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1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Definitions for the Interfaces handler. | |
7 | * | |
8 | * Version: @(#)dev.h 1.0.10 08/12/93 | |
9 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> | |
13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> | |
113aa838 | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
15 | * Bjorn Ekwall. <bj0rn@blox.se> |
16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | * | |
23 | * Moved to /usr/include/linux for NET3 | |
24 | */ | |
25 | #ifndef _LINUX_NETDEVICE_H | |
26 | #define _LINUX_NETDEVICE_H | |
27 | ||
e8db0be1 | 28 | #include <linux/pm_qos.h> |
d7fe0f24 | 29 | #include <linux/timer.h> |
187f1882 | 30 | #include <linux/bug.h> |
bea3348e | 31 | #include <linux/delay.h> |
60063497 | 32 | #include <linux/atomic.h> |
1da177e4 LT |
33 | #include <asm/cache.h> |
34 | #include <asm/byteorder.h> | |
35 | ||
1da177e4 | 36 | #include <linux/percpu.h> |
4d5b78c0 | 37 | #include <linux/rculist.h> |
db217334 | 38 | #include <linux/dmaengine.h> |
bea3348e | 39 | #include <linux/workqueue.h> |
114cf580 | 40 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 41 | |
b1b67dd4 | 42 | #include <linux/ethtool.h> |
a050c33f | 43 | #include <net/net_namespace.h> |
cf85d08f | 44 | #include <net/dsa.h> |
7a6b6f51 | 45 | #ifdef CONFIG_DCB |
2f90b865 AD |
46 | #include <net/dcbnl.h> |
47 | #endif | |
5bc1421e | 48 | #include <net/netprio_cgroup.h> |
a050c33f | 49 | |
a59e2ecb | 50 | #include <linux/netdev_features.h> |
77162022 | 51 | #include <linux/neighbour.h> |
607ca46e | 52 | #include <uapi/linux/netdevice.h> |
a59e2ecb | 53 | |
115c1d6e | 54 | struct netpoll_info; |
313162d0 | 55 | struct device; |
c1f19b51 | 56 | struct phy_device; |
704232c2 JB |
57 | /* 802.11 specific */ |
58 | struct wireless_dev; | |
1da177e4 LT |
59 | /* source back-compat hooks */ |
60 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
61 | ( (netdev)->ethtool_ops = (ops) ) | |
62 | ||
d07d7507 SG |
63 | extern void netdev_set_default_ethtool_ops(struct net_device *dev, |
64 | const struct ethtool_ops *ops); | |
65 | ||
c1f79426 SA |
66 | /* 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 */ | |
fbdeca2d JP |
70 | #define NET_ADDR_SET 3 /* address is set using |
71 | * dev_set_mac_address() */ | |
c1f79426 | 72 | |
9a1654ba JP |
73 | /* Backlog congestion levels */ |
74 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
75 | #define NET_RX_DROP 1 /* packet dropped */ | |
76 | ||
572a9d7b PM |
77 | /* |
78 | * Transmit return codes: transmit return codes originate from three different | |
79 | * namespaces: | |
80 | * | |
81 | * - qdisc return codes | |
82 | * - driver transmit return codes | |
83 | * - errno values | |
84 | * | |
85 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
86 | * function. Real network devices commonly used with qdiscs should only return | |
87 | * the driver transmit return codes though - when qdiscs are used, the actual | |
88 | * transmission happens asynchronously, so the value is not propagated to | |
89 | * higher layers. Virtual network devices transmit synchronously, in this case | |
90 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
91 | * others are propagated to higher layers. | |
92 | */ | |
93 | ||
94 | /* qdisc ->enqueue() return codes. */ | |
95 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
96 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
97 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
98 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
99 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 100 | |
b9df3cb8 GR |
101 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
102 | * indicates that the device will soon be dropping packets, or already drops | |
103 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 104 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
105 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
106 | ||
dc1f8bf6 | 107 | /* Driver transmit return codes */ |
9a1654ba | 108 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 109 | |
dc1f8bf6 | 110 | enum netdev_tx { |
572a9d7b | 111 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
112 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
113 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
114 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
115 | }; |
116 | typedef enum netdev_tx netdev_tx_t; | |
117 | ||
9a1654ba JP |
118 | /* |
119 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
120 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
121 | */ | |
122 | static inline bool dev_xmit_complete(int rc) | |
123 | { | |
124 | /* | |
125 | * Positive cases with an skb consumed by a driver: | |
126 | * - successful transmission (rc == NETDEV_TX_OK) | |
127 | * - error while transmitting (rc < 0) | |
128 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
129 | */ | |
130 | if (likely(rc < NET_XMIT_MASK)) | |
131 | return true; | |
132 | ||
133 | return false; | |
134 | } | |
135 | ||
1da177e4 LT |
136 | /* |
137 | * Compute the worst case header length according to the protocols | |
138 | * used. | |
139 | */ | |
fe2918b0 | 140 | |
d11ead75 | 141 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
8388e3da DM |
142 | # if defined(CONFIG_MAC80211_MESH) |
143 | # define LL_MAX_HEADER 128 | |
144 | # else | |
145 | # define LL_MAX_HEADER 96 | |
146 | # endif | |
1da177e4 | 147 | #else |
8388e3da | 148 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
149 | #endif |
150 | ||
d11ead75 BH |
151 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
152 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
153 | #define MAX_HEADER LL_MAX_HEADER |
154 | #else | |
155 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
156 | #endif | |
157 | ||
158 | /* | |
be1f3c2c BH |
159 | * Old network device statistics. Fields are native words |
160 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 161 | */ |
fe2918b0 | 162 | |
d94d9fee | 163 | struct net_device_stats { |
3cfde79c BH |
164 | unsigned long rx_packets; |
165 | unsigned long tx_packets; | |
166 | unsigned long rx_bytes; | |
167 | unsigned long tx_bytes; | |
168 | unsigned long rx_errors; | |
169 | unsigned long tx_errors; | |
170 | unsigned long rx_dropped; | |
171 | unsigned long tx_dropped; | |
172 | unsigned long multicast; | |
1da177e4 | 173 | unsigned long collisions; |
1da177e4 | 174 | unsigned long rx_length_errors; |
3cfde79c BH |
175 | unsigned long rx_over_errors; |
176 | unsigned long rx_crc_errors; | |
177 | unsigned long rx_frame_errors; | |
178 | unsigned long rx_fifo_errors; | |
179 | unsigned long rx_missed_errors; | |
1da177e4 LT |
180 | unsigned long tx_aborted_errors; |
181 | unsigned long tx_carrier_errors; | |
182 | unsigned long tx_fifo_errors; | |
183 | unsigned long tx_heartbeat_errors; | |
184 | unsigned long tx_window_errors; | |
1da177e4 LT |
185 | unsigned long rx_compressed; |
186 | unsigned long tx_compressed; | |
187 | }; | |
188 | ||
1da177e4 LT |
189 | |
190 | #include <linux/cache.h> | |
191 | #include <linux/skbuff.h> | |
192 | ||
adc9300e | 193 | #ifdef CONFIG_RPS |
c5905afb IM |
194 | #include <linux/static_key.h> |
195 | extern struct static_key rps_needed; | |
adc9300e ED |
196 | #endif |
197 | ||
1da177e4 LT |
198 | struct neighbour; |
199 | struct neigh_parms; | |
200 | struct sk_buff; | |
201 | ||
f001fde5 JP |
202 | struct netdev_hw_addr { |
203 | struct list_head list; | |
204 | unsigned char addr[MAX_ADDR_LEN]; | |
205 | unsigned char type; | |
ccffad25 JP |
206 | #define NETDEV_HW_ADDR_T_LAN 1 |
207 | #define NETDEV_HW_ADDR_T_SAN 2 | |
208 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
209 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 210 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 211 | bool global_use; |
4cd729b0 | 212 | int sync_cnt; |
8f8f103d | 213 | int refcount; |
4543fbef | 214 | int synced; |
f001fde5 JP |
215 | struct rcu_head rcu_head; |
216 | }; | |
217 | ||
31278e71 JP |
218 | struct netdev_hw_addr_list { |
219 | struct list_head list; | |
220 | int count; | |
221 | }; | |
222 | ||
22bedad3 JP |
223 | #define netdev_hw_addr_list_count(l) ((l)->count) |
224 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
225 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
226 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 227 | |
22bedad3 JP |
228 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
229 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
230 | #define netdev_for_each_uc_addr(ha, dev) \ | |
231 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 232 | |
22bedad3 JP |
233 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
234 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 235 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 236 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 237 | |
d94d9fee | 238 | struct hh_cache { |
f6b72b62 | 239 | u16 hh_len; |
5c25f686 | 240 | u16 __pad; |
3644f0ce | 241 | seqlock_t hh_lock; |
1da177e4 LT |
242 | |
243 | /* cached hardware header; allow for machine alignment needs. */ | |
244 | #define HH_DATA_MOD 16 | |
245 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 246 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
247 | #define HH_DATA_ALIGN(__len) \ |
248 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
249 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
250 | }; | |
251 | ||
252 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
253 | * Alternative is: | |
254 | * dev->hard_header_len ? (dev->hard_header_len + | |
255 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
256 | * | |
257 | * We could use other alignment values, but we must maintain the | |
258 | * relationship HH alignment <= LL alignment. | |
259 | */ | |
260 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 261 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 262 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 263 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 264 | |
3b04ddde SH |
265 | struct header_ops { |
266 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
267 | unsigned short type, const void *daddr, | |
95c96174 | 268 | const void *saddr, unsigned int len); |
3b04ddde SH |
269 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
270 | int (*rebuild)(struct sk_buff *skb); | |
e69dd336 | 271 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
272 | void (*cache_update)(struct hh_cache *hh, |
273 | const struct net_device *dev, | |
274 | const unsigned char *haddr); | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | /* These flag bits are private to the generic network queueing |
278 | * layer, they may not be explicitly referenced by any other | |
279 | * code. | |
280 | */ | |
281 | ||
d94d9fee | 282 | enum netdev_state_t { |
1da177e4 LT |
283 | __LINK_STATE_START, |
284 | __LINK_STATE_PRESENT, | |
1da177e4 | 285 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
286 | __LINK_STATE_LINKWATCH_PENDING, |
287 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
288 | }; |
289 | ||
290 | ||
291 | /* | |
292 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 293 | * are then used in the device probing. |
1da177e4 LT |
294 | */ |
295 | struct netdev_boot_setup { | |
296 | char name[IFNAMSIZ]; | |
297 | struct ifmap map; | |
298 | }; | |
299 | #define NETDEV_BOOT_SETUP_MAX 8 | |
300 | ||
20380731 | 301 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 302 | |
bea3348e SH |
303 | /* |
304 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
305 | */ | |
306 | struct napi_struct { | |
307 | /* The poll_list must only be managed by the entity which | |
308 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
309 | * whoever atomically sets that bit can add this napi_struct | |
310 | * to the per-cpu poll_list, and whoever clears that bit | |
311 | * can remove from the list right before clearing the bit. | |
312 | */ | |
313 | struct list_head poll_list; | |
314 | ||
315 | unsigned long state; | |
316 | int weight; | |
404f7c9e | 317 | unsigned int gro_count; |
bea3348e SH |
318 | int (*poll)(struct napi_struct *, int); |
319 | #ifdef CONFIG_NETPOLL | |
320 | spinlock_t poll_lock; | |
321 | int poll_owner; | |
bea3348e | 322 | #endif |
5d38a079 | 323 | struct net_device *dev; |
d565b0a1 | 324 | struct sk_buff *gro_list; |
5d38a079 | 325 | struct sk_buff *skb; |
404f7c9e | 326 | struct list_head dev_list; |
af12fa6e ET |
327 | struct hlist_node napi_hash_node; |
328 | unsigned int napi_id; | |
bea3348e SH |
329 | }; |
330 | ||
d94d9fee | 331 | enum { |
bea3348e | 332 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 333 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 334 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
af12fa6e | 335 | NAPI_STATE_HASHED, /* In NAPI hash */ |
bea3348e SH |
336 | }; |
337 | ||
5b252f0c | 338 | enum gro_result { |
d1c76af9 HX |
339 | GRO_MERGED, |
340 | GRO_MERGED_FREE, | |
341 | GRO_HELD, | |
342 | GRO_NORMAL, | |
343 | GRO_DROP, | |
344 | }; | |
5b252f0c | 345 | typedef enum gro_result gro_result_t; |
d1c76af9 | 346 | |
8a4eb573 JP |
347 | /* |
348 | * enum rx_handler_result - Possible return values for rx_handlers. | |
349 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
350 | * further. | |
351 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
352 | * case skb->dev was changed by rx_handler. | |
353 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
354 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
355 | * | |
356 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
357 | * special processing of the skb, prior to delivery to protocol handlers. | |
358 | * | |
359 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
360 | * to register a second rx_handler will return -EBUSY. | |
361 | * | |
362 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
363 | * To unregister a rx_handler on a net_device, use | |
364 | * netdev_rx_handler_unregister(). | |
365 | * | |
366 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
367 | * do with the skb. | |
368 | * | |
369 | * If the rx_handler consumed to skb in some way, it should return | |
370 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
371 | * the skb to be delivered in some other ways. | |
372 | * | |
373 | * If the rx_handler changed skb->dev, to divert the skb to another | |
374 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
375 | * new device will be called if it exists. | |
376 | * | |
377 | * If the rx_handler consider the skb should be ignored, it should return | |
378 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
d93cf068 | 379 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 JP |
380 | * |
381 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
382 | * delivered, it should return RX_HANDLER_PASS. | |
383 | * | |
384 | * A device without a registered rx_handler will behave as if rx_handler | |
385 | * returned RX_HANDLER_PASS. | |
386 | */ | |
387 | ||
388 | enum rx_handler_result { | |
389 | RX_HANDLER_CONSUMED, | |
390 | RX_HANDLER_ANOTHER, | |
391 | RX_HANDLER_EXACT, | |
392 | RX_HANDLER_PASS, | |
393 | }; | |
394 | typedef enum rx_handler_result rx_handler_result_t; | |
395 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 396 | |
b3c97528 | 397 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 398 | |
4d29515f | 399 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
400 | { |
401 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
402 | } | |
403 | ||
bea3348e SH |
404 | /** |
405 | * napi_schedule_prep - check if napi can be scheduled | |
406 | * @n: napi context | |
407 | * | |
408 | * Test if NAPI routine is already running, and if not mark | |
409 | * it as running. This is used as a condition variable | |
a0a46196 DM |
410 | * insure only one NAPI poll instance runs. We also make |
411 | * sure there is no pending NAPI disable. | |
bea3348e | 412 | */ |
4d29515f | 413 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 414 | { |
a0a46196 DM |
415 | return !napi_disable_pending(n) && |
416 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
417 | } |
418 | ||
419 | /** | |
420 | * napi_schedule - schedule NAPI poll | |
421 | * @n: napi context | |
422 | * | |
423 | * Schedule NAPI poll routine to be called if it is not already | |
424 | * running. | |
425 | */ | |
426 | static inline void napi_schedule(struct napi_struct *n) | |
427 | { | |
428 | if (napi_schedule_prep(n)) | |
429 | __napi_schedule(n); | |
430 | } | |
431 | ||
bfe13f54 | 432 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 433 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
434 | { |
435 | if (napi_schedule_prep(napi)) { | |
436 | __napi_schedule(napi); | |
4d29515f | 437 | return true; |
bfe13f54 | 438 | } |
4d29515f | 439 | return false; |
bfe13f54 RD |
440 | } |
441 | ||
bea3348e SH |
442 | /** |
443 | * napi_complete - NAPI processing complete | |
444 | * @n: napi context | |
445 | * | |
446 | * Mark NAPI processing as complete. | |
447 | */ | |
d565b0a1 HX |
448 | extern void __napi_complete(struct napi_struct *n); |
449 | extern void napi_complete(struct napi_struct *n); | |
bea3348e | 450 | |
af12fa6e ET |
451 | /** |
452 | * napi_by_id - lookup a NAPI by napi_id | |
453 | * @napi_id: hashed napi_id | |
454 | * | |
455 | * lookup @napi_id in napi_hash table | |
456 | * must be called under rcu_read_lock() | |
457 | */ | |
458 | extern struct napi_struct *napi_by_id(unsigned int napi_id); | |
459 | ||
460 | /** | |
461 | * napi_hash_add - add a NAPI to global hashtable | |
462 | * @napi: napi context | |
463 | * | |
464 | * generate a new napi_id and store a @napi under it in napi_hash | |
465 | */ | |
466 | extern void napi_hash_add(struct napi_struct *napi); | |
467 | ||
468 | /** | |
469 | * napi_hash_del - remove a NAPI from global table | |
470 | * @napi: napi context | |
471 | * | |
472 | * Warning: caller must observe rcu grace period | |
473 | * before freeing memory containing @napi | |
474 | */ | |
475 | extern void napi_hash_del(struct napi_struct *napi); | |
476 | ||
bea3348e SH |
477 | /** |
478 | * napi_disable - prevent NAPI from scheduling | |
479 | * @n: napi context | |
480 | * | |
481 | * Stop NAPI from being scheduled on this context. | |
482 | * Waits till any outstanding processing completes. | |
483 | */ | |
484 | static inline void napi_disable(struct napi_struct *n) | |
485 | { | |
a0a46196 | 486 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 487 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 488 | msleep(1); |
a0a46196 | 489 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
490 | } |
491 | ||
492 | /** | |
493 | * napi_enable - enable NAPI scheduling | |
494 | * @n: napi context | |
495 | * | |
496 | * Resume NAPI from being scheduled on this context. | |
497 | * Must be paired with napi_disable. | |
498 | */ | |
499 | static inline void napi_enable(struct napi_struct *n) | |
500 | { | |
501 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
502 | smp_mb__before_clear_bit(); | |
503 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
504 | } | |
505 | ||
c264c3de SH |
506 | #ifdef CONFIG_SMP |
507 | /** | |
508 | * napi_synchronize - wait until NAPI is not running | |
509 | * @n: napi context | |
510 | * | |
511 | * Wait until NAPI is done being scheduled on this context. | |
512 | * Waits till any outstanding processing completes but | |
513 | * does not disable future activations. | |
514 | */ | |
515 | static inline void napi_synchronize(const struct napi_struct *n) | |
516 | { | |
517 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
518 | msleep(1); | |
519 | } | |
520 | #else | |
521 | # define napi_synchronize(n) barrier() | |
522 | #endif | |
523 | ||
d94d9fee | 524 | enum netdev_queue_state_t { |
73466498 TH |
525 | __QUEUE_STATE_DRV_XOFF, |
526 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 527 | __QUEUE_STATE_FROZEN, |
73466498 TH |
528 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
529 | (1 << __QUEUE_STATE_STACK_XOFF)) | |
530 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
531 | (1 << __QUEUE_STATE_FROZEN)) | |
79d16385 | 532 | }; |
73466498 TH |
533 | /* |
534 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
535 | * netif_tx_* functions below are used to manipulate this flag. The | |
536 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
537 | * queue independently. The netif_xmit_*stopped functions below are called | |
538 | * to check if the queue has been stopped by the driver or stack (either | |
539 | * of the XOFF bits are set in the state). Drivers should not need to call | |
540 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
541 | */ | |
79d16385 | 542 | |
bb949fbd | 543 | struct netdev_queue { |
6a321cb3 ED |
544 | /* |
545 | * read mostly part | |
546 | */ | |
bb949fbd | 547 | struct net_device *dev; |
b0e1e646 DM |
548 | struct Qdisc *qdisc; |
549 | struct Qdisc *qdisc_sleeping; | |
ccf5ff69 | 550 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
551 | struct kobject kobj; |
552 | #endif | |
f2cd2d3e ED |
553 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
554 | int numa_node; | |
555 | #endif | |
6a321cb3 ED |
556 | /* |
557 | * write mostly part | |
558 | */ | |
559 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
560 | int xmit_lock_owner; | |
9d21493b ED |
561 | /* |
562 | * please use this field instead of dev->trans_start | |
563 | */ | |
564 | unsigned long trans_start; | |
ccf5ff69 | 565 | |
566 | /* | |
567 | * Number of TX timeouts for this queue | |
568 | * (/sys/class/net/DEV/Q/trans_timeout) | |
569 | */ | |
570 | unsigned long trans_timeout; | |
114cf580 TH |
571 | |
572 | unsigned long state; | |
573 | ||
574 | #ifdef CONFIG_BQL | |
575 | struct dql dql; | |
576 | #endif | |
e8a0464c | 577 | } ____cacheline_aligned_in_smp; |
bb949fbd | 578 | |
f2cd2d3e ED |
579 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
580 | { | |
581 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
582 | return q->numa_node; | |
583 | #else | |
b236da69 | 584 | return NUMA_NO_NODE; |
f2cd2d3e ED |
585 | #endif |
586 | } | |
587 | ||
588 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
589 | { | |
590 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
591 | q->numa_node = node; | |
592 | #endif | |
593 | } | |
594 | ||
df334545 | 595 | #ifdef CONFIG_RPS |
0a9627f2 TH |
596 | /* |
597 | * This structure holds an RPS map which can be of variable length. The | |
598 | * map is an array of CPUs. | |
599 | */ | |
600 | struct rps_map { | |
601 | unsigned int len; | |
602 | struct rcu_head rcu; | |
603 | u16 cpus[0]; | |
604 | }; | |
60b778ce | 605 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 606 | |
fec5e652 | 607 | /* |
c445477d BH |
608 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
609 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
610 | * a hardware filter index. | |
fec5e652 TH |
611 | */ |
612 | struct rps_dev_flow { | |
613 | u16 cpu; | |
c445477d | 614 | u16 filter; |
fec5e652 TH |
615 | unsigned int last_qtail; |
616 | }; | |
c445477d | 617 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
618 | |
619 | /* | |
620 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
621 | */ | |
622 | struct rps_dev_flow_table { | |
623 | unsigned int mask; | |
624 | struct rcu_head rcu; | |
fec5e652 TH |
625 | struct rps_dev_flow flows[0]; |
626 | }; | |
627 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 628 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
629 | |
630 | /* | |
631 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
632 | * on which they were processed by the application (set in recvmsg). | |
633 | */ | |
634 | struct rps_sock_flow_table { | |
635 | unsigned int mask; | |
636 | u16 ents[0]; | |
637 | }; | |
638 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
60b778ce | 639 | ((_num) * sizeof(u16))) |
fec5e652 TH |
640 | |
641 | #define RPS_NO_CPU 0xffff | |
642 | ||
643 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
644 | u32 hash) | |
645 | { | |
646 | if (table && hash) { | |
647 | unsigned int cpu, index = hash & table->mask; | |
648 | ||
649 | /* We only give a hint, preemption can change cpu under us */ | |
650 | cpu = raw_smp_processor_id(); | |
651 | ||
652 | if (table->ents[index] != cpu) | |
653 | table->ents[index] = cpu; | |
654 | } | |
655 | } | |
656 | ||
657 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
658 | u32 hash) | |
659 | { | |
660 | if (table && hash) | |
661 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
662 | } | |
663 | ||
6e3f7faf | 664 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
fec5e652 | 665 | |
c445477d BH |
666 | #ifdef CONFIG_RFS_ACCEL |
667 | extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, | |
668 | u32 flow_id, u16 filter_id); | |
669 | #endif | |
670 | ||
0a9627f2 TH |
671 | /* This structure contains an instance of an RX queue. */ |
672 | struct netdev_rx_queue { | |
6e3f7faf ED |
673 | struct rps_map __rcu *rps_map; |
674 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
675 | struct kobject kobj; | |
fe822240 | 676 | struct net_device *dev; |
0a9627f2 | 677 | } ____cacheline_aligned_in_smp; |
fec5e652 | 678 | #endif /* CONFIG_RPS */ |
d314774c | 679 | |
bf264145 TH |
680 | #ifdef CONFIG_XPS |
681 | /* | |
682 | * This structure holds an XPS map which can be of variable length. The | |
683 | * map is an array of queues. | |
684 | */ | |
685 | struct xps_map { | |
686 | unsigned int len; | |
687 | unsigned int alloc_len; | |
688 | struct rcu_head rcu; | |
689 | u16 queues[0]; | |
690 | }; | |
60b778ce | 691 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
bf264145 TH |
692 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
693 | / sizeof(u16)) | |
694 | ||
695 | /* | |
696 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
697 | */ | |
698 | struct xps_dev_maps { | |
699 | struct rcu_head rcu; | |
a4177869 | 700 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
701 | }; |
702 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
703 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
704 | #endif /* CONFIG_XPS */ | |
705 | ||
4f57c087 JF |
706 | #define TC_MAX_QUEUE 16 |
707 | #define TC_BITMASK 15 | |
708 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
709 | struct netdev_tc_txq { | |
710 | u16 count; | |
711 | u16 offset; | |
712 | }; | |
713 | ||
68bad94e NP |
714 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
715 | /* | |
716 | * This structure is to hold information about the device | |
717 | * configured to run FCoE protocol stack. | |
718 | */ | |
719 | struct netdev_fcoe_hbainfo { | |
720 | char manufacturer[64]; | |
721 | char serial_number[64]; | |
722 | char hardware_version[64]; | |
723 | char driver_version[64]; | |
724 | char optionrom_version[64]; | |
725 | char firmware_version[64]; | |
726 | char model[256]; | |
727 | char model_description[256]; | |
728 | }; | |
729 | #endif | |
730 | ||
d314774c SH |
731 | /* |
732 | * This structure defines the management hooks for network devices. | |
00829823 SH |
733 | * The following hooks can be defined; unless noted otherwise, they are |
734 | * optional and can be filled with a null pointer. | |
d314774c SH |
735 | * |
736 | * int (*ndo_init)(struct net_device *dev); | |
737 | * This function is called once when network device is registered. | |
738 | * The network device can use this to any late stage initializaton | |
739 | * or semantic validattion. It can fail with an error code which will | |
740 | * be propogated back to register_netdev | |
741 | * | |
742 | * void (*ndo_uninit)(struct net_device *dev); | |
743 | * This function is called when device is unregistered or when registration | |
744 | * fails. It is not called if init fails. | |
745 | * | |
746 | * int (*ndo_open)(struct net_device *dev); | |
747 | * This function is called when network device transistions to the up | |
748 | * state. | |
749 | * | |
750 | * int (*ndo_stop)(struct net_device *dev); | |
751 | * This function is called when network device transistions to the down | |
752 | * state. | |
753 | * | |
dc1f8bf6 SH |
754 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
755 | * struct net_device *dev); | |
00829823 | 756 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
757 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
758 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
759 | * Required can not be NULL. |
760 | * | |
761 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
762 | * Called to decide which queue to when device supports multiple | |
763 | * transmit queues. | |
764 | * | |
d314774c SH |
765 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
766 | * This function is called to allow device receiver to make | |
767 | * changes to configuration when multicast or promiscious is enabled. | |
768 | * | |
769 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
770 | * This function is called device changes address list filtering. | |
01789349 JP |
771 | * If driver handles unicast address filtering, it should set |
772 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
773 | * |
774 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
775 | * This function is called when the Media Access Control address | |
37b607c5 | 776 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
777 | * mac address can not be changed. |
778 | * | |
779 | * int (*ndo_validate_addr)(struct net_device *dev); | |
780 | * Test if Media Access Control address is valid for the device. | |
781 | * | |
782 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
783 | * Called when a user request an ioctl which can't be handled by | |
784 | * the generic interface code. If not defined ioctl's return | |
785 | * not supported error code. | |
786 | * | |
787 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
788 | * Used to set network devices bus interface parameters. This interface | |
789 | * is retained for legacy reason, new devices should use the bus | |
790 | * interface (PCI) for low level management. | |
791 | * | |
792 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
793 | * Called when a user wants to change the Maximum Transfer Unit | |
794 | * of a device. If not defined, any request to change MTU will | |
795 | * will return an error. | |
796 | * | |
00829823 | 797 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
798 | * Callback uses when the transmitter has not made any progress |
799 | * for dev->watchdog ticks. | |
800 | * | |
3cfde79c | 801 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 802 | * struct rtnl_link_stats64 *storage); |
d308e38f | 803 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 804 | * Called when a user wants to get the network device usage |
