2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Interfaces handler.
8 * Version: @(#)dev.h 1.0.10 08/12/93
10 * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
23 * Moved to /usr/include/linux for NET3
25 #ifndef _LINUX_NETDEVICE_H
26 #define _LINUX_NETDEVICE_H
29 #include <linux/if_ether.h>
30 #include <linux/if_packet.h>
33 #include <asm/atomic.h>
34 #include <asm/cache.h>
35 #include <asm/byteorder.h>
37 #include <linux/config.h>
38 #include <linux/device.h>
39 #include <linux/percpu.h>
45 /* source back-compat hooks */
46 #define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
49 #define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51 #define HAVE_FREE_NETDEV /* free_netdev() */
52 #define HAVE_NETDEV_PRIV /* netdev_priv() */
54 #define NET_XMIT_SUCCESS 0
55 #define NET_XMIT_DROP 1 /* skb dropped */
56 #define NET_XMIT_CN 2 /* congestion notification */
57 #define NET_XMIT_POLICED 3 /* skb is shot by police */
58 #define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
62 /* Backlog congestion levels */
63 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64 #define NET_RX_DROP 1 /* packet dropped */
65 #define NET_RX_CN_LOW 2 /* storm alert, just in case */
66 #define NET_RX_CN_MOD 3 /* Storm on its way! */
67 #define NET_RX_CN_HIGH 4 /* The storm is here */
68 #define NET_RX_BAD 5 /* packet dropped due to kernel error */
70 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
74 #define MAX_ADDR_LEN 32 /* Largest hardware address length */
77 * Compute the worst case header length according to the protocols
81 #if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
82 #define LL_MAX_HEADER 32
84 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
85 #define LL_MAX_HEADER 96
87 #define LL_MAX_HEADER 48
91 #if !defined(CONFIG_NET_IPIP) && \
92 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
93 #define MAX_HEADER LL_MAX_HEADER
95 #define MAX_HEADER (LL_MAX_HEADER + 48)
99 * Network device statistics. Akin to the 2.0 ether stats but
100 * with byte counters.
103 struct net_device_stats
105 unsigned long rx_packets; /* total packets received */
106 unsigned long tx_packets; /* total packets transmitted */
107 unsigned long rx_bytes; /* total bytes received */
108 unsigned long tx_bytes; /* total bytes transmitted */
109 unsigned long rx_errors; /* bad packets received */
110 unsigned long tx_errors; /* packet transmit problems */
111 unsigned long rx_dropped; /* no space in linux buffers */
112 unsigned long tx_dropped; /* no space available in linux */
113 unsigned long multicast; /* multicast packets received */
114 unsigned long collisions;
116 /* detailed rx_errors: */
117 unsigned long rx_length_errors;
118 unsigned long rx_over_errors; /* receiver ring buff overflow */
119 unsigned long rx_crc_errors; /* recved pkt with crc error */
120 unsigned long rx_frame_errors; /* recv'd frame alignment error */
121 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
122 unsigned long rx_missed_errors; /* receiver missed packet */
124 /* detailed tx_errors */
125 unsigned long tx_aborted_errors;
126 unsigned long tx_carrier_errors;
127 unsigned long tx_fifo_errors;
128 unsigned long tx_heartbeat_errors;
129 unsigned long tx_window_errors;
132 unsigned long rx_compressed;
133 unsigned long tx_compressed;
137 /* Media selection options. */
150 #include <linux/cache.h>
151 #include <linux/skbuff.h>
157 struct netif_rx_stats
161 unsigned time_squeeze;
163 unsigned fastroute_hit;
164 unsigned fastroute_success;
165 unsigned fastroute_defer;
166 unsigned fastroute_deferred_out;
167 unsigned fastroute_latency_reduction;
168 unsigned cpu_collision;
171 DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
175 * We tag multicasts with these structures.
180 struct dev_mc_list *next;
181 __u8 dmi_addr[MAX_ADDR_LEN];
182 unsigned char dmi_addrlen;
189 struct hh_cache *hh_next; /* Next entry */
190 atomic_t hh_refcnt; /* number of users */
191 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
192 * NOTE: For VLANs, this will be the
193 * encapuslated type. --BLG
195 int hh_len; /* length of header */
196 int (*hh_output)(struct sk_buff *skb);
199 /* cached hardware header; allow for machine alignment needs. */
200 #define HH_DATA_MOD 16
201 #define HH_DATA_OFF(__len) \
202 (HH_DATA_MOD - ((__len) & (HH_DATA_MOD - 1)))
203 #define HH_DATA_ALIGN(__len) \
204 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
205 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
208 /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
210 * dev->hard_header_len ? (dev->hard_header_len +
211 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
213 * We could use other alignment values, but we must maintain the
214 * relationship HH alignment <= LL alignment.
