1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 #include <sys/types.h> 30 #include <sys/param.h> 31 #include <sys/sysmacros.h> 32 #include <sys/pcb.h> 33 #include <sys/systm.h> 34 #include <sys/signal.h> 35 #include <sys/cred.h> 36 #include <sys/user.h> 37 #include <sys/vfs.h> 38 #include <sys/vnode.h> 39 #include <sys/proc.h> 40 #include <sys/time.h> 41 #include <sys/file.h> 42 #include <sys/priocntl.h> 43 #include <sys/procset.h> 44 #include <sys/disp.h> 45 #include <sys/callo.h> 46 #include <sys/callb.h> 47 #include <sys/debug.h> 48 #include <sys/conf.h> 49 #include <sys/bootconf.h> 50 #include <sys/utsname.h> 51 #include <sys/cmn_err.h> 52 #include <sys/vmparam.h> 53 #include <sys/modctl.h> 54 #include <sys/vm.h> 55 #include <sys/callb.h> 56 #include <sys/ddi_timer.h> 57 #include <sys/kmem.h> 58 #include <sys/vmem.h> 59 #include <sys/cpuvar.h> 60 #include <sys/cladm.h> 61 #include <sys/corectl.h> 62 #include <sys/exec.h> 63 #include <sys/syscall.h> 64 #include <sys/reboot.h> 65 #include <sys/task.h> 66 #include <sys/exacct.h> 67 #include <sys/autoconf.h> 68 #include <sys/errorq.h> 69 #include <sys/class.h> 70 #include <sys/stack.h> 71 #include <sys/brand.h> 72 #include <sys/mmapobj.h> 73 74 #include <vm/as.h> 75 #include <vm/seg_kmem.h> 76 #include <sys/dc_ki.h> 77 78 #include <c2/audit.h> 79 #include <sys/bootprops.h> 80 81 /* well known processes */ 82 proc_t *proc_sched; /* memory scheduler */ 83 proc_t *proc_init; /* init */ 84 proc_t *proc_pageout; /* pageout daemon */ 85 proc_t *proc_fsflush; /* fsflush daemon */ 86 87 pgcnt_t maxmem; /* Maximum available memory in pages. */ 88 pgcnt_t freemem; /* Current available memory in pages. */ 89 int interrupts_unleashed; /* set when we do the first spl0() */ 90 91 kmem_cache_t *process_cache; /* kmem cache for proc structures */ 92 93 /* 94 * Indicates whether the auditing module (c2audit) is loaded. Possible 95 * values are: 96 * 0 - c2audit module is excluded in /etc/system and cannot be loaded 97 * 1 - c2audit module is not loaded but can be anytime 98 * 2 - c2audit module is loaded 99 */ 100 int audit_active = C2AUDIT_DISABLED; 101 102 /* 103 * Process 0's lwp directory and lwpid hash table. 104 */ 105 lwpdir_t p0_lwpdir[2]; 106 tidhash_t p0_tidhash[2]; 107 lwpent_t p0_lep; 108 109 /* 110 * Machine-independent initialization code 111 * Called from cold start routine as 112 * soon as a stack and segmentation 113 * have been established. 114 * Functions: 115 * clear and free user core 116 * turn on clock 117 * hand craft 0th process 118 * call all initialization routines 119 * fork - process 0 to schedule 120 * - process 1 execute bootstrap 121 * - process 2 to page out 122 * create system threads 123 */ 124 125 int cluster_bootflags = 0; 126 127 void 128 cluster_wrapper(void) 129 { 130 cluster(); 131 panic("cluster() returned"); 132 } 133 134 char initname[INITNAME_SZ] = "/sbin/init"; /* also referenced by zone0 */ 135 char initargs[BOOTARGS_MAX] = ""; /* also referenced by zone0 */ 136 137 /* 138 * Construct a stack for init containing the arguments to it, then 139 * pass control to exec_common. 140 */ 141 int 142 exec_init(const char *initpath, const char *args) 143 { 144 caddr32_t ucp; 145 caddr32_t *uap; 146 caddr32_t *argv; 147 caddr32_t exec_fnamep; 148 char *scratchargs; 149 int i, sarg; 150 size_t argvlen, alen; 151 boolean_t in_arg; 152 int argc = 0; 153 int error = 0, count = 0; 154 proc_t *p = ttoproc(curthread); 155 klwp_t *lwp = ttolwp(curthread); 156 int brand_action; 157 158 if (args == NULL) 159 args = ""; 160 161 alen = strlen(initpath) + 1 + strlen(args) + 1; 162 scratchargs = kmem_alloc(alen, KM_SLEEP); 163 (void) snprintf(scratchargs, alen, "%s %s", initpath, args); 164 165 /* 166 * We do a quick two state parse of the string to sort out how big 167 * argc should be. 168 */ 169 in_arg = B_FALSE; 170 for (i = 0; i < strlen(scratchargs); i++) { 171 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 172 if (in_arg) { 173 in_arg = B_FALSE; 174 argc++; 175 } 176 } else { 177 in_arg = B_TRUE; 178 } 179 } 180 argvlen = sizeof (caddr32_t) * (argc + 1); 181 argv = kmem_zalloc(argvlen, KM_SLEEP); 182 183 /* 184 * We pull off a bit of a hack here. We work our way through the 185 * args string, putting nulls at the ends of space delimited tokens 186 * (boot args don't support quoting at this time). Then we just 187 * copy the whole mess to userland in one go. In other words, we 188 * transform this: "init -s -r\0" into this on the stack: 189 * 190 * -0x00 \0 191 * -0x01 r 192 * -0x02 - <--------. 193 * -0x03 \0 | 194 * -0x04 s | 195 * -0x05 - <------. | 196 * -0x06 \0 | | 197 * -0x07 t | | 198 * -0x08 i | | 199 * -0x09 n | | 200 * -0x0a i <---. | | 201 * -0x10 NULL | | | (argv[3]) 202 * -0x14 -----|--|-' (argv[2]) 203 * -0x18 ------|--' (argv[1]) 204 * -0x1c -------' (argv[0]) 205 * 206 * Since we know the value of ucp at the beginning of this process, 207 * we can trivially compute the argv[] array which we also need to 208 * place in userland: argv[i] = ucp - sarg(i), where ucp is the 209 * stack ptr, and sarg is the string index of the start of the 210 * argument. 211 */ 212 ucp = (caddr32_t)(uintptr_t)p->p_usrstack; 213 214 argc = 0; 215 in_arg = B_FALSE; 216 sarg = 0; 217 218 for (i = 0; i < alen; i++) { 219 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 220 if (in_arg == B_TRUE) { 221 in_arg = B_FALSE; 222 scratchargs[i] = '\0'; 223 argv[argc++] = ucp - (alen - sarg); 224 } 225 } else if (in_arg == B_FALSE) { 226 in_arg = B_TRUE; 227 sarg = i; 228 } 229 } 230 ucp -= alen; 231 error |= copyout(scratchargs, (caddr_t)(uintptr_t)ucp, alen); 232 233 uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t)); 234 uap--; /* advance to be below the word we're in */ 235 uap -= (argc + 1); /* advance argc words down, plus one for NULL */ 236 error |= copyout(argv, uap, argvlen); 237 238 if (error != 0) { 239 zcmn_err(p->p_zone->zone_id, CE_WARN, 240 "Could not construct stack for init.\n"); 241 kmem_free(argv, argvlen); 242 kmem_free(scratchargs, alen); 243 return (EFAULT); 244 } 245 246 exec_fnamep = argv[0]; 247 kmem_free(argv, argvlen); 248 kmem_free(scratchargs, alen); 249 250 /* 251 * Point at the arguments. 252 */ 253 lwp->lwp_ap = lwp->lwp_arg; 254 lwp->lwp_arg[0] = (uintptr_t)exec_fnamep; 255 lwp->lwp_arg[1] = (uintptr_t)uap; 256 lwp->lwp_arg[2] = NULL; 257 curthread->t_post_sys = 1; 258 curthread->t_sysnum = SYS_execve; 259 260 /* 261 * If we are executing init from zsched, we may have inherited its 262 * parent process's signal mask. Clear it now so that we behave in 263 * the same way as when started from the global zone. 264 */ 265 sigemptyset(&curthread->t_hold); 266 267 brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE; 268 again: 269 error = exec_common((const char *)(uintptr_t)exec_fnamep, 270 (const char **)(uintptr_t)uap, NULL, brand_action); 271 272 /* 273 * Normally we would just set lwp_argsaved and t_post_sys and 274 * let post_syscall reset lwp_ap for us. Unfortunately, 275 * exec_init isn't always called from a system call. Instead 276 * of making a mess of trap_cleanup, we just reset the args 277 * pointer here. 278 */ 279 reset_syscall_args(); 280 281 switch (error) { 282 case 0: 283 return (0); 284 285 case ENOENT: 286 zcmn_err(p->p_zone->zone_id, CE_WARN, 287 "exec(%s) failed (file not found).\n", initpath); 288 return (ENOENT); 289 290 case EAGAIN: 291 case EINTR: 292 ++count; 293 if (count < 5) { 294 zcmn_err(p->p_zone->zone_id, CE_WARN, 295 "exec(%s) failed with errno %d. Retrying...\n", 296 initpath, error); 297 goto again; 298 } 299 } 300 301 zcmn_err(p->p_zone->zone_id, CE_WARN, 302 "exec(%s) failed with errno %d.", initpath, error); 303 return (error); 304 } 305 306 /* 307 * This routine does all of the common setup for invoking init; global 308 * and non-global zones employ this routine for the functionality which is 309 * in common. 310 * 311 * This program (init, presumably) must be a 32-bit process. 312 */ 313 int 314 start_init_common() 315 { 316 proc_t *p = curproc; 317 ASSERT_STACK_ALIGNED(); 318 p->p_zone->zone_proc_initpid = p->p_pid; 319 320 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; 321 p->p_usrstack = (caddr_t)USRSTACK32; 322 p->p_model = DATAMODEL_ILP32; 323 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; 324 p->p_datprot = PROT_ZFOD & ~PROT_EXEC; 325 p->p_stk_ctl = INT32_MAX; 326 327 p->p_as = as_alloc(); 328 p->p_as->a_proc = p; 329 p->p_as->a_userlimit = (caddr_t)USERLIMIT32; 330 (void) hat_setup(p->p_as->a_hat, HAT_INIT); 331 332 init_core(); 333 334 init_mstate(curthread, LMS_SYSTEM); 335 return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs)); 336 } 337 338 /* 339 * Start the initial user process for the global zone; once running, if 340 * init should subsequently fail, it will be automatically be caught in the 341 * exit(2) path, and restarted by restart_init(). 342 */ 343 static void 344 start_init(void) 345 { 346 proc_init = curproc; 347 348 ASSERT(curproc->p_zone->zone_initname != NULL); 349 350 if (start_init_common() != 0) 351 halt("unix: Could not start init"); 352 lwp_rtt(); 353 } 354 355 void 356 main(void) 357 { 358 proc_t *p = ttoproc(curthread); /* &p0 */ 359 int (**initptr)(); 360 extern void sched(); 361 extern void fsflush(); 362 extern int (*init_tbl[])(); 363 extern int (*mp_init_tbl[])(); 364 extern id_t syscid, defaultcid; 365 extern int swaploaded; 366 extern int netboot; 367 extern ib_boot_prop_t *iscsiboot_prop; 368 extern void vm_init(void); 369 extern void cbe_init_pre(void); 370 extern void cbe_init(void); 371 extern void clock_tick_init_pre(void); 372 extern void clock_tick_init_post(void); 373 extern void clock_init(void); 374 extern void physio_bufs_init(void); 375 extern void pm_cfb_setup_intr(void); 376 extern int pm_adjust_timestamps(dev_info_t *, void *); 377 extern void start_other_cpus(int); 378 extern void sysevent_evc_thrinit(); 379 extern kmutex_t ualock; 380 #if defined(__x86) 381 extern void fastboot_post_startup(void); 382 extern void progressbar_start(void); 383 #endif 384 /* 385 * In the horrible world of x86 in-lines, you can't get symbolic 386 * structure offsets a la genassym. This assertion is here so 387 * that the next poor slob who innocently changes the offset of 388 * cpu_thread doesn't waste as much time as I just did finding 389 * out that it's hard-coded in i86/ml/i86.il. Similarly for 390 * curcpup. You're welcome. 391 */ 392 ASSERT(CPU == CPU->cpu_self); 393 ASSERT(curthread == CPU->cpu_thread); 394 ASSERT_STACK_ALIGNED(); 395 396 /* 397 * We take the ualock until we have completed the startup 398 * to prevent kadmin() from disrupting this work. In particular, 399 * we don't want kadmin() to bring the system down while we are 400 * trying to start it up. 401 */ 402 mutex_enter(&ualock); 403 404 /* 405 * Setup root lgroup and leaf lgroup for CPU 0 406 */ 407 lgrp_init(LGRP_INIT_STAGE2); 408 409 /* 410 * Once 'startup()' completes, the thread_reaper() daemon would be 411 * created(in thread_init()). After that, it is safe to create threads 412 * that could exit. These exited threads will get reaped. 413 */ 414 startup(); 415 segkmem_gc(); 416 callb_init(); 417 cbe_init_pre(); /* x86 must initialize gethrtimef before timer_init */ 418 timer_init(); /* timer must be initialized before cyclic starts */ 419 cbe_init(); 420 callout_init(); /* callout table MUST be init'd after cyclics */ 421 clock_tick_init_pre(); 422 clock_init(); 423 424 #if defined(__x86) 425 /* 426 * The progressbar thread uses cv_reltimedwait() and hence needs to be 427 * started after the callout mechanism has been initialized. 428 */ 429 progressbar_start(); 430 #endif 431 /* 432 * On some platforms, clkinitf() changes the timing source that 433 * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls 434 * clkinitf(), so re-initialize the microstate counters after the 435 * timesource has been chosen. 436 */ 437 init_mstate(&t0, LMS_SYSTEM); 438 init_cpu_mstate(CPU, CMS_SYSTEM); 439 440 /* 441 * May need to probe to determine latencies from CPU 0 after 442 * gethrtime() comes alive in cbe_init() and before enabling interrupts 443 * and copy and release any temporary memory allocated with BOP_ALLOC() 444 * before release_bootstrap() frees boot memory 445 */ 446 lgrp_init(LGRP_INIT_STAGE3); 447 448 /* 449 * Call all system initialization functions. 450 */ 451 for (initptr = &init_tbl[0]; *initptr; initptr++) 452 (**initptr)(); 453 /* 454 * Load iSCSI boot properties 455 */ 456 ld_ib_prop(); 457 /* 458 * initialize vm related stuff. 459 */ 460 vm_init(); 461 462 /* 463 * initialize buffer pool for raw I/O requests 464 */ 465 physio_bufs_init(); 466 467 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ 468 469 /* 470 * Drop the interrupt level and allow interrupts. At this point 471 * the DDI guarantees that interrupts are enabled. 472 */ 473 (void) spl0(); 474 interrupts_unleashed = 1; 475 476 /* 477 * Create kmem cache for proc structures 478 */ 479 process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 480 0, NULL, NULL, NULL, NULL, NULL, 0); 481 482 vfs_mountroot(); /* Mount the root file system */ 483 errorq_init(); /* after vfs_mountroot() so DDI root is ready */ 484 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ 485 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); 486 /* after vfs_mountroot() so hrestime is valid */ 487 488 post_startup(); 489 swaploaded = 1; 490 491 /* 492 * Initialize Solaris Audit Subsystem 493 */ 494 audit_init(); 495 496 /* 497 * Plumb the protocol modules and drivers only if we are not 498 * networked booted, in this case we already did it in rootconf(). 499 */ 500 if (netboot == 0 && iscsiboot_prop == NULL) 501 (void) strplumb(); 502 503 gethrestime(&PTOU(curproc)->u_start); 504 curthread->t_start = PTOU(curproc)->u_start.tv_sec; 505 p->p_mstart = gethrtime(); 506 507 /* 508 * Perform setup functions that can only be done after root 509 * and swap have been set up. 510 */ 511 consconfig(); 512 #ifndef __sparc 513 release_bootstrap(); 514 #endif 515 516 /* 517 * attach drivers with ddi-forceattach prop 518 * It must be done early enough to load hotplug drivers (e.g. 519 * pcmcia nexus) so that devices enumerated via hotplug is 520 * available before I/O subsystem is fully initialized. 