170 lines
6 KiB
C
170 lines
6 KiB
C
/*
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* Copyright (c) 2011-2020 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _NET_CLASSQ_CLASSQ_SFB_H_
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#define _NET_CLASSQ_CLASSQ_SFB_H_
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#ifdef PRIVATE
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#ifdef BSD_KERNEL_PRIVATE
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#include <stdbool.h>
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#include <sys/time.h>
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#include <net/flowadv.h>
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#include <net/classq/if_classq.h>
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#endif /* BSD_KERNEL_PRIVATE */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SFB_FP_SHIFT 14 /* fixed-point shift (Q14) */
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#define SFB_LEVELS 2 /* L */
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#define SFB_BINS_SHIFT 5
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#define SFB_BINS (1 << SFB_BINS_SHIFT) /* N */
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struct sfbstats {
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u_int64_t drop_early;
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u_int64_t drop_pbox;
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u_int64_t drop_queue;
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u_int64_t marked_packets;
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u_int64_t pbox_packets;
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u_int64_t pbox_time;
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u_int64_t hold_time;
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u_int64_t dequeue_avg;
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u_int64_t rehash_intval;
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u_int64_t num_rehash;
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u_int64_t null_flowid;
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u_int64_t flow_controlled;
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u_int64_t flow_feedback;
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u_int64_t dequeue_stall;
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};
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struct sfbbinstats {
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int16_t pmark; /* marking probability in Q format */
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u_int16_t pkts; /* number of packets */
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u_int32_t bytes; /* number of bytes */
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};
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struct sfb_stats {
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u_int32_t allocation;
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u_int32_t dropthresh;
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u_int32_t clearpkts;
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u_int32_t current;
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u_int64_t target_qdelay;
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u_int64_t update_interval;
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u_int64_t min_estdelay;
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u_int32_t delay_fcthreshold;
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u_int32_t flags;
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struct sfbstats sfbstats;
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struct sfbbins {
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struct sfbbinstats stats[SFB_LEVELS][SFB_BINS];
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} binstats[2] __attribute__((aligned(8)));
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};
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#ifdef BSD_KERNEL_PRIVATE
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struct sfb_bins {
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u_int32_t fudge;
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struct sfbbinstats stats[SFB_LEVELS][SFB_BINS];
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struct timespec freezetime[SFB_LEVELS][SFB_BINS];
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};
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struct sfb_fcl {
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u_int32_t cnt;
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struct flowadv_fclist fclist;
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};
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/* SFB flags */
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#define SFBF_ECN4 0x01 /* use packet marking for IPv4 packets */
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#define SFBF_ECN6 0x02 /* use packet marking for IPv6 packets */
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#define SFBF_ECN (SFBF_ECN4 | SFBF_ECN6)
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#define SFBF_FLOWCTL 0x04 /* enable flow control advisories */
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#define SFBF_DELAYBASED 0x08 /* queueing is delay based */
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#define SFBF_DELAYHIGH 0x10 /* Estimated delay is greater than target */
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#define SFBF_LAST_PKT_DROPPED 0x20 /* Last packet dropped */
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#define SFBF_SUSPENDED 0x1000 /* queue is suspended */
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#define SFBF_USERFLAGS \
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(SFBF_ECN4 | SFBF_ECN6 | SFBF_FLOWCTL | SFBF_DELAYBASED)
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typedef struct sfb {
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/* variables for internal use */
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u_int32_t sfb_flags; /* SFB flags */
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u_int32_t sfb_qlim;
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u_int32_t sfb_qid;
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u_int16_t sfb_allocation;
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u_int16_t sfb_drop_thresh;
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u_int32_t sfb_clearpkts;
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u_int64_t sfb_eff_rate; /* last known effective rate */
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struct timespec sfb_getqtime; /* last dequeue timestamp */
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struct timespec sfb_holdtime; /* random holdtime in nsec */
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struct ifnet *sfb_ifp; /* back pointer to ifnet */
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/* target queue delay and interval for queue sizing */
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u_int64_t sfb_target_qdelay;
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struct timespec sfb_update_interval;
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u_int64_t sfb_fc_threshold; /* for flow control feedback */
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/* variables for computing estimated delay of the queue */
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u_int64_t sfb_min_qdelay;
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struct timespec sfb_update_time;
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/* moving hash function */
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struct timespec sfb_hinterval; /* random reset interval in sec */
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struct timespec sfb_nextreset; /* reset deadline */
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/* penalty box */
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struct timespec sfb_pboxtime; /* random pboxtime in nsec */
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struct timespec sfb_pboxfreeze;
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/* B[L][N] bins (2 sets: current and warm-up) */
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u_int32_t sfb_current; /* current set (0 or 1) */
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struct sfb_bins (*sfb_bins)[ 2];
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/* Flow control lists for current set */
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struct sfb_fcl (*sfb_fc_lists)[ SFB_BINS];
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/* statistics */
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struct sfbstats sfb_stats __attribute__((aligned(8)));
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} sfb_t;
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extern struct sfb *sfb_alloc(struct ifnet *, u_int32_t, u_int32_t, u_int32_t);
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extern void sfb_destroy(struct sfb *);
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extern int sfb_addq(struct sfb *, class_queue_t *, pktsched_pkt_t *,
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struct pf_mtag *);
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extern void sfb_getq(struct sfb *, class_queue_t *, pktsched_pkt_t *);
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extern void sfb_purgeq(struct sfb *, class_queue_t *, u_int32_t,
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u_int32_t *, u_int32_t *);
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extern void sfb_getstats(struct sfb *, struct sfb_stats *);
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extern void sfb_updateq(struct sfb *, cqev_t);
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extern int sfb_suspendq(struct sfb *, class_queue_t *, boolean_t);
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#endif /* BSD_KERNEL_PRIVATE */
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#ifdef __cplusplus
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}
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#endif
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#endif /* PRIVATE */
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#endif /* _NET_CLASSQ_CLASSQ_SFB_H_ */
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