netdevice.h 126.0 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_HYPERV_NET)
# define LL_MAX_HEADER 128
#elif 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 (busy polling possible) */
	NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
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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_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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 * Used for busy polling (CONFIG_NET_RX_BUSY_POLL)
 * Note: This is normally automatically done from netif_napi_add(),
 * so might disappear in a future linux version.
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 */
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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
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 * before freeing memory containing @napi, if
 * this function returns true.
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 * Note: core networking stack automatically calls it
 * from netif_napi_del()
 * Drivers might want to call this helper to combine all
 * the needed rcu grace periods into a single one.
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 */
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bool 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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	clear_bit(NAPI_STATE_NPSVC, &n->state);
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}

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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;
566
#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
572 573 574 575 576
/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
577 578 579 580
	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
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	/*
	 * Number of TX timeouts for this queue
	 * (/sys/class/net/DEV/Q/trans_timeout)
	 */
	unsigned long		trans_timeout;
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	unsigned long		state;

#ifdef CONFIG_BQL
	struct dql		dql;
#endif
593
	unsigned long		tx_maxrate;
594
} ____cacheline_aligned_in_smp;
595

596 597 598 599 600
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
601
	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];
};
622
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
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/*
625 626 627
 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
 * tail pointer for that CPU's input queue at the time of last enqueue, and
 * a hardware filter index.
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 */
struct rps_dev_flow {
	u16 cpu;
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	u16 filter;
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	unsigned int last_qtail;
};
634
#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) + \
645
    ((_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).
650 651 652 653 654 655
 * 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 {
658
	u32	mask;
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	u32	ents[0] ____cacheline_aligned_in_smp;
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};
662
#define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
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#define RPS_NO_CPU 0xffff

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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) {
673 674
		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 */
677
		val |= raw_smp_processor_id();
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679 680
		if (table->ents[index] != val)
			table->ents[index] = val;
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	}
}

684
#ifdef CONFIG_RFS_ACCEL
685 686
bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
			 u16 filter_id);
687
#endif
688
#endif /* CONFIG_RPS */
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/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
692
#ifdef CONFIG_RPS
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	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
695
#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];
};
722
#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
723 724
#define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
       - sizeof(struct xps_map)) / sizeof(u16))
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/*
 * 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 */

737 738 739 740 741 742 743 744
#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;
};

745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
#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

762
#define MAX_PHYS_ITEM_ID_LEN 32
763

764 765
/* This structure holds a unique identifier to identify some
 * physical item (port for example) used by a netdevice.
766
 */
767 768
struct netdev_phys_item_id {
	unsigned char id[MAX_PHYS_ITEM_ID_LEN];
769 770 771
	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;
}

779 780 781
typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
				       struct sk_buff *skb);

782 783
/*
 * This structure defines the management hooks for network devices.
784 785
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804
 *
 * 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.
 *
805 806
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
807
 *	Called when a packet needs to be transmitted.
808 809 810 811
 *	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.
812
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
813 814
 *	Required can not be NULL.
 *
815
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
816
 *                         void *accel_priv, select_queue_fallback_t fallback);
817 818 819
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
820 821 822 823 824 825
 * 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.
826 827
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
828 829 830
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
831
 *	needs to be changed. If this interface is not defined, the
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851
 *	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.
 *
852
 * void (*ndo_tx_timeout)(struct net_device *dev);
853 854 855
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
856
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
857
 *                      struct rtnl_link_stats64 *storage);
858
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
859
 *	Called when a user wants to get the network device usage
860
 *	statistics. Drivers must do one of the following:
861 862
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
863
 *	2. Define @ndo_get_stats to update a net_device_stats structure
864 865 866 867 868
 *	   (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.
869
 *
870
 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
871 872
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is registered.
873
 *
874
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
875 876
 *	If device support VLAN filtering this function is called when a
 *	VLAN id is unregistered.
877 878
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
879 880 881 882
 *
 *	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);
883 884
 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
 *			  int max_tx_rate);
885
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
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 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
887 888
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
889
 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
890 891
 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
 *			  struct nlattr *port[]);
892 893 894 895 896
 *
 *      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);
897
 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
898 899 900 901 902
 * 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.
903
 *
904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933
 *	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.
 *
934 935 936 937 938 939 940
 * 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.
 *
941 942 943 944 945 946
 * 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.
 *
947 948 949 950 951 952
 *	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.
953
 *
954
 *	Slave management functions (for bridge, bonding, etc).
955 956 957 958 959
 * 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.
960 961
 *
 *      Feature/offload setting functions.
962 963
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
964 965 966 967
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
968
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
969 970 971 972
 *	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.
 *
973 974
 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
975
 *		      const unsigned char *addr, u16 vid, u16 flags)
976
 *	Adds an FDB entry to dev for addr.
977 978
 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
 *		      struct net_device *dev,
979
 *		      const unsigned char *addr, u16 vid)
980 981
 *	Deletes the FDB entry from dev coresponding to addr.
 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
982 983
 *		       struct net_device *dev, struct net_device *filter_dev,
 *		       int idx)
984 985
 *	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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 *
987 988
 * 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,
990 991
 *			     struct net_device *dev, u32 filter_mask,
 *			     int nlflags)
992 993
 * 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.
1002 1003
 *
 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1004
 *			       struct netdev_phys_item_id *ppid);
1005 1006 1007
 *	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.
1008 1009
 *
 * void (*ndo_add_vxlan_port)(struct  net_device *dev,
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 *			      sa_family_t sa_family, __be16 port);
1011 1012 1013 1014 1015 1016
 *	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);
1018 1019 1020
 *	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.
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
 *
 * 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.
1040 1041 1042
 * 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
1044 1045 1046 1047 1048
 *	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.
1049 1050 1051 1052
 * 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.
1053 1054
 * int (*ndo_get_iflink)(const struct net_device *dev);
 *	Called to get the iflink value of this device.
1055 1056 1057 1058 1059
 * 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.
1060 1061 1062 1063
 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
 *	This function is used to get egress tunnel information for given skb.
 *	This is useful for retrieving outer tunnel header parameters while
 *	sampling packet.
1064
 *
1065 1066 1067 1068 1069 1070
 */
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);
1071
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
1072 1073
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
1074
						    struct sk_buff *skb,
1075 1076
						    void *accel_priv,
						    select_queue_fallback_t fallback);
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
	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);
1087 1088 1089 1090
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
1091 1092
	void			(*ndo_tx_timeout) (struct net_device *dev);

1093 1094
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
1095 1096
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

1097
	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
1098
						       __be16 proto, u16 vid);
1099
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1100
						        __be16 proto, u16 vid);
1101 1102
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
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Herbert Xu 已提交
1103
	int			(*ndo_netpoll_setup)(struct net_device *dev,
1104
						     struct netpoll_info *info);
1105
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
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Eliezer Tamir 已提交
1106
#endif
1107
#ifdef CONFIG_NET_RX_BUSY_POLL
1108
	int			(*ndo_busy_poll)(struct napi_struct *dev);
1109
#endif
1110 1111 1112 1113
	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);
1114 1115 1116
	int			(*ndo_set_vf_rate)(struct net_device *dev,
						   int vf, int min_tx_rate,
						   int max_tx_rate);
1117 1118
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
H
Hiroshi Shimamoto 已提交
1119 1120
	int			(*ndo_set_vf_trust)(struct net_device *dev,
						    int vf, bool setting);
1121 1122 1123
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
1124 1125
	int			(*ndo_set_vf_link_state)(struct net_device *dev,
							 int vf, int link_state);
1126 1127 1128 1129
	int			(*ndo_get_vf_stats)(struct net_device *dev,
						    int vf,
						    struct ifla_vf_stats
						    *vf_stats);
1130 1131 1132 1133 1134
	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);
1135 1136 1137
	int			(*ndo_set_vf_rss_query_en)(
						   struct net_device *dev,
						   int vf, bool setting);
1138
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
1139
#if IS_ENABLED(CONFIG_FCOE)
1140 1141
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
1142 1143 1144 1145 1146 1147
	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);
1148 1149 1150 1151
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
1152 1153
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
1154 1155
#endif

1156
#if IS_ENABLED(CONFIG_LIBFCOE)
1157 1158 1159 1160
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
1161
#endif
1162

