sch_hfsc.c revision 7cd0a63872ac6ef97265f07adc367ca4f984468e
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/compiler.h> 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/skbuff.h> 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/list.h> 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rbtree.h> 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rtnetlink.h> 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pkt_sched.h> 66dc5fc579b90ed0a9a4e55b0218cdbaf0a8cf2e67Arnaldo Carvalho de Melo#include <net/netlink.h> 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/pkt_sched.h> 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <net/pkt_cls.h> 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/div64.h> 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * kernel internal service curve representation: 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * coordinates are given by 64 bit unsigned integers. 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * x-axis: unit is clock count. 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y-axis: unit is byte. 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The service curve parameters are converted to the internal 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * representation. The slope values are scaled to avoid overflow. 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the inverse slope values as well as the y-projection of the 1st 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * segment are kept in order to to avoid 64-bit divide operations 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that are expensive on 32-bit architectures. 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct internal_sc 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm1; /* scaled slope of the 1st segment */ 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism1; /* scaled inverse-slope of the 1st segment */ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; /* the x-projection of the 1st segment */ 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dy; /* the y-projection of the 1st segment */ 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm2; /* scaled slope of the 2nd segment */ 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism2; /* scaled inverse-slope of the 2nd segment */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* runtime service curve */ 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct runtime_sc 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; /* current starting position on x-axis */ 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; /* current starting position on y-axis */ 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm1; /* scaled slope of the 1st segment */ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism1; /* scaled inverse-slope of the 1st segment */ 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; /* the x-projection of the 1st segment */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dy; /* the y-projection of the 1st segment */ 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm2; /* scaled slope of the 2nd segment */ 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism2; /* scaled inverse-slope of the 2nd segment */ 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum hfsc_class_flags 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_RSC = 0x1, 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_FSC = 0x2, 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds HFSC_USC = 0x4 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct hfsc_class 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 116be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct Qdisc_class_common cl_common; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int refcnt; /* usage count */ 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_basic bstats; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_queue qstats; 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_stats_rate_est rate_est; 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int level; /* class level in hierarchy */ 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_proto *filter_list; /* filter list */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int filter_cnt; /* filter count */ 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *sched; /* scheduler data */ 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl_parent; /* parent class */ 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head siblings; /* sibling classes */ 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head children; /* child classes */ 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Qdisc *qdisc; /* leaf qdisc */ 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node el_node; /* qdisc's eligible tree member */ 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root vt_tree; /* active children sorted by cl_vt */ 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node vt_node; /* parent's vt_tree member */ 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root cf_tree; /* active children sorted by cl_f */ 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node cf_node; /* parent's cf_heap member */ 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head dlist; /* drop list member */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_total; /* total work in bytes */ 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cumul; /* cumulative work in bytes done by 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds real-time criteria */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_d; /* deadline*/ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_e; /* eligible time */ 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vt; /* virtual time */ 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_f; /* time when this class will fit for 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds link-sharing, max(myf, cfmin) */ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_myf; /* my fit-time (calculated from this 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds class's own upperlimit curve) */ 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_myfadj; /* my fit-time adjustment (to cancel 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds history dependence) */ 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cfmin; /* earliest children's fit-time (used 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds with cl_myf to obtain cl_f) */ 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtmin; /* minimal virtual time among the 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds children fit for link-sharing 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (monotonic within a period) */ 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vtadj; /* intra-period cumulative vt 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds adjustment */ 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_vtoff; /* inter-period cumulative vt offset */ 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtmax; /* max child's vt in the last period */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cl_cvtoff; /* cumulative cvtmax of all periods */ 1629a94b35184bf095b885ca80099381f8547d5be3aJoe Perches u64 cl_pcvtoff; /* parent's cvtoff at initialization 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds time */ 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_rsc; /* internal real-time service curve */ 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_fsc; /* internal fair service curve */ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct internal_sc cl_usc; /* internal upperlimit service curve */ 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_deadline; /* deadline curve */ 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_eligible; /* eligible curve */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_virtual; /* virtual curve */ 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct runtime_sc cl_ulimit; /* upperlimit curve */ 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_flags; /* which curves are valid */ 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_vtperiod; /* vt period sequence number */ 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_parentperiod;/* parent's vt period sequence number*/ 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long cl_nactive; /* number of active children */ 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct hfsc_sched 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 defcls; /* default class id */ 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class root; /* root class */ 183be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct Qdisc_class_hash clhash; /* class hash */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_root eligible; /* eligible tree */ 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct list_head droplist; /* active leaf class list (for 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dropping) */ 187ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy struct qdisc_watchdog watchdog; /* watchdog timer */ 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HT_INFINITY 0xffffffffffffffffULL /* infinite time value */ 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * eligible tree holds backlogged classes being sorted by their eligible times. 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * there is one eligible tree per hfsc instance. 