__  __    __   __  _____      _            _          _____ _          _ _ 
 |  \/  |   \ \ / / |  __ \    (_)          | |        / ____| |        | | |
 | \  / |_ __\ V /  | |__) | __ ___   ____ _| |_ ___  | (___ | |__   ___| | |
 | |\/| | '__|> <   |  ___/ '__| \ \ / / _` | __/ _ \  \___ \| '_ \ / _ \ | |
 | |  | | |_ / . \  | |   | |  | |\ V / (_| | ||  __/  ____) | | | |  __/ | |
 |_|  |_|_(_)_/ \_\ |_|   |_|  |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the Interfaces handler.
 *
 * Version:	@(#)dev.h	1.0.10	08/12/93
 *
 * Authors:	Ross Biro
 *		Fred N. van Kempen, <[email protected]>
 *		Corey Minyard <[email protected]>
 *		Donald J. Becker, <[email protected]>
 *		Alan Cox, <[email protected]>
 *		Bjorn Ekwall. <[email protected]>
 *              Pekka Riikonen <[email protected]>
 *
 *		Moved to /usr/include/linux for NET3
 */
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H

#include <linux/timer.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/atomic.h>
#include <linux/prefetch.h>
#include <asm/cache.h>
#include <asm/byteorder.h>
#include <asm/local.h>

#include <linux/percpu.h>
#include <linux/rculist.h>
#include <linux/workqueue.h>
#include <linux/dynamic_queue_limits.h>

#include <net/net_namespace.h>
#ifdef CONFIG_DCB
#include <net/dcbnl.h>
#endif
#include <net/netprio_cgroup.h>
#include <linux/netdev_features.h>
#include <linux/neighbour.h>
#include <linux/netdevice_xmit.h>
#include <uapi/linux/netdevice.h>
#include <uapi/linux/if_bonding.h>
#include <uapi/linux/pkt_cls.h>
#include <uapi/linux/netdev.h>
#include <linux/hashtable.h>
#include <linux/rbtree.h>
#include <net/net_trackers.h>
#include <net/net_debug.h>
#include <net/dropreason-core.h>
#include <net/neighbour_tables.h>

struct netpoll_info;
struct device;
struct ethtool_ops;
struct kernel_hwtstamp_config;
struct phy_device;
struct dsa_port;
struct ip_tunnel_parm_kern;
struct macsec_context;
struct macsec_ops;
struct netdev_config;
struct netdev_name_node;
struct sd_flow_limit;
struct sfp_bus;
/* 802.11 specific */
struct wireless_dev;
/* 802.15.4 specific */
struct wpan_dev;
struct mpls_dev;
/* UDP Tunnel offloads */
struct udp_tunnel_info;
struct udp_tunnel_nic_info;
struct udp_tunnel_nic;
struct bpf_prog;
struct xdp_buff;
struct xdp_frame;
struct xdp_metadata_ops;
struct xdp_md;
struct ethtool_netdev_state;
struct phy_link_topology;
struct hwtstamp_provider;

typedef u32 xdp_features_t;

void synchronize_net(void);
void netdev_set_default_ethtool_ops(struct net_device *dev,
				    const struct ethtool_ops *ops);
void netdev_sw_irq_coalesce_default_on(struct net_device *dev);

/* Backlog congestion levels */
#define NET_RX_SUCCESS		0	/* keep 'em coming, baby */
#define NET_RX_DROP		1	/* packet dropped */

#define MAX_NEST_DEV 8

/*
 * Transmit return codes: transmit return codes originate from three different
 * namespaces:
 *
 * - qdisc return codes
 * - driver transmit return codes
 * - errno values
 *
 * Drivers are allowed to return any one of those in their hard_start_xmit()
 * function. Real network devices commonly used with qdiscs should only return
 * the driver transmit return codes though - when qdiscs are used, the actual
 * transmission happens asynchronously, so the value is not propagated to
 * higher layers. Virtual network devices transmit synchronously; in this case
 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
 * others are propagated to higher layers.
 */

/* qdisc ->enqueue() return codes. */
#define NET_XMIT_SUCCESS	0x00
#define NET_XMIT_DROP		0x01	/* skb dropped			*/
#define NET_XMIT_CN		0x02	/* congestion notification	*/
#define NET_XMIT_MASK		0x0f	/* qdisc flags in net/sch_generic.h */

/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
 * indicates that the device will soon be dropping packets, or already drops
 * some packets of the same priority; prompting us to send less aggressively. */
#define net_xmit_eval(e)	((e) == NET_XMIT_CN ? 0 : (e))
#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

/* Driver transmit return codes */
#define NETDEV_TX_MASK		0xf0

enum netdev_tx {
	__NETDEV_TX_MIN	 = INT_MIN,	/* make sure enum is signed */
	NETDEV_TX_OK	 = 0x00,	/* driver took care of packet */
	NETDEV_TX_BUSY	 = 0x10,	/* driver tx path was busy*/
};
typedef enum netdev_tx netdev_tx_t;

/*
 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
 */
static inline bool dev_xmit_complete(int rc)
{
	/*
	 * Positive cases with an skb consumed by a driver:
	 * - successful transmission (rc == NETDEV_TX_OK)
	 * - error while transmitting (rc < 0)
	 * - error while queueing to a different device (rc & NET_XMIT_MASK)
	 */
	if (likely(rc < NET_XMIT_MASK))
		return true;

	return false;
}

/*
 *	Compute the worst-case header length according to the protocols
 *	used.
 */

#if defined(CONFIG_HYPERV_NET)
# define LL_MAX_HEADER 128
#elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
#else
# define LL_MAX_HEADER 32
#endif

#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
    !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

/*
 *	Old network device statistics. Fields are native words
 *	(unsigned long) so they can be read and written atomically.
 */

#define NET_DEV_STAT(FIELD)			\
	union {					\
		unsigned long FIELD;		\
		atomic_long_t __##FIELD;	\
	}

struct net_device_stats {
	NET_DEV_STAT(rx_packets);
	NET_DEV_STAT(tx_packets);
	NET_DEV_STAT(rx_bytes);
	NET_DEV_STAT(tx_bytes);
	NET_DEV_STAT(rx_errors);
	NET_DEV_STAT(tx_errors);
	NET_DEV_STAT(rx_dropped);
	NET_DEV_STAT(tx_dropped);
	NET_DEV_STAT(multicast);
	NET_DEV_STAT(collisions);
	NET_DEV_STAT(rx_length_errors);
	NET_DEV_STAT(rx_over_errors);
	NET_DEV_STAT(rx_crc_errors);
	NET_DEV_STAT(rx_frame_errors);
	NET_DEV_STAT(rx_fifo_errors);
	NET_DEV_STAT(rx_missed_errors);
	NET_DEV_STAT(tx_aborted_errors);
	NET_DEV_STAT(tx_carrier_errors);
	NET_DEV_STAT(tx_fifo_errors);
	NET_DEV_STAT(tx_heartbeat_errors);
	NET_DEV_STAT(tx_window_errors);
	NET_DEV_STAT(rx_compressed);
	NET_DEV_STAT(tx_compressed);
};
#undef NET_DEV_STAT

/* per-cpu stats, allocated on demand.
 * Try to fit them in a single cache line, for dev_get_stats() sake.
 */
struct net_device_core_stats {
	unsigned long	rx_dropped;
	unsigned long	tx_dropped;
	unsigned long	rx_nohandler;
	unsigned long	rx_otherhost_dropped;
} __aligned(4 * sizeof(unsigned long));

#include <linux/cache.h>
#include <linux/skbuff.h>

struct neighbour;
struct neigh_parms;
struct sk_buff;

struct netdev_hw_addr {
	struct list_head	list;
	struct rb_node		node;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
#define NETDEV_HW_ADDR_T_LAN		1
#define NETDEV_HW_ADDR_T_SAN		2
#define NETDEV_HW_ADDR_T_UNICAST	3
#define NETDEV_HW_ADDR_T_MULTICAST	4
	bool			global_use;
	int			sync_cnt;
	int			refcount;
	int			synced;
	struct rcu_head		rcu_head;
};

struct netdev_hw_addr_list {
	struct list_head	list;
	int			count;

	/* Auxiliary tree for faster lookup on addition and deletion */
	struct rb_root		tree;
};

#define netdev_hw_addr_list_count(l) ((l)->count)
#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
#define netdev_hw_addr_list_for_each(ha, l) \
	list_for_each_entry(ha, &(l)->list, list)

#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
#define netdev_for_each_uc_addr(ha, dev) \
	netdev_hw_addr_list_for_each(ha, &(dev)->uc)
#define netdev_for_each_synced_uc_addr(_ha, _dev) \
	netdev_for_each_uc_addr((_ha), (_dev)) \
		if ((_ha)->sync_cnt)

#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
#define netdev_for_each_mc_addr(ha, dev) \
	netdev_hw_addr_list_for_each(ha, &(dev)->mc)
#define netdev_for_each_synced_mc_addr(_ha, _dev) \
	netdev_for_each_mc_addr((_ha), (_dev)) \
		if ((_ha)->sync_cnt)

struct hh_cache {
	unsigned int	hh_len;
	seqlock_t	hh_lock;

	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
#define HH_DATA_ALIGN(__len) \
	(((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
	unsigned long	hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
};

/* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
 * Alternative is:
 *   dev->hard_header_len ? (dev->hard_header_len +
 *                           (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
 *
 * We could use other alignment values, but we must maintain the
 * relationship HH alignment <= LL alignment.
 */
#define LL_RESERVED_SPACE(dev) \
	((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom)) \
	  & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
	((((dev)->hard_header_len + READ_ONCE((dev)->needed_headroom) + (extra)) \
	  & ~(HH_DATA_MOD - 1)) + HH_DATA_MOD)

struct header_ops {
	int	(*create) (struct sk_buff *skb, struct net_device *dev,
			   unsigned short type, const void *daddr,
			   const void *saddr, unsigned int len);
	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
	bool	(*validate)(const char *ll_header, unsigned int len);
	__be16	(*parse_protocol)(const struct sk_buff *skb);
};

/* These flag bits are private to the generic network queueing
 * layer; they may not be explicitly referenced by any other
 * code.
 */

enum netdev_state_t {
	__LINK_STATE_START,
	__LINK_STATE_PRESENT,
	__LINK_STATE_NOCARRIER,
	__LINK_STATE_LINKWATCH_PENDING,
	__LINK_STATE_DORMANT,
	__LINK_STATE_TESTING,
};

struct gro_list {
	struct list_head	list;
	int			count;
};

/*
 * size of gro hash buckets, must less than bit number of
 * napi_struct::gro_bitmask
 */
#define GRO_HASH_BUCKETS	8

/*
 * Structure for per-NAPI config
 */
struct napi_config {
	u64 gro_flush_timeout;
	u64 irq_suspend_timeout;
	u32 defer_hard_irqs;
	unsigned int napi_id;
};

/*
 * Structure for NAPI scheduling similar to tasklet but with weighting
 */
struct napi_struct {
	/* The poll_list must only be managed by the entity which
	 * changes the state of the NAPI_STATE_SCHED bit.  This means
	 * whoever atomically sets that bit can add this napi_struct
	 * to the per-CPU poll_list, and whoever clears that bit
	 * can remove from the list right before clearing the bit.
	 */
	struct list_head	poll_list;

	unsigned long		state;
	int			weight;
	u32			defer_hard_irqs_count;
	unsigned long		gro_bitmask;
	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	/* CPU actively polling if netpoll is configured */
	int			poll_owner;
#endif
	/* CPU on which NAPI has been scheduled for processing */
	int			list_owner;
	struct net_device	*dev;
	struct gro_list		gro_hash[GRO_HASH_BUCKETS];
	struct sk_buff		*skb;
	struct list_head	rx_list; /* Pending GRO_NORMAL skbs */
	int			rx_count; /* length of rx_list */
	unsigned int		napi_id; /* protected by netdev_lock */
	struct hrtimer		timer;
	/* all fields past this point are write-protected by netdev_lock */
	struct task_struct	*thread;
	unsigned long		gro_flush_timeout;
	unsigned long		irq_suspend_timeout;
	u32			defer_hard_irqs;
	/* control-path-only fields follow */
	struct list_head	dev_list;
	struct hlist_node	napi_hash_node;
	int			irq;
	int			index;
	struct napi_config	*config;
};

enum {
	NAPI_STATE_SCHED,		/* Poll is scheduled */
	NAPI_STATE_MISSED,		/* reschedule a napi */
	NAPI_STATE_DISABLE,		/* Disable pending */
	NAPI_STATE_NPSVC,		/* Netpoll - don't dequeue from poll_list */
	NAPI_STATE_LISTED,		/* NAPI added to system lists */
	NAPI_STATE_NO_BUSY_POLL,	/* Do not add in napi_hash, no busy polling */
	NAPI_STATE_IN_BUSY_POLL,	/* sk_busy_loop() owns this NAPI */
	NAPI_STATE_PREFER_BUSY_POLL,	/* prefer busy-polling over softirq processing*/
	NAPI_STATE_THREADED,		/* The poll is performed inside its own thread*/
	NAPI_STATE_SCHED_THREADED,	/* Napi is currently scheduled in threaded mode */
};

enum {
	NAPIF_STATE_SCHED		= BIT(NAPI_STATE_SCHED),
	NAPIF_STATE_MISSED		= BIT(NAPI_STATE_MISSED),
	NAPIF_STATE_DISABLE		= BIT(NAPI_STATE_DISABLE),
	NAPIF_STATE_NPSVC		= BIT(NAPI_STATE_NPSVC),
	NAPIF_STATE_LISTED		= BIT(NAPI_STATE_LISTED),
	NAPIF_STATE_NO_BUSY_POLL	= BIT(NAPI_STATE_NO_BUSY_POLL),
	NAPIF_STATE_IN_BUSY_POLL	= BIT(NAPI_STATE_IN_BUSY_POLL),
	NAPIF_STATE_PREFER_BUSY_POLL	= BIT(NAPI_STATE_PREFER_BUSY_POLL),
	NAPIF_STATE_THREADED		= BIT(NAPI_STATE_THREADED),
	NAPIF_STATE_SCHED_THREADED	= BIT(NAPI_STATE_SCHED_THREADED),
};

enum gro_result {
	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_CONSUMED,
};
typedef enum gro_result gro_result_t;

/*
 * enum rx_handler_result - Possible return values for rx_handlers.
 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
 * further.
 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
 * case skb->dev was changed by rx_handler.
 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
 *
 * rx_handlers are functions called from inside __netif_receive_skb(), to do
 * special processing of the skb, prior to delivery to protocol handlers.
 *
 * Currently, a net_device can only have a single rx_handler registered. Trying
 * to register a second rx_handler will return -EBUSY.
 *
 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
 * To unregister a rx_handler on a net_device, use
 * netdev_rx_handler_unregister().
 *
 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
 * do with the skb.
 *
 * If the rx_handler consumed the skb in some way, it should return
 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
 * the skb to be delivered in some other way.
 *
 * If the rx_handler changed skb->dev, to divert the skb to another
 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
 * new device will be called if it exists.
 *
 * If the rx_handler decides the skb should be ignored, it should return
 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
 * are registered on exact device (ptype->dev == skb->dev).
 *
 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
 * delivered, it should return RX_HANDLER_PASS.
 *
 * A device without a registered rx_handler will behave as if rx_handler
 * returned RX_HANDLER_PASS.
 */

enum rx_handler_result {
	RX_HANDLER_CONSUMED,
	RX_HANDLER_ANOTHER,
	RX_HANDLER_EXACT,
	RX_HANDLER_PASS,
};
typedef enum rx_handler_result rx_handler_result_t;
typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);

void __napi_schedule(struct napi_struct *n);
void __napi_schedule_irqoff(struct napi_struct *n);

static inline bool napi_disable_pending(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

static inline bool napi_prefer_busy_poll(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);
}

/**
 * napi_is_scheduled - test if NAPI is scheduled
 * @n: NAPI context
 *
 * This check is "best-effort". With no locking implemented,
 * a NAPI can be scheduled or terminate right after this check
 * and produce not precise results.
 *
 * NAPI_STATE_SCHED is an internal state, napi_is_scheduled
 * should not be used normally and napi_schedule should be
 * used instead.
 *
 * Use only if the driver really needs to check if a NAPI
 * is scheduled for example in the context of delayed timer
 * that can be skipped if a NAPI is already scheduled.
 *
 * Return: True if NAPI is scheduled, False otherwise.
 */
static inline bool napi_is_scheduled(struct napi_struct *n)
{
	return test_bit(NAPI_STATE_SCHED, &n->state);
}

bool napi_schedule_prep(struct napi_struct *n);

/**
 *	napi_schedule - schedule NAPI poll
 *	@n: NAPI context
 *
 * Schedule NAPI poll routine to be called if it is not already
 * running.
 * Return: true if we schedule a NAPI or false if not.
 * Refer to napi_schedule_prep() for additional reason on why
 * a NAPI might not be scheduled.
 */
static inline bool napi_schedule(struct napi_struct *n)
{
	if (napi_schedule_prep(n)) {
		__napi_schedule(n);
		return true;
	}

	return false;
}

/**
 *	napi_schedule_irqoff - schedule NAPI poll
 *	@n: NAPI context
 *
 * Variant of napi_schedule(), assuming hard irqs are masked.
 */
static inline void napi_schedule_irqoff(struct napi_struct *n)
{
	if (napi_schedule_prep(n))
		__napi_schedule_irqoff(n);
}

/**
 * napi_complete_done - NAPI processing complete
 * @n: NAPI context
 * @work_done: number of packets processed
 *
 * Mark NAPI processing as complete. Should only be called if poll budget
 * has not been completely consumed.
 * Prefer over napi_complete().
 * Return: false if device should avoid rearming interrupts.
 */
bool napi_complete_done(struct napi_struct *n, int work_done);

static inline bool napi_complete(struct napi_struct *n)
{
	return napi_complete_done(n, 0);
}

int dev_set_threaded(struct net_device *dev, bool threaded);

void napi_disable(struct napi_struct *n);
void napi_disable_locked(struct napi_struct *n);

void napi_enable(struct napi_struct *n);
void napi_enable_locked(struct napi_struct *n);

/**
 *	napi_synchronize - wait until NAPI is not running
 *	@n: NAPI context
 *
 * Wait until NAPI is done being scheduled on this context.
 * Waits till any outstanding processing completes but
 * does not disable future activations.
 */
static inline void napi_synchronize(const struct napi_struct *n)
{
	if (IS_ENABLED(CONFIG_SMP))
		while (test_bit(NAPI_STATE_SCHED, &n->state))
			msleep(1);
	else
		barrier();
}

/**
 *	napi_if_scheduled_mark_missed - if napi is running, set the
 *	NAPIF_STATE_MISSED
 *	@n: NAPI context
 *
 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
 * NAPI is scheduled.
 **/
static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
{
	unsigned long val, new;

	val = READ_ONCE(n->state);
	do {
		if (val & NAPIF_STATE_DISABLE)
			return true;

		if (!(val & NAPIF_STATE_SCHED))
			return false;

		new = val | NAPIF_STATE_MISSED;
	} while (!try_cmpxchg(&n->state, &val, new));

	return true;
}

enum netdev_queue_state_t {
	__QUEUE_STATE_DRV_XOFF,
	__QUEUE_STATE_STACK_XOFF,
	__QUEUE_STATE_FROZEN,
};

#define QUEUE_STATE_DRV_XOFF	(1 << __QUEUE_STATE_DRV_XOFF)
#define QUEUE_STATE_STACK_XOFF	(1 << __QUEUE_STATE_STACK_XOFF)
#define QUEUE_STATE_FROZEN	(1 << __QUEUE_STATE_FROZEN)

#define QUEUE_STATE_ANY_XOFF	(QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
					QUEUE_STATE_FROZEN)
#define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
					QUEUE_STATE_FROZEN)

/*
 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue.  The
 * netif_tx_* functions below are used to manipulate this flag.  The
 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
 * queue independently.  The netif_xmit_*stopped functions below are called
 * to check if the queue has been stopped by the driver or stack (either
 * of the XOFF bits are set in the state).  Drivers should not need to call
 * netif_xmit*stopped functions, they should only be using netif_tx_*.
 */

struct netdev_queue {
/*
 * read-mostly part
 */
	struct net_device	*dev;
	netdevice_tracker	dev_tracker;

	struct Qdisc __rcu	*qdisc;
	struct Qdisc __rcu	*qdisc_sleeping;
#ifdef CONFIG_SYSFS
	struct kobject		kobj;
#endif
	unsigned long		tx_maxrate;
	/*
	 * Number of TX timeouts for this queue
	 * (/sys/class/net/DEV/Q/trans_timeout)
	 */
	atomic_long_t		trans_timeout;

	/* Subordinate device that the queue has been assigned to */
	struct net_device	*sb_dev;
#ifdef CONFIG_XDP_SOCKETS
	struct xsk_buff_pool    *pool;
#endif

/*
 * write-mostly part
 */
#ifdef CONFIG_BQL
	struct dql		dql;
#endif
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
	/*
	 * Time (in jiffies) of last Tx
	 */
	unsigned long		trans_start;

	unsigned long		state;

/*
 * slow- / control-path part
 */
	/* NAPI instance for the queue
	 * Readers and writers must hold RTNL
	 */
	struct napi_struct	*napi;

#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	int			numa_node;
#endif
} ____cacheline_aligned_in_smp;

extern int sysctl_fb_tunnels_only_for_init_net;
extern int sysctl_devconf_inherit_init_net;

/*
 * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns
 *                                     == 1 : For initns only
 *                                     == 2 : For none.
 */
static inline bool net_has_fallback_tunnels(const struct net *net)
{
#if IS_ENABLED(CONFIG_SYSCTL)
	int fb_tunnels_only_for_init_net = READ_ONCE(sysctl_fb_tunnels_only_for_init_net);

	return !fb_tunnels_only_for_init_net ||
		(net_eq(net, &init_net) && fb_tunnels_only_for_init_net == 1);
#else
	return true;
#endif
}

static inline int net_inherit_devconf(void)
{
#if IS_ENABLED(CONFIG_SYSCTL)
	return READ_ONCE(sysctl_devconf_inherit_init_net);
#else
	return 0;
#endif
}

static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
{
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	return q->numa_node;
#else
	return NUMA_NO_NODE;
#endif
}

static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
{
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	q->numa_node = node;
#endif
}

#ifdef CONFIG_RFS_ACCEL
bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
			 u16 filter_id);
#endif

/* XPS map type and offset of the xps map within net_device->xps_maps[]. */
enum xps_map_type {
	XPS_CPUS = 0,
	XPS_RXQS,
	XPS_MAPS_MAX,
};

#ifdef CONFIG_XPS
/*
 * This structure holds an XPS map which can be of variable length.  The
 * map is an array of queues.
 */
struct xps_map {
	unsigned int len;
	unsigned int alloc_len;
	struct rcu_head rcu;
	u16 queues[];
};
#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
       - sizeof(struct xps_map)) / sizeof(u16))

/*
 * This structure holds all XPS maps for device.  Maps are indexed by CPU.
 *
 * We keep track of the number of cpus/rxqs used when the struct is allocated,
 * in nr_ids. This will help not accessing out-of-bound memory.
 *
 * We keep track of the number of traffic classes used when the struct is
 * allocated, in num_tc. This will be used to navigate the maps, to ensure we're
 * not crossing its upper bound, as the original dev->num_tc can be updated in
 * the meantime.
 */
struct xps_dev_maps {
	struct rcu_head rcu;
	unsigned int nr_ids;
	s16 num_tc;
	struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */
};

#define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) +	\
	(nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))

#define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
	(_rxqs * (_tcs) * sizeof(struct xps_map *)))

#endif /* CONFIG_XPS */

#define TC_MAX_QUEUE	16
#define TC_BITMASK	15
/* HW offloaded queuing disciplines txq count and offset maps */
struct netdev_tc_txq {
	u16 count;
	u16 offset;
};

#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
/*
 * This structure is to hold information about the device
 * configured to run FCoE protocol stack.
 */
struct netdev_fcoe_hbainfo {
	char	manufacturer[64];
	char	serial_number[64];
	char	hardware_version[64];
	char	driver_version[64];
	char	optionrom_version[64];
	char	firmware_version[64];
	char	model[256];
	char	model_description[256];
};
#endif

#define MAX_PHYS_ITEM_ID_LEN 32

/* This structure holds a unique identifier to identify some
 * physical item (port for example) used by a netdevice.
 */
struct netdev_phys_item_id {
	unsigned char id[MAX_PHYS_ITEM_ID_LEN];
	unsigned char id_len;
};

static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
					    struct netdev_phys_item_id *b)
{
	return a->id_len == b->id_len &&
	       memcmp(a->id, b->id, a->id_len) == 0;
}

typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
				       struct sk_buff *skb,
				       struct net_device *sb_dev);

enum net_device_path_type {
	DEV_PATH_ETHERNET = 0,
	DEV_PATH_VLAN,
	DEV_PATH_BRIDGE,
	DEV_PATH_PPPOE,
	DEV_PATH_DSA,
	DEV_PATH_MTK_WDMA,
};

struct net_device_path {
	enum net_device_path_type	type;
	const struct net_device		*dev;
	union {
		struct {
			u16		id;
			__be16		proto;
			u8		h_dest[ETH_ALEN];
		} encap;
		struct {
			enum {
				DEV_PATH_BR_VLAN_KEEP,
				DEV_PATH_BR_VLAN_TAG,
				DEV_PATH_BR_VLAN_UNTAG,
				DEV_PATH_BR_VLAN_UNTAG_HW,
			}		vlan_mode;
			u16		vlan_id;
			__be16		vlan_proto;
		} bridge;
		struct {
			int port;
			u16 proto;
		} dsa;
		struct {
			u8 wdma_idx;
			u8 queue;
			u16 wcid;
			u8 bss;
			u8 amsdu;
		} mtk_wdma;
	};
};

#define NET_DEVICE_PATH_STACK_MAX	5
#define NET_DEVICE_PATH_VLAN_MAX	2

struct net_device_path_stack {
	int			num_paths;
	struct net_device_path	path[NET_DEVICE_PATH_STACK_MAX];
};

struct net_device_path_ctx {
	const struct net_device *dev;
	u8			daddr[ETH_ALEN];

	int			num_vlans;
	struct {
		u16		id;
		__be16		proto;
	} vlan[NET_DEVICE_PATH_VLAN_MAX];
};

enum tc_setup_type {
	TC_QUERY_CAPS,
	TC_SETUP_QDISC_MQPRIO,
	TC_SETUP_CLSU32,
	TC_SETUP_CLSFLOWER,
	TC_SETUP_CLSMATCHALL,
	TC_SETUP_CLSBPF,
	TC_SETUP_BLOCK,
	TC_SETUP_QDISC_CBS,
	TC_SETUP_QDISC_RED,
	TC_SETUP_QDISC_PRIO,
	TC_SETUP_QDISC_MQ,
	TC_SETUP_QDISC_ETF,
	TC_SETUP_ROOT_QDISC,
	TC_SETUP_QDISC_GRED,
	TC_SETUP_QDISC_TAPRIO,
	TC_SETUP_FT,
	TC_SETUP_QDISC_ETS,
	TC_SETUP_QDISC_TBF,
	TC_SETUP_QDISC_FIFO,
	TC_SETUP_QDISC_HTB,
	TC_SETUP_ACT,
};

/* These structures hold the attributes of bpf state that are being passed
 * to the netdevice through the bpf op.
 */
enum bpf_netdev_command {
	/* Set or clear a bpf program used in the earliest stages of packet
	 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
	 * is responsible for calling bpf_prog_put on any old progs that are
	 * stored. In case of error, the callee need not release the new prog
	 * reference, but on success it takes ownership and must bpf_prog_put
	 * when it is no longer used.
	 */
	XDP_SETUP_PROG,
	XDP_SETUP_PROG_HW,
	/* BPF program for offload callbacks, invoked at program load time. */
	BPF_OFFLOAD_MAP_ALLOC,
	BPF_OFFLOAD_MAP_FREE,
	XDP_SETUP_XSK_POOL,
};

struct bpf_prog_offload_ops;
struct netlink_ext_ack;
struct xdp_umem;
struct xdp_dev_bulk_queue;
struct bpf_xdp_link;

enum bpf_xdp_mode {
	XDP_MODE_SKB = 0,
	XDP_MODE_DRV = 1,
	XDP_MODE_HW = 2,
	__MAX_XDP_MODE
};

struct bpf_xdp_entity {
	struct bpf_prog *prog;
	struct bpf_xdp_link *link;
};

struct netdev_bpf {
	enum bpf_netdev_command command;
	union {
		/* XDP_SETUP_PROG */
		struct {
			u32 flags;
			struct bpf_prog *prog;
			struct netlink_ext_ack *extack;
		};
		/* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
		struct {
			struct bpf_offloaded_map *offmap;
		};
		/* XDP_SETUP_XSK_POOL */
		struct {
			struct xsk_buff_pool *pool;
			u16 queue_id;
		} xsk;
	};
};

/* Flags for ndo_xsk_wakeup. */
#define XDP_WAKEUP_RX (1 << 0)
#define XDP_WAKEUP_TX (1 << 1)

#ifdef CONFIG_XFRM_OFFLOAD
struct xfrmdev_ops {
	int	(*xdo_dev_state_add)(struct net_device *dev,
				     struct xfrm_state *x,
				     struct netlink_ext_ack *extack);
	void	(*xdo_dev_state_delete)(struct net_device *dev,
					struct xfrm_state *x);
	void	(*xdo_dev_state_free)(struct net_device *dev,
				      struct xfrm_state *x);
	bool	(*xdo_dev_offload_ok) (struct sk_buff *skb,
				       struct xfrm_state *x);
	void	(*xdo_dev_state_advance_esn) (struct xfrm_state *x);
	void	(*xdo_dev_state_update_stats) (struct xfrm_state *x);
	int	(*xdo_dev_policy_add) (struct xfrm_policy *x, struct netlink_ext_ack *extack);
	void	(*xdo_dev_policy_delete) (struct xfrm_policy *x);
	void	(*xdo_dev_policy_free) (struct xfrm_policy *x);
};
#endif

struct dev_ifalias {
	struct rcu_head rcuhead;
	char ifalias[];
};

struct devlink;
struct tlsdev_ops;

struct netdev_net_notifier {
	struct list_head list;
	struct notifier_block *nb;
};

/*
 * This structure defines the management hooks for network devices.
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
 *
 * int (*ndo_init)(struct net_device *dev);
 *     This function is called once when a network device is registered.
 *     The network device can use this for any late stage initialization
 *     or semantic validation. It can fail with an error code which will
 *     be propagated back to register_netdev.
 *
 * void (*ndo_uninit)(struct net_device *dev);
 *     This function is called when device is unregistered or when registration
 *     fails. It is not called if init fails.
 *
 * int (*ndo_open)(struct net_device *dev);
 *     This function is called when a network device transitions to the up
 *     state.
 *
 * int (*ndo_stop)(struct net_device *dev);
 *     This function is called when a network device transitions to the down
 *     state.
 *
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
 *	Called when a packet needs to be transmitted.
 *	Returns NETDEV_TX_OK.  Can return NETDEV_TX_BUSY, but you should stop
 *	the queue before that can happen; it's for obsolete devices and weird
 *	corner cases, but the stack really does a non-trivial amount
 *	of useless work if you return NETDEV_TX_BUSY.
 *	Required; cannot be NULL.
 *
 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
 *					   struct net_device *dev
 *					   netdev_features_t features);
 *	Called by core transmit path to determine if device is capable of
 *	performing offload operations on a given packet. This is to give
 *	the device an opportunity to implement any restrictions that cannot
 *	be otherwise expressed by feature flags. The check is called with
 *	the set of features that the stack has calculated and it returns
 *	those the driver believes to be appropriate.
 *
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
 *                         struct net_device *sb_dev);
 *	Called to decide which queue to use when device supports multiple
 *	transmit queues.
 *
 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
 *	This function is called to allow device receiver to make
 *	changes to configuration when multicast or promiscuous is enabled.
 *
 * void (*ndo_set_rx_mode)(struct net_device *dev);
 *	This function is called device changes address list filtering.
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT in its priv_flags.
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
 *	needs to be changed. If this interface is not defined, the
 *	MAC address can not be changed.
 *
 * int (*ndo_validate_addr)(struct net_device *dev);
 *	Test if Media Access Control address is valid for the device.
 *
 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
 *	Old-style ioctl entry point. This is used internally by the
 *	ieee802154 subsystem but is no longer called by the device
 *	ioctl handler.
 *
 * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd);
 *	Used by the bonding driver for its device specific ioctls:
 *	SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE,
 *	SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY
 *
 * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
 *	Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG,
 *	SIOCSMIIREG, SIOCSHWTSTAMP and SIOCGHWTSTAMP.
 *
 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
 *	Used to set network devices bus interface parameters. This interface
 *	is retained for legacy reasons; new devices should use the bus
 *	interface (PCI) for low level management.
 *
 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
 *	Called when a user wants to change the Maximum Transfer Unit
 *	of a device.
 *
 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
 *	Callback used when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
 * void (*ndo_get_stats64)(struct net_device *dev,
 *                         struct rtnl_link_stats64 *storage);
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
 *	Called when a user wants to get the network device usage
 *	statistics. Drivers must do one of the following:
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
 *	2. Define @ndo_get_stats to update a net_device_stats structure
 *	   (which should normally be dev->stats) and return a pointer to
 *	   it. The structure may be changed asynchronously only if each
 *	   field is written atomically.
 *	3. Update dev->stats asynchronously and atomically, and define
 *	   neither operation.
 *
 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
 *	Return true if this device supports offload stats of this attr_id.
 *
 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
 *	void *attr_data)
 *	Get statistics for offload operations by attr_id. Write it into the
 *	attr_data pointer.
 *
 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
 *	If device supports VLAN filtering this function is called when a
 *	VLAN id is registered.
 *
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
 *	If device supports VLAN filtering this function is called when a
 *	VLAN id is unregistered.
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
 *
 *	SR-IOV management functions.
 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
 *			  u8 qos, __be16 proto);
 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
 *			  int max_tx_rate);
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
 *			  struct nlattr *port[]);
 *
 *      Enable or disable the VF ability to query its RSS Redirection Table and
 *      Hash Key. This is needed since on some devices VF share this information
 *      with PF and querying it may introduce a theoretical security risk.
 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
 *		       void *type_data);
 *	Called to setup any 'tc' scheduler, classifier or action on @dev.
 *	This is always called from the stack with the rtnl lock held and netif
 *	tx queues stopped. This allows the netdevice to perform queue
 *	management safely.
 *
 *	Fiber Channel over Ethernet (FCoE) offload functions.
 * int (*ndo_fcoe_enable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to start using LLD for FCoE
 *	so the underlying device can perform whatever needed configuration or
 *	initialization to support acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_disable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to stop using LLD for FCoE
 *	so the underlying device can perform whatever needed clean-ups to
 *	stop supporting acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
 *			     struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Initiator wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
 * int (*ndo_fcoe_ddp_done)(struct net_device *dev,  u16 xid);
 *	Called when the FCoE Initiator/Target is done with the DDPed I/O as
 *	indicated by the FC exchange id 'xid', so the underlying device can
 *	clean up and reuse resources for later DDP requests.
 *
 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
 *			      struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Target wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
 *			       struct netdev_fcoe_hbainfo *hbainfo);
 *	Called when the FCoE Protocol stack wants information on the underlying
 *	device. This information is utilized by the FCoE protocol stack to
 *	register attributes with Fiber Channel management service as per the
 *	FC-GS Fabric Device Management Information(FDMI) specification.
 *
 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
 *	Called when the underlying device wants to override default World Wide
 *	Name (WWN) generation mechanism in FCoE protocol stack to pass its own
 *	World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
 *	protocol stack to use.
 *
 *	RFS acceleration.
 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
 *			    u16 rxq_index, u32 flow_id);
 *	Set hardware filter for RFS.  rxq_index is the target queue index;
 *	flow_id is a flow ID to be passed to rps_may_expire_flow() later.
 *	Return the filter ID on success, or a negative error code.
 *
 *	Slave management functions (for bridge, bonding, etc).
 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
 *	Called to make another netdev an underling.
 *
 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
 *	Called to release previously enslaved netdev.
 *
 * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,
 *					    struct sk_buff *skb,
 *					    bool all_slaves);
 *	Get the xmit slave of master device. If all_slaves is true, function
 *	assume all the slaves can transmit.
 *
 *      Feature/offload setting functions.
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
 *	Called to update device configuration to new features. Passed
 *	feature set might be less than what was returned by ndo_fix_features()).
 *	Must return >0 or -errno if it changed dev->features itself.
 *
 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
 *		      const unsigned char *addr, u16 vid, u16 flags,
 *		      bool *notified, struct netlink_ext_ack *extack);
 *	Adds an FDB entry to dev for addr.
 *	Callee shall set *notified to true if it sent any appropriate
 *	notification(s). Otherwise core will send a generic one.
 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
 *		      const unsigned char *addr, u16 vid
 *		      bool *notified, struct netlink_ext_ack *extack);
 *	Deletes the FDB entry from dev corresponding to addr.
 *	Callee shall set *notified to true if it sent any appropriate
 *	notification(s). Otherwise core will send a generic one.
 * int (*ndo_fdb_del_bulk)(struct nlmsghdr *nlh, struct net_device *dev,
 *			   struct netlink_ext_ack *extack);
 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
 *		       struct net_device *dev, struct net_device *filter_dev,
 *		       int *idx)
 *	Used to add FDB entries to dump requests. Implementers should add
 *	entries to skb and update idx with the number of entries.
 *
 * int (*ndo_mdb_add)(struct net_device *dev, struct nlattr *tb[],
 *		      u16 nlmsg_flags, struct netlink_ext_ack *extack);
 *	Adds an MDB entry to dev.
 * int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[],
 *		      struct netlink_ext_ack *extack);
 *	Deletes the MDB entry from dev.
 * int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[],
 *			   struct netlink_ext_ack *extack);
 *	Bulk deletes MDB entries from dev.
 * int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb,
 *		       struct netlink_callback *cb);
 *	Dumps MDB entries from dev. The first argument (marker) in the netlink
 *	callback is used by core rtnetlink code.
 *
 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
 *			     u16 flags, struct netlink_ext_ack *extack)
 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
 *			     struct net_device *dev, u32 filter_mask,
 *			     int nlflags)
 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
 *			     u16 flags);
 *
 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
 *	Called to change device carrier. Soft-devices (like dummy, team, etc)
 *	which do not represent real hardware may define this to allow their
 *	userspace components to manage their virtual carrier state. Devices
 *	that determine carrier state from physical hardware properties (eg
 *	network cables) or protocol-dependent mechanisms (eg
 *	USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
 *
 * int (*ndo_get_phys_port_id)(struct net_device *dev,
 *			       struct netdev_phys_item_id *ppid);
 *	Called to get ID of physical port of this device. If driver does
 *	not implement this, it is assumed that the hw is not able to have
 *	multiple net devices on single physical port.
 *
 * int (*ndo_get_port_parent_id)(struct net_device *dev,
 *				 struct netdev_phys_item_id *ppid)
 *	Called to get the parent ID of the physical port of this device.
 *
 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
 *				 struct net_device *dev)
 *	Called by upper layer devices to accelerate switching or other
 *	station functionality into hardware. 'pdev is the lowerdev
 *	to use for the offload and 'dev' is the net device that will
 *	back the offload. Returns a pointer to the private structure
 *	the upper layer will maintain.
 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
 *	Called by upper layer device to delete the station created
 *	by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
 *	the station and priv is the structure returned by the add
 *	operation.
 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
 *			     int queue_index, u32 maxrate);
 *	Called when a user wants to set a max-rate limitation of specific
 *	TX queue.
 * int (*ndo_get_iflink)(const struct net_device *dev);
 *	Called to get the iflink value of this device.
 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
 *	This function is used to get egress tunnel information for given skb.
 *	This is useful for retrieving outer tunnel header parameters while
 *	sampling packet.
 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
 *	This function is used to specify the headroom that the skb must
 *	consider when allocation skb during packet reception. Setting
 *	appropriate rx headroom value allows avoiding skb head copy on
 *	forward. Setting a negative value resets the rx headroom to the
 *	default value.
 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
 *	This function is used to set or query state related to XDP on the
 *	netdevice and manage BPF offload. See definition of
 *	enum bpf_netdev_command for details.
 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
 *			u32 flags);
 *	This function is used to submit @n XDP packets for transmit on a
 *	netdevice. Returns number of frames successfully transmitted, frames
 *	that got dropped are freed/returned via xdp_return_frame().
 *	Returns negative number, means general error invoking ndo, meaning
 *	no frames were xmit'ed and core-caller will free all frames.
 * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev,
 *					        struct xdp_buff *xdp);
 *      Get the xmit slave of master device based on the xdp_buff.
 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
 *      This function is used to wake up the softirq, ksoftirqd or kthread
 *	responsible for sending and/or receiving packets on a specific
 *	queue id bound to an AF_XDP socket. The flags field specifies if
 *	only RX, only Tx, or both should be woken up using the flags
 *	XDP_WAKEUP_RX and XDP_WAKEUP_TX.
 * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm_kern *p,
 *			 int cmd);
 *	Add, change, delete or get information on an IPv4 tunnel.
 * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);
 *	If a device is paired with a peer device, return the peer instance.
 *	The caller must be under RCU read context.
 * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path);
 *     Get the forwarding path to reach the real device from the HW destination address
 * ktime_t (*ndo_get_tstamp)(struct net_device *dev,
 *			     const struct skb_shared_hwtstamps *hwtstamps,
 *			     bool cycles);
 *	Get hardware timestamp based on normal/adjustable time or free running
 *	cycle counter. This function is required if physical clock supports a
 *	free running cycle counter.
 *
 * int (*ndo_hwtstamp_get)(struct net_device *dev,
 *			   struct kernel_hwtstamp_config *kernel_config);
 *	Get the currently configured hardware timestamping parameters for the
 *	NIC device.
 *
 * int (*ndo_hwtstamp_set)(struct net_device *dev,
 *			   struct kernel_hwtstamp_config *kernel_config,
 *			   struct netlink_ext_ack *extack);
 *	Change the hardware timestamping parameters for NIC device.
 */
struct net_device_ops {
	int			(*ndo_init)(struct net_device *dev);
	void			(*ndo_uninit)(struct net_device *dev);
	int			(*ndo_open)(struct net_device *dev);
	int			(*ndo_stop)(struct net_device *dev);
	netdev_tx_t		(*ndo_start_xmit)(struct sk_buff *skb,
						  struct net_device *dev);
	netdev_features_t	(*ndo_features_check)(struct sk_buff *skb,
						      struct net_device *dev,
						      netdev_features_t features);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb,
						    struct net_device *sb_dev);
	void			(*ndo_change_rx_flags)(struct net_device *dev,
						       int flags);
	void			(*ndo_set_rx_mode)(struct net_device *dev);
	int			(*ndo_set_mac_address)(struct net_device *dev,
						       void *addr);
	int			(*ndo_validate_addr)(struct net_device *dev);
	int			(*ndo_do_ioctl)(struct net_device *dev,
					        struct ifreq *ifr, int cmd);
	int			(*ndo_eth_ioctl)(struct net_device *dev,
						 struct ifreq *ifr, int cmd);
	int			(*ndo_siocbond)(struct net_device *dev,
						struct ifreq *ifr, int cmd);
	int			(*ndo_siocwandev)(struct net_device *dev,
						  struct if_settings *ifs);
	int			(*ndo_siocdevprivate)(struct net_device *dev,
						      struct ifreq *ifr,
						      void __user *data, int cmd);
	int			(*ndo_set_config)(struct net_device *dev,
					          struct ifmap *map);
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
	void			(*ndo_tx_timeout) (struct net_device *dev,
						   unsigned int txqueue);

	void			(*ndo_get_stats64)(struct net_device *dev,
						   struct rtnl_link_stats64 *storage);
	bool			(*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
	int			(*ndo_get_offload_stats)(int attr_id,
							 const struct net_device *dev,
							 void *attr_data);
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
						       __be16 proto, u16 vid);
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
						        __be16 proto, u16 vid);
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
	int			(*ndo_netpoll_setup)(struct net_device *dev);
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
#endif
	int			(*ndo_set_vf_mac)(struct net_device *dev,
						  int queue, u8 *mac);
	int			(*ndo_set_vf_vlan)(struct net_device *dev,
						   int queue, u16 vlan,
						   u8 qos, __be16 proto);
	int			(*ndo_set_vf_rate)(struct net_device *dev,
						   int vf, int min_tx_rate,
						   int max_tx_rate);
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
	int			(*ndo_set_vf_trust)(struct net_device *dev,
						    int vf, bool setting);
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
	int			(*ndo_set_vf_link_state)(struct net_device *dev,
							 int vf, int link_state);
	int			(*ndo_get_vf_stats)(struct net_device *dev,
						    int vf,
						    struct ifla_vf_stats
						    *vf_stats);
	int			(*ndo_set_vf_port)(struct net_device *dev,
						   int vf,
						   struct nlattr *port[]);
	int			(*ndo_get_vf_port)(struct net_device *dev,
						   int vf, struct sk_buff *skb);
	int			(*ndo_get_vf_guid)(struct net_device *dev,
						   int vf,
						   struct ifla_vf_guid *node_guid,
						   struct ifla_vf_guid *port_guid);
	int			(*ndo_set_vf_guid)(struct net_device *dev,
						   int vf, u64 guid,
						   int guid_type);
	int			(*ndo_set_vf_rss_query_en)(
						   struct net_device *dev,
						   int vf, bool setting);
	int			(*ndo_setup_tc)(struct net_device *dev,
						enum tc_setup_type type,
						void *type_data);
#if IS_ENABLED(CONFIG_FCOE)
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
	int			(*ndo_fcoe_ddp_setup)(struct net_device *dev,
						      u16 xid,
						      struct scatterlist *sgl,
						      unsigned int sgc);
	int			(*ndo_fcoe_ddp_done)(struct net_device *dev,
						     u16 xid);
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
#endif

