53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
|
/*
|
||
|
|
* inode.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/fs.h>
|
||
|
|
|
||
|
|
#include "befs.h"
|
||
|
|
#include "inode.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
Validates the correctness of the befs inode
|
||
|
|
Returns BEFS_OK if the inode should be used, otherwise
|
||
|
|
returns BEFS_BAD_INODE
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
|
||
|
|
befs_blocknr_t inode)
|
||
|
|
{
|
||
|
|
u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
|
||
|
|
befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
|
||
|
|
u32 flags = fs32_to_cpu(sb, raw_inode->flags);
|
||
|
|
|
||
|
|
/* check magic header. */
|
||
|
|
if (magic1 != BEFS_INODE_MAGIC1) {
|
||
|
|
befs_error(sb,
|
||
|
|
"Inode has a bad magic header - inode = %lu", inode);
|
||
|
|
return BEFS_BAD_INODE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sanity check2: inodes store their own block address. Check it.
|
||
|
|
*/
|
||
|
|
if (inode != iaddr2blockno(sb, &ino_num)) {
|
||
|
|
befs_error(sb, "inode blocknr field disagrees with vfs "
|
||
|
|
"VFS: %lu, Inode %lu",
|
||
|
|
inode, iaddr2blockno(sb, &ino_num));
|
||
|
|
return BEFS_BAD_INODE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* check flag
|
||
|
|
*/
|
||
|
|
|
||
|
|
if (!(flags & BEFS_INODE_IN_USE)) {
|
||
|
|
befs_error(sb, "inode is not used - inode = %lu", inode);
|
||
|
|
return BEFS_BAD_INODE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return BEFS_OK;
|
||
|
|
}
|