1163 1164 1165 1166 1167 1168
#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
1169 1170 1171 1172
	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);
1173 1174
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
1175
	int			(*ndo_set_features)(struct net_device *dev,
1176
						    netdev_features_t features);
1177
	int			(*ndo_neigh_construct)(struct neighbour *n);
1178
	void			(*ndo_neigh_destroy)(struct neighbour *n);
1179 1180

	int			(*ndo_fdb_add)(struct ndmsg *ndm,
1181
					       struct nlattr *tb[],
1182
					       struct net_device *dev,
1183
					       const unsigned char *addr,
1184
					       u16 vid,
1185 1186
					       u16 flags);
	int			(*ndo_fdb_del)(struct ndmsg *ndm,
1187
					       struct nlattr *tb[],
1188
					       struct net_device *dev,
1189 1190
					       const unsigned char *addr,
					       u16 vid);
1191 1192 1193
	int			(*ndo_fdb_dump)(struct sk_buff *skb,
						struct netlink_callback *cb,
						struct net_device *dev,
1194
						struct net_device *filter_dev,
1195
						int idx);
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John Fastabend 已提交
1196 1197

	int			(*ndo_bridge_setlink)(struct net_device *dev,
1198 1199
						      struct nlmsghdr *nlh,
						      u16 flags);
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John Fastabend 已提交
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	int			(*ndo_bridge_getlink)(struct sk_buff *skb,
						      u32 pid, u32 seq,
1202
						      struct net_device *dev,
1203 1204
						      u32 filter_mask,
						      int nlflags);
1205
	int			(*ndo_bridge_dellink)(struct net_device *dev,
1206 1207
						      struct nlmsghdr *nlh,
						      u16 flags);
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Jiri Pirko 已提交
1208 1209
	int			(*ndo_change_carrier)(struct net_device *dev,
						      bool new_carrier);
1210
	int			(*ndo_get_phys_port_id)(struct net_device *dev,
1211
							struct netdev_phys_item_id *ppid);
1212 1213
	int			(*ndo_get_phys_port_name)(struct net_device *dev,
							  char *name, size_t len);
1214 1215
	void			(*ndo_add_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1216
						      __be16 port);
1217 1218
	void			(*ndo_del_vxlan_port)(struct  net_device *dev,
						      sa_family_t sa_family,
J
Joseph Gasparakis 已提交
1219
						      __be16 port);
1220 1221 1222 1223 1224 1225 1226 1227 1228

	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);
1229
	int			(*ndo_get_lock_subclass)(struct net_device *dev);
1230 1231 1232
	netdev_features_t	(*ndo_features_check) (struct sk_buff *skb,
						       struct net_device *dev,
						       netdev_features_t features);
1233 1234 1235
	int			(*ndo_set_tx_maxrate)(struct net_device *dev,
						      int queue_index,
						      u32 maxrate);
1236
	int			(*ndo_get_iflink)(const struct net_device *dev);
1237 1238
	int			(*ndo_change_proto_down)(struct net_device *dev,
							 bool proto_down);
1239 1240
	int			(*ndo_fill_metadata_dst)(struct net_device *dev,
						       struct sk_buff *skb);
1241 1242
};

1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
/**
 * 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_BONDING: bonding master or slave
 * @IFF_ISATAP: ISATAP interface (RFC4214)
 * @IFF_WAN_HDLC: WAN HDLC device
 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
 *	release skb->dst
 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
 * @IFF_MACVLAN_PORT: device used as macvlan port
 * @IFF_BRIDGE_PORT: device used as bridge port
 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
 * @IFF_UNICAST_FLT: Supports unicast filtering
 * @IFF_TEAM_PORT: device used as team port
 * @IFF_SUPP_NOFCS: device supports sending custom FCS
 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
 *	change when it's running
 * @IFF_MACVLAN: Macvlan device
1272
 * @IFF_L3MDEV_MASTER: device is an L3 master device
1273
 * @IFF_NO_QUEUE: device can run without qdisc attached
1274
 * @IFF_OPENVSWITCH: device is a Open vSwitch master
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David Ahern 已提交
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 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
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Jiri Pirko 已提交
1276
 * @IFF_TEAM: device is a team device
1277 1278 1279 1280
 */
enum netdev_priv_flags {
	IFF_802_1Q_VLAN			= 1<<0,
	IFF_EBRIDGE			= 1<<1,
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
	IFF_BONDING			= 1<<2,
	IFF_ISATAP			= 1<<3,
	IFF_WAN_HDLC			= 1<<4,
	IFF_XMIT_DST_RELEASE		= 1<<5,
	IFF_DONT_BRIDGE			= 1<<6,
	IFF_DISABLE_NETPOLL		= 1<<7,
	IFF_MACVLAN_PORT		= 1<<8,
	IFF_BRIDGE_PORT			= 1<<9,
	IFF_OVS_DATAPATH		= 1<<10,
	IFF_TX_SKB_SHARING		= 1<<11,
	IFF_UNICAST_FLT			= 1<<12,
	IFF_TEAM_PORT			= 1<<13,
	IFF_SUPP_NOFCS			= 1<<14,
	IFF_LIVE_ADDR_CHANGE		= 1<<15,
	IFF_MACVLAN			= 1<<16,
	IFF_XMIT_DST_RELEASE_PERM	= 1<<17,
	IFF_IPVLAN_MASTER		= 1<<18,
	IFF_IPVLAN_SLAVE		= 1<<19,
1299
	IFF_L3MDEV_MASTER		= 1<<20,
1300 1301
	IFF_NO_QUEUE			= 1<<21,
	IFF_OPENVSWITCH			= 1<<22,
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David Ahern 已提交
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	IFF_L3MDEV_SLAVE		= 1<<23,
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Jiri Pirko 已提交
1303
	IFF_TEAM			= 1<<24,
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
};

#define IFF_802_1Q_VLAN			IFF_802_1Q_VLAN
#define IFF_EBRIDGE			IFF_EBRIDGE
#define IFF_BONDING			IFF_BONDING
#define IFF_ISATAP			IFF_ISATAP
#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
1323
#define IFF_XMIT_DST_RELEASE_PERM	IFF_XMIT_DST_RELEASE_PERM
1324 1325
#define IFF_IPVLAN_MASTER		IFF_IPVLAN_MASTER
#define IFF_IPVLAN_SLAVE		IFF_IPVLAN_SLAVE
1326
#define IFF_L3MDEV_MASTER		IFF_L3MDEV_MASTER
1327
#define IFF_NO_QUEUE			IFF_NO_QUEUE
1328
#define IFF_OPENVSWITCH			IFF_OPENVSWITCH
1329
#define IFF_L3MDEV_SLAVE		IFF_L3MDEV_SLAVE
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Jiri Pirko 已提交
1330
#define IFF_TEAM			IFF_TEAM
1331

1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
/**
 *	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
 *
1349 1350
 *	@carrier_changes:	Stats to monitor carrier on<->off transitions
 *
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
 *	@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
1374
 *	@group:		The group, that the device belongs to
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391
 *
 *	@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
1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405
 *			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
1406 1407
 *	@hard_header_len: Hardware header length, which means that this is the
 *			  minimum size of a packet.
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
 *
 *	@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()
1431 1432 1433 1434
 *	@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
1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463
 *	@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
 *	@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
 *
1464 1465 1466 1467 1468 1469
 *	@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
 *
1470 1471 1472 1473 1474 1475 1476 1477 1478
 *	@_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
 *
1479 1480
 *	@offload_fwd_mark:	Offload device fwding mark
 *
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 1512 1513 1514 1515 1516 1517 1518
 *	@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
1519 1520
 *	@gso_min_segs:	Minimum number of segments that can be passed to the
 *			NIC for GSO
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534
 *
 *	@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
 *
1535 1536 1537 1538
 *	@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
1539 1540 1541 1542
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

E
Eric Dumazet 已提交
1543
struct net_device {
L
Linus Torvalds 已提交
1544
	char			name[IFNAMSIZ];
1545
	struct hlist_node	name_hlist;
1546
	char 			*ifalias;
L
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1547 1548 1549 1550
	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
1551 1552 1553 1554
	unsigned long		mem_end;
	unsigned long		mem_start;
	unsigned long		base_addr;
	int			irq;
L
Linus Torvalds 已提交
1555

1556 1557
	atomic_t		carrier_changes;

L
Linus Torvalds 已提交
1558
	/*
1559 1560
	 *	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
1561 1562 1563 1564 1565
	 *	part of the usual set specified in Space.c.
	 */

	unsigned long		state;

1566
	struct list_head	dev_list;
1567
	struct list_head	napi_list;
1568
	struct list_head	unreg_list;
1569
	struct list_head	close_list;
1570 1571
	struct list_head	ptype_all;
	struct list_head	ptype_specific;
1572 1573 1574 1575 1576 1577 1578 1579 1580 1581

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

	struct {
		struct list_head upper;
		struct list_head lower;
	} all_adj_list;
1582

1583 1584 1585 1586
	netdev_features_t	features;
	netdev_features_t	hw_features;
	netdev_features_t	wanted_features;
	netdev_features_t	vlan_features;
1587
	netdev_features_t	hw_enc_features;
S
Simon Horman 已提交
1588
	netdev_features_t	mpls_features;
1589

L
Linus Torvalds 已提交
1590
	int			ifindex;
1591
	int			group;
L
Linus Torvalds 已提交
1592

R
Rusty Russell 已提交
1593
	struct net_device_stats	stats;
1594 1595 1596

	atomic_long_t		rx_dropped;
	atomic_long_t		tx_dropped;
L
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1597

1598
#ifdef CONFIG_WIRELESS_EXT
L
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1599 1600
	const struct iw_handler_def *	wireless_handlers;
	struct iw_public_data *	wireless_data;
1601
#endif
1602
	const struct net_device_ops *netdev_ops;
1603
	const struct ethtool_ops *ethtool_ops;
S
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1604
#ifdef CONFIG_NET_SWITCHDEV
J
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1605
	const struct switchdev_ops *switchdev_ops;
S
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1606
#endif
1607 1608 1609
#ifdef CONFIG_NET_L3_MASTER_DEV
	const struct l3mdev_ops	*l3mdev_ops;
#endif
L
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1610

1611 1612
	const struct header_ops *header_ops;

1613 1614 1615
	unsigned int		flags;
	unsigned int		priv_flags;

L
Linus Torvalds 已提交
1616
	unsigned short		gflags;
1617
	unsigned short		padded;
L
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1618

1619 1620
	unsigned char		operstate;
	unsigned char		link_mode;
S
Stefan Rompf 已提交
1621

1622 1623
	unsigned char		if_port;
	unsigned char		dma;
1624

1625 1626 1627
	unsigned int		mtu;
	unsigned short		type;
	unsigned short		hard_header_len;
L
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1628

1629 1630 1631
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

L
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1632
	/* Interface address info. */
1633 1634 1635
	unsigned char		perm_addr[MAX_ADDR_LEN];
	unsigned char		addr_assign_type;
	unsigned char		addr_len;
1636
	unsigned short		neigh_priv_len;
1637 1638
	unsigned short          dev_id;
	unsigned short          dev_port;
J
Jiri Pirko 已提交
1639
	spinlock_t		addr_list_lock;
1640 1641
	unsigned char		name_assign_type;
	bool			uc_promisc;
1642 1643 1644 1645
	struct netdev_hw_addr_list	uc;
	struct netdev_hw_addr_list	mc;
	struct netdev_hw_addr_list	dev_addrs;

1646 1647 1648
#ifdef CONFIG_SYSFS
	struct kset		*queues_kset;
#endif
1649 1650
	unsigned int		promiscuity;
	unsigned int		allmulti;
L
Linus Torvalds 已提交
1651 1652 1653


	/* Protocol specific pointers */
1654

1655
#if IS_ENABLED(CONFIG_VLAN_8021Q)
1656
	struct vlan_info __rcu	*vlan_info;
1657
#endif
1658
#if IS_ENABLED(CONFIG_NET_DSA)
1659
	struct dsa_switch_tree	*dsa_ptr;
1660 1661
#endif
#if IS_ENABLED(CONFIG_TIPC)
1662
	struct tipc_bearer __rcu *tipc_ptr;
1663
#endif
1664 1665 1666 1667 1668 1669
	void 			*atalk_ptr;
	struct in_device __rcu	*ip_ptr;
	struct dn_dev __rcu     *dn_ptr;
	struct inet6_dev __rcu	*ip6_ptr;
	void			*ax25_ptr;
	struct wireless_dev	*ieee80211_ptr;
1670
	struct wpan_dev		*ieee802154_ptr;
R
Robert Shearman 已提交
1671 1672 1673
#if IS_ENABLED(CONFIG_MPLS_ROUTING)
	struct mpls_dev __rcu	*mpls_ptr;
#endif
L
Linus Torvalds 已提交
1674

1675
/*
E
Eric Dumazet 已提交
1676
 * Cache lines mostly used on receive path (including eth_type_trans())
1677
 */
1678
	unsigned long		last_rx;
1679

1680
	/* Interface address info used in eth_type_trans() */
1681
	unsigned char		*dev_addr;
1682

T
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1683

1684
#ifdef CONFIG_SYSFS
T
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1685 1686 1687
	struct netdev_rx_queue	*_rx;

	unsigned int		num_rx_queues;
1688
	unsigned int		real_num_rx_queues;
1689

E
Eric Dumazet 已提交
1690
#endif
T
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1691

1692
	unsigned long		gro_flush_timeout;
1693 1694
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1695

1696
#ifdef CONFIG_NET_CLS_ACT
1697 1698
	struct tcf_proto __rcu  *ingress_cl_list;
#endif
1699
	struct netdev_queue __rcu *ingress_queue;
1700 1701 1702
#ifdef CONFIG_NETFILTER_INGRESS
	struct list_head	nf_hooks_ingress;
#endif
1703

1704
	unsigned char		broadcast[MAX_ADDR_LEN];
1705 1706 1707 1708
#ifdef CONFIG_RFS_ACCEL
	struct cpu_rmap		*rx_cpu_rmap;
#endif
	struct hlist_node	index_hlist;
E
Eric Dumazet 已提交
1709 1710 1711 1712

/*
 * Cache lines mostly used on transmit path
 */
1713 1714
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
	unsigned int		num_tx_queues;
1715
	unsigned int		real_num_tx_queues;
1716
	struct Qdisc		*qdisc;
1717
	unsigned long		tx_queue_len;
1718
	spinlock_t		tx_global_lock;
1719
	int			watchdog_timeo;
E
Eric Dumazet 已提交
1720

T
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1721
#ifdef CONFIG_XPS
E
Eric Dumazet 已提交
1722
	struct xps_dev_maps __rcu *xps_maps;
T
Tom Herbert 已提交
1723
#endif
T
Tom Herbert 已提交
1724

1725 1726 1727 1728
#ifdef CONFIG_NET_SWITCHDEV
	u32			offload_fwd_mark;
#endif

1729
	/* These may be needed for future network-power-down code. */
1730 1731 1732 1733 1734

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1735
	unsigned long		trans_start;
1736 1737 1738

	struct timer_list	watchdog_timer;

E
Eric Dumazet 已提交
1739
	int __percpu		*pcpu_refcnt;
L
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1740 1741
	struct list_head	todo_list;

1742
	struct list_head	link_watch_list;
1743

L
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1744
	enum { NETREG_UNINITIALIZED=0,
1745
	       NETREG_REGISTERED,	/* completed register_netdevice */
L
Linus Torvalds 已提交
1746 1747 1748
	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1749
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1750 1751
	} reg_state:8;

1752
	bool dismantle;
1753 1754 1755 1756 1757

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
L
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1758

1759
	void (*destructor)(struct net_device *dev);
L
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1760 1761

#ifdef CONFIG_NETPOLL
1762
	struct netpoll_info __rcu	*npinfo;
L
Linus Torvalds 已提交
1763
#endif
1764

1765
	possible_net_t			nd_net;
1766

D
David S. Miller 已提交
1767
	/* mid-layer private */
E
Eric Dumazet 已提交
1768
	union {
1769 1770
		void					*ml_priv;
		struct pcpu_lstats __percpu		*lstats;
1771
		struct pcpu_sw_netstats __percpu	*tstats;
1772 1773
		struct pcpu_dstats __percpu		*dstats;
		struct pcpu_vstats __percpu		*vstats;
E
Eric Dumazet 已提交
1774
	};
1775

