init_main.c revision 1.391
1 /* $NetBSD: init_main.c,v 1.391 2009/06/29 05:08:18 dholland 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 1.391 2009/06/29 05:08:18 dholland 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 rw_obj_init(); 312 313 /* Initialize the extent manager. */ 314 extent_init(); 315 316 /* Do machine-dependent initialization. */ 317 cpu_startup(); 318 319 /* Initialize the sysctl subsystem. */ 320 sysctl_init(); 321 322 /* Initialize callouts, part 1. */ 323 callout_startup(); 324 325 /* 326 * Initialize the kernel authorization subsystem and start the 327 * default security model, if any. We need to do this early 328 * enough so that subsystems relying on any of the aforementioned 329 * can work properly. Since the security model may dictate the 330 * credential inheritance policy, it is needed at least before 331 * any process is created, specifically proc0. 332 */ 333 kauth_init(); 334 secmodel_start(); 335 336 /* Initialize the buffer cache */ 337 bufinit(); 338 339 /* Initialize sockets. */ 340 soinit(); 341 342 /* 343 * The following things must be done before autoconfiguration. 344 */ 345 evcnt_init(); /* initialize event counters */ 346 #if NRND > 0 347 rnd_init(); /* initialize random number generator */ 348 #endif 349 350 /* Initialize process and pgrp structures. */ 351 procinit(); 352 lwpinit(); 353 354 /* Initialize signal-related data structures. */ 355 signal_init(); 356 357 /* Initialize resource management. */ 358 resource_init(); 359 360 /* Create process 0 (the swapper). */ 361 proc0_init(); 362 363 /* Disable preemption during boot. */ 364 kpreempt_disable(); 365 366 /* Initialize the UID hash table. */ 367 uid_init(); 368 369 /* Charge root for one process. */ 370 (void)chgproccnt(0, 1); 371 372 /* Initialize timekeeping. */ 373 time_init(); 374 375 /* Initialize the run queues, turnstiles and sleep queues. */ 376 sched_rqinit(); 377 turnstile_init(); 378 sleeptab_init(&sleeptab); 379 380 /* Initialize processor-sets */ 381 psets_init(); 382 383 /* MI initialization of the boot cpu */ 384 error = mi_cpu_attach(curcpu()); 385 KASSERT(error == 0); 386 387 /* Initialize timekeeping, part 2. */ 388 time_init2(); 389 390 /* 391 * Initialize mbuf's. Do this now because we might attempt to 392 * allocate mbufs or mbuf clusters during autoconfiguration. 393 */ 394 mbinit(); 395 396 /* Initialize I/O statistics. */ 397 iostat_init(); 398 399 /* Initialize the log device. */ 400 loginit(); 401 402 /* Start module system. */ 403 module_init(); 404 405 /* Initialize the file systems. */ 406 #ifdef NVNODE_IMPLICIT 407 /* 408 * If maximum number of vnodes in namei vnode cache is not explicitly 409 * defined in kernel config, adjust the number such as we use roughly 410 * 10% of memory for vnodes and associated data structures in the 411 * assumed worst case. Do not provide fewer than NVNODE vnodes. 412 */ 413 usevnodes = 414 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 415 if (usevnodes > desiredvnodes) 416 desiredvnodes = usevnodes; 417 #endif 418 vfsinit(); 419 lf_init(); 420 421 /* Initialize fstrans. */ 422 fstrans_init(); 423 424 /* Initialize the file descriptor system. */ 425 fd_sys_init(); 426 427 /* Initialize cwd structures */ 428 cwd_sys_init(); 429 430 /* Initialize kqueue. */ 431 kqueue_init(); 432 433 /* Initialize message queues. */ 434 mqueue_sysinit(); 435 436 /* Initialize the system monitor subsystems. */ 437 #if NSYSMON_TASKQ > 0 438 sysmon_task_queue_preinit(); 439 #endif 440 441 #if NSYSMON_ENVSYS > 0 442 sysmon_envsys_init(); 443 #endif 444 445 #if NSYSMON_POWER > 0 446 sysmon_power_init(); 447 #endif 448 449 #if NSYSMON_WDOG > 0 450 sysmon_wdog_init(); 451 #endif 452 453 inittimecounter(); 454 ntp_init(); 455 456 /* Initialize the device switch tables. */ 457 devsw_init(); 458 459 /* Initialize tty subsystem. */ 460 tty_init(); 461 ttyldisc_init(); 462 463 /* Initialize the buffer cache, part 2. */ 464 bufinit2(); 465 466 /* Initialize the disk wedge subsystem. */ 467 dkwedge_init(); 468 469 /* Initialize interfaces. */ 470 ifinit1(); 471 472 /* Configure the system hardware. This will enable interrupts. */ 473 configure(); 474 475 ssp_init(); 476 477 configure2(); 478 479 /* Now timer is working. Enable preemption. */ 480 kpreempt_enable(); 481 482 ubc_init(); /* must be after autoconfig */ 483 484 #ifdef SYSVSHM 485 /* Initialize System V style shared memory. */ 486 shminit(); 487 #endif 488 489 #ifdef SYSVSEM 490 /* Initialize System V style semaphores. */ 491 seminit(); 492 #endif 493 494 #ifdef SYSVMSG 495 /* Initialize System V style message queues. */ 496 msginit(); 497 #endif 498 499 #if NVERIEXEC > 0 500 /* 501 * Initialise the Veriexec subsystem. 