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net: vrf: Add extack messages for newlink failures

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Add extack error messages for failure paths creating vrf devices. Once
extack support is added to iproute2, we go from the unhelpful:
    $  ip li add foobar type vrf
    RTNETLINK answers: Invalid argument

to:
    $ ip li add foobar type vrf
    Error: VRF table id is missing

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Ahern 2017-08-07 10:08:10 -07:00 committed by David S. Miller
parent 733a707d6c
commit 53b9483565
1 changed files with 13 additions and 4 deletions
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17
drivers/net/vrf.c
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@ -1371,10 +1371,14 @@ static int vrf_validate(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
if (tb[IFLA_ADDRESS]) {
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
NL_SET_ERR_MSG(extack, "Invalid hardware address");
return -EINVAL;
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
}
if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
NL_SET_ERR_MSG(extack, "Invalid hardware address");
return -EADDRNOTAVAIL;
}
}
return 0;
}
@ -1399,12 +1403,17 @@ static int vrf_newlink(struct net *src_net, struct net_device *dev,
struct net *net;
int err;
if (!data || !data[IFLA_VRF_TABLE])
if (!data || !data[IFLA_VRF_TABLE]) {
NL_SET_ERR_MSG(extack, "VRF table id is missing");
return -EINVAL;
}
vrf->tb_id = nla_get_u32(data[IFLA_VRF_TABLE]);
if (vrf->tb_id == RT_TABLE_UNSPEC)
if (vrf->tb_id == RT_TABLE_UNSPEC) {
NL_SET_ERR_MSG_ATTR(extack, data[IFLA_VRF_TABLE],
"Invalid VRF table id");
return -EINVAL;
}
dev->priv_flags |= IFF_L3MDEV_MASTER;