Thomas Graf | 44d3624 | 2007-09-15 01:28:01 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * lib/route/sch/htb.c HTB Qdisc |
| 3 | * |
| 4 | * This library is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation version 2.1 |
| 7 | * of the License. |
| 8 | * |
| 9 | * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch> |
| 10 | * Copyright (c) 2005-2006 Petr Gotthard <petr.gotthard@siemens.com> |
| 11 | * Copyright (c) 2005-2006 Siemens AG Oesterreich |
| 12 | */ |
| 13 | |
| 14 | /** |
| 15 | * @ingroup qdisc_api |
| 16 | * @ingroup class_api |
| 17 | * @defgroup htb Hierachical Token Bucket (HTB) |
| 18 | * @{ |
| 19 | */ |
| 20 | |
| 21 | #include <netlink-local.h> |
| 22 | #include <netlink-tc.h> |
| 23 | #include <netlink/netlink.h> |
| 24 | #include <netlink/cache.h> |
| 25 | #include <netlink/utils.h> |
| 26 | #include <netlink/route/tc.h> |
| 27 | #include <netlink/route/qdisc.h> |
| 28 | #include <netlink/route/qdisc-modules.h> |
| 29 | #include <netlink/route/class.h> |
| 30 | #include <netlink/route/class-modules.h> |
| 31 | #include <netlink/route/link.h> |
| 32 | #include <netlink/route/sch/htb.h> |
| 33 | |
| 34 | /** @cond SKIP */ |
| 35 | #define SCH_HTB_HAS_RATE2QUANTUM 0x01 |
| 36 | #define SCH_HTB_HAS_DEFCLS 0x02 |
| 37 | |
| 38 | #define SCH_HTB_HAS_PRIO 0x001 |
| 39 | #define SCH_HTB_HAS_MTU 0x002 |
| 40 | #define SCH_HTB_HAS_RATE 0x004 |
| 41 | #define SCH_HTB_HAS_CEIL 0x008 |
| 42 | #define SCH_HTB_HAS_RBUFFER 0x010 |
| 43 | #define SCH_HTB_HAS_CBUFFER 0x020 |
| 44 | #define SCH_HTB_HAS_QUANTUM 0x040 |
| 45 | #define SCH_HTB_HAS_OVERHEAD 0x080 |
| 46 | #define SCH_HTB_HAS_MPU 0x100 |
| 47 | /** @endcond */ |
| 48 | |
| 49 | static inline struct rtnl_htb_qdisc *htb_qdisc(struct rtnl_qdisc *qdisc) |
| 50 | { |
| 51 | if (qdisc->q_subdata == NULL) |
| 52 | qdisc->q_subdata = calloc(1, sizeof(struct rtnl_htb_qdisc)); |
| 53 | |
| 54 | return (struct rtnl_htb_qdisc *) qdisc->q_subdata; |
| 55 | } |
| 56 | |
| 57 | static struct nla_policy htb_policy[TCA_HTB_MAX+1] = { |
| 58 | [TCA_HTB_INIT] = { .minlen = sizeof(struct tc_htb_glob) }, |
| 59 | [TCA_HTB_PARMS] = { .minlen = sizeof(struct tc_htb_opt) }, |
| 60 | }; |
| 61 | |
| 62 | static int htb_qdisc_msg_parser(struct rtnl_qdisc *qdisc) |
| 63 | { |
| 64 | int err; |
| 65 | struct nlattr *tb[TCA_HTB_MAX + 1]; |
| 66 | struct rtnl_htb_qdisc *d; |
| 67 | |
| 68 | err = tca_parse(tb, TCA_HTB_MAX, (struct rtnl_tca *) qdisc, htb_policy); |
| 69 | if (err < 0) |
| 70 | return err; |
| 71 | |
| 72 | d = htb_qdisc(qdisc); |
| 73 | |
| 74 | if (tb[TCA_HTB_INIT]) { |
| 75 | struct tc_htb_glob opts; |
| 76 | |
| 77 | nla_memcpy(&opts, tb[TCA_HTB_INIT], sizeof(opts)); |
| 78 | d->qh_rate2quantum = opts.rate2quantum; |
| 79 | d->qh_defcls = opts.defcls; |
| 80 | |
| 81 | d->qh_mask = (SCH_HTB_HAS_RATE2QUANTUM | SCH_HTB_HAS_DEFCLS); |
| 82 | } |
| 83 | |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static void htb_qdisc_free_data(struct rtnl_qdisc *qdisc) |
| 88 | { |
| 89 | free(qdisc->q_subdata); |
| 90 | } |
| 91 | |
| 92 | static inline struct rtnl_htb_class *htb_class(struct rtnl_class *class) |
| 93 | { |
| 94 | if (class->c_subdata == NULL) |
| 95 | class->c_subdata = calloc(1, sizeof(struct rtnl_htb_class)); |
| 96 | |
| 97 | return (struct rtnl_htb_class *) class->c_subdata; |
| 98 | } |
| 99 | |
| 100 | static int htb_class_msg_parser(struct rtnl_class *class) |
| 101 | { |
| 102 | int err; |
| 103 | struct nlattr *tb[TCA_HTB_MAX + 1]; |
| 104 | struct rtnl_htb_class *d; |
| 105 | |
| 106 | err = tca_parse(tb, TCA_HTB_MAX, (struct rtnl_tca *) class, htb_policy); |
| 107 | if (err < 0) |
| 108 | return err; |
| 109 | |
| 110 | d = htb_class(class); |
| 111 | |
| 112 | if (tb[TCA_HTB_PARMS]) { |
| 113 | struct tc_htb_opt opts; |
| 114 | |
| 115 | nla_memcpy(&opts, tb[TCA_HTB_PARMS], sizeof(opts)); |
| 116 | d->ch_prio = opts.prio; |
| 117 | rtnl_copy_ratespec(&d->ch_rate, &opts.rate); |
| 118 | rtnl_copy_ratespec(&d->ch_ceil, &opts.ceil); |
| 119 | d->ch_rbuffer = rtnl_tc_calc_bufsize(opts.buffer, opts.rate.rate); |
| 120 | d->ch_cbuffer = rtnl_tc_calc_bufsize(opts.cbuffer, opts.ceil.rate); |
| 121 | d->ch_quantum = opts.quantum; |
| 122 | d->ch_overhead = (opts.rate.mpu >> 8) & 0xff; |
| 123 | d->ch_mpu = opts.rate.mpu & 0xff; |
| 124 | |
| 125 | d->ch_mask = (SCH_HTB_HAS_PRIO | SCH_HTB_HAS_RATE | |
| 126 | SCH_HTB_HAS_CEIL | SCH_HTB_HAS_RBUFFER | |
| 127 | SCH_HTB_HAS_CBUFFER | SCH_HTB_HAS_QUANTUM | |
| 128 | SCH_HTB_HAS_OVERHEAD | SCH_HTB_HAS_MPU); |
| 129 | } |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | static void htb_class_free_data(struct rtnl_class *class) |
| 135 | { |
| 136 | free(class->c_subdata); |
| 137 | } |
| 138 | |
| 139 | static int htb_qdisc_dump_brief(struct rtnl_qdisc *qdisc, |
| 140 | struct nl_dump_params *p, int line) |
| 141 | { |
| 142 | struct rtnl_htb_qdisc *d = (struct rtnl_htb_qdisc *) qdisc->q_subdata; |
| 143 | |
| 144 | if (d == NULL) |
| 145 | goto ignore; |
| 146 | |
| 147 | if (d->qh_mask & SCH_HTB_HAS_RATE2QUANTUM) |
| 148 | dp_dump(p, " r2q %u", d->qh_rate2quantum); |
| 149 | |
| 150 | if (d->qh_mask & SCH_HTB_HAS_DEFCLS) { |
| 151 | char buf[32]; |
| 152 | dp_dump(p, " default %s", |
| 153 | rtnl_tc_handle2str(d->qh_defcls, buf, sizeof(buf))); |
| 154 | } |
| 155 | |
| 156 | ignore: |
| 157 | return line; |
| 158 | } |
| 159 | |
| 160 | static int htb_class_dump_brief(struct rtnl_class *class, |
| 161 | struct nl_dump_params *p, int line) |
| 162 | { |
| 163 | struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata; |
| 164 | |
| 165 | if (d == NULL) |
| 166 | goto ignore; |
| 167 | |
| 168 | if (d->ch_mask & SCH_HTB_HAS_RATE) { |
| 169 | double r, rbit; |
| 170 | char *ru, *rubit; |
| 171 | |
| 172 | r = nl_cancel_down_bytes(d->ch_rate.rs_rate, &ru); |
| 173 | rbit = nl_cancel_down_bits(d->ch_rate.rs_rate*8, &rubit); |
| 174 | |
| 175 | dp_dump(p, " rate %.2f%s/s (%.0f%s) log %u", |
| 176 | r, ru, rbit, rubit, 1<<d->ch_rate.rs_cell_log); |
| 177 | } |
| 178 | |
| 179 | ignore: |
| 180 | return line; |
| 181 | } |
| 182 | |
| 183 | static int htb_class_dump_full(struct rtnl_class *class, |
| 184 | struct nl_dump_params *p, int line) |
| 185 | { |
| 186 | struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata; |
| 187 | |
| 188 | if (d == NULL) |
| 189 | goto ignore; |
| 190 | |
| 191 | /* line 1 */ |
| 192 | if (d->ch_mask & SCH_HTB_HAS_CEIL) { |
| 193 | double r, rbit; |
| 194 | char *ru, *rubit; |
| 195 | |
| 196 | r = nl_cancel_down_bytes(d->ch_ceil.rs_rate, &ru); |
| 197 | rbit = nl_cancel_down_bits(d->ch_ceil.rs_rate*8, &rubit); |
| 198 | |
| 199 | dp_dump(p, " ceil %.2f%s/s (%.0f%s) log %u", |
| 200 | r, ru, rbit, rubit, 1<<d->ch_ceil.rs_cell_log); |
| 201 | } |
| 202 | |
| 203 | if (d->ch_mask & SCH_HTB_HAS_PRIO) |
| 204 | dp_dump(p, " prio %u", d->ch_prio); |
| 205 | |
| 206 | if (d->ch_mask & SCH_HTB_HAS_MTU) |
| 207 | dp_dump(p, " mtu %u", d->ch_mtu); |
| 208 | |
| 209 | if (d->ch_mask & SCH_HTB_HAS_RBUFFER) { |
| 210 | double b; |
| 211 | char *bu; |
| 212 | |
| 213 | b = nl_cancel_down_bytes(d->ch_rbuffer, &bu); |
| 214 | dp_dump(p, " rbuffer %.2f%s", b, bu); |
| 215 | } |
| 216 | |
| 217 | if (d->ch_mask & SCH_HTB_HAS_CBUFFER) { |
| 218 | double b; |
| 219 | char *bu; |
| 220 | |
| 221 | b = nl_cancel_down_bytes(d->ch_cbuffer, &bu); |
| 222 | dp_dump(p, " cbuffer %.2f%s", b, bu); |
| 223 | } |
| 224 | |
| 225 | if (d->ch_mask & SCH_HTB_HAS_QUANTUM) |
| 226 | dp_dump(p, " quantum %u", d->ch_quantum); |
| 227 | |
| 228 | if (d->ch_mask & SCH_HTB_HAS_OVERHEAD) |
| 229 | dp_dump(p, " overhead %u", d->ch_overhead); |
| 230 | |
| 231 | if (d->ch_mask & SCH_HTB_HAS_MPU) |
| 232 | dp_dump(p, " mpu %u", d->ch_mpu); |
| 233 | |
| 234 | ignore: |
| 235 | return line; |
| 236 | } |
| 237 | |
| 238 | static struct nl_msg *htb_qdisc_get_opts(struct rtnl_qdisc *qdisc) |
| 239 | { |
| 240 | struct rtnl_htb_qdisc *d = (struct rtnl_htb_qdisc *) qdisc->q_subdata; |
| 241 | struct tc_htb_glob opts; |
| 242 | struct nl_msg *msg; |
| 243 | |
| 244 | if (d == NULL) |
| 245 | return NULL; |
| 246 | |
| 247 | msg = nlmsg_alloc(); |
| 248 | if (msg == NULL) |
| 249 | return NULL; |
| 250 | |
| 251 | memset(&opts, 0, sizeof(opts)); |
| 252 | opts.version = TC_HTB_PROTOVER; |
| 253 | |
| 254 | if (d->qh_mask & SCH_HTB_HAS_RATE2QUANTUM) |
| 255 | opts.rate2quantum = d->qh_rate2quantum; |
| 256 | if (d->qh_mask & SCH_HTB_HAS_DEFCLS) |
| 257 | opts.defcls = d->qh_defcls; |
| 258 | |
| 259 | nla_put(msg, TCA_HTB_INIT, sizeof(opts), &opts); |
| 260 | |
| 261 | return msg; |
| 262 | } |
| 263 | |
| 264 | static uint8_t compute_cell(uint32_t rate, uint32_t mtu) |
| 265 | { |
| 266 | uint8_t cell_log = 0; |
| 267 | while (mtu > 255) { |
| 268 | mtu >>= 1; |
| 269 | cell_log++; |
| 270 | } |
| 271 | |
| 272 | return cell_log; |
| 273 | } |
| 274 | |
| 275 | static struct nl_msg *htb_class_get_opts(struct rtnl_class *class) |
| 276 | { |
| 277 | struct rtnl_htb_class *d = (struct rtnl_htb_class *) class->c_subdata; |
| 278 | uint32_t mtu, rtable[RTNL_TC_RTABLE_SIZE], ctable[RTNL_TC_RTABLE_SIZE]; |
