From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752778AbZHaI3o (ORCPT ); Mon, 31 Aug 2009 04:29:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752726AbZHaI3l (ORCPT ); Mon, 31 Aug 2009 04:29:41 -0400 Received: from smtp105.sbc.mail.gq1.yahoo.com ([67.195.14.108]:29565 "HELO smtp105.sbc.mail.gq1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752719AbZHaI3j (ORCPT ); Mon, 31 Aug 2009 04:29:39 -0400 X-YMail-OSG: xEZJZJEVM1kWqiyRd8ZwIl7UKFYoLU1R5XkmkH45bpqYik8jfR5jud2y4OqA8BJxkYJmulrW4_PK648yRGdw2KAmSAK7URuzv2ua27A3Kdi4j7KDsVBo8bDzC30SDv1QvrSPZ2HfNZFxpgV4qv_N6HUwhMOZly4nzHcJPDRI8ckDx_oruiRcsJ1Le1UsFbMcdJlJokYs0E2Ag04pBnHpxZGmfhvhI6JFkdQBZ5Huh0G0c1ydrmm.Dz5q6uJZy9ObYF4tzNdqmmqogpz3KaN9Rw-- X-Yahoo-Newman-Property: ymail-3 Subject: [PATCH 0/4]: Add ALUA primary/secondary access state/status metadata support From: "Nicholas A. Bellinger" To: linux-scsi , LKML Cc: Douglas Gilbert , Hannes Reinecke , FUJITA Tomonori , Mike Christie , Alasdair G Kergon , James Bottomley Content-Type: text/plain Date: Mon, 31 Aug 2009 01:29:21 -0700 Message-Id: <1251707361.4136.47.camel@haakon2.linux-iscsi.org> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Greeting SCSI and multipath folks, This patch series to TCM/LIO v3.1 kernel code in lio-core-2.6.git adds support for struct file ALUA metadata of primary/secondary access state/status to /var/target/alua/, which allows the ALUA metadata to be loaded into configfs attributes at TCM + fabric bringup time to reinstate the last saved ALUA metadata across target power loss, reboots, et al. Here is what an example running layout of metadata in /var/target/alua looks like: target:/mnt/sdb/lio-core-2.6.git# tree /var/target/alua/ /var/target/alua/ |-- iSCSI # These are for fabric dependent Port/LUN ALUA secondary access metadata | |-- iqn.2003-01.org.linux-iscsi.target.i686:sn.cff3eedbd2fd+1 | | `-- lun_0 | `-- iqn.2003-01.org.linux-iscsi.target.i686:sn.e475ed6fcdd0+1 | `-- lun_0 | # These are for TCM storage object target port group ALUA primary access metadata |-- tpgs_41ee70ff-4fbe-4fb8-a690-b3c65639db10 |-- tpgs_96eb8120-f0fc-40ce-b673-8ac302aa6b4e `-- tpgs_a97e4ce21c0711de829b000c2943d57b |-- lio_alua_east `-- lio_alua_west This patch series includes new EXPORT_SYMBOL() calls to target_core_alua.c that add generic configfs store/show handlers for fabric dependent configfs attribute code, as well as the modification to LIO-Target/ConfigFS to use these generic handlers. Also, code has been added for calling filp_open() -> vfs_writev() -> flip_close() for updating the actual struct file in both primary/secondary access state transitions for both explict (via MO SET_TARGET_PORT_GROUPS) and implict (via configfs) ALUA operations. [PATCH 1/4] [Target_Core_Mod/ALUA]: Add support for saving primary port metadata across target power loss [PATCH 2/4] [Target_Core_Mod/ALUA]: Add support for saving secondary fabric port metadata across target power loss [PATCH 3/4] [Target_Core_Mod]: Add alua mutex initialization in core_alloc_port() [PATCH 4/4] [LIO-Target/ConfigFS]: Add ALUA secondary access state attributes for saving/reading metadata drivers/lio-core/iscsi_target_configfs.c | 54 +++++++ drivers/target/target_core_alua.c | 232 +++++++++++++++++++++++++++++- drivers/target/target_core_configfs.c | 75 ++++++++++- drivers/target/target_core_device.c | 1 + include/target/target_core_alua.h | 17 ++- include/target/target_core_base.h | 7 + 6 files changed, 378 insertions(+), 8 deletions(-) The userspace commits to make it all go can be found here: http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=3dbe22aa3941dbf0126490e95e50a2f536721f3e http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=494e2f6d1163227602d2336cd65d57bf2cf07e78 http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=e632383be4ac3634325551b8fbc152bb2d2f5fc2 http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=4917f200458845468db33b6abd30c1a0cc64fbba http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=c0d26101ee33aaf284b7b86391cf7c70c9859816 http://git.kernel.org/?p=linux/storage/lio/lio-utils.git;a=commitdiff;h=fa48c904073a878b36e0b92eda28faebea55aafc Any comments or questions are welcome! --nab