init_main.c revision 1.380
1 /* $NetBSD: init_main.c,v 1.380 2009/01/11 02:45:51 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 31 * The Regents of the University of California. All rights reserved. 32 * (c) UNIX System Laboratories, Inc. 33 * All or some portions of this file are derived from material licensed 34 * to the University of California by American Telephone and Telegraph 35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36 * the permission of UNIX System Laboratories, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 63 */ 64 65 /* 66 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by the University of 79 * California, Berkeley and its contributors. 80 * 4. Neither the name of the University nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 97 */ 98 99 #include <sys/cdefs.h> 100 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.380 2009/01/11 02:45:51 christos Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_ipsec.h" 104 #include "opt_ntp.h" 105 #include "opt_pipe.h" 106 #include "opt_syscall_debug.h" 107 #include "opt_sysv.h" 108 #include "opt_fileassoc.h" 109 #include "opt_ktrace.h" 110 #include "opt_pax.h" 111 #include "opt_compat_netbsd.h" 112 #include "opt_wapbl.h" 113 114 #include "ksyms.h" 115 #include "rnd.h" 116 #include "sysmon_envsys.h" 117 #include "sysmon_power.h" 118 #include "sysmon_taskq.h" 119 #include "sysmon_wdog.h" 120 #include "veriexec.h" 121 122 #include <sys/param.h> 123 #include <sys/acct.h> 124 #include <sys/filedesc.h> 125 #include <sys/file.h> 126 #include <sys/errno.h> 127 #include <sys/callout.h> 128 #include <sys/cpu.h> 129 #include <sys/kernel.h> 130 #include <sys/mount.h> 131 #include <sys/proc.h> 132 #include <sys/kthread.h> 133 #include <sys/resourcevar.h> 134 #include <sys/signalvar.h> 135 #include <sys/systm.h> 136 #include <sys/vnode.h> 137 #include <sys/fstrans.h> 138 #include <sys/tty.h> 139 #include <sys/conf.h> 140 #include <sys/disklabel.h> 141 #include <sys/buf.h> 142 #include <sys/device.h> 143 #include <sys/exec.h> 144 #include <sys/socketvar.h> 145 #include <sys/protosw.h> 146 #include <sys/percpu.h> 147 #include <sys/pset.h> 148 #include <sys/sysctl.h> 149 #include <sys/reboot.h> 150 #include <sys/user.h> 151 #include <sys/sysctl.h> 152 #include <sys/event.h> 153 #include <sys/mbuf.h> 154 #include <sys/sched.h> 155 #include <sys/sleepq.h> 156 #include <sys/iostat.h> 157 #include <sys/vmem.h> 158 #include <sys/uuid.h> 159 #include <sys/extent.h> 160 #include <sys/disk.h> 161 #include <sys/mqueue.h> 162 #include <sys/msgbuf.h> 163 #include <sys/module.h> 164 #include <sys/event.h> 165 #include <sys/lockf.h> 166 #include <sys/once.h> 167 #include <sys/ksyms.h> 168 #include <sys/uidinfo.h> 169 #include <sys/kprintf.h> 170 #ifdef FAST_IPSEC 171 #include <netipsec/ipsec.h> 172 #endif 173 #ifdef SYSVSHM 174 #include <sys/shm.h> 175 #endif 176 #ifdef SYSVSEM 177 #include <sys/sem.h> 178 #endif 179 #ifdef SYSVMSG 180 #include <sys/msg.h> 181 #endif 182 #include <sys/domain.h> 183 #include <sys/namei.h> 184 #if NRND > 0 185 #include <sys/rnd.h> 186 #endif 187 #include <sys/pipe.h> 188 #if NVERIEXEC > 0 189 #include <sys/verified_exec.h> 190 #endif /* NVERIEXEC > 0 */ 191 #ifdef KTRACE 192 #include <sys/ktrace.h> 193 #endif 194 #include <sys/kauth.h> 195 #ifdef WAPBL 196 #include <sys/wapbl.h> 197 #endif 198 #include <net80211/ieee80211_netbsd.h> 199 200 #include <sys/syscall.h> 201 #include <sys/syscallargs.h> 202 203 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 204 #include <sys/pax.h> 205 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 206 207 #include <ufs/ufs/quota.h> 208 209 #include <miscfs/genfs/genfs.h> 210 #include <miscfs/syncfs/syncfs.h> 211 212 #include <sys/cpu.h> 213 214 #include <uvm/uvm.h> 215 216 #if NSYSMON_TASKQ > 0 217 #include <dev/sysmon/sysmon_taskq.h> 218 #endif 219 220 #include <dev/cons.h> 221 222 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 223 #include <dev/sysmon/sysmonvar.h> 224 #endif 225 226 #include <net/if.h> 227 #include <net/raw_cb.h> 228 229 #include <secmodel/secmodel.h> 230 231 #ifdef COMPAT_50 232 #include <compat/sys/time.h> 233 struct timeval50 boottime50; 234 #endif 235 236 extern struct proc proc0; 237 extern struct lwp lwp0; 238 extern struct cwdinfo cwdi0; 239 extern time_t rootfstime; 240 241 #ifndef curlwp 242 struct lwp *curlwp = &lwp0; 243 #endif 244 struct proc *initproc; 245 246 struct vnode *rootvp, *swapdev_vp; 247 int boothowto; 248 int cold = 1; /* still working on startup */ 249 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 250 251 int start_init_exec; /* semaphore for start_init() */ 252 253 static void check_console(struct lwp *l); 254 static void start_init(void *); 255 void main(void); 256 void ssp_init(void); 257 258 #if defined(__SSP__) || defined(__SSP_ALL__) 259 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 260 void __stack_chk_fail(void); 261 262 void 263 __stack_chk_fail(void) 264 { 265 panic("stack overflow detected; terminated"); 266 } 267 268 void 269 ssp_init(void) 270 { 271 int s; 272 273 #ifdef DIAGNOSTIC 274 printf("Initializing SSP:"); 275 #endif 276 /* 277 * We initialize ssp here carefully: 278 * 1. after we got some entropy 279 * 2. without calling a function 280 */ 281 size_t i; 282 long guard[__arraycount(__stack_chk_guard)]; 283 284 arc4randbytes(guard, sizeof(guard)); 285 s = splhigh(); 286 for (i = 0; i < __arraycount(guard); i++) 287 __stack_chk_guard[i] = guard[i]; 288 splx(s); 289 #ifdef DIAGNOSTIC 290 for (i = 0; i < __arraycount(guard); i++) 291 printf("%lx ", guard[i]); 292 printf("\n"); 293 #endif 294 } 295 #else 296 void 297 ssp_init(void) 298 { 299 300 } 301 #endif 302 303 void __secmodel_none(void); 304 __weak_alias(secmodel_start,__secmodel_none); 305 void 306 __secmodel_none(void) 307 { 308 return; 309 } 310 311 /* 312 * System startup; initialize the world, create process 0, mount root 313 * filesystem, and fork to create init and pagedaemon. Most of the 314 * hard work is done in the lower-level initialization routines including 315 * startup(), which does memory initialization and autoconfiguration. 316 */ 317 void 318 main(void) 319 { 320 struct timespec time; 321 struct lwp *l; 322 struct proc *p; 323 int s, error; 324 #ifdef NVNODE_IMPLICIT 325 int usevnodes; 326 #endif 327 CPU_INFO_ITERATOR cii; 328 struct cpu_info *ci; 329 330 l = &lwp0; 331 #ifndef LWP0_CPU_INFO 332 l->l_cpu = curcpu(); 333 #endif 334 335 /* 336 * Attempt to find console and initialize 337 * in case of early panic or other messages. 338 */ 339 consinit(); 340 341 kernel_lock_init(); 342 once_init(); 343 344 uvm_init(); 345 346 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 347 ksyms_init(); 348 #endif 349 kprintf_init(); 350 351 percpu_init(); 352 353 /* Initialize lock caches. */ 354 mutex_obj_init(); 355 356 /* Initialize the extent manager. */ 357 extent_init(); 358 359 /* Do machine-dependent initialization. */ 360 cpu_startup(); 361 362 /* Initialize the sysctl subsystem. */ 363 sysctl_init(); 364 365 /* Initialize callouts, part 1. */ 366 callout_startup(); 367 368 /* 369 * Initialize the kernel authorization subsystem and start the 370 * default security model, if any. We need to do this early 371 * enough so that subsystems relying on any of the aforementioned 372 * can work properly. Since the security model may dictate the 373 * credential inheritance policy, it is needed at least before 374 * any process is created, specifically proc0. 