mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
32 lines
869 B
C
32 lines
869 B
C
|
#include <vmlinux.h>
|
||
|
|
#include <bpf/bpf_tracing.h>
|
||
|
|
#include "../test_kmods/bpf_testmod.h"
|
||
|
|
#include "bpf_misc.h"
|
||
|
|
|
||
|
|
char _license[] SEC("license") = "GPL";
|
||
|
|
|
||
|
|
__attribute__((nomerge)) extern void bpf_task_release(struct task_struct *p) __ksym;
|
||
|
|
|
||
|
|
/* This is a test BPF program that uses struct_ops to access a referenced
|
||
|
|
* kptr argument. This is a test for the verifier to ensure that it
|
||
|
|
* 1) recongnizes the task as a referenced object (i.e., ref_obj_id > 0), and
|
||
|
|
* 2) the same reference can be acquired from multiple paths as long as it
|
||
|
|
* has not been released.
|
||
|
|
*/
|
||
|
|
SEC("struct_ops/test_refcounted")
|
||
|
|
int BPF_PROG(refcounted, int dummy, struct task_struct *task)
|
||
|
|
{
|
||
|
|
if (dummy == 1)
|
||
|
|
bpf_task_release(task);
|
||
|
|
else
|
||
|
|
bpf_task_release(task);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SEC(".struct_ops.link")
|
||
|
|
struct bpf_testmod_ops testmod_refcounted = {
|
||
|
|
.test_refcounted = (void *)refcounted,
|
||
|
|
};
|
||
|
|
|
||
|
|
|