blob: 17e95e37aed902de1fd81dc5ae9c524468406d25 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Jesper Juhl02c30a82005-05-05 16:16:16 -070010 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * 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>
Alan Cox113aa832008-10-13 19:01:08 -070014 * Alan Cox, <alan@lxorguk.ukuu.org.uk>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 * 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>
Williams, Mitch A95c26df2010-02-10 01:43:46 +000031#include <linux/if_link.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33#ifdef __KERNEL__
Mark Grossed771342010-05-06 01:59:26 +020034#include <linux/pm_qos_params.h>
Al Virod7fe0f22006-12-03 23:15:30 -050035#include <linux/timer.h>
Stephen Hemmingerbea33482007-10-03 16:41:36 -070036#include <linux/delay.h>
Dmitri Vorobievcc0be322009-03-27 15:55:36 -070037#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <asm/atomic.h>
39#include <asm/cache.h>
40#include <asm/byteorder.h>
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/device.h>
43#include <linux/percpu.h>
David S. Miller4d5b78c2009-05-06 16:52:51 -070044#include <linux/rculist.h>
Chris Leechdb217332006-06-17 21:24:58 -070045#include <linux/dmaengine.h>
Stephen Hemmingerbea33482007-10-03 16:41:36 -070046#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Patrick McHardyb1b67dd2009-04-20 04:49:28 +000048#include <linux/ethtool.h>
Daniel Lezcanoa050c332007-09-12 14:57:09 +020049#include <net/net_namespace.h>
Lennert Buytenhekcf85d082008-10-07 13:45:02 +000050#include <net/dsa.h>
Jeff Kirsher7a6b6f52008-11-25 01:02:08 -080051#ifdef CONFIG_DCB
Alexander Duyck2f90b862008-11-20 20:52:10 -080052#include <net/dcbnl.h>
53#endif
Daniel Lezcanoa050c332007-09-12 14:57:09 +020054
Linus Torvalds1da177e2005-04-16 15:20:36 -070055struct vlan_group;
Jeff Moyer115c1d62005-06-22 22:05:31 -070056struct netpoll_info;
Johannes Berg704232c2007-04-23 12:20:05 -070057/* 802.11 specific */
58struct wireless_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 /* source back-compat hooks */
60#define SET_ETHTOOL_OPS(netdev,ops) \
61 ( (netdev)->ethtool_ops = (ops) )
62
63#define HAVE_ALLOC_NETDEV /* feature macro: alloc_xxxdev
64 functions are available. */
65#define HAVE_FREE_NETDEV /* free_netdev() */
66#define HAVE_NETDEV_PRIV /* netdev_priv() */
67
Jarek Poplawski9a1654b2009-11-15 07:20:12 +000068/* Backlog congestion levels */
69#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
70#define NET_RX_DROP 1 /* packet dropped */
71
Patrick McHardy572a9d72009-11-10 06:14:14 +000072/*
73 * Transmit return codes: transmit return codes originate from three different
74 * namespaces:
75 *
76 * - qdisc return codes
77 * - driver transmit return codes
78 * - errno values
79 *
80 * Drivers are allowed to return any one of those in their hard_start_xmit()
81 * function. Real network devices commonly used with qdiscs should only return
82 * the driver transmit return codes though - when qdiscs are used, the actual
83 * transmission happens asynchronously, so the value is not propagated to
84 * higher layers. Virtual network devices transmit synchronously, in this case
85 * the driver transmit return codes are consumed by dev_queue_xmit(), all
86 * others are propagated to higher layers.
87 */
88
89/* qdisc ->enqueue() return codes. */
90#define NET_XMIT_SUCCESS 0x00
Jarek Poplawski9a1654b2009-11-15 07:20:12 +000091#define NET_XMIT_DROP 0x01 /* skb dropped */
92#define NET_XMIT_CN 0x02 /* congestion notification */
93#define NET_XMIT_POLICED 0x03 /* skb is shot by police */
94#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
Gerrit Renkerb9df3cb2006-11-14 11:21:36 -020096/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
97 * indicates that the device will soon be dropping packets, or already drops
98 * some packets of the same priority; prompting us to send less aggressively. */
Patrick McHardy572a9d72009-11-10 06:14:14 +000099#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
101
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000102/* Driver transmit return codes */
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000103#define NETDEV_TX_MASK 0xf0
Patrick McHardy572a9d72009-11-10 06:14:14 +0000104
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000105enum netdev_tx {
Patrick McHardy572a9d72009-11-10 06:14:14 +0000106 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000107 NETDEV_TX_OK = 0x00, /* driver took care of packet */
108 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
109 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000110};
111typedef enum netdev_tx netdev_tx_t;
112
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000113/*
114 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
115 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
116 */
117static inline bool dev_xmit_complete(int rc)
118{
119 /*
120 * Positive cases with an skb consumed by a driver:
121 * - successful transmission (rc == NETDEV_TX_OK)
122 * - error while transmitting (rc < 0)
123 * - error while queueing to a different device (rc & NET_XMIT_MASK)
124 */
125 if (likely(rc < NET_XMIT_MASK))
126 return true;
127
128 return false;
129}
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131#endif
132
133#define MAX_ADDR_LEN 32 /* Largest hardware address length */
134
Adrian Bunkc88e6f52008-06-27 19:54:54 -0700135#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136/*
137 * Compute the worst case header length according to the protocols
138 * used.
139 */
Graf Yangfe2918b2009-02-05 21:26:19 -0800140
John W. Linvillecaf66e52010-02-25 12:02:45 -0500141#if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
David S. Miller8388e3d2008-05-12 20:17:33 -0700142# if defined(CONFIG_MAC80211_MESH)
143# define LL_MAX_HEADER 128
144# else
145# define LL_MAX_HEADER 96
146# endif
Adrian Bunkc759a6b2009-04-27 02:36:20 -0700147#elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
David S. Miller8388e3d2008-05-12 20:17:33 -0700148# define LL_MAX_HEADER 48
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#else
David S. Miller8388e3d2008-05-12 20:17:33 -0700150# define LL_MAX_HEADER 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151#endif
152
David S. Millere81c73592006-11-28 20:53:39 -0800153#if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \
154 !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \
155 !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \
156 !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#define MAX_HEADER LL_MAX_HEADER
158#else
159#define MAX_HEADER (LL_MAX_HEADER + 48)
160#endif
161
162/*
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000163 * Old network device statistics. Fields are native words
164 * (unsigned long) so they can be read and written atomically.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 */
Graf Yangfe2918b2009-02-05 21:26:19 -0800166
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800167struct net_device_stats {
Ben Hutchings3cfde792010-07-09 09:11:52 +0000168 unsigned long rx_packets;
169 unsigned long tx_packets;
170 unsigned long rx_bytes;
171 unsigned long tx_bytes;
172 unsigned long rx_errors;
173 unsigned long tx_errors;
174 unsigned long rx_dropped;
175 unsigned long tx_dropped;
176 unsigned long multicast;
177 unsigned long collisions;
178 unsigned long rx_length_errors;
179 unsigned long rx_over_errors;
180 unsigned long rx_crc_errors;
181 unsigned long rx_frame_errors;
182 unsigned long rx_fifo_errors;
183 unsigned long rx_missed_errors;
184 unsigned long tx_aborted_errors;
185 unsigned long tx_carrier_errors;
186 unsigned long tx_fifo_errors;
187 unsigned long tx_heartbeat_errors;
188 unsigned long tx_window_errors;
189 unsigned long rx_compressed;
190 unsigned long tx_compressed;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191};
192
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000193#endif /* __KERNEL__ */
194
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196/* Media selection options. */
197enum {
198 IF_PORT_UNKNOWN = 0,
199 IF_PORT_10BASE2,
200 IF_PORT_10BASET,
201 IF_PORT_AUI,
202 IF_PORT_100BASET,
203 IF_PORT_100BASETX,
204 IF_PORT_100BASEFX
205};
206
207#ifdef __KERNEL__
208
209#include <linux/cache.h>
210#include <linux/skbuff.h>
211
212struct neighbour;
213struct neigh_parms;
214struct sk_buff;
215
Jiri Pirkof001fde2009-05-05 02:48:28 +0000216struct netdev_hw_addr {
217 struct list_head list;
218 unsigned char addr[MAX_ADDR_LEN];
219 unsigned char type;
Jiri Pirkoccffad252009-05-22 23:22:17 +0000220#define NETDEV_HW_ADDR_T_LAN 1
221#define NETDEV_HW_ADDR_T_SAN 2
222#define NETDEV_HW_ADDR_T_SLAVE 3
223#define NETDEV_HW_ADDR_T_UNICAST 4
Jiri Pirko22bedad2010-04-01 21:22:57 +0000224#define NETDEV_HW_ADDR_T_MULTICAST 5
Jiri Pirkoccffad252009-05-22 23:22:17 +0000225 int refcount;
226 bool synced;
Jiri Pirko22bedad2010-04-01 21:22:57 +0000227 bool global_use;
Jiri Pirkof001fde2009-05-05 02:48:28 +0000228 struct rcu_head rcu_head;
229};
230
Jiri Pirko31278e72009-06-17 01:12:19 +0000231struct netdev_hw_addr_list {
232 struct list_head list;
233 int count;
234};
235
Jiri Pirko22bedad2010-04-01 21:22:57 +0000236#define netdev_hw_addr_list_count(l) ((l)->count)
237#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
238#define netdev_hw_addr_list_for_each(ha, l) \
239 list_for_each_entry(ha, &(l)->list, list)
240
241#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
242#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
Jiri Pirko32e7bfc2010-01-25 13:36:10 -0800243#define netdev_for_each_uc_addr(ha, dev) \
Jiri Pirko22bedad2010-04-01 21:22:57 +0000244 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
Jiri Pirko32e7bfc2010-01-25 13:36:10 -0800245
Jiri Pirko22bedad2010-04-01 21:22:57 +0000246#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
247#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
Pavel Roskin18e225f2010-04-07 16:40:09 -0700248#define netdev_for_each_mc_addr(ha, dev) \
Jiri Pirko22bedad2010-04-01 21:22:57 +0000249 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
Jiri Pirko6683ece2010-02-04 10:22:25 -0800250
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800251struct hh_cache {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 struct hh_cache *hh_next; /* Next entry */
253 atomic_t hh_refcnt; /* number of users */
Eric Dumazetf0490982006-12-08 00:08:43 -0800254/*
255 * We want hh_output, hh_len, hh_lock and hh_data be a in a separate
256 * cache line on SMP.
257 * They are mostly read, but hh_refcnt may be changed quite frequently,
258 * incurring cache line ping pongs.
259 */
260 __be16 hh_type ____cacheline_aligned_in_smp;
261 /* protocol identifier, f.e ETH_P_IP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 * NOTE: For VLANs, this will be the
263 * encapuslated type. --BLG
264 */
Arnaldo Carvalho de Melod5c42c02006-11-27 17:58:02 -0200265 u16 hh_len; /* length of header */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 int (*hh_output)(struct sk_buff *skb);
Stephen Hemminger3644f0c2006-12-07 15:08:17 -0800267 seqlock_t hh_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 /* cached hardware header; allow for machine alignment needs. */
270#define HH_DATA_MOD 16
271#define HH_DATA_OFF(__len) \
Jiri Benc5ba0eac2005-06-02 16:48:05 -0700272 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273#define HH_DATA_ALIGN(__len) \
274 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
275 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
276};
277
278/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
279 * Alternative is:
280 * dev->hard_header_len ? (dev->hard_header_len +
281 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
282 *
283 * We could use other alignment values, but we must maintain the
284 * relationship HH alignment <= LL alignment.
Johannes Bergf5184d22008-05-12 20:48:31 -0700285 *
286 * LL_ALLOCATED_SPACE also takes into account the tailroom the device
287 * may need.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 */
289#define LL_RESERVED_SPACE(dev) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700290 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700292 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
293#define LL_ALLOCATED_SPACE(dev) \
294 ((((dev)->hard_header_len+(dev)->needed_headroom+(dev)->needed_tailroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700296struct header_ops {
297 int (*create) (struct sk_buff *skb, struct net_device *dev,
298 unsigned short type, const void *daddr,
299 const void *saddr, unsigned len);
300 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
301 int (*rebuild)(struct sk_buff *skb);
302#define HAVE_HEADER_CACHE
303 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh);
304 void (*cache_update)(struct hh_cache *hh,
305 const struct net_device *dev,
306 const unsigned char *haddr);
307};
308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309/* These flag bits are private to the generic network queueing
310 * layer, they may not be explicitly referenced by any other
311 * code.
312 */
313
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800314enum netdev_state_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 __LINK_STATE_START,
316 __LINK_STATE_PRESENT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 __LINK_STATE_NOCARRIER,
Stefan Rompfb00055a2006-03-20 17:09:11 -0800318 __LINK_STATE_LINKWATCH_PENDING,
319 __LINK_STATE_DORMANT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320};
321
322
323/*
324 * This structure holds at boot time configured netdevice settings. They
Graf Yangfe2918b2009-02-05 21:26:19 -0800325 * are then used in the device probing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 */
327struct netdev_boot_setup {
328 char name[IFNAMSIZ];
329 struct ifmap map;
330};
331#define NETDEV_BOOT_SETUP_MAX 8
332
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300333extern int __init netdev_boot_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335/*
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700336 * Structure for NAPI scheduling similar to tasklet but with weighting
337 */
338struct napi_struct {
339 /* The poll_list must only be managed by the entity which
340 * changes the state of the NAPI_STATE_SCHED bit. This means
341 * whoever atomically sets that bit can add this napi_struct
342 * to the per-cpu poll_list, and whoever clears that bit
343 * can remove from the list right before clearing the bit.
344 */
345 struct list_head poll_list;
346
347 unsigned long state;
348 int weight;
349 int (*poll)(struct napi_struct *, int);
350#ifdef CONFIG_NETPOLL
351 spinlock_t poll_lock;
352 int poll_owner;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700353#endif
Herbert Xu4ae55442009-02-08 18:00:36 +0000354
355 unsigned int gro_count;
356
Herbert Xu5d38a072009-01-04 16:13:40 -0800357 struct net_device *dev;
Herbert Xud565b0a2008-12-15 23:38:52 -0800358 struct list_head dev_list;
359 struct sk_buff *gro_list;
Herbert Xu5d38a072009-01-04 16:13:40 -0800360 struct sk_buff *skb;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700361};
362
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800363enum {
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700364 NAPI_STATE_SCHED, /* Poll is scheduled */
David S. Millera0a46192008-01-07 20:35:07 -0800365 NAPI_STATE_DISABLE, /* Disable pending */
Neil Horman7b363e42008-12-09 23:22:26 -0800366 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700367};
368
Ben Hutchings5b252f02009-10-29 07:17:09 +0000369enum gro_result {
Herbert Xud1c76af2009-03-16 10:50:02 -0700370 GRO_MERGED,
371 GRO_MERGED_FREE,
372 GRO_HELD,
373 GRO_NORMAL,
374 GRO_DROP,
375};
Ben Hutchings5b252f02009-10-29 07:17:09 +0000376typedef enum gro_result gro_result_t;
Herbert Xud1c76af2009-03-16 10:50:02 -0700377
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000378typedef struct sk_buff *rx_handler_func_t(struct sk_buff *skb);
379
Harvey Harrisonb3c97522008-02-13 15:03:15 -0800380extern void __napi_schedule(struct napi_struct *n);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700381
David S. Millera0a46192008-01-07 20:35:07 -0800382static inline int napi_disable_pending(struct napi_struct *n)
383{
384 return test_bit(NAPI_STATE_DISABLE, &n->state);
385}
386
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700387/**
388 * napi_schedule_prep - check if napi can be scheduled
389 * @n: napi context
390 *
391 * Test if NAPI routine is already running, and if not mark
392 * it as running. This is used as a condition variable
David S. Millera0a46192008-01-07 20:35:07 -0800393 * insure only one NAPI poll instance runs. We also make
394 * sure there is no pending NAPI disable.
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700395 */
396static inline int napi_schedule_prep(struct napi_struct *n)
397{
David S. Millera0a46192008-01-07 20:35:07 -0800398 return !napi_disable_pending(n) &&
399 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700400}
401
402/**
403 * napi_schedule - schedule NAPI poll
404 * @n: napi context
405 *
406 * Schedule NAPI poll routine to be called if it is not already
407 * running.
408 */
409static inline void napi_schedule(struct napi_struct *n)
410{
411 if (napi_schedule_prep(n))
412 __napi_schedule(n);
413}
414
Roland Dreierbfe13f52007-10-09 15:47:37 -0700415/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
416static inline int napi_reschedule(struct napi_struct *napi)
417{
418 if (napi_schedule_prep(napi)) {
419 __napi_schedule(napi);
420 return 1;
421 }
422 return 0;
423}
424
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700425/**
426 * napi_complete - NAPI processing complete
427 * @n: napi context
428 *
429 * Mark NAPI processing as complete.
430 */
Herbert Xud565b0a2008-12-15 23:38:52 -0800431extern void __napi_complete(struct napi_struct *n);
432extern void napi_complete(struct napi_struct *n);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700433
434/**
435 * napi_disable - prevent NAPI from scheduling
436 * @n: napi context
437 *
438 * Stop NAPI from being scheduled on this context.
439 * Waits till any outstanding processing completes.
440 */
441static inline void napi_disable(struct napi_struct *n)
442{
David S. Millera0a46192008-01-07 20:35:07 -0800443 set_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700444 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
Benjamin Herrenschmidt43cc7382007-10-26 04:23:22 -0700445 msleep(1);
David S. Millera0a46192008-01-07 20:35:07 -0800446 clear_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700447}
448
449/**
450 * napi_enable - enable NAPI scheduling
451 * @n: napi context
452 *
453 * Resume NAPI from being scheduled on this context.
454 * Must be paired with napi_disable.
455 */
456static inline void napi_enable(struct napi_struct *n)
457{
458 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
459 smp_mb__before_clear_bit();
460 clear_bit(NAPI_STATE_SCHED, &n->state);
461}
462
Stephen Hemmingerc264c3d2007-10-17 13:26:41 -0700463#ifdef CONFIG_SMP
464/**
465 * napi_synchronize - wait until NAPI is not running
466 * @n: napi context
467 *
468 * Wait until NAPI is done being scheduled on this context.
469 * Waits till any outstanding processing completes but
470 * does not disable future activations.
471 */
472static inline void napi_synchronize(const struct napi_struct *n)
473{
474 while (test_bit(NAPI_STATE_SCHED, &n->state))
475 msleep(1);
476}
477#else
478# define napi_synchronize(n) barrier()
479#endif
480
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800481enum netdev_queue_state_t {
David S. Miller79d16382008-07-08 23:14:46 -0700482 __QUEUE_STATE_XOFF,
David S. Millerc3f26a22008-07-31 16:58:50 -0700483 __QUEUE_STATE_FROZEN,
David S. Miller79d16382008-07-08 23:14:46 -0700484};
485
David S. Millerbb949fb2008-07-08 16:55:56 -0700486struct netdev_queue {
Eric Dumazet6a321cb2009-04-28 04:43:42 -0700487/*
488 * read mostly part
489 */
David S. Millerbb949fb2008-07-08 16:55:56 -0700490 struct net_device *dev;
David S. Millerb0e1e642008-07-08 17:42:10 -0700491 struct Qdisc *qdisc;
David S. Miller79d16382008-07-08 23:14:46 -0700492 unsigned long state;
David S. Millerb0e1e642008-07-08 17:42:10 -0700493 struct Qdisc *qdisc_sleeping;
Eric Dumazet6a321cb2009-04-28 04:43:42 -0700494/*
495 * write mostly part
496 */
497 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
498 int xmit_lock_owner;
Eric Dumazet9d214932009-05-17 20:55:16 -0700499 /*
500 * please use this field instead of dev->trans_start
501 */
502 unsigned long trans_start;
Eric Dumazet7004bf22009-05-18 00:34:33 +0000503 unsigned long tx_bytes;
504 unsigned long tx_packets;
505 unsigned long tx_dropped;
David S. Millere8a04642008-07-17 00:34:19 -0700506} ____cacheline_aligned_in_smp;
David S. Millerbb949fb2008-07-08 16:55:56 -0700507
Eric Dumazetdf334542010-03-24 19:13:54 +0000508#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000509/*
510 * This structure holds an RPS map which can be of variable length. The
511 * map is an array of CPUs.
512 */
513struct rps_map {
514 unsigned int len;
515 struct rcu_head rcu;
516 u16 cpus[0];
517};
518#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
519
Tom Herbertfec5e652010-04-16 16:01:27 -0700520/*
521 * The rps_dev_flow structure contains the mapping of a flow to a CPU and the
522 * tail pointer for that CPU's input queue at the time of last enqueue.
523 */
524struct rps_dev_flow {
525 u16 cpu;
526 u16 fill;
527 unsigned int last_qtail;
528};
529
530/*
531 * The rps_dev_flow_table structure contains a table of flow mappings.
532 */
533struct rps_dev_flow_table {
534 unsigned int mask;
535 struct rcu_head rcu;
536 struct work_struct free_work;
537 struct rps_dev_flow flows[0];
538};
539#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
540 (_num * sizeof(struct rps_dev_flow)))
541
542/*
543 * The rps_sock_flow_table contains mappings of flows to the last CPU
544 * on which they were processed by the application (set in recvmsg).
545 */
546struct rps_sock_flow_table {
547 unsigned int mask;
548 u16 ents[0];
549};
550#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
551 (_num * sizeof(u16)))
552
553#define RPS_NO_CPU 0xffff
554
555static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
556 u32 hash)
557{
558 if (table && hash) {
559 unsigned int cpu, index = hash & table->mask;
560
561 /* We only give a hint, preemption can change cpu under us */
562 cpu = raw_smp_processor_id();
563
564 if (table->ents[index] != cpu)
565 table->ents[index] = cpu;
566 }
567}
568
569static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
570 u32 hash)
571{
572 if (table && hash)
573 table->ents[hash & table->mask] = RPS_NO_CPU;
574}
575
576extern struct rps_sock_flow_table *rps_sock_flow_table;
577
Tom Herbert0a9627f2010-03-16 08:03:29 +0000578/* This structure contains an instance of an RX queue. */
579struct netdev_rx_queue {
580 struct rps_map *rps_map;
Tom Herbertfec5e652010-04-16 16:01:27 -0700581 struct rps_dev_flow_table *rps_flow_table;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000582 struct kobject kobj;
583 struct netdev_rx_queue *first;
584 atomic_t count;
585} ____cacheline_aligned_in_smp;
Tom Herbertfec5e652010-04-16 16:01:27 -0700586#endif /* CONFIG_RPS */
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800587
588/*
589 * This structure defines the management hooks for network devices.
Stephen Hemminger00829822008-11-20 20:14:53 -0800590 * The following hooks can be defined; unless noted otherwise, they are
591 * optional and can be filled with a null pointer.
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800592 *
593 * int (*ndo_init)(struct net_device *dev);
594 * This function is called once when network device is registered.
595 * The network device can use this to any late stage initializaton
596 * or semantic validattion. It can fail with an error code which will
597 * be propogated back to register_netdev
598 *
599 * void (*ndo_uninit)(struct net_device *dev);
600 * This function is called when device is unregistered or when registration
601 * fails. It is not called if init fails.
602 *
603 * int (*ndo_open)(struct net_device *dev);
604 * This function is called when network device transistions to the up
605 * state.
606 *
607 * int (*ndo_stop)(struct net_device *dev);
608 * This function is called when network device transistions to the down
609 * state.
610 *
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000611 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
612 * struct net_device *dev);
Stephen Hemminger00829822008-11-20 20:14:53 -0800613 * Called when a packet needs to be transmitted.
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000614 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
615 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
Stephen Hemminger00829822008-11-20 20:14:53 -0800616 * Required can not be NULL.
617 *
618 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
619 * Called to decide which queue to when device supports multiple
620 * transmit queues.
621 *
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800622 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
623 * This function is called to allow device receiver to make
624 * changes to configuration when multicast or promiscious is enabled.
625 *
626 * void (*ndo_set_rx_mode)(struct net_device *dev);
627 * This function is called device changes address list filtering.
628 *
629 * void (*ndo_set_multicast_list)(struct net_device *dev);
630 * This function is called when the multicast address list changes.
631 *
632 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
633 * This function is called when the Media Access Control address
Mike Rapoport37b607c2009-04-27 05:45:54 -0700634 * needs to be changed. If this interface is not defined, the
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800635 * mac address can not be changed.
636 *
637 * int (*ndo_validate_addr)(struct net_device *dev);
638 * Test if Media Access Control address is valid for the device.
639 *
640 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
641 * Called when a user request an ioctl which can't be handled by
642 * the generic interface code. If not defined ioctl's return
643 * not supported error code.
644 *
645 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
646 * Used to set network devices bus interface parameters. This interface
647 * is retained for legacy reason, new devices should use the bus
648 * interface (PCI) for low level management.
649 *
650 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
651 * Called when a user wants to change the Maximum Transfer Unit
652 * of a device. If not defined, any request to change MTU will
653 * will return an error.
654 *
Stephen Hemminger00829822008-11-20 20:14:53 -0800655 * void (*ndo_tx_timeout)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800656 * Callback uses when the transmitter has not made any progress
657 * for dev->watchdog ticks.
658 *
Ben Hutchings3cfde792010-07-09 09:11:52 +0000659 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
Eric Dumazet28172732010-07-07 14:58:56 -0700660 * struct rtnl_link_stats64 *storage);
Wolfram Sangd308e382009-10-07 13:53:11 -0700661 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800662 * Called when a user wants to get the network device usage
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000663 * statistics. Drivers must do one of the following:
Ben Hutchings3cfde792010-07-09 09:11:52 +0000664 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
665 * rtnl_link_stats64 structure passed by the caller.
Ben Hutchings82695d92010-06-15 15:08:48 -0700666 * 2. Define @ndo_get_stats to update a net_device_stats structure
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000667 * (which should normally be dev->stats) and return a pointer to
668 * it. The structure may be changed asynchronously only if each
669 * field is written atomically.
670 * 3. Update dev->stats asynchronously and atomically, and define
671 * neither operation.
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800672 *
673 * void (*ndo_vlan_rx_register)(struct net_device *dev, struct vlan_group *grp);
674 * If device support VLAN receive accleration
675 * (ie. dev->features & NETIF_F_HW_VLAN_RX), then this function is called
676 * when vlan groups for the device changes. Note: grp is NULL
677 * if no vlan's groups are being used.
678 *
679 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
680 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
681 * this function is called when a VLAN id is registered.
682 *
683 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
684 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
685 * this function is called when a VLAN id is unregistered.
686 *
687 * void (*ndo_poll_controller)(struct net_device *dev);
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000688 *
689 * SR-IOV management functions.
690 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
691 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
692 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
693 * int (*ndo_get_vf_config)(struct net_device *dev,
694 * int vf, struct ifla_vf_info *ivf);
Scott Feldman57b61082010-05-17 22:49:55 -0700695 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
696 * struct nlattr *port[]);
697 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800698 */
Stephen Hemminger47fd5b82008-11-25 00:20:43 -0800699#define HAVE_NET_DEVICE_OPS
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800700struct net_device_ops {
701 int (*ndo_init)(struct net_device *dev);
702 void (*ndo_uninit)(struct net_device *dev);
703 int (*ndo_open)(struct net_device *dev);
704 int (*ndo_stop)(struct net_device *dev);
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000705 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
Stephen Hemminger00829822008-11-20 20:14:53 -0800706 struct net_device *dev);
707 u16 (*ndo_select_queue)(struct net_device *dev,
708 struct sk_buff *skb);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800709 void (*ndo_change_rx_flags)(struct net_device *dev,
710 int flags);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800711 void (*ndo_set_rx_mode)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800712 void (*ndo_set_multicast_list)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800713 int (*ndo_set_mac_address)(struct net_device *dev,
714 void *addr);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800715 int (*ndo_validate_addr)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800716 int (*ndo_do_ioctl)(struct net_device *dev,
717 struct ifreq *ifr, int cmd);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800718 int (*ndo_set_config)(struct net_device *dev,
719 struct ifmap *map);
Stephen Hemminger00829822008-11-20 20:14:53 -0800720 int (*ndo_change_mtu)(struct net_device *dev,
721 int new_mtu);
722 int (*ndo_neigh_setup)(struct net_device *dev,
723 struct neigh_parms *);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800724 void (*ndo_tx_timeout) (struct net_device *dev);
725
Eric Dumazet28172732010-07-07 14:58:56 -0700726 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
727 struct rtnl_link_stats64 *storage);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800728 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
729
730 void (*ndo_vlan_rx_register)(struct net_device *dev,
731 struct vlan_group *grp);
732 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
733 unsigned short vid);
734 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
735 unsigned short vid);
736#ifdef CONFIG_NET_POLL_CONTROLLER
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800737 void (*ndo_poll_controller)(struct net_device *dev);
Herbert Xu4247e162010-06-10 16:12:47 +0000738 int (*ndo_netpoll_setup)(struct net_device *dev,
739 struct netpoll_info *info);
WANG Cong0e34e932010-05-06 00:47:21 -0700740 void (*ndo_netpoll_cleanup)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800741#endif
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000742 int (*ndo_set_vf_mac)(struct net_device *dev,
743 int queue, u8 *mac);
744 int (*ndo_set_vf_vlan)(struct net_device *dev,
745 int queue, u16 vlan, u8 qos);
746 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
747 int vf, int rate);
748 int (*ndo_get_vf_config)(struct net_device *dev,
749 int vf,
750 struct ifla_vf_info *ivf);
Scott Feldman57b61082010-05-17 22:49:55 -0700751 int (*ndo_set_vf_port)(struct net_device *dev,
752 int vf,
753 struct nlattr *port[]);
754 int (*ndo_get_vf_port)(struct net_device *dev,
755 int vf, struct sk_buff *skb);
Yi Zou4d288d52009-02-27 14:06:59 -0800756#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
Yi Zoucb454392009-08-31 12:31:36 +0000757 int (*ndo_fcoe_enable)(struct net_device *dev);
758 int (*ndo_fcoe_disable)(struct net_device *dev);
Yi Zou4d288d52009-02-27 14:06:59 -0800759 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
760 u16 xid,
761 struct scatterlist *sgl,
762 unsigned int sgc);
763 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
764 u16 xid);
Yi Zoudf5c7942009-10-28 18:24:35 +0000765#define NETDEV_FCOE_WWNN 0
766#define NETDEV_FCOE_WWPN 1
767 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
768 u64 *wwn, int type);
Yi Zou4d288d52009-02-27 14:06:59 -0800769#endif
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800770};
771
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700772/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 * The DEVICE structure.
774 * Actually, this whole structure is a big mistake. It mixes I/O
775 * data with strictly "high-level" data, and it has to know about
776 * almost every data structure used in the INET module.
777 *
778 * FIXME: cleanup struct net_device such that network protocol info
779 * moves out.
780 */
781
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800782struct net_device {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783
784 /*
785 * This is the first field of the "visible" part of this structure
786 * (i.e. as seen by users in the "Space.c" file). It is the name
787 * the interface.
788 */
789 char name[IFNAMSIZ];
Mark Grossed771342010-05-06 01:59:26 +0200790
791 struct pm_qos_request_list *pm_qos_req;
792
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700793 /* device name hash chain */
794 struct hlist_node name_hlist;
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700795 /* snmp alias */
796 char *ifalias;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797
798 /*
799 * I/O specific fields
800 * FIXME: Merge these and struct ifmap into one
801 */
802 unsigned long mem_end; /* shared mem end */
803 unsigned long mem_start; /* shared mem start */
804 unsigned long base_addr; /* device I/O address */
805 unsigned int irq; /* device IRQ number */
806
807 /*
808 * Some hardware also needs these fields, but they are not
809 * part of the usual set specified in Space.c.
810 */
811
812 unsigned char if_port; /* Selectable AUI, TP,..*/
813 unsigned char dma; /* DMA channel */
814
815 unsigned long state;
816
Pavel Emelianov7562f872007-05-03 15:13:45 -0700817 struct list_head dev_list;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700818 struct list_head napi_list;
Eric Dumazet44a08732009-10-27 07:03:04 +0000819 struct list_head unreg_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700821 /* Net device features */
822 unsigned long features;
823#define NETIF_F_SG 1 /* Scatter/gather IO. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700824#define NETIF_F_IP_CSUM 2 /* Can checksum TCP/UDP over IPv4. */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700825#define NETIF_F_NO_CSUM 4 /* Does not require checksum. F.e. loopack. */
826#define NETIF_F_HW_CSUM 8 /* Can checksum all the packets. */
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700827#define NETIF_F_IPV6_CSUM 16 /* Can checksum TCP/UDP over IPV6 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700828#define NETIF_F_HIGHDMA 32 /* Can DMA to high memory. */
829#define NETIF_F_FRAGLIST 64 /* Scatter/gather IO. */
830#define NETIF_F_HW_VLAN_TX 128 /* Transmit VLAN hw acceleration */
831#define NETIF_F_HW_VLAN_RX 256 /* Receive VLAN hw acceleration */
832#define NETIF_F_HW_VLAN_FILTER 512 /* Receive filtering on VLAN */
833#define NETIF_F_VLAN_CHALLENGED 1024 /* Device cannot handle VLAN packets */
Herbert Xu37c31852006-06-22 03:07:29 -0700834#define NETIF_F_GSO 2048 /* Enable software GSO. */
Christian Borntraegere24eb522007-09-25 19:42:02 -0700835#define NETIF_F_LLTX 4096 /* LockLess TX - deprecated. Please */
836 /* do not use LLTX in new drivers */
Eric W. Biedermance286d32007-09-12 13:53:49 +0200837#define NETIF_F_NETNS_LOCAL 8192 /* Does not change network namespaces */
Herbert Xud565b0a2008-12-15 23:38:52 -0800838#define NETIF_F_GRO 16384 /* Generic receive offload */
Jeff Garzik3ae7c0b2007-08-15 16:00:51 -0700839#define NETIF_F_LRO 32768 /* large receive offload */
Herbert Xu79671682006-06-22 02:40:14 -0700840
Jesse Brandeburg8dc92f72009-04-27 22:35:52 +0000841/* the GSO_MASK reserves bits 16 through 23 */
Chris Leech01d5b2f2009-02-27 14:06:49 -0800842#define NETIF_F_FCOE_CRC (1 << 24) /* FCoE CRC32 */
Jesse Brandeburg8dc92f72009-04-27 22:35:52 +0000843#define NETIF_F_SCTP_CSUM (1 << 25) /* SCTP checksum offload */
Yi Zoubb2af4f2009-08-14 12:41:57 +0000844#define NETIF_F_FCOE_MTU (1 << 26) /* Supports max FCoE MTU, 2158 bytes*/
Peter P Waskiewicz Jr15682bc2010-02-10 20:03:05 -0800845#define NETIF_F_NTUPLE (1 << 27) /* N-tuple filters supported */
stephen hemmingerb00fabb2010-03-29 14:47:27 +0000846#define NETIF_F_RXHASH (1 << 28) /* Receive hashing offload */
Chris Leech01d5b2f2009-02-27 14:06:49 -0800847
Herbert Xu79671682006-06-22 02:40:14 -0700848 /* Segmentation offload features */
Patrick McHardy289c79a2008-05-23 00:22:04 -0700849#define NETIF_F_GSO_SHIFT 16
Chris Leech43eb99c2009-02-27 14:06:43 -0800850#define NETIF_F_GSO_MASK 0x00ff0000
Herbert Xu79671682006-06-22 02:40:14 -0700851#define NETIF_F_TSO (SKB_GSO_TCPV4 << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700852#define NETIF_F_UFO (SKB_GSO_UDP << NETIF_F_GSO_SHIFT)
Herbert Xu576a30e2006-06-27 13:22:38 -0700853#define NETIF_F_GSO_ROBUST (SKB_GSO_DODGY << NETIF_F_GSO_SHIFT)
Herbert Xuf83ef8c2006-06-30 13:37:03 -0700854#define NETIF_F_TSO_ECN (SKB_GSO_TCP_ECN << NETIF_F_GSO_SHIFT)
855#define NETIF_F_TSO6 (SKB_GSO_TCPV6 << NETIF_F_GSO_SHIFT)
Chris Leech01d5b2f2009-02-27 14:06:49 -0800856#define NETIF_F_FSO (SKB_GSO_FCOE << NETIF_F_GSO_SHIFT)
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700857
Herbert Xu78eb8872006-08-17 18:22:32 -0700858 /* List of features with software fallbacks. */
Herbert Xud29c0c52010-06-14 20:21:04 +0000859#define NETIF_F_GSO_SOFTWARE (NETIF_F_TSO | NETIF_F_TSO_ECN | \
860 NETIF_F_TSO6 | NETIF_F_UFO)
Herbert Xu78eb8872006-08-17 18:22:32 -0700861
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700862
Herbert Xu8648b302006-06-17 22:06:05 -0700863#define NETIF_F_GEN_CSUM (NETIF_F_NO_CSUM | NETIF_F_HW_CSUM)
Stephen Hemmingerd212f872007-06-27 00:47:37 -0700864#define NETIF_F_V4_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
865#define NETIF_F_V6_CSUM (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
866#define NETIF_F_ALL_CSUM (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
Herbert Xu8648b302006-06-17 22:06:05 -0700867
Herbert Xub63365a2008-10-23 01:11:29 -0700868 /*
869 * If one device supports one of these features, then enable them
870 * for all in netdev_increment_features.
