netdevice.h 91.8 KB
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/*
 * 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
 *
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 * Authors:	Ross Biro
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 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *		Corey Minyard <wf-rch!minyard@relay.EU.net>
 *		Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
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 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
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 *		Bjorn Ekwall. <bj0rn@blox.se>
 *              Pekka Riikonen <priikone@poseidon.pspt.fi>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 *		Moved to /usr/include/linux for NET3
 */
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H

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

#include <linux/percpu.h>
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#include <linux/rculist.h>
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#include <linux/dmaengine.h>
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#include <linux/workqueue.h>
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#include <linux/dynamic_queue_limits.h>
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#include <linux/ethtool.h>
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#include <net/net_namespace.h>
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#include <net/dsa.h>
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#ifdef CONFIG_DCB
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#include <net/dcbnl.h>
#endif
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#include <net/netprio_cgroup.h>
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#include <linux/netdev_features.h>
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#include <linux/neighbour.h>
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#include <uapi/linux/netdevice.h>
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struct netpoll_info;
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struct device;
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struct phy_device;
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/* 802.11 specific */
struct wireless_dev;
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					/* source back-compat hooks */
#define SET_ETHTOOL_OPS(netdev,ops) \
	( (netdev)->ethtool_ops = (ops) )

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

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/* hardware address assignment types */
#define NET_ADDR_PERM		0	/* address is permanent (default) */
#define NET_ADDR_RANDOM		1	/* address is generated randomly */
#define NET_ADDR_STOLEN		2	/* address is stolen from other device */
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#define NET_ADDR_SET		3	/* address is set using
					 * dev_set_mac_address() */
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/* Backlog congestion levels */
#define NET_RX_SUCCESS		0	/* keep 'em coming, baby */
#define NET_RX_DROP		1	/* packet dropped */

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/*
 * 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(), all
 * others are propagated to higher layers.
 */

/* qdisc ->enqueue() return codes. */
#define NET_XMIT_SUCCESS	0x00
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#define NET_XMIT_DROP		0x01	/* skb dropped			*/
#define NET_XMIT_CN		0x02	/* congestion notification	*/
#define NET_XMIT_POLICED	0x03	/* skb is shot by police	*/
#define NET_XMIT_MASK		0x0f	/* qdisc flags in net/sch_generic.h */
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/* 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. */
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#define net_xmit_eval(e)	((e) == NET_XMIT_CN ? 0 : (e))
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#define net_xmit_errno(e)	((e) != NET_XMIT_CN ? -ENOBUFS : 0)

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/* Driver transmit return codes */
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#define NETDEV_TX_MASK		0xf0
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enum netdev_tx {
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	__NETDEV_TX_MIN	 = INT_MIN,	/* make sure enum is signed */
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	NETDEV_TX_OK	 = 0x00,	/* driver took care of packet */
	NETDEV_TX_BUSY	 = 0x10,	/* driver tx path was busy*/
	NETDEV_TX_LOCKED = 0x20,	/* driver tx lock was already taken */
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};
typedef enum netdev_tx netdev_tx_t;

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/*
 * 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;
}

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/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
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#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
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# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
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#else
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# define LL_MAX_HEADER 32
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#endif

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

/*
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 *	Old network device statistics. Fields are native words
 *	(unsigned long) so they can be read and written atomically.
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 */
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struct net_device_stats {
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	unsigned long	rx_packets;
	unsigned long	tx_packets;
	unsigned long	rx_bytes;
	unsigned long	tx_bytes;
	unsigned long	rx_errors;
	unsigned long	tx_errors;
	unsigned long	rx_dropped;
	unsigned long	tx_dropped;
	unsigned long	multicast;
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	unsigned long	collisions;
	unsigned long	rx_length_errors;
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	unsigned long	rx_over_errors;
	unsigned long	rx_crc_errors;
	unsigned long	rx_frame_errors;
	unsigned long	rx_fifo_errors;
	unsigned long	rx_missed_errors;
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	unsigned long	tx_aborted_errors;
	unsigned long	tx_carrier_errors;
	unsigned long	tx_fifo_errors;
	unsigned long	tx_heartbeat_errors;
	unsigned long	tx_window_errors;
	unsigned long	rx_compressed;
	unsigned long	tx_compressed;
};


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

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#ifdef CONFIG_RPS
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#include <linux/static_key.h>
extern struct static_key rps_needed;
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#endif

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struct neighbour;
struct neigh_parms;
struct sk_buff;

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struct netdev_hw_addr {
	struct list_head	list;
	unsigned char		addr[MAX_ADDR_LEN];
	unsigned char		type;
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#define NETDEV_HW_ADDR_T_LAN		1
#define NETDEV_HW_ADDR_T_SAN		2
#define NETDEV_HW_ADDR_T_SLAVE		3
#define NETDEV_HW_ADDR_T_UNICAST	4
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#define NETDEV_HW_ADDR_T_MULTICAST	5
	bool			global_use;
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	int			sync_cnt;
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	int			refcount;
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	int			synced;
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	struct rcu_head		rcu_head;
};

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

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#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)
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#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)
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#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
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#define netdev_for_each_mc_addr(ha, dev) \
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	netdev_hw_addr_list_for_each(ha, &(dev)->mc)
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struct hh_cache {
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	u16		hh_len;
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	u16		__pad;
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	seqlock_t	hh_lock;
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	/* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD	16
#define HH_DATA_OFF(__len) \
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	(HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
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#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) \
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	((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
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	((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
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struct header_ops {
	int	(*create) (struct sk_buff *skb, struct net_device *dev,
			   unsigned short type, const void *daddr,
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			   const void *saddr, unsigned int len);
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	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*rebuild)(struct sk_buff *skb);
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	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
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	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
};

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

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


/*
 * This structure holds at boot time configured netdevice settings. They
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 * are then used in the device probing.
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 */
struct netdev_boot_setup {
	char name[IFNAMSIZ];
	struct ifmap map;
};
#define NETDEV_BOOT_SETUP_MAX 8

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extern int __init netdev_boot_setup(char *str);
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/*
 * 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;
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	unsigned int		gro_count;
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	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	spinlock_t		poll_lock;
	int			poll_owner;
#endif
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	struct net_device	*dev;
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	struct sk_buff		*gro_list;
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	struct sk_buff		*skb;
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	struct list_head	dev_list;
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	struct hlist_node	napi_hash_node;
	unsigned int		napi_id;
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};

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enum {
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	NAPI_STATE_SCHED,	/* Poll is scheduled */
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	NAPI_STATE_DISABLE,	/* Disable pending */
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	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
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	NAPI_STATE_HASHED,	/* In NAPI hash */
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};

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enum gro_result {
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	GRO_MERGED,
	GRO_MERGED_FREE,
	GRO_HELD,
	GRO_NORMAL,
	GRO_DROP,
};
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typedef enum gro_result gro_result_t;
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/*
 * 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, passe 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 to 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 ways.
 *
 * 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 consider the skb should be ignored, it should return
 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
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 * are registered on exact device (ptype->dev == skb->dev).
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 *
 * If the rx_handler didn't changed skb->dev, but want 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);
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extern void __napi_schedule(struct napi_struct *n);
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static inline bool napi_disable_pending(struct napi_struct *n)
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{
	return test_bit(NAPI_STATE_DISABLE, &n->state);
}

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/**
 *	napi_schedule_prep - check if napi can be scheduled
 *	@n: napi context
 *
 * Test if NAPI routine is already running, and if not mark
 * it as running.  This is used as a condition variable
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 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
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 */
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static inline bool napi_schedule_prep(struct napi_struct *n)
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{
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	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
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}

/**
 *	napi_schedule - schedule NAPI poll
 *	@n: napi context
 *
 * Schedule NAPI poll routine to be called if it is not already
 * running.
 */
static inline void napi_schedule(struct napi_struct *n)
{
	if (napi_schedule_prep(n))
		__napi_schedule(n);
}

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/* Try to reschedule poll. Called by dev->poll() after napi_complete().  */
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static inline bool napi_reschedule(struct napi_struct *napi)
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{
	if (napi_schedule_prep(napi)) {
		__napi_schedule(napi);
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		return true;
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	}
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	return false;
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}

