From: Roland Dreier <rdreier@xxxxxxxxx> Date: Wed, 13 Aug 2008 14:27:50 -0700 > I don't see how this could work. First, it seems that you have to let > the adapter know which connections are iSCSI connections so that it > knows when to try and parse iSCSI headers. It always starts from offset zero for never seen before connections. > So you're already not totally stateless. Yes, we are. > Then, since (AFAIK -- I'm not an expert on iSCSI and > especially I'm not an expert on what common practice is for current > implementations) the iSCSI PDUs can start at any offset in the TCP > stream, I don't see how a stateless adapter can even find the PDU > headers to parse -- there's not any way that I know of to recognize > where a PDU boundary is without keeping track of the lengths of all the > PDUs that go by (ie you need per-connection state). Like I said, you retain a "flow cache" (say it a million times, "flow cache") that remembers the current parameters and the buffers currently assigned to that flow and what offset within those buffers. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
