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-rw-r--r--src/vnet/flow/flow.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/src/vnet/flow/flow.c b/src/vnet/flow/flow.c
new file mode 100644
index 00000000000..91e51120a7e
--- /dev/null
+++ b/src/vnet/flow/flow.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/flow/flow.h>
+
+vnet_flow_main_t flow_main;
+
+int
+vnet_flow_get_range (vnet_main_t * vnm, char *owner, u32 count, u32 * start)
+{
+ vnet_flow_main_t *fm = &flow_main;
+ vnet_flow_range_t *r;
+
+ /* skip 0 */
+ if (fm->flows_used == 0)
+ fm->flows_used = 1;
+
+ *start = fm->flows_used;
+ fm->flows_used += count;
+ vec_add2 (fm->ranges, r, 1);
+ r->start = *start;
+ r->count = count;
+ r->owner = format (0, "%s%c", owner, 0);
+ return 0;
+}
+
+int
+vnet_flow_add (vnet_main_t * vnm, vnet_flow_t * flow, u32 * flow_index)
+{
+ vnet_flow_main_t *fm = &flow_main;
+ vnet_flow_t *f;
+
+ pool_get (fm->global_flow_pool, f);
+ *flow_index = f - fm->global_flow_pool;
+ clib_memcpy (f, flow, sizeof (vnet_flow_t));
+ f->private_data = 0;
+ f->index = *flow_index;
+ return 0;
+}
+
+vnet_flow_t *
+vnet_get_flow (u32 flow_index)
+{
+ vnet_flow_main_t *fm = &flow_main;
+ if (pool_is_free_index (fm->global_flow_pool, flow_index))
+ return 0;
+
+ return pool_elt_at_index (fm->global_flow_pool, flow_index);
+}
+
+int
+vnet_flow_del (vnet_main_t * vnm, u32 flow_index)
+{
+ vnet_flow_main_t *fm = &flow_main;
+ vnet_flow_t *f = vnet_get_flow (flow_index);
+ uword hw_if_index;
+ uword private_data;
+
+ if (f == 0)
+ return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
+
+ /* *INDENT-OFF* */
+ hash_foreach (hw_if_index, private_data, f->private_data,
+ ({
+ vnet_flow_disable (vnm, flow_index, hw_if_index);
+ }));
+ /* *INDENT-ON* */
+
+ hash_free (f->private_data);
+ memset (f, 0, sizeof (*f));
+ pool_put (fm->global_flow_pool, f);
+ return 0;
+}
+
+int
+vnet_flow_enable (vnet_main_t * vnm, u32 flow_index, u32 hw_if_index)
+{
+ vnet_flow_t *f = vnet_get_flow (flow_index);
+ vnet_hw_interface_t *hi;
+ vnet_device_class_t *dev_class;
+ uword private_data;
+ int rv;
+
+ if (!vnet_hw_interface_is_valid (vnm, hw_if_index))
+ return VNET_FLOW_ERROR_NO_SUCH_INTERFACE;
+
+ /* don't enable flow twice */
+ if (hash_get (f->private_data, hw_if_index) != 0)
+ return VNET_FLOW_ERROR_ALREADY_DONE;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
+
+ if (dev_class->flow_ops_function == 0)
+ return VNET_FLOW_ERROR_NOT_SUPPORTED;
+
+ rv = dev_class->flow_ops_function (vnm, VNET_FLOW_DEV_OP_ADD_FLOW,
+ hi->dev_instance, flow_index,
+ &private_data);
+
+ if (rv)
+ return rv;
+
+ hash_set (f->private_data, hw_if_index, private_data);
+ return 0;
+}
+
+int
+vnet_flow_disable (vnet_main_t * vnm, u32 flow_index, u32 hw_if_index)
+{
+ vnet_flow_t *f = vnet_get_flow (flow_index);
+ vnet_hw_interface_t *hi;
+ vnet_device_class_t *dev_class;
+ uword *p;
+ int rv;
+
+ if (!vnet_hw_interface_is_valid (vnm, hw_if_index))
+ return VNET_FLOW_ERROR_NO_SUCH_INTERFACE;
+
+ /* don't disable if not enabled */
+ if ((p = hash_get (f->private_data, hw_if_index)) == 0)
+ return VNET_FLOW_ERROR_ALREADY_DONE;
+
+ hi = vnet_get_hw_interface (vnm, hw_if_index);
+ dev_class = vnet_get_device_class (vnm, hi->dev_class_index);
+
+ rv = dev_class->flow_ops_function (vnm, VNET_FLOW_DEV_OP_DEL_FLOW,
+ hi->dev_instance, flow_index, p);
+
+ if (rv)
+ return rv;
+
+ hash_unset (f->private_data, hw_if_index);
+ return 0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */