1 /* $NetBSD: init_main.c,v 1.541 2022/10/26 23:20:47 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 1.541 2022/10/26 23:20:47 riastradh 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> 202 203 #include <sys/syscall.h> 204 #include <sys/syscallargs.h> 205 206 #include <sys/pax.h> 207 208 #include <dev/clock_subr.h> 209 210 #include <secmodel/secmodel.h> 211 212 #include <ufs/ufs/quota.h> 213 214 #include <miscfs/genfs/genfs.h> 215 #include <miscfs/specfs/specdev.h> 216 217 #include <sys/cpu.h> 218 219 #include <uvm/uvm.h> /* extern struct uvm uvm */ 220 221 #include <dev/cons.h> 222 #include <dev/splash/splash.h> 223 224 #include <net/bpf.h> 225 #include <net/if.h> 226 #include <net/pfil.h> 227 #include <net/raw_cb.h> 228 #include <net/if_llatbl.h> 229 230 #include <prop/proplib.h> 231 232 #include <sys/userconf.h> 233 234 extern time_t rootfstime; 235 236 #ifndef curlwp 237 struct lwp *curlwp = &lwp0; 238 #endif 239 struct proc *initproc; 240 241 struct vnode *rootvp, *swapdev_vp; 242 int boothowto; 243 int cold __read_mostly = 1; /* still working on startup */ 244 int shutting_down __read_mostly; /* system is shutting down */ 245 246 int start_init_exec; /* semaphore for start_init() */ 247 248 static void check_console(struct lwp *l); 249 static void start_init(void *); 250 static void configure(void); 251 static void configure2(void); 252 static void configure3(void); 253 void main(void); 254 255 /* 256 * System startup; initialize the world, create process 0, mount root 257 * filesystem, and fork to create init and pagedaemon. Most of the 258 * hard work is done in the lower-level initialization routines including 259 * startup(), which does memory initialization and autoconfiguration. 260 */ 261 void 262 main(void) 263 { 264 struct timespec time; 265 struct lwp *l; 266 struct proc *p; 267 int s, error; 268 #ifdef NVNODE_IMPLICIT 269 int usevnodes; 270 #endif 271 CPU_INFO_ITERATOR cii; 272 struct cpu_info *ci; 273 274 #ifdef DIAGNOSTIC 275 /* 276 * Verify that CPU_INFO_FOREACH() knows about the boot CPU 277 * and only the boot CPU at this point. 278 */ 279 int cpucount = 0; 280 for (CPU_INFO_FOREACH(cii, ci)) { 281 KASSERT(ci == curcpu()); 282 cpucount++; 283 } 284 KASSERT(cpucount == 1); 285 #endif 286 287 l = &lwp0; 288 #ifndef LWP0_CPU_INFO 289 l->l_cpu = curcpu(); 290 #endif 291 l->l_pflag |= LP_RUNNING; 292 293 /* 294 * Attempt to find console and initialize 295 * in case of early panic or other messages. 296 */ 297 consinit(); 298 #ifdef CNMAGIC 299 cn_set_magic(CNMAGIC); 300 #endif 301 302 kernel_lock_init(); 303 once_init(); 304 todr_init(); 305 306 mi_cpu_init(); 307 kernconfig_lock_init(); 308 kthread_sysinit(); 309 310 /* Initialize the device switch tables. */ 311 devsw_init(); 312 313 /* Initialize event counters. */ 314 evcnt_init(); 315 316 uvm_init(); 317 ubchist_init(); 318 kcpuset_sysinit(); 319 320 prop_kern_init(); 321 322 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 323 ksyms_init(); 324 #endif 325 kprintf_init(); 326 327 percpu_init(); 328 329 /* Initialize lock caches. */ 330 mutex_obj_init(); 331 332 /* Initialize radix trees (used by numerous subsystems). */ 333 radix_tree_init(); 334 335 /* Passive serialization. */ 336 pserialize_init(); 337 338 /* Initialize the extent manager. */ 339 extent_init(); 340 341 /* Do machine-dependent initialization. */ 342 cpu_startup(); 343 344 /* Initialize the sysctl subsystem. */ 345 sysctl_init(); 346 347 /* Initialize callouts, part 1. */ 348 callout_startup(); 349 350 /* Initialize the kernel authorization subsystem. */ 