521 */ 522 i_ddi_forceattach_drivers(); 523 524 /* 525 * Set the scan rate and other parameters of the paging subsystem. 526 */ 527 setupclock(0); 528 529 /* 530 * Initialize process 0's lwp directory and lwpid hash table. 531 */ 532 p->p_lwpdir = p->p_lwpfree = p0_lwpdir; 533 p->p_lwpdir->ld_next = p->p_lwpdir + 1; 534 p->p_lwpdir_sz = 2; 535 p->p_tidhash = p0_tidhash; 536 p->p_tidhash_sz = 2; 537 p0_lep.le_thread = curthread; 538 p0_lep.le_lwpid = curthread->t_tid; 539 p0_lep.le_start = curthread->t_start; 540 lwp_hash_in(p, &p0_lep, p0_tidhash, 2, 0); 541 542 /* 543 * Initialize extended accounting. 544 */ 545 exacct_init(); 546 547 /* 548 * Initialize threads of sysevent event channels 549 */ 550 sysevent_evc_thrinit(); 551 552 /* 553 * This must be done after post_startup() but before 554 * start_other_cpus() 555 */ 556 lgrp_init(LGRP_INIT_STAGE4); 557 558 /* 559 * Perform MP initialization, if any. 560 */ 561 start_other_cpus(0); 562 563 #ifdef __sparc 564 /* 565 * Release bootstrap here since PROM interfaces are 566 * used to start other CPUs above. 567 */ 568 release_bootstrap(); 569 #endif 570 571 /* 572 * Finish lgrp initialization after all CPUS are brought online. 573 */ 574 lgrp_init(LGRP_INIT_STAGE5); 575 576 /* 577 * After mp_init(), number of cpus are known (this is 578 * true for the time being, when there are actually 579 * hot pluggable cpus then this scheme would not do). 580 * Any per cpu initialization is done here. 581 */ 582 kmem_mp_init(); 583 vmem_update(NULL); 584 585 clock_tick_init_post(); 586 587 for (initptr = &mp_init_tbl[0]; *initptr; initptr++) 588 (**initptr)(); 589 590 /* 591 * These must be called after start_other_cpus 592 */ 593 pm_cfb_setup_intr(); 594 #if defined(__x86) 595 fastboot_post_startup(); 596 #endif 597 598 /* 599 * Make init process; enter scheduling loop with system process. 600 * 601 * Note that we manually assign the pids for these processes, for 602 * historical reasons. If more pre-assigned pids are needed, 603 * FAMOUS_PIDS will have to be updated. 604 */ 605 606 /* create init process */ 607 if (newproc(start_init, NULL, defaultcid, 59, NULL, 608 FAMOUS_PID_INIT)) 609 panic("main: unable to fork init."); 610 611 /* create pageout daemon */ 612 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL, 613 FAMOUS_PID_PAGEOUT)) 614 panic("main: unable to fork pageout()"); 615 616 /* create fsflush daemon */ 617 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL, 618 FAMOUS_PID_FSFLUSH)) 619 panic("main: unable to fork fsflush()"); 620 621 /* create cluster process if we're a member of one */ 622 if (cluster_bootflags & CLUSTER_BOOTED) { 623 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, 624 NULL, 0)) { 625 panic("main: unable to fork cluster()"); 626 } 627 } 628 629 /* 630 * Create system threads (threads are associated with p0) 631 */ 632 633 /* create module uninstall daemon */ 634 /* BugID 1132273. If swapping over NFS need a bigger stack */ 635 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, 636 NULL, 0, &p0, TS_RUN, minclsyspri); 637 638 (void) thread_create(NULL, 0, seg_pasync_thread, 639 NULL, 0, &p0, TS_RUN, minclsyspri); 640 641 pid_setmin(); 642 643 /* system is now ready */ 644 mutex_exit(&ualock); 645 646 bcopy("sched", PTOU(curproc)->u_psargs, 6); 647 bcopy("sched", PTOU(curproc)->u_comm, 5); 648 sched(); 649 /* NOTREACHED */ 650 } 651