| 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 | |