351 kauth_init(); 352 353 secmodel_init(); 354 355 spec_init(); 356 357 /* 358 * Set BPF op vector. Can't do this in bpf attach, since 359 * network drivers attach before bpf. 360 */ 361 bpf_setops(); 362 363 /* Initialize what we can in ipi(9) before CPUs are detected. */ 364 ipi_sysinit(); 365 366 /* Start module system. */ 367 module_init(); 368 module_hook_init(); 369 370 /* 371 * Initialize the kernel authorization subsystem and start the 372 * default security model, if any. We need to do this early 373 * enough so that subsystems relying on any of the aforementioned 374 * can work properly. Since the security model may dictate the 375 * credential inheritance policy, it is needed at least before 376 * any process is created, specifically proc0. 377 */ 378 module_init_class(MODULE_CLASS_SECMODEL); 379 380 /* Initialize the buffer cache */ 381 bufinit(); 382 biohist_init(); 383 384 #ifdef KERNHIST 385 sysctl_kernhist_init(); 386 #endif 387 388 389 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_IMAGE) 390 size_t splash_size = (&_binary_splash_image_end - 391 &_binary_splash_image_start) * sizeof(void *); 392 splash_setimage(&_binary_splash_image_start, splash_size); 393 #endif 394 395 /* Initialize sockets. */ 396 soinit(); 397 398 /* 399 * The following things must be done before autoconfiguration. 400 */ 401 rnd_init(); /* initialize entropy pool */ 402 403 cprng_init(); /* initialize cryptographic PRNG */ 404 405 /* Initialize process and pgrp structures. */ 406 procinit(); 407 lwpinit(); 408 409 /* Must be called after lwpinit (lwpinit_specificdata) */ 410 psref_init(); 411 412 /* Initialize signal-related data structures. */ 413 signal_init(); 414 415 /* Initialize resource management. */ 416 resource_init(); 417 418 /* Create process 0. */ 419 proc0_init(); 420 lwp0_init(); 421 422 /* Disable preemption during boot. */ 423 kpreempt_disable(); 424 425 /* Initialize the threadpool system. */ 426 threadpools_init(); 427 428 /* Initialize the UID hash table. */ 429 uid_init(); 430 431 /* Charge root for one process. */ 432 (void)chgproccnt(0, 1); 433 434 /* Initialize the run queues, turnstiles and sleep queues. */ 435 sched_rqinit(); 436 turnstile_init(); 437 sleeptab_init(&sleeptab); 438 439 sched_init(); 440 441 /* Initialize processor-sets */ 442 psets_init(); 443 444 /* Initialize cpufreq(9) */ 445 cpufreq_init(); 446 447 /* MI initialization of the boot cpu */ 448 error = mi_cpu_attach(curcpu()); 449 KASSERT(error == 0); 450 451 /* Initialize timekeeping. */ 452 time_init(); 453 454 /* 455 * Initialize mbuf's. Do this now because we might attempt to 456 * allocate mbufs or mbuf clusters during autoconfiguration. 457 */ 458 mbinit(); 459 460 /* Initialize I/O statistics. */ 461 iostat_init(); 462 463 /* Initialize the log device. */ 464 loginit(); 465 466 /* Second part of module system initialization. */ 467 module_start_unload_thread(); 468 469 /* Initialize autoconf data structures before any modules are loaded */ 470 config_init_mi(); 471 472 /* Initialize the file systems. */ 473 #ifdef NVNODE_IMPLICIT 474 /* 475 * If maximum number of vnodes in namei vnode cache is not explicitly 476 * defined in kernel config, adjust the number such as we use roughly 477 * 10% of memory for vnodes and associated data structures in the 478 * assumed worst case. Do not provide fewer than NVNODE vnodes. 