The Lookup Operation

Now we should allow searching for inodes inside directories, based on their names - a simple "ls" won't work without stamfs_iop_lookup:

• Make sure the parameters are sane (e.g. file-name is not too long).
• Scan the directory for an entry with the desired name.
• If we found it - load the inode from disk, using the inode number (see next slide).
• add the dentry as a child of the parent directory, in the dcache.

Originally written by guy keren