187 lines
6.7 KiB
C
187 lines
6.7 KiB
C
/*-
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* Copyright (C) 1997-2003
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* Sony Computer Science Laboratories Inc. All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT 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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* $KAME: if_altq.h,v 1.12 2005/04/13 03:44:25 suz Exp $
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* $FreeBSD$
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*/
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#ifndef _ALTQ_IF_ALTQ_H_
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#define _ALTQ_IF_ALTQ_H_
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#include <sys/lock.h> /* XXX */
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#include <sys/mutex.h> /* XXX */
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#include <sys/event.h> /* XXX */
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struct altq_pktattr; struct tb_regulator; struct top_cdnr;
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/*
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* Structure defining a queue for a network interface.
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*/
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struct ifaltq {
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/* fields compatible with struct ifqueue */
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struct mbuf *ifq_head;
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struct mbuf *ifq_tail;
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int ifq_len;
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int ifq_maxlen;
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struct mtx ifq_mtx;
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/* driver owned queue (used for bulk dequeue and prepend) UNLOCKED */
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struct mbuf *ifq_drv_head;
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struct mbuf *ifq_drv_tail;
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int ifq_drv_len;
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int ifq_drv_maxlen;
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/* alternate queueing related fields */
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int altq_type; /* discipline type */
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int altq_flags; /* flags (e.g. ready, in-use) */
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void *altq_disc; /* for discipline-specific use */
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struct ifnet *altq_ifp; /* back pointer to interface */
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int (*altq_enqueue)(struct ifaltq *, struct mbuf *,
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struct altq_pktattr *);
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struct mbuf *(*altq_dequeue)(struct ifaltq *, int);
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int (*altq_request)(struct ifaltq *, int, void *);
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/* classifier fields */
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void *altq_clfier; /* classifier-specific use */
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void *(*altq_classify)(void *, struct mbuf *, int);
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/* token bucket regulator */
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struct tb_regulator *altq_tbr;
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/* input traffic conditioner (doesn't belong to the output queue...) */
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struct top_cdnr *altq_cdnr;
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};
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#ifdef _KERNEL
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/*
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* packet attributes used by queueing disciplines.
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* pattr_class is a discipline-dependent scheduling class that is
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* set by a classifier.
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* pattr_hdr and pattr_af may be used by a discipline to access
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* the header within a mbuf. (e.g. ECN needs to update the CE bit)
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* note that pattr_hdr could be stale after m_pullup, though link
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* layer output routines usually don't use m_pullup. link-level
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* compression also invalidates these fields. thus, pattr_hdr needs
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* to be verified when a discipline touches the header.
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*/
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struct altq_pktattr {
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void *pattr_class; /* sched class set by classifier */
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int pattr_af; /* address family */
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caddr_t pattr_hdr; /* saved header position in mbuf */
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};
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/*
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* mbuf tag to carry a queue id (and hints for ECN).
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*/
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struct altq_tag {
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u_int32_t qid; /* queue id */
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/* hints for ecn */
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int af; /* address family */
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void *hdr; /* saved header position in mbuf */
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};
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/*
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* a token-bucket regulator limits the rate that a network driver can
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* dequeue packets from the output queue.
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* modern cards are able to buffer a large amount of packets and dequeue
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* too many packets at a time. this bursty dequeue behavior makes it
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* impossible to schedule packets by queueing disciplines.
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* a token-bucket is used to control the burst size in a device
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* independent manner.
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*/
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struct tb_regulator {
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int64_t tbr_rate; /* (scaled) token bucket rate */
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int64_t tbr_depth; /* (scaled) token bucket depth */
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int64_t tbr_token; /* (scaled) current token */
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int64_t tbr_filluptime; /* (scaled) time to fill up bucket */
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u_int64_t tbr_last; /* last time token was updated */
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int tbr_lastop; /* last dequeue operation type
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needed for poll-and-dequeue */
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};
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/* if_altqflags */
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#define ALTQF_READY 0x01 /* driver supports alternate queueing */
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#define ALTQF_ENABLED 0x02 /* altq is in use */
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#define ALTQF_CLASSIFY 0x04 /* classify packets */
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#define ALTQF_CNDTNING 0x08 /* altq traffic conditioning is enabled */
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#define ALTQF_DRIVER1 0x40 /* driver specific */
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/* if_altqflags set internally only: */
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#define ALTQF_CANTCHANGE (ALTQF_READY)
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/* altq_dequeue 2nd arg */
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#define ALTDQ_REMOVE 1 /* dequeue mbuf from the queue */
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#define ALTDQ_POLL 2 /* don't dequeue mbuf from the queue */
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/* altq request types (currently only purge is defined) */
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#define ALTRQ_PURGE 1 /* purge all packets */
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#define ALTQ_IS_READY(ifq) ((ifq)->altq_flags & ALTQF_READY)
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#ifdef ALTQ
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#define ALTQ_IS_ENABLED(ifq) ((ifq)->altq_flags & ALTQF_ENABLED)
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#else
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#define ALTQ_IS_ENABLED(ifq) 0
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#endif
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#define ALTQ_NEEDS_CLASSIFY(ifq) ((ifq)->altq_flags & ALTQF_CLASSIFY)
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#define ALTQ_IS_CNDTNING(ifq) ((ifq)->altq_flags & ALTQF_CNDTNING)
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#define ALTQ_SET_CNDTNING(ifq) ((ifq)->altq_flags |= ALTQF_CNDTNING)
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#define ALTQ_CLEAR_CNDTNING(ifq) ((ifq)->altq_flags &= ~ALTQF_CNDTNING)
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#define ALTQ_IS_ATTACHED(ifq) ((ifq)->altq_disc != NULL)
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#define ALTQ_ENQUEUE(ifq, m, pa, err) \
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(err) = (*(ifq)->altq_enqueue)((ifq),(m),(pa))
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#define ALTQ_DEQUEUE(ifq, m) \
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(m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_REMOVE)
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#define ALTQ_POLL(ifq, m) \
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(m) = (*(ifq)->altq_dequeue)((ifq), ALTDQ_POLL)
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#define ALTQ_PURGE(ifq) \
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(void)(*(ifq)->altq_request)((ifq), ALTRQ_PURGE, (void *)0)
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#define ALTQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0)
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#define TBR_IS_ENABLED(ifq) ((ifq)->altq_tbr != NULL)
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extern int altq_attach(struct ifaltq *, int, void *,
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int (*)(struct ifaltq *, struct mbuf *,
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struct altq_pktattr *),
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struct mbuf *(*)(struct ifaltq *, int),
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int (*)(struct ifaltq *, int, void *),
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void *,
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void *(*)(void *, struct mbuf *, int));
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extern int altq_detach(struct ifaltq *);
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extern int altq_enable(struct ifaltq *);
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extern int altq_disable(struct ifaltq *);
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extern struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int);
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extern int (*altq_input)(struct mbuf *, int);
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#if 0 /* ALTQ3_CLFIER_COMPAT */
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void altq_etherclassify(struct ifaltq *, struct mbuf *, struct altq_pktattr *);
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#endif
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#endif /* _KERNEL */
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#endif /* _ALTQ_IF_ALTQ_H_ */
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