996c772f58
changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
287 lines
6.9 KiB
C
287 lines
6.9 KiB
C
/*
|
|
* Copyright (c) 1992, 1993, 1995
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software donated to Berkeley by
|
|
* Jan-Simon Pendry.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)kernfs_vfsops.c 8.10 (Berkeley) 5/14/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Kernel params Filesystem
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/types.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/malloc.h>
|
|
|
|
#include <miscfs/specfs/specdev.h>
|
|
#include <miscfs/kernfs/kernfs.h>
|
|
|
|
dev_t rrootdev = NODEV;
|
|
|
|
static int cdevvp __P((dev_t dev, struct vnode **vpp));
|
|
static int kernfs_init __P((struct vfsconf *vfsp));
|
|
static int kernfs_mount __P((struct mount *mp, char *path, caddr_t data,
|
|
struct nameidata *ndp, struct proc *p));
|
|
static int kernfs_start __P((struct mount *mp, int flags, struct proc *p));
|
|
static int kernfs_unmount __P((struct mount *mp, int mntflags,
|
|
struct proc *p));
|
|
static int kernfs_root __P((struct mount *mp, struct vnode **vpp));
|
|
static int kernfs_statfs __P((struct mount *mp, struct statfs *sbp,
|
|
struct proc *p));
|
|
|
|
static int
|
|
kernfs_init(vfsp)
|
|
struct vfsconf *vfsp;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
kernfs_get_rrootdev()
|
|
{
|
|
static int tried = 0;
|
|
int bmaj = major(rootdev);
|
|
int cmaj;
|
|
|
|
if (tried) {
|
|
/* Already did it once. */
|
|
return;
|
|
}
|
|
tried = 1;
|
|
|
|
if (!bdevsw[bmaj]) {
|
|
panic("root dev has no bdevsw");
|
|
}
|
|
if (rootdev == NODEV)
|
|
return;
|
|
for (cmaj = 0; cmaj < nchrdev; cmaj++) {
|
|
rrootdev = makedev(cmaj, minor(rootdev));
|
|
if (chrtoblk(rrootdev) == rootdev)
|
|
return;
|
|
}
|
|
rrootdev = NODEV;
|
|
printf("kernfs_get_rrootdev: no raw root device\n");
|
|
}
|
|
|
|
/*
|
|
* Mount the Kernel params filesystem
|
|
*/
|
|
static int
|
|
kernfs_mount(mp, path, data, ndp, p)
|
|
struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
int error = 0;
|
|
u_int size;
|
|
struct kernfs_mount *fmp;
|
|
struct vnode *rvp;
|
|
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_mount(mp = %x)\n", mp);
|
|
#endif
|
|
|
|
/*
|
|
* Update is a no-op
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE)
|
|
return (EOPNOTSUPP);
|
|
|
|
MALLOC(fmp, struct kernfs_mount *, sizeof(struct kernfs_mount),
|
|
M_UFSMNT, M_WAITOK); /* XXX */
|
|
|
|
error = getnewvnode(VT_KERNFS, mp, kernfs_vnodeop_p, &rvp); /* XXX */
|
|
if (error) {
|
|
FREE(fmp, M_UFSMNT);
|
|
return (error);
|
|
}
|
|
|
|
rvp->v_type = VDIR;
|
|
rvp->v_flag |= VROOT;
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_mount: root vp = %x\n", rvp);
|
|
#endif
|
|
fmp->kf_root = rvp;
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
mp->mnt_data = (qaddr_t) fmp;
|
|
vfs_getnewfsid(mp);
|
|
|
|
(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
|
|
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
|
|
bcopy("kernfs", mp->mnt_stat.f_mntfromname, sizeof("kernfs"));
|
|
(void)kernfs_statfs(mp, &mp->mnt_stat, p);
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_mount: at %s\n", mp->mnt_stat.f_mntonname);
|
|
#endif
|
|
|
|
kernfs_get_rrootdev();
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
kernfs_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
kernfs_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
int error;
|
|
int flags = 0;
|
|
struct vnode *rootvp = VFSTOKERNFS(mp)->kf_root;
|
|
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_unmount(mp = %x)\n", mp);
|
|
#endif
|
|
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
|
|
/*
|
|
* Clear out buffer cache. I don't think we
|
|
* ever get anything cached at this level at the
|
|
* moment, but who knows...
|
|
*/
|
|
if (rootvp->v_usecount > 1)
|
|
return (EBUSY);
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_unmount: calling vflush\n");
|
|
#endif
|
|
error = vflush(mp, rootvp, flags);
|
|
if (error)
|
|
return (error);
|
|
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
vprint("kernfs root", rootvp);
|
|
#endif
|
|
/*
|
|
* Release reference on underlying root vnode
|
|
*/
|
|
vrele(rootvp);
|
|
/*
|
|
* And blow it away for future re-use
|
|
*/
|
|
vgone(rootvp);
|
|
/*
|
|
* Finally, throw away the kernfs_mount structure
|
|
*/
|
|
free(mp->mnt_data, M_UFSMNT); /* XXX */
|
|
mp->mnt_data = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
kernfs_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct proc *p = curproc; /* XXX */
|
|
struct vnode *vp;
|
|
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_root(mp = %x)\n", mp);
|
|
#endif
|
|
|
|
/*
|
|
* Return locked reference to root.
|
|
*/
|
|
vp = VFSTOKERNFS(mp)->kf_root;
|
|
VREF(vp);
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
kernfs_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
#ifdef KERNFS_DIAGNOSTIC
|
|
printf("kernfs_statfs(mp = %x)\n", mp);
|
|
#endif
|
|
|
|
sbp->f_flags = 0;
|
|
sbp->f_bsize = DEV_BSIZE;
|
|
sbp->f_iosize = DEV_BSIZE;
|
|
sbp->f_blocks = 2; /* 1K to keep df happy */
|
|
sbp->f_bfree = 0;
|
|
sbp->f_bavail = 0;
|
|
sbp->f_files = 0;
|
|
sbp->f_ffree = 0;
|
|
if (sbp != &mp->mnt_stat) {
|
|
sbp->f_type = mp->mnt_vfc->vfc_typenum;
|
|
bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
|
|
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
|
|
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct vfsops kernfs_vfsops = {
|
|
kernfs_mount,
|
|
kernfs_start,
|
|
kernfs_unmount,
|
|
kernfs_root,
|
|
kernfs_quotactl,
|
|
kernfs_statfs,
|
|
kernfs_sync,
|
|
kernfs_vget,
|
|
kernfs_fhtovp,
|
|
kernfs_vptofh,
|
|
kernfs_init,
|
|
};
|
|
|
|
VFS_SET(kernfs_vfsops, kernfs, MOUNT_KERNFS, VFCF_SYNTHETIC);
|