diff options
| -rw-r--r-- | net/ipv6/ip6_fib.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 667b1b1..11f9660 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -80,6 +80,7 @@ static DEFINE_RWLOCK(fib6_walker_lock); #endif static void fib6_prune_clones(struct fib6_node *fn, struct rt6_info *rt); +static struct rt6_info * fib6_find_prefix(struct fib6_node *fn); static struct fib6_node * fib6_repair_tree(struct fib6_node *fn); static int fib6_walk(struct fib6_walker_t *w); static int fib6_walk_continue(struct fib6_walker_t *w); @@ -697,7 +698,7 @@ void fib6_force_start_gc(void) int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) { - struct fib6_node *fn; + struct fib6_node *fn, *pn = NULL; int err = -ENOMEM; fn = fib6_add_1(root, &rt->rt6i_dst.addr, sizeof(struct in6_addr), @@ -706,6 +707,8 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) if (fn == NULL) goto out; + pn = fn; + #ifdef CONFIG_IPV6_SUBTREES if (rt->rt6i_src.plen) { struct fib6_node *sn; @@ -751,10 +754,6 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) /* Now link new subtree to main tree */ sfn->parent = fn; fn->subtree = sfn; - if (fn->leaf == NULL) { - fn->leaf = rt; - atomic_inc(&rt->rt6i_ref); - } } else { sn = fib6_add_1(fn->subtree, &rt->rt6i_src.addr, sizeof(struct in6_addr), rt->rt6i_src.plen, @@ -764,6 +763,10 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) goto st_failure; } + if (fn->leaf == NULL) { + fn->leaf = rt; + atomic_inc(&rt->rt6i_ref); + } fn = sn; } #endif @@ -777,8 +780,25 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt, struct nl_info *info) } out: - if (err) + 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. + */ + if (pn != fn && !pn->leaf && !(pn->fn_flags & RTN_RTINFO)) { + pn->leaf = fib6_find_prefix(pn); +#if RT6_DEBUG >= 2 + if (!pn->leaf) { + BUG_TRAP(pn->leaf != NULL); + pn->leaf = &ip6_null_entry; + } +#endif + atomic_inc(&pn->leaf->rt6i_ref); + } +#endif dst_free(&rt->u.dst); + } return err; #ifdef CONFIG_IPV6_SUBTREES |
