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[net-next-2.6.git] / include / linux / netdevice.h
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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__
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;
704232c2
JB		 45/* 802.11 specific */
46struct wireless_dev;
1da177e4
LT		 47 /* source back-compat hooks */
48#define SET_ETHTOOL_OPS(netdev,ops) \
49 ( (netdev)->ethtool_ops = (ops) )
50
51#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
52 functions are available. */
53#define HAVE_FREE_NETDEV /* free_netdev() */
54#define HAVE_NETDEV_PRIV /* netdev_priv() */
55
56#define NET_XMIT_SUCCESS 0
57#define NET_XMIT_DROP 1 /* skb dropped */
58#define NET_XMIT_CN 2 /* congestion notification */
59#define NET_XMIT_POLICED 3 /* skb is shot by police */
60#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
61 (TC use only - dev_queue_xmit
62 returns this as NET_XMIT_SUCCESS) */
63
64/* Backlog congestion levels */
65#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
66#define NET_RX_DROP 1 /* packet dropped */
67#define NET_RX_CN_LOW 2 /* storm alert, just in case */
68#define NET_RX_CN_MOD 3 /* Storm on its way! */
69#define NET_RX_CN_HIGH 4 /* The storm is here */
70#define NET_RX_BAD 5 /* packet dropped due to kernel error */
71
b9df3cb8
GR		 72/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
73 * indicates that the device will soon be dropping packets, or already drops
74 * some packets of the same priority; prompting us to send less aggressively. */
75#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 76#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
77
78#endif
79
80#define MAX_ADDR_LEN 32 /* Largest hardware address length */
81
82/* Driver transmit return codes */
83#define NETDEV_TX_OK 0 /* driver took care of packet */
84#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
85#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
86
87/*
88 * Compute the worst case header length according to the protocols
89 * used.
90 */
91
92#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
93#define LL_MAX_HEADER 32
94#else
95#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
96#define LL_MAX_HEADER 96
97#else
98#define LL_MAX_HEADER 48
99#endif
100#endif
101
e81c7359
DM		 102#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
103 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
104 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
105 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 106#define MAX_HEADER LL_MAX_HEADER
107#else
108#define MAX_HEADER (LL_MAX_HEADER + 48)
109#endif
110
111/*
112 * Network device statistics. Akin to the 2.0 ether stats but
113 * with byte counters.
114 */
115
116struct net_device_stats
117{
118 unsigned long rx_packets; /* total packets received */
119 unsigned long tx_packets; /* total packets transmitted */
120 unsigned long rx_bytes; /* total bytes received */
121 unsigned long tx_bytes; /* total bytes transmitted */
122 unsigned long rx_errors; /* bad packets received */
123 unsigned long tx_errors; /* packet transmit problems */
124 unsigned long rx_dropped; /* no space in linux buffers */
125 unsigned long tx_dropped; /* no space available in linux */
126 unsigned long multicast; /* multicast packets received */
127 unsigned long collisions;
128
129 /* detailed rx_errors: */
130 unsigned long rx_length_errors;
131 unsigned long rx_over_errors; /* receiver ring buff overflow */
132 unsigned long rx_crc_errors; /* recved pkt with crc error */
133 unsigned long rx_frame_errors; /* recv'd frame alignment error */
134 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
135 unsigned long rx_missed_errors; /* receiver missed packet */
136
137 /* detailed tx_errors */
138 unsigned long tx_aborted_errors;
139 unsigned long tx_carrier_errors;
140 unsigned long tx_fifo_errors;
141 unsigned long tx_heartbeat_errors;
142 unsigned long tx_window_errors;
143
144 /* for cslip etc */
145 unsigned long rx_compressed;
146 unsigned long tx_compressed;
147};
148
149
150/* Media selection options. */
151enum {
152 IF_PORT_UNKNOWN = 0,
153 IF_PORT_10BASE2,
154 IF_PORT_10BASET,
155 IF_PORT_AUI,
156 IF_PORT_100BASET,
157 IF_PORT_100BASETX,
158 IF_PORT_100BASEFX
159};
160
161#ifdef __KERNEL__
162
163#include <linux/cache.h>
164#include <linux/skbuff.h>
165
166struct neighbour;
167struct neigh_parms;
168struct sk_buff;
169
170struct netif_rx_stats
171{
172 unsigned total;
173 unsigned dropped;
174 unsigned time_squeeze;
1da177e4
LT		 175 unsigned cpu_collision;
176};
177
178DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
179
180
181/*
182 * We tag multicasts with these structures.
