init_main.c revision 1.378
1 /* $NetBSD: init_main.c,v 1.378 2008/12/07 20:58:46 pooka 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 1.378 2008/12/07 20:58:46 pooka Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_ipsec.h" 104 #include "opt_ntp.h" 105 #include "opt_pipe.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 "ksyms.h" 114 #include "rnd.h" 115 #include "sysmon_envsys.h" 116 #include "sysmon_power.h" 117 #include "sysmon_taskq.h" 118 #include "sysmon_wdog.h" 119 #include "veriexec.h" 120 121 #include <sys/param.h> 122 #include <sys/acct.h> 123 #include <sys/filedesc.h> 124 #include <sys/file.h> 125 #include <sys/errno.h> 126 #include <sys/callout.h> 127 #include <sys/cpu.h> 128 #include <sys/kernel.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 #include <sys/once.h> 166 #include <sys/ksyms.h> 167 #include <sys/uidinfo.h> 168 #ifdef FAST_IPSEC 169 #include <netipsec/ipsec.h> 170 #endif 171 #ifdef SYSVSHM 172 #include <sys/shm.h> 173 #endif 174 #ifdef SYSVSEM 175 #include <sys/sem.h> 176 #endif 177 #ifdef SYSVMSG 178 #include <sys/msg.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 #if NVERIEXEC > 0 187 #include <sys/verified_exec.h> 188 #endif /* NVERIEXEC > 0 */ 189 #ifdef KTRACE 190 #include <sys/ktrace.h> 191 #endif 192 #include <sys/kauth.h> 193 #ifdef WAPBL 194 #include <sys/wapbl.h> 195 #endif 196 #include <net80211/ieee80211_netbsd.h> 197 198 #include <sys/syscall.h> 199 #include <sys/syscallargs.h> 200 201 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 202 #include <sys/pax.h> 203 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 204 205 #include <ufs/ufs/quota.h> 206 207 #include <miscfs/genfs/genfs.h> 208 #include <miscfs/syncfs/syncfs.h> 209 210 #include <sys/cpu.h> 211 212 #include <uvm/uvm.h> 213 214 #if NSYSMON_TASKQ > 0 215 #include <dev/sysmon/sysmon_taskq.h> 216 #endif 217 218 #include <dev/cons.h> 219 220 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 221 #include <dev/sysmon/sysmonvar.h> 222 #endif 223 224 #include <net/if.h> 225 #include <net/raw_cb.h> 226 227 #include <secmodel/secmodel.h> 228 229 extern struct proc proc0; 230 extern struct lwp lwp0; 231 extern struct cwdinfo cwdi0; 232 extern time_t rootfstime; 233 234 #ifndef curlwp 235 struct lwp *curlwp = &lwp0; 236 #endif 237 struct proc *initproc; 238 239 struct vnode *rootvp, *swapdev_vp; 240 int boothowto; 241 int cold = 1; /* still working on startup */ 242 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 243 244 int start_init_exec; /* semaphore for start_init() */ 245 246 static void check_console(struct lwp *l); 247 static void start_init(void *); 248 void main(void); 249 void ssp_init(void); 250 251 #if defined(__SSP__) || defined(__SSP_ALL__) 252 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 253 void __stack_chk_fail(void); 254 255 void 256 __stack_chk_fail(void) 257 { 258 panic("stack overflow detected; terminated"); 259 } 260 261 void 262 ssp_init(void) 263 { 264 int s; 265 266 #ifdef DIAGNOSTIC 267 printf("Initializing SSP:"); 268 #endif 269 /* 270 * We initialize ssp here carefully: 271 * 1. after we got some entropy 272 * 2. without calling a function 273 */ 274 size_t i; 275 long guard[__arraycount(__stack_chk_guard)]; 276 277 arc4randbytes(guard, sizeof(guard)); 278 s = splhigh(); 279 for (i = 0; i < __arraycount(guard); i++) 280 __stack_chk_guard[i] = guard[i]; 281 splx(s); 282 #ifdef DIAGNOSTIC 283 for (i = 0; i < __arraycount(guard); i++) 284 printf("%lx ", guard[i]); 285 printf("\n"); 286 #endif 287 } 288 #else 289 void 290 ssp_init(void) 291 { 292 293 } 294 #endif 295 296 void __secmodel_none(void); 297 __weak_alias(secmodel_start,__secmodel_none); 298 void 299 __secmodel_none(void) 300 { 301 return; 302 } 303 304 /* 305 * System startup; initialize the world, create process 0, mount root 306 * filesystem, and fork to create init and pagedaemon. Most of the 307 * hard work is done in the lower-level initialization routines including 308 * startup(), which does memory initialization and autoconfiguration. 