mirror of https://gitee.com/openkylin/linux.git
502 lines
13 KiB
C
502 lines
13 KiB
C
/* Copyright (c) 2017 Facebook
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <linux/types.h>
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typedef __u16 __sum16;
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#include <arpa/inet.h>
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#include <linux/if_ether.h>
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#include <linux/if_packet.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/tcp.h>
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#include <sys/wait.h>
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <linux/bpf.h>
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#include <linux/err.h>
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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#include "test_iptunnel_common.h"
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#include "bpf_util.h"
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#include "bpf_endian.h"
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static int error_cnt, pass_cnt;
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#define MAGIC_BYTES 123
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/* ipv4 test vector */
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static struct {
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struct ethhdr eth;
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struct iphdr iph;
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struct tcphdr tcp;
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} __packed pkt_v4 = {
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.eth.h_proto = bpf_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = 6,
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.iph.tot_len = bpf_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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};
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/* ipv6 test vector */
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static struct {
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struct ethhdr eth;
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struct ipv6hdr iph;
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struct tcphdr tcp;
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} __packed pkt_v6 = {
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.eth.h_proto = bpf_htons(ETH_P_IPV6),
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.iph.nexthdr = 6,
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.iph.payload_len = bpf_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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};
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#define CHECK(condition, tag, format...) ({ \
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int __ret = !!(condition); \
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if (__ret) { \
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error_cnt++; \
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printf("%s:FAIL:%s ", __func__, tag); \
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printf(format); \
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} else { \
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pass_cnt++; \
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printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
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} \
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__ret; \
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})
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static int bpf_prog_load(const char *file, enum bpf_prog_type type,
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struct bpf_object **pobj, int *prog_fd)
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{
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struct bpf_program *prog;
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struct bpf_object *obj;
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int err;
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obj = bpf_object__open(file);
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if (IS_ERR(obj)) {
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error_cnt++;
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return -ENOENT;
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}
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prog = bpf_program__next(NULL, obj);
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if (!prog) {
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bpf_object__close(obj);
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error_cnt++;
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return -ENOENT;
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}
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bpf_program__set_type(prog, type);
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err = bpf_object__load(obj);
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if (err) {
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bpf_object__close(obj);
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error_cnt++;
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return -EINVAL;
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}
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*pobj = obj;
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*prog_fd = bpf_program__fd(prog);
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return 0;
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}
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static int bpf_find_map(const char *test, struct bpf_object *obj,
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const char *name)
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{
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struct bpf_map *map;
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map = bpf_object__find_map_by_name(obj, name);
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if (!map) {
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printf("%s:FAIL:map '%s' not found\n", test, name);
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error_cnt++;
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return -1;
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}
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return bpf_map__fd(map);
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}
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static void test_pkt_access(void)
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{
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const char *file = "./test_pkt_access.o";
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struct bpf_object *obj;
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__u32 duration, retval;
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int err, prog_fd;
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err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
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if (err)
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return;
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err = bpf_prog_test_run(prog_fd, 100000, &pkt_v4, sizeof(pkt_v4),
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NULL, NULL, &retval, &duration);
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CHECK(err || errno || retval, "ipv4",
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"err %d errno %d retval %d duration %d\n",
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err, errno, retval, duration);
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err = bpf_prog_test_run(prog_fd, 100000, &pkt_v6, sizeof(pkt_v6),
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NULL, NULL, &retval, &duration);
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CHECK(err || errno || retval, "ipv6",