#if IS_ENABLED(CONFIG_LIBFCOE)
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
#endif

#ifdef CONFIG_RFS_ACCEL
	int			(*ndo_rx_flow_steer)(struct net_device *dev,
						     const struct sk_buff *skb,
						     u16 rxq_index,
						     u32 flow_id);
#endif
	int			(*ndo_add_slave)(struct net_device *dev,
						 struct net_device *slave_dev,
						 struct netlink_ext_ack *extack);
	int			(*ndo_del_slave)(struct net_device *dev,
						 struct net_device *slave_dev);
	struct net_device*	(*ndo_get_xmit_slave)(struct net_device *dev,
						      struct sk_buff *skb,
						      bool all_slaves);
	struct net_device*	(*ndo_sk_get_lower_dev)(struct net_device *dev,
							struct sock *sk);
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
	int			(*ndo_set_features)(struct net_device *dev,
						    netdev_features_t features);
	int			(*ndo_neigh_construct)(struct net_device *dev,
						       struct neighbour *n);
	void			(*ndo_neigh_destroy)(struct net_device *dev,
						     struct neighbour *n);

	int			(*ndo_fdb_add)(struct ndmsg *ndm,
					       struct nlattr *tb[],
					       struct net_device *dev,
					       const unsigned char *addr,
					       u16 vid,
					       u16 flags,
					       bool *notified,
					       struct netlink_ext_ack *extack);
	int			(*ndo_fdb_del)(struct ndmsg *ndm,
					       struct nlattr *tb[],
					       struct net_device *dev,
					       const unsigned char *addr,
					       u16 vid,
					       bool *notified,
					       struct netlink_ext_ack *extack);
	int			(*ndo_fdb_del_bulk)(struct nlmsghdr *nlh,
						    struct net_device *dev,
						    struct netlink_ext_ack *extack);
	int			(*ndo_fdb_dump)(struct sk_buff *skb,
						struct netlink_callback *cb,
						struct net_device *dev,
						struct net_device *filter_dev,
						int *idx);
	int			(*ndo_fdb_get)(struct sk_buff *skb,
					       struct nlattr *tb[],
					       struct net_device *dev,
					       const unsigned char *addr,
					       u16 vid, u32 portid, u32 seq,
					       struct netlink_ext_ack *extack);
	int			(*ndo_mdb_add)(struct net_device *dev,
					       struct nlattr *tb[],
					       u16 nlmsg_flags,
					       struct netlink_ext_ack *extack);
	int			(*ndo_mdb_del)(struct net_device *dev,
					       struct nlattr *tb[],
					       struct netlink_ext_ack *extack);
	int			(*ndo_mdb_del_bulk)(struct net_device *dev,
						    struct nlattr *tb[],
						    struct netlink_ext_ack *extack);
	int			(*ndo_mdb_dump)(struct net_device *dev,
						struct sk_buff *skb,
						struct netlink_callback *cb);
	int			(*ndo_mdb_get)(struct net_device *dev,
					       struct nlattr *tb[], u32 portid,
					       u32 seq,
					       struct netlink_ext_ack *extack);
	int			(*ndo_bridge_setlink)(struct net_device *dev,
						      struct nlmsghdr *nlh,
						      u16 flags,
						      struct netlink_ext_ack *extack);
	int			(*ndo_bridge_getlink)(struct sk_buff *skb,
						      u32 pid, u32 seq,
						      struct net_device *dev,
						      u32 filter_mask,
						      int nlflags);
	int			(*ndo_bridge_dellink)(struct net_device *dev,
						      struct nlmsghdr *nlh,
						      u16 flags);
	int			(*ndo_change_carrier)(struct net_device *dev,
						      bool new_carrier);
	int			(*ndo_get_phys_port_id)(struct net_device *dev,
							struct netdev_phys_item_id *ppid);
	int			(*ndo_get_port_parent_id)(struct net_device *dev,
							  struct netdev_phys_item_id *ppid);
	int			(*ndo_get_phys_port_name)(struct net_device *dev,
							  char *name, size_t len);
	void*			(*ndo_dfwd_add_station)(struct net_device *pdev,
							struct net_device *dev);
	void			(*ndo_dfwd_del_station)(struct net_device *pdev,
							void *priv);

	int			(*ndo_set_tx_maxrate)(struct net_device *dev,
						      int queue_index,
						      u32 maxrate);
	int			(*ndo_get_iflink)(const struct net_device *dev);
	int			(*ndo_fill_metadata_dst)(struct net_device *dev,
						       struct sk_buff *skb);
	void			(*ndo_set_rx_headroom)(struct net_device *dev,
						       int needed_headroom);
	int			(*ndo_bpf)(struct net_device *dev,
					   struct netdev_bpf *bpf);
	int			(*ndo_xdp_xmit)(struct net_device *dev, int n,
						struct xdp_frame **xdp,
						u32 flags);
	struct net_device *	(*ndo_xdp_get_xmit_slave)(struct net_device *dev,
							  struct xdp_buff *xdp);
	int			(*ndo_xsk_wakeup)(struct net_device *dev,
						  u32 queue_id, u32 flags);
	int			(*ndo_tunnel_ctl)(struct net_device *dev,
						  struct ip_tunnel_parm_kern *p,
						  int cmd);
	struct net_device *	(*ndo_get_peer_dev)(struct net_device *dev);
	int                     (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx,
                                                         struct net_device_path *path);
	ktime_t			(*ndo_get_tstamp)(struct net_device *dev,
						  const struct skb_shared_hwtstamps *hwtstamps,
						  bool cycles);
	int			(*ndo_hwtstamp_get)(struct net_device *dev,
						    struct kernel_hwtstamp_config *kernel_config);
	int			(*ndo_hwtstamp_set)(struct net_device *dev,
						    struct kernel_hwtstamp_config *kernel_config,
						    struct netlink_ext_ack *extack);

#if IS_ENABLED(CONFIG_NET_SHAPER)
	/**
	 * @net_shaper_ops: Device shaping offload operations
	 * see include/net/net_shapers.h
	 */
	const struct net_shaper_ops *net_shaper_ops;
#endif
};

/**
 * enum netdev_priv_flags - &struct net_device priv_flags
 *
 * These are the &struct net_device, they are only set internally
 * by drivers and used in the kernel. These flags are invisible to
 * userspace; this means that the order of these flags can change
 * during any kernel release.
 *
 * You should add bitfield booleans after either net_device::priv_flags
 * (hotpath) or ::threaded (slowpath) instead of extending these flags.
 *
 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
 * @IFF_EBRIDGE: Ethernet bridging device
 * @IFF_BONDING: bonding master or slave
 * @IFF_ISATAP: ISATAP interface (RFC4214)
 * @IFF_WAN_HDLC: WAN HDLC device
 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
 *	release skb->dst
 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
 * @IFF_MACVLAN_PORT: device used as macvlan port
 * @IFF_BRIDGE_PORT: device used as bridge port
 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
 * @IFF_UNICAST_FLT: Supports unicast filtering
 * @IFF_TEAM_PORT: device used as team port
 * @IFF_SUPP_NOFCS: device supports sending custom FCS
 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
 *	change when it's running
 * @IFF_MACVLAN: Macvlan device
 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
 *	underlying stacked devices
 * @IFF_L3MDEV_MASTER: device is an L3 master device
 * @IFF_NO_QUEUE: device can run without qdisc attached
 * @IFF_OPENVSWITCH: device is a Open vSwitch master
 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
 * @IFF_TEAM: device is a team device
 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
 *	entity (i.e. the master device for bridged veth)
 * @IFF_MACSEC: device is a MACsec device
 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
 * @IFF_FAILOVER: device is a failover master device
 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
 * @IFF_NO_ADDRCONF: prevent ipv6 addrconf
 * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with
 *	skb_headlen(skb) == 0 (data starts from frag0)
 */
enum netdev_priv_flags {
	IFF_802_1Q_VLAN			= 1<<0,
	IFF_EBRIDGE			= 1<<1,
	IFF_BONDING			= 1<<2,
	IFF_ISATAP			= 1<<3,
	IFF_WAN_HDLC			= 1<<4,
	IFF_XMIT_DST_RELEASE		= 1<<5,
	IFF_DONT_BRIDGE			= 1<<6,
	IFF_DISABLE_NETPOLL		= 1<<7,
	IFF_MACVLAN_PORT		= 1<<8,
	IFF_BRIDGE_PORT			= 1<<9,
	IFF_OVS_DATAPATH		= 1<<10,
	IFF_TX_SKB_SHARING		= 1<<11,
	IFF_UNICAST_FLT			= 1<<12,
	IFF_TEAM_PORT			= 1<<13,
	IFF_SUPP_NOFCS			= 1<<14,
	IFF_LIVE_ADDR_CHANGE		= 1<<15,
	IFF_MACVLAN			= 1<<16,
	IFF_XMIT_DST_RELEASE_PERM	= 1<<17,
	IFF_L3MDEV_MASTER		= 1<<18,
	IFF_NO_QUEUE			= 1<<19,
	IFF_OPENVSWITCH			= 1<<20,
	IFF_L3MDEV_SLAVE		= 1<<21,
	IFF_TEAM			= 1<<22,
	IFF_RXFH_CONFIGURED		= 1<<23,
	IFF_PHONY_HEADROOM		= 1<<24,
	IFF_MACSEC			= 1<<25,
	IFF_NO_RX_HANDLER		= 1<<26,
	IFF_FAILOVER			= 1<<27,
	IFF_FAILOVER_SLAVE		= 1<<28,
	IFF_L3MDEV_RX_HANDLER		= 1<<29,
	IFF_NO_ADDRCONF			= BIT_ULL(30),
	IFF_TX_SKB_NO_LINEAR		= BIT_ULL(31),
};

/* Specifies the type of the struct net_device::ml_priv pointer */
enum netdev_ml_priv_type {
	ML_PRIV_NONE,
	ML_PRIV_CAN,
};

enum netdev_stat_type {
	NETDEV_PCPU_STAT_NONE,
	NETDEV_PCPU_STAT_LSTATS, /* struct pcpu_lstats */
	NETDEV_PCPU_STAT_TSTATS, /* struct pcpu_sw_netstats */
	NETDEV_PCPU_STAT_DSTATS, /* struct pcpu_dstats */
};

enum netdev_reg_state {
	NETREG_UNINITIALIZED = 0,
	NETREG_REGISTERED,	/* completed register_netdevice */
	NETREG_UNREGISTERING,	/* called unregister_netdevice */
	NETREG_UNREGISTERED,	/* completed unregister todo */
	NETREG_RELEASED,	/* called free_netdev */
	NETREG_DUMMY,		/* dummy device for NAPI poll */
};

/**
 *	struct net_device - The DEVICE structure.
 *
 *	Actually, this whole structure is a big mistake.  It mixes I/O
 *	data with strictly "high-level" data, and it has to know about
 *	almost every data structure used in the INET module.
 *
 *	@priv_flags:	flags invisible to userspace defined as bits, see
 *			enum netdev_priv_flags for the definitions
 *	@lltx:		device supports lockless Tx. Deprecated for real HW
 *			drivers. Mainly used by logical interfaces, such as
 *			bonding and tunnels
 *
 *	@name:	This is the first field of the "visible" part of this structure
 *		(i.e. as seen by users in the "Space.c" file).  It is the name
 *		of the interface.
 *
 *	@name_node:	Name hashlist node
 *	@ifalias:	SNMP alias
 *	@mem_end:	Shared memory end
 *	@mem_start:	Shared memory start
 *	@base_addr:	Device I/O address
 *	@irq:		Device IRQ number
 *
 *	@state:		Generic network queuing layer state, see netdev_state_t
 *	@dev_list:	The global list of network devices
 *	@napi_list:	List entry used for polling NAPI devices
 *	@unreg_list:	List entry  when we are unregistering the
 *			device; see the function unregister_netdev
 *	@close_list:	List entry used when we are closing the device
 *	@ptype_all:     Device-specific packet handlers for all protocols
 *	@ptype_specific: Device-specific, protocol-specific packet handlers
 *
 *	@adj_list:	Directly linked devices, like slaves for bonding
 *	@features:	Currently active device features
 *	@hw_features:	User-changeable features
 *
 *	@wanted_features:	User-requested features
 *	@vlan_features:		Mask of features inheritable by VLAN devices
 *
 *	@hw_enc_features:	Mask of features inherited by encapsulating devices
 *				This field indicates what encapsulation
 *				offloads the hardware is capable of doing,
 *				and drivers will need to set them appropriately.
 *
 *	@mpls_features:	Mask of features inheritable by MPLS
 *	@gso_partial_features: value(s) from NETIF_F_GSO\*
 *
 *	@ifindex:	interface index
 *	@group:		The group the device belongs to
 *
 *	@stats:		Statistics struct, which was left as a legacy, use
 *			rtnl_link_stats64 instead
 *
 *	@core_stats:	core networking counters,
 *			do not use this in drivers
 *	@carrier_up_count:	Number of times the carrier has been up
 *	@carrier_down_count:	Number of times the carrier has been down
 *
 *	@wireless_handlers:	List of functions to handle Wireless Extensions,
 *				instead of ioctl,
 *				see <net/iw_handler.h> for details.
 *
 *	@netdev_ops:	Includes several pointers to callbacks,
 *			if one wants to override the ndo_*() functions
 *	@xdp_metadata_ops:	Includes pointers to XDP metadata callbacks.
 *	@xsk_tx_metadata_ops:	Includes pointers to AF_XDP TX metadata callbacks.
 *	@ethtool_ops:	Management operations
 *	@l3mdev_ops:	Layer 3 master device operations
 *	@ndisc_ops:	Includes callbacks for different IPv6 neighbour
 *			discovery handling. Necessary for e.g. 6LoWPAN.
 *	@xfrmdev_ops:	Transformation offload operations
 *	@tlsdev_ops:	Transport Layer Security offload operations
 *	@header_ops:	Includes callbacks for creating,parsing,caching,etc
 *			of Layer 2 headers.
 *
 *	@flags:		Interface flags (a la BSD)
 *	@xdp_features:	XDP capability supported by the device
 *	@gflags:	Global flags ( kept as legacy )
 *	@priv_len:	Size of the ->priv flexible array
 *	@priv:		Flexible array containing private data
 *	@operstate:	RFC2863 operstate
 *	@link_mode:	Mapping policy to operstate
 *	@if_port:	Selectable AUI, TP, ...
 *	@dma:		DMA channel
 *	@mtu:		Interface MTU value
 *	@min_mtu:	Interface Minimum MTU value
 *	@max_mtu:	Interface Maximum MTU value
 *	@type:		Interface hardware type
 *	@hard_header_len: Maximum hardware header length.
 *	@min_header_len:  Minimum hardware header length
 *
 *	@needed_headroom: Extra headroom the hardware may need, but not in all
 *			  cases can this be guaranteed
 *	@needed_tailroom: Extra tailroom the hardware may need, but not in all
 *			  cases can this be guaranteed. Some cases also use
 *			  LL_MAX_HEADER instead to allocate the skb
 *
 *	interface address info:
 *
 * 	@perm_addr:		Permanent hw address
 * 	@addr_assign_type:	Hw address assignment type
 * 	@addr_len:		Hardware address length
 *	@upper_level:		Maximum depth level of upper devices.
 *	@lower_level:		Maximum depth level of lower devices.
 *	@neigh_priv_len:	Used in neigh_alloc()
 * 	@dev_id:		Used to differentiate devices that share
 * 				the same link layer address
 * 	@dev_port:		Used to differentiate devices that share
 * 				the same function
 *	@addr_list_lock:	XXX: need comments on this one
 *	@name_assign_type:	network interface name assignment type
 *	@uc_promisc:		Counter that indicates promiscuous mode
 *				has been enabled due to the need to listen to
 *				additional unicast addresses in a device that
 *				does not implement ndo_set_rx_mode()
 *	@uc:			unicast mac addresses
 *	@mc:			multicast mac addresses
 *	@dev_addrs:		list of device hw addresses
 *	@queues_kset:		Group of all Kobjects in the Tx and RX queues
 *	@promiscuity:		Number of times the NIC is told to work in
 *				promiscuous mode; if it becomes 0 the NIC will
 *				exit promiscuous mode
 *	@allmulti:		Counter, enables or disables allmulticast mode
 *
 *	@vlan_info:	VLAN info
 *	@dsa_ptr:	dsa specific data
 *	@tipc_ptr:	TIPC specific data
 *	@atalk_ptr:	AppleTalk link
 *	@ip_ptr:	IPv4 specific data
 *	@ip6_ptr:	IPv6 specific data
 *	@ax25_ptr:	AX.25 specific data
 *	@ieee80211_ptr:	IEEE 802.11 specific data, assign before registering
 *	@ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
 *			 device struct
 *	@mpls_ptr:	mpls_dev struct pointer
 *	@mctp_ptr:	MCTP specific data
 *
 *	@dev_addr:	Hw address (before bcast,
 *			because most packets are unicast)
 *
 *	@_rx:			Array of RX queues
 *	@num_rx_queues:		Number of RX queues
 *				allocated at register_netdev() time
 *	@real_num_rx_queues: 	Number of RX queues currently active in device
 *	@xdp_prog:		XDP sockets filter program pointer
 *
 *	@rx_handler:		handler for received packets
 *	@rx_handler_data: 	XXX: need comments on this one
 *	@tcx_ingress:		BPF & clsact qdisc specific data for ingress processing
 *	@ingress_queue:		XXX: need comments on this one
 *	@nf_hooks_ingress:	netfilter hooks executed for ingress packets
 *	@broadcast:		hw bcast address
 *
 *	@rx_cpu_rmap:	CPU reverse-mapping for RX completion interrupts,
 *			indexed by RX queue number. Assigned by driver.
 *			This must only be set if the ndo_rx_flow_steer
 *			operation is defined
 *	@index_hlist:		Device index hash chain
 *
 *	@_tx:			Array of TX queues
 *	@num_tx_queues:		Number of TX queues allocated at alloc_netdev_mq() time
 *	@real_num_tx_queues: 	Number of TX queues currently active in device
 *	@qdisc:			Root qdisc from userspace point of view
 *	@tx_queue_len:		Max frames per queue allowed
 *	@tx_global_lock: 	XXX: need comments on this one
 *	@xdp_bulkq:		XDP device bulk queue
 *	@xps_maps:		all CPUs/RXQs maps for XPS device
 *
 *	@xps_maps:	XXX: need comments on this one
 *	@tcx_egress:		BPF & clsact qdisc specific data for egress processing
 *	@nf_hooks_egress:	netfilter hooks executed for egress packets
 *	@qdisc_hash:		qdisc hash table
 *	@watchdog_timeo:	Represents the timeout that is used by
 *				the watchdog (see dev_watchdog())
 *	@watchdog_timer:	List of timers
 *
 *	@proto_down_reason:	reason a netdev interface is held down
 *	@pcpu_refcnt:		Number of references to this device
 *	@dev_refcnt:		Number of references to this device
 *	@refcnt_tracker:	Tracker directory for tracked references to this device
 *	@todo_list:		Delayed register/unregister
 *	@link_watch_list:	XXX: need comments on this one
 *
 *	@reg_state:		Register/unregister state machine
 *	@dismantle:		Device is going to be freed
 *	@rtnl_link_state:	This enum represents the phases of creating
 *				a new link
 *
 *	@needs_free_netdev:	Should unregister perform free_netdev?
 *	@priv_destructor:	Called from unregister
 *	@npinfo:		XXX: need comments on this one
 * 	@nd_net:		Network namespace this network device is inside
 *
 * 	@ml_priv:	Mid-layer private
 *	@ml_priv_type:  Mid-layer private type
 *
 *	@pcpu_stat_type:	Type of device statistics which the core should
 *				allocate/free: none, lstats, tstats, dstats. none
 *				means the driver is handling statistics allocation/
 *				freeing internally.
 *	@lstats:		Loopback statistics: packets, bytes
 *	@tstats:		Tunnel statistics: RX/TX packets, RX/TX bytes
 *	@dstats:		Dummy statistics: RX/TX/drop packets, RX/TX bytes
 *
 *	@garp_port:	GARP
 *	@mrp_port:	MRP
 *
 *	@dm_private:	Drop monitor private
 *
 *	@dev:		Class/net/name entry
 *	@sysfs_groups:	Space for optional device, statistics and wireless
 *			sysfs groups
 *
 *	@sysfs_rx_queue_group:	Space for optional per-rx queue attributes
 *	@rtnl_link_ops:	Rtnl_link_ops
 *	@stat_ops:	Optional ops for queue-aware statistics
 *	@queue_mgmt_ops:	Optional ops for queue management
 *
 *	@gso_max_size:	Maximum size of generic segmentation offload
 *	@tso_max_size:	Device (as in HW) limit on the max TSO request size
 *	@gso_max_segs:	Maximum number of segments that can be passed to the
 *			NIC for GSO
 *	@tso_max_segs:	Device (as in HW) limit on the max TSO segment count
 * 	@gso_ipv4_max_size:	Maximum size of generic segmentation offload,
 * 				for IPv4.
 *
 *	@dcbnl_ops:	Data Center Bridging netlink ops
 *	@num_tc:	Number of traffic classes in the net device
 *	@tc_to_txq:	XXX: need comments on this one
 *	@prio_tc_map:	XXX: need comments on this one
 *
 *	@fcoe_ddp_xid:	Max exchange id for FCoE LRO by ddp
 *
 *	@priomap:	XXX: need comments on this one
 *	@link_topo:	Physical link topology tracking attached PHYs
 *	@phydev:	Physical device may attach itself
 *			for hardware timestamping
 *	@sfp_bus:	attached &struct sfp_bus structure.
 *
 *	@qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
 *
 *	@proto_down:	protocol port state information can be sent to the
 *			switch driver and used to set the phys state of the
 *			switch port.
 *
 *	@threaded:	napi threaded mode is enabled
 *
 *	@see_all_hwtstamp_requests: device wants to see calls to
 *			ndo_hwtstamp_set() for all timestamp requests
 *			regardless of source, even if those aren't
 *			HWTSTAMP_SOURCE_NETDEV
 *	@change_proto_down: device supports setting carrier via IFLA_PROTO_DOWN
 *	@netns_local: interface can't change network namespaces
 *	@fcoe_mtu:	device supports maximum FCoE MTU, 2158 bytes
 *
 *	@net_notifier_list:	List of per-net netdev notifier block
 *				that follow this device when it is moved
 *				to another network namespace.
 *
 *	@macsec_ops:    MACsec offloading ops
 *
 *	@udp_tunnel_nic_info:	static structure describing the UDP tunnel
 *				offload capabilities of the device
 *	@udp_tunnel_nic:	UDP tunnel offload state
 *	@ethtool:	ethtool related state
 *	@xdp_state:		stores info on attached XDP BPF programs
 *
 *	@nested_level:	Used as a parameter of spin_lock_nested() of
 *			dev->addr_list_lock.
 *	@unlink_list:	As netif_addr_lock() can be called recursively,
 *			keep a list of interfaces to be deleted.
 *	@gro_max_size:	Maximum size of aggregated packet in generic
 *			receive offload (GRO)
 * 	@gro_ipv4_max_size:	Maximum size of aggregated packet in generic
 * 				receive offload (GRO), for IPv4.
 *	@xdp_zc_max_segs:	Maximum number of segments supported by AF_XDP
 *				zero copy driver
 *
 *	@dev_addr_shadow:	Copy of @dev_addr to catch direct writes.
 *	@linkwatch_dev_tracker:	refcount tracker used by linkwatch.
 *	@watchdog_dev_tracker:	refcount tracker used by watchdog.
 *	@dev_registered_tracker:	tracker for reference held while
 *					registered
 *	@offload_xstats_l3:	L3 HW stats for this netdevice.
 *
 *	@devlink_port:	Pointer to related devlink port structure.
 *			Assigned by a driver before netdev registration using
 *			SET_NETDEV_DEVLINK_PORT macro. This pointer is static
 *			during the time netdevice is registered.
 *
 *	@dpll_pin: Pointer to the SyncE source pin of a DPLL subsystem,
 *		   where the clock is recovered.
 *
 *	@max_pacing_offload_horizon: max EDT offload horizon in nsec.
 *	@napi_config: An array of napi_config structures containing per-NAPI
 *		      settings.
 *	@gro_flush_timeout:	timeout for GRO layer in NAPI
 *	@napi_defer_hard_irqs:	If not zero, provides a counter that would
 *				allow to avoid NIC hard IRQ, on busy queues.
 *
 *	@neighbours:	List heads pointing to this device's neighbours'
 *			dev_list, one per address-family.
 *	@hwprov: Tracks which PTP performs hardware packet time stamping.
 *
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

struct net_device {
	/* Cacheline organization can be found documented in
	 * Documentation/networking/net_cachelines/net_device.rst.
	 * Please update the document when adding new fields.
	 */

	/* TX read-mostly hotpath */
	__cacheline_group_begin(net_device_read_tx);
	struct_group(priv_flags_fast,
		unsigned long		priv_flags:32;
		unsigned long		lltx:1;
	);
	const struct net_device_ops *netdev_ops;
	const struct header_ops *header_ops;
	struct netdev_queue	*_tx;
	netdev_features_t	gso_partial_features;
	unsigned int		real_num_tx_queues;
	unsigned int		gso_max_size;
	unsigned int		gso_ipv4_max_size;
	u16			gso_max_segs;
	s16			num_tc;
	/* Note : dev->mtu is often read without holding a lock.
	 * Writers usually hold RTNL.
	 * It is recommended to use READ_ONCE() to annotate the reads,
	 * and to use WRITE_ONCE() to annotate the writes.
	 */
	unsigned int		mtu;
	unsigned short		needed_headroom;
	struct netdev_tc_txq	tc_to_txq[TC_MAX_QUEUE];
#ifdef CONFIG_XPS
	struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX];
#endif
#ifdef CONFIG_NETFILTER_EGRESS
	struct nf_hook_entries __rcu *nf_hooks_egress;
#endif
#ifdef CONFIG_NET_XGRESS
	struct bpf_mprog_entry __rcu *tcx_egress;
#endif
	__cacheline_group_end(net_device_read_tx);

	/* TXRX read-mostly hotpath */
	__cacheline_group_begin(net_device_read_txrx);
	union {
		struct pcpu_lstats __percpu		*lstats;
		struct pcpu_sw_netstats __percpu	*tstats;
		struct pcpu_dstats __percpu		*dstats;
	};
	unsigned long		state;
	unsigned int		flags;
	unsigned short		hard_header_len;
	netdev_features_t	features;
	struct inet6_dev __rcu	*ip6_ptr;
	__cacheline_group_end(net_device_read_txrx);

	/* RX read-mostly hotpath */
	__cacheline_group_begin(net_device_read_rx);
	struct bpf_prog __rcu	*xdp_prog;
	struct list_head	ptype_specific;
	int			ifindex;
	unsigned int		real_num_rx_queues;
	struct netdev_rx_queue	*_rx;
	unsigned int		gro_max_size;
	unsigned int		gro_ipv4_max_size;
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
	possible_net_t			nd_net;
#ifdef CONFIG_NETPOLL
	struct netpoll_info __rcu	*npinfo;
#endif
#ifdef CONFIG_NET_XGRESS
	struct bpf_mprog_entry __rcu *tcx_ingress;
#endif
	__cacheline_group_end(net_device_read_rx);

	char			name[IFNAMSIZ];
	struct netdev_name_node	*name_node;
	struct dev_ifalias	__rcu *ifalias;
	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
	unsigned long		mem_end;
	unsigned long		mem_start;
	unsigned long		base_addr;

	/*
	 *	Some hardware also needs these fields (state,dev_list,
	 *	napi_list,unreg_list,close_list) but they are not
	 *	part of the usual set specified in Space.c.
	 */


	struct list_head	dev_list;
	struct list_head	napi_list;
	struct list_head	unreg_list;
	struct list_head	close_list;
	struct list_head	ptype_all;

	struct {
		struct list_head upper;
		struct list_head lower;
	} adj_list;

	/* Read-mostly cache-line for fast-path access */
	xdp_features_t		xdp_features;
	const struct xdp_metadata_ops *xdp_metadata_ops;
	const struct xsk_tx_metadata_ops *xsk_tx_metadata_ops;
	unsigned short		gflags;

	unsigned short		needed_tailroom;

	netdev_features_t	hw_features;
	netdev_features_t	wanted_features;
	netdev_features_t	vlan_features;
	netdev_features_t	hw_enc_features;
	netdev_features_t	mpls_features;

	unsigned int		min_mtu;
	unsigned int		max_mtu;
	unsigned short		type;
	unsigned char		min_header_len;
	unsigned char		name_assign_type;

	int			group;

	struct net_device_stats	stats; /* not used by modern drivers */

	struct net_device_core_stats __percpu *core_stats;

	/* Stats to monitor link on/off, flapping */
	atomic_t		carrier_up_count;
	atomic_t		carrier_down_count;

#ifdef CONFIG_WIRELESS_EXT
	const struct iw_handler_def *wireless_handlers;
#endif
	const struct ethtool_ops *ethtool_ops;
#ifdef CONFIG_NET_L3_MASTER_DEV
	const struct l3mdev_ops	*l3mdev_ops;
#endif
#if IS_ENABLED(CONFIG_IPV6)
	const struct ndisc_ops *ndisc_ops;
#endif

#ifdef CONFIG_XFRM_OFFLOAD
	const struct xfrmdev_ops *xfrmdev_ops;
#endif

#if IS_ENABLED(CONFIG_TLS_DEVICE)
	const struct tlsdev_ops *tlsdev_ops;
#endif

	unsigned int		operstate;
	unsigned char		link_mode;

	unsigned char		if_port;
	unsigned char		dma;

	/* Interface address info. */
	unsigned char		perm_addr[MAX_ADDR_LEN];
	unsigned char		addr_assign_type;
	unsigned char		addr_len;
	unsigned char		upper_level;
	unsigned char		lower_level;

	unsigned short		neigh_priv_len;
	unsigned short          dev_id;
	unsigned short          dev_port;
	int			irq;
	u32			priv_len;

	spinlock_t		addr_list_lock;

	struct netdev_hw_addr_list	uc;
	struct netdev_hw_addr_list	mc;
	struct netdev_hw_addr_list	dev_addrs;

#ifdef CONFIG_SYSFS
	struct kset		*queues_kset;
#endif
#ifdef CONFIG_LOCKDEP
	struct list_head	unlink_list;
#endif
	unsigned int		promiscuity;
	unsigned int		allmulti;
	bool			uc_promisc;
#ifdef CONFIG_LOCKDEP
	unsigned char		nested_level;
#endif


	/* Protocol-specific pointers */
	struct in_device __rcu	*ip_ptr;
	/** @fib_nh_head: nexthops associated with this netdev */
	struct hlist_head	fib_nh_head;

#if IS_ENABLED(CONFIG_VLAN_8021Q)
	struct vlan_info __rcu	*vlan_info;
#endif
#if IS_ENABLED(CONFIG_NET_DSA)
	struct dsa_port		*dsa_ptr;
#endif
#if IS_ENABLED(CONFIG_TIPC)
	struct tipc_bearer __rcu *tipc_ptr;
#endif
#if IS_ENABLED(CONFIG_ATALK)
	void 			*atalk_ptr;
#endif
#if IS_ENABLED(CONFIG_AX25)
	struct ax25_dev	__rcu	*ax25_ptr;
#endif
#if IS_ENABLED(CONFIG_CFG80211)
	struct wireless_dev	*ieee80211_ptr;
#endif
#if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN)
	struct wpan_dev		*ieee802154_ptr;
#endif
#if IS_ENABLED(CONFIG_MPLS_ROUTING)
	struct mpls_dev __rcu	*mpls_ptr;
#endif
#if IS_ENABLED(CONFIG_MCTP)
	struct mctp_dev __rcu	*mctp_ptr;
#endif

/*
 * Cache lines mostly used on receive path (including eth_type_trans())
 */
	/* Interface address info used in eth_type_trans() */
	const unsigned char	*dev_addr;

	unsigned int		num_rx_queues;
#define GRO_LEGACY_MAX_SIZE	65536u
/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE),
 * and shinfo->gso_segs is a 16bit field.
 */
#define GRO_MAX_SIZE		(8 * 65535u)
	unsigned int		xdp_zc_max_segs;
	struct netdev_queue __rcu *ingress_queue;
#ifdef CONFIG_NETFILTER_INGRESS
	struct nf_hook_entries __rcu *nf_hooks_ingress;
#endif

	unsigned char		broadcast[MAX_ADDR_LEN];
#ifdef CONFIG_RFS_ACCEL
	struct cpu_rmap		*rx_cpu_rmap;
#endif
	struct hlist_node	index_hlist;

/*
 * Cache lines mostly used on transmit path
 */
	unsigned int		num_tx_queues;
	struct Qdisc __rcu	*qdisc;
	unsigned int		tx_queue_len;
	spinlock_t		tx_global_lock;

	struct xdp_dev_bulk_queue __percpu *xdp_bulkq;

#ifdef CONFIG_NET_SCHED
	DECLARE_HASHTABLE	(qdisc_hash, 4);
#endif
	/* These may be needed for future network-power-down code. */
	struct timer_list	watchdog_timer;
	int			watchdog_timeo;

	u32                     proto_down_reason;

	struct list_head	todo_list;

#ifdef CONFIG_PCPU_DEV_REFCNT
	int __percpu		*pcpu_refcnt;
#else
	refcount_t		dev_refcnt;
#endif
	struct ref_tracker_dir	refcnt_tracker;

	struct list_head	link_watch_list;

	u8 reg_state;

	bool dismantle;

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;

	bool needs_free_netdev;
	void (*priv_destructor)(struct net_device *dev);

	/* mid-layer private */
	void				*ml_priv;
	enum netdev_ml_priv_type	ml_priv_type;

	enum netdev_stat_type		pcpu_stat_type:8;

#if IS_ENABLED(CONFIG_GARP)
	struct garp_port __rcu	*garp_port;
#endif
#if IS_ENABLED(CONFIG_MRP)
	struct mrp_port __rcu	*mrp_port;
#endif
#if IS_ENABLED(CONFIG_NET_DROP_MONITOR)
	struct dm_hw_stat_delta __rcu *dm_private;
#endif
	struct device		dev;
	const struct attribute_group *sysfs_groups[4];
	const struct attribute_group *sysfs_rx_queue_group;

	const struct rtnl_link_ops *rtnl_link_ops;

	const struct netdev_stat_ops *stat_ops;

	const struct netdev_queue_mgmt_ops *queue_mgmt_ops;

	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SEGS		65535u
#define GSO_LEGACY_MAX_SIZE	65536u
/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE),
 * and shinfo->gso_segs is a 16bit field.
 */
#define GSO_MAX_SIZE		(8 * GSO_MAX_SEGS)

#define TSO_LEGACY_MAX_SIZE	65536
#define TSO_MAX_SIZE		UINT_MAX
	unsigned int		tso_max_size;
#define TSO_MAX_SEGS		U16_MAX
	u16			tso_max_segs;

#ifdef CONFIG_DCB
	const struct dcbnl_rtnl_ops *dcbnl_ops;
#endif
	u8			prio_tc_map[TC_BITMASK + 1];

#if IS_ENABLED(CONFIG_FCOE)
	unsigned int		fcoe_ddp_xid;
#endif
#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
	struct netprio_map __rcu *priomap;
#endif
	struct phy_link_topology	*link_topo;
	struct phy_device	*phydev;
	struct sfp_bus		*sfp_bus;
	struct lock_class_key	*qdisc_tx_busylock;
	bool			proto_down;
	bool			threaded;

	/* priv_flags_slow, ungrouped to save space */
	unsigned long		see_all_hwtstamp_requests:1;
	unsigned long		change_proto_down:1;
	unsigned long		netns_local:1;
	unsigned long		fcoe_mtu:1;

	struct list_head	net_notifier_list;

#if IS_ENABLED(CONFIG_MACSEC)
	/* MACsec management functions */
	const struct macsec_ops *macsec_ops;
#endif
	const struct udp_tunnel_nic_info	*udp_tunnel_nic_info;
	struct udp_tunnel_nic	*udp_tunnel_nic;

	/** @cfg: net_device queue-related configuration */
	struct netdev_config	*cfg;
	/**
	 * @cfg_pending: same as @cfg but when device is being actively
	 *	reconfigured includes any changes to the configuration
	 *	requested by the user, but which may or may not be rejected.
	 */
	struct netdev_config	*cfg_pending;
	struct ethtool_netdev_state *ethtool;

	/* protected by rtnl_lock */
	struct bpf_xdp_entity	xdp_state[__MAX_XDP_MODE];

	u8 dev_addr_shadow[MAX_ADDR_LEN];
	netdevice_tracker	linkwatch_dev_tracker;
	netdevice_tracker	watchdog_dev_tracker;
	netdevice_tracker	dev_registered_tracker;
	struct rtnl_hw_stats64	*offload_xstats_l3;

	struct devlink_port	*devlink_port;

#if IS_ENABLED(CONFIG_DPLL)
	struct dpll_pin	__rcu	*dpll_pin;
#endif
#if IS_ENABLED(CONFIG_PAGE_POOL)
	/** @page_pools: page pools created for this netdevice */
	struct hlist_head	page_pools;
#endif

	/** @irq_moder: dim parameters used if IS_ENABLED(CONFIG_DIMLIB). */
	struct dim_irq_moder	*irq_moder;

	u64			max_pacing_offload_horizon;
	struct napi_config	*napi_config;
	unsigned long		gro_flush_timeout;
	u32			napi_defer_hard_irqs;

	/**
	 * @up: copy of @state's IFF_UP, but safe to read with just @lock.
	 *	May report false negatives while the device is being opened
	 *	or closed (@lock does not protect .ndo_open, or .ndo_close).
	 */
	bool			up;

	/**
	 * @lock: netdev-scope lock, protects a small selection of fields.
	 * Should always be taken using netdev_lock() / netdev_unlock() helpers.
	 * Drivers are free to use it for other protection.
	 *
	 * Protects:
	 *	@gro_flush_timeout, @napi_defer_hard_irqs, @napi_list,
	 *	@net_shaper_hierarchy, @reg_state, @threaded
	 *
	 * Partially protects (writers must hold both @lock and rtnl_lock):
	 *	@up
	 *
	 * Also protects some fields in struct napi_struct.
	 *
	 * Ordering: take after rtnl_lock.
	 */
	struct mutex		lock;

#if IS_ENABLED(CONFIG_NET_SHAPER)
	/**
	 * @net_shaper_hierarchy: data tracking the current shaper status
	 *  see include/net/net_shapers.h
	 */
	struct net_shaper_hierarchy *net_shaper_hierarchy;
#endif

	struct hlist_head neighbours[NEIGH_NR_TABLES];

	struct hwtstamp_provider __rcu	*hwprov;

	u8			priv[] ____cacheline_aligned
				       __counted_by(priv_len);
} ____cacheline_aligned;
#define to_net_dev(d) container_of(d, struct net_device, dev)

/*
 * Driver should use this to assign devlink port instance to a netdevice
 * before it registers the netdevice. Therefore devlink_port is static
 * during the netdev lifetime after it is registered.
 */
#define SET_NETDEV_DEVLINK_PORT(dev, port)			\
({								\
	WARN_ON((dev)->reg_state != NETREG_UNINITIALIZED);	\
	((dev)->devlink_port = (port));				\
})

static inline bool netif_elide_gro(const struct net_device *dev)
{
	if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
		return true;
	return false;
}

#define	NETDEV_ALIGN		32

static inline
int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
{
	return dev->prio_tc_map[prio & TC_BITMASK];
}

static inline
int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
{
	if (tc >= dev->num_tc)
		return -EINVAL;

	dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
	return 0;
}

int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
void netdev_reset_tc(struct net_device *dev);
int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
int netdev_set_num_tc(struct net_device *dev, u8 num_tc);

static inline
int netdev_get_num_tc(struct net_device *dev)
{
	return dev->num_tc;
}

static inline void net_prefetch(void *p)
{
	prefetch(p);
#if L1_CACHE_BYTES < 128
	prefetch((u8 *)p + L1_CACHE_BYTES);
#endif
}

static inline void net_prefetchw(void *p)
{
	prefetchw(p);
#if L1_CACHE_BYTES < 128
	prefetchw((u8 *)p + L1_CACHE_BYTES);
#endif
}

void netdev_unbind_sb_channel(struct net_device *dev,
			      struct net_device *sb_dev);
int netdev_bind_sb_channel_queue(struct net_device *dev,
				 struct net_device *sb_dev,
				 u8 tc, u16 count, u16 offset);
int netdev_set_sb_channel(struct net_device *dev, u16 channel);
static inline int netdev_get_sb_channel(struct net_device *dev)
{
	return max_t(int, -dev->num_tc, 0);
}

static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	DEBUG_NET_WARN_ON_ONCE(index >= dev->num_tx_queues);
	return &dev->_tx[index];
}

static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
						    const struct sk_buff *skb)
{
	return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
}

static inline void netdev_for_each_tx_queue(struct net_device *dev,
					    void (*f)(struct net_device *,
						      struct netdev_queue *,
						      void *),
					    void *arg)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++)
		f(dev, &dev->_tx[i], arg);
}

#define netdev_lockdep_set_classes(dev)				\
{								\
	static struct lock_class_key qdisc_tx_busylock_key;	\
	static struct lock_class_key qdisc_xmit_lock_key;	\
	static struct lock_class_key dev_addr_list_lock_key;	\
	unsigned int i;						\
								\
	(dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key;	\
	lockdep_set_class(&(dev)->addr_list_lock,		\
			  &dev_addr_list_lock_key);		\
	for (i = 0; i < (dev)->num_tx_queues; i++)		\
		lockdep_set_class(&(dev)->_tx[i]._xmit_lock,	\
				  &qdisc_xmit_lock_key);	\
}

u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
		     struct net_device *sb_dev);
struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
					 struct sk_buff *skb,
					 struct net_device *sb_dev);

/* returns the headroom that the master device needs to take in account
 * when forwarding to this dev
 */
static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
{
	return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
}

static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
{
	if (dev->netdev_ops->ndo_set_rx_headroom)
		dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
}

/* set the device rx headroom to the dev's default */
static inline void netdev_reset_rx_headroom(struct net_device *dev)
{
	netdev_set_rx_headroom(dev, -1);
}

static inline void *netdev_get_ml_priv(struct net_device *dev,
				       enum netdev_ml_priv_type type)
{
	if (dev->ml_priv_type != type)
		return NULL;

	return dev->ml_priv;
}

static inline void netdev_set_ml_priv(struct net_device *dev,
				      void *ml_priv,
				      enum netdev_ml_priv_type type)
{
	WARN(dev->ml_priv_type && dev->ml_priv_type != type,
	     "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n",
	     dev->ml_priv_type, type);
	WARN(!dev->ml_priv_type && dev->ml_priv,
	     "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n");

	dev->ml_priv = ml_priv;
	dev->ml_priv_type = type;
}

/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
	return read_pnet(&dev->nd_net);
}

static inline
struct net *dev_net_rcu(const struct net_device *dev)
{
	return read_pnet_rcu(&dev->nd_net);
}

static inline
void dev_net_set(struct net_device *dev, struct net *net)
{
	write_pnet(&dev->nd_net, net);
}

