Rename printf -> kprintf in sys/ and add some defines where necessary
[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 $
6ea70f76 43 * $DragonFly: src/sys/kern/init_main.c,v 1.68 2006/12/23 00:35:03 swildner 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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78/* Components of the first process -- never freed. */
79static struct session session0;
80static struct pgrp pgrp0;
984263bc 81static struct procsig procsig0;
0679adc4 82static struct filedesc filedesc0;
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83static struct plimit limit0;
84static struct vmspace vmspace0;
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85struct proc *initproc;
86struct proc proc0;
87struct thread thread0;
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88
89int cmask = CMASK;
90extern struct user *proc0paddr;
91extern int fallback_elf_brand;
92
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93int boothowto = 0; /* initialized so that it can be patched */
94SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
95
96/*
97 * This ensures that there is at least one entry so that the sysinit_set
98 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
99 * executed.
100 */
101SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
102
103/*
104 * The sysinit table itself. Items are checked off as the are run.
105 * If we want to register new sysinit types, add them to newsysinit.
106 */
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107SET_DECLARE(sysinit_set, struct sysinit);
108struct sysinit **sysinit, **sysinit_end;
109struct sysinit **newsysinit, **newsysinit_end;
110
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111
112/*
113 * Merge a new sysinit set into the current set, reallocating it if
114 * necessary. This can only be called after malloc is running.
115 */
116void
dc62b251 117sysinit_add(struct sysinit **set, struct sysinit **set_end)
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118{
119 struct sysinit **newset;
120 struct sysinit **sipp;
121 struct sysinit **xipp;
dc62b251 122 int count;
984263bc 123
dc62b251 124 count = set_end - set;
984263bc 125 if (newsysinit)
dc62b251 126 count += newsysinit_end - newsysinit;
984263bc 127 else
dc62b251 128 count += sysinit_end - sysinit;
efda3bd0 129 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK);
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130 if (newset == NULL)
131 panic("cannot malloc for sysinit");
132 xipp = newset;
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133 if (newsysinit) {
134 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
984263bc 135 *xipp++ = *sipp;
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136 } else {
137 for (sipp = sysinit; sipp < sysinit_end; sipp++)
984263bc 138 *xipp++ = *sipp;
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139 }
140 for (sipp = set; sipp < set_end; sipp++)
984263bc 141 *xipp++ = *sipp;
984263bc 142 if (newsysinit)
efda3bd0 143 kfree(newsysinit, M_TEMP);
984263bc 144 newsysinit = newset;
dc62b251 145 newsysinit_end = newset + count;
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146}
147
148/*
149 * System startup; initialize the world, create process 0, mount root
150 * filesystem, and fork to create init and pagedaemon. Most of the
151 * hard work is done in the lower-level initialization routines including
152 * startup(), which does memory initialization and autoconfiguration.
153 *
154 * This allows simple addition of new kernel subsystems that require
155 * boot time initialization. It also allows substitution of subsystem
156 * (for instance, a scheduler, kernel profiler, or VM system) by object
157 * module. Finally, it allows for optional "kernel threads".
158 */
159void
160mi_startup(void)
161{
8a8d5d85 162 struct sysinit *sip; /* system initialization*/
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163 struct sysinit **sipp; /* system initialization*/
164 struct sysinit **xipp; /* interior loop of sort*/
165 struct sysinit *save; /* bubble*/
984263bc 166
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167 if (sysinit == NULL) {
168 sysinit = SET_BEGIN(sysinit_set);
169 sysinit_end = SET_LIMIT(sysinit_set);
170 }
171
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172restart:
173 /*
174 * Perform a bubble sort of the system initialization objects by
175 * their subsystem (primary key) and order (secondary key).
176 */
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177 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
178 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
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179 if ((*sipp)->subsystem < (*xipp)->subsystem ||
180 ((*sipp)->subsystem == (*xipp)->subsystem &&
181 (*sipp)->order <= (*xipp)->order))
182 continue; /* skip*/
183 save = *sipp;
184 *sipp = *xipp;
185 *xipp = save;
186 }
187 }
188
189 /*
190 * Traverse the (now) ordered list of system initialization tasks.
191 * Perform each task, and continue on to the next task.
192 *
193 * The last item on the list is expected to be the scheduler,
194 * which will not return.
195 */
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196 for (sipp = sysinit; sipp < sysinit_end; sipp++) {
197 sip = *sipp;
8a8d5d85 198 if (sip->subsystem == SI_SUB_DUMMY)
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199 continue; /* skip dummy task(s)*/
200
8a8d5d85 201 if (sip->subsystem == SI_SUB_DONE)
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202 continue;
203
204 /* Call function */
8a8d5d85 205 (*(sip->func))(sip->udata);
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206
207 /* Check off the one we're just done */
8a8d5d85 208 sip->subsystem = SI_SUB_DONE;
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209
210 /* Check if we've installed more sysinit items via KLD */
211 if (newsysinit != NULL) {
dc62b251 212 if (sysinit != SET_BEGIN(sysinit_set))
efda3bd0 213 kfree(sysinit, M_TEMP);
984263bc 214 sysinit = newsysinit;
dc62b251 215 sysinit_end = newsysinit_end;
984263bc 216 newsysinit = NULL;
dc62b251 217 newsysinit_end = NULL;
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218 goto restart;
219 }
220 }
221
222 panic("Shouldn't get here!");
223 /* NOTREACHED*/
224}
225
226
227/*
228 ***************************************************************************
229 ****
230 **** The following SYSINIT's belong elsewhere, but have not yet
231 **** been moved.
232 ****
233 ***************************************************************************
234 */
235static void
236print_caddr_t(void *data __unused)
237{
6ea70f76 238 kprintf("%s", (char *)data);
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239}
240SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
241
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242/*
243 * Leave the critical section that protected us from spurious interrupts
244 * so device probes work.
245 */
246static void
247leavecrit(void *dummy __unused)
248{
249 crit_exit();
250 KKASSERT(!IN_CRITICAL_SECT(curthread));
251 if (bootverbose)
6ea70f76 252 kprintf("Leaving critical section, allowing interrupts\n");
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253}
254SYSINIT(leavecrit, SI_SUB_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
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255
256/*
257 ***************************************************************************
258 ****
259 **** The two following SYSINT's are proc0 specific glue code. I am not
260 **** convinced that they can not be safely combined, but their order of
261 **** operation has been maintained as the same as the original init_main.c
262 **** for right now.
263 ****
264 **** These probably belong in init_proc.c or kern_proc.c, since they
265 **** deal with proc0 (the fork template process).
266 ****
267 ***************************************************************************
268 */
269/* ARGSUSED*/
270static void
271proc0_init(void *dummy __unused)
272{
0679adc4 273 struct proc *p;
81eea9f4 274 struct lwp *lp;
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275
276 p = &proc0;
81eea9f4 277 lp = &proc0.p_lwp; /* XXX lwp to be: lwp0 */
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278
279 /*
280 * Initialize process and pgrp structures.
281 */
282 procinit();
283
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284 /*
285 * additional VM structures
286 */
287 vm_init2();
288
289 /*
290 * Create process 0 (the swapper).
291 */
292 LIST_INSERT_HEAD(&allproc, p, p_list);
293 p->p_pgrp = &pgrp0;
294 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
295 LIST_INIT(&pgrp0.pg_members);
296 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
297
298 pgrp0.pg_session = &session0;
299 session0.s_count = 1;
300 session0.s_leader = p;
301
302 p->p_sysent = &aout_sysvec;
303
344ad853 304 p->p_flag = P_SYSTEM;
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305 p->p_stat = SRUN;
306 p->p_nice = NZERO;
307 p->p_rtprio.type = RTP_PRIO_NORMAL;
308 p->p_rtprio.prio = 0;
b19f1310 309 p->p_lwp.lwp_rtprio = p->p_rtprio;
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310
311 p->p_peers = 0;
312 p->p_leader = p;
313
314 bcopy("swapper", p->p_comm, sizeof ("swapper"));
81eea9f4 315 bcopy("swapper", thread0.td_comm, sizeof ("swapper"));
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316
317 /* Create credentials. */
984263bc 318 p->p_ucred = crget();
41c20dac 319 p->p_ucred->cr_ruidinfo = uifind(0);
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320 p->p_ucred->cr_ngroups = 1; /* group 0 */
321 p->p_ucred->cr_uidinfo = uifind(0);
322
323 /* Don't jail it */
41c20dac 324 p->p_ucred->cr_prison = NULL;
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325
326 /* Create procsig. */
327 p->p_procsig = &procsig0;
328 p->p_procsig->ps_refcnt = 1;
329
330 /* Initialize signal state for process 0. */
c0b8a06d 331 siginit(p);
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332
333 /* Create the file descriptor table. */
228b401d 334 fdinit_bootstrap(p, &filedesc0, cmask);
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335
336 /* Create the limits structures. */
c0b8a06d 337 plimit_init0(&limit0);
984263bc 338 p->p_limit = &limit0;
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339
340 /* Allocate a prototype map so we have something to fork. */
341 pmap_pinit0(vmspace_pmap(&vmspace0));
342 p->p_vmspace = &vmspace0;
343 vmspace0.vm_refcnt = 1;
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344 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_USER_ADDRESS),
345 trunc_page(VM_MAX_USER_ADDRESS));
984263bc 346 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
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347
348 /*
349 * We continue to place resource usage info and signal
350 * actions in the user struct so they're pageable.
351 */
352 p->p_stats = &p->p_addr->u_stats;
353 p->p_sigacts = &p->p_addr->u_sigacts;
354
355 /*
356 * Charge root for one process.
357 */
41c20dac 358 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
984263bc 359
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360}
361SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
362
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363static int proc0_post_callback(struct proc *p, void *data __unused);
364
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365/* ARGSUSED*/
366static void
367proc0_post(void *dummy __unused)
368{
369 struct timespec ts;
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370
371 /*
372 * Now we can look at the time, having had a chance to verify the
373 * time from the file system. Pretend that proc0 started now.
374 */
8fa76237 375 allproc_scan(proc0_post_callback, NULL);
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376
377 /*
378 * Give the ``random'' number generator a thump.
379 * XXX: Does read_random() contain enough bits to be used here ?
380 */
381 nanotime(&ts);
cddfb7bb 382 skrandom(ts.tv_sec ^ ts.tv_nsec);
984263bc 383}
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384
385static int
386proc0_post_callback(struct proc *p, void *data __unused)
387{
388 microtime(&p->p_start);
389 return(0);
390}
391
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392SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
393
394/*
395 ***************************************************************************
396 ****
397 **** The following SYSINIT's and glue code should be moved to the
398 **** respective files on a per subsystem basis.
399 ****
400 ***************************************************************************
401 */
402
403
404/*
405 ***************************************************************************
406 ****
407 **** The following code probably belongs in another file, like
408 **** kern/init_init.c.
409 ****
410 ***************************************************************************
411 */
412
413/*
414 * List of paths to try when searching for "init".
415 */
416static char init_path[MAXPATHLEN] =
417#ifdef INIT_PATH
418 __XSTRING(INIT_PATH);
419#else
420 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
421#endif
422SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
423
424/*
425 * Start the initial user process; try exec'ing each pathname in init_path.
426 * The program is invoked with one argument containing the boot flags.
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427 *
428 * The MP lock is held on entry.
