nfs41: resize slot table in reset
When session is reset, client can renegotiate slot table size.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b829118..84b53d3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4618,26 +4618,32 @@
/*
* Reset a slot table
*/
-static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
- int old_max_slots, int ivalue)
+static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
+ int ivalue)
{
+ struct nfs4_slot *new = NULL;
int i;
int ret = 0;
- dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
+ dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
+ max_reqs, tbl->max_slots);
- /*
- * 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__);
- ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
- goto out;
+ /* Does the newly negotiated max_reqs match the existing slot table? */
+ if (max_reqs != tbl->max_slots) {
+ ret = -ENOMEM;
+ new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
+ GFP_KERNEL);
+ if (!new)
+ goto out;
+ ret = 0;
+ kfree(tbl->slots);
}
spin_lock(&tbl->slot_tbl_lock);
- for (i = 0; i < max_slots; ++i)
+ if (new) {
+ tbl->slots = new;
+ tbl->max_slots = max_reqs;
+ }
+ for (i = 0; i < tbl->max_slots; ++i)
tbl->slots[i].seq_nr = ivalue;
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
@@ -4655,16 +4661,12 @@
int status;
status = nfs4_reset_slot_table(&session->fc_slot_table,
- session->fc_attrs.max_reqs,
- session->fc_slot_table.max_slots,
- 1);
+ session->fc_attrs.max_reqs, 1);
if (status)
return status;
status = nfs4_reset_slot_table(&session->bc_slot_table,
- session->bc_attrs.max_reqs,
- session->bc_slot_table.max_slots,
- 0);
+ session->bc_attrs.max_reqs, 0);
return status;
}