netdevice.h 83.8 KB
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/*
 * INET		An implementation of the TCP/IP protocol suite for the LINUX
 *		operating system.  INET is implemented using the  BSD Socket
 *		interface as the means of communication with the user level.
 *
 *		Definitions for the Interfaces handler.
 *
 * Version:	@(#)dev.h	1.0.10	08/12/93
 *
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 * Authors:	Ross Biro
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 *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
 *		Corey Minyard <wf-rch!minyard@relay.EU.net>
 *		Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
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 *		Alan Cox, <alan@lxorguk.ukuu.org.uk>
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 *		Bjorn Ekwall. <bj0rn@blox.se>
 *              Pekka Riikonen <priikone@poseidon.pspt.fi>
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 *		Moved to /usr/include/linux for NET3
 */
#ifndef _LINUX_NETDEVICE_H
#define _LINUX_NETDEVICE_H

#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
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#include <linux/if_link.h>
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#ifdef __KERNEL__
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#include <linux/pm_qos.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/atomic.h>
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#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/device.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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struct netpoll_info;
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struct phy_device;
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/* 802.11 specific */
struct wireless_dev;
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					/* source back-compat hooks */
#define SET_ETHTOOL_OPS(netdev,ops) \
	( (netdev)->ethtool_ops = (ops) )

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/* hardware address assignment types */
#define NET_ADDR_PERM		0	/* address is permanent (default) */
#define NET_ADDR_RANDOM		1	/* address is generated randomly */
#define NET_ADDR_STOLEN		2	/* address is stolen from other device */

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/* 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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#endif

#define MAX_ADDR_LEN	32		/* Largest hardware address length */

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/* Initial net device group. All devices belong to group 0 by default. */
#define INIT_NETDEV_GROUP	0

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#ifdef  __KERNEL__
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/*
 *	Compute the worst case header length according to the protocols
 *	used.
 */
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#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
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# if defined(CONFIG_MAC80211_MESH)
#  define LL_MAX_HEADER 128
# else
#  define LL_MAX_HEADER 96
# endif
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#elif IS_ENABLED(CONFIG_TR)
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# define LL_MAX_HEADER 48
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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;
};

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#endif  /*  __KERNEL__  */

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/* Media selection options. */
enum {
        IF_PORT_UNKNOWN = 0,
        IF_PORT_10BASE2,
        IF_PORT_10BASET,
        IF_PORT_AUI,
        IF_PORT_100BASET,
        IF_PORT_100BASETX,
        IF_PORT_100BASEFX
};

#ifdef __KERNEL__

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

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#ifdef CONFIG_RPS
#include <linux/jump_label.h>
extern struct jump_label_key rps_needed;
#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
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	bool			synced;
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	bool			global_use;
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	int			refcount;
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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,
			   const void *saddr, unsigned len);
	int	(*parse)(const struct sk_buff *skb, unsigned char *haddr);
	int	(*rebuild)(struct sk_buff *skb);
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	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
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	void	(*cache_update)(struct hh_cache *hh,
				const struct net_device *dev,
				const unsigned char *haddr);
};

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

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


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

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

	unsigned long		state;
	int			weight;
	int			(*poll)(struct napi_struct *, int);
#ifdef CONFIG_NETPOLL
	spinlock_t		poll_lock;
	int			poll_owner;
#endif
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	unsigned int		gro_count;

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	struct net_device	*dev;
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	struct list_head	dev_list;
	struct sk_buff		*gro_list;
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	struct sk_buff		*skb;
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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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};

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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
 * are registred on exact device (ptype->dev == skb->dev).
 *
 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
 * delivered, it should return RX_HANDLER_PASS.
 *
 * A device without a registered rx_handler will behave as if rx_handler
 * returned RX_HANDLER_PASS.
 */

enum rx_handler_result {
	RX_HANDLER_CONSUMED,
	RX_HANDLER_ANOTHER,
	RX_HANDLER_EXACT,
	RX_HANDLER_PASS,
};
typedef enum rx_handler_result rx_handler_result_t;
typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
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extern void __napi_schedule(struct napi_struct *n);
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static inline int napi_disable_pending(struct napi_struct *n)
{
	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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 */
static inline int napi_schedule_prep(struct napi_struct *n)
{
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	return !napi_disable_pending(n) &&
		!test_and_set_bit(NAPI_STATE_SCHED, &n->state);
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}

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

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/* Try to reschedule poll. Called by dev->poll() after napi_complete().  */
static inline int napi_reschedule(struct napi_struct *napi)
{
	if (napi_schedule_prep(napi)) {
		__napi_schedule(napi);
		return 1;
	}
	return 0;
}

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

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

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

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enum netdev_queue_state_t {
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	__QUEUE_STATE_DRV_XOFF,
	__QUEUE_STATE_STACK_XOFF,
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	__QUEUE_STATE_FROZEN,
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#define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF)		| \
			      (1 << __QUEUE_STATE_STACK_XOFF))
#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF		| \
					(1 << __QUEUE_STATE_FROZEN))
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};
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/*
 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue.  The
 * netif_tx_* functions below are used to manipulate this flag.  The
 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
 * queue independently.  The netif_xmit_*stopped functions below are called
 * to check if the queue has been stopped by the driver or stack (either
 * of the XOFF bits are set in the state).  Drivers should not need to call
 * netif_xmit*stopped functions, they should only be using netif_tx_*.
 */
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struct netdev_queue {
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/*
 * read mostly part
 */
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	struct net_device	*dev;
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	struct Qdisc		*qdisc;
	struct Qdisc		*qdisc_sleeping;
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#ifdef CONFIG_SYSFS
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	struct kobject		kobj;
#endif
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#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
	int			numa_node;
#endif
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/*
 * write mostly part
 */
	spinlock_t		_xmit_lock ____cacheline_aligned_in_smp;
	int			xmit_lock_owner;
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	/*
	 * please use this field instead of dev->trans_start
	 */
	unsigned long		trans_start;
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	/*
	 * Number of TX timeouts for this queue
	 * (/sys/class/net/DEV/Q/trans_timeout)
	 */
	unsigned long		trans_timeout;
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	unsigned long		state;

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

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

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#ifdef CONFIG_RPS
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/*
 * This structure holds an RPS map which can be of variable length.  The
 * map is an array of CPUs.
 */
struct rps_map {
	unsigned int len;
	struct rcu_head rcu;
	u16 cpus[0];
};
600
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
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/*
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 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
 * tail pointer for that CPU's input queue at the time of last enqueue, and
 * a hardware filter index.
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 */
struct rps_dev_flow {
	u16 cpu;
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	u16 filter;
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	unsigned int last_qtail;
};
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#define RPS_NO_FILTER 0xffff
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/*
 * The rps_dev_flow_table structure contains a table of flow mappings.
 */
struct rps_dev_flow_table {
	unsigned int mask;
	struct rcu_head rcu;
	struct work_struct free_work;
	struct rps_dev_flow flows[0];
};
#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
624
    ((_num) * sizeof(struct rps_dev_flow)))
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/*
 * The rps_sock_flow_table contains mappings of flows to the last CPU
 * on which they were processed by the application (set in recvmsg).
 */
struct rps_sock_flow_table {
	unsigned int mask;
	u16 ents[0];
};
#define	RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
635
    ((_num) * sizeof(u16)))
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#define RPS_NO_CPU 0xffff

