projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 1da177e4 LT |
2 | /* |
| 3 | * inode.c | |
| 85a06b30 | 4 | * |
| 1da177e4 LT |
5 | * Copyright (C) 2001 Will Dyson <[email protected]> |
| 6 | */ | |
| 7 | ||
| 8 | #include <linux/fs.h> | |
| 9 | ||
| 10 | #include "befs.h" | |
| 11 | #include "inode.h" | |
| 1da177e4 LT |
12 | |
| 13 | /* | |
| 85a06b30 LB |
14 | * Validates the correctness of the befs inode |
| 15 | * Returns BEFS_OK if the inode should be used, otherwise | |
| 16 | * returns BEFS_BAD_INODE | |
| 17 | */ | |
| 1da177e4 | 18 | int |
| 85a06b30 | 19 | befs_check_inode(struct super_block *sb, befs_inode *raw_inode, |
| 1da177e4 LT |
20 | befs_blocknr_t inode) |
| 21 | { | |
| 22 | u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1); | |
| 23 | befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num); | |
| 24 | u32 flags = fs32_to_cpu(sb, raw_inode->flags); | |
| 25 | ||
| 26 | /* check magic header. */ | |
| 27 | if (magic1 != BEFS_INODE_MAGIC1) { | |
| 28 | befs_error(sb, | |
| dac52fc1 FF |
29 | "Inode has a bad magic header - inode = %lu", |
| 30 | (unsigned long)inode); | |
| 1da177e4 LT |
31 | return BEFS_BAD_INODE; |
| 32 | } | |
| 33 | ||
| 34 | /* | |
| 35 | * Sanity check2: inodes store their own block address. Check it. | |
| 36 | */ | |
| 37 | if (inode != iaddr2blockno(sb, &ino_num)) { | |
| 38 | befs_error(sb, "inode blocknr field disagrees with vfs " | |
| dac52fc1 FF |
39 | "VFS: %lu, Inode %lu", (unsigned long) |
| 40 | inode, (unsigned long)iaddr2blockno(sb, &ino_num)); | |
| 1da177e4 LT |
41 | return BEFS_BAD_INODE; |
| 42 | } | |
| 43 | ||
| 44 | /* | |
| 45 | * check flag | |
| 46 | */ | |
| 47 | ||
| 48 | if (!(flags & BEFS_INODE_IN_USE)) { | |
| dac52fc1 FF |
49 | befs_error(sb, "inode is not used - inode = %lu", |
| 50 | (unsigned long)inode); | |
| 1da177e4 LT |
51 | return BEFS_BAD_INODE; |
| 52 | } | |
| 53 | ||
| 54 | return BEFS_OK; | |
| 55 | } |