1 /* $NetBSD: init_main.c,v 1.360 2008/06/18 09:06:27 yamt 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 1.360 2008/06/18 09:06:27 yamt 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 /* Initialize interfaces. */ 499 ifinit1(); 500 501 /* Configure the system hardware. This will enable interrupts. */ 502 configure(); 503 504 ubc_init(); /* must be after autoconfig */ 505 506 #ifdef SYSVSHM 507 /* Initialize System V style shared memory. */ 508 shminit(); 509 #endif 510 511 #ifdef SYSVSEM 512 /* Initialize System V style semaphores. */ 513 seminit(); 514 #endif 515 516 #ifdef SYSVMSG 517 /* Initialize System V style message queues. */ 518 msginit(); 519 #endif 520 521 #ifdef P1003_1B_SEMAPHORE 522 /* Initialize posix semaphores */ 523 ksem_init(); 524 #endif 525 526 #if NVERIEXEC > 0 527 /* 528 * Initialise the Veriexec subsystem. 529 */ 530 veriexec_init(); 531 #endif /* NVERIEXEC > 0 */ 532 533 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 534 pax_init(); 535 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 536 537 #ifdef FAST_IPSEC 538 /* Attach network crypto subsystem */ 539 ipsec_attach(); 540 #endif 541 542 /* 543 * Initialize protocols. Block reception of incoming packets 544 * until everything is ready. 545 */ 546 s = splnet(); 547 ifinit(); 548 domaininit(); 549 if_attachdomain(); 550 splx(s); 551 552 #ifdef GPROF 553 /* Initialize kernel profiling. */ 554 kmstartup(); 555 #endif 556 557 /* Initialize system accounting. */ 558 acct_init(); 559 560 #ifndef PIPE_SOCKETPAIR 561 /* Initialize pipes. */ 562 pipe_init(); 563 #endif 564 565 #ifdef KTRACE 566 /* Initialize ktrace. */ 567 ktrinit(); 568 #endif 569 570 /* Initialize the UUID system calls. */ 571 uuid_init(); 572 573 /* 574 * Create process 1 (init(8)). We do this now, as Unix has 575 * historically had init be process 1, and changing this would 576 * probably upset a lot of people. 577 * 578 * Note that process 1 won't immediately exec init(8), but will 579 * wait for us to inform it that the root file system has been 580 * mounted. 581 */ 582 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 583 panic("fork init"); 584 585 /* 586 * Load any remaining builtin modules, and hand back temporary 587 * storage to the VM system. 588 */ 589 module_init_class(MODULE_CLASS_ANY); 590 591 /* 592 * Finalize configuration now that all real devices have been 593 * found. This needs to be done before the root device is 594 * selected, since finalization may create the root device. 595 */ 596 config_finalize(); 597 598 /* 599 * Now that autoconfiguration has completed, we can determine 600 * the root and dump devices. 601 */ 602 cpu_rootconf(); 603 cpu_dumpconf(); 604 605 /* Mount the root file system. */ 606 do { 607 domountroothook(); 608 if ((error = vfs_mountroot())) { 609 printf("cannot mount root, error = %d\n", error); 610 boothowto |= RB_ASKNAME; 611 setroot(root_device, 612 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 613 } 614 } while (error != 0); 615 mountroothook_destroy(); 616 617 /* 618 * Initialise the time-of-day clock, passing the time recorded 619 * in the root filesystem (if any) for use by systems that 620 * don't have a non-volatile time-of-day device. 621 */ 622 inittodr(rootfstime); 623 624 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 625 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 626 627 /* 628 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 629 * reference it. 630 */ 631 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 632 if (error) 633 panic("cannot find root vnode, error=%d", error); 634 cwdi0.cwdi_cdir = rootvnode; 635 VREF(cwdi0.cwdi_cdir); 636 VOP_UNLOCK(rootvnode, 0); 637 cwdi0.cwdi_rdir = NULL; 638 639 /* 640 * Now that root is mounted, we can fixup initproc's CWD 641 * info. All other processes are kthreads, which merely 642 * share proc0's CWD info. 643 */ 644 initproc->p_cwdi->cwdi_cdir = rootvnode; 645 VREF(initproc->p_cwdi->cwdi_cdir); 646 initproc->p_cwdi->cwdi_rdir = NULL; 647 648 /* 649 * Now can look at time, having had a chance to verify the time 650 * from the file system. Reset l->l_rtime as it may have been 651 * munched in mi_switch() after the time got set. 652 */ 653 getmicrotime(&time); 654 boottime = time; 655 mutex_enter(proc_lock); 656 LIST_FOREACH(p, &allproc, p_list) { 657 KASSERT((p->p_flag & PK_MARKER) == 0); 658 mutex_enter(p->p_lock); 659 p->p_stats->p_start = time; 660 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 661 lwp_lock(l); 662 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 663 lwp_unlock(l); 664 } 665 mutex_exit(p->p_lock); 666 } 667 mutex_exit(proc_lock); 668 binuptime(&curlwp->l_stime); 669 670 for (CPU_INFO_FOREACH(cii, ci)) { 671 ci->ci_schedstate.spc_lastmod = time_second; 672 } 673 674 /* Create the pageout daemon kernel thread. */ 675 uvm_swap_init(); 676 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 677 NULL, NULL, "pgdaemon")) 678 panic("fork pagedaemon"); 679 680 /* Create the filesystem syncer kernel thread. */ 681 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 682 NULL, NULL, "ioflush")) 683 panic("fork syncer"); 684 685 /* Create the aiodone daemon kernel thread. */ 686 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 687 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 688 panic("fork aiodoned"); 689 690 vmem_rehash_start(); 691 692 /* Initialize exec structures */ 693 exec_init(1); 694 695 /* 696 * Okay, now we can let init(8) exec! It's off to userland! 697 */ 698 mutex_enter(proc_lock); 699 start_init_exec = 1; 700 cv_broadcast(&lbolt); 701 mutex_exit(proc_lock); 702 703 /* The scheduler is an infinite loop. */ 704 uvm_scheduler(); 705 /* NOTREACHED */ 706 } 707 708 static void 709 check_console(struct lwp *l) 710 { 711 struct nameidata nd; 712 int error; 713 714 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 715 error = namei(&nd); 716 if (error == 0) 717 vrele(nd.ni_vp); 718 else if (error == ENOENT) 719 printf("warning: no /dev/console\n"); 720 else 721 printf("warning: lookup /dev/console: error %d\n", error); 722 } 723 724 /* 725 * List of paths to try when searching for "init". 726 */ 727 static const char * const initpaths[] = { 728 "/sbin/init", 729 "/sbin/oinit", 730 "/sbin/init.bak", 731 NULL, 732 }; 733 734 /* 735 * Start the initial user process; try exec'ing each pathname in "initpaths". 736 * The program is invoked with one argument containing the boot flags. 737 */ 738 static void 739 start_init(void *arg) 740 { 741 struct lwp *l = arg; 742 struct proc *p = l->l_proc; 743 vaddr_t addr; 744 struct sys_execve_args /* { 745 syscallarg(const char *) path; 746 syscallarg(char * const *) argp; 747 syscallarg(char * const *) envp; 748 } */ args; 749 int options, i, error; 750 register_t retval[2]; 751 char flags[4], *flagsp; 752 const char *path, *slash; 753 char *ucp, **uap, *arg0, *arg1 = NULL; 754 char ipath[129]; 755 int ipx, len; 756 757 /* 758 * Now in process 1. 759 */ 760 strncpy(p->p_comm, "init", MAXCOMLEN); 761 762 /* 763 * Wait for main() to tell us that it's safe to exec. 764 */ 765 mutex_enter(proc_lock); 766 while (start_init_exec == 0) 767 cv_wait(&lbolt, proc_lock); 768 mutex_exit(proc_lock); 769 770 /* 771 * This is not the right way to do this. We really should 772 * hand-craft a descriptor onto /dev/console to hand to init, 773 * but that's a _lot_ more work, and the benefit from this easy 774 * hack makes up for the "good is the enemy of the best" effect. 775 */ 776 check_console(l); 777 778 /* 779 * Need just enough stack to hold the faked-up "execve()" arguments. 780 */ 781 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 782 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 783 NULL, UVM_UNKNOWN_OFFSET, 0, 784 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 785 UVM_ADV_NORMAL, 786 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 787 panic("init: couldn't allocate argument space"); 788 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 789 790 ipx = 0; 791 while (1) { 792 if (boothowto & RB_ASKNAME) { 793 printf("init path"); 794 if (initpaths[ipx]) 795 printf(" (default %s)", initpaths[ipx]); 796 printf(": "); 797 len = cngetsn(ipath, sizeof(ipath)-1); 798 if (len == 0) { 799 if (initpaths[ipx]) 800 path = initpaths[ipx++]; 801 else 802 continue; 803 } else { 804 ipath[len] = '\0'; 805 path = ipath; 806 } 807 } else { 808 if ((path = initpaths[ipx++]) == NULL) 809 break; 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