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Code Issues Releases Wiki Activity

xfrm: move mark and oif flowi decode into common code 

flowi4_oif/flowi6_oif and mark are aliased to flowi_common field, i.e.
all can be used interchangeably.

Instead of duplicating place this in common code.
No functional changes intended.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
This commit is contained in:
Florian Westphal 2023-10-04 18:09:52 +02:00 committed by Steffen Klassert
parent 2b1dc6285c
commit 45f87dd6b3
1 changed files with 12 additions and 12 deletions
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24
net/xfrm/xfrm_policy.c
View File

@ -3373,14 +3373,8 @@ decode_session4(struct sk_buff *skb, struct flowi *fl, bool reverse)
int ihl = iph->ihl;
u8 *xprth = skb_network_header(skb) + ihl * 4;
struct flowi4 *fl4 = &fl->u.ip4;
int oif = 0;
if (skb_dst(skb) && skb_dst(skb)->dev)
oif = skb_dst(skb)->dev->ifindex;
memset(fl4, 0, sizeof(struct flowi4));
fl4->flowi4_mark = skb->mark;
fl4->flowi4_oif = reverse ? skb->skb_iif : oif;
fl4->flowi4_proto = iph->protocol;
fl4->daddr = reverse ? iph->saddr : iph->daddr;
@ -3451,7 +3445,6 @@ decode_session6(struct sk_buff *skb, struct flowi *fl, bool reverse)
struct ipv6_opt_hdr *exthdr;
const unsigned char *nh = skb_network_header(skb);
u16 nhoff = IP6CB(skb)->nhoff;
int oif = 0;
u8 nexthdr;
if (!nhoff)
@ -3459,12 +3452,7 @@ decode_session6(struct sk_buff *skb, struct flowi *fl, bool reverse)
nexthdr = nh[nhoff];
if (skb_dst(skb) && skb_dst(skb)->dev)
oif = skb_dst(skb)->dev->ifindex;
memset(fl6, 0, sizeof(struct flowi6));
fl6->flowi6_mark = skb->mark;
fl6->flowi6_oif = reverse ? skb->skb_iif : oif;
fl6->daddr = reverse ? hdr->saddr : hdr->daddr;
fl6->saddr = reverse ? hdr->daddr : hdr->saddr;
@ -3570,6 +3558,18 @@ int __xfrm_decode_session(struct net *net, struct sk_buff *skb, struct flowi *fl
return -EAFNOSUPPORT;
}
fl->flowi_mark = skb->mark;
if (reverse) {
fl->flowi_oif = skb->skb_iif;
} else {
int oif = 0;
if (skb_dst(skb) && skb_dst(skb)->dev)
oif = skb_dst(skb)->dev->ifindex;
fl->flowi_oif = oif;
}
return security_xfrm_decode_session(skb, &fl->flowi_secid);
}
EXPORT_SYMBOL(__xfrm_decode_session);