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1/*
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.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
10 * Authors: Ross Biro
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>
17 *
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.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
28#include <linux/if.h>
29#include <linux/if_ether.h>
30#include <linux/if_packet.h>
31
32#ifdef __KERNEL__
33#include <asm/atomic.h>
34#include <asm/cache.h>
35#include <asm/byteorder.h>
36
37#include <linux/config.h>
38#include <linux/device.h>
39#include <linux/percpu.h>
40
41struct divert_blk;
42struct vlan_group;
43struct ethtool_ops;
44struct netpoll_info;
45 /* source back-compat hooks */
46#define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
48
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() */
53
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) */
61
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 */
69
70#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
71
72#endif
73
74#define MAX_ADDR_LEN 32 /* Largest hardware address length */
75
76/* Driver transmit return codes */
77#define NETDEV_TX_OK 0 /* driver took care of packet */
78#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
80
81/*
82 * Compute the worst case header length according to the protocols
83 * used.
84 */
85
86#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87#define LL_MAX_HEADER 32
88#else
89#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90#define LL_MAX_HEADER 96
91#else
92#define LL_MAX_HEADER 48
93#endif
94#endif
95
96#if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98#define MAX_HEADER LL_MAX_HEADER
99#else
100#define MAX_HEADER (LL_MAX_HEADER + 48)
101#endif
102
103/*
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
106 */
107
108struct net_device_stats
109{
110 unsigned long rx_packets; /* total packets received */
111 unsigned long tx_packets; /* total packets transmitted */
112 unsigned long rx_bytes; /* total bytes received */
113 unsigned long tx_bytes; /* total bytes transmitted */
114 unsigned long rx_errors; /* bad packets received */
115 unsigned long tx_errors; /* packet transmit problems */
116 unsigned long rx_dropped; /* no space in linux buffers */
117 unsigned long tx_dropped; /* no space available in linux */
118 unsigned long multicast; /* multicast packets received */
119 unsigned long collisions;
120
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors;
123 unsigned long rx_over_errors; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors; /* recved pkt with crc error */
125 unsigned long rx_frame_errors; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors; /* receiver missed packet */
128
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors;
131 unsigned long tx_carrier_errors;
132 unsigned long tx_fifo_errors;
133 unsigned long tx_heartbeat_errors;
134 unsigned long tx_window_errors;
135
136 /* for cslip etc */
137 unsigned long rx_compressed;
138 unsigned long tx_compressed;
139};
140
141
142/* Media selection options. */
143enum {
144 IF_PORT_UNKNOWN = 0,
145 IF_PORT_10BASE2,
146 IF_PORT_10BASET,
147 IF_PORT_AUI,
148 IF_PORT_100BASET,
149 IF_PORT_100BASETX,
150 IF_PORT_100BASEFX
151};
152
153#ifdef __KERNEL__
154
155#include <linux/cache.h>
156#include <linux/skbuff.h>
157
158struct neighbour;
159struct neigh_parms;
160struct sk_buff;
161
162struct netif_rx_stats
163{
164 unsigned total;
165 unsigned dropped;
166 unsigned time_squeeze;
167 unsigned cpu_collision;
168};
169
170DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
171
172
173/*
174 * We tag multicasts with these structures.
175 */
176
177struct dev_mc_list
178{
179 struct dev_mc_list *next;
180 __u8 dmi_addr[MAX_ADDR_LEN];
181 unsigned char dmi_addrlen;
182 int dmi_users;
183 int dmi_gusers;
184};
185
186struct hh_cache
187{
188 struct hh_cache *hh_next; /* Next entry */
189 atomic_t hh_refcnt; /* number of users */
190 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
193 */
194 int hh_len; /* length of header */
195 int (*hh_output)(struct sk_buff *skb);
196 rwlock_t hh_lock;
197
198 /* cached hardware header; allow for machine alignment needs. */
199#define HH_DATA_MOD 16
200#define HH_DATA_OFF(__len) \
201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
202#define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
205};
206
207/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
208 * Alternative is:
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
211 *
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
214 */
215#define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
219
220/* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
222 * code.
