tools/bpf: refactor test_btf pretty printing for multiple map value formats
The test_btf pretty print is refactored in order to easily support multiple map value formats. The next patch will add __int128 type tests which needs macro guard __SIZEOF_INT128__. There is no functionality change with this patch. Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Yonghong Song
Daniel Borkmann
parent
a80eba20ed
commit
ce6ec47a10
@ -18,6 +18,7 @@
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <assert.h>
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#include <bpf/libbpf.h>
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#include <bpf/btf.h>
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@ -134,6 +135,11 @@ static struct btf_header hdr_tmpl = {
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.hdr_len = sizeof(struct btf_header),
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};
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/* several different mapv kinds(types) supported by pprint */
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enum pprint_mapv_kind_t {
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PPRINT_MAPV_KIND_BASIC = 0,
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};
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struct btf_raw_test {
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const char *descr;
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const char *str_sec;
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@ -156,6 +162,7 @@ struct btf_raw_test {
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int type_off_delta;
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int str_off_delta;
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int str_len_delta;
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enum pprint_mapv_kind_t mapv_kind;
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};
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#define BTF_STR_SEC(str) \
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@ -3880,26 +3887,71 @@ static struct btf_pprint_test_meta {
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};
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static size_t get_pprint_mapv_size(enum pprint_mapv_kind_t mapv_kind)
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{
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if (mapv_kind == PPRINT_MAPV_KIND_BASIC)
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return sizeof(struct pprint_mapv);
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static void set_pprint_mapv(struct pprint_mapv *v, uint32_t i,
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assert(0);
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}
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static void set_pprint_mapv(enum pprint_mapv_kind_t mapv_kind,
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void *mapv, uint32_t i,
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int num_cpus, int rounded_value_size)
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{
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int cpu;
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for (cpu = 0; cpu < num_cpus; cpu++) {
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v->ui32 = i + cpu;
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v->si32 = -i;
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v->unused_bits2a = 3;
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v->bits28 = i;
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v->unused_bits2b = 3;
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v->ui64 = i;
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v->aenum = i & 0x03;
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v->ui32b = 4;
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v->bits2c = 1;
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v = (void *)v + rounded_value_size;
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if (mapv_kind == PPRINT_MAPV_KIND_BASIC) {
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struct pprint_mapv *v = mapv;
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for (cpu = 0; cpu < num_cpus; cpu++) {
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v->ui32 = i + cpu;
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v->si32 = -i;
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v->unused_bits2a = 3;
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v->bits28 = i;
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v->unused_bits2b = 3;
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v->ui64 = i;
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v->aenum = i & 0x03;
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v->ui32b = 4;
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v->bits2c = 1;
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v = (void *)v + rounded_value_size;
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}
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}
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}
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ssize_t get_pprint_expected_line(enum pprint_mapv_kind_t mapv_kind,
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char *expected_line, ssize_t line_size,
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bool percpu_map, unsigned int next_key,
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int cpu, void *mapv)
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{
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ssize_t nexpected_line = -1;
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if (mapv_kind == PPRINT_MAPV_KIND_BASIC) {
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struct pprint_mapv *v = mapv;
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nexpected_line = snprintf(expected_line, line_size,
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"%s%u: {%u,0,%d,0x%x,0x%x,0x%x,"
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"{%lu|[%u,%u,%u,%u,%u,%u,%u,%u]},%s,"
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"%u,0x%x}\n",
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percpu_map ? "\tcpu" : "",
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percpu_map ? cpu : next_key,
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v->ui32, v->si32,
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v->unused_bits2a,
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v->bits28,
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v->unused_bits2b,
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v->ui64,
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v->ui8a[0], v->ui8a[1],
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v->ui8a[2], v->ui8a[3],
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v->ui8a[4], v->ui8a[5],
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v->ui8a[6], v->ui8a[7],
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pprint_enum_str[v->aenum],
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v->ui32b,
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v->bits2c);
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}
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return nexpected_line;
