patch-2.4.20 linux-2.4.20/fs/befs/inode.c

• Lines: 53
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/befs/inode.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/befs/inode.c linux-2.4.20/fs/befs/inode.c
@@ -0,0 +1,52 @@
+/*
+ * inode.c
+ * 
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
+ */
+
+#include <linux/fs.h>
+
+#include "befs_fs.h"
+#include "endian.h"
+
+/*
+	Validates the correctness of the befs inode
+	Returns BEFS_OK if the inode should be used, otherwise
+	returns BEFS_BAD_INODE
+*/
+int
+befs_check_inode(struct super_block *sb, befs_inode * raw_inode,
+		 befs_blocknr_t inode)
+{
+	__u32 magic1 = fs32_to_cpu(sb, raw_inode->magic1);
+	befs_inode_addr ino_num = fsrun_to_cpu(sb, raw_inode->inode_num);
+	__u32 flags = fs32_to_cpu(sb, raw_inode->flags);
+
+	/* check magic header. */
+	if (magic1 != BEFS_INODE_MAGIC1) {
+		befs_error(sb,
+			   "Inode has a bad magic header - inode = %lu", inode);
+		return BEFS_BAD_INODE;
+	}
+
+	/*
+	 * Sanity check2: inodes store their own block address. Check it.
+	 */
+	if (inode != iaddr2blockno(sb, &ino_num)) {
+		befs_error(sb, "inode blocknr field disagrees with vfs "
+			   "VFS: %lu, Inode %lu",
+			   inode, iaddr2blockno(sb, &ino_num));
+		return BEFS_BAD_INODE;
+	}
+
+	/*
+	 * check flag
+	 */
+
+	if (!(flags & BEFS_INODE_IN_USE)) {
+		befs_error(sb, "inode is not used - inode = %lu", inode);
+		return BEFS_BAD_INODE;
+	}
+
+	return BEFS_OK;
+}