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netdevice.h

/*
 * 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
 *
 * Authors: Ross Biro
 *          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>
 *          Alan Cox, <Alan.Cox@linux.org>
 *          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>

#ifdef __KERNEL__
#include <linux/timer.h>
#include <linux/delay.h>
#include <asm/atomic.h>
#include <asm/cache.h>
#include <asm/byteorder.h>

#include <linux/device.h>
#include <linux/percpu.h>
#include <linux/dmaengine.h>
#include <linux/workqueue.h>

#include <net/net_namespace.h>

struct vlan_group;
struct ethtool_ops;
struct netpoll_info;
/* 802.11 specific */
struct wireless_dev;
                              /* 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() */

#define NET_XMIT_SUCCESS      0
#define NET_XMIT_DROP         1     /* skb dropped                */
#define NET_XMIT_CN           2     /* congestion notification    */
#define NET_XMIT_POLICED      3     /* skb is shot by police      */
#define NET_XMIT_BYPASS       4     /* packet does not leave via dequeue;
                                 (TC use only - dev_queue_xmit
                                 returns this as NET_XMIT_SUCCESS) */

/* Backlog congestion levels */
#define NET_RX_SUCCESS        0   /* keep 'em coming, baby */
#define NET_RX_DROP           1  /* packet dropped */
#define NET_RX_CN_LOW         2   /* storm alert, just in case */
#define NET_RX_CN_MOD         3   /* Storm on its way! */
#define NET_RX_CN_HIGH        4   /* The storm is here */
#define NET_RX_BAD            5  /* packet dropped due to kernel error */

/* 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. */
#define net_xmit_eval(e)      ((e) == NET_XMIT_CN? 0 : (e))
#define net_xmit_errno(e)     ((e) != NET_XMIT_CN ? -ENOBUFS : 0)

#endif

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

/* Driver transmit return codes */
#define NETDEV_TX_OK 0        /* driver took care of packet */
#define NETDEV_TX_BUSY 1      /* driver tx path was busy*/
#define NETDEV_TX_LOCKED -1   /* driver tx lock was already taken */

/*
 *    Compute the worst case header length according to the protocols
 *    used.
 */
 
#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
#define LL_MAX_HEADER   32
#else
#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
#define LL_MAX_HEADER   96
#else
#define LL_MAX_HEADER   48
#endif
#endif

#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)
#define MAX_HEADER LL_MAX_HEADER
#else
#define MAX_HEADER (LL_MAX_HEADER + 48)
#endif

struct net_device_subqueue
{
      /* Give a control state for each queue.  This struct may contain
       * per-queue locks in the future.
       */
      unsigned long   state;
};

/*
 *    Network device statistics. Akin to the 2.0 ether stats but
 *    with byte counters.
 */
 
struct net_device_stats
{
      unsigned long     rx_packets;       /* total packets received     */
      unsigned long     tx_packets;       /* total packets transmitted  */
      unsigned long     rx_bytes;         /* total bytes received       */
      unsigned long     tx_bytes;         /* total bytes transmitted    */
      unsigned long     rx_errors;        /* bad packets received       */
      unsigned long     tx_errors;        /* packet transmit problems   */
      unsigned long     rx_dropped;       /* no space in linux buffers  */
      unsigned long     tx_dropped;       /* no space available in linux      */
      unsigned long     multicast;        /* multicast packets received */
      unsigned long     collisions;

      /* detailed rx_errors: */
      unsigned long     rx_length_errors;
      unsigned long     rx_over_errors;         /* receiver ring buff overflow      */
      unsigned long     rx_crc_errors;          /* recved pkt with crc error  */
      unsigned long     rx_frame_errors;  /* recv'd frame alignment error */
      unsigned long     rx_fifo_errors;         /* recv'r fifo overrun        */
      unsigned long     rx_missed_errors; /* receiver missed packet     */

      /* detailed tx_errors */
      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;
      
