Patch "pNFS: The client must not do I/O to the DS if it's lease has expired" has been added to the 4.7-stable tree

Patch "pNFS: The client must not do I/O to the DS if it's lease has expired" has been added to the 4.7-stable tree

[gregkh]

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 4.7-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-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b88fa69eaa8649f11828158c7b65c4bcd886ebd5 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
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 <trond.myklebust@primarydata.com>

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.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1527,6 +1527,7 @@ pnfs_update_layout(struct inode *ino,
 	}
 
 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 trond.myklebust@primarydata.com are

queue-4.7/nfsv4.1-fix-oopsable-condition-in-server-callback-races.patch
queue-4.7/pnfs-ensure-layoutget-and-layoutreturn-are-properly-serialised.patch
queue-4.7/nfsv4.x-fix-a-refcount-leak-in-nfs_callback_up_net.patch
queue-4.7/pnfs-flexfiles-fix-an-oopsable-condition-when-connection-to-the-ds-fails.patch
queue-4.7/nfsv4.1-fix-the-create_session-slot-number-accounting.patch
queue-4.7/pnfs-the-client-must-not-do-i-o-to-the-ds-if-it-s-lease-has-expired.patch