close(priv->nl_socket_route);
if (priv->nl_socket_rdma >= 0)
close(priv->nl_socket_rdma);
+ if (priv->mnl_socket)
+ mlx5_nl_flow_socket_destroy(priv->mnl_socket);
ret = mlx5_hrxq_ibv_verify(dev);
if (ret)
DRV_LOG(WARNING, "port %u some hash Rx queue still remain",
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_nl_flow_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_nl_flow_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_nl_flow_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 */
close(priv->nl_socket_route);
if (priv->nl_socket_rdma >= 0)
close(priv->nl_socket_rdma);
+ if (priv->mnl_socket)
+ mlx5_nl_flow_socket_destroy(priv->mnl_socket);
if (own_domain_id)
claim_zero(rte_eth_switch_domain_free(priv->domain_id));
rte_free(priv);
struct mlx5_rxq_ibv *rxq; /* Verbs Rx queue. */
};
+struct mnl_socket;
+
struct priv {
LIST_ENTRY(priv) mem_event_cb; /* Called by memory event callback. */
struct rte_eth_dev_data *dev_data; /* Pointer to device data. */
rte_spinlock_t uar_lock[MLX5_UAR_PAGE_NUM_MAX];
/* UAR same-page access control required in 32bit implementations. */
#endif
+ struct mnl_socket *mnl_socket; /* Libmnl socket. */
};
#define PORT_ID(priv) ((priv)->dev_data->port_id)
int mlx5_nl_switch_info(int nl, unsigned int ifindex,
struct mlx5_switch_info *info);
+/* mlx5_nl_flow.c */
+
+int mlx5_nl_flow_init(struct mnl_socket *nl, unsigned int ifindex,
+ struct rte_flow_error *error);
+struct mnl_socket *mlx5_nl_flow_socket_create(void);
+void mlx5_nl_flow_socket_destroy(struct mnl_socket *nl);
+
#endif /* RTE_PMD_MLX5_H_ */
--- /dev/null
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2018 6WIND S.A.
+ * Copyright 2018 Mellanox Technologies, Ltd
+ */
+
+#include <errno.h>
+#include <libmnl/libmnl.h>
+#include <linux/netlink.h>
+#include <linux/pkt_sched.h>
+#include <linux/rtnetlink.h>
+#include <stdalign.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+
+#include <rte_errno.h>
+#include <rte_flow.h>
+
+#include "mlx5.h"
+
+/* Normally found in linux/netlink.h. */
+#ifndef NETLINK_CAP_ACK
+#define NETLINK_CAP_ACK 10
+#endif
+
+/**
+ * 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
+mlx5_nl_flow_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)
+ return 0;
+ rte_errno = errno;
+ return -rte_errno;
+}
+
+/**
+ * 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_nl_flow_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 (mlx5_nl_flow_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 (mlx5_nl_flow_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_nl_flow_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.
+ */
+void
+mlx5_nl_flow_socket_destroy(struct mnl_socket *nl)
+{
+ mnl_socket_close(nl);
+}
git.droids-corp.org / dpdk.git / commitdiff