sch_hfsc.c revision 9f9afec48221fe4a19f84a9341f5b304bf7d7783
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 2003 Patrick McHardy, <kaber@trash.net> 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modify it under the terms of the GNU General Public License 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation; either version 2 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the License, or (at your option) any later version. 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2003-10-17 - Ported from altq 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Permission to use, copy, modify, and distribute this software and 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * its documentation is hereby granted (including for commercial or 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for-profit use), provided that both the copyright notice and this 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * permission notice appear in all copies of the software, derivative 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * works, or modified versions, and any portions thereof. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE IN ITS ``AS IS'' CONDITION, AND ANY EXPRESS OR IMPLIED 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DAMAGE. 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Carnegie Mellon encourages (but does not require) users of this 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * software to return any improvements or extensions that they make, 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and to grant Carnegie Mellon the rights to redistribute these 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * changes without encumbrance. 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * H-FSC is described in Proceedings of SIGCOMM'97, 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "A Hierarchical Fair Service Curve Algorithm for Link-Sharing, 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Real-Time and Priority Service" 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by Ion Stoica, Hui Zhang, and T. S. Eugene Ng. 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Oleg Cherevko <olwi@aq.ml.com.ua> added the upperlimit for link-sharing. 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * when a class has an upperlimit, the fit-time is computed from the 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * upperlimit service curve. the link-sharing scheduler does not schedule 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a class whose fit-time exceeds the current time. 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/jiffies.h> 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/compiler.h> 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/timer.h> 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/list.h> 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rbtree.h> 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/netdevice.h> 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rtnetlink.h> 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pkt_sched.h> 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/pkt_sched.h> 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/pkt_cls.h> 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/system.h> 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/div64.h> 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HFSC_DEBUG 1 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * kernel internal service curve representation: 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * coordinates are given by 64 bit unsigned integers. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * x-axis: unit is clock count. 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y-axis: unit is byte. 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The service curve parameters are converted to the internal 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * representation. The slope values are scaled to avoid overflow. 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the inverse slope values as well as the y-projection of the 1st 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * segment are kept in order to to avoid 64-bit divide operations 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that are expensive on 32-bit architectures. 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct internal_sc 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm1; /* scaled slope of the 1st segment */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism1; /* scaled inverse-slope of the 1st segment */ 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; /* the x-projection of the 1st segment */ 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dy; /* the y-projection of the 1st segment */ 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm2; /* scaled slope of the 2nd segment */ 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism2; /* scaled inverse-slope of the 2nd segment */ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* runtime service curve */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct runtime_sc 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; /* current starting position on x-axis */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; /* current starting position on y-axis */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm1; /* scaled slope of the 1st segment */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism1; /* scaled inverse-slope of the 1st segment */ 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; /* the x-projection of the 1st segment */ 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dy; /* the y-projection of the 1st segment */ 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm2; /* scaled slope of the 2nd segment */ 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism2; /* scaled inverse-slope of the 2nd segment */ 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum hfsc_class_flags 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_RSC = 0x1, 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_FSC = 0x2, 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_USC = 0x4 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct hfsc_class 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 classid; /* class id */ 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int refcnt; /* usage count */ 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_basic bstats; 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_queue qstats; 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_rate_est rate_est; 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t *stats_lock; 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int level; /* class level in hierarchy */ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_proto *filter_list; /* filter list */ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int filter_cnt; /* filter count */ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *sched; /* scheduler data */ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl_parent; /* parent class */ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head siblings; /* sibling classes */ 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head children; /* child classes */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Qdisc *qdisc; /* leaf qdisc */ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node el_node; /* qdisc's eligible tree member */ 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root vt_tree; /* active children sorted by cl_vt */ 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node vt_node; /* parent's vt_tree member */ 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root cf_tree; /* active children sorted by cl_f */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node cf_node; /* parent's cf_heap member */ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head hlist; /* hash list member */ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head dlist; /* drop list member */ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_total; /* total work in bytes */ 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cumul; /* cumulative work in bytes done by 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds real-time criteria */ 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_d; /* deadline*/ 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_e; /* eligible time */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vt; /* virtual time */ 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_f; /* time when this class will fit for 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link-sharing, max(myf, cfmin) */ 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_myf; /* my fit-time (calculated from this 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class's own upperlimit curve) */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_myfadj; /* my fit-time adjustment (to cancel 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds history dependence) */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cfmin; /* earliest children's fit-time (used 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds with cl_myf to obtain cl_f) */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtmin; /* minimal virtual time among the 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds children fit for link-sharing 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (monotonic within a period) */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vtadj; /* intra-period cumulative vt 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adjustment */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vtoff; /* inter-period cumulative vt offset */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtmax; /* max child's vt in the last period */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtoff; /* cumulative cvtmax of all periods */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_pcvtoff; /* parent's cvtoff at initalization 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds time */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_rsc; /* internal real-time service curve */ 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_fsc; /* internal fair service curve */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_usc; /* internal upperlimit service curve */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_deadline; /* deadline curve */ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_eligible; /* eligible curve */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_virtual; /* virtual curve */ 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_ulimit; /* upperlimit curve */ 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_flags; /* which curves are valid */ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_vtperiod; /* vt period sequence number */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_parentperiod;/* parent's vt period sequence number*/ 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_nactive; /* number of active children */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HFSC_HSIZE 16 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct hfsc_sched 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 defcls; /* default class id */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class root; /* root class */ 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head clhash[HFSC_HSIZE]; /* class hash */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root eligible; /* eligible tree */ 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head droplist; /* active leaf class list (for 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dropping) */ 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff_head requeue; /* requeued packet */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct timer_list wd_timer; /* watchdog timer */ 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * macros 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_SCH_CLK_GETTIMEOFDAY 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/time.h> 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef PSCHED_GET_TIME 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define PSCHED_GET_TIME(stamp) \ 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdo { \ 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct timeval tv; \ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_gettimeofday(&tv); \ 210538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy (stamp) = 1ULL * USEC_PER_SEC * tv.tv_sec + tv.tv_usec; \ 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} while (0) 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if HFSC_DEBUG 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASSERT(cond) \ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdo { \ 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(!(cond))) \ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("assertion %s failed at %s:%i (%s)\n", \ 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds #cond, __FILE__, __LINE__, __FUNCTION__); \ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} while (0) 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASSERT(cond) 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* HFSC_DEBUG */ 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HT_INFINITY 0xffffffffffffffffULL /* infinite time value */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * eligible tree holds backlogged classes being sorted by their eligible times. 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there is one eligible tree per hfsc instance. 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_insert(struct hfsc_class *cl) 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->sched->eligible.rb_node; 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, el_node); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_e >= cl1->cl_e) 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->el_node, parent, p); 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->el_node, &cl->sched->eligible); 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_remove(struct hfsc_class *cl) 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->el_node, &cl->sched->eligible); 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_update(struct hfsc_class *cl) 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_remove(cl); 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_insert(cl); 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* find the class with the minimum deadline among the eligible classes */ 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_get_mindl(struct hfsc_sched *q, u64 cur_time) 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p, *cl = NULL; 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (n = rb_first(&q->eligible); n != NULL; n = rb_next(n)) { 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, el_node); 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p->cl_e > cur_time) 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL || p->cl_d < cl->cl_d) 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = p; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* find the class with minimum eligible time among the eligible classes */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_get_minel(struct hfsc_sched *q) 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rb_first(&q->eligible); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n == NULL) 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rb_entry(n, struct hfsc_class, el_node); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vttree holds holds backlogged child classes being sorted by their virtual 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * time. each intermediate class has one vttree. 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_insert(struct hfsc_class *cl) 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->cl_parent->vt_tree.rb_node; 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, vt_node); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt >= cl1->cl_vt) 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->vt_node, parent, p); 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->vt_node, &cl->cl_parent->vt_tree); 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_remove(struct hfsc_class *cl) 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->vt_node, &cl->cl_parent->vt_tree); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_update(struct hfsc_class *cl) 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_remove(cl); 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_insert(cl); 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_firstfit(struct hfsc_class *cl, u64 cur_time) 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (n = rb_first(&cl->vt_tree); n != NULL; n = rb_next(n)) { 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, vt_node); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p->cl_f <= cur_time) 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * get the leaf class with the minimum vt in the hierarchy 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct hfsc_class * 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_get_minvt(struct hfsc_class *cl, u64 cur_time) 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if root-class's cfmin is bigger than cur_time nothing to do */ 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_cfmin > cur_time) 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (cl->level > 0) { 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = vttree_firstfit(cl, cur_time); 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update parent's cl_cvtmin. 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_cvtmin < cl->cl_vt) 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmin = cl->cl_vt; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_insert(struct hfsc_class *cl) 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->cl_parent->cf_tree.rb_node; 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, cf_node); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_f >= cl1->cl_f) 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->cf_node, parent, p); 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->cf_node, &cl->cl_parent->cf_tree); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_remove(struct hfsc_class *cl) 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->cf_node, &cl->cl_parent->cf_tree); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_update(struct hfsc_class *cl) 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_remove(cl); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_insert(cl); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve support functions 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * external service curve parameters 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * m: bps 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * d: us 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * internal service curve parameters 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sm: (bytes/psched_us) << SM_SHIFT 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ism: (psched_us/byte) << ISM_SHIFT 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dx: psched_us 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Clock source resolution (CONFIG_NET_SCH_CLK_*) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * JIFFIES: for 48<=HZ<=1534 resolution is between 0.63us and 1.27us. 