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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__
Jean Pihete8db0be2011-08-25 15:35:03 +020034#include <linux/pm_qos.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>
Arun Sharma600634972011-07-26 16:09:06 -070037#include <linux/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <asm/cache.h>
39#include <asm/byteorder.h>
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <linux/device.h>
42#include <linux/percpu.h>
David S. Miller4d5b78c2009-05-06 16:52:51 -070043#include <linux/rculist.h>
Chris Leechdb217332006-06-17 21:24:58 -070044#include <linux/dmaengine.h>
Stephen Hemmingerbea33482007-10-03 16:41:36 -070045#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Patrick McHardyb1b67dd2009-04-20 04:49:28 +000047#include <linux/ethtool.h>
Daniel Lezcanoa050c332007-09-12 14:57:09 +020048#include <net/net_namespace.h>
Lennert Buytenhekcf85d082008-10-07 13:45:02 +000049#include <net/dsa.h>
Jeff Kirsher7a6b6f52008-11-25 01:02:08 -080050#ifdef CONFIG_DCB
Alexander Duyck2f90b862008-11-20 20:52:10 -080051#include <net/dcbnl.h>
52#endif
Neil Horman5bc14212011-11-22 05:10:51 +000053#include <net/netprio_cgroup.h>
Daniel Lezcanoa050c332007-09-12 14:57:09 +020054
Michał Mirosława59e2ec2011-11-15 15:29:55 +000055#include <linux/netdev_features.h>
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057struct vlan_group;
Jeff Moyer115c1d62005-06-22 22:05:31 -070058struct netpoll_info;
Richard Cochranc1f19b52010-07-17 08:49:36 +000059struct phy_device;
Johannes Berg704232c2007-04-23 12:20:05 -070060/* 802.11 specific */
61struct wireless_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 /* source back-compat hooks */
63#define SET_ETHTOOL_OPS(netdev,ops) \
64 ( (netdev)->ethtool_ops = (ops) )
65
Stefan Assmannc1f79422010-07-22 02:50:21 +000066/* hardware address assignment types */
67#define NET_ADDR_PERM 0 /* address is permanent (default) */
68#define NET_ADDR_RANDOM 1 /* address is generated randomly */
69#define NET_ADDR_STOLEN 2 /* address is stolen from other device */
70
Jarek Poplawski9a1654b2009-11-15 07:20:12 +000071/* Backlog congestion levels */
72#define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73#define NET_RX_DROP 1 /* packet dropped */
74
Patrick McHardy572a9d72009-11-10 06:14:14 +000075/*
76 * Transmit return codes: transmit return codes originate from three different
77 * namespaces:
78 *
79 * - qdisc return codes
80 * - driver transmit return codes
81 * - errno values
82 *
83 * Drivers are allowed to return any one of those in their hard_start_xmit()
84 * function. Real network devices commonly used with qdiscs should only return
85 * the driver transmit return codes though - when qdiscs are used, the actual
86 * transmission happens asynchronously, so the value is not propagated to
87 * higher layers. Virtual network devices transmit synchronously, in this case
88 * the driver transmit return codes are consumed by dev_queue_xmit(), all
89 * others are propagated to higher layers.
90 */
91
92/* qdisc ->enqueue() return codes. */
93#define NET_XMIT_SUCCESS 0x00
Jarek Poplawski9a1654b2009-11-15 07:20:12 +000094#define NET_XMIT_DROP 0x01 /* skb dropped */
95#define NET_XMIT_CN 0x02 /* congestion notification */
96#define NET_XMIT_POLICED 0x03 /* skb is shot by police */
97#define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Gerrit Renkerb9df3cb2006-11-14 11:21:36 -020099/* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
100 * indicates that the device will soon be dropping packets, or already drops
101 * some packets of the same priority; prompting us to send less aggressively. */
Patrick McHardy572a9d72009-11-10 06:14:14 +0000102#define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103#define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
104
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000105/* Driver transmit return codes */
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000106#define NETDEV_TX_MASK 0xf0
Patrick McHardy572a9d72009-11-10 06:14:14 +0000107
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000108enum netdev_tx {
Patrick McHardy572a9d72009-11-10 06:14:14 +0000109 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000110 NETDEV_TX_OK = 0x00, /* driver took care of packet */
111 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
112 NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000113};
114typedef enum netdev_tx netdev_tx_t;
115
Jarek Poplawski9a1654b2009-11-15 07:20:12 +0000116/*
117 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
118 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
119 */
120static inline bool dev_xmit_complete(int rc)
121{
122 /*
123 * Positive cases with an skb consumed by a driver:
124 * - successful transmission (rc == NETDEV_TX_OK)
125 * - error while transmitting (rc < 0)
126 * - error while queueing to a different device (rc & NET_XMIT_MASK)
127 */
128 if (likely(rc < NET_XMIT_MASK))
129 return true;
130
131 return false;
132}
133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134#endif
135
136#define MAX_ADDR_LEN 32 /* Largest hardware address length */
137
Vlad Dogaru23b41162011-02-26 22:39:12 +0000138/* Initial net device group. All devices belong to group 0 by default. */
139#define INIT_NETDEV_GROUP 0
140
Adrian Bunkc88e6f52008-06-27 19:54:54 -0700141#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142/*
143 * Compute the worst case header length according to the protocols
144 * used.
145 */
Graf Yangfe2918b2009-02-05 21:26:19 -0800146
Ben Hutchingsd11ead72011-11-25 14:40:26 +0000147#if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
David S. Miller8388e3d2008-05-12 20:17:33 -0700148# if defined(CONFIG_MAC80211_MESH)
149# define LL_MAX_HEADER 128
150# else
151# define LL_MAX_HEADER 96
152# endif
Ben Hutchingsd11ead72011-11-25 14:40:26 +0000153#elif IS_ENABLED(CONFIG_TR)
David S. Miller8388e3d2008-05-12 20:17:33 -0700154# define LL_MAX_HEADER 48
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155#else
David S. Miller8388e3d2008-05-12 20:17:33 -0700156# define LL_MAX_HEADER 32
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157#endif
158
Ben Hutchingsd11ead72011-11-25 14:40:26 +0000159#if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
160 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#define MAX_HEADER LL_MAX_HEADER
162#else
163#define MAX_HEADER (LL_MAX_HEADER + 48)
164#endif
165
166/*
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000167 * Old network device statistics. Fields are native words
168 * (unsigned long) so they can be read and written atomically.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 */
Graf Yangfe2918b2009-02-05 21:26:19 -0800170
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800171struct net_device_stats {
Ben Hutchings3cfde792010-07-09 09:11:52 +0000172 unsigned long rx_packets;
173 unsigned long tx_packets;
174 unsigned long rx_bytes;
175 unsigned long tx_bytes;
176 unsigned long rx_errors;
177 unsigned long tx_errors;
178 unsigned long rx_dropped;
179 unsigned long tx_dropped;
180 unsigned long multicast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 unsigned long collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 unsigned long rx_length_errors;
Ben Hutchings3cfde792010-07-09 09:11:52 +0000183 unsigned long rx_over_errors;
184 unsigned long rx_crc_errors;
185 unsigned long rx_frame_errors;
186 unsigned long rx_fifo_errors;
187 unsigned long rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 unsigned long tx_aborted_errors;
189 unsigned long tx_carrier_errors;
190 unsigned long tx_fifo_errors;
191 unsigned long tx_heartbeat_errors;
192 unsigned long tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 unsigned long rx_compressed;
194 unsigned long tx_compressed;
195};
196
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000197#endif /* __KERNEL__ */
198
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200/* Media selection options. */
201enum {
202 IF_PORT_UNKNOWN = 0,
203 IF_PORT_10BASE2,
204 IF_PORT_10BASET,
205 IF_PORT_AUI,
206 IF_PORT_100BASET,
207 IF_PORT_100BASETX,
208 IF_PORT_100BASEFX
209};
210
211#ifdef __KERNEL__
212
213#include <linux/cache.h>
214#include <linux/skbuff.h>
215
Eric Dumazetadc93002011-11-17 03:13:26 +0000216#ifdef CONFIG_RPS
217#include <linux/jump_label.h>
218extern struct jump_label_key rps_needed;
219#endif
220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221struct neighbour;
222struct neigh_parms;
223struct sk_buff;
224
Jiri Pirkof001fde2009-05-05 02:48:28 +0000225struct netdev_hw_addr {
226 struct list_head list;
227 unsigned char addr[MAX_ADDR_LEN];
228 unsigned char type;
Jiri Pirkoccffad252009-05-22 23:22:17 +0000229#define NETDEV_HW_ADDR_T_LAN 1
230#define NETDEV_HW_ADDR_T_SAN 2
231#define NETDEV_HW_ADDR_T_SLAVE 3
232#define NETDEV_HW_ADDR_T_UNICAST 4
Jiri Pirko22bedad32010-04-01 21:22:57 +0000233#define NETDEV_HW_ADDR_T_MULTICAST 5
Jiri Pirkoccffad252009-05-22 23:22:17 +0000234 bool synced;
Jiri Pirko22bedad32010-04-01 21:22:57 +0000235 bool global_use;
Eric Dumazet8f8f1032010-09-19 11:24:02 -0700236 int refcount;
Jiri Pirkof001fde2009-05-05 02:48:28 +0000237 struct rcu_head rcu_head;
238};
239
Jiri Pirko31278e72009-06-17 01:12:19 +0000240struct netdev_hw_addr_list {
241 struct list_head list;
242 int count;
243};
244
Jiri Pirko22bedad32010-04-01 21:22:57 +0000245#define netdev_hw_addr_list_count(l) ((l)->count)
246#define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
247#define netdev_hw_addr_list_for_each(ha, l) \
248 list_for_each_entry(ha, &(l)->list, list)
249
250#define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
251#define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
Jiri Pirko32e7bfc2010-01-25 13:36:10 -0800252#define netdev_for_each_uc_addr(ha, dev) \
Jiri Pirko22bedad32010-04-01 21:22:57 +0000253 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
Jiri Pirko32e7bfc2010-01-25 13:36:10 -0800254
Jiri Pirko22bedad32010-04-01 21:22:57 +0000255#define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
256#define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
Pavel Roskin18e225f2010-04-07 16:40:09 -0700257#define netdev_for_each_mc_addr(ha, dev) \
Jiri Pirko22bedad32010-04-01 21:22:57 +0000258 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
Jiri Pirko6683ece2010-02-04 10:22:25 -0800259
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800260struct hh_cache {
David S. Millerf6b72b622011-07-14 07:53:20 -0700261 u16 hh_len;
David S. Miller5c25f682011-07-13 00:51:10 -0700262 u16 __pad;
Stephen Hemminger3644f0c2006-12-07 15:08:17 -0800263 seqlock_t hh_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 /* cached hardware header; allow for machine alignment needs. */
266#define HH_DATA_MOD 16
267#define HH_DATA_OFF(__len) \
Jiri Benc5ba0eac2005-06-02 16:48:05 -0700268 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269#define HH_DATA_ALIGN(__len) \
270 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
271 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
272};
273
274/* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much.
275 * Alternative is:
276 * dev->hard_header_len ? (dev->hard_header_len +
277 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
278 *
279 * We could use other alignment values, but we must maintain the
280 * relationship HH alignment <= LL alignment.
281 */
282#define LL_RESERVED_SPACE(dev) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700283 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284#define LL_RESERVED_SPACE_EXTRA(dev,extra) \
Johannes Bergf5184d22008-05-12 20:48:31 -0700285 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700287struct header_ops {
288 int (*create) (struct sk_buff *skb, struct net_device *dev,
289 unsigned short type, const void *daddr,
290 const void *saddr, unsigned len);
291 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
292 int (*rebuild)(struct sk_buff *skb);
David S. Millere69dd332011-07-12 23:28:12 -0700293 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700294 void (*cache_update)(struct hh_cache *hh,
295 const struct net_device *dev,
296 const unsigned char *haddr);
297};
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299/* These flag bits are private to the generic network queueing
300 * layer, they may not be explicitly referenced by any other
301 * code.
302 */
303
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800304enum netdev_state_t {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 __LINK_STATE_START,
306 __LINK_STATE_PRESENT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 __LINK_STATE_NOCARRIER,
Stefan Rompfb00055a2006-03-20 17:09:11 -0800308 __LINK_STATE_LINKWATCH_PENDING,
309 __LINK_STATE_DORMANT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310};
311
312
313/*
314 * This structure holds at boot time configured netdevice settings. They
Graf Yangfe2918b2009-02-05 21:26:19 -0800315 * are then used in the device probing.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 */
317struct netdev_boot_setup {
318 char name[IFNAMSIZ];
319 struct ifmap map;
320};
321#define NETDEV_BOOT_SETUP_MAX 8
322
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300323extern int __init netdev_boot_setup(char *str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325/*
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700326 * Structure for NAPI scheduling similar to tasklet but with weighting
327 */
328struct napi_struct {
329 /* The poll_list must only be managed by the entity which
330 * changes the state of the NAPI_STATE_SCHED bit. This means
331 * whoever atomically sets that bit can add this napi_struct
332 * to the per-cpu poll_list, and whoever clears that bit
333 * can remove from the list right before clearing the bit.
334 */
335 struct list_head poll_list;
336
337 unsigned long state;
338 int weight;
339 int (*poll)(struct napi_struct *, int);
340#ifdef CONFIG_NETPOLL
341 spinlock_t poll_lock;
342 int poll_owner;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700343#endif
Herbert Xu4ae55442009-02-08 18:00:36 +0000344
345 unsigned int gro_count;
346
Herbert Xu5d38a072009-01-04 16:13:40 -0800347 struct net_device *dev;
Herbert Xud565b0a2008-12-15 23:38:52 -0800348 struct list_head dev_list;
349 struct sk_buff *gro_list;
Herbert Xu5d38a072009-01-04 16:13:40 -0800350 struct sk_buff *skb;
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700351};
352
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800353enum {
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700354 NAPI_STATE_SCHED, /* Poll is scheduled */
David S. Millera0a46192008-01-07 20:35:07 -0800355 NAPI_STATE_DISABLE, /* Disable pending */
Neil Horman7b363e42008-12-09 23:22:26 -0800356 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700357};
358
Ben Hutchings5b252f02009-10-29 07:17:09 +0000359enum gro_result {
Herbert Xud1c76af2009-03-16 10:50:02 -0700360 GRO_MERGED,
361 GRO_MERGED_FREE,
362 GRO_HELD,
363 GRO_NORMAL,
364 GRO_DROP,
365};
Ben Hutchings5b252f02009-10-29 07:17:09 +0000366typedef enum gro_result gro_result_t;
Herbert Xud1c76af2009-03-16 10:50:02 -0700367
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000368/*
369 * enum rx_handler_result - Possible return values for rx_handlers.
370 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
371 * further.
372 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
373 * case skb->dev was changed by rx_handler.
374 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
375 * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called.
376 *
377 * rx_handlers are functions called from inside __netif_receive_skb(), to do
378 * special processing of the skb, prior to delivery to protocol handlers.
379 *
380 * Currently, a net_device can only have a single rx_handler registered. Trying
381 * to register a second rx_handler will return -EBUSY.
