netdevice.h
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上传日期:2009-04-28
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- /*
- * INET An implementation of the TCP/IP protocol suite for the LINUX
- * operating system. INET is implemented using the BSD Socket
- * interface as the means of communication with the user level.
- *
- * Definitions for the Interfaces handler.
- *
- * Version: @(#)dev.h 1.0.10 08/12/93
- *
- * 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 <asm/atomic.h>
- #include <asm/cache.h>
- #include <asm/byteorder.h>
- #include <linux/config.h>
- #include <linux/device.h>
- #include <linux/percpu.h>
- struct divert_blk;
- struct vlan_group;
- struct ethtool_ops;
- struct netpoll_info;
- /* 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 */
- #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_IPV6) && !defined(CONFIG_IPV6_MODULE)
- #define MAX_HEADER LL_MAX_HEADER
- #else
- #define MAX_HEADER (LL_MAX_HEADER + 48)
- #endif
- /*
- * 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);
- /*
- * We tag multicasts with these structures.
- */
-
- struct dev_mc_list
- {
- struct dev_mc_list *next;
- __u8 dmi_addr[MAX_ADDR_LEN];
- unsigned char dmi_addrlen;
- int dmi_users;
- int dmi_gusers;
- };
- struct hh_cache
- {
- struct hh_cache *hh_next; /* Next entry */
- atomic_t hh_refcnt; /* number of users */
- unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
- * NOTE: For VLANs, this will be the
- * encapuslated type. --BLG
- */
- int hh_len; /* length of header */
- int (*hh_output)(struct sk_buff *skb);
- rwlock_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)
- /* 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_RX_SCHED,
- __LINK_STATE_LINKWATCH_PENDING
- };
- /*
- * 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);
- /*
- * 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 net_device *next;
-
- /* 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 only 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_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_TSO 2048 /* Can offload TCP/IP segmentation */
- #define NETIF_F_LLTX 4096 /* LockLess TX */
- 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 iw_statistics* (*get_wireless_stats)(struct net_device *dev);
- /* 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;
- struct ethtool_ops *ethtool_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 short 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 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_mc_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 */
- /*
- * Cache line mostly used on receive path (including eth_type_trans())
- */
- struct list_head poll_list ____cacheline_aligned_in_smp;
- /* Link to poll list */
- int (*poll) (struct net_device *dev, int *quota);
- int quota;
- int weight;
- 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 */
- /* 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;
- /* register/unregister state machine */
- enum { NETREG_UNINITIALIZED=0,
- NETREG_REGISTERING, /* called register_netdevice */
- NETREG_REGISTERED, /* completed register todo */
- 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
- int (*hard_header) (struct sk_buff *skb,
- struct net_device *dev,
- unsigned short type,
- void *daddr,
- void *saddr,
- unsigned len);
- int (*rebuild_header)(struct sk_buff *skb);
- #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_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_HEADER_CACHE
- int (*hard_header_cache)(struct neighbour *neigh,
- struct hh_cache *hh);
- void (*header_cache_update)(struct hh_cache *hh,
- struct net_device *dev,
- unsigned char * haddr);
- #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 (*hard_header_parse)(struct sk_buff *skb,
- unsigned char *haddr);
- 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
- /* bridge stuff */
- struct net_bridge_port *br_port;
- #ifdef CONFIG_NET_DIVERT
- /* this will get initialized at each interface type init routine */
- struct divert_blk *divert;
- #endif /* CONFIG_NET_DIVERT */
- /* class/net/name entry */
- struct class_device class_dev;
- };
- #define NETDEV_ALIGN 32
- #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
- static inline void *netdev_priv(struct net_device *dev)
- {
- return (char *)dev + ((sizeof(struct net_device)
- + NETDEV_ALIGN_CONST)
- & ~NETDEV_ALIGN_CONST);
- }
- #define SET_MODULE_OWNER(dev) do { } while (0)
- /* 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)->class_dev.dev = (pdev))
- 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 *);
- void *af_packet_priv;
- struct list_head list;
- };
- #include <linux/interrupt.h>
- #include <linux/notifier.h>
- extern struct net_device loopback_dev; /* The loopback */
- extern struct net_device *dev_base; /* All devices */
- extern rwlock_t dev_base_lock; /* Device list lock */
- 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(unsigned short type, char *hwaddr);
- extern struct net_device *dev_getfirstbyhwtype(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(unsigned short flags,
- unsigned short mask);
- extern struct net_device *dev_get_by_name(const char *name);
- extern struct net_device *__dev_get_by_name(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 int 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, void *v);
- extern struct net_device *dev_get_by_index(int ifindex);
- extern struct net_device *__dev_get_by_index(int ifindex);
- extern int dev_restart(struct net_device *dev);
- #ifdef CONFIG_NETPOLL_TRAP
- extern int netpoll_trap(void);
- #endif
- 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 net_device backlog_dev; /* Sorry. 8) */
- };
- DECLARE_PER_CPU(struct softnet_data,softnet_data);
- #define HAVE_NETIF_QUEUE
- static inline void __netif_schedule(struct net_device *dev)
- {
- if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
- unsigned long flags;
- struct softnet_data *sd;
- local_irq_save(flags);
- sd = &__get_cpu_var(softnet_data);
- dev->next_sched = sd->output_queue;
- sd->output_queue = dev;
- raise_softirq_irqoff(NET_TX_SOFTIRQ);
- local_irq_restore(flags);
- }
- }
- static inline void netif_schedule(struct net_device *dev)
- {
- if (!test_bit(__LINK_STATE_XOFF, &dev->state))
- __netif_schedule(dev);
- }
- static inline void netif_start_queue(struct net_device *dev)
- {
- clear_bit(__LINK_STATE_XOFF, &dev->state);
- }
- static inline void netif_wake_queue(struct net_device *dev)
- {
- #ifdef CONFIG_NETPOLL_TRAP
- if (netpoll_trap())
- return;
- #endif
- if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
- __netif_schedule(dev);
- }
- static inline void netif_stop_queue(struct net_device *dev)
- {
- #ifdef CONFIG_NETPOLL_TRAP
- if (netpoll_trap())
- return;
- #endif
- set_bit(__LINK_STATE_XOFF, &dev->state);
- }
- static inline int netif_queue_stopped(const struct net_device *dev)
- {
- return test_bit(__LINK_STATE_XOFF, &dev->state);
- }
- static inline int netif_running(const struct net_device *dev)
- {
- return test_bit(__LINK_STATE_START, &dev->state);
- }
- /* Use this variant when it is known for sure that it
- * is executing from interrupt context.
- */
- static inline void dev_kfree_skb_irq(struct sk_buff *skb)
- {
- if (atomic_dec_and_test(&skb->users)) {
- struct softnet_data *sd;
- unsigned long flags;
- local_irq_save(flags);
- sd = &__get_cpu_var(softnet_data);
- skb->next = sd->completion_queue;
- sd->completion_queue = skb;
- raise_softirq_irqoff(NET_TX_SOFTIRQ);
- local_irq_restore(flags);
- }
- }
- /* Use this variant in places where it could be invoked
- * either from interrupt or non-interrupt context.
- */
- static inline void dev_kfree_skb_any(struct sk_buff *skb)
- {
- if (in_irq() || irqs_disabled())
- dev_kfree_skb_irq(skb);
- else
- dev_kfree_skb(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_ioctl(unsigned int cmd, void __user *);
- extern int dev_ethtool(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_set_mtu(struct net_device *, int);
- extern int dev_set_mac_address(struct net_device *,
- struct sockaddr *);
- extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
- extern void dev_init(void);
- extern int netdev_nit;
- extern int netdev_budget;
- /* Called by rtnetlink.c:rtnl_unlock() */
- extern void netdev_run_todo(void);
- static inline void dev_put(struct net_device *dev)
- {
- atomic_dec(&dev->refcnt);
- }
- #define __dev_put(dev) atomic_dec(&(dev)->refcnt)
- #define dev_hold(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.
- */
- extern void linkwatch_fire_event(struct net_device *dev);
- 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);
- /* Hot-plugging. */
- static inline int netif_device_present(struct net_device *dev)
- {
- return test_bit(__LINK_STATE_PRESENT, &dev->state);
- }
- static inline void netif_device_detach(struct net_device *dev)
- {
- if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
- netif_running(dev)) {
- netif_stop_queue(dev);
- }
- }
- static inline void netif_device_attach(struct net_device *dev)
- {
- if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
- netif_running(dev)) {
- netif_wake_queue(dev);
- __netdev_watchdog_up(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;
- }
- /* Schedule rx intr now? */
- static inline int netif_rx_schedule_prep(struct net_device *dev)
- {
- return netif_running(dev) &&
- !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
- }
- /* 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)
- {
- unsigned long flags;
- local_irq_save(flags);
- dev_hold(dev);
- list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
- if (dev->quota < 0)
- dev->quota += dev->weight;
- else
- dev->quota = dev->weight;
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- local_irq_restore(flags);
- }
- /* Try to reschedule poll. Called by irq handler. */
- static inline void netif_rx_schedule(struct net_device *dev)
- {
- if (netif_rx_schedule_prep(dev))
- __netif_rx_schedule(dev);
- }
- /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
- * Do not inline this?
- */
- static inline int netif_rx_reschedule(struct net_device *dev, int undo)
- {
- if (netif_rx_schedule_prep(dev)) {
- unsigned long flags;
- dev->quota += undo;
- local_irq_save(flags);
- list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
- __raise_softirq_irqoff(NET_RX_SOFTIRQ);
- local_irq_restore(flags);
- return 1;
- }
- return 0;
- }
- /* 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)
- {
- unsigned long flags;
- local_irq_save(flags);
- BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
- list_del(&dev->poll_list);
- smp_mb__before_clear_bit();
- clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
- local_irq_restore(flags);
- }
- static inline void netif_poll_disable(struct net_device *dev)
- {
- while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
- /* No hurry. */
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(1);
- }
- }
- static inline void netif_poll_enable(struct net_device *dev)
- {
- clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
- }
- /* 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)
- {
- BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
- list_del(&dev->poll_list);
- smp_mb__before_clear_bit();
- clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
- }
- static inline void netif_tx_disable(struct net_device *dev)
- {
- spin_lock_bh(&dev->xmit_lock);
- netif_stop_queue(dev);
- spin_unlock_bh(&dev->xmit_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(int sizeof_priv, const char *name,
- void (*setup)(struct net_device *));
- extern int register_netdev(struct net_device *dev);
- extern void unregister_netdev(struct net_device *dev);
- /* Functions used for multicast support */
- extern void dev_mc_upload(struct net_device *dev);
- 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 void dev_mc_discard(struct net_device *dev);
- 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(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, int inward);
- /* 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);
- #endif /* __KERNEL__ */
- #endif /* _LINUX_DEV_H */