@@ -32,6 +32,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_rss.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_mr.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_flow.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_flow_dv.c
+SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_flow_tcf.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_flow_verbs.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_socket.c
SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_nl.c
@@ -44,6 +44,7 @@
#include "mlx5_rxtx.h"
#include "mlx5_autoconf.h"
#include "mlx5_defs.h"
+#include "mlx5_flow.h"
#include "mlx5_glue.h"
#include "mlx5_mr.h"
#include "mlx5_flow.h"
@@ -286,6 +287,8 @@ mlx5_dev_close(struct rte_eth_dev *dev)
close(priv->nl_socket_route);
if (priv->nl_socket_rdma >= 0)
close(priv->nl_socket_rdma);
+ if (priv->mnl_socket)
+ mlx5_flow_tcf_socket_destroy(priv->mnl_socket);
ret = mlx5_hrxq_ibv_verify(dev);
if (ret)
DRV_LOG(WARNING, "port %u some hash Rx queue still remain",
@@ -1135,6 +1138,34 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0));
if (vf && config.vf_nl_en)
mlx5_nl_mac_addr_sync(eth_dev);
+ priv->mnl_socket = mlx5_flow_tcf_socket_create();
+ if (!priv->mnl_socket) {
+ err = -rte_errno;
+ DRV_LOG(WARNING,
+ "flow rules relying on switch offloads will not be"
+ " supported: cannot open libmnl socket: %s",
+ strerror(rte_errno));
+ } else {
+ struct rte_flow_error error;
+ unsigned int ifindex = mlx5_ifindex(eth_dev);
+
+ if (!ifindex) {
+ err = -rte_errno;
+ error.message =
+ "cannot retrieve network interface index";
+ } else {
+ err = mlx5_flow_tcf_init(priv->mnl_socket, ifindex,
+ &error);
+ }
+ if (err) {
+ DRV_LOG(WARNING,
+ "flow rules relying on switch offloads will"
+ " not be supported: %s: %s",
+ error.message, strerror(rte_errno));
+ mlx5_flow_tcf_socket_destroy(priv->mnl_socket);
+ priv->mnl_socket = NULL;
+ }
+ }
TAILQ_INIT(&priv->flows);
TAILQ_INIT(&priv->ctrl_flows);
/* Hint libmlx5 to use PMD allocator for data plane resources */
@@ -1187,6 +1218,8 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev,
close(priv->nl_socket_route);
if (priv->nl_socket_rdma >= 0)
close(priv->nl_socket_rdma);
+ if (priv->mnl_socket)
+ mlx5_flow_tcf_socket_destroy(priv->mnl_socket);
if (own_domain_id)
claim_zero(rte_eth_switch_domain_free(priv->domain_id));
rte_free(priv);
@@ -41,6 +41,7 @@ extern const struct eth_dev_ops mlx5_dev_ops_isolate;
#ifdef HAVE_IBV_FLOW_DV_SUPPORT
extern const struct mlx5_flow_driver_ops mlx5_flow_dv_drv_ops;
#endif
+extern const struct mlx5_flow_driver_ops mlx5_flow_tcf_drv_ops;
extern const struct mlx5_flow_driver_ops mlx5_flow_verbs_drv_ops;
const struct mlx5_flow_driver_ops mlx5_flow_null_drv_ops;
@@ -50,6 +51,7 @@ const struct mlx5_flow_driver_ops *flow_drv_ops[] = {
#ifdef HAVE_IBV_FLOW_DV_SUPPORT
[MLX5_FLOW_TYPE_DV] = &mlx5_flow_dv_drv_ops,
#endif
+ [MLX5_FLOW_TYPE_TCF] = &mlx5_flow_tcf_drv_ops,
[MLX5_FLOW_TYPE_VERBS] = &mlx5_flow_verbs_drv_ops,
[MLX5_FLOW_TYPE_MAX] = &mlx5_flow_null_drv_ops
};
@@ -1610,7 +1612,9 @@ flow_get_drv_type(struct rte_eth_dev *dev __rte_unused,
struct priv *priv __rte_unused = dev->data->dev_private;
enum mlx5_flow_drv_type type = MLX5_FLOW_TYPE_MAX;
- if (!attr->transfer) {
+ if (attr->transfer) {
+ type = MLX5_FLOW_TYPE_TCF;
+ } else {
#ifdef HAVE_IBV_FLOW_DV_SUPPORT
type = priv->config.dv_flow_en ? MLX5_FLOW_TYPE_DV :
MLX5_FLOW_TYPE_VERBS;
@@ -82,6 +82,11 @@
#define MLX5_ACTION_FLAG (1u << 3)
#define MLX5_ACTION_MARK (1u << 4)
#define MLX5_ACTION_COUNT (1u << 5)
+#define MLX5_ACTION_PORT_ID (1u << 6)
+#define MLX5_ACTION_OF_POP_VLAN (1u << 7)
+#define MLX5_ACTION_OF_PUSH_VLAN (1u << 8)
+#define MLX5_ACTION_OF_SET_VLAN_VID (1u << 9)
+#define MLX5_ACTION_OF_SET_VLAN_PCP (1u << 10)
/* possible L3 layers protocols filtering. */
#define MLX5_IP_PROTOCOL_TCP 6
@@ -131,6 +136,7 @@
enum mlx5_flow_drv_type {
MLX5_FLOW_TYPE_MIN,
MLX5_FLOW_TYPE_DV,
+ MLX5_FLOW_TYPE_TCF,
MLX5_FLOW_TYPE_VERBS,
MLX5_FLOW_TYPE_MAX,
};
@@ -170,6 +176,12 @@ struct mlx5_flow_dv {
int actions_n; /**< number of actions. */
};
+/** Linux TC flower driver for E-Switch flow. */
+struct mlx5_flow_tcf {
+ struct nlmsghdr *nlh;
+ struct tcmsg *tcm;
+};
+
/* Verbs specification header. */
struct ibv_spec_header {
enum ibv_flow_spec_type type;
@@ -199,6 +211,7 @@ struct mlx5_flow {
#ifdef HAVE_IBV_FLOW_DV_SUPPORT
struct mlx5_flow_dv dv;
#endif
+ struct mlx5_flow_tcf tcf;
struct mlx5_flow_verbs verbs;
};
};
@@ -322,4 +335,11 @@ int mlx5_flow_validate_item_vxlan_gpe(const struct rte_flow_item *item,
struct rte_eth_dev *dev,
struct rte_flow_error *error);
+/* mlx5_flow_tcf.c */
+
+int mlx5_flow_tcf_init(struct mnl_socket *nl, unsigned int ifindex,
+ struct rte_flow_error *error);
+struct mnl_socket *mlx5_flow_tcf_socket_create(void);
+void mlx5_flow_tcf_socket_destroy(struct mnl_socket *nl);
+
#endif /* RTE_PMD_MLX5_FLOW_H_ */
new file mode 100644
@@ -0,0 +1,1608 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2018 6WIND S.A.