382 *
383 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
384 * To unregister a rx_handler on a net_device, use
385 * netdev_rx_handler_unregister().
386 *
387 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
388 * do with the skb.
389 *
390 * If the rx_handler consumed to skb in some way, it should return
391 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
392 * the skb to be delivered in some other ways.
393 *
394 * If the rx_handler changed skb->dev, to divert the skb to another
395 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
396 * new device will be called if it exists.
397 *
398 * If the rx_handler consider the skb should be ignored, it should return
399 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
400 * are registred on exact device (ptype->dev == skb->dev).
401 *
402 * If the rx_handler didn't changed skb->dev, but want the skb to be normally
403 * delivered, it should return RX_HANDLER_PASS.
404 *
405 * A device without a registered rx_handler will behave as if rx_handler
406 * returned RX_HANDLER_PASS.
407 */
408
409enum rx_handler_result {
410 RX_HANDLER_CONSUMED,
411 RX_HANDLER_ANOTHER,
412 RX_HANDLER_EXACT,
413 RX_HANDLER_PASS,
414};
415typedef enum rx_handler_result rx_handler_result_t;
416typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000417
Harvey Harrisonb3c97522008-02-13 15:03:15 -0800418extern void __napi_schedule(struct napi_struct *n);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700419
David S. Millera0a46192008-01-07 20:35:07 -0800420static inline int napi_disable_pending(struct napi_struct *n)
421{
422 return test_bit(NAPI_STATE_DISABLE, &n->state);
423}
424
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700425/**
426 * napi_schedule_prep - check if napi can be scheduled
427 * @n: napi context
428 *
429 * Test if NAPI routine is already running, and if not mark
430 * it as running. This is used as a condition variable
David S. Millera0a46192008-01-07 20:35:07 -0800431 * insure only one NAPI poll instance runs. We also make
432 * sure there is no pending NAPI disable.
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700433 */
434static inline int napi_schedule_prep(struct napi_struct *n)
435{
David S. Millera0a46192008-01-07 20:35:07 -0800436 return !napi_disable_pending(n) &&
437 !test_and_set_bit(NAPI_STATE_SCHED, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700438}
439
440/**
441 * napi_schedule - schedule NAPI poll
442 * @n: napi context
443 *
444 * Schedule NAPI poll routine to be called if it is not already
445 * running.
446 */
447static inline void napi_schedule(struct napi_struct *n)
448{
449 if (napi_schedule_prep(n))
450 __napi_schedule(n);
451}
452
Roland Dreierbfe13f52007-10-09 15:47:37 -0700453/* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
454static inline int napi_reschedule(struct napi_struct *napi)
455{
456 if (napi_schedule_prep(napi)) {
457 __napi_schedule(napi);
458 return 1;
459 }
460 return 0;
461}
462
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700463/**
464 * napi_complete - NAPI processing complete
465 * @n: napi context
466 *
467 * Mark NAPI processing as complete.
468 */
Herbert Xud565b0a2008-12-15 23:38:52 -0800469extern void __napi_complete(struct napi_struct *n);
470extern void napi_complete(struct napi_struct *n);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700471
472/**
473 * napi_disable - prevent NAPI from scheduling
474 * @n: napi context
475 *
476 * Stop NAPI from being scheduled on this context.
477 * Waits till any outstanding processing completes.
478 */
479static inline void napi_disable(struct napi_struct *n)
480{
David S. Millera0a46192008-01-07 20:35:07 -0800481 set_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700482 while (test_and_set_bit(NAPI_STATE_SCHED, &n->state))
Benjamin Herrenschmidt43cc7382007-10-26 04:23:22 -0700483 msleep(1);
David S. Millera0a46192008-01-07 20:35:07 -0800484 clear_bit(NAPI_STATE_DISABLE, &n->state);
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700485}
486
487/**
488 * napi_enable - enable NAPI scheduling
489 * @n: napi context
490 *
491 * Resume NAPI from being scheduled on this context.
492 * Must be paired with napi_disable.
493 */
494static inline void napi_enable(struct napi_struct *n)
495{
496 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
497 smp_mb__before_clear_bit();
498 clear_bit(NAPI_STATE_SCHED, &n->state);
499}
500
Stephen Hemmingerc264c3d2007-10-17 13:26:41 -0700501#ifdef CONFIG_SMP
502/**
503 * napi_synchronize - wait until NAPI is not running
504 * @n: napi context
505 *
506 * Wait until NAPI is done being scheduled on this context.
507 * Waits till any outstanding processing completes but
508 * does not disable future activations.
509 */
510static inline void napi_synchronize(const struct napi_struct *n)
511{
512 while (test_bit(NAPI_STATE_SCHED, &n->state))
513 msleep(1);
514}
515#else
516# define napi_synchronize(n) barrier()
517#endif
518
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800519enum netdev_queue_state_t {
Tom Herbert734664982011-11-28 16:32:44 +0000520 __QUEUE_STATE_DRV_XOFF,
521 __QUEUE_STATE_STACK_XOFF,
David S. Millerc3f26a22008-07-31 16:58:50 -0700522 __QUEUE_STATE_FROZEN,
Tom Herbert734664982011-11-28 16:32:44 +0000523#define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \
524 (1 << __QUEUE_STATE_STACK_XOFF))
525#define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
526 (1 << __QUEUE_STATE_FROZEN))
David S. Miller79d16382008-07-08 23:14:46 -0700527};
Tom Herbert734664982011-11-28 16:32:44 +0000528/*
529 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
530 * netif_tx_* functions below are used to manipulate this flag. The
531 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
532 * queue independently. The netif_xmit_*stopped functions below are called
533 * to check if the queue has been stopped by the driver or stack (either
534 * of the XOFF bits are set in the state). Drivers should not need to call
535 * netif_xmit*stopped functions, they should only be using netif_tx_*.
536 */
David S. Miller79d16382008-07-08 23:14:46 -0700537
David S. Millerbb949fb2008-07-08 16:55:56 -0700538struct netdev_queue {
Eric Dumazet6a321cb2009-04-28 04:43:42 -0700539/*
540 * read mostly part
541 */
David S. Millerbb949fb2008-07-08 16:55:56 -0700542 struct net_device *dev;
David S. Millerb0e1e642008-07-08 17:42:10 -0700543 struct Qdisc *qdisc;
David S. Miller79d16382008-07-08 23:14:46 -0700544 unsigned long state;
David S. Millerb0e1e642008-07-08 17:42:10 -0700545 struct Qdisc *qdisc_sleeping;
david decotignyccf5ff62011-11-16 12:15:10 +0000546#ifdef CONFIG_SYSFS
Tom Herbert1d24eb42010-11-21 13:17:27 +0000547 struct kobject kobj;
548#endif
Eric Dumazetf2cd2d32010-11-29 08:14:37 +0000549#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
550 int numa_node;
551#endif
Eric Dumazet6a321cb2009-04-28 04:43:42 -0700552/*
553 * write mostly part
554 */
555 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
556 int xmit_lock_owner;
Eric Dumazet9d214932009-05-17 20:55:16 -0700557 /*
558 * please use this field instead of dev->trans_start
559 */
560 unsigned long trans_start;
david decotignyccf5ff62011-11-16 12:15:10 +0000561
562 /*
563 * Number of TX timeouts for this queue
564 * (/sys/class/net/DEV/Q/trans_timeout)
565 */
566 unsigned long trans_timeout;
David S. Millere8a04642008-07-17 00:34:19 -0700567} ____cacheline_aligned_in_smp;
David S. Millerbb949fb2008-07-08 16:55:56 -0700568
Eric Dumazetf2cd2d32010-11-29 08:14:37 +0000569static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
570{
571#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
572 return q->numa_node;
573#else
Changli Gaob236da62010-12-14 03:09:15 +0000574 return NUMA_NO_NODE;
Eric Dumazetf2cd2d32010-11-29 08:14:37 +0000575#endif
576}
577
578static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
579{
580#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
581 q->numa_node = node;
582#endif
583}
584
Eric Dumazetdf334542010-03-24 19:13:54 +0000585#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +0000586/*
587 * This structure holds an RPS map which can be of variable length. The
588 * map is an array of CPUs.
589 */
590struct rps_map {
591 unsigned int len;
592 struct rcu_head rcu;
593 u16 cpus[0];
594};
595#define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16)))
596
Tom Herbertfec5e652010-04-16 16:01:27 -0700597/*
Ben Hutchingsc4454772011-01-19 11:03:53 +0000598 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
599 * tail pointer for that CPU's input queue at the time of last enqueue, and
600 * a hardware filter index.
Tom Herbertfec5e652010-04-16 16:01:27 -0700601 */
602struct rps_dev_flow {
603 u16 cpu;
Ben Hutchingsc4454772011-01-19 11:03:53 +0000604 u16 filter;
Tom Herbertfec5e652010-04-16 16:01:27 -0700605 unsigned int last_qtail;
606};
Ben Hutchingsc4454772011-01-19 11:03:53 +0000607#define RPS_NO_FILTER 0xffff
Tom Herbertfec5e652010-04-16 16:01:27 -0700608
609/*
610 * The rps_dev_flow_table structure contains a table of flow mappings.
611 */
612struct rps_dev_flow_table {
613 unsigned int mask;
614 struct rcu_head rcu;
615 struct work_struct free_work;
616 struct rps_dev_flow flows[0];
617};
618#define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
619 (_num * sizeof(struct rps_dev_flow)))
620
621/*
622 * The rps_sock_flow_table contains mappings of flows to the last CPU
623 * on which they were processed by the application (set in recvmsg).
624 */
625struct rps_sock_flow_table {
626 unsigned int mask;
627 u16 ents[0];
628};
629#define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \
630 (_num * sizeof(u16)))
631
632#define RPS_NO_CPU 0xffff
633
634static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
635 u32 hash)
636{
637 if (table && hash) {
638 unsigned int cpu, index = hash & table->mask;
639
640 /* We only give a hint, preemption can change cpu under us */
641 cpu = raw_smp_processor_id();
642
643 if (table->ents[index] != cpu)
644 table->ents[index] = cpu;
645 }
646}
647
648static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table,
649 u32 hash)
650{
651 if (table && hash)
652 table->ents[hash & table->mask] = RPS_NO_CPU;
653}
654
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000655extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
Tom Herbertfec5e652010-04-16 16:01:27 -0700656
Ben Hutchingsc4454772011-01-19 11:03:53 +0000657#ifdef CONFIG_RFS_ACCEL
658extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index,
659 u32 flow_id, u16 filter_id);
660#endif
661
Tom Herbert0a9627f2010-03-16 08:03:29 +0000662/* This structure contains an instance of an RX queue. */
663struct netdev_rx_queue {
Eric Dumazet6e3f7fa2010-10-25 03:02:02 +0000664 struct rps_map __rcu *rps_map;
665 struct rps_dev_flow_table __rcu *rps_flow_table;
666 struct kobject kobj;
Tom Herbertfe822242010-11-09 10:47:38 +0000667 struct net_device *dev;
Tom Herbert0a9627f2010-03-16 08:03:29 +0000668} ____cacheline_aligned_in_smp;
Tom Herbertfec5e652010-04-16 16:01:27 -0700669#endif /* CONFIG_RPS */
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800670
Tom Herbertbf264142010-11-26 08:36:09 +0000671#ifdef CONFIG_XPS
672/*
673 * This structure holds an XPS map which can be of variable length. The
674 * map is an array of queues.
675 */
676struct xps_map {
677 unsigned int len;
678 unsigned int alloc_len;
679 struct rcu_head rcu;
680 u16 queues[0];
681};
682#define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16)))
683#define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \
684 / sizeof(u16))
685
686/*
687 * This structure holds all XPS maps for device. Maps are indexed by CPU.
688 */
689struct xps_dev_maps {
690 struct rcu_head rcu;
Eric Dumazeta4177862010-11-28 21:43:02 +0000691 struct xps_map __rcu *cpu_map[0];
Tom Herbertbf264142010-11-26 08:36:09 +0000692};
693#define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \
694 (nr_cpu_ids * sizeof(struct xps_map *)))
695#endif /* CONFIG_XPS */
696
John Fastabend4f57c082011-01-17 08:06:04 +0000697#define TC_MAX_QUEUE 16
698#define TC_BITMASK 15
699/* HW offloaded queuing disciplines txq count and offset maps */
700struct netdev_tc_txq {
701 u16 count;
702 u16 offset;
703};
704
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800705/*
706 * This structure defines the management hooks for network devices.
Stephen Hemminger00829822008-11-20 20:14:53 -0800707 * The following hooks can be defined; unless noted otherwise, they are
708 * optional and can be filled with a null pointer.
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800709 *
710 * int (*ndo_init)(struct net_device *dev);
711 * This function is called once when network device is registered.
712 * The network device can use this to any late stage initializaton
713 * or semantic validattion. It can fail with an error code which will
714 * be propogated back to register_netdev
715 *
716 * void (*ndo_uninit)(struct net_device *dev);
717 * This function is called when device is unregistered or when registration
718 * fails. It is not called if init fails.
719 *
720 * int (*ndo_open)(struct net_device *dev);
721 * This function is called when network device transistions to the up
722 * state.
723 *
724 * int (*ndo_stop)(struct net_device *dev);
725 * This function is called when network device transistions to the down
726 * state.
727 *
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000728 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
729 * struct net_device *dev);
Stephen Hemminger00829822008-11-20 20:14:53 -0800730 * Called when a packet needs to be transmitted.
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000731 * Must return NETDEV_TX_OK , NETDEV_TX_BUSY.
732 * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX)
Stephen Hemminger00829822008-11-20 20:14:53 -0800733 * Required can not be NULL.
734 *
735 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb);
736 * Called to decide which queue to when device supports multiple
737 * transmit queues.
738 *
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800739 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
740 * This function is called to allow device receiver to make
741 * changes to configuration when multicast or promiscious is enabled.
742 *
743 * void (*ndo_set_rx_mode)(struct net_device *dev);
744 * This function is called device changes address list filtering.
Jiri Pirko01789342011-08-16 06:29:00 +0000745 * If driver handles unicast address filtering, it should set
746 * IFF_UNICAST_FLT to its priv_flags.
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800747 *
748 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
749 * This function is called when the Media Access Control address
Mike Rapoport37b607c2009-04-27 05:45:54 -0700750 * needs to be changed. If this interface is not defined, the
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800751 * mac address can not be changed.
752 *
753 * int (*ndo_validate_addr)(struct net_device *dev);
754 * Test if Media Access Control address is valid for the device.
755 *
756 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
757 * Called when a user request an ioctl which can't be handled by
758 * the generic interface code. If not defined ioctl's return
759 * not supported error code.
760 *
761 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
762 * Used to set network devices bus interface parameters. This interface
763 * is retained for legacy reason, new devices should use the bus
764 * interface (PCI) for low level management.
765 *
766 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
767 * Called when a user wants to change the Maximum Transfer Unit
768 * of a device. If not defined, any request to change MTU will
769 * will return an error.