183 */
184
185struct dev_mc_list
186{
187 struct dev_mc_list *next;
188 __u8 dmi_addr[MAX_ADDR_LEN];
189 unsigned char dmi_addrlen;
190 int dmi_users;
191 int dmi_gusers;
192};
193
194struct hh_cache
195{
196 struct hh_cache *hh_next; /* Next entry */
197 atomic_t hh_refcnt; /* number of users */
f0490980
ED		 198/*
199 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
200 * cache line on SMP.
201 * They are mostly read, but hh_refcnt may be changed quite frequently,
202 * incurring cache line ping pongs.
203 */
204 __be16 hh_type ____cacheline_aligned_in_smp;
205 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 206 * NOTE: For VLANs, this will be the
207 * encapuslated type. --BLG
208 */
d5c42c0e 209 u16 hh_len; /* length of header */
1da177e4 210 int (*hh_output)(struct sk_buff *skb);
3644f0ce 211 seqlock_t hh_lock;
1da177e4
LT		 212
213 /* cached hardware header; allow for machine alignment needs. */
214#define HH_DATA_MOD 16
215#define HH_DATA_OFF(__len) \
5ba0eac6 216 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 217#define HH_DATA_ALIGN(__len) \
218 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
219 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
220};
221
222/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
223 * Alternative is:
224 * dev->hard_header_len ? (dev->hard_header_len +
225 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
226 *
227 * We could use other alignment values, but we must maintain the
228 * relationship HH alignment <= LL alignment.
229 */
230#define LL_RESERVED_SPACE(dev) \
231 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
232#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
233 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
234
235/* These flag bits are private to the generic network queueing
236 * layer, they may not be explicitly referenced by any other
237 * code.
238 */
239
240enum netdev_state_t
241{
242 __LINK_STATE_XOFF=0,
243 __LINK_STATE_START,
244 __LINK_STATE_PRESENT,
245 __LINK_STATE_SCHED,
246 __LINK_STATE_NOCARRIER,
247 __LINK_STATE_RX_SCHED,
b00055aa
SR		 248 __LINK_STATE_LINKWATCH_PENDING,
249 __LINK_STATE_DORMANT,
48d83325 250 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 251};
252
253
254/*
255 * This structure holds at boot time configured netdevice settings. They
256 * are then used in the device probing.
257 */
258struct netdev_boot_setup {
259 char name[IFNAMSIZ];
260 struct ifmap map;
261};
262#define NETDEV_BOOT_SETUP_MAX 8
263
20380731 264extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 265
266/*
267 * The DEVICE structure.
268 * Actually, this whole structure is a big mistake. It mixes I/O
269 * data with strictly "high-level" data, and it has to know about
270 * almost every data structure used in the INET module.
271 *
272 * FIXME: cleanup struct net_device such that network protocol info
273 * moves out.
274 */
275
276struct net_device
277{
278
279 /*
280 * This is the first field of the "visible" part of this structure
281 * (i.e. as seen by users in the "Space.c" file). It is the name
282 * the interface.
283 */
284 char name[IFNAMSIZ];
9356b8fc
ED		 285 /* device name hash chain */
286 struct hlist_node name_hlist;
1da177e4
LT		 287
288 /*
289 * I/O specific fields
290 * FIXME: Merge these and struct ifmap into one
291 */
292 unsigned long mem_end; /* shared mem end */
293 unsigned long mem_start; /* shared mem start */
294 unsigned long base_addr; /* device I/O address */
295 unsigned int irq; /* device IRQ number */
296
297 /*
298 * Some hardware also needs these fields, but they are not
299 * part of the usual set specified in Space.c.
