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 thread0_storage thread0_st __aligned(32); 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 #ifdef INVARIANTS 121 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 122 #endif 123 124 /* 125 * This ensures that there is at least one entry so that the sysinit_set 126 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 127 * executed. 128 */ 129 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 130 131 /* 132 * The sysinit table itself. Items are checked off as the are run. 133 * If we want to register new sysinit types, add them to newsysinit. 134 */ 135 SET_DECLARE(sysinit_set, struct sysinit); 136 struct sysinit **sysinit, **sysinit_end; 137 struct sysinit **newsysinit, **newsysinit_end; 138 139 EVENTHANDLER_LIST_DECLARE(process_init); 140 EVENTHANDLER_LIST_DECLARE(thread_init); 141 EVENTHANDLER_LIST_DECLARE(process_ctor); 142 EVENTHANDLER_LIST_DECLARE(thread_ctor); 143 144 /* 145 * Merge a new sysinit set into the current set, reallocating it if 146 * necessary. This can only be called after malloc is running. 147 */ 148 void 149 sysinit_add(struct sysinit **set, struct sysinit **set_end) 150 { 151 struct sysinit **newset; 152 struct sysinit **sipp; 153 struct sysinit **xipp; 154 int count; 155 156 count = set_end - set; 157 if (newsysinit) 158 count += newsysinit_end - newsysinit; 159 else 160 count += sysinit_end - sysinit; 161 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 162 if (newset == NULL) 163 panic("cannot malloc for sysinit"); 164 xipp = newset; 165 if (newsysinit) 166 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 167 *xipp++ = *sipp; 168 else 169 for (sipp = sysinit; sipp < sysinit_end; sipp++) 170 *xipp++ = *sipp; 171 for (sipp = set; sipp < set_end; sipp++) 172 *xipp++ = *sipp; 173 if (newsysinit) 174 free(newsysinit, M_TEMP); 175 newsysinit = newset; 176 newsysinit_end = newset + count; 177 } 178 179 #if defined (DDB) && defined(VERBOSE_SYSINIT) 180 static const char * 181 symbol_name(vm_offset_t va, db_strategy_t strategy) 182 { 183 const char *name; 184 c_db_sym_t sym; 185 db_expr_t offset; 186 187 if (va == 0) 188 return (NULL); 189 sym = db_search_symbol(va, strategy, &offset); 190 if (offset != 0) 191 return (NULL); 192 db_symbol_values(sym, &name, NULL); 193 return (name); 194 } 195 #endif 196 197 /* 198 * System startup; initialize the world, create process 0, mount root 199 * filesystem, and fork to create init and pagedaemon. Most of the 200 * hard work is done in the lower-level initialization routines including 201 * startup(), which does memory initialization and autoconfiguration. 202 * 203 * This allows simple addition of new kernel subsystems that require 204 * boot time initialization. It also allows substitution of subsystem 205 * (for instance, a scheduler, kernel profiler, or VM system) by object 206 * module. Finally, it allows for optional "kernel threads". 207 */ 208 void 209 mi_startup(void) 210 { 211 212 struct sysinit **sipp; /* system initialization*/ 213 struct sysinit **xipp; /* interior loop of sort*/ 214 struct sysinit *save; /* bubble*/ 215 216 #if defined(VERBOSE_SYSINIT) 217 int last; 218 int verbose; 219 #endif 220 221 if (boothowto & RB_VERBOSE) 222 bootverbose++; 223 224 if (sysinit == NULL) { 225 sysinit = SET_BEGIN(sysinit_set); 226 sysinit_end = SET_LIMIT(sysinit_set); 227 } 228 229 restart: 230 /* 231 * Perform a bubble sort of the system initialization objects by 232 * their subsystem (primary key) and order (secondary key). 233 */ 234 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 235 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 236 if ((*sipp)->subsystem < (*xipp)->subsystem || 237 ((*sipp)->subsystem == (*xipp)->subsystem && 238 (*sipp)->order <= (*xipp)->order)) 239 continue; /* skip*/ 240 save = *sipp; 241 *sipp = *xipp; 242 *xipp = save; 243 } 244 } 245 246 #if defined(VERBOSE_SYSINIT) 247 last = SI_SUB_COPYRIGHT; 248 verbose = 0; 249 #if !defined(DDB) 250 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 251 #endif 252 #endif 253 254 /* 255 * Traverse the (now) ordered list of system initialization tasks. 