/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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.
 */

#include <sys/cdefs.h>
#include "opt_quota.h"
#include "opt_ufs.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/socket.h>
#include <sys/vnode.h>

#include <ufs/ufs/extattr.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

MALLOC_DEFINE(M_UFSMNT, "ufs_mount", "UFS mount structure");

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

        error = VFS_VGET(mp, (ino_t)UFS_ROOTINO, flags, &nvp);
        if (error)
                return (error);
        *vpp = nvp;
        return (0);
}

/*
 * Do operations associated with quotas
 */
int
ufs_quotactl(struct mount *mp, int cmds, uid_t id, void *arg, bool *mp_busy)
{
#ifndef QUOTA
        return (EOPNOTSUPP);
#else
        struct thread *td;
        int cmd, type, error;

        td = curthread;
        cmd = cmds >> SUBCMDSHIFT;
        type = cmds & SUBCMDMASK;
        if (id == -1) {
                switch (type) {
                case USRQUOTA:
                        id = td->td_ucred->cr_ruid;
                        break;

                case GRPQUOTA:
                        id = td->td_ucred->cr_rgid;
                        break;

                default:
                        return (EINVAL);
                }
        }
        if ((uint64_t)type >= MAXQUOTAS)
                return (EINVAL);

        switch (cmd) {
        case Q_QUOTAON:
                error = quotaon(td, mp, type, arg, mp_busy);
                break;

        case Q_QUOTAOFF:
                vfs_ref(mp);
                KASSERT(*mp_busy,
                    ("%s called without busied mount", __func__));
                vn_start_write(NULL, &mp, V_WAIT);
                vfs_unbusy(mp);
                *mp_busy = false;
                error = quotaoff(td, mp, type);
                vn_finished_write(mp);
                vfs_rel(mp);
                break;

        case Q_SETQUOTA32:
                error = setquota32(td, mp, id, type, arg);
                break;

        case Q_SETUSE32:
                error = setuse32(td, mp, id, type, arg);
                break;

        case Q_GETQUOTA32:
                error = getquota32(td, mp, id, type, arg);
                break;

        case Q_SETQUOTA:
                error = setquota(td, mp, id, type, arg);
                break;

        case Q_SETUSE:
                error = setuse(td, mp, id, type, arg);
                break;

        case Q_GETQUOTA:
                error = getquota(td, mp, id, type, arg);
                break;

        case Q_GETQUOTASIZE:
                error = getquotasize(td, mp, id, type, arg);
                break;

        case Q_SYNC:
                error = qsync(mp);
                break;

        default:
                error = EINVAL;
                break;
        }
        return (error);
#endif
}

/*
 * Initial UFS filesystems, done only once.
 */
int
ufs_init(struct vfsconf *vfsp)
{

#ifdef QUOTA
        dqinit();
#endif
#ifdef UFS_DIRHASH
        ufsdirhash_init();
#endif
        return (0);
}

/*
 * Uninitialise UFS filesystems, done before module unload.
 */
int
ufs_uninit(struct vfsconf *vfsp)
{

#ifdef QUOTA
        dquninit();
#endif
#ifdef UFS_DIRHASH
        ufsdirhash_uninit();
#endif
        return (0);
}