| 279 | struct tc_htb_opt opts; |
| 280 | struct nl_msg *msg; |
| 281 | int buffer, cbuffer; |
| 282 | uint8_t overhead = 0, mpu = 0; |
| 283 | |
| 284 | if (d == NULL) |
| 285 | return NULL; |
| 286 | |
| 287 | msg = nlmsg_alloc(); |
| 288 | memset(&opts, 0, sizeof(opts)); |
| 289 | |
| 290 | /* if not set, zero (0) is used as priority */ |
| 291 | if (d->ch_mask & SCH_HTB_HAS_PRIO) |
| 292 | opts.prio = d->ch_prio; |
| 293 | |
| 294 | if (d->ch_mask & SCH_HTB_HAS_MTU) |
| 295 | mtu = d->ch_mtu; |
| 296 | else |
| 297 | mtu = 1600; /* eth packet len */ |
| 298 | |
| 299 | if (!(d->ch_mask & SCH_HTB_HAS_RATE)) |
| 300 | BUG(); |
| 301 | |
| 302 | rtnl_rcopy_ratespec(&opts.rate, &d->ch_rate); |
| 303 | /* if cell_log not set, compute default value */ |
| 304 | if (opts.rate.cell_log == UINT8_MAX) |
| 305 | opts.rate.cell_log = compute_cell(opts.rate.rate, mtu); |
| 306 | |
| 307 | /* if not set, configured rate is used as ceil, which implies no borrowing */ |
| 308 | if (d->ch_mask & SCH_HTB_HAS_CEIL) |
| 309 | rtnl_rcopy_ratespec(&opts.ceil, &d->ch_ceil); |
| 310 | else |
| 311 | memcpy(&opts.ceil, &opts.rate, sizeof(struct tc_ratespec)); |
| 312 | /* if cell_log not set, compute default value */ |
| 313 | if (opts.ceil.cell_log == UINT8_MAX) |
| 314 | opts.ceil.cell_log = compute_cell(opts.ceil.rate, mtu); |
| 315 | |
| 316 | if (d->ch_mask & SCH_HTB_HAS_RBUFFER) |
| 317 | buffer = d->ch_rbuffer; |
| 318 | else |
| 319 | buffer = opts.rate.rate / nl_get_hz() + mtu; |
| 320 | |
| 321 | opts.buffer = rtnl_tc_calc_txtime(buffer, opts.rate.rate); |
| 322 | |
| 323 | if (d->ch_mask & SCH_HTB_HAS_CBUFFER) |
| 324 | cbuffer = d->ch_cbuffer; |
| 325 | else |
| 326 | cbuffer = opts.ceil.rate / nl_get_hz() + mtu; |
| 327 | |
| 328 | opts.cbuffer = rtnl_tc_calc_txtime(cbuffer, opts.ceil.rate); |
| 329 | |
| 330 | if (d->ch_mask & SCH_HTB_HAS_QUANTUM) |
| 331 | opts.quantum = d->ch_quantum; |
| 332 | |
| 333 | if (d->ch_mask & SCH_HTB_HAS_OVERHEAD) |
| 334 | overhead = d->ch_overhead; |
| 335 | |
| 336 | if (d->ch_mask & SCH_HTB_HAS_MPU) |
| 337 | mpu = d->ch_mpu; |
| 338 | |
| 339 | opts.rate.mpu = mpu | (overhead << 8); |
| 340 | opts.ceil.mpu = mpu | (overhead << 8); |
| 341 | |
| 342 | nla_put(msg, TCA_HTB_PARMS, sizeof(opts), &opts); |
| 343 | |
| 344 | rtnl_tc_build_rate_table(rtable, mpu, overhead, |
| 345 | 1 << opts.rate.cell_log, |
| 346 | opts.rate.rate); |
| 347 | nla_put(msg, TCA_HTB_RTAB, sizeof(rtable), &rtable); |
| 348 | |
| 349 | rtnl_tc_build_rate_table(ctable, mpu, overhead, |
| 350 | 1 << opts.ceil.cell_log, |
| 351 | opts.ceil.rate); |
| 352 | nla_put(msg, TCA_HTB_CTAB, sizeof(ctable), &ctable); |
| 353 | |
| 354 | return msg; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * @name Attribute Modifications |
| 359 | * @{ |
| 360 | */ |
| 361 | |
| 362 | void rtnl_htb_set_rate2quantum(struct rtnl_qdisc *qdisc, uint32_t rate2quantum) |
| 363 | { |
| 364 | struct rtnl_htb_qdisc *d = htb_qdisc(qdisc); |
| 365 | if (d == NULL) |
| 366 | return; |
