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 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 259 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 260 if ((*sipp)->subsystem < (*xipp)->subsystem || 261 ((*sipp)->subsystem == (*xipp)->subsystem && 262 (*sipp)->order <= (*xipp)->order)) 263 continue; /* skip*/ 264 save = *sipp; 265 *sipp = *xipp; 266 *xipp = save; 267 } 268 } 269 270 last = SI_SUB_COPYRIGHT; 271 #if defined(VERBOSE_SYSINIT) 272 verbose = 0; 273 #if !defined(DDB) 274 printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n"); 275 #endif 276 #endif 277 278 /* 279 * Traverse the (now) ordered list of system initialization tasks. 280 * Perform each task, and continue on to the next task. 281 */ 282 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 283 if ((*sipp)->subsystem == SI_SUB_DUMMY) 284 continue; /* skip dummy task(s)*/ 285 286 if ((*sipp)->subsystem == SI_SUB_DONE) 287 continue; 288 289 if ((*sipp)->subsystem > last) 290 BOOTTRACE_INIT("sysinit 0x%7x", (*sipp)->subsystem); 291 292 #if defined(VERBOSE_SYSINIT) 293 if ((*sipp)->subsystem > last && verbose_sysinit != 0) { 294 verbose = 1; 295 printf("subsystem %x\n", last); 296 } 297 if (verbose) { 298 #if defined(DDB) 299 const char *func, *data; 300 301 func = symbol_name((vm_offset_t)(*sipp)->func, 302 DB_STGY_PROC); 303 data = symbol_name((vm_offset_t)(*sipp)->udata, 304 DB_STGY_ANY); 305 if (func != NULL && data != NULL) 306 printf(" %s(&%s)... ", func, data); 307 else if (func != NULL) 308 printf(" %s(%p)... ", func, (*sipp)->udata); 309 else 310 #endif 311 printf(" %p(%p)... ", (*sipp)->func, 312 (*sipp)->udata); 313 } 314 #endif 315 316 /* Call function */ 317 (*((*sipp)->func))((*sipp)->udata); 318 319 #if defined(VERBOSE_SYSINIT) 320 if (verbose) 321 printf("done.\n"); 322 #endif 323 324 /* Check off the one we're just done */ 325 last = (*sipp)->subsystem; 326 (*sipp)->subsystem = SI_SUB_DONE; 327 328 /* Check if we've installed more sysinit items via KLD */ 329 if (newsysinit != NULL) { 330 if (sysinit != SET_BEGIN(sysinit_set)) 331 free(sysinit, M_TEMP); 332 sysinit = newsysinit; 333 sysinit_end = newsysinit_end; 334 newsysinit = NULL; 335 newsysinit_end = NULL; 336 goto restart; 337 } 338 } 339 340 TSEXIT(); /* Here so we don't overlap with start_init. */ 341 BOOTTRACE("mi_startup done"); 342 343 mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED); 344 mtx_unlock(&Giant); 345 346 /* 347 * Now hand over this thread to swapper. 348 */ 349 swapper(); 350 /* NOTREACHED*/ 351 } 352 353 static void 354 print_caddr_t(void *data) 355 { 356 printf("%s", (char *)data); 357 } 358 359 static void 360 print_version(void *data __unused) 361 { 362 int len; 363 364 /* Strip a trailing newline from version. */ 365 len = strlen(version); 366 while (len > 0 && version[len - 1] == '\n') 367 len--; 368 printf("%.*s %s\n", len, version, machine); 369 printf("%s\n", compiler_version); 370 } 371 372 SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, 373 copyright); 374 SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, 375 trademark); 376 SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL); 377 378 #ifdef WITNESS 379 static char wit_warn[] = 380 "WARNING: WITNESS option enabled, expect reduced performance.\n"; 381 SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_FOURTH, 382 print_caddr_t, wit_warn); 383 SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH, 384 print_caddr_t, wit_warn); 385 #endif 386 387 #ifdef DIAGNOSTIC 388 static char diag_warn[] = 389 "WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n"; 390 SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_FIFTH, 391 print_caddr_t, diag_warn); 392 SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH, 393 print_caddr_t, diag_warn); 394 #endif 395 396 static int 397 null_fetch_syscall_args(struct thread *td __unused) 398 { 399 400 panic("null_fetch_syscall_args"); 401 } 402 403 static void 404 null_set_syscall_retval(struct thread *td __unused, int error __unused) 405 { 406 407 panic("null_set_syscall_retval"); 408 } 409 410 static void 411 null_set_fork_retval(struct thread *td __unused) 412 { 413 414 } 415 416 struct sysentvec null_sysvec = { 417 .sv_size = 0, 418 .sv_table = NULL, 419 .sv_fixup = NULL, 420 .sv_sendsig = NULL, 421 .sv_sigcode = NULL, 422 .sv_szsigcode = NULL, 423 .sv_name = "null", 424 .sv_coredump = NULL, 425 .sv_imgact_try = NULL, 426 .sv_minsigstksz = 0, 427 .sv_minuser = VM_MIN_ADDRESS, 428 .sv_maxuser = VM_MAXUSER_ADDRESS, 429 .sv_usrstack = USRSTACK, 430 .sv_psstrings = PS_STRINGS, 431 .sv_psstringssz = sizeof(struct ps_strings), 432 .sv_stackprot = VM_PROT_ALL, 433 .sv_copyout_strings = NULL, 434 .sv_setregs = NULL, 435 .sv_fixlimit = NULL, 436 .sv_maxssiz = NULL, 437 .sv_flags = 0, 438 .sv_set_syscall_retval = null_set_syscall_retval, 439 .sv_fetch_syscall_args = null_fetch_syscall_args, 440 .sv_syscallnames = NULL, 441 .sv_schedtail = NULL, 442 .sv_thread_detach = NULL, 443 .sv_trap = NULL, 444 .sv_set_fork_retval = null_set_fork_retval, 445 .sv_regset_begin = NULL, 446 .sv_regset_end = NULL, 447 }; 448 449 /* 450 * The two following SYSINIT's are proc0 specific glue code. I am not 451 * convinced that they can not be safely combined, but their order of 452 * operation has been maintained as the same as the original init_main.c 453 * for right now. 454 */ 455 /* ARGSUSED*/ 456 static void 457 proc0_init(void *dummy __unused) 458 { 459 struct proc *p; 460 struct thread *td; 461 struct ucred *newcred; 462 struct uidinfo tmpuinfo; 463 struct loginclass tmplc = { 464 .lc_name = "", 465 }; 466 vm_paddr_t pageablemem; 467 int i; 468 469 GIANT_REQUIRED; 470 p = &proc0; 471 td = &thread0; 472 473 /* 474 * Initialize magic number and osrel. 475 */ 476 p->p_magic = P_MAGIC; 477 p->p_osrel = osreldate; 478 479 /* 480 * Initialize thread and process structures. 481 */ 482 procinit(); /* set up proc zone */ 483 threadinit(); /* set up UMA zones */ 484 485 /* 486 * Initialise scheduler resources. 487 * Add scheduler specific parts to proc, thread as needed. 488 */ 489 schedinit(); /* scheduler gets its house in order */ 490 491 /* 492 * Create process 0 (the swapper). 493 */ 494 LIST_INSERT_HEAD(&allproc, p, p_list); 495 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 496 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 497 p->p_pgrp = &pgrp0; 498 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 499 LIST_INIT(&pgrp0.pg_members); 500 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 501 502 pgrp0.pg_session = &session0; 503 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 504 refcount_init(&session0.s_count, 1); 505 session0.s_leader = p; 506 507 p->p_sysent = &null_sysvec; 508 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 509 p->p_flag2 = 0; 510 p->p_state = PRS_NORMAL; 511 p->p_klist = knlist_alloc(&p->p_mtx); 512 STAILQ_INIT(&p->p_ktr); 513 p->p_nice = NZERO; 514 td->td_tid = THREAD0_TID; 515 tidhash_add(td); 516 TD_SET_STATE(td, TDS_RUNNING); 517 td->td_pri_class = PRI_TIMESHARE; 518 td->td_user_pri = PUSER; 519 td->td_base_user_pri = PUSER; 520 td->td_lend_user_pri = PRI_MAX; 521 td->td_priority = PVM; 522 td->td_base_pri = PVM; 523 td->td_oncpu = curcpu; 524 td->td_flags = TDF_INMEM; 525 td->td_pflags = TDP_KTHREAD; 526 td->td_cpuset = cpuset_thread0(); 527 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 528 prison0_init(); 529 p->p_peers = 0; 530 p->p_leader = p; 531 p->p_reaper = p; 532 p->p_treeflag |= P_TREE_REAPER; 533 LIST_INIT(&p->p_reaplist); 534 535 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 536 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 537 538 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 539 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 540 callout_init(&td->td_slpcallout, 1); 541 TAILQ_INIT(&p->p_kqtim_stop); 542 543 /* Create credentials. */ 544 newcred = crget(); 545 newcred->cr_ngroups = 1; /* group 0 */ 546 /* A hack to prevent uifind from tripping over NULL pointers. */ 547 curthread->td_ucred = newcred; 548 tmpuinfo.ui_uid = 1; 549 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 550 newcred->cr_uidinfo = uifind(0); 551 newcred->cr_ruidinfo = uifind(0); 552 newcred->cr_loginclass = &tmplc; 553 newcred->cr_loginclass = loginclass_find("default"); 554 /* End hack. creds get properly set later with thread_cow_get_proc */ 555 curthread->td_ucred = NULL; 556 newcred->cr_prison = &prison0; 557 newcred->cr_users++; /* avoid assertion failure */ 558 proc_set_cred_init(p, newcred); 559 newcred->cr_users--; 560 crfree(newcred); 561 #ifdef AUDIT 562 audit_cred_kproc0(newcred); 563 #endif 564 #ifdef MAC 565 mac_cred_create_swapper(newcred); 566 #endif 567 /* Create sigacts. */ 568 p->p_sigacts = sigacts_alloc(); 569 570 /* Initialize signal state for process 0. */ 571 siginit(&proc0); 572 573 /* Create the file descriptor table. */ 574 p->p_pd = pdinit(NULL, false); 575 p->p_fd = fdinit(); 576 p->p_fdtol = NULL; 577 578 /* Create the limits structures. */ 579 p->p_limit = lim_alloc(); 580 for (i = 0; i < RLIM_NLIMITS; i++) 581 p->p_limit->pl_rlimit[i].rlim_cur = 582 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 583 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 584 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 585 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 586 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 587 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 588 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 589 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 590 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 591 /* Cast to avoid overflow on i386/PAE. */ 592 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 593 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 594 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 595 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 596 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 597 p->p_cpulimit = RLIM_INFINITY; 598 599 PROC_LOCK(p); 600 thread_cow_get_proc(td, p); 601 PROC_UNLOCK(p); 602 603 /* Initialize resource accounting structures. */ 604 racct_create(&p->p_racct); 605 606 p->p_stats = pstats_alloc(); 607 608 /* Allocate a prototype map so we have something to fork. */ 609 p->p_vmspace = &vmspace0; 610 refcount_init(&vmspace0.vm_refcnt, 1); 611 pmap_pinit0(vmspace_pmap(&vmspace0)); 612 613 /* 614 * proc0 is not expected to enter usermode, so there is no special 615 * handling for sv_minuser here, like is done for exec_new_vmspace(). 616 */ 617 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 618 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 619 620 /* 621 * Call the init and ctor for the new thread and proc. We wait 622 * to do this until all other structures are fairly sane. 623 */ 624 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 625 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 626 #ifdef KDTRACE_HOOKS 627 kdtrace_proc_ctor(p); 628 kdtrace_thread_ctor(td); 629 #endif 630 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 631 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 632 633 /* 634 * Charge root for one process. 