init_main.c revision 1.436
1 /* $NetBSD: init_main.c,v 1.436 2011/09/28 15:52:47 jruoho 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 1.436 2011/09/28 15:52:47 jruoho 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/cpufreq.h> 134 #include <sys/spldebug.h> 135 #include <sys/kernel.h> 136 #include <sys/mount.h> 137 #include <sys/proc.h> 138 #include <sys/kthread.h> 139 #include <sys/resourcevar.h> 140 #include <sys/signalvar.h> 141 #include <sys/systm.h> 142 #include <sys/vnode.h> 143 #include <sys/fstrans.h> 144 #include <sys/tty.h> 145 #include <sys/conf.h> 146 #include <sys/disklabel.h> 147 #include <sys/buf.h> 148 #include <sys/device.h> 149 #include <sys/exec.h> 150 #include <sys/socketvar.h> 151 #include <sys/protosw.h> 152 #include <sys/percpu.h> 153 #include <sys/pserialize.h> 154 #include <sys/pset.h> 155 #include <sys/sysctl.h> 156 #include <sys/reboot.h> 157 #include <sys/event.h> 158 #include <sys/mbuf.h> 159 #include <sys/sched.h> 160 #include <sys/sleepq.h> 161 #include <sys/iostat.h> 162 #include <sys/vmem.h> 163 #include <sys/uuid.h> 164 #include <sys/extent.h> 165 #include <sys/disk.h> 166 #include <sys/msgbuf.h> 167 #include <sys/module.h> 168 #include <sys/event.h> 169 #include <sys/lockf.h> 170 #include <sys/once.h> 171 #include <sys/kcpuset.h> 172 #include <sys/ksyms.h> 173 #include <sys/uidinfo.h> 174 #include <sys/kprintf.h> 175 #ifdef FAST_IPSEC 176 #include <netipsec/ipsec.h> 177 #endif 178 #ifdef SYSVSHM 179 #include <sys/shm.h> 180 #endif 181 #ifdef SYSVSEM 182 #include <sys/sem.h> 183 #endif 184 #ifdef SYSVMSG 185 #include <sys/msg.h> 186 #endif 187 #include <sys/domain.h> 188 #include <sys/namei.h> 189 #if NRND > 0 190 #include <sys/rnd.h> 191 #endif 192 #include <sys/pipe.h> 193 #if NVERIEXEC > 0 194 #include <sys/verified_exec.h> 195 #endif /* NVERIEXEC > 0 */ 196 #ifdef KTRACE 197 #include <sys/ktrace.h> 198 #endif 199 #include <sys/kauth.h> 200 #ifdef KERN_SA 201 #include <sys/savar.h> 202 #endif 203 #include <net80211/ieee80211_netbsd.h> 204 #ifdef PTRACE 205 #include <sys/ptrace.h> 206 #endif /* PTRACE */ 207 208 #include <sys/syscall.h> 209 #include <sys/syscallargs.h> 210 211 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 212 #include <sys/pax.h> 213 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 214 215 #include <ufs/ufs/quota.h> 216 217 #include <miscfs/genfs/genfs.h> 218 #include <miscfs/syncfs/syncfs.h> 219 #include <miscfs/specfs/specdev.h> 220 221 #include <sys/cpu.h> 222 223 #include <uvm/uvm.h> /* extern struct uvm uvm */ 224 225 #if NSYSMON_TASKQ > 0 226 #include <dev/sysmon/sysmon_taskq.h> 227 #endif 228 229 #include <dev/cons.h> 230 231 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 232 #include <dev/sysmon/sysmonvar.h> 233 #endif 234 235 #include <net/bpf.h> 236 #include <net/if.h> 237 #include <net/raw_cb.h> 238 239 #include <prop/proplib.h> 240 241 #ifdef COMPAT_50 242 #include <compat/sys/time.h> 243 struct timeval50 boottime50; 244 #endif 245 246 #include <sys/userconf.h> 247 248 extern struct lwp lwp0; 249 extern time_t rootfstime; 250 251 #ifndef curlwp 252 struct lwp *curlwp = &lwp0; 253 #endif 254 struct proc *initproc; 255 256 struct vnode *rootvp, *swapdev_vp; 257 int boothowto; 258 int cold = 1; /* still working on startup */ 259 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 260 261 int start_init_exec; /* semaphore for start_init() */ 262 263 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 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 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 spec_init(); 349 350 /* 351 * Set BPF op vector. Can't do this in bpf attach, since 352 * network drivers attach before bpf. 353 */ 354 bpf_setops(); 355 356 /* Start module system. */ 357 module_init(); 358 359 /* 360 * Initialize the kernel authorization subsystem and start the 361 * default security model, if any. We need to do this early 362 * enough so that subsystems relying on any of the aforementioned 363 * can work properly. Since the security model may dictate the 364 * credential inheritance policy, it is needed at least before 365 * any process is created, specifically proc0. 