1 /* $NetBSD: init_main.c,v 1.506 2019/10/03 22:29:17 kamil Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 31 * The Regents of the University of California. All rights reserved. 32 * (c) UNIX System Laboratories, Inc. 33 * All or some portions of this file are derived from material licensed 34 * to the University of California by American Telephone and Telegraph 35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36 * the permission of UNIX System Laboratories, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 63 */ 64 65 /* 66 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by the University of 79 * California, Berkeley and its contributors. 80 * 4. Neither the name of the University nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 97 */ 98 99 #include <sys/cdefs.h> 100 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.506 2019/10/03 22:29:17 kamil Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_inet.h" 104 #include "opt_ipsec.h" 105 #include "opt_modular.h" 106 #include "opt_ntp.h" 107 #include "opt_pipe.h" 108 #include "opt_syscall_debug.h" 109 #include "opt_sysv.h" 110 #include "opt_fileassoc.h" 111 #include "opt_ktrace.h" 112 #include "opt_pax.h" 113 #include "opt_compat_netbsd.h" 114 #include "opt_wapbl.h" 115 #include "opt_ptrace.h" 116 #include "opt_rnd_printf.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/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/event.h> 174 #include <sys/lockf.h> 175 #include <sys/once.h> 176 #include <sys/kcpuset.h> 177 #include <sys/ksyms.h> 178 #include <sys/uidinfo.h> 179 #include <sys/kprintf.h> 180 #include <sys/bufq.h> 181 #include <sys/threadpool.h> 182 #ifdef IPSEC 183 #include <netipsec/ipsec.h> 184 #endif 185 #include <sys/domain.h> 186 #include <sys/namei.h> 187 #include <sys/rnd.h> 188 #include <sys/pipe.h> 189 #if NVERIEXEC > 0 190 #include <sys/verified_exec.h> 191 #endif /* NVERIEXEC > 0 */ 192 #ifdef KTRACE 193 #include <sys/ktrace.h> 194 #endif 195 #include <sys/kauth.h> 196 #include <net80211/ieee80211_netbsd.h> 197 #include <sys/cprng.h> 198 #include <sys/psref.h> 199 200 #include <sys/syscall.h> 201 #include <sys/syscallargs.h> 202 203 #include <sys/pax.h> 204 205 #include <secmodel/secmodel.h> 206 207 #include <ufs/ufs/quota.h> 208 209 #include <miscfs/genfs/genfs.h> 210 #include <miscfs/specfs/specdev.h> 211 212 #include <sys/cpu.h> 213 214 #include <uvm/uvm.h> /* extern struct uvm uvm */ 215 216 #include <dev/cons.h> 217 #include <dev/splash/splash.h> 218 219 #include <net/bpf.h> 220 #include <net/if.h> 221 #include <net/pfil.h> 222 #include <net/raw_cb.h> 223 #include <net/if_llatbl.h> 224 225 #include <prop/proplib.h> 226 227 #include <sys/userconf.h> 228 229 extern struct lwp lwp0; 230 extern time_t rootfstime; 231 232 #ifndef curlwp 233 struct lwp *curlwp = &lwp0; 234 #endif 235 struct proc *initproc; 236 237 struct vnode *rootvp, *swapdev_vp; 238 int boothowto; 239 int cold __read_mostly = 1; /* still working on startup */ 240 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 241 242 int start_init_exec; /* semaphore for start_init() */ 243 244 cprng_strong_t *kern_cprng; 245 246 static void check_console(struct lwp *l); 247 static void start_init(void *); 248 static void configure(void); 249 static void configure2(void); 250 static void configure3(void); 251 void main(void); 252 253 /* 254 * System startup; initialize the world, create process 0, mount root 255 * filesystem, and fork to create init and pagedaemon. Most of the 256 * hard work is done in the lower-level initialization routines including 257 * startup(), which does memory initialization and autoconfiguration. 