309 */ 310 void 311 main(void) 312 { 313 struct timeval time; 314 struct lwp *l; 315 struct proc *p; 316 int s, error; 317 #ifdef NVNODE_IMPLICIT 318 int usevnodes; 319 #endif 320 CPU_INFO_ITERATOR cii; 321 struct cpu_info *ci; 322 323 l = &lwp0; 324 #ifndef LWP0_CPU_INFO 325 l->l_cpu = curcpu(); 326 #endif 327 328 /* 329 * Attempt to find console and initialize 330 * in case of early panic or other messages. 331 */ 332 consinit(); 333 334 kernel_lock_init(); 335 once_init(); 336 337 uvm_init(); 338 339 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 340 ksyms_init(); 341 #endif 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 the sysctl subsystem. */ 355 sysctl_init(); 356 357 /* Initialize callouts, part 1. */ 358 callout_startup(); 359 360 /* 361 * Initialize the kernel authorization subsystem and start the 362 * default security model, if any. We need to do this early 363 * enough so that subsystems relying on any of the aforementioned 364 * can work properly. Since the security model may dictate the 365 * credential inheritance policy, it is needed at least before 366 * any process is created, specifically proc0. 367 */ 368 kauth_init(); 369 secmodel_start(); 370 371 /* Initialize the buffer cache */ 372 bufinit(); 373 374 /* Initialize sockets. */ 375 soinit(); 376 377 /* 378 * The following things must be done before autoconfiguration. 379 */ 380 evcnt_init(); /* initialize event counters */ 381 #if NRND > 0 382 rnd_init(); /* initialize random number generator */ 383 #endif 384 385 /* Initialize process and pgrp structures. */ 386 procinit(); 387 lwpinit(); 388 389 /* Initialize signal-related data structures. */ 390 signal_init(); 391 392 /* Initialize resource management. */ 393 resource_init(); 394 395 /* Create process 0 (the swapper). */ 396 proc0_init(); 397 398 /* Initialize the UID hash table. */ 399 uid_init(); 400 401 /* Charge root for one process. */ 402 (void)chgproccnt(0, 1); 403 404 /* Initialize timekeeping. */ 405 time_init(); 406 407 /* Initialize the run queues, turnstiles and sleep queues. */ 408 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 409 sched_rqinit(); 410 turnstile_init(); 411 sleeptab_init(&sleeptab); 412 413 /* Initialize processor-sets */ 414 psets_init(); 415 416 /* MI initialization of the boot cpu */ 417 error = mi_cpu_attach(curcpu()); 418 KASSERT(error == 0); 419 420 /* Initialize timekeeping, part 2. */ 421 time_init2(); 422 423 /* 424 * Initialize mbuf's. Do this now because we might attempt to 425 * allocate mbufs or mbuf clusters during autoconfiguration. 426 */ 427 mbinit(); 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 cwd structures */ 461 cwd_sys_init(); 462 463 /* Initialize kqueue. */ 464 kqueue_init(); 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 #if NVERIEXEC > 0 526 /* 527 * Initialise the Veriexec subsystem. 