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

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

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

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

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

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/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
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	struct rps_map __rcu		*rps_map;
	struct rps_dev_flow_table __rcu	*rps_flow_table;
	struct kobject			kobj;
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	struct net_device		*dev;
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} ____cacheline_aligned_in_smp;
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#endif /* CONFIG_RPS */
675

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#ifdef CONFIG_XPS
/*
 * This structure holds an XPS map which can be of variable length.  The
 * map is an array of queues.
 */
struct xps_map {
	unsigned int len;
	unsigned int alloc_len;
	struct rcu_head rcu;
	u16 queues[0];
};
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#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
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#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map))	\
    / sizeof(u16))

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

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

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

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/*
 * This structure defines the management hooks for network devices.
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 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
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 *
 * int (*ndo_init)(struct net_device *dev);
 *     This function is called once when network device is registered.
 *     The network device can use this to any late stage initializaton
 *     or semantic validattion. It can fail with an error code which will
 *     be propogated back to register_netdev
 *
 * void (*ndo_uninit)(struct net_device *dev);
 *     This function is called when device is unregistered or when registration
 *     fails. It is not called if init fails.
 *
 * int (*ndo_open)(struct net_device *dev);
 *     This function is called when network device transistions to the up
 *     state.
 *
 * int (*ndo_stop)(struct net_device *dev);
 *     This function is called when network device transistions to the down
 *     state.
 *
750 751
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
752
 *	Called when a packet needs to be transmitted.
753 754
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
755 756 757 758 759 760
 *	Required can not be NULL.
 *
 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
 *	Called to decide which queue to when device supports multiple
 *	transmit queues.
 *
761 762 763 764 765 766
 * 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.
767 768
 *	If driver handles unicast address filtering, it should set
 *	IFF_UNICAST_FLT to its priv_flags.
769 770 771
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
772
 *	needs to be changed. If this interface is not defined, the
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792
 *	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.
 *
793
 * void (*ndo_tx_timeout)(struct net_device *dev);
794 795 796
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
797
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
798
 *                      struct rtnl_link_stats64 *storage);
799
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
800
 *	Called when a user wants to get the network device usage
801
 *	statistics. Drivers must do one of the following:
802 803
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
804
 *	2. Define @ndo_get_stats to update a net_device_stats structure
805 806 807 808 809
 *	   (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.
810
 *
811
 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
812 813 814
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is registered.
 *
815
 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
816 817 818 819
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is unregistered.
 *
 * void (*ndo_poll_controller)(struct net_device *dev);
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 *
 *	SR-IOV management functions.
 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
825
 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
826 827
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
828 829 830
 * 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);
831 832 833 834 835
 * 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.
836
 *
837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866
 *	Fiber Channel over Ethernet (FCoE) offload functions.
 * int (*ndo_fcoe_enable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to start using LLD for FCoE
 *	so the underlying device can perform whatever needed configuration or
 *	initialization to support acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_disable)(struct net_device *dev);
 *	Called when the FCoE protocol stack wants to stop using LLD for FCoE
 *	so the underlying device can perform whatever needed clean-ups to
 *	stop supporting acceleration of FCoE traffic.
 *
 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
 *			     struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Initiator wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
 * int (*ndo_fcoe_ddp_done)(struct net_device *dev,  u16 xid);
 *	Called when the FCoE Initiator/Target is done with the DDPed I/O as
 *	indicated by the FC exchange id 'xid', so the underlying device can
 *	clean up and reuse resources for later DDP requests.
 *
 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
 *			      struct scatterlist *sgl, unsigned int sgc);
 *	Called when the FCoE Target wants to initialize an I/O that
 *	is a possible candidate for Direct Data Placement (DDP). The LLD can
 *	perform necessary setup and returns 1 to indicate the device is set up
 *	successfully to perform DDP on this I/O, otherwise this returns 0.
 *
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 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
 *			       struct netdev_fcoe_hbainfo *hbainfo);
 *	Called when the FCoE Protocol stack wants information on the underlying
 *	device. This information is utilized by the FCoE protocol stack to
 *	register attributes with Fiber Channel management service as per the
 *	FC-GS Fabric Device Management Information(FDMI) specification.
 *
874 875 876 877 878 879
 * 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.
 *
880 881 882 883 884 885
 *	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.
886 887 888 889 890 891 892 893
 *
 *	Slave management functions (for bridge, bonding, etc). User should
 *	call netdev_set_master() to set dev->master properly.
 * 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.
894 895
 *
 *      Feature/offload setting functions.
896 897
 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
 *		netdev_features_t features);
898 899 900 901
 *	Adjusts the requested feature flags according to device-specific
 *	constraints, and returns the resulting flags. Must not modify
 *	the device state.
 *
902
 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
903 904 905 906
 *	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.
 *
907 908 909 910 911 912
 */
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);
913
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
914 915 916
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
917 918 919 920 921 922 923 924 925 926
	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);
927 928 929 930
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
931 932
	void			(*ndo_tx_timeout) (struct net_device *dev);

933 934
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
935 936
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

937
	int			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
938
						       unsigned short vid);
939
	int			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
940 941 942
						        unsigned short vid);
#ifdef CONFIG_NET_POLL_CONTROLLER
	void                    (*ndo_poll_controller)(struct net_device *dev);
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	int			(*ndo_netpoll_setup)(struct net_device *dev,
						     struct netpoll_info *info);
945
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
946
#endif
947 948 949 950 951 952
	int			(*ndo_set_vf_mac)(struct net_device *dev,
						  int queue, u8 *mac);
	int			(*ndo_set_vf_vlan)(struct net_device *dev,
						   int queue, u16 vlan, u8 qos);
	int			(*ndo_set_vf_tx_rate)(struct net_device *dev,
						      int vf, int rate);
953 954
	int			(*ndo_set_vf_spoofchk)(struct net_device *dev,
						       int vf, bool setting);
955 956 957
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
958 959 960 961 962
	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);
963
	int			(*ndo_setup_tc)(struct net_device *dev, u8 tc);
964
#if IS_ENABLED(CONFIG_FCOE)
965 966
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
967 968 969 970 971 972
	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);
973 974 975 976
	int			(*ndo_fcoe_ddp_target)(struct net_device *dev,
						       u16 xid,
						       struct scatterlist *sgl,
						       unsigned int sgc);
977 978
	int			(*ndo_fcoe_get_hbainfo)(struct net_device *dev,
							struct netdev_fcoe_hbainfo *hbainfo);
979 980
#endif