770 *
Stephen Hemminger00829822008-11-20 20:14:53 -0800771 * void (*ndo_tx_timeout)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800772 * Callback uses when the transmitter has not made any progress
773 * for dev->watchdog ticks.
774 *
Ben Hutchings3cfde792010-07-09 09:11:52 +0000775 * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
Eric Dumazet28172732010-07-07 14:58:56 -0700776 * struct rtnl_link_stats64 *storage);
Wolfram Sangd308e382009-10-07 13:53:11 -0700777 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800778 * Called when a user wants to get the network device usage
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000779 * statistics. Drivers must do one of the following:
Ben Hutchings3cfde792010-07-09 09:11:52 +0000780 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
781 * rtnl_link_stats64 structure passed by the caller.
Ben Hutchings82695d92010-06-15 15:08:48 -0700782 * 2. Define @ndo_get_stats to update a net_device_stats structure
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +0000783 * (which should normally be dev->stats) and return a pointer to
784 * it. The structure may be changed asynchronously only if each
785 * field is written atomically.
786 * 3. Update dev->stats asynchronously and atomically, and define
787 * neither operation.
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800788 *
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800789 * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid);
790 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
791 * this function is called when a VLAN id is registered.
792 *
793 * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid);
794 * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER)
795 * this function is called when a VLAN id is unregistered.
796 *
797 * void (*ndo_poll_controller)(struct net_device *dev);
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000798 *
799 * SR-IOV management functions.
800 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
801 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos);
802 * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate);
Greg Rose5f8444a2011-10-08 03:05:24 +0000803 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000804 * int (*ndo_get_vf_config)(struct net_device *dev,
805 * int vf, struct ifla_vf_info *ivf);
Scott Feldman57b61082010-05-17 22:49:55 -0700806 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
807 * struct nlattr *port[]);
808 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
John Fastabend4f57c082011-01-17 08:06:04 +0000809 * int (*ndo_setup_tc)(struct net_device *dev, u8 tc)
810 * Called to setup 'tc' number of traffic classes in the net device. This
811 * is always called from the stack with the rtnl lock held and netif tx
812 * queues stopped. This allows the netdevice to perform queue management
813 * safely.
Ben Hutchingsc4454772011-01-19 11:03:53 +0000814 *
Yi Zoue9bce842011-03-09 08:48:03 +0000815 * Fiber Channel over Ethernet (FCoE) offload functions.
816 * int (*ndo_fcoe_enable)(struct net_device *dev);
817 * Called when the FCoE protocol stack wants to start using LLD for FCoE
818 * so the underlying device can perform whatever needed configuration or
819 * initialization to support acceleration of FCoE traffic.
820 *
821 * int (*ndo_fcoe_disable)(struct net_device *dev);
822 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
823 * so the underlying device can perform whatever needed clean-ups to
824 * stop supporting acceleration of FCoE traffic.
825 *
826 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
827 * struct scatterlist *sgl, unsigned int sgc);
828 * Called when the FCoE Initiator wants to initialize an I/O that
829 * is a possible candidate for Direct Data Placement (DDP). The LLD can
830 * perform necessary setup and returns 1 to indicate the device is set up
831 * successfully to perform DDP on this I/O, otherwise this returns 0.
832 *
833 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
834 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
835 * indicated by the FC exchange id 'xid', so the underlying device can
836 * clean up and reuse resources for later DDP requests.
837 *
838 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
839 * struct scatterlist *sgl, unsigned int sgc);
840 * Called when the FCoE Target wants to initialize an I/O that
841 * is a possible candidate for Direct Data Placement (DDP). The LLD can
842 * perform necessary setup and returns 1 to indicate the device is set up
843 * successfully to perform DDP on this I/O, otherwise this returns 0.
844 *
845 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
846 * Called when the underlying device wants to override default World Wide
847 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
848 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
849 * protocol stack to use.
850 *
Ben Hutchingsc4454772011-01-19 11:03:53 +0000851 * RFS acceleration.
852 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
853 * u16 rxq_index, u32 flow_id);
854 * Set hardware filter for RFS. rxq_index is the target queue index;
855 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
856 * Return the filter ID on success, or a negative error code.
Jiri Pirkofbaec0e2011-02-13 10:15:37 +0000857 *
858 * Slave management functions (for bridge, bonding, etc). User should
859 * call netdev_set_master() to set dev->master properly.
860 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
861 * Called to make another netdev an underling.
862 *
863 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
864 * Called to release previously enslaved netdev.
Michał Mirosław5455c692011-02-15 16:59:17 +0000865 *
866 * Feature/offload setting functions.
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000867 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
868 * netdev_features_t features);
Michał Mirosław5455c692011-02-15 16:59:17 +0000869 * Adjusts the requested feature flags according to device-specific
870 * constraints, and returns the resulting flags. Must not modify
871 * the device state.
872 *
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000873 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
Michał Mirosław5455c692011-02-15 16:59:17 +0000874 * Called to update device configuration to new features. Passed
875 * feature set might be less than what was returned by ndo_fix_features()).
876 * Must return >0 or -errno if it changed dev->features itself.
877 *
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800878 */
879struct net_device_ops {
880 int (*ndo_init)(struct net_device *dev);
881 void (*ndo_uninit)(struct net_device *dev);
882 int (*ndo_open)(struct net_device *dev);
883 int (*ndo_stop)(struct net_device *dev);
Stephen Hemmingerdc1f8bf2009-08-31 19:50:40 +0000884 netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb,
Stephen Hemminger00829822008-11-20 20:14:53 -0800885 struct net_device *dev);
886 u16 (*ndo_select_queue)(struct net_device *dev,
887 struct sk_buff *skb);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800888 void (*ndo_change_rx_flags)(struct net_device *dev,
889 int flags);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800890 void (*ndo_set_rx_mode)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800891 int (*ndo_set_mac_address)(struct net_device *dev,
892 void *addr);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800893 int (*ndo_validate_addr)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800894 int (*ndo_do_ioctl)(struct net_device *dev,
895 struct ifreq *ifr, int cmd);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800896 int (*ndo_set_config)(struct net_device *dev,
897 struct ifmap *map);
Stephen Hemminger00829822008-11-20 20:14:53 -0800898 int (*ndo_change_mtu)(struct net_device *dev,
899 int new_mtu);
900 int (*ndo_neigh_setup)(struct net_device *dev,
901 struct neigh_parms *);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800902 void (*ndo_tx_timeout) (struct net_device *dev);
903
Eric Dumazet28172732010-07-07 14:58:56 -0700904 struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev,
905 struct rtnl_link_stats64 *storage);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800906 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
907
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800908 void (*ndo_vlan_rx_add_vid)(struct net_device *dev,
909 unsigned short vid);
910 void (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
911 unsigned short vid);
912#ifdef CONFIG_NET_POLL_CONTROLLER
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800913 void (*ndo_poll_controller)(struct net_device *dev);
Herbert Xu4247e162010-06-10 16:12:47 +0000914 int (*ndo_netpoll_setup)(struct net_device *dev,
915 struct netpoll_info *info);
WANG Cong0e34e932010-05-06 00:47:21 -0700916 void (*ndo_netpoll_cleanup)(struct net_device *dev);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800917#endif
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000918 int (*ndo_set_vf_mac)(struct net_device *dev,
919 int queue, u8 *mac);
920 int (*ndo_set_vf_vlan)(struct net_device *dev,
921 int queue, u16 vlan, u8 qos);
922 int (*ndo_set_vf_tx_rate)(struct net_device *dev,
923 int vf, int rate);
Greg Rose5f8444a2011-10-08 03:05:24 +0000924 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
925 int vf, bool setting);
Williams, Mitch A95c26df2010-02-10 01:43:46 +0000926 int (*ndo_get_vf_config)(struct net_device *dev,
927 int vf,
928 struct ifla_vf_info *ivf);
Scott Feldman57b61082010-05-17 22:49:55 -0700929 int (*ndo_set_vf_port)(struct net_device *dev,
930 int vf,
931 struct nlattr *port[]);
932 int (*ndo_get_vf_port)(struct net_device *dev,
933 int vf, struct sk_buff *skb);
John Fastabend4f57c082011-01-17 08:06:04 +0000934 int (*ndo_setup_tc)(struct net_device *dev, u8 tc);
Ben Hutchingsd11ead72011-11-25 14:40:26 +0000935#if IS_ENABLED(CONFIG_FCOE)
Yi Zoucb454392009-08-31 12:31:36 +0000936 int (*ndo_fcoe_enable)(struct net_device *dev);
937 int (*ndo_fcoe_disable)(struct net_device *dev);
Yi Zou4d288d52009-02-27 14:06:59 -0800938 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
939 u16 xid,
940 struct scatterlist *sgl,
941 unsigned int sgc);
942 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
943 u16 xid);
Yi Zou6247e082011-02-01 07:22:06 +0000944 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
945 u16 xid,
946 struct scatterlist *sgl,
947 unsigned int sgc);
Bhanu Prakash Gollapudi3c9c36bc2011-08-26 09:45:41 +0000948#endif
949
Ben Hutchingsd11ead72011-11-25 14:40:26 +0000950#if IS_ENABLED(CONFIG_LIBFCOE)
Yi Zoudf5c7942009-10-28 18:24:35 +0000951#define NETDEV_FCOE_WWNN 0
952#define NETDEV_FCOE_WWPN 1
953 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
954 u64 *wwn, int type);
Yi Zou4d288d52009-02-27 14:06:59 -0800955#endif
Bhanu Prakash Gollapudi3c9c36bc2011-08-26 09:45:41 +0000956
Ben Hutchingsc4454772011-01-19 11:03:53 +0000957#ifdef CONFIG_RFS_ACCEL
958 int (*ndo_rx_flow_steer)(struct net_device *dev,
959 const struct sk_buff *skb,
960 u16 rxq_index,
961 u32 flow_id);
962#endif
Jiri Pirkofbaec0e2011-02-13 10:15:37 +0000963 int (*ndo_add_slave)(struct net_device *dev,
964 struct net_device *slave_dev);
965 int (*ndo_del_slave)(struct net_device *dev,
966 struct net_device *slave_dev);
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000967 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
968 netdev_features_t features);
Michał Mirosław5455c692011-02-15 16:59:17 +0000969 int (*ndo_set_features)(struct net_device *dev,
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000970 netdev_features_t features);
Stephen Hemmingerd3147742008-11-19 21:32:24 -0800971};
972
Stephen Hemmingerbea33482007-10-03 16:41:36 -0700973/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 * The DEVICE structure.
975 * Actually, this whole structure is a big mistake. It mixes I/O
976 * data with strictly "high-level" data, and it has to know about
977 * almost every data structure used in the INET module.
978 *
979 * FIXME: cleanup struct net_device such that network protocol info
980 * moves out.
981 */
982
Eric Dumazetd94d9fe2009-11-04 09:50:58 -0800983struct net_device {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984
985 /*
986 * This is the first field of the "visible" part of this structure
987 * (i.e. as seen by users in the "Space.c" file). It is the name
Justin P. Mattock724df612010-05-26 09:22:40 -0700988 * of the interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 */
990 char name[IFNAMSIZ];
Mark Grossed771342010-05-06 01:59:26 +0200991
Jean Pihetcc749982011-08-25 15:35:12 +0200992 struct pm_qos_request pm_qos_req;
Mark Grossed771342010-05-06 01:59:26 +0200993
Eric Dumazet9356b8f2005-09-27 15:23:16 -0700994 /* device name hash chain */
995 struct hlist_node name_hlist;
Stephen Hemminger0b815a12008-09-22 21:28:11 -0700996 /* snmp alias */
997 char *ifalias;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 /*
1000 * I/O specific fields
1001 * FIXME: Merge these and struct ifmap into one
1002 */
1003 unsigned long mem_end; /* shared mem end */
1004 unsigned long mem_start; /* shared mem start */
1005 unsigned long base_addr; /* device I/O address */
1006 unsigned int irq; /* device IRQ number */
1007
1008 /*
1009 * Some hardware also needs these fields, but they are not
1010 * part of the usual set specified in Space.c.
1011 */
1012
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 unsigned long state;
1014
Pavel Emelianov7562f872007-05-03 15:13:45 -07001015 struct list_head dev_list;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001016 struct list_head napi_list;
Eric Dumazet44a08732009-10-27 07:03:04 +00001017 struct list_head unreg_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001018
Michał Mirosław5455c692011-02-15 16:59:17 +00001019 /* currently active device features */
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001020 netdev_features_t features;
Michał Mirosław5455c692011-02-15 16:59:17 +00001021 /* user-changeable features */
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001022 netdev_features_t hw_features;
Michał Mirosław5455c692011-02-15 16:59:17 +00001023 /* user-requested features */
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001024 netdev_features_t wanted_features;
Michał Mirosław1aac6262011-04-12 04:07:39 +00001025 /* mask of features inheritable by VLAN devices */
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001026 netdev_features_t vlan_features;
Michał Mirosław04ed3e72011-01-24 15:32:47 -08001027
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 /* Interface index. Unique device identifier */
1029 int ifindex;
1030 int iflink;
1031
Rusty Russellc45d2862007-03-28 14:29:08 -07001032 struct net_device_stats stats;
Eric Dumazetcaf586e2010-09-30 21:06:55 +00001033 atomic_long_t rx_dropped; /* dropped packets by core network
1034 * Do not use this in drivers.
1035 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036
Johannes Bergb86e0282007-04-26 20:48:23 -07001037#ifdef CONFIG_WIRELESS_EXT
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 /* List of functions to handle Wireless Extensions (instead of ioctl).
1039 * See <net/iw_handler.h> for details. Jean II */
1040 const struct iw_handler_def * wireless_handlers;
1041 /* Instance data managed by the core of Wireless Extensions. */
1042 struct iw_public_data * wireless_data;
Johannes Bergb86e0282007-04-26 20:48:23 -07001043#endif
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001044 /* Management operations */
1045 const struct net_device_ops *netdev_ops;
Stephen Hemminger76fd8592006-09-08 11:16:13 -07001046 const struct ethtool_ops *ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001048 /* Hardware header description */
1049 const struct header_ops *header_ops;
1050
Stefan Rompfb00055a2006-03-20 17:09:11 -08001051 unsigned int flags; /* interface flags (a la BSD) */
Joe Perchesbdc220d2011-05-09 17:42:46 +00001052 unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 unsigned short gflags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 unsigned short padded; /* How much padding added by alloc_netdev() */
1055
Stefan Rompfb00055a2006-03-20 17:09:11 -08001056 unsigned char operstate; /* RFC2863 operstate */
1057 unsigned char link_mode; /* mapping policy to operstate */
1058
Joe Perchesbdc220d2011-05-09 17:42:46 +00001059 unsigned char if_port; /* Selectable AUI, TP,..*/
1060 unsigned char dma; /* DMA channel */
1061
David S. Millercd7b5392010-05-02 22:27:59 -07001062 unsigned int mtu; /* interface MTU value */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 unsigned short type; /* interface hardware type */
1064 unsigned short hard_header_len; /* hardware hdr length */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065
Johannes Bergf5184d22008-05-12 20:48:31 -07001066 /* extra head- and tailroom the hardware may need, but not in all cases
1067 * can this be guaranteed, especially tailroom. Some cases also use
1068 * LL_MAX_HEADER instead to allocate the skb.
1069 */
1070 unsigned short needed_headroom;
1071 unsigned short needed_tailroom;
1072
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 /* Interface address info. */
Jon Wetzela6f9a702005-08-20 17:15:54 -07001074 unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */
Stefan Assmannc1f79422010-07-22 02:50:21 +00001075 unsigned char addr_assign_type; /* hw address assignment type */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076 unsigned char addr_len; /* hardware address length */
1077 unsigned short dev_id; /* for shared network cards */
1078
Jiri Pirkoccffad252009-05-22 23:22:17 +00001079 spinlock_t addr_list_lock;
Jiri Pirko22bedad32010-04-01 21:22:57 +00001080 struct netdev_hw_addr_list uc; /* Unicast mac addresses */
1081 struct netdev_hw_addr_list mc; /* Multicast mac addresses */
Joe Perches2d348d12011-07-25 16:17:35 -07001082 bool uc_promisc;
Wang Chen9d45abe2008-06-17 21:12:48 -07001083 unsigned int promiscuity;
1084 unsigned int allmulti;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086
1087 /* Protocol specific pointers */
Jesse Gross65ac6a52010-10-20 13:56:05 +00001088
Ben Hutchingsd11ead72011-11-25 14:40:26 +00001089#if IS_ENABLED(CONFIG_VLAN_8021Q)
Eric Dumazetb616b092010-10-24 21:31:58 +00001090 struct vlan_group __rcu *vlgrp; /* VLAN group */
Jesse Gross65ac6a52010-10-20 13:56:05 +00001091#endif
Ben Hutchings34a430d2011-11-25 14:38:38 +00001092#if IS_ENABLED(CONFIG_NET_DSA)
Ben Hutchingscf50dcc2011-11-25 14:32:52 +00001093 struct dsa_switch_tree *dsa_ptr; /* dsa specific data */
Lennert Buytenhek91da11f2008-10-07 13:44:02 +00001094#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 void *atalk_ptr; /* AppleTalk link */
Eric Dumazet95ae6b22010-09-15 04:04:31 +00001096 struct in_device __rcu *ip_ptr; /* IPv4 specific data */
Eric Dumazetfc766e4c2010-10-29 03:09:24 +00001097 struct dn_dev __rcu *dn_ptr; /* DECnet specific data */
Eric Dumazet198caec2010-10-24 21:32:05 +00001098 struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 void *ec_ptr; /* Econet specific data */
1100 void *ax25_ptr; /* AX.25 specific data */
Johannes Berg704232c2007-04-23 12:20:05 -07001101 struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data,
1102 assign before registering */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001104/*
Eric Dumazetcd135392010-09-16 02:58:13 +00001105 * Cache lines mostly used on receive path (including eth_type_trans())
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001106 */
Eric Dumazet4dc89132010-08-31 07:40:16 +00001107 unsigned long last_rx; /* Time of last Rx
1108 * This should not be set in
1109 * drivers, unless really needed,
1110 * because network stack (bonding)
1111 * use it if/when necessary, to
1112 * avoid dirtying this cache line.
1113 */
1114
Eric Dumazetcd135392010-09-16 02:58:13 +00001115 struct net_device *master; /* Pointer to master device of a group,
1116 * which this device is member of.
1117 */
1118
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001119 /* Interface address info used in eth_type_trans() */
Jiri Pirkof001fde2009-05-05 02:48:28 +00001120 unsigned char *dev_addr; /* hw address, (before bcast
1121 because most packets are
1122 unicast) */
1123
Jiri Pirko31278e72009-06-17 01:12:19 +00001124 struct netdev_hw_addr_list dev_addrs; /* list of device
1125 hw addresses */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001127 unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
1128
david decotignyccf5ff62011-11-16 12:15:10 +00001129#ifdef CONFIG_SYSFS
Tom Herbert0a9627f2010-03-16 08:03:29 +00001130 struct kset *queues_kset;
david decotignyccf5ff62011-11-16 12:15:10 +00001131#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +00001132
david decotignyccf5ff62011-11-16 12:15:10 +00001133#ifdef CONFIG_RPS
Tom Herbert0a9627f2010-03-16 08:03:29 +00001134 struct netdev_rx_queue *_rx;
1135
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001136 /* Number of RX queues allocated at register_netdev() time */
Tom Herbert0a9627f2010-03-16 08:03:29 +00001137 unsigned int num_rx_queues;
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001138
1139 /* Number of RX queues currently active in device */
1140 unsigned int real_num_rx_queues;
Ben Hutchingsc4454772011-01-19 11:03:53 +00001141
1142#ifdef CONFIG_RFS_ACCEL
1143 /* CPU reverse-mapping for RX completion interrupts, indexed
1144 * by RX queue number. Assigned by driver. This must only be
1145 * set if the ndo_rx_flow_steer operation is defined. */
1146 struct cpu_rmap *rx_cpu_rmap;
1147#endif
Eric Dumazetdf334542010-03-24 19:13:54 +00001148#endif
Tom Herbert0a9627f2010-03-16 08:03:29 +00001149
stephen hemminger61391cd2010-11-15 06:38:12 +00001150 rx_handler_func_t __rcu *rx_handler;
1151 void __rcu *rx_handler_data;
David S. Millere8a04642008-07-17 00:34:19 -07001152
Eric Dumazet24824a02010-10-02 06:11:55 +00001153 struct netdev_queue __rcu *ingress_queue;
Eric Dumazetcd135392010-09-16 02:58:13 +00001154
1155/*
1156 * Cache lines mostly used on transmit path
1157 */
David S. Millere8a04642008-07-17 00:34:19 -07001158 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001159
1160 /* Number of TX queues allocated at alloc_netdev_mq() time */
David S. Millere8a04642008-07-17 00:34:19 -07001161 unsigned int num_tx_queues;
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001162
1163 /* Number of TX queues currently active in device */
1164 unsigned int real_num_tx_queues;
1165
Patrick McHardyaf356af2009-09-04 06:41:18 +00001166 /* root qdisc from userspace point of view */
1167 struct Qdisc *qdisc;
1168
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 unsigned long tx_queue_len; /* Max frames per queue allowed */
David S. Millerc3f26a22008-07-31 16:58:50 -07001170 spinlock_t tx_global_lock;
Eric Dumazetcd135392010-09-16 02:58:13 +00001171
Tom Herbertbf264142010-11-26 08:36:09 +00001172#ifdef CONFIG_XPS
Eric Dumazeta4177862010-11-28 21:43:02 +00001173 struct xps_dev_maps __rcu *xps_maps;
Tom Herbertbf264142010-11-26 08:36:09 +00001174#endif
Tom Herbert1d24eb42010-11-21 13:17:27 +00001175
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001176 /* These may be needed for future network-power-down code. */
Eric Dumazet9d214932009-05-17 20:55:16 -07001177
1178 /*
1179 * trans_start here is expensive for high speed devices on SMP,
1180 * please use netdev_queue->trans_start instead.
1181 */
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001182 unsigned long trans_start; /* Time (in jiffies) of last Tx */
1183
1184 int watchdog_timeo; /* used by dev_watchdog() */
1185 struct timer_list watchdog_timer;
1186
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 /* Number of references to this device */
Eric Dumazet29b44332010-10-11 10:22:12 +00001188 int __percpu *pcpu_refcnt;
Eric Dumazet9356b8f2005-09-27 15:23:16 -07001189
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 /* delayed register/unregister */
1191 struct list_head todo_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 /* device index hash chain */
1193 struct hlist_node index_hlist;
1194
Eric Dumazete014deb2009-11-17 05:59:21 +00001195 struct list_head link_watch_list;
Herbert Xu572a1032007-05-08 18:34:17 -07001196
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 /* register/unregister state machine */
1198 enum { NETREG_UNINITIALIZED=0,
Stephen Hemmingerb17a7c12006-05-10 13:21:17 -07001199 NETREG_REGISTERED, /* completed register_netdevice */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 NETREG_UNREGISTERING, /* called unregister_netdevice */
1201 NETREG_UNREGISTERED, /* completed unregister todo */
1202 NETREG_RELEASED, /* called free_netdev */
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001203 NETREG_DUMMY, /* dummy device for NAPI poll */
Eric Dumazet449f4542011-05-19 12:24:16 +00001204 } reg_state:8;
1205
1206 bool dismantle; /* device is going do be freed */
Patrick McHardya2835762010-02-26 06:34:51 +00001207
1208 enum {
1209 RTNL_LINK_INITIALIZED,
1210 RTNL_LINK_INITIALIZING,
1211 } rtnl_link_state:16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001213 /* Called from unregister, can be used to call free_netdev */
1214 void (*destructor)(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216#ifdef CONFIG_NETPOLL
Jeff Moyer115c1d62005-06-22 22:05:31 -07001217 struct netpoll_info *npinfo;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218#endif
David S. Millereae792b2008-07-15 03:03:33 -07001219
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001220#ifdef CONFIG_NET_NS
Eric W. Biederman4a1c5372007-09-12 11:56:32 +02001221 /* Network namespace this network device is inside */
1222 struct net *nd_net;
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001223#endif
Eric W. Biederman4a1c5372007-09-12 11:56:32 +02001224
David S. Miller49517042008-05-12 03:29:11 -07001225 /* mid-layer private */
Eric Dumazeta7855c72010-09-23 23:51:51 +00001226 union {
1227 void *ml_priv;
1228 struct pcpu_lstats __percpu *lstats; /* loopback stats */
Eric Dumazet290b8952010-09-27 00:33:35 +00001229 struct pcpu_tstats __percpu *tstats; /* tunnel stats */
Eric Dumazet6d81f412010-09-27 20:50:33 +00001230 struct pcpu_dstats __percpu *dstats; /* dummy stats */
Eric Dumazeta7855c72010-09-23 23:51:51 +00001231 };
Patrick McHardyeca9eba2008-07-05 21:26:13 -07001232 /* GARP */
Eric Dumazet3cc77ec2010-10-24 21:32:36 +00001233 struct garp_port __rcu *garp_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 /* class/net/name entry */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001236 struct device dev;
Eric W. Biederman0c509a62009-10-29 14:18:21 +00001237 /* space for optional device, statistics, and wireless sysfs groups */
1238 const struct attribute_group *sysfs_groups[4];
Patrick McHardy38f7b872007-06-13 12:03:51 -07001239
1240 /* rtnetlink link ops */
1241 const struct rtnl_link_ops *rtnl_link_ops;
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001242
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -07001243 /* for setting kernel sock attribute on TCP connection setup */
1244#define GSO_MAX_SIZE 65536
1245 unsigned int gso_max_size;
Stephen Hemmingerd3147742008-11-19 21:32:24 -08001246
Jeff Kirsher7a6b6f52008-11-25 01:02:08 -08001247#ifdef CONFIG_DCB
Alexander Duyck2f90b862008-11-20 20:52:10 -08001248 /* Data Center Bridging netlink ops */
Stephen Hemminger32953542009-10-05 06:01:03 +00001249 const struct dcbnl_rtnl_ops *dcbnl_ops;
Alexander Duyck2f90b862008-11-20 20:52:10 -08001250#endif
John Fastabend4f57c082011-01-17 08:06:04 +00001251 u8 num_tc;
1252 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
1253 u8 prio_tc_map[TC_BITMASK + 1];
Alexander Duyck2f90b862008-11-20 20:52:10 -08001254
Ben Hutchingsd11ead72011-11-25 14:40:26 +00001255#if IS_ENABLED(CONFIG_FCOE)
Yi Zou4d288d52009-02-27 14:06:59 -08001256 /* max exchange id for FCoE LRO by ddp */
1257 unsigned int fcoe_ddp_xid;
1258#endif
Neil Horman5bc14212011-11-22 05:10:51 +00001259#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
1260 struct netprio_map __rcu *priomap;
1261#endif
Richard Cochranc1f19b52010-07-17 08:49:36 +00001262 /* phy device may attach itself for hardware timestamping */
1263 struct phy_device *phydev;
Vlad Dogarucbda10f2011-01-13 23:38:30 +00001264
1265 /* group the device belongs to */
1266 int group;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267};
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001268#define to_net_dev(d) container_of(d, struct net_device, dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270#define NETDEV_ALIGN 32
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
David S. Millere8a04642008-07-17 00:34:19 -07001272static inline
John Fastabend4f57c082011-01-17 08:06:04 +00001273int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
1274{
1275 return dev->prio_tc_map[prio & TC_BITMASK];
1276}
1277
1278static inline
1279int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
1280{
1281 if (tc >= dev->num_tc)
1282 return -EINVAL;
1283
1284 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
1285 return 0;
1286}
1287
1288static inline
1289void netdev_reset_tc(struct net_device *dev)
1290{
1291 dev->num_tc = 0;
1292 memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq));
1293 memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map));
1294}
1295
1296static inline
1297int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset)
1298{
1299 if (tc >= dev->num_tc)
1300 return -EINVAL;
1301
1302 dev->tc_to_txq[tc].count = count;
1303 dev->tc_to_txq[tc].offset = offset;
1304 return 0;
1305}
1306
1307static inline
1308int netdev_set_num_tc(struct net_device *dev, u8 num_tc)
1309{
1310 if (num_tc > TC_MAX_QUEUE)
1311 return -EINVAL;
1312
1313 dev->num_tc = num_tc;
1314 return 0;
1315}
1316
1317static inline
1318int netdev_get_num_tc(struct net_device *dev)
1319{
1320 return dev->num_tc;
1321}
1322
1323static inline
David S. Millere8a04642008-07-17 00:34:19 -07001324struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
1325 unsigned int index)
1326{
1327 return &dev->_tx[index];
1328}
1329
1330static inline void netdev_for_each_tx_queue(struct net_device *dev,
1331 void (*f)(struct net_device *,
1332 struct netdev_queue *,
1333 void *),
1334 void *arg)
1335{
1336 unsigned int i;
1337
1338 for (i = 0; i < dev->num_tx_queues; i++)
1339 f(dev, &dev->_tx[i], arg);
1340}
1341
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001342/*
1343 * Net namespace inlines
1344 */
1345static inline
1346struct net *dev_net(const struct net_device *dev)
1347{
Eric Dumazetc2d9ba92010-06-01 06:51:19 +00001348 return read_pnet(&dev->nd_net);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001349}
1350
1351static inline
Denis V. Lunevf5aa23f2008-03-26 00:48:17 -07001352void dev_net_set(struct net_device *dev, struct net *net)
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001353{
1354#ifdef CONFIG_NET_NS
Denis V. Lunevf3005d72008-04-16 02:02:18 -07001355 release_net(dev->nd_net);
1356 dev->nd_net = hold_net(net);
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001357#endif
1358}
1359
Lennert Buytenhekcf85d082008-10-07 13:45:02 +00001360static inline bool netdev_uses_dsa_tags(struct net_device *dev)
1361{
1362#ifdef CONFIG_NET_DSA_TAG_DSA
1363 if (dev->dsa_ptr != NULL)
1364 return dsa_uses_dsa_tags(dev->dsa_ptr);
1365#endif
1366
1367 return 0;
1368}
1369
Arnd Bergmann8a83a002010-01-30 12:23:03 +00001370#ifndef CONFIG_NET_NS
1371static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev)
1372{
1373 skb->dev = dev;
1374}
1375#else /* CONFIG_NET_NS */
1376void skb_set_dev(struct sk_buff *skb, struct net_device *dev);
1377#endif
1378
Lennert Buytenhek396138f2008-10-07 13:46:07 +00001379static inline bool netdev_uses_trailer_tags(struct net_device *dev)
1380{
1381#ifdef CONFIG_NET_DSA_TAG_TRAILER
1382 if (dev->dsa_ptr != NULL)
1383 return dsa_uses_trailer_tags(dev->dsa_ptr);
1384#endif
1385
1386 return 0;
1387}
1388
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001389/**
1390 * netdev_priv - access network device private data
1391 * @dev: network device
1392 *
1393 * Get network device private data
1394 */
Patrick McHardy6472ce62007-06-13 12:03:21 -07001395static inline void *netdev_priv(const struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396{
Eric Dumazet1ce8e7b2009-05-27 04:42:37 +00001397 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398}
1399
Linus Torvalds1da177e2005-04-16 15:20:36 -07001400/* Set the sysfs physical device reference for the network logical device
1401 * if set prior to registration will cause a symlink during initialization.
