1 /* $NetBSD: init_main.c,v 1.471 2015/10/17 13:52:52 jmcneill 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 1.471 2015/10/17 13:52:52 jmcneill Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_ipsec.h" 104 #include "opt_modular.h" 105 #include "opt_ntp.h" 106 #include "opt_pipe.h" 107 #include "opt_syscall_debug.h" 108 #include "opt_sysv.h" 109 #include "opt_fileassoc.h" 110 #include "opt_ktrace.h" 111 #include "opt_pax.h" 112 #include "opt_compat_netbsd.h" 113 #include "opt_wapbl.h" 114 #include "opt_ptrace.h" 115 #include "opt_rnd_printf.h" 116 #include "opt_splash.h" 117 118 #if defined(SPLASHSCREEN) && defined(makeoptions_SPLASHSCREEN_IMAGE) 119 extern void *_binary_splash_image_start; 120 extern void *_binary_splash_image_end; 121 #endif 122 123 #include "drvctl.h" 124 #include "ether.h" 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/kthread.h> 142 #include <sys/resourcevar.h> 143 #include <sys/signalvar.h> 144 #include <sys/systm.h> 145 #include <sys/vnode.h> 146 #include <sys/fstrans.h> 147 #include <sys/tty.h> 148 #include <sys/conf.h> 149 #include <sys/disklabel.h> 150 #include <sys/buf.h> 151 #include <sys/device.h> 152 #include <sys/exec.h> 153 #include <sys/socketvar.h> 154 #include <sys/protosw.h> 155 #include <sys/percpu.h> 156 #include <sys/pserialize.h> 157 #include <sys/pset.h> 158 #include <sys/sysctl.h> 159 #include <sys/reboot.h> 160 #include <sys/event.h> 161 #include <sys/mbuf.h> 162 #include <sys/sched.h> 163 #include <sys/sleepq.h> 164 #include <sys/ipi.h> 165 #include <sys/iostat.h> 166 #include <sys/vmem.h> 167 #include <sys/uuid.h> 168 #include <sys/extent.h> 169 #include <sys/disk.h> 170 #include <sys/msgbuf.h> 171 #include <sys/module.h> 172 #include <sys/event.h> 173 #include <sys/lockf.h> 174 #include <sys/once.h> 175 #include <sys/kcpuset.h> 176 #include <sys/ksyms.h> 177 #include <sys/uidinfo.h> 178 #include <sys/kprintf.h> 179 #ifdef IPSEC 180 #include <netipsec/ipsec.h> 181 #endif 182 #ifdef SYSVSHM 183 #include <sys/shm.h> 184 #endif 185 #ifdef SYSVSEM 186 #include <sys/sem.h> 187 #endif 188 #ifdef SYSVMSG 189 #include <sys/msg.h> 190 #endif 191 #include <sys/domain.h> 192 #include <sys/namei.h> 193 #include <sys/rnd.h> 194 #include <sys/pipe.h> 195 #if NVERIEXEC > 0 196 #include <sys/verified_exec.h> 197 #endif /* NVERIEXEC > 0 */ 198 #ifdef KTRACE 199 #include <sys/ktrace.h> 200 #endif 201 #include <sys/kauth.h> 202 #include <net80211/ieee80211_netbsd.h> 203 #ifdef PTRACE 204 #include <sys/ptrace.h> 205 #endif /* PTRACE */ 206 #include <sys/cprng.h> 207 208 #include <sys/syscall.h> 209 #include <sys/syscallargs.h> 210 211 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 212 #include <sys/pax.h> 213 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 214 215 #include <secmodel/secmodel.h> 216 217 #include <ufs/ufs/quota.h> 218 219 #include <miscfs/genfs/genfs.h> 220 #include <miscfs/specfs/specdev.h> 221 222 #include <sys/cpu.h> 223 224 #include <uvm/uvm.h> /* extern struct uvm uvm */ 225 226 #include <dev/cons.h> 227 #include <dev/splash/splash.h> 228 229 #include <net/bpf.h> 230 #include <net/if.h> 231 #include <net/raw_cb.h> 232 #include <net/if_llatbl.h> 233 234 #include <prop/proplib.h> 235 236 #include <sys/userconf.h> 237 238 extern struct lwp lwp0; 239 extern time_t rootfstime; 240 241 #ifndef curlwp 242 struct lwp *curlwp = &lwp0; 243 #endif 244 struct proc *initproc; 245 246 struct vnode *rootvp, *swapdev_vp; 247 int boothowto; 248 int cold = 1; /* still working on startup */ 249 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 250 251 int start_init_exec; /* semaphore for start_init() */ 252 253 cprng_strong_t *kern_cprng; 254 255 static void check_console(struct lwp *l); 256 static void start_init(void *); 257 static void configure(void); 258 static void configure2(void); 259 static void configure3(void); 260 void main(void); 261 262 /* 263 * System startup; initialize the world, create process 0, mount root 264 * filesystem, and fork to create init and pagedaemon. Most of the 265 * hard work is done in the lower-level initialization routines including 266 * startup(), which does memory initialization and autoconfiguration. 