216 #define LL_RESERVED_SPACE(dev) \
217 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
218 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
219 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
221 /* These flag bits are private to the generic network queueing
222 * layer, they may not be explicitly referenced by any other
230 __LINK_STATE_PRESENT,
232 __LINK_STATE_NOCARRIER,
233 __LINK_STATE_RX_SCHED,
234 __LINK_STATE_LINKWATCH_PENDING
239 * This structure holds at boot time configured netdevice settings. They
240 * are then used in the device probing.
242 struct netdev_boot_setup {
246 #define NETDEV_BOOT_SETUP_MAX 8
250 * The DEVICE structure.
251 * Actually, this whole structure is a big mistake. It mixes I/O
252 * data with strictly "high-level" data, and it has to know about
253 * almost every data structure used in the INET module.
255 * FIXME: cleanup struct net_device such that network protocol info
263 * This is the first field of the "visible" part of this structure
264 * (i.e. as seen by users in the "Space.c" file). It is the name
270 * I/O specific fields
271 * FIXME: Merge these and struct ifmap into one
273 unsigned long mem_end; /* shared mem end */
274 unsigned long mem_start; /* shared mem start */
275 unsigned long base_addr; /* device I/O address */
276 unsigned int irq; /* device IRQ number */
279 * Some hardware also needs these fields, but they are not
280 * part of the usual set specified in Space.c.
283 unsigned char if_port; /* Selectable AUI, TP,..*/
284 unsigned char dma; /* DMA channel */
288 struct net_device *next;
290 /* The device initialization function. Called only once. */
291 int (*init)(struct net_device *dev);
293 /* ------- Fields preinitialized in Space.c finish here ------- */
295 struct net_device *next_sched;
297 /* Interface index. Unique device identifier */
302 struct net_device_stats* (*get_stats)(struct net_device *dev);
303 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
305 /* List of functions to handle Wireless Extensions (instead of ioctl).
306 * See <net/iw_handler.h> for details. Jean II */
307 struct iw_handler_def * wireless_handlers;
309 struct ethtool_ops *ethtool_ops;
312 * This marks the end of the "visible" part of the structure. All
313 * fields hereafter are internal to the system, and may change at
314 * will (read: may be cleaned up at will).
317 /* These may be needed for future network-power-down code. */
318 unsigned long trans_start; /* Time (in jiffies) of last Tx */
319 unsigned long last_rx; /* Time of last Rx */
321 unsigned short flags; /* interface flags (a la BSD) */
322 unsigned short gflags;
323 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
324 unsigned short unused_alignment_fixer; /* Because we need priv_flags,
325 * and we want to be 32-bit aligned.
328 unsigned mtu; /* interface MTU value */
329 unsigned short type; /* interface hardware type */
330 unsigned short hard_header_len; /* hardware hdr length */
331 void *priv; /* pointer to private data */
333 struct net_device *master; /* Pointer to master device of a group,
334 * which this device is member of.
337 /* Interface address info. */
338 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
339 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
340 unsigned char addr_len; /* hardware address length */
342 struct dev_mc_list *mc_list; /* Multicast mac addresses */
343 int mc_count; /* Number of installed mcasts */
348 struct timer_list watchdog_timer;
350 /* Protocol specific pointers */
352 void *atalk_ptr; /* AppleTalk link */
353 void *ip_ptr; /* IPv4 specific data */
354 void *dn_ptr; /* DECnet specific data */
355 void *ip6_ptr; /* IPv6 specific data */
356 void *ec_ptr; /* Econet specific data */
357 void *ax25_ptr; /* AX.25 specific data */
359 struct list_head poll_list; /* Link to poll list */
364 struct Qdisc *qdisc_sleeping;
365 struct Qdisc *qdisc_list;
366 struct Qdisc *qdisc_ingress;
367 unsigned long tx_queue_len; /* Max frames per queue allowed */
369 /* ingress path synchronizer */
370 spinlock_t ingress_lock;
371 /* hard_start_xmit synchronizer */
372 spinlock_t xmit_lock;
373 /* cpu id of processor entered to hard_start_xmit or -1,
374 if nobody entered there.
