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[NETPOLL]: make arp replies through netpoll use mac address of sender
[net-next-2.6.git] / include / linux / netdevice.h
CommitLineData
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__
d7fe0f24 33#include <linux/timer.h>
1da177e4
LT		 34#include <asm/atomic.h>
35#include <asm/cache.h>
36#include <asm/byteorder.h>
37
1da177e4
LT		 38#include <linux/device.h>
39#include <linux/percpu.h>
db217334 40#include <linux/dmaengine.h>
1da177e4 41
1da177e4
LT		 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
b9df3cb8
GR		 70/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
71 * indicates that the device will soon be dropping packets, or already drops
72 * some packets of the same priority; prompting us to send less aggressively. */
73#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 74#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
75
76#endif
77
78#define MAX_ADDR_LEN 32 /* Largest hardware address length */
79
80/* Driver transmit return codes */
81#define NETDEV_TX_OK 0 /* driver took care of packet */
82#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
83#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
84
85/*
86 * Compute the worst case header length according to the protocols
87 * used.
88 */
89
90#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
91#define LL_MAX_HEADER 32
92#else
93#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
94#define LL_MAX_HEADER 96
95#else
96#define LL_MAX_HEADER 48
97#endif
98#endif
99
e81c7359
DM		 100#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
101 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
102 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
103 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 104#define MAX_HEADER LL_MAX_HEADER
105#else
106#define MAX_HEADER (LL_MAX_HEADER + 48)
107#endif
108
109/*
110 * Network device statistics. Akin to the 2.0 ether stats but
111 * with byte counters.
112 */
113
114struct net_device_stats
115{
116 unsigned long rx_packets; /* total packets received */
117 unsigned long tx_packets; /* total packets transmitted */
118 unsigned long rx_bytes; /* total bytes received */
119 unsigned long tx_bytes; /* total bytes transmitted */
120 unsigned long rx_errors; /* bad packets received */
121 unsigned long tx_errors; /* packet transmit problems */
122 unsigned long rx_dropped; /* no space in linux buffers */
123 unsigned long tx_dropped; /* no space available in linux */
124 unsigned long multicast; /* multicast packets received */
125 unsigned long collisions;
126
127 /* detailed rx_errors: */
128 unsigned long rx_length_errors;
129 unsigned long rx_over_errors; /* receiver ring buff overflow */
130 unsigned long rx_crc_errors; /* recved pkt with crc error */
131 unsigned long rx_frame_errors; /* recv'd frame alignment error */
132 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
133 unsigned long rx_missed_errors; /* receiver missed packet */
134
135 /* detailed tx_errors */
136 unsigned long tx_aborted_errors;
137 unsigned long tx_carrier_errors;
138 unsigned long tx_fifo_errors;
139 unsigned long tx_heartbeat_errors;
140 unsigned long tx_window_errors;
141
142 /* for cslip etc */
143 unsigned long rx_compressed;
144 unsigned long tx_compressed;
145};
146
147
148/* Media selection options. */
149enum {
150 IF_PORT_UNKNOWN = 0,
151 IF_PORT_10BASE2,
152 IF_PORT_10BASET,
153 IF_PORT_AUI,
154 IF_PORT_100BASET,
155 IF_PORT_100BASETX,
156 IF_PORT_100BASEFX
157};
158
159#ifdef __KERNEL__
160
161#include <linux/cache.h>
162#include <linux/skbuff.h>
163
164struct neighbour;
165struct neigh_parms;
166struct sk_buff;
167
168struct netif_rx_stats
169{
170 unsigned total;
171 unsigned dropped;
172 unsigned time_squeeze;
1da177e4
LT		 173 unsigned cpu_collision;
174};
175
176DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
177
178
179/*
180 * We tag multicasts with these structures.
