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[TCP]: Remove lost_retrans zero seqno special cases
[net-next-2.6.git] / include / linux / netdevice.h
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1da177e4
LT		 1/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the Interfaces handler.
7 *
8 * Version: @(#)dev.h 1.0.10 08/12/93
9 *
02c30a84 10 * Authors: Ross Biro
1da177e4
LT		 11 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 * Corey Minyard <wf-rch!minyard@relay.EU.net>
13 * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov>
14 * Alan Cox, <Alan.Cox@linux.org>
15 * Bjorn Ekwall. <bj0rn@blox.se>
16 * Pekka Riikonen <priikone@poseidon.pspt.fi>
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License
20 * as published by the Free Software Foundation; either version
21 * 2 of the License, or (at your option) any later version.
22 *
23 * Moved to /usr/include/linux for NET3
24 */
25#ifndef _LINUX_NETDEVICE_H
26#define _LINUX_NETDEVICE_H
27
28#include <linux/if.h>
29#include <linux/if_ether.h>
30#include <linux/if_packet.h>
31
32#ifdef __KERNEL__
d7fe0f24 33#include <linux/timer.h>
bea3348e 34#include <linux/delay.h>
1da177e4
LT		 35#include <asm/atomic.h>
36#include <asm/cache.h>
37#include <asm/byteorder.h>
38
1da177e4
LT		 39#include <linux/device.h>
40#include <linux/percpu.h>
db217334 41#include <linux/dmaengine.h>
bea3348e 42#include <linux/workqueue.h>
1da177e4 43
a050c33f
DL		 44#include <net/net_namespace.h>
45
1da177e4
LT		 46struct vlan_group;
47struct ethtool_ops;
115c1d6e 48struct netpoll_info;
704232c2
JB		 49/* 802.11 specific */
50struct wireless_dev;
1da177e4
LT		 51 /* source back-compat hooks */
52#define SET_ETHTOOL_OPS(netdev,ops) \
53 ( (netdev)->ethtool_ops = (ops) )
54
55#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
56 functions are available. */
57#define HAVE_FREE_NETDEV /* free_netdev() */
58#define HAVE_NETDEV_PRIV /* netdev_priv() */
59
60#define NET_XMIT_SUCCESS 0
61#define NET_XMIT_DROP 1 /* skb dropped */
62#define NET_XMIT_CN 2 /* congestion notification */
63#define NET_XMIT_POLICED 3 /* skb is shot by police */
64#define NET_XMIT_BYPASS 4 /* packet does not leave via dequeue;
65 (TC use only - dev_queue_xmit
66 returns this as NET_XMIT_SUCCESS) */
67
68/* Backlog congestion levels */
69#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70#define NET_RX_DROP 1 /* packet dropped */
71#define NET_RX_CN_LOW 2 /* storm alert, just in case */
72#define NET_RX_CN_MOD 3 /* Storm on its way! */
73#define NET_RX_CN_HIGH 4 /* The storm is here */
74#define NET_RX_BAD 5 /* packet dropped due to kernel error */
75
b9df3cb8
GR		 76/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
77 * indicates that the device will soon be dropping packets, or already drops
78 * some packets of the same priority; prompting us to send less aggressively. */
79#define net_xmit_eval(e) ((e) == NET_XMIT_CN? 0 : (e))
1da177e4
LT		 80#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
81
82#endif
83
84#define MAX_ADDR_LEN 32 /* Largest hardware address length */
85
86/* Driver transmit return codes */
87#define NETDEV_TX_OK 0 /* driver took care of packet */
88#define NETDEV_TX_BUSY 1 /* driver tx path was busy*/
89#define NETDEV_TX_LOCKED -1 /* driver tx lock was already taken */
90
91/*
92 * Compute the worst case header length according to the protocols
93 * used.
94 */
95
96#if !defined(CONFIG_AX25) && !defined(CONFIG_AX25_MODULE) && !defined(CONFIG_TR)
97#define LL_MAX_HEADER 32
98#else
99#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
100#define LL_MAX_HEADER 96
101#else
102#define LL_MAX_HEADER 48
103#endif
104#endif
105
e81c7359
DM		 106#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
107 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
108 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
109 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
1da177e4
LT		 110#define MAX_HEADER LL_MAX_HEADER
111#else
112#define MAX_HEADER (LL_MAX_HEADER + 48)
113#endif
114
f25f4e44
PWJ		 115struct net_device_subqueue
116{
117 /* Give a control state for each queue. This struct may contain
118 * per-queue locks in the future.
119 */
120 unsigned long state;
121};
122
1da177e4
LT		 123/*
124 * Network device statistics. Akin to the 2.0 ether stats but
125 * with byte counters.
126 */
127
128struct net_device_stats
129{
130 unsigned long rx_packets; /* total packets received */
131 unsigned long tx_packets; /* total packets transmitted */
132 unsigned long rx_bytes; /* total bytes received */
133 unsigned long tx_bytes; /* total bytes transmitted */
134 unsigned long rx_errors; /* bad packets received */
135 unsigned long tx_errors; /* packet transmit problems */
136 unsigned long rx_dropped; /* no space in linux buffers */
137 unsigned long tx_dropped; /* no space available in linux */
138 unsigned long multicast; /* multicast packets received */
139 unsigned long collisions;
140
141 /* detailed rx_errors: */
142 unsigned long rx_length_errors;
143 unsigned long rx_over_errors; /* receiver ring buff overflow */
144 unsigned long rx_crc_errors; /* recved pkt with crc error */
145 unsigned long rx_frame_errors; /* recv'd frame alignment error */
146 unsigned long rx_fifo_errors; /* recv'r fifo overrun */
147 unsigned long rx_missed_errors; /* receiver missed packet */
148
149 /* detailed tx_errors */
150 unsigned long tx_aborted_errors;
151 unsigned long tx_carrier_errors;
152 unsigned long tx_fifo_errors;
153 unsigned long tx_heartbeat_errors;
154 unsigned long tx_window_errors;
155
156 /* for cslip etc */
157 unsigned long rx_compressed;
158 unsigned long tx_compressed;
159};
160
161
162/* Media selection options. */
163enum {
164 IF_PORT_UNKNOWN = 0,
165 IF_PORT_10BASE2,
166 IF_PORT_10BASET,
167 IF_PORT_AUI,
168 IF_PORT_100BASET,
169 IF_PORT_100BASETX,
170 IF_PORT_100BASEFX
171};
172
173#ifdef __KERNEL__
174
175#include <linux/cache.h>
176#include <linux/skbuff.h>
177
178struct neighbour;
179struct neigh_parms;
180struct sk_buff;
181
182struct netif_rx_stats
183{
184 unsigned total;
185 unsigned dropped;
186 unsigned time_squeeze;
1da177e4
LT		 187 unsigned cpu_collision;
188};
189
190DECLARE_PER_CPU(struct netif_rx_stats, netdev_rx_stat);
191
bf742482
PM		 192struct dev_addr_list
193{
194 struct dev_addr_list *next;
195 u8 da_addr[MAX_ADDR_LEN];
196 u8 da_addrlen;
a0a400d7 197 u8 da_synced;
bf742482
PM		 198 int da_users;
199 int da_gusers;
200};
1da177e4
LT		 201
202/*
203 * We tag multicasts with these structures.
204 */
3fba5a8b
PM		 205
206#define dev_mc_list dev_addr_list
207#define dmi_addr da_addr
208#define dmi_addrlen da_addrlen
209#define dmi_users da_users
210#define dmi_gusers da_gusers
1da177e4
LT		 211
212struct hh_cache
213{
214 struct hh_cache *hh_next; /* Next entry */
215 atomic_t hh_refcnt; /* number of users */
f0490980
ED		 216/*
217 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
218 * cache line on SMP.
219 * They are mostly read, but hh_refcnt may be changed quite frequently,
220 * incurring cache line ping pongs.
221 */
222 __be16 hh_type ____cacheline_aligned_in_smp;
223 /* protocol identifier, f.e ETH_P_IP
1da177e4
LT		 224 * NOTE: For VLANs, this will be the
225 * encapuslated type. --BLG
226 */
d5c42c0e 227 u16 hh_len; /* length of header */
1da177e4 228 int (*hh_output)(struct sk_buff *skb);
3644f0ce 229 seqlock_t hh_lock;
1da177e4
LT		 230
231 /* cached hardware header; allow for machine alignment needs. */
232#define HH_DATA_MOD 16
233#define HH_DATA_OFF(__len) \
5ba0eac6 234 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
1da177e4
LT		 235#define HH_DATA_ALIGN(__len) \
236 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
237 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
238};
239
240/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
241 * Alternative is:
242 * dev->hard_header_len ? (dev->hard_header_len +
243 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
244 *
245 * We could use other alignment values, but we must maintain the
246 * relationship HH alignment <= LL alignment.
247 */
248#define LL_RESERVED_SPACE(dev) \
249 (((dev)->hard_header_len&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
250#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
251 ((((dev)->hard_header_len+extra)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
252
3b04ddde
SH		 253struct header_ops {
254 int (*create) (struct sk_buff *skb, struct net_device *dev,
255 unsigned short type, const void *daddr,
256 const void *saddr, unsigned len);
257 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
258 int (*rebuild)(struct sk_buff *skb);
259#define HAVE_HEADER_CACHE
260 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
261 void (*cache_update)(struct hh_cache *hh,
262 const struct net_device *dev,
263 const unsigned char *haddr);
264};
265
1da177e4
LT		 266/* These flag bits are private to the generic network queueing
267 * layer, they may not be explicitly referenced by any other
268 * code.
269 */
270
271enum netdev_state_t
272{
273 __LINK_STATE_XOFF=0,
274 __LINK_STATE_START,
275 __LINK_STATE_PRESENT,
276 __LINK_STATE_SCHED,
277 __LINK_STATE_NOCARRIER,
b00055aa
SR		 278 __LINK_STATE_LINKWATCH_PENDING,
279 __LINK_STATE_DORMANT,
48d83325 280 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT		 281};
282
283
284/*
285 * This structure holds at boot time configured netdevice settings. They
286 * are then used in the device probing.
287 */
288struct netdev_boot_setup {
289 char name[IFNAMSIZ];
290 struct ifmap map;
291};
292#define NETDEV_BOOT_SETUP_MAX 8
293
20380731 294extern int __init netdev_boot_setup(char *str);
1da177e4 295
bea3348e
SH		 296/*
297 * Structure for NAPI scheduling similar to tasklet but with weighting
298 */
299struct napi_struct {
300 /* The poll_list must only be managed by the entity which
301 * changes the state of the NAPI_STATE_SCHED bit. This means
302 * whoever atomically sets that bit can add this napi_struct
303 * to the per-cpu poll_list, and whoever clears that bit
304 * can remove from the list right before clearing the bit.
305 */
306 struct list_head poll_list;
307
308 unsigned long state;
309 int weight;
310 int (*poll)(struct napi_struct *, int);
311#ifdef CONFIG_NETPOLL
312 spinlock_t poll_lock;
313 int poll_owner;
314 struct net_device *dev;
315 struct list_head dev_list;
316#endif
317};
318
319enum
320{
321 NAPI_STATE_SCHED, /* Poll is scheduled */
322};
323
324extern void FASTCALL(__napi_schedule(struct napi_struct *n));
325
326/**
327 * napi_schedule_prep - check if napi can be scheduled
328 * @n: napi context
329 *
330 * Test if NAPI routine is already running, and if not mark
331 * it as running. This is used as a condition variable
332 * insure only one NAPI poll instance runs
333 */
334static inline int napi_schedule_prep(struct napi_struct *n)
335{
336 return !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
337}
338
339/**
340 * napi_schedule - schedule NAPI poll
341 * @n: napi context
342 *
343 * Schedule NAPI poll routine to be called if it is not already
344 * running.
345 */
346static inline void napi_schedule(struct napi_struct *n)
347{
348 if (napi_schedule_prep(n))
349 __napi_schedule(n);
350}
351
bfe13f54
RD		 352/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
353static inline int napi_reschedule(struct napi_struct *napi)
354{
355 if (napi_schedule_prep(napi)) {
356 __napi_schedule(napi);
357 return 1;
358 }
359 return 0;
360}
361
bea3348e
SH		 362/**
363 * napi_complete - NAPI processing complete
364 * @n: napi context
365 *
366 * Mark NAPI processing as complete.
367 */
368static inline void __napi_complete(struct napi_struct *n)
369{
370 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
371 list_del(&n->poll_list);
372 smp_mb__before_clear_bit();
373 clear_bit(NAPI_STATE_SCHED, &n->state);
374}
375
376static inline void napi_complete(struct napi_struct *n)
377{
378 local_irq_disable();
379 __napi_complete(n);
380 local_irq_enable();
381}
382
383/**
384 * napi_disable - prevent NAPI from scheduling
385 * @n: napi context
386 *
387 * Stop NAPI from being scheduled on this context.
388 * Waits till any outstanding processing completes.
389 */
390static inline void napi_disable(struct napi_struct *n)
391{
392 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
393 msleep_interruptible(1);
394}
395
396/**
397 * napi_enable - enable NAPI scheduling
398 * @n: napi context
399 *
400 * Resume NAPI from being scheduled on this context.
401 * Must be paired with napi_disable.
402 */
403static inline void napi_enable(struct napi_struct *n)
404{
405 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
406 smp_mb__before_clear_bit();
407 clear_bit(NAPI_STATE_SCHED, &n->state);
408}
409
1da177e4
LT		 410/*
411 * The DEVICE structure.
412 * Actually, this whole structure is a big mistake. It mixes I/O
413 * data with strictly "high-level" data, and it has to know about
414 * almost every data structure used in the INET module.
415 *
416 * FIXME: cleanup struct net_device such that network protocol info
417 * moves out.
418 */
419
420struct net_device
421{
422
423 /*
424 * This is the first field of the "visible" part of this structure
425 * (i.e. as seen by users in the "Space.c" file). It is the name
426 * the interface.
427 */
428 char name[IFNAMSIZ];
9356b8fc
ED		 429 /* device name hash chain */
430 struct hlist_node name_hlist;
1da177e4
LT		 431
432 /*
433 * I/O specific fields
434 * FIXME: Merge these and struct ifmap into one
435 */
436 unsigned long mem_end; /* shared mem end */
437 unsigned long mem_start; /* shared mem start */
438 unsigned long base_addr; /* device I/O address */
439 unsigned int irq; /* device IRQ number */
440
441 /*
442 * Some hardware also needs these fields, but they are not
443 * part of the usual set specified in Space.c.
444 */
445
446 unsigned char if_port; /* Selectable AUI, TP,..*/
447 unsigned char dma; /* DMA channel */
448
449 unsigned long state;
450
7562f876 451 struct list_head dev_list;
bea3348e
SH		 452#ifdef CONFIG_NETPOLL
453 struct list_head napi_list;
454#endif
1da177e4
LT		 455
456 /* The device initialization function. Called only once. */
457 int (*init)(struct net_device *dev);
458
459 /* ------- Fields preinitialized in Space.c finish here ------- */
460
9356b8fc
ED		 461 /* Net device features */
462 unsigned long features;
463#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 464#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED		 465#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
466#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 467#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED		 468#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
469#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
470#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
471#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
472#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
473#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 474#define NETIF_F_GSO 2048 /* Enable software GSO. */
e24eb521
CB		 475#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
476 /* do not use LLTX in new drivers */
ce286d32 477#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
f25f4e44 478#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
3ae7c0b2 479#define NETIF_F_LRO 32768 /* large receive offload */
7967168c
HX		 480
481 /* Segmentation offload features */
482#define NETIF_F_GSO_SHIFT 16
bcd76111 483#define NETIF_F_GSO_MASK 0xffff0000
7967168c 484#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 485#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 486#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 487#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
488#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 489
78eb8877
HX		 490 /* List of features with software fallbacks. */
491#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
492
d212f87b 493
8648b305 494#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH		 495#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
496#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
497#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 498
1da177e4
LT		 499 struct net_device *next_sched;
500
501 /* Interface index. Unique device identifier */
502 int ifindex;
503 int iflink;
504
505
506 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 507 struct net_device_stats stats;
1da177e4 508
b86e0280 509#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT		 510 /* List of functions to handle Wireless Extensions (instead of ioctl).
511 * See <net/iw_handler.h> for details. Jean II */
512 const struct iw_handler_def * wireless_handlers;
513 /* Instance data managed by the core of Wireless Extensions. */
514 struct iw_public_data * wireless_data;
b86e0280 515#endif
76fd8593 516 const struct ethtool_ops *ethtool_ops;
1da177e4 517
3b04ddde
SH		 518 /* Hardware header description */
519 const struct header_ops *header_ops;
520
1da177e4
LT		 521 /*
522 * This marks the end of the "visible" part of the structure. All
523 * fields hereafter are internal to the system, and may change at
524 * will (read: may be cleaned up at will).
525 */
526
1da177e4 527
b00055aa 528 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 529 unsigned short gflags;
530 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
531 unsigned short padded; /* How much padding added by alloc_netdev() */
532
b00055aa
SR		 533 unsigned char operstate; /* RFC2863 operstate */
534 unsigned char link_mode; /* mapping policy to operstate */
535
1da177e4
LT		 536 unsigned mtu; /* interface MTU value */
537 unsigned short type; /* interface hardware type */
538 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 539
540 struct net_device *master; /* Pointer to master device of a group,
541 * which this device is member of.
542 */
543
544 /* Interface address info. */
a6f9a705 545 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 546 unsigned char addr_len; /* hardware address length */
547 unsigned short dev_id; /* for shared network cards */
548
4417da66
PM		 549 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
550 int uc_count; /* Number of installed ucasts */
551 int uc_promisc;
3fba5a8b 552 struct dev_addr_list *mc_list; /* Multicast mac addresses */
1da177e4
LT		 553 int mc_count; /* Number of installed mcasts */
554 int promiscuity;
555 int allmulti;
556
1da177e4
LT		 557
558 /* Protocol specific pointers */
559
560 void *atalk_ptr; /* AppleTalk link */
561 void *ip_ptr; /* IPv4 specific data */
562 void *dn_ptr; /* DECnet specific data */
563 void *ip6_ptr; /* IPv6 specific data */
564 void *ec_ptr; /* Econet specific data */
565 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB		 566 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
567 assign before registering */
1da177e4 568
9356b8fc
ED		 569/*
570 * Cache line mostly used on receive path (including eth_type_trans())
571 */
9356b8fc
ED		 572 unsigned long last_rx; /* Time of last Rx */
573 /* Interface address info used in eth_type_trans() */
574 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
575 because most packets are unicast) */
576
577 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 578
9356b8fc
ED		 579/*
580 * Cache line mostly used on queue transmit path (qdisc)
581 */
582 /* device queue lock */
583 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 584 struct Qdisc *qdisc;
585 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 586 struct list_head qdisc_list;
587 unsigned long tx_queue_len; /* Max frames per queue allowed */
588
f6a78bfc
HX		 589 /* Partially transmitted GSO packet. */
590 struct sk_buff *gso_skb;
591
1da177e4
LT		 592 /* ingress path synchronizer */
593 spinlock_t ingress_lock;
9356b8fc
ED		 594 struct Qdisc *qdisc_ingress;
595
596/*
597 * One part is mostly used on xmit path (device)
598 */
1da177e4 599 /* hard_start_xmit synchronizer */
932ff279 600 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 601 /* cpu id of processor entered to hard_start_xmit or -1,
602 if nobody entered there.
603 */
604 int xmit_lock_owner;
9356b8fc
ED		 605 void *priv; /* pointer to private data */
606 int (*hard_start_xmit) (struct sk_buff *skb,
607 struct net_device *dev);
608 /* These may be needed for future network-power-down code. */
609 unsigned long trans_start; /* Time (in jiffies) of last Tx */
610
611 int watchdog_timeo; /* used by dev_watchdog() */
612 struct timer_list watchdog_timer;
613
614/*
615 * refcnt is a very hot point, so align it on SMP
616 */
1da177e4 617 /* Number of references to this device */
9356b8fc
ED		 618 atomic_t refcnt ____cacheline_aligned_in_smp;
619
1da177e4
LT		 620 /* delayed register/unregister */
621 struct list_head todo_list;
1da177e4
LT		 622 /* device index hash chain */
623 struct hlist_node index_hlist;
624
572a103d
HX		 625 struct net_device *link_watch_next;
626
1da177e4
LT		 627 /* register/unregister state machine */
628 enum { NETREG_UNINITIALIZED=0,
b17a7c17 629 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 630 NETREG_UNREGISTERING, /* called unregister_netdevice */
631 NETREG_UNREGISTERED, /* completed unregister todo */
632 NETREG_RELEASED, /* called free_netdev */
633 } reg_state;
634
1da177e4
LT		 635 /* Called after device is detached from network. */
636 void (*uninit)(struct net_device *dev);
637 /* Called after last user reference disappears. */
638 void (*destructor)(struct net_device *dev);
639
640 /* Pointers to interface service routines. */
641 int (*open)(struct net_device *dev);
642 int (*stop)(struct net_device *dev);
1da177e4 643#define HAVE_NETDEV_POLL
24023451
PM		 644#define HAVE_CHANGE_RX_FLAGS
645 void (*change_rx_flags)(struct net_device *dev,
646 int flags);
4417da66
PM		 647#define HAVE_SET_RX_MODE
648 void (*set_rx_mode)(struct net_device *dev);
1da177e4
LT		 649#define HAVE_MULTICAST
650 void (*set_multicast_list)(struct net_device *dev);
651#define HAVE_SET_MAC_ADDR
652 int (*set_mac_address)(struct net_device *dev,
653 void *addr);
654#define HAVE_PRIVATE_IOCTL
655 int (*do_ioctl)(struct net_device *dev,
656 struct ifreq *ifr, int cmd);
657#define HAVE_SET_CONFIG
658 int (*set_config)(struct net_device *dev,
659 struct ifmap *map);
1da177e4
LT		 660#define HAVE_CHANGE_MTU
661 int (*change_mtu)(struct net_device *dev, int new_mtu);
662
663#define HAVE_TX_TIMEOUT
664 void (*tx_timeout) (struct net_device *dev);
665
666 void (*vlan_rx_register)(struct net_device *dev,
667 struct vlan_group *grp);
668 void (*vlan_rx_add_vid)(struct net_device *dev,
669 unsigned short vid);
670 void (*vlan_rx_kill_vid)(struct net_device *dev,
671 unsigned short vid);
672
1da177e4
LT		 673 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
674#ifdef CONFIG_NETPOLL
115c1d6e 675 struct netpoll_info *npinfo;
1da177e4
LT		 676#endif
677#ifdef CONFIG_NET_POLL_CONTROLLER
678 void (*poll_controller)(struct net_device *dev);
679#endif
680
4a1c5371
EB		 681 /* Network namespace this network device is inside */
682 struct net *nd_net;
683
1da177e4
LT		 684 /* bridge stuff */
685 struct net_bridge_port *br_port;
b863ceb7
PM		 686 /* macvlan */
687 struct macvlan_port *macvlan_port;
1da177e4 688
1da177e4 689 /* class/net/name entry */
43cb76d9 690 struct device dev;
fe9925b5
SH		 691 /* space for optional statistics and wireless sysfs groups */
692 struct attribute_group *sysfs_groups[3];
38f7b870
PM		 693
694 /* rtnetlink link ops */
695 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44
PWJ		 696
697 /* The TX queue control structures */
698 unsigned int egress_subqueue_count;
31ce72a6 699 struct net_device_subqueue egress_subqueue[1];
1da177e4 700};
43cb76d9 701#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 702
703#define NETDEV_ALIGN 32
704#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
705
bea3348e
SH		 706/**
707 * netdev_priv - access network device private data
708 * @dev: network device
709 *
710 * Get network device private data
711 */
6472ce60 712static inline void *netdev_priv(const struct net_device *dev)
1da177e4 713{
f25f4e44 714 return dev->priv;
1da177e4
LT		 715}
716
1da177e4
LT		 717/* Set the sysfs physical device reference for the network logical device
718 * if set prior to registration will cause a symlink during initialization.
