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linux-stable/tools/testing/selftests/bpf/prog_tests/exceptions.c

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16 KiB
C
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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <network_helpers.h>
#include "exceptions.skel.h"
#include "exceptions_ext.skel.h"
#include "exceptions_fail.skel.h"
#include "exceptions_assert.skel.h"
static char log_buf[1024 * 1024];
static void test_exceptions_failure(void)
{
RUN_TESTS(exceptions_fail);
}
static void test_exceptions_success(void)
{
LIBBPF_OPTS(bpf_test_run_opts, ropts,
.data_in = &pkt_v4,
.data_size_in = sizeof(pkt_v4),
.repeat = 1,
);
struct exceptions_ext *eskel = NULL;
struct exceptions *skel;
int ret;
skel = exceptions__open();
if (!ASSERT_OK_PTR(skel, "exceptions__open"))
return;
ret = exceptions__load(skel);
if (!ASSERT_OK(ret, "exceptions__load"))
goto done;
if (!ASSERT_OK(bpf_map_update_elem(bpf_map__fd(skel->maps.jmp_table), &(int){0},
&(int){bpf_program__fd(skel->progs.exception_tail_call_target)}, BPF_ANY),
"bpf_map_update_elem jmp_table"))
goto done;
#define RUN_SUCCESS(_prog, return_val) \
if (!test__start_subtest(#_prog)) goto _prog##_##return_val; \
ret = bpf_prog_test_run_opts(bpf_program__fd(skel->progs._prog), &ropts); \
ASSERT_OK(ret, #_prog " prog run ret"); \
ASSERT_EQ(ropts.retval, return_val, #_prog " prog run retval"); \
_prog##_##return_val:
RUN_SUCCESS(exception_throw_always_1, 64);
RUN_SUCCESS(exception_throw_always_2, 32);
RUN_SUCCESS(exception_throw_unwind_1, 16);
RUN_SUCCESS(exception_throw_unwind_2, 32);
RUN_SUCCESS(exception_throw_default, 0);
RUN_SUCCESS(exception_throw_default_value, 5);
RUN_SUCCESS(exception_tail_call, 24);
RUN_SUCCESS(exception_ext, 0);
RUN_SUCCESS(exception_ext_mod_cb_runtime, 35);
RUN_SUCCESS(exception_throw_subprog, 1);
RUN_SUCCESS(exception_assert_nz_gfunc, 1);
RUN_SUCCESS(exception_assert_zero_gfunc, 1);
RUN_SUCCESS(exception_assert_neg_gfunc, 1);
RUN_SUCCESS(exception_assert_pos_gfunc, 1);
RUN_SUCCESS(exception_assert_negeq_gfunc, 1);
RUN_SUCCESS(exception_assert_poseq_gfunc, 1);
RUN_SUCCESS(exception_assert_nz_gfunc_with, 1);
RUN_SUCCESS(exception_assert_zero_gfunc_with, 1);
RUN_SUCCESS(exception_assert_neg_gfunc_with, 1);
RUN_SUCCESS(exception_assert_pos_gfunc_with, 1);
RUN_SUCCESS(exception_assert_negeq_gfunc_with, 1);
RUN_SUCCESS(exception_assert_poseq_gfunc_with, 1);
RUN_SUCCESS(exception_bad_assert_nz_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_zero_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_neg_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_pos_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_negeq_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_poseq_gfunc, 0);
RUN_SUCCESS(exception_bad_assert_nz_gfunc_with, 100);
RUN_SUCCESS(exception_bad_assert_zero_gfunc_with, 105);
RUN_SUCCESS(exception_bad_assert_neg_gfunc_with, 200);
RUN_SUCCESS(exception_bad_assert_pos_gfunc_with, 0);
RUN_SUCCESS(exception_bad_assert_negeq_gfunc_with, 101);
RUN_SUCCESS(exception_bad_assert_poseq_gfunc_with, 99);
RUN_SUCCESS(exception_assert_range, 1);
RUN_SUCCESS(exception_assert_range_with, 1);
RUN_SUCCESS(exception_bad_assert_range, 0);
RUN_SUCCESS(exception_bad_assert_range_with, 10);
#define RUN_EXT(load_ret, attach_err, expr, msg, after_link) \
{ \
LIBBPF_OPTS(bpf_object_open_opts, o, .kernel_log_buf = log_buf, \
.kernel_log_size = sizeof(log_buf), \
.kernel_log_level = 2); \
exceptions_ext__destroy(eskel); \
eskel = exceptions_ext__open_opts(&o); \
struct bpf_program *prog = NULL; \
struct bpf_link *link = NULL; \
if (!ASSERT_OK_PTR(eskel, "exceptions_ext__open")) \
goto done; \
(expr); \
ASSERT_OK_PTR(bpf_program__name(prog), bpf_program__name(prog)); \
if (!ASSERT_EQ(exceptions_ext__load(eskel), load_ret, \
"exceptions_ext__load")) { \
printf("%s\n", log_buf); \
goto done; \
} \
if (load_ret != 0) { \
if (!ASSERT_OK_PTR(strstr(log_buf, msg), "strstr")) { \
printf("%s\n", log_buf); \
goto done; \
} \
} \
if (!load_ret && attach_err) { \
if (!ASSERT_ERR_PTR(link = bpf_program__attach(prog), "attach err")) \
goto done; \
} else if (!load_ret) { \
if (!ASSERT_OK_PTR(link = bpf_program__attach(prog), "attach ok")) \
goto done; \
(void)(after_link); \
bpf_link__destroy(link); \
} \
}
if (test__start_subtest("non-throwing fentry -> exception_cb"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.pfentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod"), "set_attach_target"))
goto done;
}), "FENTRY/FEXIT programs cannot attach to exception callback", 0);
if (test__start_subtest("throwing fentry -> exception_cb"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.throwing_fentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod"), "set_attach_target"))
goto done;
}), "FENTRY/FEXIT programs cannot attach to exception callback", 0);
if (test__start_subtest("non-throwing fexit -> exception_cb"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.pfexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod"), "set_attach_target"))
goto done;
}), "FENTRY/FEXIT programs cannot attach to exception callback", 0);
if (test__start_subtest("throwing fexit -> exception_cb"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.throwing_fexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod"), "set_attach_target"))
goto done;
}), "FENTRY/FEXIT programs cannot attach to exception callback", 0);
if (test__start_subtest("throwing extension (with custom cb) -> exception_cb"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.throwing_exception_cb_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod"), "set_attach_target"))
