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[BRIDGE]: Disable SG/GSO if TX checksum is off
[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__
33#include <asm/atomic.h>
34#include <asm/cache.h>
35#include <asm/byteorder.h>
36
1da177e4
LT		 37#include <linux/device.h>
38#include <linux/percpu.h>
db217334 39#include <linux/dmaengine.h>
1da177e4
LT		 40
41struct divert_blk;
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
70#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
71
72#endif
73
74#define MAX_ADDR_LEN 32 /* Largest hardware address length */
75
76/* Driver transmit return codes */
77#define NETDEV_TX_OK 0 /* driver took care of packet */
78#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
79#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
80
81/*
82 * Compute the worst case header length according to the protocols
83 * used.
84 */
85
86#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
87#define LL_MAX_HEADER 32
88#else
89#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
90#define LL_MAX_HEADER 96
91#else
92#define LL_MAX_HEADER 48
93#endif
94#endif
95
96#if !defined(CONFIG_NET_IPIP) && \
97 !defined(CONFIG_IPV6) && !defined(CONFIG_IPV6_MODULE)
98#define MAX_HEADER LL_MAX_HEADER
99#else
100#define MAX_HEADER (LL_MAX_HEADER + 48)
101#endif
102
103/*
104 * Network device statistics. Akin to the 2.0 ether stats but
105 * with byte counters.
106 */
107
108struct net_device_stats
109{
110 unsigned long rx_packets; /* total packets received */
111 unsigned long tx_packets; /* total packets transmitted */
112 unsigned long rx_bytes; /* total bytes received */
113 unsigned long tx_bytes; /* total bytes transmitted */
114 unsigned long rx_errors; /* bad packets received */
115 unsigned long tx_errors; /* packet transmit problems */
116 unsigned long rx_dropped; /* no space in linux buffers */
117 unsigned long tx_dropped; /* no space available in linux */
118 unsigned long multicast; /* multicast packets received */
119 unsigned long collisions;
120
121 /* detailed rx_errors: */
122 unsigned long rx_length_errors;
123 unsigned long rx_over_errors; /* receiver ring buff overflow */
124 unsigned long rx_crc_errors; /* recved pkt with crc error */
125 unsigned long rx_frame_errors; /* recv'd frame alignment error */
126 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
127 unsigned long rx_missed_errors; /* receiver missed packet */
128
129 /* detailed tx_errors */
130 unsigned long tx_aborted_errors;
131 unsigned long tx_carrier_errors;
132 unsigned long tx_fifo_errors;
133 unsigned long tx_heartbeat_errors;
134 unsigned long tx_window_errors;
135
136 /* for cslip etc */
137 unsigned long rx_compressed;
138 unsigned long tx_compressed;
139};
140
141
142/* Media selection options. */
143enum {
144 IF_PORT_UNKNOWN = 0,
145 IF_PORT_10BASE2,
146 IF_PORT_10BASET,
147 IF_PORT_AUI,
148 IF_PORT_100BASET,
149 IF_PORT_100BASETX,
150 IF_PORT_100BASEFX
151};
152
153#ifdef __KERNEL__
154
155#include <linux/cache.h>
156#include <linux/skbuff.h>
157
158struct neighbour;
159struct neigh_parms;
160struct sk_buff;
161
162struct netif_rx_stats
163{
164 unsigned total;
165 unsigned dropped;
166 unsigned time_squeeze;
1da177e4
LT		 167 unsigned cpu_collision;
168};
169
170DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
171
172
173/*
174 * We tag multicasts with these structures.
175 */
176
177struct dev_mc_list
178{
179 struct dev_mc_list *next;
180 __u8 dmi_addr[MAX_ADDR_LEN];
181 unsigned char dmi_addrlen;
182 int dmi_users;
183 int dmi_gusers;
184};
185
186struct hh_cache
187{
188 struct hh_cache *hh_next; /* Next entry */
189 atomic_t hh_refcnt; /* number of users */
190 unsigned short hh_type; /* protocol identifier, f.e ETH_P_IP
191 * NOTE: For VLANs, this will be the
192 * encapuslated type. --BLG
193 */
194 int hh_len; /* length of header */
195 int (*hh_output)(struct sk_buff *skb);
196 rwlock_t hh_lock;
197
198 /* cached hardware header; allow for machine alignment needs. */
199#define HH_DATA_MOD 16
200#define HH_DATA_OFF(__len) \
5ba0eac6 201 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 202#define HH_DATA_ALIGN(__len) \
203 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
204 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
205};
206
207/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
208 * Alternative is:
209 * dev->hard_header_len ? (dev->hard_header_len +
210 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
211 *
212 * We could use other alignment values, but we must maintain the
213 * relationship HH alignment <= LL alignment.