/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
static inline void *netdev_priv(const struct net_device *dev)
{
	return (void *)dev->priv;
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))

/* Set the sysfs device type for the network logical device to allow
 * fine-grained identification of different network device types. For
 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

void netif_queue_set_napi(struct net_device *dev, unsigned int queue_index,
			  enum netdev_queue_type type,
			  struct napi_struct *napi);

static inline void netdev_lock(struct net_device *dev)
{
	mutex_lock(&dev->lock);
}

static inline void netdev_unlock(struct net_device *dev)
{
	mutex_unlock(&dev->lock);
}

static inline void netdev_assert_locked(struct net_device *dev)
{
	lockdep_assert_held(&dev->lock);
}

static inline void netdev_assert_locked_or_invisible(struct net_device *dev)
{
	if (dev->reg_state == NETREG_REGISTERED ||
	    dev->reg_state == NETREG_UNREGISTERING)
		netdev_assert_locked(dev);
}

static inline void netif_napi_set_irq_locked(struct napi_struct *napi, int irq)
{
	napi->irq = irq;
}

static inline void netif_napi_set_irq(struct napi_struct *napi, int irq)
{
	netdev_lock(napi->dev);
	netif_napi_set_irq_locked(napi, irq);
	netdev_unlock(napi->dev);
}

/* Default NAPI poll() weight
 * Device drivers are strongly advised to not use bigger value
 */
#define NAPI_POLL_WEIGHT 64

void netif_napi_add_weight_locked(struct net_device *dev,
				  struct napi_struct *napi,
				  int (*poll)(struct napi_struct *, int),
				  int weight);

static inline void
netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi,
		      int (*poll)(struct napi_struct *, int), int weight)
{
	netdev_lock(dev);
	netif_napi_add_weight_locked(dev, napi, poll, weight);
	netdev_unlock(dev);
}

/**
 * netif_napi_add() - initialize a NAPI context
 * @dev:  network device
 * @napi: NAPI context
 * @poll: polling function
 *
 * netif_napi_add() must be used to initialize a NAPI context prior to calling
 * *any* of the other NAPI-related functions.
 */
static inline void
netif_napi_add(struct net_device *dev, struct napi_struct *napi,
	       int (*poll)(struct napi_struct *, int))
{
	netif_napi_add_weight(dev, napi, poll, NAPI_POLL_WEIGHT);
}

static inline void
netif_napi_add_locked(struct net_device *dev, struct napi_struct *napi,
		      int (*poll)(struct napi_struct *, int))
{
	netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT);
}

static inline void
netif_napi_add_tx_weight(struct net_device *dev,
			 struct napi_struct *napi,
			 int (*poll)(struct napi_struct *, int),
			 int weight)
{
	set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
	netif_napi_add_weight(dev, napi, poll, weight);
}

static inline void
netif_napi_add_config_locked(struct net_device *dev, struct napi_struct *napi,
			     int (*poll)(struct napi_struct *, int), int index)
{
	napi->index = index;
	napi->config = &dev->napi_config[index];
	netif_napi_add_weight_locked(dev, napi, poll, NAPI_POLL_WEIGHT);
}

/**
 * netif_napi_add_config - initialize a NAPI context with persistent config
 * @dev: network device
 * @napi: NAPI context
 * @poll: polling function
 * @index: the NAPI index
 */
static inline void
netif_napi_add_config(struct net_device *dev, struct napi_struct *napi,
		      int (*poll)(struct napi_struct *, int), int index)
{
	netdev_lock(dev);
	netif_napi_add_config_locked(dev, napi, poll, index);
	netdev_unlock(dev);
}

/**
 * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only
 * @dev:  network device
 * @napi: NAPI context
 * @poll: polling function
 *
 * This variant of netif_napi_add() should be used from drivers using NAPI
 * to exclusively poll a TX queue.
 * This will avoid we add it into napi_hash[], thus polluting this hash table.
 */
static inline void netif_napi_add_tx(struct net_device *dev,
				     struct napi_struct *napi,
				     int (*poll)(struct napi_struct *, int))
{
	netif_napi_add_tx_weight(dev, napi, poll, NAPI_POLL_WEIGHT);
}

void __netif_napi_del_locked(struct napi_struct *napi);

/**
 *  __netif_napi_del - remove a NAPI context
 *  @napi: NAPI context
 *
 * Warning: caller must observe RCU grace period before freeing memory
 * containing @napi. Drivers might want to call this helper to combine
 * all the needed RCU grace periods into a single one.
 */
static inline void __netif_napi_del(struct napi_struct *napi)
{
	netdev_lock(napi->dev);
	__netif_napi_del_locked(napi);
	netdev_unlock(napi->dev);
}

static inline void netif_napi_del_locked(struct napi_struct *napi)
{
	__netif_napi_del_locked(napi);
	synchronize_net();
}

/**
 *  netif_napi_del - remove a NAPI context
 *  @napi: NAPI context
 *
 *  netif_napi_del() removes a NAPI context from the network device NAPI list
 */
static inline void netif_napi_del(struct napi_struct *napi)
{
	__netif_napi_del(napi);
	synchronize_net();
}

struct packet_type {
	__be16			type;	/* This is really htons(ether_type). */
	bool			ignore_outgoing;
	struct net_device	*dev;	/* NULL is wildcarded here	     */
	netdevice_tracker	dev_tracker;
	int			(*func) (struct sk_buff *,
					 struct net_device *,
					 struct packet_type *,
					 struct net_device *);
	void			(*list_func) (struct list_head *,
					      struct packet_type *,
					      struct net_device *);
	bool			(*id_match)(struct packet_type *ptype,
					    struct sock *sk);
	struct net		*af_packet_net;
	void			*af_packet_priv;
	struct list_head	list;
};

struct offload_callbacks {
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
						netdev_features_t features);
	struct sk_buff		*(*gro_receive)(struct list_head *head,
						struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb, int nhoff);
};

struct packet_offload {
	__be16			 type;	/* This is really htons(ether_type). */
	u16			 priority;
	struct offload_callbacks callbacks;
	struct list_head	 list;
};

/* often modified stats are per-CPU, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
	u64_stats_t		rx_packets;
	u64_stats_t		rx_bytes;
	u64_stats_t		tx_packets;
	u64_stats_t		tx_bytes;
	struct u64_stats_sync   syncp;
} __aligned(4 * sizeof(u64));

struct pcpu_dstats {
	u64_stats_t		rx_packets;
	u64_stats_t		rx_bytes;
	u64_stats_t		tx_packets;
	u64_stats_t		tx_bytes;
	u64_stats_t		rx_drops;
	u64_stats_t		tx_drops;
	struct u64_stats_sync	syncp;
} __aligned(8 * sizeof(u64));

struct pcpu_lstats {
	u64_stats_t packets;
	u64_stats_t bytes;
	struct u64_stats_sync syncp;
} __aligned(2 * sizeof(u64));

void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);

static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len)
{
	struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);

	u64_stats_update_begin(&tstats->syncp);
	u64_stats_add(&tstats->rx_bytes, len);
	u64_stats_inc(&tstats->rx_packets);
	u64_stats_update_end(&tstats->syncp);
}

static inline void dev_sw_netstats_tx_add(struct net_device *dev,
					  unsigned int packets,
					  unsigned int len)
{
	struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);

	u64_stats_update_begin(&tstats->syncp);
	u64_stats_add(&tstats->tx_bytes, len);
	u64_stats_add(&tstats->tx_packets, packets);
	u64_stats_update_end(&tstats->syncp);
}

static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
{
	struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);

	u64_stats_update_begin(&lstats->syncp);
	u64_stats_add(&lstats->bytes, len);
	u64_stats_inc(&lstats->packets);
	u64_stats_update_end(&lstats->syncp);
}

static inline void dev_dstats_rx_add(struct net_device *dev,
				     unsigned int len)
{
	struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);

	u64_stats_update_begin(&dstats->syncp);
	u64_stats_inc(&dstats->rx_packets);
	u64_stats_add(&dstats->rx_bytes, len);
	u64_stats_update_end(&dstats->syncp);
}

static inline void dev_dstats_rx_dropped(struct net_device *dev)
{
	struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);

	u64_stats_update_begin(&dstats->syncp);
	u64_stats_inc(&dstats->rx_drops);
	u64_stats_update_end(&dstats->syncp);
}

static inline void dev_dstats_tx_add(struct net_device *dev,
				     unsigned int len)
{
	struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);

	u64_stats_update_begin(&dstats->syncp);
	u64_stats_inc(&dstats->tx_packets);
	u64_stats_add(&dstats->tx_bytes, len);
	u64_stats_update_end(&dstats->syncp);
}

static inline void dev_dstats_tx_dropped(struct net_device *dev)
{
	struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);

	u64_stats_update_begin(&dstats->syncp);
	u64_stats_inc(&dstats->tx_drops);
	u64_stats_update_end(&dstats->syncp);
}

#define __netdev_alloc_pcpu_stats(type, gfp)				\
({									\
	typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
	if (pcpu_stats)	{						\
		int __cpu;						\
		for_each_possible_cpu(__cpu) {				\
			typeof(type) *stat;				\
			stat = per_cpu_ptr(pcpu_stats, __cpu);		\
			u64_stats_init(&stat->syncp);			\
		}							\
	}								\
	pcpu_stats;							\
})

#define netdev_alloc_pcpu_stats(type)					\
	__netdev_alloc_pcpu_stats(type, GFP_KERNEL)

#define devm_netdev_alloc_pcpu_stats(dev, type)				\
({									\
	typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\
	if (pcpu_stats) {						\
		int __cpu;						\
		for_each_possible_cpu(__cpu) {				\
			typeof(type) *stat;				\
			stat = per_cpu_ptr(pcpu_stats, __cpu);		\
			u64_stats_init(&stat->syncp);			\
		}							\
	}								\
	pcpu_stats;							\
})

enum netdev_lag_tx_type {
	NETDEV_LAG_TX_TYPE_UNKNOWN,
	NETDEV_LAG_TX_TYPE_RANDOM,
	NETDEV_LAG_TX_TYPE_BROADCAST,
	NETDEV_LAG_TX_TYPE_ROUNDROBIN,
	NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
	NETDEV_LAG_TX_TYPE_HASH,
};

enum netdev_lag_hash {
	NETDEV_LAG_HASH_NONE,
	NETDEV_LAG_HASH_L2,
	NETDEV_LAG_HASH_L34,
	NETDEV_LAG_HASH_L23,
	NETDEV_LAG_HASH_E23,
	NETDEV_LAG_HASH_E34,
	NETDEV_LAG_HASH_VLAN_SRCMAC,
	NETDEV_LAG_HASH_UNKNOWN,
};

struct netdev_lag_upper_info {
	enum netdev_lag_tx_type tx_type;
	enum netdev_lag_hash hash_type;
};

struct netdev_lag_lower_state_info {
	u8 link_up : 1,
	   tx_enabled : 1;
};

#include <linux/notifier.h>

/* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
 * and the rtnetlink notification exclusion list in rtnetlink_event() when
 * adding new types.
 */
enum netdev_cmd {
	NETDEV_UP	= 1,	/* For now you can't veto a device up/down */
	NETDEV_DOWN,
	NETDEV_REBOOT,		/* Tell a protocol stack a network interface
				   detected a hardware crash and restarted
				   - we can use this eg to kick tcp sessions
				   once done */
	NETDEV_CHANGE,		/* Notify device state change */
	NETDEV_REGISTER,
	NETDEV_UNREGISTER,
	NETDEV_CHANGEMTU,	/* notify after mtu change happened */
	NETDEV_CHANGEADDR,	/* notify after the address change */
	NETDEV_PRE_CHANGEADDR,	/* notify before the address change */
	NETDEV_GOING_DOWN,
	NETDEV_CHANGENAME,
	NETDEV_FEAT_CHANGE,
	NETDEV_BONDING_FAILOVER,
	NETDEV_PRE_UP,
	NETDEV_PRE_TYPE_CHANGE,
	NETDEV_POST_TYPE_CHANGE,
	NETDEV_POST_INIT,
	NETDEV_PRE_UNINIT,
	NETDEV_RELEASE,
	NETDEV_NOTIFY_PEERS,
	NETDEV_JOIN,
	NETDEV_CHANGEUPPER,
	NETDEV_RESEND_IGMP,
	NETDEV_PRECHANGEMTU,	/* notify before mtu change happened */
	NETDEV_CHANGEINFODATA,
	NETDEV_BONDING_INFO,
	NETDEV_PRECHANGEUPPER,
	NETDEV_CHANGELOWERSTATE,
	NETDEV_UDP_TUNNEL_PUSH_INFO,
	NETDEV_UDP_TUNNEL_DROP_INFO,
	NETDEV_CHANGE_TX_QUEUE_LEN,
	NETDEV_CVLAN_FILTER_PUSH_INFO,
	NETDEV_CVLAN_FILTER_DROP_INFO,
	NETDEV_SVLAN_FILTER_PUSH_INFO,
	NETDEV_SVLAN_FILTER_DROP_INFO,
	NETDEV_OFFLOAD_XSTATS_ENABLE,
	NETDEV_OFFLOAD_XSTATS_DISABLE,
	NETDEV_OFFLOAD_XSTATS_REPORT_USED,
	NETDEV_OFFLOAD_XSTATS_REPORT_DELTA,
	NETDEV_XDP_FEAT_CHANGE,
};
const char *netdev_cmd_to_name(enum netdev_cmd cmd);

int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);
int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
int unregister_netdevice_notifier_net(struct net *net,
				      struct notifier_block *nb);
int register_netdevice_notifier_dev_net(struct net_device *dev,
					struct notifier_block *nb,
					struct netdev_net_notifier *nn);
int unregister_netdevice_notifier_dev_net(struct net_device *dev,
					  struct notifier_block *nb,
					  struct netdev_net_notifier *nn);

struct netdev_notifier_info {
	struct net_device	*dev;
	struct netlink_ext_ack	*extack;
};

struct netdev_notifier_info_ext {
	struct netdev_notifier_info info; /* must be first */
	union {
		u32 mtu;
	} ext;
};

struct netdev_notifier_change_info {
	struct netdev_notifier_info info; /* must be first */
	unsigned int flags_changed;
};

struct netdev_notifier_changeupper_info {
	struct netdev_notifier_info info; /* must be first */
	struct net_device *upper_dev; /* new upper dev */
	bool master; /* is upper dev master */
	bool linking; /* is the notification for link or unlink */
	void *upper_info; /* upper dev info */
};

struct netdev_notifier_changelowerstate_info {
	struct netdev_notifier_info info; /* must be first */
	void *lower_state_info; /* is lower dev state */
};

struct netdev_notifier_pre_changeaddr_info {
	struct netdev_notifier_info info; /* must be first */
	const unsigned char *dev_addr;
};

enum netdev_offload_xstats_type {
	NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1,
};

struct netdev_notifier_offload_xstats_info {
	struct netdev_notifier_info info; /* must be first */
	enum netdev_offload_xstats_type type;

	union {
		/* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */
		struct netdev_notifier_offload_xstats_rd *report_delta;
		/* NETDEV_OFFLOAD_XSTATS_REPORT_USED */
		struct netdev_notifier_offload_xstats_ru *report_used;
	};
};

int netdev_offload_xstats_enable(struct net_device *dev,
				 enum netdev_offload_xstats_type type,
				 struct netlink_ext_ack *extack);
int netdev_offload_xstats_disable(struct net_device *dev,
				  enum netdev_offload_xstats_type type);
bool netdev_offload_xstats_enabled(const struct net_device *dev,
				   enum netdev_offload_xstats_type type);
int netdev_offload_xstats_get(struct net_device *dev,
			      enum netdev_offload_xstats_type type,
			      struct rtnl_hw_stats64 *stats, bool *used,
			      struct netlink_ext_ack *extack);
void
netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd,
				   const struct rtnl_hw_stats64 *stats);
void
netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru);
void netdev_offload_xstats_push_delta(struct net_device *dev,
				      enum netdev_offload_xstats_type type,
				      const struct rtnl_hw_stats64 *stats);

static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
					     struct net_device *dev)
{
	info->dev = dev;
	info->extack = NULL;
}

static inline struct net_device *
netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
{
	return info->dev;
}

static inline struct netlink_ext_ack *
netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
{
	return info->extack;
}

int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
int call_netdevice_notifiers_info(unsigned long val,
				  struct netdev_notifier_info *info);

#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_safe(net, d, n)	\
		list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
#define for_each_netdev_continue(net, d)		\
		list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_continue_reverse(net, d)		\
		list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
						     dev_list)
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
#define for_each_netdev_in_bond_rcu(bond, slave)	\
		for_each_netdev_rcu(&init_net, slave)	\
			if (netdev_master_upper_dev_get_rcu(slave) == (bond))
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)

#define for_each_netdev_dump(net, d, ifindex)				\
	for (; (d = xa_find(&(net)->dev_by_index, &ifindex,		\
			    ULONG_MAX, XA_PRESENT)); ifindex++)

static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

static inline struct net_device *first_net_device(struct net *net)
{
	return list_empty(&net->dev_base_head) ? NULL :
		net_device_entry(net->dev_base_head.next);
}

static inline struct net_device *first_net_device_rcu(struct net *net)
{
	struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));

	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

int netdev_boot_setup_check(struct net_device *dev);
struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type,
				   const char *hwaddr);
struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
				       const char *hwaddr);
struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
void dev_add_pack(struct packet_type *pt);
void dev_remove_pack(struct packet_type *pt);
void __dev_remove_pack(struct packet_type *pt);
void dev_add_offload(struct packet_offload *po);
void dev_remove_offload(struct packet_offload *po);

int dev_get_iflink(const struct net_device *dev);
int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr,
			  struct net_device_path_stack *stack);
struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
				      unsigned short mask);
struct net_device *dev_get_by_name(struct net *net, const char *name);
struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
struct net_device *__dev_get_by_name(struct net *net, const char *name);
bool netdev_name_in_use(struct net *net, const char *name);
int dev_alloc_name(struct net_device *dev, const char *name);
int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
void dev_close(struct net_device *dev);
void dev_close_many(struct list_head *head, bool unlink);
void dev_disable_lro(struct net_device *dev);
int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
		     struct net_device *sb_dev);

int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev);
int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);

static inline int dev_queue_xmit(struct sk_buff *skb)
{
	return __dev_queue_xmit(skb, NULL);
}

static inline int dev_queue_xmit_accel(struct sk_buff *skb,
				       struct net_device *sb_dev)
{
	return __dev_queue_xmit(skb, sb_dev);
}

static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
{
	int ret;

	ret = __dev_direct_xmit(skb, queue_id);
	if (!dev_xmit_complete(ret))
		kfree_skb(skb);
	return ret;
}

int register_netdevice(struct net_device *dev);
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
void unregister_netdevice_many(struct list_head *head);
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

int netdev_refcnt_read(const struct net_device *dev);
void free_netdev(struct net_device *dev);

struct net_device *netdev_get_xmit_slave(struct net_device *dev,
					 struct sk_buff *skb,
					 bool all_slaves);
struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev,
					    struct sock *sk);
struct net_device *dev_get_by_index(struct net *net, int ifindex);
struct net_device *__dev_get_by_index(struct net *net, int ifindex);
struct net_device *netdev_get_by_index(struct net *net, int ifindex,
				       netdevice_tracker *tracker, gfp_t gfp);
struct net_device *netdev_get_by_name(struct net *net, const char *name,
				      netdevice_tracker *tracker, gfp_t gfp);
struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
void netdev_copy_name(struct net_device *dev, char *name);

static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
				  const void *daddr, const void *saddr,
				  unsigned int len)
{
	if (!dev->header_ops || !dev->header_ops->create)
		return 0;

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
}

static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

	if (!dev->header_ops || !dev->header_ops->parse)
		return 0;
	return dev->header_ops->parse(skb, haddr);
}

static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
{
	const struct net_device *dev = skb->dev;

	if (!dev->header_ops || !dev->header_ops->parse_protocol)
		return 0;
	return dev->header_ops->parse_protocol(skb);
}

/* ll_header must have at least hard_header_len allocated */
static inline bool dev_validate_header(const struct net_device *dev,
				       char *ll_header, int len)
{
	if (likely(len >= dev->hard_header_len))
		return true;
	if (len < dev->min_header_len)
		return false;

	if (capable(CAP_SYS_RAWIO)) {
		memset(ll_header + len, 0, dev->hard_header_len - len);
		return true;
	}

	if (dev->header_ops && dev->header_ops->validate)
		return dev->header_ops->validate(ll_header, len);

	return false;
}

static inline bool dev_has_header(const struct net_device *dev)
{
	return dev->header_ops && dev->header_ops->create;
}

/*
 * Incoming packets are placed on per-CPU queues
 */
struct softnet_data {
	struct list_head	poll_list;
	struct sk_buff_head	process_queue;
	local_lock_t		process_queue_bh_lock;

	/* stats */
	unsigned int		processed;
	unsigned int		time_squeeze;
#ifdef CONFIG_RPS
	struct softnet_data	*rps_ipi_list;
#endif

	unsigned int		received_rps;
	bool			in_net_rx_action;
	bool			in_napi_threaded_poll;

#ifdef CONFIG_NET_FLOW_LIMIT
	struct sd_flow_limit __rcu *flow_limit;
#endif
	struct Qdisc		*output_queue;
	struct Qdisc		**output_queue_tailp;
	struct sk_buff		*completion_queue;
#ifdef CONFIG_XFRM_OFFLOAD
	struct sk_buff_head	xfrm_backlog;
#endif
	/* written and read only by owning cpu: */
	struct netdev_xmit xmit;
#ifdef CONFIG_RPS
	/* input_queue_head should be written by cpu owning this struct,
	 * and only read by other cpus. Worth using a cache line.
	 */
	unsigned int		input_queue_head ____cacheline_aligned_in_smp;

	/* Elements below can be accessed between CPUs for RPS/RFS */
	call_single_data_t	csd ____cacheline_aligned_in_smp;
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
	unsigned int		input_queue_tail;
#endif
	struct sk_buff_head	input_pkt_queue;
	struct napi_struct	backlog;

	atomic_t		dropped ____cacheline_aligned_in_smp;

	/* Another possibly contended cache line */
	spinlock_t		defer_lock ____cacheline_aligned_in_smp;
	int			defer_count;
	int			defer_ipi_scheduled;
	struct sk_buff		*defer_list;
	call_single_data_t	defer_csd;
};

DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
DECLARE_PER_CPU(struct page_pool *, system_page_pool);

#ifndef CONFIG_PREEMPT_RT
static inline int dev_recursion_level(void)
{
	return this_cpu_read(softnet_data.xmit.recursion);
}
#else
static inline int dev_recursion_level(void)
{
	return current->net_xmit.recursion;
}

#endif

void __netif_schedule(struct Qdisc *q);
void netif_schedule_queue(struct netdev_queue *txq);

static inline void netif_tx_schedule_all(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++)
		netif_schedule_queue(netdev_get_tx_queue(dev, i));
}

static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
}

/**
 *	netif_start_queue - allow transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 */
static inline void netif_start_queue(struct net_device *dev)
{
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
}

static inline void netif_tx_start_all_queues(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		netif_tx_start_queue(txq);
	}
}

void netif_tx_wake_queue(struct netdev_queue *dev_queue);

/**
 *	netif_wake_queue - restart transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 *	Used for flow control when transmit resources are available.
 */
static inline void netif_wake_queue(struct net_device *dev)
{
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
}

static inline void netif_tx_wake_all_queues(struct net_device *dev)
{
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
		netif_tx_wake_queue(txq);
	}
}

static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
	/* Paired with READ_ONCE() from dev_watchdog() */
	WRITE_ONCE(dev_queue->trans_start, jiffies);

	/* This barrier is paired with smp_mb() from dev_watchdog() */
	smp_mb__before_atomic();

	/* Must be an atomic op see netif_txq_try_stop() */
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
}

/**
 *	netif_stop_queue - stop transmitted packets
 *	@dev: network device
 *
 *	Stop upper layers calling the device hard_start_xmit routine.
 *	Used for flow control when transmit resources are unavailable.
 */
static inline void netif_stop_queue(struct net_device *dev)
{
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
}

void netif_tx_stop_all_queues(struct net_device *dev);

static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
}

/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
static inline bool netif_queue_stopped(const struct net_device *dev)
{
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
}

static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

static inline bool
netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
}

static inline bool
netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
{
	return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
}

/**
 *	netdev_queue_set_dql_min_limit - set dql minimum limit
 *	@dev_queue: pointer to transmit queue
 *	@min_limit: dql minimum limit
 *
 * Forces xmit_more() to return true until the minimum threshold
 * defined by @min_limit is reached (or until the tx queue is
 * empty). Warning: to be use with care, misuse will impact the
 * latency.
 */
static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue,
						  unsigned int min_limit)
{
#ifdef CONFIG_BQL
	dev_queue->dql.min_limit = min_limit;
#endif
}

static inline int netdev_queue_dql_avail(const struct netdev_queue *txq)
{
#ifdef CONFIG_BQL
	/* Non-BQL migrated drivers will return 0, too. */
	return dql_avail(&txq->dql);
#else
	return 0;
#endif
}

/**
 *	netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
 *	@dev_queue: pointer to transmit queue
 *
 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
 * to give appropriate hint to the CPU.
 */
static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
{
#ifdef CONFIG_BQL
	prefetchw(&dev_queue->dql.num_queued);
#endif
}

/**
 *	netdev_txq_bql_complete_prefetchw - prefetch bql data for write
 *	@dev_queue: pointer to transmit queue
 *
 * BQL enabled drivers might use this helper in their TX completion path,
 * to give appropriate hint to the CPU.
 */
static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
{
#ifdef CONFIG_BQL
	prefetchw(&dev_queue->dql.limit);
#endif
}

/**
 *	netdev_tx_sent_queue - report the number of bytes queued to a given tx queue
 *	@dev_queue: network device queue
 *	@bytes: number of bytes queued to the device queue
 *
 *	Report the number of bytes queued for sending/completion to the network
 *	device hardware queue. @bytes should be a good approximation and should
 *	exactly match netdev_completed_queue() @bytes.
 *	This is typically called once per packet, from ndo_start_xmit().
 */
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);

	if (likely(dql_avail(&dev_queue->dql) >= 0))
		return;

	/* Paired with READ_ONCE() from dev_watchdog() */
	WRITE_ONCE(dev_queue->trans_start, jiffies);

	/* This barrier is paired with smp_mb() from dev_watchdog() */
	smp_mb__before_atomic();

	set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);

	/*
	 * The XOFF flag must be set before checking the dql_avail below,
	 * because in netdev_tx_completed_queue we update the dql_completed
	 * before checking the XOFF flag.
	 */
	smp_mb__after_atomic();

	/* check again in case another CPU has just made room avail */
	if (unlikely(dql_avail(&dev_queue->dql) >= 0))
		clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
#endif
}

/* Variant of netdev_tx_sent_queue() for drivers that are aware
 * that they should not test BQL status themselves.
 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
 * skb of a batch.
 * Returns true if the doorbell must be used to kick the NIC.
 */
static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					  unsigned int bytes,
					  bool xmit_more)
{
	if (xmit_more) {
#ifdef CONFIG_BQL
		dql_queued(&dev_queue->dql, bytes);
#endif
		return netif_tx_queue_stopped(dev_queue);
	}
	netdev_tx_sent_queue(dev_queue, bytes);
	return true;
}

/**
 *	netdev_sent_queue - report the number of bytes queued to hardware
 *	@dev: network device
 *	@bytes: number of bytes queued to the hardware device queue
 *
 *	Report the number of bytes queued for sending/completion to the network
 *	device hardware queue#0. @bytes should be a good approximation and should
 *	exactly match netdev_completed_queue() @bytes.
 *	This is typically called once per packet, from ndo_start_xmit().
 */
static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
{
	netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
}

static inline bool __netdev_sent_queue(struct net_device *dev,
				       unsigned int bytes,
				       bool xmit_more)
{
	return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
				      xmit_more);
}

/**
 *	netdev_tx_completed_queue - report number of packets/bytes at TX completion.
 *	@dev_queue: network device queue
 *	@pkts: number of packets (currently ignored)
 *	@bytes: number of bytes dequeued from the device queue
 *
 *	Must be called at most once per TX completion round (and not per
 *	individual packet), so that BQL can adjust its limits appropriately.
 */
static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
					     unsigned int pkts, unsigned int bytes)
{
#ifdef CONFIG_BQL
	if (unlikely(!bytes))
		return;

	dql_completed(&dev_queue->dql, bytes);

	/*
	 * Without the memory barrier there is a small possibility that
	 * netdev_tx_sent_queue will miss the update and cause the queue to
	 * be stopped forever
	 */
	smp_mb(); /* NOTE: netdev_txq_completed_mb() assumes this exists */

	if (unlikely(dql_avail(&dev_queue->dql) < 0))
		return;

	if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
		netif_schedule_queue(dev_queue);
#endif
}

/**
 * 	netdev_completed_queue - report bytes and packets completed by device
 * 	@dev: network device
 * 	@pkts: actual number of packets sent over the medium
 * 	@bytes: actual number of bytes sent over the medium
 *
 * 	Report the number of bytes and packets transmitted by the network device
 * 	hardware queue over the physical medium, @bytes must exactly match the
 * 	@bytes amount passed to netdev_sent_queue()
 */
static inline void netdev_completed_queue(struct net_device *dev,
					  unsigned int pkts, unsigned int bytes)
{
	netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
}

static inline void netdev_tx_reset_queue(struct netdev_queue *q)
{
#ifdef CONFIG_BQL
	clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
	dql_reset(&q->dql);
#endif
}

/**
 * netdev_tx_reset_subqueue - reset the BQL stats and state of a netdev queue
 * @dev: network device
 * @qid: stack index of the queue to reset
 */
static inline void netdev_tx_reset_subqueue(const struct net_device *dev,
					    u32 qid)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev, qid));
}

/**
 * 	netdev_reset_queue - reset the packets and bytes count of a network device
 * 	@dev_queue: network device
 *
 * 	Reset the bytes and packet count of a network device and clear the
 * 	software flow control OFF bit for this network device
 */
static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_subqueue(dev_queue, 0);
}

/**
 * 	netdev_cap_txqueue - check if selected tx queue exceeds device queues
 * 	@dev: network device
 * 	@queue_index: given tx queue index
 *
 * 	Returns 0 if given tx queue index >= number of device tx queues,
 * 	otherwise returns the originally passed tx queue index.
 */
static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
{
	if (unlikely(queue_index >= dev->real_num_tx_queues)) {
		net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
				     dev->name, queue_index,
				     dev->real_num_tx_queues);
		return 0;
	}

	return queue_index;
}

/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
static inline bool netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

/*
 * Routines to manage the subqueues on a device.  We only need start,
 * stop, and a check if it's stopped.  All other device management is
 * done at the overall netdevice level.
 * Also test the device if we're multiqueue.
 */

/**
 *	netif_start_subqueue - allow sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Start individual transmit queue of a device with multiple transmit queues.
 */
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);

	netif_tx_start_queue(txq);
}

/**
 *	netif_stop_subqueue - stop sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Stop individual transmit queue of a device with multiple transmit queues.
 */
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
	netif_tx_stop_queue(txq);
}

/**
 *	__netif_subqueue_stopped - test status of subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Check individual transmit queue of a device with multiple transmit queues.
 */
static inline bool __netif_subqueue_stopped(const struct net_device *dev,
					    u16 queue_index)
{
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);

	return netif_tx_queue_stopped(txq);
}

/**
 *	netif_subqueue_stopped - test status of subqueue
 *	@dev: network device
 *	@skb: sub queue buffer pointer
 *
 * Check individual transmit queue of a device with multiple transmit queues.
 */
static inline bool netif_subqueue_stopped(const struct net_device *dev,
					  struct sk_buff *skb)
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}

/**
 *	netif_wake_subqueue - allow sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Resume individual transmit queue of a device with multiple transmit queues.
 */
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);

	netif_tx_wake_queue(txq);
}

#ifdef CONFIG_XPS
int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
			u16 index);
int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
			  u16 index, enum xps_map_type type);

/**
 *	netif_attr_test_mask - Test a CPU or Rx queue set in a mask
 *	@j: CPU/Rx queue index
 *	@mask: bitmask of all cpus/rx queues
 *	@nr_bits: number of bits in the bitmask
 *
 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
 */
static inline bool netif_attr_test_mask(unsigned long j,
					const unsigned long *mask,
					unsigned int nr_bits)
{
	cpu_max_bits_warn(j, nr_bits);
	return test_bit(j, mask);
}

/**
 *	netif_attr_test_online - Test for online CPU/Rx queue
 *	@j: CPU/Rx queue index
 *	@online_mask: bitmask for CPUs/Rx queues that are online
 *	@nr_bits: number of bits in the bitmask
 *
 * Returns: true if a CPU/Rx queue is online.
 */
static inline bool netif_attr_test_online(unsigned long j,
					  const unsigned long *online_mask,
					  unsigned int nr_bits)
{
	cpu_max_bits_warn(j, nr_bits);

	if (online_mask)
		return test_bit(j, online_mask);

	return (j < nr_bits);
}

/**
 *	netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
 *	@n: CPU/Rx queue index
 *	@srcp: the cpumask/Rx queue mask pointer
 *	@nr_bits: number of bits in the bitmask
 *
 * Returns: next (after n) CPU/Rx queue index in the mask;
 * >= nr_bits if no further CPUs/Rx queues set.
 */
static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
					       unsigned int nr_bits)
{
	/* -1 is a legal arg here. */
	if (n != -1)
		cpu_max_bits_warn(n, nr_bits);

	if (srcp)
		return find_next_bit(srcp, nr_bits, n + 1);

	return n + 1;
}

/**
 *	netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
 *	@n: CPU/Rx queue index
 *	@src1p: the first CPUs/Rx queues mask pointer
 *	@src2p: the second CPUs/Rx queues mask pointer
 *	@nr_bits: number of bits in the bitmask
 *
 * Returns: next (after n) CPU/Rx queue index set in both masks;
 * >= nr_bits if no further CPUs/Rx queues set in both.
 */
static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
					  const unsigned long *src2p,
					  unsigned int nr_bits)
{
	/* -1 is a legal arg here. */
	if (n != -1)
		cpu_max_bits_warn(n, nr_bits);

	if (src1p && src2p)
		return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
	else if (src1p)
		return find_next_bit(src1p, nr_bits, n + 1);
	else if (src2p)
		return find_next_bit(src2p, nr_bits, n + 1);

	return n + 1;
}
#else
static inline int netif_set_xps_queue(struct net_device *dev,
				      const struct cpumask *mask,
				      u16 index)
{
	return 0;
}

static inline int __netif_set_xps_queue(struct net_device *dev,
					const unsigned long *mask,
					u16 index, enum xps_map_type type)
{
	return 0;
}
#endif

/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
static inline bool netif_is_multiqueue(const struct net_device *dev)
{
	return dev->num_tx_queues > 1;
}

int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);

#ifdef CONFIG_SYSFS
int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxqs)
{
	dev->real_num_rx_queues = rxqs;
	return 0;
}
#endif
int netif_set_real_num_queues(struct net_device *dev,
			      unsigned int txq, unsigned int rxq);

int netif_get_num_default_rss_queues(void);

void dev_kfree_skb_irq_reason(struct sk_buff *skb, enum skb_drop_reason reason);
void dev_kfree_skb_any_reason(struct sk_buff *skb, enum skb_drop_reason reason);

/*
 * It is not allowed to call kfree_skb() or consume_skb() from hardware
 * interrupt context or with hardware interrupts being disabled.
 * (in_hardirq() || irqs_disabled())
 *
 * We provide four helpers that can be used in following contexts :
 *
 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
 *  Typically used in place of consume_skb(skb) in TX completion path
 *
 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
 *  and consumed a packet. Used in place of consume_skb(skb)
 */
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
{
	dev_kfree_skb_irq_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);
}

static inline void dev_consume_skb_irq(struct sk_buff *skb)
{
	dev_kfree_skb_irq_reason(skb, SKB_CONSUMED);
}

static inline void dev_kfree_skb_any(struct sk_buff *skb)
{
	dev_kfree_skb_any_reason(skb, SKB_DROP_REASON_NOT_SPECIFIED);
}

static inline void dev_consume_skb_any(struct sk_buff *skb)
{
	dev_kfree_skb_any_reason(skb, SKB_CONSUMED);
}

u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp,
			     const struct bpf_prog *xdp_prog);
void generic_xdp_tx(struct sk_buff *skb, const struct bpf_prog *xdp_prog);
int do_xdp_generic(const struct bpf_prog *xdp_prog, struct sk_buff **pskb);
int netif_rx(struct sk_buff *skb);
int __netif_rx(struct sk_buff *skb);

int netif_receive_skb(struct sk_buff *skb);
int netif_receive_skb_core(struct sk_buff *skb);
void netif_receive_skb_list_internal(struct list_head *head);
void netif_receive_skb_list(struct list_head *head);
gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
void napi_gro_flush(struct napi_struct *napi, bool flush_old);
struct sk_buff *napi_get_frags(struct napi_struct *napi);
gro_result_t napi_gro_frags(struct napi_struct *napi);

static inline void napi_free_frags(struct napi_struct *napi)
{
	kfree_skb(napi->skb);
	napi->skb = NULL;
}

bool netdev_is_rx_handler_busy(struct net_device *dev);
int netdev_rx_handler_register(struct net_device *dev,
			       rx_handler_func_t *rx_handler,
			       void *rx_handler_data);
void netdev_rx_handler_unregister(struct net_device *dev);

bool dev_valid_name(const char *name);
static inline bool is_socket_ioctl_cmd(unsigned int cmd)
{
	return _IOC_TYPE(cmd) == SOCK_IOC_TYPE;
}
int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg);
int put_user_ifreq(struct ifreq *ifr, void __user *arg);
int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
		void __user *data, bool *need_copyout);
int dev_ifconf(struct net *net, struct ifconf __user *ifc);
int generic_hwtstamp_get_lower(struct net_device *dev,
			       struct kernel_hwtstamp_config *kernel_cfg);
int generic_hwtstamp_set_lower(struct net_device *dev,
			       struct kernel_hwtstamp_config *kernel_cfg,
			       struct netlink_ext_ack *extack);
int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata);
unsigned int dev_get_flags(const struct net_device *);
int __dev_change_flags(struct net_device *dev, unsigned int flags,
		       struct netlink_ext_ack *extack);
int dev_change_flags(struct net_device *dev, unsigned int flags,
		     struct netlink_ext_ack *extack);
int dev_set_alias(struct net_device *, const char *, size_t);
int dev_get_alias(const struct net_device *, char *, size_t);
int __dev_change_net_namespace(struct net_device *dev, struct net *net,
			       const char *pat, int new_ifindex);
static inline
int dev_change_net_namespace(struct net_device *dev, struct net *net,
			     const char *pat)
{
	return __dev_change_net_namespace(dev, net, pat, 0);
}
int __dev_set_mtu(struct net_device *, int);
int dev_set_mtu(struct net_device *, int);
int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
			      struct netlink_ext_ack *extack);
int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
			struct netlink_ext_ack *extack);
int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
			     struct netlink_ext_ack *extack);
int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);
int dev_get_port_parent_id(struct net_device *dev,
			   struct netdev_phys_item_id *ppid, bool recurse);
bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);

struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
				    struct netdev_queue *txq, int *ret);

int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
u8 dev_xdp_prog_count(struct net_device *dev);
int dev_xdp_propagate(struct net_device *dev, struct netdev_bpf *bpf);
u8 dev_xdp_sb_prog_count(struct net_device *dev);
u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);

u32 dev_get_min_mp_channel_count(const struct net_device *dev);

int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb);
bool is_skb_forwardable(const struct net_device *dev,
			const struct sk_buff *skb);

static __always_inline bool __is_skb_forwardable(const struct net_device *dev,
						 const struct sk_buff *skb,
						 const bool check_mtu)
{
	const u32 vlan_hdr_len = 4; /* VLAN_HLEN */
	unsigned int len;

	if (!(dev->flags & IFF_UP))
		return false;

	if (!check_mtu)
		return true;

	len = dev->mtu + dev->hard_header_len + vlan_hdr_len;
	if (skb->len <= len)
		return true;

	/* if TSO is enabled, we don't care about the length as the packet
	 * could be forwarded without being segmented before
	 */
	if (skb_is_gso(skb))
		return true;

	return false;
}

void netdev_core_stats_inc(struct net_device *dev, u32 offset);

#define DEV_CORE_STATS_INC(FIELD)						\
static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev)		\
{										\
	netdev_core_stats_inc(dev,						\
			offsetof(struct net_device_core_stats, FIELD));		\
}
DEV_CORE_STATS_INC(rx_dropped)
DEV_CORE_STATS_INC(tx_dropped)
DEV_CORE_STATS_INC(rx_nohandler)
DEV_CORE_STATS_INC(rx_otherhost_dropped)
#undef DEV_CORE_STATS_INC

static __always_inline int ____dev_forward_skb(struct net_device *dev,
					       struct sk_buff *skb,
					       const bool check_mtu)
{
	if (skb_orphan_frags(skb, GFP_ATOMIC) ||
	    unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) {
		dev_core_stats_rx_dropped_inc(dev);
		kfree_skb(skb);
		return NET_RX_DROP;
	}

	skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev)));
	skb->priority = 0;
	return 0;
}

bool dev_nit_active(struct net_device *dev);
void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);

static inline void __dev_put(struct net_device *dev)
{
	if (dev) {
#ifdef CONFIG_PCPU_DEV_REFCNT
		this_cpu_dec(*dev->pcpu_refcnt);
#else
		refcount_dec(&dev->dev_refcnt);
#endif
	}
}

static inline void __dev_hold(struct net_device *dev)
{
	if (dev) {
#ifdef CONFIG_PCPU_DEV_REFCNT
		this_cpu_inc(*dev->pcpu_refcnt);
#else
		refcount_inc(&dev->dev_refcnt);
#endif
	}
}

static inline void __netdev_tracker_alloc(struct net_device *dev,
					  netdevice_tracker *tracker,
					  gfp_t gfp)
{
#ifdef CONFIG_NET_DEV_REFCNT_TRACKER
	ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp);
#endif
}

/* netdev_tracker_alloc() can upgrade a prior untracked reference
 * taken by dev_get_by_name()/dev_get_by_index() to a tracked one.
 */
static inline void netdev_tracker_alloc(struct net_device *dev,
					netdevice_tracker *tracker, gfp_t gfp)
{
#ifdef CONFIG_NET_DEV_REFCNT_TRACKER
	refcount_dec(&dev->refcnt_tracker.no_tracker);
	__netdev_tracker_alloc(dev, tracker, gfp);
#endif
}

static inline void netdev_tracker_free(struct net_device *dev,
				       netdevice_tracker *tracker)
{
#ifdef CONFIG_NET_DEV_REFCNT_TRACKER
	ref_tracker_free(&dev->refcnt_tracker, tracker);
#endif
}

static inline void netdev_hold(struct net_device *dev,
			       netdevice_tracker *tracker, gfp_t gfp)
{
	if (dev) {
		__dev_hold(dev);
		__netdev_tracker_alloc(dev, tracker, gfp);
	}
}

static inline void netdev_put(struct net_device *dev,
			      netdevice_tracker *tracker)
{
	if (dev) {
		netdev_tracker_free(dev, tracker);
		__dev_put(dev);
	}
}

/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
 * Hold reference to device to keep it from being freed.
 * Try using netdev_hold() instead.
 */
static inline void dev_hold(struct net_device *dev)
{
	netdev_hold(dev, NULL, GFP_ATOMIC);
}

/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
 * Release reference to device to allow it to be freed.
 * Try using netdev_put() instead.
 */
static inline void dev_put(struct net_device *dev)
{
	netdev_put(dev, NULL);
}

DEFINE_FREE(dev_put, struct net_device *, if (_T) dev_put(_T))

static inline void netdev_ref_replace(struct net_device *odev,
				      struct net_device *ndev,
				      netdevice_tracker *tracker,
				      gfp_t gfp)
{
	if (odev)
		netdev_tracker_free(odev, tracker);

	__dev_hold(ndev);
	__dev_put(odev);

	if (ndev)
		__netdev_tracker_alloc(ndev, tracker, gfp);
}

/* Carrier loss detection, dial on demand. The functions netif_carrier_on
 * and _off may be called from IRQ context, but it is caller
 * who is responsible for serialization of these calls.
 *
 * The name carrier is inappropriate, these functions should really be
 * called netif_lowerlayer_*() because they represent the state of any
 * kind of lower layer not just hardware media.
 */
void linkwatch_fire_event(struct net_device *dev);