719 */
43cb76d9 720#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 721
bea3348e
SH		 722static inline void netif_napi_add(struct net_device *dev,
723 struct napi_struct *napi,
724 int (*poll)(struct napi_struct *, int),
725 int weight)
726{
727 INIT_LIST_HEAD(&napi->poll_list);
728 napi->poll = poll;
729 napi->weight = weight;
730#ifdef CONFIG_NETPOLL
731 napi->dev = dev;
732 list_add(&napi->dev_list, &dev->napi_list);
733 spin_lock_init(&napi->poll_lock);
734 napi->poll_owner = -1;
735#endif
736 set_bit(NAPI_STATE_SCHED, &napi->state);
737}
738
1da177e4 739struct packet_type {
f2ccd8fa
DM		 740 __be16 type; /* This is really htons(ether_type). */
741 struct net_device *dev; /* NULL is wildcarded here */
742 int (*func) (struct sk_buff *,
743 struct net_device *,
744 struct packet_type *,
745 struct net_device *);
576a30eb
HX		 746 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
747 int features);
a430a43d 748 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 749 void *af_packet_priv;
750 struct list_head list;
751};
752
753#include <linux/interrupt.h>
754#include <linux/notifier.h>
755
1da177e4
LT		 756extern rwlock_t dev_base_lock; /* Device list lock */
757
7562f876 758
881d966b
EB		 759#define for_each_netdev(net, d) \
760 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
761#define for_each_netdev_safe(net, d, n) \
762 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
763#define for_each_netdev_continue(net, d) \
764 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
765#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 766
a050c33f
DL		 767static inline struct net_device *next_net_device(struct net_device *dev)
768{
769 struct list_head *lh;
770 struct net *net;
771
772 net = dev->nd_net;
773 lh = dev->dev_list.next;
774 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
775}
776
777static inline struct net_device *first_net_device(struct net *net)
778{
779 return list_empty(&net->dev_base_head) ? NULL :
780 net_device_entry(net->dev_base_head.next);
781}
7562f876 782
1da177e4
LT		 783extern int netdev_boot_setup_check(struct net_device *dev);
784extern unsigned long netdev_boot_base(const char *prefix, int unit);
881d966b
EB		 785extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
786extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
787extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT		 788extern void dev_add_pack(struct packet_type *pt);
789extern void dev_remove_pack(struct packet_type *pt);
790extern void __dev_remove_pack(struct packet_type *pt);
791
881d966b 792extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1da177e4 793 unsigned short mask);
881d966b
EB		 794extern struct net_device *dev_get_by_name(struct net *net, const char *name);
795extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT		 796extern int dev_alloc_name(struct net_device *dev, const char *name);
797extern int dev_open(struct net_device *dev);
798extern int dev_close(struct net_device *dev);
799extern int dev_queue_xmit(struct sk_buff *skb);
800extern int register_netdevice(struct net_device *dev);
22f8cde5 801extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 802extern void free_netdev(struct net_device *dev);
803extern void synchronize_net(void);
804extern int register_netdevice_notifier(struct notifier_block *nb);
805extern int unregister_netdevice_notifier(struct notifier_block *nb);
ad7379d4 806extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
881d966b
EB		 807extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
808extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1da177e4
LT		 809extern int dev_restart(struct net_device *dev);
810#ifdef CONFIG_NETPOLL_TRAP
811extern int netpoll_trap(void);
812#endif
813
0c4e8581
SH		 814static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
815 unsigned short type,
3b04ddde
SH		 816 const void *daddr, const void *saddr,
817 unsigned len)
0c4e8581 818{
3b04ddde 819 if (!dev->header_ops)
0c4e8581 820 return 0;
3b04ddde
SH		 821
822 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
0c4e8581
SH		 823}
824
b95cce35
SH		 825static inline int dev_parse_header(const struct sk_buff *skb,
826 unsigned char *haddr)
827{
828 const struct net_device *dev = skb->dev;
829
3b04ddde 830 if (!dev->header_ops->parse)
b95cce35 831 return 0;
3b04ddde 832 return dev->header_ops->parse(skb, haddr);
b95cce35
SH		 833}
834
1da177e4
LT		 835typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
836extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
837static inline int unregister_gifconf(unsigned int family)
838{
839 return register_gifconf(family, NULL);
840}
841
842/*
843 * Incoming packets are placed on per-cpu queues so that
844 * no locking is needed.
845 */
1da177e4
LT		 846struct softnet_data
847{
31aa02c5 848 struct net_device *output_queue;
1da177e4
LT		 849 struct sk_buff_head input_pkt_queue;
850 struct list_head poll_list;
1da177e4
LT		 851 struct sk_buff *completion_queue;
852
bea3348e 853 struct napi_struct backlog;
db217334
CL		 854#ifdef CONFIG_NET_DMA
855 struct dma_chan *net_dma;
856#endif
1da177e4
LT		 857};
858
859DECLARE_PER_CPU(struct softnet_data,softnet_data);
860
861#define HAVE_NETIF_QUEUE
862
56079431 863extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 864
865static inline void netif_schedule(struct net_device *dev)
866{
867 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
868 __netif_schedule(dev);
869}
870
bea3348e
SH		 871/**
872 * netif_start_queue - allow transmit
873 * @dev: network device
874 *
875 * Allow upper layers to call the device hard_start_xmit routine.
876 */
1da177e4
LT		 877static inline void netif_start_queue(struct net_device *dev)
878{
879 clear_bit(__LINK_STATE_XOFF, &dev->state);
880}
881
bea3348e
SH		 882/**
883 * netif_wake_queue - restart transmit
884 * @dev: network device
885 *
886 * Allow upper layers to call the device hard_start_xmit routine.
887 * Used for flow control when transmit resources are available.
888 */
1da177e4
LT		 889static inline void netif_wake_queue(struct net_device *dev)
890{
891#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS		 892 if (netpoll_trap()) {
893 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 894 return;
5f286e11 895 }
1da177e4
LT		 896#endif
897 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
898 __netif_schedule(dev);
899}
900
bea3348e
SH		 901/**
902 * netif_stop_queue - stop transmitted packets
903 * @dev: network device
904 *
905 * Stop upper layers calling the device hard_start_xmit routine.
906 * Used for flow control when transmit resources are unavailable.
907 */
1da177e4
LT		 908static inline void netif_stop_queue(struct net_device *dev)
909{
1da177e4
LT		 910 set_bit(__LINK_STATE_XOFF, &dev->state);
911}
912
bea3348e
SH		 913/**
914 * netif_queue_stopped - test if transmit queue is flowblocked
915 * @dev: network device
916 *
917 * Test if transmit queue on device is currently unable to send.
