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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 | 59 | |
f629d208 JP |
60 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
61 | const struct ethtool_ops *ops); | |
d07d7507 | 62 | |
9a1654ba JP |
63 | /* Backlog congestion levels */ |
64 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
65 | #define NET_RX_DROP 1 /* packet dropped */ | |
66 | ||
572a9d7b PM |
67 | /* |
68 | * Transmit return codes: transmit return codes originate from three different | |
69 | * namespaces: | |
70 | * | |
71 | * - qdisc return codes | |
72 | * - driver transmit return codes | |
73 | * - errno values | |
74 | * | |
75 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
76 | * function. Real network devices commonly used with qdiscs should only return | |
77 | * the driver transmit return codes though - when qdiscs are used, the actual | |
78 | * transmission happens asynchronously, so the value is not propagated to | |
79 | * higher layers. Virtual network devices transmit synchronously, in this case | |
80 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
81 | * others are propagated to higher layers. | |
82 | */ | |
83 | ||
84 | /* qdisc ->enqueue() return codes. */ | |
85 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
86 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
87 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
88 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
89 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 90 | |
b9df3cb8 GR |
91 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
92 | * indicates that the device will soon be dropping packets, or already drops | |
93 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 94 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
95 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
96 | ||
dc1f8bf6 | 97 | /* Driver transmit return codes */ |
9a1654ba | 98 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 99 | |
dc1f8bf6 | 100 | enum netdev_tx { |
572a9d7b | 101 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
102 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
103 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
104 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
105 | }; |
106 | typedef enum netdev_tx netdev_tx_t; | |
107 | ||
9a1654ba JP |
108 | /* |
109 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
110 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
111 | */ | |
112 | static inline bool dev_xmit_complete(int rc) | |
113 | { | |
114 | /* | |
115 | * Positive cases with an skb consumed by a driver: | |
116 | * - successful transmission (rc == NETDEV_TX_OK) | |
117 | * - error while transmitting (rc < 0) | |
118 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
119 | */ | |
120 | if (likely(rc < NET_XMIT_MASK)) | |
121 | return true; | |
122 | ||
123 | return false; | |
124 | } | |
125 | ||
1da177e4 LT |
126 | /* |
127 | * Compute the worst case header length according to the protocols | |
128 | * used. | |
129 | */ | |
fe2918b0 | 130 | |
d11ead75 | 131 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
8388e3da DM |
132 | # if defined(CONFIG_MAC80211_MESH) |
133 | # define LL_MAX_HEADER 128 | |
134 | # else | |
135 | # define LL_MAX_HEADER 96 | |
136 | # endif | |
1da177e4 | 137 | #else |
8388e3da | 138 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
139 | #endif |
140 | ||
d11ead75 BH |
141 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
142 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
143 | #define MAX_HEADER LL_MAX_HEADER |
144 | #else | |
145 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
146 | #endif | |
147 | ||
148 | /* | |
be1f3c2c BH |
149 | * Old network device statistics. Fields are native words |
150 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 151 | */ |
fe2918b0 | 152 | |
d94d9fee | 153 | struct net_device_stats { |
3cfde79c BH |
154 | unsigned long rx_packets; |
155 | unsigned long tx_packets; | |
156 | unsigned long rx_bytes; | |
157 | unsigned long tx_bytes; | |
158 | unsigned long rx_errors; | |
159 | unsigned long tx_errors; | |
160 | unsigned long rx_dropped; | |
161 | unsigned long tx_dropped; | |
162 | unsigned long multicast; | |
1da177e4 | 163 | unsigned long collisions; |
1da177e4 | 164 | unsigned long rx_length_errors; |
3cfde79c BH |
165 | unsigned long rx_over_errors; |
166 | unsigned long rx_crc_errors; | |
167 | unsigned long rx_frame_errors; | |
168 | unsigned long rx_fifo_errors; | |
169 | unsigned long rx_missed_errors; | |
1da177e4 LT |
170 | unsigned long tx_aborted_errors; |
171 | unsigned long tx_carrier_errors; | |
172 | unsigned long tx_fifo_errors; | |
173 | unsigned long tx_heartbeat_errors; | |
174 | unsigned long tx_window_errors; | |
1da177e4 LT |
175 | unsigned long rx_compressed; |
176 | unsigned long tx_compressed; | |
177 | }; | |
178 | ||
1da177e4 LT |
179 | |
180 | #include <linux/cache.h> | |
181 | #include <linux/skbuff.h> | |
182 | ||
adc9300e | 183 | #ifdef CONFIG_RPS |
c5905afb IM |
184 | #include <linux/static_key.h> |
185 | extern struct static_key rps_needed; | |
adc9300e ED |
186 | #endif |
187 | ||
1da177e4 LT |
188 | struct neighbour; |
189 | struct neigh_parms; | |
190 | struct sk_buff; | |
191 | ||
f001fde5 JP |
192 | struct netdev_hw_addr { |
193 | struct list_head list; | |
194 | unsigned char addr[MAX_ADDR_LEN]; | |
195 | unsigned char type; | |
ccffad25 JP |
196 | #define NETDEV_HW_ADDR_T_LAN 1 |
197 | #define NETDEV_HW_ADDR_T_SAN 2 | |
198 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
199 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 200 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 201 | bool global_use; |
4cd729b0 | 202 | int sync_cnt; |
8f8f103d | 203 | int refcount; |
4543fbef | 204 | int synced; |
f001fde5 JP |
205 | struct rcu_head rcu_head; |
206 | }; | |
207 | ||
31278e71 JP |
208 | struct netdev_hw_addr_list { |
209 | struct list_head list; | |
210 | int count; | |
211 | }; | |
212 | ||
22bedad3 JP |
213 | #define netdev_hw_addr_list_count(l) ((l)->count) |
214 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
215 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
216 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 217 | |
22bedad3 JP |
218 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
219 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
220 | #define netdev_for_each_uc_addr(ha, dev) \ | |
221 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 222 | |
22bedad3 JP |
223 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
