netdevice.h 73.3 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_params.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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#include <asm/atomic.h>
#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/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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struct vlan_group;
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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) )

#define HAVE_ALLOC_NETDEV		/* feature macro: alloc_xxxdev
					   functions are available. */
#define HAVE_FREE_NETDEV		/* free_netdev() */
#define HAVE_NETDEV_PRIV		/* netdev_priv() */

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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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#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) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
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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 defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
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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 !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
    !defined(CONFIG_NET_IPGRE) &&  !defined(CONFIG_NET_IPGRE_MODULE) && \
    !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
    !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
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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>

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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	struct hh_cache *hh_next;	/* Next entry			     */
	atomic_t	hh_refcnt;	/* number of users                   */
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/*
 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
 * cache line on SMP.
 * They are mostly read, but hh_refcnt may be changed quite frequently,
 * incurring cache line ping pongs.
 */
	__be16		hh_type ____cacheline_aligned_in_smp;
					/* protocol identifier, f.e ETH_P_IP
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                                         *  NOTE:  For VLANs, this will be the
                                         *  encapuslated type. --BLG
                                         */
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	u16		hh_len;		/* length of header */
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	int		(*hh_output)(struct sk_buff *skb);
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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)];
};

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static inline void hh_cache_put(struct hh_cache *hh)
{
	if (atomic_dec_and_test(&hh->hh_refcnt))
		kfree(hh);
}

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/* 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.
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 *
 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
 * may need.
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 */
#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)
#define LL_ALLOCATED_SPACE(dev) \
	((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(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);
#define HAVE_HEADER_CACHE
	int	(*cache)(const struct neighbour *neigh, struct hh_cache *hh);
	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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typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);

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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_XOFF,
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	__QUEUE_STATE_FROZEN,
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};

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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;
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	unsigned long		state;
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	struct Qdisc		*qdisc_sleeping;
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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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	u64			tx_bytes;
	u64			tx_packets;
	u64			tx_dropped;
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} ____cacheline_aligned_in_smp;
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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];
};
#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))

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/*
 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
 * tail pointer for that CPU's input queue at the time of last enqueue.
 */
struct rps_dev_flow {
	u16 cpu;
	u16 fill;
	unsigned int last_qtail;
};

/*
 * 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) + \
    (_num * sizeof(struct rps_dev_flow)))

/*
 * 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) + \
    (_num * sizeof(u16)))

#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;
}

extern struct rps_sock_flow_table *rps_sock_flow_table;

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/* This structure contains an instance of an RX queue. */
struct netdev_rx_queue {
	struct rps_map *rps_map;
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	struct rps_dev_flow_table *rps_flow_table;
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	struct kobject kobj;
	struct netdev_rx_queue *first;
	atomic_t count;
} ____cacheline_aligned_in_smp;
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#endif /* CONFIG_RPS */
599 600 601

/*
 * This structure defines the management hooks for network devices.
602 603
 * The following hooks can be defined; unless noted otherwise, they are
 * optional and can be filled with a null pointer.
604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622
 *
 * 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.
 *
623 624
 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
 *                               struct net_device *dev);
625
 *	Called when a packet needs to be transmitted.
626 627
 *	Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
 *        (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
628 629 630 631 632 633
 *	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.
 *
634 635 636 637 638 639 640 641 642 643 644 645
 * 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.
 *
 * void (*ndo_set_multicast_list)(struct net_device *dev);
 *	This function is called when the multicast address list changes.
 *
 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
 *	This function  is called when the Media Access Control address
646
 *	needs to be changed. If this interface is not defined, the
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 *	mac address can not be changed.
 *
 * int (*ndo_validate_addr)(struct net_device *dev);
 *	Test if Media Access Control address is valid for the device.
 *
 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
 *	Called when a user request an ioctl which can't be handled by
 *	the generic interface code. If not defined ioctl's return
 *	not supported error code.
 *
 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
 *	Used to set network devices bus interface parameters. This interface
 *	is retained for legacy reason, new devices should use the bus
 *	interface (PCI) for low level management.
 *
 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
 *	Called when a user wants to change the Maximum Transfer Unit
 *	of a device. If not defined, any request to change MTU will
 *	will return an error.
 *
667
 * void (*ndo_tx_timeout)(struct net_device *dev);
668 669 670
 *	Callback uses when the transmitter has not made any progress
 *	for dev->watchdog ticks.
 *
671
 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
672
 *                      struct rtnl_link_stats64 *storage);
673
 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
674
 *	Called when a user wants to get the network device usage
675
 *	statistics. Drivers must do one of the following:
676 677
 *	1. Define @ndo_get_stats64 to fill in a zero-initialised
 *	   rtnl_link_stats64 structure passed by the caller.
678
 *	2. Define @ndo_get_stats to update a net_device_stats structure
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 *	   (which should normally be dev->stats) and return a pointer to
 *	   it. The structure may be changed asynchronously only if each
 *	   field is written atomically.
 *	3. Update dev->stats asynchronously and atomically, and define
 *	   neither operation.
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 *
 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
 *	If device support VLAN receive accleration
 *	(ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
 *	when vlan groups for the device changes.  Note: grp is NULL
 *	if no vlan's groups are being used.
 *
 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
 *	If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
 *	this function is called when a VLAN id is registered.
 *
 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
 *	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);
 * int (*ndo_get_vf_config)(struct net_device *dev,
 *			    int vf, struct ifla_vf_info *ivf);
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 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
 *			  struct nlattr *port[]);
 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
710
 */
711
#define HAVE_NET_DEVICE_OPS
712 713 714 715 716
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);
717
	netdev_tx_t		(*ndo_start_xmit) (struct sk_buff *skb,
718 719 720
						   struct net_device *dev);
	u16			(*ndo_select_queue)(struct net_device *dev,
						    struct sk_buff *skb);
721 722 723 724 725 726 727 728 729 730 731
	void			(*ndo_change_rx_flags)(struct net_device *dev,
						       int flags);
	void			(*ndo_set_rx_mode)(struct net_device *dev);
	void			(*ndo_set_multicast_list)(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);
732 733 734 735
	int			(*ndo_change_mtu)(struct net_device *dev,
						  int new_mtu);
	int			(*ndo_neigh_setup)(struct net_device *dev,
						   struct neigh_parms *);
736 737
	void			(*ndo_tx_timeout) (struct net_device *dev);

