Add BPF extension SKF_AD_HATYPE to ppc JIT to check
the hw type of the interface
JIT off:
[ 69.106783] test_bpf: #20 LD_HATYPE 48 48 PASS
JIT on:
[ 64.721757] test_bpf: #20 LD_HATYPE 7 6 PASS
CC: Alexei Starovoitov<alexei.starovoi...@gmail.com>
CC: Daniel Borkmann<dbork...@redhat.com>
CC: Philippe Bergheaud<fe...@linux.vnet.ibm.com>
Signed-off-by: Denis Kirjanov <k...@linux-powerpc.org>
---
arch/powerpc/net/bpf_jit_comp.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index d110e28..8bf4fc2 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -412,6 +412,22 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32
*image,
PPC_ANDI(r_A, r_A, PKT_TYPE_MAX);
PPC_SRWI(r_A, r_A, 5);
break;
+ case BPF_ANC | SKF_AD_HATYPE:
+ BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, type) !=
2);
+ PPC_LD_OFFS(r_scratch1, r_skb, offsetof(struct sk_buff,
+ dev));
+ PPC_CMPDI(r_scratch1, 0);
+ if (ctx->pc_ret0 != -1) {
+ PPC_BCC(COND_EQ, addrs[ctx->pc_ret0]);
+ } else {
+ /* Exit, returning 0; first pass hits here. */
+ PPC_BCC_SHORT(COND_NE, (ctx->idx*4)+12);
+ PPC_LI(r_ret, 0);
+ PPC_JMP(exit_addr);
+ }
+ PPC_LHZ_OFFS(r_A, r_scratch1,
+ offsetof(struct net_device, type));
+ break;
case BPF_ANC | SKF_AD_CPU:
#ifdef CONFIG_SMP
/*
--
2.1.0
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