918 */
1da177e4
LT		 919static inline int netif_queue_stopped(const struct net_device *dev)
920{
921 return test_bit(__LINK_STATE_XOFF, &dev->state);
922}
923
bea3348e
SH		 924/**
925 * netif_running - test if up
926 * @dev: network device
927 *
928 * Test if the device has been brought up.
929 */
1da177e4
LT		 930static inline int netif_running(const struct net_device *dev)
931{
932 return test_bit(__LINK_STATE_START, &dev->state);
933}
934
f25f4e44
PWJ		 935/*
936 * Routines to manage the subqueues on a device. We only need start
937 * stop, and a check if it's stopped. All other device management is
938 * done at the overall netdevice level.
939 * Also test the device if we're multiqueue.
940 */
bea3348e
SH		 941
942/**
943 * netif_start_subqueue - allow sending packets on subqueue
944 * @dev: network device
945 * @queue_index: sub queue index
946 *
947 * Start individual transmit queue of a device with multiple transmit queues.
948 */
f25f4e44
PWJ		 949static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
950{
951#ifdef CONFIG_NETDEVICES_MULTIQUEUE
952 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
953#endif
954}
955
bea3348e
SH		 956/**
957 * netif_stop_subqueue - stop sending packets on subqueue
958 * @dev: network device
959 * @queue_index: sub queue index
960 *
961 * Stop individual transmit queue of a device with multiple transmit queues.
962 */
f25f4e44
PWJ		 963static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
964{
965#ifdef CONFIG_NETDEVICES_MULTIQUEUE
966#ifdef CONFIG_NETPOLL_TRAP
967 if (netpoll_trap())
968 return;
969#endif
970 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
971#endif
972}
973
bea3348e
SH		 974/**
975 * netif_subqueue_stopped - test status of subqueue
976 * @dev: network device
977 * @queue_index: sub queue index
978 *
979 * Check individual transmit queue of a device with multiple transmit queues.
980 */
f25f4e44
PWJ		 981static inline int netif_subqueue_stopped(const struct net_device *dev,
982 u16 queue_index)
983{
984#ifdef CONFIG_NETDEVICES_MULTIQUEUE
985 return test_bit(__LINK_STATE_XOFF,
986 &dev->egress_subqueue[queue_index].state);
987#else
988 return 0;
989#endif
990}
991
bea3348e
SH		 992
993/**
994 * netif_wake_subqueue - allow sending packets on subqueue
995 * @dev: network device
996 * @queue_index: sub queue index
997 *
998 * Resume individual transmit queue of a device with multiple transmit queues.
999 */
f25f4e44
PWJ		 1000static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1001{
1002#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1003#ifdef CONFIG_NETPOLL_TRAP
1004 if (netpoll_trap())
1005 return;
1006#endif
1007 if (test_and_clear_bit(__LINK_STATE_XOFF,
1008 &dev->egress_subqueue[queue_index].state))
1009 __netif_schedule(dev);
1010#endif
1011}
1012
bea3348e
SH		 1013/**
1014 * netif_is_multiqueue - test if device has multiple transmit queues
1015 * @dev: network device
1016 *
1017 * Check if device has multiple transmit queues
1018 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1019 */
f25f4e44
PWJ		 1020static inline int netif_is_multiqueue(const struct net_device *dev)
1021{
1022#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1023 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1024#else
1025 return 0;
1026#endif
1027}
1da177e4
LT		 1028
1029/* Use this variant when it is known for sure that it
1030 * is executing from interrupt context.
1031 */
bea3348e 1032extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT		 1033
1034/* Use this variant in places where it could be invoked
1035 * either from interrupt or non-interrupt context.
1036 */
56079431 1037extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 1038
1039#define HAVE_NETIF_RX 1
1040extern int netif_rx(struct sk_buff *skb);
1041extern int netif_rx_ni(struct sk_buff *skb);
1042#define HAVE_NETIF_RECEIVE_SKB 1
1043extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 1044extern int dev_valid_name(const char *name);
881d966b
EB		 1045extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1046extern int dev_ethtool(struct net *net, struct ifreq *);
1da177e4
LT		 1047extern unsigned dev_get_flags(const struct net_device *);
1048extern int dev_change_flags(struct net_device *, unsigned);
1049extern int dev_change_name(struct net_device *, char *);
ce286d32
EB		 1050extern int dev_change_net_namespace(struct net_device *,
1051 struct net *, const char *);
1da177e4
LT		 1052extern int dev_set_mtu(struct net_device *, int);
1053extern int dev_set_mac_address(struct net_device *,
1054 struct sockaddr *);
f6a78bfc
HX		 1055extern int dev_hard_start_xmit(struct sk_buff *skb,
1056 struct net_device *dev);
1da177e4 1057
20380731 1058extern int netdev_budget;
1da177e4
LT		 1059
1060/* Called by rtnetlink.c:rtnl_unlock() */
1061extern void netdev_run_todo(void);
1062
bea3348e
SH		 1063/**
1064 * dev_put - release reference to device
1065 * @dev: network device
1066 *
9ef4429b 1067 * Release reference to device to allow it to be freed.
bea3348e 1068 */
1da177e4
LT		 1069static inline void dev_put(struct net_device *dev)
1070{
1071 atomic_dec(&dev->refcnt);
1072}
1073
bea3348e
SH		 1074/**
1075 * dev_hold - get reference to device
1076 * @dev: network device
1077 *
9ef4429b 1078 * Hold reference to device to keep it from being freed.
bea3348e 1079 */
15333061
SH		 1080static inline void dev_hold(struct net_device *dev)
1081{
1082 atomic_inc(&dev->refcnt);
1083}
1da177e4
LT		 1084
1085/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1086 * and _off may be called from IRQ context, but it is caller
1087 * who is responsible for serialization of these calls.
b00055aa
SR		 1088 *
1089 * The name carrier is inappropriate, these functions should really be
1090 * called netif_lowerlayer_*() because they represent the state of any
1091 * kind of lower layer not just hardware media.
