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26 * $KAME: altq_red.h,v 1.8 2003/07/10 12:07:49 kjc Exp $
30 #ifndef _ALTQ_ALTQ_RED_H_
31 #define _ALTQ_ALTQ_RED_H_
33 #include <net/altq/altq_classq.h>
36 struct red_interface {
37 char red_ifname[IFNAMSIZ];
41 struct red_interface iface;
45 struct pktcntr xmit_cnt;
46 struct pktcntr drop_cnt;
51 /* static red parameters */
58 /* flowvalve related stuff */
67 struct red_interface iface;
68 int red_weight; /* weight for EWMA */
69 int red_inv_pmax; /* inverse of max drop probability */
70 int red_thmin; /* red min threshold */
71 int red_thmax; /* red max threshold */
72 int red_limit; /* max queue length */
73 int red_pkttime; /* average packet time in usec */
74 int red_flags; /* see below */
76 #endif /* ALTQ3_COMPAT */
79 #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */
80 #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */
81 #define REDF_ECN (REDF_ECN4 | REDF_ECN6)
82 #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */
85 * simpler versions of red parameters and statistics used by other
86 * disciplines (e.g., CBQ)
89 int th_min; /* red min threshold */
90 int th_max; /* red max threshold */
91 int inv_pmax; /* inverse of max drop probability */
96 struct pktcntr xmit_cnt;
97 struct pktcntr drop_cnt;
100 u_int marked_packets;
107 #define RED_IF_ATTACH _IOW('Q', 1, struct red_interface)
108 #define RED_IF_DETACH _IOW('Q', 2, struct red_interface)
109 #define RED_ENABLE _IOW('Q', 3, struct red_interface)
110 #define RED_DISABLE _IOW('Q', 4, struct red_interface)
111 #define RED_CONFIG _IOWR('Q', 6, struct red_conf)
112 #define RED_GETSTATS _IOWR('Q', 12, struct red_stats)
113 #define RED_SETDEFAULTS _IOW('Q', 30, struct redparams)
114 #endif /* ALTQ3_COMPAT */
122 /* weight table structure for idle time calibration */
132 int red_pkttime; /* average packet time in micro sec
133 used for idle calibration */
134 int red_flags; /* red flags */
137 int red_weight; /* weight for EWMA */
138 int red_inv_pmax; /* inverse of max drop probability */
139 int red_thmin; /* red min threshold */
140 int red_thmax; /* red max threshold */
142 /* variables for internal use */
143 int red_wshift; /* log(red_weight) */
144 int red_thmin_s; /* th_min scaled by avgshift */
145 int red_thmax_s; /* th_max scaled by avgshift */
146 int red_probd; /* drop probability denominator */
148 int red_avg; /* queue len avg scaled by avgshift */
149 int red_count; /* packet count since last dropped/
151 int red_idle; /* queue was empty */
152 int red_old; /* avg is above th_min */
153 struct wtab *red_wtab; /* weight table */
154 struct timeval red_last; /* time when the queue becomes idle */
157 struct flowvalve *red_flowvalve; /* flowvalve state */
161 struct pktcntr xmit_cnt;
162 struct pktcntr drop_cnt;
165 u_int marked_packets;
170 typedef struct red_queue {
171 struct red_queue *rq_next; /* next red_state in the list */
172 struct ifaltq *rq_ifq; /* backpointer to ifaltq */
178 #endif /* ALTQ3_COMPAT */
181 #define DTYPE_NODROP 0 /* no drop */
182 #define DTYPE_FORCED 1 /* a "forced" drop */
183 #define DTYPE_EARLY 2 /* an "unforced" (early) drop */
185 extern red_t *red_alloc(int, int, int, int, int, int);
186 extern void red_destroy(red_t *);
187 extern void red_getstats(red_t *, struct redstats *);
188 extern int red_addq(red_t *, class_queue_t *, struct mbuf *,
189 struct altq_pktattr *);
190 extern struct mbuf *red_getq(red_t *, class_queue_t *);
191 extern int drop_early(int, int, int);
192 extern int mark_ecn(struct mbuf *, struct altq_pktattr *, int);
193 extern struct wtab *wtab_alloc(int);
194 extern int wtab_destroy(struct wtab *);
195 extern int32_t pow_w(struct wtab *, int);
199 #endif /* _ALTQ_ALTQ_RED_H_ */