0a70aaf8f5
CoDel is a parameterless queue discipline that handles variable bandwidth and RTT. It can be used as the single queue discipline on an interface or as a sub discipline of existing queue disciplines such as PRIQ, CBQ, HFSC, FAIRQ. Differential Revision: https://reviews.freebsd.org/D3272 Reviewd by: rpaulo, gnn (previous version) Obtained from: pfSense Sponsored by: Rubicon Communications (Netgate)
146 lines
4.9 KiB
C
146 lines
4.9 KiB
C
/*
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* Copyright (c) 2008 The DragonFly Project. All rights reserved.
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*
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* This code is derived from software contributed to The DragonFly Project
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* by Matthew Dillon <dillon@backplane.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name of The DragonFly Project nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific, prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $DragonFly: src/sys/net/altq/altq_fairq.h,v 1.1 2008/04/06 18:58:15 dillon Exp $
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* $FreeBSD$
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*/
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#ifndef _ALTQ_ALTQ_FAIRQ_H_
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#define _ALTQ_ALTQ_FAIRQ_H_
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#include <net/altq/altq.h>
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#include <net/altq/altq_classq.h>
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#include <net/altq/altq_codel.h>
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#include <net/altq/altq_red.h>
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#include <net/altq/altq_rio.h>
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#include <net/altq/altq_rmclass.h>
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#define FAIRQ_MAX_BUCKETS 2048 /* maximum number of sorting buckets */
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#define FAIRQ_MAXPRI RM_MAXPRIO
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#define FAIRQ_BITMAP_WIDTH (sizeof(fairq_bitmap_t)*8)
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#define FAIRQ_BITMAP_MASK (FAIRQ_BITMAP_WIDTH - 1)
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/* fairq class flags */
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#define FARF_RED 0x0001 /* use RED */
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#define FARF_ECN 0x0002 /* use RED/ECN */
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#define FARF_RIO 0x0004 /* use RIO */
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#define FARF_CODEL 0x0008 /* use CoDel */
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#define FARF_CLEARDSCP 0x0010 /* clear diffserv codepoint */
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#define FARF_DEFAULTCLASS 0x1000 /* default class */
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#define FARF_HAS_PACKETS 0x2000 /* might have queued packets */
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#define FARF_USERFLAGS (FARF_RED|FARF_ECN|FARF_RIO|FARF_CLEARDSCP| \
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FARF_DEFAULTCLASS)
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/* special class handles */
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#define FAIRQ_NULLCLASS_HANDLE 0
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typedef u_int fairq_bitmap_t;
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struct fairq_classstats {
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uint32_t class_handle;
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u_int qlength;
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u_int qlimit;
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struct pktcntr xmit_cnt; /* transmitted packet counter */
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struct pktcntr drop_cnt; /* dropped packet counter */
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/* codel, red and rio related info */
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int qtype;
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struct redstats red[3]; /* rio has 3 red stats */
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struct codel_stats codel;
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};
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#ifdef _KERNEL
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typedef struct fairq_bucket {
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struct fairq_bucket *next; /* circular list */
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struct fairq_bucket *prev; /* circular list */
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class_queue_t queue; /* the actual queue */
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uint64_t bw_bytes; /* statistics used to calculate bw */
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uint64_t bw_delta; /* statistics used to calculate bw */
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uint64_t last_time;
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int in_use;
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} fairq_bucket_t;
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struct fairq_class {
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uint32_t cl_handle; /* class handle */
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u_int cl_nbuckets; /* (power of 2) */
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u_int cl_nbucket_mask; /* bucket mask */
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fairq_bucket_t *cl_buckets;
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fairq_bucket_t *cl_head; /* head of circular bucket list */
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fairq_bucket_t *cl_polled;
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union {
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struct red *cl_red; /* RED state */
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struct codel *cl_codel; /* CoDel state */
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} cl_aqm;
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#define cl_red cl_aqm.cl_red
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#define cl_codel cl_aqm.cl_codel
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u_int cl_hogs_m1;
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u_int cl_lssc_m1;
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u_int cl_bandwidth;
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uint64_t cl_bw_bytes;
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uint64_t cl_bw_delta;
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uint64_t cl_last_time;
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int cl_qtype; /* rollup */
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int cl_qlimit;
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int cl_pri; /* priority */
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int cl_flags; /* class flags */
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struct fairq_if *cl_pif; /* back pointer to pif */
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struct altq_pktattr *cl_pktattr; /* saved header used by ECN */
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/* round robin index */
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/* statistics */
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struct pktcntr cl_xmitcnt; /* transmitted packet counter */
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struct pktcntr cl_dropcnt; /* dropped packet counter */
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};
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/*
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* fairq interface state
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*/
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struct fairq_if {
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struct fairq_if *pif_next; /* interface state list */
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struct ifaltq *pif_ifq; /* backpointer to ifaltq */
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u_int pif_bandwidth; /* link bandwidth in bps */
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int pif_maxpri; /* max priority in use */
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struct fairq_class *pif_poll_cache;/* cached poll */
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struct fairq_class *pif_default; /* default class */
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struct fairq_class *pif_classes[FAIRQ_MAXPRI]; /* classes */
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};
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#endif /* _KERNEL */
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#endif /* _ALTQ_ALTQ_FAIRQ_H_ */
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