738 739
	struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
						     struct rtnl_link_stats64 *storage);
740 741 742 743 744 745 746 747 748 749
	struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);

	void			(*ndo_vlan_rx_register)(struct net_device *dev,
						        struct vlan_group *grp);
	void			(*ndo_vlan_rx_add_vid)(struct net_device *dev,
						       unsigned short vid);
	void			(*ndo_vlan_rx_kill_vid)(struct net_device *dev,
						        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);
752
	void			(*ndo_netpoll_cleanup)(struct net_device *dev);
753
#endif
754 755 756 757 758 759 760 761 762
	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);
	int			(*ndo_get_vf_config)(struct net_device *dev,
						     int vf,
						     struct ifla_vf_info *ivf);
763 764 765 766 767
	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);
768
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
769 770
	int			(*ndo_fcoe_enable)(struct net_device *dev);
	int			(*ndo_fcoe_disable)(struct net_device *dev);
771 772 773 774 775 776
	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);
777 778 779 780
#define NETDEV_FCOE_WWNN 0
#define NETDEV_FCOE_WWPN 1
	int			(*ndo_fcoe_get_wwn)(struct net_device *dev,
						    u64 *wwn, int type);
781
#endif
782 783
};

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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
799
	 * of the interface.
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	 */
	char			name[IFNAMSIZ];
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803
	struct pm_qos_request_list pm_qos_req;
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805 806
	/* device name hash chain */
	struct hlist_node	name_hlist;
807 808
	/* 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 char		if_port;	/* Selectable AUI, TP,..*/
	unsigned char		dma;		/* DMA channel		*/

	unsigned long		state;

829
	struct list_head	dev_list;
830
	struct list_head	napi_list;
831
	struct list_head	unreg_list;
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833 834 835
	/* Net device features */
	unsigned long		features;
#define NETIF_F_SG		1	/* Scatter/gather IO. */
836
#define NETIF_F_IP_CSUM		2	/* Can checksum TCP/UDP over IPv4. */
837 838
#define NETIF_F_NO_CSUM		4	/* Does not require checksum. F.e. loopack. */
#define NETIF_F_HW_CSUM		8	/* Can checksum all the packets. */
839
#define NETIF_F_IPV6_CSUM	16	/* Can checksum TCP/UDP over IPV6 */
840 841 842 843 844 845
#define NETIF_F_HIGHDMA		32	/* Can DMA to high memory. */
#define NETIF_F_FRAGLIST	64	/* Scatter/gather IO. */
#define NETIF_F_HW_VLAN_TX	128	/* Transmit VLAN hw acceleration */
#define NETIF_F_HW_VLAN_RX	256	/* Receive VLAN hw acceleration */
#define NETIF_F_HW_VLAN_FILTER	512	/* Receive filtering on VLAN */
#define NETIF_F_VLAN_CHALLENGED	1024	/* Device cannot handle VLAN packets */
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#define NETIF_F_GSO		2048	/* Enable software GSO. */
847 848
#define NETIF_F_LLTX		4096	/* LockLess TX - deprecated. Please */
					/* do not use LLTX in new drivers */
849
#define NETIF_F_NETNS_LOCAL	8192	/* Does not change network namespaces */
850
#define NETIF_F_GRO		16384	/* Generic receive offload */
851
#define NETIF_F_LRO		32768	/* large receive offload */
852

853
/* the GSO_MASK reserves bits 16 through 23 */
854
#define NETIF_F_FCOE_CRC	(1 << 24) /* FCoE CRC32 */
855
#define NETIF_F_SCTP_CSUM	(1 << 25) /* SCTP checksum offload */
856
#define NETIF_F_FCOE_MTU	(1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
857
#define NETIF_F_NTUPLE		(1 << 27) /* N-tuple filters supported */
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#define NETIF_F_RXHASH		(1 << 28) /* Receive hashing offload */
859

860
	/* Segmentation offload features */
861
#define NETIF_F_GSO_SHIFT	16
862
#define NETIF_F_GSO_MASK	0x00ff0000
863
#define NETIF_F_TSO		(SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
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#define NETIF_F_UFO		(SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
865
#define NETIF_F_GSO_ROBUST	(SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
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#define NETIF_F_TSO_ECN		(SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO6		(SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
868
#define NETIF_F_FSO		(SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
869

870
	/* List of features with software fallbacks. */
871 872
#define NETIF_F_GSO_SOFTWARE	(NETIF_F_TSO | NETIF_F_TSO_ECN | \
				 NETIF_F_TSO6 | NETIF_F_UFO)
873

874

875
#define NETIF_F_GEN_CSUM	(NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
876 877 878
#define NETIF_F_V4_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
#define NETIF_F_V6_CSUM		(NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
#define NETIF_F_ALL_CSUM	(NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
879

880 881 882 883 884
	/*
	 * If one device supports one of these features, then enable them
	 * for all in netdev_increment_features.
	 */
#define NETIF_F_ONE_FOR_ALL	(NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
885
				 NETIF_F_SG | NETIF_F_HIGHDMA |		\
886 887
				 NETIF_F_FRAGLIST)

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

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	struct net_device_stats	stats;
893 894 895
	atomic_long_t		rx_dropped; /* dropped packets by core network
					     * Do not use this in drivers.
					     */
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897
#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;
903
#endif
904 905
	/* Management operations */
	const struct net_device_ops *netdev_ops;
906
	const struct ethtool_ops *ethtool_ops;
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908 909 910
	/* Hardware header description */
	const struct header_ops *header_ops;

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	unsigned int		flags;	/* interface flags (a la BSD)	*/
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	unsigned short		gflags;
913
        unsigned int            priv_flags; /* Like 'flags' but invisible to userspace. */
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	unsigned short		padded;	/* How much padding added by alloc_netdev() */

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	unsigned char		operstate; /* RFC2863 operstate */
	unsigned char		link_mode; /* mapping policy to operstate */

919
	unsigned int		mtu;	/* interface MTU value		*/
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	unsigned short		type;	/* interface hardware type	*/
	unsigned short		hard_header_len;	/* hardware hdr length	*/

