NFSv4: Fix client recovery when server reboots multiple times

[ 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>

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 1f9d57ab8df45bce478eda519d8a84e8f3b8a0d6..f471662c0a1fd84117ff0bfc1fe2989c601d9c75 100644 (file)
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1650,7 +1650,6 @@ static int nfs4_recovery_handle_error(struct nfs_client *clp, int error)
                        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: