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[WIRELESS]: Refactor wireless Kconfig.
[mirror_ubuntu-bionic-kernel.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;
1da177e4
LT		 45 /* source back-compat hooks */
46#define SET_ETHTOOL_OPS(netdev,ops) \
47 ( (netdev)->ethtool_ops = (ops) )
48
49#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
50 functions are available. */
51#define HAVE_FREE_NETDEV /* free_netdev() */
52#define HAVE_NETDEV_PRIV /* netdev_priv() */
53
54#define NET_XMIT_SUCCESS 0
55#define NET_XMIT_DROP 1 /* skb dropped */
56#define NET_XMIT_CN 2 /* congestion notification */
57#define NET_XMIT_POLICED 3 /* skb is shot by police */
58#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
59 (TC use only - dev_queue_xmit
60 returns this as NET_XMIT_SUCCESS) */
61
62/* Backlog congestion levels */
63#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
64#define NET_RX_DROP 1 /* packet dropped */
65#define NET_RX_CN_LOW 2 /* storm alert, just in case */
66#define NET_RX_CN_MOD 3 /* Storm on its way! */
67#define NET_RX_CN_HIGH 4 /* The storm is here */
68#define NET_RX_BAD 5 /* packet dropped due to kernel error */
69
b9df3cb8
GR		 70/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
71 * indicates that the device will soon be dropping packets, or already drops
72 * some packets of the same priority; prompting us to send less aggressively. */
73#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 74#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
75
76#endif
77
78#define MAX_ADDR_LEN 32 /* Largest hardware address length */
79
80/* Driver transmit return codes */
81#define NETDEV_TX_OK 0 /* driver took care of packet */
82#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
83#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
84
85/*
86 * Compute the worst case header length according to the protocols
87 * used.
88 */
89
90#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
91#define LL_MAX_HEADER 32
92#else
93#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
94#define LL_MAX_HEADER 96
95#else
96#define LL_MAX_HEADER 48
97#endif
98#endif
99
e81c7359
DM		 100#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
101 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
102 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
103 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 104#define MAX_HEADER LL_MAX_HEADER
105#else
106#define MAX_HEADER (LL_MAX_HEADER + 48)
107#endif
108
109/*
110 * Network device statistics. Akin to the 2.0 ether stats but
111 * with byte counters.
112 */
113
114struct net_device_stats
115{
116 unsigned long rx_packets; /* total packets received */
117 unsigned long tx_packets; /* total packets transmitted */
118 unsigned long rx_bytes; /* total bytes received */
119 unsigned long tx_bytes; /* total bytes transmitted */
120 unsigned long rx_errors; /* bad packets received */
121 unsigned long tx_errors; /* packet transmit problems */
122 unsigned long rx_dropped; /* no space in linux buffers */
123 unsigned long tx_dropped; /* no space available in linux */
124 unsigned long multicast; /* multicast packets received */
125 unsigned long collisions;
126
127 /* detailed rx_errors: */
128 unsigned long rx_length_errors;
129 unsigned long rx_over_errors; /* receiver ring buff overflow */
130 unsigned long rx_crc_errors; /* recved pkt with crc error */
131 unsigned long rx_frame_errors; /* recv'd frame alignment error */
132 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
133 unsigned long rx_missed_errors; /* receiver missed packet */
134
135 /* detailed tx_errors */
136 unsigned long tx_aborted_errors;
137 unsigned long tx_carrier_errors;
138 unsigned long tx_fifo_errors;
139 unsigned long tx_heartbeat_errors;
140 unsigned long tx_window_errors;
141
142 /* for cslip etc */
143 unsigned long rx_compressed;
144 unsigned long tx_compressed;
145};
146
147
148/* Media selection options. */
149enum {
150 IF_PORT_UNKNOWN = 0,
151 IF_PORT_10BASE2,
152 IF_PORT_10BASET,
153 IF_PORT_AUI,
154 IF_PORT_100BASET,
155 IF_PORT_100BASETX,
156 IF_PORT_100BASEFX
157};
158
159#ifdef __KERNEL__
160
161#include <linux/cache.h>
162#include <linux/skbuff.h>
163
164struct neighbour;
165struct neigh_parms;
166struct sk_buff;
167
168struct netif_rx_stats
169{
170 unsigned total;
171 unsigned dropped;
172 unsigned time_squeeze;
1da177e4
LT		 173 unsigned cpu_collision;
174};
175
176DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
177
178
179/*
180 * We tag multicasts with these structures.
181 */
182
183struct dev_mc_list
184{
185 struct dev_mc_list *next;
186 __u8 dmi_addr[MAX_ADDR_LEN];
187 unsigned char dmi_addrlen;
188 int dmi_users;
189 int dmi_gusers;
190};
191
192struct hh_cache
193{
194 struct hh_cache *hh_next; /* Next entry */
195 atomic_t hh_refcnt; /* number of users */
f0490980
ED		 196/*
197 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
198 * cache line on SMP.
199 * They are mostly read, but hh_refcnt may be changed quite frequently,
200 * incurring cache line ping pongs.
201 */
202 __be16 hh_type ____cacheline_aligned_in_smp;
203 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 204 * NOTE: For VLANs, this will be the
205 * encapuslated type. --BLG
206 */
d5c42c0e 207 u16 hh_len; /* length of header */
1da177e4 208 int (*hh_output)(struct sk_buff *skb);
3644f0ce 209 seqlock_t hh_lock;
1da177e4
LT		 210
211 /* cached hardware header; allow for machine alignment needs. */
212#define HH_DATA_MOD 16
213#define HH_DATA_OFF(__len) \
5ba0eac6 214 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 215#define HH_DATA_ALIGN(__len) \
216 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
217 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
218};
219
220/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
221 * Alternative is:
222 * dev->hard_header_len ? (dev->hard_header_len +
223 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
224 *
225 * We could use other alignment values, but we must maintain the
226 * relationship HH alignment <= LL alignment.
227 */
228#define LL_RESERVED_SPACE(dev) \
229 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
230#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
231 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
232
233/* These flag bits are private to the generic network queueing
234 * layer, they may not be explicitly referenced by any other
235 * code.
236 */
237
238enum netdev_state_t
239{
240 __LINK_STATE_XOFF=0,
241 __LINK_STATE_START,
242 __LINK_STATE_PRESENT,
243 __LINK_STATE_SCHED,
244 __LINK_STATE_NOCARRIER,
245 __LINK_STATE_RX_SCHED,
b00055aa
SR		 246 __LINK_STATE_LINKWATCH_PENDING,
247 __LINK_STATE_DORMANT,
48d83325 248 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 249};
250
251
252/*
253 * This structure holds at boot time configured netdevice settings. They
254 * are then used in the device probing.
255 */
256struct netdev_boot_setup {
257 char name[IFNAMSIZ];
258 struct ifmap map;
259};
260#define NETDEV_BOOT_SETUP_MAX 8
261
20380731 262extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 263
264/*
265 * The DEVICE structure.
266 * Actually, this whole structure is a big mistake. It mixes I/O
267 * data with strictly "high-level" data, and it has to know about
268 * almost every data structure used in the INET module.
269 *
270 * FIXME: cleanup struct net_device such that network protocol info
271 * moves out.
272 */
273
274struct net_device
275{
276
277 /*
278 * This is the first field of the "visible" part of this structure
279 * (i.e. as seen by users in the "Space.c" file). It is the name
280 * the interface.
281 */
282 char name[IFNAMSIZ];
9356b8fc
ED		 283 /* device name hash chain */
284 struct hlist_node name_hlist;
1da177e4
LT		 285
286 /*
287 * I/O specific fields
288 * FIXME: Merge these and struct ifmap into one
289 */
290 unsigned long mem_end; /* shared mem end */
291 unsigned long mem_start; /* shared mem start */
292 unsigned long base_addr; /* device I/O address */
293 unsigned int irq; /* device IRQ number */
294
295 /*
296 * Some hardware also needs these fields, but they are not
297 * part of the usual set specified in Space.c.
