init_main.c revision 1.385
1 /* $NetBSD: init_main.c,v 1.385 2009/03/29 10:58:28 ad 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 1.385 2009/03/29 10:58:28 ad 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" 114 115 #include "ksyms.h" 116 #include "rnd.h" 117 #include "sysmon_envsys.h" 118 #include "sysmon_power.h" 119 #include "sysmon_taskq.h" 120 #include "sysmon_wdog.h" 121 #include "veriexec.h" 122 123 #include <sys/param.h> 124 #include <sys/acct.h> 125 #include <sys/filedesc.h> 126 #include <sys/file.h> 127 #include <sys/errno.h> 128 #include <sys/callout.h> 129 #include <sys/cpu.h> 130 #include <sys/kernel.h> 131 #include <sys/mount.h> 132 #include <sys/proc.h> 133 #include <sys/kthread.h> 134 #include <sys/resourcevar.h> 135 #include <sys/signalvar.h> 136 #include <sys/systm.h> 137 #include <sys/vnode.h> 138 #include <sys/fstrans.h> 139 #include <sys/tty.h> 140 #include <sys/conf.h> 141 #include <sys/disklabel.h> 142 #include <sys/buf.h> 143 #include <sys/device.h> 144 #include <sys/exec.h> 145 #include <sys/socketvar.h> 146 #include <sys/protosw.h> 147 #include <sys/percpu.h> 148 #include <sys/pset.h> 149 #include <sys/sysctl.h> 150 #include <sys/reboot.h> 151 #include <sys/user.h> 152 #include <sys/sysctl.h> 153 #include <sys/event.h> 154 #include <sys/mbuf.h> 155 #include <sys/sched.h> 156 #include <sys/sleepq.h> 157 #include <sys/iostat.h> 158 #include <sys/vmem.h> 159 #include <sys/uuid.h> 160 #include <sys/extent.h> 161 #include <sys/disk.h> 162 #include <sys/mqueue.h> 163 #include <sys/msgbuf.h> 164 #include <sys/module.h> 165 #include <sys/event.h> 166 #include <sys/lockf.h> 167 #include <sys/once.h> 168 #include <sys/ksyms.h> 169 #include <sys/uidinfo.h> 170 #include <sys/kprintf.h> 171 #ifdef FAST_IPSEC 172 #include <netipsec/ipsec.h> 173 #endif 174 #ifdef SYSVSHM 175 #include <sys/shm.h> 176 #endif 177 #ifdef SYSVSEM 178 #include <sys/sem.h> 179 #endif 180 #ifdef SYSVMSG 181 #include <sys/msg.h> 182 #endif 183 #include <sys/domain.h> 184 #include <sys/namei.h> 185 #if NRND > 0 186 #include <sys/rnd.h> 187 #endif 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 #ifdef WAPBL 197 #include <sys/wapbl.h> 198 #endif 199 #include <net80211/ieee80211_netbsd.h> 200 201 #include <sys/syscall.h> 202 #include <sys/syscallargs.h> 203 204 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 205 #include <sys/pax.h> 206 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 207 208 #include <ufs/ufs/quota.h> 209 210 #include <miscfs/genfs/genfs.h> 211 #include <miscfs/syncfs/syncfs.h> 212 213 #include <sys/cpu.h> 214 215 #include <uvm/uvm.h> 216 217 #if NSYSMON_TASKQ > 0 218 #include <dev/sysmon/sysmon_taskq.h> 219 #endif 220 221 #include <dev/cons.h> 222 223 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 224 #include <dev/sysmon/sysmonvar.h> 225 #endif 226 227 #include <net/if.h> 228 #include <net/raw_cb.h> 229 230 #include <secmodel/secmodel.h> 231 232 #ifdef COMPAT_50 233 #include <compat/sys/time.h> 234 struct timeval50 boottime50; 235 #endif 236 237 extern struct proc proc0; 238 extern struct lwp lwp0; 239 extern struct cwdinfo cwdi0; 240 extern time_t rootfstime; 241 242 #ifndef curlwp 243 struct lwp *curlwp = &lwp0; 244 #endif 245 struct proc *initproc; 246 247 struct vnode *rootvp, *swapdev_vp; 248 int boothowto; 249 int cold = 1; /* still working on startup */ 250 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 251 252 int start_init_exec; /* semaphore for start_init() */ 253 254 static void check_console(struct lwp *l); 255 static void start_init(void *); 256 void main(void); 257 258 void __secmodel_none(void); 259 __weak_alias(secmodel_start,__secmodel_none); 260 void 261 __secmodel_none(void) 262 { 263 return; 264 } 265 266 /* 267 * System startup; initialize the world, create process 0, mount root 268 * filesystem, and fork to create init and pagedaemon. Most of the 269 * hard work is done in the lower-level initialization routines including 270 * startup(), which does memory initialization and autoconfiguration. 