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/*
* Copyright (c) 2019 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 <vppinfra/vec.h>
#include <vppinfra/format.h>
#include <vlib/unix/cj.h>
#include <assert.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ethernet/arp_packet.h>
#include <dpdk/device/dpdk.h>
#include <dpdk/device/dpdk_priv.h>
#include <vppinfra/error.h>
/* constant structs */
static const struct rte_flow_attr ingress = {.ingress = 1 };
static const struct rte_flow_item_eth any_eth[2] = { };
static const struct rte_flow_item_vlan any_vlan[2] = { };
static int
dpdk_flow_add_n_touple (dpdk_device_t * xd, vnet_flow_t * f,
dpdk_flow_entry_t * fe)
{
struct rte_flow_item_ipv4 ip4[2] = { };
struct rte_flow_item_ipv6 ip6[2] = { };
struct rte_flow_item_udp udp[2] = { };
struct rte_flow_item_tcp tcp[2] = { };
struct rte_flow_action_mark mark = { 0 };
struct rte_flow_item *item, *items = 0;
struct rte_flow_action *action, *actions = 0;
u16 src_port, dst_port, src_port_mask, dst_port_mask;
u8 protocol;
int rv = 0;
if (f->actions & (~xd->supported_flow_actions))
return VNET_FLOW_ERROR_NOT_SUPPORTED;
/* Ethernet */
vec_add2 (items, item, 1);
item->type = RTE_FLOW_ITEM_TYPE_ETH;
item->spec = any_eth;
item->mask = any_eth + 1;
/* VLAN */
vec_add2 (items, item, 1);
item->type = RTE_FLOW_ITEM_TYPE_VLAN;
item->spec = any_vlan;
item->mask = any_vlan + 1;
/* IP */
vec_add2 (items, item, 1);
if (f->type == VNET_FLOW_TYPE_IP6_N_TUPLE)
{
vnet_flow_ip6_n_tuple_t *t6 = &f->ip6_n_tuple;
clib_memcpy (ip6[0].hdr.src_addr, &t6->src_addr.addr, 16);
clib_memcpy (ip6[1].hdr.src_addr, &t6->src_addr.mask, 16);
clib_memcpy (ip6[0].hdr.dst_addr, &t6->dst_addr.addr, 16);
clib_memcpy (ip6[1].hdr.dst_addr, &t6->dst_addr.mask, 16);
item->type = RTE_FLOW_ITEM_TYPE_IPV6;
item->spec = ip6;
item->mask = ip6 + 1;
src_port = t6->src_port.port;
dst_port = t6->dst_port.port;
src_port_mask = t6->src_port.mask;
dst_port_mask = t6->dst_port.mask;
protocol = t6->protocol;
}
else
{
vnet_flow_ip4_n_tuple_t *t4 = &f->ip4_n_tuple;
ASSERT (f->type == VNET_FLOW_TYPE_IP4_N_TUPLE);
ip4[0].hdr.src_addr = t4->src_addr.mask.as_u32;
ip4[1].hdr.src_addr = t4->src_addr.mask.as_u32;
ip4[0].hdr.dst_addr = t4->dst_addr.addr.as_u32;
ip4[1].hdr.dst_addr = t4->dst_addr.mask.as_u32;
item->type = RTE_FLOW_ITEM_TYPE_IPV4;
item->spec = ip4;
item->mask = ip4 + 1;
src_port = t4->src_port.port;
dst_port = t4->dst_port.mask;
src_port_mask = t4->src_port.mask;
dst_port_mask = t4->dst_port.mask;
protocol = t4->protocol;
}
/* Layer 4 */
vec_add2 (items, item, 1);
if (protocol == IP_PROTOCOL_UDP)
{
udp[0].hdr.src_port = clib_host_to_net_u16 (src_port);
udp[1].hdr.src_port = clib_host_to_net_u16 (src_port_mask);
udp[0].hdr.dst_port = clib_host_to_net_u16 (dst_port);
udp[1].hdr.dst_port = clib_host_to_net_u16 (dst_port_mask);
item->type = RTE_FLOW_ITEM_TYPE_UDP;
item->spec = udp;
item->mask = udp + 1;
}
else if (protocol == IP_PROTOCOL_TCP)
{
tcp[0].hdr.src_port = clib_host_to_net_u16 (src_port);
tcp[1].hdr.src_port = clib_host_to_net_u16 (src_port_mask);
tcp[0].hdr.dst_port = clib_host_to_net_u16 (dst_port);
tcp[1].hdr.dst_port = clib_host_to_net_u16 (dst_port_mask);
item->type = RTE_FLOW_ITEM_TYPE_TCP;
item->spec = tcp;
item->mask = tcp + 1;
}
else
{
rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
goto done;
}
/* The End */
vec_add2 (items, item, 1);
item->type = RTE_FLOW_ITEM_TYPE_END;
vec_add2 (actions, action, 1);
action->type = RTE_FLOW_ACTION_TYPE_PASSTHRU;
vec_add2 (actions, action, 1);
mark.id = fe->mark;
action->type = RTE_FLOW_ACTION_TYPE_MARK;
action->conf = &mark;
vec_add2 (actions, action, 1);