267 */ 268 void 269 main(void) 270 { 271 struct timespec time; 272 struct lwp *l; 273 struct proc *p; 274 int s, error; 275 #ifdef NVNODE_IMPLICIT 276 int usevnodes; 277 #endif 278 CPU_INFO_ITERATOR cii; 279 struct cpu_info *ci; 280 281 l = &lwp0; 282 #ifndef LWP0_CPU_INFO 283 l->l_cpu = curcpu(); 284 #endif 285 l->l_pflag |= LP_RUNNING; 286 287 /* 288 * Attempt to find console and initialize 289 * in case of early panic or other messages. 290 */ 291 consinit(); 292 293 kernel_lock_init(); 294 once_init(); 295 296 mi_cpu_init(); 297 kernconfig_lock_init(); 298 kthread_sysinit(); 299 300 /* Initialize the device switch tables. */ 301 devsw_init(); 302 303 /* Initialize event counters. */ 304 evcnt_init(); 305 306 uvm_init(); 307 ubchist_init(); 308 kcpuset_sysinit(); 309 310 prop_kern_init(); 311 312 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 313 ksyms_init(); 314 #endif 315 kprintf_init(); 316 317 percpu_init(); 318 319 /* Initialize lock caches. */ 320 mutex_obj_init(); 321 rw_obj_init(); 322 323 /* Passive serialization. */ 324 pserialize_init(); 325 326 /* Initialize the extent manager. */ 327 extent_init(); 328 329 /* Do machine-dependent initialization. */ 330 cpu_startup(); 331 332 /* Initialize the sysctl subsystem. */ 333 sysctl_init(); 334 335 /* Initialize callouts, part 1. */ 336 callout_startup(); 337 338 /* Initialize the kernel authorization subsystem. */ 339 kauth_init(); 340 341 secmodel_init(); 342 343 spec_init(); 344 345 /* 346 * Set BPF op vector. Can't do this in bpf attach, since 347 * network drivers attach before bpf. 348 */ 349 bpf_setops(); 350 351 /* Start module system. */ 352 module_init(); 353 354 /* 355 * Initialize the kernel authorization subsystem and start the 356 * default security model, if any. We need to do this early 357 * enough so that subsystems relying on any of the aforementioned 358 * can work properly. Since the security model may dictate the 359 * credential inheritance policy, it is needed at least before 360 * any process is created, specifically proc0. 361 */ 362 module_init_class(MODULE_CLASS_SECMODEL); 363 364 /* Initialize the buffer cache */ 365 bufinit(); 366 367 368 #if defined(SPLASHSCREEN) && defined(SPLASHSCREEN_IMAGE) 369 size_t splash_size = (&_binary_splash_image_end - 370 &_binary_splash_image_start) * sizeof(void *); 371 splash_setimage(&_binary_splash_image_start, splash_size); 372 #endif 373 374 /* Initialize sockets. */ 375 soinit(); 376 377 /* 378 * The following things must be done before autoconfiguration. 379 */ 380 rnd_init(); /* initialize entropy pool */ 381 382 cprng_init(); /* initialize cryptographic PRNG */ 383 384 /* Initialize process and pgrp structures. */ 385 procinit(); 386 lwpinit(); 387 388 /* Initialize signal-related data structures. */ 389 signal_init(); 390 391 /* Initialize resource management. */ 392 resource_init(); 393 394 /* Create process 0. */ 395 proc0_init(); 396 lwp0_init(); 397 398 /* Disable preemption during boot. */ 399 kpreempt_disable(); 400 401 /* Initialize the UID hash table. */ 402 uid_init(); 403 404 /* Charge root for one process. */ 405 (void)chgproccnt(0, 1); 406 407 /* Initialize timekeeping. */ 408 time_init(); 409 410 /* Initialize the run