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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Jesper Juhl02c30a82005-05-05 16:16:16 -070010 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * 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__
Al Virod7fe0f22006-12-03 23:15:30 -050033#include <linux/timer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/atomic.h>
35#include <asm/cache.h>
36#include <asm/byteorder.h>
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/device.h>
39#include <linux/percpu.h>
Chris Leechdb217332006-06-17 21:24:58 -070040#include <linux/dmaengine.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042struct vlan_group;
43struct ethtool_ops;
Jeff Moyer115c1d62005-06-22 22:05:31 -070044struct netpoll_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 /* 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
Gerrit Renkerb9df3cb2006-11-14 11:21:36 -020070/* 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))
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#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
David S. Millere81c7352006-11-28 20:53:39 -0800100#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)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104#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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 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 */
Eric Dumazetf0490982006-12-08 00:08:43 -0800196/*
197 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
198 * cache line on SMP.
199 * They are mostly read, but hh_refcnt may be changed quite frequently,
200 * incurring cache line ping pongs.
201 */
202 __be16 hh_type ____cacheline_aligned_in_smp;
203 /* protocol identifier, f.e ETH_P_IP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 * NOTE: For VLANs, this will be the
205 * encapuslated type. --BLG
206 */
Arnaldo Carvalho de Melod5c42c02006-11-27 17:58:02 -0200207 u16 hh_len; /* length of header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 int (*hh_output)(struct sk_buff *skb);
Stephen Hemminger3644f0c2006-12-07 15:08:17 -0800209 seqlock_t hh_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 /* cached hardware header; allow for machine alignment needs. */
212#define HH_DATA_MOD 16
213#define HH_DATA_OFF(__len) \
Jiri Benc5ba0eac2005-06-02 16:48:05 -0700214 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215#define HH_DATA_ALIGN(__len) \
216 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
217 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
218};
219
220/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
221 * Alternative is:
222 * dev->hard_header_len ? (dev->hard_header_len +
223 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
224 *
225 * We could use other alignment values, but we must maintain the
226 * relationship HH alignment <= LL alignment.
227 */
228#define LL_RESERVED_SPACE(dev) \
229 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
230#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
231 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
232
233/* These flag bits are private to the generic network queueing
234 * layer, they may not be explicitly referenced by any other
235 * code.
236 */
237
238enum netdev_state_t
239{
240 __LINK_STATE_XOFF=0,
241 __LINK_STATE_START,
242 __LINK_STATE_PRESENT,
243 __LINK_STATE_SCHED,
244 __LINK_STATE_NOCARRIER,
245 __LINK_STATE_RX_SCHED,
Stefan Rompfb00055a2006-03-20 17:09:11 -0800246 __LINK_STATE_LINKWATCH_PENDING,
247 __LINK_STATE_DORMANT,
Herbert Xu48d83322006-06-19 23:57:59 -0700248 __LINK_STATE_QDISC_RUNNING,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249};
250
251
252/*
253 * This structure holds at boot time configured netdevice settings. They
254 * are then used in the device probing.
255 */
256struct netdev_boot_setup {
257 char name[IFNAMSIZ];
258 struct ifmap map;
259};
260#define NETDEV_BOOT_SETUP_MAX 8
261
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300262extern int __init netdev_boot_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264/*
265 * The DEVICE structure.
266 * Actually, this whole structure is a big mistake. It mixes I/O
267 * data with strictly "high-level" data, and it has to know about
268 * almost every data structure used in the INET module.
269 *
270 * FIXME: cleanup struct net_device such that network protocol info
271 * moves out.
272 */
273
274struct net_device
275{
276
277 /*
278 * This is the first field of the "visible" part of this structure
279 * (i.e. as seen by users in the "Space.c" file). It is the name
280 * the interface.
281 */
282 char name[IFNAMSIZ];
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700283 /* device name hash chain */
284 struct hlist_node name_hlist;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 /*
287 * I/O specific fields
288 * FIXME: Merge these and struct ifmap into one
289 */
290 unsigned long mem_end; /* shared mem end */
291 unsigned long mem_start; /* shared mem start */
292 unsigned long base_addr; /* device I/O address */
293 unsigned int irq; /* device IRQ number */
294
295 /*
296 * Some hardware also needs these fields, but they are not
297 * part of the usual set specified in Space.c.
