Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netpfil/ipfw/ip_dn_glue.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 Riccardo Panicucci, Universita` di Pisa 5 * All rights reserved 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* 30 * $FreeBSD$ 31 * 32 * Binary compatibility support for /sbin/ipfw RELENG_7 and RELENG_8 33 */ 34 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/module.h> 44 #include <sys/priv.h> 45 #include <sys/proc.h> 46 #include <sys/rwlock.h> 47 #include <sys/socket.h> 48 #include <sys/socketvar.h> 49 #include <sys/time.h> 50 #include <sys/taskqueue.h> 51 #include <net/if.h> /* IFNAMSIZ, struct ifaddr, ifq head, lock.h mutex.h */ 52 #include <netinet/in.h> 53 #include <netinet/ip_var.h> /* ip_output(), IP_FORWARDING */ 54 #include <netinet/ip_fw.h> 55 #include <netinet/ip_dummynet.h> 56 57 #include <netpfil/ipfw/ip_fw_private.h> 58 #include <netpfil/ipfw/dn_heap.h> 59 #include <netpfil/ipfw/ip_dn_private.h> 60 #ifdef NEW_AQM 61 #include <netpfil/ipfw/dn_aqm.h> 62 #endif 63 #include <netpfil/ipfw/dn_sched.h> 64 65 /* FREEBSD7.2 ip_dummynet.h r191715*/ 66 67 struct dn_heap_entry7 { 68 int64_t key; /* sorting key. Topmost element is smallest one */ 69 void *object; /* object pointer */ 70 }; 71 72 struct dn_heap7 { 73 int size; 74 int elements; 75 int offset; /* XXX if > 0 this is the offset of direct ptr to obj */ 76 struct dn_heap_entry7 *p; /* really an array of "size" entries */ 77 }; 78 79 /* Common to 7.2 and 8 */ 80 struct dn_flow_set { 81 SLIST_ENTRY(dn_flow_set) next; /* linked list in a hash slot */ 82 83 u_short fs_nr ; /* flow_set number */ 84 u_short flags_fs; 85 #define DNOLD_HAVE_FLOW_MASK 0x0001 86 #define DNOLD_IS_RED 0x0002 87 #define DNOLD_IS_GENTLE_RED 0x0004 88 #define DNOLD_QSIZE_IS_BYTES 0x0008 /* queue size is measured in bytes */ 89 #define DNOLD_NOERROR 0x0010 /* do not report ENOBUFS on drops */ 90 #define DNOLD_HAS_PROFILE 0x0020 /* the pipe has a delay profile. */ 91 #define DNOLD_IS_PIPE 0x4000 92 #define DNOLD_IS_QUEUE 0x8000 93 94 struct dn_pipe7 *pipe ; /* pointer to parent pipe */ 95 u_short parent_nr ; /* parent pipe#, 0 if local to a pipe */ 96 97 int weight ; /* WFQ queue weight */ 98 int qsize ; /* queue size in slots or bytes */ 99 int plr ; /* pkt loss rate (2^31-1 means 100%) */ 100 101 struct ipfw_flow_id flow_mask ; 102 103 /* hash table of queues onto this flow_set */ 104 int rq_size ; /* number of slots */ 105 int rq_elements ; /* active elements */ 106 struct dn_flow_queue7 **rq; /* array of rq_size entries */ 107 108 u_int32_t last_expired ; /* do not expire too frequently */ 109 int backlogged ; /* #active queues for this flowset */ 110 111 /* RED parameters */ 112 #define SCALE_RED 16 113 #define SCALE(x) ( (x) << SCALE_RED ) 114 #define SCALE_VAL(x) ( (x) >> SCALE_RED ) 115 #define SCALE_MUL(x,y) ( ( (x) * (y) ) >> SCALE_RED ) 116 int w_q ; /* queue weight (scaled) */ 