502 */ 503 veriexec_init(); 504 #endif /* NVERIEXEC > 0 */ 505 506 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 507 pax_init(); 508 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 509 510 #ifdef FAST_IPSEC 511 /* Attach network crypto subsystem */ 512 ipsec_attach(); 513 #endif 514 515 /* 516 * Initialize protocols. Block reception of incoming packets 517 * until everything is ready. 518 */ 519 s = splnet(); 520 ifinit(); 521 domaininit(true); 522 if_attachdomain(); 523 splx(s); 524 525 #ifdef GPROF 526 /* Initialize kernel profiling. */ 527 kmstartup(); 528 #endif 529 530 /* Initialize system accounting. */ 531 acct_init(); 532 533 #ifndef PIPE_SOCKETPAIR 534 /* Initialize pipes. */ 535 pipe_init(); 536 #endif 537 538 #ifdef KTRACE 539 /* Initialize ktrace. */ 540 ktrinit(); 541 #endif 542 543 /* Initialize the UUID system calls. */ 544 uuid_init(); 545 546 #ifdef WAPBL 547 /* Initialize write-ahead physical block logging. */ 548 wapbl_init(); 549 #endif 550 551 /* 552 * Create process 1 (init(8)). We do this now, as Unix has 553 * historically had init be process 1, and changing this would 554 * probably upset a lot of people. 555 * 556 * Note that process 1 won't immediately exec init(8), but will 557 * wait for us to inform it that the root file system has been 558 * mounted. 559 */ 560 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 561 panic("fork init"); 562 563 /* 564 * Load any remaining builtin modules, and hand back temporary 565 * storage to the VM system. 566 */ 567 module_init_class(MODULE_CLASS_ANY); 568 569 /* 570 * Finalize configuration now that all real devices have been 571 * found. This needs to be done before the root device is 572 * selected, since finalization may create the root device. 573 */ 574 config_finalize(); 575 576 /* 577 * Now that autoconfiguration has completed, we can determine 578 * the root and dump devices. 579 */ 580 cpu_rootconf(); 581 cpu_dumpconf(); 582 583 /* Mount the root file system. */ 584 do { 585 domountroothook(); 586 if ((error = vfs_mountroot())) { 587 printf("cannot mount root, error = %d\n", error); 588 boothowto |= RB_ASKNAME; 589 setroot(root_device, 590 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 591 } 592 } while (error != 0); 593 mountroothook_destroy(); 594 595 /* 596 * Initialise the time-of-day clock, passing the time recorded 597 * in the root filesystem (if any) for use by systems that 598 * don't have a non-volatile time-of-day device. 599 */ 600 inittodr(rootfstime); 601 602 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 603 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 604 605 /* 606 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 607 * reference it. 608 */ 609 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 610 if (error) 611 panic("cannot find root vnode, error=%d", error); 612 cwdi0.cwdi_cdir = rootvnode; 613 VREF(cwdi0.cwdi_cdir); 614 VOP_UNLOCK(rootvnode, 0); 615 cwdi0.cwdi_rdir = NULL; 616 617 /* 618 * Now that root is mounted, we can fixup initproc's CWD 619 * info. All other processes are kthreads, which merely 620 * share proc0's CWD info. 621 */ 622 initproc->p_cwdi->cwdi_cdir = rootvnode; 623 VREF(initproc->p_cwdi->cwdi_cdir); 624 initproc->p_cwdi->cwdi_rdir = NULL; 625 626 /* 627 * Now can look at time, having had a chance to verify the time 628 * from the file system. Reset l->l_rtime as it may have been 629 * munched in mi_switch() after the time got set. 630 */ 631 getnanotime(&time); 632 boottime = time; 633 #ifdef COMPAT_50 634 { 635 struct timeval tv; 636 TIMESPEC_TO_TIMEVAL(&tv, &time); 637 