1 /* $OpenBSD: init_main.c,v 1.187 2013/03/25 14:58:28 markus Exp $ */ 2 /* $NetBSD: init_main.c,v 1.84.4.1 1996/06/02 09:08:06 mrg Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 39 */ 40 41 #include <sys/param.h> 42 #include <sys/core.h> 43 #include <sys/filedesc.h> 44 #include <sys/file.h> 45 #include <sys/errno.h> 46 #include <sys/exec.h> 47 #include <sys/kernel.h> 48 #include <sys/kthread.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/resourcevar.h> 52 #include <sys/signalvar.h> 53 #include <sys/systm.h> 54 #include <sys/namei.h> 55 #include <sys/vnode.h> 56 #include <sys/tty.h> 57 #include <sys/conf.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/socketvar.h> 61 #include <sys/lockf.h> 62 #include <sys/protosw.h> 63 #include <sys/reboot.h> 64 #include <sys/user.h> 65 #ifdef SYSVSHM 66 #include <sys/shm.h> 67 #endif 68 #ifdef SYSVSEM 69 #include <sys/sem.h> 70 #endif 71 #ifdef SYSVMSG 72 #include <sys/msg.h> 73 #endif 74 #include <sys/domain.h> 75 #include <sys/mbuf.h> 76 #include <sys/pipe.h> 77 #include <sys/workq.h> 78 79 #include <sys/syscall.h> 80 #include <sys/syscallargs.h> 81 82 #include <dev/rndvar.h> 83 84 #include <ufs/ufs/quota.h> 85 86 #include <machine/cpu.h> 87 88 #include <uvm/uvm.h> 89 90 #include <net/if.h> 91 #include <net/raw_cb.h> 92 #include <net/netisr.h> 93 94 #if defined(CRYPTO) 95 #include <crypto/cryptodev.h> 96 #include <crypto/cryptosoft.h> 97 #endif 98 99 #if defined(NFSSERVER) || defined(NFSCLIENT) 100 extern void nfs_init(void); 101 #endif 102 103 #include "mpath.h" 104 #include "vscsi.h" 105 #include "softraid.h" 106 107 const char copyright[] = 108 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 109 "\tThe Regents of the University of California. All rights reserved.\n" 110 "Copyright (c) 1995-2013 OpenBSD. All rights reserved. http://www.OpenBSD.org\n"; 111 112 /* Components of the first process -- never freed. */ 113 struct session session0; 114 struct pgrp pgrp0; 115 struct proc proc0; 116 struct process process0; 117 struct pcred cred0; 118 struct plimit limit0; 119 struct vmspace vmspace0; 120 struct sigacts sigacts0; 121 struct proc *initproc; 122 struct proc *reaperproc; 123 124 int cmask = CMASK; 125 extern struct user *proc0paddr; 126 127 struct vnode *rootvp, *swapdev_vp; 128 int boothowto; 129 struct timeval boottime; 130 int ncpus = 1; 131 int ncpusfound = 1; /* number of cpus we find */ 132 __volatile int start_init_exec; /* semaphore for start_init() */ 133 134 #if !defined(NO_PROPOLICE) 135 #ifdef __ELF__ 136 long __guard_local __dso_hidden; 137 #endif 138 long __guard[8]; 139 #endif 140 141 /* XXX return int so gcc -Werror won't complain */ 142 int main(void *); 143 void check_console(struct proc *); 144 void start_init(void *); 145 void start_cleaner(void *); 146 void start_update(void *); 147 void start_reaper(void *); 148 void crypto_init(void); 149 void init_exec(void); 150 void kqueue_init(void); 151 void workq_init(void); 152 153 extern char sigcode[], esigcode[]; 154 #ifdef SYSCALL_DEBUG 155 extern char *syscallnames[]; 156 #endif 157 158 struct emul emul_native = { 159 "native", 160 NULL, 161 sendsig, 162 SYS_syscall, 163 SYS_MAXSYSCALL, 164 sysent, 165 #ifdef SYSCALL_DEBUG 166 syscallnames, 167 #else 168 NULL, 169 #endif 170 0, 171 copyargs, 172 setregs, 173 NULL, 174 coredump_trad, 175 sigcode, 176 esigcode, 177 EMUL_ENABLED | EMUL_NATIVE, 178 }; 179 180 181 /* 182 * System startup; initialize the world, create process 0, mount root 183 * filesystem, and fork to create init and pagedaemon. Most of the 184 * hard work is done in the lower-level initialization routines including 185 * startup(), which does memory initialization and autoconfiguration. 