214 */
215#define LL_RESERVED_SPACE(dev) \
216 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
217#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
218 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
219
220/* These flag bits are private to the generic network queueing
221 * layer, they may not be explicitly referenced by any other
222 * code.
223 */
224
225enum netdev_state_t
226{
227 __LINK_STATE_XOFF=0,
228 __LINK_STATE_START,
229 __LINK_STATE_PRESENT,
230 __LINK_STATE_SCHED,
231 __LINK_STATE_NOCARRIER,
232 __LINK_STATE_RX_SCHED,
b00055aa
SR		 233 __LINK_STATE_LINKWATCH_PENDING,
234 __LINK_STATE_DORMANT,
48d83325 235 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 236};
237
238
239/*
240 * This structure holds at boot time configured netdevice settings. They
241 * are then used in the device probing.
242 */
243struct netdev_boot_setup {
244 char name[IFNAMSIZ];
245 struct ifmap map;
246};
247#define NETDEV_BOOT_SETUP_MAX 8
248
20380731 249extern int __init netdev_boot_setup(char *str);
1da177e4
LT		 250
251/*
252 * The DEVICE structure.
253 * Actually, this whole structure is a big mistake. It mixes I/O
254 * data with strictly "high-level" data, and it has to know about
255 * almost every data structure used in the INET module.
256 *
257 * FIXME: cleanup struct net_device such that network protocol info
258 * moves out.
259 */
260
261struct net_device
262{
263
264 /*
265 * This is the first field of the "visible" part of this structure
266 * (i.e. as seen by users in the "Space.c" file). It is the name
267 * the interface.
268 */
269 char name[IFNAMSIZ];
9356b8fc
ED		 270 /* device name hash chain */
271 struct hlist_node name_hlist;
1da177e4
LT		 272
273 /*
274 * I/O specific fields
275 * FIXME: Merge these and struct ifmap into one
276 */
277 unsigned long mem_end; /* shared mem end */
278 unsigned long mem_start; /* shared mem start */
279 unsigned long base_addr; /* device I/O address */
280 unsigned int irq; /* device IRQ number */
281
282 /*
283 * Some hardware also needs these fields, but they are not
284 * part of the usual set specified in Space.c.
285 */
286
287 unsigned char if_port; /* Selectable AUI, TP,..*/
288 unsigned char dma; /* DMA channel */
289
290 unsigned long state;
291
292 struct net_device *next;
293
294 /* The device initialization function. Called only once. */
295 int (*init)(struct net_device *dev);
296
297 /* ------- Fields preinitialized in Space.c finish here ------- */
298
9356b8fc
ED		 299 /* Net device features */
300 unsigned long features;
301#define NETIF_F_SG 1 /* Scatter/gather IO. */
302#define NETIF_F_IP_CSUM 2 /* Can checksum only TCP/UDP over IPv4. */
303#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
304#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
305#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
306#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
307#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
308#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
309#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
310#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 311#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 312#define NETIF_F_LLTX 4096 /* LockLess TX */
7967168c
HX		 313
314 /* Segmentation offload features */
315#define NETIF_F_GSO_SHIFT 16
bcd76111 316#define NETIF_F_GSO_MASK 0xffff0000
7967168c 317#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 318#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 319#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 320#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
321#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 322
78eb8877
HX		 323 /* List of features with software fallbacks. */
324#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
325
8648b305
HX		 326#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
327#define NETIF_F_ALL_CSUM (NETIF_F_IP_CSUM | NETIF_F_GEN_CSUM)
328
1da177e4
LT		 329 struct net_device *next_sched;
330
331 /* Interface index. Unique device identifier */
332 int ifindex;
333 int iflink;
334
335
336 struct net_device_stats* (*get_stats)(struct net_device *dev);
337 struct iw_statistics* (*get_wireless_stats)(struct net_device *dev);
338
339 /* List of functions to handle Wireless Extensions (instead of ioctl).
340 * See <net/iw_handler.h> for details. Jean II */
341 const struct iw_handler_def * wireless_handlers;
342 /* Instance data managed by the core of Wireless Extensions. */
343 struct iw_public_data * wireless_data;
344
345 struct ethtool_ops *ethtool_ops;
346
347 /*
348 * This marks the end of the "visible" part of the structure. All
349 * fields hereafter are internal to the system, and may change at
350 * will (read: may be cleaned up at will).
351 */
352
1da177e4 353
b00055aa 354 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 355 unsigned short gflags;
356 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
357 unsigned short padded; /* How much padding added by alloc_netdev() */
358
b00055aa
SR		 359 unsigned char operstate; /* RFC2863 operstate */
360 unsigned char link_mode; /* mapping policy to operstate */
361
1da177e4
LT		 362 unsigned mtu; /* interface MTU value */
363 unsigned short type; /* interface hardware type */
364 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 365
366 struct net_device *master; /* Pointer to master device of a group,
367 * which this device is member of.
368 */
369
370 /* Interface address info. */
a6f9a705 371 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 372 unsigned char addr_len; /* hardware address length */
373 unsigned short dev_id; /* for shared network cards */
374
375 struct dev_mc_list *mc_list; /* Multicast mac addresses */
376 int mc_count; /* Number of installed mcasts */
377 int promiscuity;
378 int allmulti;
379
1da177e4
LT		 380
381 /* Protocol specific pointers */
382
383 void *atalk_ptr; /* AppleTalk link */
384 void *ip_ptr; /* IPv4 specific data */
385 void *dn_ptr; /* DECnet specific data */
386 void *ip6_ptr; /* IPv6 specific data */
387 void *ec_ptr; /* Econet specific data */
388 void *ax25_ptr; /* AX.25 specific data */
389
9356b8fc
ED		 390/*
391 * Cache line mostly used on receive path (including eth_type_trans())
392 */
393 struct list_head poll_list ____cacheline_aligned_in_smp;
394 /* Link to poll list */
395
396 int (*poll) (struct net_device *dev, int *quota);
1da177e4
LT		 397 int quota;
398 int weight;
9356b8fc
ED		 399 unsigned long last_rx; /* Time of last Rx */
400 /* Interface address info used in eth_type_trans() */
401 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
402 because most packets are unicast) */
403
404 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 405
9356b8fc
ED		 406/*
407 * Cache line mostly used on queue transmit path (qdisc)
408 */
409 /* device queue lock */
410 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 411 struct Qdisc *qdisc;
412 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 413 struct list_head qdisc_list;
414 unsigned long tx_queue_len; /* Max frames per queue allowed */
415
f6a78bfc
HX		 416 /* Partially transmitted GSO packet. */
417 struct sk_buff *gso_skb;
418
1da177e4
LT		 419 /* ingress path synchronizer */
420 spinlock_t ingress_lock;
9356b8fc
ED		 421 struct Qdisc *qdisc_ingress;
422
423/*
424 * One part is mostly used on xmit path (device)
425 */
1da177e4 426 /* hard_start_xmit synchronizer */
932ff279 427 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 428 /* cpu id of processor entered to hard_start_xmit or -1,
429 if nobody entered there.
