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