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  1. 03 5月, 2010 1 次提交
  3. 23 4月, 2010 1 次提交
  5. 22 4月, 2010 5 次提交
    • J
      nfsd4: complete enforcement of 4.1 op ordering · 57716355
      由 J. Bruce Fields 提交于 
      Enforce the rules about compound op ordering.

Motivated by implementing RECLAIM_COMPLETE, for which the client is
implicit in the current session, so it is important to ensure a
succesful SEQUENCE proceeds the RECLAIM_COMPLETE.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      57716355
    • J
      nfsd4: allow 4.0 clients to change callback path · 4b21d0de
      由 J. Bruce Fields 提交于 
      The rfc allows a client to change the callback parameters, but we didn't
previously implement it.

Teach the callbacks to rerun themselves (by placing themselves on a
workqueue) when they recognize that their rpc task has been killed and
that the callback connection has changed.

Then we can change the callback connection by setting up a new rpc
client, modifying the nfs4 client to point at it, waiting for any work
in progress to complete, and then shutting down the old client.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      4b21d0de
    • J
      nfsd4: rearrange cb data structures · 2bf23875
      由 J. Bruce Fields 提交于 
      Mainly I just want to separate the arguments used for setting up the tcp
client from the rest.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      2bf23875
    • J
      nfsd4: cl_count is unused · b12a05cb
      由 J. Bruce Fields 提交于 
      Now that the shutdown sequence guarantees callbacks are shut down before
the client is destroyed, we no longer have a use for cl_count.

We'll probably reinstate a reference count on the client some day, but
it will be held by users other than callbacks.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      b12a05cb
    • J
      nfsd4: don't sleep in lease-break callback · b5a1a81e
      由 J. Bruce Fields 提交于 
      The NFSv4 server's fl_break callback can sleep (dropping the BKL), in
order to allocate a new rpc task to send a recall to the client.

As far as I can tell this doesn't cause any races in the current code,
but the analysis is difficult.  Also, the sleep here may complicate the
move away from the BKL.

So, just schedule some work to do the job for us instead.  The work will
later also prove useful for restarting a call after the callback
information is changed.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      b5a1a81e
  7. 20 4月, 2010 1 次提交
  9. 17 4月, 2010 1 次提交
  11. 03 4月, 2010 4 次提交
  13. 23 3月, 2010 1 次提交
    • J
      nfsd: don't break lease while servicing a COMMIT · 91885258
      由 Jeff Layton 提交于 
      This is the second attempt to fix the problem whereby a COMMIT call
causes a lease break and triggers a possible deadlock.

The problem is that nfsd attempts to break a lease on a COMMIT call.
This triggers a delegation recall if the lease is held for a delegation.
If the client is the one holding the delegation and it's the same one on
which it's issuing the COMMIT, then it can't return that delegation
until the COMMIT is complete. But, nfsd won't complete the COMMIT until
the delegation is returned. The client and server are essentially
deadlocked until the state is marked bad (due to the client not
responding on the callback channel).

The first patch attempted to deal with this by eliminating the open of
the file altogether and simply had nfsd_commit pass a NULL file pointer
to the vfs_fsync_range. That would conflict with some work in progress
by Christoph Hellwig to clean up the fsync interface, so this patch
takes a different approach.

This declares a new NFSD_MAY_NOT_BREAK_LEASE access flag that indicates
to nfsd_open that it should not break any leases when opening the file,
and has nfsd_commit set that flag on the nfsd_open call.

For now, this patch leaves nfsd_commit opening the file with write
access since I'm not clear on what sort of access would be more
appropriate.
Signed-off-by: NJeff Layton <jlayton@redhat.com>
Cc: stable@kernel.org
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      91885258
  15. 17 3月, 2010 1 次提交
  17. 08 3月, 2010 15 次提交
  19. 07 3月, 2010 10 次提交