1 /* 2 * Copyright (c) 2003, 2004 Matthew Dillon. All rights reserved. 3 * Copyright (c) 2003, 2004 Jeffrey M. Hsu. All rights reserved. 4 * Copyright (c) 2003 Jonathan Lemon. All rights reserved. 5 * Copyright (c) 2003, 2004 The DragonFly Project. All rights reserved. 6 * 7 * This code is derived from software contributed to The DragonFly Project 8 * by Jonathan Lemon, Jeffrey M. Hsu, and Matthew Dillon. 9 * 10 * Jonathan Lemon gave Jeffrey Hsu permission to combine his copyright 11 * into this one around July 8 2004. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of The DragonFly Project nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific, prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 28 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 29 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 30 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 31 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 33 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 34 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 35 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/msgport.h> 44 #include <sys/proc.h> 45 #include <sys/interrupt.h> 46 #include <sys/socket.h> 47 #include <sys/sysctl.h> 48 #include <sys/socketvar.h> 49 #include <net/if.h> 50 #include <net/if_var.h> 51 #include <net/netisr2.h> 52 #include <machine/cpufunc.h> 53 #include <machine/smp.h> 54 55 #include <sys/thread2.h> 56 #include <sys/msgport2.h> 57 #include <net/netmsg2.h> 58 #include <sys/mplock2.h> 59 60 static void netmsg_service_loop(void *arg); 61 static void netisr_hashfn0(struct mbuf **mp, int hoff); 62 static void netisr_nohashck(struct mbuf *, const struct pktinfo *); 63 64 struct netmsg_port_registration { 65 TAILQ_ENTRY(netmsg_port_registration) npr_entry; 66 lwkt_port_t npr_port; 67 }; 68 69 struct netmsg_rollup { 70 TAILQ_ENTRY(netmsg_rollup) ru_entry; 71 netisr_ru_t ru_func; 72 int ru_prio; 73 }; 74 75 struct netmsg_barrier { 76 struct netmsg_base base; 77 volatile cpumask_t *br_cpumask; 78 volatile uint32_t br_done; 79 }; 80 81 #define NETISR_BR_NOTDONE 0x1 82 #define NETISR_BR_WAITDONE 0x80000000 83 84 struct netisr_barrier { 85 struct netmsg_barrier *br_msgs[MAXCPU]; 86 int br_isset; 87 }; 88 89 static struct netisr netisrs[NETISR_MAX]; 90 static TAILQ_HEAD(,netmsg_port_registration) netreglist; 91 static TAILQ_HEAD(,netmsg_rollup) netrulist; 92 93 /* Per-CPU thread to handle any protocol. */ 94 struct thread netisr_cpu[MAXCPU]; 95 lwkt_port netisr_afree_rport; 96 lwkt_port netisr_afree_free_so_rport; 97 lwkt_port netisr_adone_rport; 98 lwkt_port netisr_apanic_rport; 99 lwkt_port netisr_sync_port; 100 101 static int (*netmsg_fwd_port_fn)(lwkt_port_t, lwkt_msg_t); 102 103 SYSCTL_NODE(_net, OID_AUTO, netisr, CTLFLAG_RW, 0, "netisr"); 104 105 /* 106 * netisr_afree_rport replymsg function, only used to handle async 107 * messages which the sender has abandoned to their fate. 108 */ 109 static void 110 netisr_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 111 { 112 kfree(msg, M_LWKTMSG); 113 } 114 115 static void 116 netisr_autofree_free_so_reply(lwkt_port_t port, lwkt_msg_t msg) 117 { 118 sofree(((netmsg_t)msg)->base.nm_so); 119 kfree(msg, M_LWKTMSG); 120 } 121 122 /* 123 * We need a custom putport function to handle the case where the 124 * message target is the current thread's message port. This case 125 * can occur when the TCP or UDP stack does a direct callback to NFS and NFS 126 * then turns around and executes a network operation synchronously. 127 * 128 * To prevent deadlocking, we must execute these self-referential messages 129 * synchronously, effectively turning the message into a glorified direct 130 * procedure call back into the protocol stack. The operation must be 131 * complete on return or we will deadlock, so panic if it isn't. 132 * 133 * However, the target function is under no obligation to immediately 134 * reply the message. It may forward it elsewhere. 135 */ 136 static int 137 netmsg_put_port(lwkt_port_t port, lwkt_msg_t lmsg) 138 { 139 netmsg_base_t nmsg = (void *)lmsg; 140 141 if ((lmsg->ms_flags & MSGF_SYNC) && port == &curthread->td_msgport) { 142 nmsg->nm_dispatch((netmsg_t)nmsg); 143 return(EASYNC); 144 } else { 145 return(netmsg_fwd_port_fn(port, lmsg)); 146 } 147 } 148 149 /* 150 * UNIX DOMAIN sockets still have to run their uipc functions synchronously, 151 * because they depend on the user proc context for a number of things 152 * (like creds) which we have not yet incorporated into the message structure. 153 * 154 * However, we maintain or message/port abstraction. Having a special 155 * synchronous port which runs the commands synchronously gives us the 156 * ability to serialize operations in one place later on when we start 157 * removing the BGL. 158 */ 159 static int 160 netmsg_sync_putport(lwkt_port_t port, lwkt_msg_t lmsg) 161 { 162 netmsg_base_t nmsg = (void *)lmsg; 163 164 KKASSERT((lmsg->ms_flags & MSGF_DONE) == 0); 165 166 lmsg->ms_target_port = port; /* required for abort */ 167 nmsg->nm_dispatch((netmsg_t)nmsg); 168 return(EASYNC); 169 } 170 171 static void 172 netisr_init(void) 173 { 174 int i; 175 176 TAILQ_INIT(&netreglist); 177 TAILQ_INIT(&netrulist); 178 179 /* 180 * Create default per-cpu threads for generic protocol handling. 181 */ 182 for (i = 0; i < ncpus; ++i) { 183 lwkt_create(netmsg_service_loop, NULL, NULL, 184 &netisr_cpu[i], 185 TDF_NOSTART|TDF_FORCE_SPINPORT|TDF_FIXEDCPU, 186 i, "netisr_cpu %d", i); 187 netmsg_service_port_init(&netisr_cpu[i].td_msgport); 188 lwkt_schedule(&netisr_cpu[i]); 189 } 190 191 /* 192 * The netisr_afree_rport is a special reply port which automatically 193 * frees the replied message. The netisr_adone_rport simply marks 194 * the message as being done. The netisr_apanic_rport panics if 195 * the message is replied to. 196 */ 197 lwkt_initport_replyonly(&netisr_afree_rport, netisr_autofree_reply); 198 lwkt_initport_replyonly(&netisr_afree_free_so_rport, 199 netisr_autofree_free_so_reply); 200 lwkt_initport_replyonly_null(&netisr_adone_rport); 201 lwkt_initport_panic(&netisr_apanic_rport); 202 203 /* 204 * The netisr_syncport is a special port which executes the message 205 * synchronously and waits for it if EASYNC is returned. 206 */ 207 lwkt_initport_putonly(&netisr_sync_port, netmsg_sync_putport); 208 } 209 210 SYSINIT(netisr, SI_SUB_PRE_DRIVERS, SI_ORDER_FIRST, netisr_init, NULL); 211 212 /* 213 * Finish initializing the message port for a netmsg service. This also 214 * registers the port for synchronous cleanup operations such as when an 215 * ifnet is being destroyed. There is no deregistration API yet. 216 */ 217 void 218 netmsg_service_port_init(lwkt_port_t port) 219 { 220 struct netmsg_port_registration *reg; 221 222 /* 223 * Override the putport function. Our custom function checks for 224 * self-references and executes such commands synchronously. 225 */ 226 if (netmsg_fwd_port_fn == NULL) 227 netmsg_fwd_port_fn = port->mp_putport; 228 KKASSERT(netmsg_fwd_port_fn == port->mp_putport); 229 port->mp_putport = netmsg_put_port; 230 231 /* 232 * Keep track of ports using the netmsg API so we can synchronize 233 * certain operations (such as freeing an ifnet structure) across all 234 * consumers. 235 */ 236 reg = kmalloc(sizeof(*reg), M_TEMP, M_WAITOK|M_ZERO); 237 reg->npr_port = port; 238 TAILQ_INSERT_TAIL(&netreglist, reg, npr_entry); 239 } 240 241 /* 242 * This function synchronizes the caller with all netmsg services. For 243 * example, if an interface is being removed we must make sure that all 244 * packets related to that interface complete processing before the structure 245 * can actually be freed. This sort of synchronization is an alternative to 246 * ref-counting the netif, removing the ref counting overhead in favor of 247 * placing additional overhead in the netif freeing sequence (where it is 248 * inconsequential). 249 */ 250 void 251 netmsg_service_sync(void) 252 { 253 struct netmsg_port_registration *reg; 254 struct netmsg_base smsg; 255 256 netmsg_init(&smsg, NULL, &curthread->td_msgport, 0, netmsg_sync_handler); 257 258 TAILQ_FOREACH(reg, &netreglist, npr_entry) { 259 lwkt_domsg(reg->npr_port, &smsg.lmsg, 0); 260 } 261 } 262 263 /* 264 * The netmsg function simply replies the message. API semantics require 265 * EASYNC to be returned if the netmsg function disposes of the message. 266 */ 267 void 268 netmsg_sync_handler(netmsg_t msg) 269 { 270 lwkt_replymsg(&msg->lmsg, 0); 271 } 272 273 /* 274 * Generic netmsg service loop. Some protocols may roll their own but all 275 * must do the basic command dispatch function call done here. 276 */ 277 static void 278 netmsg_service_loop(void *arg) 279 { 280 struct netmsg_rollup *ru; 281 netmsg_base_t msg; 282 thread_t td = curthread; 283 int limit; 284 285 td->td_type = TD_TYPE_NETISR; 286 287 while ((msg = lwkt_waitport(&td->td_msgport, 0))) { 288 /* 289 * Run up to 512 pending netmsgs. 290 */ 291 limit = 512; 292 do { 293 KASSERT(msg->nm_dispatch != NULL, 294 ("netmsg_service isr %d badmsg", 295 msg->lmsg.u.ms_result)); 296 if (msg->nm_so && 297 msg->nm_so->so_port != &td->td_msgport) { 298 /* 299 * Sockets undergoing connect or disconnect 300 * ops can change ports on us. Chase the 301 * port. 302 */ 303 #ifdef foo 304 /* 305 * This could be quite common for protocols 306 * which support asynchronous pru_connect, 307 * e.g. TCP, so kprintf socket port chasing 308 * could be too verbose for the console. 309 */ 310 kprintf("netmsg_service_loop: Warning, " 311 "port changed so=%p\n", msg->nm_so); 312 #endif 313 lwkt_forwardmsg(msg->nm_so->so_port, 314 &msg->lmsg); 315 } else { 316 /* 317 * We are on the correct port, dispatch it. 318 */ 319 msg->nm_dispatch((netmsg_t)msg); 320 } 321 if (--limit == 0) 322 break; 323 } while ((msg = lwkt_getport(&td->td_msgport)) != NULL); 324 325 /* 326 * Run all registered rollup functions for this cpu 327 * (e.g. tcp_willblock()). 328 */ 329 TAILQ_FOREACH(ru, &netrulist, ru_entry) 330 ru->ru_func(); 331 } 332 } 333 334 /* 335 * Forward a packet to a netisr service function. 336 * 337 * If the packet has not been assigned to a protocol thread we call 338 * the port characterization function to assign it. The caller must 339 * clear M_HASH (or not have set it in the first place) if the caller 340 * wishes the packet to be recharacterized. 341 */ 342 int 343 netisr_queue(int num, struct mbuf *m) 344 { 345 struct netisr *ni; 346 struct netmsg_packet *pmsg; 347 lwkt_port_t port; 348 349 KASSERT((num > 0 && num <= NELEM(netisrs)), 350 ("Bad isr %d", num)); 351 352 ni = &netisrs[num]; 353 if (ni->ni_handler == NULL) { 354 kprintf("Unregistered isr %d\n", num); 355 m_freem(m); 356 return (EIO); 357 } 358 359 /* 360 * Figure out which protocol thread to send to. This does not 361 * have to be perfect but performance will be really good if it 362 * is correct. Major protocol inputs such as ip_input() will 363 * re-characterize the packet as necessary. 364 */ 365 if ((m->m_flags & M_HASH) == 0) { 366 ni->ni_hashfn(&m, 0); 367 if (m == NULL) { 368 m_freem(m); 369 return (EIO); 370 } 371 if ((m->m_flags & M_HASH) == 0) { 372 kprintf("netisr_queue(%d): packet hash failed\n", num); 373 m_freem(m); 374 return (EIO); 375 } 376 } 377 378 /* 379 * Get the protocol port based on the packet hash, initialize 380 * the netmsg, and send it off. 381 */ 382 port = netisr_hashport(m->m_pkthdr.hash); 383 pmsg = &m->m_hdr.mh_netmsg; 384 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport, 385 0, ni->ni_handler); 386 pmsg->nm_packet = m; 387 pmsg->base.lmsg.u.ms_result = num; 388 lwkt_sendmsg(port, &pmsg->base.lmsg); 389 390 return (0); 391 } 392 393 /* 394 * Run a netisr service function on the packet. 395 * 396 * The packet must have been correctly characterized! 397 */ 398 int 399 netisr_handle(int num, struct mbuf *m) 400 { 401 struct netisr *ni; 402 struct netmsg_packet *pmsg; 403 lwkt_port_t port; 404 405 /* 406 * Get the protocol port based on the packet hash 407 */ 408 KASSERT((m->m_flags & M_HASH), ("packet not characterized")); 409 port = netisr_hashport(m->m_pkthdr.hash); 410 KASSERT(&curthread->td_msgport == port, ("wrong msgport")); 411 412 KASSERT((num > 0 && num <= NELEM(netisrs)), ("bad isr %d", num)); 413 ni = &netisrs[num]; 414 if (ni->ni_handler == NULL) { 415 kprintf("unregistered isr %d\n", num); 416 m_freem(m); 417 return EIO; 418 } 419 420 /* 421 * Initialize the netmsg, and run the handler directly. 422 */ 423 pmsg = &m->m_hdr.mh_netmsg; 424 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport, 425 0, ni->ni_handler); 426 pmsg->nm_packet = m; 427 pmsg->base.lmsg.u.ms_result = num; 428 ni->ni_handler((netmsg_t)&pmsg->base); 429 430 return 0; 431 } 432 433 /* 434 * Pre-characterization of a deeper portion of the packet for the 435 * requested isr. 436 * 437 * The base of the ISR type (e.g. IP) that we want to characterize is 438 * at (hoff) relative to the beginning of the mbuf. This allows 439 * e.g. ether_characterize() to not have to adjust the m_data/m_len. 440 */ 441 void 442 netisr_characterize(int num, struct mbuf **mp, int hoff) 443 { 444 struct netisr *ni; 445 struct mbuf *m; 446 447 /* 448 * Validation 449 */ 450 m = *mp; 451 KKASSERT(m != NULL); 452 453 if (num < 0 || num >= NETISR_MAX) { 454 if (num == NETISR_MAX) { 455 m->m_flags |= M_HASH; 456 m->m_pkthdr.hash = 0; 457 return; 458 } 459 panic("Bad isr %d", num); 460 } 461 462 /* 463 * Valid netisr? 