298 */
299
300 unsigned char if_port; /* Selectable AUI, TP,..*/
301 unsigned char dma; /* DMA channel */
302
303 unsigned long state;
304
305 struct net_device *next;
306
307 /* The device initialization function. Called only once. */
308 int (*init)(struct net_device *dev);
309
310 /* ------- Fields preinitialized in Space.c finish here ------- */
311
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700312 /* Net device features */
313 unsigned long features;
314#define NETIF_F_SG 1 /* Scatter/gather IO. */
315#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
316#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
317#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
318#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
319#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
320#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
321#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
322#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
323#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
Herbert Xu37c31852006-06-22 03:07:29 -0700324#define NETIF_F_GSO 2048 /* Enable software GSO. */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700325#define NETIF_F_LLTX 4096 /* LockLess TX */
Rusty Russellc45d2862007-03-28 14:29:08 -0700326#define NETIF_F_INTERNAL_STATS 8192 /* Use stats structure in net_device */
Herbert Xu79671682006-06-22 02:40:14 -0700327
328 /* Segmentation offload features */
329#define NETIF_F_GSO_SHIFT 16
Herbert Xubcd76112006-06-30 13:36:35 -0700330#define NETIF_F_GSO_MASK 0xffff0000
Herbert Xu79671682006-06-22 02:40:14 -0700331#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700332#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
Herbert Xu576a30e2006-06-27 13:22:38 -0700333#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700334#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
335#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700336
Herbert Xu78eb8872006-08-17 18:22:32 -0700337 /* List of features with software fallbacks. */
338#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
339
Herbert Xu8648b302006-06-17 22:06:05 -0700340#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
341#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 struct net_device *next_sched;
344
345 /* Interface index. Unique device identifier */
346 int ifindex;
347 int iflink;
348
349
350 struct net_device_stats* (*get_stats)(struct net_device *dev);
Rusty Russellc45d2862007-03-28 14:29:08 -0700351 struct net_device_stats stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 /* List of functions to handle Wireless Extensions (instead of ioctl).
354 * See <net/iw_handler.h> for details. Jean II */
355 const struct iw_handler_def * wireless_handlers;
356 /* Instance data managed by the core of Wireless Extensions. */
357 struct iw_public_data * wireless_data;
358
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700359 const struct ethtool_ops *ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 /*
362 * This marks the end of the "visible" part of the structure. All
363 * fields hereafter are internal to the system, and may change at
364 * will (read: may be cleaned up at will).
365 */
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
Stefan Rompfb00055a2006-03-20 17:09:11 -0800368 unsigned int flags; /* interface flags (a la BSD) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 unsigned short gflags;
370 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
371 unsigned short padded; /* How much padding added by alloc_netdev() */
372
Stefan Rompfb00055a2006-03-20 17:09:11 -0800373 unsigned char operstate; /* RFC2863 operstate */
374 unsigned char link_mode; /* mapping policy to operstate */
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 unsigned mtu; /* interface MTU value */
377 unsigned short type; /* interface hardware type */
378 unsigned short hard_header_len; /* hardware hdr length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
380 struct net_device *master; /* Pointer to master device of a group,
381 * which this device is member of.
382 */
383
384 /* Interface address info. */
Jon Wetzela6f9a702005-08-20 17:15:54 -0700385 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 unsigned char addr_len; /* hardware address length */
387 unsigned short dev_id; /* for shared network cards */
388
389 struct dev_mc_list *mc_list; /* Multicast mac addresses */
390 int mc_count; /* Number of installed mcasts */
391 int promiscuity;
392 int allmulti;
393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394
395 /* Protocol specific pointers */
396
397 void *atalk_ptr; /* AppleTalk link */
398 void *ip_ptr; /* IPv4 specific data */
399 void *dn_ptr; /* DECnet specific data */
400 void *ip6_ptr; /* IPv6 specific data */
401 void *ec_ptr; /* Econet specific data */
402 void *ax25_ptr; /* AX.25 specific data */
403
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700404/*
405 * Cache line mostly used on receive path (including eth_type_trans())
406 */
407 struct list_head poll_list ____cacheline_aligned_in_smp;
408 /* Link to poll list */
409
410 int (*poll) (struct net_device *dev, int *quota);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 int quota;
412 int weight;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700413 unsigned long last_rx; /* Time of last Rx */
414 /* Interface address info used in eth_type_trans() */
415 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
416 because most packets are unicast) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700418 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
419
420/*
421 * Cache line mostly used on queue transmit path (qdisc)
422 */
423 /* device queue lock */
424 spinlock_t queue_lock ____cacheline_aligned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 struct Qdisc *qdisc;
426 struct Qdisc *qdisc_sleeping;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 struct list_head qdisc_list;
428 unsigned long tx_queue_len; /* Max frames per queue allowed */
429
Herbert Xuf6a78bf2006-06-22 02:57:17 -0700430 /* Partially transmitted GSO packet. */
431 struct sk_buff *gso_skb;
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 /* ingress path synchronizer */
434 spinlock_t ingress_lock;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700435 struct Qdisc *qdisc_ingress;
436
437/*
438 * One part is mostly used on xmit path (device)
439 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 /* hard_start_xmit synchronizer */
Herbert Xu932ff272006-06-09 12:20:56 -0700441 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 /* cpu id of processor entered to hard_start_xmit or -1,
443 if nobody entered there.
444 */
445 int xmit_lock_owner;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700446 void *priv; /* pointer to private data */
447 int (*hard_start_xmit) (struct sk_buff *skb,
448 struct net_device *dev);
449 /* These may be needed for future network-power-down code. */
450 unsigned long trans_start; /* Time (in jiffies) of last Tx */
451
452 int watchdog_timeo; /* used by dev_watchdog() */
453 struct timer_list watchdog_timer;
454
455/*
456 * refcnt is a very hot point, so align it on SMP
457 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 /* Number of references to this device */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700459 atomic_t refcnt ____cacheline_aligned_in_smp;
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 /* delayed register/unregister */
462 struct list_head todo_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 /* device index hash chain */
464 struct hlist_node index_hlist;
465
466 /* register/unregister state machine */
467 enum { NETREG_UNINITIALIZED=0,
Stephen Hemmingerb17a7c12006-05-10 13:21:17 -0700468 NETREG_REGISTERED, /* completed register_netdevice */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 NETREG_UNREGISTERING, /* called unregister_netdevice */
470 NETREG_UNREGISTERED, /* completed unregister todo */
471 NETREG_RELEASED, /* called free_netdev */
472 } reg_state;
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /* Called after device is detached from network. */
475 void (*uninit)(struct net_device *dev);
476 /* Called after last user reference disappears. */
477 void (*destructor)(struct net_device *dev);
478
479 /* Pointers to interface service routines. */
480 int (*open)(struct net_device *dev);
481 int (*stop)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482#define HAVE_NETDEV_POLL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 int (*hard_header) (struct sk_buff *skb,
484 struct net_device *dev,
485 unsigned short type,
486 void *daddr,
487 void *saddr,
488 unsigned len);
489 int (*rebuild_header)(struct sk_buff *skb);
490#define HAVE_MULTICAST
491 void (*set_multicast_list)(struct net_device *dev);
492#define HAVE_SET_MAC_ADDR
493 int (*set_mac_address)(struct net_device *dev,
494 void *addr);
495#define HAVE_PRIVATE_IOCTL
496 int (*do_ioctl)(struct net_device *dev,
497 struct ifreq *ifr, int cmd);
498#define HAVE_SET_CONFIG
499 int (*set_config)(struct net_device *dev,
500 struct ifmap *map);
