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_kdb.h" 51 #include "opt_init_path.h" 52 #include "opt_verbose_sysinit.h" 53 54 #include <sys/param.h> 55 #include <sys/kernel.h> 56 #include <sys/epoch.h> 57 #include <sys/eventhandler.h> 58 #include <sys/exec.h> 59 #include <sys/file.h> 60 #include <sys/filedesc.h> 61 #include <sys/imgact.h> 62 #include <sys/jail.h> 63 #include <sys/ktr.h> 64 #include <sys/lock.h> 65 #include <sys/loginclass.h> 66 #include <sys/mount.h> 67 #include <sys/mutex.h> 68 #include <sys/dtrace_bsd.h> 69 #include <sys/syscallsubr.h> 70 #include <sys/sysctl.h> 71 #include <sys/proc.h> 72 #include <sys/racct.h> 73 #include <sys/resourcevar.h> 74 #include <sys/systm.h> 75 #include <sys/signalvar.h> 76 #include <sys/vnode.h> 77 #include <sys/sysent.h> 78 #include <sys/reboot.h> 79 #include <sys/sched.h> 80 #include <sys/sx.h> 81 #include <sys/sysproto.h> 82 #include <sys/vmmeter.h> 83 #include <sys/unistd.h> 84 #include <sys/malloc.h> 85 #include <sys/conf.h> 86 #include <sys/cpuset.h> 87 88 #include <machine/cpu.h> 89 90 #include <security/audit/audit.h> 91 #include <security/mac/mac_framework.h> 92 93 #include <vm/vm.h> 94 #include <vm/vm_param.h> 95 #include <vm/vm_extern.h> 96 #include <vm/pmap.h> 97 #include <vm/vm_map.h> 98 #include <sys/copyright.h> 99 100 #include <ddb/ddb.h> 101 #include <ddb/db_sym.h> 102 103 void mi_startup(void); /* Should be elsewhere */ 104 105 /* Components of the first process -- never freed. */ 106 static struct session session0; 107 static struct pgrp pgrp0; 108 struct proc proc0; 109 struct thread0_storage thread0_st __aligned(32); 110 struct vmspace vmspace0; 111 struct proc *initproc; 112 113 int 114 linux_alloc_current_noop(struct thread *td __unused, int flags __unused) 115 { 116 return (0); 117 } 118 int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop; 119 120 #ifndef BOOTHOWTO 121 #define BOOTHOWTO 0 122 #endif 123 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 124 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 125 "Boot control flags, passed from loader"); 126 127 #ifndef BOOTVERBOSE 128 #define BOOTVERBOSE 0 129 #endif 130 int bootverbose = BOOTVERBOSE; 131 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 132 "Control the output of verbose kernel messages"); 133 134 #ifdef VERBOSE_SYSINIT 135 /* 136 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 137 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 138 * option and associated tunable are: 139 * - 0, 'compiled in but silent by default' 140 * - 1, 'compiled in but verbose by default' (default) 141 */ 142 int verbose_sysinit = VERBOSE_SYSINIT; 143 TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 144 #endif 145 146 #ifdef INVARIANTS 147 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 148 #endif 149 150 /* 151 * This ensures that there is at least one entry so that the sysinit_set 152 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 153 * executed. 154 */ 155 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 156 157 /* 158 * The sysinit table itself. Items are checked off as the are run. 159 * If we want to register new sysinit types, add them to newsysinit. 160 */ 161 SET_DECLARE(sysinit_set, struct sysinit); 162 struct sysinit **sysinit, **sysinit_end; 163 struct sysinit **newsysinit, **newsysinit_end; 164 165 /* 166 * Merge a new sysinit set into the current set, reallocating it if 167 * necessary. This can only be called after malloc is running. 