tools/testing/selftests/bpf/progs/wq_failures.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/wq_failures.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/wq_failures.c
Extension
.c
Size
3314 bytes
Lines
168
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct elem {
	struct bpf_wq w;
};

struct {
	__uint(type, BPF_MAP_TYPE_ARRAY);
	__uint(max_entries, 2);
	__type(key, int);
	__type(value, struct elem);
} array SEC(".maps");

struct {
	__uint(type, BPF_MAP_TYPE_LRU_HASH);
	__uint(max_entries, 4);
	__type(key, int);
	__type(value, struct elem);
} lru SEC(".maps");

/* callback for non sleepable workqueue */
static int wq_callback(void *map, int *key, void *value)
{
	bpf_kfunc_common_test();
	return 0;
}

/* callback for sleepable workqueue */
static int wq_cb_sleepable(void *map, int *key, void *value)
{
	bpf_kfunc_call_test_sleepable();
	return 0;
}

SEC("tc")
/* test that bpf_wq_init takes a map as a second argument
 */
__log_level(2)
__flag(BPF_F_TEST_STATE_FREQ)
__failure
__msg(": (85) call bpf_wq_init#") /* anchor message */
__msg("pointer in R2 isn't map pointer")
long test_wq_init_nomap(void *ctx)
{
	struct bpf_wq *wq;
	struct elem *val;
	int key = 0;

	val = bpf_map_lookup_elem(&array, &key);
	if (!val)
		return -1;

	wq = &val->w;
	if (bpf_wq_init(wq, &key, 0) != 0)
		return -3;

	return 0;
}

SEC("tc")
/* test that the workqueue is part of the map in bpf_wq_init
 */
__log_level(2)
__flag(BPF_F_TEST_STATE_FREQ)
__failure
__msg(": (85) call bpf_wq_init#") /* anchor message */
__msg("workqueue pointer in R1 map_uid=0 doesn't match map pointer in R2 map_uid=0")
long test_wq_init_wrong_map(void *ctx)
{
	struct bpf_wq *wq;
	struct elem *val;
	int key = 0;

	val = bpf_map_lookup_elem(&array, &key);
	if (!val)
		return -1;

	wq = &val->w;
	if (bpf_wq_init(wq, &lru, 0) != 0)
		return -3;

	return 0;
}

SEC("?tc")
__log_level(2)
__failure
/* check that the first argument of bpf_wq_set_callback()
 * is a correct bpf_wq pointer.
 */
__msg(": (85) call bpf_wq_set_callback#") /* anchor message */
__msg("R1 doesn't point to a map value")

Annotation

Implementation Notes