diff options
Diffstat (limited to 'freebsd/sys/netpfil/ipfw/dn_sched_fq_codel.h')
| -rw-r--r-- | freebsd/sys/netpfil/ipfw/dn_sched_fq_codel.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/freebsd/sys/netpfil/ipfw/dn_sched_fq_codel.h b/freebsd/sys/netpfil/ipfw/dn_sched_fq_codel.h new file mode 100644 index 00000000..4b65781e --- /dev/null +++ b/freebsd/sys/netpfil/ipfw/dn_sched_fq_codel.h @@ -0,0 +1,167 @@ +/*- + * Copyright (C) 2016 Centre for Advanced Internet Architectures, + * Swinburne University of Technology, Melbourne, Australia. + * Portions of this code were made possible in part by a gift from + * The Comcast Innovation Fund. + * Implemented by Rasool Al-Saadi <ralsaadi@swin.edu.au> + * + * 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. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +/* + * FQ_Codel Structures and helper functions + * + * $FreeBSD$ + */ + +#ifndef _IP_DN_SCHED_FQ_CODEL_H +#define _IP_DN_SCHED_FQ_CODEL_H + +/* list of queues */ +STAILQ_HEAD(fq_codel_list, fq_codel_flow) ; + +/* fq_codel parameters including codel */ +struct dn_sch_fq_codel_parms { + struct dn_aqm_codel_parms ccfg; /* CoDel Parameters */ + /* FQ_CODEL Parameters */ + uint32_t flows_cnt; /* number of flows */ + uint32_t limit; /* hard limit of fq_codel queue size*/ + uint32_t quantum; +}; /* defaults */ + +/* flow (sub-queue) stats */ +struct flow_stats { + uint64_t tot_pkts; /* statistics counters */ + uint64_t tot_bytes; + uint32_t length; /* Queue length, in packets */ + uint32_t len_bytes; /* Queue length, in bytes */ + uint32_t drops; +}; + +/* A flow of packets (sub-queue).*/ +struct fq_codel_flow { + struct mq mq; /* list of packets */ + struct flow_stats stats; /* statistics */ + int deficit; + int active; /* 1: flow is active (in a list) */ + struct codel_status cst; + STAILQ_ENTRY(fq_codel_flow) flowchain; +}; + +/* extra fq_codel scheduler configurations */ +struct fq_codel_schk { + struct dn_sch_fq_codel_parms cfg; +}; + +/* fq_codel scheduler instance */ +struct fq_codel_si { + struct dn_sch_inst _si; /* standard scheduler instance */ + struct dn_queue main_q; /* main queue is after si directly */ + + struct fq_codel_flow *flows; /* array of flows (queues) */ + uint32_t perturbation; /* random value */ + struct fq_codel_list newflows; /* list of new queues */ + struct fq_codel_list oldflows; /* list of old queues */ +}; + +/* Helper function to update queue&main-queue and scheduler statistics. + * negative len + drop -> drop + * negative len -> dequeue + * positive len -> enqueue + * positive len + drop -> drop during enqueue + */ +__inline static void +fq_update_stats(struct fq_codel_flow *q, struct fq_codel_si *si, int len, + int drop) +{ + int inc = 0; + + if (len < 0) + inc = -1; + else if (len > 0) + inc = 1; + + if (drop) { + si->main_q.ni.drops ++; + q->stats.drops ++; + si->_si.ni.drops ++; + io_pkt_drop ++; + } + + if (!drop || (drop && len < 0)) { + /* Update stats for the main queue */ + si->main_q.ni.length += inc; + si->main_q.ni.len_bytes += len; + + /*update sub-queue stats */ + q->stats.length += inc; + q->stats.len_bytes += len; + + /*update scheduler instance stats */ + si->_si.ni.length += inc; + si->_si.ni.len_bytes += len; + } + + if (inc > 0) { + si->main_q.ni.tot_bytes += len; + si->main_q.ni.tot_pkts ++; + + q->stats.tot_bytes +=len; + q->stats.tot_pkts++; + + si->_si.ni.tot_bytes +=len; + si->_si.ni.tot_pkts ++; + } + +} + +/* extract the head of fq_codel sub-queue */ +__inline static struct mbuf * +fq_codel_extract_head(struct fq_codel_flow *q, aqm_time_t *pkt_ts, struct fq_codel_si *si) +{ + struct mbuf *m = q->mq.head; + + if (m == NULL) + return m; + q->mq.head = m->m_nextpkt; + + fq_update_stats(q, si, -m->m_pkthdr.len, 0); + + if (si->main_q.ni.length == 0) /* queue is now idle */ + si->main_q.q_time = dn_cfg.curr_time; + + /* extract packet timestamp*/ + struct m_tag *mtag; + mtag = m_tag_locate(m, MTAG_ABI_COMPAT, DN_AQM_MTAG_TS, NULL); + if (mtag == NULL){ + D("timestamp tag is not found!"); + *pkt_ts = 0; + } else { + *pkt_ts = *(aqm_time_t *)(mtag + 1); + m_tag_delete(m,mtag); + } + + return m; +} + + +#endif |