1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/compiler.h> 3 #include <linux/kernel.h> 4 #include "tests.h" 5 #include "map.h" 6 #include "maps.h" 7 #include "dso.h" 8 #include "debug.h" 9 10 struct map_def { 11 const char *name; 12 u64 start; 13 u64 end; 14 }; 15 16 static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps) 17 { 18 struct map *map; 19 unsigned int i = 0; 20 21 maps__for_each_entry(maps, map) { 22 if (i > 0) 23 TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size)); 24 25 TEST_ASSERT_VAL("wrong map start", map->start == merged[i].start); 26 TEST_ASSERT_VAL("wrong map end", map->end == merged[i].end); 27 TEST_ASSERT_VAL("wrong map name", !strcmp(map->dso->name, merged[i].name)); 28 TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 1); 29 30 i++; 31 } 32 33 return TEST_OK; 34 } 35 36 static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused) 37 { 38 struct maps maps; 39 unsigned int i; 40 struct map_def bpf_progs[] = { 41 { "bpf_prog_1", 200, 300 }, 42 { "bpf_prog_2", 500, 600 }, 43 { "bpf_prog_3", 800, 900 }, 44 }; 45 struct map_def merged12[] = { 46 { "kcore1", 100, 200 }, 47 { "bpf_prog_1", 200, 300 }, 48 { "kcore1", 300, 500 }, 49 { "bpf_prog_2", 500, 600 }, 50 { "kcore1", 600, 800 }, 51 { "bpf_prog_3", 800, 900 }, 52 { "kcore1", 900, 1000 }, 53 }; 54 struct map_def merged3[] = { 55 { "kcore1", 100, 200 }, 56 { "bpf_prog_1", 200, 300 }, 57 { "kcore1", 300, 500 }, 58 { "bpf_prog_2", 500, 600 }, 59 { "kcore1", 600, 800 }, 60 { "bpf_prog_3", 800, 900 }, 61 { "kcore1", 900, 1000 }, 62 { "kcore3", 1000, 1100 }, 63 }; 64 struct map *map_kcore1, *map_kcore2, *map_kcore3; 65 int ret; 66 67 maps__init(&maps, NULL); 68 69 for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) { 70 struct map *map; 71 72 map = dso__new_map(bpf_progs[i].name); 73 TEST_ASSERT_VAL("failed to create map", map); 74 75 map->start = bpf_progs[i].start; 76 map->end = bpf_progs[i].end; 77 maps__insert(&maps, map); 78 map__put(map); 79 } 80 81 map_kcore1 = dso__new_map("kcore1"); 82 TEST_ASSERT_VAL("failed to create map", map_kcore1); 83 84 map_kcore2 = dso__new_map("kcore2"); 85 TEST_ASSERT_VAL("failed to create map", map_kcore2); 86 87 map_kcore3 = dso__new_map("kcore3"); 88 TEST_ASSERT_VAL("failed to create map", map_kcore3); 89 90 /* kcore1 map overlaps over all bpf maps */ 91 map_kcore1->start = 100; 92 map_kcore1->end = 1000; 93 94 /* kcore2 map hides behind bpf_prog_2 */ 95 map_kcore2->start = 550; 96 map_kcore2->end = 570; 97 98 /* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */ 99 map_kcore3->start = 880; 100 map_kcore3->end = 1100; 101 102 ret = maps__merge_in(&maps, map_kcore1); 103 TEST_ASSERT_VAL("failed to merge map", !ret); 104 105 ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps); 106 TEST_ASSERT_VAL("merge check failed", !ret); 107 108 ret = maps__merge_in(&maps, map_kcore2); 109 TEST_ASSERT_VAL("failed to merge map", !ret); 110 111 ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps); 112 TEST_ASSERT_VAL("merge check failed", !ret); 113 114 ret = maps__merge_in(&maps, map_kcore3); 115 TEST_ASSERT_VAL("failed to merge map", !ret); 116 117 ret = check_maps(merged3, ARRAY_SIZE(merged3), &maps); 118 TEST_ASSERT_VAL("merge check failed", !ret); 119 120 maps__exit(&maps); 121 return TEST_OK; 122 } 123 124 DEFINE_SUITE("maps__merge_in", maps__merge_in); 125