224 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 225 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 226 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 227 | |
d94d9fee | 228 | struct hh_cache { |
f6b72b62 | 229 | u16 hh_len; |
5c25f686 | 230 | u16 __pad; |
3644f0ce | 231 | seqlock_t hh_lock; |
1da177e4 LT |
232 | |
233 | /* cached hardware header; allow for machine alignment needs. */ | |
234 | #define HH_DATA_MOD 16 | |
235 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 236 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
237 | #define HH_DATA_ALIGN(__len) \ |
238 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
239 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
240 | }; | |
241 | ||
242 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
243 | * Alternative is: | |
244 | * dev->hard_header_len ? (dev->hard_header_len + | |
245 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
246 | * | |
247 | * We could use other alignment values, but we must maintain the | |
248 | * relationship HH alignment <= LL alignment. | |
249 | */ | |
250 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 251 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 252 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 253 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 254 | |
3b04ddde SH |
255 | struct header_ops { |
256 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
257 | unsigned short type, const void *daddr, | |
95c96174 | 258 | const void *saddr, unsigned int len); |
3b04ddde SH |
259 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
260 | int (*rebuild)(struct sk_buff *skb); | |
e69dd336 | 261 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
262 | void (*cache_update)(struct hh_cache *hh, |
263 | const struct net_device *dev, | |
264 | const unsigned char *haddr); | |
265 | }; | |
266 | ||
1da177e4 LT |
267 | /* These flag bits are private to the generic network queueing |
268 | * layer, they may not be explicitly referenced by any other | |
269 | * code. | |
270 | */ | |
271 | ||
d94d9fee | 272 | enum netdev_state_t { |
1da177e4 LT |
273 | __LINK_STATE_START, |
274 | __LINK_STATE_PRESENT, | |
1da177e4 | 275 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
276 | __LINK_STATE_LINKWATCH_PENDING, |
277 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
278 | }; |
279 | ||
280 | ||
281 | /* | |
282 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 283 | * are then used in the device probing. |
1da177e4 LT |
284 | */ |
285 | struct netdev_boot_setup { | |
286 | char name[IFNAMSIZ]; | |
287 | struct ifmap map; | |
288 | }; | |
289 | #define NETDEV_BOOT_SETUP_MAX 8 | |
290 | ||
f629d208 | 291 | int __init netdev_boot_setup(char *str); |
1da177e4 | 292 | |
bea3348e SH |
293 | /* |
294 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
295 | */ | |
296 | struct napi_struct { | |
297 | /* The poll_list must only be managed by the entity which | |
298 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
299 | * whoever atomically sets that bit can add this napi_struct | |
300 | * to the per-cpu poll_list, and whoever clears that bit | |
301 | * can remove from the list right before clearing the bit. | |
302 | */ | |
303 | struct list_head poll_list; | |
304 | ||
305 | unsigned long state; | |
306 | int weight; | |
404f7c9e | 307 | unsigned int gro_count; |
bea3348e SH |
308 | int (*poll)(struct napi_struct *, int); |
309 | #ifdef CONFIG_NETPOLL | |
310 | spinlock_t poll_lock; | |
311 | int poll_owner; | |
bea3348e | 312 | #endif |
5d38a079 | 313 | struct net_device *dev; |
d565b0a1 | 314 | struct sk_buff *gro_list; |
5d38a079 | 315 | struct sk_buff *skb; |
404f7c9e | 316 | struct list_head dev_list; |
af12fa6e ET |
317 | struct hlist_node napi_hash_node; |
318 | unsigned int napi_id; | |
bea3348e SH |
319 | }; |
320 | ||
d94d9fee | 321 | enum { |
bea3348e | 322 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 323 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 324 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
af12fa6e | 325 | NAPI_STATE_HASHED, /* In NAPI hash */ |
bea3348e SH |
326 | }; |
327 | ||
5b252f0c | 328 | enum gro_result { |
d1c76af9 HX |
329 | GRO_MERGED, |
330 | GRO_MERGED_FREE, | |
331 | GRO_HELD, | |
332 | GRO_NORMAL, | |
333 | GRO_DROP, | |
334 | }; | |
5b252f0c | 335 | typedef enum gro_result gro_result_t; |
d1c76af9 | 336 | |
8a4eb573 JP |
337 | /* |
338 | * enum rx_handler_result - Possible return values for rx_handlers. | |
339 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
340 | * further. | |
341 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
342 | * case skb->dev was changed by rx_handler. | |
343 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
344 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
345 | * | |
346 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
347 | * special processing of the skb, prior to delivery to protocol handlers. | |
348 | * | |
349 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
350 | * to register a second rx_handler will return -EBUSY. | |
351 | * | |
352 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
353 | * To unregister a rx_handler on a net_device, use | |
354 | * netdev_rx_handler_unregister(). | |
355 | * | |
356 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
357 | * do with the skb. | |
358 | * | |
359 | * If the rx_handler consumed to skb in some way, it should return | |
360 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
361 | * the skb to be delivered in some other ways. | |
362 | * | |
363 | * If the rx_handler changed skb->dev, to divert the skb to another | |
364 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
365 | * new device will be called if it exists. | |
366 | * | |
367 | * If the rx_handler consider the skb should be ignored, it should return | |
368 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
d93cf068 | 369 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 JP |
370 | * |
371 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
372 | * delivered, it should return RX_HANDLER_PASS. | |
373 | * | |
374 | * A device without a registered rx_handler will behave as if rx_handler | |
375 | * returned RX_HANDLER_PASS. | |
376 | */ | |
377 | ||
378 | enum rx_handler_result { | |
379 | RX_HANDLER_CONSUMED, | |
380 | RX_HANDLER_ANOTHER, | |
381 | RX_HANDLER_EXACT, | |
382 | RX_HANDLER_PASS, | |
383 | }; | |
384 | typedef enum rx_handler_result rx_handler_result_t; | |
385 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 386 | |
