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| author | Denis Kirjanov <kda@linux-powerpc.org> | 2014-06-25 19:34:57 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-28 01:14:12 +0200 |
| commit | dba63115ce0c888fcb4cdec3f8a4ba97d144afaf (patch) | |
| tree | 6929f44335831f391ee1e2cb1ccad9ee5a12ebfc /arch | |
| parent | powerpc: bpf: Use correct mask while accessing the VLAN tag (diff) | |
| download | linux-dba63115ce0c888fcb4cdec3f8a4ba97d144afaf.tar.xz linux-dba63115ce0c888fcb4cdec3f8a4ba97d144afaf.zip | |
powerpc: bpf: Fix the broken LD_VLAN_TAG_PRESENT test
We have to return the boolean here if the tag presents
or not, not just ANDing the TCI with the mask which results to:
[ 709.412097] test_bpf: #18 LD_VLAN_TAG_PRESENT
[ 709.412245] ret 4096 != 1
[ 709.412332] ret 4096 != 1
[ 709.412333] FAIL (2 times)
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/net/bpf_jit_comp.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index 892167b0a4bc..82e82cadcde5 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -394,10 +394,12 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff, vlan_tci)); - if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) + if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) { PPC_ANDI(r_A, r_A, ~VLAN_TAG_PRESENT); - else + } else { PPC_ANDI(r_A, r_A, VLAN_TAG_PRESENT); + PPC_SRWI(r_A, r_A, 12); + } break; case BPF_ANC | SKF_AD_QUEUE: BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, |