479 */ 480 usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 481 10, VNODE_KMEM_MAXPCT) / VNODE_COST; 482 if (usevnodes > desiredvnodes) 483 desiredvnodes = usevnodes; 484 #endif /* NVNODE_IMPLICIT */ 485 #ifdef MAXFILES_IMPLICIT 486 /* 487 * If maximum number of files is not explicitly defined in 488 * kernel config, adjust the number so that it is somewhat 489 * more reasonable on machines with larger memory sizes. 490 * Arbitrary numbers are 20,000 files for 16GB RAM or more 491 * and 10,000 files for 1GB RAM or more. 492 * 493 * XXXtodo: adjust this and other values totally dynamically 494 */ 495 if (ctob((uint64_t)physmem) >= 16ULL * 1024 * 1024 * 1024) 496 maxfiles = MAX(maxfiles, 20000); 497 if (ctob((uint64_t)physmem) >= 1024 * 1024 * 1024) 498 maxfiles = MAX(maxfiles, 10000); 499 #endif /* MAXFILES_IMPLICIT */ 500 501 /* Initialize fstrans. */ 502 fstrans_init(); 503 504 vfsinit(); 505 lf_init(); 506 507 /* Initialize the file descriptor system. */ 508 fd_sys_init(); 509 510 /* Initialize cwd structures */ 511 cwd_sys_init(); 512 513 /* Initialize kqueue. */ 514 kqueue_init(); 515 516 inittimecounter(); 517 ntp_init(); 518 519 /* Initialize tty subsystem. */ 520 tty_init(); 521 ttyldisc_init(); 522 523 /* Initialize the buffer cache, part 2. */ 524 bufinit2(); 525 526 /* Initialize the disk wedge subsystem. */ 527 dkwedge_init(); 528 529 /* Initialize pfil */ 530 pfil_init(); 531 532 /* Initialize interfaces. */ 533 ifinit1(); 534 535 spldebug_start(); 536 537 /* Initialize sockets thread(s) */ 538 soinit1(); 539 540 /* 541 * Initialize the bufq strategy sub-system and any built-in 542 * strategy modules - they may be needed by some devices during 543 * auto-configuration 544 */ 545 bufq_init(); 546 module_init_class(MODULE_CLASS_BUFQ); 547 548 /* Configure the system hardware. This will enable interrupts. */ 549 configure(); 550 #ifdef __HAVE_LEGACY_INTRCNT 551 evcnt_attach_legacy_intrcnt(); 552 #endif 553 554 /* Enable deferred processing of RNG samples */ 555 rnd_init_softint(); 556 557 /* Once all CPUs are detected, initialize the per-CPU cprng_fast. */ 558 cprng_fast_init(); 559 560 ssp_init(); 561 562 ubc_init(); /* must be after autoconfig */ 563 564 mm_init(); 565 566 configure2(); 567 568 /* Initialize the rest of ipi(9) after CPUs have been detected. */ 569 ipi_percpu_init(); 570 571 futex_sys_init(); 572 573 /* Now timer is working. Enable preemption. */ 574 kpreempt_enable(); 575 576 /* Get the threads going and into any sleeps before continuing. */ 577 yield(); 578 579 vmem_rehash_start(); /* must be before exec_init */ 580 581 /* Initialize exec structures */ 582 exec_init(1); /* seminit calls exithook_establish() */ 583 584 #if NVERIEXEC > 0 585 /* 586 * Initialise the Veriexec subsystem. 587 */ 588 veriexec_init(); 589 #endif /* NVERIEXEC > 0 */ 590 591 pax_init(); 592 593 #ifdef IPSEC 594 /* Attach network crypto subsystem */ 595 ipsec_attach(); 596 #endif 597 598 /* 599 * Initialize protocols. Block reception of incoming packets 600 * until everything is ready. 601 */ 602 s = splnet(); 603 ifinit(); 604 #if defined(INET) || defined(INET6) 605 lltableinit(); 606 #endif 607 domaininit(true); 608 ifinit_post(); 609 if_attachdomain(); 610 splx(s); 611 612 #ifdef GPROF 613 /* Initialize kernel profiling. */ 614 kmstartup(); 615 #endif 616 617 /* Initialize system accounting. */ 618 acct_init(); 619 620 #ifndef PIPE_SOCKETPAIR 621 /* Initialize pipes. */ 622 pipe_init(); 623 #endif 624 625 #ifdef KTRACE 626 /* Initialize ktrace. */ 627 ktrinit(); 628 #endif 629 630 machdep_init(); 631 632 procinit_sysctl(); 633 634 scdebug_init(); 635 636 /* 637 * Create process 1 (init(8)). We do this now, as Unix has 638 * historically had init be process 1, and changing this would 639 * probably upset a lot of people. 