464 */ 465 ni = &netisrs[num]; 466 if (ni->ni_handler == NULL) { 467 kprintf("Unregistered isr %d\n", num); 468 m_freem(m); 469 *mp = NULL; 470 } 471 472 /* 473 * Characterize the packet 474 */ 475 if ((m->m_flags & M_HASH) == 0) { 476 ni->ni_hashfn(mp, hoff); 477 m = *mp; 478 if (m && (m->m_flags & M_HASH) == 0) 479 kprintf("netisr_queue(%d): packet hash failed\n", num); 480 } 481 } 482 483 void 484 netisr_register(int num, netisr_fn_t handler, netisr_hashfn_t hashfn) 485 { 486 struct netisr *ni; 487 488 KASSERT((num > 0 && num <= NELEM(netisrs)), 489 ("netisr_register: bad isr %d", num)); 490 KKASSERT(handler != NULL); 491 492 if (hashfn == NULL) 493 hashfn = netisr_hashfn0; 494 495 ni = &netisrs[num]; 496 497 ni->ni_handler = handler; 498 ni->ni_hashck = netisr_nohashck; 499 ni->ni_hashfn = hashfn; 500 netmsg_init(&ni->ni_netmsg, NULL, &netisr_adone_rport, 0, NULL); 501 } 502 503 void 504 netisr_register_hashcheck(int num, netisr_hashck_t hashck) 505 { 506 struct netisr *ni; 507 508 KASSERT((num > 0 && num <= NELEM(netisrs)), 509 ("netisr_register: bad isr %d", num)); 510 511 ni = &netisrs[num]; 512 ni->ni_hashck = hashck; 513 } 514 515 void 516 netisr_register_rollup(netisr_ru_t ru_func, int prio) 517 { 518 struct netmsg_rollup *new_ru, *ru; 519 520 new_ru = kmalloc(sizeof(*new_ru), M_TEMP, M_WAITOK|M_ZERO); 521 new_ru->ru_func = ru_func; 522 new_ru->ru_prio = prio; 523 524 /* 525 * Higher priority "rollup" appears first 526 */ 527 TAILQ_FOREACH(ru, &netrulist, ru_entry) { 528 if (ru->ru_prio < new_ru->ru_prio) { 529 TAILQ_INSERT_BEFORE(ru, new_ru, ru_entry); 530 return; 531 } 532 } 533 TAILQ_INSERT_TAIL(&netrulist, new_ru, ru_entry); 534 } 535 536 /* 537 * Return a default protocol control message processing thread port 538 */ 539 lwkt_port_t 540 cpu0_ctlport(int cmd __unused, struct sockaddr *sa __unused, 541 void *extra __unused) 542 { 543 return (&netisr_cpu[0].td_msgport); 544 } 545 546 /* 547 * This is a default netisr packet characterization function which 548 * sets M_HASH. If a netisr is registered with a NULL hashfn function 549 * this one is assigned. 550 * 551 * This function makes no attempt to validate the packet. 552 */ 553 static void 554 netisr_hashfn0(struct mbuf **mp, int hoff __unused) 555 { 556 struct mbuf *m = *mp; 557 558 m->m_flags |= M_HASH; 559 m->m_pkthdr.hash = 0; 560 } 561 562 /* 563 * schednetisr() is used to call the netisr handler from the appropriate 564 * netisr thread for polling and other purposes. 565 * 566 * This function may be called from a hard interrupt or IPI and must be 567 * MP SAFE and non-blocking. We use a fixed per-cpu message instead of 568 * trying to allocate one. We must get ourselves onto the target cpu 569 * to safely check the MSGF_DONE bit on the message but since the message 570 * will be sent to that cpu anyway this does not add any extra work beyond 571 * what lwkt_sendmsg() would have already had to do to schedule the target 572 * thread. 