diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/preempted_bpf_ma_op.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/preempted_bpf_ma_op.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/preempted_bpf_ma_op.c b/tools/testing/selftests/bpf/progs/preempted_bpf_ma_op.c new file mode 100644 index 000000000000..55907ef961bf --- /dev/null +++ b/tools/testing/selftests/bpf/progs/preempted_bpf_ma_op.c @@ -0,0 +1,106 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2023. Huawei Technologies Co., Ltd */ +#include <vmlinux.h> +#include <bpf/bpf_tracing.h> +#include <bpf/bpf_helpers.h> + +#include "bpf_experimental.h" + +struct bin_data { + char data[256]; + struct bpf_spin_lock lock; +}; + +struct map_value { + struct bin_data __kptr * data; +}; + +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __type(key, int); + __type(value, struct map_value); + __uint(max_entries, 2048); +} array SEC(".maps"); + +char _license[] SEC("license") = "GPL"; + +bool nomem_err = false; + +static int del_array(unsigned int i, int *from) +{ + struct map_value *value; + struct bin_data *old; + + value = bpf_map_lookup_elem(&array, from); + if (!value) + return 1; + + old = bpf_kptr_xchg(&value->data, NULL); + if (old) + bpf_obj_drop(old); + + (*from)++; + return 0; +} + +static int add_array(unsigned int i, int *from) +{ + struct bin_data *old, *new; + struct map_value *value; + + value = bpf_map_lookup_elem(&array, from); + if (!value) + return 1; + + new = bpf_obj_new(typeof(*new)); + if (!new) { + nomem_err = true; + return 1; + } + + old = bpf_kptr_xchg(&value->data, new); + if (old) + bpf_obj_drop(old); + + (*from)++; + return 0; +} + +static void del_then_add_array(int from) +{ + int i; + + i = from; + bpf_loop(512, del_array, &i, 0); + + i = from; + bpf_loop(512, add_array, &i, 0); +} + +SEC("fentry/bpf_fentry_test1") +int BPF_PROG2(test0, int, a) +{ + del_then_add_array(0); + return 0; +} + +SEC("fentry/bpf_fentry_test2") +int BPF_PROG2(test1, int, a, u64, b) +{ + del_then_add_array(512); + return 0; +} + +SEC("fentry/bpf_fentry_test3") +int BPF_PROG2(test2, char, a, int, b, u64, c) +{ + del_then_add_array(1024); + return 0; +} + +SEC("fentry/bpf_fentry_test4") +int BPF_PROG2(test3, void *, a, char, b, int, c, u64, d) +{ + del_then_add_array(1536); + return 0; +} |