300 */
301
302 unsigned char if_port; /* Selectable AUI, TP,..*/
303 unsigned char dma; /* DMA channel */
304
305 unsigned long state;
306
7562f876 307 struct list_head dev_list;
1da177e4
LT		 308
309 /* The device initialization function. Called only once. */
310 int (*init)(struct net_device *dev);
311
312 /* ------- Fields preinitialized in Space.c finish here ------- */
313
9356b8fc
ED		 314 /* Net device features */
315 unsigned long features;
316#define NETIF_F_SG 1 /* Scatter/gather IO. */
317#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
318#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
319#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
320#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
321#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
322#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
323#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
324#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
325#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 326#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 327#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 328
329 /* Segmentation offload features */
330#define NETIF_F_GSO_SHIFT 16
bcd76111 331#define NETIF_F_GSO_MASK 0xffff0000
7967168c 332#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 333#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 334#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 335#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
336#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 337
78eb8877
HX		 338 /* List of features with software fallbacks. */
339#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
340
8648b305
HX		 341#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
342#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
343
1da177e4
LT		 344 struct net_device *next_sched;
345
346 /* Interface index. Unique device identifier */
347 int ifindex;
348 int iflink;
349
350
351 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 352 struct net_device_stats stats;
1da177e4 353
b86e0280 354#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT		 355 /* List of functions to handle Wireless Extensions (instead of ioctl).
356 * See <net/iw_handler.h> for details. Jean II */
357 const struct iw_handler_def * wireless_handlers;
358 /* Instance data managed by the core of Wireless Extensions. */
359 struct iw_public_data * wireless_data;
b86e0280 360#endif
76fd8593 361 const struct ethtool_ops *ethtool_ops;
1da177e4
LT		 362
363 /*
364 * This marks the end of the "visible" part of the structure. All
365 * fields hereafter are internal to the system, and may change at
366 * will (read: may be cleaned up at will).
367 */
368
1da177e4 369
b00055aa 370 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 371 unsigned short gflags;
372 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
373 unsigned short padded; /* How much padding added by alloc_netdev() */
374
b00055aa
SR		 375 unsigned char operstate; /* RFC2863 operstate */
376 unsigned char link_mode; /* mapping policy to operstate */
377
1da177e4
LT		 378 unsigned mtu; /* interface MTU value */
379 unsigned short type; /* interface hardware type */
380 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 381
382 struct net_device *master; /* Pointer to master device of a group,
383 * which this device is member of.
384 */
385
386 /* Interface address info. */
a6f9a705 387 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 388 unsigned char addr_len; /* hardware address length */
389 unsigned short dev_id; /* for shared network cards */
390
391 struct dev_mc_list *mc_list; /* Multicast mac addresses */
392 int mc_count; /* Number of installed mcasts */
393 int promiscuity;
394 int allmulti;
395
1da177e4
LT		 396
397 /* Protocol specific pointers */
398
399 void *atalk_ptr; /* AppleTalk link */
400 void *ip_ptr; /* IPv4 specific data */
401 void *dn_ptr; /* DECnet specific data */
402 void *ip6_ptr; /* IPv6 specific data */
403 void *ec_ptr; /* Econet specific data */
404 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB		 405 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
406 assign before registering */
1da177e4 407
9356b8fc
ED		 408/*
409 * Cache line mostly used on receive path (including eth_type_trans())
410 */
411 struct list_head poll_list ____cacheline_aligned_in_smp;
412 /* Link to poll list */
413
414 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 415 int quota;
416 int weight;
9356b8fc
ED		 417 unsigned long last_rx; /* Time of last Rx */
418 /* Interface address info used in eth_type_trans() */
419 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
420 because most packets are unicast) */
421
422 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 423
9356b8fc
ED		 424/*
425 * Cache line mostly used on queue transmit path (qdisc)
426 */
427 /* device queue lock */
428 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 429 struct Qdisc *qdisc;
430 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 431 struct list_head qdisc_list;
432 unsigned long tx_queue_len; /* Max frames per queue allowed */
433
f6a78bfc
HX		 434 /* Partially transmitted GSO packet. */
435 struct sk_buff *gso_skb;
436
1da177e4
LT		 437 /* ingress path synchronizer */
438 spinlock_t ingress_lock;
9356b8fc
ED		 439 struct Qdisc *qdisc_ingress;
440
441/*
442 * One part is mostly used on xmit path (device)
443 */
1da177e4 444 /* hard_start_xmit synchronizer */
932ff279 445 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 446 /* cpu id of processor entered to hard_start_xmit or -1,
447 if nobody entered there.