223 */
224
225enum netdev_state_t
226{
227 __LINK_STATE_XOFF=0,
228 __LINK_STATE_START,
229 __LINK_STATE_PRESENT,
230 __LINK_STATE_SCHED,
231 __LINK_STATE_NOCARRIER,
232 __LINK_STATE_RX_SCHED,
233 __LINK_STATE_LINKWATCH_PENDING,
234 __LINK_STATE_DORMANT,
235};
236
237
238/*
239 * This structure holds at boot time configured netdevice settings. They
240 * are then used in the device probing.
241 */
242struct netdev_boot_setup {
243 char name[IFNAMSIZ];
244 struct ifmap map;
245};
246#define NETDEV_BOOT_SETUP_MAX 8
247
248extern int __init netdev_boot_setup(char *str);
249
250/*
251 * The DEVICE structure.
252 * Actually, this whole structure is a big mistake. It mixes I/O
253 * data with strictly "high-level" data, and it has to know about
254 * almost every data structure used in the INET module.
255 *
256 * FIXME: cleanup struct net_device such that network protocol info
257 * moves out.
258 */
259
260struct net_device
261{
262
263 /*
264 * This is the first field of the "visible" part of this structure
265 * (i.e. as seen by users in the "Space.c" file). It is the name
266 * the interface.
267 */
268 char name[IFNAMSIZ];
269 /* device name hash chain */
270 struct hlist_node name_hlist;
271
272 /*
273 * I/O specific fields
274 * FIXME: Merge these and struct ifmap into one
275 */
276 unsigned long mem_end; /* shared mem end */
277 unsigned long mem_start; /* shared mem start */
278 unsigned long base_addr; /* device I/O address */
279 unsigned int irq; /* device IRQ number */
280
281 /*
282 * Some hardware also needs these fields, but they are not
283 * part of the usual set specified in Space.c.
284 */
285
286 unsigned char if_port; /* Selectable AUI, TP,..*/
287 unsigned char dma; /* DMA channel */
288
289 unsigned long state;
290
291 struct net_device *next;
292
293 /* The device initialization function. Called only once. */
294 int (*init)(struct net_device *dev);
295
296 /* ------- Fields preinitialized in Space.c finish here ------- */
297
298 /* Net device features */
299 unsigned long features;
300#define NETIF_F_SG 1 /* Scatter/gather IO. */
301#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
302#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
303#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
304#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
305#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
306#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
307#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
308#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
309#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
310#define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
311#define NETIF_F_LLTX 4096 /* LockLess TX */
312#define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
313
314 struct net_device *next_sched;
315
316 /* Interface index. Unique device identifier */
317 int ifindex;
318 int iflink;
319
320
321 struct net_device_stats* (*get_stats)(struct net_device *dev);
322 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
323
324 /* List of functions to handle Wireless Extensions (instead of ioctl).
325 * See <net/iw_handler.h> for details. Jean II */
326 const struct iw_handler_def * wireless_handlers;
327 /* Instance data managed by the core of Wireless Extensions. */
328 struct iw_public_data * wireless_data;
329
330 struct ethtool_ops *ethtool_ops;
331
332 /*
333 * This marks the end of the "visible" part of the structure. All
334 * fields hereafter are internal to the system, and may change at
335 * will (read: may be cleaned up at will).
336 */
337
338
339 unsigned int flags; /* interface flags (a la BSD) */
340 unsigned short gflags;
341 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
342 unsigned short padded; /* How much padding added by alloc_netdev() */
343
344 unsigned char operstate; /* RFC2863 operstate */
345 unsigned char link_mode; /* mapping policy to operstate */
346
347 unsigned mtu; /* interface MTU value */
348 unsigned short type; /* interface hardware type */
349 unsigned short hard_header_len; /* hardware hdr length */
350
351 struct net_device *master; /* Pointer to master device of a group,
352 * which this device is member of.