501#define HAVE_HEADER_CACHE
502 int (*hard_header_cache)(struct neighbour *neigh,
503 struct hh_cache *hh);
504 void (*header_cache_update)(struct hh_cache *hh,
505 struct net_device *dev,
506 unsigned char * haddr);
507#define HAVE_CHANGE_MTU
508 int (*change_mtu)(struct net_device *dev, int new_mtu);
509
510#define HAVE_TX_TIMEOUT
511 void (*tx_timeout) (struct net_device *dev);
512
513 void (*vlan_rx_register)(struct net_device *dev,
514 struct vlan_group *grp);
515 void (*vlan_rx_add_vid)(struct net_device *dev,
516 unsigned short vid);
517 void (*vlan_rx_kill_vid)(struct net_device *dev,
518 unsigned short vid);
519
520 int (*hard_header_parse)(struct sk_buff *skb,
521 unsigned char *haddr);
522 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
523#ifdef CONFIG_NETPOLL
Jeff Moyer115c1d62005-06-22 22:05:31 -0700524 struct netpoll_info *npinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525#endif
526#ifdef CONFIG_NET_POLL_CONTROLLER
527 void (*poll_controller)(struct net_device *dev);
528#endif
529
530 /* bridge stuff */
531 struct net_bridge_port *br_port;
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 /* class/net/name entry */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700534 struct device dev;
Stephen Hemmingerfe9925b2006-05-06 17:56:03 -0700535 /* space for optional statistics and wireless sysfs groups */
536 struct attribute_group *sysfs_groups[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537};
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700538#define to_net_dev(d) container_of(d, struct net_device, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
540#define NETDEV_ALIGN 32
541#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
542
543static inline void *netdev_priv(struct net_device *dev)
544{
545 return (char *)dev + ((sizeof(struct net_device)
546 + NETDEV_ALIGN_CONST)
547 & ~NETDEV_ALIGN_CONST);
548}
549
550#define SET_MODULE_OWNER(dev) do { } while (0)
551/* Set the sysfs physical device reference for the network logical device
552 * if set prior to registration will cause a symlink during initialization.
553 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -0700554#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556struct packet_type {
David S. Millerf2ccd8f2005-08-09 19:34:12 -0700557 __be16 type; /* This is really htons(ether_type). */
558 struct net_device *dev; /* NULL is wildcarded here */
559 int (*func) (struct sk_buff *,
560 struct net_device *,
561 struct packet_type *,
562 struct net_device *);
Herbert Xu576a30e2006-06-27 13:22:38 -0700563 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
564 int features);
Herbert Xua430a432006-07-08 13:34:56 -0700565 int (*gso_send_check)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 void *af_packet_priv;
567 struct list_head list;
568};
569
570#include <linux/interrupt.h>
571#include <linux/notifier.h>
572
573extern struct net_device loopback_dev; /* The loopback */
574extern struct net_device *dev_base; /* All devices */
575extern rwlock_t dev_base_lock; /* Device list lock */
576
577extern int netdev_boot_setup_check(struct net_device *dev);
578extern unsigned long netdev_boot_base(const char *prefix, int unit);
579extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
580extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
581extern void dev_add_pack(struct packet_type *pt);
582extern void dev_remove_pack(struct packet_type *pt);
583extern void __dev_remove_pack(struct packet_type *pt);
584
585extern struct net_device *dev_get_by_flags(unsigned short flags,
586 unsigned short mask);
587extern struct net_device *dev_get_by_name(const char *name);
588extern struct net_device *__dev_get_by_name(const char *name);
589extern int dev_alloc_name(struct net_device *dev, const char *name);
590extern int dev_open(struct net_device *dev);
591extern int dev_close(struct net_device *dev);
592extern int dev_queue_xmit(struct sk_buff *skb);
593extern int register_netdevice(struct net_device *dev);
Stephen Hemminger22f8cde2007-02-07 00:09:58 -0800594extern void unregister_netdevice(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595extern void free_netdev(struct net_device *dev);
596extern void synchronize_net(void);
597extern int register_netdevice_notifier(struct notifier_block *nb);
598extern int unregister_netdevice_notifier(struct notifier_block *nb);
599extern int call_netdevice_notifiers(unsigned long val, void *v);
600extern struct net_device *dev_get_by_index(int ifindex);
601extern struct net_device *__dev_get_by_index(int ifindex);
602extern int dev_restart(struct net_device *dev);
603#ifdef CONFIG_NETPOLL_TRAP
604extern int netpoll_trap(void);
605#endif
606
607typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
608extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
609static inline int unregister_gifconf(unsigned int family)
610{
611 return register_gifconf(family, NULL);
612}
613
614/*
615 * Incoming packets are placed on per-cpu queues so that
616 * no locking is needed.
