1 /* $NetBSD: init_main.c,v 1.432 2011/06/12 03:35:56 rmind 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 1.432 2011/06/12 03:35:56 rmind 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_sa.h" 108 #include "opt_syscall_debug.h" 109 #include "opt_sysv.h" 110 #include "opt_fileassoc.h" 111 #include "opt_ktrace.h" 112 #include "opt_pax.h" 113 #include "opt_compat_netbsd.h" 114 #include "opt_wapbl.h" 115 #include "opt_ptrace.h" 116 117 #include "drvctl.h" 118 #include "ksyms.h" 119 #include "rnd.h" 120 #include "sysmon_envsys.h" 121 #include "sysmon_power.h" 122 #include "sysmon_taskq.h" 123 #include "sysmon_wdog.h" 124 #include "veriexec.h" 125 126 #include <sys/param.h> 127 #include <sys/acct.h> 128 #include <sys/filedesc.h> 129 #include <sys/file.h> 130 #include <sys/errno.h> 131 #include <sys/callout.h> 132 #include <sys/cpu.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/pset.h> 153 #include <sys/sysctl.h> 154 #include <sys/reboot.h> 155 #include <sys/event.h> 156 #include <sys/mbuf.h> 157 #include <sys/sched.h> 158 #include <sys/sleepq.h> 159 #include <sys/iostat.h> 160 #include <sys/vmem.h> 161 #include <sys/uuid.h> 162 #include <sys/extent.h> 163 #include <sys/disk.h> 164 #include <sys/msgbuf.h> 165 #include <sys/module.h> 166 #include <sys/event.h> 167 #include <sys/lockf.h> 168 #include <sys/once.h> 169 #include <sys/ksyms.h> 170 #include <sys/uidinfo.h> 171 #include <sys/kprintf.h> 172 #ifdef FAST_IPSEC 173 #include <netipsec/ipsec.h> 174 #endif 175 #ifdef SYSVSHM 176 #include <sys/shm.h> 177 #endif 178 #ifdef SYSVSEM 179 #include <sys/sem.h> 180 #endif 181 #ifdef SYSVMSG 182 #include <sys/msg.h> 183 #endif 184 #include <sys/domain.h> 185 #include <sys/namei.h> 186 #if NRND > 0 187 #include <sys/rnd.h> 188 #endif 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 #ifdef KERN_SA 198 #include <sys/savar.h> 199 #endif 200 #include <net80211/ieee80211_netbsd.h> 201 #ifdef PTRACE 202 #include <sys/ptrace.h> 203 #endif /* PTRACE */ 204 205 #include <sys/syscall.h> 206 #include <sys/syscallargs.h> 207 208 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 209 #include <sys/pax.h> 210 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 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 static void check_console(struct lwp *l); 261 static void start_init(void *); 262 static void configure(void); 263 static void configure2(void); 264 static void configure3(void); 265 void main(void); 266 267 /* 268 * System startup; initialize the world, create process 0, mount root 269 * filesystem, and fork to create init and pagedaemon. Most of the 270 * hard work is done in the lower-level initialization routines including 271 * startup(), which does memory initialization and autoconfiguration. 272 */ 273 void 274 main(void) 275 { 276 struct timespec time; 277 struct lwp *l; 278 struct proc *p; 279 int s, error; 280 #ifdef NVNODE_IMPLICIT 281 int usevnodes; 282 #endif 283 CPU_INFO_ITERATOR cii; 284 struct cpu_info *ci; 285 286 l = &lwp0; 287 #ifndef LWP0_CPU_INFO 288 l->l_cpu = curcpu(); 289 #endif 290 l->l_pflag |= LP_RUNNING; 291 292 /* 293 * Attempt to find console and initialize 294 * in case of early panic or other messages. 