923 924 925 926 927 928 929
	/* extra head- and tailroom the hardware may need, but not in all cases
	 * can this be guaranteed, especially tailroom. Some cases also use
	 * LL_MAX_HEADER instead to allocate the skb.
	 */
	unsigned short		needed_headroom;
	unsigned short		needed_tailroom;

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	/* Interface address info. */
931
	unsigned char		perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
932
	unsigned char		addr_assign_type; /* hw address assignment type */
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	unsigned char		addr_len;	/* hardware address length	*/
	unsigned short          dev_id;		/* for shared network cards */

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	spinlock_t		addr_list_lock;
937 938 939
	struct netdev_hw_addr_list	uc;	/* Unicast mac addresses */
	struct netdev_hw_addr_list	mc;	/* Multicast mac addresses */
	int			uc_promisc;
940 941
	unsigned int		promiscuity;
	unsigned int		allmulti;
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	/* Protocol specific pointers */
945 946

#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
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	struct vlan_group __rcu	*vlgrp;		/* VLAN group */
948
#endif
949 950 951
#ifdef CONFIG_NET_DSA
	void			*dsa_ptr;	/* dsa specific data */
#endif
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	void 			*atalk_ptr;	/* AppleTalk link 	*/
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	struct in_device __rcu	*ip_ptr;	/* IPv4 specific data	*/
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	void                    *dn_ptr;        /* DECnet specific data */
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	struct inet6_dev __rcu	*ip6_ptr;       /* IPv6 specific data */
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	void			*ec_ptr;	/* Econet specific data	*/
	void			*ax25_ptr;	/* AX.25 specific data */
958 959
	struct wireless_dev	*ieee80211_ptr;	/* IEEE 802.11 specific data,
						   assign before registering */
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961
/*
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 * Cache lines mostly used on receive path (including eth_type_trans())
963
 */
964 965 966 967 968 969 970 971
	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.
					  */

976
	/* Interface address info used in eth_type_trans() */
977 978 979 980
	unsigned char		*dev_addr;	/* hw address, (before bcast
						   because most packets are
						   unicast) */

981 982
	struct netdev_hw_addr_list	dev_addrs; /* list of device
						      hw addresses */
983 984

	unsigned char		broadcast[MAX_ADDR_LEN];	/* hw bcast add	*/
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#ifdef CONFIG_RPS
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	struct kset		*queues_kset;

	struct netdev_rx_queue	*_rx;

991
	/* Number of RX queues allocated at register_netdev() time */
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	unsigned int		num_rx_queues;
993 994 995

	/* Number of RX queues currently active in device */
	unsigned int		real_num_rx_queues;
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#endif
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998
	rx_handler_func_t	*rx_handler;
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	void			*rx_handler_data;
1000

1001
	struct netdev_queue __rcu *ingress_queue;
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/*
 * Cache lines mostly used on transmit path
 */
1006
	struct netdev_queue	*_tx ____cacheline_aligned_in_smp;
1007 1008

	/* Number of TX queues allocated at alloc_netdev_mq() time  */
1009
	unsigned int		num_tx_queues;
1010 1011 1012 1013

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

1014 1015 1016
	/* root qdisc from userspace point of view */
	struct Qdisc		*qdisc;

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	unsigned long		tx_queue_len;	/* Max frames per queue allowed */
1018
	spinlock_t		tx_global_lock;
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1020
	/* These may be needed for future network-power-down code. */
1021 1022 1023 1024 1025

	/*
	 * trans_start here is expensive for high speed devices on SMP,
	 * please use netdev_queue->trans_start instead.
	 */
1026 1027 1028 1029 1030
	unsigned long		trans_start;	/* Time (in jiffies) of last Tx	*/

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

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	/* Number of references to this device */
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	int __percpu		*pcpu_refcnt;
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	/* delayed register/unregister */
	struct list_head	todo_list;
	/* device index hash chain */
	struct hlist_node	index_hlist;

1039
	struct list_head	link_watch_list;
1040

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	/* register/unregister state machine */
	enum { NETREG_UNINITIALIZED=0,
1043
	       NETREG_REGISTERED,	/* completed register_netdevice */
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	       NETREG_UNREGISTERING,	/* called unregister_netdevice */
	       NETREG_UNREGISTERED,	/* completed unregister todo */
	       NETREG_RELEASED,		/* called free_netdev */
1047
	       NETREG_DUMMY,		/* dummy device for NAPI poll */
1048 1049 1050 1051 1052 1053
	} reg_state:16;

	enum {
		RTNL_LINK_INITIALIZED,
		RTNL_LINK_INITIALIZING,
	} rtnl_link_state:16;
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1055 1056
	/* Called from unregister, can be used to call free_netdev */
	void (*destructor)(struct net_device *dev);
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#ifdef CONFIG_NETPOLL
1059
	struct netpoll_info	*npinfo;
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#endif
1061

1062
#ifdef CONFIG_NET_NS
1063 1064
	/* Network namespace this network device is inside */
	struct net		*nd_net;
1065
#endif
1066

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	/* mid-layer private */
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1068 1069 1070
	union {
		void				*ml_priv;
		struct pcpu_lstats __percpu	*lstats; /* loopback stats */
1071
		struct pcpu_tstats __percpu	*tstats; /* tunnel stats */
1072
		struct pcpu_dstats __percpu	*dstats; /* dummy stats */
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	};
1074
	/* GARP */
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	struct garp_port __rcu	*garp_port;
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	/* class/net/name entry */
1078
	struct device		dev;
1079 1080
	/* space for optional device, statistics, and wireless sysfs groups */
	const struct attribute_group *sysfs_groups[4];
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	/* rtnetlink link ops */
	const struct rtnl_link_ops *rtnl_link_ops;
1084

1085 1086 1087
	/* VLAN feature mask */
	unsigned long vlan_features;

1088 1089 1090
	/* for setting kernel sock attribute on TCP connection setup */
#define GSO_MAX_SIZE		65536
	unsigned int		gso_max_size;
1091

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1092
#ifdef CONFIG_DCB
1093
	/* Data Center Bridging netlink ops */
1094
	const struct dcbnl_rtnl_ops *dcbnl_ops;
1095 1096
#endif

