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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];
1da177e4 543};
43cb76d9 544#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 545
546#define NETDEV_ALIGN 32
547#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
548
6472ce60 549static inline void *netdev_priv(const struct net_device *dev)
1da177e4
LT		 550{
551 return (char *)dev + ((sizeof(struct net_device)
552 + NETDEV_ALIGN_CONST)
553 & ~NETDEV_ALIGN_CONST);
554}
555
556#define SET_MODULE_OWNER(dev) do { } while (0)
557/* Set the sysfs physical device reference for the network logical device
558 * if set prior to registration will cause a symlink during initialization.
559 */
43cb76d9 560#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4
LT		 561
562struct packet_type {
f2ccd8fa
DM		 563 __be16 type; /* This is really htons(ether_type). */
564 struct net_device *dev; /* NULL is wildcarded here */
565 int (*func) (struct sk_buff *,
566 struct net_device *,
567 struct packet_type *,
568 struct net_device *);
576a30eb
HX		 569 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
570 int features);
a430a43d 571 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 572 void *af_packet_priv;
573 struct list_head list;
574};
575
576#include <linux/interrupt.h>
577#include <linux/notifier.h>
578
579extern struct net_device loopback_dev; /* The loopback */
7562f876 580extern struct list_head dev_base_head; /* All devices */
1da177e4
LT		 581extern rwlock_t dev_base_lock; /* Device list lock */
582
7562f876
PE		 583#define for_each_netdev(d) \
584 list_for_each_entry(d, &dev_base_head, dev_list)
585#define for_each_netdev_safe(d, n) \
586 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
587#define for_each_netdev_continue(d) \
588 list_for_each_entry_continue(d, &dev_base_head, dev_list)
589#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
590
591static inline struct net_device *next_net_device(struct net_device *dev)
592{
593 struct list_head *lh;
594
595 lh = dev->dev_list.next;
596 return lh == &dev_base_head ? NULL : net_device_entry(lh);
597}
598
599static inline struct net_device *first_net_device(void)
600{
601 return list_empty(&dev_base_head) ? NULL :
602 net_device_entry(dev_base_head.next);
603}
604
1da177e4
LT		 605extern int netdev_boot_setup_check(struct net_device *dev);
606extern unsigned long netdev_boot_base(const char *prefix, int unit);
607extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
608extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
4e9cac2b 609extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
1da177e4
LT		 610extern void dev_add_pack(struct packet_type *pt);
611extern void dev_remove_pack(struct packet_type *pt);
612extern void __dev_remove_pack(struct packet_type *pt);
613
614extern struct net_device *dev_get_by_flags(unsigned short flags,
615 unsigned short mask);
616extern struct net_device *dev_get_by_name(const char *name);
617extern struct net_device *__dev_get_by_name(const char *name);
618extern int dev_alloc_name(struct net_device *dev, const char *name);
619extern int dev_open(struct net_device *dev);
620extern int dev_close(struct net_device *dev);
621extern int dev_queue_xmit(struct sk_buff *skb);
622extern int register_netdevice(struct net_device *dev);
22f8cde5 623extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 624extern void free_netdev(struct net_device *dev);
625extern void synchronize_net(void);
626extern int register_netdevice_notifier(struct notifier_block *nb);
627extern int unregister_netdevice_notifier(struct notifier_block *nb);
628extern int call_netdevice_notifiers(unsigned long val, void *v);
629extern struct net_device *dev_get_by_index(int ifindex);
630extern struct net_device *__dev_get_by_index(int ifindex);
631extern int dev_restart(struct net_device *dev);
632#ifdef CONFIG_NETPOLL_TRAP
633extern int netpoll_trap(void);
634#endif
635
636typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
637extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
638static inline int unregister_gifconf(unsigned int family)
639{
640 return register_gifconf(family, NULL);
641}
642
643/*
644 * Incoming packets are placed on per-cpu queues so that
645 * no locking is needed.
646 */
647
648struct softnet_data
649{
31aa02c5 650 struct net_device *output_queue;
1da177e4
LT		 651 struct sk_buff_head input_pkt_queue;
652 struct list_head poll_list;
1da177e4
LT		 653 struct sk_buff *completion_queue;
654
655 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 656#ifdef CONFIG_NET_DMA
657 struct dma_chan *net_dma;
658#endif
1da177e4
LT		 659};
660
661DECLARE_PER_CPU(struct softnet_data,softnet_data);
662
663#define HAVE_NETIF_QUEUE
664
56079431 665extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 666
667static inline void netif_schedule(struct net_device *dev)
668{
669 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
670 __netif_schedule(dev);
671}
672
673static inline void netif_start_queue(struct net_device *dev)
674{
675 clear_bit(__LINK_STATE_XOFF, &dev->state);
676}
677
678static inline void netif_wake_queue(struct net_device *dev)
679{
680#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS		 681 if (netpoll_trap()) {
682 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 683 return;
5f286e11 684 }
1da177e4
LT		 685#endif
686 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
687 __netif_schedule(dev);
688}
689
690static inline void netif_stop_queue(struct net_device *dev)
691{
1da177e4
LT		 692 set_bit(__LINK_STATE_XOFF, &dev->state);
693}
694
695static inline int netif_queue_stopped(const struct net_device *dev)
696{
697 return test_bit(__LINK_STATE_XOFF, &dev->state);
698}
699
700static inline int netif_running(const struct net_device *dev)
701{
702 return test_bit(__LINK_STATE_START, &dev->state);
703}
704
705
706/* Use this variant when it is known for sure that it
707 * is executing from interrupt context.
708 */
709static inline void dev_kfree_skb_irq(struct sk_buff *skb)
710{
711 if (atomic_dec_and_test(&skb->users)) {
712 struct softnet_data *sd;
713 unsigned long flags;
714
715 local_irq_save(flags);
716 sd = &__get_cpu_var(softnet_data);
717 skb->next = sd->completion_queue;
718 sd->completion_queue = skb;
719 raise_softirq_irqoff(NET_TX_SOFTIRQ);
720 local_irq_restore(flags);
721 }
722}
723
724/* Use this variant in places where it could be invoked
725 * either from interrupt or non-interrupt context.
726 */
56079431 727extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 728
729#define HAVE_NETIF_RX 1
730extern int netif_rx(struct sk_buff *skb);
731extern int netif_rx_ni(struct sk_buff *skb);
732#define HAVE_NETIF_RECEIVE_SKB 1
733extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 734extern int dev_valid_name(const char *name);
1da177e4
LT		 735extern int dev_ioctl(unsigned int cmd, void __user *);
736extern int dev_ethtool(struct ifreq *);
737extern unsigned dev_get_flags(const struct net_device *);
738extern int dev_change_flags(struct net_device *, unsigned);
739extern int dev_change_name(struct net_device *, char *);
740extern int dev_set_mtu(struct net_device *, int);
741extern int dev_set_mac_address(struct net_device *,
742 struct sockaddr *);
f6a78bfc
HX		 743extern int dev_hard_start_xmit(struct sk_buff *skb,
744 struct net_device *dev);
1da177e4
LT		 745
746extern void dev_init(void);
747
20380731 748extern int netdev_budget;
1da177e4
LT		 749
750/* Called by rtnetlink.c:rtnl_unlock() */
751extern void netdev_run_todo(void);
752
753static inline void dev_put(struct net_device *dev)
754{
755 atomic_dec(&dev->refcnt);
756}
757
15333061
SH		 758static inline void dev_hold(struct net_device *dev)
759{
760 atomic_inc(&dev->refcnt);
761}
1da177e4
LT		 762
763/* Carrier loss detection, dial on demand. The functions netif_carrier_on
764 * and _off may be called from IRQ context, but it is caller
765 * who is responsible for serialization of these calls.
b00055aa
SR		 766 *
767 * The name carrier is inappropriate, these functions should really be
768 * called netif_lowerlayer_*() because they represent the state of any
769 * kind of lower layer not just hardware media.
1da177e4
LT		 770 */
771
772extern void linkwatch_fire_event(struct net_device *dev);
773
774static inline int netif_carrier_ok(const struct net_device *dev)
775{
776 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
777}
778
779extern void __netdev_watchdog_up(struct net_device *dev);
780
0a242efc 781extern void netif_carrier_on(struct net_device *dev);
1da177e4 782
0a242efc 783extern void netif_carrier_off(struct net_device *dev);
1da177e4 784
b00055aa
SR		 785static inline void netif_dormant_on(struct net_device *dev)
786{
787 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
788 linkwatch_fire_event(dev);
789}
790
791static inline void netif_dormant_off(struct net_device *dev)
792{
793 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
794 linkwatch_fire_event(dev);
795}
796
797static inline int netif_dormant(const struct net_device *dev)
798{
799 return test_bit(__LINK_STATE_DORMANT, &dev->state);
800}
801
802
803static inline int netif_oper_up(const struct net_device *dev) {
804 return (dev->operstate == IF_OPER_UP ||
805 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
806}
807
1da177e4
LT		 808/* Hot-plugging. */
809static inline int netif_device_present(struct net_device *dev)
810{
811 return test_bit(__LINK_STATE_PRESENT, &dev->state);
812}
813
56079431 814extern void netif_device_detach(struct net_device *dev);
1da177e4 815
56079431 816extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 817
818/*
819 * Network interface message level settings
820 */
821#define HAVE_NETIF_MSG 1
822
823enum {
824 NETIF_MSG_DRV = 0x0001,
825 NETIF_MSG_PROBE = 0x0002,
826 NETIF_MSG_LINK = 0x0004,
827 NETIF_MSG_TIMER = 0x0008,
828 NETIF_MSG_IFDOWN = 0x0010,
829 NETIF_MSG_IFUP = 0x0020,
830 NETIF_MSG_RX_ERR = 0x0040,
831 NETIF_MSG_TX_ERR = 0x0080,
832 NETIF_MSG_TX_QUEUED = 0x0100,
833 NETIF_MSG_INTR = 0x0200,
834 NETIF_MSG_TX_DONE = 0x0400,
835 NETIF_MSG_RX_STATUS = 0x0800,
836 NETIF_MSG_PKTDATA = 0x1000,
837 NETIF_MSG_HW = 0x2000,
838 NETIF_MSG_WOL = 0x4000,
839};
840
841#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
842#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
843#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
844#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
845#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
846#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
847#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
848#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
849#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
850#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
851#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
852#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
853#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
854#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
855#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
856
857static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
858{
859 /* use default */
860 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
861 return default_msg_enable_bits;
862 if (debug_value == 0) /* no output */
863 return 0;
864 /* set low N bits */
865 return (1 << debug_value) - 1;
866}
867
0a122576
SH		 868/* Test if receive needs to be scheduled */
869static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 870{
871 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
872}
1da177e4 873
0a122576 874/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 875static inline int netif_rx_schedule_prep(struct net_device *dev)
876{
0a122576 877 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 878}
879
880/* Add interface to tail of rx poll list. This assumes that _prep has
881 * already been called and returned 1.
882 */
883
56079431 884extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 885
886/* Try to reschedule poll. Called by irq handler. */
887
888static inline void netif_rx_schedule(struct net_device *dev)
889{
890 if (netif_rx_schedule_prep(dev))
891 __netif_rx_schedule(dev);
892}
893
d3240312
SH		 894/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
895 * Do not inline this?
896 */
1da177e4
LT		 897static inline int netif_rx_reschedule(struct net_device *dev, int undo)
898{
899 if (netif_rx_schedule_prep(dev)) {
900 unsigned long flags;
d3240312
SH		 901
902 dev->quota += undo;
903
1da177e4 904 local_irq_save(flags);
d3240312
SH		 905 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
906 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 907 local_irq_restore(flags);
908 return 1;
909 }
910 return 0;
911}
912
b0ba6667
HX		 913/* same as netif_rx_complete, except that local_irq_save(flags)
914 * has already been issued
915 */
916static inline void __netif_rx_complete(struct net_device *dev)
917{
918 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
919 list_del(&dev->poll_list);
920 smp_mb__before_clear_bit();
921 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
922}
923
1da177e4
LT		 924/* Remove interface from poll list: it must be in the poll list
925 * on current cpu. This primitive is called by dev->poll(), when
926 * it completes the work. The device cannot be out of poll list at this
927 * moment, it is BUG().
928 */
929static inline void netif_rx_complete(struct net_device *dev)
930{
931 unsigned long flags;
932
933 local_irq_save(flags);
b0ba6667 934 __netif_rx_complete(dev);
1da177e4
LT		 935 local_irq_restore(flags);
936}
937
938static inline void netif_poll_disable(struct net_device *dev)
939{
3173c890 940 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 941 /* No hurry. */
3173c890 942 schedule_timeout_interruptible(1);
1da177e4
LT		 943}
944
945static inline void netif_poll_enable(struct net_device *dev)
946{
e44c39bd 947 smp_mb__before_clear_bit();
1da177e4 948 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1da177e4
LT		 949}
950
932ff279
HX		 951static inline void netif_tx_lock(struct net_device *dev)
952{
953 spin_lock(&dev->_xmit_lock);
954 dev->xmit_lock_owner = smp_processor_id();
955}
956
957static inline void netif_tx_lock_bh(struct net_device *dev)
958{
959 spin_lock_bh(&dev->_xmit_lock);
960 dev->xmit_lock_owner = smp_processor_id();
961}
962
963static inline int netif_tx_trylock(struct net_device *dev)
964{
53c4b2cc
HX		 965 int ok = spin_trylock(&dev->_xmit_lock);
966 if (likely(ok))
932ff279 967 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 968 return ok;
932ff279
HX		 969}
970
971static inline void netif_tx_unlock(struct net_device *dev)
972{
973 dev->xmit_lock_owner = -1;
974 spin_unlock(&dev->_xmit_lock);
975}
976
977static inline void netif_tx_unlock_bh(struct net_device *dev)
978{
979 dev->xmit_lock_owner = -1;
980 spin_unlock_bh(&dev->_xmit_lock);
981}
982
1da177e4
LT		 983static inline void netif_tx_disable(struct net_device *dev)
984{
932ff279 985 netif_tx_lock_bh(dev);
1da177e4 986 netif_stop_queue(dev);
932ff279 987 netif_tx_unlock_bh(dev);
1da177e4
LT		 988}
989
990/* These functions live elsewhere (drivers/net/net_init.c, but related) */
991
992extern void ether_setup(struct net_device *dev);
993
994/* Support for loadable net-drivers */
995extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
996 void (*setup)(struct net_device *));
997extern int register_netdev(struct net_device *dev);
998extern void unregister_netdev(struct net_device *dev);
999/* Functions used for multicast support */
1000extern void dev_mc_upload(struct net_device *dev);
1001extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1002extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1003extern void dev_mc_discard(struct net_device *dev);
1004extern void dev_set_promiscuity(struct net_device *dev, int inc);
1005extern void dev_set_allmulti(struct net_device *dev, int inc);
1006extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1007extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 1008/* Load a device via the kmod */
1009extern void dev_load(const char *name);
1010extern void dev_mcast_init(void);
1011extern int netdev_max_backlog;
1012extern int weight_p;
1013extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1014extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1015extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1016#ifdef CONFIG_BUG
1017extern void netdev_rx_csum_fault(struct net_device *dev);
1018#else
1019static inline void netdev_rx_csum_fault(struct net_device *dev)
1020{
1021}
1022#endif
1da177e4
LT		 1023/* rx skb timestamps */
1024extern void net_enable_timestamp(void);
1025extern void net_disable_timestamp(void);
1026
20380731
ACM		 1027#ifdef CONFIG_PROC_FS
1028extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1029extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1030extern void dev_seq_stop(struct seq_file *seq, void *v);
1031#endif
1032
1033extern void linkwatch_run_queue(void);
1034
bcd76111 1035static inline int net_gso_ok(int features, int gso_type)
576a30eb 1036{
bcd76111 1037 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1038 return (features & feature) == feature;
576a30eb
HX		 1039}
1040
bcd76111
HX		 1041static inline int skb_gso_ok(struct sk_buff *skb, int features)
1042{
a430a43d 1043 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1044}
1045
7967168c
HX		 1046static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1047{
a430a43d
HX		 1048 return skb_is_gso(skb) &&
1049 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1050 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1051}
1052
7ea49ed7 1053/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1054 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1055 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1056 */
1057static inline int skb_bond_should_drop(struct sk_buff *skb)
1058{
1059 struct net_device *dev = skb->dev;
1060 struct net_device *master = dev->master;
1061
1062 if (master &&
1063 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1064 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1065 skb->protocol == __constant_htons(ETH_P_ARP))
1066 return 0;
1067
7ea49ed7
DM		 1068 if (master->priv_flags & IFF_MASTER_ALB) {
1069 if (skb->pkt_type != PACKET_BROADCAST &&
1070 skb->pkt_type != PACKET_MULTICAST)
1071 return 0;
1072 }
1073 if (master->priv_flags & IFF_MASTER_8023AD &&
1074 skb->protocol == __constant_htons(ETH_P_SLOW))
1075 return 0;
1076
1077 return 1;
1078 }
1079 return 0;
1080}
1081
1da177e4
LT		 1082#endif /* __KERNEL__ */
1083
1084#endif /* _LINUX_DEV_H */
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