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[NET]: Make and use skb_get_queue_mapping
[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
c264c3de
SH		 410#ifdef CONFIG_SMP
411/**
412 * napi_synchronize - wait until NAPI is not running
413 * @n: napi context
414 *
415 * Wait until NAPI is done being scheduled on this context.
416 * Waits till any outstanding processing completes but
417 * does not disable future activations.
418 */
419static inline void napi_synchronize(const struct napi_struct *n)
420{
421 while (test_bit(NAPI_STATE_SCHED, &n->state))
422 msleep(1);
423}
424#else
425# define napi_synchronize(n) barrier()
426#endif
427
1da177e4
LT		 428/*
429 * The DEVICE structure.
430 * Actually, this whole structure is a big mistake. It mixes I/O
431 * data with strictly "high-level" data, and it has to know about
432 * almost every data structure used in the INET module.
433 *
434 * FIXME: cleanup struct net_device such that network protocol info
435 * moves out.
436 */
437
438struct net_device
439{
440
441 /*
442 * This is the first field of the "visible" part of this structure
443 * (i.e. as seen by users in the "Space.c" file). It is the name
444 * the interface.
445 */
446 char name[IFNAMSIZ];
9356b8fc
ED		 447 /* device name hash chain */
448 struct hlist_node name_hlist;
1da177e4
LT		 449
450 /*
451 * I/O specific fields
452 * FIXME: Merge these and struct ifmap into one
453 */
454 unsigned long mem_end; /* shared mem end */
455 unsigned long mem_start; /* shared mem start */
456 unsigned long base_addr; /* device I/O address */
457 unsigned int irq; /* device IRQ number */
458
459 /*
460 * Some hardware also needs these fields, but they are not
461 * part of the usual set specified in Space.c.
462 */
463
464 unsigned char if_port; /* Selectable AUI, TP,..*/
465 unsigned char dma; /* DMA channel */
466
467 unsigned long state;
468
7562f876 469 struct list_head dev_list;
bea3348e
SH		 470#ifdef CONFIG_NETPOLL
471 struct list_head napi_list;
472#endif
1da177e4
LT		 473
474 /* The device initialization function. Called only once. */
475 int (*init)(struct net_device *dev);
476
477 /* ------- Fields preinitialized in Space.c finish here ------- */
478
9356b8fc
ED		 479 /* Net device features */
480 unsigned long features;
481#define NETIF_F_SG 1 /* Scatter/gather IO. */
d212f87b 482#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
9356b8fc
ED		 483#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
484#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
d212f87b 485#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
9356b8fc
ED		 486#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
487#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
488#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
489#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
490#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
491#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
37c3185a 492#define NETIF_F_GSO 2048 /* Enable software GSO. */
e24eb521
CB		 493#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
494 /* do not use LLTX in new drivers */
ce286d32 495#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
f25f4e44 496#define NETIF_F_MULTI_QUEUE 16384 /* Has multiple TX/RX queues */
3ae7c0b2 497#define NETIF_F_LRO 32768 /* large receive offload */
7967168c
HX		 498
499 /* Segmentation offload features */
500#define NETIF_F_GSO_SHIFT 16
bcd76111 501#define NETIF_F_GSO_MASK 0xffff0000
7967168c 502#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
f83ef8c0 503#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
576a30eb 504#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
f83ef8c0
HX		 505#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
506#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
9356b8fc 507
78eb8877
HX		 508 /* List of features with software fallbacks. */
509#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | NETIF_F_TSO6)
510
d212f87b 511
8648b305 512#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
d212f87b
SH		 513#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
514#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
515#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
8648b305 516
1da177e4
LT		 517 struct net_device *next_sched;
518
519 /* Interface index. Unique device identifier */
520 int ifindex;
521 int iflink;
522
523
524 struct net_device_stats* (*get_stats)(struct net_device *dev);
c45d286e 525 struct net_device_stats stats;
1da177e4 526
b86e0280 527#ifdef CONFIG_WIRELESS_EXT
1da177e4
LT		 528 /* List of functions to handle Wireless Extensions (instead of ioctl).
529 * See <net/iw_handler.h> for details. Jean II */
530 const struct iw_handler_def * wireless_handlers;
531 /* Instance data managed by the core of Wireless Extensions. */
532 struct iw_public_data * wireless_data;
b86e0280 533#endif
76fd8593 534 const struct ethtool_ops *ethtool_ops;
1da177e4 535
3b04ddde
SH		 536 /* Hardware header description */
537 const struct header_ops *header_ops;
538
1da177e4
LT		 539 /*
540 * This marks the end of the "visible" part of the structure. All
541 * fields hereafter are internal to the system, and may change at
542 * will (read: may be cleaned up at will).
543 */
544
1da177e4 545
b00055aa 546 unsigned int flags; /* interface flags (a la BSD) */
1da177e4
LT		 547 unsigned short gflags;
548 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
549 unsigned short padded; /* How much padding added by alloc_netdev() */
550
b00055aa
SR		 551 unsigned char operstate; /* RFC2863 operstate */
552 unsigned char link_mode; /* mapping policy to operstate */
553
1da177e4
LT		 554 unsigned mtu; /* interface MTU value */
555 unsigned short type; /* interface hardware type */
556 unsigned short hard_header_len; /* hardware hdr length */
1da177e4
LT		 557
558 struct net_device *master; /* Pointer to master device of a group,
559 * which this device is member of.
560 */
561
562 /* Interface address info. */
a6f9a705 563 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
1da177e4
LT		 564 unsigned char addr_len; /* hardware address length */
565 unsigned short dev_id; /* for shared network cards */
566
4417da66
PM		 567 struct dev_addr_list *uc_list; /* Secondary unicast mac addresses */
568 int uc_count; /* Number of installed ucasts */
569 int uc_promisc;
3fba5a8b 570 struct dev_addr_list *mc_list; /* Multicast mac addresses */
1da177e4
LT		 571 int mc_count; /* Number of installed mcasts */
572 int promiscuity;
573 int allmulti;
574
1da177e4
LT		 575
576 /* Protocol specific pointers */
577
578 void *atalk_ptr; /* AppleTalk link */
579 void *ip_ptr; /* IPv4 specific data */
580 void *dn_ptr; /* DECnet specific data */
581 void *ip6_ptr; /* IPv6 specific data */
582 void *ec_ptr; /* Econet specific data */
583 void *ax25_ptr; /* AX.25 specific data */
704232c2
JB		 584 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
585 assign before registering */
1da177e4 586
9356b8fc
ED		 587/*
588 * Cache line mostly used on receive path (including eth_type_trans())
589 */
9356b8fc
ED		 590 unsigned long last_rx; /* Time of last Rx */
591 /* Interface address info used in eth_type_trans() */
592 unsigned char dev_addr[MAX_ADDR_LEN]; /* hw address, (before bcast
593 because most packets are unicast) */
594
595 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1da177e4 596
9356b8fc
ED		 597/*
598 * Cache line mostly used on queue transmit path (qdisc)
599 */
600 /* device queue lock */
601 spinlock_t queue_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 602 struct Qdisc *qdisc;
603 struct Qdisc *qdisc_sleeping;
1da177e4
LT		 604 struct list_head qdisc_list;
605 unsigned long tx_queue_len; /* Max frames per queue allowed */
606
f6a78bfc
HX		 607 /* Partially transmitted GSO packet. */
608 struct sk_buff *gso_skb;
609
1da177e4
LT		 610 /* ingress path synchronizer */
611 spinlock_t ingress_lock;
9356b8fc
ED		 612 struct Qdisc *qdisc_ingress;
613
614/*
615 * One part is mostly used on xmit path (device)
616 */
1da177e4 617 /* hard_start_xmit synchronizer */
932ff279 618 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
1da177e4
LT		 619 /* cpu id of processor entered to hard_start_xmit or -1,
620 if nobody entered there.
621 */
622 int xmit_lock_owner;
9356b8fc
ED		 623 void *priv; /* pointer to private data */
624 int (*hard_start_xmit) (struct sk_buff *skb,
625 struct net_device *dev);
626 /* These may be needed for future network-power-down code. */
627 unsigned long trans_start; /* Time (in jiffies) of last Tx */
628
629 int watchdog_timeo; /* used by dev_watchdog() */
630 struct timer_list watchdog_timer;
631
632/*
633 * refcnt is a very hot point, so align it on SMP
634 */
1da177e4 635 /* Number of references to this device */
9356b8fc
ED		 636 atomic_t refcnt ____cacheline_aligned_in_smp;
637
1da177e4
LT		 638 /* delayed register/unregister */
639 struct list_head todo_list;
1da177e4
LT		 640 /* device index hash chain */
641 struct hlist_node index_hlist;
642
572a103d
HX		 643 struct net_device *link_watch_next;
644
1da177e4
LT		 645 /* register/unregister state machine */
646 enum { NETREG_UNINITIALIZED=0,
b17a7c17 647 NETREG_REGISTERED, /* completed register_netdevice */
1da177e4
LT		 648 NETREG_UNREGISTERING, /* called unregister_netdevice */
649 NETREG_UNREGISTERED, /* completed unregister todo */
650 NETREG_RELEASED, /* called free_netdev */
651 } reg_state;
652
1da177e4
LT		 653 /* Called after device is detached from network. */
654 void (*uninit)(struct net_device *dev);
655 /* Called after last user reference disappears. */
656 void (*destructor)(struct net_device *dev);
657
658 /* Pointers to interface service routines. */
659 int (*open)(struct net_device *dev);
660 int (*stop)(struct net_device *dev);
1da177e4 661#define HAVE_NETDEV_POLL
24023451
PM		 662#define HAVE_CHANGE_RX_FLAGS
663 void (*change_rx_flags)(struct net_device *dev,
664 int flags);
4417da66
PM		 665#define HAVE_SET_RX_MODE
666 void (*set_rx_mode)(struct net_device *dev);
1da177e4
LT		 667#define HAVE_MULTICAST
668 void (*set_multicast_list)(struct net_device *dev);
669#define HAVE_SET_MAC_ADDR
670 int (*set_mac_address)(struct net_device *dev,
671 void *addr);
672#define HAVE_PRIVATE_IOCTL
673 int (*do_ioctl)(struct net_device *dev,
674 struct ifreq *ifr, int cmd);
675#define HAVE_SET_CONFIG
676 int (*set_config)(struct net_device *dev,
677 struct ifmap *map);
1da177e4
LT		 678#define HAVE_CHANGE_MTU
679 int (*change_mtu)(struct net_device *dev, int new_mtu);
680
681#define HAVE_TX_TIMEOUT
