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

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Signed-off-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Schichan 2015-07-27 15:06:49 +02:00 committed by David S. Miller
parent e11f40b935
commit 1447f93f22
1 changed files with 11 additions and 0 deletions
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11
arch/arm/net/bpf_jit_32.c
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@ -895,6 +895,17 @@ static int build_body(struct jit_ctx *ctx)
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,