diff options
| author | Denis Kirjanov <kda@linux-powerpc.org> | 2014-11-10 08:59:43 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-11 13:39:47 -0500 |
| commit | 5b61c4db49e2530ed10631321d4c73f49d560a93 (patch) | |
| tree | 1dbc2c4c557a54aa81a161f65b8bffb61ed5bfd6 /arch/powerpc/net/bpf_jit_comp.c | |
| parent | 4083c8056deebc01e658d6a2ba060cca4e733fb8 (diff) | |
PPC: bpf_jit_comp: add SKF_AD_HATYPE instruction
Add BPF extension SKF_AD_HATYPE to ppc JIT to check
the hw type of the interface
Before:
[ 57.723666] test_bpf: #20 LD_HATYPE
[ 57.723675] BPF filter opcode 0020 (@0) unsupported
[ 57.724168] 48 48 PASS
After:
[ 103.053184] test_bpf: #20 LD_HATYPE 7 6 PASS
CC: Alexei Starovoitov<alexei.starovoitov@gmail.com>
CC: Daniel Borkmann<dborkman@redhat.com>
CC: Philippe Bergheaud<felix@linux.vnet.ibm.com>
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
v2: address Alexei's comments
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/powerpc/net/bpf_jit_comp.c')
| -rw-r--r-- | arch/powerpc/net/bpf_jit_comp.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index d110e288d7ac..d3fa80d04e6b 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -361,6 +361,11 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, protocol)); break; case BPF_ANC | SKF_AD_IFINDEX: + case BPF_ANC | SKF_AD_HATYPE: + BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, + ifindex) != 4); + 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); @@ -368,14 +373,18 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image, 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_BCC_SHORT(COND_NE, ctx->idx * 4 + 12); PPC_LI(r_ret, 0); PPC_JMP(exit_addr); } - BUILD_BUG_ON(FIELD_SIZEOF(struct net_device, - ifindex) != 4); - PPC_LWZ_OFFS(r_A, r_scratch1, + if (code == (BPF_ANC | SKF_AD_IFINDEX)) { + PPC_LWZ_OFFS(r_A, r_scratch1, offsetof(struct net_device, ifindex)); + } else { + PPC_LHZ_OFFS(r_A, r_scratch1, + offsetof(struct net_device, type)); + } + break; case BPF_ANC | SKF_AD_MARK: BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, mark) != 4); |