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1da177e4
LT
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 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT
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
1da177e4
LT
37#include <linux/device.h>
38#include <linux/percpu.h>
db217334 39#include <linux/dmaengine.h>
1da177e4
LT
40
41struct divert_blk;
42struct vlan_group;
43struct ethtool_ops;
115c1d6e 44struct netpoll_info;
1da177e4
LT
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;
1da177e4
LT
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) \
5ba0eac6 201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT
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,
b00055aa
SR
233 __LINK_STATE_LINKWATCH_PENDING,
234 __LINK_STATE_DORMANT,
48d83325 235 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT
236};
237
238
239/*
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
242 */
243struct netdev_boot_setup {
244 char name[IFNAMSIZ];
245 struct ifmap map;
246};
247#define NETDEV_BOOT_SETUP_MAX 8
248
20380731 249extern int __init netdev_boot_setup(char *str);
1da177e4
LT
250
251/*
252 * The DEVICE structure.
253 * Actually, this whole structure is a big mistake. It mixes I/O
254 * data with strictly "high-level" data, and it has to know about
255 * almost every data structure used in the INET module.
256 *
257 * FIXME: cleanup struct net_device such that network protocol info
258 * moves out.
259 */
260
261struct net_device
262{
263
264 /*
265 * This is the first field of the "visible" part of this structure
266 * (i.e. as seen by users in the "Space.c" file). It is the name
267 * the interface.
268 */
269 char name[IFNAMSIZ];
9356b8fc
ED
270 /* device name hash chain */
271 struct hlist_node name_hlist;
1da177e4
LT
272
273 /*
274 * I/O specific fields
275 * FIXME: Merge these and struct ifmap into one
276 */
277 unsigned long mem_end; /* shared mem end */
278 unsigned long mem_start; /* shared mem start */
279 unsigned long base_addr; /* device I/O address */
280 unsigned int irq; /* device IRQ number */
281
282 /*
283 * Some hardware also needs these fields, but they are not
284 * part of the usual set specified in Space.c.
285 */
286
287 unsigned char if_port; /* Selectable AUI, TP,..*/
288 unsigned char dma; /* DMA channel */
289
290 unsigned long state;
291
292 struct net_device *next;
293
294 /* The device initialization function. Called only once. */
295 int (*init)(struct net_device *dev);
296
297 /* ------- Fields preinitialized in Space.c finish here ------- */
298
9356b8fc
ED
299 /* Net device features */
300 unsigned long features;
301#define NETIF_F_SG 1 /* Scatter/gather IO. */
302#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
303#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
304#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
305#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
306#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
307#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
308#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
309#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
310#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
311#define NETIF_F_TSO 2048 /* Can offload TCP/IP segmentation */
312#define NETIF_F_LLTX 4096 /* LockLess TX */
e89e9cf5 313#define NETIF_F_UFO 8192 /* Can offload UDP Large Send*/
9356b8fc 314
8648b305
HX
315#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
316#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
317
1da177e4
LT
318 struct net_device *next_sched;
319
320 /* Interface index. Unique device identifier */
321 int ifindex;
322 int iflink;
323
324
325 struct net_device_stats* (*get_stats)(struct net_device *dev);
326 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
327
328 /* List of functions to handle Wireless Extensions (instead of ioctl).
329 * See <net/iw_handler.h> for details. Jean II */
330 const struct iw_handler_def * wireless_handlers;
331 /* Instance data managed by the core of Wireless Extensions. */
332 struct iw_public_data * wireless_data;
333
334 struct ethtool_ops *ethtool_ops;
335
336 /*
337 * This marks the end of the "visible" part of the structure. All
338 * fields hereafter are internal to the system, and may change at
339 * will (read: may be cleaned up at will).
