init_main.c revision 1.359
1 /* $NetBSD: init_main.c,v 1.359 2008/06/16 11:26:28 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 1.359 2008/06/16 11:26:28 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 #include <sys/lockf.h> 164 #ifdef FAST_IPSEC 165 #include <netipsec/ipsec.h> 166 #endif 167 #ifdef SYSVSHM 168 #include <sys/shm.h> 169 #endif 170 #ifdef SYSVSEM 171 #include <sys/sem.h> 172 #endif 173 #ifdef SYSVMSG 174 #include <sys/msg.h> 175 #endif 176 #ifdef P1003_1B_SEMAPHORE 177 #include <sys/ksem.h> 178 #endif 179 #include <sys/domain.h> 180 #include <sys/namei.h> 181 #if NRND > 0 182 #include <sys/rnd.h> 183 #endif 184 #include <sys/pipe.h> 185 #ifdef LKM 186 #include <sys/lkm.h> 187 #endif 188 #if NVERIEXEC > 0 189 #include <sys/verified_exec.h> 190 #endif /* NVERIEXEC > 0 */ 191 #ifdef KTRACE 192 #include <sys/ktrace.h> 193 #endif 194 #include <sys/kauth.h> 195 #include <net80211/ieee80211_netbsd.h> 196 197 #include <sys/syscall.h> 198 #include <sys/syscallargs.h> 199 200 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 201 #include <sys/pax.h> 202 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 203 204 #include <ufs/ufs/quota.h> 205 206 #include <miscfs/genfs/genfs.h> 207 #include <miscfs/syncfs/syncfs.h> 208 209 #include <sys/cpu.h> 210 211 #include <uvm/uvm.h> 212 213 #if NSYSMON_TASKQ > 0 214 #include <dev/sysmon/sysmon_taskq.h> 215 #endif 216 217 #include <dev/cons.h> 218 219 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 220 #include <dev/sysmon/sysmonvar.h> 221 #endif 222 223 #include <net/if.h> 224 #include <net/raw_cb.h> 225 226 #include <secmodel/secmodel.h> 227 228 extern struct proc proc0; 229 extern struct lwp lwp0; 230 extern struct cwdinfo cwdi0; 231 extern time_t rootfstime; 232 233 #ifndef curlwp 234 struct lwp *curlwp = &lwp0; 235 #endif 236 struct proc *initproc; 237 238 struct vnode *rootvp, *swapdev_vp; 239 int boothowto; 240 int cold = 1; /* still working on startup */ 241 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 242 243 int start_init_exec; /* semaphore for start_init() */ 244 245 static void check_console(struct lwp *l); 246 static void start_init(void *); 247 void main(void); 248 void ssp_init(void); 249 250 #if defined(__SSP__) || defined(__SSP_ALL__) 251 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 252 void __stack_chk_fail(void); 253 254 void 255 __stack_chk_fail(void) 256 { 257 panic("stack overflow detected; terminated"); 258 } 259 260 void 261 ssp_init(void) 262 { 263 int s; 264 265 #ifdef DIAGNOSTIC 266 printf("Initializing SSP:"); 267 #endif 268 /* 269 * We initialize ssp here carefully: 270 * 1. after we got some entropy 271 * 2. without calling a function 272 */ 273 size_t i; 274 long guard[__arraycount(__stack_chk_guard)]; 275 276 arc4randbytes(guard, sizeof(guard)); 277 s = splhigh(); 278 for (i = 0; i < __arraycount(guard); i++) 279 __stack_chk_guard[i] = guard[i]; 280 splx(s); 281 #ifdef DIAGNOSTIC 282 for (i = 0; i < __arraycount(guard); i++) 283 printf("%lx ", guard[i]); 284 printf("\n"); 285 #endif 286 } 287 #else 288 void 289 ssp_init(void) 290 { 291 292 } 293 #endif 294 295 void __secmodel_none(void); 296 __weak_alias(secmodel_start,__secmodel_none); 297 void 298 __secmodel_none(void) 299 { 300 return; 301 } 302 303 /* 304 * System startup; initialize the world, create process 0, mount root 305 * filesystem, and fork to create init and pagedaemon. Most of the 306 * hard work is done in the lower-level initialization routines including 307 * startup(), which does memory initialization and autoconfiguration. 