903 lines
24 KiB
C
903 lines
24 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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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_kdb.h"
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#include "opt_init_path.h"
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#include "opt_verbose_sysinit.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/epoch.h>
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#include <sys/eventhandler.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/imgact.h>
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#include <sys/jail.h>
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#include <sys/ktr.h>
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#include <sys/lock.h>
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#include <sys/loginclass.h>
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#include <sys/mount.h>
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#include <sys/mutex.h>
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#include <sys/dtrace_bsd.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/racct.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 <sys/cpuset.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/vm_extern.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 thread0_storage thread0_st __aligned(32);
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struct vmspace vmspace0;
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struct proc *initproc;
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int
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linux_alloc_current_noop(struct thread *td __unused, int flags __unused)
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{
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return (0);
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}
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int (*lkpi_alloc_current)(struct thread *, int) = linux_alloc_current_noop;
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#ifndef BOOTHOWTO
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#define BOOTHOWTO 0
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#endif
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int boothowto = BOOTHOWTO; /* 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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"Boot control flags, passed from loader");
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#ifndef BOOTVERBOSE
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#define BOOTVERBOSE 0
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#endif
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int bootverbose = BOOTVERBOSE;
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SYSCTL_INT(_debug, OID_AUTO, bootverbose, CTLFLAG_RW, &bootverbose, 0,
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"Control the output of verbose kernel messages");
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#ifdef VERBOSE_SYSINIT
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/*
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* We'll use the defined value of VERBOSE_SYSINIT from the kernel config to
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* dictate the default VERBOSE_SYSINIT behavior. Significant values for this
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* option and associated tunable are:
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* - 0, 'compiled in but silent by default'
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* - 1, 'compiled in but verbose by default' (default)
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*/
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int verbose_sysinit = VERBOSE_SYSINIT;
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TUNABLE_INT("debug.verbose_sysinit", &verbose_sysinit);
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#endif
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#ifdef INVARIANTS
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FEATURE(invariants, "Kernel compiled with INVARIANTS, may affect performance");
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#endif
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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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#if defined (DDB) && defined(VERBOSE_SYSINIT)
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static const char *
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symbol_name(vm_offset_t va, db_strategy_t strategy)
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{
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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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if (va == 0)
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return (NULL);
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sym = db_search_symbol(va, strategy, &offset);
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if (offset != 0)
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return (NULL);
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db_symbol_values(sym, &name, NULL);
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return (name);
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}
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#endif
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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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struct sysinit **sipp; /* system initialization*/
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struct sysinit **xipp; /* interior loop of sort*/
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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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TSENTER();
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if (boothowto & RB_VERBOSE)
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bootverbose++;
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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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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 && verbose_sysinit != 0) {
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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 *func, *data;
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func = symbol_name((vm_offset_t)(*sipp)->func,
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DB_STGY_PROC);
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data = symbol_name((vm_offset_t)(*sipp)->udata,
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DB_STGY_ANY);
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if (func != NULL && data != NULL)
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printf(" %s(&%s)... ", func, data);
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else if (func != NULL)
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printf(" %s(%p)... ", func, (*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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TSEXIT(); /* Here so we don't overlap with start_init. */
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mtx_assert(&Giant, MA_OWNED | MA_NOTRECURSED);
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mtx_unlock(&Giant);
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/*
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* Now hand over this thread to swapper.
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*/
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swapper();
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/* NOTREACHED*/
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}
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static void
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print_caddr_t(void *data)
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{
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printf("%s", (char *)data);
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}
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static void
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print_version(void *data __unused)
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{
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int len;
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/* Strip a trailing newline from version. */
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len = strlen(version);
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while (len > 0 && version[len - 1] == '\n')
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len--;
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printf("%.*s %s\n", len, version, machine);
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printf("%s\n", compiler_version);
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}
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SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t,
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copyright);
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SYSINIT(trademark, SI_SUB_COPYRIGHT, SI_ORDER_SECOND, print_caddr_t,
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trademark);
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SYSINIT(version, SI_SUB_COPYRIGHT, SI_ORDER_THIRD, print_version, NULL);
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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_FOURTH,
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print_caddr_t, wit_warn);
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SYSINIT(witwarn2, SI_SUB_LAST, SI_ORDER_FOURTH,
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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_FIFTH,
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print_caddr_t, diag_warn);
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SYSINIT(diagwarn2, SI_SUB_LAST, SI_ORDER_FIFTH,
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print_caddr_t, diag_warn);
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#endif
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static int
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null_fetch_syscall_args(struct thread *td __unused)
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{
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panic("null_fetch_syscall_args");
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}
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static void
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null_set_syscall_retval(struct thread *td __unused, int error __unused)
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{
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panic("null_set_syscall_retval");
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}
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static void
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null_set_fork_retval(struct thread *td __unused)
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{
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}
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struct sysentvec null_sysvec = {
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.sv_size = 0,
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.sv_table = NULL,
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.sv_transtrap = NULL,
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.sv_fixup = NULL,
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.sv_sendsig = NULL,
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.sv_sigcode = NULL,
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.sv_szsigcode = NULL,
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.sv_name = "null",
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.sv_coredump = NULL,
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.sv_imgact_try = NULL,
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.sv_minsigstksz = 0,
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.sv_minuser = VM_MIN_ADDRESS,
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.sv_maxuser = VM_MAXUSER_ADDRESS,
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.sv_usrstack = USRSTACK,
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.sv_psstrings = PS_STRINGS,
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.sv_stackprot = VM_PROT_ALL,
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.sv_copyout_strings = NULL,
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.sv_setregs = NULL,
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.sv_fixlimit = NULL,
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.sv_maxssiz = NULL,
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.sv_flags = 0,
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.sv_set_syscall_retval = null_set_syscall_retval,
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.sv_fetch_syscall_args = null_fetch_syscall_args,
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.sv_syscallnames = NULL,
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.sv_schedtail = NULL,
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.sv_thread_detach = NULL,
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.sv_trap = NULL,
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.sv_set_fork_retval = null_set_fork_retval,
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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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/* 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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struct thread *td;
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struct ucred *newcred;
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struct uidinfo tmpuinfo;
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struct loginclass tmplc = {
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.lc_name = "",
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};
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vm_paddr_t pageablemem;
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int i;
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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 and osrel.
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*/
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p->p_magic = P_MAGIC;
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p->p_osrel = osreldate;
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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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* 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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refcount_init(&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 | P_KPROC;
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p->p_flag2 = 0;
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p->p_state = PRS_NORMAL;
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p->p_klist = knlist_alloc(&p->p_mtx);
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STAILQ_INIT(&p->p_ktr);
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p->p_nice = NZERO;
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td->td_tid = THREAD0_TID;
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tidhash_add(td);
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|
TD_SET_STATE(td, TDS_RUNNING);
|
|
td->td_pri_class = PRI_TIMESHARE;
|
|
td->td_user_pri = PUSER;
|
|
td->td_base_user_pri = PUSER;
|
|
td->td_lend_user_pri = PRI_MAX;
|
|
td->td_priority = PVM;
|
|
td->td_base_pri = PVM;
|
|
td->td_oncpu = curcpu;
|
|
td->td_flags = TDF_INMEM;
|
|
td->td_pflags = TDP_KTHREAD;
|
|
td->td_cpuset = cpuset_thread0();
|
|
td->td_domain.dr_policy = td->td_cpuset->cs_domain;
|
|
prison0_init();
|
|
p->p_peers = 0;
|
|
p->p_leader = p;
|
|
p->p_reaper = p;
|
|
p->p_treeflag |= P_TREE_REAPER;
|
|
LIST_INIT(&p->p_reaplist);
|
|
|
|
strncpy(p->p_comm, "kernel", sizeof (p->p_comm));
|
|
strncpy(td->td_name, "swapper", sizeof (td->td_name));
|
|
|
|
callout_init_mtx(&p->p_itcallout, &p->p_mtx, 0);
|
|
callout_init_mtx(&p->p_limco, &p->p_mtx, 0);
|
|
callout_init(&td->td_slpcallout, 1);
|
|
TAILQ_INIT(&p->p_kqtim_stop);
|
|
|
|
/* Create credentials. */
|
|
newcred = crget();
|
|
newcred->cr_ngroups = 1; /* group 0 */
|
|
/* A hack to prevent uifind from tripping over NULL pointers. */
|
|
curthread->td_ucred = newcred;
|
|
tmpuinfo.ui_uid = 1;
|
|
newcred->cr_uidinfo = newcred->cr_ruidinfo = &tmpuinfo;
|
|
newcred->cr_uidinfo = uifind(0);
|
|
newcred->cr_ruidinfo = uifind(0);
|
|
newcred->cr_loginclass = &tmplc;
|
|
newcred->cr_loginclass = loginclass_find("default");
|
|
/* End hack. creds get properly set later with thread_cow_get_proc */
|
|
curthread->td_ucred = NULL;
|
|
newcred->cr_prison = &prison0;
|
|
newcred->cr_users++; /* avoid assertion failure */
|
|
proc_set_cred_init(p, newcred);
|
|
newcred->cr_users--;
|
|
crfree(newcred);
|
|
#ifdef AUDIT
|
|
audit_cred_kproc0(newcred);
|
|
#endif
|
|
#ifdef MAC
|
|
mac_cred_create_swapper(newcred);
|
|
#endif
|
|
/* Create sigacts. */
|
|
p->p_sigacts = sigacts_alloc();
|
|
|
|
/* Initialize signal state for process 0. */
|
|
siginit(&proc0);
|
|
|
|
/* Create the file descriptor table. */
|
|
p->p_pd = pdinit(NULL, false);
|
|
p->p_fd = fdinit(NULL, false, NULL);
|
|
p->p_fdtol = NULL;
|
|
|
|
/* Create the limits structures. */
|
|
p->p_limit = lim_alloc();
|
|
for (i = 0; i < RLIM_NLIMITS; i++)
|
|
p->p_limit->pl_rlimit[i].rlim_cur =
|
|
p->p_limit->pl_rlimit[i].rlim_max = RLIM_INFINITY;
|
|
p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_cur =
|
|
p->p_limit->pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
|
|
p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_cur =
|
|
p->p_limit->pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
|
|
p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_cur = dfldsiz;
|
|
p->p_limit->pl_rlimit[RLIMIT_DATA].rlim_max = maxdsiz;
|
|
p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_cur = dflssiz;
|
|
p->p_limit->pl_rlimit[RLIMIT_STACK].rlim_max = maxssiz;
|
|
/* Cast to avoid overflow on i386/PAE. */
|
|
pageablemem = ptoa((vm_paddr_t)vm_free_count());
|
|
p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_cur =
|
|
p->p_limit->pl_rlimit[RLIMIT_RSS].rlim_max = pageablemem;
|
|
p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = pageablemem / 3;
|
|
p->p_limit->pl_rlimit[RLIMIT_MEMLOCK].rlim_max = pageablemem;
|
|
p->p_cpulimit = RLIM_INFINITY;
|
|
|
|
PROC_LOCK(p);
|
|
thread_cow_get_proc(td, p);
|
|
PROC_UNLOCK(p);
|
|
|
|
/* Initialize resource accounting structures. */
|
|
racct_create(&p->p_racct);
|
|
|
|
p->p_stats = pstats_alloc();
|
|
|
|
/* Allocate a prototype map so we have something to fork. */
|
|
p->p_vmspace = &vmspace0;
|
|
refcount_init(&vmspace0.vm_refcnt, 1);
|
|
pmap_pinit0(vmspace_pmap(&vmspace0));
|
|
|
|
/*
|
|
* proc0 is not expected to enter usermode, so there is no special
|
|
* handling for sv_minuser here, like is done for exec_new_vmspace().
|
|
*/
|
|
vm_map_init(&vmspace0.vm_map, vmspace_pmap(&vmspace0),
|
|
p->p_sysent->sv_minuser, p->p_sysent->sv_maxuser);
|
|
|
|
/*
|
|
* Call the init and ctor for the new thread and proc. We wait
|
|
* to do this until all other structures are fairly sane.
|
|
*/
|
|
EVENTHANDLER_DIRECT_INVOKE(process_init, p);
|
|
EVENTHANDLER_DIRECT_INVOKE(thread_init, td);
|
|
#ifdef KDTRACE_HOOKS
|
|
kdtrace_proc_ctor(p);
|
|
kdtrace_thread_ctor(td);
|
|
#endif
|
|
EVENTHANDLER_DIRECT_INVOKE(process_ctor, p);
|
|
EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td);
|
|
|
|
/*
|
|
* Charge root for one process.
|
|
*/
|
|
(void)chgproccnt(p->p_ucred->cr_ruidinfo, 1, 0);
|
|
PROC_LOCK(p);
|
|
racct_add_force(p, RACCT_NPROC, 1);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL);
|
|
|
|
/* ARGSUSED*/
|
|
static void
|
|
proc0_post(void *dummy __unused)
|
|
{
|
|
struct proc *p;
|
|
struct rusage ru;
|
|
struct thread *td;
|
|
|
|
/*
|
|
* 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) {
|
|
PROC_LOCK(p);
|
|
if (p->p_state == PRS_NEW) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
microuptime(&p->p_stats->p_start);
|
|
PROC_STATLOCK(p);
|
|
rufetch(p, &ru); /* Clears thread stats */
|
|
p->p_rux.rux_runtime = 0;
|
|
p->p_rux.rux_uticks = 0;
|
|
p->p_rux.rux_sticks = 0;
|
|
p->p_rux.rux_iticks = 0;
|
|
PROC_STATUNLOCK(p);
|
|
FOREACH_THREAD_IN_PROC(p, td) {
|
|
td->td_runtime = 0;
|
|
}
|
|
PROC_UNLOCK(p);
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
PCPU_SET(switchtime, cpu_ticks());
|
|
PCPU_SET(switchticks, ticks);
|
|
}
|
|
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.
|
|
****
|
|
***************************************************************************
|
|
*/
|
|
|
|
/*
|
|
* 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";
|
|
#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, "Shutdown timeout of init(8). "
|
|
"Unused within kernel, but used to control init(8)");
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct image_args args;
|
|
int error;
|
|
char *var, *path;
|
|
char *free_init_path, *tmp_init_path;
|
|
struct thread *td;
|
|
struct proc *p;
|
|
struct vmspace *oldvmspace;
|
|
|
|
TSENTER(); /* Here so we don't overlap with mi_startup. */
|
|
|
|
td = curthread;
|
|
p = td->td_proc;
|
|
|
|
vfs_mountroot();
|
|
|
|
/* Wipe GELI passphrase from the environment. */
|
|
kern_unsetenv("kern.geom.eli.passphrase");
|
|
|
|
/* For Multicons, report which console is primary to both */
|
|
if (boothowto & RB_MULTIPLE) {
|
|
if (boothowto & RB_SERIAL)
|
|
printf("Dual Console: Serial Primary, Video Secondary\n");
|
|
else
|
|
printf("Dual Console: Video Primary, Serial Secondary\n");
|
|
}
|
|
|
|
if ((var = kern_getenv("init_path")) != NULL) {
|
|
strlcpy(init_path, var, sizeof(init_path));
|
|
freeenv(var);
|
|
}
|
|
free_init_path = tmp_init_path = strdup(init_path, M_TEMP);
|
|
|
|
while ((path = strsep(&tmp_init_path, ":")) != NULL) {
|
|
if (bootverbose)
|
|
printf("start_init: trying %s\n", path);
|
|
|
|
memset(&args, 0, sizeof(args));
|
|
error = exec_alloc_args(&args);
|
|
if (error != 0)
|
|
panic("%s: Can't allocate space for init arguments %d",
|
|
__func__, error);
|
|
|
|
error = exec_args_add_fname(&args, path, UIO_SYSSPACE);
|
|
if (error != 0)
|
|
panic("%s: Can't add fname %d", __func__, error);
|
|
error = exec_args_add_arg(&args, path, UIO_SYSSPACE);
|
|
if (error != 0)
|
|
panic("%s: Can't add argv[0] %d", __func__, error);
|
|
if (boothowto & RB_SINGLE)
|
|
error = exec_args_add_arg(&args, "-s", UIO_SYSSPACE);
|
|
if (error != 0)
|
|
panic("%s: Can't add argv[0] %d", __func__, error);
|
|
|
|
/*
|
|
* 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!
