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openvswitch: use mpls_hdr

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skb_mpls_header is equivalent to mpls_hdr now. Use the existing helper
instead.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2016-09-30 19:08:07 +02:00 committed by David S. Miller
parent 9095e10edd
commit 85de4a2101
2 changed files with 12 additions and 24 deletions
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12
include/net/mpls.h
View file

@ -33,16 +33,4 @@ static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
{
return (struct mpls_shim_hdr *)skb_network_header(skb);
}
/*
* For non-MPLS skbs this will correspond to the network header.
* For MPLS skbs it will be before the network_header as the MPLS
* label stack lies between the end of the mac header and the network
* header. That is, for MPLS skbs the end of the mac header
* is the top of the MPLS label stack.
*/
static inline unsigned char *skb_mpls_header(struct sk_buff *skb)
{
return skb_mac_header(skb) + skb->mac_len;
}
#endif

24
net/openvswitch/actions.c
View file

@ -160,7 +160,7 @@ static void update_ethertype(struct sk_buff *skb, struct ethhdr *hdr,
static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_mpls *mpls)
{
__be32 *new_mpls_lse;
struct mpls_shim_hdr *new_mpls_lse;
/* Networking stack do not allow simultaneous Tunnel and MPLS GSO. */
if (skb->encapsulation)
@ -180,8 +180,8 @@ static int push_mpls(struct sk_buff *skb, struct sw_flow_key *key,
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb->mac_len);
new_mpls_lse = (__be32 *)skb_mpls_header(skb);
*new_mpls_lse = mpls->mpls_lse;
new_mpls_lse = mpls_hdr(skb);
new_mpls_lse->label_stack_entry = mpls->mpls_lse;
skb_postpush_rcsum(skb, new_mpls_lse, MPLS_HLEN);
@ -202,7 +202,7 @@ static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
if (unlikely(err))
return err;
skb_postpull_rcsum(skb, skb_mpls_header(skb), MPLS_HLEN);
skb_postpull_rcsum(skb, mpls_hdr(skb), MPLS_HLEN);
memmove(skb_mac_header(skb) + MPLS_HLEN, skb_mac_header(skb),
skb->mac_len);
@ -211,10 +211,10 @@ static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb->mac_len);
/* skb_mpls_header() is used to locate the ethertype
* field correctly in the presence of VLAN tags.
/* mpls_hdr() is used to locate the ethertype field correctly in the
* presence of VLAN tags.
*/
hdr = (struct ethhdr *)(skb_mpls_header(skb) - ETH_HLEN);
hdr = (struct ethhdr *)((void *)mpls_hdr(skb) - ETH_HLEN);
update_ethertype(skb, hdr, ethertype);
if (eth_p_mpls(skb->protocol))
skb->protocol = ethertype;
@ -226,7 +226,7 @@ static int pop_mpls(struct sk_buff *skb, struct sw_flow_key *key,
static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key,
const __be32 *mpls_lse, const __be32 *mask)
{
__be32 *stack;
struct mpls_shim_hdr *stack;
__be32 lse;
int err;
@ -234,16 +234,16 @@ static int set_mpls(struct sk_buff *skb, struct sw_flow_key *flow_key,
if (unlikely(err))
return err;
stack = (__be32 *)skb_mpls_header(skb);
lse = OVS_MASKED(*stack, *mpls_lse, *mask);
stack = mpls_hdr(skb);
lse = OVS_MASKED(stack->label_stack_entry, *mpls_lse, *mask);
if (skb->ip_summed == CHECKSUM_COMPLETE) {
__be32 diff[] = { ~(*stack), lse };
__be32 diff[] = { ~(stack->label_stack_entry), lse };
skb->csum = ~csum_partial((char *)diff, sizeof(diff),
~skb->csum);
}
*stack = lse;
stack->label_stack_entry = lse;
flow_key->mpls.top_lse = lse;
return 0;
}