action->type = RTE_FLOW_ACTION_TYPE_END;
fe->handle = rte_flow_create (xd->device_index, &ingress, items, actions,
&xd->last_flow_error);
if (!fe->handle)
rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
done:
vec_free (items);
vec_free (actions);
return rv;
}
int
dpdk_flow_ops_fn (vnet_main_t * vnm, vnet_flow_dev_op_t op, u32 dev_instance,
u32 flow_index, uword * private_data)
{
dpdk_main_t *dm = &dpdk_main;
vnet_flow_t *flow = vnet_get_flow (flow_index);
dpdk_device_t *xd = vec_elt_at_index (dm->devices, dev_instance);
dpdk_flow_entry_t *fe;
dpdk_flow_lookup_entry_t *fle = 0;
int rv;
if (op == VNET_FLOW_DEV_OP_DEL_FLOW)
{
ASSERT (*private_data >= vec_len (xd->flow_entries));
fe = vec_elt_at_index (xd->flow_entries, *private_data);
if ((rv = rte_flow_destroy (xd->device_index, fe->handle,
&xd->last_flow_error)))
return VNET_FLOW_ERROR_INTERNAL;
memset (fe, 0, sizeof (*fe));
pool_put (xd->flow_entries, fe);
goto disable_rx_offload;
}
if (op != VNET_FLOW_DEV_OP_ADD_FLOW)
return VNET_FLOW_ERROR_NOT_SUPPORTED;
pool_get (xd->flow_entries, fe);
fe->flow_index = flow->index;
if (flow->actions == 0)
{
rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
goto done;
}
/* if we need to mark packets, assign one mark */
if (flow->actions & (VNET_FLOW_ACTION_MARK |
VNET_FLOW_ACTION_REDIRECT_TO_NODE |
VNET_FLOW_ACTION_BUFFER_ADVANCE))
{
/* reserve slot 0 */
if (xd->flow_lookup_entries == 0)
pool_get_aligned (xd->flow_lookup_entries, fle,
CLIB_CACHE_LINE_BYTES);
pool_get_aligned (xd->flow_lookup_entries, fle, CLIB_CACHE_LINE_BYTES);
fe->mark = fle - xd->flow_lookup_entries;
}
else
fe->mark = 0;
if ((xd->flags & DPDK_DEVICE_FLAG_RX_FLOW_OFFLOAD) == 0)
{
xd->flags |= DPDK_DEVICE_FLAG_RX_FLOW_OFFLOAD;
dpdk_device_setup (xd);
}
switch (flow->type)
{
case VNET_FLOW_TYPE_IP4_N_TUPLE:
case VNET_FLOW_TYPE_IP6_N_TUPLE:
if ((rv = dpdk_flow_add_n_touple (xd, flow, fe)))
goto done;
break;
default:
rv = VNET_FLOW_ERROR_NOT_SUPPORTED;
goto done;
}
*private_data = fe - xd->flow_entries;
/* install entry in the lookup table */
memset (fle, -1, sizeof (*fle));
if (flow->actions & VNET_FLOW_ACTION_MARK)
fle->flow_id = flow->mark_flow_id;
if (flow->actions & VNET_FLOW_ACTION_REDIRECT_TO_NODE)
fle->next_index = flow->redirect_device_input_next_index;
if (flow->actions & VNET_FLOW_ACTION_BUFFER_ADVANCE)
fle->buffer_advance = flow->buffer_advance;
done:
if (rv)
{
memset (fe, 0, sizeof (*fe));
pool_put (xd->flow_entries, fe);
if (fle)
{
memset (fle, 0, sizeof (*fle));
pool_put (xd->flow_lookup_entries, fle);
}
}
disable_rx_offload:
if ((xd->flags & DPDK_DEVICE_FLAG_RX_FLOW_OFFLOAD) != 0
&& pool_elts (xd->flow_entries) == 0)
{
xd->flags &= ~DPDK_DEVICE_FLAG_RX_FLOW_OFFLOAD;
dpdk_device_setup (xd);
}
return rv;
}
u8 *
format_dpdk_flow (u8 * s, va_list * args)
{
u32 dev_instance = va_arg (*args, u32);
u32 flow_index = va_arg (*args, u32);
uword private_data = va_arg (*args, uword);
dpdk_main_t *dm = &dpdk_main;
dpdk_device_t *xd = vec_elt_at_index (dm->devices, dev_instance);
dpdk_flow_entry_t *fe;
if (flow_index == ~0)
{
s = format (s, "%-25s: %U\n", "supported flow actions",
format_flow_actions, xd->supported_flow_actions);
s = format (s, "%-25s: %d\n", "last DPDK error type",
xd->last_flow_error.type);
s = format (s, "%-25s: %s\n", "last DPDK error message",
xd->last_flow_error.message ? xd->last_flow_error.message :
"n/a");
return s;
}
fe = vec_elt_at_index (xd->flow_entries, private_data);
if (!fe)
return format (s, "unknown flow");
s = format (s, "mark %u", fe->mark);
return s;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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