1 // SPDX-License-Identifier: GPL-2.0 2 #include <inttypes.h> 3 #include <linux/compiler.h> 4 #include <linux/kernel.h> 5 #include "tests.h" 6 #include "map.h" 7 #include "maps.h" 8 #include "dso.h" 9 #include "debug.h" 10 11 struct map_def { 12 const char *name; 13 u64 start; 14 u64 end; 15 }; 16 17 static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps) 18 { 19 struct map_rb_node *rb_node; 20 unsigned int i = 0; 21 bool failed = false; 22 23 if (maps__nr_maps(maps) != size) { 24 pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps)); 25 failed = true; 26 } else { 27 maps__for_each_entry(maps, rb_node) { 28 struct map *map = rb_node->map; 29 30 if (map__start(map) != merged[i].start || 31 map__end(map) != merged[i].end || 32 strcmp(map__dso(map)->name, merged[i].name) || 33 refcount_read(map__refcnt(map)) != 1) { 34 failed = true; 35 } 36 i++; 37 } 38 } 39 if (failed) { 40 pr_debug("Expected:\n"); 41 for (i = 0; i < size; i++) { 42 pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n", 43 merged[i].start, merged[i].end, merged[i].name); 44 } 45 pr_debug("Got:\n"); 46 maps__for_each_entry(maps, rb_node) { 47 struct map *map = rb_node->map; 48 49 pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n", 50 map__start(map), 51 map__end(map), 52 map__dso(map)->name, 53 refcount_read(map__refcnt(map))); 54 } 55 } 56 return failed ? TEST_FAIL : TEST_OK; 57 } 58 59 static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused) 60 { 61 unsigned int i; 62 struct map_def bpf_progs[] = { 63 { "bpf_prog_1", 200, 300 }, 64 { "bpf_prog_2", 500, 600 }, 65 { "bpf_prog_3", 800, 900 }, 66 }; 67 struct map_def merged12[] = { 68 { "kcore1", 100, 200 }, 69 { "bpf_prog_1", 200, 300 }, 70 { "kcore1", 300, 500 }, 71 { "bpf_prog_2", 500, 600 }, 72 { "kcore1", 600, 800 }, 73 { "bpf_prog_3", 800, 900 }, 74 { "kcore1", 900, 1000 }, 75 }; 76 struct map_def merged3[] = { 77 { "kcore1", 100, 200 }, 78 { "bpf_prog_1", 200, 300 }, 79 { "kcore1", 300, 500 }, 80 { "bpf_prog_2", 500, 600 }, 81 { "kcore1", 600, 800 }, 82 { "bpf_prog_3", 800, 900 }, 83 { "kcore1", 900, 1000 }, 84 { "kcore3", 1000, 1100 }, 85 }; 86 struct map *map_kcore1, *map_kcore2, *map_kcore3; 87 int ret; 88 struct maps *maps = maps__new(NULL); 89 90 TEST_ASSERT_VAL("failed to create maps", maps); 91 92 for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) { 93 struct map *map; 94 95 map = dso__new_map(bpf_progs[i].name); 96 TEST_ASSERT_VAL("failed to create map", map); 97 98 map__set_start(map, bpf_progs[i].start); 99 map__set_end(map, bpf_progs[i].end); 100 TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0); 101 map__put(map); 102 } 103 104 map_kcore1 = dso__new_map("kcore1"); 105 TEST_ASSERT_VAL("failed to create map", map_kcore1); 106 107 map_kcore2 = dso__new_map("kcore2"); 108 TEST_ASSERT_VAL("failed to create map", map_kcore2); 109 110 map_kcore3 = dso__new_map("kcore3"); 111 TEST_ASSERT_VAL("failed to create map", map_kcore3); 112 113 /* kcore1 map overlaps over all bpf maps */ 114 map__set_start(map_kcore1, 100); 115 map__set_end(map_kcore1, 1000); 116 117 /* kcore2 map hides behind bpf_prog_2 */ 118 map__set_start(map_kcore2, 550); 119 map__set_end(map_kcore2, 570); 120 121 /* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */ 122 map__set_start(map_kcore3, 880); 123 map__set_end(map_kcore3, 1100); 124 125 ret = maps__merge_in(maps, map_kcore1); 126 TEST_ASSERT_VAL("failed to merge map", !ret); 127 128 ret = check_maps(merged12, ARRAY_SIZE(merged12), maps); 129 TEST_ASSERT_VAL("merge check failed", !ret); 130 131 ret = maps__merge_in(maps, map_kcore2); 132 TEST_ASSERT_VAL("failed to merge map", !ret); 133 134 ret = check_maps(merged12, ARRAY_SIZE(merged12), maps); 135 TEST_ASSERT_VAL("merge check failed", !ret); 136 137 ret = maps__merge_in(maps, map_kcore3); 138 TEST_ASSERT_VAL("failed to merge map", !ret); 139 140 ret = check_maps(merged3, ARRAY_SIZE(merged3), maps); 141 TEST_ASSERT_VAL("merge check failed", !ret); 142 143 maps__delete(maps); 144 return TEST_OK; 145 } 146 147 DEFINE_SUITE("maps__merge_in", maps__merge_in); 148