/**
 * linkwatch_sync_dev - sync linkwatch for the given device
 * @dev: network device to sync linkwatch for
 *
 * Sync linkwatch for the given device, removing it from the
 * pending work list (if queued).
 */
void linkwatch_sync_dev(struct net_device *dev);

/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
static inline bool netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

unsigned long dev_trans_start(struct net_device *dev);

void netdev_watchdog_up(struct net_device *dev);

void netif_carrier_on(struct net_device *dev);
void netif_carrier_off(struct net_device *dev);
void netif_carrier_event(struct net_device *dev);

/**
 *	netif_dormant_on - mark device as dormant.
 *	@dev: network device
 *
 * Mark device as dormant (as per RFC2863).
 *
 * The dormant state indicates that the relevant interface is not
 * actually in a condition to pass packets (i.e., it is not 'up') but is
 * in a "pending" state, waiting for some external event.  For "on-
 * demand" interfaces, this new state identifies the situation where the
 * interface is waiting for events to place it in the up state.
 */
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

/**
 *	netif_dormant - test if device is dormant
 *	@dev: network device
 *
 * Check if device is dormant.
 */
static inline bool netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


/**
 *	netif_testing_on - mark device as under test.
 *	@dev: network device
 *
 * Mark device as under test (as per RFC2863).
 *
 * The testing state indicates that some test(s) must be performed on
 * the interface. After completion, of the test, the interface state
 * will change to up, dormant, or down, as appropriate.
 */
static inline void netif_testing_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))
		linkwatch_fire_event(dev);
}

/**
 *	netif_testing_off - set device as not under test.
 *	@dev: network device
 *
 * Device is not in testing state.
 */
static inline void netif_testing_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))
		linkwatch_fire_event(dev);
}

/**
 *	netif_testing - test if device is under test
 *	@dev: network device
 *
 * Check if device is under test
 */
static inline bool netif_testing(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_TESTING, &dev->state);
}


/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
static inline bool netif_oper_up(const struct net_device *dev)
{
	unsigned int operstate = READ_ONCE(dev->operstate);

	return	operstate == IF_OPER_UP ||
		operstate == IF_OPER_UNKNOWN /* backward compat */;
}

/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
static inline bool netif_device_present(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

void netif_device_detach(struct net_device *dev);

void netif_device_attach(struct net_device *dev);

/*
 * Network interface message level settings
 */

enum {
	NETIF_MSG_DRV_BIT,
	NETIF_MSG_PROBE_BIT,
	NETIF_MSG_LINK_BIT,
	NETIF_MSG_TIMER_BIT,
	NETIF_MSG_IFDOWN_BIT,
	NETIF_MSG_IFUP_BIT,
	NETIF_MSG_RX_ERR_BIT,
	NETIF_MSG_TX_ERR_BIT,
	NETIF_MSG_TX_QUEUED_BIT,
	NETIF_MSG_INTR_BIT,
	NETIF_MSG_TX_DONE_BIT,
	NETIF_MSG_RX_STATUS_BIT,
	NETIF_MSG_PKTDATA_BIT,
	NETIF_MSG_HW_BIT,
	NETIF_MSG_WOL_BIT,

	/* When you add a new bit above, update netif_msg_class_names array
	 * in net/ethtool/common.c
	 */
	NETIF_MSG_CLASS_COUNT,
};
/* Both ethtool_ops interface and internal driver implementation use u32 */
static_assert(NETIF_MSG_CLASS_COUNT <= 32);

#define __NETIF_MSG_BIT(bit)	((u32)1 << (bit))
#define __NETIF_MSG(name)	__NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)

#define NETIF_MSG_DRV		__NETIF_MSG(DRV)
#define NETIF_MSG_PROBE		__NETIF_MSG(PROBE)
#define NETIF_MSG_LINK		__NETIF_MSG(LINK)
#define NETIF_MSG_TIMER		__NETIF_MSG(TIMER)
#define NETIF_MSG_IFDOWN	__NETIF_MSG(IFDOWN)
#define NETIF_MSG_IFUP		__NETIF_MSG(IFUP)
#define NETIF_MSG_RX_ERR	__NETIF_MSG(RX_ERR)
#define NETIF_MSG_TX_ERR	__NETIF_MSG(TX_ERR)
#define NETIF_MSG_TX_QUEUED	__NETIF_MSG(TX_QUEUED)
#define NETIF_MSG_INTR		__NETIF_MSG(INTR)
#define NETIF_MSG_TX_DONE	__NETIF_MSG(TX_DONE)
#define NETIF_MSG_RX_STATUS	__NETIF_MSG(RX_STATUS)
#define NETIF_MSG_PKTDATA	__NETIF_MSG(PKTDATA)
#define NETIF_MSG_HW		__NETIF_MSG(HW)
#define NETIF_MSG_WOL		__NETIF_MSG(WOL)

#define netif_msg_drv(p)	((p)->msg_enable & NETIF_MSG_DRV)
#define netif_msg_probe(p)	((p)->msg_enable & NETIF_MSG_PROBE)
#define netif_msg_link(p)	((p)->msg_enable & NETIF_MSG_LINK)
#define netif_msg_timer(p)	((p)->msg_enable & NETIF_MSG_TIMER)
#define netif_msg_ifdown(p)	((p)->msg_enable & NETIF_MSG_IFDOWN)
#define netif_msg_ifup(p)	((p)->msg_enable & NETIF_MSG_IFUP)
#define netif_msg_rx_err(p)	((p)->msg_enable & NETIF_MSG_RX_ERR)
#define netif_msg_tx_err(p)	((p)->msg_enable & NETIF_MSG_TX_ERR)
#define netif_msg_tx_queued(p)	((p)->msg_enable & NETIF_MSG_TX_QUEUED)
#define netif_msg_intr(p)	((p)->msg_enable & NETIF_MSG_INTR)
#define netif_msg_tx_done(p)	((p)->msg_enable & NETIF_MSG_TX_DONE)
#define netif_msg_rx_status(p)	((p)->msg_enable & NETIF_MSG_RX_STATUS)
#define netif_msg_pktdata(p)	((p)->msg_enable & NETIF_MSG_PKTDATA)
#define netif_msg_hw(p)		((p)->msg_enable & NETIF_MSG_HW)
#define netif_msg_wol(p)	((p)->msg_enable & NETIF_MSG_WOL)

static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
{
	/* use default */
	if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
		return default_msg_enable_bits;
	if (debug_value == 0)	/* no output */
		return 0;
	/* set low N bits */
	return (1U << debug_value) - 1;
}

static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
{
	spin_lock(&txq->_xmit_lock);
	/* Pairs with READ_ONCE() in __dev_queue_xmit() */
	WRITE_ONCE(txq->xmit_lock_owner, cpu);
}

static inline bool __netif_tx_acquire(struct netdev_queue *txq)
{
	__acquire(&txq->_xmit_lock);
	return true;
}

static inline void __netif_tx_release(struct netdev_queue *txq)
{
	__release(&txq->_xmit_lock);
}

static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	/* Pairs with READ_ONCE() in __dev_queue_xmit() */
	WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());
}

static inline bool __netif_tx_trylock(struct netdev_queue *txq)
{
	bool ok = spin_trylock(&txq->_xmit_lock);

	if (likely(ok)) {
		/* Pairs with READ_ONCE() in __dev_queue_xmit() */
		WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id());
	}
	return ok;
}

static inline void __netif_tx_unlock(struct netdev_queue *txq)
{
	/* Pairs with READ_ONCE() in __dev_queue_xmit() */
	WRITE_ONCE(txq->xmit_lock_owner, -1);
	spin_unlock(&txq->_xmit_lock);
}

static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
{
	/* Pairs with READ_ONCE() in __dev_queue_xmit() */
	WRITE_ONCE(txq->xmit_lock_owner, -1);
	spin_unlock_bh(&txq->_xmit_lock);
}

/*
 * txq->trans_start can be read locklessly from dev_watchdog()
 */
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		WRITE_ONCE(txq->trans_start, jiffies);
}

static inline void txq_trans_cond_update(struct netdev_queue *txq)
{
	unsigned long now = jiffies;

	if (READ_ONCE(txq->trans_start) != now)
		WRITE_ONCE(txq->trans_start, now);
}

/* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
static inline void netif_trans_update(struct net_device *dev)
{
	struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);

	txq_trans_cond_update(txq);
}

/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
void netif_tx_lock(struct net_device *dev);

static inline void netif_tx_lock_bh(struct net_device *dev)
{
	local_bh_disable();
	netif_tx_lock(dev);
}

void netif_tx_unlock(struct net_device *dev);

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
	netif_tx_unlock(dev);
	local_bh_enable();
}

#define HARD_TX_LOCK(dev, txq, cpu) {			\
	if (!(dev)->lltx) {				\
		__netif_tx_lock(txq, cpu);		\
	} else {					\
		__netif_tx_acquire(txq);		\
	}						\
}

#define HARD_TX_TRYLOCK(dev, txq)			\
	(!(dev)->lltx ?					\
		__netif_tx_trylock(txq) :		\
		__netif_tx_acquire(txq))

#define HARD_TX_UNLOCK(dev, txq) {			\
	if (!(dev)->lltx) {				\
		__netif_tx_unlock(txq);			\
	} else {					\
		__netif_tx_release(txq);		\
	}						\
}

static inline void netif_tx_disable(struct net_device *dev)
{
	unsigned int i;
	int cpu;

	local_bh_disable();
	cpu = smp_processor_id();
	spin_lock(&dev->tx_global_lock);
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);

		__netif_tx_lock(txq, cpu);
		netif_tx_stop_queue(txq);
		__netif_tx_unlock(txq);
	}
	spin_unlock(&dev->tx_global_lock);
	local_bh_enable();
}

static inline void netif_addr_lock(struct net_device *dev)
{
	unsigned char nest_level = 0;

#ifdef CONFIG_LOCKDEP
	nest_level = dev->nested_level;
#endif
	spin_lock_nested(&dev->addr_list_lock, nest_level);
}

static inline void netif_addr_lock_bh(struct net_device *dev)
{
	unsigned char nest_level = 0;

#ifdef CONFIG_LOCKDEP
	nest_level = dev->nested_level;
#endif
	local_bh_disable();
	spin_lock_nested(&dev->addr_list_lock, nest_level);
}

static inline void netif_addr_unlock(struct net_device *dev)
{
	spin_unlock(&dev->addr_list_lock);
}

static inline void netif_addr_unlock_bh(struct net_device *dev)
{
	spin_unlock_bh(&dev->addr_list_lock);
}

/*
 * dev_addrs walker. Should be used only for read access. Call with
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)

/* These functions live elsewhere (drivers/net/net_init.c, but related) */

void ether_setup(struct net_device *dev);

/* Allocate dummy net_device */
struct net_device *alloc_netdev_dummy(int sizeof_priv);

/* Support for loadable net-drivers */
struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
				    unsigned char name_assign_type,
				    void (*setup)(struct net_device *),
				    unsigned int txqs, unsigned int rxqs);
#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
	alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)

#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
	alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
			 count)

int register_netdev(struct net_device *dev);
void unregister_netdev(struct net_device *dev);

int devm_register_netdev(struct device *dev, struct net_device *ndev);

/* General hardware address lists handling functions */
int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
		   struct netdev_hw_addr_list *from_list, int addr_len);
int __hw_addr_sync_multiple(struct netdev_hw_addr_list *to_list,
			    struct netdev_hw_addr_list *from_list,
			    int addr_len);
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
		      struct netdev_hw_addr_list *from_list, int addr_len);
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
		       struct net_device *dev,
		       int (*sync)(struct net_device *, const unsigned char *),
		       int (*unsync)(struct net_device *,
				     const unsigned char *));
int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
			   struct net_device *dev,
			   int (*sync)(struct net_device *,
				       const unsigned char *, int),
			   int (*unsync)(struct net_device *,
					 const unsigned char *, int));
void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
			      struct net_device *dev,
			      int (*unsync)(struct net_device *,
					    const unsigned char *, int));
void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
			  struct net_device *dev,
			  int (*unsync)(struct net_device *,
					const unsigned char *));
void __hw_addr_init(struct netdev_hw_addr_list *list);

/* Functions used for device addresses handling */
void dev_addr_mod(struct net_device *dev, unsigned int offset,
		  const void *addr, size_t len);

static inline void
__dev_addr_set(struct net_device *dev, const void *addr, size_t len)
{
	dev_addr_mod(dev, 0, addr, len);
}

static inline void dev_addr_set(struct net_device *dev, const u8 *addr)
{
	__dev_addr_set(dev, addr, dev->addr_len);
}

int dev_addr_add(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);
int dev_addr_del(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);

/* Functions used for unicast addresses handling */
int dev_uc_add(struct net_device *dev, const unsigned char *addr);
int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_uc_del(struct net_device *dev, const unsigned char *addr);
int dev_uc_sync(struct net_device *to, struct net_device *from);
int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_uc_unsync(struct net_device *to, struct net_device *from);
void dev_uc_flush(struct net_device *dev);
void dev_uc_init(struct net_device *dev);

/**
 *  __dev_uc_sync - Synchronize device's unicast list
 *  @dev:  device to sync
 *  @sync: function to call if address should be added
 *  @unsync: function to call if address should be removed
 *
 *  Add newly added addresses to the interface, and release
 *  addresses that have been deleted.
 */
static inline int __dev_uc_sync(struct net_device *dev,
				int (*sync)(struct net_device *,
					    const unsigned char *),
				int (*unsync)(struct net_device *,
					      const unsigned char *))
{
	return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
}

/**
 *  __dev_uc_unsync - Remove synchronized addresses from device
 *  @dev:  device to sync
 *  @unsync: function to call if address should be removed
 *
 *  Remove all addresses that were added to the device by dev_uc_sync().
 */
static inline void __dev_uc_unsync(struct net_device *dev,
				   int (*unsync)(struct net_device *,
						 const unsigned char *))
{
	__hw_addr_unsync_dev(&dev->uc, dev, unsync);
}

/* Functions used for multicast addresses handling */
int dev_mc_add(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_mc_del(struct net_device *dev, const unsigned char *addr);
int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_sync(struct net_device *to, struct net_device *from);
int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_mc_unsync(struct net_device *to, struct net_device *from);
void dev_mc_flush(struct net_device *dev);
void dev_mc_init(struct net_device *dev);

/**
 *  __dev_mc_sync - Synchronize device's multicast list
 *  @dev:  device to sync
 *  @sync: function to call if address should be added
 *  @unsync: function to call if address should be removed
 *
 *  Add newly added addresses to the interface, and release
 *  addresses that have been deleted.
 */
static inline int __dev_mc_sync(struct net_device *dev,
				int (*sync)(struct net_device *,
					    const unsigned char *),
				int (*unsync)(struct net_device *,
					      const unsigned char *))
{
	return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
}

/**
 *  __dev_mc_unsync - Remove synchronized addresses from device
 *  @dev:  device to sync
 *  @unsync: function to call if address should be removed
 *
 *  Remove all addresses that were added to the device by dev_mc_sync().
 */
static inline void __dev_mc_unsync(struct net_device *dev,
				   int (*unsync)(struct net_device *,
						 const unsigned char *))
{
	__hw_addr_unsync_dev(&dev->mc, dev, unsync);
}

/* Functions used for secondary unicast and multicast support */
void dev_set_rx_mode(struct net_device *dev);
int dev_set_promiscuity(struct net_device *dev, int inc);
int dev_set_allmulti(struct net_device *dev, int inc);
void netdev_state_change(struct net_device *dev);
void __netdev_notify_peers(struct net_device *dev);
void netdev_notify_peers(struct net_device *dev);
void netdev_features_change(struct net_device *dev);
/* Load a device via the kmod */
void dev_load(struct net *net, const char *name);
struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					struct rtnl_link_stats64 *storage);
void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
			     const struct net_device_stats *netdev_stats);
void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
			   const struct pcpu_sw_netstats __percpu *netstats);
void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);

enum {
	NESTED_SYNC_IMM_BIT,
	NESTED_SYNC_TODO_BIT,
};

#define __NESTED_SYNC_BIT(bit)	((u32)1 << (bit))
#define __NESTED_SYNC(name)	__NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)

#define NESTED_SYNC_IMM		__NESTED_SYNC(IMM)
#define NESTED_SYNC_TODO	__NESTED_SYNC(TODO)

struct netdev_nested_priv {
	unsigned char flags;
	void *data;
};

bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);

/* iterate through upper list, must be called under RCU read lock */
#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
	for (iter = &(dev)->adj_list.upper, \
	     updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
	     updev; \
	     updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))

int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
				  int (*fn)(struct net_device *upper_dev,
					    struct netdev_nested_priv *priv),
				  struct netdev_nested_priv *priv);

bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
				  struct net_device *upper_dev);

bool netdev_has_any_upper_dev(struct net_device *dev);

void *netdev_lower_get_next_private(struct net_device *dev,
				    struct list_head **iter);
void *netdev_lower_get_next_private_rcu(struct net_device *dev,
					struct list_head **iter);

#define netdev_for_each_lower_private(dev, priv, iter) \
	for (iter = (dev)->adj_list.lower.next, \
	     priv = netdev_lower_get_next_private(dev, &(iter)); \
	     priv; \
	     priv = netdev_lower_get_next_private(dev, &(iter)))

#define netdev_for_each_lower_private_rcu(dev, priv, iter) \
	for (iter = &(dev)->adj_list.lower, \
	     priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
	     priv; \
	     priv = netdev_lower_get_next_private_rcu(dev, &(iter)))

void *netdev_lower_get_next(struct net_device *dev,
				struct list_head **iter);

#define netdev_for_each_lower_dev(dev, ldev, iter) \
	for (iter = (dev)->adj_list.lower.next, \
	     ldev = netdev_lower_get_next(dev, &(iter)); \
	     ldev; \
	     ldev = netdev_lower_get_next(dev, &(iter)))

struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
					     struct list_head **iter);
int netdev_walk_all_lower_dev(struct net_device *dev,
			      int (*fn)(struct net_device *lower_dev,
					struct netdev_nested_priv *priv),
			      struct netdev_nested_priv *priv);
int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
				  int (*fn)(struct net_device *lower_dev,
					    struct netdev_nested_priv *priv),
				  struct netdev_nested_priv *priv);

void *netdev_adjacent_get_private(struct list_head *adj_list);
void *netdev_lower_get_first_private_rcu(struct net_device *dev);
struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
			  struct netlink_ext_ack *extack);
int netdev_master_upper_dev_link(struct net_device *dev,
				 struct net_device *upper_dev,
				 void *upper_priv, void *upper_info,
				 struct netlink_ext_ack *extack);
void netdev_upper_dev_unlink(struct net_device *dev,
			     struct net_device *upper_dev);
int netdev_adjacent_change_prepare(struct net_device *old_dev,
				   struct net_device *new_dev,
				   struct net_device *dev,
				   struct netlink_ext_ack *extack);
void netdev_adjacent_change_commit(struct net_device *old_dev,
				   struct net_device *new_dev,
				   struct net_device *dev);
void netdev_adjacent_change_abort(struct net_device *old_dev,
				  struct net_device *new_dev,
				  struct net_device *dev);
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
void *netdev_lower_dev_get_private(struct net_device *dev,
				   struct net_device *lower_dev);
void netdev_lower_state_changed(struct net_device *lower_dev,
				void *lower_state_info);

/* RSS keys are 40 or 52 bytes long */
#define NETDEV_RSS_KEY_LEN 52
extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
void netdev_rss_key_fill(void *buffer, size_t len);

int skb_checksum_help(struct sk_buff *skb);
int skb_crc32c_csum_help(struct sk_buff *skb);
int skb_csum_hwoffload_help(struct sk_buff *skb,
			    const netdev_features_t features);

struct netdev_bonding_info {
	ifslave	slave;
	ifbond	master;
};

struct netdev_notifier_bonding_info {
	struct netdev_notifier_info info; /* must be first */
	struct netdev_bonding_info  bonding_info;
};

void netdev_bonding_info_change(struct net_device *dev,
				struct netdev_bonding_info *bonding_info);

#if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
#else
static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
				  const void *data)
{
}
#endif

__be16 skb_network_protocol(struct sk_buff *skb, int *depth);

static inline bool can_checksum_protocol(netdev_features_t features,
					 __be16 protocol)
{
	if (protocol == htons(ETH_P_FCOE))
		return !!(features & NETIF_F_FCOE_CRC);

	/* Assume this is an IP checksum (not SCTP CRC) */

	if (features & NETIF_F_HW_CSUM) {
		/* Can checksum everything */
		return true;
	}

	switch (protocol) {
	case htons(ETH_P_IP):
		return !!(features & NETIF_F_IP_CSUM);
	case htons(ETH_P_IPV6):
		return !!(features & NETIF_F_IPV6_CSUM);
	default:
		return false;
	}
}

#ifdef CONFIG_BUG
void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
#else
static inline void netdev_rx_csum_fault(struct net_device *dev,
					struct sk_buff *skb)
{
}
#endif
/* rx skb timestamps */
void net_enable_timestamp(void);
void net_disable_timestamp(void);

static inline ktime_t netdev_get_tstamp(struct net_device *dev,
					const struct skb_shared_hwtstamps *hwtstamps,
					bool cycles)
{
	const struct net_device_ops *ops = dev->netdev_ops;

	if (ops->ndo_get_tstamp)
		return ops->ndo_get_tstamp(dev, hwtstamps, cycles);

	return hwtstamps->hwtstamp;
}

#ifndef CONFIG_PREEMPT_RT
static inline void netdev_xmit_set_more(bool more)
{
	__this_cpu_write(softnet_data.xmit.more, more);
}

static inline bool netdev_xmit_more(void)
{
	return __this_cpu_read(softnet_data.xmit.more);
}
#else
static inline void netdev_xmit_set_more(bool more)
{
	current->net_xmit.more = more;
}

static inline bool netdev_xmit_more(void)
{
	return current->net_xmit.more;
}
#endif

static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
					      struct sk_buff *skb, struct net_device *dev,
					      bool more)
{
	netdev_xmit_set_more(more);
	return ops->ndo_start_xmit(skb, dev);
}

static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
					    struct netdev_queue *txq, bool more)
{
	const struct net_device_ops *ops = dev->netdev_ops;
	netdev_tx_t rc;

	rc = __netdev_start_xmit(ops, skb, dev, more);
	if (rc == NETDEV_TX_OK)
		txq_trans_update(txq);

	return rc;
}

int netdev_class_create_file_ns(const struct class_attribute *class_attr,
				const void *ns);
void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
				 const void *ns);

extern const struct kobj_ns_type_operations net_ns_type_operations;

const char *netdev_drivername(const struct net_device *dev);

static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
							  netdev_features_t f2)
{
	if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
		if (f1 & NETIF_F_HW_CSUM)
			f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
		else
			f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
	}

	return f1 & f2;
}

static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);

