On Wed, Oct 08, 2008 at 09:56:41AM +0800, Tiger Yang wrote: > I have looked the patch for btrfs about this. We are different. > Btrfs store the whole xattr name including the prefix "user." > "trusted.", we store index number instead of it. I looked at the git tree and there are two users of ocfs2_xattr_handler(). (1) for using the ->list handler in listattr. That's something I fixed in btrfs that I wanted to point you to. The whole concept of a ->list handler is stupid, and it was only added as a hack for the tmpfs "generic" xattr support which is a mess. Instead of looking up a handler that would only do the same thing anyway for all on-disk attributes just call the code directly and have a map from index to prefix (look at fs/xfs/linux-2.6/xfs_xattr.c for an example). You also have a check for OCFS2_MOUNT_NOUSERXATTR for the user attributes, but that's much easier done by just checking the index in an if (and I'd personally just kill it completely, the options doesn't seem useful - but that's an unrelated bit) (2) For generating the hash. I don't quite understand why you want to also hash the prefix if it's not store on disk anyway but sorted into the numeric buckets. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html