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 proc_t *proc_intrd; /* interrupt daemon */
91
92 pgcnt_t maxmem; /* Maximum available memory in pages. */
93 pgcnt_t freemem; /* Current available memory in pages. */
94 int interrupts_unleashed; /* set when we do the first spl0() */
95
96 kmem_cache_t *process_cache; /* kmem cache for proc structures */
97
98 /*
99 * Indicates whether the auditing module (c2audit) is loaded. Possible
100 * values are:
101 * 0 - c2audit module is excluded in /etc/system and cannot be loaded
102 * 1 - c2audit module is not loaded but can be anytime
103 * 2 - c2audit module is loaded
104 */
105 int audit_active = C2AUDIT_DISABLED;
106
107 /*
108 * Process 0's lwp directory and lwpid hash table.
109 */
110 lwpdir_t p0_lwpdir[2];
111 tidhash_t p0_tidhash[2];
112 lwpent_t p0_lep;
113
114 /*
115 * Machine-independent initialization code
116 * Called from cold start routine as
117 * soon as a stack and segmentation
118 * have been established.
119 * Functions:
120 * clear and free user core
121 * turn on clock
122 * hand craft 0th process
123 * call all initialization routines
124 * fork - process 0 to schedule
125 * - process 1 execute bootstrap
126 * - process 2 to page out
127 * create system threads
128 */
129
130 int cluster_bootflags = 0;
131
132 void
133 cluster_wrapper(void)
134 {
135 cluster();
136 panic("cluster() returned");
137 }
138
139 char initname[INITNAME_SZ] = "/sbin/init"; /* also referenced by zone0 */
140 char initargs[BOOTARGS_MAX] = ""; /* also referenced by zone0 */
141
142 /*
143 * Construct a stack for init containing the arguments to it, then
144 * pass control to exec_common.
145 */
146 int
147 exec_init(const char *initpath, const char *args)
148 {
149 caddr32_t ucp;
150 caddr32_t *uap;
151 caddr32_t *argv;
152 caddr32_t exec_fnamep;
153 char *scratchargs;
154 int i, sarg;
155 size_t argvlen, alen;
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 (caddr32_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 = (caddr32_t)(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 ucp -= alen;
236 error |= copyout(scratchargs, (caddr_t)(uintptr_t)ucp, alen);
237
238 uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t));
239 uap--; /* advance to be below the word we're in */
240 uap -= (argc + 1); /* advance argc words down, plus one for NULL */
241 error |= copyout(argv, uap, argvlen);
242
243 if (error != 0) {
244 zcmn_err(p->p_zone->zone_id, CE_WARN,
245 "Could not construct stack for init.\n");
246 kmem_free(argv, argvlen);
247 kmem_free(scratchargs, alen);
248 return (EFAULT);
249 }
250
251 exec_fnamep = argv[0];
252 kmem_free(argv, argvlen);
253 kmem_free(scratchargs, alen);
254
255 /*
256 * Point at the arguments.
257 */
258 lwp->lwp_ap = lwp->lwp_arg;
259 lwp->lwp_arg[0] = (uintptr_t)exec_fnamep;
260 lwp->lwp_arg[1] = (uintptr_t)uap;
261 lwp->lwp_arg[2] = NULL;
262 curthread->t_post_sys = 1;
263 curthread->t_sysnum = SYS_execve;
264
265 /*
266 * If we are executing init from zsched, we may have inherited its
267 * parent process's signal mask. Clear it now so that we behave in
268 * the same way as when started from the global zone.
269 */
270 sigemptyset(&curthread->t_hold);
271
272 brand_action = ZONE_IS_BRANDED(p->p_zone) ? EBA_BRAND : EBA_NONE;
273 again:
274 error = exec_common((const char *)(uintptr_t)exec_fnamep,
275 (const char **)(uintptr_t)uap, NULL, brand_action);
276
277 /*
278 * Normally we would just set lwp_argsaved and t_post_sys and
279 * let post_syscall reset lwp_ap for us. Unfortunately,
280 * exec_init isn't always called from a system call. Instead
281 * of making a mess of trap_cleanup, we just reset the args
282 * pointer here.
283 */
284 reset_syscall_args();
285
286 switch (error) {
287 case 0:
288 return (0);
289
290 case ENOENT:
291 zcmn_err(p->p_zone->zone_id, CE_WARN,
292 "exec(%s) failed (file not found).\n", initpath);
293 return (ENOENT);
294
295 case EAGAIN:
296 case EINTR:
297 ++count;
298 if (count < 5) {
299 zcmn_err(p->p_zone->zone_id, CE_WARN,
300 "exec(%s) failed with errno %d. Retrying...\n",
301 initpath, error);
302 goto again;
303 }
304 }
305
306 zcmn_err(p->p_zone->zone_id, CE_WARN,
307 "exec(%s) failed with errno %d.", initpath, error);
308 return (error);
309 }
310
311 /*
312 * This routine does all of the common setup for invoking init; global
313 * and non-global zones employ this routine for the functionality which is
314 * in common.
315 *
316 * This program (init, presumably) must be a 32-bit process.
317 */
318 int
319 start_init_common()
320 {
321 proc_t *p = curproc;
322 ASSERT_STACK_ALIGNED();
323 p->p_zone->zone_proc_initpid = p->p_pid;
324
325 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0;
326 p->p_usrstack = (caddr_t)USRSTACK32;
327 p->p_model = DATAMODEL_ILP32;
328 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC;
329 p->p_datprot = PROT_ZFOD & ~PROT_EXEC;
330 p->p_stk_ctl = INT32_MAX;
331
332 p->p_as = as_alloc();
333 p->p_as->a_proc = p;
334 p->p_as->a_userlimit = (caddr_t)USERLIMIT32;
335 (void) hat_setup(p->p_as->a_hat, HAT_INIT);
336
337 init_core();
338
339 init_mstate(curthread, LMS_SYSTEM);
340 return (exec_init(p->p_zone->zone_initname, p->p_zone->zone_bootargs));
341 }
342
343 /*
344 * Start the initial user process for the global zone; once running, if
345 * init should subsequently fail, it will be automatically be caught in the
346 * exit(2) path, and restarted by restart_init().
347 */
348 static void
349 start_init(void)
350 {
351 proc_init = curproc;
352
353 ASSERT(curproc->p_zone->zone_initname != NULL);
354
355 if (start_init_common() != 0)
356 halt("unix: Could not start init");
357 lwp_rtt();
358 }
359
360 void
361 main(void)
362 {
363 proc_t *p = ttoproc(curthread); /* &p0 */
364 int (**initptr)();
365 extern void sched();
366 extern void fsflush();
367 extern void interrupt_balancer();
368 extern int (*init_tbl[])();
369 extern int (*mp_init_tbl[])();
370 extern id_t syscid, defaultcid;
371 extern int swaploaded;
372 extern int netboot;
373 extern ib_boot_prop_t *iscsiboot_prop;
374 extern void vm_init(void);
375 extern void cbe_init_pre(void);
376 extern void cbe_init(void);
377 extern void clock_tick_init_pre(void);
378 extern void clock_tick_init_post(void);
379 extern void clock_init(void);
380 extern void physio_bufs_init(void);
381 extern void pm_cfb_setup_intr(void);
382 extern int pm_adjust_timestamps(dev_info_t *, void *);
383 extern void start_other_cpus(int);
384 extern void sysevent_evc_thrinit();
385 extern kmutex_t ualock;
386 #if defined(__x86)
387 extern void fastboot_post_startup(void);
388 extern void progressbar_start(void);
389 #endif
390 /*
391 * In the horrible world of x86 in-lines, you can't get symbolic
392 * structure offsets a la genassym. This assertion is here so
393 * that the next poor slob who innocently changes the offset of
394 * cpu_thread doesn't waste as much time as I just did finding
395 * out that it's hard-coded in i86/ml/i86.il. Similarly for
396 * curcpup. You're welcome.
397 */
398 ASSERT(CPU == CPU->cpu_self);
399 ASSERT(curthread == CPU->cpu_thread);
400 ASSERT_STACK_ALIGNED();
401
402 /*
403 * We take the ualock until we have completed the startup
404 * to prevent kadmin() from disrupting this work. In particular,
405 * we don't want kadmin() to bring the system down while we are
406 * trying to start it up.
407 */
408 mutex_enter(&ualock);
409
410 /*
411 * Setup root lgroup and leaf lgroup for CPU 0
412 */
413 lgrp_init(LGRP_INIT_STAGE2);
414
415 /*
416 * Once 'startup()' completes, the thread_reaper() daemon would be
417 * created(in thread_init()). After that, it is safe to create threads
418 * that could exit. These exited threads will get reaped.
419 */
420 startup();
421 segkmem_gc();
422 callb_init();
423 cbe_init_pre(); /* x86 must initialize gethrtimef before timer_init */
424 ddi_periodic_init();
425 cbe_init();
426 callout_init(); /* callout table MUST be init'd after cyclics */
427 clock_tick_init_pre();
428 clock_init();
429
430 #if defined(__x86)
431 /*
432 * The progressbar thread uses cv_reltimedwait() and hence needs to be
433 * started after the callout mechanism has been initialized.
434 */
435 progressbar_start();
436 #endif
437 /*
438 * On some platforms, clkinitf() changes the timing source that
439 * gethrtime_unscaled() uses to generate timestamps. cbe_init() calls
440 * clkinitf(), so re-initialize the microstate counters after the
441 * timesource has been chosen.
442 */
443 init_mstate(&t0, LMS_SYSTEM);
444 init_cpu_mstate(CPU, CMS_SYSTEM);
445
446 /*
447 * May need to probe to determine latencies from CPU 0 after
448 * gethrtime() comes alive in cbe_init() and before enabling interrupts
449 * and copy and release any temporary memory allocated with BOP_ALLOC()
450 * before release_bootstrap() frees boot memory
451 */
452 lgrp_init(LGRP_INIT_STAGE3);
453
454 /*
455 * Call all system initialization functions.
456 */
457 for (initptr = &init_tbl[0]; *initptr; initptr++)
458 (**initptr)();
459 /*
460 * Load iSCSI boot properties
461 */
462 ld_ib_prop();
463 /*
464 * initialize vm related stuff.
465 */
466 vm_init();
467
468 /*
469 * initialize buffer pool for raw I/O requests
470 */
471 physio_bufs_init();
472
473 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */
474
475 /*
476 * Drop the interrupt level and allow interrupts. At this point
477 * the DDI guarantees that interrupts are enabled.
478 */
479 (void) spl0();
480 interrupts_unleashed = 1;
481
482 /*
483 * Create kmem cache for proc structures
484 */
485 process_cache = kmem_cache_create("process_cache", sizeof (proc_t),
486 0, NULL, NULL, NULL, NULL, NULL, 0);
487
488 vfs_mountroot(); /* Mount the root file system */
489 errorq_init(); /* after vfs_mountroot() so DDI root is ready */
490 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */
491 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL);
492 /* after vfs_mountroot() so hrestime is valid */
493
494 post_startup();
495 swaploaded = 1;
496
497 /*
498 * Initialize Solaris Audit Subsystem
499 */
500 audit_init();
501
502 /*
503 * Plumb the protocol modules and drivers only if we are not
504 * networked booted, in this case we already did it in rootconf().
505 */
506 if (netboot == 0 && iscsiboot_prop == NULL)
507 (void) strplumb();
508
509 gethrestime(&PTOU(curproc)->u_start);
510 curthread->t_start = PTOU(curproc)->u_start.tv_sec;
511 p->p_mstart = gethrtime();
512
513 /*
514 * Perform setup functions that can only be done after root
515 * and swap have been set up.
516 */
517 consconfig();
518 #ifndef __sparc
519 release_bootstrap();
520 #endif
521
522 /*
523 * attach drivers with ddi-forceattach prop
524 * It must be done early enough to load hotplug drivers (e.g.
525 * pcmcia nexus) so that devices enumerated via hotplug is
526 * available before I/O subsystem is fully initialized.
