bsd/net/classq/classq.h

   1 /*
   2  * Copyright (c) 2007-2012 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 /*      $NetBSD: altq_classq.h,v 1.7 2006/10/12 19:59:08 peter Exp $    */
  30 /*      $KAME: altq_classq.h,v 1.6 2003/01/07 07:33:38 kjc Exp $        */
  31
  32 /*
  33  * Copyright (c) 1991-1997 Regents of the University of California.
  34  * All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the Network Research
  47  *      Group at Lawrence Berkeley Laboratory.
  48  * 4. Neither the name of the University nor of the Laboratory may be used
  49  *    to endorse or promote products derived from this software without
  50  *    specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  */
  64 /*
  65  * class queue definitions extracted from rm_class.h.
  66  */
  67 #ifndef _NET_CLASSQ_CLASSQ_H_
  68 #define _NET_CLASSQ_CLASSQ_H_
  69
  70 #ifdef PRIVATE
  71 #ifdef __cplusplus
  72 extern "C" {
  73 #endif
  74
  75 /*
  76  * Packet Queue types
  77  */
  78 typedef enum classq_type {
  79         Q_DROPHEAD,
  80         Q_DROPTAIL,
  81         Q_RED,
  82         Q_RIO,
  83         Q_BLUE,
  84         Q_SFB
  85 } classq_type_t;
  86
  87 /*
  88  * Packet Queue states
  89  */
  90 typedef enum classq_state {
  91         QS_RUNNING,
  92         QS_SUSPENDED
  93 } classq_state_t;
  94
  95 #define DEFAULT_QLIMIT  128 /* default */
  96
  97 /*
  98  * generic packet counter
  99  */
 100 struct pktcntr {
 101         u_int64_t       packets;
 102         u_int64_t       bytes;
 103 };
 104
 105 #ifdef BSD_KERNEL_PRIVATE
 106 #include <sys/mcache.h>
 107 #include <sys/mbuf.h>
 108 #include <sys/sysctl.h>
 109
 110 /*
 111  * Packet Queue structures and macros to manipulate them.
 112  */
 113 typedef struct _class_queue_ {
 114         MBUFQ_HEAD(mq_head) mbufq;      /* Packet queue */
 115         u_int32_t       qlen;   /* Queue length (in number of packets) */
 116         u_int32_t       qlim;   /* Queue limit (in number of packets*) */
 117         u_int64_t       qsize;  /* Approx. queue size (in number of bytes) */
 118         classq_type_t   qtype;  /* Queue type */
 119         classq_state_t  qstate; /* Queue state */
 120 } class_queue_t;
 121
 122 #define qtype(q)        (q)->qtype              /* Get queue type */
 123 #define qstate(q)       (q)->qstate             /* Get queue state */
 124 #define qlimit(q)       (q)->qlim               /* Max packets to be queued */
 125 #define qlen(q)         (q)->qlen               /* Current queue length. */
 126 #define qsize(q)        (q)->qsize              /* Approx. bytes in queue */
 127 /* #define      qtail(q)        MBUFQ_LAST(&(q)->mbufq) */
 128 #define qhead(q)        MBUFQ_FIRST(&(q)->mbufq)
 129
 130 #define qempty(q)       (qlen(q) == 0)  /* Is the queue empty?? */
 131 #define q_is_red(q)     (qtype(q) == Q_RED)     /* Is the queue a RED queue */
 132 #define q_is_rio(q)     (qtype(q) == Q_RIO)     /* Is the queue a RIO queue */
 133 #define q_is_blue(q)    (qtype(q) == Q_BLUE)    /* Is the queue a BLUE queue */
 134 #define q_is_sfb(q)     (qtype(q) == Q_SFB)     /* Is the queue a SFB queue */
 135 #define q_is_red_or_rio(q) (qtype(q) == Q_RED || qtype(q) == Q_RIO)
 136 #define q_is_suspended(q) (qstate(q) == QS_SUSPENDED)
 137
 138 #define PKTCNTR_ADD(_cntr, _pkt, _len) do {                             \
 139         (_cntr)->packets += (_pkt);                                     \
 140         (_cntr)->bytes += (_len);                                       \
 141 } while (0)
 142
 143 #define PKTCNTR_CLEAR(_cntr) do {                                       \
 144         (_cntr)->packets = 0;                                           \
 145         (_cntr)->bytes = 0;                                             \
 146 } while (0)
 147
 148 /* flags for mark_ecn() */
 149 #define CLASSQF_ECN4    0x01    /* use packet marking for IPv4 packets */
 150 #define CLASSQF_ECN6    0x02    /* use packet marking for IPv6 packets */
 151 #define CLASSQF_ECN     (CLASSQF_ECN4 | CLASSQF_ECN6)
 152
 153 extern u_int32_t classq_verbose;
 154
 155 SYSCTL_DECL(_net_classq);
 156
 157 extern void _qinit(class_queue_t *, int, int);
 158 extern void _addq(class_queue_t *, struct mbuf *);
 159 extern void _addq_multi(class_queue_t *, struct mbuf *, struct mbuf *,
 160     u_int32_t, u_int32_t);
 161 extern struct mbuf *_getq(class_queue_t *);
 162 extern struct mbuf *_getq_all(class_queue_t *);
 163 extern struct mbuf *_getq_tail(class_queue_t *);
 164 extern struct mbuf *_getq_random(class_queue_t *);
 165 extern struct mbuf *_getq_flow(class_queue_t *, u_int32_t);
 166 extern void _removeq(class_queue_t *, struct mbuf *);
 167 extern void _flushq(class_queue_t *);
 168 extern void _flushq_flow(class_queue_t *, u_int32_t, u_int32_t *, u_int32_t *);
 169
 170 extern void classq_init(void);
 171
 172 #if PF_ECN
 173 extern u_int8_t read_dsfield(struct mbuf *, struct pf_mtag *);
 174 extern void     write_dsfield(struct mbuf *, struct pf_mtag *, u_int8_t);
 175 extern int      mark_ecn(struct mbuf *, struct pf_mtag *, int);
 176 #endif /* PF_ECN */
 177 #endif /* BSD_KERNEL_PRIVATE */
 178
 179 #ifdef __cplusplus
 180 }
 181 #endif
 182 #endif /* PRIVATE */
 183 #endif /* _NET_CLASSQ_CLASSQ_H_ */