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Diffstat (limited to 'fs/nfs/callback_xdr.c')
-rw-r--r--fs/nfs/callback_xdr.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index dbd0d649805c..7a2d6c5864ca 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -596,6 +596,37 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
return htonl(NFS_OK);
}
+static void nfs4_callback_free_slot(struct nfs4_session *session)
+{
+ struct nfs4_slot_table *tbl = &session->bc_slot_table;
+
+ spin_lock(&tbl->slot_tbl_lock);
+ /*
+ * Let the state manager know callback processing done.
+ * A single slot, so highest used slotid is either 0 or -1
+ */
+ tbl->highest_used_slotid--;
+ nfs4_check_drain_bc_complete(session);
+ spin_unlock(&tbl->slot_tbl_lock);
+}
+
+static void nfs4_cb_free_slot(struct nfs_client *clp)
+{
+ if (clp && clp->cl_session)
+ nfs4_callback_free_slot(clp->cl_session);
+}
+
+/* A single slot, so highest used slotid is either 0 or -1 */
+void nfs4_cb_take_slot(struct nfs_client *clp)
+{
+ struct nfs4_slot_table *tbl = &clp->cl_session->bc_slot_table;
+
+ spin_lock(&tbl->slot_tbl_lock);
+ tbl->highest_used_slotid++;
+ BUG_ON(tbl->highest_used_slotid != 0);
+ spin_unlock(&tbl->slot_tbl_lock);
+}
+
#else /* CONFIG_NFS_V4_1 */
static __be32
@@ -604,6 +635,9 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
}
+static void nfs4_cb_free_slot(struct nfs_client *clp)
+{
+}
#endif /* CONFIG_NFS_V4_1 */
static __be32
@@ -724,6 +758,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *r
*hdr_res.status = status;
*hdr_res.nops = htonl(nops);
+ nfs4_cb_free_slot(cps.clp);
nfs_put_client(cps.clp);
dprintk("%s: done, status = %u\n", __func__, ntohl(status));
return rpc_success;