E
Eric Dumazet 已提交
1776
	struct garp_port __rcu	*garp_port;
1777
	struct mrp_port __rcu	*mrp_port;
L
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1778

1779
	struct device	dev;
1780
	const struct attribute_group *sysfs_groups[4];
1781
	const struct attribute_group *sysfs_rx_queue_group;
P
Patrick McHardy 已提交
1782 1783

	const struct rtnl_link_ops *rtnl_link_ops;
1784

1785 1786 1787
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1788 1789
#define GSO_MAX_SEGS		65535
	u16			gso_max_segs;
1790
	u16			gso_min_segs;
J
Jeff Kirsher 已提交
1791
#ifdef CONFIG_DCB
1792
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1793
#endif
1794 1795 1796
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1797

1798
#if IS_ENABLED(CONFIG_FCOE)
1799
	unsigned int		fcoe_ddp_xid;
1800
#endif
1801
#if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
1802
	struct netprio_map __rcu *priomap;
1803
#endif
1804
	struct phy_device *phydev;
1805
	struct lock_class_key *qdisc_tx_busylock;
1806
	bool proto_down;
L
Linus Torvalds 已提交
1807
};
1808
#define to_net_dev(d) container_of(d, struct net_device, dev)
L
Linus Torvalds 已提交
1809 1810 1811

#define	NETDEV_ALIGN		32

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 1854 1855 1856 1857 1858 1859 1860 1861 1862
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;
}

1863 1864 1865 1866 1867 1868 1869
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	return &dev->_tx[index];
}

1870 1871 1872 1873 1874 1875
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));
}

1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
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);
}

1888
struct netdev_queue *netdev_pick_tx(struct net_device *dev,
1889 1890
				    struct sk_buff *skb,
				    void *accel_priv);
1891

1892 1893 1894 1895 1896 1897
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1898
	return read_pnet(&dev->nd_net);
1899 1900 1901
}

static inline
1902
void dev_net_set(struct net_device *dev, struct net *net)
1903
{
1904
	write_pnet(&dev->nd_net, net);
1905 1906
}

1907
static inline bool netdev_uses_dsa(struct net_device *dev)
1908
{
1909
#if IS_ENABLED(CONFIG_NET_DSA)
1910 1911
	if (dev->dsa_ptr != NULL)
		return dsa_uses_tagged_protocol(dev->dsa_ptr);
1912
#endif
1913
	return false;
1914 1915
}

1916 1917 1918 1919 1920 1921
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1922
static inline void *netdev_priv(const struct net_device *dev)
L
Linus Torvalds 已提交
1923
{
1924
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
L
Linus Torvalds 已提交
1925 1926 1927 1928 1929
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1930
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
L
Linus Torvalds 已提交
1931

1932
/* Set the sysfs device type for the network logical device to allow
1933
 * fine-grained identification of different network device types. For
1934 1935 1936 1937
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

E
Eric Dumazet 已提交
1938 1939 1940 1941 1942
/* Default NAPI poll() weight
 * Device drivers are strongly advised to not use bigger value
 */
#define NAPI_POLL_WEIGHT 64

1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
/**
 *	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.
 */
1953 1954
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1955

E
Eric Dumazet 已提交
1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975
/**
 *	netif_tx_napi_add - initialize a napi context
 *	@dev:  network device
 *	@napi: napi context
 *	@poll: polling function
 *	@weight: default weight
 *
 * This variant of netif_napi_add() should be used from drivers using NAPI
 * to exclusively poll a TX queue.
 * This will avoid we add it into napi_hash[], thus polluting this hash table.
 */
static inline void netif_tx_napi_add(struct net_device *dev,
				     struct napi_struct *napi,
				     int (*poll)(struct napi_struct *, int),
				     int weight)
{
	set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
	netif_napi_add(dev, napi, poll, weight);
}

1976 1977 1978 1979 1980 1981
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1982 1983 1984
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1985 1986 1987
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1988 1989 1990
	/* Length of frag0. */
	unsigned int frag0_len;

1991 1992 1993
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1994
	/* This is non-zero if the packet cannot be merged with the new skb. */
1995 1996 1997 1998
	u16	flush;

	/* Save the IP ID here and check when we get to the transport layer */
	u16	flush_id;
1999 2000

	/* Number of segments aggregated. */
2001 2002
	u16	count;

2003 2004 2005
	/* Start offset for remote checksum offload */
	u16	gro_remcsum_start;

2006 2007
	/* jiffies when first packet was created/queued */
	unsigned long age;
2008

T
Tom Herbert 已提交
2009
	/* Used in ipv6_gro_receive() and foo-over-udp */
2010 2011
	u16	proto;

2012 2013 2014
	/* This is non-zero if the packet may be of the same flow. */
	u8	same_flow:1;

2015
	/* Used in udp_gro_receive */
T
Tom Herbert 已提交
2016 2017 2018 2019 2020
	u8	udp_mark:1;

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

2021 2022
	/* Number of checksums via CHECKSUM_UNNECESSARY */
	u8	csum_cnt:3;
2023

2024 2025 2026 2027 2028
	/* Free the skb? */
	u8	free:2;
#define NAPI_GRO_FREE		  1
#define NAPI_GRO_FREE_STOLEN_HEAD 2

2029 2030 2031
	/* Used in foo-over-udp, set in udp[46]_gro_receive */
	u8	is_ipv6:1;

2032 2033
	/* 7 bit hole */

2034 2035 2036
	/* used to support CHECKSUM_COMPLETE for tunneling protocols */
	__wsum	csum;

2037 2038
	/* used in skb_gro_receive() slow path */
	struct sk_buff *last;
2039 2040 2041
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2042

L
Linus Torvalds 已提交
2043
struct packet_type {
D
David S. Miller 已提交
2044 2045 2046 2047 2048 2049
	__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 *);
2050 2051
	bool			(*id_match)(struct packet_type *ptype,
					    struct sock *sk);
L
Linus Torvalds 已提交
2052 2053 2054 2055
	void			*af_packet_priv;
	struct list_head	list;
};

2056
struct offload_callbacks {
2057
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
2058
						netdev_features_t features);
2059
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
2060
						 struct sk_buff *skb);
2061
	int			(*gro_complete)(struct sk_buff *skb, int nhoff);
2062 2063 2064 2065
};

struct packet_offload {
	__be16			 type;	/* This is really htons(ether_type). */
2066
	u16			 priority;
2067 2068
	struct offload_callbacks callbacks;
	struct list_head	 list;
L
Linus Torvalds 已提交
2069 2070
};

2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
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);
};

2082 2083
struct udp_offload {
	__be16			 port;
T
Tom Herbert 已提交
2084
	u8			 ipproto;
2085
	struct udp_offload_callbacks callbacks;
2086 2087
};

2088 2089 2090 2091 2092 2093 2094 2095 2096
/* 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;
};

2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
#define __netdev_alloc_pcpu_stats(type, gfp)				\
({									\
	typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
	if (pcpu_stats)	{						\
		int __cpu;						\
		for_each_possible_cpu(__cpu) {				\
			typeof(type) *stat;				\
			stat = per_cpu_ptr(pcpu_stats, __cpu);		\
			u64_stats_init(&stat->syncp);			\
		}							\
	}								\
	pcpu_stats;							\
2109 2110
})

2111 2112 2113
#define netdev_alloc_pcpu_stats(type)					\
	__netdev_alloc_pcpu_stats(type, GFP_KERNEL);

2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126
enum netdev_lag_tx_type {
	NETDEV_LAG_TX_TYPE_UNKNOWN,
	NETDEV_LAG_TX_TYPE_RANDOM,
	NETDEV_LAG_TX_TYPE_BROADCAST,
	NETDEV_LAG_TX_TYPE_ROUNDROBIN,
	NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
	NETDEV_LAG_TX_TYPE_HASH,
};

struct netdev_lag_upper_info {
	enum netdev_lag_tx_type tx_type;
};

2127 2128 2129 2130 2131
struct netdev_lag_lower_state_info {
	u8 link_up : 1,
	   tx_enabled : 1;
};