256 * Perform each task, and continue on to the next task. 257 */ 258 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 259 260 if ((*sipp)->subsystem == SI_SUB_DUMMY) 261 continue; /* skip dummy task(s)*/ 262 263 if ((*sipp)->subsystem == SI_SUB_DONE) 264 continue; 265 266 #if defined(VERBOSE_SYSINIT) 267 if ((*sipp)->subsystem > last) { 268 verbose = 1; 269 last = (*sipp)->subsystem; 270 printf("subsystem %x\n", last); 271 } 272 if (verbose) { 273 #if defined(DDB) 274 const char *func, *data; 275 276 func = symbol_name((vm_offset_t)(*sipp)->func, 277 DB_STGY_PROC); 278 data = symbol_name((vm_offset_t)(*sipp)->udata, 279 DB_STGY_ANY); 280 if (func != NULL && data != NULL) 281 printf(" %s(&%s)... ", func, data); 282 else if (func != NULL) 283 printf(" %s(%p)... ", func, (*sipp)->udata); 284 else 285 #endif 286 printf(" %p(%p)... ", (*sipp)->func, 287 (*sipp)->udata); 288 } 289 #endif 290 291 /* Call function */ 292 (*((*sipp)->func))((*sipp)->udata); 293 294 #if defined(VERBOSE_SYSINIT) 295 if (verbose) 296 printf("done.\n"); 297 #endif 298 299 /* Check off the one we're just done */ 300 (*sipp)->subsystem = SI_SUB_DONE; 301 302 /* Check if we've installed more sysinit items via KLD */ 303 if (newsysinit != NULL) { 304 if (sysinit != SET_BEGIN(sysinit_set)) 305 free(sysinit, M_TEMP); 306 sysinit = newsysinit; 307 sysinit_end = newsysinit_end; 308 newsysinit = NULL; 309 newsysinit_end = NULL; 310 goto restart; 311 } 312 } 313 314 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 315 mtx_unlock(&Giant); 316 317 /* 318 * Now hand over this thread to swapper. 319 */ 320 swapper(); 321 /* NOTREACHED*/ 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 { 370 371 panic("null_fetch_syscall_args"); 372 } 373 374 static void 375 null_set_syscall_retval(struct thread *td __unused, int error __unused) 376 { 377 378 panic("null_set_syscall_retval"); 379 } 380 381 struct sysentvec null_sysvec = { 382 .sv_size = 0, 383 .sv_table = NULL, 384 .sv_mask = 0, 385 .sv_errsize = 0, 386 .sv_errtbl = NULL, 387 .sv_transtrap = NULL, 388 .sv_fixup = NULL, 389 .sv_sendsig = NULL, 390 .sv_sigcode = NULL, 391 .sv_szsigcode = NULL, 392 .sv_name = "null", 393 .sv_coredump = NULL, 394 .sv_imgact_try = NULL, 395 .sv_minsigstksz = 0, 396 .sv_pagesize = PAGE_SIZE, 397 .sv_minuser = VM_MIN_ADDRESS, 398 .sv_maxuser = VM_MAXUSER_ADDRESS, 399 .sv_usrstack = USRSTACK, 400 .sv_psstrings = PS_STRINGS, 401 .sv_stackprot = VM_PROT_ALL, 402 .sv_copyout_strings = NULL, 403 .sv_setregs = NULL, 404 .sv_fixlimit = NULL, 405 .sv_maxssiz = NULL, 406 .sv_flags = 0, 407 .sv_set_syscall_retval = null_set_syscall_retval, 408 .sv_fetch_syscall_args = null_fetch_syscall_args, 409 .sv_syscallnames = NULL, 410 .sv_schedtail = NULL, 411 .sv_thread_detach = NULL, 412 .sv_trap = NULL, 413 }; 414 415 /* 416 * The two following SYSINIT's are proc0 specific glue code. I am not 417 * convinced that they can not be safely combined, but their order of 418 * operation has been maintained as the same as the original init_main.c 419 * for right now. 420 */ 421 /* ARGSUSED*/ 422 static void 423 proc0_init(void *dummy __unused) 424 { 425 struct proc *p; 426 struct thread *td; 427 struct ucred *newcred; 428 struct uidinfo tmpuinfo; 429 struct loginclass tmplc = { 430 .lc_name = "", 431 }; 432 vm_paddr_t pageablemem; 433 int i; 434 435 GIANT_REQUIRED; 436 p = &proc0; 437 td = &thread0; 438 439 /* 440 * Initialize magic number and osrel. 441 */ 442 p->p_magic = P_MAGIC; 443 p->p_osrel = osreldate; 444 445 /* 446 * Initialize thread and process structures. 447 */ 448 procinit(); /* set up proc zone */ 449 threadinit(); /* set up UMA zones */ 450 451 /* 452 * Initialise scheduler resources. 453 * Add scheduler specific parts to proc, thread as needed. 454 */ 455 schedinit(); /* scheduler gets its house in order */ 456 457 /* 458 * Create process 0 (the swapper). 