1097 1098 1099 1100
#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
	/* max exchange id for FCoE LRO by ddp */
	unsigned int		fcoe_ddp_xid;
#endif
1101 1102
	/* n-tuple filter list attached to this device */
	struct ethtool_rx_ntuple_list ethtool_ntuple_list;
1103 1104 1105

	/* phy device may attach itself for hardware timestamping */
	struct phy_device *phydev;
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};
1107
#define to_net_dev(d) container_of(d, struct net_device, dev)
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#define	NETDEV_ALIGN		32

1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
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);
}

1130 1131 1132 1133 1134 1135
/*
 * Net namespace inlines
 */
static inline
struct net *dev_net(const struct net_device *dev)
{
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	return read_pnet(&dev->nd_net);
1137 1138 1139
}

static inline
1140
void dev_net_set(struct net_device *dev, struct net *net)
1141 1142
{
#ifdef CONFIG_NET_NS
1143 1144
	release_net(dev->nd_net);
	dev->nd_net = hold_net(net);
1145 1146 1147
#endif
}

1148 1149 1150 1151 1152 1153 1154 1155 1156 1157
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;
}

1158 1159 1160 1161 1162 1163 1164 1165 1166
#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

1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
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;
}

1177 1178 1179 1180 1181 1182
/**
 *	netdev_priv - access network device private data
 *	@dev: network device
 *
 * Get network device private data
 */
1183
static inline void *netdev_priv(const struct net_device *dev)
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{
1185
	return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
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}

/* Set the sysfs physical device reference for the network logical device
 * if set prior to registration will cause a symlink during initialization.
 */
1191
#define SET_NETDEV_DEV(net, pdev)	((net)->dev.parent = (pdev))
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1193 1194 1195 1196 1197 1198
/* 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))

1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
/**
 *	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.
 */
1209 1210
void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
		    int (*poll)(struct napi_struct *, int), int weight);
1211

1212 1213 1214 1215 1216 1217
/**
 *  netif_napi_del - remove a napi context
 *  @napi: napi context
 *
 *  netif_napi_del() removes a napi context from the network device napi list
 */
1218 1219 1220
void netif_napi_del(struct napi_struct *napi);

struct napi_gro_cb {
1221 1222 1223
	/* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
	void *frag0;

1224 1225 1226
	/* Length of frag0. */
	unsigned int frag0_len;

1227 1228 1229
	/* This indicates where we are processing relative to skb->data. */
	int data_offset;

1230 1231 1232 1233 1234 1235 1236 1237
	/* 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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1238 1239 1240

	/* Free the skb? */
	int free;
1241 1242 1243
};

#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
1244

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struct packet_type {
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1246 1247 1248 1249 1250 1251
	__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 *);
1252 1253
	struct sk_buff		*(*gso_segment)(struct sk_buff *skb,
						int features);
1254
	int			(*gso_send_check)(struct sk_buff *skb);
1255 1256 1257
	struct sk_buff		**(*gro_receive)(struct sk_buff **head,
					       struct sk_buff *skb);
	int			(*gro_complete)(struct sk_buff *skb);
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	void			*af_packet_priv;
	struct list_head	list;
};

#include <linux/interrupt.h>
#include <linux/notifier.h>

extern rwlock_t				dev_base_lock;		/* Device list lock */

1267

1268 1269
#define for_each_netdev(net, d)		\
		list_for_each_entry(d, &(net)->dev_base_head, dev_list)
1270 1271
#define for_each_netdev_reverse(net, d)	\
		list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
1272 1273
#define for_each_netdev_rcu(net, d)		\
		list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
1274 1275 1276 1277
#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)
1278 1279
#define for_each_netdev_continue_rcu(net, d)		\
	list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
1280
#define net_device_entry(lh)	list_entry(lh, struct net_device, dev_list)
1281

1282 1283 1284 1285 1286
static inline struct net_device *next_net_device(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

1287
	net = dev_net(dev);
1288 1289 1290 1291
	lh = dev->dev_list.next;
	return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
}

1292 1293 1294 1295 1296 1297 1298 1299 1300 1301
static inline struct net_device *next_net_device_rcu(struct net_device *dev)
{
	struct list_head *lh;
	struct net *net;

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

1302 1303 1304 1305 1306
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);
}
1307

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extern int 			netdev_boot_setup_check(struct net_device *dev);
extern unsigned long		netdev_boot_base(const char *prefix, int unit);
1310 1311 1312
extern struct net_device    *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
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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extern struct net_device	*dev_get_by_flags_rcu(struct net *net, unsigned short flags,
						      unsigned short mask);
1319
extern struct net_device	*dev_get_by_name(struct net *net, const char *name);
1320
extern struct net_device	*dev_get_by_name_rcu(struct net *net, const char *name);
1321
extern struct net_device	*__dev_get_by_name(struct net *net, const char *name);
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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);
1325
extern void		dev_disable_lro(struct net_device *dev);
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extern int		dev_queue_xmit(struct sk_buff *skb);
extern int		register_netdevice(struct net_device *dev);
1328 1329
extern void		unregister_netdevice_queue(struct net_device *dev,
						   struct list_head *head);
1330
extern void		unregister_netdevice_many(struct list_head *head);
1331 1332 1333 1334 1335
static inline void unregister_netdevice(struct net_device *dev)
{
	unregister_netdevice_queue(dev, NULL);
}

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1336
extern int 		netdev_refcnt_read(const struct net_device *dev);
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1337 1338 1339 1340
extern void		free_netdev(struct net_device *dev);
extern void		synchronize_net(void);
extern int 		register_netdevice_notifier(struct notifier_block *nb);
extern int		unregister_netdevice_notifier(struct notifier_block *nb);
1341
extern int		init_dummy_netdev(struct net_device *dev);
1342
extern void		netdev_resync_ops(struct net_device *dev);
1343

1344
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1345 1346
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);
1347
extern struct net_device	*dev_get_by_index_rcu(struct net *net, int ifindex);
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1348 1349 1350 1351
extern int		dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int		netpoll_trap(void);
#endif
1352 1353
extern int	       skb_gro_receive(struct sk_buff **head,
				       struct sk_buff *skb);
1354
extern void	       skb_gro_reset_offset(struct sk_buff *skb);
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370

