init_main.c revision 1.552
1 /* $NetBSD: init_main.c,v 1.552 2025/05/08 05:31:16 imil Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009, 2019, 2023 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 1.552 2025/05/08 05:31:16 imil Exp $"); 101 102 #include "opt_cnmagic.h" 103 #include "opt_ddb.h" 104 #include "opt_inet.h" 105 #include "opt_ipsec.h" 106 #include "opt_modular.h" 107 #include "opt_ntp.h" 108 #include "opt_pipe.h" 109 #include "opt_syscall_debug.h" 110 #include "opt_sysv.h" 111 #include "opt_fileassoc.h" 112 #include "opt_ktrace.h" 113 #include "opt_pax.h" 114 #include "opt_compat_netbsd.h" 115 #include "opt_ptrace.h" 116 #include "opt_splash.h" 117 #include "opt_kernhist.h" 118 #include "opt_gprof.h" 119 120 #if defined(SPLASHSCREEN) && defined(makeoptions_SPLASHSCREEN_IMAGE) 121 extern void *_binary_splash_image_start; 122 extern void *_binary_splash_image_end; 123 #endif 124 125 #include "ksyms.h" 126 127 #include "veriexec.h" 128 129 #include <sys/param.h> 130 #include <sys/acct.h> 131 #include <sys/filedesc.h> 132 #include <sys/file.h> 133 #include <sys/errno.h> 134 #include <sys/callout.h> 135 #include <sys/cpu.h> 136 #include <sys/cpufreq.h> 137 #include <sys/spldebug.h> 138 #include <sys/kernel.h> 139 #include <sys/mount.h> 140 #include <sys/proc.h> 141 #include <sys/lwp.h> 142 #include <sys/kthread.h> 143 #include <sys/resourcevar.h> 144 #include <sys/signalvar.h> 145 #include <sys/systm.h> 146 #include <sys/vnode.h> 147 #include <sys/fstrans.h> 148 #include <sys/tty.h> 149 #include <sys/conf.h> 150 #include <sys/disklabel.h> 151 #include <sys/buf.h> 152 #include <sys/device.h> 153 #include <sys/exec.h> 154 #include <sys/socketvar.h> 155 #include <sys/protosw.h> 156 #include <sys/percpu.h> 157 #include <sys/pserialize.h> 158 #include <sys/pset.h> 159 #include <sys/sysctl.h> 160 #include <sys/reboot.h> 161 #include <sys/event.h> 162 #include <sys/mbuf.h> 163 #include <sys/sched.h> 164 #include <sys/sleepq.h> 165 #include <sys/ipi.h> 166 #include <sys/iostat.h> 167 #include <sys/vmem.h> 168 #include <sys/uuid.h> 169 #include <sys/extent.h> 170 #include <sys/disk.h> 171 #include <sys/msgbuf.h> 172 #include <sys/module.h> 173 #include <sys/module_hook.h> 174 #include <sys/event.h> 175 #include <sys/lockf.h> 176 #include <sys/once.h> 177 #include <sys/kcpuset.h> 178 #include <sys/ksyms.h> 179 #include <sys/uidinfo.h> 180 #include <sys/kprintf.h> 181 #include <sys/bufq.h> 182 #include <sys/threadpool.h> 183 #include <sys/futex.h> 184 #ifdef IPSEC 185 #include <netipsec/ipsec.h> 186 #endif 187 #include <sys/domain.h> 188 #include <sys/namei.h> 189 #include <sys/rnd.h> 190 #include <sys/pipe.h> 191 #if NVERIEXEC > 0 192 #include <sys/verified_exec.h> 193 #endif /* NVERIEXEC > 0 */ 194 #ifdef KTRACE 195 #include <sys/ktrace.h> 196 #endif 197 #include <sys/kauth.h> 198 #include <net80211/ieee80211_netbsd.h> 199 #include <sys/cprng.h> 200 #include <sys/psref.h> 201 #include <sys/radixtree.h> 202 #include <sys/heartbeat.h> 203 204 #include <sys/syscall.h> 205 #include <sys/syscallargs.h> 206 207 #include <sys/pax.h> 208 209 #include <dev/clock_subr.h> 210 211 #include <secmodel/secmodel.h> 212 213 #include <ufs/ufs/quota.h> 214 215 #include <miscfs/genfs/genfs.