981
#if IS_ENABLED(CONFIG_LIBFCOE)
982 983 984 985
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
986
#endif
987

988 989 990 991 992 993
#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
994 995 996 997
	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);
998 999
	netdev_features_t	(*ndo_fix_features)(struct net_device *dev,
						    netdev_features_t features);
1000
	int			(*ndo_set_features)(struct net_device *dev,
1001
						    netdev_features_t features);
1002
	int			(*ndo_neigh_construct)(struct neighbour *n);
1003
	void			(*ndo_neigh_destroy)(struct neighbour *n);
1004 1005
};

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/*
 *	The DEVICE structure.
 *	Actually, this whole structure is a big mistake.  It mixes I/O
 *	data with strictly "high-level" data, and it has to know about
 *	almost every data structure used in the INET module.
 *
 *	FIXME: cleanup struct net_device such that network protocol info
 *	moves out.
 */

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struct net_device {
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	/*
	 * 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
1021
	 * of the interface.
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	 */
	char			name[IFNAMSIZ];
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	struct pm_qos_request	pm_qos_req;
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1027 1028
	/* device name hash chain */
	struct hlist_node	name_hlist;
1029 1030
	/* snmp alias */
	char 			*ifalias;
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	/*
	 *	I/O specific fields
	 *	FIXME: Merge these and struct ifmap into one
	 */
	unsigned long		mem_end;	/* shared mem end	*/
	unsigned long		mem_start;	/* shared mem start	*/
	unsigned long		base_addr;	/* device I/O address	*/
	unsigned int		irq;		/* device IRQ number	*/

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

	unsigned long		state;

1048
	struct list_head	dev_list;
1049
	struct list_head	napi_list;
1050
	struct list_head	unreg_list;
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1052
	/* currently active device features */
1053
	netdev_features_t	features;
1054
	/* user-changeable features */
1055
	netdev_features_t	hw_features;
1056
	/* user-requested features */
1057
	netdev_features_t	wanted_features;
1058
	/* mask of features inheritable by VLAN devices */
1059
	netdev_features_t	vlan_features;
1060

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	/* Interface index. Unique device identifier	*/
	int			ifindex;
	int			iflink;

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	struct net_device_stats	stats;
1066 1067 1068
	atomic_long_t		rx_dropped; /* dropped packets by core network
					     * Do not use this in drivers.
					     */
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1070
#ifdef CONFIG_WIRELESS_EXT
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	/* List of functions to handle Wireless Extensions (instead of ioctl).
	 * See <net/iw_handler.h> for details. Jean II */
	const struct iw_handler_def *	wireless_handlers;
	/* Instance data managed by the core of Wireless Extensions. */
	struct iw_public_data *	wireless_data;
1076
#endif
1077 1078
	/* Management operations */
	const struct net_device_ops *netdev_ops;
1079
	const struct ethtool_ops *ethtool_ops;
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1081 1082 1083
	/* Hardware header description */
	const struct header_ops *header_ops;

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1084
	unsigned int		flags;	/* interface flags (a la BSD)	*/
1085
	unsigned int		priv_flags; /* Like 'flags' but invisible to userspace. */
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1086 1087 1088
	unsigned short		gflags;
	unsigned short		padded;	/* How much padding added by alloc_netdev() */

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1089 1090 1091
	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

1092 1093 1094
	unsigned char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

1095
	unsigned int		mtu;	/* interface MTU value		*/
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1096 1097 1098
	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

1099 1100 1101 1102 1103 1104 1105
	/* extra head- and tailroom the hardware may need, but not in all cases
	 * can this be guaranteed, especially tailroom. Some cases also use
	 * LL_MAX_HEADER instead to allocate the skb.
	 */
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

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1106
	/* Interface address info. */
1107
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1108
	unsigned char		addr_assign_type; /* hw address assignment type */
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1109
	unsigned char		addr_len;	/* hardware address length	*/
1110
	unsigned char		neigh_priv_len;
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1111 1112
	unsigned short          dev_id;		/* for shared network cards */

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1113
	spinlock_t		addr_list_lock;
1114 1115
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
1116
	bool			uc_promisc;
1117 1118
	unsigned int		promiscuity;
	unsigned int		allmulti;
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1119 1120 1121


	/* Protocol specific pointers */
1122

1123
#if IS_ENABLED(CONFIG_VLAN_8021Q)
1124
	struct vlan_info __rcu	*vlan_info;	/* VLAN info */
1125
#endif
1126
#if IS_ENABLED(CONFIG_NET_DSA)
1127
	struct dsa_switch_tree	*dsa_ptr;	/* dsa specific data */
1128
#endif
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	void 			*atalk_ptr;	/* AppleTalk link 	*/
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1130
	struct in_device __rcu	*ip_ptr;	/* IPv4 specific data	*/
1131
	struct dn_dev __rcu     *dn_ptr;        /* DECnet specific data */
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1132
	struct inet6_dev __rcu	*ip6_ptr;       /* IPv6 specific data */
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1133 1134
	void			*ec_ptr;	/* Econet specific data	*/
	void			*ax25_ptr;	/* AX.25 specific data */
1135 1136
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
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1138
/*
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1139
 * Cache lines mostly used on receive path (including eth_type_trans())
1140
 */
1141 1142 1143 1144 1145 1146 1147 1148
	unsigned long		last_rx;	/* Time of last Rx
						 * This should not be set in
						 * drivers, unless really needed,
						 * because network stack (bonding)
						 * use it if/when necessary, to
						 * avoid dirtying this cache line.
						 */

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	struct net_device	*master; /* Pointer to master device of a group,
					  * which this device is member of.
					  */

1153
	/* Interface address info used in eth_type_trans() */
1154 1155 1156 1157
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

1158 1159
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						      hw addresses */
1160 1161

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
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1162

1163
#ifdef CONFIG_SYSFS
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1164
	struct kset		*queues_kset;
1165
#endif
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1166

1167
#ifdef CONFIG_RPS
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1168 1169
	struct netdev_rx_queue	*_rx;

1170
	/* Number of RX queues allocated at register_netdev() time */
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1171
	unsigned int		num_rx_queues;
1172 1173 1174

	/* Number of RX queues currently active in device */
	unsigned int		real_num_rx_queues;
1175 1176 1177 1178 1179 1180 1181

#ifdef CONFIG_RFS_ACCEL
	/* CPU reverse-mapping for RX completion interrupts, indexed
	 * by RX queue number.  Assigned by driver.  This must only be
	 * set if the ndo_rx_flow_steer operation is defined. */
	struct cpu_rmap		*rx_cpu_rmap;
#endif
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1182
#endif
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1183

1184 1185
	rx_handler_func_t __rcu	*rx_handler;
	void __rcu		*rx_handler_data;
1186

1187
	struct netdev_queue __rcu *ingress_queue;
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1188 1189 1190 1191

/*
 * Cache lines mostly used on transmit path
 */
1192
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
1193 1194

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
1195
	unsigned int		num_tx_queues;
1196 1197 1198 1199