queues, turnstiles and sleep queues. */ 411 sched_rqinit(); 412 turnstile_init(); 413 sleeptab_init(&sleeptab); 414 415 sched_init(); 416 417 /* Initialize processor-sets */ 418 psets_init(); 419 420 /* Initialize cpufreq(9) */ 421 cpufreq_init(); 422 423 /* MI initialization of the boot cpu */ 424 error = mi_cpu_attach(curcpu()); 425 KASSERT(error == 0); 426 427 /* Initialize timekeeping, part 2. */ 428 time_init2(); 429 430 /* 431 * Initialize mbuf's. Do this now because we might attempt to 432 * allocate mbufs or mbuf clusters during autoconfiguration. 433 */ 434 mbinit(); 435 436 /* Initialize I/O statistics. */ 437 iostat_init(); 438 439 /* Initialize the log device. */ 440 loginit(); 441 442 /* Second part of module system initialization. */ 443 module_start_unload_thread(); 444 445 /* Initialize the file systems. */ 446 #ifdef NVNODE_IMPLICIT 447 /* 448 * If maximum number of vnodes in namei vnode cache is not explicitly 449 * defined in kernel config, adjust the number such as we use roughly 450 * 10% of memory for vnodes and associated data structures in the 451 * assumed worst case. Do not provide fewer than NVNODE vnodes. 452 */ 453 usevnodes = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 454 10, VNODE_KMEM_MAXPCT) / VNODE_COST; 455 if (usevnodes > desiredvnodes) 456 desiredvnodes = usevnodes; 457 #endif 458 vfsinit(); 459 lf_init(); 460 461 /* Initialize fstrans. */ 462 fstrans_init(); 463 464 /* Initialize the file descriptor system. */ 465 fd_sys_init(); 466 467 /* Initialize cwd structures */ 468 cwd_sys_init(); 469 470 /* Initialize kqueue. */ 471 kqueue_init(); 472 473 inittimecounter(); 474 ntp_init(); 475 476 /* Initialize tty subsystem. */ 477 tty_init(); 478 ttyldisc_init(); 479 480 /* Initialize the buffer cache, part 2. */ 481 bufinit2(); 482 483 /* Initialize the disk wedge subsystem. */ 484 dkwedge_init(); 485 486 /* Initialize the kernel strong PRNG. */ 487 kern_cprng = cprng_strong_create("kernel", IPL_VM, 488 CPRNG_INIT_ANY|CPRNG_REKEY_ANY); 489 490 /* Initialize interfaces. */ 491 ifinit1(); 492 493 spldebug_start(); 494 495 /* Initialize sockets thread(s) */ 496 soinit1(); 497 498 /* Configure the system hardware. This will enable interrupts. */ 499 configure(); 500 501 /* Once all CPUs are detected, initialize the per-CPU cprng_fast. */ 502 cprng_fast_init(); 503 504 ssp_init(); 505 506 ubc_init(); /* must be after autoconfig */ 507 508 mm_init(); 509 510 configure2(); 511 512 ipi_sysinit(); 513 514 /* Now timer is working. Enable preemption. */ 515 kpreempt_enable(); 516 517 /* Get the threads going and into any sleeps before continuing. */ 518 yield(); 519 520 /* Enable deferred processing of RNG samples */ 521 rnd_init_softint(); 522 523 #ifdef RND_PRINTF 524 /* Enable periodic injection of console output into entropy pool */ 525 kprintf_init_callout(); 526 #endif 527 528 #ifdef SYSVSHM 529 /* Initialize System V style shared memory. */ 530 shminit(); 531 #endif 532 533 vmem_rehash_start(); /* must be before exec_init */ 534 535 /* Initialize exec structures */ 536 exec_init(1); /* seminit calls exithook_establish() */ 537 538 #ifdef SYSVSEM 539 /* Initialize System V style semaphores. */ 540 seminit(); 541 #endif 542 543 #ifdef SYSVMSG 544 /* Initialize System V style message queues. */ 545 msginit(); 546 #endif 547 548 #if NVERIEXEC > 0 549 /* 550 * Initialise the Veriexec subsystem. 551 */ 552 veriexec_init(); 553 #endif /* NVERIEXEC > 0 */ 554 555 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 556 pax_init(); 557 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 558 559 #ifdef IPSEC 560 /* Attach network crypto subsystem */ 561 ipsec_attach(); 562 #endif 563 564 /* 565 * Initialize protocols. Block reception of incoming packets 566 * until everything is ready. 567 */ 568 s = splnet(); 569 ifinit(); 570 #if NETHER > 0 571 lltableinit(); 572 #endif 573 domaininit(true); 574 if_attachdomain(); 575 splx(s); 576 577 #ifdef GPROF 578 /* Initialize kernel profiling. */ 579 kmstartup(); 580 #endif 581 582 /* Initialize system accounting. */ 583 acct_init(); 584 585 #ifndef PIPE_SOCKETPAIR 586 /* Initialize pipes. */ 587 pipe_init(); 588 #endif 589 590 #ifdef KTRACE 591 /* Initialize ktrace. */ 592 ktrinit(); 593 #endif 594 595 #ifdef PTRACE 596 /* Initialize ptrace. */ 597 ptrace_init(); 598 #endif /* PTRACE */ 599 600 machdep_init(); 601 602 procinit_sysctl(); 603 604 /* 605 * Create process 1 (init(8)). We do this now, as Unix has 606 * historically had init be process 1, and changing this would 607 * probably upset a lot of people. 608 * 609 * Note that process 1 won't immediately exec init(8), but will 610 * wait for us to inform it that the root file system has been 611 * mounted. 612 */ 613 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 614 panic("fork init"); 615 616 /* 617 * Load any remaining builtin modules, and hand back temporary 618 * storage to the VM system. Then require force when loading any 619 * remaining un-init'ed built-in modules to avoid later surprises. 620 */ 621 module_init_class(MODULE_CLASS_ANY); 622 module_builtin_require_force(); 623 624 /* 625 * Finalize configuration now that all real devices have been 626 * found. This needs to be done before the root device is 627 * selected, since finalization may create the root device. 628 */ 629 config_finalize(); 630 631 sysctl_finalize(); 632 633 /* 634 * Now that autoconfiguration has completed, we can determine 635 * the root and dump devices. 636 */ 637 cpu_rootconf(); 638 cpu_dumpconf(); 639 640 /* Mount the root file system. */ 641 do { 642 domountroothook(root_device); 643 if ((error = vfs_mountroot())) { 644 printf("cannot mount root, error = %d\n", error); 645 boothowto |= RB_ASKNAME; 646 setroot(root_device, 647 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 648 } 649 } while (error != 0); 650 mountroothook_destroy(); 651 652 configure3(); 653 654 /* 655 * Initialise the time-of-day clock, passing the time recorded 656 * in the root filesystem (if any) for use by systems that 657 * don't have a non-volatile time-of-day device. 658 */ 659 inittodr(rootfstime); 660 661 /* 662 * Now can look at time, having had a chance to verify the time 663 * from the file system. Reset l->l_rtime as it may have been 664 * munched in mi_switch() after the time got set. 665 */ 666 getnanotime(&time); 667 boottime = time; 668 669 mutex_enter(proc_lock); 670 LIST_FOREACH(p, &allproc, p_list) { 671 KASSERT((p->p_flag & PK_MARKER) == 0); 672 mutex_enter(p->p_lock); 673 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 674 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 675 lwp_lock(l); 676 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 677 lwp_unlock(l); 678 } 679 mutex_exit(p->p_lock); 680 } 681 mutex_exit(proc_lock); 682 binuptime(&curlwp->l_stime); 683 684 for (CPU_INFO_FOREACH(cii, ci)) { 685 ci->ci_schedstate.spc_lastmod = time_second; 686 } 687 688 /* Create the pageout daemon kernel thread. */ 689 uvm_swap_init(); 690 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 691 NULL, NULL, "pgdaemon")) 692 panic("fork pagedaemon"); 693 694 /* Create the filesystem syncer kernel thread. */ 695 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 696 NULL, NULL, "ioflush")) 697 panic("fork syncer"); 698 699 /* Create the aiodone daemon kernel thread. */ 700 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 701 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 702 panic("fork aiodoned"); 703 704 /* Wait for final configure threads to complete. */ 705 config_finalize_mountroot(); 706 707 /* 708 * Okay, now we can let init(8) exec! It's off to userland! 