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CPU: resolution is between 0.5us and 1us. 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GETTIMEOFDAY: resolution is exactly 1us. 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sm and ism are scaled in order to keep effective digits. 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SM_SHIFT and ISM_SHIFT are selected to keep at least 4 effective 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * digits in decimal using the following table. 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Note: We can afford the additional accuracy (altq hfsc keeps at most 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3 effective digits) thanks to the fact that linux clock is bounded 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * much more tightly. 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bits/sec 100Kbps 1Mbps 10Mbps 100Mbps 1Gbps 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ------------+------------------------------------------------------- 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bytes/0.5us 6.25e-3 62.5e-3 625e-3 6250e-e 62500e-3 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bytes/us 12.5e-3 125e-3 1250e-3 12500e-3 125000e-3 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bytes/1.27us 15.875e-3 158.75e-3 1587.5e-3 15875e-3 158750e-3 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 0.5us/byte 160 16 1.6 0.16 0.016 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * us/byte 80 8 0.8 0.08 0.008 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1.27us/byte 63 6.3 0.63 0.063 0.0063 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SM_SHIFT 20 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ISM_SHIFT 18 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SM_MASK ((1ULL << SM_SHIFT) - 1) 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ISM_MASK ((1ULL << ISM_SHIFT) - 1) 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u64 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsseg_x2y(u64 x, u64 sm) 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y = x * sm >> SM_SHIFT 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but divide it for the upper and lower bits to avoid overflow 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = (x >> SM_SHIFT) * sm + (((x & SM_MASK) * sm) >> SM_SHIFT); 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return y; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u64 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsseg_y2x(u64 y, u64 ism) 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y == 0) 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = 0; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ism == HT_INFINITY) 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = HT_INFINITY; 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = (y >> ISM_SHIFT) * ism 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + (((y & ISM_MASK) * ism) >> ISM_SHIFT); 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return x; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Convert m (bps) into sm (bytes/psched us) */ 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsm2sm(u32 m) 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm; 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sm = ((u64)m << SM_SHIFT); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sm += PSCHED_JIFFIE2US(HZ) - 1; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(sm, PSCHED_JIFFIE2US(HZ)); 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sm; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert m (bps) into ism (psched us/byte) */ 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsm2ism(u32 m) 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (m == 0) 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ism = HT_INFINITY; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ism = ((u64)PSCHED_JIFFIE2US(HZ) << ISM_SHIFT); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ism += m - 1; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(ism, m); 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ism; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert d (us) into dx (psched us) */ 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsd2dx(u32 d) 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dx = ((u64)d * PSCHED_JIFFIE2US(HZ)); 504538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy dx += USEC_PER_SEC - 1; 505538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy do_div(dx, USEC_PER_SEC); 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dx; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert sm (bytes/psched us) into m (bps) */ 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssm2m(u64 sm) 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 m; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds m = (sm * PSCHED_JIFFIE2US(HZ)) >> SM_SHIFT; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (u32)m; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert dx (psched us) into d (us) */ 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdx2d(u64 dx) 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 d; 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 525538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy d = dx * USEC_PER_SEC; 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(d, PSCHED_JIFFIE2US(HZ)); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (u32)d; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssc2isc(struct tc_service_curve *sc, struct internal_sc *isc) 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->sm1 = m2sm(sc->m1); 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->ism1 = m2ism(sc->m1); 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->dx = d2dx(sc->d); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->dy = seg_x2y(isc->dx, isc->sm1); 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->sm2 = m2sm(sc->m2); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->ism2 = m2ism(sc->m2); 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * initialize the runtime service curve with the given internal 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve starting at (x, y). 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_init(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->sm1 = isc->sm1; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->ism1 = isc->ism1; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = isc->dx; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = isc->dy; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->sm2 = isc->sm2; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->ism2 = isc->ism2; 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * calculate the y-projection of the runtime service curve by the 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * given x-projection value 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_y2x(struct runtime_sc *rtsc, u64 y) 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y < rtsc->y) 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x; 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (y <= rtsc->y + rtsc->dy) { 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* x belongs to the 1st segment */ 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rtsc->dy == 0) 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + rtsc->dx; 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + seg_y2x(y - rtsc->y, rtsc->ism1); 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* x belongs to the 2nd segment */ 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + rtsc->dx 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + seg_y2x(y - rtsc->y - rtsc->dy, rtsc->ism2); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return x; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_x2y(struct runtime_sc *rtsc, u64 x) 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (x <= rtsc->x) 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (x <= rtsc->x + rtsc->dx) 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* y belongs to the 1st segment */ 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y + seg_x2y(x - rtsc->x, rtsc->sm1); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* y belongs to the 2nd segment */ 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y + rtsc->dy 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + seg_x2y(x - rtsc->x - rtsc->dx, rtsc->sm2); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return y; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update the runtime service curve by taking the minimum of the current 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * runtime service curve and the service curve starting at (x, y). 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_min(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y1, y2, dx, dy; 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 dsm; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isc->sm1 <= isc->sm2) { 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* service curve is convex */ 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y1 = rtsc_x2y(rtsc, x); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y1 < y) 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* the current rtsc is smaller */ 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve is concave 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute the two y values of the current rtsc 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y1: at x 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y2: at (x + dx) 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y1 = rtsc_x2y(rtsc, x); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y1 <= y) { 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* rtsc is below isc, no change to rtsc */ 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y2 = rtsc_x2y(rtsc, x + isc->dx); 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y2 >= y + isc->dy) { 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* rtsc is above isc, replace rtsc by isc */ 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = isc->dx; 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = isc->dy; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the two curves intersect 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute the offsets (dx, dy) using the reverse 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * function of seg_x2y() 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * seg_x2y(dx, sm1) == seg_x2y(dx, sm2) + (y1 - y) 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dx = (y1 - y) << SM_SHIFT; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dsm = isc->sm1 - isc->sm2; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(dx, dsm); 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if (x, y1) belongs to the 1st segment of rtsc. 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if so, add the offset. 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rtsc->x + rtsc->dx > x) 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dx += rtsc->x + rtsc->dx - x; 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dy = seg_x2y(dx, isc->sm1); 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = dx; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = dy; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsinit_ed(struct hfsc_class *cl, unsigned int next_len) 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PSCHED_GET_TIME(cur_time); 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the deadline curve */ 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update the eligible curve. 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for concave, it is equal to the deadline curve. 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for convex, it is a linear curve with slope m2. 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible = cl->cl_deadline; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dx = 0; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dy = 0; 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* compute e and d */ 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_insert(cl); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_ed(struct hfsc_class *cl, unsigned int next_len) 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_update(cl); 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_d(struct hfsc_class *cl, unsigned int next_len) 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_cfmin(struct hfsc_class *cl) 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n = rb_first(&cl->cf_tree); 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n == NULL) { 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = 0; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, cf_node); 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = p->cl_f; 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsinit_vf(struct hfsc_class *cl, unsigned int len) 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *max_cl; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 vt, f, cur_time; 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int go_active; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cur_time = 0; 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 1; 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (; cl->cl_parent != NULL; cl = cl->cl_parent) { 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_active && cl->cl_nactive++ == 0) 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 1; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 0; 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_active) { 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rb_last(&cl->cl_parent->vt_tree); 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n != NULL) { 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_cl = rb_entry(n, struct hfsc_class,vt_node); 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set vt to the average of the min and max 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * classes. if the parent's period didn't 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * change, don't decrease vt of the class. 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = max_cl->cl_vt; 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_cvtmin != 0) 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = (cl->cl_parent->cl_cvtmin + vt)/2; 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_vtperiod != 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod || vt > cl->cl_vt) 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = vt; 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * first child for a new parent backlog period. 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * add parent's cvtmax to cvtoff to make a new 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vt (vtoff + vt) larger than the vt in the 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * last period for all children. 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = cl->cl_parent->cl_cvtmax; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtoff += vt; 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmax = 0; 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmin = 0; 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = 0; 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = cl->cl_parent->cl_cvtoff - 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff; 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the virtual curve */ 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = cl->cl_vt + cl->cl_vtoff; 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_virtual, &cl->cl_fsc, vt, 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total); 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_virtual.x == vt) { 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_virtual.x -= cl->cl_vtoff; 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = 0; 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj = 0; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtperiod++; /* increment vt period */ 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod = cl->cl_parent->cl_vtperiod; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_nactive == 0) 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod++; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = 0; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_insert(cl); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_insert(cl); 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) { 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* class has upper limit curve */ 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cur_time == 0) 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PSCHED_GET_TIME(cur_time); 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the ulimit curve */ 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_ulimit, &cl->cl_usc, cur_time, 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total); 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* compute myf */ 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = rtsc_y2x(&cl->cl_ulimit, 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total); 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj = 0; 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds f = max(cl->cl_myf, cl->cl_cfmin); 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (f != cl->cl_f) { 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = f; 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_update(cl); 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_vf(struct hfsc_class *cl, unsigned int len, u64 cur_time) 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 f; /* , myf_bound, delta; */ 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int go_passive = 0; 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 0 && cl->cl_flags & HFSC_FSC) 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 1; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (; cl->cl_parent != NULL; cl = cl->cl_parent) { 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total += len; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(cl->cl_flags & HFSC_FSC) || cl->cl_nactive == 0) 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_passive && --cl->cl_nactive == 0) 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 1; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 0; 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_passive) { 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* no more active child, going passive */ 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update cvtmax of the parent class */ 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt > cl->cl_parent->cl_cvtmax) 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmax = cl->cl_vt; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* remove this class from the vt tree */ 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_remove(cl); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_remove(cl); 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update vt and f 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = rtsc_y2x(&cl->cl_virtual, cl->cl_total) 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds - cl->cl_vtoff + cl->cl_vtadj; 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if vt of the class is smaller than cvtmin, 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the class was skipped in the past due to non-fit. 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if so, we need to adjust vtadj. 