init_main.c revision 1.423
1 /* $NetBSD: init_main.c,v 1.423 2010/08/21 13:17:31 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 1.423 2010/08/21 13:17:31 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 kernconfig_lock_init(); 307 308 /* Initialize the device switch tables. */ 309 devsw_init(); 310 311 uvm_init(); 312 313 prop_kern_init(); 314 315 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 316 ksyms_init(); 317 #endif 318 kprintf_init(); 319 320 percpu_init(); 321 322 /* Initialize lock caches. */ 323 mutex_obj_init(); 324 rw_obj_init(); 325 326 /* Initialize the extent manager. */ 327 extent_init(); 328 329 /* Do machine-dependent initialization. */ 330 cpu_startup(); 331 332 /* Initialize the sysctl subsystem. */ 333 sysctl_init(); 334 335 /* Initialize callouts, part 1. */ 336 callout_startup(); 337 338 /* Initialize the kernel authorization subsystem. */ 339 kauth_init(); 340 341 spec_init(); 342 343 /* 344 * Set BPF op vector. Can't do this in bpf attach, since 345 * network drivers attach before bpf. 346 */ 347 bpf_setops(); 348 349 /* Start module system. */ 350 module_init(); 351 352 /* 353 * Initialize the kernel authorization subsystem and start the 354 * default security model, if any. We need to do this early 355 * enough so that subsystems relying on any of the aforementioned 356 * can work properly. Since the security model may dictate the 357 * credential inheritance policy, it is needed at least before 358 * any process is created, specifically proc0. 359 */ 360 module_init_class(MODULE_CLASS_SECMODEL); 361 362 /* Initialize the buffer cache */ 363 bufinit(); 364 365 /* Initialize sockets. */ 366 soinit(); 367 368 /* 369 * The following things must be done before autoconfiguration. 370 */ 371 evcnt_init(); /* initialize event counters */ 372 #if NRND > 0 373 rnd_init(); /* initialize random number generator */ 374 #endif 375 376 /* Initialize process and pgrp structures. */ 377 #ifdef KERN_SA 378 sa_init(); 379 #endif 380 procinit(); 381 lwpinit(); 382 383 /* Initialize signal-related data structures. */ 384 signal_init(); 385 386 /* Initialize resource management. */ 387 resource_init(); 388 389 /* Create process 0. */ 390 proc0_init(); 391 lwp0_init(); 392 393 /* Disable preemption during boot. */ 394 kpreempt_disable(); 395 396 /* Initialize the UID hash table. */ 397 uid_init(); 398 399 /* Charge root for one process. */ 400 (void)chgproccnt(0, 1); 401 402 /* Initialize timekeeping. */ 403 time_init(); 404 405 /* Initialize the run queues, turnstiles and sleep queues. */ 406 sched_rqinit(); 407 turnstile_init(); 408 sleeptab_init(&sleeptab); 409 410 sched_init(); 411 412 /* Initialize processor-sets */ 413 psets_init(); 414 415 /* MI initialization of the boot cpu */ 416 error = mi_cpu_attach(curcpu()); 417 KASSERT(error == 0); 418 419 /* Initialize timekeeping, part 2. */ 420 time_init2(); 421 422 /* 423 * Initialize mbuf's. Do this now because we might attempt to 424 * allocate mbufs or mbuf clusters during autoconfiguration. 425 */ 426 mbinit(); 427 428 /* Initialize I/O statistics. */ 429 iostat_init(); 430 431 /* Initialize the log device. */ 432 loginit(); 433 434 /* Second part of module system initialization. */ 435 module_start_unload_thread(); 436 437 /* Initialize the file systems. */ 438 #ifdef NVNODE_IMPLICIT 439 /* 440 * If maximum number of vnodes in namei vnode cache is not explicitly 441 * defined in kernel config, adjust the number such as we use roughly 442 * 10% of memory for vnodes and associated data structures in the 443 * assumed worst case. Do not provide fewer than NVNODE vnodes. 