Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 434 insertions, 0 deletions

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
new file mode 100644
index 000000000..35fa1ca98
--- /dev/null
+++ b/drivers/net/netdevsim/netdev.c
@@ -0,0 +1,434 @@
+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/etherdevice.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+#include <net/netlink.h>
+#include <net/pkt_cls.h>
+#include <net/rtnetlink.h>
+#include <net/udp_tunnel.h>
+
+#include "netdevsim.h"
+
+static netdev_tx_t nsim_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	if (!nsim_ipsec_tx(ns, skb))
+		goto out;
+
+	u64_stats_update_begin(&ns->syncp);
+	ns->tx_packets++;
+	ns->tx_bytes += skb->len;
+	u64_stats_update_end(&ns->syncp);
+
+out:
+	dev_kfree_skb(skb);
+
+	return NETDEV_TX_OK;
+}
+
+static void nsim_set_rx_mode(struct net_device *dev)
+{
+}
+
+static int nsim_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	if (ns->xdp.prog && new_mtu > NSIM_XDP_MAX_MTU)
+		return -EBUSY;
+
+	dev->mtu = new_mtu;
+
+	return 0;
+}
+
+static void
+nsim_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	unsigned int start;
+
+	do {
+		start = u64_stats_fetch_begin(&ns->syncp);
+		stats->tx_bytes = ns->tx_bytes;
+		stats->tx_packets = ns->tx_packets;
+	} while (u64_stats_fetch_retry(&ns->syncp, start));
+}
+
+static int
+nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
+{
+	return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
+}
+
+static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	/* Only refuse multicast addresses, zero address can mean unset/any. */
+	if (vf >= nsim_dev_get_vfs(nsim_dev) || is_multicast_ether_addr(mac))
+		return -EINVAL;
+	memcpy(nsim_dev->vfconfigs[vf].vf_mac, mac, ETH_ALEN);
+
+	return 0;
+}
+
+static int nsim_set_vf_vlan(struct net_device *dev, int vf,
+			    u16 vlan, u8 qos, __be16 vlan_proto)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev) || vlan > 4095 || qos > 7)
+		return -EINVAL;
+
+	nsim_dev->vfconfigs[vf].vlan = vlan;
+	nsim_dev->vfconfigs[vf].qos = qos;
+	nsim_dev->vfconfigs[vf].vlan_proto = vlan_proto;
+
+	return 0;
+}
+
+static int nsim_set_vf_rate(struct net_device *dev, int vf, int min, int max)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (nsim_esw_mode_is_switchdev(ns->nsim_dev)) {
+		pr_err("Not supported in switchdev mode. Please use devlink API.\n");
+		return -EOPNOTSUPP;
+	}
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+
+	nsim_dev->vfconfigs[vf].min_tx_rate = min;
+	nsim_dev->vfconfigs[vf].max_tx_rate = max;
+
+	return 0;
+}
+
+static int nsim_set_vf_spoofchk(struct net_device *dev, int vf, bool val)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+	nsim_dev->vfconfigs[vf].spoofchk_enabled = val;
+
+	return 0;
+}
+
+static int nsim_set_vf_rss_query_en(struct net_device *dev, int vf, bool val)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+	nsim_dev->vfconfigs[vf].rss_query_enabled = val;
+
+	return 0;
+}
+
+static int nsim_set_vf_trust(struct net_device *dev, int vf, bool val)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+	nsim_dev->vfconfigs[vf].trusted = val;
+
+	return 0;
+}
+
+static int
