diff options
| author | Paul Chaignon <paul.chaignon@gmail.com> | 2025-05-05 21:58:39 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-05-07 18:16:33 -0700 |
| commit | f5c79ffdc250bc8c90fd4fdf1e5d7ac4647912d5 (patch) | |
| tree | 18c695e7afdd4dfb8a02f21704e6c1734398d644 /tools | |
| parent | c4327229948879814229b46aa26a750718888503 (diff) | |
bpf: Clarify handling of mark and tstamp by redirect_peer
When switching network namespaces with the bpf_redirect_peer helper, the
skb->mark and skb->tstamp fields are not zeroed out like they can be on
a typical netns switch. This patch clarifies that in the helper
description.
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/ccc86af26d43c5c0b776bcba2601b7479c0d46d0.1746460653.git.paul.chaignon@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 28705ae67784..fd404729b115 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -4968,6 +4968,9 @@ union bpf_attr { * the netns switch takes place from ingress to ingress without * going through the CPU's backlog queue. * + * *skb*\ **->mark** and *skb*\ **->tstamp** are not cleared during + * the netns switch. + * * The *flags* argument is reserved and must be 0. The helper is * currently only supported for tc BPF program types at the * ingress hook and for veth and netkit target device types. The |