drivers/net/netdevsim/netdevsim.h - linux - Git at Google

 /*
  * 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/device.h>
 #include <linux/ethtool.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/netdevice.h>
 #include <linux/u64_stats_sync.h>
 #include <net/devlink.h>
 #include <net/udp_tunnel.h>
 #include <net/xdp.h>

 #define DRV_NAME	"netdevsim"

 #define NSIM_XDP_MAX_MTU	4000

 #define NSIM_EA(extack, msg)	NL_SET_ERR_MSG_MOD((extack), msg)

 #define NSIM_IPSEC_MAX_SA_COUNT		33
 #define NSIM_IPSEC_VALID		BIT(31)
 #define NSIM_UDP_TUNNEL_N_PORTS		4

 struct nsim_sa {
 	struct xfrm_state *xs;
 	__be32 ipaddr[4];
 	u32 key[4];
 	u32 salt;
 	bool used;
 	bool crypt;
 	bool rx;
 };

 struct nsim_ipsec {
 	struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
 	struct dentry *pfile;
 	u32 count;
 	u32 tx;
 	u32 ok;
 };

 struct nsim_ethtool_pauseparam {
 	bool rx;
 	bool tx;
 	bool report_stats_rx;
 	bool report_stats_tx;
 };

 struct nsim_ethtool {
 	u32 get_err;
 	u32 set_err;
 	struct nsim_ethtool_pauseparam pauseparam;
 	struct ethtool_coalesce coalesce;
 	struct ethtool_ringparam ring;
 	struct ethtool_fecparam fec;
 };

 struct netdevsim {
 	struct net_device *netdev;
 	struct nsim_dev *nsim_dev;
 	struct nsim_dev_port *nsim_dev_port;

 	u64 tx_packets;
 	u64 tx_bytes;
 	struct u64_stats_sync syncp;

 	struct nsim_bus_dev *nsim_bus_dev;

 	struct bpf_prog	*bpf_offloaded;
 	u32 bpf_offloaded_id;

 	struct xdp_attachment_info xdp;
 	struct xdp_attachment_info xdp_hw;

 	bool bpf_tc_accept;
 	bool bpf_tc_non_bound_accept;
 	bool bpf_xdpdrv_accept;
 	bool bpf_xdpoffload_accept;

 	bool bpf_map_accept;
 	struct nsim_ipsec ipsec;
 	struct {
 		u32 inject_error;
 		u32 sleep;
 		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
 		u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
 		struct debugfs_u32_array dfs_ports[2];
 	} udp_ports;

 	struct nsim_ethtool ethtool;
 };

 struct netdevsim *
 nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
 void nsim_destroy(struct netdevsim *ns);

 void nsim_ethtool_init(struct netdevsim *ns);

 void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
 int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
 				 struct net_device *dev);
 void nsim_udp_tunnels_info_destroy(struct net_device *dev);

 #ifdef CONFIG_BPF_SYSCALL
 int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
 void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
 int nsim_bpf_init(struct netdevsim *ns);
 void nsim_bpf_uninit(struct netdevsim *ns);
 int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
 int nsim_bpf_disable_tc(struct netdevsim *ns);
 int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
 			       void *type_data, void *cb_priv);
 #else

 static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
 {
 	return 0;
 }

 static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
 {
 }
 static inline int nsim_bpf_init(struct netdevsim *ns)
 {
 	return 0;
 }

 static inline void nsim_bpf_uninit(struct netdevsim *ns)
 {
 }

 static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
 {
 	return -EOPNOTSUPP;
 }

 static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
 {
 	return 0;
 }

 static inline int
 nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 			   void *cb_priv)
 {
 	return -EOPNOTSUPP;
 }
 #endif

 enum nsim_resource_id {
 	NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */
 	NSIM_RESOURCE_IPV4,
 	NSIM_RESOURCE_IPV4_FIB,
 	NSIM_RESOURCE_IPV4_FIB_RULES,
 	NSIM_RESOURCE_IPV6,
 	NSIM_RESOURCE_IPV6_FIB,
 	NSIM_RESOURCE_IPV6_FIB_RULES,
 	NSIM_RESOURCE_NEXTHOPS,
 };

 struct nsim_dev_health {
 	struct devlink_health_reporter *empty_reporter;
 	struct devlink_health_reporter *dummy_reporter;
 	struct dentry *ddir;
 	char *recovered_break_msg;
 	u32 binary_len;
 	bool fail_recover;
 };

 int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
 void nsim_dev_health_exit(struct nsim_dev *nsim_dev);

 #if IS_ENABLED(CONFIG_PSAMPLE)
 int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
 void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
 #else
 static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
 {
 	return 0;
 }

 static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
 {
 }
 #endif

 enum nsim_dev_port_type {
 	NSIM_DEV_PORT_TYPE_PF,
 	NSIM_DEV_PORT_TYPE_VF,
 };

 #define NSIM_DEV_VF_PORT_INDEX_BASE 128
 #define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX

 struct nsim_dev_port {
 	struct list_head list;
 	struct devlink_port devlink_port;
 	unsigned int port_index;
 	enum nsim_dev_port_type port_type;
 	struct dentry *ddir;
 	struct dentry *rate_parent;
 	char *parent_name;
 	struct netdevsim *ns;
 };

 struct nsim_dev {
 	struct nsim_bus_dev *nsim_bus_dev;
 	struct nsim_fib_data *fib_data;
 	struct nsim_trap_data *trap_data;
 	struct dentry *ddir;
 	struct dentry *ports_ddir;
 	struct dentry *take_snapshot;
 	struct dentry *max_vfs;
 	struct dentry *nodes_ddir;
 	struct bpf_offload_dev *bpf_dev;
 	bool bpf_bind_accept;
 	bool bpf_bind_verifier_accept;
 	u32 bpf_bind_verifier_delay;
 	struct dentry *ddir_bpf_bound_progs;
 	u32 prog_id_gen;
 	struct list_head bpf_bound_progs;
 	struct list_head bpf_bound_maps;
 	struct netdev_phys_item_id switch_id;
 	struct list_head port_list;
 	struct mutex port_list_lock; /* protects port list */
 	bool fw_update_status;
 	u32 fw_update_overwrite_mask;
 	u32 max_macs;
 	bool test1;
 	bool dont_allow_reload;
 	bool fail_reload;
 	struct devlink_region *dummy_region;
 	struct nsim_dev_health health;
 	struct flow_action_cookie *fa_cookie;
 	spinlock_t fa_cookie_lock; /* protects fa_cookie */
 	bool fail_trap_group_set;
 	bool fail_trap_policer_set;
 	bool fail_trap_policer_counter_get;
 	bool fail_trap_drop_counter_get;
 	struct {
 		struct udp_tunnel_nic_shared utn_shared;
 		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
 		bool sync_all;
 		bool open_only;
 		bool ipv4_only;
 		bool shared;
 		bool static_iana_vxlan;
 		u32 sleep;
 	} udp_ports;
 	struct nsim_dev_psample *psample;
 	u16 esw_mode;
 };

 int nsim_esw_legacy_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack);
 int nsim_esw_switchdev_enable(struct nsim_dev *nsim_dev, struct netlink_ext_ack *extack);

 static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
 {
 	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
 }

 static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
 {
 	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
 }

 static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
 {
 	return devlink_net(priv_to_devlink(nsim_dev));
 }

 int nsim_dev_init(void);
 void nsim_dev_exit(void);
 int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
 void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
 int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
 		      enum nsim_dev_port_type type,
 		      unsigned int port_index);
 int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
 		      enum nsim_dev_port_type type,
 		      unsigned int port_index);

 struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
 				      struct netlink_ext_ack *extack);
 void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
 u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
 		     enum nsim_resource_id res_id, bool max);

 ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
 				  char __user *data,
 				  size_t count, loff_t *ppos);
 ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
 				   const char __user *data,
 				   size_t count, loff_t *ppos);
 void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev);

 static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
 {
 	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
 }

 static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
 {
 	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
 }
 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
 void nsim_ipsec_init(struct netdevsim *ns);
 void nsim_ipsec_teardown(struct netdevsim *ns);
 bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
 #else
 static inline void nsim_ipsec_init(struct netdevsim *ns)
 {
 }

 static inline void nsim_ipsec_teardown(struct netdevsim *ns)
 {
 }

 static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
 {
 	return true;
 }
 #endif

 struct nsim_vf_config {
 	int link_state;
 	u16 min_tx_rate;
 	u16 max_tx_rate;
 	u16 vlan;
 	__be16 vlan_proto;
 	u16 qos;
 	u8 vf_mac[ETH_ALEN];
 	bool spoofchk_enabled;
 	bool trusted;
 	bool rss_query_enabled;
 };

 struct nsim_bus_dev {
 	struct device dev;
 	struct list_head list;
 	unsigned int port_count;
 	struct net *initial_net; /* Purpose of this is to carry net pointer
 				  * during the probe time only.
 				  */
 	unsigned int max_vfs;
 	unsigned int num_vfs;
 	struct mutex vfs_lock;  /* Protects vfconfigs */
 	struct nsim_vf_config *vfconfigs;
 	/* Lock for devlink->reload_enabled in netdevsim module */
 	struct mutex nsim_bus_reload_lock;
 	bool init;
 };

 int nsim_bus_init(void);
 void nsim_bus_exit(void);
	/*
	* 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/device.h>
	#include <linux/ethtool.h>
	#include <linux/kernel.h>
	#include <linux/list.h>
	#include <linux/netdevice.h>
	#include <linux/u64_stats_sync.h>
	#include <net/devlink.h>
	#include <net/udp_tunnel.h>
	#include <net/xdp.h>

	#define DRV_NAME "netdevsim"

	#define NSIM_XDP_MAX_MTU 4000

	#define NSIM_EA(extack, msg) NL_SET_ERR_MSG_MOD((extack), msg)

	#define NSIM_IPSEC_MAX_SA_COUNT 33
	#define NSIM_IPSEC_VALID BIT(31)
	#define NSIM_UDP_TUNNEL_N_PORTS 4

	struct nsim_sa {
	struct xfrm_state *xs;
	__be32 ipaddr[4];
	u32 key[4];
	u32 salt;
	bool used;
	bool crypt;
	bool rx;
	};

	struct nsim_ipsec {
	struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
	struct dentry *pfile;
	u32 count;
	u32 tx;
	u32 ok;
	};

	struct nsim_ethtool_pauseparam {
	bool rx;
	bool tx;
	bool report_stats_rx;
	bool report_stats_tx;
	};

	struct nsim_ethtool {
	u32 get_err;
	u32 set_err;
	struct nsim_ethtool_pauseparam pauseparam;
	struct ethtool_coalesce coalesce;
	struct ethtool_ringparam ring;
	struct ethtool_fecparam fec;
	};

	struct netdevsim {
	struct net_device *netdev;
	struct nsim_dev *nsim_dev;
	struct nsim_dev_port *nsim_dev_port;

	u64 tx_packets;
	u64 tx_bytes;
	struct u64_stats_sync syncp;

	struct nsim_bus_dev *nsim_bus_dev;

	struct bpf_prog *bpf_offloaded;
	u32 bpf_offloaded_id;

	struct xdp_attachment_info xdp;
	struct xdp_attachment_info xdp_hw;

	bool bpf_tc_accept;
	bool bpf_tc_non_bound_accept;
	bool bpf_xdpdrv_accept;
	bool bpf_xdpoffload_accept;

	bool bpf_map_accept;
	struct nsim_ipsec ipsec;
	struct {
	u32 inject_error;
	u32 sleep;
	u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
	u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
	struct debugfs_u32_array dfs_ports[2];
	} udp_ports;

	struct nsim_ethtool ethtool;
	};

	struct netdevsim *
	nsim_create(struct nsim_dev nsim_dev, struct nsim_dev_port nsim_dev_port);
	void nsim_destroy(struct netdevsim *ns);

	void nsim_ethtool_init(struct netdevsim *ns);

	void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
	int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
	struct net_device *dev);
	void nsim_udp_tunnels_info_destroy(struct net_device *dev);