448 */
449 int xmit_lock_owner;
9356b8fc
ED		 450 void *priv; /* pointer to private data */
451 int (*hard_start_xmit) (struct sk_buff *skb,
452 struct net_device *dev);
453 /* These may be needed for future network-power-down code. */
454 unsigned long trans_start; /* Time (in jiffies) of last Tx */
455
456 int watchdog_timeo; /* used by dev_watchdog() */
457 struct timer_list watchdog_timer;
458
459/*
460 * refcnt is a very hot point, so align it on SMP
461 */
1da177e4 462 /* Number of references to this device */
9356b8fc
ED		 463 atomic_t refcnt ____cacheline_aligned_in_smp;
464
1da177e4
LT		 465 /* delayed register/unregister */
466 struct list_head todo_list;
1da177e4
LT		 467 /* device index hash chain */
468 struct hlist_node index_hlist;
469
572a103d
HX		 470 struct net_device *link_watch_next;
471
1da177e4
LT		 472 /* register/unregister state machine */
473 enum { NETREG_UNINITIALIZED=0,
b17a7c17 474 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 475 NETREG_UNREGISTERING, /* called unregister_netdevice */
476 NETREG_UNREGISTERED, /* completed unregister todo */
477 NETREG_RELEASED, /* called free_netdev */
478 } reg_state;
479
1da177e4
LT		 480 /* Called after device is detached from network. */
481 void (*uninit)(struct net_device *dev);
482 /* Called after last user reference disappears. */
483 void (*destructor)(struct net_device *dev);
484
485 /* Pointers to interface service routines. */
486 int (*open)(struct net_device *dev);
487 int (*stop)(struct net_device *dev);
1da177e4 488#define HAVE_NETDEV_POLL
1da177e4
LT		 489 int (*hard_header) (struct sk_buff *skb,
490 struct net_device *dev,
491 unsigned short type,
492 void *daddr,
493 void *saddr,
494 unsigned len);
495 int (*rebuild_header)(struct sk_buff *skb);
496#define HAVE_MULTICAST
497 void (*set_multicast_list)(struct net_device *dev);
498#define HAVE_SET_MAC_ADDR
499 int (*set_mac_address)(struct net_device *dev,
500 void *addr);
501#define HAVE_PRIVATE_IOCTL
502 int (*do_ioctl)(struct net_device *dev,
503 struct ifreq *ifr, int cmd);
504#define HAVE_SET_CONFIG
505 int (*set_config)(struct net_device *dev,
506 struct ifmap *map);
507#define HAVE_HEADER_CACHE
508 int (*hard_header_cache)(struct neighbour *neigh,
509 struct hh_cache *hh);
510 void (*header_cache_update)(struct hh_cache *hh,
511 struct net_device *dev,
512 unsigned char * haddr);
513#define HAVE_CHANGE_MTU
514 int (*change_mtu)(struct net_device *dev, int new_mtu);
515
516#define HAVE_TX_TIMEOUT
517 void (*tx_timeout) (struct net_device *dev);
518
519 void (*vlan_rx_register)(struct net_device *dev,
520 struct vlan_group *grp);
521 void (*vlan_rx_add_vid)(struct net_device *dev,
522 unsigned short vid);
523 void (*vlan_rx_kill_vid)(struct net_device *dev,
524 unsigned short vid);
525
526 int (*hard_header_parse)(struct sk_buff *skb,
527 unsigned char *haddr);
528 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
529#ifdef CONFIG_NETPOLL
115c1d6e 530 struct netpoll_info *npinfo;
1da177e4
LT		 531#endif
532#ifdef CONFIG_NET_POLL_CONTROLLER
533 void (*poll_controller)(struct net_device *dev);
534#endif
535
536 /* bridge stuff */
537 struct net_bridge_port *br_port;
538
1da177e4 539 /* class/net/name entry */
43cb76d9 540 struct device dev;
fe9925b5
SH		 541 /* space for optional statistics and wireless sysfs groups */
542 struct attribute_group *sysfs_groups[3];
38f7b870
PM		 543
544 /* rtnetlink link ops */
545 const struct rtnl_link_ops *rtnl_link_ops;
1da177e4 546};
43cb76d9 547#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 548
549#define NETDEV_ALIGN 32
550#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
551
6472ce60 552static inline void *netdev_priv(const struct net_device *dev)
1da177e4
LT		 553{
554 return (char *)dev + ((sizeof(struct net_device)
555 + NETDEV_ALIGN_CONST)
556 & ~NETDEV_ALIGN_CONST);
557}
558
559#define SET_MODULE_OWNER(dev) do { } while (0)
560/* Set the sysfs physical device reference for the network logical device
561 * if set prior to registration will cause a symlink during initialization.
562 */
43cb76d9 563#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4
LT		 564
565struct packet_type {
f2ccd8fa
DM		 566 __be16 type; /* This is really htons(ether_type). */
567 struct net_device *dev; /* NULL is wildcarded here */
568 int (*func) (struct sk_buff *,
569 struct net_device *,
570 struct packet_type *,
571 struct net_device *);
576a30eb
HX		 572 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
573 int features);
a430a43d 574 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 575 void *af_packet_priv;
576 struct list_head list;
577};
578
579#include <linux/interrupt.h>
580#include <linux/notifier.h>
581
582extern struct net_device loopback_dev; /* The loopback */
7562f876 583extern struct list_head dev_base_head; /* All devices */
1da177e4
LT		 584extern rwlock_t dev_base_lock; /* Device list lock */
585
7562f876
PE		 586#define for_each_netdev(d) \
587 list_for_each_entry(d, &dev_base_head, dev_list)
588#define for_each_netdev_safe(d, n) \
589 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
590#define for_each_netdev_continue(d) \
591 list_for_each_entry_continue(d, &dev_base_head, dev_list)
592#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
593
594static inline struct net_device *next_net_device(struct net_device *dev)
595{
596 struct list_head *lh;
597
598 lh = dev->dev_list.next;
599 return lh == &dev_base_head ? NULL : net_device_entry(lh);
600}
601
602static inline struct net_device *first_net_device(void)
603{
604 return list_empty(&dev_base_head) ? NULL :
605 net_device_entry(dev_base_head.next);
606}
607
1da177e4
LT		 608extern int netdev_boot_setup_check(struct net_device *dev);
609extern unsigned long netdev_boot_base(const char *prefix, int unit);
610extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
611extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
4e9cac2b 612extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
1da177e4
LT		 613extern void dev_add_pack(struct packet_type *pt);
614extern void dev_remove_pack(struct packet_type *pt);
615extern void __dev_remove_pack(struct packet_type *pt);
616
617extern struct net_device *dev_get_by_flags(unsigned short flags,
618 unsigned short mask);
619extern struct net_device *dev_get_by_name(const char *name);
620extern struct net_device *__dev_get_by_name(const char *name);
621extern int dev_alloc_name(struct net_device *dev, const char *name);
622extern int dev_open(struct net_device *dev);
623extern int dev_close(struct net_device *dev);
624extern int dev_queue_xmit(struct sk_buff *skb);
625extern int register_netdevice(struct net_device *dev);
22f8cde5 626extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 627extern void free_netdev(struct net_device *dev);
628extern void synchronize_net(void);
629extern int register_netdevice_notifier(struct notifier_block *nb);
630extern int unregister_netdevice_notifier(struct notifier_block *nb);
631extern int call_netdevice_notifiers(unsigned long val, void *v);
632extern struct net_device *dev_get_by_index(int ifindex);
633extern struct net_device *__dev_get_by_index(int ifindex);
634extern int dev_restart(struct net_device *dev);
635#ifdef CONFIG_NETPOLL_TRAP
636extern int netpoll_trap(void);
637#endif
638
639typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
640extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
641static inline int unregister_gifconf(unsigned int family)
642{
643 return register_gifconf(family, NULL);
644}
645
646/*
647 * Incoming packets are placed on per-cpu queues so that
648 * no locking is needed.