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_insert(struct hfsc_class *cl) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->sched->eligible.rb_node; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, el_node); 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_e >= cl1->cl_e) 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->el_node, parent, p); 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->el_node, &cl->sched->eligible); 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_remove(struct hfsc_class *cl) 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->el_node, &cl->sched->eligible); 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_update(struct hfsc_class *cl) 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_remove(cl); 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_insert(cl); 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* find the class with the minimum deadline among the eligible classes */ 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_get_mindl(struct hfsc_sched *q, u64 cur_time) 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p, *cl = NULL; 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (n = rb_first(&q->eligible); n != NULL; n = rb_next(n)) { 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, el_node); 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p->cl_e > cur_time) 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL || p->cl_d < cl->cl_d) 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = p; 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* find the class with minimum eligible time among the eligible classes */ 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldseltree_get_minel(struct hfsc_sched *q) 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 25210297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rb_first(&q->eligible); 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n == NULL) 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rb_entry(n, struct hfsc_class, el_node); 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vttree holds holds backlogged child classes being sorted by their virtual 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * time. each intermediate class has one vttree. 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_insert(struct hfsc_class *cl) 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->cl_parent->vt_tree.rb_node; 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, vt_node); 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt >= cl1->cl_vt) 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->vt_node, parent, p); 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->vt_node, &cl->cl_parent->vt_tree); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_remove(struct hfsc_class *cl) 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->vt_node, &cl->cl_parent->vt_tree); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_update(struct hfsc_class *cl) 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_remove(cl); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_insert(cl); 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_firstfit(struct hfsc_class *cl, u64 cur_time) 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (n = rb_first(&cl->vt_tree); n != NULL; n = rb_next(n)) { 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, vt_node); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p->cl_f <= cur_time) 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return p; 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * get the leaf class with the minimum vt in the hierarchy 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct hfsc_class * 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvttree_get_minvt(struct hfsc_class *cl, u64 cur_time) 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if root-class's cfmin is bigger than cur_time nothing to do */ 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_cfmin > cur_time) 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (cl->level > 0) { 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = vttree_firstfit(cl, cur_time); 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update parent's cl_cvtmin. 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_cvtmin < cl->cl_vt) 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmin = cl->cl_vt; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_insert(struct hfsc_class *cl) 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node **p = &cl->cl_parent->cf_tree.rb_node; 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *parent = NULL; 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl1; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (*p != NULL) { 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = *p; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl1 = rb_entry(parent, struct hfsc_class, cf_node); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_f >= cl1->cl_f) 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_right; 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = &parent->rb_left; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_link_node(&cl->cf_node, parent, p); 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_insert_color(&cl->cf_node, &cl->cl_parent->cf_tree); 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_remove(struct hfsc_class *cl) 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rb_erase(&cl->cf_node, &cl->cl_parent->cf_tree); 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldscftree_update(struct hfsc_class *cl) 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_remove(cl); 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_insert(cl); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve support functions 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * external service curve parameters 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * m: bps 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * d: us 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * internal service curve parameters 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sm: (bytes/psched_us) << SM_SHIFT 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ism: (psched_us/byte) << ISM_SHIFT 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dx: psched_us 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 375641b9e0e8b7f96425da6ce98f3361e3af0baee29Patrick McHardy * The clock source resolution with ktime is 1.024us. 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sm and ism are scaled in order to keep effective digits. 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SM_SHIFT and ISM_SHIFT are selected to keep at least 4 effective 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * digits in decimal using the following table. 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bits/sec 100Kbps 1Mbps 10Mbps 100Mbps 1Gbps 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ------------+------------------------------------------------------- 383641b9e0e8b7f96425da6ce98f3361e3af0baee29Patrick McHardy * bytes/1.024us 12.8e-3 128e-3 1280e-3 12800e-3 128000e-3 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 385641b9e0e8b7f96425da6ce98f3361e3af0baee29Patrick McHardy * 1.024us/byte 78.125 7.8125 0.78125 0.078125 0.0078125 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SM_SHIFT 20 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ISM_SHIFT 18 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SM_MASK ((1ULL << SM_SHIFT) - 1) 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ISM_MASK ((1ULL << ISM_SHIFT) - 1) 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u64 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsseg_x2y(u64 x, u64 sm) 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y = x * sm >> SM_SHIFT 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but divide it for the upper and lower bits to avoid overflow 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = (x >> SM_SHIFT) * sm + (((x & SM_MASK) * sm) >> SM_SHIFT); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return y; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u64 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsseg_y2x(u64 y, u64 ism) 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y == 0) 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = 0; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ism == HT_INFINITY) 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = HT_INFINITY; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = (y >> ISM_SHIFT) * ism 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + (((y & ISM_MASK) * ism) >> ISM_SHIFT); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return x; 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Convert m (bps) into sm (bytes/psched us) */ 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsm2sm(u32 m) 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 sm; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sm = ((u64)m << SM_SHIFT); 43000c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy sm += PSCHED_TICKS_PER_SEC - 1; 43100c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy do_div(sm, PSCHED_TICKS_PER_SEC); 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sm; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert m (bps) into ism (psched us/byte) */ 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsm2ism(u32 m) 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 ism; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (m == 0) 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ism = HT_INFINITY; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 44400c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy ism = ((u64)PSCHED_TICKS_PER_SEC << ISM_SHIFT); 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ism += m - 1; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(ism, m); 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ism; 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert d (us) into dx (psched us) */ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsd2dx(u32 d) 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 dx; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 45700c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy dx = ((u64)d * PSCHED_TICKS_PER_SEC); 458538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy dx += USEC_PER_SEC - 1; 459538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy do_div(dx, USEC_PER_SEC); 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return dx; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert sm (bytes/psched us) into m (bps) */ 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssm2m(u64 sm) 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 m; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 46900c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy m = (sm * PSCHED_TICKS_PER_SEC) >> SM_SHIFT; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (u32)m; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* convert dx (psched us) into d (us) */ 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u32 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdx2d(u64 dx) 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 d; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 479538e43a4bd36ae49873ef7097a16a207f5d9912bPatrick McHardy d = dx * USEC_PER_SEC; 48000c04af9df3d26e5a8093da850e982a7b6aeada7Patrick McHardy do_div(d, PSCHED_TICKS_PER_SEC); 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (u32)d; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldssc2isc(struct tc_service_curve *sc, struct internal_sc *isc) 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->sm1 = m2sm(sc->m1); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->ism1 = m2ism(sc->m1); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->dx = d2dx(sc->d); 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->dy = seg_x2y(isc->dx, isc->sm1); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->sm2 = m2sm(sc->m2); 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isc->ism2 = m2ism(sc->m2); 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * initialize the runtime service curve with the given internal 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve starting at (x, y). 