1 /* $NetBSD: init_main.c,v 1.444 2012/06/14 20:18:16 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 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 1.444 2012/06/14 20:18:16 martin Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_ipsec.h" 104 #include "opt_modular.h" 105 #include "opt_ntp.h" 106 #include "opt_pipe.h" 107 #include "opt_syscall_debug.h" 108 #include "opt_sysv.h" 109 #include "opt_fileassoc.h" 110 #include "opt_ktrace.h" 111 #include "opt_pax.h" 112 #include "opt_compat_netbsd.h" 113 #include "opt_wapbl.h" 114 #include "opt_ptrace.h" 115 116 #include "drvctl.h" 117 #include "ksyms.h" 118 119 #include "sysmon_envsys.h" 120 #include "sysmon_power.h" 121 #include "sysmon_taskq.h" 122 #include "sysmon_wdog.h" 123 #include "veriexec.h" 124 125 #include <sys/param.h> 126 #include <sys/acct.h> 127 #include <sys/filedesc.h> 128 #include <sys/file.h> 129 #include <sys/errno.h> 130 #include <sys/callout.h> 131 #include <sys/cpu.h> 132 #include <sys/cpufreq.h> 133 #include <sys/spldebug.h> 134 #include <sys/kernel.h> 135 #include <sys/mount.h> 136 #include <sys/proc.h> 137 #include <sys/kthread.h> 138 #include <sys/resourcevar.h> 139 #include <sys/signalvar.h> 140 #include <sys/systm.h> 141 #include <sys/vnode.h> 142 #include <sys/fstrans.h> 143 #include <sys/tty.h> 144 #include <sys/conf.h> 145 #include <sys/disklabel.h> 146 #include <sys/buf.h> 147 #include <sys/device.h> 148 #include <sys/exec.h> 149 #include <sys/socketvar.h> 150 #include <sys/protosw.h> 151 #include <sys/percpu.h> 152 #include <sys/pserialize.h> 153 #include <sys/pset.h> 154 #include <sys/sysctl.h> 155 #include <sys/reboot.h> 156 #include <sys/event.h> 157 #include <sys/mbuf.h> 158 #include <sys/sched.h> 159 #include <sys/sleepq.h> 160 #include <sys/iostat.h> 161 #include <sys/vmem.h> 162 #include <sys/uuid.h> 163 #include <sys/extent.h> 164 #include <sys/disk.h> 165 #include <sys/msgbuf.h> 166 #include <sys/module.h> 167 #include <sys/event.h> 168 #include <sys/lockf.h> 169 #include <sys/once.h> 170 #include <sys/kcpuset.h> 171 #include <sys/ksyms.h> 172 #include <sys/uidinfo.h> 173 #include <sys/kprintf.h> 174 #ifdef FAST_IPSEC 175 #include <netipsec/ipsec.h> 176 #endif 177 #ifdef SYSVSHM 178 #include <sys/shm.h> 179 #endif 180 #ifdef SYSVSEM 181 #include <sys/sem.h> 182 #endif 183 #ifdef SYSVMSG 184 #include <sys/msg.h> 185 #endif 186 #include <sys/domain.h> 187 #include <sys/namei.h> 188 #include <sys/rnd.h> 189 #include <sys/pipe.h> 190 #if NVERIEXEC > 0 191 #include <sys/verified_exec.h> 192 #endif /* NVERIEXEC > 0 */ 193 #ifdef KTRACE 194 #include <sys/ktrace.h> 195 #endif 196 #include <sys/kauth.h> 197 #include <net80211/ieee80211_netbsd.h> 198 #ifdef PTRACE 199 #include <sys/ptrace.h> 200 #endif /* PTRACE */ 201 #include <sys/cprng.h> 202 203 #include <sys/syscall.h> 204 #include <sys/syscallargs.h> 205 206 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 207 #include <sys/pax.h> 208 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 209 210 #include <secmodel/secmodel.h> 211 212 #include <ufs/ufs/quota.h> 213 214 #include <miscfs/genfs/genfs.h> 215 #include <miscfs/syncfs/syncfs.h> 216 #include <miscfs/specfs/specdev.h> 217 218 #include <sys/cpu.h> 219 220 #include <uvm/uvm.h> /* extern struct uvm uvm */ 221 222 #if NSYSMON_TASKQ > 0 223 #include <dev/sysmon/sysmon_taskq.h> 224 #endif 225 226 #include <dev/cons.h> 227 228 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 229 #include <dev/sysmon/sysmonvar.h> 230 #endif 231 232 #include <net/bpf.h> 233 #include <net/if.h> 234 #include <net/raw_cb.h> 235 236 #include <prop/proplib.h> 237 238 #ifdef COMPAT_50 239 #include <compat/sys/time.h> 240 struct timeval50 boottime50; 241 #endif 242 243 #include <sys/userconf.h> 244 245 extern struct lwp lwp0; 246 extern time_t rootfstime; 247 248 #ifndef curlwp 249 struct lwp *curlwp = &lwp0; 250 #endif 251 struct proc *initproc; 252 253 struct vnode *rootvp, *swapdev_vp; 254 int boothowto; 255 int cold = 1; /* still working on startup */ 256 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 257 258 int start_init_exec; /* semaphore for start_init() */ 259 260 cprng_strong_t *kern_cprng; 261 262 static void rootconf(void); 263 static void check_console(struct lwp *l); 264 static void start_init(void *); 265 static void configure(void); 266 static void configure2(void); 267 static void configure3(void); 268 void main(void); 269 270 /* 271 * System startup; initialize the world, create process 0, mount root 272 * filesystem, and fork to create init and pagedaemon. Most of the 273 * hard work is done in the lower-level initialization routines including 274 * startup(), which does memory initialization and autoconfiguration. 275 */ 276 void 277 main(void) 278 { 279 struct timespec time; 280 struct lwp *l; 281 struct proc *p; 282 int s, error; 283 #ifdef NVNODE_IMPLICIT 284 int usevnodes; 285 #endif 286 CPU_INFO_ITERATOR cii; 287 struct cpu_info *ci; 288 289 l = &lwp0; 290 #ifndef LWP0_CPU_INFO 291 l->l_cpu = curcpu(); 292 #endif 293 l->l_pflag |= LP_RUNNING; 294 295 /* 296 * Attempt to find console and initialize 297 * in case of early panic or other messages. 298 */ 299 consinit(); 300 301 kernel_lock_init(); 302 once_init(); 303 304 mi_cpu_init(); 305 kernconfig_lock_init(); 306 kthread_sysinit(); 307 308 /* Initialize the device switch tables. */ 309 devsw_init(); 310 311 /* Initialize event counters. */ 312 evcnt_init(); 313 314 uvm_init(); 315 kcpuset_sysinit(); 316 317 prop_kern_init(); 318 319 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 320 ksyms_init(); 321 #endif 322 kprintf_init(); 323 324 percpu_init(); 325 326 /* Initialize lock caches. */ 327 mutex_obj_init(); 328 rw_obj_init(); 329 330 /* Passive serialization. */ 331 pserialize_init(); 332 333 /* Initialize the extent manager. */ 334 extent_init(); 335 336 /* Do machine-dependent initialization. */ 337 cpu_startup(); 338 339 /* Initialize the sysctl subsystem. */ 340 sysctl_init(); 341 342 /* Initialize callouts, part 1. */ 343 callout_startup(); 344 345 /* Initialize the kernel authorization subsystem. */ 346 kauth_init(); 347 348 secmodel_init(); 349 350 spec_init(); 351 352 /* 353 * Set BPF op vector. Can't do this in bpf attach, since 354 * network drivers attach before bpf. 355 */ 356 bpf_setops(); 357 358 /* Start module system. */ 359 module_init(); 360 361 /* 362 * Initialize the kernel authorization subsystem and start the 363 * default security model, if any. We need to do this early 364 * enough so that subsystems relying on any of the aforementioned 365 * can work properly. Since the security model may dictate the 366 * credential inheritance policy, it is needed at least before 367 * any process is created, specifically proc0. 368 */ 369 module_init_class(MODULE_CLASS_SECMODEL); 370 371 /* Initialize the buffer cache */ 372 bufinit(); 373 374 /* Initialize sockets. */ 375 soinit(); 376 377 /* 378 * The following things must be done before autoconfiguration. 379 */ 380 rnd_init(); /* initialize entropy pool */ 381 382 cprng_init(); /* initialize cryptographic PRNG */ 383 384 /* Initialize process and pgrp structures. */ 385 procinit(); 386 lwpinit(); 387 388 /* Initialize signal-related data structures. */ 389 signal_init(); 390 391 /* Initialize resource management. */ 392 resource_init(); 393 394 /* Create process 0. */ 395 proc0_init(); 396 lwp0_init(); 397 398 /* Disable preemption during boot. */ 399 kpreempt_disable(); 400 401 /* Initialize the UID hash table. */ 402 uid_init(); 403 404 /* Charge root for one process. */ 405 (void)chgproccnt(0, 1); 406 407 /* Initialize timekeeping. */ 408 time_init(); 409 410 /* Initialize the run queues, turnstiles and sleep queues. */ 411 sched_rqinit(); 412 turnstile_init(); 413 sleeptab_init(&sleeptab); 414 415 sched_init(); 416 417 /* Initialize processor-sets */ 418 psets_init(); 419 420 /* Initialize cpufreq(9) */ 421 cpufreq_init(); 422 423 /* MI initialization of the boot cpu */ 424 error = mi_cpu_attach(curcpu()); 425 KASSERT(error == 0); 426 427 /* Initialize timekeeping, part 2. */ 428 time_init2(); 429 430 /* 431 * Initialize mbuf's. Do this now because we might attempt to 432 * allocate mbufs or mbuf clusters during autoconfiguration. 433 */ 434 mbinit(); 435 436 /* Initialize I/O statistics. */ 437 iostat_init(); 438 439 /* Initialize the log device. */ 440 loginit(); 441 442 /* Second part of module system initialization. */ 443 module_start_unload_thread(); 444 445 /* Initialize the file systems. */ 446 #ifdef NVNODE_IMPLICIT 447 /* 448 * If maximum number of vnodes in namei vnode cache is not explicitly 449 * defined in kernel config, adjust the number such as we use roughly 450 * 10% of memory for vnodes and associated data structures in the 451 * assumed worst case. Do not provide fewer than NVNODE vnodes. 452 */ 453 usevnodes = 454 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 455 if (usevnodes > desiredvnodes) 456 desiredvnodes = usevnodes; 457 #endif 458 vfsinit(); 459 lf_init(); 460 461 /* Initialize fstrans. */ 462 fstrans_init(); 463 464 /* Initialize the file descriptor system. */ 465 fd_sys_init(); 466 467 /* Initialize cwd structures */ 468 cwd_sys_init(); 469 470 /* Initialize kqueue. */ 471 kqueue_init(); 472 473 /* Initialize the system monitor subsystems. */ 474 #if NSYSMON_TASKQ > 0 475 sysmon_task_queue_preinit(); 476 #endif 477 478 #if NSYSMON_ENVSYS > 0 479 sysmon_envsys_init(); 480 #endif 481 482 #if NSYSMON_POWER > 0 483 sysmon_power_init(); 484 #endif 485 486 #if NSYSMON_WDOG > 0 487 sysmon_wdog_init(); 488 #endif 489 490 inittimecounter(); 491 ntp_init(); 492 493 /* Initialize tty subsystem. */ 494 tty_init(); 495 ttyldisc_init(); 496 497 /* Initialize the buffer cache, part 2. */ 498 bufinit2(); 499 500 /* Initialize the disk wedge subsystem. */ 501 dkwedge_init(); 502 503 /* Initialize the kernel strong PRNG. */ 504 kern_cprng = cprng_strong_create("kernel", IPL_VM, 505 CPRNG_INIT_ANY|CPRNG_REKEY_ANY); 506 507 /* Initialize interfaces. */ 508 ifinit1(); 509 510 spldebug_start(); 511 512 /* Initialize sockets thread(s) */ 513 soinit1(); 514 515 /* Configure the system hardware. This will enable interrupts. */ 516 configure(); 517 518 ssp_init(); 519 520 ubc_init(); /* must be after autoconfig */ 521 522 mm_init(); 523 524 configure2(); 525 /* Now timer is working. Enable preemption. */ 526 kpreempt_enable(); 527 528 #ifdef SYSVSHM 529 /* Initialize System V style shared memory. */ 530 shminit(); 531 #endif 532 533 vmem_rehash_start(); /* must be before exec_init */ 534 535 /* Initialize exec structures */ 536 exec_init(1); /* seminit calls exithook_establish() */ 537 538 #ifdef SYSVSEM 539 /* Initialize System V style semaphores. */ 540 seminit(); 541 #endif 542 543 #ifdef SYSVMSG 544 /* Initialize System V style message queues. */ 545 msginit(); 546 #endif 547 548 #if NVERIEXEC > 0 549 /* 550 * Initialise the Veriexec subsystem. 551 */ 552 veriexec_init(); 553 #endif /* NVERIEXEC > 0 */ 554 555 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 556 pax_init(); 557 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 558 559 #ifdef FAST_IPSEC 560 /* Attach network crypto subsystem */ 561 ipsec_attach(); 562 #endif 563 564 /* 565 * Initialize protocols. Block reception of incoming packets 566 * until everything is ready. 