| 367 | |
| 368 | d->qh_rate2quantum = rate2quantum; |
| 369 | d->qh_mask |= SCH_HTB_HAS_RATE2QUANTUM; |
| 370 | } |
| 371 | |
| 372 | /** |
| 373 | * Set default class of the htb qdisc to the specified value |
| 374 | * @arg qdisc qdisc to change |
| 375 | * @arg defcls new default class |
| 376 | */ |
| 377 | void rtnl_htb_set_defcls(struct rtnl_qdisc *qdisc, uint32_t defcls) |
| 378 | { |
| 379 | struct rtnl_htb_qdisc *d = htb_qdisc(qdisc); |
| 380 | if (d == NULL) |
| 381 | return; |
| 382 | |
| 383 | d->qh_defcls = defcls; |
| 384 | d->qh_mask |= SCH_HTB_HAS_DEFCLS; |
| 385 | } |
| 386 | |
| 387 | void rtnl_htb_set_prio(struct rtnl_class *class, uint32_t prio) |
| 388 | { |
| 389 | struct rtnl_htb_class *d = htb_class(class); |
| 390 | if (d == NULL) |
| 391 | return; |
| 392 | |
| 393 | d->ch_prio = prio; |
| 394 | d->ch_mask |= SCH_HTB_HAS_PRIO; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Set MTU of the data link. |
| 399 | * @arg class HTB class to be modified. |
| 400 | * @arg mtu New MTU in bytes. |
| 401 | * |
| 402 | * Sets MTU of the data link controlled by the HTB class. |
| 403 | * If not set, the Ethernet MTU (1600) is used. |
| 404 | */ |
| 405 | void rtnl_htb_set_mtu(struct rtnl_class *class, uint32_t mtu) |
| 406 | { |
| 407 | struct rtnl_htb_class *d = htb_class(class); |
| 408 | if (d == NULL) |
| 409 | return; |
| 410 | |
| 411 | d->ch_mtu = mtu; |
| 412 | d->ch_mask |= SCH_HTB_HAS_MTU; |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * Set rate of HTB class. |
| 417 | * @arg class HTB class to be modified. |
| 418 | * @arg rate New rate in bytes per second. |
| 419 | */ |
| 420 | void rtnl_htb_set_rate(struct rtnl_class *class, uint32_t rate) |
| 421 | { |
| 422 | struct rtnl_htb_class *d = htb_class(class); |
| 423 | if (d == NULL) |
| 424 | return; |
| 425 | |
| 426 | d->ch_rate.rs_cell_log = UINT8_MAX; /* use default value */ |
| 427 | d->ch_rate.rs_rate = rate; |
| 428 | d->ch_mask |= SCH_HTB_HAS_RATE; |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * Set ceil of HTB class. |
| 433 | * @arg class HTB class to be modified. |
| 434 | * @arg ceil New ceil in bytes per second. |
| 435 | */ |
| 436 | void rtnl_htb_set_ceil(struct rtnl_class *class, uint32_t ceil) |
| 437 | { |
| 438 | struct rtnl_htb_class *d = htb_class(class); |
| 439 | if (d == NULL) |
| 440 | return; |
| 441 | |
| 442 | d->ch_ceil.rs_cell_log = UINT8_MAX; /* use default value */ |
| 443 | d->ch_ceil.rs_rate = ceil; |
| 444 | d->ch_mask |= SCH_HTB_HAS_CEIL; |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * Set size of the rate bucket of HTB class. |
| 449 | * @arg class HTB class to be modified. |
| 450 | * @arg rbuffer New size in bytes. |
| 451 | */ |
| 452 | void rtnl_htb_set_rbuffer(struct rtnl_class *class, uint32_t rbuffer) |
| 453 | { |
| 454 | struct rtnl_htb_class *d = htb_class(class); |
| 455 | if (d == NULL) |
| 456 | return; |
| 457 | |
| 458 | d->ch_rbuffer = rbuffer; |
| 459 | d->ch_mask |= SCH_HTB_HAS_RBUFFER; |
| 460 | } |
| 461 | |
