]> bbs.cooldavid.org Git - net-next-2.6.git/blame - include/linux/netdevice.h
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[NET]: dev_mcast: switch to generic net_device address lists
[net-next-2.6.git] / include / linux / netdevice.h
CommitLineData
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
bf742482
PM		 180struct dev_addr_list
181{
182 struct dev_addr_list *next;
183 u8 da_addr[MAX_ADDR_LEN];
184 u8 da_addrlen;
185 int da_users;
186 int da_gusers;
187};
1da177e4
LT		 188
189/*
190 * We tag multicasts with these structures.
191 */
3fba5a8b
PM		 192
193#define dev_mc_list dev_addr_list
194#define dmi_addr da_addr
195#define dmi_addrlen da_addrlen
196#define dmi_users da_users
197#define dmi_gusers da_gusers
1da177e4
LT		 198
199struct hh_cache
200{
201 struct hh_cache *hh_next; /* Next entry */
202 atomic_t hh_refcnt; /* number of users */
f0490980
ED		 203/*
204 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
205 * cache line on SMP.
206 * They are mostly read, but hh_refcnt may be changed quite frequently,
207 * incurring cache line ping pongs.
208 */
209 __be16 hh_type ____cacheline_aligned_in_smp;
210 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 211 * NOTE: For VLANs, this will be the
212 * encapuslated type. --BLG
213 */
d5c42c0e 214 u16 hh_len; /* length of header */
1da177e4 215 int (*hh_output)(struct sk_buff *skb);
3644f0ce 216 seqlock_t hh_lock;
1da177e4
LT		 217
218 /* cached hardware header; allow for machine alignment needs. */
219#define HH_DATA_MOD 16
220#define HH_DATA_OFF(__len) \
5ba0eac6 221 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 222#define HH_DATA_ALIGN(__len) \
223 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
224 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
225};
226
227/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
228 * Alternative is:
229 * dev->hard_header_len ? (dev->hard_header_len +
230 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
231 *
232 * We could use other alignment values, but we must maintain the
233 * relationship HH alignment <= LL alignment.
234 */
235#define LL_RESERVED_SPACE(dev) \
236 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
237#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
238 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
239
240/* These flag bits are private to the generic network queueing
241 * layer, they may not be explicitly referenced by any other
242 * code.
243 */
244
245enum netdev_state_t
246{
247 __LINK_STATE_XOFF=0,
248 __LINK_STATE_START,
249 __LINK_STATE_PRESENT,
250 __LINK_STATE_SCHED,
251 __LINK_STATE_NOCARRIER,
252 __LINK_STATE_RX_SCHED,
b00055aa
SR		 253 __LINK_STATE_LINKWATCH_PENDING,
254 __LINK_STATE_DORMANT,
48d83325 255 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 256};
257
258
259/*
260 * This structure holds at boot time configured netdevice settings. They
261 * are then used in the device probing.
262 */
263struct netdev_boot_setup {
264 char name[IFNAMSIZ];
265 struct ifmap map;
266};
267#define NETDEV_BOOT_SETUP_MAX 8
268
20380731 269extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 270
271/*
272 * The DEVICE structure.
273 * Actually, this whole structure is a big mistake. It mixes I/O
274 * data with strictly "high-level" data, and it has to know about
275 * almost every data structure used in the INET module.
276 *
277 * FIXME: cleanup struct net_device such that network protocol info
278 * moves out.
279 */
280
281struct net_device
282{
283
284 /*
285 * This is the first field of the "visible" part of this structure
286 * (i.e. as seen by users in the "Space.c" file). It is the name
287 * the interface.
288 */
289 char name[IFNAMSIZ];
9356b8fc
ED		 290 /* device name hash chain */
291 struct hlist_node name_hlist;
1da177e4
LT		 292
293 /*
294 * I/O specific fields
295 * FIXME: Merge these and struct ifmap into one
296 */
297 unsigned long mem_end; /* shared mem end */
298 unsigned long mem_start; /* shared mem start */
299 unsigned long base_addr; /* device I/O address */
300 unsigned int irq; /* device IRQ number */
301
302 /*
303 * Some hardware also needs these fields, but they are not
304 * part of the usual set specified in Space.c.
305 */
306
307 unsigned char if_port; /* Selectable AUI, TP,..*/
308 unsigned char dma; /* DMA channel */
309
310 unsigned long state;
311
7562f876 312 struct list_head dev_list;
1da177e4
LT		 313
314 /* The device initialization function. Called only once. */
315 int (*init)(struct net_device *dev);
316
317 /* ------- Fields preinitialized in Space.c finish here ------- */
318
9356b8fc
ED		 319 /* Net device features */
320 unsigned long features;
321#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 322#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED		 323#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
324#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 325#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED		 326#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
327#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
328#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
329#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
330#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
331#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 332#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 333#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 334
335 /* Segmentation offload features */
336#define NETIF_F_GSO_SHIFT 16
bcd76111 337#define NETIF_F_GSO_MASK 0xffff0000
7967168c 338#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 339#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 340#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 341#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
342#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 343
78eb8877
HX		 344 /* List of features with software fallbacks. */
345#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
346
d212f87b 347
8648b305 348#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH		 349#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
350#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
351#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 352
1da177e4
LT		 353 struct net_device *next_sched;
354
355 /* Interface index. Unique device identifier */
356 int ifindex;
357 int iflink;
358
359
360 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 361 struct net_device_stats stats;
1da177e4 362
b86e0280 363#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT		 364 /* List of functions to handle Wireless Extensions (instead of ioctl).
365 * See <net/iw_handler.h> for details. Jean II */
366 const struct iw_handler_def * wireless_handlers;
367 /* Instance data managed by the core of Wireless Extensions. */
368 struct iw_public_data * wireless_data;
b86e0280 369#endif
76fd8593 370 const struct ethtool_ops *ethtool_ops;
1da177e4
LT		 371
372 /*
373 * This marks the end of the "visible" part of the structure. All
374 * fields hereafter are internal to the system, and may change at
375 * will (read: may be cleaned up at will).
376 */
377
1da177e4 378
b00055aa 379 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 380 unsigned short gflags;
381 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
382 unsigned short padded; /* How much padding added by alloc_netdev() */
383
b00055aa
SR		 384 unsigned char operstate; /* RFC2863 operstate */
385 unsigned char link_mode; /* mapping policy to operstate */
386
1da177e4
LT		 387 unsigned mtu; /* interface MTU value */
388 unsigned short type; /* interface hardware type */
389 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 390
391 struct net_device *master; /* Pointer to master device of a group,
392 * which this device is member of.
393 */
394
395 /* Interface address info. */
a6f9a705 396 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 397 unsigned char addr_len; /* hardware address length */
398 unsigned short dev_id; /* for shared network cards */
399
3fba5a8b 400 struct dev_addr_list *mc_list; /* Multicast mac addresses */
1da177e4
LT		 401 int mc_count; /* Number of installed mcasts */
402 int promiscuity;
403 int allmulti;
404
1da177e4
LT		 405
406 /* Protocol specific pointers */
407
408 void *atalk_ptr; /* AppleTalk link */
409 void *ip_ptr; /* IPv4 specific data */
410 void *dn_ptr; /* DECnet specific data */
411 void *ip6_ptr; /* IPv6 specific data */
412 void *ec_ptr; /* Econet specific data */
413 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB		 414 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
415 assign before registering */
1da177e4 416
9356b8fc
ED		 417/*
418 * Cache line mostly used on receive path (including eth_type_trans())
419 */
420 struct list_head poll_list ____cacheline_aligned_in_smp;
421 /* Link to poll list */
422
423 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 424 int quota;
425 int weight;
9356b8fc
ED		 426 unsigned long last_rx; /* Time of last Rx */
427 /* Interface address info used in eth_type_trans() */
428 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
429 because most packets are unicast) */
430
431 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 432
9356b8fc
ED		 433/*
434 * Cache line mostly used on queue transmit path (qdisc)
435 */
436 /* device queue lock */
437 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 438 struct Qdisc *qdisc;
439 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 440 struct list_head qdisc_list;
441 unsigned long tx_queue_len; /* Max frames per queue allowed */
442
f6a78bfc
HX		 443 /* Partially transmitted GSO packet. */
444 struct sk_buff *gso_skb;
445
1da177e4
LT		 446 /* ingress path synchronizer */
447 spinlock_t ingress_lock;
9356b8fc
ED		 448 struct Qdisc *qdisc_ingress;
449
450/*
451 * One part is mostly used on xmit path (device)
452 */
1da177e4 453 /* hard_start_xmit synchronizer */
932ff279 454 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 455 /* cpu id of processor entered to hard_start_xmit or -1,
456 if nobody entered there.