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 #include <dev/cons.h> 223 #include <dev/splash/splash.h> 224 225 #include <net/bpf.h> 226 #include <net/if.h> 227 #include <net/pfil.h> 228 #include <net/raw_cb.h> 229 #include <net/if_llatbl.h> 230 231 #include <prop/proplib.h> 232 233 #include <sys/userconf.h> 234 235 #ifdef BOOT_DURATION 236 #include <sys/boot_duration.h> 237 #endif 238 239 extern time_t rootfstime; 240 241 #ifndef curlwp 242 struct lwp *curlwp = &lwp0; 243 #endif 244 struct proc *initproc; 245 246 struct vnode *rootvp, *swapdev_vp; 247 int boothowto; 248 int cold __read_mostly = 1; /* still working on startup */ 249 int shutting_down __read_mostly; /* system is shutting down */ 250 251 int start_init_exec; /* semaphore for start_init() */ 252 253 static void check_console(struct lwp *l); 254 static void start_init(void *); 255 static void configure(void); 256 static void configure2(void); 257 static void configure3(void); 258 void main(void); 259 260 /* 261 * System startup; initialize the world, create process 0, mount root 262 * filesystem, and fork to create init and pagedaemon. Most of the 263 * hard work is done in the lower-level initialization routines including 264 * startup(), which does memory initialization and autoconfiguration. 265 */ 266 void 267 main(void) 268 { 269 struct timespec time; 270 struct lwp *l; 271 struct proc *p; 272 int s, error; 273 #ifdef NVNODE_IMPLICIT 274 int usevnodes; 275 #endif 276 CPU_INFO_ITERATOR cii; 277 struct cpu_info *ci; 278 279 #ifdef DIAGNOSTIC 280 /* 281 * Verify that CPU_INFO_FOREACH() knows about the boot CPU 282 * and only the boot CPU at this point. 283 */ 284 int cpucount = 0; 285 for (CPU_INFO_FOREACH(cii, ci)) { 286 KASSERT(ci == curcpu()); 287 cpucount++; 288 } 289 KASSERT(cpucount == 1); 290 #endif 291 292 l = &lwp0; 293 #ifndef LWP0_CPU_INFO 294 l->l_cpu = curcpu(); 295 #endif 296 l->l_pflag |= LP_RUNNING; 297 298 /* 299 * Attempt to find console and initialize 300 * in case of early panic or other messages. 301 */ 302 consinit(); 303 #ifdef CNMAGIC 304 cn_set_magic(CNMAGIC); 305 #endif 306 307 kernel_lock_init(); 308 once_init(); 309 todr_init(); 310 311 mi_cpu_init(); 312 kernconfig_lock_init(); 313 kthread_sysinit(); 314 315 /* Initialize the device switch tables. */ 316 devsw_init(); 317 318 /* Initialize event counters. */ 319 evcnt_init(); 320 321 uvm_init(); 322 ubchist_init(); 323 kcpuset_sysinit(); 324 325 prop_kern_init(); 326 327 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 328 ksyms_init(); 329 #endif 330 kprintf_init(); 331 332 percpu_init(); 333 334 /* Initialize radix trees (used by numerous subsystems). */ 335 radix_tree_init(); 336 337 /* Passive serialization. */ 338 pserialize_init(); 339 340 /* Initialize the extent manager. */ 341 extent_init(); 342 343 /* Do machine-dependent initialization. */ 344 cpu_startup(); 345 346 /* Initialize the sysctl subsystem. */ 347 sysctl_init(); 348 349 /* Initialize callouts, part 1. */ 350 callout_startup(); 351 352 /* Initialize the kernel authorization subsystem. */ 353 kauth_init(); 354 355 secmodel_init(); 356 357 spec_init(); 358 359 /* 360 * Set BPF op vector. Can't do this in bpf attach, since 361 * network drivers attach before bpf. 362 */ 363 bpf_setops(); 364 365 /* Initialize what we can in ipi(9) before CPUs are detected. */ 366 ipi_sysinit(); 367 368 /* Start module system. */ 369 module_init(); 370 module_hook_init(); 371 372 /* 373 * Initialize the kernel authorization subsystem and start the 374 * default security model, if any. We need to do this early 375 * enough so that subsystems relying on any of the aforementioned 376 * can work properly. Since the security model may dictate the 377 * credential inheritance policy, it is needed at least before 378 * any process is created, specifically proc0. 