567 */ 568 s = splnet(); 569 ifinit(); 570 domaininit(true); 571 if_attachdomain(); 572 splx(s); 573 574 #ifdef GPROF 575 /* Initialize kernel profiling. */ 576 kmstartup(); 577 #endif 578 579 /* Initialize system accounting. */ 580 acct_init(); 581 582 #ifndef PIPE_SOCKETPAIR 583 /* Initialize pipes. */ 584 pipe_init(); 585 #endif 586 587 #ifdef KTRACE 588 /* Initialize ktrace. */ 589 ktrinit(); 590 #endif 591 592 #ifdef PTRACE 593 /* Initialize ptrace. */ 594 ptrace_init(); 595 #endif /* PTRACE */ 596 597 /* Initialize the UUID system calls. */ 598 uuid_init(); 599 600 machdep_init(); 601 602 procinit_sysctl(); 603 604 /* 605 * Create process 1 (init(8)). We do this now, as Unix has 606 * historically had init be process 1, and changing this would 607 * probably upset a lot of people. 608 * 609 * Note that process 1 won't immediately exec init(8), but will 610 * wait for us to inform it that the root file system has been 611 * mounted. 612 */ 613 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 614 panic("fork init"); 615 616 /* 617 * Load any remaining builtin modules, and hand back temporary 618 * storage to the VM system. Then require force when loading any 619 * remaining un-init'ed built-in modules to avoid later surprises. 620 */ 621 module_init_class(MODULE_CLASS_ANY); 622 module_builtin_require_force(); 623 624 /* 625 * Finalize configuration now that all real devices have been 626 * found. This needs to be done before the root device is 627 * selected, since finalization may create the root device. 628 */ 629 config_finalize(); 630 631 sysctl_finalize(); 632 633 /* 634 * Now that autoconfiguration has completed, we can determine 635 * the root and dump devices. 636 */ 637 rootconf(); 638 cpu_dumpconf(); 639 640 /* Mount the root file system. */ 641 do { 642 domountroothook(root_device); 643 if ((error = vfs_mountroot())) { 644 printf("cannot mount root, error = %d\n", error); 645 boothowto |= RB_ASKNAME; 646 setroot(root_device, 647 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 648 } 649 } while (error != 0); 650 mountroothook_destroy(); 651 652 configure3(); 653 654 /* 655 * Initialise the time-of-day clock, passing the time recorded 656 * in the root filesystem (if any) for use by systems that 657 * don't have a non-volatile time-of-day device. 658 */ 659 inittodr(rootfstime); 660 661 /* 662 * Now can look at time, having had a chance to verify the time 663 * from the file system. Reset l->l_rtime as it may have been 664 * munched in mi_switch() after the time got set. 665 */ 666 getnanotime(&time); 667 boottime = time; 668 #ifdef COMPAT_50 669 { 670 struct timeval tv; 671 TIMESPEC_TO_TIMEVAL(&tv, &time); 672 timeval_to_timeval50(&tv, &boottime50); 673 } 674 #endif 675 mutex_enter(proc_lock); 676 LIST_FOREACH(p, &allproc, p_list) { 677 KASSERT((p->p_flag & PK_MARKER) == 0); 678 mutex_enter(p->p_lock); 679 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 680 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 681 lwp_lock(l); 682 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 683 lwp_unlock(l); 684 } 685 mutex_exit(p->p_lock); 686 } 687 mutex_exit(proc_lock); 688 binuptime(&curlwp->l_stime); 689 690 for (CPU_INFO_FOREACH(cii, ci)) { 691 ci->ci_schedstate.spc_lastmod = time_second; 692 } 693 694 /* Create the pageout daemon kernel thread. */ 695 uvm_swap_init(); 696 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 697 NULL, NULL, "pgdaemon")) 698 panic("fork pagedaemon"); 699 700 /* Create the filesystem syncer kernel thread. */ 701 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 702 NULL, NULL, "ioflush")) 703 panic("fork syncer"); 704 705 /* Create the aiodone daemon kernel thread. */ 706 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 707 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 708 panic("fork aiodoned"); 709 710 /* 711 * Okay, now we can let init(8) exec! It's off to userland! 