// SPDX-License-Identifier: GPL-2.0
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include "tests.h"
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#include "map.h"
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#include "maps.h"
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#include "dso.h"
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#include "debug.h"
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struct map_def {
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const char *name;
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u64 start;
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u64 end;
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};
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static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
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{
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struct map *map;
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unsigned int i = 0;
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maps__for_each_entry(maps, map) {
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if (i > 0)
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TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
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TEST_ASSERT_VAL("wrong map start", map->start == merged[i].start);
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TEST_ASSERT_VAL("wrong map end", map->end == merged[i].end);
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TEST_ASSERT_VAL("wrong map name", !strcmp(map->dso->name, merged[i].name));
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TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 1);
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i++;
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}
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return TEST_OK;
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}
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int test__maps__merge_in(struct test *t __maybe_unused, int subtest __maybe_unused)
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{
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struct maps maps;
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unsigned int i;
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struct map_def bpf_progs[] = {
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{ "bpf_prog_1", 200, 300 },
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{ "bpf_prog_2", 500, 600 },
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{ "bpf_prog_3", 800, 900 },
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};
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struct map_def merged12[] = {
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{ "kcore1", 100, 200 },
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{ "bpf_prog_1", 200, 300 },
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{ "kcore1", 300, 500 },
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{ "bpf_prog_2", 500, 600 },
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{ "kcore1", 600, 800 },
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{ "bpf_prog_3", 800, 900 },
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{ "kcore1", 900, 1000 },
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};
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struct map_def merged3[] = {
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{ "kcore1", 100, 200 },
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{ "bpf_prog_1", 200, 300 },
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{ "kcore1", 300, 500 },
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{ "bpf_prog_2", 500, 600 },
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{ "kcore1", 600, 800 },
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{ "bpf_prog_3", 800, 900 },
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{ "kcore1", 900, 1000 },
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{ "kcore3", 1000, 1100 },
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};
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struct map *map_kcore1, *map_kcore2, *map_kcore3;
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int ret;
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maps__init(&maps, NULL);
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for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
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struct map *map;
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map = dso__new_map(bpf_progs[i].name);
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TEST_ASSERT_VAL("failed to create map", map);
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map->start = bpf_progs[i].start;
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map->end = bpf_progs[i].end;
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maps__insert(&maps, map);
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map__put(map);
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}
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map_kcore1 = dso__new_map("kcore1");
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TEST_ASSERT_VAL("failed to create map", map_kcore1);
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map_kcore2 = dso__new_map("kcore2");
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TEST_ASSERT_VAL("failed to create map", map_kcore2);
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map_kcore3 = dso__new_map("kcore3");
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TEST_ASSERT_VAL("failed to create map", map_kcore3);
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/* kcore1 map overlaps over all bpf maps */
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map_kcore1->start = 100;
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map_kcore1->end = 1000;
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/* kcore2 map hides behind bpf_prog_2 */
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map_kcore2->start = 550;
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map_kcore2->end = 570;
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/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
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map_kcore3->start = 880;
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map_kcore3->end = 1100;
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ret = maps__merge_in(&maps, map_kcore1);
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TEST_ASSERT_VAL("failed to merge map", !ret);
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ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps);
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TEST_ASSERT_VAL("merge check failed", !ret);
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ret = maps__merge_in(&maps, map_kcore2);
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TEST_ASSERT_VAL("failed to merge map", !ret);
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ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps);
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TEST_ASSERT_VAL("merge check failed", !ret);
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ret = maps__merge_in(&maps, map_kcore3);
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TEST_ASSERT_VAL("failed to merge map", !ret);
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ret = check_maps(merged3, ARRAY_SIZE(merged3), &maps);
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TEST_ASSERT_VAL("merge check failed", !ret);
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maps__exit(&maps);
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return TEST_OK;
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}
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