Annotation of sys/altq/altq_rio.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: altq_rio.h,v 1.6 2003/03/13 16:33:46 kjc Exp $ */
2: /* $KAME: altq_rio.h,v 1.5 2000/12/14 08:12:46 thorpej Exp $ */
3:
4: /*
5: * Copyright (C) 1998-2000
6: * Sony Computer Science Laboratories Inc. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _ALTQ_ALTQ_RIO_H_
31: #define _ALTQ_ALTQ_RIO_H_
32:
33: #include <altq/altq_classq.h>
34:
35: /*
36: * RIO: RED with IN/OUT bit
37: * (extended to support more than 2 drop precedence values)
38: */
39: #define RIO_NDROPPREC 3 /* number of drop precedence values */
40:
41: struct rio_interface {
42: char rio_ifname[IFNAMSIZ];
43: };
44:
45: struct rio_stats {
46: struct rio_interface iface;
47: int q_len[RIO_NDROPPREC];
48: struct redstats q_stats[RIO_NDROPPREC];
49:
50: /* static red parameters */
51: int q_limit;
52: int weight;
53: int flags;
54: struct redparams q_params[RIO_NDROPPREC];
55: };
56:
57: struct rio_conf {
58: struct rio_interface iface;
59: struct redparams q_params[RIO_NDROPPREC];
60: int rio_weight; /* weight for EWMA */
61: int rio_limit; /* max queue length */
62: int rio_pkttime; /* avg packet time in usec */
63: int rio_flags; /* see below */
64: };
65:
66: /* rio flags */
67: #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
68: #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
69: #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
70: #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
71:
72: #ifdef _KERNEL
73:
74: typedef struct rio {
75: /* per drop precedence structure */
76: struct dropprec_state {
77: /* red parameters */
78: int inv_pmax; /* inverse of max drop probability */
79: int th_min; /* red min threshold */
80: int th_max; /* red max threshold */
81:
82: /* variables for internal use */
83: int th_min_s; /* th_min scaled by avgshift */
84: int th_max_s; /* th_max scaled by avgshift */
85: int probd; /* drop probability denominator */
86:
87: int qlen; /* queue length */
88: int avg; /* (scaled) queue length average */
89: int count; /* packet count since the last dropped/
90: marked packet */
91: int idle; /* queue was empty */
92: int old; /* avg is above th_min */
93: struct timeval last; /* timestamp when queue becomes idle */
94: } rio_precstate[RIO_NDROPPREC];
95:
96: int rio_wshift; /* log(red_weight) */
97: int rio_weight; /* weight for EWMA */
98: struct wtab *rio_wtab; /* weight table */
99:
100: int rio_pkttime; /* average packet time in micro sec
101: used for idle calibration */
102: int rio_flags; /* rio flags */
103:
104: u_int8_t rio_codepoint; /* codepoint value to tag packets */
105: u_int8_t rio_codepointmask; /* codepoint mask bits */
106:
107: struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
108: } rio_t;
109:
110: typedef struct rio_queue {
111: struct rio_queue *rq_next; /* next red_state in the list */
112: struct ifaltq *rq_ifq; /* backpointer to ifaltq */
113:
114: class_queue_t *rq_q;
115:
116: rio_t *rq_rio;
117: } rio_queue_t;
118:
119: extern rio_t *rio_alloc(int, struct redparams *, int, int);
120: extern void rio_destroy(rio_t *);
121: extern void rio_getstats(rio_t *, struct redstats *);
122: extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *,
123: struct altq_pktattr *);
124: extern struct mbuf *rio_getq(rio_t *, class_queue_t *);
125:
126: #endif /* _KERNEL */
127:
128: #endif /* _ALTQ_ALTQ_RIO_H_ */
CVSweb