712 */ 713 mutex_enter(proc_lock); 714 start_init_exec = 1; 715 cv_broadcast(&lbolt); 716 mutex_exit(proc_lock); 717 718 /* The scheduler is an infinite loop. */ 719 uvm_scheduler(); 720 /* NOTREACHED */ 721 } 722 723 /* 724 * Configure the system's hardware. 725 */ 726 static void 727 configure(void) 728 { 729 730 /* Initialize autoconf data structures. */ 731 config_init_mi(); 732 /* 733 * XXX 734 * callout_setfunc() requires mutex(9) so it can't be in config_init() 735 * on amiga and atari which use config_init() and autoconf(9) fucntions 736 * to initialize console devices. 737 */ 738 config_twiddle_init(); 739 740 pmf_init(); 741 #if NDRVCTL > 0 742 drvctl_init(); 743 #endif 744 745 userconf_init(); 746 if (boothowto & RB_USERCONF) 747 userconf_prompt(); 748 749 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 750 printf_nolog("Detecting hardware..."); 751 } 752 753 /* 754 * Do the machine-dependent portion of autoconfiguration. This 755 * sets the configuration machinery here in motion by "finding" 756 * the root bus. When this function returns, we expect interrupts 757 * to be enabled. 758 */ 759 cpu_configure(); 760 } 761 762 static void 763 configure2(void) 764 { 765 CPU_INFO_ITERATOR cii; 766 struct cpu_info *ci; 767 int s; 768 769 /* 770 * Now that we've found all the hardware, start the real time 771 * and statistics clocks. 772 */ 773 initclocks(); 774 775 cold = 0; /* clocks are running, we're warm now! */ 776 s = splsched(); 777 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 778 splx(s); 779 780 /* Boot the secondary processors. */ 781 for (CPU_INFO_FOREACH(cii, ci)) { 782 uvm_cpu_attach(ci); 783 } 784 mp_online = true; 785 #if defined(MULTIPROCESSOR) 786 cpu_boot_secondary_processors(); 787 #endif 788 789 /* Setup the runqueues and scheduler. */ 790 runq_init(); 791 synch_init(); 792 793 /* 794 * Bus scans can make it appear as if the system has paused, so 795 * twiddle constantly while config_interrupts() jobs are running. 796 */ 797 config_twiddle_fn(NULL); 798 799 /* 800 * Create threads to call back and finish configuration for 801 * devices that want interrupts enabled. 802 */ 803 config_create_interruptthreads(); 804 805 /* Get the threads going and into any sleeps before continuing. */ 806 yield(); 807 } 808 809 static void 810 configure3(void) 811 { 812 813 /* 814 * Create threads to call back and finish configuration for 815 * devices that want the mounted root file system. 816 */ 817 config_create_mountrootthreads(); 818 819 /* Get the threads going and into any sleeps before continuing. */ 820 yield(); 821 } 822 823 static void 824 rootconf_handle_wedges(void) 825 { 826 struct partinfo dpart; 827 struct partition *p; 828 struct vnode *vp; 829 daddr_t startblk; 830 uint64_t nblks; 831 device_t dev; 832 int error; 833 834 if (booted_nblks) { 835 /* 836 * bootloader passed geometry 837 */ 838 dev = booted_device; 839 startblk = booted_startblk; 840 nblks = booted_nblks; 841 842 /* 843 * keep booted_device and booted_partition 844 * in case the kernel doesn't identify a wedge 845 */ 846 } else { 847 /* 848 * bootloader passed partition number 849 * 850 * We cannot ask the partition device directly when it is 851 * covered by a wedge. Instead we look up the geometry in 852 * the disklabel. 