1 /* $NetBSD: init_main.c,v 1.422 2010/06/26 07:23:57 pgoyette 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 1.422 2010/06/26 07:23:57 pgoyette 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> 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 #ifdef _KERNEL_OPT 244 #include "opt_userconf.h" 245 #endif 246 #ifdef USERCONF 247 #include <sys/userconf.h> 248 #endif 249 250 extern struct lwp lwp0; 251 extern time_t rootfstime; 252 253 #ifndef curlwp 254 struct lwp *curlwp = &lwp0; 255 #endif 256 struct proc *initproc; 257 258 struct vnode *rootvp, *swapdev_vp; 259 int boothowto; 260 int cold = 1; /* still working on startup */ 261 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 262 263 int start_init_exec; /* semaphore for start_init() */ 264 265 static void check_console(struct lwp *l); 266 static void start_init(void *); 267 static void configure(void); 268 static void configure2(void); 269 static void configure3(void); 270 void main(void); 271 272 /* 273 * System startup; initialize the world, create process 0, mount root 274 * filesystem, and fork to create init and pagedaemon. Most of the 275 * hard work is done in the lower-level initialization routines including 276 * startup(), which does memory initialization and autoconfiguration. 277 */ 278 void 279 main(void) 280 { 281 struct timespec time; 282 struct lwp *l; 283 struct proc *p; 284 int s, error; 285 #ifdef NVNODE_IMPLICIT 286 int usevnodes; 287 #endif 288 CPU_INFO_ITERATOR cii; 289 struct cpu_info *ci; 290 291 l = &lwp0; 292 #ifndef LWP0_CPU_INFO 293 l->l_cpu = curcpu(); 294 #endif 295 l->l_pflag |= LP_RUNNING; 296 297 /* 298 * Attempt to find console and initialize 299 * in case of early panic or other messages. 300 */ 301 consinit(); 302 303 kernel_lock_init(); 304 once_init(); 305 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 306 307 /* Initialize the device switch tables. */ 308 devsw_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 evcnt_init(); /* initialize event counters */ 371 #if NRND > 0 372 rnd_init(); /* initialize random number generator */ 373 #endif 374 375 /* Initialize process and pgrp structures. */ 376 #ifdef KERN_SA 377 sa_init(); 378 #endif 379 procinit(); 380 lwpinit(); 381 382 /* Initialize signal-related data structures. */ 383 signal_init(); 384 385 /* Initialize resource management. */ 386 resource_init(); 387 388 /* Create process 0. */ 389 proc0_init(); 390 lwp0_init(); 391 392 /* Disable preemption during boot. */ 393 kpreempt_disable(); 394 395 /* Initialize the UID hash table. */ 396 uid_init(); 397 398 /* Charge root for one process. */ 399 (void)chgproccnt(0, 1); 400 401 /* Initialize timekeeping. */ 402 time_init(); 403 404 /* Initialize the run queues, turnstiles and sleep queues. */ 405 sched_rqinit(); 406 turnstile_init(); 407 sleeptab_init(&sleeptab); 408 409 sched_init(); 410 411 /* Initialize processor-sets */ 412 psets_init(); 413 414 /* MI initialization of the boot cpu */ 415 error = mi_cpu_attach(curcpu()); 416 KASSERT(error == 0); 417 418 /* Initialize timekeeping, part 2. */ 419 time_init2(); 420 421 /* 422 * Initialize mbuf's. Do this now because we might attempt to 423 * allocate mbufs or mbuf clusters during autoconfiguration. 424 */ 425 mbinit(); 426 427 /* Initialize I/O statistics. */ 428 iostat_init(); 429 430 /* Initialize the log device. */ 431 loginit(); 432 433 /* Second part of module system initialization. */ 434 module_start_unload_thread(); 435 436 /* Initialize the file systems. */ 437 #ifdef NVNODE_IMPLICIT 438 /* 439 * If maximum number of vnodes in namei vnode cache is not explicitly 440 * defined in kernel config, adjust the number such as we use roughly 441 * 10% of memory for vnodes and associated data structures in the 442 * assumed worst case. Do not provide fewer than NVNODE vnodes. 443 */ 444 usevnodes = 445 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 446 if (usevnodes > desiredvnodes) 447 desiredvnodes = usevnodes; 448 #endif 449 vfsinit(); 450 lf_init(); 451 452 /* Initialize fstrans. */ 453 fstrans_init(); 454 455 /* Initialize the file descriptor system. */ 456 fd_sys_init(); 457 458 /* Initialize cwd structures */ 459 cwd_sys_init(); 460 461 /* Initialize kqueue. */ 462 kqueue_init(); 463 464 /* Initialize the system monitor subsystems. */ 465 #if NSYSMON_TASKQ > 0 466 sysmon_task_queue_preinit(); 467 #endif 468 469 #if NSYSMON_ENVSYS > 0 470 sysmon_envsys_init(); 471 #endif 472 473 #if NSYSMON_POWER > 0 474 sysmon_power_init(); 475 #endif 476 477 #if NSYSMON_WDOG > 0 478 sysmon_wdog_init(); 479 #endif 480 481 inittimecounter(); 482 ntp_init(); 483 484 /* Initialize tty subsystem. */ 485 tty_init(); 486 ttyldisc_init(); 487 488 /* Initialize the buffer cache, part 2. */ 489 bufinit2(); 490 491 /* Initialize the disk wedge subsystem. */ 492 dkwedge_init(); 493 494 /* Initialize interfaces. */ 495 ifinit1(); 496 497 spldebug_start(); 498 499 /* Configure the system hardware. This will enable interrupts. */ 500 configure(); 501 502 ssp_init(); 503 504 configure2(); 505 /* Now timer is working. Enable preemption. */ 506 kpreempt_enable(); 507 508 ubc_init(); /* must be after autoconfig */ 509 510 #ifdef SYSVSHM 511 /* Initialize System V style shared memory. */ 512 shminit(); 513 #endif 514 515 vmem_rehash_start(); /* must be before exec_init */ 516 517 /* Initialize exec structures */ 518 exec_init(1); /* seminit calls exithook_establish() */ 519 520 #ifdef SYSVSEM 521 /* Initialize System V style semaphores. */ 522 seminit(); 523 #endif 524 525 #ifdef SYSVMSG 526 /* Initialize System V style message queues. */ 527 msginit(); 528 #endif 529 530 #if NVERIEXEC > 0 531 /* 532 * Initialise the Veriexec subsystem. 533 */ 534 veriexec_init(); 535 #endif /* NVERIEXEC > 0 */ 536 537 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 538 pax_init(); 539 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 540 541 #ifdef FAST_IPSEC 542 /* Attach network crypto subsystem */ 543 ipsec_attach(); 544 #endif 545 546 /* 547 * Initialize protocols. Block reception of incoming packets 548 * until everything is ready. 549 */ 550 s = splnet(); 551 ifinit(); 552 domaininit(true); 553 if_attachdomain(); 554 splx(s); 555 556 #ifdef GPROF 557 /* Initialize kernel profiling. */ 558 kmstartup(); 559 #endif 560 561 /* Initialize system accounting. */ 562 acct_init(); 563 564 #ifndef PIPE_SOCKETPAIR 565 /* Initialize pipes. */ 566 pipe_init(); 567 #endif 568 569 #ifdef KTRACE 570 /* Initialize ktrace. */ 571 ktrinit(); 572 #endif 573 574 #ifdef PTRACE 575 /* Initialize ptrace. */ 576 ptrace_init(); 577 #endif /* PTRACE */ 578 579 /* Initialize the UUID system calls. */ 580 uuid_init(); 581 582 machdep_init(); 583 584 /* 585 * Create process 1 (init(8)). We do this now, as Unix has 586 * historically had init be process 1, and changing this would 587 * probably upset a lot of people. 588 * 589 * Note that process 1 won't immediately exec init(8), but will 590 * wait for us to inform it that the root file system has been 591 * mounted. 592 */ 593 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 594 panic("fork init"); 595 596 /* 597 * Load any remaining builtin modules, and hand back temporary 598 * storage to the VM system. Then require force when loading any 599 * remaining un-init'ed built-in modules to avoid later surprises. 600 */ 601 module_init_class(MODULE_CLASS_ANY); 602 module_builtin_require_force(); 603 604 /* 605 * Finalize configuration now that all real devices have been 606 * found. This needs to be done before the root device is 607 * selected, since finalization may create the root device. 608 */ 609 config_finalize(); 610 611 sysctl_finalize(); 612 613 /* 614 * Now that autoconfiguration has completed, we can determine 615 * the root and dump devices. 616 */ 617 cpu_rootconf(); 618 cpu_dumpconf(); 619 620 /* Mount the root file system. */ 621 do { 622 domountroothook(root_device); 623 if ((error = vfs_mountroot())) { 624 printf("cannot mount root, error = %d\n", error); 625 boothowto |= RB_ASKNAME; 626 setroot(root_device, 627 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 628 } 629 } while (error != 0); 630 mountroothook_destroy(); 631 632 configure3(); 633 634 /* 635 * Initialise the time-of-day clock, passing the time recorded 636 * in the root filesystem (if any) for use by systems that 637 * don't have a non-volatile time-of-day device. 638 */ 639 inittodr(rootfstime); 640 641 /* 642 * Now can look at time, having had a chance to verify the time 643 * from the file system. Reset l->l_rtime as it may have been 644 * munched in mi_switch() after the time got set. 645 */ 646 getnanotime(&time); 647 boottime = time; 648 #ifdef COMPAT_50 649 { 650 struct timeval tv; 651 TIMESPEC_TO_TIMEVAL(&tv, &time); 652 timeval_to_timeval50(&tv, &boottime50); 653 } 654 #endif 655 mutex_enter(proc_lock); 656 LIST_FOREACH(p, &allproc, p_list) { 657 KASSERT((p->p_flag & PK_MARKER) == 0); 658 mutex_enter(p->p_lock); 659 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 660 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 661 lwp_lock(l); 662 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 663 lwp_unlock(l); 664 } 665 mutex_exit(p->p_lock); 666 } 667 mutex_exit(proc_lock); 668 binuptime(&curlwp->l_stime); 669 670 for (CPU_INFO_FOREACH(cii, ci)) { 671 ci->ci_schedstate.spc_lastmod = time_second; 672 } 673 674 /* Create the pageout daemon kernel thread. */ 675 uvm_swap_init(); 676 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 677 NULL, NULL, "pgdaemon")) 678 panic("fork pagedaemon"); 679 680 /* Create the filesystem syncer kernel thread. */ 681 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 682 NULL, NULL, "ioflush")) 683 panic("fork syncer"); 684 685 /* Create the aiodone daemon kernel thread. */ 686 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 687 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 688 panic("fork aiodoned"); 689 690 /* 691 * Okay, now we can let init(8) exec! It's off to userland! 692 */ 693 mutex_enter(proc_lock); 694 start_init_exec = 1; 695 cv_broadcast(&lbolt); 696 mutex_exit(proc_lock); 697 698 /* The scheduler is an infinite loop. */ 699 uvm_scheduler(); 700 /* NOTREACHED */ 701 } 702 703 /* 704 * Configure the system's hardware. 705 */ 706 static void 707 configure(void) 708 { 709 710 /* Initialize autoconf data structures. */ 711 config_init_mi(); 712 /* 713 * XXX 714 * callout_setfunc() requires mutex(9) so it can't be in config_init() 715 * on amiga and atari which use config_init() and autoconf(9) fucntions 716 * to initialize console devices. 717 */ 718 config_twiddle_init(); 719 720 pmf_init(); 721 #if NDRVCTL > 0 722 drvctl_init(); 723 #endif 724 725 #ifdef USERCONF 726 if (boothowto & RB_USERCONF) 727 user_config(); 728 #endif 729 730 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 731 printf_nolog("Detecting hardware..."); 732 } 733 734 /* 735 * Do the machine-dependent portion of autoconfiguration. This 736 * sets the configuration machinery here in motion by "finding" 737 * the root bus. When this function returns, we expect interrupts 738 * to be enabled. 739 */ 740 cpu_configure(); 741 } 742 743 static void 744 configure2(void) 745 { 746 CPU_INFO_ITERATOR cii; 747 struct cpu_info *ci; 748 int s; 749 750 /* 751 * Now that we've found all the hardware, start the real time 752 * and statistics clocks. 