379 */ 380 module_init_class(MODULE_CLASS_SECMODEL); 381 382 /* Initialize the buffer cache */ 383 bufinit(); 384 biohist_init(); 385 386 #ifdef KERNHIST 387 sysctl_kernhist_init(); 388 #endif 389 390 391 #if defined(SPLASHSCREEN) && defined(makeoptions_SPLASHSCREEN_IMAGE) 392 size_t splash_size = (&_binary_splash_image_end - 393 &_binary_splash_image_start) * sizeof(void *); 394 splash_setimage(&_binary_splash_image_start, splash_size); 395 #endif 396 397 /* Initialize sockets. */ 398 soinit(); 399 400 /* 401 * The following things must be done before autoconfiguration. 402 */ 403 rnd_init(); /* initialize entropy pool */ 404 405 cprng_init(); /* initialize cryptographic PRNG */ 406 407 /* Initialize process and pgrp structures. */ 408 procinit(); 409 lwpinit(); 410 411 /* Must be called after lwpinit (lwpinit_specificdata) */ 412 psref_init(); 413 414 /* Initialize exec structures */ 415 exec_init(1); /* signal_init calls exechook_establish() */ 416 417 /* Initialize signal-related data structures. */ 418 signal_init(); 419 420 /* Initialize resource management. */ 421 resource_init(); 422 423 /* Create process 0. */ 424 proc0_init(); 425 lwp0_init(); 426 427 /* Disable preemption during boot. */ 428 kpreempt_disable(); 429 430 /* Initialize the threadpool system. */ 431 threadpools_init(); 432 433 /* Initialize the UID hash table. */ 434 uid_init(); 435 436 /* Charge root for one process. */ 437 (void)chgproccnt(0, 1); 438 439 /* Initialize the run queues, turnstiles and sleep queues. */ 440 sched_rqinit(); 441 turnstile_init(); 442 sleeptab_init(&sleeptab); 443 444 sched_init(); 445 446 /* Initialize processor-sets */ 447 psets_init(); 448 449 /* Initialize cpufreq(9) */ 450 cpufreq_init(); 451 452 /* MI initialization of the boot cpu */ 453 error = mi_cpu_attach(curcpu()); 454 KASSERT(error == 0); 455 456 /* Initialize timekeeping. */ 457 time_init(); 458 459 /* 460 * Initialize mbuf's. Do this now because we might attempt to 461 * allocate mbufs or mbuf clusters during autoconfiguration. 462 */ 463 mbinit(); 464 465 /* Initialize I/O statistics. */ 466 iostat_init(); 467 468 /* Initialize the log device. */ 469 loginit(); 470 471 /* Second part of module system initialization. */ 472 module_start_unload_thread(); 473 474 /* Initialize autoconf data structures before any modules are loaded */ 475 config_init_mi(); 476 477 /* Initialize the file systems. */ 478 #ifdef NVNODE_IMPLICIT 479 /* 480 * If maximum number of vnodes in namei vnode cache is not explicitly 481 * defined in kernel config, adjust the number such as we use roughly 482 * 10% of memory for vnodes and associated data structures in the 483 * assumed worst case. Do not provide fewer than NVNODE vnodes. 484 */ 485 usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 486 10, VNODE_KMEM_MAXPCT) / VNODE_COST; 487 if (usevnodes > desiredvnodes) 488 desiredvnodes = usevnodes; 489 #endif /* NVNODE_IMPLICIT */ 490 #ifdef MAXFILES_IMPLICIT 491 /* 492 * If maximum number of files is not explicitly defined in 493 * kernel config, adjust the number so that it is somewhat 494 * more reasonable on machines with larger memory sizes. 