netdevice.h 122.6 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/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 <linux/prefetch.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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#include <uapi/linux/if_bonding.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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/* 802.15.4 specific */
struct wpan_dev;
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struct mpls_dev;
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void netdev_set_default_ethtool_ops(struct net_device *dev,
				    const struct ethtool_ops *ops);
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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);
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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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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 hrtimer		timer;
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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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void __napi_schedule(struct napi_struct *n);
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void __napi_schedule_irqoff(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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/**
 *	napi_schedule_irqoff - schedule NAPI poll
 *	@n: napi context
 *
 * Variant of napi_schedule(), assuming hard irqs are masked.
 */
static inline void napi_schedule_irqoff(struct napi_struct *n)
{
	if (napi_schedule_prep(n))
		__napi_schedule_irqoff(n);
}

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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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void __napi_complete(struct napi_struct *n);
void napi_complete_done(struct napi_struct *n, int work_done);
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/**
 *	napi_complete - NAPI processing complete
 *	@n: napi context
 *
 * Mark NAPI processing as complete.
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 * Consider using napi_complete_done() instead.
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 */
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static inline void napi_complete(struct napi_struct *n)
{
	return napi_complete_done(n, 0);
}
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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()
 */
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struct napi_struct *napi_by_id(unsigned int napi_id);
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/**
 *	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
 */
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void napi_hash_add(struct napi_struct *napi);
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/**
 *	napi_hash_del - remove a NAPI from global table
 *	@napi: napi context
 *
 * Warning: caller must observe rcu grace period
 * before freeing memory containing @napi
 */
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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.
 */
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void napi_disable(struct napi_struct *n);
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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));
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	smp_mb__before_atomic();
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	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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};
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#define QUEUE_STATE_DRV_XOFF	(1 << __QUEUE_STATE_DRV_XOFF)
#define QUEUE_STATE_STACK_XOFF	(1 << __QUEUE_STATE_STACK_XOFF)
#define QUEUE_STATE_FROZEN	(1 << __QUEUE_STATE_FROZEN)

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

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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 __rcu	*qdisc;
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	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;
578 579 580 581 582 583

	/*
	 * 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
590
	unsigned long		tx_maxrate;
591
} ____cacheline_aligned_in_smp;
592

593 594 595 596 597
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
598
	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];
};
619
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
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/*
622 623 624
 * 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;
628
	u16 filter;
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	unsigned int last_qtail;
};
631
#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) + \
642
    ((_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).
647 648 649 650 651 652
 * Each entry is a 32bit value. Upper part is the high order bits
 * of flow hash, lower part is cpu number.
 * rps_cpu_mask is used to partition the space, depending on number of
 * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
 * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f,
 * meaning we use 32-6=26 bits for the hash.
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 */
struct rps_sock_flow_table {
655
	u32	mask;
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	u32	ents[0] ____cacheline_aligned_in_smp;
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};
659
#define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
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#define RPS_NO_CPU 0xffff

663 664 665
extern u32 rps_cpu_mask;
extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;

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static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
					u32 hash)
{
	if (table && hash) {
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		unsigned int index = hash & table->mask;
		u32 val = hash & ~rps_cpu_mask;
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		/* We only give a hint, preemption can change cpu under us */
674
		val |= raw_smp_processor_id();
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676 677
		if (table->ents[index] != val)
			table->ents[index] = val;
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	}
}

681
#ifdef CONFIG_RFS_ACCEL
682 683
bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
			 u16 filter_id);
684
#endif
685
#endif /* CONFIG_RPS */
686

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/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
689
#ifdef CONFIG_RPS
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	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
692
#endif
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	struct kobject			kobj;
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	struct net_device		*dev;
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} ____cacheline_aligned_in_smp;
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/*
 * RX queue sysfs structures and functions.
 */
struct rx_queue_attribute {
	struct attribute attr;
	ssize_t (*show)(struct netdev_rx_queue *queue,
	    struct rx_queue_attribute *attr, char *buf);
	ssize_t (*store)(struct netdev_rx_queue *queue,
	    struct rx_queue_attribute *attr, const char *buf, size_t len);
};
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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 */

734 735 736 737 738 739 740 741
#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;
};

742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
#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

759
#define MAX_PHYS_ITEM_ID_LEN 32
760

761 762
/* This structure holds a unique identifier to identify some
 * physical item (port for example) used by a netdevice.
763
 */
764 765
struct netdev_phys_item_id {
	unsigned char id[MAX_PHYS_ITEM_ID_LEN];
766 767 768
	unsigned char id_len;
};

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

776 777 778
typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
				       struct sk_buff *skb);

779 780
/*
 * This structure defines the management hooks for network devices.
781 782
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801
 *
 * 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.
 *
802 803
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
804
 *	Called when a packet needs to be transmitted.
805 806 807 808
 *	Returns NETDEV_TX_OK.  Can return NETDEV_TX_BUSY, but you should stop
 *	the queue before that can happen; it's for obsolete devices and weird
 *	corner cases, but the stack really does a non-trivial amount
 *	of useless work if you return NETDEV_TX_BUSY.
809
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
810 811
 *	Required can not be NULL.
 *
812
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
813
 *                         void *accel_priv, select_queue_fallback_t fallback);
814 815 816
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
817 818 819 820 821 822
 * 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.
823 824
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
825 826 827
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
828
 *	needs to be changed. If this interface is not defined, the
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848
 *	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.
 *
849
 * void (*ndo_tx_timeout)(struct net_device *dev);
850 851 852
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
853
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
854
 *                      struct rtnl_link_stats64 *storage);
855
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
856
 *	Called when a user wants to get the network device usage
857
 *	statistics. Drivers must do one of the following:
858 859
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
860
 *	2. Define @ndo_get_stats to update a net_device_stats structure
861 862 863 864 865
 *	   (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.
866
 *
867
 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
868 869
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is registered.
870
 *
871
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
872 873
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is unregistered.
874 875
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
876 877 878 879
 *
 *	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);
880 881
 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
 *			  int max_tx_rate);
882
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
883 884
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
885
 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
886 887
 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
 *			  struct nlattr *port[]);
888 889 890 891 892
 *
 *      Enable or disable the VF ability to query its RSS Redirection Table and
 *      Hash Key. This is needed since on some devices VF share this information
 *      with PF and querying it may adduce a theoretical security risk.
 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
893
 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
894 895 896 897 898
 * 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.
899
 *
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
 *	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.
 *
930 931 932 933 934 935 936
 * 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.
 *
937 938 939 940 941 942
 * 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.
 *
943 944 945 946 947 948
 *	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.
949
 *
950
 *	Slave management functions (for bridge, bonding, etc).
951 952 953 954 955
 * 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.
956 957
 *
 *      Feature/offload setting functions.
958 959
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
960 961 962 963
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
964
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
965 966 967 968
 *	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.
 *
969 970
 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
971
 *		      const unsigned char *addr, u16 vid, u16 flags)
972
 *	Adds an FDB entry to dev for addr.
973 974
 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
975
 *		      const unsigned char *addr, u16 vid)
976 977
 *	Deletes the FDB entry from dev coresponding to addr.
 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
978 979
 *		       struct net_device *dev, struct net_device *filter_dev,
 *		       int idx)
980 981
 *	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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 *
983 984
 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
 *			     u16 flags)
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 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
986 987
 *			     struct net_device *dev, u32 filter_mask,
 *			     int nlflags)
988 989
 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
 *			     u16 flags);
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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.
998 999
 *
 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1000
 *			       struct netdev_phys_item_id *ppid);
1001 1002 1003
 *	Called to get ID of physical port of this device. If driver does
 *	not implement this, it is assumed that the hw is not able to have
 *	multiple net devices on single physical port.
1004 1005
 *
 * void (*ndo_add_vxlan_port)(struct  net_device *dev,
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 *			      sa_family_t sa_family, __be16 port);
1007 1008 1009 1010 1011 1012
 *	Called by vxlan to notiy a driver about the UDP port and socket
 *	address family that vxlan is listnening to. It is called only when
 *	a new port starts listening. The operation is protected by the
 *	vxlan_net->sock_lock.
 *
 * void (*ndo_del_vxlan_port)(struct  net_device *dev,
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 *			      sa_family_t sa_family, __be16 port);
1014 1015 1016
 *	Called by vxlan to notify the driver about a UDP port and socket
 *	address family that vxlan is not listening to anymore. The operation
 *	is protected by the vxlan_net->sock_lock.
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035
 *
 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
 *				 struct net_device *dev)
 *	Called by upper layer devices to accelerate switching or other
 *	station functionality into hardware. 'pdev is the lowerdev
 *	to use for the offload and 'dev' is the net device that will
 *	back the offload. Returns a pointer to the private structure
 *	the upper layer will maintain.
 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
 *	Called by upper layer device to delete the station created
 *	by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
 *	the station and priv is the structure returned by the add
 *	operation.
 * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb,
 *				      struct net_device *dev,
 *				      void *priv);
 *	Callback to use for xmit over the accelerated station. This
 *	is used in place of ndo_start_xmit on accelerated net
 *	devices.
1036 1037 1038
 * netdev_features_t (*ndo_features_check) (struct sk_buff *skb,
 *					    struct net_device *dev
 *					    netdev_features_t features);
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 *	Called by core transmit path to determine if device is capable of
1040 1041 1042 1043 1044
 *	performing offload operations on a given packet. This is to give
 *	the device an opportunity to implement any restrictions that cannot
 *	be otherwise expressed by feature flags. The check is called with
 *	the set of features that the stack has calculated and it returns
 *	those the driver believes to be appropriate.
1045 1046 1047 1048
 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
 *			     int queue_index, u32 maxrate);
 *	Called when a user wants to set a max-rate limitation of specific
 *	TX queue.
1049 1050
 * int (*ndo_get_iflink)(const struct net_device *dev);
 *	Called to get the iflink value of this device.
1051 1052 1053 1054 1055 1056
 * void (*ndo_change_proto_down)(struct net_device *dev,
 *				  bool proto_down);
 *	This function is used to pass protocol port error state information
 *	to the switch driver. The switch driver can react to the proto_down
 *      by doing a phys down on the associated switch port.
 *
1057 1058 1059 1060 1061 1062
 */
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);
1063
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
1064 1065
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
1066
						    struct sk_buff *skb,
1067 1068
						    void *accel_priv,
						    select_queue_fallback_t fallback);
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
	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);
1079 1080 1081 1082
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
1083 1084
	void			(*ndo_tx_timeout) (struct net_device *dev);

1085 1086
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
1087 1088
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

1089
	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
1090
						       __be16 proto, u16 vid);
1091
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1092
						        __be16 proto, u16 vid);
1093 1094
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
H
Herbert Xu 已提交
1095
	int			(*ndo_netpoll_setup)(struct net_device *dev,
1096
						     struct netpoll_info *info);
1097
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
E
Eliezer Tamir 已提交
1098
#endif
1099
#ifdef CONFIG_NET_RX_BUSY_POLL
1100
	int			(*ndo_busy_poll)(struct napi_struct *dev);
1101
#endif
1102 1103 1104 1105
	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);
1106 1107 1108
	int			(*ndo_set_vf_rate)(struct net_device *dev,
						   int vf, int min_tx_rate,
						   int max_tx_rate);
1109 1110
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
1111 1112 1113
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
1114 1115
	int			(*ndo_set_vf_link_state)(struct net_device *dev,
							 int vf, int link_state);
1116 1117 1118 1119
	int			(*ndo_get_vf_stats)(struct net_device *dev,
						    int vf,
						    struct ifla_vf_stats
						    *vf_stats);
1120 1121 1122 1123 1124
	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);
1125 1126 1127
	int			(*ndo_set_vf_rss_query_en)(
						   struct net_device *dev,
						   int vf, bool setting);
1128
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
1129
#if IS_ENABLED(CONFIG_FCOE)
1130 1131
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
1132 1133 1134 1135 1136 1137
	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);
1138 1139 1140 1141
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
1142 1143
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
1144 1145
#endif