366 */ 367 module_init_class(MODULE_CLASS_SECMODEL); 368 369 /* Initialize the buffer cache */ 370 bufinit(); 371 372 /* Initialize sockets. */ 373 soinit(); 374 375 /* 376 * The following things must be done before autoconfiguration. 377 */ 378 #if NRND > 0 379 rnd_init(); /* initialize random number generator */ 380 #endif 381 382 /* Initialize process and pgrp structures. */ 383 #ifdef KERN_SA 384 sa_init(); 385 #endif 386 procinit(); 387 lwpinit(); 388 389 /* Initialize signal-related data structures. */ 390 signal_init(); 391 392 /* Initialize resource management. */ 393 resource_init(); 394 395 /* Create process 0. */ 396 proc0_init(); 397 lwp0_init(); 398 399 /* Disable preemption during boot. */ 400 kpreempt_disable(); 401 402 /* Initialize the UID hash table. */ 403 uid_init(); 404 405 /* Charge root for one process. */ 406 (void)chgproccnt(0, 1); 407 408 /* Initialize timekeeping. */ 409 time_init(); 410 411 /* Initialize the run queues, turnstiles and sleep queues. */ 412 sched_rqinit(); 413 turnstile_init(); 414 sleeptab_init(&sleeptab); 415 416 sched_init(); 417 418 /* Initialize processor-sets */ 419 psets_init(); 420 421 /* Initialize cpufreq(9) */ 422 cpufreq_init(); 423 424 /* MI initialization of the boot cpu */ 425 error = mi_cpu_attach(curcpu()); 426 KASSERT(error == 0); 427 428 /* Initialize timekeeping, part 2. */ 429 time_init2(); 430 431 /* 432 * Initialize mbuf's. Do this now because we might attempt to 433 * allocate mbufs or mbuf clusters during autoconfiguration. 434 */ 435 mbinit(); 436 437 /* Initialize I/O statistics. */ 438 iostat_init(); 439 440 /* Initialize the log device. */ 441 loginit(); 442 443 /* Second part of module system initialization. */ 444 module_start_unload_thread(); 445 446 /* Initialize the file systems. */ 447 #ifdef NVNODE_IMPLICIT 448 /* 449 * If maximum number of vnodes in namei vnode cache is not explicitly 450 * defined in kernel config, adjust the number such as we use roughly 451 * 10% of memory for vnodes and associated data structures in the 452 * assumed worst case. Do not provide fewer than NVNODE vnodes. 453 */ 454 usevnodes = 455 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 456 if (usevnodes > desiredvnodes) 457 desiredvnodes = usevnodes; 458 #endif 459 vfsinit(); 460 lf_init(); 461 462 /* Initialize fstrans. */ 463 fstrans_init(); 464 465 /* Initialize the file descriptor system. */ 466 fd_sys_init(); 467 468 /* Initialize cwd structures */ 469 cwd_sys_init(); 470 471 /* Initialize kqueue. */ 472 kqueue_init(); 473 474 /* Initialize the system monitor subsystems. */ 475 #if NSYSMON_TASKQ > 0 476 sysmon_task_queue_preinit(); 477 #endif 478 479 #if NSYSMON_ENVSYS > 0 480 sysmon_envsys_init(); 481 #endif 482 483 #if NSYSMON_POWER > 0 484 sysmon_power_init(); 485 #endif 486 487 #if NSYSMON_WDOG > 0 488 sysmon_wdog_init(); 489 #endif 490 491 inittimecounter(); 492 ntp_init(); 493 494 /* Initialize tty subsystem. */ 495 tty_init(); 496 ttyldisc_init(); 497 498 /* Initialize the buffer cache, part 2. */ 499 bufinit2(); 500 501 /* Initialize the disk wedge subsystem. */ 502 dkwedge_init(); 503 504 /* Initialize interfaces. */ 505 ifinit1(); 506 507 spldebug_start(); 508 509 /* Initialize sockets thread(s) */ 510 soinit1(); 511 512 513 /* Configure the system hardware. This will enable interrupts. */ 514 configure(); 515 516 ssp_init(); 517 518 ubc_init(); /* must be after autoconfig */ 519 520 mm_init(); 521 522 configure2(); 523 /* Now timer is working. Enable preemption. */ 524 kpreempt_enable(); 525 526 #ifdef SYSVSHM 527 /* Initialize System V style shared memory. */ 528 shminit(); 529 #endif 530 531 vmem_rehash_start(); /* must be before exec_init */ 532 533 /* Initialize exec structures */ 534 exec_init(1); /* seminit calls exithook_establish() */ 535 536 #ifdef SYSVSEM 537 /* Initialize System V style semaphores. */ 538 seminit(); 539 #endif 540 541 #ifdef SYSVMSG 542 /* Initialize System V style message queues. */ 543 msginit(); 544 #endif 545 546 #if NVERIEXEC > 0 547 /* 548 * Initialise the Veriexec subsystem. 549 */ 550 veriexec_init(); 551 #endif /* NVERIEXEC > 0 */ 552 553 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 554 pax_init(); 555 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 556 557 #ifdef FAST_IPSEC 558 /* Attach network crypto subsystem */ 559 ipsec_attach(); 560 #endif 561 562 /* 563 * Initialize protocols. Block reception of incoming packets 564 * until everything is ready. 565 */ 566 s = splnet(); 567 ifinit(); 568 domaininit(true); 569 if_attachdomain(); 570 splx(s); 571 572 #ifdef GPROF 573 /* Initialize kernel profiling. */ 574 kmstartup(); 575 #endif 576 577 /* Initialize system accounting. */ 578 acct_init(); 579 580 #ifndef PIPE_SOCKETPAIR 581 /* Initialize pipes. */ 582 pipe_init(); 583 #endif 584 585 #ifdef KTRACE 586 /* Initialize ktrace. */ 587 ktrinit(); 588 #endif 589 590 #ifdef PTRACE 591 /* Initialize ptrace. */ 592 ptrace_init(); 593 #endif /* PTRACE */ 594 595 /* Initialize the UUID system calls. */ 596 uuid_init(); 597 598 machdep_init(); 599 600 procinit_sysctl(); 601 602 /* 603 * Create process 1 (init(8)). We do this now, as Unix has 604 * historically had init be process 1, and changing this would 605 * probably upset a lot of people. 606 * 607 * Note that process 1 won't immediately exec init(8), but will 608 * wait for us to inform it that the root file system has been 609 * mounted. 610 */ 611 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 612 panic("fork init"); 613 614 /* 615 * Load any remaining builtin modules, and hand back temporary 616 * storage to the VM system. Then require force when loading any 617 * remaining un-init'ed built-in modules to avoid later surprises. 618 */ 619 module_init_class(MODULE_CLASS_ANY); 620 module_builtin_require_force(); 621 622 /* 623 * Finalize configuration now that all real devices have been 624 * found. This needs to be done before the root device is 625 * selected, since finalization may create the root device. 626 */ 627 config_finalize(); 628 629 sysctl_finalize(); 630 631 /* 632 * Now that autoconfiguration has completed, we can determine 633 * the root and dump devices. 634 */ 635 cpu_rootconf(); 636 cpu_dumpconf(); 637 638 /* Mount the root file system. */ 639 do { 640 domountroothook(root_device); 641 if ((error = vfs_mountroot())) { 642 printf("cannot mount root, error = %d\n", error); 643 boothowto |= RB_ASKNAME; 644 setroot(root_device, 645 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 646 } 647 } while (error != 0); 648 mountroothook_destroy(); 649 650 configure3(); 651 652 /* 653 * Initialise the time-of-day clock, passing the time recorded 654 * in the root filesystem (if any) for use by systems that 655 * don't have a non-volatile time-of-day device. 