linux-kernel - Re: [PATCH][RFC 1/4/4/5] iSCSI-SCST's Makefile and Kconfig

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Date:	Tue, 13 Apr 2010 17:10:08 +0400
From:	Vladislav Bolkhovitin <vst@...b.net>
To:	linux-scsi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org,
	scst-devel <scst-devel@...ts.sourceforge.net>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Jeff Garzik <jeff@...zik.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bart Van Assche <bart.vanassche@...il.com>
Subject: Re: [PATCH][RFC 1/4/4/5] iSCSI-SCST's Makefile and Kconfig

This patch contains iSCSI-SCST's Makefile and Kconfig.

Signed-off-by: Vladislav Bolkhovitin <vst@...b.net>
---
 Kconfig  |   25 +++++++++++++++++++++++++
 Makefile |    6 ++++++
 2 files changed, 31 insertions(+)
 
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/Makefile linux-2.6.33/drivers/scst/iscsi-scst/Makefile
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/Makefile
+++ linux-2.6.33/drivers/scst/iscsi-scst/Makefile
@@ -0,0 +1,6 @@
+EXTRA_CFLAGS += -Iinclude/scst
+
+iscsi-scst-y := iscsi.o nthread.o config.o digest.o \
+	conn.o session.o target.o event.o param.o
+
+obj-$(CONFIG_SCST_ISCSI) += iscsi-scst.o
diff -uprN orig/linux-2.6.33/drivers/scst/iscsi-scst/Kconfig linux-2.6.33/drivers/scst/iscsi-scst/Kconfig
--- orig/linux-2.6.33/drivers/scst/iscsi-scst/Kconfig
+++ linux-2.6.33/drivers/scst/iscsi-scst/Kconfig
@@ -0,0 +1,25 @@
+config SCST_ISCSI
+	tristate "ISCSI Target"
+	depends on SCST && INET
+	default SCST
+	help
+	  ISCSI target driver for SCST framework. The iSCSI protocol has been
+	  defined in RFC 3720. To use it you should download from
+	  http://scst.sourceforge.net the user space part of it.
+
+config SCST_ISCSI_DEBUG_DIGEST_FAILURES
+	bool "Simulate iSCSI digest failures"
+	depends on SCST_ISCSI
+	help
+	  Simulates iSCSI digest failures in random places. Even when iSCSI
+	  traffic is sent over a TCP connection, the 16-bit TCP checksum is too
+	  weak for the requirements of a storage protocol. Furthermore, there
+	  are also instances where the TCP checksum does not protect iSCSI
+	  data, as when data is corrupted while being transferred on a PCI bus
+	  or while in memory. The iSCSI protocol therefore defines a 32-bit CRC
+	  digest on iSCSI packets in order to detect data corruption on an
+	  end-to-end basis. CRCs can be used on iSCSI PDU headers and/or data.
+	  Enabling this option allows to test digest failure recovery in the
+	  iSCSI initiator that is talking to SCST.
+
+	  If unsure, say "N".

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