340 */
341
1da177e4 342
b00055aa 343 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT
344 unsigned short gflags;
345 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
346 unsigned short padded; /* How much padding added by alloc_netdev() */
347
b00055aa
SR
348 unsigned char operstate; /* RFC2863 operstate */
349 unsigned char link_mode; /* mapping policy to operstate */
350
1da177e4
LT
351 unsigned mtu; /* interface MTU value */
352 unsigned short type; /* interface hardware type */
353 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT
354
355 struct net_device *master; /* Pointer to master device of a group,
356 * which this device is member of.
357 */
358
359 /* Interface address info. */
a6f9a705 360 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT
361 unsigned char addr_len; /* hardware address length */
362 unsigned short dev_id; /* for shared network cards */
363
364 struct dev_mc_list *mc_list; /* Multicast mac addresses */
365 int mc_count; /* Number of installed mcasts */
366 int promiscuity;
367 int allmulti;
368
1da177e4
LT
369
370 /* Protocol specific pointers */
371
372 void *atalk_ptr; /* AppleTalk link */
373 void *ip_ptr; /* IPv4 specific data */
374 void *dn_ptr; /* DECnet specific data */
375 void *ip6_ptr; /* IPv6 specific data */
376 void *ec_ptr; /* Econet specific data */
377 void *ax25_ptr; /* AX.25 specific data */
378
9356b8fc
ED
379/*
380 * Cache line mostly used on receive path (including eth_type_trans())
381 */
382 struct list_head poll_list ____cacheline_aligned_in_smp;
383 /* Link to poll list */
384
385 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT
386 int quota;
387 int weight;
9356b8fc
ED
388 unsigned long last_rx; /* Time of last Rx */
389 /* Interface address info used in eth_type_trans() */
390 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
391 because most packets are unicast) */
392
393 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 394
9356b8fc
ED
395/*
396 * Cache line mostly used on queue transmit path (qdisc)
397 */
398 /* device queue lock */
399 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT
400 struct Qdisc *qdisc;
401 struct Qdisc *qdisc_sleeping;
1da177e4
LT
402 struct list_head qdisc_list;
403 unsigned long tx_queue_len; /* Max frames per queue allowed */
404
405 /* ingress path synchronizer */
406 spinlock_t ingress_lock;
9356b8fc
ED
407 struct Qdisc *qdisc_ingress;
408
409/*
410 * One part is mostly used on xmit path (device)
411 */
1da177e4 412 /* hard_start_xmit synchronizer */
932ff279 413 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT
414 /* cpu id of processor entered to hard_start_xmit or -1,
415 if nobody entered there.
416 */
417 int xmit_lock_owner;
9356b8fc
ED
418 void *priv; /* pointer to private data */
419 int (*hard_start_xmit) (struct sk_buff *skb,
420 struct net_device *dev);
421 /* These may be needed for future network-power-down code. */
422 unsigned long trans_start; /* Time (in jiffies) of last Tx */
423
424 int watchdog_timeo; /* used by dev_watchdog() */
425 struct timer_list watchdog_timer;
426
427/*
428 * refcnt is a very hot point, so align it on SMP
429 */
1da177e4 430 /* Number of references to this device */
9356b8fc
ED
431 atomic_t refcnt ____cacheline_aligned_in_smp;
432
1da177e4
LT
433 /* delayed register/unregister */
