Amir Goldstein: > Factor out some common vfs bits from do_tmpfile() > to be used by overlayfs for concurrent copy up. Hmm, just to copy-up. I have no objection this factoring-out, but do you have any specific reason for overlayfs NOT to support i_op->tmpfile()? If you try supporting it in the future, then the parameter open_flag may become a problem. I guess that you will make ovl_tmpfile() (currently not exist) to call vfs_tmpfile(), and pass dummy 0 as open_flag as overlayfs copy-up does. But such dummy parameter will make the created tmpfile un-linkable by a user I am afraid. J. R. Okajima