1146
#if IS_ENABLED(CONFIG_LIBFCOE)
1147 1148 1149 1150
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
1151
#endif
1152

1153 1154 1155 1156 1157 1158
#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
1159 1160 1161 1162
	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);
1163 1164
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
1165
	int			(*ndo_set_features)(struct net_device *dev,
1166
						    netdev_features_t features);
1167
	int			(*ndo_neigh_construct)(struct neighbour *n);
1168
	void			(*ndo_neigh_destroy)(struct neighbour *n);
1169 1170

	int			(*ndo_fdb_add)(struct ndmsg *ndm,
1171
					       struct nlattr *tb[],
1172
					       struct net_device *dev,
1173
					       const unsigned char *addr,
1174
					       u16 vid,
1175 1176
					       u16 flags);
	int			(*ndo_fdb_del)(struct ndmsg *ndm,
1177
					       struct nlattr *tb[],
1178
					       struct net_device *dev,
1179 1180
					       const unsigned char *addr,
					       u16 vid);
1181 1182 1183
	int			(*ndo_fdb_dump)(struct sk_buff *skb,
						struct netlink_callback *cb,
						struct net_device *dev,
1184
						struct net_device *filter_dev,
1185
						int idx);
J
John Fastabend 已提交
1186 1187

	int			(*ndo_bridge_setlink)(struct net_device *dev,
1188 1189
						      struct nlmsghdr *nlh,
						      u16 flags);
J
John Fastabend 已提交
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	int			(*ndo_bridge_getlink)(struct sk_buff *skb,
						      u32 pid, u32 seq,
1192
						      struct net_device *dev,
1193 1194
						      u32 filter_mask,
						      int nlflags);
1195
	int			(*ndo_bridge_dellink)(struct net_device *dev,
1196 1197
						      struct nlmsghdr *nlh,
						      u16 flags);
J
Jiri Pirko 已提交
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	int			(*ndo_change_carrier)(struct net_device *dev,
						      bool new_carrier);
1200
	int			(*ndo_get_phys_port_id)(struct net_device *dev,
1201
							struct netdev_phys_item_id *ppid);
1202 1203
	int			(*ndo_get_phys_port_name)(struct net_device *dev,
							  char *name, size_t len);
1204 1205
	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1206
						      __be16 port);
1207 1208
	void			(*ndo_del_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1209
						      __be16 port);
1210 1211 1212 1213 1214 1215 1216 1217 1218

	void*			(*ndo_dfwd_add_station)(struct net_device *pdev,
							struct net_device *dev);
	void			(*ndo_dfwd_del_station)(struct net_device *pdev,
							void *priv);

	netdev_tx_t		(*ndo_dfwd_start_xmit) (struct sk_buff *skb,
							struct net_device *dev,
							void *priv);
1219
	int			(*ndo_get_lock_subclass)(struct net_device *dev);
1220 1221 1222
	netdev_features_t	(*ndo_features_check) (struct sk_buff *skb,
						       struct net_device *dev,
						       netdev_features_t features);
1223 1224 1225
	int			(*ndo_set_tx_maxrate)(struct net_device *dev,
						      int queue_index,
						      u32 maxrate);
1226
	int			(*ndo_get_iflink)(const struct net_device *dev);
1227 1228
	int			(*ndo_change_proto_down)(struct net_device *dev,
							 bool proto_down);
1229 1230
};

1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
/**
 * enum net_device_priv_flags - &struct net_device priv_flags
 *
 * These are the &struct net_device, they are only set internally
 * by drivers and used in the kernel. These flags are invisible to
 * userspace, this means that the order of these flags can change
 * during any kernel release.
 *
 * You should have a pretty good reason to be extending these flags.
 *
 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
 * @IFF_EBRIDGE: Ethernet bridging device
 * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active
 * @IFF_MASTER_8023AD: bonding master, 802.3ad
 * @IFF_MASTER_ALB: bonding master, balance-alb
 * @IFF_BONDING: bonding master or slave
 * @IFF_SLAVE_NEEDARP: need ARPs for validation
 * @IFF_ISATAP: ISATAP interface (RFC4214)
 * @IFF_MASTER_ARPMON: bonding master, ARP mon in use
 * @IFF_WAN_HDLC: WAN HDLC device
 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
 *	release skb->dst
 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
 * @IFF_MACVLAN_PORT: device used as macvlan port
 * @IFF_BRIDGE_PORT: device used as bridge port
 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
 * @IFF_UNICAST_FLT: Supports unicast filtering
 * @IFF_TEAM_PORT: device used as team port
 * @IFF_SUPP_NOFCS: device supports sending custom FCS
 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
 *	change when it's running
 * @IFF_MACVLAN: Macvlan device
1265
 * @IFF_NO_QUEUE: device can run without qdisc attached
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289
 */
enum netdev_priv_flags {
	IFF_802_1Q_VLAN			= 1<<0,
	IFF_EBRIDGE			= 1<<1,
	IFF_SLAVE_INACTIVE		= 1<<2,
	IFF_MASTER_8023AD		= 1<<3,
	IFF_MASTER_ALB			= 1<<4,
	IFF_BONDING			= 1<<5,
	IFF_SLAVE_NEEDARP		= 1<<6,
	IFF_ISATAP			= 1<<7,
	IFF_MASTER_ARPMON		= 1<<8,
	IFF_WAN_HDLC			= 1<<9,
	IFF_XMIT_DST_RELEASE		= 1<<10,
	IFF_DONT_BRIDGE			= 1<<11,
	IFF_DISABLE_NETPOLL		= 1<<12,
	IFF_MACVLAN_PORT		= 1<<13,
	IFF_BRIDGE_PORT			= 1<<14,
	IFF_OVS_DATAPATH		= 1<<15,
	IFF_TX_SKB_SHARING		= 1<<16,
	IFF_UNICAST_FLT			= 1<<17,
	IFF_TEAM_PORT			= 1<<18,
	IFF_SUPP_NOFCS			= 1<<19,
	IFF_LIVE_ADDR_CHANGE		= 1<<20,
	IFF_MACVLAN			= 1<<21,
1290
	IFF_XMIT_DST_RELEASE_PERM	= 1<<22,
1291 1292
	IFF_IPVLAN_MASTER		= 1<<23,
	IFF_IPVLAN_SLAVE		= 1<<24,
1293
	IFF_VRF_MASTER			= 1<<25,
1294
	IFF_NO_QUEUE			= 1<<26,
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};

#define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
#define IFF_EBRIDGE			IFF_EBRIDGE
#define IFF_SLAVE_INACTIVE		IFF_SLAVE_INACTIVE
#define IFF_MASTER_8023AD		IFF_MASTER_8023AD
#define IFF_MASTER_ALB			IFF_MASTER_ALB
#define IFF_BONDING			IFF_BONDING
#define IFF_SLAVE_NEEDARP		IFF_SLAVE_NEEDARP
#define IFF_ISATAP			IFF_ISATAP
#define IFF_MASTER_ARPMON		IFF_MASTER_ARPMON
#define IFF_WAN_HDLC			IFF_WAN_HDLC
#define IFF_XMIT_DST_RELEASE		IFF_XMIT_DST_RELEASE
#define IFF_DONT_BRIDGE			IFF_DONT_BRIDGE
#define IFF_DISABLE_NETPOLL		IFF_DISABLE_NETPOLL
#define IFF_MACVLAN_PORT		IFF_MACVLAN_PORT
#define IFF_BRIDGE_PORT			IFF_BRIDGE_PORT
#define IFF_OVS_DATAPATH		IFF_OVS_DATAPATH
#define IFF_TX_SKB_SHARING		IFF_TX_SKB_SHARING
#define IFF_UNICAST_FLT			IFF_UNICAST_FLT
#define IFF_TEAM_PORT			IFF_TEAM_PORT
#define IFF_SUPP_NOFCS			IFF_SUPP_NOFCS
#define IFF_LIVE_ADDR_CHANGE		IFF_LIVE_ADDR_CHANGE
#define IFF_MACVLAN			IFF_MACVLAN
1319
#define IFF_XMIT_DST_RELEASE_PERM	IFF_XMIT_DST_RELEASE_PERM
1320 1321
#define IFF_IPVLAN_MASTER		IFF_IPVLAN_MASTER
#define IFF_IPVLAN_SLAVE		IFF_IPVLAN_SLAVE
1322
#define IFF_VRF_MASTER			IFF_VRF_MASTER
1323
#define IFF_NO_QUEUE			IFF_NO_QUEUE
1324