434 struct list_head todo_list;
1da177e4
LT
435 /* device index hash chain */
436 struct hlist_node index_hlist;
437
438 /* register/unregister state machine */
439 enum { NETREG_UNINITIALIZED=0,
b17a7c17 440 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT
441 NETREG_UNREGISTERING, /* called unregister_netdevice */
442 NETREG_UNREGISTERED, /* completed unregister todo */
443 NETREG_RELEASED, /* called free_netdev */
444 } reg_state;
445
1da177e4
LT
446 /* Called after device is detached from network. */
447 void (*uninit)(struct net_device *dev);
448 /* Called after last user reference disappears. */
449 void (*destructor)(struct net_device *dev);
450
451 /* Pointers to interface service routines. */
452 int (*open)(struct net_device *dev);
453 int (*stop)(struct net_device *dev);
1da177e4 454#define HAVE_NETDEV_POLL
1da177e4
LT
455 int (*hard_header) (struct sk_buff *skb,
456 struct net_device *dev,
457 unsigned short type,
458 void *daddr,
459 void *saddr,
460 unsigned len);
461 int (*rebuild_header)(struct sk_buff *skb);
462#define HAVE_MULTICAST
463 void (*set_multicast_list)(struct net_device *dev);
464#define HAVE_SET_MAC_ADDR
465 int (*set_mac_address)(struct net_device *dev,
466 void *addr);
467#define HAVE_PRIVATE_IOCTL
468 int (*do_ioctl)(struct net_device *dev,
469 struct ifreq *ifr, int cmd);
470#define HAVE_SET_CONFIG
471 int (*set_config)(struct net_device *dev,
472 struct ifmap *map);
473#define HAVE_HEADER_CACHE
474 int (*hard_header_cache)(struct neighbour *neigh,
475 struct hh_cache *hh);
476 void (*header_cache_update)(struct hh_cache *hh,
477 struct net_device *dev,
478 unsigned char * haddr);
479#define HAVE_CHANGE_MTU
480 int (*change_mtu)(struct net_device *dev, int new_mtu);
481
482#define HAVE_TX_TIMEOUT
483 void (*tx_timeout) (struct net_device *dev);
484
485 void (*vlan_rx_register)(struct net_device *dev,
486 struct vlan_group *grp);
487 void (*vlan_rx_add_vid)(struct net_device *dev,
488 unsigned short vid);
489 void (*vlan_rx_kill_vid)(struct net_device *dev,
490 unsigned short vid);
491
492 int (*hard_header_parse)(struct sk_buff *skb,
493 unsigned char *haddr);
494 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
495#ifdef CONFIG_NETPOLL
115c1d6e 496 struct netpoll_info *npinfo;
1da177e4
LT
497#endif
498#ifdef CONFIG_NET_POLL_CONTROLLER
499 void (*poll_controller)(struct net_device *dev);
500#endif
501
502 /* bridge stuff */
503 struct net_bridge_port *br_port;
504
505#ifdef CONFIG_NET_DIVERT
506 /* this will get initialized at each interface type init routine */
507 struct divert_blk *divert;
508#endif /* CONFIG_NET_DIVERT */
509
510 /* class/net/name entry */
511 struct class_device class_dev;
fe9925b5
SH
512 /* space for optional statistics and wireless sysfs groups */
513 struct attribute_group *sysfs_groups[3];
1da177e4
LT
514};
515
516#define NETDEV_ALIGN 32
517#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
518
519static inline void *netdev_priv(struct net_device *dev)
520{
521 return (char *)dev + ((sizeof(struct net_device)
522 + NETDEV_ALIGN_CONST)
523 & ~NETDEV_ALIGN_CONST);
524}
525
526#define SET_MODULE_OWNER(dev) do { } while (0)
527/* Set the sysfs physical device reference for the network logical device
528 * if set prior to registration will cause a symlink during initialization.