753 */ 754 initclocks(); 755 756 cold = 0; /* clocks are running, we're warm now! */ 757 s = splsched(); 758 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 759 splx(s); 760 761 /* Boot the secondary processors. */ 762 for (CPU_INFO_FOREACH(cii, ci)) { 763 uvm_cpu_attach(ci); 764 } 765 mp_online = true; 766 #if defined(MULTIPROCESSOR) 767 cpu_boot_secondary_processors(); 768 #endif 769 770 /* Setup the runqueues and scheduler. */ 771 runq_init(); 772 synch_init(); 773 774 /* 775 * Bus scans can make it appear as if the system has paused, so 776 * twiddle constantly while config_interrupts() jobs are running. 777 */ 778 config_twiddle_fn(NULL); 779 780 /* 781 * Create threads to call back and finish configuration for 782 * devices that want interrupts enabled. 783 */ 784 config_create_interruptthreads(); 785 786 /* Get the threads going and into any sleeps before continuing. */ 787 yield(); 788 } 789 790 static void 791 configure3(void) 792 { 793 794 /* 795 * Create threads to call back and finish configuration for 796 * devices that want the mounted root file system. 797 */ 798 config_create_mountrootthreads(); 799 800 /* Get the threads going and into any sleeps before continuing. */ 801 yield(); 802 } 803 804 static void 805 check_console(struct lwp *l) 806 { 807 struct vnode *vp; 808 int error; 809 810 error = namei_simple_kernel("/dev/console", 811 NSM_FOLLOW_NOEMULROOT, &vp); 812 if (error == 0) 813 vrele(vp); 814 else if (error == ENOENT) 815 printf("warning: no /dev/console\n"); 816 else 817 printf("warning: lookup /dev/console: error %d\n", error); 818 } 819 820 /* 821 * List of paths to try when searching for "init". 822 */ 823 static const char * const initpaths[] = { 824 "/sbin/init", 825 "/sbin/oinit", 826 "/sbin/init.bak", 827 NULL, 828 }; 829 830 /* 831 * Start the initial user process; try exec'ing each pathname in "initpaths". 832 * The program is invoked with one argument containing the boot flags. 833 */ 834 static void 835 start_init(void *arg) 836 { 837 struct lwp *l = arg; 838 struct proc *p = l->l_proc; 839 vaddr_t addr; 840 struct sys_execve_args /* { 841 syscallarg(const char *) path; 842 syscallarg(char * const *) argp; 843 syscallarg(char * const *) envp; 844 } */ args; 845 int options, i, error; 846 register_t retval[2]; 847 char flags[4], *flagsp; 848 const char *path, *slash; 849 char *ucp, **uap, *arg0, *arg1 = NULL; 850 char ipath[129]; 851 int ipx, len; 852 853 /* 854 * Now in process 1. 855 */ 856 strncpy(p->p_comm, "init", MAXCOMLEN); 857 858 /* 859 * Wait for main() to tell us that it's safe to exec. 860 */ 861 mutex_enter(proc_lock); 862 while (start_init_exec == 0) 863 cv_wait(&lbolt, proc_lock); 864 mutex_exit(proc_lock); 865 866 /* 867 * This is not the right way to do this. We really should 868 * hand-craft a descriptor onto /dev/console to hand to init, 869 * but that's a _lot_ more work, and the benefit from this easy 870 * hack makes up for the "good is the enemy of the best" effect. 871 */ 872 check_console(l); 873 874 /* 875 * Need just enough stack to hold the faked-up "execve()" arguments. 876 */ 877 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 878 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 879 NULL, UVM_UNKNOWN_OFFSET, 0, 880 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 881 UVM_ADV_NORMAL, 882 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 883 panic("init: couldn't allocate argument space"); 884 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 885 886 ipx = 0; 887 while (1) { 888 if (boothowto & RB_ASKNAME) { 889 printf("init path"); 890 if (initpaths[ipx]) 891 printf(" (default %s)", initpaths[ipx]); 892 printf(": "); 893 len = cngetsn(ipath, sizeof(ipath)-1); 894 if (len == 4 && strcmp(ipath, "halt") == 0) { 895 cpu_reboot(RB_HALT, NULL); 896 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 897 cpu_reboot(0, NULL); 898 #if defined(DDB) 899 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 900 console_debugger(); 901 continue; 902 #endif 903 } else if (len > 0 && ipath[0] == '/') { 904 ipath[len] = '\0'; 905 path = ipath; 906 } else if (len == 0 && initpaths[ipx] != NULL) { 907 path = initpaths[ipx++]; 908 } else { 909 printf("use absolute path, "); 910 #if defined(DDB) 911 printf("\"ddb\", "); 912 #endif 913 printf("\"halt\", or \"reboot\"\n"); 914 continue; 915 } 916 } else { 917 if ((path = initpaths[ipx++]) == NULL) { 918 ipx = 0; 919 boothowto |= RB_ASKNAME; 920 continue; 921 } 922 } 923 924 ucp = (char *)USRSTACK; 925 926 /* 927 * Construct the boot flag argument. 928 */ 929 flagsp = flags; 930 *flagsp++ = '-'; 931 options = 0; 932 933 if (boothowto & RB_SINGLE) { 934 *flagsp++ = 's'; 935 options = 1; 936 } 937 #ifdef notyet 938 if (boothowto & RB_FASTBOOT) { 939 *flagsp++ = 'f'; 940 options = 1; 941 } 942 #endif 943 944 /* 945 * Move out the flags (arg 1), if necessary. 946 */ 947 if (options != 0) { 948 *flagsp++ = '\0'; 949 i = flagsp - flags; 950 #ifdef DEBUG 951 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 952 #endif 953 arg1 = STACK_ALLOC(ucp, i); 954 ucp = STACK_MAX(arg1, i); 955 (void)copyout((void *)flags, arg1, i); 956 } 957 958 /* 959 * Move out the file name (also arg 0). 960 */ 961 i = strlen(path) + 1; 962 #ifdef DEBUG 963 aprint_normal("init: copying out path `%s' %d\n", path, i); 964 #else 965 if (boothowto & RB_ASKNAME || path != initpaths[0]) 966 printf("init: trying %s\n", path); 967 #endif 968 arg0 = STACK_ALLOC(ucp, i); 969 ucp = STACK_MAX(arg0, i); 970 (void)copyout(path, arg0, i); 971 972 /* 973 * Move out the arg pointers. 974 */ 975 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 976 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 977 SCARG(&args, path) = arg0; 978 SCARG(&args, argp) = uap; 979 SCARG(&args, envp) = NULL; 980 slash = strrchr(path, '/'); 981 if (slash) 982 (void)suword((void *)uap++, 983 (long)arg0 + (slash + 1 - path)); 984 else 985 (void)suword((void *)uap++, (long)arg0); 986 if (options != 0) 987 (void)suword((void *)uap++, (long)arg1); 988 (void)suword((void *)uap++, 0); /* terminator */ 989 990 /* 991 * Now try to exec the program. If can't for any reason 992 * other than it doesn't exist, complain. 993 */ 994 error = sys_execve(l, &args, retval); 995 if (error == 0 || error == EJUSTRETURN) { 996 KERNEL_UNLOCK_LAST(l); 997 return; 998 } 999 printf("exec %s: error %d\n", path, error); 1000 } 1001 printf("init: not found\n"); 1002 panic("no init"); 1003 } 1004 1005 /* 1006 * calculate cache size from physmem and vm_map size. 1007 */ 1008 vaddr_t 1009 calc_cache_size(struct vm_map *map, int pct, int va_pct) 1010 { 1011 paddr_t t; 1012 1013 /* XXX should consider competing cache if any */ 1014 /* XXX should consider submaps */ 1015 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1016 if (map != NULL) { 1017 vsize_t vsize; 1018 1019 vsize = vm_map_max(map) - vm_map_min(map); 1020 vsize = (uintmax_t)vsize * va_pct / 100; 1021 if (t > vsize) { 1022 t = vsize; 1023 } 1024 } 1025 return t; 1026 } 1027 1028 /* 1029 * Print the system start up banner. 1030 * 1031 * - Print a limited banner if AB_SILENT. 1032 * - Always send normal banner to the log. 1033 */ 1034 #define MEM_PBUFSIZE sizeof("99999 MB") 1035 1036 void 1037 banner(void) 1038 { 1039 static char notice[] = " Notice: this software is " 1040 "protected by copyright"; 1041 char pbuf[81]; 1042 void (*pr)(const char *, ...); 1043 int i; 1044 1045 if ((boothowto & AB_SILENT) != 0) { 1046 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1047 ostype, osrelease, kernel_ident); 1048 printf_nolog("%s", pbuf); 1049 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1050 printf(" "); 1051 printf_nolog("%s\n", notice); 1052 pr = aprint_normal; 1053 } else { 1054 pr = printf; 1055 } 1056 1057 memset(pbuf, 0, sizeof(pbuf)); 1058 (*pr)("%s%s", copyright, version); 1059 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1060 (*pr)("total memory = %s\n", pbuf); 1061 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1062 (*pr)("avail memory = %s\n", pbuf); 1063 } 1064