1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
/**
 *	struct net_device - The DEVICE structure.
 *		Actually, this whole structure is a big mistake.  It mixes I/O
 *		data with strictly "high-level" data, and it has to know about
 *		almost every data structure used in the INET module.
 *
 *	@name:	This is the first field of the "visible" part of this structure
 *		(i.e. as seen by users in the "Space.c" file).  It is the name
 *	 	of the interface.
 *
 *	@name_hlist: 	Device name hash chain, please keep it close to name[]
 *	@ifalias:	SNMP alias
 *	@mem_end:	Shared memory end
 *	@mem_start:	Shared memory start
 *	@base_addr:	Device I/O address
 *	@irq:		Device IRQ number
 *
1342 1343
 *	@carrier_changes:	Stats to monitor carrier on<->off transitions
 *
1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
 *	@state:		Generic network queuing layer state, see netdev_state_t
 *	@dev_list:	The global list of network devices
 *	@napi_list:	List entry, that is used for polling napi devices
 *	@unreg_list:	List entry, that is used, when we are unregistering the
 *			device, see the function unregister_netdev
 *	@close_list:	List entry, that is used, when we are closing the device
 *
 *	@adj_list:	Directly linked devices, like slaves for bonding
 *	@all_adj_list:	All linked devices, *including* neighbours
 *	@features:	Currently active device features
 *	@hw_features:	User-changeable features
 *
 *	@wanted_features:	User-requested features
 *	@vlan_features:		Mask of features inheritable by VLAN devices
 *
 *	@hw_enc_features:	Mask of features inherited by encapsulating devices
 *				This field indicates what encapsulation
 *				offloads the hardware is capable of doing,
 *				and drivers will need to set them appropriately.
 *
 *	@mpls_features:	Mask of features inheritable by MPLS
 *
 *	@ifindex:	interface index
1367
 *	@group:		The group, that the device belongs to
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
 *
 *	@stats:		Statistics struct, which was left as a legacy, use
 *			rtnl_link_stats64 instead
 *
 *	@rx_dropped:	Dropped packets by core network,
 *			do not use this in drivers
 *	@tx_dropped:	Dropped packets by core network,
 *			do not use this in drivers
 *
 *	@wireless_handlers:	List of functions to handle Wireless Extensions,
 *				instead of ioctl,
 *				see <net/iw_handler.h> for details.
 *	@wireless_data:	Instance data managed by the core of wireless extensions
 *
 *	@netdev_ops:	Includes several pointers to callbacks,
 *			if one wants to override the ndo_*() functions
 *	@ethtool_ops:	Management operations
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Eric W. Biederman 已提交
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 *	@header_ops:	Includes callbacks for creating,parsing,caching,etc
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
 *			of Layer 2 headers.
 *
 *	@flags:		Interface flags (a la BSD)
 *	@priv_flags:	Like 'flags' but invisible to userspace,
 *			see if.h for the definitions
 *	@gflags:	Global flags ( kept as legacy )
 *	@padded:	How much padding added by alloc_netdev()
 *	@operstate:	RFC2863 operstate
 *	@link_mode:	Mapping policy to operstate
 *	@if_port:	Selectable AUI, TP, ...
 *	@dma:		DMA channel
 *	@mtu:		Interface MTU value
 *	@type:		Interface hardware type
 *	@hard_header_len: Hardware header length
 *
 *	@needed_headroom: Extra headroom the hardware may need, but not in all
 *			  cases can this be guaranteed
 *	@needed_tailroom: Extra tailroom the hardware may need, but not in all
 *			  cases can this be guaranteed. Some cases also use
 *			  LL_MAX_HEADER instead to allocate the skb
 *
 *	interface address info:
 *
 * 	@perm_addr:		Permanent hw address
 * 	@addr_assign_type:	Hw address assignment type
 * 	@addr_len:		Hardware address length
 * 	@neigh_priv_len;	Used in neigh_alloc(),
 * 				initialized only in atm/clip.c
 * 	@dev_id:		Used to differentiate devices that share
 * 				the same link layer address
 * 	@dev_port:		Used to differentiate devices that share
 * 				the same function
 *	@addr_list_lock:	XXX: need comments on this one
 *	@uc_promisc:		Counter, that indicates, that promiscuous mode
 *				has been enabled due to the need to listen to
 *				additional unicast addresses in a device that
 *				does not implement ndo_set_rx_mode()
1423 1424 1425 1426
 *	@uc:			unicast mac addresses
 *	@mc:			multicast mac addresses
 *	@dev_addrs:		list of device hw addresses
 *	@queues_kset:		Group of all Kobjects in the Tx and RX queues
1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
 *	@promiscuity:		Number of times, the NIC is told to work in
 *				Promiscuous mode, if it becomes 0 the NIC will
 *				exit from working in Promiscuous mode
 *	@allmulti:		Counter, enables or disables allmulticast mode
 *
 *	@vlan_info:	VLAN info
 *	@dsa_ptr:	dsa specific data
 *	@tipc_ptr:	TIPC specific data
 *	@atalk_ptr:	AppleTalk link
 *	@ip_ptr:	IPv4 specific data
 *	@dn_ptr:	DECnet specific data
 *	@ip6_ptr:	IPv6 specific data
 *	@ax25_ptr:	AX.25 specific data
1440
 *	@vrf_ptr:	VRF specific data
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456
 *	@ieee80211_ptr:	IEEE 802.11 specific data, assign before registering
 *
 *	@last_rx:	Time of last Rx
 *	@dev_addr:	Hw address (before bcast,
 *			because most packets are unicast)
 *
 *	@_rx:			Array of RX queues
 *	@num_rx_queues:		Number of RX queues
 *				allocated at register_netdev() time
 *	@real_num_rx_queues: 	Number of RX queues currently active in device
 *
 *	@rx_handler:		handler for received packets
 *	@rx_handler_data: 	XXX: need comments on this one
 *	@ingress_queue:		XXX: need comments on this one
 *	@broadcast:		hw bcast address
 *
1457 1458 1459 1460 1461 1462
 *	@rx_cpu_rmap:	CPU reverse-mapping for RX completion interrupts,
 *			indexed by RX queue number. Assigned by driver.
 *			This must only be set if the ndo_rx_flow_steer
 *			operation is defined
 *	@index_hlist:		Device index hash chain
 *
1463 1464 1465 1466 1467 1468 1469 1470 1471
 *	@_tx:			Array of TX queues
 *	@num_tx_queues:		Number of TX queues allocated at alloc_netdev_mq() time
 *	@real_num_tx_queues: 	Number of TX queues currently active in device
 *	@qdisc:			Root qdisc from userspace point of view
 *	@tx_queue_len:		Max frames per queue allowed
 *	@tx_global_lock: 	XXX: need comments on this one
 *
 *	@xps_maps:	XXX: need comments on this one
 *
1472 1473
 *	@offload_fwd_mark:	Offload device fwding mark
 *
1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511
 *	@trans_start:		Time (in jiffies) of last Tx
 *	@watchdog_timeo:	Represents the timeout that is used by
 *				the watchdog ( see dev_watchdog() )
 *	@watchdog_timer:	List of timers
 *
 *	@pcpu_refcnt:		Number of references to this device
 *	@todo_list:		Delayed register/unregister
 *	@link_watch_list:	XXX: need comments on this one
 *
 *	@reg_state:		Register/unregister state machine
 *	@dismantle:		Device is going to be freed
 *	@rtnl_link_state:	This enum represents the phases of creating
 *				a new link
 *
 *	@destructor:		Called from unregister,
 *				can be used to call free_netdev
 *	@npinfo:		XXX: need comments on this one
 * 	@nd_net:		Network namespace this network device is inside
 *
 * 	@ml_priv:	Mid-layer private
 * 	@lstats:	Loopback statistics
 * 	@tstats:	Tunnel statistics
 * 	@dstats:	Dummy statistics
 * 	@vstats:	Virtual ethernet statistics
 *
 *	@garp_port:	GARP
 *	@mrp_port:	MRP
 *
 *	@dev:		Class/net/name entry
 *	@sysfs_groups:	Space for optional device, statistics and wireless
 *			sysfs groups
 *
 *	@sysfs_rx_queue_group:	Space for optional per-rx queue attributes
 *	@rtnl_link_ops:	Rtnl_link_ops
 *
 *	@gso_max_size:	Maximum size of generic segmentation offload
 *	@gso_max_segs:	Maximum number of segments that can be passed to the
 *			NIC for GSO
1512 1513
 *	@gso_min_segs:	Minimum number of segments that can be passed to the
 *			NIC for GSO
1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527
 *
 *	@dcbnl_ops:	Data Center Bridging netlink ops
 *	@num_tc:	Number of traffic classes in the net device
 *	@tc_to_txq:	XXX: need comments on this one
 *	@prio_tc_map	XXX: need comments on this one
 *
 *	@fcoe_ddp_xid:	Max exchange id for FCoE LRO by ddp
 *
 *	@priomap:	XXX: need comments on this one
 *	@phydev:	Physical device may attach itself
 *			for hardware timestamping
 *
 *	@qdisc_tx_busylock:	XXX: need comments on this one
 *
1528 1529 1530 1531
 *	@proto_down:	protocol port state information can be sent to the
 *			switch driver and used to set the phys state of the
 *			switch port.
 *
L
Linus Torvalds 已提交
1532 1533 1534 1535
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

E
Eric Dumazet 已提交
1536
struct net_device {
L
Linus Torvalds 已提交
1537
	char			name[IFNAMSIZ];
1538
	struct hlist_node	name_hlist;
1539
	char 			*ifalias;
L
Linus Torvalds 已提交
1540 1541 1542 1543
	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
1544 1545 1546 1547
	unsigned long		mem_end;
	unsigned long		mem_start;
	unsigned long		base_addr;
	int			irq;
L
Linus Torvalds 已提交
1548

1549 1550
	atomic_t		carrier_changes;

L
Linus Torvalds 已提交
1551
	/*
1552 1553
	 *	Some hardware also needs these fields (state,dev_list,
	 *	napi_list,unreg_list,close_list) but they are not
L
Linus Torvalds 已提交
1554 1555 1556 1557 1558
	 *	part of the usual set specified in Space.c.
	 */

	unsigned long		state;

1559
	struct list_head	dev_list;
1560
	struct list_head	napi_list;
1561
	struct list_head	unreg_list;
1562
	struct list_head	close_list;
1563 1564
	struct list_head	ptype_all;
	struct list_head	ptype_specific;
1565 1566 1567 1568 1569 1570 1571 1572 1573 1574

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

	struct {
		struct list_head upper;
		struct list_head lower;
	} all_adj_list;
1575

1576 1577 1578 1579
	netdev_features_t	features;
	netdev_features_t	hw_features;
	netdev_features_t	wanted_features;
	netdev_features_t	vlan_features;
1580
	netdev_features_t	hw_enc_features;
S
Simon Horman 已提交
1581
	netdev_features_t	mpls_features;
1582

L
Linus Torvalds 已提交
1583
	int			ifindex;
1584
	int			group;
L
Linus Torvalds 已提交
1585

R
Rusty Russell 已提交
1586
	struct net_device_stats	stats;
1587 1588 1589

	atomic_long_t		rx_dropped;
	atomic_long_t		tx_dropped;
L
Linus Torvalds 已提交
1590

1591
#ifdef CONFIG_WIRELESS_EXT
L
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1592 1593
	const struct iw_handler_def *	wireless_handlers;
	struct iw_public_data *	wireless_data;
1594
#endif
1595
	const struct net_device_ops *netdev_ops;
1596
	const struct ethtool_ops *ethtool_ops;
S
Scott Feldman 已提交
1597
#ifdef CONFIG_NET_SWITCHDEV
J
Jiri Pirko 已提交
1598
	const struct switchdev_ops *switchdev_ops;
S
Scott Feldman 已提交
1599
#endif
L
Linus Torvalds 已提交
1600

1601 1602
	const struct header_ops *header_ops;

1603 1604 1605
	unsigned int		flags;
	unsigned int		priv_flags;

L
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1606
	unsigned short		gflags;
1607
	unsigned short		padded;
L
Linus Torvalds 已提交
1608

1609 1610
	unsigned char		operstate;
	unsigned char		link_mode;
S
Stefan Rompf 已提交
1611

1612 1613
	unsigned char		if_port;
	unsigned char		dma;
1614

1615 1616 1617
	unsigned int		mtu;
	unsigned short		type;
	unsigned short		hard_header_len;
L
Linus Torvalds 已提交
1618

1619 1620 1621
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

L
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1622
	/* Interface address info. */
1623 1624 1625
	unsigned char		perm_addr[MAX_ADDR_LEN];
	unsigned char		addr_assign_type;
	unsigned char		addr_len;
1626
	unsigned short		neigh_priv_len;
1627 1628
	unsigned short          dev_id;
	unsigned short          dev_port;
J
Jiri Pirko 已提交
1629
	spinlock_t		addr_list_lock;
1630 1631
	unsigned char		name_assign_type;
	bool			uc_promisc;
1632 1633 1634 1635
	struct netdev_hw_addr_list	uc;
	struct netdev_hw_addr_list	mc;
	struct netdev_hw_addr_list	dev_addrs;

1636 1637 1638
#ifdef CONFIG_SYSFS
	struct kset		*queues_kset;
#endif
1639 1640
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
1641 1642 1643


	/* Protocol specific pointers */
1644

1645
#if IS_ENABLED(CONFIG_VLAN_8021Q)
1646
	struct vlan_info __rcu	*vlan_info;
1647
#endif
1648
#if IS_ENABLED(CONFIG_NET_DSA)
1649
	struct dsa_switch_tree	*dsa_ptr;
1650 1651
#endif
#if IS_ENABLED(CONFIG_TIPC)
1652
	struct tipc_bearer __rcu *tipc_ptr;
1653
#endif
1654 1655 1656 1657 1658
	void 			*atalk_ptr;
	struct in_device __rcu	*ip_ptr;
	struct dn_dev __rcu     *dn_ptr;
	struct inet6_dev __rcu	*ip6_ptr;
	void			*ax25_ptr;
1659
	struct net_vrf_dev __rcu *vrf_ptr;
1660
	struct wireless_dev	*ieee80211_ptr;
1661
	struct wpan_dev		*ieee802154_ptr;
R
Robert Shearman 已提交
1662 1663 1664
#if IS_ENABLED(CONFIG_MPLS_ROUTING)
	struct mpls_dev __rcu	*mpls_ptr;
#endif
L
Linus Torvalds 已提交
1665

1666
/*
E
Eric Dumazet 已提交
1667
 * Cache lines mostly used on receive path (including eth_type_trans())
1668
 */
1669
	unsigned long		last_rx;
1670

1671
	/* Interface address info used in eth_type_trans() */
1672
	unsigned char		*dev_addr;
1673

T
Tom Herbert 已提交
1674

1675
#ifdef CONFIG_SYSFS
T
Tom Herbert 已提交
1676 1677 1678
	struct netdev_rx_queue	*_rx;

	unsigned int		num_rx_queues;
1679
	unsigned int		real_num_rx_queues;
1680

E
Eric Dumazet 已提交
1681
#endif
T
Tom Herbert 已提交
1682

1683
	unsigned long		gro_flush_timeout;
1684 1685
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1686

1687
#ifdef CONFIG_NET_CLS_ACT
1688 1689
	struct tcf_proto __rcu  *ingress_cl_list;
#endif
1690
	struct netdev_queue __rcu *ingress_queue;
1691 1692 1693
#ifdef CONFIG_NETFILTER_INGRESS
	struct list_head	nf_hooks_ingress;
#endif
1694

1695
	unsigned char		broadcast[MAX_ADDR_LEN];
1696 1697 1698 1699
#ifdef CONFIG_RFS_ACCEL
	struct cpu_rmap		*rx_cpu_rmap;
#endif
	struct hlist_node	index_hlist;
E
Eric Dumazet 已提交
1700 1701 1702 1703

/*
 * Cache lines mostly used on transmit path
 */
1704 1705
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
	unsigned int		num_tx_queues;
1706
	unsigned int		real_num_tx_queues;
1707
	struct Qdisc		*qdisc;
1708
	unsigned long		tx_queue_len;
1709
	spinlock_t		tx_global_lock;
1710
	int			watchdog_timeo;
E
Eric Dumazet 已提交
1711

T
Tom Herbert 已提交
1712
#ifdef CONFIG_XPS
E
Eric Dumazet 已提交
1713
	struct xps_dev_maps __rcu *xps_maps;
T
Tom Herbert 已提交
1714
#endif
T
Tom Herbert 已提交
1715

1716 1717 1718 1719
#ifdef CONFIG_NET_SWITCHDEV
	u32			offload_fwd_mark;
#endif

1720
	/* These may be needed for future network-power-down code. */
1721 1722 1723 1724 1725

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1726
	unsigned long		trans_start;
1727 1728 1729

	struct timer_list	watchdog_timer;

E
Eric Dumazet 已提交
1730
	int __percpu		*pcpu_refcnt;
L
Linus Torvalds 已提交
1731 1732
	struct list_head	todo_list;

1733
	struct list_head	link_watch_list;
1734

L
Linus Torvalds 已提交
1735
	enum { NETREG_UNINITIALIZED=0,
1736
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
1737 1738 1739
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1740
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1741 1742
	} reg_state:8;

1743
	bool dismantle;
1744 1745 1746 1747 1748

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
L
Linus Torvalds 已提交
1749

1750
	void (*destructor)(struct net_device *dev);
L
Linus Torvalds 已提交
1751 1752

#ifdef CONFIG_NETPOLL
1753
	struct netpoll_info __rcu	*npinfo;
L
Linus Torvalds 已提交
1754
#endif
1755

1756
	possible_net_t			nd_net;
1757

D
David S. Miller 已提交
1758
	/* mid-layer private */
E
Eric Dumazet 已提交
1759
	union {
1760 1761
		void					*ml_priv;
		struct pcpu_lstats __percpu		*lstats;
1762
		struct pcpu_sw_netstats __percpu	*tstats;
1763 1764
		struct pcpu_dstats __percpu		*dstats;
		struct pcpu_vstats __percpu		*vstats;
E
Eric Dumazet 已提交
1765
	};
1766

E
Eric Dumazet 已提交
1767
	struct garp_port __rcu	*garp_port;
1768
	struct mrp_port __rcu	*mrp_port;
L
Linus Torvalds 已提交
1769

1770
	struct device	dev;
1771
	const struct attribute_group *sysfs_groups[4];
1772
	const struct attribute_group *sysfs_rx_queue_group;
P
Patrick McHardy 已提交
1773 1774

	const struct rtnl_link_ops *rtnl_link_ops;
1775

1776 1777 1778
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1779 1780
#define GSO_MAX_SEGS		65535
	u16			gso_max_segs;
1781
	u16			gso_min_segs;
J
Jeff Kirsher 已提交
1782
#ifdef CONFIG_DCB
1783
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1784
#endif
1785 1786 1787
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1788

1789
#if IS_ENABLED(CONFIG_FCOE)
1790
	unsigned int		fcoe_ddp_xid;
1791
#endif
1792
#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1793
	struct netprio_map __rcu *priomap;
1794
#endif
1795
	struct phy_device *phydev;
1796
	struct lock_class_key *qdisc_tx_busylock;
1797
	bool proto_down;
L
Linus Torvalds 已提交
1798
};
1799
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
1800 1801 1802

#define	NETDEV_ALIGN		32

1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853
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;
}

1854 1855 1856 1857 1858 1859 1860
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	return &dev->_tx[index];
}

1861 1862 1863 1864 1865 1866
static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
						    const struct sk_buff *skb)
{
	return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
}

1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878
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);
}

1879
struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1880 1881
				    struct sk_buff *skb,
				    void *accel_priv);
1882

1883 1884 1885 1886 1887 1888
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1889
	return read_pnet(&dev->nd_net);
1890 1891 1892
}

static inline
1893
void dev_net_set(struct net_device *dev, struct net *net)
1894
{
1895
	write_pnet(&dev->nd_net, net);
1896 1897
}

1898
static inline bool netdev_uses_dsa(struct net_device *dev)
1899
{
1900
#if IS_ENABLED(CONFIG_NET_DSA)
1901 1902
	if (dev->dsa_ptr != NULL)
		return dsa_uses_tagged_protocol(dev->dsa_ptr);
1903
#endif
1904
	return false;
1905 1906
}

1907 1908 1909 1910 1911 1912
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1913
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
1914
{
1915
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
L
Linus Torvalds 已提交
1916 1917 1918 1919 1920
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1921
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
1922

1923
/* Set the sysfs device type for the network logical device to allow
1924
 * fine-grained identification of different network device types. For
1925 1926 1927 1928
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

E
Eric Dumazet 已提交
1929 1930 1931 1932 1933
/* Default NAPI poll() weight
 * Device drivers are strongly advised to not use bigger value
 */
#define NAPI_POLL_WEIGHT 64

1934 1935 1936 1937 1938 1939 1940 1941 1942 1943
/**
 *	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.
 */
1944 1945
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1946

1947 1948 1949 1950 1951 1952
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1953 1954 1955
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1956 1957 1958
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1959 1960 1961
	/* Length of frag0. */
	unsigned int frag0_len;

1962 1963 1964
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1965
	/* This is non-zero if the packet cannot be merged with the new skb. */
1966 1967 1968 1969
	u16	flush;

	/* Save the IP ID here and check when we get to the transport layer */
	u16	flush_id;
1970 1971

	/* Number of segments aggregated. */
1972 1973
	u16	count;

1974 1975 1976
	/* Start offset for remote checksum offload */
	u16	gro_remcsum_start;

1977 1978
	/* jiffies when first packet was created/queued */
	unsigned long age;
1979

T
Tom Herbert 已提交
1980
	/* Used in ipv6_gro_receive() and foo-over-udp */
1981 1982
	u16	proto;

1983 1984 1985
	/* This is non-zero if the packet may be of the same flow. */
	u8	same_flow:1;

1986
	/* Used in udp_gro_receive */
T
Tom Herbert 已提交
1987 1988 1989 1990 1991
	u8	udp_mark:1;

	/* GRO checksum is valid */
	u8	csum_valid:1;

1992 1993
	/* Number of checksums via CHECKSUM_UNNECESSARY */
	u8	csum_cnt:3;
1994

1995 1996 1997 1998 1999
	/* Free the skb? */
	u8	free:2;
#define NAPI_GRO_FREE		  1
#define NAPI_GRO_FREE_STOLEN_HEAD 2

2000 2001 2002
	/* Used in foo-over-udp, set in udp[46]_gro_receive */
	u8	is_ipv6:1;

2003 2004
	/* 7 bit hole */

2005 2006 2007
	/* used to support CHECKSUM_COMPLETE for tunneling protocols */
	__wsum	csum;

2008 2009
	/* used in skb_gro_receive() slow path */
	struct sk_buff *last;
2010 2011 2012
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2013

L
Linus Torvalds 已提交
2014
struct packet_type {
D
David S. Miller 已提交
2015 2016 2017 2018 2019 2020
	__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 *);
2021 2022
	bool			(*id_match)(struct packet_type *ptype,
					    struct sock *sk);
L
Linus Torvalds 已提交
2023 2024 2025 2026
	void			*af_packet_priv;
	struct list_head	list;
};

2027
struct offload_callbacks {
2028
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
2029
						netdev_features_t features);
2030
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
2031
						 struct sk_buff *skb);
2032
	int			(*gro_complete)(struct sk_buff *skb, int nhoff);
2033 2034 2035 2036
};

struct packet_offload {
	__be16			 type;	/* This is really htons(ether_type). */
2037
	u16			 priority;
2038 2039
	struct offload_callbacks callbacks;
	struct list_head	 list;
L
Linus Torvalds 已提交
2040 2041
};

2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
struct udp_offload;

struct udp_offload_callbacks {
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
						 struct sk_buff *skb,
						 struct udp_offload *uoff);
	int			(*gro_complete)(struct sk_buff *skb,
						int nhoff,
						struct udp_offload *uoff);
};

2053 2054
struct udp_offload {
	__be16			 port;
T
Tom Herbert 已提交
2055
	u8			 ipproto;
2056
	struct udp_offload_callbacks callbacks;
2057 2058
};

2059 2060 2061 2062 2063 2064 2065 2066 2067
/* often modified stats are per cpu, other are shared (netdev->stats) */
struct pcpu_sw_netstats {
	u64     rx_packets;
	u64     rx_bytes;
	u64     tx_packets;
	u64     tx_bytes;
	struct u64_stats_sync   syncp;
};