186 */ 187 /* XXX return int, so gcc -Werror won't complain */ 188 int 189 main(void *framep) 190 { 191 struct proc *p; 192 struct process *pr; 193 struct pdevinit *pdev; 194 struct timeval rtv; 195 quad_t lim; 196 int s, i; 197 extern struct pdevinit pdevinit[]; 198 extern void disk_init(void); 199 200 /* 201 * Initialize the current process pointer (curproc) before 202 * any possible traps/probes to simplify trap processing. 203 */ 204 curproc = p = &proc0; 205 p->p_cpu = curcpu(); 206 207 /* 208 * Initialize timeouts. 209 */ 210 timeout_startup(); 211 212 /* 213 * Attempt to find console and initialize 214 * in case of early panic or other messages. 215 */ 216 config_init(); /* init autoconfiguration data structures */ 217 consinit(); 218 219 printf("%s\n", copyright); 220 221 KERNEL_LOCK_INIT(); 222 SCHED_LOCK_INIT(); 223 224 random_init(); 225 226 uvm_init(); 227 disk_init(); /* must come before autoconfiguration */ 228 tty_init(); /* initialise tty's */ 229 cpu_startup(); 230 231 /* 232 * Initialize mbuf's. Do this now because we might attempt to 233 * allocate mbufs or mbuf clusters during autoconfiguration. 234 */ 235 mbinit(); 236 237 /* Initialize sockets. */ 238 soinit(); 239 240 /* 241 * Initialize process and pgrp structures. 242 */ 243 procinit(); 244 245 /* Initialize file locking. */ 246 lf_init(); 247 248 /* 249 * Initialize filedescriptors. 250 */ 251 filedesc_init(); 252 253 /* 254 * Initialize pipes. 255 */ 256 pipe_init(); 257 258 /* 259 * Initialize kqueues. 260 */ 261 kqueue_init(); 262 263 /* 264 * Create process 0 (the swapper). 265 */ 266 267 process0.ps_mainproc = p; 268 TAILQ_INIT(&process0.ps_threads); 269 TAILQ_INSERT_TAIL(&process0.ps_threads, p, p_thr_link); 270 process0.ps_refcnt = 1; 271 p->p_p = pr = &process0; 272 273 /* Set the default routing table/domain. */ 274 process0.ps_rtableid = 0; 275 276 LIST_INSERT_HEAD(&allproc, p, p_list); 277 pr->ps_pgrp = &pgrp0; 278 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 279 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 280 LIST_INIT(&pgrp0.pg_members); 281 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 282 283 pgrp0.pg_session = &session0; 284 session0.s_count = 1; 285 session0.s_leader = pr; 286 287 atomic_setbits_int(&p->p_flag, P_SYSTEM); 288 p->p_stat = SONPROC; 289 pr->ps_nice = NZERO; 290 p->p_emul = &emul_native; 291 bcopy("swapper", p->p_comm, sizeof ("swapper")); 292 293 /* Init timeouts. */ 294 timeout_set(&p->p_sleep_to, endtsleep, p); 295 timeout_set(&pr->ps_realit_to, realitexpire, pr); 296 297 /* Create credentials. */ 298 p->p_cred = &cred0; 299 p->p_ucred = crget(); 300 p->p_ucred->cr_ngroups = 1; /* group 0 */ 301 302 /* Initialize signal state for process 0. */ 303 signal_init(); 304 p->p_sigacts = &sigacts0; 305 siginit(p); 306 307 /* Create the file descriptor table. */ 308 p->p_fd = fdinit(NULL); 309 310 /* Create the limits structures. */ 311 pr->ps_limit = &limit0; 312 for (i = 0; i < nitems(p->p_rlimit); i++) 313 limit0.pl_rlimit[i].rlim_cur = 314 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 315 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 316 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 317 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 318 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 319 lim = ptoa(uvmexp.free); 320 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 321 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 322 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 323 limit0.p_refcnt = 1; 324 325 /* Allocate a prototype map so we have something to fork. */ 326 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 327 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 328 p->p_vmspace = &vmspace0; 329 330 p->p_addr = proc0paddr; /* XXX */ 331 332 /* 333 * Charge root for one process. 