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_init(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->sm1 = isc->sm1; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->ism1 = isc->ism1; 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = isc->dx; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = isc->dy; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->sm2 = isc->sm2; 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->ism2 = isc->ism2; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * calculate the y-projection of the runtime service curve by the 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * given x-projection value 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_y2x(struct runtime_sc *rtsc, u64 y) 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 x; 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y < rtsc->y) 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (y <= rtsc->y + rtsc->dy) { 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* x belongs to the 1st segment */ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rtsc->dy == 0) 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + rtsc->dx; 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + seg_y2x(y - rtsc->y, rtsc->ism1); 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* x belongs to the 2nd segment */ 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds x = rtsc->x + rtsc->dx 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + seg_y2x(y - rtsc->y - rtsc->dy, rtsc->ism2); 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return x; 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic u64 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_x2y(struct runtime_sc *rtsc, u64 x) 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (x <= rtsc->x) 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (x <= rtsc->x + rtsc->dx) 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* y belongs to the 1st segment */ 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y + seg_x2y(x - rtsc->x, rtsc->sm1); 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* y belongs to the 2nd segment */ 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y = rtsc->y + rtsc->dy 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds + seg_x2y(x - rtsc->x - rtsc->dx, rtsc->sm2); 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return y; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update the runtime service curve by taking the minimum of the current 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * runtime service curve and the service curve starting at (x, y). 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsrtsc_min(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 y1, y2, dx, dy; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 dsm; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (isc->sm1 <= isc->sm2) { 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* service curve is convex */ 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y1 = rtsc_x2y(rtsc, x); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y1 < y) 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* the current rtsc is smaller */ 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * service curve is concave 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute the two y values of the current rtsc 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y1: at x 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * y2: at (x + dx) 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y1 = rtsc_x2y(rtsc, x); 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y1 <= y) { 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* rtsc is below isc, no change to rtsc */ 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds y2 = rtsc_x2y(rtsc, x + isc->dx); 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (y2 >= y + isc->dy) { 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* rtsc is above isc, replace rtsc by isc */ 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = isc->dx; 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = isc->dy; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the two curves intersect 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * compute the offsets (dx, dy) using the reverse 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * function of seg_x2y() 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * seg_x2y(dx, sm1) == seg_x2y(dx, sm2) + (y1 - y) 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dx = (y1 - y) << SM_SHIFT; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dsm = isc->sm1 - isc->sm2; 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_div(dx, dsm); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * check if (x, y1) belongs to the 1st segment of rtsc. 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if so, add the offset. 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rtsc->x + rtsc->dx > x) 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dx += rtsc->x + rtsc->dx - x; 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dy = seg_x2y(dx, isc->sm1); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->x = x; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->y = y; 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dx = dx; 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc->dy = dy; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsinit_ed(struct hfsc_class *cl, unsigned int next_len) 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6243bebcda28077375470dd60545b71bba2f83335fdPatrick McHardy u64 cur_time = psched_get_time(); 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the deadline curve */ 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update the eligible curve. 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for concave, it is equal to the deadline curve. 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for convex, it is a linear curve with slope m2. 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible = cl->cl_deadline; 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dx = 0; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dy = 0; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* compute e and d */ 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_insert(cl); 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_ed(struct hfsc_class *cl, unsigned int next_len) 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_update(cl); 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_d(struct hfsc_class *cl, unsigned int next_len) 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_cfmin(struct hfsc_class *cl) 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n = rb_first(&cl->cf_tree); 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n == NULL) { 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = 0; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = rb_entry(n, struct hfsc_class, cf_node); 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = p->cl_f; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsinit_vf(struct hfsc_class *cl, unsigned int len) 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *max_cl; 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rb_node *n; 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 vt, f, cur_time; 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int go_active; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cur_time = 0; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 1; 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (; cl->cl_parent != NULL; cl = cl->cl_parent) { 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_active && cl->cl_nactive++ == 0) 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 1; 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_active = 0; 6911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_active) { 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds n = rb_last(&cl->cl_parent->vt_tree); 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (n != NULL) { 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_cl = rb_entry(n, struct hfsc_class,vt_node); 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * set vt to the average of the min and max 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * classes. if the parent's period didn't 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * change, don't decrease vt of the class. 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = max_cl->cl_vt; 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_cvtmin != 0) 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = (cl->cl_parent->cl_cvtmin + vt)/2; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_vtperiod != 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod || vt > cl->cl_vt) 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = vt; 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * first child for a new parent backlog period. 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * add parent's cvtmax to cvtoff to make a new 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vt (vtoff + vt) larger than the vt in the 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * last period for all children. 