459 */ 460 LIST_INSERT_HEAD(&allproc, p, p_list); 461 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 462 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 463 p->p_pgrp = &pgrp0; 464 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 465 LIST_INIT(&pgrp0.pg_members); 466 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 467 468 pgrp0.pg_session = &session0; 469 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 470 refcount_init(&session0.s_count, 1); 471 session0.s_leader = p; 472 473 p->p_sysent = &null_sysvec; 474 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 475 p->p_flag2 = 0; 476 p->p_state = PRS_NORMAL; 477 p->p_klist = knlist_alloc(&p->p_mtx); 478 STAILQ_INIT(&p->p_ktr); 479 p->p_nice = NZERO; 480 /* pid_max cannot be greater than PID_MAX */ 481 td->td_tid = PID_MAX + 1; 482 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash); 483 td->td_state = TDS_RUNNING; 484 td->td_pri_class = PRI_TIMESHARE; 485 td->td_user_pri = PUSER; 486 td->td_base_user_pri = PUSER; 487 td->td_lend_user_pri = PRI_MAX; 488 td->td_priority = PVM; 489 td->td_base_pri = PVM; 490 td->td_oncpu = curcpu; 491 td->td_flags = TDF_INMEM; 492 td->td_pflags = TDP_KTHREAD; 493 td->td_cpuset = cpuset_thread0(); 494 vm_domain_policy_init(&td->td_vm_dom_policy); 495 vm_domain_policy_set(&td->td_vm_dom_policy, VM_POLICY_NONE, -1); 496 vm_domain_policy_init(&p->p_vm_dom_policy); 497 vm_domain_policy_set(&p->p_vm_dom_policy, VM_POLICY_NONE, -1); 498 prison0_init(); 499 p->p_peers = 0; 500 p->p_leader = p; 501 p->p_reaper = p; 502 LIST_INIT(&p->p_reaplist); 503 504 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 505 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 506 507 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 508 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 509 callout_init(&td->td_slpcallout, 1); 510 511 /* Create credentials. */ 512 newcred = crget(); 513 newcred->cr_ngroups = 1; /* group 0 */ 514 /* A hack to prevent uifind from tripping over NULL pointers. */ 515 curthread->td_ucred = newcred; 516 tmpuinfo.ui_uid = 1; 517 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 518 newcred->cr_uidinfo = uifind(0); 519 newcred->cr_ruidinfo = uifind(0); 520 newcred->cr_loginclass = &tmplc; 521 newcred->cr_loginclass = loginclass_find("default"); 522 /* End hack. creds get properly set later with thread_cow_get_proc */ 523 curthread->td_ucred = NULL; 524 newcred->cr_prison = &prison0; 525 proc_set_cred_init(p, newcred); 526 #ifdef AUDIT 527 audit_cred_kproc0(newcred); 528 #endif 529 #ifdef MAC 530 mac_cred_create_swapper(newcred); 531 #endif 532 /* Create sigacts. */ 533 p->p_sigacts = sigacts_alloc(); 534 535 /* Initialize signal state for process 0. */ 536 siginit(&proc0); 537 538 /* Create the file descriptor table. */ 539 p->p_fd = fdinit(NULL, false); 540 p->p_fdtol = NULL; 541 542 /* Create the limits structures. */ 543 p->p_limit = lim_alloc(); 544 for (i = 0; i < RLIM_NLIMITS; i++) 545 p->p_limit->pl_rlimit[i].rlim_cur = 546 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 547 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 548 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 549 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 550 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 551 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 552 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 553 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 554 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 555 /* Cast to avoid overflow on i386/PAE. */ 556 pageablemem = ptoa((vm_paddr_t)vm_cnt.v_free_count); 557 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 558 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 559 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 560 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 561 p->p_cpulimit = RLIM_INFINITY; 562 563 PROC_LOCK(p); 564 thread_cow_get_proc(td, p); 565 PROC_UNLOCK(p); 566 567 /* Initialize resource accounting structures. */ 568 racct_create(&p->p_racct); 569 570 p->p_stats = pstats_alloc(); 571 572 /* Allocate a prototype map so we have something to fork. */ 573 p->p_vmspace = &vmspace0; 574 vmspace0.vm_refcnt = 1; 575 pmap_pinit0(vmspace_pmap(&vmspace0)); 576 577 /* 578 * proc0 is not expected to enter usermode, so there is no special 579 * handling for sv_minuser here, like is done for exec_new_vmspace(). 