1 /* $OpenBSD: init_main.c,v 1.77 2001/09/17 19:17:30 gluk Exp $ */ 2 /* $NetBSD: init_main.c,v 1.84.4.1 1996/06/02 09:08:06 mrg Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 43 */ 44 45 #include <sys/param.h> 46 #include <sys/filedesc.h> 47 #include <sys/file.h> 48 #include <sys/errno.h> 49 #include <sys/exec.h> 50 #include <sys/kernel.h> 51 #include <sys/kthread.h> 52 #include <sys/mount.h> 53 #include <sys/map.h> 54 #include <sys/proc.h> 55 #include <sys/resourcevar.h> 56 #include <sys/signalvar.h> 57 #include <sys/systm.h> 58 #include <sys/namei.h> 59 #include <sys/vnode.h> 60 #include <sys/tty.h> 61 #include <sys/conf.h> 62 #include <sys/buf.h> 63 #include <sys/device.h> 64 #include <sys/protosw.h> 65 #include <sys/reboot.h> 66 #include <sys/user.h> 67 #ifdef SYSVSHM 68 #include <sys/shm.h> 69 #endif 70 #ifdef SYSVSEM 71 #include <sys/sem.h> 72 #endif 73 #ifdef SYSVMSG 74 #include <sys/msg.h> 75 #endif 76 #include <sys/domain.h> 77 #include <sys/mbuf.h> 78 #include <sys/pipe.h> 79 80 #include <sys/syscall.h> 81 #include <sys/syscallargs.h> 82 83 #include <ufs/ufs/quota.h> 84 85 #include <machine/cpu.h> 86 87 #include <vm/vm.h> 88 89 #include <uvm/uvm.h> 90 91 #include <net/if.h> 92 #include <net/raw_cb.h> 93 94 #if defined(CRYPTO) 95 #include <crypto/cryptodev.h> 96 #include <crypto/cryptosoft.h> 97 #endif 98 99 #if defined(NFSSERVER) || defined(NFSCLIENT) 100 extern void nfs_init __P((void)); 101 #endif 102 103 char copyright[] = 104 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 105 "\tThe Regents of the University of California. All rights reserved.\n" 106 "Copyright (c) 1995-2001 OpenBSD. All rights reserved. http://www.OpenBSD.org\n"; 107 108 /* Components of the first process -- never freed. */ 109 struct session session0; 110 struct pgrp pgrp0; 111 struct proc proc0; 112 struct pcred cred0; 113 struct filedesc0 filedesc0; 114 struct plimit limit0; 115 struct vmspace vmspace0; 116 struct sigacts sigacts0; 117 #ifndef curproc 118 struct proc *curproc; 119 #endif 120 struct proc *initproc; 121 122 int cmask = CMASK; 123 extern struct user *proc0paddr; 124 125 void (*md_diskconf) __P((void)) = NULL; 126 struct vnode *rootvp, *swapdev_vp; 127 int boothowto; 128 struct timeval boottime; 129 struct timeval runtime; 130 131 /* XXX return int so gcc -Werror won't complain */ 132 int main __P((void *)); 133 void check_console __P((struct proc *)); 134 void start_init __P((void *)); 135 void start_pagedaemon __P((void *)); 136 void start_flusher __P((void *)); 137 void start_update __P((void *)); 138 void start_reaper __P((void *)); 139 void start_crypto __P((void *)); 140 141 extern char sigcode[], esigcode[]; 142 #ifdef SYSCALL_DEBUG 143 extern char *syscallnames[]; 144 #endif 145 146 struct emul emul_native = { 147 "native", 148 NULL, 149 sendsig, 150 SYS_syscall, 151 SYS_MAXSYSCALL, 152 sysent, 153 #ifdef SYSCALL_DEBUG 154 syscallnames, 155 #else 156 NULL, 157 #endif 158 0, 159 copyargs, 160 setregs, 161 NULL, 162 sigcode, 163 esigcode, 164 }; 165 166 /* 167 * System startup; initialize the world, create process 0, mount root 168 * filesystem, and fork to create init and pagedaemon. Most of the 169 * hard work is done in the lower-level initialization routines including 170 * startup(), which does memory initialization and autoconfiguration. 171 */ 172 /* XXX return int, so gcc -Werror won't complain */ 173 int 174 main(framep) 175 void *framep; /* XXX should go away */ 176 { 177 register struct proc *p; 178 register struct pdevinit *pdev; 179 struct timeval rtv; 180 register int i; 181 int s; 182 register_t rval[2]; 183 extern struct pdevinit pdevinit[]; 184 extern void scheduler_start __P((void)); 185 extern void disk_init __P((void)); 186 extern void endtsleep __P((void *)); 187 extern void realitexpire __P((void *)); 188 189 /* 190 * Initialize the current process pointer (curproc) before 191 * any possible traps/probes to simplify trap processing. 