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Date: Fri, 19 Apr 2024 17:35:40 +0200
From: Richard Gobert <richardbgobert@...il.com>
To: davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
dsahern@...nel.org,
willemdebruijn.kernel@...il.com,
alexander.duyck@...il.com,
aleksander.lobakin@...el.com,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Richard Gobert <richardbgobert@...il.com>
Subject: [PATCH net v2 1/3] net: gro: add {inner_}network_offset to napi_gro_cb
This patch adds network_offset and inner_network_offset to napi_gro_cb, and
makes sure both are set correctly. In the common path there's only one
write (skb_gro_reset_offset, which replaces skb_set_network_header).
Signed-off-by: Richard Gobert <richardbgobert@...il.com>
---
drivers/net/geneve.c | 1 +
drivers/net/vxlan/vxlan_core.c | 1 +
include/net/gro.h | 18 ++++++++++++++++--
net/8021q/vlan_core.c | 2 ++
net/core/gro.c | 1 +
net/ethernet/eth.c | 1 +
net/ipv4/af_inet.c | 5 +----
net/ipv4/gre_offload.c | 1 +
net/ipv6/ip6_offload.c | 8 ++++----
9 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 6c2835086b57..6549348cc24e 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -542,6 +542,7 @@ static struct sk_buff *geneve_gro_receive(struct sock *sk,
if (!ptype)
goto out;
+ NAPI_GRO_CB(skb)->inner_network_offset = hlen;
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
flush = 0;
diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index ba319fc21957..c649a82eeca7 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -754,6 +754,7 @@ static struct sk_buff *vxlan_gpe_gro_receive(struct sock *sk,
vh = vxlan_gro_prepare_receive(sk, head, skb, &grc);
if (vh) {
+ NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
if (!vxlan_parse_gpe_proto(vh, &protocol))
goto out;
ptype = gro_find_receive_by_type(protocol);
diff --git a/include/net/gro.h b/include/net/gro.h
index 50f1e403dbbb..1faff23b66e8 100644
--- a/include/net/gro.h
+++ b/include/net/gro.h
@@ -87,6 +87,15 @@ struct napi_gro_cb {
/* used to support CHECKSUM_COMPLETE for tunneling protocols */
__wsum csum;
+
+ /* L3 offsets */
+ union {
+ struct {
+ u16 network_offset;
+ u16 inner_network_offset;
+ };
+ u16 network_offsets[2];
+ };
};
#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
@@ -172,12 +181,17 @@ static inline void *skb_gro_header(struct sk_buff *skb, unsigned int hlen,
return ptr;
}
+static inline int skb_gro_network_offset(const struct sk_buff *skb)
+{
+ return NAPI_GRO_CB(skb)->network_offsets[NAPI_GRO_CB(skb)->encap_mark];
+}
+
static inline void *skb_gro_network_header(const struct sk_buff *skb)
{
if (skb_gro_may_pull(skb, skb_gro_offset(skb)))
- return skb_gro_header_fast(skb, skb_network_offset(skb));
+ return skb_gro_header_fast(skb, skb_gro_network_offset(skb));
- return skb_network_header(skb);
+ return skb->data + skb_gro_network_offset(skb);
}
static inline __wsum inet_gro_compute_pseudo(const struct sk_buff *skb,
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index f00158234505..9404dd551dfd 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -478,6 +478,8 @@ static struct sk_buff *vlan_gro_receive(struct list_head *head,
if (unlikely(!vhdr))
goto out;
+ NAPI_GRO_CB(skb)->network_offsets[NAPI_GRO_CB(skb)->encap_mark] = hlen;
+
type = vhdr->h_vlan_encapsulated_proto;
ptype = gro_find_receive_by_type(type);
diff --git a/net/core/gro.c b/net/core/gro.c
index 83f35d99a682..c7901253a1a8 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -371,6 +371,7 @@ static inline void skb_gro_reset_offset(struct sk_buff *skb, u32 nhoff)
const skb_frag_t *frag0;
unsigned int headlen;
+ NAPI_GRO_CB(skb)->network_offset = 0;
NAPI_GRO_CB(skb)->data_offset = 0;
headlen = skb_headlen(skb);
NAPI_GRO_CB(skb)->frag0 = skb->data;
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 2edc8b796a4e..ea589e8cde2a 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -441,6 +441,7 @@ struct sk_buff *eth_gro_receive(struct list_head *head, struct sk_buff *skb)
skb_gro_pull(skb, sizeof(*eh));
skb_gro_postpull_rcsum(skb, eh, sizeof(*eh));
+ NAPI_GRO_CB(skb)->inner_network_offset = hlen;
pp = indirect_call_gro_receive_inet(ptype->callbacks.gro_receive,
ipv6_gro_receive, inet_gro_receive,
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 55bd72997b31..7899cbd5b263 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1568,10 +1568,6 @@ struct sk_buff *inet_gro_receive(struct list_head *head, struct sk_buff *skb)
NAPI_GRO_CB(skb)->is_atomic = !!(iph->frag_off & htons(IP_DF));
NAPI_GRO_CB(skb)->flush |= flush;
- skb_set_network_header(skb, off);
- /* The above will be needed by the transport layer if there is one
- * immediately following this IP hdr.
- */
/* Note : No need to call skb_gro_postpull_rcsum() here,
* as we already checked checksum over ipv4 header was 0
@@ -1597,6 +1593,7 @@ static struct sk_buff *ipip_gro_receive(struct list_head *head,
}
NAPI_GRO_CB(skb)->encap_mark = 1;
+ NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return inet_gro_receive(head, skb);
}
diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c
index 5028c72d494a..a1ff2bdf6206 100644
--- a/net/ipv4/gre_offload.c
+++ b/net/ipv4/gre_offload.c
@@ -224,6 +224,7 @@ static struct sk_buff *gre_gro_receive(struct list_head *head,
/* Adjusted NAPI_GRO_CB(skb)->csum after skb_gro_pull()*/
skb_gro_postpull_rcsum(skb, greh, grehlen);
+ NAPI_GRO_CB(skb)->inner_network_offset = hlen;
pp = call_gro_receive(ptype->callbacks.gro_receive, head, skb);
flush = 0;
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index b41e35af69ea..765797ca729c 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -67,7 +67,7 @@ static int ipv6_gro_pull_exthdrs(struct sk_buff *skb, int off, int proto)
off += len;
}
- skb_gro_pull(skb, off - skb_network_offset(skb));
+ skb_gro_pull(skb, off - skb_gro_network_offset(skb));
return proto;
}
@@ -236,8 +236,6 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
if (unlikely(!iph))
goto out;
- skb_set_network_header(skb, off);
-
flush += ntohs(iph->payload_len) != skb->len - hlen;
proto = iph->nexthdr;
@@ -259,7 +257,7 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
NAPI_GRO_CB(skb)->proto = proto;
flush--;
- nlen = skb_network_header_len(skb);
+ nlen = skb_gro_offset(skb) - off;
list_for_each_entry(p, head, list) {
const struct ipv6hdr *iph2;
@@ -327,6 +325,7 @@ static struct sk_buff *sit_ip6ip6_gro_receive(struct list_head *head,
}
NAPI_GRO_CB(skb)->encap_mark = 1;
+ NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return ipv6_gro_receive(head, skb);
}
@@ -342,6 +341,7 @@ static struct sk_buff *ip4ip6_gro_receive(struct list_head *head,
}
NAPI_GRO_CB(skb)->encap_mark = 1;
+ NAPI_GRO_CB(skb)->inner_network_offset = skb_gro_offset(skb);
return inet_gro_receive(head, skb);
}
--
2.36.1
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