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;
}

1371 1372
static inline void *skb_gro_header_fast(struct sk_buff *skb,
					unsigned int offset)
1373
{
1374 1375
	return NAPI_GRO_CB(skb)->frag0 + offset;
}
1376

1377 1378 1379 1380
static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
{
	return NAPI_GRO_CB(skb)->frag0_len < hlen;
}
1381

1382 1383 1384 1385 1386 1387
static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
					unsigned int offset)
{
	NAPI_GRO_CB(skb)->frag0 = NULL;
	NAPI_GRO_CB(skb)->frag0_len = 0;
	return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1388
}
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1390 1391
static inline void *skb_gro_mac_header(struct sk_buff *skb)
{
1392
	return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
1393 1394
}

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1395 1396
static inline void *skb_gro_network_header(struct sk_buff *skb)
{
1397 1398
	return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
	       skb_network_offset(skb);
H
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1399 1400
}

1401 1402
static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
				  unsigned short type,
1403 1404
				  const void *daddr, const void *saddr,
				  unsigned len)
1405
{
1406
	if (!dev->header_ops || !dev->header_ops->create)
1407
		return 0;
1408 1409

	return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
1410 1411
}

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1412 1413 1414 1415 1416
static inline int dev_parse_header(const struct sk_buff *skb,
				   unsigned char *haddr)
{
	const struct net_device *dev = skb->dev;

1417
	if (!dev->header_ops || !dev->header_ops->parse)
S
Stephen Hemminger 已提交
1418
		return 0;
1419
	return dev->header_ops->parse(skb, haddr);
S
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1420 1421
}

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1422 1423 1424 1425 1426 1427 1428 1429
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);
}

/*
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Eric Dumazet 已提交
1430
 * Incoming packets are placed on per-cpu queues
L
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1431
 */
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1432
struct softnet_data {
1433
	struct Qdisc		*output_queue;
1434
	struct Qdisc		**output_queue_tailp;
L
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1435 1436
	struct list_head	poll_list;
	struct sk_buff		*completion_queue;
1437
	struct sk_buff_head	process_queue;
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1438

C
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1439
	/* stats */
1440 1441 1442 1443
	unsigned int		processed;
	unsigned int		time_squeeze;
	unsigned int		cpu_collision;
	unsigned int		received_rps;
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1445
#ifdef CONFIG_RPS
E
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1446 1447 1448
	struct softnet_data	*rps_ipi_list;

	/* Elements below can be accessed between CPUs for RPS */
T
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1449
	struct call_single_data	csd ____cacheline_aligned_in_smp;
E
Eric Dumazet 已提交
1450 1451
	struct softnet_data	*rps_ipi_next;
	unsigned int		cpu;
T
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1452
	unsigned int		input_queue_head;
1453
	unsigned int		input_queue_tail;
1454
#endif
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1455
	unsigned		dropped;
T
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1456
	struct sk_buff_head	input_pkt_queue;
1457
	struct napi_struct	backlog;
L
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1458 1459
};

1460
static inline void input_queue_head_incr(struct softnet_data *sd)
T
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1461 1462
{
#ifdef CONFIG_RPS
1463 1464 1465 1466 1467 1468 1469 1470 1471
	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
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1472 1473 1474
#endif
}

T
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1475
DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
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1476 1477 1478

#define HAVE_NETIF_QUEUE

1479
extern void __netif_schedule(struct Qdisc *q);
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1480

1481
static inline void netif_schedule_queue(struct netdev_queue *txq)
L
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1482
{
1483
	if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
1484
		__netif_schedule(txq->qdisc);
1485 1486
}

1487 1488 1489 1490 1491 1492 1493 1494
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));
}

1495 1496 1497 1498 1499
static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
{
	clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1500 1501 1502 1503 1504 1505
/**
 *	netif_start_queue - allow transmit
 *	@dev: network device
 *
 *	Allow upper layers to call the device hard_start_xmit routine.
 */
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1506 1507
static inline void netif_start_queue(struct net_device *dev)
{
1508
	netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
L
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1509 1510
}

1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
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);
	}
}

1521
static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
L
Linus Torvalds 已提交
1522 1523
{
#ifdef CONFIG_NETPOLL_TRAP
1524
	if (netpoll_trap()) {
1525
		netif_tx_start_queue(dev_queue);
L
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1526
		return;
1527
	}
L
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1528
#endif
1529
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
1530
		__netif_schedule(dev_queue->qdisc);
1531 1532
}

1533 1534 1535 1536 1537 1538 1539
/**
 *	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.
 */
1540 1541
static inline void netif_wake_queue(struct net_device *dev)
{
1542
	netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
L
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1543 1544
}

1545 1546 1547 1548 1549 1550 1551 1552 1553 1554
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);
	}
}

1555 1556 1557 1558 1559
static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
{
	set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1560 1561 1562 1563 1564 1565 1566
/**
 *	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.
 */
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static inline void netif_stop_queue(struct net_device *dev)
{
1569
	netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
L
Linus Torvalds 已提交
1570 1571
}

1572 1573 1574 1575 1576 1577 1578 1579 1580 1581
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);
	}
}

1582 1583 1584 1585 1586
static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
}

1587 1588 1589 1590 1591 1592
/**
 *	netif_queue_stopped - test if transmit queue is flowblocked
 *	@dev: network device
 *
 *	Test if transmit queue on device is currently unable to send.
 */
L
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1593 1594
static inline int netif_queue_stopped(const struct net_device *dev)
{
1595
	return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
L
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}

1598 1599 1600 1601 1602
static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
{
	return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
}

1603 1604 1605 1606 1607 1608
/**
 *	netif_running - test if up
 *	@dev: network device
 *
 *	Test if the device has been brought up.
 */
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1609 1610 1611 1612 1613
static inline int netif_running(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_START, &dev->state);
}

1614 1615 1616 1617 1618 1619
/*
 * 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.
 */
1620 1621 1622 1623 1624 1625 1626 1627

/**
 *	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.
 */
1628 1629
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
1630
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1631 1632

	netif_tx_start_queue(txq);
1633 1634
}

1635 1636 1637 1638 1639 1640 1641
/**
 *	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.
 */
1642 1643
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
1644
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1645 1646 1647 1648
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1649
	netif_tx_stop_queue(txq);
1650 1651
}

