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/* $KAME: altq_rmclass.h,v 1.10 2003/08/20 23:30:23 itojun Exp $ */
/*
* Copyright (c) 1991-1997 Regents of the University of California.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Network Research
* Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 THE REGENTS 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_RMCLASS_H_
#define _ALTQ_ALTQ_RMCLASS_H_
#include <altq/altq_classq.h>
/* #pragma ident "@(#)rm_class.h 1.20 97/10/23 SMI" */
#ifdef __cplusplus
extern "C" {
#endif
#define RM_MAXPRIO 8 /* Max priority */
#ifdef _KERNEL
typedef struct mbuf mbuf_t;
typedef struct rm_ifdat rm_ifdat_t;
typedef struct rm_class rm_class_t;
struct red;
/*
* Macros for dealing with time values. We assume all times are
* 'timevals'. `microtime' is used to get the best available clock
* resolution. If `microtime' *doesn't* return a value that's about
* ten times smaller than the average packet time on the fastest
* link that will use these routines, a slightly different clock
* scheme than this one should be used.
* (Bias due to truncation error in this scheme will overestimate utilization
* and discriminate against high bandwidth classes. To remove this bias an
* integrator needs to be added. The simplest integrator uses a history of
* 10 * avg.packet.time / min.tick.time packet completion entries. This is
* straight forward to add but we don't want to pay the extra memory
* traffic to maintain it if it's not necessary (occasionally a vendor
* accidentally builds a workstation with a decent clock - e.g., Sun & HP).)
*/
#define RM_GETTIME(now) microtime(&now)
#define TV_LT(a, b) (((a)->tv_sec < (b)->tv_sec) || \
(((a)->tv_usec < (b)->tv_usec) && ((a)->tv_sec <= (b)->tv_sec)))
#define TV_DELTA(a, b, delta) { \
register int xxs; \
\
delta = (a)->tv_usec - (b)->tv_usec; \
if ((xxs = (a)->tv_sec - (b)->tv_sec)) { \
switch (xxs) { \
default: \
/* if (xxs < 0) \
printf("rm_class: bogus time values\n"); */ \
delta = 0; \
/* fall through */ \
case 2: \
delta += 1000000; \
/* fall through */ \
case 1: \
delta += 1000000; \
break; \
} \
} \
}
#define TV_ADD_DELTA(a, delta, res) { \
register int xxus = (a)->tv_usec + (delta); \
\
(res)->tv_sec = (a)->tv_sec; \
while (xxus >= 1000000) { \
++((res)->tv_sec); \
xxus -= 1000000; \
} \
(res)->tv_usec = xxus; \
}
#define RM_TIMEOUT 2 /* 1 Clock tick. */
#if 1
#define RM_MAXQUEUED 1 /* this isn't used in ALTQ/CBQ */
#else
#define RM_MAXQUEUED 16 /* Max number of packets downstream of CBQ */
#endif
#define RM_MAXQUEUE 64 /* Max queue length */
#define RM_FILTER_GAIN 5 /* log2 of gain, e.g., 5 => 31/32 */
#define RM_POWER (1 << RM_FILTER_GAIN)
#define RM_MAXDEPTH 32
#define RM_NS_PER_SEC (1000000000)
typedef struct _rm_class_stats_ {
u_int handle;
u_int depth;
struct pktcntr xmit_cnt; /* packets sent in this class */
struct pktcntr drop_cnt; /* dropped packets */
u_int over; /* # times went over limit */
u_int borrows; /* # times tried to borrow */
u_int overactions; /* # times invoked overlimit action */
u_int delays; /* # times invoked delay actions */
} rm_class_stats_t;
/*
* CBQ Class state structure
*/
struct rm_class {
class_queue_t *q_; /* Queue of packets */
rm_ifdat_t *ifdat_;
int pri_; /* Class priority. */
int depth_; /* Class depth */
u_int ns_per_byte_; /* NanoSeconds per byte. */
u_int maxrate_; /* Bytes per second for this class. */
u_int allotment_; /* Fraction of link bandwidth. */
u_int w_allotment_; /* Weighted allotment for WRR */
int bytes_alloc_; /* Allocation for round of WRR */
int avgidle_;
int maxidle_;
int minidle_;
int offtime_;
int sleeping_; /* != 0 if delaying */
