ClabureDB: Classified Bug-Reports Database

   /*
    * 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@lxorguk.ukuu.org.uk>
   *                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>
  #include <net/dsa.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_MASK                0xFFFF        /* qdisc flags in net/sch_generic.h */
  
  /* 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 */
  
  #ifdef  __KERNEL__
  
  /*
   *        Compute the worst case header length according to the protocols
   *        used.
   */
   
  #if defined(CONFIG_WLAN_80211) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
  # if defined(CONFIG_MAC80211_MESH)
  #  define LL_MAX_HEADER 128
 # else
 #  define LL_MAX_HEADER 96
 # endif
 #elif defined(CONFIG_TR)
 # define LL_MAX_HEADER 48
 #else
 # define LL_MAX_HEADER 32
 #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
 
 #endif  /*  __KERNEL__  */
 
 /*
  *        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.
  *
  * LL_ALLOCATED_SPACE also takes into account the tailroom the device
  * may need.
  */
 #define LL_RESERVED_SPACE(dev) \
         ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
         ((((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)
 
 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_START,
         __LINK_STATE_PRESENT,
         __LINK_STATE_NOCARRIER,
         __LINK_STATE_LINKWATCH_PENDING,
         __LINK_STATE_DORMANT,
 };
 
 
 /*
  * 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 */
         NAPI_STATE_NPSVC,        /* Netpoll - don't dequeue from poll_list */
 };
 
 extern void __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)
 {
         unsigned long flags;
 
         local_irq_save(flags);
         __napi_complete(n);
         local_irq_restore(flags);
 }
 
 /**
  *        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
 
 enum netdev_queue_state_t
 {
         __QUEUE_STATE_XOFF,
         __QUEUE_STATE_FROZEN,
 };
 
 struct netdev_queue {
         struct net_device        *dev;
         struct Qdisc                *qdisc;
         unsigned long                state;
         spinlock_t                _xmit_lock;
         int                        xmit_lock_owner;
         struct Qdisc                *qdisc_sleeping;
 } ____cacheline_aligned_in_smp;
 
 /*
  *        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;
         /* snmp alias */
         char                         *ifalias;
 
         /*
          *        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_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)
 
         /*
          * 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 | \
                                  NETIF_F_SG | NETIF_F_HIGHDMA | \
                                  NETIF_F_FRAGLIST)
 
         /* 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        */
 
         /* 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;
 
         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 */
 
         spinlock_t                addr_list_lock;
         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        */
         unsigned int                promiscuity;
         unsigned int                allmulti;
 
 
         /* Protocol specific pointers */
         
 #ifdef CONFIG_NET_DSA
         void                        *dsa_ptr;        /* dsa specific data */
 #endif
         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        */
 
         struct netdev_queue        rx_queue;
 
         struct netdev_queue        *_tx ____cacheline_aligned_in_smp;
 
         /* Number of TX queues allocated at alloc_netdev_mq() time  */
         unsigned int                num_tx_queues;
 
         /* Number of TX queues currently active in device  */
         unsigned int                real_num_tx_queues;
 
         unsigned long                tx_queue_len;        /* Max frames per queue allowed */
         spinlock_t                tx_global_lock;
 /*
  * One part is mostly used on xmit path (device)
  */
         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
 
         u16                        (*select_queue)(struct net_device *dev,
                                                 struct sk_buff *skb);
 
 #ifdef CONFIG_NET_NS
         /* Network namespace this network device is inside */
         struct net                *nd_net;
 #endif
 
         /* mid-layer private */
         void                        *ml_priv;
 
         /* bridge stuff */
         struct net_bridge_port        *br_port;
         /* macvlan */
         struct macvlan_port        *macvlan_port;
         /* GARP */
         struct garp_port        *garp_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;
 
         /* VLAN feature mask */
         unsigned long vlan_features;
 
         /* for setting kernel sock attribute on TCP connection setup */
 #define GSO_MAX_SIZE                65536
         unsigned int                gso_max_size;
 };
 #define to_net_dev(d) container_of(d, struct net_device, dev)
 
 #define        NETDEV_ALIGN                32
 #define        NETDEV_ALIGN_CONST        (NETDEV_ALIGN - 1)
 
 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);
 }
 
 /*
  * Net namespace inlines
  */
 static inline
 struct net *dev_net(const struct net_device *dev)
 {
 #ifdef CONFIG_NET_NS
         return dev->nd_net;
 #else
         return &init_net;
 #endif
 }
 
 static inline
 void dev_net_set(struct net_device *dev, struct net *net)
 {
 #ifdef CONFIG_NET_NS
         release_net(dev->nd_net);
         dev->nd_net = hold_net(net);
 #endif
 }
 
 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;
 }
 
 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;
 }
 
 /**
  *        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 (char *)dev + ((sizeof(struct net_device)
                                + NETDEV_ALIGN_CONST)
                               & ~NETDEV_ALIGN_CONST);
 }
 
 /* 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);
 }
 
 /**
  *  netif_napi_del - remove a napi context
  *  @napi: napi context
  *
  *  netif_napi_del() removes a napi context from the network device napi list
  */
 static inline void netif_napi_del(struct napi_struct *napi)
 {
 #ifdef CONFIG_NETPOLL
         list_del(&napi->dev_list);
 #endif
 }
 