f629d208 | 387 | void __napi_schedule(struct napi_struct *n); |
bea3348e | 388 | |
4d29515f | 389 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
390 | { |
391 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
392 | } | |
393 | ||
bea3348e SH |
394 | /** |
395 | * napi_schedule_prep - check if napi can be scheduled | |
396 | * @n: napi context | |
397 | * | |
398 | * Test if NAPI routine is already running, and if not mark | |
399 | * it as running. This is used as a condition variable | |
a0a46196 DM |
400 | * insure only one NAPI poll instance runs. We also make |
401 | * sure there is no pending NAPI disable. | |
bea3348e | 402 | */ |
4d29515f | 403 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 404 | { |
a0a46196 DM |
405 | return !napi_disable_pending(n) && |
406 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
407 | } |
408 | ||
409 | /** | |
410 | * napi_schedule - schedule NAPI poll | |
411 | * @n: napi context | |
412 | * | |
413 | * Schedule NAPI poll routine to be called if it is not already | |
414 | * running. | |
415 | */ | |
416 | static inline void napi_schedule(struct napi_struct *n) | |
417 | { | |
418 | if (napi_schedule_prep(n)) | |
419 | __napi_schedule(n); | |
420 | } | |
421 | ||
bfe13f54 | 422 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 423 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
424 | { |
425 | if (napi_schedule_prep(napi)) { | |
426 | __napi_schedule(napi); | |
4d29515f | 427 | return true; |
bfe13f54 | 428 | } |
4d29515f | 429 | return false; |
bfe13f54 RD |
430 | } |
431 | ||
bea3348e SH |
432 | /** |
433 | * napi_complete - NAPI processing complete | |
434 | * @n: napi context | |
435 | * | |
436 | * Mark NAPI processing as complete. | |
437 | */ | |
f629d208 JP |
438 | void __napi_complete(struct napi_struct *n); |
439 | void napi_complete(struct napi_struct *n); | |
bea3348e | 440 | |
af12fa6e ET |
441 | /** |
442 | * napi_by_id - lookup a NAPI by napi_id | |
443 | * @napi_id: hashed napi_id | |
444 | * | |
445 | * lookup @napi_id in napi_hash table | |
446 | * must be called under rcu_read_lock() | |
447 | */ | |
f629d208 | 448 | struct napi_struct *napi_by_id(unsigned int napi_id); |
af12fa6e ET |
449 | |
450 | /** | |
451 | * napi_hash_add - add a NAPI to global hashtable | |
452 | * @napi: napi context | |
453 | * | |
454 | * generate a new napi_id and store a @napi under it in napi_hash | |
455 | */ | |
f629d208 | 456 | void napi_hash_add(struct napi_struct *napi); |
af12fa6e ET |
457 | |
458 | /** | |
459 | * napi_hash_del - remove a NAPI from global table | |
460 | * @napi: napi context | |
461 | * | |
462 | * Warning: caller must observe rcu grace period | |
463 | * before freeing memory containing @napi | |
464 | */ | |
f629d208 | 465 | void napi_hash_del(struct napi_struct *napi); |
af12fa6e | 466 | |
bea3348e SH |
467 | /** |
468 | * napi_disable - prevent NAPI from scheduling | |
469 | * @n: napi context | |
470 | * | |
471 | * Stop NAPI from being scheduled on this context. | |
472 | * Waits till any outstanding processing completes. | |
473 | */ | |
474 | static inline void napi_disable(struct napi_struct *n) | |
475 | { | |
80c33ddd | 476 | might_sleep(); |
a0a46196 | 477 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 478 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 479 | msleep(1); |
a0a46196 | 480 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
481 | } |
482 | ||
483 | /** | |
484 | * napi_enable - enable NAPI scheduling | |
485 | * @n: napi context | |
486 | * | |
487 | * Resume NAPI from being scheduled on this context. | |
488 | * Must be paired with napi_disable. | |
489 | */ | |
490 | static inline void napi_enable(struct napi_struct *n) | |
491 | { | |
492 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
493 | smp_mb__before_clear_bit(); | |
494 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
495 | } | |
496 | ||
c264c3de SH |
497 | #ifdef CONFIG_SMP |
498 | /** | |
499 | * napi_synchronize - wait until NAPI is not running | |
500 | * @n: napi context | |
501 | * | |
502 | * Wait until NAPI is done being scheduled on this context. | |
503 | * Waits till any outstanding processing completes but | |
504 | * does not disable future activations. | |
505 | */ | |
506 | static inline void napi_synchronize(const struct napi_struct *n) | |
507 | { | |
508 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
509 | msleep(1); | |
510 | } | |
511 | #else | |
512 | # define napi_synchronize(n) barrier() | |
513 | #endif | |
514 | ||
d94d9fee | 515 | enum netdev_queue_state_t { |
73466498 TH |
516 | __QUEUE_STATE_DRV_XOFF, |
517 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 518 | __QUEUE_STATE_FROZEN, |
79d16385 | 519 | }; |
8e2f1a63 DB |
520 | |
521 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
522 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
523 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
524 | ||
525 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
526 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
527 | QUEUE_STATE_FROZEN) | |
528 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
529 | QUEUE_STATE_FROZEN) | |
530 | ||
73466498 TH |
531 | /* |
532 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
533 | * netif_tx_* functions below are used to manipulate this flag. The | |
534 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
535 | * queue independently. The netif_xmit_*stopped functions below are called | |
536 | * to check if the queue has been stopped by the driver or stack (either | |
537 | * of the XOFF bits are set in the state). Drivers should not need to call | |
538 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
539 | */ | |
79d16385 | 540 | |
bb949fbd | 541 | struct netdev_queue { |
6a321cb3 ED |
542 | /* |
543 | * read mostly part | |
544 | */ | |
bb949fbd | 545 | struct net_device *dev; |
b0e1e646 DM |
546 | struct Qdisc *qdisc; |
547 | struct Qdisc *qdisc_sleeping; | |
ccf5ff69 | 548 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
549 | struct kobject kobj; |
550 | #endif | |
f2cd2d3e ED |
551 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
552 | int numa_node; | |
553 | #endif | |
6a321cb3 ED |
554 | /* |
555 | * write mostly part | |
556 | */ | |
557 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
558 | int xmit_lock_owner; | |
9d21493b ED |
559 | /* |
560 | * please use this field instead of dev->trans_start | |
561 | */ | |
562 | unsigned long trans_start; | |
ccf5ff69 | 563 | |
564 | /* | |
565 | * Number of TX timeouts for this queue | |
