Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2003 Patrick McHardy, <kaber@trash.net> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version 2 |
| 7 | * of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * 2003-10-17 - Ported from altq |
| 10 | */ |
| 11 | /* |
| 12 | * Copyright (c) 1997-1999 Carnegie Mellon University. All Rights Reserved. |
| 13 | * |
| 14 | * Permission to use, copy, modify, and distribute this software and |
| 15 | * its documentation is hereby granted (including for commercial or |
| 16 | * for-profit use), provided that both the copyright notice and this |
| 17 | * permission notice appear in all copies of the software, derivative |
| 18 | * works, or modified versions, and any portions thereof. |
| 19 | * |
| 20 | * THIS SOFTWARE IS EXPERIMENTAL AND IS KNOWN TO HAVE BUGS, SOME OF |
| 21 | * WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON PROVIDES THIS |
| 22 | * SOFTWARE IN ITS ``AS IS'' CONDITION, AND ANY EXPRESS OR IMPLIED |
| 23 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 25 | * DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| 28 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 30 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
| 32 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| 33 | * DAMAGE. |
| 34 | * |
| 35 | * Carnegie Mellon encourages (but does not require) users of this |
| 36 | * software to return any improvements or extensions that they make, |
| 37 | * and to grant Carnegie Mellon the rights to redistribute these |
| 38 | * changes without encumbrance. |
| 39 | */ |
| 40 | /* |
| 41 | * H-FSC is described in Proceedings of SIGCOMM'97, |
| 42 | * "A Hierarchical Fair Service Curve Algorithm for Link-Sharing, |
| 43 | * Real-Time and Priority Service" |
| 44 | * by Ion Stoica, Hui Zhang, and T. S. Eugene Ng. |
| 45 | * |
| 46 | * Oleg Cherevko <olwi@aq.ml.com.ua> added the upperlimit for link-sharing. |
| 47 | * when a class has an upperlimit, the fit-time is computed from the |
| 48 | * upperlimit service curve. the link-sharing scheduler does not schedule |
| 49 | * a class whose fit-time exceeds the current time. |
| 50 | */ |
| 51 | |
| 52 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/module.h> |
| 54 | #include <linux/types.h> |
| 55 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #include <linux/compiler.h> |
| 57 | #include <linux/spinlock.h> |
| 58 | #include <linux/skbuff.h> |
| 59 | #include <linux/string.h> |
| 60 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/list.h> |
| 62 | #include <linux/rbtree.h> |
| 63 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | #include <linux/rtnetlink.h> |
| 65 | #include <linux/pkt_sched.h> |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 66 | #include <net/netlink.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | #include <net/pkt_sched.h> |
| 68 | #include <net/pkt_cls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #include <asm/div64.h> |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | /* |
| 72 | * kernel internal service curve representation: |
| 73 | * coordinates are given by 64 bit unsigned integers. |
| 74 | * x-axis: unit is clock count. |
| 75 | * y-axis: unit is byte. |
| 76 | * |
| 77 | * The service curve parameters are converted to the internal |
| 78 | * representation. The slope values are scaled to avoid overflow. |
| 79 | * the inverse slope values as well as the y-projection of the 1st |
Anand Gadiyar | fd589a8 | 2009-07-16 17:13:03 +0200 | [diff] [blame] | 80 | * segment are kept in order to avoid 64-bit divide operations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | * that are expensive on 32-bit architectures. |
| 82 | */ |
| 83 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 84 | struct internal_sc { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | u64 sm1; /* scaled slope of the 1st segment */ |
| 86 | u64 ism1; /* scaled inverse-slope of the 1st segment */ |
| 87 | u64 dx; /* the x-projection of the 1st segment */ |
| 88 | u64 dy; /* the y-projection of the 1st segment */ |
| 89 | u64 sm2; /* scaled slope of the 2nd segment */ |
| 90 | u64 ism2; /* scaled inverse-slope of the 2nd segment */ |
| 91 | }; |
| 92 | |
| 93 | /* runtime service curve */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 94 | struct runtime_sc { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | u64 x; /* current starting position on x-axis */ |
| 96 | u64 y; /* current starting position on y-axis */ |
| 97 | u64 sm1; /* scaled slope of the 1st segment */ |
| 98 | u64 ism1; /* scaled inverse-slope of the 1st segment */ |
| 99 | u64 dx; /* the x-projection of the 1st segment */ |
| 100 | u64 dy; /* the y-projection of the 1st segment */ |
| 101 | u64 sm2; /* scaled slope of the 2nd segment */ |
| 102 | u64 ism2; /* scaled inverse-slope of the 2nd segment */ |
| 103 | }; |
| 104 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 105 | enum hfsc_class_flags { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | HFSC_RSC = 0x1, |
| 107 | HFSC_FSC = 0x2, |
| 108 | HFSC_USC = 0x4 |
| 109 | }; |
| 110 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 111 | struct hfsc_class { |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 112 | struct Qdisc_class_common cl_common; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | unsigned int refcnt; /* usage count */ |
| 114 | |
Eric Dumazet | c1a8f1f | 2009-08-16 09:36:49 +0000 | [diff] [blame] | 115 | struct gnet_stats_basic_packed bstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | struct gnet_stats_queue qstats; |
Eric Dumazet | 45203a3 | 2013-06-06 08:43:22 -0700 | [diff] [blame] | 117 | struct gnet_stats_rate_est64 rate_est; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | unsigned int level; /* class level in hierarchy */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 119 | struct tcf_proto __rcu *filter_list; /* filter list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | unsigned int filter_cnt; /* filter count */ |
| 121 | |
| 122 | struct hfsc_sched *sched; /* scheduler data */ |
| 123 | struct hfsc_class *cl_parent; /* parent class */ |
| 124 | struct list_head siblings; /* sibling classes */ |
| 125 | struct list_head children; /* child classes */ |
| 126 | struct Qdisc *qdisc; /* leaf qdisc */ |
| 127 | |
| 128 | struct rb_node el_node; /* qdisc's eligible tree member */ |
| 129 | struct rb_root vt_tree; /* active children sorted by cl_vt */ |
| 130 | struct rb_node vt_node; /* parent's vt_tree member */ |
| 131 | struct rb_root cf_tree; /* active children sorted by cl_f */ |
| 132 | struct rb_node cf_node; /* parent's cf_heap member */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | struct list_head dlist; /* drop list member */ |
| 134 | |
| 135 | u64 cl_total; /* total work in bytes */ |
| 136 | u64 cl_cumul; /* cumulative work in bytes done by |
| 137 | real-time criteria */ |
| 138 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 139 | u64 cl_d; /* deadline*/ |
| 140 | u64 cl_e; /* eligible time */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | u64 cl_vt; /* virtual time */ |
| 142 | u64 cl_f; /* time when this class will fit for |
| 143 | link-sharing, max(myf, cfmin) */ |
| 144 | u64 cl_myf; /* my fit-time (calculated from this |
| 145 | class's own upperlimit curve) */ |
| 146 | u64 cl_myfadj; /* my fit-time adjustment (to cancel |
| 147 | history dependence) */ |
| 148 | u64 cl_cfmin; /* earliest children's fit-time (used |
| 149 | with cl_myf to obtain cl_f) */ |
| 150 | u64 cl_cvtmin; /* minimal virtual time among the |
| 151 | children fit for link-sharing |
| 152 | (monotonic within a period) */ |
| 153 | u64 cl_vtadj; /* intra-period cumulative vt |
| 154 | adjustment */ |
| 155 | u64 cl_vtoff; /* inter-period cumulative vt offset */ |
| 156 | u64 cl_cvtmax; /* max child's vt in the last period */ |
| 157 | u64 cl_cvtoff; /* cumulative cvtmax of all periods */ |
Joe Perches | 9a94b35 | 2007-12-20 14:02:40 -0800 | [diff] [blame] | 158 | u64 cl_pcvtoff; /* parent's cvtoff at initialization |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | time */ |
| 160 | |
| 161 | struct internal_sc cl_rsc; /* internal real-time service curve */ |
| 162 | struct internal_sc cl_fsc; /* internal fair service curve */ |
| 163 | struct internal_sc cl_usc; /* internal upperlimit service curve */ |
| 164 | struct runtime_sc cl_deadline; /* deadline curve */ |
| 165 | struct runtime_sc cl_eligible; /* eligible curve */ |
| 166 | struct runtime_sc cl_virtual; /* virtual curve */ |
| 167 | struct runtime_sc cl_ulimit; /* upperlimit curve */ |
| 168 | |
| 169 | unsigned long cl_flags; /* which curves are valid */ |
| 170 | unsigned long cl_vtperiod; /* vt period sequence number */ |
| 171 | unsigned long cl_parentperiod;/* parent's vt period sequence number*/ |
| 172 | unsigned long cl_nactive; /* number of active children */ |
| 173 | }; |
| 174 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 175 | struct hfsc_sched { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | u16 defcls; /* default class id */ |