258 */ 259 void 260 main(void) 261 { 262 struct timespec time; 263 struct lwp *l; 264 struct proc *p; 265 int s, error; 266 #ifdef NVNODE_IMPLICIT 267 int usevnodes; 268 #endif 269 CPU_INFO_ITERATOR cii; 270 struct cpu_info *ci; 271 272 #ifdef DIAGNOSTIC 273 /* 274 * Verify that CPU_INFO_FOREACH() knows about the boot CPU 275 * and only the boot CPU at this point. 276 */ 277 int cpucount = 0; 278 for (CPU_INFO_FOREACH(cii, ci)) { 279 KASSERT(ci == curcpu()); 280 cpucount++; 281 } 282 KASSERT(cpucount == 1); 283 #endif 284 285 l = &lwp0; 286 #ifndef LWP0_CPU_INFO 287 l->l_cpu = curcpu(); 288 #endif 289 l->l_pflag |= LP_RUNNING; 290 291 /* 292 * Attempt to find console and initialize 293 * in case of early panic or other messages. 294 */ 295 consinit(); 296 297 kernel_lock_init(); 298 once_init(); 299 300 mi_cpu_init(); 301 kernconfig_lock_init(); 302 kthread_sysinit(); 303 304 /* Initialize the device switch tables. */ 305 devsw_init(); 306 307 /* Initialize event counters. */ 308 evcnt_init(); 309 310 uvm_init(); 311 ubchist_init(); 312 kcpuset_sysinit(); 313 314 prop_kern_init(); 315 316 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 317 ksyms_init(); 318 #endif 319 kprintf_init(); 320 321 percpu_init(); 322 323 /* Initialize lock caches. */ 324 mutex_obj_init(); 325 rw_obj_init(); 326 327 /* Passive serialization. */ 328 pserialize_init(); 329 330 /* Initialize the extent manager. */ 331 extent_init(); 332 333 /* Do machine-dependent initialization. */ 334 cpu_startup(); 335 336 /* Initialize the sysctl subsystem. */ 337 sysctl_init(); 338 339 /* Initialize callouts, part 1. */ 340 callout_startup(); 341 342 /* Initialize the kernel authorization subsystem. */ 343 kauth_init(); 344 345 secmodel_init(); 346 347 spec_init(); 348 349 /* 350 * Set BPF op vector. Can't do this in bpf attach, since 351 * network drivers attach before bpf. 352 */ 353 bpf_setops(); 354 355 /* Start module system. */ 356 module_init(); 357 358 /* 359 * Initialize the kernel authorization subsystem and start the 360 * default security model, if any. We need to do this early 361 * enough so that subsystems relying on any of the aforementioned 362 * can work properly. Since the security model may dictate the 363 * credential inheritance policy, it is needed at least before 364 * any process is created, specifically proc0. 365 */ 366 module_init_class(MODULE_CLASS_SECMODEL); 367 368 /* Initialize the buffer cache */ 369 bufinit(); 370 biohist_init(); 371 372 #ifdef KERNHIST 373 sysctl_kernhist_init(); 374 #endif 375 376 377 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_IMAGE) 378 size_t splash_size = (&_binary_splash_image_end - 379 &_binary_splash_image_start) * sizeof(void *); 380 splash_setimage(&_binary_splash_image_start, splash_size); 381 #endif 382 383 /* Initialize sockets. */ 384 soinit(); 385 386 /* 387 * The following things must be done before autoconfiguration. 388 */ 389 rnd_init(); /* initialize entropy pool */ 390 391 cprng_init(); /* initialize cryptographic PRNG */ 392 393 /* Initialize process and pgrp structures. */ 394 procinit(); 395 lwpinit(); 396 397 /* Must be called after lwpinit (lwpinit_specificdata) */ 398 psref_init(); 399 400 /* Initialize signal-related data structures. */ 401 signal_init(); 402 403 /* Initialize resource management. */ 404 resource_init(); 405 406 /* Create process 0. */ 407 proc0_init(); 408 lwp0_init(); 409 410 /* Disable preemption during boot. */ 411 kpreempt_disable(); 412 413 /* Initialize the threadpool system. */ 414 threadpools_init(); 415 416 /* Initialize the UID hash table. */ 417 uid_init(); 418 419 /* Charge root for one process. */ 420 (void)chgproccnt(0, 1); 421 422 /* Initialize timekeeping. */ 423 time_init(); 424 425 /* Initialize the run queues, turnstiles and sleep queues. */ 426 sched_rqinit(); 427 turnstile_init(); 428 sleeptab_init(&sleeptab); 429 430 sched_init(); 431 432 /* Initialize processor-sets */ 433 psets_init(); 434 435 /* Initialize cpufreq(9) */ 436 cpufreq_init(); 437 438 /* MI initialization of the boot cpu */ 439 error = mi_cpu_attach(curcpu()); 440 KASSERT(error == 0); 441 442 /* Initialize timekeeping, part 2. */ 443 time_init2(); 444 445 /* 446 * Initialize mbuf's. Do this now because we might attempt to 447 * allocate mbufs or mbuf clusters during autoconfiguration. 