1 /*- 2 * Copyright (c) 1995 Terrence R. Lambert 3 * All rights reserved. 4 * 5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 42 */ 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include "opt_ddb.h" 48 #include "opt_init_path.h" 49 #include "opt_verbose_sysinit.h" 50 51 #include <sys/param.h> 52 #include <sys/kernel.h> 53 #include <sys/exec.h> 54 #include <sys/file.h> 55 #include <sys/filedesc.h> 56 #include <sys/jail.h> 57 #include <sys/ktr.h> 58 #include <sys/lock.h> 59 #include <sys/loginclass.h> 60 #include <sys/mount.h> 61 #include <sys/mutex.h> 62 #include <sys/syscallsubr.h> 63 #include <sys/sysctl.h> 64 #include <sys/proc.h> 65 #include <sys/racct.h> 66 #include <sys/resourcevar.h> 67 #include <sys/systm.h> 68 #include <sys/signalvar.h> 69 #include <sys/vnode.h> 70 #include <sys/sysent.h> 71 #include <sys/reboot.h> 72 #include <sys/sched.h> 73 #include <sys/sx.h> 74 #include <sys/sysproto.h> 75 #include <sys/vmmeter.h> 76 #include <sys/unistd.h> 77 #include <sys/malloc.h> 78 #include <sys/conf.h> 79 #include <sys/cpuset.h> 80 81 #include <machine/cpu.h> 82 83 #include <security/audit/audit.h> 84 #include <security/mac/mac_framework.h> 85 86 #include <vm/vm.h> 87 #include <vm/vm_param.h> 88 #include <vm/pmap.h> 89 #include <vm/vm_map.h> 90 #include <vm/vm_domain.h> 91 #include <sys/copyright.h> 92 93 #include <ddb/ddb.h> 94 #include <ddb/db_sym.h> 95 96 void mi_startup(void); /* Should be elsewhere */ 97 98 /* Components of the first process -- never freed. */ 99 static struct session session0; 100 static struct pgrp pgrp0; 101 struct proc proc0; 102 struct thread thread0 __aligned(16); 103 struct vmspace vmspace0; 104 struct proc *initproc; 105 106 #ifndef BOOTHOWTO 107 #define BOOTHOWTO 0 108 #endif 109 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 110 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 111 "Boot control flags, passed from loader"); 112 113 #ifndef BOOTVERBOSE 114 #define BOOTVERBOSE 0 115 #endif 116 int bootverbose = BOOTVERBOSE; 117 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 118 "Control the output of verbose kernel messages"); 119 120 /* 121 * This ensures that there is at least one entry so that the sysinit_set 122 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 123 * executed. 124 */ 125 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 126 127 /* 128 * The sysinit table itself. Items are checked off as the are run. 129 * If we want to register new sysinit types, add them to newsysinit. 130 */ 131 SET_DECLARE(sysinit_set, struct sysinit); 132 struct sysinit **sysinit, **sysinit_end; 133 struct sysinit **newsysinit, **newsysinit_end; 134 135 /* 136 * Merge a new sysinit set into the current set, reallocating it if 137 * necessary. This can only be called after malloc is running. 138 */ 139 void 140 sysinit_add(struct sysinit **set, struct sysinit **set_end) 141 { 142 struct sysinit **newset; 143 struct sysinit **sipp; 144 struct sysinit **xipp; 145 int count; 146 147 count = set_end - set; 148 if (newsysinit) 149 count += newsysinit_end - newsysinit; 150 else 151 count += sysinit_end - sysinit; 152 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 153 if (newset == NULL) 154 panic("cannot malloc for sysinit"); 155 xipp = newset; 156 if (newsysinit) 157 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 158 *xipp++ = *sipp; 159 else 160 for (sipp = sysinit; sipp < sysinit_end; sipp++) 161 *xipp++ = *sipp; 162 for (sipp = set; sipp < set_end; sipp++) 163 *xipp++ = *sipp; 164 if (newsysinit) 165 free(newsysinit, M_TEMP); 166 newsysinit = newset; 167 newsysinit_end = newset + count; 168 } 169 170 #if defined (DDB) && defined(VERBOSE_SYSINIT) 171 static const char * 172 symbol_name(vm_offset_t va, db_strategy_t strategy) 173 { 174 const char *name; 175 c_db_sym_t sym; 176 db_expr_t offset; 177 178 if (va == 0) 179 return (NULL); 180 sym = db_search_symbol(va, strategy, &offset); 181 if (offset != 0) 182 return (NULL); 183 db_symbol_values(sym, &name, NULL); 184 return (name); 185 } 186 #endif 187 188 /* 189 * System startup; initialize the world, create process 0, mount root 190 * filesystem, and fork to create init and pagedaemon. Most of the 191 * hard work is done in the lower-level initialization routines including 192 * startup(), which does memory initialization and autoconfiguration. 193 * 194 * This allows simple addition of new kernel subsystems that require 195 * boot time initialization. It also allows substitution of subsystem 196 * (for instance, a scheduler, kernel profiler, or VM system) by object 197 * module. Finally, it allows for optional "kernel threads". 198 */ 199 void 200 mi_startup(void) 201 { 202 203 register struct sysinit **sipp; /* system initialization*/ 204 register struct sysinit **xipp; /* interior loop of sort*/ 205 register struct sysinit *save; /* bubble*/ 206 207 #if defined(VERBOSE_SYSINIT) 208 int last; 209 int verbose; 210 #endif 211 212 if (boothowto & RB_VERBOSE) 213 bootverbose++; 214 215 if (sysinit == NULL) { 216 sysinit = SET_BEGIN(sysinit_set); 217 sysinit_end = SET_LIMIT(sysinit_set); 218 } 219 220 restart: 221 /* 222 * Perform a bubble sort of the system initialization objects by 223 * their subsystem (primary key) and order (secondary key). 224 */ 225 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 226 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 227 if ((*sipp)->subsystem < (*xipp)->subsystem || 228 ((*sipp)->subsystem == (*xipp)->subsystem && 229 (*sipp)->order <= (*xipp)->order)) 230 continue; /* skip*/ 231 save = *sipp; 232 *sipp = *xipp; 233 *xipp = save; 234 } 235 } 236 237 #if defined(VERBOSE_SYSINIT) 238 last = SI_SUB_COPYRIGHT; 239 verbose = 0; 240 #if !defined(DDB) 241 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 242 #endif 243 #endif 244 245 /* 246 * Traverse the (now) ordered list of system initialization tasks. 247 * Perform each task, and continue on to the next task. 248 */ 249 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 250 251 if ((*sipp)->subsystem == SI_SUB_DUMMY) 252 continue; /* skip dummy task(s)*/ 253 254 if ((*sipp)->subsystem == SI_SUB_DONE) 255 continue; 256 257 #if defined(VERBOSE_SYSINIT) 258 if ((*sipp)->subsystem > last) { 259 verbose = 1; 260 last = (*sipp)->subsystem; 261 printf("subsystem %x\n", last); 262 } 263 if (verbose) { 264 #if defined(DDB) 265 const char *func, *data; 266 267 func = symbol_name((vm_offset_t)(*sipp)->func, 268 DB_STGY_PROC); 269 data = symbol_name((vm_offset_t)(*sipp)->udata, 270 DB_STGY_ANY); 271 if (func != NULL && data != NULL) 272 printf(" %s(&%s)... ", func, data); 273 else if (func != NULL) 274 printf(" %s(%p)... ", func, (*sipp)->udata); 275 else 276 #endif 277 printf(" %p(%p)... ", (*sipp)->func, 278 (*sipp)->udata); 279 } 280 #endif 281 282 /* Call function */ 283 (*((*sipp)->func))((*sipp)->udata); 284 285 #if defined(VERBOSE_SYSINIT) 286 if (verbose) 287 printf("done.\n"); 288 #endif 289 290 /* Check off the one we're just done */ 291 (*sipp)->subsystem = SI_SUB_DONE; 292 293 /* Check if we've installed more sysinit items via KLD */ 294 if (newsysinit != NULL) { 295 if (sysinit != SET_BEGIN(sysinit_set)) 296 free(sysinit, M_TEMP); 297 sysinit = newsysinit; 298 sysinit_end = newsysinit_end; 299 newsysinit = NULL; 300 newsysinit_end = NULL; 301 goto restart; 302 } 303 } 304 305 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 306 mtx_unlock(&Giant); 307 308 /* 309 * Now hand over this thread to swapper. 310 */ 311 swapper(); 312 /* NOTREACHED*/ 313 } 314 315 316 /* 317 *************************************************************************** 318 **** 319 **** The following SYSINIT's belong elsewhere, but have not yet 320 **** been moved. 321 **** 322 *************************************************************************** 323 */ 324 static void 325 print_caddr_t(void *data) 326 { 327 printf("%s", (char *)data); 328 } 329 330 static void 331 print_version(void *data __unused) 332 { 333 int len; 334 335 /* Strip a trailing newline from version. */ 336 len = strlen(version); 337 while (len > 0 && version[len - 1] == '\n') 338 len--; 339 printf("%.