1 /* $NetBSD: init_main.c,v 1.542 2023/07/07 12:34:50 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009, 2019 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 1.542 2023/07/07 12:34:50 riastradh Exp $"); 101 102 #include "opt_cnmagic.h" 103 #include "opt_ddb.h" 104 #include "opt_heartbeat.h" 105 #include "opt_inet.h" 106 #include "opt_ipsec.h" 107 #include "opt_modular.h" 108 #include "opt_ntp.h" 109 #include "opt_pipe.h" 110 #include "opt_syscall_debug.h" 111 #include "opt_sysv.h" 112 #include "opt_fileassoc.h" 113 #include "opt_ktrace.h" 114 #include "opt_pax.h" 115 #include "opt_compat_netbsd.h" 116 #include "opt_ptrace.h" 117 #include "opt_splash.h" 118 #include "opt_kernhist.h" 119 #include "opt_gprof.h" 120 121 #if defined(SPLASHSCREEN) && defined(makeoptions_SPLASHSCREEN_IMAGE) 122 extern void *_binary_splash_image_start; 123 extern void *_binary_splash_image_end; 124 #endif 125 126 #include "ksyms.h" 127 128 #include "veriexec.h" 129 130 #include <sys/param.h> 131 #include <sys/acct.h> 132 #include <sys/filedesc.h> 133 #include <sys/file.h> 134 #include <sys/errno.h> 135 #include <sys/callout.h> 136 #include <sys/cpu.h> 137 #include <sys/cpufreq.h> 138 #include <sys/spldebug.h> 139 #include <sys/kernel.h> 140 #include <sys/mount.h> 141 #include <sys/proc.h> 142 #include <sys/lwp.h> 143 #include <sys/kthread.h> 144 #include <sys/resourcevar.h> 145 #include <sys/signalvar.h> 146 #include <sys/systm.h> 147 #include <sys/vnode.h> 148 #include <sys/fstrans.h> 149 #include <sys/tty.h> 150 #include <sys/conf.h> 151 #include <sys/disklabel.h> 152 #include <sys/buf.h> 153 #include <sys/device.h> 154 #include <sys/exec.h> 155 #include <sys/socketvar.h> 156 #include <sys/protosw.h> 157 #include <sys/percpu.h> 158 #include <sys/pserialize.h> 159 #include <sys/pset.h> 160 #include <sys/sysctl.h> 161 #include <sys/reboot.h> 162 #include <sys/event.h> 163 #include <sys/mbuf.h> 164 #include <sys/sched.h> 165 #include <sys/sleepq.h> 166 #include <sys/ipi.h> 167 #include <sys/iostat.h> 168 #include <sys/vmem.h> 169 #include <sys/uuid.h> 170 #include <sys/extent.h> 171 #include <sys/disk.h> 172 #include <sys/msgbuf.h> 173 #include <sys/module.h> 174 #include <sys/module_hook.h> 175 #include <sys/event.h> 176 #include <sys/lockf.h> 177 #include <sys/once.h> 178 #include <sys/kcpuset.h> 179 #include <sys/ksyms.h> 180 #include <sys/uidinfo.h> 181 #include <sys/kprintf.h> 182 #include <sys/bufq.h> 183 #include <sys/threadpool.h> 184 #include <sys/futex.h> 185 #ifdef IPSEC 186 #include <netipsec/ipsec.h> 187 #endif 188 #include <sys/domain.h> 189 #include <sys/namei.h> 190 #include <sys/rnd.h> 191 #include <sys/pipe.h> 192 #if NVERIEXEC > 0 193 #include <sys/verified_exec.h> 194 #endif /* NVERIEXEC > 0 */ 195 #ifdef KTRACE 196 #include <sys/ktrace.h> 197 #endif 198 #include <sys/kauth.h> 199 #include <net80211/ieee80211_netbsd.h> 200 #include <sys/cprng.h> 201 #include <sys/psref.h> 202 #include <sys/radixtree.h> 203 #include <sys/heartbeat.h> 204 205 #include <sys/syscall.h> 206 #include <sys/syscallargs.h> 207 208 #include <sys/pax.h> 209 210 #include <dev/clock_subr.h> 211 212 #include <secmodel/secmodel.h> 213 214 #include <ufs/ufs/quota.h> 215 216 #include <miscfs/genfs/genfs.h> 217 #include <miscfs/specfs/specdev.h> 218 219 #include <sys/cpu.h> 220 221 #include <uvm/uvm.h> /* extern struct uvm uvm */ 222 223 #include <dev/cons.h> 224 #include <dev/splash/splash.h> 225 226 #include <net/bpf.h> 227 #include <net/if.h> 228 #include <net/pfil.h> 229 #include <net/raw_cb.h> 230 #include <net/if_llatbl.h> 231 232 #include <prop/proplib.h> 233 234 #include <sys/userconf.h> 235 236 extern time_t rootfstime; 237 238 #ifndef curlwp 239 struct lwp *curlwp = &lwp0; 240 #endif 241 struct proc *initproc; 242 243 struct vnode *rootvp, *swapdev_vp; 244 int boothowto; 245 int cold __read_mostly = 1; /* still working on startup */ 246 int shutting_down __read_mostly; /* system is shutting down */ 247 248 int start_init_exec; /* semaphore for start_init() */ 249 250 static void check_console(struct lwp *l); 251 static void start_init(void *); 252 static void configure(void); 253 static void configure2(void); 254 static void configure3(void); 255 void main(void); 256 257 /* 258 * System startup; initialize the world, create process 0, mount root 259 * filesystem, and fork to create init and pagedaemon. Most of the 260 * hard work is done in the lower-level initialization routines including 261 * startup(), which does memory initialization and autoconfiguration. 262 */ 263 void 264 main(void) 265 { 266 struct timespec time; 267 struct lwp *l; 268 struct proc *p; 269 int s, error; 270 #ifdef NVNODE_IMPLICIT 271 int usevnodes; 272 #endif 273 CPU_INFO_ITERATOR cii; 274 struct cpu_info *ci; 275 276 #ifdef DIAGNOSTIC 277 /* 278 * Verify that CPU_INFO_FOREACH() knows about the boot CPU 279 * and only the boot CPU at this point. 280 */ 281 int cpucount = 0; 282 for (CPU_INFO_FOREACH(cii, ci)) { 283 KASSERT(ci == curcpu()); 284 cpucount++; 285 } 286 KASSERT(cpucount == 1); 287 #endif 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 #ifdef CNMAGIC 301 cn_set_magic(CNMAGIC); 302 #endif 303 304 kernel_lock_init(); 305 once_init(); 306 todr_init(); 307 308 mi_cpu_init(); 309 kernconfig_lock_init(); 310 kthread_sysinit(); 311 312 /* Initialize the device switch tables. */ 313 devsw_init(); 314 315 /* Initialize event counters. */ 316 evcnt_init(); 317 318 uvm_init(); 319 ubchist_init(); 320 kcpuset_sysinit(); 321 322 prop_kern_init(); 323 324 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 325 ksyms_init(); 326 #endif 327 kprintf_init(); 328 329 percpu_init(); 330 331 /* Initialize lock caches. */ 332 mutex_obj_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(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 signal-related data structures. */ 415 signal_init(); 416 417 /* Initialize resource management. */ 418 resource_init(); 419 420 /* Create process 0. */ 421 proc0_init(); 422 lwp0_init(); 423 424 /* Disable preemption during boot. */ 425 kpreempt_disable(); 426 427 /* Initialize the threadpool system. */ 428 threadpools_init(); 429 430 /* Initialize the UID hash table. */ 431 uid_init(); 432 433 /* Charge root for one process. */ 434 (void)chgproccnt(0, 1); 435 436 /* Initialize the run queues, turnstiles and sleep queues. */ 437 sched_rqinit(); 438 turnstile_init(); 439 sleeptab_init(&sleeptab); 440 441 sched_init(); 442 443 /* Initialize processor-sets */ 444 psets_init(); 445 446 /* Initialize cpufreq(9) */ 447 cpufreq_init(); 448 449 /* MI initialization of the boot cpu */ 450 error = mi_cpu_attach(curcpu()); 451 KASSERT(error == 0); 452 453 /* Initialize timekeeping. */ 454 time_init(); 455 456 /* 457 * Initialize mbuf's. Do this now because we might attempt to 458 * allocate mbufs or mbuf clusters during autoconfiguration. 