1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1995 Terrence R. Lambert 5 * All rights reserved. 6 * 7 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * (c) UNIX System Laboratories, Inc. 10 * All or some portions of this file are derived from material licensed 11 * to the University of California by American Telephone and Telegraph 12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 13 * the permission of UNIX System Laboratories, Inc. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 * 43 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 44 */ 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include "opt_ddb.h" 50 #include "opt_init_path.h" 51 #include "opt_verbose_sysinit.h" 52 53 #include <sys/param.h> 54 #include <sys/kernel.h> 55 #include <sys/epoch.h> 56 #include <sys/exec.h> 57 #include <sys/file.h> 58 #include <sys/filedesc.h> 59 #include <sys/jail.h> 60 #include <sys/ktr.h> 61 #include <sys/lock.h> 62 #include <sys/loginclass.h> 63 #include <sys/mount.h> 64 #include <sys/mutex.h> 65 #include <sys/syscallsubr.h> 66 #include <sys/sysctl.h> 67 #include <sys/proc.h> 68 #include <sys/racct.h> 69 #include <sys/resourcevar.h> 70 #include <sys/systm.h> 71 #include <sys/signalvar.h> 72 #include <sys/vnode.h> 73 #include <sys/sysent.h> 74 #include <sys/reboot.h> 75 #include <sys/sched.h> 76 #include <sys/sx.h> 77 #include <sys/sysproto.h> 78 #include <sys/vmmeter.h> 79 #include <sys/unistd.h> 80 #include <sys/malloc.h> 81 #include <sys/conf.h> 82 #include <sys/cpuset.h> 83 84 #include <machine/cpu.h> 85 86 #include <security/audit/audit.h> 87 #include <security/mac/mac_framework.h> 88 89 #include <vm/vm.h> 90 #include <vm/vm_param.h> 91 #include <vm/vm_extern.h> 92 #include <vm/pmap.h> 93 #include <vm/vm_map.h> 94 #include <sys/copyright.h> 95 96 #include <ddb/ddb.h> 97 #include <ddb/db_sym.h> 98 99 void mi_startup(void); /* Should be elsewhere */ 100 101 /* Components of the first process -- never freed. */ 102 static struct session session0; 103 static struct pgrp pgrp0; 104 struct proc proc0; 105 struct thread0_storage thread0_st __aligned(32); 106 struct vmspace vmspace0; 107 struct proc *initproc; 108 109 #ifndef BOOTHOWTO 110 #define BOOTHOWTO 0 111 #endif 112 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 113 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 114 "Boot control flags, passed from loader"); 115 116 #ifndef BOOTVERBOSE 117 #define BOOTVERBOSE 0 118 #endif 119 int bootverbose = BOOTVERBOSE; 120 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 121 "Control the output of verbose kernel messages"); 122 123 #ifdef VERBOSE_SYSINIT 124 /* 125 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 126 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 127 * option and associated tunable are: 128 * - 0, 'compiled in but silent by default' 129 * - 1, 'compiled in but verbose by default' (default) 130 */ 131 int verbose_sysinit = VERBOSE_SYSINIT; 132 TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 133 #endif 134 135 #ifdef INVARIANTS 136 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 137 #endif 138 139 /* 140 * This ensures that there is at least one entry so that the sysinit_set 141 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 142 * executed. 143 */ 144 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 145 146 /* 147 * The sysinit table itself. Items are checked off as the are run. 148 * If we want to register new sysinit types, add them to newsysinit. 149 */ 150 SET_DECLARE(sysinit_set, struct sysinit); 151 struct sysinit **sysinit, **sysinit_end; 152 struct sysinit **newsysinit, **newsysinit_end; 153 154 EVENTHANDLER_LIST_DECLARE(process_init); 155 EVENTHANDLER_LIST_DECLARE(thread_init); 156 EVENTHANDLER_LIST_DECLARE(process_ctor); 157 EVENTHANDLER_LIST_DECLARE(thread_ctor); 158 159 /* 160 * Merge a new sysinit set into the current set, reallocating it if 161 * necessary. This can only be called after malloc is running. 