1 /*
2 * inode.c
3 *
4 * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
5 */
6
7 #include <linux/fs.h>
8
9 #include "befs.h"
10 #include "inode.h"
11 #include "endian.h"
12
13 /*
14 Validates the correctness of the befs inode
15 Returns BEFS_OK if the inode should be used, otherwise
16 returns BEFS_BAD_INODE
17 */
18 int
befs_check_inode(struct super_block * sb,befs_inode * raw_inode,befs_blocknr_t inode)19 befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
20 befs_blocknr_t inode)
21 {
22 u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
23 befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
24 u32 flags = fs32_to_cpu(sb, raw_inode->flags);
25
26 /* check magic header. */
27 if (magic1 != BEFS_INODE_MAGIC1) {
28 befs_error(sb,
29 "Inode has a bad magic header - inode = %lu", inode);
30 return BEFS_BAD_INODE;
31 }
32
33 /*
34 * Sanity check2: inodes store their own block address. Check it.
35 */
36 if (inode != iaddr2blockno(sb, &ino_num)) {
37 befs_error(sb, "inode blocknr field disagrees with vfs "
38 "VFS: %lu, Inode %lu",
39 inode, iaddr2blockno(sb, &ino_num));
40 return BEFS_BAD_INODE;
41 }
42
43 /*
44 * check flag
45 */
46
47 if (!(flags & BEFS_INODE_IN_USE)) {
48 befs_error(sb, "inode is not used - inode = %lu", inode);
49 return BEFS_BAD_INODE;
50 }
51
52 return BEFS_OK;
53 }
54