From: ZhangXiaoxu zhangxiaoxu5@huawei.com
commit f02f3755dbd14fb935d24b14650fff9ba92243b8 upstream.
stat command with soft mount never return after server is stopped.
When alloc a new client, the state of the client will be set to NFS4CLNT_LEASE_EXPIRED.
When the server is stopped, the state manager will work, and accord the state to recover. But the state is NFS4CLNT_LEASE_EXPIRED, it will drain the slot table and lead other task to wait queue, until the client recovered. Then the stat command is hung.
When discover server trunking, the client will renew the lease, but check the client state, it lead the client state corruption.
So, we need to call state manager to recover it when detect server ip trunking.
Signed-off-by: ZhangXiaoxu zhangxiaoxu5@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/nfs/nfs4state.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -159,6 +159,10 @@ int nfs40_discover_server_trunking(struc /* Sustain the lease, even if it's empty. If the clientid4 * goes stale it's of no use for trunking discovery. */ nfs4_schedule_state_renewal(*result); + + /* If the client state need to recover, do it. */ + if (clp->cl_state) + nfs4_schedule_state_manager(clp); } out: return status;