656 */ 657 inittodr(rootfstime); 658 659 /* 660 * Now can look at time, having had a chance to verify the time 661 * from the file system. Reset l->l_rtime as it may have been 662 * munched in mi_switch() after the time got set. 663 */ 664 getnanotime(&time); 665 boottime = time; 666 #ifdef COMPAT_50 667 { 668 struct timeval tv; 669 TIMESPEC_TO_TIMEVAL(&tv, &time); 670 timeval_to_timeval50(&tv, &boottime50); 671 } 672 #endif 673 mutex_enter(proc_lock); 674 LIST_FOREACH(p, &allproc, p_list) { 675 KASSERT((p->p_flag & PK_MARKER) == 0); 676 mutex_enter(p->p_lock); 677 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 678 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 679 lwp_lock(l); 680 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 681 lwp_unlock(l); 682 } 683 mutex_exit(p->p_lock); 684 } 685 mutex_exit(proc_lock); 686 binuptime(&curlwp->l_stime); 687 688 for (CPU_INFO_FOREACH(cii, ci)) { 689 ci->ci_schedstate.spc_lastmod = time_second; 690 } 691 692 /* Create the pageout daemon kernel thread. */ 693 uvm_swap_init(); 694 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 695 NULL, NULL, "pgdaemon")) 696 panic("fork pagedaemon"); 697 698 /* Create the filesystem syncer kernel thread. */ 699 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 700 NULL, NULL, "ioflush")) 701 panic("fork syncer"); 702 703 /* Create the aiodone daemon kernel thread. */ 704 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 705 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 706 panic("fork aiodoned"); 707 708 /* 709 * Okay, now we can let init(8) exec! It's off to userland! 710 */ 711 mutex_enter(proc_lock); 712 start_init_exec = 1; 713 cv_broadcast(&lbolt); 714 mutex_exit(proc_lock); 715 716 /* The scheduler is an infinite loop. */ 717 uvm_scheduler(); 718 /* NOTREACHED */ 719 } 720 721 /* 722 * Configure the system's hardware. 723 */ 724 static void 725 configure(void) 726 { 727 728 /* Initialize autoconf data structures. */ 729 config_init_mi(); 730 /* 731 * XXX 732 * callout_setfunc() requires mutex(9) so it can't be in config_init() 733 * on amiga and atari which use config_init() and autoconf(9) fucntions 734 * to initialize console devices. 735 */ 736 config_twiddle_init(); 737 738 pmf_init(); 739 #if NDRVCTL > 0 740 drvctl_init(); 741 #endif 742 743 userconf_init(); 744 if (boothowto & RB_USERCONF) 745 userconf_prompt(); 746 747 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 748 printf_nolog("Detecting hardware..."); 749 } 750 751 /* 752 * Do the machine-dependent portion of autoconfiguration. This 753 * sets the configuration machinery here in motion by "finding" 754 * the root bus. When this function returns, we expect interrupts 755 * to be enabled. 756 */ 757 cpu_configure(); 758 } 759 760 static void 761 configure2(void) 762 { 763 CPU_INFO_ITERATOR cii; 764 struct cpu_info *ci; 765 int s; 766 767 /* 768 * Now that we've found all the hardware, start the real time 769 * and statistics clocks. 770 */ 771 initclocks(); 772 773 cold = 0; /* clocks are running, we're warm now! */ 774 s = splsched(); 775 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 776 splx(s); 777 778 /* Boot the secondary processors. */ 779 for (CPU_INFO_FOREACH(cii, ci)) { 780 uvm_cpu_attach(ci); 781 } 782 mp_online = true; 783 #if defined(MULTIPROCESSOR) 784 cpu_boot_secondary_processors(); 785 #endif 786 787 /* Setup the runqueues and scheduler. */ 788 runq_init(); 789 synch_init(); 790 791 /* 792 * Bus scans can make it appear as if the system has paused, so 793 * twiddle constantly while config_interrupts() jobs are running. 794 */ 795 config_twiddle_fn(NULL); 796 797 /* 798 * Create threads to call back and finish configuration for 799 * devices that want interrupts enabled. 800 */ 801 config_create_interruptthreads(); 802 803 /* Get the threads going and into any sleeps before continuing. */ 804 yield(); 805 } 806 807 static void 808 configure3(void) 809 { 810 811 /* 812 * Create threads to call back and finish configuration for 813 * devices that want the mounted root file system. 814 */ 815 config_create_mountrootthreads(); 816 817 /* Get the threads going and into any sleeps before continuing. */ 818 yield(); 819 } 820 821 static void 822 check_console(struct lwp *l) 823 { 824 struct vnode *vp; 825 int error; 826 827 error = namei_simple_kernel("/dev/console", 828 NSM_FOLLOW_NOEMULROOT, &vp); 829 if (error == 0) 830 vrele(vp); 831 else if (error == ENOENT) 832 printf("warning: no /dev/console\n"); 833 else 834 printf("warning: lookup /dev/console: error %d\n", error); 835 } 836 837 /* 838 * List of paths to try when searching for "init". 839 */ 840 static const char * const initpaths[] = { 841 "/sbin/init", 842 "/sbin/oinit", 843 "/sbin/init.bak", 844 NULL, 845 }; 846 847 /* 848 * Start the initial user process; try exec'ing each pathname in "initpaths". 849 * The program is invoked with one argument containing the boot flags. 850 */ 851 static void 852 start_init(void *arg) 853 { 854 struct lwp *l = arg; 855 struct proc *p = l->l_proc; 856 vaddr_t addr; 857 struct sys_execve_args /* { 858 syscallarg(const char *) path; 859 syscallarg(char * const *) argp; 860 syscallarg(char * const *) envp; 861 } */ args; 862 int options, i, error; 863 register_t retval[2]; 864 char flags[4], *flagsp; 865 const char *path, *slash; 866 char *ucp, **uap, *arg0, *arg1 = NULL; 867 char ipath[129]; 868 int ipx, len; 869 870 /* 871 * Now in process 1. 872 */ 873 strncpy(p->p_comm, "init", MAXCOMLEN); 874 875 /* 876 * Wait for main() to tell us that it's safe to exec. 877 */ 878 mutex_enter(proc_lock); 879 while (start_init_exec == 0) 880 cv_wait(&lbolt, proc_lock); 881 mutex_exit(proc_lock); 882 883 /* 884 * This is not the right way to do this. We really should 885 * hand-craft a descriptor onto /dev/console to hand to init, 886 * but that's a _lot_ more work, and the benefit from this easy 887 * hack makes up for the "good is the enemy of the best" effect. 888 */ 889 check_console(l); 890 891 /* 892 * Need just enough stack to hold the faked-up "execve()" arguments. 893 */ 894 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 895 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 896 NULL, UVM_UNKNOWN_OFFSET, 0, 897 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 898 UVM_ADV_NORMAL, 899 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 900 panic("init: couldn't allocate argument space"); 901 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 902 903 ipx = 0; 904 while (1) { 905 if (boothowto & RB_ASKNAME) { 906 printf("init path"); 907 if (initpaths[ipx]) 908 printf(" (default %s)", initpaths[ipx]); 909 printf(": "); 910 len = cngetsn(ipath, sizeof(ipath)-1); 911 if (len == 4 && strcmp(ipath, "halt") == 0) { 912 cpu_reboot(RB_HALT, NULL); 913 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 914 cpu_reboot(0, NULL); 915 #if defined(DDB) 916 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 917 console_debugger(); 918 continue; 919 #endif 920 } else if (len > 0 && ipath[0] == '/') { 921 ipath[len] = '\0'; 922 path = ipath; 923 } else if (len == 0 && initpaths[ipx] != NULL) { 924 path = initpaths[ipx++]; 925 } else { 926 printf("use absolute path, "); 927 #if defined(DDB) 928 printf("\"ddb\", "); 929 #endif 930 printf("\"halt\", or \"reboot\"\n"); 931 continue; 932 } 933 } else { 934 if ((path = initpaths[ipx++]) == NULL) { 935 ipx = 0; 936 boothowto |= RB_ASKNAME; 937 continue; 938 } 939 } 940 941 ucp = (char *)USRSTACK; 942 943 /* 944 * Construct the boot flag argument. 