495 * Arbitrary numbers are 20,000 files for 16GB RAM or more 496 * and 10,000 files for 1GB RAM or more. 497 * 498 * XXXtodo: adjust this and other values totally dynamically 499 */ 500 if (ctob((uint64_t)physmem) >= 16ULL * 1024 * 1024 * 1024) 501 maxfiles = MAX(maxfiles, 20000); 502 if (ctob((uint64_t)physmem) >= 1024 * 1024 * 1024) 503 maxfiles = MAX(maxfiles, 10000); 504 #endif /* MAXFILES_IMPLICIT */ 505 506 /* Initialize fstrans. */ 507 fstrans_init(); 508 509 vfsinit(); 510 lf_init(); 511 512 /* Initialize the file descriptor system. */ 513 fd_sys_init(); 514 515 /* Initialize kqueue. */ 516 kqueue_init(); 517 518 inittimecounter(); 519 ntp_init(); 520 521 /* Initialize tty subsystem. */ 522 tty_init(); 523 ttyldisc_init(); 524 525 /* Initialize the buffer cache, part 2. */ 526 bufinit2(); 527 528 /* Initialize the disk wedge subsystem. */ 529 dkwedge_init(); 530 531 /* Initialize pfil */ 532 pfil_init(); 533 534 /* Initialize interfaces. */ 535 ifinit1(); 536 537 spldebug_start(); 538 539 /* Initialize sockets thread(s) */ 540 soinit1(); 541 542 /* 543 * Initialize the bufq strategy sub-system and any built-in 544 * strategy modules - they may be needed by some devices during 545 * auto-configuration 546 */ 547 bufq_init(); 548 module_init_class(MODULE_CLASS_BUFQ); 549 550 /* Configure the system hardware. This will enable interrupts. */ 551 configure(); 552 #ifdef __HAVE_LEGACY_INTRCNT 553 evcnt_attach_legacy_intrcnt(); 554 #endif 555 556 /* Enable deferred processing of RNG samples */ 557 rnd_init_softint(); 558 559 /* Once all CPUs are detected, initialize the per-CPU cprng_fast. */ 560 cprng_fast_init(); 561 562 /* 563 * Now that softints can be established, start monitoring 564 * system heartbeat on all CPUs. 565 */ 566 heartbeat_start(); 567 568 ssp_init(); 569 570 ubc_init(); /* must be after autoconfig */ 571 572 mm_init(); 573 574 configure2(); 575 576 /* Initialize the rest of ipi(9) after CPUs have been detected. */ 577 ipi_percpu_init(); 578 579 futex_sys_init(); 580 581 /* Now timer is working. Enable preemption. */ 582 kpreempt_enable(); 583 584 /* Get the threads going and into any sleeps before continuing. */ 585 yield(); 586 587 vmem_rehash_start(); /* must be before exec_init */ 588 589 #if NVERIEXEC > 0 590 /* 591 * Initialise the Veriexec subsystem. 592 */ 593 veriexec_init(); 594 #endif /* NVERIEXEC > 0 */ 595 596 pax_init(); 597 598 #ifdef IPSEC 599 /* Attach network crypto subsystem */ 600 ipsec_attach(); 601 #endif 602 603 /* 604 * Initialize protocols. Block reception of incoming packets 605 * until everything is ready. 606 */ 607 s = splnet(); 608 ifinit(); 609 #if defined(INET) || defined(INET6) 610 lltableinit(); 611 #endif 612 domaininit(true); 613 ifinit_post(); 614 if_attachdomain(); 615 splx(s); 616 617 #ifdef GPROF 618 /* Initialize kernel profiling. */ 619 kmstartup(); 620 #endif 621 622 /* Initialize system accounting. */ 623 acct_init(); 624 625 #ifndef PIPE_SOCKETPAIR 626 /* Initialize pipes. */ 627 pipe_init(); 628 #endif 629 630 #ifdef KTRACE 631 /* Initialize ktrace. */ 632 ktrinit(); 633 #endif 634 635 machdep_init(); 636 637 procinit_sysctl(); 638 639 scdebug_init(); 640 641 /* 642 * Create process 1 (init(8)). We do this now, as Unix has 643 * historically had init be process 1, and changing this would 644 * probably upset a lot of people. 645 * 646 * Note that process 1 won't immediately exec init(8), but will 647 * wait for us to inform it that the root file system has been 648 * mounted. 649 */ 650 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL)) 651 panic("fork init"); 652 653 /* 654 * The initproc variable cannot be initialized in start_init as there 655 * is a race between vfs_mountroot and start_init. 656 */ 657 mutex_enter(&proc_lock); 658 initproc = proc_find_raw(1); 659 mutex_exit(&proc_lock); 660 661 /* 662 * Load any remaining builtin modules, and hand back temporary 663 * storage to the VM system. Then require force when loading any 664 * remaining un-init'ed built-in modules to avoid later surprises. 