+nsim_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivi)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+
+	ivi->vf = vf;
+	ivi->linkstate = nsim_dev->vfconfigs[vf].link_state;
+	ivi->min_tx_rate = nsim_dev->vfconfigs[vf].min_tx_rate;
+	ivi->max_tx_rate = nsim_dev->vfconfigs[vf].max_tx_rate;
+	ivi->vlan = nsim_dev->vfconfigs[vf].vlan;
+	ivi->vlan_proto = nsim_dev->vfconfigs[vf].vlan_proto;
+	ivi->qos = nsim_dev->vfconfigs[vf].qos;
+	memcpy(&ivi->mac, nsim_dev->vfconfigs[vf].vf_mac, ETH_ALEN);
+	ivi->spoofchk = nsim_dev->vfconfigs[vf].spoofchk_enabled;
+	ivi->trusted = nsim_dev->vfconfigs[vf].trusted;
+	ivi->rss_query_en = nsim_dev->vfconfigs[vf].rss_query_enabled;
+
+	return 0;
+}
+
+static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+	struct nsim_dev *nsim_dev = ns->nsim_dev;
+
+	if (vf >= nsim_dev_get_vfs(nsim_dev))
+		return -EINVAL;
+
+	switch (state) {
+	case IFLA_VF_LINK_STATE_AUTO:
+	case IFLA_VF_LINK_STATE_ENABLE:
+	case IFLA_VF_LINK_STATE_DISABLE:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	nsim_dev->vfconfigs[vf].link_state = state;
+
+	return 0;
+}
+
+static LIST_HEAD(nsim_block_cb_list);
+
+static int
+nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	switch (type) {
+	case TC_SETUP_BLOCK:
+		return flow_block_cb_setup_simple(type_data,
+						  &nsim_block_cb_list,
+						  nsim_setup_tc_block_cb,
+						  ns, ns, true);
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int
+nsim_set_features(struct net_device *dev, netdev_features_t features)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	if ((dev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC))
+		return nsim_bpf_disable_tc(ns);
+
+	return 0;
+}
+
+static const struct net_device_ops nsim_netdev_ops = {
+	.ndo_start_xmit		= nsim_start_xmit,
+	.ndo_set_rx_mode	= nsim_set_rx_mode,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= nsim_change_mtu,
+	.ndo_get_stats64	= nsim_get_stats64,
+	.ndo_set_vf_mac		= nsim_set_vf_mac,
+	.ndo_set_vf_vlan	= nsim_set_vf_vlan,
+	.ndo_set_vf_rate	= nsim_set_vf_rate,
+	.ndo_set_vf_spoofchk	= nsim_set_vf_spoofchk,
+	.ndo_set_vf_trust	= nsim_set_vf_trust,
+	.ndo_get_vf_config	= nsim_get_vf_config,
+	.ndo_set_vf_link_state	= nsim_set_vf_link_state,
+	.ndo_set_vf_rss_query_en = nsim_set_vf_rss_query_en,
+	.ndo_setup_tc		= nsim_setup_tc,
+	.ndo_set_features	= nsim_set_features,
+	.ndo_bpf		= nsim_bpf,
+};
+
+static const struct net_device_ops nsim_vf_netdev_ops = {
+	.ndo_start_xmit		= nsim_start_xmit,
+	.ndo_set_rx_mode	= nsim_set_rx_mode,
+	.ndo_set_mac_address	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+	.ndo_change_mtu		= nsim_change_mtu,
+	.ndo_get_stats64	= nsim_get_stats64,
+	.ndo_setup_tc		= nsim_setup_tc,
+	.ndo_set_features	= nsim_set_features,
+};
+
+static void nsim_setup(struct net_device *dev)
+{
+	ether_setup(dev);
+	eth_hw_addr_random(dev);
+
+	dev->tx_queue_len = 0;
+	dev->flags |= IFF_NOARP;
+	dev->flags &= ~IFF_MULTICAST;
+	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE |
+			   IFF_NO_QUEUE;
+	dev->features |= NETIF_F_HIGHDMA |
+			 NETIF_F_SG |
+			 NETIF_F_FRAGLIST |
+			 NETIF_F_HW_CSUM |
+			 NETIF_F_TSO;
+	dev->hw_features |= NETIF_F_HW_TC;
+	dev->max_mtu = ETH_MAX_MTU;
+	dev->xdp_features = NETDEV_XDP_ACT_HW_OFFLOAD;
+}
+
+static int nsim_init_netdevsim(struct netdevsim *ns)
+{
+	int err;
+
+	ns->netdev->netdev_ops = &nsim_netdev_ops;
+
+	err = nsim_udp_tunnels_info_create(ns->nsim_dev, ns->netdev);
+	if (err)
+		return err;
+
+	rtnl_lock();
+	err = nsim_bpf_init(ns);
+	if (err)
+		goto err_utn_destroy;
+
+	nsim_ipsec_init(ns);
+
+	err = register_netdevice(ns->netdev);
+	if (err)
+		goto err_ipsec_teardown;
+	rtnl_unlock();
+	return 0;
+
+err_ipsec_teardown:
+	nsim_ipsec_teardown(ns);
+	nsim_bpf_uninit(ns);
+err_utn_destroy:
+	rtnl_unlock();
+	nsim_udp_tunnels_info_destroy(ns->netdev);
+	return err;
+}
+
+static int nsim_init_netdevsim_vf(struct netdevsim *ns)
+{
+	int err;
+
+	ns->netdev->netdev_ops = &nsim_vf_netdev_ops;
+	rtnl_lock();
+	err = register_netdevice(ns->netdev);
+	rtnl_unlock();
+	return err;
+}
+
+struct netdevsim *
+nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port)
+{
+	struct net_device *dev;
+	struct netdevsim *ns;
+	int err;
+
+	dev = alloc_netdev_mq(sizeof(*ns), "eth%d", NET_NAME_UNKNOWN, nsim_setup,
+			      nsim_dev->nsim_bus_dev->num_queues);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	dev_net_set(dev, nsim_dev_net(nsim_dev));
+	ns = netdev_priv(dev);
+	ns->netdev = dev;
+	u64_stats_init(&ns->syncp);
+	ns->nsim_dev = nsim_dev;
+	ns->nsim_dev_port = nsim_dev_port;
+	ns->nsim_bus_dev = nsim_dev->nsim_bus_dev;
+	SET_NETDEV_DEV(dev, &ns->nsim_bus_dev->dev);
+	SET_NETDEV_DEVLINK_PORT(dev, &nsim_dev_port->devlink_port);
+	nsim_ethtool_init(ns);
+	if (nsim_dev_port_is_pf(nsim_dev_port))
+		err = nsim_init_netdevsim(ns);
+	else
+		err = nsim_init_netdevsim_vf(ns);
+	if (err)
+		goto err_free_netdev;
+	return ns;
+
+err_free_netdev:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+
+void nsim_destroy(struct netdevsim *ns)
+{
+	struct net_device *dev = ns->netdev;
+
+	rtnl_lock();
+	unregister_netdevice(dev);
+	if (nsim_dev_port_is_pf(ns->nsim_dev_port)) {
+		nsim_ipsec_teardown(ns);
+		nsim_bpf_uninit(ns);
+	}
+	rtnl_unlock();
+	if (nsim_dev_port_is_pf(ns->nsim_dev_port))
+		nsim_udp_tunnels_info_destroy(dev);
+	free_netdev(dev);
+}
+
+static int nsim_validate(struct nlattr *tb[], struct nlattr *data[],
+			 struct netlink_ext_ack *extack)
+{
+	NL_SET_ERR_MSG_MOD(extack,
+			   "Please use: echo \"[ID] [PORT_COUNT] [NUM_QUEUES]\" > /sys/bus/netdevsim/new_device");
+	return -EOPNOTSUPP;
+}
+
+static struct rtnl_link_ops nsim_link_ops __read_mostly = {
+	.kind		= DRV_NAME,
+	.validate	= nsim_validate,
+};
+
+static int __init nsim_module_init(void)
+{
+	int err;
+
+	err = nsim_dev_init();
+	if (err)
+		return err;
+
+	err = nsim_bus_init();
+	if (err)
+		goto err_dev_exit;
+
+	err = rtnl_link_register(&nsim_link_ops);
+	if (err)
+		goto err_bus_exit;
+
+	return 0;
+
+err_bus_exit:
+	nsim_bus_exit();
+err_dev_exit:
+	nsim_dev_exit();
+	return err;
+}
+
+static void __exit nsim_module_exit(void)
+{
+	rtnl_link_unregister(&nsim_link_ops);
+	nsim_bus_exit();
+	nsim_dev_exit();
+}
+
+module_init(nsim_module_init);
+module_exit(nsim_module_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_RTNL_LINK(DRV_NAME);