430 */
431 int xmit_lock_owner;
9356b8fc
ED		 432 void *priv; /* pointer to private data */
433 int (*hard_start_xmit) (struct sk_buff *skb,
434 struct net_device *dev);
435 /* These may be needed for future network-power-down code. */
436 unsigned long trans_start; /* Time (in jiffies) of last Tx */
437
438 int watchdog_timeo; /* used by dev_watchdog() */
439 struct timer_list watchdog_timer;
440
441/*
442 * refcnt is a very hot point, so align it on SMP
443 */
1da177e4 444 /* Number of references to this device */
9356b8fc
ED		 445 atomic_t refcnt ____cacheline_aligned_in_smp;
446
1da177e4
LT		 447 /* delayed register/unregister */
448 struct list_head todo_list;
1da177e4
LT		 449 /* device index hash chain */
450 struct hlist_node index_hlist;
451
452 /* register/unregister state machine */
453 enum { NETREG_UNINITIALIZED=0,
b17a7c17 454 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 455 NETREG_UNREGISTERING, /* called unregister_netdevice */
456 NETREG_UNREGISTERED, /* completed unregister todo */
457 NETREG_RELEASED, /* called free_netdev */
458 } reg_state;
459
1da177e4
LT		 460 /* Called after device is detached from network. */
461 void (*uninit)(struct net_device *dev);
462 /* Called after last user reference disappears. */
463 void (*destructor)(struct net_device *dev);
464
465 /* Pointers to interface service routines. */
466 int (*open)(struct net_device *dev);
467 int (*stop)(struct net_device *dev);
1da177e4 468#define HAVE_NETDEV_POLL
1da177e4
LT		 469 int (*hard_header) (struct sk_buff *skb,
470 struct net_device *dev,
471 unsigned short type,
472 void *daddr,
473 void *saddr,
474 unsigned len);
475 int (*rebuild_header)(struct sk_buff *skb);
476#define HAVE_MULTICAST
477 void (*set_multicast_list)(struct net_device *dev);
478#define HAVE_SET_MAC_ADDR
479 int (*set_mac_address)(struct net_device *dev,
480 void *addr);
481#define HAVE_PRIVATE_IOCTL
482 int (*do_ioctl)(struct net_device *dev,
483 struct ifreq *ifr, int cmd);
484#define HAVE_SET_CONFIG
485 int (*set_config)(struct net_device *dev,
486 struct ifmap *map);
487#define HAVE_HEADER_CACHE
488 int (*hard_header_cache)(struct neighbour *neigh,
489 struct hh_cache *hh);
490 void (*header_cache_update)(struct hh_cache *hh,
491 struct net_device *dev,
492 unsigned char * haddr);
493#define HAVE_CHANGE_MTU
494 int (*change_mtu)(struct net_device *dev, int new_mtu);
495
496#define HAVE_TX_TIMEOUT
497 void (*tx_timeout) (struct net_device *dev);
498
499 void (*vlan_rx_register)(struct net_device *dev,
500 struct vlan_group *grp);
501 void (*vlan_rx_add_vid)(struct net_device *dev,
502 unsigned short vid);
503 void (*vlan_rx_kill_vid)(struct net_device *dev,
504 unsigned short vid);
505
506 int (*hard_header_parse)(struct sk_buff *skb,
507 unsigned char *haddr);
508 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
509#ifdef CONFIG_NETPOLL
115c1d6e 510 struct netpoll_info *npinfo;
1da177e4
LT		 511#endif
512#ifdef CONFIG_NET_POLL_CONTROLLER
513 void (*poll_controller)(struct net_device *dev);
514#endif
515
516 /* bridge stuff */
517 struct net_bridge_port *br_port;
518
519#ifdef CONFIG_NET_DIVERT
520 /* this will get initialized at each interface type init routine */
521 struct divert_blk *divert;
522#endif /* CONFIG_NET_DIVERT */
523
524 /* class/net/name entry */
525 struct class_device class_dev;
fe9925b5
SH		 526 /* space for optional statistics and wireless sysfs groups */
527 struct attribute_group *sysfs_groups[3];
1da177e4
LT		 528};
529
530#define NETDEV_ALIGN 32
531#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
532
533static inline void *netdev_priv(struct net_device *dev)
534{
535 return (char *)dev + ((sizeof(struct net_device)
536 + NETDEV_ALIGN_CONST)
537 & ~NETDEV_ALIGN_CONST);
538}
539
540#define SET_MODULE_OWNER(dev) do { } while (0)
541/* Set the sysfs physical device reference for the network logical device
542 * if set prior to registration will cause a symlink during initialization.
543 */
544#define SET_NETDEV_DEV(net, pdev) ((net)->class_dev.dev = (pdev))
545
546struct packet_type {
f2ccd8fa
DM		 547 __be16 type; /* This is really htons(ether_type). */
548 struct net_device *dev; /* NULL is wildcarded here */
549 int (*func) (struct sk_buff *,
550 struct net_device *,
551 struct packet_type *,
552 struct net_device *);
576a30eb
HX		 553 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
554 int features);
a430a43d 555 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 556 void *af_packet_priv;
557 struct list_head list;
558};
559
560#include <linux/interrupt.h>
561#include <linux/notifier.h>
562
563extern struct net_device loopback_dev; /* The loopback */
564extern struct net_device *dev_base; /* All devices */
565extern rwlock_t dev_base_lock; /* Device list lock */
566
567extern int netdev_boot_setup_check(struct net_device *dev);
568extern unsigned long netdev_boot_base(const char *prefix, int unit);
569extern struct net_device *dev_getbyhwaddr(unsigned short type, char *hwaddr);
570extern struct net_device *dev_getfirstbyhwtype(unsigned short type);
571extern void dev_add_pack(struct packet_type *pt);
572extern void dev_remove_pack(struct packet_type *pt);
573extern void __dev_remove_pack(struct packet_type *pt);
574
575extern struct net_device *dev_get_by_flags(unsigned short flags,
576 unsigned short mask);
577extern struct net_device *dev_get_by_name(const char *name);
578extern struct net_device *__dev_get_by_name(const char *name);
579extern int dev_alloc_name(struct net_device *dev, const char *name);
580extern int dev_open(struct net_device *dev);
581extern int dev_close(struct net_device *dev);
582extern int dev_queue_xmit(struct sk_buff *skb);
583extern int register_netdevice(struct net_device *dev);
584extern int unregister_netdevice(struct net_device *dev);
585extern void free_netdev(struct net_device *dev);
586extern void synchronize_net(void);
587extern int register_netdevice_notifier(struct notifier_block *nb);
588extern int unregister_netdevice_notifier(struct notifier_block *nb);
589extern int call_netdevice_notifiers(unsigned long val, void *v);
590extern struct net_device *dev_get_by_index(int ifindex);
591extern struct net_device *__dev_get_by_index(int ifindex);
592extern int dev_restart(struct net_device *dev);
593#ifdef CONFIG_NETPOLL_TRAP
594extern int netpoll_trap(void);
595#endif
596
597typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
598extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
599static inline int unregister_gifconf(unsigned int family)
600{
601 return register_gifconf(family, NULL);
602}
603
604/*
605 * Incoming packets are placed on per-cpu queues so that
606 * no locking is needed.
607 */
608
609struct softnet_data
610{
31aa02c5 611 struct net_device *output_queue;
1da177e4
LT		 612 struct sk_buff_head input_pkt_queue;
613 struct list_head poll_list;
1da177e4
LT		 614 struct sk_buff *completion_queue;
615
616 struct net_device backlog_dev; /* Sorry. 8) */
db217334
CL		 617#ifdef CONFIG_NET_DMA
618 struct dma_chan *net_dma;
619#endif
1da177e4
LT		 620};
621
622DECLARE_PER_CPU(struct softnet_data,softnet_data);
623
624#define HAVE_NETIF_QUEUE
625
56079431 626extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 627
628static inline void netif_schedule(struct net_device *dev)
629{
630 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
631 __netif_schedule(dev);
632}
633
634static inline void netif_start_queue(struct net_device *dev)
635{
636 clear_bit(__LINK_STATE_XOFF, &dev->state);
637}
638
639static inline void netif_wake_queue(struct net_device *dev)
640{
641#ifdef CONFIG_NETPOLL_TRAP
642 if (netpoll_trap())
643 return;
644#endif
645 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
646 __netif_schedule(dev);
647}
648
649static inline void netif_stop_queue(struct net_device *dev)
650{
651#ifdef CONFIG_NETPOLL_TRAP
652 if (netpoll_trap())
653 return;
654#endif
655 set_bit(__LINK_STATE_XOFF, &dev->state);
656}
657
658static inline int netif_queue_stopped(const struct net_device *dev)
659{
660 return test_bit(__LINK_STATE_XOFF, &dev->state);
661}
662
663static inline int netif_running(const struct net_device *dev)
664{
665 return test_bit(__LINK_STATE_START, &dev->state);
666}
667
668
669/* Use this variant when it is known for sure that it
670 * is executing from interrupt context.
671 */
672static inline void dev_kfree_skb_irq(struct sk_buff *skb)
673{
674 if (atomic_dec_and_test(&skb->users)) {
675 struct softnet_data *sd;
676 unsigned long flags;
677
678 local_irq_save(flags);
679 sd = &__get_cpu_var(softnet_data);
680 skb->next = sd->completion_queue;
681 sd->completion_queue = skb;
682 raise_softirq_irqoff(NET_TX_SOFTIRQ);
683 local_irq_restore(flags);
684 }
685}
686
687/* Use this variant in places where it could be invoked
688 * either from interrupt or non-interrupt context.
689 */
56079431 690extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 691
692#define HAVE_NETIF_RX 1
693extern int netif_rx(struct sk_buff *skb);
694extern int netif_rx_ni(struct sk_buff *skb);
695#define HAVE_NETIF_RECEIVE_SKB 1
696extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 697extern int dev_valid_name(const char *name);
1da177e4
LT		 698extern int dev_ioctl(unsigned int cmd, void __user *);
699extern int dev_ethtool(struct ifreq *);
700extern unsigned dev_get_flags(const struct net_device *);
701extern int dev_change_flags(struct net_device *, unsigned);
702extern int dev_change_name(struct net_device *, char *);
703extern int dev_set_mtu(struct net_device *, int);
704extern int dev_set_mac_address(struct net_device *,
705 struct sockaddr *);
f6a78bfc
HX		 706extern int dev_hard_start_xmit(struct sk_buff *skb,
707 struct net_device *dev);
1da177e4
LT		 708
709extern void dev_init(void);
710
20380731 711extern int netdev_budget;
1da177e4
LT		 712
713/* Called by rtnetlink.c:rtnl_unlock() */
714extern void netdev_run_todo(void);
715
716static inline void dev_put(struct net_device *dev)
717{
718 atomic_dec(&dev->refcnt);
719}
720
15333061
SH		 721static inline void dev_hold(struct net_device *dev)
722{
723 atomic_inc(&dev->refcnt);
724}
1da177e4
LT		 725
726/* Carrier loss detection, dial on demand. The functions netif_carrier_on
727 * and _off may be called from IRQ context, but it is caller
728 * who is responsible for serialization of these calls.
b00055aa
SR		 729 *
730 * The name carrier is inappropriate, these functions should really be
731 * called netif_lowerlayer_*() because they represent the state of any
732 * kind of lower layer not just hardware media.
1da177e4
LT		 733 */
734
735extern void linkwatch_fire_event(struct net_device *dev);
736
737static inline int netif_carrier_ok(const struct net_device *dev)
738{
739 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
740}
741
742extern void __netdev_watchdog_up(struct net_device *dev);
743
0a242efc 744extern void netif_carrier_on(struct net_device *dev);
1da177e4 745
0a242efc 746extern void netif_carrier_off(struct net_device *dev);
1da177e4 747
b00055aa
SR		 748static inline void netif_dormant_on(struct net_device *dev)
749{
750 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
751 linkwatch_fire_event(dev);
752}
753
754static inline void netif_dormant_off(struct net_device *dev)
755{
756 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
757 linkwatch_fire_event(dev);
758}
759
760static inline int netif_dormant(const struct net_device *dev)
761{
762 return test_bit(__LINK_STATE_DORMANT, &dev->state);
763}
764
765
766static inline int netif_oper_up(const struct net_device *dev) {
767 return (dev->operstate == IF_OPER_UP ||
768 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
769}
770
1da177e4
LT		 771/* Hot-plugging. */
772static inline int netif_device_present(struct net_device *dev)
773{
774 return test_bit(__LINK_STATE_PRESENT, &dev->state);
775}
776
56079431 777extern void netif_device_detach(struct net_device *dev);
1da177e4 778
56079431 779extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 780
781/*
782 * Network interface message level settings
783 */
784#define HAVE_NETIF_MSG 1
785
786enum {
787 NETIF_MSG_DRV = 0x0001,
788 NETIF_MSG_PROBE = 0x0002,
789 NETIF_MSG_LINK = 0x0004,
790 NETIF_MSG_TIMER = 0x0008,
791 NETIF_MSG_IFDOWN = 0x0010,
792 NETIF_MSG_IFUP = 0x0020,
793 NETIF_MSG_RX_ERR = 0x0040,
794 NETIF_MSG_TX_ERR = 0x0080,
795 NETIF_MSG_TX_QUEUED = 0x0100,
796 NETIF_MSG_INTR = 0x0200,
797 NETIF_MSG_TX_DONE = 0x0400,
798 NETIF_MSG_RX_STATUS = 0x0800,
799 NETIF_MSG_PKTDATA = 0x1000,
800 NETIF_MSG_HW = 0x2000,
801 NETIF_MSG_WOL = 0x4000,
802};
803
