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  1. 04 5月, 2010 1 次提交
  3. 03 5月, 2010 3 次提交
    • J
      nfsd: further comment typos · fb4b698f
      由 J. Bruce Fields 提交于 
      Whoops, missed some more.

"Reviewed-by, I guess": Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      fb4b698f
    • N
      sunrpc: centralise most calls to svc_xprt_received · b48fa6b9
      由 Neil Brown 提交于 
      svc_xprt_received must be called when ->xpo_recvfrom has finished
receiving a message, so that the XPT_BUSY flag will be cleared and
if necessary, requeued for further work.

This call is currently made in each ->xpo_recvfrom function, often
from multiple different points.  In each case it is the earliest point
on a particular path where it is known that the protection provided by
XPT_BUSY is no longer needed.

However there are (still) some error paths which do not call
svc_xprt_received, and requiring each ->xpo_recvfrom to make the call
does not encourage robustness.

So: move the svc_xprt_received call to be made just after the
call to ->xpo_recvfrom(), and move it of the various ->xpo_recvfrom
methods.

This means that it may not be called at the earliest possible instant,
but this is unlikely to be a measurable performance issue.

Note that there are still other calls to svc_xprt_received as it is
also needed when an xprt is newly created.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      b48fa6b9
    • J
      nfsd4: fix unlikely race in session replay case · 26c0c75e
      由 J. Bruce Fields 提交于 
      In the replay case, the

	renew_client(session->se_client);

happens after we've droppped the sessionid_lock, and without holding a
reference on the session; so there's nothing preventing the session
being freed before we get here.

Thanks to Benny Halevy for catching a bug in an earlier version of this
patch.
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
Acked-by: NBenny Halevy <bhalevy@panasas.com>
      26c0c75e
  5. 23 4月, 2010 2 次提交
  7. 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
  9. 20 4月, 2010 1 次提交
  11. 17 4月, 2010 1 次提交
  13. 03 4月, 2010 4 次提交
  15. 30 3月, 2010 1 次提交
  17. 24 3月, 2010 1 次提交
  19. 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
  21. 17 3月, 2010 1 次提交
  23. 15 3月, 2010 3 次提交
    • N
      sunrpc: never return expired entries in sunrpc_cache_lookup · d202cce8
      由 NeilBrown 提交于 
      If sunrpc_cache_lookup finds an expired entry, remove it from
the cache and return a freshly created non-VALID entry instead.
This ensures that we only ever get a usable entry, or an
entry that will become usable once an update arrives.
i.e. we will never need to repeat the lookup.

This allows us to remove the 'is_expired' test from cache_check
(i.e. from cache_is_valid).  cache_check should never get an expired
entry as 'lookup' will never return one.  If it does happen - due to
inconvenient timing - then just accept it as still valid, it won't be
very much past it's use-by date.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      d202cce8
    • N
      sunrpc/cache: factor out cache_is_expired · 2f50d8b6
      由 NeilBrown 提交于 
      This removes a tiny bit of code duplication, but more important
prepares for following patch which will perform the expiry check in
cache_lookup and the rest of the validity check in cache_check.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      2f50d8b6
    • N
      sunrpc: don't keep expired entries in the auth caches. · 3af4974e
      由 NeilBrown 提交于 
      currently expired entries remain in the auth caches as long
as there is a reference.
This was needed long ago when the auth_domain cache used the same
cache infrastructure.  But since that (being a very different sort
of cache) was separated, this test is no longer needed.

So remove the test on refcnt and tidy up the surrounding code.

This allows the cache_dequeue call (which needed to be there to
drop a potentially awkward reference) can be moved outside of the
spinlock which is a better place for it.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>
      3af4974e
  25. 10 3月, 2010 1 次提交
  27. 09 3月, 2010 2 次提交
    • L
      Linux 2.6.34-rc1 · 57d54889
      由 Linus Torvalds 提交于
      57d54889
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6 · e1015418
      由 Linus Torvalds 提交于 
      * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (62 commits)
  msi-laptop: depends on RFKILL
  msi-laptop: Detect 3G device exists by standard ec command
  msi-laptop: Add resume method for set the SCM load again
  msi-laptop: Support some MSI 3G netbook that is need load SCM
  msi-laptop: Add threeg sysfs file for support query 3G state by standard 66/62 ec command
  msi-laptop: Support standard ec 66/62 command on MSI notebook and nebook
  Driver core: create lock/unlock functions for struct device
  sysfs: fix for thinko with sysfs_bin_attr_init()
  sysfs: Kill unused sysfs_sb variable.
  sysfs: Pass super_block to sysfs_get_inode
  driver core: Use sysfs_rename_link in device_rename
  sysfs: Implement sysfs_rename_link
  sysfs: Pack sysfs_dirent more tightly.
  sysfs: Serialize updates to the vfs inode
  sysfs: windfarm: init sysfs attributes
  sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on module dynamic attributes
  sysfs: Document sysfs_attr_init and sysfs_bin_attr_init
  sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on dynamic attributes
  sysfs: Use one lockdep class per sysfs attribute.
  sysfs: Only take active references on attributes.
  ...
      e1015418
  29. 08 3月, 2010 13 次提交