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authoremmanuel.grumbach@intel.com <emmanuel.grumbach@intel.com>2015-10-26 10:31:29 +0200
committerDavid S. Miller <davem@davemloft.net>2015-10-26 22:24:22 -0700
commit8941faa161b526199e55ca7764cf875383453612 (patch)
tree8c6b00aacf266432b12317de09ff5d89786423cd /net/core/tso.c
parent61b9da925a5e985afc268eb8184f1af3ef542422 (diff)
net: tso: add support for IPv6
Adding IPv6 for the TSO helper API is trivial: * Don't play with the id (which doesn't exist in IPv6) * Correctly update the payload_len (don't include the length of the IP header itself) Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/tso.c')
-rw-r--r--net/core/tso.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/net/core/tso.c b/net/core/tso.c
index 630b30b4fb53..5dca7ce8ee9f 100644
--- a/net/core/tso.c
+++ b/net/core/tso.c
@@ -1,4 +1,5 @@
#include <linux/export.h>
+#include <linux/if_vlan.h>
#include <net/ip.h>
#include <net/tso.h>
#include <asm/unaligned.h>
@@ -14,18 +15,24 @@ EXPORT_SYMBOL(tso_count_descs);
void tso_build_hdr(struct sk_buff *skb, char *hdr, struct tso_t *tso,
int size, bool is_last)
{
- struct iphdr *iph;
struct tcphdr *tcph;
int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
int mac_hdr_len = skb_network_offset(skb);
memcpy(hdr, skb->data, hdr_len);
- iph = (struct iphdr *)(hdr + mac_hdr_len);
- iph->id = htons(tso->ip_id);
- iph->tot_len = htons(size + hdr_len - mac_hdr_len);
+ if (!tso->ipv6) {
+ struct iphdr *iph = (void *)(hdr + mac_hdr_len);
+
+ iph->id = htons(tso->ip_id);
+ iph->tot_len = htons(size + hdr_len - mac_hdr_len);
+ tso->ip_id++;
+ } else {
+ struct ipv6hdr *iph = (void *)(hdr + mac_hdr_len);
+
+ iph->payload_len = htons(size + tcp_hdrlen(skb));
+ }
tcph = (struct tcphdr *)(hdr + skb_transport_offset(skb));
put_unaligned_be32(tso->tcp_seq, &tcph->seq);
- tso->ip_id++;
if (!is_last) {
/* Clear all special flags for not last packet */
@@ -61,6 +68,7 @@ void tso_start(struct sk_buff *skb, struct tso_t *tso)
tso->ip_id = ntohs(ip_hdr(skb)->id);
tso->tcp_seq = ntohl(tcp_hdr(skb)->seq);
tso->next_frag_idx = 0;
+ tso->ipv6 = vlan_get_protocol(skb) == htons(ETH_P_IPV6);
/* Build first data */
tso->size = skb_headlen(skb) - hdr_len;