298 */
299
300 unsigned char if_port; /* Selectable AUI, TP,..*/
301 unsigned char dma; /* DMA channel */
302
303 unsigned long state;
304
305 struct net_device *next;
306
307 /* The device initialization function. Called only once. */
308 int (*init)(struct net_device *dev);
309
310 /* ------- Fields preinitialized in Space.c finish here ------- */
311
9356b8fc
ED		 312 /* Net device features */
313 unsigned long features;
314#define NETIF_F_SG 1 /* Scatter/gather IO. */
315#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
316#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
317#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
318#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
319#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
320#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
321#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
322#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
323#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 324#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 325#define NETIF_F_LLTX 4096 /* LockLess TX */
c45d286e 326#define NETIF_F_INTERNAL_STATS 8192 /* Use stats structure in net_device */
7967168c
HX		 327
328 /* Segmentation offload features */
329#define NETIF_F_GSO_SHIFT 16
bcd76111 330#define NETIF_F_GSO_MASK 0xffff0000
7967168c 331#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 332#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 333#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 334#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
335#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 336
78eb8877
HX		 337 /* List of features with software fallbacks. */
338#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
339
8648b305
HX		 340#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
341#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
342
1da177e4
LT		 343 struct net_device *next_sched;
344
345 /* Interface index. Unique device identifier */
346 int ifindex;
347 int iflink;
348
349
350 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 351 struct net_device_stats stats;
1da177e4
LT		 352
353 /* List of functions to handle Wireless Extensions (instead of ioctl).
354 * See <net/iw_handler.h> for details. Jean II */
355 const struct iw_handler_def * wireless_handlers;
356 /* Instance data managed by the core of Wireless Extensions. */
357 struct iw_public_data * wireless_data;
358
76fd8593 359 const struct ethtool_ops *ethtool_ops;
1da177e4
LT		 360
361 /*
362 * This marks the end of the "visible" part of the structure. All
363 * fields hereafter are internal to the system, and may change at
364 * will (read: may be cleaned up at will).
365 */
366
1da177e4 367
b00055aa 368 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 369 unsigned short gflags;
370 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
371 unsigned short padded; /* How much padding added by alloc_netdev() */
372
b00055aa
SR		 373 unsigned char operstate; /* RFC2863 operstate */
374 unsigned char link_mode; /* mapping policy to operstate */
375
1da177e4
LT		 376 unsigned mtu; /* interface MTU value */
377 unsigned short type; /* interface hardware type */
378 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 379
380 struct net_device *master; /* Pointer to master device of a group,
381 * which this device is member of.
382 */
383
384 /* Interface address info. */
a6f9a705 385 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 386 unsigned char addr_len; /* hardware address length */
387 unsigned short dev_id; /* for shared network cards */
388
389 struct dev_mc_list *mc_list; /* Multicast mac addresses */
390 int mc_count; /* Number of installed mcasts */
391 int promiscuity;
392 int allmulti;
393
1da177e4
LT		 394
395 /* Protocol specific pointers */
396
397 void *atalk_ptr; /* AppleTalk link */
398 void *ip_ptr; /* IPv4 specific data */
399 void *dn_ptr; /* DECnet specific data */
400 void *ip6_ptr; /* IPv6 specific data */
401 void *ec_ptr; /* Econet specific data */
402 void *ax25_ptr; /* AX.25 specific data */
403
9356b8fc
ED		 404/*
405 * Cache line mostly used on receive path (including eth_type_trans())
406 */
407 struct list_head poll_list ____cacheline_aligned_in_smp;
408 /* Link to poll list */
409
410 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 411 int quota;
412 int weight;
9356b8fc
ED		 413 unsigned long last_rx; /* Time of last Rx */
414 /* Interface address info used in eth_type_trans() */
415 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
416 because most packets are unicast) */
417
418 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 419
9356b8fc
ED		 420/*
421 * Cache line mostly used on queue transmit path (qdisc)
422 */
423 /* device queue lock */
424 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 425 struct Qdisc *qdisc;
426 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 427 struct list_head qdisc_list;
428 unsigned long tx_queue_len; /* Max frames per queue allowed */
429
f6a78bfc
HX		 430 /* Partially transmitted GSO packet. */
431 struct sk_buff *gso_skb;
432
1da177e4
LT		 433 /* ingress path synchronizer */
434 spinlock_t ingress_lock;
9356b8fc
ED		 435 struct Qdisc *qdisc_ingress;
436
437/*
438 * One part is mostly used on xmit path (device)
439 */
1da177e4 440 /* hard_start_xmit synchronizer */
932ff279 441 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 442 /* cpu id of processor entered to hard_start_xmit or -1,
443 if nobody entered there.