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/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
 */
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extern void __napi_complete(struct napi_struct *n);
extern void napi_complete(struct napi_struct *n);
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/**
 *	napi_by_id - lookup a NAPI by napi_id
 *	@napi_id: hashed napi_id
 *
 * lookup @napi_id in napi_hash table
 * must be called under rcu_read_lock()
 */
extern struct napi_struct *napi_by_id(unsigned int napi_id);

/**
 *	napi_hash_add - add a NAPI to global hashtable
 *	@napi: napi context
 *
 * generate a new napi_id and store a @napi under it in napi_hash
 */
extern void napi_hash_add(struct napi_struct *napi);

/**
 *	napi_hash_del - remove a NAPI from global table
 *	@napi: napi context
 *
 * Warning: caller must observe rcu grace period
 * before freeing memory containing @napi
 */
extern void napi_hash_del(struct napi_struct *napi);

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/**
 *	napi_disable - prevent NAPI from scheduling
 *	@n: napi context
 *
 * Stop NAPI from being scheduled on this context.
 * Waits till any outstanding processing completes.
 */
static inline void napi_disable(struct napi_struct *n)
{
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	set_bit(NAPI_STATE_DISABLE, &n->state);
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	while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
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		msleep(1);
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	clear_bit(NAPI_STATE_DISABLE, &n->state);
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}

/**
 *	napi_enable - enable NAPI scheduling
 *	@n: napi context
 *
 * Resume NAPI from being scheduled on this context.
 * Must be paired with napi_disable.
 */
static inline void napi_enable(struct napi_struct *n)
{
	BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
	smp_mb__before_clear_bit();
	clear_bit(NAPI_STATE_SCHED, &n->state);
}

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#ifdef CONFIG_SMP
/**
 *	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)
{
	while (test_bit(NAPI_STATE_SCHED, &n->state))
		msleep(1);
}
#else
# define napi_synchronize(n)	barrier()
#endif

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enum netdev_queue_state_t {
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	__QUEUE_STATE_DRV_XOFF,
	__QUEUE_STATE_STACK_XOFF,
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	__QUEUE_STATE_FROZEN,
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#define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF)		| \
			      (1 << __QUEUE_STATE_STACK_XOFF))
#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF		| \
					(1 << __QUEUE_STATE_FROZEN))
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};
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/*
 * __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_*.
 */
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struct netdev_queue {
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/*
 * read mostly part
 */
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	struct net_device	*dev;
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	struct Qdisc		*qdisc;
	struct Qdisc		*qdisc_sleeping;
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#ifdef CONFIG_SYSFS
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	struct kobject		kobj;
#endif
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#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	int			numa_node;
#endif
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/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
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	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
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	/*
	 * Number of TX timeouts for this queue
	 * (/sys/class/net/DEV/Q/trans_timeout)
	 */
	unsigned long		trans_timeout;
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	unsigned long		state;

#ifdef CONFIG_BQL
	struct dql		dql;
#endif
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} ____cacheline_aligned_in_smp;
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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
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	return NUMA_NO_NODE;
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#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
}

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#ifdef CONFIG_RPS
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/*
 * This structure holds an RPS map which can be of variable length.  The
 * map is an array of CPUs.
 */
struct rps_map {
	unsigned int len;
	struct rcu_head rcu;
	u16 cpus[0];
};
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#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
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/*
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 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
 * tail pointer for that CPU's input queue at the time of last enqueue, and
 * a hardware filter index.
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 */
struct rps_dev_flow {
	u16 cpu;
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	u16 filter;
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	unsigned int last_qtail;
};
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#define RPS_NO_FILTER 0xffff
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/*
 * The rps_dev_flow_table structure contains a table of flow mappings.
 */
struct rps_dev_flow_table {
	unsigned int mask;
	struct rcu_head rcu;
	struct rps_dev_flow flows[0];
};
#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
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    ((_num) * sizeof(struct rps_dev_flow)))
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/*
 * The rps_sock_flow_table contains mappings of flows to the last CPU
 * on which they were processed by the application (set in recvmsg).
 */
struct rps_sock_flow_table {
	unsigned int mask;
	u16 ents[0];
};
#define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
639
    ((_num) * sizeof(u16)))
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#define RPS_NO_CPU 0xffff

static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
					u32 hash)
{
	if (table && hash) {
		unsigned int cpu, index = hash & table->mask;

		/* We only give a hint, preemption can change cpu under us */
		cpu = raw_smp_processor_id();

		if (table->ents[index] != cpu)
			table->ents[index] = cpu;
	}
}

static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
				       u32 hash)
{
	if (table && hash)
		table->ents[hash & table->mask] = RPS_NO_CPU;
}

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

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/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
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	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
	struct kobject			kobj;
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	struct net_device		*dev;
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} ____cacheline_aligned_in_smp;
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#endif /* CONFIG_RPS */
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#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[0];
};
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#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
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#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map))	\
    / sizeof(u16))

/*
 * This structure holds all XPS maps for device.  Maps are indexed by CPU.
 */
struct xps_dev_maps {
	struct rcu_head rcu;
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	struct xps_map __rcu *cpu_map[0];
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};
#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) +		\
    (nr_cpu_ids * sizeof(struct xps_map *)))
#endif /* CONFIG_XPS */

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#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;
};

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#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

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/*
 * This structure defines the management hooks for network devices.
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 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
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 *
 * int (*ndo_init)(struct net_device *dev);
 *     This function is called once when network device is registered.
 *     The network device can use this to any late stage initializaton
 *     or semantic validattion. It can fail with an error code which will
 *     be propogated 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 network device transistions to the up
 *     state.
 *
 * int (*ndo_stop)(struct net_device *dev);
 *     This function is called when network device transistions to the down
 *     state.
 *
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 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
756
 *	Called when a packet needs to be transmitted.
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 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
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 *	Required can not be NULL.
 *
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
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 * 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 promiscious is enabled.
 *
 * void (*ndo_set_rx_mode)(struct net_device *dev);
 *	This function is called device changes address list filtering.
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 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
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 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
776
 *	needs to be changed. If this interface is not defined, the
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 *	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);
 *	Called when a user request an ioctl which can't be handled by
 *	the generic interface code. If not defined ioctl's return
 *	not supported error code.
 *
 * 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 reason, 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. If not defined, any request to change MTU will
 *	will return an error.
 *
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 * void (*ndo_tx_timeout)(struct net_device *dev);
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 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
801
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
802
 *                      struct rtnl_link_stats64 *storage);
803
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
804
 *	Called when a user wants to get the network device usage
805
 *	statistics. Drivers must do one of the following:
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 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
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 *	2. Define @ndo_get_stats to update a net_device_stats structure
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 *	   (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.
814
 *
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 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid);
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is registered.
818
 *
819
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
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 *	If device support VLAN filtering this function is called when a
 *	VLAN id is unregistered.
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 *
 * void (*ndo_poll_controller)(struct net_device *dev);
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 *
 *	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);
 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
829
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
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 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
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 * 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);
835 836 837 838 839
 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
 * 	Called to setup 'tc' number of traffic classes in the net device. 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.
840
 *
841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870
 *	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.
 *
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 * 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.
 *
878 879 880 881 882 883
 * 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.
 *
884 885 886 887 888 889
 *	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.
890
 *
891
 *	Slave management functions (for bridge, bonding, etc).
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 * 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.
897 898
 *
 *      Feature/offload setting functions.
899 900
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
901 902 903 904
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
905
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
906 907 908 909
 *	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.
 *
910 911
 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
912
 *		      const unsigned char *addr, u16 flags)
913
 *	Adds an FDB entry to dev for addr.
914 915
 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
916
 *		      const unsigned char *addr)
917 918 919 920 921
 *	Deletes the FDB entry from dev coresponding to addr.
 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
 *		       struct net_device *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.
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 *
 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)
 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
925
 *			     struct net_device *dev, u32 filter_mask)
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 *
 * 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.
934 935 936 937 938 939
 */
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);
940
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
941 942 943
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
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	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_set_config)(struct net_device *dev,
					          struct ifmap *map);
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	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
958 959
	void			(*ndo_tx_timeout) (struct net_device *dev);

960 961
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
962 963
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

964
	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
965
						       __be16 proto, u16 vid);
966
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
967
						        __be16 proto, u16 vid);
968 969
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
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	int			(*ndo_netpoll_setup)(struct net_device *dev,
971 972
						     struct netpoll_info *info,
						     gfp_t gfp);
973
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
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#endif
#ifdef CONFIG_NET_LL_RX_POLL
	int			(*ndo_ll_poll)(struct napi_struct *dev);
977
#endif
978 979 980 981 982 983
	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);
	int			(*ndo_set_vf_tx_rate)(struct net_device *dev,
						      int vf, int rate);
984 985
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
986 987 988
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
989 990 991 992 993
	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);
994
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
995
#if IS_ENABLED(CONFIG_FCOE)
996 997
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
998 999 1000 1001 1002 1003
	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);
1004 1005 1006 1007
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
1008 1009
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
1010 1011
#endif

1012
#if IS_ENABLED(CONFIG_LIBFCOE)
1013 1014 1015 1016
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
1017
#endif
1018

1019 1020 1021 1022 1023 1024
#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
1025 1026 1027 1028
	int			(*ndo_add_slave)(struct net_device *dev,
						 struct net_device *slave_dev);
	int			(*ndo_del_slave)(struct net_device *dev,
						 struct net_device *slave_dev);
1029 1030
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
1031
	int			(*ndo_set_features)(struct net_device *dev,
1032
						    netdev_features_t features);
1033
	int			(*ndo_neigh_construct)(struct neighbour *n);
1034
	void			(*ndo_neigh_destroy)(struct neighbour *n);
1035 1036

	int			(*ndo_fdb_add)(struct ndmsg *ndm,
1037
					       struct nlattr *tb[],
1038
					       struct net_device *dev,
1039
					       const unsigned char *addr,
1040 1041
					       u16 flags);
	int			(*ndo_fdb_del)(struct ndmsg *ndm,
1042
					       struct nlattr *tb[],
1043
					       struct net_device *dev,
1044
					       const unsigned char *addr);
1045 1046 1047 1048
	int			(*ndo_fdb_dump)(struct sk_buff *skb,
						struct netlink_callback *cb,
						struct net_device *dev,
						int idx);
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	int			(*ndo_bridge_setlink)(struct net_device *dev,
						      struct nlmsghdr *nlh);
	int			(*ndo_bridge_getlink)(struct sk_buff *skb,
						      u32 pid, u32 seq,
1054 1055
						      struct net_device *dev,
						      u32 filter_mask);
1056 1057
	int			(*ndo_bridge_dellink)(struct net_device *dev,
						      struct nlmsghdr *nlh);
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	int			(*ndo_change_carrier)(struct net_device *dev,
						      bool new_carrier);
1060 1061
};

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/*
 *	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.
 *
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

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1072
struct net_device {
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1073 1074 1075 1076

	/*
	 * 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
1077
	 * of the interface.
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	 */
	char			name[IFNAMSIZ];
M
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1080

1081
	/* device name hash chain, please keep it close to name[] */
1082
	struct hlist_node	name_hlist;
1083

1084 1085
	/* snmp alias */
	char 			*ifalias;
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	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
	unsigned long		mem_end;	/* shared mem end	*/
	unsigned long		mem_start;	/* shared mem start	*/
	unsigned long		base_addr;	/* device I/O address	*/
	unsigned int		irq;		/* device IRQ number	*/

	/*
	 *	Some hardware also needs these fields, but they are not
	 *	part of the usual set specified in Space.c.
	 */

	unsigned long		state;

1103
	struct list_head	dev_list;
1104
	struct list_head	napi_list;
1105
	struct list_head	unreg_list;
1106 1107
	struct list_head	upper_dev_list; /* List of upper devices */

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1109
	/* currently active device features */
1110
	netdev_features_t	features;
1111
	/* user-changeable features */
1112
	netdev_features_t	hw_features;
1113
	/* user-requested features */
1114
	netdev_features_t	wanted_features;
1115
	/* mask of features inheritable by VLAN devices */
1116
	netdev_features_t	vlan_features;
1117 1118 1119 1120 1121 1122
	/* 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.
	 */
	netdev_features_t	hw_enc_features;
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	/* mask of fetures inheritable by MPLS */
	netdev_features_t	mpls_features;
1125

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1126 1127 1128 1129
	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

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1130
	struct net_device_stats	stats;
1131 1132 1133
	atomic_long_t		rx_dropped; /* dropped packets by core network
					     * Do not use this in drivers.
					     */
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1135
#ifdef CONFIG_WIRELESS_EXT
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1136 1137 1138 1139 1140
	/* List of functions to handle Wireless Extensions (instead of ioctl).
	 * See <net/iw_handler.h> for details. Jean II */
	const struct iw_handler_def *	wireless_handlers;
	/* Instance data managed by the core of Wireless Extensions. */
	struct iw_public_data *	wireless_data;
1141
#endif
1142 1143
	/* Management operations */
	const struct net_device_ops *netdev_ops;
1144
	const struct ethtool_ops *ethtool_ops;
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1146 1147 1148
	/* Hardware header description */
	const struct header_ops *header_ops;

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1149
	unsigned int		flags;	/* interface flags (a la BSD)	*/
1150 1151
	unsigned int		priv_flags; /* Like 'flags' but invisible to userspace.
					     * See if.h for definitions. */
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	unsigned short		gflags;
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

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1155 1156 1157
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

1158 1159 1160
	unsigned char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

1161
	unsigned int		mtu;	/* interface MTU value		*/
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	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

1165 1166 1167 1168 1169 1170 1171
	/* extra head- and tailroom the hardware may need, but not in all cases
	 * can this be guaranteed, especially tailroom. Some cases also use
	 * LL_MAX_HEADER instead to allocate the skb.
	 */
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

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	/* Interface address info. */
1173
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1174
	unsigned char		addr_assign_type; /* hw address assignment type */
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	unsigned char		addr_len;	/* hardware address length	*/
1176
	unsigned char		neigh_priv_len;
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	unsigned short          dev_id;		/* for shared network cards */

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1179
	spinlock_t		addr_list_lock;
1180 1181
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
1182 1183 1184 1185 1186 1187 1188
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						    * hw addresses
						    */
#ifdef CONFIG_SYSFS
	struct kset		*queues_kset;
#endif

1189
	bool			uc_promisc;
1190 1191
	unsigned int		promiscuity;
	unsigned int		allmulti;
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	/* Protocol specific pointers */
1195

1196
#if IS_ENABLED(CONFIG_VLAN_8021Q)
1197
	struct vlan_info __rcu	*vlan_info;	/* VLAN info */
1198
#endif
1199
#if IS_ENABLED(CONFIG_NET_DSA)
1200
	struct dsa_switch_tree	*dsa_ptr;	/* dsa specific data */
1201
#endif
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	void 			*atalk_ptr;	/* AppleTalk link 	*/
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1203
	struct in_device __rcu	*ip_ptr;	/* IPv4 specific data	*/
1204
	struct dn_dev __rcu     *dn_ptr;        /* DECnet specific data */
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	struct inet6_dev __rcu	*ip6_ptr;       /* IPv6 specific data */
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	void			*ax25_ptr;	/* AX.25 specific data */
1207 1208
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
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1210
/*
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1211
 * Cache lines mostly used on receive path (including eth_type_trans())
1212
 */
1213 1214 1215 1216 1217 1218 1219 1220
	unsigned long		last_rx;	/* Time of last Rx
						 * This should not be set in
						 * drivers, unless really needed,
						 * because network stack (bonding)
						 * use it if/when necessary, to
						 * avoid dirtying this cache line.
						 */

1221
	/* Interface address info used in eth_type_trans() */
1222 1223 1224 1225
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

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1226

1227
#ifdef CONFIG_RPS
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1228 1229
	struct netdev_rx_queue	*_rx;

1230
	/* Number of RX queues allocated at register_netdev() time */
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1231
	unsigned int		num_rx_queues;
1232 1233 1234

	/* Number of RX queues currently active in device */
	unsigned int		real_num_rx_queues;
1235

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#endif
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1237

1238 1239
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1240

1241
	struct netdev_queue __rcu *ingress_queue;
1242 1243
	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/

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/*
 * Cache lines mostly used on transmit path
 */
1248
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
1249 1250