377 /* device queue lock */
378 spinlock_t queue_lock;
379 /* Number of references to this device */
381 /* delayed register/unregister */
382 struct list_head todo_list;
383 /* device name hash chain */
384 struct hlist_node name_hlist;
385 /* device index hash chain */
386 struct hlist_node index_hlist;
388 /* register/unregister state machine */
389 enum { NETREG_UNINITIALIZED=0,
390 NETREG_REGISTERING, /* called register_netdevice */
391 NETREG_REGISTERED, /* completed register todo */
392 NETREG_UNREGISTERING, /* called unregister_netdevice */
393 NETREG_UNREGISTERED, /* completed unregister todo */
394 NETREG_RELEASED, /* called free_netdev */
397 /* Net device features */
399 #define NETIF_F_SG 1 /* Scatter/gather IO. */
400 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
401 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
402 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
403 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
404 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
405 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
406 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
407 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
408 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
409 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
410 #define NETIF_F_LLTX 4096 /* LockLess TX */
412 /* Called after device is detached from network. */
413 void (*uninit)(struct net_device *dev);
414 /* Called after last user reference disappears. */
415 void (*destructor)(struct net_device *dev);
417 /* Pointers to interface service routines. */
418 int (*open)(struct net_device *dev);
419 int (*stop)(struct net_device *dev);
420 int (*hard_start_xmit) (struct sk_buff *skb,
421 struct net_device *dev);
422 #define HAVE_NETDEV_POLL
423 int (*poll) (struct net_device *dev, int *quota);
424 int (*hard_header) (struct sk_buff *skb,
425 struct net_device *dev,
430 int (*rebuild_header)(struct sk_buff *skb);
431 #define HAVE_MULTICAST
432 void (*set_multicast_list)(struct net_device *dev);
433 #define HAVE_SET_MAC_ADDR
434 int (*set_mac_address)(struct net_device *dev,
436 #define HAVE_PRIVATE_IOCTL
437 int (*do_ioctl)(struct net_device *dev,
438 struct ifreq *ifr, int cmd);
439 #define HAVE_SET_CONFIG
440 int (*set_config)(struct net_device *dev,
442 #define HAVE_HEADER_CACHE
443 int (*hard_header_cache)(struct neighbour *neigh,
444 struct hh_cache *hh);
445 void (*header_cache_update)(struct hh_cache *hh,
446 struct net_device *dev,
447 unsigned char * haddr);
448 #define HAVE_CHANGE_MTU
449 int (*change_mtu)(struct net_device *dev, int new_mtu);
451 #define HAVE_TX_TIMEOUT
452 void (*tx_timeout) (struct net_device *dev);
454 void (*vlan_rx_register)(struct net_device *dev,
455 struct vlan_group *grp);
456 void (*vlan_rx_add_vid)(struct net_device *dev,
458 void (*vlan_rx_kill_vid)(struct net_device *dev,
461 int (*hard_header_parse)(struct sk_buff *skb,
462 unsigned char *haddr);
463 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
464 int (*accept_fastpath)(struct net_device *, struct dst_entry*);
465 #ifdef CONFIG_NETPOLL
468 #ifdef CONFIG_NET_POLL_CONTROLLER
469 void (*poll_controller)(struct net_device *dev);
473 struct net_bridge_port *br_port;
475 #ifdef CONFIG_NET_FASTROUTE
476 #define NETDEV_FASTROUTE_HMASK 0xF
477 /* Semi-private data. Keep it at the end of device struct. */
478 rwlock_t fastpath_lock;
479 struct dst_entry *fastpath[NETDEV_FASTROUTE_HMASK+1];
481 #ifdef CONFIG_NET_DIVERT
482 /* this will get initialized at each interface type init routine */
483 struct divert_blk *divert;
484 #endif /* CONFIG_NET_DIVERT */
486 /* class/net/name entry */
487 struct class_device class_dev;
488 struct net_device_stats* (*last_stats)(struct net_device *);
489 /* how much padding had been added by alloc_netdev() */
493 #define NETDEV_ALIGN 32
494 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
496 static inline void *netdev_priv(struct net_device *dev)
498 return (char *)dev + ((sizeof(struct net_device)
499 + NETDEV_ALIGN_CONST)
500 & ~NETDEV_ALIGN_CONST);
503 #define SET_MODULE_OWNER(dev) do { } while (0)
504 /* Set the sysfs physical device reference for the network logical device
505 * if set prior to registration will cause a symlink during initialization.