308 */ 309 void 310 main(void) 311 { 312 struct timeval time; 313 struct lwp *l; 314 struct proc *p; 315 int s, error; 316 #ifdef NVNODE_IMPLICIT 317 int usevnodes; 318 #endif 319 CPU_INFO_ITERATOR cii; 320 struct cpu_info *ci; 321 322 l = &lwp0; 323 #ifndef LWP0_CPU_INFO 324 l->l_cpu = curcpu(); 325 #endif 326 327 /* 328 * Attempt to find console and initialize 329 * in case of early panic or other messages. 330 */ 331 consinit(); 332 333 kernel_lock_init(); 334 335 uvm_init(); 336 337 kmem_init(); 338 339 percpu_init(); 340 341 /* Initialize lock caches. */ 342 mutex_obj_init(); 343 344 /* Initialize the extent manager. */ 345 extent_init(); 346 347 /* Do machine-dependent initialization. */ 348 cpu_startup(); 349 350 /* Initialize callouts, part 1. */ 351 callout_startup(); 352 353 /* 354 * Initialize the kernel authorization subsystem and start the 355 * default security model, if any. We need to do this early 356 * enough so that subsystems relying on any of the aforementioned 357 * can work properly. Since the security model may dictate the 358 * credential inheritance policy, it is needed at least before 359 * any process is created, specifically proc0. 360 */ 361 kauth_init(); 362 secmodel_start(); 363 364 /* Initialize the buffer cache */ 365 bufinit(); 366 367 /* Initialize sockets. */ 368 soinit(); 369 370 /* 371 * The following things must be done before autoconfiguration. 372 */ 373 evcnt_init(); /* initialize event counters */ 374 #if NRND > 0 375 rnd_init(); /* initialize RNG */ 376 #endif 377 378 /* Initialize process and pgrp structures. */ 379 procinit(); 380 lwpinit(); 381 382 /* Initialize signal-related data structures. */ 383 signal_init(); 384 385 /* Initialize resource management. */ 386 resource_init(); 387 388 /* Create process 0 (the swapper). */ 389 proc0_init(); 390 391 /* Initialize the UID hash table. */ 392 uid_init(); 393 394 /* Charge root for one process. */ 395 (void)chgproccnt(0, 1); 396 397 /* Initialize timekeeping. */ 398 time_init(); 399 400 /* Initialize the run queues, turnstiles and sleep queues. */ 401 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 402 sched_rqinit(); 403 turnstile_init(); 404 sleeptab_init(&sleeptab); 405 406 /* Initialize processor-sets */ 407 psets_init(); 408 409 /* MI initialization of the boot cpu */ 410 error = mi_cpu_attach(curcpu()); 411 KASSERT(error == 0); 412 413 /* Initialize timekeeping, part 2. */ 414 time_init2(); 415 416 /* 417 * Initialize mbuf's. Do this now because we might attempt to 418 * allocate mbufs or mbuf clusters during autoconfiguration. 419 */ 420 mbinit(); 421 422 /* Initialize the sysctl subsystem. */ 423 sysctl_init(); 424 425 /* Initialize I/O statistics. */ 426 iostat_init(); 427 428 /* Initialize the log device. */ 429 loginit(); 430 431 /* Start module system. */ 432 module_init(); 433 434 /* Initialize the file systems. */ 435 #ifdef NVNODE_IMPLICIT 436 /* 437 * If maximum number of vnodes in namei vnode cache is not explicitly 438 * defined in kernel config, adjust the number such as we use roughly 439 * 10% of memory for vnodes and associated data structures in the 440 * assumed worst case. Do not provide fewer than NVNODE vnodes. 441 */ 442 usevnodes = 443 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 444 if (usevnodes > desiredvnodes) 445 desiredvnodes = usevnodes; 446 #endif 447 vfsinit(); 448 lf_init(); 449 450 /* Initialize fstrans. */ 451 fstrans_init(); 452 453 /* Initialize the file descriptor system. */ 454 fd_sys_init(); 455 456 /* Initialize kqueue. */ 457 kqueue_init(); 458 459 /* Initialize asynchronous I/O. */ 460 aio_sysinit(); 461 462 /* Initialize message queues. */ 463 mqueue_sysinit(); 464 465 /* Initialize the system monitor subsystems. */ 466 #if NSYSMON_TASKQ > 0 467 sysmon_task_queue_preinit(); 468 #endif 469 470 #if NSYSMON_ENVSYS > 0 471 sysmon_envsys_init(); 472 #endif 473 474 #if NSYSMON_POWER > 0 475 sysmon_power_init(); 476 #endif 477 478 #if NSYSMON_WDOG > 0 479 sysmon_wdog_init(); 480 #endif 481 482 inittimecounter(); 483 ntp_init(); 484 485 /* Initialize the device switch tables. */ 486 devsw_init(); 487 488 /* Initialize tty subsystem. */ 489 tty_init(); 490 ttyldisc_init(); 491 492 /* Initialize the buffer cache, part 2. */ 493 bufinit2(); 494 495 /* Initialize the disk wedge subsystem. */ 496 dkwedge_init(); 497 498 /* Configure the system hardware. This will enable interrupts. */ 499 configure(); 500 501 ubc_init(); /* must be after autoconfig */ 502 503 #ifdef SYSVSHM 504 /* Initialize System V style shared memory. */ 505 shminit(); 506 #endif 507 508 #ifdef SYSVSEM 509 /* Initialize System V style semaphores. */ 510 seminit(); 511 #endif 512 513 #ifdef SYSVMSG 514 /* Initialize System V style message queues. */ 515 msginit(); 516 #endif 517 518 #ifdef P1003_1B_SEMAPHORE 519 /* Initialize posix semaphores */ 520 ksem_init(); 521 #endif 522 523 #if NVERIEXEC > 0 524 /* 525 * Initialise the Veriexec subsystem. 526 */ 527 veriexec_init(); 528 #endif /* NVERIEXEC > 0 */ 529 530 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 531 pax_init(); 532 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 533 534 #ifdef FAST_IPSEC 535 /* Attach network crypto subsystem */ 536 ipsec_attach(); 537 #endif 538 539 /* 540 * Initialize protocols. Block reception of incoming packets 541 * until everything is ready. 542 */ 543 s = splnet(); 544 ifinit(); 545 domaininit(); 546 if_attachdomain(); 547 splx(s); 548 549 #ifdef GPROF 550 /* Initialize kernel profiling. */ 551 kmstartup(); 552 #endif 553 554 /* Initialize system accounting. */ 555 acct_init(); 556 557 #ifndef PIPE_SOCKETPAIR 558 /* Initialize pipes. */ 559 pipe_init(); 560 #endif 561 562 #ifdef KTRACE 563 /* Initialize ktrace. */ 564 ktrinit(); 565 #endif 566 567 /* Initialize the UUID system calls. */ 568 uuid_init(); 569 570 /* 571 * Create process 1 (init(8)). We do this now, as Unix has 572 * historically had init be process 1, and changing this would 573 * probably upset a lot of people. 574 * 575 * Note that process 1 won't immediately exec init(8), but will 576 * wait for us to inform it that the root file system has been 577 * mounted. 578 */ 579 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 580 panic("fork init"); 581 582 /* 583 * Load any remaining builtin modules, and hand back temporary 584 * storage to the VM system. 585 */ 586 module_init_class(MODULE_CLASS_ANY); 587 588 /* 589 * Finalize configuration now that all real devices have been 590 * found. This needs to be done before the root device is 591 * selected, since finalization may create the root device. 592 */ 593 config_finalize(); 594 595 /* 596 * Now that autoconfiguration has completed, we can determine 597 * the root and dump devices. 598 */ 599 cpu_rootconf(); 600 cpu_dumpconf(); 601 602 /* Mount the root file system. */ 603 do { 604 domountroothook(); 605 if ((error = vfs_mountroot())) { 606 printf("cannot mount root, error = %d\n", error); 607 boothowto |= RB_ASKNAME; 608 setroot(root_device, 609 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 610 } 611 } while (error != 0); 612 mountroothook_destroy(); 613 614 /* 615 * Initialise the time-of-day clock, passing the time recorded 616 * in the root filesystem (if any) for use by systems that 617 * don't have a non-volatile time-of-day device. 618 */ 619 inittodr(rootfstime); 620 621 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 622 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 623 624 /* 625 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 626 * reference it. 627 */ 628 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 629 if (error) 630 panic("cannot find root vnode, error=%d", error); 631 cwdi0.cwdi_cdir = rootvnode; 632 VREF(cwdi0.cwdi_cdir); 633 VOP_UNLOCK(rootvnode, 0); 634 cwdi0.cwdi_rdir = NULL; 635 636 /* 637 * Now that root is mounted, we can fixup initproc's CWD 638 * info. All other processes are kthreads, which merely 639 * share proc0's CWD info. 640 */ 641 initproc->p_cwdi->cwdi_cdir = rootvnode; 642 VREF(initproc->p_cwdi->cwdi_cdir); 643 initproc->p_cwdi->cwdi_rdir = NULL; 644 645 /* 646 * Now can look at time, having had a chance to verify the time 647 * from the file system. Reset l->l_rtime as it may have been 648 * munched in mi_switch() after the time got set. 649 */ 650 getmicrotime(&time); 651 boottime = time; 652 mutex_enter(proc_lock); 653 LIST_FOREACH(p, &allproc, p_list) { 654 KASSERT((p->p_flag & PK_MARKER) == 0); 655 mutex_enter(p->p_lock); 656 p->p_stats->p_start = time; 657 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 658 lwp_lock(l); 659 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 660 lwp_unlock(l); 661 } 662 mutex_exit(p->p_lock); 663 } 664 mutex_exit(proc_lock); 665 binuptime(&curlwp->l_stime); 666 667 for (CPU_INFO_FOREACH(cii, ci)) { 668 ci->ci_schedstate.spc_lastmod = time_second; 669 } 670 671 /* Create the pageout daemon kernel thread. */ 672 uvm_swap_init(); 673 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 674 NULL, NULL, "pgdaemon")) 675 panic("fork pagedaemon"); 676 677 /* Create the filesystem syncer kernel thread. */ 678 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 679 NULL, NULL, "ioflush")) 680 panic("fork syncer"); 681 682 /* Create the aiodone daemon kernel thread. */ 683 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 684 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 685 panic("fork aiodoned"); 686 687 vmem_rehash_start(); 688 689 /* Initialize exec structures */ 690 exec_init(1); 691 692 /* 693 * Okay, now we can let init(8) exec! It's off to userland! 694 */ 695 mutex_enter(proc_lock); 696 start_init_exec = 1; 697 cv_broadcast(&lbolt); 698 mutex_exit(proc_lock); 699 700 /* The scheduler is an infinite loop. */ 701 uvm_scheduler(); 702 /* NOTREACHED */ 703 } 704 705 static void 706 check_console(struct lwp *l) 707 { 708 struct nameidata nd; 709 int error; 710 711 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 712 error = namei(&nd); 713 if (error == 0) 714 vrele(nd.ni_vp); 715 else if (error == ENOENT) 716 printf("warning: no /dev/console\n"); 717 else 718 printf("warning: lookup /dev/console: error %d\n", error); 719 } 720 721 /* 722 * List of paths to try when searching for "init". 723 */ 724 static const char * const initpaths[] = { 725 "/sbin/init", 726 "/sbin/oinit", 727 "/sbin/init.bak", 728 NULL, 729 }; 730 731 /* 732 * Start the initial user process; try exec'ing each pathname in "initpaths". 733 * The program is invoked with one argument containing the boot flags. 734 */ 735 static void 736 start_init(void *arg) 737 { 738 struct lwp *l = arg; 739 struct proc *p = l->l_proc; 740 vaddr_t addr; 741 struct sys_execve_args /* { 742 syscallarg(const char *) path; 743 syscallarg(char * const *) argp; 744 syscallarg(char * const *) envp; 745 } */ args; 746 int options, i, error; 747 register_t retval[2]; 748 char flags[4], *flagsp; 749 const char *path, *slash; 750 char *ucp, **uap, *arg0, *arg1 = NULL; 751 char ipath[129]; 752 int ipx, len; 753 754 /* 755 * Now in process 1. 756 */ 757 strncpy(p->p_comm, "init", MAXCOMLEN); 758 759 /* 760 * Wait for main() to tell us that it's safe to exec. 761 */ 762 mutex_enter(proc_lock); 763 while (start_init_exec == 0) 764 cv_wait(&lbolt, proc_lock); 765 mutex_exit(proc_lock); 766 767 /* 768 * This is not the right way to do this. We really should 769 * hand-craft a descriptor onto /dev/console to hand to init, 770 * but that's a _lot_ more work, and the benefit from this easy 771 * hack makes up for the "good is the enemy of the best" effect. 772 */ 773 check_console(l); 774 775 /* 776 * Need just enough stack to hold the faked-up "execve()" arguments. 777 */ 778 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 779 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 780 NULL, UVM_UNKNOWN_OFFSET, 0, 781 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 782 UVM_ADV_NORMAL, 783 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 784 panic("init: couldn't allocate argument space"); 785 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 786 787 ipx = 0; 788 while (1) { 789 if (boothowto & RB_ASKNAME) { 790 printf("init path"); 791 if (initpaths[ipx]) 792 printf(" (default %s)", initpaths[ipx]); 793 printf(": "); 794 len = cngetsn(ipath, sizeof(ipath)-1); 795 if (len == 0) { 796 if (initpaths[ipx]) 797 path = initpaths[ipx++]; 798 else 799 continue; 800 } else { 801 ipath[len] = '\0'; 802 path = ipath; 803 } 804 } else { 805 if ((path = initpaths[ipx++]) == NULL) 806 break; 807 } 808 809 ucp = (char *)USRSTACK; 810 811 /* 812 * Construct the boot flag argument. 813 */ 814 flagsp = flags; 815 *flagsp++ = '-'; 816 options = 0; 817 818 if (boothowto & RB_SINGLE) { 819 *flagsp++ = 's'; 820 options = 1; 821 } 822 #ifdef notyet 823 if (boothowto & RB_FASTBOOT) { 824 *flagsp++ = 'f'; 825 options = 1; 826 } 827 #endif 828 829 /* 830 * Move out the flags (arg 1), if necessary. 831 */ 832 if (options != 0) { 833 *flagsp++ = '\0'; 834 i = flagsp - flags; 835 #ifdef DEBUG 836 printf("init: copying out flags `%s' %d\n", flags, i); 837 #endif 838 arg1 = STACK_ALLOC(ucp, i); 839 ucp = STACK_MAX(arg1, i); 840 (void)copyout((void *)flags, arg1, i); 841 } 842 843 /* 844 * Move out the file name (also arg 0). 845 */ 846 i = strlen(path) + 1; 847 #ifdef DEBUG 848 printf("init: copying out path `%s' %d\n", path, i); 849 #else 850 if (boothowto & RB_ASKNAME || path != initpaths[0]) 851 printf("init: trying %s\n", path); 852 #endif 853 arg0 = STACK_ALLOC(ucp, i); 854 ucp = STACK_MAX(arg0, i); 855 (void)copyout(path, arg0, i); 856 857 /* 858 * Move out the arg pointers. 859 */ 860 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 861 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 862 SCARG(&args, path) = arg0; 863 SCARG(&args, argp) = uap; 864 SCARG(&args, envp) = NULL; 865 slash = strrchr(path, '/'); 866 if (slash) 867 (void)suword((void *)uap++, 868 (long)arg0 + (slash + 1 - path)); 869 else 870 (void)suword((void *)uap++, (long)arg0); 871 if (options != 0) 872 (void)suword((void *)uap++, (long)arg1); 873 (void)suword((void *)uap++, 0); /* terminator */ 874 875 /* 876 * Now try to exec the program. If can't for any reason 877 * other than it doesn't exist, complain. 878 */ 879 error = sys_execve(l, &args, retval); 880 if (error == 0 || error == EJUSTRETURN) { 881 KERNEL_UNLOCK_LAST(l); 882 return; 883 } 884 printf("exec %s: error %d\n", path, error); 885 } 886 printf("init: not found\n"); 887 panic("no init"); 888 } 889 890 /* 891 * calculate cache size from physmem and vm_map size. 892 */ 893 vaddr_t 894 calc_cache_size(struct vm_map *map, int pct, int va_pct) 895 { 896 paddr_t t; 897 898 /* XXX should consider competing cache if any */ 899 /* XXX should consider submaps */ 900 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 901 if (map != NULL) { 902 vsize_t vsize; 903 904 vsize = vm_map_max(map) - vm_map_min(map); 905 vsize = (uintmax_t)vsize * va_pct / 100; 906 if (t > vsize) { 907 t = vsize; 908 } 909 } 910 return t; 911 } 912
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