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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>
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
253/* These flag bits are private to the generic network queueing
254 * layer, they may not be explicitly referenced by any other
255 * code.
256 */
257
258enum netdev_state_t
259{
260 __LINK_STATE_XOFF=0,
261 __LINK_STATE_START,
262 __LINK_STATE_PRESENT,
263 __LINK_STATE_SCHED,
264 __LINK_STATE_NOCARRIER,
b00055aa
SR
265 __LINK_STATE_LINKWATCH_PENDING,
266 __LINK_STATE_DORMANT,
48d83325 267 __LINK_STATE_QDISC_RUNNING,
1da177e4
LT
268};
269
270
271/*
272 * This structure holds at boot time configured netdevice settings. They
273 * are then used in the device probing.
274 */
275struct netdev_boot_setup {
276 char name[IFNAMSIZ];
277 struct ifmap map;
278};
279#define NETDEV_BOOT_SETUP_MAX 8
280
20380731 281extern int __init netdev_boot_setup(char *str);
1da177e4 282
bea3348e
SH
283/*
284 * Structure for NAPI scheduling similar to tasklet but with weighting
285 */
286struct napi_struct {
287 /* The poll_list must only be managed by the entity which
288 * changes the state of the NAPI_STATE_SCHED bit. This means
289 * whoever atomically sets that bit can add this napi_struct
290 * to the per-cpu poll_list, and whoever clears that bit
291 * can remove from the list right before clearing the bit.
292 */
293 struct list_head poll_list;
294
295 unsigned long state;
296 int weight;
297 int (*poll)(struct napi_struct *, int);
298#ifdef CONFIG_NETPOLL
299 spinlock_t poll_lock;
300 int poll_owner;
301 struct net_device *dev;
302 struct list_head dev_list;
303#endif
304};
305
306enum
307{
308 NAPI_STATE_SCHED, /* Poll is scheduled */
309};
310
311extern void FASTCALL(__napi_schedule(struct napi_struct *n));
312
313/**
314 * napi_schedule_prep - check if napi can be scheduled
315 * @n: napi context
316 *
317 * Test if NAPI routine is already running, and if not mark
318 * it as running. This is used as a condition variable
319 * insure only one NAPI poll instance runs
320 */
321static inline int napi_schedule_prep(struct napi_struct *n)
322{
323 return !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
324}
325
326/**
327 * napi_schedule - schedule NAPI poll
328 * @n: napi context
329 *
330 * Schedule NAPI poll routine to be called if it is not already
331 * running.
332 */
333static inline void napi_schedule(struct napi_struct *n)
334{
335 if (napi_schedule_prep(n))
336 __napi_schedule(n);
337}
338
339/**
340 * napi_complete - NAPI processing complete
341 * @n: napi context
342 *
343 * Mark NAPI processing as complete.
344 */
345static inline void __napi_complete(struct napi_struct *n)
346{
347 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
348 list_del(&n->poll_list);
349 smp_mb__before_clear_bit();
350 clear_bit(NAPI_STATE_SCHED, &n->state);
351}
352
353static inline void napi_complete(struct napi_struct *n)
354{
355 local_irq_disable();
356 __napi_complete(n);
357 local_irq_enable();
358}
359
360/**
361 * napi_disable - prevent NAPI from scheduling
362 * @n: napi context
363 *
364 * Stop NAPI from being scheduled on this context.
365 * Waits till any outstanding processing completes.
366 */
367static inline void napi_disable(struct napi_struct *n)
368{
369 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
370 msleep_interruptible(1);
371}
372
373/**
374 * napi_enable - enable NAPI scheduling
375 * @n: napi context
376 *
377 * Resume NAPI from being scheduled on this context.
378 * Must be paired with napi_disable.
379 */
380static inline void napi_enable(struct napi_struct *n)
381{
382 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
383 smp_mb__before_clear_bit();
384 clear_bit(NAPI_STATE_SCHED, &n->state);
385}
386
1da177e4
LT
387/*
388 * The DEVICE structure.
389 * Actually, this whole structure is a big mistake. It mixes I/O
390 * data with strictly "high-level" data, and it has to know about
391 * almost every data structure used in the INET module.
392 *
393 * FIXME: cleanup struct net_device such that network protocol info
394 * moves out.
395 */
396
397struct net_device
398{
399
400 /*
401 * This is the first field of the "visible" part of this structure
402 * (i.e. as seen by users in the "Space.c" file). It is the name
403 * the interface.
404 */
405 char name[IFNAMSIZ];
9356b8fc
ED
406 /* device name hash chain */
407 struct hlist_node name_hlist;
1da177e4
LT
408
409 /*
410 * I/O specific fields
411 * FIXME: Merge these and struct ifmap into one
412 */
413 unsigned long mem_end; /* shared mem end */
414 unsigned long mem_start; /* shared mem start */
415 unsigned long base_addr; /* device I/O address */
416 unsigned int irq; /* device IRQ number */
417
418 /*
419 * Some hardware also needs these fields, but they are not
420 * part of the usual set specified in Space.c.
