Date: Tue, 15 Jan 2013 22:10:35 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: Sergey Kandaurov <pluknet@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: getcwd lies on/under nfs4-mounted zfs dataset Message-ID: <980540815.2029630.1358305835362.JavaMail.root@erie.cs.uoguelph.ca> In-Reply-To: <CAE-mSOJk1HbxvF=ZpoSP21b9j65qMov=AE-OM6wcUkbadQeZbw@mail.gmail.com>
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------=_Part_2029629_336101775.1358305835359 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit pluknet@gmail.com wrote: > Hi. > > We stuck with the problem getting wrong current directory path > when sitting on/under zfs dataset filesystem mounted over NFSv4. > Both nfs server and client are 10.0-CURRENT from December or so. > > The component path "user3" unexpectedly appears to be "." (dot). > nfs-client:/home/user3 # pwd > /home/. > nfs-client:/home/user3/var/run # pwd > /home/./var/run > Yep, it was broken for UFS too. I think the attached patch for the client might fix it. (It fixes a trivial test case for UFS, but I haven't gone through the code to check if it might break something else.) I vaguely recall bumping into a non-FreeBSD server that only returned the Mounted_on_fileno attribute for mount points at a testing bakeathon and hacking around the problem that caused. (I think that hack made it into head, oops.;-) So, I wouldn't test this patch for a production type system, but if you can test it, that would be great. Sorry about the breakage, rick > nfs-client:~ # procstat -f 3225 > PID COMM FD T V FLAGS REF OFFSET PRO NAME > 3225 a.out text v r r-------- - - - /home/./var/a.out > 3225 a.out ctty v c rw------- - - - /dev/pts/2 > 3225 a.out cwd v d r-------- - - - /home/./var > 3225 a.out root v d r-------- - - - / > > The used setup follows. > > 1. NFS Server with local ZFS: > # cat /etc/exports > V4: / -sec=sys > > # zfs list > pool1 10.4M 122G 580K /pool1 > pool1/user3 on /pool1/user3 (zfs, NFS exported, local, nfsv4acls) > > Exports list on localhost: > /pool1/user3 109.70.28.0 > /pool1 109.70.28.0 > > # zfs get sharenfs pool1/user3 > NAME PROPERTY VALUE SOURCE > pool1/user3 sharenfs -alldirs -maproot=root -network=109.70.28.0/24 > local > > 2. pool1 is mounted on NFSv4 client: > nfs-server:/pool1 on /home (nfs, noatime, nfsv4acls) > > So that on NFS client the "pool1/user3" dataset comes at /home/user3. > / - ufs > /home - zpool-over-nfsv4 > /home/user3 - zfs dataset "pool1/user3" > > At the same time it works as expected when we're not on zfs dataset, > but directly on its parent zfs pool (also over NFSv4), e.g. > nfs-client:/home/non_dataset_dir # pwd > /home/non_dataset_dir > > The ls command works as expected: > nfs-client:/# ls -dl /home/user3/var/ > drwxrwxrwt+ 6 root wheel 6 Jan 10 16:19 /home/user3/var/ > > -- > wbr, > pluknet > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" ------=_Part_2029629_336101775.1358305835359 Content-Type: text/x-patch; name=client-getcwd.patch Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename=client-getcwd.patch LS0tIGZzL25mcy9uZnNwcm90by5oLnNhdjIJMjAxMy0wMS0xNSAyMTozNDo0OS4wMDAwMDAwMDAg LTA1MDAKKysrIGZzL25mcy9uZnNwcm90by5oCTIwMTMtMDEtMTUgMjE6MzY6NTUuMDAwMDAwMDAw IC0wNTAwCkBAIC05ODQsNyArOTg0LDggQEAgc3RydWN0IG5mc3YzX3NhdHRyIHsKICAJTkZTQVRU UkJNX1NQQUNFVVNFRCB8CQkJCQkJXAogIAlORlNBVFRSQk1fVElNRUFDQ0VTUyB8CQkJCQkJXAog IAlORlNBVFRSQk1fVElNRU1FVEFEQVRBIHwJCQkJCVwKLSAJTkZTQVRUUkJNX1RJTUVNT0RJRlkp CisgCU5GU0FUVFJCTV9USU1FTU9ESUZZIHwJCQkJCQlcCisJTkZTQVRUUkJNX01PVU5URURPTkZJ TEVJRCkKIAogLyoKICAqIFN1YnNldCBvZiB0aGUgYWJvdmUgdGhhdCB0aGUgV3JpdGUgUlBDIGdl dHMuCi0tLSBmcy9uZnMvbmZzX2NvbW1vbnN1YnMuYy5zYXYyCTIwMTMtMDEtMTUgMjE6Mzg6NTMu MDAwMDAwMDAwIC0wNTAwCisrKyBmcy9uZnMvbmZzX2NvbW1vbnN1YnMuYwkyMDEzLTAxLTE1IDIx OjQwOjA0LjAwMDAwMDAwMCAtMDUwMApAQCAtMTcyNiw2ICsxNzI2LDcgQEAgbmZzdjRfbG9hZGF0 dHIoc3RydWN0IG5mc3J2X2Rlc2NyaXB0ICpuZAogCQkJICAgIGlmICgqdGwrKykKIAkJCQlwcmlu dGYoIk5GU3Y0IG1vdW50ZWQgb24gZmlsZWlkID4gMzJiaXRzXG4iKTsKIAkJCSAgICBuYXAtPm5h X21udG9uZmlsZW5vID0gdGh5cDsKKwkJCSAgICBuYXAtPm5hX2ZpbGVpZCA9IG5hcC0+bmFfbW50 b25maWxlbm87CiAJCQl9CiAJCQlhdHRyc3VtICs9IE5GU1hfSFlQRVI7CiAJCQlicmVhazsK ------=_Part_2029629_336101775.1358305835359--
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