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

1200 1201 1202
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

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1203
	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
1204
	spinlock_t		tx_global_lock;
E
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1205

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1206
#ifdef CONFIG_XPS
E
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1207
	struct xps_dev_maps __rcu *xps_maps;
T
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1208
#endif
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1209

1210
	/* These may be needed for future network-power-down code. */
1211 1212 1213 1214 1215

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1216 1217 1218 1219 1220
	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/

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

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1221
	/* Number of references to this device */
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1222
	int __percpu		*pcpu_refcnt;
1223

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1224 1225 1226 1227 1228
	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

1229
	struct list_head	link_watch_list;
1230

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1231 1232
	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1233
	       NETREG_REGISTERED,	/* completed register_netdevice */
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	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1237
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1238 1239 1240
	} reg_state:8;

	bool dismantle; /* device is going do be freed */
1241 1242 1243 1244 1245

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
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1246

1247 1248
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
L
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1249 1250

#ifdef CONFIG_NETPOLL
1251
	struct netpoll_info	*npinfo;
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1252
#endif
1253

1254
#ifdef CONFIG_NET_NS
1255 1256
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1257
#endif
1258

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1259
	/* mid-layer private */
E
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1260 1261 1262
	union {
		void				*ml_priv;
		struct pcpu_lstats __percpu	*lstats; /* loopback stats */
1263
		struct pcpu_tstats __percpu	*tstats; /* tunnel stats */
1264
		struct pcpu_dstats __percpu	*dstats; /* dummy stats */
E
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1265
	};
1266
	/* GARP */
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1267
	struct garp_port __rcu	*garp_port;
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1268 1269

	/* class/net/name entry */
1270
	struct device		dev;
1271 1272
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
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1273 1274 1275

	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1276

1277 1278 1279
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1280

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1281
#ifdef CONFIG_DCB
1282
	/* Data Center Bridging netlink ops */
1283
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1284
#endif
1285 1286 1287
	u8 num_tc;
	struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
	u8 prio_tc_map[TC_BITMASK + 1];
1288

1289
#if IS_ENABLED(CONFIG_FCOE)
1290 1291
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
1292 1293 1294
#endif
#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
	struct netprio_map __rcu *priomap;
1295
#endif
1296 1297
	/* phy device may attach itself for hardware timestamping */
	struct phy_device *phydev;
1298 1299 1300

	/* group the device belongs to */
	int group;
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};
1302
#define to_net_dev(d) container_of(d, struct net_device, dev)
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#define	NETDEV_ALIGN		32

1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356
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;
}

1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
static inline
struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
					 unsigned int index)
{
	return &dev->_tx[index];
}

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

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

1376 1377 1378 1379 1380 1381
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
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	return read_pnet(&dev->nd_net);
1383 1384 1385
}

static inline
1386
void dev_net_set(struct net_device *dev, struct net *net)
1387 1388
{
#ifdef CONFIG_NET_NS
1389 1390
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1391 1392 1393
#endif
}

1394 1395 1396 1397 1398 1399 1400 1401 1402 1403
static inline bool netdev_uses_dsa_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_DSA
	if (dev->dsa_ptr != NULL)
		return dsa_uses_dsa_tags(dev->dsa_ptr);
#endif

	return 0;
}

1404 1405 1406 1407 1408 1409 1410 1411 1412
#ifndef CONFIG_NET_NS
static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
{
	skb->dev = dev;
}
#else /* CONFIG_NET_NS */
void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
#endif

1413 1414 1415 1416 1417 1418 1419 1420 1421 1422
static inline bool netdev_uses_trailer_tags(struct net_device *dev)
{
#ifdef CONFIG_NET_DSA_TAG_TRAILER
	if (dev->dsa_ptr != NULL)
		return dsa_uses_trailer_tags(dev->dsa_ptr);
#endif

	return 0;
}

1423 1424 1425 1426 1427 1428
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1429
static inline void *netdev_priv(const struct net_device *dev)
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1430
{
1431
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
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1432 1433 1434 1435 1436
}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1437
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
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1439 1440 1441 1442 1443 1444
/* Set the sysfs device type for the network logical device to allow
 * fin grained indentification of different network device types. For
 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
 */
#define SET_NETDEV_DEVTYPE(net, devtype)	((net)->dev.type = (devtype))

1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
/**
 *	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.
 */
1455 1456
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1457

1458 1459 1460 1461 1462 1463
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1464 1465 1466
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1467 1468 1469
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1470 1471 1472
	/* Length of frag0. */
	unsigned int frag0_len;

1473 1474 1475
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1476 1477 1478 1479 1480 1481 1482 1483
	/* This is non-zero if the packet may be of the same flow. */
	int same_flow;

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

	/* Number of segments aggregated. */
	int count;
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1484 1485 1486

	/* Free the skb? */
	int free;
1487 1488 1489
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1490

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1491
struct packet_type {
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1492 1493 1494 1495 1496 1497
	__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 *);
1498
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
1499
						netdev_features_t features);
1500
	int			(*gso_send_check)(struct sk_buff *skb);
1501 1502 1503
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
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1504 1505 1506 1507 1508 1509
	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/notifier.h>

1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
/* netdevice notifier chain. Please remember to update the rtnetlink
 * notification exclusion list in rtnetlink_event() when adding new
 * types.
 */
#define NETDEV_UP	0x0001	/* For now you can't veto a device up/down */
#define NETDEV_DOWN	0x0002
#define NETDEV_REBOOT	0x0003	/* Tell a protocol stack a network interface
				   detected a hardware crash and restarted
				   - we can use this eg to kick tcp sessions
				   once done */
#define NETDEV_CHANGE	0x0004	/* Notify device state change */
#define NETDEV_REGISTER 0x0005
#define NETDEV_UNREGISTER	0x0006
#define NETDEV_CHANGEMTU	0x0007
#define NETDEV_CHANGEADDR	0x0008
#define NETDEV_GOING_DOWN	0x0009
#define NETDEV_CHANGENAME	0x000A
#define NETDEV_FEAT_CHANGE	0x000B
#define NETDEV_BONDING_FAILOVER 0x000C
#define NETDEV_PRE_UP		0x000D
#define NETDEV_PRE_TYPE_CHANGE	0x000E
#define NETDEV_POST_TYPE_CHANGE	0x000F
#define NETDEV_POST_INIT	0x0010
#define NETDEV_UNREGISTER_BATCH 0x0011
#define NETDEV_RELEASE		0x0012
#define NETDEV_NOTIFY_PEERS	0x0013
#define NETDEV_JOIN		0x0014

extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);


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extern rwlock_t				dev_base_lock;		/* Device list lock */

1545

1546 1547
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1548 1549
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1550 1551
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1552 1553 1554 1555
#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)
1556 1557
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1558
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1559

