* Forward the io() and cancel_io() hooks. Implemented the missing kernel

part.
* Implemented a good part of the kernel part for the support of
  do_iterative_fd_io(). The forwarding of the callbacks are missing yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29540 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/userlandfs/private/Requests.h

@@ -1753,6 +1753,7 @@ public:
 	DoIterativeFDIORequest() : Request(DO_ITERATIVE_FD_IO_REQUEST) {}
 	status_t GetAddressInfos(AddressInfo* infos, int32* count);
 
+	dev_t		nsid;
 	int			fd;
 	int32		request;
 	void*		cookie;