diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/task_local_storage_exit_creds.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/task_local_storage_exit_creds.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/task_local_storage_exit_creds.c b/tools/testing/selftests/bpf/progs/task_local_storage_exit_creds.c new file mode 100644 index 0000000000..41d88ed222 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/task_local_storage_exit_creds.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Facebook */ + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_TASK_STORAGE); + __uint(map_flags, BPF_F_NO_PREALLOC); + __type(key, int); + __type(value, __u64); +} task_storage SEC(".maps"); + +int run_count = 0; +int valid_ptr_count = 0; +int null_ptr_count = 0; + +SEC("fentry/exit_creds") +int BPF_PROG(trace_exit_creds, struct task_struct *task) +{ + __u64 *ptr; + + ptr = bpf_task_storage_get(&task_storage, task, 0, + BPF_LOCAL_STORAGE_GET_F_CREATE); + if (ptr) + __sync_fetch_and_add(&valid_ptr_count, 1); + else + __sync_fetch_and_add(&null_ptr_count, 1); + + __sync_fetch_and_add(&run_count, 1); + return 0; +} |