507 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
510 unsigned short type; /* This is really htons(ether_type). */
511 struct net_device *dev; /* NULL is wildcarded here */
512 int (*func) (struct sk_buff *, struct net_device *,
513 struct packet_type *);
514 void *af_packet_priv;
515 struct list_head list;
518 #include <linux/interrupt.h>
519 #include <linux/notifier.h>
521 extern struct net_device loopback_dev; /* The loopback */
522 extern struct net_device *dev_base; /* All devices */
523 extern rwlock_t dev_base_lock; /* Device list lock */
525 extern int netdev_boot_setup_add(char *name, struct ifmap *map);
526 extern int netdev_boot_setup_check(struct net_device *dev);
527 extern unsigned long netdev_boot_base(const char *prefix, int unit);
528 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
529 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
530 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
531 extern void dev_add_pack(struct packet_type *pt);
532 extern void dev_remove_pack(struct packet_type *pt);
533 extern void __dev_remove_pack(struct packet_type *pt);
534 extern int __dev_get(const char *name);
535 static inline int __deprecated dev_get(const char *name)
537 return __dev_get(name);
539 extern struct net_device *dev_get_by_flags(unsigned short flags,
540 unsigned short mask);
541 extern struct net_device *__dev_get_by_flags(unsigned short flags,
542 unsigned short mask);
543 extern struct net_device *dev_get_by_name(const char *name);
544 extern struct net_device *__dev_get_by_name(const char *name);
545 extern int dev_alloc_name(struct net_device *dev, const char *name);
546 extern int dev_open(struct net_device *dev);
547 extern int dev_close(struct net_device *dev);
548 extern int dev_queue_xmit(struct sk_buff *skb);
549 extern int register_netdevice(struct net_device *dev);
550 extern int unregister_netdevice(struct net_device *dev);
551 extern void free_netdev(struct net_device *dev);
552 extern void synchronize_net(void);
553 extern int register_netdevice_notifier(struct notifier_block *nb);
554 extern int unregister_netdevice_notifier(struct notifier_block *nb);
555 extern int call_netdevice_notifiers(unsigned long val, void *v);
556 extern int dev_new_index(void);
557 extern struct net_device *dev_get_by_index(int ifindex);
558 extern struct net_device *__dev_get_by_index(int ifindex);
559 extern int dev_restart(struct net_device *dev);
560 #ifdef CONFIG_NETPOLL_TRAP
561 extern int netpoll_trap(void);
564 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
565 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
566 static inline int unregister_gifconf(unsigned int family)
568 return register_gifconf(family, NULL);
572 * Incoming packets are placed on per-cpu queues so that
573 * no locking is needed.
581 struct sk_buff_head input_pkt_queue;
582 struct list_head poll_list;
583 struct net_device *output_queue;
584 struct sk_buff *completion_queue;
586 struct net_device backlog_dev; /* Sorry. 8) */
589 DECLARE_PER_CPU(struct softnet_data,softnet_data);
591 #define HAVE_NETIF_QUEUE
593 static inline void __netif_schedule(struct net_device *dev)
595 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
597 struct softnet_data *sd;
599 local_irq_save(flags);
600 sd = &__get_cpu_var(softnet_data);
601 dev->next_sched = sd->output_queue;
602 sd->output_queue = dev;
603 raise_softirq_irqoff(NET_TX_SOFTIRQ);
604 local_irq_restore(flags);
608 static inline void netif_schedule(struct net_device *dev)
610 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
611 __netif_schedule(dev);
614 static inline void netif_start_queue(struct net_device *dev)
616 clear_bit(__LINK_STATE_XOFF, &dev->state);
619 static inline void netif_wake_queue(struct net_device *dev)
621 #ifdef CONFIG_NETPOLL_TRAP
625 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
626 __netif_schedule(dev);
629 static inline void netif_stop_queue(struct net_device *dev)
631 #ifdef CONFIG_NETPOLL_TRAP
635 set_bit(__LINK_STATE_XOFF, &dev->state);
638 static inline int netif_queue_stopped(const struct net_device *dev)
640 return test_bit(__LINK_STATE_XOFF, &dev->state);
643 static inline int netif_running(const struct net_device *dev)
645 return test_bit(__LINK_STATE_START, &dev->state);
649 /* Use this variant when it is known for sure that it
650 * is executing from interrupt context.