168 */ 169 void 170 sysinit_add(struct sysinit **set, struct sysinit **set_end) 171 { 172 struct sysinit **newset; 173 struct sysinit **sipp; 174 struct sysinit **xipp; 175 int count; 176 177 count = set_end - set; 178 if (newsysinit) 179 count += newsysinit_end - newsysinit; 180 else 181 count += sysinit_end - sysinit; 182 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 183 if (newset == NULL) 184 panic("cannot malloc for sysinit"); 185 xipp = newset; 186 if (newsysinit) 187 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 188 *xipp++ = *sipp; 189 else 190 for (sipp = sysinit; sipp < sysinit_end; sipp++) 191 *xipp++ = *sipp; 192 for (sipp = set; sipp < set_end; sipp++) 193 *xipp++ = *sipp; 194 if (newsysinit) 195 free(newsysinit, M_TEMP); 196 newsysinit = newset; 197 newsysinit_end = newset + count; 198 } 199 200 #if defined (DDB) && defined(VERBOSE_SYSINIT) 201 static const char * 202 symbol_name(vm_offset_t va, db_strategy_t strategy) 203 { 204 const char *name; 205 c_db_sym_t sym; 206 db_expr_t offset; 207 208 if (va == 0) 209 return (NULL); 210 sym = db_search_symbol(va, strategy, &offset); 211 if (offset != 0) 212 return (NULL); 213 db_symbol_values(sym, &name, NULL); 214 return (name); 215 } 216 #endif 217 218 /* 219 * System startup; initialize the world, create process 0, mount root 220 * filesystem, and fork to create init and pagedaemon. Most of the 221 * hard work is done in the lower-level initialization routines including 222 * startup(), which does memory initialization and autoconfiguration. 223 * 224 * This allows simple addition of new kernel subsystems that require 225 * boot time initialization. It also allows substitution of subsystem 226 * (for instance, a scheduler, kernel profiler, or VM system) by object 227 * module. Finally, it allows for optional "kernel threads". 228 */ 229 void 230 mi_startup(void) 231 { 232 233 struct sysinit **sipp; /* system initialization*/ 234 struct sysinit **xipp; /* interior loop of sort*/ 235 struct sysinit *save; /* bubble*/ 236 237 #if defined(VERBOSE_SYSINIT) 238 int last; 239 int verbose; 240 #endif 241 242 TSENTER(); 243 244 if (boothowto & RB_VERBOSE) 245 bootverbose++; 246 247 if (sysinit == NULL) { 248 sysinit = SET_BEGIN(sysinit_set); 249 sysinit_end = SET_LIMIT(sysinit_set); 250 } 251 252 restart: 253 /* 254 * Perform a bubble sort of the system initialization objects by 255 * their subsystem (primary key) and order (secondary key). 256 */ 257 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 258 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 259 if ((*sipp)->subsystem < (*xipp)->subsystem || 260 ((*sipp)->subsystem == (*xipp)->subsystem && 261 (*sipp)->order <= (*xipp)->order)) 262 continue; /* skip*/ 263 save = *sipp; 264 *sipp = *xipp; 265 *xipp = save; 266 } 267 } 268 269 #if defined(VERBOSE_SYSINIT) 270 last = SI_SUB_COPYRIGHT; 271 verbose = 0; 272 #if !defined(DDB) 273 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 274 #endif 275 #endif 276 277 /* 278 * Traverse the (now) ordered list of system initialization tasks. 279 * Perform each task, and continue on to the next task. 280 */ 281 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 282 if ((*sipp)->subsystem == SI_SUB_DUMMY) 283 continue; /* skip dummy task(s)*/ 284 285 if ((*sipp)->subsystem == SI_SUB_DONE) 286 continue; 287 288 #if defined(VERBOSE_SYSINIT) 289 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 290 verbose = 1; 291 last = (*sipp)->subsystem; 292 printf("subsystem %x\n", last); 293 } 294 if (verbose) { 295 #if defined(DDB) 296 const char *func, *data; 297 298 func = symbol_name((vm_offset_t)(*sipp)->func, 299 DB_STGY_PROC); 300 data = symbol_name((vm_offset_t)(*sipp)->udata, 301 DB_STGY_ANY); 302 if (func != NULL && data != NULL) 303 printf(" %s(&%s)... ", func, data); 304 else if (func != NULL) 305 printf(" %s(%p)... ", func, (*sipp)->udata); 306 else 307 #endif 308 printf(" %p(%p)... ", (*sipp)->func, 309 (*sipp)->udata); 310 } 311 #endif 312 313 /* Call function */ 314 (*((*sipp)->func))((*sipp)->udata); 315 316 #if defined(VERBOSE_SYSINIT) 317 if (verbose) 318 printf("done.\n"); 319 #endif 320 321 /* Check off the one we're just done */ 322 (*sipp)->subsystem = SI_SUB_DONE; 323 324 /* Check if we've installed more sysinit items via KLD */ 325 if (newsysinit != NULL) { 326 if (sysinit != SET_BEGIN(sysinit_set)) 327 free(sysinit, M_TEMP); 328 sysinit = newsysinit; 329 sysinit_end = newsysinit_end; 330 newsysinit = NULL; 331 newsysinit_end = NULL; 332 goto restart; 333 } 334 } 335 336 TSEXIT(); /* Here so we don't overlap with start_init. */ 337 338 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 339 mtx_unlock(&Giant); 340 341 /* 342 * Now hand over this thread to swapper. 343 */ 344 swapper(); 345 /* NOTREACHED*/ 346 } 347 348 static void 349 print_caddr_t(void *data) 350 { 351 printf("%s", (char *)data); 352 } 353 354 static void 355 print_version(void *data __unused) 356 { 357 int len; 358 359 /* Strip a trailing newline from version. */ 360 len = strlen(version); 361 while (len > 0 && version[len - 1] == '\n') 362 len--; 363 printf("%.*s %s\n", len, version, machine); 364 printf("%s\n", compiler_version); 365 } 366 367 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 368 copyright); 369 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 370 trademark); 371 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 372 373 #ifdef WITNESS 374 static char wit_warn[] = 375 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 376 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 377 print_caddr_t, wit_warn); 378 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 379 print_caddr_t, wit_warn); 380 #endif 381 382 #ifdef DIAGNOSTIC 383 static char diag_warn[] = 384 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 385 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 386 print_caddr_t, diag_warn); 387 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 388 print_caddr_t, diag_warn); 389 #endif 390 391 static int 392 null_fetch_syscall_args(struct thread *td __unused) 393 { 394 395 panic("null_fetch_syscall_args"); 396 } 397 398 static void 399 null_set_syscall_retval(struct thread *td __unused, int error __unused) 400 { 401 402 panic("null_set_syscall_retval"); 403 } 404 405 struct sysentvec null_sysvec = { 406 .sv_size = 0, 407 .sv_table = NULL, 408 .sv_transtrap = NULL, 409 .sv_fixup = NULL, 410 .sv_sendsig = NULL, 411 .sv_sigcode = NULL, 412 .sv_szsigcode = NULL, 413 .sv_name = "null", 414 .sv_coredump = NULL, 415 .sv_imgact_try = NULL, 416 .sv_minsigstksz = 0, 417 .sv_minuser = VM_MIN_ADDRESS, 418 .sv_maxuser = VM_MAXUSER_ADDRESS, 419 .sv_usrstack = USRSTACK, 420 .sv_psstrings = PS_STRINGS, 421 .sv_stackprot = VM_PROT_ALL, 422 .sv_copyout_strings = NULL, 423 .sv_setregs = NULL, 424 .sv_fixlimit = NULL, 425 .sv_maxssiz = NULL, 426 .sv_flags = 0, 427 .sv_set_syscall_retval = null_set_syscall_retval, 428 .sv_fetch_syscall_args = null_fetch_syscall_args, 429 .sv_syscallnames = NULL, 430 .sv_schedtail = NULL, 431 .sv_thread_detach = NULL, 432 .sv_trap = NULL, 433 }; 434 435 /* 436 * The two following SYSINIT's are proc0 specific glue code. I am not 437 * convinced that they can not be safely combined, but their order of 438 * operation has been maintained as the same as the original init_main.c 439 * for right now. 440 */ 441 /* ARGSUSED*/ 442 static void 443 proc0_init(void *dummy __unused) 444 { 445 struct proc *p; 446 struct thread *td; 447 struct ucred *newcred; 448 struct uidinfo tmpuinfo; 449 struct loginclass tmplc = { 450 .lc_name = "", 451 }; 452 vm_paddr_t pageablemem; 453 int i; 454 455 GIANT_REQUIRED; 456 p = &proc0; 457 td = &thread0; 458 459 /* 460 * Initialize magic number and osrel. 461 */ 462 p->p_magic = P_MAGIC; 463 p->p_osrel = osreldate; 464 465 /* 466 * Initialize thread and process structures. 467 */ 468 procinit(); /* set up proc zone */ 469 threadinit(); /* set up UMA zones */ 470 471 /* 472 * Initialise scheduler resources. 473 * Add scheduler specific parts to proc, thread as needed. 474 */ 475 schedinit(); /* scheduler gets its house in order */ 476 477 /* 478 * Create process 0 (the swapper). 479 */ 480 LIST_INSERT_HEAD(&allproc, p, p_list); 481 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 482 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 483 p->p_pgrp = &pgrp0; 484 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 485 LIST_INIT(&pgrp0.pg_members); 486 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 487 488 pgrp0.pg_session = &session0; 489 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 490 refcount_init(&session0.s_count, 1); 491 session0.s_leader = p; 492 493 p->p_sysent = &null_sysvec; 494 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 495 p->p_flag2 = 0; 496 p->p_state = PRS_NORMAL; 497 p->p_klist = knlist_alloc(&p->p_mtx); 498 STAILQ_INIT(&p->p_ktr); 499 p->p_nice = NZERO; 500 td->td_tid = THREAD0_TID; 501 tidhash_add(td); 502 TD_SET_STATE(td, 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 prison0_init(); 515 p->p_peers = 0; 516 p->p_leader = p; 517 p->p_reaper = p; 518 p->p_treeflag |= P_TREE_REAPER; 519 LIST_INIT(&p->p_reaplist); 520 521 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 522 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 523 524 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 525 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 526 callout_init(&td->td_slpcallout, 1); 527 528 /* Create credentials. */ 529 newcred = crget(); 530 newcred->cr_ngroups = 1; /* group 0 */ 531 /* A hack to prevent uifind from tripping over NULL pointers. */ 532 curthread->td_ucred = newcred; 533 tmpuinfo.ui_uid = 1; 534 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 535 newcred->cr_uidinfo = uifind(0); 536 newcred->cr_ruidinfo = uifind(0); 537 newcred->cr_loginclass = &tmplc; 538 newcred->cr_loginclass = loginclass_find("default"); 539 /* End hack. creds get properly set later with thread_cow_get_proc */ 540 curthread->td_ucred = NULL; 541 newcred->cr_prison = &prison0; 542 newcred->cr_users++; /* avoid assertion failure */ 543 proc_set_cred_init(p, newcred); 544 newcred->cr_users--; 545 crfree(newcred); 546 #ifdef AUDIT 547 audit_cred_kproc0(newcred); 548 #endif 549 #ifdef MAC 550 mac_cred_create_swapper(newcred); 551 #endif 552 /* Create sigacts. */ 553 p->p_sigacts = sigacts_alloc(); 554 555 /* Initialize signal state for process 0. */ 556 siginit(&proc0); 557 558 /* Create the file descriptor table. */ 559 p->p_pd = pdinit(NULL, false); 560 p->p_fd = fdinit(NULL, false, NULL); 561 p->p_fdtol = NULL; 562 563 /* Create the limits structures. */ 564 p->p_limit = lim_alloc(); 565 for (i = 0; i < RLIM_NLIMITS; i++) 566 p->p_limit->pl_rlimit[i].rlim_cur = 567 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 568 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 569 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 570 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 571 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 572 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 573 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 574 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 575 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 576 /* Cast to avoid overflow on i386/PAE. */ 577 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 578 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 579 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 580 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 581 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 582 p->p_cpulimit = RLIM_INFINITY; 583 584 PROC_LOCK(p); 585 thread_cow_get_proc(td, p); 586 PROC_UNLOCK(p); 587 588 /* Initialize resource accounting structures. */ 589 racct_create(&p->p_racct); 590 591 p->p_stats = pstats_alloc(); 592 593 /* Allocate a prototype map so we have something to fork. */ 594 p->p_vmspace = &vmspace0; 595 refcount_init(&vmspace0.vm_refcnt, 1); 596 pmap_pinit0(vmspace_pmap(&vmspace0)); 597 598 /* 599 * proc0 is not expected to enter usermode, so there is no special 600 * handling for sv_minuser here, like is done for exec_new_vmspace(). 601 */ 602 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 603 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 604 605 /* 606 * Call the init and ctor for the new thread and proc. We wait 607 * to do this until all other structures are fairly sane. 608 */ 609 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 610 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 611 #ifdef KDTRACE_HOOKS 612 kdtrace_proc_ctor(p); 613 kdtrace_thread_ctor(td); 614 #endif 615 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 616 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 617 618 /* 619 * Charge root for one process. 620 */ 621 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 622 PROC_LOCK(p); 623 racct_add_force(p, RACCT_NPROC, 1); 624 PROC_UNLOCK(p); 625 } 626 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 627 628 /* ARGSUSED*/ 629 static void 630 proc0_post(void *dummy __unused) 631 { 632 struct proc *p; 633 struct rusage ru; 634 struct thread *td; 635 636 /* 637 * Now we can look at the time, having had a chance to verify the 638 * time from the filesystem. Pretend that proc0 started now. 639 */ 640 sx_slock(&allproc_lock); 641 FOREACH_PROC_IN_SYSTEM(p) { 642 PROC_LOCK(p); 643 if (p->p_state == PRS_NEW) { 644 PROC_UNLOCK(p); 645 continue; 646 } 647 microuptime(&p->p_stats->p_start); 648 PROC_STATLOCK(p); 649 rufetch(p, &ru); /* Clears thread stats */ 650 p->p_rux.rux_runtime = 0; 651 p->p_rux.rux_uticks = 0; 652 p->p_rux.rux_sticks = 0; 653 p->p_rux.rux_iticks = 0; 654 PROC_STATUNLOCK(p); 655 FOREACH_THREAD_IN_PROC(p, td) { 656 td->td_runtime = 0; 657 } 658 PROC_UNLOCK(p); 659 } 660 sx_sunlock(&allproc_lock); 661 PCPU_SET(switchtime, cpu_ticks()); 662 PCPU_SET(switchticks, ticks); 663 } 664 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 665 666 /* 667 *************************************************************************** 668 **** 669 **** The following SYSINIT's and glue code should be moved to the 670 **** respective files on a per subsystem basis. 671 **** 672 *************************************************************************** 673 */ 674 675 /* 676 * List of paths to try when searching for "init". 677 */ 678 static char init_path[MAXPATHLEN] = 679 #ifdef INIT_PATH 680 __XSTRING(INIT_PATH); 681 #else 682 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 683 #endif 684 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 685 "Path used to search the init process"); 686 687 /* 688 * Shutdown timeout of init(8). 689 * Unused within kernel, but used to control init(8), hence do not remove. 690 */ 691 #ifndef INIT_SHUTDOWN_TIMEOUT 692 #define INIT_SHUTDOWN_TIMEOUT 120 693 #endif 694 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 695 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 696 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 697 "Unused within kernel, but used to control init(8)"); 698 699 /* 700 * Start the initial user process; try exec'ing each pathname in init_path. 701 * The program is invoked with one argument containing the boot flags. 702 */ 703 static void 704 start_init(void *dummy) 705 { 706 struct image_args args; 707 int error; 708 char *var, *path; 709 char *free_init_path, *tmp_init_path; 710 struct thread *td; 711 struct proc *p; 712 struct vmspace *oldvmspace; 713 714 TSENTER(); /* Here so we don't overlap with mi_startup. */ 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 /* For Multicons, report which console is primary to both */ 725 if (boothowto & RB_MULTIPLE) { 726 if (boothowto & RB_SERIAL) 727 printf("Dual Console: Serial Primary, Video Secondary\n"); 728 else 729 printf("Dual Console: Video Primary, Serial Secondary\n"); 730 } 731 732 if ((var = kern_getenv("init_path")) != NULL) { 733 strlcpy(init_path, var, sizeof(init_path)); 734 freeenv(var); 735 } 736 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 737 738 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 739 if (bootverbose) 740 printf("start_init: trying %s\n", path); 741 742 memset(&args, 0, sizeof(args)); 743 error = exec_alloc_args(&args); 744 if (error != 0) 745 panic("%s: Can't allocate space for init arguments %d", 746 __func__, error); 747 748 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 749 if (error != 0) 750 panic("%s: Can't add fname %d", __func__, error); 751 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 752 if (error != 0) 753 panic("%s: Can't add argv[0] %d", __func__, error); 754 if (boothowto & RB_SINGLE) 755 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 756 if (error != 0) 757 panic("%s: Can't add argv[0] %d", __func__, error); 758 759 /* 760 * Now try to exec the program. If can't for any reason 761 * other than it doesn't exist, complain. 