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 2018, Joyent, Inc. 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 uintptr_t ucp; 149 uintptr_t uap; 150 uintptr_t *argv; 151 uintptr_t exec_fnamep; 152 char *scratchargs; 153 int i, sarg; 154 size_t argvlen, alen; 155 size_t wlen = sizeof (uintptr_t); 156 boolean_t in_arg; 157 int argc = 0; 158 int error = 0, count = 0; 159 proc_t *p = ttoproc(curthread); 160 klwp_t *lwp = ttolwp(curthread); 161 int brand_action; 162 163 if (args == NULL) 164 args = ""; 165 166 alen = strlen(initpath) + 1 + strlen(args) + 1; 167 scratchargs = kmem_alloc(alen, KM_SLEEP); 168 (void) snprintf(scratchargs, alen, "%s %s", initpath, args); 169 170 /* 171 * We do a quick two state parse of the string to sort out how big 172 * argc should be. 173 */ 174 in_arg = B_FALSE; 175 for (i = 0; i < strlen(scratchargs); i++) { 176 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 177 if (in_arg) { 178 in_arg = B_FALSE; 179 argc++; 180 } 181 } else { 182 in_arg = B_TRUE; 183 } 184 } 185 argvlen = sizeof (uintptr_t) * (argc + 1); 186 argv = kmem_zalloc(argvlen, KM_SLEEP); 187 188 /* 189 * We pull off a bit of a hack here. We work our way through the 190 * args string, putting nulls at the ends of space delimited tokens 191 * (boot args don't support quoting at this time). Then we just 192 * copy the whole mess to userland in one go. In other words, we 193 * transform this: "init -s -r\0" into this on the stack: 194 * 195 * -0x00 \0 196 * -0x01 r 197 * -0x02 - <--------. 198 * -0x03 \0 | 199 * -0x04 s | 200 * -0x05 - <------. | 201 * -0x06 \0 | | 202 * -0x07 t | | 203 * -0x08 i | | 204 * -0x09 n | | 205 * -0x0a i <---. | | 206 * -0x10 NULL | | | (argv[3]) 207 * -0x14 -----|--|-' (argv[2]) 208 * -0x18 ------|--' (argv[1]) 209 * -0x1c -------' (argv[0]) 210 * 211 * Since we know the value of ucp at the beginning of this process, 212 * we can trivially compute the argv[] array which we also need to 213 * place in userland: argv[i] = ucp - sarg(i), where ucp is the 214 * stack ptr, and sarg is the string index of the start of the 215 * argument. 216 */ 217 ucp = (uintptr_t)p->p_usrstack; 218 219 argc = 0; 220 in_arg = B_FALSE; 221 sarg = 0; 222 223 for (i = 0; i < alen; i++) { 224 if (scratchargs[i] == ' ' || scratchargs[i] == '\0') { 225 if (in_arg == B_TRUE) { 226 in_arg = B_FALSE; 227 scratchargs[i] = '\0'; 228 argv[argc++] = ucp - (alen - sarg); 229 } 230 } else if (in_arg == B_FALSE) { 231 in_arg = B_TRUE; 232 sarg = i; 233 } 234 } 235 236 exec_fnamep = argv[0]; 237 238 ucp -= alen; 239 error |= copyout(scratchargs, (caddr_t)ucp, alen); 240 241 if (p->p_model == DATAMODEL_ILP32) { 242 uintptr32_t *argv32; 243 244 argv32 = kmem_zalloc(argvlen / 2, KM_SLEEP); 245 246 for (i = 0; i < argc; i++) 247 argv32[i] = (uintptr32_t)argv[i]; 248 249 kmem_free(argv, argvlen); 250 argv = (uintptr_t *)argv32; 251 argvlen /= 2; 252 253 wlen = sizeof (uintptr32_t); 254 } 255 256 uap = P2ALIGN(ucp, wlen); 257 /* advance to be below the word we're in */ 258 uap -= wlen; 259 /* advance argc words down, plus one for NULL */ 260 uap -= (argc + 1) * wlen; 261 error |= copyout(argv, (caddr_t)uap, argvlen); 262 263 if (error != 0) { 264 zcmn_err(p->p_zone->zone_id, CE_WARN, 265 "Could not construct stack for init.\n"); 266 kmem_free(argv, argvlen); 267 kmem_free(scratchargs, alen); 268 return (EFAULT); 269 } 270 271 kmem_free(argv, argvlen); 272 kmem_free(scratchargs, alen); 273 274 /* 275 * Point at the arguments. 276 */ 277 lwp->lwp_ap = lwp->lwp_arg; 278 lwp->lwp_arg[0] = exec_fnamep; 279 lwp->lwp_arg[1] = uap; 280 lwp->lwp_arg[2] = 0; 281 curthread->t_post_sys = 1; 282 curthread->t_sysnum = SYS_execve; 283 284 /* 285 * If we are executing init from zsched, we may have inherited its 286 * parent process's signal mask. Clear it now so that we behave in 287 * the same way as when started from the global zone. 288 */ 289 sigemptyset(&curthread->t_hold); 290 291 brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE; 292 again: 293 error = exec_common((const char *)exec_fnamep, 294 (const char **)uap, NULL, brand_action); 295 296 /* 297 * Normally we would just set lwp_argsaved and t_post_sys and 298 * let post_syscall reset lwp_ap for us. Unfortunately, 299 * exec_init isn't always called from a system call. Instead 300 * of making a mess of trap_cleanup, we just reset the args 301 * pointer here. 302 */ 303 reset_syscall_args(); 304 305 switch (error) { 306 case 0: 307 return (0); 308 309 case ENOENT: 310 zcmn_err(p->p_zone->zone_id, CE_WARN, 311 "exec(%s) failed (file not found).\n", initpath); 312 return (ENOENT); 313 314 case EAGAIN: 315 case EINTR: 316 ++count; 317 if (count < 5) { 318 zcmn_err(p->p_zone->zone_id, CE_WARN, 319 "exec(%s) failed with errno %d. Retrying...\n", 320 initpath, error); 321 goto again; 322 } 323 } 324 325 zcmn_err(p->p_zone->zone_id, CE_WARN, 326 "exec(%s) failed with errno %d.", initpath, error); 327 return (error); 328 } 329 330 /* 331 * This routine does all of the common setup for invoking init; global 332 * and non-global zones employ this routine for the functionality which is 333 * in common. 334 * 335 * This program (init, presumably) must be a 32-bit process. 336 */ 337 int 338 start_init_common() 339 { 340 proc_t *p = curproc; 341 ASSERT_STACK_ALIGNED(); 342 p->p_zone->zone_proc_initpid = p->p_pid; 343 344 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; 345 p->p_usrstack = (caddr_t)USRSTACK32; 346 p->p_model = DATAMODEL_ILP32; 347 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; 348 p->p_datprot = PROT_ZFOD & ~PROT_EXEC; 349 p->p_stk_ctl = INT32_MAX; 350 351 p->p_as = as_alloc(); 352 p->p_as->a_proc = p; 353 p->p_as->a_userlimit = (caddr_t)USERLIMIT32; 354 (void) hat_setup(p->p_as->a_hat, HAT_INIT); 355 356 init_core(); 357 358 init_mstate(curthread, LMS_SYSTEM); 359 return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs)); 360 } 361 362 /* 363 * Start the initial user process for the global zone; once running, if 364 * init should subsequently fail, it will be automatically be caught in the 365 * exit(2) path, and restarted by restart_init(). 366 */ 367 static void 368 start_init(void) 369 { 370 proc_init = curproc; 371 372 ASSERT(curproc->p_zone->zone_initname != NULL); 373 374 if (start_init_common() != 0) 375 halt("unix: Could not start init"); 376 lwp_rtt(); 377 } 378 379 void 380 main(void) 381 { 382 proc_t *p = ttoproc(curthread); /* &p0 */ 383 int (**initptr)(); 384 extern void sched(); 385 extern void fsflush(); 386 extern int (*init_tbl[])(); 387 extern int (*mp_init_tbl[])(); 388 extern id_t syscid, defaultcid; 389 extern int swaploaded; 390 extern int netboot; 391 extern ib_boot_prop_t *iscsiboot_prop; 392 extern void vm_init(void); 393 extern void cbe_init_pre(void); 394 extern void cbe_init(void); 395 extern void clock_tick_init_pre(void); 396 extern void clock_tick_init_post(void); 397 extern void clock_init(void); 398 extern void physio_bufs_init(void); 399 extern void pm_cfb_setup_intr(void); 400 extern int pm_adjust_timestamps(dev_info_t *, void *); 401 extern void start_other_cpus(int); 402 extern void sysevent_evc_thrinit(); 403 extern kmutex_t ualock; 404 #if defined(__x86) 405 extern void fastboot_post_startup(void); 406 extern void progressbar_start(void); 407 #endif 408 /* 409 * In the horrible world of x86 in-lines, you can't get symbolic 410 * structure offsets a la genassym. This assertion is here so 411 * that the next poor slob who innocently changes the offset of 412 * cpu_thread doesn't waste as much time as I just did finding 413 * out that it's hard-coded in i86/ml/i86.il. Similarly for 414 * curcpup. You're welcome. 415 */ 416 ASSERT(CPU == CPU->cpu_self); 417 ASSERT(curthread == CPU->cpu_thread); 418 ASSERT_STACK_ALIGNED(); 419 420 /* 421 * We take the ualock until we have completed the startup 422 * to prevent kadmin() from disrupting this work. In particular, 423 * we don't want kadmin() to bring the system down while we are 424 * trying to start it up. 425 */ 426 mutex_enter(&ualock); 427 428 /* 429 * Setup root lgroup and leaf lgroup for CPU 0 430 */ 431 lgrp_init(LGRP_INIT_STAGE2); 432 433 /* 434 * Once 'startup()' completes, the thread_reaper() daemon would be 435 * created(in thread_init()). After that, it is safe to create threads 436 * that could exit. These exited threads will get reaped. 437 */ 438 startup(); 439 segkmem_gc(); 440 callb_init(); 441 cbe_init_pre(); /* x86 must initialize gethrtimef before timer_init */ 442 ddi_periodic_init(); 443 cbe_init(); 444 callout_init(); /* callout table MUST be init'd after cyclics */ 445 clock_tick_init_pre(); 446 clock_init(); 447 448 #if defined(__x86) 449 /* 450 * The progressbar thread uses cv_reltimedwait() and hence needs to be 451 * started after the callout mechanism has been initialized. 452 */ 453 progressbar_start(); 454 #endif 455 /* 456 * On some platforms, clkinitf() changes the timing source that 457 * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls 458 * clkinitf(), so re-initialize the microstate counters after the 459 * timesource has been chosen. 460 */ 461 init_mstate(&t0, LMS_SYSTEM); 462 init_cpu_mstate(CPU, CMS_SYSTEM); 463 464 /* 465 * May need to probe to determine latencies from CPU 0 after 466 * gethrtime() comes alive in cbe_init() and before enabling interrupts 467 * and copy and release any temporary memory allocated with BOP_ALLOC() 468 * before release_bootstrap() frees boot memory 469 */ 470 lgrp_init(LGRP_INIT_STAGE3); 471 472 /* 473 * Call all system initialization functions. 474 */ 475 for (initptr = &init_tbl[0]; *initptr; initptr++) 476 (**initptr)(); 477 /* 478 * Load iSCSI boot properties 479 */ 480 ld_ib_prop(); 481 /* 482 * initialize vm related stuff. 483 */ 484 vm_init(); 485 486 /* 487 * initialize buffer pool for raw I/O requests 488 */ 489 physio_bufs_init(); 490 491 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ 492 493 /* 494 * Drop the interrupt level and allow interrupts. At this point 495 * the DDI guarantees that interrupts are enabled. 496 */ 497 (void) spl0(); 498 interrupts_unleashed = 1; 499 500 /* 501 * Create kmem cache for proc structures 502 */ 503 process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 504 0, NULL, NULL, NULL, NULL, NULL, 0); 505 506 vfs_mountroot(); /* Mount the root file system */ 507 errorq_init(); /* after vfs_mountroot() so DDI root is ready */ 508 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ 509 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); 510 /* after vfs_mountroot() so hrestime is valid */ 511 512 post_startup(); 513 swaploaded = 1; 514 515 /* 516 * Initialize Solaris Audit Subsystem 517 */ 518 audit_init(); 519 520 /* 521 * Plumb the protocol modules and drivers only if we are not 522 * networked booted, in this case we already did it in rootconf(). 