528 */ 529 veriexec_init(); 530 #endif /* NVERIEXEC > 0 */ 531 532 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 533 pax_init(); 534 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 535 536 #ifdef FAST_IPSEC 537 /* Attach network crypto subsystem */ 538 ipsec_attach(); 539 #endif 540 541 /* 542 * Initialize protocols. Block reception of incoming packets 543 * until everything is ready. 544 */ 545 s = splnet(); 546 ifinit(); 547 domaininit(); 548 if_attachdomain(); 549 splx(s); 550 551 #ifdef GPROF 552 /* Initialize kernel profiling. */ 553 kmstartup(); 554 #endif 555 556 /* Initialize system accounting. */ 557 acct_init(); 558 559 #ifndef PIPE_SOCKETPAIR 560 /* Initialize pipes. */ 561 pipe_init(); 562 #endif 563 564 #ifdef KTRACE 565 /* Initialize ktrace. */ 566 ktrinit(); 567 #endif 568 569 /* Initialize the UUID system calls. */ 570 uuid_init(); 571 572 #ifdef WAPBL 573 /* Initialize write-ahead physical block logging. */ 574 wapbl_init(); 575 #endif 576 577 /* 578 * Create process 1 (init(8)). We do this now, as Unix has 579 * historically had init be process 1, and changing this would 580 * probably upset a lot of people. 581 * 582 * Note that process 1 won't immediately exec init(8), but will 583 * wait for us to inform it that the root file system has been 584 * mounted. 585 */ 586 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 587 panic("fork init"); 588 589 /* 590 * Load any remaining builtin modules, and hand back temporary 591 * storage to the VM system. 592 */ 593 module_init_class(MODULE_CLASS_ANY); 594 595 /* 596 * Finalize configuration now that all real devices have been 597 * found. This needs to be done before the root device is 598 * selected, since finalization may create the root device. 599 */ 600 config_finalize(); 601 602 /* 603 * Now that autoconfiguration has completed, we can determine 604 * the root and dump devices. 605 */ 606 cpu_rootconf(); 607 cpu_dumpconf(); 608 609 /* Mount the root file system. */ 610 do { 611 domountroothook(); 612 if ((error = vfs_mountroot())) { 613 printf("cannot mount root, error = %d\n", error); 614 boothowto |= RB_ASKNAME; 615 setroot(root_device, 616 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 617 } 618 } while (error != 0); 619 mountroothook_destroy(); 620 621 /* 622 * Initialise the time-of-day clock, passing the time recorded 623 * in the root filesystem (if any) for use by systems that 624 * don't have a non-volatile time-of-day device. 625 */ 626 inittodr(rootfstime); 627 628 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 629 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 630 631 /* 632 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 633 * reference it. 634 */ 635 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 636 if (error) 637 panic("cannot find root vnode, error=%d", error); 638 cwdi0.cwdi_cdir = rootvnode; 639 VREF(cwdi0.cwdi_cdir); 640 VOP_UNLOCK(rootvnode, 0); 641 cwdi0.cwdi_rdir = NULL; 642 643 /* 644 * Now that root is mounted, we can fixup initproc's CWD 645 * info. All other processes are kthreads, which merely 646 * share proc0's CWD info. 647 */ 648 initproc->p_cwdi->cwdi_cdir = rootvnode; 649 VREF(initproc->p_cwdi->cwdi_cdir); 650 initproc->p_cwdi->cwdi_rdir = NULL; 651 652 /* 653 * Now can look at time, having had a chance to verify the time 654 * from the file system. Reset l->l_rtime as it may have been 655 * munched in mi_switch() after the time got set. 656 */ 657 getmicrotime(&time); 658 boottime = time; 659 mutex_enter(proc_lock); 660 LIST_FOREACH(p, &allproc, p_list) { 661 KASSERT((p->p_flag & PK_MARKER) == 0); 662 mutex_enter(p->p_lock); 663 p->p_stats->p_start = time; 664 