| 177 | struct hfsc_class root; /* root class */ |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 178 | struct Qdisc_class_hash clhash; /* class hash */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | struct rb_root eligible; /* eligible tree */ |
| 180 | struct list_head droplist; /* active leaf class list (for |
| 181 | dropping) */ |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 182 | struct qdisc_watchdog watchdog; /* watchdog timer */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | }; |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | #define HT_INFINITY 0xffffffffffffffffULL /* infinite time value */ |
| 186 | |
| 187 | |
| 188 | /* |
| 189 | * eligible tree holds backlogged classes being sorted by their eligible times. |
| 190 | * there is one eligible tree per hfsc instance. |
| 191 | */ |
| 192 | |
| 193 | static void |
| 194 | eltree_insert(struct hfsc_class *cl) |
| 195 | { |
| 196 | struct rb_node **p = &cl->sched->eligible.rb_node; |
| 197 | struct rb_node *parent = NULL; |
| 198 | struct hfsc_class *cl1; |
| 199 | |
| 200 | while (*p != NULL) { |
| 201 | parent = *p; |
| 202 | cl1 = rb_entry(parent, struct hfsc_class, el_node); |
| 203 | if (cl->cl_e >= cl1->cl_e) |
| 204 | p = &parent->rb_right; |
| 205 | else |
| 206 | p = &parent->rb_left; |
| 207 | } |
| 208 | rb_link_node(&cl->el_node, parent, p); |
| 209 | rb_insert_color(&cl->el_node, &cl->sched->eligible); |
| 210 | } |
| 211 | |
| 212 | static inline void |
| 213 | eltree_remove(struct hfsc_class *cl) |
| 214 | { |
| 215 | rb_erase(&cl->el_node, &cl->sched->eligible); |
| 216 | } |
| 217 | |
| 218 | static inline void |
| 219 | eltree_update(struct hfsc_class *cl) |
| 220 | { |
| 221 | eltree_remove(cl); |
| 222 | eltree_insert(cl); |
| 223 | } |
| 224 | |
| 225 | /* find the class with the minimum deadline among the eligible classes */ |
| 226 | static inline struct hfsc_class * |
| 227 | eltree_get_mindl(struct hfsc_sched *q, u64 cur_time) |
| 228 | { |
| 229 | struct hfsc_class *p, *cl = NULL; |
| 230 | struct rb_node *n; |
| 231 | |
| 232 | for (n = rb_first(&q->eligible); n != NULL; n = rb_next(n)) { |
| 233 | p = rb_entry(n, struct hfsc_class, el_node); |
| 234 | if (p->cl_e > cur_time) |
| 235 | break; |
| 236 | if (cl == NULL || p->cl_d < cl->cl_d) |
| 237 | cl = p; |
| 238 | } |
| 239 | return cl; |
| 240 | } |
| 241 | |
| 242 | /* find the class with minimum eligible time among the eligible classes */ |
| 243 | static inline struct hfsc_class * |
| 244 | eltree_get_minel(struct hfsc_sched *q) |
| 245 | { |
| 246 | struct rb_node *n; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | n = rb_first(&q->eligible); |
| 249 | if (n == NULL) |
| 250 | return NULL; |
| 251 | return rb_entry(n, struct hfsc_class, el_node); |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * vttree holds holds backlogged child classes being sorted by their virtual |
| 256 | * time. each intermediate class has one vttree. |
| 257 | */ |
| 258 | static void |
| 259 | vttree_insert(struct hfsc_class *cl) |
| 260 | { |
| 261 | struct rb_node **p = &cl->cl_parent->vt_tree.rb_node; |
| 262 | struct rb_node *parent = NULL; |
| 263 | struct hfsc_class *cl1; |
| 264 | |
| 265 | while (*p != NULL) { |
| 266 | parent = *p; |
| 267 | cl1 = rb_entry(parent, struct hfsc_class, vt_node); |
| 268 | if (cl->cl_vt >= cl1->cl_vt) |
| 269 | p = &parent->rb_right; |
| 270 | else |
| 271 | p = &parent->rb_left; |
| 272 | } |
| 273 | rb_link_node(&cl->vt_node, parent, p); |
| 274 | rb_insert_color(&cl->vt_node, &cl->cl_parent->vt_tree); |
| 275 | } |
| 276 | |
| 277 | static inline void |
| 278 | vttree_remove(struct hfsc_class *cl) |
| 279 | { |
| 280 | rb_erase(&cl->vt_node, &cl->cl_parent->vt_tree); |
| 281 | } |
| 282 | |
| 283 | static inline void |
| 284 | vttree_update(struct hfsc_class *cl) |
| 285 | { |
| 286 | vttree_remove(cl); |
| 287 | vttree_insert(cl); |
| 288 | } |
| 289 | |
| 290 | static inline struct hfsc_class * |
| 291 | vttree_firstfit(struct hfsc_class *cl, u64 cur_time) |
| 292 | { |
| 293 | struct hfsc_class *p; |
| 294 | struct rb_node *n; |
| 295 | |
| 296 | for (n = rb_first(&cl->vt_tree); n != NULL; n = rb_next(n)) { |
| 297 | p = rb_entry(n, struct hfsc_class, vt_node); |
| 298 | if (p->cl_f <= cur_time) |
| 299 | return p; |
| 300 | } |
| 301 | return NULL; |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * get the leaf class with the minimum vt in the hierarchy |
| 306 | */ |
| 307 | static struct hfsc_class * |
| 308 | vttree_get_minvt(struct hfsc_class *cl, u64 cur_time) |
| 309 | { |
| 310 | /* if root-class's cfmin is bigger than cur_time nothing to do */ |
| 311 | if (cl->cl_cfmin > cur_time) |
| 312 | return NULL; |
| 313 | |
| 314 | while (cl->level > 0) { |
| 315 | cl = vttree_firstfit(cl, cur_time); |
| 316 | if (cl == NULL) |
| 317 | return NULL; |
| 318 | /* |
| 319 | * update parent's cl_cvtmin. |
| 320 | */ |
| 321 | if (cl->cl_parent->cl_cvtmin < cl->cl_vt) |
| 322 | cl->cl_parent->cl_cvtmin = cl->cl_vt; |
| 323 | } |
| 324 | return cl; |
| 325 | } |
| 326 | |
| 327 | static void |
| 328 | cftree_insert(struct hfsc_class *cl) |
| 329 | { |
| 330 | struct rb_node **p = &cl->cl_parent->cf_tree.rb_node; |
| 331 | struct rb_node *parent = NULL; |
| 332 | struct hfsc_class *cl1; |
| 333 | |
| 334 | while (*p != NULL) { |
| 335 | parent = *p; |
| 336 | cl1 = rb_entry(parent, struct hfsc_class, cf_node); |
| 337 | if (cl->cl_f >= cl1->cl_f) |
| 338 | p = &parent->rb_right; |
| 339 | else |
| 340 | p = &parent->rb_left; |
| 341 | } |
| 342 | rb_link_node(&cl->cf_node, parent, p); |
| 343 | rb_insert_color(&cl->cf_node, &cl->cl_parent->cf_tree); |
| 344 | } |
| 345 | |
| 346 | static inline void |
| 347 | cftree_remove(struct hfsc_class *cl) |
| 348 | { |
| 349 | rb_erase(&cl->cf_node, &cl->cl_parent->cf_tree); |
| 350 | } |
| 351 | |
| 352 | static inline void |
| 353 | cftree_update(struct hfsc_class *cl) |
| 354 | { |
| 355 | cftree_remove(cl); |
| 356 | cftree_insert(cl); |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * service curve support functions |
| 361 | * |
| 362 | * external service curve parameters |
| 363 | * m: bps |
| 364 | * d: us |
| 365 | * internal service curve parameters |
| 366 | * sm: (bytes/psched_us) << SM_SHIFT |
| 367 | * ism: (psched_us/byte) << ISM_SHIFT |
| 368 | * dx: psched_us |
| 369 | * |
Jarek Poplawski | 728bf09 | 2009-06-08 22:05:00 +0000 | [diff] [blame] | 370 | * The clock source resolution with ktime and PSCHED_SHIFT 10 is 1.024us. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | * |
| 372 | * sm and ism are scaled in order to keep effective digits. |
| 373 | * SM_SHIFT and ISM_SHIFT are selected to keep at least 4 effective |
| 374 | * digits in decimal using the following table. |
| 375 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | * bits/sec 100Kbps 1Mbps 10Mbps 100Mbps 1Gbps |
| 377 | * ------------+------------------------------------------------------- |
Patrick McHardy | 641b9e0 | 2007-03-16 01:18:42 -0700 | [diff] [blame] | 378 | * bytes/1.024us 12.8e-3 128e-3 1280e-3 12800e-3 128000e-3 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | * |
Patrick McHardy | 641b9e0 | 2007-03-16 01:18:42 -0700 | [diff] [blame] | 380 | * 1.024us/byte 78.125 7.8125 0.78125 0.078125 0.0078125 |
Jarek Poplawski | 728bf09 | 2009-06-08 22:05:00 +0000 | [diff] [blame] | 381 | * |
| 382 | * So, for PSCHED_SHIFT 10 we need: SM_SHIFT 20, ISM_SHIFT 18. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | */ |
Jarek Poplawski | 728bf09 | 2009-06-08 22:05:00 +0000 | [diff] [blame] | 384 | #define SM_SHIFT (30 - PSCHED_SHIFT) |
| 385 | #define ISM_SHIFT (8 + PSCHED_SHIFT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
| 387 | #define SM_MASK ((1ULL << SM_SHIFT) - 1) |
| 388 | #define ISM_MASK ((1ULL << ISM_SHIFT) - 1) |
| 389 | |
| 390 | static inline u64 |
| 391 | seg_x2y(u64 x, u64 sm) |
| 392 | { |
| 393 | u64 y; |
| 394 | |
| 395 | /* |
| 396 | * compute |
| 397 | * y = x * sm >> SM_SHIFT |
| 398 | * but divide it for the upper and lower bits to avoid overflow |
| 399 | */ |
| 400 | y = (x >> SM_SHIFT) * sm + (((x & SM_MASK) * sm) >> SM_SHIFT); |
| 401 | return y; |
| 402 | } |
| 403 | |
| 404 | static inline u64 |
| 405 | seg_y2x(u64 y, u64 ism) |
| 406 | { |
| 407 | u64 x; |
| 408 | |
| 409 | if (y == 0) |
| 410 | x = 0; |
| 411 | else if (ism == HT_INFINITY) |
| 412 | x = HT_INFINITY; |
| 413 | else { |
| 414 | x = (y >> ISM_SHIFT) * ism |
| 415 | + (((y & ISM_MASK) * ism) >> ISM_SHIFT); |
| 416 | } |
| 417 | return x; |
| 418 | } |
| 419 | |
| 420 | /* Convert m (bps) into sm (bytes/psched us) */ |
| 421 | static u64 |
| 422 | m2sm(u32 m) |
| 423 | { |
| 424 | u64 sm; |
| 425 | |
| 426 | sm = ((u64)m << SM_SHIFT); |
Patrick McHardy | 00c04af | 2007-03-16 01:23:02 -0700 | [diff] [blame] | 427 | sm += PSCHED_TICKS_PER_SEC - 1; |
| 428 | do_div(sm, PSCHED_TICKS_PER_SEC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | return sm; |
| 430 | } |
| 431 | |
| 432 | /* convert m (bps) into ism (psched us/byte) */ |
| 433 | static u64 |
| 434 | m2ism(u32 m) |
| 435 | { |
| 436 | u64 ism; |
| 437 | |
| 438 | if (m == 0) |
| 439 | ism = HT_INFINITY; |
| 440 | else { |
Patrick McHardy | 00c04af | 2007-03-16 01:23:02 -0700 | [diff] [blame] | 441 | ism = ((u64)PSCHED_TICKS_PER_SEC << ISM_SHIFT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | ism += m - 1; |
| 443 | do_div(ism, m); |
| 444 | } |
| 445 | return ism; |
| 446 | } |
| 447 | |
| 448 | /* convert d (us) into dx (psched us) */ |
| 449 | static u64 |
| 450 | d2dx(u32 d) |
| 451 | { |
| 452 | u64 dx; |
| 453 | |
Patrick McHardy | 00c04af | 2007-03-16 01:23:02 -0700 | [diff] [blame] | 454 | dx = ((u64)d * PSCHED_TICKS_PER_SEC); |
Patrick McHardy | 538e43a | 2006-01-08 22:12:03 -0800 | [diff] [blame] | 455 | dx += USEC_PER_SEC - 1; |
| 456 | do_div(dx, USEC_PER_SEC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | return dx; |
| 458 | } |
| 459 | |
| 460 | /* convert sm (bytes/psched us) into m (bps) */ |
| 461 | static u32 |
| 462 | sm2m(u64 sm) |
| 463 | { |
| 464 | u64 m; |
| 465 | |
Patrick McHardy | 00c04af | 2007-03-16 01:23:02 -0700 | [diff] [blame] | 466 | m = (sm * PSCHED_TICKS_PER_SEC) >> SM_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | return (u32)m; |
| 468 | } |
| 469 | |
| 470 | /* convert dx (psched us) into d (us) */ |
| 471 | static u32 |
| 472 | dx2d(u64 dx) |
| 473 | { |
| 474 | u64 d; |
| 475 | |
Patrick McHardy | 538e43a | 2006-01-08 22:12:03 -0800 | [diff] [blame] | 476 | d = dx * USEC_PER_SEC; |
Patrick McHardy | 00c04af | 2007-03-16 01:23:02 -0700 | [diff] [blame] | 477 | do_div(d, PSCHED_TICKS_PER_SEC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | return (u32)d; |
| 479 | } |
| 480 | |
| 481 | static void |
| 482 | sc2isc(struct tc_service_curve *sc, struct internal_sc *isc) |
| 483 | { |
| 484 | isc->sm1 = m2sm(sc->m1); |
| 485 | isc->ism1 = m2ism(sc->m1); |
| 486 | isc->dx = d2dx(sc->d); |
| 487 | isc->dy = seg_x2y(isc->dx, isc->sm1); |
| 488 | isc->sm2 = m2sm(sc->m2); |
| 489 | isc->ism2 = m2ism(sc->m2); |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * initialize the runtime service curve with the given internal |
| 494 | * service curve starting at (x, y). |
| 495 | */ |
| 496 | static void |
| 497 | rtsc_init(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) |
| 498 | { |
| 499 | rtsc->x = x; |
| 500 | rtsc->y = y; |
| 501 | rtsc->sm1 = isc->sm1; |
| 502 | rtsc->ism1 = isc->ism1; |
| 503 | rtsc->dx = isc->dx; |
| 504 | rtsc->dy = isc->dy; |
| 505 | rtsc->sm2 = isc->sm2; |
| 506 | rtsc->ism2 = isc->ism2; |
| 507 | } |
| 508 | |
| 509 | /* |
| 510 | * calculate the y-projection of the runtime service curve by the |
| 511 | * given x-projection value |
| 512 | */ |
| 513 | static u64 |
| 514 | rtsc_y2x(struct runtime_sc *rtsc, u64 y) |
| 515 | { |
| 516 | u64 x; |
| 517 | |
| 518 | if (y < rtsc->y) |
| 519 | x = rtsc->x; |
| 520 | else if (y <= rtsc->y + rtsc->dy) { |
| 521 | /* x belongs to the 1st segment */ |
| 522 | if (rtsc->dy == 0) |
| 523 | x = rtsc->x + rtsc->dx; |
| 524 | else |
| 525 | x = rtsc->x + seg_y2x(y - rtsc->y, rtsc->ism1); |
| 526 | } else { |
| 527 | /* x belongs to the 2nd segment */ |
| 528 | x = rtsc->x + rtsc->dx |
| 529 | + seg_y2x(y - rtsc->y - rtsc->dy, rtsc->ism2); |
| 530 | } |
| 531 | return x; |
| 532 | } |
| 533 | |
| 534 | static u64 |
| 535 | rtsc_x2y(struct runtime_sc *rtsc, u64 x) |
| 536 | { |
| 537 | u64 y; |
| 538 | |
| 539 | if (x <= rtsc->x) |
| 540 | y = rtsc->y; |
| 541 | else if (x <= rtsc->x + rtsc->dx) |
| 542 | /* y belongs to the 1st segment */ |
| 543 | y = rtsc->y + seg_x2y(x - rtsc->x, rtsc->sm1); |
| 544 | else |
| 545 | /* y belongs to the 2nd segment */ |
| 546 | y = rtsc->y + rtsc->dy |
| 547 | + seg_x2y(x - rtsc->x - rtsc->dx, rtsc->sm2); |
| 548 | return y; |
| 549 | } |
| 550 | |
| 551 | /* |
| 552 | * update the runtime service curve by taking the minimum of the current |
| 553 | * runtime service curve and the service curve starting at (x, y). |
| 554 | */ |
| 555 | static void |
| 556 | rtsc_min(struct runtime_sc *rtsc, struct internal_sc *isc, u64 x, u64 y) |
| 557 | { |
| 558 | u64 y1, y2, dx, dy; |
| 559 | u32 dsm; |
| 560 | |
| 561 | if (isc->sm1 <= isc->sm2) { |
| 562 | /* service curve is convex */ |
| 563 | y1 = rtsc_x2y(rtsc, x); |
| 564 | if (y1 < y) |
| 565 | /* the current rtsc is smaller */ |
| 566 | return; |
| 567 | rtsc->x = x; |
| 568 | rtsc->y = y; |
| 569 | return; |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * service curve is concave |
| 574 | * compute the two y values of the current rtsc |
| 575 | * y1: at x |
| 576 | * y2: at (x + dx) |
| 577 | */ |
| 578 | y1 = rtsc_x2y(rtsc, x); |
| 579 | if (y1 <= y) { |
| 580 | /* rtsc is below isc, no change to rtsc */ |
| 581 | return; |
| 582 | } |
| 583 | |
| 584 | y2 = rtsc_x2y(rtsc, x + isc->dx); |
| 585 | if (y2 >= y + isc->dy) { |
| 586 | /* rtsc is above isc, replace rtsc by isc */ |
| 587 | rtsc->x = x; |
| 588 | rtsc->y = y; |
| 589 | rtsc->dx = isc->dx; |
| 590 | rtsc->dy = isc->dy; |
| 591 | return; |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * the two curves intersect |
| 596 | * compute the offsets (dx, dy) using the reverse |
| 597 | * function of seg_x2y() |
| 598 | * seg_x2y(dx, sm1) == seg_x2y(dx, sm2) + (y1 - y) |
| 599 | */ |
| 600 | dx = (y1 - y) << SM_SHIFT; |
| 601 | dsm = isc->sm1 - isc->sm2; |
| 602 | do_div(dx, dsm); |
| 603 | /* |
| 604 | * check if (x, y1) belongs to the 1st segment of rtsc. |
| 605 | * if so, add the offset. |
| 606 | */ |
| 607 | if (rtsc->x + rtsc->dx > x) |
| 608 | dx += rtsc->x + rtsc->dx - x; |
| 609 | dy = seg_x2y(dx, isc->sm1); |
| 610 | |
| 611 | rtsc->x = x; |
| 612 | rtsc->y = y; |
| 613 | rtsc->dx = dx; |
| 614 | rtsc->dy = dy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
| 617 | static void |
| 618 | init_ed(struct hfsc_class *cl, unsigned int next_len) |
| 619 | { |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 620 | u64 cur_time = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | |
| 622 | /* update the deadline curve */ |
| 623 | rtsc_min(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); |
| 624 | |
| 625 | /* |
| 626 | * update the eligible curve. |
| 627 | * for concave, it is equal to the deadline curve. |
| 628 | * for convex, it is a linear curve with slope m2. |
| 629 | */ |
| 630 | cl->cl_eligible = cl->cl_deadline; |
| 631 | if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { |
| 632 | cl->cl_eligible.dx = 0; |
| 633 | cl->cl_eligible.dy = 0; |
| 634 | } |
| 635 | |
| 636 | /* compute e and d */ |
| 637 | cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); |
| 638 | cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); |
| 639 | |
| 640 | eltree_insert(cl); |
| 641 | } |
| 642 | |
| 643 | static void |
| 644 | update_ed(struct hfsc_class *cl, unsigned int next_len) |
| 645 | { |
| 646 | cl->cl_e = rtsc_y2x(&cl->cl_eligible, cl->cl_cumul); |
| 647 | cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); |
| 648 | |
| 649 | eltree_update(cl); |
| 650 | } |
| 651 | |
| 652 | static inline void |
| 653 | update_d(struct hfsc_class *cl, unsigned int next_len) |
| 654 | { |
| 655 | cl->cl_d = rtsc_y2x(&cl->cl_deadline, cl->cl_cumul + next_len); |
| 656 | } |
| 657 | |
| 658 | static inline void |
| 659 | update_cfmin(struct hfsc_class *cl) |
| 660 | { |
| 661 | struct rb_node *n = rb_first(&cl->cf_tree); |
| 662 | struct hfsc_class *p; |
| 663 | |
| 664 | if (n == NULL) { |
| 665 | cl->cl_cfmin = 0; |
| 666 | return; |
| 667 | } |
| 668 | p = rb_entry(n, struct hfsc_class, cf_node); |
| 669 | cl->cl_cfmin = p->cl_f; |
| 670 | } |
| 671 | |
| 672 | static void |
| 673 | init_vf(struct hfsc_class *cl, unsigned int len) |
| 674 | { |
| 675 | struct hfsc_class *max_cl; |
| 676 | struct rb_node *n; |
| 677 | u64 vt, f, cur_time; |
| 678 | int go_active; |
| 679 | |
| 680 | cur_time = 0; |
| 681 | go_active = 1; |
| 682 | for (; cl->cl_parent != NULL; cl = cl->cl_parent) { |
| 683 | if (go_active && cl->cl_nactive++ == 0) |
| 684 | go_active = 1; |
| 685 | else |
| 686 | go_active = 0; |
| 687 | |
| 688 | if (go_active) { |
| 689 | n = rb_last(&cl->cl_parent->vt_tree); |
| 690 | if (n != NULL) { |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 691 | max_cl = rb_entry(n, struct hfsc_class, vt_node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | /* |
| 693 | * set vt to the average of the min and max |
| 694 | * classes. if the parent's period didn't |
| 695 | * change, don't decrease vt of the class. |
| 696 | */ |
| 697 | vt = max_cl->cl_vt; |
| 698 | if (cl->cl_parent->cl_cvtmin != 0) |
| 699 | vt = (cl->cl_parent->cl_cvtmin + vt)/2; |
| 700 | |
| 701 | if (cl->cl_parent->cl_vtperiod != |
| 702 | cl->cl_parentperiod || vt > cl->cl_vt) |
| 703 | cl->cl_vt = vt; |
| 704 | } else { |
| 705 | /* |
| 706 | * first child for a new parent backlog period. |
| 707 | * add parent's cvtmax to cvtoff to make a new |
| 708 | * vt (vtoff + vt) larger than the vt in the |
| 709 | * last period for all children. |
| 710 | */ |
| 711 | vt = cl->cl_parent->cl_cvtmax; |
| 712 | cl->cl_parent->cl_cvtoff += vt; |
| 713 | cl->cl_parent->cl_cvtmax = 0; |
| 714 | cl->cl_parent->cl_cvtmin = 0; |
| 715 | cl->cl_vt = 0; |