      /* for cslip etc */
      unsigned long     rx_compressed;
      unsigned long     tx_compressed;
};


/* 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;

struct netif_rx_stats
{
      unsigned total;
      unsigned dropped;
      unsigned time_squeeze;
      unsigned cpu_collision;
};

DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);

struct dev_addr_list
{
      struct dev_addr_list    *next;
      u8                da_addr[MAX_ADDR_LEN];
      u8                da_addrlen;
      u8                da_synced;
      int               da_users;
      int               da_gusers;
};

/*
 *    We tag multicasts with these structures.
 */

#define dev_mc_list     dev_addr_list
#define dmi_addr  da_addr
#define dmi_addrlen     da_addrlen
#define dmi_users da_users
#define dmi_gusers      da_gusers

struct hh_cache
{
      struct hh_cache *hh_next;     /* Next entry                      */
      atomic_t    hh_refcnt;  /* number of users                   */
/*
 * 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
                                         *  NOTE:  For VLANs, this will be the
                                         *  encapuslated type. --BLG
                                         */
      u16         hh_len;           /* length of header */
      int         (*hh_output)(struct sk_buff *skb);
      seqlock_t   hh_lock;

      /* cached hardware header; allow for machine alignment needs.        */
#define HH_DATA_MOD     16
#define HH_DATA_OFF(__len) \
      (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
#define HH_DATA_ALIGN(__len) \
      (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
      unsigned long     hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
};

/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
 * Alternative is:
 *   dev->hard_header_len ? (dev->hard_header_len +
 *                           (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
 *
 * We could use other alignment values, but we must maintain the
 * relationship HH alignment <= LL alignment.
 */
#define LL_RESERVED_SPACE(dev) \
      (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
      ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)

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);
};

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

enum netdev_state_t
{
      __LINK_STATE_XOFF=0,
      __LINK_STATE_START,
      __LINK_STATE_PRESENT,
      __LINK_STATE_SCHED,
      __LINK_STATE_NOCARRIER,
      __LINK_STATE_LINKWATCH_PENDING,
      __LINK_STATE_DORMANT,
      __LINK_STATE_QDISC_RUNNING,
};


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

extern int __init netdev_boot_setup(char *str);

/*
 * 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;
      struct net_device *dev;
      struct list_head  dev_list;
#endif
};

enum
{
      NAPI_STATE_SCHED, /* Poll is scheduled */
      NAPI_STATE_DISABLE,     /* Disable pending */
};

extern void FASTCALL(__napi_schedule(struct napi_struct *n));

static inline int napi_disable_pending(struct napi_struct *n)
{
      return test_bit(NAPI_STATE_DISABLE, &n->state);
}

/**
 *    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
 * insure only one NAPI poll instance runs.  We also make
 * sure there is no pending NAPI disable.
 */
static inline int napi_schedule_prep(struct napi_struct *n)
{
      return !napi_disable_pending(n) &&
            !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
}

/**
 *    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);
}

/* 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;
}

/**
 *    napi_complete - NAPI processing complete
 *    @n: napi context
 *
 * Mark NAPI processing as complete.
 */
static inline void __napi_complete(struct napi_struct *n)
{
      BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
      list_del(&n->poll_list);
      smp_mb__before_clear_bit();
      clear_bit(NAPI_STATE_SCHED, &n->state);
}

static inline void napi_complete(struct napi_struct *n)
{
      local_irq_disable();
      __napi_complete(n);
      local_irq_enable();
}

/**
 *    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)
{
      set_bit(NAPI_STATE_DISABLE, &n->state);
      while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
            msleep(1);
      clear_bit(NAPI_STATE_DISABLE, &n->state);
}

/**
 *    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);
}

#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

/*
 *    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.
 */

struct net_device
{

      /*
       * 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
       * the interface.
       */
      char              name[IFNAMSIZ];
      /* device name hash chain */
      struct hlist_node name_hlist;

      /*
       *    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;

      struct list_head  dev_list;
#ifdef CONFIG_NETPOLL
      struct list_head  napi_list;
#endif
      
      /* The device initialization function. Called only once. */
      int               (*init)(struct net_device *dev);

      /* ------- Fields preinitialized in Space.c finish here ------- */

      /* Net device features */
      unsigned long           features;
#define NETIF_F_SG            1     /* Scatter/gather IO. */
#define NETIF_F_IP_CSUM       2     /* Can checksum TCP/UDP over IPv4. */
#define NETIF_F_NO_CSUM       4     /* Does not require checksum. F.e. loopack. */
#define NETIF_F_HW_CSUM       8     /* Can checksum all the packets. */
#define NETIF_F_IPV6_CSUM     16    /* Can checksum TCP/UDP over IPV6 */
#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 */
#define NETIF_F_GSO           2048  /* Enable software GSO. */
#define NETIF_F_LLTX          4096  /* LockLess TX - deprecated. Please */
                              /* do not use LLTX in new drivers */
#define NETIF_F_NETNS_LOCAL   8192  /* Does not change network namespaces */
#define NETIF_F_MULTI_QUEUE   16384 /* Has multiple TX/RX queues */
#define NETIF_F_LRO           32768 /* large receive offload */

      /* Segmentation offload features */
#define NETIF_F_GSO_SHIFT     16
#define NETIF_F_GSO_MASK      0xffff0000
#define NETIF_F_TSO           (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
#define NETIF_F_UFO           (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
#define NETIF_F_GSO_ROBUST    (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO_ECN       (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
#define NETIF_F_TSO6          (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)

      /* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE  (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)


#define NETIF_F_GEN_CSUM      (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
#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)

      struct net_device *next_sched;

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


      struct net_device_stats* (*get_stats)(struct net_device *dev);
      struct net_device_stats stats;

#ifdef CONFIG_WIRELESS_EXT
      /* 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;
#endif
      const struct ethtool_ops *ethtool_ops;

      /* Hardware header description */
      const struct header_ops *header_ops;

      /*
       * This marks the end of the "visible" part of the structure. All
       * fields hereafter are internal to the system, and may change at
       * will (read: may be cleaned up at will).
       */


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

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

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

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

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

      struct dev_addr_list    *uc_list;   /* Secondary unicast mac addresses */
      int               uc_count;   /* Number of installed ucasts */
      int               uc_promisc;
      struct dev_addr_list    *mc_list;   /* Multicast mac addresses    */
      int               mc_count;   /* Number of installed mcasts */
      int               promiscuity;
      int               allmulti;


      /* Protocol specific pointers */
      
      void              *atalk_ptr; /* AppleTalk link       */
      void              *ip_ptr;    /* IPv4 specific data   */  
      void                    *dn_ptr;        /* DECnet specific data */
      void                    *ip6_ptr;       /* IPv6 specific data */
      void              *ec_ptr;    /* Econet specific data */
      void              *ax25_ptr;  /* AX.25 specific data */
      struct wireless_dev     *ieee80211_ptr;   /* IEEE 802.11 specific data,
                                       assign before registering */

/*
 * Cache line mostly used on receive path (including eth_type_trans())
 */
      unsigned long           last_rx;    /* Time of last Rx      */
      /* Interface address info used in eth_type_trans() */
      unsigned char           dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast 
                                          because most packets are unicast) */

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

/*
 * Cache line mostly used on queue transmit path (qdisc)
 */
      /* device queue lock */
      spinlock_t        queue_lock ____cacheline_aligned_in_smp;
      struct Qdisc            *qdisc;
      struct Qdisc            *qdisc_sleeping;
      struct list_head  qdisc_list;
      unsigned long           tx_queue_len;     /* Max frames per queue allowed */

      /* Partially transmitted GSO packet. */
      struct sk_buff          *gso_skb;

      /* ingress path synchronizer */
      spinlock_t        ingress_lock;
      struct Qdisc            *qdisc_ingress;

/*
 * One part is mostly used on xmit path (device)
 */
      /* hard_start_xmit synchronizer */
      spinlock_t        _xmit_lock ____cacheline_aligned_in_smp;
      /* cpu id of processor entered to hard_start_xmit or -1,
         if nobody entered there.
       */
      int               xmit_lock_owner;
      void              *priv;      /* pointer to private data    */
      int               (*hard_start_xmit) (struct sk_buff *skb,
                                        struct net_device *dev);
      /* These may be needed for future network-power-down code. */
      unsigned long           trans_start;      /* Time (in jiffies) of last Tx     */

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

/*
 * refcnt is a very hot point, so align it on SMP
 */
      /* Number of references to this device */
      atomic_t          refcnt ____cacheline_aligned_in_smp;

      /* delayed register/unregister */
      struct list_head  todo_list;
      /* device index hash chain */
      struct hlist_node index_hlist;

      struct net_device *link_watch_next;

      /* register/unregister state machine */
      enum { NETREG_UNINITIALIZED=0,
             NETREG_REGISTERED,     /* completed register_netdevice */
             NETREG_UNREGISTERING,  /* called unregister_netdevice */
             NETREG_UNREGISTERED,   /* completed unregister todo */
             NETREG_RELEASED,       /* called free_netdev */
      } reg_state;

      /* Called after device is detached from network. */
      void              (*uninit)(struct net_device *dev);
      /* Called after last user reference disappears. */
      void              (*destructor)(struct net_device *dev);

      /* Pointers to interface service routines.      */
      int               (*open)(struct net_device *dev);
      int               (*stop)(struct net_device *dev);
#define HAVE_NETDEV_POLL
#define HAVE_CHANGE_RX_FLAGS
      void              (*change_rx_flags)(struct net_device *dev,
                                       int flags);
#define HAVE_SET_RX_MODE
      void              (*set_rx_mode)(struct net_device *dev);
#define HAVE_MULTICAST               
      void              (*set_multicast_list)(struct net_device *dev);
#define HAVE_SET_MAC_ADDR            
      int               (*set_mac_address)(struct net_device *dev,
                                       void *addr);
#define HAVE_VALIDATE_ADDR
      int               (*validate_addr)(struct net_device *dev);
#define HAVE_PRIVATE_IOCTL
      int               (*do_ioctl)(struct net_device *dev,
                                  struct ifreq *ifr, int cmd);
#define HAVE_SET_CONFIG
      int               (*set_config)(struct net_device *dev,
                                    struct ifmap *map);
#define HAVE_CHANGE_MTU
      int               (*change_mtu)(struct net_device *dev, int new_mtu);

#define HAVE_TX_TIMEOUT
      void              (*tx_timeout) (struct net_device *dev);

      void              (*vlan_rx_register)(struct net_device *dev,
                                        struct vlan_group *grp);
      void              (*vlan_rx_add_vid)(struct net_device *dev,
                                       unsigned short vid);
      void              (*vlan_rx_kill_vid)(struct net_device *dev,
                                        unsigned short vid);

      int               (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
#ifdef CONFIG_NETPOLL
      struct netpoll_info     *npinfo;
#endif
#ifdef CONFIG_NET_POLL_CONTROLLER
      void                    (*poll_controller)(struct net_device *dev);
#endif

      /* Network namespace this network device is inside */
      struct net        *nd_net;

      /* bridge stuff */
      struct net_bridge_port  *br_port;
      /* macvlan */
      struct macvlan_port     *macvlan_port;

      /* class/net/name entry */
      struct device           dev;
      /* space for optional statistics and wireless sysfs groups */
      struct attribute_group  *sysfs_groups[3];

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

      /* The TX queue control structures */
      unsigned int                  egress_subqueue_count;
      struct net_device_subqueue    egress_subqueue[1];
};
#define to_net_dev(d) container_of(d, struct net_device, dev)

#define     NETDEV_ALIGN            32
#define     NETDEV_ALIGN_CONST      (NETDEV_ALIGN - 1)

/**
 *    netdev_priv - access network device private data
 *    @dev: network device
 *
 * Get network device private data
 */
static inline void *netdev_priv(const struct net_device *dev)
{
      return dev->priv;
}

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

/**
 *    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.
 */
static inline void netif_napi_add(struct net_device *dev,
                          struct napi_struct *napi,
                          int (*poll)(struct napi_struct *, int),
                          int weight)
{
      INIT_LIST_HEAD(&napi->poll_list);
      napi->poll = poll;
      napi->weight = weight;
#ifdef CONFIG_NETPOLL
      napi->dev = dev;
      list_add(&napi->dev_list, &dev->napi_list);
      spin_lock_init(&napi->poll_lock);
      napi->poll_owner = -1;
#endif
      set_bit(NAPI_STATE_SCHED, &napi->state);
}

struct packet_type {
      __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 *);
      struct sk_buff          *(*gso_segment)(struct sk_buff *skb,
                                    int features);
      int               (*gso_send_check)(struct sk_buff *skb);
      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 */


#define for_each_netdev(net, d)           \
            list_for_each_entry(d, &(net)->dev_base_head, dev_list)
#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)
#define net_device_entry(lh)  list_entry(lh, struct net_device, dev_list)

static inline struct net_device *next_net_device(struct net_device *dev)
{
      struct list_head *lh;
      struct net *net;

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

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);
}

extern int              netdev_boot_setup_check(struct net_device *dev);
extern unsigned long          netdev_boot_base(const char *prefix, int unit);
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);
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);

extern struct net_device      *dev_get_by_flags(struct net *net, unsigned short flags,
                                      unsigned short mask);
extern struct net_device      *dev_get_by_name(struct net *net, const char *name);
extern struct net_device      *__dev_get_by_name(struct net *net, const char *name);
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);
extern int        dev_queue_xmit(struct sk_buff *skb);
extern int        register_netdevice(struct net_device *dev);
extern void       unregister_netdevice(struct net_device *dev);
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);
extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
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);
extern int        dev_restart(struct net_device *dev);
#ifdef CONFIG_NETPOLL_TRAP
extern int        netpoll_trap(void);
#endif

static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
                          unsigned short type,
                          const void *daddr, const void *saddr,
                          unsigned len)
{
      if (!dev->header_ops || !dev->header_ops->create)
            return 0;

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

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

      if (!dev->header_ops || !dev->header_ops->parse)
            return 0;
      return dev->header_ops->parse(skb, haddr);
}

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);
}

/*
 * Incoming packets are placed on per-cpu queues so that
 * no locking is needed.
 */
struct softnet_data
{
      struct net_device *output_queue;
      struct sk_buff_head     input_pkt_queue;
      struct list_head  poll_list;
      struct sk_buff          *completion_queue;

      struct napi_struct      backlog;
#ifdef CONFIG_NET_DMA
      struct dma_chan         *net_dma;
#endif
};

DECLARE_PER_CPU(struct softnet_data,softnet_data);

#define HAVE_NETIF_QUEUE

extern void __netif_schedule(struct net_device *dev);

static inline void netif_schedule(struct net_device *dev)
{
      if (!test_bit(__LINK_STATE_XOFF, &dev->state))
            __netif_schedule(dev);
}

/**
 *    netif_start_queue - allow transmit
 *    @dev: network device
 *
 *    Allow upper layers to call the device hard_start_xmit routine.
 */
static inline void netif_start_queue(struct net_device *dev)
{
      clear_bit(__LINK_STATE_XOFF, &dev->state);
}