117 int max_th ; /* maximum threshold for queue (scaled) */ 118 int min_th ; /* minimum threshold for queue (scaled) */ 119 int max_p ; /* maximum value for p_b (scaled) */ 120 u_int c_1 ; /* max_p/(max_th-min_th) (scaled) */ 121 u_int c_2 ; /* max_p*min_th/(max_th-min_th) (scaled) */ 122 u_int c_3 ; /* for GRED, (1-max_p)/max_th (scaled) */ 123 u_int c_4 ; /* for GRED, 1 - 2*max_p (scaled) */ 124 u_int * w_q_lookup ; /* lookup table for computing (1-w_q)^t */ 125 u_int lookup_depth ; /* depth of lookup table */ 126 int lookup_step ; /* granularity inside the lookup table */ 127 int lookup_weight ; /* equal to (1-w_q)^t / (1-w_q)^(t+1) */ 128 int avg_pkt_size ; /* medium packet size */ 129 int max_pkt_size ; /* max packet size */ 130 }; 131 SLIST_HEAD(dn_flow_set_head, dn_flow_set); 132 133 #define DN_IS_PIPE 0x4000 134 #define DN_IS_QUEUE 0x8000 135 struct dn_flow_queue7 { 136 struct dn_flow_queue7 *next ; 137 struct ipfw_flow_id id ; 138 139 struct mbuf *head, *tail ; /* queue of packets */ 140 u_int len ; 141 u_int len_bytes ; 142 143 u_long numbytes; 144 145 u_int64_t tot_pkts ; /* statistics counters */ 146 u_int64_t tot_bytes ; 147 u_int32_t drops ; 148 149 int hash_slot ; /* debugging/diagnostic */ 150 151 /* RED parameters */ 152 int avg ; /* average queue length est. (scaled) */ 153 int count ; /* arrivals since last RED drop */ 154 int random ; /* random value (scaled) */ 155 u_int32_t q_time; /* start of queue idle time */ 156 157 /* WF2Q+ support */ 158 struct dn_flow_set *fs ; /* parent flow set */ 159 int heap_pos ; /* position (index) of struct in heap */ 160 int64_t sched_time ; /* current time when queue enters ready_heap */ 161 162 int64_t S,F ; /* start time, finish time */ 163 }; 164 165 struct dn_pipe7 { /* a pipe */ 166 SLIST_ENTRY(dn_pipe7) next; /* linked list in a hash slot */ 167 168 int pipe_nr ; /* number */ 169 uint32_t bandwidth; /* really, bytes/tick. */ 170 int delay ; /* really, ticks */ 171 172 struct mbuf *head, *tail ; /* packets in delay line */ 173 174 /* WF2Q+ */ 175 struct dn_heap7 scheduler_heap ; /* top extract - key Finish time*/ 176 struct dn_heap7 not_eligible_heap; /* top extract- key Start time */ 177 struct dn_heap7 idle_heap ; /* random extract - key Start=Finish time */ 178 179 int64_t V ; /* virtual time */ 180 int sum; /* sum of weights of all active sessions */ 181 182 int numbytes; 183 184 int64_t sched_time ; /* time pipe was scheduled in ready_heap */ 185 186 /* 187 * When the tx clock come from an interface (if_name[0] != '\0'), its name 188 * is stored below, whereas the ifp is filled when the rule is configured. 189 */ 190 char if_name[IFNAMSIZ]; 191 struct ifnet *ifp ; 192 int ready ; /* set if ifp != NULL and we got a signal from it */ 193 194 struct dn_flow_set fs ; /* used with fixed-rate flows */ 195 }; 196 SLIST_HEAD(dn_pipe_head7, dn_pipe7); 197 198 /* FREEBSD8 ip_dummynet.h r196045 */ 199 struct dn_flow_queue8 { 200 struct dn_flow_queue8 *next ; 201 struct ipfw_flow_id id ; 202 203 struct mbuf *head, *tail ; /* queue of packets */ 204 u_int len ; 205 u_int len_bytes ; 206 207 uint64_t numbytes ; /* credit for transmission (dynamic queues) */ 208 int64_t extra_bits; /* extra bits simulating unavailable channel */ 209 210 u_int64_t tot_pkts ; /* statistics counters */ 211 u_int64_t tot_bytes ; 212 u_int32_t drops ; 213 214 int hash_slot ; /* debugging/diagnostic */ 215 216 /* RED parameters */ 217 int avg ; /* average queue length est. (scaled) */ 218 int count ; /* arrivals since last RED drop */ 219 int random ; /* random value (scaled) */ 220 int64_t idle_time; /* start of queue idle time */ 221 222 /* WF2Q+ support */ 223 struct dn_flow_set *fs ; /* parent flow set */ 224 int heap_pos ; /* position (index) of struct in heap */ 225 int64_t sched_time ; /* current time when queue enters ready_heap */ 226 227 int64_t S,F ; /* start time, finish time */ 228 }; 229 230 struct dn_pipe8 { /* a pipe */ 231 SLIST_ENTRY(dn_pipe8) next; /* linked list in a hash slot */ 232 233 int pipe_nr ; /* number */ 234 uint32_t bandwidth; /* really, bytes/tick. */ 235 int delay ; /* really, ticks */ 236 237 struct mbuf *head, *tail ; /* packets in delay line */ 238 239 /* WF2Q+ */ 240 struct dn_heap7 scheduler_heap ; /* top extract - key Finish time*/ 241 struct dn_heap7 not_eligible_heap; /* top extract- key Start time */ 242 struct dn_heap7 idle_heap ; /* random extract - key Start=Finish time */ 243 244 int64_t V ; /* virtual time */ 245 int sum; /* sum of weights of all active sessions */ 246 247 /* Same as in dn_flow_queue, numbytes can become large */ 248 int64_t numbytes; /* bits I can transmit (more or less). */ 249 uint64_t burst; /* burst size, scaled: bits * hz */ 250 251 int64_t sched_time ; /* time pipe was scheduled in ready_heap */ 252 int64_t idle_time; /* start of pipe idle time */ 253 254 char if_name[IFNAMSIZ]; 255 struct ifnet *ifp ; 256 int ready ; /* set if ifp != NULL and we got a signal from it */ 257 258 struct dn_flow_set fs ; /* used with fixed-rate flows */ 259 260 /* fields to simulate a delay profile */ 261 #define ED_MAX_NAME_LEN 32 262 char name[ED_MAX_NAME_LEN]; 263 int loss_level; 264 int samples_no; 265 int *samples; 266 }; 267 268 #define ED_MAX_SAMPLES_NO 1024 269 struct dn_pipe_max8 { 270 struct dn_pipe8 pipe; 271 int samples[ED_MAX_SAMPLES_NO]; 272 }; 273 SLIST_HEAD(dn_pipe_head8, dn_pipe8); 274 275 /* 276 * Changes from 7.2 to 8: 277 * dn_pipe: 278 * numbytes from int to int64_t 279 * add burst (int64_t) 280 * add idle_time (int64_t) 281 * add profile 282 * add struct dn_pipe_max 283 * add flag DN_HAS_PROFILE 284 * 285 * dn_flow_queue 286 * numbytes from u_long to int64_t 287 * add extra_bits (int64_t) 288 * q_time from u_int32_t to int64_t and name idle_time 289 * 290 * dn_flow_set unchanged 291 * 292 */ 293 294 /* NOTE:XXX copied