181 */
182
183struct dev_mc_list
184{
185 struct dev_mc_list *next;
186 __u8 dmi_addr[MAX_ADDR_LEN];
187 unsigned char dmi_addrlen;
188 int dmi_users;
189 int dmi_gusers;
190};
191
192struct hh_cache
193{
194 struct hh_cache *hh_next; /* Next entry */
195 atomic_t hh_refcnt; /* number of users */
d77072ec 196 __be16 hh_type; /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 197 * NOTE: For VLANs, this will be the
198 * encapuslated type. --BLG
199 */
d5c42c0e 200 u16 hh_len; /* length of header */
1da177e4 201 int (*hh_output)(struct sk_buff *skb);
3644f0ce 202 seqlock_t hh_lock;
1da177e4
LT		 203
204 /* cached hardware header; allow for machine alignment needs. */
205#define HH_DATA_MOD 16
206#define HH_DATA_OFF(__len) \
5ba0eac6 207 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 208#define HH_DATA_ALIGN(__len) \
209 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
210 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
211};
212
213/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
214 * Alternative is:
215 * dev->hard_header_len ? (dev->hard_header_len +
216 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
217 *
218 * We could use other alignment values, but we must maintain the
219 * relationship HH alignment <= LL alignment.
220 */
221#define LL_RESERVED_SPACE(dev) \
222 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
223#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
224 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
225
226/* These flag bits are private to the generic network queueing
227 * layer, they may not be explicitly referenced by any other
228 * code.
229 */
230
231enum netdev_state_t
232{
233 __LINK_STATE_XOFF=0,
234 __LINK_STATE_START,
235 __LINK_STATE_PRESENT,
236 __LINK_STATE_SCHED,
237 __LINK_STATE_NOCARRIER,
238 __LINK_STATE_RX_SCHED,
b00055aa
SR		 239 __LINK_STATE_LINKWATCH_PENDING,
240 __LINK_STATE_DORMANT,
48d83325 241 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 242};
243
244
245/*
246 * This structure holds at boot time configured netdevice settings. They
247 * are then used in the device probing.
248 */
249struct netdev_boot_setup {
250 char name[IFNAMSIZ];
251 struct ifmap map;
252};
253#define NETDEV_BOOT_SETUP_MAX 8
254
20380731 255extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 256
257/*
258 * The DEVICE structure.
259 * Actually, this whole structure is a big mistake. It mixes I/O
260 * data with strictly "high-level" data, and it has to know about
261 * almost every data structure used in the INET module.
262 *
263 * FIXME: cleanup struct net_device such that network protocol info
264 * moves out.
265 */
266
267struct net_device
268{
269
270 /*
271 * This is the first field of the "visible" part of this structure
272 * (i.e. as seen by users in the "Space.c" file). It is the name
273 * the interface.
274 */
275 char name[IFNAMSIZ];
9356b8fc
ED		 276 /* device name hash chain */
277 struct hlist_node name_hlist;
1da177e4
LT		 278
279 /*
280 * I/O specific fields
281 * FIXME: Merge these and struct ifmap into one
282 */
283 unsigned long mem_end; /* shared mem end */
284 unsigned long mem_start; /* shared mem start */
285 unsigned long base_addr; /* device I/O address */
286 unsigned int irq; /* device IRQ number */
287
288 /*
289 * Some hardware also needs these fields, but they are not
290 * part of the usual set specified in Space.c.
291 */
292
293 unsigned char if_port; /* Selectable AUI, TP,..*/
294 unsigned char dma; /* DMA channel */
295
296 unsigned long state;
297
298 struct net_device *next;
299
300 /* The device initialization function. Called only once. */
301 int (*init)(struct net_device *dev);
302
303 /* ------- Fields preinitialized in Space.c finish here ------- */
304
9356b8fc
ED		 305 /* Net device features */
306 unsigned long features;
307#define NETIF_F_SG 1 /* Scatter/gather IO. */
308#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
309#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
310#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
311#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
312#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
313#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
314#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
315#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
316#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 317#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 318#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 319
320 /* Segmentation offload features */
321#define NETIF_F_GSO_SHIFT 16
bcd76111 322#define NETIF_F_GSO_MASK 0xffff0000
7967168c 323#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 324#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 325#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 326#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
327#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 328
78eb8877
HX		 329 /* List of features with software fallbacks. */
330#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
331
8648b305
HX		 332#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
333#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
334
1da177e4
LT		 335 struct net_device *next_sched;
336
337 /* Interface index. Unique device identifier */
338 int ifindex;
339 int iflink;
340
341
342 struct net_device_stats* (*get_stats)(struct net_device *dev);
1da177e4
LT		 343
344 /* List of functions to handle Wireless Extensions (instead of ioctl).