617 */
618
619struct softnet_data
620{
Stephen Hemminger31aa02c2005-06-23 20:12:48 -0700621 struct net_device *output_queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 struct sk_buff_head input_pkt_queue;
623 struct list_head poll_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 struct sk_buff *completion_queue;
625
626 struct net_device backlog_dev; /* Sorry. 8) */
Chris Leechdb217332006-06-17 21:24:58 -0700627#ifdef CONFIG_NET_DMA
628 struct dma_chan *net_dma;
629#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630};
631
632DECLARE_PER_CPU(struct softnet_data,softnet_data);
633
634#define HAVE_NETIF_QUEUE
635
Denis Vlasenko56079432006-03-29 15:57:29 -0800636extern void __netif_schedule(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638static inline void netif_schedule(struct net_device *dev)
639{
640 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
641 __netif_schedule(dev);
642}
643
644static inline void netif_start_queue(struct net_device *dev)
645{
646 clear_bit(__LINK_STATE_XOFF, &dev->state);
647}
648
649static inline void netif_wake_queue(struct net_device *dev)
650{
651#ifdef CONFIG_NETPOLL_TRAP
652 if (netpoll_trap())
653 return;
654#endif
655 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
656 __netif_schedule(dev);
657}
658
659static inline void netif_stop_queue(struct net_device *dev)
660{
661#ifdef CONFIG_NETPOLL_TRAP
662 if (netpoll_trap())
663 return;
664#endif
665 set_bit(__LINK_STATE_XOFF, &dev->state);
666}
667
668static inline int netif_queue_stopped(const struct net_device *dev)
669{
670 return test_bit(__LINK_STATE_XOFF, &dev->state);
671}
672
673static inline int netif_running(const struct net_device *dev)
674{
675 return test_bit(__LINK_STATE_START, &dev->state);
676}
677
678
679/* Use this variant when it is known for sure that it
680 * is executing from interrupt context.
681 */
682static inline void dev_kfree_skb_irq(struct sk_buff *skb)
683{
684 if (atomic_dec_and_test(&skb->users)) {
685 struct softnet_data *sd;
686 unsigned long flags;
687
688 local_irq_save(flags);
689 sd = &__get_cpu_var(softnet_data);
690 skb->next = sd->completion_queue;
691 sd->completion_queue = skb;
692 raise_softirq_irqoff(NET_TX_SOFTIRQ);
693 local_irq_restore(flags);
694 }
695}
696
697/* Use this variant in places where it could be invoked
698 * either from interrupt or non-interrupt context.
699 */
Denis Vlasenko56079432006-03-29 15:57:29 -0800700extern void dev_kfree_skb_any(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702#define HAVE_NETIF_RX 1
703extern int netif_rx(struct sk_buff *skb);
704extern int netif_rx_ni(struct sk_buff *skb);
705#define HAVE_NETIF_RECEIVE_SKB 1
706extern int netif_receive_skb(struct sk_buff *skb);
Mitch Williamsc2373ee2005-11-09 10:34:45 -0800707extern int dev_valid_name(const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708extern int dev_ioctl(unsigned int cmd, void __user *);
709extern int dev_ethtool(struct ifreq *);
710extern unsigned dev_get_flags(const struct net_device *);
711extern int dev_change_flags(struct net_device *, unsigned);
712extern int dev_change_name(struct net_device *, char *);
713extern int dev_set_mtu(struct net_device *, int);
714extern int dev_set_mac_address(struct net_device *,
715 struct sockaddr *);
Herbert Xuf6a78bf2006-06-22 02:57:17 -0700716extern int dev_hard_start_xmit(struct sk_buff *skb,
717 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719extern void dev_init(void);
720
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300721extern int netdev_budget;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
723/* Called by rtnetlink.c:rtnl_unlock() */
724extern void netdev_run_todo(void);
725
726static inline void dev_put(struct net_device *dev)
727{
728 atomic_dec(&dev->refcnt);
729}
730
Stephen Hemminger15333062006-03-20 22:32:28 -0800731static inline void dev_hold(struct net_device *dev)
732{
733 atomic_inc(&dev->refcnt);
734}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735
736/* Carrier loss detection, dial on demand. The functions netif_carrier_on
737 * and _off may be called from IRQ context, but it is caller
738 * who is responsible for serialization of these calls.
