diff options
| author | Guillaume Nault <gnault@redhat.com> | 2024-10-01 21:28:49 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-10-03 16:21:21 -0700 |
| commit | 66fb6386d358a04edd5c640e38b4a02b323b89d8 (patch) | |
| tree | 49890d52d1f0eb6430fe6d5c7ae20fd7405d04be /net/ipv4/ip_fragment.c | |
| parent | 7e863e5db6185b1add0df4cb01b31a4ed1c4b738 (diff) | |
ipv4: Convert ip_route_input_noref() to dscp_t.
Pass a dscp_t variable to ip_route_input_noref(), instead of a plain
u8, to prevent accidental setting of ECN bits in ->flowi4_tos.
Callers of ip_route_input_noref() to consider are:
* arp_process() in net/ipv4/arp.c. This function sets the tos
parameter to 0, which is already a valid dscp_t value, so it
doesn't need to be adjusted for the new prototype.
* ip_route_input(), which already has a dscp_t variable to pass as
parameter. We just need to remove the inet_dscp_to_dsfield()
conversion.
* ipvlan_l3_rcv(), bpf_lwt_input_reroute(), ip_expire(),
ip_rcv_finish_core(), xfrm4_rcv_encap_finish() and
xfrm4_rcv_encap(), which get the DSCP directly from IPv4 headers
and can simply use the ip4h_dscp() helper.
While there, declare the IPv4 header pointers as const in
ipvlan_l3_rcv() and bpf_lwt_input_reroute().
Also, modify the declaration of ip_route_input_noref() in
include/net/route.h so that it matches the prototype of its
implementation in net/ipv4/route.c.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/a8a747bed452519c4d0cc06af32c7e7795d7b627.1727807926.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/ip_fragment.c')
| -rw-r--r-- | net/ipv4/ip_fragment.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index a92664a5ef2e..48e2810f1f27 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -175,8 +175,8 @@ static void ip_expire(struct timer_list *t) /* skb has no dst, perform route lookup again */ iph = ip_hdr(head); - err = ip_route_input_noref(head, iph->daddr, iph->saddr, - iph->tos, head->dev); + err = ip_route_input_noref(head, iph->daddr, iph->saddr, ip4h_dscp(iph), + head->dev); if (err) goto out; |