762 * 763 * Otherwise, return via fork_trampoline() all the way 764 * to user mode as init! 765 */ 766 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 767 ("nested execve")); 768 oldvmspace = td->td_proc->p_vmspace; 769 error = kern_execve(td, &args, NULL, oldvmspace); 770 KASSERT(error != 0, 771 ("kern_execve returned success, not EJUSTRETURN")); 772 if (error == EJUSTRETURN) { 773 exec_cleanup(td, oldvmspace); 774 free(free_init_path, M_TEMP); 775 TSEXIT(); 776 return; 777 } 778 if (error != ENOENT) 779 printf("exec %s: error %d\n", path, error); 780 } 781 free(free_init_path, M_TEMP); 782 printf("init: not found in path %s\n", init_path); 783 panic("no init"); 784 } 785 786 /* 787 * Like kproc_create(), but runs in its own address space. We do this 788 * early to reserve pid 1. Note special case - do not make it 789 * runnable yet, init execution is started when userspace can be served. 790 */ 791 static void 792 create_init(const void *udata __unused) 793 { 794 struct fork_req fr; 795 struct ucred *newcred, *oldcred; 796 struct thread *td; 797 int error; 798 799 bzero(&fr, sizeof(fr)); 800 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 801 fr.fr_procp = &initproc; 802 error = fork1(&thread0, &fr); 803 if (error) 804 panic("cannot fork init: %d\n", error); 805 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 806 /* divorce init's credentials from the kernel's */ 807 newcred = crget(); 808 sx_xlock(&proctree_lock); 809 PROC_LOCK(initproc); 810 initproc->p_flag |= P_SYSTEM | P_INMEM; 811 initproc->p_treeflag |= P_TREE_REAPER; 812 oldcred = initproc->p_ucred; 813 crcopy(newcred, oldcred); 814 #ifdef MAC 815 mac_cred_create_init(newcred); 816 #endif 817 #ifdef AUDIT 818 audit_cred_proc1(newcred); 819 #endif 820 proc_set_cred(initproc, newcred); 821 td = FIRST_THREAD_IN_PROC(initproc); 822 crcowfree(td); 823 td->td_realucred = crcowget(initproc->p_ucred); 824 td->td_ucred = td->td_realucred; 825 PROC_UNLOCK(initproc); 826 sx_xunlock(&proctree_lock); 827 crfree(oldcred); 828 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 829 start_init, NULL); 830 } 831 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 832 833 /* 834 * Make it runnable now. 835 */ 836 static void 837 kick_init(const void *udata __unused) 838 { 839 struct thread *td; 840 841 td = FIRST_THREAD_IN_PROC(initproc); 842 thread_lock(td); 843 TD_SET_CAN_RUN(td); 844 sched_add(td, SRQ_BORING); 845 } 846 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 847 848 /* 849 * DDB(4). 850 */ 851 #ifdef DDB 852 static void 853 db_show_print_syinit(struct sysinit *sip, bool ddb) 854 { 855 const char *sname, *funcname; 856 c_db_sym_t sym; 857 db_expr_t offset; 858 859 #define xprint(...) \ 860 if (ddb) \ 861 db_printf(__VA_ARGS__); \ 862 else \ 863 printf(__VA_ARGS__) 864 865 if (sip == NULL) { 866 xprint("%s: no sysinit * given\n", __func__); 867 return; 868 } 869 870 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 871 db_symbol_values(sym, &sname, NULL); 872 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 873 db_symbol_values(sym, &funcname, NULL); 874 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 875 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 876 xprint(" %p(%s)(%p)\n", 877 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 878 #undef xprint 879 } 880 881 DB_SHOW_COMMAND(sysinit, db_show_sysinit) 882 { 883 struct sysinit **sipp; 884 885 db_printf("SYSINIT vs Name(Ptr)\n"); 886 db_printf(" Subsystem Order\n"); 887 db_printf(" Function(Name)(Arg)\n"); 888 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 889 db_show_print_syinit(*sipp, true); 890 if (db_pager_quit) 891 break; 892 } 893 } 894 #endif /* DDB */ 895