init_main.c revision 1.363
1 /* $NetBSD: init_main.c,v 1.363 2008/08/30 09:20:13 reinoud 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 1.363 2008/08/30 09:20:13 reinoud 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 #include "opt_wapbl.h" 112 113 #include "rnd.h" 114 #include "sysmon_envsys.h" 115 #include "sysmon_power.h" 116 #include "sysmon_taskq.h" 117 #include "sysmon_wdog.h" 118 #include "veriexec.h" 119 120 #include <sys/param.h> 121 #include <sys/acct.h> 122 #include <sys/filedesc.h> 123 #include <sys/file.h> 124 #include <sys/errno.h> 125 #include <sys/callout.h> 126 #include <sys/cpu.h> 127 #include <sys/kernel.h> 128 #include <sys/kmem.h> 129 #include <sys/mount.h> 130 #include <sys/proc.h> 131 #include <sys/kthread.h> 132 #include <sys/resourcevar.h> 133 #include <sys/signalvar.h> 134 #include <sys/systm.h> 135 #include <sys/vnode.h> 136 #include <sys/fstrans.h> 137 #include <sys/tty.h> 138 #include <sys/conf.h> 139 #include <sys/disklabel.h> 140 #include <sys/buf.h> 141 #include <sys/device.h> 142 #include <sys/exec.h> 143 #include <sys/socketvar.h> 144 #include <sys/protosw.h> 145 #include <sys/percpu.h> 146 #include <sys/pset.h> 147 #include <sys/sysctl.h> 148 #include <sys/reboot.h> 149 #include <sys/user.h> 150 #include <sys/sysctl.h> 151 #include <sys/event.h> 152 #include <sys/mbuf.h> 153 #include <sys/sched.h> 154 #include <sys/sleepq.h> 155 #include <sys/iostat.h> 156 #include <sys/vmem.h> 157 #include <sys/uuid.h> 158 #include <sys/extent.h> 159 #include <sys/disk.h> 160 #include <sys/mqueue.h> 161 #include <sys/msgbuf.h> 162 #include <sys/module.h> 163 #include <sys/event.h> 164 #include <sys/lockf.h> 165 #ifdef FAST_IPSEC 166 #include <netipsec/ipsec.h> 167 #endif 168 #ifdef SYSVSHM 169 #include <sys/shm.h> 170 #endif 171 #ifdef SYSVSEM 172 #include <sys/sem.h> 173 #endif 174 #ifdef SYSVMSG 175 #include <sys/msg.h> 176 #endif 177 #ifdef P1003_1B_SEMAPHORE 178 #include <sys/ksem.h> 179 #endif 180 #include <sys/domain.h> 181 #include <sys/namei.h> 182 #if NRND > 0 183 #include <sys/rnd.h> 184 #endif 185 #include <sys/pipe.h> 186 #ifdef LKM 187 #include <sys/lkm.h> 188 #endif 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 extern struct proc proc0; 233 extern struct lwp lwp0; 234 extern struct cwdinfo cwdi0; 235 extern time_t rootfstime; 236 237 #ifndef curlwp 238 struct lwp *curlwp = &lwp0; 239 #endif 240 struct proc *initproc; 241 242 struct vnode *rootvp, *swapdev_vp; 243 int boothowto; 244 int cold = 1; /* still working on startup */ 245 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 246 247 int start_init_exec; /* semaphore for start_init() */ 248 249 static void check_console(struct lwp *l); 250 static void start_init(void *); 251 void main(void); 252 void ssp_init(void); 253 254 #if defined(__SSP__) || defined(__SSP_ALL__) 255 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 256 void __stack_chk_fail(void); 257 258 void 259 __stack_chk_fail(void) 260 { 261 panic("stack overflow detected; terminated"); 262 } 263 264 void 265 ssp_init(void) 266 { 267 int s; 268 269 #ifdef DIAGNOSTIC 270 printf("Initializing SSP:"); 271 #endif 272 /* 273 * We initialize ssp here carefully: 274 * 1. after we got some entropy 275 * 2. without calling a function 276 */ 277 size_t i; 278 long guard[__arraycount(__stack_chk_guard)]; 279 280 arc4randbytes(guard, sizeof(guard)); 281 s = splhigh(); 282 for (i = 0; i < __arraycount(guard); i++) 283 __stack_chk_guard[i] = guard[i]; 284 splx(s); 285 #ifdef DIAGNOSTIC 286 for (i = 0; i < __arraycount(guard); i++) 287 printf("%lx ", guard[i]); 288 printf("\n"); 289 #endif 290 } 291 #else 292 void 293 ssp_init(void) 294 { 295 296 } 297 #endif 298 299 void __secmodel_none(void); 300 __weak_alias(secmodel_start,__secmodel_none); 301 void 302 __secmodel_none(void) 303 { 304 return; 305 } 306 307 /* 308 * System startup; initialize the world, create process 0, mount root 309 * filesystem, and fork to create init and pagedaemon. Most of the 310 * hard work is done in the lower-level initialization routines including 311 * startup(), which does memory initialization and autoconfiguration. 312 */ 313 void 314 main(void) 315 { 316 struct timeval time; 317 struct lwp *l; 318 struct proc *p; 319 int s, error; 320 #ifdef NVNODE_IMPLICIT 321 int usevnodes; 322 #endif 323 CPU_INFO_ITERATOR cii; 324 struct cpu_info *ci; 325 326 l = &lwp0; 327 #ifndef LWP0_CPU_INFO 328 l->l_cpu = curcpu(); 329 #endif 330 331 /* 332 * Attempt to find console and initialize 333 * in case of early panic or other messages. 334 */ 335 consinit(); 336 337 kernel_lock_init(); 338 339 uvm_init(); 340 341 kmem_init(); 342 343 percpu_init(); 344 345 /* Initialize lock caches. */ 346 mutex_obj_init(); 347 348 /* Initialize the extent manager. */ 349 extent_init(); 350 351 /* Do machine-dependent initialization. */ 352 cpu_startup(); 353 354 /* Initialize callouts, part 1. */ 355 callout_startup(); 356 357 /* 358 * Initialize the kernel authorization subsystem and start the 359 * default security model, if any. We need to do this early 360 * enough so that subsystems relying on any of the aforementioned 361 * can work properly. Since the security model may dictate the 362 * credential inheritance policy, it is needed at least before 363 * any process is created, specifically proc0. 364 */ 365 kauth_init(); 366 secmodel_start(); 367 368 /* Initialize the buffer cache */ 369 bufinit(); 370 371 /* Initialize sockets. */ 372 soinit(); 373 374 /* 375 * The following things must be done before autoconfiguration. 376 */ 377 evcnt_init(); /* initialize event counters */ 378 #if NRND > 0 379 rnd_init(); /* initialize random number generator */ 380 #endif 381 382 /* Initialize process and pgrp structures. */ 383 procinit(); 384 lwpinit(); 385 386 /* Initialize signal-related data structures. */ 387 signal_init(); 388 389 /* Initialize resource management. */ 390 resource_init(); 391 392 /* Create process 0 (the swapper). */ 393 proc0_init(); 394 395 /* Initialize the UID hash table. */ 396 uid_init(); 397 398 /* Charge root for one process. */ 399 (void)chgproccnt(0, 1); 400 401 /* Initialize timekeeping. */ 402 time_init(); 403 404 /* Initialize the run queues, turnstiles and sleep queues. */ 405 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 406 sched_rqinit(); 407 turnstile_init(); 408 sleeptab_init(&sleeptab); 409 410 /* Initialize processor-sets */ 411 psets_init(); 412 413 /* MI initialization of the boot cpu */ 414 error = mi_cpu_attach(curcpu()); 415 KASSERT(error == 0); 416 417 /* Initialize timekeeping, part 2. */ 418 time_init2(); 419 420 /* 421 * Initialize mbuf's. Do this now because we might attempt to 422 * allocate mbufs or mbuf clusters during autoconfiguration. 423 */ 424 mbinit(); 425 426 /* Initialize the sysctl subsystem. */ 427 sysctl_init(); 428 429 /* Initialize I/O statistics. */ 430 iostat_init(); 431 432 /* Initialize the log device. */ 433 loginit(); 434 435 /* Start module system. */ 436 module_init(); 437 438 /* Initialize the file systems. */ 439 #ifdef NVNODE_IMPLICIT 440 /* 441 * If maximum number of vnodes in namei vnode cache is not explicitly 442 * defined in kernel config, adjust the number such as we use roughly 443 * 10% of memory for vnodes and associated data structures in the 444 * assumed worst case. Do not provide fewer than NVNODE vnodes. 445 */ 446 usevnodes = 447 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 448 if (usevnodes > desiredvnodes) 449 desiredvnodes = usevnodes; 450 #endif 451 vfsinit(); 452 lf_init(); 453 454 /* Initialize fstrans. */ 455 fstrans_init(); 456 457 /* Initialize the file descriptor system. */ 458 fd_sys_init(); 459 460 /* Initialize kqueue. */ 461 kqueue_init(); 462 463 /* Initialize asynchronous I/O. */ 464 aio_sysinit(); 465 466 /* Initialize message queues. */ 467 mqueue_sysinit(); 468 469 /* Initialize the system monitor subsystems. */ 470 #if NSYSMON_TASKQ > 0 471 sysmon_task_queue_preinit(); 472 #endif 473 474 #if NSYSMON_ENVSYS > 0 475 sysmon_envsys_init(); 476 #endif 477 478 #if NSYSMON_POWER > 0 479 sysmon_power_init(); 480 #endif 481 482 #if NSYSMON_WDOG > 0 483 sysmon_wdog_init(); 484 #endif 485 486 inittimecounter(); 487 ntp_init(); 488 489 /* Initialize the device switch tables. */ 490 devsw_init(); 491 492 /* Initialize tty subsystem. */ 493 tty_init(); 494 ttyldisc_init(); 495 496 /* Initialize the buffer cache, part 2. */ 497 bufinit2(); 498 499 /* Initialize the disk wedge subsystem. */ 500 dkwedge_init(); 501 502 /* Initialize interfaces. */ 503 ifinit1(); 504 505 /* Configure the system hardware. This will enable interrupts. */ 506 configure(); 507 508 ubc_init(); /* must be after autoconfig */ 509 510 #ifdef SYSVSHM 511 /* Initialize System V style shared memory. */ 512 shminit(); 513 #endif 514 515 #ifdef SYSVSEM 516 /* Initialize System V style semaphores. */ 517 seminit(); 518 #endif 519 520 #ifdef SYSVMSG 521 /* Initialize System V style message queues. */ 522 msginit(); 523 #endif 524 525 #ifdef P1003_1B_SEMAPHORE 526 /* Initialize posix semaphores */ 527 ksem_init(); 528 #endif 529 530 #if NVERIEXEC > 0 531 /* 532 * Initialise the Veriexec subsystem. 533 */ 534 veriexec_init(); 535 #endif /* NVERIEXEC > 0 */ 536 537 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 538 pax_init(); 539 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 540 541 #ifdef FAST_IPSEC 542 /* Attach network crypto subsystem */ 543 ipsec_attach(); 544 #endif 545 546 /* 547 * Initialize protocols. Block reception of incoming packets 548 * until everything is ready. 549 */ 550 s = splnet(); 551 ifinit(); 552 domaininit(); 553 if_attachdomain(); 554 splx(s); 555 556 #ifdef GPROF 557 /* Initialize kernel profiling. */ 558 kmstartup(); 559 #endif 560 561 /* Initialize system accounting. */ 562 acct_init(); 563 564 #ifndef PIPE_SOCKETPAIR 565 /* Initialize pipes. */ 566 pipe_init(); 567 #endif 568 569 #ifdef KTRACE 570 /* Initialize ktrace. */ 571 ktrinit(); 572 #endif 573 574 /* Initialize the UUID system calls. */ 575 uuid_init(); 576 577 #ifdef WAPBL 578 /* Initialize write-ahead physical block logging. */ 579 wapbl_init(); 580 #endif 581 582 /* 583 * Create process 1 (init(8)). We do this now, as Unix has 584 * historically had init be process 1, and changing this would 585 * probably upset a lot of people. 586 * 587 * Note that process 1 won't immediately exec init(8), but will 588 * wait for us to inform it that the root file system has been 589 * mounted. 590 */ 591 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 592 panic("fork init"); 593 594 /* 595 * Load any remaining builtin modules, and hand back temporary 596 * storage to the VM system. 597 */ 598 module_init_class(MODULE_CLASS_ANY); 599 600 /* 601 * Finalize configuration now that all real devices have been 602 * found. This needs to be done before the root device is 603 * selected, since finalization may create the root device. 604 */ 605 config_finalize(); 606 607 /* 608 * Now that autoconfiguration has completed, we can determine 609 * the root and dump devices. 610 */ 611 cpu_rootconf(); 612 cpu_dumpconf(); 613 614 /* Mount the root file system. */ 615 do { 616 domountroothook(); 617 if ((error = vfs_mountroot())) { 618 printf("cannot mount root, error = %d\n", error); 619 boothowto |= RB_ASKNAME; 620 setroot(root_device, 621 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 622 } 623 } while (error != 0); 624 mountroothook_destroy(); 625 626 /* 627 * Initialise the time-of-day clock, passing the time recorded 628 * in the root filesystem (if any) for use by systems that 629 * don't have a non-volatile time-of-day device. 