2068 2069
#define netdev_alloc_pcpu_stats(type)				\
({								\
2070
	typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
2071
	if (pcpu_stats)	{					\
2072 2073
		int __cpu;					\
		for_each_possible_cpu(__cpu) {			\
2074
			typeof(type) *stat;			\
2075
			stat = per_cpu_ptr(pcpu_stats, __cpu);	\
2076 2077 2078 2079 2080 2081
			u64_stats_init(&stat->syncp);		\
		}						\
	}							\
	pcpu_stats;						\
})

L
Linus Torvalds 已提交
2082 2083
#include <linux/notifier.h>

2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
/* 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
2097
#define NETDEV_CHANGEMTU	0x0007 /* notify after mtu change happened */
2098 2099 2100 2101 2102 2103 2104 2105 2106
#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
2107
#define NETDEV_UNREGISTER_FINAL 0x0011
2108 2109 2110
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014
2111
#define NETDEV_CHANGEUPPER	0x0015
2112
#define NETDEV_RESEND_IGMP	0x0016
2113
#define NETDEV_PRECHANGEMTU	0x0017 /* notify before mtu change happened */
2114
#define NETDEV_CHANGEINFODATA	0x0018
2115
#define NETDEV_BONDING_INFO	0x0019
2116

2117 2118
int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);
2119 2120 2121 2122 2123

struct netdev_notifier_info {
	struct net_device *dev;
};

2124 2125 2126 2127 2128
struct netdev_notifier_change_info {
	struct netdev_notifier_info info; /* must be first */
	unsigned int flags_changed;
};

2129 2130 2131 2132 2133 2134
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
					     struct net_device *dev)
{
	info->dev = dev;
}

2135 2136 2137 2138 2139 2140
static inline struct net_device *
netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
{
	return info->dev;
}

2141
int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2142 2143


L
Linus Torvalds 已提交
2144 2145
extern rwlock_t				dev_base_lock;		/* Device list lock */

2146 2147
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2148 2149
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2150 2151
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2152 2153 2154 2155
#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)
2156 2157
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2158 2159
#define for_each_netdev_in_bond_rcu(bond, slave)	\
		for_each_netdev_rcu(&init_net, slave)	\
2160
			if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2161
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
2162

2163 2164 2165 2166 2167
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

2168
	net = dev_net(dev);
2169 2170 2171 2172
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

2173 2174 2175 2176 2177 2178
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
2179
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2180 2181 2182
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

2183 2184 2185 2186 2187
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);
}
2188

E
Eric Dumazet 已提交
2189 2190 2191 2192 2193 2194 2195
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);
}

2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207
int netdev_boot_setup_check(struct net_device *dev);
unsigned long netdev_boot_base(const char *prefix, int unit);
struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
				       const char *hwaddr);
struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
void dev_add_pack(struct packet_type *pt);
void dev_remove_pack(struct packet_type *pt);
void __dev_remove_pack(struct packet_type *pt);
void dev_add_offload(struct packet_offload *po);
void dev_remove_offload(struct packet_offload *po);

2208
int dev_get_iflink(const struct net_device *dev);
2209 2210
struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
				      unsigned short mask);
2211 2212 2213 2214 2215 2216
struct net_device *dev_get_by_name(struct net *net, const char *name);
struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
struct net_device *__dev_get_by_name(struct net *net, const char *name);
int dev_alloc_name(struct net_device *dev, const char *name);
int dev_open(struct net_device *dev);
int dev_close(struct net_device *dev);
2217
int dev_close_many(struct list_head *head, bool unlink);
2218
void dev_disable_lro(struct net_device *dev);
2219 2220 2221 2222 2223 2224
int dev_loopback_xmit(struct sock *sk, struct sk_buff *newskb);
int dev_queue_xmit_sk(struct sock *sk, struct sk_buff *skb);
static inline int dev_queue_xmit(struct sk_buff *skb)
{
	return dev_queue_xmit_sk(skb->sk, skb);
}
2225
int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2226 2227 2228
int register_netdevice(struct net_device *dev);
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
void unregister_netdevice_many(struct list_head *head);
2229 2230 2231 2232 2233
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

2234 2235
int netdev_refcnt_read(const struct net_device *dev);
void free_netdev(struct net_device *dev);
2236
void netdev_freemem(struct net_device *dev);
2237 2238
void synchronize_net(void);
int init_dummy_netdev(struct net_device *dev);
2239

2240 2241 2242 2243 2244 2245
DECLARE_PER_CPU(int, xmit_recursion);
static inline int dev_recursion_level(void)
{
	return this_cpu_read(xmit_recursion);
}

2246 2247 2248 2249 2250 2251
struct net_device *dev_get_by_index(struct net *net, int ifindex);
struct net_device *__dev_get_by_index(struct net *net, int ifindex);
struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
int netdev_get_name(struct net *net, char *name, int ifindex);
int dev_restart(struct net_device *dev);
int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb);
2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267

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;
}

2268 2269
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
2270
{
2271 2272
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
2273

2274 2275 2276 2277
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
2278

2279 2280 2281
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
2282 2283 2284
	if (!pskb_may_pull(skb, hlen))
		return NULL;

2285 2286
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
2287
	return skb->data + offset;
2288
}
L
Linus Torvalds 已提交
2289

H
Herbert Xu 已提交
2290 2291
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
2292 2293
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
2294 2295
}

2296 2297 2298
static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
					const void *start, unsigned int len)
{
T
Tom Herbert 已提交
2299
	if (NAPI_GRO_CB(skb)->csum_valid)
2300 2301 2302 2303
		NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
						  csum_partial(start, len, 0));
}

T
Tom Herbert 已提交
2304 2305 2306 2307 2308 2309 2310
/* GRO checksum functions. These are logical equivalents of the normal
 * checksum functions (in skbuff.h) except that they operate on the GRO
 * offsets and fields in sk_buff.
 */

__sum16 __skb_gro_checksum_complete(struct sk_buff *skb);

2311 2312 2313 2314 2315 2316
static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
{
	return (NAPI_GRO_CB(skb)->gro_remcsum_start - skb_headroom(skb) ==
		skb_gro_offset(skb));
}

T
Tom Herbert 已提交
2317 2318 2319 2320
static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
						      bool zero_okay,
						      __sum16 check)
{
2321 2322 2323
	return ((skb->ip_summed != CHECKSUM_PARTIAL ||
		skb_checksum_start_offset(skb) <
		 skb_gro_offset(skb)) &&
2324
		!skb_at_gro_remcsum_start(skb) &&
2325
		NAPI_GRO_CB(skb)->csum_cnt == 0 &&
T
Tom Herbert 已提交
2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342
		(!zero_okay || check));
}

static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
							   __wsum psum)
{
	if (NAPI_GRO_CB(skb)->csum_valid &&
	    !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
		return 0;

	NAPI_GRO_CB(skb)->csum = psum;

	return __skb_gro_checksum_complete(skb);
}

static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
{
2343 2344 2345 2346 2347 2348 2349 2350 2351
	if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
		/* Consume a checksum from CHECKSUM_UNNECESSARY */
		NAPI_GRO_CB(skb)->csum_cnt--;
	} else {
		/* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
		 * verified a new top level checksum or an encapsulated one
		 * during GRO. This saves work if we fallback to normal path.
		 */
		__skb_incr_checksum_unnecessary(skb);
T
Tom Herbert 已提交
2352 2353 2354 2355 2356 2357 2358 2359 2360 2361
	}
}

#define __skb_gro_checksum_validate(skb, proto, zero_okay, check,	\
				    compute_pseudo)			\
({									\
	__sum16 __ret = 0;						\
	if (__skb_gro_checksum_validate_needed(skb, zero_okay, check))	\
		__ret = __skb_gro_checksum_validate_complete(skb,	\
				compute_pseudo(skb, proto));		\
2362 2363 2364
	if (__ret)							\
		__skb_mark_checksum_bad(skb);				\
	else								\
T
Tom Herbert 已提交
2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378
		skb_gro_incr_csum_unnecessary(skb);			\
	__ret;								\
})

#define skb_gro_checksum_validate(skb, proto, compute_pseudo)		\
	__skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)

#define skb_gro_checksum_validate_zero_check(skb, proto, check,		\
					     compute_pseudo)		\
	__skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)

#define skb_gro_checksum_simple_validate(skb)				\
	__skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)

2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398
static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
{
	return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
		!NAPI_GRO_CB(skb)->csum_valid);
}

static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
					      __sum16 check, __wsum pseudo)
{
	NAPI_GRO_CB(skb)->csum = ~pseudo;
	NAPI_GRO_CB(skb)->csum_valid = 1;
}

#define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo)	\
do {									\
	if (__skb_gro_checksum_convert_check(skb))			\
		__skb_gro_checksum_convert(skb, check,			\
					   compute_pseudo(skb, proto));	\
} while (0)

2399 2400 2401 2402 2403 2404 2405
struct gro_remcsum {
	int offset;
	__wsum delta;
};

static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
{
2406
	grc->offset = 0;
2407 2408 2409
	grc->delta = 0;
}

2410
static inline void skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2411
					   int start, int offset,
2412 2413
					   struct gro_remcsum *grc,
					   bool nopartial)
2414 2415 2416 2417 2418
{
	__wsum delta;

	BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);

2419 2420 2421 2422 2423 2424
	if (!nopartial) {
		NAPI_GRO_CB(skb)->gro_remcsum_start =
		    ((unsigned char *)ptr + start) - skb->head;
		return;
	}

2425 2426 2427 2428
	delta = remcsum_adjust(ptr, NAPI_GRO_CB(skb)->csum, start, offset);

	/* Adjust skb->csum since we changed the packet */
	NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2429 2430 2431

	grc->offset = (ptr + offset) - (void *)skb->head;
	grc->delta = delta;
2432 2433
}

2434 2435 2436 2437 2438 2439 2440 2441
static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
					   struct gro_remcsum *grc)
{
	if (!grc->delta)
		return;

	remcsum_unadjust((__sum16 *)(skb->head + grc->offset), grc->delta);
}
2442

2443 2444
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
2445
				  const void *daddr, const void *saddr,
2446
				  unsigned int len)
2447
{
2448
	if (!dev->header_ops || !dev->header_ops->create)
2449
		return 0;
2450 2451

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2452 2453
}

S
Stephen Hemminger 已提交
2454 2455 2456 2457 2458
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

2459
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
2460
		return 0;
2461
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
2462 2463
}

L
Linus Torvalds 已提交
2464
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2465
int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
L
Linus Torvalds 已提交
2466 2467 2468 2469 2470
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

2471
#ifdef CONFIG_NET_FLOW_LIMIT
2472
#define FLOW_LIMIT_HISTORY	(1 << 7)  /* must be ^2 and !overflow buckets */
2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483
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
2484
/*
E
Eric Dumazet 已提交
2485
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
2486
 */
E
Eric Dumazet 已提交
2487
struct softnet_data {
L
Linus Torvalds 已提交
2488
	struct list_head	poll_list;
2489
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
2490

C
Changli Gao 已提交
2491
	/* stats */
2492 2493 2494 2495
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
2496
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
2497
	struct softnet_data	*rps_ipi_list;
E
Eric Dumazet 已提交
2498 2499 2500 2501 2502 2503 2504
#endif
#ifdef CONFIG_NET_FLOW_LIMIT
	struct sd_flow_limit __rcu *flow_limit;
#endif
	struct Qdisc		*output_queue;
	struct Qdisc		**output_queue_tailp;
	struct sk_buff		*completion_queue;
E
Eric Dumazet 已提交
2505

