NFSv4.x: Allow multiple callbacks in flight

Hook the callback channel into the same session management machinery
as we use for the forward channel.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index ff8195bd75ea..5fe1cecbf9f0 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -37,10 +37,11 @@ enum nfs4_callback_opnum {
         OP_CB_ILLEGAL = 10044,
 };
 
+struct nfs4_slot;
 struct cb_process_state {
         __be32                  drc_status;
         struct nfs_client       *clp;
-        u32                     slotid;
+        struct nfs4_slot        *slot;
         u32                     minorversion;
         struct net              *net;
 };