444 */
445 int xmit_lock_owner;
9356b8fc
ED		 446 void *priv; /* pointer to private data */
447 int (*hard_start_xmit) (struct sk_buff *skb,
448 struct net_device *dev);
449 /* These may be needed for future network-power-down code. */
450 unsigned long trans_start; /* Time (in jiffies) of last Tx */
451
452 int watchdog_timeo; /* used by dev_watchdog() */
453 struct timer_list watchdog_timer;
454
455/*
456 * refcnt is a very hot point, so align it on SMP
457 */
1da177e4 458 /* Number of references to this device */
9356b8fc
ED		 459 atomic_t refcnt ____cacheline_aligned_in_smp;
460
1da177e4
LT		 461 /* delayed register/unregister */
462 struct list_head todo_list;
1da177e4
LT		 463 /* device index hash chain */
464 struct hlist_node index_hlist;
465
466 /* register/unregister state machine */
467 enum { NETREG_UNINITIALIZED=0,
b17a7c17 468 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 469 NETREG_UNREGISTERING, /* called unregister_netdevice */
470 NETREG_UNREGISTERED, /* completed unregister todo */
471 NETREG_RELEASED, /* called free_netdev */
472 } reg_state;
473
1da177e4
LT		 474 /* Called after device is detached from network. */
475 void (*uninit)(struct net_device *dev);
476 /* Called after last user reference disappears. */
477 void (*destructor)(struct net_device *dev);
478
479 /* Pointers to interface service routines. */
480 int (*open)(struct net_device *dev);
481 int (*stop)(struct net_device *dev);
1da177e4 482#define HAVE_NETDEV_POLL
1da177e4
LT		 483 int (*hard_header) (struct sk_buff *skb,
484 struct net_device *dev,
485 unsigned short type,
486 void *daddr,
487 void *saddr,
488 unsigned len);
489 int (*rebuild_header)(struct sk_buff *skb);
490#define HAVE_MULTICAST
491 void (*set_multicast_list)(struct net_device *dev);
492#define HAVE_SET_MAC_ADDR
493 int (*set_mac_address)(struct net_device *dev,
494 void *addr);
495#define HAVE_PRIVATE_IOCTL
496 int (*do_ioctl)(struct net_device *dev,
497 struct ifreq *ifr, int cmd);
498#define HAVE_SET_CONFIG
499 int (*set_config)(struct net_device *dev,
500 struct ifmap *map);
501#define HAVE_HEADER_CACHE
502 int (*hard_header_cache)(struct neighbour *neigh,
503 struct hh_cache *hh);
504 void (*header_cache_update)(struct hh_cache *hh,
505 struct net_device *dev,
506 unsigned char * haddr);
507#define HAVE_CHANGE_MTU
508 int (*change_mtu)(struct net_device *dev, int new_mtu);
509
510#define HAVE_TX_TIMEOUT
511 void (*tx_timeout) (struct net_device *dev);
512
513 void (*vlan_rx_register)(struct net_device *dev,
514 struct vlan_group *grp);
515 void (*vlan_rx_add_vid)(struct net_device *dev,
516 unsigned short vid);
517 void (*vlan_rx_kill_vid)(struct net_device *dev,
518 unsigned short vid);
519
520 int (*hard_header_parse)(struct sk_buff *skb,
521 unsigned char *haddr);
522 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
523#ifdef CONFIG_NETPOLL
115c1d6e 524 struct netpoll_info *npinfo;
1da177e4
LT		 525#endif
526#ifdef CONFIG_NET_POLL_CONTROLLER
527 void (*poll_controller)(struct net_device *dev);
528#endif
529
530 /* bridge stuff */
531 struct net_bridge_port *br_port;
532
1da177e4 533 /* class/net/name entry */
43cb76d9 534 struct device dev;
fe9925b5
SH		 535 /* space for optional statistics and wireless sysfs groups */
536 struct attribute_group *sysfs_groups[3];
1da177e4 537};
43cb76d9 538#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 539
540#define NETDEV_ALIGN 32
541#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
542
543static inline void *netdev_priv(struct net_device *dev)
544{
545 return (char *)dev + ((sizeof(struct net_device)
546 + NETDEV_ALIGN_CONST)
547 & ~NETDEV_ALIGN_CONST);
548}
549
550#define SET_MODULE_OWNER(dev) do { } while (0)
551/* Set the sysfs physical device reference for the network logical device
552 * if set prior to registration will cause a symlink during initialization.
553 */
43cb76d9 554#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4
LT		 555
556struct packet_type {
f2ccd8fa
DM		 557 __be16 type; /* This is really htons(ether_type). */
558 struct net_device *dev; /* NULL is wildcarded here */
559 int (*func) (struct sk_buff *,
560 struct net_device *,
561 struct packet_type *,
562 struct net_device *);
576a30eb
HX		 563 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
564 int features);
a430a43d 565 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 566 void *af_packet_priv;
567 struct list_head list;
568};
569
570#include <linux/interrupt.h>
571#include <linux/notifier.h>
572
573extern struct net_device loopback_dev; /* The loopback */
574extern struct net_device *dev_base; /* All devices */
575extern rwlock_t dev_base_lock; /* Device list lock */
576
577extern int netdev_boot_setup_check(struct net_device *dev);
578extern unsigned long netdev_boot_base(const char *prefix, int unit);
579extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
580extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
581extern void dev_add_pack(struct packet_type *pt);
582extern void dev_remove_pack(struct packet_type *pt);
583extern void __dev_remove_pack(struct packet_type *pt);
584
585extern struct net_device *dev_get_by_flags(unsigned short flags,
586 unsigned short mask);
587extern struct net_device *dev_get_by_name(const char *name);
588extern struct net_device *__dev_get_by_name(const char *name);
589extern int dev_alloc_name(struct net_device *dev, const char *name);
590extern int dev_open(struct net_device *dev);
591extern int dev_close(struct net_device *dev);
592extern int dev_queue_xmit(struct sk_buff *skb);
593extern int register_netdevice(struct net_device *dev);
22f8cde5 594extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 595extern void free_netdev(struct net_device *dev);
596extern void synchronize_net(void);
597extern int register_netdevice_notifier(struct notifier_block *nb);
598extern int unregister_netdevice_notifier(struct notifier_block *nb);
599extern int call_netdevice_notifiers(unsigned long val, void *v);
600extern struct net_device *dev_get_by_index(int ifindex);
601extern struct net_device *__dev_get_by_index(int ifindex);
602extern int dev_restart(struct net_device *dev);
603#ifdef CONFIG_NETPOLL_TRAP
604extern int netpoll_trap(void);
605#endif
606
607typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
608extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
609static inline int unregister_gifconf(unsigned int family)
610{
611 return register_gifconf(family, NULL);
612}
613
614/*
615 * Incoming packets are placed on per-cpu queues so that
616 * no locking is needed.
617 */
618
619struct softnet_data
620{
31aa02c5 621 struct net_device *output_queue;
1da177e4
LT		 622 struct sk_buff_head input_pkt_queue;
623 struct list_head poll_list;
1da177e4
LT		 624 struct sk_buff *completion_queue;
625
626 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 627#ifdef CONFIG_NET_DMA
628 struct dma_chan *net_dma;
629#endif
1da177e4
LT		 630};
631
632DECLARE_PER_CPU(struct softnet_data,softnet_data);
633
634#define HAVE_NETIF_QUEUE
635
56079431 636extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 637
638static inline void netif_schedule(struct net_device *dev)
639{
640 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
641 __netif_schedule(dev);
642}
643
644static inline void netif_start_queue(struct net_device *dev)
645{
646 clear_bit(__LINK_STATE_XOFF, &dev->state);
647}
648
649static inline void netif_wake_queue(struct net_device *dev)
650{
651#ifdef CONFIG_NETPOLL_TRAP
652 if (netpoll_trap())
653 return;
654#endif
655 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
656 __netif_schedule(dev);
657}
658
659static inline void netif_stop_queue(struct net_device *dev)
660{
661#ifdef CONFIG_NETPOLL_TRAP
662 if (netpoll_trap())
663 return;
664#endif
665 set_bit(__LINK_STATE_XOFF, &dev->state);
666}
667
668static inline int netif_queue_stopped(const struct net_device *dev)
669{
670 return test_bit(__LINK_STATE_XOFF, &dev->state);
671}
672
673static inline int netif_running(const struct net_device *dev)
674{
675 return test_bit(__LINK_STATE_START, &dev->state);
676}
677
678
679/* Use this variant when it is known for sure that it
680 * is executing from interrupt context.
681 */
682static inline void dev_kfree_skb_irq(struct sk_buff *skb)
683{
684 if (atomic_dec_and_test(&skb->users)) {
685 struct softnet_data *sd;
686 unsigned long flags;
687
688 local_irq_save(flags);
689 sd = &__get_cpu_var(softnet_data);
690 skb->next = sd->completion_queue;
691 sd->completion_queue = skb;
692 raise_softirq_irqoff(NET_TX_SOFTIRQ);
693 local_irq_restore(flags);
694 }
695}
696
697/* Use this variant in places where it could be invoked
698 * either from interrupt or non-interrupt context.
699 */
56079431 700extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 701
702#define HAVE_NETIF_RX 1
703extern int netif_rx(struct sk_buff *skb);
704extern int netif_rx_ni(struct sk_buff *skb);
705#define HAVE_NETIF_RECEIVE_SKB 1
706extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 707extern int dev_valid_name(const char *name);
1da177e4
LT		 708extern int dev_ioctl(unsigned int cmd, void __user *);
709extern int dev_ethtool(struct ifreq *);
710extern unsigned dev_get_flags(const struct net_device *);
711extern int dev_change_flags(struct net_device *, unsigned);
712extern int dev_change_name(struct net_device *, char *);
713extern int dev_set_mtu(struct net_device *, int);
714extern int dev_set_mac_address(struct net_device *,
715 struct sockaddr *);
f6a78bfc
HX		 716extern int dev_hard_start_xmit(struct sk_buff *skb,
717 struct net_device *dev);
1da177e4
LT		 718
719extern void dev_init(void);
720
20380731 721extern int netdev_budget;
1da177e4
LT		 722
723/* Called by rtnetlink.c:rtnl_unlock() */
724extern void netdev_run_todo(void);
725
726static inline void dev_put(struct net_device *dev)
727{
728 atomic_dec(&dev->refcnt);
729}
730
15333061
SH		 731static inline void dev_hold(struct net_device *dev)
732{
733 atomic_inc(&dev->refcnt);
734}
1da177e4
LT		 735
736/* Carrier loss detection, dial on demand. The functions netif_carrier_on
737 * and _off may be called from IRQ context, but it is caller
738 * who is responsible for serialization of these calls.
b00055aa
SR		 739 *
740 * The name carrier is inappropriate, these functions should really be
741 * called netif_lowerlayer_*() because they represent the state of any
742 * kind of lower layer not just hardware media.
1da177e4
LT		 743 */
744
745extern void linkwatch_fire_event(struct net_device *dev);
746
747static inline int netif_carrier_ok(const struct net_device *dev)
748{
749 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
750}
751
752extern void __netdev_watchdog_up(struct net_device *dev);
753
0a242efc 754extern void netif_carrier_on(struct net_device *dev);
1da177e4 755
0a242efc 756extern void netif_carrier_off(struct net_device *dev);
1da177e4 757
b00055aa
SR		 758static inline void netif_dormant_on(struct net_device *dev)
759{
760 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
761 linkwatch_fire_event(dev);
762}
763
764static inline void netif_dormant_off(struct net_device *dev)
765{
766 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
767 linkwatch_fire_event(dev);
768}
769
770static inline int netif_dormant(const struct net_device *dev)
771{
772 return test_bit(__LINK_STATE_DORMANT, &dev->state);
773}
774
775
776static inline int netif_oper_up(const struct net_device *dev) {
777 return (dev->operstate == IF_OPER_UP ||
778 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
779}
780
1da177e4
LT		 781/* Hot-plugging. */
782static inline int netif_device_present(struct net_device *dev)
783{
784 return test_bit(__LINK_STATE_PRESENT, &dev->state);
785}
786
56079431 787extern void netif_device_detach(struct net_device *dev);
1da177e4 788
56079431 789extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 790
791/*
792 * Network interface message level settings
793 */
794#define HAVE_NETIF_MSG 1
795
796enum {
797 NETIF_MSG_DRV = 0x0001,
798 NETIF_MSG_PROBE = 0x0002,
799 NETIF_MSG_LINK = 0x0004,
800 NETIF_MSG_TIMER = 0x0008,
801 NETIF_MSG_IFDOWN = 0x0010,
802 NETIF_MSG_IFUP = 0x0020,
803 NETIF_MSG_RX_ERR = 0x0040,
804 NETIF_MSG_TX_ERR = 0x0080,
805 NETIF_MSG_TX_QUEUED = 0x0100,
806 NETIF_MSG_INTR = 0x0200,
807 NETIF_MSG_TX_DONE = 0x0400,
808 NETIF_MSG_RX_STATUS = 0x0800,
809 NETIF_MSG_PKTDATA = 0x1000,
810 NETIF_MSG_HW = 0x2000,
811 NETIF_MSG_WOL = 0x4000,
812};
813
814#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
815#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
816#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
817#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
818#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
819#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
820#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
821#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
822#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
823#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
824#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
825#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
826#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
827#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
828#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
829
830static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
831{
832 /* use default */
833 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
834 return default_msg_enable_bits;
835 if (debug_value == 0) /* no output */
836 return 0;
837 /* set low N bits */
838 return (1 << debug_value) - 1;
839}
840
0a122576
SH		 841/* Test if receive needs to be scheduled */
842static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 843{
844 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
845}
1da177e4 846
0a122576 847/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 848static inline int netif_rx_schedule_prep(struct net_device *dev)
849{
0a122576 850 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 851}
852
853/* Add interface to tail of rx poll list. This assumes that _prep has
854 * already been called and returned 1.
855 */
856
56079431 857extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 858
859/* Try to reschedule poll. Called by irq handler. */
860
861static inline void netif_rx_schedule(struct net_device *dev)
862{
863 if (netif_rx_schedule_prep(dev))
864 __netif_rx_schedule(dev);
865}
866
d3240312
SH		 867/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
868 * Do not inline this?
869 */
1da177e4
LT		 870static inline int netif_rx_reschedule(struct net_device *dev, int undo)
871{
872 if (netif_rx_schedule_prep(dev)) {
873 unsigned long flags;
d3240312
SH		 874
875 dev->quota += undo;
876
1da177e4 877 local_irq_save(flags);
d3240312
SH		 878 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
879 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 880 local_irq_restore(flags);
881 return 1;
882 }
883 return 0;
884}
885
886/* Remove interface from poll list: it must be in the poll list
887 * on current cpu. This primitive is called by dev->poll(), when
888 * it completes the work. The device cannot be out of poll list at this
889 * moment, it is BUG().
890 */
891static inline void netif_rx_complete(struct net_device *dev)
892{
893 unsigned long flags;
894
895 local_irq_save(flags);
896 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
897 list_del(&dev->poll_list);
898 smp_mb__before_clear_bit();
899 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
900 local_irq_restore(flags);
901}
902
903static inline void netif_poll_disable(struct net_device *dev)
904{
3173c890 905 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 906 /* No hurry. */
