diff options
Diffstat (limited to 'net/core/lwtunnel.c')
| -rw-r--r-- | net/core/lwtunnel.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/net/core/lwtunnel.c b/net/core/lwtunnel.c index ab840386a74d..d9cb3532f1dd 100644 --- a/net/core/lwtunnel.c +++ b/net/core/lwtunnel.c @@ -103,25 +103,39 @@ EXPORT_SYMBOL(lwtunnel_encap_del_ops); int lwtunnel_build_state(u16 encap_type, struct nlattr *encap, unsigned int family, - const void *cfg, struct lwtunnel_state **lws) + const void *cfg, struct lwtunnel_state **lws, + struct netlink_ext_ack *extack) { const struct lwtunnel_encap_ops *ops; + bool found = false; int ret = -EINVAL; if (encap_type == LWTUNNEL_ENCAP_NONE || - encap_type > LWTUNNEL_ENCAP_MAX) + encap_type > LWTUNNEL_ENCAP_MAX) { + NL_SET_ERR_MSG_ATTR(extack, encap, + "Unknown LWT encapsulation type"); return ret; + } ret = -EOPNOTSUPP; rcu_read_lock(); ops = rcu_dereference(lwtun_encaps[encap_type]); if (likely(ops && ops->build_state && try_module_get(ops->owner))) { - ret = ops->build_state(encap, family, cfg, lws); + found = true; + ret = ops->build_state(encap, family, cfg, lws, extack); if (ret) module_put(ops->owner); } rcu_read_unlock(); + /* don't rely on -EOPNOTSUPP to detect match as build_state + * handlers could return it + */ + if (!found) { + NL_SET_ERR_MSG_ATTR(extack, encap, + "LWT encapsulation type not supported"); + } + return ret; } EXPORT_SYMBOL(lwtunnel_build_state); |