"Stale NFS file handle" for NFS exported UFS from r252435
Claude Buisson
clbuisson at orange.fr
Wed Jul 10 12:32:26 UTC 2013
Hi,
Upgrading a CURRENT amd64 pure UFS system (watson) from r249744 to r253007, I
have hit the following:
claude at zorglub$ mount_nfs watson:/home /mnt
claude at zorglub$ /bin/ls /mnt/
claude doc.old ports.old sysref
distfiles obj portsperso xorg-dev
doc ports src xtrafiles
claude at zorglub$ /bin/ls /mnt/claude
ls: /mnt/claude: Stale NFS file handle
claude at zorglub$ /bin/ls /mnt/ports.old
CHANGES UPDATING dns multimedia textproc
COPYRIGHT accessibility editors net www
...
some directories may be listed, for the others the result is "Stale NFS file handle"
This exists for a 8.4-STABLE client system, for a 9.1-STABLE client system, and
also with a local mount (localhost) on the server system itself.
I checked with memsticks of official snapshots (to eliminate the influence of
local patches and customized kernels), with the result:
FreeBSD-10.0-CURRENT-amd64-20130630-r252387-memstick is not affected
FreeBSD-10.0-CURRENT-amd64-20130707-r252887-memstick is affected
Doing a binary search on the kernel source (without any patch) lead to the
"culprit":
----------------------------------------------------------------------
Author: pfg
Date: Mon Jul 1 03:00:15 2013
New Revision: 252435
URL: http://svnweb.freebsd.org/changeset/base/252435
Log:
Change i_gen in UFS to an unsigned type.
In UFS, i_gen is a random generated value and there is not way for
it to be negative. Actually, the value of i_gen is just used to
match bit patterns and it is of not consequence if the values are
signed or not.
Following other filesystems, set it to unsigned and use it as such,
Discussed by: mckusick
Reviewed by: mckusick (previous version)
MFC after: 4 weeks
Modified:
head/sys/ufs/ffs/ffs_vfsops.c
head/sys/ufs/ufs/dinode.h
head/sys/ufs/ufs/inode.h
head/sys/ufs/ufs/ufs_extattr.c
----------------------------------------------------------------------
which is entirely UFS (not NFS) related.
CCing pfg@ as the committer, and rmacklem@ just in case..
Thanks for your attention
Claude Buisson
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