523 */ 524 if (netboot == 0 && iscsiboot_prop == NULL) 525 (void) strplumb(); 526 527 gethrestime(&PTOU(curproc)->u_start); 528 curthread->t_start = PTOU(curproc)->u_start.tv_sec; 529 p->p_mstart = gethrtime(); 530 531 /* 532 * Perform setup functions that can only be done after root 533 * and swap have been set up. 534 */ 535 consconfig(); 536 #ifndef __sparc 537 release_bootstrap(); 538 #endif 539 540 /* 541 * attach drivers with ddi-forceattach prop 542 * It must be done early enough to load hotplug drivers (e.g. 543 * pcmcia nexus) so that devices enumerated via hotplug is 544 * available before I/O subsystem is fully initialized. 545 */ 546 i_ddi_forceattach_drivers(); 547 548 /* 549 * Set the scan rate and other parameters of the paging subsystem. 550 */ 551 setupclock(0); 552 553 /* 554 * Initialize process 0's lwp directory and lwpid hash table. 555 */ 556 p->p_lwpdir = p->p_lwpfree = p0_lwpdir; 557 p->p_lwpdir->ld_next = p->p_lwpdir + 1; 558 p->p_lwpdir_sz = 2; 559 p->p_tidhash = p0_tidhash; 560 p->p_tidhash_sz = 2; 561 p0_lep.le_thread = curthread; 562 p0_lep.le_lwpid = curthread->t_tid; 563 p0_lep.le_start = curthread->t_start; 564 lwp_hash_in(p, &p0_lep, p0_tidhash, 2, 0); 565 566 /* 567 * Initialize extended accounting. 568 */ 569 exacct_init(); 570 571 /* 572 * Initialize threads of sysevent event channels 573 */ 574 sysevent_evc_thrinit(); 575 576 /* 577 * This must be done after post_startup() but before 578 * start_other_cpus() 579 */ 580 lgrp_init(LGRP_INIT_STAGE4); 581 582 /* 583 * Perform MP initialization, if any. 584 */ 585 start_other_cpus(0); 586 587 #ifdef __sparc 588 /* 589 * Release bootstrap here since PROM interfaces are 590 * used to start other CPUs above. 591 */ 592 release_bootstrap(); 593 #endif 594 595 /* 596 * Finish lgrp initialization after all CPUS are brought online. 597 */ 598 lgrp_init(LGRP_INIT_STAGE5); 599 600 /* 601 * After mp_init(), number of cpus are known (this is 602 * true for the time being, when there are actually 603 * hot pluggable cpus then this scheme would not do). 604 * Any per cpu initialization is done here. 605 */ 606 kmem_mp_init(); 607 vmem_update(NULL); 608 609 clock_tick_init_post(); 610 611 for (initptr = &mp_init_tbl[0]; *initptr; initptr++) 612 (**initptr)(); 613 614 /* 615 * These must be called after start_other_cpus 616 */ 617 pm_cfb_setup_intr(); 618 #if defined(__x86) 619 fastboot_post_startup(); 620 #endif 621 622 /* 623 * Make init process; enter scheduling loop with system process. 624 * 625 * Note that we manually assign the pids for these processes, for 626 * historical reasons. If more pre-assigned pids are needed, 627 * FAMOUS_PIDS will have to be updated. 628 */ 629 630 /* create init process */ 631 if (newproc(start_init, NULL, defaultcid, 59, NULL, 632 FAMOUS_PID_INIT)) 633 panic("main: unable to fork init."); 634 635 /* create pageout daemon */ 636 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL, 637 FAMOUS_PID_PAGEOUT)) 638 panic("main: unable to fork pageout()"); 639 640 /* create fsflush daemon */ 641 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL, 642 FAMOUS_PID_FSFLUSH)) 643 panic("main: unable to fork fsflush()"); 644 645 /* create cluster process if we're a member of one */ 646 if (cluster_bootflags & CLUSTER_BOOTED) { 647 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, 648 NULL, 0)) { 649 panic("main: unable to fork cluster()"); 650 } 651 } 652 653 /* 654 * Create system threads (threads are associated with p0) 655 */ 656 657 /* create module uninstall daemon */ 658 /* BugID 1132273. If swapping over NFS need a bigger stack */ 659 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, 660 NULL, 0, &p0, TS_RUN, minclsyspri); 661 662 (void) thread_create(NULL, 0, seg_pasync_thread, 663 NULL, 0, &p0, TS_RUN, minclsyspri); 664 665 pid_setmin(); 666 667 /* system is now ready */ 668 mutex_exit(&ualock); 669 670 bcopy("sched", PTOU(curproc)->u_psargs, 6); 671 bcopy("sched", PTOU(curproc)->u_comm, 5); 672 sched(); 673 /* NOTREACHED */ 674 } 675