*s %s\n", len, version, machine); 340 printf("%s\n", compiler_version); 341 } 342 343 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 344 copyright); 345 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 346 trademark); 347 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 348 349 #ifdef WITNESS 350 static char wit_warn[] = 351 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 352 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1, 353 print_caddr_t, wit_warn); 354 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 1, 355 print_caddr_t, wit_warn); 356 #endif 357 358 #ifdef DIAGNOSTIC 359 static char diag_warn[] = 360 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 361 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2, 362 print_caddr_t, diag_warn); 363 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 2, 364 print_caddr_t, diag_warn); 365 #endif 366 367 static int 368 null_fetch_syscall_args(struct thread *td __unused, 369 struct syscall_args *sa __unused) 370 { 371 372 panic("null_fetch_syscall_args"); 373 } 374 375 static void 376 null_set_syscall_retval(struct thread *td __unused, int error __unused) 377 { 378 379 panic("null_set_syscall_retval"); 380 } 381 382 struct sysentvec null_sysvec = { 383 .sv_size = 0, 384 .sv_table = NULL, 385 .sv_mask = 0, 386 .sv_sigsize = 0, 387 .sv_sigtbl = NULL, 388 .sv_errsize = 0, 389 .sv_errtbl = NULL, 390 .sv_transtrap = NULL, 391 .sv_fixup = NULL, 392 .sv_sendsig = NULL, 393 .sv_sigcode = NULL, 394 .sv_szsigcode = NULL, 395 .sv_prepsyscall = NULL, 396 .sv_name = "null", 397 .sv_coredump = NULL, 398 .sv_imgact_try = NULL, 399 .sv_minsigstksz = 0, 400 .sv_pagesize = PAGE_SIZE, 401 .sv_minuser = VM_MIN_ADDRESS, 402 .sv_maxuser = VM_MAXUSER_ADDRESS, 403 .sv_usrstack = USRSTACK, 404 .sv_psstrings = PS_STRINGS, 405 .sv_stackprot = VM_PROT_ALL, 406 .sv_copyout_strings = NULL, 407 .sv_setregs = NULL, 408 .sv_fixlimit = NULL, 409 .sv_maxssiz = NULL, 410 .sv_flags = 0, 411 .sv_set_syscall_retval = null_set_syscall_retval, 412 .sv_fetch_syscall_args = null_fetch_syscall_args, 413 .sv_syscallnames = NULL, 414 .sv_schedtail = NULL, 415 .sv_thread_detach = NULL, 416 }; 417 418 /* 419 *************************************************************************** 420 **** 421 **** The two following SYSINIT's are proc0 specific glue code. I am not 422 **** convinced that they can not be safely combined, but their order of 423 **** operation has been maintained as the same as the original init_main.c 424 **** for right now. 425 **** 426 **** These probably belong in init_proc.c or kern_proc.c, since they 427 **** deal with proc0 (the fork template process). 428 **** 429 *************************************************************************** 430 */ 431 /* ARGSUSED*/ 432 static void 433 proc0_init(void *dummy __unused) 434 { 435 struct proc *p; 436 struct thread *td; 437 struct ucred *newcred; 438 vm_paddr_t pageablemem; 439 int i; 440 441 GIANT_REQUIRED; 442 p = &proc0; 443 td = &thread0; 444 445 /* 446 * Initialize magic number and osrel. 447 */ 448 p->p_magic = P_MAGIC; 449 p->p_osrel = osreldate; 450 451 /* 452 * Initialize thread and process structures. 453 */ 454 procinit(); /* set up proc zone */ 455 threadinit(); /* set up UMA zones */ 456 457 /* 458 * Initialise scheduler resources. 459 * Add scheduler specific parts to proc, thread as needed. 460 */ 461 schedinit(); /* scheduler gets its house in order */ 462 463 /* 464 * Create process 0 (the swapper). 