1560 1561 1562 1563 1564
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1565
	net = dev_net(dev);
1566 1567 1568 1569
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1570 1571 1572 1573 1574 1575
static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

	net = dev_net(dev);
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1576
	lh = rcu_dereference(list_next_rcu(&dev->dev_list));
1577 1578 1579
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1580 1581 1582 1583 1584
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);
}
1585

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1586 1587 1588 1589 1590 1591 1592
static inline struct net_device *first_net_device_rcu(struct net *net)
{
	struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));

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

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1593 1594
extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1595 1596
extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
					      const char *hwaddr);
1597 1598
extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
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extern void		dev_add_pack(struct packet_type *pt);
extern void		dev_remove_pack(struct packet_type *pt);
extern void		__dev_remove_pack(struct packet_type *pt);

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1603 1604
extern struct net_device	*dev_get_by_flags_rcu(struct net *net, unsigned short flags,
						      unsigned short mask);
1605
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
1606
extern struct net_device	*dev_get_by_name_rcu(struct net *net, const char *name);
1607
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
L
Linus Torvalds 已提交
1608 1609 1610
extern int		dev_alloc_name(struct net_device *dev, const char *name);
extern int		dev_open(struct net_device *dev);
extern int		dev_close(struct net_device *dev);
1611
extern void		dev_disable_lro(struct net_device *dev);
L
Linus Torvalds 已提交
1612 1613
extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1614 1615
extern void		unregister_netdevice_queue(struct net_device *dev,
						   struct list_head *head);
1616
extern void		unregister_netdevice_many(struct list_head *head);
1617 1618 1619 1620 1621
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

E
Eric Dumazet 已提交
1622
extern int 		netdev_refcnt_read(const struct net_device *dev);
L
Linus Torvalds 已提交
1623 1624
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
1625
extern int		init_dummy_netdev(struct net_device *dev);
1626
extern void		netdev_resync_ops(struct net_device *dev);
1627

1628 1629
extern struct net_device	*dev_get_by_index(struct net *net, int ifindex);
extern struct net_device	*__dev_get_by_index(struct net *net, int ifindex);
1630
extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
L
Linus Torvalds 已提交
1631 1632 1633 1634
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1635 1636
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);
1637
extern void	       skb_gro_reset_offset(struct sk_buff *skb);
1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653

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;
}

1654 1655
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
1656
{
1657 1658
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
1659

1660 1661 1662 1663
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
1664

1665 1666 1667
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
1668 1669 1670
	if (!pskb_may_pull(skb, hlen))
		return NULL;

1671 1672
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
1673
	return skb->data + offset;
1674
}
L
Linus Torvalds 已提交
1675

1676 1677
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1678
	return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1679 1680
}

H
Herbert Xu 已提交
1681 1682
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
1683 1684
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
Herbert Xu 已提交
1685 1686
}

1687 1688
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1689 1690
				  const void *daddr, const void *saddr,
				  unsigned len)
1691
{
1692
	if (!dev->header_ops || !dev->header_ops->create)
1693
		return 0;
1694 1695

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1696 1697
}

S
Stephen Hemminger 已提交
1698 1699 1700 1701 1702
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1703
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1704
		return 0;
1705
	return dev->header_ops->parse(skb, haddr);
S
Stephen Hemminger 已提交
1706 1707
}

L
Linus Torvalds 已提交
1708 1709 1710 1711 1712 1713 1714 1715
typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
extern int		register_gifconf(unsigned int family, gifconf_func_t * gifconf);
static inline int unregister_gifconf(unsigned int family)
{
	return register_gifconf(family, NULL);
}

/*
E
Eric Dumazet 已提交
1716
 * Incoming packets are placed on per-cpu queues
L
Linus Torvalds 已提交
1717
 */
E
Eric Dumazet 已提交
1718
struct softnet_data {
1719
	struct Qdisc		*output_queue;
1720
	struct Qdisc		**output_queue_tailp;
L
Linus Torvalds 已提交
1721 1722
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
1723
	struct sk_buff_head	process_queue;
L
Linus Torvalds 已提交
1724

C
Changli Gao 已提交
1725
	/* stats */
1726 1727 1728 1729
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
C
Changli Gao 已提交
1730

1731
#ifdef CONFIG_RPS
E
Eric Dumazet 已提交
1732 1733 1734
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
Tom Herbert 已提交
1735
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
1736 1737
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
Tom Herbert 已提交
1738
	unsigned int		input_queue_head;
1739
	unsigned int		input_queue_tail;
1740
#endif
C
Changli Gao 已提交
1741
	unsigned		dropped;
T
Tom Herbert 已提交
1742
	struct sk_buff_head	input_pkt_queue;
1743
	struct napi_struct	backlog;
L
Linus Torvalds 已提交
1744 1745
};

1746
static inline void input_queue_head_incr(struct softnet_data *sd)
T
Tom Herbert 已提交
1747 1748
{
#ifdef CONFIG_RPS
1749 1750 1751 1752 1753 1754 1755 1756 1757
	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
1758 1759 1760
#endif
}

T
Tom Herbert 已提交
1761
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
L
Linus Torvalds 已提交
1762

1763
extern void __netif_schedule(struct Qdisc *q);
L
Linus Torvalds 已提交
1764

1765
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
Linus Torvalds 已提交
1766
{
1767
	if (!(txq->state & QUEUE_STATE_ANY_XOFF))
1768
		__netif_schedule(txq->qdisc);
1769 1770
}

1771 1772 1773 1774 1775 1776 1777 1778
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));
}

1779 1780
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
1781
	clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1782 1783
}

1784 1785 1786 1787 1788 1789
/**
 *	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
1790 1791
static inline void netif_start_queue(struct net_device *dev)
{
1792
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1793 1794
}

1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
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);
	}
}

1805
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1806 1807
{
#ifdef CONFIG_NETPOLL_TRAP
1808
	if (netpoll_trap()) {
1809
		netif_tx_start_queue(dev_queue);
L
Linus Torvalds 已提交
1810
		return;
1811
	}
L
Linus Torvalds 已提交
1812
#endif
1813
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
1814
		__netif_schedule(dev_queue->qdisc);
1815 1816
}

1817 1818 1819 1820 1821 1822 1823
/**
 *	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.
 */
1824 1825
static inline void netif_wake_queue(struct net_device *dev)
{
1826
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1827 1828
}

1829 1830 1831 1832 1833 1834 1835 1836 1837 1838
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);
	}
}

1839 1840
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
1841
	if (WARN_ON(!dev_queue)) {
1842
		pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
1843 1844
		return;
	}
1845
	set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1846 1847
}

1848 1849 1850 1851 1852 1853 1854
/**
 *	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
1855 1856
static inline void netif_stop_queue(struct net_device *dev)
{
1857
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1858 1859
}

1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
static inline void netif_tx_stop_all_queues(struct net_device *dev)
{
	unsigned int i;

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

1870 1871
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
1872
	return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
1873 1874
}