665 */ 666 module_init_class(MODULE_CLASS_ANY); 667 module_builtin_require_force(); 668 669 /* 670 * Finalize configuration now that all real devices have been 671 * found. This needs to be done before the root device is 672 * selected, since finalization may create the root device. 673 */ 674 config_finalize(); 675 676 sysctl_finalize(); 677 678 /* 679 * Now that autoconfiguration has completed, we can determine 680 * the root and dump devices. 681 */ 682 cpu_rootconf(); 683 cpu_dumpconf(); 684 685 /* Mount the root file system. */ 686 do { 687 domountroothook(root_device); 688 if ((error = vfs_mountroot())) { 689 printf("cannot mount root, error = %d\n", error); 690 boothowto |= RB_ASKNAME; 691 setroot(root_device, 692 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 693 } 694 } while (error != 0); 695 mountroothook_destroy(); 696 697 configure3(); 698 699 /* 700 * Initialise the time-of-day clock, passing the time recorded 701 * in the root filesystem (if any) for use by systems that 702 * don't have a non-volatile time-of-day device. 703 */ 704 inittodr(rootfstime); 705 706 /* 707 * Now can look at time, having had a chance to verify the time 708 * from the file system. Reset l->l_rtime as it may have been 709 * munched in mi_switch() after the time got set. 710 */ 711 getnanotime(&time); 712 713 mutex_enter(&proc_lock); 714 LIST_FOREACH(p, &allproc, p_list) { 715 KASSERT((p->p_flag & PK_MARKER) == 0); 716 mutex_enter(p->p_lock); 717 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 718 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 719 lwp_lock(l); 720 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 721 lwp_unlock(l); 722 } 723 mutex_exit(p->p_lock); 724 } 725 mutex_exit(&proc_lock); 726 binuptime(&curlwp->l_stime); 727 728 for (CPU_INFO_FOREACH(cii, ci)) { 729 ci->ci_schedstate.spc_lastmod = time_second; 730 } 731 732 /* Create the pageout daemon kernel thread. */ 733 uvm_swap_init(); 734 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 735 NULL, NULL, "pgdaemon")) 736 panic("fork pagedaemon"); 737 738 /* Create the filesystem syncer kernel thread. */ 739 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 740 NULL, NULL, "ioflush")) 741 panic("fork syncer"); 742 743 /* Wait for final configure threads to complete. */ 744 config_finalize_mountroot(); 745 746 /* 747 * Okay, now we can let init(8) exec! It's off to userland! 748 */ 749 mutex_enter(&proc_lock); 750 start_init_exec = 1; 751 cv_broadcast(&lbolt); 752 mutex_exit(&proc_lock); 753 754 #ifdef BOOT_DURATION 755 printf_nolog("kernel boot time: %"PRIu64"ms\n", boot_duration_timer()); 756 #endif 757 /* The scheduler is an infinite loop. */ 758 uvm_scheduler(); 759 /* NOTREACHED */ 760 } 761 762 /* 763 * Configure the system's hardware. 764 */ 765 static void 766 configure(void) 767 { 768 769 /* 770 * XXX 771 * callout_setfunc() requires mutex(9) so it can't be in config_init() 772 * on amiga and atari which use config_init() and autoconf(9) functions 773 * to initialize console devices. 