682 void (*tx_timeout) (struct net_device *dev);
683
684 void (*vlan_rx_register)(struct net_device *dev,
685 struct vlan_group *grp);
686 void (*vlan_rx_add_vid)(struct net_device *dev,
687 unsigned short vid);
688 void (*vlan_rx_kill_vid)(struct net_device *dev,
689 unsigned short vid);
690
1da177e4
LT		 691 int (*neigh_setup)(struct net_device *dev, struct neigh_parms *);
692#ifdef CONFIG_NETPOLL
115c1d6e 693 struct netpoll_info *npinfo;
1da177e4
LT		 694#endif
695#ifdef CONFIG_NET_POLL_CONTROLLER
696 void (*poll_controller)(struct net_device *dev);
697#endif
698
4a1c5371
EB		 699 /* Network namespace this network device is inside */
700 struct net *nd_net;
701
1da177e4
LT		 702 /* bridge stuff */
703 struct net_bridge_port *br_port;
b863ceb7
PM		 704 /* macvlan */
705 struct macvlan_port *macvlan_port;
1da177e4 706
1da177e4 707 /* class/net/name entry */
43cb76d9 708 struct device dev;
fe9925b5
SH		 709 /* space for optional statistics and wireless sysfs groups */
710 struct attribute_group *sysfs_groups[3];
38f7b870
PM		 711
712 /* rtnetlink link ops */
713 const struct rtnl_link_ops *rtnl_link_ops;
f25f4e44
PWJ		 714
715 /* The TX queue control structures */
716 unsigned int egress_subqueue_count;
31ce72a6 717 struct net_device_subqueue egress_subqueue[1];
1da177e4 718};
43cb76d9 719#define to_net_dev(d) container_of(d, struct net_device, dev)
1da177e4
LT		 720
721#define NETDEV_ALIGN 32
722#define NETDEV_ALIGN_CONST (NETDEV_ALIGN - 1)
723
bea3348e
SH		 724/**
725 * netdev_priv - access network device private data
726 * @dev: network device
727 *
728 * Get network device private data
729 */
6472ce60 730static inline void *netdev_priv(const struct net_device *dev)
1da177e4 731{
f25f4e44 732 return dev->priv;
1da177e4
LT		 733}
734
1da177e4
LT		 735/* Set the sysfs physical device reference for the network logical device
736 * if set prior to registration will cause a symlink during initialization.
737 */
43cb76d9 738#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
1da177e4 739
bea3348e
SH		 740static inline void netif_napi_add(struct net_device *dev,
741 struct napi_struct *napi,
742 int (*poll)(struct napi_struct *, int),
743 int weight)
744{
745 INIT_LIST_HEAD(&napi->poll_list);
746 napi->poll = poll;
747 napi->weight = weight;
748#ifdef CONFIG_NETPOLL
749 napi->dev = dev;
750 list_add(&napi->dev_list, &dev->napi_list);
751 spin_lock_init(&napi->poll_lock);
752 napi->poll_owner = -1;
753#endif
754 set_bit(NAPI_STATE_SCHED, &napi->state);
755}
756
1da177e4 757struct packet_type {
f2ccd8fa
DM		 758 __be16 type; /* This is really htons(ether_type). */
759 struct net_device *dev; /* NULL is wildcarded here */
760 int (*func) (struct sk_buff *,
761 struct net_device *,
762 struct packet_type *,
763 struct net_device *);
576a30eb
HX		 764 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
765 int features);
a430a43d 766 int (*gso_send_check)(struct sk_buff *skb);
1da177e4
LT		 767 void *af_packet_priv;
768 struct list_head list;
769};
770
771#include <linux/interrupt.h>
772#include <linux/notifier.h>
773
1da177e4
LT		 774extern rwlock_t dev_base_lock; /* Device list lock */
775
7562f876 776
881d966b
EB		 777#define for_each_netdev(net, d) \
778 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
779#define for_each_netdev_safe(net, d, n) \
780 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
781#define for_each_netdev_continue(net, d) \
782 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
783#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
7562f876 784
a050c33f
DL		 785static inline struct net_device *next_net_device(struct net_device *dev)
786{
787 struct list_head *lh;
788 struct net *net;
789
790 net = dev->nd_net;
791 lh = dev->dev_list.next;
792 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
793}
794
795static inline struct net_device *first_net_device(struct net *net)
796{
797 return list_empty(&net->dev_base_head) ? NULL :
798 net_device_entry(net->dev_base_head.next);
799}
7562f876 800
1da177e4
LT		 801extern int netdev_boot_setup_check(struct net_device *dev);
802extern unsigned long netdev_boot_base(const char *prefix, int unit);
881d966b
EB		 803extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
804extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
805extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
1da177e4
LT		 806extern void dev_add_pack(struct packet_type *pt);
807extern void dev_remove_pack(struct packet_type *pt);
808extern void __dev_remove_pack(struct packet_type *pt);
809
881d966b 810extern struct net_device *dev_get_by_flags(struct net *net, unsigned short flags,
1da177e4 811 unsigned short mask);