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429 */
430static void
431start_init(void *dummy)
432{
433 vm_offset_t addr;
434 struct execve_args args;
435 int options, error;
436 char *var, *path, *next, *s;
437 char *ucp, **uap, *arg0, *arg1;
438 struct proc *p;
553ea3c8 439 struct lwp *lp;
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440 struct mount *mp;
441 struct vnode *vp;
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442
443 p = curproc;
444
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445 KKASSERT(p->p_nthreads == 1);
446
447 lp = LIST_FIRST(&p->p_lwps);
448
984263bc 449 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
861905fb 450 mp = mountlist_boot_getfirst();
21739618 451 if (VFS_ROOT(mp, &vp))
984263bc 452 panic("cannot find root vnode");
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453 if (mp->mnt_ncmountpt.ncp == NULL) {
454 cache_allocroot(&mp->mnt_ncmountpt, mp, vp);
455 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */
8c361dda 456 }
21739618 457 p->p_fd->fd_cdir = vp;
597aea93 458 vref(p->p_fd->fd_cdir);
21739618 459 p->p_fd->fd_rdir = vp;
597aea93 460 vref(p->p_fd->fd_rdir);
28623bf9 461 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt));
a11aaa81 462 vn_unlock(vp); /* leave ref intact */
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463 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir);
464 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir);
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465
466 /*
467 * Need just enough stack to hold the faked-up "execve()" arguments.
468 */
469 addr = trunc_page(USRSTACK - PAGE_SIZE);
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470 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
471 FALSE,
472 VM_MAPTYPE_NORMAL,
473 VM_PROT_ALL, VM_PROT_ALL,
474 0);
475 if (error)
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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
bc01a404 480 if ((var = kgetenv("init_path")) != NULL) {
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481 strncpy(init_path, var, sizeof init_path);
482 init_path[sizeof init_path - 1] = 0;
483 }
bc01a404 484 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL)
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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)
6ea70f76 495 kprintf("start_init: trying %.*s\n", (int)(next - path),
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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
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555 * acquiring the current user process designation. The
556 * MP lock will migrate with us though so we still have to
557 * release it.
984263bc 558 */
753fd850 559 if ((error = sys_execve(&args)) == 0) {
8a8d5d85 560 rel_mplock();
52eedfb5 561 lp->lwp_proc->p_usched->acquire_curproc(lp);
984263bc 562 return;
8a8d5d85 563 }
984263bc 564 if (error != ENOENT)
6ea70f76 565 kprintf("exec %.*s: error %d\n", (int)(next - path),
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566 path, error);
567 }
6ea70f76 568 kprintf("init: not found in path %s\n", init_path);
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569 panic("no init");
570}
571
572/*
573 * Like kthread_create(), but runs in it's own address space.
574 * We do this early to reserve pid 1.
575 *
576 * Note special case - do not make it runnable yet. Other work
577 * in progress will change this more.
578 */
579static void
580create_init(const void *udata __unused)
581{
582 int error;
bb3cd951 583 struct lwp *lp;
984263bc 584
e43a034f 585 crit_enter();
553ea3c8 586 error = fork1(&proc0.p_lwp, RFFDG | RFPROC, &initproc);
984263bc 587 if (error)
fc92d4aa 588 panic("cannot fork init: %d", error);
344ad853 589 initproc->p_flag |= P_SYSTEM;
bb3cd951
SS
590 lp = LIST_FIRST(&initproc->p_lwps);
591 cpu_set_fork_handler(lp, start_init, NULL);
e43a034f 592 crit_exit();
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593}
594SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
595
596/*
597 * Make it runnable now.
598 */
599static void
600kick_init(const void *udata __unused)
601{
553ea3c8 602 start_forked_proc(&proc0.p_lwp, initproc);
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603}
604SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
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605
606/*
607 * Machine independant globaldata initialization
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608 *
609 * WARNING! Called from early boot, 'mycpu' may not work yet.
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610 */
611void
d0e06f83 612mi_gdinit(struct globaldata *gd, int cpuid)
8ad65e08 613{
85100692 614 TAILQ_INIT(&gd->gd_tdfreeq); /* for pmap_{new,dispose}_thread() */
88c4d2f6 615 TAILQ_INIT(&gd->gd_systimerq);
d0e06f83 616 gd->gd_cpuid = cpuid;
fda1ad89 617 gd->gd_cpumask = (cpumask_t)1 << cpuid;
8ad65e08 618 lwkt_gdinit(gd);
41a01a4d 619 vm_map_entry_reserve_cpu_init(gd);
fc17ad60 620 sleep_gdinit(gd);
8ad65e08
MD
621}
622
623