diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-06-23 10:38:53 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-06-26 10:48:21 +0100 |
| commit | 91a41d7f972b1d78b4bcbb61ada4a33c9d7ba8a3 (patch) | |
| tree | 4754b9ac95168ec1b2bea02c15ee04345eaf67ee /arch | |
| parent | 6e86c59d4d0d04e7ebefd05b8af245c968892f81 (diff) | |
MIPS: bpf: Fix return values for VLAN_TAG_PRESENT case
If VLAN_TAG_PRESENT is not zero, then return 1 as expected by
classic BPF. Otherwise return 0.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7128/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/net/bpf_jit.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c index a4d1b76e7373..d852bb6d3fe3 100644 --- a/arch/mips/net/bpf_jit.c +++ b/arch/mips/net/bpf_jit.c @@ -1316,10 +1316,13 @@ jmp_cmp: vlan_tci) != 2); off = offsetof(struct sk_buff, vlan_tci); emit_half_load(r_s0, r_skb, off, ctx); - if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) + if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) { emit_andi(r_A, r_s0, (u16)~VLAN_TAG_PRESENT, ctx); - else + } else { emit_andi(r_A, r_s0, VLAN_TAG_PRESENT, ctx); + /* return 1 if present */ + emit_sltu(r_A, r_zero, r_A, ctx); + } break; case BPF_ANC | SKF_AD_PKTTYPE: ctx->flags |= SEEN_SKB; |