421 */
422
423 unsigned char if_port; /* Selectable AUI, TP,..*/
424 unsigned char dma; /* DMA channel */
425
426 unsigned long state;
427
7562f876 428 struct list_head dev_list;
bea3348e
SH
429#ifdef CONFIG_NETPOLL
430 struct list_head napi_list;
431#endif
1da177e4
LT
432
433 /* The device initialization function. Called only once. */
434 int (*init)(struct net_device *dev);
435
436 /* ------- Fields preinitialized in Space.c finish here ------- */
437
9356b8fc
ED
438 /* Net device features */
439 unsigned long features;
440#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 441#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED
442#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
443#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 444#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED
445#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
446#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
447#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
448#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
449#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
450#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 451#define NETIF_F_GSO 2048 /* Enable software GSO. */
9356b8fc 452#define NETIF_F_LLTX 4096 /* LockLess TX */
ce286d32 453#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
f25f4e44 454#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
3ae7c0b2 455#define NETIF_F_LRO 32768 /* large receive offload */
7967168c
HX
456
457 /* Segmentation offload features */
458#define NETIF_F_GSO_SHIFT 16
bcd76111 459#define NETIF_F_GSO_MASK 0xffff0000
7967168c 460#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 461#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 462#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX
463#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
464#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 465
78eb8877
HX
466 /* List of features with software fallbacks. */
467#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
468
d212f87b 469
8648b305 470#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH
471#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
472#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
473#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 474
1da177e4
LT
475 struct net_device *next_sched;
476
477 /* Interface index. Unique device identifier */
478 int ifindex;
479 int iflink;
480
481
482 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 483 struct net_device_stats stats;
1da177e4 484
b86e0280 485#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT
486 /* List of functions to handle Wireless Extensions (instead of ioctl).
487 * See <net/iw_handler.h> for details. Jean II */
488 const struct iw_handler_def * wireless_handlers;
489 /* Instance data managed by the core of Wireless Extensions. */
490 struct iw_public_data * wireless_data;
b86e0280 491#endif
76fd8593 492 const struct ethtool_ops *ethtool_ops;
1da177e4
LT
493
494 /*
495 * This marks the end of the "visible" part of the structure. All
496 * fields hereafter are internal to the system, and may change at
497 * will (read: may be cleaned up at will).
498 */
499
1da177e4 500
b00055aa 501 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT
502 unsigned short gflags;
503 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
504 unsigned short padded; /* How much padding added by alloc_netdev() */
505
b00055aa
SR
506 unsigned char operstate; /* RFC2863 operstate */
507 unsigned char link_mode; /* mapping policy to operstate */
508
1da177e4
LT
509 unsigned mtu; /* interface MTU value */
510 unsigned short type; /* interface hardware type */
511 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT
512
513 struct net_device *master; /* Pointer to master device of a group,
514 * which this device is member of.
515 */
516
517 /* Interface address info. */
a6f9a705 518 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT
519 unsigned char addr_len; /* hardware address length */
520 unsigned short dev_id; /* for shared network cards */
521
4417da66
PM
522 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
523 int uc_count; /* Number of installed ucasts */
524 int uc_promisc;
3fba5a8b 525 struct dev_addr_list *mc_list; /* Multicast mac addresses */
1da177e4
LT
526 int mc_count; /* Number of installed mcasts */
527 int promiscuity;
528 int allmulti;
529
1da177e4
LT
530
531 /* Protocol specific pointers */
532
533 void *atalk_ptr; /* AppleTalk link */
534 void *ip_ptr; /* IPv4 specific data */
535 void *dn_ptr; /* DECnet specific data */
536 void *ip6_ptr; /* IPv6 specific data */
537 void *ec_ptr; /* Econet specific data */
538 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB
539 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
540 assign before registering */
1da177e4 541
9356b8fc
ED
542/*
543 * Cache line mostly used on receive path (including eth_type_trans())
544 */
9356b8fc
ED
545 unsigned long last_rx; /* Time of last Rx */
546 /* Interface address info used in eth_type_trans() */
547 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
548 because most packets are unicast) */
549
550 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 551
9356b8fc
ED
552/*
553 * Cache line mostly used on queue transmit path (qdisc)
554 */
555 /* device queue lock */
556 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT
557 struct Qdisc *qdisc;
558 struct Qdisc *qdisc_sleeping;
1da177e4
LT
559 struct list_head qdisc_list;
560 unsigned long tx_queue_len; /* Max frames per queue allowed */
561
f6a78bfc
HX
562 /* Partially transmitted GSO packet. */
563 struct sk_buff *gso_skb;
564
1da177e4
LT
565 /* ingress path synchronizer */
566 spinlock_t ingress_lock;
9356b8fc
ED
567 struct Qdisc *qdisc_ingress;
568
569/*
570 * One part is mostly used on xmit path (device)
571 */
1da177e4 572 /* hard_start_xmit synchronizer */
932ff279 573 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT
574 /* cpu id of processor entered to hard_start_xmit or -1,
575 if nobody entered there.
