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selftests/bpf: Add selftests for bpf_task_from_pid()

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Add some selftest testcases that validate the expected behavior of the
bpf_task_from_pid() kfunc that was added in the prior patch.

Signed-off-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20221122145300.251210-3-void@manifault.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
David Vernet
2022-11-22 08:53:00 -06:00
committed by Alexei Starovoitov
parent 3f0e6f2b41
commit f471748b7f
4 changed files with 91 additions and 0 deletions
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4
tools/testing/selftests/bpf/prog_tests/task_kfunc.c
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@@ -78,6 +78,9 @@ static const char * const success_tests[] = {
"test_task_xchg_release",
"test_task_get_release",
"test_task_current_acquire_release",
"test_task_from_pid_arg",
"test_task_from_pid_current",
"test_task_from_pid_invalid",
};
static struct {
@@ -99,6 +102,7 @@ static struct {
{"task_kfunc_release_fp", "arg#0 pointer type STRUCT task_struct must point"},
{"task_kfunc_release_null", "arg#0 is ptr_or_null_ expected ptr_ or socket"},
{"task_kfunc_release_unacquired", "release kernel function bpf_task_release expects"},
{"task_kfunc_from_pid_no_null_check", "arg#0 is ptr_or_null_ expected ptr_ or socket"},
};
static void verify_fail(const char *prog_name, const char *expected_err_msg)