+ * Copyright 2018 Mellanox Technologies, Ltd
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <libmnl/libmnl.h>
+#include <linux/if_ether.h>
+#include <linux/netlink.h>
+#include <linux/pkt_cls.h>
+#include <linux/pkt_sched.h>
+#include <linux/rtnetlink.h>
+#include <linux/tc_act/tc_gact.h>
+#include <linux/tc_act/tc_mirred.h>
+#include <netinet/in.h>
+#include <stdalign.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+
+#include <rte_byteorder.h>
+#include <rte_errno.h>
+#include <rte_ether.h>
+#include <rte_flow.h>
+#include <rte_malloc.h>
+
+#include "mlx5.h"
+#include "mlx5_flow.h"
+#include "mlx5_autoconf.h"
+
+#ifdef HAVE_TC_ACT_VLAN
+
+#include <linux/tc_act/tc_vlan.h>
+
+#else /* HAVE_TC_ACT_VLAN */
+
+#define TCA_VLAN_ACT_POP 1
+#define TCA_VLAN_ACT_PUSH 2
+#define TCA_VLAN_ACT_MODIFY 3
+#define TCA_VLAN_PARMS 2
+#define TCA_VLAN_PUSH_VLAN_ID 3
+#define TCA_VLAN_PUSH_VLAN_PROTOCOL 4
+#define TCA_VLAN_PAD 5
+#define TCA_VLAN_PUSH_VLAN_PRIORITY 6
+
+struct tc_vlan {
+ tc_gen;
+ int v_action;
+};
+
+#endif /* HAVE_TC_ACT_VLAN */
+
+/* Normally found in linux/netlink.h. */
+#ifndef NETLINK_CAP_ACK
+#define NETLINK_CAP_ACK 10
+#endif
+
+/* Normally found in linux/pkt_sched.h. */
+#ifndef TC_H_MIN_INGRESS
+#define TC_H_MIN_INGRESS 0xfff2u
+#endif
+
+/* Normally found in linux/pkt_cls.h. */
+#ifndef TCA_CLS_FLAGS_SKIP_SW
+#define TCA_CLS_FLAGS_SKIP_SW (1 << 1)
+#endif
+#ifndef HAVE_TCA_FLOWER_ACT
+#define TCA_FLOWER_ACT 3
+#endif
+#ifndef HAVE_TCA_FLOWER_FLAGS
+#define TCA_FLOWER_FLAGS 22
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_ETH_TYPE
+#define TCA_FLOWER_KEY_ETH_TYPE 8
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_ETH_DST
+#define TCA_FLOWER_KEY_ETH_DST 4
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_ETH_DST_MASK
+#define TCA_FLOWER_KEY_ETH_DST_MASK 5
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_ETH_SRC
+#define TCA_FLOWER_KEY_ETH_SRC 6
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_ETH_SRC_MASK
+#define TCA_FLOWER_KEY_ETH_SRC_MASK 7
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IP_PROTO
+#define TCA_FLOWER_KEY_IP_PROTO 9
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV4_SRC
+#define TCA_FLOWER_KEY_IPV4_SRC 10
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV4_SRC_MASK
+#define TCA_FLOWER_KEY_IPV4_SRC_MASK 11
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV4_DST
+#define TCA_FLOWER_KEY_IPV4_DST 12
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV4_DST_MASK
+#define TCA_FLOWER_KEY_IPV4_DST_MASK 13
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV6_SRC
+#define TCA_FLOWER_KEY_IPV6_SRC 14
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV6_SRC_MASK
+#define TCA_FLOWER_KEY_IPV6_SRC_MASK 15
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV6_DST
+#define TCA_FLOWER_KEY_IPV6_DST 16
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_IPV6_DST_MASK
+#define TCA_FLOWER_KEY_IPV6_DST_MASK 17
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_TCP_SRC
+#define TCA_FLOWER_KEY_TCP_SRC 18
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_TCP_SRC_MASK
+#define TCA_FLOWER_KEY_TCP_SRC_MASK 35
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_TCP_DST
+#define TCA_FLOWER_KEY_TCP_DST 19
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_TCP_DST_MASK
+#define TCA_FLOWER_KEY_TCP_DST_MASK 36
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_UDP_SRC
+#define TCA_FLOWER_KEY_UDP_SRC 20
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_UDP_SRC_MASK
+#define TCA_FLOWER_KEY_UDP_SRC_MASK 37
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_UDP_DST
+#define TCA_FLOWER_KEY_UDP_DST 21
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_UDP_DST_MASK
+#define TCA_FLOWER_KEY_UDP_DST_MASK 38
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_VLAN_ID
+#define TCA_FLOWER_KEY_VLAN_ID 23
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_VLAN_PRIO
+#define TCA_FLOWER_KEY_VLAN_PRIO 24
+#endif
+#ifndef HAVE_TCA_FLOWER_KEY_VLAN_ETH_TYPE
+#define TCA_FLOWER_KEY_VLAN_ETH_TYPE 25
+#endif
+
+#ifndef IPV6_ADDR_LEN
+#define IPV6_ADDR_LEN 16
+#endif
+
+/** Empty masks for known item types. */
+static const union {
+ struct rte_flow_item_port_id port_id;
+ struct rte_flow_item_eth eth;
+ struct rte_flow_item_vlan vlan;
+ struct rte_flow_item_ipv4 ipv4;
+ struct rte_flow_item_ipv6 ipv6;
+ struct rte_flow_item_tcp tcp;
+ struct rte_flow_item_udp udp;
+} flow_tcf_mask_empty;
+
+/** Supported masks for known item types. */
+static const struct {
+ struct rte_flow_item_port_id port_id;
+ struct rte_flow_item_eth eth;
+ struct rte_flow_item_vlan vlan;
+ struct rte_flow_item_ipv4 ipv4;
+ struct rte_flow_item_ipv6 ipv6;
+ struct rte_flow_item_tcp tcp;
+ struct rte_flow_item_udp udp;
+} flow_tcf_mask_supported = {
+ .port_id = {
+ .id = 0xffffffff,
+ },
+ .eth = {
+ .type = RTE_BE16(0xffff),
+ .dst.addr_bytes = "\xff\xff\xff\xff\xff\xff",
+ .src.addr_bytes = "\xff\xff\xff\xff\xff\xff",
+ },
+ .vlan = {
+ /* PCP and VID only, no DEI. */
+ .tci = RTE_BE16(0xefff),
+ .inner_type = RTE_BE16(0xffff),
+ },
+ .ipv4.hdr = {
+ .next_proto_id = 0xff,
+ .src_addr = RTE_BE32(0xffffffff),
+ .dst_addr = RTE_BE32(0xffffffff),
+ },
+ .ipv6.hdr = {
+ .proto = 0xff,
+ .src_addr =
+ "\xff\xff\xff\xff\xff\xff\xff\xff"
+ "\xff\xff\xff\xff\xff\xff\xff\xff",
+ .dst_addr =
+ "\xff\xff\xff\xff\xff\xff\xff\xff"
+ "\xff\xff\xff\xff\xff\xff\xff\xff",
+ },
+ .tcp.hdr = {
+ .src_port = RTE_BE16(0xffff),
+ .dst_port = RTE_BE16(0xffff),
+ },
+ .udp.hdr = {
+ .src_port = RTE_BE16(0xffff),
+ .dst_port = RTE_BE16(0xffff),
+ },
+};
+
+#define SZ_NLATTR_HDR MNL_ALIGN(sizeof(struct nlattr))
+#define SZ_NLATTR_NEST SZ_NLATTR_HDR
+#define SZ_NLATTR_DATA_OF(len) MNL_ALIGN(SZ_NLATTR_HDR + (len))
+#define SZ_NLATTR_TYPE_OF(typ) SZ_NLATTR_DATA_OF(sizeof(typ))
+#define SZ_NLATTR_STRZ_OF(str) SZ_NLATTR_DATA_OF(strlen(str) + 1)
+
+#define PTOI_TABLE_SZ_MAX(dev) (mlx5_dev_to_port_id((dev)->device, NULL, 0) + 2)
+
+/** DPDK port to network interface index (ifindex) conversion. */
+struct flow_tcf_ptoi {
+ uint16_t port_id; /**< DPDK port ID. */
+ unsigned int ifindex; /**< Network interface index. */
+};
+
+#define MLX5_TCF_FATE_ACTIONS (MLX5_ACTION_DROP | MLX5_ACTION_PORT_ID)
+
+/**
+ * Retrieve mask for pattern item.
+ *
+ * This function does basic sanity checks on a pattern item in order to
+ * return the most appropriate mask for it.
+ *
+ * @param[in] item
+ * Item specification.
+ * @param[in] mask_default
+ * Default mask for pattern item as specified by the flow API.
+ * @param[in] mask_supported
+ * Mask fields supported by the implementation.
+ * @param[in] mask_empty
+ * Empty mask to return when there is no specification.
+ * @param[out] error
+ * Perform verbose error reporting if not NULL.
+ *
+ * @return
+ * Either @p item->mask or one of the mask parameters on success, NULL
+ * otherwise and rte_errno is set.
+ */
+static const void *
+flow_tcf_item_mask(const struct rte_flow_item *item, const void *mask_default,
+ const void *mask_supported, const void *mask_empty,
+ size_t mask_size, struct rte_flow_error *error)
+{
+ const uint8_t *mask;
+ size_t i;
+
+ /* item->last and item->mask cannot exist without item->spec. */
+ if (!item->spec && (item->mask || item->last)) {
+ rte_flow_error_set(error, EINVAL,
+ RTE_FLOW_ERROR_TYPE_ITEM, item,
+ "\"mask\" or \"last\" field provided without"
+ " a corresponding \"spec\"");
+ return NULL;
+ }
+ /* No spec, no mask, no problem. */
+ if (!item->spec)
+ return mask_empty;
+ mask = item->mask ? item->mask : mask_default;
+ assert(mask);
+ /*
+ * Single-pass check to make sure that:
+ * - Mask is supported, no bits are set outside mask_supported.
+ * - Both item->spec and item->last are included in mask.
