Date: Tue, 21 Mar 2017 10:47:57 +0200 From: Toomas Soome <tsoome@me.com> To: Baptiste Daroussin <bapt@FreeBSD.org> Cc: Daniel Braniss <danny@cs.huji.ac.il>, Rick Macklem <rmacklem@uoguelph.ca>, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: NFSv2 boot & OLD_NFSV2 Message-ID: <1CAABCFC-2385-444D-B909-F5F1C33F8A88@me.com> In-Reply-To: <20170321081339.2wbx3rb32qdavvn3@ivaldir.net> References: <38DD1950-AD12-4A27-8335-54F997E408DF@me.com> <20170320192000.6hal22ibnr3ajog3@ivaldir.net> <YTXPR01MB0189B266270E22DADF9A48EADD3A0@YTXPR01MB0189.CANPRD01.PROD.OUTLOOK.COM> <1B7471CD-2F2D-4F22-9D25-E46580CF9E96@me.com> <84D239AB-AB57-4A50-9700-E42BBF9CBE5A@cs.huji.ac.il> <20170321081339.2wbx3rb32qdavvn3@ivaldir.net>
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> On 21. m=C3=A4rts 2017, at 10:13, Baptiste Daroussin = <bapt@FreeBSD.org> wrote: >=20 > On Tue, Mar 21, 2017 at 09:58:21AM +0200, Daniel Braniss wrote: >>=20 >>> On 20 Mar 2017, at 23:55, Toomas Soome <tsoome@me.com> wrote: >>>=20 >>>>=20 >>>> On 20. m=C3=A4rts 2017, at 23:53, Rick Macklem = <rmacklem@uoguelph.ca> wrote: >>>>=20 >>>> Baptiste Daroussin wrote: >>>>> On Mon, Mar 20, 2017 at 08:22:12PM +0200, Toomas Soome wrote: >>>>>> Hi! >>>>>>=20 >>>>>> The current boot code is building NFSv3, with preprocessor = conditional OLD_NFSV2. Should NFSv2 code still be kept around or can we = burn it? >>>>>>=20 >>>>>> rgds, >>>>>> toomas >>>>>=20 >>>>> I vote burn >>>>>=20 >>>>> Bapt >>>> I would be happy to see NFSv2 go away. However, depending on how = people configure >>>> their diskless root fs, they do end up using NFSv2 for their root = fs. >>>>=20 >>>> Does booting over NFSv3 affect this? >>>>=20 >>>> I think the answer is no for a FreeBSD server (since the NFSv2 File = Handle is the same as >>>> the NFSv3 one, except padded with 0 bytes to 32bytes long). >>>> However, there might be non-FreeBSD NFS servers where the NFSv2 = file handle is different >>>> than the NFSv3 one and for that case, the user would need NFSv2 = boot code (or >>>> reconfigure their root fs to use NFSv3). >>>>=20 >>>> To be honest, I suspect few realize that they are using NFSv2 for = their root fs. >>>> (They'd see it in a packet trace or via "nfsstat -m", but otherwise = they probably >>>> think they are using NFSv3 for their root fs.) >>>>=20 >>>> rick >>>=20 >>> if they do not suspect, they most likely use v3 - due to simple fact = that you have to rebuild loader to use NFSv2 - it is compile time = option. >>>=20 >>=20 >> old systems, 8.x, still use/boot v2, and so do old linux. >> NetApp has discontinued support for v2, so we had to move this = machines to use FreeBSD server and the day was >> saved. So, till these machines get upgraded/discontinued we have a = problem. There are several solutions >> to this issue, but as long as it's a matter of getting rid for the = sake of it, I would vote to keep it a while longer. >>=20 >> danny >>=20 >>=20 > Given you are speaking of 8.x I suppose you are using the loader that = comes with > it, meaning you are safe if we remove it from the loader in 12.0 (note = as said > by Toomas that is it is already off by default in the 12.0 loader) am = I missing > something? >=20 >=20 Indeed, we definitely are *not* talking about back porting the removal, = there is no reason for that whatsoever. In fact at least 11 is = distributing loader based on NFSv3, likely even 10 (I havent checked = that). So yes, just talking about possible removal in current only. rgds, toomas
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