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// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include "tests.h"
#include "map.h"
#include "maps.h"
#include "dso.h"
#include "debug.h"
struct map_def {
const char *name;
u64 start;
u64 end;
};
struct check_maps_cb_args {
struct map_def *merged;
unsigned int i;
};
static int check_maps_cb(struct map *map, void *data)
{
struct check_maps_cb_args *args = data;
struct map_def *merged = &args->merged[args->i];
if (map__start(map) != merged->start ||
map__end(map) != merged->end ||
strcmp(map__dso(map)->name, merged->name) ||
refcount_read(map__refcnt(map)) != 1) {
return 1;
}
args->i++;
return 0;
}
static int failed_cb(struct map *map, void *data __maybe_unused)
{
pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
map__start(map),
map__end(map),
map__dso(map)->name,
refcount_read(map__refcnt(map)));
return 0;
}
static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
{
bool failed = false;
if (maps__nr_maps(maps) != size) {
pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
failed = true;
} else {
struct check_maps_cb_args args = {
.merged = merged,
.i = 0,
};
failed = maps__for_each_map(maps, check_maps_cb, &args);
}
if (failed) {
pr_debug("Expected:\n");
for (unsigned int i = 0; i < size; i++) {
pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
merged[i].start, merged[i].end, merged[i].name);
}
pr_debug("Got:\n");
maps__for_each_map(maps, failed_cb, NULL);
}
return failed ? TEST_FAIL : TEST_OK;
}
static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
{
unsigned int i;
struct map_def bpf_progs[] = {
{ "bpf_prog_1", 200, 300 },
{ "bpf_prog_2", 500, 600 },
{ "bpf_prog_3", 800, 900 },
};
struct map_def merged12[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
};
struct map_def merged3[] = {
{ "kcore1", 100, 200 },
{ "bpf_prog_1", 200, 300 },
{ "kcore1", 300, 500 },
{ "bpf_prog_2", 500, 600 },
{ "kcore1", 600, 800 },
{ "bpf_prog_3", 800, 900 },
{ "kcore1", 900, 1000 },
{ "kcore3", 1000, 1100 },
};
struct map *map_kcore1, *map_kcore2, *map_kcore3;
int ret;
struct maps *maps = maps__new(NULL);
TEST_ASSERT_VAL("failed to create maps", maps);
for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) {
struct map *map;
map = dso__new_map(bpf_progs[i].name);
TEST_ASSERT_VAL("failed to create map", map);
map__set_start(map, bpf_progs[i].start);
map__set_end(map, bpf_progs[i].end);
TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
map__put(map);
}
map_kcore1 = dso__new_map("kcore1");
TEST_ASSERT_VAL("failed to create map", map_kcore1);
map_kcore2 = dso__new_map("kcore2");
TEST_ASSERT_VAL("failed to create map", map_kcore2);
map_kcore3 = dso__new_map("kcore3");
TEST_ASSERT_VAL("failed to create map", map_kcore3);
/* kcore1 map overlaps over all bpf maps */
map__set_start(map_kcore1, 100);
map__set_end(map_kcore1, 1000);
/* kcore2 map hides behind bpf_prog_2 */
map__set_start(map_kcore2, 550);
map__set_end(map_kcore2, 570);
/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
map__set_start(map_kcore3, 880);
map__set_end(map_kcore3, 1100);
ret = maps__merge_in(maps, map_kcore1);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = maps__merge_in(maps, map_kcore2);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged12, ARRAY_SIZE(merged12), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
ret = maps__merge_in(maps, map_kcore3);
TEST_ASSERT_VAL("failed to merge map", !ret);
ret = check_maps(merged3, ARRAY_SIZE(merged3), maps);
TEST_ASSERT_VAL("merge check failed", !ret);
maps__zput(maps);
map__zput(map_kcore1);
map__zput(map_kcore2);
map__zput(map_kcore3);
return TEST_OK;
}
DEFINE_SUITE("maps__merge_in", maps__merge_in);
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