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"err %d errno %d retval %d duration %d\n",
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err, errno, retval, duration);
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bpf_object__close(obj);
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}
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static void test_xdp(void)
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{
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struct vip key4 = {.protocol = 6, .family = AF_INET};
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struct vip key6 = {.protocol = 6, .family = AF_INET6};
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struct iptnl_info value4 = {.family = AF_INET};
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struct iptnl_info value6 = {.family = AF_INET6};
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const char *file = "./test_xdp.o";
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struct bpf_object *obj;
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char buf[128];
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struct ipv6hdr *iph6 = (void *)buf + sizeof(struct ethhdr);
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struct iphdr *iph = (void *)buf + sizeof(struct ethhdr);
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__u32 duration, retval, size;
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int err, prog_fd, map_fd;
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err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
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if (err)
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return;
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map_fd = bpf_find_map(__func__, obj, "vip2tnl");
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if (map_fd < 0)
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goto out;
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bpf_map_update_elem(map_fd, &key4, &value4, 0);
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bpf_map_update_elem(map_fd, &key6, &value6, 0);
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err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4),
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buf, &size, &retval, &duration);
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CHECK(err || errno || retval != XDP_TX || size != 74 ||
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iph->protocol != IPPROTO_IPIP, "ipv4",
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"err %d errno %d retval %d size %d\n",
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err, errno, retval, size);
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err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6),
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buf, &size, &retval, &duration);
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CHECK(err || errno || retval != XDP_TX || size != 114 ||
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iph6->nexthdr != IPPROTO_IPV6, "ipv6",
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"err %d errno %d retval %d size %d\n",
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err, errno, retval, size);
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out:
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bpf_object__close(obj);
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}
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#define MAGIC_VAL 0x1234
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#define NUM_ITER 100000
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#define VIP_NUM 5
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static void test_l4lb(void)
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{
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unsigned int nr_cpus = bpf_num_possible_cpus();
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const char *file = "./test_l4lb.o";
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struct vip key = {.protocol = 6};
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struct vip_meta {
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__u32 flags;
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__u32 vip_num;
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} value = {.vip_num = VIP_NUM};
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__u32 stats_key = VIP_NUM;
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struct vip_stats {
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__u64 bytes;
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__u64 pkts;
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} stats[nr_cpus];
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struct real_definition {
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union {
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__be32 dst;
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__be32 dstv6[4];
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};
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__u8 flags;
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} real_def = {.dst = MAGIC_VAL};
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__u32 ch_key = 11, real_num = 3;
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__u32 duration, retval, size;
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int err, i, prog_fd, map_fd;
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__u64 bytes = 0, pkts = 0;
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struct bpf_object *obj;
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char buf[128];
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u32 *magic = (u32 *)buf;
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err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
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if (err)
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return;
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map_fd = bpf_find_map(__func__, obj, "vip_map");
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if (map_fd < 0)
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goto out;
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bpf_map_update_elem(map_fd, &key, &value, 0);
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map_fd = bpf_find_map(__func__, obj, "ch_rings");
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if (map_fd < 0)
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goto out;
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bpf_map_update_elem(map_fd, &ch_key, &real_num, 0);
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map_fd = bpf_find_map(__func__, obj, "reals");
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if (map_fd < 0)
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goto out;
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bpf_map_update_elem(map_fd, &real_num, &real_def, 0);
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err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v4, sizeof(pkt_v4),
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buf, &size, &retval, &duration);
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CHECK(err || errno || retval != 7/*TC_ACT_REDIRECT*/ || size != 54 ||
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*magic != MAGIC_VAL, "ipv4",
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"err %d errno %d retval %d size %d magic %x\n",
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err, errno, retval, size, *magic);
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err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v6, sizeof(pkt_v6),
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buf, &size, &retval, &duration);
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CHECK(err || errno || retval != 7/*TC_ACT_REDIRECT*/ || size != 74 ||
