diff options
Diffstat (limited to 'net/ipv6/ip6_fib.c')
| -rw-r--r-- | net/ipv6/ip6_fib.c | 71 |
1 files changed, 40 insertions, 31 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index a64d559fa513..e31118f417b4 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -107,16 +107,13 @@ enum { void fib6_update_sernum(struct rt6_info *rt) { - struct fib6_table *table = rt->rt6i_table; struct net *net = dev_net(rt->dst.dev); struct fib6_node *fn; - spin_lock_bh(&table->tb6_lock); fn = rcu_dereference_protected(rt->rt6i_node, - lockdep_is_held(&table->tb6_lock)); + lockdep_is_held(&rt->rt6i_table->tb6_lock)); if (fn) fn->fn_sernum = fib6_new_sernum(net); - spin_unlock_bh(&table->tb6_lock); } /* @@ -799,12 +796,6 @@ insert_above: return ln; } -static bool rt6_qualify_for_ecmp(struct rt6_info *rt) -{ - return (rt->rt6i_flags & (RTF_GATEWAY|RTF_ADDRCONF|RTF_DYNAMIC)) == - RTF_GATEWAY; -} - static void fib6_copy_metrics(u32 *mp, const struct mx6_config *mxc) { int i; @@ -994,6 +985,7 @@ next_iter: rt6i_nsiblings++; } BUG_ON(rt6i_nsiblings != rt->rt6i_nsiblings); + rt6_multipath_rebalance(temp_sibling); } /* @@ -1102,8 +1094,8 @@ void fib6_force_start_gc(struct net *net) jiffies + net->ipv6.sysctl.ip6_rt_gc_interval); } -static void fib6_update_sernum_upto_root(struct rt6_info *rt, - int sernum) +static void __fib6_update_sernum_upto_root(struct rt6_info *rt, + int sernum) { struct fib6_node *fn = rcu_dereference_protected(rt->rt6i_node, lockdep_is_held(&rt->rt6i_table->tb6_lock)); @@ -1117,6 +1109,11 @@ static void fib6_update_sernum_upto_root(struct rt6_info *rt, } } +void fib6_update_sernum_upto_root(struct net *net, struct rt6_info *rt) +{ + __fib6_update_sernum_upto_root(rt, fib6_new_sernum(net)); +} + /* * Add routing information to the routing tree. * <destination addr>/<source addr> @@ -1230,7 +1227,7 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, err = fib6_add_rt2node(fn, rt, info, mxc, extack); if (!err) { - fib6_update_sernum_upto_root(rt, sernum); + __fib6_update_sernum_upto_root(rt, sernum); fib6_start_gc(info->nl_net, rt); } @@ -1241,23 +1238,28 @@ out: * 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. */ - struct rt6_info *pn_leaf = rcu_dereference_protected(pn->leaf, - lockdep_is_held(&table->tb6_lock)); - if (pn != fn && pn_leaf == rt) { - pn_leaf = NULL; - RCU_INIT_POINTER(pn->leaf, NULL); - atomic_dec(&rt->rt6i_ref); - } - if (pn != fn && !pn_leaf && !(pn->fn_flags & RTN_RTINFO)) { - pn_leaf = fib6_find_prefix(info->nl_net, table, pn); -#if RT6_DEBUG >= 2 - if (!pn_leaf) { - WARN_ON(!pn_leaf); - pn_leaf = info->nl_net->ipv6.ip6_null_entry; + if (pn != fn) { + struct rt6_info *pn_leaf = + rcu_dereference_protected(pn->leaf, + lockdep_is_held(&table->tb6_lock)); + if (pn_leaf == rt) { + pn_leaf = NULL; + RCU_INIT_POINTER(pn->leaf, NULL); + atomic_dec(&rt->rt6i_ref); } + if (!pn_leaf && !(pn->fn_flags & RTN_RTINFO)) { + pn_leaf = fib6_find_prefix(info->nl_net, table, + pn); +#if RT6_DEBUG >= 2 + if (!pn_leaf) { + WARN_ON(!pn_leaf); + pn_leaf = + info->nl_net->ipv6.ip6_null_entry; + } #endif - atomic_inc(&pn_leaf->rt6i_ref); - rcu_assign_pointer(pn->leaf, pn_leaf); + atomic_inc(&pn_leaf->rt6i_ref); + rcu_assign_pointer(pn->leaf, pn_leaf); + } } #endif goto failure; @@ -1665,6 +1667,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn, sibling->rt6i_nsiblings--; rt->rt6i_nsiblings = 0; list_del_init(&rt->rt6i_siblings); + rt6_multipath_rebalance(next_sibling); } /* Adjust walkers */ @@ -1887,7 +1890,7 @@ static int fib6_clean_node(struct fib6_walker *w) for_each_fib6_walker_rt(w) { res = c->func(rt, c->arg); - if (res < 0) { + if (res == -1) { w->leaf = rt; res = fib6_del(rt, &info); if (res) { @@ -1900,6 +1903,12 @@ static int fib6_clean_node(struct fib6_walker *w) continue; } return 0; + } else if (res == -2) { + if (WARN_ON(!rt->rt6i_nsiblings)) + continue; + rt = list_last_entry(&rt->rt6i_siblings, + struct rt6_info, rt6i_siblings); + continue; } WARN_ON(res != 0); } @@ -1911,7 +1920,8 @@ static int fib6_clean_node(struct fib6_walker *w) * Convenient frontend to tree walker. * * func is called on each route. - * It may return -1 -> delete this route. + * It may return -2 -> skip multipath route. + * -1 -> delete this route. * 0 -> continue walking */ @@ -2103,7 +2113,6 @@ static void fib6_net_exit(struct net *net) { unsigned int i; - rt6_ifdown(net, NULL); del_timer_sync(&net->ipv6.ip6_fib_timer); for (i = 0; i < FIB6_TABLE_HASHSZ; i++) { |