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 #include "endian.h" 12 13 /* 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 */ 18 int 19 befs_check_inode(struct super_block *sb, befs_inode * raw_inode, 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, 29 "Inode has a bad magic header - inode = %lu", inode); 30 return BEFS_BAD_INODE; 31 } 32 33 /* 34 * Sanity check2: inodes store their own block address. Check it. 35 */ 36 if (inode != iaddr2blockno(sb, &ino_num)) { 37 befs_error(sb, "inode blocknr field disagrees with vfs " 38 "VFS: %lu, Inode %lu", 39 inode, iaddr2blockno(sb, &ino_num)); 40 return BEFS_BAD_INODE; 41 } 42 43 /* 44 * check flag 45 */ 46 47 if (!(flags & BEFS_INODE_IN_USE)) { 48 befs_error(sb, "inode is not used - inode = %lu", inode); 49 return BEFS_BAD_INODE; 50 } 51 52 return BEFS_OK; 53 } 54