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