1875 1876 1877 1878 1879 1880
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
L
Linus Torvalds 已提交
1881 1882
static inline int netif_queue_stopped(const struct net_device *dev)
{
1883
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1884 1885
}

1886
static inline int netif_xmit_stopped(const struct netdev_queue *dev_queue)
1887
{
1888 1889 1890 1891 1892 1893 1894 1895
	return dev_queue->state & QUEUE_STATE_ANY_XOFF;
}

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

1896 1897 1898
static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
					unsigned int bytes)
{
T
Tom Herbert 已提交
1899 1900 1901 1902 1903 1904 1905 1906 1907
#ifdef CONFIG_BQL
	dql_queued(&dev_queue->dql, bytes);
	if (unlikely(dql_avail(&dev_queue->dql) < 0)) {
		set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
		if (unlikely(dql_avail(&dev_queue->dql) >= 0))
			clear_bit(__QUEUE_STATE_STACK_XOFF,
			    &dev_queue->state);
	}
#endif
1908 1909 1910 1911 1912 1913 1914 1915 1916 1917
}

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,
					     unsigned pkts, unsigned bytes)
{
T
Tom Herbert 已提交
1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929
#ifdef CONFIG_BQL
	if (likely(bytes)) {
		dql_completed(&dev_queue->dql, bytes);
		if (unlikely(test_bit(__QUEUE_STATE_STACK_XOFF,
		    &dev_queue->state) &&
		    dql_avail(&dev_queue->dql) >= 0)) {
			if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF,
			     &dev_queue->state))
				netif_schedule_queue(dev_queue);
		}
	}
#endif
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939
}

static inline void netdev_completed_queue(struct net_device *dev,
					  unsigned pkts, unsigned bytes)
{
	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
1940 1941 1942
#ifdef CONFIG_BQL
	dql_reset(&q->dql);
#endif
1943 1944 1945 1946 1947
}

static inline void netdev_reset_queue(struct net_device *dev_queue)
{
	netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
1948 1949
}

1950 1951 1952 1953 1954 1955
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
L
Linus Torvalds 已提交
1956 1957 1958 1959 1960
static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

1961 1962 1963 1964 1965 1966
/*
 * 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.
 */
1967 1968 1969 1970 1971 1972 1973 1974

/**
 *	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.
 */
1975 1976
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
1977
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1978 1979

	netif_tx_start_queue(txq);
1980 1981
}

1982 1983 1984 1985 1986 1987 1988
/**
 *	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.
 */
1989 1990
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
1991
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1992 1993 1994 1995
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1996
	netif_tx_stop_queue(txq);
1997 1998
}

1999 2000 2001 2002 2003 2004 2005
/**
 *	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.
 */
2006
static inline int __netif_subqueue_stopped(const struct net_device *dev,
2007 2008
					 u16 queue_index)
{
2009
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2010 2011

	return netif_tx_queue_stopped(txq);
2012 2013
}

2014 2015 2016 2017 2018
static inline int netif_subqueue_stopped(const struct net_device *dev,
					 struct sk_buff *skb)
{
	return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
}
2019 2020 2021 2022 2023 2024 2025 2026

/**
 *	netif_wake_subqueue - allow sending packets on subqueue
 *	@dev: network device
 *	@queue_index: sub queue index
 *
 * Resume individual transmit queue of a device with multiple transmit queues.
 */
2027 2028
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
2029
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
2030 2031 2032 2033
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
2034
	if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
2035
		__netif_schedule(txq->qdisc);
2036 2037
}

2038 2039 2040 2041 2042 2043 2044 2045 2046 2047
/*
 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
 * as a distribution range limit for the returned value.
 */
static inline u16 skb_tx_hash(const struct net_device *dev,
			      const struct sk_buff *skb)
{
	return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
}

2048 2049 2050 2051 2052 2053
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
2054 2055
static inline int netif_is_multiqueue(const struct net_device *dev)
{
E
Eric Dumazet 已提交
2056
	return dev->num_tx_queues > 1;
2057
}
L
Linus Torvalds 已提交
2058

2059 2060
extern int netif_set_real_num_tx_queues(struct net_device *dev,
					unsigned int txq);
2061

2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072
#ifdef CONFIG_RPS
extern int netif_set_real_num_rx_queues(struct net_device *dev,
					unsigned int rxq);
#else
static inline int netif_set_real_num_rx_queues(struct net_device *dev,
						unsigned int rxq)
{
	return 0;
}
#endif

2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
static inline int netif_copy_real_num_queues(struct net_device *to_dev,
					     const struct net_device *from_dev)
{
	netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
#ifdef CONFIG_RPS
	return netif_set_real_num_rx_queues(to_dev,
					    from_dev->real_num_rx_queues);
#else
	return 0;
#endif
}

L
Linus Torvalds 已提交
2085
/* Use this variant when it is known for sure that it
2086 2087
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
Linus Torvalds 已提交
2088
 */
2089
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
Linus Torvalds 已提交
2090 2091

/* Use this variant in places where it could be invoked
2092 2093
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
2094
 */
2095
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
Linus Torvalds 已提交
2096 2097 2098 2099

extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
extern int		netif_receive_skb(struct sk_buff *skb);
2100
extern gro_result_t	dev_gro_receive(struct napi_struct *napi,
2101
					struct sk_buff *skb);
2102 2103
extern gro_result_t	napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
extern gro_result_t	napi_gro_receive(struct napi_struct *napi,
2104
					 struct sk_buff *skb);
E
Eric Dumazet 已提交
2105
extern void		napi_gro_flush(struct napi_struct *napi);
2106
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
2107
extern gro_result_t	napi_frags_finish(struct napi_struct *napi,
2108 2109
					  struct sk_buff *skb,
					  gro_result_t ret);
2110
extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
2111
extern gro_result_t	napi_gro_frags(struct napi_struct *napi);
2112 2113 2114 2115 2116 2117 2118

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

2119
extern int netdev_rx_handler_register(struct net_device *dev,
J
Jiri Pirko 已提交
2120 2121
				      rx_handler_func_t *rx_handler,
				      void *rx_handler_data);
2122 2123
extern void netdev_rx_handler_unregister(struct net_device *dev);

2124
extern int		dev_valid_name(const char *name);
2125 2126
extern int		dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int		dev_ethtool(struct net *net, struct ifreq *);
L
Linus Torvalds 已提交
2127
extern unsigned		dev_get_flags(const struct net_device *);
2128
extern int		__dev_change_flags(struct net_device *, unsigned int flags);
L
Linus Torvalds 已提交
2129
extern int		dev_change_flags(struct net_device *, unsigned);
2130
extern void		__dev_notify_flags(struct net_device *, unsigned int old_flags);
2131
extern int		dev_change_name(struct net_device *, const char *);
2132
extern int		dev_set_alias(struct net_device *, const char *, size_t);
2133 2134
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
Linus Torvalds 已提交
2135
extern int		dev_set_mtu(struct net_device *, int);
2136
extern void		dev_set_group(struct net_device *, int);
L
Linus Torvalds 已提交
2137 2138
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
2139
extern int		dev_hard_start_xmit(struct sk_buff *skb,
2140 2141
					    struct net_device *dev,
					    struct netdev_queue *txq);
2142 2143
extern int		dev_forward_skb(struct net_device *dev,
					struct sk_buff *skb);
L
Linus Torvalds 已提交
2144

