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)
219 /* These flag bits are private to the generic network queueing
220 * layer, they may not be explicitly referenced by any other
228 __LINK_STATE_PRESENT,
230 __LINK_STATE_NOCARRIER,
231 __LINK_STATE_RX_SCHED,
232 __LINK_STATE_LINKWATCH_PENDING
237 * This structure holds at boot time configured netdevice settings. They
238 * are then used in the device probing.
240 struct netdev_boot_setup {
244 #define NETDEV_BOOT_SETUP_MAX 8
248 * The DEVICE structure.
249 * Actually, this whole structure is a big mistake. It mixes I/O
250 * data with strictly "high-level" data, and it has to know about
251 * almost every data structure used in the INET module.
253 * FIXME: cleanup struct net_device such that network protocol info
261 * This is the first field of the "visible" part of this structure
262 * (i.e. as seen by users in the "Space.c" file). It is the name
268 * I/O specific fields
269 * FIXME: Merge these and struct ifmap into one
271 unsigned long mem_end; /* shared mem end */
272 unsigned long mem_start; /* shared mem start */
273 unsigned long base_addr; /* device I/O address */
274 unsigned int irq; /* device IRQ number */
277 * Some hardware also needs these fields, but they are not
278 * part of the usual set specified in Space.c.
281 unsigned char if_port; /* Selectable AUI, TP,..*/
282 unsigned char dma; /* DMA channel */
286 struct net_device *next;
288 /* The device initialization function. Called only once. */
289 int (*init)(struct net_device *dev);
291 /* ------- Fields preinitialized in Space.c finish here ------- */
293 struct net_device *next_sched;
295 /* Interface index. Unique device identifier */
300 struct net_device_stats* (*get_stats)(struct net_device *dev);
301 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
303 /* List of functions to handle Wireless Extensions (instead of ioctl).
304 * See <net/iw_handler.h> for details. Jean II */
305 struct iw_handler_def * wireless_handlers;
307 struct ethtool_ops *ethtool_ops;
310 * This marks the end of the "visible" part of the structure. All
311 * fields hereafter are internal to the system, and may change at
312 * will (read: may be cleaned up at will).
315 /* These may be needed for future network-power-down code. */
316 unsigned long trans_start; /* Time (in jiffies) of last Tx */
317 unsigned long last_rx; /* Time of last Rx */
319 unsigned short flags; /* interface flags (a la BSD) */
320 unsigned short gflags;
321 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
322 unsigned short unused_alignment_fixer; /* Because we need priv_flags,
323 * and we want to be 32-bit aligned.
326 unsigned mtu; /* interface MTU value */
327 unsigned short type; /* interface hardware type */
328 unsigned short hard_header_len; /* hardware hdr length */
329 void *priv; /* pointer to private data */
331 struct net_device *master; /* Pointer to master device of a group,
332 * which this device is member of.
335 /* Interface address info. */
336 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
337 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address */
338 unsigned char addr_len; /* hardware address length */
340 struct dev_mc_list *mc_list; /* Multicast mac addresses */
341 int mc_count; /* Number of installed mcasts */
346 struct timer_list watchdog_timer;
348 /* Protocol specific pointers */
350 void *atalk_ptr; /* AppleTalk link */
351 void *ip_ptr; /* IPv4 specific data */
352 void *dn_ptr; /* DECnet specific data */
353 void *ip6_ptr; /* IPv6 specific data */
354 void *ec_ptr; /* Econet specific data */
355 void *ax25_ptr; /* AX.25 specific data */
357 struct list_head poll_list; /* Link to poll list */
362 struct Qdisc *qdisc_sleeping;
363 struct Qdisc *qdisc_list;
364 struct Qdisc *qdisc_ingress;
365 unsigned long tx_queue_len; /* Max frames per queue allowed */
367 /* hard_start_xmit synchronizer */
368 spinlock_t xmit_lock;
369 /* cpu id of processor entered to hard_start_xmit or -1,
370 if nobody entered there.
373 /* device queue lock */
374 spinlock_t queue_lock;
375 /* Number of references to this device */
377 /* delayed register/unregister */
378 struct list_head todo_list;
379 /* device name hash chain */
380 struct hlist_node name_hlist;
381 /* device index hash chain */
382 struct hlist_node index_hlist;
384 /* register/unregister state machine */
385 enum { NETREG_UNINITIALIZED=0,
386 NETREG_REGISTERING, /* called register_netdevice */
387 NETREG_REGISTERED, /* completed register todo */
388 NETREG_UNREGISTERING, /* called unregister_netdevice */
389 NETREG_UNREGISTERED, /* completed unregister todo */
390 NETREG_RELEASED, /* called free_netdev */
393 /* Net device features */
395 #define NETIF_F_SG 1 /* Scatter/gather IO. */
396 #define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
397 #define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
398 #define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
399 #define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
400 #define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
401 #define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
402 #define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
403 #define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
404 #define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
405 #define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
407 /* Called after device is detached from network. */
408 void (*uninit)(struct net_device *dev);
409 /* Called after last user reference disappears. */
410 void (*destructor)(struct net_device *dev);
412 /* Pointers to interface service routines. */
413 int (*open)(struct net_device *dev);
414 int (*stop)(struct net_device *dev);
415 int (*hard_start_xmit) (struct sk_buff *skb,
416 struct net_device *dev);
417 #define HAVE_NETDEV_POLL
418 int (*poll) (struct net_device *dev, int *quota);
419 int (*hard_header) (struct sk_buff *skb,
420 struct net_device *dev,
425 int (*rebuild_header)(struct sk_buff *skb);
426 #define HAVE_MULTICAST
427 void (*set_multicast_list)(struct net_device *dev);
428 #define HAVE_SET_MAC_ADDR
429 int (*set_mac_address)(struct net_device *dev,
431 #define HAVE_PRIVATE_IOCTL
432 int (*do_ioctl)(struct net_device *dev,
433 struct ifreq *ifr, int cmd);
434 #define HAVE_SET_CONFIG
435 int (*set_config)(struct net_device *dev,
437 #define HAVE_HEADER_CACHE
438 int (*hard_header_cache)(struct neighbour *neigh,
439 struct hh_cache *hh);
440 void (*header_cache_update)(struct hh_cache *hh,
441 struct net_device *dev,
442 unsigned char * haddr);
443 #define HAVE_CHANGE_MTU
444 int (*change_mtu)(struct net_device *dev, int new_mtu);
446 #define HAVE_TX_TIMEOUT
447 void (*tx_timeout) (struct net_device *dev);
449 void (*vlan_rx_register)(struct net_device *dev,
450 struct vlan_group *grp);
451 void (*vlan_rx_add_vid)(struct net_device *dev,
453 void (*vlan_rx_kill_vid)(struct net_device *dev,
456 int (*hard_header_parse)(struct sk_buff *skb,
457 unsigned char *haddr);
458 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
459 int (*accept_fastpath)(struct net_device *, struct dst_entry*);
460 #ifdef CONFIG_NETPOLL_RX
463 #ifdef CONFIG_NET_POLL_CONTROLLER
464 void (*poll_controller)(struct net_device *dev);
468 struct net_bridge_port *br_port;
470 #ifdef CONFIG_NET_FASTROUTE
471 #define NETDEV_FASTROUTE_HMASK 0xF
472 /* Semi-private data. Keep it at the end of device struct. */
473 rwlock_t fastpath_lock;
474 struct dst_entry *fastpath[NETDEV_FASTROUTE_HMASK+1];
476 #ifdef CONFIG_NET_DIVERT
477 /* this will get initialized at each interface type init routine */
478 struct divert_blk *divert;
479 #endif /* CONFIG_NET_DIVERT */
481 /* class/net/name entry */
482 struct class_device class_dev;
483 struct net_device_stats* (*last_stats)(struct net_device *);
484 /* how much padding had been added by alloc_netdev() */
488 #define NETDEV_ALIGN 32
489 #define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
491 static inline void *netdev_priv(struct net_device *dev)
493 return (char *)dev + ((sizeof(struct net_device)
494 + NETDEV_ALIGN_CONST)
495 & ~NETDEV_ALIGN_CONST);
498 #define SET_MODULE_OWNER(dev) do { } while (0)
499 /* Set the sysfs physical device reference for the network logical device
500 * if set prior to registration will cause a symlink during initialization.