459 */ 460 mbinit(); 461 462 /* Initialize I/O statistics. */ 463 iostat_init(); 464 465 /* Initialize the log device. */ 466 loginit(); 467 468 /* Second part of module system initialization. */ 469 module_start_unload_thread(); 470 471 /* Initialize autoconf data structures before any modules are loaded */ 472 config_init_mi(); 473 474 /* Initialize the file systems. */ 475 #ifdef NVNODE_IMPLICIT 476 /* 477 * If maximum number of vnodes in namei vnode cache is not explicitly 478 * defined in kernel config, adjust the number such as we use roughly 479 * 10% of memory for vnodes and associated data structures in the 480 * assumed worst case. Do not provide fewer than NVNODE vnodes. 481 */ 482 usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 483 10, VNODE_KMEM_MAXPCT) / VNODE_COST; 484 if (usevnodes > desiredvnodes) 485 desiredvnodes = usevnodes; 486 #endif /* NVNODE_IMPLICIT */ 487 #ifdef MAXFILES_IMPLICIT 488 /* 489 * If maximum number of files is not explicitly defined in 490 * kernel config, adjust the number so that it is somewhat 491 * more reasonable on machines with larger memory sizes. 492 * Arbitrary numbers are 20,000 files for 16GB RAM or more 493 * and 10,000 files for 1GB RAM or more. 494 * 495 * XXXtodo: adjust this and other values totally dynamically 496 */ 497 if (ctob((uint64_t)physmem) >= 16ULL * 1024 * 1024 * 1024) 498 maxfiles = MAX(maxfiles, 20000); 499 if (ctob((uint64_t)physmem) >= 1024 * 1024 * 1024) 500 maxfiles = MAX(maxfiles, 10000); 501 #endif /* MAXFILES_IMPLICIT */ 502 503 /* Initialize fstrans. */ 504 fstrans_init(); 505 506 vfsinit(); 507 lf_init(); 508 509 /* Initialize the file descriptor system. */ 510 fd_sys_init(); 511 512 /* Initialize cwd structures */ 513 cwd_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 #ifdef HEARTBEAT 563 /* 564 * Now that softints can be established, start monitoring 565 * system heartbeat on all CPUs. 566 */ 567 heartbeat_start(); 568 #endif 569 570 ssp_init(); 571 572 ubc_init(); /* must be after autoconfig */ 573 574 mm_init(); 575 576 configure2(); 577 578 /* Initialize the rest of ipi(9) after CPUs have been detected. */ 579 ipi_percpu_init(); 580 581 futex_sys_init(); 582 583 /* Now timer is working. Enable preemption. */ 584 kpreempt_enable(); 585 586 /* Get the threads going and into any sleeps before continuing. */ 587 yield(); 588 589 vmem_rehash_start(); /* must be before exec_init */ 590 591 /* Initialize exec structures */ 592 exec_init(1); /* seminit calls exithook_establish() */ 593 594 #if NVERIEXEC > 0 595 /* 596 * Initialise the Veriexec subsystem. 597 */ 598 veriexec_init(); 599 #endif /* NVERIEXEC > 0 */ 600 601 pax_init(); 602 603 #ifdef IPSEC 604 /* Attach network crypto subsystem */ 605 ipsec_attach(); 606 #endif 607 608 /* 609 * Initialize protocols. Block reception of incoming packets 610 * until everything is ready. 611 */ 612 s = splnet(); 613 ifinit(); 614 #if defined(INET) || defined(INET6) 615 lltableinit(); 616 #endif 617 domaininit(true); 618 ifinit_post(); 619 if_attachdomain(); 620 splx(s); 621 622 #ifdef GPROF 623 /* Initialize kernel profiling. */ 624 kmstartup(); 625 #endif 626 627 /* Initialize system accounting. */ 628 acct_init(); 629 630 #ifndef PIPE_SOCKETPAIR 631 /* Initialize pipes. */ 632 pipe_init(); 633 #endif 634 635 #ifdef KTRACE 636 /* Initialize ktrace. */ 637 ktrinit(); 638 #endif 639 640 machdep_init(); 641 642 procinit_sysctl(); 643 644 scdebug_init(); 645 646 /* 647 * Create process 1 (init(8)). We do this now, as Unix has 648 * historically had init be process 1, and changing this would 649 * probably upset a lot of people. 650 * 651 * Note that process 1 won't immediately exec init(8), but will 652 * wait for us to inform it that the root file system has been 653 * mounted. 