Spdk/iscsi at ab0c11353ed1ab18cad5d5e98ea96a71f4f88fd9 - Spdk

History

Dariusz Stojaczyk ab0c11353e bdev/iscsi: simplify module finish Bdev module fini is triggered after all bdevs get unregistered - this includes all iscsi bdevs. There's no need to unregister/free them manually. A few words for the iscsi_logout_async call, which was never possibly called, but is now completely removed: Destroying the iscsi context, which is done at bdev destruction, will "tear down any existing connection" as the libiscsi docs say, so there's apparently no need to perform a manual logout. Change-Id: Id163668a19a1d4b9bcd7538ecd1c0febae0fe47a Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/420567 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>		2018-07-27 16:25:17 +00:00
..
bdev_iscsi_rpc.c	rpc/bdev: construct RPC return a string instead array	2018-06-22 21:12:43 +00:00
bdev_iscsi.c	bdev/iscsi: simplify module finish	2018-07-27 16:25:17 +00:00
bdev_iscsi.h	bdev: add delete_iscsi_bdev call	2018-06-22 17:24:18 +00:00
Makefile	bdev/iscsi: add RPC support and cofnig dump	2018-06-05 17:52:06 +00:00
README	bdev: add iSCSI initiator bdev module	2018-03-21 20:35:42 -04:00

README

This is a very rough initial cut at an SPDK iSCSI initiator bdev module.  It
only performs operations (connect, login, read cap, read/write).
But this passes basic verify tests with bdevperf and with fio.

Configuration file for iSCSI initiator is in the following format.
Note that the "/0" at the end means "LUN 0".

[iSCSI_Initiator]
  URL iscsi://127.0.0.1/iqn.2016-06.io.spdk:disk1/0 iSCSI0

To Do Items
===========
1) Create RPCs.
2) Use asynchronous polling for connect/login/disconnect.  Read/write is already
   using libiscsi event framework.
3) Choose initiator name as part of RPC configuration.  Currently this is hardcoded
   with g_initiator string.
4) Implement reset path.
5) Implement unmap path.
6) Use REPORT_LUNS to dynamically find all of the block devices attached to the
   iSCSI target node instead of hard-coding LUN 0.  This will need some extra
   investigation in libiscsi.  Currently the full URL is used which includes the LUN.
   Not sure yet how we can login to target node and then submit IO to different
   LUNs.  Let's treat this as low priority for now.