| 716 | } |
| 717 | |
| 718 | cl->cl_vtoff = cl->cl_parent->cl_cvtoff - |
| 719 | cl->cl_pcvtoff; |
| 720 | |
| 721 | /* update the virtual curve */ |
| 722 | vt = cl->cl_vt + cl->cl_vtoff; |
| 723 | rtsc_min(&cl->cl_virtual, &cl->cl_fsc, vt, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 724 | cl->cl_total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if (cl->cl_virtual.x == vt) { |
| 726 | cl->cl_virtual.x -= cl->cl_vtoff; |
| 727 | cl->cl_vtoff = 0; |
| 728 | } |
| 729 | cl->cl_vtadj = 0; |
| 730 | |
| 731 | cl->cl_vtperiod++; /* increment vt period */ |
| 732 | cl->cl_parentperiod = cl->cl_parent->cl_vtperiod; |
| 733 | if (cl->cl_parent->cl_nactive == 0) |
| 734 | cl->cl_parentperiod++; |
| 735 | cl->cl_f = 0; |
| 736 | |
| 737 | vttree_insert(cl); |
| 738 | cftree_insert(cl); |
| 739 | |
| 740 | if (cl->cl_flags & HFSC_USC) { |
| 741 | /* class has upper limit curve */ |
| 742 | if (cur_time == 0) |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 743 | cur_time = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | /* update the ulimit curve */ |
| 746 | rtsc_min(&cl->cl_ulimit, &cl->cl_usc, cur_time, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 747 | cl->cl_total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | /* compute myf */ |
| 749 | cl->cl_myf = rtsc_y2x(&cl->cl_ulimit, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 750 | cl->cl_total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | cl->cl_myfadj = 0; |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | f = max(cl->cl_myf, cl->cl_cfmin); |
| 756 | if (f != cl->cl_f) { |
| 757 | cl->cl_f = f; |
| 758 | cftree_update(cl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
Michal Soltys | 3b2eb61 | 2010-08-30 11:34:10 +0000 | [diff] [blame] | 760 | update_cfmin(cl->cl_parent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | } |
| 762 | } |
| 763 | |
| 764 | static void |
| 765 | update_vf(struct hfsc_class *cl, unsigned int len, u64 cur_time) |
| 766 | { |
| 767 | u64 f; /* , myf_bound, delta; */ |
| 768 | int go_passive = 0; |
| 769 | |
| 770 | if (cl->qdisc->q.qlen == 0 && cl->cl_flags & HFSC_FSC) |
| 771 | go_passive = 1; |
| 772 | |
| 773 | for (; cl->cl_parent != NULL; cl = cl->cl_parent) { |
| 774 | cl->cl_total += len; |
| 775 | |
| 776 | if (!(cl->cl_flags & HFSC_FSC) || cl->cl_nactive == 0) |
| 777 | continue; |
| 778 | |
| 779 | if (go_passive && --cl->cl_nactive == 0) |
| 780 | go_passive = 1; |
| 781 | else |
| 782 | go_passive = 0; |
| 783 | |
| 784 | if (go_passive) { |
| 785 | /* no more active child, going passive */ |
| 786 | |
| 787 | /* update cvtmax of the parent class */ |
| 788 | if (cl->cl_vt > cl->cl_parent->cl_cvtmax) |
| 789 | cl->cl_parent->cl_cvtmax = cl->cl_vt; |
| 790 | |
| 791 | /* remove this class from the vt tree */ |
| 792 | vttree_remove(cl); |
| 793 | |
| 794 | cftree_remove(cl); |
| 795 | update_cfmin(cl->cl_parent); |
| 796 | |
| 797 | continue; |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * update vt and f |
| 802 | */ |
| 803 | cl->cl_vt = rtsc_y2x(&cl->cl_virtual, cl->cl_total) |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 804 | - cl->cl_vtoff + cl->cl_vtadj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
| 806 | /* |
| 807 | * if vt of the class is smaller than cvtmin, |
| 808 | * the class was skipped in the past due to non-fit. |
| 809 | * if so, we need to adjust vtadj. |
| 810 | */ |
| 811 | if (cl->cl_vt < cl->cl_parent->cl_cvtmin) { |
| 812 | cl->cl_vtadj += cl->cl_parent->cl_cvtmin - cl->cl_vt; |
| 813 | cl->cl_vt = cl->cl_parent->cl_cvtmin; |
| 814 | } |
| 815 | |
| 816 | /* update the vt tree */ |
| 817 | vttree_update(cl); |
| 818 | |
| 819 | if (cl->cl_flags & HFSC_USC) { |
| 820 | cl->cl_myf = cl->cl_myfadj + rtsc_y2x(&cl->cl_ulimit, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 821 | cl->cl_total); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | #if 0 |
| 823 | /* |
| 824 | * This code causes classes to stay way under their |
| 825 | * limit when multiple classes are used at gigabit |
| 826 | * speed. needs investigation. -kaber |
| 827 | */ |
| 828 | /* |
| 829 | * if myf lags behind by more than one clock tick |
| 830 | * from the current time, adjust myfadj to prevent |
| 831 | * a rate-limited class from going greedy. |
| 832 | * in a steady state under rate-limiting, myf |
| 833 | * fluctuates within one clock tick. |
| 834 | */ |
| 835 | myf_bound = cur_time - PSCHED_JIFFIE2US(1); |
| 836 | if (cl->cl_myf < myf_bound) { |
| 837 | delta = cur_time - cl->cl_myf; |
| 838 | cl->cl_myfadj += delta; |
| 839 | cl->cl_myf += delta; |
| 840 | } |
| 841 | #endif |
| 842 | } |
| 843 | |
| 844 | f = max(cl->cl_myf, cl->cl_cfmin); |
| 845 | if (f != cl->cl_f) { |
| 846 | cl->cl_f = f; |
| 847 | cftree_update(cl); |
| 848 | update_cfmin(cl->cl_parent); |
| 849 | } |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | static void |
| 854 | set_active(struct hfsc_class *cl, unsigned int len) |
| 855 | { |
| 856 | if (cl->cl_flags & HFSC_RSC) |
| 857 | init_ed(cl, len); |
| 858 | if (cl->cl_flags & HFSC_FSC) |
| 859 | init_vf(cl, len); |
| 860 | |
| 861 | list_add_tail(&cl->dlist, &cl->sched->droplist); |
| 862 | } |
| 863 | |
| 864 | static void |
| 865 | set_passive(struct hfsc_class *cl) |
| 866 | { |
| 867 | if (cl->cl_flags & HFSC_RSC) |
| 868 | eltree_remove(cl); |
| 869 | |
| 870 | list_del(&cl->dlist); |
| 871 | |
| 872 | /* |
| 873 | * vttree is now handled in update_vf() so that update_vf(cl, 0, 0) |
| 874 | * needs to be called explicitly to remove a class from vttree. |
| 875 | */ |
| 876 | } |
| 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | static unsigned int |
| 879 | qdisc_peek_len(struct Qdisc *sch) |
| 880 | { |
| 881 | struct sk_buff *skb; |
| 882 | unsigned int len; |
| 883 | |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 884 | skb = sch->ops->peek(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | if (skb == NULL) { |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 886 | qdisc_warn_nonwc("qdisc_peek_len", sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | return 0; |
| 888 | } |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 889 | len = qdisc_pkt_len(skb); |
Jarek Poplawski | 03c05f0 | 2008-10-31 00:46:19 -0700 | [diff] [blame] | 890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | return len; |
| 892 | } |
| 893 | |
| 894 | static void |
| 895 | hfsc_purge_queue(struct Qdisc *sch, struct hfsc_class *cl) |
| 896 | { |
| 897 | unsigned int len = cl->qdisc->q.qlen; |
WANG Cong | 2ccccf5 | 2016-02-25 14:55:01 -0800 | [diff] [blame] | 898 | unsigned int backlog = cl->qdisc->qstats.backlog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
| 900 | qdisc_reset(cl->qdisc); |
WANG Cong | 2ccccf5 | 2016-02-25 14:55:01 -0800 | [diff] [blame] | 901 | qdisc_tree_reduce_backlog(cl->qdisc, len, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | static void |
| 905 | hfsc_adjust_levels(struct hfsc_class *cl) |
| 906 | { |
| 907 | struct hfsc_class *p; |
| 908 | unsigned int level; |
| 909 | |
| 910 | do { |
| 911 | level = 0; |
| 912 | list_for_each_entry(p, &cl->children, siblings) { |
Patrick McHardy | 210525d | 2006-05-11 12:22:03 -0700 | [diff] [blame] | 913 | if (p->level >= level) |
| 914 | level = p->level + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
Patrick McHardy | 210525d | 2006-05-11 12:22:03 -0700 | [diff] [blame] | 916 | cl->level = level; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } while ((cl = cl->cl_parent) != NULL); |
| 918 | } |
| 919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | static inline struct hfsc_class * |
| 921 | hfsc_find_class(u32 classid, struct Qdisc *sch) |
| 922 | { |
| 923 | struct hfsc_sched *q = qdisc_priv(sch); |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 924 | struct Qdisc_class_common *clc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 926 | clc = qdisc_class_find(&q->clhash, classid); |
| 927 | if (clc == NULL) |
| 928 | return NULL; |
| 929 | return container_of(clc, struct hfsc_class, cl_common); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | static void |
| 933 | hfsc_change_rsc(struct hfsc_class *cl, struct tc_service_curve *rsc, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 934 | u64 cur_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | { |
| 936 | sc2isc(rsc, &cl->cl_rsc); |
| 937 | rtsc_init(&cl->cl_deadline, &cl->cl_rsc, cur_time, cl->cl_cumul); |
| 938 | cl->cl_eligible = cl->cl_deadline; |
| 939 | if (cl->cl_rsc.sm1 <= cl->cl_rsc.sm2) { |
| 940 | cl->cl_eligible.dx = 0; |
| 941 | cl->cl_eligible.dy = 0; |
| 942 | } |
| 943 | cl->cl_flags |= HFSC_RSC; |
| 944 | } |
| 945 | |
| 946 | static void |
| 947 | hfsc_change_fsc(struct hfsc_class *cl, struct tc_service_curve *fsc) |
| 948 | { |
| 949 | sc2isc(fsc, &cl->cl_fsc); |
| 950 | rtsc_init(&cl->cl_virtual, &cl->cl_fsc, cl->cl_vt, cl->cl_total); |
| 951 | cl->cl_flags |= HFSC_FSC; |
| 952 | } |
| 953 | |
| 954 | static void |
| 955 | hfsc_change_usc(struct hfsc_class *cl, struct tc_service_curve *usc, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 956 | u64 cur_time) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | { |
| 958 | sc2isc(usc, &cl->cl_usc); |
| 959 | rtsc_init(&cl->cl_ulimit, &cl->cl_usc, cur_time, cl->cl_total); |
| 960 | cl->cl_flags |= HFSC_USC; |
| 961 | } |
| 962 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 963 | static const struct nla_policy hfsc_policy[TCA_HFSC_MAX + 1] = { |
| 964 | [TCA_HFSC_RSC] = { .len = sizeof(struct tc_service_curve) }, |
| 965 | [TCA_HFSC_FSC] = { .len = sizeof(struct tc_service_curve) }, |
| 966 | [TCA_HFSC_USC] = { .len = sizeof(struct tc_service_curve) }, |
| 967 | }; |
| 968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | static int |
| 970 | hfsc_change_class(struct Qdisc *sch, u32 classid, u32 parentid, |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 971 | struct nlattr **tca, unsigned long *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | { |
| 973 | struct hfsc_sched *q = qdisc_priv(sch); |
| 974 | struct hfsc_class *cl = (struct hfsc_class *)*arg; |
| 975 | struct hfsc_class *parent = NULL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 976 | struct nlattr *opt = tca[TCA_OPTIONS]; |
| 977 | struct nlattr *tb[TCA_HFSC_MAX + 1]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | struct tc_service_curve *rsc = NULL, *fsc = NULL, *usc = NULL; |
| 979 | u64 cur_time; |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 980 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 982 | if (opt == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | return -EINVAL; |
| 984 | |
Patrick McHardy | 27a3421 | 2008-01-23 20:35:39 -0800 | [diff] [blame] | 985 | err = nla_parse_nested(tb, TCA_HFSC_MAX, opt, hfsc_policy); |
Patrick McHardy | cee6372 | 2008-01-23 20:33:32 -0800 | [diff] [blame] | 986 | if (err < 0) |
| 987 | return err; |
| 988 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 989 | if (tb[TCA_HFSC_RSC]) { |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 990 | rsc = nla_data(tb[TCA_HFSC_RSC]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | if (rsc->m1 == 0 && rsc->m2 == 0) |
| 992 | rsc = NULL; |
| 993 | } |
| 994 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 995 | if (tb[TCA_HFSC_FSC]) { |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 996 | fsc = nla_data(tb[TCA_HFSC_FSC]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | if (fsc->m1 == 0 && fsc->m2 == 0) |
| 998 | fsc = NULL; |
| 999 | } |
| 1000 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1001 | if (tb[TCA_HFSC_USC]) { |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1002 | usc = nla_data(tb[TCA_HFSC_USC]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | if (usc->m1 == 0 && usc->m2 == 0) |
| 1004 | usc = NULL; |
| 1005 | } |
| 1006 | |
| 1007 | if (cl != NULL) { |
| 1008 | if (parentid) { |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1009 | if (cl->cl_parent && |
| 1010 | cl->cl_parent->cl_common.classid != parentid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | return -EINVAL; |
| 1012 | if (cl->cl_parent == NULL && parentid != TC_H_ROOT) |
| 1013 | return -EINVAL; |
| 1014 | } |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 1015 | cur_time = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1017 | if (tca[TCA_RATE]) { |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 1018 | spinlock_t *lock = qdisc_root_sleeping_lock(sch); |
| 1019 | |
| 1020 | err = gen_replace_estimator(&cl->bstats, NULL, |
| 1021 | &cl->rate_est, |
| 1022 | lock, |
| 1023 | tca[TCA_RATE]); |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1024 | if (err) |
| 1025 | return err; |
| 1026 | } |
| 1027 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | sch_tree_lock(sch); |
| 1029 | if (rsc != NULL) |
| 1030 | hfsc_change_rsc(cl, rsc, cur_time); |
| 1031 | if (fsc != NULL) |
| 1032 | hfsc_change_fsc(cl, fsc); |
| 1033 | if (usc != NULL) |
| 1034 | hfsc_change_usc(cl, usc, cur_time); |
| 1035 | |
| 1036 | if (cl->qdisc->q.qlen != 0) { |
| 1037 | if (cl->cl_flags & HFSC_RSC) |
| 1038 | update_ed(cl, qdisc_peek_len(cl->qdisc)); |
| 1039 | if (cl->cl_flags & HFSC_FSC) |
| 1040 | update_vf(cl, 0, cur_time); |
| 1041 | } |
| 1042 | sch_tree_unlock(sch); |
| 1043 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | return 0; |
| 1045 | } |
| 1046 | |
| 1047 | if (parentid == TC_H_ROOT) |
| 1048 | return -EEXIST; |
| 1049 | |
| 1050 | parent = &q->root; |
| 1051 | if (parentid) { |
| 1052 | parent = hfsc_find_class(parentid, sch); |
| 1053 | if (parent == NULL) |
| 1054 | return -ENOENT; |
| 1055 | } |
| 1056 | |
| 1057 | if (classid == 0 || TC_H_MAJ(classid ^ sch->handle) != 0) |
| 1058 | return -EINVAL; |
| 1059 | if (hfsc_find_class(classid, sch)) |
| 1060 | return -EEXIST; |
| 1061 | |
| 1062 | if (rsc == NULL && fsc == NULL) |
| 1063 | return -EINVAL; |
| 1064 | |
Panagiotis Issaris | 0da974f | 2006-07-21 14:51:30 -0700 | [diff] [blame] | 1065 | cl = kzalloc(sizeof(struct hfsc_class), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | if (cl == NULL) |
| 1067 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1069 | if (tca[TCA_RATE]) { |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 1070 | err = gen_new_estimator(&cl->bstats, NULL, &cl->rate_est, |
Stephen Hemminger | 71bcb09 | 2008-11-25 21:13:31 -0800 | [diff] [blame] | 1071 | qdisc_root_sleeping_lock(sch), |
| 1072 | tca[TCA_RATE]); |
| 1073 | if (err) { |
| 1074 | kfree(cl); |
| 1075 | return err; |
| 1076 | } |
| 1077 | } |
| 1078 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | if (rsc != NULL) |
| 1080 | hfsc_change_rsc(cl, rsc, 0); |
| 1081 | if (fsc != NULL) |
| 1082 | hfsc_change_fsc(cl, fsc); |
| 1083 | if (usc != NULL) |
| 1084 | hfsc_change_usc(cl, usc, 0); |
| 1085 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1086 | cl->cl_common.classid = classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | cl->refcnt = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | cl->sched = q; |
| 1089 | cl->cl_parent = parent; |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1090 | cl->qdisc = qdisc_create_dflt(sch->dev_queue, |
David S. Miller | bb949fb | 2008-07-08 16:55:56 -0700 | [diff] [blame] | 1091 | &pfifo_qdisc_ops, classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | if (cl->qdisc == NULL) |
| 1093 | cl->qdisc = &noop_qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | INIT_LIST_HEAD(&cl->children); |
| 1095 | cl->vt_tree = RB_ROOT; |
| 1096 | cl->cf_tree = RB_ROOT; |
| 1097 | |
| 1098 | sch_tree_lock(sch); |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1099 | qdisc_class_hash_insert(&q->clhash, &cl->cl_common); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | list_add_tail(&cl->siblings, &parent->children); |
| 1101 | if (parent->level == 0) |
| 1102 | hfsc_purge_queue(sch, parent); |
| 1103 | hfsc_adjust_levels(parent); |
| 1104 | cl->cl_pcvtoff = parent->cl_cvtoff; |
| 1105 | sch_tree_unlock(sch); |
| 1106 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1107 | qdisc_class_hash_grow(sch, &q->clhash); |
| 1108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | *arg = (unsigned long)cl; |
| 1110 | return 0; |
| 1111 | } |
| 1112 | |
| 1113 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | hfsc_destroy_class(struct Qdisc *sch, struct hfsc_class *cl) |
| 1115 | { |
| 1116 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1117 | |
Patrick McHardy | ff31ab5 | 2008-07-01 19:52:38 -0700 | [diff] [blame] | 1118 | tcf_destroy_chain(&cl->filter_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | qdisc_destroy(cl->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | gen_kill_estimator(&cl->bstats, &cl->rate_est); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | if (cl != &q->root) |
| 1122 | kfree(cl); |
| 1123 | } |
| 1124 | |
| 1125 | static int |
| 1126 | hfsc_delete_class(struct Qdisc *sch, unsigned long arg) |
| 1127 | { |
| 1128 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1129 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1130 | |
| 1131 | if (cl->level > 0 || cl->filter_cnt > 0 || cl == &q->root) |
| 1132 | return -EBUSY; |
| 1133 | |
| 1134 | sch_tree_lock(sch); |
| 1135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | list_del(&cl->siblings); |
| 1137 | hfsc_adjust_levels(cl->cl_parent); |
Patrick McHardy | c38c83c | 2007-03-27 14:04:24 -0700 | [diff] [blame] | 1138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | hfsc_purge_queue(sch, cl); |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1140 | qdisc_class_hash_remove(&q->clhash, &cl->cl_common); |
Patrick McHardy | c38c83c | 2007-03-27 14:04:24 -0700 | [diff] [blame] | 1141 | |
Jarek Poplawski | 7cd0a63 | 2009-03-15 20:00:19 -0700 | [diff] [blame] | 1142 | BUG_ON(--cl->refcnt == 0); |
| 1143 | /* |
| 1144 | * This shouldn't happen: we "hold" one cops->get() when called |
| 1145 | * from tc_ctl_tclass; the destroy method is done from cops->put(). |
| 1146 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
| 1148 | sch_tree_unlock(sch); |
| 1149 | return 0; |
| 1150 | } |
| 1151 | |
| 1152 | static struct hfsc_class * |
| 1153 | hfsc_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) |
| 1154 | { |
| 1155 | struct hfsc_sched *q = qdisc_priv(sch); |
Patrick McHardy | a2f7922 | 2010-05-14 08:08:14 +0000 | [diff] [blame] | 1156 | struct hfsc_class *head, *cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | struct tcf_result res; |
| 1158 | struct tcf_proto *tcf; |
| 1159 | int result; |
| 1160 | |
| 1161 | if (TC_H_MAJ(skb->priority ^ sch->handle) == 0 && |
| 1162 | (cl = hfsc_find_class(skb->priority, sch)) != NULL) |
| 1163 | if (cl->level == 0) |
| 1164 | return cl; |
| 1165 | |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 1166 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; |
Patrick McHardy | a2f7922 | 2010-05-14 08:08:14 +0000 | [diff] [blame] | 1167 | head = &q->root; |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 1168 | tcf = rcu_dereference_bh(q->root.filter_list); |
Daniel Borkmann | 3b3ae88 | 2015-08-26 23:00:06 +0200 | [diff] [blame] | 1169 | while (tcf && (result = tc_classify(skb, tcf, &res, false)) >= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | #ifdef CONFIG_NET_CLS_ACT |
| 1171 | switch (result) { |
| 1172 | case TC_ACT_QUEUED: |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1173 | case TC_ACT_STOLEN: |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 1174 | *qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN; |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1175 | case TC_ACT_SHOT: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | return NULL; |
| 1177 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | #endif |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1179 | cl = (struct hfsc_class *)res.class; |
| 1180 | if (!cl) { |
| 1181 | cl = hfsc_find_class(res.classid, sch); |
| 1182 | if (!cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | break; /* filter selected invalid classid */ |
Patrick McHardy | a2f7922 | 2010-05-14 08:08:14 +0000 | [diff] [blame] | 1184 | if (cl->level >= head->level) |
| 1185 | break; /* filter may only point downwards */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | } |
| 1187 | |
| 1188 | if (cl->level == 0) |
| 1189 | return cl; /* hit leaf class */ |
| 1190 | |
| 1191 | /* apply inner filter chain */ |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 1192 | tcf = rcu_dereference_bh(cl->filter_list); |
Patrick McHardy | a2f7922 | 2010-05-14 08:08:14 +0000 | [diff] [blame] | 1193 | head = cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | /* classification failed, try default class */ |
| 1197 | cl = hfsc_find_class(TC_H_MAKE(TC_H_MAJ(sch->handle), q->defcls), sch); |
| 1198 | if (cl == NULL || cl->level > 0) |
| 1199 | return NULL; |
| 1200 | |
| 1201 | return cl; |
| 1202 | } |
| 1203 | |
| 1204 | static int |
| 1205 | hfsc_graft_class(struct Qdisc *sch, unsigned long arg, struct Qdisc *new, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1206 | struct Qdisc **old) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | { |
| 1208 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | if (cl->level > 0) |
| 1211 | return -EINVAL; |
| 1212 | if (new == NULL) { |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1213 | new = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1214 | cl->cl_common.classid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | if (new == NULL) |
| 1216 | new = &noop_qdisc; |
| 1217 | } |
| 1218 | |
WANG Cong | 86a7996 | 2016-02-25 14:55:00 -0800 | [diff] [blame] | 1219 | *old = qdisc_replace(sch, new, &cl->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | return 0; |
| 1221 | } |
| 1222 | |
| 1223 | static struct Qdisc * |
| 1224 | hfsc_class_leaf(struct Qdisc *sch, unsigned long arg) |
| 1225 | { |
| 1226 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1227 | |
Patrick McHardy | 5b9a9cc | 2009-09-04 06:41:17 +0000 | [diff] [blame] | 1228 | if (cl->level == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | return cl->qdisc; |
| 1230 | |
| 1231 | return NULL; |
| 1232 | } |
| 1233 | |
Patrick McHardy | f973b91 | 2006-11-29 17:36:43 -0800 | [diff] [blame] | 1234 | static void |
| 1235 | hfsc_qlen_notify(struct Qdisc *sch, unsigned long arg) |
| 1236 | { |
| 1237 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1238 | |
| 1239 | if (cl->qdisc->q.qlen == 0) { |
| 1240 | update_vf(cl, 0, 0); |
| 1241 | set_passive(cl); |
| 1242 | } |
| 1243 | } |
| 1244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1245 | static unsigned long |
| 1246 | hfsc_get_class(struct Qdisc *sch, u32 classid) |
| 1247 | { |
| 1248 | struct hfsc_class *cl = hfsc_find_class(classid, sch); |
| 1249 | |
| 1250 | if (cl != NULL) |
| 1251 | cl->refcnt++; |
| 1252 | |
| 1253 | return (unsigned long)cl; |
| 1254 | } |
| 1255 | |
| 1256 | static void |
| 1257 | hfsc_put_class(struct Qdisc *sch, unsigned long arg) |
| 1258 | { |
| 1259 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1260 | |
| 1261 | if (--cl->refcnt == 0) |
| 1262 | hfsc_destroy_class(sch, cl); |
| 1263 | } |
| 1264 | |
| 1265 | static unsigned long |
| 1266 | hfsc_bind_tcf(struct Qdisc *sch, unsigned long parent, u32 classid) |
| 1267 | { |
| 1268 | struct hfsc_class *p = (struct hfsc_class *)parent; |
| 1269 | struct hfsc_class *cl = hfsc_find_class(classid, sch); |
| 1270 | |
| 1271 | if (cl != NULL) { |
| 1272 | if (p != NULL && p->level <= cl->level) |
| 1273 | return 0; |
| 1274 | cl->filter_cnt++; |
| 1275 | } |
| 1276 | |
| 1277 | return (unsigned long)cl; |
| 1278 | } |
| 1279 | |
| 1280 | static void |
| 1281 | hfsc_unbind_tcf(struct Qdisc *sch, unsigned long arg) |
| 1282 | { |
| 1283 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1284 | |
| 1285 | cl->filter_cnt--; |
| 1286 | } |
| 1287 | |
John Fastabend | 25d8c0d | 2014-09-12 20:05:27 -0700 | [diff] [blame] | 1288 | static struct tcf_proto __rcu ** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | hfsc_tcf_chain(struct Qdisc *sch, unsigned long arg) |
| 1290 | { |
| 1291 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1292 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1293 | |
| 1294 | if (cl == NULL) |
| 1295 | cl = &q->root; |
| 1296 | |
| 1297 | return &cl->filter_list; |
| 1298 | } |
| 1299 | |
| 1300 | static int |
| 1301 | hfsc_dump_sc(struct sk_buff *skb, int attr, struct internal_sc *sc) |
| 1302 | { |
| 1303 | struct tc_service_curve tsc; |
| 1304 | |
| 1305 | tsc.m1 = sm2m(sc->sm1); |
| 1306 | tsc.d = dx2d(sc->dx); |
| 1307 | tsc.m2 = sm2m(sc->sm2); |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1308 | if (nla_put(skb, attr, sizeof(tsc), &tsc)) |
| 1309 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | |
| 1311 | return skb->len; |
| 1312 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1313 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return -1; |
| 1315 | } |
| 1316 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1317 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | hfsc_dump_curves(struct sk_buff *skb, struct hfsc_class *cl) |
| 1319 | { |
| 1320 | if ((cl->cl_flags & HFSC_RSC) && |
| 1321 | (hfsc_dump_sc(skb, TCA_HFSC_RSC, &cl->cl_rsc) < 0)) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1322 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
| 1324 | if ((cl->cl_flags & HFSC_FSC) && |
| 1325 | (hfsc_dump_sc(skb, TCA_HFSC_FSC, &cl->cl_fsc) < 0)) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1326 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | |
| 1328 | if ((cl->cl_flags & HFSC_USC) && |
| 1329 | (hfsc_dump_sc(skb, TCA_HFSC_USC, &cl->cl_usc) < 0)) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1330 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | |
| 1332 | return skb->len; |
| 1333 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1334 | nla_put_failure: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | return -1; |
| 1336 | } |
| 1337 | |
| 1338 | static int |
| 1339 | hfsc_dump_class(struct Qdisc *sch, unsigned long arg, struct sk_buff *skb, |
YOSHIFUJI Hideaki | 10297b9 | 2007-02-09 23:25:16 +0900 | [diff] [blame] | 1340 | struct tcmsg *tcm) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | { |
| 1342 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1343 | struct nlattr *nest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1345 | tcm->tcm_parent = cl->cl_parent ? cl->cl_parent->cl_common.classid : |
| 1346 | TC_H_ROOT; |
| 1347 | tcm->tcm_handle = cl->cl_common.classid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | if (cl->level == 0) |
| 1349 | tcm->tcm_info = cl->qdisc->handle; |
| 1350 | |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1351 | nest = nla_nest_start(skb, TCA_OPTIONS); |
| 1352 | if (nest == NULL) |
| 1353 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | if (hfsc_dump_curves(skb, cl) < 0) |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1355 | goto nla_put_failure; |
Yang Yingliang | d59b7d8 | 2014-03-12 10:20:32 +0800 | [diff] [blame] | 1356 | return nla_nest_end(skb, nest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1358 | nla_put_failure: |
Patrick McHardy | 4b3550ef | 2008-01-23 20:34:11 -0800 | [diff] [blame] | 1359 | nla_nest_cancel(skb, nest); |