654 */ 655 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL)) 656 panic("fork init"); 657 658 /* 659 * The initproc variable cannot be initialized in start_init as there 660 * is a race between vfs_mountroot and start_init. 661 */ 662 mutex_enter(&proc_lock); 663 initproc = proc_find_raw(1); 664 mutex_exit(&proc_lock); 665 666 /* 667 * Load any remaining builtin modules, and hand back temporary 668 * storage to the VM system. Then require force when loading any 669 * remaining un-init'ed built-in modules to avoid later surprises. 670 */ 671 module_init_class(MODULE_CLASS_ANY); 672 module_builtin_require_force(); 673 674 /* 675 * Finalize configuration now that all real devices have been 676 * found. This needs to be done before the root device is 677 * selected, since finalization may create the root device. 678 */ 679 config_finalize(); 680 681 sysctl_finalize(); 682 683 /* 684 * Now that autoconfiguration has completed, we can determine 685 * the root and dump devices. 686 */ 687 cpu_rootconf(); 688 cpu_dumpconf(); 689 690 /* Mount the root file system. */ 691 do { 692 domountroothook(root_device); 693 if ((error = vfs_mountroot())) { 694 printf("cannot mount root, error = %d\n", error); 695 boothowto |= RB_ASKNAME; 696 setroot(root_device, 697 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 698 } 699 } while (error != 0); 700 mountroothook_destroy(); 701 702 configure3(); 703 704 /* 705 * Initialise the time-of-day clock, passing the time recorded 706 * in the root filesystem (if any) for use by systems that 707 * don't have a non-volatile time-of-day device. 708 */ 709 inittodr(rootfstime); 710 711 /* 712 * Now can look at time, having had a chance to verify the time 713 * from the file system. Reset l->l_rtime as it may have been 714 * munched in mi_switch() after the time got set. 715 */ 716 getnanotime(&time); 717 718 mutex_enter(&proc_lock); 719 LIST_FOREACH(p, &allproc, p_list) { 720 KASSERT((p->p_flag & PK_MARKER) == 0); 721 mutex_enter(p->p_lock); 722 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 723 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 724 lwp_lock(l); 725 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 726 lwp_unlock(l); 727 } 728 mutex_exit(p->p_lock); 729 } 730 mutex_exit(&proc_lock); 731 binuptime(&curlwp->l_stime); 732 733 for (CPU_INFO_FOREACH(cii, ci)) { 734 ci->ci_schedstate.spc_lastmod = time_second; 735 } 736 737 /* Create the pageout daemon kernel thread. */ 738 uvm_swap_init(); 739 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 740 NULL, NULL, "pgdaemon")) 741 panic("fork pagedaemon"); 742 743 /* Create the filesystem syncer kernel thread. */ 744 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 745 NULL, NULL, "ioflush")) 746 panic("fork syncer"); 747 748 /* Wait for final configure threads to complete. */ 749 config_finalize_mountroot(); 750 751 /* 752 * Okay, now we can let init(8) exec! It's off to userland! 753 */ 754 mutex_enter(&proc_lock); 755 start_init_exec = 1; 756 cv_broadcast(&lbolt); 757 mutex_exit(&proc_lock); 758 759 /* The scheduler is an infinite loop. */ 760 uvm_scheduler(); 761 /* NOTREACHED */ 762 } 763 764 /* 765 * Configure the system's hardware. 766 */ 767 static void 768 configure(void) 769 { 770 771 /* 772 * XXX 773 * callout_setfunc() requires mutex(9) so it can't be in config_init() 774 * on amiga and atari which use config_init() and autoconf(9) functions 775 * to initialize console devices. 