444 */ 445 usevnodes = 446 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 447 if (usevnodes > desiredvnodes) 448 desiredvnodes = usevnodes; 449 #endif 450 vfsinit(); 451 lf_init(); 452 453 /* Initialize fstrans. */ 454 fstrans_init(); 455 456 /* Initialize the file descriptor system. */ 457 fd_sys_init(); 458 459 /* Initialize cwd structures */ 460 cwd_sys_init(); 461 462 /* Initialize kqueue. */ 463 kqueue_init(); 464 465 /* Initialize the system monitor subsystems. */ 466 #if NSYSMON_TASKQ > 0 467 sysmon_task_queue_preinit(); 468 #endif 469 470 #if NSYSMON_ENVSYS > 0 471 sysmon_envsys_init(); 472 #endif 473 474 #if NSYSMON_POWER > 0 475 sysmon_power_init(); 476 #endif 477 478 #if NSYSMON_WDOG > 0 479 sysmon_wdog_init(); 480 #endif 481 482 inittimecounter(); 483 ntp_init(); 484 485 /* Initialize tty subsystem. */ 486 tty_init(); 487 ttyldisc_init(); 488 489 /* Initialize the buffer cache, part 2. */ 490 bufinit2(); 491 492 /* Initialize the disk wedge subsystem. */ 493 dkwedge_init(); 494 495 /* Initialize interfaces. */ 496 ifinit1(); 497 498 spldebug_start(); 499 500 /* Configure the system hardware. This will enable interrupts. */ 501 configure(); 502 503 ssp_init(); 504 505 configure2(); 506 /* Now timer is working. Enable preemption. */ 507 kpreempt_enable(); 508 509 ubc_init(); /* must be after autoconfig */ 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 /* 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. Then require force when loading any 600 * remaining un-init'ed built-in modules to avoid later surprises. 601 */ 602 module_init_class(MODULE_CLASS_ANY); 603 module_builtin_require_force(); 604 605 /* 606 * Finalize configuration now that all real devices have been 607 * found. This needs to be done before the root device is 608 * selected, since finalization may create the root device. 609 */ 610 config_finalize(); 611 612 sysctl_finalize(); 613 614 /* 615 * Now that autoconfiguration has completed, we can determine 616 * the root and dump devices. 617 */ 618 cpu_rootconf(); 619 cpu_dumpconf(); 620 621 /* Mount the root file system. */ 622 do { 623 domountroothook(root_device); 624 if ((error = vfs_mountroot())) { 625 printf("cannot mount root, error = %d\n", error); 626 boothowto |= RB_ASKNAME; 627 setroot(root_device, 628 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 629 } 630 } while (error != 0); 631 mountroothook_destroy(); 632 633 configure3(); 634 635 /* 636 * Initialise the time-of-day clock, passing the time recorded 637 * in the root filesystem (if any) for use by systems that 638 * don't have a non-volatile time-of-day device. 639 */ 640 inittodr(rootfstime); 641 642 /* 643 * Now can look at time, having had a chance to verify the time 644 * from the file system. Reset l->l_rtime as it may have been 645 * munched in mi_switch() after the time got set. 646 */ 647 getnanotime(&time); 648 boottime = time; 649 #ifdef COMPAT_50 650 { 651 struct timeval tv; 652 TIMESPEC_TO_TIMEVAL(&tv, &time); 653 timeval_to_timeval50(&tv, &boottime50); 654 } 655 #endif 656 mutex_enter(proc_lock); 657 LIST_FOREACH(p, &allproc, p_list) { 658 KASSERT((p->p_flag & PK_MARKER) == 0); 659 mutex_enter(p->p_lock); 660 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 661 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 