635 */ 636 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 637 PROC_LOCK(p); 638 racct_add_force(p, RACCT_NPROC, 1); 639 PROC_UNLOCK(p); 640 } 641 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 642 643 /* ARGSUSED*/ 644 static void 645 proc0_post(void *dummy __unused) 646 { 647 struct proc *p; 648 struct rusage ru; 649 struct thread *td; 650 651 /* 652 * Now we can look at the time, having had a chance to verify the 653 * time from the filesystem. Pretend that proc0 started now. 654 */ 655 sx_slock(&allproc_lock); 656 FOREACH_PROC_IN_SYSTEM(p) { 657 PROC_LOCK(p); 658 if (p->p_state == PRS_NEW) { 659 PROC_UNLOCK(p); 660 continue; 661 } 662 microuptime(&p->p_stats->p_start); 663 PROC_STATLOCK(p); 664 rufetch(p, &ru); /* Clears thread stats */ 665 p->p_rux.rux_runtime = 0; 666 p->p_rux.rux_uticks = 0; 667 p->p_rux.rux_sticks = 0; 668 p->p_rux.rux_iticks = 0; 669 PROC_STATUNLOCK(p); 670 FOREACH_THREAD_IN_PROC(p, td) { 671 td->td_runtime = 0; 672 } 673 PROC_UNLOCK(p); 674 } 675 sx_sunlock(&allproc_lock); 676 PCPU_SET(switchtime, cpu_ticks()); 677 PCPU_SET(switchticks, ticks); 678 } 679 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 680 681 /* 682 *************************************************************************** 683 **** 684 **** The following SYSINIT's and glue code should be moved to the 685 **** respective files on a per subsystem basis. 686 **** 687 *************************************************************************** 688 */ 689 690 /* 691 * List of paths to try when searching for "init". 692 */ 693 static char init_path[MAXPATHLEN] = 694 #ifdef INIT_PATH 695 __XSTRING(INIT_PATH); 696 #else 697 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 698 #endif 699 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 700 "Path used to search the init process"); 701 702 /* 703 * Shutdown timeout of init(8). 704 * Unused within kernel, but used to control init(8), hence do not remove. 705 */ 706 #ifndef INIT_SHUTDOWN_TIMEOUT 707 #define INIT_SHUTDOWN_TIMEOUT 120 708 #endif 709 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 710 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 711 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 712 "Unused within kernel, but used to control init(8)"); 713 714 /* 715 * Start the initial user process; try exec'ing each pathname in init_path. 716 * The program is invoked with one argument containing the boot flags. 717 */ 718 static void 719 start_init(void *dummy) 720 { 721 struct image_args args; 722 int error; 723 char *var, *path; 724 char *free_init_path, *tmp_init_path; 725 struct thread *td; 726 struct proc *p; 727 struct vmspace *oldvmspace; 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 /* For Multicons, report which console is primary to both */ 740 if (boothowto & RB_MULTIPLE) { 741 if (boothowto & RB_SERIAL) 742 printf("Dual Console: Serial Primary, Video Secondary\n"); 743 else 744 printf("Dual Console: Video Primary, Serial Secondary\n"); 745 } 746 747 if ((var = kern_getenv("init_path")) != NULL) { 748 strlcpy(init_path, var, sizeof(init_path)); 749 freeenv(var); 750 } 751 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 752 753 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 754 if (bootverbose) 755 printf("start_init: trying %s\n", path); 756 757 memset(&args, 0, sizeof(args)); 758 error = exec_alloc_args(&args); 759 if (error != 0) 760 panic("%s: Can't allocate space for init arguments %d", 761 __func__, error); 762 763 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 764 if (error != 0) 765 panic("%s: Can't add fname %d", __func__, error); 766 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 767 if (error != 0) 768 panic("%s: Can't add argv[0] %d", __func__, error); 769 if (boothowto & RB_SINGLE) 770 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 771 if (error != 0) 772 panic("%s: Can't add argv[0] %d", __func__, error); 773 774 /* 775 * Now try to exec the program. If can't for any reason 776 * other than it doesn't exist, complain. 