be1f3c2c | 805 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
806 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
807 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 808 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
809 | * (which should normally be dev->stats) and return a pointer to |
810 | * it. The structure may be changed asynchronously only if each | |
811 | * field is written atomically. | |
812 | * 3. Update dev->stats asynchronously and atomically, and define | |
813 | * neither operation. | |
d314774c | 814 | * |
80d5c368 PM |
815 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
816 | * If device support VLAN filtering this function is called when a | |
817 | * VLAN id is registered. | |
d314774c | 818 | * |
8e586137 | 819 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
80d5c368 PM |
820 | * If device support VLAN filtering this function is called when a |
821 | * VLAN id is unregistered. | |
d314774c SH |
822 | * |
823 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
824 | * |
825 | * SR-IOV management functions. | |
826 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
827 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
828 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
5f8444a3 | 829 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
830 | * int (*ndo_get_vf_config)(struct net_device *dev, |
831 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 832 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
833 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
834 | * struct nlattr *port[]); | |
835 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
836 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
837 | * Called to setup 'tc' number of traffic classes in the net device. This | |
838 | * is always called from the stack with the rtnl lock held and netif tx | |
839 | * queues stopped. This allows the netdevice to perform queue management | |
840 | * safely. | |
c445477d | 841 | * |
e9bce845 YZ |
842 | * Fiber Channel over Ethernet (FCoE) offload functions. |
843 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
844 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
845 | * so the underlying device can perform whatever needed configuration or | |
846 | * initialization to support acceleration of FCoE traffic. | |
847 | * | |
848 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
849 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
850 | * so the underlying device can perform whatever needed clean-ups to | |
851 | * stop supporting acceleration of FCoE traffic. | |
852 | * | |
853 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
854 | * struct scatterlist *sgl, unsigned int sgc); | |
855 | * Called when the FCoE Initiator wants to initialize an I/O that | |
856 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
857 | * perform necessary setup and returns 1 to indicate the device is set up | |
858 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
859 | * | |
860 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
861 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
862 | * indicated by the FC exchange id 'xid', so the underlying device can | |
863 | * clean up and reuse resources for later DDP requests. | |
864 | * | |
865 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
866 | * struct scatterlist *sgl, unsigned int sgc); | |
867 | * Called when the FCoE Target wants to initialize an I/O that | |
868 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
869 | * perform necessary setup and returns 1 to indicate the device is set up | |
870 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
871 | * | |
68bad94e NP |
872 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
873 | * struct netdev_fcoe_hbainfo *hbainfo); | |
874 | * Called when the FCoE Protocol stack wants information on the underlying | |
875 | * device. This information is utilized by the FCoE protocol stack to | |
876 | * register attributes with Fiber Channel management service as per the | |
877 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
878 | * | |
e9bce845 YZ |
879 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
880 | * Called when the underlying device wants to override default World Wide | |
881 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
882 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
883 | * protocol stack to use. | |
884 | * | |
c445477d BH |
885 | * RFS acceleration. |
886 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
887 | * u16 rxq_index, u32 flow_id); | |
888 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
889 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
890 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 891 | * |
8b98a70c | 892 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
893 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
894 | * Called to make another netdev an underling. | |
895 | * | |
896 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
897 | * Called to release previously enslaved netdev. | |
5455c699 MM |
898 | * |
899 | * Feature/offload setting functions. | |
c8f44aff MM |
900 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
901 | * netdev_features_t features); | |
5455c699 MM |
902 | * Adjusts the requested feature flags according to device-specific |
903 | * constraints, and returns the resulting flags. Must not modify | |
904 | * the device state. | |
905 | * | |
c8f44aff | 906 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
907 | * Called to update device configuration to new features. Passed |
908 | * feature set might be less than what was returned by ndo_fix_features()). | |
909 | * Must return >0 or -errno if it changed dev->features itself. | |
910 | * | |
edc7d573 | 911 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
912 | * struct net_device *dev, | |
6b6e2725 | 913 | * const unsigned char *addr, u16 flags) |
77162022 | 914 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
915 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
916 | * struct net_device *dev, | |
6b6e2725 | 917 | * const unsigned char *addr) |
77162022 JF |
918 | * Deletes the FDB entry from dev coresponding to addr. |
919 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
920 | * struct net_device *dev, int idx) | |
921 | * Used to add FDB entries to dump requests. Implementers should add | |
922 | * entries to skb and update idx with the number of entries. | |
e5a55a89 JF |
923 | * |
924 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) | |
925 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, | |
24f11a5c | 926 | * struct net_device *dev, u32 filter_mask) |
4bf84c35 JP |
927 | * |
928 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
929 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
930 | * which do not represent real hardware may define this to allow their | |
931 | * userspace components to manage their virtual carrier state. Devices | |
932 | * that determine carrier state from physical hardware properties (eg | |
933 | * network cables) or protocol-dependent mechanisms (eg | |
934 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
d314774c SH |
935 | */ |
936 | struct net_device_ops { | |
937 | int (*ndo_init)(struct net_device *dev); | |
938 | void (*ndo_uninit)(struct net_device *dev); | |
939 | int (*ndo_open)(struct net_device *dev); | |
940 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 941 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
942 | struct net_device *dev); |
943 | u16 (*ndo_select_queue)(struct net_device *dev, | |
944 | struct sk_buff *skb); | |
d314774c SH |
945 | void (*ndo_change_rx_flags)(struct net_device *dev, |
946 | int flags); | |
d314774c | 947 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
948 | int (*ndo_set_mac_address)(struct net_device *dev, |
949 | void *addr); | |
d314774c | 950 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
951 | int (*ndo_do_ioctl)(struct net_device *dev, |
952 | struct ifreq *ifr, int cmd); | |
d314774c SH |
953 | int (*ndo_set_config)(struct net_device *dev, |
954 | struct ifmap *map); | |
00829823 SH |
955 | int (*ndo_change_mtu)(struct net_device *dev, |
956 | int new_mtu); | |
957 | int (*ndo_neigh_setup)(struct net_device *dev, | |
958 | struct neigh_parms *); | |
d314774c SH |
959 | void (*ndo_tx_timeout) (struct net_device *dev); |
960 | ||
28172739 ED |
961 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
962 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
963 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
964 | ||
8e586137 | 965 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 966 | __be16 proto, u16 vid); |
8e586137 | 967 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 968 | __be16 proto, u16 vid); |
d314774c | 969 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 970 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 971 | int (*ndo_netpoll_setup)(struct net_device *dev, |
47be03a2 AW |
972 | struct netpoll_info *info, |
973 | gfp_t gfp); | |
0e34e931 | 974 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 ET |
975 | #endif |
976 | #ifdef CONFIG_NET_LL_RX_POLL | |
8b80cda5 | 977 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 978 | #endif |
95c26df8 WM |
979 | int (*ndo_set_vf_mac)(struct net_device *dev, |
980 | int queue, u8 *mac); | |
981 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
982 | int queue, u16 vlan, u8 qos); | |
983 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
984 | int vf, int rate); | |
5f8444a3 GR |
985 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
986 | int vf, bool setting); | |
95c26df8 WM |
987 | int (*ndo_get_vf_config)(struct net_device *dev, |
988 | int vf, | |
989 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
990 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
991 | int vf, int link_state); | |
57b61080 SF |
992 | int (*ndo_set_vf_port)(struct net_device *dev, |
993 | int vf, | |
994 | struct nlattr *port[]); | |
995 | int (*ndo_get_vf_port)(struct net_device *dev, | |
996 | int vf, struct sk_buff *skb); | |
4f57c087 | 997 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
d11ead75 | 998 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
999 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1000 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1001 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1002 | u16 xid, | |
1003 | struct scatterlist *sgl, | |
1004 | unsigned int sgc); | |
1005 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1006 | u16 xid); | |
6247e086 YZ |
1007 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1008 | u16 xid, | |
1009 | struct scatterlist *sgl, | |
1010 | unsigned int sgc); | |
68bad94e NP |
1011 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1012 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1013 | #endif |
1014 | ||
d11ead75 | 1015 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1016 | #define NETDEV_FCOE_WWNN 0 |
1017 | #define NETDEV_FCOE_WWPN 1 | |
1018 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1019 | u64 *wwn, int type); | |
4d288d57 | 1020 | #endif |
3c9c36bc | 1021 | |
c445477d BH |
1022 | #ifdef CONFIG_RFS_ACCEL |
1023 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1024 | const struct sk_buff *skb, | |
1025 | u16 rxq_index, | |
1026 | u32 flow_id); | |
1027 | #endif | |
fbaec0ea JP |
1028 | int (*ndo_add_slave)(struct net_device *dev, |
1029 | struct net_device *slave_dev); | |
1030 | int (*ndo_del_slave)(struct net_device *dev, | |
1031 | struct net_device *slave_dev); | |
c8f44aff MM |
1032 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1033 | netdev_features_t features); | |
5455c699 | 1034 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1035 | netdev_features_t features); |
da6a8fa0 | 1036 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1037 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1038 | |
1039 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1040 | struct nlattr *tb[], |
77162022 | 1041 | struct net_device *dev, |
6b6e2725 | 1042 | const unsigned char *addr, |
77162022 JF |
1043 | u16 flags); |
1044 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1045 | struct nlattr *tb[], |
77162022 | 1046 | struct net_device *dev, |
6b6e2725 | 1047 | const unsigned char *addr); |
77162022 JF |
1048 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1049 | struct netlink_callback *cb, | |
1050 | struct net_device *dev, | |
1051 | int idx); | |
e5a55a89 JF |
1052 | |
1053 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
1054 | struct nlmsghdr *nlh); | |
1055 | int (*ndo_bridge_getlink)(struct sk_buff *skb, | |
1056 | u32 pid, u32 seq, | |
6cbdceeb VY |
1057 | struct net_device *dev, |
1058 | u32 filter_mask); | |
407af329 VY |
1059 | int (*ndo_bridge_dellink)(struct net_device *dev, |
1060 | struct nlmsghdr *nlh); | |
4bf84c35 JP |
1061 | int (*ndo_change_carrier)(struct net_device *dev, |
1062 | bool new_carrier); | |
d314774c SH |
1063 | }; |
1064 | ||
1da177e4 LT |
1065 | /* |
1066 | * The DEVICE structure. | |
1067 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1068 | * data with strictly "high-level" data, and it has to know about | |
1069 | * almost every data structure used in the INET module. | |
1070 | * | |
1071 | * FIXME: cleanup struct net_device such that network protocol info | |
1072 | * moves out. | |
1073 | */ | |
1074 | ||
d94d9fee | 1075 | struct net_device { |
1da177e4 LT |
1076 | |
1077 | /* | |
1078 | * This is the first field of the "visible" part of this structure | |
1079 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
724df615 | 1080 | * of the interface. |
1da177e4 LT |
1081 | */ |
1082 | char name[IFNAMSIZ]; | |
ed77134b | 1083 | |
9136461a | 1084 | /* device name hash chain, please keep it close to name[] */ |
9356b8fc | 1085 | struct hlist_node name_hlist; |
9136461a | 1086 | |
0b815a1a SH |
1087 | /* snmp alias */ |
1088 | char *ifalias; | |
1da177e4 LT |
1089 | |
1090 | /* | |
1091 | * I/O specific fields | |
1092 | * FIXME: Merge these and struct ifmap into one | |
1093 | */ | |
1094 | unsigned long mem_end; /* shared mem end */ | |
1095 | unsigned long mem_start; /* shared mem start */ | |
1096 | unsigned long base_addr; /* device I/O address */ | |
1097 | unsigned int irq; /* device IRQ number */ | |
1098 | ||
1099 | /* | |
1100 | * Some hardware also needs these fields, but they are not | |
1101 | * part of the usual set specified in Space.c. | |
1102 | */ | |
1103 | ||
1da177e4 LT |
1104 | unsigned long state; |
1105 | ||
7562f876 | 1106 | struct list_head dev_list; |
bea3348e | 1107 | struct list_head napi_list; |
44a0873d | 1108 | struct list_head unreg_list; |
4c3d5e7b ED |
1109 | struct list_head upper_dev_list; /* List of upper devices */ |
1110 | ||
1da177e4 | 1111 | |
5455c699 | 1112 | /* currently active device features */ |
c8f44aff | 1113 | netdev_features_t features; |
5455c699 | 1114 | /* user-changeable features */ |
c8f44aff | 1115 | netdev_features_t hw_features; |
5455c699 | 1116 | /* user-requested features */ |
c8f44aff | 1117 | netdev_features_t wanted_features; |
1aac6267 | 1118 | /* mask of features inheritable by VLAN devices */ |
c8f44aff | 1119 | netdev_features_t vlan_features; |
6a674e9c JG |
1120 | /* mask of features inherited by encapsulating devices |
1121 | * This field indicates what encapsulation offloads | |