448 */ 449 mbinit(); 450 451 /* Initialize I/O statistics. */ 452 iostat_init(); 453 454 /* Initialize the log device. */ 455 loginit(); 456 457 /* Second part of module system initialization. */ 458 module_start_unload_thread(); 459 460 /* Initialize the file systems. */ 461 #ifdef NVNODE_IMPLICIT 462 /* 463 * If maximum number of vnodes in namei vnode cache is not explicitly 464 * defined in kernel config, adjust the number such as we use roughly 465 * 10% of memory for vnodes and associated data structures in the 466 * assumed worst case. Do not provide fewer than NVNODE vnodes. 467 */ 468 usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 469 10, VNODE_KMEM_MAXPCT) / VNODE_COST; 470 if (usevnodes > desiredvnodes) 471 desiredvnodes = usevnodes; 472 #endif 473 474 /* Initialize fstrans. */ 475 fstrans_init(); 476 477 vfsinit(); 478 lf_init(); 479 480 /* Initialize the file descriptor system. */ 481 fd_sys_init(); 482 483 /* Initialize cwd structures */ 484 cwd_sys_init(); 485 486 /* Initialize kqueue. */ 487 kqueue_init(); 488 489 inittimecounter(); 490 ntp_init(); 491 492 /* Initialize tty subsystem. */ 493 tty_init(); 494 ttyldisc_init(); 495 496 /* Initialize the buffer cache, part 2. */ 497 bufinit2(); 498 499 /* Initialize the disk wedge subsystem. */ 500 dkwedge_init(); 501 502 /* Initialize the kernel strong PRNG. */ 503 kern_cprng = cprng_strong_create("kernel", IPL_VM, 504 CPRNG_INIT_ANY|CPRNG_REKEY_ANY); 505 506 /* Initialize pfil */ 507 pfil_init(); 508 509 /* Initialize interfaces. */ 510 ifinit1(); 511 512 spldebug_start(); 513 514 /* Initialize sockets thread(s) */ 515 soinit1(); 516 517 /* 518 * Initialize the bufq strategy sub-system and any built-in 519 * strategy modules - they may be needed by some devices during 520 * auto-configuration 521 */ 522 bufq_init(); 523 module_init_class(MODULE_CLASS_BUFQ); 524 525 /* Configure the system hardware. This will enable interrupts. */ 526 configure(); 527 528 /* Once all CPUs are detected, initialize the per-CPU cprng_fast. */ 529 cprng_fast_init(); 530 531 ssp_init(); 532 533 ubc_init(); /* must be after autoconfig */ 534 535 mm_init(); 536 537 configure2(); 538 539 ipi_sysinit(); 540 541 /* Now timer is working. Enable preemption. */ 542 kpreempt_enable(); 543 544 /* Get the threads going and into any sleeps before continuing. */ 545 yield(); 546 547 /* Enable deferred processing of RNG samples */ 548 rnd_init_softint(); 549 550 #ifdef RND_PRINTF 551 /* Enable periodic injection of console output into entropy pool */ 552 kprintf_init_callout(); 553 #endif 554 555 vmem_rehash_start(); /* must be before exec_init */ 556 557 /* Initialize exec structures */ 558 exec_init(1); /* seminit calls exithook_establish() */ 559 560 #if NVERIEXEC > 0 561 /* 562 * Initialise the Veriexec subsystem. 563 */ 564 veriexec_init(); 565 #endif /* NVERIEXEC > 0 */ 566 567 pax_init(); 568 569 #ifdef IPSEC 570 /* Attach network crypto subsystem */ 571 ipsec_attach(); 572 #endif 573 574 /* 575 * Initialize protocols. Block reception of incoming packets 576 * until everything is ready. 