881d966b
EB		 812extern struct net_device *dev_get_by_name(struct net *net, const char *name);
813extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
1da177e4
LT		 814extern int dev_alloc_name(struct net_device *dev, const char *name);
815extern int dev_open(struct net_device *dev);
816extern int dev_close(struct net_device *dev);
817extern int dev_queue_xmit(struct sk_buff *skb);
818extern int register_netdevice(struct net_device *dev);
22f8cde5 819extern void unregister_netdevice(struct net_device *dev);
1da177e4
LT		 820extern void free_netdev(struct net_device *dev);
821extern void synchronize_net(void);
822extern int register_netdevice_notifier(struct notifier_block *nb);
823extern int unregister_netdevice_notifier(struct notifier_block *nb);
ad7379d4 824extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
881d966b
EB		 825extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
826extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
1da177e4
LT		 827extern int dev_restart(struct net_device *dev);
828#ifdef CONFIG_NETPOLL_TRAP
829extern int netpoll_trap(void);
830#endif
831
0c4e8581
SH		 832static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
833 unsigned short type,
3b04ddde
SH		 834 const void *daddr, const void *saddr,
835 unsigned len)
0c4e8581 836{
3b04ddde 837 if (!dev->header_ops)
0c4e8581 838 return 0;
3b04ddde
SH		 839
840 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
0c4e8581
SH		 841}
842
b95cce35
SH		 843static inline int dev_parse_header(const struct sk_buff *skb,
844 unsigned char *haddr)
845{
846 const struct net_device *dev = skb->dev;
847
1b83336b 848 if (!dev->header_ops || !dev->header_ops->parse)
b95cce35 849 return 0;
3b04ddde 850 return dev->header_ops->parse(skb, haddr);
b95cce35
SH		 851}
852
1da177e4
LT		 853typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
854extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
855static inline int unregister_gifconf(unsigned int family)
856{
857 return register_gifconf(family, NULL);
858}
859
860/*
861 * Incoming packets are placed on per-cpu queues so that
862 * no locking is needed.
863 */
1da177e4
LT		 864struct softnet_data
865{
31aa02c5 866 struct net_device *output_queue;
1da177e4
LT		 867 struct sk_buff_head input_pkt_queue;
868 struct list_head poll_list;
1da177e4
LT		 869 struct sk_buff *completion_queue;
870
bea3348e 871 struct napi_struct backlog;
db217334
CL		 872#ifdef CONFIG_NET_DMA
873 struct dma_chan *net_dma;
874#endif
1da177e4
LT		 875};
876
877DECLARE_PER_CPU(struct softnet_data,softnet_data);
878
879#define HAVE_NETIF_QUEUE
880
56079431 881extern void __netif_schedule(struct net_device *dev);
1da177e4
LT		 882
883static inline void netif_schedule(struct net_device *dev)
884{
885 if (!test_bit(__LINK_STATE_XOFF, &dev->state))
886 __netif_schedule(dev);
887}
888
bea3348e
SH		 889/**
890 * netif_start_queue - allow transmit
891 * @dev: network device
892 *
893 * Allow upper layers to call the device hard_start_xmit routine.
894 */
1da177e4
LT		 895static inline void netif_start_queue(struct net_device *dev)
896{
897 clear_bit(__LINK_STATE_XOFF, &dev->state);
898}
899
bea3348e
SH		 900/**
901 * netif_wake_queue - restart transmit
902 * @dev: network device
903 *
904 * Allow upper layers to call the device hard_start_xmit routine.
905 * Used for flow control when transmit resources are available.
906 */
1da177e4
LT		 907static inline void netif_wake_queue(struct net_device *dev)
908{
909#ifdef CONFIG_NETPOLL_TRAP
5f286e11
SS		 910 if (netpoll_trap()) {
911 clear_bit(__LINK_STATE_XOFF, &dev->state);
1da177e4 912 return;
5f286e11 913 }
1da177e4
LT		 914#endif
915 if (test_and_clear_bit(__LINK_STATE_XOFF, &dev->state))
916 __netif_schedule(dev);
917}
918
bea3348e
SH		 919/**
920 * netif_stop_queue - stop transmitted packets
921 * @dev: network device
922 *
923 * Stop upper layers calling the device hard_start_xmit routine.
924 * Used for flow control when transmit resources are unavailable.
925 */
1da177e4
LT		 926static inline void netif_stop_queue(struct net_device *dev)
927{
1da177e4
LT		 928 set_bit(__LINK_STATE_XOFF, &dev->state);
929}
930
bea3348e
SH		 931/**
932 * netif_queue_stopped - test if transmit queue is flowblocked
933 * @dev: network device
934 *
935 * Test if transmit queue on device is currently unable to send.
936 */
1da177e4
LT		 937static inline int netif_queue_stopped(const struct net_device *dev)
938{
939 return test_bit(__LINK_STATE_XOFF, &dev->state);
940}
941
bea3348e
SH		 942/**
943 * netif_running - test if up
944 * @dev: network device
945 *
946 * Test if the device has been brought up.