649 */
650
651struct softnet_data
652{
31aa02c5 653 struct net_device *output_queue;
1da177e4
LT		 654 struct sk_buff_head input_pkt_queue;
655 struct list_head poll_list;
1da177e4
LT		 656 struct sk_buff *completion_queue;
657
658 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 659#ifdef CONFIG_NET_DMA
660 struct dma_chan *net_dma;
661#endif
1da177e4
LT		 662};
663
664DECLARE_PER_CPU(struct softnet_data,softnet_data);
665
666#define HAVE_NETIF_QUEUE
667
56079431 668extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 669
670static inline void netif_schedule(struct net_device *dev)
671{
672 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
673 __netif_schedule(dev);
674}
675
676static inline void netif_start_queue(struct net_device *dev)
677{
678 clear_bit(__LINK_STATE_XOFF, &dev->state);
679}
680
681static inline void netif_wake_queue(struct net_device *dev)
682{
683#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS		 684 if (netpoll_trap()) {
685 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 686 return;
5f286e11 687 }
1da177e4
LT		 688#endif
689 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
690 __netif_schedule(dev);
691}
692
693static inline void netif_stop_queue(struct net_device *dev)
694{
1da177e4
LT		 695 set_bit(__LINK_STATE_XOFF, &dev->state);
696}
697
698static inline int netif_queue_stopped(const struct net_device *dev)
699{
700 return test_bit(__LINK_STATE_XOFF, &dev->state);
701}
702
703static inline int netif_running(const struct net_device *dev)
704{
705 return test_bit(__LINK_STATE_START, &dev->state);
706}
707
708
709/* Use this variant when it is known for sure that it
710 * is executing from interrupt context.
711 */
712static inline void dev_kfree_skb_irq(struct sk_buff *skb)
713{
714 if (atomic_dec_and_test(&skb->users)) {
715 struct softnet_data *sd;
716 unsigned long flags;
717
718 local_irq_save(flags);
719 sd = &__get_cpu_var(softnet_data);
720 skb->next = sd->completion_queue;
721 sd->completion_queue = skb;
722 raise_softirq_irqoff(NET_TX_SOFTIRQ);
723 local_irq_restore(flags);
724 }
725}
726
727/* Use this variant in places where it could be invoked
728 * either from interrupt or non-interrupt context.
729 */
56079431 730extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 731
732#define HAVE_NETIF_RX 1
733extern int netif_rx(struct sk_buff *skb);
734extern int netif_rx_ni(struct sk_buff *skb);
735#define HAVE_NETIF_RECEIVE_SKB 1
736extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 737extern int dev_valid_name(const char *name);
1da177e4
LT		 738extern int dev_ioctl(unsigned int cmd, void __user *);
739extern int dev_ethtool(struct ifreq *);
740extern unsigned dev_get_flags(const struct net_device *);
741extern int dev_change_flags(struct net_device *, unsigned);
742extern int dev_change_name(struct net_device *, char *);
743extern int dev_set_mtu(struct net_device *, int);
744extern int dev_set_mac_address(struct net_device *,
745 struct sockaddr *);
f6a78bfc
HX		 746extern int dev_hard_start_xmit(struct sk_buff *skb,
747 struct net_device *dev);
1da177e4
LT		 748
749extern void dev_init(void);
750
20380731 751extern int netdev_budget;
1da177e4
LT		 752
753/* Called by rtnetlink.c:rtnl_unlock() */
754extern void netdev_run_todo(void);
755
756static inline void dev_put(struct net_device *dev)
757{
758 atomic_dec(&dev->refcnt);
759}
760
15333061
SH		 761static inline void dev_hold(struct net_device *dev)
762{
763 atomic_inc(&dev->refcnt);
764}
1da177e4
LT		 765
766/* Carrier loss detection, dial on demand. The functions netif_carrier_on
767 * and _off may be called from IRQ context, but it is caller
768 * who is responsible for serialization of these calls.
b00055aa
SR		 769 *
770 * The name carrier is inappropriate, these functions should really be
771 * called netif_lowerlayer_*() because they represent the state of any
772 * kind of lower layer not just hardware media.
