diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests')
26 files changed, 1177 insertions, 116 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/atomic_bounds.c b/tools/testing/selftests/bpf/prog_tests/atomic_bounds.c new file mode 100644 index 000000000000..69bd7853e8f1 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/atomic_bounds.c @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <test_progs.h> + +#include "atomic_bounds.skel.h" + +void test_atomic_bounds(void) +{ + struct atomic_bounds *skel; + __u32 duration = 0; + + skel = atomic_bounds__open_and_load(); + if (CHECK(!skel, "skel_load", "couldn't load program\n")) + return; + + atomic_bounds__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/atomics.c b/tools/testing/selftests/bpf/prog_tests/atomics.c new file mode 100644 index 000000000000..21efe7bbf10d --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/atomics.c @@ -0,0 +1,246 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <test_progs.h> + +#include "atomics.skel.h" + +static void test_add(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.add); + if (CHECK(IS_ERR(link), "attach(add)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.add); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run add", + "err %d errno %d retval %d duration %d\n", err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->add64_value, 3, "add64_value"); + ASSERT_EQ(skel->bss->add64_result, 1, "add64_result"); + + ASSERT_EQ(skel->data->add32_value, 3, "add32_value"); + ASSERT_EQ(skel->bss->add32_result, 1, "add32_result"); + + ASSERT_EQ(skel->bss->add_stack_value_copy, 3, "add_stack_value"); + ASSERT_EQ(skel->bss->add_stack_result, 1, "add_stack_result"); + + ASSERT_EQ(skel->data->add_noreturn_value, 3, "add_noreturn_value"); + +cleanup: + bpf_link__destroy(link); +} + +static void test_sub(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.sub); + if (CHECK(IS_ERR(link), "attach(sub)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.sub); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run sub", + "err %d errno %d retval %d duration %d\n", + err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->sub64_value, -1, "sub64_value"); + ASSERT_EQ(skel->bss->sub64_result, 1, "sub64_result"); + + ASSERT_EQ(skel->data->sub32_value, -1, "sub32_value"); + ASSERT_EQ(skel->bss->sub32_result, 1, "sub32_result"); + + ASSERT_EQ(skel->bss->sub_stack_value_copy, -1, "sub_stack_value"); + ASSERT_EQ(skel->bss->sub_stack_result, 1, "sub_stack_result"); + + ASSERT_EQ(skel->data->sub_noreturn_value, -1, "sub_noreturn_value"); + +cleanup: + bpf_link__destroy(link); +} + +static void test_and(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.and); + if (CHECK(IS_ERR(link), "attach(and)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.and); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run and", + "err %d errno %d retval %d duration %d\n", err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->and64_value, 0x010ull << 32, "and64_value"); + ASSERT_EQ(skel->bss->and64_result, 0x110ull << 32, "and64_result"); + + ASSERT_EQ(skel->data->and32_value, 0x010, "and32_value"); + ASSERT_EQ(skel->bss->and32_result, 0x110, "and32_result"); + + ASSERT_EQ(skel->data->and_noreturn_value, 0x010ull << 32, "and_noreturn_value"); +cleanup: + bpf_link__destroy(link); +} + +static void test_or(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.or); + if (CHECK(IS_ERR(link), "attach(or)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.or); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run or", + "err %d errno %d retval %d duration %d\n", + err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->or64_value, 0x111ull << 32, "or64_value"); + ASSERT_EQ(skel->bss->or64_result, 0x110ull << 32, "or64_result"); + + ASSERT_EQ(skel->data->or32_value, 0x111, "or32_value"); + ASSERT_EQ(skel->bss->or32_result, 0x110, "or32_result"); + + ASSERT_EQ(skel->data->or_noreturn_value, 0x111ull << 32, "or_noreturn_value"); +cleanup: + bpf_link__destroy(link); +} + +static void test_xor(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.xor); + if (CHECK(IS_ERR(link), "attach(xor)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.xor); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run xor", + "err %d errno %d retval %d duration %d\n", err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->xor64_value, 0x101ull << 32, "xor64_value"); + ASSERT_EQ(skel->bss->xor64_result, 0x110ull << 32, "xor64_result"); + + ASSERT_EQ(skel->data->xor32_value, 0x101, "xor32_value"); + ASSERT_EQ(skel->bss->xor32_result, 0x110, "xor32_result"); + + ASSERT_EQ(skel->data->xor_noreturn_value, 0x101ull << 32, "xor_nxoreturn_value"); +cleanup: + bpf_link__destroy(link); +} + +static void test_cmpxchg(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.cmpxchg); + if (CHECK(IS_ERR(link), "attach(cmpxchg)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.cmpxchg); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run add", + "err %d errno %d retval %d duration %d\n", err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->cmpxchg64_value, 2, "cmpxchg64_value"); + ASSERT_EQ(skel->bss->cmpxchg64_result_fail, 1, "cmpxchg_result_fail"); + ASSERT_EQ(skel->bss->cmpxchg64_result_succeed, 1, "cmpxchg_result_succeed"); + + ASSERT_EQ(skel->data->cmpxchg32_value, 2, "lcmpxchg32_value"); + ASSERT_EQ(skel->bss->cmpxchg32_result_fail, 1, "cmpxchg_result_fail"); + ASSERT_EQ(skel->bss->cmpxchg32_result_succeed, 1, "cmpxchg_result_succeed"); + +cleanup: + bpf_link__destroy(link); +} + +static void test_xchg(struct atomics *skel) +{ + int err, prog_fd; + __u32 duration = 0, retval; + struct bpf_link *link; + + link = bpf_program__attach(skel->progs.xchg); + if (CHECK(IS_ERR(link), "attach(xchg)", "err: %ld\n", PTR_ERR(link))) + return; + + prog_fd = bpf_program__fd(skel->progs.xchg); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + if (CHECK(err || retval, "test_run add", + "err %d errno %d retval %d duration %d\n", err, errno, retval, duration)) + goto cleanup; + + ASSERT_EQ(skel->data->xchg64_value, 2, "xchg64_value"); + ASSERT_EQ(skel->bss->xchg64_result, 1, "xchg64_result"); + + ASSERT_EQ(skel->data->xchg32_value, 2, "xchg32_value"); + ASSERT_EQ(skel->bss->xchg32_result, 1, "xchg32_result"); + +cleanup: + bpf_link__destroy(link); +} + +void test_atomics(void) +{ + struct atomics *skel; + __u32 duration = 0; + + skel = atomics__open_and_load(); + if (CHECK(!skel, "skel_load", "atomics skeleton failed\n")) + return; + + if (skel->data->skip_tests) { + printf("%s:SKIP:no ENABLE_ATOMICS_TESTS (missing Clang BPF atomics support)", + __func__); + test__skip(); + goto cleanup; + } + + if (test__start_subtest("add")) + test_add(skel); + if (test__start_subtest("sub")) + test_sub(skel); + if (test__start_subtest("and")) + test_and(skel); + if (test__start_subtest("or")) + test_or(skel); + if (test__start_subtest("xor")) + test_xor(skel); + if (test__start_subtest("cmpxchg")) + test_cmpxchg(skel); + if (test__start_subtest("xchg")) + test_xchg(skel); + +cleanup: + atomics__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/bind_perm.c b/tools/testing/selftests/bpf/prog_tests/bind_perm.c new file mode 100644 index 000000000000..d0f06e40c16d --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/bind_perm.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include "bind_perm.skel.h" + +#include <sys/types.h> +#include <sys/socket.h> +#include <sys/capability.h> + +static int duration; + +void try_bind(int family, int port, int expected_errno) +{ + struct sockaddr_storage addr = {}; + struct sockaddr_in6 *sin6; + struct sockaddr_in *sin; + int fd = -1; + + fd = socket(family, SOCK_STREAM, 0); + if (CHECK(fd < 0, "fd", "errno %d", errno)) + goto close_socket; + + if (family == AF_INET) { + sin = (struct sockaddr_in *)&addr; + sin->sin_family = family; + sin->sin_port = htons(port); + } else { + sin6 = (struct sockaddr_in6 *)&addr; + sin6->sin6_family = family; + sin6->sin6_port = htons(port); + } + + errno = 0; + bind(fd, (struct sockaddr *)&addr, sizeof(addr)); + ASSERT_EQ(errno, expected_errno, "bind"); + +close_socket: + if (fd >= 0) + close(fd); +} + +bool cap_net_bind_service(cap_flag_value_t flag) +{ + const cap_value_t cap_net_bind_service = CAP_NET_BIND_SERVICE; + cap_flag_value_t original_value; + bool was_effective = false; + cap_t caps; + + caps = cap_get_proc(); + if (CHECK(!caps, "cap_get_proc", "errno %d", errno)) + goto free_caps; + + if (CHECK(cap_get_flag(caps, CAP_NET_BIND_SERVICE, CAP_EFFECTIVE, + &original_value), + "cap_get_flag", "errno %d", errno)) + goto free_caps; + + was_effective = (original_value == CAP_SET); + + if (CHECK(cap_set_flag(caps, CAP_EFFECTIVE, 1, &cap_net_bind_service, + flag), + "cap_set_flag", "errno %d", errno)) + goto free_caps; + + if (CHECK(cap_set_proc(caps), "cap_set_proc", "errno %d", errno)) + goto free_caps; + +free_caps: + CHECK(cap_free(caps), "cap_free", "errno %d", errno); + return was_effective; +} + +void test_bind_perm(void) +{ + bool cap_was_effective; + struct bind_perm *skel; + int cgroup_fd; + + cgroup_fd = test__join_cgroup("/bind_perm"); + if (CHECK(cgroup_fd < 0, "cg-join", "errno %d", errno)) + return; + + skel = bind_perm__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel")) + goto close_cgroup_fd; + + skel->links.bind_v4_prog = bpf_program__attach_cgroup(skel->progs.bind_v4_prog, cgroup_fd); + if (!ASSERT_OK_PTR(skel, "bind_v4_prog")) + goto close_skeleton; + + skel->links.bind_v6_prog = bpf_program__attach_cgroup(skel->progs.bind_v6_prog, cgroup_fd); + if (!ASSERT_OK_PTR(skel, "bind_v6_prog")) + goto close_skeleton; + + cap_was_effective = cap_net_bind_service(CAP_CLEAR); + + try_bind(AF_INET, 110, EACCES); + try_bind(AF_INET6, 110, EACCES); + + try_bind(AF_INET, 111, 0); + try_bind(AF_INET6, 111, 0); + + if (cap_was_effective) + cap_net_bind_service(CAP_SET); + +close_skeleton: + bind_perm__destroy(skel); +close_cgroup_fd: + close(cgroup_fd); +} diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index 0e586368948d..74c45d557a2b 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -7,6 +7,7 @@ #include "bpf_iter_task.skel.h" #include "bpf_iter_task_stack.skel.h" #include "bpf_iter_task_file.skel.h" +#include "bpf_iter_task_vma.skel.h" #include "bpf_iter_task_btf.skel.h" #include "bpf_iter_tcp4.skel.h" #include "bpf_iter_tcp6.skel.h" @@ -64,6 +65,22 @@ free_link: bpf_link__destroy(link); } +static int read_fd_into_buffer(int fd, char *buf, int size) +{ + int bufleft = size; + int len; + + do { + len = read(fd, buf, bufleft); + if (len > 0) { + buf += len; + bufleft -= len; + } + } while (len > 0); + + return len < 0 ? len : size - bufleft; +} + static void test_ipv6_route(void) { struct bpf_iter_ipv6_route *skel; @@ -177,7 +194,7 @@ static int do_btf_read(struct bpf_iter_task_btf *skel) { struct bpf_program *prog = skel->progs.dump_task_struct; struct bpf_iter_task_btf__bss *bss = skel->bss; - int iter_fd = -1, len = 0, bufleft = TASKBUFSZ; + int iter_fd = -1, err; struct bpf_link *link; char *buf = taskbuf; int ret = 0; @@ -190,14 +207,7 @@ static int do_btf_read(struct bpf_iter_task_btf *skel) if (CHECK(iter_fd < 0, "create_iter", "create_iter failed\n")) goto free_link; - do { - len = read(iter_fd, buf, bufleft); - if (len > 0) { - buf += len; - bufleft -= len; - } - } while (len > 0); - + err = read_fd_into_buffer(iter_fd, buf, TASKBUFSZ); if (bss->skip) { printf("%s:SKIP:no __builtin_btf_type_id\n", __func__); ret = 1; @@ -205,7 +215,7 @@ static int do_btf_read(struct bpf_iter_task_btf *skel) goto free_link; } - if (CHECK(len < 0, "read", "read failed: %s\n", strerror(errno))) + if (CHECK(err < 0, "read", "read failed: %s\n", strerror(errno))) goto free_link; CHECK(strstr(taskbuf, "(struct task_struct)") == NULL, @@ -1133,6 +1143,92 @@ static void test_buf_neg_offset(void) bpf_iter_test_kern6__destroy(skel); } +#define CMP_BUFFER_SIZE 1024 +static char task_vma_output[CMP_BUFFER_SIZE]; +static char