goto done;
}), "Extension programs cannot attach to exception callback", 0);
if (test__start_subtest("throwing extension -> global func in exception_cb"))
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_exception_cb_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext_mod_cb_runtime),
"exception_cb_mod_global"), "set_attach_target"))
goto done;
}), "", ({ RUN_SUCCESS(exception_ext_mod_cb_runtime, 131); }));
if (test__start_subtest("throwing extension (with custom cb) -> global func in exception_cb"))
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_ext),
"exception_ext_global"), "set_attach_target"))
goto done;
}), "", ({ RUN_SUCCESS(exception_ext, 128); }));
if (test__start_subtest("non-throwing fentry -> non-throwing subprog"))
/* non-throwing fentry -> non-throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.pfentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing fentry -> non-throwing subprog"))
/* throwing fentry -> non-throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_fentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("non-throwing fentry -> throwing subprog"))
/* non-throwing fentry -> throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.pfentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing fentry -> throwing subprog"))
/* throwing fentry -> throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_fentry;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("non-throwing fexit -> non-throwing subprog"))
/* non-throwing fexit -> non-throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.pfexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing fexit -> non-throwing subprog"))
/* throwing fexit -> non-throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_fexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("non-throwing fexit -> throwing subprog"))
/* non-throwing fexit -> throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.pfexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing fexit -> throwing subprog"))
/* throwing fexit -> throwing subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_fexit;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_subprog"), "set_attach_target"))
goto done;
}), "", 0);
/* fmod_ret not allowed for subprog - Check so we remember to handle its
* throwing specification compatibility with target when supported.
*/
if (test__start_subtest("non-throwing fmod_ret -> non-throwing subprog"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.pfmod_ret;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "can't modify return codes of BPF program", 0);
/* fmod_ret not allowed for subprog - Check so we remember to handle its
* throwing specification compatibility with target when supported.
*/
if (test__start_subtest("non-throwing fmod_ret -> non-throwing global subprog"))
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.pfmod_ret;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"global_subprog"), "set_attach_target"))
goto done;
}), "can't modify return codes of BPF program", 0);
if (test__start_subtest("non-throwing extension -> non-throwing subprog"))
/* non-throwing extension -> non-throwing subprog : BAD (!global) */
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"subprog"), "set_attach_target"))
goto done;
}), "subprog() is not a global function", 0);
if (test__start_subtest("non-throwing extension -> throwing subprog"))
/* non-throwing extension -> throwing subprog : BAD (!global) */
RUN_EXT(-EINVAL, true, ({
prog = eskel->progs.extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_subprog"), "set_attach_target"))
goto done;
}), "throwing_subprog() is not a global function", 0);
if (test__start_subtest("non-throwing extension -> non-throwing subprog"))
/* non-throwing extension -> non-throwing global subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"global_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("non-throwing extension -> throwing global subprog"))
/* non-throwing extension -> throwing global subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_global_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing extension -> throwing global subprog"))
/* throwing extension -> throwing global subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"throwing_global_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing extension -> non-throwing global subprog"))
/* throwing extension -> non-throwing global subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"global_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("non-throwing extension -> main subprog"))
/* non-throwing extension -> main subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"exception_throw_subprog"), "set_attach_target"))
goto done;
}), "", 0);
if (test__start_subtest("throwing extension -> main subprog"))
/* throwing extension -> main subprog : OK */
RUN_EXT(0, false, ({
prog = eskel->progs.throwing_extension;
bpf_program__set_autoload(prog, true);
if (!ASSERT_OK(bpf_program__set_attach_target(prog,
bpf_program__fd(skel->progs.exception_throw_subprog),
"exception_throw_subprog"), "set_attach_target"))
goto done;
}), "", 0);
done:
exceptions_ext__destroy(eskel);
exceptions__destroy(skel);
}
static void test_exceptions_assertions(void)
{
RUN_TESTS(exceptions_assert);
}
void test_exceptions(void)
{
test_exceptions_success();
test_exceptions_failure();
test_exceptions_assertions();
}
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