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
1251
	unsigned int		num_tx_queues;
1252 1253 1254 1255

	/* Number of TX queues currently active in device  */
	unsigned int		real_num_tx_queues;

1256 1257 1258
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

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	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
1260
	spinlock_t		tx_global_lock;
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1261

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1262
#ifdef CONFIG_XPS
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1263
	struct xps_dev_maps __rcu *xps_maps;
T
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1264
#endif
1265 1266 1267 1268 1269 1270
#ifdef CONFIG_RFS_ACCEL
	/* 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. */
	struct cpu_rmap		*rx_cpu_rmap;
#endif
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1272
	/* These may be needed for future network-power-down code. */
1273 1274 1275 1276 1277

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1278 1279 1280 1281 1282
	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/

	int			watchdog_timeo; /* used by dev_watchdog() */
	struct timer_list	watchdog_timer;

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	/* Number of references to this device */
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1284
	int __percpu		*pcpu_refcnt;
1285

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1286 1287 1288 1289 1290
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

1291
	struct list_head	link_watch_list;
1292

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	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1295
	       NETREG_REGISTERED,	/* completed register_netdevice */
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	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1299
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1300 1301 1302
	} reg_state:8;

	bool dismantle; /* device is going do be freed */
1303 1304 1305 1306 1307

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
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1309 1310
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
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1311 1312

#ifdef CONFIG_NETPOLL
1313
	struct netpoll_info __rcu	*npinfo;
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1314
#endif
1315

1316
#ifdef CONFIG_NET_NS
1317 1318
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1319
#endif
1320

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1321
	/* mid-layer private */
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1322 1323 1324
	union {
		void				*ml_priv;
		struct pcpu_lstats __percpu	*lstats; /* loopback stats */
1325
		struct pcpu_tstats __percpu	*tstats; /* tunnel stats */
1326
		struct pcpu_dstats __percpu	*dstats; /* dummy stats */
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1327
		struct pcpu_vstats __percpu	*vstats; /* veth stats */
E
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1328
	};
1329
	/* GARP */
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1330
	struct garp_port __rcu	*garp_port;
1331 1332
	/* MRP */
	struct mrp_port __rcu	*mrp_port;
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1333 1334

	/* class/net/name entry */
1335
	struct device		dev;
1336 1337
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
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1338 1339 1340

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1341

1342 1343 1344
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1345 1346
#define GSO_MAX_SEGS		65535
	u16			gso_max_segs;
1347

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1348
#ifdef CONFIG_DCB
1349
	/* Data Center Bridging netlink ops */
1350
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1351
#endif
1352 1353 1354
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1355

1356
#if IS_ENABLED(CONFIG_FCOE)
1357 1358
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
1359 1360 1361
#endif
#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
	struct netprio_map __rcu *priomap;
1362
#endif
1363 1364
	/* phy device may attach itself for hardware timestamping */
	struct phy_device *phydev;
1365

1366 1367
	struct lock_class_key *qdisc_tx_busylock;

1368 1369
	/* group the device belongs to */
	int group;
1370 1371

	struct pm_qos_request	pm_qos_req;
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1372
};
1373
#define to_net_dev(d) container_of(d, struct net_device, dev)
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1374 1375 1376

#define	NETDEV_ALIGN		32

1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
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;
}

static inline
void netdev_reset_tc(struct net_device *dev)
{
	dev->num_tc = 0;
	memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
	memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
}

static inline
int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
{
	if (tc >= dev->num_tc)
		return -EINVAL;

	dev->tc_to_txq[tc].count = count;
	dev->tc_to_txq[tc].offset = offset;
	return 0;
}

static inline
int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
{
	if (num_tc > TC_MAX_QUEUE)
		return -EINVAL;

	dev->num_tc = num_tc;
	return 0;
}

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

1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	return &dev->_tx[index];
}

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);
}

1447 1448
extern struct netdev_queue *netdev_pick_tx(struct net_device *dev,
					   struct sk_buff *skb);
1449
extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb);
1450

1451 1452 1453 1454 1455 1456
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
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1457
	return read_pnet(&dev->nd_net);
1458 1459 1460
}

static inline
1461
void dev_net_set(struct net_device *dev, struct net *net)
1462 1463
{
#ifdef CONFIG_NET_NS
1464 1465
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1466 1467 1468
#endif
}

1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
static inline bool netdev_uses_dsa_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_DSA
	if (dev->dsa_ptr != NULL)
		return dsa_uses_dsa_tags(dev->dsa_ptr);
#endif

	return 0;
}

1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
static inline bool netdev_uses_trailer_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_TRAILER
	if (dev->dsa_ptr != NULL)
		return dsa_uses_trailer_tags(dev->dsa_ptr);
#endif

	return 0;
}

1489 1490 1491 1492 1493 1494
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1495
static inline void *netdev_priv(const struct net_device *dev)
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1496
{
1497
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
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1498 1499 1500 1501 1502
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1503
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
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1505 1506 1507 1508 1509 1510
/* Set the sysfs device type for the network logical device to allow
 * fin grained indentification of different network device types. For
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

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1511 1512 1513 1514 1515
/* Default NAPI poll() weight
 * Device drivers are strongly advised to not use bigger value
 */
#define NAPI_POLL_WEIGHT 64

1516 1517 1518 1519 1520 1521 1522 1523 1524 1525
/**
 *	netif_napi_add - initialize a napi context
 *	@dev:  network device
 *	@napi: napi context
 *	@poll: polling function
 *	@weight: default weight
 *
 * netif_napi_add() must be used to initialize a napi context prior to calling
 * *any* of the other napi related functions.
 */
1526 1527
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1528

1529 1530 1531 1532 1533 1534
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1535 1536 1537
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1538 1539 1540
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1541 1542 1543
	/* Length of frag0. */
	unsigned int frag0_len;

1544 1545 1546
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1547 1548 1549 1550
	/* This is non-zero if the packet cannot be merged with the new skb. */
	int flush;

	/* Number of segments aggregated. */
1551 1552 1553 1554
	u16	count;

	/* This is non-zero if the packet may be of the same flow. */
	u8	same_flow;
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1555 1556

	/* Free the skb? */
1557
	u8	free;
1558 1559
#define NAPI_GRO_FREE		  1
#define NAPI_GRO_FREE_STOLEN_HEAD 2
1560 1561 1562

	/* jiffies when first packet was created/queued */
	unsigned long age;
1563 1564 1565

	/* Used in ipv6_gro_receive() */
	int	proto;
1566 1567 1568

	/* used in skb_gro_receive() slow path */
	struct sk_buff *last;
1569 1570 1571
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1572

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1573
struct packet_type {
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1574 1575 1576 1577 1578 1579
	__be16			type;	/* This is really htons(ether_type). */
	struct net_device	*dev;	/* NULL is wildcarded here	     */
	int			(*func) (struct sk_buff *,
					 struct net_device *,
					 struct packet_type *,
					 struct net_device *);
1580 1581
	bool			(*id_match)(struct packet_type *ptype,
					    struct sock *sk);
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1582 1583 1584 1585
	void			*af_packet_priv;
	struct list_head	list;
};

1586
struct offload_callbacks {
1587
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
1588
						netdev_features_t features);
1589
	int			(*gso_send_check)(struct sk_buff *skb);
1590 1591 1592
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
1593 1594 1595 1596 1597 1598
};

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

#include <linux/notifier.h>

1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
/* netdevice notifier chain. Please remember to update the rtnetlink
 * notification exclusion list in rtnetlink_event() when adding new
 * types.
 */
#define NETDEV_UP	0x0001	/* For now you can't veto a device up/down */
#define NETDEV_DOWN	0x0002
#define NETDEV_REBOOT	0x0003	/* Tell a protocol stack a network interface
				   detected a hardware crash and restarted
				   - we can use this eg to kick tcp sessions
				   once done */
#define NETDEV_CHANGE	0x0004	/* Notify device state change */
#define NETDEV_REGISTER 0x0005
#define NETDEV_UNREGISTER	0x0006
#define NETDEV_CHANGEMTU	0x0007
#define NETDEV_CHANGEADDR	0x0008
#define NETDEV_GOING_DOWN	0x0009
#define NETDEV_CHANGENAME	0x000A
#define NETDEV_FEAT_CHANGE	0x000B
#define NETDEV_BONDING_FAILOVER 0x000C
#define NETDEV_PRE_UP		0x000D
#define NETDEV_PRE_TYPE_CHANGE	0x000E
#define NETDEV_POST_TYPE_CHANGE	0x000F
#define NETDEV_POST_INIT	0x0010
1626
#define NETDEV_UNREGISTER_FINAL 0x0011
1627 1628 1629
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014
1630
#define NETDEV_CHANGEUPPER	0x0015
1631 1632 1633

extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
1634 1635 1636 1637 1638

struct netdev_notifier_info {
	struct net_device *dev;
};