804#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
805#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
806#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
807#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
808#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
809#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
810#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
811#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
812#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
813#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
814#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
815#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
816#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
817#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
818#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
819
820static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
821{
822 /* use default */
823 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
824 return default_msg_enable_bits;
825 if (debug_value == 0) /* no output */
826 return 0;
827 /* set low N bits */
828 return (1 << debug_value) - 1;
829}
830
0a122576
SH		 831/* Test if receive needs to be scheduled */
832static inline int __netif_rx_schedule_prep(struct net_device *dev)
793b883e
SH		 833{
834 return !test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state);
835}
1da177e4 836
0a122576 837/* Test if receive needs to be scheduled but only if up */
1da177e4
LT		 838static inline int netif_rx_schedule_prep(struct net_device *dev)
839{
0a122576 840 return netif_running(dev) && __netif_rx_schedule_prep(dev);
1da177e4
LT		 841}
842
843/* Add interface to tail of rx poll list. This assumes that _prep has
844 * already been called and returned 1.
845 */
846
56079431 847extern void __netif_rx_schedule(struct net_device *dev);
1da177e4
LT		 848
849/* Try to reschedule poll. Called by irq handler. */
850
851static inline void netif_rx_schedule(struct net_device *dev)
852{
853 if (netif_rx_schedule_prep(dev))
854 __netif_rx_schedule(dev);
855}
856
d3240312
SH		 857/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
858 * Do not inline this?
859 */
1da177e4
LT		 860static inline int netif_rx_reschedule(struct net_device *dev, int undo)
861{
862 if (netif_rx_schedule_prep(dev)) {
863 unsigned long flags;
d3240312
SH		 864
865 dev->quota += undo;
866
1da177e4 867 local_irq_save(flags);
d3240312
SH		 868 list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
869 __raise_softirq_irqoff(NET_RX_SOFTIRQ);
1da177e4
LT		 870 local_irq_restore(flags);
871 return 1;
872 }
873 return 0;
874}
875
876/* Remove interface from poll list: it must be in the poll list
877 * on current cpu. This primitive is called by dev->poll(), when
878 * it completes the work. The device cannot be out of poll list at this
879 * moment, it is BUG().
880 */
881static inline void netif_rx_complete(struct net_device *dev)
882{
883 unsigned long flags;
884
885 local_irq_save(flags);
886 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
887 list_del(&dev->poll_list);
888 smp_mb__before_clear_bit();
889 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
890 local_irq_restore(flags);
891}
892
893static inline void netif_poll_disable(struct net_device *dev)
894{
3173c890 895 while (test_and_set_bit(__LINK_STATE_RX_SCHED, &dev->state))
1da177e4 896 /* No hurry. */
3173c890 897 schedule_timeout_interruptible(1);
1da177e4
LT		 898}
899
900static inline void netif_poll_enable(struct net_device *dev)
901{
902 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
903}
904
905/* same as netif_rx_complete, except that local_irq_save(flags)
906 * has already been issued
907 */
908static inline void __netif_rx_complete(struct net_device *dev)
909{
910 BUG_ON(!test_bit(__LINK_STATE_RX_SCHED, &dev->state));
911 list_del(&dev->poll_list);
912 smp_mb__before_clear_bit();
913 clear_bit(__LINK_STATE_RX_SCHED, &dev->state);
914}
915
932ff279
HX		 916static inline void netif_tx_lock(struct net_device *dev)
917{
918 spin_lock(&dev->_xmit_lock);
919 dev->xmit_lock_owner = smp_processor_id();
920}
921
922static inline void netif_tx_lock_bh(struct net_device *dev)
923{
924 spin_lock_bh(&dev->_xmit_lock);