334 */ 335 (void)chgproccnt(0, 1); 336 337 /* Initialize run queues */ 338 sched_init_runqueues(); 339 sleep_queue_init(); 340 sched_init_cpu(curcpu()); 341 342 /* Initialize work queues */ 343 workq_init(); 344 345 random_start(); 346 347 /* Initialize the interface/address trees */ 348 ifinit(); 349 350 /* Configure the devices */ 351 cpu_configure(); 352 353 random_hostseed(); 354 355 /* Configure virtual memory system, set vm rlimits. */ 356 uvm_init_limits(p); 357 358 /* Initialize the file systems. */ 359 #if defined(NFSSERVER) || defined(NFSCLIENT) 360 nfs_init(); /* initialize server/shared data */ 361 #endif 362 vfsinit(); 363 364 /* Start real time and statistics clocks. */ 365 initclocks(); 366 367 /* Lock the kernel on behalf of proc0. */ 368 KERNEL_LOCK(); 369 370 #ifdef SYSVSHM 371 /* Initialize System V style shared memory. */ 372 shminit(); 373 #endif 374 375 #ifdef SYSVSEM 376 /* Initialize System V style semaphores. */ 377 seminit(); 378 #endif 379 380 #ifdef SYSVMSG 381 /* Initialize System V style message queues. */ 382 msginit(); 383 #endif 384 385 /* Attach pseudo-devices. */ 386 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 387 if (pdev->pdev_count > 0) 388 (*pdev->pdev_attach)(pdev->pdev_count); 389 390 #ifdef CRYPTO 391 crypto_init(); 392 swcr_init(); 393 #endif /* CRYPTO */ 394 395 /* 396 * Initialize protocols. Block reception of incoming packets 397 * until everything is ready. 398 */ 399 s = splnet(); 400 netisr_init(); 401 domaininit(); 402 if_attachdomain(); 403 splx(s); 404 405 #ifdef GPROF 406 /* Initialize kernel profiling. */ 407 kmstartup(); 408 #endif 409 410 #if !defined(NO_PROPOLICE) 411 { 412 volatile long newguard[8]; 413 414 arc4random_buf((long *)newguard, sizeof(newguard)); 415 416 #ifdef __ELF__ 417 __guard_local = newguard[0]; 418 #endif 419 for (i = nitems(__guard) - 1; i; i--) 420 __guard[i] = newguard[i]; 421 } 422 #endif 423 424 /* init exec and emul */ 425 init_exec(); 426 427 /* Start the scheduler */ 428 scheduler_start(); 429 430 /* 431 * Create process 1 (init(8)). We do this now, as Unix has 432 * historically had init be process 1, and changing this would 433 * probably upset a lot of people. 434 * 435 * Note that process 1 won't immediately exec init(8), but will 436 * wait for us to inform it that the root file system has been 437 * mounted. 438 */ 439 if (fork1(p, SIGCHLD, FORK_FORK, NULL, 0, start_init, NULL, NULL, 440 &initproc)) 441 panic("fork init"); 442 443 /* 444 * Create any kernel threads whose creation was deferred because 445 * initproc had not yet been created. 