[PATCH v6 18/19] btrfs: dedup: add per-file online dedup control
From: Qu Wenruo <hidden>
Date: 2016-02-05 01:25:00
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
From: Wang Xiaoguang <redacted> Introduce inode_need_dedup() to implement per-file online dedup control. Signed-off-by: Wang Xiaoguang <redacted> --- 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 759b03d..25af469 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_fs_info *fs_info, + struct inode *inode) +{ + if (!fs_info->dedup_enabled) + 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
@@ -1637,7 +1649,8 @@ 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->dedup_enabled) { + } else if (!inode_need_compress(inode) && + !inode_need_dedup(fs_info, inode)) { ret = cow_file_range(inode, locked_page, start, end, page_started, nr_written, 1, NULL); } else {
--
2.7.0