1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | #include "vmlinux.h" |
3 | #include <bpf/bpf_helpers.h> |
4 | #include <bpf/bpf_endian.h> |
5 | |
6 | #define TEST_COMM_LEN 16 |
7 | |
8 | struct { |
9 | __uint(type, BPF_MAP_TYPE_CGROUP_ARRAY); |
10 | __uint(max_entries, 1); |
11 | __type(key, u32); |
12 | __type(value, u32); |
13 | } cgroup_map SEC(".maps" ); |
14 | |
15 | char _license[] SEC("license" ) = "GPL" ; |
16 | |
17 | SEC("tc" ) |
18 | int test_skb_helpers(struct __sk_buff *skb) |
19 | { |
20 | struct task_struct *task; |
21 | char comm[TEST_COMM_LEN]; |
22 | __u32 tpid; |
23 | |
24 | task = (struct task_struct *)bpf_get_current_task(); |
25 | bpf_probe_read_kernel(&tpid , sizeof(tpid), &task->tgid); |
26 | bpf_probe_read_kernel_str(&comm, sizeof(comm), &task->comm); |
27 | return 0; |
28 | } |
29 | |