+ */
+ for (i = 0; i != mask_size; ++i) {
+ if (!mask[i])
+ continue;
+ if ((mask[i] | ((const uint8_t *)mask_supported)[i]) !=
+ ((const uint8_t *)mask_supported)[i]) {
+ rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK, mask,
+ "unsupported field found"
+ " in \"mask\"");
+ return NULL;
+ }
+ if (item->last &&
+ (((const uint8_t *)item->spec)[i] & mask[i]) !=
+ (((const uint8_t *)item->last)[i] & mask[i])) {
+ rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_LAST,
+ item->last,
+ "range between \"spec\" and \"last\""
+ " not comprised in \"mask\"");
+ return NULL;
+ }
+ }
+ return mask;
+}
+
+/**
+ * Build a conversion table between port ID and ifindex.
+ *
+ * @param[in] dev
+ * Pointer to Ethernet device.
+ * @param[out] ptoi
+ * Pointer to ptoi table.
+ * @param[in] len
+ * Size of ptoi table provided.
+ *
+ * @return
+ * Size of ptoi table filled.
+ */
+static unsigned int
+flow_tcf_build_ptoi_table(struct rte_eth_dev *dev, struct flow_tcf_ptoi *ptoi,
+ unsigned int len)
+{
+ unsigned int n = mlx5_dev_to_port_id(dev->device, NULL, 0);
+ uint16_t port_id[n + 1];
+ unsigned int i;
+ unsigned int own = 0;
+
+ /* At least one port is needed when no switch domain is present. */
+ if (!n) {
+ n = 1;
+ port_id[0] = dev->data->port_id;
+ } else {
+ n = RTE_MIN(mlx5_dev_to_port_id(dev->device, port_id, n), n);
+ }
+ if (n > len)
+ return 0;
+ for (i = 0; i != n; ++i) {
+ struct rte_eth_dev_info dev_info;
+
+ rte_eth_dev_info_get(port_id[i], &dev_info);
+ if (port_id[i] == dev->data->port_id)
+ own = i;
+ ptoi[i].port_id = port_id[i];
+ ptoi[i].ifindex = dev_info.if_index;
+ }
+ /* Ensure first entry of ptoi[] is the current device. */
+ if (own) {
+ ptoi[n] = ptoi[0];
+ ptoi[0] = ptoi[own];
+ ptoi[own] = ptoi[n];
+ }
+ /* An entry with zero ifindex terminates ptoi[]. */
+ ptoi[n].port_id = 0;
+ ptoi[n].ifindex = 0;
+ return n;
+}
+
+/**
+ * Verify the @p attr will be correctly understood by the E-switch.
+ *
+ * @param[in] attr
+ * Pointer to flow attributes
+ * @param[out] error
+ * Pointer to error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_tcf_validate_attributes(const struct rte_flow_attr *attr,
+ struct rte_flow_error *error)
+{
+ /*
+ * Supported attributes: no groups, some priorities and ingress only.
+ * Don't care about transfer as it is the caller's problem.
+ */
+ if (attr->group)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ATTR_GROUP, attr,
+ "groups are not supported");
+ if (attr->priority > 0xfffe)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
+ attr,
+ "lowest priority level is 0xfffe");
+ if (!attr->ingress)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+ attr, "only ingress is supported");
+ if (attr->egress)
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+ attr, "egress is not supported");
+ return 0;
+}
+
+/**
+ * Validate flow for E-Switch.
+ *
+ * @param[in] priv
+ * Pointer to the priv structure.
+ * @param[in] attr
+ * Pointer to the flow attributes.
+ * @param[in] items
+ * Pointer to the list of items.
+ * @param[in] actions
+ * Pointer to the list of actions.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_ernno is set.
+ */
+static int
+flow_tcf_validate(struct rte_eth_dev *dev,
+ const struct rte_flow_attr *attr,
+ const struct rte_flow_item items[],
+ const struct rte_flow_action actions[],
+ struct rte_flow_error *error)
+{
+ union {
+ const struct rte_flow_item_port_id *port_id;
+ const struct rte_flow_item_eth *eth;
+ const struct rte_flow_item_vlan *vlan;
+ const struct rte_flow_item_ipv4 *ipv4;
+ const struct rte_flow_item_ipv6 *ipv6;
+ const struct rte_flow_item_tcp *tcp;
+ const struct rte_flow_item_udp *udp;
+ } spec, mask;
+ union {
+ const struct rte_flow_action_port_id *port_id;
+ const struct rte_flow_action_of_push_vlan *of_push_vlan;
+ const struct rte_flow_action_of_set_vlan_vid *
+ of_set_vlan_vid;
+ const struct rte_flow_action_of_set_vlan_pcp *
+ of_set_vlan_pcp;
+ } conf;
+ uint32_t item_flags = 0;
+ uint32_t action_flags = 0;
+ uint8_t next_protocol = -1;
+ unsigned int tcm_ifindex = 0;
+ struct flow_tcf_ptoi ptoi[PTOI_TABLE_SZ_MAX(dev)];
+ bool in_port_id_set;
+ int ret;
+
+ claim_nonzero(flow_tcf_build_ptoi_table(dev, ptoi,
+ PTOI_TABLE_SZ_MAX(dev)));
+ ret = flow_tcf_validate_attributes(attr, error);
+ if (ret < 0)
+ return ret;
+ for (; items->type != RTE_FLOW_ITEM_TYPE_END; items++) {
+ unsigned int i;
+
+ switch (items->type) {
+ case RTE_FLOW_ITEM_TYPE_VOID:
+ break;
+ case RTE_FLOW_ITEM_TYPE_PORT_ID:
+ mask.port_id = flow_tcf_item_mask
+ (items, &rte_flow_item_port_id_mask,
+ &flow_tcf_mask_supported.port_id,
+ &flow_tcf_mask_empty.port_id,
+ sizeof(flow_tcf_mask_supported.port_id),
+ error);
+ if (!mask.port_id)
+ return -rte_errno;
+ if (mask.port_id == &flow_tcf_mask_empty.port_id) {
+ in_port_id_set = 1;
+ break;
+ }
+ spec.port_id = items->spec;
+ if (mask.port_id->id && mask.port_id->id != 0xffffffff)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK,
+ mask.port_id,
+ "no support for partial mask on"
+ " \"id\" field");
+ if (!mask.port_id->id)
+ i = 0;
+ else
+ for (i = 0; ptoi[i].ifindex; ++i)
+ if (ptoi[i].port_id == spec.port_id->id)
+ break;
+ if (!ptoi[i].ifindex)
+ return rte_flow_error_set
+ (error, ENODEV,
+ RTE_FLOW_ERROR_TYPE_ITEM_SPEC,
+ spec.port_id,
+ "missing data to convert port ID to"
+ " ifindex");
+ if (in_port_id_set && ptoi[i].ifindex != tcm_ifindex)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_SPEC,
+ spec.port_id,
+ "cannot match traffic for"
+ " several port IDs through"
+ " a single flow rule");
+ tcm_ifindex = ptoi[i].ifindex;
+ in_port_id_set = 1;
+ break;
+ case RTE_FLOW_ITEM_TYPE_ETH:
+ ret = mlx5_flow_validate_item_eth(items, item_flags,
+ error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_L2;
+ /* TODO:
+ * Redundant check due to different supported mask.
+ * Same for the rest of items.