577 */ 578 s = splnet(); 579 ifinit(); 580 #if defined(INET) || defined(INET6) 581 lltableinit(); 582 #endif 583 domaininit(true); 584 ifinit_post(); 585 if_attachdomain(); 586 splx(s); 587 588 #ifdef GPROF 589 /* Initialize kernel profiling. */ 590 kmstartup(); 591 #endif 592 593 /* Initialize system accounting. */ 594 acct_init(); 595 596 #ifndef PIPE_SOCKETPAIR 597 /* Initialize pipes. */ 598 pipe_init(); 599 #endif 600 601 #ifdef KTRACE 602 /* Initialize ktrace. */ 603 ktrinit(); 604 #endif 605 606 machdep_init(); 607 608 procinit_sysctl(); 609 610 scdebug_init(); 611 612 /* 613 * Create process 1 (init(8)). We do this now, as Unix has 614 * historically had init be process 1, and changing this would 615 * probably upset a lot of people. 616 * 617 * Note that process 1 won't immediately exec init(8), but will 618 * wait for us to inform it that the root file system has been 619 * mounted. 620 */ 621 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL)) 622 panic("fork init"); 623 624 /* 625 * The initproc variable cannot be initialized in start_init as there 626 * is a race between vfs_mountroot and start_init. 627 */ 628 mutex_enter(proc_lock); 629 initproc = proc_find_raw(1); 630 mutex_exit(proc_lock); 631 632 /* 633 * Load any remaining builtin modules, and hand back temporary 634 * storage to the VM system. Then require force when loading any 635 * remaining un-init'ed built-in modules to avoid later surprises. 636 */ 637 module_init_class(MODULE_CLASS_ANY); 638 module_builtin_require_force(); 639 640 /* 641 * Finalize configuration now that all real devices have been 642 * found. This needs to be done before the root device is 643 * selected, since finalization may create the root device. 644 */ 645 config_finalize(); 646 647 sysctl_finalize(); 648 649 /* 650 * Now that autoconfiguration has completed, we can determine 651 * the root and dump devices. 652 */ 653 cpu_rootconf(); 654 cpu_dumpconf(); 655 656 /* Mount the root file system. */ 657 do { 658 domountroothook(root_device); 659 if ((error = vfs_mountroot())) { 660 printf("cannot mount root, error = %d\n", error); 661 boothowto |= RB_ASKNAME; 662 setroot(root_device, 663 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 664 } 665 } while (error != 0); 666 mountroothook_destroy(); 667 668 configure3(); 669 670 /* 671 * Initialise the time-of-day clock, passing the time recorded 672 * in the root filesystem (if any) for use by systems that 673 * don't have a non-volatile time-of-day device. 674 */ 675 inittodr(rootfstime); 676 677 /* 678 * Now can look at time, having had a chance to verify the time 679 * from the file system. Reset l->l_rtime as it may have been 680 * munched in mi_switch() after the time got set. 681 */ 682 getnanotime(&time); 683 { 684 struct timespec ut; 685 /* 686 * was: 687 * boottime = time; 688 * but we can do better 689 */ 690 nanouptime(&ut); 691 timespecsub(&time, &ut, &boottime); 692 } 693 694 mutex_enter(proc_lock); 695 LIST_FOREACH(p, &allproc, p_list) { 696 KASSERT((p->p_flag & PK_MARKER) == 0); 697 mutex_enter(p->p_lock); 698 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 699 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 700 lwp_lock(l); 701 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 702 lwp_unlock(l); 703 } 704 mutex_exit(p->p_lock); 705 } 706 mutex_exit(proc_lock); 707 binuptime(&curlwp->l_stime); 708 709 for (CPU_INFO_FOREACH(cii, ci)) { 710 ci->ci_schedstate.spc_lastmod = time_second; 711 } 712 713 /* Create the pageout daemon kernel thread. */ 714 uvm_swap_init(); 715 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 716 NULL, NULL, "pgdaemon")) 717 panic("fork pagedaemon"); 718 719 /* Create the filesystem syncer kernel thread. */ 720 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 721 NULL, NULL, "ioflush")) 722 panic("fork syncer"); 723 724 /* Create the aiodone daemon kernel thread. */ 725 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 726 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 727 panic("fork aiodoned"); 728 729 /* Wait for final configure threads to complete. */ 730 config_finalize_mountroot(); 731 732 /* 733 * Okay, now we can let init(8) exec! It's off to userland! 