777 * 778 * Otherwise, return via fork_trampoline() all the way 779 * to user mode as init! 780 */ 781 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 782 ("nested execve")); 783 oldvmspace = p->p_vmspace; 784 error = kern_execve(td, &args, NULL, oldvmspace); 785 KASSERT(error != 0, 786 ("kern_execve returned success, not EJUSTRETURN")); 787 if (error == EJUSTRETURN) { 788 exec_cleanup(td, oldvmspace); 789 free(free_init_path, M_TEMP); 790 TSEXIT(); 791 return; 792 } 793 if (error != ENOENT) 794 printf("exec %s: error %d\n", path, error); 795 } 796 free(free_init_path, M_TEMP); 797 printf("init: not found in path %s\n", init_path); 798 panic("no init"); 799 } 800 801 /* 802 * Like kproc_create(), but runs in its own address space. We do this 803 * early to reserve pid 1. Note special case - do not make it 804 * runnable yet, init execution is started when userspace can be served. 805 */ 806 static void 807 create_init(const void *udata __unused) 808 { 809 struct fork_req fr; 810 struct ucred *newcred, *oldcred; 811 struct thread *td; 812 int error; 813 814 bzero(&fr, sizeof(fr)); 815 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 816 fr.fr_procp = &initproc; 817 error = fork1(&thread0, &fr); 818 if (error) 819 panic("cannot fork init: %d\n", error); 820 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 821 /* divorce init's credentials from the kernel's */ 822 newcred = crget(); 823 sx_xlock(&proctree_lock); 824 PROC_LOCK(initproc); 825 initproc->p_flag |= P_SYSTEM | P_INMEM; 826 initproc->p_treeflag |= P_TREE_REAPER; 827 oldcred = initproc->p_ucred; 828 crcopy(newcred, oldcred); 829 #ifdef MAC 830 mac_cred_create_init(newcred); 831 #endif 832 #ifdef AUDIT 833 audit_cred_proc1(newcred); 834 #endif 835 proc_set_cred(initproc, newcred); 836 td = FIRST_THREAD_IN_PROC(initproc); 837 crcowfree(td); 838 td->td_realucred = crcowget(initproc->p_ucred); 839 td->td_ucred = td->td_realucred; 840 PROC_UNLOCK(initproc); 841 sx_xunlock(&proctree_lock); 842 crfree(oldcred); 843 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 844 start_init, NULL); 845 } 846 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 847 848 /* 849 * Make it runnable now. 850 */ 851 static void 852 kick_init(const void *udata __unused) 853 { 854 struct thread *td; 855 856 td = FIRST_THREAD_IN_PROC(initproc); 857 thread_lock(td); 858 TD_SET_CAN_RUN(td); 859 sched_add(td, SRQ_BORING); 860 } 861 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 862 863 /* 864 * DDB(4). 865 */ 866 #ifdef DDB 867 static void 868 db_show_print_syinit(struct sysinit *sip, bool ddb) 869 { 870 const char *sname, *funcname; 871 c_db_sym_t sym; 872 db_expr_t offset; 873 874 #define xprint(...) \ 875 if (ddb) \ 876 db_printf(__VA_ARGS__); \ 877 else \ 878 printf(__VA_ARGS__) 879 880 if (sip == NULL) { 881 xprint("%s: no sysinit * given\n", __func__); 882 return; 883 } 884 885 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 886 db_symbol_values(sym, &sname, NULL); 887 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 888 db_symbol_values(sym, &funcname, NULL); 889 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 890 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 891 xprint(" %p(%s)(%p)\n", 892 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 893 #undef xprint 894 } 895 896 DB_SHOW_COMMAND_FLAGS(sysinit, db_show_sysinit, DB_CMD_MEMSAFE) 897 { 898 struct sysinit **sipp; 899 900 db_printf("SYSINIT vs Name(Ptr)\n"); 901 db_printf(" Subsystem Order\n"); 902 db_printf(" Function(Name)(Arg)\n"); 903 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 904 db_show_print_syinit(*sipp, true); 905 if (db_pager_quit) 906 break; 907 } 908 } 909 #endif /* DDB */ 910