Patch "pNFS: The client must not do I/O to the DS if it's lease has expired" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

pNFS: The client must not do I/O to the DS if it's lease has expired

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
pnfs-the-client-must-not-do-i-o-to-the-ds-if-it-s-lease-has-expired.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Trond Myklebust <[email protected]>
Date: Tue, 23 Aug 2016 11:19:33 -0400
Subject: pNFS: The client must not do I/O to the DS if it's lease has expired

From: Trond Myklebust <[email protected]>

commit b88fa69eaa8649f11828158c7b65c4bcd886ebd5 upstream.

Ensure that the client conforms to the normative behaviour described in RFC5661 Section 12.7.2: "If a client believes its lease has expired, it MUST NOT send I/O to the storage device until it has validated its lease."

So ensure that we wait for the lease to be validated before using the layout.

---
 fs/nfs/pnfs.c |    1 +
 1 file changed, 1 insertion(+)

@@ -1530,6 +1530,7 @@ pnfs_update_layout(struct inode *ino,
 		goto out;
 
 lookup_again:
+	nfs4_client_recover_expired_lease(clp);
 	first = false;
 	spin_lock(&ino->i_lock);
 	lo = pnfs_find_alloc_layout(ino, ctx, gfp_flags);

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/nfsv4.1-fix-oopsable-condition-in-server-callback-races.patch queue-4.4/pnfs-ensure-layoutget-and-layoutreturn-are-properly-serialised.patch queue-4.4/nfsv4.x-fix-a-refcount-leak-in-nfs_callback_up_net.patch queue-4.4/nfsv4.1-fix-the-create_session-slot-number-accounting.patch queue-4.4/pnfs-the-client-must-not-do-i-o-to-the-ds-if-it-s-lease-has-expired.patch