502 #define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
505 unsigned short type; /* This is really htons(ether_type). */
506 struct net_device *dev; /* NULL is wildcarded here */
507 int (*func) (struct sk_buff *, struct net_device *,
508 struct packet_type *);
509 void *af_packet_priv;
510 struct list_head list;
513 #include <linux/interrupt.h>
514 #include <linux/notifier.h>
516 extern struct net_device loopback_dev; /* The loopback */
517 extern struct net_device *dev_base; /* All devices */
518 extern rwlock_t dev_base_lock; /* Device list lock */
520 extern int netdev_boot_setup_add(char *name, struct ifmap *map);
521 extern int netdev_boot_setup_check(struct net_device *dev);
522 extern unsigned long netdev_boot_base(const char *prefix, int unit);
523 extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
524 extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
525 extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
526 extern void dev_add_pack(struct packet_type *pt);
527 extern void dev_remove_pack(struct packet_type *pt);
528 extern void __dev_remove_pack(struct packet_type *pt);
529 extern int __dev_get(const char *name);
530 static inline int __deprecated dev_get(const char *name)
532 return __dev_get(name);
534 extern struct net_device *dev_get_by_flags(unsigned short flags,
535 unsigned short mask);
536 extern struct net_device *__dev_get_by_flags(unsigned short flags,
537 unsigned short mask);
538 extern struct net_device *dev_get_by_name(const char *name);
539 extern struct net_device *__dev_get_by_name(const char *name);
540 extern int dev_alloc_name(struct net_device *dev, const char *name);
541 extern int dev_open(struct net_device *dev);
542 extern int dev_close(struct net_device *dev);
543 extern int dev_queue_xmit(struct sk_buff *skb);
544 extern int register_netdevice(struct net_device *dev);
545 extern int unregister_netdevice(struct net_device *dev);
546 extern void free_netdev(struct net_device *dev);
547 extern void synchronize_net(void);
548 extern int register_netdevice_notifier(struct notifier_block *nb);
549 extern int unregister_netdevice_notifier(struct notifier_block *nb);
550 extern int call_netdevice_notifiers(unsigned long val, void *v);
551 extern int dev_new_index(void);
552 extern struct net_device *dev_get_by_index(int ifindex);
553 extern struct net_device *__dev_get_by_index(int ifindex);
554 extern int dev_restart(struct net_device *dev);
555 #ifdef CONFIG_NETPOLL_TRAP
556 extern int netpoll_trap(void);
559 typedef int gifconf_func_t(struct net_device * dev, char * bufptr, int len);
560 extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
561 static inline int unregister_gifconf(unsigned int family)
563 return register_gifconf(family, 0);
567 * Incoming packets are placed on per-cpu queues so that
568 * no locking is needed.
576 struct sk_buff_head input_pkt_queue;
577 struct list_head poll_list;
578 struct net_device *output_queue;
579 struct sk_buff *completion_queue;
581 struct net_device backlog_dev; /* Sorry. 8) */
584 DECLARE_PER_CPU(struct softnet_data,softnet_data);
586 #define HAVE_NETIF_QUEUE
588 static inline void __netif_schedule(struct net_device *dev)
590 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
592 struct softnet_data *sd;
594 local_irq_save(flags);
595 sd = &__get_cpu_var(softnet_data);
596 dev->next_sched = sd->output_queue;
597 sd->output_queue = dev;
598 raise_softirq_irqoff(NET_TX_SOFTIRQ);
599 local_irq_restore(flags);
603 static inline void netif_schedule(struct net_device *dev)
605 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
606 __netif_schedule(dev);
609 static inline void netif_start_queue(struct net_device *dev)
611 clear_bit(__LINK_STATE_XOFF, &dev->state);
614 static inline void netif_wake_queue(struct net_device *dev)
616 #ifdef CONFIG_NETPOLL_TRAP
620 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
621 __netif_schedule(dev);
624 static inline void netif_stop_queue(struct net_device *dev)
626 #ifdef CONFIG_NETPOLL_TRAP
630 set_bit(__LINK_STATE_XOFF, &dev->state);
633 static inline int netif_queue_stopped(const struct net_device *dev)
635 return test_bit(__LINK_STATE_XOFF, &dev->state);
638 static inline int netif_running(const struct net_device *dev)
640 return test_bit(__LINK_STATE_START, &dev->state);
644 /* Use this variant when it is known for sure that it
645 * is executing from interrupt context.
647 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
649 if (atomic_dec_and_test(&skb->users)) {
650 struct softnet_data *sd;
653 local_irq_save(flags);
654 sd = &__get_cpu_var(softnet_data);
655 skb->next = sd->completion_queue;
656 sd->completion_queue = skb;
657 raise_softirq_irqoff(NET_TX_SOFTIRQ);
658 local_irq_restore(flags);
662 /* Use this variant in places where it could be invoked
663 * either from interrupt or non-interrupt context.
665 static inline void dev_kfree_skb_any(struct sk_buff *skb)
667 if (in_irq() || irqs_disabled())
668 dev_kfree_skb_irq(skb);
673 #define HAVE_NETIF_RX 1
674 extern int netif_rx(struct sk_buff *skb);
675 #define HAVE_NETIF_RECEIVE_SKB 1
676 extern int netif_receive_skb(struct sk_buff *skb);
677 extern int dev_ioctl(unsigned int cmd, void *);
678 extern int dev_ethtool(struct ifreq *);
679 extern unsigned dev_get_flags(const struct net_device *);
680 extern int dev_change_flags(struct net_device *, unsigned);
681 extern int dev_set_mtu(struct net_device *, int);
682 extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
684 extern void dev_init(void);
686 extern int netdev_nit;
688 /* Post buffer to the network code from _non interrupt_ context.
689 * see net/core/dev.c for netif_rx description.
691 static inline int netif_rx_ni(struct sk_buff *skb)
693 int err = netif_rx(skb);
694 if (softirq_pending(smp_processor_id()))
699 /* Called by rtnetlink.c:rtnl_unlock() */
700 extern void netdev_run_todo(void);
702 static inline void dev_put(struct net_device *dev)
704 atomic_dec(&dev->refcnt);
707 #define __dev_put(dev) atomic_dec(&(dev)->refcnt)
708 #define dev_hold(dev) atomic_inc(&(dev)->refcnt)
710 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
711 * and _off may be called from IRQ context, but it is caller
712 * who is responsible for serialization of these calls.
715 extern void linkwatch_fire_event(struct net_device *dev);
717 static inline int netif_carrier_ok(const struct net_device *dev)
719 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
722 extern void __netdev_watchdog_up(struct net_device *dev);
724 static inline void netif_carrier_on(struct net_device *dev)
726 if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state))
727 linkwatch_fire_event(dev);
728 if (netif_running(dev))
729 __netdev_watchdog_up(dev);
732 static inline void netif_carrier_off(struct net_device *dev)
734 if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
735 linkwatch_fire_event(dev);
739 static inline int netif_device_present(struct net_device *dev)
741 return test_bit(__LINK_STATE_PRESENT, &dev->state);
744 static inline void netif_device_detach(struct net_device *dev)
746 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
747 netif_running(dev)) {
748 netif_stop_queue(dev);
752 static inline void netif_device_attach(struct net_device *dev)
754 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
755 netif_running(dev)) {
756 netif_wake_queue(dev);
757 __netdev_watchdog_up(dev);
762 * Network interface message level settings
764 #define HAVE_NETIF_MSG 1
767 NETIF_MSG_DRV = 0x0001,
768 NETIF_MSG_PROBE = 0x0002,
769 NETIF_MSG_LINK = 0x0004,
770 NETIF_MSG_TIMER = 0x0008,
771 NETIF_MSG_IFDOWN = 0x0010,
772 NETIF_MSG_IFUP = 0x0020,
773 NETIF_MSG_RX_ERR = 0x0040,
774 NETIF_MSG_TX_ERR = 0x0080,
775 NETIF_MSG_TX_QUEUED = 0x0100,
776 NETIF_MSG_INTR = 0x0200,
777 NETIF_MSG_TX_DONE = 0x0400,
778 NETIF_MSG_RX_STATUS = 0x0800,
779 NETIF_MSG_PKTDATA = 0x1000,
780 NETIF_MSG_HW = 0x2000,
781 NETIF_MSG_WOL = 0x4000,
784 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
785 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
786 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
787 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
788 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
789 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
790 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
791 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
792 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
793 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
794 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
795 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
796 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
797 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
798 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
800 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
803 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
804 return default_msg_enable_bits;
805 if (debug_value == 0) /* no output */
808 return (1 << debug_value) - 1;
811 /* Schedule rx intr now? */
813 static inline int netif_rx_schedule_prep(struct net_device *dev)
815 return netif_running(dev) &&
816 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
819 /* Add interface to tail of rx poll list. This assumes that _prep has
820 * already been called and returned 1.
823 static inline void __netif_rx_schedule(struct net_device *dev)
827 local_irq_save(flags);
829 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
831 dev->quota += dev->weight;
833 dev->quota = dev->weight;
834 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
835 local_irq_restore(flags);
838 /* Try to reschedule poll. Called by irq handler. */
840 static inline void netif_rx_schedule(struct net_device *dev)
842 if (netif_rx_schedule_prep(dev))
843 __netif_rx_schedule(dev);
846 /* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
847 * Do not inline this?
849 static inline int netif_rx_reschedule(struct net_device *dev, int undo)
851 if (netif_rx_schedule_prep(dev)) {
856 local_irq_save(flags);
857 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
858 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
859 local_irq_restore(flags);
865 /* Remove interface from poll list: it must be in the poll list
866 * on current cpu. This primitive is called by dev->poll(), when
867 * it completes the work. The device cannot be out of poll list at this
868 * moment, it is BUG().
870 static inline void netif_rx_complete(struct net_device *dev)
874 local_irq_save(flags);
875 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
876 list_del(&dev->poll_list);
877 smp_mb__before_clear_bit();
878 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
879 local_irq_restore(flags);
882 static inline void netif_poll_disable(struct net_device *dev)
884 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
886 current->state = TASK_INTERRUPTIBLE;
891 static inline void netif_poll_enable(struct net_device *dev)
893 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
896 /* same as netif_rx_complete, except that local_irq_save(flags)
897 * has already been issued
899 static inline void __netif_rx_complete(struct net_device *dev)
901 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
902 list_del(&dev->poll_list);
903 smp_mb__before_clear_bit();
904 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
907 static inline void netif_tx_disable(struct net_device *dev)
909 spin_lock_bh(&dev->xmit_lock);
910 netif_stop_queue(dev);
911 spin_unlock_bh(&dev->xmit_lock);
914 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
916 extern void ether_setup(struct net_device *dev);
917 extern void fddi_setup(struct net_device *dev);
918 extern void tr_setup(struct net_device *dev);
919 extern void fc_setup(struct net_device *dev);
920 extern void fc_freedev(struct net_device *dev);
921 /* Support for loadable net-drivers */
922 extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
923 void (*setup)(struct net_device *));
924 extern int register_netdev(struct net_device *dev);
925 extern void unregister_netdev(struct net_device *dev);
926 /* Functions used for multicast support */
927 extern void dev_mc_upload(struct net_device *dev);
928 extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
929 extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
930 extern void dev_mc_discard(struct net_device *dev);
931 extern void dev_set_promiscuity(struct net_device *dev, int inc);
932 extern void dev_set_allmulti(struct net_device *dev, int inc);
933 extern void netdev_state_change(struct net_device *dev);
934 /* Load a device via the kmod */
935 extern void dev_load(const char *name);
936 extern void dev_mcast_init(void);
937 extern int netdev_register_fc(struct net_device *dev, void (*stimul)(struct net_device *dev));
938 extern void netdev_unregister_fc(int bit);
939 extern int netdev_max_backlog;
941 extern unsigned long netdev_fc_xoff;
942 extern atomic_t netdev_dropping;
943 extern int netdev_set_master(struct net_device *dev, struct net_device *master);
944 extern struct sk_buff * skb_checksum_help(struct sk_buff *skb);
945 #ifdef CONFIG_NET_FASTROUTE
946 extern int netdev_fastroute;
947 extern int netdev_fastroute_obstacles;
948 extern void dev_clear_fastroute(struct net_device *dev);
952 extern char *net_sysctl_strdup(const char *s);
955 #endif /* __KERNEL__ */
957 #endif /* _LINUX_DEV_H */