/*      $NetBSD: sysvbfs.c,v 1.19 2021/06/29 22:34:07 dholland Exp $    */

/*-
 * Copyright (c) 2004 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by UCHIYAMA Yasushi.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: sysvbfs.c,v 1.19 2021/06/29 22:34:07 dholland Exp $");

#include <sys/resource.h>
#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/module.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/genfs/genfs_node.h>
#include <fs/sysvbfs/sysvbfs.h>

MODULE(MODULE_CLASS_VFS, sysvbfs, NULL);

/* External interfaces */

int (**sysvbfs_vnodeop_p)(void *);      /* filled by getnewvnode (vnode.h) */

const struct vnodeopv_entry_desc sysvbfs_vnodeop_entries[] = {
        { &vop_default_desc, vn_default_error },
        { &vop_parsepath_desc, genfs_parsepath },       /* parsepath */
        { &vop_lookup_desc, sysvbfs_lookup },           /* lookup */
        { &vop_create_desc, sysvbfs_create },           /* create */
        { &vop_mknod_desc, genfs_eopnotsupp },          /* mknod */
        { &vop_open_desc, sysvbfs_open },               /* open */
        { &vop_close_desc, sysvbfs_close },             /* close */
        { &vop_access_desc, sysvbfs_access },           /* access */
        { &vop_accessx_desc, genfs_accessx },           /* accessx */
        { &vop_getattr_desc, sysvbfs_getattr },         /* getattr */
        { &vop_setattr_desc, sysvbfs_setattr },         /* setattr */
        { &vop_read_desc, sysvbfs_read },               /* read */
        { &vop_write_desc, sysvbfs_write },             /* write */
        { &vop_fallocate_desc, genfs_eopnotsupp },      /* fallocate */
        { &vop_fdiscard_desc, genfs_eopnotsupp },       /* fdiscard */
        { &vop_fcntl_desc, genfs_fcntl },               /* fcntl */
        { &vop_ioctl_desc, genfs_enoioctl },            /* ioctl */
        { &vop_poll_desc, genfs_poll },                 /* poll */
        { &vop_kqfilter_desc, genfs_kqfilter },         /* kqfilter */
        { &vop_revoke_desc, genfs_revoke },             /* revoke */
        { &vop_mmap_desc, genfs_mmap },                 /* mmap */
        { &vop_fsync_desc, sysvbfs_fsync },             /* fsync */
        { &vop_seek_desc, genfs_seek },                 /* seek */
        { &vop_remove_desc, sysvbfs_remove },           /* remove */
        { &vop_link_desc, genfs_eopnotsupp },           /* link */
        { &vop_rename_desc, sysvbfs_rename },           /* rename */
        { &vop_mkdir_desc, genfs_eopnotsupp },          /* mkdir */
        { &vop_rmdir_desc, genfs_eopnotsupp },          /* rmdir */
        { &vop_symlink_desc, genfs_eopnotsupp },        /* symlink */
        { &vop_readdir_desc, sysvbfs_readdir },         /* readdir */
        { &vop_readlink_desc, genfs_eopnotsupp },       /* readlink */
        { &vop_abortop_desc, genfs_abortop },           /* abortop */
        { &vop_inactive_desc, sysvbfs_inactive },       /* inactive */
        { &vop_reclaim_desc, sysvbfs_reclaim },         /* reclaim */
        { &vop_lock_desc, genfs_lock },                 /* lock */
        { &vop_unlock_desc, genfs_unlock },             /* unlock */
        { &vop_bmap_desc, sysvbfs_bmap },               /* bmap */
        { &vop_strategy_desc, sysvbfs_strategy },       /* strategy */
        { &vop_print_desc, sysvbfs_print },             /* print */
        { &vop_islocked_desc, genfs_islocked },         /* islocked */
        { &vop_pathconf_desc, sysvbfs_pathconf },       /* pathconf */
        { &vop_advlock_desc, sysvbfs_advlock },         /* advlock */
        { &vop_bwrite_desc, vn_bwrite },                /* bwrite */
        { &vop_getpages_desc, genfs_getpages },         /* getpages */
        { &vop_putpages_desc, genfs_putpages },         /* putpages */
        { NULL, NULL }
};

const struct vnodeopv_desc sysvbfs_vnodeop_opv_desc = {
        &sysvbfs_vnodeop_p,
        sysvbfs_vnodeop_entries
};

const struct vnodeopv_desc *sysvbfs_vnodeopv_descs[] = {
        &sysvbfs_vnodeop_opv_desc,
        NULL,
};

const struct genfs_ops sysvbfs_genfsops = {
        .gop_size = genfs_size,
        .gop_alloc = sysvbfs_gop_alloc,
        .gop_write = genfs_gop_write,
        .gop_putrange = genfs_gop_putrange,
};

struct vfsops sysvbfs_vfsops = {
        .vfs_name = MOUNT_SYSVBFS,
        .vfs_min_mount_data = sizeof (struct sysvbfs_args),
        .vfs_mount = sysvbfs_mount,
        .vfs_start = sysvbfs_start,
        .vfs_unmount = sysvbfs_unmount,
        .vfs_root = sysvbfs_root,
        .vfs_quotactl = (void *)eopnotsupp,
        .vfs_statvfs = sysvbfs_statvfs,
        .vfs_sync = sysvbfs_sync,
        .vfs_vget = sysvbfs_vget,
        .vfs_loadvnode = sysvbfs_loadvnode,
        .vfs_fhtovp = sysvbfs_fhtovp,
        .vfs_vptofh = sysvbfs_vptofh,
        .vfs_init = sysvbfs_init,
        .vfs_reinit = sysvbfs_reinit,
        .vfs_done = sysvbfs_done,
        .vfs_snapshot = (void *)eopnotsupp,
        .vfs_extattrctl = vfs_stdextattrctl,
        .vfs_suspendctl = genfs_suspendctl,
        .vfs_renamelock_enter = genfs_renamelock_enter,
        .vfs_renamelock_exit = genfs_renamelock_exit,
        .vfs_fsync = (void *)eopnotsupp,
        .vfs_opv_descs = sysvbfs_vnodeopv_descs
};

static int
sysvbfs_modcmd(modcmd_t cmd, void *arg)
{

        switch (cmd) {
        case MODULE_CMD_INIT:
                return vfs_attach(&sysvbfs_vfsops);
        case MODULE_CMD_FINI:
                return vfs_detach(&sysvbfs_vfsops);
        default:
                return ENOTTY;
        }
}