proc_maps_output[CMP_BUFFER_SIZE]; + +/* remove \0 and \t from str, and only keep the first line */ +static void str_strip_first_line(char *str) +{ + char *dst = str, *src = str; + + do { + if (*src == ' ' || *src == '\t') + src++; + else + *(dst++) = *(src++); + + } while (*src != '\0' && *src != '\n'); + + *dst = '\0'; +} + +#define min(a, b) ((a) < (b) ? (a) : (b)) + +static void test_task_vma(void) +{ + int err, iter_fd = -1, proc_maps_fd = -1; + struct bpf_iter_task_vma *skel; + int len, read_size = 4; + char maps_path[64]; + + skel = bpf_iter_task_vma__open(); + if (CHECK(!skel, "bpf_iter_task_vma__open", "skeleton open failed\n")) + return; + + skel->bss->pid = getpid(); + + err = bpf_iter_task_vma__load(skel); + if (CHECK(err, "bpf_iter_task_vma__load", "skeleton load failed\n")) + goto out; + + skel->links.proc_maps = bpf_program__attach_iter( + skel->progs.proc_maps, NULL); + + if (CHECK(IS_ERR(skel->links.proc_maps), "bpf_program__attach_iter", + "attach iterator failed\n")) { + skel->links.proc_maps = NULL; + goto out; + } + + iter_fd = bpf_iter_create(bpf_link__fd(skel->links.proc_maps)); + if (CHECK(iter_fd < 0, "create_iter", "create_iter failed\n")) + goto out; + + /* Read CMP_BUFFER_SIZE (1kB) from bpf_iter. Read in small chunks + * to trigger seq_file corner cases. The expected output is much + * longer than 1kB, so the while loop will terminate. + */ + len = 0; + while (len < CMP_BUFFER_SIZE) { + err = read_fd_into_buffer(iter_fd, task_vma_output + len, + min(read_size, CMP_BUFFER_SIZE - len)); + if (CHECK(err < 0, "read_iter_fd", "read_iter_fd failed\n")) + goto out; + len += err; + } + + /* read CMP_BUFFER_SIZE (1kB) from /proc/pid/maps */ + snprintf(maps_path, 64, "/proc/%u/maps", skel->bss->pid); + proc_maps_fd = open(maps_path, O_RDONLY); + if (CHECK(proc_maps_fd < 0, "open_proc_maps", "open_proc_maps failed\n")) + goto out; + err = read_fd_into_buffer(proc_maps_fd, proc_maps_output, CMP_BUFFER_SIZE); + if (CHECK(err < 0, "read_prog_maps_fd", "read_prog_maps_fd failed\n")) + goto out; + + /* strip and compare the first line of the two files */ + str_strip_first_line(task_vma_output); + str_strip_first_line(proc_maps_output); + + CHECK(strcmp(task_vma_output, proc_maps_output), "compare_output", + "found mismatch\n"); +out: + close(proc_maps_fd); + close(iter_fd); + bpf_iter_task_vma__destroy(skel); +} + void test_bpf_iter(void) { if (test__start_subtest("btf_id_or_null")) @@ -1149,6 +1245,8 @@ void test_bpf_iter(void) test_task_stack(); if (test__start_subtest("task_file")) test_task_file(); + if (test__start_subtest("task_vma")) + test_task_vma(); if (test__start_subtest("task_btf")) test_task_btf(); if (test__start_subtest("tcp4")) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c index 9a8f47fc0b91..37c5494a0381 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c @@ -2,6 +2,7 @@ /* Copyright (c) 2019 Facebook */ #include <linux/err.h> +#include <netinet/tcp.h> #include <test_progs.h> #include "bpf_dctcp.skel.h" #include "bpf_cubic.skel.h" diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c index 8ae97e2a4b9d..6a7ee7420701 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf.c +++ b/tools/testing/selftests/bpf/prog_tests/btf.c @@ -914,7 +914,7 @@ static struct btf_raw_test raw_tests[] = { .err_str = "Member exceeds struct_size", }, -/* Test member exeeds the size of struct +/* Test member exceeds the size of struct * * struct A { * int m; @@ -948,7 +948,7 @@ static struct btf_raw_test raw_tests[] = { .err_str = "Member exceeds struct_size", }, -/* Test member exeeds the size of struct +/* Test member exceeds the size of struct * * struct A { * int m; @@ -3509,6 +3509,27 @@ static struct btf_raw_test raw_tests[] = { .value_type_id = 3 /* arr_t */, .max_entries = 4, }, +/* + * elf .rodata section size 4 and btf .rodata section vlen 0. + */ +{ + .descr = "datasec: vlen == 0", + .raw_types = { + /* int */ + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + /* .rodata section */ + BTF_TYPE_ENC(NAME_NTH(1), BTF_INFO_ENC(BTF_KIND_DATASEC, 0, 0), 4), + /* [2] */ + BTF_END_RAW, + }, + BTF_STR_SEC("\0.rodata"), + .map_type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 1, +}, }; /* struct btf_raw_test raw_tests[] */ diff --git a/tools/testing/selftests/bpf/prog_tests/btf_map_in_map.c b/tools/testing/selftests/bpf/prog_tests/btf_map_in_map.c index 76ebe4c250f1..eb90a6b8850d 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf_map_in_map.c +++ b/tools/testing/selftests/bpf/prog_tests/btf_map_in_map.c @@ -20,39 +20,6 @@ static __u32 bpf_map_id(struct bpf_map *map) return info.id; } -/* - * Trigger synchronize_rcu() in kernel. - * - * ARRAY_OF_MAPS/HASH_OF_MAPS lookup/update operations trigger synchronize_rcu() - * if looking up an existing non-NULL element or updating the map with a valid - * inner map FD. Use this fact to trigger synchronize_rcu(): create map-in-map, - * create a trivial ARRAY map, update map-in-map with ARRAY inner map. Then - * cleanup. At the end, at least one synchronize_rcu() would be called. - */ -static int kern_sync_rcu(void) -{ - int inner_map_fd, outer_map_fd, err, zero = 0; - - inner_map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, 4, 4, 1, 0); - if (CHECK(inner_map_fd < 0, "inner_map_create", "failed %d\n", -errno)) - return -1; - - outer_map_fd = bpf_create_map_in_map(BPF_MAP_TYPE_ARRAY_OF_MAPS, NULL, - sizeof(int), inner_map_fd, 1, 0); - if (CHECK(outer_map_fd < 0, "outer_map_create", "failed %d\n", -errno)) { - close(inner_map_fd); - return -1; - } - - err = bpf_map_update_elem(outer_map_fd, &zero, &inner_map_fd, 0); - if (err) - err = -errno; - CHECK(err, "outer_map_update", "failed %d\n", err); - close(inner_map_fd); - close(outer_map_fd); - return err; -} - static void test_lookup_update(void) { int map1_fd, map2_fd, map3_fd, map4_fd, map5_fd, map1_id, map2_id; diff --git a/tools/testing/selftests/bpf/prog_tests/cgroup_attach_multi.c b/tools/testing/selftests/bpf/prog_tests/cgroup_attach_multi.c index b549fcfacc0b..0a1fc9816cef 