| 462 | /** |
| 463 | * Set size of the ceil bucket of HTB class. |
| 464 | * @arg class HTB class to be modified. |
| 465 | * @arg cbuffer New size in bytes. |
| 466 | */ |
| 467 | void rtnl_htb_set_cbuffer(struct rtnl_class *class, uint32_t cbuffer) |
| 468 | { |
| 469 | struct rtnl_htb_class *d = htb_class(class); |
| 470 | if (d == NULL) |
| 471 | return; |
| 472 | |
| 473 | d->ch_cbuffer = cbuffer; |
| 474 | d->ch_mask |= SCH_HTB_HAS_CBUFFER; |
| 475 | } |
| 476 | |
| 477 | /** |
| 478 | * Set how much bytes to serve from leaf at once of HTB class {use r2q}. |
| 479 | * @arg class HTB class to be modified. |
| 480 | * @arg quantum New size in bytes. |
| 481 | */ |
| 482 | void rtnl_htb_set_quantum(struct rtnl_class *class, uint32_t quantum) |
| 483 | { |
| 484 | struct rtnl_htb_class *d = htb_class(class); |
| 485 | if (d == NULL) |
| 486 | return; |
| 487 | |
| 488 | d->ch_quantum = quantum; |
| 489 | d->ch_mask |= SCH_HTB_HAS_QUANTUM; |
| 490 | } |
| 491 | |
| 492 | /** |
| 493 | * Set per-packet size overhead used in rate computations of HTB class. |
| 494 | * @arg class HTB class to be modified. |
| 495 | * @arg overhead Size in bytes. |
| 496 | */ |
| 497 | void rtnl_htb_set_overhead(struct rtnl_class *class, uint8_t overhead) |
| 498 | { |
| 499 | struct rtnl_htb_class *d = htb_class(class); |
| 500 | if (d == NULL) |
| 501 | return; |
| 502 | |
| 503 | d->ch_overhead = overhead; |
| 504 | d->ch_mask |= SCH_HTB_HAS_OVERHEAD; |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * Set the minimum packet size used in rate computations of HTB class. |
| 509 | * @arg class HTB class to be modified. |
| 510 | * @arg mpu Size in bytes. |
| 511 | */ |
| 512 | void rtnl_htb_set_mpu(struct rtnl_class *class, uint8_t mpu) |
| 513 | { |
| 514 | struct rtnl_htb_class *d = htb_class(class); |
| 515 | if (d == NULL) |
| 516 | return; |
| 517 | |
| 518 | d->ch_mpu = mpu; |
| 519 | d->ch_mask |= SCH_HTB_HAS_MPU; |
| 520 | } |
| 521 | |
| 522 | /** @} */ |
| 523 | |
| 524 | static struct rtnl_qdisc_ops htb_qdisc_ops = { |
| 525 | .qo_kind = "htb", |
| 526 | .qo_msg_parser = htb_qdisc_msg_parser, |
| 527 | .qo_free_data = htb_qdisc_free_data, |
| 528 | .qo_dump[NL_DUMP_BRIEF] = htb_qdisc_dump_brief, |
| 529 | .qo_get_opts = htb_qdisc_get_opts, |
| 530 | }; |
| 531 | |
| 532 | static struct rtnl_class_ops htb_class_ops = { |
| 533 | .co_kind = "htb", |
| 534 | .co_msg_parser = htb_class_msg_parser, |
| 535 | .co_free_data = htb_class_free_data, |
| 536 | .co_dump[NL_DUMP_BRIEF] = htb_class_dump_brief, |
| 537 | .co_dump[NL_DUMP_FULL] = htb_class_dump_full, |
| 538 | .co_get_opts = htb_class_get_opts, |
| 539 | }; |
| 540 | |
| 541 | static void __init htb_init(void) |
| 542 | { |
| 543 | rtnl_qdisc_register(&htb_qdisc_ops); |
| 544 | rtnl_class_register(&htb_class_ops); |
| 545 | } |
| 546 | |
| 547 | static void __exit htb_exit(void) |
| 548 | { |
| 549 | rtnl_qdisc_unregister(&htb_qdisc_ops); |
| 550 | rtnl_class_unregister(&htb_class_ops); |
| 551 | } |
| 552 | |
| 553 | /** @} */ |