L
Linus Torvalds 已提交
2132 2133
#include <linux/notifier.h>

2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146
/* 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
2147
#define NETDEV_CHANGEMTU	0x0007 /* notify after mtu change happened */
2148 2149 2150 2151 2152 2153 2154 2155 2156
#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
2157
#define NETDEV_UNREGISTER_FINAL 0x0011
2158 2159 2160
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014
2161
#define NETDEV_CHANGEUPPER	0x0015
2162
#define NETDEV_RESEND_IGMP	0x0016
2163
#define NETDEV_PRECHANGEMTU	0x0017 /* notify before mtu change happened */
2164
#define NETDEV_CHANGEINFODATA	0x0018
2165
#define NETDEV_BONDING_INFO	0x0019
2166
#define NETDEV_PRECHANGEUPPER	0x001A
2167
#define NETDEV_CHANGELOWERSTATE	0x001B
2168

2169 2170
int register_netdevice_notifier(struct notifier_block *nb);
int unregister_netdevice_notifier(struct notifier_block *nb);
2171 2172 2173 2174 2175

struct netdev_notifier_info {
	struct net_device *dev;
};

2176 2177 2178 2179 2180
struct netdev_notifier_change_info {
	struct netdev_notifier_info info; /* must be first */
	unsigned int flags_changed;
};

2181 2182 2183 2184 2185
struct netdev_notifier_changeupper_info {
	struct netdev_notifier_info info; /* must be first */
	struct net_device *upper_dev; /* new upper dev */
	bool master; /* is upper dev master */
	bool linking; /* is the nofication for link or unlink */
2186
	void *upper_info; /* upper dev info */
2187 2188
};

2189 2190 2191 2192 2193
struct netdev_notifier_changelowerstate_info {
	struct netdev_notifier_info info; /* must be first */
	void *lower_state_info; /* is lower dev state */
};

2194 2195 2196 2197 2198 2199
static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
					     struct net_device *dev)
{
	info->dev = dev;
}

2200 2201 2202 2203 2204 2205
static inline struct net_device *
netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
{
	return info->dev;
}

2206
int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2207 2208


L
Linus Torvalds 已提交
2209 2210
extern rwlock_t				dev_base_lock;		/* Device list lock */

2211 2212
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2213 2214
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2215 2216
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2217 2218 2219 2220
#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)
2221 2222
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2223 2224
#define for_each_netdev_in_bond_rcu(bond, slave)	\
		for_each_netdev_rcu(&init_net, slave)	\
2225
			if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2226
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
2227

2228 2229 2230 2231 2232
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

2233
	net = dev_net(dev);
2234 2235 2236 2237
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

2238 2239 2240 2241 2242 2243
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
2244
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2245 2246 2247
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

2248 2249 2250 2251 2252
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);
}
2253

E
Eric Dumazet 已提交
2254 2255 2256 2257 2258 2259 2260
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);
}

2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272
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);

2273
int dev_get_iflink(const struct net_device *dev);
2274
int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2275 2276
struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
				      unsigned short mask);
2277 2278 2279 2280 2281 2282
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);
2283
int dev_close_many(struct list_head *head, bool unlink);
2284
void dev_disable_lro(struct net_device *dev);
2285
int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2286
int dev_queue_xmit(struct sk_buff *skb);
2287
int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv);
2288 2289 2290
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);
2291 2292 2293 2294 2295
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

2296 2297
int netdev_refcnt_read(const struct net_device *dev);
void free_netdev(struct net_device *dev);
2298
void netdev_freemem(struct net_device *dev);
2299 2300
void synchronize_net(void);
int init_dummy_netdev(struct net_device *dev);
2301

2302 2303 2304 2305 2306 2307
DECLARE_PER_CPU(int, xmit_recursion);
static inline int dev_recursion_level(void)
{
	return this_cpu_read(xmit_recursion);
}

2308 2309 2310 2311 2312 2313
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);
2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329

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;
}

2330 2331
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
2332
{
2333 2334
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
2335

2336 2337 2338 2339
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
2340

2341 2342 2343
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
2344 2345 2346
	if (!pskb_may_pull(skb, hlen))
		return NULL;

2347 2348
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
2349
	return skb->data + offset;
2350
}
L
Linus Torvalds 已提交
2351

H
Herbert Xu 已提交
2352 2353
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
2354 2355
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
2356 2357
}

2358 2359 2360
static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
					const void *start, unsigned int len)
{
T
Tom Herbert 已提交
2361
	if (NAPI_GRO_CB(skb)->csum_valid)
2362 2363 2364 2365
		NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
						  csum_partial(start, len, 0));
}

T
Tom Herbert 已提交
2366 2367 2368 2369 2370 2371 2372
/* 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);

2373 2374
static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
{
2375
	return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2376 2377
}

T
Tom Herbert 已提交
2378 2379 2380 2381
static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
						      bool zero_okay,
						      __sum16 check)
{
2382 2383 2384
	return ((skb->ip_summed != CHECKSUM_PARTIAL ||
		skb_checksum_start_offset(skb) <
		 skb_gro_offset(skb)) &&
2385
		!skb_at_gro_remcsum_start(skb) &&
2386
		NAPI_GRO_CB(skb)->csum_cnt == 0 &&
T
Tom Herbert 已提交
2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403
		(!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)
{
2404 2405 2406 2407 2408 2409 2410 2411 2412
	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
2413 2414 2415 2416 2417 2418 2419 2420 2421 2422
	}
}

#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));		\
2423 2424 2425
	if (__ret)							\
		__skb_mark_checksum_bad(skb);				\
	else								\
T
Tom Herbert 已提交
2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439
		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)

2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
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)

2460 2461 2462 2463 2464 2465 2466
struct gro_remcsum {
	int offset;
	__wsum delta;
};

static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
{
2467
	grc->offset = 0;
2468 2469 2470
	grc->delta = 0;
}

2471 2472 2473 2474 2475
static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
					    unsigned int off, size_t hdrlen,
					    int start, int offset,
					    struct gro_remcsum *grc,
					    bool nopartial)
2476 2477
{
	__wsum delta;
2478
	size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2479 2480 2481

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

2482
	if (!nopartial) {
2483 2484 2485 2486 2487 2488 2489 2490 2491
		NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
		return ptr;
	}

	ptr = skb_gro_header_fast(skb, off);
	if (skb_gro_header_hard(skb, off + plen)) {
		ptr = skb_gro_header_slow(skb, off + plen, off);
		if (!ptr)
			return NULL;
2492 2493
	}

2494 2495
	delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
			       start, offset);
2496 2497 2498

	/* Adjust skb->csum since we changed the packet */
	NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2499

2500
	grc->offset = off + hdrlen + offset;
2501
	grc->delta = delta;
2502 2503

	return ptr;
2504 2505
}

2506 2507 2508
static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
					   struct gro_remcsum *grc)
{
2509 2510 2511
	void *ptr;
	size_t plen = grc->offset + sizeof(u16);

2512 2513 2514
	if (!grc->delta)
		return;

2515 2516 2517 2518 2519 2520 2521 2522
	ptr = skb_gro_header_fast(skb, grc->offset);
	if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
		ptr = skb_gro_header_slow(skb, plen, grc->offset);
		if (!ptr)
			return;
	}

	remcsum_unadjust((__sum16 *)ptr, grc->delta);
2523
}
2524

2525 2526
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
2527
				  const void *daddr, const void *saddr,
2528
				  unsigned int len)
2529
{
2530
	if (!dev->header_ops || !dev->header_ops->create)
2531
		return 0;
2532 2533

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2534 2535
}

S
Stephen Hemminger 已提交
2536 2537 2538 2539 2540
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

2541
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
2542
		return 0;
2543
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
2544 2545
}

L
Linus Torvalds 已提交
2546
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
2547
int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
L
Linus Torvalds 已提交
2548 2549 2550 2551 2552
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

2553
#ifdef CONFIG_NET_FLOW_LIMIT
2554
#define FLOW_LIMIT_HISTORY	(1 << 7)  /* must be ^2 and !overflow buckets */
2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
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
2566
/*
E
Eric Dumazet 已提交
2567
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
2568
 */
E
Eric Dumazet 已提交
2569
struct softnet_data {
L
Linus Torvalds 已提交
2570
	struct list_head	poll_list;
2571
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
2572

C
Changli Gao 已提交
2573
	/* stats */
2574 2575 2576 2577
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
2578
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
2579
	struct softnet_data	*rps_ipi_list;
E
Eric Dumazet 已提交
2580 2581 2582 2583 2584 2585 2586
#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
2587

