NFSv4.0: Re-establish the callback channel on NFS4ERR_CB_PATHDOWN

When the NFSv4.0 server tells us that it can no-longer talk to us
on the callback channel, we should attempt a new SETCLIENTID in
order to re-transmit the callback channel information.

Note that as long as we do not change the boot verifier, this is
a safe procedure; the server is required to keep our state.

Also move the function nfs_handle_cb_pathdown to fs/nfs/nfs4state.c,
and change the name in order to mark it as being specific to NFSv4.0.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 0 insertions, 17 deletions

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index e27c0972f94e..12de88353eeb 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -453,11 +453,6 @@ static void nfs_client_mark_return_all_delegation_types(struct nfs_client *clp,
         rcu_read_unlock();
 }
 
-static void nfs_client_mark_return_all_delegations(struct nfs_client *clp)
-{
-        nfs_client_mark_return_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
-}
-
 static void nfs_delegation_run_state_manager(struct nfs_client *clp)
 {
         if (test_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state))
@@ -498,18 +493,6 @@ void nfs_expire_all_delegations(struct nfs_client *clp)
         nfs_expire_all_delegation_types(clp, FMODE_READ|FMODE_WRITE);
 }
 
-/**
- * nfs_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN
- * @clp: client to process
- *
- */
-void nfs_handle_cb_pathdown(struct nfs_client *clp)
-{
-        if (clp == NULL)
-                return;
-        nfs_client_mark_return_all_delegations(clp);
-}
-
 static void nfs_mark_return_unreferenced_delegations(struct nfs_server *server)
 {
         struct nfs_delegation *delegation;