projects/linux·blob master · refs

108 lines · 2.8 KiB

1// SPDX-License-Identifier: GPL-2.0
2#include <test_progs.h>
3#include <network_helpers.h>
4
5enum {
6 QUEUE,
7 STACK,
8};
9
10static void test_queue_stack_map_by_type(int type)
11{
12 const int MAP_SIZE = 32;
13 __u32 vals[MAP_SIZE], val;
14 int i, err, prog_fd, map_in_fd, map_out_fd;
15 char file[32], buf[128];
16 struct bpf_object *obj;
17 struct iphdr iph = {};
18 LIBBPF_OPTS(bpf_test_run_opts, topts,
19 .data_in = &pkt_v4,
20 .data_size_in = sizeof(pkt_v4),
21 .data_out = buf,
22 .data_size_out = sizeof(buf),
23 .repeat = 1,
24 );
25
26 /* Fill test values to be used */
27 for (i = 0; i < MAP_SIZE; i++)
28 vals[i] = rand();
29
30 if (type == QUEUE)
31 strscpy(file, "./test_queue_map.bpf.o");
32 else if (type == STACK)
33 strscpy(file, "./test_stack_map.bpf.o");
34 else
35 return;
36
37 err = bpf_prog_test_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
38 if (CHECK_FAIL(err))
39 return;
40
41 map_in_fd = bpf_find_map(__func__, obj, "map_in");
42 if (map_in_fd < 0)
43 goto out;
44
45 map_out_fd = bpf_find_map(__func__, obj, "map_out");
46 if (map_out_fd < 0)
47 goto out;
48
49 /* Push 32 elements to the input map */
50 for (i = 0; i < MAP_SIZE; i++) {
51 err = bpf_map_update_elem(map_in_fd, NULL, &vals[i], 0);
52 if (CHECK_FAIL(err))
53 goto out;
54 }
55
56 /* The eBPF program pushes iph.saddr in the output map,
57 * pops the input map and saves this value in iph.daddr
58 */
59 for (i = 0; i < MAP_SIZE; i++) {
60 if (type == QUEUE) {
61 val = vals[i];
62 pkt_v4.iph.saddr = vals[i] * 5;
63 } else if (type == STACK) {
64 val = vals[MAP_SIZE - 1 - i];
65 pkt_v4.iph.saddr = vals[MAP_SIZE - 1 - i] * 5;
66 }
67
68 topts.data_size_out = sizeof(buf);
69 err = bpf_prog_test_run_opts(prog_fd, &topts);
70 if (err || topts.retval ||
71 topts.data_size_out != sizeof(pkt_v4))
72 break;
73 memcpy(&iph, buf + sizeof(struct ethhdr), sizeof(iph));
74 if (iph.daddr != val)
75 break;
76 }
77
78 ASSERT_OK(err, "bpf_map_pop_elem");
79 ASSERT_OK(topts.retval, "bpf_map_pop_elem test retval");
80 ASSERT_EQ(topts.data_size_out, sizeof(pkt_v4),
81 "bpf_map_pop_elem data_size_out");
82 ASSERT_EQ(iph.daddr, val, "bpf_map_pop_elem iph.daddr");
83
84 /* Queue is empty, program should return TC_ACT_SHOT */
85 topts.data_size_out = sizeof(buf);
86 err = bpf_prog_test_run_opts(prog_fd, &topts);
87 ASSERT_OK(err, "check-queue-stack-map-empty");
88 ASSERT_EQ(topts.retval, 2 /* TC_ACT_SHOT */,
89 "check-queue-stack-map-empty test retval");
90 ASSERT_EQ(topts.data_size_out, sizeof(pkt_v4),
91 "check-queue-stack-map-empty data_size_out");
92
93 /* Check that the program pushed elements correctly */
94 for (i = 0; i < MAP_SIZE; i++) {
95 err = bpf_map_lookup_and_delete_elem(map_out_fd, NULL, &val);
96 ASSERT_OK(err, "bpf_map_lookup_and_delete_elem");
97 ASSERT_EQ(val, vals[i] * 5, "bpf_map_push_elem val");
98 }
99out:
100 pkt_v4.iph.saddr = 0;
101 bpf_object__close(obj);
102}
103
104void test_queue_stack_map(void)
105{
106 test_queue_stack_map_by_type(QUEUE);
107 test_queue_stack_map_by_type(STACK);
108}