947 */
1da177e4
LT		 948static inline int netif_running(const struct net_device *dev)
949{
950 return test_bit(__LINK_STATE_START, &dev->state);
951}
952
f25f4e44
PWJ		 953/*
954 * Routines to manage the subqueues on a device. We only need start
955 * stop, and a check if it's stopped. All other device management is
956 * done at the overall netdevice level.
957 * Also test the device if we're multiqueue.
958 */
bea3348e
SH		 959
960/**
961 * netif_start_subqueue - allow sending packets on subqueue
962 * @dev: network device
963 * @queue_index: sub queue index
964 *
965 * Start individual transmit queue of a device with multiple transmit queues.
966 */
f25f4e44
PWJ		 967static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
968{
969#ifdef CONFIG_NETDEVICES_MULTIQUEUE
970 clear_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
971#endif
972}
973
bea3348e
SH		 974/**
975 * netif_stop_subqueue - stop sending packets on subqueue
976 * @dev: network device
977 * @queue_index: sub queue index
978 *
979 * Stop individual transmit queue of a device with multiple transmit queues.
980 */
f25f4e44
PWJ		 981static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
982{
983#ifdef CONFIG_NETDEVICES_MULTIQUEUE
984#ifdef CONFIG_NETPOLL_TRAP
985 if (netpoll_trap())
986 return;
987#endif
988 set_bit(__LINK_STATE_XOFF, &dev->egress_subqueue[queue_index].state);
989#endif
990}
991
bea3348e
SH		 992/**
993 * netif_subqueue_stopped - test status of subqueue
994 * @dev: network device
995 * @queue_index: sub queue index
996 *
997 * Check individual transmit queue of a device with multiple transmit queues.
998 */
f25f4e44
PWJ		 999static inline int netif_subqueue_stopped(const struct net_device *dev,
1000 u16 queue_index)
1001{
1002#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1003 return test_bit(__LINK_STATE_XOFF,
1004 &dev->egress_subqueue[queue_index].state);
1005#else
1006 return 0;
1007#endif
1008}
1009
bea3348e
SH		 1010
1011/**
1012 * netif_wake_subqueue - allow sending packets on subqueue
1013 * @dev: network device
1014 * @queue_index: sub queue index
1015 *
1016 * Resume individual transmit queue of a device with multiple transmit queues.
1017 */
f25f4e44
PWJ		 1018static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1019{
1020#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1021#ifdef CONFIG_NETPOLL_TRAP
1022 if (netpoll_trap())
1023 return;
1024#endif
1025 if (test_and_clear_bit(__LINK_STATE_XOFF,
1026 &dev->egress_subqueue[queue_index].state))
1027 __netif_schedule(dev);
1028#endif
1029}
1030
bea3348e
SH		 1031/**
1032 * netif_is_multiqueue - test if device has multiple transmit queues
1033 * @dev: network device
1034 *
1035 * Check if device has multiple transmit queues
1036 * Always falls if NETDEVICE_MULTIQUEUE is not configured
1037 */
f25f4e44
PWJ		 1038static inline int netif_is_multiqueue(const struct net_device *dev)
1039{
1040#ifdef CONFIG_NETDEVICES_MULTIQUEUE
1041 return (!!(NETIF_F_MULTI_QUEUE & dev->features));
1042#else
1043 return 0;
1044#endif
1045}
1da177e4
LT		 1046
1047/* Use this variant when it is known for sure that it
1048 * is executing from interrupt context.
1049 */
bea3348e 1050extern void dev_kfree_skb_irq(struct sk_buff *skb);
1da177e4
LT		 1051
1052/* Use this variant in places where it could be invoked
1053 * either from interrupt or non-interrupt context.
1054 */
56079431 1055extern void dev_kfree_skb_any(struct sk_buff *skb);
1da177e4
LT		 1056
1057#define HAVE_NETIF_RX 1
1058extern int netif_rx(struct sk_buff *skb);
1059extern int netif_rx_ni(struct sk_buff *skb);
1060#define HAVE_NETIF_RECEIVE_SKB 1
1061extern int netif_receive_skb(struct sk_buff *skb);
c2373ee9 1062extern int dev_valid_name(const char *name);
881d966b
EB		 1063extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1064extern int dev_ethtool(struct net *net, struct ifreq *);
1da177e4
LT		 1065extern unsigned dev_get_flags(const struct net_device *);
1066extern int dev_change_flags(struct net_device *, unsigned);
1067extern int dev_change_name(struct net_device *, char *);
ce286d32
EB		 1068extern int dev_change_net_namespace(struct net_device *,
1069 struct net *, const char *);
1da177e4
LT		 1070extern int dev_set_mtu(struct net_device *, int);
1071extern int dev_set_mac_address(struct net_device *,
1072 struct sockaddr *);
f6a78bfc
HX		 1073extern int dev_hard_start_xmit(struct sk_buff *skb,
1074 struct net_device *dev);
1da177e4 1075
20380731 1076extern int netdev_budget;
1da177e4
LT		 1077
1078/* Called by rtnetlink.c:rtnl_unlock() */
1079extern void netdev_run_todo(void);
1080
bea3348e
SH		 1081/**
1082 * dev_put - release reference to device
1083 * @dev: network device
1084 *
9ef4429b 1085 * Release reference to device to allow it to be freed.
