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sparc: bpf_jit_comp: add VLAN instructions for BPF JIT

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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>
This commit is contained in:
Daniel Borkmann 2012-11-04 16:59:30 +00:00 committed by David S. Miller
parent d64ec84151
commit 54e7e2df3e
1 changed files with 19 additions and 0 deletions
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19
arch/sparc/net/bpf_jit_comp.c
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@ -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);