/* Allow TSO being used on stacked device :
 * Performing the GSO segmentation before last device
 * is a performance improvement.
 */
static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
							netdev_features_t mask)
{
	return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
}

int __netdev_update_features(struct net_device *dev);
void netdev_update_features(struct net_device *dev);
void netdev_change_features(struct net_device *dev);

void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

netdev_features_t passthru_features_check(struct sk_buff *skb,
					  struct net_device *dev,
					  netdev_features_t features);
netdev_features_t netif_skb_features(struct sk_buff *skb);
void skb_warn_bad_offload(const struct sk_buff *skb);

static inline bool net_gso_ok(netdev_features_t features, int gso_type)
{
	netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;

	/* check flags correspondence */
	BUILD_BUG_ON(SKB_GSO_TCPV4   != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_DODGY   != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TCPV6   != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_FCOE    != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_GRE     != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_IPXIP4  != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_IPXIP6  != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_SCTP    != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));

	return (features & feature) == feature;
}

static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
{
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
}

static inline bool netif_needs_gso(struct sk_buff *skb,
				   netdev_features_t features)
{
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
		unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
			 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
}

void netif_set_tso_max_size(struct net_device *dev, unsigned int size);
void netif_set_tso_max_segs(struct net_device *dev, unsigned int segs);
void netif_inherit_tso_max(struct net_device *to,
			   const struct net_device *from);

static inline unsigned int
netif_get_gro_max_size(const struct net_device *dev, const struct sk_buff *skb)
{
	/* pairs with WRITE_ONCE() in netif_set_gro(_ipv4)_max_size() */
	return skb->protocol == htons(ETH_P_IPV6) ?
	       READ_ONCE(dev->gro_max_size) :
	       READ_ONCE(dev->gro_ipv4_max_size);
}

static inline unsigned int
netif_get_gso_max_size(const struct net_device *dev, const struct sk_buff *skb)
{
	/* pairs with WRITE_ONCE() in netif_set_gso(_ipv4)_max_size() */
	return skb->protocol == htons(ETH_P_IPV6) ?
	       READ_ONCE(dev->gso_max_size) :
	       READ_ONCE(dev->gso_ipv4_max_size);
}

static inline bool netif_is_macsec(const struct net_device *dev)
{
	return dev->priv_flags & IFF_MACSEC;
}

static inline bool netif_is_macvlan(const struct net_device *dev)
{
	return dev->priv_flags & IFF_MACVLAN;
}

static inline bool netif_is_macvlan_port(const struct net_device *dev)
{
	return dev->priv_flags & IFF_MACVLAN_PORT;
}

static inline bool netif_is_bond_master(const struct net_device *dev)
{
	return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
}

static inline bool netif_is_bond_slave(const struct net_device *dev)
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

static inline bool netif_supports_nofcs(struct net_device *dev)
{
	return dev->priv_flags & IFF_SUPP_NOFCS;
}

static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
{
	return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
}

static inline bool netif_is_l3_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_L3MDEV_MASTER;
}

static inline bool netif_is_l3_slave(const struct net_device *dev)
{
	return dev->priv_flags & IFF_L3MDEV_SLAVE;
}

static inline int dev_sdif(const struct net_device *dev)
{
#ifdef CONFIG_NET_L3_MASTER_DEV
	if (netif_is_l3_slave(dev))
		return dev->ifindex;
#endif
	return 0;
}

static inline bool netif_is_bridge_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_EBRIDGE;
}

static inline bool netif_is_bridge_port(const struct net_device *dev)
{
	return dev->priv_flags & IFF_BRIDGE_PORT;
}

static inline bool netif_is_ovs_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_OPENVSWITCH;
}

static inline bool netif_is_ovs_port(const struct net_device *dev)
{
	return dev->priv_flags & IFF_OVS_DATAPATH;
}

static inline bool netif_is_any_bridge_master(const struct net_device *dev)
{
	return netif_is_bridge_master(dev) || netif_is_ovs_master(dev);
}

static inline bool netif_is_any_bridge_port(const struct net_device *dev)
{
	return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);
}

static inline bool netif_is_team_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_TEAM;
}

static inline bool netif_is_team_port(const struct net_device *dev)
{
	return dev->priv_flags & IFF_TEAM_PORT;
}

static inline bool netif_is_lag_master(const struct net_device *dev)
{
	return netif_is_bond_master(dev) || netif_is_team_master(dev);
}

static inline bool netif_is_lag_port(const struct net_device *dev)
{
	return netif_is_bond_slave(dev) || netif_is_team_port(dev);
}

static inline bool netif_is_rxfh_configured(const struct net_device *dev)
{
	return dev->priv_flags & IFF_RXFH_CONFIGURED;
}

static inline bool netif_is_failover(const struct net_device *dev)
{
	return dev->priv_flags & IFF_FAILOVER;
}

static inline bool netif_is_failover_slave(const struct net_device *dev)
{
	return dev->priv_flags & IFF_FAILOVER_SLAVE;
}

/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
static inline void netif_keep_dst(struct net_device *dev)
{
	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
}

/* return true if dev can't cope with mtu frames that need vlan tag insertion */
static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
{
	/* TODO: reserve and use an additional IFF bit, if we get more users */
	return netif_is_macsec(dev);
}

extern struct pernet_operations __net_initdata loopback_net_ops;

/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* netdev_printk helpers, similar to dev_printk */

static inline const char *netdev_name(const struct net_device *dev)
{
	if (!dev->name[0] || strchr(dev->name, '%'))
		return "(unnamed net_device)";
	return dev->name;
}

static inline const char *netdev_reg_state(const struct net_device *dev)
{
	u8 reg_state = READ_ONCE(dev->reg_state);

	switch (reg_state) {
	case NETREG_UNINITIALIZED: return " (uninitialized)";
	case NETREG_REGISTERED: return "";
	case NETREG_UNREGISTERING: return " (unregistering)";
	case NETREG_UNREGISTERED: return " (unregistered)";
	case NETREG_RELEASED: return " (released)";
	case NETREG_DUMMY: return " (dummy)";
	}

	WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, reg_state);
	return " (unknown)";
}

#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

/*
 * netdev_WARN() acts like dev_printk(), but with the key difference
 * of using a WARN/WARN_ON to get the message out, including the
 * file/line information and a backtrace.
 */
#define netdev_WARN(dev, format, args...)			\
	WARN(1, "netdevice: %s%s: " format, netdev_name(dev),	\
	     netdev_reg_state(dev), ##args)

#define netdev_WARN_ONCE(dev, format, args...)				\
	WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev),	\
		  netdev_reg_state(dev), ##args)

/*
 *	The list of packet types we will receive (as opposed to discard)
 *	and the routines to invoke.
 *
 *	Why 16. Because with 16 the only overlap we get on a hash of the
 *	low nibble of the protocol value is RARP/SNAP/X.25.
 *
 *		0800	IP
 *		0001	802.3
 *		0002	AX.25
 *		0004	802.2
 *		8035	RARP
 *		0005	SNAP
 *		0805	X.25
 *		0806	ARP
 *		8137	IPX
 *		0009	Localtalk
 *		86DD	IPv6
 */
#define PTYPE_HASH_SIZE	(16)
#define PTYPE_HASH_MASK	(PTYPE_HASH_SIZE - 1)

extern struct list_head ptype_base[PTYPE_HASH_SIZE] __read_mostly;

extern struct net_device *blackhole_netdev;

/* Note: Avoid these macros in fast path, prefer per-cpu or per-queue counters. */
#define DEV_STATS_INC(DEV, FIELD) atomic_long_inc(&(DEV)->stats.__##FIELD)
#define DEV_STATS_ADD(DEV, FIELD, VAL) 	\
		atomic_long_add((VAL), &(DEV)->stats.__##FIELD)
#define DEV_STATS_READ(DEV, FIELD) atomic_long_read(&(DEV)->stats.__##FIELD)

#endif	/* _LINUX_NETDEVICE_H */

Filemanager

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amba Folder 0755
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avf Folder 0755
bcma Folder 0755
bus Folder 0755
byteorder Folder 0755
can Folder 0755
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ceph Folder 0755
clk Folder 0755
comedi Folder 0755
crush Folder 0755
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io_uring Folder 0755
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lockd Folder 0755
lsm Folder 0755
mailbox Folder 0755
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mmc Folder 0755
mtd Folder 0755
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net Folder 0755
netfilter Folder 0755
netfilter_arp Folder 0755
netfilter_bridge Folder 0755
netfilter_ipv4 Folder 0755
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pcs Folder 0755
pds Folder 0755
perf Folder 0755
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raid Folder 0755
regulator Folder 0755
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reset Folder 0755
rpmsg Folder 0755
rtc Folder 0755
sched Folder 0755
soc Folder 0755
soundwire Folder 0755
spi Folder 0755
ssb Folder 0755
sunrpc Folder 0755
surface_aggregator Folder 0755
ulpi Folder 0755
unaligned Folder 0755
usb Folder 0755
8250_pci.h File 1.01 KB 0644
acct.h File 2.45 KB 0644
acpi.h File 44.88 KB 0644
acpi_amd_wbrf.h File 2.24 KB 0644
acpi_dma.h File 2.95 KB 0644
acpi_iort.h File 2.64 KB 0644
acpi_mdio.h File 819 B 0644
acpi_pmtmr.h File 1.02 KB 0644
acpi_viot.h File 478 B 0644
adb.h File 1.79 KB 0644
adfs_fs.h File 574 B 0644
adreno-smmu-priv.h File 3.15 KB 0644
adxl.h File 310 B 0644
aer.h File 1.49 KB 0644
agp_backend.h File 3.45 KB 0644
agpgart.h File 3.79 KB 0644
ahci-remap.h File 607 B 0644
ahci_platform.h File 1.81 KB 0644
aio.h File 570 B 0644
alarmtimer.h File 1.83 KB 0644
alcor_pci.h File 8.74 KB 0644
align.h File 552 B 0644
alloc_tag.h File 6.4 KB 0644
altera_jtaguart.h File 379 B 0644
altera_uart.h File 397 B 0644
amd-iommu.h File 2.12 KB 0644
amd-pmf-io.h File 1.58 KB 0644
anon_inodes.h File 1021 B 0644
aperture.h File 1.61 KB 0644
apm-emulation.h File 1.56 KB 0644
apm_bios.h File 2.25 KB 0644
apple-gmux.h File 4.63 KB 0644
arch_topology.h File 2.93 KB 0644
args.h File 1021 B 0644
arm-cci.h File 1.39 KB 0644
arm-smccc.h File 20.7 KB 0644
arm_ffa.h File 14.71 KB 0644
arm_sdei.h File 2.67 KB 0644
armada-37xx-rwtm-mailbox.h File 431 B 0644
array_size.h File 332 B 0644
ascii85.h File 555 B 0644
asn1.h File 1.79 KB 0644
asn1_ber_bytecode.h File 2.52 KB 0644
asn1_decoder.h File 493 B 0644
asn1_encoder.h File 983 B 0644
assoc_array.h File 2.88 KB 0644
assoc_array_priv.h File 5.3 KB 0644
async.h File 4.36 KB 0644
async_tx.h File 6.7 KB 0644
ata.h File 30.39 KB 0644
ata_platform.h File 755 B 0644
atalk.h File 4.45 KB 0644
atm.h File 287 B 0644
atm_tcp.h File 542 B 0644
atmdev.h File 10.17 KB 0644
atmel-isc-media.h File 2.07 KB 0644
atmel-ssc.h File 9.74 KB 0644
atmel_pdc.h File 1.26 KB 0644
atomic.h File 2.58 KB 0644
attribute_container.h File 2.47 KB 0644
audit.h File 20.48 KB 0644
audit_arch.h File 559 B 0644
auto_dev-ioctl.h File 296 B 0644
auto_fs.h File 278 B 0644
auxiliary_bus.h File 10.33 KB 0644
auxvec.h File 304 B 0644
average.h File 2.42 KB 0644
backing-dev-defs.h File 8.4 KB 0644
backing-dev.h File 10.41 KB 0644
backing-file.h File 1.51 KB 0644
backlight.h File 11.9 KB 0644
badblocks.h File 2.66 KB 0644
balloon_compaction.h File 6 KB 0644
base64.h File 370 B 0644
bcd.h File 683 B 0644
bch.h File 2.1 KB 0644
bcm47xx_nvram.h File 1.2 KB 0644
bcm47xx_sprom.h File 616 B 0644
bcm47xx_wdt.h File 555 B 0644
bcm963xx_nvram.h File 2.96 KB 0644
bcm963xx_tag.h File 3.6 KB 0644
binfmts.h File 4.63 KB 0644
bio-integrity.h File 4.16 KB 0644
bio.h File 18.01 KB 0644
bit_spinlock.h File 2.3 KB 0644
bitfield.h File 6.39 KB 0644
bitmap-str.h File 842 B 0644
bitmap.h File 29.11 KB 0644
bitops.h File 10.14 KB 0644
bitrev.h File 2.53 KB 0644
bits.h File 1.57 KB 0644
blk-cgroup.h File 1.53 KB 0644
blk-crypto-profile.h File 5.3 KB 0644
blk-crypto.h File 4.13 KB 0644
blk-integrity.h File 3.99 KB 0644
blk-mq.h File 33.72 KB 0644
blk-pm.h File 647 B 0644
blk_types.h File 15.31 KB 0644
blkdev.h File 49.82 KB 0644
blkpg.h File 436 B 0644
blktrace_api.h File 3.55 KB 0644
blockgroup_lock.h File 810 B 0644
bma150.h File 1.25 KB 0644
bootconfig.h File 9.27 KB 0644
bootmem_info.h File 2.04 KB 0644
bottom_half.h File 1013 B 0644
bpf-cgroup-defs.h File 2.07 KB 0644
bpf-cgroup.h File 18.4 KB 0644
bpf-netns.h File 1.41 KB 0644
bpf.h File 110.52 KB 0644
bpf_crypto.h File 865 B 0644
bpf_lirc.h File 698 B 0644
bpf_local_storage.h File 6.61 KB 0644
bpf_lsm.h File 2.01 KB 0644
bpf_mem_alloc.h File 2.05 KB 0644
bpf_mprog.h File 9.29 KB 0644
bpf_trace.h File 166 B 0644
bpf_types.h File 6.1 KB 0644
bpf_verifier.h File 33.06 KB 0644
bpfptr.h File 2.09 KB 0644
brcmphy.h File 21.77 KB 0644
bsearch.h File 624 B 0644
bsg-lib.h File 1.71 KB 0644
bsg.h File 499 B 0644
btf.h File 20.05 KB 0644
btf_ids.h File 8.18 KB 0644
btree-128.h File 2.67 KB 0644
btree-type.h File 3.9 KB 0644
btree.h File 6.84 KB 0644
btrfs.h File 145 B 0644
buffer_head.h File 17.37 KB 0644
bug.h File 2.33 KB 0644
build-salt.h File 375 B 0644
build_bug.h File 2.99 KB 0644
buildid.h File 671 B 0644
bvec.h File 7.54 KB 0644
c2port.h File 1.35 KB 0644
cache.h File 5.51 KB 0644
cacheflush.h File 675 B 0644
cacheinfo.h File 4.92 KB 0644
call_once.h File 1.67 KB 0644
capability.h File 6.27 KB 0644
cb710.h File 5.36 KB 0644
cc_platform.h File 3.42 KB 0644
cciss_ioctl.h File 1.03 KB 0644
ccp.h File 18.14 KB 0644
cdev.h File 845 B 0644
cdrom.h File 8.92 KB 0644
cfag12864b.h File 1.07 KB 0644
cfi.h File 1.23 KB 0644
cfi_types.h File 1.06 KB 0644
cgroup-defs.h File 26.77 KB 0644
cgroup.h File 26.33 KB 0644
cgroup_api.h File 26 B 0644
cgroup_dmem.h File 1.91 KB 0644
cgroup_rdma.h File 1.18 KB 0644
cgroup_refcnt.h File 2.59 KB 0644
cgroup_subsys.h File 1.28 KB 0644
circ_buf.h File 1.09 KB 0644
cleanup.h File 13.45 KB 0644
clk-provider.h File 65.77 KB 0644
clk.h File 36.18 KB 0644
clkdev.h File 1.2 KB 0644
clockchips.h File 7.29 KB 0644
clocksource.h File 11.01 KB 0644
clocksource_ids.h File 333 B 0644
closure.h File 14.22 KB 0644
cma.h File 2.26 KB 0644
cmpxchg-emu.h File 435 B 0644
cn_proc.h File 1.85 KB 0644
cnt32_to_63.h File 3.46 KB 0644
coda.h File 2.16 KB 0644
codetag.h File 3.4 KB 0644
compaction.h File 4.5 KB 0644
compat.h File 32.32 KB 0644
compiler-clang.h File 4.13 KB 0644
compiler-gcc.h File 3.92 KB 0644
compiler-version.h File 517 B 0644
compiler.h File 12.26 KB 0644
compiler_attributes.h File 15.91 KB 0644
compiler_types.h File 18.79 KB 0644
completion.h File 4.14 KB 0644
component.h File 4.35 KB 0644
configfs.h File 8.54 KB 0644
connector.h File 4.01 KB 0644
console.h File 24.18 KB 0644
console_struct.h File 6.98 KB 0644
consolemap.h File 1.25 KB 0644
const.h File 100 B 0644
container.h File 616 B 0644
container_of.h File 1.3 KB 0644
context_tracking.h File 4.4 KB 0644
context_tracking_irq.h File 633 B 0644
context_tracking_state.h File 3.8 KB 0644
cookie.h File 1.22 KB 0644
cordic.h File 2.08 KB 0644
coredump.h File 2.17 KB 0644
coresight-pmu.h File 2.32 KB 0644
coresight-stm.h File 152 B 0644
coresight.h File 22.68 KB 0644
count_zeros.h File 1.42 KB 0644
counter.h File 21.48 KB 0644
cper.h File 17.59 KB 0644
cpu.h File 6.67 KB 0644
cpu_cooling.h File 1.83 KB 0644
cpu_pm.h File 2.38 KB 0644
cpu_rmap.h File 1.7 KB 0644
cpu_smt.h File 1.12 KB 0644
cpufeature.h File 1.71 KB 0644
cpufreq.h File 36.37 KB 0644
cpuhotplug.h File 16.95 KB 0644
cpuhplock.h File 1.52 KB 0644
cpuidle.h File 11.42 KB 0644
cpuidle_haltpoll.h File 312 B 0644
cpumask.h File 37.26 KB 0644
cpumask_api.h File 27 B 0644
cpumask_types.h File 2.18 KB 0644
cpuset.h File 8.01 KB 0644
crash_core.h File 2.65 KB 0644
crash_dump.h File 6.29 KB 0644
crash_reserve.h File 1.33 KB 0644
crc-ccitt.h File 369 B 0644
crc-itu-t.h File 530 B 0644
crc-t10dif.h File 759 B 0644
crc16.h File 540 B 0644
crc32.h File 4.23 KB 0644
crc32c.h File 346 B 0644
crc32poly.h File 610 B 0644
crc4.h File 192 B 0644
crc64.h File 539 B 0644
crc7.h File 316 B 0644
crc8.h File 3.66 KB 0644
cred.h File 11.95 KB 0644
crypto.h File 19.01 KB 0644
cs5535.h File 6.13 KB 0644
ctype.h File 1.87 KB 0644
cuda.h File 620 B 0644
damon.h File 33.47 KB 0644
dasd_mod.h File 204 B 0644
davinci_emac.h File 1.05 KB 0644
dax.h File 8.75 KB 0644
dca.h File 1.88 KB 0644
dcache.h File 18.81 KB 0644
dccp.h File 10.74 KB 0644
debug_locks.h File 1.57 KB 0644
debugfs.h File 15.87 KB 0644
debugobjects.h File 4.09 KB 0644
delay.h File 4.18 KB 0644
delayacct.h File 7.08 KB 0644
delayed_call.h File 709 B 0644
dev_printk.h File 9.74 KB 0644
devcoredump.h File 3.53 KB 0644
devfreq-event.h File 5.95 KB 0644
devfreq.h File 14.52 KB 0644
devfreq_cooling.h File 2.7 KB 0644
device-mapper.h File 21.11 KB 0644
device.h File 43.19 KB 0644
device_cgroup.h File 1.57 KB 0644
devm-helpers.h File 2.67 KB 0644
devpts_fs.h File 1.13 KB 0644
dfl.h File 2.72 KB 0644
digsig.h File 1.18 KB 0644
dim.h File 12.69 KB 0644
dio.h File 10.77 KB 0644
dirent.h File 215 B 0644
dlm.h File 6.44 KB 0644
dlm_plock.h File 642 B 0644
dm-bufio.h File 5.16 KB 0644
dm-dirty-log.h File 4 KB 0644
dm-io.h File 2.03 KB 0644
dm-kcopyd.h File 3.03 KB 0644
dm-region-hash.h File 3.16 KB 0644
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wireless.h File 1.56 KB 0644
wkup_m3_ipc.h File 1.58 KB 0644
wm97xx.h File 10.44 KB 0644
wmi.h File 3.36 KB 0644
wordpart.h File 1.5 KB 0644
workqueue.h File 29.84 KB 0644
workqueue_api.h File 29 B 0644
workqueue_types.h File 564 B 0644
writeback.h File 12.67 KB 0644
ww_mutex.h File 13.38 KB 0644
wwan.h File 6 KB 0644
xarray.h File 58.06 KB 0644
xattr.h File 4.5 KB 0644
xxhash.h File 8.27 KB 0644
xz.h File 15.66 KB 0644
yam.h File 2.18 KB 0644
zconf.h File 1.73 KB 0644
zlib.h File 28.11 KB 0644
zorro.h File 3.57 KB 0644
zpool.h File 2.84 KB 0644
zsmalloc.h File 1.71 KB 0644
zstd.h File 22.47 KB 0644
zstd_errors.h File 3.09 KB 0644
zstd_lib.h File 144.05 KB 0644
zswap.h File 1.82 KB 0644
zutil.h File 2.73 KB 0644
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