From patchwork Tue Nov 6 16:38:31 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Behrens X-Patchwork-Id: 1705601 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 752EC3FCDE for ; Tue, 6 Nov 2012 16:39:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751637Ab2KFQjC (ORCPT ); Tue, 6 Nov 2012 11:39:02 -0500 Received: from xp-ob.rzone.de ([81.169.146.140]:21803 "EHLO xp-ob.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752696Ab2KFQit (ORCPT ); Tue, 6 Nov 2012 11:38:49 -0500 X-RZG-CLASS-ID: xp Received: from pizpot.store ([192.168.43.236]) by joses.store (joses xp2) (RZmta 30.22 OK) with ESMTP id g022fdoA6Asgwy for ; Tue, 6 Nov 2012 17:38:45 +0100 (CET) From: Stefan Behrens To: linux-btrfs@vger.kernel.org Subject: [PATCH 13/26] Btrfs: enhance btrfs structures for device replace support Date: Tue, 6 Nov 2012 17:38:31 +0100 Message-Id: X-Mailer: git-send-email 1.8.0 In-Reply-To: References: In-Reply-To: References: Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Signed-off-by: Stefan Behrens --- fs/btrfs/ctree.h | 39 +++++++++++++++++++++++++++++++++++++++ fs/btrfs/disk-io.c | 5 +++++ 2 files changed, 44 insertions(+) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index ef83538..57961f1 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -885,6 +885,42 @@ struct btrfs_dev_stats_item { __le64 values[BTRFS_DEV_STAT_VALUES_MAX]; } __attribute__ ((__packed__)); +#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0 +#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1 +#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0 +#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1 +#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2 +#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3 +#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4 + +struct btrfs_dev_replace { + u64 replace_state; /* see #define above */ + u64 time_started; /* seconds since 1-Jan-1970 */ + u64 time_stopped; /* seconds since 1-Jan-1970 */ + atomic64_t num_write_errors; + atomic64_t num_uncorrectable_read_errors; + + u64 cursor_left; + u64 committed_cursor_left; + u64 cursor_left_last_write_of_item; + u64 cursor_right; + + u64 cont_reading_from_srcdev_mode; /* see #define above */ + + int is_valid; + int item_needs_writeback; + struct btrfs_device *srcdev; + struct btrfs_device *tgtdev; + + pid_t lock_owner; + atomic_t nesting_level; + struct mutex lock_finishing_cancel_unmount; + struct mutex lock_management_lock; + struct mutex lock; + + struct btrfs_scrub_progress scrub_progress; +}; + /* different types of block groups (and chunks) */ #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0) #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1) @@ -1471,6 +1507,9 @@ struct btrfs_fs_info { int backup_root_index; int num_tolerated_disk_barrier_failures; + + /* device replace state */ + struct btrfs_dev_replace dev_replace; }; /* diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 53ab3cd..bdf6345 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2131,6 +2131,11 @@ int open_ctree(struct super_block *sb, init_rwsem(&fs_info->extent_commit_sem); init_rwsem(&fs_info->cleanup_work_sem); init_rwsem(&fs_info->subvol_sem); + fs_info->dev_replace.lock_owner = 0; + atomic_set(&fs_info->dev_replace.nesting_level, 0); + mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); + mutex_init(&fs_info->dev_replace.lock_management_lock); + mutex_init(&fs_info->dev_replace.lock); spin_lock_init(&fs_info->qgroup_lock); fs_info->qgroup_tree = RB_ROOT;