566 | * (/sys/class/net/DEV/Q/trans_timeout) | |
567 | */ | |
568 | unsigned long trans_timeout; | |
114cf580 TH |
569 | |
570 | unsigned long state; | |
571 | ||
572 | #ifdef CONFIG_BQL | |
573 | struct dql dql; | |
574 | #endif | |
e8a0464c | 575 | } ____cacheline_aligned_in_smp; |
bb949fbd | 576 | |
f2cd2d3e ED |
577 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
578 | { | |
579 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
580 | return q->numa_node; | |
581 | #else | |
b236da69 | 582 | return NUMA_NO_NODE; |
f2cd2d3e ED |
583 | #endif |
584 | } | |
585 | ||
586 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
587 | { | |
588 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
589 | q->numa_node = node; | |
590 | #endif | |
591 | } | |
592 | ||
df334545 | 593 | #ifdef CONFIG_RPS |
0a9627f2 TH |
594 | /* |
595 | * This structure holds an RPS map which can be of variable length. The | |
596 | * map is an array of CPUs. | |
597 | */ | |
598 | struct rps_map { | |
599 | unsigned int len; | |
600 | struct rcu_head rcu; | |
601 | u16 cpus[0]; | |
602 | }; | |
60b778ce | 603 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 604 | |
fec5e652 | 605 | /* |
c445477d BH |
606 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
607 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
608 | * a hardware filter index. | |
fec5e652 TH |
609 | */ |
610 | struct rps_dev_flow { | |
611 | u16 cpu; | |
c445477d | 612 | u16 filter; |
fec5e652 TH |
613 | unsigned int last_qtail; |
614 | }; | |
c445477d | 615 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
616 | |
617 | /* | |
618 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
619 | */ | |
620 | struct rps_dev_flow_table { | |
621 | unsigned int mask; | |
622 | struct rcu_head rcu; | |
fec5e652 TH |
623 | struct rps_dev_flow flows[0]; |
624 | }; | |
625 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 626 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
627 | |
628 | /* | |
629 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
630 | * on which they were processed by the application (set in recvmsg). | |
631 | */ | |
632 | struct rps_sock_flow_table { | |
633 | unsigned int mask; | |
634 | u16 ents[0]; | |
635 | }; | |
636 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
60b778ce | 637 | ((_num) * sizeof(u16))) |
fec5e652 TH |
638 | |
639 | #define RPS_NO_CPU 0xffff | |
640 | ||
641 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
642 | u32 hash) | |
643 | { | |
644 | if (table && hash) { | |
645 | unsigned int cpu, index = hash & table->mask; | |
646 | ||
647 | /* We only give a hint, preemption can change cpu under us */ | |
648 | cpu = raw_smp_processor_id(); | |
649 | ||
650 | if (table->ents[index] != cpu) | |
651 | table->ents[index] = cpu; | |
652 | } | |
653 | } | |
654 | ||
655 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
656 | u32 hash) | |
657 | { | |
658 | if (table && hash) | |
659 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
660 | } | |
661 | ||
6e3f7faf | 662 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
fec5e652 | 663 | |
c445477d | 664 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
665 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
666 | u16 filter_id); | |
c445477d | 667 | #endif |
a953be53 | 668 | #endif /* CONFIG_RPS */ |
c445477d | 669 | |
0a9627f2 TH |
670 | /* This structure contains an instance of an RX queue. */ |
671 | struct netdev_rx_queue { | |
a953be53 | 672 | #ifdef CONFIG_RPS |
6e3f7faf ED |
673 | struct rps_map __rcu *rps_map; |
674 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 675 | #endif |
6e3f7faf | 676 | struct kobject kobj; |
fe822240 | 677 | struct net_device *dev; |
0a9627f2 | 678 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
679 | |
680 | /* | |
681 | * RX queue sysfs structures and functions. | |
682 | */ | |
683 | struct rx_queue_attribute { | |
684 | struct attribute attr; | |
685 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
686 | struct rx_queue_attribute *attr, char *buf); | |
687 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
688 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
689 | }; | |
d314774c | 690 | |
bf264145 TH |
691 | #ifdef CONFIG_XPS |
692 | /* | |
693 | * This structure holds an XPS map which can be of variable length. The | |
694 | * map is an array of queues. | |
695 | */ | |
696 | struct xps_map { | |
697 | unsigned int len; | |
698 | unsigned int alloc_len; | |
699 | struct rcu_head rcu; | |
700 | u16 queues[0]; | |
701 | }; | |
60b778ce | 702 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
bf264145 TH |
703 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
704 | / sizeof(u16)) | |
705 | ||
706 | /* | |
707 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
708 | */ | |
709 | struct xps_dev_maps { | |
710 | struct rcu_head rcu; | |
a4177869 | 711 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
712 | }; |
713 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
714 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
715 | #endif /* CONFIG_XPS */ | |
716 | ||
4f57c087 JF |
717 | #define TC_MAX_QUEUE 16 |
718 | #define TC_BITMASK 15 | |
719 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
720 | struct netdev_tc_txq { | |
721 | u16 count; | |
722 | u16 offset; | |
723 | }; | |
724 | ||
68bad94e NP |
725 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
726 | /* | |
727 | * This structure is to hold information about the device | |
728 | * configured to run FCoE protocol stack. | |
729 | */ | |
730 | struct netdev_fcoe_hbainfo { | |
731 | char manufacturer[64]; | |
732 | char serial_number[64]; | |
733 | char hardware_version[64]; | |
734 | char driver_version[64]; | |
735 | char optionrom_version[64]; | |
736 | char firmware_version[64]; | |
737 | char model[256]; | |
738 | char model_description[256]; | |
739 | }; | |
740 | #endif | |
741 | ||
66b52b0d JP |
742 | #define MAX_PHYS_PORT_ID_LEN 32 |
743 | ||
744 | /* This structure holds a unique identifier to identify the | |
745 | * physical port used by a netdevice. | |
746 | */ | |
747 | struct netdev_phys_port_id { | |
748 | unsigned char id[MAX_PHYS_PORT_ID_LEN]; | |
749 | unsigned char id_len; | |
750 | }; | |
751 | ||
99932d4f DB |
752 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
753 | struct sk_buff *skb); | |
754 | ||
d314774c SH |
755 | /* |
756 | * This structure defines the management hooks for network devices. | |
00829823 SH |
757 | * The following hooks can be defined; unless noted otherwise, they are |