192 */ 193 p = &proc0; 194 curproc = p; 195 196 /* 197 * Attempt to find console and initialize 198 * in case of early panic or other messages. 199 */ 200 config_init(); /* init autoconfiguration data structures */ 201 consinit(); 202 printf(copyright); 203 printf("\n"); 204 205 uvm_init(); 206 disk_init(); /* must come before autoconfiguration */ 207 tty_init(); /* initialise tty's */ 208 cpu_startup(); 209 210 /* 211 * Initialize mbuf's. Do this now because we might attempt to 212 * allocate mbufs or mbuf clusters during autoconfiguration. 213 */ 214 mbinit(); 215 216 /* 217 * Initialize timeouts. 218 */ 219 timeout_startup(); 220 221 cpu_configure(); 222 223 /* Initialize sysctls (must be done before any processes run) */ 224 sysctl_init(); 225 226 /* 227 * Initialize process and pgrp structures. 228 */ 229 procinit(); 230 231 /* 232 * Initialize filedescriptors. 233 */ 234 filedesc_init(); 235 236 /* 237 * Initialize pipes. 238 */ 239 pipe_init(); 240 241 /* 242 * Create process 0 (the swapper). 243 */ 244 LIST_INSERT_HEAD(&allproc, p, p_list); 245 p->p_pgrp = &pgrp0; 246 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 247 LIST_INIT(&pgrp0.pg_members); 248 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 249 250 pgrp0.pg_session = &session0; 251 session0.s_count = 1; 252 session0.s_leader = p; 253 254 p->p_flag = P_INMEM | P_SYSTEM | P_NOCLDWAIT; 255 p->p_stat = SRUN; 256 p->p_nice = NZERO; 257 p->p_emul = &emul_native; 258 bcopy("swapper", p->p_comm, sizeof ("swapper")); 259 260 /* Init timeouts. */ 261 timeout_set(&p->p_sleep_to, endtsleep, p); 262 timeout_set(&p->p_realit_to, realitexpire, p); 263 264 /* Create credentials. */ 265 cred0.p_refcnt = 1; 266 p->p_cred = &cred0; 267 p->p_ucred = crget(); 268 p->p_ucred->cr_ngroups = 1; /* group 0 */ 269 270 /* Create the file descriptor table. */ 271 p->p_fd = &filedesc0.fd_fd; 272 filedesc0.fd_fd.fd_refcnt = 1; 273 filedesc0.fd_fd.fd_cmask = cmask; 274 filedesc0.fd_fd.fd_ofiles = filedesc0.fd_dfiles; 275 filedesc0.fd_fd.fd_ofileflags = filedesc0.fd_dfileflags; 276 filedesc0.fd_fd.fd_nfiles = NDFILE; 277 filedesc0.fd_fd.fd_himap = filedesc0.fd_dhimap; 278 filedesc0.fd_fd.fd_lomap = filedesc0.fd_dlomap; 279 280 /* Create the limits structures. */ 281 p->p_limit = &limit0; 282 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 283 limit0.pl_rlimit[i].rlim_cur = 284 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 285 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 286 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 287 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 288 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 289 i = ptoa(uvmexp.free); 290 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i; 291 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i; 292 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3; 293 limit0.p_refcnt = 1; 294 295 /* Allocate a prototype map so we have something to fork. */ 296 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 297 trunc_page(VM_MAX_ADDRESS), TRUE); 298 p->p_vmspace = &vmspace0; 299 300 p->p_addr = proc0paddr; /* XXX */ 301 302 /* 303 * We continue to place resource usage info in the 304 * user struct so they're pageable. 305 */ 306 p->p_stats = &p->p_addr->u_stats; 307 308 /* 309 * Charge root for one process. 