457 */
458 int xmit_lock_owner;
9356b8fc
ED		 459 void *priv; /* pointer to private data */
460 int (*hard_start_xmit) (struct sk_buff *skb,
461 struct net_device *dev);
462 /* These may be needed for future network-power-down code. */
463 unsigned long trans_start; /* Time (in jiffies) of last Tx */
464
465 int watchdog_timeo; /* used by dev_watchdog() */
466 struct timer_list watchdog_timer;
467
468/*
469 * refcnt is a very hot point, so align it on SMP
470 */
1da177e4 471 /* Number of references to this device */
9356b8fc
ED		 472 atomic_t refcnt ____cacheline_aligned_in_smp;
473
1da177e4
LT		 474 /* delayed register/unregister */
475 struct list_head todo_list;
1da177e4
LT		 476 /* device index hash chain */
477 struct hlist_node index_hlist;
478
572a103d
HX		 479 struct net_device *link_watch_next;
480
1da177e4
LT		 481 /* register/unregister state machine */
482 enum { NETREG_UNINITIALIZED=0,
b17a7c17 483 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 484 NETREG_UNREGISTERING, /* called unregister_netdevice */
485 NETREG_UNREGISTERED, /* completed unregister todo */
486 NETREG_RELEASED, /* called free_netdev */
487 } reg_state;
488
1da177e4
LT		 489 /* Called after device is detached from network. */
490 void (*uninit)(struct net_device *dev);
491 /* Called after last user reference disappears. */
492 void (*destructor)(struct net_device *dev);
493
494 /* Pointers to interface service routines. */
495 int (*open)(struct net_device *dev);
496 int (*stop)(struct net_device *dev);
1da177e4 497#define HAVE_NETDEV_POLL
1da177e4
LT		 498 int (*hard_header) (struct sk_buff *skb,
499 struct net_device *dev,
500 unsigned short type,
501 void *daddr,
502 void *saddr,
503 unsigned len);
504 int (*rebuild_header)(struct sk_buff *skb);
505#define HAVE_MULTICAST
506 void (*set_multicast_list)(struct net_device *dev);
507#define HAVE_SET_MAC_ADDR
508 int (*set_mac_address)(struct net_device *dev,
509 void *addr);
510#define HAVE_PRIVATE_IOCTL
511 int (*do_ioctl)(struct net_device *dev,
512 struct ifreq *ifr, int cmd);
513#define HAVE_SET_CONFIG
514 int (*set_config)(struct net_device *dev,
515 struct ifmap *map);
516#define HAVE_HEADER_CACHE
517 int (*hard_header_cache)(struct neighbour *neigh,
518 struct hh_cache *hh);
519 void (*header_cache_update)(struct hh_cache *hh,
520 struct net_device *dev,
521 unsigned char * haddr);
522#define HAVE_CHANGE_MTU
523 int (*change_mtu)(struct net_device *dev, int new_mtu);
524
525#define HAVE_TX_TIMEOUT
526 void (*tx_timeout) (struct net_device *dev);
527
528 void (*vlan_rx_register)(struct net_device *dev,
529 struct vlan_group *grp);
530 void (*vlan_rx_add_vid)(struct net_device *dev,
531 unsigned short vid);
532 void (*vlan_rx_kill_vid)(struct net_device *dev,
533 unsigned short vid);
534
535 int (*hard_header_parse)(struct sk_buff *skb,
536 unsigned char *haddr);
537 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
538#ifdef CONFIG_NETPOLL
115c1d6e 539 struct netpoll_info *npinfo;
1da177e4
LT		 540#endif
541#ifdef CONFIG_NET_POLL_CONTROLLER
542 void (*poll_controller)(struct net_device *dev);
543#endif
544
545 /* bridge stuff */
546 struct net_bridge_port *br_port;
547
1da177e4 548 /* class/net/name entry */
43cb76d9 549 struct device dev;
fe9925b5
