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Diffstat (limited to 'sys/contrib/altq/altq/altq_codel.h')
| -rw-r--r-- | sys/contrib/altq/altq/altq_codel.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sys/contrib/altq/altq/altq_codel.h b/sys/contrib/altq/altq/altq_codel.h new file mode 100644 index 0000000..991af42 --- /dev/null +++ b/sys/contrib/altq/altq/altq_codel.h @@ -0,0 +1,129 @@ +/* + * CoDel - The Controlled-Delay Active Queue Management algorithm + * + * Copyright (C) 2013 Ermal Luçi <eri@FreeBSD.org> + * Copyright (C) 2011-2012 Kathleen Nichols <nichols@pollere.com> + * Copyright (C) 2011-2012 Van Jacobson <van@pollere.net> + * Copyright (C) 2012 Michael D. Taht <dave.taht@bufferbloat.net> + * Copyright (C) 2012 Eric Dumazet <edumazet@google.com> + * + * 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, + * without modification. + * 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. The names of the authors may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * Alternatively, provided that this notice is retained in full, this + * software may be distributed under the terms of the GNU General + * Public License ("GPL") version 2, in which case the provisions of the + * GPL apply INSTEAD OF those given above. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT + * OWNER 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. + * + * $FreeBSD$ + */ + +#ifndef _ALTQ_ALTQ_CODEL_H_ +#define _ALTQ_ALTQ_CODEL_H_ + +struct codel_stats { + u_int32_t maxpacket; + struct pktcntr drop_cnt; + u_int marked_packets; +}; + +struct codel_ifstats { + u_int qlength; + u_int qlimit; + struct codel_stats stats; + struct pktcntr cl_xmitcnt; /* transmitted packet counter */ + struct pktcntr cl_dropcnt; /* dropped packet counter */ +}; + +#ifdef _KERNEL +#include <altq/altq_classq.h> + +/** + * struct codel_params - contains codel parameters + * <at> target: target queue size (in time units) + * <at> interval: width of moving time window + * <at> ecn: is Explicit Congestion Notification enabled + */ +struct codel_params { + u_int64_t target; + u_int64_t interval; + int ecn; +}; + +/** + * struct codel_vars - contains codel variables + * <at> count: how many drops we've done since the last time we + * entered dropping state + * <at> lastcount: count at entry to dropping state + * <at> dropping: set to true if in dropping state + * <at> rec_inv_sqrt: reciprocal value of sqrt(count) >> 1 + * <at> first_above_time: when we went (or will go) continuously above + * target for interval + * <at> drop_next: time to drop next packet, or when we dropped last + * <at> ldelay: sojourn time of last dequeued packet + */ +struct codel_vars { + u_int32_t count; + u_int32_t lastcount; + int dropping; + u_int16_t rec_inv_sqrt; + u_int64_t first_above_time; + u_int64_t drop_next; + u_int64_t ldelay; +}; + +struct codel { + int last_pps; + struct codel_params params; + struct codel_vars vars; + struct codel_stats stats; + struct timeval last_log; + u_int32_t drop_overlimit; +}; + +/* + * codel interface state + */ +struct codel_if { + struct codel_if *cif_next; /* interface state list */ + struct ifaltq *cif_ifq; /* backpointer to ifaltq */ + u_int cif_bandwidth; /* link bandwidth in bps */ + + class_queue_t *cl_q; /* class queue structure */ + struct codel codel; + + /* statistics */ + struct codel_ifstats cl_stats; +}; + +struct codel *codel_alloc(int, int, int); +void codel_destroy(struct codel *); +int codel_addq(struct codel *, class_queue_t *, struct mbuf *); +struct mbuf *codel_getq(struct codel *, class_queue_t *); +void codel_getstats(struct codel *, struct codel_stats *); + +#endif /* _KERNEL */ + +#endif /* _ALTQ_ALTQ_CODEL_H_ */ |
