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authorAlexey Kodanev <alexey.kodanev@oracle.com>2015-03-13 19:13:53 +0300
committerDavid S. Miller <davem@davemloft.net>2015-03-13 20:08:07 +0300
commit40fb70f3aa0a67d28a30c854d4e7aa10b0511db9 (patch)
treea6aa7450acf5919c7ff1eabca584881e70819672 /include/net/vxlan.h
parentb57578b3d5f53016c18a9ae5365cc6e05cd70c7a (diff)
downloadlinux-40fb70f3aa0a67d28a30c854d4e7aa10b0511db9.tar.xz
vxlan: fix wrong usage of VXLAN_VID_MASK
commit dfd8645ea1bd9127 wrongly assumes that VXLAN_VDI_MASK includes eight lower order reserved bits of VNI field that are using for remote checksum offload. Right now, when VNI number greater then 0xffff, vxlan_udp_encap_recv() will always return with 'bad_flag' error, reducing the usable vni range from 0..16777215 to 0..65535. Also, it doesn't really check whether RCO bits processed or not. Fix it by adding new VNI mask which has all 32 bits of VNI field: 24 bits for id and 8 bits for other usage. Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/vxlan.h')
-rw-r--r--include/net/vxlan.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h
index eabd3a038674..c73e7abbbaa5 100644
--- a/include/net/vxlan.h
+++ b/include/net/vxlan.h
@@ -91,6 +91,7 @@ struct vxlanhdr {
#define VXLAN_N_VID (1u << 24)
#define VXLAN_VID_MASK (VXLAN_N_VID - 1)
+#define VXLAN_VNI_MASK (VXLAN_VID_MASK << 8)
#define VXLAN_HLEN (sizeof(struct udphdr) + sizeof(struct vxlanhdr))
struct vxlan_metadata {