	#ifdef CONFIG_BPF_SYSCALL
	int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
	void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
	int nsim_bpf_init(struct netdevsim *ns);
	void nsim_bpf_uninit(struct netdevsim *ns);
	int nsim_bpf(struct net_device dev, struct netdev_bpf bpf);
	int nsim_bpf_disable_tc(struct netdevsim *ns);
	int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
	void type_data, void cb_priv);
	#else

	static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
	{
	return 0;
	}

	static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
	{
	}
	static inline int nsim_bpf_init(struct netdevsim *ns)
	{
	return 0;
	}

	static inline void nsim_bpf_uninit(struct netdevsim *ns)
	{
	}

	static inline int nsim_bpf(struct net_device dev, struct netdev_bpf bpf)
	{
	return -EOPNOTSUPP;
	}

	static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
	{
	return 0;
	}

	static inline int
	nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
	void *cb_priv)
	{
	return -EOPNOTSUPP;
	}
	#endif

	enum nsim_resource_id {
	NSIM_RESOURCE_NONE, /* DEVLINK_RESOURCE_ID_PARENT_TOP */
	NSIM_RESOURCE_IPV4,
	NSIM_RESOURCE_IPV4_FIB,
	NSIM_RESOURCE_IPV4_FIB_RULES,
	NSIM_RESOURCE_IPV6,
	NSIM_RESOURCE_IPV6_FIB,
	NSIM_RESOURCE_IPV6_FIB_RULES,
	NSIM_RESOURCE_NEXTHOPS,
	};

	struct nsim_dev_health {
	struct devlink_health_reporter *empty_reporter;
	struct devlink_health_reporter *dummy_reporter;
	struct dentry *ddir;
	char *recovered_break_msg;
	u32 binary_len;
	bool fail_recover;
	};

	int nsim_dev_health_init(struct nsim_dev nsim_dev, struct devlink devlink);
	void nsim_dev_health_exit(struct nsim_dev *nsim_dev);

	#if IS_ENABLED(CONFIG_PSAMPLE)
	int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
	void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
	#else
	static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
	{
	return 0;
	}

	static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
	{
	}
	#endif

	enum nsim_dev_port_type {
	NSIM_DEV_PORT_TYPE_PF,
	NSIM_DEV_PORT_TYPE_VF,
	};

	#define NSIM_DEV_VF_PORT_INDEX_BASE 128
	#define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX

	struct nsim_dev_port {
	struct list_head list;
	struct devlink_port devlink_port;
	unsigned int port_index;
	enum nsim_dev_port_type port_type;
	struct dentry *ddir;
	struct dentry *rate_parent;
	char *parent_name;
	struct netdevsim *ns;
	};

	struct nsim_dev {
	struct nsim_bus_dev *nsim_bus_dev;
	struct nsim_fib_data *fib_data;
	struct nsim_trap_data *trap_data;
	struct dentry *ddir;
	struct dentry *ports_ddir;
	struct dentry *take_snapshot;
	struct dentry *max_vfs;
	struct dentry *nodes_ddir;
	struct bpf_offload_dev *bpf_dev;
	bool bpf_bind_accept;
	bool bpf_bind_verifier_accept;
	u32 bpf_bind_verifier_delay;
	struct dentry *ddir_bpf_bound_progs;
	u32 prog_id_gen;
	struct list_head bpf_bound_progs;
	struct list_head bpf_bound_maps;
	struct netdev_phys_item_id switch_id;
	struct list_head port_list;
	struct mutex port_list_lock; /* protects port list */
	bool fw_update_status;
	u32 fw_update_overwrite_mask;
	u32 max_macs;
	bool test1;
	bool dont_allow_reload;
	bool fail_reload;
	struct devlink_region *dummy_region;
	struct nsim_dev_health health;
	struct flow_action_cookie *fa_cookie;
	spinlock_t fa_cookie_lock; /* protects fa_cookie */
	bool fail_trap_group_set;
	bool fail_trap_policer_set;
	bool fail_trap_policer_counter_get;
	bool fail_trap_drop_counter_get;
	struct {
	struct udp_tunnel_nic_shared utn_shared;
	u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
	bool sync_all;
	bool open_only;
	bool ipv4_only;
	bool shared;
	bool static_iana_vxlan;
	u32 sleep;
	} udp_ports;
	struct nsim_dev_psample *psample;
	u16 esw_mode;
	};