640 * 641 * Note that process 1 won't immediately exec init(8), but will 642 * wait for us to inform it that the root file system has been 643 * mounted. 644 */ 645 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL)) 646 panic("fork init"); 647 648 /* 649 * The initproc variable cannot be initialized in start_init as there 650 * is a race between vfs_mountroot and start_init. 651 */ 652 mutex_enter(&proc_lock); 653 initproc = proc_find_raw(1); 654 mutex_exit(&proc_lock); 655 656 /* 657 * Load any remaining builtin modules, and hand back temporary 658 * storage to the VM system. Then require force when loading any 659 * remaining un-init'ed built-in modules to avoid later surprises. 660 */ 661 module_init_class(MODULE_CLASS_ANY); 662 module_builtin_require_force(); 663 664 /* 665 * Finalize configuration now that all real devices have been 666 * found. This needs to be done before the root device is 667 * selected, since finalization may create the root device. 668 */ 669 config_finalize(); 670 671 sysctl_finalize(); 672 673 /* 674 * Now that autoconfiguration has completed, we can determine 675 * the root and dump devices. 676 */ 677 cpu_rootconf(); 678 cpu_dumpconf(); 679 680 /* Mount the root file system. */ 681 do { 682 domountroothook(root_device); 683 if ((error = vfs_mountroot())) { 684 printf("cannot mount root, error = %d\n", error); 685 boothowto |= RB_ASKNAME; 686 setroot(root_device, 687 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 688 } 689 } while (error != 0); 690 mountroothook_destroy(); 691 692 configure3(); 693 694 /* 695 * Initialise the time-of-day clock, passing the time recorded 696 * in the root filesystem (if any) for use by systems that 697 * don't have a non-volatile time-of-day device. 698 */ 699 inittodr(rootfstime); 700 701 /* 702 * Now can look at time, having had a chance to verify the time 703 * from the file system. Reset l->l_rtime as it may have been 704 * munched in mi_switch() after the time got set. 705 */ 706 getnanotime(&time); 707 708 mutex_enter(&proc_lock); 709 LIST_FOREACH(p, &allproc, p_list) { 710 KASSERT((p->p_flag & PK_MARKER) == 0); 711 mutex_enter(p->p_lock); 712 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 713 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 714 lwp_lock(l); 715 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 716 lwp_unlock(l); 717 } 718 mutex_exit(p->p_lock); 719 } 720 mutex_exit(&proc_lock); 721 binuptime(&curlwp->l_stime); 722 723 for (CPU_INFO_FOREACH(cii, ci)) { 724 ci->ci_schedstate.spc_lastmod = time_second; 725 } 726 727 /* Create the pageout daemon kernel thread. */ 728 uvm_swap_init(); 729 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 730 NULL, NULL, "pgdaemon")) 731 panic("fork pagedaemon"); 732 733 /* Create the filesystem syncer kernel thread. */ 734 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 735 NULL, NULL, "ioflush")) 736 panic("fork syncer"); 737 738 /* Wait for final configure threads to complete. */ 739 config_finalize_mountroot(); 740 741 /* 742 * Okay, now we can let init(8) exec! It's off to userland! 743 */ 744 mutex_enter(&proc_lock); 745 start_init_exec = 1; 746 cv_broadcast(&lbolt); 747 mutex_exit(&proc_lock); 748 749 /* The scheduler is an infinite loop. */ 750 uvm_scheduler(); 751 /* NOTREACHED */ 752 } 753 754 /* 755 * Configure the system's hardware. 756 */ 757 static void 758 configure(void) 759 { 760 761 /* 762 * XXX 763 * callout_setfunc() requires mutex(9) so it can't be in config_init() 764 * on amiga and atari which use config_init() and autoconf(9) functions 765 * to initialize console devices. 