NetBSD/sys/altq/altq_hfsc.h

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/* $NetBSD: altq_hfsc.h,v 1.6 2005/02/26 23:04:16 perry Exp $ */
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/* $KAME: altq_hfsc.h,v 1.6 2000/12/14 08:12:46 thorpej Exp $ */
/*
* Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation is hereby granted (including for commercial or
* for-profit use), provided that both the copyright notice and this
* permission notice appear in all copies of the software, derivative
* works, or modified versions, and any portions thereof, and that
* both notices appear in supporting documentation, and that credit
* is given to Carnegie Mellon University in all publications reporting
* on direct or indirect use of this code or its derivatives.
*
* THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF
* WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS
* SOFTWARE IN ITS ``AS IS'' CONDITION, 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 CARNEGIE MELLON UNIVERSITY 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.
*
* Carnegie Mellon encourages (but does not require) users of this
* software to return any improvements or extensions that they make,
* and to grant Carnegie Mellon the rights to redistribute these
* changes without encumbrance.
*/
#ifndef _ALTQ_ALTQ_HFSC_H_
#define _ALTQ_ALTQ_HFSC_H_
#include <altq/altq.h>
#include <altq/altq_classq.h>
#include <altq/altq_red.h>
#include <altq/altq_rio.h>
#ifdef __cplusplus
extern "C" {
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#endif
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struct hfsc_interface {
char hfsc_ifname[IFNAMSIZ]; /* interface name (e.g., fxp0) */
};
struct hfsc_attach {
struct hfsc_interface iface;
u_int bandwidth; /* link bandwidth in bits/sec */
};
struct service_curve {
u_int m1; /* slope of the first segment in bits/sec */
u_int d; /* the x-projection of the first segment in msec */
u_int m2; /* slope of the second segment in bits/sec */
};
struct hfsc_add_class {
struct hfsc_interface iface;
u_long parent_handle;
struct service_curve service_curve;
int qlimit;
int flags;
u_long class_handle; /* return value */
};
/* special class handles */
#define HFSC_ROOTCLASS_HANDLE 0
#define HFSC_NULLCLASS_HANDLE 0
/* hfsc class flags */
#define HFCF_RED 0x0001 /* use RED */
#define HFCF_ECN 0x0002 /* use RED/ECN */
#define HFCF_RIO 0x0004 /* use RIO */
#define HFCF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
#define HFCF_DEFAULTCLASS 0x1000 /* default class */
struct hfsc_delete_class {
struct hfsc_interface iface;
u_long class_handle;
};
/* service curve types */
#define HFSC_REALTIMESC 1
#define HFSC_LINKSHARINGSC 2
#define HFSC_DEFAULTSC (HFSC_REALTIMESC|HFSC_LINKSHARINGSC)
struct hfsc_modify_class {
struct hfsc_interface iface;
u_long class_handle;
struct service_curve service_curve;
int sctype;
};
struct hfsc_add_filter {
struct hfsc_interface iface;
u_long class_handle;
struct flow_filter filter;
u_long filter_handle; /* return value */
};
struct hfsc_delete_filter {
struct hfsc_interface iface;
u_long filter_handle;
};
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struct hfsc_basic_class_stats {
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u_int class_id;
u_long class_handle;
struct service_curve rsc;
struct service_curve fsc;
u_int64_t total; /* total work in bytes */
u_int64_t cumul; /* cumulative work in bytes
done by real-time criteria */
u_int64_t d; /* deadline */
u_int64_t e; /* eligible time */
u_int64_t vt; /* virtual time */
u_int qlength;
struct pktcntr xmit_cnt;
struct pktcntr drop_cnt;
u_int period;
/* red and rio related info */
int qtype;
struct redstats red[3];
};
struct hfsc_class_stats {
struct hfsc_interface iface;
int nskip; /* skip # of classes */
int nclasses; /* # of class stats (WR) */
u_int64_t cur_time; /* current time */
u_int hif_classes; /* # of classes in the tree */
u_int hif_packets; /* # of packets in the tree */
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struct hfsc_basic_class_stats *stats; /* pointer to stats array */
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};
#define HFSC_IF_ATTACH _IOW('Q', 1, struct hfsc_attach)
#define HFSC_IF_DETACH _IOW('Q', 2, struct hfsc_interface)
#define HFSC_ENABLE _IOW('Q', 3, struct hfsc_interface)
#define HFSC_DISABLE _IOW('Q', 4, struct hfsc_interface)
#define HFSC_CLEAR_HIERARCHY _IOW('Q', 5, struct hfsc_interface)
#define HFSC_ADD_CLASS _IOWR('Q', 7, struct hfsc_add_class)
#define HFSC_DEL_CLASS _IOW('Q', 8, struct hfsc_delete_class)
#define HFSC_MOD_CLASS _IOW('Q', 9, struct hfsc_modify_class)
#define HFSC_ADD_FILTER _IOWR('Q', 10, struct hfsc_add_filter)
#define HFSC_DEL_FILTER _IOW('Q', 11, struct hfsc_delete_filter)
#define HFSC_GETSTATS _IOWR('Q', 12, struct hfsc_class_stats)
#ifdef _KERNEL
/*
* kernel internal service curve representation
* coordinates are given by 64 bit unsigned integers.