1652 1653 1654 1655 1656 1657 1658
/**
 *	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.
 */
1659
static inline int __netif_subqueue_stopped(const struct net_device *dev,
1660 1661
					 u16 queue_index)
{
1662
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1663 1664

	return netif_tx_queue_stopped(txq);
1665 1666
}

1667 1668 1669 1670 1671
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));
}
1672 1673 1674 1675 1676 1677 1678 1679

/**
 *	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.
 */
1680 1681
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
1682
	struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
1683 1684 1685 1686
#ifdef CONFIG_NETPOLL_TRAP
	if (netpoll_trap())
		return;
#endif
1687
	if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
1688
		__netif_schedule(txq->qdisc);
1689 1690
}

1691 1692 1693 1694 1695 1696
/**
 *	netif_is_multiqueue - test if device has multiple transmit queues
 *	@dev: network device
 *
 * Check if device has multiple transmit queues
 */
1697 1698
static inline int netif_is_multiqueue(const struct net_device *dev)
{
E
Eric Dumazet 已提交
1699
	return dev->num_tx_queues > 1;
1700
}
L
Linus Torvalds 已提交
1701

1702 1703
extern int netif_set_real_num_tx_queues(struct net_device *dev,
					unsigned int txq);
1704

1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715
#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

1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
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
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1728
/* Use this variant when it is known for sure that it
1729 1730
 * is executing from hardware interrupt context or with hardware interrupts
 * disabled.
L
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1731
 */
1732
extern void dev_kfree_skb_irq(struct sk_buff *skb);
L
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1733 1734

/* Use this variant in places where it could be invoked
1735 1736
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
L
Linus Torvalds 已提交
1737
 */
1738
extern void dev_kfree_skb_any(struct sk_buff *skb);
L
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1739 1740 1741 1742 1743 1744

#define HAVE_NETIF_RX 1
extern int		netif_rx(struct sk_buff *skb);
extern int		netif_rx_ni(struct sk_buff *skb);
#define HAVE_NETIF_RECEIVE_SKB 1
extern int		netif_receive_skb(struct sk_buff *skb);
1745
extern gro_result_t	dev_gro_receive(struct napi_struct *napi,
1746
					struct sk_buff *skb);
1747 1748
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,
1749
					 struct sk_buff *skb);
E
Eric Dumazet 已提交
1750
extern void		napi_gro_flush(struct napi_struct *napi);
1751
extern struct sk_buff *	napi_get_frags(struct napi_struct *napi);
1752
extern gro_result_t	napi_frags_finish(struct napi_struct *napi,
1753 1754
					  struct sk_buff *skb,
					  gro_result_t ret);
1755
extern struct sk_buff *	napi_frags_skb(struct napi_struct *napi);
1756
extern gro_result_t	napi_gro_frags(struct napi_struct *napi);
1757 1758 1759 1760 1761 1762 1763

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

1764
extern int netdev_rx_handler_register(struct net_device *dev,
J
Jiri Pirko 已提交
1765 1766
				      rx_handler_func_t *rx_handler,
				      void *rx_handler_data);
1767 1768
extern void netdev_rx_handler_unregister(struct net_device *dev);

1769
extern int		dev_valid_name(const char *name);
1770 1771
extern int		dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int		dev_ethtool(struct net *net, struct ifreq *);
L
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1772
extern unsigned		dev_get_flags(const struct net_device *);
1773
extern int		__dev_change_flags(struct net_device *, unsigned int flags);
L
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1774
extern int		dev_change_flags(struct net_device *, unsigned);
1775
extern void		__dev_notify_flags(struct net_device *, unsigned int old_flags);
1776
extern int		dev_change_name(struct net_device *, const char *);
1777
extern int		dev_set_alias(struct net_device *, const char *, size_t);
1778 1779
extern int		dev_change_net_namespace(struct net_device *,
						 struct net *, const char *);
L
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1780 1781 1782
extern int		dev_set_mtu(struct net_device *, int);
extern int		dev_set_mac_address(struct net_device *,
					    struct sockaddr *);
1783
extern int		dev_hard_start_xmit(struct sk_buff *skb,
1784 1785
					    struct net_device *dev,
					    struct netdev_queue *txq);
1786 1787
extern int		dev_forward_skb(struct net_device *dev,
					struct sk_buff *skb);
L
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1788

1789
extern int		netdev_budget;
L
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1790 1791 1792 1793

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

1794 1795 1796 1797
/**
 *	dev_put - release reference to device
 *	@dev: network device
 *
1798
 * Release reference to device to allow it to be freed.
1799
 */
L
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1800 1801
static inline void dev_put(struct net_device *dev)
{
E
Eric Dumazet 已提交
1802
	irqsafe_cpu_dec(*dev->pcpu_refcnt);
L
Linus Torvalds 已提交
1803 1804
}

1805 1806 1807 1808
/**
 *	dev_hold - get reference to device
 *	@dev: network device
 *
1809
 * Hold reference to device to keep it from being freed.
1810
 */
1811 1812
static inline void dev_hold(struct net_device *dev)
{
E
Eric Dumazet 已提交
1813
	irqsafe_cpu_inc(*dev->pcpu_refcnt);
1814
}
L
Linus Torvalds 已提交
1815 1816 1817 1818

/* 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
1819 1820 1821 1822
 *
 * The name carrier is inappropriate, these functions should really be
 * called netif_lowerlayer_*() because they represent the state of any
 * kind of lower layer not just hardware media.
L
Linus Torvalds 已提交
1823 1824 1825
 */

extern void linkwatch_fire_event(struct net_device *dev);
1826
extern void linkwatch_forget_dev(struct net_device *dev);
L
Linus Torvalds 已提交
1827

1828 1829 1830 1831 1832 1833
/**
 *	netif_carrier_ok - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
L
Linus Torvalds 已提交
1834 1835 1836 1837 1838
static inline int netif_carrier_ok(const struct net_device *dev)
{
	return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

1839 1840
extern unsigned long dev_trans_start(struct net_device *dev);

L
Linus Torvalds 已提交
1841 1842
extern void __netdev_watchdog_up(struct net_device *dev);

1843
extern void netif_carrier_on(struct net_device *dev);
L
Linus Torvalds 已提交
1844

