From patchwork Sun Apr 10 21:06:11 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hugo Mills X-Patchwork-Id: 697081 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p3AL6RwP018769 for ; Sun, 10 Apr 2011 21:06:50 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757973Ab1DJVG0 (ORCPT ); Sun, 10 Apr 2011 17:06:26 -0400 Received: from frost.carfax.org.uk ([212.13.194.111]:2240 "EHLO frost.carfax.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757627Ab1DJVGW (ORCPT ); Sun, 10 Apr 2011 17:06:22 -0400 Received: from ruthven.carfax.org.uk ([10.0.0.10]) by frost.carfax.org.uk with esmtp (Exim 4.69) (envelope-from ) id 1Q91pl-00058J-6n; Sun, 10 Apr 2011 21:06:13 +0000 Received: from [10.0.0.10] (helo=ruthven.carfax.org.uk) by ruthven.carfax.org.uk with esmtp (Exim 4.72) (envelope-from ) id 1Q91pk-0003Hx-U9; Sun, 10 Apr 2011 22:06:13 +0100 From: Hugo Mills To: chris.mason@oracle.com, dave@jikos.cz, lizf@cn.fujitsu.com Cc: linux-btrfs@vger.kernel.org Subject: [PATCH v5 8/8] btrfs: Balance filter for physical device address Date: Sun, 10 Apr 2011 22:06:11 +0100 Message-Id: <1302469571-12605-9-git-send-email-hugo@carfax.org.uk> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1302469571-12605-1-git-send-email-hugo@carfax.org.uk> References: <1302469571-12605-1-git-send-email-hugo@carfax.org.uk> X-frost.carfax.org.uk-Spam-Score: -0.0 (/) X-frost.carfax.org.uk-Spam-Report: Spam detection software, running on the system "spamd2.lon.bitfolk.com", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Add a filter for balancing which allows the selection of chunks with data in the given byte range on any block device in the filesystem. On its own, this filter is of little use, but when used with the devid filter, it can be used to rebalance all chunks which lie on a part of a specific device. [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sun, 10 Apr 2011 21:06:50 +0000 (UTC) Add a filter for balancing which allows the selection of chunks with data in the given byte range on any block device in the filesystem. On its own, this filter is of little use, but when used with the devid filter, it can be used to rebalance all chunks which lie on a part of a specific device. Signed-off-by: Hugo Mills --- fs/btrfs/ioctl.h | 9 +++++++-- fs/btrfs/volumes.c | 19 +++++++++++++++++++ 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 50d4801..a037714 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -168,7 +168,8 @@ struct btrfs_ioctl_balance_progress { #define BTRFS_BALANCE_FILTER_CHUNK_TYPE (1 << 1) #define BTRFS_BALANCE_FILTER_DEVID (1 << 2) #define BTRFS_BALANCE_FILTER_VIRTUAL_ADDRESS_RANGE (1 << 3) -#define BTRFS_BALANCE_FILTER_MASK ((1 << 4) - 1) /* Logical or of all filter +#define BTRFS_BALANCE_FILTER_DEVICE_ADDRESS_RANGE (1 << 4) +#define BTRFS_BALANCE_FILTER_MASK ((1 << 5) - 1) /* Logical or of all filter * flags -- effectively versions * the filtered balance ioctl */ @@ -192,7 +193,11 @@ struct btrfs_ioctl_balance_start { __u64 vrange_start; __u64 vrange_end; - __u64 spare[503]; /* Make up the size of the structure to 4088 + /* For FILTER_DEVICE_ADDRESS_RANGE */ + __u64 drange_start; + __u64 drange_end; + + __u64 spare[501]; /* Make up the size of the structure to 4088 * bytes for future expansion */ }; diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 9216ad85..19dc117 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2124,6 +2124,25 @@ int balance_chunk_filter(struct btrfs_ioctl_balance_start *filter, if (filter->vrange_start >= end || start >= filter->vrange_end) return 0; } + if (filter->flags & BTRFS_BALANCE_FILTER_DEVICE_ADDRESS_RANGE) { + int num_stripes = btrfs_chunk_num_stripes(eb, chunk); + int stripe_length = btrfs_chunk_length(eb, chunk) + * num_stripes / replinfo.num_copies; + int res = 0; + + for (i = 0; i < num_stripes; i++) { + struct btrfs_stripe *stripe = btrfs_stripe_nr(chunk, i); + u64 start = btrfs_stripe_offset(eb, stripe); + u64 end = start + stripe_length; + if (filter->drange_start < end + && start < filter->drange_end) { + res = 1; + break; + } + } + if (!res) + return 0; + } return 1; }