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vxlan: Use checksum partial with remote checksum offload

Browse source 
Change remote checksum handling to set checksum partial as default
behavior. Added an iflink parameter to configure not using
checksum partial (calling csum_partial to update checksum).

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-02-10 16:30:32 -08:00 committed by David S. Miller
parent 15e2396d4e
commit 0ace2ca89c
3 changed files with 23 additions and 7 deletions
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25
drivers/net/vxlan.c
View file

@ -555,7 +555,8 @@ static int vxlan_fdb_append(struct vxlan_fdb *f,
static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
unsigned int off,
struct vxlanhdr *vh, size_t hdrlen,
u32 data, struct gro_remcsum *grc)
u32 data, struct gro_remcsum *grc,
bool nopartial)
{
size_t start, offset, plen;
@ -580,7 +581,7 @@ static struct vxlanhdr *vxlan_gro_remcsum(struct sk_buff *skb,
}
skb_gro_remcsum_process(skb, (void *)vh + hdrlen,
start, offset, grc, true);
start, offset, grc, nopartial);
skb->remcsum_offload = 1;
@ -618,7 +619,9 @@ static struct sk_buff **vxlan_gro_receive(struct sk_buff **head,
if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
vh = vxlan_gro_remcsum(skb, off_vx, vh, sizeof(struct vxlanhdr),
ntohl(vh->vx_vni), &grc);
ntohl(vh->vx_vni), &grc,
!!(vs->flags &
VXLAN_F_REMCSUM_NOPARTIAL));
if (!vh)
goto out;
@ -1155,7 +1158,7 @@ static void vxlan_igmp_leave(struct work_struct *work)
}
static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
size_t hdrlen, u32 data)
size_t hdrlen, u32 data, bool nopartial)
{
size_t start, offset, plen;
@ -1171,7 +1174,8 @@ static struct vxlanhdr *vxlan_remcsum(struct sk_buff *skb, struct vxlanhdr *vh,
vh = (struct vxlanhdr *)(udp_hdr(skb) + 1);
skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset, true);
skb_remcsum_process(skb, (void *)vh + hdrlen, start, offset,
nopartial);
return vh;
}
@ -1208,7 +1212,8 @@ static int vxlan_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
goto drop;
if ((flags & VXLAN_HF_RCO) && (vs->flags & VXLAN_F_REMCSUM_RX)) {
vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni);
vxh = vxlan_remcsum(skb, vxh, sizeof(struct vxlanhdr), vni,
!!(vs->flags & VXLAN_F_REMCSUM_NOPARTIAL));
if (!vxh)
goto drop;
@ -2437,6 +2442,7 @@ static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
[IFLA_VXLAN_REMCSUM_TX] = { .type = NLA_U8 },
[IFLA_VXLAN_REMCSUM_RX] = { .type = NLA_U8 },
[IFLA_VXLAN_GBP] = { .type = NLA_FLAG, },
[IFLA_VXLAN_REMCSUM_NOPARTIAL] = { .type = NLA_FLAG },
};
static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[])
@ -2760,6 +2766,9 @@ static int vxlan_newlink(struct net *src_net, struct net_device *dev,
if (data[IFLA_VXLAN_GBP])
vxlan->flags |= VXLAN_F_GBP;
if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL])
vxlan->flags |= VXLAN_F_REMCSUM_NOPARTIAL;
if (vxlan_find_vni(src_net, vni, use_ipv6 ? AF_INET6 : AF_INET,
vxlan->dst_port, vxlan->flags)) {
pr_info("duplicate VNI %u\n", vni);
@ -2909,6 +2918,10 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
nla_put_flag(skb, IFLA_VXLAN_GBP))
goto nla_put_failure;
if (vxlan->flags & VXLAN_F_REMCSUM_NOPARTIAL &&
nla_put_flag(skb, IFLA_VXLAN_REMCSUM_NOPARTIAL))
goto nla_put_failure;
return 0;
nla_put_failure:

4
include/net/vxlan.h
View file

@ -128,13 +128,15 @@ struct vxlan_sock {
#define VXLAN_F_REMCSUM_TX 0x200
#define VXLAN_F_REMCSUM_RX 0x400
#define VXLAN_F_GBP 0x800
#define VXLAN_F_REMCSUM_NOPARTIAL 0x1000
/* Flags that are used in the receive patch. These flags must match in
* order for a socket to be shareable
*/
#define VXLAN_F_RCV_FLAGS (VXLAN_F_GBP | \
VXLAN_F_UDP_ZERO_CSUM6_RX | \
VXLAN_F_REMCSUM_RX)
VXLAN_F_REMCSUM_RX | \
VXLAN_F_REMCSUM_NOPARTIAL)
struct vxlan_sock *vxlan_sock_add(struct net *net, __be16 port,
vxlan_rcv_t *rcv, void *data,

1
include/uapi/linux/if_link.h
View file

@ -374,6 +374,7 @@ enum {
IFLA_VXLAN_REMCSUM_TX,
IFLA_VXLAN_REMCSUM_RX,
IFLA_VXLAN_GBP,
IFLA_VXLAN_REMCSUM_NOPARTIAL,
__IFLA_VXLAN_MAX
};
#define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)