Annotation of prex-old/usr/server/fs/ramfs/ramfs_vfsops.c, Revision 1.1
1.1 ! nbrk 1: /*
! 2: * Copyright (c) 2006-2007, Kohsuke Ohtani
! 3: * All rights reserved.
! 4: *
! 5: * Redistribution and use in source and binary forms, with or without
! 6: * modification, are permitted provided that the following conditions
! 7: * are met:
! 8: * 1. Redistributions of source code must retain the above copyright
! 9: * notice, this list of conditions and the following disclaimer.
! 10: * 2. Redistributions in binary form must reproduce the above copyright
! 11: * notice, this list of conditions and the following disclaimer in the
! 12: * documentation and/or other materials provided with the distribution.
! 13: * 3. Neither the name of the author nor the names of any co-contributors
! 14: * may be used to endorse or promote products derived from this software
! 15: * without specific prior written permission.
! 16: *
! 17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 27: * SUCH DAMAGE.
! 28: */
! 29:
! 30: #include <sys/vnode.h>
! 31: #include <sys/mount.h>
! 32:
! 33: #include <errno.h>
! 34:
! 35: #include "ramfs.h"
! 36:
! 37: extern struct vnops ramfs_vnops;
! 38:
! 39: static int ramfs_mount(mount_t mp, char *dev, int flags, void *data);
! 40: static int ramfs_unmount(mount_t mp);
! 41: #define ramfs_sync ((vfsop_sync_t)vfs_nullop)
! 42: #define ramfs_vget ((vfsop_vget_t)vfs_nullop)
! 43: #define ramfs_statfs ((vfsop_statfs_t)vfs_nullop)
! 44:
! 45: /*
! 46: * File system operations
! 47: */
! 48: struct vfsops ramfs_vfsops = {
! 49: ramfs_mount, /* mount */
! 50: ramfs_unmount, /* unmount */
! 51: ramfs_sync, /* sync */
! 52: ramfs_vget, /* vget */
! 53: ramfs_statfs, /* statfs */
! 54: &ramfs_vnops, /* vnops */
! 55: };
! 56:
! 57: /*
! 58: * Mount a file system.
! 59: */
! 60: static int
! 61: ramfs_mount(mount_t mp, char *dev, int flags, void *data)
! 62: {
! 63: struct ramfs_node *node;
! 64:
! 65: dprintf("ramfs_mount: dev=%s\n", dev);
! 66:
! 67: /* Create a root node */
! 68: node = ramfs_allocate_node("/", VDIR);
! 69: if (node == NULL)
! 70: return ENOMEM;
! 71: mp->m_root->v_data = node;
! 72: return 0;
! 73: }
! 74:
! 75: /*
! 76: * Unmount a file system.
! 77: *
! 78: * NOTE: Currently, we don't support unmounting of the RAMFS. This is
! 79: * because we have to deallocate all nodes included in all sub
! 80: * directories, and it requires more work...
! 81: */
! 82: static int
! 83: ramfs_unmount(mount_t mp)
! 84: {
! 85:
! 86: return EBUSY;
! 87: }
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