From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from aserp1040.oracle.com ([141.146.126.69]:34310 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965235AbaDJDtl (ORCPT ); Wed, 9 Apr 2014 23:49:41 -0400 From: Liu Bo To: linux-btrfs@vger.kernel.org Cc: Marcel Ritter , Christian Robert , , Konstantinos Skarlatos , David Sterba , Martin Steigerwald , Josef Bacik , Chris Mason Subject: [PATCH v10 07/16] Btrfs: skip dedup reference during backref walking Date: Thu, 10 Apr 2014 11:48:37 +0800 Message-Id: <1397101727-20806-8-git-send-email-bo.li.liu@oracle.com> In-Reply-To: <1397101727-20806-1-git-send-email-bo.li.liu@oracle.com> References: <1397101727-20806-1-git-send-email-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: The dedup ref is quite a special one, it is just used to store the hash value of the extent and cannot be used to find data, so we skip it during backref walking. Signed-off-by: Liu Bo --- fs/btrfs/backref.c | 9 +++++++++ fs/btrfs/relocation.c | 3 +++ 2 files changed, 12 insertions(+) diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index aad7201..5e57949 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -623,6 +623,9 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head *head, u64 seq, key.objectid = ref->objectid; key.type = BTRFS_EXTENT_DATA_KEY; key.offset = ref->offset; + if (ref->root == BTRFS_DEDUP_TREE_OBJECTID) + break; + ret = __add_prelim_ref(prefs, ref->root, &key, 0, 0, node->bytenr, node->ref_mod * sgn, GFP_ATOMIC); @@ -743,6 +746,9 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info, key.type = BTRFS_EXTENT_DATA_KEY; key.offset = btrfs_extent_data_ref_offset(leaf, dref); root = btrfs_extent_data_ref_root(leaf, dref); + if (root == BTRFS_DEDUP_TREE_OBJECTID) + break; + ret = __add_prelim_ref(prefs, root, &key, 0, 0, bytenr, count, GFP_NOFS); break; @@ -826,6 +832,9 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info, key.type = BTRFS_EXTENT_DATA_KEY; key.offset = btrfs_extent_data_ref_offset(leaf, dref); root = btrfs_extent_data_ref_root(leaf, dref); + if (root == BTRFS_DEDUP_TREE_OBJECTID) + break; + ret = __add_prelim_ref(prefs, root, &key, 0, 0, bytenr, count, GFP_NOFS); break; diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index def428a..8431294 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3508,6 +3508,9 @@ static int find_data_references(struct reloc_control *rc, ref_offset = btrfs_extent_data_ref_offset(leaf, ref); ref_count = btrfs_extent_data_ref_count(leaf, ref); + if (ref_root == BTRFS_DEDUP_TREE_OBJECTID) + return 0; + /* * This is an extent belonging to the free space cache, lets just delete * it and redo the search. -- 1.8.1.4