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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2024 Benjamin Tissoires
*/
#include "bpf_experimental.h"
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
#include "../bpf_testmod/bpf_testmod_kfunc.h"
char _license[] SEC("license") = "GPL";
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, struct bpf_wq *work)
{
bpf_kfunc_common_test();
return 0;
}
/* callback for sleepable workqueue */
static int wq_cb_sleepable(void *map, int *key, struct bpf_wq *work)
{
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_impl#") /* anchor message */
__msg("arg#0 doesn't point to a map value")
long test_wrong_wq_pointer(void *ctx)
{
int key = 0;
struct bpf_wq *wq;
wq = bpf_map_lookup_elem(&array, &key);
if (!wq)
return 1;
if (bpf_wq_init(wq, &array, 0))
return 2;
if (bpf_wq_set_callback((void *)&wq, wq_callback, 0))
return 3;
return -22;
}
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_impl#") /* anchor message */
__msg("off 1 doesn't point to 'struct bpf_wq' that is at 0")
long test_wrong_wq_pointer_offset(void *ctx)
{
int key = 0;
struct bpf_wq *wq;
wq = bpf_map_lookup_elem(&array, &key);
if (!wq)
return 1;
if (bpf_wq_init(wq, &array, 0))
return 2;
if (bpf_wq_set_callback((void *)wq + 1, wq_cb_sleepable, 0))
return 3;
return -22;
}
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