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 665 lwp_lock(l); 666 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 667 lwp_unlock(l); 668 } 669 mutex_exit(p->p_lock); 670 } 671 mutex_exit(proc_lock); 672 binuptime(&curlwp->l_stime); 673 674 for (CPU_INFO_FOREACH(cii, ci)) { 675 ci->ci_schedstate.spc_lastmod = time_second; 676 } 677 678 /* Create the pageout daemon kernel thread. */ 679 uvm_swap_init(); 680 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 681 NULL, NULL, "pgdaemon")) 682 panic("fork pagedaemon"); 683 684 /* Create the filesystem syncer kernel thread. */ 685 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 686 NULL, NULL, "ioflush")) 687 panic("fork syncer"); 688 689 /* Create the aiodone daemon kernel thread. */ 690 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 691 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 692 panic("fork aiodoned"); 693 694 vmem_rehash_start(); 695 696 /* Initialize exec structures */ 697 exec_init(1); 698 699 /* 700 * Okay, now we can let init(8) exec! It's off to userland! 701 */ 702 mutex_enter(proc_lock); 703 start_init_exec = 1; 704 cv_broadcast(&lbolt); 705 mutex_exit(proc_lock); 706 707 /* The scheduler is an infinite loop. */ 708 uvm_scheduler(); 709 /* NOTREACHED */ 710 } 711 712 static void 713 check_console(struct lwp *l) 714 { 715 struct nameidata nd; 716 int error; 717 718 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console"); 719 error = namei(&nd); 720 if (error == 0) 721 vrele(nd.ni_vp); 722 else if (error == ENOENT) 723 printf("warning: no /dev/console\n"); 724 else 725 printf("warning: lookup /dev/console: error %d\n", error); 726 } 727 728 /* 729 * List of paths to try when searching for "init". 730 */ 731 static const char * const initpaths[] = { 732 "/sbin/init", 733 "/sbin/oinit", 734 "/sbin/init.bak", 735 NULL, 736 }; 737 738 /* 739 * Start the initial user process; try exec'ing each pathname in "initpaths". 740 * The program is invoked with one argument containing the boot flags. 741 */ 742 static void 743 start_init(void *arg) 744 { 745 struct lwp *l = arg; 746 struct proc *p = l->l_proc; 747 vaddr_t addr; 748 struct sys_execve_args /* { 749 syscallarg(const char *) path; 750 syscallarg(char * const *) argp; 751 syscallarg(char * const *) envp; 752 } */ args; 753 int options, i, error; 754 register_t retval[2]; 755 char flags[4], *flagsp; 756 const char *path, *slash; 757 char *ucp, **uap, *arg0, *arg1 = NULL; 758 char ipath[129]; 759 int ipx, len; 760 761 /* 762 * Now in process 1. 763 */ 764 strncpy(p->p_comm, "init", MAXCOMLEN); 765 766 /* 767 * Wait for main() to tell us that it's safe to exec. 768 */ 769 mutex_enter(proc_lock); 770 while (start_init_exec == 0) 771 cv_wait(&lbolt, proc_lock); 772 mutex_exit(proc_lock); 773 774 /* 775 * This is not the right way to do this. We really should 776 * hand-craft a descriptor onto /dev/console to hand to init, 777 * but that's a _lot_ more work, and the benefit from this easy 778 * hack makes up for the "good is the enemy of the best" effect. 779 */ 780 check_console(l); 781 782 /* 783 * Need just enough stack to hold the faked-up "execve()" arguments. 