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55 lines
1.2 KiB
55 lines
1.2 KiB
// 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 <[email protected]> |
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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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