int qthresh_; /* Queue threshold for formal link sharing */
int leaf_; /* Note whether leaf class or not.*/
rm_class_t *children_; /* Children of this class */
rm_class_t *next_; /* Next pointer, used if child */
rm_class_t *peer_; /* Peer class */
rm_class_t *borrow_; /* Borrow class */
rm_class_t *parent_; /* Parent class */
void (*overlimit)(struct rm_class *, struct rm_class *);
void (*drop)(struct rm_class *); /* Class drop action. */
struct red *red_; /* RED state pointer */
struct altq_pktattr *pktattr_; /* saved hdr used by RED/ECN */
int flags_;
int last_pkttime_; /* saved pkt_time */
struct timeval undertime_; /* time can next send */
struct timeval last_; /* time last packet sent */
struct timeval overtime_;
struct callout callout_; /* for timeout() calls */
rm_class_stats_t stats_; /* Class Statistics */
};
/*
* CBQ Interface state
*/
struct rm_ifdat {
int queued_; /* # pkts queued downstream */
int efficient_; /* Link Efficency bit */
int wrr_; /* Enable Weighted Round-Robin */
u_long ns_per_byte_; /* Link byte speed. */
int maxqueued_; /* Max packets to queue */
int maxpkt_; /* Max packet size. */
int qi_; /* In/out pointers for downstream */
int qo_; /* packets */
/*
* Active class state and WRR state.
*/
rm_class_t *active_[RM_MAXPRIO]; /* Active cl's in each pri */
int na_[RM_MAXPRIO]; /* # of active cl's in a pri */
int num_[RM_MAXPRIO]; /* # of cl's per pri */
int alloc_[RM_MAXPRIO]; /* Byte Allocation */
u_long M_[RM_MAXPRIO]; /* WRR weights. */
/*
* Network Interface/Solaris Queue state pointer.
*/
struct ifaltq *ifq_;
rm_class_t *default_; /* Default Pkt class, BE */
rm_class_t *root_; /* Root Link class. */
rm_class_t *ctl_; /* Control Traffic class. */
void (*restart)(struct ifaltq *); /* Restart routine. */
/*
* Current packet downstream packet state and dynamic state.
*/
rm_class_t *borrowed_[RM_MAXQUEUED]; /* Class borrowed last */
rm_class_t *class_[RM_MAXQUEUED]; /* class sending */
int curlen_[RM_MAXQUEUED]; /* Current pktlen */
struct timeval now_[RM_MAXQUEUED]; /* Current packet time. */
int is_overlimit_[RM_MAXQUEUED];/* Current packet time. */
int cutoff_; /* Cut-off depth for borrowing */
struct timeval ifnow_; /* expected xmit completion time */
#if 1 /* ALTQ4PPP */
int maxiftime_; /* max delay inside interface */
#endif
rm_class_t *pollcache_; /* cached rm_class by poll operation */
};
/* flags for rmc_init and rmc_newclass */
/* class flags */
#define RMCF_RED 0x0001
#define RMCF_ECN 0x0002
#define RMCF_RIO 0x0004
#define RMCF_FLOWVALVE 0x0008 /* use flowvalve (aka penalty-box) */
#define RMCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
/* flags for rmc_init */
#define RMCF_WRR 0x0100
#define RMCF_EFFICIENT 0x0200
#define is_a_parent_class(cl) ((cl)->children_ != NULL)
extern rm_class_t *rmc_newclass(int, struct rm_ifdat *, u_int,
void (*)(struct rm_class *, struct rm_class *),
int, struct rm_class *, struct rm_class *,
u_int, int, u_int, int, int);
extern void rmc_delete_class(struct rm_ifdat *, struct rm_class *);
extern int rmc_modclass(struct rm_class *, u_int, int,
u_int, int, u_int, int);
extern void rmc_init(struct ifaltq *, struct rm_ifdat *, u_int,
void (*)(struct ifaltq *),
int, int, u_int, int, u_int, int);
extern int rmc_queue_packet(struct rm_class *, mbuf_t *);
extern mbuf_t *rmc_dequeue_next(struct rm_ifdat *, int);
extern void rmc_update_class_util(struct rm_ifdat *);
extern void rmc_delay_action(struct rm_class *, struct rm_class *);
extern void rmc_dropall(struct rm_class *);
extern int rmc_get_weight(struct rm_ifdat *, int);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _ALTQ_ALTQ_RMCLASS_H_ */