+ */
+ mask.eth = flow_tcf_item_mask
+ (items, &rte_flow_item_eth_mask,
+ &flow_tcf_mask_supported.eth,
+ &flow_tcf_mask_empty.eth,
+ sizeof(flow_tcf_mask_supported.eth),
+ error);
+ if (!mask.eth)
+ return -rte_errno;
+ if (mask.eth->type && mask.eth->type !=
+ RTE_BE16(0xffff))
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK,
+ mask.eth,
+ "no support for partial mask on"
+ " \"type\" field");
+ break;
+ case RTE_FLOW_ITEM_TYPE_VLAN:
+ ret = mlx5_flow_validate_item_vlan(items, item_flags,
+ error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_VLAN;
+ mask.vlan = flow_tcf_item_mask
+ (items, &rte_flow_item_vlan_mask,
+ &flow_tcf_mask_supported.vlan,
+ &flow_tcf_mask_empty.vlan,
+ sizeof(flow_tcf_mask_supported.vlan),
+ error);
+ if (!mask.vlan)
+ return -rte_errno;
+ if ((mask.vlan->tci & RTE_BE16(0xe000) &&
+ (mask.vlan->tci & RTE_BE16(0xe000)) !=
+ RTE_BE16(0xe000)) ||
+ (mask.vlan->tci & RTE_BE16(0x0fff) &&
+ (mask.vlan->tci & RTE_BE16(0x0fff)) !=
+ RTE_BE16(0x0fff)) ||
+ (mask.vlan->inner_type &&
+ mask.vlan->inner_type != RTE_BE16(0xffff)))
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK,
+ mask.vlan,
+ "no support for partial masks on"
+ " \"tci\" (PCP and VID parts) and"
+ " \"inner_type\" fields");
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV4:
+ ret = mlx5_flow_validate_item_ipv4(items, item_flags,
+ error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_L3_IPV4;
+ mask.ipv4 = flow_tcf_item_mask
+ (items, &rte_flow_item_ipv4_mask,
+ &flow_tcf_mask_supported.ipv4,
+ &flow_tcf_mask_empty.ipv4,
+ sizeof(flow_tcf_mask_supported.ipv4),
+ error);
+ if (!mask.ipv4)
+ return -rte_errno;
+ if (mask.ipv4->hdr.next_proto_id &&
+ mask.ipv4->hdr.next_proto_id != 0xff)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK,
+ mask.ipv4,
+ "no support for partial mask on"
+ " \"hdr.next_proto_id\" field");
+ else if (mask.ipv4->hdr.next_proto_id)
+ next_protocol =
+ ((const struct rte_flow_item_ipv4 *)
+ (items->spec))->hdr.next_proto_id;
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV6:
+ ret = mlx5_flow_validate_item_ipv6(items, item_flags,
+ error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_L3_IPV6;
+ mask.ipv6 = flow_tcf_item_mask
+ (items, &rte_flow_item_ipv6_mask,
+ &flow_tcf_mask_supported.ipv6,
+ &flow_tcf_mask_empty.ipv6,
+ sizeof(flow_tcf_mask_supported.ipv6),
+ error);
+ if (!mask.ipv6)
+ return -rte_errno;
+ if (mask.ipv6->hdr.proto &&
+ mask.ipv6->hdr.proto != 0xff)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM_MASK,
+ mask.ipv6,
+ "no support for partial mask on"
+ " \"hdr.proto\" field");
+ else if (mask.ipv6->hdr.proto)
+ next_protocol =
+ ((const struct rte_flow_item_ipv6 *)
+ (items->spec))->hdr.proto;
+ break;
+ case RTE_FLOW_ITEM_TYPE_UDP:
+ ret = mlx5_flow_validate_item_udp(items, item_flags,
+ next_protocol, error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_L4_UDP;
+ mask.udp = flow_tcf_item_mask
+ (items, &rte_flow_item_udp_mask,
+ &flow_tcf_mask_supported.udp,
+ &flow_tcf_mask_empty.udp,
+ sizeof(flow_tcf_mask_supported.udp),
+ error);
+ if (!mask.udp)
+ return -rte_errno;
+ break;
+ case RTE_FLOW_ITEM_TYPE_TCP:
+ ret = mlx5_flow_validate_item_tcp(items, item_flags,
+ next_protocol, error);
+ if (ret < 0)
+ return ret;
+ item_flags |= MLX5_FLOW_LAYER_OUTER_L4_TCP;
+ mask.tcp = flow_tcf_item_mask
+ (items, &rte_flow_item_tcp_mask,
+ &flow_tcf_mask_supported.tcp,
+ &flow_tcf_mask_empty.tcp,
+ sizeof(flow_tcf_mask_supported.tcp),
+ error);
+ if (!mask.tcp)
+ return -rte_errno;
+ break;
+ default:
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM,
+ NULL, "item not supported");
+ }
+ }
+ for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
+ unsigned int i;
+
+ switch (actions->type) {
+ case RTE_FLOW_ACTION_TYPE_VOID:
+ break;
+ case RTE_FLOW_ACTION_TYPE_PORT_ID:
+ if (action_flags & MLX5_TCF_FATE_ACTIONS)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION, actions,
+ "can't have multiple fate actions");
+ conf.port_id = actions->conf;
+ if (conf.port_id->original)
+ i = 0;
+ else
+ for (i = 0; ptoi[i].ifindex; ++i)
+ if (ptoi[i].port_id == conf.port_id->id)
+ break;
+ if (!ptoi[i].ifindex)
+ return rte_flow_error_set
+ (error, ENODEV,
+ RTE_FLOW_ERROR_TYPE_ACTION_CONF,
+ conf.port_id,
+ "missing data to convert port ID to"
+ " ifindex");
+ action_flags |= MLX5_ACTION_PORT_ID;
+ break;
+ case RTE_FLOW_ACTION_TYPE_DROP:
+ if (action_flags & MLX5_TCF_FATE_ACTIONS)
+ return rte_flow_error_set
+ (error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION, actions,
+ "can't have multiple fate actions");
+ action_flags |= MLX5_ACTION_DROP;
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_POP_VLAN:
+ action_flags |= MLX5_ACTION_OF_POP_VLAN;
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
+ action_flags |= MLX5_ACTION_OF_PUSH_VLAN;
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
+ action_flags |= MLX5_ACTION_OF_SET_VLAN_VID;
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
+ action_flags |= MLX5_ACTION_OF_SET_VLAN_PCP;
+ break;
+ default:
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ actions,
+ "action not supported");
+ }
+ }
+ return 0;
+}
+
+/**
+ * Calculate maximum size of memory for flow items of Linux TC flower and
+ * extract specified items.
+ *
+ * @param[in] items
+ * Pointer to the list of items.
+ * @param[out] item_flags
+ * Pointer to the detected items.
+ *
+ * @return
+ * Maximum size of memory for items.
+ */
+static int
+flow_tcf_get_items_and_size(const struct rte_flow_item items[],
+ uint64_t *item_flags)
+{
+ int size = 0;
+ uint64_t flags = 0;
+
+ size += SZ_NLATTR_STRZ_OF("flower") +
+ SZ_NLATTR_NEST + /* TCA_OPTIONS. */
+ SZ_NLATTR_TYPE_OF(uint32_t); /* TCA_CLS_FLAGS_SKIP_SW. */
+ for (; items->type != RTE_FLOW_ITEM_TYPE_END; items++) {
+ switch (items->type) {
+ case RTE_FLOW_ITEM_TYPE_VOID:
+ break;
+ case RTE_FLOW_ITEM_TYPE_PORT_ID:
+ break;
+ case RTE_FLOW_ITEM_TYPE_ETH:
+ size += SZ_NLATTR_TYPE_OF(uint16_t) + /* Ether type. */
+ SZ_NLATTR_DATA_OF(ETHER_ADDR_LEN) * 4;
+ /* dst/src MAC addr and mask. */
+ flags |= MLX5_FLOW_LAYER_OUTER_L2;
+ break;
+ case RTE_FLOW_ITEM_TYPE_VLAN:
+ size += SZ_NLATTR_TYPE_OF(uint16_t) + /* Ether type. */
+ SZ_NLATTR_TYPE_OF(uint16_t) +
+ /* VLAN Ether type. */
+ SZ_NLATTR_TYPE_OF(uint8_t) + /* VLAN prio. */
+ SZ_NLATTR_TYPE_OF(uint16_t); /* VLAN ID. */
+ flags |= MLX5_FLOW_LAYER_OUTER_VLAN;
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV4:
+ size += SZ_NLATTR_TYPE_OF(uint16_t) + /* Ether type. */
+ SZ_NLATTR_TYPE_OF(uint8_t) + /* IP proto. */
+ SZ_NLATTR_TYPE_OF(uint32_t) * 4;
+ /* dst/src IP addr and mask. */
+ flags |= MLX5_FLOW_LAYER_OUTER_L3_IPV4;
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV6:
+ size += SZ_NLATTR_TYPE_OF(uint16_t) + /* Ether type. */
+ SZ_NLATTR_TYPE_OF(uint8_t) + /* IP proto. */
+ SZ_NLATTR_TYPE_OF(IPV6_ADDR_LEN) * 4;
+ /* dst/src IP addr and mask. */
+ flags |= MLX5_FLOW_LAYER_OUTER_L3_IPV6;
+ break;
+ case RTE_FLOW_ITEM_TYPE_UDP:
+ size += SZ_NLATTR_TYPE_OF(uint8_t) + /* IP proto. */
+ SZ_NLATTR_TYPE_OF(uint16_t) * 4;
+ /* dst/src port and mask. */
+ flags |= MLX5_FLOW_LAYER_OUTER_L4_UDP;
+ break;
+ case RTE_FLOW_ITEM_TYPE_TCP:
+ size += SZ_NLATTR_TYPE_OF(uint8_t) + /* IP proto. */
+ SZ_NLATTR_TYPE_OF(uint16_t) * 4;
+ /* dst/src port and mask. */
+ flags |= MLX5_FLOW_LAYER_OUTER_L4_TCP;
+ break;
+ default:
+ DRV_LOG(WARNING,
+ "unsupported item %p type %d,"
+ " items must be validated before flow creation",
+ (const void *)items, items->type);
+ break;
+ }
+ }
+ *item_flags = flags;
+ return size;
+}
+
+/**
+ * Calculate maximum size of memory for flow actions of Linux TC flower and
+ * extract specified actions.