1da177e4
LT		 773 */
774
775extern void linkwatch_fire_event(struct net_device *dev);
776
777static inline int netif_carrier_ok(const struct net_device *dev)
778{
779 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
780}
781
782extern void __netdev_watchdog_up(struct net_device *dev);
783
0a242efc 784extern void netif_carrier_on(struct net_device *dev);
1da177e4 785
0a242efc 786extern void netif_carrier_off(struct net_device *dev);
1da177e4 787
b00055aa
SR		 788static inline void netif_dormant_on(struct net_device *dev)
789{
790 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
791 linkwatch_fire_event(dev);
792}
793
794static inline void netif_dormant_off(struct net_device *dev)
795{
796 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
797 linkwatch_fire_event(dev);
798}
799
800static inline int netif_dormant(const struct net_device *dev)
801{
802 return test_bit(__LINK_STATE_DORMANT, &dev->state);
803}
804
805
806static inline int netif_oper_up(const struct net_device *dev) {
807 return (dev->operstate == IF_OPER_UP ||
808 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
809}
810
1da177e4
LT		 811/* Hot-plugging. */
812static inline int netif_device_present(struct net_device *dev)
813{
814 return test_bit(__LINK_STATE_PRESENT, &dev->state);
815}
816
56079431 817extern void netif_device_detach(struct net_device *dev);
1da177e4 818
56079431 819extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 820
821/*
822 * Network interface message level settings
823 */
824#define HAVE_NETIF_MSG 1
825
826enum {
827 NETIF_MSG_DRV = 0x0001,
828 NETIF_MSG_PROBE = 0x0002,
829 NETIF_MSG_LINK = 0x0004,
830 NETIF_MSG_TIMER = 0x0008,
831 NETIF_MSG_IFDOWN = 0x0010,
832 NETIF_MSG_IFUP = 0x0020,
833 NETIF_MSG_RX_ERR = 0x0040,
834 NETIF_MSG_TX_ERR = 0x0080,
835 NETIF_MSG_TX_QUEUED = 0x0100,
836 NETIF_MSG_INTR = 0x0200,
837 NETIF_MSG_TX_DONE = 0x0400,
838 NETIF_MSG_RX_STATUS = 0x0800,
839 NETIF_MSG_PKTDATA = 0x1000,
840 NETIF_MSG_HW = 0x2000,
841 NETIF_MSG_WOL = 0x4000,
842};
843
844#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
845#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
846#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
847#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
848#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
849#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
850#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
851#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
852#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
853#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
854#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
855#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
856#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
857#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
858#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
859
860static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
861{
862 /* use default */
863 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
864 return default_msg_enable_bits;
865 if (debug_value == 0) /* no output */
866 return 0;
867 /* set low N bits */
868 return (1 << debug_value) - 1;
869}
870
0a122576
SH		 871/* Test if receive needs to be scheduled */
872static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 873{
874 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
875}
1da177e4 876
0a122576 877/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 878static inline int netif_rx_schedule_prep(struct net_device *dev)
879{
0a122576 880 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 881}
882
883/* Add interface to tail of rx poll list. This assumes that _prep has
884 * already been called and returned 1.
885 */
886
56079431 887extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 888
889/* Try to reschedule poll. Called by irq handler. */
890
891static inline void netif_rx_schedule(struct net_device *dev)
892{
893 if (netif_rx_schedule_prep(dev))
894 __netif_rx_schedule(dev);
895}
896
d3240312
SH		 897/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
898 * Do not inline this?
899 */
1da177e4
LT		 900static inline int netif_rx_reschedule(struct net_device *dev, int undo)
901{
902 if (netif_rx_schedule_prep(dev)) {
903 unsigned long flags;
d3240312
SH		 904
905 dev->quota += undo;
906
1da177e4 907 local_irq_save(flags);
d3240312
SH		 908 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
909 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 910 local_irq_restore(flags);
911 return 1;
912 }
913 return 0;
914}
915
b0ba6667
HX		 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
1da177e4
LT		 927/* Remove interface from poll list: it must be in the poll list
928 * on current cpu. This primitive is called by dev->poll(), when
929 * it completes the work. The device cannot be out of poll list at this
930 * moment, it is BUG().