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}
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static int check_line(const char *expected_line, int nexpected_line,
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int expected_line_len, const char *line)
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{
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@ -3921,10 +3973,10 @@ static int check_line(const char *expected_line, int nexpected_line,
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static int do_test_pprint(int test_num)
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{
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const struct btf_raw_test *test = &pprint_test_template[test_num];
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enum pprint_mapv_kind_t mapv_kind = test->mapv_kind;
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struct bpf_create_map_attr create_attr = {};
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bool ordered_map, lossless_map, percpu_map;
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int err, ret, num_cpus, rounded_value_size;
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struct pprint_mapv *mapv = NULL;
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unsigned int key, nr_read_elems;
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int map_fd = -1, btf_fd = -1;
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unsigned int raw_btf_size;
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@ -3933,6 +3985,7 @@ static int do_test_pprint(int test_num)
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char pin_path[255];
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size_t line_len = 0;
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char *line = NULL;
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void *mapv = NULL;
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uint8_t *raw_btf;
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ssize_t nread;
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@ -3985,7 +4038,7 @@ static int do_test_pprint(int test_num)
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percpu_map = test->percpu_map;
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num_cpus = percpu_map ? bpf_num_possible_cpus() : 1;
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rounded_value_size = round_up(sizeof(struct pprint_mapv), 8);
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rounded_value_size = round_up(get_pprint_mapv_size(mapv_kind), 8);
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mapv = calloc(num_cpus, rounded_value_size);
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if (CHECK(!mapv, "mapv allocation failure")) {
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err = -1;
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@ -3993,7 +4046,7 @@ static int do_test_pprint(int test_num)
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}
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for (key = 0; key < test->max_entries; key++) {
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set_pprint_mapv(mapv, key, num_cpus, rounded_value_size);
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set_pprint_mapv(mapv_kind, mapv, key, num_cpus, rounded_value_size);
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bpf_map_update_elem(map_fd, &key, mapv, 0);
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}
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@ -4017,13 +4070,13 @@ static int do_test_pprint(int test_num)
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ordered_map = test->ordered_map;
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lossless_map = test->lossless_map;
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do {
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struct pprint_mapv *cmapv;
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ssize_t nexpected_line;
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unsigned int next_key;
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void *cmapv;
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int cpu;
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next_key = ordered_map ? nr_read_elems : atoi(line);
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set_pprint_mapv(mapv, next_key, num_cpus, rounded_value_size);
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set_pprint_mapv(mapv_kind, mapv, next_key, num_cpus, rounded_value_size);
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cmapv = mapv;
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for (cpu = 0; cpu < num_cpus; cpu++) {
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@ -4056,31 +4109,16 @@ static int do_test_pprint(int test_num)
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break;
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}
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nexpected_line = snprintf(expected_line, sizeof(expected_line),
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"%s%u: {%u,0,%d,0x%x,0x%x,0x%x,"
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"{%lu|[%u,%u,%u,%u,%u,%u,%u,%u]},%s,"
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"%u,0x%x}\n",
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percpu_map ? "\tcpu" : "",
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percpu_map ? cpu : next_key,
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cmapv->ui32, cmapv->si32,
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cmapv->unused_bits2a,
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cmapv->bits28,
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cmapv->unused_bits2b,
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cmapv->ui64,
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cmapv->ui8a[0], cmapv->ui8a[1],
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cmapv->ui8a[2], cmapv->ui8a[3],
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cmapv->ui8a[4], cmapv->ui8a[5],
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cmapv->ui8a[6], cmapv->ui8a[7],
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pprint_enum_str[cmapv->aenum],
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cmapv->ui32b,
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cmapv->bits2c);
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nexpected_line = get_pprint_expected_line(mapv_kind, expected_line,
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sizeof(expected_line),
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percpu_map, next_key,
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cpu, cmapv);
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err = check_line(expected_line, nexpected_line,
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sizeof(expected_line), line);
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if (err == -1)
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goto done;
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cmapv = (void *)cmapv + rounded_value_size;
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cmapv = cmapv + rounded_value_size;
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}
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if (percpu_map) {
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