E
Eric Dumazet 已提交
2588
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
2589
	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
2590
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
2591 2592
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
2593
	unsigned int		input_queue_head;
2594
	unsigned int		input_queue_tail;
2595
#endif
2596
	unsigned int		dropped;
T
Tom Herbert 已提交
2597
	struct sk_buff_head	input_pkt_queue;
2598
	struct napi_struct	backlog;
2599

L
Linus Torvalds 已提交
2600 2601
};

2602
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
2603 2604
{
#ifdef CONFIG_RPS
2605 2606 2607 2608 2609 2610 2611 2612 2613
	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
2614 2615 2616
#endif
}

T
Tom Herbert 已提交
2617
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
2618

2619
void __netif_schedule(struct Qdisc *q);
2620
void netif_schedule_queue(struct netdev_queue *txq);
2621

2622 2623 2624 2625 2626 2627 2628 2629
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));
}

2630 2631
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
2632
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2633 2634
}

2635 2636 2637 2638 2639 2640
/**
 *	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
2641 2642
static inline void netif_start_queue(struct net_device *dev)
{
2643
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2644 2645
}

2646 2647 2648 2649 2650 2651 2652 2653 2654 2655
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);
	}
}

2656
void netif_tx_wake_queue(struct netdev_queue *dev_queue);
2657

2658 2659 2660 2661 2662 2663 2664
/**
 *	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.
 */
2665 2666
static inline void netif_wake_queue(struct net_device *dev)
{
2667
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2668 2669
}

2670 2671 2672 2673 2674 2675 2676 2677 2678 2679
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);
	}
}

2680 2681
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
2682
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2683 2684
}

2685 2686 2687 2688 2689 2690 2691
/**
 *	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
2692 2693
static inline void netif_stop_queue(struct net_device *dev)
{
2694
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2695 2696
}

2697
void netif_tx_stop_all_queues(struct net_device *dev);
2698

2699
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
2700
{
2701
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
2702 2703
}

2704 2705 2706 2707 2708 2709
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
2710
static inline bool netif_queue_stopped(const struct net_device *dev)
L
Linus Torvalds 已提交
2711
{
2712
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
2713 2714
}

2715
static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
2716
{
2717 2718 2719
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

2720 2721
static inline bool
netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
2722 2723 2724 2725
{
	return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
}

2726 2727 2728 2729 2730 2731
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;
}

2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759
/**
 *	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
}

2760 2761 2762
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
T
Tom Herbert 已提交
2763 2764
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);
2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780

	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
2781
#endif
2782 2783
}

2784 2785 2786 2787 2788 2789 2790 2791 2792
/**
 * 	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
 */
2793 2794 2795 2796 2797 2798
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,
2799
					     unsigned int pkts, unsigned int bytes)
2800
{
T
Tom Herbert 已提交
2801
#ifdef CONFIG_BQL
2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818
	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
2819
#endif
2820 2821
}

2822 2823 2824 2825 2826 2827 2828 2829 2830 2831
/**
 * 	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()
 */
2832
static inline void netdev_completed_queue(struct net_device *dev,
2833
					  unsigned int pkts, unsigned int bytes)
2834 2835 2836 2837 2838 2839
{
	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
2840
#ifdef CONFIG_BQL
2841
	clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
T
Tom Herbert 已提交
2842 2843
	dql_reset(&q->dql);
#endif
2844 2845
}

2846 2847 2848 2849 2850 2851 2852
/**
 * 	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
 */
2853 2854 2855
static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
2856 2857
}

2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877
/**
 * 	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;
}

2878 2879 2880 2881 2882 2883
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
2884
static inline bool netif_running(const struct net_device *dev)
L
Linus Torvalds 已提交
2885 2886 2887 2888
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

2889 2890 2891 2892 2893 2894
/*
 * 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.
 */
2895 2896 2897 2898 2899 2900 2901 2902

/**
 *	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.
 */
2903 2904
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
2905
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2906 2907

	netif_tx_start_queue(txq);
2908 2909
}

2910 2911 2912 2913 2914 2915 2916
/**
 *	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.
 */
2917 2918
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
2919
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2920
	netif_tx_stop_queue(txq);
2921 2922
}

2923 2924 2925 2926 2927 2928 2929
/**
 *	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.
 */
2930 2931
static inline bool __netif_subqueue_stopped(const struct net_device *dev,
					    u16 queue_index)
2932
{
2933
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2934 2935

	return netif_tx_queue_stopped(txq);
2936 2937
}

2938 2939
static inline bool netif_subqueue_stopped(const struct net_device *dev,
					  struct sk_buff *skb)
2940 2941 2942
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
2943

2944
void netif_wake_subqueue(struct net_device *dev, u16 queue_index);
2945

2946
#ifdef CONFIG_XPS
2947
int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
2948
			u16 index);
2949 2950
#else
static inline int netif_set_xps_queue(struct net_device *dev,
2951
				      const struct cpumask *mask,
2952 2953 2954 2955 2956 2957
				      u16 index)
{
	return 0;
}
#endif

J
Jiri Pirko 已提交
2958 2959 2960
u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb,
		  unsigned int num_tx_queues);

2961 2962 2963 2964 2965
/*
 * 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,
2966
			      struct sk_buff *skb)
2967 2968 2969 2970
{
	return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2971 2972 2973 2974 2975 2976
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2977
static inline bool netif_is_multiqueue(const struct net_device *dev)
2978
{
E
Eric Dumazet 已提交
2979
	return dev->num_tx_queues > 1;
2980
}
L
Linus Torvalds 已提交
2981

2982
int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
2983

2984
#ifdef CONFIG_SYSFS
2985
int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
2986 2987 2988 2989 2990 2991 2992 2993
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxq)
{
	return 0;
}
#endif

2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005
#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

3006
#define DEFAULT_MAX_NUM_RSS_QUEUES	(8)
3007
int netif_get_num_default_rss_queues(void);
3008

3009 3010 3011 3012 3013 3014 3015
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
3016

3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034
/*
 * 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
3035
 */
3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054
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
3055

3056 3057
int netif_rx(struct sk_buff *skb);
int netif_rx_ni(struct sk_buff *skb);
3058
int netif_receive_skb(struct sk_buff *skb);
3059 3060 3061 3062
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);
3063 3064
struct packet_offload *gro_find_receive_by_type(__be16 type);
struct packet_offload *gro_find_complete_by_type(__be16 type);
3065 3066 3067 3068 3069 3070 3071

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

3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082
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);
3083 3084
void __dev_notify_flags(struct net_device *, unsigned int old_flags,
			unsigned int gchanges);
3085 3086 3087 3088 3089 3090 3091 3092
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,
3093
			 struct netdev_phys_item_id *ppid);
3094 3095
int dev_get_phys_port_name(struct net_device *dev,
			   char *name, size_t len);
3096
int dev_change_proto_down(struct net_device *dev, bool proto_down);
3097
struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev);
3098 3099
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
3100
int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3101
int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3102
bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb);
L
Linus Torvalds 已提交
3103

3104
extern int		netdev_budget;
L
Linus Torvalds 已提交
3105 3106

/* Called by rtnetlink.c:rtnl_unlock() */
3107
void netdev_run_todo(void);
L
Linus Torvalds 已提交
3108

3109 3110 3111 3112
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
3113
 * Release reference to device to allow it to be freed.
3114
 */
L
Linus Torvalds 已提交
3115 3116
static inline void dev_put(struct net_device *dev)
{
3117
	this_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
3118 3119
}

3120 3121 3122 3123
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
3124
 * Hold reference to device to keep it from being freed.
3125
 */
3126 3127
static inline void dev_hold(struct net_device *dev)
{
3128
	this_cpu_inc(*dev->pcpu_refcnt);
3129
}
L
Linus Torvalds 已提交
3130 3131 3132 3133

/* 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
3134 3135 3136 3137
 *
 * 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
3138 3139
 */

3140 3141 3142
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
3143

3144 3145 3146 3147 3148 3149
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
3150
static inline bool netif_carrier_ok(const struct net_device *dev)
L
Linus Torvalds 已提交
3151 3152 3153 3154
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

3155
unsigned long dev_trans_start(struct net_device *dev);
3156

3157
void __netdev_watchdog_up(struct net_device *dev);
L
Linus Torvalds 已提交
3158

