| 1 | |
| 2 | |
| 3 | * inode.c
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| 4 | *
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| 5 | * Copyright (C) 2001 Will Dyson <[email protected]>
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| 6 |
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| 7 |
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| 8 | #include <linux/fs.h>
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| 9 |
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| 10 | #include "befs.h"
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| 11 | #include "inode.h"
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| 12 |
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| 13 | |
| 14 | * Validates the correctness of the befs inode
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| 15 | * Returns BEFS_OK if the inode should be used, otherwise
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| 16 | * returns BEFS_BAD_INODE
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| 17 |
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| 18 | int
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| 19 | befs_check_inode(struct super_block *sb, befs_inode *raw_inode,
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| 20 | befs_blocknr_t inode)
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| 21 | {
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| 22 | u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
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| 23 | befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
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| 24 | u32 flags = fs32_to_cpu(sb, raw_inode->flags);
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| 25 |
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| 26 |
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| 27 | if (magic1 != BEFS_INODE_MAGIC1) {
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| 28 | befs_error(sb,
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| 29 | "Inode has a bad magic header - inode = %lu",
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| 30 | (unsigned long)inode);
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| 31 | return BEFS_BAD_INODE;
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| 32 | }
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| 33 |
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| 34 | |
| 35 | * Sanity check2: inodes store their own block address. Check it.
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| 36 |
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| 37 | if (inode != iaddr2blockno(sb, &ino_num)) {
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| 38 | befs_error(sb, "inode blocknr field disagrees with vfs "
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| 39 | "VFS: %lu, Inode %lu", (unsigned long)
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| 40 | inode, (unsigned long)iaddr2blockno(sb, &ino_num));
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| 41 | return BEFS_BAD_INODE;
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| 42 | }
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| 43 |
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| 44 | |
| 45 | * check flag
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| 46 |
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| 47 |
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| 48 | if (!(flags & BEFS_INODE_IN_USE)) {
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| 49 | befs_error(sb, "inode is not used - inode = %lu",
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| 50 | (unsigned long)inode);
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| 51 | return BEFS_BAD_INODE;
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| 52 | }
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| 53 |
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| 54 | return BEFS_OK;
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| 55 | }
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