diff options
Diffstat (limited to 'tools/testing')
-rw-r--r-- | tools/testing/selftests/bpf/Makefile | 2 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_obj_id.c | 35 | ||||
-rw-r--r-- | tools/testing/selftests/bpf/test_progs.c | 191 |
3 files changed, 227 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index f389b02d43a0..9f0e07ba5334 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -14,7 +14,7 @@ LDLIBS += -lcap -lelf TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \ test_align -TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o +TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test_obj_id.o TEST_PROGS := test_kmod.sh diff --git a/tools/testing/selftests/bpf/test_obj_id.c b/tools/testing/selftests/bpf/test_obj_id.c new file mode 100644 index 000000000000..d8723aaf827a --- /dev/null +++ b/tools/testing/selftests/bpf/test_obj_id.c @@ -0,0 +1,35 @@ +/* Copyright (c) 2017 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ +#include <stddef.h> +#include <linux/bpf.h> +#include <linux/pkt_cls.h> +#include "bpf_helpers.h" + +/* It is a dumb bpf program such that it must have no + * issue to be loaded since testing the verifier is + * not the focus here. + */ + +int _version SEC("version") = 1; + +struct bpf_map_def SEC("maps") test_map_id = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(__u32), + .value_size = sizeof(__u64), + .max_entries = 1, +}; + +SEC("test_prog_id") +int test_prog_id(struct __sk_buff *skb) +{ + __u32 key = 0; + __u64 *value; + + value = bpf_map_lookup_elem(&test_map_id, &key); + + return TC_ACT_OK; +} diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index b59f5ed4ae40..8189bfc7e277 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -22,6 +22,8 @@ typedef __u16 __sum16; #include <sys/wait.h> #include <sys/resource.h> +#include <sys/types.h> +#include <pwd.h> #include <linux/bpf.h> #include <linux/err.h> @@ -70,6 +72,7 @@ static struct { pass_cnt++; \ printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\ } \ + __ret; \ }) static int bpf_prog_load(const char *file, enum bpf_prog_type type, @@ -283,6 +286,193 @@ static void test_tcp_estats(void) bpf_object__close(obj); } +static inline __u64 ptr_to_u64(const void *ptr) +{ + return (__u64) (unsigned long) ptr; +} + +static void test_bpf_obj_id(void) +{ + const __u64 array_magic_value = 0xfaceb00c; + const __u32 array_key = 0; + const int nr_iters = 2; + const char *file = "./test_obj_id.o"; + + struct bpf_object *objs[nr_iters]; + int prog_fds[nr_iters], map_fds[nr_iters]; + /* +1 to test for the info_len returned by kernel */ + struct bpf_prog_info prog_infos[nr_iters + 1]; + struct bpf_map_info map_infos[nr_iters + 1]; + char jited_insns[128], xlated_insns[128]; + __u32 i, next_id, info_len, nr_id_found, duration = 0; + int err = 0; + __u64 array_value; + + err = bpf_prog_get_fd_by_id(0); + CHECK(err >= 0 || errno != ENOENT, + "get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno); + + err = bpf_map_get_fd_by_id(0); + CHECK(err >= 0 || errno != ENOENT, + "get-fd-by-notexist-map-id", "err %d errno %d\n", err, errno); + + for (i = 0; i < nr_iters; i++) + objs[i] = NULL; + + /* Check bpf_obj_get_info_by_fd() */ + for (i = 0; i < nr_iters; i++) { + err = bpf_prog_load(file, BPF_PROG_TYPE_SOCKET_FILTER, + &objs[i], &prog_fds[i]); + /* test_obj_id.o is a dumb prog. It should never fail + * to load. + */ + assert(!err); + + /* Check getting prog info */ + info_len = sizeof(struct bpf_prog_info) * 2; + prog_infos[i].jited_prog_insns = ptr_to_u64(jited_insns); + prog_infos[i].jited_prog_len = sizeof(jited_insns); + prog_infos[i].xlated_prog_insns = ptr_to_u64(xlated_insns); + prog_infos[i].xlated_prog_len = sizeof(xlated_insns); + err = bpf_obj_get_info_by_fd(prog_fds[i], &prog_infos[i], + &info_len); + if (CHECK(err || + prog_infos[i].type != BPF_PROG_TYPE_SOCKET_FILTER || + info_len != sizeof(struct bpf_prog_info) || + !prog_infos[i].jited_prog_len || + !prog_infos[i].xlated_prog_len, + "get-prog-info(fd)", + "err %d errno %d i %d type %d(%d) info_len %u(%lu) jited_prog_len %u xlated_prog_len %u\n", + err, errno, i, + prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER, + info_len, sizeof(struct bpf_prog_info), + prog_infos[i].jited_prog_len, + prog_infos[i].xlated_prog_len)) + goto done; + + map_fds[i] = bpf_find_map(__func__, objs[i], "test_map_id"); + assert(map_fds[i] >= 0); + err = bpf_map_update_elem(map_fds[i], &array_key, + &array_magic_value, 0); + assert(!err); + + /* Check getting map info */ + info_len = sizeof(struct bpf_map_info) * 2; + err = bpf_obj_get_info_by_fd(map_fds[i], &map_infos[i], + &info_len); + if (CHECK(err || + map_infos[i].type != BPF_MAP_TYPE_ARRAY || + map_infos[i].key_size != sizeof(__u32) || + map_infos[i].value_size != sizeof(__u64) || + map_infos[i].max_entries != 1 || + map_infos[i].map_flags != 0 || + info_len != sizeof(struct bpf_map_info), + "get-map-info(fd)", + "err %d errno %d type %d(%d) info_len %u(%lu) key_size %u value_size %u max_entries %u map_flags %X\n", + err, errno, + map_infos[i].type, BPF_MAP_TYPE_ARRAY, + info_len, sizeof(struct bpf_map_info), + map_infos[i].key_size, + map_infos[i].value_size, + map_infos[i].max_entries, + map_infos[i].map_flags)) + goto done; + } + + /* Check bpf_prog_get_next_id() */ + nr_id_found = 0; + next_id = 0; + while (!bpf_prog_get_next_id(next_id, &next_id)) { + struct bpf_prog_info prog_info; + int prog_fd; + + info_len = sizeof(prog_info); + + prog_fd = bpf_prog_get_fd_by_id(next_id); + if (prog_fd < 0 && errno == ENOENT) + /* The bpf_prog is in the dead row */ + continue; + if (CHECK(prog_fd < 0, "get-prog-fd(next_id)", + "prog_fd %d next_id %d errno %d\n", + prog_fd, next_id, errno)) + break; + + for (i = 0; i < nr_iters; i++) + if (prog_infos[i].id == next_id) + break; + + if (i == nr_iters) + continue; + + nr_id_found++; + + err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len); + CHECK(err || info_len != sizeof(struct bpf_prog_info) || + memcmp(&prog_info, &prog_infos[i], info_len), + "get-prog-info(next_id->fd)", + "err %d errno %d info_len %u(%lu) memcmp %d\n", + err, errno, info_len, sizeof(struct bpf_prog_info), + memcmp(&prog_info, &prog_infos[i], info_len)); + + close(prog_fd); + } + CHECK(nr_id_found != nr_iters, + "check total prog id found by get_next_id", + "nr_id_found %u(%u)\n", + nr_id_found, nr_iters); + + /* Check bpf_map_get_next_id() */ + nr_id_found = 0; + next_id = 0; + while (!bpf_map_get_next_id(next_id, &next_id)) { + struct bpf_map_info map_info; + int map_fd; + + info_len = sizeof(map_info); + + map_fd = bpf_map_get_fd_by_id(next_id); + if (map_fd < 0 && errno == ENOENT) + /* The bpf_map is in the dead row */ + continue; + if (CHECK(map_fd < 0, "get-map-fd(next_id)", + "map_fd %d next_id %u errno %d\n", + map_fd, next_id, errno)) + break; + + for (i = 0; i < nr_iters; i++) + if (map_infos[i].id == next_id) + break; + + if (i == nr_iters) + continue; + + nr_id_found++; + + err = bpf_map_lookup_elem(map_fd, &array_key, &array_value); + assert(!err); + + err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len); + CHECK(err || info_len != sizeof(struct bpf_map_info) || + memcmp(&map_info, &map_infos[i], info_len) || + array_value != array_magic_value, + "check get-map-info(next_id->fd)", + "err %d errno %d info_len %u(%lu) memcmp %d array_value %llu(%llu)\n", + err, errno, info_len, sizeof(struct bpf_map_info), + memcmp(&map_info, &map_infos[i], info_len), + array_value, array_magic_value); + + close(map_fd); + } + CHECK(nr_id_found != nr_iters, + "check total map id found by get_next_id", + "nr_id_found %u(%u)\n", + nr_id_found, nr_iters); + +done: + for (i = 0; i < nr_iters; i++) + bpf_object__close(objs[i]); +} + int main(void) { struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY }; @@ -293,6 +483,7 @@ int main(void) test_xdp(); test_l4lb(); test_tcp_estats(); + test_bpf_obj_id(); printf("Summary: %d PASSED, %d FAILED\n", pass_cnt, error_cnt); return 0; |