+ *
+ * @param[in] actions
+ * Pointer to the list of actions.
+ * @param[out] action_flags
+ * Pointer to the detected actions.
+ *
+ * @return
+ * Maximum size of memory for actions.
+ */
+static int
+flow_tcf_get_actions_and_size(const struct rte_flow_action actions[],
+ uint64_t *action_flags)
+{
+ int size = 0;
+ uint64_t flags = 0;
+
+ size += SZ_NLATTR_NEST; /* TCA_FLOWER_ACT. */
+ for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
+ switch (actions->type) {
+ case RTE_FLOW_ACTION_TYPE_VOID:
+ break;
+ case RTE_FLOW_ACTION_TYPE_PORT_ID:
+ size += SZ_NLATTR_NEST + /* na_act_index. */
+ SZ_NLATTR_STRZ_OF("mirred") +
+ SZ_NLATTR_NEST + /* TCA_ACT_OPTIONS. */
+ SZ_NLATTR_TYPE_OF(struct tc_mirred);
+ flags |= MLX5_ACTION_PORT_ID;
+ break;
+ case RTE_FLOW_ACTION_TYPE_DROP:
+ size += SZ_NLATTR_NEST + /* na_act_index. */
+ SZ_NLATTR_STRZ_OF("gact") +
+ SZ_NLATTR_NEST + /* TCA_ACT_OPTIONS. */
+ SZ_NLATTR_TYPE_OF(struct tc_gact);
+ flags |= MLX5_ACTION_DROP;
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_POP_VLAN:
+ flags |= MLX5_ACTION_OF_POP_VLAN;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
+ flags |= MLX5_ACTION_OF_PUSH_VLAN;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
+ flags |= MLX5_ACTION_OF_SET_VLAN_VID;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
+ flags |= MLX5_ACTION_OF_SET_VLAN_PCP;
+ goto action_of_vlan;
+action_of_vlan:
+ size += SZ_NLATTR_NEST + /* na_act_index. */
+ SZ_NLATTR_STRZ_OF("vlan") +
+ SZ_NLATTR_NEST + /* TCA_ACT_OPTIONS. */
+ SZ_NLATTR_TYPE_OF(struct tc_vlan) +
+ SZ_NLATTR_TYPE_OF(uint16_t) +
+ /* VLAN protocol. */
+ SZ_NLATTR_TYPE_OF(uint16_t) + /* VLAN ID. */
+ SZ_NLATTR_TYPE_OF(uint8_t); /* VLAN prio. */
+ break;
+ default:
+ DRV_LOG(WARNING,
+ "unsupported action %p type %d,"
+ " items must be validated before flow creation",
+ (const void *)actions, actions->type);
+ break;
+ }
+ }
+ *action_flags = flags;
+ return size;
+}
+
+/**
+ * Brand rtnetlink buffer with unique handle.
+ *
+ * This handle should be unique for a given network interface to avoid
+ * collisions.
+ *
+ * @param nlh
+ * Pointer to Netlink message.
+ * @param handle
+ * Unique 32-bit handle to use.
+ */
+static void
+flow_tcf_nl_brand(struct nlmsghdr *nlh, uint32_t handle)
+{
+ struct tcmsg *tcm = mnl_nlmsg_get_payload(nlh);
+
+ tcm->tcm_handle = handle;
+ DRV_LOG(DEBUG, "Netlink msg %p is branded with handle %x",
+ (void *)nlh, handle);
+}
+
+/**
+ * Prepare a flow object for Linux TC flower. It calculates the maximum size of
+ * memory required, allocates the memory, initializes Netlink message headers
+ * and set unique TC message handle.
+ *
+ * @param[in] attr
+ * Pointer to the flow attributes.
+ * @param[in] items
+ * Pointer to the list of items.
+ * @param[in] actions
+ * Pointer to the list of actions.
+ * @param[out] item_flags
+ * Pointer to bit mask of all items detected.
+ * @param[out] action_flags
+ * Pointer to bit mask of all actions detected.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * Pointer to mlx5_flow object on success,
+ * otherwise NULL and rte_ernno is set.
+ */
+static struct mlx5_flow *
+flow_tcf_prepare(const struct rte_flow_attr *attr __rte_unused,
+ const struct rte_flow_item items[],
+ const struct rte_flow_action actions[],
+ uint64_t *item_flags, uint64_t *action_flags,
+ struct rte_flow_error *error)
+{
+ size_t size = sizeof(struct mlx5_flow) +
+ MNL_ALIGN(sizeof(struct nlmsghdr)) +
+ MNL_ALIGN(sizeof(struct tcmsg));
+ struct mlx5_flow *dev_flow;
+ struct nlmsghdr *nlh;
+ struct tcmsg *tcm;
+
+ size += flow_tcf_get_items_and_size(items, item_flags);
+ size += flow_tcf_get_actions_and_size(actions, action_flags);
+ dev_flow = rte_zmalloc(__func__, size, MNL_ALIGNTO);
+ if (!dev_flow) {
+ rte_flow_error_set(error, ENOMEM,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+ "not enough memory to create E-Switch flow");
+ return NULL;
+ }
+ nlh = mnl_nlmsg_put_header((void *)(dev_flow + 1));
+ tcm = mnl_nlmsg_put_extra_header(nlh, sizeof(*tcm));
+ *dev_flow = (struct mlx5_flow){
+ .tcf = (struct mlx5_flow_tcf){
+ .nlh = nlh,
+ .tcm = tcm,
+ },
+ };
+ /*
+ * Generate a reasonably unique handle based on the address of the
+ * target buffer.
+ *
+ * This is straightforward on 32-bit systems where the flow pointer can
+ * be used directly. Otherwise, its least significant part is taken
+ * after shifting it by the previous power of two of the pointed buffer
+ * size.
+ */
+ if (sizeof(dev_flow) <= 4)
+ flow_tcf_nl_brand(nlh, (uintptr_t)dev_flow);
+ else
+ flow_tcf_nl_brand(nlh, (uintptr_t)dev_flow >>
+ rte_log2_u32(rte_align32prevpow2(size)));
+ return dev_flow;
+}
+
+/**
+ * Translate flow for Linux TC flower and construct Netlink message.
+ *
+ * @param[in] priv
+ * Pointer to the priv structure.
+ * @param[in, out] flow
+ * Pointer to the sub flow.
+ * @param[in] attr
+ * Pointer to the flow attributes.
+ * @param[in] items
+ * Pointer to the list of items.
+ * @param[in] actions
+ * Pointer to the list of actions.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_ernno is set.
+ */
+static int
+flow_tcf_translate(struct rte_eth_dev *dev, struct mlx5_flow *dev_flow,
+ const struct rte_flow_attr *attr,
+ const struct rte_flow_item items[],
+ const struct rte_flow_action actions[],
+ struct rte_flow_error *error)
+{
+ union {
+ const struct rte_flow_item_port_id *port_id;
+ const struct rte_flow_item_eth *eth;
+ const struct rte_flow_item_vlan *vlan;
+ const struct rte_flow_item_ipv4 *ipv4;
+ const struct rte_flow_item_ipv6 *ipv6;
+ const struct rte_flow_item_tcp *tcp;
+ const struct rte_flow_item_udp *udp;
+ } spec, mask;
+ union {
+ const struct rte_flow_action_port_id *port_id;
+ const struct rte_flow_action_of_push_vlan *of_push_vlan;
+ const struct rte_flow_action_of_set_vlan_vid *
+ of_set_vlan_vid;
+ const struct rte_flow_action_of_set_vlan_pcp *
+ of_set_vlan_pcp;
+ } conf;
+ struct flow_tcf_ptoi ptoi[PTOI_TABLE_SZ_MAX(dev)];
+ struct nlmsghdr *nlh = dev_flow->tcf.nlh;
+ struct tcmsg *tcm = dev_flow->tcf.tcm;
+ uint32_t na_act_index_cur;
+ bool eth_type_set = 0;
+ bool vlan_present = 0;
+ bool vlan_eth_type_set = 0;
+ bool ip_proto_set = 0;
+ struct nlattr *na_flower;
+ struct nlattr *na_flower_act;
+ struct nlattr *na_vlan_id = NULL;
+ struct nlattr *na_vlan_priority = NULL;
+
+ claim_nonzero(flow_tcf_build_ptoi_table(dev, ptoi,
+ PTOI_TABLE_SZ_MAX(dev)));
+ nlh = dev_flow->tcf.nlh;
+ tcm = dev_flow->tcf.tcm;
+ /* Prepare API must have been called beforehand. */
+ assert(nlh != NULL && tcm != NULL);
+ tcm->tcm_family = AF_UNSPEC;
+ tcm->tcm_ifindex = ptoi[0].ifindex;
+ tcm->tcm_parent = TC_H_MAKE(TC_H_INGRESS, TC_H_MIN_INGRESS);
+ /*
+ * Priority cannot be zero to prevent the kernel from picking one
+ * automatically.