446 */ 447 kthread_run_deferred_queue(); 448 449 /* 450 * Now that device driver threads have been created, wait for 451 * them to finish any deferred autoconfiguration. Note we don't 452 * need to lock this semaphore, since we haven't booted any 453 * secondary processors, yet. 454 */ 455 while (config_pending) 456 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 457 458 dostartuphooks(); 459 460 #if NMPATH > 0 461 config_rootfound("mpath", NULL); 462 #endif 463 #if NVSCSI > 0 464 config_rootfound("vscsi", NULL); 465 #endif 466 #if NSOFTRAID > 0 467 config_rootfound("softraid", NULL); 468 #endif 469 470 /* Configure root/swap devices */ 471 diskconf(); 472 473 if (mountroot == NULL || ((*mountroot)() != 0)) 474 panic("cannot mount root"); 475 476 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 477 478 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 479 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 480 panic("cannot find root vnode"); 481 p->p_fd->fd_cdir = rootvnode; 482 vref(p->p_fd->fd_cdir); 483 VOP_UNLOCK(rootvnode, 0, p); 484 p->p_fd->fd_rdir = NULL; 485 486 /* 487 * Now that root is mounted, we can fixup initproc's CWD 488 * info. All other processes are kthreads, which merely 489 * share proc0's CWD info. 490 */ 491 initproc->p_fd->fd_cdir = rootvnode; 492 vref(initproc->p_fd->fd_cdir); 493 initproc->p_fd->fd_rdir = NULL; 494 495 /* 496 * Now can look at time, having had a chance to verify the time 497 * from the file system. Reset p->p_rtime as it may have been 498 * munched in mi_switch() after the time got set. 499 */ 500 microtime(&boottime); 501 LIST_FOREACH(p, &allproc, p_list) { 502 p->p_p->ps_start = boottime; 503 microuptime(&p->p_cpu->ci_schedstate.spc_runtime); 504 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 505 } 506 507 uvm_swap_init(); 508 509 /* Create the pageout daemon kernel thread. */ 510 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 511 panic("fork pagedaemon"); 512 513 /* Create the reaper daemon kernel thread. */ 514 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 515 panic("fork reaper"); 516 517 /* Create the cleaner daemon kernel thread. */ 518 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 519 panic("fork cleaner"); 520 521 /* Create the update daemon kernel thread. */ 522 if (kthread_create(start_update, NULL, NULL, "update")) 523 panic("fork update"); 524 525 /* Create the aiodone daemon kernel thread. */ 526 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 527 panic("fork aiodoned"); 528 529 microtime(&rtv); 530 srandom((u_int32_t)(rtv.tv_sec ^ rtv.tv_usec) ^ arc4random()); 531 532 randompid = 1; 533 534 #if defined(MULTIPROCESSOR) 535 /* Boot the secondary processors. */ 536 cpu_boot_secondary_processors(); 537 #endif 538 539 domountroothooks(); 540 541 /* 542 * Okay, now we can let init(8) exec! It's off to userland! 543 */ 544 start_init_exec = 1; 545 wakeup((void *)&start_init_exec); 546 547 /* 548 * proc0: nothing to do, back to sleep 549 */ 550 while (1) 551 tsleep(&proc0, PVM, "scheduler", 0); 552 /* NOTREACHED */ 553 } 554 555 /* 556 * List of paths to try when searching for "init". 557 */ 558 static char *initpaths[] = { 559 "/sbin/init", 560 "/sbin/oinit", 561 "/sbin/init.bak", 562 NULL, 563 }; 564 565 void 566 check_console(struct proc *p) 567 { 568 struct nameidata nd; 569 int error; 570 571 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 572 error = namei(&nd); 573 if (error) { 574 if (error == ENOENT) 575 printf("warning: /dev/console does not exist\n"); 576 else 577 printf("warning: /dev/console error %d\n", error); 578 } else 579 vrele(nd.ni_vp); 580 } 581 582 /* 583 * Start the initial user process; try exec'ing each pathname in "initpaths". 584 * The program is invoked with one argument containing the boot flags. 