Root/fs/befs/inode.c

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

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