734 */ 735 mutex_enter(proc_lock); 736 start_init_exec = 1; 737 cv_broadcast(&lbolt); 738 mutex_exit(proc_lock); 739 740 /* The scheduler is an infinite loop. */ 741 uvm_scheduler(); 742 /* NOTREACHED */ 743 } 744 745 /* 746 * Configure the system's hardware. 747 */ 748 static void 749 configure(void) 750 { 751 752 /* Initialize autoconf data structures. */ 753 config_init_mi(); 754 /* 755 * XXX 756 * callout_setfunc() requires mutex(9) so it can't be in config_init() 757 * on amiga and atari which use config_init() and autoconf(9) fucntions 758 * to initialize console devices. 759 */ 760 config_twiddle_init(); 761 762 pmf_init(); 763 764 /* Initialize driver modules */ 765 module_init_class(MODULE_CLASS_DRIVER); 766 767 userconf_init(); 768 if (boothowto & RB_USERCONF) 769 userconf_prompt(); 770 771 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 772 printf_nolog("Detecting hardware..."); 773 } 774 775 /* 776 * Do the machine-dependent portion of autoconfiguration. This 777 * sets the configuration machinery here in motion by "finding" 778 * the root bus. When this function returns, we expect interrupts 779 * to be enabled. 780 */ 781 cpu_configure(); 782 } 783 784 static void 785 configure2(void) 786 { 787 CPU_INFO_ITERATOR cii; 788 struct cpu_info *ci; 789 int s; 790 791 /* 792 * Now that we've found all the hardware, start the real time 793 * and statistics clocks. 794 */ 795 initclocks(); 796 797 cold = 0; /* clocks are running, we're warm now! */ 798 s = splsched(); 799 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 800 splx(s); 801 802 /* Boot the secondary processors. */ 803 for (CPU_INFO_FOREACH(cii, ci)) { 804 uvm_cpu_attach(ci); 805 } 806 mp_online = true; 807 #if defined(MULTIPROCESSOR) 808 cpu_boot_secondary_processors(); 809 #endif 810 811 /* Setup the runqueues and scheduler. */ 812 runq_init(); 813 synch_init(); 814 815 /* 816 * Bus scans can make it appear as if the system has paused, so 817 * twiddle constantly while config_interrupts() jobs are running. 818 */ 819 config_twiddle_fn(NULL); 820 821 /* 822 * Create threads to call back and finish configuration for 823 * devices that want interrupts enabled. 824 */ 825 config_create_interruptthreads(); 826 } 827 828 static void 829 configure3(void) 830 { 831 832 /* 833 * Create threads to call back and finish configuration for 834 * devices that want the mounted root file system. 835 */ 836 config_create_mountrootthreads(); 837 838 /* Get the threads going and into any sleeps before continuing. */ 839 yield(); 840 } 841 842 static void 843 rootconf_handle_wedges(void) 844 { 845 struct disklabel label; 846 struct partition *p; 847 struct vnode *vp; 848 daddr_t startblk; 849 uint64_t nblks; 850 device_t dev; 851 int error; 852 853 if (booted_nblks) { 854 /* 855 * bootloader passed geometry 856 */ 857 dev = booted_device; 858 startblk = booted_startblk; 859 nblks = booted_nblks; 860 861 /* 862 * keep booted_device and booted_partition 863 * in case the kernel doesn't identify a wedge 864 */ 865 } else { 866 /* 867 * bootloader passed partition number 868 * 869 * We cannot ask the partition device directly when it is 870 * covered by a wedge. Instead we look up the geometry in 871 * the disklabel. 872 */ 873 vp = opendisk(booted_device); 874 875 if (vp == NULL) 876 return; 877 878 error = VOP_IOCTL(vp, DIOCGDINFO, &label, FREAD, NOCRED); 879 VOP_CLOSE(vp, FREAD, NOCRED); 880 vput(vp); 881 if (error) 882 return; 883 884 KASSERT(booted_partition >= 0 885 && booted_partition < MAXPARTITIONS); 886 887 p = &label.d_partitions[booted_partition]; 888 889 dev = booted_device; 890 startblk = p->p_offset; 891 nblks = p->p_size; 892 } 893 894 dev = dkwedge_find_partition(dev, startblk, nblks); 895 if (dev != NULL) { 896 booted_device = dev; 897 booted_partition = 0; 898 } 899 } 900 901 void 902 rootconf(void) 903 { 904 if (booted_device != NULL) 905 rootconf_handle_wedges(); 906 907 setroot(booted_device, booted_partition); 908 } 909 910 static void 911 check_console(struct lwp *l) 912 { 913 struct vnode *vp; 914 int error; 915 916 error = namei_simple_kernel("/dev/console", 917 NSM_FOLLOW_NOEMULROOT, &vp); 918 if (error == 0) { 919 vrele(vp); 920 } else if (error == ENOENT) { 921 if (boothowto & (AB_VERBOSE|AB_DEBUG)) 922 printf("warning: no /dev/console\n"); 923 } else { 924 printf("warning: lookup /dev/console: error %d\n", error); 925 } 926 } 927 928 /* 929 * List of paths to try when searching for "init". 930 */ 931 static const char * const initpaths[] = { 932 "/sbin/init", 933 "/sbin/oinit", 934 "/sbin/init.bak", 935 "/rescue/init", 936 NULL, 937 }; 938 939 /* 940 * Start the initial user process; try exec'ing each pathname in "initpaths". 941 * The program is invoked with one argument containing the boot flags. 942 */ 943 static void 944 start_init(void *arg) 945 { 946 struct lwp *l = arg; 947 struct proc *p = l->l_proc; 948 vaddr_t addr; 949 struct sys_execve_args /* { 950 syscallarg(const char *) path; 951 syscallarg(char * const *) argp; 952 syscallarg(char * const *) envp; 953 } */ args; 954 int options, i, error; 955 register_t retval[2]; 956 char flags[4], *flagsp; 957 const char *path, *slash; 958 char *ucp, **uap, *arg0, *arg1, *argv[3]; 959 char ipath[129]; 960 int ipx, len; 961 962 /* 963 * Now in process 1. 964 */ 965 strncpy(p->p_comm, "init", MAXCOMLEN); 966 967 /* 968 * Wait for main() to tell us that it's safe to exec. 969 */ 970 mutex_enter(proc_lock); 971 while (start_init_exec == 0) 972 cv_wait(&lbolt, proc_lock); 973 mutex_exit(proc_lock); 974 975 /* 976 * This is not the right way to do this. We really should 977 * hand-craft a descriptor onto /dev/console to hand to init, 978 * but that's a _lot_ more work, and the benefit from this easy 979 * hack makes up for the "good is the enemy of the best" effect. 980 */ 981 check_console(l); 982 983 /* 984 * Need just enough stack to hold the faked-up "execve()" arguments. 985 */ 986 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 987 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 988 NULL, UVM_UNKNOWN_OFFSET, 0, 989 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_RW, UVM_INH_COPY, 990 UVM_ADV_NORMAL, 991 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 992 panic("init: couldn't allocate argument space"); 993 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 994 995 ipx = 0; 996 while (1) { 997 if (boothowto & RB_ASKNAME) { 998 printf("init path"); 999 if (initpaths[ipx]) 1000 printf(" (default %s)", initpaths[ipx]); 1001 printf(": "); 1002 len = cngetsn(ipath, sizeof(ipath)-1); 1003 if (len == 4 && strcmp(ipath, "halt") == 0) { 1004 cpu_reboot(RB_HALT, NULL); 1005 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 1006 cpu_reboot(0, NULL); 1007 #if defined(DDB) 1008 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 1009 console_debugger(); 1010 continue; 1011 #endif 1012 } else if (len > 0 && ipath[0] == '/') { 1013 ipath[len] = '\0'; 1014 path = ipath; 1015 } else if (len == 0 && initpaths[ipx] != NULL) { 1016 path = initpaths[ipx++]; 1017 } else { 1018 printf("use absolute path, "); 1019 #if defined(DDB) 1020 printf("\"ddb\", "); 1021 #endif 1022 printf("\"halt\", or \"reboot\"\n"); 1023 continue; 1024 } 1025 } else { 1026 if ((path = initpaths[ipx++]) == NULL) { 1027 ipx = 0; 1028 boothowto |= RB_ASKNAME; 1029 continue; 1030 } 1031 } 1032 1033 ucp = (char *)USRSTACK; 1034 1035 /* 1036 * Construct the boot flag argument. 