527 */
528 i_ddi_forceattach_drivers();
529
530 /*
531 * Set the scan rate and other parameters of the paging subsystem.
532 */
533 setupclock(0);
534
535 /*
536 * Initialize process 0's lwp directory and lwpid hash table.
537 */
538 p->p_lwpdir = p->p_lwpfree = p0_lwpdir;
539 p->p_lwpdir->ld_next = p->p_lwpdir + 1;
540 p->p_lwpdir_sz = 2;
541 p->p_tidhash = p0_tidhash;
542 p->p_tidhash_sz = 2;
543 p0_lep.le_thread = curthread;
544 p0_lep.le_lwpid = curthread->t_tid;
545 p0_lep.le_start = curthread->t_start;
546 lwp_hash_in(p, &p0_lep, p0_tidhash, 2, 0);
547
548 /*
549 * Initialize extended accounting.
550 */
551 exacct_init();
552
553 /*
554 * Initialize threads of sysevent event channels
555 */
556 sysevent_evc_thrinit();
557
558 /*
559 * This must be done after post_startup() but before
560 * start_other_cpus()
561 */
562 lgrp_init(LGRP_INIT_STAGE4);
563
564 /*
565 * Perform MP initialization, if any.
566 */
567 start_other_cpus(0);
568
569 #ifdef __sparc
570 /*
571 * Release bootstrap here since PROM interfaces are
572 * used to start other CPUs above.
573 */
574 release_bootstrap();
575 #endif
576
577 /*
578 * Finish lgrp initialization after all CPUS are brought online.
579 */
580 lgrp_init(LGRP_INIT_STAGE5);
581
582 /*
583 * After mp_init(), number of cpus are known (this is
584 * true for the time being, when there are actually
585 * hot pluggable cpus then this scheme would not do).
586 * Any per cpu initialization is done here.
587 */
588 kmem_mp_init();
589 vmem_update(NULL);
590
591 clock_tick_init_post();
592
593 for (initptr = &mp_init_tbl[0]; *initptr; initptr++)
594 (**initptr)();
595
596 /*
597 * These must be called after start_other_cpus
598 */
599 pm_cfb_setup_intr();
600 #if defined(__x86)
601 fastboot_post_startup();
602 #endif
603
604 /*
605 * Make init process; enter scheduling loop with system process.
606 *
607 * Note that we manually assign the pids for these processes, for
608 * historical reasons. If more pre-assigned pids are needed,
609 * FAMOUS_PIDS will have to be updated.
610 */
611
612 /* create init process */
613 if (newproc(start_init, NULL, defaultcid, 59, NULL,
614 FAMOUS_PID_INIT))
615 panic("main: unable to fork init.");
616
617 /* create pageout daemon */
618 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL,
619 FAMOUS_PID_PAGEOUT))
620 panic("main: unable to fork pageout()");
621
622 /* create fsflush daemon */
623 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL,
624 FAMOUS_PID_FSFLUSH))
625 panic("main: unable to fork fsflush()");
626
627 /* create interrupt balancer process */
628 if (newproc(interrupt_balancer, NULL, syscid, minclsyspri, NULL, 0))
629 panic("main: unable to fork interrupt_balancer()");
630
631 /* create cluster process if we're a member of one */
632 if (cluster_bootflags & CLUSTER_BOOTED) {
633 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri,
634 NULL, 0)) {
635 panic("main: unable to fork cluster()");
636 }
637 }
638
639 /*
640 * Create system threads (threads are associated with p0)
641 */
642
643 /* create module uninstall daemon */
644 /* BugID 1132273. If swapping over NFS need a bigger stack */
645 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon,
646 NULL, 0, &p0, TS_RUN, minclsyspri);
647
648 (void) thread_create(NULL, 0, seg_pasync_thread,
649 NULL, 0, &p0, TS_RUN, minclsyspri);
650
651 pid_setmin();
652
653 /* system is now ready */
654 mutex_exit(&ualock);
655
656 bcopy("sched", PTOU(curproc)->u_psargs, 6);
657 bcopy("sched", PTOU(curproc)->u_comm, 5);
658 sched();
659 /* NOTREACHED */
660 }