Stefan Rompfb00055a2006-03-20 17:09:11 -0800739 *
740 * The name carrier is inappropriate, these functions should really be
741 * called netif_lowerlayer_*() because they represent the state of any
742 * kind of lower layer not just hardware media.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 */
744
745extern void linkwatch_fire_event(struct net_device *dev);
746
747static inline int netif_carrier_ok(const struct net_device *dev)
748{
749 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
750}
751
752extern void __netdev_watchdog_up(struct net_device *dev);
753
Denis Vlasenko0a242ef2005-08-11 15:32:53 -0700754extern void netif_carrier_on(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755
Denis Vlasenko0a242ef2005-08-11 15:32:53 -0700756extern void netif_carrier_off(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Stefan Rompfb00055a2006-03-20 17:09:11 -0800758static inline void netif_dormant_on(struct net_device *dev)
759{
760 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
761 linkwatch_fire_event(dev);
762}
763
764static inline void netif_dormant_off(struct net_device *dev)
765{
766 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
767 linkwatch_fire_event(dev);
768}
769
770static inline int netif_dormant(const struct net_device *dev)
771{
772 return test_bit(__LINK_STATE_DORMANT, &dev->state);
773}
774
775
776static inline int netif_oper_up(const struct net_device *dev) {
777 return (dev->operstate == IF_OPER_UP ||
778 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
779}
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781/* Hot-plugging. */
782static inline int netif_device_present(struct net_device *dev)
783{
784 return test_bit(__LINK_STATE_PRESENT, &dev->state);
785}
786
Denis Vlasenko56079432006-03-29 15:57:29 -0800787extern void netif_device_detach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Denis Vlasenko56079432006-03-29 15:57:29 -0800789extern void netif_device_attach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
791/*
792 * Network interface message level settings
793 */
794#define HAVE_NETIF_MSG 1
795
796enum {
797 NETIF_MSG_DRV = 0x0001,
798 NETIF_MSG_PROBE = 0x0002,
799 NETIF_MSG_LINK = 0x0004,
800 NETIF_MSG_TIMER = 0x0008,
801 NETIF_MSG_IFDOWN = 0x0010,
802 NETIF_MSG_IFUP = 0x0020,
803 NETIF_MSG_RX_ERR = 0x0040,
804 NETIF_MSG_TX_ERR = 0x0080,
805 NETIF_MSG_TX_QUEUED = 0x0100,
806 NETIF_MSG_INTR = 0x0200,
807 NETIF_MSG_TX_DONE = 0x0400,
808 NETIF_MSG_RX_STATUS = 0x0800,
809 NETIF_MSG_PKTDATA = 0x1000,
810 NETIF_MSG_HW = 0x2000,
811 NETIF_MSG_WOL = 0x4000,
812};
813
814#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
815#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
816#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
817#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
818#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
819#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
820#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
821#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
822#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
823#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
824#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
825#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
826#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
827#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
828#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
829
830static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
831{
832 /* use default */
833 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
834 return default_msg_enable_bits;
835 if (debug_value == 0) /* no output */
836 return 0;
837 /* set low N bits */
838 return (1 << debug_value) - 1;
839}
840
shemminger@osdl.org0a122572005-11-30 11:45:17 -0800841/* Test if receive needs to be scheduled */
842static inline int __netif_rx_schedule_prep(struct net_device *dev)
Stephen Hemminger793b8832005-09-14 16:06:14 -0700843{
844 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
845}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
shemminger@osdl.org0a122572005-11-30 11:45:17 -0800847/* Test if receive needs to be scheduled but only if up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848static inline int netif_rx_schedule_prep(struct net_device *dev)
849{
shemminger@osdl.org0a122572005-11-30 11:45:17 -0800850 return netif_running(dev) && __netif_rx_schedule_prep(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851}
852
853/* Add interface to tail of rx poll list. This assumes that _prep has
854 * already been called and returned 1.
