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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};
235
236
237/*
238 * This structure holds at boot time configured netdevice settings. They
239 * are then used in the device probing.
240 */
241struct netdev_boot_setup {
242 char name[IFNAMSIZ];
243 struct ifmap map;
244};
245#define NETDEV_BOOT_SETUP_MAX 8
246
247extern int __init netdev_boot_setup(char *str);
248
249/*
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.
254 *
255 * FIXME: cleanup struct net_device such that network protocol info
256 * moves out.
257 */
258
259struct net_device
260{
261
262 /*
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
265 * the interface.
266 */
267 char name[IFNAMSIZ];
268 /* device name hash chain */
269 struct hlist_node name_hlist;
270
271 /*
272 * I/O specific fields
273 * FIXME: Merge these and struct ifmap into one
274 */
275 unsigned long mem_end; /* shared mem end */
276 unsigned long mem_start; /* shared mem start */
277 unsigned long base_addr; /* device I/O address */
278 unsigned int irq; /* device IRQ number */
279
280 /*
281 * Some hardware also needs these fields, but they are not
282 * part of the usual set specified in Space.c.
283 */
284
285 unsigned char if_port; /* Selectable AUI, TP,..*/
286 unsigned char dma; /* DMA channel */
287
288 unsigned long state;
289
290 struct net_device *next;
291
292 /* The device initialization function. Called only once. */
293 int (*init)(struct net_device *dev);
294
295 /* ------- Fields preinitialized in Space.c finish here ------- */
296
297 /* Net device features */
298 unsigned long features;
299#define NETIF_F_SG 1 /* Scatter/gather IO. */
300#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
301#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
302#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
303#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
304#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
305#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
306#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
307#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
308#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
309#define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
310#define NETIF_F_LLTX 4096 /* LockLess TX */
311
312 struct net_device *next_sched;
313
314 /* Interface index. Unique device identifier */
315 int ifindex;
316 int iflink;
317
318
319 struct net_device_stats* (*get_stats)(struct net_device *dev);
320 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
321
322 /* List of functions to handle Wireless Extensions (instead of ioctl).
323 * See <net/iw_handler.h> for details. Jean II */
324 const struct iw_handler_def * wireless_handlers;
325 /* Instance data managed by the core of Wireless Extensions. */
326 struct iw_public_data * wireless_data;
327
328 struct ethtool_ops *ethtool_ops;
329
330 /*
331 * This marks the end of the "visible" part of the structure. All
332 * fields hereafter are internal to the system, and may change at
333 * will (read: may be cleaned up at will).
334 */
335
336
337 unsigned short flags; /* interface flags (a la BSD) */
338 unsigned short gflags;
339 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
340 unsigned short padded; /* How much padding added by alloc_netdev() */
341
342 unsigned mtu; /* interface MTU value */
343 unsigned short type; /* interface hardware type */
344 unsigned short hard_header_len; /* hardware hdr length */
345
346 struct net_device *master; /* Pointer to master device of a group,
347 * which this device is member of.
348 */
349
350 /* Interface address info. */
351 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
352 unsigned char addr_len; /* hardware address length */
353 unsigned short dev_id; /* for shared network cards */
354
355 struct dev_mc_list *mc_list; /* Multicast mac addresses */
356 int mc_count; /* Number of installed mcasts */
357 int promiscuity;
358 int allmulti;
359
360
361 /* Protocol specific pointers */
362
363 void *atalk_ptr; /* AppleTalk link */
364 void *ip_ptr; /* IPv4 specific data */
365 void *dn_ptr; /* DECnet specific data */
366 void *ip6_ptr; /* IPv6 specific data */
367 void *ec_ptr; /* Econet specific data */
368 void *ax25_ptr; /* AX.25 specific data */
369
370/*
371 * Cache line mostly used on receive path (including eth_type_trans())
372 */
373 struct list_head poll_list ____cacheline_aligned_in_smp;
374 /* Link to poll list */
375
376 int (*poll) (struct net_device *dev, int *quota);
377 int quota;
378 int weight;
379 unsigned long last_rx; /* Time of last Rx */
380 /* Interface address info used in eth_type_trans() */
381 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
382 because most packets are unicast) */
383
384 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
385
386/*
387 * Cache line mostly used on queue transmit path (qdisc)
388 */
389 /* device queue lock */
390 spinlock_t queue_lock ____cacheline_aligned_in_smp;
391 struct Qdisc *qdisc;
392 struct Qdisc *qdisc_sleeping;
393 struct list_head qdisc_list;
394 unsigned long tx_queue_len; /* Max frames per queue allowed */
395
396 /* ingress path synchronizer */
397 spinlock_t ingress_lock;
398 struct Qdisc *qdisc_ingress;
399
400/*
401 * One part is mostly used on xmit path (device)
402 */
403 /* hard_start_xmit synchronizer */
404 spinlock_t xmit_lock ____cacheline_aligned_in_smp;
405 /* cpu id of processor entered to hard_start_xmit or -1,
406 if nobody entered there.
407 */
408 int xmit_lock_owner;
409 void *priv; /* pointer to private data */
410 int (*hard_start_xmit) (struct sk_buff *skb,
411 struct net_device *dev);
412 /* These may be needed for future network-power-down code. */
413 unsigned long trans_start; /* Time (in jiffies) of last Tx */
414
415 int watchdog_timeo; /* used by dev_watchdog() */
416 struct timer_list watchdog_timer;
417
418/*
419 * refcnt is a very hot point, so align it on SMP
420 */
421 /* Number of references to this device */
422 atomic_t refcnt ____cacheline_aligned_in_smp;
423
424 /* delayed register/unregister */
425 struct list_head todo_list;
426 /* device index hash chain */
427 struct hlist_node index_hlist;
428
429 /* register/unregister state machine */
430 enum { NETREG_UNINITIALIZED=0,
431 NETREG_REGISTERING, /* called register_netdevice */
432 NETREG_REGISTERED, /* completed register todo */
433 NETREG_UNREGISTERING, /* called unregister_netdevice */
434 NETREG_UNREGISTERED, /* completed unregister todo */
435 NETREG_RELEASED, /* called free_netdev */
436 } reg_state;
437
438 /* Called after device is detached from network. */
439 void (*uninit)(struct net_device *dev);
440 /* Called after last user reference disappears. */
441 void (*destructor)(struct net_device *dev);
442
443 /* Pointers to interface service routines. */
444 int (*open)(struct net_device *dev);
445 int (*stop)(struct net_device *dev);
446#define HAVE_NETDEV_POLL
447 int (*hard_header) (struct sk_buff *skb,
448 struct net_device *dev,
449 unsigned short type,
450 void *daddr,
451 void *saddr,
452 unsigned len);
453 int (*rebuild_header)(struct sk_buff *skb);
454#define HAVE_MULTICAST
455 void (*set_multicast_list)(struct net_device *dev);
456#define HAVE_SET_MAC_ADDR
457 int (*set_mac_address)(struct net_device *dev,
458 void *addr);
459#define HAVE_PRIVATE_IOCTL
460 int (*do_ioctl)(struct net_device *dev,
461 struct ifreq *ifr, int cmd);
462#define HAVE_SET_CONFIG
463 int (*set_config)(struct net_device *dev,
464 struct ifmap *map);
465#define HAVE_HEADER_CACHE
466 int (*hard_header_cache)(struct neighbour *neigh,
467 struct hh_cache *hh);
468 void (*header_cache_update)(struct hh_cache *hh,
469 struct net_device *dev,
470 unsigned char * haddr);
471#define HAVE_CHANGE_MTU
472 int (*change_mtu)(struct net_device *dev, int new_mtu);
473
474#define HAVE_TX_TIMEOUT
475 void (*tx_timeout) (struct net_device *dev);
476
477 void (*vlan_rx_register)(struct net_device *dev,
478 struct vlan_group *grp);
479 void (*vlan_rx_add_vid)(struct net_device *dev,
480 unsigned short vid);
481 void (*vlan_rx_kill_vid)(struct net_device *dev,
482 unsigned short vid);
483
484 int (*hard_header_parse)(struct sk_buff *skb,
485 unsigned char *haddr);
486 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
487#ifdef CONFIG_NETPOLL
488 struct netpoll_info *npinfo;
489#endif
490#ifdef CONFIG_NET_POLL_CONTROLLER
491 void (*poll_controller)(struct net_device *dev);
492#endif
493
494 /* bridge stuff */
495 struct net_bridge_port *br_port;
496
497#ifdef CONFIG_NET_DIVERT
498 /* this will get initialized at each interface type init routine */
499 struct divert_blk *divert;
500#endif /* CONFIG_NET_DIVERT */
501
502 /* class/net/name entry */
503 struct class_device class_dev;
504};
505
506#define NETDEV_ALIGN 32
507#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
508
509static inline void *netdev_priv(struct net_device *dev)
510{
511 return (char *)dev + ((sizeof(struct net_device)
512 + NETDEV_ALIGN_CONST)
513 & ~NETDEV_ALIGN_CONST);
514}
515
516#define SET_MODULE_OWNER(dev) do { } while (0)
517/* Set the sysfs physical device reference for the network logical device
518 * if set prior to registration will cause a symlink during initialization.