776 */ 777 config_twiddle_init(); 778 779 pmf_init(); 780 781 /* Initialize driver modules */ 782 module_init_class(MODULE_CLASS_DRIVER); 783 784 userconf_init(); 785 if (boothowto & RB_USERCONF) 786 userconf_prompt(); 787 788 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 789 printf_nolog("Detecting hardware..."); 790 } 791 792 /* 793 * Do the machine-dependent portion of autoconfiguration. This 794 * sets the configuration machinery here in motion by "finding" 795 * the root bus. When this function returns, we expect interrupts 796 * to be enabled. 797 */ 798 cpu_configure(); 799 } 800 801 static void 802 configure2(void) 803 { 804 CPU_INFO_ITERATOR cii; 805 struct cpu_info *ci; 806 int s; 807 808 /* Fix up CPU topology info, which has all been collected by now. */ 809 cpu_topology_init(); 810 811 /* 812 * Now that we've found all the hardware, start the real time 813 * and statistics clocks. 814 */ 815 initclocks(); 816 817 cold = 0; /* clocks are running, we're warm now! */ 818 s = splsched(); 819 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 820 splx(s); 821 822 /* Setup the runqueues and scheduler. */ 823 runq_init(); 824 synch_init(); 825 826 /* Boot the secondary processors. */ 827 for (CPU_INFO_FOREACH(cii, ci)) { 828 uvm_cpu_attach(ci); 829 } 830 831 /* Decide how to partition free memory. */ 832 uvm_page_rebucket(); 833 834 mp_online = true; 835 #if defined(MULTIPROCESSOR) 836 cpu_boot_secondary_processors(); 837 #endif 838 839 /* 840 * Bus scans can make it appear as if the system has paused, so 841 * twiddle constantly while config_interrupts() jobs are running. 842 */ 843 config_twiddle_fn(NULL); 844 845 /* 846 * Create threads to call back and finish configuration for 847 * devices that want interrupts enabled. 848 */ 849 config_create_interruptthreads(); 850 } 851 852 static void 853 configure3(void) 854 { 855 856 /* 857 * Create threads to call back and finish configuration for 858 * devices that want the mounted root file system. 859 */ 860 config_create_mountrootthreads(); 861 862 /* Get the threads going and into any sleeps before continuing. */ 863 yield(); 864 } 865 866 static void 867 rootconf_handle_wedges(void) 868 { 869 struct disklabel label; 870 struct partition *p; 871 struct vnode *vp; 872 daddr_t startblk; 873 uint64_t nblks; 874 device_t dev; 875 int error; 876 877 if (booted_nblks) { 878 /* 879 * bootloader passed geometry 880 */ 881 dev = booted_device; 882 startblk = booted_startblk; 883 nblks = booted_nblks; 884 885 /* 886 * keep booted_device and booted_partition 887 * in case the kernel doesn't identify a wedge 888 */ 889 } else { 890 /* 891 * bootloader passed partition number 892 * 893 * We cannot ask the partition device directly when it is 894 * covered by a wedge. Instead we look up the geometry in 895 * the disklabel. 896 */ 897 vp = opendisk(booted_device); 898 899 if (vp == NULL) 900 return; 901 902 VOP_UNLOCK(vp); 903 error = VOP_IOCTL(vp, DIOCGDINFO, &label, FREAD, NOCRED); 904 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 905 VOP_CLOSE(vp, FREAD, NOCRED); 906 vput(vp); 907 if (error) 908 return; 909 910 KASSERT(booted_partition >= 0 911 && booted_partition < MAXPARTITIONS); 912 913 p = &label.d_partitions[booted_partition]; 914 915 dev = booted_device; 916 startblk = p->p_offset; 917 nblks = p->p_size; 918 } 919 920 dev = dkwedge_find_partition(dev, startblk, nblks); 921 if (dev != NULL) { 922 booted_device = dev; 923 booted_partition = 0; 924 } 925 } 926 927 void 928 rootconf(void) 929 { 930 if (booted_device != NULL) 931 rootconf_handle_wedges(); 932 933 setroot(booted_device, booted_partition); 934 } 935 936 static void 937 check_console(struct lwp *l) 938 { 939 struct vnode *vp; 940 int error; 941 942 error = namei_simple_kernel("/dev/console", 943 NSM_FOLLOW_NOEMULROOT, &vp); 944 if (error == 0) { 945 vrele(vp); 946 } else if (error == ENOENT) { 947 if (boothowto & (AB_VERBOSE|AB_DEBUG)) 948 printf("warning: no /dev/console\n"); 949 } else { 950 printf("warning: lookup /dev/console: error %d\n", error); 951 } 952 } 953 954 /* 955 * List of paths to try when searching for "init". 