Date: Sat, 4 Sep 2021 15:08:59 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: should copy_file_range(2) have a non-Linux flag? Message-ID: <YQXPR0101MB0968623581E772150D24F337DDD09@YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM>
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Hi,=0A= =0A= I just proposed a patch for VOP_COPY_FILE_RANGE(9)=0A= that adds a kernel only flag to specify "return after 1second=0A= with a partial copy". I'd like to use it for the NFSv4.2 server,=0A= so that the RPC replies in a reasonable time frame.=0A= https://reviews.freebsd.org/D31829=0A= =0A= The question that came up is...=0A= "should this flag be visible to userland?"=0A= =0A= The only argument I can think of against doing this is=0A= that it makes the syscall non-Linux compatible.=0A= (Also, the NFS server requirement seems a bit of an oddball=0A= and I'm not sure an application would want this capability?)=0A= =0A= Do you think this flag should be exposed to userland (ie the syscall)?=0A= =0A= rick=0A=
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