465 */ 466 LIST_INSERT_HEAD(&allproc, p, p_list); 467 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 468 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 469 p->p_pgrp = &pgrp0; 470 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 471 LIST_INIT(&pgrp0.pg_members); 472 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 473 474 pgrp0.pg_session = &session0; 475 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 476 refcount_init(&session0.s_count, 1); 477 session0.s_leader = p; 478 479 p->p_sysent = &null_sysvec; 480 p->p_flag = P_SYSTEM | P_INMEM; 481 p->p_flag2 = 0; 482 p->p_state = PRS_NORMAL; 483 knlist_init_mtx(&p->p_klist, &p->p_mtx); 484 STAILQ_INIT(&p->p_ktr); 485 p->p_nice = NZERO; 486 /* pid_max cannot be greater than PID_MAX */ 487 td->td_tid = PID_MAX + 1; 488 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash); 489 td->td_state = TDS_RUNNING; 490 td->td_pri_class = PRI_TIMESHARE; 491 td->td_user_pri = PUSER; 492 td->td_base_user_pri = PUSER; 493 td->td_lend_user_pri = PRI_MAX; 494 td->td_priority = PVM; 495 td->td_base_pri = PVM; 496 td->td_oncpu = 0; 497 td->td_flags = TDF_INMEM; 498 td->td_pflags = TDP_KTHREAD; 499 td->td_cpuset = cpuset_thread0(); 500 vm_domain_policy_init(&td->td_vm_dom_policy); 501 vm_domain_policy_set(&td->td_vm_dom_policy, VM_POLICY_NONE, -1); 502 vm_domain_policy_init(&p->p_vm_dom_policy); 503 vm_domain_policy_set(&p->p_vm_dom_policy, VM_POLICY_NONE, -1); 504 prison0_init(); 505 p->p_peers = 0; 506 p->p_leader = p; 507 p->p_reaper = p; 508 LIST_INIT(&p->p_reaplist); 509 510 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 511 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 512 513 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 514 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 515 callout_init(&td->td_slpcallout, 1); 516 517 /* Create credentials. */ 518 newcred = crget(); 519 newcred->cr_ngroups = 1; /* group 0 */ 520 newcred->cr_uidinfo = uifind(0); 521 newcred->cr_ruidinfo = uifind(0); 522 newcred->cr_prison = &prison0; 523 newcred->cr_loginclass = loginclass_find("default"); 524 proc_set_cred_init(p, newcred); 525 #ifdef AUDIT 526 audit_cred_kproc0(newcred); 527 #endif 528 #ifdef MAC 529 mac_cred_create_swapper(newcred); 530 #endif 531 /* Create sigacts. */ 532 p->p_sigacts = sigacts_alloc(); 533 534 /* Initialize signal state for process 0. */ 535 siginit(&proc0); 536 537 /* Create the file descriptor table. */ 538 p->p_fd = fdinit(NULL, false); 539 p->p_fdtol = NULL; 540 541 /* Create the limits structures. */ 542 p->p_limit = lim_alloc(); 543 for (i = 0; i < RLIM_NLIMITS; i++) 544 p->p_limit->pl_rlimit[i].rlim_cur = 545 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 546 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 547 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 548 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 549 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 550 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 551 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 552 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 553 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 554 /* Cast to avoid overflow on i386/PAE. */ 555 pageablemem = ptoa((vm_paddr_t)vm_cnt.v_free_count); 556 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 557 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 558 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 559 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 560 p->p_cpulimit = RLIM_INFINITY; 561 562 PROC_LOCK(p); 563 thread_cow_get_proc(td, p); 564 PROC_UNLOCK(p); 565 566 /* Initialize resource accounting structures. */ 567 racct_create(&p->p_racct); 568 569 p->p_stats = pstats_alloc(); 570 571 /* Allocate a prototype map so we have something to fork. */ 572 p->p_vmspace = &vmspace0; 573 vmspace0.vm_refcnt = 1; 574 pmap_pinit0(vmspace_pmap(&vmspace0)); 575 576 /* 577 * proc0 is not expected to enter usermode, so there is no special 578 * handling for sv_minuser here, like is done for exec_new_vmspace(). 579 */ 580 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 581 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 582 583 /* 584 * Call the init and ctor for the new thread and proc. We wait 585 * to do this until all other structures are fairly sane. 586 */ 587 EVENTHANDLER_INVOKE(process_init, p); 588 EVENTHANDLER_INVOKE(thread_init, td); 589 EVENTHANDLER_INVOKE(process_ctor, p); 590 EVENTHANDLER_INVOKE(thread_ctor, td); 591 592 /* 593 * Charge root for one process. 