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| author | David Ahern <dsahern@gmail.com> | 2017-05-27 16:19:28 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-30 11:55:32 -0400 |
| commit | 9ae287274817c032a4428fde84d1ab26d6b96761 (patch) | |
| tree | 1adfdc9ae78f4dd242fd2918047647aa3895364b /net/core/lwtunnel.c | |
| parent | c255bd681d1a93fff2a2c249d91449cce830ac64 (diff) | |
| download | linux-9ae287274817c032a4428fde84d1ab26d6b96761.tar.gz linux-9ae287274817c032a4428fde84d1ab26d6b96761.tar.bz2 linux-9ae287274817c032a4428fde84d1ab26d6b96761.zip | |
net: add extack arg to lwtunnel build state
Pass extack arg down to lwtunnel_build_state and the build_state callbacks.
Add messages for failures in lwtunnel_build_state, and add the extarg to
nla_parse where possible in the build_state callbacks.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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); |