+ */
+ tcm->tcm_info = TC_H_MAKE((attr->priority + 1) << 16,
+ RTE_BE16(ETH_P_ALL));
+ mnl_attr_put_strz(nlh, TCA_KIND, "flower");
+ na_flower = mnl_attr_nest_start(nlh, TCA_OPTIONS);
+ mnl_attr_put_u32(nlh, TCA_FLOWER_FLAGS, TCA_CLS_FLAGS_SKIP_SW);
+ for (; items->type != RTE_FLOW_ITEM_TYPE_END; items++) {
+ unsigned int i;
+
+ switch (items->type) {
+ case RTE_FLOW_ITEM_TYPE_VOID:
+ break;
+ case RTE_FLOW_ITEM_TYPE_PORT_ID:
+ mask.port_id = flow_tcf_item_mask
+ (items, &rte_flow_item_port_id_mask,
+ &flow_tcf_mask_supported.port_id,
+ &flow_tcf_mask_empty.port_id,
+ sizeof(flow_tcf_mask_supported.port_id),
+ error);
+ assert(mask.port_id);
+ if (mask.port_id == &flow_tcf_mask_empty.port_id)
+ break;
+ spec.port_id = items->spec;
+ if (!mask.port_id->id)
+ i = 0;
+ else
+ for (i = 0; ptoi[i].ifindex; ++i)
+ if (ptoi[i].port_id == spec.port_id->id)
+ break;
+ assert(ptoi[i].ifindex);
+ tcm->tcm_ifindex = ptoi[i].ifindex;
+ break;
+ case RTE_FLOW_ITEM_TYPE_ETH:
+ mask.eth = flow_tcf_item_mask
+ (items, &rte_flow_item_eth_mask,
+ &flow_tcf_mask_supported.eth,
+ &flow_tcf_mask_empty.eth,
+ sizeof(flow_tcf_mask_supported.eth),
+ error);
+ assert(mask.eth);
+ if (mask.eth == &flow_tcf_mask_empty.eth)
+ break;
+ spec.eth = items->spec;
+ if (mask.eth->type) {
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_ETH_TYPE,
+ spec.eth->type);
+ eth_type_set = 1;
+ }
+ if (!is_zero_ether_addr(&mask.eth->dst)) {
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_ETH_DST,
+ ETHER_ADDR_LEN,
+ spec.eth->dst.addr_bytes);
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_ETH_DST_MASK,
+ ETHER_ADDR_LEN,
+ mask.eth->dst.addr_bytes);
+ }
+ if (!is_zero_ether_addr(&mask.eth->src)) {
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_ETH_SRC,
+ ETHER_ADDR_LEN,
+ spec.eth->src.addr_bytes);
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_ETH_SRC_MASK,
+ ETHER_ADDR_LEN,
+ mask.eth->src.addr_bytes);
+ }
+ break;
+ case RTE_FLOW_ITEM_TYPE_VLAN:
+ mask.vlan = flow_tcf_item_mask
+ (items, &rte_flow_item_vlan_mask,
+ &flow_tcf_mask_supported.vlan,
+ &flow_tcf_mask_empty.vlan,
+ sizeof(flow_tcf_mask_supported.vlan),
+ error);
+ assert(mask.vlan);
+ if (!eth_type_set)
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_ETH_TYPE,
+ RTE_BE16(ETH_P_8021Q));
+ eth_type_set = 1;
+ vlan_present = 1;
+ if (mask.vlan == &flow_tcf_mask_empty.vlan)
+ break;
+ spec.vlan = items->spec;
+ if (mask.vlan->inner_type) {
+ mnl_attr_put_u16(nlh,
+ TCA_FLOWER_KEY_VLAN_ETH_TYPE,
+ spec.vlan->inner_type);
+ vlan_eth_type_set = 1;
+ }
+ if (mask.vlan->tci & RTE_BE16(0xe000))
+ mnl_attr_put_u8(nlh, TCA_FLOWER_KEY_VLAN_PRIO,
+ (rte_be_to_cpu_16
+ (spec.vlan->tci) >> 13) & 0x7);
+ if (mask.vlan->tci & RTE_BE16(0x0fff))
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_VLAN_ID,
+ rte_be_to_cpu_16
+ (spec.vlan->tci &
+ RTE_BE16(0x0fff)));
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV4:
+ mask.ipv4 = flow_tcf_item_mask
+ (items, &rte_flow_item_ipv4_mask,
+ &flow_tcf_mask_supported.ipv4,
+ &flow_tcf_mask_empty.ipv4,
+ sizeof(flow_tcf_mask_supported.ipv4),
+ error);
+ assert(mask.ipv4);
+ if (!eth_type_set || !vlan_eth_type_set)
+ mnl_attr_put_u16(nlh,
+ vlan_present ?
+ TCA_FLOWER_KEY_VLAN_ETH_TYPE :
+ TCA_FLOWER_KEY_ETH_TYPE,
+ RTE_BE16(ETH_P_IP));
+ eth_type_set = 1;
+ vlan_eth_type_set = 1;
+ if (mask.ipv4 == &flow_tcf_mask_empty.ipv4)
+ break;
+ spec.ipv4 = items->spec;
+ if (mask.ipv4->hdr.next_proto_id) {
+ mnl_attr_put_u8(nlh, TCA_FLOWER_KEY_IP_PROTO,
+ spec.ipv4->hdr.next_proto_id);
+ ip_proto_set = 1;
+ }
+ if (mask.ipv4->hdr.src_addr) {
+ mnl_attr_put_u32(nlh, TCA_FLOWER_KEY_IPV4_SRC,
+ spec.ipv4->hdr.src_addr);
+ mnl_attr_put_u32(nlh,
+ TCA_FLOWER_KEY_IPV4_SRC_MASK,
+ mask.ipv4->hdr.src_addr);
+ }
+ if (mask.ipv4->hdr.dst_addr) {
+ mnl_attr_put_u32(nlh, TCA_FLOWER_KEY_IPV4_DST,
+ spec.ipv4->hdr.dst_addr);
+ mnl_attr_put_u32(nlh,
+ TCA_FLOWER_KEY_IPV4_DST_MASK,
+ mask.ipv4->hdr.dst_addr);
+ }
+ break;
+ case RTE_FLOW_ITEM_TYPE_IPV6:
+ mask.ipv6 = flow_tcf_item_mask
+ (items, &rte_flow_item_ipv6_mask,
+ &flow_tcf_mask_supported.ipv6,
+ &flow_tcf_mask_empty.ipv6,
+ sizeof(flow_tcf_mask_supported.ipv6),
+ error);
+ assert(mask.ipv6);
+ if (!eth_type_set || !vlan_eth_type_set)
+ mnl_attr_put_u16(nlh,
+ vlan_present ?