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = cl->cl_parent->cl_cvtmax; 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtoff += vt; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmax = 0; 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmin = 0; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = 0; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = cl->cl_parent->cl_cvtoff - 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff; 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the virtual curve */ 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vt = cl->cl_vt + cl->cl_vtoff; 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_virtual, &cl->cl_fsc, vt, 72810297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki cl->cl_total); 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_virtual.x == vt) { 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_virtual.x -= cl->cl_vtoff; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = 0; 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj = 0; 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtperiod++; /* increment vt period */ 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod = cl->cl_parent->cl_vtperiod; 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent->cl_nactive == 0) 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod++; 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = 0; 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_insert(cl); 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_insert(cl); 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) { 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* class has upper limit curve */ 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cur_time == 0) 7473bebcda28077375470dd60545b71bba2f83335fdPatrick McHardy cur_time = psched_get_time(); 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the ulimit curve */ 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_min(&cl->cl_ulimit, &cl->cl_usc, cur_time, 75110297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki cl->cl_total); 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* compute myf */ 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = rtsc_y2x(&cl->cl_ulimit, 75410297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki cl->cl_total); 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj = 0; 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds f = max(cl->cl_myf, cl->cl_cfmin); 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (f != cl->cl_f) { 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = f; 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_update(cl); 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsupdate_vf(struct hfsc_class *cl, unsigned int len, u64 cur_time) 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 f; /* , myf_bound, delta; */ 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int go_passive = 0; 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 0 && cl->cl_flags & HFSC_FSC) 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 1; 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (; cl->cl_parent != NULL; cl = cl->cl_parent) { 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total += len; 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(cl->cl_flags & HFSC_FSC) || cl->cl_nactive == 0) 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_passive && --cl->cl_nactive == 0) 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 1; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds go_passive = 0; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (go_passive) { 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* no more active child, going passive */ 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update cvtmax of the parent class */ 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt > cl->cl_parent->cl_cvtmax) 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent->cl_cvtmax = cl->cl_vt; 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* remove this class from the vt tree */ 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_remove(cl); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_remove(cl); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * update vt and f 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = rtsc_y2x(&cl->cl_virtual, cl->cl_total) 80810297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki - cl->cl_vtoff + cl->cl_vtadj; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if vt of the class is smaller than cvtmin, 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the class was skipped in the past due to non-fit. 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if so, we need to adjust vtadj. 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_vt < cl->cl_parent->cl_cvtmin) { 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj += cl->cl_parent->cl_cvtmin - cl->cl_vt; 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = cl->cl_parent->cl_cvtmin; 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update the vt tree */ 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds vttree_update(cl); 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) { 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = cl->cl_myfadj + rtsc_y2x(&cl->cl_ulimit, 82510297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki cl->cl_total); 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code causes classes to stay way under their 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * limit when multiple classes are used at gigabit 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * speed. needs investigation. -kaber 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if myf lags behind by more than one clock tick 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * from the current time, adjust myfadj to prevent 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a rate-limited class from going greedy. 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * in a steady state under rate-limiting, myf 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fluctuates within one clock tick. 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds myf_bound = cur_time - PSCHED_JIFFIE2US(1); 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_myf < myf_bound) { 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds delta = cur_time - cl->cl_myf; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj += delta; 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf += delta; 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds f = max(cl->cl_myf, cl->cl_cfmin); 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (f != cl->cl_f) { 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = f; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cftree_update(cl); 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_cfmin(cl->cl_parent); 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsset_active(struct hfsc_class *cl, unsigned int len) 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_ed(cl, len); 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_vf(cl, len); 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&cl->dlist, &cl->sched->droplist); 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsset_passive(struct hfsc_class *cl) 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds eltree_remove(cl); 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&cl->dlist); 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vttree is now handled in update_vf() so that update_vf(cl, 0, 0) 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * needs to be called explicitly to remove a class from vttree. 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsqdisc_peek_len(struct Qdisc *sch) 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *skb; 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 88803c05f0d4bb0c267edf12d614025a40e33c5a6f9Jarek Poplawski skb = sch->ops->peek(sch); 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (skb == NULL) { 890b00355db3f88d96810a60011a30cfb2c3469409dJarek Poplawski qdisc_warn_nonwc("qdisc_peek_len", sch); 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8930abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna len = qdisc_pkt_len(skb); 89403c05f0d4bb0c267edf12d614025a40e33c5a6f9Jarek Poplawski 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_purge_queue(struct Qdisc *sch, struct hfsc_class *cl) 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len = cl->qdisc->q.qlen; 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_reset(cl->qdisc); 904f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy qdisc_tree_decrease_qlen(cl->qdisc, len); 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_adjust_levels(struct hfsc_class *cl) 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p; 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int level; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds level = 0; 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(p, &cl->children, siblings) { 916210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy if (p->level >= level) 917210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy level = p->level + 1; 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 919210525d65d33d17eb6bea6c965ce442d60d9aa8dPatrick McHardy cl->level = level; 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } while ((cl = cl->cl_parent) != NULL); 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct hfsc_class * 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_find_class(u32 classid, struct Qdisc *sch) 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 927be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct Qdisc_class_common *clc; 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 929be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy clc = qdisc_class_find(&q->clhash, classid); 930be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy if (clc == NULL) 931be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy return NULL; 932be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy return container_of(clc, struct hfsc_class, cl_common); 