766 */ 767 config_twiddle_init(); 768 769 pmf_init(); 770 771 /* Initialize driver modules */ 772 module_init_class(MODULE_CLASS_DRIVER); 773 774 userconf_init(); 775 if (boothowto & RB_USERCONF) 776 userconf_prompt(); 777 778 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 779 printf_nolog("Detecting hardware..."); 780 } 781 782 /* 783 * Do the machine-dependent portion of autoconfiguration. This 784 * sets the configuration machinery here in motion by "finding" 785 * the root bus. When this function returns, we expect interrupts 786 * to be enabled. 787 */ 788 cpu_configure(); 789 } 790 791 static void 792 configure2(void) 793 { 794 CPU_INFO_ITERATOR cii; 795 struct cpu_info *ci; 796 int s; 797 798 /* Fix up CPU topology info, which has all been collected by now. */ 799 cpu_topology_init(); 800 801 /* 802 * Now that we've found all the hardware, start the real time 803 * and statistics clocks. 804 */ 805 initclocks(); 806 807 cold = 0; /* clocks are running, we're warm now! */ 808 s = splsched(); 809 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 810 splx(s); 811 812 /* Setup the runqueues and scheduler. */ 813 runq_init(); 814 synch_init(); 815 816 /* Boot the secondary processors. */ 817 for (CPU_INFO_FOREACH(cii, ci)) { 818 uvm_cpu_attach(ci); 819 } 820 821 /* Decide how to partition free memory. */ 822 uvm_page_rebucket(); 823 824 mp_online = true; 825 #if defined(MULTIPROCESSOR) 826 cpu_boot_secondary_processors(); 827 #endif 828 829 /* 830 * Bus scans can make it appear as if the system has paused, so 831 * twiddle constantly while config_interrupts() jobs are running. 832 */ 833 config_twiddle_fn(NULL); 834 835 /* 836 * Create threads to call back and finish configuration for 837 * devices that want interrupts enabled. 838 */ 839 config_create_interruptthreads(); 840 } 841 842 static void 843 configure3(void) 844 { 845 846 /* 847 * Create threads to call back and finish configuration for 848 * devices that want the mounted root file system. 849 */ 850 config_create_mountrootthreads(); 851 852 /* Get the threads going and into any sleeps before continuing. */ 853 yield(); 854 } 855 856 static void 857 rootconf_handle_wedges(void) 858 { 859 struct disklabel label; 860 struct partition *p; 861 struct vnode *vp; 862 daddr_t startblk; 863 uint64_t nblks; 864 device_t dev; 865 int error; 866 867 if (booted_nblks) { 868 /* 869 * bootloader passed geometry 870 */ 871 dev = booted_device; 872 startblk = booted_startblk; 873 nblks = booted_nblks; 874 875 /* 876 * keep booted_device and booted_partition 877 * in case the kernel doesn't identify a wedge 878 */ 879 } else { 880 /* 881 * bootloader passed partition number 882 * 883 * We cannot ask the partition device directly when it is 884 * covered by a wedge. Instead we look up the geometry in 885 * the disklabel. 886 */ 887 vp = opendisk(booted_device); 888 889 if (vp == NULL) 890 return; 891 892 VOP_UNLOCK(vp); 893 error = VOP_IOCTL(vp, DIOCGDINFO, &label, FREAD, NOCRED); 894 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); 895 VOP_CLOSE(vp, FREAD, NOCRED); 896 vput(vp); 897 if (error) 898 return; 899 900 KASSERT(booted_partition >= 0 901 && booted_partition < MAXPARTITIONS); 902 903 p = &label.d_partitions[booted_partition]; 904 905 dev = booted_device; 906 startblk = p->p_offset; 907 nblks = p->p_size; 908 } 909 910 dev = dkwedge_find_partition(dev, startblk, nblks); 911 if (dev != NULL) { 912 booted_device = dev; 913 booted_partition = 0; 914 } 915 } 916 917 void 918 rootconf(void) 919 { 