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| author | Alexei Starovoitov <ast@kernel.org> | 2021-07-14 17:54:17 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-07-15 22:31:11 +0200 |
| commit | 61f71e746c72f07097b759809c36e814387bc24f (patch) | |
| tree | aa1cea02d78063f25858cd2f30d5b12f9dd3793d /tools/testing/selftests/bpf/prog_tests/timer_mim.c | |
| parent | 3540f7c6b96a62b581da5aa3d4c5af9408927bef (diff) | |
| download | lwn-61f71e746c72f07097b759809c36e814387bc24f.tar.gz lwn-61f71e746c72f07097b759809c36e814387bc24f.zip | |
selftests/bpf: Add a test with bpf_timer in inner map.
Check that map-in-map supports bpf timers.
Check that indirect "recursion" of timer callbacks works:
timer_cb1() { bpf_timer_set_callback(timer_cb2); }
timer_cb2() { bpf_timer_set_callback(timer_cb1); }
Check that
bpf_map_release
htab_free_prealloced_timers
bpf_timer_cancel_and_free
hrtimer_cancel
works while timer cb is running.
"while true; do ./test_progs -t timer_mim; done"
is a great stress test. It caught missing timer cancel in htab->extra_elems.
timer_mim_reject.c is a negative test that checks
that timer<->map mismatch is prevented.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/20210715005417.78572-12-alexei.starovoitov@gmail.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/timer_mim.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/timer_mim.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/timer_mim.c b/tools/testing/selftests/bpf/prog_tests/timer_mim.c new file mode 100644 index 000000000000..f5acbcbe33a4 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/timer_mim.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ +#include <test_progs.h> +#include "timer_mim.skel.h" +#include "timer_mim_reject.skel.h" + +static int timer_mim(struct timer_mim *timer_skel) +{ + __u32 duration = 0, retval; + __u64 cnt1, cnt2; + int err, prog_fd, key1 = 1; + + err = timer_mim__attach(timer_skel); + if (!ASSERT_OK(err, "timer_attach")) + return err; + + prog_fd = bpf_program__fd(timer_skel->progs.test1); + err = bpf_prog_test_run(prog_fd, 1, NULL, 0, + NULL, NULL, &retval, &duration); + ASSERT_OK(err, "test_run"); + ASSERT_EQ(retval, 0, "test_run"); + timer_mim__detach(timer_skel); + + /* check that timer_cb[12] are incrementing 'cnt' */ + cnt1 = READ_ONCE(timer_skel->bss->cnt); + usleep(200); /* 100 times more than interval */ + cnt2 = READ_ONCE(timer_skel->bss->cnt); + ASSERT_GT(cnt2, cnt1, "cnt"); + + ASSERT_EQ(timer_skel->bss->err, 0, "err"); + /* check that code paths completed */ + ASSERT_EQ(timer_skel->bss->ok, 1 | 2, "ok"); + + close(bpf_map__fd(timer_skel->maps.inner_htab)); + err = bpf_map_delete_elem(bpf_map__fd(timer_skel->maps.outer_arr), &key1); + ASSERT_EQ(err, 0, "delete inner map"); + + /* check that timer_cb[12] are no longer running */ + cnt1 = READ_ONCE(timer_skel->bss->cnt); + usleep(200); + cnt2 = READ_ONCE(timer_skel->bss->cnt); + ASSERT_EQ(cnt2, cnt1, "cnt"); + + return 0; +} + +void test_timer_mim(void) +{ + struct timer_mim_reject *timer_reject_skel = NULL; + libbpf_print_fn_t old_print_fn = NULL; + struct timer_mim *timer_skel = NULL; + int err; + + old_print_fn = libbpf_set_print(NULL); + timer_reject_skel = timer_mim_reject__open_and_load(); + libbpf_set_print(old_print_fn); + if (!ASSERT_ERR_PTR(timer_reject_skel, "timer_reject_skel_load")) + goto cleanup; + + timer_skel = timer_mim__open_and_load(); + if (!ASSERT_OK_PTR(timer_skel, "timer_skel_load")) + goto cleanup; + + err = timer_mim(timer_skel); + ASSERT_OK(err, "timer_mim"); +cleanup: + timer_mim__destroy(timer_skel); + timer_mim_reject__destroy(timer_reject_skel); +} |