| Message ID | 20190417012715.8287-2-ruansy.fnst@cn.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [RFC,1/4] fs/iomap: Introduce src_addr for COW in fsdax mode. | expand |
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 0fefb5455bda..3b3aec2311c5 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -61,6 +61,10 @@ struct iomap { u16 flags; /* flags for mapping */ struct block_device *bdev; /* block device for I/O */ struct dax_device *dax_dev; /* dax_dev for dax operations */ + u64 src_addr; /* disk offset of mapping, bytes, + * the source blocks' start address + * for cow in dax + */ void *inline_data; void *private; /* filesystem private */
When using reflink, coping the source blocks before writing data into new allocated blocks is required. In fsdax mode, we need a source blocks' start address to handle the COW operation. Signed-off-by: Shiyang Ruan <ruansy.fnst@cn.fujitsu.com> --- include/linux/iomap.h | 4 ++++ 1 file changed, 4 insertions(+)