576 */
577 int xmit_lock_owner;
9356b8fc
ED
578 void *priv; /* pointer to private data */
579 int (*hard_start_xmit) (struct sk_buff *skb,
580 struct net_device *dev);
581 /* These may be needed for future network-power-down code. */
582 unsigned long trans_start; /* Time (in jiffies) of last Tx */
583
584 int watchdog_timeo; /* used by dev_watchdog() */
585 struct timer_list watchdog_timer;
586
587/*
588 * refcnt is a very hot point, so align it on SMP
589 */
1da177e4 590 /* Number of references to this device */
9356b8fc
ED
591 atomic_t refcnt ____cacheline_aligned_in_smp;
592
1da177e4
LT
593 /* delayed register/unregister */
594 struct list_head todo_list;
1da177e4
LT
595 /* device index hash chain */
596 struct hlist_node index_hlist;
597
572a103d
HX
598 struct net_device *link_watch_next;
599
1da177e4
LT
600 /* register/unregister state machine */
601 enum { NETREG_UNINITIALIZED=0,
b17a7c17 602 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT
603 NETREG_UNREGISTERING, /* called unregister_netdevice */
604 NETREG_UNREGISTERED, /* completed unregister todo */
605 NETREG_RELEASED, /* called free_netdev */
606 } reg_state;
607
1da177e4
LT
608 /* Called after device is detached from network. */
609 void (*uninit)(struct net_device *dev);
610 /* Called after last user reference disappears. */
611 void (*destructor)(struct net_device *dev);
612
613 /* Pointers to interface service routines. */
614 int (*open)(struct net_device *dev);
615 int (*stop)(struct net_device *dev);
1da177e4 616#define HAVE_NETDEV_POLL
1da177e4
LT
617 int (*hard_header) (struct sk_buff *skb,
618 struct net_device *dev,
619 unsigned short type,
620 void *daddr,
621 void *saddr,
622 unsigned len);
623 int (*rebuild_header)(struct sk_buff *skb);
24023451
PM
624#define HAVE_CHANGE_RX_FLAGS
625 void (*change_rx_flags)(struct net_device *dev,
626 int flags);
4417da66
PM
627#define HAVE_SET_RX_MODE
628 void (*set_rx_mode)(struct net_device *dev);
1da177e4
LT
629#define HAVE_MULTICAST
630 void (*set_multicast_list)(struct net_device *dev);
631#define HAVE_SET_MAC_ADDR
632 int (*set_mac_address)(struct net_device *dev,
633 void *addr);
634#define HAVE_PRIVATE_IOCTL
635 int (*do_ioctl)(struct net_device *dev,
636 struct ifreq *ifr, int cmd);
637#define HAVE_SET_CONFIG
638 int (*set_config)(struct net_device *dev,
639 struct ifmap *map);
640#define HAVE_HEADER_CACHE
641 int (*hard_header_cache)(struct neighbour *neigh,
642 struct hh_cache *hh);
643 void (*header_cache_update)(struct hh_cache *hh,
644 struct net_device *dev,
645 unsigned char * haddr);
646#define HAVE_CHANGE_MTU
647 int (*change_mtu)(struct net_device *dev, int new_mtu);
648
649#define HAVE_TX_TIMEOUT
650 void (*tx_timeout) (struct net_device *dev);
651
652 void (*vlan_rx_register)(struct net_device *dev,
653 struct vlan_group *grp);
654 void (*vlan_rx_add_vid)(struct net_device *dev,
655 unsigned short vid);
656 void (*vlan_rx_kill_vid)(struct net_device *dev,
657 unsigned short vid);
658
659 int (*hard_header_parse)(struct sk_buff *skb,
660 unsigned char *haddr);
661 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
662#ifdef CONFIG_NETPOLL
115c1d6e 663 struct netpoll_info *npinfo;
1da177e4
LT
664#endif
665#ifdef CONFIG_NET_POLL_CONTROLLER
666 void (*poll_controller)(struct net_device *dev);
667#endif
668
4a1c5371
EB
669 /* Network namespace this network device is inside */
670 struct net *nd_net;
671
1da177e4
LT
672 /* bridge stuff */
673 struct net_bridge_port *br_port;
b863ceb7
PM
674 /* macvlan */
675 struct macvlan_port *macvlan_port;
1da177e4 676
1da177e4 677 /* class/net/name entry */
43cb76d9 678 struct device dev;
fe9925b5
SH
679 /* space for optional statistics and wireless sysfs groups */
680 struct attribute_group *sysfs_groups[3];
38f7b870
PM
681
682 /* rtnetlink link ops */
683 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44
PWJ
684
685 /* The TX queue control structures */
686 unsigned int egress_subqueue_count;
31ce72a6 687 struct net_device_subqueue egress_subqueue[1];
1da177e4 688};
43cb76d9 689#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT
690
691#define NETDEV_ALIGN 32
692#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
693
bea3348e
SH
694/**
695 * netdev_priv - access network device private data
696 * @dev: network device
697 *
698 * Get network device private data
699 */
6472ce60 700static inline void *netdev_priv(const struct net_device *dev)
1da177e4 701{
f25f4e44 702 return dev->priv;
1da177e4
LT
703}
704
705#define SET_MODULE_OWNER(dev) do { } while (0)
706/* Set the sysfs physical device reference for the network logical device
707 * if set prior to registration will cause a symlink during initialization.
