init_main.c revision 1.356
1 /* $NetBSD: init_main.c,v 1.356 2008/05/27 17:50:03 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 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 1.356 2008/05/27 17:50:03 ad Exp $"); 101 102 #include "opt_ipsec.h" 103 #include "opt_ntp.h" 104 #include "opt_pipe.h" 105 #include "opt_posix.h" 106 #include "opt_syscall_debug.h" 107 #include "opt_sysv.h" 108 #include "opt_fileassoc.h" 109 #include "opt_ktrace.h" 110 #include "opt_pax.h" 111 112 #include "rnd.h" 113 #include "sysmon_envsys.h" 114 #include "sysmon_power.h" 115 #include "sysmon_taskq.h" 116 #include "sysmon_wdog.h" 117 #include "veriexec.h" 118 119 #include <sys/param.h> 120 #include <sys/acct.h> 121 #include <sys/filedesc.h> 122 #include <sys/file.h> 123 #include <sys/errno.h> 124 #include <sys/callout.h> 125 #include <sys/cpu.h> 126 #include <sys/kernel.h> 127 #include <sys/kmem.h> 128 #include <sys/mount.h> 129 #include <sys/proc.h> 130 #include <sys/kthread.h> 131 #include <sys/resourcevar.h> 132 #include <sys/signalvar.h> 133 #include <sys/systm.h> 134 #include <sys/vnode.h> 135 #include <sys/fstrans.h> 136 #include <sys/tty.h> 137 #include <sys/conf.h> 138 #include <sys/disklabel.h> 139 #include <sys/buf.h> 140 #include <sys/device.h> 141 #include <sys/exec.h> 142 #include <sys/socketvar.h> 143 #include <sys/protosw.h> 144 #include <sys/percpu.h> 145 #include <sys/pset.h> 146 #include <sys/sysctl.h> 147 #include <sys/reboot.h> 148 #include <sys/user.h> 149 #include <sys/sysctl.h> 150 #include <sys/event.h> 151 #include <sys/mbuf.h> 152 #include <sys/sched.h> 153 #include <sys/sleepq.h> 154 #include <sys/iostat.h> 155 #include <sys/vmem.h> 156 #include <sys/uuid.h> 157 #include <sys/extent.h> 158 #include <sys/disk.h> 159 #include <sys/mqueue.h> 160 #include <sys/msgbuf.h> 161 #include <sys/module.h> 162 #include <sys/event.h> 163 #ifdef FAST_IPSEC 164 #include <netipsec/ipsec.h> 165 #endif 166 #ifdef SYSVSHM 167 #include <sys/shm.h> 168 #endif 169 #ifdef SYSVSEM 170 #include <sys/sem.h> 171 #endif 172 #ifdef SYSVMSG 173 #include <sys/msg.h> 174 #endif 175 #ifdef P1003_1B_SEMAPHORE 176 #include <sys/ksem.h> 177 #endif 178 #include <sys/domain.h> 179 #include <sys/namei.h> 180 #if NRND > 0 181 #include <sys/rnd.h> 182 #endif 183 #include <sys/pipe.h> 184 #ifdef LKM 185 #include <sys/lkm.h> 186 #endif 187 #if NVERIEXEC > 0 188 #include <sys/verified_exec.h> 189 #endif /* NVERIEXEC > 0 */ 190 #ifdef KTRACE 191 #include <sys/ktrace.h> 192 #endif 193 #include <sys/kauth.h> 194 #include <net80211/ieee80211_netbsd.h> 195 196 #include <sys/syscall.h> 197 #include <sys/syscallargs.h> 198 199 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 200 #include <sys/pax.h> 201 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 202 203 #include <ufs/ufs/quota.h> 204 205 #include <miscfs/genfs/genfs.h> 206 #include <miscfs/syncfs/syncfs.h> 207 208 #include <sys/cpu.h> 209 210 #include <uvm/uvm.h> 211 212 #if NSYSMON_TASKQ > 0 213 #include <dev/sysmon/sysmon_taskq.h> 214 #endif 215 216 #include <dev/cons.h> 217 218 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 219 #include <dev/sysmon/sysmonvar.h> 220 #endif 221 222 #include <net/if.h> 223 #include <net/raw_cb.h> 224 225 #include <secmodel/secmodel.h> 226 227 extern struct proc proc0; 228 extern struct lwp lwp0; 229 extern struct cwdinfo