1402 */
Greg Kroah-Hartman43cb76d2002-04-09 12:14:34 -07001403#define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404
Marcel Holtmann384912e2009-08-31 21:08:19 +00001405/* Set the sysfs device type for the network logical device to allow
1406 * fin grained indentification of different network device types. For
1407 * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc.
1408 */
1409#define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
1410
Stephen Hemminger3b582cc2007-11-01 02:21:47 -07001411/**
1412 * netif_napi_add - initialize a napi context
1413 * @dev: network device
1414 * @napi: napi context
1415 * @poll: polling function
1416 * @weight: default weight
1417 *
1418 * netif_napi_add() must be used to initialize a napi context prior to calling
1419 * *any* of the other napi related functions.
1420 */
Herbert Xud565b0a2008-12-15 23:38:52 -08001421void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
1422 int (*poll)(struct napi_struct *, int), int weight);
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001423
Alexander Duyckd8156532008-07-08 15:13:05 -07001424/**
1425 * netif_napi_del - remove a napi context
1426 * @napi: napi context
1427 *
1428 * netif_napi_del() removes a napi context from the network device napi list
1429 */
Herbert Xud565b0a2008-12-15 23:38:52 -08001430void netif_napi_del(struct napi_struct *napi);
1431
1432struct napi_gro_cb {
Herbert Xu78a478d2009-05-26 18:50:21 +00001433 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
1434 void *frag0;
1435
Herbert Xu74895942009-05-26 18:50:27 +00001436 /* Length of frag0. */
1437 unsigned int frag0_len;
1438
Herbert Xu86911732009-01-29 14:19:50 +00001439 /* This indicates where we are processing relative to skb->data. */
1440 int data_offset;
1441
Herbert Xud565b0a2008-12-15 23:38:52 -08001442 /* This is non-zero if the packet may be of the same flow. */
1443 int same_flow;
1444
1445 /* This is non-zero if the packet cannot be merged with the new skb. */
1446 int flush;
1447
1448 /* Number of segments aggregated. */
1449 int count;
Herbert Xu5d38a072009-01-04 16:13:40 -08001450
1451 /* Free the skb? */
1452 int free;
Herbert Xud565b0a2008-12-15 23:38:52 -08001453};
1454
1455#define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
Alexander Duyckd8156532008-07-08 15:13:05 -07001456
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457struct packet_type {
David S. Millerf2ccd8f2005-08-09 19:34:12 -07001458 __be16 type; /* This is really htons(ether_type). */
1459 struct net_device *dev; /* NULL is wildcarded here */
1460 int (*func) (struct sk_buff *,
1461 struct net_device *,
1462 struct packet_type *,
1463 struct net_device *);
Herbert Xu576a30e2006-06-27 13:22:38 -07001464 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001465 netdev_features_t features);
Herbert Xua430a432006-07-08 13:34:56 -07001466 int (*gso_send_check)(struct sk_buff *skb);
Herbert Xud565b0a2008-12-15 23:38:52 -08001467 struct sk_buff **(*gro_receive)(struct sk_buff **head,
1468 struct sk_buff *skb);
1469 int (*gro_complete)(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001470 void *af_packet_priv;
1471 struct list_head list;
1472};
1473
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474#include <linux/notifier.h>
1475
Amerigo Wangdcfe1422011-07-25 17:13:09 -07001476/* netdevice notifier chain. Please remember to update the rtnetlink
1477 * notification exclusion list in rtnetlink_event() when adding new
1478 * types.
1479 */
1480#define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */
1481#define NETDEV_DOWN 0x0002
1482#define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface
1483 detected a hardware crash and restarted
1484 - we can use this eg to kick tcp sessions
1485 once done */
1486#define NETDEV_CHANGE 0x0004 /* Notify device state change */
1487#define NETDEV_REGISTER 0x0005
1488#define NETDEV_UNREGISTER 0x0006
1489#define NETDEV_CHANGEMTU 0x0007
1490#define NETDEV_CHANGEADDR 0x0008
1491#define NETDEV_GOING_DOWN 0x0009
1492#define NETDEV_CHANGENAME 0x000A
1493#define NETDEV_FEAT_CHANGE 0x000B
1494#define NETDEV_BONDING_FAILOVER 0x000C
1495#define NETDEV_PRE_UP 0x000D
1496#define NETDEV_PRE_TYPE_CHANGE 0x000E
1497#define NETDEV_POST_TYPE_CHANGE 0x000F
1498#define NETDEV_POST_INIT 0x0010
1499#define NETDEV_UNREGISTER_BATCH 0x0011
1500#define NETDEV_RELEASE 0x0012
1501#define NETDEV_NOTIFY_PEERS 0x0013
1502#define NETDEV_JOIN 0x0014
1503
1504extern int register_netdevice_notifier(struct notifier_block *nb);
1505extern int unregister_netdevice_notifier(struct notifier_block *nb);
1506extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
1507
1508
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509extern rwlock_t dev_base_lock; /* Device list lock */
1510
Eric W. Biederman881d9662007-09-17 11:56:21 -07001511
1512#define for_each_netdev(net, d) \
1513 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
Eric W. Biedermandcbccbd42009-11-29 22:25:26 +00001514#define for_each_netdev_reverse(net, d) \
1515 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
Eric Dumazetc6d14c82009-11-04 05:43:23 -08001516#define for_each_netdev_rcu(net, d) \
1517 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001518#define for_each_netdev_safe(net, d, n) \
1519 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
1520#define for_each_netdev_continue(net, d) \
1521 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
stephen hemminger254245d2009-11-10 07:54:47 +00001522#define for_each_netdev_continue_rcu(net, d) \
1523 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
Pavel Emelianov7562f872007-05-03 15:13:45 -07001524#define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
1525
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001526static inline struct net_device *next_net_device(struct net_device *dev)
1527{
1528 struct list_head *lh;
1529 struct net *net;
Pavel Emelianov7562f872007-05-03 15:13:45 -07001530
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +09001531 net = dev_net(dev);
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001532 lh = dev->dev_list.next;
1533 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1534}
1535
Eric Dumazetce81b762009-11-11 17:34:30 +00001536static inline struct net_device *next_net_device_rcu(struct net_device *dev)
1537{
1538 struct list_head *lh;
1539 struct net *net;
1540
1541 net = dev_net(dev);
Eric Dumazetccf43432011-01-26 18:08:02 +00001542 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
Eric Dumazetce81b762009-11-11 17:34:30 +00001543 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1544}
1545
Daniel Lezcanoa050c332007-09-12 14:57:09 +02001546static inline struct net_device *first_net_device(struct net *net)
1547{
1548 return list_empty(&net->dev_base_head) ? NULL :
1549 net_device_entry(net->dev_base_head.next);
1550}
Pavel Emelianov7562f872007-05-03 15:13:45 -07001551
Eric Dumazetccf43432011-01-26 18:08:02 +00001552static inline struct net_device *first_net_device_rcu(struct net *net)
1553{
1554 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
1555
1556 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
1557}
1558
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559extern int netdev_boot_setup_check(struct net_device *dev);
1560extern unsigned long netdev_boot_base(const char *prefix, int unit);
Eric Dumazet941666c2010-12-05 01:23:53 +00001561extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
1562 const char *hwaddr);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001563extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
1564extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565extern void dev_add_pack(struct packet_type *pt);
1566extern void dev_remove_pack(struct packet_type *pt);
1567extern void __dev_remove_pack(struct packet_type *pt);
1568
Eric Dumazetbb69ae02010-06-07 11:42:13 +00001569extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags,
1570 unsigned short mask);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001571extern struct net_device *dev_get_by_name(struct net *net, const char *name);
Eric Dumazet72c95282009-10-30 07:11:27 +00001572extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07001573extern struct net_device *__dev_get_by_name(struct net *net, const char *name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574extern int dev_alloc_name(struct net_device *dev, const char *name);
1575extern int dev_open(struct net_device *dev);
1576extern int dev_close(struct net_device *dev);
Ben Hutchings0187bdf2008-06-19 16:15:47 -07001577extern void dev_disable_lro(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578extern int dev_queue_xmit(struct sk_buff *skb);
1579extern int register_netdevice(struct net_device *dev);
Eric Dumazet44a08732009-10-27 07:03:04 +00001580extern void unregister_netdevice_queue(struct net_device *dev,
1581 struct list_head *head);
Eric Dumazet9b5e3832009-10-27 07:04:19 +00001582extern void unregister_netdevice_many(struct list_head *head);
Eric Dumazet44a08732009-10-27 07:03:04 +00001583static inline void unregister_netdevice(struct net_device *dev)
1584{
1585 unregister_netdevice_queue(dev, NULL);
1586}
1587
Eric Dumazet29b44332010-10-11 10:22:12 +00001588extern int netdev_refcnt_read(const struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589extern void free_netdev(struct net_device *dev);
1590extern void synchronize_net(void);
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001591extern int init_dummy_netdev(struct net_device *dev);
David S. Miller9d40bbd2009-03-04 23:46:25 -08001592extern void netdev_resync_ops(struct net_device *dev);
Benjamin Herrenschmidt937f1ba2009-01-14 21:05:05 -08001593
Eric W. Biederman881d9662007-09-17 11:56:21 -07001594extern struct net_device *dev_get_by_index(struct net *net, int ifindex);
1595extern struct net_device *__dev_get_by_index(struct net *net, int ifindex);
Eric Dumazetfb699dfd2009-10-19 19:18:49 +00001596extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597extern int dev_restart(struct net_device *dev);
1598#ifdef CONFIG_NETPOLL_TRAP
1599extern int netpoll_trap(void);
1600#endif
Herbert Xu86911732009-01-29 14:19:50 +00001601extern int skb_gro_receive(struct sk_buff **head,
1602 struct sk_buff *skb);
Herbert Xu78a478d2009-05-26 18:50:21 +00001603extern void skb_gro_reset_offset(struct sk_buff *skb);
Herbert Xu86911732009-01-29 14:19:50 +00001604
1605static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
1606{
1607 return NAPI_GRO_CB(skb)->data_offset;
1608}
1609
1610static inline unsigned int skb_gro_len(const struct sk_buff *skb)
1611{
1612 return skb->len - NAPI_GRO_CB(skb)->data_offset;
1613}
1614
1615static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
1616{
1617 NAPI_GRO_CB(skb)->data_offset += len;
1618}
1619
Herbert Xua5b1cf22009-05-26 18:50:28 +00001620static inline void *skb_gro_header_fast(struct sk_buff *skb,
1621 unsigned int offset)
Herbert Xu86911732009-01-29 14:19:50 +00001622{
Herbert Xu78a478d2009-05-26 18:50:21 +00001623 return NAPI_GRO_CB(skb)->frag0 + offset;
Herbert Xu86911732009-01-29 14:19:50 +00001624}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001625
Herbert Xua5b1cf22009-05-26 18:50:28 +00001626static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
1627{
1628 return NAPI_GRO_CB(skb)->frag0_len < hlen;
1629}
1630
1631static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
1632 unsigned int offset)
1633{
Herbert Xu17dd7592011-07-27 06:16:28 -07001634 if (!pskb_may_pull(skb, hlen))
1635 return NULL;
1636
Herbert Xua5b1cf22009-05-26 18:50:28 +00001637 NAPI_GRO_CB(skb)->frag0 = NULL;
1638 NAPI_GRO_CB(skb)->frag0_len = 0;
Herbert Xu17dd7592011-07-27 06:16:28 -07001639 return skb->data + offset;
Herbert Xua5b1cf22009-05-26 18:50:28 +00001640}
1641
Herbert Xuaa4b9f52009-02-08 18:00:37 +00001642static inline void *skb_gro_mac_header(struct sk_buff *skb)
1643{
Herbert Xu78d3fd02009-05-26 18:50:23 +00001644 return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb);
Herbert Xuaa4b9f52009-02-08 18:00:37 +00001645}
1646
Herbert Xu36e7b1b2009-04-27 05:44:45 -07001647static inline void *skb_gro_network_header(struct sk_buff *skb)
1648{
Herbert Xu78d3fd02009-05-26 18:50:23 +00001649 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
1650 skb_network_offset(skb);
Herbert Xu36e7b1b2009-04-27 05:44:45 -07001651}
1652
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001653static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
1654 unsigned short type,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001655 const void *daddr, const void *saddr,
1656 unsigned len)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001657{
Ursula Braunf1ecfd52007-10-22 16:16:14 +02001658 if (!dev->header_ops || !dev->header_ops->create)
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001659 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001660
1661 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
Stephen Hemminger0c4e8582007-10-09 01:36:32 -07001662}
1663
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001664static inline int dev_parse_header(const struct sk_buff *skb,
1665 unsigned char *haddr)
1666{
1667 const struct net_device *dev = skb->dev;
1668
Patrick McHardy1b833362007-10-18 05:09:28 -07001669 if (!dev->header_ops || !dev->header_ops->parse)
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001670 return 0;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -07001671 return dev->header_ops->parse(skb, haddr);
Stephen Hemmingerb95cce32007-09-26 22:13:38 -07001672}
1673
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len);
1675extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf);
1676static inline int unregister_gifconf(unsigned int family)
1677{
1678 return register_gifconf(family, NULL);
1679}
1680
1681/*
Eric Dumazet88751272010-04-19 05:07:33 +00001682 * Incoming packets are placed on per-cpu queues
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683 */
Eric Dumazetd94d9fe2009-11-04 09:50:58 -08001684struct softnet_data {
David S. Miller37437bb2008-07-16 02:15:04 -07001685 struct Qdisc *output_queue;
Changli Gaoa9cbd582010-04-26 23:06:24 +00001686 struct Qdisc **output_queue_tailp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001687 struct list_head poll_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 struct sk_buff *completion_queue;
Changli Gao6e7676c2010-04-27 15:07:33 -07001689 struct sk_buff_head process_queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690
Changli Gaodee42872010-05-02 05:42:16 +00001691 /* stats */
David S. Millercd7b5392010-05-02 22:27:59 -07001692 unsigned int processed;
1693 unsigned int time_squeeze;
1694 unsigned int cpu_collision;
1695 unsigned int received_rps;
Changli Gaodee42872010-05-02 05:42:16 +00001696
Changli Gaofd793d82010-04-15 00:16:59 -07001697#ifdef CONFIG_RPS
Eric Dumazet88751272010-04-19 05:07:33 +00001698 struct softnet_data *rps_ipi_list;
1699
1700 /* Elements below can be accessed between CPUs for RPS */
Tom Herbert0a9627f2010-03-16 08:03:29 +00001701 struct call_single_data csd ____cacheline_aligned_in_smp;
Eric Dumazet88751272010-04-19 05:07:33 +00001702 struct softnet_data *rps_ipi_next;
1703 unsigned int cpu;
Tom Herbertfec5e652010-04-16 16:01:27 -07001704 unsigned int input_queue_head;
Tom Herbert76cc8b12010-05-20 18:37:59 +00001705 unsigned int input_queue_tail;
Tom Herbert1e94d722010-03-18 17:45:44 -07001706#endif
Changli Gaodee42872010-05-02 05:42:16 +00001707 unsigned dropped;
Tom Herbert0a9627f2010-03-16 08:03:29 +00001708 struct sk_buff_head input_pkt_queue;
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001709 struct napi_struct backlog;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710};
1711
Tom Herbert76cc8b12010-05-20 18:37:59 +00001712static inline void input_queue_head_incr(struct softnet_data *sd)
Tom Herbertfec5e652010-04-16 16:01:27 -07001713{
1714#ifdef CONFIG_RPS
Tom Herbert76cc8b12010-05-20 18:37:59 +00001715 sd->input_queue_head++;
1716#endif
1717}
1718
1719static inline void input_queue_tail_incr_save(struct softnet_data *sd,
1720 unsigned int *qtail)
1721{
1722#ifdef CONFIG_RPS
1723 *qtail = ++sd->input_queue_tail;
Tom Herbertfec5e652010-04-16 16:01:27 -07001724#endif
1725}
1726
Tom Herbert0a9627f2010-03-16 08:03:29 +00001727DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
David S. Miller37437bb2008-07-16 02:15:04 -07001729extern void __netif_schedule(struct Qdisc *q);
David S. Miller86d804e2008-07-08 23:11:25 -07001730
1731static inline void netif_schedule_queue(struct netdev_queue *txq)
1732{
Tom Herbert734664982011-11-28 16:32:44 +00001733 if (!(txq->state & QUEUE_STATE_ANY_XOFF))
David S. Miller37437bb2008-07-16 02:15:04 -07001734 __netif_schedule(txq->qdisc);
David S. Miller86d804e2008-07-08 23:11:25 -07001735}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001737static inline void netif_tx_schedule_all(struct net_device *dev)
1738{
1739 unsigned int i;
1740
1741 for (i = 0; i < dev->num_tx_queues; i++)
1742 netif_schedule_queue(netdev_get_tx_queue(dev, i));
1743}
1744
Dave Jonesd29f7492008-07-22 14:09:06 -07001745static inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
1746{
Tom Herbert734664982011-11-28 16:32:44 +00001747 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
Dave Jonesd29f7492008-07-22 14:09:06 -07001748}
1749
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001750/**
1751 * netif_start_queue - allow transmit
1752 * @dev: network device
1753 *
1754 * Allow upper layers to call the device hard_start_xmit routine.