580 */ 581 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 582 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 583 584 /* 585 * Call the init and ctor for the new thread and proc. We wait 586 * to do this until all other structures are fairly sane. 587 */ 588 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 589 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 590 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 591 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 592 593 /* 594 * Charge root for one process. 595 */ 596 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 597 PROC_LOCK(p); 598 racct_add_force(p, RACCT_NPROC, 1); 599 PROC_UNLOCK(p); 600 } 601 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 602 603 /* ARGSUSED*/ 604 static void 605 proc0_post(void *dummy __unused) 606 { 607 struct timespec ts; 608 struct proc *p; 609 struct rusage ru; 610 struct thread *td; 611 612 /* 613 * Now we can look at the time, having had a chance to verify the 614 * time from the filesystem. Pretend that proc0 started now. 615 */ 616 sx_slock(&allproc_lock); 617 FOREACH_PROC_IN_SYSTEM(p) { 618 microuptime(&p->p_stats->p_start); 619 PROC_STATLOCK(p); 620 rufetch(p, &ru); /* Clears thread stats */ 621 PROC_STATUNLOCK(p); 622 p->p_rux.rux_runtime = 0; 623 p->p_rux.rux_uticks = 0; 624 p->p_rux.rux_sticks = 0; 625 p->p_rux.rux_iticks = 0; 626 FOREACH_THREAD_IN_PROC(p, td) { 627 td->td_runtime = 0; 628 } 629 } 630 sx_sunlock(&allproc_lock); 631 PCPU_SET(switchtime, cpu_ticks()); 632 PCPU_SET(switchticks, ticks); 633 634 /* 635 * Give the ``random'' number generator a thump. 636 */ 637 nanotime(&ts); 638 srandom(ts.tv_sec ^ ts.tv_nsec); 639 } 640 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 641 642 static void 643 random_init(void *dummy __unused) 644 { 645 646 /* 647 * After CPU has been started we have some randomness on most 648 * platforms via get_cyclecount(). For platforms that don't 649 * we will reseed random(9) in proc0_post() as well. 650 */ 651 srandom(get_cyclecount()); 652 } 653 SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL); 654 655 /* 656 *************************************************************************** 657 **** 658 **** The following SYSINIT's and glue code should be moved to the 659 **** respective files on a per subsystem basis. 660 **** 661 *************************************************************************** 662 */ 663 664 /* 665 * List of paths to try when searching for "init". 666 */ 667 static char init_path[MAXPATHLEN] = 668 #ifdef INIT_PATH 669 __XSTRING(INIT_PATH); 670 #else 671 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 672 #endif 673 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 674 "Path used to search the init process"); 675 676 /* 677 * Shutdown timeout of init(8). 678 * Unused within kernel, but used to control init(8), hence do not remove. 679 */ 680 #ifndef INIT_SHUTDOWN_TIMEOUT 681 #define INIT_SHUTDOWN_TIMEOUT 120 682 #endif 683 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 684 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 685 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 686 "Unused within kernel, but used to control init(8)"); 687 688 /* 689 * Start the initial user process; try exec'ing each pathname in init_path. 690 * The program is invoked with one argument containing the boot flags. 691 */ 692 static void 693 start_init(void *dummy) 694 { 695 vm_offset_t addr; 696 struct execve_args args; 697 int options, error; 698 char *var, *path, *next, *s; 699 char *ucp, **uap, *arg0, *arg1; 700 struct thread *td; 701 struct proc *p; 702 703 mtx_lock(&Giant); 704 705 GIANT_REQUIRED; 706 707 td = curthread; 708 p = td->td_proc; 709 710 vfs_mountroot(); 711 712 /* Wipe GELI passphrase from the environment. */ 713 kern_unsetenv("kern.geom.eli.passphrase"); 714 715 /* 716 * Need just enough stack to hold the faked-up "execve()" arguments. 