From: Benjamin Berg benjamin.berg@intel.com
Add a simple convenience helper to allocate and zero fill an SKB for the use by a kunit test. Also provide a way to free it again in case that may be desirable.
This simply mirrors the kunit_kmalloc API.
Signed-off-by: Benjamin Berg benjamin.berg@intel.com --- include/kunit/skbuff.h | 51 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 include/kunit/skbuff.h
diff --git a/include/kunit/skbuff.h b/include/kunit/skbuff.h new file mode 100644 index 000000000000..947fc8b5b48f --- /dev/null +++ b/include/kunit/skbuff.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Base unit test (KUnit) API. + * + * Copyright (C) 2023 Intel Corporation + */ + +#ifndef _KUNIT_SKBUFF_H +#define _KUNIT_SKBUFF_H + +#include <kunit/resource.h> +#include <linux/skbuff.h> + +/** + * kunit_zalloc_skb() - Allocate and initialize a resource managed skb. + * @test: The test case to which the skb belongs + * @len: size to allocate + * + * Allocate a new struct sk_buff with GFP_KERNEL, zero fill the give length + * and add it as a resource to the kunit test for automatic cleanup. + * + * Returns: newly allocated SKB, or %NULL on error + */ +static inline struct sk_buff *kunit_zalloc_skb(struct kunit *test, int len, + gfp_t gfp) +{ + struct sk_buff *res = alloc_skb(len, GFP_KERNEL); + + if (!res || skb_pad(res, len)) + return NULL; + + if (kunit_add_action_or_reset(test, (kunit_action_t *)kfree_skb, res)) + return NULL; + + return res; +} + +/** + * kunit_kfree_skb() - Like kfree_skb except for allocations managed by KUnit. + * @test: The test case to which the resource belongs. + * @skb: The SKB to free. + */ +static inline void kunit_kfree_skb(struct kunit *test, struct sk_buff *skb) +{ + if (!skb) + return; + + kunit_release_action(test, (kunit_action_t *)kfree_skb, (void *)skb); +} + +#endif /* _KUNIT_SKBUFF_H */