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 /* 30 * Copyright (c) 2013, Joyent, Inc. All rights reserved. 31 */ 32 33 #include <sys/types.h> 34 #include <sys/param.h> 35 #include <sys/sysmacros.h> 36 #include <sys/pcb.h> 37 #include <sys/systm.h> 38 #include <sys/signal.h> 39 #include <sys/cred.h> 40 #include <sys/user.h> 41 #include <sys/vfs.h> 42 #include <sys/vnode.h> 43 #include <sys/proc.h> 44 #include <sys/time.h> 45 #include <sys/file.h> 46 #include <sys/priocntl.h> 47 #include <sys/procset.h> 48 #include <sys/disp.h> 49 #include <sys/callo.h> 50 #include <sys/callb.h> 51 #include <sys/debug.h> 52 #include <sys/conf.h> 53 #include <sys/bootconf.h> 54 #include <sys/utsname.h> 55 #include <sys/cmn_err.h> 56 #include <sys/vmparam.h> 57 #include <sys/modctl.h> 58 #include <sys/vm.h> 59 #include <sys/callb.h> 60 #include <sys/ddi_periodic.h> 61 #include <sys/kmem.h> 62 #include <sys/vmem.h> 63 #include <sys/cpuvar.h> 64 #include <sys/cladm.h> 65 #include <sys/corectl.h> 66 #include <sys/exec.h> 67 #include <sys/syscall.h> 68 #include <sys/reboot.h> 69 #include <sys/task.h> 70 #include <sys/exacct.h> 71 #include <sys/autoconf.h> 72 #include <sys/errorq.h> 73 #include <sys/class.h> 74 #include <sys/stack.h> 75 #include <sys/brand.h> 76 #include <sys/mmapobj.h> 77 78 #include <vm/as.h> 79 #include <vm/seg_kmem.h> 80 #include <sys/dc_ki.h> 81 82 #include <c2/audit.h> 83 #include <sys/bootprops.h> 84 85 /* well known processes */ 86 proc_t *proc_sched; /* memory scheduler */ 87 proc_t *proc_init; /* init */ 88 proc_t *proc_pageout; /* pageout daemon */ 89 proc_t *proc_fsflush; /* fsflush daemon */ 90 91 pgcnt_t maxmem; /* Maximum available memory in pages. */ 92 pgcnt_t freemem; /* Current available memory in pages. */ 93 int interrupts_unleashed; /* set when we do the first spl0() */ 94 95 kmem_cache_t *process_cache; /* kmem cache for proc structures */ 96 97 /* 98 * Indicates whether the auditing module (c2audit) is loaded. Possible 99 * values are: 100 * 0 - c2audit module is excluded in /etc/system and cannot be loaded 101 * 1 - c2audit module is not loaded but can be anytime 102 * 2 - c2audit module is loaded 103 */ 104 int audit_active = C2AUDIT_DISABLED; 105 106 /* 107 * Process 0's lwp directory and lwpid hash table. 108 */ 109 lwpdir_t p0_lwpdir[2]; 110 tidhash_t p0_tidhash[2]; 111 lwpent_t p0_lep; 112 113 /* 114 * Machine-independent initialization code 115 * Called from cold start routine as 116 * soon as a stack and segmentation 117 * have been established. 118 * Functions: 119 * clear and free user core 120 * turn on clock 121 * hand craft 0th process 122 * call all initialization routines 123 * fork - process 0 to schedule 124 * - process 1 execute bootstrap 125 * - process 2 to page out 126 * create system threads 127 */ 128 129 int cluster_bootflags = 0; 130 131 void 132 cluster_wrapper(void) 133 { 134 cluster(); 135 panic("cluster() returned"); 136 } 137 138 char initname[INITNAME_SZ] = "/sbin/init"; /* also referenced by zone0 */ 139 char initargs[BOOTARGS_MAX] = ""; /* also referenced by zone0 */ 140 141 /* 142 * Construct a stack for init containing the arguments to it, then 143 * pass control to exec_common. 144 */ 145 int 146 exec_init(const char *initpath, const char *args) 147 { 148 caddr32_t ucp; 149 caddr32_t *uap; 150 caddr32_t *argv; 151 caddr32_t exec_fnamep; 152 char *scratchargs; 153 int i, sarg; 154 size_t argvlen, alen; 155 boolean_t in_arg; 156 int argc = 0; 157 int error = 0, count = 0; 158 proc_t *p = ttoproc(curthread); 159 klwp_t *lwp = ttolwp(curthread); 160 int brand_action; 161 162 if (args == NULL) 163 args = ""; 164 165 alen = strlen(initpath) + 1 + strlen(args) + 1; 166 scratchargs = kmem_alloc(alen, KM_SLEEP); 167 (void) snprintf(scratchargs, alen, "%s %s", initpath, args); 168 169 /* 170 * We do a quick two state parse of the string to sort out how big 171 * argc should be. 172 */ 173 in_arg = B_FALSE; 174 for (i = 0; i < strlen(scratchargs); i++) { 175 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 176 if (in_arg) { 177 in_arg = B_FALSE; 178 argc++; 179 } 180 } else { 181 in_arg = B_TRUE; 182 } 183 } 184 argvlen = sizeof (caddr32_t) * (argc + 1); 185 argv = kmem_zalloc(argvlen, KM_SLEEP); 186 187 /* 188 * We pull off a bit of a hack here. We work our way through the 189 * args string, putting nulls at the ends of space delimited tokens 190 * (boot args don't support quoting at this time). Then we just 191 * copy the whole mess to userland in one go. In other words, we 192 * transform this: "init -s -r\0" into this on the stack: 193 * 194 * -0x00 \0 195 * -0x01 r 196 * -0x02 - <--------. 197 * -0x03 \0 | 198 * -0x04 s | 199 * -0x05 - <------. | 200 * -0x06 \0 | | 201 * -0x07 t | | 202 * -0x08 i | | 203 * -0x09 n | | 204 * -0x0a i <---. | | 205 * -0x10 NULL | | | (argv[3]) 206 * -0x14 -----|--|-' (argv[2]) 207 * -0x18 ------|--' (argv[1]) 208 * -0x1c -------' (argv[0]) 209 * 210 * Since we know the value of ucp at the beginning of this process, 211 * we can trivially compute the argv[] array which we also need to 212 * place in userland: argv[i] = ucp - sarg(i), where ucp is the 213 * stack ptr, and sarg is the string index of the start of the 214 * argument. 215 */ 216 ucp = (caddr32_t)(uintptr_t)p->p_usrstack; 217 218 argc = 0; 219 in_arg = B_FALSE; 220 sarg = 0; 221 222 for (i = 0; i < alen; i++) { 223 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 224 if (in_arg == B_TRUE) { 225 in_arg = B_FALSE; 226 scratchargs[i] = '\0'; 227 argv[argc++] = ucp - (alen - sarg); 228 } 229 } else if (in_arg == B_FALSE) { 230 in_arg = B_TRUE; 231 sarg = i; 232 } 233 } 234 ucp -= alen; 235 error |= copyout(scratchargs, (caddr_t)(uintptr_t)ucp, alen); 236 237 uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t)); 238 uap--; /* advance to be below the word we're in */ 239 uap -= (argc + 1); /* advance argc words down, plus one for NULL */ 240 error |= copyout(argv, uap, argvlen); 241 242 if (error != 0) { 243 zcmn_err(p->p_zone->zone_id, CE_WARN, 244 "Could not construct stack for init.\n"); 245 kmem_free(argv, argvlen); 246 kmem_free(scratchargs, alen); 247 return (EFAULT); 248 } 249 250 exec_fnamep = argv[0]; 251 kmem_free(argv, argvlen); 252 kmem_free(scratchargs, alen); 253 254 /* 255 * Point at the arguments. 256 */ 257 lwp->lwp_ap = lwp->lwp_arg; 258 lwp->lwp_arg[0] = (uintptr_t)exec_fnamep; 259 lwp->lwp_arg[1] = (uintptr_t)uap; 260 lwp->lwp_arg[2] = NULL; 261 curthread->t_post_sys = 1; 262 curthread->t_sysnum = SYS_execve; 263 264 /* 265 * If we are executing init from zsched, we may have inherited its 266 * parent process's signal mask. Clear it now so that we behave in 267 * the same way as when started from the global zone. 268 */ 269 sigemptyset(&curthread->t_hold); 270 271 brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE; 272 again: 273 error = exec_common((const char *)(uintptr_t)exec_fnamep, 274 (const char **)(uintptr_t)uap, NULL, brand_action); 275 276 /* 277 * Normally we would just set lwp_argsaved and t_post_sys and 278 * let post_syscall reset lwp_ap for us. Unfortunately, 279 * exec_init isn't always called from a system call. Instead 280 * of making a mess of trap_cleanup, we just reset the args 281 * pointer here. 282 */ 283 reset_syscall_args(); 284 285 switch (error) { 286 case 0: 287 return (0); 288 289 case ENOENT: 290 zcmn_err(p->p_zone->zone_id, CE_WARN, 291 "exec(%s) failed (file not found).\n", initpath); 292 return (ENOENT); 293 294 case EAGAIN: 295 case EINTR: 296 ++count; 297 if (count < 5) { 298 zcmn_err(p->p_zone->zone_id, CE_WARN, 299 "exec(%s) failed with errno %d. Retrying...\n", 300 initpath, error); 301 goto again; 302 } 303 } 304 305 zcmn_err(p->p_zone->zone_id, CE_WARN, 306 "exec(%s) failed with errno %d.", initpath, error); 307 return (error); 308 } 309 310 /* 311 * This routine does all of the common setup for invoking init; global 312 * and non-global zones employ this routine for the functionality which is 313 * in common. 314 * 315 * This program (init, presumably) must be a 32-bit process. 316 */ 317 int 318 start_init_common() 319 { 320 proc_t *p = curproc; 321 ASSERT_STACK_ALIGNED(); 322 p->p_zone->zone_proc_initpid = p->p_pid; 323 324 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; 325 p->p_usrstack = (caddr_t)USRSTACK32; 326 p->p_model = DATAMODEL_ILP32; 327 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; 328 p->p_datprot = PROT_ZFOD & ~PROT_EXEC; 329 p->p_stk_ctl = INT32_MAX; 330 331 p->p_as = as_alloc(); 332 p->p_as->a_proc = p; 333 p->p_as->a_userlimit = (caddr_t)USERLIMIT32; 334 (void) hat_setup(p->p_as->a_hat, HAT_INIT); 335 336 init_core(); 337 338 init_mstate(curthread, LMS_SYSTEM); 339 return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs)); 340 } 341 342 /* 343 * Start the initial user process for the global zone; once running, if 344 * init should subsequently fail, it will be automatically be caught in the 345 * exit(2) path, and restarted by restart_init(). 346 */ 347 static void 348 start_init(void) 349 { 350 proc_init = curproc; 351 352 ASSERT(curproc->p_zone->zone_initname != NULL); 353 354 if (start_init_common() != 0) 355 halt("unix: Could not start init"); 356 lwp_rtt(); 357 } 358 359 void 360 main(void) 361 { 362 proc_t *p = ttoproc(curthread); /* &p0 */ 363 int (**initptr)(); 364 extern void sched(); 365 extern void fsflush(); 366 extern int (*init_tbl[])(); 367 extern int (*mp_init_tbl[])(); 368 extern id_t syscid, defaultcid; 369 extern int swaploaded; 370 extern int netboot; 371 extern ib_boot_prop_t *iscsiboot_prop; 372 extern void vm_init(void); 373 extern void cbe_init_pre(void); 374 extern void cbe_init(void); 375 extern void clock_tick_init_pre(void); 376 extern void clock_tick_init_post(void); 377 extern void clock_init(void); 378 extern void physio_bufs_init(void); 379 extern void pm_cfb_setup_intr(void); 380 extern int pm_adjust_timestamps(dev_info_t *, void *); 381 extern void start_other_cpus(int); 382 extern void sysevent_evc_thrinit(); 383 extern kmutex_t ualock; 384 #if defined(__x86) 385 extern void fastboot_post_startup(void); 386 extern void progressbar_start(void); 387 #endif 388 /* 389 * In the horrible world of x86 in-lines, you can't get symbolic 390 * structure offsets a la genassym. This assertion is here so 391 * that the next poor slob who innocently changes the offset of 392 * cpu_thread doesn't waste as much time as I just did finding 393 * out that it's hard-coded in i86/ml/i86.il. Similarly for 394 * curcpup. You're welcome. 395 */ 396 ASSERT(CPU == CPU->cpu_self); 397 ASSERT(curthread == CPU->cpu_thread); 398 ASSERT_STACK_ALIGNED(); 399 400 /* 401 * We take the ualock until we have completed the startup 402 * to prevent kadmin() from disrupting this work. In particular, 403 * we don't want kadmin() to bring the system down while we are 404 * trying to start it up. 405 */ 406 mutex_enter(&ualock); 407 408 /* 409 * Setup root lgroup and leaf lgroup for CPU 0 410 */ 411 lgrp_init(LGRP_INIT_STAGE2); 412 413 /* 414 * Once 'startup()' completes, the thread_reaper() daemon would be 415 * created(in thread_init()). After that, it is safe to create threads 416 * that could exit. These exited threads will get reaped. 417 */ 418 startup(); 419 segkmem_gc(); 420 callb_init(); 421 cbe_init_pre(); /* x86 must initialize gethrtimef before timer_init */ 422 ddi_periodic_init(); 423 cbe_init(); 424 callout_init(); /* callout table MUST be init'd after cyclics */ 425 clock_tick_init_pre(); 426 clock_init(); 427 428 #if defined(__x86) 429 /* 430 * The progressbar thread uses cv_reltimedwait() and hence needs to be 431 * started after the callout mechanism has been initialized. 432 */ 433 progressbar_start(); 434 #endif 435 /* 436 * On some platforms, clkinitf() changes the timing source that 437 * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls 438 * clkinitf(), so re-initialize the microstate counters after the 439 * timesource has been chosen. 440 */ 441 init_mstate(&t0, LMS_SYSTEM); 442 init_cpu_mstate(CPU, CMS_SYSTEM); 443 444 /* 445 * May need to probe to determine latencies from CPU 0 after 446 * gethrtime() comes alive in cbe_init() and before enabling interrupts 447 * and copy and release any temporary memory allocated with BOP_ALLOC() 448 * before release_bootstrap() frees boot memory 449 */ 450 lgrp_init(LGRP_INIT_STAGE3); 451 452 /* 453 * Call all system initialization functions. 454 */ 455 for (initptr = &init_tbl[0]; *initptr; initptr++) 456 (**initptr)(); 457 /* 458 * Load iSCSI boot properties 459 */ 460 ld_ib_prop(); 461 /* 462 * initialize vm related stuff. 463 */ 464 vm_init(); 465 466 /* 467 * initialize buffer pool for raw I/O requests 468 */ 469 physio_bufs_init(); 470 471 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ 472 473 /* 474 * Drop the interrupt level and allow interrupts. At this point 475 * the DDI guarantees that interrupts are enabled. 476 */ 477 (void) spl0(); 478 interrupts_unleashed = 1; 479 480 /* 481 * Create kmem cache for proc structures 482 */ 483 process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 484 0, NULL, NULL, NULL, NULL, NULL, 0); 485 486 vfs_mountroot(); /* Mount the root file system */ 487 errorq_init(); /* after vfs_mountroot() so DDI root is ready */ 488 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ 489 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); 490 /* after vfs_mountroot() so hrestime is valid */ 491 492 post_startup(); 493 swaploaded = 1; 494 495 /* 496 * Initialize Solaris Audit Subsystem 497 */ 498 audit_init(); 499 500 /* 501 * Start the periodic hash rescale for all vmem arenas before we load 502 * protocol modules and drivers via strplumb() below. Some drivers 503 * might rely on heavy vmem operations that could hurt performance 504 * without the rescale. 505 */ 506 vmem_update(NULL); 507 508 /* 509 * Plumb the protocol modules and drivers only if we are not 510 * networked booted, in this case we already did it in rootconf(). 511 */ 512 if (netboot == 0 && iscsiboot_prop == NULL) 513 (void) strplumb(); 514 515 gethrestime(&PTOU(curproc)->u_start); 516 curthread->t_start = PTOU(curproc)->u_start.tv_sec; 517 p->p_mstart = gethrtime(); 518 519 /* 520 * Perform setup functions that can only be done after root 521 * and swap have been set up. 522 */ 523 consconfig(); 524 #ifndef __sparc 525 release_bootstrap(); 526 #endif 527 528 /* 529 * attach drivers with ddi-forceattach prop 530 * It must be done early enough to load hotplug drivers (e.g. 531 * pcmcia nexus) so that devices enumerated via hotplug is 532 * available before I/O subsystem is fully initialized. 