774 */ 775 config_twiddle_init(); 776 777 pmf_init(); 778 779 /* Initialize driver modules */ 780 module_init_class(MODULE_CLASS_DRIVER); 781 782 userconf_init(); 783 if (boothowto & RB_USERCONF) 784 userconf_prompt(); 785 786 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 787 printf_nolog("Detecting hardware..."); 788 } 789 790 /* 791 * Do the machine-dependent portion of autoconfiguration. This 792 * sets the configuration machinery here in motion by "finding" 793 * the root bus. When this function returns, we expect interrupts 794 * to be enabled. 795 */ 796 cpu_configure(); 797 } 798 799 static void 800 configure2(void) 801 { 802 CPU_INFO_ITERATOR cii; 803 struct cpu_info *ci; 804 int s; 805 806 /* Fix up CPU topology info, which has all been collected by now. */ 807 cpu_topology_init(); 808 809 /* 810 * Now that we've found all the hardware, start the real time 811 * and statistics clocks. 812 */ 813 initclocks(); 814 815 cold = 0; /* clocks are running, we're warm now! */ 816 s = splsched(); 817 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 818 splx(s); 819 820 /* Setup the runqueues and scheduler. */ 821 runq_init(); 822 synch_init(); 823 824 /* Boot the secondary processors. */ 825 for (CPU_INFO_FOREACH(cii, ci)) { 826 uvm_cpu_attach(ci); 827 } 828 829 /* Decide how to partition free memory. */ 830 uvm_page_rebucket(); 831 832 mp_online = true; 833 #if defined(MULTIPROCESSOR) 834 cpu_boot_secondary_processors(); 835 #endif 836 837 /* 838 * Bus scans can make it appear as if the system has paused, so 839 * twiddle constantly while config_interrupts() jobs are running. 840 */ 841 config_twiddle_fn(NULL); 842 843 /* 844 * Create threads to call back and finish configuration for 845 * devices that want interrupts enabled. 846 */ 847 config_create_interruptthreads(); 848 } 849 850 static void 851 configure3(void) 852 { 853 854 /* 855 * Create threads to call back and finish configuration for 856 * devices that want the mounted root file system. 857 */ 858 config_create_mountrootthreads(); 859 860 /* Get the threads going and into any sleeps before continuing. */ 861 yield(); 862 } 863 864 static void 865 rootconf_handle_wedges(void) 866 { 867 struct disklabel label; 868 struct partition *p; 869 struct vnode *vp; 870 daddr_t startblk; 871 uint64_t nblks; 872 device_t dev; 873 int error; 874 875 if (booted_nblks) { 876 /* 877 * bootloader passed geometry 878 */ 879 dev = booted_device; 880 startblk = booted_startblk; 881 nblks = booted_nblks; 882 883 /* 884 * keep booted_device and booted_partition 885 * in case the kernel doesn't identify a wedge 886 */ 887 } else { 888 /* 889 * bootloader passed partition number 890 * 891 * We cannot ask the partition device directly when it is 892 * covered by a wedge. Instead we look up the geometry in 893 * the disklabel. 894 */ 895 vp = opendisk(booted_device); 896 897 if (vp == NULL) 898 return; 899 900 VOP_UNLOCK(vp); 901 error = VOP_IOCTL(vp, DIOCGDINFO, &label, FREAD, NOCRED); 902 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 903 VOP_CLOSE(vp, FREAD, NOCRED); 904 vput(vp); 905 if (error) 906 return; 907 908 KASSERT(booted_partition >= 0 909 && booted_partition < MAXPARTITIONS); 910 911 p = &label.d_partitions[booted_partition]; 912 913 dev = booted_device; 914 startblk = p->p_offset; 915 nblks = p->p_size; 916 } 917 918 dev = dkwedge_find_partition(dev, startblk, nblks); 919 if (dev != NULL) { 920 booted_device = dev; 921 booted_partition = 0; 922 } 923 } 924 925 void 926 rootconf(void) 927 { 928 if (booted_device != NULL) 929 rootconf_handle_wedges(); 930 931 setroot(booted_device, booted_partition); 932 } 933 934 static void 935 check_console(struct lwp *l) 936 { 937 struct vnode *vp; 938 int error; 939 940 error = namei_simple_kernel("/dev/console", 941 NSM_FOLLOW_NOEMULROOT, &vp); 942 if (error == 0) { 943 vrele(vp); 944 } else if (error == ENOENT) { 945 if (boothowto & (AB_VERBOSE|AB_DEBUG)) 946 printf("warning: no /dev/console\n"); 947 } else { 948 printf("warning: lookup /dev/console: error %d\n", error); 949 } 950 } 951 952 /* 953 * List of paths to try when searching for "init". 