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netfilter: flow_offload: Convert nft_flow_route() to dscp_t.

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Use ip4h_dscp()instead of reading ip_hdr()->tos directly.

ip4h_dscp() returns a dscp_t value which is temporarily converted back
to __u8 with inet_dscp_to_dsfield(). When converting ->flowi4_tos to
dscp_t in the future, we'll only have to remove that
inet_dscp_to_dsfield() call.

Also, remove the comment about the net/ip.h include file, since it's
now required for the ip4h_dscp() helper too.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Guillaume Nault 2024-11-14 17:03:31 +01:00 committed by Pablo Neira Ayuso
parent 0608746f95
commit 6f9615a6e6
1 changed files with 2 additions and 2 deletions
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4
net/netfilter/nft_flow_offload.c
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@ -8,7 +8,7 @@
#include <linux/spinlock.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_tables.h>
#include <net/ip.h> /* for ipv4 options. */
#include <net/ip.h>
#include <net/inet_dscp.h>
#include <net/netfilter/nf_tables.h>
#include <net/netfilter/nf_tables_core.h>
@ -236,7 +236,7 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
fl.u.ip4.saddr = ct->tuplehash[!dir].tuple.src.u3.ip;
fl.u.ip4.flowi4_oif = nft_in(pkt)->ifindex;
fl.u.ip4.flowi4_iif = this_dst->dev->ifindex;
fl.u.ip4.flowi4_tos = ip_hdr(pkt->skb)->tos & INET_DSCP_MASK;
fl.u.ip4.flowi4_tos = inet_dscp_to_dsfield(ip4h_dscp(ip_hdr(pkt->skb)));
fl.u.ip4.flowi4_mark = pkt->skb->mark;
fl.u.ip4.flowi4_flags = FLOWI_FLAG_ANYSRC;
break;