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| author | Denis Kirjanov <kda@linux-powerpc.org> | 2014-06-25 21:34:56 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-27 16:14:12 -0700 |
| commit | 3fc60aa097b8eb0f701c5bf755bc8f7d3ffeb0bd (patch) | |
| tree | cf48802982784b6b60c31aaea3965438bed8bbd8 /arch | |
| parent | e940f5d6ba6a01f8dbb870854d5205d322452730 (diff) | |
| download | linux-3fc60aa097b8eb0f701c5bf755bc8f7d3ffeb0bd.tar.gz linux-3fc60aa097b8eb0f701c5bf755bc8f7d3ffeb0bd.tar.bz2 linux-3fc60aa097b8eb0f701c5bf755bc8f7d3ffeb0bd.zip | |
powerpc: bpf: Use correct mask while accessing the VLAN tag
To get a full tag (and not just a VID) we should access the TCI
except the VLAN_TAG_PRESENT field (which means that 802.1q header
is present). Also ensure that the VLAN_TAG_PRESENT stay on its place
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 | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c index 6dcdadefd8d0..892167b0a4bc 100644 --- a/arch/powerpc/net/bpf_jit_comp.c +++ b/arch/powerpc/net/bpf_jit_comp.c @@ -390,10 +390,12 @@ static int bpf_jit_build_body(struct sk_filter *fp, u32 *image, case BPF_ANC | SKF_AD_VLAN_TAG: case BPF_ANC | SKF_AD_VLAN_TAG_PRESENT: BUILD_BUG_ON(FIELD_SIZEOF(struct sk_buff, vlan_tci) != 2); + BUILD_BUG_ON(VLAN_TAG_PRESENT != 0x1000); + PPC_LHZ_OFFS(r_A, r_skb, offsetof(struct sk_buff, vlan_tci)); if (code == (BPF_ANC | SKF_AD_VLAN_TAG)) - PPC_ANDI(r_A, r_A, VLAN_VID_MASK); + PPC_ANDI(r_A, r_A, ~VLAN_TAG_PRESENT); else PPC_ANDI(r_A, r_A, VLAN_TAG_PRESENT); break; |