diff options
| -rw-r--r-- | net/ipv4/fib_trie.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 441c4eafb9e0..f1005fe17898 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1917,35 +1917,43 @@ static int fn_trie_dump_leaf(struct leaf *l, struct fib_table *tb, return skb->len; } - - static int fn_trie_dump(struct fib_table *tb, struct sk_buff *skb, struct netlink_callback *cb) { struct leaf *l; struct trie *t = (struct trie *) tb->tb_data; - int h = 0; - int s_h = cb->args[2]; + t_key key = cb->args[2]; rcu_read_lock(); - for (h = 0, l = trie_firstleaf(t); l != NULL; h++, l = trie_nextleaf(l)) { - if (h < s_h) - continue; - - if (h > s_h) { - cb->args[3] = 0; - cb->args[4] = 0; + /* Dump starting at last key. + * Note: 0.0.0.0/0 (ie default) is first key. + */ + if (!key) + l = trie_firstleaf(t); + else { + l = fib_find_node(t, key); + if (!l) { + /* The table changed during the dump, rather than + * giving partial data, just make application retry. + */ + rcu_read_unlock(); + return -EBUSY; } + } + while (l) { + cb->args[2] = l->key; if (fn_trie_dump_leaf(l, tb, skb, cb) < 0) { rcu_read_unlock(); - cb->args[2] = h; return -1; } + + l = trie_nextleaf(l); + memset(&cb->args[3], 0, + sizeof(cb->args) - 3*sizeof(cb->args[0])); } rcu_read_unlock(); - cb->args[2] = h; return skb->len; } |