529 */
530#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
531
532struct packet_type {
f2ccd8fa
DM
533 __be16 type; /* This is really htons(ether_type). */
534 struct net_device *dev; /* NULL is wildcarded here */
535 int (*func) (struct sk_buff *,
536 struct net_device *,
537 struct packet_type *,
538 struct net_device *);
1da177e4
LT
539 void *af_packet_priv;
540 struct list_head list;
541};
542
543#include <linux/interrupt.h>
544#include <linux/notifier.h>
545
546extern struct net_device loopback_dev; /* The loopback */
547extern struct net_device *dev_base; /* All devices */
548extern rwlock_t dev_base_lock; /* Device list lock */
549
550extern int netdev_boot_setup_check(struct net_device *dev);
551extern unsigned long netdev_boot_base(const char *prefix, int unit);
552extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
553extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
554extern void dev_add_pack(struct packet_type *pt);
555extern void dev_remove_pack(struct packet_type *pt);
556extern void __dev_remove_pack(struct packet_type *pt);
557
558extern struct net_device *dev_get_by_flags(unsigned short flags,
559 unsigned short mask);
560extern struct net_device *dev_get_by_name(const char *name);
561extern struct net_device *__dev_get_by_name(const char *name);
562extern int dev_alloc_name(struct net_device *dev, const char *name);
563extern int dev_open(struct net_device *dev);
564extern int dev_close(struct net_device *dev);
565extern int dev_queue_xmit(struct sk_buff *skb);
566extern int register_netdevice(struct net_device *dev);
567extern int unregister_netdevice(struct net_device *dev);
568extern void free_netdev(struct net_device *dev);
569extern void synchronize_net(void);
570extern int register_netdevice_notifier(struct notifier_block *nb);
571extern int unregister_netdevice_notifier(struct notifier_block *nb);
572extern int call_netdevice_notifiers(unsigned long val, void *v);
573extern struct net_device *dev_get_by_index(int ifindex);
574extern struct net_device *__dev_get_by_index(int ifindex);
575extern int dev_restart(struct net_device *dev);
576#ifdef CONFIG_NETPOLL_TRAP
577extern int netpoll_trap(void);
578#endif
579
580typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
581extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
582static inline int unregister_gifconf(unsigned int family)
583{
584 return register_gifconf(family, NULL);
585}
586
587/*
588 * Incoming packets are placed on per-cpu queues so that
589 * no locking is needed.
590 */
591
592struct softnet_data
593{
31aa02c5 594 struct net_device *output_queue;
1da177e4
LT
595 struct sk_buff_head input_pkt_queue;
596 struct list_head poll_list;
1da177e4
LT
597 struct sk_buff *completion_queue;
598
599 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL
600#ifdef CONFIG_NET_DMA
601 struct dma_chan *net_dma;
602#endif
1da177e4
LT
603};
604
605DECLARE_PER_CPU(struct softnet_data,softnet_data);
606
607#define HAVE_NETIF_QUEUE
608
56079431 609extern void __netif_schedule(struct net_device *dev);
1da177e4
LT
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 */
56079431 673extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT
674
675#define HAVE_NETIF_RX 1
676extern int netif_rx(struct sk_buff *skb);
677extern int netif_rx_ni(struct sk_buff *skb);
678#define HAVE_NETIF_RECEIVE_SKB 1
679extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 680extern int dev_valid_name(const char *name);
1da177e4
LT
681extern int dev_ioctl(unsigned int cmd, void __user *);
682extern int dev_ethtool(struct ifreq *);
683extern unsigned dev_get_flags(const struct net_device *);
684extern int dev_change_flags(struct net_device *, unsigned);
685extern int dev_change_name(struct net_device *, char *);
686extern int dev_set_mtu(struct net_device *, int);
687extern int dev_set_mac_address(struct net_device *,
688 struct sockaddr *);
689extern void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
690
691extern void dev_init(void);
692
693extern int netdev_nit;
20380731 694extern int netdev_budget;
1da177e4
LT
695
696/* Called by rtnetlink.c:rtnl_unlock() */
697extern void netdev_run_todo(void);
698
699static inline void dev_put(struct net_device *dev)
700{
701 atomic_dec(&dev->refcnt);
702}
703
15333061
SH
704static inline void dev_hold(struct net_device *dev)
705{
706 atomic_inc(&dev->refcnt);
707}
1da177e4
LT
708
709/* Carrier loss detection, dial on demand. The functions netif_carrier_on
710 * and _off may be called from IRQ context, but it is caller
711 * who is responsible for serialization of these calls.
b00055aa
SR
712 *
713 * The name carrier is inappropriate, these functions should really be
714 * called netif_lowerlayer_*() because they represent the state of any
715 * kind of lower layer not just hardware media.