 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_net(dev);
         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 void                dev_disable_lro(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 Qdisc                *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 Qdisc *q);

static inline void netif_schedule_queue(struct netdev_queue *txq)
{
        if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
                __netif_schedule(txq->qdisc);
}

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));
}

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

/**
 *        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)
{
        netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
}

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);
        }
}

static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
{
#ifdef CONFIG_NETPOLL_TRAP
        if (netpoll_trap()) {
                clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
                return;
        }
#endif
        if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
                __netif_schedule(dev_queue->qdisc);
}

/**
 *        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)
{
        netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
}

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);
        }
}

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

/**
 *        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)
{
        netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
}

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);
        }
}

static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{
        return test_bit(__QUEUE_STATE_XOFF, &dev_queue->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 netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
}

static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
{
        return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->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)
{
        struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
        clear_bit(__QUEUE_STATE_XOFF, &txq->state);
}

/**
 *        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)
{
        struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
#ifdef CONFIG_NETPOLL_TRAP
        if (netpoll_trap())
                return;
#endif
        set_bit(__QUEUE_STATE_XOFF, &txq->state);
}

/**
 *        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)
{
        struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
        return test_bit(__QUEUE_STATE_XOFF, &txq->state);
}

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)
{
        struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
#ifdef CONFIG_NETPOLL_TRAP
        if (netpoll_trap())
                return;
#endif
        if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
                __netif_schedule(txq->qdisc);
}

/**
 *        netif_is_multiqueue - test if device has multiple transmit queues
 *        @dev: network device
 *
 * Check if device has multiple transmit queues
 */
static inline int netif_is_multiqueue(const struct net_device *dev)
{
        return (dev->num_tx_queues > 1);
}

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

/* Use this variant in places where it could be invoked
 * from either hardware interrupt or other context, with hardware interrupts
 * either disabled or enabled.
 */
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 void                netif_nit_deliver(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 *, const char *);
extern int                dev_set_alias(struct net_device *, const char *, size_t);
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,
                                            struct netdev_queue *txq);

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;

        /*
         * don't let napi dequeue from the cpu poll list
         * just in case its running on a different cpu
         */
        if (unlikely(test_bit(NAPI_STATE_NPSVC, &napi->state)))
                return;
        local_irq_save(flags);
        __netif_rx_complete(dev, napi);
        local_irq_restore(flags);
}

static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
{
        spin_lock(&txq->_xmit_lock);
        txq->xmit_lock_owner = cpu;
}

static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
{
        spin_lock_bh(&txq->_xmit_lock);
        txq->xmit_lock_owner = smp_processor_id();
}

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);
}

/**
 *        netif_tx_lock - grab network device transmit lock
 *        @dev: network device
 *
 * Get network device transmit lock
 */
static inline void netif_tx_lock(struct net_device *dev)
{
        unsigned int i;
        int cpu;

        spin_lock(&dev->tx_global_lock);
        cpu = smp_processor_id();
        for (i = 0; i < dev->num_tx_queues; i++) {
                struct netdev_queue *txq = netdev_get_tx_queue(dev, i);

                /* 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.
                 */
                __netif_tx_lock(txq, cpu);
                set_bit(__QUEUE_STATE_FROZEN, &txq->state);
                __netif_tx_unlock(txq);
        }
}

static inline void netif_tx_lock_bh(struct net_device *dev)
{
        local_bh_disable();
        netif_tx_lock(dev);
}

static inline void netif_tx_unlock(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);

                /* 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);
                if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
                        __netif_schedule(txq->qdisc);
        }
        spin_unlock(&dev->tx_global_lock);
}

static inline void netif_tx_unlock_bh(struct net_device *dev)
{
        netif_tx_unlock(dev);
        local_bh_enable();
}

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

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

static inline void netif_tx_disable(struct net_device *dev)
{
        unsigned int i;
        int cpu;

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

                __netif_tx_lock(txq, cpu);
                netif_tx_stop_queue(txq);
                __netif_tx_unlock(txq);
        }
        local_bh_enable();
}

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);
}

/* 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_unicast_sync(struct net_device *to, struct net_device *from);
extern void                dev_unicast_unsync(struct net_device *to, struct net_device *from);
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 int                __dev_addr_sync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
extern void                __dev_addr_unsync(struct dev_addr_list **to, int *to_count, struct dev_addr_list **from, int *from_count);
extern int                dev_set_promiscuity(struct net_device *dev, int inc);
extern int                dev_set_allmulti(struct net_device *dev, int inc);
extern void                netdev_state_change(struct net_device *dev);
extern void                netdev_bonding_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 int netdev_class_create_file(struct class_attribute *class_attr);
extern void netdev_class_remove_file(struct class_attribute *class_attr);

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

extern void linkwatch_run_queue(void);

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);

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));
}

static inline void netif_set_gso_max_size(struct net_device *dev,
                                          unsigned int size)
{
        dev->gso_max_size = size;
}

/* 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 */