3159
void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
3160

3161
void netif_carrier_off(struct net_device *dev);
L
Linus Torvalds 已提交
3162

3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175
/**
 *	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
3176 3177 3178 3179 3180 3181
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

3182 3183 3184 3185 3186 3187
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
3188 3189 3190 3191 3192 3193
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

3194 3195 3196 3197 3198 3199
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
3200
static inline bool netif_dormant(const struct net_device *dev)
S
Stefan Rompf 已提交
3201 3202 3203 3204 3205
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


3206 3207 3208 3209 3210 3211
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
3212
static inline bool netif_oper_up(const struct net_device *dev)
E
Eric Dumazet 已提交
3213
{
S
Stefan Rompf 已提交
3214 3215 3216 3217
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

3218 3219 3220 3221 3222 3223
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
3224
static inline bool netif_device_present(struct net_device *dev)
L
Linus Torvalds 已提交
3225 3226 3227 3228
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

3229
void netif_device_detach(struct net_device *dev);
L
Linus Torvalds 已提交
3230

3231
void netif_device_attach(struct net_device *dev);
L
Linus Torvalds 已提交
3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281

/*
 * 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;
}

3282
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
3283
{
3284 3285
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
3286 3287
}

3288 3289 3290 3291 3292 3293
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

3294
static inline bool __netif_tx_trylock(struct netdev_queue *txq)
3295
{
3296
	bool ok = spin_trylock(&txq->_xmit_lock);
3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313
	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
3314 3315 3316 3317 3318 3319
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

3320 3321 3322 3323 3324 3325
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
3326 3327
static inline void netif_tx_lock(struct net_device *dev)
{
3328
	unsigned int i;
3329
	int cpu;
3330

3331 3332
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
3333 3334
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3335 3336 3337 3338 3339 3340 3341

		/* 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.
		 */
3342
		__netif_tx_lock(txq, cpu);
3343 3344
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
3345
	}
H
Herbert Xu 已提交
3346 3347 3348 3349
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
3350 3351
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
3352 3353 3354 3355
}

static inline void netif_tx_unlock(struct net_device *dev)
{
3356 3357 3358 3359
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3360

3361 3362 3363 3364 3365
		/* 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);
3366
		netif_schedule_queue(txq);
3367 3368
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
3369 3370 3371 3372
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
3373 3374
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
3375 3376
}

3377
#define HARD_TX_LOCK(dev, txq, cpu) {			\
3378
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
3379
		__netif_tx_lock(txq, cpu);		\
3380 3381 3382
	}						\
}

3383 3384 3385 3386 3387
#define HARD_TX_TRYLOCK(dev, txq)			\
	(((dev->features & NETIF_F_LLTX) == 0) ?	\
		__netif_tx_trylock(txq) :		\
		true )

3388
#define HARD_TX_UNLOCK(dev, txq) {			\
3389
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
3390
		__netif_tx_unlock(txq);			\
3391 3392 3393
	}						\
}

L
Linus Torvalds 已提交
3394 3395
static inline void netif_tx_disable(struct net_device *dev)
{
3396
	unsigned int i;
3397
	int cpu;
3398

3399 3400
	local_bh_disable();
	cpu = smp_processor_id();
3401 3402
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3403 3404

		__netif_tx_lock(txq, cpu);
3405
		netif_tx_stop_queue(txq);
3406
		__netif_tx_unlock(txq);
3407
	}
3408
	local_bh_enable();
L
Linus Torvalds 已提交
3409 3410
}

3411 3412 3413 3414 3415
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

3416 3417
static inline void netif_addr_lock_nested(struct net_device *dev)
{
3418 3419 3420 3421 3422 3423
	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);
3424 3425
}

3426 3427 3428 3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440
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);
}

3441
/*
3442
 * dev_addrs walker. Should be used only for read access. Call with
3443 3444 3445
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
3446
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
3447

L
Linus Torvalds 已提交
3448 3449
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

3450
void ether_setup(struct net_device *dev);
L
Linus Torvalds 已提交
3451 3452

/* Support for loadable net-drivers */
3453
struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
3454
				    unsigned char name_assign_type,
3455 3456
				    void (*setup)(struct net_device *),
				    unsigned int txqs, unsigned int rxqs);
3457 3458
#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
3459

3460 3461 3462
#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
3463

3464 3465
int register_netdev(struct net_device *dev);
void unregister_netdev(struct net_device *dev);
3466

3467
/* General hardware address lists handling functions */
3468 3469 3470 3471
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);
3472 3473 3474 3475 3476 3477 3478 3479 3480
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 *));
3481
void __hw_addr_init(struct netdev_hw_addr_list *list);
3482

3483
/* Functions used for device addresses handling */
3484 3485 3486 3487 3488 3489
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);
3490 3491

/* Functions used for unicast addresses handling */
3492 3493 3494 3495 3496 3497 3498 3499
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);
3500

3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 3518 3519
/**
 *  __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);
}

/**
3520
 *  __dev_uc_unsync - Remove synchronized addresses from device
3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532
 *  @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);
}

3533
/* Functions used for multicast addresses handling */
3534 3535 3536 3537 3538 3539 3540 3541 3542 3543
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);
3544

3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563
/**
 *  __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);
}

/**
3564
 *  __dev_mc_unsync - Remove synchronized addresses from device
3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576
 *  @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);
}

3577
/* Functions used for secondary unicast and multicast support */
3578 3579 3580 3581 3582 3583 3584
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
3585
/* Load a device via the kmod */
3586 3587 3588 3589 3590
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);
3591

L
Linus Torvalds 已提交
3592
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
3593
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
3594
extern int		weight_p;
3595
extern int		bpf_jit_enable;
J
Jiri Pirko 已提交
3596

3597
bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
3598 3599
struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);
3600 3601
struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
						     struct list_head **iter);
3602

3603 3604 3605 3606 3607 3608 3609
/* 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)))

3610
/* iterate through upper list, must be called under RCU read lock */
3611 3612 3613 3614 3615
#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)))
3616

3617 3618 3619 3620
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);
3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633

#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)))

3634 3635 3636 3637 3638 3639 3640 3641
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)))

3642
void *netdev_adjacent_get_private(struct list_head *adj_list);
3643
void *netdev_lower_get_first_private_rcu(struct net_device *dev);
3644 3645 3646 3647
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,
3648
				 struct net_device *upper_dev,
3649
				 void *upper_priv, void *upper_info);
3650 3651
void netdev_upper_dev_unlink(struct net_device *dev,
			     struct net_device *upper_dev);
3652
void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
3653 3654
void *netdev_lower_dev_get_private(struct net_device *dev,
				   struct net_device *lower_dev);
3655 3656
void netdev_lower_state_changed(struct net_device *lower_dev,
				void *lower_state_info);
3657 3658 3659 3660 3661 3662

/* 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);

3663
int dev_get_nest_level(struct net_device *dev,
3664
		       bool (*type_check)(const struct net_device *dev));
3665 3666 3667 3668 3669
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);
3670

3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683
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);

3684 3685 3686 3687 3688
static inline
struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
{
	return __skb_gso_segment(skb, features, true);
}
3689
__be16 skb_network_protocol(struct sk_buff *skb, int *depth);
3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701

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)));
}
3702

3703
#ifdef CONFIG_BUG
3704
void netdev_rx_csum_fault(struct net_device *dev);
3705 3706 3707 3708 3709
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
3710
/* rx skb timestamps */
3711 3712
void net_enable_timestamp(void);
void net_disable_timestamp(void);
L
Linus Torvalds 已提交
3713

3714
#ifdef CONFIG_PROC_FS
3715
int __init dev_proc_init(void);
3716 3717
#else
#define dev_proc_init() 0
3718 3719
#endif

D
David S. Miller 已提交
3720
static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
3721 3722
					      struct sk_buff *skb, struct net_device *dev,
					      bool more)
D
David S. Miller 已提交
3723
{
3724
	skb->xmit_more = more ? 1 : 0;
3725
	return ops->ndo_start_xmit(skb, dev);
D
David S. Miller 已提交
3726 3727
}

3728
static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
3729
					    struct netdev_queue *txq, bool more)
D
David S. Miller 已提交
3730 3731
{
	const struct net_device_ops *ops = dev->netdev_ops;
3732
	int rc;
D
David S. Miller 已提交
3733

3734
	rc = __netdev_start_xmit(ops, skb, dev, more);
3735 3736 3737 3738
	if (rc == NETDEV_TX_OK)
		txq_trans_update(txq);

	return rc;
D
David S. Miller 已提交
3739 3740
}

3741 3742 3743 3744
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);
3745 3746 3747 3748 3749 3750 3751 3752 3753 3754

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);
}
3755

3756 3757
extern struct kobj_ns_type_operations net_ns_type_operations;

3758
const char *netdev_drivername(const struct net_device *dev);
3759

3760
void linkwatch_run_queue(void);
3761

3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775
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;
}

3776 3777
static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
3778 3779 3780
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
3781 3782
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);
3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793

/* 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);
}

3794
int __netdev_update_features(struct net_device *dev);
3795
void netdev_update_features(struct net_device *dev);
3796
void netdev_change_features(struct net_device *dev);
3797

3798 3799 3800
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

3801 3802 3803
netdev_features_t passthru_features_check(struct sk_buff *skb,
					  struct net_device *dev,
					  netdev_features_t features);
3804
netdev_features_t netif_skb_features(struct sk_buff *skb);
3805

3806
static inline bool net_gso_ok(netdev_features_t features, int gso_type)
3807
{
3808
	netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
3809 3810 3811 3812 3813 3814 3815 3816

	/* 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));
3817 3818 3819 3820 3821 3822
	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));
3823
	BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
3824

3825
	return (features & feature) == feature;
3826 3827
}

3828
static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
3829
{
H
Herbert Xu 已提交
3830
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
3831
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
3832 3833
}

3834
static inline bool netif_needs_gso(struct sk_buff *skb,
3835
				   netdev_features_t features)
3836
{
3837
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
3838 3839
		unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
			 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
3840 3841
}

3842 3843 3844 3845 3846 3847
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860
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;
}

3861
static inline bool netif_is_macvlan(const struct net_device *dev)
3862 3863 3864 3865
{
	return dev->priv_flags & IFF_MACVLAN;
}

3866
static inline bool netif_is_macvlan_port(const struct net_device *dev)
3867 3868 3869 3870
{
	return dev->priv_flags & IFF_MACVLAN_PORT;
}

3871
static inline bool netif_is_ipvlan(const struct net_device *dev)
3872 3873 3874 3875
{
	return dev->priv_flags & IFF_IPVLAN_SLAVE;
}

3876
static inline bool netif_is_ipvlan_port(const struct net_device *dev)
3877 3878 3879 3880
{
	return dev->priv_flags & IFF_IPVLAN_MASTER;
}

3881
static inline bool netif_is_bond_master(const struct net_device *dev)
3882 3883 3884 3885
{
	return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
}

3886
static inline bool netif_is_bond_slave(const struct net_device *dev)
J
Jiri Pirko 已提交
3887 3888 3889 3890
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

3891 3892 3893 3894 3895
static inline bool netif_supports_nofcs(struct net_device *dev)
{
	return dev->priv_flags & IFF_SUPP_NOFCS;
}

3896
static inline bool netif_is_l3_master(const struct net_device *dev)
3897
{
3898
	return dev->priv_flags & IFF_L3MDEV_MASTER;
3899 3900
}

D
David Ahern 已提交
3901 3902 3903 3904 3905
static inline bool netif_is_l3_slave(const struct net_device *dev)
{
	return dev->priv_flags & IFF_L3MDEV_SLAVE;
}

3906 3907 3908 3909 3910
static inline bool netif_is_bridge_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_EBRIDGE;
}

3911 3912 3913 3914 3915
static inline bool netif_is_bridge_port(const struct net_device *dev)
{
	return dev->priv_flags & IFF_BRIDGE_PORT;
}

3916 3917 3918 3919 3920
static inline bool netif_is_ovs_master(const struct net_device *dev)
{
	return dev->priv_flags & IFF_OPENVSWITCH;
}

3921
static inline bool netif_is_team_master(const struct net_device *dev)
J
Jiri Pirko 已提交
3922 3923 3924 3925
{
	return dev->priv_flags & IFF_TEAM;
}

3926
static inline bool netif_is_team_port(const struct net_device *dev)
J
Jiri Pirko 已提交
3927 3928 3929 3930
{
	return dev->priv_flags & IFF_TEAM_PORT;
}

3931
static inline bool netif_is_lag_master(const struct net_device *dev)
J
Jiri Pirko 已提交
3932 3933 3934 3935
{
	return netif_is_bond_master(dev) || netif_is_team_master(dev);
}

3936
static inline bool netif_is_lag_port(const struct net_device *dev)
J
Jiri Pirko 已提交
3937 3938 3939 3940
{
	return netif_is_bond_slave(dev) || netif_is_team_port(dev);
}

3941 3942 3943 3944 3945 3946
/* 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);
}

3947
extern struct pernet_operations __net_initdata loopback_net_ops;
3948

3949 3950 3951 3952 3953 3954
/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* netdev_printk helpers, similar to dev_printk */

static inline const char *netdev_name(const struct net_device *dev)
{
3955 3956
	if (!dev->name[0] || strchr(dev->name, '%'))
		return "(unnamed net_device)";
3957 3958 3959
	return dev->name;
}

3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974
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)";
}

3975
__printf(3, 4)
3976 3977
void netdev_printk(const char *level, const struct net_device *dev,
		   const char *format, ...);
3978
__printf(2, 3)
3979
void netdev_emerg(const struct net_device *dev, const char *format, ...);
3980
__printf(2, 3)
3981
void netdev_alert(const struct net_device *dev, const char *format, ...);
3982
__printf(2, 3)
3983
void netdev_crit(const struct net_device *dev, const char *format, ...);
3984
__printf(2, 3)
3985
void netdev_err(const struct net_device *dev, const char *format, ...);
3986
__printf(2, 3)
3987
void netdev_warn(const struct net_device *dev, const char *format, ...);
3988
__printf(2, 3)
3989
void netdev_notice(const struct net_device *dev, const char *format, ...);
3990
__printf(2, 3)
3991
void netdev_info(const struct net_device *dev, const char *format, ...);
3992

3993 3994 3995
#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

3996
#if defined(CONFIG_DYNAMIC_DEBUG)
3997 3998
#define netdev_dbg(__dev, format, args...)			\
do {								\
3999
	dynamic_netdev_dbg(__dev, format, ##args);		\
4000
} while (0)
4001 4002 4003
#elif defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
4004 4005 4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029
#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...)			\
4030 4031
	WARN(1, "netdevice: %s%s\n" format, netdev_name(dev),	\
	     netdev_reg_state(dev), ##args)
4032

4033 4034 4035 4036 4037 4038 4039 4040
/* 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)

4041 4042 4043 4044 4045 4046
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

4047
#define netif_emerg(priv, type, dev, fmt, args...)		\
4048
	netif_level(emerg, priv, type, dev, fmt, ##args)
4049
#define netif_alert(priv, type, dev, fmt, args...)		\
4050
	netif_level(alert, priv, type, dev, fmt, ##args)
4051
#define netif_crit(priv, type, dev, fmt, args...)		\
4052
	netif_level(crit, priv, type, dev, fmt, ##args)
4053
#define netif_err(priv, type, dev, fmt, args...)		\
4054
	netif_level(err, priv, type, dev, fmt, ##args)
4055
#define netif_warn(priv, type, dev, fmt, args...)		\
4056
	netif_level(warn, priv, type, dev, fmt, ##args)
4057
#define netif_notice(priv, type, dev, fmt, args...)		\
4058
	netif_level(notice, priv, type, dev, fmt, ##args)
4059
#define netif_info(priv, type, dev, fmt, args...)		\
4060
	netif_level(info, priv, type, dev, fmt, ##args)
4061

4062
#if defined(CONFIG_DYNAMIC_DEBUG)
4063 4064 4065
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
4066
		dynamic_netdev_dbg(netdev, format, ##args);	\
4067
} while (0)
4068 4069 4070
#elif defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4071 4072 4073 4074 4075 4076 4077 4078 4079 4080
#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)
4081
#define netif_vdbg	netif_dbg
4082 4083 4084 4085
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
4086
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4087 4088 4089
	0;							\
})
#endif
4090

4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120
/*
 *	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)

4121
#endif	/* _LINUX_NETDEVICE_H */