954 */ 955 static const char * const initpaths[] = { 956 "/sbin/init", 957 "/sbin/oinit", 958 "/sbin/init.bak", 959 "/rescue/init", 960 NULL, 961 }; 962 963 /* 964 * Start the initial user process; try exec'ing each pathname in "initpaths". 965 * The program is invoked with one argument containing the boot flags. 966 */ 967 static void 968 start_init(void *arg) 969 { 970 struct lwp *l = arg; 971 struct proc *p = l->l_proc; 972 vaddr_t addr; 973 struct sys_execve_args /* { 974 syscallarg(const char *) path; 975 syscallarg(char * const *) argp; 976 syscallarg(char * const *) envp; 977 } */ args; 978 int options, i, error; 979 register_t retval[2]; 980 char flags[4], *flagsp; 981 const char *path, *slash; 982 char *ucp, **uap, *arg0, *arg1, *argv[3]; 983 char ipath[129]; 984 int ipx, len; 985 986 /* 987 * Now in process 1. 988 */ 989 strncpy(p->p_comm, "init", MAXCOMLEN); 990 991 /* 992 * Wait for main() to tell us that it's safe to exec. 993 */ 994 mutex_enter(&proc_lock); 995 while (start_init_exec == 0) 996 cv_wait(&lbolt, &proc_lock); 997 mutex_exit(&proc_lock); 998 999 /* 1000 * This is not the right way to do this. We really should 1001 * hand-craft a descriptor onto /dev/console to hand to init, 1002 * but that's a _lot_ more work, and the benefit from this easy 1003 * hack makes up for the "good is the enemy of the best" effect. 1004 */ 1005 check_console(l); 1006 1007 /* 1008 * Need just enough stack to hold the faked-up "execve()" arguments. 1009 */ 1010 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 1011 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 1012 NULL, UVM_UNKNOWN_OFFSET, 0, 1013 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_COPY, 1014 UVM_ADV_NORMAL, 1015 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 1016 panic("init: couldn't allocate argument space"); 1017 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 1018 1019 ipx = 0; 1020 while (1) { 1021 if (boothowto & RB_ASKNAME) { 1022 printf("init path"); 1023 if (initpaths[ipx]) 1024 printf(" (default %s)", initpaths[ipx]); 1025 printf(": "); 1026 len = cngetsn(ipath, sizeof(ipath)-1); 1027 if (len == 4 && strcmp(ipath, "halt") == 0) { 1028 kern_reboot(RB_HALT, NULL); 1029 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 1030 kern_reboot(0, NULL); 1031 #if defined(DDB) 1032 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 1033 console_debugger(); 1034 continue; 1035 #endif 1036 } else if (len > 0 && ipath[0] == '/') { 1037 ipath[len] = '\0'; 1038 path = ipath; 1039 } else if (len == 0 && initpaths[ipx] != NULL) { 1040 path = initpaths[ipx++]; 1041 } else { 1042 printf("use absolute path, "); 1043 #if defined(DDB) 1044 printf("\"ddb\", "); 1045 #endif 1046 printf("\"halt\", or \"reboot\"\n"); 1047 continue; 1048 } 1049 } else { 1050 if ((path = initpaths[ipx++]) == NULL) { 1051 ipx = 0; 1052 boothowto |= RB_ASKNAME; 1053 continue; 1054 } 1055 } 1056 1057 ucp = (char *)USRSTACK; 1058 1059 /* 1060 * Construct the boot flag argument. 