345 * See <net/iw_handler.h> for details. Jean II */
346 const struct iw_handler_def * wireless_handlers;
347 /* Instance data managed by the core of Wireless Extensions. */
348 struct iw_public_data * wireless_data;
349
76fd8593 350 const struct ethtool_ops *ethtool_ops;
1da177e4
LT		 351
352 /*
353 * This marks the end of the "visible" part of the structure. All
354 * fields hereafter are internal to the system, and may change at
355 * will (read: may be cleaned up at will).
356 */
357
1da177e4 358
b00055aa 359 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 360 unsigned short gflags;
361 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
362 unsigned short padded; /* How much padding added by alloc_netdev() */
363
b00055aa
SR		 364 unsigned char operstate; /* RFC2863 operstate */
365 unsigned char link_mode; /* mapping policy to operstate */
366
1da177e4
LT		 367 unsigned mtu; /* interface MTU value */
368 unsigned short type; /* interface hardware type */
369 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 370
371 struct net_device *master; /* Pointer to master device of a group,
372 * which this device is member of.
373 */
374
375 /* Interface address info. */
a6f9a705 376 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 377 unsigned char addr_len; /* hardware address length */
378 unsigned short dev_id; /* for shared network cards */
379
380 struct dev_mc_list *mc_list; /* Multicast mac addresses */
381 int mc_count; /* Number of installed mcasts */
382 int promiscuity;
383 int allmulti;
384
1da177e4
LT		 385
386 /* Protocol specific pointers */
387
388 void *atalk_ptr; /* AppleTalk link */
389 void *ip_ptr; /* IPv4 specific data */
390 void *dn_ptr; /* DECnet specific data */
391 void *ip6_ptr; /* IPv6 specific data */
392 void *ec_ptr; /* Econet specific data */
393 void *ax25_ptr; /* AX.25 specific data */
394
9356b8fc
ED		 395/*
396 * Cache line mostly used on receive path (including eth_type_trans())
397 */
398 struct list_head poll_list ____cacheline_aligned_in_smp;
399 /* Link to poll list */
400
401 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 402 int quota;
403 int weight;
9356b8fc
ED		 404 unsigned long last_rx; /* Time of last Rx */
405 /* Interface address info used in eth_type_trans() */
406 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
407 because most packets are unicast) */
408
409 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 410
9356b8fc
ED		 411/*
412 * Cache line mostly used on queue transmit path (qdisc)
413 */
414 /* device queue lock */
415 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 416 struct Qdisc *qdisc;
417 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 418 struct list_head qdisc_list;
419 unsigned long tx_queue_len; /* Max frames per queue allowed */
420
f6a78bfc
HX		 421 /* Partially transmitted GSO packet. */
422 struct sk_buff *gso_skb;
423
1da177e4
LT		 424 /* ingress path synchronizer */
425 spinlock_t ingress_lock;
9356b8fc
ED		 426 struct Qdisc *qdisc_ingress;
427
428/*
429 * One part is mostly used on xmit path (device)
430 */
1da177e4 431 /* hard_start_xmit synchronizer */
932ff279 432 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 433 /* cpu id of processor entered to hard_start_xmit or -1,
434 if nobody entered there.
435 */
436 int xmit_lock_owner;
9356b8fc
ED		 437 void *priv; /* pointer to private data */
438 int (*hard_start_xmit) (struct sk_buff *skb,
439 struct net_device *dev);
440 /* These may be needed for future network-power-down code. */
441 unsigned long trans_start; /* Time (in jiffies) of last Tx */
442
443 int watchdog_timeo; /* used by dev_watchdog() */
444 struct timer_list watchdog_timer;
445
446/*
447 * refcnt is a very hot point, so align it on SMP
448 */
1da177e4 449 /* Number of references to this device */
9356b8fc
ED		 450 atomic_t refcnt ____cacheline_aligned_in_smp;
451
1da177e4
LT		 452 /* delayed register/unregister */
453 struct list_head todo_list;
1da177e4
LT		 454 /* device index hash chain */
455 struct hlist_node index_hlist;
456
457 /* register/unregister state machine */
458 enum { NETREG_UNINITIALIZED=0,
b17a7c17 459 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 460 NETREG_UNREGISTERING, /* called unregister_netdevice */
461 NETREG_UNREGISTERED, /* completed unregister todo */
462 NETREG_RELEASED, /* called free_netdev */
463 } reg_state;
464
1da177e4
LT		 465 /* Called after device is detached from network. */
466 void (*uninit)(struct net_device *dev);
467 /* Called after last user reference disappears. */
468 void (*destructor)(struct net_device *dev);
469
470 /* Pointers to interface service routines. */
471 int (*open)(struct net_device *dev);
472 int (*stop)(struct net_device *dev);
1da177e4 473#define HAVE_NETDEV_POLL
1da177e4
LT		 474 int (*hard_header) (struct sk_buff *skb,
475 struct net_device *dev,
476 unsigned short type,
477 void *daddr,
478 void *saddr,
479 unsigned len);
480 int (*rebuild_header)(struct sk_buff *skb);
481#define HAVE_MULTICAST
482 void (*set_multicast_list)(struct net_device *dev);
483#define HAVE_SET_MAC_ADDR
484 int (*set_mac_address)(struct net_device *dev,
485 void *addr);
486#define HAVE_PRIVATE_IOCTL
487 int (*do_ioctl)(struct net_device *dev,
488 struct ifreq *ifr, int cmd);
489#define HAVE_SET_CONFIG
490 int (*set_config)(struct net_device *dev,
491 struct ifmap *map);
492#define HAVE_HEADER_CACHE
493 int (*hard_header_cache)(struct neighbour *neigh,
494 struct hh_cache *hh);
495 void (*header_cache_update)(struct hh_cache *hh,
496 struct net_device *dev,
497 unsigned char * haddr);
498#define HAVE_CHANGE_MTU
499 int (*change_mtu)(struct net_device *dev, int new_mtu);
500
501#define HAVE_TX_TIMEOUT
502 void (*tx_timeout) (struct net_device *dev);
503
504 void (*vlan_rx_register)(struct net_device *dev,
505 struct vlan_group *grp);
506 void (*vlan_rx_add_vid)(struct net_device *dev,
507 unsigned short vid);
508 void (*vlan_rx_kill_vid)(struct net_device *dev,
509 unsigned short vid);
510
511 int (*hard_header_parse)(struct sk_buff *skb,
512 unsigned char *haddr);
513 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
514#ifdef CONFIG_NETPOLL
115c1d6e 515 struct netpoll_info *npinfo;
1da177e4
LT		 516#endif
517#ifdef CONFIG_NET_POLL_CONTROLLER
518 void (*poll_controller)(struct net_device *dev);
519#endif
520
521 /* bridge stuff */
522 struct net_bridge_port *br_port;
523
1da177e4
LT		 524 /* class/net/name entry */
525 struct class_device class_dev;
fe9925b5
SH		 526 /* space for optional statistics and wireless sysfs groups */
527 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 528};
529
530#define NETDEV_ALIGN 32
531#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
532
533static inline void *netdev_priv(struct net_device *dev)
534{
535 return (char *)dev + ((sizeof(struct net_device)
536 + NETDEV_ALIGN_CONST)
537 & ~NETDEV_ALIGN_CONST);
538}
539
540#define SET_MODULE_OWNER(dev) do { } while (0)
541/* Set the sysfs physical device reference for the network logical device
542 * if set prior to registration will cause a symlink during initialization.