310 */ 311 (void)chgproccnt(0, 1); 312 313 rqinit(); 314 315 /* Configure virtual memory system, set vm rlimits. */ 316 uvm_init_limits(p); 317 318 /* Initialize the file systems. */ 319 #if defined(NFSSERVER) || defined(NFSCLIENT) 320 nfs_init(); /* initialize server/shared data */ 321 #endif 322 vfsinit(); 323 324 /* Start real time and statistics clocks. */ 325 initclocks(); 326 327 #ifdef SYSVSHM 328 /* Initialize System V style shared memory. */ 329 shminit(); 330 #endif 331 332 #ifdef SYSVSEM 333 /* Initialize System V style semaphores. */ 334 seminit(); 335 #endif 336 337 #ifdef SYSVMSG 338 /* Initialize System V style message queues. */ 339 msginit(); 340 #endif 341 342 /* Attach pseudo-devices. */ 343 randomattach(); 344 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 345 if (pdev->pdev_count > 0) 346 (*pdev->pdev_attach)(pdev->pdev_count); 347 348 #ifdef CRYPTO 349 swcr_init(); 350 #endif /* CRYPTO */ 351 352 /* 353 * Initialize protocols. Block reception of incoming packets 354 * until everything is ready. 355 */ 356 s = splimp(); 357 ifinit(); 358 domaininit(); 359 splx(s); 360 361 #ifdef GPROF 362 /* Initialize kernel profiling. */ 363 kmstartup(); 364 #endif 365 366 /* Start the scheduler */ 367 scheduler_start(); 368 369 dostartuphooks(); 370 371 /* Configure root/swap devices */ 372 if (md_diskconf) 373 (*md_diskconf)(); 374 375 /* Mount the root file system. */ 376 if (vfs_mountroot()) 377 panic("cannot mount root"); 378 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 379 380 /* Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to reference it. */ 381 if (VFS_ROOT(mountlist.cqh_first, &rootvnode)) 382 panic("cannot find root vnode"); 383 filedesc0.fd_fd.fd_cdir = rootvnode; 384 VREF(filedesc0.fd_fd.fd_cdir); 385 VOP_UNLOCK(rootvnode, 0, p); 386 filedesc0.fd_fd.fd_rdir = NULL; 387 388 uvm_swap_init(); 389 390 /* 391 * Now can look at time, having had a chance to verify the time 392 * from the file system. Reset p->p_rtime as it may have been 393 * munched in mi_switch() after the time got set. 394 */ 395 p->p_stats->p_start = runtime = mono_time = boottime = time; 396 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 397 398 /* Initialize signal state for process 0. */ 399 signal_init(); 400 p->p_sigacts = &sigacts0; 401 siginit(p); 402 403 /* Create process 1 (init(8)). */ 404 if (fork1(p, SIGCHLD, FORK_FORK, NULL, 0, rval)) 405 panic("fork init"); 406 initproc = pfind(rval[0]); 407 cpu_set_kpc(initproc, start_init, initproc); 408 409 /* Create process 2, the pageout daemon kernel thread. */ 410 if (kthread_create(start_pagedaemon, NULL, NULL, "pagedaemon")) 411 panic("fork pagedaemon"); 412 413 /* Create process 3, the reaper daemon kernel thread. */ 414 if (kthread_create(start_reaper, NULL, NULL, "reaper")) 415 panic("fork reaper"); 416 417 /* Create process 4, the flusher daemon kernel thread. */ 418 if (kthread_create(start_flusher, NULL, NULL, "flusher")) 419 panic("fork flusher"); 420 421 /* Create process 5, the update daemon kernel thread. */ 422 if (kthread_create(start_update, NULL, NULL, "update")) 423 panic("fork update"); 424 425 #ifdef CRYPTO 426 /* Create process 6, the crypto kernel thread. */ 427 if (kthread_create(start_crypto, NULL, NULL, "crypto")) 428 panic("crypto thread"); 429 #endif /* CRYPTO */ 430 431 /* Create any other deferred kernel threads. */ 432 kthread_run_deferred_queue(); 433 434 microtime(&rtv); 435 srandom((u_long)(rtv.tv_sec ^ rtv.tv_usec)); 436 437 randompid = 1; 438 /* The scheduler is an infinite loop. */ 439 uvm_scheduler(); 440 /* NOTREACHED */ 441 } 442 443 /* 444 * List of paths to try when searching for "init". 445 */ 446 static char *initpaths[] = { 447 "/sbin/init", 448 "/sbin/oinit", 449 "/sbin/init.bak", 450 NULL, 451 }; 452 453 void 454 check_console(p) 455 struct proc *p; 456 { 457 struct nameidata nd; 458 int error; 459 460 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 461 error = namei(&nd); 462 if (error) { 463 if (error == ENOENT) 464 printf("warning: /dev/console does not exist\n"); 465 else 466 printf("warning: /dev/console error %d\n", error); 467 } else 468 vrele(nd.ni_vp); 469 } 470 471 /* 472 * Start the initial user process; try exec'ing each pathname in "initpaths". 473 * The program is invoked with one argument containing the boot flags. 474 */ 475 void 476 start_init(arg) 477 void *arg; 478 { 479 struct proc *p = arg; 480 vaddr_t addr; 481 struct sys_execve_args /* { 482 syscallarg(char *) path; 483 syscallarg(char **) argp; 484 syscallarg(char **) envp; 485 } */ args; 486 int options, i, error; 487 register_t retval[2]; 488 char flags[4], *flagsp; 489 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 490 491 /* 492 * Now in process 1. 493 */ 494 check_console(p); 495 496 /* 497 * Need just enough stack to hold the faked-up "execve()" arguments. 498 */ 499 #ifdef MACHINE_STACK_GROWS_UP 500 addr = USRSTACK; 501 #else 502 addr = USRSTACK - PAGE_SIZE; 503 #endif 504 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 505 NULL, UVM_UNKNOWN_OFFSET, 506 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 507 UVM_ADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) 508 != KERN_SUCCESS) 509 panic("init: couldn't allocate argument space"); 510 #ifdef MACHINE_STACK_GROWS_UP 511 p->p_vmspace->vm_maxsaddr = (caddr_t)addr + PAGE_SIZE; 512 #else 513 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 514 #endif 515 516 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 517 #ifdef MACHINE_STACK_GROWS_UP 518 ucp = (char *)addr; 519 #else 520 ucp = (char *)(addr + PAGE_SIZE); 521 #endif 522 /* 523 * Construct the boot flag argument. 524 */ 525 flagsp = flags; 526 *flagsp++ = '-'; 527 options = 0; 528 529 if (boothowto & RB_SINGLE) { 530 *flagsp++ = 's'; 531 options = 1; 532 } 533 #ifdef notyet 534 if (boothowto & RB_FASTBOOT) { 535 *flagsp++ = 'f'; 536 options = 1; 537 } 538 #endif 539 540 /* 541 * Move out the flags (arg 1), if necessary. 542 */ 543 if (options != 0) { 544 *flagsp++ = '\0'; 545 i = flagsp - flags; 546 #ifdef DEBUG 547 printf("init: copying out flags `%s' %d\n", flags, i); 548 #endif 549 #ifdef MACHINE_STACK_GROWS_UP 550 arg1 = ucp; 551 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 552 ucp += i; 553 #else 554 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 555 arg1 = ucp; 556 #endif 557 } 558 559 /* 560 * Move out the file name (also arg 0). 561 */ 562 i = strlen(path) + 1; 563 #ifdef DEBUG 564 printf("init: copying out path `%s' %d\n", path, i); 565 #endif 566 #ifdef MACHINE_STACK_GROWS_UP 567 arg0 = ucp; 568 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 569 ucp += i; 570 ucp = (caddr_t)ALIGN((u_long)ucp); 571 uap = (char **)ucp + 3; 572 #else 573 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 574 arg0 = ucp; 575 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 576 #endif 577 578 /* 579 * Move out the arg pointers. 580 */ 581 (void)suword((caddr_t)--uap, 0); /* terminator */ 582 if (options != 0) 583 (void)suword((caddr_t)--uap, (long)arg1); 584 (void)suword((caddr_t)--uap, (long)arg0); 585 586 /* 587 * Point at the arguments. 588 */ 589 SCARG(&args, path) = arg0; 590 SCARG(&args, argp) = uap; 591 SCARG(&args, envp) = NULL; 592 593 /* 594 * Now try to exec the program. If can't for any reason 595 * other than it doesn't exist, complain. 596 */ 597 if ((error = sys_execve(p, &args, retval)) == 0) 598 return; 599 if (error != ENOENT) 600 printf("exec %s: error %d\n", path, error); 601 } 602 printf("init: not found\n"); 603 panic("no init"); 604 } 605 606 void 607 start_pagedaemon(arg) 608 void *arg; 609 { 610 uvm_pageout(); 611 /* NOTREACHED */ 612 } 613 614 void 615 start_update(arg) 616 void *arg; 617 { 618 sched_sync(curproc); 619 /* NOTREACHED */ 620 } 621 622 void 623 start_flusher(arg) 624 void *arg; 625 { 626 buf_daemon(curproc); 627 /* NOTREACHED */ 628 } 629 630 void 631 start_reaper(arg) 632 void *arg; 633 { 634 reaper(); 635 /* NOTREACHED */ 636 } 637 638 #ifdef CRYPTO 639 void 640 start_crypto(arg) 641 void *arg; 642 { 643 crypto_thread(); 644 /* NOTREACHED */ 645 } 646 #endif /* CRYPTO */ 647