linux-kernel - Re: [RFC PATCH 0/19] A kernel-level configfs enabled generic target engine for Linux v2.6.32

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Message-Id: <1252958394.2067.277.camel@haakon2.linux-iscsi.org>
Date:	Mon, 14 Sep 2009 12:59:54 -0700
From:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>,
	Douglas Gilbert <dgilbert@...erlog.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Hannes Reinecke <hare@...e.de>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Mike Christie <michaelc@...wisc.edu>,
	Joel Becker <joel.becker@...cle.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Christoph Hellwig <hch@....de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Florian Haas <florian.haas@...bit.com>,
	Philipp Reisner <philipp.reisner@...bit.com>
Subject: Re: [RFC PATCH 0/19] A kernel-level configfs enabled generic
	target engine for Linux v2.6.32

On Sun, 2009-09-13 at 13:10 +0300, Boaz Harrosh wrote:
> On 09/12/2009 04:55 AM, Nicholas A. Bellinger wrote:
> > Greetings all,
> > 
> > This is my humble request for review and inclusion of
> > Target_Core_Mod/ConfigFS v3.2 from lio-core-2.6.git code into mainline
> > v2.6.32.  With TCM v3.2, the two major SPC-4 SCSI target mode fabric
> > features that have now been completed: Persistent Reservation APTPL and
> > implict/explict ALUA are the first all optional SPC4 defined feature
> > implementation of PR and ALUA in the Linux OSS target theatre using an
> > upstream user-driven virtual filesystem directory hierarchy structure
> > based on configfs that can be configured in realtime in combination with
> > interpreted userspace code.
> > 
> > Both of these new features are now being used to provide Persistent Reservations
> > across target power loss and asymmetric multipath I/O to both Linux and non-Linux
> > clients.  There is also an optional ALUA transition delay logic that has been
> > included to futher debug and improve existing upstream client side Linux kernel code
> > using TCM v3.2. These patches have been diffed against v2.6.31, and tested on x86
> > 32-bit HVM, x86_64 KVM, and powerpc.
> > 
> > There is cleanup work continuing to make the TCM code to use dprintk(),
> > and some include cleanups, and other minor fixes.  The code has also
> > been run through checkpatch again since the posting in April, and all
> > errors have been removed, with the exception of one ConfigFS macro
> > define triggering a checkpatch false positive.
> > 
> > As with the posting of the TCM v3.0 code earlier in April, I have
> > decided to break up the submissions into the generic target_core_mod
> > piece (this patch series) and then a seperate one that will be appearing
> > in the next days for v3.2 of the LIO-Target iSCSI fabric module.
> > 
> > More Information about Target_Core_Mod/ConfigFS, and PR and ALUA:
> > 
> > http://www.linux-iscsi.org/index.php/Target_Core_Mod/ConfigFS
> > http://www.linux-iscsi.org/index.php/Persistent_Reservations
> > http://www.linux-iscsi.org/index.php/ALUA
> > 
> > The complete v3.x TCM CLI operations set can be found here:
> > 
> > http://www.linux-iscsi.org/index.php/Lio-utils#v3.1_TCM_CLI_operations
> > 
> > Instructions and examples for getting setup:
> > 
> > http://linux-iscsi.org/builds/docs/LIO-3.0-Users_Reference_Manual.pdf
> > http://www.linux-iscsi.org/index.php/Howto#Start_target_core_mod
> > 
> > Constructive comments are welcome,
> > 
> > --nab
> > 
> > ==> target_core_alua.patch <==
> > [RFC PATCH 1/19] Target_Core_Mod Asymmetric Logical Unit Assignment (ALUA) support
> > ==> target_core_configfs.patch <==
> > [RFC PATCH 2/19] Target_Core_Mod ConfigFS infrastructure
> > ==> target_core_device.patch <==
> > [RFC PATCH 3/19] Target_Core_Mod device core infrastructure
> > ==> target_core_file.patch <==
> > [RFC PATCH 4/19] Target_Core_Mod FILEIO <-> Linux/VFS subsystem
> > ==> target_core_hba.patch <==
> > [RFC PATCH 5/19] Target_Core_Mod HBA core infrastructure
> > ==> target_core_iblock.patch <==
> > [RFC PATCH 6/19] Target_Core_Mod IBLOCK <-> Linux/Block subsystem plugin
> > ==> target_core_mib.patch <==
> > [RFC PATCH 7/19] Target_Core_Mod SCSI MIBs
> > ==> target_core_plugin.patch <==
> > [RFC PATCH 8/19] Target_Core_Mod Subsystem and SE Object plugin infrastructure
> > ==> target_core_pr.patch <==
> > [RFC PATCH 9/19] Target_Core_Mod SPC-4 Persistent Reservations
> > ==> target_core_pscsi.patch <==
> > [RFC PATCH 10/19] Target_Core_Mod PSCSI <-> Linux/SCSI subsystem plugin
> > ==> target_core_rd.patch <==
> > [RFC PATCH 11/19] Target_Core_Mod RAMDISK_DR and RAMDISK_MCP subsystem plugin
> > ==> target_core_scdb.patch <==
> > [RFC PATCH 12/19] Target_Core_Mod READ/WRITE command descriptor block generation code
> > ==> target_core_seobj.patch <==
> > [RFC PATCH 13/19] Target_Core_Mod Storage Engine Object infrastructure
> > ==> target_core_tmr.patch <==
> > [RFC PATCH 14/19] Target_Core_Mod Task Management infrastructure
> > ==> target_core_tpg.patch <==
> > [RFC PATCH 15/19] Target_Core_Mod portal group endpoint infrastructure
> > ==> target_core_transport.patch <==
> > [RFC PATCH 16/19] Target_Core_Mod Generic Transport Core
> > ==> target_core_ua.patch <==
> > [RFC PATCH 17/19] Target_Core_Mod Unit Attention emulation support
> > ==> target_core_base_includes.patch <==
> > [RFC PATCH 18/19] Target_Core_Mod base and fabric_module includes
> > ==> target_core_misc.patch <==
> > [RFC PATCH 19/19] Target_Core_Mod Makefile/Kconfig and div64.c
> > 
> 
> I would like to see a documentation patch which adds a file under Documentation/
> With some abstraction, design, usability, URLs
> 
> I promise to read it ;-)
> 
> I'm sure you have lots of stuff written laying around. Could you edit them up for
> Linux?

Understood, I will put together something for Documentation/ and include
it in the next round of patches.

Many thanks for your most valuable of time,

--nab

> 
> Boaz


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