519 */
520#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
521
522struct packet_type {
523 __be16 type; /* This is really htons(ether_type). */
524 struct net_device *dev; /* NULL is wildcarded here */
525 int (*func) (struct sk_buff *,
526 struct net_device *,
527 struct packet_type *,
528 struct net_device *);
529 void *af_packet_priv;
530 struct list_head list;
531};
532
533#include <linux/interrupt.h>
534#include <linux/notifier.h>
535
536extern struct net_device loopback_dev; /* The loopback */
537extern struct net_device *dev_base; /* All devices */
538extern rwlock_t dev_base_lock; /* Device list lock */
539
540extern int netdev_boot_setup_check(struct net_device *dev);
541extern unsigned long netdev_boot_base(const char *prefix, int unit);
542extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
543extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
544extern void dev_add_pack(struct packet_type *pt);
545extern void dev_remove_pack(struct packet_type *pt);
546extern void __dev_remove_pack(struct packet_type *pt);
547
548extern struct net_device *dev_get_by_flags(unsigned short flags,
549 unsigned short mask);
550extern struct net_device *dev_get_by_name(const char *name);
551extern struct net_device *__dev_get_by_name(const char *name);
552extern int dev_alloc_name(struct net_device *dev, const char *name);
553extern int dev_open(struct net_device *dev);
554extern int dev_close(struct net_device *dev);
555extern int dev_queue_xmit(struct sk_buff *skb);
556extern int register_netdevice(struct net_device *dev);
557extern int unregister_netdevice(struct net_device *dev);
558extern void free_netdev(struct net_device *dev);
559extern void synchronize_net(void);
560extern int register_netdevice_notifier(struct notifier_block *nb);
561extern int unregister_netdevice_notifier(struct notifier_block *nb);
562extern int call_netdevice_notifiers(unsigned long val, void *v);
563extern struct net_device *dev_get_by_index(int ifindex);
564extern struct net_device *__dev_get_by_index(int ifindex);
565extern int dev_restart(struct net_device *dev);
566#ifdef CONFIG_NETPOLL_TRAP
567extern int netpoll_trap(void);
568#endif
569
570typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
571extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
572static inline int unregister_gifconf(unsigned int family)
573{
574 return register_gifconf(family, NULL);
575}
576
577/*
578 * Incoming packets are placed on per-cpu queues so that
579 * no locking is needed.
580 */
581
582struct softnet_data
583{
584 struct net_device *output_queue;
585 struct sk_buff_head input_pkt_queue;
586 struct list_head poll_list;
587 struct sk_buff *completion_queue;
588
589 struct net_device backlog_dev; /* Sorry. 8) */
590};
591
592DECLARE_PER_CPU(struct softnet_data,softnet_data);
593
594#define HAVE_NETIF_QUEUE
595
596static inline void __netif_schedule(struct net_device *dev)
597{
598 if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) {
599 unsigned long flags;
600 struct softnet_data *sd;
601
602 local_irq_save(flags);
603 sd = &__get_cpu_var(softnet_data);
604 dev->next_sched = sd->output_queue;
605 sd->output_queue = dev;
606 raise_softirq_irqoff(NET_TX_SOFTIRQ);
607 local_irq_restore(flags);
608 }
609}
610
611static inline void netif_schedule(struct net_device *dev)
612{
613 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
614 __netif_schedule(dev);
615}
616
617static inline void netif_start_queue(struct net_device *dev)
618{
619 clear_bit(__LINK_STATE_XOFF, &dev->state);
620}
621
622static inline void netif_wake_queue(struct net_device *dev)
623{
624#ifdef CONFIG_NETPOLL_TRAP
625 if (netpoll_trap())
626 return;
627#endif
628 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
629 __netif_schedule(dev);
630}
631
632static inline void netif_stop_queue(struct net_device *dev)
633{
634#ifdef CONFIG_NETPOLL_TRAP
635 if (netpoll_trap())
636 return;
637#endif
638 set_bit(__LINK_STATE_XOFF, &dev->state);
639}
640
641static inline int netif_queue_stopped(const struct net_device *dev)
642{
643 return test_bit(__LINK_STATE_XOFF, &dev->state);
644}
645
646static inline int netif_running(const struct net_device *dev)
647{
648 return test_bit(__LINK_STATE_START, &dev->state);
649}
650
651
652/* Use this variant when it is known for sure that it
653 * is executing from interrupt context.