853 */ 854 vp = opendisk(booted_device); 855 856 if (vp == NULL) 857 return; 858 859 error = VOP_IOCTL(vp, DIOCGPART, &dpart, FREAD, NOCRED); 860 VOP_CLOSE(vp, FREAD, NOCRED); 861 vput(vp); 862 if (error) 863 return; 864 865 KASSERT(booted_partition >= 0 866 && booted_partition < MAXPARTITIONS); 867 868 p = &dpart.disklab->d_partitions[booted_partition]; 869 870 dev = booted_device; 871 startblk = p->p_offset; 872 nblks = p->p_size; 873 } 874 875 dev = dkwedge_find_partition(dev, startblk, nblks); 876 if (dev != NULL) { 877 booted_device = dev; 878 booted_partition = 0; 879 } 880 } 881 882 static void 883 rootconf(void) 884 { 885 cpu_rootconf(); 886 887 if (booted_device == NULL) 888 return; 889 890 rootconf_handle_wedges(); 891 892 setroot(booted_device, booted_partition); 893 } 894 895 static void 896 check_console(struct lwp *l) 897 { 898 struct vnode *vp; 899 int error; 900 901 error = namei_simple_kernel("/dev/console", 902 NSM_FOLLOW_NOEMULROOT, &vp); 903 if (error == 0) 904 vrele(vp); 905 else if (error == ENOENT) 906 printf("warning: no /dev/console\n"); 907 else 908 printf("warning: lookup /dev/console: error %d\n", error); 909 } 910 911 /* 912 * List of paths to try when searching for "init". 913 */ 914 static const char * const initpaths[] = { 915 "/sbin/init", 916 "/sbin/oinit", 917 "/sbin/init.bak", 918 NULL, 919 }; 920 921 /* 922 * Start the initial user process; try exec'ing each pathname in "initpaths". 923 * The program is invoked with one argument containing the boot flags. 924 */ 925 static void 926 start_init(void *arg) 927 { 928 struct lwp *l = arg; 929 struct proc *p = l->l_proc; 930 vaddr_t addr; 931 struct sys_execve_args /* { 932 syscallarg(const char *) path; 933 syscallarg(char * const *) argp; 934 syscallarg(char * const *) envp; 935 } */ args; 936 int options, i, error; 937 register_t retval[2]; 938 char flags[4], *flagsp; 939 const char *path, *slash; 940 char *ucp, **uap, *arg0, *arg1 = NULL; 941 char ipath[129]; 942 int ipx, len; 943 944 /* 945 * Now in process 1. 946 */ 947 strncpy(p->p_comm, "init", MAXCOMLEN); 948 949 /* 950 * Wait for main() to tell us that it's safe to exec. 951 */ 952 mutex_enter(proc_lock); 953 while (start_init_exec == 0) 954 cv_wait(&lbolt, proc_lock); 955 mutex_exit(proc_lock); 956 957 /* 958 * This is not the right way to do this. We really should 959 * hand-craft a descriptor onto /dev/console to hand to init, 960 * but that's a _lot_ more work, and the benefit from this easy 961 * hack makes up for the "good is the enemy of the best" effect. 962 */ 963 check_console(l); 964 965 /* 966 * Need just enough stack to hold the faked-up "execve()" arguments. 967 */ 968 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 969 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 970 NULL, UVM_UNKNOWN_OFFSET, 0, 971 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 972 UVM_ADV_NORMAL, 973 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 974 panic("init: couldn't allocate argument space"); 975 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 976 977 ipx = 0; 978 while (1) { 979 if (boothowto & RB_ASKNAME) { 980 printf("init path"); 981 if (initpaths[ipx]) 982 printf(" (default %s)", initpaths[ipx]); 983 printf(": "); 984 len = cngetsn(ipath, sizeof(ipath)-1); 985 if (len == 4 && strcmp(ipath, "halt") == 0) { 986 cpu_reboot(RB_HALT, NULL); 987 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 988 cpu_reboot(0, NULL); 989 #if defined(DDB) 990 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 991 console_debugger(); 992 continue; 993 #endif 994 } else if (len > 0 && ipath[0] == '/') { 995 ipath[len] = '\0'; 996 path = ipath; 997 } else if (len == 0 && initpaths[ipx] != NULL) { 998 path = initpaths[ipx++]; 999 } else { 1000 printf("use absolute path, "); 1001 #if defined(DDB) 1002 printf("\"ddb\", "); 1003 #endif 1004 printf("\"halt\", or \"reboot\"\n"); 1005 continue; 1006 } 1007 } else { 1008 if ((path = initpaths[ipx++]) == NULL) { 1009 ipx = 0; 1010 boothowto |= RB_ASKNAME; 1011 continue; 1012 } 1013 } 1014 1015 ucp = (char *)USRSTACK; 1016 1017 /* 1018 * Construct the boot flag argument. 