	int nsim_esw_legacy_enable(struct nsim_dev nsim_dev, struct netlink_ext_ack extack);
	int nsim_esw_switchdev_enable(struct nsim_dev nsim_dev, struct netlink_ext_ack extack);

	static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
	{
	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
	}

	static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
	{
	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
	}

	static inline struct net nsim_dev_net(struct nsim_dev nsim_dev)
	{
	return devlink_net(priv_to_devlink(nsim_dev));
	}

	int nsim_dev_init(void);
	void nsim_dev_exit(void);
	int nsim_dev_probe(struct nsim_bus_dev *nsim_bus_dev);
	void nsim_dev_remove(struct nsim_bus_dev *nsim_bus_dev);
	int nsim_dev_port_add(struct nsim_bus_dev *nsim_bus_dev,
	enum nsim_dev_port_type type,
	unsigned int port_index);
	int nsim_dev_port_del(struct nsim_bus_dev *nsim_bus_dev,
	enum nsim_dev_port_type type,
	unsigned int port_index);

	struct nsim_fib_data nsim_fib_create(struct devlink devlink,
	struct netlink_ext_ack *extack);
	void nsim_fib_destroy(struct devlink devlink, struct nsim_fib_data fib_data);
	u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
	enum nsim_resource_id res_id, bool max);

	ssize_t nsim_bus_dev_max_vfs_read(struct file *file,
	char __user *data,
	size_t count, loff_t *ppos);
	ssize_t nsim_bus_dev_max_vfs_write(struct file *file,
	const char __user *data,
	size_t count, loff_t *ppos);
	void nsim_bus_dev_vfs_disable(struct nsim_bus_dev *nsim_bus_dev);

	static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
	{
	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
	}

	static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
	{
	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
	}
	#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
	void nsim_ipsec_init(struct netdevsim *ns);
	void nsim_ipsec_teardown(struct netdevsim *ns);
	bool nsim_ipsec_tx(struct netdevsim ns, struct sk_buff skb);
	#else
	static inline void nsim_ipsec_init(struct netdevsim *ns)
	{
	}

	static inline void nsim_ipsec_teardown(struct netdevsim *ns)
	{
	}

	static inline bool nsim_ipsec_tx(struct netdevsim ns, struct sk_buff skb)
	{
	return true;
	}
	#endif

	struct nsim_vf_config {
	int link_state;
	u16 min_tx_rate;
	u16 max_tx_rate;
	u16 vlan;
	__be16 vlan_proto;
	u16 qos;
	u8 vf_mac[ETH_ALEN];
	bool spoofchk_enabled;
	bool trusted;
	bool rss_query_enabled;
	};

	struct nsim_bus_dev {
	struct device dev;
	struct list_head list;
	unsigned int port_count;
	struct net initial_net; / Purpose of this is to carry net pointer
	* during the probe time only.
	*/
	unsigned int max_vfs;
	unsigned int num_vfs;
	struct mutex vfs_lock; /* Protects vfconfigs */
	struct nsim_vf_config *vfconfigs;
	/* Lock for devlink->reload_enabled in netdevsim module */
	struct mutex nsim_bus_reload_lock;
	bool init;
	};

	int nsim_bus_init(void);
	void nsim_bus_exit(void);