543 */
544#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
545
546struct packet_type {
f2ccd8fa
DM		 547 __be16 type; /* This is really htons(ether_type). */
548 struct net_device *dev; /* NULL is wildcarded here */
549 int (*func) (struct sk_buff *,
550 struct net_device *,
551 struct packet_type *,
552 struct net_device *);
576a30eb
HX		 553 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
554 int features);
a430a43d 555 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 556 void *af_packet_priv;
557 struct list_head list;
558};
559
560#include <linux/interrupt.h>
561#include <linux/notifier.h>
562
563extern struct net_device loopback_dev; /* The loopback */
564extern struct net_device *dev_base; /* All devices */
565extern rwlock_t dev_base_lock; /* Device list lock */
566
567extern int netdev_boot_setup_check(struct net_device *dev);
568extern unsigned long netdev_boot_base(const char *prefix, int unit);
569extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
570extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
571extern void dev_add_pack(struct packet_type *pt);
572extern void dev_remove_pack(struct packet_type *pt);
573extern void __dev_remove_pack(struct packet_type *pt);
574
575extern struct net_device *dev_get_by_flags(unsigned short flags,
576 unsigned short mask);
577extern struct net_device *dev_get_by_name(const char *name);
578extern struct net_device *__dev_get_by_name(const char *name);
579extern int dev_alloc_name(struct net_device *dev, const char *name);
580extern int dev_open(struct net_device *dev);
581extern int dev_close(struct net_device *dev);
582extern int dev_queue_xmit(struct sk_buff *skb);
583extern int register_netdevice(struct net_device *dev);
584extern int unregister_netdevice(struct net_device *dev);
585extern void free_netdev(struct net_device *dev);
586extern void synchronize_net(void);
587extern int register_netdevice_notifier(struct notifier_block *nb);
588extern int unregister_netdevice_notifier(struct notifier_block *nb);
589extern int call_netdevice_notifiers(unsigned long val, void *v);
590extern struct net_device *dev_get_by_index(int ifindex);
591extern struct net_device *__dev_get_by_index(int ifindex);
592extern int dev_restart(struct net_device *dev);
593#ifdef CONFIG_NETPOLL_TRAP
594extern int netpoll_trap(void);
595#endif
596
597typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
598extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
599static inline int unregister_gifconf(unsigned int family)
600{
601 return register_gifconf(family, NULL);
602}
603
604/*
605 * Incoming packets are placed on per-cpu queues so that
606 * no locking is needed.
607 */
608
609struct softnet_data
610{
31aa02c5 611 struct net_device *output_queue;
1da177e4
LT		 612 struct sk_buff_head input_pkt_queue;
613 struct list_head poll_list;
1da177e4
LT		 614 struct sk_buff *completion_queue;
615
616 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 617#ifdef CONFIG_NET_DMA
618 struct dma_chan *net_dma;
619#endif
1da177e4
LT		 620};
621
622DECLARE_PER_CPU(struct softnet_data,softnet_data);
623
624#define HAVE_NETIF_QUEUE
625
56079431 626extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 627
628static inline void netif_schedule(struct net_device *dev)
629{
630 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
631 __netif_schedule(dev);
632}
633
634static inline void netif_start_queue(struct net_device *dev)
635{
636 clear_bit(__LINK_STATE_XOFF, &dev->state);
637}
638
639static inline void netif_wake_queue(struct net_device *dev)
640{
641#ifdef CONFIG_NETPOLL_TRAP
642 if (netpoll_trap())
643 return;
644#endif
645 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
646 __netif_schedule(dev);
647}
648
649static inline void netif_stop_queue(struct net_device *dev)
650{
651#ifdef CONFIG_NETPOLL_TRAP
652 if (netpoll_trap())
653 return;
654#endif
655 set_bit(__LINK_STATE_XOFF, &dev->state);
656}
657
658static inline int netif_queue_stopped(const struct net_device *dev)
659{
660 return test_bit(__LINK_STATE_XOFF, &dev->state);
661}
662
663static inline int netif_running(const struct net_device *dev)
664{
665 return test_bit(__LINK_STATE_START, &dev->state);
666}
667
668
669/* Use this variant when it is known for sure that it
670 * is executing from interrupt context.
