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authorRichard Gobert <richardbgobert@gmail.com>2024-01-03 15:40:44 +0100
committerJakub Kicinski <kuba@kernel.org>2024-01-05 08:11:49 -0800
commitf2e3fc2158e66d84af77f4818df47b607ded3a75 (patch)
tree11d07d98c9044da3c27f806e7a382812ed82a0f9
parentcb420106901ad038ea8b3c58fe26a5a465c40080 (diff)
net: gso: add HBH extension header offload support
This commit adds net_offload to IPv6 Hop-by-Hop extension headers (as it is done for routing and dstopts) since it is supported in GSO and GRO. This allows to remove specific HBH conditionals in GSO and GRO when pulling and parsing an incoming packet. Signed-off-by: Richard Gobert <richardbgobert@gmail.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/d4f8825a-1d55-4b12-9d67-a254dbbfa6ae@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--net/ipv6/exthdrs_offload.c11
-rw-r--r--net/ipv6/ip6_offload.c25
2 files changed, 22 insertions, 14 deletions
diff --git a/net/ipv6/exthdrs_offload.c b/net/ipv6/exthdrs_offload.c
index 06750d65d480..4c00398f4dca 100644
--- a/net/ipv6/exthdrs_offload.c
+++ b/net/ipv6/exthdrs_offload.c
@@ -16,6 +16,10 @@ static const struct net_offload dstopt_offload = {
.flags = INET6_PROTO_GSO_EXTHDR,
};
+static const struct net_offload hbh_offload = {
+ .flags = INET6_PROTO_GSO_EXTHDR,
+};
+
int __init ipv6_exthdrs_offload_init(void)
{
int ret;
@@ -28,9 +32,16 @@ int __init ipv6_exthdrs_offload_init(void)
if (ret)
goto out_rt;
+ ret = inet6_add_offload(&hbh_offload, IPPROTO_HOPOPTS);
+ if (ret)
+ goto out_dstopts;
+
out:
return ret;
+out_dstopts:
+ inet6_del_offload(&dstopt_offload, IPPROTO_DSTOPTS);
+
out_rt:
inet6_del_offload(&rthdr_offload, IPPROTO_ROUTING);
goto out;
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index d6314287338d..0e0b5fed0995 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -45,15 +45,13 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
struct ipv6_opt_hdr *opth;
int len;
- if (proto != NEXTHDR_HOP) {
- ops = rcu_dereference(inet6_offloads[proto]);
+ ops = rcu_dereference(inet6_offloads[proto]);
- if (unlikely(!ops))
- break;
+ if (unlikely(!ops))
+ break;
- if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
- break;
- }
+ if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
+ break;
if (unlikely(!pskb_may_pull(skb, 8)))
break;
@@ -171,13 +169,12 @@ static int ipv6_exthdrs_len(struct ipv6hdr *iph,
proto = iph->nexthdr;
for (;;) {
- if (proto != NEXTHDR_HOP) {
- *opps = rcu_dereference(inet6_offloads[proto]);
- if (unlikely(!(*opps)))
- break;
- if (!((*opps)->flags & INET6_PROTO_GSO_EXTHDR))
- break;
- }
+ *opps = rcu_dereference(inet6_offloads[proto]);
+ if (unlikely(!(*opps)))
+ break;
+ if (!((*opps)->flags & INET6_PROTO_GSO_EXTHDR))
+ break;
+
opth = (void *)opth + optlen;
optlen = ipv6_optlen(opth);
len += optlen;