758 | * optional and can be filled with a null pointer. | |
d314774c SH |
759 | * |
760 | * int (*ndo_init)(struct net_device *dev); | |
761 | * This function is called once when network device is registered. | |
762 | * The network device can use this to any late stage initializaton | |
763 | * or semantic validattion. It can fail with an error code which will | |
764 | * be propogated back to register_netdev | |
765 | * | |
766 | * void (*ndo_uninit)(struct net_device *dev); | |
767 | * This function is called when device is unregistered or when registration | |
768 | * fails. It is not called if init fails. | |
769 | * | |
770 | * int (*ndo_open)(struct net_device *dev); | |
771 | * This function is called when network device transistions to the up | |
772 | * state. | |
773 | * | |
774 | * int (*ndo_stop)(struct net_device *dev); | |
775 | * This function is called when network device transistions to the down | |
776 | * state. | |
777 | * | |
dc1f8bf6 SH |
778 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
779 | * struct net_device *dev); | |
00829823 | 780 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
781 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
782 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
783 | * Required can not be NULL. |
784 | * | |
f663dd9a | 785 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 786 | * void *accel_priv, select_queue_fallback_t fallback); |
00829823 SH |
787 | * Called to decide which queue to when device supports multiple |
788 | * transmit queues. | |
789 | * | |
d314774c SH |
790 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
791 | * This function is called to allow device receiver to make | |
792 | * changes to configuration when multicast or promiscious is enabled. | |
793 | * | |
794 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
795 | * This function is called device changes address list filtering. | |
01789349 JP |
796 | * If driver handles unicast address filtering, it should set |
797 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
798 | * |
799 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
800 | * This function is called when the Media Access Control address | |
37b607c5 | 801 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
802 | * mac address can not be changed. |
803 | * | |
804 | * int (*ndo_validate_addr)(struct net_device *dev); | |
805 | * Test if Media Access Control address is valid for the device. | |
806 | * | |
807 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
808 | * Called when a user request an ioctl which can't be handled by | |
809 | * the generic interface code. If not defined ioctl's return | |
810 | * not supported error code. | |
811 | * | |
812 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
813 | * Used to set network devices bus interface parameters. This interface | |
814 | * is retained for legacy reason, new devices should use the bus | |
815 | * interface (PCI) for low level management. | |
816 | * | |
817 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
818 | * Called when a user wants to change the Maximum Transfer Unit | |
819 | * of a device. If not defined, any request to change MTU will | |
820 | * will return an error. | |
821 | * | |
00829823 | 822 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
823 | * Callback uses when the transmitter has not made any progress |
824 | * for dev->watchdog ticks. | |
825 | * | |
3cfde79c | 826 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 827 | * struct rtnl_link_stats64 *storage); |
d308e38f | 828 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 829 | * Called when a user wants to get the network device usage |
be1f3c2c | 830 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
831 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
832 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 833 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
834 | * (which should normally be dev->stats) and return a pointer to |
835 | * it. The structure may be changed asynchronously only if each | |
836 | * field is written atomically. | |
837 | * 3. Update dev->stats asynchronously and atomically, and define | |
838 | * neither operation. | |
d314774c | 839 | * |
80d5c368 PM |
840 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
841 | * If device support VLAN filtering this function is called when a | |
842 | * VLAN id is registered. | |
d314774c | 843 | * |
8e586137 | 844 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
80d5c368 PM |
845 | * If device support VLAN filtering this function is called when a |
846 | * VLAN id is unregistered. | |
d314774c SH |
847 | * |
848 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
849 | * |
850 | * SR-IOV management functions. | |
851 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
852 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
853 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
5f8444a3 | 854 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
855 | * int (*ndo_get_vf_config)(struct net_device *dev, |
856 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 857 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
858 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
859 | * struct nlattr *port[]); | |
860 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
861 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
862 | * Called to setup 'tc' number of traffic classes in the net device. This | |
863 | * is always called from the stack with the rtnl lock held and netif tx | |
864 | * queues stopped. This allows the netdevice to perform queue management | |
865 | * safely. | |
c445477d | 866 | * |
e9bce845 YZ |
867 | * Fiber Channel over Ethernet (FCoE) offload functions. |
868 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
869 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
870 | * so the underlying device can perform whatever needed configuration or | |
871 | * initialization to support acceleration of FCoE traffic. | |
872 | * | |
873 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
874 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
875 | * so the underlying device can perform whatever needed clean-ups to | |
876 | * stop supporting acceleration of FCoE traffic. | |
877 | * | |
878 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
879 | * struct scatterlist *sgl, unsigned int sgc); | |
880 | * Called when the FCoE Initiator wants to initialize an I/O that | |
881 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
