[PATCH 4/6] ARM: net: add support for BPF_ANC | SKF_AD_PKTTYPE in ARM JIT.
flat view
STALE4114d
From: Nicolas Schichan <hidden>
Date: 2015-07-16 16:46:50
Also in:
linux-arm-kernel, lkml
Subsystem:
arm port, bpf jit for arm, bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Russell King, Puranjay Mohan, Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Signed-off-by: Nicolas Schichan <redacted> --- arch/arm/net/bpf_jit_32.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index c011e22..6ff248c 100644
--- a/arch/arm/net/bpf_jit_32.c
+++ b/arch/arm/net/bpf_jit_32.c@@ -895,6 +895,17 @@ b_epilogue: OP_IMM3(ARM_AND, r_A, r_A, 0x1, ctx); } break; + case BPF_ANC | SKF_AD_PKTTYPE: + ctx->seen |= SEEN_SKB; + BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, + __pkt_type_offset[0]) != 1); + off = PKT_TYPE_OFFSET(); + emit(ARM_LDRB_I(r_A, r_skb, off), ctx); + emit(ARM_AND_I(r_A, r_A, PKT_TYPE_MAX), ctx); +#ifdef __BIG_ENDIAN_BITFIELD + emit(ARM_LSR_I(r_A, r_A, 5), ctx); +#endif + break; case BPF_ANC | SKF_AD_QUEUE: ctx->seen |= SEEN_SKB; BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff,
--
1.9.1