E
Eric Dumazet 已提交
2506
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
2507
	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
2508
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
2509 2510
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
2511
	unsigned int		input_queue_head;
2512
	unsigned int		input_queue_tail;
2513
#endif
2514
	unsigned int		dropped;
T
Tom Herbert 已提交
2515
	struct sk_buff_head	input_pkt_queue;
2516
	struct napi_struct	backlog;
2517

L
Linus Torvalds 已提交
2518 2519
};

2520
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
2521 2522
{
#ifdef CONFIG_RPS
2523 2524 2525 2526 2527 2528 2529 2530 2531
	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
2532 2533 2534
#endif
}

T
Tom Herbert 已提交
2535
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
2536

2537
void __netif_schedule(struct Qdisc *q);
2538
void netif_schedule_queue(struct netdev_queue *txq);
2539

2540 2541 2542 2543 2544 2545 2546 2547
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));
}

2548 2549
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
2550
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2551 2552
}

2553 2554 2555 2556 2557 2558
/**
 *	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
2559 2560
static inline void netif_start_queue(struct net_device *dev)
{
2561
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2562 2563
}

2564 2565 2566 2567 2568 2569 2570 2571 2572 2573
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);
	}
}

2574
void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2575

2576 2577 2578 2579 2580 2581 2582
/**
 *	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.
 */
2583 2584
static inline void netif_wake_queue(struct net_device *dev)
{
2585
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2586 2587
}

2588 2589 2590 2591 2592 2593 2594 2595 2596 2597
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);
	}
}

2598 2599
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
2600
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2601 2602
}

2603 2604 2605 2606 2607 2608 2609
/**
 *	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
2610 2611
static inline void netif_stop_queue(struct net_device *dev)
{
2612
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2613 2614
}

2615
void netif_tx_stop_all_queues(struct net_device *dev);
2616

2617
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2618
{
2619
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2620 2621
}

2622 2623 2624 2625 2626 2627
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
2628
static inline bool netif_queue_stopped(const struct net_device *dev)
L
Linus Torvalds 已提交
2629
{
2630
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2631 2632
}

2633
static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2634
{
2635 2636 2637
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

2638 2639
static inline bool
netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2640 2641 2642 2643
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
}

2644 2645 2646 2647 2648 2649
static inline bool
netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
{
	return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
}

2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677
/**
 *	netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
 *	@dev_queue: pointer to transmit queue
 *
 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
 * to give appropriate hint to the cpu.
 */
static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
{
#ifdef CONFIG_BQL
	prefetchw(&dev_queue->dql.num_queued);
#endif
}

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

2678 2679 2680
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
T
Tom Herbert 已提交
2681 2682
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);
2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698

	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
2699
#endif
2700 2701
}

2702 2703 2704 2705 2706 2707 2708 2709 2710
/**
 * 	netdev_sent_queue - report the number of bytes queued to hardware
 * 	@dev: network device
 * 	@bytes: number of bytes queued to the hardware device queue
 *
 * 	Report the number of bytes queued for sending/completion to the network
 * 	device hardware queue. @bytes should be a good approximation and should
 * 	exactly match netdev_completed_queue() @bytes
 */
2711 2712 2713 2714 2715 2716
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,
2717
					     unsigned int pkts, unsigned int bytes)
2718
{
T
Tom Herbert 已提交
2719
#ifdef CONFIG_BQL
2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736
	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
2737
#endif
2738 2739
}

2740 2741 2742 2743 2744 2745 2746 2747 2748 2749
/**
 * 	netdev_completed_queue - report bytes and packets completed by device
 * 	@dev: network device
 * 	@pkts: actual number of packets sent over the medium
 * 	@bytes: actual number of bytes sent over the medium
 *
 * 	Report the number of bytes and packets transmitted by the network device
 * 	hardware queue over the physical medium, @bytes must exactly match the
 * 	@bytes amount passed to netdev_sent_queue()
 */
2750
static inline void netdev_completed_queue(struct net_device *dev,
2751
					  unsigned int pkts, unsigned int bytes)
2752 2753 2754 2755 2756 2757
{
	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
2758
#ifdef CONFIG_BQL
2759
	clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
T
Tom Herbert 已提交
2760 2761
	dql_reset(&q->dql);
#endif
2762 2763
}

2764 2765 2766 2767 2768 2769 2770
/**
 * 	netdev_reset_queue - reset the packets and bytes count of a network device
 * 	@dev_queue: network device
 *
 * 	Reset the bytes and packet count of a network device and clear the
 * 	software flow control OFF bit for this network device
 */
2771 2772 2773
static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2774 2775
}

2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795
/**
 * 	netdev_cap_txqueue - check if selected tx queue exceeds device queues
 * 	@dev: network device
 * 	@queue_index: given tx queue index
 *
 * 	Returns 0 if given tx queue index >= number of device tx queues,
 * 	otherwise returns the originally passed tx queue index.
 */
static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
{
	if (unlikely(queue_index >= dev->real_num_tx_queues)) {
		net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
				     dev->name, queue_index,
				     dev->real_num_tx_queues);
		return 0;
	}

	return queue_index;
}

2796 2797 2798 2799 2800 2801
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
2802
static inline bool netif_running(const struct net_device *dev)
L
Linus Torvalds 已提交
2803 2804 2805 2806
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

2807 2808 2809 2810 2811 2812
/*
 * 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.
 */
2813 2814 2815 2816 2817 2818 2819 2820

/**
 *	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.
 */
2821 2822
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
2823
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2824 2825

	netif_tx_start_queue(txq);
2826 2827
}

2828 2829 2830 2831 2832 2833 2834
/**
 *	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.
 */
2835 2836
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
2837
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2838
	netif_tx_stop_queue(txq);
2839 2840
}

2841 2842 2843 2844 2845 2846 2847
/**
 *	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.
 */
2848 2849
static inline bool __netif_subqueue_stopped(const struct net_device *dev,
					    u16 queue_index)
2850
{
2851
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2852 2853

	return netif_tx_queue_stopped(txq);
2854 2855
}

2856 2857
static inline bool netif_subqueue_stopped(const struct net_device *dev,
					  struct sk_buff *skb)
2858 2859 2860
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
2861

2862
void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
2863

2864
#ifdef CONFIG_XPS
2865
int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2866
			u16 index);
2867 2868
#else
static inline int netif_set_xps_queue(struct net_device *dev,
2869
				      const struct cpumask *mask,
2870 2871 2872 2873 2874 2875
				      u16 index)
{
	return 0;
}
#endif

J
Jiri Pirko 已提交
2876 2877 2878
u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
		  unsigned int num_tx_queues);

2879 2880 2881 2882 2883
/*
 * 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,
2884
			      struct sk_buff *skb)
2885 2886 2887 2888
{
	return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2889 2890 2891 2892 2893 2894
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2895
static inline bool netif_is_multiqueue(const struct net_device *dev)
2896
{
E
Eric Dumazet 已提交
2897
	return dev->num_tx_queues > 1;
2898
}
L
Linus Torvalds 已提交
2899

2900
int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2901

2902
#ifdef CONFIG_SYSFS
2903
int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2904 2905 2906 2907 2908 2909 2910 2911
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxq)
{
	return 0;
}
#endif

2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923
#ifdef CONFIG_SYSFS
static inline unsigned int get_netdev_rx_queue_index(
		struct netdev_rx_queue *queue)
{
	struct net_device *dev = queue->dev;
	int index = queue - dev->_rx;

	BUG_ON(index >= dev->num_rx_queues);
	return index;
}
#endif

2924
#define DEFAULT_MAX_NUM_RSS_QUEUES	(8)
2925
int netif_get_num_default_rss_queues(void);
2926

2927 2928 2929 2930 2931 2932 2933
enum skb_free_reason {
	SKB_REASON_CONSUMED,
	SKB_REASON_DROPPED,
};

void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
L
Linus Torvalds 已提交
2934

2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952
/*
 * It is not allowed to call kfree_skb() or consume_skb() from hardware
 * interrupt context or with hardware interrupts being disabled.
 * (in_irq() || irqs_disabled())
 *
 * We provide four helpers that can be used in following contexts :
 *
 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
 *  Typically used in place of consume_skb(skb) in TX completion path
 *
 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
 *  replacing kfree_skb(skb)
 *
 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
 *  and consumed a packet. Used in place of consume_skb(skb)
L
Linus Torvalds 已提交
2953
 */
2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972
static inline void dev_kfree_skb_irq(struct sk_buff *skb)
{
	__dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
}

static inline void dev_consume_skb_irq(struct sk_buff *skb)
{
	__dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
}

static inline void dev_kfree_skb_any(struct sk_buff *skb)
{
	__dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
}

static inline void dev_consume_skb_any(struct sk_buff *skb)
{
	__dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
}
L
Linus Torvalds 已提交
2973

2974 2975
int netif_rx(struct sk_buff *skb);
int netif_rx_ni(struct sk_buff *skb);
2976 2977 2978 2979 2980
int netif_receive_skb_sk(struct sock *sk, struct sk_buff *skb);
static inline int netif_receive_skb(struct sk_buff *skb)
{
	return netif_receive_skb_sk(skb->sk, skb);
}
2981 2982 2983 2984
gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
void napi_gro_flush(struct napi_struct *napi, bool flush_old);
struct sk_buff *napi_get_frags(struct napi_struct *napi);
gro_result_t napi_gro_frags(struct napi_struct *napi);
2985 2986
struct packet_offload *gro_find_receive_by_type(__be16 type);
struct packet_offload *gro_find_complete_by_type(__be16 type);
2987 2988 2989 2990 2991 2992 2993

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

2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004
int netdev_rx_handler_register(struct net_device *dev,
			       rx_handler_func_t *rx_handler,
			       void *rx_handler_data);
void netdev_rx_handler_unregister(struct net_device *dev);

bool dev_valid_name(const char *name);
int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
int dev_ethtool(struct net *net, struct ifreq *);
unsigned int dev_get_flags(const struct net_device *);
int __dev_change_flags(struct net_device *, unsigned int flags);
int dev_change_flags(struct net_device *, unsigned int);
3005 3006
void __dev_notify_flags(struct net_device *, unsigned int old_flags,
			unsigned int gchanges);
3007 3008 3009 3010 3011 3012 3013 3014
int dev_change_name(struct net_device *, const char *);
int dev_set_alias(struct net_device *, const char *, size_t);
int dev_change_net_namespace(struct net_device *, struct net *, const char *);
int dev_set_mtu(struct net_device *, int);
void dev_set_group(struct net_device *, int);
int dev_set_mac_address(struct net_device *, struct sockaddr *);
int dev_change_carrier(struct net_device *, bool new_carrier);
int dev_get_phys_port_id(struct net_device *dev,
3015
			 struct netdev_phys_item_id *ppid);
3016 3017
int dev_get_phys_port_name(struct net_device *dev,
			   char *name, size_t len);
3018
int dev_change_proto_down(struct net_device *dev, bool proto_down);
3019
struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3020 3021
struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
				    struct netdev_queue *txq, int *ret);
H
Herbert Xu 已提交
3022
int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3023
int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3024
bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
L
Linus Torvalds 已提交
3025

3026
extern int		netdev_budget;
L
Linus Torvalds 已提交
3027 3028

/* Called by rtnetlink.c:rtnl_unlock() */
3029
void netdev_run_todo(void);
L
Linus Torvalds 已提交
3030

3031 3032 3033 3034
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
3035
 * Release reference to device to allow it to be freed.
3036
 */
L
Linus Torvalds 已提交
3037 3038
static inline void dev_put(struct net_device *dev)
{
3039
	this_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
3040 3041
}

3042 3043 3044 3045
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
3046
 * Hold reference to device to keep it from being freed.
3047
 */
3048 3049
static inline void dev_hold(struct net_device *dev)
{
3050
	this_cpu_inc(*dev->pcpu_refcnt);
3051
}
L
Linus Torvalds 已提交
3052 3053 3054 3055

/* 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
3056 3057 3058 3059
 *
 * 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
3060 3061
 */

3062 3063 3064
void linkwatch_init_dev(struct net_device *dev);
void linkwatch_fire_event(struct net_device *dev);
void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
3065

3066 3067 3068 3069 3070 3071
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
3072
static inline bool netif_carrier_ok(const struct net_device *dev)
L
Linus Torvalds 已提交
3073 3074 3075 3076
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

3077
unsigned long dev_trans_start(struct net_device *dev);
3078

3079
void __netdev_watchdog_up(struct net_device *dev);
L
Linus Torvalds 已提交
3080

3081
void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
3082

3083
void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
3084

3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097
/**
 *	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
3098 3099 3100 3101 3102 3103
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

3104 3105 3106 3107 3108 3109
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
3110 3111 3112 3113 3114 3115
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

3116 3117 3118 3119 3120 3121
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
3122
static inline bool netif_dormant(const struct net_device *dev)
S
Stefan Rompf 已提交
3123 3124 3125 3126 3127
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


3128 3129 3130 3131 3132 3133
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
3134
static inline bool netif_oper_up(const struct net_device *dev)
E
Eric Dumazet 已提交
3135
{
S
Stefan Rompf 已提交
3136 3137 3138 3139
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

3140 3141 3142 3143 3144 3145
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
3146
static inline bool netif_device_present(struct net_device *dev)
L
Linus Torvalds 已提交
3147 3148 3149 3150
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

3151
void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
3152

3153
void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203

/*
 * 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;
}

3204
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
3205
{
3206 3207
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
3208 3209
}

3210 3211 3212 3213 3214 3215
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

3216
static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3217
{
3218
	bool ok = spin_trylock(&txq->_xmit_lock);
3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235
	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
3236 3237 3238 3239 3240 3241
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

3242 3243 3244 3245 3246 3247
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
3248 3249
static inline void netif_tx_lock(struct net_device *dev)
{
3250
	unsigned int i;
3251
	int cpu;
3252

3253 3254
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
3255 3256
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3257 3258 3259 3260 3261 3262 3263

		/* 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.
		 */
3264
		__netif_tx_lock(txq, cpu);
3265 3266
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
3267
	}
H
Herbert Xu 已提交
3268 3269 3270 3271
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
3272 3273
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
3274 3275 3276 3277
}

static inline void netif_tx_unlock(struct net_device *dev)
{
3278 3279 3280 3281
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3282

3283 3284 3285 3286 3287
		/* 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);
3288
		netif_schedule_queue(txq);
3289 3290
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
3291 3292 3293 3294
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
3295 3296
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
3297 3298
}

3299
#define HARD_TX_LOCK(dev, txq, cpu) {			\
3300
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
3301
		__netif_tx_lock(txq, cpu);		\
3302 3303 3304
	}						\
}

3305 3306 3307 3308 3309
#define HARD_TX_TRYLOCK(dev, txq)			\
	(((dev->features & NETIF_F_LLTX) == 0) ?	\
		__netif_tx_trylock(txq) :		\
		true )

3310
#define HARD_TX_UNLOCK(dev, txq) {			\
3311
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
3312
		__netif_tx_unlock(txq);			\
3313 3314 3315
	}						\
}

L
Linus Torvalds 已提交
3316 3317
static inline void netif_tx_disable(struct net_device *dev)
{
3318
	unsigned int i;
3319
	int cpu;
3320

3321 3322
	local_bh_disable();
	cpu = smp_processor_id();
3323 3324
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3325 3326

		__netif_tx_lock(txq, cpu);
3327
		netif_tx_stop_queue(txq);
3328
		__netif_tx_unlock(txq);
3329
	}
3330
	local_bh_enable();
L
Linus Torvalds 已提交
3331 3332
}

3333 3334 3335 3336 3337
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

3338 3339
static inline void netif_addr_lock_nested(struct net_device *dev)
{
3340 3341 3342 3343 3344 3345
	int subclass = SINGLE_DEPTH_NESTING;

	if (dev->netdev_ops->ndo_get_lock_subclass)
		subclass = dev->netdev_ops->ndo_get_lock_subclass(dev);

	spin_lock_nested(&dev->addr_list_lock, subclass);
3346 3347
}

3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362
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);
}

3363
/*
3364
 * dev_addrs walker. Should be used only for read access. Call with
3365 3366 3367
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
3368
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3369

L
Linus Torvalds 已提交
3370 3371
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

3372
void ether_setup(struct net_device *dev);
L
Linus Torvalds 已提交
3373 3374

/* Support for loadable net-drivers */
3375
struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3376
				    unsigned char name_assign_type,
3377 3378
				    void (*setup)(struct net_device *),
				    unsigned int txqs, unsigned int rxqs);
3379 3380
#define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
	alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
T
Tom Herbert 已提交
3381

3382 3383 3384
#define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
	alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
			 count)
T
Tom Herbert 已提交
3385

3386 3387
int register_netdev(struct net_device *dev);
void unregister_netdev(struct net_device *dev);
3388

3389
/* General hardware address lists handling functions */
3390 3391 3392 3393
int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
		   struct netdev_hw_addr_list *from_list, int addr_len);
void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
		      struct netdev_hw_addr_list *from_list, int addr_len);
3394 3395 3396 3397 3398 3399 3400 3401 3402
int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
		       struct net_device *dev,
		       int (*sync)(struct net_device *, const unsigned char *),
		       int (*unsync)(struct net_device *,
				     const unsigned char *));
void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
			  struct net_device *dev,
			  int (*unsync)(struct net_device *,
					const unsigned char *));
3403
void __hw_addr_init(struct netdev_hw_addr_list *list);
3404

3405
/* Functions used for device addresses handling */
3406 3407 3408 3409 3410 3411
int dev_addr_add(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);
int dev_addr_del(struct net_device *dev, const unsigned char *addr,
		 unsigned char addr_type);
void dev_addr_flush(struct net_device *dev);
int dev_addr_init(struct net_device *dev);
3412 3413

/* Functions used for unicast addresses handling */
3414 3415 3416 3417 3418 3419 3420 3421
int dev_uc_add(struct net_device *dev, const unsigned char *addr);
int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_uc_del(struct net_device *dev, const unsigned char *addr);
int dev_uc_sync(struct net_device *to, struct net_device *from);
int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_uc_unsync(struct net_device *to, struct net_device *from);
void dev_uc_flush(struct net_device *dev);
void dev_uc_init(struct net_device *dev);
3422

3423 3424 3425 3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 3441
/**
 *  __dev_uc_sync - Synchonize device's unicast list
 *  @dev:  device to sync
 *  @sync: function to call if address should be added
 *  @unsync: function to call if address should be removed
 *
 *  Add newly added addresses to the interface, and release
 *  addresses that have been deleted.
 **/
static inline int __dev_uc_sync(struct net_device *dev,
				int (*sync)(struct net_device *,
					    const unsigned char *),
				int (*unsync)(struct net_device *,
					      const unsigned char *))
{
	return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
}

/**
3442
 *  __dev_uc_unsync - Remove synchronized addresses from device
3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454
 *  @dev:  device to sync
 *  @unsync: function to call if address should be removed
 *
 *  Remove all addresses that were added to the device by dev_uc_sync().
 **/
static inline void __dev_uc_unsync(struct net_device *dev,
				   int (*unsync)(struct net_device *,
						 const unsigned char *))
{
	__hw_addr_unsync_dev(&dev->uc, dev, unsync);
}

3455
/* Functions used for multicast addresses handling */
3456 3457 3458 3459 3460 3461 3462 3463 3464 3465
int dev_mc_add(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
int dev_mc_del(struct net_device *dev, const unsigned char *addr);
int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
int dev_mc_sync(struct net_device *to, struct net_device *from);
int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
void dev_mc_unsync(struct net_device *to, struct net_device *from);
void dev_mc_flush(struct net_device *dev);
void dev_mc_init(struct net_device *dev);
3466

3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485
/**
 *  __dev_mc_sync - Synchonize device's multicast list
 *  @dev:  device to sync
 *  @sync: function to call if address should be added
 *  @unsync: function to call if address should be removed
 *
 *  Add newly added addresses to the interface, and release
 *  addresses that have been deleted.
 **/
static inline int __dev_mc_sync(struct net_device *dev,
				int (*sync)(struct net_device *,
					    const unsigned char *),
				int (*unsync)(struct net_device *,
					      const unsigned char *))
{
	return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
}

/**
3486
 *  __dev_mc_unsync - Remove synchronized addresses from device
3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498
 *  @dev:  device to sync
 *  @unsync: function to call if address should be removed
 *
 *  Remove all addresses that were added to the device by dev_mc_sync().
 **/
static inline void __dev_mc_unsync(struct net_device *dev,
				   int (*unsync)(struct net_device *,
						 const unsigned char *))
{
	__hw_addr_unsync_dev(&dev->mc, dev, unsync);
}

3499
/* Functions used for secondary unicast and multicast support */
3500 3501 3502 3503 3504 3505 3506
void dev_set_rx_mode(struct net_device *dev);
void __dev_set_rx_mode(struct net_device *dev);
int dev_set_promiscuity(struct net_device *dev, int inc);
int dev_set_allmulti(struct net_device *dev, int inc);
void netdev_state_change(struct net_device *dev);
void netdev_notify_peers(struct net_device *dev);
void netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
3507
/* Load a device via the kmod */
3508 3509 3510 3511 3512
void dev_load(struct net *net, const char *name);
struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					struct rtnl_link_stats64 *storage);
void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
			     const struct net_device_stats *netdev_stats);
3513

L
Linus Torvalds 已提交
3514
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
3515
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
3516
extern int		weight_p;
3517
extern int		bpf_jit_enable;
J
Jiri Pirko 已提交
3518

3519
bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3520 3521
struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);
3522 3523
struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);
3524

3525 3526 3527 3528 3529 3530 3531
/* iterate through upper list, must be called under RCU read lock */
#define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
	for (iter = &(dev)->adj_list.upper, \
	     updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
	     updev; \
	     updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))

3532
/* iterate through upper list, must be called under RCU read lock */
3533 3534 3535 3536 3537
#define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \
	for (iter = &(dev)->all_adj_list.upper, \
	     updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \
	     updev; \
	     updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)))
3538

3539 3540 3541 3542
void *netdev_lower_get_next_private(struct net_device *dev,
				    struct list_head **iter);
void *netdev_lower_get_next_private_rcu(struct net_device *dev,
					struct list_head **iter);
3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555