654 */
655static inline void dev_kfree_skb_irq(struct sk_buff *skb)
656{
657 if (atomic_dec_and_test(&skb->users)) {
658 struct softnet_data *sd;
659 unsigned long flags;
660
661 local_irq_save(flags);
662 sd = &__get_cpu_var(softnet_data);
663 skb->next = sd->completion_queue;
664 sd->completion_queue = skb;
665 raise_softirq_irqoff(NET_TX_SOFTIRQ);
666 local_irq_restore(flags);
667 }
668}
669
670/* Use this variant in places where it could be invoked
671 * either from interrupt or non-interrupt context.
672 */
673static inline void dev_kfree_skb_any(struct sk_buff *skb)
674{
675 if (in_irq() || irqs_disabled())
676 dev_kfree_skb_irq(skb);
677 else
678 dev_kfree_skb(skb);
679}
680
681#define HAVE_NETIF_RX 1
682extern int netif_rx(struct sk_buff *skb);
683extern int netif_rx_ni(struct sk_buff *skb);
684#define HAVE_NETIF_RECEIVE_SKB 1
685extern int netif_receive_skb(struct sk_buff *skb);
686extern int dev_ioctl(unsigned int cmd, void __user *);
687extern int dev_ethtool(struct ifreq *);
688extern unsigned dev_get_flags(const struct net_device *);
689extern int dev_change_flags(struct net_device *, unsigned);
690extern int dev_change_name(struct net_device *, char *);
691extern int dev_set_mtu(struct net_device *, int);
692extern int dev_set_mac_address(struct net_device *,
693 struct sockaddr *);
694extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
695
696extern void dev_init(void);
697
698extern int netdev_nit;
699extern int netdev_budget;
700
701/* Called by rtnetlink.c:rtnl_unlock() */
702extern void netdev_run_todo(void);
703
704static inline void dev_put(struct net_device *dev)
705{
706 atomic_dec(&dev->refcnt);
707}
708
709#define __dev_put(dev) atomic_dec(&(dev)->refcnt)
710#define dev_hold(dev) atomic_inc(&(dev)->refcnt)
711
712/* Carrier loss detection, dial on demand. The functions netif_carrier_on
713 * and _off may be called from IRQ context, but it is caller
714 * who is responsible for serialization of these calls.
715 */
716
717extern void linkwatch_fire_event(struct net_device *dev);
718
719static inline int netif_carrier_ok(const struct net_device *dev)
720{
721 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
722}
723
724extern void __netdev_watchdog_up(struct net_device *dev);
725
726extern void netif_carrier_on(struct net_device *dev);
727
728extern void netif_carrier_off(struct net_device *dev);
729
730/* Hot-plugging. */
731static inline int netif_device_present(struct net_device *dev)
732{
733 return test_bit(__LINK_STATE_PRESENT, &dev->state);
734}
735
736static inline void netif_device_detach(struct net_device *dev)
737{
738 if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) &&
739 netif_running(dev)) {
740 netif_stop_queue(dev);
741 }
742}
743
744static inline void netif_device_attach(struct net_device *dev)
745{
746 if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) &&
747 netif_running(dev)) {
748 netif_wake_queue(dev);
749 __netdev_watchdog_up(dev);
750 }
751}
752
753/*
754 * Network interface message level settings
755 */
756#define HAVE_NETIF_MSG 1
757
758enum {
759 NETIF_MSG_DRV = 0x0001,
760 NETIF_MSG_PROBE = 0x0002,
761 NETIF_MSG_LINK = 0x0004,
762 NETIF_MSG_TIMER = 0x0008,
763 NETIF_MSG_IFDOWN = 0x0010,
764 NETIF_MSG_IFUP = 0x0020,
765 NETIF_MSG_RX_ERR = 0x0040,
766 NETIF_MSG_TX_ERR = 0x0080,
767 NETIF_MSG_TX_QUEUED = 0x0100,
768 NETIF_MSG_INTR = 0x0200,
769 NETIF_MSG_TX_DONE = 0x0400,
770 NETIF_MSG_RX_STATUS = 0x0800,
771 NETIF_MSG_PKTDATA = 0x1000,
772 NETIF_MSG_HW = 0x2000,
773 NETIF_MSG_WOL = 0x4000,
774};
775
776#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
777#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
778#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
779#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
780#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
781#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
782#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
783#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
784#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
785#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
786#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
787#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
788#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
789#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
790#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
791
792static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
793{
794 /* use default */
795 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
796 return default_msg_enable_bits;
797 if (debug_value == 0) /* no output */
798 return 0;
799 /* set low N bits */
800 return (1 << debug_value) - 1;
801}
802
803/* Schedule rx intr now? */
804
805static inline int netif_rx_schedule_prep(struct net_device *dev)
806{
807 return netif_running(dev) &&
808 !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
809}
810
811/* Add interface to tail of rx poll list. This assumes that _prep has
812 * already been called and returned 1.
813 */
814
815static inline void __netif_rx_schedule(struct net_device *dev)
816{
817 unsigned long flags;
818
819 local_irq_save(flags);
820 dev_hold(dev);
821 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
822 if (dev->quota < 0)
823 dev->quota += dev->weight;
824 else
825 dev->quota = dev->weight;
826 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
827 local_irq_restore(flags);
828}
829
830/* Try to reschedule poll. Called by irq handler. */
831
832static inline void netif_rx_schedule(struct net_device *dev)
833{
834 if (netif_rx_schedule_prep(dev))
835 __netif_rx_schedule(dev);
836}
837
838/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
839 * Do not inline this?
840 */
841static inline int netif_rx_reschedule(struct net_device *dev, int undo)
842{
843 if (netif_rx_schedule_prep(dev)) {
844 unsigned long flags;
845
846 dev->quota += undo;
847
848 local_irq_save(flags);
849 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
850 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
851 local_irq_restore(flags);
852 return 1;
853 }
854 return 0;
855}
856
857/* Remove interface from poll list: it must be in the poll list
858 * on current cpu. This primitive is called by dev->poll(), when
859 * it completes the work. The device cannot be out of poll list at this
860 * moment, it is BUG().
861 */
862static inline void netif_rx_complete(struct net_device *dev)
863{
864 unsigned long flags;
865
866 local_irq_save(flags);
867 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
868 list_del(&dev->poll_list);
869 smp_mb__before_clear_bit();
870 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
871 local_irq_restore(flags);
872}
873
874static inline void netif_poll_disable(struct net_device *dev)
875{
876 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
877 /* No hurry. */
878 current->state = TASK_INTERRUPTIBLE;
879 schedule_timeout(1);
880 }
881}
882
883static inline void netif_poll_enable(struct net_device *dev)
884{
885 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
886}
887
888/* same as netif_rx_complete, except that local_irq_save(flags)
889 * has already been issued
890 */
891static inline void __netif_rx_complete(struct net_device *dev)
892{
893 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
894 list_del(&dev->poll_list);
895 smp_mb__before_clear_bit();
896 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
897}
898
899static inline void netif_tx_disable(struct net_device *dev)
900{
901 spin_lock_bh(&dev->xmit_lock);
902 netif_stop_queue(dev);
903 spin_unlock_bh(&dev->xmit_lock);
904}
905
906/* These functions live elsewhere (drivers/net/net_init.c, but related) */
907
908extern void ether_setup(struct net_device *dev);
909
910/* Support for loadable net-drivers */
911extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
912 void (*setup)(struct net_device *));
913extern int register_netdev(struct net_device *dev);
914extern void unregister_netdev(struct net_device *dev);
915/* Functions used for multicast support */
916extern void dev_mc_upload(struct net_device *dev);
917extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
918extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
919extern void dev_mc_discard(struct net_device *dev);
920extern void dev_set_promiscuity(struct net_device *dev, int inc);
921extern void dev_set_allmulti(struct net_device *dev, int inc);
922extern void netdev_state_change(struct net_device *dev);
923extern void netdev_features_change(struct net_device *dev);
924/* Load a device via the kmod */
925extern void dev_load(const char *name);
926extern void dev_mcast_init(void);
927extern int netdev_max_backlog;
928extern int weight_p;
929extern int netdev_set_master(struct net_device *dev, struct net_device *master);
930extern int skb_checksum_help(struct sk_buff *skb, int inward);
931/* rx skb timestamps */
932extern void net_enable_timestamp(void);
933extern void net_disable_timestamp(void);
934
935#ifdef CONFIG_PROC_FS
936extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
937extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
938extern void dev_seq_stop(struct seq_file *seq, void *v);
939#endif
940
941extern void linkwatch_run_queue(void);
942
943#endif /* __KERNEL__ */
944
945#endif /* _LINUX_DEV_H */