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vxlan: Improve support for header flags

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This patch cleans up the header flags of VXLAN in anticipation of
defining some new ones:

- Move header related definitions from vxlan.c to vxlan.h
- Change VXLAN_FLAGS to be VXLAN_HF_VNI (only currently defined flag)
- Move check for unknown flags to after we find vxlan_sock, this
  assumes that some flags may be processed based on tunnel
  configuration
- Add a comment about why the stack treating unknown set flags as an
  error instead of ignoring them

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-01-08 12:31:18 -08:00 • committed by David S. Miller
parent eee2f04b80
commit 3bf3947526
2 changed files with 35 additions and 14 deletions
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7
include/net/vxlan.h
View file

@ -17,6 +17,13 @@ struct vxlanhdr {
__be32 vx_vni;
};
/* VXLAN header flags. */
#define VXLAN_HF_VNI 0x08000000
#define VXLAN_N_VID (1u << 24)
#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
struct vxlan_sock;
typedef void (vxlan_rcv_t)(struct vxlan_sock *vh, struct sk_buff *skb, __be32 key);