708 */
43cb76d9 709#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 710
bea3348e
SH
711static inline void netif_napi_add(struct net_device *dev,
712 struct napi_struct *napi,
713 int (*poll)(struct napi_struct *, int),
714 int weight)
715{
716 INIT_LIST_HEAD(&napi->poll_list);
717 napi->poll = poll;
718 napi->weight = weight;
719#ifdef CONFIG_NETPOLL
720 napi->dev = dev;
721 list_add(&napi->dev_list, &dev->napi_list);
722 spin_lock_init(&napi->poll_lock);
723 napi->poll_owner = -1;
724#endif
725 set_bit(NAPI_STATE_SCHED, &napi->state);
726}
727
1da177e4 728struct packet_type {
f2ccd8fa
DM
729 __be16 type; /* This is really htons(ether_type). */
730 struct net_device *dev; /* NULL is wildcarded here */
731 int (*func) (struct sk_buff *,
732 struct net_device *,
733 struct packet_type *,
734 struct net_device *);
576a30eb
HX
735 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
736 int features);
a430a43d 737 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT
738 void *af_packet_priv;
739 struct list_head list;
740};
741
742#include <linux/interrupt.h>
743#include <linux/notifier.h>
744
745extern struct net_device loopback_dev; /* The loopback */
1da177e4
LT
746extern rwlock_t dev_base_lock; /* Device list lock */
747
7562f876 748
881d966b
EB
749#define for_each_netdev(net, d) \
750 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
751#define for_each_netdev_safe(net, d, n) \
752 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
753#define for_each_netdev_continue(net, d) \
754 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
755#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 756
a050c33f
DL
757static inline struct net_device *next_net_device(struct net_device *dev)
758{
759 struct list_head *lh;
760 struct net *net;
761
762 net = dev->nd_net;
763 lh = dev->dev_list.next;
764 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
765}
766
767static inline struct net_device *first_net_device(struct net *net)
768{
769 return list_empty(&net->dev_base_head) ? NULL :
770 net_device_entry(net->dev_base_head.next);
771}
7562f876 772
1da177e4
LT
773extern int netdev_boot_setup_check(struct net_device *dev);
774extern unsigned long netdev_boot_base(const char *prefix, int unit);
881d966b
EB
775extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
776extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
777extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT
778extern void dev_add_pack(struct packet_type *pt);
779extern void dev_remove_pack(struct packet_type *pt);
780extern void __dev_remove_pack(struct packet_type *pt);
781
881d966b 782extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1da177e4 783 unsigned short mask);
881d966b
EB
784extern struct net_device *dev_get_by_name(struct net *net, const char *name);
785extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT
786extern int dev_alloc_name(struct net_device *dev, const char *name);
787extern int dev_open(struct net_device *dev);
788extern int dev_close(struct net_device *dev);
789extern int dev_queue_xmit(struct sk_buff *skb);
790extern int register_netdevice(struct net_device *dev);
22f8cde5 791extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT
792extern void free_netdev(struct net_device *dev);
793extern void synchronize_net(void);
794extern int register_netdevice_notifier(struct notifier_block *nb);
795extern int unregister_netdevice_notifier(struct notifier_block *nb);
796extern int call_netdevice_notifiers(unsigned long val, void *v);
881d966b
EB
797extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
798extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1da177e4
LT
799extern int dev_restart(struct net_device *dev);
800#ifdef CONFIG_NETPOLL_TRAP
801extern int netpoll_trap(void);
802#endif
803
804typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
805extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
806static inline int unregister_gifconf(unsigned int family)
807{
808 return register_gifconf(family, NULL);
809}
810
811/*
812 * Incoming packets are placed on per-cpu queues so that
813 * no locking is needed.
814 */
1da177e4
LT
815struct softnet_data
816{
31aa02c5 817 struct net_device *output_queue;
1da177e4
LT
818 struct sk_buff_head input_pkt_queue;
819 struct list_head poll_list;
1da177e4
LT
820 struct sk_buff *completion_queue;
821
bea3348e 822 struct napi_struct backlog;
db217334
CL
823#ifdef CONFIG_NET_DMA
824 struct dma_chan *net_dma;
825#endif
1da177e4
LT
826};
827
828DECLARE_PER_CPU(struct softnet_data,softnet_data);
829
830#define HAVE_NETIF_QUEUE
831
56079431 832extern void __netif_schedule(struct net_device *dev);
1da177e4
LT
833
834static inline void netif_schedule(struct net_device *dev)
835{
836 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
837 __netif_schedule(dev);
838}
839
bea3348e
SH
840/**
841 * netif_start_queue - allow transmit
842 * @dev: network device
843 *
844 * Allow upper layers to call the device hard_start_xmit routine.