bea3348e 1086 */
1da177e4
LT		 1087static inline void dev_put(struct net_device *dev)
1088{
1089 atomic_dec(&dev->refcnt);
1090}
1091
bea3348e
SH		 1092/**
1093 * dev_hold - get reference to device
1094 * @dev: network device
1095 *
9ef4429b 1096 * Hold reference to device to keep it from being freed.
bea3348e 1097 */
15333061
SH		 1098static inline void dev_hold(struct net_device *dev)
1099{
1100 atomic_inc(&dev->refcnt);
1101}
1da177e4
LT		 1102
1103/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1104 * and _off may be called from IRQ context, but it is caller
1105 * who is responsible for serialization of these calls.
b00055aa
SR		 1106 *
1107 * The name carrier is inappropriate, these functions should really be
1108 * called netif_lowerlayer_*() because they represent the state of any
1109 * kind of lower layer not just hardware media.
1da177e4
LT		 1110 */
1111
1112extern void linkwatch_fire_event(struct net_device *dev);
1113
bea3348e
SH		 1114/**
1115 * netif_carrier_ok - test if carrier present
1116 * @dev: network device
1117 *
1118 * Check if carrier is present on device
1119 */
1da177e4
LT		 1120static inline int netif_carrier_ok(const struct net_device *dev)
1121{
1122 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1123}
1124
1125extern void __netdev_watchdog_up(struct net_device *dev);
1126
0a242efc 1127extern void netif_carrier_on(struct net_device *dev);
1da177e4 1128
0a242efc 1129extern void netif_carrier_off(struct net_device *dev);
1da177e4 1130
bea3348e
SH		 1131/**
1132 * netif_dormant_on - mark device as dormant.
1133 * @dev: network device
1134 *
1135 * Mark device as dormant (as per RFC2863).
1136 *
1137 * The dormant state indicates that the relevant interface is not
1138 * actually in a condition to pass packets (i.e., it is not 'up') but is
1139 * in a "pending" state, waiting for some external event. For "on-
1140 * demand" interfaces, this new state identifies the situation where the
1141 * interface is waiting for events to place it in the up state.
1142 *
1143 */
b00055aa
SR		 1144static inline void netif_dormant_on(struct net_device *dev)
1145{
1146 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1147 linkwatch_fire_event(dev);
1148}
1149
bea3348e
SH		 1150/**
1151 * netif_dormant_off - set device as not dormant.
1152 * @dev: network device
1153 *
1154 * Device is not in dormant state.
1155 */
b00055aa
SR		 1156static inline void netif_dormant_off(struct net_device *dev)
1157{
1158 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1159 linkwatch_fire_event(dev);
1160}
1161
bea3348e
SH		 1162/**
1163 * netif_dormant - test if carrier present
1164 * @dev: network device
1165 *
1166 * Check if carrier is present on device
1167 */
b00055aa
SR		 1168static inline int netif_dormant(const struct net_device *dev)
1169{
1170 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1171}
1172
1173
bea3348e
SH		 1174/**
1175 * netif_oper_up - test if device is operational
1176 * @dev: network device
1177 *
1178 * Check if carrier is operational
1179 */
b00055aa
SR		 1180static inline int netif_oper_up(const struct net_device *dev) {
1181 return (dev->operstate == IF_OPER_UP ||
1182 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1183}
1184
bea3348e
SH		 1185/**
1186 * netif_device_present - is device available or removed
1187 * @dev: network device
1188 *
1189 * Check if device has not been removed from system.
1190 */
1da177e4
LT		 1191static inline int netif_device_present(struct net_device *dev)
1192{
1193 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1194}
1195
56079431 1196extern void netif_device_detach(struct net_device *dev);
1da177e4 1197
56079431 1198extern void netif_device_attach(struct net_device *dev);
1da177e4
LT		 1199
1200/*
1201 * Network interface message level settings
1202 */
1203#define HAVE_NETIF_MSG 1
1204
1205enum {
1206 NETIF_MSG_DRV = 0x0001,
1207 NETIF_MSG_PROBE = 0x0002,
1208 NETIF_MSG_LINK = 0x0004,
1209 NETIF_MSG_TIMER = 0x0008,
1210 NETIF_MSG_IFDOWN = 0x0010,
1211 NETIF_MSG_IFUP = 0x0020,
1212 NETIF_MSG_RX_ERR = 0x0040,
1213 NETIF_MSG_TX_ERR = 0x0080,
1214 NETIF_MSG_TX_QUEUED = 0x0100,
1215 NETIF_MSG_INTR = 0x0200,
1216 NETIF_MSG_TX_DONE = 0x0400,
1217 NETIF_MSG_RX_STATUS = 0x0800,
1218 NETIF_MSG_PKTDATA = 0x1000,
1219 NETIF_MSG_HW = 0x2000,
1220 NETIF_MSG_WOL = 0x4000,
1221};
1222
1223#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1224#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1225#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1226#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1227#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1228#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1229#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1230#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1231#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1232#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1233#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1234#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1235#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1236#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1237#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1238
1239static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1240{
1241 /* use default */
1242 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1243 return default_msg_enable_bits;
1244 if (debug_value == 0) /* no output */
1245 return 0;
1246 /* set low N bits */
1247 return (1 << debug_value) - 1;
1248}
1249
0a122576 1250/* Test if receive needs to be scheduled but only if up */
bea3348e
SH		 1251static inline int netif_rx_schedule_prep(struct net_device *dev,
1252 struct napi_struct *napi)
1da177e4 1253{
bea3348e 1254 return netif_running(dev) && napi_schedule_prep(napi);
1da177e4
LT		 1255}
1256
1257/* Add interface to tail of rx poll list. This assumes that _prep has
1258 * already been called and returned 1.