630 */ 631 inittodr(rootfstime); 632 633 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 634 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 635 636 /* 637 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 638 * reference it. 639 */ 640 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 641 if (error) 642 panic("cannot find root vnode, error=%d", error); 643 cwdi0.cwdi_cdir = rootvnode; 644 VREF(cwdi0.cwdi_cdir); 645 VOP_UNLOCK(rootvnode, 0); 646 cwdi0.cwdi_rdir = NULL; 647 648 /* 649 * Now that root is mounted, we can fixup initproc's CWD 650 * info. All other processes are kthreads, which merely 651 * share proc0's CWD info. 652 */ 653 initproc->p_cwdi->cwdi_cdir = rootvnode; 654 VREF(initproc->p_cwdi->cwdi_cdir); 655 initproc->p_cwdi->cwdi_rdir = NULL; 656 657 /* 658 * Now can look at time, having had a chance to verify the time 659 * from the file system. Reset l->l_rtime as it may have been 660 * munched in mi_switch() after the time got set. 661 */ 662 getmicrotime(&time); 663 boottime = time; 664 mutex_enter(proc_lock); 665 LIST_FOREACH(p, &allproc, p_list) { 666 KASSERT((p->p_flag & PK_MARKER) == 0); 667 mutex_enter(p->p_lock); 668 p->p_stats->p_start = time; 669 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 670 lwp_lock(l); 671 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 672 lwp_unlock(l); 673 } 674 mutex_exit(p->p_lock); 675 } 676 mutex_exit(proc_lock); 677 binuptime(&curlwp->l_stime); 678 679 for (CPU_INFO_FOREACH(cii, ci)) { 680 ci->ci_schedstate.spc_lastmod = time_second; 681 } 682 683 /* Create the pageout daemon kernel thread. */ 684 uvm_swap_init(); 685 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 686 NULL, NULL, "pgdaemon")) 687 panic("fork pagedaemon"); 688 689 /* Create the filesystem syncer kernel thread. */ 690 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 691 NULL, NULL, "ioflush")) 692 panic("fork syncer"); 693 694 /* Create the aiodone daemon kernel thread. */ 695 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 696 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 697 panic("fork aiodoned"); 698 699 vmem_rehash_start(); 700 701 /* Initialize exec structures */ 702 exec_init(1); 703 704 /* 705 * Okay, now we can let init(8) exec! It's off to userland! 706 */ 707 mutex_enter(proc_lock); 708 start_init_exec = 1; 709 cv_broadcast(&lbolt); 710 mutex_exit(proc_lock); 711 712 /* The scheduler is an infinite loop. */ 713 uvm_scheduler(); 714 /* NOTREACHED */ 715 } 716 717 static void 718 check_console(struct lwp *l) 719 { 720 struct nameidata nd; 721 int error; 722 723 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 724 error = namei(&nd); 725 if (error == 0) 726 vrele(nd.ni_vp); 727 else if (error == ENOENT) 728 printf("warning: no /dev/console\n"); 729 else 730 printf("warning: lookup /dev/console: error %d\n", error); 731 } 732 733 /* 734 * List of paths to try when searching for "init". 735 */ 736 static const char * const initpaths[] = { 737 "/sbin/init", 738 "/sbin/oinit", 739 "/sbin/init.bak", 740 NULL, 741 }; 742 743 /* 744 * Start the initial user process; try exec'ing each pathname in "initpaths". 745 * The program is invoked with one argument containing the boot flags. 746 */ 747 static void 748 start_init(void *arg) 749 { 750 struct lwp *l = arg; 751 struct proc *p = l->l_proc; 752 vaddr_t addr; 753 struct sys_execve_args /* { 754 syscallarg(const char *) path; 755 syscallarg(char * const *) argp; 756 syscallarg(char * const *) envp; 757 } */ args; 758 int options, i, error; 759 register_t retval[2]; 760 char flags[4], *flagsp; 761 const char *path, *slash; 762 char *ucp, **uap, *arg0, *arg1 = NULL; 763 char ipath[129]; 764 int ipx, len; 765 766 /* 767 * Now in process 1. 