652 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
654 if (atomic_dec_and_test(&skb->users)) {
655 struct softnet_data *sd;
658 local_irq_save(flags);
659 sd = &__get_cpu_var(softnet_data);
660 skb->next = sd->completion_queue;
661 sd->completion_queue = skb;
662 raise_softirq_irqoff(NET_TX_SOFTIRQ);
663 local_irq_restore(flags);
667 /* Use this variant in places where it could be invoked
668 * either from interrupt or non-interrupt context.
670 static inline void dev_kfree_skb_any(struct sk_buff *skb)
672 if (in_irq() || irqs_disabled())
673 dev_kfree_skb_irq(skb);
678 #define HAVE_NETIF_RX 1
679 extern int netif_rx(struct sk_buff *skb);
680 #define HAVE_NETIF_RECEIVE_SKB 1
681 extern int netif_receive_skb(struct sk_buff *skb);
682 extern int dev_ioctl(unsigned int cmd, void __user *);
683 extern int dev_ethtool(struct ifreq *);
684 extern unsigned dev_get_flags(const struct net_device *);
685 extern int dev_change_flags(struct net_device *, unsigned);
686 extern int dev_set_mtu(struct net_device *, int);
687 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
689 extern void dev_init(void);
691 extern int netdev_nit;
693 /* netconsole rx hook registration */
694 extern int netdump_register_hooks(int (*)(struct sk_buff *),
695 int (*)(struct sk_buff *),
696 void (*)(struct pt_regs *));
697 extern void netdump_unregister_hooks(void);
699 /* Post buffer to the network code from _non interrupt_ context.
700 * see net/core/dev.c for netif_rx description.
702 static inline int netif_rx_ni(struct sk_buff *skb)
704 int err = netif_rx(skb);
705 if (softirq_pending(smp_processor_id()))
710 /* Called by rtnetlink.c:rtnl_unlock() */
711 extern void netdev_run_todo(void);
713 static inline void dev_put(struct net_device *dev)
715 atomic_dec(&dev->refcnt);
718 #define __dev_put(dev) atomic_dec(&(dev)->refcnt)
719 #define dev_hold(dev) atomic_inc(&(dev)->refcnt)
721 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
722 * and _off may be called from IRQ context, but it is caller
723 * who is responsible for serialization of these calls.
726 extern void linkwatch_fire_event(struct net_device *dev);
728 static inline int netif_carrier_ok(const struct net_device *dev)
730 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
733 extern void __netdev_watchdog_up(struct net_device *dev);
735 static inline void netif_carrier_on(struct net_device *dev)
737 if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
738 linkwatch_fire_event(dev);
739 if (netif_running(dev))
740 __netdev_watchdog_up(dev);
743 static inline void netif_carrier_off(struct net_device *dev)
745 if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
746 linkwatch_fire_event(dev);
750 static inline int netif_device_present(struct net_device *dev)
752 return test_bit(__LINK_STATE_PRESENT, &dev->state);
755 static inline void netif_device_detach(struct net_device *dev)
757 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
758 netif_running(dev)) {
759 netif_stop_queue(dev);
763 static inline void netif_device_attach(struct net_device *dev)
765 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
766 netif_running(dev)) {
767 netif_wake_queue(dev);
768 __netdev_watchdog_up(dev);
773 * Network interface message level settings
775 #define HAVE_NETIF_MSG 1
778 NETIF_MSG_DRV = 0x0001,
779 NETIF_MSG_PROBE = 0x0002,
780 NETIF_MSG_LINK = 0x0004,
781 NETIF_MSG_TIMER = 0x0008,
782 NETIF_MSG_IFDOWN = 0x0010,
783 NETIF_MSG_IFUP = 0x0020,
784 NETIF_MSG_RX_ERR = 0x0040,
785 NETIF_MSG_TX_ERR = 0x0080,
786 NETIF_MSG_TX_QUEUED = 0x0100,
787 NETIF_MSG_INTR = 0x0200,
788 NETIF_MSG_TX_DONE = 0x0400,
789 NETIF_MSG_RX_STATUS = 0x0800,
790 NETIF_MSG_PKTDATA = 0x1000,
791 NETIF_MSG_HW = 0x2000,
792 NETIF_MSG_WOL = 0x4000,
795 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
796 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
797 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
798 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
799 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
800 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
801 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
802 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
803 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
804 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
805 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
806 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
807 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
808 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
809 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
811 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
814 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
815 return default_msg_enable_bits;
816 if (debug_value == 0) /* no output */
819 return (1 << debug_value) - 1;
822 /* Schedule rx intr now? */
824 static inline int netif_rx_schedule_prep(struct net_device *dev)
826 return netif_running(dev) &&
827 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
830 /* Add interface to tail of rx poll list. This assumes that _prep has
831 * already been called and returned 1.
834 static inline void __netif_rx_schedule(struct net_device *dev)
838 local_irq_save(flags);
840 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
842 dev->quota += dev->weight;
844 dev->quota = dev->weight;
845 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
846 local_irq_restore(flags);
849 /* Try to reschedule poll. Called by irq handler. */
851 static inline void netif_rx_schedule(struct net_device *dev)
853 if (netif_rx_schedule_prep(dev))
854 __netif_rx_schedule(dev);
857 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
858 * Do not inline this?
860 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
862 if (netif_rx_schedule_prep(dev)) {
867 local_irq_save(flags);
868 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
869 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
870 local_irq_restore(flags);
876 /* Remove interface from poll list: it must be in the poll list
877 * on current cpu. This primitive is called by dev->poll(), when
878 * it completes the work. The device cannot be out of poll list at this
879 * moment, it is BUG().
881 static inline void netif_rx_complete(struct net_device *dev)
885 local_irq_save(flags);
886 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
887 list_del(&dev->poll_list);
888 smp_mb__before_clear_bit();
889 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
890 local_irq_restore(flags);
893 static inline void netif_poll_disable(struct net_device *dev)
895 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
897 current->state = TASK_INTERRUPTIBLE;
902 static inline void netif_poll_enable(struct net_device *dev)
904 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
907 /* same as netif_rx_complete, except that local_irq_save(flags)
908 * has already been issued
910 static inline void __netif_rx_complete(struct net_device *dev)
912 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
913 list_del(&dev->poll_list);
914 smp_mb__before_clear_bit();
915 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
918 static inline void netif_tx_disable(struct net_device *dev)
920 spin_lock_bh(&dev->xmit_lock);
921 netif_stop_queue(dev);
922 spin_unlock_bh(&dev->xmit_lock);
925 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
927 extern void ether_setup(struct net_device *dev);
928 extern void fddi_setup(struct net_device *dev);
929 extern void tr_setup(struct net_device *dev);
930 extern void fc_setup(struct net_device *dev);
931 extern void fc_freedev(struct net_device *dev);
932 /* Support for loadable net-drivers */
933 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
934 void (*setup)(struct net_device *));
935 extern int register_netdev(struct net_device *dev);
936 extern void unregister_netdev(struct net_device *dev);
937 /* Functions used for multicast support */
938 extern void dev_mc_upload(struct net_device *dev);
939 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
940 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
941 extern void dev_mc_discard(struct net_device *dev);
942 extern void dev_set_promiscuity(struct net_device *dev, int inc);
943 extern void dev_set_allmulti(struct net_device *dev, int inc);
944 extern void netdev_state_change(struct net_device *dev);
945 /* Load a device via the kmod */
946 extern void dev_load(const char *name);
947 extern void dev_mcast_init(void);
948 extern int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev));
949 extern void netdev_unregister_fc(int bit);
950 extern int netdev_max_backlog;
952 extern unsigned long netdev_fc_xoff;
953 extern atomic_t netdev_dropping;
954 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
955 extern int skb_checksum_help(struct sk_buff **pskb, int inward);
956 #ifdef CONFIG_NET_FASTROUTE
957 extern int netdev_fastroute;
958 extern int netdev_fastroute_obstacles;
959 extern void dev_clear_fastroute(struct net_device *dev);
963 extern char *net_sysctl_strdup(const char *s);
966 #endif /* __KERNEL__ */
968 #endif /* _LINUX_DEV_H */