1755 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756static inline void netif_start_queue(struct net_device *dev)
1757{
David S. Millere8a04642008-07-17 00:34:19 -07001758 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759}
1760
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001761static inline void netif_tx_start_all_queues(struct net_device *dev)
1762{
1763 unsigned int i;
1764
1765 for (i = 0; i < dev->num_tx_queues; i++) {
1766 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1767 netif_tx_start_queue(txq);
1768 }
1769}
1770
David S. Miller79d16382008-07-08 23:14:46 -07001771static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772{
1773#ifdef CONFIG_NETPOLL_TRAP
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001774 if (netpoll_trap()) {
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001775 netif_tx_start_queue(dev_queue);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776 return;
Sergei Shtylyov5f286e12007-04-28 20:57:37 -07001777 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778#endif
Tom Herbert734664982011-11-28 16:32:44 +00001779 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001780 __netif_schedule(dev_queue->qdisc);
David S. Miller79d16382008-07-08 23:14:46 -07001781}
1782
Dave Jonesd29f7492008-07-22 14:09:06 -07001783/**
1784 * netif_wake_queue - restart transmit
1785 * @dev: network device
1786 *
1787 * Allow upper layers to call the device hard_start_xmit routine.
1788 * Used for flow control when transmit resources are available.
1789 */
David S. Miller79d16382008-07-08 23:14:46 -07001790static inline void netif_wake_queue(struct net_device *dev)
1791{
David S. Millere8a04642008-07-17 00:34:19 -07001792 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793}
1794
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001795static inline void netif_tx_wake_all_queues(struct net_device *dev)
1796{
1797 unsigned int i;
1798
1799 for (i = 0; i < dev->num_tx_queues; i++) {
1800 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1801 netif_tx_wake_queue(txq);
1802 }
1803}
1804
Dave Jonesd29f7492008-07-22 14:09:06 -07001805static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
1806{
Guillaume Chazarain18543a62010-11-06 06:39:32 +00001807 if (WARN_ON(!dev_queue)) {
Joe Perches256ee432011-03-01 07:06:12 +00001808 pr_info("netif_stop_queue() cannot be called before register_netdev()\n");
Guillaume Chazarain18543a62010-11-06 06:39:32 +00001809 return;
1810 }
Tom Herbert734664982011-11-28 16:32:44 +00001811 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
Dave Jonesd29f7492008-07-22 14:09:06 -07001812}
1813
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001814/**
1815 * netif_stop_queue - stop transmitted packets
1816 * @dev: network device
1817 *
1818 * Stop upper layers calling the device hard_start_xmit routine.
1819 * Used for flow control when transmit resources are unavailable.
1820 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821static inline void netif_stop_queue(struct net_device *dev)
1822{
David S. Millere8a04642008-07-17 00:34:19 -07001823 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824}
1825
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001826static inline void netif_tx_stop_all_queues(struct net_device *dev)
1827{
1828 unsigned int i;
1829
1830 for (i = 0; i < dev->num_tx_queues; i++) {
1831 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
1832 netif_tx_stop_queue(txq);
1833 }
1834}
1835
Dave Jonesd29f7492008-07-22 14:09:06 -07001836static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
1837{
Tom Herbert734664982011-11-28 16:32:44 +00001838 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
Dave Jonesd29f7492008-07-22 14:09:06 -07001839}
1840
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001841/**
1842 * netif_queue_stopped - test if transmit queue is flowblocked
1843 * @dev: network device
1844 *
1845 * Test if transmit queue on device is currently unable to send.
1846 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847static inline int netif_queue_stopped(const struct net_device *dev)
1848{
David S. Millere8a04642008-07-17 00:34:19 -07001849 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850}
1851
Tom Herbert734664982011-11-28 16:32:44 +00001852static inline int netif_xmit_stopped(const struct netdev_queue *dev_queue)
David S. Millerc3f26a22008-07-31 16:58:50 -07001853{
Tom Herbert734664982011-11-28 16:32:44 +00001854 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
1855}
1856
1857static inline int netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
1858{
1859 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
1860}
1861
David S. Millerc3f26a22008-07-31 16:58:50 -07001862}
1863
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001864/**
1865 * netif_running - test if up
1866 * @dev: network device
1867 *
1868 * Test if the device has been brought up.
1869 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870static inline int netif_running(const struct net_device *dev)
1871{
1872 return test_bit(__LINK_STATE_START, &dev->state);
1873}
1874
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001875/*
1876 * Routines to manage the subqueues on a device. We only need start
1877 * stop, and a check if it's stopped. All other device management is
1878 * done at the overall netdevice level.
1879 * Also test the device if we're multiqueue.
1880 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001881
1882/**
1883 * netif_start_subqueue - allow sending packets on subqueue
1884 * @dev: network device
1885 * @queue_index: sub queue index
1886 *
1887 * Start individual transmit queue of a device with multiple transmit queues.
1888 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001889static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
1890{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001891 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001892
1893 netif_tx_start_queue(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001894}
1895
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001896/**
1897 * netif_stop_subqueue - stop sending packets on subqueue
1898 * @dev: network device
1899 * @queue_index: sub queue index
1900 *
1901 * Stop individual transmit queue of a device with multiple transmit queues.
1902 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001903static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
1904{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001905 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001906#ifdef CONFIG_NETPOLL_TRAP
1907 if (netpoll_trap())
1908 return;
1909#endif
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001910 netif_tx_stop_queue(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001911}
1912
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001913/**
1914 * netif_subqueue_stopped - test status of subqueue
1915 * @dev: network device
1916 * @queue_index: sub queue index
1917 *
1918 * Check individual transmit queue of a device with multiple transmit queues.
1919 */
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001920static inline int __netif_subqueue_stopped(const struct net_device *dev,
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001921 u16 queue_index)
1922{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001923 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00001924
1925 return netif_tx_queue_stopped(txq);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001926}
1927
Pavel Emelyanov668f8952007-10-21 17:01:56 -07001928static inline int netif_subqueue_stopped(const struct net_device *dev,
1929 struct sk_buff *skb)
1930{
1931 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
1932}
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001933
1934/**
1935 * netif_wake_subqueue - allow sending packets on subqueue
1936 * @dev: network device
1937 * @queue_index: sub queue index
1938 *
1939 * Resume individual transmit queue of a device with multiple transmit queues.
1940 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001941static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
1942{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07001943 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001944#ifdef CONFIG_NETPOLL_TRAP
1945 if (netpoll_trap())
1946 return;
1947#endif
Tom Herbert734664982011-11-28 16:32:44 +00001948 if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state))
David S. Miller37437bb2008-07-16 02:15:04 -07001949 __netif_schedule(txq->qdisc);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001950}
1951
Vladislav Zolotarova3d22a62010-12-13 06:27:10 +00001952/*
1953 * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used
1954 * as a distribution range limit for the returned value.
1955 */
1956static inline u16 skb_tx_hash(const struct net_device *dev,
1957 const struct sk_buff *skb)
1958{
1959 return __skb_tx_hash(dev, skb, dev->real_num_tx_queues);
1960}
1961
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001962/**
1963 * netif_is_multiqueue - test if device has multiple transmit queues
1964 * @dev: network device
1965 *
1966 * Check if device has multiple transmit queues
Stephen Hemmingerbea33482007-10-03 16:41:36 -07001967 */
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001968static inline int netif_is_multiqueue(const struct net_device *dev)
1969{
Eric Dumazeta02cec22010-09-22 20:43:57 +00001970 return dev->num_tx_queues > 1;
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07001971}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972
Tom Herberte6484932010-10-18 18:04:39 +00001973extern int netif_set_real_num_tx_queues(struct net_device *dev,
1974 unsigned int txq);
John Fastabendf0796d52010-07-01 13:21:57 +00001975
Ben Hutchings62fe0b42010-09-27 08:24:33 +00001976#ifdef CONFIG_RPS
1977extern int netif_set_real_num_rx_queues(struct net_device *dev,
1978 unsigned int rxq);
1979#else
1980static inline int netif_set_real_num_rx_queues(struct net_device *dev,
1981 unsigned int rxq)
1982{
1983 return 0;
1984}
1985#endif
1986
Ben Hutchings3171d022010-09-27 08:24:49 +00001987static inline int netif_copy_real_num_queues(struct net_device *to_dev,
1988 const struct net_device *from_dev)
1989{
1990 netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
1991#ifdef CONFIG_RPS
1992 return netif_set_real_num_rx_queues(to_dev,
1993 from_dev->real_num_rx_queues);
1994#else
1995 return 0;
1996#endif
1997}
1998
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999/* Use this variant when it is known for sure that it
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07002000 * is executing from hardware interrupt context or with hardware interrupts
2001 * disabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002002 */
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002003extern void dev_kfree_skb_irq(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004
2005/* Use this variant in places where it could be invoked
Matti Linnanvuori0ef47302008-03-28 16:33:00 -07002006 * from either hardware interrupt or other context, with hardware interrupts
2007 * either disabled or enabled.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 */
Denis Vlasenko56079432006-03-29 15:57:29 -08002009extern void dev_kfree_skb_any(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002010
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011extern int netif_rx(struct sk_buff *skb);
2012extern int netif_rx_ni(struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013extern int netif_receive_skb(struct sk_buff *skb);
Ben Hutchings5b252f02009-10-29 07:17:09 +00002014extern gro_result_t dev_gro_receive(struct napi_struct *napi,
Herbert Xu96e93ea2009-01-06 10:49:34 -08002015 struct sk_buff *skb);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07002016extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb);
2017extern gro_result_t napi_gro_receive(struct napi_struct *napi,
Herbert Xud565b0a2008-12-15 23:38:52 -08002018 struct sk_buff *skb);
Eric Dumazet86cac582010-08-31 18:25:32 +00002019extern void napi_gro_flush(struct napi_struct *napi);
Herbert Xu76620aa2009-04-16 02:02:07 -07002020extern struct sk_buff * napi_get_frags(struct napi_struct *napi);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07002021extern gro_result_t napi_frags_finish(struct napi_struct *napi,
Ben Hutchings5b252f02009-10-29 07:17:09 +00002022 struct sk_buff *skb,
2023 gro_result_t ret);
Herbert Xu76620aa2009-04-16 02:02:07 -07002024extern struct sk_buff * napi_frags_skb(struct napi_struct *napi);
Ben Hutchingsc7c4b3b2009-10-29 21:36:53 -07002025extern gro_result_t napi_gro_frags(struct napi_struct *napi);
Herbert Xu76620aa2009-04-16 02:02:07 -07002026
2027static inline void napi_free_frags(struct napi_struct *napi)
2028{
2029 kfree_skb(napi->skb);
2030 napi->skb = NULL;
2031}
2032
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00002033extern int netdev_rx_handler_register(struct net_device *dev,
Jiri Pirko93e2c322010-06-10 03:34:59 +00002034 rx_handler_func_t *rx_handler,
2035 void *rx_handler_data);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00002036extern void netdev_rx_handler_unregister(struct net_device *dev);
2037
Mitch Williamsc2373ee2005-11-09 10:34:45 -08002038extern int dev_valid_name(const char *name);
Eric W. Biederman881d9662007-09-17 11:56:21 -07002039extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *);
2040extern int dev_ethtool(struct net *net, struct ifreq *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041extern unsigned dev_get_flags(const struct net_device *);
Patrick McHardybd380812010-02-26 06:34:53 +00002042extern int __dev_change_flags(struct net_device *, unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043extern int dev_change_flags(struct net_device *, unsigned);
Patrick McHardybd380812010-02-26 06:34:53 +00002044extern void __dev_notify_flags(struct net_device *, unsigned int old_flags);
Stephen Hemmingercf04a4c72008-09-30 02:22:14 -07002045extern int dev_change_name(struct net_device *, const char *);
Stephen Hemminger0b815a12008-09-22 21:28:11 -07002046extern int dev_set_alias(struct net_device *, const char *, size_t);
Eric W. Biedermance286d32007-09-12 13:53:49 +02002047extern int dev_change_net_namespace(struct net_device *,
2048 struct net *, const char *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049extern int dev_set_mtu(struct net_device *, int);
Vlad Dogarucbda10f2011-01-13 23:38:30 +00002050extern void dev_set_group(struct net_device *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051extern int dev_set_mac_address(struct net_device *,
2052 struct sockaddr *);
Herbert Xuf6a78bf2006-06-22 02:57:17 -07002053extern int dev_hard_start_xmit(struct sk_buff *skb,
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002054 struct net_device *dev,
2055 struct netdev_queue *txq);
Arnd Bergmann44540962009-11-26 06:07:08 +00002056extern int dev_forward_skb(struct net_device *dev,
2057 struct sk_buff *skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002058
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03002059extern int netdev_budget;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060
2061/* Called by rtnetlink.c:rtnl_unlock() */
2062extern void netdev_run_todo(void);
2063
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002064/**
2065 * dev_put - release reference to device
2066 * @dev: network device
2067 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07002068 * Release reference to device to allow it to be freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002069 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070static inline void dev_put(struct net_device *dev)
2071{
Eric Dumazet29b44332010-10-11 10:22:12 +00002072 irqsafe_cpu_dec(*dev->pcpu_refcnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073}
2074
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002075/**
2076 * dev_hold - get reference to device
2077 * @dev: network device
2078 *
Benjamin Thery9ef44292007-10-10 21:18:17 -07002079 * Hold reference to device to keep it from being freed.