353 */
354
355 /* Interface address info. */
356 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
357 unsigned char addr_len; /* hardware address length */
358 unsigned short dev_id; /* for shared network cards */
359
360 struct dev_mc_list *mc_list; /* Multicast mac addresses */
361 int mc_count; /* Number of installed mcasts */
362 int promiscuity;
363 int allmulti;
364
365
366 /* Protocol specific pointers */
367
368 void *atalk_ptr; /* AppleTalk link */
369 void *ip_ptr; /* IPv4 specific data */
370 void *dn_ptr; /* DECnet specific data */
371 void *ip6_ptr; /* IPv6 specific data */
372 void *ec_ptr; /* Econet specific data */
373 void *ax25_ptr; /* AX.25 specific data */
374
375/*
376 * Cache line mostly used on receive path (including eth_type_trans())
377 */
378 struct list_head poll_list ____cacheline_aligned_in_smp;
379 /* Link to poll list */
380
381 int (*poll) (struct net_device *dev, int *quota);
382 int quota;
383 int weight;
384 unsigned long last_rx; /* Time of last Rx */
385 /* Interface address info used in eth_type_trans() */
386 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
387 because most packets are unicast) */
388
389 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
390
391/*
392 * Cache line mostly used on queue transmit path (qdisc)
393 */
394 /* device queue lock */
395 spinlock_t queue_lock ____cacheline_aligned_in_smp;
396 struct Qdisc *qdisc;
397 struct Qdisc *qdisc_sleeping;
398 struct list_head qdisc_list;
399 unsigned long tx_queue_len; /* Max frames per queue allowed */
400
401 /* ingress path synchronizer */
402 spinlock_t ingress_lock;
403 struct Qdisc *qdisc_ingress;
404
405/*
406 * One part is mostly used on xmit path (device)
407 */
408 /* hard_start_xmit synchronizer */
409 spinlock_t xmit_lock ____cacheline_aligned_in_smp;
410 /* cpu id of processor entered to hard_start_xmit or -1,
411 if nobody entered there.
412 */
413 int xmit_lock_owner;
414 void *priv; /* pointer to private data */
415 int (*hard_start_xmit) (struct sk_buff *skb,
416 struct net_device *dev);
417 /* These may be needed for future network-power-down code. */
418 unsigned long trans_start; /* Time (in jiffies) of last Tx */
419
420 int watchdog_timeo; /* used by dev_watchdog() */
421 struct timer_list watchdog_timer;
422
423/*
424 * refcnt is a very hot point, so align it on SMP
425 */
426 /* Number of references to this device */
427 atomic_t refcnt ____cacheline_aligned_in_smp;
428
429 /* delayed register/unregister */
430 struct list_head todo_list;
431 /* device index hash chain */
432 struct hlist_node index_hlist;
433
434 /* register/unregister state machine */
435 enum { NETREG_UNINITIALIZED=0,
436 NETREG_REGISTERING, /* called register_netdevice */
437 NETREG_REGISTERED, /* completed register todo */
438 NETREG_UNREGISTERING, /* called unregister_netdevice */
439 NETREG_UNREGISTERED, /* completed unregister todo */
440 NETREG_RELEASED, /* called free_netdev */
441 } reg_state;
442
443 /* Called after device is detached from network. */
444 void (*uninit)(struct net_device *dev);
445 /* Called after last user reference disappears. */
446 void (*destructor)(struct net_device *dev);
447
448 /* Pointers to interface service routines. */
449 int (*open)(struct net_device *dev);
450 int (*stop)(struct net_device *dev);
451#define HAVE_NETDEV_POLL
452 int (*hard_header) (struct sk_buff *skb,
453 struct net_device *dev,
454 unsigned short type,
455 void *daddr,
456 void *saddr,
457 unsigned len);
458 int (*rebuild_header)(struct sk_buff *skb);
459#define HAVE_MULTICAST
460 void (*set_multicast_list)(struct net_device *dev);
461#define HAVE_SET_MAC_ADDR
462 int (*set_mac_address)(struct net_device *dev,
463 void *addr);
464#define HAVE_PRIVATE_IOCTL
465 int (*do_ioctl)(struct net_device *dev,
466 struct ifreq *ifr, int cmd);
467#define HAVE_SET_CONFIG
468 int (*set_config)(struct net_device *dev,
469 struct ifmap *map);
470#define HAVE_HEADER_CACHE
471 int (*hard_header_cache)(struct neighbour *neigh,
472 struct hh_cache *hh);
473 void (*header_cache_update)(struct hh_cache *hh,