925 dev->xmit_lock_owner = smp_processor_id();
926}
927
928static inline int netif_tx_trylock(struct net_device *dev)
929{
53c4b2cc
HX		 930 int ok = spin_trylock(&dev->_xmit_lock);
931 if (likely(ok))
932ff279 932 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 933 return ok;
932ff279
HX		 934}
935
936static inline void netif_tx_unlock(struct net_device *dev)
937{
938 dev->xmit_lock_owner = -1;
939 spin_unlock(&dev->_xmit_lock);
940}
941
942static inline void netif_tx_unlock_bh(struct net_device *dev)
943{
944 dev->xmit_lock_owner = -1;
945 spin_unlock_bh(&dev->_xmit_lock);
946}
947
1da177e4
LT		 948static inline void netif_tx_disable(struct net_device *dev)
949{
932ff279 950 netif_tx_lock_bh(dev);
1da177e4 951 netif_stop_queue(dev);
932ff279 952 netif_tx_unlock_bh(dev);
1da177e4
LT		 953}
954
955/* These functions live elsewhere (drivers/net/net_init.c, but related) */
956
957extern void ether_setup(struct net_device *dev);
958
959/* Support for loadable net-drivers */
960extern struct net_device *alloc_netdev(int sizeof_priv, const char *name,
961 void (*setup)(struct net_device *));
962extern int register_netdev(struct net_device *dev);
963extern void unregister_netdev(struct net_device *dev);
964/* Functions used for multicast support */
965extern void dev_mc_upload(struct net_device *dev);
966extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
967extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
968extern void dev_mc_discard(struct net_device *dev);
969extern void dev_set_promiscuity(struct net_device *dev, int inc);
970extern void dev_set_allmulti(struct net_device *dev, int inc);
971extern void netdev_state_change(struct net_device *dev);
d8a33ac4 972extern void netdev_features_change(struct net_device *dev);
1da177e4
LT		 973/* Load a device via the kmod */
974extern void dev_load(const char *name);
975extern void dev_mcast_init(void);
976extern int netdev_max_backlog;
977extern int weight_p;
978extern int netdev_set_master(struct net_device *dev, struct net_device *master);
979extern int skb_checksum_help(struct sk_buff *skb, int inward);
576a30eb 980extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 981#ifdef CONFIG_BUG
982extern void netdev_rx_csum_fault(struct net_device *dev);
983#else
984static inline void netdev_rx_csum_fault(struct net_device *dev)
985{
986}
987#endif
1da177e4
LT		 988/* rx skb timestamps */
989extern void net_enable_timestamp(void);
990extern void net_disable_timestamp(void);
991
20380731
ACM		 992#ifdef CONFIG_PROC_FS
993extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
994extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
995extern void dev_seq_stop(struct seq_file *seq, void *v);
996#endif
997
998extern void linkwatch_run_queue(void);
999
bcd76111 1000static inline int net_gso_ok(int features, int gso_type)
576a30eb 1001{
bcd76111 1002 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1003 return (features & feature) == feature;
576a30eb
HX		 1004}
1005
bcd76111
HX		 1006static inline int skb_gso_ok(struct sk_buff *skb, int features)
1007{
a430a43d 1008 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1009}
1010
7967168c
HX		 1011static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1012{
a430a43d
HX		 1013 return skb_is_gso(skb) &&
1014 (!skb_gso_ok(skb, dev->features) ||
1015 unlikely(skb->ip_summed != CHECKSUM_HW));
7967168c
HX		 1016}
1017
7ea49ed7
DM		 1018/* On bonding slaves other than the currently active slave, suppress
1019 * duplicates except for 802.3ad ETH_P_SLOW and alb non-mcast/bcast.
1020 */
1021static inline int skb_bond_should_drop(struct sk_buff *skb)
1022{
1023 struct net_device *dev = skb->dev;
1024 struct net_device *master = dev->master;
1025
1026 if (master &&
1027 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
1028 if (master->priv_flags & IFF_MASTER_ALB) {
1029 if (skb->pkt_type != PACKET_BROADCAST &&
1030 skb->pkt_type != PACKET_MULTICAST)
1031 return 0;
1032 }
1033 if (master->priv_flags & IFF_MASTER_8023AD &&
1034 skb->protocol == __constant_htons(ETH_P_SLOW))
1035 return 0;
1036
1037 return 1;
1038 }
1039 return 0;
1040}
1041
1da177e4
LT		 1042#endif /* __KERNEL__ */
1043
1044#endif /* _LINUX_DEV_H */
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