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_rsc(struct hfsc_class *cl, struct tc_service_curve *rsc, 93710297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki u64 cur_time) 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(rsc, &cl->cl_rsc); 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible = cl->cl_deadline; 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dx = 0; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_eligible.dy = 0; 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_RSC; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_fsc(struct hfsc_class *cl, struct tc_service_curve *fsc) 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(fsc, &cl->cl_fsc); 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_virtual, &cl->cl_fsc, cl->cl_vt, cl->cl_total); 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_FSC; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_usc(struct hfsc_class *cl, struct tc_service_curve *usc, 95910297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki u64 cur_time) 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sc2isc(usc, &cl->cl_usc); 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_ulimit, &cl->cl_usc, cur_time, cl->cl_total); 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_flags |= HFSC_USC; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 96627a3421e4821734bc19496faa77b380605dc3b23Patrick McHardystatic const struct nla_policy hfsc_policy[TCA_HFSC_MAX + 1] = { 96727a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy [TCA_HFSC_RSC] = { .len = sizeof(struct tc_service_curve) }, 96827a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy [TCA_HFSC_FSC] = { .len = sizeof(struct tc_service_curve) }, 96927a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy [TCA_HFSC_USC] = { .len = sizeof(struct tc_service_curve) }, 97027a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy}; 97127a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid, 9741e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy struct nlattr **tca, unsigned long *arg) 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)*arg; 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *parent = NULL; 9791e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy struct nlattr *opt = tca[TCA_OPTIONS]; 9801e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy struct nlattr *tb[TCA_HFSC_MAX + 1]; 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time; 983cee63723b358e594225e812d6e14a2a0abfd5c88Patrick McHardy int err; 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 985cee63723b358e594225e812d6e14a2a0abfd5c88Patrick McHardy if (opt == NULL) 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 98827a3421e4821734bc19496faa77b380605dc3b23Patrick McHardy err = nla_parse_nested(tb, TCA_HFSC_MAX, opt, hfsc_policy); 989cee63723b358e594225e812d6e14a2a0abfd5c88Patrick McHardy if (err < 0) 990cee63723b358e594225e812d6e14a2a0abfd5c88Patrick McHardy return err; 991cee63723b358e594225e812d6e14a2a0abfd5c88Patrick McHardy 9921e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy if (tb[TCA_HFSC_RSC]) { 9931e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy rsc = nla_data(tb[TCA_HFSC_RSC]); 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc->m1 == 0 && rsc->m2 == 0) 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rsc = NULL; 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9981e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy if (tb[TCA_HFSC_FSC]) { 9991e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy fsc = nla_data(tb[TCA_HFSC_FSC]); 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc->m1 == 0 && fsc->m2 == 0) 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsc = NULL; 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10041e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy if (tb[TCA_HFSC_USC]) { 10051e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy usc = nla_data(tb[TCA_HFSC_USC]); 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc->m1 == 0 && usc->m2 == 0) 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usc = NULL; 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) { 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid) { 1012be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy if (cl->cl_parent && 1013be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy cl->cl_parent->cl_common.classid != parentid) 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_parent == NULL && parentid != TC_H_ROOT) 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10183bebcda28077375470dd60545b71bba2f83335fdPatrick McHardy cur_time = psched_get_time(); 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 102071bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger if (tca[TCA_RATE]) { 102171bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger err = gen_replace_estimator(&cl->bstats, &cl->rate_est, 102271bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger qdisc_root_sleeping_lock(sch), 102371bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger tca[TCA_RATE]); 102471bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger if (err) 102571bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger return err; 102671bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger } 102771bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc != NULL) 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_rsc(cl, rsc, cur_time); 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc != NULL) 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_fsc(cl, fsc); 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc != NULL) 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_usc(cl, usc, cur_time); 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen != 0) { 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_ed(cl, qdisc_peek_len(cl->qdisc)); 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, 0, cur_time); 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid == TC_H_ROOT) 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EEXIST; 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = &q->root; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parentid) { 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds parent = hfsc_find_class(parentid, sch); 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parent == NULL) 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (classid == 0 || TC_H_MAJ(classid ^ sch->handle) != 0) 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hfsc_find_class(classid, sch)) 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EEXIST; 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc == NULL && fsc == NULL) 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10650da974f4f303a6842516b764507e3c0a03f41e5aPanagiotis Issaris cl = kzalloc(sizeof(struct hfsc_class), GFP_KERNEL); 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 10671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOBUFS; 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 106971bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger if (tca[TCA_RATE]) { 107071bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger err = gen_new_estimator(&cl->bstats, &cl->rate_est, 107171bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger qdisc_root_sleeping_lock(sch), 107271bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger tca[TCA_RATE]); 107371bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger if (err) { 107471bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger kfree(cl); 107571bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger return err; 107671bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger } 107771bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger } 107871bcb09a57894fa35591ce93dd972065eeecb63aStephen Hemminger 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rsc != NULL) 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_rsc(cl, rsc, 0); 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsc != NULL) 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_fsc(cl, fsc); 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (usc != NULL) 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_change_usc(cl, usc, 0); 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1086be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy cl->cl_common.classid = classid; 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->refcnt = 1; 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->sched = q; 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parent = parent; 10905ce2d488fe039ddd86a638496cf704df86c74eebDavid S. Miller cl->qdisc = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, 1091bb949fbd1878973c3539d9aecff52f284482a937David S. Miller &pfifo_qdisc_ops, classid); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc == NULL) 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qdisc = &noop_qdisc; 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&cl->children); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->vt_tree = RB_ROOT; 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cf_tree = RB_ROOT; 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 1099be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_insert(&q->clhash, &cl->cl_common); 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_add_tail(&cl->siblings, &parent->children); 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (parent->level == 0) 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, parent); 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_adjust_levels(parent); 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff = parent->cl_cvtoff; 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1107be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_grow(sch, &q->clhash); 1108be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *arg = (unsigned long)cl; 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_destroy_class(struct Qdisc *sch, struct hfsc_class *cl) 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1118ff31ab56c0e900235f653e375fc3b01ba2d8d6a3Patrick McHardy tcf_destroy_chain(&cl->filter_list); 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_destroy(cl->qdisc); 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gen_kill_estimator(&cl->bstats, &cl->rate_est); 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != &q->root) 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(cl); 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_delete_class(struct Qdisc *sch, unsigned long arg) 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level > 0 || cl->filter_cnt > 0 || cl == &q->root) 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_del(&cl->siblings); 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_adjust_levels(cl->cl_parent); 1138c38c83cb705a41e30a99545ae2314c00e3b9bf1cPatrick McHardy 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, cl); 1140be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_remove(&q->clhash, &cl->cl_common); 1141c38c83cb705a41e30a99545ae2314c00e3b9bf1cPatrick McHardy 11427cd0a63872ac6ef97265f07adc367ca4f984468eJarek Poplawski BUG_ON(--cl->refcnt == 0); 11437cd0a63872ac6ef97265f07adc367ca4f984468eJarek Poplawski /* 11447cd0a63872ac6ef97265f07adc367ca4f984468eJarek Poplawski * This shouldn't happen: we "hold" one cops->get() when called 11457cd0a63872ac6ef97265f07adc367ca4f984468eJarek Poplawski * from tc_ctl_tclass; the destroy method is done from cops->put(). 11467cd0a63872ac6ef97265f07adc367ca4f984468eJarek Poplawski */ 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 11491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct hfsc_class * 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_result res; 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tcf_proto *tcf; 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (TC_H_MAJ(skb->priority ^ sch->handle) == 0 && 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (cl = hfsc_find_class(skb->priority, sch)) != NULL) 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1166c27f339af90bb874a7a9c680b17abfd32d4a727bJarek Poplawski *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcf = q->root.filter_list; 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (tcf && (result = tc_classify(skb, tcf, &res)) >= 0) { 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_NET_CLS_ACT 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (result) { 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case TC_ACT_QUEUED: 117210297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki case TC_ACT_STOLEN: 1173378a2f090f7a478704a372a4869b8a9ac206234eJarek Poplawski *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; 117410297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki case TC_ACT_SHOT: 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = (struct hfsc_class *)res.class) == NULL) { 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = hfsc_find_class(res.classid, sch)) == NULL) 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; /* filter selected invalid classid */ 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; /* hit leaf class */ 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* apply inner filter chain */ 11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcf = cl->filter_list; 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* classification failed, try default class */ 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = hfsc_find_class(TC_H_MAKE(TC_H_MAJ(sch->handle), q->defcls), sch); 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL || cl->level > 0) 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl; 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_graft_class(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, 120010297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki struct Qdisc **old) 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOENT; 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level > 0) 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) { 12095ce2d488fe039ddd86a638496cf704df86c74eebDavid S. Miller new = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, 1210bb949fbd1878973c3539d9aecff52f284482a937David S. Miller &pfifo_qdisc_ops, 1211be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy cl->cl_common.classid); 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new == NULL) 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new = &noop_qdisc; 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_purge_queue(sch, cl); 1218b94c8afcba3ae6584653b98e315446ea83be6ea5Patrick McHardy *old = cl->qdisc; 1219b94c8afcba3ae6584653b98e315446ea83be6ea5Patrick McHardy cl->qdisc = new; 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct Qdisc * 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_class_leaf(struct Qdisc *sch, unsigned long arg) 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL && cl->level == 0) 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return cl->qdisc; 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1235f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardystatic void 1236f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardyhfsc_qlen_notify(struct Qdisc *sch, unsigned long arg) 1237f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy{ 1238f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy struct hfsc_class *cl = (struct hfsc_class *)arg; 1239f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy 1240f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy if (cl->qdisc->q.qlen == 0) { 1241f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy update_vf(cl, 0, 0); 1242f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy set_passive(cl); 1243f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy } 1244f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy} 1245f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned long 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_get_class(struct Qdisc *sch, u32 classid) 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = hfsc_find_class(classid, sch); 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->refcnt++; 12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (unsigned long)cl; 12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_put_class(struct Qdisc *sch, unsigned long arg) 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (--cl->refcnt == 0) 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_class(sch, cl); 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned long 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_bind_tcf(struct Qdisc *sch, unsigned long parent, u32 classid) 12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *p = (struct hfsc_class *)parent; 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = hfsc_find_class(classid, sch); 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl != NULL) { 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (p != NULL && p->level <= cl->level) 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->filter_cnt++; 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (unsigned long)cl; 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_unbind_tcf(struct Qdisc *sch, unsigned long arg) 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->filter_cnt--; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct tcf_proto ** 12901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_tcf_chain(struct Qdisc *sch, unsigned long arg) 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = &q->root; 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return &cl->filter_list; 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_sc(struct sk_buff *skb, int attr, struct internal_sc *sc) 13031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_service_curve tsc; 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.m1 = sm2m(sc->sm1); 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.d = dx2d(sc->dx); 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tsc.m2 = sm2m(sc->sm2); 13091e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy NLA_PUT(skb, attr, sizeof(tsc), &tsc); 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13131e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy nla_put_failure: 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_curves(struct sk_buff *skb, struct hfsc_class *cl) 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_RSC) && 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_RSC, &cl->cl_rsc) < 0)) 13221e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy goto nla_put_failure; 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_FSC) && 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_FSC, &cl->cl_fsc) < 0)) 13261e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy goto nla_put_failure; 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl->cl_flags & HFSC_USC) && 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (hfsc_dump_sc(skb, TCA_HFSC_USC, &cl->cl_usc) < 0)) 13301e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy goto nla_put_failure; 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13341e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy nla_put_failure: 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 13361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_class(struct Qdisc *sch, unsigned long arg, struct sk_buff *skb, 134010297b99315e5e08fe623ba56da35db1fee69ba9YOSHIFUJI Hideaki struct tcmsg *tcm) 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13434b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy struct nlattr *nest; 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1345be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy tcm->tcm_parent = cl->cl_parent ? cl->cl_parent->cl_common.classid : 1346be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy TC_H_ROOT; 1347be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy tcm->tcm_handle = cl->cl_common.classid; 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->level == 0) 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tcm->tcm_info = cl->qdisc->handle; 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13514b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy nest = nla_nest_start(skb, TCA_OPTIONS); 13524b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy if (nest == NULL) 13534b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy goto nla_put_failure; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hfsc_dump_curves(skb, cl) < 0) 13551e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy goto nla_put_failure; 13564b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy nla_nest_end(skb, nest); 