474 struct net_device *dev,
475 unsigned char * haddr);
476#define HAVE_CHANGE_MTU
477 int (*change_mtu)(struct net_device *dev, int new_mtu);
478
479#define HAVE_TX_TIMEOUT
480 void (*tx_timeout) (struct net_device *dev);
481
482 void (*vlan_rx_register)(struct net_device *dev,
483 struct vlan_group *grp);
484 void (*vlan_rx_add_vid)(struct net_device *dev,
485 unsigned short vid);
486 void (*vlan_rx_kill_vid)(struct net_device *dev,
487 unsigned short vid);
488
489 int (*hard_header_parse)(struct sk_buff *skb,
490 unsigned char *haddr);
491 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
492#ifdef CONFIG_NETPOLL
493 struct netpoll_info *npinfo;
494#endif
495#ifdef CONFIG_NET_POLL_CONTROLLER
496 void (*poll_controller)(struct net_device *dev);
497#endif
498
499 /* bridge stuff */
500 struct net_bridge_port *br_port;
501
502#ifdef CONFIG_NET_DIVERT
503 /* this will get initialized at each interface type init routine */
504 struct divert_blk *divert;
505#endif /* CONFIG_NET_DIVERT */
506
507 /* class/net/name entry */
508 struct class_device class_dev;
509};
510
511#define NETDEV_ALIGN 32
512#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
513
514static inline void *netdev_priv(struct net_device *dev)
515{
516 return (char *)dev + ((sizeof(struct net_device)
517 + NETDEV_ALIGN_CONST)
518 & ~NETDEV_ALIGN_CONST);
519}
520
521#define SET_MODULE_OWNER(dev) do { } while (0)
522/* Set the sysfs physical device reference for the network logical device
523 * if set prior to registration will cause a symlink during initialization.
524 */
525#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
526
527struct packet_type {
528 __be16 type; /* This is really htons(ether_type). */
529 struct net_device *dev; /* NULL is wildcarded here */
530 int (*func) (struct sk_buff *,
531 struct net_device *,
532 struct packet_type *,
533 struct net_device *);
534 void *af_packet_priv;
535 struct list_head list;
536};
537
538#include <linux/interrupt.h>
539#include <linux/notifier.h>
540
541extern struct net_device loopback_dev; /* The loopback */
542extern struct net_device *dev_base; /* All devices */
543extern rwlock_t dev_base_lock; /* Device list lock */
544
545extern int netdev_boot_setup_check(struct net_device *dev);
546extern unsigned long netdev_boot_base(const char *prefix, int unit);
547extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
548extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
549extern void dev_add_pack(struct packet_type *pt);
550extern void dev_remove_pack(struct packet_type *pt);
551extern void __dev_remove_pack(struct packet_type *pt);
552
553extern struct net_device *dev_get_by_flags(unsigned short flags,
554 unsigned short mask);
555extern struct net_device *dev_get_by_name(const char *name);
556extern struct net_device *__dev_get_by_name(const char *name);
557extern int dev_alloc_name(struct net_device *dev, const char *name);
558extern int dev_open(struct net_device *dev);
559extern int dev_close(struct net_device *dev);
560extern int dev_queue_xmit(struct sk_buff *skb);
561extern int register_netdevice(struct net_device *dev);
562extern int unregister_netdevice(struct net_device *dev);
563extern void free_netdev(struct net_device *dev);
564extern void synchronize_net(void);
565extern int register_netdevice_notifier(struct notifier_block *nb);
566extern int unregister_netdevice_notifier(struct notifier_block *nb);
567extern int call_netdevice_notifiers(unsigned long val, void *v);
568extern struct net_device *dev_get_by_index(int ifindex);
569extern struct net_device *__dev_get_by_index(int ifindex);
570extern int dev_restart(struct net_device *dev);
571#ifdef CONFIG_NETPOLL_TRAP
572extern int netpoll_trap(void);
573#endif
574
575typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
576extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
577static inline int unregister_gifconf(unsigned int family)
578{
579 return register_gifconf(family, NULL);
580}
581
582/*
583 * Incoming packets are placed on per-cpu queues so that
584 * no locking is needed.
