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vxlan: add extack support for create and changelink

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This patch adds extack coverage in vxlan link
create and changelink paths. Introduces a new helper
vxlan_nl2flags to consolidate flag attribute validation.

thanks to Johannes Berg for some tips to construct the
generic vxlan flag extack strings.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu
2019-02-25 22:03:01 -08:00
committed by David S. Miller
parent 703bdcbc8e
commit 70fb082880
2 changed files with 172 additions and 67 deletions
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31
include/net/vxlan.h
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@@ -453,4 +453,35 @@ vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
}
#endif
static inline void vxlan_flag_attr_error(int attrtype,
struct netlink_ext_ack *extack)
{
#define VXLAN_FLAG(flg) \
case IFLA_VXLAN_##flg: \
NL_SET_ERR_MSG_MOD(extack, \
"cannot change " #flg " flag"); \
break
switch (attrtype) {
VXLAN_FLAG(TTL_INHERIT);
VXLAN_FLAG(LEARNING);
VXLAN_FLAG(PROXY);
VXLAN_FLAG(RSC);
VXLAN_FLAG(L2MISS);
VXLAN_FLAG(L3MISS);
VXLAN_FLAG(COLLECT_METADATA);
VXLAN_FLAG(UDP_ZERO_CSUM6_TX);
VXLAN_FLAG(UDP_ZERO_CSUM6_RX);
VXLAN_FLAG(REMCSUM_TX);
VXLAN_FLAG(REMCSUM_RX);
VXLAN_FLAG(GBP);
VXLAN_FLAG(GPE);
VXLAN_FLAG(REMCSUM_NOPARTIAL);
default:
NL_SET_ERR_MSG_MOD(extack, \
"cannot change flag");
break;
}
#undef VXLAN_FLAG
}
#endif