1 /* $NetBSD: pktqueue.h,v 1.4 2014/06/16 00:40:10 ozaki-r 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 pktqueue_t * pktq_create(size_t, void (*)(void *), void *); 48 void pktq_destroy(pktqueue_t *); 49 50 bool pktq_enqueue(pktqueue_t *, struct mbuf *, const u_int); 51 struct mbuf * pktq_dequeue(pktqueue_t *); 52 void pktq_barrier(pktqueue_t *); 53 void pktq_flush(pktqueue_t *); 54 int pktq_set_maxlen(pktqueue_t *, size_t); 55 56 uint32_t pktq_rps_hash(const struct mbuf *); 57 uint64_t pktq_get_count(pktqueue_t *, pktq_count_t); 58 59 int sysctl_pktq_maxlen(SYSCTLFN_PROTO, pktqueue_t *); 60 int sysctl_pktq_count(SYSCTLFN_PROTO, pktqueue_t *, u_int); 61 62 #endif 63