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Message-Id: <20200428114028.20693-3-fw@strlen.de>
Date: Tue, 28 Apr 2020 13:40:23 +0200
From: Florian Westphal <fw@...len.de>
To: <netdev@...r.kernel.org>
Cc: Florian Westphal <fw@...len.de>
Subject: [PATCH ipsec-next 2/7] xfrm: state: remove extract_input indirection from xfrm_state_afinfo
In order to keep CONFIG_IPV6=m working, xfrm6_extract_header needs to be
duplicated. It will be removed again in a followup change when the
remaining caller is moved to net/xfrm as well.
Signed-off-by: Florian Westphal <fw@...len.de>
---
include/net/xfrm.h | 3 ---
net/ipv4/xfrm4_input.c | 5 -----
net/ipv4/xfrm4_state.c | 1 -
net/ipv6/xfrm6_input.c | 5 -----
net/ipv6/xfrm6_output.c | 17 ++++++++++++++++-
net/ipv6/xfrm6_state.c | 24 ------------------------
net/xfrm/xfrm_inout.h | 18 ++++++++++++++++++
net/xfrm/xfrm_input.c | 21 +++++++++++----------
8 files changed, 45 insertions(+), 49 deletions(-)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 79c30938d76e..b0f0097a616e 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -362,8 +362,6 @@ struct xfrm_state_afinfo {
int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
int (*output_finish)(struct sock *sk, struct sk_buff *skb);
- int (*extract_input)(struct xfrm_state *x,
- struct sk_buff *skb);
int (*extract_output)(struct xfrm_state *x,
struct sk_buff *skb);
int (*transport_finish)(struct sk_buff *skb,
@@ -1585,7 +1583,6 @@ int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char prot
int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
-int xfrm6_extract_header(struct sk_buff *skb);
int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
struct ip6_tnl *t);
diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index f8de2482a529..ad2afeef4f10 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -18,11 +18,6 @@
#include <net/ip.h>
#include <net/xfrm.h>
-int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb)
-{
- return xfrm4_extract_header(skb);
-}
-
static int xfrm4_rcv_encap_finish2(struct net *net, struct sock *sk,
struct sk_buff *skb)
{
diff --git a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
index d7c200779e4f..521fc1bc069c 100644
--- a/net/ipv4/xfrm4_state.c
+++ b/net/ipv4/xfrm4_state.c
@@ -36,7 +36,6 @@ static struct xfrm_state_afinfo xfrm4_state_afinfo = {
.proto = IPPROTO_IPIP,
.output = xfrm4_output,
.output_finish = xfrm4_output_finish,
- .extract_input = xfrm4_extract_input,
.transport_finish = xfrm4_transport_finish,
.local_error = xfrm4_local_error,
};
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index a52cb3fc6df5..4c2919954f7b 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -17,11 +17,6 @@
#include <net/ipv6.h>
#include <net/xfrm.h>
-int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb)
-{
- return xfrm6_extract_header(skb);
-}
-
int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
struct ip6_tnl *t)
{
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index fbe51d40bd7e..855078a43fc7 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -94,6 +94,20 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
return ret;
}
+static void __xfrm6_extract_header(struct sk_buff *skb)
+{
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+
+ XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
+ XFRM_MODE_SKB_CB(skb)->id = 0;
+ XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
+ XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
+ XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
+ XFRM_MODE_SKB_CB(skb)->optlen = 0;
+ memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
+ sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
+}
+
int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
{
int err;
@@ -104,7 +118,8 @@ int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb)
XFRM_MODE_SKB_CB(skb)->protocol = ipv6_hdr(skb)->nexthdr;
- return xfrm6_extract_header(skb);
+ __xfrm6_extract_header(skb);
+ return 0;
}
int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb)
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index 78daadecbdef..8fbf5a68ee6e 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -13,36 +13,12 @@
*/
#include <net/xfrm.h>
-#include <linux/pfkeyv2.h>
-#include <linux/ipsec.h>
-#include <linux/netfilter_ipv6.h>
-#include <linux/export.h>
-#include <net/dsfield.h>
-#include <net/ipv6.h>
-#include <net/addrconf.h>
-
-int xfrm6_extract_header(struct sk_buff *skb)
-{
- struct ipv6hdr *iph = ipv6_hdr(skb);
-
- XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
- XFRM_MODE_SKB_CB(skb)->id = 0;
- XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
- XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
- XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
- XFRM_MODE_SKB_CB(skb)->optlen = 0;
- memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
- sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
-
- return 0;
-}
static struct xfrm_state_afinfo xfrm6_state_afinfo = {
.family = AF_INET6,
.proto = IPPROTO_IPV6,
.output = xfrm6_output,
.output_finish = xfrm6_output_finish,
- .extract_input = xfrm6_extract_input,
.extract_output = xfrm6_extract_output,
.transport_finish = xfrm6_transport_finish,
.local_error = xfrm6_local_error,
diff --git a/net/xfrm/xfrm_inout.h b/net/xfrm/xfrm_inout.h
index c7b0318938e2..e24abac92dc2 100644
--- a/net/xfrm/xfrm_inout.h
+++ b/net/xfrm/xfrm_inout.h
@@ -6,6 +6,24 @@
#ifndef XFRM_INOUT_H
#define XFRM_INOUT_H 1
+static inline void xfrm6_extract_header(struct sk_buff *skb)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ struct ipv6hdr *iph = ipv6_hdr(skb);
+
+ XFRM_MODE_SKB_CB(skb)->ihl = sizeof(*iph);
+ XFRM_MODE_SKB_CB(skb)->id = 0;
+ XFRM_MODE_SKB_CB(skb)->frag_off = htons(IP_DF);
+ XFRM_MODE_SKB_CB(skb)->tos = ipv6_get_dsfield(iph);
+ XFRM_MODE_SKB_CB(skb)->ttl = iph->hop_limit;
+ XFRM_MODE_SKB_CB(skb)->optlen = 0;
+ memcpy(XFRM_MODE_SKB_CB(skb)->flow_lbl, iph->flow_lbl,
+ sizeof(XFRM_MODE_SKB_CB(skb)->flow_lbl));
+#else
+ WARN_ON_ONCE(1);
+#endif
+}
+
static inline void xfrm6_beet_make_header(struct sk_buff *skb)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index aa35f23c4912..6db266a0cb2d 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -353,17 +353,18 @@ xfrm_inner_mode_encap_remove(struct xfrm_state *x,
static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
{
const struct xfrm_mode *inner_mode = &x->inner_mode;
- const struct xfrm_state_afinfo *afinfo;
- int err = -EAFNOSUPPORT;
-
- rcu_read_lock();
- afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family);
- if (likely(afinfo))
- err = afinfo->extract_input(x, skb);
- rcu_read_unlock();
- if (err)
- return err;
+ switch (x->outer_mode.family) {
+ case AF_INET:
+ xfrm4_extract_header(skb);
+ break;
+ case AF_INET6:
+ xfrm6_extract_header(skb);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return -EAFNOSUPPORT;
+ }
if (x->sel.family == AF_UNSPEC) {
inner_mode = xfrm_ip2inner_mode(x, XFRM_MODE_SKB_CB(skb)->protocol);
--
2.26.2
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