root / prex-0.9.0 / usr / server / fs / arfs / arfs_vfsops.c @ 03e9c04a
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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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} |