100644 --- a/tools/testing/selftests/bpf/prog_tests/cgroup_attach_multi.c +++ b/tools/testing/selftests/bpf/prog_tests/cgroup_attach_multi.c @@ -45,13 +45,13 @@ static int prog_load_cnt(int verdict, int val) BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem), BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2), BPF_MOV64_IMM(BPF_REG_1, val), /* r1 = 1 */ - BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_0, BPF_REG_1, 0, 0), /* xadd r0 += r1 */ + BPF_ATOMIC_OP(BPF_DW, BPF_ADD, BPF_REG_0, BPF_REG_1, 0), BPF_LD_MAP_FD(BPF_REG_1, cgroup_storage_fd), BPF_MOV64_IMM(BPF_REG_2, 0), BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_local_storage), BPF_MOV64_IMM(BPF_REG_1, val), - BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_W, BPF_REG_0, BPF_REG_1, 0, 0), + BPF_ATOMIC_OP(BPF_W, BPF_ADD, BPF_REG_0, BPF_REG_1, 0), BPF_LD_MAP_FD(BPF_REG_1, percpu_cgroup_storage_fd), BPF_MOV64_IMM(BPF_REG_2, 0), diff --git a/tools/testing/selftests/bpf/prog_tests/check_mtu.c b/tools/testing/selftests/bpf/prog_tests/check_mtu.c new file mode 100644 index 000000000000..36af1c138faf --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/check_mtu.c @@ -0,0 +1,216 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Jesper Dangaard Brouer */ + +#include <linux/if_link.h> /* before test_progs.h, avoid bpf_util.h redefines */ +#include <test_progs.h> +#include "test_check_mtu.skel.h" +#include "network_helpers.h" + +#include <stdlib.h> +#include <inttypes.h> + +#define IFINDEX_LO 1 + +static __u32 duration; /* Hint: needed for CHECK macro */ + +static int read_mtu_device_lo(void) +{ + const char *filename = "/sys/class/net/lo/mtu"; + char buf[11] = {}; + int value, n, fd; + + fd = open(filename, 0, O_RDONLY); + if (fd == -1) + return -1; + + n = read(fd, buf, sizeof(buf)); + close(fd); + + if (n == -1) + return -2; + + value = strtoimax(buf, NULL, 10); + if (errno == ERANGE) + return -3; + + return value; +} + +static void test_check_mtu_xdp_attach(void) +{ + struct bpf_link_info link_info; + __u32 link_info_len = sizeof(link_info); + struct test_check_mtu *skel; + struct bpf_program *prog; + struct bpf_link *link; + int err = 0; + int fd; + + skel = test_check_mtu__open_and_load(); + if (CHECK(!skel, "open and load skel", "failed")) + return; /* Exit if e.g. helper unknown to kernel */ + + prog = skel->progs.xdp_use_helper_basic; + + link = bpf_program__attach_xdp(prog, IFINDEX_LO); + if (CHECK(IS_ERR(link), "link_attach", "failed: %ld\n", PTR_ERR(link))) + goto out; + skel->links.xdp_use_helper_basic = link; + + memset(&link_info, 0, sizeof(link_info)); + fd = bpf_link__fd(link); + err = bpf_obj_get_info_by_fd(fd, &link_info, &link_info_len); + if (CHECK(err, "link_info", "failed: %d\n", err)) + goto out; + + CHECK(link_info.type != BPF_LINK_TYPE_XDP, "link_type", + "got %u != exp %u\n", link_info.type, BPF_LINK_TYPE_XDP); + CHECK(link_info.xdp.ifindex != IFINDEX_LO, "link_ifindex", + "got %u != exp %u\n", link_info.xdp.ifindex, IFINDEX_LO); + + err = bpf_link__detach(link); + CHECK(err, "link_detach", "failed %d\n", err); + +out: + test_check_mtu__destroy(skel); +} + +static void test_check_mtu_run_xdp(struct test_check_mtu *skel, + struct bpf_program *prog, + __u32 mtu_expect) +{ + const char *prog_name = bpf_program__name(prog); + int retval_expect = XDP_PASS; + __u32 mtu_result = 0; + char buf[256] = {}; + int err; + struct bpf_prog_test_run_attr tattr = { + .repeat = 1, + .data_in = &pkt_v4, + .data_size_in = sizeof(pkt_v4), + .data_out = buf, + .data_size_out = sizeof(buf), + .prog_fd = bpf_program__fd(prog), + }; + + err = bpf_prog_test_run_xattr(&tattr); + CHECK_ATTR(err != 0, "bpf_prog_test_run", + "prog_name:%s (err %d errno %d retval %d)\n", + prog_name, err, errno, tattr.retval); + + CHECK(tattr.retval != retval_expect, "retval", + "progname:%s unexpected retval=%d expected=%d\n", + prog_name, tattr.retval, retval_expect); + + /* Extract MTU that BPF-prog got */ + mtu_result = skel->bss->global_bpf_mtu_xdp; + ASSERT_EQ(mtu_result, mtu_expect, "MTU-compare-user"); +} + + +static void test_check_mtu_xdp(__u32 mtu, __u32 ifindex) +{ + struct test_check_mtu *skel; + int err; + + skel = test_check_mtu__open(); + if (CHECK(!skel, "skel_open", "failed")) + return; + + /* Update "constants" in BPF-prog *BEFORE* libbpf load */ + skel->rodata->GLOBAL_USER_MTU = mtu; + skel->rodata->GLOBAL_USER_IFINDEX = ifindex; + + err = test_check_mtu__load(skel); + if (CHECK(err, "skel_load", "failed: %d\n", err)) + goto cleanup; + + test_check_mtu_run_xdp(skel, skel->progs.xdp_use_helper, mtu); + test_check_mtu_run_xdp(skel, skel->progs.xdp_exceed_mtu, mtu); + test_check_mtu_run_xdp(skel, skel->progs.xdp_minus_delta, mtu); + +cleanup: + test_check_mtu__destroy(skel); +} + +static void test_check_mtu_run_tc(struct test_check_mtu *skel, + struct bpf_program *prog, + __u32 mtu_expect) +{ + const char *prog_name = bpf_program__name(prog); + int retval_expect = BPF_OK; + __u32 mtu_result = 0; + char buf[256] = {}; + int err; + struct bpf_prog_test_run_attr tattr = { + .repeat = 1, + .data_in = &pkt_v4, + .data_size_in = sizeof(pkt_v4), + .data_out = buf, + .data_size_out = sizeof(buf), + .prog_fd = bpf_program__fd(prog), + }; + + err = bpf_prog_test_run_xattr(&tattr); + CHECK_ATTR(err != 0, "bpf_prog_test_run", + "prog_name:%s (err %d errno %d retval %d)\n", + prog_name, err, errno, tattr.retval); + + CHECK(tattr.retval != retval_expect, "retval", + "progname:%s unexpected retval=%d expected=%d\n", + prog_name, tattr.retval, retval_expect); + + /* Extract MTU that BPF-prog got */ + mtu_result = skel->bss->global_bpf_mtu_tc; + ASSERT_EQ(mtu_result, mtu_expect, "MTU-compare-user"); +} + + +static void test_check_mtu_tc(__u32 mtu, __u32 ifindex) +{ + struct test_check_mtu *skel; + int err; + + skel = test_check_mtu__open(); + if (CHECK(!skel, "skel_open", "failed")) + return; + + /* Update "constants" in BPF-prog *BEFORE* libbpf load */ + skel->rodata->GLOBAL_USER_MTU = mtu; + skel->rodata->GLOBAL_USER_IFINDEX = ifindex; + + err = test_check_mtu__load(skel); + if (CHECK(err, "skel_load", "failed: %d\n", err)) + goto cleanup; + + test_check_mtu_run_tc(skel, skel->progs.tc_use_helper, mtu); + test_check_mtu_run_tc(skel, skel->progs.tc_exceed_mtu, mtu); + test_check_mtu_run_tc(skel, skel->progs.tc_exceed_mtu_da, mtu); + test_check_mtu_run_tc(skel, skel->progs.tc_minus_delta, mtu); +cleanup: + test_check_mtu__destroy(skel); +} + +void test_check_mtu(void) +{ + __u32 mtu_lo; + + if (test__start_subtest("bpf_check_mtu XDP-attach")) + test_check_mtu_xdp_attach(); + + mtu_lo = read_mtu_device_lo(); + if (CHECK(mtu_lo < 0, "reading MTU value", "failed (err:%d)", mtu_lo)) + return; + + if (test__start_subtest("bpf_check_mtu XDP-run")) + test_check_mtu_xdp(mtu_lo, 0); + + if (test__start_subtest("bpf_check_mtu XDP-run ifindex-lookup")) + test_check_mtu_xdp(mtu_lo, IFINDEX_LO); + + if (test__start_subtest("bpf_check_mtu TC-run")) + test_check_mtu_tc(mtu_lo, 0); + + if (test__start_subtest("bpf_check_mtu TC-run ifindex-lookup")) + test_check_mtu_tc(mtu_lo, IFINDEX_LO); +} diff --git a/tools/testing/selftests/bpf/prog_tests/cls_redirect.c b/tools/testing/selftests/bpf/prog_tests/cls_redirect.c index 9781d85cb223..e075d03ab630 100644 --- a/tools/testing/selftests/bpf/prog_tests/cls_redirect.c +++ b/tools/testing/selftests/bpf/prog_tests/cls_redirect.c @@ -7,6 +7,7 @@ #include <string.h> #include <linux/pkt_cls.h> +#include <netinet/tcp.h> #include <test_progs.h> diff --git a/tools/testing/selftests/bpf/prog_tests/core_read_macros.c b/tools/testing/selftests/bpf/prog_tests/core_read_macros.c new file mode 100644 index 000000000000..96f5cf3c6fa2 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/core_read_macros.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ + +#include <test_progs.h> + +struct callback_head { + struct callback_head *next; + void (*func)(struct callback_head *head); +}; + +/* ___shuffled flavor is just an illusion for BPF code, it doesn't really + * exist and user-space needs to provide data in the memory layout that + * matches callback_head. We just defined ___shuffled flavor to make it easier + * to work with the skeleton + */ +struct callback_head___shuffled { + struct callback_head___shuffled *next; + void (*func)(struct callback_head *head); +}; + +#include "test_core_read_macros.skel.h" + +void test_core_read_macros(void) +{ + int duration = 0, err; + struct test_core_read_macros* skel; + struct test_core_read_macros__bss *bss; + struct callback_head u_probe_in; + struct callback_head___shuffled u_core_in; + + skel = test_core_read_macros__open_and_load(); + if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) + return; + bss = skel->bss; + bss->my_pid = getpid(); + + /* next pointers have to be set from the kernel side */ + bss->k_probe_in.func = (void *)(long)0x1234; + bss->k_core_in.func = (void *)(long)0xabcd; + + u_probe_in.next = &u_probe_in; + u_probe_in.func = (void *)(long)0x5678; + bss->u_probe_in = &u_probe_in; + + u_core_in.next = &u_core_in; + u_core_in.func = (void *)(long)0xdbca; + bss->u_core_in = &u_core_in; + + err = test_core_read_macros__attach(skel); + if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) + goto cleanup; + + /* trigger tracepoint */ + usleep(1); + + ASSERT_EQ(bss->k_probe_out, 0x1234, "k_probe_out"); + ASSERT_EQ(bss->k_core_out, 0xabcd, "k_core_out"); + + ASSERT_EQ(bss->u_probe_out, 0x5678, "u_probe_out"); + ASSERT_EQ(bss->u_core_out, 0xdbca, "u_core_out"); + +cleanup: + test_core_read_macros__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_stress.c b/tools/testing/selftests/bpf/prog_tests/fexit_stress.c index 3b9dbf7433f0..7c9b62e971f1 100644 --- a/tools/testing/selftests/bpf/prog_tests/fexit_stress.c +++ b/tools/testing/selftests/bpf/prog_tests/fexit_stress.c @@ -2,8 +2,8 @@ /* Copyright (c) 2019 Facebook */ #include <test_progs.h> -/* x86-64 fits 55 JITed and 43 interpreted progs into half page */ -#define CNT 40 +/* that's kernel internal BPF_MAX_TRAMP_PROGS define */ +#define CNT 38 void test_fexit_stress(void) { diff --git a/tools/testing/selftests/bpf/prog_tests/global_func_args.c b/tools/testing/selftests/bpf/prog_tests/global_func_args.c new file mode 100644 index 000000000000..8bcc2869102f --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/global_func_args.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "test_progs.h" +#include "network_helpers.h" + +static __u32 duration; + +static void test_global_func_args0(struct bpf_object *obj) +{ + int err, i, map_fd, actual_value; + const char *map_name = "values"; + + map_fd = bpf_find_map(__func__, obj, map_name); + if (CHECK(map_fd < 0, "bpf_find_map", "cannot find BPF map %s: %s\n", + map_name, strerror(errno))) + return; + + struct { + const char *descr; + int expected_value; + } tests[] = { + {"passing NULL pointer", 0}, + {"returning value", 1}, + {"reading local variable", 100 }, + {"writing local variable", 101 }, + {"reading global variable", 42 }, + {"writing global variable", 43 }, + {"writing to pointer-to-pointer", 1 }, + }; + + for (i = 0; i < ARRAY_SIZE(tests); ++i) { + const int expected_value = tests[i].expected_value; + + err = bpf_map_lookup_elem(map_fd, &i, &actual_value); + + CHECK(err || actual_value != expected_value, tests[i].descr, + "err %d result %d expected %d\n", err, actual_value, expected_value); + } +} + +void test_global_func_args(void) +{ + const char *file = "./test_global_func_args.o"; + __u32 retval; + struct bpf_object *obj; + int err, prog_fd; + + err = bpf_prog_load(file, BPF_PROG_TYPE_CGROUP_SKB, &obj, &prog_fd); + if (CHECK(err, "load program", "error %d loading %s\n", err, file)) + return; + + err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4), + NULL, NULL, &retval, &duration); + CHECK(err || retval, "pass global func args run", + "err %d errno %d retval %d duration %d\n", + err, errno, retval, duration); + + test_global_func_args0(obj); + + bpf_object__close(obj); +} diff --git a/tools/testing/selftests/bpf/prog_tests/ksyms_module.c b/tools/testing/selftests/bpf/prog_tests/ksyms_module.c new file mode 100644 index 000000000000..4c232b456479 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/ksyms_module.