b61ce5b0e6
- p_sflag was mostly protected by PROC_LOCK rather than the PROC_SLOCK or previously the sched_lock. These bugs have existed for some time. - Allow swapout to try each thread in a process individually and then swapin the whole process if any of these fail. This allows us to move most scheduler related swap flags into td_flags. - Keep ki_sflag for backwards compat but change all in source tools to use the new and more correct location of P_INMEM. Reported by: pho Reviewed by: attilio, kib Approved by: re (kensmith)
745 lines
20 KiB
C
745 lines
20 KiB
C
/*-
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* Copyright (c) 1995 Terrence R. Lambert
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* All rights reserved.
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*
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* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)init_main.c 8.9 (Berkeley) 1/21/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include "opt_init_path.h"
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/exec.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/ktr.h>
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#include <sys/lock.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/resourcevar.h>
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#include <sys/systm.h>
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#include <sys/signalvar.h>
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#include <sys/vnode.h>
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#include <sys/sysent.h>
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#include <sys/reboot.h>
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#include <sys/sched.h>
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#include <sys/sx.h>
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#include <sys/sysproto.h>
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#include <sys/vmmeter.h>
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#include <sys/unistd.h>
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#include <sys/malloc.h>
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#include <sys/conf.h>
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#include <machine/cpu.h>
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#include <security/audit/audit.h>
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#include <security/mac/mac_framework.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <sys/copyright.h>
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#include <ddb/ddb.h>
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#include <ddb/db_sym.h>
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void mi_startup(void); /* Should be elsewhere */
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/* Components of the first process -- never freed. */
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static struct session session0;
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static struct pgrp pgrp0;
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struct proc proc0;
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struct thread thread0 __aligned(16);
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struct vmspace vmspace0;
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struct proc *initproc;
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int boothowto = 0; /* initialized so that it can be patched */
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SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
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int bootverbose;
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SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0, "");
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/*
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* This ensures that there is at least one entry so that the sysinit_set
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* symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
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* executed.
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*/
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SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
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/*
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* The sysinit table itself. Items are checked off as the are run.
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* If we want to register new sysinit types, add them to newsysinit.
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*/
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SET_DECLARE(sysinit_set, struct sysinit);
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struct sysinit **sysinit, **sysinit_end;
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struct sysinit **newsysinit, **newsysinit_end;
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/*
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* Merge a new sysinit set into the current set, reallocating it if
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* necessary. This can only be called after malloc is running.
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*/
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void
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sysinit_add(struct sysinit **set, struct sysinit **set_end)
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{
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struct sysinit **newset;
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struct sysinit **sipp;
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struct sysinit **xipp;
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int count;
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count = set_end - set;
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if (newsysinit)
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count += newsysinit_end - newsysinit;
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else
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count += sysinit_end - sysinit;
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newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
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if (newset == NULL)
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panic("cannot malloc for sysinit");
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xipp = newset;
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if (newsysinit)
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for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
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*xipp++ = *sipp;
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else
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for (sipp = sysinit; sipp < sysinit_end; sipp++)
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*xipp++ = *sipp;
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for (sipp = set; sipp < set_end; sipp++)
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*xipp++ = *sipp;
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if (newsysinit)
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free(newsysinit, M_TEMP);
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newsysinit = newset;
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newsysinit_end = newset + count;
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}
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/*
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* System startup; initialize the world, create process 0, mount root
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* filesystem, and fork to create init and pagedaemon. Most of the
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* hard work is done in the lower-level initialization routines including
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* startup(), which does memory initialization and autoconfiguration.
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*
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* This allows simple addition of new kernel subsystems that require
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* boot time initialization. It also allows substitution of subsystem
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* (for instance, a scheduler, kernel profiler, or VM system) by object
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* module. Finally, it allows for optional "kernel threads".
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*/
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void
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mi_startup(void)
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{
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register struct sysinit **sipp; /* system initialization*/
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register struct sysinit **xipp; /* interior loop of sort*/
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register struct sysinit *save; /* bubble*/
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#if defined(VERBOSE_SYSINIT)
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int last;
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int verbose;
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#endif
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if (sysinit == NULL) {
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sysinit = SET_BEGIN(sysinit_set);
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sysinit_end = SET_LIMIT(sysinit_set);
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}
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restart:
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/*
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* Perform a bubble sort of the system initialization objects by
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* their subsystem (primary key) and order (secondary key).
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*/
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for (sipp = sysinit; sipp < sysinit_end; sipp++) {
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for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
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if ((*sipp)->subsystem < (*xipp)->subsystem ||
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((*sipp)->subsystem == (*xipp)->subsystem &&
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(*sipp)->order <= (*xipp)->order))
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continue; /* skip*/
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save = *sipp;
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*sipp = *xipp;
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*xipp = save;
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}
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}
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#if defined(VERBOSE_SYSINIT)
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last = SI_SUB_COPYRIGHT;
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verbose = 0;
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#if !defined(DDB)
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printf("VERBOSE_SYSINIT: DDB not enabled, symbol lookups disabled.\n");
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#endif
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#endif
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/*
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* Traverse the (now) ordered list of system initialization tasks.
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* Perform each task, and continue on to the next task.
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*
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* The last item on the list is expected to be the scheduler,
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* which will not return.
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*/
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for (sipp = sysinit; sipp < sysinit_end; sipp++) {
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if ((*sipp)->subsystem == SI_SUB_DUMMY)
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continue; /* skip dummy task(s)*/
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if ((*sipp)->subsystem == SI_SUB_DONE)
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continue;
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#if defined(VERBOSE_SYSINIT)
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if ((*sipp)->subsystem > last) {
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verbose = 1;
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last = (*sipp)->subsystem;
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printf("subsystem %x\n", last);
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}
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if (verbose) {
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#if defined(DDB)
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const char *name;
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c_db_sym_t sym;
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db_expr_t offset;
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sym = db_search_symbol((vm_offset_t)(*sipp)->func,
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DB_STGY_PROC, &offset);
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db_symbol_values(sym, &name, NULL);
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if (name != NULL)
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printf(" %s(%p)... ", name, (*sipp)->udata);
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else
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#endif
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printf(" %p(%p)... ", (*sipp)->func,
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(*sipp)->udata);
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}
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#endif
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/* Call function */
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(*((*sipp)->func))((*sipp)->udata);
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#if defined(VERBOSE_SYSINIT)
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if (verbose)
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printf("done.\n");
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#endif
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/* Check off the one we're just done */
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(*sipp)->subsystem = SI_SUB_DONE;
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/* Check if we've installed more sysinit items via KLD */
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if (newsysinit != NULL) {
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if (sysinit != SET_BEGIN(sysinit_set))
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free(sysinit, M_TEMP);
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sysinit = newsysinit;
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sysinit_end = newsysinit_end;
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newsysinit = NULL;
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newsysinit_end = NULL;
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goto restart;
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}
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}
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panic("Shouldn't get here!");
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/* NOTREACHED*/
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}
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/*
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***************************************************************************
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****
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**** The following SYSINIT's belong elsewhere, but have not yet
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**** been moved.
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****
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***************************************************************************
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*/
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static void
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print_caddr_t(void *data __unused)
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{
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printf("%s", (char *)data);
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}
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SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
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SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t, trademark)
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SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_caddr_t, version)
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#ifdef WITNESS
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static char wit_warn[] =
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"WARNING: WITNESS option enabled, expect reduced performance.\n";
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SYSINIT(witwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 1,
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print_caddr_t, wit_warn)
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SYSINIT(witwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 1,
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print_caddr_t, wit_warn)
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#endif
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#ifdef DIAGNOSTIC
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static char diag_warn[] =
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"WARNING: DIAGNOSTIC option enabled, expect reduced performance.\n";
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SYSINIT(diagwarn, SI_SUB_COPYRIGHT, SI_ORDER_THIRD + 2,
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print_caddr_t, diag_warn)
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SYSINIT(diagwarn2, SI_SUB_RUN_SCHEDULER, SI_ORDER_THIRD + 2,
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print_caddr_t, diag_warn)
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#endif
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static void
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set_boot_verbose(void *data __unused)
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{
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if (boothowto & RB_VERBOSE)
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bootverbose++;
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}
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SYSINIT(boot_verbose, SI_SUB_TUNABLES, SI_ORDER_ANY, set_boot_verbose, NULL)
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struct sysentvec null_sysvec = {
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0,
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NULL,
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0,
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0,
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NULL,
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0,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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"null",
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NULL,
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NULL,
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0,
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PAGE_SIZE,
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VM_MIN_ADDRESS,
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VM_MAXUSER_ADDRESS,
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USRSTACK,
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PS_STRINGS,
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VM_PROT_ALL,
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NULL,
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NULL,
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NULL
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};
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/*
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***************************************************************************
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****
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**** The two following SYSINIT's are proc0 specific glue code. I am not
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**** convinced that they can not be safely combined, but their order of
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**** operation has been maintained as the same as the original init_main.c
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**** for right now.
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****
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**** These probably belong in init_proc.c or kern_proc.c, since they
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**** deal with proc0 (the fork template process).
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****
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***************************************************************************
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*/
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/* ARGSUSED*/
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static void
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proc0_init(void *dummy __unused)
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{
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struct proc *p;
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unsigned i;
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struct thread *td;
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GIANT_REQUIRED;
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p = &proc0;
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td = &thread0;
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/*
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* Initialize magic number.
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*/
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p->p_magic = P_MAGIC;
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/*
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* Initialize thread and process structures.
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*/
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procinit(); /* set up proc zone */
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threadinit(); /* set up UMA zones */
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/*
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* Initialise scheduler resources.
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* Add scheduler specific parts to proc, thread as needed.
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*/
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schedinit(); /* scheduler gets its house in order */
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/*
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* Initialize sleep queue hash table
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*/
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sleepinit();
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/*
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* additional VM structures
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*/
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vm_init2();
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/*
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* Create process 0 (the swapper).
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*/
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LIST_INSERT_HEAD(&allproc, p, p_list);
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LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
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mtx_init(&pgrp0.pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
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p->p_pgrp = &pgrp0;
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LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
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LIST_INIT(&pgrp0.pg_members);
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LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
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pgrp0.pg_session = &session0;
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mtx_init(&session0.s_mtx, "session", NULL, MTX_DEF);
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session0.s_count = 1;
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session0.s_leader = p;
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p->p_sysent = &null_sysvec;
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p->p_flag = P_SYSTEM | P_INMEM;
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p->p_state = PRS_NORMAL;
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knlist_init(&p->p_klist, &p->p_mtx, NULL, NULL, NULL);
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STAILQ_INIT(&p->p_ktr);
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p->p_nice = NZERO;
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td->td_state = TDS_RUNNING;
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td->td_pri_class = PRI_TIMESHARE;
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td->td_user_pri = PUSER;
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td->td_base_user_pri = PUSER;
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td->td_priority = PVM;
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td->td_base_pri = PUSER;
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td->td_oncpu = 0;
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td->td_flags = TDF_INMEM;
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p->p_peers = 0;
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p->p_leader = p;
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|
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bcopy("swapper", p->p_comm, sizeof ("swapper"));
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callout_init(&p->p_itcallout, CALLOUT_MPSAFE);
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callout_init_mtx(&p->p_limco, &p->p_mtx, 0);
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callout_init(&td->td_slpcallout, CALLOUT_MPSAFE);
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/* Create credentials. */
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p->p_ucred = crget();
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p->p_ucred->cr_ngroups = 1; /* group 0 */
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p->p_ucred->cr_uidinfo = uifind(0);
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p->p_ucred->cr_ruidinfo = uifind(0);
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p->p_ucred->cr_prison = NULL; /* Don't jail it. */
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#ifdef AUDIT
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audit_cred_kproc0(p->p_ucred);
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#endif
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#ifdef MAC
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mac_create_proc0(p->p_ucred);
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|
#endif
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td->td_ucred = crhold(p->p_ucred);
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|
|
/* Create sigacts. */
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p->p_sigacts = sigacts_alloc();
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|
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/* Initialize signal state for process 0. */
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siginit(&proc0);
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|
/* Create the file descriptor table. */
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|
p->p_fd = fdinit(NULL);
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|
p->p_fdtol = NULL;
|
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|
|
/* Create the limits structures. */
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|
p->p_limit = lim_alloc();
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|
for (i = 0; i < RLIM_NLIMITS; i++)
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|
p->p_limit->pl_rlimit[i].rlim_cur =
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|
p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
|
|
p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur =
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|
p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
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|
p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur =
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p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
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i = ptoa(cnt.v_free_count);
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p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = i;
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p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
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p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
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p->p_cpulimit = RLIM_INFINITY;
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|
p->p_stats = pstats_alloc();
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/* Allocate a prototype map so we have something to fork. */
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pmap_pinit0(vmspace_pmap(&vmspace0));
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p->p_vmspace = &vmspace0;
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vmspace0.vm_refcnt = 1;
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vm_map_init(&vmspace0.vm_map, p->p_sysent->sv_minuser,
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p->p_sysent->sv_maxuser);
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vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
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/*
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* Charge root for one process.
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*/
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(void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
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|
}
|
|
SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
|
|
|
|
/* ARGSUSED*/
|
|
static void
|
|
proc0_post(void *dummy __unused)
|
|
{
|
|
struct timespec ts;
|
|
struct proc *p;
|
|
struct rusage ru;
|
|
|
|
/*
|
|
* Now we can look at the time, having had a chance to verify the
|
|
* time from the filesystem. Pretend that proc0 started now.
|
|
*/
|
|
sx_slock(&allproc_lock);
|
|
FOREACH_PROC_IN_SYSTEM(p) {
|
|
microuptime(&p->p_stats->p_start);
|
|
PROC_SLOCK(p);
|
|
rufetch(p, &ru); /* Clears thread stats */
|
|
PROC_SUNLOCK(p);
|
|
p->p_rux.rux_runtime = 0;
|
|
p->p_rux.rux_uticks = 0;
|
|
p->p_rux.rux_sticks = 0;
|
|
p->p_rux.rux_iticks = 0;
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
PCPU_SET(switchtime, cpu_ticks());
|
|
PCPU_SET(switchticks, ticks);
|
|
|
|
/*
|
|
* Give the ``random'' number generator a thump.
|
|
*/
|
|
nanotime(&ts);
|
|
srandom(ts.tv_sec ^ ts.tv_nsec);
|
|
}
|
|
SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
|
|
|
|
/*
|
|
***************************************************************************
|
|
****
|
|
**** The following SYSINIT's and glue code should be moved to the
|
|
**** respective files on a per subsystem basis.
|
|
****
|
|
***************************************************************************
|
|
*/
|
|
|
|
|
|
/*
|
|
***************************************************************************
|
|
****
|
|
**** The following code probably belongs in another file, like
|
|
**** kern/init_init.c.
|
|
****
|
|
***************************************************************************
|
|
*/
|
|
|
|
/*
|
|
* List of paths to try when searching for "init".
|
|
*/
|
|
static char init_path[MAXPATHLEN] =
|
|
#ifdef INIT_PATH
|
|
__XSTRING(INIT_PATH);
|
|
#else
|
|
"/sbin/init:/sbin/oinit:/sbin/init.bak:/rescue/init:/stand/sysinstall";
|
|
#endif
|
|
SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0,
|
|
"Path used to search the init process");
|
|
|
|
/*
|
|
* Shutdown timeout of init(8).
|
|
* Unused within kernel, but used to control init(8), hence do not remove.
|
|
*/
|
|
#ifndef INIT_SHUTDOWN_TIMEOUT
|
|
#define INIT_SHUTDOWN_TIMEOUT 120
|
|
#endif
|
|
static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT;
|
|
SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout,
|
|
CTLFLAG_RW, &init_shutdown_timeout, 0, "");
|
|
|
|
/*
|
|
* Start the initial user process; try exec'ing each pathname in init_path.
|
|
* The program is invoked with one argument containing the boot flags.
|
|
*/
|
|
static void
|
|
start_init(void *dummy)
|
|
{
|
|
vm_offset_t addr;
|
|
struct execve_args args;
|
|
int options, error;
|
|
char *var, *path, *next, *s;
|
|
char *ucp, **uap, *arg0, *arg1;
|
|
struct thread *td;
|
|
struct proc *p;
|
|
|
|
mtx_lock(&Giant);
|
|
|
|
GIANT_REQUIRED;
|
|
|
|
td = curthread;
|
|
p = td->td_proc;
|
|
|
|
vfs_mountroot();
|
|
|
|
/*
|
|
* Need just enough stack to hold the faked-up "execve()" arguments.
|
|
*/
|
|
addr = p->p_sysent->sv_usrstack - PAGE_SIZE;
|
|
if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
|
|
FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
|
|
panic("init: couldn't allocate argument space");
|
|
p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
|
|
p->p_vmspace->vm_ssize = 1;
|
|
|
|
if ((var = getenv("init_path")) != NULL) {
|
|
strlcpy(init_path, var, sizeof(init_path));
|
|
freeenv(var);
|
|
}
|
|
|
|
for (path = init_path; *path != '\0'; path = next) {
|
|
while (*path == ':')
|
|
path++;
|
|
if (*path == '\0')
|
|
break;
|
|
for (next = path; *next != '\0' && *next != ':'; next++)
|
|
/* nothing */ ;
|
|
if (bootverbose)
|
|
printf("start_init: trying %.*s\n", (int)(next - path),
|
|
path);
|
|
|
|
/*
|
|
* Move out the boot flag argument.
