From: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
Introduce inode_need_dedup() to implement per-file online dedup control.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx>
---
fs/btrfs/inode.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1e27a71..1973f86 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -676,6 +676,18 @@ static void free_async_extent_pages(struct async_extent *async_extent)
async_extent->pages = NULL;
}
+static inline int inode_need_dedup(struct btrfs_dedup_info *dedup_info,
+ struct inode *inode)
+{
+ if (!dedup_info)
+ return 0;
+
+ if (BTRFS_I(inode)->flags & BTRFS_INODE_NODEDUP)
+ 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
@@ -1634,7 +1646,8 @@ 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) && !dedup_info) {
+ } else if (!inode_need_compress(inode) &&
+ !inode_need_dedup(dedup_info, inode)) {
ret = cow_file_range(inode, locked_page, start, end,
page_started, nr_written, 1, NULL);
} else {
--
2.7.0
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