56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* inode.c
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*
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* Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
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*/
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#include <linux/fs.h>
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#include "befs.h"
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#include "inode.h"
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/*
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* Validates the correctness of the befs inode
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* Returns BEFS_OK if the inode should be used, otherwise
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* returns BEFS_BAD_INODE
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*/
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int
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befs_check_inode(struct super_block *sb, befs_inode *raw_inode,
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befs_blocknr_t inode)
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{
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u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
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befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
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u32 flags = fs32_to_cpu(sb, raw_inode->flags);
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/* check magic header. */
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if (magic1 != BEFS_INODE_MAGIC1) {
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befs_error(sb,
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"Inode has a bad magic header - inode = %lu",
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(unsigned long)inode);
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return BEFS_BAD_INODE;
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}
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/*
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* Sanity check2: inodes store their own block address. Check it.
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*/
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if (inode != iaddr2blockno(sb, &ino_num)) {
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befs_error(sb, "inode blocknr field disagrees with vfs "
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"VFS: %lu, Inode %lu", (unsigned long)
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inode, (unsigned long)iaddr2blockno(sb, &ino_num));
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return BEFS_BAD_INODE;
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}
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/*
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* check flag
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*/
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if (!(flags & BEFS_INODE_IN_USE)) {
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befs_error(sb, "inode is not used - inode = %lu",
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(unsigned long)inode);
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return BEFS_BAD_INODE;
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}
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return BEFS_OK;
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}
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