Add SI_SUB_LOCK as sysinit priority for the initialisation of tokens and
[dragonfly.git] / sys / kern / init_main.c
CommitLineData
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1/*
2 * Copyright (c) 1995 Terrence R. Lambert
3 * All rights reserved.
4 *
5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 * must display the following acknowledgement:
23 * This product includes software developed by the University of
24 * California, Berkeley and its contributors.
25 * 4. Neither the name of the University nor the names of its contributors
26 * may be used to endorse or promote products derived from this software
27 * without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 * SUCH DAMAGE.
40 *
41 * @(#)init_main.c 8.9 (Berkeley) 1/21/94
42 * $FreeBSD: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $
41a01a4d 43 * $DragonFly: src/sys/kern/init_main.c,v 1.28 2004/03/01 06:33:16 dillon Exp $
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44 */
45
46#include "opt_init_path.h"
47
48#include <sys/param.h>
49#include <sys/file.h>
50#include <sys/filedesc.h>
51#include <sys/kernel.h>
52#include <sys/mount.h>
53#include <sys/sysctl.h>
54#include <sys/proc.h>
55#include <sys/resourcevar.h>
56#include <sys/signalvar.h>
57#include <sys/systm.h>
58#include <sys/vnode.h>
59#include <sys/sysent.h>
60#include <sys/reboot.h>
61#include <sys/sysproto.h>
62#include <sys/vmmeter.h>
63#include <sys/unistd.h>
64#include <sys/malloc.h>
dadab5e9 65#include <sys/file2.h>
f8c3996b 66#include <sys/thread2.h>
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67
68#include <machine/cpu.h>
69
70#include <vm/vm.h>
71#include <vm/vm_param.h>
72#include <sys/lock.h>
73#include <vm/pmap.h>
74#include <vm/vm_map.h>
75#include <sys/user.h>
76#include <sys/copyright.h>
77
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78void mi_startup(void); /* Should be elsewhere */
79
80/* Components of the first process -- never freed. */
81static struct session session0;
82static struct pgrp pgrp0;
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83static struct procsig procsig0;
84static struct filedesc0 filedesc0;
85static struct plimit limit0;
86static struct vmspace vmspace0;
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87struct proc *initproc;
88struct proc proc0;
89struct thread thread0;
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90
91int cmask = CMASK;
92extern struct user *proc0paddr;
93extern int fallback_elf_brand;
94
95struct vnode *rootvp;
96int boothowto = 0; /* initialized so that it can be patched */
97SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
98
99/*
100 * This ensures that there is at least one entry so that the sysinit_set
101 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
102 * executed.
103 */
104SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
105
106/*
107 * The sysinit table itself. Items are checked off as the are run.
108 * If we want to register new sysinit types, add them to newsysinit.
109 */
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110SET_DECLARE(sysinit_set, struct sysinit);
111struct sysinit **sysinit, **sysinit_end;
112struct sysinit **newsysinit, **newsysinit_end;
113
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114
115/*
116 * Merge a new sysinit set into the current set, reallocating it if
117 * necessary. This can only be called after malloc is running.
118 */
119void
dc62b251 120sysinit_add(struct sysinit **set, struct sysinit **set_end)
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121{
122 struct sysinit **newset;
123 struct sysinit **sipp;
124 struct sysinit **xipp;
dc62b251 125 int count;
984263bc 126
dc62b251 127 count = set_end - set;
984263bc 128 if (newsysinit)
dc62b251 129 count += newsysinit_end - newsysinit;
984263bc 130 else
dc62b251 131 count += sysinit_end - sysinit;
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132 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
133 if (newset == NULL)
134 panic("cannot malloc for sysinit");
135 xipp = newset;
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136 if (newsysinit) {
137 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
984263bc 138 *xipp++ = *sipp;
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139 } else {
140 for (sipp = sysinit; sipp < sysinit_end; sipp++)
984263bc 141 *xipp++ = *sipp;
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142 }
143 for (sipp = set; sipp < set_end; sipp++)
984263bc 144 *xipp++ = *sipp;
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145 if (newsysinit)
146 free(newsysinit, M_TEMP);
147 newsysinit = newset;
dc62b251 148 newsysinit_end = newset + count;
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149}
150
151/*
152 * System startup; initialize the world, create process 0, mount root
153 * filesystem, and fork to create init and pagedaemon. Most of the
154 * hard work is done in the lower-level initialization routines including
155 * startup(), which does memory initialization and autoconfiguration.
156 *
157 * This allows simple addition of new kernel subsystems that require
158 * boot time initialization. It also allows substitution of subsystem
159 * (for instance, a scheduler, kernel profiler, or VM system) by object
160 * module. Finally, it allows for optional "kernel threads".
161 */
162void
163mi_startup(void)
164{
8a8d5d85 165 struct sysinit *sip; /* system initialization*/
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166 struct sysinit **sipp; /* system initialization*/
167 struct sysinit **xipp; /* interior loop of sort*/
168 struct sysinit *save; /* bubble*/
984263bc 169
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170 if (sysinit == NULL) {
171 sysinit = SET_BEGIN(sysinit_set);
172 sysinit_end = SET_LIMIT(sysinit_set);
173 }
174
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175restart:
176 /*
177 * Perform a bubble sort of the system initialization objects by
178 * their subsystem (primary key) and order (secondary key).
179 */
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180 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
181 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
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182 if ((*sipp)->subsystem < (*xipp)->subsystem ||
183 ((*sipp)->subsystem == (*xipp)->subsystem &&
184 (*sipp)->order <= (*xipp)->order))
185 continue; /* skip*/
186 save = *sipp;
187 *sipp = *xipp;
188 *xipp = save;
189 }
190 }
191
192 /*
193 * Traverse the (now) ordered list of system initialization tasks.
194 * Perform each task, and continue on to the next task.
195 *
196 * The last item on the list is expected to be the scheduler,
197 * which will not return.
198 */
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199 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
200 sip = *sipp;
8a8d5d85 201 if (sip->subsystem == SI_SUB_DUMMY)
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202 continue; /* skip dummy task(s)*/
203
8a8d5d85 204 if (sip->subsystem == SI_SUB_DONE)
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205 continue;
206
207 /* Call function */
8a8d5d85 208 (*(sip->func))(sip->udata);
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209
210 /* Check off the one we're just done */
8a8d5d85 211 sip->subsystem = SI_SUB_DONE;
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212
213 /* Check if we've installed more sysinit items via KLD */
214 if (newsysinit != NULL) {
dc62b251 215 if (sysinit != SET_BEGIN(sysinit_set))
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216 free(sysinit, M_TEMP);
217 sysinit = newsysinit;
dc62b251 218 sysinit_end = newsysinit_end;
984263bc 219 newsysinit = NULL;
dc62b251 220 newsysinit_end = NULL;
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221 goto restart;
222 }
223 }
224
225 panic("Shouldn't get here!");
226 /* NOTREACHED*/
227}
228
229
230/*
231 ***************************************************************************
232 ****
233 **** The following SYSINIT's belong elsewhere, but have not yet
234 **** been moved.
235 ****
236 ***************************************************************************
237 */
238static void
239print_caddr_t(void *data __unused)
240{
241 printf("%s", (char *)data);
242}
243SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
244
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245/*
246 * Leave the critical section that protected us from spurious interrupts
247 * so device probes work.
248 */
249static void
250leavecrit(void *dummy __unused)
251{
252 crit_exit();
253 KKASSERT(!IN_CRITICAL_SECT(curthread));
254 if (bootverbose)
255 printf("Leaving critical section, allowing interrupts\n");
256}
257SYSINIT(leavecrit, SI_SUB_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
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258
259/*
260 ***************************************************************************
261 ****
262 **** The two following SYSINT's are proc0 specific glue code. I am not
263 **** convinced that they can not be safely combined, but their order of
264 **** operation has been maintained as the same as the original init_main.c
265 **** for right now.
266 ****
267 **** These probably belong in init_proc.c or kern_proc.c, since they
268 **** deal with proc0 (the fork template process).
269 ****
270 ***************************************************************************
271 */
272/* ARGSUSED*/
273static void
274proc0_init(void *dummy __unused)
275{
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276 struct proc *p;
277 struct filedesc0 *fdp;
278 unsigned i;
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279
280 p = &proc0;
281
282 /*
283 * Initialize process and pgrp structures.
284 */
285 procinit();
286
287 /*
288 * Initialize sleep queue hash table
289 */
290 sleepinit();
291
292 /*
293 * additional VM structures
294 */
295 vm_init2();
296
297 /*
298 * Create process 0 (the swapper).
299 */
300 LIST_INSERT_HEAD(&allproc, p, p_list);
301 p->p_pgrp = &pgrp0;
302 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
303 LIST_INIT(&pgrp0.pg_members);
304 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
305
306 pgrp0.pg_session = &session0;
307 session0.s_count = 1;
308 session0.s_leader = p;
309
310 p->p_sysent = &aout_sysvec;
311
a2a5ad0d 312 p->p_flag = P_INMEM | P_SYSTEM | P_CP_RELEASED;
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313 p->p_stat = SRUN;
314 p->p_nice = NZERO;
315 p->p_rtprio.type = RTP_PRIO_NORMAL;
316 p->p_rtprio.prio = 0;
317
318 p->p_peers = 0;
319 p->p_leader = p;
320
321 bcopy("swapper", p->p_comm, sizeof ("swapper"));
322
323 /* Create credentials. */
984263bc 324 p->p_ucred = crget();
41c20dac 325 p->p_ucred->cr_ruidinfo = uifind(0);
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326 p->p_ucred->cr_ngroups = 1; /* group 0 */
327 p->p_ucred->cr_uidinfo = uifind(0);
328
329 /* Don't jail it */
41c20dac 330 p->p_ucred->cr_prison = NULL;
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331
332 /* Create procsig. */
333 p->p_procsig = &procsig0;
334 p->p_procsig->ps_refcnt = 1;
335
336 /* Initialize signal state for process 0. */
337 siginit(&proc0);
338
339 /* Create the file descriptor table. */
340 fdp = &filedesc0;
341 p->p_fd = &fdp->fd_fd;
342 p->p_fdtol = NULL;
343 fdp->fd_fd.fd_refcnt = 1;
344 fdp->fd_fd.fd_cmask = cmask;
345 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
346 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
347 fdp->fd_fd.fd_nfiles = NDFILE;
348
349 /* Create the limits structures. */
350 p->p_limit = &limit0;
351 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
352 limit0.pl_rlimit[i].rlim_cur =
353 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
354 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
355 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
356 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
357 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
12e4aaff 358 i = ptoa(vmstats.v_free_count);
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359 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
360 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
361 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
362 limit0.p_cpulimit = RLIM_INFINITY;
363 limit0.p_refcnt = 1;
364
365 /* Allocate a prototype map so we have something to fork. */
366 pmap_pinit0(vmspace_pmap(&vmspace0));
367 p->p_vmspace = &vmspace0;
368 vmspace0.vm_refcnt = 1;
369 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
370 trunc_page(VM_MAXUSER_ADDRESS));
371 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
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372
373 /*
374 * We continue to place resource usage info and signal
375 * actions in the user struct so they're pageable.
376 */
377 p->p_stats = &p->p_addr->u_stats;
378 p->p_sigacts = &p->p_addr->u_sigacts;
379
380 /*
381 * Charge root for one process.
382 */
41c20dac 383 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
984263bc 384
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385}
386SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
387
388/* ARGSUSED*/
389static void
390proc0_post(void *dummy __unused)
391{
392 struct timespec ts;
393 struct proc *p;
394
395 /*
396 * Now we can look at the time, having had a chance to verify the
397 * time from the file system. Pretend that proc0 started now.
398 */
f62004ad 399 FOREACH_PROC_IN_SYSTEM(p) {
984263bc 400 microtime(&p->p_stats->p_start);
984263bc 401 }
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402
403 /*
404 * Give the ``random'' number generator a thump.
405 * XXX: Does read_random() contain enough bits to be used here ?
406 */
407 nanotime(&ts);
408 srandom(ts.tv_sec ^ ts.tv_nsec);
409}
410SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
411
412/*
413 ***************************************************************************
414 ****
415 **** The following SYSINIT's and glue code should be moved to the
416 **** respective files on a per subsystem basis.
417 ****
418 ***************************************************************************
419 */
420
421
422/*
423 ***************************************************************************
424 ****
425 **** The following code probably belongs in another file, like
426 **** kern/init_init.c.
427 ****
428 ***************************************************************************
429 */
430
431/*
432 * List of paths to try when searching for "init".
433 */
434static char init_path[MAXPATHLEN] =
435#ifdef INIT_PATH
436 __XSTRING(INIT_PATH);
437#else
438 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
439#endif
440SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
441
442/*
443 * Start the initial user process; try exec'ing each pathname in init_path.
444 * The program is invoked with one argument containing the boot flags.
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445 *
446 * The MP lock is held on entry.
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447 */
448static void
449start_init(void *dummy)
450{
451 vm_offset_t addr;
452 struct execve_args args;
453 int options, error;
454 char *var, *path, *next, *s;
455 char *ucp, **uap, *arg0, *arg1;
456 struct proc *p;
457
458 p = curproc;
459
460 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
461 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
462 panic("cannot find root vnode");
463 p->p_fd->fd_cdir = rootvnode;
464 VREF(p->p_fd->fd_cdir);
465 p->p_fd->fd_rdir = rootvnode;
466 VREF(p->p_fd->fd_rdir);
7ea21ed1 467 vfs_cache_setroot(rootvnode);
41a01a4d 468 VOP_UNLOCK(rootvnode, NULL, 0, curthread);
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469
470 /*
471 * Need just enough stack to hold the faked-up "execve()" arguments.