845 */
1da177e4
LT
846static inline void netif_start_queue(struct net_device *dev)
847{
848 clear_bit(__LINK_STATE_XOFF, &dev->state);
849}
850
bea3348e
SH
851/**
852 * netif_wake_queue - restart transmit
853 * @dev: network device
854 *
855 * Allow upper layers to call the device hard_start_xmit routine.
856 * Used for flow control when transmit resources are available.
857 */
1da177e4
LT
858static inline void netif_wake_queue(struct net_device *dev)
859{
860#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS
861 if (netpoll_trap()) {
862 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 863 return;
5f286e11 864 }
1da177e4
LT
865#endif
866 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
867 __netif_schedule(dev);
868}
869
bea3348e
SH
870/**
871 * netif_stop_queue - stop transmitted packets
872 * @dev: network device
873 *
874 * Stop upper layers calling the device hard_start_xmit routine.
875 * Used for flow control when transmit resources are unavailable.
876 */
1da177e4
LT
877static inline void netif_stop_queue(struct net_device *dev)
878{
1da177e4
LT
879 set_bit(__LINK_STATE_XOFF, &dev->state);
880}
881
bea3348e
SH
882/**
883 * netif_queue_stopped - test if transmit queue is flowblocked
884 * @dev: network device
885 *
886 * Test if transmit queue on device is currently unable to send.
887 */
1da177e4
LT
888static inline int netif_queue_stopped(const struct net_device *dev)
889{
890 return test_bit(__LINK_STATE_XOFF, &dev->state);
891}
892
bea3348e
SH
893/**
894 * netif_running - test if up
895 * @dev: network device
896 *
897 * Test if the device has been brought up.
898 */
1da177e4
LT
899static inline int netif_running(const struct net_device *dev)
900{
901 return test_bit(__LINK_STATE_START, &dev->state);
902}
903
f25f4e44
PWJ
904/*
905 * Routines to manage the subqueues on a device. We only need start
906 * stop, and a check if it's stopped. All other device management is
907 * done at the overall netdevice level.
908 * Also test the device if we're multiqueue.
909 */
bea3348e
SH
910
911/**
912 * netif_start_subqueue - allow sending packets on subqueue
913 * @dev: network device
914 * @queue_index: sub queue index
915 *
916 * Start individual transmit queue of a device with multiple transmit queues.
917 */
f25f4e44
PWJ
918static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
919{
920#ifdef CONFIG_NETDEVICES_MULTIQUEUE
921 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
922#endif
923}
924
bea3348e
SH
925/**
926 * netif_stop_subqueue - stop sending packets on subqueue
927 * @dev: network device
928 * @queue_index: sub queue index
929 *
930 * Stop individual transmit queue of a device with multiple transmit queues.
931 */
f25f4e44
PWJ
932static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
933{
934#ifdef CONFIG_NETDEVICES_MULTIQUEUE
935#ifdef CONFIG_NETPOLL_TRAP
936 if (netpoll_trap())
937 return;
938#endif
939 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
940#endif
941}
942
bea3348e
SH
943/**
944 * netif_subqueue_stopped - test status of subqueue
945 * @dev: network device
946 * @queue_index: sub queue index
947 *
948 * Check individual transmit queue of a device with multiple transmit queues.
949 */
f25f4e44
PWJ
950static inline int netif_subqueue_stopped(const struct net_device *dev,
951 u16 queue_index)
952{
953#ifdef CONFIG_NETDEVICES_MULTIQUEUE
954 return test_bit(__LINK_STATE_XOFF,
955 &dev->egress_subqueue[queue_index].state);
956#else
957 return 0;
958#endif
959}
960
bea3348e
SH
961
962/**
963 * netif_wake_subqueue - allow sending packets on subqueue
964 * @dev: network device
965 * @queue_index: sub queue index
966 *
967 * Resume individual transmit queue of a device with multiple transmit queues.
968 */
f25f4e44
PWJ
969static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
970{
971#ifdef CONFIG_NETDEVICES_MULTIQUEUE
972#ifdef CONFIG_NETPOLL_TRAP
973 if (netpoll_trap())
974 return;
975#endif
976 if (test_and_clear_bit(__LINK_STATE_XOFF,
977 &dev->egress_subqueue[queue_index].state))
978 __netif_schedule(dev);
979#endif
980}
981
bea3348e
SH
982/**
983 * netif_is_multiqueue - test if device has multiple transmit queues
984 * @dev: network device
985 *
986 * Check if device has multiple transmit queues
987 * Always falls if NETDEVICE_MULTIQUEUE is not configured
988 */
f25f4e44
PWJ
989static inline int netif_is_multiqueue(const struct net_device *dev)
990{
991#ifdef CONFIG_NETDEVICES_MULTIQUEUE
992 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
993#else
994 return 0;
995#endif
996}
1da177e4
LT
997
998/* Use this variant when it is known for sure that it
999 * is executing from interrupt context.
1000 */
bea3348e 1001extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT
1002
1003/* Use this variant in places where it could be invoked
1004 * either from interrupt or non-interrupt context.
1005 */
56079431 1006extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT
1007
1008#define HAVE_NETIF_RX 1
1009extern int netif_rx(struct sk_buff *skb);
1010extern int netif_rx_ni(struct sk_buff *skb);
1011#define HAVE_NETIF_RECEIVE_SKB 1
1012extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 1013extern int dev_valid_name(const char *name);
881d966b
EB
1014extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1015extern int dev_ethtool(struct net *net, struct ifreq *);
1da177e4
LT
1016extern unsigned dev_get_flags(const struct net_device *);
1017extern int dev_change_flags(struct net_device *, unsigned);
1018extern int dev_change_name(struct net_device *, char *);
ce286d32
EB
1019extern int dev_change_net_namespace(struct net_device *,
1020 struct net *, const char *);
1da177e4
LT
1021extern int dev_set_mtu(struct net_device *, int);
1022extern int dev_set_mac_address(struct net_device *,
1023 struct sockaddr *);
f6a78bfc
HX
1024extern int dev_hard_start_xmit(struct sk_buff *skb,
1025 struct net_device *dev);
1da177e4 1026
20380731 1027extern int netdev_budget;
1da177e4
LT
1028
1029/* Called by rtnetlink.c:rtnl_unlock() */
1030extern void netdev_run_todo(void);
1031
bea3348e
SH
1032/**
1033 * dev_put - release reference to device
1034 * @dev: network device
1035 *
1036 * Hold reference to device to keep it from being freed.
1037 */
1da177e4
LT
1038static inline void dev_put(struct net_device *dev)
1039{
1040 atomic_dec(&dev->refcnt);
1041}
1042
bea3348e
SH
1043/**
1044 * dev_hold - get reference to device
1045 * @dev: network device
1046 *
1047 * Release reference to device to allow it to be freed.
1048 */
15333061
SH
1049static inline void dev_hold(struct net_device *dev)
1050{
1051 atomic_inc(&dev->refcnt);
1052}
1da177e4
LT
1053
1054/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1055 * and _off may be called from IRQ context, but it is caller
1056 * who is responsible for serialization of these calls.
b00055aa
SR
1057 *
1058 * The name carrier is inappropriate, these functions should really be
1059 * called netif_lowerlayer_*() because they represent the state of any
1060 * kind of lower layer not just hardware media.
1da177e4
LT
1061 */
1062
1063extern void linkwatch_fire_event(struct net_device *dev);
1064
bea3348e
SH
1065/**
1066 * netif_carrier_ok - test if carrier present
1067 * @dev: network device
1068 *
1069 * Check if carrier is present on device
1070 */
1da177e4
LT
1071static inline int netif_carrier_ok(const struct net_device *dev)
1072{
1073 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1074}
1075
1076extern void __netdev_watchdog_up(struct net_device *dev);
1077
0a242efc 1078extern void netif_carrier_on(struct net_device *dev);
1da177e4 1079
0a242efc 1080extern void netif_carrier_off(struct net_device *dev);
1da177e4 1081
bea3348e
SH
1082/**
1083 * netif_dormant_on - mark device as dormant.
1084 * @dev: network device
1085 *
1086 * Mark device as dormant (as per RFC2863).
1087 *
1088 * The dormant state indicates that the relevant interface is not
1089 * actually in a condition to pass packets (i.e., it is not 'up') but is
1090 * in a "pending" state, waiting for some external event. For "on-
1091 * demand" interfaces, this new state identifies the situation where the
1092 * interface is waiting for events to place it in the up state.
1093 *
1094 */
b00055aa
SR
1095static inline void netif_dormant_on(struct net_device *dev)
1096{
1097 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1098 linkwatch_fire_event(dev);
1099}
1100
bea3348e
SH
1101/**
1102 * netif_dormant_off - set device as not dormant.
1103 * @dev: network device
1104 *
1105 * Device is not in dormant state.
1106 */
b00055aa
SR
1107static inline void netif_dormant_off(struct net_device *dev)
1108{
1109 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1110 linkwatch_fire_event(dev);
1111}
1112
bea3348e
SH
1113/**
1114 * netif_dormant - test if carrier present
1115 * @dev: network device
1116 *
1117 * Check if carrier is present on device
1118 */
b00055aa
SR
1119static inline int netif_dormant(const struct net_device *dev)
1120{
1121 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1122}
1123
1124
bea3348e
SH
1125/**
1126 * netif_oper_up - test if device is operational
1127 * @dev: network device
1128 *
1129 * Check if carrier is operational
1130 */
b00055aa
SR
1131static inline int netif_oper_up(const struct net_device *dev) {
1132 return (dev->operstate == IF_OPER_UP ||
1133 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1134}
1135
bea3348e
SH
1136/**
1137 * netif_device_present - is device available or removed
1138 * @dev: network device
1139 *
1140 * Check if device has not been removed from system.