|
|
*/
|
|
options = 0;
|
|
ucp = (char *)p->p_sysent->sv_usrstack;
|
|
(void)subyte(--ucp, 0); /* trailing zero */
|
|
if (boothowto & RB_SINGLE) {
|
|
(void)subyte(--ucp, 's');
|
|
options = 1;
|
|
}
|
|
#ifdef notyet
|
|
if (boothowto & RB_FASTBOOT) {
|
|
(void)subyte(--ucp, 'f');
|
|
options = 1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BOOTCDROM
|
|
(void)subyte(--ucp, 'C');
|
|
options = 1;
|
|
#endif
|
|
|
|
if (options == 0)
|
|
(void)subyte(--ucp, '-');
|
|
(void)subyte(--ucp, '-'); /* leading hyphen */
|
|
arg1 = ucp;
|
|
|
|
/*
|
|
* Move out the file name (also arg 0).
|
|
*/
|
|
(void)subyte(--ucp, 0);
|
|
for (s = next - 1; s >= path; s--)
|
|
(void)subyte(--ucp, *s);
|
|
arg0 = ucp;
|
|
|
|
/*
|
|
* Move out the arg pointers.
|
|
*/
|
|
uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
|
|
(void)suword((caddr_t)--uap, (long)0); /* terminator */
|
|
(void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
|
|
(void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
|
|
|
|
/*
|
|
* Point at the arguments.
|
|
*/
|
|
args.fname = arg0;
|
|
args.argv = uap;
|
|
args.envv = NULL;
|
|
|
|
/*
|
|
* Now try to exec the program. If can't for any reason
|
|
* other than it doesn't exist, complain.
|
|
*
|
|
* Otherwise, return via fork_trampoline() all the way
|
|
* to user mode as init!
|
|
*/
|
|
if ((error = execve(td, &args)) == 0) {
|
|
mtx_unlock(&Giant);
|
|
return;
|
|
}
|
|
if (error != ENOENT)
|
|
printf("exec %.*s: error %d\n", (int)(next - path),
|
|
path, error);
|
|
}
|
|
printf("init: not found in path %s\n", init_path);
|
|
panic("no init");
|
|
}
|
|
|
|
/*
|
|
* Like kthread_create(), but runs in it's own address space.
|
|
* We do this early to reserve pid 1.
|
|
*
|
|
* Note special case - do not make it runnable yet. Other work
|
|
* in progress will change this more.
|
|
*/
|
|
static void
|
|
create_init(const void *udata __unused)
|
|
{
|
|
struct ucred *newcred, *oldcred;
|
|
int error;
|
|
|
|
error = fork1(&thread0, RFFDG | RFPROC | RFSTOPPED, 0, &initproc);
|
|
if (error)
|
|
panic("cannot fork init: %d\n", error);
|
|
KASSERT(initproc->p_pid == 1, ("create_init: initproc->p_pid != 1"));
|
|
/* divorce init's credentials from the kernel's */
|
|
newcred = crget();
|
|
PROC_LOCK(initproc);
|
|
initproc->p_flag |= P_SYSTEM | P_INMEM;
|
|
oldcred = initproc->p_ucred;
|
|
crcopy(newcred, oldcred);
|
|
#ifdef MAC
|
|
mac_create_proc1(newcred);
|
|
#endif
|
|
#ifdef AUDIT
|
|
audit_cred_proc1(newcred);
|
|
#endif
|
|
initproc->p_ucred = newcred;
|
|
PROC_UNLOCK(initproc);
|
|
crfree(oldcred);
|
|
cred_update_thread(FIRST_THREAD_IN_PROC(initproc));
|
|
cpu_set_fork_handler(FIRST_THREAD_IN_PROC(initproc), start_init, NULL);
|
|
}
|
|
SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
|
|
|
|
/*
|
|
* Make it runnable now.
|
|
*/
|
|
static void
|
|
kick_init(const void *udata __unused)
|
|
{
|
|
struct thread *td;
|
|
|
|
td = FIRST_THREAD_IN_PROC(initproc);
|
|
thread_lock(td);
|
|
TD_SET_CAN_RUN(td);
|
|
sched_add(td, SRQ_BORING);
|
|
thread_unlock(td);
|
|
}
|
|
SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
|