162 */ 163 void 164 sysinit_add(struct sysinit **set, struct sysinit **set_end) 165 { 166 struct sysinit **newset; 167 struct sysinit **sipp; 168 struct sysinit **xipp; 169 int count; 170 171 count = set_end - set; 172 if (newsysinit) 173 count += newsysinit_end - newsysinit; 174 else 175 count += sysinit_end - sysinit; 176 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 177 if (newset == NULL) 178 panic("cannot malloc for sysinit"); 179 xipp = newset; 180 if (newsysinit) 181 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 182 *xipp++ = *sipp; 183 else 184 for (sipp = sysinit; sipp < sysinit_end; sipp++) 185 *xipp++ = *sipp; 186 for (sipp = set; sipp < set_end; sipp++) 187 *xipp++ = *sipp; 188 if (newsysinit) 189 free(newsysinit, M_TEMP); 190 newsysinit = newset; 191 newsysinit_end = newset + count; 192 } 193 194 #if defined (DDB) && defined(VERBOSE_SYSINIT) 195 static const char * 196 symbol_name(vm_offset_t va, db_strategy_t strategy) 197 { 198 const char *name; 199 c_db_sym_t sym; 200 db_expr_t offset; 201 202 if (va == 0) 203 return (NULL); 204 sym = db_search_symbol(va, strategy, &offset); 205 if (offset != 0) 206 return (NULL); 207 db_symbol_values(sym, &name, NULL); 208 return (name); 209 } 210 #endif 211 212 /* 213 * System startup; initialize the world, create process 0, mount root 214 * filesystem, and fork to create init and pagedaemon. Most of the 215 * hard work is done in the lower-level initialization routines including 216 * startup(), which does memory initialization and autoconfiguration. 217 * 218 * This allows simple addition of new kernel subsystems that require 219 * boot time initialization. It also allows substitution of subsystem 220 * (for instance, a scheduler, kernel profiler, or VM system) by object 221 * module. Finally, it allows for optional "kernel threads". 222 */ 223 void 224 mi_startup(void) 225 { 226 227 struct sysinit **sipp; /* system initialization*/ 228 struct sysinit **xipp; /* interior loop of sort*/ 229 struct sysinit *save; /* bubble*/ 230 231 #if defined(VERBOSE_SYSINIT) 232 int last; 233 int verbose; 234 #endif 235 236 TSENTER(); 237 238 if (boothowto & RB_VERBOSE) 239 bootverbose++; 240 241 if (sysinit == NULL) { 242 sysinit = SET_BEGIN(sysinit_set); 243 sysinit_end = SET_LIMIT(sysinit_set); 244 } 245 246 restart: 247 /* 248 * Perform a bubble sort of the system initialization objects by 249 * their subsystem (primary key) and order (secondary key). 250 */ 251 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 252 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 253 if ((*sipp)->subsystem < (*xipp)->subsystem || 254 ((*sipp)->subsystem == (*xipp)->subsystem && 255 (*sipp)->order <= (*xipp)->order)) 256 continue; /* skip*/ 257 save = *sipp; 258 *sipp = *xipp; 259 *xipp = save; 260 } 261 } 262 263 #if defined(VERBOSE_SYSINIT) 264 last = SI_SUB_COPYRIGHT; 265 verbose = 0; 266 #if !defined(DDB) 267 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 268 #endif 269 #endif 270 271 /* 272 * Traverse the (now) ordered list of system initialization tasks. 273 * Perform each task, and continue on to the next task. 274 */ 275 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 276 277 if ((*sipp)->subsystem == SI_SUB_DUMMY) 278 continue; /* skip dummy task(s)*/ 279 280 if ((*sipp)->subsystem == SI_SUB_DONE) 281 continue; 282 283 #if defined(VERBOSE_SYSINIT) 284 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 285 verbose = 1; 286 last = (*sipp)->subsystem; 287 printf("subsystem %x\n", last); 288 } 289 if (verbose) { 290 #if defined(DDB) 291 const char *func, *data; 292 293 func = symbol_name((vm_offset_t)(*sipp)->func, 294 DB_STGY_PROC); 295 data = symbol_name((vm_offset_t)(*sipp)->udata, 296 DB_STGY_ANY); 297 if (func != NULL && data != NULL) 298 printf(" %s(&%s)... ", func, data); 299 else if (func != NULL) 300 printf(" %s(%p)... ", func, (*sipp)->udata); 301 else 302 #endif 303 printf(" %p(%p)... ", (*sipp)->func, 304 (*sipp)->udata); 305 } 306 #endif 307 308 /* Call function */ 309 (*((*sipp)->func))((*sipp)->udata); 310 311 #if defined(VERBOSE_SYSINIT) 312 if (verbose) 313 printf("done.\n"); 314 #endif 315 316 /* Check off the one we're just done */ 317 (*sipp)->subsystem = SI_SUB_DONE; 318 319 /* Check if we've installed more sysinit items via KLD */ 320 if (newsysinit != NULL) { 321 if (sysinit != SET_BEGIN(sysinit_set)) 322 free(sysinit, M_TEMP); 323 sysinit = newsysinit; 324 sysinit_end = newsysinit_end; 325 newsysinit = NULL; 326 newsysinit_end = NULL; 327 goto restart; 328 } 329 } 330 331 TSEXIT(); /* Here so we don't overlap with start_init. */ 332 333 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 334 mtx_unlock(&Giant); 335 336 /* 337 * Now hand over this thread to swapper. 338 */ 339 swapper(); 340 /* NOTREACHED*/ 341 } 342 343 static void 344 print_caddr_t(void *data) 345 { 346 printf("%s", (char *)data); 347 } 348 349 static void 350 print_version(void *data __unused) 351 { 352 int len; 353 354 /* Strip a trailing newline from version. */ 355 len = strlen(version); 356 while (len > 0 && version[len - 1] == '\n') 357 len--; 358 printf("%.*s %s\n", len, version, machine); 359 printf("%s\n", compiler_version); 360 } 361 362 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 363 copyright); 364 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 365 trademark); 366 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 367 368 #ifdef WITNESS 369 static char wit_warn[] = 370 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 371 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1, 372 print_caddr_t, wit_warn); 373 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 1, 374 print_caddr_t, wit_warn); 375 #endif 376 377 #ifdef DIAGNOSTIC 378 static char diag_warn[] = 379 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 380 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2, 381 print_caddr_t, diag_warn); 382 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_THIRD + 2, 383 print_caddr_t, diag_warn); 384 #endif 385 386 static int 387 null_fetch_syscall_args(struct thread *td __unused) 388 { 389 390 panic("null_fetch_syscall_args"); 391 } 392 393 static void 394 null_set_syscall_retval(struct thread *td __unused, int error __unused) 395 { 396 397 panic("null_set_syscall_retval"); 398 } 399 400 struct sysentvec null_sysvec = { 401 .sv_size = 0, 402 .sv_table = NULL, 403 .sv_mask = 0, 404 .sv_errsize = 0, 405 .sv_errtbl = NULL, 406 .sv_transtrap = NULL, 407 .sv_fixup = NULL, 408 .sv_sendsig = NULL, 409 .sv_sigcode = NULL, 410 .sv_szsigcode = NULL, 411 .sv_name = "null", 412 .sv_coredump = NULL, 413 .sv_imgact_try = NULL, 414 .sv_minsigstksz = 0, 415 .sv_pagesize = PAGE_SIZE, 416 .sv_minuser = VM_MIN_ADDRESS, 417 .sv_maxuser = VM_MAXUSER_ADDRESS, 418 .sv_usrstack = USRSTACK, 419 .sv_psstrings = PS_STRINGS, 420 .sv_stackprot = VM_PROT_ALL, 421 .sv_copyout_strings = NULL, 422 .sv_setregs = NULL, 423 .sv_fixlimit = NULL, 424 .sv_maxssiz = NULL, 425 .sv_flags = 0, 426 .sv_set_syscall_retval = null_set_syscall_retval, 427 .sv_fetch_syscall_args = null_fetch_syscall_args, 428 .sv_syscallnames = NULL, 429 .sv_schedtail = NULL, 430 .sv_thread_detach = NULL, 431 .sv_trap = NULL, 432 }; 433 434 /* 435 * The two following SYSINIT's are proc0 specific glue code. I am not 436 * convinced that they can not be safely combined, but their order of 437 * operation has been maintained as the same as the original init_main.c 438 * for right now. 439 */ 440 /* ARGSUSED*/ 441 static void 442 proc0_init(void *dummy __unused) 443 { 444 struct proc *p; 445 struct thread *td; 446 struct ucred *newcred; 447 struct uidinfo tmpuinfo; 448 struct loginclass tmplc = { 449 .lc_name = "", 450 }; 451 vm_paddr_t pageablemem; 452 int i; 453 454 GIANT_REQUIRED; 455 p = &proc0; 456 td = &thread0; 457 458 /* 459 * Initialize magic number and osrel. 460 */ 461 p->p_magic = P_MAGIC; 462 p->p_osrel = osreldate; 463 464 /* 465 * Initialize thread and process structures. 466 */ 467 procinit(); /* set up proc zone */ 468 threadinit(); /* set up UMA zones */ 469 470 /* 471 * Initialise scheduler resources. 472 * Add scheduler specific parts to proc, thread as needed. 473 */ 474 schedinit(); /* scheduler gets its house in order */ 475 476 /* 477 * Create process 0 (the swapper). 478 */ 479 LIST_INSERT_HEAD(&allproc, p, p_list); 480 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 481 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 482 p->p_pgrp = &pgrp0; 483 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 484 LIST_INIT(&pgrp0.pg_members); 485 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 486 487 pgrp0.pg_session = &session0; 488 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 489 refcount_init(&session0.s_count, 1); 490 session0.s_leader = p; 491 492 p->p_sysent = &null_sysvec; 493 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 494 p->p_flag2 = 0; 495 p->p_state = PRS_NORMAL; 496 p->p_klist = knlist_alloc(&p->p_mtx); 497 STAILQ_INIT(&p->p_ktr); 498 p->p_nice = NZERO; 499 /* pid_max cannot be greater than PID_MAX */ 500 td->td_tid = PID_MAX + 1; 501 LIST_INSERT_HEAD(TIDHASH(td->td_tid), td, td_hash); 502 td->td_state = TDS_RUNNING; 503 td->td_pri_class = PRI_TIMESHARE; 504 td->td_user_pri = PUSER; 505 td->td_base_user_pri = PUSER; 506 td->td_lend_user_pri = PRI_MAX; 507 td->td_priority = PVM; 508 td->td_base_pri = PVM; 509 td->td_oncpu = curcpu; 510 td->td_flags = TDF_INMEM; 511 td->td_pflags = TDP_KTHREAD; 512 td->td_cpuset = cpuset_thread0(); 513 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 514 epoch_thread_init(td); 515 prison0_init(); 516 p->p_peers = 0; 517 p->p_leader = p; 518 p->p_reaper = p; 519 p->p_treeflag |= P_TREE_REAPER; 520 LIST_INIT(&p->p_reaplist); 521 522 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 523 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 524 525 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 526 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 527 callout_init(&td->td_slpcallout, 1); 528 529 /* Create credentials. */ 530 newcred = crget(); 531 newcred->cr_ngroups = 1; /* group 0 */ 532 /* A hack to prevent uifind from tripping over NULL pointers. */ 533 curthread->td_ucred = newcred; 534 tmpuinfo.ui_uid = 1; 535 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 536 newcred->cr_uidinfo = uifind(0); 537 newcred->cr_ruidinfo = uifind(0); 538 newcred->cr_loginclass = &tmplc; 539 newcred->cr_loginclass = loginclass_find("default"); 540 /* End hack. creds get properly set later with thread_cow_get_proc */ 541 curthread->td_ucred = NULL; 542 newcred->cr_prison = &prison0; 543 proc_set_cred_init(p, newcred); 544 #ifdef AUDIT 545 audit_cred_kproc0(newcred); 546 #endif 547 #ifdef MAC 548 mac_cred_create_swapper(newcred); 549 #endif 550 /* Create sigacts. */ 551 p->p_sigacts = sigacts_alloc(); 552 553 /* Initialize signal state for process 0. */ 554 siginit(&proc0); 555 556 /* Create the file descriptor table. */ 557 p->p_fd = fdinit(NULL, false); 558 p->p_fdtol = NULL; 559 560 /* Create the limits structures. */ 561 p->p_limit = lim_alloc(); 562 for (i = 0; i < RLIM_NLIMITS; i++) 563 p->p_limit->pl_rlimit[i].rlim_cur = 564 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 565 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 566 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 567 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 568 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 569 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 570 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 571 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 572 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 573 /* Cast to avoid overflow on i386/PAE. */ 574 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 575 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 576 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 577 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 578 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 579 p->p_cpulimit = RLIM_INFINITY; 580 581 PROC_LOCK(p); 582 thread_cow_get_proc(td, p); 583 PROC_UNLOCK(p); 584 585 /* Initialize resource accounting structures. */ 586 racct_create(&p->p_racct); 587 588 p->p_stats = pstats_alloc(); 589 590 /* Allocate a prototype map so we have something to fork. */ 591 p->p_vmspace = &vmspace0; 592 vmspace0.vm_refcnt = 1; 593 pmap_pinit0(vmspace_pmap(&vmspace0)); 594 595 /* 596 * proc0 is not expected to enter usermode, so there is no special 597 * handling for sv_minuser here, like is done for exec_new_vmspace(). 598 */ 599 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 600 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 601 602 /* 603 * Call the init and ctor for the new thread and proc. We wait 604 * to do this until all other structures are fairly sane. 605 */ 606 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 607 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 608 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 609 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 610 611 /* 612 * Charge root for one process. 613 */ 614 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 615 PROC_LOCK(p); 616 racct_add_force(p, RACCT_NPROC, 1); 617 PROC_UNLOCK(p); 618 } 619 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 620 621 /* ARGSUSED*/ 622 static void 623 proc0_post(void *dummy __unused) 624 { 625 struct timespec ts; 626 struct proc *p; 627 struct rusage ru; 628 struct thread *td; 629 630 /* 631 * Now we can look at the time, having had a chance to verify the 632 * time from the filesystem. Pretend that proc0 started now. 633 */ 634 sx_slock(&allproc_lock); 635 FOREACH_PROC_IN_SYSTEM(p) { 636 PROC_LOCK(p); 637 if (p->p_state == PRS_NEW) { 638 PROC_UNLOCK(p); 639 continue; 640 } 641 microuptime(&p->p_stats->p_start); 642 PROC_STATLOCK(p); 643 rufetch(p, &ru); /* Clears thread stats */ 644 p->p_rux.rux_runtime = 0; 645 p->p_rux.rux_uticks = 0; 646 p->p_rux.rux_sticks = 0; 647 p->p_rux.rux_iticks = 0; 648 PROC_STATUNLOCK(p); 649 FOREACH_THREAD_IN_PROC(p, td) { 650 td->td_runtime = 0; 651 } 652 PROC_UNLOCK(p); 653 } 654 sx_sunlock(&allproc_lock); 655 PCPU_SET(switchtime, cpu_ticks()); 656 PCPU_SET(switchticks, ticks); 657 658 /* 659 * Give the ``random'' number generator a thump. 660 */ 661 nanotime(&ts); 662 srandom(ts.tv_sec ^ ts.tv_nsec); 663 } 664 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 665 666 static void 667 random_init(void *dummy __unused) 668 { 669 670 /* 671 * After CPU has been started we have some randomness on most 672 * platforms via get_cyclecount(). For platforms that don't 673 * we will reseed random(9) in proc0_post() as well. 674 */ 675 srandom(get_cyclecount()); 676 } 677 SYSINIT(random, SI_SUB_RANDOM, SI_ORDER_FIRST, random_init, NULL); 678 679 /* 680 *************************************************************************** 681 **** 682 **** The following SYSINIT's and glue code should be moved to the 683 **** respective files on a per subsystem basis. 684 **** 685 *************************************************************************** 686 */ 687 688 /* 689 * List of paths to try when searching for "init". 690 */ 691 static char init_path[MAXPATHLEN] = 692 #ifdef INIT_PATH 693 __XSTRING(INIT_PATH); 694 #else 695 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 696 #endif 697 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 698 "Path used to search the init process"); 699 700 /* 701 * Shutdown timeout of init(8). 702 * Unused within kernel, but used to control init(8), hence do not remove. 703 */ 704 #ifndef INIT_SHUTDOWN_TIMEOUT 705 #define INIT_SHUTDOWN_TIMEOUT 120 706 #endif 707 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 708 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 709 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 710 "Unused within kernel, but used to control init(8)"); 711 712 /* 713 * Start the initial user process; try exec'ing each pathname in init_path. 714 * The program is invoked with one argument containing the boot flags. 715 */ 716 static void 717 start_init(void *dummy) 718 { 719 vm_offset_t addr; 720 struct execve_args args; 721 int options, error; 722 size_t pathlen; 723 char *var, *path; 724 char *free_init_path, *tmp_init_path; 725 char *ucp, **uap, *arg0, *arg1; 726 struct thread *td; 727 struct proc *p; 728 729 TSENTER(); /* Here so we don't overlap with mi_startup. */ 730 731 td = curthread; 732 p = td->td_proc; 733 734 vfs_mountroot(); 735 736 /* Wipe GELI passphrase from the environment. */ 737 kern_unsetenv("kern.geom.eli.passphrase"); 738 739 /* 740 * Need just enough stack to hold the faked-up "execve()" arguments. 