1639 1640 1641 1642 1643
struct netdev_notifier_change_info {
	struct netdev_notifier_info info; /* must be first */
	unsigned int flags_changed;
};

1644 1645 1646 1647 1648 1649
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
					     struct net_device *dev)
{
	info->dev = dev;
}

1650 1651 1652 1653 1654 1655 1656 1657
static inline struct net_device *
netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
{
	return info->dev;
}

extern int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev,
					 struct netdev_notifier_info *info);
1658 1659 1660
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);


L
Linus Torvalds 已提交
1661 1662
extern rwlock_t				dev_base_lock;		/* Device list lock */

1663
extern seqcount_t	devnet_rename_seq;	/* Device rename seq */
1664

1665

1666 1667
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1668 1669
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1670 1671
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1672 1673 1674 1675
#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)
1676 1677
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1678 1679 1680
#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)
1681
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1682

1683 1684 1685 1686 1687
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1688
	net = dev_net(dev);
1689 1690 1691 1692
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1693 1694 1695 1696 1697 1698
static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
E
Eric Dumazet 已提交
1699
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1700 1701 1702
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1703 1704 1705 1706 1707
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);
}
1708

E
Eric Dumazet 已提交
1709 1710 1711 1712 1713 1714 1715
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);
}

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Linus Torvalds 已提交
1716 1717
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1718 1719
extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
					      const char *hwaddr);
1720 1721
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
L
Linus Torvalds 已提交
1722 1723 1724
extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);
1725 1726 1727
extern void		dev_add_offload(struct packet_offload *po);
extern void		dev_remove_offload(struct packet_offload *po);
extern void		__dev_remove_offload(struct packet_offload *po);
L
Linus Torvalds 已提交
1728

E
Eric Dumazet 已提交
1729 1730
extern struct net_device	*dev_get_by_flags_rcu(struct net *net, unsigned short flags,
						      unsigned short mask);
1731
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
1732
extern struct net_device	*dev_get_by_name_rcu(struct net *net, const char *name);
1733
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
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1734 1735 1736
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
1737
extern void		dev_disable_lro(struct net_device *dev);
1738
extern int		dev_loopback_xmit(struct sk_buff *newskb);
L
Linus Torvalds 已提交
1739 1740
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1741 1742
extern void		unregister_netdevice_queue(struct net_device *dev,
						   struct list_head *head);
1743
extern void		unregister_netdevice_many(struct list_head *head);
1744 1745 1746 1747 1748
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

E
Eric Dumazet 已提交
1749
extern int 		netdev_refcnt_read(const struct net_device *dev);
L
Linus Torvalds 已提交
1750 1751
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
1752 1753
extern int		init_dummy_netdev(struct net_device *dev);

1754 1755
extern struct net_device	*dev_get_by_index(struct net *net, int ifindex);
extern struct net_device	*__dev_get_by_index(struct net *net, int ifindex);
1756
extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
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Linus Torvalds 已提交
1757 1758 1759 1760
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);

static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
{
	return NAPI_GRO_CB(skb)->data_offset;
}

static inline unsigned int skb_gro_len(const struct sk_buff *skb)
{
	return skb->len - NAPI_GRO_CB(skb)->data_offset;
}

static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
{
	NAPI_GRO_CB(skb)->data_offset += len;
}

1779 1780
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
1781
{
1782 1783
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
1784

1785 1786 1787 1788
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
1789

1790 1791 1792
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
1793 1794 1795
	if (!pskb_may_pull(skb, hlen))
		return NULL;

1796 1797
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
1798
	return skb->data + offset;
1799
}
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Linus Torvalds 已提交
1800

1801 1802
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1803
	return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1804 1805
}

H
Herbert Xu 已提交
1806 1807
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
1808 1809
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
1810 1811
}

1812 1813
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1814
				  const void *daddr, const void *saddr,
1815
				  unsigned int len)
1816
{
1817
	if (!dev->header_ops || !dev->header_ops->create)
1818
		return 0;
1819 1820

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1821 1822
}

S
Stephen Hemminger 已提交
1823 1824 1825 1826 1827
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1828
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1829
		return 0;
1830
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
1831 1832
}

L
Linus Torvalds 已提交
1833 1834 1835 1836 1837 1838 1839
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852
#ifdef CONFIG_NET_FLOW_LIMIT
#define FLOW_LIMIT_HISTORY	(1 << 8)	/* must be ^2 */
struct sd_flow_limit {
	u64			count;
	unsigned int		num_buckets;
	unsigned int		history_head;
	u16			history[FLOW_LIMIT_HISTORY];
	u8			buckets[];
};

extern int netdev_flow_limit_table_len;
#endif /* CONFIG_NET_FLOW_LIMIT */

L
Linus Torvalds 已提交
1853
/*
E
Eric Dumazet 已提交
1854
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
1855
 */
E
Eric Dumazet 已提交
1856
struct softnet_data {
1857
	struct Qdisc		*output_queue;
1858
	struct Qdisc		**output_queue_tailp;
L
Linus Torvalds 已提交
1859 1860
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
1861
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
1862

C
Changli Gao 已提交
1863
	/* stats */
1864 1865 1866 1867
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
C
Changli Gao 已提交
1868

1869
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
1870 1871 1872
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
1873
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
1874 1875
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
1876
	unsigned int		input_queue_head;
1877
	unsigned int		input_queue_tail;
1878
#endif
1879
	unsigned int		dropped;
T
Tom Herbert 已提交
1880
	struct sk_buff_head	input_pkt_queue;
1881
	struct napi_struct	backlog;
1882 1883 1884 1885

#ifdef CONFIG_NET_FLOW_LIMIT
	struct sd_flow_limit	*flow_limit;
#endif
L
Linus Torvalds 已提交
1886 1887
};

1888
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
1889 1890
{
#ifdef CONFIG_RPS
1891 1892 1893 1894 1895 1896 1897 1898 1899
	sd->input_queue_head++;
#endif
}

static inline void input_queue_tail_incr_save(struct softnet_data *sd,
					      unsigned int *qtail)
{
#ifdef CONFIG_RPS
	*qtail = ++sd->input_queue_tail;
T
Tom Herbert 已提交
1900 1901 1902
#endif
}

T
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1903
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
1904

1905
extern void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
1906

1907
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
1908
{
1909
	if (!(txq->state & QUEUE_STATE_ANY_XOFF))
1910
		__netif_schedule(txq->qdisc);
1911 1912
}

1913 1914 1915 1916 1917 1918 1919 1920
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));
}

1921 1922
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
1923
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1924 1925
}

1926 1927 1928 1929 1930 1931
/**
 *	netif_start_queue - allow transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 */
L
Linus Torvalds 已提交
1932 1933
static inline void netif_start_queue(struct net_device *dev)
{
1934
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1935 1936
}

1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
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);
	}
}

1947
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1948 1949
{
#ifdef CONFIG_NETPOLL_TRAP
1950
	if (netpoll_trap()) {
1951
		netif_tx_start_queue(dev_queue);
L
Linus Torvalds 已提交
1952
		return;
1953
	}
L
Linus Torvalds 已提交
1954
#endif
1955
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
1956
		__netif_schedule(dev_queue->qdisc);
1957 1958
}

1959 1960 1961 1962 1963 1964 1965
/**
 *	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.
 */
1966 1967
static inline void netif_wake_queue(struct net_device *dev)
{
1968
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1969 1970
}

1971 1972 1973 1974 1975 1976 1977 1978 1979 1980
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);
	}
}