295 */ 296 consinit(); 297 298 kernel_lock_init(); 299 once_init(); 300 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 301 kernconfig_lock_init(); 302 kthread_sysinit(); 303 304 /* Initialize the device switch tables. */ 305 devsw_init(); 306 307 /* Initialize event counters. */ 308 evcnt_init(); 309 310 uvm_init(); 311 312 prop_kern_init(); 313 314 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 315 ksyms_init(); 316 #endif 317 kprintf_init(); 318 319 percpu_init(); 320 321 /* Initialize lock caches. */ 322 mutex_obj_init(); 323 rw_obj_init(); 324 325 /* Initialize the extent manager. */ 326 extent_init(); 327 328 /* Do machine-dependent initialization. */ 329 cpu_startup(); 330 331 /* Initialize the sysctl subsystem. */ 332 sysctl_init(); 333 334 /* Initialize callouts, part 1. */ 335 callout_startup(); 336 337 /* Initialize the kernel authorization subsystem. */ 338 kauth_init(); 339 340 spec_init(); 341 342 /* 343 * Set BPF op vector. Can't do this in bpf attach, since 344 * network drivers attach before bpf. 345 */ 346 bpf_setops(); 347 348 /* Start module system. */ 349 module_init(); 350 351 /* 352 * Initialize the kernel authorization subsystem and start the 353 * default security model, if any. We need to do this early 354 * enough so that subsystems relying on any of the aforementioned 355 * can work properly. Since the security model may dictate the 356 * credential inheritance policy, it is needed at least before 357 * any process is created, specifically proc0. 358 */ 359 module_init_class(MODULE_CLASS_SECMODEL); 360 361 /* Initialize the buffer cache */ 362 bufinit(); 363 364 /* Initialize sockets. */ 365 soinit(); 366 367 /* 368 * The following things must be done before autoconfiguration. 369 */ 370 #if NRND > 0 371 rnd_init(); /* initialize random number generator */ 372 #endif 373 374 /* Initialize process and pgrp structures. */ 375 #ifdef KERN_SA 376 sa_init(); 377 #endif 378 procinit(); 379 lwpinit(); 380 381 /* Initialize signal-related data structures. */ 382 signal_init(); 383 384 /* Initialize resource management. */ 385 resource_init(); 386 387 /* Create process 0. */ 388 proc0_init(); 389 lwp0_init(); 390 391 /* Disable preemption during boot. */ 392 kpreempt_disable(); 393 394 /* Initialize the UID hash table. */ 395 uid_init(); 396 397 /* Charge root for one process. */ 398 (void)chgproccnt(0, 1); 399 400 /* Initialize timekeeping. */ 401 time_init(); 402 403 /* Initialize the run queues, turnstiles and sleep queues. */ 404 sched_rqinit(); 405 turnstile_init(); 406 sleeptab_init(&sleeptab); 407 408 sched_init(); 409 410 /* Initialize processor-sets */ 411 psets_init(); 412 413 /* MI initialization of the boot cpu */ 414 error = mi_cpu_attach(curcpu()); 415 KASSERT(error == 0); 416 417 /* Initialize timekeeping, part 2. */ 418 time_init2(); 419 420 /* 421 * Initialize mbuf's. Do this now because we might attempt to 422 * allocate mbufs or mbuf clusters during autoconfiguration. 423 */ 424 mbinit(); 425 426 /* Initialize I/O statistics. */ 427 iostat_init(); 428 429 /* Initialize the log device. */ 430 loginit(); 431 432 /* Second part of module system initialization. */ 433 module_start_unload_thread(); 434 435 /* Initialize the file systems. */ 436 #ifdef NVNODE_IMPLICIT 437 /* 438 * If maximum number of vnodes in namei vnode cache is not explicitly 439 * defined in kernel config, adjust the number such as we use roughly 440 * 10% of memory for vnodes and associated data structures in the 441 * assumed worst case. Do not provide fewer than NVNODE vnodes. 442 */ 443 usevnodes = 444 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 445 if (usevnodes > desiredvnodes) 446 desiredvnodes = usevnodes; 447 #endif 448 vfsinit(); 449 lf_init(); 450 451 /* Initialize fstrans. */ 452 fstrans_init(); 453 454 /* Initialize the file descriptor system. */ 455 fd_sys_init(); 456 457 /* Initialize cwd structures */ 458 cwd_sys_init(); 459 460 /* Initialize kqueue. */ 461 kqueue_init(); 462 463 /* Initialize the system monitor subsystems. */ 464 #if NSYSMON_TASKQ > 0 465 sysmon_task_queue_preinit(); 466 #endif 467 468 #if NSYSMON_ENVSYS > 0 469 sysmon_envsys_init(); 470 #endif 471 472 #if NSYSMON_POWER > 0 473 sysmon_power_init(); 474 #endif 475 476 #if NSYSMON_WDOG > 0 477 sysmon_wdog_init(); 478 #endif 479 480 inittimecounter(); 481 ntp_init(); 482 483 /* Initialize tty subsystem. */ 484 tty_init(); 485 ttyldisc_init(); 486 487 /* Initialize the buffer cache, part 2. */ 488 bufinit2(); 489 490 /* Initialize the disk wedge subsystem. */ 491 dkwedge_init(); 492 493 /* Initialize interfaces. */ 494 ifinit1(); 495 496 spldebug_start(); 497 498 /* Configure the system hardware. This will enable interrupts. */ 499 configure(); 500 501 ssp_init(); 502 503 ubc_init(); /* must be after autoconfig */ 504 505 mm_init(); 506 507 configure2(); 508 /* Now timer is working. Enable preemption. */ 509 kpreempt_enable(); 510 511 #ifdef SYSVSHM 512 /* Initialize System V style shared memory. */ 513 shminit(); 514 #endif 515 516 vmem_rehash_start(); /* must be before exec_init */ 517 518 /* Initialize exec structures */ 519 exec_init(1); /* seminit calls exithook_establish() */ 520 521 #ifdef SYSVSEM 522 /* Initialize System V style semaphores. */ 523 seminit(); 524 #endif 525 526 #ifdef SYSVMSG 527 /* Initialize System V style message queues. */ 528 msginit(); 529 #endif 530 531 #if NVERIEXEC > 0 532 /* 533 * Initialise the Veriexec subsystem. 534 */ 535 veriexec_init(); 536 #endif /* NVERIEXEC > 0 */ 537 538 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 539 pax_init(); 540 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 541 542 #ifdef FAST_IPSEC 543 /* Attach network crypto subsystem */ 544 ipsec_attach(); 545 #endif 546 547 /* 548 * Initialize protocols. Block reception of incoming packets 549 * until everything is ready. 550 */ 551 s = splnet(); 552 ifinit(); 553 domaininit(true); 554 if_attachdomain(); 555 splx(s); 556 557 #ifdef GPROF 558 /* Initialize kernel profiling. */ 559 kmstartup(); 560 #endif 561 562 /* Initialize system accounting. */ 563 acct_init(); 564 565 #ifndef PIPE_SOCKETPAIR 566 /* Initialize pipes. */ 567 pipe_init(); 568 #endif 569 570 #ifdef KTRACE 571 /* Initialize ktrace. */ 572 ktrinit(); 573 #endif 574 575 #ifdef PTRACE 576 /* Initialize ptrace. */ 577 ptrace_init(); 578 #endif /* PTRACE */ 579 580 /* Initialize the UUID system calls. */ 581 uuid_init(); 582 583 machdep_init(); 584 585 procinit_sysctl(); 586 587 /* 588 * Create process 1 (init(8)). We do this now, as Unix has 589 * historically had init be process 1, and changing this would 590 * probably upset a lot of people. 591 * 592 * Note that process 1 won't immediately exec init(8), but will 593 * wait for us to inform it that the root file system has been 594 * mounted. 595 */ 596 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 597 panic("fork init"); 598 599 /* 600 * Load any remaining builtin modules, and hand back temporary 601 * storage to the VM system. Then require force when loading any 602 * remaining un-init'ed built-in modules to avoid later surprises. 603 */ 604 module_init_class(MODULE_CLASS_ANY); 605 module_builtin_require_force(); 606 607 /* 608 * Finalize configuration now that all real devices have been 609 * found. This needs to be done before the root device is 610 * selected, since finalization may create the root device. 611 */ 612 config_finalize(); 613 614 sysctl_finalize(); 615 616 /* 617 * Now that autoconfiguration has completed, we can determine 618 * the root and dump devices. 619 */ 620 cpu_rootconf(); 621 cpu_dumpconf(); 622 623 /* Mount the root file system. */ 624 do { 625 domountroothook(root_device); 626 if ((error = vfs_mountroot())) { 627 printf("cannot mount root, error = %d\n", error); 628 boothowto |= RB_ASKNAME; 629 setroot(root_device, 630 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 631 } 632 } while (error != 0); 633 mountroothook_destroy(); 634 635 configure3(); 636 637 /* 638 * Initialise the time-of-day clock, passing the time recorded 639 * in the root filesystem (if any) for use by systems that 640 * don't have a non-volatile time-of-day device. 