855 */
856
Denis Vlasenko56079432006-03-29 15:57:29 -0800857extern void __netif_rx_schedule(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
859/* Try to reschedule poll. Called by irq handler. */
860
861static inline void netif_rx_schedule(struct net_device *dev)
862{
863 if (netif_rx_schedule_prep(dev))
864 __netif_rx_schedule(dev);
865}
866
Stephen Hemmingerd3240312006-05-08 15:11:26 -0700867/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
868 * Do not inline this?
869 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870static inline int netif_rx_reschedule(struct net_device *dev, int undo)
871{
872 if (netif_rx_schedule_prep(dev)) {
873 unsigned long flags;
Stephen Hemmingerd3240312006-05-08 15:11:26 -0700874
875 dev->quota += undo;
876
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 local_irq_save(flags);
Stephen Hemmingerd3240312006-05-08 15:11:26 -0700878 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
879 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 local_irq_restore(flags);
881 return 1;
882 }
883 return 0;
884}
885
886/* Remove interface from poll list: it must be in the poll list
887 * on current cpu. This primitive is called by dev->poll(), when
888 * it completes the work. The device cannot be out of poll list at this
889 * moment, it is BUG().
890 */
891static inline void netif_rx_complete(struct net_device *dev)
892{
893 unsigned long flags;
894
895 local_irq_save(flags);
896 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
897 list_del(&dev->poll_list);
898 smp_mb__before_clear_bit();
899 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
900 local_irq_restore(flags);
901}
902
903static inline void netif_poll_disable(struct net_device *dev)
904{
Nishanth Aravamudan3173c892005-09-11 02:09:55 -0700905 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 /* No hurry. */
Nishanth Aravamudan3173c892005-09-11 02:09:55 -0700907 schedule_timeout_interruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908}
909
910static inline void netif_poll_enable(struct net_device *dev)
911{
David S. Millere44c39b2006-12-28 21:14:52 -0800912 smp_mb__before_clear_bit();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
914}
915
916/* same as netif_rx_complete, except that local_irq_save(flags)
917 * has already been issued
918 */
919static inline void __netif_rx_complete(struct net_device *dev)
920{
921 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
922 list_del(&dev->poll_list);
923 smp_mb__before_clear_bit();
924 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
925}
926
Herbert Xu932ff272006-06-09 12:20:56 -0700927static inline void netif_tx_lock(struct net_device *dev)
928{
929 spin_lock(&dev->_xmit_lock);
930 dev->xmit_lock_owner = smp_processor_id();
931}
932
933static inline void netif_tx_lock_bh(struct net_device *dev)
934{
935 spin_lock_bh(&dev->_xmit_lock);
936 dev->xmit_lock_owner = smp_processor_id();
937}
938
939static inline int netif_tx_trylock(struct net_device *dev)
940{
Herbert Xu53c4b2c2006-07-21 14:55:38 -0700941 int ok = spin_trylock(&dev->_xmit_lock);
942 if (likely(ok))
Herbert Xu932ff272006-06-09 12:20:56 -0700943 dev->xmit_lock_owner = smp_processor_id();
Herbert Xu53c4b2c2006-07-21 14:55:38 -0700944 return ok;
Herbert Xu932ff272006-06-09 12:20:56 -0700945}
946
947static inline void netif_tx_unlock(struct net_device *dev)
948{
949 dev->xmit_lock_owner = -1;
950 spin_unlock(&dev->_xmit_lock);
951}
952
953static inline void netif_tx_unlock_bh(struct net_device *dev)
954{
955 dev->xmit_lock_owner = -1;
956 spin_unlock_bh(&dev->_xmit_lock);
957}
958
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959static inline void netif_tx_disable(struct net_device *dev)
960{
Herbert Xu932ff272006-06-09 12:20:56 -0700961 netif_tx_lock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 netif_stop_queue(dev);
Herbert Xu932ff272006-06-09 12:20:56 -0700963 netif_tx_unlock_bh(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964}
965
966/* These functions live elsewhere (drivers/net/net_init.c, but related) */
967
968extern void ether_setup(struct net_device *dev);
969