2145
extern int		netdev_budget;
L
Linus Torvalds 已提交
2146 2147 2148 2149

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

2150 2151 2152 2153
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
2154
 * Release reference to device to allow it to be freed.
2155
 */
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2156 2157
static inline void dev_put(struct net_device *dev)
{
2158
	this_cpu_dec(*dev->pcpu_refcnt);
L
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2159 2160
}

2161 2162 2163 2164
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
2165
 * Hold reference to device to keep it from being freed.
2166
 */
2167 2168
static inline void dev_hold(struct net_device *dev)
{
2169
	this_cpu_inc(*dev->pcpu_refcnt);
2170
}
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2171 2172 2173 2174

/* 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
2175 2176 2177 2178
 *
 * 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
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2179 2180 2181
 */

extern void linkwatch_fire_event(struct net_device *dev);
2182
extern void linkwatch_forget_dev(struct net_device *dev);
L
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2183

2184 2185 2186 2187 2188 2189
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
L
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2190 2191 2192 2193 2194
static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

2195 2196
extern unsigned long dev_trans_start(struct net_device *dev);

L
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2197 2198
extern void __netdev_watchdog_up(struct net_device *dev);

2199
extern void netif_carrier_on(struct net_device *dev);
L
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2200

2201
extern void netif_carrier_off(struct net_device *dev);
L
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2203 2204
extern void netif_notify_peers(struct net_device *dev);

2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217
/**
 *	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
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2218 2219 2220 2221 2222 2223
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2224 2225 2226 2227 2228 2229
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
2230 2231 2232 2233 2234 2235
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

2236 2237 2238 2239 2240 2241
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
S
Stefan Rompf 已提交
2242 2243 2244 2245 2246 2247
static inline int netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


2248 2249 2250 2251 2252 2253
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
E
Eric Dumazet 已提交
2254 2255
static inline int netif_oper_up(const struct net_device *dev)
{
S
Stefan Rompf 已提交
2256 2257 2258 2259
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

2260 2261 2262 2263 2264 2265
/**
 *	netif_device_present - is device available or removed
 *	@dev: network device
 *
 * Check if device has not been removed from system.
 */
L
Linus Torvalds 已提交
2266 2267 2268 2269 2270
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

2271
extern void netif_device_detach(struct net_device *dev);
L
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2272

2273
extern void netif_device_attach(struct net_device *dev);
L
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2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323

/*
 * 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;
}

2324
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
2325
{
2326 2327
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
2328 2329
}

2330 2331 2332 2333 2334 2335
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
static inline int __netif_tx_trylock(struct netdev_queue *txq)
{
	int ok = spin_trylock(&txq->_xmit_lock);
	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);
}

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Eric Dumazet 已提交
2356 2357 2358 2359 2360 2361
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

2362 2363 2364 2365 2366 2367
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
2368 2369
static inline void netif_tx_lock(struct net_device *dev)
{
2370
	unsigned int i;
2371
	int cpu;
2372

2373 2374
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
2375 2376
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2377 2378 2379 2380 2381 2382 2383

		/* 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.
		 */
2384
		__netif_tx_lock(txq, cpu);
2385 2386
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
2387
	}
H
Herbert Xu 已提交
2388 2389 2390 2391
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
2392 2393
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
2394 2395 2396 2397
}

static inline void netif_tx_unlock(struct net_device *dev)
{
2398 2399 2400 2401
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2402

2403 2404 2405 2406 2407
		/* 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);
2408
		netif_schedule_queue(txq);
2409 2410
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
2411 2412 2413 2414
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
2415 2416
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
2417 2418
}

2419
#define HARD_TX_LOCK(dev, txq, cpu) {			\
2420
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2421
		__netif_tx_lock(txq, cpu);		\
2422 2423 2424
	}						\
}

2425
#define HARD_TX_UNLOCK(dev, txq) {			\
2426
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2427
		__netif_tx_unlock(txq);			\
2428 2429 2430
	}						\
}

L
Linus Torvalds 已提交
2431 2432
static inline void netif_tx_disable(struct net_device *dev)
{
2433
	unsigned int i;
2434
	int cpu;
2435

2436 2437
	local_bh_disable();
	cpu = smp_processor_id();
2438 2439
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2440 2441

		__netif_tx_lock(txq, cpu);
2442
		netif_tx_stop_queue(txq);
2443
		__netif_tx_unlock(txq);
2444
	}
2445
	local_bh_enable();
L
Linus Torvalds 已提交
2446 2447
}

2448 2449 2450 2451 2452
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

2453 2454 2455 2456 2457
static inline void netif_addr_lock_nested(struct net_device *dev)
{
	spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING);
}

2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472
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);
}

2473
/*
2474
 * dev_addrs walker. Should be used only for read access. Call with
2475 2476 2477
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2478
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2479

L
Linus Torvalds 已提交
2480 2481 2482 2483 2484
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
T
Tom Herbert 已提交
2485
extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
2486
				       void (*setup)(struct net_device *),
T
Tom Herbert 已提交
2487
				       unsigned int txqs, unsigned int rxqs);
2488
#define alloc_netdev(sizeof_priv, name, setup) \
T
Tom Herbert 已提交
2489 2490 2491 2492 2493
	alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)

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

L
Linus Torvalds 已提交
2494 2495
extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
2496

2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512
/* General hardware address lists handling functions */
extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
				  struct netdev_hw_addr_list *from_list,
				  int addr_len, unsigned char addr_type);
extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
				   struct netdev_hw_addr_list *from_list,
				   int addr_len, unsigned char addr_type);
extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
			  struct netdev_hw_addr_list *from_list,
			  int addr_len);
extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
			     struct netdev_hw_addr_list *from_list,
			     int addr_len);
extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
extern void __hw_addr_init(struct netdev_hw_addr_list *list);

2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523
/* Functions used for device addresses handling */
extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
			unsigned char addr_type);
extern int dev_addr_add_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
extern int dev_addr_del_multiple(struct net_device *to_dev,
				 struct net_device *from_dev,
				 unsigned char addr_type);
2524 2525 2526 2527 2528 2529 2530 2531 2532 2533
extern void dev_addr_flush(struct net_device *dev);
extern int dev_addr_init(struct net_device *dev);

/* Functions used for unicast addresses handling */
extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
extern int dev_uc_sync(struct net_device *to, struct net_device *from);
extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
extern void dev_uc_flush(struct net_device *dev);
extern void dev_uc_init(struct net_device *dev);
2534