1da177e4
LT
716 */
717
718extern void linkwatch_fire_event(struct net_device *dev);
719
720static inline int netif_carrier_ok(const struct net_device *dev)
721{
722 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
723}
724
725extern void __netdev_watchdog_up(struct net_device *dev);
726
0a242efc 727extern void netif_carrier_on(struct net_device *dev);
1da177e4 728
0a242efc 729extern void netif_carrier_off(struct net_device *dev);
1da177e4 730
b00055aa
SR
731static inline void netif_dormant_on(struct net_device *dev)
732{
733 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
734 linkwatch_fire_event(dev);
735}
736
737static inline void netif_dormant_off(struct net_device *dev)
738{
739 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
740 linkwatch_fire_event(dev);
741}
742
743static inline int netif_dormant(const struct net_device *dev)
744{
745 return test_bit(__LINK_STATE_DORMANT, &dev->state);
746}
747
748
749static inline int netif_oper_up(const struct net_device *dev) {
750 return (dev->operstate == IF_OPER_UP ||
751 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
752}
753
1da177e4
LT
754/* Hot-plugging. */
755static inline int netif_device_present(struct net_device *dev)
756{
757 return test_bit(__LINK_STATE_PRESENT, &dev->state);
758}
759
56079431 760extern void netif_device_detach(struct net_device *dev);
1da177e4 761
56079431 762extern void netif_device_attach(struct net_device *dev);
1da177e4
LT
763
764/*
765 * Network interface message level settings
766 */
767#define HAVE_NETIF_MSG 1
768
769enum {
770 NETIF_MSG_DRV = 0x0001,
771 NETIF_MSG_PROBE = 0x0002,
772 NETIF_MSG_LINK = 0x0004,
773 NETIF_MSG_TIMER = 0x0008,
774 NETIF_MSG_IFDOWN = 0x0010,
775 NETIF_MSG_IFUP = 0x0020,
776 NETIF_MSG_RX_ERR = 0x0040,
777 NETIF_MSG_TX_ERR = 0x0080,
778 NETIF_MSG_TX_QUEUED = 0x0100,
779 NETIF_MSG_INTR = 0x0200,
780 NETIF_MSG_TX_DONE = 0x0400,
781 NETIF_MSG_RX_STATUS = 0x0800,
782 NETIF_MSG_PKTDATA = 0x1000,
783 NETIF_MSG_HW = 0x2000,
784 NETIF_MSG_WOL = 0x4000,
785};
786
787#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
788#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
789#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
790#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
791#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
792#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
793#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
794#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
795#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
796#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
797#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
798#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
799#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
800#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
801#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
802
803static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
804{
805 /* use default */
806 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
807 return default_msg_enable_bits;
808 if (debug_value == 0) /* no output */
809 return 0;
810 /* set low N bits */
811 return (1 << debug_value) - 1;
812}
813
0a122576
SH
814/* Test if receive needs to be scheduled */
815static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH
816{
817 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
818}
1da177e4 819
0a122576 820/* Test if receive needs to be scheduled but only if up */
1da177e4
LT
821static inline int netif_rx_schedule_prep(struct net_device *dev)
822{
0a122576 823 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT
824}
825
826/* Add interface to tail of rx poll list. This assumes that _prep has
827 * already been called and returned 1.
828 */
829
56079431 830extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT
831
832/* Try to reschedule poll. Called by irq handler. */
833
834static inline void netif_rx_schedule(struct net_device *dev)
835{
836 if (netif_rx_schedule_prep(dev))
837 __netif_rx_schedule(dev);
838}
839
d3240312
SH
840/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
841 * Do not inline this?
842 */
1da177e4
LT
843static inline int netif_rx_reschedule(struct net_device *dev, int undo)
844{
845 if (netif_rx_schedule_prep(dev)) {
846 unsigned long flags;
d3240312
SH
847
848 dev->quota += undo;
849
1da177e4 850 local_irq_save(flags);
d3240312
SH
851 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
852 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT
853 local_irq_restore(flags);
854 return 1;
855 }
856 return 0;
857}
858
859/* Remove interface from poll list: it must be in the poll list
860 * on current cpu. This primitive is called by dev->poll(), when
861 * it completes the work. The device cannot be out of poll list at this
862 * moment, it is BUG().