+ TCA_FLOWER_KEY_VLAN_ETH_TYPE :
+ TCA_FLOWER_KEY_ETH_TYPE,
+ RTE_BE16(ETH_P_IPV6));
+ eth_type_set = 1;
+ vlan_eth_type_set = 1;
+ if (mask.ipv6 == &flow_tcf_mask_empty.ipv6)
+ break;
+ spec.ipv6 = items->spec;
+ if (mask.ipv6->hdr.proto) {
+ mnl_attr_put_u8(nlh, TCA_FLOWER_KEY_IP_PROTO,
+ spec.ipv6->hdr.proto);
+ ip_proto_set = 1;
+ }
+ if (!IN6_IS_ADDR_UNSPECIFIED(mask.ipv6->hdr.src_addr)) {
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_IPV6_SRC,
+ sizeof(spec.ipv6->hdr.src_addr),
+ spec.ipv6->hdr.src_addr);
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_IPV6_SRC_MASK,
+ sizeof(mask.ipv6->hdr.src_addr),
+ mask.ipv6->hdr.src_addr);
+ }
+ if (!IN6_IS_ADDR_UNSPECIFIED(mask.ipv6->hdr.dst_addr)) {
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_IPV6_DST,
+ sizeof(spec.ipv6->hdr.dst_addr),
+ spec.ipv6->hdr.dst_addr);
+ mnl_attr_put(nlh, TCA_FLOWER_KEY_IPV6_DST_MASK,
+ sizeof(mask.ipv6->hdr.dst_addr),
+ mask.ipv6->hdr.dst_addr);
+ }
+ break;
+ case RTE_FLOW_ITEM_TYPE_UDP:
+ mask.udp = flow_tcf_item_mask
+ (items, &rte_flow_item_udp_mask,
+ &flow_tcf_mask_supported.udp,
+ &flow_tcf_mask_empty.udp,
+ sizeof(flow_tcf_mask_supported.udp),
+ error);
+ assert(mask.udp);
+ if (!ip_proto_set)
+ mnl_attr_put_u8(nlh, TCA_FLOWER_KEY_IP_PROTO,
+ IPPROTO_UDP);
+ if (mask.udp == &flow_tcf_mask_empty.udp)
+ break;
+ spec.udp = items->spec;
+ if (mask.udp->hdr.src_port) {
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_UDP_SRC,
+ spec.udp->hdr.src_port);
+ mnl_attr_put_u16(nlh,
+ TCA_FLOWER_KEY_UDP_SRC_MASK,
+ mask.udp->hdr.src_port);
+ }
+ if (mask.udp->hdr.dst_port) {
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_UDP_DST,
+ spec.udp->hdr.dst_port);
+ mnl_attr_put_u16(nlh,
+ TCA_FLOWER_KEY_UDP_DST_MASK,
+ mask.udp->hdr.dst_port);
+ }
+ break;
+ case RTE_FLOW_ITEM_TYPE_TCP:
+ mask.tcp = flow_tcf_item_mask
+ (items, &rte_flow_item_tcp_mask,
+ &flow_tcf_mask_supported.tcp,
+ &flow_tcf_mask_empty.tcp,
+ sizeof(flow_tcf_mask_supported.tcp),
+ error);
+ assert(mask.tcp);
+ if (!ip_proto_set)
+ mnl_attr_put_u8(nlh, TCA_FLOWER_KEY_IP_PROTO,
+ IPPROTO_TCP);
+ if (mask.tcp == &flow_tcf_mask_empty.tcp)
+ break;
+ spec.tcp = items->spec;
+ if (mask.tcp->hdr.src_port) {
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_TCP_SRC,
+ spec.tcp->hdr.src_port);
+ mnl_attr_put_u16(nlh,
+ TCA_FLOWER_KEY_TCP_SRC_MASK,
+ mask.tcp->hdr.src_port);
+ }
+ if (mask.tcp->hdr.dst_port) {
+ mnl_attr_put_u16(nlh, TCA_FLOWER_KEY_TCP_DST,
+ spec.tcp->hdr.dst_port);
+ mnl_attr_put_u16(nlh,
+ TCA_FLOWER_KEY_TCP_DST_MASK,
+ mask.tcp->hdr.dst_port);
+ }
+ break;
+ default:
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ITEM,
+ NULL, "item not supported");
+ }
+ }
+ na_flower_act = mnl_attr_nest_start(nlh, TCA_FLOWER_ACT);
+ na_act_index_cur = 1;
+ for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
+ struct nlattr *na_act_index;
+ struct nlattr *na_act;
+ unsigned int vlan_act;
+ unsigned int i;
+
+ switch (actions->type) {
+ case RTE_FLOW_ACTION_TYPE_VOID:
+ break;
+ case RTE_FLOW_ACTION_TYPE_PORT_ID:
+ conf.port_id = actions->conf;
+ if (conf.port_id->original)
+ i = 0;
+ else
+ for (i = 0; ptoi[i].ifindex; ++i)
+ if (ptoi[i].port_id == conf.port_id->id)
+ break;
+ assert(ptoi[i].ifindex);
+ na_act_index =
+ mnl_attr_nest_start(nlh, na_act_index_cur++);
+ assert(na_act_index);
+ mnl_attr_put_strz(nlh, TCA_ACT_KIND, "mirred");
+ na_act = mnl_attr_nest_start(nlh, TCA_ACT_OPTIONS);
+ assert(na_act);
+ mnl_attr_put(nlh, TCA_MIRRED_PARMS,
+ sizeof(struct tc_mirred),
+ &(struct tc_mirred){
+ .action = TC_ACT_STOLEN,
+ .eaction = TCA_EGRESS_REDIR,
+ .ifindex = ptoi[i].ifindex,
+ });
+ mnl_attr_nest_end(nlh, na_act);
+ mnl_attr_nest_end(nlh, na_act_index);
+ break;
+ case RTE_FLOW_ACTION_TYPE_DROP:
+ na_act_index =
+ mnl_attr_nest_start(nlh, na_act_index_cur++);
+ assert(na_act_index);
+ mnl_attr_put_strz(nlh, TCA_ACT_KIND, "gact");
+ na_act = mnl_attr_nest_start(nlh, TCA_ACT_OPTIONS);
+ assert(na_act);
+ mnl_attr_put(nlh, TCA_GACT_PARMS,
+ sizeof(struct tc_gact),
+ &(struct tc_gact){
+ .action = TC_ACT_SHOT,
+ });
+ mnl_attr_nest_end(nlh, na_act);
+ mnl_attr_nest_end(nlh, na_act_index);
+ break;
+ case RTE_FLOW_ACTION_TYPE_OF_POP_VLAN:
+ conf.of_push_vlan = NULL;
+ vlan_act = TCA_VLAN_ACT_POP;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
+ conf.of_push_vlan = actions->conf;
+ vlan_act = TCA_VLAN_ACT_PUSH;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
+ conf.of_set_vlan_vid = actions->conf;
+ if (na_vlan_id)
+ goto override_na_vlan_id;
+ vlan_act = TCA_VLAN_ACT_MODIFY;
+ goto action_of_vlan;
+ case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
+ conf.of_set_vlan_pcp = actions->conf;
+ if (na_vlan_priority)
+ goto override_na_vlan_priority;
+ vlan_act = TCA_VLAN_ACT_MODIFY;
+ goto action_of_vlan;
+action_of_vlan:
+ na_act_index =
+ mnl_attr_nest_start(nlh, na_act_index_cur++);
+ assert(na_act_index);
+ mnl_attr_put_strz(nlh, TCA_ACT_KIND, "vlan");
+ na_act = mnl_attr_nest_start(nlh, TCA_ACT_OPTIONS);
+ assert(na_act);
+ mnl_attr_put(nlh, TCA_VLAN_PARMS,
+ sizeof(struct tc_vlan),
+ &(struct tc_vlan){
+ .action = TC_ACT_PIPE,
+ .v_action = vlan_act,
+ });
+ if (vlan_act == TCA_VLAN_ACT_POP) {
+ mnl_attr_nest_end(nlh, na_act);
+ mnl_attr_nest_end(nlh, na_act_index);
+ break;
+ }
+ if (vlan_act == TCA_VLAN_ACT_PUSH)
+ mnl_attr_put_u16(nlh,
+ TCA_VLAN_PUSH_VLAN_PROTOCOL,
+ conf.of_push_vlan->ethertype);
+ na_vlan_id = mnl_nlmsg_get_payload_tail(nlh);
+ mnl_attr_put_u16(nlh, TCA_VLAN_PAD, 0);
+ na_vlan_priority = mnl_nlmsg_get_payload_tail(nlh);
+ mnl_attr_put_u8(nlh, TCA_VLAN_PAD, 0);
+ mnl_attr_nest_end(nlh, na_act);
+ mnl_attr_nest_end(nlh, na_act_index);
+ if (actions->type ==
+ RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID) {
+override_na_vlan_id:
+ na_vlan_id->nla_type = TCA_VLAN_PUSH_VLAN_ID;
+ *(uint16_t *)mnl_attr_get_payload(na_vlan_id) =
+ rte_be_to_cpu_16
+ (conf.of_set_vlan_vid->vlan_vid);
+ } else if (actions->type ==
+ RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP) {
+override_na_vlan_priority:
+ na_vlan_priority->nla_type =
+ TCA_VLAN_PUSH_VLAN_PRIORITY;
+ *(uint8_t *)mnl_attr_get_payload
+ (na_vlan_priority) =
+ conf.of_set_vlan_pcp->vlan_pcp;
+ }
+ break;
+ default:
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION,
+ actions,
+ "action not supported");
+ }
+ }
+ assert(na_flower);
+ assert(na_flower_act);
+ mnl_attr_nest_end(nlh, na_flower_act);
+ mnl_attr_nest_end(nlh, na_flower);
+ return 0;
+}
+
+/**
+ * Send Netlink message with acknowledgment.