375 */ 376 kauth_init(); 377 secmodel_start(); 378 379 /* Initialize the buffer cache */ 380 bufinit(); 381 382 /* Initialize sockets. */ 383 soinit(); 384 385 /* 386 * The following things must be done before autoconfiguration. 387 */ 388 evcnt_init(); /* initialize event counters */ 389 #if NRND > 0 390 rnd_init(); /* initialize random number generator */ 391 #endif 392 393 /* Initialize process and pgrp structures. */ 394 procinit(); 395 lwpinit(); 396 397 /* Initialize signal-related data structures. */ 398 signal_init(); 399 400 /* Initialize resource management. */ 401 resource_init(); 402 403 /* Create process 0 (the swapper). */ 404 proc0_init(); 405 406 /* Initialize the UID hash table. */ 407 uid_init(); 408 409 /* Charge root for one process. */ 410 (void)chgproccnt(0, 1); 411 412 /* Initialize timekeeping. */ 413 time_init(); 414 415 /* Initialize the run queues, turnstiles and sleep queues. */ 416 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 417 sched_rqinit(); 418 turnstile_init(); 419 sleeptab_init(&sleeptab); 420 421 /* Initialize processor-sets */ 422 psets_init(); 423 424 /* MI initialization of the boot cpu */ 425 error = mi_cpu_attach(curcpu()); 426 KASSERT(error == 0); 427 428 /* Initialize timekeeping, part 2. */ 429 time_init2(); 430 431 /* 432 * Initialize mbuf's. Do this now because we might attempt to 433 * allocate mbufs or mbuf clusters during autoconfiguration. 434 */ 435 mbinit(); 436 437 /* Initialize I/O statistics. */ 438 iostat_init(); 439 440 /* Initialize the log device. */ 441 loginit(); 442 443 /* Start module system. */ 444 module_init(); 445 446 /* Initialize the file systems. */ 447 #ifdef NVNODE_IMPLICIT 448 /* 449 * If maximum number of vnodes in namei vnode cache is not explicitly 450 * defined in kernel config, adjust the number such as we use roughly 451 * 10% of memory for vnodes and associated data structures in the 452 * assumed worst case. Do not provide fewer than NVNODE vnodes. 453 */ 454 usevnodes = 455 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 456 if (usevnodes > desiredvnodes) 457 desiredvnodes = usevnodes; 458 #endif 459 vfsinit(); 460 lf_init(); 461 462 /* Initialize fstrans. */ 463 fstrans_init(); 464 465 /* Initialize the file descriptor system. */ 466 fd_sys_init(); 467 468 /* Initialize cwd structures */ 469 cwd_sys_init(); 470 471 /* Initialize kqueue. */ 472 kqueue_init(); 473 474 /* Initialize message queues. */ 475 mqueue_sysinit(); 476 477 /* Initialize the system monitor subsystems. */ 478 #if NSYSMON_TASKQ > 0 479 sysmon_task_queue_preinit(); 480 #endif 481 482 #if NSYSMON_ENVSYS > 0 483 sysmon_envsys_init(); 484 #endif 485 486 #if NSYSMON_POWER > 0 487 sysmon_power_init(); 488 #endif 489 490 #if NSYSMON_WDOG > 0 491 sysmon_wdog_init(); 492 #endif 493 494 inittimecounter(); 495 ntp_init(); 496 497 /* Initialize the device switch tables. */ 498 devsw_init(); 499 500 /* Initialize tty subsystem. */ 501 tty_init(); 502 ttyldisc_init(); 503 504 /* Initialize the buffer cache, part 2. */ 505 bufinit2(); 506 507 /* Initialize the disk wedge subsystem. */ 508 dkwedge_init(); 509 510 /* Initialize interfaces. */ 511 ifinit1(); 512 513 /* Configure the system hardware. This will enable interrupts. */ 514 configure(); 515 516 ubc_init(); /* must be after autoconfig */ 517 518 #ifdef SYSVSHM 519 /* Initialize System V style shared memory. */ 520 shminit(); 521 #endif 522 523 #ifdef SYSVSEM 524 /* Initialize System V style semaphores. */ 525 seminit(); 526 #endif 527 528 #ifdef SYSVMSG 529 /* Initialize System V style message queues. */ 530 msginit(); 531 #endif 532 533 #if NVERIEXEC > 0 534 /* 535 * Initialise the Veriexec subsystem. 536 */ 537 veriexec_init(); 538 #endif /* NVERIEXEC > 0 */ 539 540 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 541 pax_init(); 542 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 543 544 #ifdef FAST_IPSEC 545 /* Attach network crypto subsystem */ 546 ipsec_attach(); 547 #endif 548 549 /* 550 * Initialize protocols. Block reception of incoming packets 551 * until everything is ready. 552 */ 553 s = splnet(); 554 ifinit(); 555 domaininit(); 556 if_attachdomain(); 557 splx(s); 558 559 #ifdef GPROF 560 /* Initialize kernel profiling. */ 561 kmstartup(); 562 #endif 563 564 /* Initialize system accounting. */ 565 acct_init(); 566 567 #ifndef PIPE_SOCKETPAIR 568 /* Initialize pipes. */ 569 pipe_init(); 570 #endif 571 572 #ifdef KTRACE 573 /* Initialize ktrace. */ 574 ktrinit(); 575 #endif 576 577 /* Initialize the UUID system calls. */ 578 uuid_init(); 579 580 #ifdef WAPBL 581 /* Initialize write-ahead physical block logging. */ 582 wapbl_init(); 583 #endif 584 585 /* 586 * Create process 1 (init(8)). We do this now, as Unix has 587 * historically had init be process 1, and changing this would 588 * probably upset a lot of people. 589 * 590 * Note that process 1 won't immediately exec init(8), but will 591 * wait for us to inform it that the root file system has been 592 * mounted. 593 */ 594 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 595 panic("fork init"); 596 597 /* 598 * Load any remaining builtin modules, and hand back temporary 599 * storage to the VM system. 600 */ 601 module_init_class(MODULE_CLASS_ANY); 602 603 /* 604 * Finalize configuration now that all real devices have been 605 * found. This needs to be done before the root device is 606 * selected, since finalization may create the root device. 607 */ 608 config_finalize(); 609 610 /* 611 * Now that autoconfiguration has completed, we can determine 612 * the root and dump devices. 613 */ 614 cpu_rootconf(); 615 cpu_dumpconf(); 616 617 /* Mount the root file system. */ 618 do { 619 domountroothook(); 620 if ((error = vfs_mountroot())) { 621 printf("cannot mount root, error = %d\n", error); 622 boothowto |= RB_ASKNAME; 623 setroot(root_device, 624 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 625 } 626 } while (error != 0); 627 mountroothook_destroy(); 628 629 /* 630 * Initialise the time-of-day clock, passing the time recorded 631 * in the root filesystem (if any) for use by systems that 632 * don't have a non-volatile time-of-day device. 633 */ 634 inittodr(rootfstime); 635 636 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 637 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 638 639 /* 640 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 641 * reference it. 642 */ 643 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 644 if (error) 645 panic("cannot find root vnode, error=%d", error); 646 cwdi0.cwdi_cdir = rootvnode; 647 VREF(cwdi0.cwdi_cdir); 648 VOP_UNLOCK(rootvnode, 0); 649 cwdi0.cwdi_rdir = NULL; 650 651 /* 652 * Now that root is mounted, we can fixup initproc's CWD 653 * info. All other processes are kthreads, which merely 654 * share proc0's CWD info. 655 */ 656 initproc->p_cwdi->cwdi_cdir = rootvnode; 657 VREF(initproc->p_cwdi->cwdi_cdir); 658 initproc->p_cwdi->cwdi_rdir = NULL; 659 660 /* 661 * Now can look at time, having had a chance to verify the time 662 * from the file system. Reset l->l_rtime as it may have been 663 * munched in mi_switch() after the time got set. 664 */ 665 getnanotime(&time); 666 boottime = time; 667 #ifdef COMPAT_50 668 { 669 struct timeval tv; 670 TIMESPEC_TO_TIMEVAL(&tv, &time); 671 timeval_to_timeval50(&tv, &boottime50); 672 } 673 #endif 674 mutex_enter(proc_lock); 675 LIST_FOREACH(p, &allproc, p_list) { 676 KASSERT((p->p_flag & PK_MARKER) == 0); 677 mutex_enter(p->p_lock); 678 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 679 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 680 lwp_lock(l); 681 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 682 lwp_unlock(l); 683 } 684 mutex_exit(p->p_lock); 685 } 686 mutex_exit(proc_lock); 687 binuptime(&curlwp->l_stime); 688 689 for (CPU_INFO_FOREACH(cii, ci)) { 690 ci->ci_schedstate.spc_lastmod = time_second; 691 } 692 693 /* Create the pageout daemon kernel thread. */ 694 uvm_swap_init(); 695 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 696 NULL, NULL, "pgdaemon")) 697 panic("fork pagedaemon"); 698 699 /* Create the filesystem syncer kernel thread. */ 700 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 701 NULL, NULL, "ioflush")) 702 panic("fork syncer"); 703 704 /* Create the aiodone daemon kernel thread. */ 705 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 706 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 707 panic("fork aiodoned"); 708 709 vmem_rehash_start(); 710 711 /* Initialize exec structures */ 712 exec_init(1); 713 714 /* 715 * Okay, now we can let init(8) exec! It's off to userland! 716 */ 717 mutex_enter(proc_lock); 718 start_init_exec = 1; 719 cv_broadcast(&lbolt); 720 mutex_exit(proc_lock); 721 722 /* The scheduler is an infinite loop. */ 723 uvm_scheduler(); 724 /* NOTREACHED */ 725 } 726 727 static void 728 check_console(struct lwp *l) 729 { 730 struct nameidata nd; 731 int error; 732 733 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 734 error = namei(&nd); 735 if (error == 0) 736 vrele(nd.ni_vp); 737 else if (error == ENOENT) 738 printf("warning: no /dev/console\n"); 739 else 740 printf("warning: lookup /dev/console: error %d\n", error); 741 } 742 743 /* 744 * List of paths to try when searching for "init". 745 */ 746 static const char * const initpaths[] = { 747 "/sbin/init", 748 "/sbin/oinit", 749 "/sbin/init.bak", 750 NULL, 751 }; 752 753 /* 754 * Start the initial user process; try exec'ing each pathname in "initpaths". 755 * The program is invoked with one argument containing the boot flags. 756 */ 757 static void 758 start_init(void *arg) 759 { 760 struct lwp *l = arg; 761 struct proc *p = l->l_proc; 762 vaddr_t addr; 763 struct sys_execve_args /* { 764 syscallarg(const char *) path; 765 syscallarg(char * const *) argp; 766 syscallarg(char * const *) envp; 767 } */ args; 768 int options, i, error; 769 register_t retval[2]; 770 char flags[4], *flagsp; 771 const char *path, *slash; 772 char *ucp, **uap, *arg0, *arg1 = NULL; 773 char ipath[129]; 774 int ipx, len; 775 776 /* 777 * Now in process 1. 778 */ 779 strncpy(p->p_comm, "init", MAXCOMLEN); 780 781 /* 782 * Wait for main() to tell us that it's safe to exec. 783 */ 784 mutex_enter(proc_lock); 785 while (start_init_exec == 0) 786 cv_wait(&lbolt, proc_lock); 787 mutex_exit(proc_lock); 788 789 /* 790 * This is not the right way to do this. We really should 791 * hand-craft a descriptor onto /dev/console to hand to init, 792 * but that's a _lot_ more work, and the benefit from this easy 793 * hack makes up for the "good is the enemy of the best" effect. 794 */ 795 check_console(l); 796 797 /* 798 * Need just enough stack to hold the faked-up "execve()" arguments. 799 */ 800 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 801 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 802 NULL, UVM_UNKNOWN_OFFSET, 0, 803 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 804 UVM_ADV_NORMAL, 805 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 806 panic("init: couldn't allocate argument space"); 807 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 808 809 ipx = 0; 810 while (1) { 811 if (boothowto & RB_ASKNAME) { 812 printf("init path"); 813 if (initpaths[ipx]) 814 printf(" (default %s)", initpaths[ipx]); 815 printf(": "); 816 len = cngetsn(ipath, sizeof(ipath)-1); 817 if (len == 4 && strcmp(ipath, "halt") == 0) { 818 cpu_reboot(RB_HALT, NULL); 819 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 820 cpu_reboot(0, NULL); 821 #if defined(DDB) 822 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 823 console_debugger(); 824 continue; 825 #endif 826 } else if (len > 0 && ipath[0] == '/') { 827 ipath[len] = '\0'; 828 path = ipath; 829 } else if (len == 0 && initpaths[ipx] != NULL) { 830 path = initpaths[ipx++]; 831 } else { 832 printf("use absolute path, "); 833 #if defined(DDB) 834 printf("\"ddb\", "); 835 #endif 836 printf("\"halt\", or \"reboot\"\n"); 837 continue; 838 } 839 } else { 840 if ((path = initpaths[ipx++]) == NULL) { 841 ipx = 0; 842 boothowto |= RB_ASKNAME; 843 continue; 844 } 845 } 846 847 ucp = (char *)USRSTACK; 848 849 /* 850 * Construct the boot flag argument. 851 */ 852 flagsp = flags; 853 *flagsp++ = '-'; 854 options = 0; 855 856 if (boothowto & RB_SINGLE) { 857 *flagsp++ = 's'; 858 options = 1; 859 } 860 #ifdef notyet 861 if (boothowto & RB_FASTBOOT) { 862 *flagsp++ = 'f'; 863 options = 1; 864 } 865 #endif 866 867 /* 868 * Move out the flags (arg 1), if necessary. 869 */ 870 if (options != 0) { 871 *flagsp++ = '\0'; 872 i = flagsp - flags; 873 #ifdef DEBUG 874 printf("init: copying out flags `%s' %d\n", flags, i); 875 #endif 876 arg1 = STACK_ALLOC(ucp, i); 877 ucp = STACK_MAX(arg1, i); 878 (void)copyout((void *)flags, arg1, i); 879 } 880 881 /* 882 * Move out the file name (also arg 0). 883 */ 884 i = strlen(path) + 1; 885 #ifdef DEBUG 886 printf("init: copying out path `%s' %d\n", path, i); 887 #else 888 if (boothowto & RB_ASKNAME || path != initpaths[0]) 889 printf("init: trying %s\n", path); 890 #endif 891 arg0 = STACK_ALLOC(ucp, i); 892 ucp = STACK_MAX(arg0, i); 893 (void)copyout(path, arg0, i); 894 895 /* 896 * Move out the arg pointers. 897 */ 898 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 899 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 900 SCARG(&args, path) = arg0; 901 SCARG(&args, argp) = uap; 902 SCARG(&args, envp) = NULL; 903 slash = strrchr(path, '/'); 904 if (slash) 905 (void)suword((void *)uap++, 906 (long)arg0 + (slash + 1 - path)); 907 else 908 (void)suword((void *)uap++, (long)arg0); 909 if (options != 0) 910 (void)suword((void *)uap++, (long)arg1); 911 (void)suword((void *)uap++, 0); /* terminator */ 912 913 /* 914 * Now try to exec the program. If can't for any reason 915 * other than it doesn't exist, complain. 916 */ 917 error = sys_execve(l, &args, retval); 918 if (error == 0 || error == EJUSTRETURN) { 919 KERNEL_UNLOCK_LAST(l); 920 return; 921 } 922 printf("exec %s: error %d\n", path, error); 923 } 924 printf("init: not found\n"); 925 panic("no init"); 926 } 927 928 /* 929 * calculate cache size from physmem and vm_map size. 930 */ 931 vaddr_t 932 calc_cache_size(struct vm_map *map, int pct, int va_pct) 933 { 934 paddr_t t; 935 936 /* XXX should consider competing cache if any */ 937 /* XXX should consider submaps */ 938 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 939 if (map != NULL) { 940 vsize_t vsize; 941 942 vsize = vm_map_max(map) - vm_map_min(map); 943 vsize = (uintmax_t)vsize * va_pct / 100; 944 if (t > vsize) { 945 t = vsize; 946 } 947 } 948 return t; 949 } 950
Indexes created Sun Sep 21 20:09:37 GMT 2025