2535 2536 2537 2538 2539 2540 2541 2542 2543
/* Functions used for multicast addresses handling */
extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
extern int dev_mc_sync(struct net_device *to, struct net_device *from);
extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
extern void dev_mc_flush(struct net_device *dev);
extern void dev_mc_init(struct net_device *dev);
2544

2545 2546 2547
/* Functions used for secondary unicast and multicast support */
extern void		dev_set_rx_mode(struct net_device *dev);
extern void		__dev_set_rx_mode(struct net_device *dev);
2548 2549
extern int		dev_set_promiscuity(struct net_device *dev, int inc);
extern int		dev_set_allmulti(struct net_device *dev, int inc);
L
Linus Torvalds 已提交
2550
extern void		netdev_state_change(struct net_device *dev);
2551
extern int		netdev_bonding_change(struct net_device *dev,
2552
					      unsigned long event);
2553
extern void		netdev_features_change(struct net_device *dev);
L
Linus Torvalds 已提交
2554
/* Load a device via the kmod */
2555
extern void		dev_load(struct net *net, const char *name);
L
Linus Torvalds 已提交
2556
extern void		dev_mcast_init(void);
2557 2558
extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					       struct rtnl_link_stats64 *storage);
2559

L
Linus Torvalds 已提交
2560
extern int		netdev_max_backlog;
E
Eric Dumazet 已提交
2561
extern int		netdev_tstamp_prequeue;
L
Linus Torvalds 已提交
2562
extern int		weight_p;
2563
extern int		bpf_jit_enable;
L
Linus Torvalds 已提交
2564
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
J
Jiri Pirko 已提交
2565 2566
extern int netdev_set_bond_master(struct net_device *dev,
				  struct net_device *master);
2567
extern int skb_checksum_help(struct sk_buff *skb);
2568 2569
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb,
	netdev_features_t features);
2570 2571 2572 2573 2574 2575 2576
#ifdef CONFIG_BUG
extern void netdev_rx_csum_fault(struct net_device *dev);
#else
static inline void netdev_rx_csum_fault(struct net_device *dev)
{
}
#endif
L
Linus Torvalds 已提交
2577 2578 2579 2580
/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

2581 2582 2583 2584
#ifdef CONFIG_PROC_FS
extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
extern void dev_seq_stop(struct seq_file *seq, void *v);
2585 2586
extern int dev_seq_open_ops(struct inode *inode, struct file *file,
			    const struct seq_operations *ops);
2587 2588
#endif

2589 2590 2591
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

2592 2593
extern struct kobj_ns_type_operations net_ns_type_operations;

2594
extern const char *netdev_drivername(const struct net_device *dev);
2595

2596 2597
extern void linkwatch_run_queue(void);

2598 2599
static inline netdev_features_t netdev_get_wanted_features(
	struct net_device *dev)
2600 2601 2602
{
	return (dev->features & ~dev->hw_features) | dev->wanted_features;
}
2603 2604
netdev_features_t netdev_increment_features(netdev_features_t all,
	netdev_features_t one, netdev_features_t mask);
2605
int __netdev_update_features(struct net_device *dev);
2606
void netdev_update_features(struct net_device *dev);
2607
void netdev_change_features(struct net_device *dev);
2608

2609 2610 2611
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

2612
netdev_features_t netif_skb_features(struct sk_buff *skb);
2613

2614
static inline int net_gso_ok(netdev_features_t features, int gso_type)
2615
{
2616
	netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
2617 2618 2619 2620 2621 2622 2623 2624 2625

	/* 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));

2626
	return (features & feature) == feature;
2627 2628
}

2629
static inline int skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
2630
{
H
Herbert Xu 已提交
2631
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2632
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2633 2634
}

2635 2636
static inline int netif_needs_gso(struct sk_buff *skb,
	netdev_features_t features)
2637
{
2638 2639
	return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
		unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
2640 2641
}

2642 2643 2644 2645 2646 2647
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

J
Jiri Pirko 已提交
2648 2649 2650 2651 2652
static inline int netif_is_bond_slave(struct net_device *dev)
{
	return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}

2653
extern struct pernet_operations __net_initdata loopback_net_ops;
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/* Logging, debugging and troubleshooting/diagnostic helpers. */

/* netdev_printk helpers, similar to dev_printk */

static inline const char *netdev_name(const struct net_device *dev)
{
	if (dev->reg_state != NETREG_REGISTERED)
		return "(unregistered net_device)";
	return dev->name;
}

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extern int __netdev_printk(const char *level, const struct net_device *dev,
			struct va_format *vaf);

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extern __printf(3, 4)
int netdev_printk(const char *level, const struct net_device *dev,
		  const char *format, ...);
extern __printf(2, 3)
int netdev_emerg(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_alert(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_crit(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_err(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_warn(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_notice(const struct net_device *dev, const char *format, ...);
extern __printf(2, 3)
int netdev_info(const struct net_device *dev, const char *format, ...);
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#define MODULE_ALIAS_NETDEV(device) \
	MODULE_ALIAS("netdev-" device)

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#if defined(DEBUG)
#define netdev_dbg(__dev, format, args...)			\
	netdev_printk(KERN_DEBUG, __dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netdev_dbg(__dev, format, args...)			\
do {								\
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	dynamic_netdev_dbg(__dev, format, ##args);		\
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} while (0)
#else
#define netdev_dbg(__dev, format, args...)			\
({								\
	if (0)							\
		netdev_printk(KERN_DEBUG, __dev, format, ##args); \
	0;							\
})
#endif

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

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

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

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/* 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)

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

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#define netif_emerg(priv, type, dev, fmt, args...)		\
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	netif_level(emerg, priv, type, dev, fmt, ##args)
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#define netif_alert(priv, type, dev, fmt, args...)		\
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	netif_level(alert, priv, type, dev, fmt, ##args)
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#define netif_crit(priv, type, dev, fmt, args...)		\
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	netif_level(crit, priv, type, dev, fmt, ##args)
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#define netif_err(priv, type, dev, fmt, args...)		\
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	netif_level(err, priv, type, dev, fmt, ##args)
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#define netif_warn(priv, type, dev, fmt, args...)		\
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	netif_level(warn, priv, type, dev, fmt, ##args)
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#define netif_notice(priv, type, dev, fmt, args...)		\
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	netif_level(notice, priv, type, dev, fmt, ##args)
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#define netif_info(priv, type, dev, fmt, args...)		\
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	netif_level(info, priv, type, dev, fmt, ##args)
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#if defined(DEBUG)
#define netif_dbg(priv, type, dev, format, args...)		\
	netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define netif_dbg(priv, type, netdev, format, args...)		\
do {								\
	if (netif_msg_##type(priv))				\
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		dynamic_netdev_dbg(netdev, format, ##args);	\
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} while (0)
#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)
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#define netif_vdbg	netif_dbg
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#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
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		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
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	0;							\
})
#endif
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Linus Torvalds 已提交
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#endif /* __KERNEL__ */

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#endif	/* _LINUX_NETDEVICE_H */