From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from userp1040.oracle.com ([156.151.31.81]:17606 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754346Ab3L3INY (ORCPT ); Mon, 30 Dec 2013 03:13:24 -0500 From: Liu Bo To: linux-btrfs@vger.kernel.org Cc: Marcel Ritter , Christian Robert , "alanqk@gmail.com" Subject: [PATCH v8 07/14] Btrfs: introduce dedup state Date: Mon, 30 Dec 2013 16:12:47 +0800 Message-Id: <1388391175-29539-8-git-send-email-bo.li.liu@oracle.com> In-Reply-To: <1388391175-29539-1-git-send-email-bo.li.liu@oracle.com> References: <1388391175-29539-1-git-send-email-bo.li.liu@oracle.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: This introduces dedup state and relative operations to mark and unmark the dedup data range, it'll be used in later patches. Signed-off-by: Liu Bo --- fs/btrfs/extent_io.c | 14 ++++++++++++++ fs/btrfs/extent_io.h | 5 +++++ 2 files changed, 19 insertions(+) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 8e457fc..54cef32 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1251,6 +1251,20 @@ int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, cached_state, mask); } +int set_extent_dedup(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask) +{ + return set_extent_bit(tree, start, end, EXTENT_DEDUP, 0, + cached_state, mask); +} + +int clear_extent_dedup(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask) +{ + return clear_extent_bit(tree, start, end, EXTENT_DEDUP, 0, 0, + cached_state, mask); +} + /* * either insert or lock state struct between start and end use mask to tell * us if waiting is desired. diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 19620c5..5c6a78d 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -20,6 +20,7 @@ #define EXTENT_NEED_WAIT (1 << 13) #define EXTENT_DAMAGED (1 << 14) #define EXTENT_NORESERVE (1 << 15) +#define EXTENT_DEDUP (1 << 16) #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) @@ -227,6 +228,10 @@ int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask); int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached_state, gfp_t mask); +int set_extent_dedup(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask); +int clear_extent_dedup(struct extent_io_tree *tree, u64 start, u64 end, + struct extent_state **cached_state, gfp_t mask); int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, -- 1.8.2.1