882 | * perform necessary setup and returns 1 to indicate the device is set up | |
883 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
884 | * | |
885 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
886 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
887 | * indicated by the FC exchange id 'xid', so the underlying device can | |
888 | * clean up and reuse resources for later DDP requests. | |
889 | * | |
890 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
891 | * struct scatterlist *sgl, unsigned int sgc); | |
892 | * Called when the FCoE Target wants to initialize an I/O that | |
893 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
894 | * perform necessary setup and returns 1 to indicate the device is set up | |
895 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
896 | * | |
68bad94e NP |
897 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
898 | * struct netdev_fcoe_hbainfo *hbainfo); | |
899 | * Called when the FCoE Protocol stack wants information on the underlying | |
900 | * device. This information is utilized by the FCoE protocol stack to | |
901 | * register attributes with Fiber Channel management service as per the | |
902 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
903 | * | |
e9bce845 YZ |
904 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
905 | * Called when the underlying device wants to override default World Wide | |
906 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
907 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
908 | * protocol stack to use. | |
909 | * | |
c445477d BH |
910 | * RFS acceleration. |
911 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
912 | * u16 rxq_index, u32 flow_id); | |
913 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
914 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
915 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 916 | * |
8b98a70c | 917 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
918 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
919 | * Called to make another netdev an underling. | |
920 | * | |
921 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
922 | * Called to release previously enslaved netdev. | |
5455c699 MM |
923 | * |
924 | * Feature/offload setting functions. | |
c8f44aff MM |
925 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
926 | * netdev_features_t features); | |
5455c699 MM |
927 | * Adjusts the requested feature flags according to device-specific |
928 | * constraints, and returns the resulting flags. Must not modify | |
929 | * the device state. | |
930 | * | |
c8f44aff | 931 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
932 | * Called to update device configuration to new features. Passed |
933 | * feature set might be less than what was returned by ndo_fix_features()). | |
934 | * Must return >0 or -errno if it changed dev->features itself. | |
935 | * | |
edc7d573 | 936 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
937 | * struct net_device *dev, | |
6b6e2725 | 938 | * const unsigned char *addr, u16 flags) |
77162022 | 939 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
940 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
941 | * struct net_device *dev, | |
6b6e2725 | 942 | * const unsigned char *addr) |
77162022 JF |
943 | * Deletes the FDB entry from dev coresponding to addr. |
944 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
945 | * struct net_device *dev, int idx) | |
946 | * Used to add FDB entries to dump requests. Implementers should add | |
947 | * entries to skb and update idx with the number of entries. | |
e5a55a89 JF |
948 | * |
949 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) | |
950 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, | |
24f11a5c | 951 | * struct net_device *dev, u32 filter_mask) |
4bf84c35 JP |
952 | * |
953 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
954 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
955 | * which do not represent real hardware may define this to allow their | |
956 | * userspace components to manage their virtual carrier state. Devices | |
957 | * that determine carrier state from physical hardware properties (eg | |
958 | * network cables) or protocol-dependent mechanisms (eg | |
959 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
960 | * |
961 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
962 | * struct netdev_phys_port_id *ppid); | |
963 | * Called to get ID of physical port of this device. If driver does | |
964 | * not implement this, it is assumed that the hw is not able to have | |
965 | * multiple net devices on single physical port. | |
53cf5275 JG |
966 | * |
967 | * void (*ndo_add_vxlan_port)(struct net_device *dev, | |
35e42379 | 968 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
969 | * Called by vxlan to notiy a driver about the UDP port and socket |
970 | * address family that vxlan is listnening to. It is called only when | |
971 | * a new port starts listening. The operation is protected by the | |
972 | * vxlan_net->sock_lock. | |
973 | * | |
974 | * void (*ndo_del_vxlan_port)(struct net_device *dev, | |
35e42379 | 975 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
976 | * Called by vxlan to notify the driver about a UDP port and socket |
977 | * address family that vxlan is not listening to anymore. The operation | |
978 | * is protected by the vxlan_net->sock_lock. | |
a6cc0cfa JF |
979 | * |
980 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
981 | * struct net_device *dev) | |
982 | * Called by upper layer devices to accelerate switching or other | |
983 | * station functionality into hardware. 'pdev is the lowerdev | |
984 | * to use for the offload and 'dev' is the net device that will | |
985 | * back the offload. Returns a pointer to the private structure | |
986 | * the upper layer will maintain. | |
987 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
988 | * Called by upper layer device to delete the station created | |
989 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
990 | * the station and priv is the structure returned by the add | |
991 | * operation. | |
992 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, | |
993 | * struct net_device *dev, | |
994 | * void *priv); | |
995 | * Callback to use for xmit over the accelerated station. This | |
996 | * is used in place of ndo_start_xmit on accelerated net | |
997 | * devices. | |
d314774c SH |
998 | */ |
999 | struct net_device_ops { | |
1000 | int (*ndo_init)(struct net_device *dev); | |
1001 | void (*ndo_uninit)(struct net_device *dev); | |