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002080 */
Stephen Hemminger15333062006-03-20 22:32:28 -08002081static inline void dev_hold(struct net_device *dev)
2082{
Eric Dumazet29b44332010-10-11 10:22:12 +00002083 irqsafe_cpu_inc(*dev->pcpu_refcnt);
Stephen Hemminger15333062006-03-20 22:32:28 -08002084}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002085
2086/* Carrier loss detection, dial on demand. The functions netif_carrier_on
2087 * and _off may be called from IRQ context, but it is caller
2088 * who is responsible for serialization of these calls.
Stefan Rompfb00055a2006-03-20 17:09:11 -08002089 *
2090 * The name carrier is inappropriate, these functions should really be
2091 * called netif_lowerlayer_*() because they represent the state of any
2092 * kind of lower layer not just hardware media.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 */
2094
2095extern void linkwatch_fire_event(struct net_device *dev);
Eric Dumazete014deb2009-11-17 05:59:21 +00002096extern void linkwatch_forget_dev(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002098/**
2099 * netif_carrier_ok - test if carrier present
2100 * @dev: network device
2101 *
2102 * Check if carrier is present on device
2103 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002104static inline int netif_carrier_ok(const struct net_device *dev)
2105{
2106 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
2107}
2108
Eric Dumazet9d214932009-05-17 20:55:16 -07002109extern unsigned long dev_trans_start(struct net_device *dev);
2110
Linus Torvalds1da177e2005-04-16 15:20:36 -07002111extern void __netdev_watchdog_up(struct net_device *dev);
2112
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07002113extern void netif_carrier_on(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114
Denis Vlasenko0a242ef2005-08-11 15:32:53 -07002115extern void netif_carrier_off(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116
Ian Campbell06c46482010-05-26 00:09:42 +00002117extern void netif_notify_peers(struct net_device *dev);
2118
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002119/**
2120 * netif_dormant_on - mark device as dormant.
2121 * @dev: network device
2122 *
2123 * Mark device as dormant (as per RFC2863).
2124 *
2125 * The dormant state indicates that the relevant interface is not
2126 * actually in a condition to pass packets (i.e., it is not 'up') but is
2127 * in a "pending" state, waiting for some external event. For "on-
2128 * demand" interfaces, this new state identifies the situation where the
2129 * interface is waiting for events to place it in the up state.
2130 *
2131 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08002132static inline void netif_dormant_on(struct net_device *dev)
2133{
2134 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
2135 linkwatch_fire_event(dev);
2136}
2137
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002138/**
2139 * netif_dormant_off - set device as not dormant.
2140 * @dev: network device
2141 *
2142 * Device is not in dormant state.
2143 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08002144static inline void netif_dormant_off(struct net_device *dev)
2145{
2146 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
2147 linkwatch_fire_event(dev);
2148}
2149
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002150/**
2151 * netif_dormant - test if carrier present
2152 * @dev: network device
2153 *
2154 * Check if carrier is present on device
2155 */
Stefan Rompfb00055a2006-03-20 17:09:11 -08002156static inline int netif_dormant(const struct net_device *dev)
2157{
2158 return test_bit(__LINK_STATE_DORMANT, &dev->state);
2159}
2160
2161
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002162/**
2163 * netif_oper_up - test if device is operational
2164 * @dev: network device
2165 *
2166 * Check if carrier is operational
2167 */
Eric Dumazetd94d9fe2009-11-04 09:50:58 -08002168static inline int netif_oper_up(const struct net_device *dev)
2169{
Stefan Rompfb00055a2006-03-20 17:09:11 -08002170 return (dev->operstate == IF_OPER_UP ||
2171 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
2172}
2173
Stephen Hemmingerbea33482007-10-03 16:41:36 -07002174/**
2175 * netif_device_present - is device available or removed
2176 * @dev: network device
2177 *
2178 * Check if device has not been removed from system.
2179 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180static inline int netif_device_present(struct net_device *dev)
2181{
2182 return test_bit(__LINK_STATE_PRESENT, &dev->state);
2183}
2184
Denis Vlasenko56079432006-03-29 15:57:29 -08002185extern void netif_device_detach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002186
Denis Vlasenko56079432006-03-29 15:57:29 -08002187extern void netif_device_attach(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002188
2189/*
2190 * Network interface message level settings
2191 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002192
2193enum {
2194 NETIF_MSG_DRV = 0x0001,
2195 NETIF_MSG_PROBE = 0x0002,
2196 NETIF_MSG_LINK = 0x0004,
2197 NETIF_MSG_TIMER = 0x0008,
2198 NETIF_MSG_IFDOWN = 0x0010,
2199 NETIF_MSG_IFUP = 0x0020,
2200 NETIF_MSG_RX_ERR = 0x0040,
2201 NETIF_MSG_TX_ERR = 0x0080,
2202 NETIF_MSG_TX_QUEUED = 0x0100,
2203 NETIF_MSG_INTR = 0x0200,
2204 NETIF_MSG_TX_DONE = 0x0400,
2205 NETIF_MSG_RX_STATUS = 0x0800,
2206 NETIF_MSG_PKTDATA = 0x1000,
2207 NETIF_MSG_HW = 0x2000,
2208 NETIF_MSG_WOL = 0x4000,
2209};
2210
2211#define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
2212#define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
2213#define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
2214#define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
2215#define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
2216#define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
2217#define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
2218#define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
2219#define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
2220#define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
2221#define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
2222#define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
2223#define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
2224#define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
2225#define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
2226
2227static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
2228{
2229 /* use default */
2230 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
2231 return default_msg_enable_bits;
2232 if (debug_value == 0) /* no output */
2233 return 0;
2234 /* set low N bits */
2235 return (1 << debug_value) - 1;
2236}
2237
David S. Millerc773e842008-07-08 23:13:53 -07002238static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
Herbert Xu932ff272006-06-09 12:20:56 -07002239{
David S. Millerc773e842008-07-08 23:13:53 -07002240 spin_lock(&txq->_xmit_lock);
2241 txq->xmit_lock_owner = cpu;
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002242}
2243
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002244static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
2245{
2246 spin_lock_bh(&txq->_xmit_lock);
2247 txq->xmit_lock_owner = smp_processor_id();
2248}
2249
David S. Millerc773e842008-07-08 23:13:53 -07002250static inline int __netif_tx_trylock(struct netdev_queue *txq)
2251{
2252 int ok = spin_trylock(&txq->_xmit_lock);
2253 if (likely(ok))
2254 txq->xmit_lock_owner = smp_processor_id();
2255 return ok;
Herbert Xu932ff272006-06-09 12:20:56 -07002256}
2257
David S. Millerc773e842008-07-08 23:13:53 -07002258static inline void __netif_tx_unlock(struct netdev_queue *txq)
2259{
2260 txq->xmit_lock_owner = -1;
2261 spin_unlock(&txq->_xmit_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07002262}
2263
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002264static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
2265{
2266 txq->xmit_lock_owner = -1;
2267 spin_unlock_bh(&txq->_xmit_lock);
2268}
2269
Eric Dumazet08baf562009-05-25 22:58:01 -07002270static inline void txq_trans_update(struct netdev_queue *txq)
2271{
2272 if (txq->xmit_lock_owner != -1)
2273 txq->trans_start = jiffies;
2274}
2275
David S. Millerc3f26a22008-07-31 16:58:50 -07002276/**
2277 * netif_tx_lock - grab network device transmit lock
2278 * @dev: network device
David S. Millerc3f26a22008-07-31 16:58:50 -07002279 *
2280 * Get network device transmit lock
2281 */
2282static inline void netif_tx_lock(struct net_device *dev)
2283{
2284 unsigned int i;
2285 int cpu;
2286
2287 spin_lock(&dev->tx_global_lock);
2288 cpu = smp_processor_id();
2289 for (i = 0; i < dev->num_tx_queues; i++) {
2290 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
2291
2292 /* We are the only thread of execution doing a
2293 * freeze, but we have to grab the _xmit_lock in
2294 * order to synchronize with threads which are in
2295 * the ->hard_start_xmit() handler and already
2296 * checked the frozen bit.
2297 */
2298 __netif_tx_lock(txq, cpu);
2299 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
2300 __netif_tx_unlock(txq);
2301 }
2302}
2303
2304static inline void netif_tx_lock_bh(struct net_device *dev)
2305{
2306 local_bh_disable();
2307 netif_tx_lock(dev);
2308}
2309
Herbert Xu932ff272006-06-09 12:20:56 -07002310static inline void netif_tx_unlock(struct net_device *dev)
2311{
David S. Millere8a04642008-07-17 00:34:19 -07002312 unsigned int i;
David S. Millerc773e842008-07-08 23:13:53 -07002313
David S. Millere8a04642008-07-17 00:34:19 -07002314 for (i = 0; i < dev->num_tx_queues; i++) {
2315 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millere8a04642008-07-17 00:34:19 -07002316
David S. Millerc3f26a22008-07-31 16:58:50 -07002317 /* No need to grab the _xmit_lock here. If the
2318 * queue is not stopped for another reason, we
2319 * force a schedule.
2320 */
2321 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
Krishna Kumar7b3d3e42009-08-29 20:21:21 +00002322 netif_schedule_queue(txq);
David S. Millerc3f26a22008-07-31 16:58:50 -07002323 }
2324 spin_unlock(&dev->tx_global_lock);
Herbert Xu932ff272006-06-09 12:20:56 -07002325}
2326
2327static inline void netif_tx_unlock_bh(struct net_device *dev)
2328{
David S. Millere8a04642008-07-17 00:34:19 -07002329 netif_tx_unlock(dev);
2330 local_bh_enable();
Herbert Xu932ff272006-06-09 12:20:56 -07002331}
2332
David S. Millerc773e842008-07-08 23:13:53 -07002333#define HARD_TX_LOCK(dev, txq, cpu) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002334 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07002335 __netif_tx_lock(txq, cpu); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002336 } \
2337}
2338
David S. Millerc773e842008-07-08 23:13:53 -07002339#define HARD_TX_UNLOCK(dev, txq) { \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002340 if ((dev->features & NETIF_F_LLTX) == 0) { \
David S. Millerc773e842008-07-08 23:13:53 -07002341 __netif_tx_unlock(txq); \
Jamal Hadi Salim22dd7492007-09-16 14:40:49 -07002342 } \
2343}
2344
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345static inline void netif_tx_disable(struct net_device *dev)
2346{
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002347 unsigned int i;
David S. Millerc3f26a22008-07-31 16:58:50 -07002348 int cpu;
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002349
David S. Millerc3f26a22008-07-31 16:58:50 -07002350 local_bh_disable();
2351 cpu = smp_processor_id();
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002352 for (i = 0; i < dev->num_tx_queues; i++) {
2353 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
David S. Millerc3f26a22008-07-31 16:58:50 -07002354
2355 __netif_tx_lock(txq, cpu);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002356 netif_tx_stop_queue(txq);
David S. Millerc3f26a22008-07-31 16:58:50 -07002357 __netif_tx_unlock(txq);
David S. Millerfd2ea0a2008-07-17 01:56:23 -07002358 }
David S. Millerc3f26a22008-07-31 16:58:50 -07002359 local_bh_enable();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360}
2361
David S. Millere308a5d2008-07-15 00:13:44 -07002362static inline void netif_addr_lock(struct net_device *dev)
2363{
2364 spin_lock(&dev->addr_list_lock);
2365}
2366
2367static inline void netif_addr_lock_bh(struct net_device *dev)
2368{
2369 spin_lock_bh(&dev->addr_list_lock);
2370}
2371
2372static inline void netif_addr_unlock(struct net_device *dev)
2373{
2374 spin_unlock(&dev->addr_list_lock);
2375}
2376
2377static inline void netif_addr_unlock_bh(struct net_device *dev)
2378{
2379 spin_unlock_bh(&dev->addr_list_lock);
2380}
2381
Jiri Pirkof001fde2009-05-05 02:48:28 +00002382/*
Jiri Pirko31278e72009-06-17 01:12:19 +00002383 * dev_addrs walker. Should be used only for read access. Call with
Jiri Pirkof001fde2009-05-05 02:48:28 +00002384 * rcu_read_lock held.
2385 */
2386#define for_each_dev_addr(dev, ha) \
Jiri Pirko31278e72009-06-17 01:12:19 +00002387 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
Jiri Pirkof001fde2009-05-05 02:48:28 +00002388
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389/* These functions live elsewhere (drivers/net/net_init.c, but related) */
2390
2391extern void ether_setup(struct net_device *dev);
2392
2393/* Support for loadable net-drivers */
Tom Herbert36909ea2011-01-09 19:36:31 +00002394extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07002395 void (*setup)(struct net_device *),
Tom Herbert36909ea2011-01-09 19:36:31 +00002396 unsigned int txqs, unsigned int rxqs);
Peter P Waskiewicz Jrf25f4e42007-07-06 13:36:20 -07002397#define alloc_netdev(sizeof_priv, name, setup) \
Tom Herbert36909ea2011-01-09 19:36:31 +00002398 alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1)
2399
2400#define alloc_netdev_mq(sizeof_priv, name, setup, count) \
2401 alloc_netdev_mqs(sizeof_priv, name, setup, count, count)
2402
Linus Torvalds1da177e2005-04-16 15:20:36 -07002403extern int register_netdev(struct net_device *dev);
2404extern void unregister_netdev(struct net_device *dev);
Jiri Pirkof001fde2009-05-05 02:48:28 +00002405
Jiri Pirko22bedad32010-04-01 21:22:57 +00002406/* General hardware address lists handling functions */
2407extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list,
2408 struct netdev_hw_addr_list *from_list,
2409 int addr_len, unsigned char addr_type);
2410extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list,
2411 struct netdev_hw_addr_list *from_list,
2412 int addr_len, unsigned char addr_type);
2413extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
2414 struct netdev_hw_addr_list *from_list,
2415 int addr_len);
2416extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
2417 struct netdev_hw_addr_list *from_list,
2418 int addr_len);
2419extern void __hw_addr_flush(struct netdev_hw_addr_list *list);
2420extern void __hw_addr_init(struct netdev_hw_addr_list *list);
2421
Jiri Pirkof001fde2009-05-05 02:48:28 +00002422/* Functions used for device addresses handling */
2423extern int dev_addr_add(struct net_device *dev, unsigned char *addr,
2424 unsigned char addr_type);
2425extern int dev_addr_del(struct net_device *dev, unsigned char *addr,
2426 unsigned char addr_type);
2427extern int dev_addr_add_multiple(struct net_device *to_dev,
2428 struct net_device *from_dev,
2429 unsigned char addr_type);
2430extern int dev_addr_del_multiple(struct net_device *to_dev,
2431 struct net_device *from_dev,
2432 unsigned char addr_type);
Jiri Pirkoa748ee22010-04-01 21:22:09 +00002433extern void dev_addr_flush(struct net_device *dev);
2434extern int dev_addr_init(struct net_device *dev);
2435
2436/* Functions used for unicast addresses handling */
2437extern int dev_uc_add(struct net_device *dev, unsigned char *addr);
2438extern int dev_uc_del(struct net_device *dev, unsigned char *addr);
2439extern int dev_uc_sync(struct net_device *to, struct net_device *from);
2440extern void dev_uc_unsync(struct net_device *to, struct net_device *from);
2441extern void dev_uc_flush(struct net_device *dev);
2442extern void dev_uc_init(struct net_device *dev);
Jiri Pirkof001fde2009-05-05 02:48:28 +00002443
Jiri Pirko22bedad32010-04-01 21:22:57 +00002444/* Functions used for multicast addresses handling */
2445extern int dev_mc_add(struct net_device *dev, unsigned char *addr);
2446extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr);
2447extern int dev_mc_del(struct net_device *dev, unsigned char *addr);
2448extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr);
2449extern int dev_mc_sync(struct net_device *to, struct net_device *from);
2450extern void dev_mc_unsync(struct net_device *to, struct net_device *from);
2451extern void dev_mc_flush(struct net_device *dev);
2452extern void dev_mc_init(struct net_device *dev);
Herbert Xufb286bb2005-11-10 13:01:24 -08002453
2454/* Functions used for secondary unicast and multicast support */
2455extern void dev_set_rx_mode(struct net_device *dev);
2456extern void __dev_set_rx_mode(struct net_device *dev);
Herbert Xufb286bb2005-11-10 13:01:24 -08002457extern int dev_set_promiscuity(struct net_device *dev, int inc);
2458extern int dev_set_allmulti(struct net_device *dev, int inc);
2459extern void netdev_state_change(struct net_device *dev);
Jiri Pirko3ca5b402010-03-10 10:29:35 +00002460extern int netdev_bonding_change(struct net_device *dev,
Moni Shoua75c78502009-09-15 02:37:40 -07002461 unsigned long event);
Herbert Xufb286bb2005-11-10 13:01:24 -08002462extern void netdev_features_change(struct net_device *dev);
2463/* Load a device via the kmod */
2464extern void dev_load(struct net *net, const char *name);
2465extern void dev_mcast_init(void);
Ben Hutchingsd7753512010-07-09 09:12:41 +00002466extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
2467 struct rtnl_link_stats64 *storage);
Herbert Xufb286bb2005-11-10 13:01:24 -08002468
2469extern int netdev_max_backlog;
Eric Dumazet3b098e22010-05-15 23:57:10 -07002470extern int netdev_tstamp_prequeue;
Herbert Xufb286bb2005-11-10 13:01:24 -08002471extern int weight_p;
Eric Dumazet0a148422011-04-20 09:27:32 +00002472extern int bpf_jit_enable;
Herbert Xufb286bb2005-11-10 13:01:24 -08002473extern int netdev_set_master(struct net_device *dev, struct net_device *master);
Jiri Pirko1765a572011-02-12 06:48:36 +00002474extern int netdev_set_bond_master(struct net_device *dev,
2475 struct net_device *master);
Herbert Xufb286bb2005-11-10 13:01:24 -08002476extern int skb_checksum_help(struct sk_buff *skb);
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002477extern struct sk_buff *skb_gso_segment(struct sk_buff *skb,
2478 netdev_features_t features);
Herbert Xufb286bb2005-11-10 13:01:24 -08002479#ifdef CONFIG_BUG
2480extern void netdev_rx_csum_fault(struct net_device *dev);
2481#else
2482static inline void netdev_rx_csum_fault(struct net_device *dev)
2483{
2484}
2485#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486/* rx skb timestamps */
2487extern void net_enable_timestamp(void);
2488extern void net_disable_timestamp(void);
2489
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03002490#ifdef CONFIG_PROC_FS
2491extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
2492extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
2493extern void dev_seq_stop(struct seq_file *seq, void *v);
2494#endif
2495
Jay Vosburghb8a97872008-06-13 18:12:04 -07002496extern int netdev_class_create_file(struct class_attribute *class_attr);
2497extern void netdev_class_remove_file(struct class_attribute *class_attr);
2498
Johannes Berg04600792010-08-05 17:45:15 +02002499extern struct kobj_ns_type_operations net_ns_type_operations;
2500
David S. Miller3019de12011-06-06 16:41:33 -07002501extern const char *netdev_drivername(const struct net_device *dev);
Arjan van de Ven6579e572008-07-21 13:31:48 -07002502
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03002503extern void linkwatch_run_queue(void);
2504
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002505static inline netdev_features_t netdev_get_wanted_features(
2506 struct net_device *dev)
Michał Mirosław5455c692011-02-15 16:59:17 +00002507{
2508 return (dev->features & ~dev->hw_features) | dev->wanted_features;
2509}
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002510netdev_features_t netdev_increment_features(netdev_features_t all,
2511 netdev_features_t one, netdev_features_t mask);
Michał Mirosław6cb6a272011-04-02 22:48:47 -07002512int __netdev_update_features(struct net_device *dev);
Michał Mirosław5455c692011-02-15 16:59:17 +00002513void netdev_update_features(struct net_device *dev);
Michał Mirosławafe12cc2011-05-07 03:22:17 +00002514void netdev_change_features(struct net_device *dev);
Herbert Xu7f353bf2007-08-10 15:47:58 -07002515
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08002516void netif_stacked_transfer_operstate(const struct net_device *rootdev,
2517 struct net_device *dev);
2518
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002519netdev_features_t netif_skb_features(struct sk_buff *skb);
Jesse Gross58e998c2010-10-29 12:14:55 +00002520
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002521static inline int net_gso_ok(netdev_features_t features, int gso_type)
Herbert Xubcd76112006-06-30 13:36:35 -07002522{
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002523 netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT;
Michał Mirosław0345e182011-11-16 14:05:33 +00002524
2525 /* check flags correspondence */
2526 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
2527 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT));
2528 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
2529 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
2530 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
2531 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
2532
Herbert Xubcd76112006-06-30 13:36:35 -07002533 return (features & feature) == feature;
2534}
2535
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002536static inline int skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
Herbert Xu576a30e2006-06-27 13:22:38 -07002537{
Herbert Xu278b2512009-06-03 21:20:51 -07002538 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
David S. Miller21dc3302010-08-23 00:13:46 -07002539 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
Herbert Xu576a30e2006-06-27 13:22:38 -07002540}
2541
Michał Mirosławc8f44af2011-11-15 15:29:55 +00002542static inline int netif_needs_gso(struct sk_buff *skb,
2543 netdev_features_t features)
Herbert Xu79671682006-06-22 02:40:14 -07002544{
Jesse Grossfc741212011-01-09 06:23:32 +00002545 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
2546 unlikely(skb->ip_summed != CHECKSUM_PARTIAL));
Herbert Xu79671682006-06-22 02:40:14 -07002547}
2548
Peter P Waskiewicz Jr82cc1a72008-03-21 03:43:19 -07002549static inline void netif_set_gso_max_size(struct net_device *dev,
2550 unsigned int size)
2551{
2552 dev->gso_max_size = size;
2553}
2554
Jiri Pirko1765a572011-02-12 06:48:36 +00002555static inline int netif_is_bond_slave(struct net_device *dev)
2556{
2557 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
2558}
2559
Eric W. Biederman505d4f72008-11-07 22:54:20 -08002560extern struct pernet_operations __net_initdata loopback_net_ops;
Patrick McHardyb1b67dd2009-04-20 04:49:28 +00002561
Joe Perches571ba422010-02-09 11:49:47 +00002562/* Logging, debugging and troubleshooting/diagnostic helpers. */
2563
2564/* netdev_printk helpers, similar to dev_printk */
2565
2566static inline const char *netdev_name(const struct net_device *dev)
2567{
2568 if (dev->reg_state != NETREG_REGISTERED)
2569 return "(unregistered net_device)";
2570 return dev->name;
2571}
2572
Jason Baronffa10cb2011-08-11 14:36:48 -04002573extern int __netdev_printk(const char *level, const struct net_device *dev,
2574 struct va_format *vaf);
2575
Joe Perchesb9075fa2011-10-31 17:11:33 -07002576extern __printf(3, 4)
2577int netdev_printk(const char *level, const struct net_device *dev,
2578 const char *format, ...);
2579extern __printf(2, 3)
2580int netdev_emerg(const struct net_device *dev, const char *format, ...);
2581extern __printf(2, 3)
2582int netdev_alert(const struct net_device *dev, const char *format, ...);
2583extern __printf(2, 3)
2584int netdev_crit(const struct net_device *dev, const char *format, ...);
2585extern __printf(2, 3)
2586int netdev_err(const struct net_device *dev, const char *format, ...);
2587extern __printf(2, 3)
2588int netdev_warn(const struct net_device *dev, const char *format, ...);
2589extern __printf(2, 3)
2590int netdev_notice(const struct net_device *dev, const char *format, ...);
2591extern __printf(2, 3)
2592int netdev_info(const struct net_device *dev, const char *format, ...);
Joe Perches571ba422010-02-09 11:49:47 +00002593
Vasiliy Kulikov8909c9a2011-03-02 00:33:13 +03002594#define MODULE_ALIAS_NETDEV(device) \
2595 MODULE_ALIAS("netdev-" device)
2596
Joe Perches571ba422010-02-09 11:49:47 +00002597#if defined(DEBUG)
2598#define netdev_dbg(__dev, format, args...) \
2599 netdev_printk(KERN_DEBUG, __dev, format, ##args)
2600#elif defined(CONFIG_DYNAMIC_DEBUG)
2601#define netdev_dbg(__dev, format, args...) \
2602do { \
Jason Baronffa10cb2011-08-11 14:36:48 -04002603 dynamic_netdev_dbg(__dev, format, ##args); \
Joe Perches571ba422010-02-09 11:49:47 +00002604} while (0)
2605#else
2606#define netdev_dbg(__dev, format, args...) \
2607({ \
2608 if (0) \
2609 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
2610 0; \
2611})
2612#endif
2613
2614#if defined(VERBOSE_DEBUG)
2615#define netdev_vdbg netdev_dbg
2616#else
2617
2618#define netdev_vdbg(dev, format, args...) \
2619({ \
2620 if (0) \
2621 netdev_printk(KERN_DEBUG, dev, format, ##args); \
2622 0; \
2623})
2624#endif
2625
2626/*
2627 * netdev_WARN() acts like dev_printk(), but with the key difference
2628 * of using a WARN/WARN_ON to get the message out, including the
2629 * file/line information and a backtrace.
2630 */
2631#define netdev_WARN(dev, format, args...) \
2632 WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args);
2633
Joe Perchesb3d95c52010-02-09 11:49:49 +00002634/* netif printk helpers, similar to netdev_printk */
2635
2636#define netif_printk(priv, type, level, dev, fmt, args...) \
2637do { \
2638 if (netif_msg_##type(priv)) \
2639 netdev_printk(level, (dev), fmt, ##args); \
2640} while (0)
2641
Joe Perchesf45f4322010-06-27 01:02:36 +00002642#define netif_level(level, priv, type, dev, fmt, args...) \
2643do { \
2644 if (netif_msg_##type(priv)) \
2645 netdev_##level(dev, fmt, ##args); \
2646} while (0)
2647
Joe Perchesb3d95c52010-02-09 11:49:49 +00002648#define netif_emerg(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002649 netif_level(emerg, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002650#define netif_alert(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002651 netif_level(alert, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002652#define netif_crit(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002653 netif_level(crit, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002654#define netif_err(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002655 netif_level(err, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002656#define netif_warn(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002657 netif_level(warn, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002658#define netif_notice(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002659 netif_level(notice, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002660#define netif_info(priv, type, dev, fmt, args...) \
Joe Perchesf45f4322010-06-27 01:02:36 +00002661 netif_level(info, priv, type, dev, fmt, ##args)
Joe Perchesb3d95c52010-02-09 11:49:49 +00002662
2663#if defined(DEBUG)
2664#define netif_dbg(priv, type, dev, format, args...) \
2665 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
2666#elif defined(CONFIG_DYNAMIC_DEBUG)
2667#define netif_dbg(priv, type, netdev, format, args...) \
2668do { \
2669 if (netif_msg_##type(priv)) \
Jason Baronb5fb0a02011-08-11 14:36:53 -04002670 dynamic_netdev_dbg(netdev, format, ##args); \
Joe Perchesb3d95c52010-02-09 11:49:49 +00002671} while (0)
2672#else
2673#define netif_dbg(priv, type, dev, format, args...) \
2674({ \
2675 if (0) \
2676 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
2677 0; \
2678})
2679#endif
2680
2681#if defined(VERBOSE_DEBUG)
Ben Hutchingsbcfcc452010-07-02 07:08:44 +00002682#define netif_vdbg netif_dbg
Joe Perchesb3d95c52010-02-09 11:49:49 +00002683#else
2684#define netif_vdbg(priv, type, dev, format, args...) \
2685({ \
2686 if (0) \
Ben Hutchingsa4ed89c2010-05-18 06:56:32 +00002687 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
Joe Perchesb3d95c52010-02-09 11:49:49 +00002688 0; \
2689})
2690#endif
Joe Perches571ba422010-02-09 11:49:47 +00002691
Linus Torvalds1da177e2005-04-16 15:20:36 -07002692#endif /* __KERNEL__ */
2693
Jiri Pirko385a1542009-05-27 15:48:07 -07002694#endif /* _LINUX_NETDEVICE_H */