On Wed, Aug 26, 2015 at 9:11 PM, Christoph Hellwig <h...@infradead.org> wrote: > On Wed, Aug 26, 2015 at 04:16:41PM +0800, Peng Tao wrote: >> 2. vfs_file_clone_range() does not expect file systems to do data copy, and >> thus >> no rw_verify_area() required. > > While there is no physical copy involved, the data logically is copied from > file A to file B. So we still need all the checks from rw_verify_area. I see. Will add the checks.
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