1019 */ 1020 flagsp = flags; 1021 *flagsp++ = '-'; 1022 options = 0; 1023 1024 if (boothowto & RB_SINGLE) { 1025 *flagsp++ = 's'; 1026 options = 1; 1027 } 1028 #ifdef notyet 1029 if (boothowto & RB_FASTBOOT) { 1030 *flagsp++ = 'f'; 1031 options = 1; 1032 } 1033 #endif 1034 1035 /* 1036 * Move out the flags (arg 1), if necessary. 1037 */ 1038 if (options != 0) { 1039 *flagsp++ = '\0'; 1040 i = flagsp - flags; 1041 #ifdef DEBUG 1042 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1043 #endif 1044 arg1 = STACK_ALLOC(ucp, i); 1045 ucp = STACK_MAX(arg1, i); 1046 (void)copyout((void *)flags, arg1, i); 1047 } 1048 1049 /* 1050 * Move out the file name (also arg 0). 1051 */ 1052 i = strlen(path) + 1; 1053 #ifdef DEBUG 1054 aprint_normal("init: copying out path `%s' %d\n", path, i); 1055 #else 1056 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1057 printf("init: trying %s\n", path); 1058 #endif 1059 arg0 = STACK_ALLOC(ucp, i); 1060 ucp = STACK_MAX(arg0, i); 1061 (void)copyout(path, arg0, i); 1062 1063 /* 1064 * Move out the arg pointers. 1065 */ 1066 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1067 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 1068 SCARG(&args, path) = arg0; 1069 SCARG(&args, argp) = uap; 1070 SCARG(&args, envp) = NULL; 1071 slash = strrchr(path, '/'); 1072 if (slash) 1073 (void)suword((void *)uap++, 1074 (long)arg0 + (slash + 1 - path)); 1075 else 1076 (void)suword((void *)uap++, (long)arg0); 1077 if (options != 0) 1078 (void)suword((void *)uap++, (long)arg1); 1079 (void)suword((void *)uap++, 0); /* terminator */ 1080 1081 /* 1082 * Now try to exec the program. If can't for any reason 1083 * other than it doesn't exist, complain. 1084 */ 1085 error = sys_execve(l, &args, retval); 1086 if (error == 0 || error == EJUSTRETURN) { 1087 KERNEL_UNLOCK_LAST(l); 1088 return; 1089 } 1090 printf("exec %s: error %d\n", path, error); 1091 } 1092 printf("init: not found\n"); 1093 panic("no init"); 1094 } 1095 1096 /* 1097 * calculate cache size (in bytes) from physmem and vm_map size. 1098 */ 1099 vaddr_t 1100 calc_cache_size(struct vm_map *map, int pct, int va_pct) 1101 { 1102 paddr_t t; 1103 1104 /* XXX should consider competing cache if any */ 1105 /* XXX should consider submaps */ 1106 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1107 if (map != NULL) { 1108 vsize_t vsize; 1109 1110 vsize = vm_map_max(map) - vm_map_min(map); 1111 vsize = (uintmax_t)vsize * va_pct / 100; 1112 if (t > vsize) { 1113 t = vsize; 1114 } 1115 } 1116 return t; 1117 } 1118 1119 /* 1120 * Print the system start up banner. 1121 * 1122 * - Print a limited banner if AB_SILENT. 1123 * - Always send normal banner to the log. 1124 */ 1125 #define MEM_PBUFSIZE sizeof("99999 MB") 1126 1127 void 1128 banner(void) 1129 { 1130 static char notice[] = " Notice: this software is " 1131 "protected by copyright"; 1132 char pbuf[81]; 1133 void (*pr)(const char *, ...); 1134 int i; 1135 1136 if ((boothowto & AB_SILENT) != 0) { 1137 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1138 ostype, osrelease, kernel_ident); 1139 printf_nolog("%s", pbuf); 1140 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1141 printf(" "); 1142 printf_nolog("%s\n", notice); 1143 pr = aprint_normal; 1144 } else { 1145 pr = printf; 1146 } 1147 1148 memset(pbuf, 0, sizeof(pbuf)); 1149 (*pr)("%s%s", copyright, version); 1150 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1151 (*pr)("total memory = %s\n", pbuf); 1152 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1153 (*pr)("avail memory = %s\n", pbuf); 1154 } 1155