nfs41: Backchannel: Refactor nfs4_reset_slot_table()

Generalize nfs4_reset_slot_table() so it can be used to reset the
backchannel slot table in addition to the forechannel slot table.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>

1 files changed, 27 insertions, 11 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5da939d577d5..a7b1d6c228cd 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4370,19 +4370,21 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
         return status;
 }
 
-/* Reset a slot table */
-static int nfs4_reset_slot_table(struct nfs4_session *session)
+/*
+ * Reset a slot table
+ */
+static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
+                int old_max_slots, int ivalue)
 {
-        struct nfs4_slot_table *tbl = &session->fc_slot_table;
-        int i, max_slots = session->fc_attrs.max_reqs;
-        int old_max_slots = session->fc_slot_table.max_slots;
+        int i;
         int ret = 0;
 
-        dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
-                session->fc_attrs.max_reqs, tbl);
+        dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
 
-        /* Until we have dynamic slot table adjustment, insist
-         * upon the same slot table size */
+        /*
+         * Until we have dynamic slot table adjustment, insist
+         * upon the same slot table size
+         */
         if (max_slots != old_max_slots) {
                 dprintk("%s reset slot table does't match old\n",
                         __func__);
@@ -4391,7 +4393,7 @@ static int nfs4_reset_slot_table(struct nfs4_session *session)
         }
         spin_lock(&tbl->slot_tbl_lock);
         for (i = 0; i < max_slots; ++i)
-                tbl->slots[i].seq_nr = 1;
+                tbl->slots[i].seq_nr = ivalue;
         tbl->highest_used_slotid = -1;
         spin_unlock(&tbl->slot_tbl_lock);
         dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
@@ -4402,6 +4404,20 @@ out:
 }
 
 /*
+ * Reset the forechannel and backchannel slot tables
+ */
+static int nfs4_reset_slot_tables(struct nfs4_session *session)
+{
+        int status;
+
+        status = nfs4_reset_slot_table(&session->fc_slot_table,
+                        session->fc_attrs.max_reqs,
+                        session->fc_slot_table.max_slots,
+                        1);
+        return status;
+}
+
+/*
  * Initialize slot table
  */
 static int nfs4_init_slot_table(struct nfs4_session *session)
@@ -4639,7 +4655,7 @@ int nfs4_proc_create_session(struct nfs_client *clp, int reset)
 
         /* Init or reset the fore channel */
         if (reset)
-                status = nfs4_reset_slot_table(session);
+                status = nfs4_reset_slot_tables(session);
         else
                 status = nfs4_init_slot_table(session);
         dprintk("fore channel slot table initialization returned %d\n", status);