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-rw-r--r--net/ipv4/fib_trie.c34
1 files changed, 21 insertions, 13 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 441c4eafb9e..f1005fe1789 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;
}