diff options
Diffstat (limited to 'lib/test_bpf.c')
| -rw-r--r-- | lib/test_bpf.c | 106 |
1 files changed, 103 insertions, 3 deletions
diff --git a/lib/test_bpf.c b/lib/test_bpf.c index 7f58c735d745..3afddf2026c9 100644 --- a/lib/test_bpf.c +++ b/lib/test_bpf.c @@ -18,6 +18,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/filter.h> +#include <linux/bpf.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/if_vlan.h> @@ -355,6 +356,81 @@ static int bpf_fill_ja(struct bpf_test *self) return __bpf_fill_ja(self, 12, 9); } +static int bpf_fill_ld_abs_get_processor_id(struct bpf_test *self) +{ + unsigned int len = BPF_MAXINSNS; + struct sock_filter *insn; + int i; + + insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL); + if (!insn) + return -ENOMEM; + + for (i = 0; i < len - 1; i += 2) { + insn[i] = __BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 0); + insn[i + 1] = __BPF_STMT(BPF_LD | BPF_W | BPF_ABS, + SKF_AD_OFF + SKF_AD_CPU); + } + + insn[len - 1] = __BPF_STMT(BPF_RET | BPF_K, 0xbee); + + self->u.ptr.insns = insn; + self->u.ptr.len = len; + + return 0; +} + +#define PUSH_CNT 68 +/* test: {skb->data[0], vlan_push} x 68 + {skb->data[0], vlan_pop} x 68 */ +static int bpf_fill_ld_abs_vlan_push_pop(struct bpf_test *self) +{ + unsigned int len = BPF_MAXINSNS; + struct bpf_insn *insn; + int i = 0, j, k = 0; + + insn = kmalloc_array(len, sizeof(*insn), GFP_KERNEL); + if (!insn) + return -ENOMEM; + + insn[i++] = BPF_MOV64_REG(R6, R1); +loop: + for (j = 0; j < PUSH_CNT; j++) { + insn[i++] = BPF_LD_ABS(BPF_B, 0); + insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0x34, len - i - 2); + i++; + insn[i++] = BPF_MOV64_REG(R1, R6); + insn[i++] = BPF_MOV64_IMM(R2, 1); + insn[i++] = BPF_MOV64_IMM(R3, 2); + insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + bpf_skb_vlan_push_proto.func - __bpf_call_base); + insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0, len - i - 2); + i++; + } + + for (j = 0; j < PUSH_CNT; j++) { + insn[i++] = BPF_LD_ABS(BPF_B, 0); + insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0x34, len - i - 2); + i++; + insn[i++] = BPF_MOV64_REG(R1, R6); + insn[i++] = BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, + bpf_skb_vlan_pop_proto.func - __bpf_call_base); + insn[i] = BPF_JMP_IMM(BPF_JNE, R0, 0, len - i - 2); + i++; + } + if (++k < 5) + goto loop; + + for (; i < len - 1; i++) + insn[i] = BPF_ALU32_IMM(BPF_MOV, R0, 0xbef); + + insn[len - 1] = BPF_EXIT_INSN(); + + self->u.ptr.insns = insn; + self->u.ptr.len = len; + + return 0; +} + static struct bpf_test tests[] = { { "TAX", @@ -3674,6 +3750,9 @@ static struct bpf_test tests[] = { .u.insns_int = { BPF_LD_IMM64(R0, 0x0123456789abcdefLL), BPF_ENDIAN(BPF_FROM_BE, R0, 32), + BPF_ALU64_REG(BPF_MOV, R1, R0), + BPF_ALU64_IMM(BPF_RSH, R1, 32), + BPF_ALU32_REG(BPF_ADD, R0, R1), /* R1 = 0 */ BPF_EXIT_INSN(), }, INTERNAL, @@ -3708,6 +3787,9 @@ static struct bpf_test tests[] = { .u.insns_int = { BPF_LD_IMM64(R0, 0x0123456789abcdefLL), BPF_ENDIAN(BPF_FROM_LE, R0, 32), + BPF_ALU64_REG(BPF_MOV, R1, R0), + BPF_ALU64_IMM(BPF_RSH, R1, 32), + BPF_ALU32_REG(BPF_ADD, R0, R1), /* R1 = 0 */ BPF_EXIT_INSN(), }, INTERNAL, @@ -4392,6 +4474,22 @@ static struct bpf_test tests[] = { { { 0, 0xababcbac } }, .fill_helper = bpf_fill_maxinsns11, }, + { + "BPF_MAXINSNS: ld_abs+get_processor_id", + { }, + CLASSIC, + { }, + { { 1, 0xbee } }, + .fill_helper = bpf_fill_ld_abs_get_processor_id, + }, + { + "BPF_MAXINSNS: ld_abs+vlan_push/pop", + { }, + INTERNAL, + { 0x34 }, + { { 1, 0xbef } }, + .fill_helper = bpf_fill_ld_abs_vlan_push_pop, + }, }; static struct net_device dev; @@ -4515,6 +4613,8 @@ static struct bpf_prog *generate_filter(int which, int *err) } fp->len = flen; + /* Type doesn't really matter here as long as it's not unspec. */ + fp->type = BPF_PROG_TYPE_SOCKET_FILTER; memcpy(fp->insnsi, fptr, fp->len * sizeof(struct bpf_insn)); bpf_prog_select_runtime(fp); @@ -4545,14 +4645,14 @@ static int __run_one(const struct bpf_prog *fp, const void *data, u64 start, finish; int ret = 0, i; - start = ktime_to_us(ktime_get()); + start = ktime_get_ns(); for (i = 0; i < runs; i++) ret = BPF_PROG_RUN(fp, data); - finish = ktime_to_us(ktime_get()); + finish = ktime_get_ns(); - *duration = (finish - start) * 1000ULL; + *duration = finish - start; do_div(*duration, runs); return ret; |