271 */ 272 void 273 main(void) 274 { 275 struct timespec time; 276 struct lwp *l; 277 struct proc *p; 278 int s, error; 279 #ifdef NVNODE_IMPLICIT 280 int usevnodes; 281 #endif 282 CPU_INFO_ITERATOR cii; 283 struct cpu_info *ci; 284 285 l = &lwp0; 286 #ifndef LWP0_CPU_INFO 287 l->l_cpu = curcpu(); 288 #endif 289 290 /* 291 * Attempt to find console and initialize 292 * in case of early panic or other messages. 293 */ 294 consinit(); 295 296 kernel_lock_init(); 297 once_init(); 298 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 299 300 uvm_init(); 301 302 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 303 ksyms_init(); 304 #endif 305 kprintf_init(); 306 307 percpu_init(); 308 309 /* Initialize lock caches. */ 310 mutex_obj_init(); 311 312 /* Initialize the extent manager. */ 313 extent_init(); 314 315 /* Do machine-dependent initialization. */ 316 cpu_startup(); 317 318 /* Initialize the sysctl subsystem. */ 319 sysctl_init(); 320 321 /* Initialize callouts, part 1. */ 322 callout_startup(); 323 324 /* 325 * Initialize the kernel authorization subsystem and start the 326 * default security model, if any. We need to do this early 327 * enough so that subsystems relying on any of the aforementioned 328 * can work properly. Since the security model may dictate the 329 * credential inheritance policy, it is needed at least before 330 * any process is created, specifically proc0. 331 */ 332 kauth_init(); 333 secmodel_start(); 334 335 /* Initialize the buffer cache */ 336 bufinit(); 337 338 /* Initialize sockets. */ 339 soinit(); 340 341 /* 342 * The following things must be done before autoconfiguration. 343 */ 344 evcnt_init(); /* initialize event counters */ 345 #if NRND > 0 346 rnd_init(); /* initialize random number generator */ 347 #endif 348 349 /* Initialize process and pgrp structures. */ 350 procinit(); 351 lwpinit(); 352 353 /* Initialize signal-related data structures. */ 354 signal_init(); 355 356 /* Initialize resource management. */ 357 resource_init(); 358 359 /* Create process 0 (the swapper). */ 360 proc0_init(); 361 362 /* Disable preemption during boot. */ 363 kpreempt_disable(); 364 365 /* Initialize the UID hash table. */ 366 uid_init(); 367 368 /* Charge root for one process. */ 369 (void)chgproccnt(0, 1); 370 371 /* Initialize timekeeping. */ 372 time_init(); 373 374 /* Initialize the run queues, turnstiles and sleep queues. */ 375 sched_rqinit(); 376 turnstile_init(); 377 sleeptab_init(&sleeptab); 378 379 /* Initialize processor-sets */ 380 psets_init(); 381 382 /* MI initialization of the boot cpu */ 383 error = mi_cpu_attach(curcpu()); 384 KASSERT(error == 0); 385 386 /* Initialize timekeeping, part 2. */ 387 time_init2(); 388 389 /* 390 * Initialize mbuf's. Do this now because we might attempt to 391 * allocate mbufs or mbuf clusters during autoconfiguration. 