1981 1982
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
1983
	if (WARN_ON(!dev_queue)) {
1984
		pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1985 1986
		return;
	}
1987
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1988 1989
}

1990 1991 1992 1993 1994 1995 1996
/**
 *	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.
 */
L
Linus Torvalds 已提交
1997 1998
static inline void netif_stop_queue(struct net_device *dev)
{
1999
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2000 2001
}

2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
static inline void netif_tx_stop_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_stop_queue(txq);
	}
}

2012
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2013
{
2014
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2015 2016
}

2017 2018 2019 2020 2021 2022
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
2023
static inline bool netif_queue_stopped(const struct net_device *dev)
L
Linus Torvalds 已提交
2024
{
2025
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2026 2027
}

2028
static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2029
{
2030 2031 2032
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

2033
static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2034 2035 2036 2037
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
}

2038 2039 2040
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
T
Tom Herbert 已提交
2041 2042
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058

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

	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();

	/* 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);
T
Tom Herbert 已提交
2059
#endif
2060 2061 2062 2063 2064 2065 2066 2067
}

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 void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
2068
					     unsigned int pkts, unsigned int bytes)
2069
{
T
Tom Herbert 已提交
2070
#ifdef CONFIG_BQL
2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087
	if (unlikely(!bytes))
		return;

	dql_completed(&dev_queue->dql, bytes);

	/*
	 * Without the memory barrier there is a small possiblity that
	 * netdev_tx_sent_queue will miss the update and cause the queue to
	 * be stopped forever
	 */
	smp_mb();

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

	if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
		netif_schedule_queue(dev_queue);
T
Tom Herbert 已提交
2088
#endif
2089 2090 2091
}

static inline void netdev_completed_queue(struct net_device *dev,
2092
					  unsigned int pkts, unsigned int bytes)
2093 2094 2095 2096 2097 2098
{
	netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
}

static inline void netdev_tx_reset_queue(struct netdev_queue *q)
{
T
Tom Herbert 已提交
2099
#ifdef CONFIG_BQL
2100
	clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
T
Tom Herbert 已提交
2101 2102
	dql_reset(&q->dql);
#endif
2103 2104 2105 2106 2107
}

static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2108 2109
}

2110 2111 2112 2113 2114 2115
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
2116
static inline bool netif_running(const struct net_device *dev)
L
Linus Torvalds 已提交
2117 2118 2119 2120
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

2121 2122 2123 2124 2125 2126
/*
 * 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.
 */
2127 2128 2129 2130 2131 2132 2133 2134

/**
 *	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.
 */
2135 2136
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
2137
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2138 2139

	netif_tx_start_queue(txq);
2140 2141
}

2142 2143 2144 2145 2146 2147 2148
/**
 *	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.
 */
2149 2150
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
2151
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2152 2153 2154 2155
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
2156
	netif_tx_stop_queue(txq);
2157 2158
}

2159 2160 2161 2162 2163 2164 2165
/**
 *	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.
 */
2166 2167
static inline bool __netif_subqueue_stopped(const struct net_device *dev,
					    u16 queue_index)
2168
{
2169
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2170 2171

	return netif_tx_queue_stopped(txq);
2172 2173
}

2174 2175
static inline bool netif_subqueue_stopped(const struct net_device *dev,
					  struct sk_buff *skb)
2176 2177 2178
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
2179 2180 2181 2182 2183 2184 2185 2186

/**
 *	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.
 */
2187 2188
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
2189
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2190 2191 2192 2193
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
2194
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2195
		__netif_schedule(txq->qdisc);
2196 2197
}

2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209
#ifdef CONFIG_XPS
extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask,
			       u16 index);
#else
static inline int netif_set_xps_queue(struct net_device *dev,
				      struct cpumask *mask,
				      u16 index)
{
	return 0;
}
#endif

2210 2211 2212 2213 2214 2215 2216 2217 2218 2219
/*
 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
 * as a distribution range limit for the returned value.
 */
static inline u16 skb_tx_hash(const struct net_device *dev,
			      const struct sk_buff *skb)
{
	return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2220 2221 2222 2223 2224 2225
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2226
static inline bool netif_is_multiqueue(const struct net_device *dev)
2227
{
E
Eric Dumazet 已提交
2228
	return dev->num_tx_queues > 1;
2229
}
L
Linus Torvalds 已提交
2230

2231 2232
extern int netif_set_real_num_tx_queues(struct net_device *dev,
					unsigned int txq);
2233

2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
#ifdef CONFIG_RPS
extern 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 rxq)
{
	return 0;
}
#endif

2245 2246 2247
static inline int netif_copy_real_num_queues(struct net_device *to_dev,
					     const struct net_device *from_dev)
{
2248 2249 2250 2251 2252 2253
	int err;

	err = netif_set_real_num_tx_queues(to_dev,
					   from_dev->real_num_tx_queues);
	if (err)
		return err;
2254 2255 2256 2257 2258 2259 2260 2261
#ifdef CONFIG_RPS
	return netif_set_real_num_rx_queues(to_dev,
					    from_dev->real_num_rx_queues);
#else
	return 0;
#endif
}

2262 2263 2264
#define DEFAULT_MAX_NUM_RSS_QUEUES	(8)
extern int netif_get_num_default_rss_queues(void);

L
Linus Torvalds 已提交
2265
/* Use this variant when it is known for sure that it
2266 2267
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
Linus Torvalds 已提交
2268
 */
2269
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
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2270 2271

/* Use this variant in places where it could be invoked
2272 2273
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
2274
 */
2275
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
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2276 2277 2278 2279

extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
extern int		netif_receive_skb(struct sk_buff *skb);
2280
extern gro_result_t	napi_gro_receive(struct napi_struct *napi,
2281
					 struct sk_buff *skb);
2282
extern void		napi_gro_flush(struct napi_struct *napi, bool flush_old);
2283
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
2284
extern gro_result_t	napi_gro_frags(struct napi_struct *napi);
2285 2286 2287 2288 2289 2290 2291

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

2292
extern int netdev_rx_handler_register(struct net_device *dev,
J
Jiri Pirko 已提交
2293 2294
				      rx_handler_func_t *rx_handler,
				      void *rx_handler_data);
2295 2296
extern void netdev_rx_handler_unregister(struct net_device *dev);

2297
extern bool		dev_valid_name(const char *name);
2298 2299
extern int		dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int		dev_ethtool(struct net *net, struct ifreq *);
2300
extern unsigned int	dev_get_flags(const struct net_device *);
2301
extern int		__dev_change_flags(struct net_device *, unsigned int flags);
2302
extern int		dev_change_flags(struct net_device *, unsigned int);
2303
extern void		__dev_notify_flags(struct net_device *, unsigned int old_flags);
2304
extern int		dev_change_name(struct net_device *, const char *);
2305
extern int		dev_set_alias(struct net_device *, const char *, size_t);
2306 2307
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
Linus Torvalds 已提交
2308
extern int		dev_set_mtu(struct net_device *, int);
2309
extern void		dev_set_group(struct net_device *, int);
L
Linus Torvalds 已提交
2310 2311
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
J
Jiri Pirko 已提交
2312 2313
extern int		dev_change_carrier(struct net_device *,
					   bool new_carrier);
2314
extern int		dev_hard_start_xmit(struct sk_buff *skb,
2315 2316
					    struct net_device *dev,
					    struct netdev_queue *txq);
2317 2318
extern int		dev_forward_skb(struct net_device *dev,
					struct sk_buff *skb);
L
Linus Torvalds 已提交
2319

2320
extern int		netdev_budget;
L
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2321 2322 2323 2324

/* Called by rtnetlink.c:rtnl_unlock() */
extern void netdev_run_todo(void);

2325 2326 2327 2328
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
2329
 * Release reference to device to allow it to be freed.
2330
 */
L
Linus Torvalds 已提交
2331 2332
static inline void dev_put(struct net_device *dev)
{
2333
	this_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
2334 2335
}

2336 2337 2338 2339
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
2340
 * Hold reference to device to keep it from being freed.
2341
 */
2342 2343
static inline void dev_hold(struct net_device *dev)
{
2344
	this_cpu_inc(*dev->pcpu_refcnt);
2345
}
L
Linus Torvalds 已提交
2346 2347 2348 2349

/* 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.
S
Stefan Rompf 已提交
2350 2351 2352 2353
 *
 * 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.
L
Linus Torvalds 已提交
2354 2355
 */

2356
extern void linkwatch_init_dev(struct net_device *dev);
L
Linus Torvalds 已提交
2357
extern void linkwatch_fire_event(struct net_device *dev);
2358
extern void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
2359

2360 2361 2362 2363 2364 2365
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
2366
static inline bool netif_carrier_ok(const struct net_device *dev)
L
Linus Torvalds 已提交
2367 2368 2369 2370
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

2371 2372
extern unsigned long dev_trans_start(struct net_device *dev);

L
Linus Torvalds 已提交
2373 2374
extern void __netdev_watchdog_up(struct net_device *dev);

2375
extern void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
2376

2377
extern void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
2378

2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391
/**
 *	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.
 *
 */
S
Stefan Rompf 已提交
2392 2393 2394 2395 2396 2397
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2398 2399 2400 2401 2402 2403
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
2404 2405 2406 2407 2408 2409
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2410 2411 2412 2413 2414 2415
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
2416
static inline bool netif_dormant(const struct net_device *dev)
S
Stefan Rompf 已提交
2417 2418 2419 2420 2421
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


2422 2423 2424 2425 2426 2427
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
2428
static inline bool netif_oper_up(const struct net_device *dev)
E
Eric Dumazet 已提交
2429
{
S
Stefan Rompf 已提交
2430 2431 2432 2433
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

2434 2435 2436 2437 2438 2439
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
2440
static inline bool netif_device_present(struct net_device *dev)
L
Linus Torvalds 已提交
2441 2442 2443 2444
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

2445
extern void netif_device_detach(struct net_device *dev);
L
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2446

2447
extern void netif_device_attach(struct net_device *dev);
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2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497

/*
 * Network interface message level settings
 */

enum {
	NETIF_MSG_DRV		= 0x0001,
	NETIF_MSG_PROBE		= 0x0002,
	NETIF_MSG_LINK		= 0x0004,
	NETIF_MSG_TIMER		= 0x0008,
	NETIF_MSG_IFDOWN	= 0x0010,
	NETIF_MSG_IFUP		= 0x0020,
	NETIF_MSG_RX_ERR	= 0x0040,
	NETIF_MSG_TX_ERR	= 0x0080,
	NETIF_MSG_TX_QUEUED	= 0x0100,
	NETIF_MSG_INTR		= 0x0200,
	NETIF_MSG_TX_DONE	= 0x0400,
	NETIF_MSG_RX_STATUS	= 0x0800,
	NETIF_MSG_PKTDATA	= 0x1000,
	NETIF_MSG_HW		= 0x2000,
	NETIF_MSG_WOL		= 0x4000,
};

#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 (1 << debug_value) - 1;
}

2498
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
2499
{
2500 2501
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
2502 2503
}

2504 2505 2506 2507 2508 2509
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

2510
static inline bool __netif_tx_trylock(struct netdev_queue *txq)
2511
{
2512
	bool ok = spin_trylock(&txq->_xmit_lock);
2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529
	if (likely(ok))
		txq->xmit_lock_owner = smp_processor_id();
	return ok;
}

static inline void __netif_tx_unlock(struct netdev_queue *txq)
{
	txq->xmit_lock_owner = -1;
	spin_unlock(&txq->_xmit_lock);
}

static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
{
	txq->xmit_lock_owner = -1;
	spin_unlock_bh(&txq->_xmit_lock);
}

E
Eric Dumazet 已提交
2530 2531 2532 2533 2534 2535
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

2536 2537 2538 2539 2540 2541
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
2542 2543
static inline void netif_tx_lock(struct net_device *dev)
{
2544
	unsigned int i;
2545
	int cpu;
2546

2547 2548
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
2549 2550
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2551 2552 2553 2554 2555 2556 2557

		/* We are the only thread of execution doing a
		 * freeze, but we have to grab the _xmit_lock in
		 * order to synchronize with threads which are in
		 * the ->hard_start_xmit() handler and already
		 * checked the frozen bit.
		 */
2558
		__netif_tx_lock(txq, cpu);
2559 2560
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
2561
	}
H
Herbert Xu 已提交
2562 2563 2564 2565
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
2566 2567
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
2568 2569 2570 2571
}

static inline void netif_tx_unlock(struct net_device *dev)
{
2572 2573 2574 2575
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2576

2577 2578 2579 2580 2581
		/* No need to grab the _xmit_lock here.  If the
		 * queue is not stopped for another reason, we
		 * force a schedule.
		 */
		clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
2582
		netif_schedule_queue(txq);
2583 2584
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
2585 2586 2587 2588
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
2589 2590
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
2591 2592
}

2593
#define HARD_TX_LOCK(dev, txq, cpu) {			\
2594
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2595
		__netif_tx_lock(txq, cpu);		\
2596 2597 2598
	}						\
}

2599
#define HARD_TX_UNLOCK(dev, txq) {			\
2600
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2601
		__netif_tx_unlock(txq);			\
2602 2603 2604
	}						\
}

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2605 2606
static inline void netif_tx_disable(struct net_device *dev)
{
2607
	unsigned int i;
2608
	int cpu;
2609

2610 2611
	local_bh_disable();
	cpu = smp_processor_id();
2612 2613
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2614 2615

		__netif_tx_lock(txq, cpu);
2616
		netif_tx_stop_queue(txq);
2617
		__netif_tx_unlock(txq);
2618
	}
2619
	local_bh_enable();
L
Linus Torvalds 已提交
2620 2621
}

2622 2623 2624 2625 2626
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

2627 2628 2629 2630 2631
static inline void netif_addr_lock_nested(struct net_device *dev)
{
	spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
}

2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646
static inline void netif_addr_lock_bh(struct net_device *dev)
{
	spin_lock_bh(&dev->addr_list_lock);
}

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);
}

2647
/*
2648
 * dev_addrs walker. Should be used only for read access. Call with
2649 2650 2651
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2652
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2653

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2654 2655 2656 2657 2658
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
T
Tom Herbert 已提交
2659
extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2660
				       void (*setup)(struct net_device *),
T
Tom Herbert 已提交
2661
				       unsigned int txqs, unsigned int rxqs);
2662
#define alloc_netdev(sizeof_priv, name, setup) \
T
Tom Herbert 已提交
2663 2664 2665 2666 2667
	alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)

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

L
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2668 2669
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
2670

2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686
/* General hardware address lists handling functions */
extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
				  struct netdev_hw_addr_list *from_list,
				  int addr_len, unsigned char addr_type);
extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
				   struct netdev_hw_addr_list *from_list,
				   int addr_len, unsigned char addr_type);
extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
			  struct netdev_hw_addr_list *from_list,
			  int addr_len);
extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
			     struct netdev_hw_addr_list *from_list,
			     int addr_len);
extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
extern void __hw_addr_init(struct netdev_hw_addr_list *list);

2687
/* Functions used for device addresses handling */
2688
extern int dev_addr_add(struct net_device *dev, const unsigned char *addr,
2689
			unsigned char addr_type);
2690
extern int dev_addr_del(struct net_device *dev, const unsigned char *addr,
2691 2692 2693 2694 2695 2696 2697
			unsigned char addr_type);
extern int dev_addr_add_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
extern int dev_addr_del_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
2698 2699 2700 2701
extern void dev_addr_flush(struct net_device *dev);
extern int dev_addr_init(struct net_device *dev);

/* Functions used for unicast addresses handling */
2702 2703 2704
extern int dev_uc_add(struct net_device *dev, const unsigned char *addr);
extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
extern int dev_uc_del(struct net_device *dev, const unsigned char *addr);
2705
extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2706
extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
2707 2708 2709
extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
extern void dev_uc_flush(struct net_device *dev);
extern void dev_uc_init(struct net_device *dev);
2710

2711
/* Functions used for multicast addresses handling */
2712 2713 2714 2715 2716
extern int dev_mc_add(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_del(struct net_device *dev, const unsigned char *addr);
extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
2717
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2718
extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
2719 2720 2721
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
extern void dev_mc_flush(struct net_device *dev);
extern void dev_mc_init(struct net_device *dev);
2722