1002 | int (*ndo_open)(struct net_device *dev); | |
1003 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 1004 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
1005 | struct net_device *dev); |
1006 | u16 (*ndo_select_queue)(struct net_device *dev, | |
f663dd9a | 1007 | struct sk_buff *skb, |
99932d4f DB |
1008 | void *accel_priv, |
1009 | select_queue_fallback_t fallback); | |
d314774c SH |
1010 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1011 | int flags); | |
d314774c | 1012 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1013 | int (*ndo_set_mac_address)(struct net_device *dev, |
1014 | void *addr); | |
d314774c | 1015 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1016 | int (*ndo_do_ioctl)(struct net_device *dev, |
1017 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1018 | int (*ndo_set_config)(struct net_device *dev, |
1019 | struct ifmap *map); | |
00829823 SH |
1020 | int (*ndo_change_mtu)(struct net_device *dev, |
1021 | int new_mtu); | |
1022 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1023 | struct neigh_parms *); | |
d314774c SH |
1024 | void (*ndo_tx_timeout) (struct net_device *dev); |
1025 | ||
28172739 ED |
1026 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
1027 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
1028 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1029 | ||
8e586137 | 1030 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1031 | __be16 proto, u16 vid); |
8e586137 | 1032 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1033 | __be16 proto, u16 vid); |
d314774c | 1034 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1035 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1036 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1037 | struct netpoll_info *info); |
0e34e931 | 1038 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 | 1039 | #endif |
e0d1095a | 1040 | #ifdef CONFIG_NET_RX_BUSY_POLL |
8b80cda5 | 1041 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 1042 | #endif |
95c26df8 WM |
1043 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1044 | int queue, u8 *mac); | |
1045 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
1046 | int queue, u16 vlan, u8 qos); | |
1047 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
1048 | int vf, int rate); | |
5f8444a3 GR |
1049 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1050 | int vf, bool setting); | |
95c26df8 WM |
1051 | int (*ndo_get_vf_config)(struct net_device *dev, |
1052 | int vf, | |
1053 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1054 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1055 | int vf, int link_state); | |
57b61080 SF |
1056 | int (*ndo_set_vf_port)(struct net_device *dev, |
1057 | int vf, | |
1058 | struct nlattr *port[]); | |
1059 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1060 | int vf, struct sk_buff *skb); | |
4f57c087 | 1061 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
d11ead75 | 1062 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1063 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1064 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1065 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1066 | u16 xid, | |
1067 | struct scatterlist *sgl, | |
1068 | unsigned int sgc); | |
1069 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1070 | u16 xid); | |
6247e086 YZ |
1071 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1072 | u16 xid, | |
1073 | struct scatterlist *sgl, | |
1074 | unsigned int sgc); | |
68bad94e NP |
1075 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1076 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1077 | #endif |
1078 | ||
d11ead75 | 1079 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1080 | #define NETDEV_FCOE_WWNN 0 |
1081 | #define NETDEV_FCOE_WWPN 1 | |
1082 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1083 | u64 *wwn, int type); | |
4d288d57 | 1084 | #endif |
3c9c36bc | 1085 | |
c445477d BH |
1086 | #ifdef CONFIG_RFS_ACCEL |
1087 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1088 | const struct sk_buff *skb, | |
1089 | u16 rxq_index, | |
1090 | u32 flow_id); | |
1091 | #endif | |
fbaec0ea JP |
1092 | int (*ndo_add_slave)(struct net_device *dev, |
1093 | struct net_device *slave_dev); | |
1094 | int (*ndo_del_slave)(struct net_device *dev, | |
1095 | struct net_device *slave_dev); | |
c8f44aff MM |
1096 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1097 | netdev_features_t features); | |
5455c699 | 1098 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1099 | netdev_features_t features); |
da6a8fa0 | 1100 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1101 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1102 | |
1103 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1104 | struct nlattr *tb[], |
77162022 | 1105 | struct net_device *dev, |
6b6e2725 | 1106 | const unsigned char *addr, |
77162022 JF |
1107 | u16 flags); |
1108 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1109 | struct nlattr *tb[], |
77162022 | 1110 | struct net_device *dev, |
6b6e2725 | 1111 | const unsigned char *addr); |
77162022 JF |
1112 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1113 | struct netlink_callback *cb, | |
1114 | struct net_device *dev, | |
1115 | int idx); | |
e5a55a89 JF |
1116 | |
1117 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
1118 | struct nlmsghdr *nlh); | |
1119 | int (*ndo_bridge_getlink)(struct sk_buff *skb, | |
1120 | u32 pid, u32 seq, | |
6cbdceeb VY |
1121 | struct net_device *dev, |
1122 | u32 filter_mask); | |
407af329 VY |
1123 | int (*ndo_bridge_dellink)(struct net_device *dev, |
1124 | struct nlmsghdr *nlh); | |
4bf84c35 JP |
1125 | int (*ndo_change_carrier)(struct net_device *dev, |
1126 | bool new_carrier); | |
66b52b0d JP |
1127 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
1128 | struct netdev_phys_port_id *ppid); | |
53cf5275 JG |
1129 | void (*ndo_add_vxlan_port)(struct net_device *dev, |
1130 | sa_family_t sa_family, | |
35e42379 | 1131 | __be16 port); |
53cf5275 JG |
1132 | void (*ndo_del_vxlan_port)(struct net_device *dev, |
1133 | sa_family_t sa_family, | |
35e42379 | 1134 | __be16 port); |
a6cc0cfa JF |
1135 | |
1136 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
1137 | struct net_device *dev); | |
1138 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1139 | void *priv); | |
1140 | ||
1141 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, | |
1142 | struct net_device *dev, | |
1143 | void *priv); | |
d314774c SH |
1144 | }; |
1145 | ||
7aa98047 LR |
1146 | /** |
