[v9,13/19] btrfs: dedupe: add per-file online dedupe control
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Message ID 1459324574-28063-14-git-send-email-quwenruo@cn.fujitsu.com
State New
Headers show

Commit Message

Qu Wenruo March 30, 2016, 7:56 a.m. UTC
From: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>

Introduce inode_need_dedupe() to implement per-file online dedupe control.

Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
---
 fs/btrfs/inode.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

Patch
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diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 96790d0..c80fd74 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -708,6 +708,18 @@  static void end_dedupe_extent(struct inode *inode, u64 start,
 	}
 }
 
+static inline int inode_need_dedupe(struct btrfs_fs_info *fs_info,
+				    struct inode *inode)
+{
+	if (!fs_info->dedupe_enabled)
+		return 0;
+
+	if (BTRFS_I(inode)->flags & BTRFS_INODE_NODEDUPE)
+		return 0;
+
+	return 1;
+}
+
 /*
  * phase two of compressed writeback.  This is the ordered portion
  * of the code, which only gets called in the order the work was
@@ -1680,7 +1692,8 @@  static int run_delalloc_range(struct inode *inode, struct page *locked_page,
 	} else if (BTRFS_I(inode)->flags & BTRFS_INODE_PREALLOC && !force_cow) {
 		ret = run_delalloc_nocow(inode, locked_page, start, end,
 					 page_started, 0, nr_written);
-	} else if (!inode_need_compress(inode) && !fs_info->dedupe_enabled) {
+	} else if (!inode_need_compress(inode) &&
+		   !inode_need_dedupe(fs_info, inode)) {
 		ret = cow_file_range(inode, locked_page, start, end,
 				      page_started, nr_written, 1, NULL);
 	} else {