863 */
864static inline void netif_rx_complete(struct net_device *dev)
865{
866 unsigned long flags;
867
868 local_irq_save(flags);
869 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
870 list_del(&dev->poll_list);
871 smp_mb__before_clear_bit();
872 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
873 local_irq_restore(flags);
874}
875
876static inline void netif_poll_disable(struct net_device *dev)
877{
3173c890 878 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 879 /* No hurry. */
3173c890 880 schedule_timeout_interruptible(1);
1da177e4
LT
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
932ff279
HX
899static inline void netif_tx_lock(struct net_device *dev)
900{
901 spin_lock(&dev->_xmit_lock);
902 dev->xmit_lock_owner = smp_processor_id();
903}
904
905static inline void netif_tx_lock_bh(struct net_device *dev)
906{
907 spin_lock_bh(&dev->_xmit_lock);
908 dev->xmit_lock_owner = smp_processor_id();
909}
910
911static inline int netif_tx_trylock(struct net_device *dev)
912{
913 int err = spin_trylock(&dev->_xmit_lock);
914 if (!err)
915 dev->xmit_lock_owner = smp_processor_id();
916 return err;
917}
918
919static inline void netif_tx_unlock(struct net_device *dev)
920{
921 dev->xmit_lock_owner = -1;
922 spin_unlock(&dev->_xmit_lock);
923}
924
925static inline void netif_tx_unlock_bh(struct net_device *dev)
926{
927 dev->xmit_lock_owner = -1;
928 spin_unlock_bh(&dev->_xmit_lock);
929}
930
1da177e4
LT
931static inline void netif_tx_disable(struct net_device *dev)
932{
932ff279 933 netif_tx_lock_bh(dev);
1da177e4 934 netif_stop_queue(dev);
932ff279 935 netif_tx_unlock_bh(dev);
1da177e4
LT
936}
937
938/* These functions live elsewhere (drivers/net/net_init.c, but related) */
939
940extern void ether_setup(struct net_device *dev);
941
942/* Support for loadable net-drivers */
943extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
944 void (*setup)(struct net_device *));
945extern int register_netdev(struct net_device *dev);
946extern void unregister_netdev(struct net_device *dev);
947/* Functions used for multicast support */
948extern void dev_mc_upload(struct net_device *dev);
949extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
950extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
951extern void dev_mc_discard(struct net_device *dev);
952extern void dev_set_promiscuity(struct net_device *dev, int inc);
953extern void dev_set_allmulti(struct net_device *dev, int inc);
954extern void netdev_state_change(struct net_device *dev);
d8a33ac4 955extern void netdev_features_change(struct net_device *dev);
1da177e4
LT
956/* Load a device via the kmod */
957extern void dev_load(const char *name);
958extern void dev_mcast_init(void);
959extern int netdev_max_backlog;
960extern int weight_p;
961extern int netdev_set_master(struct net_device *dev, struct net_device *master);
962extern int skb_checksum_help(struct sk_buff *skb, int inward);
fb286bb2
HX
963#ifdef CONFIG_BUG
964extern void netdev_rx_csum_fault(struct net_device *dev);
965#else
966static inline void netdev_rx_csum_fault(struct net_device *dev)
967{
968}
969#endif
1da177e4
LT
970/* rx skb timestamps */
971extern void net_enable_timestamp(void);
972extern void net_disable_timestamp(void);
973
20380731
ACM
974#ifdef CONFIG_PROC_FS
975extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
976extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
977extern void dev_seq_stop(struct seq_file *seq, void *v);
978#endif
979
980extern void linkwatch_run_queue(void);
981
1da177e4
LT
982#endif /* __KERNEL__ */
983
984#endif /* _LINUX_DEV_H */