+ *
+ * @param nl
+ * Libmnl socket to use.
+ * @param nlh
+ * Message to send. This function always raises the NLM_F_ACK flag before
+ * sending.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_tcf_nl_ack(struct mnl_socket *nl, struct nlmsghdr *nlh)
+{
+ alignas(struct nlmsghdr)
+ uint8_t ans[mnl_nlmsg_size(sizeof(struct nlmsgerr)) +
+ nlh->nlmsg_len - sizeof(*nlh)];
+ uint32_t seq = random();
+ int ret;
+
+ nlh->nlmsg_flags |= NLM_F_ACK;
+ nlh->nlmsg_seq = seq;
+ ret = mnl_socket_sendto(nl, nlh, nlh->nlmsg_len);
+ if (ret != -1)
+ ret = mnl_socket_recvfrom(nl, ans, sizeof(ans));
+ if (ret != -1)
+ ret = mnl_cb_run
+ (ans, ret, seq, mnl_socket_get_portid(nl), NULL, NULL);
+ if (ret > 0)
+ return 0;
+ rte_errno = errno;
+ return -rte_errno;
+}
+
+/**
+ * Apply flow to E-Switch by sending Netlink message.
+ *
+ * @param[in] dev
+ * Pointer to Ethernet device.
+ * @param[in, out] flow
+ * Pointer to the sub flow.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_ernno is set.
+ */
+static int
+flow_tcf_apply(struct rte_eth_dev *dev, struct rte_flow *flow,
+ struct rte_flow_error *error)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct mnl_socket *nl = priv->mnl_socket;
+ struct mlx5_flow *dev_flow;
+ struct nlmsghdr *nlh;
+
+ dev_flow = LIST_FIRST(&flow->dev_flows);
+ /* E-Switch flow can't be expanded. */
+ assert(!LIST_NEXT(dev_flow, next));
+ nlh = dev_flow->tcf.nlh;
+ nlh->nlmsg_type = RTM_NEWTFILTER;
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
+ if (!flow_tcf_nl_ack(nl, nlh))
+ return 0;
+ return rte_flow_error_set(error, rte_errno,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+ "netlink: failed to create TC flow rule");
+}
+
+/**
+ * Remove flow from E-Switch by sending Netlink message.
+ *
+ * @param[in] dev
+ * Pointer to Ethernet device.
+ * @param[in, out] flow
+ * Pointer to the sub flow.
+ */
+static void
+flow_tcf_remove(struct rte_eth_dev *dev, struct rte_flow *flow)
+{
+ struct priv *priv = dev->data->dev_private;
+ struct mnl_socket *nl = priv->mnl_socket;
+ struct mlx5_flow *dev_flow;
+ struct nlmsghdr *nlh;
+
+ if (!flow)
+ return;
+ dev_flow = LIST_FIRST(&flow->dev_flows);
+ if (!dev_flow)
+ return;
+ /* E-Switch flow can't be expanded. */
+ assert(!LIST_NEXT(dev_flow, next));
+ nlh = dev_flow->tcf.nlh;
+ nlh->nlmsg_type = RTM_DELTFILTER;
+ nlh->nlmsg_flags = NLM_F_REQUEST;
+ flow_tcf_nl_ack(nl, nlh);
+}
+
+/**
+ * Remove flow from E-Switch and release resources of the device flow.
+ *
+ * @param[in] dev
+ * Pointer to Ethernet device.
+ * @param[in, out] flow
+ * Pointer to the sub flow.
+ */
+static void
+flow_tcf_destroy(struct rte_eth_dev *dev, struct rte_flow *flow)
+{
+ struct mlx5_flow *dev_flow;
+
+ if (!flow)
+ return;
+ flow_tcf_remove(dev, flow);
+ dev_flow = LIST_FIRST(&flow->dev_flows);
+ if (!dev_flow)
+ return;
+ /* E-Switch flow can't be expanded. */
+ assert(!LIST_NEXT(dev_flow, next));
+ LIST_REMOVE(dev_flow, next);
+ rte_free(dev_flow);
+}
+
+const struct mlx5_flow_driver_ops mlx5_flow_tcf_drv_ops = {
+ .validate = flow_tcf_validate,
+ .prepare = flow_tcf_prepare,
+ .translate = flow_tcf_translate,
+ .apply = flow_tcf_apply,
+ .remove = flow_tcf_remove,
+ .destroy = flow_tcf_destroy,
+};
+
+/**
+ * Initialize ingress qdisc of a given network interface.
+ *
+ * @param nl
+ * Libmnl socket of the @p NETLINK_ROUTE kind.
+ * @param ifindex
+ * Index of network interface to initialize.
+ * @param[out] error
+ * Perform verbose error reporting if not NULL.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx5_flow_tcf_init(struct mnl_socket *nl, unsigned int ifindex,
+ struct rte_flow_error *error)
+{
+ struct nlmsghdr *nlh;
+ struct tcmsg *tcm;
+ alignas(struct nlmsghdr)
+ uint8_t buf[mnl_nlmsg_size(sizeof(*tcm) + 128)];
+
+ /* Destroy existing ingress qdisc and everything attached to it. */
+ nlh = mnl_nlmsg_put_header(buf);
+ nlh->nlmsg_type = RTM_DELQDISC;
+ nlh->nlmsg_flags = NLM_F_REQUEST;
+ tcm = mnl_nlmsg_put_extra_header(nlh, sizeof(*tcm));
+ tcm->tcm_family = AF_UNSPEC;
+ tcm->tcm_ifindex = ifindex;
+ tcm->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
+ tcm->tcm_parent = TC_H_INGRESS;
+ /* Ignore errors when qdisc is already absent. */
+ if (flow_tcf_nl_ack(nl, nlh) &&
+ rte_errno != EINVAL && rte_errno != ENOENT)
+ return rte_flow_error_set(error, rte_errno,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+ "netlink: failed to remove ingress"
+ " qdisc");
+ /* Create fresh ingress qdisc. */
+ nlh = mnl_nlmsg_put_header(buf);
+ nlh->nlmsg_type = RTM_NEWQDISC;
+ nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
+ tcm = mnl_nlmsg_put_extra_header(nlh, sizeof(*tcm));
+ tcm->tcm_family = AF_UNSPEC;
+ tcm->tcm_ifindex = ifindex;
+ tcm->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0);
+ tcm->tcm_parent = TC_H_INGRESS;
+ mnl_attr_put_strz_check(nlh, sizeof(buf), TCA_KIND, "ingress");
+ if (flow_tcf_nl_ack(nl, nlh))
+ return rte_flow_error_set(error, rte_errno,
+ RTE_FLOW_ERROR_TYPE_UNSPECIFIED, NULL,
+ "netlink: failed to create ingress"
+ " qdisc");
+ return 0;
+}
+
+/**
+ * Create and configure a libmnl socket for Netlink flow rules.
+ *
+ * @return
+ * A valid libmnl socket object pointer on success, NULL otherwise and
+ * rte_errno is set.
+ */
+struct mnl_socket *
+mlx5_flow_tcf_socket_create(void)
+{
+ struct mnl_socket *nl = mnl_socket_open(NETLINK_ROUTE);
+
+ if (nl) {
+ mnl_socket_setsockopt(nl, NETLINK_CAP_ACK, &(int){ 1 },
+ sizeof(int));
+ if (!mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID))
+ return nl;
+ }
+ rte_errno = errno;
+ if (nl)
+ mnl_socket_close(nl);
+ return NULL;
+}
+
+/**
+ * Destroy a libmnl socket.
+ *
+ * @param nl
+ * Libmnl socket of the @p NETLINK_ROUTE kind.
+ */
+void
+mlx5_flow_tcf_socket_destroy(struct mnl_socket *nl)
+{
+ mnl_socket_close(nl);
+}