662 lwp_lock(l); 663 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 664 lwp_unlock(l); 665 } 666 mutex_exit(p->p_lock); 667 } 668 mutex_exit(proc_lock); 669 binuptime(&curlwp->l_stime); 670 671 for (CPU_INFO_FOREACH(cii, ci)) { 672 ci->ci_schedstate.spc_lastmod = time_second; 673 } 674 675 /* Create the pageout daemon kernel thread. */ 676 uvm_swap_init(); 677 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 678 NULL, NULL, "pgdaemon")) 679 panic("fork pagedaemon"); 680 681 /* Create the filesystem syncer kernel thread. */ 682 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 683 NULL, NULL, "ioflush")) 684 panic("fork syncer"); 685 686 /* Create the aiodone daemon kernel thread. */ 687 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 688 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 689 panic("fork aiodoned"); 690 691 /* 692 * Okay, now we can let init(8) exec! It's off to userland! 693 */ 694 mutex_enter(proc_lock); 695 start_init_exec = 1; 696 cv_broadcast(&lbolt); 697 mutex_exit(proc_lock); 698 699 /* The scheduler is an infinite loop. */ 700 uvm_scheduler(); 701 /* NOTREACHED */ 702 } 703 704 /* 705 * Configure the system's hardware. 706 */ 707 static void 708 configure(void) 709 { 710 711 /* Initialize autoconf data structures. */ 712 config_init_mi(); 713 /* 714 * XXX 715 * callout_setfunc() requires mutex(9) so it can't be in config_init() 716 * on amiga and atari which use config_init() and autoconf(9) fucntions 717 * to initialize console devices. 718 */ 719 config_twiddle_init(); 720 721 pmf_init(); 722 #if NDRVCTL > 0 723 drvctl_init(); 724 #endif 725 726 #ifdef USERCONF 727 if (boothowto & RB_USERCONF) 728 user_config(); 729 #endif 730 731 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 732 printf_nolog("Detecting hardware..."); 733 } 734 735 /* 736 * Do the machine-dependent portion of autoconfiguration. This 737 * sets the configuration machinery here in motion by "finding" 738 * the root bus. When this function returns, we expect interrupts 739 * to be enabled. 740 */ 741 cpu_configure(); 742 } 743 744 static void 745 configure2(void) 746 { 747 CPU_INFO_ITERATOR cii; 748 struct cpu_info *ci; 749 int s; 750 751 /* 752 * Now that we've found all the hardware, start the real time 753 * and statistics clocks. 754 */ 755 initclocks(); 756 757 cold = 0; /* clocks are running, we're warm now! */ 758 s = splsched(); 759 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 760 splx(s); 761 762 /* Boot the secondary processors. */ 763 for (CPU_INFO_FOREACH(cii, ci)) { 764 uvm_cpu_attach(ci); 765 } 766 mp_online = true; 767 #if defined(MULTIPROCESSOR) 768 cpu_boot_secondary_processors(); 769 #endif 770 771 /* Setup the runqueues and scheduler. */ 772 runq_init(); 773 synch_init(); 774 775 /* 776 * Bus scans can make it appear as if the system has paused, so 777 * twiddle constantly while config_interrupts() jobs are running. 778 */ 779 config_twiddle_fn(NULL); 780 781 /* 782 * Create threads to call back and finish configuration for 783 * devices that want interrupts enabled. 784 */ 785 config_create_interruptthreads(); 786 787 /* Get the threads going and into any sleeps before continuing. */ 788 yield(); 789 } 790 791 static void 792 configure3(void) 793 { 794 795 /* 796 * Create threads to call back and finish configuration for 797 * devices that want the mounted root file system. 798 */ 799 config_create_mountrootthreads(); 800 801 /* Get the threads going and into any sleeps before continuing. */ 802 yield(); 803 } 804 805 static void 806 check_console(struct lwp *l) 807 { 808 struct vnode *vp; 809 int error; 810 811 error = namei_simple_kernel("/dev/console", 812 NSM_FOLLOW_NOEMULROOT, &vp); 813 if (error == 0) 814 vrele(vp); 815 else if (error == ENOENT) 816 printf("warning: no /dev/console\n"); 817 else 818 printf("warning: lookup /dev/console: error %d\n", error); 819 } 820 821 /* 822 * List of paths to try when searching for "init". 823 */ 824 static const char * const initpaths[] = { 825 "/sbin/init", 826 "/sbin/oinit", 827 "/sbin/init.bak", 828 NULL, 829 }; 830 831 /* 832 * Start the initial user process; try exec'ing each pathname in "initpaths". 833 * The program is invoked with one argument containing the boot flags. 834 */ 835 static void 836 start_init(void *arg) 837 { 838 struct lwp *l = arg; 839 struct proc *p = l->l_proc; 840 vaddr_t addr; 841 struct sys_execve_args /* { 842 syscallarg(const char *) path; 843 syscallarg(char * const *) argp; 844 syscallarg(char * const *) envp; 845 } */ args; 846 int options, i, error; 847 register_t retval[2]; 848 char flags[4], *flagsp; 849 const char *path, *slash; 850 char *ucp, **uap, *arg0, *arg1 = NULL; 851 char ipath[129]; 852 int ipx, len; 853 854 /* 855 * Now in process 1. 856 */ 857 strncpy(p->p_comm, "init", MAXCOMLEN); 858 859 /* 860 * Wait for main() to tell us that it's safe to exec. 861 */ 862 mutex_enter(proc_lock); 863 while (start_init_exec == 0) 864 cv_wait(&lbolt, proc_lock); 865 mutex_exit(proc_lock); 866 867 /* 868 * This is not the right way to do this. We really should 869 * hand-craft a descriptor onto /dev/console to hand to init, 870 * but that's a _lot_ more work, and the benefit from this easy 871 * hack makes up for the "good is the enemy of the best" effect. 872 */ 873 check_console(l); 874 875 /* 876 * Need just enough stack to hold the faked-up "execve()" arguments. 877 */ 878 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 879 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 880 NULL, UVM_UNKNOWN_OFFSET, 0, 881 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 882 UVM_ADV_NORMAL, 883 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 884 panic("init: couldn't allocate argument space"); 885 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 886 887 ipx = 0; 888 while (1) { 889 if (boothowto & RB_ASKNAME) { 890 printf("init path"); 891 if (initpaths[ipx]) 892 printf(" (default %s)", initpaths[ipx]); 893 printf(": "); 894 len = cngetsn(ipath, sizeof(ipath)-1); 895 if (len == 4 && strcmp(ipath, "halt") == 0) { 896 cpu_reboot(RB_HALT, NULL); 897 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 898 cpu_reboot(0, NULL); 899 #if defined(DDB) 900 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 901 console_debugger(); 902 continue; 903 #endif 904 } else if (len > 0 && ipath[0] == '/') { 905 ipath[len] = '\0'; 906 path = ipath; 907 } else if (len == 0 && initpaths[ipx] != NULL) { 908 path = initpaths[ipx++]; 909 } else { 910 printf("use absolute path, "); 911 #if defined(DDB) 912 printf("\"ddb\", "); 913 #endif 914 printf("\"halt\", or \"reboot\"\n"); 915 continue; 916 } 917 } else { 918 if ((path = initpaths[ipx++]) == NULL) { 919 ipx = 0; 920 boothowto |= RB_ASKNAME; 921 continue; 922 } 923 } 924 925 ucp = (char *)USRSTACK; 926 927 /* 928 * Construct the boot flag argument. 