1845
extern void netif_carrier_off(struct net_device *dev);
L
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1846

1847 1848
extern void netif_notify_peers(struct net_device *dev);

1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861
/**
 *	netif_dormant_on - mark device as dormant.
 *	@dev: network device
 *
 * Mark device as dormant (as per RFC2863).
 *
 * The dormant state indicates that the relevant interface is not
 * actually in a condition to pass packets (i.e., it is not 'up') but is
 * in a "pending" state, waiting for some external event.  For "on-
 * demand" interfaces, this new state identifies the situation where the
 * interface is waiting for events to place it in the up state.
 *
 */
S
Stefan Rompf 已提交
1862 1863 1864 1865 1866 1867
static inline void netif_dormant_on(struct net_device *dev)
{
	if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1868 1869 1870 1871 1872 1873
/**
 *	netif_dormant_off - set device as not dormant.
 *	@dev: network device
 *
 * Device is not in dormant state.
 */
S
Stefan Rompf 已提交
1874 1875 1876 1877 1878 1879
static inline void netif_dormant_off(struct net_device *dev)
{
	if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
		linkwatch_fire_event(dev);
}

1880 1881 1882 1883 1884 1885
/**
 *	netif_dormant - test if carrier present
 *	@dev: network device
 *
 * Check if carrier is present on device
 */
S
Stefan Rompf 已提交
1886 1887 1888 1889 1890 1891
static inline int netif_dormant(const struct net_device *dev)
{
	return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


1892 1893 1894 1895 1896 1897
/**
 *	netif_oper_up - test if device is operational
 *	@dev: network device
 *
 * Check if carrier is operational
 */
E
Eric Dumazet 已提交
1898 1899
static inline int netif_oper_up(const struct net_device *dev)
{
S
Stefan Rompf 已提交
1900 1901 1902 1903
	return (dev->operstate == IF_OPER_UP ||
		dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

1904 1905 1906 1907 1908 1909
/**
 *	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
1910 1911 1912 1913 1914
static inline int netif_device_present(struct net_device *dev)
{
	return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

1915
extern void netif_device_detach(struct net_device *dev);
L
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1916

1917
extern void netif_device_attach(struct net_device *dev);
L
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1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968

/*
 * Network interface message level settings
 */
#define HAVE_NETIF_MSG 1

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;
}

1969
static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
H
Herbert Xu 已提交
1970
{
1971 1972
	spin_lock(&txq->_xmit_lock);
	txq->xmit_lock_owner = cpu;
1973 1974
}

1975 1976 1977 1978 1979 1980
static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
	spin_lock_bh(&txq->_xmit_lock);
	txq->xmit_lock_owner = smp_processor_id();
}

1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
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);
}

E
Eric Dumazet 已提交
2001 2002 2003 2004 2005 2006
static inline void txq_trans_update(struct netdev_queue *txq)
{
	if (txq->xmit_lock_owner != -1)
		txq->trans_start = jiffies;
}

2007 2008 2009 2010 2011 2012
/**
 *	netif_tx_lock - grab network device transmit lock
 *	@dev: network device
 *
 * Get network device transmit lock
 */
2013 2014
static inline void netif_tx_lock(struct net_device *dev)
{
2015
	unsigned int i;
2016
	int cpu;
2017

2018 2019
	spin_lock(&dev->tx_global_lock);
	cpu = smp_processor_id();
2020 2021
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2022 2023 2024 2025 2026 2027 2028

		/* 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.
		 */
2029
		__netif_tx_lock(txq, cpu);
2030 2031
		set_bit(__QUEUE_STATE_FROZEN, &txq->state);
		__netif_tx_unlock(txq);
2032
	}
H
Herbert Xu 已提交
2033 2034 2035 2036
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
2037 2038
	local_bh_disable();
	netif_tx_lock(dev);
H
Herbert Xu 已提交
2039 2040 2041 2042
}

static inline void netif_tx_unlock(struct net_device *dev)
{
2043 2044 2045 2046
	unsigned int i;

	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2047

2048 2049 2050 2051 2052
		/* 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);
2053
		netif_schedule_queue(txq);
2054 2055
	}
	spin_unlock(&dev->tx_global_lock);
H
Herbert Xu 已提交
2056 2057 2058 2059
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
2060 2061
	netif_tx_unlock(dev);
	local_bh_enable();
H
Herbert Xu 已提交
2062 2063
}

2064
#define HARD_TX_LOCK(dev, txq, cpu) {			\
2065
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2066
		__netif_tx_lock(txq, cpu);		\
2067 2068 2069
	}						\
}

2070
#define HARD_TX_UNLOCK(dev, txq) {			\
2071
	if ((dev->features & NETIF_F_LLTX) == 0) {	\
2072
		__netif_tx_unlock(txq);			\
2073 2074 2075
	}						\
}

L
Linus Torvalds 已提交
2076 2077
static inline void netif_tx_disable(struct net_device *dev)
{
2078
	unsigned int i;
2079
	int cpu;
2080

2081 2082
	local_bh_disable();
	cpu = smp_processor_id();
2083 2084
	for (i = 0; i < dev->num_tx_queues; i++) {
		struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2085 2086

		__netif_tx_lock(txq, cpu);
2087
		netif_tx_stop_queue(txq);
2088
		__netif_tx_unlock(txq);
2089
	}
2090
	local_bh_enable();
L
Linus Torvalds 已提交
2091 2092
}

2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112
static inline void netif_addr_lock(struct net_device *dev)
{
	spin_lock(&dev->addr_list_lock);
}

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);
}

2113
/*
2114
 * dev_addrs walker. Should be used only for read access. Call with
2115 2116 2117
 * rcu_read_lock held.
 */
#define for_each_dev_addr(dev, ha) \
2118
		list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
2119

L
Linus Torvalds 已提交
2120 2121 2122 2123 2124
/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void		ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
2125 2126 2127 2128 2129
extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
				       void (*setup)(struct net_device *),
				       unsigned int queue_count);
#define alloc_netdev(sizeof_priv, name, setup) \
	alloc_netdev_mq(sizeof_priv, name, setup, 1)
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extern int		register_netdev(struct net_device *dev);
extern void		unregister_netdev(struct net_device *dev);
2132

2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148
/* 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);

2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159
/* 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);
2160 2161 2162 2163 2164 2165 2166 2167 2168 2169
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);
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2171 2172 2173 2174 2175 2176 2177 2178 2179
/* 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);
2180

2181 2182 2183
/* 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);
2184 2185
extern int		dev_set_promiscuity(struct net_device *dev, int inc);
extern int		dev_set_allmulti(struct net_device *dev, int inc);
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extern void		netdev_state_change(struct net_device *dev);
2187
extern int		netdev_bonding_change(struct net_device *dev,
2188
					      unsigned long event);
2189
extern void		netdev_features_change(struct net_device *dev);
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/* Load a device via the kmod */
2191
extern void		dev_load(struct net *net, const char *name);
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extern void		dev_mcast_init(void);
2193 2194
extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
					       struct rtnl_link_stats64 *storage);
2195
extern void		dev_txq_stats_fold(const struct net_device *dev,
2196
					   struct rtnl_link_stats64 *stats);
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extern int		netdev_max_backlog;
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extern int		netdev_tstamp_prequeue;
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extern int		weight_p;
extern int		netdev_set_master(struct net_device *dev, struct net_device *master);
2202
extern int skb_checksum_help(struct sk_buff *skb);
2203
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2204 2205 2206 2207 2208 2209 2210
#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
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/* rx skb timestamps */
extern void		net_enable_timestamp(void);
extern void		net_disable_timestamp(void);

2215 2216 2217 2218 2219 2220
#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);
#endif

2221 2222 2223
extern int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

2224 2225
extern struct kobj_ns_type_operations net_ns_type_operations;

2226
extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
2227

2228 2229
extern void linkwatch_run_queue(void);

2230 2231 2232
unsigned long netdev_increment_features(unsigned long all, unsigned long one,
					unsigned long mask);
unsigned long netdev_fix_features(unsigned long features, const char *name);
2233

2234 2235 2236
void netif_stacked_transfer_operstate(const struct net_device *rootdev,
					struct net_device *dev);

2237
static inline int net_gso_ok(int features, int gso_type)
2238
{
2239
	int feature = gso_type << NETIF_F_GSO_SHIFT;
2240
	return (features & feature) == feature;
2241 2242
}

2243 2244
static inline int skb_gso_ok(struct sk_buff *skb, int features)
{
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Herbert Xu 已提交
2245
	return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
2246
	       (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
2247 2248
}

2249 2250
static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
{
2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261
	if (skb_is_gso(skb)) {
		int features = dev->features;

		if (skb->protocol == htons(ETH_P_8021Q) || skb->vlan_tci)
			features &= dev->vlan_features;

		return (!skb_gso_ok(skb, features) ||
			unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
	}

	return 0;
2262 2263
}

2264 2265 2266 2267 2268 2269
static inline void netif_set_gso_max_size(struct net_device *dev,
					  unsigned int size)
{
	dev->gso_max_size = size;
}

2270 2271
extern int __skb_bond_should_drop(struct sk_buff *skb,
				  struct net_device *master);
2272

2273 2274
static inline int skb_bond_should_drop(struct sk_buff *skb,
				       struct net_device *master)
2275
{
2276 2277
	if (master)
		return __skb_bond_should_drop(skb, master);
2278 2279 2280
	return 0;
}

2281
extern struct pernet_operations __net_initdata loopback_net_ops;
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303

static inline int dev_ethtool_get_settings(struct net_device *dev,
					   struct ethtool_cmd *cmd)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
		return -EOPNOTSUPP;
	return dev->ethtool_ops->get_settings(dev, cmd);
}

static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
		return 0;
	return dev->ethtool_ops->get_rx_csum(dev);
}

static inline u32 dev_ethtool_get_flags(struct net_device *dev)
{
	if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
		return 0;
	return dev->ethtool_ops->get_flags(dev);
}
2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315

/* 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;
}

2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332
extern int netdev_printk(const char *level, const struct net_device *dev,
			 const char *format, ...)
	__attribute__ ((format (printf, 3, 4)));
extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_alert(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_crit(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_err(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_warn(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_notice(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int netdev_info(const struct net_device *dev, const char *format, ...)
	__attribute__ ((format (printf, 2, 3)));
2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371

#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 {								\
	dynamic_dev_dbg((__dev)->dev.parent, "%s: " format,	\
			netdev_name(__dev), ##args);		\
} 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);

2372 2373 2374 2375 2376 2377 2378 2379
/* 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)

2380 2381 2382 2383 2384 2385
#define netif_level(level, priv, type, dev, fmt, args...)	\
do {								\
	if (netif_msg_##type(priv))				\
		netdev_##level(dev, fmt, ##args);		\
} while (0)

2386
#define netif_emerg(priv, type, dev, fmt, args...)		\
2387
	netif_level(emerg, priv, type, dev, fmt, ##args)
2388
#define netif_alert(priv, type, dev, fmt, args...)		\
2389
	netif_level(alert, priv, type, dev, fmt, ##args)
2390
#define netif_crit(priv, type, dev, fmt, args...)		\
2391
	netif_level(crit, priv, type, dev, fmt, ##args)
2392
#define netif_err(priv, type, dev, fmt, args...)		\
2393
	netif_level(err, priv, type, dev, fmt, ##args)
2394
#define netif_warn(priv, type, dev, fmt, args...)		\
2395
	netif_level(warn, priv, type, dev, fmt, ##args)
2396
#define netif_notice(priv, type, dev, fmt, args...)		\
2397
	netif_level(notice, priv, type, dev, fmt, ##args)
2398
#define netif_info(priv, type, dev, fmt, args...)		\
2399
	netif_level(info, priv, type, dev, fmt, ##args)
2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421

#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))				\
		dynamic_dev_dbg((netdev)->dev.parent,		\
				"%s: " format,			\
				netdev_name(netdev), ##args);	\
} 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)
2422
#define netif_vdbg	netif_dbg
2423 2424 2425 2426
#else
#define netif_vdbg(priv, type, dev, format, args...)		\
({								\
	if (0)							\
2427
		netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2428 2429 2430
	0;							\
})
#endif
2431

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2432 2433
#endif /* __KERNEL__ */

2434
#endif	/* _LINUX_NETDEVICE_H */