1122 | * the hardware is capable of doing, and drivers will | |
1123 | * need to set them appropriately. | |
1124 | */ | |
1125 | netdev_features_t hw_enc_features; | |
0d89d203 SH |
1126 | /* mask of fetures inheritable by MPLS */ |
1127 | netdev_features_t mpls_features; | |
04ed3e74 | 1128 | |
1da177e4 LT |
1129 | /* Interface index. Unique device identifier */ |
1130 | int ifindex; | |
1131 | int iflink; | |
1132 | ||
c45d286e | 1133 | struct net_device_stats stats; |
caf586e5 ED |
1134 | atomic_long_t rx_dropped; /* dropped packets by core network |
1135 | * Do not use this in drivers. | |
1136 | */ | |
1da177e4 | 1137 | |
b86e0280 | 1138 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
1139 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1140 | * See <net/iw_handler.h> for details. Jean II */ | |
1141 | const struct iw_handler_def * wireless_handlers; | |
1142 | /* Instance data managed by the core of Wireless Extensions. */ | |
1143 | struct iw_public_data * wireless_data; | |
b86e0280 | 1144 | #endif |
d314774c SH |
1145 | /* Management operations */ |
1146 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 1147 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 1148 | |
3b04ddde SH |
1149 | /* Hardware header description */ |
1150 | const struct header_ops *header_ops; | |
1151 | ||
b00055aa | 1152 | unsigned int flags; /* interface flags (a la BSD) */ |
3bdc0eba BG |
1153 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
1154 | * See if.h for definitions. */ | |
1da177e4 | 1155 | unsigned short gflags; |
1da177e4 LT |
1156 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1157 | ||
b00055aa SR |
1158 | unsigned char operstate; /* RFC2863 operstate */ |
1159 | unsigned char link_mode; /* mapping policy to operstate */ | |
1160 | ||
bdc220da JP |
1161 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1162 | unsigned char dma; /* DMA channel */ | |
1163 | ||
cd7b5396 | 1164 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
1165 | unsigned short type; /* interface hardware type */ |
1166 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 1167 | |
f5184d26 JB |
1168 | /* extra head- and tailroom the hardware may need, but not in all cases |
1169 | * can this be guaranteed, especially tailroom. Some cases also use | |
1170 | * LL_MAX_HEADER instead to allocate the skb. | |
1171 | */ | |
1172 | unsigned short needed_headroom; | |
1173 | unsigned short needed_tailroom; | |
1174 | ||
1da177e4 | 1175 | /* Interface address info. */ |
a6f9a705 | 1176 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
c1f79426 | 1177 | unsigned char addr_assign_type; /* hw address assignment type */ |
1da177e4 | 1178 | unsigned char addr_len; /* hardware address length */ |
596b9b68 | 1179 | unsigned char neigh_priv_len; |
dffebd2c N |
1180 | unsigned short dev_id; /* Used to differentiate devices |
1181 | * that share the same link | |
1182 | * layer address | |
1183 | */ | |
ccffad25 | 1184 | spinlock_t addr_list_lock; |
22bedad3 JP |
1185 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1186 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
4c3d5e7b ED |
1187 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1188 | * hw addresses | |
1189 | */ | |
1190 | #ifdef CONFIG_SYSFS | |
1191 | struct kset *queues_kset; | |
1192 | #endif | |
1193 | ||
2d348d1f | 1194 | bool uc_promisc; |
9d45abe1 WC |
1195 | unsigned int promiscuity; |
1196 | unsigned int allmulti; | |
1da177e4 | 1197 | |
1da177e4 LT |
1198 | |
1199 | /* Protocol specific pointers */ | |
65ac6a5f | 1200 | |
d11ead75 | 1201 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
5b9ea6e0 | 1202 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
65ac6a5f | 1203 | #endif |
34a430d7 | 1204 | #if IS_ENABLED(CONFIG_NET_DSA) |
cf50dcc2 | 1205 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
91da11f8 | 1206 | #endif |
1da177e4 | 1207 | void *atalk_ptr; /* AppleTalk link */ |
95ae6b22 | 1208 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
fc766e4c | 1209 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
198caeca | 1210 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1da177e4 | 1211 | void *ax25_ptr; /* AX.25 specific data */ |
704232c2 JB |
1212 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1213 | assign before registering */ | |
1da177e4 | 1214 | |
9356b8fc | 1215 | /* |
cd13539b | 1216 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1217 | */ |
4dc89133 ED |
1218 | unsigned long last_rx; /* Time of last Rx |
1219 | * This should not be set in | |
1220 | * drivers, unless really needed, | |
1221 | * because network stack (bonding) | |
1222 | * use it if/when necessary, to | |
1223 | * avoid dirtying this cache line. | |
1224 | */ | |
1225 | ||
9356b8fc | 1226 | /* Interface address info used in eth_type_trans() */ |
f001fde5 JP |
1227 | unsigned char *dev_addr; /* hw address, (before bcast |
1228 | because most packets are | |
1229 | unicast) */ | |
1230 | ||
0a9627f2 | 1231 | |
ccf5ff69 | 1232 | #ifdef CONFIG_RPS |
0a9627f2 TH |
1233 | struct netdev_rx_queue *_rx; |
1234 | ||
62fe0b40 | 1235 | /* Number of RX queues allocated at register_netdev() time */ |
0a9627f2 | 1236 | unsigned int num_rx_queues; |
62fe0b40 BH |
1237 | |
1238 | /* Number of RX queues currently active in device */ | |
1239 | unsigned int real_num_rx_queues; | |
c445477d | 1240 | |
df334545 | 1241 | #endif |
0a9627f2 | 1242 | |
61391cde | 1243 | rx_handler_func_t __rcu *rx_handler; |
1244 | void __rcu *rx_handler_data; | |
e8a0464c | 1245 | |
24824a09 | 1246 | struct netdev_queue __rcu *ingress_queue; |
4c3d5e7b ED |
1247 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
1248 | ||
cd13539b ED |
1249 | |
1250 | /* | |
1251 | * Cache lines mostly used on transmit path | |
1252 | */ | |
e8a0464c | 1253 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
fd2ea0a7 DM |
1254 | |
1255 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 1256 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
1257 | |
1258 | /* Number of TX queues currently active in device */ | |
1259 | unsigned int real_num_tx_queues; | |
1260 | ||
af356afa PM |
1261 | /* root qdisc from userspace point of view */ |
1262 | struct Qdisc *qdisc; | |
1263 | ||
1da177e4 | 1264 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 1265 | spinlock_t tx_global_lock; |
cd13539b | 1266 | |
bf264145 | 1267 | #ifdef CONFIG_XPS |
a4177869 | 1268 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1269 | #endif |
4c3d5e7b ED |
1270 | #ifdef CONFIG_RFS_ACCEL |
1271 | /* CPU reverse-mapping for RX completion interrupts, indexed | |
1272 | * by RX queue number. Assigned by driver. This must only be | |
1273 | * set if the ndo_rx_flow_steer operation is defined. */ | |
1274 | struct cpu_rmap *rx_cpu_rmap; | |
1275 | #endif | |
1d24eb48 | 1276 | |
9356b8fc | 1277 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1278 | |
1279 | /* | |
1280 | * trans_start here is expensive for high speed devices on SMP, | |
1281 | * please use netdev_queue->trans_start instead. | |
1282 | */ | |
9356b8fc ED |
1283 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1284 | ||
1285 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1286 | struct timer_list watchdog_timer; | |
1287 | ||
1da177e4 | 1288 | /* Number of references to this device */ |
29b4433d | 1289 | int __percpu *pcpu_refcnt; |
9356b8fc | 1290 | |
1da177e4 LT |
1291 | /* delayed register/unregister */ |
1292 | struct list_head todo_list; | |
1da177e4 LT |
1293 | /* device index hash chain */ |
1294 | struct hlist_node index_hlist; | |
1295 | ||
e014debe | 1296 | struct list_head link_watch_list; |
572a103d | 1297 | |
1da177e4 LT |
1298 | /* register/unregister state machine */ |
1299 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1300 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1301 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1302 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1303 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1304 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1305 | } reg_state:8; |
1306 | ||
1307 | bool dismantle; /* device is going do be freed */ | |
a2835763 PM |
1308 | |
1309 | enum { | |
1310 | RTNL_LINK_INITIALIZED, | |
1311 | RTNL_LINK_INITIALIZING, | |
1312 | } rtnl_link_state:16; | |
1da177e4 | 1313 | |
d314774c SH |
1314 | /* Called from unregister, can be used to call free_netdev */ |
1315 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1316 | |
1da177e4 | 1317 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1318 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1319 | #endif |
eae792b7 | 1320 | |
c346dca1 | 1321 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1322 | /* Network namespace this network device is inside */ |
1323 | struct net *nd_net; | |
c346dca1 | 1324 | #endif |
4a1c5371 | 1325 | |
4951704b | 1326 | /* mid-layer private */ |
a7855c78 ED |
1327 | union { |
1328 | void *ml_priv; | |
1329 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ | |
290b895e | 1330 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
6d81f41c | 1331 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
2681128f | 1332 | struct pcpu_vstats __percpu *vstats; /* veth stats */ |
a7855c78 | 1333 | }; |
eca9ebac | 1334 | /* GARP */ |
3cc77ec7 | 1335 | struct garp_port __rcu *garp_port; |
febf018d DW |
1336 | /* MRP */ |
1337 | struct mrp_port __rcu *mrp_port; | |
1da177e4 | 1338 | |
1da177e4 | 1339 | /* class/net/name entry */ |
43cb76d9 | 1340 | struct device dev; |
0c509a6c EB |
1341 | /* space for optional device, statistics, and wireless sysfs groups */ |
1342 | const struct attribute_group *sysfs_groups[4]; | |
38f7b870 PM |
1343 | |
1344 | /* rtnetlink link ops */ | |
1345 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1346 | |
82cc1a7a PWJ |
1347 | /* for setting kernel sock attribute on TCP connection setup */ |
1348 | #define GSO_MAX_SIZE 65536 | |
1349 | unsigned int gso_max_size; | |
30b678d8 BH |
1350 | #define GSO_MAX_SEGS 65535 |
1351 | u16 gso_max_segs; | |
d314774c | 1352 | |
7a6b6f51 | 1353 | #ifdef CONFIG_DCB |
2f90b865 | 1354 | /* Data Center Bridging netlink ops */ |
32953543 | 1355 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1356 | #endif |
4f57c087 JF |
1357 | u8 num_tc; |
1358 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1359 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1360 | |
d11ead75 | 1361 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 YZ |
1362 | /* max exchange id for FCoE LRO by ddp */ |
1363 | unsigned int fcoe_ddp_xid; | |
5bc1421e NH |
1364 | #endif |
1365 | #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) | |
1366 | struct netprio_map __rcu *priomap; | |
4d288d57 | 1367 | #endif |
c1f19b51 RC |
1368 | /* phy device may attach itself for hardware timestamping */ |
1369 | struct phy_device *phydev; | |
cbda10fa | 1370 | |
23d3b8bf ED |
1371 | struct lock_class_key *qdisc_tx_busylock; |
1372 | ||
cbda10fa VD |
1373 | /* group the device belongs to */ |
1374 | int group; | |
9136461a ED |
1375 | |
1376 | struct pm_qos_request pm_qos_req; | |
1da177e4 | 1377 | }; |
43cb76d9 | 1378 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1379 | |
1380 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1381 | |
4f57c087 JF |
1382 | static inline |
1383 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1384 | { | |
1385 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1386 | } | |
1387 | ||
1388 | static inline | |
1389 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1390 | { | |
1391 | if (tc >= dev->num_tc) | |
1392 | return -EINVAL; | |
1393 | ||
1394 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | static inline | |
1399 | void netdev_reset_tc(struct net_device *dev) | |
1400 | { | |
1401 | dev->num_tc = 0; | |
1402 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1403 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1404 | } | |
1405 | ||
1406 | static inline | |
1407 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1408 | { | |
1409 | if (tc >= dev->num_tc) | |
1410 | return -EINVAL; | |
1411 | ||
1412 | dev->tc_to_txq[tc].count = count; | |
1413 | dev->tc_to_txq[tc].offset = offset; | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | static inline | |
1418 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1419 | { | |
1420 | if (num_tc > TC_MAX_QUEUE) | |
1421 | return -EINVAL; | |
1422 | ||
1423 | dev->num_tc = num_tc; | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static inline | |
1428 | int netdev_get_num_tc(struct net_device *dev) | |
1429 | { | |
1430 | return dev->num_tc; | |
1431 | } | |
1432 | ||
e8a0464c DM |
1433 | static inline |
1434 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1435 | unsigned int index) | |
1436 | { | |
1437 | return &dev->_tx[index]; | |
1438 | } | |
1439 | ||
1440 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1441 | void (*f)(struct net_device *, | |
1442 | struct netdev_queue *, | |
1443 | void *), | |
1444 | void *arg) | |
1445 | { | |
1446 | unsigned int i; | |
1447 | ||
1448 | for (i = 0; i < dev->num_tx_queues; i++) | |
1449 | f(dev, &dev->_tx[i], arg); | |
1450 | } | |
1451 | ||
8c4c49df AW |
1452 | extern struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
1453 | struct sk_buff *skb); | |
416186fb | 1454 | extern u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); |
8c4c49df | 1455 | |
c346dca1 YH |
1456 | /* |
1457 | * Net namespace inlines | |
1458 | */ | |
1459 | static inline | |
1460 | struct net *dev_net(const struct net_device *dev) | |
1461 | { | |
c2d9ba9b | 1462 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1463 | } |
1464 | ||
1465 | static inline | |
f5aa23fd | 1466 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1467 | { |
1468 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1469 | release_net(dev->nd_net); |
1470 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1471 | #endif |
1472 | } | |
1473 | ||
cf85d08f LB |
1474 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1475 | { | |
1476 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1477 | if (dev->dsa_ptr != NULL) | |
1478 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1479 | #endif | |
1480 | ||
1481 | return 0; | |
1482 | } | |
1483 | ||
396138f0 LB |
1484 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1485 | { | |
1486 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1487 | if (dev->dsa_ptr != NULL) | |
1488 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1489 | #endif | |
1490 | ||
1491 | return 0; | |
1492 | } | |
1493 | ||
bea3348e SH |
1494 | /** |
1495 | * netdev_priv - access network device private data | |
1496 | * @dev: network device | |
1497 | * | |
1498 | * Get network device private data | |
1499 | */ | |
6472ce60 | 1500 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1501 | { |
1ce8e7b5 | 1502 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1503 | } |
1504 | ||
1da177e4 LT |
1505 | /* Set the sysfs physical device reference for the network logical device |
1506 | * if set prior to registration will cause a symlink during initialization. | |
1507 | */ | |
43cb76d9 | 1508 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1509 | |
384912ed MH |
1510 | /* Set the sysfs device type for the network logical device to allow |
1511 | * fin grained indentification of different network device types. For | |
1512 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1513 | */ | |