/**
 *    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.
 */
static inline void netif_wake_queue(struct net_device *dev)
{
#ifdef CONFIG_NETPOLL_TRAP
      if (netpoll_trap()) {
            clear_bit(__LINK_STATE_XOFF, &dev->state);
            return;
      }
#endif
      if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
            __netif_schedule(dev);
}

/**
 *    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.
 */
static inline void netif_stop_queue(struct net_device *dev)
{
      set_bit(__LINK_STATE_XOFF, &dev->state);
}

/**
 *    netif_queue_stopped - test if transmit queue is flowblocked
 *    @dev: network device
 *
 *    Test if transmit queue on device is currently unable to send.
 */
static inline int netif_queue_stopped(const struct net_device *dev)
{
      return test_bit(__LINK_STATE_XOFF, &dev->state);
}

/**
 *    netif_running - test if up
 *    @dev: network device
 *
 *    Test if the device has been brought up.
 */
static inline int netif_running(const struct net_device *dev)
{
      return test_bit(__LINK_STATE_START, &dev->state);
}

/*
 * 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.
 */

/**
 *    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.
 */
static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
      clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
#endif
}

/**
 *    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.
 */
static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
#ifdef CONFIG_NETPOLL_TRAP
      if (netpoll_trap())
            return;
#endif
      set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
#endif
}

/**
 *    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.
 */
static inline int __netif_subqueue_stopped(const struct net_device *dev,
                               u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
      return test_bit(__LINK_STATE_XOFF,
                  &dev->egress_subqueue[queue_index].state);
#else
      return 0;
#endif
}

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));
}

/**
 *    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.
 */
static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
#ifdef CONFIG_NETPOLL_TRAP
      if (netpoll_trap())
            return;
#endif
      if (test_and_clear_bit(__LINK_STATE_XOFF,
                         &dev->egress_subqueue[queue_index].state))
            __netif_schedule(dev);
#endif
}

/**
 *    netif_is_multiqueue - test if device has multiple transmit queues
 *    @dev: network device
 *
 * Check if device has multiple transmit queues
 * Always falls if NETDEVICE_MULTIQUEUE is not configured
 */
static inline int netif_is_multiqueue(const struct net_device *dev)
{
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
      return (!!(NETIF_F_MULTI_QUEUE & dev->features));
#else
      return 0;
#endif
}

/* Use this variant when it is known for sure that it
 * is executing from interrupt context.
 */
extern void dev_kfree_skb_irq(struct sk_buff *skb);

/* Use this variant in places where it could be invoked
 * either from interrupt or non-interrupt context.
 */
extern void dev_kfree_skb_any(struct sk_buff *skb);

#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);
extern int        dev_valid_name(const char *name);
extern int        dev_ioctl(struct net *net, unsigned int cmd, void __user *);
extern int        dev_ethtool(struct net *net, struct ifreq *);
extern unsigned         dev_get_flags(const struct net_device *);
extern int        dev_change_flags(struct net_device *, unsigned);
extern int        dev_change_name(struct net_device *, char *);
extern int        dev_change_net_namespace(struct net_device *,
                                     struct net *, const char *);
extern int        dev_set_mtu(struct net_device *, int);
extern int        dev_set_mac_address(struct net_device *,
                                  struct sockaddr *);
extern int        dev_hard_start_xmit(struct sk_buff *skb,
                                  struct net_device *dev);

extern int        netdev_budget;

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

/**
 *    dev_put - release reference to device
 *    @dev: network device
 *
 * Release reference to device to allow it to be freed.
 */
static inline void dev_put(struct net_device *dev)
{
      atomic_dec(&dev->refcnt);
}

/**
 *    dev_hold - get reference to device
 *    @dev: network device
 *
 * Hold reference to device to keep it from being freed.
 */
static inline void dev_hold(struct net_device *dev)
{
      atomic_inc(&dev->refcnt);
}

/* 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.
 *
 * 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.
 */

extern void linkwatch_fire_event(struct net_device *dev);

