scoutos / prex-0.9.0 / usr / server / fs / ramfs / ramfs_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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#include <sys/vnode.h> |
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#include <sys/mount.h> |
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#include <errno.h> |
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#include "ramfs.h" |
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extern struct vnops ramfs_vnops; |
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static int ramfs_mount(mount_t mp, char *dev, int flags, void *data); |
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static int ramfs_unmount(mount_t mp); |
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#define ramfs_sync ((vfsop_sync_t)vfs_nullop)
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#define ramfs_vget ((vfsop_vget_t)vfs_nullop)
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#define ramfs_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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struct vfsops ramfs_vfsops = {
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ramfs_mount, /* mount */
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ramfs_unmount, /* unmount */
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ramfs_sync, /* sync */
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ramfs_vget, /* vget */
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ramfs_statfs, /* statfs */
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&ramfs_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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ramfs_mount(mount_t mp, char *dev, int flags, void *data) |
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{ |
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struct ramfs_node *np;
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DPRINTF(("ramfs_mount: dev=%s\n", dev));
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/* Create a root node */
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np = ramfs_allocate_node("/", VDIR);
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if (np == NULL) |
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return ENOMEM;
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mp->m_root->v_data = np; |
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return 0; |
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} |
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/*
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* Unmount a file system.
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*
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* NOTE: Currently, we don't support unmounting of the RAMFS. This is
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* because we have to deallocate all nodes included in all sub
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* directories, and it requires more work...
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*/
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static int |
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ramfs_unmount(mount_t mp) |
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{ |
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return EBUSY;
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} |