linux-kernel - Re: [RFC v2 05/21] tcm: Add ConfigFS subsystem backstore infrastructure

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Message-Id: <20101006091219Q.fujita.tomonori@lab.ntt.co.jp>
Date:	Wed, 6 Oct 2010 09:17:12 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	nab@...ux-iscsi.org
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	fujita.tomonori@....ntt.co.jp, michaelc@...wisc.edu, hch@....de,
	hare@...e.de, James.Bottomley@...e.de, axboe@...nel.dk,
	bharrosh@...asas.com
Subject: Re: [RFC v2 05/21] tcm: Add ConfigFS subsystem backstore
 infrastructure

On Wed, 22 Sep 2010 15:49:10 -0700
"Nicholas A. Bellinger" <nab@...ux-iscsi.org> wrote:

> From: Nicholas Bellinger <nab@...ux-iscsi.org>
> 
> This patch adds the TCM/ConfigFS core HBA and device backstore infrastructre
> objects in /sys/kernel/config/target/core.  It includes wrappers to logic for
> Persistent Reservations and ALUA, and supports Linux/SCSI, Linux/BLOCK, and Linux/FILEIO
> backstores using TCM subsystem plugin API.
> 
> Signed-off-by: Nicholas A. Bellinger <nab@...ux-iscsi.org>
> ---
>  drivers/target/target_core_configfs.c | 3334 +++++++++++++++++++++++++++++++++
>  include/target/target_core_configfs.h |   57 +
>  2 files changed, 3391 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/target/target_core_configfs.c
>  create mode 100644 include/target/target_core_configfs.h

Can a driver create a directory/file under configfs?

ibmvscsi target driver gets the list of targets to set up from
hardware (see how drivers/scsi/ibmvscsi/ibmvstgt.c use
vio_register_driver). The driver needs to tell an user about it so
that he can set up luns, etc via configfs.
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