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 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: nfsv4-fix-client-recovery-when-server-reboots-multiple-times.patch and it can be found in the queue-3.18 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 Tue Dec 5 18:18:39 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 @@ -1650,7 +1650,6 @@ 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-3.18/nfsv4-fix-client-recovery-when-server-reboots-multiple-times.patch queue-3.18/nfs-don-t-take-a-reference-on-fl-fl_file-for-lock-operation.patch