1037 */ 1038 flagsp = flags; 1039 *flagsp++ = '-'; 1040 options = 0; 1041 1042 if (boothowto & RB_SINGLE) { 1043 *flagsp++ = 's'; 1044 options = 1; 1045 } 1046 #ifdef notyet 1047 if (boothowto & RB_FASTBOOT) { 1048 *flagsp++ = 'f'; 1049 options = 1; 1050 } 1051 #endif 1052 1053 /* 1054 * Move out the flags (arg 1), if necessary. 1055 */ 1056 if (options != 0) { 1057 *flagsp++ = '\0'; 1058 i = flagsp - flags; 1059 #ifdef DEBUG 1060 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1061 #endif 1062 arg1 = STACK_ALLOC(ucp, i); 1063 ucp = STACK_MAX(arg1, i); 1064 if ((error = copyout((void *)flags, arg1, i)) != 0) 1065 goto copyerr; 1066 } else 1067 arg1 = NULL; 1068 1069 /* 1070 * Move out the file name (also arg 0). 1071 */ 1072 i = strlen(path) + 1; 1073 #ifdef DEBUG 1074 aprint_normal("init: copying out path `%s' %d\n", path, i); 1075 #else 1076 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1077 printf("init: trying %s\n", path); 1078 #endif 1079 arg0 = STACK_ALLOC(ucp, i); 1080 ucp = STACK_MAX(arg0, i); 1081 if ((error = copyout(path, arg0, i)) != 0) 1082 goto copyerr; 1083 1084 /* 1085 * Move out the arg pointers. 1086 */ 1087 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1088 uap = (char **)STACK_ALLOC(ucp, sizeof(argv)); 1089 SCARG(&args, path) = arg0; 1090 SCARG(&args, argp) = uap; 1091 SCARG(&args, envp) = NULL; 1092 slash = strrchr(path, '/'); 1093 1094 argv[0] = slash ? arg0 + (slash + 1 - path) : arg0; 1095 argv[1] = arg1; 1096 argv[2] = NULL; 1097 if ((error = copyout(argv, uap, sizeof(argv))) != 0) 1098 goto copyerr; 1099 1100 /* 1101 * Now try to exec the program. If it can't for any reason 1102 * other than it doesn't exist, complain. 1103 */ 1104 error = sys_execve(l, &args, retval); 1105 if (error == 0 || error == EJUSTRETURN) { 1106 KERNEL_UNLOCK_LAST(l); 1107 return; 1108 } 1109 printf("exec %s: error %d\n", path, error); 1110 } 1111 printf("init: not found\n"); 1112 panic("no init"); 1113 copyerr: 1114 panic("copyout %d", error); 1115 } 1116 1117 /* 1118 * calculate cache size (in bytes) from physmem and vsize. 1119 */ 1120 vaddr_t 1121 calc_cache_size(vsize_t vsize, int pct, int va_pct) 1122 { 1123 paddr_t t; 1124 1125 /* XXX should consider competing cache if any */ 1126 /* XXX should consider submaps */ 1127 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1128 if (vsize != 0) { 1129 vsize = (uintmax_t)vsize * va_pct / 100; 1130 if (t > vsize) { 1131 t = vsize; 1132 } 1133 } 1134 return t; 1135 } 1136 1137 /* 1138 * Print the system start up banner. 1139 * 1140 * - Print a limited banner if AB_SILENT. 1141 * - Always send normal banner to the log. 1142 */ 1143 #define MEM_PBUFSIZE sizeof("99999 MB") 1144 1145 void 1146 banner(void) 1147 { 1148 static char notice[] = " Notice: this software is " 1149 "protected by copyright"; 1150 char pbuf[81]; 1151 void (*pr)(const char *, ...) __printflike(1, 2); 1152 int i; 1153 1154 if ((boothowto & AB_SILENT) != 0) { 1155 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1156 ostype, osrelease, kernel_ident); 1157 printf_nolog("%s", pbuf); 1158 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1159 printf(" "); 1160 printf_nolog("%s\n", notice); 1161 pr = aprint_normal; 1162 } else { 1163 pr = printf; 1164 } 1165 1166 memset(pbuf, 0, sizeof(pbuf)); 1167 (*pr)("%s%s", copyright, version); 1168 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1169 (*pr)("total memory = %s\n", pbuf); 1170 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1171 (*pr)("avail memory = %s\n", pbuf); 1172 } 1173