1 /* $KAME: altq_rio.h,v 1.9 2003/07/10 12:07:49 kjc Exp $ */
4 * Copyright (C) 1998-2003
5 * Sony Computer Science Laboratories Inc. All rights reserved.
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29 #ifndef _ALTQ_ALTQ_RIO_H_
30 #define _ALTQ_ALTQ_RIO_H_
32 #include <altq/altq_classq.h>
35 * RIO: RED with IN/OUT bit
36 * (extended to support more than 2 drop precedence values)
38 #define RIO_NDROPPREC 3 /* number of drop precedence values */
41 struct rio_interface {
42 char rio_ifname[IFNAMSIZ];
46 struct rio_interface iface;
47 int q_len[RIO_NDROPPREC];
48 struct redstats q_stats[RIO_NDROPPREC];
50 /* static red parameters */
54 struct redparams q_params[RIO_NDROPPREC];
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; /* average packet time in usec */
63 int rio_flags; /* see below */
65 #endif /* ALTQ3_COMPAT */
68 #define RIOF_ECN4 0x01 /* use packet marking for IPv4 packets */
69 #define RIOF_ECN6 0x02 /* use packet marking for IPv6 packets */
70 #define RIOF_ECN (RIOF_ECN4 | RIOF_ECN6)
71 #define RIOF_CLEARDSCP 0x200 /* clear diffserv codepoint */
77 #define RIO_IF_ATTACH _IOW('Q', 1, struct rio_interface)
78 #define RIO_IF_DETACH _IOW('Q', 2, struct rio_interface)
79 #define RIO_ENABLE _IOW('Q', 3, struct rio_interface)
80 #define RIO_DISABLE _IOW('Q', 4, struct rio_interface)
81 #define RIO_CONFIG _IOWR('Q', 6, struct rio_conf)
82 #define RIO_GETSTATS _IOWR('Q', 12, struct rio_stats)
83 #define RIO_SETDEFAULTS _IOW('Q', 30, struct redparams[RIO_NDROPPREC])
84 #endif /* ALTQ3_COMPAT */
89 /* per drop precedence structure */
90 struct dropprec_state {
92 int inv_pmax; /* inverse of max drop probability */
93 int th_min; /* red min threshold */
94 int th_max; /* red max threshold */
96 /* variables for internal use */
97 int th_min_s; /* th_min scaled by avgshift */
98 int th_max_s; /* th_max scaled by avgshift */
99 int probd; /* drop probability denominator */
101 int qlen; /* queue length */
102 int avg; /* (scaled) queue length average */
103 int count; /* packet count since the last dropped/
105 int idle; /* queue was empty */
106 int old; /* avg is above th_min */
107 struct timeval last; /* timestamp when queue becomes idle */
108 } rio_precstate[RIO_NDROPPREC];
110 int rio_wshift; /* log(red_weight) */
111 int rio_weight; /* weight for EWMA */
112 struct wtab *rio_wtab; /* weight table */
114 int rio_pkttime; /* average packet time in micro sec
115 used for idle calibration */
116 int rio_flags; /* rio flags */
118 u_int8_t rio_codepoint; /* codepoint value to tag packets */
119 u_int8_t rio_codepointmask; /* codepoint mask bits */
121 struct redstats q_stats[RIO_NDROPPREC]; /* statistics */
125 typedef struct rio_queue {
126 struct rio_queue *rq_next; /* next red_state in the list */
127 struct ifaltq *rq_ifq; /* backpointer to ifaltq */
133 #endif /* ALTQ3_COMPAT */
135 extern rio_t *rio_alloc(int, struct redparams *, int, int);
136 extern void rio_destroy(rio_t *);
137 extern void rio_getstats(rio_t *, struct redstats *);
138 extern int rio_addq(rio_t *, class_queue_t *, struct mbuf *,
139 struct altq_pktattr *);
140 extern struct mbuf *rio_getq(rio_t *, class_queue_t *);
144 #endif /* _ALTQ_ALTQ_RIO_H_ */