Thomas Graf | bc3ed28 | 2008-06-03 16:36:54 -0700 | [diff] [blame] | 1360 | return -EMSGSIZE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | } |
| 1362 | |
| 1363 | static int |
| 1364 | hfsc_dump_class_stats(struct Qdisc *sch, unsigned long arg, |
| 1365 | struct gnet_dump *d) |
| 1366 | { |
| 1367 | struct hfsc_class *cl = (struct hfsc_class *)arg; |
| 1368 | struct tc_hfsc_stats xstats; |
| 1369 | |
Eric Dumazet | f5a59b7 | 2011-12-23 05:19:20 +0000 | [diff] [blame] | 1370 | cl->qstats.backlog = cl->qdisc->qstats.backlog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | xstats.level = cl->level; |
| 1372 | xstats.period = cl->cl_vtperiod; |
| 1373 | xstats.work = cl->cl_total; |
| 1374 | xstats.rtwork = cl->cl_cumul; |
| 1375 | |
John Fastabend | 22e0f8b | 2014-09-28 11:52:56 -0700 | [diff] [blame] | 1376 | if (gnet_stats_copy_basic(d, NULL, &cl->bstats) < 0 || |
Eric Dumazet | d250a5f | 2009-10-02 10:32:18 +0000 | [diff] [blame] | 1377 | gnet_stats_copy_rate_est(d, &cl->bstats, &cl->rate_est) < 0 || |
John Fastabend | b0ab6f9 | 2014-09-28 11:54:24 -0700 | [diff] [blame] | 1378 | gnet_stats_copy_queue(d, NULL, &cl->qstats, cl->qdisc->q.qlen) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | return -1; |
| 1380 | |
| 1381 | return gnet_stats_copy_app(d, &xstats, sizeof(xstats)); |
| 1382 | } |
| 1383 | |
| 1384 | |
| 1385 | |
| 1386 | static void |
| 1387 | hfsc_walk(struct Qdisc *sch, struct qdisc_walker *arg) |
| 1388 | { |
| 1389 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1390 | struct hfsc_class *cl; |
| 1391 | unsigned int i; |
| 1392 | |
| 1393 | if (arg->stop) |
| 1394 | return; |
| 1395 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1396 | for (i = 0; i < q->clhash.hashsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1397 | hlist_for_each_entry(cl, &q->clhash.hash[i], |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1398 | cl_common.hnode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | if (arg->count < arg->skip) { |
| 1400 | arg->count++; |
| 1401 | continue; |
| 1402 | } |
| 1403 | if (arg->fn(sch, (unsigned long)cl, arg) < 0) { |
| 1404 | arg->stop = 1; |
| 1405 | return; |
| 1406 | } |
| 1407 | arg->count++; |
| 1408 | } |
| 1409 | } |
| 1410 | } |
| 1411 | |
| 1412 | static void |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1413 | hfsc_schedule_watchdog(struct Qdisc *sch) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | { |
| 1415 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1416 | struct hfsc_class *cl; |
| 1417 | u64 next_time = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1419 | cl = eltree_get_minel(q); |
| 1420 | if (cl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | next_time = cl->cl_e; |
| 1422 | if (q->root.cl_cfmin != 0) { |
| 1423 | if (next_time == 0 || next_time > q->root.cl_cfmin) |
| 1424 | next_time = q->root.cl_cfmin; |
| 1425 | } |
Patrick McHardy | 3d50f23 | 2007-02-13 12:36:57 -0800 | [diff] [blame] | 1426 | WARN_ON(next_time == 0); |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1427 | qdisc_watchdog_schedule(&q->watchdog, next_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | } |
| 1429 | |
| 1430 | static int |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1431 | hfsc_init_qdisc(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | { |
| 1433 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1434 | struct tc_hfsc_qopt *qopt; |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1435 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1437 | if (opt == NULL || nla_len(opt) < sizeof(*qopt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | return -EINVAL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1439 | qopt = nla_data(opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | q->defcls = qopt->defcls; |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1442 | err = qdisc_class_hash_init(&q->clhash); |
| 1443 | if (err < 0) |
| 1444 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | q->eligible = RB_ROOT; |
| 1446 | INIT_LIST_HEAD(&q->droplist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1448 | q->root.cl_common.classid = sch->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | q->root.refcnt = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | q->root.sched = q; |
Changli Gao | 3511c91 | 2010-10-16 13:04:08 +0000 | [diff] [blame] | 1451 | q->root.qdisc = qdisc_create_dflt(sch->dev_queue, &pfifo_qdisc_ops, |
Patrick McHardy | 9f9afec | 2006-11-29 17:35:18 -0800 | [diff] [blame] | 1452 | sch->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | if (q->root.qdisc == NULL) |
| 1454 | q->root.qdisc = &noop_qdisc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | INIT_LIST_HEAD(&q->root.children); |
| 1456 | q->root.vt_tree = RB_ROOT; |
| 1457 | q->root.cf_tree = RB_ROOT; |
| 1458 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1459 | qdisc_class_hash_insert(&q->clhash, &q->root.cl_common); |
| 1460 | qdisc_class_hash_grow(sch, &q->clhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1462 | qdisc_watchdog_init(&q->watchdog, sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | |
| 1464 | return 0; |
| 1465 | } |
| 1466 | |
| 1467 | static int |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1468 | hfsc_change_qdisc(struct Qdisc *sch, struct nlattr *opt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | { |
| 1470 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1471 | struct tc_hfsc_qopt *qopt; |
| 1472 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1473 | if (opt == NULL || nla_len(opt) < sizeof(*qopt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | return -EINVAL; |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1475 | qopt = nla_data(opt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | |
| 1477 | sch_tree_lock(sch); |
| 1478 | q->defcls = qopt->defcls; |
| 1479 | sch_tree_unlock(sch); |
| 1480 | |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
| 1484 | static void |
| 1485 | hfsc_reset_class(struct hfsc_class *cl) |
| 1486 | { |
| 1487 | cl->cl_total = 0; |
| 1488 | cl->cl_cumul = 0; |
| 1489 | cl->cl_d = 0; |
| 1490 | cl->cl_e = 0; |
| 1491 | cl->cl_vt = 0; |
| 1492 | cl->cl_vtadj = 0; |
| 1493 | cl->cl_vtoff = 0; |
| 1494 | cl->cl_cvtmin = 0; |
| 1495 | cl->cl_cvtmax = 0; |
| 1496 | cl->cl_cvtoff = 0; |
| 1497 | cl->cl_pcvtoff = 0; |
| 1498 | cl->cl_vtperiod = 0; |
| 1499 | cl->cl_parentperiod = 0; |
| 1500 | cl->cl_f = 0; |
| 1501 | cl->cl_myf = 0; |
| 1502 | cl->cl_myfadj = 0; |
| 1503 | cl->cl_cfmin = 0; |
| 1504 | cl->cl_nactive = 0; |
| 1505 | |
| 1506 | cl->vt_tree = RB_ROOT; |
| 1507 | cl->cf_tree = RB_ROOT; |
| 1508 | qdisc_reset(cl->qdisc); |
| 1509 | |
| 1510 | if (cl->cl_flags & HFSC_RSC) |
| 1511 | rtsc_init(&cl->cl_deadline, &cl->cl_rsc, 0, 0); |
| 1512 | if (cl->cl_flags & HFSC_FSC) |
| 1513 | rtsc_init(&cl->cl_virtual, &cl->cl_fsc, 0, 0); |
| 1514 | if (cl->cl_flags & HFSC_USC) |
| 1515 | rtsc_init(&cl->cl_ulimit, &cl->cl_usc, 0, 0); |
| 1516 | } |
| 1517 | |
| 1518 | static void |
| 1519 | hfsc_reset_qdisc(struct Qdisc *sch) |
| 1520 | { |
| 1521 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1522 | struct hfsc_class *cl; |
| 1523 | unsigned int i; |
| 1524 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1525 | for (i = 0; i < q->clhash.hashsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1526 | hlist_for_each_entry(cl, &q->clhash.hash[i], cl_common.hnode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | hfsc_reset_class(cl); |
| 1528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | q->eligible = RB_ROOT; |
| 1530 | INIT_LIST_HEAD(&q->droplist); |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1531 | qdisc_watchdog_cancel(&q->watchdog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | sch->q.qlen = 0; |
| 1533 | } |
| 1534 | |
| 1535 | static void |
| 1536 | hfsc_destroy_qdisc(struct Qdisc *sch) |
| 1537 | { |
| 1538 | struct hfsc_sched *q = qdisc_priv(sch); |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1539 | struct hlist_node *next; |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1540 | struct hfsc_class *cl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | unsigned int i; |
| 1542 | |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1543 | for (i = 0; i < q->clhash.hashsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1544 | hlist_for_each_entry(cl, &q->clhash.hash[i], cl_common.hnode) |
Patrick McHardy | a4aebb8 | 2008-07-01 19:53:09 -0700 | [diff] [blame] | 1545 | tcf_destroy_chain(&cl->filter_list); |
| 1546 | } |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1547 | for (i = 0; i < q->clhash.hashsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1548 | hlist_for_each_entry_safe(cl, next, &q->clhash.hash[i], |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1549 | cl_common.hnode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | hfsc_destroy_class(sch, cl); |
| 1551 | } |
Patrick McHardy | be0d39d | 2008-07-05 23:21:47 -0700 | [diff] [blame] | 1552 | qdisc_class_hash_destroy(&q->clhash); |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1553 | qdisc_watchdog_cancel(&q->watchdog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | } |
| 1555 | |
| 1556 | static int |
| 1557 | hfsc_dump_qdisc(struct Qdisc *sch, struct sk_buff *skb) |
| 1558 | { |
| 1559 | struct hfsc_sched *q = qdisc_priv(sch); |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 1560 | unsigned char *b = skb_tail_pointer(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | struct tc_hfsc_qopt qopt; |
Eric Dumazet | f5a59b7 | 2011-12-23 05:19:20 +0000 | [diff] [blame] | 1562 | struct hfsc_class *cl; |
Eric Dumazet | f5a59b7 | 2011-12-23 05:19:20 +0000 | [diff] [blame] | 1563 | unsigned int i; |
| 1564 | |
| 1565 | sch->qstats.backlog = 0; |
| 1566 | for (i = 0; i < q->clhash.hashsize; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 1567 | hlist_for_each_entry(cl, &q->clhash.hash[i], cl_common.hnode) |
Eric Dumazet | f5a59b7 | 2011-12-23 05:19:20 +0000 | [diff] [blame] | 1568 | sch->qstats.backlog += cl->qdisc->qstats.backlog; |
| 1569 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
| 1571 | qopt.defcls = q->defcls; |
David S. Miller | 1b34ec4 | 2012-03-29 05:11:39 -0400 | [diff] [blame] | 1572 | if (nla_put(skb, TCA_OPTIONS, sizeof(qopt), &qopt)) |
| 1573 | goto nla_put_failure; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | return skb->len; |
| 1575 | |
Patrick McHardy | 1e90474 | 2008-01-22 22:11:17 -0800 | [diff] [blame] | 1576 | nla_put_failure: |
Arnaldo Carvalho de Melo | dc5fc57 | 2007-03-25 23:06:12 -0700 | [diff] [blame] | 1577 | nlmsg_trim(skb, b); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | return -1; |
| 1579 | } |
| 1580 | |
| 1581 | static int |
| 1582 | hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch) |
| 1583 | { |
| 1584 | struct hfsc_class *cl; |
Ingo Molnar | dc0a001 | 2008-11-25 16:50:02 -0800 | [diff] [blame] | 1585 | int uninitialized_var(err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | |
| 1587 | cl = hfsc_classify(skb, sch, &err); |
| 1588 | if (cl == NULL) { |
Jarek Poplawski | c27f339 | 2008-08-04 22:39:11 -0700 | [diff] [blame] | 1589 | if (err & __NET_XMIT_BYPASS) |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 1590 | qdisc_qstats_drop(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | kfree_skb(skb); |
| 1592 | return err; |
| 1593 | } |
| 1594 | |
Jussi Kivilinna | 5f86173 | 2008-07-20 00:08:04 -0700 | [diff] [blame] | 1595 | err = qdisc_enqueue(skb, cl->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | if (unlikely(err != NET_XMIT_SUCCESS)) { |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 1597 | if (net_xmit_drop_count(err)) { |
| 1598 | cl->qstats.drops++; |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 1599 | qdisc_qstats_drop(sch); |
Jarek Poplawski | 378a2f0 | 2008-08-04 22:31:03 -0700 | [diff] [blame] | 1600 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | return err; |
| 1602 | } |
| 1603 | |
| 1604 | if (cl->qdisc->q.qlen == 1) |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 1605 | set_active(cl, qdisc_pkt_len(skb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | sch->q.qlen++; |
| 1608 | |
| 1609 | return NET_XMIT_SUCCESS; |
| 1610 | } |
| 1611 | |
| 1612 | static struct sk_buff * |
| 1613 | hfsc_dequeue(struct Qdisc *sch) |
| 1614 | { |
| 1615 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1616 | struct hfsc_class *cl; |
| 1617 | struct sk_buff *skb; |
| 1618 | u64 cur_time; |
| 1619 | unsigned int next_len; |
| 1620 | int realtime = 0; |
| 1621 | |
| 1622 | if (sch->q.qlen == 0) |
| 1623 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | |
Patrick McHardy | 3bebcda | 2007-03-23 11:29:25 -0700 | [diff] [blame] | 1625 | cur_time = psched_get_time(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | |
| 1627 | /* |
| 1628 | * if there are eligible classes, use real-time criteria. |
| 1629 | * find the class with the minimum deadline among |
| 1630 | * the eligible classes. |
| 1631 | */ |
Eric Dumazet | cc7ec45 | 2011-01-19 19:26:56 +0000 | [diff] [blame] | 1632 | cl = eltree_get_mindl(q, cur_time); |
| 1633 | if (cl) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | realtime = 1; |
| 1635 | } else { |
| 1636 | /* |
| 1637 | * use link-sharing criteria |
| 1638 | * get the class with the minimum vt in the hierarchy |
| 1639 | */ |
| 1640 | cl = vttree_get_minvt(&q->root, cur_time); |
| 1641 | if (cl == NULL) { |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 1642 | qdisc_qstats_overlimit(sch); |
Patrick McHardy | ed2b229 | 2007-03-16 01:19:33 -0700 | [diff] [blame] | 1643 | hfsc_schedule_watchdog(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | return NULL; |
| 1645 | } |
| 1646 | } |
| 1647 | |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 1648 | skb = qdisc_dequeue_peeked(cl->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | if (skb == NULL) { |
Jarek Poplawski | b00355d | 2009-02-01 01:12:42 -0800 | [diff] [blame] | 1650 | qdisc_warn_nonwc("HFSC", cl->qdisc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | return NULL; |
| 1652 | } |
| 1653 | |
Eric Dumazet | 2dd875f | 2012-05-10 05:36:34 +0000 | [diff] [blame] | 1654 | bstats_update(&cl->bstats, skb); |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 1655 | update_vf(cl, qdisc_pkt_len(skb), cur_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | if (realtime) |
Jussi Kivilinna | 0abf77e | 2008-07-20 00:08:27 -0700 | [diff] [blame] | 1657 | cl->cl_cumul += qdisc_pkt_len(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
| 1659 | if (cl->qdisc->q.qlen != 0) { |
| 1660 | if (cl->cl_flags & HFSC_RSC) { |
| 1661 | /* update ed */ |
| 1662 | next_len = qdisc_peek_len(cl->qdisc); |
| 1663 | if (realtime) |
| 1664 | update_ed(cl, next_len); |
| 1665 | else |
| 1666 | update_d(cl, next_len); |
| 1667 | } |
| 1668 | } else { |
| 1669 | /* the class becomes passive */ |
| 1670 | set_passive(cl); |
| 1671 | } |
| 1672 | |
Eric Dumazet | fd245a4 | 2011-01-20 05:27:16 +0000 | [diff] [blame] | 1673 | qdisc_unthrottled(sch); |
Eric Dumazet | 9190b3b | 2011-01-20 23:31:33 -0800 | [diff] [blame] | 1674 | qdisc_bstats_update(sch, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | sch->q.qlen--; |
| 1676 | |
| 1677 | return skb; |
| 1678 | } |
| 1679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | static unsigned int |
| 1681 | hfsc_drop(struct Qdisc *sch) |
| 1682 | { |
| 1683 | struct hfsc_sched *q = qdisc_priv(sch); |
| 1684 | struct hfsc_class *cl; |
| 1685 | unsigned int len; |
| 1686 | |
| 1687 | list_for_each_entry(cl, &q->droplist, dlist) { |
| 1688 | if (cl->qdisc->ops->drop != NULL && |
| 1689 | (len = cl->qdisc->ops->drop(cl->qdisc)) > 0) { |
| 1690 | if (cl->qdisc->q.qlen == 0) { |
| 1691 | update_vf(cl, 0, 0); |
| 1692 | set_passive(cl); |
| 1693 | } else { |
| 1694 | list_move_tail(&cl->dlist, &q->droplist); |
| 1695 | } |
| 1696 | cl->qstats.drops++; |
John Fastabend | 25331d6 | 2014-09-28 11:53:29 -0700 | [diff] [blame] | 1697 | qdisc_qstats_drop(sch); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | sch->q.qlen--; |
| 1699 | return len; |
| 1700 | } |
| 1701 | } |
| 1702 | return 0; |
| 1703 | } |
| 1704 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 1705 | static const struct Qdisc_class_ops hfsc_class_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | .change = hfsc_change_class, |
| 1707 | .delete = hfsc_delete_class, |
| 1708 | .graft = hfsc_graft_class, |
| 1709 | .leaf = hfsc_class_leaf, |
Patrick McHardy | f973b91 | 2006-11-29 17:36:43 -0800 | [diff] [blame] | 1710 | .qlen_notify = hfsc_qlen_notify, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | .get = hfsc_get_class, |
| 1712 | .put = hfsc_put_class, |
| 1713 | .bind_tcf = hfsc_bind_tcf, |
| 1714 | .unbind_tcf = hfsc_unbind_tcf, |
| 1715 | .tcf_chain = hfsc_tcf_chain, |
| 1716 | .dump = hfsc_dump_class, |
| 1717 | .dump_stats = hfsc_dump_class_stats, |
| 1718 | .walk = hfsc_walk |
| 1719 | }; |
| 1720 | |
Eric Dumazet | 20fea08 | 2007-11-14 01:44:41 -0800 | [diff] [blame] | 1721 | static struct Qdisc_ops hfsc_qdisc_ops __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | .id = "hfsc", |
| 1723 | .init = hfsc_init_qdisc, |
| 1724 | .change = hfsc_change_qdisc, |
| 1725 | .reset = hfsc_reset_qdisc, |
| 1726 | .destroy = hfsc_destroy_qdisc, |
| 1727 | .dump = hfsc_dump_qdisc, |
| 1728 | .enqueue = hfsc_enqueue, |
| 1729 | .dequeue = hfsc_dequeue, |
Jarek Poplawski | 77be155 | 2008-10-31 00:47:01 -0700 | [diff] [blame] | 1730 | .peek = qdisc_peek_dequeued, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | .drop = hfsc_drop, |
| 1732 | .cl_ops = &hfsc_class_ops, |
| 1733 | .priv_size = sizeof(struct hfsc_sched), |
| 1734 | .owner = THIS_MODULE |
| 1735 | }; |
| 1736 | |
| 1737 | static int __init |
| 1738 | hfsc_init(void) |
| 1739 | { |
| 1740 | return register_qdisc(&hfsc_qdisc_ops); |
| 1741 | } |
| 1742 | |
| 1743 | static void __exit |
| 1744 | hfsc_cleanup(void) |
| 1745 | { |
| 1746 | unregister_qdisc(&hfsc_qdisc_ops); |
| 1747 | } |
| 1748 | |
| 1749 | MODULE_LICENSE("GPL"); |
| 1750 | module_init(hfsc_init); |
| 1751 | module_exit(hfsc_cleanup); |