1da177e4
LT		 1092 */
1093
1094extern void linkwatch_fire_event(struct net_device *dev);
1095
bea3348e
SH		 1096/**
1097 * netif_carrier_ok - test if carrier present
1098 * @dev: network device
1099 *
1100 * Check if carrier is present on device
1101 */
1da177e4
LT		 1102static inline int netif_carrier_ok(const struct net_device *dev)
1103{
1104 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1105}
1106
1107extern void __netdev_watchdog_up(struct net_device *dev);
1108
0a242efc 1109extern void netif_carrier_on(struct net_device *dev);
1da177e4 1110
0a242efc 1111extern void netif_carrier_off(struct net_device *dev);
1da177e4 1112
bea3348e
SH		 1113/**
1114 * netif_dormant_on - mark device as dormant.
1115 * @dev: network device
1116 *
1117 * Mark device as dormant (as per RFC2863).
1118 *
1119 * The dormant state indicates that the relevant interface is not
1120 * actually in a condition to pass packets (i.e., it is not 'up') but is
1121 * in a "pending" state, waiting for some external event. For "on-
1122 * demand" interfaces, this new state identifies the situation where the
1123 * interface is waiting for events to place it in the up state.
1124 *
1125 */
b00055aa
SR		 1126static inline void netif_dormant_on(struct net_device *dev)
1127{
1128 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1129 linkwatch_fire_event(dev);
1130}
1131
bea3348e
SH		 1132/**
1133 * netif_dormant_off - set device as not dormant.
1134 * @dev: network device
1135 *
1136 * Device is not in dormant state.
1137 */
b00055aa
SR		 1138static inline void netif_dormant_off(struct net_device *dev)
1139{
1140 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1141 linkwatch_fire_event(dev);
1142}
1143
bea3348e
SH		 1144/**
1145 * netif_dormant - test if carrier present
1146 * @dev: network device
1147 *
1148 * Check if carrier is present on device
1149 */
b00055aa
SR		 1150static inline int netif_dormant(const struct net_device *dev)
1151{
1152 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1153}
1154
1155
bea3348e
SH		 1156/**
1157 * netif_oper_up - test if device is operational
1158 * @dev: network device
1159 *
1160 * Check if carrier is operational
1161 */
b00055aa
SR		 1162static inline int netif_oper_up(const struct net_device *dev) {
1163 return (dev->operstate == IF_OPER_UP ||
1164 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1165}
1166
bea3348e
SH		 1167/**
1168 * netif_device_present - is device available or removed
1169 * @dev: network device
1170 *
1171 * Check if device has not been removed from system.
1172 */
1da177e4
LT		 1173static inline int netif_device_present(struct net_device *dev)
1174{
1175 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1176}
1177
56079431 1178extern void netif_device_detach(struct net_device *dev);
1da177e4 1179
56079431 1180extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 1181
1182/*
1183 * Network interface message level settings
1184 */
1185#define HAVE_NETIF_MSG 1
1186
1187enum {
1188 NETIF_MSG_DRV = 0x0001,
1189 NETIF_MSG_PROBE = 0x0002,
1190 NETIF_MSG_LINK = 0x0004,
1191 NETIF_MSG_TIMER = 0x0008,
1192 NETIF_MSG_IFDOWN = 0x0010,
1193 NETIF_MSG_IFUP = 0x0020,
1194 NETIF_MSG_RX_ERR = 0x0040,
1195 NETIF_MSG_TX_ERR = 0x0080,
1196 NETIF_MSG_TX_QUEUED = 0x0100,
1197 NETIF_MSG_INTR = 0x0200,
1198 NETIF_MSG_TX_DONE = 0x0400,
1199 NETIF_MSG_RX_STATUS = 0x0800,
1200 NETIF_MSG_PKTDATA = 0x1000,
1201 NETIF_MSG_HW = 0x2000,
1202 NETIF_MSG_WOL = 0x4000,
1203};
1204
1205#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1206#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1207#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1208#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1209#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1210#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1211#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1212#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1213#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1214#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1215#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1216#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1217#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1218#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1219#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1220
1221static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1222{
1223 /* use default */
1224 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1225 return default_msg_enable_bits;
1226 if (debug_value == 0) /* no output */
1227 return 0;
1228 /* set low N bits */
1229 return (1 << debug_value) - 1;
1230}
1231
0a122576 1232/* Test if receive needs to be scheduled but only if up */
bea3348e
SH		 1233static inline int netif_rx_schedule_prep(struct net_device *dev,
1234 struct napi_struct *napi)
1da177e4 1235{
bea3348e 1236 return netif_running(dev) && napi_schedule_prep(napi);
1da177e4
LT		 1237}
1238
1239/* Add interface to tail of rx poll list. This assumes that _prep has
1240 * already been called and returned 1.
1241 */
bea3348e
SH		 1242static inline void __netif_rx_schedule(struct net_device *dev,
1243 struct napi_struct *napi)
1244{
1245 dev_hold(dev);
1246 __napi_schedule(napi);
1247}
1da177e4
LT		 1248
1249/* Try to reschedule poll. Called by irq handler. */
1250
bea3348e
SH		 1251static inline void netif_rx_schedule(struct net_device *dev,
1252 struct napi_struct *napi)
1da177e4 1253{
bea3348e
SH		 1254 if (netif_rx_schedule_prep(dev, napi))
1255 __netif_rx_schedule(dev, napi);
1da177e4
LT		 1256}
1257
bea3348e
SH		 1258/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1259static inline int netif_rx_reschedule(struct net_device *dev,
1260 struct napi_struct *napi)
1da177e4 1261{
bea3348e
SH		 1262 if (napi_schedule_prep(napi)) {
1263 __netif_rx_schedule(dev, napi);
1da177e4
LT		 1264 return 1;
1265 }
1266 return 0;
1267}
1268
b0ba6667
HX		 1269/* same as netif_rx_complete, except that local_irq_save(flags)
1270 * has already been issued
1271 */
bea3348e
SH		 1272static inline void __netif_rx_complete(struct net_device *dev,
1273 struct napi_struct *napi)
b0ba6667 1274{
bea3348e
SH		 1275 __napi_complete(napi);
1276 dev_put(dev);
b0ba6667
HX		 1277}
1278
1da177e4
LT		 1279/* Remove interface from poll list: it must be in the poll list
1280 * on current cpu. This primitive is called by dev->poll(), when
1281 * it completes the work. The device cannot be out of poll list at this
1282 * moment, it is BUG().
