xref: /openbmc/linux/tools/testing/selftests/bpf/progs/bpf_iter_test_kern_common.h (revision 4b4193256c8d3bc3a5397b5cd9494c2ad386317d) 
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2020 Facebook */
3 #include "bpf_iter.h"
4 #include <bpf/bpf_helpers.h>
5 
6 char _license[] SEC("license") = "GPL";
7 int count = 0;
8 
9 SEC("iter/task")
dump_task(struct bpf_iter__task * ctx)10 int dump_task(struct bpf_iter__task *ctx)
11 {
12 	struct seq_file *seq = ctx->meta->seq;
13 	char c;
14 
15 	if (count < 4) {
16 		c = START_CHAR + count;
17 		bpf_seq_write(seq, &c, sizeof(c));
18 		count++;
19 	}
20 
21 	return 0;
22 }
23