871 */
872#define NETIF_F_ONE_FOR_ALL (NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ROBUST | \
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800873 NETIF_F_SG | NETIF_F_HIGHDMA | \
Herbert Xub63365a2008-10-23 01:11:29 -0700874 NETIF_F_FRAGLIST)
875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 /* Interface index. Unique device identifier */
877 int ifindex;
878 int iflink;
879
Ben Hutchings3cfde792010-07-09 09:11:52 +0000880 struct net_device_stats stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Johannes Bergb86e0282007-04-26 20:48:23 -0700882#ifdef CONFIG_WIRELESS_EXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 /* List of functions to handle Wireless Extensions (instead of ioctl).
884 * See <net/iw_handler.h> for details. Jean II */
885 const struct iw_handler_def * wireless_handlers;
886 /* Instance data managed by the core of Wireless Extensions. */
887 struct iw_public_data * wireless_data;
Johannes Bergb86e0282007-04-26 20:48:23 -0700888#endif
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800889 /* Management operations */
890 const struct net_device_ops *netdev_ops;
Stephen Hemminger76fd8592006-09-08 11:16:13 -0700891 const struct ethtool_ops *ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700893 /* Hardware header description */
894 const struct header_ops *header_ops;
895
Stefan Rompfb00055a2006-03-20 17:09:11 -0800896 unsigned int flags; /* interface flags (a la BSD) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 unsigned short gflags;
898 unsigned short priv_flags; /* Like 'flags' but invisible to userspace. */
899 unsigned short padded; /* How much padding added by alloc_netdev() */
900
Stefan Rompfb00055a2006-03-20 17:09:11 -0800901 unsigned char operstate; /* RFC2863 operstate */
902 unsigned char link_mode; /* mapping policy to operstate */
903
David S. Millercd7b5392010-05-02 22:27:59 -0700904 unsigned int mtu; /* interface MTU value */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 unsigned short type; /* interface hardware type */
906 unsigned short hard_header_len; /* hardware hdr length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907
Johannes Bergf5184d22008-05-12 20:48:31 -0700908 /* extra head- and tailroom the hardware may need, but not in all cases
909 * can this be guaranteed, especially tailroom. Some cases also use
910 * LL_MAX_HEADER instead to allocate the skb.
911 */
912 unsigned short needed_headroom;
913 unsigned short needed_tailroom;
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 struct net_device *master; /* Pointer to master device of a group,
916 * which this device is member of.
917 */
918
919 /* Interface address info. */
Jon Wetzela6f9a702005-08-20 17:15:54 -0700920 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 unsigned char addr_len; /* hardware address length */
922 unsigned short dev_id; /* for shared network cards */
923
Jiri Pirkoccffad252009-05-22 23:22:17 +0000924 spinlock_t addr_list_lock;
Jiri Pirko22bedad2010-04-01 21:22:57 +0000925 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
926 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
927 int uc_promisc;
Wang Chen9d45abe2008-06-17 21:12:48 -0700928 unsigned int promiscuity;
929 unsigned int allmulti;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
932 /* Protocol specific pointers */
933
Lennert Buytenhek91da11f2008-10-07 13:44:02 +0000934#ifdef CONFIG_NET_DSA
935 void *dsa_ptr; /* dsa specific data */
936#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 void *atalk_ptr; /* AppleTalk link */
Graf Yangfe2918b2009-02-05 21:26:19 -0800938 void *ip_ptr; /* IPv4 specific data */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 void *dn_ptr; /* DECnet specific data */
940 void *ip6_ptr; /* IPv6 specific data */
941 void *ec_ptr; /* Econet specific data */
942 void *ax25_ptr; /* AX.25 specific data */
Johannes Berg704232c2007-04-23 12:20:05 -0700943 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
944 assign before registering */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700946/*
947 * Cache line mostly used on receive path (including eth_type_trans())
948 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700949 unsigned long last_rx; /* Time of last Rx */
950 /* Interface address info used in eth_type_trans() */
Jiri Pirkof001fde2009-05-05 02:48:28 +0000951 unsigned char *dev_addr; /* hw address, (before bcast
952 because most packets are
953 unicast) */
954
Jiri Pirko31278e72009-06-17 01:12:19 +0000955 struct netdev_hw_addr_list dev_addrs; /* list of device
956 hw addresses */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700958 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
959
Eric Dumazetdf334542010-03-24 19:13:54 +0000960#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000961 struct kset *queues_kset;
962
963 struct netdev_rx_queue *_rx;
964
965 /* Number of RX queues allocated at alloc_netdev_mq() time */
966 unsigned int num_rx_queues;
Eric Dumazetdf334542010-03-24 19:13:54 +0000967#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +0000968
David S. Millerbb949fb2008-07-08 16:55:56 -0700969 struct netdev_queue rx_queue;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000970 rx_handler_func_t *rx_handler;
Jiri Pirko93e2c322010-06-10 03:34:59 +0000971 void *rx_handler_data;
David S. Millere8a04642008-07-17 00:34:19 -0700972
973 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700974
975 /* Number of TX queues allocated at alloc_netdev_mq() time */
David S. Millere8a04642008-07-17 00:34:19 -0700976 unsigned int num_tx_queues;
David S. Millerfd2ea0a2008-07-17 01:56:23 -0700977
978 /* Number of TX queues currently active in device */
979 unsigned int real_num_tx_queues;
980
Patrick McHardyaf356af2009-09-04 06:41:18 +0000981 /* root qdisc from userspace point of view */
982 struct Qdisc *qdisc;
983
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 unsigned long tx_queue_len; /* Max frames per queue allowed */
David S. Millerc3f26a22008-07-31 16:58:50 -0700985 spinlock_t tx_global_lock;
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700986/*
987 * One part is mostly used on xmit path (device)
988 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700989 /* These may be needed for future network-power-down code. */
Eric Dumazet9d214932009-05-17 20:55:16 -0700990
991 /*
992 * trans_start here is expensive for high speed devices on SMP,
993 * please use netdev_queue->trans_start instead.
994 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700995 unsigned long trans_start; /* Time (in jiffies) of last Tx */
996
997 int watchdog_timeo; /* used by dev_watchdog() */
998 struct timer_list watchdog_timer;
999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 /* Number of references to this device */
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001001 atomic_t refcnt ____cacheline_aligned_in_smp;
1002
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 /* delayed register/unregister */
1004 struct list_head todo_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 /* device index hash chain */
1006 struct hlist_node index_hlist;
1007
Eric Dumazete014deb2009-11-17 05:59:21 +00001008 struct list_head link_watch_list;
Herbert Xu572a1032007-05-08 18:34:17 -07001009
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 /* register/unregister state machine */
1011 enum { NETREG_UNINITIALIZED=0,
Stephen Hemmingerb17a7c12006-05-10 13:21:17 -07001012 NETREG_REGISTERED, /* completed register_netdevice */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 NETREG_UNREGISTERING, /* called unregister_netdevice */
1014 NETREG_UNREGISTERED, /* completed unregister todo */
1015 NETREG_RELEASED, /* called free_netdev */
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001016 NETREG_DUMMY, /* dummy device for NAPI poll */
Patrick McHardya2835762010-02-26 06:34:51 +00001017 } reg_state:16;
1018
1019 enum {
1020 RTNL_LINK_INITIALIZED,
1021 RTNL_LINK_INITIALIZING,
1022 } rtnl_link_state:16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001024 /* Called from unregister, can be used to call free_netdev */
1025 void (*destructor)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027#ifdef CONFIG_NETPOLL
Jeff Moyer115c1d62005-06-22 22:05:31 -07001028 struct netpoll_info *npinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029#endif
David S. Millereae792b2008-07-15 03:03:33 -07001030
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001031#ifdef CONFIG_NET_NS
Eric W. Biederman4a1c5372007-09-12 11:56:32 +02001032 /* Network namespace this network device is inside */
1033 struct net *nd_net;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001034#endif
Eric W. Biederman4a1c5372007-09-12 11:56:32 +02001035
David S. Miller49517042008-05-12 03:29:11 -07001036 /* mid-layer private */
1037 void *ml_priv;
1038
Patrick McHardyeca9eba2008-07-05 21:26:13 -07001039 /* GARP */
1040 struct garp_port *garp_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 /* class/net/name entry */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001043 struct device dev;
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001044 /* space for optional device, statistics, and wireless sysfs groups */
1045 const struct attribute_group *sysfs_groups[4];
Patrick McHardy38f7b872007-06-13 12:03:51 -07001046
1047 /* rtnetlink link ops */
1048 const struct rtnl_link_ops *rtnl_link_ops;
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001049
Patrick McHardy289c79a2008-05-23 00:22:04 -07001050 /* VLAN feature mask */
1051 unsigned long vlan_features;
1052
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -07001053 /* for setting kernel sock attribute on TCP connection setup */
1054#define GSO_MAX_SIZE 65536
1055 unsigned int gso_max_size;
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001056
Jeff Kirsher7a6b6f52008-11-25 01:02:08 -08001057#ifdef CONFIG_DCB
Alexander Duyck2f90b862008-11-20 20:52:10 -08001058 /* Data Center Bridging netlink ops */
Stephen Hemminger32953542009-10-05 06:01:03 +00001059 const struct dcbnl_rtnl_ops *dcbnl_ops;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001060#endif
1061
Yi Zou4d288d52009-02-27 14:06:59 -08001062#if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
1063 /* max exchange id for FCoE LRO by ddp */
1064 unsigned int fcoe_ddp_xid;
1065#endif
Peter P Waskiewicz Jr15682bc2010-02-10 20:03:05 -08001066 /* n-tuple filter list attached to this device */
1067 struct ethtool_rx_ntuple_list ethtool_ntuple_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068};
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001069#define to_net_dev(d) container_of(d, struct net_device, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070
1071#define NETDEV_ALIGN 32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
David S. Millere8a04642008-07-17 00:34:19 -07001073static inline
1074struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1075 unsigned int index)
1076{
1077 return &dev->_tx[index];
1078}
1079
1080static inline void netdev_for_each_tx_queue(struct net_device *dev,
1081 void (*f)(struct net_device *,
1082 struct netdev_queue *,
1083 void *),
1084 void *arg)
1085{
1086 unsigned int i;
1087
1088 for (i = 0; i < dev->num_tx_queues; i++)
1089 f(dev, &dev->_tx[i], arg);
1090}
1091
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001092/*
1093 * Net namespace inlines
1094 */
1095static inline
1096struct net *dev_net(const struct net_device *dev)
1097{
Eric Dumazetc2d9ba92010-06-01 06:51:19 +00001098 return read_pnet(&dev->nd_net);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001099}
1100
1101static inline
Denis V. Lunevf5aa23f2008-03-26 00:48:17 -07001102void dev_net_set(struct net_device *dev, struct net *net)
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001103{
1104#ifdef CONFIG_NET_NS
Denis V. Lunevf3005d72008-04-16 02:02:18 -07001105 release_net(dev->nd_net);
1106 dev->nd_net = hold_net(net);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001107#endif
1108}
1109
Lennert Buytenhekcf85d082008-10-07 13:45:02 +00001110static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1111{
1112#ifdef CONFIG_NET_DSA_TAG_DSA
1113 if (dev->dsa_ptr != NULL)
1114 return dsa_uses_dsa_tags(dev->dsa_ptr);
1115#endif
1116
1117 return 0;
1118}
1119
Arnd Bergmann8a83a002010-01-30 12:23:03 +00001120#ifndef CONFIG_NET_NS
1121static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1122{
1123 skb->dev = dev;
1124}
1125#else /* CONFIG_NET_NS */
1126void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1127#endif
1128
Lennert Buytenhek396138f2008-10-07 13:46:07 +00001129static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1130{
1131#ifdef CONFIG_NET_DSA_TAG_TRAILER
1132 if (dev->dsa_ptr != NULL)
1133 return dsa_uses_trailer_tags(dev->dsa_ptr);
1134#endif
1135
1136 return 0;
1137}
1138
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001139/**
1140 * netdev_priv - access network device private data
1141 * @dev: network device
1142 *
1143 * Get network device private data
1144 */
Patrick McHardy6472ce62007-06-13 12:03:21 -07001145static inline void *netdev_priv(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146{
Eric Dumazet1ce8e7b2009-05-27 04:42:37 +00001147 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148}
1149
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150/* Set the sysfs physical device reference for the network logical device
1151 * if set prior to registration will cause a symlink during initialization.
1152 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001153#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154
Marcel Holtmann384912e2009-08-31 21:08:19 +00001155/* Set the sysfs device type for the network logical device to allow
1156 * fin grained indentification of different network device types. For
1157 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1158 */
1159#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1160
Stephen Hemminger3b582cc2007-11-01 02:21:47 -07001161/**
1162 * netif_napi_add - initialize a napi context
1163 * @dev: network device
1164 * @napi: napi context
1165 * @poll: polling function
1166 * @weight: default weight
1167 *
1168 * netif_napi_add() must be used to initialize a napi context prior to calling
1169 * *any* of the other napi related functions.
1170 */
Herbert Xud565b0a2008-12-15 23:38:52 -08001171void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1172 int (*poll)(struct napi_struct *, int), int weight);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001173
Alexander Duyckd8156532008-07-08 15:13:05 -07001174/**
1175 * netif_napi_del - remove a napi context
1176 * @napi: napi context
1177 *
1178 * netif_napi_del() removes a napi context from the network device napi list
1179 */
Herbert Xud565b0a2008-12-15 23:38:52 -08001180void netif_napi_del(struct napi_struct *napi);
1181
1182struct napi_gro_cb {
Herbert Xu78a478d2009-05-26 18:50:21 +00001183 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1184 void *frag0;
1185
Herbert Xu74895942009-05-26 18:50:27 +00001186 /* Length of frag0. */
1187 unsigned int frag0_len;
1188
Herbert Xu86911732009-01-29 14:19:50 +00001189 /* This indicates where we are processing relative to skb->data. */
1190 int data_offset;
1191
Herbert Xud565b0a2008-12-15 23:38:52 -08001192 /* This is non-zero if the packet may be of the same flow. */
1193 int same_flow;
1194
1195 /* This is non-zero if the packet cannot be merged with the new skb. */
1196 int flush;
1197
1198 /* Number of segments aggregated. */
1199 int count;
Herbert Xu5d38a072009-01-04 16:13:40 -08001200
1201 /* Free the skb? */
1202 int free;
Herbert Xud565b0a2008-12-15 23:38:52 -08001203};
1204
1205#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
Alexander Duyckd8156532008-07-08 15:13:05 -07001206
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207struct packet_type {
David S. Millerf2ccd8f2005-08-09 19:34:12 -07001208 __be16 type; /* This is really htons(ether_type). */
1209 struct net_device *dev; /* NULL is wildcarded here */
1210 int (*func) (struct sk_buff *,
1211 struct net_device *,
1212 struct packet_type *,
1213 struct net_device *);
Herbert Xu576a30e2006-06-27 13:22:38 -07001214 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
1215 int features);
Herbert Xua430a432006-07-08 13:34:56 -07001216 int (*gso_send_check)(struct sk_buff *skb);
Herbert Xud565b0a2008-12-15 23:38:52 -08001217 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1218 struct sk_buff *skb);
1219 int (*gro_complete)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 void *af_packet_priv;
1221 struct list_head list;
1222};
1223
1224#include <linux/interrupt.h>
1225#include <linux/notifier.h>
1226
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227extern rwlock_t dev_base_lock; /* Device list lock */
1228
Eric W. Biederman881d9662007-09-17 11:56:21 -07001229
1230#define for_each_netdev(net, d) \
1231 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
Eric W. Biedermandcbccbd42009-11-29 22:25:26 +00001232#define for_each_netdev_reverse(net, d) \
1233 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
Eric Dumazetc6d14c82009-11-04 05:43:23 -08001234#define for_each_netdev_rcu(net, d) \
1235 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001236#define for_each_netdev_safe(net, d, n) \
1237 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1238#define for_each_netdev_continue(net, d) \
1239 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
stephen hemminger254245d2009-11-10 07:54:47 +00001240#define for_each_netdev_continue_rcu(net, d) \
1241 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
Pavel Emelianov7562f872007-05-03 15:13:45 -07001242#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1243
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001244static inline struct net_device *next_net_device(struct net_device *dev)
1245{
1246 struct list_head *lh;
1247 struct net *net;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001248
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001249 net = dev_net(dev);
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001250 lh = dev->dev_list.next;
1251 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1252}
1253
Eric Dumazetce81b762009-11-11 17:34:30 +00001254static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1255{
1256 struct list_head *lh;
1257 struct net *net;
1258
1259 net = dev_net(dev);
1260 lh = rcu_dereference(dev->dev_list.next);
1261 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1262}
1263
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001264static inline struct net_device *first_net_device(struct net *net)
1265{
1266 return list_empty(&net->dev_base_head) ? NULL :
1267 net_device_entry(net->dev_base_head.next);
1268}
Pavel Emelianov7562f872007-05-03 15:13:45 -07001269
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270extern int netdev_boot_setup_check(struct net_device *dev);
1271extern unsigned long netdev_boot_base(const char *prefix, int unit);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001272extern struct net_device *dev_getbyhwaddr(struct net *net, unsigned short type, char *hwaddr);
1273extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1274extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275extern void dev_add_pack(struct packet_type *pt);
1276extern void dev_remove_pack(struct packet_type *pt);
1277extern void __dev_remove_pack(struct packet_type *pt);
1278
Eric Dumazetbb69ae02010-06-07 11:42:13 +00001279extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1280 unsigned short mask);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001281extern struct net_device *dev_get_by_name(struct net *net, const char *name);
Eric Dumazet72c95282009-10-30 07:11:27 +00001282extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001283extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284extern int dev_alloc_name(struct net_device *dev, const char *name);
1285extern int dev_open(struct net_device *dev);
1286extern int dev_close(struct net_device *dev);
Ben Hutchings0187bdf2008-06-19 16:15:47 -07001287extern void dev_disable_lro(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288extern int dev_queue_xmit(struct sk_buff *skb);
1289extern int register_netdevice(struct net_device *dev);
Eric Dumazet44a08732009-10-27 07:03:04 +00001290extern void unregister_netdevice_queue(struct net_device *dev,
1291 struct list_head *head);
Eric Dumazet9b5e3832009-10-27 07:04:19 +00001292extern void unregister_netdevice_many(struct list_head *head);
Eric Dumazet44a08732009-10-27 07:03:04 +00001293static inline void unregister_netdevice(struct net_device *dev)
1294{
1295 unregister_netdevice_queue(dev, NULL);
1296}
1297
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298extern void free_netdev(struct net_device *dev);
1299extern void synchronize_net(void);
1300extern int register_netdevice_notifier(struct notifier_block *nb);
1301extern int unregister_netdevice_notifier(struct notifier_block *nb);
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001302extern int init_dummy_netdev(struct net_device *dev);
David S. Miller9d40bbd2009-03-04 23:46:25 -08001303extern void netdev_resync_ops(struct net_device *dev);
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001304
Eric W. Biedermanad7379d2007-09-16 15:33:32 -07001305extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001306extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1307extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
Eric Dumazetfb699dfd2009-10-19 19:18:49 +00001308extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309extern int dev_restart(struct net_device *dev);
1310#ifdef CONFIG_NETPOLL_TRAP
1311extern int netpoll_trap(void);
1312#endif
Herbert Xu86911732009-01-29 14:19:50 +00001313extern int skb_gro_receive(struct sk_buff **head,
1314 struct sk_buff *skb);
Herbert Xu78a478d2009-05-26 18:50:21 +00001315extern void skb_gro_reset_offset(struct sk_buff *skb);
Herbert Xu86911732009-01-29 14:19:50 +00001316
1317static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1318{
1319 return NAPI_GRO_CB(skb)->data_offset;
1320}
1321
1322static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1323{
1324 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1325}
1326
1327static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1328{
1329 NAPI_GRO_CB(skb)->data_offset += len;
1330}
1331
Herbert Xua5b1cf22009-05-26 18:50:28 +00001332static inline void *skb_gro_header_fast(struct sk_buff *skb,
1333 unsigned int offset)
Herbert Xu86911732009-01-29 14:19:50 +00001334{
Herbert Xu78a478d2009-05-26 18:50:21 +00001335 return NAPI_GRO_CB(skb)->frag0 + offset;
Herbert Xu86911732009-01-29 14:19:50 +00001336}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337
Herbert Xua5b1cf22009-05-26 18:50:28 +00001338static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1339{
1340 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1341}
1342
1343static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1344 unsigned int offset)
1345{
1346 NAPI_GRO_CB(skb)->frag0 = NULL;
1347 NAPI_GRO_CB(skb)->frag0_len = 0;
1348 return pskb_may_pull(skb, hlen) ? skb->data + offset : NULL;
1349}
1350
Herbert Xuaa4b9f52009-02-08 18:00:37 +00001351static inline void *skb_gro_mac_header(struct sk_buff *skb)
1352{
Herbert Xu78d3fd02009-05-26 18:50:23 +00001353 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
Herbert Xuaa4b9f52009-02-08 18:00:37 +00001354}
1355
Herbert Xu36e7b1b2009-04-27 05:44:45 -07001356static inline void *skb_gro_network_header(struct sk_buff *skb)
1357{
Herbert Xu78d3fd02009-05-26 18:50:23 +00001358 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1359 skb_network_offset(skb);
Herbert Xu36e7b1b2009-04-27 05:44:45 -07001360}
1361
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001362static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1363 unsigned short type,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001364 const void *daddr, const void *saddr,
1365 unsigned len)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001366{
Ursula Braunf1ecfd52007-10-22 16:16:14 +02001367 if (!dev->header_ops || !dev->header_ops->create)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001368 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001369
1370 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001371}
1372
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001373static inline int dev_parse_header(const struct sk_buff *skb,
1374 unsigned char *haddr)
1375{
1376 const struct net_device *dev = skb->dev;
1377
Patrick McHardy1b833362007-10-18 05:09:28 -07001378 if (!dev->header_ops || !dev->header_ops->parse)
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001379 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001380 return dev->header_ops->parse(skb, haddr);
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001381}
1382
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1384extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1385static inline int unregister_gifconf(unsigned int family)
1386{
1387 return register_gifconf(family, NULL);
1388}
1389
1390/*
Eric Dumazet88751272010-04-19 05:07:33 +00001391 * Incoming packets are placed on per-cpu queues
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 */
Eric Dumazetd94d9fe2009-11-04 09:50:58 -08001393struct softnet_data {
David S. Miller37437bb2008-07-16 02:15:04 -07001394 struct Qdisc *output_queue;
Changli Gaoa9cbd582010-04-26 23:06:24 +00001395 struct Qdisc **output_queue_tailp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 struct list_head poll_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 struct sk_buff *completion_queue;
Changli Gao6e7676c2010-04-27 15:07:33 -07001398 struct sk_buff_head process_queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399
Changli Gaodee42872010-05-02 05:42:16 +00001400 /* stats */
David S. Millercd7b5392010-05-02 22:27:59 -07001401 unsigned int processed;
1402 unsigned int time_squeeze;
1403 unsigned int cpu_collision;
1404 unsigned int received_rps;
Changli Gaodee42872010-05-02 05:42:16 +00001405
Changli Gaofd793d82010-04-15 00:16:59 -07001406#ifdef CONFIG_RPS
Eric Dumazet88751272010-04-19 05:07:33 +00001407 struct softnet_data *rps_ipi_list;
1408
1409 /* Elements below can be accessed between CPUs for RPS */
Tom Herbert0a9627f2010-03-16 08:03:29 +00001410 struct call_single_data csd ____cacheline_aligned_in_smp;
Eric Dumazet88751272010-04-19 05:07:33 +00001411 struct softnet_data *rps_ipi_next;
1412 unsigned int cpu;
Tom Herbertfec5e652010-04-16 16:01:27 -07001413 unsigned int input_queue_head;
Tom Herbert76cc8b12010-05-20 18:37:59 +00001414 unsigned int input_queue_tail;
Tom Herbert1e94d722010-03-18 17:45:44 -07001415#endif
Changli Gaodee42872010-05-02 05:42:16 +00001416 unsigned dropped;
Tom Herbert0a9627f2010-03-16 08:03:29 +00001417 struct sk_buff_head input_pkt_queue;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001418 struct napi_struct backlog;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419};
1420
Tom Herbert76cc8b12010-05-20 18:37:59 +00001421static inline void input_queue_head_incr(struct softnet_data *sd)
Tom Herbertfec5e652010-04-16 16:01:27 -07001422{
1423#ifdef CONFIG_RPS
Tom Herbert76cc8b12010-05-20 18:37:59 +00001424 sd->input_queue_head++;
1425#endif
1426}
1427
1428static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1429 unsigned int *qtail)
1430{
1431#ifdef CONFIG_RPS
1432 *qtail = ++sd->input_queue_tail;
Tom Herbertfec5e652010-04-16 16:01:27 -07001433#endif
1434}
1435
Tom Herbert0a9627f2010-03-16 08:03:29 +00001436DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437
1438#define HAVE_NETIF_QUEUE
1439
David S. Miller37437bb2008-07-16 02:15:04 -07001440extern void __netif_schedule(struct Qdisc *q);
David S. Miller86d804e2008-07-08 23:11:25 -07001441
1442static inline void netif_schedule_queue(struct netdev_queue *txq)
1443{
David S. Miller79d16382008-07-08 23:14:46 -07001444 if (!test_bit(__QUEUE_STATE_XOFF, &txq->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001445 __netif_schedule(txq->qdisc);
David S. Miller86d804e2008-07-08 23:11:25 -07001446}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001448static inline void netif_tx_schedule_all(struct net_device *dev)
1449{
1450 unsigned int i;
1451
1452 for (i = 0; i < dev->num_tx_queues; i++)
1453 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1454}
1455
Dave Jonesd29f7492008-07-22 14:09:06 -07001456static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1457{
1458 clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1459}
1460
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001461/**
1462 * netif_start_queue - allow transmit
1463 * @dev: network device
1464 *
1465 * Allow upper layers to call the device hard_start_xmit routine.
1466 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467static inline void netif_start_queue(struct net_device *dev)
1468{
David S. Millere8a04642008-07-17 00:34:19 -07001469 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470}
1471
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001472static inline void netif_tx_start_all_queues(struct net_device *dev)
1473{
1474 unsigned int i;
1475
1476 for (i = 0; i < dev->num_tx_queues; i++) {
1477 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1478 netif_tx_start_queue(txq);
1479 }
1480}
1481
David S. Miller79d16382008-07-08 23:14:46 -07001482static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483{
1484#ifdef CONFIG_NETPOLL_TRAP
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001485 if (netpoll_trap()) {
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001486 netif_tx_start_queue(dev_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 return;
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001488 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489#endif
David S. Miller79d16382008-07-08 23:14:46 -07001490 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001491 __netif_schedule(dev_queue->qdisc);
David S. Miller79d16382008-07-08 23:14:46 -07001492}
1493
Dave Jonesd29f7492008-07-22 14:09:06 -07001494/**
1495 * netif_wake_queue - restart transmit
1496 * @dev: network device
1497 *
1498 * Allow upper layers to call the device hard_start_xmit routine.
1499 * Used for flow control when transmit resources are available.
1500 */
David S. Miller79d16382008-07-08 23:14:46 -07001501static inline void netif_wake_queue(struct net_device *dev)
1502{
David S. Millere8a04642008-07-17 00:34:19 -07001503 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504}
1505
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001506static inline void netif_tx_wake_all_queues(struct net_device *dev)
1507{
1508 unsigned int i;
1509
1510 for (i = 0; i < dev->num_tx_queues; i++) {
1511 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1512 netif_tx_wake_queue(txq);
1513 }
1514}
1515
Dave Jonesd29f7492008-07-22 14:09:06 -07001516static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1517{
1518 set_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1519}
1520
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001521/**
1522 * netif_stop_queue - stop transmitted packets
1523 * @dev: network device
1524 *
1525 * Stop upper layers calling the device hard_start_xmit routine.
1526 * Used for flow control when transmit resources are unavailable.
1527 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528static inline void netif_stop_queue(struct net_device *dev)
1529{
David S. Millere8a04642008-07-17 00:34:19 -07001530 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531}
1532
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001533static inline void netif_tx_stop_all_queues(struct net_device *dev)
1534{
1535 unsigned int i;
1536
1537 for (i = 0; i < dev->num_tx_queues; i++) {
1538 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1539 netif_tx_stop_queue(txq);
1540 }
1541}
1542
Dave Jonesd29f7492008-07-22 14:09:06 -07001543static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1544{
1545 return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state);
1546}
1547
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001548/**
1549 * netif_queue_stopped - test if transmit queue is flowblocked
1550 * @dev: network device
1551 *
1552 * Test if transmit queue on device is currently unable to send.
1553 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001554static inline int netif_queue_stopped(const struct net_device *dev)
1555{
David S. Millere8a04642008-07-17 00:34:19 -07001556 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557}
1558
David S. Millerc3f26a22008-07-31 16:58:50 -07001559static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
1560{
1561 return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
1562}
1563
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001564/**
1565 * netif_running - test if up
1566 * @dev: network device
1567 *
1568 * Test if the device has been brought up.
1569 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570static inline int netif_running(const struct net_device *dev)
1571{
1572 return test_bit(__LINK_STATE_START, &dev->state);
1573}
1574
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001575/*
1576 * Routines to manage the subqueues on a device. We only need start
1577 * stop, and a check if it's stopped. All other device management is
1578 * done at the overall netdevice level.
1579 * Also test the device if we're multiqueue.
1580 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001581
1582/**
1583 * netif_start_subqueue - allow sending packets on subqueue
1584 * @dev: network device
1585 * @queue_index: sub queue index
1586 *
1587 * Start individual transmit queue of a device with multiple transmit queues.
1588 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001589static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1590{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001591 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001592
1593 netif_tx_start_queue(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001594}
1595
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001596/**
1597 * netif_stop_subqueue - stop sending packets on subqueue
1598 * @dev: network device
1599 * @queue_index: sub queue index
1600 *
1601 * Stop individual transmit queue of a device with multiple transmit queues.
1602 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001603static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1604{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001605 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001606#ifdef CONFIG_NETPOLL_TRAP
1607 if (netpoll_trap())
1608 return;
1609#endif
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001610 netif_tx_stop_queue(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001611}
1612
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001613/**
1614 * netif_subqueue_stopped - test status of subqueue
1615 * @dev: network device
1616 * @queue_index: sub queue index
1617 *
1618 * Check individual transmit queue of a device with multiple transmit queues.
1619 */
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001620static inline int __netif_subqueue_stopped(const struct net_device *dev,
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001621 u16 queue_index)
1622{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001623 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001624
1625 return netif_tx_queue_stopped(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001626}
1627
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001628static inline int netif_subqueue_stopped(const struct net_device *dev,
1629 struct sk_buff *skb)
1630{
1631 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1632}
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001633
1634/**
1635 * netif_wake_subqueue - allow sending packets on subqueue
1636 * @dev: network device
1637 * @queue_index: sub queue index
1638 *
1639 * Resume individual transmit queue of a device with multiple transmit queues.
1640 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001641static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1642{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001643 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001644#ifdef CONFIG_NETPOLL_TRAP
1645 if (netpoll_trap())
1646 return;
1647#endif
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001648 if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001649 __netif_schedule(txq->qdisc);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001650}
1651
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001652/**
1653 * netif_is_multiqueue - test if device has multiple transmit queues
1654 * @dev: network device
1655 *
1656 * Check if device has multiple transmit queues
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001657 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001658static inline int netif_is_multiqueue(const struct net_device *dev)
1659{
David S. Miller09e83b52008-07-17 01:52:12 -07001660 return (dev->num_tx_queues > 1);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001661}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662
John Fastabendf0796d52010-07-01 13:21:57 +00001663extern void netif_set_real_num_tx_queues(struct net_device *dev,
1664 unsigned int txq);
1665
Linus Torvalds1da177e2005-04-16 15:20:36 -07001666/* Use this variant when it is known for sure that it
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07001667 * is executing from hardware interrupt context or with hardware interrupts
1668 * disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001669 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001670extern void dev_kfree_skb_irq(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671
1672/* Use this variant in places where it could be invoked
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07001673 * from either hardware interrupt or other context, with hardware interrupts
1674 * either disabled or enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 */
Denis Vlasenko56079432006-03-29 15:57:29 -08001676extern void dev_kfree_skb_any(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677
1678#define HAVE_NETIF_RX 1
1679extern int netif_rx(struct sk_buff *skb);
1680extern int netif_rx_ni(struct sk_buff *skb);
1681#define HAVE_NETIF_RECEIVE_SKB 1
1682extern int netif_receive_skb(struct sk_buff *skb);
Ben Hutchings5b252f02009-10-29 07:17:09 +00001683extern gro_result_t dev_gro_receive(struct napi_struct *napi,
Herbert Xu96e93ea2009-01-06 10:49:34 -08001684 struct sk_buff *skb);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07001685extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
1686extern gro_result_t napi_gro_receive(struct napi_struct *napi,
Herbert Xud565b0a2008-12-15 23:38:52 -08001687 struct sk_buff *skb);
Herbert Xu96e93ea2009-01-06 10:49:34 -08001688extern void napi_reuse_skb(struct napi_struct *napi,
1689 struct sk_buff *skb);
Herbert Xu76620aa2009-04-16 02:02:07 -07001690extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07001691extern gro_result_t napi_frags_finish(struct napi_struct *napi,
Ben Hutchings5b252f02009-10-29 07:17:09 +00001692 struct sk_buff *skb,
1693 gro_result_t ret);
Herbert Xu76620aa2009-04-16 02:02:07 -07001694extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07001695extern gro_result_t napi_gro_frags(struct napi_struct *napi);
Herbert Xu76620aa2009-04-16 02:02:07 -07001696
1697static inline void napi_free_frags(struct napi_struct *napi)
1698{
1699 kfree_skb(napi->skb);
1700 napi->skb = NULL;
1701}
1702
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001703extern int netdev_rx_handler_register(struct net_device *dev,
Jiri Pirko93e2c322010-06-10 03:34:59 +00001704 rx_handler_func_t *rx_handler,
1705 void *rx_handler_data);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001706extern void netdev_rx_handler_unregister(struct net_device *dev);
1707
Patrick McHardybc1d0412008-07-14 22:49:30 -07001708extern void netif_nit_deliver(struct sk_buff *skb);
Mitch Williamsc2373ee2005-11-09 10:34:45 -08001709extern int dev_valid_name(const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001710extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
1711extern int dev_ethtool(struct net *net, struct ifreq *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712extern unsigned dev_get_flags(const struct net_device *);
Patrick McHardybd380812010-02-26 06:34:53 +00001713extern int __dev_change_flags(struct net_device *, unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714extern int dev_change_flags(struct net_device *, unsigned);
Patrick McHardybd380812010-02-26 06:34:53 +00001715extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
Stephen Hemmingercf04a4c72008-09-30 02:22:14 -07001716extern int dev_change_name(struct net_device *, const char *);
Stephen Hemminger0b815a12008-09-22 21:28:11 -07001717extern int dev_set_alias(struct net_device *, const char *, size_t);
Eric W. Biedermance286d32007-09-12 13:53:49 +02001718extern int dev_change_net_namespace(struct net_device *,
1719 struct net *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720extern int dev_set_mtu(struct net_device *, int);
1721extern int dev_set_mac_address(struct net_device *,
1722 struct sockaddr *);
Herbert Xuf6a78bf2006-06-22 02:57:17 -07001723extern int dev_hard_start_xmit(struct sk_buff *skb,
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001724 struct net_device *dev,
1725 struct netdev_queue *txq);
Arnd Bergmann44540962009-11-26 06:07:08 +00001726extern int dev_forward_skb(struct net_device *dev,
1727 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001729extern int netdev_budget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001730
1731/* Called by rtnetlink.c:rtnl_unlock() */
1732extern void netdev_run_todo(void);
1733
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001734/**
1735 * dev_put - release reference to device
1736 * @dev: network device
1737 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001738 * Release reference to device to allow it to be freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001739 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740static inline void dev_put(struct net_device *dev)
1741{
1742 atomic_dec(&dev->refcnt);
1743}
1744
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001745/**
1746 * dev_hold - get reference to device
1747 * @dev: network device
1748 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07001749 * Hold reference to device to keep it from being freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001750 */
Stephen Hemminger15333062006-03-20 22:32:28 -08001751static inline void dev_hold(struct net_device *dev)
1752{
1753 atomic_inc(&dev->refcnt);
1754}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755
1756/* Carrier loss detection, dial on demand. The functions netif_carrier_on
1757 * and _off may be called from IRQ context, but it is caller
1758 * who is responsible for serialization of these calls.
Stefan Rompfb00055a2006-03-20 17:09:11 -08001759 *
1760 * The name carrier is inappropriate, these functions should really be
1761 * called netif_lowerlayer_*() because they represent the state of any
1762 * kind of lower layer not just hardware media.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 */
1764
1765extern void linkwatch_fire_event(struct net_device *dev);
Eric Dumazete014deb2009-11-17 05:59:21 +00001766extern void linkwatch_forget_dev(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001768/**
1769 * netif_carrier_ok - test if carrier present
1770 * @dev: network device
1771 *
1772 * Check if carrier is present on device
1773 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774static inline int netif_carrier_ok(const struct net_device *dev)
1775{
1776 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
1777}
1778
Eric Dumazet9d214932009-05-17 20:55:16 -07001779extern unsigned long dev_trans_start(struct net_device *dev);
1780
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781extern void __netdev_watchdog_up(struct net_device *dev);
1782
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001783extern void netif_carrier_on(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07001785extern void netif_carrier_off(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
Ian Campbell06c46482010-05-26 00:09:42 +00001787extern void netif_notify_peers(struct net_device *dev);
1788
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001789/**
1790 * netif_dormant_on - mark device as dormant.
1791 * @dev: network device
1792 *
1793 * Mark device as dormant (as per RFC2863).
1794 *
1795 * The dormant state indicates that the relevant interface is not
1796 * actually in a condition to pass packets (i.e., it is not 'up') but is
1797 * in a "pending" state, waiting for some external event. For "on-
1798 * demand" interfaces, this new state identifies the situation where the
1799 * interface is waiting for events to place it in the up state.
1800 *
1801 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001802static inline void netif_dormant_on(struct net_device *dev)
1803{
1804 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
1805 linkwatch_fire_event(dev);
1806}
1807
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001808/**
1809 * netif_dormant_off - set device as not dormant.
1810 * @dev: network device
1811 *
1812 * Device is not in dormant state.
1813 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001814static inline void netif_dormant_off(struct net_device *dev)
1815{
1816 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
1817 linkwatch_fire_event(dev);
1818}
1819
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001820/**
1821 * netif_dormant - test if carrier present
1822 * @dev: network device
1823 *
1824 * Check if carrier is present on device
1825 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08001826static inline int netif_dormant(const struct net_device *dev)
1827{
1828 return test_bit(__LINK_STATE_DORMANT, &dev->state);
1829}
1830
1831
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001832/**
1833 * netif_oper_up - test if device is operational
1834 * @dev: network device
1835 *
1836 * Check if carrier is operational
1837 */
Eric Dumazetd94d9fe2009-11-04 09:50:58 -08001838static inline int netif_oper_up(const struct net_device *dev)
1839{
Stefan Rompfb00055a2006-03-20 17:09:11 -08001840 return (dev->operstate == IF_OPER_UP ||
1841 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
1842}
1843
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001844/**
1845 * netif_device_present - is device available or removed
1846 * @dev: network device
1847 *
1848 * Check if device has not been removed from system.
1849 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850static inline int netif_device_present(struct net_device *dev)
1851{
1852 return test_bit(__LINK_STATE_PRESENT, &dev->state);
1853}
1854
Denis Vlasenko56079432006-03-29 15:57:29 -08001855extern void netif_device_detach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001856
Denis Vlasenko56079432006-03-29 15:57:29 -08001857extern void netif_device_attach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858
1859/*
1860 * Network interface message level settings
1861 */
1862#define HAVE_NETIF_MSG 1
1863
1864enum {
1865 NETIF_MSG_DRV = 0x0001,
1866 NETIF_MSG_PROBE = 0x0002,
1867 NETIF_MSG_LINK = 0x0004,
1868 NETIF_MSG_TIMER = 0x0008,
1869 NETIF_MSG_IFDOWN = 0x0010,
1870 NETIF_MSG_IFUP = 0x0020,
1871 NETIF_MSG_RX_ERR = 0x0040,
1872 NETIF_MSG_TX_ERR = 0x0080,
1873 NETIF_MSG_TX_QUEUED = 0x0100,
1874 NETIF_MSG_INTR = 0x0200,
1875 NETIF_MSG_TX_DONE = 0x0400,
1876 NETIF_MSG_RX_STATUS = 0x0800,
1877 NETIF_MSG_PKTDATA = 0x1000,
1878 NETIF_MSG_HW = 0x2000,
1879 NETIF_MSG_WOL = 0x4000,
1880};
1881
1882#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
1883#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
1884#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
1885#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
1886#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
1887#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
1888#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
1889#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
1890#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
1891#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
1892#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
1893#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
1894#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
1895#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
1896#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
1897
1898static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
1899{
1900 /* use default */
1901 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
1902 return default_msg_enable_bits;
1903 if (debug_value == 0) /* no output */
1904 return 0;
1905 /* set low N bits */
1906 return (1 << debug_value) - 1;
1907}
1908
David S. Millerc773e842008-07-08 23:13:53 -07001909static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
Herbert Xu932ff272006-06-09 12:20:56 -07001910{
David S. Millerc773e842008-07-08 23:13:53 -07001911 spin_lock(&txq->_xmit_lock);
1912 txq->xmit_lock_owner = cpu;
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07001913}
1914
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001915static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
1916{
1917 spin_lock_bh(&txq->_xmit_lock);
1918 txq->xmit_lock_owner = smp_processor_id();
1919}
1920
David S. Millerc773e842008-07-08 23:13:53 -07001921static inline int __netif_tx_trylock(struct netdev_queue *txq)
1922{
1923 int ok = spin_trylock(&txq->_xmit_lock);
1924 if (likely(ok))
1925 txq->xmit_lock_owner = smp_processor_id();
1926 return ok;
Herbert Xu932ff272006-06-09 12:20:56 -07001927}
1928
David S. Millerc773e842008-07-08 23:13:53 -07001929static inline void __netif_tx_unlock(struct netdev_queue *txq)
1930{
1931 txq->xmit_lock_owner = -1;
1932 spin_unlock(&txq->_xmit_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07001933}
1934
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001935static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
1936{
1937 txq->xmit_lock_owner = -1;
1938 spin_unlock_bh(&txq->_xmit_lock);
1939}
1940
Eric Dumazet08baf562009-05-25 22:58:01 -07001941static inline void txq_trans_update(struct netdev_queue *txq)
1942{
1943 if (txq->xmit_lock_owner != -1)
1944 txq->trans_start = jiffies;
1945}
1946
David S. Millerc3f26a22008-07-31 16:58:50 -07001947/**
1948 * netif_tx_lock - grab network device transmit lock
1949 * @dev: network device
David S. Millerc3f26a22008-07-31 16:58:50 -07001950 *
1951 * Get network device transmit lock
1952 */
1953static inline void netif_tx_lock(struct net_device *dev)
1954{
1955 unsigned int i;
1956 int cpu;
1957
1958 spin_lock(&dev->tx_global_lock);
1959 cpu = smp_processor_id();
1960 for (i = 0; i < dev->num_tx_queues; i++) {
1961 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1962
1963 /* We are the only thread of execution doing a
1964 * freeze, but we have to grab the _xmit_lock in
1965 * order to synchronize with threads which are in
1966 * the ->hard_start_xmit() handler and already
1967 * checked the frozen bit.
1968 */
1969 __netif_tx_lock(txq, cpu);
1970 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
1971 __netif_tx_unlock(txq);
1972 }
1973}
1974
1975static inline void netif_tx_lock_bh(struct net_device *dev)
1976{
1977 local_bh_disable();
1978 netif_tx_lock(dev);
1979}
1980
Herbert Xu932ff272006-06-09 12:20:56 -07001981static inline void netif_tx_unlock(struct net_device *dev)
1982{
David S. Millere8a04642008-07-17 00:34:19 -07001983 unsigned int i;
David S. Millerc773e842008-07-08 23:13:53 -07001984
David S. Millere8a04642008-07-17 00:34:19 -07001985 for (i = 0; i < dev->num_tx_queues; i++) {
1986 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millere8a04642008-07-17 00:34:19 -07001987
David S. Millerc3f26a22008-07-31 16:58:50 -07001988 /* No need to grab the _xmit_lock here. If the
1989 * queue is not stopped for another reason, we
1990 * force a schedule.
1991 */
1992 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001993 netif_schedule_queue(txq);
David S. Millerc3f26a22008-07-31 16:58:50 -07001994 }
1995 spin_unlock(&dev->tx_global_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07001996}
1997
1998static inline void netif_tx_unlock_bh(struct net_device *dev)
1999{
David S. Millere8a04642008-07-17 00:34:19 -07002000 netif_tx_unlock(dev);
2001 local_bh_enable();
Herbert Xu932ff272006-06-09 12:20:56 -07002002}
2003
David S. Millerc773e842008-07-08 23:13:53 -07002004#define HARD_TX_LOCK(dev, txq, cpu) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002005 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07002006 __netif_tx_lock(txq, cpu); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002007 } \
2008}
2009
David S. Millerc773e842008-07-08 23:13:53 -07002010#define HARD_TX_UNLOCK(dev, txq) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002011 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07002012 __netif_tx_unlock(txq); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002013 } \
2014}
2015
Linus Torvalds1da177e2005-04-16 15:20:36 -07002016static inline void netif_tx_disable(struct net_device *dev)
2017{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002018 unsigned int i;
David S. Millerc3f26a22008-07-31 16:58:50 -07002019 int cpu;
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002020
David S. Millerc3f26a22008-07-31 16:58:50 -07002021 local_bh_disable();
2022 cpu = smp_processor_id();
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002023 for (i = 0; i < dev->num_tx_queues; i++) {
2024 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millerc3f26a22008-07-31 16:58:50 -07002025
2026 __netif_tx_lock(txq, cpu);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002027 netif_tx_stop_queue(txq);
David S. Millerc3f26a22008-07-31 16:58:50 -07002028 __netif_tx_unlock(txq);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002029 }
David S. Millerc3f26a22008-07-31 16:58:50 -07002030 local_bh_enable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031}
2032
David S. Millere308a5d2008-07-15 00:13:44 -07002033static inline void netif_addr_lock(struct net_device *dev)
2034{
2035 spin_lock(&dev->addr_list_lock);
2036}
2037
2038static inline void netif_addr_lock_bh(struct net_device *dev)
2039{
2040 spin_lock_bh(&dev->addr_list_lock);
2041}
2042
2043static inline void netif_addr_unlock(struct net_device *dev)
2044{
2045 spin_unlock(&dev->addr_list_lock);
2046}
2047
2048static inline void netif_addr_unlock_bh(struct net_device *dev)
2049{
2050 spin_unlock_bh(&dev->addr_list_lock);
2051}
2052
Jiri Pirkof001fde2009-05-05 02:48:28 +00002053/*
Jiri Pirko31278e72009-06-17 01:12:19 +00002054 * dev_addrs walker. Should be used only for read access. Call with
Jiri Pirkof001fde2009-05-05 02:48:28 +00002055 * rcu_read_lock held.
2056 */
2057#define for_each_dev_addr(dev, ha) \
Jiri Pirko31278e72009-06-17 01:12:19 +00002058 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
Jiri Pirkof001fde2009-05-05 02:48:28 +00002059
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060/* These functions live elsewhere (drivers/net/net_init.c, but related) */
2061
2062extern void ether_setup(struct net_device *dev);
2063
2064/* Support for loadable net-drivers */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07002065extern struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
2066 void (*setup)(struct net_device *),
2067 unsigned int queue_count);
2068#define alloc_netdev(sizeof_priv, name, setup) \
2069 alloc_netdev_mq(sizeof_priv, name, setup, 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070extern int register_netdev(struct net_device *dev);
2071extern void unregister_netdev(struct net_device *dev);
Jiri Pirkof001fde2009-05-05 02:48:28 +00002072
Jiri Pirko22bedad2010-04-01 21:22:57 +00002073/* General hardware address lists handling functions */
2074extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2075 struct netdev_hw_addr_list *from_list,
2076 int addr_len, unsigned char addr_type);
2077extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2078 struct netdev_hw_addr_list *from_list,
2079 int addr_len, unsigned char addr_type);
2080extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2081 struct netdev_hw_addr_list *from_list,
2082 int addr_len);
2083extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2084 struct netdev_hw_addr_list *from_list,
2085 int addr_len);
2086extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2087extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2088
Jiri Pirkof001fde2009-05-05 02:48:28 +00002089/* Functions used for device addresses handling */
2090extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2091 unsigned char addr_type);
2092extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2093 unsigned char addr_type);
2094extern int dev_addr_add_multiple(struct net_device *to_dev,
2095 struct net_device *from_dev,
2096 unsigned char addr_type);
2097extern int dev_addr_del_multiple(struct net_device *to_dev,
2098 struct net_device *from_dev,
2099 unsigned char addr_type);
Jiri Pirkoa748ee22010-04-01 21:22:09 +00002100extern void dev_addr_flush(struct net_device *dev);
2101extern int dev_addr_init(struct net_device *dev);
2102
2103/* Functions used for unicast addresses handling */
2104extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2105extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2106extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2107extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2108extern void dev_uc_flush(struct net_device *dev);
2109extern void dev_uc_init(struct net_device *dev);
Jiri Pirkof001fde2009-05-05 02:48:28 +00002110
Jiri Pirko22bedad2010-04-01 21:22:57 +00002111/* Functions used for multicast addresses handling */
2112extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2113extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2114extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2115extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2116extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2117extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2118extern void dev_mc_flush(struct net_device *dev);
2119extern void dev_mc_init(struct net_device *dev);
Herbert Xufb286bb2005-11-10 13:01:24 -08002120
2121/* Functions used for secondary unicast and multicast support */
2122extern void dev_set_rx_mode(struct net_device *dev);
2123extern void __dev_set_rx_mode(struct net_device *dev);
Herbert Xufb286bb2005-11-10 13:01:24 -08002124extern int dev_set_promiscuity(struct net_device *dev, int inc);
2125extern int dev_set_allmulti(struct net_device *dev, int inc);
2126extern void netdev_state_change(struct net_device *dev);
Jiri Pirko3ca5b402010-03-10 10:29:35 +00002127extern int netdev_bonding_change(struct net_device *dev,
Moni Shoua75c78502009-09-15 02:37:40 -07002128 unsigned long event);
Herbert Xufb286bb2005-11-10 13:01:24 -08002129extern void netdev_features_change(struct net_device *dev);
2130/* Load a device via the kmod */
2131extern void dev_load(struct net *net, const char *name);
2132extern void dev_mcast_init(void);
Eric Dumazet28172732010-07-07 14:58:56 -07002133extern const struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2134 struct rtnl_link_stats64 *storage);
2135extern void dev_txq_stats_fold(const struct net_device *dev,
Ben Hutchings3cfde792010-07-09 09:11:52 +00002136 struct rtnl_link_stats64 *stats);
Herbert Xufb286bb2005-11-10 13:01:24 -08002137
2138extern int netdev_max_backlog;
Eric Dumazet3b098e22010-05-15 23:57:10 -07002139extern int netdev_tstamp_prequeue;
Herbert Xufb286bb2005-11-10 13:01:24 -08002140extern int weight_p;
2141extern int netdev_set_master(struct net_device *dev, struct net_device *master);
2142extern int skb_checksum_help(struct sk_buff *skb);
2143extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features);
2144#ifdef CONFIG_BUG
Linus Torvalds1da177e2005-04-16 15:20:36 -07002145extern void netdev_rx_csum_fault(struct net_device *dev);
2146#else
2147static inline void netdev_rx_csum_fault(struct net_device *dev)
2148{
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03002149}
2150#endif
2151/* rx skb timestamps */
2152extern void net_enable_timestamp(void);
2153extern void net_disable_timestamp(void);
2154
2155#ifdef CONFIG_PROC_FS
2156extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
Herbert Xu79671682006-06-22 02:40:14 -07002157extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2158extern void dev_seq_stop(struct seq_file *seq, void *v);
2159#endif
2160
Jay Vosburghb8a97872008-06-13 18:12:04 -07002161extern int netdev_class_create_file(struct class_attribute *class_attr);
2162extern void netdev_class_remove_file(struct class_attribute *class_attr);
2163
Stephen Hemmingercf04a4c72008-09-30 02:22:14 -07002164extern char *netdev_drivername(const struct net_device *dev, char *buffer, int len);
Arjan van de Ven6579e572008-07-21 13:31:48 -07002165
Linus Torvalds1da177e2005-04-16 15:20:36 -07002166extern void linkwatch_run_queue(void);
2167
Herbert Xub63365a2008-10-23 01:11:29 -07002168unsigned long netdev_increment_features(unsigned long all, unsigned long one,
2169 unsigned long mask);
2170unsigned long netdev_fix_features(unsigned long features, const char *name);
Herbert Xu7f353bf2007-08-10 15:47:58 -07002171
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08002172void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2173 struct net_device *dev);
2174
Herbert Xubcd76112006-06-30 13:36:35 -07002175static inline int net_gso_ok(int features, int gso_type)
2176{
2177 int feature = gso_type << NETIF_F_GSO_SHIFT;
2178 return (features & feature) == feature;
2179}
2180
Herbert Xu576a30e2006-06-27 13:22:38 -07002181static inline int skb_gso_ok(struct sk_buff *skb, int features)
2182{
Herbert Xu278b2512009-06-03 21:20:51 -07002183 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
David S. Millera5bd8a12009-06-09 00:17:27 -07002184 (!skb_has_frags(skb) || (features & NETIF_F_FRAGLIST));
Herbert Xu576a30e2006-06-27 13:22:38 -07002185}
2186
Herbert Xu79671682006-06-22 02:40:14 -07002187static inline int netif_needs_gso(struct net_device *dev, struct sk_buff *skb)
2188{
Herbert Xua430a432006-07-08 13:34:56 -07002189 return skb_is_gso(skb) &&
2190 (!skb_gso_ok(skb, dev->features) ||
Patrick McHardy84fa7932006-08-29 16:44:56 -07002191 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
Herbert Xu79671682006-06-22 02:40:14 -07002192}
2193
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -07002194static inline void netif_set_gso_max_size(struct net_device *dev,
2195 unsigned int size)
2196{
2197 dev->gso_max_size = size;
2198}
2199
Eric Dumazetacbbc072010-04-11 06:56:11 +00002200extern int __skb_bond_should_drop(struct sk_buff *skb,
2201 struct net_device *master);
Jiri Pirko5d4e0392009-05-28 01:05:00 +00002202
Eric Dumazet0641e4f2010-03-18 21:16:45 -07002203static inline int skb_bond_should_drop(struct sk_buff *skb,
2204 struct net_device *master)
David S. Miller7ea49ed2006-08-14 17:08:36 -07002205{
Eric Dumazetacbbc072010-04-11 06:56:11 +00002206 if (master)
2207 return __skb_bond_should_drop(skb, master);
David S. Miller7ea49ed2006-08-14 17:08:36 -07002208 return 0;
2209}
2210
Eric W. Biederman505d4f72008-11-07 22:54:20 -08002211extern struct pernet_operations __net_initdata loopback_net_ops;
Patrick McHardyb1b67dd2009-04-20 04:49:28 +00002212
2213static inline int dev_ethtool_get_settings(struct net_device *dev,
2214 struct ethtool_cmd *cmd)
2215{
2216 if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
2217 return -EOPNOTSUPP;
2218 return dev->ethtool_ops->get_settings(dev, cmd);
2219}
2220
2221static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
2222{
2223 if (!dev->ethtool_ops || !dev->ethtool_ops->get_rx_csum)
2224 return 0;
2225 return dev->ethtool_ops->get_rx_csum(dev);
2226}
2227
2228static inline u32 dev_ethtool_get_flags(struct net_device *dev)
2229{
2230 if (!dev->ethtool_ops || !dev->ethtool_ops->get_flags)
2231 return 0;
2232 return dev->ethtool_ops->get_flags(dev);
2233}
Joe Perches571ba422010-02-09 11:49:47 +00002234
2235/* Logging, debugging and troubleshooting/diagnostic helpers. */
2236
2237/* netdev_printk helpers, similar to dev_printk */
2238
2239static inline const char *netdev_name(const struct net_device *dev)
2240{
2241 if (dev->reg_state != NETREG_REGISTERED)
2242 return "(unregistered net_device)";
2243 return dev->name;
2244}
2245
Joe Perches256df2f2010-06-27 01:02:35 +00002246extern int netdev_printk(const char *level, const struct net_device *dev,
2247 const char *format, ...)
2248 __attribute__ ((format (printf, 3, 4)));
2249extern int netdev_emerg(const struct net_device *dev, const char *format, ...)
2250 __attribute__ ((format (printf, 2, 3)));
2251extern int netdev_alert(const struct net_device *dev, const char *format, ...)
2252 __attribute__ ((format (printf, 2, 3)));
2253extern int netdev_crit(const struct net_device *dev, const char *format, ...)
2254 __attribute__ ((format (printf, 2, 3)));
2255extern int netdev_err(const struct net_device *dev, const char *format, ...)
2256 __attribute__ ((format (printf, 2, 3)));
2257extern int netdev_warn(const struct net_device *dev, const char *format, ...)
2258 __attribute__ ((format (printf, 2, 3)));
2259extern int netdev_notice(const struct net_device *dev, const char *format, ...)
2260 __attribute__ ((format (printf, 2, 3)));
2261extern int netdev_info(const struct net_device *dev, const char *format, ...)
2262 __attribute__ ((format (printf, 2, 3)));
Joe Perches571ba422010-02-09 11:49:47 +00002263
2264#if defined(DEBUG)
2265#define netdev_dbg(__dev, format, args...) \
2266 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2267#elif defined(CONFIG_DYNAMIC_DEBUG)
2268#define netdev_dbg(__dev, format, args...) \
2269do { \
2270 dynamic_dev_dbg((__dev)->dev.parent, "%s: " format, \
2271 netdev_name(__dev), ##args); \
2272} while (0)
2273#else
2274#define netdev_dbg(__dev, format, args...) \
2275({ \
2276 if (0) \
2277 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2278 0; \
2279})
2280#endif
2281
2282#if defined(VERBOSE_DEBUG)
2283#define netdev_vdbg netdev_dbg
2284#else
2285
2286#define netdev_vdbg(dev, format, args...) \
2287({ \
2288 if (0) \
2289 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2290 0; \
2291})
2292#endif
2293
2294/*
2295 * netdev_WARN() acts like dev_printk(), but with the key difference
2296 * of using a WARN/WARN_ON to get the message out, including the
2297 * file/line information and a backtrace.
2298 */
2299#define netdev_WARN(dev, format, args...) \
2300 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2301
Joe Perchesb3d95c52010-02-09 11:49:49 +00002302/* netif printk helpers, similar to netdev_printk */
2303
2304#define netif_printk(priv, type, level, dev, fmt, args...) \
2305do { \
2306 if (netif_msg_##type(priv)) \
2307 netdev_printk(level, (dev), fmt, ##args); \
2308} while (0)
2309
Joe Perchesf45f4322010-06-27 01:02:36 +00002310#define netif_level(level, priv, type, dev, fmt, args...) \
2311do { \
2312 if (netif_msg_##type(priv)) \
2313 netdev_##level(dev, fmt, ##args); \
2314} while (0)
2315
Joe Perchesb3d95c52010-02-09 11:49:49 +00002316#define netif_emerg(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002317 netif_level(emerg, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002318#define netif_alert(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002319 netif_level(alert, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002320#define netif_crit(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002321 netif_level(crit, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002322#define netif_err(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002323 netif_level(err, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002324#define netif_warn(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002325 netif_level(warn, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002326#define netif_notice(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002327 netif_level(notice, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002328#define netif_info(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002329 netif_level(info, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002330
2331#if defined(DEBUG)
2332#define netif_dbg(priv, type, dev, format, args...) \
2333 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2334#elif defined(CONFIG_DYNAMIC_DEBUG)
2335#define netif_dbg(priv, type, netdev, format, args...) \
2336do { \
2337 if (netif_msg_##type(priv)) \
2338 dynamic_dev_dbg((netdev)->dev.parent, \
2339 "%s: " format, \
2340 netdev_name(netdev), ##args); \
2341} while (0)
2342#else
2343#define netif_dbg(priv, type, dev, format, args...) \
2344({ \
2345 if (0) \
2346 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2347 0; \
2348})
2349#endif
2350
2351#if defined(VERBOSE_DEBUG)
Ben Hutchingsbcfcc452010-07-02 07:08:44 +00002352#define netif_vdbg netif_dbg
Joe Perchesb3d95c52010-02-09 11:49:49 +00002353#else
2354#define netif_vdbg(priv, type, dev, format, args...) \
2355({ \
2356 if (0) \
Ben Hutchingsa4ed89c2010-05-18 06:56:32 +00002357 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
Joe Perchesb3d95c52010-02-09 11:49:49 +00002358 0; \
2359})
2360#endif
Joe Perches571ba422010-02-09 11:49:47 +00002361
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362#endif /* __KERNEL__ */
2363
Jiri Pirko385a1542009-05-27 15:48:07 -07002364#endif /* _LINUX_NETDEVICE_H */