diff options
author | Jiong Wang <jiong.wang@netronome.com> | 2019-02-11 12:01:20 +0000 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2019-02-11 20:31:38 -0800 |
commit | bd4aed0ee73ca873bef3cb3ec746dd796f03df28 (patch) | |
tree | 1dcd4de735f8ca3dbf672dc5d48d064ea1dea5dc /tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c | |
parent | 4836b4637ef080c2764c44ee40ed354cdb991d79 (diff) |
selftests: bpf: centre kernel bpf objects under new subdir "progs"
At the moment, all kernel bpf objects are listed under BPF_OBJ_FILES.
Listing them manually sometimes causing patch conflict when people are
adding new testcases simultaneously.
It is better to centre all the related source files under a subdir
"progs", then auto-generate the object file list.
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c b/tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c new file mode 100644 index 000000000000..014dba10b8a5 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/get_cgroup_id_kern.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2018 Facebook + +#include <linux/bpf.h> +#include "bpf_helpers.h" + +struct bpf_map_def SEC("maps") cg_ids = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(__u32), + .value_size = sizeof(__u64), + .max_entries = 1, +}; + +struct bpf_map_def SEC("maps") pidmap = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(__u32), + .value_size = sizeof(__u32), + .max_entries = 1, +}; + +SEC("tracepoint/syscalls/sys_enter_nanosleep") +int trace(void *ctx) +{ + __u32 pid = bpf_get_current_pid_tgid(); + __u32 key = 0, *expected_pid; + __u64 *val; + + expected_pid = bpf_map_lookup_elem(&pidmap, &key); + if (!expected_pid || *expected_pid != pid) + return 0; + + val = bpf_map_lookup_elem(&cg_ids, &key); + if (val) + *val = bpf_get_current_cgroup_id(); + + return 0; +} + +char _license[] SEC("license") = "GPL"; +__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */ |