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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1995 Artisoft, Inc. All Rights Reserved.
*
* 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.
*
* @(#)vfs_conf.c 8.8 (Berkeley) 3/31/94
* $FreeBSD$
*/
/*
* PURPOSE: This file abstracts the root mounting interface from
* the per file system semantics for handling mounts,
* the overall intent of which is to move the BSD
* internals dependence out of the FS code, both to
* make the FS code more portable and to free up some
* of the BSD internals so that they may more easily
* be changed.
*
* NOTE1: Code is single entry/single exit to aid debugging
* and conversion for kernel multithreading.
*
* NOTE2: Code notes lock state in headers on entry and exit
* as an aid to conversion for kernel multithreading
* on SMP reentrancy
*/
#include <sys/param.h> /* dev_t (types.h)*/
#include <sys/systm.h> /* rootvp*/
#include <sys/proc.h> /* curproc*/
#include <sys/vnode.h> /* NULLVP*/
#include <sys/mount.h> /* struct mount*/
#include <sys/malloc.h> /* M_MOUNT*/
/*
* GLOBALS
*/
int (*mountroot) __P((void *));
struct vnode *rootvnode;
struct vfsops *mountrootvfsops;
/*
* Common root mount code shared by all filesystems
*/
#define ROOTDIR "/"
#define ROOTNAME "root_device"
/*
* vfs_mountroot
*
* Common entry point for root mounts
*
* PARAMETERS:
* data pointer to the vfs_ops for the FS type mounting
*
* RETURNS: 0 Success
* !0 error number (errno.h)
*
* LOCK STATE:
* ENTRY
* <no locks held>
* EXIT
* <no locks held>
*
* NOTES:
* This code is currently supported only for use for
* the FFS file system type. This is a matter of
* fixing the other file systems, not this code!
*/
int
vfs_mountroot(data)
void *data;
{
struct mount *mp;
u_int size;
int err = 0;
struct proc *p = curproc; /* XXX */
struct vfsops *mnt_op = (struct vfsops *)data;
/*
* New root mount structure
*/
mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
mp->mnt_op = mnt_op;
mp->mnt_flag = MNT_ROOTFS;
mp->mnt_vnodecovered = NULLVP;
/*
* Lock mount point
*/
if( ( err = vfs_lock(mp)) != 0)
goto error_1;
/* Save "last mounted on" info for mount point (NULL pad)*/
copystr( ROOTDIR, /* mount point*/
mp->mnt_stat.f_mntonname, /* save area*/
MNAMELEN - 1, /* max size*/
&size); /* real size*/
bzero( mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
/* Save "mounted from" info for mount point (NULL pad)*/
copystr( ROOTNAME, /* device name*/
mp->mnt_stat.f_mntfromname, /* save area*/
MNAMELEN - 1, /* max size*/
&size); /* real size*/
bzero( mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
/*
* Attempt the mount
*/
err = VFS_MOUNT( mp, NULL, NULL, NULL, p);
if( err)
goto error_2;
/* Add fs to list of mounted file systems*/
CIRCLEQ_INSERT_TAIL( &mountlist, mp, mnt_list);
/* Unlock mount point*/
vfs_unlock(mp);
/* root mount, update system time from FS specific data*/
inittodr( mp->mnt_time);
goto success;
error_2: /* mount error*/
/* unlock before failing*/
vfs_unlock( mp);
error_1: /* lock error*/
/* free mount struct before failing*/
free( mp, M_MOUNT);
success:
return( err);
}
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