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt < cl->cl_parent->cl_cvtmin) { 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj += cl->cl_parent->cl_cvtmin - cl->cl_vt; 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = cl->cl_parent->cl_cvtmin; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the vt tree */ 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_update(cl); 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) { 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = cl->cl_myfadj + rtsc_y2x(&cl->cl_ulimit, 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total); 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code causes classes to stay way under their 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * limit when multiple classes are used at gigabit 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * speed. needs investigation. -kaber 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if myf lags behind by more than one clock tick 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from the current time, adjust myfadj to prevent 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a rate-limited class from going greedy. 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in a steady state under rate-limiting, myf 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fluctuates within one clock tick. 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds myf_bound = cur_time - PSCHED_JIFFIE2US(1); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_myf < myf_bound) { 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds delta = cur_time - cl->cl_myf; 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj += delta; 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf += delta; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds f = max(cl->cl_myf, cl->cl_cfmin); 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (f != cl->cl_f) { 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = f; 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_update(cl); 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsset_active(struct hfsc_class *cl, unsigned int len) 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_ed(cl, len); 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_vf(cl, len); 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&cl->dlist, &cl->sched->droplist); 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsset_passive(struct hfsc_class *cl) 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_remove(cl); 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&cl->dlist); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vttree is now handled in update_vf() so that update_vf(cl, 0, 0) 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * needs to be called explicitly to remove a class from vttree. 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * hack to get length of first packet in queue. 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsqdisc_peek_len(struct Qdisc *sch) 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *skb; 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb = sch->dequeue(sch); 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (skb == NULL) { 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (net_ratelimit()) 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("qdisc_peek_len: non work-conserving qdisc ?\n"); 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = skb->len; 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(sch->ops->requeue(skb, sch) != NET_XMIT_SUCCESS)) { 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (net_ratelimit()) 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("qdisc_peek_len: failed to requeue\n"); 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_purge_queue(struct Qdisc *sch, struct hfsc_class *cl) 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len = cl->qdisc->q.qlen; 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_reset(cl->qdisc); 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (len > 0) { 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, 0, 0); 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_passive(cl); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen -= len; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_adjust_levels(struct hfsc_class *cl) 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int level; 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds level = 0; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(p, &cl->children, siblings) { 976210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy if (p->level >= level) 977210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy level = p->level + 1; 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 979210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy cl->level = level; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } while ((cl = cl->cl_parent) != NULL); 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline unsigned int 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_hash(u32 h) 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds h ^= h >> 8; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds h ^= h >> 4; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return h & (HFSC_HSIZE - 1); 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_find_class(u32 classid, struct Qdisc *sch) 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(cl, &q->clhash[hfsc_hash(classid)], hlist) { 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->classid == classid) 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_rsc(struct hfsc_class *cl, struct tc_service_curve *rsc, 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time) 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(rsc, &cl->cl_rsc); 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible = cl->cl_deadline; 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dx = 0; 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dy = 0; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_RSC; 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_fsc(struct hfsc_class *cl, struct tc_service_curve *fsc) 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(fsc, &cl->cl_fsc); 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_virtual, &cl->cl_fsc, cl->cl_vt, cl->cl_total); 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_FSC; 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_usc(struct hfsc_class *cl, struct tc_service_curve *usc, 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time) 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(usc, &cl->cl_usc); 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_ulimit, &cl->cl_usc, cur_time, cl->cl_total); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_USC; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid, 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rtattr **tca, unsigned long *arg) 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)*arg; 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *parent = NULL; 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rtattr *opt = tca[TCA_OPTIONS-1]; 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rtattr *tb[TCA_HFSC_MAX]; 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL; 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time; 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (opt == NULL || rtattr_parse_nested(tb, TCA_HFSC_MAX, opt)) 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tb[TCA_HFSC_RSC-1]) { 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (RTA_PAYLOAD(tb[TCA_HFSC_RSC-1]) < sizeof(*rsc)) 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rsc = RTA_DATA(tb[TCA_HFSC_RSC-1]); 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc->m1 == 0 && rsc->m2 == 0) 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rsc = NULL; 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tb[TCA_HFSC_FSC-1]) { 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (RTA_PAYLOAD(tb[TCA_HFSC_FSC-1]) < sizeof(*fsc)) 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsc = RTA_DATA(tb[TCA_HFSC_FSC-1]); 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc->m1 == 0 && fsc->m2 == 0) 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsc = NULL; 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tb[TCA_HFSC_USC-1]) { 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (RTA_PAYLOAD(tb[TCA_HFSC_USC-1]) < sizeof(*usc)) 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usc = RTA_DATA(tb[TCA_HFSC_USC-1]); 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc->m1 == 0 && usc->m2 == 0) 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usc = NULL; 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) { 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid) { 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent && cl->cl_parent->classid != parentid) 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent == NULL && parentid != TC_H_ROOT) 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PSCHED_GET_TIME(cur_time); 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc != NULL) 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_rsc(cl, rsc, cur_time); 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc != NULL) 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_fsc(cl, fsc); 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc != NULL) 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_usc(cl, usc, cur_time); 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen != 0) { 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_ed(cl, qdisc_peek_len(cl->qdisc)); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, 0, cur_time); 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_ESTIMATOR 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tca[TCA_RATE-1]) 