SH		 550 /* space for optional statistics and wireless sysfs groups */
551 struct attribute_group *sysfs_groups[3];
38f7b870
PM		 552
553 /* rtnetlink link ops */
554 const struct rtnl_link_ops *rtnl_link_ops;
1da177e4 555};
43cb76d9 556#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 557
558#define NETDEV_ALIGN 32
559#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
560
6472ce60 561static inline void *netdev_priv(const struct net_device *dev)
1da177e4
LT		 562{
563 return (char *)dev + ((sizeof(struct net_device)
564 + NETDEV_ALIGN_CONST)
565 & ~NETDEV_ALIGN_CONST);
566}
567
568#define SET_MODULE_OWNER(dev) do { } while (0)
569/* Set the sysfs physical device reference for the network logical device
570 * if set prior to registration will cause a symlink during initialization.
571 */
43cb76d9 572#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4
LT		 573
574struct packet_type {
f2ccd8fa
DM		 575 __be16 type; /* This is really htons(ether_type). */
576 struct net_device *dev; /* NULL is wildcarded here */
577 int (*func) (struct sk_buff *,
578 struct net_device *,
579 struct packet_type *,
580 struct net_device *);
576a30eb
HX		 581 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
582 int features);
a430a43d 583 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 584 void *af_packet_priv;
585 struct list_head list;
586};
587
588#include <linux/interrupt.h>
589#include <linux/notifier.h>
590
591extern struct net_device loopback_dev; /* The loopback */
7562f876 592extern struct list_head dev_base_head; /* All devices */
1da177e4
LT		 593extern rwlock_t dev_base_lock; /* Device list lock */
594
7562f876
PE		 595#define for_each_netdev(d) \
596 list_for_each_entry(d, &dev_base_head, dev_list)
597#define for_each_netdev_safe(d, n) \
598 list_for_each_entry_safe(d, n, &dev_base_head, dev_list)
599#define for_each_netdev_continue(d) \
600 list_for_each_entry_continue(d, &dev_base_head, dev_list)
601#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
602
603static inline struct net_device *next_net_device(struct net_device *dev)
604{
605 struct list_head *lh;
606
607 lh = dev->dev_list.next;
608 return lh == &dev_base_head ? NULL : net_device_entry(lh);
609}
610
611static inline struct net_device *first_net_device(void)
612{
613 return list_empty(&dev_base_head) ? NULL :
614 net_device_entry(dev_base_head.next);
615}
616
1da177e4
LT		 617extern int netdev_boot_setup_check(struct net_device *dev);
618extern unsigned long netdev_boot_base(const char *prefix, int unit);
619extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
620extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
4e9cac2b 621extern struct net_device *__dev_getfirstbyhwtype(unsigned short type);
1da177e4
LT		 622extern void dev_add_pack(struct packet_type *pt);
623extern void dev_remove_pack(struct packet_type *pt);
624extern void __dev_remove_pack(struct packet_type *pt);
625
626extern struct net_device *dev_get_by_flags(unsigned short flags,
627 unsigned short mask);
628extern struct net_device *dev_get_by_name(const char *name);
629extern struct net_device *__dev_get_by_name(const char *name);
630extern int dev_alloc_name(struct net_device *dev, const char *name);
631extern int dev_open(struct net_device *dev);
632extern int dev_close(struct net_device *dev);
633extern int dev_queue_xmit(struct sk_buff *skb);
634extern int register_netdevice(struct net_device *dev);
22f8cde5 635extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 636extern void free_netdev(struct net_device *dev);
637extern void synchronize_net(void);
638extern int register_netdevice_notifier(struct notifier_block *nb);
639extern int unregister_netdevice_notifier(struct notifier_block *nb);
640extern int call_netdevice_notifiers(unsigned long val, void *v);
641extern struct net_device *dev_get_by_index(int ifindex);
642extern struct net_device *__dev_get_by_index(int ifindex);
643extern int dev_restart(struct net_device *dev);
644#ifdef CONFIG_NETPOLL_TRAP
645extern int netpoll_trap(void);
646#endif
647
648typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
649extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
650static inline int unregister_gifconf(unsigned int family)
651{
652 return register_gifconf(family, NULL);
653}
654
655/*
656 * Incoming packets are placed on per-cpu queues so that
657 * no locking is needed.
658 */
659
660struct softnet_data
661{
31aa02c5 662 struct net_device *output_queue;
1da177e4
LT		 663 struct sk_buff_head input_pkt_queue;
664 struct list_head poll_list;
1da177e4
LT		 665 struct sk_buff *completion_queue;
666
667 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 668#ifdef CONFIG_NET_DMA
669 struct dma_chan *net_dma;
670#endif
1da177e4
LT		 671};
672
673DECLARE_PER_CPU(struct softnet_data,softnet_data);
674
675#define HAVE_NETIF_QUEUE
676
56079431 677extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 678
679static inline void netif_schedule(struct net_device *dev)
680{
681 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
682 __netif_schedule(dev);
683}
684
685static inline void netif_start_queue(struct net_device *dev)
686{
687 clear_bit(__LINK_STATE_XOFF, &dev->state);
688}
689
690static inline void netif_wake_queue(struct net_device *dev)
691{
692#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS		 693 if (netpoll_trap()) {
694 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 695 return;
5f286e11 696 }
1da177e4
LT		 697#endif
698 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
699 __netif_schedule(dev);
700}
701
702static inline void netif_stop_queue(struct net_device *dev)
703{
1da177e4
LT		 704 set_bit(__LINK_STATE_XOFF, &dev->state);
705}
706
707static inline int netif_queue_stopped(const struct net_device *dev)
708{
709 return test_bit(__LINK_STATE_XOFF, &dev->state);
710}
711
712static inline int netif_running(const struct net_device *dev)
713{
714 return test_bit(__LINK_STATE_START, &dev->state);
715}
716
717
718/* Use this variant when it is known for sure that it
719 * is executing from interrupt context.
720 */
721static inline void dev_kfree_skb_irq(struct sk_buff *skb)
722{
723 if (atomic_dec_and_test(&skb->users)) {
724 struct softnet_data *sd;
725 unsigned long flags;
726
727 local_irq_save(flags);
728 sd = &__get_cpu_var(softnet_data);
729 skb->next = sd->completion_queue;
730 sd->completion_queue = skb;
731 raise_softirq_irqoff(NET_TX_SOFTIRQ);
732 local_irq_restore(flags);
733 }
734}
735
736/* Use this variant in places where it could be invoked
737 * either from interrupt or non-interrupt context.
738 */
56079431 739extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 740
741#define HAVE_NETIF_RX 1
742extern int netif_rx(struct sk_buff *skb);
743extern int netif_rx_ni(struct sk_buff *skb);
744#define HAVE_NETIF_RECEIVE_SKB 1
745extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 746extern int dev_valid_name(const char *name);
1da177e4
LT		 747extern int dev_ioctl(unsigned int cmd, void __user *);
748extern int dev_ethtool(struct ifreq *);
749extern unsigned dev_get_flags(const struct net_device *);
750extern int dev_change_flags(struct net_device *, unsigned);
751extern int dev_change_name(struct net_device *, char *);
752extern int dev_set_mtu(struct net_device *, int);
753extern int dev_set_mac_address(struct net_device *,
754 struct sockaddr *);
f6a78bfc
HX		 755extern int dev_hard_start_xmit(struct sk_buff *skb,
756 struct net_device *dev);
1da177e4
LT		 757
758extern void dev_init(void);
759
20380731 760extern int netdev_budget;
1da177e4
LT		 761
762/* Called by rtnetlink.c:rtnl_unlock() */
763extern void netdev_run_todo(void);
764
765static inline void dev_put(struct net_device *dev)
766{
767 atomic_dec(&dev->refcnt);
768}
769
15333061
SH		 770static inline void dev_hold(struct net_device *dev)
771{
772 atomic_inc(&dev->refcnt);
773}
1da177e4
LT		 774
775/* Carrier loss detection, dial on demand. The functions netif_carrier_on
776 * and _off may be called from IRQ context, but it is caller
777 * who is responsible for serialization of these calls.
b00055aa
SR		 778 *
779 * The name carrier is inappropriate, these functions should really be
780 * called netif_lowerlayer_*() because they represent the state of any
781 * kind of lower layer not just hardware media.
1da177e4
LT		 782 */
783
784extern void linkwatch_fire_event(struct net_device *dev);
785
786static inline int netif_carrier_ok(const struct net_device *dev)
787{
788 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
789}
790
791extern void __netdev_watchdog_up(struct net_device *dev);
792
0a242efc 793extern void netif_carrier_on(struct net_device *dev);
1da177e4 794
0a242efc 795extern void netif_carrier_off(struct net_device *dev);
1da177e4 796
b00055aa
SR		 797static inline void netif_dormant_on(struct net_device *dev)
798{
799 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
800 linkwatch_fire_event(dev);
801}
802
803static inline void netif_dormant_off(struct net_device *dev)
804{
805 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
806 linkwatch_fire_event(dev);
807}
808
809static inline int netif_dormant(const struct net_device *dev)
810{
811 return test_bit(__LINK_STATE_DORMANT, &dev->state);
812}
813
814
815static inline int netif_oper_up(const struct net_device *dev) {
816 return (dev->operstate == IF_OPER_UP ||
817 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
818}
819
1da177e4
LT		 820/* Hot-plugging. */
821static inline int netif_device_present(struct net_device *dev)
822{
823 return test_bit(__LINK_STATE_PRESENT, &dev->state);
824}
825
56079431 826extern void netif_device_detach(struct net_device *dev);
1da177e4 827
56079431 828extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 829
830/*
831 * Network interface message level settings
832 */
833#define HAVE_NETIF_MSG 1
834
835enum {
836 NETIF_MSG_DRV = 0x0001,
837 NETIF_MSG_PROBE = 0x0002,
838 NETIF_MSG_LINK = 0x0004,
839 NETIF_MSG_TIMER = 0x0008,
840 NETIF_MSG_IFDOWN = 0x0010,
841 NETIF_MSG_IFUP = 0x0020,
842 NETIF_MSG_RX_ERR = 0x0040,
843 NETIF_MSG_TX_ERR = 0x0080,
844 NETIF_MSG_TX_QUEUED = 0x0100,
845 NETIF_MSG_INTR = 0x0200,
846 NETIF_MSG_TX_DONE = 0x0400,
847 NETIF_MSG_RX_STATUS = 0x0800,
848 NETIF_MSG_PKTDATA = 0x1000,
849 NETIF_MSG_HW = 0x2000,
850 NETIF_MSG_WOL = 0x4000,
851};
852
853#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
854#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
855#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
856#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
857#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
858#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
859#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
860#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
861#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
862#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
863#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
864#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
865#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
866#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
867#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
868
869static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
870{
871 /* use default */
872 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
873 return default_msg_enable_bits;
874 if (debug_value == 0) /* no output */
875 return 0;
876 /* set low N bits */
877 return (1 << debug_value) - 1;
878}
879
0a122576
SH		 880/* Test if receive needs to be scheduled */
881static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 882{
883 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
884}
1da177e4 885
0a122576 886/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 887static inline int netif_rx_schedule_prep(struct net_device *dev)
888{
0a122576 889 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 890}
891
892/* Add interface to tail of rx poll list. This assumes that _prep has
893 * already been called and returned 1.
894 */
895
56079431 896extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 897
898/* Try to reschedule poll. Called by irq handler. */
899
900static inline void netif_rx_schedule(struct net_device *dev)
901{
902 if (netif_rx_schedule_prep(dev))
903 __netif_rx_schedule(dev);
904}
905
d3240312
SH		 906/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
907 * Do not inline this?
908 */
1da177e4
LT		 909static inline int netif_rx_reschedule(struct net_device *dev, int undo)
910{
911 if (netif_rx_schedule_prep(dev)) {
912 unsigned long flags;
d3240312
SH		 913
914 dev->quota += undo;
915
1da177e4 916 local_irq_save(flags);
d3240312
SH		 917 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
918 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 919 local_irq_restore(flags);
920 return 1;
921 }
922 return 0;
923}
924
b0ba6667
HX		 925/* same as netif_rx_complete, except that local_irq_save(flags)
926 * has already been issued
927 */
928static inline void __netif_rx_complete(struct net_device *dev)
929{
930 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
931 list_del(&dev->poll_list);
932 smp_mb__before_clear_bit();
933 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
934}
935
1da177e4
LT		 936/* Remove interface from poll list: it must be in the poll list
937 * on current cpu. This primitive is called by dev->poll(), when
938 * it completes the work. The device cannot be out of poll list at this
939 * moment, it is BUG().
940 */
941static inline void netif_rx_complete(struct net_device *dev)
942{
943 unsigned long flags;
944
945 local_irq_save(flags);
b0ba6667 946 __netif_rx_complete(dev);
1da177e4
LT		 947 local_irq_restore(flags);
948}
949
950static inline void netif_poll_disable(struct net_device *dev)
951{
3173c890 952 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 953 /* No hurry. */
3173c890 954 schedule_timeout_interruptible(1);
1da177e4
LT		 955}
956
957static inline void netif_poll_enable(struct net_device *dev)
958{
e44c39bd 959 smp_mb__before_clear_bit();
1da177e4 960 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
1da177e4
LT		 961}
962
932ff279
HX		 963static inline void netif_tx_lock(struct net_device *dev)
964{
965 spin_lock(&dev->_xmit_lock);
966 dev->xmit_lock_owner = smp_processor_id();
967}
968
969static inline void netif_tx_lock_bh(struct net_device *dev)
970{
971 spin_lock_bh(&dev->_xmit_lock);
972 dev->xmit_lock_owner = smp_processor_id();
973}
974
975static inline int netif_tx_trylock(struct net_device *dev)
976{
53c4b2cc
HX		 977 int ok = spin_trylock(&dev->_xmit_lock);
978 if (likely(ok))
932ff279 979 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 980 return ok;
932ff279
HX		 981}
982
983static inline void netif_tx_unlock(struct net_device *dev)
984{
985 dev->xmit_lock_owner = -1;
986 spin_unlock(&dev->_xmit_lock);
987}
988
989static inline void netif_tx_unlock_bh(struct net_device *dev)
990{
991 dev->xmit_lock_owner = -1;
992 spin_unlock_bh(&dev->_xmit_lock);
993}
994
1da177e4
LT		 995static inline void netif_tx_disable(struct net_device *dev)
996{
932ff279 997 netif_tx_lock_bh(dev);
1da177e4 998 netif_stop_queue(dev);
932ff279 999 netif_tx_unlock_bh(dev);
1da177e4
LT		 1000}
1001
1002/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1003
1004extern void ether_setup(struct net_device *dev);
1005
1006/* Support for loadable net-drivers */
1007extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
1008 void (*setup)(struct net_device *));
1009extern int register_netdev(struct net_device *dev);
1010extern void unregister_netdev(struct net_device *dev);
1011/* Functions used for multicast support */
1012extern void dev_mc_upload(struct net_device *dev);
1013extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1014extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
1015extern void dev_mc_discard(struct net_device *dev);
bf742482
PM		 1016extern int __dev_addr_delete(struct dev_addr_list **list, void *addr, int alen, int all);
1017extern int __dev_addr_add(struct dev_addr_list **list, void *addr, int alen, int newonly);
1018extern void __dev_addr_discard(struct dev_addr_list **list);
1da177e4
LT		 1019extern void dev_set_promiscuity(struct net_device *dev, int inc);
1020extern void dev_set_allmulti(struct net_device *dev, int inc);
1021extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1022extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 1023/* Load a device via the kmod */
1024extern void dev_load(const char *name);
1025extern void dev_mcast_init(void);
1026extern int netdev_max_backlog;
1027extern int weight_p;
1028extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1029extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1030extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1031#ifdef CONFIG_BUG
1032extern void netdev_rx_csum_fault(struct net_device *dev);
1033#else
1034static inline void netdev_rx_csum_fault(struct net_device *dev)
1035{
1036}
1037#endif
1da177e4
LT		 1038/* rx skb timestamps */
1039extern void net_enable_timestamp(void);
1040extern void net_disable_timestamp(void);
1041
20380731
ACM		 1042#ifdef CONFIG_PROC_FS
1043extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1044extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1045extern void dev_seq_stop(struct seq_file *seq, void *v);
1046#endif
1047
1048extern void linkwatch_run_queue(void);
1049
bcd76111 1050static inline int net_gso_ok(int features, int gso_type)
576a30eb 1051{
bcd76111 1052 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1053 return (features & feature) == feature;
576a30eb
HX		 1054}
1055
bcd76111
HX		 1056static inline int skb_gso_ok(struct sk_buff *skb, int features)
1057{
a430a43d 1058 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1059}
1060
7967168c
HX		 1061static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1062{
a430a43d
HX		 1063 return skb_is_gso(skb) &&
1064 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1065 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1066}
1067
7ea49ed7 1068/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1069 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1070 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1071 */
1072static inline int skb_bond_should_drop(struct sk_buff *skb)
1073{
1074 struct net_device *dev = skb->dev;
1075 struct net_device *master = dev->master;
1076
1077 if (master &&
1078 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1079 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1080 skb->protocol == __constant_htons(ETH_P_ARP))
1081 return 0;
1082
7ea49ed7
DM		 1083 if (master->priv_flags & IFF_MASTER_ALB) {
1084 if (skb->pkt_type != PACKET_BROADCAST &&
1085 skb->pkt_type != PACKET_MULTICAST)
1086 return 0;
1087 }
1088 if (master->priv_flags & IFF_MASTER_8023AD &&
1089 skb->protocol == __constant_htons(ETH_P_SLOW))
1090 return 0;
1091
1092 return 1;
1093 }
1094 return 0;
1095}
1096
1da177e4
LT		 1097#endif /* __KERNEL__ */
1098
1099#endif /* _LINUX_DEV_H */
Clone of davem's net-next-2.6 tree