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_timer.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 * Plumb the protocol modules and drivers only if we are not
502 * networked booted, in this case we already did it in rootconf().
503 */
504 if (netboot == 0 && iscsiboot_prop == NULL)
505 (void) strplumb();
506
507 gethrestime(&PTOU(curproc)->u_start);
508 curthread->t_start = PTOU(curproc)->u_start.tv_sec;
509 p->p_mstart = gethrtime();
510
511 /*
512 * Perform setup functions that can only be done after root
513 * and swap have been set up.
514 */
515 consconfig();
516 #ifndef __sparc
517 release_bootstrap();
518 #endif
519
520 /*
521 * attach drivers with ddi-forceattach prop
522 * It must be done early enough to load hotplug drivers (e.g.
523 * pcmcia nexus) so that devices enumerated via hotplug is
524 * available before I/O subsystem is fully initialized.
525 */
526 i_ddi_forceattach_drivers();
527
528 /*
529 * Set the scan rate and other parameters of the paging subsystem.
530 */
531 setupclock(0);
532
533 /*
534 * Initialize process 0's lwp directory and lwpid hash table.
535 */
536 p->p_lwpdir = p->p_lwpfree = p0_lwpdir;
537 p->p_lwpdir->ld_next = p->p_lwpdir + 1;
538 p->p_lwpdir_sz = 2;
539 p->p_tidhash = p0_tidhash;
540 p->p_tidhash_sz = 2;
541 p0_lep.le_thread = curthread;
542 p0_lep.le_lwpid = curthread->t_tid;
543 p0_lep.le_start = curthread->t_start;
544 lwp_hash_in(p, &p0_lep, p0_tidhash, 2, 0);
545
546 /*
547 * Initialize extended accounting.
548 */
549 exacct_init();
550
551 /*
552 * Initialize threads of sysevent event channels
553 */
554 sysevent_evc_thrinit();
555
556 /*
557 * This must be done after post_startup() but before
558 * start_other_cpus()
559 */
560 lgrp_init(LGRP_INIT_STAGE4);
561
562 /*
563 * Perform MP initialization, if any.
564 */
565 start_other_cpus(0);
566
567 #ifdef __sparc
568 /*
569 * Release bootstrap here since PROM interfaces are
570 * used to start other CPUs above.
571 */
572 release_bootstrap();
573 #endif
574
575 /*
576 * Finish lgrp initialization after all CPUS are brought online.
577 */
578 lgrp_init(LGRP_INIT_STAGE5);
579
580 /*
581 * After mp_init(), number of cpus are known (this is
582 * true for the time being, when there are actually
583 * hot pluggable cpus then this scheme would not do).
584 * Any per cpu initialization is done here.
585 */
586 kmem_mp_init();
587 vmem_update(NULL);
588
589 clock_tick_init_post();
590
591 for (initptr = &mp_init_tbl[0]; *initptr; initptr++)
592 (**initptr)();
593
594 /*
595 * These must be called after start_other_cpus
596 */
597 pm_cfb_setup_intr();
598 #if defined(__x86)
599 fastboot_post_startup();
600 #endif
601
602 /*
603 * Make init process; enter scheduling loop with system process.
604 *
605 * Note that we manually assign the pids for these processes, for
606 * historical reasons. If more pre-assigned pids are needed,
607 * FAMOUS_PIDS will have to be updated.
608 */
609
610 /* create init process */
611 if (newproc(start_init, NULL, defaultcid, 59, NULL,
612 FAMOUS_PID_INIT))
613 panic("main: unable to fork init.");
614
615 /* create pageout daemon */
616 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL,
617 FAMOUS_PID_PAGEOUT))
618 panic("main: unable to fork pageout()");
619
620 /* create fsflush daemon */
621 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL,
622 FAMOUS_PID_FSFLUSH))
623 panic("main: unable to fork fsflush()");
624
625 /* create cluster process if we're a member of one */
626 if (cluster_bootflags & CLUSTER_BOOTED) {
627 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri,
628 NULL, 0)) {
629 panic("main: unable to fork cluster()");
630 }
631 }
632
633 /*
634 * Create system threads (threads are associated with p0)
635 */
636
637 /* create module uninstall daemon */
638 /* BugID 1132273. If swapping over NFS need a bigger stack */
639 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon,
640 NULL, 0, &p0, TS_RUN, minclsyspri);
641
642 (void) thread_create(NULL, 0, seg_pasync_thread,
643 NULL, 0, &p0, TS_RUN, minclsyspri);
644
645 pid_setmin();
646
647 /* system is now ready */
648 mutex_exit(&ualock);
649
650 bcopy("sched", PTOU(curproc)->u_psargs, 6);
651 bcopy("sched", PTOU(curproc)->u_comm, 5);
652 sched();
653 /* NOTREACHED */
654 }