/*      $OpenBSD: ufs_vfsops.c,v 1.21 2025/09/20 13:53:36 mpi Exp $     */
/*      $NetBSD: ufs_vfsops.c,v 1.4 1996/02/09 22:36:12 christos Exp $  */

/*
 * Copyright (c) 1991, 1993, 1994
 *      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. 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.
 *
 *      @(#)ufs_vfsops.c        8.4 (Berkeley) 4/16/94
 */

#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <sys/specdev.h>

#include <ufs/ufs/quota.h>
#include <ufs/ufs/inode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/ufs_extern.h>
#ifdef UFS_DIRHASH
#include <ufs/ufs/dir.h>
#include <ufs/ufs/dirhash.h>
#endif

/*
 * Make a filesystem operational.
 * Nothing to do at the moment.
 */
int
ufs_start(struct mount *mp, int flags, struct proc *p)
{
        return (0);
}

/*
 * Return the root of a filesystem.
 */
int
ufs_root(struct mount *mp, struct vnode **vpp)
{
        struct vnode *nvp;
        int error;

        if ((error = VFS_VGET(mp, ROOTINO, &nvp)) != 0)
                return (error);
        *vpp = nvp;
        return (0);
}

/*
 * Verify a remote client has export rights and return these rights via.
 * exflagsp and credanonp.
 */
int
ufs_check_export(struct mount *mp, struct mbuf *nam, int *exflagsp,
    struct ucred **credanonp) 
{
        struct netcred *np;
        struct ufsmount *ump = VFSTOUFS(mp);

        /*
         * Get the export permission structure for this <mp, client> tuple.
         */
        np = vfs_export_lookup(mp, &ump->um_export, nam);
        if (np == NULL)
                return (EACCES);

        *exflagsp = np->netc_exflags;
        *credanonp = &np->netc_anon;
        return (0);
}

/*
 * Initialize UFS file systems, done only once.
 */
int
ufs_init(struct vfsconf *vfsp)
{
        static int done;

        if (done)
                return (0);
        done = 1;
        ufs_ihashinit();
        ufs_quota_init();
#ifdef UFS_DIRHASH
        ufsdirhash_init();
#endif

        return (0);
}

/*
 * This is the generic part of fhtovp called after the underlying
 * filesystem has validated the file handle.
 */
int
ufs_fhtovp(struct mount *mp, struct ufid *ufhp, struct vnode **vpp)
{
        struct inode *ip;
        struct vnode *nvp;
        int error;

        if ((error = VFS_VGET(mp, ufhp->ufid_ino, &nvp)) != 0) {
                *vpp = NULL;
                return (error);
        }
        ip = VTOI(nvp);
        if (DIP(ip, mode) == 0 || DIP(ip, gen) != ufhp->ufid_gen) {
                vput(nvp);
                *vpp = NULL;
                return (ESTALE);
        }
        *vpp = nvp;
        return (0);
}