diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2012-11-09 13:35:24 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-13 14:36:50 -0500 |
| commit | 52b702ffa509595c5d04a1a1d0f63acf92b4789b (patch) | |
| tree | 80303edb068697a49d4936575e3b2c49e8d1976e /drivers/net/vxlan.c | |
| parent | bd090dfc634ddd711a5fbd0cadc6e0ab4977bcaf (diff) | |
| download | linux-52b702ffa509595c5d04a1a1d0f63acf92b4789b.tar.bz2 | |
vxlan: Fix error that was resulting in VXLAN MTU size being 10 bytes too large
This change fixes an issue I found where VXLAN frames were fragmented when
they were up to the VXLAN MTU size. I root caused the issue to the fact that
the headroom was 4 + 20 + 8 + 8. This math doesn't appear to be correct
because we are not inserting a VLAN header, but instead a 2nd Ethernet header.
As such the math for the overhead should be 20 + 8 + 8 + 14 to account for the
extra headers that are inserted for VXLAN.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vxlan.c')
| -rw-r--r-- | drivers/net/vxlan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 7b4adde93c01..0c4d0f49ab46 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -50,8 +50,8 @@ #define VXLAN_N_VID (1u << 24) #define VXLAN_VID_MASK (VXLAN_N_VID - 1) -/* VLAN + IP header + UDP + VXLAN */ -#define VXLAN_HEADROOM (4 + 20 + 8 + 8) +/* IP header + UDP + VXLAN + Ethernet header */ +#define VXLAN_HEADROOM (20 + 8 + 8 + 14) #define VXLAN_FLAGS 0x08000000 /* struct vxlanhdr.vx_flags required value. */ |