945 */ 946 flagsp = flags; 947 *flagsp++ = '-'; 948 options = 0; 949 950 if (boothowto & RB_SINGLE) { 951 *flagsp++ = 's'; 952 options = 1; 953 } 954 #ifdef notyet 955 if (boothowto & RB_FASTBOOT) { 956 *flagsp++ = 'f'; 957 options = 1; 958 } 959 #endif 960 961 /* 962 * Move out the flags (arg 1), if necessary. 963 */ 964 if (options != 0) { 965 *flagsp++ = '\0'; 966 i = flagsp - flags; 967 #ifdef DEBUG 968 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 969 #endif 970 arg1 = STACK_ALLOC(ucp, i); 971 ucp = STACK_MAX(arg1, i); 972 (void)copyout((void *)flags, arg1, i); 973 } 974 975 /* 976 * Move out the file name (also arg 0). 977 */ 978 i = strlen(path) + 1; 979 #ifdef DEBUG 980 aprint_normal("init: copying out path `%s' %d\n", path, i); 981 #else 982 if (boothowto & RB_ASKNAME || path != initpaths[0]) 983 printf("init: trying %s\n", path); 984 #endif 985 arg0 = STACK_ALLOC(ucp, i); 986 ucp = STACK_MAX(arg0, i); 987 (void)copyout(path, arg0, i); 988 989 /* 990 * Move out the arg pointers. 991 */ 992 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 993 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 994 SCARG(&args, path) = arg0; 995 SCARG(&args, argp) = uap; 996 SCARG(&args, envp) = NULL; 997 slash = strrchr(path, '/'); 998 if (slash) 999 (void)suword((void *)uap++, 1000 (long)arg0 + (slash + 1 - path)); 1001 else 1002 (void)suword((void *)uap++, (long)arg0); 1003 if (options != 0) 1004 (void)suword((void *)uap++, (long)arg1); 1005 (void)suword((void *)uap++, 0); /* terminator */ 1006 1007 /* 1008 * Now try to exec the program. If can't for any reason 1009 * other than it doesn't exist, complain. 1010 */ 1011 error = sys_execve(l, &args, retval); 1012 if (error == 0 || error == EJUSTRETURN) { 1013 KERNEL_UNLOCK_LAST(l); 1014 return; 1015 } 1016 printf("exec %s: error %d\n", path, error); 1017 } 1018 printf("init: not found\n"); 1019 panic("no init"); 1020 } 1021 1022 /* 1023 * calculate cache size (in bytes) from physmem and vm_map size. 1024 */ 1025 vaddr_t 1026 calc_cache_size(struct vm_map *map, int pct, int va_pct) 1027 { 1028 paddr_t t; 1029 1030 /* XXX should consider competing cache if any */ 1031 /* XXX should consider submaps */ 1032 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1033 if (map != NULL) { 1034 vsize_t vsize; 1035 1036 vsize = vm_map_max(map) - vm_map_min(map); 1037 vsize = (uintmax_t)vsize * va_pct / 100; 1038 if (t > vsize) { 1039 t = vsize; 1040 } 1041 } 1042 return t; 1043 } 1044 1045 /* 1046 * Print the system start up banner. 1047 * 1048 * - Print a limited banner if AB_SILENT. 1049 * - Always send normal banner to the log. 1050 */ 1051 #define MEM_PBUFSIZE sizeof("99999 MB") 1052 1053 void 1054 banner(void) 1055 { 1056 static char notice[] = " Notice: this software is " 1057 "protected by copyright"; 1058 char pbuf[81]; 1059 void (*pr)(const char *, ...); 1060 int i; 1061 1062 if ((boothowto & AB_SILENT) != 0) { 1063 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1064 ostype, osrelease, kernel_ident); 1065 printf_nolog("%s", pbuf); 1066 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1067 printf(" "); 1068 printf_nolog("%s\n", notice); 1069 pr = aprint_normal; 1070 } else { 1071 pr = printf; 1072 } 1073 1074 memset(pbuf, 0, sizeof(pbuf)); 1075 (*pr)("%s%s", copyright, version); 1076 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1077 (*pr)("total memory = %s\n", pbuf); 1078 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1079 (*pr)("avail memory = %s\n", pbuf); 1080 } 1081
Indexes created Sun Sep 21 20:09:37 GMT 2025