summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/dedupe.h
diff options
context:
space:
mode:
authorWang Xiaoguang <wangxg.fnst@cn.fujitsu.com>2016-07-11 11:05:29 +0800
committerDavid Sterba <dsterba@suse.com>2016-07-26 13:52:25 +0200
commitdda3245eca18c73413a854a834c41fc770feb0dd (patch)
tree9004d9180ec0c8542257ae5859b6b1f51ff15fac /fs/btrfs/dedupe.h
parentf5daf2c780f2ddfddbf98f2eb668f026c4dd2e5d (diff)
downloadlinux-dda3245eca18c73413a854a834c41fc770feb0dd.tar.gz
linux-dda3245eca18c73413a854a834c41fc770feb0dd.tar.bz2
linux-dda3245eca18c73413a854a834c41fc770feb0dd.zip
btrfs: expand cow_file_range() to support in-band dedup and subpage-blocksize
Extract cow_file_range() new parameters for both in-band dedupe and subpage sector size patchset. This should make conflict of both patchset to minimal, and reduce the effort needed to rebase them. Cc: Chandan Rajendra <chandan@linux.vnet.ibm.com> Cc: David Sterba <dsterba@suse.cz> Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com> Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/dedupe.h')
-rw-r--r--fs/btrfs/dedupe.h24
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/btrfs/dedupe.h b/fs/btrfs/dedupe.h
new file mode 100644
index 000000000000..83ebfe28da9e
--- /dev/null
+++ b/fs/btrfs/dedupe.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2016 Fujitsu. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License v2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef __BTRFS_DEDUPE__
+#define __BTRFS_DEDUPE__
+
+/* later in-band dedupe will expand this struct */
+struct btrfs_dedupe_hash;
+#endif