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gen_replace_estimator(&cl->bstats, &cl->rate_est, 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->stats_lock, tca[TCA_RATE-1]); 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid == TC_H_ROOT) 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EEXIST; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = &q->root; 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid) { 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = hfsc_find_class(parentid, sch); 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parent == NULL) 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (classid == 0 || TC_H_MAJ(classid ^ sch->handle) != 0) 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hfsc_find_class(classid, sch)) 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EEXIST; 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc == NULL && fsc == NULL) 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11260da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris cl = kzalloc(sizeof(struct hfsc_class), GFP_KERNEL); 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOBUFS; 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc != NULL) 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_rsc(cl, rsc, 0); 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc != NULL) 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_fsc(cl, fsc); 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc != NULL) 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_usc(cl, usc, 0); 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->refcnt = 1; 11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->classid = classid; 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->sched = q; 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent = parent; 11419f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy cl->qdisc = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, classid); 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc == NULL) 11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qdisc = &noop_qdisc; 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->stats_lock = &sch->dev->queue_lock; 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&cl->children); 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->vt_tree = RB_ROOT; 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cf_tree = RB_ROOT; 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&cl->hlist, &q->clhash[hfsc_hash(classid)]); 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&cl->siblings, &parent->children); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parent->level == 0) 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, parent); 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_adjust_levels(parent); 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff = parent->cl_cvtoff; 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_ESTIMATOR 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (tca[TCA_RATE-1]) 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gen_new_estimator(&cl->bstats, &cl->rate_est, 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->stats_lock, tca[TCA_RATE-1]); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *arg = (unsigned long)cl; 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_destroy_filters(struct tcf_proto **fl) 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_proto *tp; 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while ((tp = *fl) != NULL) { 11731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *fl = tp->next; 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcf_destroy(tp); 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_destroy_class(struct Qdisc *sch, struct hfsc_class *cl) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_filters(&cl->filter_list); 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_destroy(cl->qdisc); 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_ESTIMATOR 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gen_kill_estimator(&cl->bstats, &cl->rate_est); 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != &q->root) 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cl); 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_delete_class(struct Qdisc *sch, unsigned long arg) 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level > 0 || cl->filter_cnt > 0 || cl == &q->root) 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&cl->hlist); 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&cl->siblings); 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_adjust_levels(cl->cl_parent); 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, cl); 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (--cl->refcnt == 0) 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_class(sch, cl); 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct hfsc_class * 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_result res; 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_proto *tcf; 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (TC_H_MAJ(skb->priority ^ sch->handle) == 0 && 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (cl = hfsc_find_class(skb->priority, sch)) != NULL) 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 122829f1df6cc1c3ee3530939f0e38d80a9b50645ba5Jamal Hadi Salim *qerr = NET_XMIT_BYPASS; 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcf = q->root.filter_list; 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (tcf && (result = tc_classify(skb, tcf, &res)) >= 0) { 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_CLS_ACT 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (result) { 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TC_ACT_QUEUED: 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TC_ACT_STOLEN: 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *qerr = NET_XMIT_SUCCESS; 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TC_ACT_SHOT: 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#elif defined(CONFIG_NET_CLS_POLICE) 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (result == TC_POLICE_SHOT) 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = (struct hfsc_class *)res.class) == NULL) { 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = hfsc_find_class(res.classid, sch)) == NULL) 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; /* filter selected invalid classid */ 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; /* hit leaf class */ 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* apply inner filter chain */ 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcf = cl->filter_list; 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* classification failed, try default class */ 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = hfsc_find_class(TC_H_MAKE(TC_H_MAJ(sch->handle), q->defcls), sch); 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL || cl->level > 0) 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_graft_class(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Qdisc **old) 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level > 0) 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) { 12749f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy new = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, 12759f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy cl->classid); 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new = &noop_qdisc; 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, cl); 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *old = xchg(&cl->qdisc, new); 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct Qdisc * 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_class_leaf(struct Qdisc *sch, unsigned long arg) 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL && cl->level == 0) 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl->qdisc; 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned long 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_get_class(struct Qdisc *sch, u32 classid) 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = hfsc_find_class(classid, sch); 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->refcnt++; 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (unsigned long)cl; 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_put_class(struct Qdisc *sch, unsigned long arg) 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (--cl->refcnt == 0) 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_class(sch, cl); 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned long 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_bind_tcf(struct Qdisc *sch, unsigned long parent, u32 classid) 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p = (struct hfsc_class *)parent; 13221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = hfsc_find_class(classid, sch); 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) { 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p != NULL && p->level <= cl->level) 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->filter_cnt++; 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (unsigned long)cl; 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_unbind_tcf(struct Qdisc *sch, unsigned long arg) 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->filter_cnt--; 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct tcf_proto ** 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_tcf_chain(struct Qdisc *sch, unsigned long arg) 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = &q->root; 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cl->filter_list; 13511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_sc(struct sk_buff *skb, int attr, struct internal_sc *sc) 