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 13581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13591e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy nla_put_failure: 13604b3550ef530cfc153fa91f0b37cbda448bad11c6Patrick McHardy nla_nest_cancel(skb, nest); 1361bc3ed28caaef55e7e3a9316464256353c5f9b1dfThomas Graf return -EMSGSIZE; 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_class_stats(struct Qdisc *sch, unsigned long arg, 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct gnet_dump *d) 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl = (struct hfsc_class *)arg; 13691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_stats xstats; 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qstats.qlen = cl->qdisc->q.qlen; 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.level = cl->level; 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.period = cl->cl_vtperiod; 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.work = cl->cl_total; 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds xstats.rtwork = cl->cl_cumul; 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gnet_stats_copy_basic(d, &cl->bstats) < 0 || 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gnet_stats_copy_rate_est(d, &cl->rate_est) < 0 || 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gnet_stats_copy_queue(d, &cl->qstats) < 0) 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return gnet_stats_copy_app(d, &xstats, sizeof(xstats)); 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_walk(struct Qdisc *sch, struct qdisc_walker *arg) 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 1391be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct hlist_node *n; 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->stop) 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1398be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy for (i = 0; i < q->clhash.hashsize; i++) { 1399be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy hlist_for_each_entry(cl, n, &q->clhash.hash[i], 1400be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy cl_common.hnode) { 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->count < arg->skip) { 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->count++; 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (arg->fn(sch, (unsigned long)cl, arg) < 0) { 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->stop = 1; 14071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds arg->count++; 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 1415ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardyhfsc_schedule_watchdog(struct Qdisc *sch) 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 next_time = 0; 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = eltree_get_minel(q)) != NULL) 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_time = cl->cl_e; 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (q->root.cl_cfmin != 0) { 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (next_time == 0 || next_time > q->root.cl_cfmin) 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_time = q->root.cl_cfmin; 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14273d50f23108ff01457d1ca6fb2b5f2da8214e83e4Patrick McHardy WARN_ON(next_time == 0); 1428ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy qdisc_watchdog_schedule(&q->watchdog, next_time); 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 14321e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardyhfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt) 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt *qopt; 1436be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy int err; 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14381e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy if (opt == NULL || nla_len(opt) < sizeof(*qopt)) 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 14401e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy qopt = nla_data(opt); 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->defcls = qopt->defcls; 1443be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy err = qdisc_class_hash_init(&q->clhash); 1444be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy if (err < 0) 1445be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy return err; 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->eligible = RB_ROOT; 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->droplist); 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1449be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy q->root.cl_common.classid = sch->handle; 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.refcnt = 1; 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.sched = q; 14525ce2d488fe039ddd86a638496cf704df86c74eebDavid S. Miller q->root.qdisc = qdisc_create_dflt(qdisc_dev(sch), sch->dev_queue, 1453bb949fbd1878973c3539d9aecff52f284482a937David S. Miller &pfifo_qdisc_ops, 14549f9afec48221fe4a19f84a9341f5b304bf7d7783Patrick McHardy sch->handle); 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (q->root.qdisc == NULL) 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.qdisc = &noop_qdisc; 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->root.children); 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.vt_tree = RB_ROOT; 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->root.cf_tree = RB_ROOT; 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1461be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_insert(&q->clhash, &q->root.cl_common); 1462be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_grow(sch, &q->clhash); 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1464ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy qdisc_watchdog_init(&q->watchdog, sch); 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 14701e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardyhfsc_change_qdisc(struct Qdisc *sch, struct nlattr *opt) 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt *qopt; 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14751e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy if (opt == NULL || nla_len(opt) < sizeof(*qopt)) 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 14771e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy qopt = nla_data(opt); 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_lock(sch); 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->defcls = qopt->defcls; 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch_tree_unlock(sch); 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_reset_class(struct hfsc_class *cl) 14881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_total = 0; 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cumul = 0; 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_d = 0; 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_e = 0; 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vt = 0; 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtadj = 0; 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtoff = 0; 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtmin = 0; 14971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtmax = 0; 14981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cvtoff = 0; 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_pcvtoff = 0; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_vtperiod = 0; 15011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_parentperiod = 0; 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_f = 0; 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myf = 0; 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_myfadj = 0; 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_cfmin = 0; 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cl_nactive = 0; 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->vt_tree = RB_ROOT; 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->cf_tree = RB_ROOT; 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qdisc_reset(cl->qdisc); 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_deadline, &cl->cl_rsc, 0, 0); 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_FSC) 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_virtual, &cl->cl_fsc, 0, 0); 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_USC) 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rtsc_init(&cl->cl_ulimit, &cl->cl_usc, 0, 0); 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 15211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_reset_qdisc(struct Qdisc *sch) 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 15241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 1525be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct hlist_node *n; 15261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 15271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1528be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy for (i = 0; i < q->clhash.hashsize; i++) { 1529be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy hlist_for_each_entry(cl, n, &q->clhash.hash[i], cl_common.hnode) 15301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_reset_class(cl); 15311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds q->eligible = RB_ROOT; 15331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INIT_LIST_HEAD(&q->droplist); 1534ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy qdisc_watchdog_cancel(&q->watchdog); 15351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen = 0; 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_destroy_qdisc(struct Qdisc *sch) 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 1542be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct hlist_node *n, *next; 1543be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy struct hfsc_class *cl; 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int i; 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1546be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy for (i = 0; i < q->clhash.hashsize; i++) { 1547be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy hlist_for_each_entry(cl, n, &q->clhash.hash[i], cl_common.hnode) 1548a4aebb83cf0da0363684f1c339f7e6149a3e74c1Patrick McHardy tcf_destroy_chain(&cl->filter_list); 1549a4aebb83cf0da0363684f1c339f7e6149a3e74c1Patrick McHardy } 1550be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy for (i = 0; i < q->clhash.hashsize; i++) { 1551be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy hlist_for_each_entry_safe(cl, n, next, &q->clhash.hash[i], 1552be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy cl_common.hnode) 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hfsc_destroy_class(sch, cl); 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1555be0d39d52ce35554e856de7e9ea37ac1fa4a7f91Patrick McHardy qdisc_class_hash_destroy(&q->clhash); 1556ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy qdisc_watchdog_cancel(&q->watchdog); 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dump_qdisc(struct Qdisc *sch, struct sk_buff *skb) 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 156327a884dc3cb63b93c2b3b643f5b31eed5f8a4d26Arnaldo Carvalho de Melo unsigned char *b = skb_tail_pointer(skb); 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct tc_hfsc_qopt qopt; 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds qopt.defcls = q->defcls; 15671e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy NLA_PUT(skb, TCA_OPTIONS, sizeof(qopt), &qopt); 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb->len; 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15701e90474c377e92db7262a8968a45c1dd980ca9e5Patrick McHardy nla_put_failure: 1571dc5fc579b90ed0a9a4e55b0218cdbaf0a8cf2e67Arnaldo Carvalho de Melo nlmsg_trim(skb, b); 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -1; 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch) 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 1579dc0a0011cfa8ff01b86859006f4db3656c9a896bIngo Molnar int uninitialized_var(err); 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = hfsc_classify(skb, sch, &err); 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) { 1583c27f339af90bb874a7a9c680b17abfd32d4a727bJarek Poplawski if (err & __NET_XMIT_BYPASS) 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.drops++; 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree_skb(skb); 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15895f86173bdf15981ca49d0434f638b68f70a35644Jussi Kivilinna err = qdisc_enqueue(skb, cl->qdisc); 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(err != NET_XMIT_SUCCESS)) { 1591378a2f090f7a478704a372a4869b8a9ac206234eJarek Poplawski if (net_xmit_drop_count(err)) { 1592378a2f090f7a478704a372a4869b8a9ac206234eJarek Poplawski cl->qstats.drops++; 1593378a2f090f7a478704a372a4869b8a9ac206234eJarek Poplawski sch->qstats.drops++; 1594378a2f090f7a478704a372a4869b8a9ac206234eJarek Poplawski } 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return err; 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 1) 15990abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna set_active(cl, qdisc_pkt_len(skb)); 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->bstats.packets++; 16020abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna cl->bstats.bytes += qdisc_pkt_len(skb); 16031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->bstats.packets++; 16040abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna sch->bstats.bytes += qdisc_pkt_len(skb); 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen++; 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NET_XMIT_SUCCESS; 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct sk_buff * 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_dequeue(struct Qdisc *sch) 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct sk_buff *skb; 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u64 cur_time; 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int next_len; 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int realtime = 0; 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sch->q.qlen == 0) 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16233bebcda28077375470dd60545b71bba2f83335fdPatrick McHardy cur_time = psched_get_time(); 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if there are eligible classes, use real-time criteria. 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * find the class with the minimum deadline among 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the eligible classes. 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((cl = eltree_get_mindl(q, cur_time)) != NULL) { 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds realtime = 1; 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * use link-sharing criteria 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * get the class with the minimum vt in the hierarchy 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl = vttree_get_minvt(&q->root, cur_time); 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl == NULL) { 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.overlimits++; 1640ed2b229a97fd537857ad8441ab8b5996b15eadfdPatrick McHardy hfsc_schedule_watchdog(sch); 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 164577be155cba4e163e8bba9fd27222a8b6189ec4f7Jarek Poplawski skb = qdisc_dequeue_peeked(cl->qdisc); 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (skb == NULL) { 1647b00355db3f88d96810a60011a30cfb2c3469409dJarek Poplawski qdisc_warn_nonwc("HFSC", cl->qdisc); 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 16491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16510abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna update_vf(cl, qdisc_pkt_len(skb), cur_time); 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (realtime) 16530abf77e55a2459aa9905be4b226e4729d5b4f0cbJussi Kivilinna cl->cl_cumul += qdisc_pkt_len(skb); 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen != 0) { 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->cl_flags & HFSC_RSC) { 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* update ed */ 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds next_len = qdisc_peek_len(cl->qdisc); 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (realtime) 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_ed(cl, next_len); 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_d(cl, next_len); 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* the class becomes passive */ 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_passive(cl); 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->flags &= ~TCQ_F_THROTTLED; 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen--; 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return skb; 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic unsigned int 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_drop(struct Qdisc *sch) 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_sched *q = qdisc_priv(sch); 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct hfsc_class *cl; 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int len; 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(cl, &q->droplist, dlist) { 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->ops->drop != NULL && 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (len = cl->qdisc->ops->drop(cl->qdisc)) > 0) { 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cl->qdisc->q.qlen == 0) { 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds update_vf(cl, 0, 0); 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_passive(cl); 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_move_tail(&cl->dlist, &q->droplist); 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cl->qstats.drops++; 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->qstats.drops++; 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sch->q.qlen--; 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 170020fea08b5fb639c4c175b5c74a2bb346c5c5bc2eEric Dumazetstatic const struct Qdisc_class_ops hfsc_class_ops = { 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .change = hfsc_change_class, 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .delete = hfsc_delete_class, 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .graft = hfsc_graft_class, 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .leaf = hfsc_class_leaf, 1705f973b913e18ab5a4795738ddf8a8666ac306ee12Patrick McHardy .qlen_notify = hfsc_qlen_notify, 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .get = hfsc_get_class, 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .put = hfsc_put_class, 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bind_tcf = hfsc_bind_tcf, 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .unbind_tcf = hfsc_unbind_tcf, 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .tcf_chain = hfsc_tcf_chain, 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump = hfsc_dump_class, 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump_stats = hfsc_dump_class_stats, 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .walk = hfsc_walk 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 171620fea08b5fb639c4c175b5c74a2bb346c5c5bc2eEric Dumazetstatic struct Qdisc_ops hfsc_qdisc_ops __read_mostly = { 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id = "hfsc", 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .init = hfsc_init_qdisc, 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .change = hfsc_change_qdisc, 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .reset = hfsc_reset_qdisc, 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .destroy = hfsc_destroy_qdisc, 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dump = hfsc_dump_qdisc, 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .enqueue = hfsc_enqueue, 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .dequeue = hfsc_dequeue, 172577be155cba4e163e8bba9fd27222a8b6189ec4f7Jarek Poplawski .peek = qdisc_peek_dequeued, 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .drop = hfsc_drop, 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cl_ops = &hfsc_class_ops, 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .priv_size = sizeof(struct hfsc_sched), 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_init(void) 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return register_qdisc(&hfsc_qdisc_ops); 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshfsc_cleanup(void) 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unregister_qdisc(&hfsc_qdisc_ops); 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(hfsc_init); 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(hfsc_cleanup); 1747