Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * inode.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "befs.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "inode.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  * Validates the correctness of the befs inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  * Returns BEFS_OK if the inode should be used, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)  * returns BEFS_BAD_INODE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) befs_check_inode(struct super_block *sb, befs_inode *raw_inode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		 befs_blocknr_t inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	u32 flags = fs32_to_cpu(sb, raw_inode->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	/* check magic header. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (magic1 != BEFS_INODE_MAGIC1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		befs_error(sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 			   "Inode has a bad magic header - inode = %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 			   (unsigned long)inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		return BEFS_BAD_INODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	 * Sanity check2: inodes store their own block address. Check it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	if (inode != iaddr2blockno(sb, &ino_num)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		befs_error(sb, "inode blocknr field disagrees with vfs "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			   "VFS: %lu, Inode %lu", (unsigned long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 			   inode, (unsigned long)iaddr2blockno(sb, &ino_num));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		return BEFS_BAD_INODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	 * check flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (!(flags & BEFS_INODE_IN_USE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		befs_error(sb, "inode is not used - inode = %lu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			   (unsigned long)inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		return BEFS_BAD_INODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	return BEFS_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }