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 static void 406 null_set_fork_retval(struct thread *td __unused) 407 { 408 409 } 410 411 struct sysentvec null_sysvec = { 412 .sv_size = 0, 413 .sv_table = NULL, 414 .sv_transtrap = NULL, 415 .sv_fixup = NULL, 416 .sv_sendsig = NULL, 417 .sv_sigcode = NULL, 418 .sv_szsigcode = NULL, 419 .sv_name = "null", 420 .sv_coredump = NULL, 421 .sv_imgact_try = NULL, 422 .sv_minsigstksz = 0, 423 .sv_minuser = VM_MIN_ADDRESS, 424 .sv_maxuser = VM_MAXUSER_ADDRESS, 425 .sv_usrstack = USRSTACK, 426 .sv_psstrings = PS_STRINGS, 427 .sv_stackprot = VM_PROT_ALL, 428 .sv_copyout_strings = NULL, 429 .sv_setregs = NULL, 430 .sv_fixlimit = NULL, 431 .sv_maxssiz = NULL, 432 .sv_flags = 0, 433 .sv_set_syscall_retval = null_set_syscall_retval, 434 .sv_fetch_syscall_args = null_fetch_syscall_args, 435 .sv_syscallnames = NULL, 436 .sv_schedtail = NULL, 437 .sv_thread_detach = NULL, 438 .sv_trap = NULL, 439 .sv_set_fork_retval = null_set_fork_retval, 440 }; 441 442 /* 443 * The two following SYSINIT's are proc0 specific glue code. I am not 444 * convinced that they can not be safely combined, but their order of 445 * operation has been maintained as the same as the original init_main.c 446 * for right now. 447 */ 448 /* ARGSUSED*/ 449 static void 450 proc0_init(void *dummy __unused) 451 { 452 struct proc *p; 453 struct thread *td; 454 struct ucred *newcred; 455 struct uidinfo tmpuinfo; 456 struct loginclass tmplc = { 457 .lc_name = "", 458 }; 459 vm_paddr_t pageablemem; 460 int i; 461 462 GIANT_REQUIRED; 463 p = &proc0; 464 td = &thread0; 465 466 /* 467 * Initialize magic number and osrel. 468 */ 469 p->p_magic = P_MAGIC; 470 p->p_osrel = osreldate; 471 472 /* 473 * Initialize thread and process structures. 474 */ 475 procinit(); /* set up proc zone */ 476 threadinit(); /* set up UMA zones */ 477 478 /* 479 * Initialise scheduler resources. 480 * Add scheduler specific parts to proc, thread as needed. 481 */ 482 schedinit(); /* scheduler gets its house in order */ 483 484 /* 485 * Create process 0 (the swapper). 486 */ 487 LIST_INSERT_HEAD(&allproc, p, p_list); 488 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 489 mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 490 p->p_pgrp = &pgrp0; 491 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 492 LIST_INIT(&pgrp0.pg_members); 493 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 494 495 pgrp0.pg_session = &session0; 496 mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF); 497 refcount_init(&session0.s_count, 1); 498 session0.s_leader = p; 499 500 p->p_sysent = &null_sysvec; 501 p->p_flag = P_SYSTEM | P_INMEM | P_KPROC; 502 p->p_flag2 = 0; 503 p->p_state = PRS_NORMAL; 504 p->p_klist = knlist_alloc(&p->p_mtx); 505 STAILQ_INIT(&p->p_ktr); 506 p->p_nice = NZERO; 507 td->td_tid = THREAD0_TID; 508 tidhash_add(td); 509 TD_SET_STATE(td, TDS_RUNNING); 510 td->td_pri_class = PRI_TIMESHARE; 511 td->td_user_pri = PUSER; 512 td->td_base_user_pri = PUSER; 513 td->td_lend_user_pri = PRI_MAX; 514 td->td_priority = PVM; 515 td->td_base_pri = PVM; 516 td->td_oncpu = curcpu; 517 td->td_flags = TDF_INMEM; 518 td->td_pflags = TDP_KTHREAD; 519 td->td_cpuset = cpuset_thread0(); 520 td->td_domain.dr_policy = td->td_cpuset->cs_domain; 521 prison0_init(); 522 p->p_peers = 0; 523 p->p_leader = p; 524 p->p_reaper = p; 525 p->p_treeflag |= P_TREE_REAPER; 526 LIST_INIT(&p->p_reaplist); 527 528 strncpy(p->p_comm, "kernel", sizeof (p->p_comm)); 529 strncpy(td->td_name, "swapper", sizeof (td->td_name)); 530 531 callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0); 532 callout_init_mtx(&p->p_limco, &p->p_mtx, 0); 533 callout_init(&td->td_slpcallout, 1); 534 TAILQ_INIT(&p->p_kqtim_stop); 535 536 /* Create credentials. */ 537 newcred = crget(); 538 newcred->cr_ngroups = 1; /* group 0 */ 539 /* A hack to prevent uifind from tripping over NULL pointers. */ 540 curthread->td_ucred = newcred; 541 tmpuinfo.ui_uid = 1; 542 newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo; 543 newcred->cr_uidinfo = uifind(0); 544 newcred->cr_ruidinfo = uifind(0); 545 newcred->cr_loginclass = &tmplc; 546 newcred->cr_loginclass = loginclass_find("default"); 547 /* End hack. creds get properly set later with thread_cow_get_proc */ 548 curthread->td_ucred = NULL; 549 newcred->cr_prison = &prison0; 550 newcred->cr_users++; /* avoid assertion failure */ 551 proc_set_cred_init(p, newcred); 552 newcred->cr_users--; 553 crfree(newcred); 554 #ifdef AUDIT 555 audit_cred_kproc0(newcred); 556 #endif 557 #ifdef MAC 558 mac_cred_create_swapper(newcred); 559 #endif 560 /* Create sigacts. */ 561 p->p_sigacts = sigacts_alloc(); 562 563 /* Initialize signal state for process 0. */ 564 siginit(&proc0); 565 566 /* Create the file descriptor table. */ 567 p->p_pd = pdinit(NULL, false); 568 p->p_fd = fdinit(NULL, false, NULL); 569 p->p_fdtol = NULL; 570 571 /* Create the limits structures. */ 572 p->p_limit = lim_alloc(); 573 for (i = 0; i < RLIM_NLIMITS; i++) 574 p->p_limit->pl_rlimit[i].rlim_cur = 575 p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY; 576 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur = 577 p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 578 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur = 579 p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 580 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz; 581 p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz; 582 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz; 583 p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz; 584 /* Cast to avoid overflow on i386/PAE. */ 585 pageablemem = ptoa((vm_paddr_t)vm_free_count()); 586 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur = 587 p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem; 588 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3; 589 p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem; 590 p->p_cpulimit = RLIM_INFINITY; 591 592 PROC_LOCK(p); 593 thread_cow_get_proc(td, p); 594 PROC_UNLOCK(p); 595 596 /* Initialize resource accounting structures. */ 597 racct_create(&p->p_racct); 598 599 p->p_stats = pstats_alloc(); 600 601 /* Allocate a prototype map so we have something to fork. */ 602 p->p_vmspace = &vmspace0; 603 refcount_init(&vmspace0.vm_refcnt, 1); 604 pmap_pinit0(vmspace_pmap(&vmspace0)); 605 606 /* 607 * proc0 is not expected to enter usermode, so there is no special 608 * handling for sv_minuser here, like is done for exec_new_vmspace(). 609 */ 610 vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0), 611 p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser); 612 613 /* 614 * Call the init and ctor for the new thread and proc. We wait 615 * to do this until all other structures are fairly sane. 616 */ 617 EVENTHANDLER_DIRECT_INVOKE(process_init, p); 618 EVENTHANDLER_DIRECT_INVOKE(thread_init, td); 619 #ifdef KDTRACE_HOOKS 620 kdtrace_proc_ctor(p); 621 kdtrace_thread_ctor(td); 622 #endif 623 EVENTHANDLER_DIRECT_INVOKE(process_ctor, p); 624 EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td); 625 626 /* 627 * Charge root for one process. 628 */ 629 (void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0); 630 PROC_LOCK(p); 631 racct_add_force(p, RACCT_NPROC, 1); 632 PROC_UNLOCK(p); 633 } 634 SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL); 635 636 /* ARGSUSED*/ 637 static void 638 proc0_post(void *dummy __unused) 639 { 640 struct proc *p; 641 struct rusage ru; 642 struct thread *td; 643 644 /* 645 * Now we can look at the time, having had a chance to verify the 646 * time from the filesystem. Pretend that proc0 started now. 647 */ 648 sx_slock(&allproc_lock); 649 FOREACH_PROC_IN_SYSTEM(p) { 650 PROC_LOCK(p); 651 if (p->p_state == PRS_NEW) { 652 PROC_UNLOCK(p); 653 continue; 654 } 655 microuptime(&p->p_stats->p_start); 656 PROC_STATLOCK(p); 657 rufetch(p, &ru); /* Clears thread stats */ 658 p->p_rux.rux_runtime = 0; 659 p->p_rux.rux_uticks = 0; 660 p->p_rux.rux_sticks = 0; 661 p->p_rux.rux_iticks = 0; 662 PROC_STATUNLOCK(p); 663 FOREACH_THREAD_IN_PROC(p, td) { 664 td->td_runtime = 0; 665 } 666 PROC_UNLOCK(p); 667 } 668 sx_sunlock(&allproc_lock); 669 PCPU_SET(switchtime, cpu_ticks()); 670 PCPU_SET(switchticks, ticks); 671 } 672 SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL); 673 674 /* 675 *************************************************************************** 676 **** 677 **** The following SYSINIT's and glue code should be moved to the 678 **** respective files on a per subsystem basis. 679 **** 680 *************************************************************************** 681 */ 682 683 /* 684 * List of paths to try when searching for "init". 685 */ 686 static char init_path[MAXPATHLEN] = 687 #ifdef INIT_PATH 688 __XSTRING(INIT_PATH); 689 #else 690 "/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init"; 691 #endif 692 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, 693 "Path used to search the init process"); 694 695 /* 696 * Shutdown timeout of init(8). 697 * Unused within kernel, but used to control init(8), hence do not remove. 698 */ 699 #ifndef INIT_SHUTDOWN_TIMEOUT 700 #define INIT_SHUTDOWN_TIMEOUT 120 701 #endif 702 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 703 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 704 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 705 "Unused within kernel, but used to control init(8)"); 706 707 /* 708 * Start the initial user process; try exec'ing each pathname in init_path. 709 * The program is invoked with one argument containing the boot flags. 710 */ 711 static void 712 start_init(void *dummy) 713 { 714 struct image_args args; 715 int error; 716 char *var, *path; 717 char *free_init_path, *tmp_init_path; 718 struct thread *td; 719 struct proc *p; 720 struct vmspace *oldvmspace; 721 722 TSENTER(); /* Here so we don't overlap with mi_startup. */ 723 724 td = curthread; 725 p = td->td_proc; 726 727 vfs_mountroot(); 728 729 /* Wipe GELI passphrase from the environment. */ 730 kern_unsetenv("kern.geom.eli.passphrase"); 731 732 /* For Multicons, report which console is primary to both */ 733 if (boothowto & RB_MULTIPLE) { 734 if (boothowto & RB_SERIAL) 735 printf("Dual Console: Serial Primary, Video Secondary\n"); 736 else 737 printf("Dual Console: Video Primary, Serial Secondary\n"); 738 } 739 740 if ((var = kern_getenv("init_path")) != NULL) { 741 strlcpy(init_path, var, sizeof(init_path)); 742 freeenv(var); 743 } 744 free_init_path = tmp_init_path = strdup(init_path, M_TEMP); 745 746 while ((path = strsep(&tmp_init_path, ":")) != NULL) { 747 if (bootverbose) 748 printf("start_init: trying %s\n", path); 749 750 memset(&args, 0, sizeof(args)); 751 error = exec_alloc_args(&args); 752 if (error != 0) 753 panic("%s: Can't allocate space for init arguments %d", 754 __func__, error); 755 756 error = exec_args_add_fname(&args, path, UIO_SYSSPACE); 757 if (error != 0) 758 panic("%s: Can't add fname %d", __func__, error); 759 error = exec_args_add_arg(&args, path, UIO_SYSSPACE); 760 if (error != 0) 761 panic("%s: Can't add argv[0] %d", __func__, error); 762 if (boothowto & RB_SINGLE) 763 error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE); 764 if (error != 0) 765 panic("%s: Can't add argv[0] %d", __func__, error); 766 767 /* 768 * Now try to exec the program. If can't for any reason 769 * other than it doesn't exist, complain. 770 * 771 * Otherwise, return via fork_trampoline() all the way 772 * to user mode as init! 773 */ 774 KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0, 775 ("nested execve")); 776 oldvmspace = td->td_proc->p_vmspace; 777 error = kern_execve(td, &args, NULL, oldvmspace); 778 KASSERT(error != 0, 779 ("kern_execve returned success, not EJUSTRETURN")); 780 if (error == EJUSTRETURN) { 781 exec_cleanup(td, oldvmspace); 782 free(free_init_path, M_TEMP); 783 TSEXIT(); 784 return; 785 } 786 if (error != ENOENT) 787 printf("exec %s: error %d\n", path, error); 788 } 789 free(free_init_path, M_TEMP); 790 printf("init: not found in path %s\n", init_path); 791 panic("no init"); 792 } 793 794 /* 795 * Like kproc_create(), but runs in its own address space. We do this 796 * early to reserve pid 1. Note special case - do not make it 797 * runnable yet, init execution is started when userspace can be served. 798 */ 799 static void 800 create_init(const void *udata __unused) 801 { 802 struct fork_req fr; 803 struct ucred *newcred, *oldcred; 804 struct thread *td; 805 int error; 806 807 bzero(&fr, sizeof(fr)); 808 fr.fr_flags = RFFDG | RFPROC | RFSTOPPED; 809 fr.fr_procp = &initproc; 810 error = fork1(&thread0, &fr); 811 if (error) 812 panic("cannot fork init: %d\n", error); 813 KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1")); 814 /* divorce init's credentials from the kernel's */ 815 newcred = crget(); 816 sx_xlock(&proctree_lock); 817 PROC_LOCK(initproc); 818 initproc->p_flag |= P_SYSTEM | P_INMEM; 819 initproc->p_treeflag |= P_TREE_REAPER; 820 oldcred = initproc->p_ucred; 821 crcopy(newcred, oldcred); 822 #ifdef MAC 823 mac_cred_create_init(newcred); 824 #endif 825 #ifdef AUDIT 826 audit_cred_proc1(newcred); 827 #endif 828 proc_set_cred(initproc, newcred); 829 td = FIRST_THREAD_IN_PROC(initproc); 830 crcowfree(td); 831 td->td_realucred = crcowget(initproc->p_ucred); 832 td->td_ucred = td->td_realucred; 833 PROC_UNLOCK(initproc); 834 sx_xunlock(&proctree_lock); 835 crfree(oldcred); 836 cpu_fork_kthread_handler(FIRST_THREAD_IN_PROC(initproc), 837 start_init, NULL); 838 } 839 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 840 841 /* 842 * Make it runnable now. 843 */ 844 static void 845 kick_init(const void *udata __unused) 846 { 847 struct thread *td; 848 849 td = FIRST_THREAD_IN_PROC(initproc); 850 thread_lock(td); 851 TD_SET_CAN_RUN(td); 852 sched_add(td, SRQ_BORING); 853 } 854 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL); 855 856 /* 857 * DDB(4). 858 */ 859 #ifdef DDB 860 static void 861 db_show_print_syinit(struct sysinit *sip, bool ddb) 862 { 863 const char *sname, *funcname; 864 c_db_sym_t sym; 865 db_expr_t offset; 866 867 #define xprint(...) \ 868 if (ddb) \ 869 db_printf(__VA_ARGS__); \ 870 else \ 871 printf(__VA_ARGS__) 872 873 if (sip == NULL) { 874 xprint("%s: no sysinit * given\n", __func__); 875 return; 876 } 877 878 sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset); 879 db_symbol_values(sym, &sname, NULL); 880 sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset); 881 db_symbol_values(sym, &funcname, NULL); 882 xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip); 883 xprint(" %#08x %#08x\n", sip->subsystem, sip->order); 884 xprint(" %p(%s)(%p)\n", 885 sip->func, (funcname != NULL) ? funcname : "", sip->udata); 886 #undef xprint 887 } 888 889 DB_SHOW_COMMAND(sysinit, db_show_sysinit) 890 { 891 struct sysinit **sipp; 892 893 db_printf("SYSINIT vs Name(Ptr)\n"); 894 db_printf(" Subsystem Order\n"); 895 db_printf(" Function(Name)(Arg)\n"); 896 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 897 db_show_print_syinit(*sipp, true); 898 if (db_pager_quit) 899 break; 900 } 901 } 902 #endif /* DDB */ 903