931 */
932static inline void netif_rx_complete(struct net_device *dev)
933{
934 unsigned long flags;
935
936 local_irq_save(flags);
b0ba6667 937 __netif_rx_complete(dev);
1da177e4
LT		 938 local_irq_restore(flags);
939}
940
941static inline void netif_poll_disable(struct net_device *dev)
942{
3173c890 943 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 944 /* No hurry. */
3173c890 945 schedule_timeout_interruptible(1);
1da177e4
LT		 946}
947
948static inline void netif_poll_enable(struct net_device *dev)
949{
e44c39bd 950 smp_mb__before_clear_bit();
1da177e4 951 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1da177e4
LT		 952}
953
932ff279
HX		 954static inline void netif_tx_lock(struct net_device *dev)
955{
956 spin_lock(&dev->_xmit_lock);
957 dev->xmit_lock_owner = smp_processor_id();
958}
959
960static inline void netif_tx_lock_bh(struct net_device *dev)
961{
962 spin_lock_bh(&dev->_xmit_lock);
963 dev->xmit_lock_owner = smp_processor_id();
964}
965
966static inline int netif_tx_trylock(struct net_device *dev)
967{
53c4b2cc
HX		 968 int ok = spin_trylock(&dev->_xmit_lock);
969 if (likely(ok))
932ff279 970 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 971 return ok;
932ff279
HX		 972}
973
974static inline void netif_tx_unlock(struct net_device *dev)
975{
976 dev->xmit_lock_owner = -1;
977 spin_unlock(&dev->_xmit_lock);
978}
979
980static inline void netif_tx_unlock_bh(struct net_device *dev)
981{
982 dev->xmit_lock_owner = -1;
983 spin_unlock_bh(&dev->_xmit_lock);
984}
985
1da177e4
LT		 986static inline void netif_tx_disable(struct net_device *dev)
987{
932ff279 988 netif_tx_lock_bh(dev);
1da177e4 989 netif_stop_queue(dev);
932ff279 990 netif_tx_unlock_bh(dev);
1da177e4
LT		 991}
992
993/* These functions live elsewhere (drivers/net/net_init.c, but related) */
994
995extern void ether_setup(struct net_device *dev);
996
997/* Support for loadable net-drivers */
998extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
999 void (*setup)(struct net_device *));
1000extern int register_netdev(struct net_device *dev);
1001extern void unregister_netdev(struct net_device *dev);
1002/* Functions used for multicast support */
1003extern void dev_mc_upload(struct net_device *dev);
1004extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1005extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1006extern void dev_mc_discard(struct net_device *dev);
1007extern void dev_set_promiscuity(struct net_device *dev, int inc);
1008extern void dev_set_allmulti(struct net_device *dev, int inc);
1009extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1010extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 1011/* Load a device via the kmod */
1012extern void dev_load(const char *name);
1013extern void dev_mcast_init(void);
1014extern int netdev_max_backlog;
1015extern int weight_p;
1016extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1017extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1018extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1019#ifdef CONFIG_BUG
1020extern void netdev_rx_csum_fault(struct net_device *dev);
1021#else
1022static inline void netdev_rx_csum_fault(struct net_device *dev)
1023{
1024}
1025#endif
1da177e4
LT		 1026/* rx skb timestamps */
1027extern void net_enable_timestamp(void);
1028extern void net_disable_timestamp(void);
1029
20380731
ACM		 1030#ifdef CONFIG_PROC_FS
1031extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1032extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1033extern void dev_seq_stop(struct seq_file *seq, void *v);
1034#endif
1035
1036extern void linkwatch_run_queue(void);
1037
bcd76111 1038static inline int net_gso_ok(int features, int gso_type)
576a30eb 1039{
bcd76111 1040 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1041 return (features & feature) == feature;
576a30eb
HX		 1042}
1043
bcd76111
HX		 1044static inline int skb_gso_ok(struct sk_buff *skb, int features)
1045{
a430a43d 1046 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1047}
1048
7967168c
HX		 1049static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1050{
a430a43d
HX		 1051 return skb_is_gso(skb) &&
1052 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1053 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1054}
1055
7ea49ed7 1056/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1057 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1058 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1059 */
1060static inline int skb_bond_should_drop(struct sk_buff *skb)
1061{
1062 struct net_device *dev = skb->dev;
1063 struct net_device *master = dev->master;
1064
1065 if (master &&
1066 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1067 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1068 skb->protocol == __constant_htons(ETH_P_ARP))
1069 return 0;
1070
7ea49ed7
DM		 1071 if (master->priv_flags & IFF_MASTER_ALB) {
1072 if (skb->pkt_type != PACKET_BROADCAST &&
1073 skb->pkt_type != PACKET_MULTICAST)
1074 return 0;
1075 }
1076 if (master->priv_flags & IFF_MASTER_8023AD &&
1077 skb->protocol == __constant_htons(ETH_P_SLOW))
1078 return 0;
1079
1080 return 1;
1081 }
1082 return 0;
1083}
1084
1da177e4
LT		 1085#endif /* __KERNEL__ */
1086
1087#endif /* _LINUX_DEV_H */
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