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include <test_progs.h> +#include <bpf/libbpf.h> +#include <bpf/btf.h> +#include "test_ksyms_module.skel.h" + +static int duration; + +void test_ksyms_module(void) +{ + struct test_ksyms_module* skel; + int err; + + skel = test_ksyms_module__open_and_load(); + if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) + return; + + err = test_ksyms_module__attach(skel); + if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) + goto cleanup; + + usleep(1); + + ASSERT_EQ(skel->bss->triggered, true, "triggered"); + ASSERT_EQ(skel->bss->out_mod_ksym_global, 123, "global_ksym_val"); + +cleanup: + test_ksyms_module__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/module_attach.c b/tools/testing/selftests/bpf/prog_tests/module_attach.c index 50796b651f72..5bc53d53d86e 100644 --- a/tools/testing/selftests/bpf/prog_tests/module_attach.c +++ b/tools/testing/selftests/bpf/prog_tests/module_attach.c @@ -21,9 +21,34 @@ static int trigger_module_test_read(int read_sz) return 0; } +static int trigger_module_test_write(int write_sz) +{ + int fd, err; + char *buf = malloc(write_sz); + + if (!buf) + return -ENOMEM; + + memset(buf, 'a', write_sz); + buf[write_sz-1] = '\0'; + + fd = open("/sys/kernel/bpf_testmod", O_WRONLY); + err = -errno; + if (CHECK(fd < 0, "testmod_file_open", "failed: %d\n", err)) { + free(buf); + return err; + } + + write(fd, buf, write_sz); + close(fd); + free(buf); + return 0; +} + void test_module_attach(void) { const int READ_SZ = 456; + const int WRITE_SZ = 457; struct test_module_attach* skel; struct test_module_attach__bss *bss; int err; @@ -48,8 +73,10 @@ void test_module_attach(void) /* trigger tracepoint */ ASSERT_OK(trigger_module_test_read(READ_SZ), "trigger_read"); + ASSERT_OK(trigger_module_test_write(WRITE_SZ), "trigger_write"); ASSERT_EQ(bss->raw_tp_read_sz, READ_SZ, "raw_tp"); + ASSERT_EQ(bss->raw_tp_bare_write_sz, WRITE_SZ, "raw_tp_bare"); ASSERT_EQ(bss->tp_btf_read_sz, READ_SZ, "tp_btf"); ASSERT_EQ(bss->fentry_read_sz, READ_SZ, "fentry"); ASSERT_EQ(bss->fentry_manual_read_sz, READ_SZ, "fentry_manual"); diff --git a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c index e74dc501b27f..31a3114906e2 100644 --- a/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c +++ b/tools/testing/selftests/bpf/prog_tests/ns_current_pid_tgid.c @@ -1,85 +1,87 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2020 Carlos Neira cneirabustos@gmail.com */ + +#define _GNU_SOURCE #include <test_progs.h> +#include "test_ns_current_pid_tgid.skel.h" #include <sys/stat.h> #include <sys/types.h> #include <unistd.h> #include <sys/syscall.h> +#include <sched.h> +#include <sys/wait.h> +#include <sys/mount.h> +#include <sys/fcntl.h> -struct bss { - __u64 dev; - __u64 ino; - __u64 pid_tgid; - __u64 user_pid_tgid; -}; +#define STACK_SIZE (1024 * 1024) +static char child_stack[STACK_SIZE]; -void test_ns_current_pid_tgid(void) +static int test_current_pid_tgid(void *args) { - const char *probe_name = "raw_tracepoint/sys_enter"; - const char *file = "test_ns_current_pid_tgid.o"; - int err, key = 0, duration = 0; - struct bpf_link *link = NULL; - struct bpf_program *prog; - struct bpf_map *bss_map; - struct bpf_object *obj; - struct bss bss; + struct test_ns_current_pid_tgid__bss *bss; + struct test_ns_current_pid_tgid *skel; + int err = -1, duration = 0; + pid_t tgid, pid; struct stat st; - __u64 id; - - obj = bpf_object__open_file(file, NULL); - if (CHECK(IS_ERR(obj), "obj_open", "err %ld\n", PTR_ERR(obj))) - return; - err = bpf_object__load(obj); - if (CHECK(err, "obj_load", "err %d errno %d\n", err, errno)) + skel = test_ns_current_pid_tgid__open_and_load(); + if (CHECK(!skel, "skel_open_load", "failed to load skeleton\n")) goto cleanup; - bss_map = bpf_object__find_map_by_name(obj, "test_ns_.bss"); - if (CHECK(!bss_map, "find_bss_map", "failed\n")) + pid = syscall(SYS_gettid); + tgid = getpid(); + + err = stat("/proc/self/ns/pid", &st); + if (CHECK(err, "stat", "failed /proc/self/ns/pid: %d\n", err)) goto cleanup; - prog = bpf_object__find_program_by_title(obj, probe_name); - if (CHECK(!prog, "find_prog", "prog '%s' not found\n", - probe_name)) + bss = skel->bss; + bss->dev = st.st_dev; + bss->ino = st.st_ino; + bss->user_pid = 0; + bss->user_tgid = 0; + + err = test_ns_current_pid_tgid__attach(skel); + if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err)) goto cleanup; - memset(&bss, 0, sizeof(bss)); - pid_t tid = syscall(SYS_gettid); - pid_t pid = getpid(); + /* trigger tracepoint */ + usleep(1); + ASSERT_EQ(bss->user_pid, pid, "pid"); + ASSERT_EQ(bss->user_tgid, tgid, "tgid"); + err = 0; - id = (__u64) tid << 32 | pid; - bss.user_pid_tgid = id; +cleanup: + test_ns_current_pid_tgid__destroy(skel); - if (CHECK_FAIL(stat("/proc/self/ns/pid", &st))) { - perror("Failed to stat /proc/self/ns/pid"); - goto cleanup; - } + return err; +} - bss.dev = st.st_dev; - bss.ino = st.st_ino; +static void test_ns_current_pid_tgid_new_ns(void) +{ + int wstatus, duration = 0; + pid_t cpid; - err = bpf_map_update_elem(bpf_map__fd(bss_map), &key, &bss, 0); - if (CHECK(err, "setting_bss", "failed to set bss : %d\n", err)) - goto cleanup; + /* Create a process in a new namespace, this process + * will be the init process of this new namespace hence will be pid 1. + */ + cpid = clone(test_current_pid_tgid, child_stack + STACK_SIZE, + CLONE_NEWPID | SIGCHLD, NULL); - link = bpf_program__attach_raw_tracepoint(prog, "sys_enter"); - if (CHECK(IS_ERR(link), "attach_raw_tp", "err %ld\n", - PTR_ERR(link))) { - link = NULL; - goto cleanup; - } + if (CHECK(cpid == -1, "clone", strerror(errno))) + return; - /* trigger some syscalls */ - usleep(1); + if (CHECK(waitpid(cpid, &wstatus, 0) == -1, "waitpid", strerror(errno))) + return; - err = bpf_map_lookup_elem(bpf_map__fd(bss_map), &key, &bss); - if (CHECK(err, "set_bss", "failed to get bss : %d\n", err)) - goto cleanup; + if (CHECK(WEXITSTATUS(wstatus) != 0, "newns_pidtgid", "failed")) + return; +} - if (CHECK(id != bss.pid_tgid, "Compare user pid/tgid vs. bpf pid/tgid", - "User pid/tgid %llu BPF pid/tgid %llu\n", id, bss.pid_tgid)) - goto cleanup; -cleanup: - bpf_link__destroy(link); - bpf_object__close(obj); +void test_ns_current_pid_tgid(void) +{ + if (test__start_subtest("ns_current_pid_tgid_root_ns")) + test_current_pid_tgid(NULL); + if (test__start_subtest("ns_current_pid_tgid_new_ns")) + test_ns_current_pid_tgid_new_ns(); } diff --git a/tools/testing/selftests/bpf/prog_tests/recursion.c b/tools/testing/selftests/bpf/prog_tests/recursion.c new file mode 100644 index 000000000000..0e378d63fe18 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/recursion.