From: Nicolas Schichan <nschichan@freebox.fr>
Date: Mon, 27 Jul 2015 13:06:49 +0000 (+0200)
Subject: ARM: net: add support for BPF_ANC | SKF_AD_PKTTYPE in ARM JIT.
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1447f93f22add339ee63d1a7015309d9fbfa47e8;p=openwrt%2Fstaging%2Fblogic.git

ARM: net: add support for BPF_ANC | SKF_AD_PKTTYPE in ARM JIT.

Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c
index c011e2296cb1..6ff248ca36d9 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,