929 */ 930 flagsp = flags; 931 *flagsp++ = '-'; 932 options = 0; 933 934 if (boothowto & RB_SINGLE) { 935 *flagsp++ = 's'; 936 options = 1; 937 } 938 #ifdef notyet 939 if (boothowto & RB_FASTBOOT) { 940 *flagsp++ = 'f'; 941 options = 1; 942 } 943 #endif 944 945 /* 946 * Move out the flags (arg 1), if necessary. 947 */ 948 if (options != 0) { 949 *flagsp++ = '\0'; 950 i = flagsp - flags; 951 #ifdef DEBUG 952 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 953 #endif 954 arg1 = STACK_ALLOC(ucp, i); 955 ucp = STACK_MAX(arg1, i); 956 (void)copyout((void *)flags, arg1, i); 957 } 958 959 /* 960 * Move out the file name (also arg 0). 961 */ 962 i = strlen(path) + 1; 963 #ifdef DEBUG 964 aprint_normal("init: copying out path `%s' %d\n", path, i); 965 #else 966 if (boothowto & RB_ASKNAME || path != initpaths[0]) 967 printf("init: trying %s\n", path); 968 #endif 969 arg0 = STACK_ALLOC(ucp, i); 970 ucp = STACK_MAX(arg0, i); 971 (void)copyout(path, arg0, i); 972 973 /* 974 * Move out the arg pointers. 975 */ 976 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 977 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 978 SCARG(&args, path) = arg0; 979 SCARG(&args, argp) = uap; 980 SCARG(&args, envp) = NULL; 981 slash = strrchr(path, '/'); 982 if (slash) 983 (void)suword((void *)uap++, 984 (long)arg0 + (slash + 1 - path)); 985 else 986 (void)suword((void *)uap++, (long)arg0); 987 if (options != 0) 988 (void)suword((void *)uap++, (long)arg1); 989 (void)suword((void *)uap++, 0); /* terminator */ 990 991 /* 992 * Now try to exec the program. If can't for any reason 993 * other than it doesn't exist, complain. 994 */ 995 error = sys_execve(l, &args, retval); 996 if (error == 0 || error == EJUSTRETURN) { 997 KERNEL_UNLOCK_LAST(l); 998 return; 999 } 1000 printf("exec %s: error %d\n", path, error); 1001 } 1002 printf("init: not found\n"); 1003 panic("no init"); 1004 } 1005 1006 /* 1007 * calculate cache size from physmem and vm_map size. 1008 */ 1009 vaddr_t 1010 calc_cache_size(struct vm_map *map, int pct, int va_pct) 1011 { 1012 paddr_t t; 1013 1014 /* XXX should consider competing cache if any */ 1015 /* XXX should consider submaps */ 1016 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1017 if (map != NULL) { 1018 vsize_t vsize; 1019 1020 vsize = vm_map_max(map) - vm_map_min(map); 1021 vsize = (uintmax_t)vsize * va_pct / 100; 1022 if (t > vsize) { 1023 t = vsize; 1024 } 1025 } 1026 return t; 1027 } 1028 1029 /* 1030 * Print the system start up banner. 1031 * 1032 * - Print a limited banner if AB_SILENT. 1033 * - Always send normal banner to the log. 1034 */ 1035 #define MEM_PBUFSIZE sizeof("99999 MB") 1036 1037 void 1038 banner(void) 1039 { 1040 static char notice[] = " Notice: this software is " 1041 "protected by copyright"; 1042 char pbuf[81]; 1043 void (*pr)(const char *, ...); 1044 int i; 1045 1046 if ((boothowto & AB_SILENT) != 0) { 1047 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1048 ostype, osrelease, kernel_ident); 1049 printf_nolog("%s", pbuf); 1050 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1051 printf(" "); 1052 printf_nolog("%s\n", notice); 1053 pr = aprint_normal; 1054 } else { 1055 pr = printf; 1056 } 1057 1058 memset(pbuf, 0, sizeof(pbuf)); 1059 (*pr)("%s%s", copyright, version); 1060 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1061 (*pr)("total memory = %s\n", pbuf); 1062 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1063 (*pr)("avail memory = %s\n", pbuf); 1064 } 1065
Indexes created Sun Sep 21 20:09:37 GMT 2025