNS][IPV6] ip6... |
1546 1547 1548 1549 |
static void fib6_gc_timer_cb(unsigned long arg) { fib6_run_gc(0, (struct net *)arg); } |
2c8c1e729 net: spread __net... |
1550 |
static int __net_init fib6_net_init(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1551 |
{ |
10da66f75 fib: avoid false ... |
1552 |
size_t size = sizeof(struct hlist_head) * FIB6_TABLE_HASHSZ; |
417f28bb3 netns: dont alloc... |
1553 |
setup_timer(&net->ipv6.ip6_fib_timer, fib6_gc_timer_cb, (unsigned long)net); |
63152fc0d [NETNS][IPV6] ip6... |
1554 |
|
c572872f8 [NETNS][IPV6] rt6... |
1555 1556 1557 |
net->ipv6.rt6_stats = kzalloc(sizeof(*net->ipv6.rt6_stats), GFP_KERNEL); if (!net->ipv6.rt6_stats) goto out_timer; |
10da66f75 fib: avoid false ... |
1558 1559 1560 1561 |
/* Avoid false sharing : Use at least a full cache line */ size = max_t(size_t, size, L1_CACHE_BYTES); net->ipv6.fib_table_hash = kzalloc(size, GFP_KERNEL); |
58f09b78b [NETNS][IPV6] ip6... |
1562 |
if (!net->ipv6.fib_table_hash) |
c572872f8 [NETNS][IPV6] rt6... |
1563 |
goto out_rt6_stats; |
e0b85590b [NETNS][IPV6] ip6... |
1564 |
|
58f09b78b [NETNS][IPV6] ip6... |
1565 1566 1567 |
net->ipv6.fib6_main_tbl = kzalloc(sizeof(*net->ipv6.fib6_main_tbl), GFP_KERNEL); if (!net->ipv6.fib6_main_tbl) |
e0b85590b [NETNS][IPV6] ip6... |
1568 |
goto out_fib_table_hash; |
58f09b78b [NETNS][IPV6] ip6... |
1569 |
net->ipv6.fib6_main_tbl->tb6_id = RT6_TABLE_MAIN; |
8ed677896 [NETNS][IPV6] rt6... |
1570 |
net->ipv6.fib6_main_tbl->tb6_root.leaf = net->ipv6.ip6_null_entry; |
58f09b78b [NETNS][IPV6] ip6... |
1571 1572 |
net->ipv6.fib6_main_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; |
e0b85590b [NETNS][IPV6] ip6... |
1573 1574 |
#ifdef CONFIG_IPV6_MULTIPLE_TABLES |
58f09b78b [NETNS][IPV6] ip6... |
1575 1576 1577 |
net->ipv6.fib6_local_tbl = kzalloc(sizeof(*net->ipv6.fib6_local_tbl), GFP_KERNEL); if (!net->ipv6.fib6_local_tbl) |
e0b85590b [NETNS][IPV6] ip6... |
1578 |
goto out_fib6_main_tbl; |
58f09b78b [NETNS][IPV6] ip6... |
1579 |
net->ipv6.fib6_local_tbl->tb6_id = RT6_TABLE_LOCAL; |
8ed677896 [NETNS][IPV6] rt6... |
1580 |
net->ipv6.fib6_local_tbl->tb6_root.leaf = net->ipv6.ip6_null_entry; |
58f09b78b [NETNS][IPV6] ip6... |
1581 1582 |
net->ipv6.fib6_local_tbl->tb6_root.fn_flags = RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO; |
e0b85590b [NETNS][IPV6] ip6... |
1583 |
#endif |
58f09b78b [NETNS][IPV6] ip6... |
1584 |
fib6_tables_init(net); |
f845ab6b7 [IPV6] route6/fib... |
1585 |
|
417f28bb3 netns: dont alloc... |
1586 |
return 0; |
d63bddbe9 [IPV6]: Make fib6... |
1587 |
|
e0b85590b [NETNS][IPV6] ip6... |
1588 |
#ifdef CONFIG_IPV6_MULTIPLE_TABLES |
e0b85590b [NETNS][IPV6] ip6... |
1589 |
out_fib6_main_tbl: |
58f09b78b [NETNS][IPV6] ip6... |
1590 |
kfree(net->ipv6.fib6_main_tbl); |
e0b85590b [NETNS][IPV6] ip6... |
1591 |
#endif |
e0b85590b [NETNS][IPV6] ip6... |
1592 |
out_fib_table_hash: |
58f09b78b [NETNS][IPV6] ip6... |
1593 |
kfree(net->ipv6.fib_table_hash); |
c572872f8 [NETNS][IPV6] rt6... |
1594 1595 |
out_rt6_stats: kfree(net->ipv6.rt6_stats); |
63152fc0d [NETNS][IPV6] ip6... |
1596 |
out_timer: |
417f28bb3 netns: dont alloc... |
1597 |
return -ENOMEM; |
58f09b78b [NETNS][IPV6] ip6... |
1598 1599 1600 1601 |
} static void fib6_net_exit(struct net *net) { |
8ed677896 [NETNS][IPV6] rt6... |
1602 |
rt6_ifdown(net, NULL); |
417f28bb3 netns: dont alloc... |
1603 |
del_timer_sync(&net->ipv6.ip6_fib_timer); |
58f09b78b [NETNS][IPV6] ip6... |
1604 1605 1606 1607 1608 |
#ifdef CONFIG_IPV6_MULTIPLE_TABLES kfree(net->ipv6.fib6_local_tbl); #endif kfree(net->ipv6.fib6_main_tbl); kfree(net->ipv6.fib_table_hash); |
c572872f8 [NETNS][IPV6] rt6... |
1609 |
kfree(net->ipv6.rt6_stats); |
58f09b78b [NETNS][IPV6] ip6... |
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 |
} static struct pernet_operations fib6_net_ops = { .init = fib6_net_init, .exit = fib6_net_exit, }; int __init fib6_init(void) { int ret = -ENOMEM; |
63152fc0d [NETNS][IPV6] ip6... |
1620 |
|
58f09b78b [NETNS][IPV6] ip6... |
1621 1622 1623 1624 1625 1626 1627 1628 1629 |
fib6_node_kmem = kmem_cache_create("fib6_nodes", sizeof(struct fib6_node), 0, SLAB_HWCACHE_ALIGN, NULL); if (!fib6_node_kmem) goto out; ret = register_pernet_subsys(&fib6_net_ops); if (ret) |
c572872f8 [NETNS][IPV6] rt6... |
1630 |
goto out_kmem_cache_create; |
58f09b78b [NETNS][IPV6] ip6... |
1631 |
|
c7ac8679b rtnetlink: Comput... |
1632 1633 |
ret = __rtnl_register(PF_INET6, RTM_GETROUTE, NULL, inet6_dump_fib, NULL); |
58f09b78b [NETNS][IPV6] ip6... |
1634 1635 1636 1637 1638 1639 1640 |
if (ret) goto out_unregister_subsys; out: return ret; out_unregister_subsys: unregister_pernet_subsys(&fib6_net_ops); |
d63bddbe9 [IPV6]: Make fib6... |
1641 1642 1643 |
out_kmem_cache_create: kmem_cache_destroy(fib6_node_kmem); goto out; |
1da177e4c Linux-2.6.12-rc2 |
1644 1645 1646 1647 |
} void fib6_gc_cleanup(void) { |
58f09b78b [NETNS][IPV6] ip6... |
1648 |
unregister_pernet_subsys(&fib6_net_ops); |
1da177e4c Linux-2.6.12-rc2 |
1649 1650 |
kmem_cache_destroy(fib6_node_kmem); } |