[PATCH net] bpf: add get_next_key callback to LPM map

[Alexei Starovoitov]

map_get_next_key callback is mandatory. Supply dummy handler.

Fixes: b95a5c4db09b ("bpf: add a longest prefix match trie map implementation")
Reported-by: Dmitry Vyukov <dvyu...@google.com>
Signed-off-by: Alexei Starovoitov <a...@kernel.org>
---
 kernel/bpf/lpm_trie.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/bpf/lpm_trie.c b/kernel/bpf/lpm_trie.c
index 8bfe0afaee10..b37bd9ab7f57 100644
--- a/kernel/bpf/lpm_trie.c
+++ b/kernel/bpf/lpm_trie.c
@@ -500,9 +500,15 @@ static void trie_free(struct bpf_map *map)
        raw_spin_unlock(&trie->lock);
 }
 
+static int trie_get_next_key(struct bpf_map *map, void *key, void *next_key)
+{
+       return -ENOTSUPP;
+}
+
 static const struct bpf_map_ops trie_ops = {
        .map_alloc = trie_alloc,
        .map_free = trie_free,
+       .map_get_next_key = trie_get_next_key,
        .map_lookup_elem = trie_lookup_elem,
        .map_update_elem = trie_update_elem,
        .map_delete_elem = trie_delete_elem,
-- 
2.8.0