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
41struct mbuf;
42
43typedef struct pktqueue pktqueue_t;
44
45typedef enum { PKTQ_MAXLEN, PKTQ_NITEMS, PKTQ_DROPS } pktq_count_t;
46
47pktqueue_t * pktq_create(size_t, void (*)(void *), void *);
48void pktq_destroy(pktqueue_t *);
49
50bool pktq_enqueue(pktqueue_t *, struct mbuf *, const u_int);
51struct mbuf * pktq_dequeue(pktqueue_t *);
52void pktq_barrier(pktqueue_t *);
53void pktq_flush(pktqueue_t *);
54int pktq_set_maxlen(pktqueue_t *, size_t);
55
56uint32_t pktq_rps_hash(const struct mbuf *);
57uint64_t pktq_get_count(pktqueue_t *, pktq_count_t);
58
59int sysctl_pktq_maxlen(SYSCTLFN_PROTO, pktqueue_t *);
60int sysctl_pktq_count(SYSCTLFN_PROTO, pktqueue_t *, u_int);
61
62#endif
63