784 */ 785 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 786 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 787 NULL, UVM_UNKNOWN_OFFSET, 0, 788 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 789 UVM_ADV_NORMAL, 790 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 791 panic("init: couldn't allocate argument space"); 792 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 793 794 ipx = 0; 795 while (1) { 796 if (boothowto & RB_ASKNAME) { 797 printf("init path"); 798 if (initpaths[ipx]) 799 printf(" (default %s)", initpaths[ipx]); 800 printf(": "); 801 len = cngetsn(ipath, sizeof(ipath)-1); 802 if (len == 4 && strcmp(ipath, "halt") == 0) { 803 cpu_reboot(RB_HALT, NULL); 804 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 805 cpu_reboot(0, NULL); 806 #if defined(DDB) 807 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 808 console_debugger(); 809 continue; 810 #endif 811 } else if (len > 0 && ipath[0] == '/') { 812 ipath[len] = '\0'; 813 path = ipath; 814 } else if (len == 0 && initpaths[ipx] != NULL) { 815 path = initpaths[ipx++]; 816 } else { 817 printf("use absolute path, "); 818 #if defined(DDB) 819 printf("\"ddb\", "); 820 #endif 821 printf("\"halt\", or \"reboot\"\n"); 822 continue; 823 } 824 } else { 825 if ((path = initpaths[ipx++]) == NULL) { 826 ipx = 0; 827 boothowto |= RB_ASKNAME; 828 continue; 829 } 830 } 831 832 ucp = (char *)USRSTACK; 833 834 /* 835 * Construct the boot flag argument. 836 */ 837 flagsp = flags; 838 *flagsp++ = '-'; 839 options = 0; 840 841 if (boothowto & RB_SINGLE) { 842 *flagsp++ = 's'; 843 options = 1; 844 } 845 #ifdef notyet 846 if (boothowto & RB_FASTBOOT) { 847 *flagsp++ = 'f'; 848 options = 1; 849 } 850 #endif 851 852 /* 853 * Move out the flags (arg 1), if necessary. 854 */ 855 if (options != 0) { 856 *flagsp++ = '\0'; 857 i = flagsp - flags; 858 #ifdef DEBUG 859 printf("init: copying out flags `%s' %d\n", flags, i); 860 #endif 861 arg1 = STACK_ALLOC(ucp, i); 862 ucp = STACK_MAX(arg1, i); 863 (void)copyout((void *)flags, arg1, i); 864 } 865 866 /* 867 * Move out the file name (also arg 0). 868 */ 869 i = strlen(path) + 1; 870 #ifdef DEBUG 871 printf("init: copying out path `%s' %d\n", path, i); 872 #else 873 if (boothowto & RB_ASKNAME || path != initpaths[0]) 874 printf("init: trying %s\n", path); 875 #endif 876 arg0 = STACK_ALLOC(ucp, i); 877 ucp = STACK_MAX(arg0, i); 878 (void)copyout(path, arg0, i); 879 880 /* 881 * Move out the arg pointers. 882 */ 883 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 884 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 885 SCARG(&args, path) = arg0; 886 SCARG(&args, argp) = uap; 887 SCARG(&args, envp) = NULL; 888 slash = strrchr(path, '/'); 889 if (slash) 890 (void)suword((void *)uap++, 891 (long)arg0 + (slash + 1 - path)); 892 else 893 (void)suword((void *)uap++, (long)arg0); 894 if (options != 0) 895 (void)suword((void *)uap++, (long)arg1); 896 (void)suword((void *)uap++, 0); /* terminator */ 897 898 /* 899 * Now try to exec the program. If can't for any reason 900 * other than it doesn't exist, complain. 901 */ 902 error = sys_execve(l, &args, retval); 903 if (error == 0 || error == EJUSTRETURN) { 904 KERNEL_UNLOCK_LAST(l); 905 return; 906 } 907 printf("exec %s: error %d\n", path, error); 908 } 909 printf("init: not found\n"); 910 panic("no init"); 911 } 912 913 /* 914 * calculate cache size from physmem and vm_map size. 915 */ 916 vaddr_t 917 calc_cache_size(struct vm_map *map, int pct, int va_pct) 918 { 919 paddr_t t; 920 921 /* XXX should consider competing cache if any */ 922 /* XXX should consider submaps */ 923 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 924 if (map != NULL) { 925 vsize_t vsize; 926 927 vsize = vm_map_max(map) - vm_map_min(map); 928 vsize = (uintmax_t)vsize * va_pct / 100; 929 if (t > vsize) { 930 t = vsize; 931 } 932 } 933 return t; 934 } 935
Indexes created Sun Sep 21 20:09:37 GMT 2025