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/systm.h> 56 #include <sys/boottrace.h> 57 #include <sys/conf.h> 58 #include <sys/cpuset.h> 59 #include <sys/dtrace_bsd.h> 60 #include <sys/epoch.h> 61 #include <sys/eventhandler.h> 62 #include <sys/exec.h> 63 #include <sys/file.h> 64 #include <sys/filedesc.h> 65 #include <sys/imgact.h> 66 #include <sys/jail.h> 67 #include <sys/kernel.h> 68 #include <sys/ktr.h> 69 #include <sys/lock.h> 70 #include <sys/loginclass.h> 71 #include <sys/malloc.h> 72 #include <sys/mount.h> 73 #include <sys/mutex.h> 74 #include <sys/proc.h> 75 #include <sys/racct.h> 76 #include <sys/reboot.h> 77 #include <sys/resourcevar.h> 78 #include <sys/sched.h> 79 #include <sys/signalvar.h> 80 #include <sys/sx.h> 81 #include <sys/syscallsubr.h> 82 #include <sys/sysctl.h> 83 #include <sys/sysent.h> 84 #include <sys/sysproto.h> 85 #include <sys/unistd.h> 86 #include <sys/vmmeter.h> 87 #include <sys/vnode.h> 88 89 #include <machine/cpu.h> 90 91 #include <security/audit/audit.h> 92 #include <security/mac/mac_framework.h> 93 94 #include <vm/vm.h> 95 #include <vm/vm_param.h> 96 #include <vm/vm_extern.h> 97 #include <vm/pmap.h> 98 #include <vm/vm_map.h> 99 #include <sys/copyright.h> 100 101 #include <ddb/ddb.h> 102 #include <ddb/db_sym.h> 103 104 void mi_startup(void); /* Should be elsewhere */ 105 106 /* Components of the first process -- never freed. */ 107 static struct session session0; 108 static struct pgrp pgrp0; 109 struct proc proc0; 110 struct thread0_storage thread0_st __aligned(32); 111 struct vmspace vmspace0; 112 struct proc *initproc; 113 114 int 115 linux_alloc_current_noop(struct thread *td __unused, int flags __unused) 116 { 117 return (0); 118 } 119 int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop; 120 121 #ifndef BOOTHOWTO 122 #define BOOTHOWTO 0 123 #endif 124 int boothowto = BOOTHOWTO; /* initialized so that it can be patched */ 125 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 126 "Boot control flags, passed from loader"); 127 128 #ifndef BOOTVERBOSE 129 #define BOOTVERBOSE 0 130 #endif 131 int bootverbose = BOOTVERBOSE; 132 SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, 133 "Control the output of verbose kernel messages"); 134 135 #ifdef VERBOSE_SYSINIT 136 /* 137 * We'll use the defined value of VERBOSE_SYSINIT from the kernel config to 138 * dictate the default VERBOSE_SYSINIT behavior. Significant values for this 139 * option and associated tunable are: 140 * - 0, 'compiled in but silent by default' 141 * - 1, 'compiled in but verbose by default' (default) 142 */ 143 int verbose_sysinit = VERBOSE_SYSINIT; 144 TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit); 145 #endif 146 147 #ifdef INVARIANTS 148 FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance"); 149 #endif 150 151 /* 152 * This ensures that there is at least one entry so that the sysinit_set 153 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never 154 * executed. 155 */ 156 SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL); 157 158 /* 159 * The sysinit table itself. Items are checked off as the are run. 160 * If we want to register new sysinit types, add them to newsysinit. 161 */ 162 SET_DECLARE(sysinit_set, struct sysinit); 163 struct sysinit **sysinit, **sysinit_end; 164 struct sysinit **newsysinit, **newsysinit_end; 165 166 /* 167 * Merge a new sysinit set into the current set, reallocating it if 168 * necessary. This can only be called after malloc is running. 169 */ 170 void 171 sysinit_add(struct sysinit **set, struct sysinit **set_end) 172 { 173 struct sysinit **newset; 174 struct sysinit **sipp; 175 struct sysinit **xipp; 176 int count; 177 178 count = set_end - set; 179 if (newsysinit) 180 count += newsysinit_end - newsysinit; 181 else 182 count += sysinit_end - sysinit; 183 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT); 184 if (newset == NULL) 185 panic("cannot malloc for sysinit"); 186 xipp = newset; 187 if (newsysinit) 188 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 189 *xipp++ = *sipp; 190 else 191 for (sipp = sysinit; sipp < sysinit_end; sipp++) 192 *xipp++ = *sipp; 193 for (sipp = set; sipp < set_end; sipp++) 194 *xipp++ = *sipp; 195 if (newsysinit) 196 free(newsysinit, M_TEMP); 197 newsysinit = newset; 198 newsysinit_end = newset + count; 199 } 200 201 #if defined (DDB) && defined(VERBOSE_SYSINIT) 202 static const char * 203 symbol_name(vm_offset_t va, db_strategy_t strategy) 204 { 205 const char *name; 206 c_db_sym_t sym; 207 db_expr_t offset; 208 209 if (va == 0) 210 return (NULL); 211 sym = db_search_symbol(va, strategy, &offset); 212 if (offset != 0) 213 return (NULL); 214 db_symbol_values(sym, &name, NULL); 215 return (name); 216 } 217 #endif 218 219 /* 220 * System startup; initialize the world, create process 0, mount root 221 * filesystem, and fork to create init and pagedaemon. Most of the 222 * hard work is done in the lower-level initialization routines including 223 * startup(), which does memory initialization and autoconfiguration. 224 * 225 * This allows simple addition of new kernel subsystems that require 226 * boot time initialization. It also allows substitution of subsystem 227 * (for instance, a scheduler, kernel profiler, or VM system) by object 228 * module. Finally, it allows for optional "kernel threads". 229 */ 230 void 231 mi_startup(void) 232 { 233 234 struct sysinit **sipp; /* system initialization*/ 235 struct sysinit **xipp; /* interior loop of sort*/ 236 struct sysinit *save; /* bubble*/ 237 238 int last; 239 #if defined(VERBOSE_SYSINIT) 240 int verbose; 241 #endif 242 243 TSENTER(); 244 245 if (boothowto & RB_VERBOSE) 246 bootverbose++; 247 248 if (sysinit == NULL) { 249 sysinit = SET_BEGIN(sysinit_set); 250 sysinit_end = SET_LIMIT(sysinit_set); 251 } 252 253 restart: 254 /* 255 * Perform a bubble sort of the system initialization objects by 256 * their subsystem (primary key) and order (secondary key). 257 */ 258 TSENTER2("bubblesort"); 259 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 260 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 261 if ((*sipp)->subsystem < (*xipp)->subsystem || 262 ((*sipp)->subsystem == (*xipp)->subsystem && 263 (*sipp)->order <= (*xipp)->order)) 264 continue; /* skip*/ 265 save = *sipp; 266 *sipp = *xipp; 267 *xipp = save; 268 } 269 } 270 TSEXIT2("bubblesort"); 271 272 last = SI_SUB_COPYRIGHT; 273 #if defined(VERBOSE_SYSINIT) 274 verbose = 0; 275 #if !defined(DDB) 276 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 277 #endif 278 #endif 279 280 /* 281 * Traverse the (now) ordered list of system initialization tasks. 282 * Perform each task, and continue on to the next task. 283 */ 284 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 285 if ((*sipp)->subsystem == SI_SUB_DUMMY) 286 continue; /* skip dummy task(s)*/ 287 288 if ((*sipp)->subsystem == SI_SUB_DONE) 289 continue; 290 291 if ((*sipp)->subsystem > last) 292 BOOTTRACE_INIT("sysinit 0x%7x", (*sipp)->subsystem); 293 294 #if defined(VERBOSE_SYSINIT) 295 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 296 verbose = 1; 297 printf("subsystem %x\n", last); 298 } 299 if (verbose) { 300 #if defined(DDB) 301 const char *func, *data; 302 303 func = symbol_name((vm_offset_t)(*sipp)->func, 304 DB_STGY_PROC); 305 data = symbol_name((vm_offset_t)(*sipp)->udata, 306 DB_STGY_ANY); 307 if (func != NULL && data != NULL) 308 printf(" %s(&%s)... ", func, data); 309 else if (func != NULL) 310 printf(" %s(%p)... ", func, (*sipp)->udata); 311 else 312 #endif 313 printf(" %p(%p)... ", (*sipp)->func, 314 (*sipp)->udata); 315 } 316 #endif 317 318 /* Call function */ 319 (*((*sipp)->func))((*sipp)->udata); 320 321 #if defined(VERBOSE_SYSINIT) 322 if (verbose) 323 printf("done.\n"); 324 #endif 325 326 /* Check off the one we're just done */ 327 last = (*sipp)->subsystem; 328 (*sipp)->subsystem = SI_SUB_DONE; 329 330 /* Check if we've installed more sysinit items via KLD */ 331 if (newsysinit != NULL) { 332 if (sysinit != SET_BEGIN(sysinit_set)) 333 free(sysinit, M_TEMP); 334 sysinit = newsysinit; 335 sysinit_end = newsysinit_end; 336 newsysinit = NULL; 337 newsysinit_end = NULL; 338 goto restart; 339 } 340 } 341 342 TSEXIT(); /* Here so we don't overlap with start_init. */ 343 BOOTTRACE("mi_startup done"); 344 345 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 346 mtx_unlock(&Giant); 347 348 /* 349 * Now hand over this thread to swapper. 350 */ 351 swapper(); 352 /* NOTREACHED*/ 353 } 354 355 static void 356 print_caddr_t(void *data) 357 { 358 printf("%s", (char *)data); 359 } 360 361 static void 362 print_version(void *data __unused) 363 { 364 int len; 365 366 /* Strip a trailing newline from version. */ 367 len = strlen(version); 368 while (len > 0 && version[len - 1] == '\n') 369 len--; 370 printf("%.*s %s\n", len, version, machine); 371 printf("%s\n", compiler_version); 372 } 373 374 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 375 copyright); 376 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 377 trademark); 378 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 379 380 #ifdef WITNESS 381 static char wit_warn[] = 382 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 383 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 384 print_caddr_t, wit_warn); 385 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 386 print_caddr_t, wit_warn); 387 #endif 388 389 #ifdef DIAGNOSTIC 390 static char diag_warn[] = 391 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 392 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 393 print_caddr_t, diag_warn); 394 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 395 print_caddr_t, diag_warn); 396 #endif 397 398 static int 399 null_fetch_syscall_args(struct thread *td __unused) 400 { 401 402 panic("null_fetch_syscall_args"); 403 } 404 405 static void 406 null_set_syscall_retval(struct thread *td __unused, int error __unused) 407 { 408 409 panic("null_set_syscall_retval"); 410 } 411 412 static void 413 null_set_fork_retval(struct thread *td __unused) 414 { 415 416 } 417 418 struct sysentvec null_sysvec = { 419 .sv_size = 0, 420 .sv_table = NULL, 421 .sv_fixup = NULL, 422 .sv_sendsig = NULL, 423 .sv_sigcode = NULL, 424 .sv_szsigcode = NULL, 425 .sv_name = "null", 426 .sv_coredump = NULL, 427 .sv_minsigstksz = 0, 428 .sv_minuser = VM_MIN_ADDRESS, 429 .sv_maxuser = VM_MAXUSER_ADDRESS, 430 .sv_usrstack = USRSTACK, 431 .sv_psstrings = PS_STRINGS, 432 .sv_psstringssz = sizeof(struct ps_strings), 433 .sv_stackprot = VM_PROT_ALL, 434 .sv_copyout_strings = NULL, 435 .sv_setregs = NULL, 436 .sv_fixlimit = NULL, 437 .sv_maxssiz = NULL, 438 .sv_flags = 0, 439 .sv_set_syscall_retval = null_set_syscall_retval, 440 .sv_fetch_syscall_args = null_fetch_syscall_args, 441 .sv_syscallnames = NULL, 442 .sv_schedtail = NULL, 443 .sv_thread_detach = NULL, 444 .sv_trap = NULL, 445 .sv_set_fork_retval = null_set_fork_retval, 446 .sv_regset_begin = NULL, 447 .sv_regset_end = NULL, 448 }; 449 450 /* 451 * The two following SYSINIT's are proc0 specific glue code. I am not 452 * convinced that they can not be safely combined, but their order of 453 * operation has been maintained as the same as the original init_main.c 454 * for right now. 455 */ 456 /* ARGSUSED*/ 457 static void 458 proc0_init(void *dummy __unused) 459 { 460 struct proc *p; 461 struct thread *td; 462 struct ucred *newcred; 463 struct uidinfo tmpuinfo; 464 struct loginclass tmplc = { 465 .lc_name = "", 466 }; 467 vm_paddr_t pageablemem; 468 int i; 469 470 GIANT_REQUIRED; 471 p = &proc0; 472 td = &thread0; 473 474 /* 475 * Initialize magic number and osrel. 476 */ 477 p->p_magic = P_MAGIC; 478 p->p_osrel = osreldate; 479 480 /* 481 * Initialize thread and process structures. 482 */ 483 procinit(); /* set up proc zone */ 484 threadinit(); /* set up UMA zones */ 485 486 /* 487 * Initialise scheduler resources. 488 * Add scheduler specific parts to proc, thread as needed. 489 */ 490 schedinit(); /* scheduler gets its house in order */ 491 492 /* 493 * Create process 0 (the swapper). 494 */ 495 LIST_INSERT_HEAD(&allproc, p, p_list); 496 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 497 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 498 p->p_pgrp = &pgrp0; 499 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 500 LIST_INIT(&pgrp0.pg_members); 501 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 502 503 pgrp0.pg_session = &session0; 504 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 505 refcount_init(&session0.s_count, 1); 506 session0.s_leader = p; 507 508 p->p_sysent = &null_sysvec; 509 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 510 p->p_flag2 = 0; 511 p->p_state = PRS_NORMAL; 512 p->p_klist = knlist_alloc(&p->p_mtx); 513 STAILQ_INIT(&p->p_ktr); 514 p->p_nice = NZERO; 515 td->td_tid = THREAD0_TID; 516 tidhash_add(td); 517 TD_SET_STATE(td, TDS_RUNNING); 518 td->td_pri_class = PRI_TIMESHARE; 519 td->td_user_pri = PUSER; 520 td->td_base_user_pri = PUSER; 521 td->td_lend_user_pri = PRI_MAX; 522 td->td_priority = PVM; 523 td->td_base_pri = PVM; 524 td->td_oncpu = curcpu; 525 td->td_flags = TDF_INMEM; 526 td->td_pflags = TDP_KTHREAD; 527 td->td_cpuset = cpuset_thread0(); 528 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 529 prison0_init(); 530 p->p_peers = 0; 531 p->p_leader = p; 532 p->p_reaper = p; 533 p->p_treeflag |= P_TREE_REAPER; 534 LIST_INIT(&p->p_reaplist); 535 536 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 537 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 538 539 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 540 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 541 callout_init(&td->td_slpcallout, 1); 542 TAILQ_INIT(&p->p_kqtim_stop); 543 544 /* Create credentials. */ 545 newcred = crget(); 546 newcred->cr_ngroups = 1; /* group 0 */ 547 /* A hack to prevent uifind from tripping over NULL pointers. */ 548 curthread->td_ucred = newcred; 549 tmpuinfo.ui_uid = 1; 550 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 551 newcred->cr_uidinfo = uifind(0); 552 newcred->cr_ruidinfo = uifind(0); 553 newcred->cr_loginclass = &tmplc; 554 newcred->cr_loginclass = loginclass_find("default"); 555 /* End hack. creds get properly set later with thread_cow_get_proc */ 556 curthread->td_ucred = NULL; 557 newcred->cr_prison = &prison0; 558 newcred->cr_users++; /* avoid assertion failure */ 559 proc_set_cred_init(p, newcred); 560 newcred->cr_users--; 561 crfree(newcred); 562 #ifdef AUDIT 563 audit_cred_kproc0(newcred); 564 #endif 565 #ifdef MAC 566 mac_cred_create_swapper(newcred); 567 #endif 568 /* Create sigacts. */ 569 p->p_sigacts = sigacts_alloc(); 570 571 /* Initialize signal state for process 0. */ 572 siginit(&proc0); 573 574 /* Create the file descriptor table. */ 575 p->p_pd = pdinit(NULL, false); 576 p->p_fd = fdinit(); 577 p->p_fdtol = NULL; 578 579 /* Create the limits structures. */ 580 p->p_limit = lim_alloc(); 581 for (i = 0; i < RLIM_NLIMITS; i++) 582 p->p_limit->pl_rlimit[i].rlim_cur = 583 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 584 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 585 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 586 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 587 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 588 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 589 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 590 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 591 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 592 /* Cast to avoid overflow on i386/PAE. */ 593 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 594 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 595 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 596 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 597 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 598 p->p_cpulimit = RLIM_INFINITY; 599 600 PROC_LOCK(p); 601 thread_cow_get_proc(td, p); 602 PROC_UNLOCK(p); 603 604 /* Initialize resource accounting structures. */ 605 racct_create(&p->p_racct); 606 607 p->p_stats = pstats_alloc(); 608 609 /* Allocate a prototype map so we have something to fork. */ 610 p->p_vmspace = &vmspace0; 611 refcount_init(&vmspace0.vm_refcnt, 1); 612 pmap_pinit0(vmspace_pmap(&vmspace0)); 613 614 /* 615 * proc0 is not expected to enter usermode, so there is no special 616 * handling for sv_minuser here, like is done for exec_new_vmspace(). 617 */ 618 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 619 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 620 621 /* 622 * Call the init and ctor for the new thread and proc. We wait 623 * to do this until all other structures are fairly sane. 624 */ 625 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 626 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 627 #ifdef KDTRACE_HOOKS 628 kdtrace_proc_ctor(p); 629 kdtrace_thread_ctor(td); 630 #endif 631 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 632 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 633 634 /* 635 * Charge root for one process. 636 */ 637 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 638 PROC_LOCK(p); 639 racct_add_force(p, RACCT_NPROC, 1); 640 PROC_UNLOCK(p); 641 } 642 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 643 644 /* ARGSUSED*/ 645 static void 646 proc0_post(void *dummy __unused) 647 { 648 struct proc *p; 649 struct rusage ru; 650 struct thread *td; 651 652 /* 653 * Now we can look at the time, having had a chance to verify the 654 * time from the filesystem. Pretend that proc0 started now. 655 */ 656 sx_slock(&allproc_lock); 657 FOREACH_PROC_IN_SYSTEM(p) { 658 PROC_LOCK(p); 659 if (p->p_state == PRS_NEW) { 660 PROC_UNLOCK(p); 661 continue; 662 } 663 microuptime(&p->p_stats->p_start); 664 PROC_STATLOCK(p); 665 rufetch(p, &ru); /* Clears thread stats */ 666 p->p_rux.rux_runtime = 0; 667 p->p_rux.rux_uticks = 0; 668 p->p_rux.rux_sticks = 0; 669 p->p_rux.rux_iticks = 0; 670 PROC_STATUNLOCK(p); 671 FOREACH_THREAD_IN_PROC(p, td) { 672 td->td_runtime = 0; 673 } 674 PROC_UNLOCK(p); 675 } 676 sx_sunlock(&allproc_lock); 677 PCPU_SET(switchtime, cpu_ticks()); 678 PCPU_SET(switchticks, ticks); 679 } 680 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 681 682 /* 683 *************************************************************************** 684 **** 685 **** The following SYSINIT's and glue code should be moved to the 686 **** respective files on a per subsystem basis. 687 **** 688 *************************************************************************** 689 */ 690 691 /* 692 * List of paths to try when searching for "init". 693 */ 694 static char init_path[MAXPATHLEN] = 695 #ifdef INIT_PATH 696 __XSTRING(INIT_PATH); 697 #else 698 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 699 #endif 700 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 701 "Path used to search the init process"); 702 703 /* 704 * Shutdown timeout of init(8). 705 * Unused within kernel, but used to control init(8), hence do not remove. 706 */ 707 #ifndef INIT_SHUTDOWN_TIMEOUT 708 #define INIT_SHUTDOWN_TIMEOUT 120 709 #endif 710 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 711 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 712 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 713 "Unused within kernel, but used to control init(8)"); 714 715 /* 716 * Start the initial user process; try exec'ing each pathname in init_path. 717 * The program is invoked with one argument containing the boot flags. 718 */ 719 static void 720 start_init(void *dummy) 721 { 722 struct image_args args; 723 int error; 724 char *var, *path; 725 char *free_init_path, *tmp_init_path; 726 struct thread *td; 727 struct proc *p; 728 struct vmspace *oldvmspace; 729 730 TSENTER(); /* Here so we don't overlap with mi_startup. */ 731 732 td = curthread; 733 p = td->td_proc; 734 735 vfs_mountroot(); 736 737 /* Wipe GELI passphrase from the environment. */ 738 kern_unsetenv("kern.geom.eli.passphrase"); 739 740 /* For Multicons, report which console is primary to both */ 741 if (boothowto & RB_MULTIPLE) { 742 if (boothowto & RB_SERIAL) 743 printf("Dual Console: Serial Primary, Video Secondary\n"); 744 else 745 printf("Dual Console: Video Primary, Serial Secondary\n"); 746 } 747 748 if ((var = kern_getenv("init_path")) != NULL) { 749 strlcpy(init_path, var, sizeof(init_path)); 750 freeenv(var); 751 } 752 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 753 754 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 755 if (bootverbose) 756 printf("start_init: trying %s\n", path); 757 758 memset(&args, 0, sizeof(args)); 759 error = exec_alloc_args(&args); 760 if (error != 0) 761 panic("%s: Can't allocate space for init arguments %d", 762 __func__, error); 763 764 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 765 if (error != 0) 766 panic("%s: Can't add fname %d", __func__, error); 767 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 768 if (error != 0) 769 panic("%s: Can't add argv[0] %d", __func__, error); 770 if (boothowto & RB_SINGLE) 771 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 772 if (error != 0) 773 panic("%s: Can't add argv[0] %d", __func__, error); 774 775 /* 776 * Now try to exec the program. If can't for any reason 777 * other than it doesn't exist, complain. 