diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 933 |
1 files changed, 933 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h new file mode 100644 index 000000000000..8d775be67833 --- /dev/null +++ b/include/linux/netdevice.h @@ -0,0 +1,933 @@ +/* + * 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, <bir7@leland.Stanford.Edu> + * 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; + /* 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 throttled; + unsigned fastroute_hit; + unsigned fastroute_success; + unsigned fastroute_defer; + unsigned fastroute_deferred_out; + unsigned fastroute_latency_reduction; + 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) & (HH_DATA_MOD - 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 + + +/* + * 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]; + + /* + * 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 ------- */ + + 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). + */ + + /* These may be needed for future network-power-down code. */ + unsigned long trans_start; /* Time (in jiffies) of last Tx */ + unsigned long last_rx; /* Time of last Rx */ + + 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 */ + void *priv; /* pointer to private data */ + + struct net_device *master; /* Pointer to master device of a group, + * which this device is member of. + */ + + /* Interface address info. */ + unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ + unsigned char dev_addr[MAX_ADDR_LEN]; /* 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; + + int watchdog_timeo; + struct timer_list watchdog_timer; + + /* Protocol specific pointers */ + + void *atalk_ptr; /* AppleTalk link */ + void *ip_ptr; /* IPv4 specific data */ + void *dn_ptr; /* DECnet specific data */ + void *ip6_ptr; /* IPv6 specific data */ + void *ec_ptr; /* Econet specific data */ + void *ax25_ptr; /* AX.25 specific data */ + + struct list_head poll_list; /* Link to poll list */ + int quota; + int weight; + + struct Qdisc *qdisc; + struct Qdisc *qdisc_sleeping; + struct Qdisc *qdisc_ingress; + struct list_head qdisc_list; + unsigned long tx_queue_len; /* Max frames per queue allowed */ + + /* ingress path synchronizer */ + spinlock_t ingress_lock; + /* hard_start_xmit synchronizer */ + spinlock_t xmit_lock; + /* cpu id of processor entered to hard_start_xmit or -1, + if nobody entered there. + */ + int xmit_lock_owner; + /* device queue lock */ + spinlock_t queue_lock; + /* Number of references to this device */ + atomic_t refcnt; + /* delayed register/unregister */ + struct list_head todo_list; + /* device name hash chain */ + struct hlist_node name_hlist; + /* 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; + + /* Net device features */ + int 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 */ + + /* 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); + int (*hard_start_xmit) (struct sk_buff *skb, + struct net_device *dev); +#define HAVE_NETDEV_POLL + int (*poll) (struct net_device *dev, int *quota); + 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 *np; +#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 { + unsigned short 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 *); + 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 +{ + int throttle; + int cng_level; + int avg_blog; + struct sk_buff_head input_pkt_queue; + struct list_head poll_list; + struct net_device *output_queue; + 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; + +/* 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); + +static inline void netif_carrier_on(struct net_device *dev) +{ + if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state)) + linkwatch_fire_event(dev); + if (netif_running(dev)) + __netdev_watchdog_up(dev); +} + +static inline void netif_carrier_off(struct net_device *dev) +{ + if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state)) + linkwatch_fire_event(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); +/* 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_SYSCTL +extern char *net_sysctl_strdup(const char *s); +#endif + +#endif /* __KERNEL__ */ + +#endif /* _LINUX_DEV_H */ |