|
|
*/
|
|
KASSERT((td->td_pflags & TDP_EXECVMSPC) == 0,
|
|
("nested execve"));
|
|
oldvmspace = p->p_vmspace;
|
|
error = kern_execve(td, &args, NULL, oldvmspace);
|
|
KASSERT(error != 0,
|
|
("kern_execve returned success, not EJUSTRETURN"));
|
|
if (error == EJUSTRETURN) {
|
|
exec_cleanup(td, oldvmspace);
|
|
free(free_init_path, M_TEMP);
|
|
TSEXIT();
|
|
return;
|
|
}
|
|
if (error != ENOENT)
|
|
printf("exec %s: error %d\n", path, error);
|
|
}
|
|
free(free_init_path, M_TEMP);
|
|
printf("init: not found in path %s\n", init_path);
|
|
panic("no init");
|
|
}
|
|
|
|
/*
|
|
* Like kproc_create(), but runs in its own address space. We do this
|
|
* early to reserve pid 1. Note special case - do not make it
|
|
* runnable yet, init execution is started when userspace can be served.
|
|
*/
|
|
static void
|
|
create_init(const void *udata __unused)
|
|
{
|
|
struct fork_req fr;
|
|
struct ucred *newcred, *oldcred;
|
|
struct thread *td;
|
|
int error;
|
|
|
|
bzero(&fr, sizeof(fr));
|
|
fr.fr_flags = RFFDG | RFPROC | RFSTOPPED;
|
|
fr.fr_procp = &initproc;
|
|
error = fork1(&thread0, &fr);
|
|
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();
|
|
sx_xlock(&proctree_lock);
|
|
PROC_LOCK(initproc);
|
|
initproc->p_flag |= P_SYSTEM | P_INMEM;
|
|
initproc->p_treeflag |= P_TREE_REAPER;
|
|
oldcred = initproc->p_ucred;
|
|
crcopy(newcred, oldcred);
|
|
#ifdef MAC
|
|
mac_cred_create_init(newcred);
|
|
#endif
|
|
#ifdef AUDIT
|
|
audit_cred_proc1(newcred);
|
|
#endif
|
|
proc_set_cred(initproc, newcred);
|
|
td = FIRST_THREAD_IN_PROC(initproc);
|
|
crcowfree(td);
|
|
td->td_realucred = crcowget(initproc->p_ucred);
|
|
td->td_ucred = td->td_realucred;
|
|
PROC_UNLOCK(initproc);
|
|
sx_xunlock(&proctree_lock);
|
|
crfree(oldcred);
|
|
cpu_fork_kthread_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);
|
|
}
|
|
SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_MIDDLE, kick_init, NULL);
|
|
|
|
/*
|
|
* DDB(4).
|
|
*/
|
|
#ifdef DDB
|
|
static void
|
|
db_show_print_syinit(struct sysinit *sip, bool ddb)
|
|
{
|
|
const char *sname, *funcname;
|
|
c_db_sym_t sym;
|
|
db_expr_t offset;
|
|
|
|
#define xprint(...) \
|
|
if (ddb) \
|
|
db_printf(__VA_ARGS__); \
|
|
else \
|
|
printf(__VA_ARGS__)
|
|
|
|
if (sip == NULL) {
|
|
xprint("%s: no sysinit * given\n", __func__);
|
|
return;
|
|
}
|
|
|
|
sym = db_search_symbol((vm_offset_t)sip, DB_STGY_ANY, &offset);
|
|
db_symbol_values(sym, &sname, NULL);
|
|
sym = db_search_symbol((vm_offset_t)sip->func, DB_STGY_PROC, &offset);
|
|
db_symbol_values(sym, &funcname, NULL);
|
|
xprint("%s(%p)\n", (sname != NULL) ? sname : "", sip);
|
|
xprint(" %#08x %#08x\n", sip->subsystem, sip->order);
|
|
xprint(" %p(%s)(%p)\n",
|
|
sip->func, (funcname != NULL) ? funcname : "", sip->udata);
|
|
#undef xprint
|
|
}
|
|
|
|
DB_SHOW_COMMAND(sysinit, db_show_sysinit)
|
|
{
|
|
struct sysinit **sipp;
|
|
|
|
db_printf("SYSINIT vs Name(Ptr)\n");
|
|
db_printf(" Subsystem Order\n");
|
|
db_printf(" Function(Name)(Arg)\n");
|
|
for (sipp = sysinit; sipp < sysinit_end; sipp++) {
|
|
db_show_print_syinit(*sipp, true);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
#endif /* DDB */
|