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_service_curve tsc; 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.m1 = sm2m(sc->sm1); 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.d = dx2d(sc->dx); 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.m2 = sm2m(sc->sm2); 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RTA_PUT(skb, attr, sizeof(tsc), &tsc); 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtattr_failure: 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_curves(struct sk_buff *skb, struct hfsc_class *cl) 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_RSC) && 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_RSC, &cl->cl_rsc) < 0)) 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rtattr_failure; 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_FSC) && 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_FSC, &cl->cl_fsc) < 0)) 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rtattr_failure; 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_USC) && 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_USC, &cl->cl_usc) < 0)) 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rtattr_failure; 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtattr_failure: 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_class(struct Qdisc *sch, unsigned long arg, struct sk_buff *skb, 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcmsg *tcm) 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *b = skb->tail; 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rtattr *rta = (struct rtattr *)b; 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcm->tcm_parent = cl->cl_parent ? cl->cl_parent->classid : TC_H_ROOT; 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcm->tcm_handle = cl->classid; 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcm->tcm_info = cl->qdisc->handle; 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RTA_PUT(skb, TCA_OPTIONS, 0, NULL); 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hfsc_dump_curves(skb, cl) < 0) 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto rtattr_failure; 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rta->rta_len = skb->tail - b; 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtattr_failure: 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb_trim(skb, b - skb->data); 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_class_stats(struct Qdisc *sch, unsigned long arg, 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_dump *d) 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_stats xstats; 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qstats.qlen = cl->qdisc->q.qlen; 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.level = cl->level; 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.period = cl->cl_vtperiod; 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.work = cl->cl_total; 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.rtwork = cl->cl_cumul; 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gnet_stats_copy_basic(d, &cl->bstats) < 0 || 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_ESTIMATOR 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 || 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gnet_stats_copy_queue(d, &cl->qstats) < 0) 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gnet_stats_copy_app(d, &xstats, sizeof(xstats)); 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_walk(struct Qdisc *sch, struct qdisc_walker *arg) 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->stop) 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < HFSC_HSIZE; i++) { 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(cl, &q->clhash[i], hlist) { 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->count < arg->skip) { 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->count++; 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 14541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->fn(sch, (unsigned long)cl, arg) < 0) { 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->stop = 1; 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->count++; 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_watchdog(unsigned long arg) 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Qdisc *sch = (struct Qdisc *)arg; 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->flags &= ~TCQ_F_THROTTLED; 14701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds netif_schedule(sch->dev); 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_schedule_watchdog(struct Qdisc *sch, u64 cur_time) 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 next_time = 0; 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long delay; 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = eltree_get_minel(q)) != NULL) 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_time = cl->cl_e; 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (q->root.cl_cfmin != 0) { 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (next_time == 0 || next_time > q->root.cl_cfmin) 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_time = q->root.cl_cfmin; 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ASSERT(next_time != 0); 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds delay = next_time - cur_time; 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds delay = PSCHED_US2JIFFIE(delay); 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->flags |= TCQ_F_THROTTLED; 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_timer(&q->wd_timer, jiffies + delay); 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_init_qdisc(struct Qdisc *sch, struct rtattr *opt) 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt *qopt; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (opt == NULL || RTA_PAYLOAD(opt) < sizeof(*qopt)) 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qopt = RTA_DATA(opt); 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->stats_lock = &sch->dev->queue_lock; 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->defcls = qopt->defcls; 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < HFSC_HSIZE; i++) 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->clhash[i]); 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->eligible = RB_ROOT; 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->droplist); 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb_queue_head_init(&q->requeue); 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.refcnt = 1; 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.classid = sch->handle; 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.sched = q; 15189f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy q->root.qdisc = qdisc_create_dflt(sch->dev, &pfifo_qdisc_ops, 15199f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy sch->handle); 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (q->root.qdisc == NULL) 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.qdisc = &noop_qdisc; 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.stats_lock = &sch->dev->queue_lock; 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->root.children); 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.vt_tree = RB_ROOT; 15251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.cf_tree = RB_ROOT; 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add(&q->root.hlist, &q->clhash[hfsc_hash(q->root.classid)]); 15281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_timer(&q->wd_timer); 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->wd_timer.function = hfsc_watchdog; 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->wd_timer.data = (unsigned long)sch; 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 15341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_qdisc(struct Qdisc *sch, struct rtattr *opt) 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt *qopt; 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (opt == NULL || RTA_PAYLOAD(opt) < sizeof(*qopt)) 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qopt = RTA_DATA(opt); 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->defcls = qopt->defcls; 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_reset_class(struct hfsc_class *cl) 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total = 0; 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cumul = 0; 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = 0; 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = 0; 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = 0; 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj = 0; 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = 0; 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtmin = 0; 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtmax = 0; 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtoff = 0; 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff = 0; 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtperiod = 0; 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod = 0; 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = 0; 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = 0; 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj = 0; 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = 0; 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_nactive = 0; 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->vt_tree = RB_ROOT; 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cf_tree = RB_ROOT; 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_reset(cl->qdisc); 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_deadline, &cl->cl_rsc, 0, 0); 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_virtual, &cl->cl_fsc, 0, 0); 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_ulimit, &cl->cl_usc, 0, 0); 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_reset_qdisc(struct Qdisc *sch) 