From 088a464ed53feeab9632c6748b9f25354639e2bd Mon Sep 17 00:00:00 2001 From: Dave Thaler Date: Tue, 30 Jan 2024 19:37:59 -0800 Subject: bpf, docs: Clarify which legacy packet instructions existed As discussed on the BPF IETF mailing list (see link), this patch updates the "Legacy BPF Packet access instructions" section to clarify which instructions are deprecated (vs which were never defined and so are not deprecated). Signed-off-by: Dave Thaler Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Acked-by: David Vernet Link: https://mailarchive.ietf.org/arch/msg/bpf/5LnnKm093cGpOmDI9TnLQLBXyys Link: https://lore.kernel.org/bpf/20240131033759.3634-1-dthaler1968@gmail.com --- Documentation/bpf/standardization/instruction-set.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/bpf/standardization/instruction-set.rst b/Documentation/bpf/standardization/instruction-set.rst index fceacca46299..dcbc9193c66f 100644 --- a/Documentation/bpf/standardization/instruction-set.rst +++ b/Documentation/bpf/standardization/instruction-set.rst @@ -630,7 +630,9 @@ Legacy BPF Packet access instructions ------------------------------------- BPF previously introduced special instructions for access to packet data that were -carried over from classic BPF. However, these instructions are +carried over from classic BPF. These instructions used an instruction +class of BPF_LD, a size modifier of BPF_W, BPF_H, or BPF_B, and a +mode modifier of BPF_ABS or BPF_IND. However, these instructions are deprecated and should no longer be used. All legacy packet access instructions belong to the "legacy" conformance group instead of the "basic" conformance group. -- cgit v1.2.3-58-ga151