bpf/progs/iters_css_task.c

1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2023 Chuyi Zhou <zhouchuyi@bytedance.com> */
30 	if (cur_task->pid != target_pid)  in BPF_PROG()
36 		return -EPERM;  in BPF_PROG()
38 	css = &cgrp->self;  in BPF_PROG()
42 		if (task->pid == target_pid)  in BPF_PROG()
47 	return -EPERM;  in BPF_PROG()
52 	return cgrp->kn->id;  in cgroup_id()
58 	struct seq_file *seq = ctx->meta->seq;  in cgroup_id_printer()  local
59 	struct cgroup *cgrp = ctx->cgroup;  in cgroup_id_printer()
65 		BPF_SEQ_PRINTF(seq, "epilogue\n");  in cgroup_id_printer()
70 	if (ctx->meta->seq_num == 0)  in cgroup_id_printer()
71 		BPF_SEQ_PRINTF(seq, "prologue\n");  in cgroup_id_printer()
73 	BPF_SEQ_PRINTF(seq, "%8llu\n", cgroup_id(cgrp));  in cgroup_id_printer()
75 	css = &cgrp->self;  in cgroup_id_printer()
78 		if (task->pid == target_pid)  in cgroup_id_printer()
95 	css = &cgrp->self;  in BPF_PROG()