cwdi0; 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 = 1; /* still working on startup */ 240 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 241 242 int start_init_exec; /* semaphore for start_init() */ 243 244 static void check_console(struct lwp *l); 245 static void start_init(void *); 246 void main(void); 247 void ssp_init(void); 248 249 #if defined(__SSP__) || defined(__SSP_ALL__) 250 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 251 void __stack_chk_fail(void); 252 253 void 254 __stack_chk_fail(void) 255 { 256 panic("stack overflow detected; terminated"); 257 } 258 259 void 260 ssp_init(void) 261 { 262 int s; 263 264 #ifdef DIAGNOSTIC 265 printf("Initializing SSP:"); 266 #endif 267 /* 268 * We initialize ssp here carefully: 269 * 1. after we got some entropy 270 * 2. without calling a function 271 */ 272 size_t i; 273 long guard[__arraycount(__stack_chk_guard)]; 274 275 arc4randbytes(guard, sizeof(guard)); 276 s = splhigh(); 277 for (i = 0; i < __arraycount(guard); i++) 278 __stack_chk_guard[i] = guard[i]; 279 splx(s); 280 #ifdef DIAGNOSTIC 281 for (i = 0; i < __arraycount(guard); i++) 282 printf("%lx ", guard[i]); 283 printf("\n"); 284 #endif 285 } 286 #else 287 void 288 ssp_init(void) 289 { 290 291 } 292 #endif 293 294 void __secmodel_none(void); 295 __weak_alias(secmodel_start,__secmodel_none); 296 void 297 __secmodel_none(void) 298 { 299 return; 300 } 301 302 /* 303 * System startup; initialize the world, create process 0, mount root 304 * filesystem, and fork to create init and pagedaemon. Most of the 305 * hard work is done in the lower-level initialization routines including 306 * startup(), which does memory initialization and autoconfiguration. 307 */ 308 void 309 main(void) 310 { 311 struct timeval time; 312 struct lwp *l; 313 struct proc *p; 314 int s, error; 315 #ifdef NVNODE_IMPLICIT 316 int usevnodes; 317 #endif 318 CPU_INFO_ITERATOR cii; 319 struct cpu_info *ci; 320 321 l = &lwp0; 322 #ifndef LWP0_CPU_INFO 323 l->l_cpu = curcpu(); 324 #endif 325 326 /* 327 * Attempt to find console and initialize 328 * in case of early panic or other messages. 329 */ 330 consinit(); 331 332 kernel_lock_init(); 333 334 uvm_init(); 335 336 kmem_init(); 337 338 percpu_init(); 339 340 /* Initialize lock caches. */ 341 mutex_obj_init(); 342 343 /* Initialize the extent manager. */ 344 extent_init(); 345 346 /* Do machine-dependent initialization. */ 347 cpu_startup(); 348 349 /* Initialize callouts, part 1. */ 350 callout_startup(); 351 352 /* 353 * Initialize the kernel authorization subsystem and start the 354 * default security model, if any. We need to do this early 355 * enough so that subsystems relying on any of the aforementioned 356 * can work properly. Since the security model may dictate the 357 * credential inheritance policy, it is needed at least before 358 * any process is created, specifically proc0. 359 */ 360 kauth_init(); 361 secmodel_start(); 362 363 /* Initialize the buffer cache */ 364 bufinit(); 365 366 /* Initialize sockets. */ 367 soinit(); 368 369 /* 370 * The following things must be done before autoconfiguration. 371 */ 372 evcnt_init(); /* initialize event counters */ 373 #if NRND > 0 374 rnd_init(); /* initialize RNG */ 375 #endif 376 377 /* Initialize process and pgrp structures. */ 378 procinit(); 379 lwpinit(); 380 381 /* Initialize signal-related data structures. */ 382 signal_init(); 383 384 /* Initialize resource management. */ 385 resource_init(); 386 387 /* Create process 0 (the swapper). */ 388 proc0_init(); 389 390 /* Initialize the UID hash table. */ 391 uid_init(); 392 393 /* Charge root for one process. */ 394 (void)chgproccnt(0, 1); 395 396 /* Initialize timekeeping. */ 397 time_init(); 398 399 /* Initialize the run queues, turnstiles and sleep queues. */ 400 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 401 sched_rqinit(); 402 turnstile_init(); 403 sleeptab_init(&sleeptab); 404 405 /* Initialize processor-sets */ 406 psets_init(); 407 408 /* MI initialization of the boot cpu */ 409 error = mi_cpu_attach(curcpu()); 410 KASSERT(error == 0); 411 412 /* Initialize timekeeping, part 2. */ 413 time_init2(); 414 415 /* 416 * Initialize mbuf's. Do this now because we might attempt to 417 * allocate mbufs or mbuf clusters during autoconfiguration. 418 */ 419 mbinit(); 420 421 /* Initialize the sysctl subsystem. */ 422 sysctl_init(); 423 424 /* Initialize I/O statistics. */ 425 iostat_init(); 426 427 /* Initialize the log device. */ 428 loginit(); 429 430 /* Start module system. */ 431 module_init(); 432 433 /* Initialize the file systems. */ 434 #ifdef NVNODE_IMPLICIT 435 /* 436 * If maximum number of vnodes in namei vnode cache is not explicitly 437 * defined in kernel config, adjust the number such as we use roughly 438 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 439 */ 440 usevnodes = 441 calc_cache_size(kernel_map, 1, VNODE_VA_MAXPCT) / sizeof(vnode_t); 442 if (usevnodes > desiredvnodes) 443 desiredvnodes = usevnodes; 444 #endif 445 vfsinit(); 446 447 /* Initialize fstrans. */ 448 fstrans_init(); 449 450 /* Initialize the file descriptor system. */ 451 fd_sys_init(); 452 453 /* Initialize kqueue. */ 454 kqueue_init(); 455 456 /* Initialize asynchronous I/O. */ 457 aio_sysinit(); 458 459 /* Initialize message queues. */ 460 mqueue_sysinit(); 461 462 /* Initialize the system monitor subsystems. */ 463 #if NSYSMON_TASKQ > 0 464 sysmon_task_queue_preinit(); 465 #endif 466 467 #if NSYSMON_ENVSYS > 0 468 sysmon_envsys_init(); 469 #endif 470 471 #if NSYSMON_POWER > 0 472 sysmon_power_init(); 473 #endif 474 475 #if NSYSMON_WDOG > 0 476 sysmon_wdog_init(); 477 #endif 478 479 inittimecounter(); 480 ntp_init(); 481 482 /* Initialize the device switch tables. */ 483 devsw_init(); 484 485 /* Initialize tty subsystem. */ 486 tty_init(); 487 ttyldisc_init(); 488 489 /* Initialize the buffer cache, part 2. */ 490 bufinit2(); 491 492 /* Initialize the disk wedge subsystem. */ 493 dkwedge_init(); 494 495 /* Configure the system hardware. This will enable interrupts. */ 496 configure(); 497 498 ubc_init(); /* must be after autoconfig */ 499 500 #ifdef SYSVSHM 501 /* Initialize System V style shared memory. */ 502 shminit(); 503 #endif 504 505 #ifdef SYSVSEM 506 /* Initialize System V style semaphores. */ 507 seminit(); 508 #endif 509 510 #ifdef SYSVMSG 511 /* Initialize System V style message queues. */ 512 msginit(); 513 #endif 514 515 #ifdef P1003_1B_SEMAPHORE 516 /* Initialize posix semaphores */ 517 ksem_init(); 518 #endif 519 520 #if NVERIEXEC > 0 521 /* 522 * Initialise the Veriexec subsystem. 523 */ 524 veriexec_init(); 525 #endif /* NVERIEXEC > 0 */ 526 527 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 528 pax_init(); 529 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 530 531 #ifdef FAST_IPSEC 532 /* Attach network crypto subsystem */ 533 ipsec_attach(); 534 #endif 535 536 /* 537 * Initialize protocols. Block reception of incoming packets 538 * until everything is ready. 539 */ 540 s = splnet(); 541 ifinit(); 542 domaininit(); 543 if_attachdomain(); 544 splx(s); 545 546 #ifdef GPROF 547 /* Initialize kernel profiling. */ 548 kmstartup(); 549 #endif 550 551 /* Initialize system accounting. */ 552 acct_init(); 553 554 #ifndef PIPE_SOCKETPAIR 555 /* Initialize pipes. */ 556 pipe_init(); 557 #endif 558 559 #ifdef KTRACE 560 /* Initialize ktrace. */ 561 ktrinit(); 562 #endif 563 564 /* Initialize the UUID system calls. */ 565 uuid_init(); 566 567 /* 568 * Create process 1 (init(8)). We do this now, as Unix has 569 * historically had init be process 1, and changing this would 570 * probably upset a lot of people. 571 * 572 * Note that process 1 won't immediately exec init(8), but will 573 * wait for us to inform it that the root file system has been 574 * mounted. 575 */ 576 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 577 panic("fork init"); 578 579 /* 580 * Load any remaining builtin modules, and hand back temporary 581 * storage to the VM system. 582 */ 583 module_init_class(MODULE_CLASS_ANY); 584 module_jettison(); 585 586 /* 587 * Finalize configuration now that all real devices have been 588 * found. This needs to be done before the root device is 589 * selected, since finalization may create the root device. 590 */ 591 config_finalize(); 592 593 /* 594 * Now that autoconfiguration has completed, we can determine 595 * the root and dump devices. 596 */ 597 cpu_rootconf(); 598 cpu_dumpconf(); 599 600 /* Mount the root file system. */ 601 do { 602 domountroothook(); 603 if ((error = vfs_mountroot())) { 604 printf("cannot mount root, error = %d\n", error); 605 boothowto |= RB_ASKNAME; 606 setroot(root_device, 607 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 608 } 609 } while (error != 0); 610 mountroothook_destroy(); 611 612 /* 613 * Initialise the time-of-day clock, passing the time recorded 614 * in the root filesystem (if any) for use by systems that 615 * don't have a non-volatile time-of-day device. 616 */ 617 inittodr(rootfstime); 618 619 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 620 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 621 622 /* 623 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 624 * reference it. 625 */ 626 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 627 if (error) 628 panic("cannot find root vnode, error=%d", error); 629 cwdi0.cwdi_cdir = rootvnode; 630 VREF(cwdi0.cwdi_cdir); 631 VOP_UNLOCK(rootvnode, 0); 632 cwdi0.cwdi_rdir = NULL; 633 634 /* 635 * Now that root is mounted, we can fixup initproc's CWD 636 * info. All other processes are kthreads, which merely 637 * share proc0's CWD info. 638 */ 639 initproc->p_cwdi->cwdi_cdir = rootvnode; 640 VREF(initproc->p_cwdi->cwdi_cdir); 641 initproc->p_cwdi->cwdi_rdir = NULL; 642 643 /* 644 * Now can look at time, having had a chance to verify the time 645 * from the file system. Reset l->l_rtime as it may have been 646 * munched in mi_switch() after the time got set. 647 */ 648 getmicrotime(&time); 649 boottime = time; 650 mutex_enter(proc_lock); 651 LIST_FOREACH(p, &allproc, p_list) { 652 KASSERT((p->p_flag & PK_MARKER) == 0); 653 mutex_enter(p->p_lock); 654 p->p_stats->p_start = time; 655 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 656 lwp_lock(l); 657 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 658 lwp_unlock(l); 659 } 660 mutex_exit(p->p_lock); 661 } 662 mutex_exit(proc_lock); 663 binuptime(&curlwp->l_stime); 664 665 for (CPU_INFO_FOREACH(cii, ci)) { 666 ci->ci_schedstate.spc_lastmod = time_second; 667 } 668 669 /* Create the pageout daemon kernel thread. */ 670 uvm_swap_init(); 671 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 672 NULL, NULL, "pgdaemon")) 673 panic("fork pagedaemon"); 674 675 /* Create the filesystem syncer kernel thread. */ 676 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 677 NULL, NULL, "ioflush")) 678 panic("fork syncer"); 679 680 /* Create the aiodone daemon kernel thread. */ 681 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 682 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 683 panic("fork aiodoned"); 684 685 vmem_rehash_start(); 686 687 /* Initialize exec structures */ 688 exec_init(1); 689 690 /* 691 * Okay, now we can let init(8) exec! It's off to userland! 692 */ 693 mutex_enter(proc_lock); 694 start_init_exec = 1; 695 cv_broadcast(&lbolt); 696 mutex_exit(proc_lock); 697 698 /* The scheduler is an infinite loop. */ 699 uvm_scheduler(); 700 /* NOTREACHED */ 701 } 702 703 static void 704 check_console(struct lwp *l) 705 { 706 struct nameidata nd; 707 int error; 708 709 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 710 error = namei(&nd); 711 if (error == 0) 712 vrele(nd.ni_vp); 713 else if (error == ENOENT) 714 printf("warning: no /dev/console\n"); 715 else 716 printf("warning: lookup /dev/console: error %d\n", error); 717 } 718 719 /* 720 * List of paths to try when searching for "init". 721 */ 722 static const char * const initpaths[] = { 723 "/sbin/init", 724 "/sbin/oinit", 725 "/sbin/init.bak", 726 NULL, 727 }; 728 729 /* 730 * Start the initial user process; try exec'ing each pathname in "initpaths". 731 * The program is invoked with one argument containing the boot flags. 732 */ 733 static void 734 start_init(void *arg) 735 { 736 struct lwp *l = arg; 737 struct proc *p = l->l_proc; 738 vaddr_t addr; 739 struct sys_execve_args /* { 740 syscallarg(const char *) path; 741 syscallarg(char * const *) argp; 742 syscallarg(char * const *) envp; 743 } */ args; 744 int options, i, error; 745 register_t retval[2]; 746 char flags[4], *flagsp; 747 const char *path, *slash; 748 char *ucp, **uap, *arg0, *arg1 = NULL; 749 char ipath[129]; 750 int ipx, len; 751 752 /* 753 * Now in process 1. 754 */ 755 strncpy(p->p_comm, "init", MAXCOMLEN); 756 757 /* 758 * Wait for main() to tell us that it's safe to exec. 759 */ 760 mutex_enter(proc_lock); 761 while (start_init_exec == 0) 762 cv_wait(&lbolt, proc_lock); 763 mutex_exit(proc_lock); 764 765 /* 766 * This is not the right way to do this. We really should 767 * hand-craft a descriptor onto /dev/console to hand to init, 768 * but that's a _lot_ more work, and the benefit from this easy 769 * hack makes up for the "good is the enemy of the best" effect. 770 */ 771 check_console(l); 772 773 /* 774 * Need just enough stack to hold the faked-up "execve()" arguments. 775 */ 776 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 777 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 778 NULL, UVM_UNKNOWN_OFFSET, 0, 779 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 780 UVM_ADV_NORMAL, 781 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 782 panic("init: couldn't allocate argument space"); 783 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 784 785 ipx = 0; 786 while (1) { 787 if (boothowto & RB_ASKNAME) { 788 printf("init path"); 789 if (initpaths[ipx]) 790 printf(" (default %s)", initpaths[ipx]); 791 printf(": "); 792 len = cngetsn(ipath, sizeof(ipath)-1); 793 if (len == 0) { 794 if (initpaths[ipx]) 795 path = initpaths[ipx++]; 796 else 797 continue; 798 } else { 799 ipath[len] = '\0'; 800 path = ipath; 801 } 802 } else { 803 if ((path = initpaths[ipx++]) == NULL) 804 break; 805 } 806 807 ucp = (char *)USRSTACK; 808 809 /* 810 * Construct the boot flag argument. 811 */ 812 flagsp = flags; 813 *flagsp++ = '-'; 814 options = 0; 815 816 if (boothowto & RB_SINGLE) { 817 *flagsp++ = 's'; 818 options = 1; 819 } 820 #ifdef notyet 821 if (boothowto & RB_FASTBOOT) { 822 *flagsp++ = 'f'; 823 options = 1; 824 } 825 #endif 826 827 /* 828 * Move out the flags (arg 1), if necessary. 829 */ 830 if (options != 0) { 831 *flagsp++ = '\0'; 832 i = flagsp - flags; 833 #ifdef DEBUG 834 printf("init: copying out flags `%s' %d\n", flags, i); 835 #endif 836 arg1 = STACK_ALLOC(ucp, i); 837 ucp = STACK_MAX(arg1, i); 838 (void)copyout((void *)flags, arg1, i); 839 } 840 841 /* 842 * Move out the file name (also arg 0). 843 */ 844 i = strlen(path) + 1; 845 #ifdef DEBUG 846 printf("init: copying out path `%s' %d\n", path, i); 847 #else 848 if (boothowto & RB_ASKNAME || path != initpaths[0]) 849 printf("init: trying %s\n", path); 850 #endif 851 arg0 = STACK_ALLOC(ucp, i); 852 ucp = STACK_MAX(arg0, i); 853 (void)copyout(path, arg0, i); 854 855 /* 856 * Move out the arg pointers. 857 */ 858 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 859 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 860 SCARG(&args, path) = arg0; 861 SCARG(&args, argp) = uap; 862 SCARG(&args, envp) = NULL; 863 slash = strrchr(path, '/'); 864 if (slash) 865 (void)suword((void *)uap++, 866 (long)arg0 + (slash + 1 - path)); 867 else 868 (void)suword((void *)uap++, (long)arg0); 869 if (options != 0) 870 (void)suword((void *)uap++, (long)arg1); 871 (void)suword((void *)uap++, 0); /* terminator */ 872 873 /* 874 * Now try to exec the program. If can't for any reason 875 * other than it doesn't exist, complain. 876 */ 877 error = sys_execve(l, &args, retval); 878 if (error == 0 || error == EJUSTRETURN) { 879 KERNEL_UNLOCK_LAST(l); 880 return; 881 } 882 printf("exec %s: error %d\n", path, error); 883 } 884 printf("init: not found\n"); 885 panic("no init"); 886 } 887 888 /* 889 * calculate cache size from physmem and vm_map size. 890 */ 891 vaddr_t 892 calc_cache_size(struct vm_map *map, int pct, int va_pct) 893 { 894 paddr_t t; 895 896 /* XXX should consider competing cache if any */ 897 /* XXX should consider submaps */ 898 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 899 if (map != NULL) { 900 vsize_t vsize; 901 902 vsize = vm_map_max(map) - vm_map_min(map); 903 vsize = (uintmax_t)vsize * va_pct / 100; 904 if (t > vsize) { 905 t = vsize; 906 } 907 } 908 return t; 909 } 910
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