585 */
586
587struct softnet_data
588{
589 struct net_device *output_queue;
590 struct sk_buff_head input_pkt_queue;
591 struct list_head poll_list;
592 struct sk_buff *completion_queue;
593
594 struct net_device backlog_dev; /* Sorry. 8) */
595};
596
597DECLARE_PER_CPU(struct softnet_data,softnet_data);
598
599#define HAVE_NETIF_QUEUE
600
601extern void __netif_schedule(struct net_device *dev);
602
603static inline void netif_schedule(struct net_device *dev)
604{
605 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
606 __netif_schedule(dev);
607}
608
609static inline void netif_start_queue(struct net_device *dev)
610{
611 clear_bit(__LINK_STATE_XOFF, &dev->state);
612}
613
614static inline void netif_wake_queue(struct net_device *dev)
615{
616#ifdef CONFIG_NETPOLL_TRAP
617 if (netpoll_trap())
618 return;
619#endif
620 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
621 __netif_schedule(dev);
622}
623
624static inline void netif_stop_queue(struct net_device *dev)
625{
626#ifdef CONFIG_NETPOLL_TRAP
627 if (netpoll_trap())
628 return;
629#endif
630 set_bit(__LINK_STATE_XOFF, &dev->state);
631}
632
633static inline int netif_queue_stopped(const struct net_device *dev)
634{
635 return test_bit(__LINK_STATE_XOFF, &dev->state);
636}
637
638static inline int netif_running(const struct net_device *dev)
639{
640 return test_bit(__LINK_STATE_START, &dev->state);
641}
642
643
644/* Use this variant when it is known for sure that it
645 * is executing from interrupt context.
646 */
647static inline void dev_kfree_skb_irq(struct sk_buff *skb)
648{
649 if (atomic_dec_and_test(&skb->users)) {
650 struct softnet_data *sd;
651 unsigned long flags;
652
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);
659 }
660}
661
662/* Use this variant in places where it could be invoked
663 * either from interrupt or non-interrupt context.
664 */
665extern void dev_kfree_skb_any(struct sk_buff *skb);
666
667#define HAVE_NETIF_RX 1
668extern int netif_rx(struct sk_buff *skb);
669extern int netif_rx_ni(struct sk_buff *skb);
670#define HAVE_NETIF_RECEIVE_SKB 1
671extern int netif_receive_skb(struct sk_buff *skb);
672extern int dev_valid_name(const char *name);
673extern int dev_ioctl(unsigned int cmd, void __user *);
674extern int dev_ethtool(struct ifreq *);
675extern unsigned dev_get_flags(const struct net_device *);
676extern int dev_change_flags(struct net_device *, unsigned);
677extern int dev_change_name(struct net_device *, char *);
678extern int dev_set_mtu(struct net_device *, int);
679extern int dev_set_mac_address(struct net_device *,
680 struct sockaddr *);
681extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
682
683extern void dev_init(void);
684
685extern int netdev_nit;
686extern int netdev_budget;
687
688/* Called by rtnetlink.c:rtnl_unlock() */
689extern void netdev_run_todo(void);
690
691static inline void dev_put(struct net_device *dev)
692{
693 atomic_dec(&dev->refcnt);
694}
695
696static inline void dev_hold(struct net_device *dev)
697{
698 atomic_inc(&dev->refcnt);
699}
700
701/* Carrier loss detection, dial on demand. The functions netif_carrier_on
702 * and _off may be called from IRQ context, but it is caller
703 * who is responsible for serialization of these calls.