533 */ 534 i_ddi_forceattach_drivers(); 535 536 /* 537 * Set the scan rate and other parameters of the paging subsystem. 538 */ 539 setupclock(0); 540 541 /* 542 * Initialize process 0's lwp directory and lwpid hash table. 543 */ 544 p->p_lwpdir = p->p_lwpfree = p0_lwpdir; 545 p->p_lwpdir->ld_next = p->p_lwpdir + 1; 546 p->p_lwpdir_sz = 2; 547 p->p_tidhash = p0_tidhash; 548 p->p_tidhash_sz = 2; 549 p0_lep.le_thread = curthread; 550 p0_lep.le_lwpid = curthread->t_tid; 551 p0_lep.le_start = curthread->t_start; 552 lwp_hash_in(p, &p0_lep, p0_tidhash, 2, 0); 553 554 /* 555 * Initialize extended accounting. 556 */ 557 exacct_init(); 558 559 /* 560 * Initialize threads of sysevent event channels 561 */ 562 sysevent_evc_thrinit(); 563 564 /* 565 * This must be done after post_startup() but before 566 * start_other_cpus() 567 */ 568 lgrp_init(LGRP_INIT_STAGE4); 569 570 /* 571 * Perform MP initialization, if any. 572 */ 573 start_other_cpus(0); 574 575 #ifdef __sparc 576 /* 577 * Release bootstrap here since PROM interfaces are 578 * used to start other CPUs above. 579 */ 580 release_bootstrap(); 581 #endif 582 583 /* 584 * Finish lgrp initialization after all CPUS are brought online. 585 */ 586 lgrp_init(LGRP_INIT_STAGE5); 587 588 /* 589 * After mp_init(), number of cpus are known (this is 590 * true for the time being, when there are actually 591 * hot pluggable cpus then this scheme would not do). 592 * Any per cpu initialization is done here. 593 */ 594 kmem_mp_init(); 595 596 clock_tick_init_post(); 597 598 for (initptr = &mp_init_tbl[0]; *initptr; initptr++) 599 (**initptr)(); 600 601 /* 602 * These must be called after start_other_cpus 603 */ 604 pm_cfb_setup_intr(); 605 #if defined(__x86) 606 fastboot_post_startup(); 607 #endif 608 609 /* 610 * Make init process; enter scheduling loop with system process. 611 * 612 * Note that we manually assign the pids for these processes, for 613 * historical reasons. If more pre-assigned pids are needed, 614 * FAMOUS_PIDS will have to be updated. 615 */ 616 617 /* create init process */ 618 if (newproc(start_init, NULL, defaultcid, 59, NULL, 619 FAMOUS_PID_INIT)) 620 panic("main: unable to fork init."); 621 622 /* create pageout daemon */ 623 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL, 624 FAMOUS_PID_PAGEOUT)) 625 panic("main: unable to fork pageout()"); 626 627 /* create fsflush daemon */ 628 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL, 629 FAMOUS_PID_FSFLUSH)) 630 panic("main: unable to fork fsflush()"); 631 632 /* create cluster process if we're a member of one */ 633 if (cluster_bootflags & CLUSTER_BOOTED) { 634 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, 635 NULL, 0)) { 636 panic("main: unable to fork cluster()"); 637 } 638 } 639 640 /* 641 * Create system threads (threads are associated with p0) 642 */ 643 644 /* create module uninstall daemon */ 645 /* BugID 1132273. If swapping over NFS need a bigger stack */ 646 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, 647 NULL, 0, &p0, TS_RUN, minclsyspri); 648 649 (void) thread_create(NULL, 0, seg_pasync_thread, 650 NULL, 0, &p0, TS_RUN, minclsyspri); 651 652 pid_setmin(); 653 654 /* system is now ready */ 655 mutex_exit(&ualock); 656 657 bcopy("sched", PTOU(curproc)->u_psargs, 6); 658 bcopy("sched", PTOU(curproc)->u_comm, 5); 659 sched(); 660 /* NOTREACHED */ 661 } 662