717 */ 718 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 719 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 0, 720 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 721 panic("init: couldn't allocate argument space"); 722 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 723 p->p_vmspace->vm_ssize = 1; 724 725 if ((var = kern_getenv("init_path")) != NULL) { 726 strlcpy(init_path, var, sizeof(init_path)); 727 freeenv(var); 728 } 729 730 for (path = init_path; *path != '\0'; path = next) { 731 while (*path == ':') 732 path++; 733 if (*path == '\0') 734 break; 735 for (next = path; *next != '\0' && *next != ':'; next++) 736 /* nothing */ ; 737 if (bootverbose) 738 printf("start_init: trying %.*s\n", (int)(next - path), 739 path); 740 741 /* 742 * Move out the boot flag argument. 743 */ 744 options = 0; 745 ucp = (char *)p->p_sysent->sv_usrstack; 746 (void)subyte(--ucp, 0); /* trailing zero */ 747 if (boothowto & RB_SINGLE) { 748 (void)subyte(--ucp, 's'); 749 options = 1; 750 } 751 #ifdef notyet 752 if (boothowto & RB_FASTBOOT) { 753 (void)subyte(--ucp, 'f'); 754 options = 1; 755 } 756 #endif 757 758 #ifdef BOOTCDROM 759 (void)subyte(--ucp, 'C'); 760 options = 1; 761 #endif 762 763 if (options == 0) 764 (void)subyte(--ucp, '-'); 765 (void)subyte(--ucp, '-'); /* leading hyphen */ 766 arg1 = ucp; 767 768 /* 769 * Move out the file name (also arg 0). 770 */ 771 (void)subyte(--ucp, 0); 772 for (s = next - 1; s >= path; s--) 773 (void)subyte(--ucp, *s); 774 arg0 = ucp; 775 776 /* 777 * Move out the arg pointers. 778 */ 779 uap = (char **)rounddown2((intptr_t)ucp, sizeof(intptr_t)); 780 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 781 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 782 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 783 784 /* 785 * Point at the arguments. 786 */ 787 args.fname = arg0; 788 args.argv = uap; 789 args.envv = NULL; 790 791 /* 792 * Now try to exec the program. If can't for any reason 793 * other than it doesn't exist, complain. 794 * 795 * Otherwise, return via fork_trampoline() all the way 796 * to user mode as init! 797 */ 798 if ((error = sys_execve(td, &args)) == 0) { 799 mtx_unlock(&Giant); 800 return; 801 } 802 if (error != ENOENT) 803 printf("exec %.*s: error %d\n", (int)(next - path), 804 path, error); 805 } 806 printf("init: not found in path %s\n", init_path); 807 panic("no init"); 808 } 809 810 /* 811 * Like kproc_create(), but runs in its own address space. 812 * We do this early to reserve pid 1. 813 * 814 * Note special case - do not make it runnable yet. Other work 815 * in progress will change this more. 816 */ 817 static void 818 create_init(const void *udata __unused) 819 { 820 struct fork_req fr; 821 struct ucred *newcred, *oldcred; 822 struct thread *td; 823 int error; 824 825 bzero(&fr, sizeof(fr)); 826 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 827 fr.fr_procp = &initproc; 828 error = fork1(&thread0, &fr); 829 if (error) 830 panic("cannot fork init: %d\n", error); 831 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 832 /* divorce init's credentials from the kernel's */ 833 newcred = crget(); 834 sx_xlock(&proctree_lock); 835 PROC_LOCK(initproc); 836 initproc->p_flag |= P_SYSTEM | P_INMEM; 837 initproc->p_treeflag |= P_TREE_REAPER; 838 LIST_INSERT_HEAD(&initproc->p_reaplist, &proc0, p_reapsibling); 839 oldcred = initproc->p_ucred; 840 crcopy(newcred, oldcred); 841 #ifdef MAC 842 mac_cred_create_init(newcred); 843 #endif 844 #ifdef AUDIT 845 audit_cred_proc1(newcred); 846 #endif 847 proc_set_cred(initproc, newcred); 848 td = FIRST_THREAD_IN_PROC(initproc); 849 crfree(td->td_ucred); 850 td->td_ucred = crhold(initproc->p_ucred); 851 PROC_UNLOCK(initproc); 852 sx_xunlock(&proctree_lock); 853 crfree(oldcred); 854 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 855 start_init, NULL); 856 } 857 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 858 859 /* 860 * Make it runnable now. 861 */ 862 static void 863 kick_init(const void *udata __unused) 864 { 865 struct thread *td; 866 867 td = FIRST_THREAD_IN_PROC(initproc); 868 thread_lock(td); 869 TD_SET_CAN_RUN(td); 870 sched_add(td, SRQ_BORING); 871 thread_unlock(td); 872 } 873 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 874