1514 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1515 | ||
82dc3c63 ED |
1516 | /* Default NAPI poll() weight |
1517 | * Device drivers are strongly advised to not use bigger value | |
1518 | */ | |
1519 | #define NAPI_POLL_WEIGHT 64 | |
1520 | ||
3b582cc1 SH |
1521 | /** |
1522 | * netif_napi_add - initialize a napi context | |
1523 | * @dev: network device | |
1524 | * @napi: napi context | |
1525 | * @poll: polling function | |
1526 | * @weight: default weight | |
1527 | * | |
1528 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1529 | * *any* of the other napi related functions. | |
1530 | */ | |
d565b0a1 HX |
1531 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1532 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1533 | |
d8156534 AD |
1534 | /** |
1535 | * netif_napi_del - remove a napi context | |
1536 | * @napi: napi context | |
1537 | * | |
1538 | * netif_napi_del() removes a napi context from the network device napi list | |
1539 | */ | |
d565b0a1 HX |
1540 | void netif_napi_del(struct napi_struct *napi); |
1541 | ||
1542 | struct napi_gro_cb { | |
78a478d0 HX |
1543 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1544 | void *frag0; | |
1545 | ||
7489594c HX |
1546 | /* Length of frag0. */ |
1547 | unsigned int frag0_len; | |
1548 | ||
86911732 HX |
1549 | /* This indicates where we are processing relative to skb->data. */ |
1550 | int data_offset; | |
1551 | ||
d565b0a1 HX |
1552 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
1553 | int flush; | |
1554 | ||
1555 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
1556 | u16 count; |
1557 | ||
1558 | /* This is non-zero if the packet may be of the same flow. */ | |
1559 | u8 same_flow; | |
5d38a079 HX |
1560 | |
1561 | /* Free the skb? */ | |
2e71a6f8 | 1562 | u8 free; |
d7e8883c ED |
1563 | #define NAPI_GRO_FREE 1 |
1564 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2e71a6f8 ED |
1565 | |
1566 | /* jiffies when first packet was created/queued */ | |
1567 | unsigned long age; | |
86347245 ED |
1568 | |
1569 | /* Used in ipv6_gro_receive() */ | |
1570 | int proto; | |
c3c7c254 ED |
1571 | |
1572 | /* used in skb_gro_receive() slow path */ | |
1573 | struct sk_buff *last; | |
d565b0a1 HX |
1574 | }; |
1575 | ||
1576 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1577 | |
1da177e4 | 1578 | struct packet_type { |
f2ccd8fa DM |
1579 | __be16 type; /* This is really htons(ether_type). */ |
1580 | struct net_device *dev; /* NULL is wildcarded here */ | |
1581 | int (*func) (struct sk_buff *, | |
1582 | struct net_device *, | |
1583 | struct packet_type *, | |
1584 | struct net_device *); | |
c0de08d0 EL |
1585 | bool (*id_match)(struct packet_type *ptype, |
1586 | struct sock *sk); | |
1da177e4 LT |
1587 | void *af_packet_priv; |
1588 | struct list_head list; | |
1589 | }; | |
1590 | ||
f191a1d1 | 1591 | struct offload_callbacks { |
576a30eb | 1592 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1593 | netdev_features_t features); |
a430a43d | 1594 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1595 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1596 | struct sk_buff *skb); | |
1597 | int (*gro_complete)(struct sk_buff *skb); | |
f191a1d1 VY |
1598 | }; |
1599 | ||
1600 | struct packet_offload { | |
1601 | __be16 type; /* This is really htons(ether_type). */ | |
1602 | struct offload_callbacks callbacks; | |
1603 | struct list_head list; | |
1da177e4 LT |
1604 | }; |
1605 | ||
1da177e4 LT |
1606 | #include <linux/notifier.h> |
1607 | ||
dcfe1421 AW |
1608 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1609 | * notification exclusion list in rtnetlink_event() when adding new | |
1610 | * types. | |
1611 | */ | |
1612 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
1613 | #define NETDEV_DOWN 0x0002 | |
1614 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
1615 | detected a hardware crash and restarted | |
1616 | - we can use this eg to kick tcp sessions | |
1617 | once done */ | |
1618 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
1619 | #define NETDEV_REGISTER 0x0005 | |
1620 | #define NETDEV_UNREGISTER 0x0006 | |
1621 | #define NETDEV_CHANGEMTU 0x0007 | |
1622 | #define NETDEV_CHANGEADDR 0x0008 | |
1623 | #define NETDEV_GOING_DOWN 0x0009 | |
1624 | #define NETDEV_CHANGENAME 0x000A | |
1625 | #define NETDEV_FEAT_CHANGE 0x000B | |
1626 | #define NETDEV_BONDING_FAILOVER 0x000C | |
1627 | #define NETDEV_PRE_UP 0x000D | |
1628 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
1629 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
1630 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 1631 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
1632 | #define NETDEV_RELEASE 0x0012 |
1633 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
1634 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 1635 | #define NETDEV_CHANGEUPPER 0x0015 |
dcfe1421 AW |
1636 | |
1637 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1638 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
1639 | |
1640 | struct netdev_notifier_info { | |
1641 | struct net_device *dev; | |
1642 | }; | |
1643 | ||
be9efd36 JP |
1644 | struct netdev_notifier_change_info { |
1645 | struct netdev_notifier_info info; /* must be first */ | |
1646 | unsigned int flags_changed; | |
1647 | }; | |
1648 | ||
75538c2b CW |
1649 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
1650 | struct net_device *dev) | |
1651 | { | |
1652 | info->dev = dev; | |
1653 | } | |
1654 | ||
351638e7 JP |
1655 | static inline struct net_device * |
1656 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
1657 | { | |
1658 | return info->dev; | |
1659 | } | |
1660 | ||
1661 | extern int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev, | |
1662 | struct netdev_notifier_info *info); | |
dcfe1421 AW |
1663 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
1664 | ||
1665 | ||
1da177e4 LT |
1666 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1667 | ||
30e6c9fa | 1668 | extern seqcount_t devnet_rename_seq; /* Device rename seq */ |
c91f6df2 | 1669 | |
7562f876 | 1670 | |
881d966b EB |
1671 | #define for_each_netdev(net, d) \ |
1672 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1673 | #define for_each_netdev_reverse(net, d) \ |
1674 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1675 | #define for_each_netdev_rcu(net, d) \ |
1676 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1677 | #define for_each_netdev_safe(net, d, n) \ |
1678 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1679 | #define for_each_netdev_continue(net, d) \ | |
1680 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1681 | #define for_each_netdev_continue_rcu(net, d) \ |
1682 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 1683 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
1684 | for_each_netdev_rcu(&init_net, slave) \ | |
1685 | if (netdev_master_upper_dev_get_rcu(slave) == bond) | |
881d966b | 1686 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1687 | |
a050c33f DL |
1688 | static inline struct net_device *next_net_device(struct net_device *dev) |
1689 | { | |
1690 | struct list_head *lh; | |
1691 | struct net *net; | |
1692 | ||
c346dca1 | 1693 | net = dev_net(dev); |
a050c33f DL |
1694 | lh = dev->dev_list.next; |
1695 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1696 | } | |
1697 | ||
ce81b76a ED |
1698 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1699 | { | |
1700 | struct list_head *lh; | |
1701 | struct net *net; | |
1702 | ||
1703 | net = dev_net(dev); | |
ccf43438 | 1704 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
1705 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1706 | } | |
1707 | ||
a050c33f DL |
1708 | static inline struct net_device *first_net_device(struct net *net) |
1709 | { | |
1710 | return list_empty(&net->dev_base_head) ? NULL : | |
1711 | net_device_entry(net->dev_base_head.next); | |
1712 | } | |
7562f876 | 1713 | |
ccf43438 ED |
1714 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1715 | { | |
1716 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
1717 | ||
1718 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1719 | } | |
1720 | ||
1da177e4 LT |
1721 | extern int netdev_boot_setup_check(struct net_device *dev); |
1722 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
941666c2 ED |
1723 | extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
1724 | const char *hwaddr); | |
881d966b EB |
1725 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
1726 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
1727 | extern void dev_add_pack(struct packet_type *pt); |
1728 | extern void dev_remove_pack(struct packet_type *pt); | |
1729 | extern void __dev_remove_pack(struct packet_type *pt); | |
62532da9 VY |
1730 | extern void dev_add_offload(struct packet_offload *po); |
1731 | extern void dev_remove_offload(struct packet_offload *po); | |
1732 | extern void __dev_remove_offload(struct packet_offload *po); | |
1da177e4 | 1733 | |
bb69ae04 ED |
1734 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
1735 | unsigned short mask); | |
881d966b | 1736 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
72c9528b | 1737 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
881d966b | 1738 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1da177e4 LT |
1739 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
1740 | extern int dev_open(struct net_device *dev); | |
1741 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 1742 | extern void dev_disable_lro(struct net_device *dev); |
95603e22 | 1743 | extern int dev_loopback_xmit(struct sk_buff *newskb); |
1da177e4 LT |
1744 | extern int dev_queue_xmit(struct sk_buff *skb); |
1745 | extern int register_netdevice(struct net_device *dev); | |
44a0873d ED |
1746 | extern void unregister_netdevice_queue(struct net_device *dev, |
1747 | struct list_head *head); | |
9b5e383c | 1748 | extern void unregister_netdevice_many(struct list_head *head); |
44a0873d ED |
1749 | static inline void unregister_netdevice(struct net_device *dev) |
1750 | { | |
1751 | unregister_netdevice_queue(dev, NULL); | |
1752 | } | |
1753 | ||
29b4433d | 1754 | extern int netdev_refcnt_read(const struct net_device *dev); |
1da177e4 LT |
1755 | extern void free_netdev(struct net_device *dev); |
1756 | extern void synchronize_net(void); | |
937f1ba5 BH |
1757 | extern int init_dummy_netdev(struct net_device *dev); |
1758 | ||
881d966b EB |
1759 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1760 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
fb699dfd | 1761 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
5dbe7c17 | 1762 | extern int netdev_get_name(struct net *net, char *name, int ifindex); |
1da177e4 LT |
1763 | extern int dev_restart(struct net_device *dev); |
1764 | #ifdef CONFIG_NETPOLL_TRAP | |
1765 | extern int netpoll_trap(void); | |
1766 | #endif | |
86911732 HX |
1767 | extern int skb_gro_receive(struct sk_buff **head, |
1768 | struct sk_buff *skb); | |
1769 | ||
1770 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1771 | { | |
1772 | return NAPI_GRO_CB(skb)->data_offset; | |
1773 | } | |
1774 | ||
1775 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1776 | { | |
1777 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1778 | } | |
1779 | ||
1780 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1781 | { | |
1782 | NAPI_GRO_CB(skb)->data_offset += len; | |
1783 | } | |
1784 | ||
a5b1cf28 HX |
1785 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1786 | unsigned int offset) | |
86911732 | 1787 | { |
a5b1cf28 HX |
1788 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1789 | } | |
78a478d0 | 1790 | |
a5b1cf28 HX |
1791 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1792 | { | |
1793 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1794 | } | |
78a478d0 | 1795 | |
a5b1cf28 HX |
1796 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1797 | unsigned int offset) | |
1798 | { | |
17dd759c HX |
1799 | if (!pskb_may_pull(skb, hlen)) |
1800 | return NULL; | |
1801 | ||
a5b1cf28 HX |
1802 | NAPI_GRO_CB(skb)->frag0 = NULL; |
1803 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 1804 | return skb->data + offset; |
86911732 | 1805 | } |
1da177e4 | 1806 | |
aa4b9f53 HX |
1807 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1808 | { | |
78d3fd0b | 1809 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
1810 | } |
1811 | ||
36e7b1b8 HX |
1812 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1813 | { | |
78d3fd0b HX |
1814 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1815 | skb_network_offset(skb); | |
36e7b1b8 HX |
1816 | } |
1817 | ||
0c4e8581 SH |
1818 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1819 | unsigned short type, | |
3b04ddde | 1820 | const void *daddr, const void *saddr, |
95c96174 | 1821 | unsigned int len) |
0c4e8581 | 1822 | { |
f1ecfd5d | 1823 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 1824 | return 0; |
3b04ddde SH |
1825 | |
1826 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
1827 | } |
1828 | ||
b95cce35 SH |
1829 | static inline int dev_parse_header(const struct sk_buff *skb, |
1830 | unsigned char *haddr) | |
1831 | { | |
1832 | const struct net_device *dev = skb->dev; | |
1833 | ||
1b83336b | 1834 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 1835 | return 0; |
3b04ddde | 1836 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
1837 | } |
1838 | ||
1da177e4 LT |
1839 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1840 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1841 | static inline int unregister_gifconf(unsigned int family) | |
1842 | { | |
1843 | return register_gifconf(family, NULL); | |
1844 | } | |
1845 | ||
99bbc707 | 1846 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 1847 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
1848 | struct sd_flow_limit { |
1849 | u64 count; | |
1850 | unsigned int num_buckets; | |
1851 | unsigned int history_head; | |
1852 | u16 history[FLOW_LIMIT_HISTORY]; | |
1853 | u8 buckets[]; | |
1854 | }; | |
1855 | ||
1856 | extern int netdev_flow_limit_table_len; | |
1857 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
1858 | ||
1da177e4 | 1859 | /* |
88751275 | 1860 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 1861 | */ |
d94d9fee | 1862 | struct softnet_data { |
37437bb2 | 1863 | struct Qdisc *output_queue; |
a9cbd588 | 1864 | struct Qdisc **output_queue_tailp; |
1da177e4 | 1865 | struct list_head poll_list; |
1da177e4 | 1866 | struct sk_buff *completion_queue; |
6e7676c1 | 1867 | struct sk_buff_head process_queue; |
1da177e4 | 1868 | |
dee42870 | 1869 | /* stats */ |
cd7b5396 DM |
1870 | unsigned int processed; |
1871 | unsigned int time_squeeze; | |
1872 | unsigned int cpu_collision; | |
1873 | unsigned int received_rps; | |
dee42870 | 1874 | |
fd793d89 | 1875 | #ifdef CONFIG_RPS |
88751275 ED |
1876 | struct softnet_data *rps_ipi_list; |
1877 | ||
1878 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 1879 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
1880 | struct softnet_data *rps_ipi_next; |
1881 | unsigned int cpu; | |
fec5e652 | 1882 | unsigned int input_queue_head; |
76cc8b13 | 1883 | unsigned int input_queue_tail; |
1e94d72f | 1884 | #endif |
95c96174 | 1885 | unsigned int dropped; |
0a9627f2 | 1886 | struct sk_buff_head input_pkt_queue; |
bea3348e | 1887 | struct napi_struct backlog; |
99bbc707 WB |
1888 | |
1889 | #ifdef CONFIG_NET_FLOW_LIMIT | |
5f121b9a | 1890 | struct sd_flow_limit __rcu *flow_limit; |
99bbc707 | 1891 | #endif |
1da177e4 LT |
1892 | }; |
1893 | ||
76cc8b13 | 1894 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
1895 | { |
1896 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
1897 | sd->input_queue_head++; |
1898 | #endif | |
1899 | } | |
1900 | ||
1901 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
1902 | unsigned int *qtail) | |
1903 | { | |
1904 | #ifdef CONFIG_RPS | |
1905 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
1906 | #endif |
1907 | } | |
1908 | ||
0a9627f2 | 1909 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 1910 | |
37437bb2 | 1911 | extern void __netif_schedule(struct Qdisc *q); |
1da177e4 | 1912 | |
86d804e1 | 1913 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 1914 | { |
73466498 | 1915 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
37437bb2 | 1916 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
1917 | } |
1918 | ||
fd2ea0a7 DM |
1919 | static inline void netif_tx_schedule_all(struct net_device *dev) |
1920 | { | |
1921 | unsigned int i; | |
1922 | ||
1923 | for (i = 0; i < dev->num_tx_queues; i++) | |
1924 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1925 | } | |
1926 | ||
d29f749e DJ |
1927 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
1928 | { | |
73466498 | 1929 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
1930 | } |
1931 | ||
bea3348e SH |
1932 | /** |
1933 | * netif_start_queue - allow transmit | |
1934 | * @dev: network device | |
1935 | * | |
1936 | * Allow upper layers to call the device hard_start_xmit routine. | |
1937 | */ | |
1da177e4 LT |
1938 | static inline void netif_start_queue(struct net_device *dev) |
1939 | { | |
e8a0464c | 1940 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1941 | } |
1942 | ||
fd2ea0a7 DM |
1943 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
1944 | { | |
1945 | unsigned int i; | |
1946 | ||
1947 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1948 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1949 | netif_tx_start_queue(txq); | |
1950 | } | |
1951 | } | |
1952 | ||
79d16385 | 1953 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1954 | { |
1955 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1956 | if (netpoll_trap()) { |
7b3d3e4f | 1957 | netif_tx_start_queue(dev_queue); |
1da177e4 | 1958 | return; |
5f286e11 | 1959 | } |
1da177e4 | 1960 | #endif |
73466498 | 1961 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
37437bb2 | 1962 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
1963 | } |
1964 | ||
d29f749e DJ |
1965 | /** |
1966 | * netif_wake_queue - restart transmit | |
1967 | * @dev: network device | |
1968 | * | |
1969 | * Allow upper layers to call the device hard_start_xmit routine. | |
1970 | * Used for flow control when transmit resources are available. | |
1971 | */ | |
79d16385 DM |
1972 | static inline void netif_wake_queue(struct net_device *dev) |
1973 | { | |
e8a0464c | 1974 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1975 | } |
1976 | ||
fd2ea0a7 DM |
1977 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
1978 | { | |
1979 | unsigned int i; | |
1980 | ||
1981 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1982 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1983 | netif_tx_wake_queue(txq); | |
1984 | } | |
1985 | } | |
1986 | ||
d29f749e DJ |
1987 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1988 | { | |
18543a64 | 1989 | if (WARN_ON(!dev_queue)) { |
256ee435 | 1990 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
1991 | return; |
1992 | } | |
73466498 | 1993 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
1994 | } |
1995 | ||
bea3348e SH |
1996 | /** |
1997 | * netif_stop_queue - stop transmitted packets | |
1998 | * @dev: network device | |
1999 | * | |
2000 | * Stop upper layers calling the device hard_start_xmit routine. | |
2001 | * Used for flow control when transmit resources are unavailable. | |
2002 | */ | |
1da177e4 LT |
2003 | static inline void netif_stop_queue(struct net_device *dev) |
2004 | { | |
e8a0464c | 2005 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2006 | } |
2007 | ||
fd2ea0a7 DM |
2008 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
2009 | { | |
2010 | unsigned int i; | |
2011 | ||
2012 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2013 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2014 | netif_tx_stop_queue(txq); | |
2015 | } | |
2016 | } | |
2017 | ||
4d29515f | 2018 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2019 | { |
73466498 | 2020 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2021 | } |
2022 | ||
bea3348e SH |
2023 | /** |
2024 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2025 | * @dev: network device | |
2026 | * | |
2027 | * Test if transmit queue on device is currently unable to send. | |
2028 | */ | |
4d29515f | 2029 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2030 | { |
e8a0464c | 2031 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2032 | } |
2033 | ||
4d29515f | 2034 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2035 | { |
73466498 TH |
2036 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2037 | } | |
2038 | ||
4d29515f | 2039 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
73466498 TH |
2040 | { |
2041 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2042 | } | |
2043 | ||
c5d67bd7 TH |
2044 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2045 | unsigned int bytes) | |
2046 | { | |
114cf580 TH |
2047 | #ifdef CONFIG_BQL |
2048 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2049 | |
2050 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2051 | return; | |
2052 | ||
2053 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2054 | ||
2055 | /* | |
2056 | * The XOFF flag must be set before checking the dql_avail below, | |
2057 | * because in netdev_tx_completed_queue we update the dql_completed | |
2058 | * before checking the XOFF flag. | |
2059 | */ | |
2060 | smp_mb(); | |
2061 | ||
2062 | /* check again in case another CPU has just made room avail */ | |
2063 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2064 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2065 | #endif |
c5d67bd7 TH |
2066 | } |
2067 | ||
2068 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) | |
2069 | { | |
2070 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2071 | } | |
2072 | ||
2073 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2074 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2075 | { |
114cf580 | 2076 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2077 | if (unlikely(!bytes)) |
2078 | return; | |
2079 | ||
2080 | dql_completed(&dev_queue->dql, bytes); | |
2081 | ||
2082 | /* | |
2083 | * Without the memory barrier there is a small possiblity that | |
2084 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2085 | * be stopped forever | |
2086 | */ | |
2087 | smp_mb(); | |
2088 | ||
2089 | if (dql_avail(&dev_queue->dql) < 0) | |
2090 | return; | |
2091 | ||
2092 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2093 | netif_schedule_queue(dev_queue); | |
114cf580 | 2094 | #endif |
c5d67bd7 TH |
2095 | } |
2096 | ||
2097 | static inline void netdev_completed_queue(struct net_device *dev, | |
95c96174 | 2098 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2099 | { |
2100 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2101 | } | |
2102 | ||
2103 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
2104 | { | |
114cf580 | 2105 | #ifdef CONFIG_BQL |
5c490354 | 2106 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
2107 | dql_reset(&q->dql); |
2108 | #endif | |
c5d67bd7 TH |
2109 | } |
2110 | ||
2111 | static inline void netdev_reset_queue(struct net_device *dev_queue) | |
2112 | { | |
2113 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
2114 | } |
2115 | ||
bea3348e SH |
2116 | /** |
2117 | * netif_running - test if up | |
2118 | * @dev: network device | |
2119 | * | |
2120 | * Test if the device has been brought up. | |
2121 | */ | |
4d29515f | 2122 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
2123 | { |
2124 | return test_bit(__LINK_STATE_START, &dev->state); | |
2125 | } | |
2126 | ||
f25f4e44 PWJ |
2127 | /* |
2128 | * Routines to manage the subqueues on a device. We only need start | |
2129 | * stop, and a check if it's stopped. All other device management is | |
2130 | * done at the overall netdevice level. | |
2131 | * Also test the device if we're multiqueue. | |
2132 | */ | |
bea3348e SH |
2133 | |
2134 | /** | |
2135 | * netif_start_subqueue - allow sending packets on subqueue | |
2136 | * @dev: network device | |
2137 | * @queue_index: sub queue index | |
2138 | * | |
2139 | * Start individual transmit queue of a device with multiple transmit queues. | |
2140 | */ | |
f25f4e44 PWJ |
2141 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2142 | { | |
fd2ea0a7 | 2143 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2144 | |
2145 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
2146 | } |
2147 | ||
bea3348e SH |
2148 | /** |
2149 | * netif_stop_subqueue - stop sending packets on subqueue | |
2150 | * @dev: network device | |
2151 | * @queue_index: sub queue index | |
2152 | * | |
2153 | * Stop individual transmit queue of a device with multiple transmit queues. | |
2154 | */ | |
f25f4e44 PWJ |
2155 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2156 | { | |
fd2ea0a7 | 2157 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
2158 | #ifdef CONFIG_NETPOLL_TRAP |
2159 | if (netpoll_trap()) | |
2160 | return; | |
2161 | #endif | |
7b3d3e4f | 2162 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
2163 | } |
2164 | ||
bea3348e SH |
2165 | /** |
2166 | * netif_subqueue_stopped - test status of subqueue | |
2167 | * @dev: network device | |
2168 | * @queue_index: sub queue index | |
2169 | * | |
2170 | * Check individual transmit queue of a device with multiple transmit queues. | |
2171 | */ | |
4d29515f DM |
2172 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2173 | u16 queue_index) | |
f25f4e44 | 2174 | { |
fd2ea0a7 | 2175 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2176 | |
2177 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
2178 | } |
2179 | ||
4d29515f DM |
2180 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2181 | struct sk_buff *skb) | |
668f895a PE |
2182 | { |
2183 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
2184 | } | |
bea3348e SH |
2185 | |
2186 | /** | |
2187 | * netif_wake_subqueue - allow sending packets on subqueue | |
2188 | * @dev: network device | |
2189 | * @queue_index: sub queue index | |
2190 | * | |
2191 | * Resume individual transmit queue of a device with multiple transmit queues. | |
2192 | */ | |
f25f4e44 PWJ |
2193 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
2194 | { | |
fd2ea0a7 | 2195 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
2196 | #ifdef CONFIG_NETPOLL_TRAP |
2197 | if (netpoll_trap()) | |
2198 | return; | |
2199 | #endif | |
73466498 | 2200 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
37437bb2 | 2201 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
2202 | } |
2203 | ||
537c00de | 2204 | #ifdef CONFIG_XPS |
537c00de AD |
2205 | extern int netif_set_xps_queue(struct net_device *dev, struct cpumask *mask, |
2206 | u16 index); | |
2207 | #else | |
2208 | static inline int netif_set_xps_queue(struct net_device *dev, | |
2209 | struct cpumask *mask, | |
2210 | u16 index) | |
2211 | { | |
2212 | return 0; | |
2213 | } | |
2214 | #endif | |
2215 | ||
a3d22a68 VZ |
2216 | /* |
2217 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
2218 | * as a distribution range limit for the returned value. | |
2219 | */ | |
2220 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
2221 | const struct sk_buff *skb) | |
2222 | { | |
2223 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
2224 | } | |
2225 | ||
bea3348e SH |
2226 | /** |
2227 | * netif_is_multiqueue - test if device has multiple transmit queues | |
2228 | * @dev: network device | |
2229 | * | |
2230 | * Check if device has multiple transmit queues | |
bea3348e | 2231 | */ |
4d29515f | 2232 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 2233 | { |
a02cec21 | 2234 | return dev->num_tx_queues > 1; |
f25f4e44 | 2235 | } |
1da177e4 | 2236 | |
e6484930 TH |
2237 | extern int netif_set_real_num_tx_queues(struct net_device *dev, |
2238 | unsigned int txq); | |
f0796d5c | 2239 | |
62fe0b40 BH |
2240 | #ifdef CONFIG_RPS |
2241 | extern int netif_set_real_num_rx_queues(struct net_device *dev, | |
2242 | unsigned int rxq); | |
2243 | #else | |
2244 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
2245 | unsigned int rxq) | |
2246 | { | |
2247 | return 0; | |
2248 | } | |
2249 | #endif | |
2250 | ||
3171d026 BH |
2251 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
2252 | const struct net_device *from_dev) | |
2253 | { | |
ee6ae1a1 JP |
2254 | int err; |
2255 | ||
2256 | err = netif_set_real_num_tx_queues(to_dev, | |
2257 | from_dev->real_num_tx_queues); | |
2258 | if (err) | |
2259 | return err; | |
3171d026 BH |
2260 | #ifdef CONFIG_RPS |
2261 | return netif_set_real_num_rx_queues(to_dev, | |
2262 | from_dev->real_num_rx_queues); | |
2263 | #else | |
2264 | return 0; | |
2265 | #endif | |
2266 | } | |
2267 | ||
16917b87 YM |
2268 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
2269 | extern int netif_get_num_default_rss_queues(void); | |
2270 | ||
1da177e4 | 2271 | /* Use this variant when it is known for sure that it |
0ef47309 ML |
2272 | * is executing from hardware interrupt context or with hardware interrupts |
2273 | * disabled. | |
1da177e4 | 2274 | */ |
bea3348e | 2275 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
2276 | |
2277 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
2278 | * from either hardware interrupt or other context, with hardware interrupts |
2279 | * either disabled or enabled. | |
1da177e4 | 2280 | */ |
56079431 | 2281 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 | 2282 | |
1da177e4 LT |
2283 | extern int netif_rx(struct sk_buff *skb); |
2284 | extern int netif_rx_ni(struct sk_buff *skb); | |
1da177e4 | 2285 | extern int netif_receive_skb(struct sk_buff *skb); |
c7c4b3b6 | 2286 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, |
d565b0a1 | 2287 | struct sk_buff *skb); |
2e71a6f8 | 2288 | extern void napi_gro_flush(struct napi_struct *napi, bool flush_old); |
76620aaf | 2289 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
c7c4b3b6 | 2290 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
76620aaf HX |
2291 | |
2292 | static inline void napi_free_frags(struct napi_struct *napi) | |
2293 | { | |
2294 | kfree_skb(napi->skb); | |
2295 | napi->skb = NULL; | |
2296 | } | |
2297 | ||
ab95bfe0 | 2298 | extern int netdev_rx_handler_register(struct net_device *dev, |
93e2c32b JP |
2299 | rx_handler_func_t *rx_handler, |
2300 | void *rx_handler_data); | |
ab95bfe0 JP |
2301 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
2302 | ||
95f050bf | 2303 | extern bool dev_valid_name(const char *name); |
881d966b EB |
2304 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
2305 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
95c96174 | 2306 | extern unsigned int dev_get_flags(const struct net_device *); |
