1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * KUnit resource management helpers for SKBs (skbuff).
4 *
5 * Copyright (C) 2023 Intel Corporation
6 */
7
8#ifndef _KUNIT_SKBUFF_H
9#define _KUNIT_SKBUFF_H
10
11#include <kunit/resource.h>
12#include <linux/skbuff.h>
13
14static void kunit_action_kfree_skb(void *p)
15{
16	kfree_skb((struct sk_buff *)p);
17}
18
19/**
20 * kunit_zalloc_skb() - Allocate and initialize a resource managed skb.
21 * @test: The test case to which the skb belongs
22 * @len: size to allocate
23 *
24 * Allocate a new struct sk_buff with GFP_KERNEL, zero fill the give length
25 * and add it as a resource to the kunit test for automatic cleanup.
26 *
27 * Returns: newly allocated SKB, or %NULL on error
28 */
29static inline struct sk_buff *kunit_zalloc_skb(struct kunit *test, int len,
30					       gfp_t gfp)
31{
32	struct sk_buff *res = alloc_skb(len, GFP_KERNEL);
33
34	if (!res || skb_pad(res, len))
35		return NULL;
36
37	if (kunit_add_action_or_reset(test, kunit_action_kfree_skb, res))
38		return NULL;
39
40	return res;
41}
42
43/**
44 * kunit_kfree_skb() - Like kfree_skb except for allocations managed by KUnit.
45 * @test: The test case to which the resource belongs.
46 * @skb: The SKB to free.
47 */
48static inline void kunit_kfree_skb(struct kunit *test, struct sk_buff *skb)
49{
50	if (!skb)
51		return;
52
53	kunit_release_action(test, kunit_action_kfree_skb, (void *)skb);
54}
55
56#endif /* _KUNIT_SKBUFF_H */
57