920 if (booted_device != NULL) 921 rootconf_handle_wedges(); 922 923 setroot(booted_device, booted_partition); 924 } 925 926 static void 927 check_console(struct lwp *l) 928 { 929 struct vnode *vp; 930 int error; 931 932 error = namei_simple_kernel("/dev/console", 933 NSM_FOLLOW_NOEMULROOT, &vp); 934 if (error == 0) { 935 vrele(vp); 936 } else if (error == ENOENT) { 937 if (boothowto & (AB_VERBOSE|AB_DEBUG)) 938 printf("warning: no /dev/console\n"); 939 } else { 940 printf("warning: lookup /dev/console: error %d\n", error); 941 } 942 } 943 944 /* 945 * List of paths to try when searching for "init". 946 */ 947 static const char * const initpaths[] = { 948 "/sbin/init", 949 "/sbin/oinit", 950 "/sbin/init.bak", 951 "/rescue/init", 952 NULL, 953 }; 954 955 /* 956 * Start the initial user process; try exec'ing each pathname in "initpaths". 957 * The program is invoked with one argument containing the boot flags. 958 */ 959 static void 960 start_init(void *arg) 961 { 962 struct lwp *l = arg; 963 struct proc *p = l->l_proc; 964 vaddr_t addr; 965 struct sys_execve_args /* { 966 syscallarg(const char *) path; 967 syscallarg(char * const *) argp; 968 syscallarg(char * const *) envp; 969 } */ args; 970 int options, i, error; 971 register_t retval[2]; 972 char flags[4], *flagsp; 973 const char *path, *slash; 974 char *ucp, **uap, *arg0, *arg1, *argv[3]; 975 char ipath[129]; 976 int ipx, len; 977 978 /* 979 * Now in process 1. 980 */ 981 strncpy(p->p_comm, "init", MAXCOMLEN); 982 983 /* 984 * Wait for main() to tell us that it's safe to exec. 985 */ 986 mutex_enter(&proc_lock); 987 while (start_init_exec == 0) 988 cv_wait(&lbolt, &proc_lock); 989 mutex_exit(&proc_lock); 990 991 /* 992 * This is not the right way to do this. We really should 993 * hand-craft a descriptor onto /dev/console to hand to init, 994 * but that's a _lot_ more work, and the benefit from this easy 995 * hack makes up for the "good is the enemy of the best" effect. 996 */ 997 check_console(l); 998 999 /* 1000 * Need just enough stack to hold the faked-up "execve()" arguments. 1001 */ 1002 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 1003 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 1004 NULL, UVM_UNKNOWN_OFFSET, 0, 1005 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_COPY, 1006 UVM_ADV_NORMAL, 1007 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 1008 panic("init: couldn't allocate argument space"); 1009 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 1010 1011 ipx = 0; 1012 while (1) { 1013 if (boothowto & RB_ASKNAME) { 1014 printf("init path"); 1015 if (initpaths[ipx]) 1016 printf(" (default %s)", initpaths[ipx]); 1017 printf(": "); 1018 len = cngetsn(ipath, sizeof(ipath)-1); 1019 if (len == 4 && strcmp(ipath, "halt") == 0) { 1020 kern_reboot(RB_HALT, NULL); 1021 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 1022 kern_reboot(0, NULL); 1023 #if defined(DDB) 1024 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 1025 console_debugger(); 1026 continue; 1027 #endif 1028 } else if (len > 0 && ipath[0] == '/') { 1029 ipath[len] = '\0'; 1030 path = ipath; 1031 } else if (len == 0 && initpaths[ipx] != NULL) { 1032 path = initpaths[ipx++]; 1033 } else { 1034 printf("use absolute path, "); 1035 #if defined(DDB) 1036 printf("\"ddb\", "); 1037 #endif 1038 printf("\"halt\", or \"reboot\"\n"); 1039 continue; 1040 } 1041 } else { 1042 if ((path = initpaths[ipx++]) == NULL) { 1043 ipx = 0; 1044 boothowto |= RB_ASKNAME; 1045 continue; 1046 } 1047 } 1048 1049 ucp = (char *)USRSTACK; 1050 1051 /* 1052 * Construct the boot flag argument. 