1 /* $NetBSD: pktqueue.h,v 1.8 2022/09/02 05:50:36 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Mindaugas Rasiukevicius. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _NET_PKTQUEUE_H_ 33 #define _NET_PKTQUEUE_H_ 34 35 #if !defined(_KERNEL) 36 #error "not supposed to be exposed to userland." 37 #endif 38 39 #include <sys/sysctl.h> 40 41 struct mbuf; 42 43 typedef struct pktqueue pktqueue_t; 44 45 typedef enum { PKTQ_MAXLEN, PKTQ_NITEMS, PKTQ_DROPS } pktq_count_t; 46 47 typedef uint32_t (*pktq_rps_hash_func_t)(const struct mbuf *); 48 #define PKTQ_RPS_HASH_NAME_LEN 32 49 50 pktqueue_t * pktq_create(size_t, void (*)(void *), void *); 51 void pktq_destroy(pktqueue_t *); 52 53 bool pktq_enqueue(pktqueue_t *, struct mbuf *, const u_int); 54 struct mbuf * pktq_dequeue(pktqueue_t *); 55 void pktq_barrier(pktqueue_t *); 56 void pktq_ifdetach(void); 57 void pktq_flush(pktqueue_t *); 58 int pktq_set_maxlen(pktqueue_t *, size_t); 59 60 uint32_t pktq_rps_hash(const pktq_rps_hash_func_t *, 61 const struct mbuf *); 62 extern const pktq_rps_hash_func_t pktq_rps_hash_default; 63 64 void pktq_sysctl_setup(pktqueue_t *, struct sysctllog **, 65 const struct sysctlnode *, const int); 66 67 int sysctl_pktq_rps_hash_handler(SYSCTLFN_PROTO); 68 69 #endif 70