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/*
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 * Copyright (c) 2006-2007, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * arfs_vfsops.c - vfs operations for archive file system.
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 */
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <ar.h>
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#include "arfs.h"
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extern struct vnops arfs_vnops;
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static int arfs_mount        (mount_t mp, char *dev, int flags, void *data);
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static int arfs_unmount        (mount_t mp);
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#define arfs_sync        ((vfsop_sync_t)vfs_nullop)
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#define arfs_vget        ((vfsop_vget_t)vfs_nullop)
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#define arfs_statfs        ((vfsop_statfs_t)vfs_nullop)
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/*
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 * File system operations
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 */
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const struct vfsops arfs_vfsops = {
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        arfs_mount,                /* mount */
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        arfs_unmount,                /* unmount */
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        arfs_sync,                /* sync */
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        arfs_vget,                /* vget */
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        arfs_statfs,                /* statfs */
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        &arfs_vnops,                /* vnops */
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};
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/*
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 * Mount a file system.
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 */
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static int
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arfs_mount(mount_t mp, char *dev, int flags, void *data)
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{
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        size_t size;
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        char *buf;
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        int error = 0;
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        DPRINTF(("arfs_mount: dev=%s\n", dev));
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        if ((buf = malloc(BSIZE)) == NULL)
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                return ENOMEM;
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        /* Read first block */
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        size = BSIZE;
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        error = device_read((device_t)mp->m_dev, buf, &size, 0);
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        if (error) {
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                DPRINTF(("arfs_mount: read error=%d\n", error));
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                goto out;
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        }
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        /* Check if the device includes valid archive image. */
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        if (strncmp(buf, ARMAG, SARMAG)) {
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                DPRINTF(("arfs_mount: invalid archive image!\n"));
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                error = EINVAL;
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                goto out;
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        }
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        /* Ok, we find the archive */
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        mp->m_flags |= MNT_RDONLY;
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 out:
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        free(buf);
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        return error;
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}
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static int
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arfs_unmount(mount_t mp)
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{
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        return 0;
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}