Hi,
Our CIFS server problems seem to have no end… The Novell CIFS server does not
support server inode numbers (when I try the mount option I get the message it
is being turned off as server does not support it) and thus each inode gets a
different number each time it is accessed and it gets a different number again
for each readdir call.
The fun happens with rename() when the rename source and target only differ in
case, e.g.
touch foo
mv foo Foo
The result? Because of the difference in inode numbers, the request gets
through to the CIFS module which promptly does:
cifs_unlink(target_dir, target_dentry)
rc = cifs_do_rename(…)
And because the cifs_unlink() just removed the source of the rename (as it is
the same as the target), "rc" comes back as -ENOENT.
And indeed the file is gone so we just lost the user's file for ever. )-:
We are tossing around ideas how to fix this but we would be interested in your
input as to what you think the fix should be.
In any case this probably should be fixed in the standard kernel CIFS module,
too, and not just for us locally as this presumably affects anyone who is using
the CIFS module against case-insensitive, non-server-inode-number-supporting
CIFS servers...
Best regards,
Anton
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/
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