/**
 *    netif_carrier_ok - test if carrier present
 *    @dev: network device
 *
 * Check if carrier is present on device
 */
static inline int netif_carrier_ok(const struct net_device *dev)
{
      return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
}

extern void __netdev_watchdog_up(struct net_device *dev);

extern void netif_carrier_on(struct net_device *dev);

extern void netif_carrier_off(struct net_device *dev);

/**
 *    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.
 *
 */
static inline void netif_dormant_on(struct net_device *dev)
{
      if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
            linkwatch_fire_event(dev);
}

/**
 *    netif_dormant_off - set device as not dormant.
 *    @dev: network device
 *
 * Device is not in dormant state.
 */
static inline void netif_dormant_off(struct net_device *dev)
{
      if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
            linkwatch_fire_event(dev);
}

/**
 *    netif_dormant - test if carrier present
 *    @dev: network device
 *
 * Check if carrier is present on device
 */
static inline int netif_dormant(const struct net_device *dev)
{
      return test_bit(__LINK_STATE_DORMANT, &dev->state);
}


/**
 *    netif_oper_up - test if device is operational
 *    @dev: network device
 *
 * Check if carrier is operational
 */
static inline int netif_oper_up(const struct net_device *dev) {
      return (dev->operstate == IF_OPER_UP ||
            dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
}

/**
 *    netif_device_present - is device available or removed
 *    @dev: network device
 *
 * Check if device has not been removed from system.
 */
static inline int netif_device_present(struct net_device *dev)
{
      return test_bit(__LINK_STATE_PRESENT, &dev->state);
}

extern void netif_device_detach(struct net_device *dev);

extern void netif_device_attach(struct net_device *dev);

/*
 * 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;
}

/* Test if receive needs to be scheduled but only if up */
static inline int netif_rx_schedule_prep(struct net_device *dev,
                               struct napi_struct *napi)
{
      return napi_schedule_prep(napi);
}

/* Add interface to tail of rx poll list. This assumes that _prep has
 * already been called and returned 1.
 */
static inline void __netif_rx_schedule(struct net_device *dev,
                               struct napi_struct *napi)
{
      __napi_schedule(napi);
}

/* Try to reschedule poll. Called by irq handler. */

static inline void netif_rx_schedule(struct net_device *dev,
                             struct napi_struct *napi)
{
      if (netif_rx_schedule_prep(dev, napi))
            __netif_rx_schedule(dev, napi);
}

/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().  */
static inline int netif_rx_reschedule(struct net_device *dev,
                              struct napi_struct *napi)
{
      if (napi_schedule_prep(napi)) {
            __netif_rx_schedule(dev, napi);
            return 1;
      }
      return 0;
}

/* same as netif_rx_complete, except that local_irq_save(flags)
 * has already been issued
 */
static inline void __netif_rx_complete(struct net_device *dev,
                               struct napi_struct *napi)
{
      __napi_complete(napi);
}

/* Remove interface from poll list: it must be in the poll list
 * on current cpu. This primitive is called by dev->poll(), when
 * it completes the work. The device cannot be out of poll list at this
 * moment, it is BUG().
 */
static inline void netif_rx_complete(struct net_device *dev,
                             struct napi_struct *napi)
{
      unsigned long flags;

      local_irq_save(flags);
      __netif_rx_complete(dev, napi);
      local_irq_restore(flags);
}

