Annotation of prex/usr/server/fs/ramfs/ramfs_vfsops.c, Revision 1.1.1.1
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 *np;
64:
65: DPRINTF(("ramfs_mount: dev=%s\n", dev));
66:
67: /* Create a root node */
68: np = ramfs_allocate_node("/", VDIR);
69: if (np == NULL)
70: return ENOMEM;
71: mp->m_root->v_data = np;
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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