Annotation of prex-old/usr/server/fs/arfs/arfs_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: #include <sys/param.h>
33: #include <sys/buf.h>
34:
35: #include <stdlib.h>
36: #include <string.h>
37: #include <errno.h>
38: #include <ar.h>
39:
40: #include "arfs.h"
41:
42: extern struct vnops arfs_vnops;
43:
44:
45: static int arfs_mount(mount_t mp, char *dev, int flags, void *data);
46: static int arfs_unmount(mount_t mp);
47: #define arfs_sync ((vfsop_sync_t)vfs_nullop)
48: #define arfs_vget ((vfsop_vget_t)vfs_nullop)
49: #define arfs_statfs ((vfsop_statfs_t)vfs_nullop)
50:
51: /*
52: * File system operations
53: */
54: const struct vfsops arfs_vfsops = {
55: arfs_mount, /* mount */
56: arfs_unmount, /* unmount */
57: arfs_sync, /* sync */
58: arfs_vget, /* vget */
59: arfs_statfs, /* statfs */
60: &arfs_vnops, /* vnops */
61: };
62:
63: /*
64: * Mount a file system.
65: */
66: static int
67: arfs_mount(mount_t mp, char *dev, int flags, void *data)
68: {
69: size_t size;
70: char *buf;
71: int err = 0;
72:
73: dprintf("arfs_mount: dev=%s\n", dev);
74:
75: if ((buf = malloc(BSIZE)) == NULL)
76: return ENOMEM;
77:
78: /* Read first block */
79: size = BSIZE;
80: err = device_read((device_t)mp->m_dev, buf, &size, 0);
81: if (err) {
82: dprintf("arfs_mount: read error=%d\n", err);
83: goto out;
84: }
85:
86: /* Check if the device includes valid archive image. */
87: if (strncmp(buf, ARMAG, SARMAG)) {
88: dprintf("invalid archive image!\n");
89: err = EINVAL;
90: goto out;
91: }
92:
93: /* Ok, we find the archive */
94: mp->m_flags |= MNT_RDONLY;
95: out:
96: free(buf);
97: return err;
98: }
99:
100: static int
101: arfs_unmount(mount_t mp)
102: {
103: return 0;
104: }
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