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ +#include <test_progs.h> +#include "recursion.skel.h" + +void test_recursion(void) +{ + struct bpf_prog_info prog_info = {}; + __u32 prog_info_len = sizeof(prog_info); + struct recursion *skel; + int key = 0; + int err; + + skel = recursion__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open_and_load")) + return; + + err = recursion__attach(skel); + if (!ASSERT_OK(err, "skel_attach")) + goto out; + + ASSERT_EQ(skel->bss->pass1, 0, "pass1 == 0"); + bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash1), &key, 0); + ASSERT_EQ(skel->bss->pass1, 1, "pass1 == 1"); + bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash1), &key, 0); + ASSERT_EQ(skel->bss->pass1, 2, "pass1 == 2"); + + ASSERT_EQ(skel->bss->pass2, 0, "pass2 == 0"); + bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash2), &key, 0); + ASSERT_EQ(skel->bss->pass2, 1, "pass2 == 1"); + bpf_map_lookup_elem(bpf_map__fd(skel->maps.hash2), &key, 0); + ASSERT_EQ(skel->bss->pass2, 2, "pass2 == 2"); + + err = bpf_obj_get_info_by_fd(bpf_program__fd(skel->progs.on_lookup), + &prog_info, &prog_info_len); + if (!ASSERT_OK(err, "get_prog_info")) + goto out; + ASSERT_EQ(prog_info.recursion_misses, 2, "recursion_misses"); +out: + recursion__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/socket_cookie.c b/tools/testing/selftests/bpf/prog_tests/socket_cookie.c new file mode 100644 index 000000000000..232db28dde18 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/socket_cookie.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2020 Google LLC. +// Copyright (c) 2018 Facebook + +#include <test_progs.h> +#include "socket_cookie_prog.skel.h" +#include "network_helpers.h" + +static int duration; + +struct socket_cookie { + __u64 cookie_key; + __u32 cookie_value; +}; + +void test_socket_cookie(void) +{ + int server_fd = 0, client_fd = 0, cgroup_fd = 0, err = 0; + socklen_t addr_len = sizeof(struct sockaddr_in6); + struct socket_cookie_prog *skel; + __u32 cookie_expected_value; + struct sockaddr_in6 addr; + struct socket_cookie val; + + skel = socket_cookie_prog__open_and_load(); + if (!ASSERT_OK_PTR(skel, "skel_open")) + return; + + cgroup_fd = test__join_cgroup("/socket_cookie"); + if (CHECK(cgroup_fd < 0, "join_cgroup", "cgroup creation failed\n")) + goto out; + + skel->links.set_cookie = bpf_program__attach_cgroup( + skel->progs.set_cookie, cgroup_fd); + if (!ASSERT_OK_PTR(skel->links.set_cookie, "prog_attach")) + goto close_cgroup_fd; + + skel->links.update_cookie_sockops = bpf_program__attach_cgroup( + skel->progs.update_cookie_sockops, cgroup_fd); + if (!ASSERT_OK_PTR(skel->links.update_cookie_sockops, "prog_attach")) + goto close_cgroup_fd; + + skel->links.update_cookie_tracing = bpf_program__attach( + skel->progs.update_cookie_tracing); + if (!ASSERT_OK_PTR(skel->links.update_cookie_tracing, "prog_attach")) + goto close_cgroup_fd; + + server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0); + if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno)) + goto close_cgroup_fd; + + client_fd = connect_to_fd(server_fd, 0); + if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno)) + goto close_server_fd; + + err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.socket_cookies), + &client_fd, &val); + if (!ASSERT_OK(err, "map_lookup(socket_cookies)")) + goto close_client_fd; + + err = getsockname(client_fd, (struct sockaddr *)&addr, &addr_len); + if (!ASSERT_OK(err, "getsockname")) + goto close_client_fd; + + cookie_expected_value = (ntohs(addr.sin6_port) << 8) | 0xFF; + ASSERT_EQ(val.cookie_value, cookie_expected_value, "cookie_value"); + +close_client_fd: + close(client_fd); +close_server_fd: + close(server_fd); +close_cgroup_fd: + close(cgroup_fd); +out: + socket_cookie_prog__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c index 85f73261fab0..b8b48cac2ac3 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2020 Cloudflare #include <error.h> +#include <netinet/tcp.h> #include "test_progs.h" #include "test_skmsg_load_helpers.skel.h" diff --git a/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c b/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c index b25c9c45c148..d5b44b135c00 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c +++ b/tools/testing/selftests/bpf/prog_tests/sockopt_sk.c @@ -2,6 +2,12 @@ #include <test_progs.h> #include "cgroup_helpers.h" +#include <linux/tcp.h> + +#ifndef SOL_TCP +#define SOL_TCP IPPROTO_TCP +#endif + #define SOL_CUSTOM 0xdeadbeef static int getsetsockopt(void) @@ -11,6 +17,7 @@ static int getsetsockopt(void) char u8[4]; __u32 u32; char cc[16]; /* TCP_CA_NAME_MAX */ + struct tcp_zerocopy_receive zc; } buf = {}; socklen_t optlen; char *big_buf = NULL; @@ -154,6 +161,27 @@ static int getsetsockopt(void) goto err; } + /* TCP_ZEROCOPY_RECEIVE triggers */ + memset(&buf, 0, sizeof(buf)); + optlen = sizeof(buf.zc); + err = getsockopt(fd, SOL_TCP, TCP_ZEROCOPY_RECEIVE, &buf, &optlen); + if (err) { + log_err("Unexpected getsockopt(TCP_ZEROCOPY_RECEIVE) err=%d errno=%d", + err, errno); + goto err; + } + + memset(&buf, 0, sizeof(buf)); + buf.zc.address = 12345; /* rejected by BPF */ + optlen = sizeof(buf.zc); + errno = 0; + err = getsockopt(fd, SOL_TCP, TCP_ZEROCOPY_RECEIVE, &buf, &optlen); + if (errno != EPERM) { + log_err("Unexpected getsockopt(TCP_ZEROCOPY_RECEIVE) err=%d errno=%d", + err, errno); + goto err; + } + free(big_buf); close(fd); return 0; diff --git a/tools/testing/selftests/bpf/prog_tests/stack_var_off.c b/tools/testing/selftests/bpf/prog_tests/stack_var_off.c new file mode 100644 index 000000000000..2ce9deefa59c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/stack_var_off.