620 lines
15 KiB
C
620 lines
15 KiB
C
/* $NetBSD: init_main.c,v 1.139 1999/01/16 21:06:44 chuck Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1995 Christopher G. Demetriou. All rights reserved.
|
|
* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
* (c) UNIX System Laboratories, Inc.
|
|
* All or some portions of this file are derived from material licensed
|
|
* to the University of California by American Telephone and Telegraph
|
|
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
|
|
* the permission of UNIX System Laboratories, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)init_main.c 8.16 (Berkeley) 5/14/95
|
|
*/
|
|
|
|
#include "fs_nfs.h"
|
|
#include "opt_nfsserver.h"
|
|
#include "opt_uvm.h"
|
|
#include "opt_sysv.h"
|
|
|
|
#include "rnd.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/file.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/map.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/kthread.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/tty.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/buf.h>
|
|
#ifdef REAL_CLISTS
|
|
#include <sys/clist.h>
|
|
#endif
|
|
#include <sys/device.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/reboot.h>
|
|
#include <sys/user.h>
|
|
#ifdef SYSVSHM
|
|
#include <sys/shm.h>
|
|
#endif
|
|
#ifdef SYSVSEM
|
|
#include <sys/sem.h>
|
|
#endif
|
|
#ifdef SYSVMSG
|
|
#include <sys/msg.h>
|
|
#endif
|
|
#include <sys/domain.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/namei.h>
|
|
#if NRND > 0
|
|
#include <sys/rnd.h>
|
|
#endif
|
|
|
|
#include <sys/syscall.h>
|
|
#include <sys/syscallargs.h>
|
|
|
|
#include <ufs/ufs/quota.h>
|
|
|
|
#include <machine/cpu.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/vm_pageout.h>
|
|
|
|
#if defined(UVM)
|
|
#include <uvm/uvm.h>
|
|
#endif
|
|
|
|
#include <net/if.h>
|
|
#include <net/raw_cb.h>
|
|
|
|
char copyright[] = "\
|
|
Copyright (c) 1996, 1997, 1998, 1999
|
|
The NetBSD Foundation, Inc. All rights reserved.
|
|
Copyright (c) 1982, 1986, 1989, 1991, 1993
|
|
The Regents of the University of California. All rights reserved.
|
|
|
|
";
|
|
|
|
/* Components of the first process -- never freed. */
|
|
struct session session0;
|
|
struct pgrp pgrp0;
|
|
struct proc proc0;
|
|
struct pcred cred0;
|
|
struct filedesc0 filedesc0;
|
|
struct plimit limit0;
|
|
struct vmspace vmspace0;
|
|
#ifndef curproc
|
|
struct proc *curproc = &proc0;
|
|
#endif
|
|
struct proc *initproc;
|
|
|
|
int cmask = CMASK;
|
|
extern struct user *proc0paddr;
|
|
|
|
struct vnode *rootvp, *swapdev_vp;
|
|
int boothowto;
|
|
struct timeval boottime;
|
|
struct timeval runtime;
|
|
|
|
static void check_console __P((struct proc *p));
|
|
static void start_init __P((void *));
|
|
static void start_pagedaemon __P((void *));
|
|
static void start_reaper __P((void *));
|
|
void main __P((void));
|
|
|
|
extern char sigcode[], esigcode[];
|
|
#ifdef SYSCALL_DEBUG
|
|
extern char *syscallnames[];
|
|
#endif
|
|
|
|
struct emul emul_netbsd = {
|
|
"netbsd",
|
|
NULL,
|
|
sendsig,
|
|
SYS_syscall,
|
|
SYS_MAXSYSCALL,
|
|
sysent,
|
|
#ifdef SYSCALL_DEBUG
|
|
syscallnames,
|
|
#else
|
|
NULL,
|
|
#endif
|
|
0,
|
|
copyargs,
|
|
setregs,
|
|
sigcode,
|
|
esigcode,
|
|
};
|
|
|
|
/*
|
|
* System startup; initialize the world, create process 0, mount root
|
|
* filesystem, and fork to create init and pagedaemon. Most of the
|
|
* hard work is done in the lower-level initialization routines including
|
|
* startup(), which does memory initialization and autoconfiguration.
|
|
*/
|
|
void
|
|
main()
|
|
{
|
|
struct proc *p, *p2;
|
|
struct pdevinit *pdev;
|
|
int i, s, error;
|
|
extern struct pdevinit pdevinit[];
|
|
extern void roundrobin __P((void *));
|
|
extern void schedcpu __P((void *));
|
|
extern void disk_init __P((void));
|
|
#if defined(NFSSERVER) || defined(NFS)
|
|
extern void nfs_init __P((void));
|
|
#endif
|
|
|
|
/*
|
|
* Initialize the current process pointer (curproc) before
|
|
* any possible traps/probes to simplify trap processing.
|
|
*/
|
|
p = &proc0;
|
|
curproc = p;
|
|
/*
|
|
* Attempt to find console and initialize
|
|
* in case of early panic or other messages.
|
|
*/
|
|
consinit();
|
|
printf(copyright);
|
|
|
|
#if defined(UVM)
|
|
uvm_init();
|
|
#else
|
|
vm_mem_init();
|
|
kmeminit();
|
|
vm_page_physrehash();
|
|
#endif /* UVM */
|
|
|
|
/*
|
|
* Initialize mbuf's. Do this now because we might attempt to
|
|
* allocate mbufs or mbuf clusters during autoconfiguration.
|
|
*/
|
|
mbinit();
|
|
|
|
/* Initialize sockets. */
|
|
soinit();
|
|
|
|
disk_init(); /* must come before autoconfiguration */
|
|
tty_init(); /* initialise tty list */
|
|
#if NRND > 0
|
|
rnd_init();
|
|
#endif
|
|
config_init(); /* init autoconfiguration data structures */
|
|
cpu_startup();
|
|
|
|
/*
|
|
* Initialize process and pgrp structures.
|
|
*/
|
|
procinit();
|
|
|
|
/*
|
|
* Create process 0 (the swapper).
|
|
*/
|
|
LIST_INSERT_HEAD(&allproc, p, p_list);
|
|
p->p_pgrp = &pgrp0;
|
|
LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
|
|
LIST_INIT(&pgrp0.pg_members);
|
|
LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
|
|
|
|
pgrp0.pg_session = &session0;
|
|
session0.s_count = 1;
|
|
session0.s_sid = p->p_pid;
|
|
session0.s_leader = p;
|
|
|
|
/*
|
|
* Set P_NOCLDWAIT so that kernel threads are reparented to
|
|
* init(8) when they exit. init(8) can easily wait them out
|
|
* for us.
|
|
*/
|
|
p->p_flag = P_INMEM | P_SYSTEM | P_NOCLDWAIT;
|
|
p->p_stat = SRUN;
|
|
p->p_nice = NZERO;
|
|
p->p_emul = &emul_netbsd;
|
|
memcpy(p->p_comm, "swapper", sizeof("swapper"));
|
|
|
|
/* Create credentials. */
|
|
cred0.p_refcnt = 1;
|
|
p->p_cred = &cred0;
|
|
p->p_ucred = crget();
|
|
p->p_ucred->cr_ngroups = 1; /* group 0 */
|
|
|
|
/* Create the file descriptor table. */
|
|
finit();
|
|
p->p_fd = &filedesc0.fd_fd;
|
|
fdinit1(&filedesc0);
|
|
|
|
/* Create the limits structures. */
|
|
p->p_limit = &limit0;
|
|
for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
|
|
limit0.pl_rlimit[i].rlim_cur =
|
|
limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
|
|
limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE;
|
|
limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC;
|
|
#if defined(UVM)
|
|
i = ptoa(uvmexp.free);
|
|
#else
|
|
i = ptoa(cnt.v_free_count);
|
|
#endif
|
|
limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
|
|
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
|
|
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
|
|
limit0.p_refcnt = 1;
|
|
|
|
/*
|
|
* Initialize proc0's vmspace, which uses the kernel pmap.
|
|
* All kernel processes (which never have user space mappings)
|
|
* share proc0's vmspace, and thus, the kernel pmap.
|
|
*/
|
|
#if defined(UVM)
|
|
uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS),
|
|
trunc_page(VM_MAX_ADDRESS), TRUE);
|
|
#else
|
|
vmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS),
|
|
trunc_page(VM_MAX_ADDRESS), TRUE);
|
|
#endif
|
|
p->p_vmspace = &vmspace0;
|
|
|
|
p->p_addr = proc0paddr; /* XXX */
|
|
|
|
/*
|
|
* We continue to place resource usage info and signal
|
|
* actions in the user struct so they're pageable.
|
|
*/
|
|
p->p_stats = &p->p_addr->u_stats;
|
|
p->p_sigacts = &p->p_addr->u_sigacts;
|
|
|
|
/*
|
|
* Charge root for one process.
|
|
*/
|
|
(void)chgproccnt(0, 1);
|
|
|
|
rqinit();
|
|
|
|
/* Configure virtual memory system, set vm rlimits. */
|
|
#if defined(UVM)
|
|
uvm_init_limits(p);
|
|
#else
|
|
vm_init_limits(p);
|
|
#endif
|
|
|
|
/* Initialize the file systems. */
|
|
#if defined(NFSSERVER) || defined(NFS)
|
|
nfs_init(); /* initialize server/shared data */
|
|
#endif
|
|
vfsinit();
|
|
|
|
/* Start real time and statistics clocks. */
|
|
initclocks();
|
|
|
|
#ifdef REAL_CLISTS
|
|
/* Initialize clists. */
|
|
clist_init();
|
|
#endif
|
|
|
|
#ifdef SYSVSHM
|
|
/* Initialize System V style shared memory. */
|
|
shminit();
|
|
#endif
|
|
|
|
#ifdef SYSVSEM
|
|
/* Initialize System V style semaphores. */
|
|
seminit();
|
|
#endif
|
|
|
|
#ifdef SYSVMSG
|
|
/* Initialize System V style message queues. */
|
|
msginit();
|
|
#endif
|
|
|
|
/* Attach pseudo-devices. */
|
|
for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++)
|
|
(*pdev->pdev_attach)(pdev->pdev_count);
|
|
|
|
/*
|
|
* Initialize protocols. Block reception of incoming packets
|
|
* until everything is ready.
|
|
*/
|
|
s = splimp();
|
|
ifinit();
|
|
domaininit();
|
|
splx(s);
|
|
|
|
#ifdef GPROF
|
|
/* Initialize kernel profiling. */
|
|
kmstartup();
|
|
#endif
|
|
|
|
/* Kick off timeout driven events by calling first time. */
|
|
roundrobin(NULL);
|
|
schedcpu(NULL);
|
|
|
|
/* Determine the root and dump devices. */
|
|
cpu_rootconf();
|
|
cpu_dumpconf();
|
|
|
|
/* Mount the root file system. */
|
|
do {
|
|
domountroothook();
|
|
if ((error = vfs_mountroot())) {
|
|
printf("cannot mount root, error = %d\n", error);
|
|
boothowto |= RB_ASKNAME;
|
|
setroot(root_device,
|
|
(rootdev != NODEV) ? DISKPART(rootdev) : 0, NULL);
|
|
}
|
|
} while (error != 0);
|
|
mountroothook_destroy();
|
|
|
|
mountlist.cqh_first->mnt_flag |= MNT_ROOTFS;
|
|
mountlist.cqh_first->mnt_op->vfs_refcount++;
|
|
|
|
/*
|
|
* Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to
|
|
* reference it.
|
|
*/
|
|
if (VFS_ROOT(mountlist.cqh_first, &rootvnode))
|
|
panic("cannot find root vnode");
|
|
filedesc0.fd_fd.fd_cdir = rootvnode;
|
|
VREF(filedesc0.fd_fd.fd_cdir);
|
|
VOP_UNLOCK(rootvnode, 0);
|
|
filedesc0.fd_fd.fd_rdir = NULL;
|
|
#if defined(UVM)
|
|
uvm_swap_init();
|
|
#else
|
|
swapinit();
|
|
#endif
|
|
|
|
/*
|
|
* Now can look at time, having had a chance to verify the time
|
|
* from the file system. Reset p->p_rtime as it may have been
|
|
* munched in mi_switch() after the time got set.
|
|
*/
|
|
p->p_stats->p_start = runtime = mono_time = boottime = time;
|
|
p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0;
|
|
|
|
/* Initialize signal state for process 0. */
|
|
siginit(p);
|
|
|
|
/* Create process 1 (init(8)). */
|
|
if (fork1(p, 0, NULL, &p2))
|
|
panic("fork init");
|
|
cpu_set_kpc(p2, start_init, p2);
|
|
|
|
/* Create process 2, the pageout daemon kernel thread. */
|
|
if (kthread_create(start_pagedaemon, NULL, NULL, "pagedaemon"))
|
|
panic("fork pagedaemon");
|
|
|
|
/* Create process 3, the process reaper kernel thread. */
|
|
if (kthread_create(start_reaper, NULL, NULL, "reaper"))
|
|
panic("fork reaper");
|
|
|
|
/* Create any other deferred kernel threads. */
|
|
kthread_run_deferred_queue();
|
|
|
|
/* The scheduler is an infinite loop. */
|
|
#if defined(UVM)
|
|
uvm_scheduler();
|
|
#else
|
|
scheduler();
|
|
#endif
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
static void
|
|
check_console(p)
|
|
struct proc *p;
|
|
{
|
|
struct nameidata nd;
|
|
int error;
|
|
|
|
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p);
|
|
error = namei(&nd);
|
|
if (error == 0)
|
|
vrele(nd.ni_vp);
|
|
else if (error == ENOENT)
|
|
printf("warning: no /dev/console\n");
|
|
else
|
|
printf("warning: lookup /dev/console: error %d\n", error);
|
|
}
|
|
|
|
/*
|
|
* List of paths to try when searching for "init".
|
|
*/
|
|
static char *initpaths[] = {
|
|
"/sbin/init",
|
|
"/sbin/oinit",
|
|
"/sbin/init.bak",
|
|
NULL,
|
|
};
|
|
|
|
/*
|
|
* Start the initial user process; try exec'ing each pathname in "initpaths".
|
|
* The program is invoked with one argument containing the boot flags.
|
|
*/
|
|
static void
|
|
start_init(arg)
|
|
void *arg;
|
|
{
|
|
struct proc *p = arg;
|
|
vaddr_t addr;
|
|
struct sys_execve_args /* {
|
|
syscallarg(const char *) path;
|
|
syscallarg(char * const *) argp;
|
|
syscallarg(char * const *) envp;
|
|
} */ args;
|
|
int options, i, error;
|
|
register_t retval[2];
|
|
char flags[4], *flagsp;
|
|
char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL;
|
|
|
|
/*
|
|
* Now in process 1.
|
|
*/
|
|
initproc = p;
|
|
|
|
/*
|
|
* This is not the right way to do this. We really should
|
|
* hand-craft a descriptor onto /dev/console to hand to init,
|
|
* but that's a _lot_ more work, and the benefit from this easy
|
|
* hack makes up for the "good is the enemy of the best" effect.
|
|
*/
|
|
check_console(p);
|
|
|
|
/*
|
|
* Need just enough stack to hold the faked-up "execve()" arguments.
|
|
*/
|
|
addr = USRSTACK - PAGE_SIZE;
|
|
#if defined(UVM)
|
|
if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE,
|
|
NULL, UVM_UNKNOWN_OFFSET,
|
|
UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY,
|
|
UVM_ADV_NORMAL,
|
|
UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))
|
|
!= KERN_SUCCESS)
|
|
panic("init: couldn't allocate argument space");
|
|
#else
|
|
if (vm_allocate(&p->p_vmspace->vm_map, &addr, (vsize_t)PAGE_SIZE,
|
|
FALSE) != 0)
|
|
panic("init: couldn't allocate argument space");
|
|
#endif
|
|
p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
|
|
|
|
for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) {
|
|
ucp = (char *)(addr + PAGE_SIZE);
|
|
|
|
/*
|
|
* Construct the boot flag argument.
|
|
*/
|
|
flagsp = flags;
|
|
*flagsp++ = '-';
|
|
options = 0;
|
|
|
|
if (boothowto & RB_SINGLE) {
|
|
*flagsp++ = 's';
|
|
options = 1;
|
|
}
|
|
#ifdef notyet
|
|
if (boothowto & RB_FASTBOOT) {
|
|
*flagsp++ = 'f';
|
|
options = 1;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Move out the flags (arg 1), if necessary.
|
|
*/
|
|
if (options != 0) {
|
|
*flagsp++ = '\0';
|
|
i = flagsp - flags;
|
|
#ifdef DEBUG
|
|
printf("init: copying out flags `%s' %d\n", flags, i);
|
|
#endif
|
|
(void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i);
|
|
arg1 = ucp;
|
|
}
|
|
|
|
/*
|
|
* Move out the file name (also arg 0).
|
|
*/
|
|
i = strlen(path) + 1;
|
|
#ifdef DEBUG
|
|
printf("init: copying out path `%s' %d\n", path, i);
|
|
#endif
|
|
(void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i);
|
|
arg0 = ucp;
|
|
|
|
/*
|
|
* Move out the arg pointers.
|
|
*/
|
|
uap = (char **)((long)ucp & ~ALIGNBYTES);
|
|
(void)suword((caddr_t)--uap, 0); /* terminator */
|
|
if (options != 0)
|
|
(void)suword((caddr_t)--uap, (long)arg1);
|
|
(void)suword((caddr_t)--uap, (long)arg0);
|
|
|
|
/*
|
|
* Point at the arguments.
|
|
*/
|
|
SCARG(&args, path) = arg0;
|
|
SCARG(&args, argp) = uap;
|
|
SCARG(&args, envp) = NULL;
|
|
|
|
/*
|
|
* Now try to exec the program. If can't for any reason
|
|
* other than it doesn't exist, complain.
|
|
*/
|
|
error = sys_execve(p, &args, retval);
|
|
if (error == 0 || error == EJUSTRETURN)
|
|
return;
|
|
if (error != ENOENT)
|
|
printf("exec %s: error %d\n", path, error);
|
|
}
|
|
printf("init: not found\n");
|
|
panic("no init");
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
start_pagedaemon(arg)
|
|
void *arg;
|
|
{
|
|
|
|
#if defined(UVM)
|
|
uvm_pageout();
|
|
#else
|
|
vm_pageout();
|
|
#endif
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
start_reaper(arg)
|
|
void *arg;
|
|
{
|
|
|
|
reaper();
|
|
/* NOTREACHED */
|
|
}
|