1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/compiler.h>
3*4882a593Smuzhiyun #include <linux/kernel.h>
4*4882a593Smuzhiyun #include "tests.h"
5*4882a593Smuzhiyun #include "map.h"
6*4882a593Smuzhiyun #include "maps.h"
7*4882a593Smuzhiyun #include "dso.h"
8*4882a593Smuzhiyun #include "debug.h"
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun struct map_def {
11*4882a593Smuzhiyun const char *name;
12*4882a593Smuzhiyun u64 start;
13*4882a593Smuzhiyun u64 end;
14*4882a593Smuzhiyun };
15*4882a593Smuzhiyun
check_maps(struct map_def * merged,unsigned int size,struct maps * maps)16*4882a593Smuzhiyun static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct map *map;
19*4882a593Smuzhiyun unsigned int i = 0;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun maps__for_each_entry(maps, map) {
22*4882a593Smuzhiyun if (i > 0)
23*4882a593Smuzhiyun TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun TEST_ASSERT_VAL("wrong map start", map->start == merged[i].start);
26*4882a593Smuzhiyun TEST_ASSERT_VAL("wrong map end", map->end == merged[i].end);
27*4882a593Smuzhiyun TEST_ASSERT_VAL("wrong map name", !strcmp(map->dso->name, merged[i].name));
28*4882a593Smuzhiyun TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 1);
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun i++;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun return TEST_OK;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
test__maps__merge_in(struct test * t __maybe_unused,int subtest __maybe_unused)36*4882a593Smuzhiyun int test__maps__merge_in(struct test *t __maybe_unused, int subtest __maybe_unused)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct maps maps;
39*4882a593Smuzhiyun unsigned int i;
40*4882a593Smuzhiyun struct map_def bpf_progs[] = {
41*4882a593Smuzhiyun { "bpf_prog_1", 200, 300 },
42*4882a593Smuzhiyun { "bpf_prog_2", 500, 600 },
43*4882a593Smuzhiyun { "bpf_prog_3", 800, 900 },
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun struct map_def merged12[] = {
46*4882a593Smuzhiyun { "kcore1", 100, 200 },
47*4882a593Smuzhiyun { "bpf_prog_1", 200, 300 },
48*4882a593Smuzhiyun { "kcore1", 300, 500 },
49*4882a593Smuzhiyun { "bpf_prog_2", 500, 600 },
50*4882a593Smuzhiyun { "kcore1", 600, 800 },
51*4882a593Smuzhiyun { "bpf_prog_3", 800, 900 },
52*4882a593Smuzhiyun { "kcore1", 900, 1000 },
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun struct map_def merged3[] = {
55*4882a593Smuzhiyun { "kcore1", 100, 200 },
56*4882a593Smuzhiyun { "bpf_prog_1", 200, 300 },
57*4882a593Smuzhiyun { "kcore1", 300, 500 },
58*4882a593Smuzhiyun { "bpf_prog_2", 500, 600 },
59*4882a593Smuzhiyun { "kcore1", 600, 800 },
60*4882a593Smuzhiyun { "bpf_prog_3", 800, 900 },
61*4882a593Smuzhiyun { "kcore1", 900, 1000 },
62*4882a593Smuzhiyun { "kcore3", 1000, 1100 },
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun struct map *map_kcore1, *map_kcore2, *map_kcore3;
65*4882a593Smuzhiyun int ret;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun maps__init(&maps, NULL);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
70*4882a593Smuzhiyun struct map *map;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun map = dso__new_map(bpf_progs[i].name);
73*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to create map", map);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun map->start = bpf_progs[i].start;
76*4882a593Smuzhiyun map->end = bpf_progs[i].end;
77*4882a593Smuzhiyun maps__insert(&maps, map);
78*4882a593Smuzhiyun map__put(map);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun map_kcore1 = dso__new_map("kcore1");
82*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to create map", map_kcore1);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun map_kcore2 = dso__new_map("kcore2");
85*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to create map", map_kcore2);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun map_kcore3 = dso__new_map("kcore3");
88*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to create map", map_kcore3);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun /* kcore1 map overlaps over all bpf maps */
91*4882a593Smuzhiyun map_kcore1->start = 100;
92*4882a593Smuzhiyun map_kcore1->end = 1000;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun /* kcore2 map hides behind bpf_prog_2 */
95*4882a593Smuzhiyun map_kcore2->start = 550;
96*4882a593Smuzhiyun map_kcore2->end = 570;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun /* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
99*4882a593Smuzhiyun map_kcore3->start = 880;
100*4882a593Smuzhiyun map_kcore3->end = 1100;
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun ret = maps__merge_in(&maps, map_kcore1);
103*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to merge map", !ret);
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps);
106*4882a593Smuzhiyun TEST_ASSERT_VAL("merge check failed", !ret);
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun ret = maps__merge_in(&maps, map_kcore2);
109*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to merge map", !ret);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps);
112*4882a593Smuzhiyun TEST_ASSERT_VAL("merge check failed", !ret);
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun ret = maps__merge_in(&maps, map_kcore3);
115*4882a593Smuzhiyun TEST_ASSERT_VAL("failed to merge map", !ret);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun ret = check_maps(merged3, ARRAY_SIZE(merged3), &maps);
118*4882a593Smuzhiyun TEST_ASSERT_VAL("merge check failed", !ret);
119*4882a593Smuzhiyun
120*4882a593Smuzhiyun maps__exit(&maps);
121*4882a593Smuzhiyun return TEST_OK;
122*4882a593Smuzhiyun }
123