970/* Support for loadable net-drivers */
971extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
972 void (*setup)(struct net_device *));
973extern int register_netdev(struct net_device *dev);
974extern void unregister_netdev(struct net_device *dev);
975/* Functions used for multicast support */
976extern void dev_mc_upload(struct net_device *dev);
977extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
978extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
979extern void dev_mc_discard(struct net_device *dev);
980extern void dev_set_promiscuity(struct net_device *dev, int inc);
981extern void dev_set_allmulti(struct net_device *dev, int inc);
982extern void netdev_state_change(struct net_device *dev);
Stephen Hemmingerd8a33ac2005-05-29 14:13:47 -0700983extern void netdev_features_change(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984/* Load a device via the kmod */
985extern void dev_load(const char *name);
986extern void dev_mcast_init(void);
987extern int netdev_max_backlog;
988extern int weight_p;
989extern int netdev_set_master(struct net_device *dev, struct net_device *master);
Patrick McHardy84fa7932006-08-29 16:44:56 -0700990extern int skb_checksum_help(struct sk_buff *skb);
Herbert Xu576a30e2006-06-27 13:22:38 -0700991extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
Herbert Xufb286bb2005-11-10 13:01:24 -0800992#ifdef CONFIG_BUG
993extern void netdev_rx_csum_fault(struct net_device *dev);
994#else
995static inline void netdev_rx_csum_fault(struct net_device *dev)
996{
997}
998#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999/* rx skb timestamps */
1000extern void net_enable_timestamp(void);
1001extern void net_disable_timestamp(void);
1002
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001003#ifdef CONFIG_PROC_FS
1004extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1005extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1006extern void dev_seq_stop(struct seq_file *seq, void *v);
1007#endif
1008
1009extern void linkwatch_run_queue(void);
1010
Herbert Xubcd76112006-06-30 13:36:35 -07001011static inline int net_gso_ok(int features, int gso_type)
1012{
1013 int feature = gso_type << NETIF_F_GSO_SHIFT;
1014 return (features & feature) == feature;
1015}
1016
Herbert Xu576a30e2006-06-27 13:22:38 -07001017static inline int skb_gso_ok(struct sk_buff *skb, int features)
1018{
Herbert Xua430a432006-07-08 13:34:56 -07001019 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
Herbert Xu576a30e2006-06-27 13:22:38 -07001020}
1021
Herbert Xu79671682006-06-22 02:40:14 -07001022static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1023{
Herbert Xua430a432006-07-08 13:34:56 -07001024 return skb_is_gso(skb) &&
1025 (!skb_gso_ok(skb, dev->features) ||
Patrick McHardy84fa7932006-08-29 16:44:56 -07001026 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
Herbert Xu79671682006-06-22 02:40:14 -07001027}
1028
David S. Miller7ea49ed2006-08-14 17:08:36 -07001029/* On bonding slaves other than the currently active slave, suppress
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001030 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1031 * ARP on active-backup slaves with arp_validate enabled.
David S. Miller7ea49ed2006-08-14 17:08:36 -07001032 */
1033static inline int skb_bond_should_drop(struct sk_buff *skb)
1034{
1035 struct net_device *dev = skb->dev;
1036 struct net_device *master = dev->master;
1037
1038 if (master &&
1039 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001040 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1041 skb->protocol == __constant_htons(ETH_P_ARP))
1042 return 0;
1043
David S. Miller7ea49ed2006-08-14 17:08:36 -07001044 if (master->priv_flags & IFF_MASTER_ALB) {
1045 if (skb->pkt_type != PACKET_BROADCAST &&
1046 skb->pkt_type != PACKET_MULTICAST)
1047 return 0;
1048 }
1049 if (master->priv_flags & IFF_MASTER_8023AD &&
1050 skb->protocol == __constant_htons(ETH_P_SLOW))
1051 return 0;
1052
1053 return 1;
1054 }
1055 return 0;
1056}
1057
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058#endif /* __KERNEL__ */
1059
1060#endif /* _LINUX_DEV_H */