573 */ 574 static void 575 schednetisr_remote(void *data) 576 { 577 int num = (int)(intptr_t)data; 578 struct netisr *ni = &netisrs[num]; 579 lwkt_port_t port = &netisr_cpu[0].td_msgport; 580 netmsg_base_t pmsg; 581 582 pmsg = &netisrs[num].ni_netmsg; 583 if (pmsg->lmsg.ms_flags & MSGF_DONE) { 584 netmsg_init(pmsg, NULL, &netisr_adone_rport, 0, ni->ni_handler); 585 pmsg->lmsg.u.ms_result = num; 586 lwkt_sendmsg(port, &pmsg->lmsg); 587 } 588 } 589 590 void 591 schednetisr(int num) 592 { 593 KASSERT((num > 0 && num <= NELEM(netisrs)), 594 ("schednetisr: bad isr %d", num)); 595 KKASSERT(netisrs[num].ni_handler != NULL); 596 if (mycpu->gd_cpuid != 0) { 597 lwkt_send_ipiq(globaldata_find(0), 598 schednetisr_remote, (void *)(intptr_t)num); 599 } else { 600 crit_enter(); 601 schednetisr_remote((void *)(intptr_t)num); 602 crit_exit(); 603 } 604 } 605 606 static void 607 netisr_barrier_dispatch(netmsg_t nmsg) 608 { 609 struct netmsg_barrier *msg = (struct netmsg_barrier *)nmsg; 610 611 atomic_clear_cpumask(msg->br_cpumask, mycpu->gd_cpumask); 612 if (*msg->br_cpumask == 0) 613 wakeup(msg->br_cpumask); 614 615 for (;;) { 616 uint32_t done = msg->br_done; 617 618 cpu_ccfence(); 619 if ((done & NETISR_BR_NOTDONE) == 0) 620 break; 621 622 tsleep_interlock(&msg->br_done, 0); 623 if (atomic_cmpset_int(&msg->br_done, 624 done, done | NETISR_BR_WAITDONE)) 625 tsleep(&msg->br_done, PINTERLOCKED, "nbrdsp", 0); 626 } 627 628 lwkt_replymsg(&nmsg->lmsg, 0); 629 } 630 631 struct netisr_barrier * 632 netisr_barrier_create(void) 633 { 634 struct netisr_barrier *br; 635 636 br = kmalloc(sizeof(*br), M_LWKTMSG, M_WAITOK | M_ZERO); 637 return br; 638 } 639 640 void 641 netisr_barrier_set(struct netisr_barrier *br) 642 { 643 volatile cpumask_t other_cpumask; 644 int i, cur_cpuid; 645 646 KKASSERT(&curthread->td_msgport == netisr_cpuport(0)); 647 KKASSERT(!br->br_isset); 648 649 other_cpumask = mycpu->gd_other_cpus & smp_active_mask; 650 cur_cpuid = mycpuid; 651 652 for (i = 0; i < ncpus; ++i) { 653 struct netmsg_barrier *msg; 654 655 if (i == cur_cpuid) 656 continue; 657 658 msg = kmalloc(sizeof(struct netmsg_barrier), 659 M_LWKTMSG, M_WAITOK); 660 netmsg_init(&msg->base, NULL, &netisr_afree_rport, 661 MSGF_PRIORITY, netisr_barrier_dispatch); 662 msg->br_cpumask = &other_cpumask; 663 msg->br_done = NETISR_BR_NOTDONE; 664 665 KKASSERT(br->br_msgs[i] == NULL); 666 br->br_msgs[i] = msg; 667 } 668 669 for (i = 0; i < ncpus; ++i) { 670 if (i == cur_cpuid) 671 continue; 672 lwkt_sendmsg(netisr_cpuport(i), &br->br_msgs[i]->base.lmsg); 673 } 674 675 while (other_cpumask != 0) { 676 tsleep_interlock(&other_cpumask, 0); 677 if (other_cpumask != 0) 678 tsleep(&other_cpumask, PINTERLOCKED, "nbrset", 0); 679 } 680 br->br_isset = 1; 681 } 682 683 void 684 netisr_barrier_rem(struct netisr_barrier *br) 685 { 686 int i, cur_cpuid; 687 688 KKASSERT(&curthread->td_msgport == netisr_cpuport(0)); 689 KKASSERT(br->br_isset); 690 691 cur_cpuid = mycpuid; 692 for (i = 0; i < ncpus; ++i) { 693 struct netmsg_barrier *msg = br->br_msgs[i]; 694 uint32_t done; 695 696 msg = br->br_msgs[i]; 697 br->br_msgs[i] = NULL; 698 699 if (i == cur_cpuid) 700 continue; 701 702 done = atomic_swap_int(&msg->br_done, 0); 703 if (done & NETISR_BR_WAITDONE) 704 wakeup(&msg->br_done); 705 } 706 br->br_isset = 0; 707 } 708 709 static void 710 netisr_nohashck(struct mbuf *m, const struct pktinfo *pi __unused) 711 { 712 m->m_flags &= ~M_HASH; 713 } 714 715 void 716 netisr_hashcheck(int num, struct mbuf *m, const struct pktinfo *pi) 717 { 718 struct netisr *ni; 719 720 if (num < 0 || num >= NETISR_MAX) 721 panic("Bad isr %d", num); 722 723 /* 724 * Valid netisr? 725 */ 726 ni = &netisrs[num]; 727 if (ni->ni_handler == NULL) 728 panic("Unregistered isr %d", num); 729 730 ni->ni_hashck(m, pi); 731 } 732