Date: Fri, 27 Nov 2009 12:55:34 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: Marcin Bujak <marcin.bujak@openetworks.pl> Cc: freebsd-current@freebsd.org Subject: Re: zfs parent/child nfs share problem Message-ID: <Pine.GSO.4.63.0911271247020.7674@muncher.cs.uoguelph.ca> In-Reply-To: <E91DA1E8-1E79-4339-B6D4-BAB5276D5EB3@openetworks.pl> References: <E91DA1E8-1E79-4339-B6D4-BAB5276D5EB3@openetworks.pl>
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On Fri, 27 Nov 2009, Marcin Bujak wrote: > Hi > How can I properly share ZFS trough NFS with a child ZFS filesystems mounted > in ? [stuff snipped] > so, the file has been created in the parent filesystem instead of in the > mounted child > when I use mount server1:something/test1 /something then it works properly > zfs sharenfs=off something/test1 doesn't help > > is it possible to share a whole zfs structure in a one single parent share ? > Only if you want to live on the bleeding edge and use NFSv4, via the experimental server/client. NFSv2 and v3 does not allow servers to cross mount pt/volume boundaries, so each has to be exported and mounted separately. (fyi, even the Solaris10 NFSv4 client gets confused by crossing of mount point boundaries and won't work. I believe the Linux client, experimental FreeBSD8 client and maybe OpenSolaris can handle it.) If you choose this route, you'll want the patches in r199616 and r199715 that are in FreeBSD-current and will be MFC'd to stable/8 in a week or so. (If you go to http://svn.freebsd.org/viewvc/base/head/sys/fs/nfsserver, then look at nfs_nfsdserv.c and nfs_nfsdport.c, you should be able to find them. I think I'll try and put them somewhere easy to grab.) You'll also probably want to: sysctl vfs.newnfs.enable_locallocks=0 since the local locks acquired by the experimental server for NFSv4 is currently broken. rick
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