NFSv4.1: Support dynamic resizing of the session slot table

Allow the server to control the size of the session slot table
by adjusting the value of sr_target_max_slots in the reply to the
SEQUENCE operation.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 842cb8c2f65d..1b7fa73c9436 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -254,15 +254,14 @@ static void nfs4_end_drain_session(struct nfs_client *clp)
 {
         struct nfs4_session *ses = clp->cl_session;
         struct nfs4_slot_table *tbl;
-        int max_slots;
+        unsigned int i;
 
         if (ses == NULL)
                 return;
         tbl = &ses->fc_slot_table;
         if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
                 spin_lock(&tbl->slot_tbl_lock);
-                max_slots = tbl->max_slots;
-                while (max_slots--) {
+                for (i = 0; i <= tbl->max_slotid; i++) {
                         if (rpc_wake_up_first(&tbl->slot_tbl_waitq,
                                                 nfs4_set_task_privileged,
                                                 NULL) == NULL)
@@ -2043,6 +2042,7 @@ static int nfs4_recall_slot(struct nfs_client *clp)
         old = fc_tbl->slots;
         fc_tbl->slots = new;
         fc_tbl->max_slots = fc_tbl->target_highest_slotid + 1;
+        fc_tbl->max_slotid = fc_tbl->target_highest_slotid;
         clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots;
         spin_unlock(&fc_tbl->slot_tbl_lock);