704 *
705 * The name carrier is inappropriate, these functions should really be
706 * called netif_lowerlayer_*() because they represent the state of any
707 * kind of lower layer not just hardware media.
708 */
709
710extern void linkwatch_fire_event(struct net_device *dev);
711
712static inline int netif_carrier_ok(const struct net_device *dev)
713{
714 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
715}
716
717extern void __netdev_watchdog_up(struct net_device *dev);
718
719extern void netif_carrier_on(struct net_device *dev);
720
721extern void netif_carrier_off(struct net_device *dev);
722
723static inline void netif_dormant_on(struct net_device *dev)
724{
725 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
726 linkwatch_fire_event(dev);
727}
728
729static inline void netif_dormant_off(struct net_device *dev)
730{
731 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
732 linkwatch_fire_event(dev);
733}
734
735static inline int netif_dormant(const struct net_device *dev)
736{
737 return test_bit(__LINK_STATE_DORMANT, &dev->state);
738}
739
740
741static inline int netif_oper_up(const struct net_device *dev) {
742 return (dev->operstate == IF_OPER_UP ||
743 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
744}
745
746/* Hot-plugging. */
747static inline int netif_device_present(struct net_device *dev)
748{
749 return test_bit(__LINK_STATE_PRESENT, &dev->state);
750}
751
752extern void netif_device_detach(struct net_device *dev);
753
754extern void netif_device_attach(struct net_device *dev);
755
756/*
757 * Network interface message level settings
758 */
759#define HAVE_NETIF_MSG 1
760
761enum {
762 NETIF_MSG_DRV = 0x0001,
763 NETIF_MSG_PROBE = 0x0002,
764 NETIF_MSG_LINK = 0x0004,
765 NETIF_MSG_TIMER = 0x0008,
766 NETIF_MSG_IFDOWN = 0x0010,
767 NETIF_MSG_IFUP = 0x0020,
768 NETIF_MSG_RX_ERR = 0x0040,
769 NETIF_MSG_TX_ERR = 0x0080,
770 NETIF_MSG_TX_QUEUED = 0x0100,
771 NETIF_MSG_INTR = 0x0200,
772 NETIF_MSG_TX_DONE = 0x0400,
773 NETIF_MSG_RX_STATUS = 0x0800,
774 NETIF_MSG_PKTDATA = 0x1000,
775 NETIF_MSG_HW = 0x2000,
776 NETIF_MSG_WOL = 0x4000,
777};
778
779#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
780#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
781#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
782#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
783#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
784#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
785#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
786#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
787#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
788#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
789#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
790#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
791#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
792#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
793#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
794
795static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
796{
797 /* use default */
798 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
799 return default_msg_enable_bits;
800 if (debug_value == 0) /* no output */
801 return 0;
802 /* set low N bits */
803 return (1 << debug_value) - 1;
804}
805
806/* Test if receive needs to be scheduled */
807static inline int __netif_rx_schedule_prep(struct net_device *dev)
808{
809 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
810}
811
812/* Test if receive needs to be scheduled but only if up */
813static inline int netif_rx_schedule_prep(struct net_device *dev)
814{
815 return netif_running(dev) && __netif_rx_schedule_prep(dev);
816}
817
818/* Add interface to tail of rx poll list. This assumes that _prep has
819 * already been called and returned 1.
