nfs41: prepare for back channel drc

Make all cb_sequence arguments available to verify_seqid which will make
replay decisions.

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

1 files changed, 9 insertions, 10 deletions

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 49c4b548b4d0..3d7edd65577b 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -153,34 +153,34 @@ int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const n
  * a single outstanding callback request at a time.
  */
 static int
-validate_seqid(struct nfs4_slot_table *tbl, u32 slotid, u32 seqid)
+validate_seqid(struct nfs4_slot_table *tbl, struct cb_sequenceargs * args)
 {
         struct nfs4_slot *slot;
 
         dprintk("%s enter. slotid %d seqid %d\n",
-                __func__, slotid, seqid);
+                __func__, args->csa_slotid, args->csa_sequenceid);
 
-        if (slotid > NFS41_BC_MAX_CALLBACKS)
+        if (args->csa_slotid > NFS41_BC_MAX_CALLBACKS)
                 return htonl(NFS4ERR_BADSLOT);
 
-        slot = tbl->slots + slotid;
+        slot = tbl->slots + args->csa_slotid;
         dprintk("%s slot table seqid: %d\n", __func__, slot->seq_nr);
 
         /* Normal */
-        if (likely(seqid == slot->seq_nr + 1)) {
+        if (likely(args->csa_sequenceid == slot->seq_nr + 1)) {
                 slot->seq_nr++;
                 return htonl(NFS4_OK);
         }
 
         /* Replay */
-        if (seqid == slot->seq_nr) {
+        if (args->csa_sequenceid == slot->seq_nr) {
                 dprintk("%s seqid %d is a replay - no DRC available\n",
-                        __func__, seqid);
+                        __func__, args->csa_sequenceid);
                 return htonl(NFS4_OK);
         }
 
         /* Wraparound */
-        if (seqid == 1 && (slot->seq_nr + 1) == 0) {
+        if (args->csa_sequenceid == 1 && (slot->seq_nr + 1) == 0) {
                 slot->seq_nr = 1;
                 return htonl(NFS4_OK);
         }
@@ -291,8 +291,7 @@ unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
         if (clp == NULL)
                 goto out;
 
-        status = validate_seqid(&clp->cl_session->bc_slot_table,
-                                args->csa_slotid, args->csa_sequenceid);
+        status = validate_seqid(&clp->cl_session->bc_slot_table, args);
         if (status)
                 goto out_putclient;