671 */
672static inline void dev_kfree_skb_irq(struct sk_buff *skb)
673{
674 if (atomic_dec_and_test(&skb->users)) {
675 struct softnet_data *sd;
676 unsigned long flags;
677
678 local_irq_save(flags);
679 sd = &__get_cpu_var(softnet_data);
680 skb->next = sd->completion_queue;
681 sd->completion_queue = skb;
682 raise_softirq_irqoff(NET_TX_SOFTIRQ);
683 local_irq_restore(flags);
684 }
685}
686
687/* Use this variant in places where it could be invoked
688 * either from interrupt or non-interrupt context.
689 */
56079431 690extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 691
692#define HAVE_NETIF_RX 1
693extern int netif_rx(struct sk_buff *skb);
694extern int netif_rx_ni(struct sk_buff *skb);
695#define HAVE_NETIF_RECEIVE_SKB 1
696extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 697extern int dev_valid_name(const char *name);
1da177e4
LT		 698extern int dev_ioctl(unsigned int cmd, void __user *);
699extern int dev_ethtool(struct ifreq *);
700extern unsigned dev_get_flags(const struct net_device *);
701extern int dev_change_flags(struct net_device *, unsigned);
702extern int dev_change_name(struct net_device *, char *);
703extern int dev_set_mtu(struct net_device *, int);
704extern int dev_set_mac_address(struct net_device *,
705 struct sockaddr *);
f6a78bfc
HX		 706extern int dev_hard_start_xmit(struct sk_buff *skb,
707 struct net_device *dev);
1da177e4
LT		 708
709extern void dev_init(void);
710
20380731 711extern int netdev_budget;
1da177e4
LT		 712
713/* Called by rtnetlink.c:rtnl_unlock() */
714extern void netdev_run_todo(void);
715
716static inline void dev_put(struct net_device *dev)
717{
718 atomic_dec(&dev->refcnt);
719}
720
15333061
SH		 721static inline void dev_hold(struct net_device *dev)
722{
723 atomic_inc(&dev->refcnt);
724}
1da177e4
LT		 725
726/* Carrier loss detection, dial on demand. The functions netif_carrier_on
727 * and _off may be called from IRQ context, but it is caller
728 * who is responsible for serialization of these calls.
b00055aa
SR		 729 *
730 * The name carrier is inappropriate, these functions should really be
731 * called netif_lowerlayer_*() because they represent the state of any
732 * kind of lower layer not just hardware media.
1da177e4
LT		 733 */
734
735extern void linkwatch_fire_event(struct net_device *dev);
736
737static inline int netif_carrier_ok(const struct net_device *dev)
738{
739 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
740}
741
742extern void __netdev_watchdog_up(struct net_device *dev);
743
0a242efc 744extern void netif_carrier_on(struct net_device *dev);
1da177e4 745
0a242efc 746extern void netif_carrier_off(struct net_device *dev);
1da177e4 747
b00055aa
SR		 748static inline void netif_dormant_on(struct net_device *dev)
749{
750 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
751 linkwatch_fire_event(dev);
752}
753
754static inline void netif_dormant_off(struct net_device *dev)
755{
756 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
757 linkwatch_fire_event(dev);
758}
759
760static inline int netif_dormant(const struct net_device *dev)
761{
762 return test_bit(__LINK_STATE_DORMANT, &dev->state);
763}
764
765
766static inline int netif_oper_up(const struct net_device *dev) {
767 return (dev->operstate == IF_OPER_UP ||
768 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
769}
770
1da177e4
LT		 771/* Hot-plugging. */
772static inline int netif_device_present(struct net_device *dev)
773{
774 return test_bit(__LINK_STATE_PRESENT, &dev->state);
775}
776
56079431 777extern void netif_device_detach(struct net_device *dev);
1da177e4 778
56079431 779extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 780
781/*
782 * Network interface message level settings
783 */
784#define HAVE_NETIF_MSG 1
785
786enum {
787 NETIF_MSG_DRV = 0x0001,
788 NETIF_MSG_PROBE = 0x0002,
789 NETIF_MSG_LINK = 0x0004,
790 NETIF_MSG_TIMER = 0x0008,
791 NETIF_MSG_IFDOWN = 0x0010,
792 NETIF_MSG_IFUP = 0x0020,
793 NETIF_MSG_RX_ERR = 0x0040,
794 NETIF_MSG_TX_ERR = 0x0080,
795 NETIF_MSG_TX_QUEUED = 0x0100,
796 NETIF_MSG_INTR = 0x0200,
797 NETIF_MSG_TX_DONE = 0x0400,
798 NETIF_MSG_RX_STATUS = 0x0800,
799 NETIF_MSG_PKTDATA = 0x1000,
800 NETIF_MSG_HW = 0x2000,
801 NETIF_MSG_WOL = 0x4000,
802};
803