1061 */ 1062 flagsp = flags; 1063 *flagsp++ = '-'; 1064 options = 0; 1065 1066 if (boothowto & RB_SINGLE) { 1067 *flagsp++ = 's'; 1068 options = 1; 1069 } 1070 #ifdef notyet 1071 if (boothowto & RB_FASTBOOT) { 1072 *flagsp++ = 'f'; 1073 options = 1; 1074 } 1075 #endif 1076 1077 /* 1078 * Move out the flags (arg 1), if necessary. 1079 */ 1080 if (options != 0) { 1081 *flagsp++ = '\0'; 1082 i = flagsp - flags; 1083 #ifdef DEBUG 1084 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1085 #endif 1086 arg1 = STACK_ALLOC(ucp, i); 1087 ucp = STACK_MAX(arg1, i); 1088 if ((error = copyout((void *)flags, arg1, i)) != 0) 1089 goto copyerr; 1090 } else 1091 arg1 = NULL; 1092 1093 /* 1094 * Move out the file name (also arg 0). 1095 */ 1096 i = strlen(path) + 1; 1097 #ifdef DEBUG 1098 aprint_normal("init: copying out path `%s' %d\n", path, i); 1099 #else 1100 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1101 printf("init: trying %s\n", path); 1102 #endif 1103 arg0 = STACK_ALLOC(ucp, i); 1104 ucp = STACK_MAX(arg0, i); 1105 if ((error = copyout(path, arg0, i)) != 0) 1106 goto copyerr; 1107 1108 /* 1109 * Move out the arg pointers. 1110 */ 1111 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1112 uap = (char **)STACK_ALLOC(ucp, sizeof(argv)); 1113 SCARG(&args, path) = arg0; 1114 SCARG(&args, argp) = uap; 1115 SCARG(&args, envp) = NULL; 1116 slash = strrchr(path, '/'); 1117 1118 argv[0] = slash ? arg0 + (slash + 1 - path) : arg0; 1119 argv[1] = arg1; 1120 argv[2] = NULL; 1121 if ((error = copyout(argv, uap, sizeof(argv))) != 0) 1122 goto copyerr; 1123 1124 /* 1125 * Now try to exec the program. If it can't for any reason 1126 * other than it doesn't exist, complain. 1127 */ 1128 error = sys_execve(l, &args, retval); 1129 if (error == 0 || error == EJUSTRETURN) { 1130 KERNEL_UNLOCK_LAST(l); 1131 return; 1132 } 1133 printf("exec %s: error %d\n", path, error); 1134 } 1135 printf("init: not found\n"); 1136 panic("no init"); 1137 copyerr: 1138 panic("copyout %d", error); 1139 } 1140 1141 /* 1142 * calculate cache size (in bytes) from physmem and vsize. 1143 */ 1144 vaddr_t 1145 calc_cache_size(vsize_t vsize, int pct, int va_pct) 1146 { 1147 paddr_t t; 1148 1149 /* XXX should consider competing cache if any */ 1150 /* XXX should consider submaps */ 1151 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1152 if (vsize != 0) { 1153 vsize = (uintmax_t)vsize * va_pct / 100; 1154 if (t > vsize) { 1155 t = vsize; 1156 } 1157 } 1158 return t; 1159 } 1160 1161 /* 1162 * Print the system start up banner. 1163 * 1164 * - Print a limited banner if AB_SILENT. 1165 * - Always send normal banner to the log. 1166 */ 1167 #define MEM_PBUFSIZE sizeof("99999 MB") 1168 1169 void 1170 banner(void) 1171 { 1172 static char notice[] = " Notice: this software is " 1173 "protected by copyright"; 1174 char pbuf[81]; 1175 void (*pr)(const char *, ...) __printflike(1, 2); 1176 int i; 1177 1178 if ((boothowto & AB_SILENT) != 0) { 1179 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1180 ostype, osrelease, kernel_ident); 1181 printf_nolog("%s", pbuf); 1182 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1183 printf(" "); 1184 printf_nolog("%s\n", notice); 1185 pr = aprint_normal; 1186 } else { 1187 pr = printf; 1188 } 1189 1190 memset(pbuf, 0, sizeof(pbuf)); 1191 (*pr)("%s%s", copyright, version); 1192 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1193 (*pr)("total memory = %s\n", pbuf); 1194 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvm_availmem(false))); 1195 (*pr)("avail memory = %s\n", pbuf); 1196 } 1197
Indexes created Sun Sep 21 20:09:37 GMT 2025