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

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

3556 3557 3558 3559 3560 3561 3562 3563
void *netdev_lower_get_next(struct net_device *dev,
				struct list_head **iter);
#define netdev_for_each_lower_dev(dev, ldev, iter) \
	for (iter = &(dev)->adj_list.lower, \
	     ldev = netdev_lower_get_next(dev, &(iter)); \
	     ldev; \
	     ldev = netdev_lower_get_next(dev, &(iter)))

3564
void *netdev_adjacent_get_private(struct list_head *adj_list);
3565
void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3566 3567 3568 3569
struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev);
int netdev_master_upper_dev_link(struct net_device *dev,
J
Jiri Pirko 已提交
3570
				 struct net_device *upper_dev);
3571 3572 3573 3574 3575
int netdev_master_upper_dev_link_private(struct net_device *dev,
					 struct net_device *upper_dev,
					 void *private);
void netdev_upper_dev_unlink(struct net_device *dev,
			     struct net_device *upper_dev);
3576
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3577 3578
void *netdev_lower_dev_get_private(struct net_device *dev,
				   struct net_device *lower_dev);
3579 3580 3581 3582 3583 3584

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

3585 3586
int dev_get_nest_level(struct net_device *dev,
		       bool (*type_check)(struct net_device *dev));
3587 3588 3589 3590 3591
int skb_checksum_help(struct sk_buff *skb);
struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
				  netdev_features_t features, bool tx_path);
struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
				    netdev_features_t features);
3592

3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605
struct netdev_bonding_info {
	ifslave	slave;
	ifbond	master;
};

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

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

3606 3607 3608 3609 3610
static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{
	return __skb_gso_segment(skb, features, true);
}
3611
__be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623

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)));
}
3624

3625
#ifdef CONFIG_BUG
3626
void netdev_rx_csum_fault(struct net_device *dev);
3627 3628 3629 3630 3631
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
3632
/* rx skb timestamps */
3633 3634
void net_enable_timestamp(void);
void net_disable_timestamp(void);
L
Linus Torvalds 已提交
3635

3636
#ifdef CONFIG_PROC_FS
3637
int __init dev_proc_init(void);
3638 3639
#else
#define dev_proc_init() 0
3640 3641
#endif

D
David S. Miller 已提交
3642
static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3643 3644
					      struct sk_buff *skb, struct net_device *dev,
					      bool more)
D
David S. Miller 已提交
3645
{
3646
	skb->xmit_more = more ? 1 : 0;
3647
	return ops->ndo_start_xmit(skb, dev);
D
David S. Miller 已提交
3648 3649
}

3650
static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3651
					    struct netdev_queue *txq, bool more)
D
David S. Miller 已提交
3652 3653
{
	const struct net_device_ops *ops = dev->netdev_ops;
3654
	int rc;
D
David S. Miller 已提交
3655

3656
	rc = __netdev_start_xmit(ops, skb, dev, more);
3657 3658 3659 3660
	if (rc == NETDEV_TX_OK)
		txq_trans_update(txq);

	return rc;
D
David S. Miller 已提交
3661 3662
}

3663 3664 3665 3666
int netdev_class_create_file_ns(struct class_attribute *class_attr,
				const void *ns);
void netdev_class_remove_file_ns(struct class_attribute *class_attr,
				 const void *ns);
3667 3668 3669 3670 3671 3672 3673 3674 3675 3676

static inline int netdev_class_create_file(struct class_attribute *class_attr)
{
	return netdev_class_create_file_ns(class_attr, NULL);
}

static inline void netdev_class_remove_file(struct class_attribute *class_attr)
{
	netdev_class_remove_file_ns(class_attr, NULL);
}
3677

3678 3679
extern struct kobj_ns_type_operations net_ns_type_operations;

3680
const char *netdev_drivername(const struct net_device *dev);
3681

3682
void linkwatch_run_queue(void);
3683

3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697
static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
							  netdev_features_t f2)
{
	if (f1 & NETIF_F_GEN_CSUM)
		f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
	if (f2 & NETIF_F_GEN_CSUM)
		f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);
	f1 &= f2;
	if (f1 & NETIF_F_GEN_CSUM)
		f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM);

	return f1;
}

3698 3699
static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
3700 3701 3702
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
3703 3704
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);
3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715

/* 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);
}

3716
int __netdev_update_features(struct net_device *dev);
3717
void netdev_update_features(struct net_device *dev);
3718
void netdev_change_features(struct net_device *dev);
3719

3720 3721 3722
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

3723 3724 3725
netdev_features_t passthru_features_check(struct sk_buff *skb,
					  struct net_device *dev,
					  netdev_features_t features);
3726
netdev_features_t netif_skb_features(struct sk_buff *skb);
3727

3728
static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3729
{
3730
	netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3731 3732 3733 3734 3735 3736 3737 3738

	/* 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));
3739 3740 3741 3742 3743 3744
	BUILD_BUG_ON(SKB_GSO_GRE     != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_IPIP    != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_SIT     != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
	BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
3745
	BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
3746

3747
	return (features & feature) == feature;
3748 3749
}

3750
static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3751
{
H
Herbert Xu 已提交
3752
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3753
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3754 3755
}

3756
static inline bool netif_needs_gso(struct sk_buff *skb,
3757
				   netdev_features_t features)
3758
{
3759
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3760 3761
		unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
			 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3762 3763
}

3764 3765 3766 3767 3768 3769
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782
static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
					int pulled_hlen, u16 mac_offset,
					int mac_len)
{
	skb->protocol = protocol;
	skb->encapsulation = 1;
	skb_push(skb, pulled_hlen);
	skb_reset_transport_header(skb);
	skb->mac_header = mac_offset;
	skb->network_header = skb->mac_header + mac_len;
	skb->mac_len = mac_len;
}

3783 3784 3785 3786 3787
static inline bool netif_is_macvlan(struct net_device *dev)
{
	return dev->priv_flags & IFF_MACVLAN;
}

3788 3789 3790 3791 3792
static inline bool netif_is_macvlan_port(struct net_device *dev)
{
	return dev->priv_flags & IFF_MACVLAN_PORT;
}

3793 3794 3795 3796 3797 3798 3799 3800 3801 3802
static inline bool netif_is_ipvlan(struct net_device *dev)
{
	return dev->priv_flags & IFF_IPVLAN_SLAVE;
}

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

3803 3804 3805 3806 3807
static inline bool netif_is_bond_master(struct net_device *dev)
{
	return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
}

3808
static inline bool netif_is_bond_slave(struct net_device *dev)
J
Jiri Pirko 已提交
3809 3810 3811 3812
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

3813 3814 3815 3816 3817
static inline bool netif_supports_nofcs(struct net_device *dev)
{
	return dev->priv_flags & IFF_SUPP_NOFCS;
}

3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833
static inline bool netif_is_vrf(const struct net_device *dev)
{
	return dev->priv_flags & IFF_VRF_MASTER;
}

static inline bool netif_index_is_vrf(struct net *net, int ifindex)
{
	struct net_device *dev = dev_get_by_index_rcu(net, ifindex);
	bool rc = false;

	if (dev)
		rc = netif_is_vrf(dev);

	return rc;
}

3834 3835 3836 3837 3838 3839
/* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
static inline void netif_keep_dst(struct net_device *dev)
{
	dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
}

3840
extern struct pernet_operations __net_initdata loopback_net_ops;
3841

3842 3843 3844 3845 3846 3847
/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* netdev_printk helpers, similar to dev_printk */

static inline const char *netdev_name(const struct net_device *dev)
{
3848 3849
	if (!dev->name[0] || strchr(dev->name, '%'))
		return "(unnamed net_device)";
3850 3851 3852
	return dev->name;
}

3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867
static inline const char *netdev_reg_state(const struct net_device *dev)
{
	switch (dev->reg_state) {
	case NETREG_UNINITIALIZED: return " (uninitialized)";
	case NETREG_REGISTERED: return "";
	case NETREG_UNREGISTERING: return " (unregistering)";
	case NETREG_UNREGISTERED: return " (unregistered)";
	case NETREG_RELEASED: return " (released)";
	case NETREG_DUMMY: return " (dummy)";
	}

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

3868
__printf(3, 4)
3869 3870
void netdev_printk(const char *level, const struct net_device *dev,
		   const char *format, ...);
3871
__printf(2, 3)
3872
void netdev_emerg(const struct net_device *dev, const char *format, ...);
3873
__printf(2, 3)
3874
void netdev_alert(const struct net_device *dev, const char *format, ...);
3875
__printf(2, 3)
3876
void netdev_crit(const struct net_device *dev, const char *format, ...);
3877
__printf(2, 3)
3878
void netdev_err(const struct net_device *dev, const char *format, ...);
3879
__printf(2, 3)
3880
void netdev_warn(const struct net_device *dev, const char *format, ...);
3881
__printf(2, 3)
3882
void netdev_notice(const struct net_device *dev, const char *format, ...);
3883
__printf(2, 3)
3884
void netdev_info(const struct net_device *dev, const char *format, ...);
3885

3886 3887 3888
#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

3889
#if defined(CONFIG_DYNAMIC_DEBUG)
3890 3891
#define netdev_dbg(__dev, format, args...)			\
do {								\
3892
	dynamic_netdev_dbg(__dev, format, ##args);		\
3893
} while (0)
3894 3895 3896
#elif defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
})
#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...)			\
3923 3924
	WARN(1, "netdevice: %s%s\n" format, netdev_name(dev),	\
	     netdev_reg_state(dev), ##args)
3925

3926 3927 3928 3929 3930 3931 3932 3933
/* 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)

3934 3935 3936 3937 3938 3939
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

3940
#define netif_emerg(priv, type, dev, fmt, args...)		\
3941
	netif_level(emerg, priv, type, dev, fmt, ##args)
3942
#define netif_alert(priv, type, dev, fmt, args...)		\
3943
	netif_level(alert, priv, type, dev, fmt, ##args)
3944
#define netif_crit(priv, type, dev, fmt, args...)		\
3945
	netif_level(crit, priv, type, dev, fmt, ##args)
3946
#define netif_err(priv, type, dev, fmt, args...)		\
3947
	netif_level(err, priv, type, dev, fmt, ##args)
3948
#define netif_warn(priv, type, dev, fmt, args...)		\
3949
	netif_level(warn, priv, type, dev, fmt, ##args)
3950
#define netif_notice(priv, type, dev, fmt, args...)		\
3951
	netif_level(notice, priv, type, dev, fmt, ##args)
3952
#define netif_info(priv, type, dev, fmt, args...)		\
3953
	netif_level(info, priv, type, dev, fmt, ##args)
3954

3955
#if defined(CONFIG_DYNAMIC_DEBUG)
3956 3957 3958
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
3959
		dynamic_netdev_dbg(netdev, format, ##args);	\
3960
} while (0)
3961 3962 3963
#elif defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
3964 3965 3966 3967 3968 3969 3970 3971 3972 3973
#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)
3974
#define netif_vdbg	netif_dbg
3975 3976 3977 3978
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
3979
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
3980 3981 3982
	0;							\
})
#endif
3983

3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010 4011 4012 4013
/*
 *	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)

4014
#endif	/* _LINUX_NETDEVICE_H */