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-rw-r--r--src/plugins/dpdk/device/flow.c286
1 files changed, 286 insertions, 0 deletions
diff --git a/src/plugins/dpdk/device/flow.c b/src/plugins/dpdk/device/flow.c
new file mode 100644
index 00000000000..a0eb95f8fa0
--- /dev/null
+++ b/src/plugins/dpdk/device/flow.c
@@ -0,0 +1,286 @@
+/*
+ * 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);
+ return 0;
+ }
+
+ 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;
+
+ 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);
+ }
+ }
+ 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:
+ */