768 */ 769 strncpy(p->p_comm, "init", MAXCOMLEN); 770 771 /* 772 * Wait for main() to tell us that it's safe to exec. 773 */ 774 mutex_enter(proc_lock); 775 while (start_init_exec == 0) 776 cv_wait(&lbolt, proc_lock); 777 mutex_exit(proc_lock); 778 779 /* 780 * This is not the right way to do this. We really should 781 * hand-craft a descriptor onto /dev/console to hand to init, 782 * but that's a _lot_ more work, and the benefit from this easy 783 * hack makes up for the "good is the enemy of the best" effect. 784 */ 785 check_console(l); 786 787 /* 788 * Need just enough stack to hold the faked-up "execve()" arguments. 789 */ 790 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 791 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 792 NULL, UVM_UNKNOWN_OFFSET, 0, 793 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 794 UVM_ADV_NORMAL, 795 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 796 panic("init: couldn't allocate argument space"); 797 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 798 799 ipx = 0; 800 while (1) { 801 if (boothowto & RB_ASKNAME) { 802 printf("init path"); 803 if (initpaths[ipx]) 804 printf(" (default %s)", initpaths[ipx]); 805 printf(": "); 806 len = cngetsn(ipath, sizeof(ipath)-1); 807 if (len == 0) { 808 if (initpaths[ipx]) 809 path = initpaths[ipx++]; 810 else 811 continue; 812 } else { 813 ipath[len] = '\0'; 814 path = ipath; 815 } 816 } else { 817 if ((path = initpaths[ipx++]) == NULL) 818 break; 819 } 820 821 ucp = (char *)USRSTACK; 822 823 /* 824 * Construct the boot flag argument. 825 */ 826 flagsp = flags; 827 *flagsp++ = '-'; 828 options = 0; 829 830 if (boothowto & RB_SINGLE) { 831 *flagsp++ = 's'; 832 options = 1; 833 } 834 #ifdef notyet 835 if (boothowto & RB_FASTBOOT) { 836 *flagsp++ = 'f'; 837 options = 1; 838 } 839 #endif 840 841 /* 842 * Move out the flags (arg 1), if necessary. 843 */ 844 if (options != 0) { 845 *flagsp++ = '\0'; 846 i = flagsp - flags; 847 #ifdef DEBUG 848 printf("init: copying out flags `%s' %d\n", flags, i); 849 #endif 850 arg1 = STACK_ALLOC(ucp, i); 851 ucp = STACK_MAX(arg1, i); 852 (void)copyout((void *)flags, arg1, i); 853 } 854 855 /* 856 * Move out the file name (also arg 0). 857 */ 858 i = strlen(path) + 1; 859 #ifdef DEBUG 860 printf("init: copying out path `%s' %d\n", path, i); 861 #else 862 if (boothowto & RB_ASKNAME || path != initpaths[0]) 863 printf("init: trying %s\n", path); 864 #endif 865 arg0 = STACK_ALLOC(ucp, i); 866 ucp = STACK_MAX(arg0, i); 867 (void)copyout(path, arg0, i); 868 869 /* 870 * Move out the arg pointers. 871 */ 872 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 873 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 874 SCARG(&args, path) = arg0; 875 SCARG(&args, argp) = uap; 876 SCARG(&args, envp) = NULL; 877 slash = strrchr(path, '/'); 878 if (slash) 879 (void)suword((void *)uap++, 880 (long)arg0 + (slash + 1 - path)); 881 else 882 (void)suword((void *)uap++, (long)arg0); 883 if (options != 0) 884 (void)suword((void *)uap++, (long)arg1); 885 (void)suword((void *)uap++, 0); /* terminator */ 886 887 /* 888 * Now try to exec the program. If can't for any reason 889 * other than it doesn't exist, complain. 890 */ 891 error = sys_execve(l, &args, retval); 892 if (error == 0 || error == EJUSTRETURN) { 893 KERNEL_UNLOCK_LAST(l); 894 return; 895 } 896 printf("exec %s: error %d\n", path, error); 897 } 898 printf("init: not found\n"); 899 panic("no init"); 900 } 901 902 /* 903 * calculate cache size from physmem and vm_map size. 904 */ 905 vaddr_t 906 calc_cache_size(struct vm_map *map, int pct, int va_pct) 907 { 908 paddr_t t; 909 910 /* XXX should consider competing cache if any */ 911 /* XXX should consider submaps */ 912 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 913 if (map != NULL) { 914 vsize_t vsize; 915 916 vsize = vm_map_max(map) - vm_map_min(map); 917 vsize = (uintmax_t)vsize * va_pct / 100; 918 if (t > vsize) { 919 t = vsize; 920 } 921 } 922 return t; 923 } 924
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