1259 */
bea3348e
SH		 1260static inline void __netif_rx_schedule(struct net_device *dev,
1261 struct napi_struct *napi)
1262{
1263 dev_hold(dev);
1264 __napi_schedule(napi);
1265}
1da177e4
LT		 1266
1267/* Try to reschedule poll. Called by irq handler. */
1268
bea3348e
SH		 1269static inline void netif_rx_schedule(struct net_device *dev,
1270 struct napi_struct *napi)
1da177e4 1271{
bea3348e
SH		 1272 if (netif_rx_schedule_prep(dev, napi))
1273 __netif_rx_schedule(dev, napi);
1da177e4
LT		 1274}
1275
bea3348e
SH		 1276/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
1277static inline int netif_rx_reschedule(struct net_device *dev,
1278 struct napi_struct *napi)
1da177e4 1279{
bea3348e
SH		 1280 if (napi_schedule_prep(napi)) {
1281 __netif_rx_schedule(dev, napi);
1da177e4
LT		 1282 return 1;
1283 }
1284 return 0;
1285}
1286
b0ba6667
HX		 1287/* same as netif_rx_complete, except that local_irq_save(flags)
1288 * has already been issued
1289 */
bea3348e
SH		 1290static inline void __netif_rx_complete(struct net_device *dev,
1291 struct napi_struct *napi)
b0ba6667 1292{
bea3348e
SH		 1293 __napi_complete(napi);
1294 dev_put(dev);
b0ba6667
HX		 1295}
1296
1da177e4
LT		 1297/* Remove interface from poll list: it must be in the poll list
1298 * on current cpu. This primitive is called by dev->poll(), when
1299 * it completes the work. The device cannot be out of poll list at this
1300 * moment, it is BUG().
1301 */
bea3348e
SH		 1302static inline void netif_rx_complete(struct net_device *dev,
1303 struct napi_struct *napi)
1da177e4
LT		 1304{
1305 unsigned long flags;
1306
1307 local_irq_save(flags);
bea3348e 1308 __netif_rx_complete(dev, napi);
1da177e4
LT		 1309 local_irq_restore(flags);
1310}
1311
bea3348e
SH		 1312/**
1313 * netif_tx_lock - grab network device transmit lock
1314 * @dev: network device
c4ea43c5 1315 * @cpu: cpu number of lock owner
bea3348e
SH		 1316 *
1317 * Get network device transmit lock
1318 */
22dd7495 1319static inline void __netif_tx_lock(struct net_device *dev, int cpu)
932ff279
HX		 1320{
1321 spin_lock(&dev->_xmit_lock);
22dd7495
JHS		 1322 dev->xmit_lock_owner = cpu;
1323}
1324
1325static inline void netif_tx_lock(struct net_device *dev)
1326{
1327 __netif_tx_lock(dev, smp_processor_id());
932ff279
HX		 1328}
1329
1330static inline void netif_tx_lock_bh(struct net_device *dev)
1331{
1332 spin_lock_bh(&dev->_xmit_lock);
1333 dev->xmit_lock_owner = smp_processor_id();
1334}
1335
1336static inline int netif_tx_trylock(struct net_device *dev)
1337{
53c4b2cc
HX		 1338 int ok = spin_trylock(&dev->_xmit_lock);
1339 if (likely(ok))
932ff279 1340 dev->xmit_lock_owner = smp_processor_id();
53c4b2cc 1341 return ok;
932ff279
HX		 1342}
1343
1344static inline void netif_tx_unlock(struct net_device *dev)
1345{
1346 dev->xmit_lock_owner = -1;
1347 spin_unlock(&dev->_xmit_lock);
1348}
1349
1350static inline void netif_tx_unlock_bh(struct net_device *dev)
1351{
1352 dev->xmit_lock_owner = -1;
1353 spin_unlock_bh(&dev->_xmit_lock);
1354}
1355
22dd7495
JHS		 1356#define HARD_TX_LOCK(dev, cpu) { \
1357 if ((dev->features & NETIF_F_LLTX) == 0) { \
1358 __netif_tx_lock(dev, cpu); \
1359 } \
1360}
1361
1362#define HARD_TX_UNLOCK(dev) { \
1363 if ((dev->features & NETIF_F_LLTX) == 0) { \
1364 netif_tx_unlock(dev); \
1365 } \
1366}
1367
1da177e4
LT		 1368static inline void netif_tx_disable(struct net_device *dev)
1369{
932ff279 1370 netif_tx_lock_bh(dev);
1da177e4 1371 netif_stop_queue(dev);
932ff279 1372 netif_tx_unlock_bh(dev);
1da177e4
LT		 1373}
1374
1375/* These functions live elsewhere (drivers/net/net_init.c, but related) */
1376
1377extern void ether_setup(struct net_device *dev);
1378
1379/* Support for loadable net-drivers */
f25f4e44
PWJ		 1380extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
1381 void (*setup)(struct net_device *),
1382 unsigned int queue_count);
1383#define alloc_netdev(sizeof_priv, name, setup) \
1384 alloc_netdev_mq(sizeof_priv, name, setup, 1)
1da177e4
LT		 1385extern int register_netdev(struct net_device *dev);
1386extern void unregister_netdev(struct net_device *dev);
