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| author | Daniel Borkmann <dxchgb@gmail.com> | 2012-11-04 16:59:30 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-06 17:41:42 -0500 |
| commit | 54e7e2df3e2f854ae33015cec25da5190e6a18ac (patch) | |
| tree | dafceaff8dcf0d77d783cf5584ebe7fad12acaaa /arch/sparc/net | |
| parent | d64ec841517a25f6d468bde9f67e5b4cffdc67c7 (diff) | |
| download | op-kernel-dev-54e7e2df3e2f854ae33015cec25da5190e6a18ac.zip op-kernel-dev-54e7e2df3e2f854ae33015cec25da5190e6a18ac.tar.gz | |
sparc: bpf_jit_comp: add VLAN instructions for BPF JIT
This patch is a follow-up for patch "net: filter: add vlan tag access"
to support the new VLAN_TAG/VLAN_TAG_PRESENT accessors in BPF JIT.
Signed-off-by: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/net')
| -rw-r--r-- | arch/sparc/net/bpf_jit_comp.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/sparc/net/bpf_jit_comp.c b/arch/sparc/net/bpf_jit_comp.c index 2836870..3109ca6 100644 --- a/arch/sparc/net/bpf_jit_comp.c +++ b/arch/sparc/net/bpf_jit_comp.c @@ -3,6 +3,7 @@ #include <linux/netdevice.h> #include <linux/filter.h> #include <linux/cache.h> +#include <linux/if_vlan.h> #include <asm/cacheflush.h> #include <asm/ptrace.h> @@ -312,6 +313,12 @@ do { *prog++ = BR_OPC | WDISP22(OFF); \ #define emit_addi(R1, IMM, R3) \ *prog++ = (ADD | IMMED | RS1(R1) | S13(IMM) | RD(R3)) +#define emit_and(R1, R2, R3) \ + *prog++ = (AND | RS1(R1) | RS2(R2) | RD(R3)) + +#define emit_andi(R1, IMM, R3) \ + *prog++ = (AND | IMMED | RS1(R1) | S13(IMM) | RD(R3)) + #define emit_alloc_stack(SZ) \ *prog++ = (SUB | IMMED | RS1(SP) | S13(SZ) | RD(SP)) @@ -415,6 +422,8 @@ void bpf_jit_compile(struct sk_filter *fp) case BPF_S_ANC_IFINDEX: case BPF_S_ANC_MARK: case BPF_S_ANC_RXHASH: + case BPF_S_ANC_VLAN_TAG: + case BPF_S_ANC_VLAN_TAG_PRESENT: case BPF_S_ANC_CPU: case BPF_S_ANC_QUEUE: case BPF_S_LD_W_ABS: @@ -600,6 +609,16 @@ void bpf_jit_compile(struct sk_filter *fp) case BPF_S_ANC_RXHASH: emit_skb_load32(rxhash, r_A); break; + case BPF_S_ANC_VLAN_TAG: + case BPF_S_ANC_VLAN_TAG_PRESENT: + emit_skb_load16(vlan_tci, r_A); + if (filter[i].code == BPF_S_ANC_VLAN_TAG) { + emit_andi(r_A, VLAN_VID_MASK, r_A); + } else { + emit_loadimm(VLAN_TAG_PRESENT, r_TMP); + emit_and(r_A, r_TMP, r_A); + } + break; case BPF_S_LD_IMM: emit_loadimm(K, r_A); |