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < HFSC_HSIZE; i++) { 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(cl, &q->clhash[i], hlist) 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_reset_class(cl); 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __skb_queue_purge(&q->requeue); 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->eligible = RB_ROOT; 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->droplist); 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&q->wd_timer); 16021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->flags &= ~TCQ_F_THROTTLED; 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen = 0; 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_destroy_qdisc(struct Qdisc *sch) 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl, *next; 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < HFSC_HSIZE; i++) { 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry_safe(cl, next, &q->clhash[i], hlist) 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_class(sch, cl); 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __skb_queue_purge(&q->requeue); 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds del_timer(&q->wd_timer); 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_qdisc(struct Qdisc *sch, struct sk_buff *skb) 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char *b = skb->tail; 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt qopt; 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qopt.defcls = q->defcls; 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds RTA_PUT(skb, TCA_OPTIONS, sizeof(qopt), &qopt); 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtattr_failure: 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb_trim(skb, b - skb->data); 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch) 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int err; 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = hfsc_classify(skb, sch, &err); 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) { 164629f1df6cc1c3ee3530939f0e38d80a9b50645ba5Jamal Hadi Salim if (err == NET_XMIT_BYPASS) 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.drops++; 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree_skb(skb); 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = skb->len; 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = cl->qdisc->enqueue(skb, cl->qdisc); 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(err != NET_XMIT_SUCCESS)) { 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qstats.drops++; 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.drops++; 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 1) 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_active(cl, len); 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->bstats.packets++; 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->bstats.bytes += len; 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->bstats.packets++; 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->bstats.bytes += len; 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen++; 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NET_XMIT_SUCCESS; 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct sk_buff * 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dequeue(struct Qdisc *sch) 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *skb; 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int next_len; 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int realtime = 0; 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sch->q.qlen == 0) 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((skb = __skb_dequeue(&q->requeue))) 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PSCHED_GET_TIME(cur_time); 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if there are eligible classes, use real-time criteria. 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * find the class with the minimum deadline among 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the eligible classes. 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = eltree_get_mindl(q, cur_time)) != NULL) { 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds realtime = 1; 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * use link-sharing criteria 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * get the class with the minimum vt in the hierarchy 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = vttree_get_minvt(&q->root, cur_time); 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) { 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.overlimits++; 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_schedule_watchdog(sch, cur_time); 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds skb = cl->qdisc->dequeue(cl->qdisc); 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (skb == NULL) { 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (net_ratelimit()) 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk("HFSC: Non-work-conserving qdisc ?\n"); 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, skb->len, cur_time); 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (realtime) 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cumul += skb->len; 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen != 0) { 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) { 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update ed */ 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_len = qdisc_peek_len(cl->qdisc); 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (realtime) 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_ed(cl, next_len); 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_d(cl, next_len); 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* the class becomes passive */ 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_passive(cl); 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds out: 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->flags &= ~TCQ_F_THROTTLED; 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen--; 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb; 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_requeue(struct sk_buff *skb, struct Qdisc *sch) 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __skb_queue_head(&q->requeue, skb); 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen++; 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.requeues++; 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NET_XMIT_SUCCESS; 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_drop(struct Qdisc *sch) 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(cl, &q->droplist, dlist) { 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->ops->drop != NULL && 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (len = cl->qdisc->ops->drop(cl->qdisc)) > 0) { 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 0) { 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, 0, 0); 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_passive(cl); 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_move_tail(&cl->dlist, &q->droplist); 17671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qstats.drops++; 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.drops++; 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen--; 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct Qdisc_class_ops hfsc_class_ops = { 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .change = hfsc_change_class, 17791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .delete = hfsc_delete_class, 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .graft = hfsc_graft_class, 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .leaf = hfsc_class_leaf, 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .get = hfsc_get_class, 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .put = hfsc_put_class, 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bind_tcf = hfsc_bind_tcf, 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unbind_tcf = hfsc_unbind_tcf, 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tcf_chain = hfsc_tcf_chain, 17871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump = hfsc_dump_class, 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump_stats = hfsc_dump_class_stats, 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .walk = hfsc_walk 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct Qdisc_ops hfsc_qdisc_ops = { 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id = "hfsc", 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .init = hfsc_init_qdisc, 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .change = hfsc_change_qdisc, 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .reset = hfsc_reset_qdisc, 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = hfsc_destroy_qdisc, 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump = hfsc_dump_qdisc, 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .enqueue = hfsc_enqueue, 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dequeue = hfsc_dequeue, 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .requeue = hfsc_requeue, 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .drop = hfsc_drop, 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cl_ops = &hfsc_class_ops, 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .priv_size = sizeof(struct hfsc_sched), 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_init(void) 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return register_qdisc(&hfsc_qdisc_ops); 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_cleanup(void) 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_qdisc(&hfsc_qdisc_ops); 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(hfsc_init); 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(hfsc_cleanup); 1823