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*magic != MAGIC_VAL, "ipv6",
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"err %d errno %d retval %d size %d magic %x\n",
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err, errno, retval, size, *magic);
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map_fd = bpf_find_map(__func__, obj, "stats");
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if (map_fd < 0)
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goto out;
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bpf_map_lookup_elem(map_fd, &stats_key, stats);
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for (i = 0; i < nr_cpus; i++) {
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bytes += stats[i].bytes;
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pkts += stats[i].pkts;
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}
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if (bytes != MAGIC_BYTES * NUM_ITER * 2 || pkts != NUM_ITER * 2) {
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error_cnt++;
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printf("test_l4lb:FAIL:stats %lld %lld\n", bytes, pkts);
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}
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out:
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bpf_object__close(obj);
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}
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static void test_tcp_estats(void)
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{
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const char *file = "./test_tcp_estats.o";
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int err, prog_fd;
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struct bpf_object *obj;
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__u32 duration = 0;
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err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
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CHECK(err, "", "err %d errno %d\n", err, errno);
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if (err)
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return;
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bpf_object__close(obj);
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}
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static inline __u64 ptr_to_u64(const void *ptr)
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{
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return (__u64) (unsigned long) ptr;
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}
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static void test_bpf_obj_id(void)
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{
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const __u64 array_magic_value = 0xfaceb00c;
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const __u32 array_key = 0;
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const int nr_iters = 2;
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const char *file = "./test_obj_id.o";
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const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
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struct bpf_object *objs[nr_iters];
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int prog_fds[nr_iters], map_fds[nr_iters];
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/* +1 to test for the info_len returned by kernel */
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struct bpf_prog_info prog_infos[nr_iters + 1];
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struct bpf_map_info map_infos[nr_iters + 1];
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char jited_insns[128], xlated_insns[128];
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__u32 i, next_id, info_len, nr_id_found, duration = 0;
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int sysctl_fd, jit_enabled = 0, err = 0;
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__u64 array_value;
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sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
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if (sysctl_fd != -1) {
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char tmpc;
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if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
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jit_enabled = (tmpc != '0');
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close(sysctl_fd);
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}
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err = bpf_prog_get_fd_by_id(0);
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CHECK(err >= 0 || errno != ENOENT,
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"get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno);
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err = bpf_map_get_fd_by_id(0);
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CHECK(err >= 0 || errno != ENOENT,
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"get-fd-by-notexist-map-id", "err %d errno %d\n", err, errno);
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for (i = 0; i < nr_iters; i++)
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objs[i] = NULL;
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/* Check bpf_obj_get_info_by_fd() */
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for (i = 0; i < nr_iters; i++) {
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err = bpf_prog_load(file, BPF_PROG_TYPE_SOCKET_FILTER,
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&objs[i], &prog_fds[i]);
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/* test_obj_id.o is a dumb prog. It should never fail
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* to load.
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*/
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assert(!err);
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/* Check getting prog info */
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info_len = sizeof(struct bpf_prog_info) * 2;
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prog_infos[i].jited_prog_insns = ptr_to_u64(jited_insns);
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prog_infos[i].jited_prog_len = sizeof(jited_insns);
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prog_infos[i].xlated_prog_insns = ptr_to_u64(xlated_insns);
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prog_infos[i].xlated_prog_len = sizeof(xlated_insns);
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err = bpf_obj_get_info_by_fd(prog_fds[i], &prog_infos[i],
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&info_len);
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if (CHECK(err ||
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prog_infos[i].type != BPF_PROG_TYPE_SOCKET_FILTER ||
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info_len != sizeof(struct bpf_prog_info) ||
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(jit_enabled && !prog_infos[i].jited_prog_len) ||
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!prog_infos[i].xlated_prog_len,
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"get-prog-info(fd)",
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"err %d errno %d i %d type %d(%d) info_len %u(%lu) jit_enabled %d jited_prog_len %u xlated_prog_len %u\n",
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err, errno, i,
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prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER,
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info_len, sizeof(struct bpf_prog_info),
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jit_enabled,
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prog_infos[i].jited_prog_len,
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prog_infos[i].xlated_prog_len))
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goto done;
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map_fds[i] = bpf_find_map(__func__, objs[i], "test_map_id");
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assert(map_fds[i] >= 0);
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err = bpf_map_update_elem(map_fds[i], &array_key,
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&array_magic_value, 0);
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assert(!err);
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/* Check getting map info */
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info_len = sizeof(struct bpf_map_info) * 2;
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err = bpf_obj_get_info_by_fd(map_fds[i], &map_infos[i],
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&info_len);
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if (CHECK(err ||
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map_infos[i].type != BPF_MAP_TYPE_ARRAY ||
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map_infos[i].key_size != sizeof(__u32) ||
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map_infos[i].value_size != sizeof(__u64) ||
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map_infos[i].max_entries != 1 ||
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map_infos[i].map_flags != 0 ||
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info_len != sizeof(struct bpf_map_info),
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"get-map-info(fd)",
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"err %d errno %d type %d(%d) info_len %u(%lu) key_size %u value_size %u max_entries %u map_flags %X\n",
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err, errno,
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map_infos[i].type, BPF_MAP_TYPE_ARRAY,
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info_len, sizeof(struct bpf_map_info),
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map_infos[i].key_size,
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map_infos[i].value_size,
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map_infos[i].max_entries,
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map_infos[i].map_flags))
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goto done;
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}
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/* Check bpf_prog_get_next_id() */
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nr_id_found = 0;
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next_id = 0;
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while (!bpf_prog_get_next_id(next_id, &next_id)) {
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struct bpf_prog_info prog_info;
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int prog_fd;
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info_len = sizeof(prog_info);
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prog_fd = bpf_prog_get_fd_by_id(next_id);
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if (prog_fd < 0 && errno == ENOENT)
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/* The bpf_prog is in the dead row */
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continue;
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if (CHECK(prog_fd < 0, "get-prog-fd(next_id)",
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"prog_fd %d next_id %d errno %d\n",
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prog_fd, next_id, errno))
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break;
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for (i = 0; i < nr_iters; i++)
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if (prog_infos[i].id == next_id)
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break;
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if (i == nr_iters)
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continue;
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nr_id_found++;
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err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len);
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CHECK(err || info_len != sizeof(struct bpf_prog_info) ||
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memcmp(&prog_info, &prog_infos[i], info_len),
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"get-prog-info(next_id->fd)",
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"err %d errno %d info_len %u(%lu) memcmp %d\n",
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err, errno, info_len, sizeof(struct bpf_prog_info),
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memcmp(&prog_info, &prog_infos[i], info_len));
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close(prog_fd);
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}
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CHECK(nr_id_found != nr_iters,
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"check total prog id found by get_next_id",
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"nr_id_found %u(%u)\n",
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nr_id_found, nr_iters);
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/* Check bpf_map_get_next_id() */
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nr_id_found = 0;
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next_id = 0;
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while (!bpf_map_get_next_id(next_id, &next_id)) {
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struct bpf_map_info map_info;
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int map_fd;
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info_len = sizeof(map_info);
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map_fd = bpf_map_get_fd_by_id(next_id);
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if (map_fd < 0 && errno == ENOENT)
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/* The bpf_map is in the dead row */
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continue;
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if (CHECK(map_fd < 0, "get-map-fd(next_id)",
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"map_fd %d next_id %u errno %d\n",
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map_fd, next_id, errno))
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break;
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for (i = 0; i < nr_iters; i++)
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if (map_infos[i].id == next_id)
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break;
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if (i == nr_iters)
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continue;
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nr_id_found++;
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err = bpf_map_lookup_elem(map_fd, &array_key, &array_value);
|
|
assert(!err);
|
|
|
|
err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len);
|
|
CHECK(err || info_len != sizeof(struct bpf_map_info) ||
|
|
memcmp(&map_info, &map_infos[i], info_len) ||
|
|
array_value != array_magic_value,
|
|
"check get-map-info(next_id->fd)",
|
|
"err %d errno %d info_len %u(%lu) memcmp %d array_value %llu(%llu)\n",
|
|
err, errno, info_len, sizeof(struct bpf_map_info),
|
|
memcmp(&map_info, &map_infos[i], info_len),
|
|
array_value, array_magic_value);
|
|
|
|
close(map_fd);
|
|
}
|
|
CHECK(nr_id_found != nr_iters,
|
|
"check total map id found by get_next_id",
|
|
"nr_id_found %u(%u)\n",
|
|
nr_id_found, nr_iters);
|
|
|
|
done:
|
|
for (i = 0; i < nr_iters; i++)
|
|
bpf_object__close(objs[i]);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY };
|
|
|
|
setrlimit(RLIMIT_MEMLOCK, &rinf);
|
|
|
|
test_pkt_access();
|
|
test_xdp();
|
|
test_l4lb();
|
|
test_tcp_estats();
|
|
test_bpf_obj_id();
|
|
|
|
printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt);
|
|
return 0;
|
|
}
|