585 */ 586 void 587 start_init(void *arg) 588 { 589 struct proc *p = arg; 590 vaddr_t addr; 591 struct sys_execve_args /* { 592 syscallarg(const char *) path; 593 syscallarg(char *const *) argp; 594 syscallarg(char *const *) envp; 595 } */ args; 596 int options, error; 597 long i; 598 register_t retval[2]; 599 char flags[4], *flagsp; 600 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 601 602 /* 603 * Now in process 1. 604 */ 605 606 /* 607 * Wait for main() to tell us that it's safe to exec. 608 */ 609 while (start_init_exec == 0) 610 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 611 612 check_console(p); 613 614 /* process 0 ignores SIGCHLD, but we can't */ 615 p->p_sigacts->ps_flags = 0; 616 617 /* 618 * Need just enough stack to hold the faked-up "execve()" arguments. 619 */ 620 #ifdef MACHINE_STACK_GROWS_UP 621 addr = USRSTACK; 622 #else 623 addr = USRSTACK - PAGE_SIZE; 624 #endif 625 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 626 NULL, UVM_UNKNOWN_OFFSET, 0, 627 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_ALL, UVM_INH_COPY, 628 UVM_ADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 629 panic("init: couldn't allocate argument space"); 630 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 631 632 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 633 #ifdef MACHINE_STACK_GROWS_UP 634 ucp = (char *)addr; 635 #else 636 ucp = (char *)(addr + PAGE_SIZE); 637 #endif 638 /* 639 * Construct the boot flag argument. 640 */ 641 flagsp = flags; 642 *flagsp++ = '-'; 643 options = 0; 644 645 if (boothowto & RB_SINGLE) { 646 *flagsp++ = 's'; 647 options = 1; 648 } 649 #ifdef notyet 650 if (boothowto & RB_FASTBOOT) { 651 *flagsp++ = 'f'; 652 options = 1; 653 } 654 #endif 655 656 /* 657 * Move out the flags (arg 1), if necessary. 658 */ 659 if (options != 0) { 660 *flagsp++ = '\0'; 661 i = flagsp - flags; 662 #ifdef DEBUG 663 printf("init: copying out flags `%s' %d\n", flags, i); 664 #endif 665 #ifdef MACHINE_STACK_GROWS_UP 666 arg1 = ucp; 667 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 668 ucp += i; 669 #else 670 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 671 arg1 = ucp; 672 #endif 673 } 674 675 /* 676 * Move out the file name (also arg 0). 677 */ 678 i = strlen(path) + 1; 679 #ifdef DEBUG 680 printf("init: copying out path `%s' %d\n", path, i); 681 #endif 682 #ifdef MACHINE_STACK_GROWS_UP 683 arg0 = ucp; 684 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 685 ucp += i; 686 ucp = (caddr_t)ALIGN((u_long)ucp); 687 uap = (char **)ucp + 3; 688 #else 689 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 690 arg0 = ucp; 691 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 692 #endif 693 694 /* 695 * Move out the arg pointers. 696 */ 697 i = 0; 698 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 699 if (options != 0) 700 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 701 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 702 703 /* 704 * Point at the arguments. 705 */ 706 SCARG(&args, path) = arg0; 707 SCARG(&args, argp) = uap; 708 SCARG(&args, envp) = NULL; 709 710 /* 711 * Now try to exec the program. If can't for any reason 712 * other than it doesn't exist, complain. 713 */ 714 if ((error = sys_execve(p, &args, retval)) == 0) { 715 KERNEL_UNLOCK(); 716 return; 717 } 718 if (error != ENOENT) 719 printf("exec %s: error %d\n", path, error); 720 } 721 printf("init: not found\n"); 722 panic("no init"); 723 } 724 725 void 726 start_update(void *arg) 727 { 728 sched_sync(curproc); 729 /* NOTREACHED */ 730 } 731 732 void 733 start_cleaner(void *arg) 734 { 735 buf_daemon(curproc); 736 /* NOTREACHED */ 737 } 738 739 void 740 start_reaper(void *arg) 741 { 742 reaper(); 743 /* NOTREACHED */ 744 } 745