472 */
473 addr = trunc_page(USRSTACK - PAGE_SIZE);
474 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
475 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
476 panic("init: couldn't allocate argument space");
477 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
478 p->p_vmspace->vm_ssize = 1;
479
480 if ((var = getenv("init_path")) != NULL) {
481 strncpy(init_path, var, sizeof init_path);
482 init_path[sizeof init_path - 1] = 0;
483 }
484 if ((var = getenv("kern.fallback_elf_brand")) != NULL)
485 fallback_elf_brand = strtol(var, NULL, 0);
486
487 for (path = init_path; *path != '\0'; path = next) {
488 while (*path == ':')
489 path++;
490 if (*path == '\0')
491 break;
492 for (next = path; *next != '\0' && *next != ':'; next++)
493 /* nothing */ ;
494 if (bootverbose)
495 printf("start_init: trying %.*s\n", (int)(next - path),
496 path);
497
498 /*
499 * Move out the boot flag argument.
500 */
501 options = 0;
502 ucp = (char *)USRSTACK;
503 (void)subyte(--ucp, 0); /* trailing zero */
504 if (boothowto & RB_SINGLE) {
505 (void)subyte(--ucp, 's');
506 options = 1;
507 }
508#ifdef notyet
509 if (boothowto & RB_FASTBOOT) {
510 (void)subyte(--ucp, 'f');
511 options = 1;
512 }
513#endif
514
515#ifdef BOOTCDROM
516 (void)subyte(--ucp, 'C');
517 options = 1;
518#endif
519 if (options == 0)
520 (void)subyte(--ucp, '-');
521 (void)subyte(--ucp, '-'); /* leading hyphen */
522 arg1 = ucp;
523
524 /*
525 * Move out the file name (also arg 0).
526 */
527 (void)subyte(--ucp, 0);
528 for (s = next - 1; s >= path; s--)
529 (void)subyte(--ucp, *s);
530 arg0 = ucp;
531
532 /*
533 * Move out the arg pointers.
534 */
535 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
536 (void)suword((caddr_t)--uap, (long)0); /* terminator */
537 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
538 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
539
540 /*
541 * Point at the arguments.
542 */
543 args.fname = arg0;
544 args.argv = uap;
545 args.envv = NULL;
546
547 /*
548 * Now try to exec the program. If can't for any reason
549 * other than it doesn't exist, complain.
550 *
551 * Otherwise, return via fork_trampoline() all the way
552 * to user mode as init!
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553 *
554 * WARNING! We may have been moved to another cpu after
555 * acquiring P_CURPROC. The MP lock will migrate with us
556 * though so we still have to release it.
984263bc 557 */
8a8d5d85 558 if ((error = execve(&args)) == 0) {
a2a5ad0d 559 acquire_curproc(p);
8a8d5d85 560 rel_mplock();
984263bc 561 return;
8a8d5d85 562 }
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563 if (error != ENOENT)
564 printf("exec %.*s: error %d\n", (int)(next - path),
565 path, error);
566 }
567 printf("init: not found in path %s\n", init_path);
568 panic("no init");
569}
570
571/*
572 * Like kthread_create(), but runs in it's own address space.
573 * We do this early to reserve pid 1.
574 *
575 * Note special case - do not make it runnable yet. Other work
576 * in progress will change this more.
577 */
578static void
579create_init(const void *udata __unused)
580{
581 int error;
582 int s;
583
584 s = splhigh();
585 error = fork1(&proc0, RFFDG | RFPROC, &initproc);
586 if (error)
587 panic("cannot fork init: %d\n", error);
588 initproc->p_flag |= P_INMEM | P_SYSTEM;
589 cpu_set_fork_handler(initproc, start_init, NULL);
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590 splx(s);
591}
592SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
593
594/*
595 * Make it runnable now.
596 */
597static void
598kick_init(const void *udata __unused)
599{
7d0bac62 600 start_forked_proc(&proc0, initproc);
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601}
602SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
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603
604/*
605 * Machine independant globaldata initialization
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606 *
607 * WARNING! Called from early boot, 'mycpu' may not work yet.
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608 */
609void
d0e06f83 610mi_gdinit(struct globaldata *gd, int cpuid)
8ad65e08 611{
85100692 612 TAILQ_INIT(&gd->gd_tdfreeq); /* for pmap_{new,dispose}_thread() */
88c4d2f6 613 TAILQ_INIT(&gd->gd_systimerq);
d0e06f83 614 gd->gd_cpuid = cpuid;
8ad65e08 615 lwkt_gdinit(gd);
41a01a4d 616 vm_map_entry_reserve_cpu_init(gd);
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617}
618
619