956 */ 957 static const char * const initpaths[] = { 958 "/sbin/init", 959 "/sbin/oinit", 960 "/sbin/init.bak", 961 "/rescue/init", 962 NULL, 963 }; 964 965 /* 966 * Start the initial user process; try exec'ing each pathname in "initpaths". 967 * The program is invoked with one argument containing the boot flags. 968 */ 969 static void 970 start_init(void *arg) 971 { 972 struct lwp *l = arg; 973 struct proc *p = l->l_proc; 974 vaddr_t addr; 975 struct sys_execve_args /* { 976 syscallarg(const char *) path; 977 syscallarg(char * const *) argp; 978 syscallarg(char * const *) envp; 979 } */ args; 980 int options, i, error; 981 register_t retval[2]; 982 char flags[4], *flagsp; 983 const char *path, *slash; 984 char *ucp, **uap, *arg0, *arg1, *argv[3]; 985 char ipath[129]; 986 int ipx, len; 987 988 /* 989 * Now in process 1. 990 */ 991 strncpy(p->p_comm, "init", MAXCOMLEN); 992 993 /* 994 * Wait for main() to tell us that it's safe to exec. 995 */ 996 mutex_enter(&proc_lock); 997 while (start_init_exec == 0) 998 cv_wait(&lbolt, &proc_lock); 999 mutex_exit(&proc_lock); 1000 1001 /* 1002 * This is not the right way to do this. We really should 1003 * hand-craft a descriptor onto /dev/console to hand to init, 1004 * but that's a _lot_ more work, and the benefit from this easy 1005 * hack makes up for the "good is the enemy of the best" effect. 1006 */ 1007 check_console(l); 1008 1009 /* 1010 * Need just enough stack to hold the faked-up "execve()" arguments. 1011 */ 1012 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 1013 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 1014 NULL, UVM_UNKNOWN_OFFSET, 0, 1015 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_COPY, 1016 UVM_ADV_NORMAL, 1017 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 1018 panic("init: couldn't allocate argument space"); 1019 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 1020 1021 ipx = 0; 1022 while (1) { 1023 if (boothowto & RB_ASKNAME) { 1024 printf("init path"); 1025 if (initpaths[ipx]) 1026 printf(" (default %s)", initpaths[ipx]); 1027 printf(": "); 1028 len = cngetsn(ipath, sizeof(ipath)-1); 1029 if (len == 4 && strcmp(ipath, "halt") == 0) { 1030 kern_reboot(RB_HALT, NULL); 1031 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 1032 kern_reboot(0, NULL); 1033 #if defined(DDB) 1034 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 1035 console_debugger(); 1036 continue; 1037 #endif 1038 } else if (len > 0 && ipath[0] == '/') { 1039 ipath[len] = '\0'; 1040 path = ipath; 1041 } else if (len == 0 && initpaths[ipx] != NULL) { 1042 path = initpaths[ipx++]; 1043 } else { 1044 printf("use absolute path, "); 1045 #if defined(DDB) 1046 printf("\"ddb\", "); 1047 #endif 1048 printf("\"halt\", or \"reboot\"\n"); 1049 continue; 1050 } 1051 } else { 1052 if ((path = initpaths[ipx++]) == NULL) { 1053 ipx = 0; 1054 boothowto |= RB_ASKNAME; 1055 continue; 1056 } 1057 } 1058 1059 ucp = (char *)USRSTACK; 1060 1061 /* 1062 * Construct the boot flag argument. 1063 */ 1064 flagsp = flags; 1065 *flagsp++ = '-'; 1066 options = 0; 1067 1068 if (boothowto & RB_SINGLE) { 1069 *flagsp++ = 's'; 1070 options = 1; 1071 } 1072 #ifdef notyet 1073 if (boothowto & RB_FASTBOOT) { 1074 *flagsp++ = 'f'; 1075 options = 1; 1076 } 1077 #endif 1078 1079 /* 1080 * Move out the flags (arg 1), if necessary. 1081 */ 1082 if (options != 0) { 1083 *flagsp++ = '\0'; 1084 i = flagsp - flags; 1085 #ifdef DEBUG 1086 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1087 #endif 1088 arg1 = STACK_ALLOC(ucp, i); 1089 ucp = STACK_MAX(arg1, i); 1090 if ((error = copyout((void *)flags, arg1, i)) != 0) 1091 goto copyerr; 1092 } else 1093 arg1 = NULL; 1094 1095 /* 1096 * Move out the file name (also arg 0). 1097 */ 1098 i = strlen(path) + 1; 1099 #ifdef DEBUG 1100 aprint_normal("init: copying out path `%s' %d\n", path, i); 1101 #else 1102 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1103 printf("init: trying %s\n", path); 1104 #endif 1105 arg0 = STACK_ALLOC(ucp, i); 1106 ucp = STACK_MAX(arg0, i); 1107 if ((error = copyout(path, arg0, i)) != 0) 1108 goto copyerr; 1109 1110 /* 1111 * Move out the arg pointers. 1112 */ 1113 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1114 uap = (char **)STACK_ALLOC(ucp, sizeof(argv)); 1115 SCARG(&args, path) = arg0; 1116 SCARG(&args, argp) = uap; 1117 SCARG(&args, envp) = NULL; 1118 slash = strrchr(path, '/'); 1119 1120 argv[0] = slash ? arg0 + (slash + 1 - path) : arg0; 1121 argv[1] = arg1; 1122 argv[2] = NULL; 1123 if ((error = copyout(argv, uap, sizeof(argv))) != 0) 1124 goto copyerr; 1125 1126 /* 1127 * Now try to exec the program. If it can't for any reason 1128 * other than it doesn't exist, complain. 1129 */ 1130 error = sys_execve(l, &args, retval); 1131 if (error == 0 || error == EJUSTRETURN) { 1132 KERNEL_UNLOCK_LAST(l); 1133 return; 1134 } 1135 printf("exec %s: error %d\n", path, error); 1136 } 1137 printf("init: not found\n"); 1138 panic("no init"); 1139 copyerr: 1140 panic("copyout %d", error); 1141 } 1142 1143 /* 1144 * calculate cache size (in bytes) from physmem and vsize. 1145 */ 1146 vaddr_t 1147 calc_cache_size(vsize_t vsize, int pct, int va_pct) 1148 { 1149 paddr_t t; 1150 1151 /* XXX should consider competing cache if any */ 1152 /* XXX should consider submaps */ 1153 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1154 if (vsize != 0) { 1155 vsize = (uintmax_t)vsize * va_pct / 100; 1156 if (t > vsize) { 1157 t = vsize; 1158 } 1159 } 1160 return t; 1161 } 1162 1163 /* 1164 * Print the system start up banner. 1165 * 1166 * - Print a limited banner if AB_SILENT. 1167 * - Always send normal banner to the log. 1168 */ 1169 #define MEM_PBUFSIZE sizeof("99999 MB") 1170 1171 void 1172 banner(void) 1173 { 1174 static char notice[] = " Notice: this software is " 1175 "protected by copyright"; 1176 char pbuf[81]; 1177 void (*pr)(const char *, ...) __printflike(1, 2); 1178 int i; 1179 1180 if ((boothowto & AB_SILENT) != 0) { 1181 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1182 ostype, osrelease, kernel_ident); 1183 printf_nolog("%s", pbuf); 1184 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1185 printf(" "); 1186 printf_nolog("%s\n", notice); 1187 pr = aprint_normal; 1188 } else { 1189 pr = printf; 1190 } 1191 1192 memset(pbuf, 0, sizeof(pbuf)); 1193 (*pr)("%s%s", copyright, version); 1194 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1195 (*pr)("total memory = %s\n", pbuf); 1196 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvm_availmem(false))); 1197 (*pr)("avail memory = %s\n", pbuf); 1198 } 1199