From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:50838 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751289Ab3C0KHX (ORCPT ); Wed, 27 Mar 2013 06:07:23 -0400 From: Anand Jain To: linux-btrfs@vger.kernel.org Cc: sandeen@redhat.com, dsterba@suse.cz Subject: [PATCH 0/5 v5] access to backup-sb and btrfs' multipath aware Date: Wed, 27 Mar 2013 18:07:31 +0800 Message-Id: <1364378856-21053-1-git-send-email-anand.jain@oracle.com> In-Reply-To: <1362132800-29563-1-git-send-email-anand.jain@oracle.com> References: <1362132800-29563-1-git-send-email-anand.jain@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: We need a mechanism to tell when to use the backup super_block. To do this it needs a frame-work, and the patch #2 and #3 below provides the same without change in the logic. Its been found and posted to the list that check_mounted needs access to the backup-sb. so patch #3 adds flags parameter to the function btrfs_scan_one_device so that _only_ check_mounted can set the flag to access the backup-sb. patch#4 below is to enable and disable acecss to backup-sb for only certain threads v4->v5: Rebase with integration-20130321 and with my own changes (patch #1) Allow check_mounted thread-path to use backup-sb v3->v4: Fixed some warnings introduced by patch #3 below, sorry my mistake. v2->v3: Accepts David and Eric review, which would result in disabled access to backup-superblock by default. Dropped the patch [PATCH 3/3] btrfs-progs: use BTRFS_SCAN_BACKUP_SB flag in btrfs_scan_one_device Introduced a new patch [PATCH 3/3] btrfs-progs: disable using backup superblock by default v1->v2: Accepts Eric and Zach review. Separates fix into 3 patches for easy logical understanding Anand Jain (5): btrfs-progs: make btrfs dev scan multi path aware btrfs-progs: Introduce flag BTRFS_SCAN_REGISTER to replace run_ioctl btrfs-progs: Introduce flag BTRFS_SCAN_BACKUP_SB for btrfs_read_dev_super btrfs-progs: introduce passing flags to btrfs_scan_one_device btrfs-progs: disable using backup superblock by default cmds-device.c | 57 +++++++++++++++++++++++++++++++++++++++++---------------- cmds-replace.c | 2 +- disk-io.c | 15 ++++++++++----- disk-io.h | 3 ++- find-root.c | 9 ++++++--- utils.c | 57 +++++++++++++++++++++++++++++++++++++++------------------ utils.h | 8 +++++--- volumes.c | 6 ++++-- volumes.h | 2 +- 9 files changed, 109 insertions(+), 50 deletions(-) -- 1.8.1.227.g44fe835