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 14 static 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 */ 29 static 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 */ 48 static 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