bd380811 | 2307 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
95c96174 | 2308 | extern int dev_change_flags(struct net_device *, unsigned int); |
bd380811 | 2309 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
cf04a4c7 | 2310 | extern int dev_change_name(struct net_device *, const char *); |
0b815a1a | 2311 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
ce286d32 EB |
2312 | extern int dev_change_net_namespace(struct net_device *, |
2313 | struct net *, const char *); | |
1da177e4 | 2314 | extern int dev_set_mtu(struct net_device *, int); |
cbda10fa | 2315 | extern void dev_set_group(struct net_device *, int); |
1da177e4 LT |
2316 | extern int dev_set_mac_address(struct net_device *, |
2317 | struct sockaddr *); | |
4bf84c35 JP |
2318 | extern int dev_change_carrier(struct net_device *, |
2319 | bool new_carrier); | |
f6a78bfc | 2320 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
fd2ea0a7 DM |
2321 | struct net_device *dev, |
2322 | struct netdev_queue *txq); | |
44540960 AB |
2323 | extern int dev_forward_skb(struct net_device *dev, |
2324 | struct sk_buff *skb); | |
1da177e4 | 2325 | |
20380731 | 2326 | extern int netdev_budget; |
1da177e4 LT |
2327 | |
2328 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
2329 | extern void netdev_run_todo(void); | |
2330 | ||
bea3348e SH |
2331 | /** |
2332 | * dev_put - release reference to device | |
2333 | * @dev: network device | |
2334 | * | |
9ef4429b | 2335 | * Release reference to device to allow it to be freed. |
bea3348e | 2336 | */ |
1da177e4 LT |
2337 | static inline void dev_put(struct net_device *dev) |
2338 | { | |
933393f5 | 2339 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2340 | } |
2341 | ||
bea3348e SH |
2342 | /** |
2343 | * dev_hold - get reference to device | |
2344 | * @dev: network device | |
2345 | * | |
9ef4429b | 2346 | * Hold reference to device to keep it from being freed. |
bea3348e | 2347 | */ |
15333061 SH |
2348 | static inline void dev_hold(struct net_device *dev) |
2349 | { | |
933393f5 | 2350 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2351 | } |
1da177e4 LT |
2352 | |
2353 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2354 | * and _off may be called from IRQ context, but it is caller | |
2355 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2356 | * |
2357 | * The name carrier is inappropriate, these functions should really be | |
2358 | * called netif_lowerlayer_*() because they represent the state of any | |
2359 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2360 | */ |
2361 | ||
8f4cccbb | 2362 | extern void linkwatch_init_dev(struct net_device *dev); |
1da177e4 | 2363 | extern void linkwatch_fire_event(struct net_device *dev); |
e014debe | 2364 | extern void linkwatch_forget_dev(struct net_device *dev); |
1da177e4 | 2365 | |
bea3348e SH |
2366 | /** |
2367 | * netif_carrier_ok - test if carrier present | |
2368 | * @dev: network device | |
2369 | * | |
2370 | * Check if carrier is present on device | |
2371 | */ | |
4d29515f | 2372 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
2373 | { |
2374 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
2375 | } | |
2376 | ||
9d21493b ED |
2377 | extern unsigned long dev_trans_start(struct net_device *dev); |
2378 | ||
1da177e4 LT |
2379 | extern void __netdev_watchdog_up(struct net_device *dev); |
2380 | ||
0a242efc | 2381 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 2382 | |
0a242efc | 2383 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 2384 | |
bea3348e SH |
2385 | /** |
2386 | * netif_dormant_on - mark device as dormant. | |
2387 | * @dev: network device | |
2388 | * | |
2389 | * Mark device as dormant (as per RFC2863). | |
2390 | * | |
2391 | * The dormant state indicates that the relevant interface is not | |
2392 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
2393 | * in a "pending" state, waiting for some external event. For "on- | |
2394 | * demand" interfaces, this new state identifies the situation where the | |
2395 | * interface is waiting for events to place it in the up state. | |
2396 | * | |
2397 | */ | |
b00055aa SR |
2398 | static inline void netif_dormant_on(struct net_device *dev) |
2399 | { | |
2400 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2401 | linkwatch_fire_event(dev); | |
2402 | } | |
2403 | ||
bea3348e SH |
2404 | /** |
2405 | * netif_dormant_off - set device as not dormant. | |
2406 | * @dev: network device | |
2407 | * | |
2408 | * Device is not in dormant state. | |
2409 | */ | |
b00055aa SR |
2410 | static inline void netif_dormant_off(struct net_device *dev) |
2411 | { | |
2412 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2413 | linkwatch_fire_event(dev); | |
2414 | } | |
2415 | ||
bea3348e SH |
2416 | /** |
2417 | * netif_dormant - test if carrier present | |
2418 | * @dev: network device | |
2419 | * | |
2420 | * Check if carrier is present on device | |
2421 | */ | |
4d29515f | 2422 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
2423 | { |
2424 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
2425 | } | |
2426 | ||
2427 | ||
bea3348e SH |
2428 | /** |
2429 | * netif_oper_up - test if device is operational | |
2430 | * @dev: network device | |
2431 | * | |
2432 | * Check if carrier is operational | |
2433 | */ | |
4d29515f | 2434 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 2435 | { |
b00055aa SR |
2436 | return (dev->operstate == IF_OPER_UP || |
2437 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
2438 | } | |
2439 | ||
bea3348e SH |
2440 | /** |
2441 | * netif_device_present - is device available or removed | |
2442 | * @dev: network device | |
2443 | * | |
2444 | * Check if device has not been removed from system. | |
2445 | */ | |
4d29515f | 2446 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
2447 | { |
2448 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
2449 | } | |
2450 | ||
56079431 | 2451 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 2452 | |
56079431 | 2453 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
2454 | |
2455 | /* | |
2456 | * Network interface message level settings | |
2457 | */ | |
1da177e4 LT |
2458 | |
2459 | enum { | |
2460 | NETIF_MSG_DRV = 0x0001, | |
2461 | NETIF_MSG_PROBE = 0x0002, | |
2462 | NETIF_MSG_LINK = 0x0004, | |
2463 | NETIF_MSG_TIMER = 0x0008, | |
2464 | NETIF_MSG_IFDOWN = 0x0010, | |
2465 | NETIF_MSG_IFUP = 0x0020, | |
2466 | NETIF_MSG_RX_ERR = 0x0040, | |
2467 | NETIF_MSG_TX_ERR = 0x0080, | |
2468 | NETIF_MSG_TX_QUEUED = 0x0100, | |
2469 | NETIF_MSG_INTR = 0x0200, | |
2470 | NETIF_MSG_TX_DONE = 0x0400, | |
2471 | NETIF_MSG_RX_STATUS = 0x0800, | |
2472 | NETIF_MSG_PKTDATA = 0x1000, | |
2473 | NETIF_MSG_HW = 0x2000, | |
2474 | NETIF_MSG_WOL = 0x4000, | |
2475 | }; | |
2476 | ||
2477 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
2478 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
2479 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
2480 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
2481 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
2482 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
2483 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
2484 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
2485 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
2486 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
2487 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
2488 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
2489 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
2490 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
2491 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
2492 | ||
2493 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
2494 | { | |
2495 | /* use default */ | |
2496 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
2497 | return default_msg_enable_bits; | |
2498 | if (debug_value == 0) /* no output */ | |
2499 | return 0; | |
2500 | /* set low N bits */ | |
2501 | return (1 << debug_value) - 1; | |
2502 | } | |
2503 | ||
c773e847 | 2504 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 2505 | { |
c773e847 DM |
2506 | spin_lock(&txq->_xmit_lock); |
2507 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
2508 | } |
2509 | ||
fd2ea0a7 DM |
2510 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2511 | { | |
2512 | spin_lock_bh(&txq->_xmit_lock); | |
2513 | txq->xmit_lock_owner = smp_processor_id(); | |
2514 | } | |
2515 | ||
4d29515f | 2516 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 2517 | { |
4d29515f | 2518 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
2519 | if (likely(ok)) |
2520 | txq->xmit_lock_owner = smp_processor_id(); | |
2521 | return ok; | |
2522 | } | |
2523 | ||
2524 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
2525 | { | |
2526 | txq->xmit_lock_owner = -1; | |
2527 | spin_unlock(&txq->_xmit_lock); | |
2528 | } | |
2529 | ||
2530 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
2531 | { | |
2532 | txq->xmit_lock_owner = -1; | |
2533 | spin_unlock_bh(&txq->_xmit_lock); | |
2534 | } | |
2535 | ||
08baf561 ED |
2536 | static inline void txq_trans_update(struct netdev_queue *txq) |
2537 | { | |
2538 | if (txq->xmit_lock_owner != -1) | |
2539 | txq->trans_start = jiffies; | |
2540 | } | |
2541 | ||
d29f749e DJ |
2542 | /** |
2543 | * netif_tx_lock - grab network device transmit lock | |
2544 | * @dev: network device | |
d29f749e DJ |
2545 | * |
2546 | * Get network device transmit lock | |
2547 | */ | |
22dd7495 JHS |
2548 | static inline void netif_tx_lock(struct net_device *dev) |
2549 | { | |
e8a0464c | 2550 | unsigned int i; |
c3f26a26 | 2551 | int cpu; |
c773e847 | 2552 | |
c3f26a26 DM |
2553 | spin_lock(&dev->tx_global_lock); |
2554 | cpu = smp_processor_id(); | |
e8a0464c DM |
2555 | for (i = 0; i < dev->num_tx_queues; i++) { |
2556 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2557 | |
2558 | /* We are the only thread of execution doing a | |
2559 | * freeze, but we have to grab the _xmit_lock in | |
2560 | * order to synchronize with threads which are in | |
2561 | * the ->hard_start_xmit() handler and already | |
2562 | * checked the frozen bit. | |
2563 | */ | |
e8a0464c | 2564 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
2565 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2566 | __netif_tx_unlock(txq); | |
e8a0464c | 2567 | } |
932ff279 HX |
2568 | } |
2569 | ||
2570 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
2571 | { | |
e8a0464c DM |
2572 | local_bh_disable(); |
2573 | netif_tx_lock(dev); | |
932ff279 HX |
2574 | } |
2575 | ||
932ff279 HX |
2576 | static inline void netif_tx_unlock(struct net_device *dev) |
2577 | { | |
e8a0464c DM |
2578 | unsigned int i; |
2579 | ||
2580 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2581 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2582 | |
c3f26a26 DM |
2583 | /* No need to grab the _xmit_lock here. If the |
2584 | * queue is not stopped for another reason, we | |
2585 | * force a schedule. | |
2586 | */ | |
2587 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2588 | netif_schedule_queue(txq); |
c3f26a26 DM |
2589 | } |
2590 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2591 | } |
2592 | ||
2593 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2594 | { | |
e8a0464c DM |
2595 | netif_tx_unlock(dev); |
2596 | local_bh_enable(); | |
932ff279 HX |
2597 | } |
2598 | ||
c773e847 | 2599 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2600 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2601 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2602 | } \ |
2603 | } | |
2604 | ||
c773e847 | 2605 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2606 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2607 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2608 | } \ |
2609 | } | |
2610 | ||
1da177e4 LT |
2611 | static inline void netif_tx_disable(struct net_device *dev) |
2612 | { | |
fd2ea0a7 | 2613 | unsigned int i; |
c3f26a26 | 2614 | int cpu; |
fd2ea0a7 | 2615 | |
c3f26a26 DM |
2616 | local_bh_disable(); |
2617 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2618 | for (i = 0; i < dev->num_tx_queues; i++) { |
2619 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2620 | |
2621 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2622 | netif_tx_stop_queue(txq); |
c3f26a26 | 2623 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2624 | } |
c3f26a26 | 2625 | local_bh_enable(); |
1da177e4 LT |
2626 | } |
2627 | ||
e308a5d8 DM |
2628 | static inline void netif_addr_lock(struct net_device *dev) |
2629 | { | |
2630 | spin_lock(&dev->addr_list_lock); | |
2631 | } | |
2632 | ||
2429f7ac JP |
2633 | static inline void netif_addr_lock_nested(struct net_device *dev) |
2634 | { | |
2635 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); | |
2636 | } | |
2637 | ||
e308a5d8 DM |
2638 | static inline void netif_addr_lock_bh(struct net_device *dev) |
2639 | { | |
2640 | spin_lock_bh(&dev->addr_list_lock); | |
2641 | } | |
2642 | ||
2643 | static inline void netif_addr_unlock(struct net_device *dev) | |
2644 | { | |
2645 | spin_unlock(&dev->addr_list_lock); | |
2646 | } | |
2647 | ||
2648 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2649 | { | |
2650 | spin_unlock_bh(&dev->addr_list_lock); | |
2651 | } | |
2652 | ||
f001fde5 | 2653 | /* |
31278e71 | 2654 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2655 | * rcu_read_lock held. |
2656 | */ | |
2657 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2658 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2659 | |
1da177e4 LT |
2660 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2661 | ||
2662 | extern void ether_setup(struct net_device *dev); | |
2663 | ||
2664 | /* Support for loadable net-drivers */ | |
36909ea4 | 2665 | extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
f25f4e44 | 2666 | void (*setup)(struct net_device *), |
36909ea4 | 2667 | unsigned int txqs, unsigned int rxqs); |
f25f4e44 | 2668 | #define alloc_netdev(sizeof_priv, name, setup) \ |
36909ea4 TH |
2669 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2670 | ||
2671 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ | |
2672 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) | |
2673 | ||
1da177e4 LT |
2674 | extern int register_netdev(struct net_device *dev); |
2675 | extern void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2676 | |
22bedad3 JP |
2677 | /* General hardware address lists handling functions */ |
2678 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
2679 | struct netdev_hw_addr_list *from_list, | |
2680 | int addr_len, unsigned char addr_type); | |
2681 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
2682 | struct netdev_hw_addr_list *from_list, | |
2683 | int addr_len, unsigned char addr_type); | |
2684 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
2685 | struct netdev_hw_addr_list *from_list, | |
2686 | int addr_len); | |
2687 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2688 | struct netdev_hw_addr_list *from_list, | |
2689 | int addr_len); | |
2690 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
2691 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
2692 | ||
f001fde5 | 2693 | /* Functions used for device addresses handling */ |
6b6e2725 | 2694 | extern int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
f001fde5 | 2695 | unsigned char addr_type); |