741 */ 742 addr = p->p_sysent->sv_usrstack - PAGE_SIZE; 743 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE, 0, 744 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0) 745 panic("init: couldn't allocate argument space"); 746 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 747 p->p_vmspace->vm_ssize = 1; 748 749 if ((var = kern_getenv("init_path")) != NULL) { 750 strlcpy(init_path, var, sizeof(init_path)); 751 freeenv(var); 752 } 753 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 754 755 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 756 pathlen = strlen(path) + 1; 757 if (bootverbose) 758 printf("start_init: trying %s\n", path); 759 760 /* 761 * Move out the boot flag argument. 762 */ 763 options = 0; 764 ucp = (char *)p->p_sysent->sv_usrstack; 765 (void)subyte(--ucp, 0); /* trailing zero */ 766 if (boothowto & RB_SINGLE) { 767 (void)subyte(--ucp, 's'); 768 options = 1; 769 } 770 #ifdef notyet 771 if (boothowto & RB_FASTBOOT) { 772 (void)subyte(--ucp, 'f'); 773 options = 1; 774 } 775 #endif 776 777 #ifdef BOOTCDROM 778 (void)subyte(--ucp, 'C'); 779 options = 1; 780 #endif 781 782 if (options == 0) 783 (void)subyte(--ucp, '-'); 784 (void)subyte(--ucp, '-'); /* leading hyphen */ 785 arg1 = ucp; 786 787 /* 788 * Move out the file name (also arg 0). 789 */ 790 ucp -= pathlen; 791 copyout(path, ucp, pathlen); 792 arg0 = ucp; 793 794 /* 795 * Move out the arg pointers. 796 */ 797 uap = (char **)rounddown2((intptr_t)ucp, sizeof(intptr_t)); 798 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 799 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 800 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 801 802 /* 803 * Point at the arguments. 804 */ 805 args.fname = arg0; 806 args.argv = uap; 807 args.envv = NULL; 808 809 /* 810 * Now try to exec the program. If can't for any reason 811 * other than it doesn't exist, complain. 812 * 813 * Otherwise, return via fork_trampoline() all the way 814 * to user mode as init! 815 */ 816 if ((error = sys_execve(td, &args)) == EJUSTRETURN) { 817 free(free_init_path, M_TEMP); 818 TSEXIT(); 819 return; 820 } 821 if (error != ENOENT) 822 printf("exec %s: error %d\n", path, error); 823 } 824 free(free_init_path, M_TEMP); 825 printf("init: not found in path %s\n", init_path); 826 panic("no init"); 827 } 828 829 /* 830 * Like kproc_create(), but runs in its own address space. 831 * We do this early to reserve pid 1. 832 * 833 * Note special case - do not make it runnable yet. Other work 834 * in progress will change this more. 835 */ 836 static void 837 create_init(const void *udata __unused) 838 { 839 struct fork_req fr; 840 struct ucred *newcred, *oldcred; 841 struct thread *td; 842 int error; 843 844 bzero(&fr, sizeof(fr)); 845 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 846 fr.fr_procp = &initproc; 847 error = fork1(&thread0, &fr); 848 if (error) 849 panic("cannot fork init: %d\n", error); 850 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 851 /* divorce init's credentials from the kernel's */ 852 newcred = crget(); 853 sx_xlock(&proctree_lock); 854 PROC_LOCK(initproc); 855 initproc->p_flag |= P_SYSTEM | P_INMEM; 856 initproc->p_treeflag |= P_TREE_REAPER; 857 oldcred = initproc->p_ucred; 858 crcopy(newcred, oldcred); 859 #ifdef MAC 860 mac_cred_create_init(newcred); 861 #endif 862 #ifdef AUDIT 863 audit_cred_proc1(newcred); 864 #endif 865 proc_set_cred(initproc, newcred); 866 td = FIRST_THREAD_IN_PROC(initproc); 867 crfree(td->td_ucred); 868 td->td_ucred = crhold(initproc->p_ucred); 869 PROC_UNLOCK(initproc); 870 sx_xunlock(&proctree_lock); 871 crfree(oldcred); 872 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 873 start_init, NULL); 874 } 875 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 876 877 /* 878 * Make it runnable now. 879 */ 880 static void 881 kick_init(const void *udata __unused) 882 { 883 struct thread *td; 884 885 td = FIRST_THREAD_IN_PROC(initproc); 886 thread_lock(td); 887 TD_SET_CAN_RUN(td); 888 sched_add(td, SRQ_BORING); 889 thread_unlock(td); 890 } 891 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 892