166 lines
4.2 KiB
C
166 lines
4.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <inttypes.h>
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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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struct check_maps_cb_args {
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struct map_def *merged;
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unsigned int i;
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};
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static int check_maps_cb(struct map *map, void *data)
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{
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struct check_maps_cb_args *args = data;
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struct map_def *merged = &args->merged[args->i];
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if (map__start(map) != merged->start ||
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map__end(map) != merged->end ||
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strcmp(dso__name(map__dso(map)), merged->name) ||
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refcount_read(map__refcnt(map)) != 1) {
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return 1;
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}
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args->i++;
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return 0;
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}
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static int failed_cb(struct map *map, void *data __maybe_unused)
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{
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pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
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map__start(map),
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map__end(map),
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dso__name(map__dso(map)),
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refcount_read(map__refcnt(map)));
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return 0;
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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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bool failed = false;
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if (maps__nr_maps(maps) != size) {
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pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
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failed = true;
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} else {
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struct check_maps_cb_args args = {
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.merged = merged,
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.i = 0,
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};
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failed = maps__for_each_map(maps, check_maps_cb, &args);
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}
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if (failed) {
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pr_debug("Expected:\n");
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for (unsigned int i = 0; i < size; i++) {
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pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
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merged[i].start, merged[i].end, merged[i].name);
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}
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pr_debug("Got:\n");
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maps__for_each_map(maps, failed_cb, NULL);
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}
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return failed ? TEST_FAIL : TEST_OK;
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}
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static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
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{
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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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struct maps *maps = maps__new(NULL);
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TEST_ASSERT_VAL("failed to create maps", maps);
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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__set_start(map, bpf_progs[i].start);
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map__set_end(map, bpf_progs[i].end);
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TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
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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__set_start(map_kcore1, 100);
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map__set_end(map_kcore1, 1000);
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/* kcore2 map hides behind bpf_prog_2 */
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map__set_start(map_kcore2, 550);
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map__set_end(map_kcore2, 570);
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/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
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map__set_start(map_kcore3, 880);
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map__set_end(map_kcore3, 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__zput(maps);
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map__zput(map_kcore1);
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map__zput(map_kcore2);
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map__zput(map_kcore3);
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return TEST_OK;
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}
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DEFINE_SUITE("maps__merge_in", maps__merge_in);
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