timeval_to_timeval50(&tv, &boottime50); 638 } 639 #endif 640 mutex_enter(proc_lock); 641 LIST_FOREACH(p, &allproc, p_list) { 642 KASSERT((p->p_flag & PK_MARKER) == 0); 643 mutex_enter(p->p_lock); 644 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 645 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 646 lwp_lock(l); 647 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 648 lwp_unlock(l); 649 } 650 mutex_exit(p->p_lock); 651 } 652 mutex_exit(proc_lock); 653 binuptime(&curlwp->l_stime); 654 655 for (CPU_INFO_FOREACH(cii, ci)) { 656 ci->ci_schedstate.spc_lastmod = time_second; 657 } 658 659 /* Create the pageout daemon kernel thread. */ 660 uvm_swap_init(); 661 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 662 NULL, NULL, "pgdaemon")) 663 panic("fork pagedaemon"); 664 665 /* Create the filesystem syncer kernel thread. */ 666 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 667 NULL, NULL, "ioflush")) 668 panic("fork syncer"); 669 670 /* Create the aiodone daemon kernel thread. */ 671 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 672 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 673 panic("fork aiodoned"); 674 675 vmem_rehash_start(); 676 677 /* Initialize exec structures */ 678 exec_init(1); 679 680 /* 681 * Okay, now we can let init(8) exec! It's off to userland! 682 */ 683 mutex_enter(proc_lock); 684 start_init_exec = 1; 685 cv_broadcast(&lbolt); 686 mutex_exit(proc_lock); 687 688 /* The scheduler is an infinite loop. */ 689 uvm_scheduler(); 690 /* NOTREACHED */ 691 } 692 693 static void 694 check_console(struct lwp *l) 695 { 696 struct vnode *vp; 697 int error; 698 699 error = namei_simple_kernel("/dev/console", 700 NSM_FOLLOW_NOEMULROOT, &vp); 701 if (error == 0) 702 vrele(vp); 703 else if (error == ENOENT) 704 printf("warning: no /dev/console\n"); 705 else 706 printf("warning: lookup /dev/console: error %d\n", error); 707 } 708 709 /* 710 * List of paths to try when searching for "init". 711 */ 712 static const char * const initpaths[] = { 713 "/sbin/init", 714 "/sbin/oinit", 715 "/sbin/init.bak", 716 NULL, 717 }; 718 719 /* 720 * Start the initial user process; try exec'ing each pathname in "initpaths". 721 * The program is invoked with one argument containing the boot flags. 722 */ 723 static void 724 start_init(void *arg) 725 { 726 struct lwp *l = arg; 727 struct proc *p = l->l_proc; 728 vaddr_t addr; 729 struct sys_execve_args /* { 730 syscallarg(const char *) path; 731 syscallarg(char * const *) argp; 732 syscallarg(char * const *) envp; 733 } */ args; 734 int options, i, error; 735 register_t retval[2]; 736 char flags[4], *flagsp; 737 const char *path, *slash; 738 char *ucp, **uap, *arg0, *arg1 = NULL; 739 char ipath[129]; 740 int ipx, len; 741 742 /* 743 * Now in process 1. 744 */ 745 strncpy(p->p_comm, "init", MAXCOMLEN); 746 747 /* 748 * Wait for main() to tell us that it's safe to exec. 749 */ 750 mutex_enter(proc_lock); 751 while (start_init_exec == 0) 752 cv_wait(&lbolt, proc_lock); 753 mutex_exit(proc_lock); 754 755 /* 756 * This is not the right way to do this. We really should 757 * hand-craft a descriptor onto /dev/console to hand to init, 758 * but that's a _lot_ more work, and the benefit from this easy 759 * hack makes up for the "good is the enemy of the best" effect. 760 */ 761 check_console(l); 762 763 /* 764 * Need just enough stack to hold the faked-up "execve()" arguments. 765 */ 766 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 767 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 768 NULL, UVM_UNKNOWN_OFFSET, 0, 769 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 770 UVM_ADV_NORMAL, 771 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 772 panic("init: couldn't allocate argument space"); 773 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 774 775 ipx = 0; 776 while (1) { 777 if (boothowto & RB_ASKNAME) { 778 printf("init path"); 779 if (initpaths[ipx]) 780 printf(" (default %s)", initpaths[ipx]); 781 printf(": "); 782 len = cngetsn(ipath, sizeof(ipath)-1); 783 if (len == 4 && strcmp(ipath, "halt") == 0) { 784 cpu_reboot(RB_HALT, NULL); 785 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 