6b6e2725 | 2696 | extern int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
f001fde5 JP |
2697 | unsigned char addr_type); |
2698 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
2699 | struct net_device *from_dev, | |
2700 | unsigned char addr_type); | |
2701 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
2702 | struct net_device *from_dev, | |
2703 | unsigned char addr_type); | |
a748ee24 JP |
2704 | extern void dev_addr_flush(struct net_device *dev); |
2705 | extern int dev_addr_init(struct net_device *dev); | |
2706 | ||
2707 | /* Functions used for unicast addresses handling */ | |
6b6e2725 | 2708 | extern int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
2709 | extern int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
2710 | extern int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
a748ee24 | 2711 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); |
4cd729b0 | 2712 | extern int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); |
a748ee24 JP |
2713 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); |
2714 | extern void dev_uc_flush(struct net_device *dev); | |
2715 | extern void dev_uc_init(struct net_device *dev); | |
f001fde5 | 2716 | |
22bedad3 | 2717 | /* Functions used for multicast addresses handling */ |
6b6e2725 | 2718 | extern int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
2719 | extern int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
2720 | extern int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
2721 | extern int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
2722 | extern int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
22bedad3 | 2723 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); |
4cd729b0 | 2724 | extern int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); |
22bedad3 JP |
2725 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); |
2726 | extern void dev_mc_flush(struct net_device *dev); | |
2727 | extern void dev_mc_init(struct net_device *dev); | |
f001fde5 | 2728 | |
4417da66 PM |
2729 | /* Functions used for secondary unicast and multicast support */ |
2730 | extern void dev_set_rx_mode(struct net_device *dev); | |
2731 | extern void __dev_set_rx_mode(struct net_device *dev); | |
dad9b335 WC |
2732 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
2733 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 2734 | extern void netdev_state_change(struct net_device *dev); |
ee89bab1 | 2735 | extern void netdev_notify_peers(struct net_device *dev); |
d8a33ac4 | 2736 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 2737 | /* Load a device via the kmod */ |
881d966b | 2738 | extern void dev_load(struct net *net, const char *name); |
d7753516 BH |
2739 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
2740 | struct rtnl_link_stats64 *storage); | |
77a1abf5 ED |
2741 | extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
2742 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 2743 | |
1da177e4 | 2744 | extern int netdev_max_backlog; |
3b098e2d | 2745 | extern int netdev_tstamp_prequeue; |
1da177e4 | 2746 | extern int weight_p; |
0a14842f | 2747 | extern int bpf_jit_enable; |
9ff162a8 JP |
2748 | |
2749 | extern bool netdev_has_upper_dev(struct net_device *dev, | |
2750 | struct net_device *upper_dev); | |
2751 | extern bool netdev_has_any_upper_dev(struct net_device *dev); | |
2752 | extern struct net_device *netdev_master_upper_dev_get(struct net_device *dev); | |
2753 | extern struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
2754 | extern int netdev_upper_dev_link(struct net_device *dev, | |
2755 | struct net_device *upper_dev); | |
2756 | extern int netdev_master_upper_dev_link(struct net_device *dev, | |
2757 | struct net_device *upper_dev); | |
2758 | extern void netdev_upper_dev_unlink(struct net_device *dev, | |
2759 | struct net_device *upper_dev); | |
84fa7933 | 2760 | extern int skb_checksum_help(struct sk_buff *skb); |
12b0004d CW |
2761 | extern struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
2762 | netdev_features_t features, bool tx_path); | |
05e8ef4a PS |
2763 | extern struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, |
2764 | netdev_features_t features); | |
12b0004d CW |
2765 | |
2766 | static inline | |
2767 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
2768 | { | |
2769 | return __skb_gso_segment(skb, features, true); | |
2770 | } | |
ec5f0615 PS |
2771 | __be16 skb_network_protocol(struct sk_buff *skb); |
2772 | ||
2773 | static inline bool can_checksum_protocol(netdev_features_t features, | |
2774 | __be16 protocol) | |
2775 | { | |
2776 | return ((features & NETIF_F_GEN_CSUM) || | |
2777 | ((features & NETIF_F_V4_CSUM) && | |
2778 | protocol == htons(ETH_P_IP)) || | |
2779 | ((features & NETIF_F_V6_CSUM) && | |
2780 | protocol == htons(ETH_P_IPV6)) || | |
2781 | ((features & NETIF_F_FCOE_CRC) && | |
2782 | protocol == htons(ETH_P_FCOE))); | |
2783 | } | |
12b0004d | 2784 | |
fb286bb2 HX |
2785 | #ifdef CONFIG_BUG |
2786 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2787 | #else | |
2788 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2789 | { | |
2790 | } | |
2791 | #endif | |
1da177e4 LT |
2792 | /* rx skb timestamps */ |
2793 | extern void net_enable_timestamp(void); | |
2794 | extern void net_disable_timestamp(void); | |
2795 | ||
20380731 | 2796 | #ifdef CONFIG_PROC_FS |
900ff8c6 CW |
2797 | extern int __init dev_proc_init(void); |
2798 | #else | |
2799 | #define dev_proc_init() 0 | |
20380731 ACM |
2800 | #endif |
2801 | ||
b8a9787e JV |
2802 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
2803 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2804 | ||
04600794 JB |
2805 | extern struct kobj_ns_type_operations net_ns_type_operations; |
2806 | ||
3019de12 | 2807 | extern const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 2808 | |
20380731 ACM |
2809 | extern void linkwatch_run_queue(void); |
2810 | ||
c8f44aff MM |
2811 | static inline netdev_features_t netdev_get_wanted_features( |
2812 | struct net_device *dev) | |
5455c699 MM |
2813 | { |
2814 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
2815 | } | |
c8f44aff MM |
2816 | netdev_features_t netdev_increment_features(netdev_features_t all, |
2817 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
2818 | |
2819 | /* Allow TSO being used on stacked device : | |
2820 | * Performing the GSO segmentation before last device | |
2821 | * is a performance improvement. | |
2822 | */ | |
2823 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
2824 | netdev_features_t mask) | |
2825 | { | |
2826 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
2827 | } | |
2828 | ||
6cb6a27c | 2829 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 2830 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 2831 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 2832 | |
fc4a7489 PM |
2833 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2834 | struct net_device *dev); | |
2835 | ||
c8f44aff | 2836 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 2837 | |
4d29515f | 2838 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 2839 | { |
c8f44aff | 2840 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
2841 | |
2842 | /* check flags correspondence */ | |
2843 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
2844 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
2845 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
2846 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
2847 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
2848 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
2849 | ||
d6b4991a | 2850 | return (features & feature) == feature; |
576a30eb HX |
2851 | } |
2852 | ||
4d29515f | 2853 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 2854 | { |
278b2513 | 2855 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 2856 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
2857 | } |
2858 | ||
4d29515f DM |
2859 | static inline bool netif_needs_gso(struct sk_buff *skb, |
2860 | netdev_features_t features) | |
7967168c | 2861 | { |
fc741216 | 2862 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
2863 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
2864 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
2865 | } |
2866 | ||
82cc1a7a PWJ |
2867 | static inline void netif_set_gso_max_size(struct net_device *dev, |
2868 | unsigned int size) | |
2869 | { | |
2870 | dev->gso_max_size = size; | |
2871 | } | |
2872 | ||
8a7fbfab | 2873 | static inline bool netif_is_bond_master(struct net_device *dev) |
2874 | { | |
2875 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
2876 | } | |
2877 | ||
4d29515f | 2878 | static inline bool netif_is_bond_slave(struct net_device *dev) |
1765a575 JP |
2879 | { |
2880 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
2881 | } | |
2882 | ||
3bdc0eba BG |
2883 | static inline bool netif_supports_nofcs(struct net_device *dev) |
2884 | { | |
2885 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
2886 | } | |
2887 | ||
505d4f73 | 2888 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 2889 | |
571ba423 JP |
2890 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
2891 | ||
2892 | /* netdev_printk helpers, similar to dev_printk */ | |
2893 | ||
2894 | static inline const char *netdev_name(const struct net_device *dev) | |
2895 | { | |
2896 | if (dev->reg_state != NETREG_REGISTERED) | |
2897 | return "(unregistered net_device)"; | |
2898 | return dev->name; | |
2899 | } | |
2900 | ||
b9075fa9 JP |
2901 | extern __printf(3, 4) |
2902 | int netdev_printk(const char *level, const struct net_device *dev, | |
2903 | const char *format, ...); | |
2904 | extern __printf(2, 3) | |
2905 | int netdev_emerg(const struct net_device *dev, const char *format, ...); | |
2906 | extern __printf(2, 3) | |
2907 | int netdev_alert(const struct net_device *dev, const char *format, ...); | |
2908 | extern __printf(2, 3) | |
2909 | int netdev_crit(const struct net_device *dev, const char *format, ...); | |
2910 | extern __printf(2, 3) | |
2911 | int netdev_err(const struct net_device *dev, const char *format, ...); | |
2912 | extern __printf(2, 3) | |
2913 | int netdev_warn(const struct net_device *dev, const char *format, ...); | |
2914 | extern __printf(2, 3) | |
2915 | int netdev_notice(const struct net_device *dev, const char *format, ...); | |
2916 | extern __printf(2, 3) | |
2917 | int netdev_info(const struct net_device *dev, const char *format, ...); | |
571ba423 | 2918 | |
8909c9ad VK |
2919 | #define MODULE_ALIAS_NETDEV(device) \ |
2920 | MODULE_ALIAS("netdev-" device) | |
2921 | ||
b558c96f | 2922 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
2923 | #define netdev_dbg(__dev, format, args...) \ |
2924 | do { \ | |
ffa10cb4 | 2925 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 2926 | } while (0) |
b558c96f JC |
2927 | #elif defined(DEBUG) |
2928 | #define netdev_dbg(__dev, format, args...) \ | |
2929 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
2930 | #else |
2931 | #define netdev_dbg(__dev, format, args...) \ | |
2932 | ({ \ | |
2933 | if (0) \ | |
2934 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2935 | 0; \ | |
2936 | }) | |
2937 | #endif | |
2938 | ||
2939 | #if defined(VERBOSE_DEBUG) | |
2940 | #define netdev_vdbg netdev_dbg | |
2941 | #else | |
2942 | ||
2943 | #define netdev_vdbg(dev, format, args...) \ | |
2944 | ({ \ | |
2945 | if (0) \ | |
2946 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2947 | 0; \ | |
2948 | }) | |
2949 | #endif | |
2950 | ||
2951 | /* | |
2952 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2953 | * of using a WARN/WARN_ON to get the message out, including the | |
2954 | * file/line information and a backtrace. | |
2955 | */ | |
2956 | #define netdev_WARN(dev, format, args...) \ | |
2957 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2958 | ||
b3d95c5c JP |
2959 | /* netif printk helpers, similar to netdev_printk */ |
2960 | ||
2961 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2962 | do { \ | |
2963 | if (netif_msg_##type(priv)) \ | |
2964 | netdev_printk(level, (dev), fmt, ##args); \ | |
2965 | } while (0) | |
2966 | ||
f45f4321 JP |
2967 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
2968 | do { \ | |
2969 | if (netif_msg_##type(priv)) \ | |
2970 | netdev_##level(dev, fmt, ##args); \ | |
2971 | } while (0) | |
2972 | ||
b3d95c5c | 2973 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 2974 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 2975 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 2976 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 2977 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 2978 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 2979 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 2980 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 2981 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 2982 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 2983 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 2984 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 2985 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 2986 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 2987 | |
0053ea9c | 2988 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
2989 | #define netif_dbg(priv, type, netdev, format, args...) \ |
2990 | do { \ | |
2991 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 2992 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 2993 | } while (0) |
0053ea9c JP |
2994 | #elif defined(DEBUG) |
2995 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2996 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
2997 | #else |
2998 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2999 | ({ \ | |
3000 | if (0) \ | |
3001 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
3002 | 0; \ | |
3003 | }) | |
3004 | #endif | |
3005 | ||
3006 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 3007 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
3008 | #else |
3009 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
3010 | ({ \ | |
3011 | if (0) \ | |
a4ed89cb | 3012 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
3013 | 0; \ |
3014 | }) | |
3015 | #endif | |
571ba423 | 3016 | |
900ff8c6 CW |
3017 | /* |
3018 | * The list of packet types we will receive (as opposed to discard) | |
3019 | * and the routines to invoke. | |
3020 | * | |
3021 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
3022 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
3023 | * | |
3024 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
3025 | * sure which should go first, but I bet it won't make much | |
3026 | * difference if we are running VLANs. The good news is that | |
3027 | * this protocol won't be in the list unless compiled in, so | |
3028 | * the average user (w/out VLANs) will not be adversely affected. | |
3029 | * --BLG | |
3030 | * | |
3031 | * 0800 IP | |
3032 | * 8100 802.1Q VLAN | |
3033 | * 0001 802.3 | |
3034 | * 0002 AX.25 | |
3035 | * 0004 802.2 | |
3036 | * 8035 RARP | |
3037 | * 0005 SNAP | |
3038 | * 0805 X.25 | |
3039 | * 0806 ARP | |
3040 | * 8137 IPX | |
3041 | * 0009 Localtalk | |
3042 | * 86DD IPv6 | |
3043 | */ | |
3044 | #define PTYPE_HASH_SIZE (16) | |
3045 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
3046 | ||
385a154c | 3047 | #endif /* _LINUX_NETDEVICE_H */ |