804#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
805#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
806#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
807#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
808#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
809#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
810#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
811#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
812#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
813#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
814#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
815#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
816#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
817#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
818#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
819
820static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
821{
822 /* use default */
823 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
824 return default_msg_enable_bits;
825 if (debug_value == 0) /* no output */
826 return 0;
827 /* set low N bits */
828 return (1 << debug_value) - 1;
829}
830
0a122576
SH		 831/* Test if receive needs to be scheduled */
832static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 833{
834 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
835}
1da177e4 836
0a122576 837/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 838static inline int netif_rx_schedule_prep(struct net_device *dev)
839{
0a122576 840 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 841}
842
843/* Add interface to tail of rx poll list. This assumes that _prep has
844 * already been called and returned 1.
845 */
846
56079431 847extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 848
849/* Try to reschedule poll. Called by irq handler. */
850
851static inline void netif_rx_schedule(struct net_device *dev)
852{
853 if (netif_rx_schedule_prep(dev))
854 __netif_rx_schedule(dev);
855}
856
d3240312
SH		 857/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
858 * Do not inline this?
859 */
1da177e4
LT		 860static inline int netif_rx_reschedule(struct net_device *dev, int undo)
861{
862 if (netif_rx_schedule_prep(dev)) {
863 unsigned long flags;
d3240312
SH		 864
865 dev->quota += undo;
866
1da177e4 867 local_irq_save(flags);
d3240312
SH		 868 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
869 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 870 local_irq_restore(flags);
871 return 1;
872 }
873 return 0;
874}
875
876/* Remove interface from poll list: it must be in the poll list
877 * on current cpu. This primitive is called by dev->poll(), when
878 * it completes the work. The device cannot be out of poll list at this
879 * moment, it is BUG().
880 */
881static inline void netif_rx_complete(struct net_device *dev)
882{
883 unsigned long flags;
884
885 local_irq_save(flags);
886 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
887 list_del(&dev->poll_list);
888 smp_mb__before_clear_bit();
889 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
890 local_irq_restore(flags);
891}
892
893static inline void netif_poll_disable(struct net_device *dev)
894{
3173c890 895 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 896 /* No hurry. */
3173c890 897 schedule_timeout_interruptible(1);
1da177e4
LT		 898}
899
900static inline void netif_poll_enable(struct net_device *dev)
901{
902 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
903}
904
905/* same as netif_rx_complete, except that local_irq_save(flags)
906 * has already been issued
907 */
908static inline void __netif_rx_complete(struct net_device *dev)
909{
910 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
911 list_del(&dev->poll_list);
912 smp_mb__before_clear_bit();
913 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
914}
915
932ff279
HX		 916static inline void netif_tx_lock(struct net_device *dev)
917{
918 spin_lock(&dev->_xmit_lock);
919 dev->xmit_lock_owner = smp_processor_id();
920}
921
922static inline void netif_tx_lock_bh(struct net_device *dev)
923{
924 spin_lock_bh(&dev->_xmit_lock);
925 dev->xmit_lock_owner = smp_processor_id();
926}
927
928static inline int netif_tx_trylock(struct net_device *dev)