709 */ 710 mutex_enter(proc_lock); 711 start_init_exec = 1; 712 cv_broadcast(&lbolt); 713 mutex_exit(proc_lock); 714 715 /* The scheduler is an infinite loop. */ 716 uvm_scheduler(); 717 /* NOTREACHED */ 718 } 719 720 /* 721 * Configure the system's hardware. 722 */ 723 static void 724 configure(void) 725 { 726 727 /* Initialize autoconf data structures. */ 728 config_init_mi(); 729 /* 730 * XXX 731 * callout_setfunc() requires mutex(9) so it can't be in config_init() 732 * on amiga and atari which use config_init() and autoconf(9) fucntions 733 * to initialize console devices. 734 */ 735 config_twiddle_init(); 736 737 pmf_init(); 738 #if NDRVCTL > 0 739 drvctl_init(); 740 #endif 741 742 /* Initialize driver modules */ 743 module_init_class(MODULE_CLASS_DRIVER); 744 745 userconf_init(); 746 if (boothowto & RB_USERCONF) 747 userconf_prompt(); 748 749 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 750 printf_nolog("Detecting hardware..."); 751 } 752 753 /* 754 * Do the machine-dependent portion of autoconfiguration. This 755 * sets the configuration machinery here in motion by "finding" 756 * the root bus. When this function returns, we expect interrupts 757 * to be enabled. 758 */ 759 cpu_configure(); 760 } 761 762 static void 763 configure2(void) 764 { 765 CPU_INFO_ITERATOR cii; 766 struct cpu_info *ci; 767 int s; 768 769 /* 770 * Now that we've found all the hardware, start the real time 771 * and statistics clocks. 772 */ 773 initclocks(); 774 775 cold = 0; /* clocks are running, we're warm now! */ 776 s = splsched(); 777 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 778 splx(s); 779 780 /* Boot the secondary processors. */ 781 for (CPU_INFO_FOREACH(cii, ci)) { 782 uvm_cpu_attach(ci); 783 } 784 mp_online = true; 785 #if defined(MULTIPROCESSOR) 786 cpu_boot_secondary_processors(); 787 #endif 788 789 /* Setup the runqueues and scheduler. */ 790 runq_init(); 791 synch_init(); 792 793 /* 794 * Bus scans can make it appear as if the system has paused, so 795 * twiddle constantly while config_interrupts() jobs are running. 796 */ 797 config_twiddle_fn(NULL); 798 799 /* 800 * Create threads to call back and finish configuration for 801 * devices that want interrupts enabled. 802 */ 803 config_create_interruptthreads(); 804 } 805 806 static void 807 configure3(void) 808 { 809 810 /* 811 * Create threads to call back and finish configuration for 812 * devices that want the mounted root file system. 813 */ 814 config_create_mountrootthreads(); 815 816 /* Get the threads going and into any sleeps before continuing. */ 817 yield(); 818 } 819 820 static void 821 rootconf_handle_wedges(void) 822 { 823 struct partinfo dpart; 824 struct partition *p; 825 struct vnode *vp; 826 daddr_t startblk; 827 uint64_t nblks; 828 device_t dev; 829 int error; 830 831 if (booted_nblks) { 832 /* 833 * bootloader passed geometry 834 */ 835 dev = booted_device; 836 startblk = booted_startblk; 837 nblks = booted_nblks; 838 839 /* 840 * keep booted_device and booted_partition 841 * in case the kernel doesn't identify a wedge 842 */ 843 } else { 844 /* 845 * bootloader passed partition number 846 * 847 * We cannot ask the partition device directly when it is 848 * covered by a wedge. Instead we look up the geometry in 849 * the disklabel. 