* x-axis: unit is clock count. for the intel x86 architecture,
* the raw Pentium TSC (Timestamp Counter) value is used.
* virtual time is also calculated in this time scale.
* y-axis: unit is byte.
*
* the service curve parameters are converted to the internal
* representation.
* the slope values are scaled to avoid overflow.
* the inverse slope values as well as the y-projection of the 1st
* segment are kept in order to to avoid 64-bit divide operations
* that are expensive on 32-bit architectures.
*
* note: Intel Pentium TSC never wraps around in several thousands of years.
* x-axis doesn't wrap around for 1089 years with 1GHz clock.
* y-axis doesn't wrap around for 4358 years with 1Gbps bandwidth.
*/
/* kernel internal representation of a service curve */
struct internal_sc {
u_int64_t sm1; /* scaled slope of the 1st segment */
u_int64_t ism1; /* scaled inverse-slope of the 1st segment */
u_int64_t dx; /* the x-projection of the 1st segment */
u_int64_t dy; /* the y-projection of the 1st segment */
u_int64_t sm2; /* scaled slope of the 2nd segment */
u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */
};
/* runtime service curve */
struct runtime_sc {
u_int64_t x; /* current starting position on x-axis */
u_int64_t y; /* current starting position on x-axis */
u_int64_t sm1; /* scaled slope of the 1st segment */
u_int64_t ism1; /* scaled inverse-slope of the 1st segment */
u_int64_t dx; /* the x-projection of the 1st segment */
u_int64_t dy; /* the y-projection of the 1st segment */
u_int64_t sm2; /* scaled slope of the 2nd segment */
u_int64_t ism2; /* scaled inverse-slope of the 2nd segment */
};
/* for TAILQ based ellist and actlist implementation */
struct hfsc_class;
typedef TAILQ_HEAD(_eligible, hfsc_class) ellist_t;
typedef TAILQ_ENTRY(hfsc_class) elentry_t;
typedef TAILQ_HEAD(_active, hfsc_class) actlist_t;
typedef TAILQ_ENTRY(hfsc_class) actentry_t;
#define ellist_first(s) TAILQ_FIRST(s)
#define actlist_first(s) TAILQ_FIRST(s)
#define actlist_last(s) TAILQ_LAST(s, _active)
struct hfsc_class {
u_int cl_id; /* class id (just for debug) */
u_long cl_handle; /* class handle */
struct hfsc_if *cl_hif; /* back pointer to struct hfsc_if */
int cl_flags; /* misc flags */
struct hfsc_class *cl_parent; /* parent class */
struct hfsc_class *cl_siblings; /* sibling classes */
struct hfsc_class *cl_children; /* child classes */
class_queue_t *cl_q; /* class queue structure */
struct red *cl_red; /* RED state */
struct altq_pktattr *cl_pktattr; /* saved header used by ECN */
u_int64_t cl_total; /* total work in bytes */
u_int64_t cl_cumul; /* cumulative work in bytes
done by real-time criteria */
u_int64_t cl_d; /* deadline */
u_int64_t cl_e; /* eligible time */
u_int64_t cl_vt; /* virtual time */
struct internal_sc *cl_rsc; /* internal real-time service curve */
struct internal_sc *cl_fsc; /* internal fair service curve */
struct runtime_sc cl_deadline; /* deadline curve */
struct runtime_sc cl_eligible; /* eligible curve */
struct runtime_sc cl_virtual; /* virtual curve */
u_int cl_vtperiod; /* vt period sequence no */
u_int cl_parentperiod; /* parent's vt period seqno */
int cl_nactive; /* number of active children */
actlist_t *cl_actc; /* active children list */
actentry_t cl_actlist; /* active children list entry */
elentry_t cl_ellist; /* eligible list entry */
struct {
struct pktcntr xmit_cnt;
struct pktcntr drop_cnt;
u_int period;
} cl_stats;
};
/*
* hfsc interface state
*/
struct hfsc_if {
struct hfsc_if *hif_next; /* interface state list */
struct ifaltq *hif_ifq; /* backpointer to ifaltq */
struct hfsc_class *hif_rootclass; /* root class */
struct hfsc_class *hif_defaultclass; /* default class */
struct hfsc_class *hif_pollcache; /* cache for poll operation */
u_int hif_classes; /* # of classes in the tree */
u_int hif_packets; /* # of packets in the tree */
u_int hif_classid; /* class id sequence number */
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ellist_t *hif_eligible; /* eligible list */
struct acc_classifier hif_classifier;
};
#endif /* _KERNEL */
#ifdef __cplusplus
}
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#endif
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#endif /* _ALTQ_ALTQ_HFSC_H_ */