392 */ 393 mbinit(); 394 395 /* Initialize I/O statistics. */ 396 iostat_init(); 397 398 /* Initialize the log device. */ 399 loginit(); 400 401 /* Start module system. */ 402 module_init(); 403 404 /* Initialize the file systems. */ 405 #ifdef NVNODE_IMPLICIT 406 /* 407 * If maximum number of vnodes in namei vnode cache is not explicitly 408 * defined in kernel config, adjust the number such as we use roughly 409 * 10% of memory for vnodes and associated data structures in the 410 * assumed worst case. Do not provide fewer than NVNODE vnodes. 411 */ 412 usevnodes = 413 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 414 if (usevnodes > desiredvnodes) 415 desiredvnodes = usevnodes; 416 #endif 417 vfsinit(); 418 lf_init(); 419 420 /* Initialize fstrans. */ 421 fstrans_init(); 422 423 /* Initialize the file descriptor system. */ 424 fd_sys_init(); 425 426 /* Initialize cwd structures */ 427 cwd_sys_init(); 428 429 /* Initialize kqueue. */ 430 kqueue_init(); 431 432 /* Initialize message queues. */ 433 mqueue_sysinit(); 434 435 /* Initialize the system monitor subsystems. */ 436 #if NSYSMON_TASKQ > 0 437 sysmon_task_queue_preinit(); 438 #endif 439 440 #if NSYSMON_ENVSYS > 0 441 sysmon_envsys_init(); 442 #endif 443 444 #if NSYSMON_POWER > 0 445 sysmon_power_init(); 446 #endif 447 448 #if NSYSMON_WDOG > 0 449 sysmon_wdog_init(); 450 #endif 451 452 inittimecounter(); 453 ntp_init(); 454 455 /* Initialize the device switch tables. */ 456 devsw_init(); 457 458 /* Initialize tty subsystem. */ 459 tty_init(); 460 ttyldisc_init(); 461 462 /* Initialize the buffer cache, part 2. */ 463 bufinit2(); 464 465 /* Initialize the disk wedge subsystem. */ 466 dkwedge_init(); 467 468 /* Initialize interfaces. */ 469 ifinit1(); 470 471 /* Configure the system hardware. This will enable interrupts. */ 472 configure(); 473 474 ssp_init(); 475 476 configure2(); 477 478 /* Now timer is working. Enable preemption. */ 479 kpreempt_enable(); 480 481 ubc_init(); /* must be after autoconfig */ 482 483 #ifdef SYSVSHM 484 /* Initialize System V style shared memory. */ 485 shminit(); 486 #endif 487 488 #ifdef SYSVSEM 489 /* Initialize System V style semaphores. */ 490 seminit(); 491 #endif 492 493 #ifdef SYSVMSG 494 /* Initialize System V style message queues. */ 495 msginit(); 496 #endif 497 498 #if NVERIEXEC > 0 499 /* 500 * Initialise the Veriexec subsystem. 501 */ 502 veriexec_init(); 503 #endif /* NVERIEXEC > 0 */ 504 505 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 506 pax_init(); 507 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 508 509 #ifdef FAST_IPSEC 510 /* Attach network crypto subsystem */ 511 ipsec_attach(); 512 #endif 513 514 /* 515 * Initialize protocols. Block reception of incoming packets 516 * until everything is ready. 517 */ 518 s = splnet(); 519 ifinit(); 520 domaininit(); 521 if_attachdomain(); 522 splx(s); 523 524 #ifdef GPROF 525 /* Initialize kernel profiling. */ 526 kmstartup(); 527 #endif 528 529 /* Initialize system accounting. */ 530 acct_init(); 531 532 #ifndef PIPE_SOCKETPAIR 533 /* Initialize pipes. */ 534 pipe_init(); 535 #endif 536 537 #ifdef KTRACE 538 /* Initialize ktrace. */ 539 ktrinit(); 540 #endif 541 542 /* Initialize the UUID system calls. */ 543 uuid_init(); 544 545 #ifdef WAPBL 546 /* Initialize write-ahead physical block logging. */ 547 wapbl_init(); 548 #endif 549 550 /* 551 * Create process 1 (init(8)). We do this now, as Unix has 552 * historically had init be process 1, and changing this would 553 * probably upset a lot of people. 554 * 555 * Note that process 1 won't immediately exec init(8), but will 556 * wait for us to inform it that the root file system has been 557 * mounted. 