/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Definitions for the 'struct skb_array' datastructure. * * Author: * Michael S. Tsirkin <mst@redhat.com> * * Copyright (C) 2016 Red Hat, Inc. * * Limited-size FIFO of skbs. Can be used more or less whenever * sk_buff_head can be used, except you need to know the queue size in * advance. * Implemented as a type-safe wrapper around ptr_ring. #ifndef _LINUX_SKB_ARRAY_H#define _LINUX_SKB_ARRAY_H 1#ifdef __KERNEL__#include <linux/ptr_ring.h>#include <linux/skbuff.h>#include <linux/if_vlan.h>#endif struct skb_array {struct ptr_ring ring;/* Might be slightly faster than skb_array_full below, but callers invoking * this in a loop must use a compiler barrier, for example cpu_relax(). static inline bool __skb_array_full(struct skb_array *a)return __ptr_ring_full(&a->ring);static inline bool skb_array_full(struct skb_array *a)return ptr_ring_full(&a->ring);static inline int skb_array_produce(struct skb_array *a, struct sk_buff *skb)return ptr_ring_produce(&a->ring, skb);static inline int skb_array_produce_irq(struct skb_array *a, struct sk_buff *skb)return ptr_ring_produce_irq(&a->ring, skb);static inline int skb_array_produce_bh(struct skb_array *a, struct sk_buff *skb)return ptr_ring_produce_bh(&a->ring, skb);static inline int skb_array_produce_any(struct skb_array *a, struct sk_buff *skb)return ptr_ring_produce_any(&a->ring, skb);/* Might be slightly faster than skb_array_empty below, but only safe if the * array is never resized. Also, callers invoking this in a loop must take care * to use a compiler barrier, for example cpu_relax(). static inline bool __skb_array_empty(struct skb_array *a)return __ptr_ring_empty(&a->ring);static inline struct sk_buff *__skb_array_peek(struct skb_array *a)return __ptr_ring_peek(&a->ring);static inline bool skb_array_empty(struct skb_array *a)return ptr_ring_empty(&a->ring);static inline bool skb_array_empty_bh(struct skb_array *a)return ptr_ring_empty_bh(&a->ring);static inline bool skb_array_empty_irq(struct skb_array *a)return ptr_ring_empty_irq(&a->ring);static inline bool skb_array_empty_any(struct skb_array *a)return ptr_ring_empty_any(&a->ring);static inline struct sk_buff *__skb_array_consume(struct skb_array *a)return __ptr_ring_consume(&a->ring);static inline struct sk_buff *skb_array_consume(struct skb_array *a)return ptr_ring_consume(&a->ring);static inline int skb_array_consume_batched(struct skb_array *a,struct sk_buff **array, int n)return ptr_ring_consume_batched(&a->ring, (void **)array, n);static inline struct sk_buff *skb_array_consume_irq(struct skb_array *a)return ptr_ring_consume_irq(&a->ring);static inline int skb_array_consume_batched_irq(struct skb_array *a,struct sk_buff **array, int n)return ptr_ring_consume_batched_irq(&a->ring, (void **)array, n);static inline struct sk_buff *skb_array_consume_any(struct skb_array *a)return ptr_ring_consume_any(&a->ring);static inline int skb_array_consume_batched_any(struct skb_array *a,struct sk_buff **array, int n)return ptr_ring_consume_batched_any(&a->ring, (void **)array, n);static inline struct sk_buff *skb_array_consume_bh(struct skb_array *a)return ptr_ring_consume_bh(&a->ring);static inline int skb_array_consume_batched_bh(struct skb_array *a,struct sk_buff **array, int n)return ptr_ring_consume_batched_bh(&a->ring, (void **)array, n);static inline int __skb_array_len_with_tag(struct sk_buff *skb)if (likely(skb)) {int len = skb->len;if (skb_vlan_tag_present(skb))return len;else {return 0;static inline int skb_array_peek_len(struct skb_array *a)return PTR_RING_PEEK_CALL(&a->ring, __skb_array_len_with_tag);static inline int skb_array_peek_len_irq(struct skb_array *a)return PTR_RING_PEEK_CALL_IRQ(&a->ring, __skb_array_len_with_tag);static inline int skb_array_peek_len_bh(struct skb_array *a)return PTR_RING_PEEK_CALL_BH(&a->ring, __skb_array_len_with_tag);static inline int skb_array_peek_len_any(struct skb_array *a)return PTR_RING_PEEK_CALL_ANY(&a->ring, __skb_array_len_with_tag);static inline int skb_array_init_noprof(struct skb_array *a, int size, gfp_t gfp)return ptr_ring_init_noprof(&a->ring, size, gfp);#define skb_array_init(...) alloc_hooks(skb_array_init_noprof(__VA_ARGS__))static void __skb_array_destroy_skb(void *ptr)static inline void skb_array_unconsume(struct skb_array *a,struct sk_buff **skbs, int n)void **)skbs, n, __skb_array_destroy_skb);static inline int skb_array_resize(struct skb_array *a, int size, gfp_t gfp)return ptr_ring_resize(&a->ring, size, gfp, __skb_array_destroy_skb);static inline int skb_array_resize_multiple_bh_noprof(struct skb_array **rings,int nrings,unsigned int size,struct skb_array, ring));return ptr_ring_resize_multiple_bh_noprof((struct ptr_ring **)rings,#define skb_array_resize_multiple_bh(...) \static inline void skb_array_cleanup(struct skb_array *a)#endif /* _LINUX_SKB_ARRAY_H */ quality 100%
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