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[PATCH] severing skbuff.h -> poll.h
[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__
33#include <asm/atomic.h>
34#include <asm/cache.h>
35#include <asm/byteorder.h>
36
1da177e4
LT		 37#include <linux/device.h>
38#include <linux/percpu.h>
db217334 39#include <linux/dmaengine.h>
1da177e4 40
1da177e4
LT		 41struct vlan_group;
42struct ethtool_ops;
115c1d6e 43struct netpoll_info;
1da177e4
LT		 44 /* source back-compat hooks */
45#define SET_ETHTOOL_OPS(netdev,ops) \
46 ( (netdev)->ethtool_ops = (ops) )
47
48#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
49 functions are available. */
50#define HAVE_FREE_NETDEV /* free_netdev() */
51#define HAVE_NETDEV_PRIV /* netdev_priv() */
52
53#define NET_XMIT_SUCCESS 0
54#define NET_XMIT_DROP 1 /* skb dropped */
55#define NET_XMIT_CN 2 /* congestion notification */
56#define NET_XMIT_POLICED 3 /* skb is shot by police */
57#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
58 (TC use only - dev_queue_xmit
59 returns this as NET_XMIT_SUCCESS) */
60
61/* Backlog congestion levels */
62#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
63#define NET_RX_DROP 1 /* packet dropped */
64#define NET_RX_CN_LOW 2 /* storm alert, just in case */
65#define NET_RX_CN_MOD 3 /* Storm on its way! */
66#define NET_RX_CN_HIGH 4 /* The storm is here */
67#define NET_RX_BAD 5 /* packet dropped due to kernel error */
68
b9df3cb8
GR		 69/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
70 * indicates that the device will soon be dropping packets, or already drops
71 * some packets of the same priority; prompting us to send less aggressively. */
72#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 73#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
74
75#endif
76
77#define MAX_ADDR_LEN 32 /* Largest hardware address length */
78
79/* Driver transmit return codes */
80#define NETDEV_TX_OK 0 /* driver took care of packet */
81#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
82#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
83
84/*
85 * Compute the worst case header length according to the protocols
86 * used.
87 */
88
89#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
90#define LL_MAX_HEADER 32
91#else
92#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
93#define LL_MAX_HEADER 96
94#else
95#define LL_MAX_HEADER 48
96#endif
97#endif
98
e81c7359
DM		 99#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
100 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
101 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
102 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 103#define MAX_HEADER LL_MAX_HEADER
104#else
105#define MAX_HEADER (LL_MAX_HEADER + 48)
106#endif
107
108/*
109 * Network device statistics. Akin to the 2.0 ether stats but
110 * with byte counters.
111 */
112
113struct net_device_stats
114{
115 unsigned long rx_packets; /* total packets received */
116 unsigned long tx_packets; /* total packets transmitted */
117 unsigned long rx_bytes; /* total bytes received */
118 unsigned long tx_bytes; /* total bytes transmitted */
119 unsigned long rx_errors; /* bad packets received */
120 unsigned long tx_errors; /* packet transmit problems */
121 unsigned long rx_dropped; /* no space in linux buffers */
122 unsigned long tx_dropped; /* no space available in linux */
123 unsigned long multicast; /* multicast packets received */
124 unsigned long collisions;
125
126 /* detailed rx_errors: */
127 unsigned long rx_length_errors;
128 unsigned long rx_over_errors; /* receiver ring buff overflow */
129 unsigned long rx_crc_errors; /* recved pkt with crc error */
130 unsigned long rx_frame_errors; /* recv'd frame alignment error */
131 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
132 unsigned long rx_missed_errors; /* receiver missed packet */
133
134 /* detailed tx_errors */
135 unsigned long tx_aborted_errors;
136 unsigned long tx_carrier_errors;
137 unsigned long tx_fifo_errors;
138 unsigned long tx_heartbeat_errors;
139 unsigned long tx_window_errors;
140
141 /* for cslip etc */
142 unsigned long rx_compressed;
143 unsigned long tx_compressed;
144};
145
146
147/* Media selection options. */
148enum {
149 IF_PORT_UNKNOWN = 0,
150 IF_PORT_10BASE2,
151 IF_PORT_10BASET,
152 IF_PORT_AUI,
153 IF_PORT_100BASET,
154 IF_PORT_100BASETX,
155 IF_PORT_100BASEFX
156};
157
158#ifdef __KERNEL__
159
160#include <linux/cache.h>
161#include <linux/skbuff.h>
162
163struct neighbour;
164struct neigh_parms;
165struct sk_buff;
166
167struct netif_rx_stats
168{
169 unsigned total;
170 unsigned dropped;
171 unsigned time_squeeze;
1da177e4
LT		 172 unsigned cpu_collision;
173};
174
175DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
176
177
178/*
179 * We tag multicasts with these structures.
180 */
181
182struct dev_mc_list
183{
184 struct dev_mc_list *next;
185 __u8 dmi_addr[MAX_ADDR_LEN];
186 unsigned char dmi_addrlen;
187 int dmi_users;
188 int dmi_gusers;
189};
190
191struct hh_cache
192{
193 struct hh_cache *hh_next; /* Next entry */
194 atomic_t hh_refcnt; /* number of users */
d77072ec 195 __be16 hh_type; /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 196 * NOTE: For VLANs, this will be the
197 * encapuslated type. --BLG
198 */
d5c42c0e 199 u16 hh_len; /* length of header */
1da177e4
LT		 200 int (*hh_output)(struct sk_buff *skb);
201 rwlock_t hh_lock;
202
203 /* cached hardware header; allow for machine alignment needs. */
204#define HH_DATA_MOD 16
205#define HH_DATA_OFF(__len) \
5ba0eac6 206 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 207#define HH_DATA_ALIGN(__len) \
208 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
209 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
210};
211
212/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
213 * Alternative is:
214 * dev->hard_header_len ? (dev->hard_header_len +
215 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
216 *
217 * We could use other alignment values, but we must maintain the
218 * relationship HH alignment <= LL alignment.
219 */
220#define LL_RESERVED_SPACE(dev) \
221 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
222#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
223 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
224
225/* These flag bits are private to the generic network queueing
226 * layer, they may not be explicitly referenced by any other
227 * code.
228 */
229
230enum netdev_state_t
231{
232 __LINK_STATE_XOFF=0,
233 __LINK_STATE_START,
234 __LINK_STATE_PRESENT,
235 __LINK_STATE_SCHED,
236 __LINK_STATE_NOCARRIER,
237 __LINK_STATE_RX_SCHED,
b00055aa
SR		 238 __LINK_STATE_LINKWATCH_PENDING,
239 __LINK_STATE_DORMANT,
48d83325 240 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 241};
242
243
244/*
245 * This structure holds at boot time configured netdevice settings. They
246 * are then used in the device probing.
247 */
248struct netdev_boot_setup {
249 char name[IFNAMSIZ];
250 struct ifmap map;
251};
252#define NETDEV_BOOT_SETUP_MAX 8
253
20380731 254extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 255
256/*
257 * The DEVICE structure.
258 * Actually, this whole structure is a big mistake. It mixes I/O
259 * data with strictly "high-level" data, and it has to know about
260 * almost every data structure used in the INET module.
261 *
262 * FIXME: cleanup struct net_device such that network protocol info
263 * moves out.
264 */
265
266struct net_device
267{
268
269 /*
270 * This is the first field of the "visible" part of this structure
271 * (i.e. as seen by users in the "Space.c" file). It is the name
272 * the interface.
273 */
274 char name[IFNAMSIZ];
9356b8fc
ED		 275 /* device name hash chain */
276 struct hlist_node name_hlist;
1da177e4
LT		 277
278 /*
279 * I/O specific fields
280 * FIXME: Merge these and struct ifmap into one
281 */
282 unsigned long mem_end; /* shared mem end */
283 unsigned long mem_start; /* shared mem start */
284 unsigned long base_addr; /* device I/O address */
285 unsigned int irq; /* device IRQ number */
286
287 /*
288 * Some hardware also needs these fields, but they are not
289 * part of the usual set specified in Space.c.
290 */
291
292 unsigned char if_port; /* Selectable AUI, TP,..*/
293 unsigned char dma; /* DMA channel */
294
295 unsigned long state;
296
297 struct net_device *next;
298
299 /* The device initialization function. Called only once. */
300 int (*init)(struct net_device *dev);
301
302 /* ------- Fields preinitialized in Space.c finish here ------- */
303
9356b8fc
ED		 304 /* Net device features */
305 unsigned long features;
306#define NETIF_F_SG 1 /* Scatter/gather IO. */
307#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
308#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
309#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
310#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
311#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
312#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
313#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
314#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
315#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 316#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 317#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 318
319 /* Segmentation offload features */
320#define NETIF_F_GSO_SHIFT 16
bcd76111 321#define NETIF_F_GSO_MASK 0xffff0000
7967168c 322#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 323#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 324#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 325#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
326#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 327
78eb8877
HX		 328 /* List of features with software fallbacks. */
329#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
330
8648b305
HX		 331#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
332#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
333
1da177e4
LT		 334 struct net_device *next_sched;
335
336 /* Interface index. Unique device identifier */
337 int ifindex;
338 int iflink;
339
340
341 struct net_device_stats* (*get_stats)(struct net_device *dev);
1da177e4
LT		 342
343 /* List of functions to handle Wireless Extensions (instead of ioctl).
344 * See <net/iw_handler.h> for details. Jean II */
345 const struct iw_handler_def * wireless_handlers;
346 /* Instance data managed by the core of Wireless Extensions. */
347 struct iw_public_data * wireless_data;
348
76fd8593 349 const struct ethtool_ops *ethtool_ops;
1da177e4
LT		 350
351 /*
352 * This marks the end of the "visible" part of the structure. All
353 * fields hereafter are internal to the system, and may change at
354 * will (read: may be cleaned up at will).
355 */
356
1da177e4 357
b00055aa 358 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 359 unsigned short gflags;
360 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
361 unsigned short padded; /* How much padding added by alloc_netdev() */
362
b00055aa
SR		 363 unsigned char operstate; /* RFC2863 operstate */
364 unsigned char link_mode; /* mapping policy to operstate */
365
1da177e4
LT		 366 unsigned mtu; /* interface MTU value */
367 unsigned short type; /* interface hardware type */
368 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 369
370 struct net_device *master; /* Pointer to master device of a group,
371 * which this device is member of.
372 */
373
374 /* Interface address info. */
a6f9a705 375 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 376 unsigned char addr_len; /* hardware address length */
377 unsigned short dev_id; /* for shared network cards */
378
379 struct dev_mc_list *mc_list; /* Multicast mac addresses */
380 int mc_count; /* Number of installed mcasts */
381 int promiscuity;
382 int allmulti;
383
1da177e4
LT		 384
385 /* Protocol specific pointers */
386
387 void *atalk_ptr; /* AppleTalk link */
388 void *ip_ptr; /* IPv4 specific data */
389 void *dn_ptr; /* DECnet specific data */
390 void *ip6_ptr; /* IPv6 specific data */
391 void *ec_ptr; /* Econet specific data */
392 void *ax25_ptr; /* AX.25 specific data */
393
9356b8fc
ED		 394/*
395 * Cache line mostly used on receive path (including eth_type_trans())
396 */
397 struct list_head poll_list ____cacheline_aligned_in_smp;
398 /* Link to poll list */
399
400 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 401 int quota;
402 int weight;
9356b8fc
ED		 403 unsigned long last_rx; /* Time of last Rx */
404 /* Interface address info used in eth_type_trans() */
405 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
406 because most packets are unicast) */
407
408 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 409
9356b8fc
ED		 410/*
411 * Cache line mostly used on queue transmit path (qdisc)
412 */
413 /* device queue lock */
414 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 415 struct Qdisc *qdisc;
416 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 417 struct list_head qdisc_list;
418 unsigned long tx_queue_len; /* Max frames per queue allowed */
419
f6a78bfc
HX		 420 /* Partially transmitted GSO packet. */
421 struct sk_buff *gso_skb;
422
1da177e4
LT		 423 /* ingress path synchronizer */
424 spinlock_t ingress_lock;
9356b8fc
ED		 425 struct Qdisc *qdisc_ingress;
426
427/*
428 * One part is mostly used on xmit path (device)
429 */
1da177e4 430 /* hard_start_xmit synchronizer */
932ff279 431 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 432 /* cpu id of processor entered to hard_start_xmit or -1,
433 if nobody entered there.
434 */
435 int xmit_lock_owner;
9356b8fc
ED		 436 void *priv; /* pointer to private data */
437 int (*hard_start_xmit) (struct sk_buff *skb,
438 struct net_device *dev);
439 /* These may be needed for future network-power-down code. */
440 unsigned long trans_start; /* Time (in jiffies) of last Tx */
441
442 int watchdog_timeo; /* used by dev_watchdog() */
443 struct timer_list watchdog_timer;
444
445/*
446 * refcnt is a very hot point, so align it on SMP
447 */
1da177e4 448 /* Number of references to this device */
9356b8fc
ED		 449 atomic_t refcnt ____cacheline_aligned_in_smp;
450
1da177e4
LT		 451 /* delayed register/unregister */
452 struct list_head todo_list;
1da177e4
LT		 453 /* device index hash chain */
454 struct hlist_node index_hlist;
455
456 /* register/unregister state machine */
457 enum { NETREG_UNINITIALIZED=0,
b17a7c17 458 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 459 NETREG_UNREGISTERING, /* called unregister_netdevice */
460 NETREG_UNREGISTERED, /* completed unregister todo */
461 NETREG_RELEASED, /* called free_netdev */
462 } reg_state;
463
1da177e4
LT		 464 /* Called after device is detached from network. */
465 void (*uninit)(struct net_device *dev);
466 /* Called after last user reference disappears. */
467 void (*destructor)(struct net_device *dev);
468
469 /* Pointers to interface service routines. */
470 int (*open)(struct net_device *dev);
471 int (*stop)(struct net_device *dev);
1da177e4 472#define HAVE_NETDEV_POLL
1da177e4
LT		 473 int (*hard_header) (struct sk_buff *skb,
474 struct net_device *dev,
475 unsigned short type,
476 void *daddr,
477 void *saddr,
478 unsigned len);
479 int (*rebuild_header)(struct sk_buff *skb);
480#define HAVE_MULTICAST
481 void (*set_multicast_list)(struct net_device *dev);
482#define HAVE_SET_MAC_ADDR
483 int (*set_mac_address)(struct net_device *dev,
484 void *addr);
485#define HAVE_PRIVATE_IOCTL
486 int (*do_ioctl)(struct net_device *dev,
487 struct ifreq *ifr, int cmd);
488#define HAVE_SET_CONFIG
489 int (*set_config)(struct net_device *dev,
490 struct ifmap *map);
491#define HAVE_HEADER_CACHE
492 int (*hard_header_cache)(struct neighbour *neigh,
493 struct hh_cache *hh);
494 void (*header_cache_update)(struct hh_cache *hh,
495 struct net_device *dev,
496 unsigned char * haddr);
497#define HAVE_CHANGE_MTU
498 int (*change_mtu)(struct net_device *dev, int new_mtu);
499
500#define HAVE_TX_TIMEOUT
501 void (*tx_timeout) (struct net_device *dev);
502
503 void (*vlan_rx_register)(struct net_device *dev,
504 struct vlan_group *grp);
505 void (*vlan_rx_add_vid)(struct net_device *dev,
506 unsigned short vid);
507 void (*vlan_rx_kill_vid)(struct net_device *dev,
508 unsigned short vid);
509
510 int (*hard_header_parse)(struct sk_buff *skb,
511 unsigned char *haddr);
512 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
513#ifdef CONFIG_NETPOLL
115c1d6e 514 struct netpoll_info *npinfo;
1da177e4
LT		 515#endif
516#ifdef CONFIG_NET_POLL_CONTROLLER
517 void (*poll_controller)(struct net_device *dev);
518#endif
519
520 /* bridge stuff */
521 struct net_bridge_port *br_port;
522
1da177e4
LT		 523 /* class/net/name entry */
524 struct class_device class_dev;
fe9925b5
SH		 525 /* space for optional statistics and wireless sysfs groups */
526 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 527};
528
529#define NETDEV_ALIGN 32
530#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
531
532static inline void *netdev_priv(struct net_device *dev)
533{
534 return (char *)dev + ((sizeof(struct net_device)
535 + NETDEV_ALIGN_CONST)
536 & ~NETDEV_ALIGN_CONST);
537}
538
539#define SET_MODULE_OWNER(dev) do { } while (0)
540/* Set the sysfs physical device reference for the network logical device
541 * if set prior to registration will cause a symlink during initialization.
542 */
543#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
544
545struct packet_type {
f2ccd8fa
DM		 546 __be16 type; /* This is really htons(ether_type). */
547 struct net_device *dev; /* NULL is wildcarded here */
548 int (*func) (struct sk_buff *,
549 struct net_device *,
550 struct packet_type *,
551 struct net_device *);
576a30eb
HX		 552 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
553 int features);
a430a43d 554 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 555 void *af_packet_priv;
556 struct list_head list;
557};
558
559#include <linux/interrupt.h>
560#include <linux/notifier.h>
561
562extern struct net_device loopback_dev; /* The loopback */
563extern struct net_device *dev_base; /* All devices */
564extern rwlock_t dev_base_lock; /* Device list lock */
565
566extern int netdev_boot_setup_check(struct net_device *dev);
567extern unsigned long netdev_boot_base(const char *prefix, int unit);
568extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
569extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
570extern void dev_add_pack(struct packet_type *pt);
571extern void dev_remove_pack(struct packet_type *pt);
572extern void __dev_remove_pack(struct packet_type *pt);
573
574extern struct net_device *dev_get_by_flags(unsigned short flags,
575 unsigned short mask);
576extern struct net_device *dev_get_by_name(const char *name);
577extern struct net_device *__dev_get_by_name(const char *name);
578extern int dev_alloc_name(struct net_device *dev, const char *name);
579extern int dev_open(struct net_device *dev);
580extern int dev_close(struct net_device *dev);
581extern int dev_queue_xmit(struct sk_buff *skb);
582extern int register_netdevice(struct net_device *dev);
583extern int unregister_netdevice(struct net_device *dev);
584extern void free_netdev(struct net_device *dev);
585extern void synchronize_net(void);
586extern int register_netdevice_notifier(struct notifier_block *nb);
587extern int unregister_netdevice_notifier(struct notifier_block *nb);
588extern int call_netdevice_notifiers(unsigned long val, void *v);
589extern struct net_device *dev_get_by_index(int ifindex);
590extern struct net_device *__dev_get_by_index(int ifindex);
591extern int dev_restart(struct net_device *dev);
592#ifdef CONFIG_NETPOLL_TRAP
593extern int netpoll_trap(void);
594#endif
595
596typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
597extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
598static inline int unregister_gifconf(unsigned int family)
599{
600 return register_gifconf(family, NULL);
601}
602
603/*
604 * Incoming packets are placed on per-cpu queues so that
605 * no locking is needed.
606 */
607
608struct softnet_data
609{
31aa02c5 610 struct net_device *output_queue;
1da177e4
LT		 611 struct sk_buff_head input_pkt_queue;
612 struct list_head poll_list;
1da177e4
LT		 613 struct sk_buff *completion_queue;
614
615 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 616#ifdef CONFIG_NET_DMA
617 struct dma_chan *net_dma;
618#endif
1da177e4
LT		 619};
620
621DECLARE_PER_CPU(struct softnet_data,softnet_data);
622
623#define HAVE_NETIF_QUEUE
624
56079431 625extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 626
627static inline void netif_schedule(struct net_device *dev)
628{
629 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
630 __netif_schedule(dev);
631}
632
633static inline void netif_start_queue(struct net_device *dev)
634{
635 clear_bit(__LINK_STATE_XOFF, &dev->state);
636}
637
638static inline void netif_wake_queue(struct net_device *dev)
639{
640#ifdef CONFIG_NETPOLL_TRAP
641 if (netpoll_trap())
642 return;
643#endif
644 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
645 __netif_schedule(dev);
646}
647
648static inline void netif_stop_queue(struct net_device *dev)
649{
650#ifdef CONFIG_NETPOLL_TRAP
651 if (netpoll_trap())
652 return;
653#endif
654 set_bit(__LINK_STATE_XOFF, &dev->state);
655}
656
657static inline int netif_queue_stopped(const struct net_device *dev)
658{
659 return test_bit(__LINK_STATE_XOFF, &dev->state);
660}
661
662static inline int netif_running(const struct net_device *dev)
663{
664 return test_bit(__LINK_STATE_START, &dev->state);
665}
666
667
668/* Use this variant when it is known for sure that it
669 * is executing from interrupt context.
670 */
671static inline void dev_kfree_skb_irq(struct sk_buff *skb)
672{
673 if (atomic_dec_and_test(&skb->users)) {
674 struct softnet_data *sd;
675 unsigned long flags;
676
677 local_irq_save(flags);
678 sd = &__get_cpu_var(softnet_data);
679 skb->next = sd->completion_queue;
680 sd->completion_queue = skb;
681 raise_softirq_irqoff(NET_TX_SOFTIRQ);
682 local_irq_restore(flags);
683 }
684}
685
686/* Use this variant in places where it could be invoked
687 * either from interrupt or non-interrupt context.
688 */
56079431 689extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 690
691#define HAVE_NETIF_RX 1
692extern int netif_rx(struct sk_buff *skb);
693extern int netif_rx_ni(struct sk_buff *skb);
694#define HAVE_NETIF_RECEIVE_SKB 1
695extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 696extern int dev_valid_name(const char *name);
1da177e4
LT		 697extern int dev_ioctl(unsigned int cmd, void __user *);
698extern int dev_ethtool(struct ifreq *);
699extern unsigned dev_get_flags(const struct net_device *);
700extern int dev_change_flags(struct net_device *, unsigned);
701extern int dev_change_name(struct net_device *, char *);
702extern int dev_set_mtu(struct net_device *, int);
703extern int dev_set_mac_address(struct net_device *,
704 struct sockaddr *);
f6a78bfc
HX		 705extern int dev_hard_start_xmit(struct sk_buff *skb,
706 struct net_device *dev);
1da177e4
LT		 707
708extern void dev_init(void);
709
20380731 710extern int netdev_budget;
1da177e4
LT		 711
712/* Called by rtnetlink.c:rtnl_unlock() */
713extern void netdev_run_todo(void);
714
715static inline void dev_put(struct net_device *dev)
716{
717 atomic_dec(&dev->refcnt);
718}
719
15333061
SH		 720static inline void dev_hold(struct net_device *dev)
721{
722 atomic_inc(&dev->refcnt);
723}
1da177e4
LT		 724
725/* Carrier loss detection, dial on demand. The functions netif_carrier_on
726 * and _off may be called from IRQ context, but it is caller
727 * who is responsible for serialization of these calls.
b00055aa
SR		 728 *
729 * The name carrier is inappropriate, these functions should really be
730 * called netif_lowerlayer_*() because they represent the state of any
731 * kind of lower layer not just hardware media.
1da177e4
LT		 732 */
733
734extern void linkwatch_fire_event(struct net_device *dev);
735
736static inline int netif_carrier_ok(const struct net_device *dev)
737{
738 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
739}
740
741extern void __netdev_watchdog_up(struct net_device *dev);
742
0a242efc 743extern void netif_carrier_on(struct net_device *dev);
1da177e4 744
0a242efc 745extern void netif_carrier_off(struct net_device *dev);
1da177e4 746
b00055aa
SR		 747static inline void netif_dormant_on(struct net_device *dev)
748{
749 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
750 linkwatch_fire_event(dev);
751}
752
753static inline void netif_dormant_off(struct net_device *dev)
754{
755 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
756 linkwatch_fire_event(dev);
757}
758
759static inline int netif_dormant(const struct net_device *dev)
760{
761 return test_bit(__LINK_STATE_DORMANT, &dev->state);
762}
763
764
765static inline int netif_oper_up(const struct net_device *dev) {
766 return (dev->operstate == IF_OPER_UP ||
767 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
768}
769
1da177e4
LT		 770/* Hot-plugging. */
771static inline int netif_device_present(struct net_device *dev)
772{
773 return test_bit(__LINK_STATE_PRESENT, &dev->state);
774}
775
56079431 776extern void netif_device_detach(struct net_device *dev);
1da177e4 777
56079431 778extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 779
780/*
781 * Network interface message level settings
782 */
783#define HAVE_NETIF_MSG 1
784
785enum {
786 NETIF_MSG_DRV = 0x0001,
787 NETIF_MSG_PROBE = 0x0002,
788 NETIF_MSG_LINK = 0x0004,
789 NETIF_MSG_TIMER = 0x0008,
790 NETIF_MSG_IFDOWN = 0x0010,
791 NETIF_MSG_IFUP = 0x0020,
792 NETIF_MSG_RX_ERR = 0x0040,
793 NETIF_MSG_TX_ERR = 0x0080,
794 NETIF_MSG_TX_QUEUED = 0x0100,
795 NETIF_MSG_INTR = 0x0200,
796 NETIF_MSG_TX_DONE = 0x0400,
797 NETIF_MSG_RX_STATUS = 0x0800,
798 NETIF_MSG_PKTDATA = 0x1000,
799 NETIF_MSG_HW = 0x2000,
800 NETIF_MSG_WOL = 0x4000,
801};
802
803#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
804#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
805#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
806#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
807#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
808#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
809#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
810#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
811#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
812#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
813#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
814#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
815#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
816#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
817#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
818
819static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
820{
821 /* use default */
822 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
823 return default_msg_enable_bits;
824 if (debug_value == 0) /* no output */
825 return 0;
826 /* set low N bits */
827 return (1 << debug_value) - 1;
828}
829
0a122576
SH		 830/* Test if receive needs to be scheduled */
831static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 832{
833 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
834}
1da177e4 835
0a122576 836/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 837static inline int netif_rx_schedule_prep(struct net_device *dev)
838{
0a122576 839 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 840}
841
842/* Add interface to tail of rx poll list. This assumes that _prep has
843 * already been called and returned 1.
844 */
845
56079431 846extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 847
848/* Try to reschedule poll. Called by irq handler. */
849
850static inline void netif_rx_schedule(struct net_device *dev)
851{
852 if (netif_rx_schedule_prep(dev))
853 __netif_rx_schedule(dev);
854}
855
d3240312
SH		 856/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
857 * Do not inline this?
858 */
1da177e4
LT		 859static inline int netif_rx_reschedule(struct net_device *dev, int undo)
860{
861 if (netif_rx_schedule_prep(dev)) {
862 unsigned long flags;
d3240312
SH		 863
864 dev->quota += undo;
865
1da177e4 866 local_irq_save(flags);
d3240312
SH		 867 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
868 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 869 local_irq_restore(flags);
870 return 1;
871 }
872 return 0;
873}
874
875/* Remove interface from poll list: it must be in the poll list
876 * on current cpu. This primitive is called by dev->poll(), when
877 * it completes the work. The device cannot be out of poll list at this
878 * moment, it is BUG().
879 */
880static inline void netif_rx_complete(struct net_device *dev)
881{
882 unsigned long flags;
883
884 local_irq_save(flags);
885 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
886 list_del(&dev->poll_list);
887 smp_mb__before_clear_bit();
888 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
889 local_irq_restore(flags);
890}
891
892static inline void netif_poll_disable(struct net_device *dev)
893{
3173c890 894 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 895 /* No hurry. */
3173c890 896 schedule_timeout_interruptible(1);
1da177e4
LT		 897}
898
899static inline void netif_poll_enable(struct net_device *dev)
900{
901 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
902}
903
904/* same as netif_rx_complete, except that local_irq_save(flags)
905 * has already been issued
906 */
907static inline void __netif_rx_complete(struct net_device *dev)
908{
909 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
910 list_del(&dev->poll_list);
911 smp_mb__before_clear_bit();
912 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
913}
914
932ff279
HX		 915static inline void netif_tx_lock(struct net_device *dev)
916{
917 spin_lock(&dev->_xmit_lock);
918 dev->xmit_lock_owner = smp_processor_id();
919}
920
921static inline void netif_tx_lock_bh(struct net_device *dev)
922{
923 spin_lock_bh(&dev->_xmit_lock);
924 dev->xmit_lock_owner = smp_processor_id();
925}
926
927static inline int netif_tx_trylock(struct net_device *dev)
928{
53c4b2cc
HX		 929 int ok = spin_trylock(&dev->_xmit_lock);
930 if (likely(ok))
932ff279 931 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 932 return ok;
932ff279
HX		 933}
934
935static inline void netif_tx_unlock(struct net_device *dev)
936{
937 dev->xmit_lock_owner = -1;
938 spin_unlock(&dev->_xmit_lock);
939}
940
941static inline void netif_tx_unlock_bh(struct net_device *dev)
942{
943 dev->xmit_lock_owner = -1;
944 spin_unlock_bh(&dev->_xmit_lock);
945}
946
1da177e4
LT		 947static inline void netif_tx_disable(struct net_device *dev)
948{
932ff279 949 netif_tx_lock_bh(dev);
1da177e4 950 netif_stop_queue(dev);
932ff279 951 netif_tx_unlock_bh(dev);
1da177e4
LT		 952}
953
954/* These functions live elsewhere (drivers/net/net_init.c, but related) */
955
956extern void ether_setup(struct net_device *dev);
957
958/* Support for loadable net-drivers */
959extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
960 void (*setup)(struct net_device *));
961extern int register_netdev(struct net_device *dev);
962extern void unregister_netdev(struct net_device *dev);
963/* Functions used for multicast support */
964extern void dev_mc_upload(struct net_device *dev);
965extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
966extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
967extern void dev_mc_discard(struct net_device *dev);
968extern void dev_set_promiscuity(struct net_device *dev, int inc);
969extern void dev_set_allmulti(struct net_device *dev, int inc);
970extern void netdev_state_change(struct net_device *dev);
d8a33ac4 971extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 972/* Load a device via the kmod */
973extern void dev_load(const char *name);
974extern void dev_mcast_init(void);
975extern int netdev_max_backlog;
976extern int weight_p;
977extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 978extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 979extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 980#ifdef CONFIG_BUG
981extern void netdev_rx_csum_fault(struct net_device *dev);
982#else
983static inline void netdev_rx_csum_fault(struct net_device *dev)
984{
985}
986#endif
1da177e4
LT		 987/* rx skb timestamps */
988extern void net_enable_timestamp(void);
989extern void net_disable_timestamp(void);
990
20380731
ACM		 991#ifdef CONFIG_PROC_FS
992extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
993extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
994extern void dev_seq_stop(struct seq_file *seq, void *v);
995#endif
996
997extern void linkwatch_run_queue(void);
998
bcd76111 999static inline int net_gso_ok(int features, int gso_type)
576a30eb 1000{
bcd76111 1001 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1002 return (features & feature) == feature;
576a30eb
HX		 1003}
1004
bcd76111
HX		 1005static inline int skb_gso_ok(struct sk_buff *skb, int features)
1006{
a430a43d 1007 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1008}
1009
7967168c
HX		 1010static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1011{
a430a43d
HX		 1012 return skb_is_gso(skb) &&
1013 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1014 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1015}
1016
7ea49ed7 1017/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1018 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1019 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1020 */
1021static inline int skb_bond_should_drop(struct sk_buff *skb)
1022{
1023 struct net_device *dev = skb->dev;
1024 struct net_device *master = dev->master;
1025
1026 if (master &&
1027 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1028 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1029 skb->protocol == __constant_htons(ETH_P_ARP))
1030 return 0;
1031
7ea49ed7
DM		 1032 if (master->priv_flags & IFF_MASTER_ALB) {
1033 if (skb->pkt_type != PACKET_BROADCAST &&
1034 skb->pkt_type != PACKET_MULTICAST)
1035 return 0;
1036 }
1037 if (master->priv_flags & IFF_MASTER_8023AD &&
1038 skb->protocol == __constant_htons(ETH_P_SLOW))
1039 return 0;
1040
1041 return 1;
1042 }
1043 return 0;
1044}
1045
1da177e4
LT		 1046#endif /* __KERNEL__ */
1047
1048#endif /* _LINUX_DEV_H */
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