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net: Fill in extack for mpls lwt encap

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Fill in extack for errors in build_state for mpls lwt encap including
passing extack to nla_get_labels and adding error messages for failures
in it.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern
2017-05-27 16:19:29 -06:00
committed by David S. Miller
parent 9ae2872748
commit a1f10abe12
3 changed files with 47 additions and 16 deletions
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net/mpls/internal.h
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@@ -203,7 +203,7 @@ static inline struct mpls_dev *mpls_dev_get(const struct net_device *dev)
int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels,
const u32 label[]);
int nla_get_labels(const struct nlattr *nla, u8 max_labels, u8 *labels,
u32 label[]);
u32 label[], struct netlink_ext_ack *extack);
int nla_get_via(const struct nlattr *nla, u8 *via_alen, u8 *via_table,
u8 via[]);
bool mpls_output_possible(const struct net_device *dev);