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bpf: lwtunnel: Unmask upper DSCP bits in bpf_lwt_xmit_reroute()

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Unmask the upper DSCP bits when calling ip_route_output_key() so that in
the future it could perform the FIB lookup according to the full DSCP
value.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2024-09-05 19:51:31 +03:00 committed by David S. Miller
parent 25376a8901
commit b3899830aa
1 changed files with 2 additions and 1 deletions
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3
net/core/lwt_bpf.c
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@ -12,6 +12,7 @@
#include <net/gre.h>
#include <net/ip6_route.h>
#include <net/ipv6_stubs.h>
#include <net/inet_dscp.h>
struct bpf_lwt_prog {
struct bpf_prog *prog;
@ -205,7 +206,7 @@ static int bpf_lwt_xmit_reroute(struct sk_buff *skb)
fl4.flowi4_oif = oif;
fl4.flowi4_mark = skb->mark;
fl4.flowi4_uid = sock_net_uid(net, sk);
fl4.flowi4_tos = RT_TOS(iph->tos);
fl4.flowi4_tos = iph->tos & INET_DSCP_MASK;
fl4.flowi4_flags = FLOWI_FLAG_ANYSRC;
fl4.flowi4_proto = iph->protocol;
fl4.daddr = iph->daddr;