786 cpu_reboot(0, NULL); 787 #if defined(DDB) 788 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 789 console_debugger(); 790 continue; 791 #endif 792 } else if (len > 0 && ipath[0] == '/') { 793 ipath[len] = '\0'; 794 path = ipath; 795 } else if (len == 0 && initpaths[ipx] != NULL) { 796 path = initpaths[ipx++]; 797 } else { 798 printf("use absolute path, "); 799 #if defined(DDB) 800 printf("\"ddb\", "); 801 #endif 802 printf("\"halt\", or \"reboot\"\n"); 803 continue; 804 } 805 } else { 806 if ((path = initpaths[ipx++]) == NULL) { 807 ipx = 0; 808 boothowto |= RB_ASKNAME; 809 continue; 810 } 811 } 812 813 ucp = (char *)USRSTACK; 814 815 /* 816 * Construct the boot flag argument. 817 */ 818 flagsp = flags; 819 *flagsp++ = '-'; 820 options = 0; 821 822 if (boothowto & RB_SINGLE) { 823 *flagsp++ = 's'; 824 options = 1; 825 } 826 #ifdef notyet 827 if (boothowto & RB_FASTBOOT) { 828 *flagsp++ = 'f'; 829 options = 1; 830 } 831 #endif 832 833 /* 834 * Move out the flags (arg 1), if necessary. 835 */ 836 if (options != 0) { 837 *flagsp++ = '\0'; 838 i = flagsp - flags; 839 #ifdef DEBUG 840 printf("init: copying out flags `%s' %d\n", flags, i); 841 #endif 842 arg1 = STACK_ALLOC(ucp, i); 843 ucp = STACK_MAX(arg1, i); 844 (void)copyout((void *)flags, arg1, i); 845 } 846 847 /* 848 * Move out the file name (also arg 0). 849 */ 850 i = strlen(path) + 1; 851 #ifdef DEBUG 852 printf("init: copying out path `%s' %d\n", path, i); 853 #else 854 if (boothowto & RB_ASKNAME || path != initpaths[0]) 855 printf("init: trying %s\n", path); 856 #endif 857 arg0 = STACK_ALLOC(ucp, i); 858 ucp = STACK_MAX(arg0, i); 859 (void)copyout(path, arg0, i); 860 861 /* 862 * Move out the arg pointers. 863 */ 864 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 865 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 866 SCARG(&args, path) = arg0; 867 SCARG(&args, argp) = uap; 868 SCARG(&args, envp) = NULL; 869 slash = strrchr(path, '/'); 870 if (slash) 871 (void)suword((void *)uap++, 872 (long)arg0 + (slash + 1 - path)); 873 else 874 (void)suword((void *)uap++, (long)arg0); 875 if (options != 0) 876 (void)suword((void *)uap++, (long)arg1); 877 (void)suword((void *)uap++, 0); /* terminator */ 878 879 /* 880 * Now try to exec the program. If can't for any reason 881 * other than it doesn't exist, complain. 882 */ 883 error = sys_execve(l, &args, retval); 884 if (error == 0 || error == EJUSTRETURN) { 885 KERNEL_UNLOCK_LAST(l); 886 return; 887 } 888 printf("exec %s: error %d\n", path, error); 889 } 890 printf("init: not found\n"); 891 panic("no init"); 892 } 893 894 /* 895 * calculate cache size from physmem and vm_map size. 896 */ 897 vaddr_t 898 calc_cache_size(struct vm_map *map, int pct, int va_pct) 899 { 900 paddr_t t; 901 902 /* XXX should consider competing cache if any */ 903 /* XXX should consider submaps */ 904 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 905 if (map != NULL) { 906 vsize_t vsize; 907 908 vsize = vm_map_max(map) - vm_map_min(map); 909 vsize = (uintmax_t)vsize * va_pct / 100; 910 if (t > vsize) { 911 t = vsize; 912 } 913 } 914 return t; 915 } 916 917 /* 918 * Print the system start up banner. 919 * 920 * - Print a limited banner if AB_SILENT. 921 * - Always send normal banner to the log. 922 */ 923 #define MEM_PBUFSIZE sizeof("99999 MB") 924 925 void 926 banner(void) 927 { 928 static char notice[] = " Notice: this software is " 929 "protected by copyright"; 930 char pbuf[81]; 931 void (*pr)(const char *, ...); 932 int i; 933 934 if ((boothowto & AB_SILENT) != 0) { 935 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 936 ostype, osrelease, kernel_ident); 937 printf("%s", pbuf); 938 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 939 printf(" "); 940 printf("%s\n", notice); 941 pr = aprint_normal; 942 } else { 943 pr = printf; 944 } 945 946 memset(pbuf, 0, sizeof(pbuf)); 947 (*pr)("%s%s", copyright, version); 948 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 949 (*pr)("total memory = %s\n", pbuf); 950 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 951 (*pr)("avail memory = %s\n", pbuf); 952 } 953
Indexes created Mon Sep 22 10:09:38 GMT 2025