1141 */
1da177e4
LT
1142static inline int netif_device_present(struct net_device *dev)
1143{
1144 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1145}
1146
56079431 1147extern void netif_device_detach(struct net_device *dev);
1da177e4 1148
56079431 1149extern void netif_device_attach(struct net_device *dev);
1da177e4
LT
1150
1151/*
1152 * Network interface message level settings
1153 */
1154#define HAVE_NETIF_MSG 1
1155
1156enum {
1157 NETIF_MSG_DRV = 0x0001,
1158 NETIF_MSG_PROBE = 0x0002,
1159 NETIF_MSG_LINK = 0x0004,
1160 NETIF_MSG_TIMER = 0x0008,
1161 NETIF_MSG_IFDOWN = 0x0010,
1162 NETIF_MSG_IFUP = 0x0020,
1163 NETIF_MSG_RX_ERR = 0x0040,
1164 NETIF_MSG_TX_ERR = 0x0080,
1165 NETIF_MSG_TX_QUEUED = 0x0100,
1166 NETIF_MSG_INTR = 0x0200,
1167 NETIF_MSG_TX_DONE = 0x0400,
1168 NETIF_MSG_RX_STATUS = 0x0800,
1169 NETIF_MSG_PKTDATA = 0x1000,
1170 NETIF_MSG_HW = 0x2000,
1171 NETIF_MSG_WOL = 0x4000,
1172};
1173
1174#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1175#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1176#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1177#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1178#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1179#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1180#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1181#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1182#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1183#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1184#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1185#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1186#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1187#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1188#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1189
1190static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1191{
1192 /* use default */
1193 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1194 return default_msg_enable_bits;
1195 if (debug_value == 0) /* no output */
1196 return 0;
1197 /* set low N bits */
1198 return (1 << debug_value) - 1;
1199}
1200
0a122576 1201/* Test if receive needs to be scheduled but only if up */
bea3348e
SH
1202static inline int netif_rx_schedule_prep(struct net_device *dev,
1203 struct napi_struct *napi)
1da177e4 1204{
bea3348e 1205 return netif_running(dev) && napi_schedule_prep(napi);
1da177e4
LT
1206}
1207
1208/* Add interface to tail of rx poll list. This assumes that _prep has
1209 * already been called and returned 1.
1210 */
bea3348e
SH
1211static inline void __netif_rx_schedule(struct net_device *dev,
1212 struct napi_struct *napi)
1213{
1214 dev_hold(dev);
1215 __napi_schedule(napi);
1216}
1da177e4
LT
1217
1218/* Try to reschedule poll. Called by irq handler. */
1219
bea3348e
SH
1220static inline void netif_rx_schedule(struct net_device *dev,
1221 struct napi_struct *napi)
1da177e4 1222{
bea3348e
SH
1223 if (netif_rx_schedule_prep(dev, napi))
1224 __netif_rx_schedule(dev, napi);
1da177e4
LT
1225}
1226
bea3348e
SH
1227/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1228static inline int netif_rx_reschedule(struct net_device *dev,
1229 struct napi_struct *napi)
1da177e4 1230{
bea3348e
SH
1231 if (napi_schedule_prep(napi)) {
1232 __netif_rx_schedule(dev, napi);
1da177e4
LT
1233 return 1;
1234 }
1235 return 0;
1236}
1237
b0ba6667
HX
1238/* same as netif_rx_complete, except that local_irq_save(flags)
1239 * has already been issued
1240 */
bea3348e
SH
1241static inline void __netif_rx_complete(struct net_device *dev,
1242 struct napi_struct *napi)
b0ba6667 1243{
bea3348e
SH
1244 __napi_complete(napi);
1245 dev_put(dev);
b0ba6667
HX
1246}
1247
1da177e4
LT
1248/* Remove interface from poll list: it must be in the poll list
1249 * on current cpu. This primitive is called by dev->poll(), when
1250 * it completes the work. The device cannot be out of poll list at this
1251 * moment, it is BUG().