594 */ 595 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 596 PROC_LOCK(p); 597 racct_add_force(p, RACCT_NPROC, 1); 598 PROC_UNLOCK(p); 599 } 600 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 601 602 /* ARGSUSED*/ 603 static void 604 proc0_post(void *dummy __unused) 605 { 606 struct timespec ts; 607 struct proc *p; 608 struct rusage ru; 609 struct thread *td; 610 611 /* 612 * Now we can look at the time, having had a chance to verify the 613 * time from the filesystem. Pretend that proc0 started now. 614 */ 615 sx_slock(&allproc_lock); 616 FOREACH_PROC_IN_SYSTEM(p) { 617 microuptime(&p->p_stats->p_start); 618 PROC_STATLOCK(p); 619 rufetch(p, &ru); /* Clears thread stats */ 620 PROC_STATUNLOCK(p); 621 p->p_rux.rux_runtime = 0; 622 p->p_rux.rux_uticks = 0; 623 p->p_rux.rux_sticks = 0; 624 p->p_rux.rux_iticks = 0; 625 FOREACH_THREAD_IN_PROC(p, td) { 626 td->td_runtime = 0; 627 } 628 } 629 sx_sunlock(&allproc_lock); 630 PCPU_SET(switchtime, cpu_ticks()); 631 PCPU_SET(switchticks, ticks); 632 633 /* 634 * Give the ``random'' number generator a thump. 635 */ 636 nanotime(&ts); 637 srandom(ts.tv_sec ^ ts.tv_nsec); 638 } 639 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 640 641 static void 642 random_init(void *dummy __unused) 643 { 644 645 /* 646 * After CPU has been started we have some randomness on most 647 * platforms via get_cyclecount(). For platforms that don't 648 * we will reseed random(9) in proc0_post() as well. 649 */ 650 srandom(get_cyclecount()); 651 } 652 SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL); 653 654 /* 655 *************************************************************************** 656 **** 657 **** The following SYSINIT's and glue code should be moved to the 658 **** respective files on a per subsystem basis. 659 **** 660 *************************************************************************** 661 */ 662 663 664 /* 665 *************************************************************************** 666 **** 667 **** The following code probably belongs in another file, like 668 **** kern/init_init.c. 669 **** 670 *************************************************************************** 671 */ 672 673 /* 674 * List of paths to try when searching for "init". 675 */ 676 static char init_path[MAXPATHLEN] = 677 #ifdef INIT_PATH 678 __XSTRING(INIT_PATH); 679 #else 680 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 681 #endif 682 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 683 "Path used to search the init process"); 684 685 /* 686 * Shutdown timeout of init(8). 687 * Unused within kernel, but used to control init(8), hence do not remove. 688 */ 689 #ifndef INIT_SHUTDOWN_TIMEOUT 690 #define INIT_SHUTDOWN_TIMEOUT 120 691 #endif 692 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 693 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 694 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 695 "Unused within kernel, but used to control init(8)"); 696 697 /* 698 * Start the initial user process; try exec'ing each pathname in init_path. 699 * The program is invoked with one argument containing the boot flags. 700 */ 701 static void 702 start_init(void *dummy) 703 { 704 vm_offset_t addr; 705 struct execve_args args; 706 int options, error; 707 char *var, *path, *next, *s; 708 char *ucp, **uap, *arg0, *arg1; 709 struct thread *td; 710 struct proc *p; 711 712 mtx_lock(&Giant); 713 714 GIANT_REQUIRED; 715 716 td = curthread; 717 p = td->td_proc; 718 719 vfs_mountroot(); 720 721 /* Wipe GELI passphrase from the environment. */ 722 kern_unsetenv("kern.geom.eli.passphrase"); 723 724 /* 725 * Need just enough stack to hold the faked-up "execve()" arguments. 726 */ 727 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 728 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 0, 729 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 730 panic("init: couldn't allocate argument space"); 731 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 732 p->p_vmspace->vm_ssize = 1; 733 734 if ((var = kern_getenv("init_path")) != NULL) { 735 strlcpy(init_path, var, sizeof(init_path)); 736 freeenv(var); 737 } 738 739 for (path = init_path; *path != '\0'; path = next) { 740 while (*path == ':') 741 path++; 742 if (*path == '\0') 743 break; 744 for (next = path; *next != '\0' && *next != ':'; next++) 745 /* nothing */ ; 746 if (bootverbose) 747 printf("start_init: trying %.*s\n", (int)(next - path), 748 path); 749 750 /* 751 * Move out the boot flag argument. 752 */ 753 options = 0; 754 ucp = (char *)p->p_sysent->sv_usrstack; 755 (void)subyte(--ucp, 0); /* trailing zero */ 756 if (boothowto & RB_SINGLE) { 757 (void)subyte(--ucp, 's'); 758 options = 1; 759 } 760 #ifdef notyet 761 if (boothowto & RB_FASTBOOT) { 762 (void)subyte(--ucp, 'f'); 763 options = 1; 764 } 765 #endif 766 767 #ifdef BOOTCDROM 768 (void)subyte(--ucp, 'C'); 769 options = 1; 770 #endif 771 772 if (options == 0) 773 (void)subyte(--ucp, '-'); 774 (void)subyte(--ucp, '-'); /* leading hyphen */ 775 arg1 = ucp; 776 777 /* 778 * Move out the file name (also arg 0). 779 */ 780 (void)subyte(--ucp, 0); 781 for (s = next - 1; s >= path; s--) 782 (void)subyte(--ucp, *s); 783 arg0 = ucp; 784 785 /* 786 * Move out the arg pointers. 787 */ 788 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 789 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 790 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 791 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 792 793 /* 794 * Point at the arguments. 795 */ 796 args.fname = arg0; 797 args.argv = uap; 798 args.envv = NULL; 799 800 /* 801 * Now try to exec the program. If can't for any reason 802 * other than it doesn't exist, complain. 803 * 804 * Otherwise, return via fork_trampoline() all the way 805 * to user mode as init! 806 */ 807 if ((error = sys_execve(td, &args)) == 0) { 808 mtx_unlock(&Giant); 809 return; 810 } 811 if (error != ENOENT) 812 printf("exec %.*s: error %d\n", (int)(next - path), 813 path, error); 814 } 815 printf("init: not found in path %s\n", init_path); 816 panic("no init"); 817 } 818 819 /* 820 * Like kproc_create(), but runs in it's own address space. 821 * We do this early to reserve pid 1. 822 * 823 * Note special case - do not make it runnable yet. Other work 824 * in progress will change this more. 825 */ 826 static void 827 create_init(const void *udata __unused) 828 { 829 struct ucred *newcred, *oldcred; 830 struct thread *td; 831 int error; 832 833 error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc, 834 NULL, 0, NULL); 835 if (error) 836 panic("cannot fork init: %d\n", error); 837 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 838 /* divorce init's credentials from the kernel's */ 839 newcred = crget(); 840 sx_xlock(&proctree_lock); 841 PROC_LOCK(initproc); 842 initproc->p_flag |= P_SYSTEM | P_INMEM; 843 initproc->p_treeflag |= P_TREE_REAPER; 844 LIST_INSERT_HEAD(&initproc->p_reaplist, &proc0, p_reapsibling); 845 oldcred = initproc->p_ucred; 846 crcopy(newcred, oldcred); 847 #ifdef MAC 848 mac_cred_create_init(newcred); 849 #endif 850 #ifdef AUDIT 851 audit_cred_proc1(newcred); 852 #endif 853 proc_set_cred(initproc, newcred); 854 td = FIRST_THREAD_IN_PROC(initproc); 855 crfree(td->td_ucred); 856 td->td_ucred = crhold(initproc->p_ucred); 857 PROC_UNLOCK(initproc); 858 sx_xunlock(&proctree_lock); 859 crfree(oldcred); 860 cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL); 861 } 862 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 863 864 /* 865 * Make it runnable now. 866 */ 867 static void 868 kick_init(const void *udata __unused) 869 { 870 struct thread *td; 871 872 td = FIRST_THREAD_IN_PROC(initproc); 873 thread_lock(td); 874 TD_SET_CAN_RUN(td); 875 sched_add(td, SRQ_BORING); 876 thread_unlock(td); 877 } 878 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 879