641 */ 642 inittodr(rootfstime); 643 644 /* 645 * Now can look at time, having had a chance to verify the time 646 * from the file system. Reset l->l_rtime as it may have been 647 * munched in mi_switch() after the time got set. 648 */ 649 getnanotime(&time); 650 boottime = time; 651 #ifdef COMPAT_50 652 { 653 struct timeval tv; 654 TIMESPEC_TO_TIMEVAL(&tv, &time); 655 timeval_to_timeval50(&tv, &boottime50); 656 } 657 #endif 658 mutex_enter(proc_lock); 659 LIST_FOREACH(p, &allproc, p_list) { 660 KASSERT((p->p_flag & PK_MARKER) == 0); 661 mutex_enter(p->p_lock); 662 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 663 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 664 lwp_lock(l); 665 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 666 lwp_unlock(l); 667 } 668 mutex_exit(p->p_lock); 669 } 670 mutex_exit(proc_lock); 671 binuptime(&curlwp->l_stime); 672 673 for (CPU_INFO_FOREACH(cii, ci)) { 674 ci->ci_schedstate.spc_lastmod = time_second; 675 } 676 677 /* Create the pageout daemon kernel thread. */ 678 uvm_swap_init(); 679 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 680 NULL, NULL, "pgdaemon")) 681 panic("fork pagedaemon"); 682 683 /* Create the filesystem syncer kernel thread. */ 684 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 685 NULL, NULL, "ioflush")) 686 panic("fork syncer"); 687 688 /* Create the aiodone daemon kernel thread. */ 689 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 690 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 691 panic("fork aiodoned"); 692 693 /* 694 * Okay, now we can let init(8) exec! It's off to userland! 695 */ 696 mutex_enter(proc_lock); 697 start_init_exec = 1; 698 cv_broadcast(&lbolt); 699 mutex_exit(proc_lock); 700 701 /* The scheduler is an infinite loop. */ 702 uvm_scheduler(); 703 /* NOTREACHED */ 704 } 705 706 /* 707 * Configure the system's hardware. 708 */ 709 static void 710 configure(void) 711 { 712 713 /* Initialize autoconf data structures. */ 714 config_init_mi(); 715 /* 716 * XXX 717 * callout_setfunc() requires mutex(9) so it can't be in config_init() 718 * on amiga and atari which use config_init() and autoconf(9) fucntions 719 * to initialize console devices. 720 */ 721 config_twiddle_init(); 722 723 pmf_init(); 724 #if NDRVCTL > 0 725 drvctl_init(); 726 #endif 727 728 userconf_init(); 729 if (boothowto & RB_USERCONF) 730 userconf_prompt(); 731 732 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 733 printf_nolog("Detecting hardware..."); 734 } 735 736 /* 737 * Do the machine-dependent portion of autoconfiguration. This 738 * sets the configuration machinery here in motion by "finding" 739 * the root bus. When this function returns, we expect interrupts 740 * to be enabled. 741 */ 742 cpu_configure(); 743 } 744 745 static void 746 configure2(void) 747 { 748 CPU_INFO_ITERATOR cii; 749 struct cpu_info *ci; 750 int s; 751 752 /* 753 * Now that we've found all the hardware, start the real time 754 * and statistics clocks. 755 */ 756 initclocks(); 757 758 cold = 0; /* clocks are running, we're warm now! */ 759 s = splsched(); 760 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 761 splx(s); 762 763 /* Boot the secondary processors. */ 764 for (CPU_INFO_FOREACH(cii, ci)) { 765 uvm_cpu_attach(ci); 766 } 767 mp_online = true; 768 #if defined(MULTIPROCESSOR) 769 cpu_boot_secondary_processors(); 770 #endif 771 772 /* Setup the runqueues and scheduler. */ 773 runq_init(); 774 synch_init(); 775 776 /* 777 * Bus scans can make it appear as if the system has paused, so 778 * twiddle constantly while config_interrupts() jobs are running. 779 */ 780 config_twiddle_fn(NULL); 781 782 /* 783 * Create threads to call back and finish configuration for 784 * devices that want interrupts enabled. 785 */ 786 config_create_interruptthreads(); 787 788 /* Get the threads going and into any sleeps before continuing. */ 789 yield(); 790 } 791 792 static void 793 configure3(void) 794 { 795 796 /* 797 * Create threads to call back and finish configuration for 798 * devices that want the mounted root file system. 799 */ 800 config_create_mountrootthreads(); 801 802 /* Get the threads going and into any sleeps before continuing. */ 803 yield(); 804 } 805 806 static void 807 check_console(struct lwp *l) 808 { 809 struct vnode *vp; 810 int error; 811 812 error = namei_simple_kernel("/dev/console", 813 NSM_FOLLOW_NOEMULROOT, &vp); 814 if (error == 0) 815 vrele(vp); 816 else if (error == ENOENT) 817 printf("warning: no /dev/console\n"); 818 else 819 printf("warning: lookup /dev/console: error %d\n", error); 820 } 821 822 /* 823 * List of paths to try when searching for "init". 824 */ 825 static const char * const initpaths[] = { 826 "/sbin/init", 827 "/sbin/oinit", 828 "/sbin/init.bak", 829 NULL, 830 }; 831 832 /* 833 * Start the initial user process; try exec'ing each pathname in "initpaths". 834 * The program is invoked with one argument containing the boot flags. 835 */ 836 static void 837 start_init(void *arg) 838 { 839 struct lwp *l = arg; 840 struct proc *p = l->l_proc; 841 vaddr_t addr; 842 struct sys_execve_args /* { 843 syscallarg(const char *) path; 844 syscallarg(char * const *) argp; 845 syscallarg(char * const *) envp; 846 } */ args; 847 int options, i, error; 848 register_t retval[2]; 849 char flags[4], *flagsp; 850 const char *path, *slash; 851 char *ucp, **uap, *arg0, *arg1 = NULL; 852 char ipath[129]; 853 int ipx, len; 854 855 /* 856 * Now in process 1. 857 */ 858 strncpy(p->p_comm, "init", MAXCOMLEN); 859 860 /* 861 * Wait for main() to tell us that it's safe to exec. 862 */ 863 mutex_enter(proc_lock); 864 while (start_init_exec == 0) 865 cv_wait(&lbolt, proc_lock); 866 mutex_exit(proc_lock); 867 868 /* 869 * This is not the right way to do this. We really should 870 * hand-craft a descriptor onto /dev/console to hand to init, 871 * but that's a _lot_ more work, and the benefit from this easy 872 * hack makes up for the "good is the enemy of the best" effect. 873 */ 874 check_console(l); 875 876 /* 877 * Need just enough stack to hold the faked-up "execve()" arguments. 878 */ 879 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 880 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 881 NULL, UVM_UNKNOWN_OFFSET, 0, 882 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 883 UVM_ADV_NORMAL, 884 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 885 panic("init: couldn't allocate argument space"); 886 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 887 888 ipx = 0; 889 while (1) { 890 if (boothowto & RB_ASKNAME) { 891 printf("init path"); 892 if (initpaths[ipx]) 893 printf(" (default %s)", initpaths[ipx]); 894 printf(": "); 895 len = cngetsn(ipath, sizeof(ipath)-1); 896 if (len == 4 && strcmp(ipath, "halt") == 0) { 897 cpu_reboot(RB_HALT, NULL); 898 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 899 cpu_reboot(0, NULL); 900 #if defined(DDB) 901 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 902 console_debugger(); 903 continue; 904 #endif 905 } else if (len > 0 && ipath[0] == '/') { 906 ipath[len] = '\0'; 907 path = ipath; 908 } else if (len == 0 && initpaths[ipx] != NULL) { 909 path = initpaths[ipx++]; 910 } else { 911 printf("use absolute path, "); 912 #if defined(DDB) 913 printf("\"ddb\", "); 914 #endif 915 printf("\"halt\", or \"reboot\"\n"); 916 continue; 917 } 918 } else { 919 if ((path = initpaths[ipx++]) == NULL) { 920 ipx = 0; 921 boothowto |= RB_ASKNAME; 922 continue; 923 } 924 } 925 926 ucp = (char *)USRSTACK; 927 928 /* 929 * Construct the boot flag argument. 930 */ 931 flagsp = flags; 932 *flagsp++ = '-'; 933 options = 0; 934 935 if (boothowto & RB_SINGLE) { 936 *flagsp++ = 's'; 937 options = 1; 938 } 939 #ifdef notyet 940 if (boothowto & RB_FASTBOOT) { 941 *flagsp++ = 'f'; 942 options = 1; 943 } 944 #endif 945 946 /* 947 * Move out the flags (arg 1), if necessary. 948 */ 949 if (options != 0) { 950 *flagsp++ = '\0'; 951 i = flagsp - flags; 952 #ifdef DEBUG 953 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 954 #endif 955 arg1 = STACK_ALLOC(ucp, i); 956 ucp = STACK_MAX(arg1, i); 957 (void)copyout((void *)flags, arg1, i); 958 } 959 960 /* 961 * Move out the file name (also arg 0). 962 */ 963 i = strlen(path) + 1; 964 #ifdef DEBUG 965 aprint_normal("init: copying out path `%s' %d\n", path, i); 966 #else 967 if (boothowto & RB_ASKNAME || path != initpaths[0]) 968 printf("init: trying %s\n", path); 969 #endif 970 arg0 = STACK_ALLOC(ucp, i); 971 ucp = STACK_MAX(arg0, i); 972 (void)copyout(path, arg0, i); 973 974 /* 975 * Move out the arg pointers. 976 */ 977 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 978 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 979 SCARG(&args, path) = arg0; 980 SCARG(&args, argp) = uap; 981 SCARG(&args, envp) = NULL; 982 slash = strrchr(path, '/'); 983 if (slash) 984 (void)suword((void *)uap++, 985 (long)arg0 + (slash + 1 - path)); 986 else 987 (void)suword((void *)uap++, (long)arg0); 988 if (options != 0) 989 (void)suword((void *)uap++, (long)arg1); 990 (void)suword((void *)uap++, 0); /* terminator */ 991 992 /* 993 * Now try to exec the program. If can't for any reason 994 * other than it doesn't exist, complain. 995 */ 996 error = sys_execve(l, &args, retval); 997 if (error == 0 || error == EJUSTRETURN) { 998 KERNEL_UNLOCK_LAST(l); 999 return; 1000 } 1001 printf("exec %s: error %d\n", path, error); 1002 } 1003 printf("init: not found\n"); 1004 panic("no init"); 1005 } 1006 1007 /* 1008 * calculate cache size (in bytes) from physmem and vm_map size. 1009 */ 1010 vaddr_t 1011 calc_cache_size(struct vm_map *map, int pct, int va_pct) 1012 { 1013 paddr_t t; 1014 1015 /* XXX should consider competing cache if any */ 1016 /* XXX should consider submaps */ 1017 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1018 if (map != NULL) { 1019 vsize_t vsize; 1020 1021 vsize = vm_map_max(map) - vm_map_min(map); 1022 vsize = (uintmax_t)vsize * va_pct / 100; 1023 if (t > vsize) { 1024 t = vsize; 1025 } 1026 } 1027 return t; 1028 } 1029 1030 /* 1031 * Print the system start up banner. 1032 * 1033 * - Print a limited banner if AB_SILENT. 1034 * - Always send normal banner to the log. 1035 */ 1036 #define MEM_PBUFSIZE sizeof("99999 MB") 1037 1038 void 1039 banner(void) 1040 { 1041 static char notice[] = " Notice: this software is " 1042 "protected by copyright"; 1043 char pbuf[81]; 1044 void (*pr)(const char *, ...); 1045 int i; 1046 1047 if ((boothowto & AB_SILENT) != 0) { 1048 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1049 ostype, osrelease, kernel_ident); 1050 printf_nolog("%s", pbuf); 1051 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1052 printf(" "); 1053 printf_nolog("%s\n", notice); 1054 pr = aprint_normal; 1055 } else { 1056 pr = printf; 1057 } 1058 1059 memset(pbuf, 0, sizeof(pbuf)); 1060 (*pr)("%s%s", copyright, version); 1061 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1062 (*pr)("total memory = %s\n", pbuf); 1063 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1064 (*pr)("avail memory = %s\n", pbuf); 1065 } 1066