4417da66
PM		 1387/* Functions used for secondary unicast and multicast support */
1388extern void dev_set_rx_mode(struct net_device *dev);
1389extern void __dev_set_rx_mode(struct net_device *dev);
1390extern int dev_unicast_delete(struct net_device *dev, void *addr, int alen);
1391extern int dev_unicast_add(struct net_device *dev, void *addr, int alen);
1da177e4
LT		 1392extern int dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
1393extern int dev_mc_add(struct net_device *dev, void *addr, int alen, int newonly);
a0a400d7
PM		 1394extern int dev_mc_sync(struct net_device *to, struct net_device *from);
1395extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
61cbc2fc
PM		 1396extern int __dev_addr_delete(struct dev_addr_list **list, int *count, void *addr, int alen, int all);
1397extern int __dev_addr_add(struct dev_addr_list **list, int *count, void *addr, int alen, int newonly);
1da177e4
LT		 1398extern void dev_set_promiscuity(struct net_device *dev, int inc);
1399extern void dev_set_allmulti(struct net_device *dev, int inc);
1400extern void netdev_state_change(struct net_device *dev);
d8a33ac4 1401extern void netdev_features_change(struct net_device *dev);
1da177e4 1402/* Load a device via the kmod */
881d966b 1403extern void dev_load(struct net *net, const char *name);
1da177e4
LT		 1404extern void dev_mcast_init(void);
1405extern int netdev_max_backlog;
1406extern int weight_p;
1407extern int netdev_set_master(struct net_device *dev, struct net_device *master);
84fa7933 1408extern int skb_checksum_help(struct sk_buff *skb);
576a30eb 1409extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
fb286bb2
HX		 1410#ifdef CONFIG_BUG
1411extern void netdev_rx_csum_fault(struct net_device *dev);
1412#else
1413static inline void netdev_rx_csum_fault(struct net_device *dev)
1414{
1415}
1416#endif
1da177e4
LT		 1417/* rx skb timestamps */
1418extern void net_enable_timestamp(void);
1419extern void net_disable_timestamp(void);
1420
20380731
ACM		 1421#ifdef CONFIG_PROC_FS
1422extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
1423extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
1424extern void dev_seq_stop(struct seq_file *seq, void *v);
1425#endif
1426
1427extern void linkwatch_run_queue(void);
1428
7f353bf2
HX		 1429extern int netdev_compute_features(unsigned long all, unsigned long one);
1430
bcd76111 1431static inline int net_gso_ok(int features, int gso_type)
576a30eb 1432{
bcd76111 1433 int feature = gso_type << NETIF_F_GSO_SHIFT;
d6b4991a 1434 return (features & feature) == feature;
576a30eb
HX		 1435}
1436
bcd76111
HX		 1437static inline int skb_gso_ok(struct sk_buff *skb, int features)
1438{
a430a43d 1439 return net_gso_ok(features, skb_shinfo(skb)->gso_type);
bcd76111
HX		 1440}
1441
7967168c
HX		 1442static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
1443{
a430a43d
HX		 1444 return skb_is_gso(skb) &&
1445 (!skb_gso_ok(skb, dev->features) ||
84fa7933 1446 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
7967168c
HX		 1447}
1448
7ea49ed7 1449/* On bonding slaves other than the currently active slave, suppress
f5b2b966
JV		 1450 * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
1451 * ARP on active-backup slaves with arp_validate enabled.
7ea49ed7
DM		 1452 */
1453static inline int skb_bond_should_drop(struct sk_buff *skb)
1454{
1455 struct net_device *dev = skb->dev;
1456 struct net_device *master = dev->master;
1457
1458 if (master &&
1459 (dev->priv_flags & IFF_SLAVE_INACTIVE)) {
f5b2b966
JV		 1460 if ((dev->priv_flags & IFF_SLAVE_NEEDARP) &&
1461 skb->protocol == __constant_htons(ETH_P_ARP))
1462 return 0;
1463
7ea49ed7
DM		 1464 if (master->priv_flags & IFF_MASTER_ALB) {
1465 if (skb->pkt_type != PACKET_BROADCAST &&
1466 skb->pkt_type != PACKET_MULTICAST)
1467 return 0;
1468 }
1469 if (master->priv_flags & IFF_MASTER_8023AD &&
1470 skb->protocol == __constant_htons(ETH_P_SLOW))
1471 return 0;
1472
1473 return 1;
1474 }
1475 return 0;
1476}
1477
1da177e4
LT		 1478#endif /* __KERNEL__ */
1479
1480#endif /* _LINUX_DEV_H */
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