3173c890 907 schedule_timeout_interruptible(1);
1da177e4
LT		 908}
909
910static inline void netif_poll_enable(struct net_device *dev)
911{
e44c39bd 912 smp_mb__before_clear_bit();
1da177e4
LT		 913 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
914}
915
916/* same as netif_rx_complete, except that local_irq_save(flags)
917 * has already been issued
918 */
919static inline void __netif_rx_complete(struct net_device *dev)
920{
921 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
922 list_del(&dev->poll_list);
923 smp_mb__before_clear_bit();
924 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
925}
926
932ff279
HX		 927static inline void netif_tx_lock(struct net_device *dev)
928{
929 spin_lock(&dev->_xmit_lock);
930 dev->xmit_lock_owner = smp_processor_id();
931}
932
933static inline void netif_tx_lock_bh(struct net_device *dev)
934{
935 spin_lock_bh(&dev->_xmit_lock);
936 dev->xmit_lock_owner = smp_processor_id();
937}
938
939static inline int netif_tx_trylock(struct net_device *dev)
940{
53c4b2cc
HX		 941 int ok = spin_trylock(&dev->_xmit_lock);
942 if (likely(ok))
932ff279 943 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 944 return ok;
932ff279
HX		 945}
946
947static inline void netif_tx_unlock(struct net_device *dev)
948{
949 dev->xmit_lock_owner = -1;
950 spin_unlock(&dev->_xmit_lock);
951}
952
953static inline void netif_tx_unlock_bh(struct net_device *dev)
954{
955 dev->xmit_lock_owner = -1;
956 spin_unlock_bh(&dev->_xmit_lock);
957}
958
1da177e4
LT		 959static inline void netif_tx_disable(struct net_device *dev)
960{
932ff279 961 netif_tx_lock_bh(dev);
1da177e4 962 netif_stop_queue(dev);
932ff279 963 netif_tx_unlock_bh(dev);
1da177e4
LT		 964}
965
966/* These functions live elsewhere (drivers/net/net_init.c, but related) */
967
968extern void ether_setup(struct net_device *dev);
969
970/* Support for loadable net-drivers */
971extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
972 void (*setup)(struct net_device *));
973extern int register_netdev(struct net_device *dev);
974extern void unregister_netdev(struct net_device *dev);
975/* Functions used for multicast support */
976extern void dev_mc_upload(struct net_device *dev);
977extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
978extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
979extern void dev_mc_discard(struct net_device *dev);
980extern void dev_set_promiscuity(struct net_device *dev, int inc);
981extern void dev_set_allmulti(struct net_device *dev, int inc);
982extern void netdev_state_change(struct net_device *dev);
d8a33ac4 983extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 984/* Load a device via the kmod */
985extern void dev_load(const char *name);
986extern void dev_mcast_init(void);
987extern int netdev_max_backlog;
988extern int weight_p;
989extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 990extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 991extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 992#ifdef CONFIG_BUG
993extern void netdev_rx_csum_fault(struct net_device *dev);
994#else
995static inline void netdev_rx_csum_fault(struct net_device *dev)
996{
997}
998#endif
1da177e4
LT		 999/* rx skb timestamps */
1000extern void net_enable_timestamp(void);
1001extern void net_disable_timestamp(void);
1002
20380731
ACM		 1003#ifdef CONFIG_PROC_FS
1004extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1005extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1006extern void dev_seq_stop(struct seq_file *seq, void *v);
1007#endif
1008
1009extern void linkwatch_run_queue(void);
1010
bcd76111 1011static inline int net_gso_ok(int features, int gso_type)
576a30eb 1012{
bcd76111 1013 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1014 return (features & feature) == feature;
576a30eb
HX		 1015}
1016
bcd76111
HX		 1017static inline int skb_gso_ok(struct sk_buff *skb, int features)
1018{
a430a43d 1019 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1020}
1021
7967168c
HX		 1022static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1023{
a430a43d
HX		 1024 return skb_is_gso(skb) &&
1025 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1026 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1027}
1028
7ea49ed7 1029/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1030 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1031 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1032 */
1033static inline int skb_bond_should_drop(struct sk_buff *skb)
1034{
1035 struct net_device *dev = skb->dev;
1036 struct net_device *master = dev->master;
1037
1038 if (master &&
1039 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1040 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1041 skb->protocol == __constant_htons(ETH_P_ARP))
1042 return 0;
1043
7ea49ed7
DM		 1044 if (master->priv_flags & IFF_MASTER_ALB) {
1045 if (skb->pkt_type != PACKET_BROADCAST &&
1046 skb->pkt_type != PACKET_MULTICAST)
1047 return 0;
1048 }
1049 if (master->priv_flags & IFF_MASTER_8023AD &&
1050 skb->protocol == __constant_htons(ETH_P_SLOW))
1051 return 0;
1052
1053 return 1;
1054 }
1055 return 0;
1056}
1057
1da177e4
LT		 1058#endif /* __KERNEL__ */
1059
1060#endif /* _LINUX_DEV_H */
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