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 <stable@xxxxxxxxxxxxxxx> know about it.
>From b88fa69eaa8649f11828158c7b65c4bcd886ebd5 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfs/pnfs.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -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 trond.myklebust@xxxxxxxxxxxxxxx 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
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