Patch "NFSv4: Fix client recovery when server reboots multiple times" has been added to the 4.4-stable tree

Patch "NFSv4: Fix client recovery when server reboots multiple times" has been added to the 4.4-stable tree

[gregkh]

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

    NFSv4: Fix client recovery when server reboots multiple times

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:
     nfsv4-fix-client-recovery-when-server-reboots-multiple-times.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@vger.kernel.org> know about it.


>From foo@baz Wed Dec  6 16:43:17 CET 2017
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Fri, 13 Jan 2017 13:31:32 -0500
Subject: NFSv4: Fix client recovery when server reboots multiple times

From: Trond Myklebust <trond.myklebust@primarydata.com>


[ Upstream commit c6180a6237174f481dc856ed6e890d8196b6f0fb ]

If the server reboots multiple times, the client should rely on the
server to tell it that it cannot reclaim state as per section 9.6.3.4
in RFC7530 and section 8.4.2.1 in RFC5661.
Currently, the client is being to conservative, and is assuming that
if the server reboots while state recovery is in progress, then it must
ignore state that was not recovered before the reboot.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/nfs/nfs4state.c |    1 -
 1 file changed, 1 deletion(-)

--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1680,7 +1680,6 @@ static int nfs4_recovery_handle_error(st
 			break;
 		case -NFS4ERR_STALE_CLIENTID:
 			set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
-			nfs4_state_clear_reclaim_reboot(clp);
 			nfs4_state_start_reclaim_reboot(clp);
 			break;
 		case -NFS4ERR_EXPIRED:


Patches currently in stable-queue which might be from trond.myklebust@primarydata.com are

queue-4.4/nfsv4-fix-client-recovery-when-server-reboots-multiple-times.patch
queue-4.4/nfs-don-t-take-a-reference-on-fl-fl_file-for-lock-operation.patch