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/*
* 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_fast (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);
clib_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 (f == 0)
return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
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;
if (f->actions & VNET_FLOW_ACTION_REDIRECT_TO_NODE)
{
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
f->redirect_device_input_next_index =
vlib_node_add_next (vnm->vlib_main, hw->input_node_index,
f->redirect_node_index);
}
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 (f == 0)
return VNET_FLOW_ERROR_NO_SUCH_ENTRY;
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:
*/
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