558 */ 559 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 560 panic("fork init"); 561 562 /* 563 * Load any remaining builtin modules, and hand back temporary 564 * storage to the VM system. 565 */ 566 module_init_class(MODULE_CLASS_ANY); 567 568 /* 569 * Finalize configuration now that all real devices have been 570 * found. This needs to be done before the root device is 571 * selected, since finalization may create the root device. 572 */ 573 config_finalize(); 574 575 /* 576 * Now that autoconfiguration has completed, we can determine 577 * the root and dump devices. 578 */ 579 cpu_rootconf(); 580 cpu_dumpconf(); 581 582 /* Mount the root file system. */ 583 do { 584 domountroothook(); 585 if ((error = vfs_mountroot())) { 586 printf("cannot mount root, error = %d\n", error); 587 boothowto |= RB_ASKNAME; 588 setroot(root_device, 589 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 590 } 591 } while (error != 0); 592 mountroothook_destroy(); 593 594 /* 595 * Initialise the time-of-day clock, passing the time recorded 596 * in the root filesystem (if any) for use by systems that 597 * don't have a non-volatile time-of-day device. 598 */ 599 inittodr(rootfstime); 600 601 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 602 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 603 604 /* 605 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 606 * reference it. 607 */ 608 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 609 if (error) 610 panic("cannot find root vnode, error=%d", error); 611 cwdi0.cwdi_cdir = rootvnode; 612 VREF(cwdi0.cwdi_cdir); 613 VOP_UNLOCK(rootvnode, 0); 614 cwdi0.cwdi_rdir = NULL; 615 616 /* 617 * Now that root is mounted, we can fixup initproc's CWD 618 * info. All other processes are kthreads, which merely 619 * share proc0's CWD info. 620 */ 621 initproc->p_cwdi->cwdi_cdir = rootvnode; 622 VREF(initproc->p_cwdi->cwdi_cdir); 623 initproc->p_cwdi->cwdi_rdir = NULL; 624 625 /* 626 * Now can look at time, having had a chance to verify the time 627 * from the file system. Reset l->l_rtime as it may have been 628 * munched in mi_switch() after the time got set. 629 */ 630 getnanotime(&time); 631 boottime = time; 632 #ifdef COMPAT_50 633 { 634 struct timeval tv; 635 TIMESPEC_TO_TIMEVAL(&tv, &time); 636 timeval_to_timeval50(&tv, &boottime50); 637 } 638 #endif 639 mutex_enter(proc_lock); 640 LIST_FOREACH(p, &allproc, p_list) { 641 KASSERT((p->p_flag & PK_MARKER) == 0); 642 mutex_enter(p->p_lock); 643 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 644 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 645 lwp_lock(l); 646 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 647 lwp_unlock(l); 648 } 649 mutex_exit(p->p_lock); 650 } 651 mutex_exit(proc_lock); 652 binuptime(&curlwp->l_stime); 653 654 for (CPU_INFO_FOREACH(cii, ci)) { 655 ci->ci_schedstate.spc_lastmod = time_second; 656 } 657 658 /* Create the pageout daemon kernel thread. */ 659 uvm_swap_init(); 660 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 661 NULL, NULL, "pgdaemon")) 662 panic("fork pagedaemon"); 663 664 /* Create the filesystem syncer kernel thread. */ 665 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 666 NULL, NULL, "ioflush")) 667 panic("fork syncer"); 668 669 /* Create the aiodone daemon kernel thread. */ 670 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 671 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 672 panic("fork aiodoned"); 673 674 vmem_rehash_start(); 675 676 /* Initialize exec structures */ 677 exec_init(1); 678 679 /* 680 * Okay, now we can let init(8) exec! It's off to userland! 