778 * 779 * Otherwise, return via fork_trampoline() all the way 780 * to user mode as init! 781 */ 782 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 783 ("nested execve")); 784 oldvmspace = p->p_vmspace; 785 error = kern_execve(td, &args, NULL, oldvmspace); 786 KASSERT(error != 0, 787 ("kern_execve returned success, not EJUSTRETURN")); 788 if (error == EJUSTRETURN) { 789 exec_cleanup(td, oldvmspace); 790 free(free_init_path, M_TEMP); 791 TSEXIT(); 792 return; 793 } 794 if (error != ENOENT) 795 printf("exec %s: error %d\n", path, error); 796 } 797 free(free_init_path, M_TEMP); 798 printf("init: not found in path %s\n", init_path); 799 panic("no init"); 800 } 801 802 /* 803 * Like kproc_create(), but runs in its own address space. We do this 804 * early to reserve pid 1. Note special case - do not make it 805 * runnable yet, init execution is started when userspace can be served. 806 */ 807 static void 808 create_init(const void *udata __unused) 809 { 810 struct fork_req fr; 811 struct ucred *newcred, *oldcred; 812 struct thread *td; 813 int error; 814 815 bzero(&fr, sizeof(fr)); 816 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 817 fr.fr_procp = &initproc; 818 error = fork1(&thread0, &fr); 819 if (error) 820 panic("cannot fork init: %d\n", error); 821 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 822 /* divorce init's credentials from the kernel's */ 823 newcred = crget(); 824 sx_xlock(&proctree_lock); 825 PROC_LOCK(initproc); 826 initproc->p_flag |= P_SYSTEM | P_INMEM; 827 initproc->p_treeflag |= P_TREE_REAPER; 828 oldcred = initproc->p_ucred; 829 crcopy(newcred, oldcred); 830 #ifdef MAC 831 mac_cred_create_init(newcred); 832 #endif 833 #ifdef AUDIT 834 audit_cred_proc1(newcred); 835 #endif 836 proc_set_cred(initproc, newcred); 837 td = FIRST_THREAD_IN_PROC(initproc); 838 crcowfree(td); 839 td->td_realucred = crcowget(initproc->p_ucred); 840 td->td_ucred = td->td_realucred; 841 PROC_UNLOCK(initproc); 842 sx_xunlock(&proctree_lock); 843 crfree(oldcred); 844 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 845 start_init, NULL); 846 } 847 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 848 849 /* 850 * Make it runnable now. 851 */ 852 static void 853 kick_init(const void *udata __unused) 854 { 855 struct thread *td; 856 857 td = FIRST_THREAD_IN_PROC(initproc); 858 thread_lock(td); 859 TD_SET_CAN_RUN(td); 860 sched_add(td, SRQ_BORING); 861 } 862 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 863 864 /* 865 * DDB(4). 866 */ 867 #ifdef DDB 868 static void 869 db_show_print_syinit(struct sysinit *sip, bool ddb) 870 { 871 const char *sname, *funcname; 872 c_db_sym_t sym; 873 db_expr_t offset; 874 875 #define xprint(...) \ 876 if (ddb) \ 877 db_printf(__VA_ARGS__); \ 878 else \ 879 printf(__VA_ARGS__) 880 881 if (sip == NULL) { 882 xprint("%s: no sysinit * given\n", __func__); 883 return; 884 } 885 886 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 887 db_symbol_values(sym, &sname, NULL); 888 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 889 db_symbol_values(sym, &funcname, NULL); 890 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 891 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 892 xprint(" %p(%s)(%p)\n", 893 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 894 #undef xprint 895 } 896 897 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 898 { 899 struct sysinit **sipp; 900 901 db_printf("SYSINIT vs Name(Ptr)\n"); 902 db_printf(" Subsystem Order\n"); 903 db_printf(" Function(Name)(Arg)\n"); 904 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 905 db_show_print_syinit(*sipp, true); 906 if (db_pager_quit) 907 break; 908 } 909 } 910 #endif /* DDB */ 911