1053 */ 1054 flagsp = flags; 1055 *flagsp++ = '-'; 1056 options = 0; 1057 1058 if (boothowto & RB_SINGLE) { 1059 *flagsp++ = 's'; 1060 options = 1; 1061 } 1062 #ifdef notyet 1063 if (boothowto & RB_FASTBOOT) { 1064 *flagsp++ = 'f'; 1065 options = 1; 1066 } 1067 #endif 1068 1069 /* 1070 * Move out the flags (arg 1), if necessary. 1071 */ 1072 if (options != 0) { 1073 *flagsp++ = '\0'; 1074 i = flagsp - flags; 1075 #ifdef DEBUG 1076 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1077 #endif 1078 arg1 = STACK_ALLOC(ucp, i); 1079 ucp = STACK_MAX(arg1, i); 1080 if ((error = copyout((void *)flags, arg1, i)) != 0) 1081 goto copyerr; 1082 } else 1083 arg1 = NULL; 1084 1085 /* 1086 * Move out the file name (also arg 0). 1087 */ 1088 i = strlen(path) + 1; 1089 #ifdef DEBUG 1090 aprint_normal("init: copying out path `%s' %d\n", path, i); 1091 #else 1092 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1093 printf("init: trying %s\n", path); 1094 #endif 1095 arg0 = STACK_ALLOC(ucp, i); 1096 ucp = STACK_MAX(arg0, i); 1097 if ((error = copyout(path, arg0, i)) != 0) 1098 goto copyerr; 1099 1100 /* 1101 * Move out the arg pointers. 1102 */ 1103 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1104 uap = (char **)STACK_ALLOC(ucp, sizeof(argv)); 1105 SCARG(&args, path) = arg0; 1106 SCARG(&args, argp) = uap; 1107 SCARG(&args, envp) = NULL; 1108 slash = strrchr(path, '/'); 1109 1110 argv[0] = slash ? arg0 + (slash + 1 - path) : arg0; 1111 argv[1] = arg1; 1112 argv[2] = NULL; 1113 if ((error = copyout(argv, uap, sizeof(argv))) != 0) 1114 goto copyerr; 1115 1116 /* 1117 * Now try to exec the program. If it can't for any reason 1118 * other than it doesn't exist, complain. 1119 */ 1120 error = sys_execve(l, &args, retval); 1121 if (error == 0 || error == EJUSTRETURN) { 1122 KERNEL_UNLOCK_LAST(l); 1123 return; 1124 } 1125 printf("exec %s: error %d\n", path, error); 1126 } 1127 printf("init: not found\n"); 1128 panic("no init"); 1129 copyerr: 1130 panic("copyout %d", error); 1131 } 1132 1133 /* 1134 * calculate cache size (in bytes) from physmem and vsize. 1135 */ 1136 vaddr_t 1137 calc_cache_size(vsize_t vsize, int pct, int va_pct) 1138 { 1139 paddr_t t; 1140 1141 /* XXX should consider competing cache if any */ 1142 /* XXX should consider submaps */ 1143 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1144 if (vsize != 0) { 1145 vsize = (uintmax_t)vsize * va_pct / 100; 1146 if (t > vsize) { 1147 t = vsize; 1148 } 1149 } 1150 return t; 1151 } 1152 1153 /* 1154 * Print the system start up banner. 1155 * 1156 * - Print a limited banner if AB_SILENT. 1157 * - Always send normal banner to the log. 1158 */ 1159 #define MEM_PBUFSIZE sizeof("99999 MB") 1160 1161 void 1162 banner(void) 1163 { 1164 static char notice[] = " Notice: this software is " 1165 "protected by copyright"; 1166 char pbuf[81]; 1167 void (*pr)(const char *, ...) __printflike(1, 2); 1168 int i; 1169 1170 if ((boothowto & AB_SILENT) != 0) { 1171 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1172 ostype, osrelease, kernel_ident); 1173 printf_nolog("%s", pbuf); 1174 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1175 printf(" "); 1176 printf_nolog("%s\n", notice); 1177 pr = aprint_normal; 1178 } else { 1179 pr = printf; 1180 } 1181 1182 memset(pbuf, 0, sizeof(pbuf)); 1183 (*pr)("%s%s", copyright, version); 1184 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1185 (*pr)("total memory = %s\n", pbuf); 1186 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvm_availmem(false))); 1187 (*pr)("avail memory = %s\n", pbuf); 1188 } 1189