681 */ 682 mutex_enter(proc_lock); 683 start_init_exec = 1; 684 cv_broadcast(&lbolt); 685 mutex_exit(proc_lock); 686 687 /* The scheduler is an infinite loop. */ 688 uvm_scheduler(); 689 /* NOTREACHED */ 690 } 691 692 static void 693 check_console(struct lwp *l) 694 { 695 struct nameidata nd; 696 int error; 697 698 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 699 error = namei(&nd); 700 if (error == 0) 701 vrele(nd.ni_vp); 702 else if (error == ENOENT) 703 printf("warning: no /dev/console\n"); 704 else 705 printf("warning: lookup /dev/console: error %d\n", error); 706 } 707 708 /* 709 * List of paths to try when searching for "init". 710 */ 711 static const char * const initpaths[] = { 712 "/sbin/init", 713 "/sbin/oinit", 714 "/sbin/init.bak", 715 NULL, 716 }; 717 718 /* 719 * Start the initial user process; try exec'ing each pathname in "initpaths". 720 * The program is invoked with one argument containing the boot flags. 721 */ 722 static void 723 start_init(void *arg) 724 { 725 struct lwp *l = arg; 726 struct proc *p = l->l_proc; 727 vaddr_t addr; 728 struct sys_execve_args /* { 729 syscallarg(const char *) path; 730 syscallarg(char * const *) argp; 731 syscallarg(char * const *) envp; 732 } */ args; 733 int options, i, error; 734 register_t retval[2]; 735 char flags[4], *flagsp; 736 const char *path, *slash; 737 char *ucp, **uap, *arg0, *arg1 = NULL; 738 char ipath[129]; 739 int ipx, len; 740 741 /* 742 * Now in process 1. 743 */ 744 strncpy(p->p_comm, "init", MAXCOMLEN); 745 746 /* 747 * Wait for main() to tell us that it's safe to exec. 748 */ 749 mutex_enter(proc_lock); 750 while (start_init_exec == 0) 751 cv_wait(&lbolt, proc_lock); 752 mutex_exit(proc_lock); 753 754 /* 755 * This is not the right way to do this. We really should 756 * hand-craft a descriptor onto /dev/console to hand to init, 757 * but that's a _lot_ more work, and the benefit from this easy 758 * hack makes up for the "good is the enemy of the best" effect. 759 */ 760 check_console(l); 761 762 /* 763 * Need just enough stack to hold the faked-up "execve()" arguments. 764 */ 765 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 766 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 767 NULL, UVM_UNKNOWN_OFFSET, 0, 768 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 769 UVM_ADV_NORMAL, 770 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 771 panic("init: couldn't allocate argument space"); 772 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 773 774 ipx = 0; 775 while (1) { 776 if (boothowto & RB_ASKNAME) { 777 printf("init path"); 778 if (initpaths[ipx]) 779 printf(" (default %s)", initpaths[ipx]); 780 printf(": "); 781 len = cngetsn(ipath, sizeof(ipath)-1); 782 if (len == 4 && strcmp(ipath, "halt") == 0) { 783 cpu_reboot(RB_HALT, NULL); 784 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 785 cpu_reboot(0, NULL); 786 #if defined(DDB) 787 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 788 console_debugger(); 789 continue; 790 #endif 791 } else if (len > 0 && ipath[0] == '/') { 792 ipath[len] = '\0'; 793 path = ipath; 794 } else if (len == 0 && initpaths[ipx] != NULL) { 795 path = initpaths[ipx++]; 796 } else { 797 printf("use absolute path, "); 798 #if defined(DDB) 799 printf("\"ddb\", "); 800 #endif 801 printf("\"halt\", or \"reboot\"\n"); 802 continue; 803 } 804 } else { 805 if ((path = initpaths[ipx++]) == NULL) { 806 ipx = 0; 807 boothowto |= RB_ASKNAME; 808 continue; 809 } 810 } 811 812 ucp = (char *)USRSTACK; 813 814 /* 815 * Construct the boot flag argument. 816 */ 817 flagsp = flags; 818 *flagsp++ = '-'; 819 options = 0; 820 821 if (boothowto & RB_SINGLE) { 822 *flagsp++ = 's'; 823 options = 1; 824 } 825 #ifdef notyet 826 if (boothowto & RB_FASTBOOT) { 827 *flagsp++ = 'f'; 828 options = 1; 829 } 830 #endif 831 832 /* 833 * Move out the flags (arg 1), if necessary. 834 */ 835 if (options != 0) { 836 *flagsp++ = '\0'; 837 i = flagsp - flags; 838 #ifdef DEBUG 839 printf("init: copying out flags `%s' %d\n", flags, i); 840 #endif 841 arg1 = STACK_ALLOC(ucp, i); 842 ucp = STACK_MAX(arg1, i); 843 (void)copyout((void *)flags, arg1, i); 844 } 845 846 /* 847 * Move out the file name (also arg 0). 848 */ 849 i = strlen(path) + 1; 850 #ifdef DEBUG 851 printf("init: copying out path `%s' %d\n", path, i); 852 #else 853 if (boothowto & RB_ASKNAME || path != initpaths[0]) 854 printf("init: trying %s\n", path); 855 #endif 856 arg0 = STACK_ALLOC(ucp, i); 857 ucp = STACK_MAX(arg0, i); 858 (void)copyout(path, arg0, i); 859 860 /* 861 * Move out the arg pointers. 862 */ 863 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 864 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 865 SCARG(&args, path) = arg0; 866 SCARG(&args, argp) = uap; 867 SCARG(&args, envp) = NULL; 868 slash = strrchr(path, '/'); 869 if (slash) 870 (void)suword((void *)uap++, 871 (long)arg0 + (slash + 1 - path)); 872 else 873 (void)suword((void *)uap++, (long)arg0); 874 if (options != 0) 875 (void)suword((void *)uap++, (long)arg1); 876 (void)suword((void *)uap++, 0); /* terminator */ 877 878 /* 879 * Now try to exec the program. If can't for any reason 880 * other than it doesn't exist, complain. 881 */ 882 error = sys_execve(l, &args, retval); 883 if (error == 0 || error == EJUSTRETURN) { 884 KERNEL_UNLOCK_LAST(l); 885 return; 886 } 887 printf("exec %s: error %d\n", path, error); 888 } 889 printf("init: not found\n"); 890 panic("no init"); 891 } 892 893 /* 894 * calculate cache size from physmem and vm_map size. 895 */ 896 vaddr_t 897 calc_cache_size(struct vm_map *map, int pct, int va_pct) 898 { 899 paddr_t t; 900 901 /* XXX should consider competing cache if any */ 902 /* XXX should consider submaps */ 903 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 904 if (map != NULL) { 905 vsize_t vsize; 906 907 vsize = vm_map_max(map) - vm_map_min(map); 908 vsize = (uintmax_t)vsize * va_pct / 100; 909 if (t > vsize) { 910 t = vsize; 911 } 912 } 913 return t; 914 } 915 916 /* 917 * Print the system start up banner. 918 * 919 * - Print a limited banner if AB_SILENT. 920 * - Always send normal banner to the log. 921 */ 922 void 923 banner(void) 924 { 925 static char notice[] = " Notice: this software is " 926 "protected by copyright"; 927 char pbuf[80]; 928 void (*pr)(const char *, ...); 929 int i; 930 931 if ((boothowto & AB_SILENT) != 0) { 932 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 933 ostype, osrelease, kernel_ident); 934 printf("%s", pbuf); 935 for (i = 80 - strlen(pbuf) - sizeof(notice); i != 0; i--) 936 printf(" "); 937 printf("%s\n", notice); 938 pr = aprint_normal; 939 } else { 940 pr = printf; 941 } 942 943 memset(pbuf, 0, sizeof(pbuf)); 944 (*pr)("%lld physmem\n", (long long)ptoa(physmem)); 945 (*pr)("%lld free\n", (long long)ptoa(uvmexp.free)); 946 (*pr)("%s%s", copyright, version); 947 format_bytes(pbuf, sizeof(pbuf), ctob((uint64_t)physmem)); 948 (*pr)("total memory = %s\n", pbuf); 949 format_bytes(pbuf, sizeof(pbuf), ctob((uint64_t)uvmexp.free)); 950 (*pr)("avail memory = %s\n", pbuf); 951 } 952
Indexes created Sun Sep 21 20:09:37 GMT 2025