from dummynet.c */ 295 #define O_NEXT(p, len) ((void *)((char *)p + len)) 296 static void 297 oid_fill(struct dn_id *oid, int len, int type, uintptr_t id) 298 { 299 oid->len = len; 300 oid->type = type; 301 oid->subtype = 0; 302 oid->id = id; 303 } 304 /* make room in the buffer and move the pointer forward */ 305 static void * 306 o_next(struct dn_id **o, int len, int type) 307 { 308 struct dn_id *ret = *o; 309 oid_fill(ret, len, type, 0); 310 *o = O_NEXT(*o, len); 311 return ret; 312 } 313 314 static size_t pipesize7 = sizeof(struct dn_pipe7); 315 static size_t pipesize8 = sizeof(struct dn_pipe8); 316 static size_t pipesizemax8 = sizeof(struct dn_pipe_max8); 317 318 /* Indicate 'ipfw' version 319 * 1: from FreeBSD 7.2 320 * 0: from FreeBSD 8 321 * -1: unknown (for now is unused) 322 * 323 * It is update when a IP_DUMMYNET_DEL or IP_DUMMYNET_CONFIGURE request arrives 324 * NOTE: if a IP_DUMMYNET_GET arrives and the 'ipfw' version is unknown, 325 * it is suppose to be the FreeBSD 8 version. 326 */ 327 static int is7 = 0; 328 329 static int 330 convertflags2new(int src) 331 { 332 int dst = 0; 333 334 if (src & DNOLD_HAVE_FLOW_MASK) 335 dst |= DN_HAVE_MASK; 336 if (src & DNOLD_QSIZE_IS_BYTES) 337 dst |= DN_QSIZE_BYTES; 338 if (src & DNOLD_NOERROR) 339 dst |= DN_NOERROR; 340 if (src & DNOLD_IS_RED) 341 dst |= DN_IS_RED; 342 if (src & DNOLD_IS_GENTLE_RED) 343 dst |= DN_IS_GENTLE_RED; 344 if (src & DNOLD_HAS_PROFILE) 345 dst |= DN_HAS_PROFILE; 346 347 return dst; 348 } 349 350 static int 351 convertflags2old(int src) 352 { 353 int dst = 0; 354 355 if (src & DN_HAVE_MASK) 356 dst |= DNOLD_HAVE_FLOW_MASK; 357 if (src & DN_IS_RED) 358 dst |= DNOLD_IS_RED; 359 if (src & DN_IS_GENTLE_RED) 360 dst |= DNOLD_IS_GENTLE_RED; 361 if (src & DN_NOERROR) 362 dst |= DNOLD_NOERROR; 363 if (src & DN_HAS_PROFILE) 364 dst |= DNOLD_HAS_PROFILE; 365 if (src & DN_QSIZE_BYTES) 366 dst |= DNOLD_QSIZE_IS_BYTES; 367 368 return dst; 369 } 370 371 static int 372 dn_compat_del(void *v) 373 { 374 struct dn_pipe7 *p = (struct dn_pipe7 *) v; 375 struct dn_pipe8 *p8 = (struct dn_pipe8 *) v; 376 struct { 377 struct dn_id oid; 378 uintptr_t a[1]; /* add more if we want a list */ 379 } cmd; 380 381 /* XXX DN_API_VERSION ??? */ 382 oid_fill((void *)&cmd, sizeof(cmd), DN_CMD_DELETE, DN_API_VERSION); 383 384 if (is7) { 385 if (p->pipe_nr == 0 && p->fs.fs_nr == 0) 386 return EINVAL; 387 if (p->pipe_nr != 0 && p->fs.fs_nr != 0) 388 return EINVAL; 389 } else { 390 if (p8->pipe_nr == 0 && p8->fs.fs_nr == 0) 391 return EINVAL; 392 if (p8->pipe_nr != 0 && p8->fs.fs_nr != 0) 393 return EINVAL; 394 } 395 396 if (p->pipe_nr != 0) { /* pipe x delete */ 397 cmd.a[0] = p->pipe_nr; 398 cmd.oid.subtype = DN_LINK; 399 } else { /* queue x delete */ 400 cmd.oid.subtype = DN_FS; 401 cmd.a[0] = (is7) ? p->fs.fs_nr : p8->fs.fs_nr; 402 } 403 404 return do_config(&cmd, cmd.oid.len); 405 } 406 407 static int 408 dn_compat_config_queue(struct dn_fs *fs, void* v) 409 { 410 struct dn_pipe7 *p7 = (struct dn_pipe7 *)v; 411 struct dn_pipe8 *p8 = (struct dn_pipe8 *)v; 412 struct dn_flow_set *f; 413 414 if (is7) 415 f = &p7->fs; 416 else 417 f = &p8->fs; 418 419 fs->fs_nr = f->fs_nr; 420 fs->sched_nr = f->parent_nr; 421 fs->flow_mask = f->flow_mask; 422 fs->buckets = f->rq_size; 423 fs->qsize = f->qsize; 424 fs->plr = f->plr; 425 fs->par[0] = f->weight; 426 fs->flags = convertflags2new(f->flags_fs); 427 if (fs->flags & DN_IS_GENTLE_RED || fs->flags & DN_IS_RED) { 428 fs->w_q = f->w_q; 429 fs->max_th = f->max_th; 430 fs->min_th = f->min_th; 431 fs->max_p = f->max_p; 432 } 433 434 return 0; 435 } 436 437 static int 438 dn_compat_config_pipe(struct dn_sch *sch, struct dn_link *p, 439 struct dn_fs *fs, void* v) 440 { 441 struct dn_pipe7 *p7 = (struct dn_pipe7 *)v; 442 struct dn_pipe8 *p8 = (struct dn_pipe8 *)v; 443 int i = p7->pipe_nr; 444 445 sch->sched_nr = i; 446 sch->oid.subtype = 0; 447 p->link_nr = i; 448 fs->fs_nr = i + 2*DN_MAX_ID; 449 fs->sched_nr = i + DN_MAX_ID; 450 451 /* Common to 7 and 8 */ 452 p->bandwidth = p7->bandwidth; 453 p->delay = p7->delay; 454 if (!is7) { 455 /* FreeBSD 8 has burst */ 456 p->burst = p8->burst; 457 } 458 459 /* fill the fifo flowset */ 460 dn_compat_config_queue(fs, v); 461 fs->fs_nr = i + 2*DN_MAX_ID; 462 fs->sched_nr = i + DN_MAX_ID; 463 464 /* Move scheduler related parameter from fs to sch */ 465 sch->buckets = fs->buckets; /*XXX*/ 466 fs->buckets = 0; 467 if (fs->flags & DN_HAVE_MASK) { 468 sch->flags |= DN_HAVE_MASK; 469 fs->flags &= ~DN_HAVE_MASK; 470 sch->sched_mask = fs->flow_mask; 471 bzero(&fs->flow_mask, sizeof(struct ipfw_flow_id)); 472 } 473 474 return 0; 475 } 476 477 static int 478 dn_compat_config_profile(struct dn_profile *pf, struct dn_link *p, 479 void *v) 480 { 481 struct dn_pipe8 *p8 = (struct dn_pipe8 *)v; 482 483 p8->samples = &(((struct dn_pipe_max8 *)p8)->samples[0]); 484 485 pf->link_nr = p->link_nr; 486 pf->loss_level = p8->loss_level; 487 // pf->bandwidth = p->bandwidth; //XXX bandwidth redundant? 488 pf->samples_no = p8->samples_no; 489 strncpy(pf->name, p8->name,sizeof(pf->name)); 490 bcopy(p8->samples, pf->samples, sizeof(pf->samples)); 491 492 return 0; 493 } 494 495 /* 496 * If p->pipe_nr != 0 the command is 'pipe x config', so need to create 497 * the three main struct, else only a flowset is created 498 */ 499 static int 500 dn_compat_configure(void *v) 501 { 502 struct dn_id *buf = NULL, *base; 503 struct dn_sch *sch = NULL; 504 struct dn_link *p = NULL; 505 struct dn_fs *fs = NULL; 506 struct dn_profile *pf = NULL; 507 int lmax; 508 int error; 509 510 struct dn_pipe7 *p7 = (struct dn_pipe7 *)v; 511 struct dn_pipe8 *p8 = (struct dn_pipe8 *)v; 512 513 int i; /* number of object to configure */ 514 515 lmax = sizeof(struct dn_id); /* command header */ 516 lmax += sizeof(struct dn_sch) + sizeof(struct dn_link) + 517 sizeof(struct dn_fs) + sizeof(struct dn_profile); 518 519 base = buf = malloc(lmax, M_DUMMYNET, M_WAITOK|M_ZERO); 520 o_next(&buf, sizeof(struct dn_id), DN_CMD_CONFIG); 521 base->id = DN_API_VERSION; 522 523 /* pipe_nr is the same in p7 and p8 */ 524 i = p7->pipe_nr; 525 if (i != 0) { /* pipe config */ 526 sch = o_next(&buf, sizeof(*sch), DN_SCH); 527 p = o_next(&buf, sizeof(*p), DN_LINK); 528 fs = o_next(&buf, sizeof(*fs), DN_FS); 529 530 error = dn_compat_config_pipe(sch, p, fs, v); 531 if (error) { 532 free(buf, M_DUMMYNET); 533 return error; 534 } 535 if (!is7 && p8->samples_no > 0) { 536 /* Add profiles*/ 537 pf = o_next(&buf, sizeof(*pf), DN_PROFILE); 538 error = dn_compat_config_profile(pf, p, v); 539 if (error) { 540 free(buf, M_DUMMYNET); 541 return error; 542 } 543 } 544 } else { /* queue config */ 545 fs = o_next(&buf, sizeof(*fs), DN_FS); 546 error = dn_compat_config_queue(fs, v); 547 if (error) { 548 free(buf, M_DUMMYNET); 549 return error; 550 } 551 } 552 error = do_config(base, (char *)buf - (char *)base); 553 554 if (buf) 555 free(buf, M_DUMMYNET); 556 return error; 557 } 558 559 int 560 dn_compat_calc_size(void) 561 { 562 int need = 0; 563 /* XXX use FreeBSD 8 struct size */ 564 /* NOTE: 565 * - half scheduler: schk_count/2 566 * - all flowset: fsk_count 567 * - all flowset queues: queue_count 568 * - all pipe queue: si_count 569 */ 570 need += V_dn_cfg.schk_count * sizeof(struct dn_pipe8) / 2; 571 need += V_dn_cfg.fsk_count * sizeof(struct dn_flow_set); 572 need += V_dn_cfg.si_count * sizeof(struct dn_flow_queue8); 573 need += V_dn_cfg.queue_count * sizeof(struct dn_flow_queue8); 574 575 return need; 576 } 577 578 int 579 dn_c_copy_q (void *_ni, void *arg) 580 { 581 struct copy_args *a = arg; 582 struct dn_flow_queue7 *fq7 = (struct dn_flow_queue7 *)*a->start; 583 struct dn_flow_queue8 *fq8 = (struct dn_flow_queue8 *)*a->start; 584 struct dn_flow *ni = (struct dn_flow *)_ni; 585 int size = 0; 586 587 /* XXX hash slot not set */ 588 /* No difference between 7.2/8 */ 589 fq7->len = ni->length; 590 fq7->len_bytes = ni->len_bytes; 591 fq7->id = ni->fid; 592 593 if (is7) { 594 size = sizeof(struct dn_flow_queue7); 595 fq7->tot_pkts = ni->tot_pkts; 596 fq7->tot_bytes = ni->tot_bytes; 597 fq7->drops = ni->drops; 598 } else { 599 size = sizeof(struct dn_flow_queue8); 600 fq8->tot_pkts = ni->tot_pkts; 601 fq8->tot_bytes = ni->tot_bytes; 602 fq8->drops = ni->drops; 603 } 604 605 *a->start += size; 606 return 0; 607 } 608 609 int 610 dn_c_copy_pipe(struct dn_schk *s, struct copy_args *a, int nq) 611 { 612 struct dn_link *l = &s->link; 613 struct dn_fsk *f = s->fs; 614 615 struct dn_pipe7 *pipe7 = (struct dn_pipe7 *)*a->start; 616 struct dn_pipe8 *pipe8 = (struct dn_pipe8 *)*a->start; 617 struct dn_flow_set *fs; 618 int size = 0; 619 620 if (is7) { 621 fs = &pipe7->fs; 622 size = sizeof(struct dn_pipe7); 623 } else { 624 fs = &pipe8->fs; 625 size = sizeof(struct dn_pipe8); 626 } 627 628 /* These 4 field are the same in pipe7 and pipe8 */ 629 pipe7->next.sle_next = (struct dn_pipe7 *)DN_IS_PIPE; 630 pipe7->bandwidth = l->bandwidth; 631 pipe7->delay = l->delay * 1000 / hz; 632 pipe7->pipe_nr = l->link_nr - DN_MAX_ID; 633 634 if (!is7) { 635 if (s->profile) { 636 struct dn_profile *pf = s->profile; 637 strncpy(pipe8->name, pf->name, sizeof(pf->name)); 638 pipe8->loss_level = pf->loss_level; 639 pipe8->samples_no = pf->samples_no; 640 } 641 pipe8->burst = div64(l->burst , 8 * hz); 642 } 643 644 fs->flow_mask = s->sch.sched_mask; 645 fs->rq_size = s->sch.buckets ? s->sch.buckets : 1; 646 647 fs->parent_nr = l->link_nr - DN_MAX_ID; 648 fs->qsize = f->fs.qsize; 649 fs->plr = f->fs.plr; 650 fs->w_q = f->fs.w_q; 651 fs->max_th = f->max_th; 652 fs->min_th = f->min_th; 653 fs->max_p = f->fs.max_p; 654 fs->rq_elements = nq; 655 656 fs->flags_fs = convertflags2old(f->fs.flags); 657 658 *a->start += size; 659 return 0; 660 } 661 662 int 663 dn_compat_copy_pipe(struct copy_args *a, void *_o) 664 { 665 int have = a->end - *a->start; 666 int need = 0; 667 int pipe_size = sizeof(struct dn_pipe8); 668 int queue_size = sizeof(struct dn_flow_queue8); 669 int n_queue = 0; /* number of queues */ 670 671 struct dn_schk *s = (struct dn_schk *)_o; 672 /* calculate needed space: 673 * - struct dn_pipe 674 * - if there are instances, dn_queue * n_instances 675 */ 676 n_queue = (s->sch.flags & DN_HAVE_MASK ? dn_ht_entries(s->siht) : 677 (s->siht ? 1 : 0)); 678 need = pipe_size + queue_size * n_queue; 679 if (have < need) { 680 D("have %d < need %d", have, need); 681 return 1; 682 } 683 /* copy pipe */ 684 dn_c_copy_pipe(s, a, n_queue); 685 686 /* copy queues */ 687 if (s->sch.flags & DN_HAVE_MASK) 688 dn_ht_scan(s->siht, dn_c_copy_q, a); 689 else if (s->siht) 690 dn_c_copy_q(s->siht, a); 691 return 0; 692 } 693 694 int 695 dn_c_copy_fs(struct dn_fsk *f, struct copy_args *a, int nq) 696 { 697 struct dn_flow_set *fs = (struct dn_flow_set *)*a->start; 698 699 fs->next.sle_next = (struct dn_flow_set *)DN_IS_QUEUE; 700 fs->fs_nr = f->fs.fs_nr; 701 fs->qsize = f->fs.qsize; 702 fs->plr = f->fs.plr; 703 fs->w_q = f->fs.w_q; 704 fs->max_th = f->max_th; 705 fs->min_th = f->min_th; 706 fs->max_p = f->fs.max_p; 707 fs->flow_mask = f->fs.flow_mask; 708 fs->rq_elements = nq; 709 fs->rq_size = (f->fs.buckets ? f->fs.buckets : 1); 710 fs->parent_nr = f->fs.sched_nr; 711 fs->weight = f->fs.par[0]; 712 713 fs->flags_fs = convertflags2old(f->fs.flags); 714 *a->start += sizeof(struct dn_flow_set); 715 return 0; 716 } 717 718 int 719 dn_compat_copy_queue(struct copy_args *a, void *_o) 720 { 721 int have = a->end - *a->start; 722 int need = 0; 723 int fs_size = sizeof(struct dn_flow_set); 724 int queue_size = sizeof(struct dn_flow_queue8); 725 726 struct dn_fsk *fs = (struct dn_fsk *)_o; 727 int n_queue = 0; /* number of queues */ 728 729 n_queue = (fs->fs.flags & DN_HAVE_MASK ? dn_ht_entries(fs->qht) : 730 (fs->qht ? 1 : 0)); 731 732 need = fs_size + queue_size * n_queue; 733 if (have < need) { 734 D("have < need"); 735 return 1; 736 } 737 738 /* copy flowset */ 739 dn_c_copy_fs(fs, a, n_queue); 740 741 /* copy queues */ 742 if (fs->fs.flags & DN_HAVE_MASK) 743 dn_ht_scan(fs->qht, dn_c_copy_q, a); 744 else if (fs->qht) 745 dn_c_copy_q(fs->qht, a); 746 747 return 0; 748 } 749 750 int 751 copy_data_helper_compat(void *_o, void *_arg) 752 { 753 struct copy_args *a = _arg; 754 755 if (a->type == DN_COMPAT_PIPE) { 756 struct dn_schk *s = _o; 757 if (s->sch.oid.subtype != 1 || s->sch.sched_nr <= DN_MAX_ID) { 758 return 0; /* not old type */ 759 } 760 /* copy pipe parameters, and if instance exists, copy 761 * other parameters and eventually queues. 762 */ 763 if(dn_compat_copy_pipe(a, _o)) 764 return DNHT_SCAN_END; 765 } else if (a->type == DN_COMPAT_QUEUE) { 766 struct dn_fsk *fs = _o; 767 if (fs->fs.fs_nr >= DN_MAX_ID) 768 return 0; 769 if (dn_compat_copy_queue(a, _o)) 770 return DNHT_SCAN_END; 771 } 772 return 0; 773 } 774 775 /* Main function to manage old requests */ 776 int 777 ip_dummynet_compat(struct sockopt *sopt) 778 { 779 int error=0; 780 void *v = NULL; 781 struct dn_id oid; 782 783 /* Length of data, used to found ipfw version... */ 784 int len = sopt->sopt_valsize; 785 786 /* len can be 0 if command was dummynet_flush */ 787 if (len == pipesize7) { 788 D("setting compatibility with FreeBSD 7.2"); 789 is7 = 1; 790 } 791 else if (len == pipesize8 || len == pipesizemax8) { 792 D("setting compatibility with FreeBSD 8"); 793 is7 = 0; 794 } 795 796 switch (sopt->sopt_name) { 797 default: 798 printf("dummynet: -- unknown option %d", sopt->sopt_name); 799 error = EINVAL; 800 break; 801 802 case IP_DUMMYNET_FLUSH: 803 oid_fill(&oid, sizeof(oid), DN_CMD_FLUSH, DN_API_VERSION); 804 do_config(&oid, oid.len); 805 break; 806 807 case IP_DUMMYNET_DEL: 808 v = malloc(len, M_TEMP, M_WAITOK); 809 error = sooptcopyin(sopt, v, len, len); 810 if (error) 811 break; 812 error = dn_compat_del(v); 813 free(v, M_TEMP); 814 break; 815 816 case IP_DUMMYNET_CONFIGURE: 817 v = malloc(len, M_TEMP, M_NOWAIT); 818 if (v == NULL) { 819 error = ENOMEM; 820 break; 821 } 822 error = sooptcopyin(sopt, v, len, len); 823 if (error) 824 break; 825 error = dn_compat_configure(v); 826 free(v, M_TEMP); 827 break; 828 829 case IP_DUMMYNET_GET: { 830 void *buf; 831 int ret; 832 int original_size = sopt->sopt_valsize; 833 int size; 834 835 ret = dummynet_get(sopt, &buf); 836 if (ret) 837 return 0;//XXX ? 838 size = sopt->sopt_valsize; 839 sopt->sopt_valsize = original_size; 840 D("size=%d, buf=%p", size, buf); 841 ret = sooptcopyout(sopt, buf, size); 842 if (ret) 843 printf(" %s ERROR sooptcopyout\n", __FUNCTION__); 844 if (buf) 845 free(buf, M_DUMMYNET); 846 } 847 } 848 849 return error; 850 }
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