1252 */
bea3348e
SH
1253static inline void netif_rx_complete(struct net_device *dev,
1254 struct napi_struct *napi)
1da177e4
LT
1255{
1256 unsigned long flags;
1257
1258 local_irq_save(flags);
bea3348e 1259 __netif_rx_complete(dev, napi);
1da177e4
LT
1260 local_irq_restore(flags);
1261}
1262
bea3348e
SH
1263/**
1264 * netif_tx_lock - grab network device transmit lock
1265 * @dev: network device
1266 *
1267 * Get network device transmit lock
1268 */
932ff279
HX
1269static inline void netif_tx_lock(struct net_device *dev)
1270{
1271 spin_lock(&dev->_xmit_lock);
1272 dev->xmit_lock_owner = smp_processor_id();
1273}
1274
1275static inline void netif_tx_lock_bh(struct net_device *dev)
1276{
1277 spin_lock_bh(&dev->_xmit_lock);
1278 dev->xmit_lock_owner = smp_processor_id();
1279}
1280
1281static inline int netif_tx_trylock(struct net_device *dev)
1282{
53c4b2cc
HX
1283 int ok = spin_trylock(&dev->_xmit_lock);
1284 if (likely(ok))
932ff279 1285 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 1286 return ok;
932ff279
HX
1287}
1288
1289static inline void netif_tx_unlock(struct net_device *dev)
1290{
1291 dev->xmit_lock_owner = -1;
1292 spin_unlock(&dev->_xmit_lock);
1293}
1294
1295static inline void netif_tx_unlock_bh(struct net_device *dev)
1296{
1297 dev->xmit_lock_owner = -1;
1298 spin_unlock_bh(&dev->_xmit_lock);
1299}
1300
1da177e4
LT
1301static inline void netif_tx_disable(struct net_device *dev)
1302{
932ff279 1303 netif_tx_lock_bh(dev);
1da177e4 1304 netif_stop_queue(dev);
932ff279 1305 netif_tx_unlock_bh(dev);
1da177e4
LT
1306}
1307
1308/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1309
1310extern void ether_setup(struct net_device *dev);
1311
1312/* Support for loadable net-drivers */
f25f4e44
PWJ
1313extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1314 void (*setup)(struct net_device *),
1315 unsigned int queue_count);
1316#define alloc_netdev(sizeof_priv, name, setup) \
1317 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1da177e4
LT
1318extern int register_netdev(struct net_device *dev);
1319extern void unregister_netdev(struct net_device *dev);
4417da66
PM
1320/* Functions used for secondary unicast and multicast support */
1321extern void dev_set_rx_mode(struct net_device *dev);
1322extern void __dev_set_rx_mode(struct net_device *dev);
1323extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1324extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1da177e4
LT
1325extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1326extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
a0a400d7
PM
1327extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1328extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
61cbc2fc
PM
1329extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1330extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1da177e4
LT
1331extern void dev_set_promiscuity(struct net_device *dev, int inc);
1332extern void dev_set_allmulti(struct net_device *dev, int inc);
1333extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1334extern void netdev_features_change(struct net_device *dev);
1da177e4 1335/* Load a device via the kmod */
881d966b 1336extern void dev_load(struct net *net, const char *name);
1da177e4
LT
1337extern void dev_mcast_init(void);
1338extern int netdev_max_backlog;
1339extern int weight_p;
1340extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1341extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1342extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX
1343#ifdef CONFIG_BUG
1344extern void netdev_rx_csum_fault(struct net_device *dev);
1345#else
1346static inline void netdev_rx_csum_fault(struct net_device *dev)
1347{
1348}
1349#endif
1da177e4
LT
1350/* rx skb timestamps */
1351extern void net_enable_timestamp(void);
1352extern void net_disable_timestamp(void);
1353
20380731
ACM
1354#ifdef CONFIG_PROC_FS
1355extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1356extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1357extern void dev_seq_stop(struct seq_file *seq, void *v);
1358#endif
1359
1360extern void linkwatch_run_queue(void);
1361
7f353bf2
HX
1362extern int netdev_compute_features(unsigned long all, unsigned long one);
1363
bcd76111 1364static inline int net_gso_ok(int features, int gso_type)
576a30eb 1365{
bcd76111 1366 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1367 return (features & feature) == feature;
576a30eb
HX
1368}
1369
bcd76111
HX
1370static inline int skb_gso_ok(struct sk_buff *skb, int features)
1371{
a430a43d 1372 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX
1373}
1374
7967168c
HX
1375static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1376{
a430a43d
HX
1377 return skb_is_gso(skb) &&
1378 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1379 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX
1380}
1381
7ea49ed7 1382/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV
1383 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1384 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM
1385 */
1386static inline int skb_bond_should_drop(struct sk_buff *skb)
1387{
1388 struct net_device *dev = skb->dev;
1389 struct net_device *master = dev->master;
1390
1391 if (master &&
1392 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV
1393 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1394 skb->protocol == __constant_htons(ETH_P_ARP))
1395 return 0;
1396
7ea49ed7
DM
1397 if (master->priv_flags & IFF_MASTER_ALB) {
1398 if (skb->pkt_type != PACKET_BROADCAST &&
1399 skb->pkt_type != PACKET_MULTICAST)
1400 return 0;
1401 }
1402 if (master->priv_flags & IFF_MASTER_8023AD &&
1403 skb->protocol == __constant_htons(ETH_P_SLOW))
1404 return 0;
1405
1406 return 1;
1407 }
1408 return 0;
1409}
1410
1da177e4
LT
1411#endif /* __KERNEL__ */
1412
1413#endif /* _LINUX_DEV_H */