1 files changed, 53 insertions, 0 deletions

diff --git a/fs/befs/inode.c b/fs/befs/inode.c
new file mode 100644
index 000000000000..d41c9247ae8a
--- /dev/null
+++ b/fs/befs/inode.c
@@ -0,0 +1,53 @@
+/*
+ * inode.c
+ * 
+ * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com>
+ */
+
+#include <linux/fs.h>
+
+#include "befs.h"
+#include "inode.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;
+}