820 */
821
822extern void __netif_rx_schedule(struct net_device *dev);
823
824/* Try to reschedule poll. Called by irq handler. */
825
826static inline void netif_rx_schedule(struct net_device *dev)
827{
828 if (netif_rx_schedule_prep(dev))
829 __netif_rx_schedule(dev);
830}
831
832/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
833 * Do not inline this?
834 */
835static inline int netif_rx_reschedule(struct net_device *dev, int undo)
836{
837 if (netif_rx_schedule_prep(dev)) {
838 unsigned long flags;
839
840 dev->quota += undo;
841
842 local_irq_save(flags);
843 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
844 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
845 local_irq_restore(flags);
846 return 1;
847 }
848 return 0;
849}
850
851/* Remove interface from poll list: it must be in the poll list
852 * on current cpu. This primitive is called by dev->poll(), when
853 * it completes the work. The device cannot be out of poll list at this
854 * moment, it is BUG().
855 */
856static inline void netif_rx_complete(struct net_device *dev)
857{
858 unsigned long flags;
859
860 local_irq_save(flags);
861 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
862 list_del(&dev->poll_list);
863 smp_mb__before_clear_bit();
864 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
865 local_irq_restore(flags);
866}
867
868static inline void netif_poll_disable(struct net_device *dev)
869{
870 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
871 /* No hurry. */
872 schedule_timeout_interruptible(1);
873}
874
875static inline void netif_poll_enable(struct net_device *dev)
876{
877 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
878}
879
880/* same as netif_rx_complete, except that local_irq_save(flags)
881 * has already been issued
882 */
883static inline void __netif_rx_complete(struct net_device *dev)
884{
885 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
886 list_del(&dev->poll_list);
887 smp_mb__before_clear_bit();
888 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
889}
890
891static inline void netif_tx_disable(struct net_device *dev)
892{
893 spin_lock_bh(&dev->xmit_lock);
894 netif_stop_queue(dev);
895 spin_unlock_bh(&dev->xmit_lock);
896}
897
898/* These functions live elsewhere (drivers/net/net_init.c, but related) */
899
900extern void ether_setup(struct net_device *dev);
901
902/* Support for loadable net-drivers */
903extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
904 void (*setup)(struct net_device *));
905extern int register_netdev(struct net_device *dev);
906extern void unregister_netdev(struct net_device *dev);
907/* Functions used for multicast support */
908extern void dev_mc_upload(struct net_device *dev);
909extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
910extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
911extern void dev_mc_discard(struct net_device *dev);
912extern void dev_set_promiscuity(struct net_device *dev, int inc);
913extern void dev_set_allmulti(struct net_device *dev, int inc);
914extern void netdev_state_change(struct net_device *dev);
915extern void netdev_features_change(struct net_device *dev);
916/* Load a device via the kmod */
917extern void dev_load(const char *name);
918extern void dev_mcast_init(void);
919extern int netdev_max_backlog;
920extern int weight_p;
921extern int netdev_set_master(struct net_device *dev, struct net_device *master);
922extern int skb_checksum_help(struct sk_buff *skb, int inward);
923#ifdef CONFIG_BUG
924extern void netdev_rx_csum_fault(struct net_device *dev);
925#else
926static inline void netdev_rx_csum_fault(struct net_device *dev)
927{
928}
929#endif
930/* rx skb timestamps */
931extern void net_enable_timestamp(void);
932extern void net_disable_timestamp(void);
933
934#ifdef CONFIG_PROC_FS
935extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
936extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
937extern void dev_seq_stop(struct seq_file *seq, void *v);
938#endif
939
940extern void linkwatch_run_queue(void);
941
942#endif /* __KERNEL__ */
943
944#endif /* _LINUX_DEV_H */