850 */ 851 vp = opendisk(booted_device); 852 853 if (vp == NULL) 854 return; 855 856 error = VOP_IOCTL(vp, DIOCGPART, &dpart, FREAD, NOCRED); 857 VOP_CLOSE(vp, FREAD, NOCRED); 858 vput(vp); 859 if (error) 860 return; 861 862 KASSERT(booted_partition >= 0 863 && booted_partition < MAXPARTITIONS); 864 865 p = &dpart.disklab->d_partitions[booted_partition]; 866 867 dev = booted_device; 868 startblk = p->p_offset; 869 nblks = p->p_size; 870 } 871 872 dev = dkwedge_find_partition(dev, startblk, nblks); 873 if (dev != NULL) { 874 booted_device = dev; 875 booted_partition = 0; 876 } 877 } 878 879 void 880 rootconf(void) 881 { 882 if (booted_device != NULL) 883 rootconf_handle_wedges(); 884 885 setroot(booted_device, booted_partition); 886 } 887 888 static void 889 check_console(struct lwp *l) 890 { 891 struct vnode *vp; 892 int error; 893 894 error = namei_simple_kernel("/dev/console", 895 NSM_FOLLOW_NOEMULROOT, &vp); 896 if (error == 0) 897 vrele(vp); 898 else if (error == ENOENT) 899 printf("warning: no /dev/console\n"); 900 else 901 printf("warning: lookup /dev/console: error %d\n", error); 902 } 903 904 /* 905 * List of paths to try when searching for "init". 906 */ 907 static const char * const initpaths[] = { 908 "/sbin/init", 909 "/sbin/oinit", 910 "/sbin/init.bak", 911 "/rescue/init", 912 NULL, 913 }; 914 915 /* 916 * Start the initial user process; try exec'ing each pathname in "initpaths". 917 * The program is invoked with one argument containing the boot flags. 918 */ 919 static void 920 start_init(void *arg) 921 { 922 struct lwp *l = arg; 923 struct proc *p = l->l_proc; 924 vaddr_t addr; 925 struct sys_execve_args /* { 926 syscallarg(const char *) path; 927 syscallarg(char * const *) argp; 928 syscallarg(char * const *) envp; 929 } */ args; 930 int options, i, error; 931 register_t retval[2]; 932 char flags[4], *flagsp; 933 const char *path, *slash; 934 char *ucp, **uap, *arg0, *arg1 = NULL; 935 char ipath[129]; 936 int ipx, len; 937 938 /* 939 * Now in process 1. 940 */ 941 strncpy(p->p_comm, "init", MAXCOMLEN); 942 943 /* 944 * Wait for main() to tell us that it's safe to exec. 945 */ 946 mutex_enter(proc_lock); 947 while (start_init_exec == 0) 948 cv_wait(&lbolt, proc_lock); 949 mutex_exit(proc_lock); 950 951 /* 952 * This is not the right way to do this. We really should 953 * hand-craft a descriptor onto /dev/console to hand to init, 954 * but that's a _lot_ more work, and the benefit from this easy 955 * hack makes up for the "good is the enemy of the best" effect. 956 */ 957 check_console(l); 958 959 /* 960 * Need just enough stack to hold the faked-up "execve()" arguments. 961 */ 962 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 963 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 964 NULL, UVM_UNKNOWN_OFFSET, 0, 965 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 966 UVM_ADV_NORMAL, 967 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 968 panic("init: couldn't allocate argument space"); 969 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 970 971 ipx = 0; 972 while (1) { 973 if (boothowto & RB_ASKNAME) { 974 printf("init path"); 975 if (initpaths[ipx]) 976 printf(" (default %s)", initpaths[ipx]); 977 printf(": "); 978 len = cngetsn(ipath, sizeof(ipath)-1); 979 if (len == 4 && strcmp(ipath, "halt") == 0) { 980 cpu_reboot(RB_HALT, NULL); 981 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 982 cpu_reboot(0, NULL); 983 #if defined(DDB) 984 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 985 console_debugger(); 986 continue; 987 #endif 988 } else if (len > 0 && ipath[0] == '/') { 989 ipath[len] = '\0'; 990 path = ipath; 991 } else if (len == 0 && initpaths[ipx] != NULL) { 992 path = initpaths[ipx++]; 993 } else { 994 printf("use absolute path, "); 995 #if defined(DDB) 996 printf("\"ddb\", "); 997 #endif 998 printf("\"halt\", or \"reboot\"\n"); 999 continue; 1000 } 1001 } else { 1002 if ((path = initpaths[ipx++]) == NULL) { 1003 ipx = 0; 1004 boothowto |= RB_ASKNAME; 1005 continue; 1006 } 1007 } 1008 1009 ucp = (char *)USRSTACK; 1010 1011 /* 1012 * Construct the boot flag argument. 1013 */ 1014 flagsp = flags; 1015 *flagsp++ = '-'; 1016 options = 0; 1017 1018 if (boothowto & RB_SINGLE) { 1019 *flagsp++ = 's'; 1020 options = 1; 1021 } 1022 #ifdef notyet 1023 if (boothowto & RB_FASTBOOT) { 1024 *flagsp++ = 'f'; 1025 options = 1; 1026 } 1027 #endif 1028 1029 /* 1030 * Move out the flags (arg 1), if necessary. 1031 */ 1032 if (options != 0) { 1033 *flagsp++ = '\0'; 1034 i = flagsp - flags; 1035 #ifdef DEBUG 1036 aprint_normal("init: copying out flags `%s' %d\n", flags, i); 1037 #endif 1038 arg1 = STACK_ALLOC(ucp, i); 1039 ucp = STACK_MAX(arg1, i); 1040 (void)copyout((void *)flags, arg1, i); 1041 } 1042 1043 /* 1044 * Move out the file name (also arg 0). 1045 */ 1046 i = strlen(path) + 1; 1047 #ifdef DEBUG 1048 aprint_normal("init: copying out path `%s' %d\n", path, i); 1049 #else 1050 if (boothowto & RB_ASKNAME || path != initpaths[0]) 1051 printf("init: trying %s\n", path); 1052 #endif 1053 arg0 = STACK_ALLOC(ucp, i); 1054 ucp = STACK_MAX(arg0, i); 1055 (void)copyout(path, arg0, i); 1056 1057 /* 1058 * Move out the arg pointers. 1059 */ 1060 ucp = (void *)STACK_ALIGN(ucp, STACK_ALIGNBYTES); 1061 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 1062 SCARG(&args, path) = arg0; 1063 SCARG(&args, argp) = uap; 1064 SCARG(&args, envp) = NULL; 1065 slash = strrchr(path, '/'); 1066 if (slash) 1067 (void)suword((void *)uap++, 1068 (long)arg0 + (slash + 1 - path)); 1069 else 1070 (void)suword((void *)uap++, (long)arg0); 1071 if (options != 0) 1072 (void)suword((void *)uap++, (long)arg1); 1073 (void)suword((void *)uap++, 0); /* terminator */ 1074 1075 /* 1076 * Now try to exec the program. If can't for any reason 1077 * other than it doesn't exist, complain. 1078 */ 1079 error = sys_execve(l, &args, retval); 1080 if (error == 0 || error == EJUSTRETURN) { 1081 KERNEL_UNLOCK_LAST(l); 1082 return; 1083 } 1084 printf("exec %s: error %d\n", path, error); 1085 } 1086 printf("init: not found\n"); 1087 panic("no init"); 1088 } 1089 1090 /* 1091 * calculate cache size (in bytes) from physmem and vsize. 1092 */ 1093 vaddr_t 1094 calc_cache_size(vsize_t vsize, int pct, int va_pct) 1095 { 1096 paddr_t t; 1097 1098 /* XXX should consider competing cache if any */ 1099 /* XXX should consider submaps */ 1100 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1101 if (vsize != 0) { 1102 vsize = (uintmax_t)vsize * va_pct / 100; 1103 if (t > vsize) { 1104 t = vsize; 1105 } 1106 } 1107 return t; 1108 } 1109 1110 /* 1111 * Print the system start up banner. 1112 * 1113 * - Print a limited banner if AB_SILENT. 1114 * - Always send normal banner to the log. 1115 */ 1116 #define MEM_PBUFSIZE sizeof("99999 MB") 1117 1118 void 1119 banner(void) 1120 { 1121 static char notice[] = " Notice: this software is " 1122 "protected by copyright"; 1123 char pbuf[81]; 1124 void (*pr)(const char *, ...) __printflike(1, 2); 1125 int i; 1126 1127 if ((boothowto & AB_SILENT) != 0) { 1128 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1129 ostype, osrelease, kernel_ident); 1130 printf_nolog("%s", pbuf); 1131 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1132 printf(" "); 1133 printf_nolog("%s\n", notice); 1134 pr = aprint_normal; 1135 } else { 1136 pr = printf; 1137 } 1138 1139 memset(pbuf, 0, sizeof(pbuf)); 1140 (*pr)("%s%s", copyright, version); 1141 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1142 (*pr)("total memory = %s\n", pbuf); 1143 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1144 (*pr)("avail memory = %s\n", pbuf); 1145 } 1146