/**
 *    netif_tx_lock - grab network device transmit lock
 *    @dev: network device
 *    @cpu: cpu number of lock owner
 *
 * Get network device transmit lock
 */
static inline void __netif_tx_lock(struct net_device *dev, int cpu)
{
      spin_lock(&dev->_xmit_lock);
      dev->xmit_lock_owner = cpu;
}

static inline void netif_tx_lock(struct net_device *dev)
{
      __netif_tx_lock(dev, smp_processor_id());
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
      spin_lock_bh(&dev->_xmit_lock);
      dev->xmit_lock_owner = smp_processor_id();
}

static inline int netif_tx_trylock(struct net_device *dev)
{
      int ok = spin_trylock(&dev->_xmit_lock);
      if (likely(ok))
            dev->xmit_lock_owner = smp_processor_id();
      return ok;
}

static inline void netif_tx_unlock(struct net_device *dev)
{
      dev->xmit_lock_owner = -1;
      spin_unlock(&dev->_xmit_lock);
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
      dev->xmit_lock_owner = -1;
      spin_unlock_bh(&dev->_xmit_lock);
}

#define HARD_TX_LOCK(dev, cpu) {                \
      if ((dev->features & NETIF_F_LLTX) == 0) {      \
            __netif_tx_lock(dev, cpu);                \
      }                                   \
}

#define HARD_TX_UNLOCK(dev) {                   \
      if ((dev->features & NETIF_F_LLTX) == 0) {      \
            netif_tx_unlock(dev);               \
      }                                   \
}

static inline void netif_tx_disable(struct net_device *dev)
{
      netif_tx_lock_bh(dev);
      netif_stop_queue(dev);
      netif_tx_unlock_bh(dev);
}

/* These functions live elsewhere (drivers/net/net_init.c, but related) */

extern void       ether_setup(struct net_device *dev);

/* Support for loadable net-drivers */
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)
extern int        register_netdev(struct net_device *dev);
extern void       unregister_netdev(struct net_device *dev);
/* 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);
extern int        dev_unicast_delete(struct net_device *dev, void *addr, int alen);
extern int        dev_unicast_add(struct net_device *dev, void *addr, int alen);
extern int        dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
extern int        dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
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 int        __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
extern int        __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
extern void       dev_set_promiscuity(struct net_device *dev, int inc);
extern void       dev_set_allmulti(struct net_device *dev, int inc);
extern void       netdev_state_change(struct net_device *dev);
extern void       netdev_features_change(struct net_device *dev);
/* Load a device via the kmod */
extern void       dev_load(struct net *net, const char *name);
extern void       dev_mcast_init(void);
extern int        netdev_max_backlog;
extern int        weight_p;
extern int        netdev_set_master(struct net_device *dev, struct net_device *master);
extern int skb_checksum_help(struct sk_buff *skb);
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
#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
/* rx skb timestamps */
extern void       net_enable_timestamp(void);
extern void       net_disable_timestamp(void);

#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

extern void linkwatch_run_queue(void);

extern int netdev_compute_features(unsigned long all, unsigned long one);

static inline int net_gso_ok(int features, int gso_type)
{
      int feature = gso_type << NETIF_F_GSO_SHIFT;
      return (features & feature) == feature;
}

static inline int skb_gso_ok(struct sk_buff *skb, int features)
{
      return net_gso_ok(features, skb_shinfo(skb)->gso_type);
}

static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
{
      return skb_is_gso(skb) &&
             (!skb_gso_ok(skb, dev->features) ||
            unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
}

/* On bonding slaves other than the currently active slave, suppress
 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
 * ARP on active-backup slaves with arp_validate enabled.
 */
static inline int skb_bond_should_drop(struct sk_buff *skb)
{
      struct net_device *dev = skb->dev;
      struct net_device *master = dev->master;

      if (master &&
          (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
            if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
                skb->protocol == __constant_htons(ETH_P_ARP))
                  return 0;

            if (master->priv_flags & IFF_MASTER_ALB) {
                  if (skb->pkt_type != PACKET_BROADCAST &&
                      skb->pkt_type != PACKET_MULTICAST)
                        return 0;
            }
            if (master->priv_flags & IFF_MASTER_8023AD &&
                skb->protocol == __constant_htons(ETH_P_SLOW))
                  return 0;

            return 1;
      }
      return 0;
}

#endif /* __KERNEL__ */

#endif      /* _LINUX_DEV_H */

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