2723 2724 2725
/* Functions used for secondary unicast and multicast support */
extern void		dev_set_rx_mode(struct net_device *dev);
extern void		__dev_set_rx_mode(struct net_device *dev);
2726 2727
extern int		dev_set_promiscuity(struct net_device *dev, int inc);
extern int		dev_set_allmulti(struct net_device *dev, int inc);
L
Linus Torvalds 已提交
2728
extern void		netdev_state_change(struct net_device *dev);
2729
extern void		netdev_notify_peers(struct net_device *dev);
2730
extern void		netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
2731
/* Load a device via the kmod */
2732
extern void		dev_load(struct net *net, const char *name);
2733 2734
extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					       struct rtnl_link_stats64 *storage);
2735 2736
extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
				    const struct net_device_stats *netdev_stats);
2737

L
Linus Torvalds 已提交
2738
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
2739
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
2740
extern int		weight_p;
2741
extern int		bpf_jit_enable;
J
Jiri Pirko 已提交
2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753

extern bool netdev_has_upper_dev(struct net_device *dev,
				 struct net_device *upper_dev);
extern bool netdev_has_any_upper_dev(struct net_device *dev);
extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
extern int netdev_upper_dev_link(struct net_device *dev,
				 struct net_device *upper_dev);
extern int netdev_master_upper_dev_link(struct net_device *dev,
					struct net_device *upper_dev);
extern void netdev_upper_dev_unlink(struct net_device *dev,
				    struct net_device *upper_dev);
2754
extern int skb_checksum_help(struct sk_buff *skb);
2755 2756
extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
	netdev_features_t features, bool tx_path);
2757 2758
extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
					  netdev_features_t features);
2759 2760 2761 2762 2763 2764

static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{
	return __skb_gso_segment(skb, features, true);
}
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777
__be16 skb_network_protocol(struct sk_buff *skb);

static inline bool can_checksum_protocol(netdev_features_t features,
					 __be16 protocol)
{
	return ((features & NETIF_F_GEN_CSUM) ||
		((features & NETIF_F_V4_CSUM) &&
		 protocol == htons(ETH_P_IP)) ||
		((features & NETIF_F_V6_CSUM) &&
		 protocol == htons(ETH_P_IPV6)) ||
		((features & NETIF_F_FCOE_CRC) &&
		 protocol == htons(ETH_P_FCOE)));
}
2778

2779 2780 2781 2782 2783 2784 2785
#ifdef CONFIG_BUG
extern void netdev_rx_csum_fault(struct net_device *dev);
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
2786 2787 2788 2789
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

2790
#ifdef CONFIG_PROC_FS
2791 2792 2793
extern int __init dev_proc_init(void);
#else
#define dev_proc_init() 0
2794 2795
#endif

2796 2797 2798
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

2799 2800
extern struct kobj_ns_type_operations net_ns_type_operations;

2801
extern const char *netdev_drivername(const struct net_device *dev);
2802

2803 2804
extern void linkwatch_run_queue(void);

2805 2806
static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
2807 2808 2809
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
2810 2811
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);
2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822

/* 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);
}

2823
int __netdev_update_features(struct net_device *dev);
2824
void netdev_update_features(struct net_device *dev);
2825
void netdev_change_features(struct net_device *dev);
2826

2827 2828 2829
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

2830
netdev_features_t netif_skb_features(struct sk_buff *skb);
2831

2832
static inline bool net_gso_ok(netdev_features_t features, int gso_type)
2833
{
2834
	netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
2835 2836 2837 2838 2839 2840 2841 2842 2843

	/* check flags correspondence */
	BUILD_BUG_ON(SKB_GSO_TCPV4   != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP     != (NETIF_F_UFO >> 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_TCPV6   != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_FCOE    != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));

2844
	return (features & feature) == feature;
2845 2846
}

2847
static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
2848
{
H
Herbert Xu 已提交
2849
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2850
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2851 2852
}

2853 2854
static inline bool netif_needs_gso(struct sk_buff *skb,
				   netdev_features_t features)
2855
{
2856
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2857 2858
		unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
			 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
2859 2860
}

2861 2862 2863 2864 2865 2866
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

2867 2868 2869 2870 2871
static inline bool netif_is_bond_master(struct net_device *dev)
{
	return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
}

2872
static inline bool netif_is_bond_slave(struct net_device *dev)
J
Jiri Pirko 已提交
2873 2874 2875 2876
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

2877 2878 2879 2880 2881
static inline bool netif_supports_nofcs(struct net_device *dev)
{
	return dev->priv_flags & IFF_SUPP_NOFCS;
}

2882
extern struct pernet_operations __net_initdata loopback_net_ops;
2883

2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894
/* 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->reg_state != NETREG_REGISTERED)
		return "(unregistered net_device)";
	return dev->name;
}

2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911
extern __printf(3, 4)
int netdev_printk(const char *level, const struct net_device *dev,
		  const char *format, ...);
extern __printf(2, 3)
int netdev_emerg(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_alert(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_crit(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_err(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_warn(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_notice(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_info(const struct net_device *dev, const char *format, ...);
2912

2913 2914 2915
#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

2916
#if defined(CONFIG_DYNAMIC_DEBUG)
2917 2918
#define netdev_dbg(__dev, format, args...)			\
do {								\
2919
	dynamic_netdev_dbg(__dev, format, ##args);		\
2920
} while (0)
2921 2922 2923
#elif defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
	0;							\
})
#endif

#if defined(VERBOSE_DEBUG)
#define netdev_vdbg	netdev_dbg
#else

#define netdev_vdbg(dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, dev, format, ##args);	\
	0;							\
})
#endif

/*
 * 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\n" format, netdev_name(dev), ##args);

2953 2954 2955 2956 2957 2958 2959 2960
/* netif printk helpers, similar to netdev_printk */

#define netif_printk(priv, type, level, dev, fmt, args...)	\
do {					  			\
	if (netif_msg_##type(priv))				\
		netdev_printk(level, (dev), fmt, ##args);	\
} while (0)

2961 2962 2963 2964 2965 2966
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

2967
#define netif_emerg(priv, type, dev, fmt, args...)		\
2968
	netif_level(emerg, priv, type, dev, fmt, ##args)
2969
#define netif_alert(priv, type, dev, fmt, args...)		\
2970
	netif_level(alert, priv, type, dev, fmt, ##args)
2971
#define netif_crit(priv, type, dev, fmt, args...)		\
2972
	netif_level(crit, priv, type, dev, fmt, ##args)
2973
#define netif_err(priv, type, dev, fmt, args...)		\
2974
	netif_level(err, priv, type, dev, fmt, ##args)
2975
#define netif_warn(priv, type, dev, fmt, args...)		\
2976
	netif_level(warn, priv, type, dev, fmt, ##args)
2977
#define netif_notice(priv, type, dev, fmt, args...)		\
2978
	netif_level(notice, priv, type, dev, fmt, ##args)
2979
#define netif_info(priv, type, dev, fmt, args...)		\
2980
	netif_level(info, priv, type, dev, fmt, ##args)
2981

2982
#if defined(CONFIG_DYNAMIC_DEBUG)
2983 2984 2985
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
2986
		dynamic_netdev_dbg(netdev, format, ##args);	\
2987
} while (0)
2988 2989 2990
#elif defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2991 2992 2993 2994 2995 2996 2997 2998 2999 3000
#else
#define netif_dbg(priv, type, dev, format, args...)			\
({									\
	if (0)								\
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
	0;								\
})
#endif

#if defined(VERBOSE_DEBUG)
3001
#define netif_vdbg	netif_dbg
3002 3003 3004 3005
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
3006
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3007 3008 3009
	0;							\
})
#endif
3010

3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040
/*
 *	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.
 *
 *      NOTE:  That is no longer true with the addition of VLAN tags.  Not
 *             sure which should go first, but I bet it won't make much
 *             difference if we are running VLANs.  The good news is that
 *             this protocol won't be in the list unless compiled in, so
 *             the average user (w/out VLANs) will not be adversely affected.
 *             --BLG
 *
 *		0800	IP
 *		8100    802.1Q VLAN
 *		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)

3041
#endif	/* _LINUX_NETDEVICE_H */