/* $NetBSD: altq_red.h,v 1.5 2006/10/12 19:59:08 peter Exp $ */ /* $KAME: altq_red.h,v 1.8 2003/07/10 12:07:49 kjc Exp $ */ /* * Copyright (C) 1997-2003 * Sony Computer Science Laboratories Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _ALTQ_ALTQ_RED_H_ #define _ALTQ_ALTQ_RED_H_ #include <altq/altq_classq.h> #ifdef ALTQ3_COMPAT struct red_interface { char red_ifname[IFNAMSIZ]; }; struct red_stats { struct red_interface iface; int q_len; int q_avg; struct pktcntr xmit_cnt; struct pktcntr drop_cnt; u_int drop_forced; u_int drop_unforced; u_int marked_packets; /* static red parameters */ int q_limit; int weight; int inv_pmax; int th_min; int th_max; /* flowvalve related stuff */ u_int fv_flows; u_int fv_pass; u_int fv_predrop; u_int fv_alloc; u_int fv_escape; }; struct red_conf { struct red_interface iface; int red_weight; /* weight for EWMA */ int red_inv_pmax; /* inverse of max drop probability */ int red_thmin; /* red min threshold */ int red_thmax; /* red max threshold */ int red_limit; /* max queue length */ int red_pkttime; /* average packet time in usec */ int red_flags; /* see below */ }; #endif /* ALTQ3_COMPAT */ /* red flags */ #define REDF_ECN4 0x01 /* use packet marking for IPv4 packets */ #define REDF_ECN6 0x02 /* use packet marking for IPv6 packets */ #define REDF_ECN (REDF_ECN4 | REDF_ECN6) #define REDF_FLOWVALVE 0x04 /* use flowvalve (aka penalty-box) */ /* * simpler versions of red parameters and statistics used by other * disciplines (e.g., CBQ) */ struct redparams { int th_min; /* red min threshold */ int th_max; /* red max threshold */ int inv_pmax; /* inverse of max drop probability */ }; struct redstats { int q_avg; struct pktcntr xmit_cnt; struct pktcntr drop_cnt; u_int drop_forced; u_int drop_unforced; u_int marked_packets; }; #ifdef ALTQ3_COMPAT /* * IOCTLs for RED */ #define RED_IF_ATTACH _IOW('Q', 1, struct red_interface) #define RED_IF_DETACH _IOW('Q', 2, struct red_interface) #define RED_ENABLE _IOW('Q', 3, struct red_interface) #define RED_DISABLE _IOW('Q', 4, struct red_interface) #define RED_CONFIG _IOWR('Q', 6, struct red_conf) #define RED_GETSTATS _IOWR('Q', 12, struct red_stats) #define RED_SETDEFAULTS _IOW('Q', 30, struct redparams) #endif /* ALTQ3_COMPAT */ #ifdef _KERNEL #ifdef ALTQ3_COMPAT struct flowvalve; #endif /* weight table structure for idle time calibration */ struct wtab { struct wtab *w_next; int w_weight; int w_param_max; int w_refcount; int32_t w_tab[32]; }; typedef struct red { int red_pkttime; /* average packet time in micro sec used for idle calibration */ int red_flags; /* red flags */ /* red parameters */ int red_weight; /* weight for EWMA */ int red_inv_pmax; /* inverse of max drop probability */ int red_thmin; /* red min threshold */ int red_thmax; /* red max threshold */ /* variables for internal use */ int red_wshift; /* log(red_weight) */ int red_thmin_s; /* th_min scaled by avgshift */ int red_thmax_s; /* th_max scaled by avgshift */ int red_probd; /* drop probability denominator */ int red_avg; /* queue len avg scaled by avgshift */ int red_count; /* packet count since last dropped/ marked packet */ int red_idle; /* queue was empty */ int red_old; /* avg is above th_min */ struct wtab *red_wtab; /* weight table */ struct timeval red_last; /* time when the queue becomes idle */ #ifdef ALTQ3_COMPAT struct flowvalve *red_flowvalve; /* flowvalve state */ #endif struct { struct pktcntr xmit_cnt; struct pktcntr drop_cnt; u_int drop_forced; u_int drop_unforced; u_int marked_packets; } red_stats; } red_t; #ifdef ALTQ3_COMPAT typedef struct red_queue { struct red_queue *rq_next; /* next red_state in the list */ struct ifaltq *rq_ifq; /* backpointer to ifaltq */ class_queue_t *rq_q; red_t *rq_red; } red_queue_t; #endif /* ALTQ3_COMPAT */ /* red drop types */ #define DTYPE_NODROP 0 /* no drop */ #define DTYPE_FORCED 1 /* a "forced" drop */ #define DTYPE_EARLY 2 /* an "unforced" (early) drop */ extern red_t *red_alloc(int, int, int, int, int, int); extern void red_destroy(red_t *); extern void red_getstats(red_t *, struct redstats *); extern int red_addq(red_t *, class_queue_t *, struct mbuf *, struct altq_pktattr *); extern struct mbuf *red_getq(red_t *, class_queue_t *); extern int drop_early(int, int, int); extern int mark_ecn(struct mbuf *, struct altq_pktattr *, int); extern struct wtab *wtab_alloc(int); extern int wtab_destroy(struct wtab *); extern int32_t pow_w(struct wtab *, int); #endif /* _KERNEL */ #endif /* _ALTQ_ALTQ_RED_H_ */