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <test_progs.h> +#include "test_stack_var_off.skel.h" + +/* Test read and writes to the stack performed with offsets that are not + * statically known. + */ +void test_stack_var_off(void) +{ + int duration = 0; + struct test_stack_var_off *skel; + + skel = test_stack_var_off__open_and_load(); + if (CHECK(!skel, "skel_open", "failed to open skeleton\n")) + return; + + /* Give pid to bpf prog so it doesn't trigger for anyone else. */ + skel->bss->test_pid = getpid(); + /* Initialize the probe's input. */ + skel->bss->input[0] = 2; + skel->bss->input[1] = 42; /* This will be returned in probe_res. */ + + if (!ASSERT_OK(test_stack_var_off__attach(skel), "skel_attach")) + goto cleanup; + + /* Trigger probe. */ + usleep(1); + + if (CHECK(skel->bss->probe_res != 42, "check_probe_res", + "wrong probe res: %d\n", skel->bss->probe_res)) + goto cleanup; + +cleanup: + test_stack_var_off__destroy(skel); +} diff --git a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c index 32e4348b714b..7e13129f593a 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c +++ b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c @@ -61,6 +61,14 @@ void test_test_global_funcs(void) { "test_global_func6.o" , "modified ctx ptr R2" }, { "test_global_func7.o" , "foo() doesn't return scalar" }, { "test_global_func8.o" }, + { "test_global_func9.o" }, + { "test_global_func10.o", "invalid indirect read from stack" }, + { "test_global_func11.o", "Caller passes invalid args into func#1" }, + { "test_global_func12.o", "invalid mem access 'mem_or_null'" }, + { "test_global_func13.o", "Caller passes invalid args into func#1" }, + { "test_global_func14.o", "reference type('FWD S') size cannot be determined" }, + { "test_global_func15.o", "At program exit the register R0 has value" }, + { "test_global_func16.o", "invalid indirect read from stack" }, }; libbpf_print_fn_t old_print_fn = NULL; int err, i, duration = 0; diff --git a/tools/testing/selftests/bpf/prog_tests/test_ima.c b/tools/testing/selftests/bpf/prog_tests/test_ima.c index 61fca681d524..b54bc0c351b7 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_ima.c +++ b/tools/testing/selftests/bpf/prog_tests/test_ima.c @@ -9,6 +9,7 @@ #include <unistd.h> #include <sys/wait.h> #include <test_progs.h> +#include <linux/ring_buffer.h> #include "ima.skel.h" @@ -31,9 +32,18 @@ static int run_measured_process(const char *measured_dir, u32 *monitored_pid) return -EINVAL; } +static u64 ima_hash_from_bpf; + +static int process_sample(void *ctx, void *data, size_t len) +{ + ima_hash_from_bpf = *((u64 *)data); + return 0; +} + void test_test_ima(void) { char measured_dir_template[] = "/tmp/ima_measuredXXXXXX"; + struct ring_buffer *ringbuf; const char *measured_dir; char cmd[256]; @@ -44,6 +54,11 @@ void test_test_ima(void) if (CHECK(!skel, "skel_load", "skeleton failed\n")) goto close_prog; + ringbuf = ring_buffer__new(bpf_map__fd(skel->maps.ringbuf), + process_sample, NULL, NULL); + if (!ASSERT_OK_PTR(ringbuf, "ringbuf")) + goto close_prog; + err = ima__attach(skel); if (CHECK(err, "attach", "attach failed: %d\n", err)) goto close_prog; @@ -60,11 +75,9 @@ void test_test_ima(void) if (CHECK(err, "run_measured_process", "err = %d\n", err)) goto close_clean; - CHECK(skel->data->ima_hash_ret < 0, "ima_hash_ret", - "ima_hash_ret = %ld\n", skel->data->ima_hash_ret); - - CHECK(skel->bss->ima_hash == 0, "ima_hash", - "ima_hash = %lu\n", skel->bss->ima_hash); + err = ring_buffer__consume(ringbuf); + ASSERT_EQ(err, 1, "num_samples_or_err"); + ASSERT_NEQ(ima_hash_from_bpf, 0, "ima_hash"); close_clean: snprintf(cmd, sizeof(cmd), "./ima_setup.sh cleanup %s", measured_dir); diff --git a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c index 3bfcf00c0a67..d2c16eaae367 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_local_storage.c +++ b/tools/testing/selftests/bpf/prog_tests/test_local_storage.c @@ -113,7 +113,7 @@ static bool check_syscall_operations(int map_fd, int obj_fd) void test_test_local_storage(void) { - char tmp_dir_path[64] = "/tmp/local_storageXXXXXX"; + char tmp_dir_path[] = "/tmp/local_storageXXXXXX"; int err, serv_sk = -1, task_fd = -1, rm_fd = -1; struct local_storage *skel = NULL; char tmp_exec_path[64]; diff --git a/tools/testing/selftests/bpf/prog_tests/test_lsm.c b/tools/testing/selftests/bpf/prog_tests/test_lsm.c index 6ab29226c99b..2755e4f81499 100644 --- a/tools/testing/selftests/bpf/prog_tests/test_lsm.c +++ b/tools/testing/selftests/bpf/prog_tests/test_lsm.c @@ -10,7 +10,6 @@ #include <unistd.h> #include <malloc.h> #include <stdlib.h> -#include <unistd.h> #include "lsm.skel.h" diff --git a/tools/testing/selftests/bpf/prog_tests/trampoline_count.c b/tools/testing/selftests/bpf/prog_tests/trampoline_count.c index 781c8d11604b..f3022d934e2d 100644 --- a/tools/testing/selftests/bpf/prog_tests/trampoline_count.c +++ b/tools/testing/selftests/bpf/prog_tests/trampoline_count.c @@ -4,7 +4,7 @@ #include <sys/prctl.h> #include <test_progs.h> -#define MAX_TRAMP_PROGS 40 +#define MAX_TRAMP_PROGS 38 struct inst { struct bpf_object *obj; @@ -52,7 +52,7 @@ void test_trampoline_count(void) struct bpf_link *link; char comm[16] = {}; - /* attach 'allowed' 40 trampoline programs */ + /* attach 'allowed' trampoline programs */ for (i = 0; i < MAX_TRAMP_PROGS; i++) { obj = bpf_object__open_file(object, NULL); if (CHECK(IS_ERR(obj), "obj_open_file", "err %ld\n", PTR_ERR(obj))) { |