1283 */
bea3348e
SH		 1284static inline void netif_rx_complete(struct net_device *dev,
1285 struct napi_struct *napi)
1da177e4
LT		 1286{
1287 unsigned long flags;
1288
1289 local_irq_save(flags);
bea3348e 1290 __netif_rx_complete(dev, napi);
1da177e4
LT		 1291 local_irq_restore(flags);
1292}
1293
bea3348e
SH		 1294/**
1295 * netif_tx_lock - grab network device transmit lock
1296 * @dev: network device
c4ea43c5 1297 * @cpu: cpu number of lock owner
bea3348e
SH		 1298 *
1299 * Get network device transmit lock
1300 */
22dd7495 1301static inline void __netif_tx_lock(struct net_device *dev, int cpu)
932ff279
HX		 1302{
1303 spin_lock(&dev->_xmit_lock);
22dd7495
JHS		 1304 dev->xmit_lock_owner = cpu;
1305}
1306
1307static inline void netif_tx_lock(struct net_device *dev)
1308{
1309 __netif_tx_lock(dev, smp_processor_id());
932ff279
HX		 1310}
1311
1312static inline void netif_tx_lock_bh(struct net_device *dev)
1313{
1314 spin_lock_bh(&dev->_xmit_lock);
1315 dev->xmit_lock_owner = smp_processor_id();
1316}
1317
1318static inline int netif_tx_trylock(struct net_device *dev)
1319{
53c4b2cc
HX		 1320 int ok = spin_trylock(&dev->_xmit_lock);
1321 if (likely(ok))
932ff279 1322 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 1323 return ok;
932ff279
HX		 1324}
1325
1326static inline void netif_tx_unlock(struct net_device *dev)
1327{
1328 dev->xmit_lock_owner = -1;
1329 spin_unlock(&dev->_xmit_lock);
1330}
1331
1332static inline void netif_tx_unlock_bh(struct net_device *dev)
1333{
1334 dev->xmit_lock_owner = -1;
1335 spin_unlock_bh(&dev->_xmit_lock);
1336}
1337
22dd7495
JHS		 1338#define HARD_TX_LOCK(dev, cpu) { \
1339 if ((dev->features & NETIF_F_LLTX) == 0) { \
1340 __netif_tx_lock(dev, cpu); \
1341 } \
1342}
1343
1344#define HARD_TX_UNLOCK(dev) { \
1345 if ((dev->features & NETIF_F_LLTX) == 0) { \
1346 netif_tx_unlock(dev); \
1347 } \
1348}
1349
1da177e4
LT		 1350static inline void netif_tx_disable(struct net_device *dev)
1351{
932ff279 1352 netif_tx_lock_bh(dev);
1da177e4 1353 netif_stop_queue(dev);
932ff279 1354 netif_tx_unlock_bh(dev);
1da177e4
LT		 1355}
1356
1357/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1358
1359extern void ether_setup(struct net_device *dev);
1360
1361/* Support for loadable net-drivers */
f25f4e44
PWJ		 1362extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1363 void (*setup)(struct net_device *),
1364 unsigned int queue_count);
1365#define alloc_netdev(sizeof_priv, name, setup) \
1366 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1da177e4
LT		 1367extern int register_netdev(struct net_device *dev);
1368extern void unregister_netdev(struct net_device *dev);
4417da66
PM		 1369/* Functions used for secondary unicast and multicast support */
1370extern void dev_set_rx_mode(struct net_device *dev);
1371extern void __dev_set_rx_mode(struct net_device *dev);
1372extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1373extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1da177e4
LT		 1374extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1375extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
a0a400d7
PM		 1376extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1377extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
61cbc2fc
PM		 1378extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1379extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1da177e4
LT		 1380extern void dev_set_promiscuity(struct net_device *dev, int inc);
1381extern void dev_set_allmulti(struct net_device *dev, int inc);
1382extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1383extern void netdev_features_change(struct net_device *dev);
1da177e4 1384/* Load a device via the kmod */
881d966b 1385extern void dev_load(struct net *net, const char *name);
1da177e4
LT		 1386extern void dev_mcast_init(void);
1387extern int netdev_max_backlog;
1388extern int weight_p;
1389extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1390extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1391extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1392#ifdef CONFIG_BUG
1393extern void netdev_rx_csum_fault(struct net_device *dev);
1394#else
1395static inline void netdev_rx_csum_fault(struct net_device *dev)
1396{
1397}
1398#endif
1da177e4
LT		 1399/* rx skb timestamps */
1400extern void net_enable_timestamp(void);
1401extern void net_disable_timestamp(void);
1402
20380731
ACM		 1403#ifdef CONFIG_PROC_FS
1404extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1405extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1406extern void dev_seq_stop(struct seq_file *seq, void *v);
1407#endif
1408
1409extern void linkwatch_run_queue(void);
1410
7f353bf2
HX		 1411extern int netdev_compute_features(unsigned long all, unsigned long one);
1412
bcd76111 1413static inline int net_gso_ok(int features, int gso_type)
576a30eb 1414{
bcd76111 1415 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1416 return (features & feature) == feature;
576a30eb
HX		 1417}
1418
bcd76111
HX		 1419static inline int skb_gso_ok(struct sk_buff *skb, int features)
1420{
a430a43d 1421 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1422}
1423
7967168c
HX		 1424static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1425{
a430a43d
HX		 1426 return skb_is_gso(skb) &&
1427 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1428 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1429}
1430
7ea49ed7 1431/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1432 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1433 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1434 */
1435static inline int skb_bond_should_drop(struct sk_buff *skb)
1436{
1437 struct net_device *dev = skb->dev;
1438 struct net_device *master = dev->master;
1439
1440 if (master &&
1441 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1442 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1443 skb->protocol == __constant_htons(ETH_P_ARP))
1444 return 0;
1445
7ea49ed7
DM		 1446 if (master->priv_flags & IFF_MASTER_ALB) {
1447 if (skb->pkt_type != PACKET_BROADCAST &&
1448 skb->pkt_type != PACKET_MULTICAST)
1449 return 0;
1450 }
1451 if (master->priv_flags & IFF_MASTER_8023AD &&
1452 skb->protocol == __constant_htons(ETH_P_SLOW))
1453 return 0;
1454
1455 return 1;
1456 }
1457 return 0;
1458}
1459
1da177e4
LT		 1460#endif /* __KERNEL__ */
1461
1462#endif /* _LINUX_DEV_H */
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