929{
53c4b2cc
HX		 930 int ok = spin_trylock(&dev->_xmit_lock);
931 if (likely(ok))
932ff279 932 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 933 return ok;
932ff279
HX		 934}
935
936static inline void netif_tx_unlock(struct net_device *dev)
937{
938 dev->xmit_lock_owner = -1;
939 spin_unlock(&dev->_xmit_lock);
940}
941
942static inline void netif_tx_unlock_bh(struct net_device *dev)
943{
944 dev->xmit_lock_owner = -1;
945 spin_unlock_bh(&dev->_xmit_lock);
946}
947
1da177e4
LT		 948static inline void netif_tx_disable(struct net_device *dev)
949{
932ff279 950 netif_tx_lock_bh(dev);
1da177e4 951 netif_stop_queue(dev);
932ff279 952 netif_tx_unlock_bh(dev);
1da177e4
LT		 953}
954
955/* These functions live elsewhere (drivers/net/net_init.c, but related) */
956
957extern void ether_setup(struct net_device *dev);
958
959/* Support for loadable net-drivers */
960extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
961 void (*setup)(struct net_device *));
962extern int register_netdev(struct net_device *dev);
963extern void unregister_netdev(struct net_device *dev);
964/* Functions used for multicast support */
965extern void dev_mc_upload(struct net_device *dev);
966extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
967extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
968extern void dev_mc_discard(struct net_device *dev);
969extern void dev_set_promiscuity(struct net_device *dev, int inc);
970extern void dev_set_allmulti(struct net_device *dev, int inc);
971extern void netdev_state_change(struct net_device *dev);
d8a33ac4 972extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 973/* Load a device via the kmod */
974extern void dev_load(const char *name);
975extern void dev_mcast_init(void);
976extern int netdev_max_backlog;
977extern int weight_p;
978extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 979extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 980extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 981#ifdef CONFIG_BUG
982extern void netdev_rx_csum_fault(struct net_device *dev);
983#else
984static inline void netdev_rx_csum_fault(struct net_device *dev)
985{
986}
987#endif
1da177e4
LT		 988/* rx skb timestamps */
989extern void net_enable_timestamp(void);
990extern void net_disable_timestamp(void);
991
20380731
ACM		 992#ifdef CONFIG_PROC_FS
993extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
994extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
995extern void dev_seq_stop(struct seq_file *seq, void *v);
996#endif
997
998extern void linkwatch_run_queue(void);
999
bcd76111 1000static inline int net_gso_ok(int features, int gso_type)
576a30eb 1001{
bcd76111 1002 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1003 return (features & feature) == feature;
576a30eb
HX		 1004}
1005
bcd76111
HX		 1006static inline int skb_gso_ok(struct sk_buff *skb, int features)
1007{
a430a43d 1008 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1009}
1010
7967168c
HX		 1011static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1012{
a430a43d
HX		 1013 return skb_is_gso(skb) &&
1014 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1015 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1016}
1017
7ea49ed7 1018/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1019 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1020 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1021 */
1022static inline int skb_bond_should_drop(struct sk_buff *skb)
1023{
1024 struct net_device *dev = skb->dev;
1025 struct net_device *master = dev->master;
1026
1027 if (master &&
1028 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1029 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1030 skb->protocol == __constant_htons(ETH_P_ARP))
1031 return 0;
1032
7ea49ed7
DM		 1033 if (master->priv_flags & IFF_MASTER_ALB) {
1034 if (skb->pkt_type != PACKET_BROADCAST &&
1035 skb->pkt_type != PACKET_MULTICAST)
1036 return 0;
1037 }
1038 if (master->priv_flags & IFF_MASTER_8023AD &&
1039 skb->protocol == __constant_htons(ETH_P_SLOW))
1040 return 0;
1041
1042 return 1;
1043 }
1044 return 0;
1045}
1046
1da177e4
LT		 1047#endif /* __KERNEL__ */
1048
1049#endif /* _LINUX_DEV_H */
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