1147 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1148 | * | |
1149 | * These are the &struct net_device, they are only set internally | |
1150 | * by drivers and used in the kernel. These flags are invisible to | |
1151 | * userspace, this means that the order of these flags can change | |
1152 | * during any kernel release. | |
1153 | * | |
1154 | * You should have a pretty good reason to be extending these flags. | |
1155 | * | |
1156 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1157 | * @IFF_EBRIDGE: Ethernet bridging device | |
1158 | * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active | |
1159 | * @IFF_MASTER_8023AD: bonding master, 802.3ad | |
1160 | * @IFF_MASTER_ALB: bonding master, balance-alb | |
1161 | * @IFF_BONDING: bonding master or slave | |
1162 | * @IFF_SLAVE_NEEDARP: need ARPs for validation | |
1163 | * @IFF_ISATAP: ISATAP interface (RFC4214) | |
1164 | * @IFF_MASTER_ARPMON: bonding master, ARP mon in use | |
1165 | * @IFF_WAN_HDLC: WAN HDLC device | |
1166 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1167 | * release skb->dst | |
1168 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1169 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1170 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1171 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1172 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1173 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1174 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1175 | * @IFF_TEAM_PORT: device used as team port | |
1176 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1177 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1178 | * change when it's running | |
1179 | * @IFF_MACVLAN: Macvlan device | |
1180 | */ | |
1181 | enum netdev_priv_flags { | |
1182 | IFF_802_1Q_VLAN = 1<<0, | |
1183 | IFF_EBRIDGE = 1<<1, | |
1184 | IFF_SLAVE_INACTIVE = 1<<2, | |
1185 | IFF_MASTER_8023AD = 1<<3, | |
1186 | IFF_MASTER_ALB = 1<<4, | |
1187 | IFF_BONDING = 1<<5, | |
1188 | IFF_SLAVE_NEEDARP = 1<<6, | |
1189 | IFF_ISATAP = 1<<7, | |
1190 | IFF_MASTER_ARPMON = 1<<8, | |
1191 | IFF_WAN_HDLC = 1<<9, | |
1192 | IFF_XMIT_DST_RELEASE = 1<<10, | |
1193 | IFF_DONT_BRIDGE = 1<<11, | |
1194 | IFF_DISABLE_NETPOLL = 1<<12, | |
1195 | IFF_MACVLAN_PORT = 1<<13, | |
1196 | IFF_BRIDGE_PORT = 1<<14, | |
1197 | IFF_OVS_DATAPATH = 1<<15, | |
1198 | IFF_TX_SKB_SHARING = 1<<16, | |
1199 | IFF_UNICAST_FLT = 1<<17, | |
1200 | IFF_TEAM_PORT = 1<<18, | |
1201 | IFF_SUPP_NOFCS = 1<<19, | |
1202 | IFF_LIVE_ADDR_CHANGE = 1<<20, | |
1203 | IFF_MACVLAN = 1<<21, | |
1204 | }; | |
1205 | ||
1206 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1207 | #define IFF_EBRIDGE IFF_EBRIDGE | |
1208 | #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE | |
1209 | #define IFF_MASTER_8023AD IFF_MASTER_8023AD | |
1210 | #define IFF_MASTER_ALB IFF_MASTER_ALB | |
1211 | #define IFF_BONDING IFF_BONDING | |
1212 | #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP | |
1213 | #define IFF_ISATAP IFF_ISATAP | |
1214 | #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON | |
1215 | #define IFF_WAN_HDLC IFF_WAN_HDLC | |
1216 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1217 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1218 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1219 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1220 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1221 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1222 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1223 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1224 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1225 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1226 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1227 | #define IFF_MACVLAN IFF_MACVLAN | |
1228 | ||
1da177e4 LT |
1229 | /* |
1230 | * The DEVICE structure. | |
1231 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1232 | * data with strictly "high-level" data, and it has to know about | |
1233 | * almost every data structure used in the INET module. | |
1234 | * | |
1235 | * FIXME: cleanup struct net_device such that network protocol info | |
1236 | * moves out. | |
1237 | */ | |
1238 | ||
d94d9fee | 1239 | struct net_device { |
1da177e4 LT |
1240 | |
1241 | /* | |
1242 | * This is the first field of the "visible" part of this structure | |
1243 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
724df615 | 1244 | * of the interface. |
1da177e4 LT |
1245 | */ |
1246 | char name[IFNAMSIZ]; | |
ed77134b | 1247 | |
9136461a | 1248 | /* device name hash chain, please keep it close to name[] */ |
9356b8fc | 1249 | struct hlist_node name_hlist; |
9136461a | 1250 | |
0b815a1a SH |
1251 | /* snmp alias */ |
1252 | char *ifalias; | |
1da177e4 LT |
1253 | |
1254 | /* | |
1255 | * I/O specific fields | |
1256 | * FIXME: Merge these and struct ifmap into one | |
1257 | */ | |
1258 | unsigned long mem_end; /* shared mem end */ | |
1259 | unsigned long mem_start; /* shared mem start */ | |
1260 | unsigned long base_addr; /* device I/O address */ | |
df42153c | 1261 | int irq; /* device IRQ number */ |
1da177e4 LT |
1262 | |
1263 | /* | |
1264 | * Some hardware also needs these fields, but they are not | |
1265 | * part of the usual set specified in Space.c. | |
1266 | */ | |
1267 | ||
1da177e4 LT |
1268 | unsigned long state; |
1269 | ||
7562f876 | 1270 | struct list_head dev_list; |
bea3348e | 1271 | struct list_head napi_list; |
44a0873d | 1272 | struct list_head unreg_list; |
5cde2829 | 1273 | struct list_head close_list; |
2f268f12 VF |
1274 | |
1275 | /* directly linked devices, like slaves for bonding */ | |
1276 | struct { | |
1277 | struct list_head upper; | |
1278 | struct list_head lower; | |
1279 | } adj_list; | |
1280 | ||
1281 | /* all linked devices, *including* neighbours */ | |
1282 | struct { | |
1283 | struct list_head upper; | |
1284 | struct list_head lower; | |
1285 | } all_adj_list; | |
4c3d5e7b | 1286 | |
1da177e4 | 1287 | |
5455c699 | 1288 | /* currently active device features */ |
c8f44aff | 1289 | netdev_features_t features; |
5455c699 | 1290 | /* user-changeable features */ |
c8f44aff | 1291 | netdev_features_t hw_features; |
5455c699 | 1292 | /* user-requested features */ |
c8f44aff | 1293 | netdev_features_t wanted_features; |
1aac6267 | 1294 | /* mask of features inheritable by VLAN devices */ |
c8f44aff | 1295 | netdev_features_t vlan_features; |
6a674e9c JG |
1296 | /* mask of features inherited by encapsulating devices |
1297 | * This field indicates what encapsulation offloads | |
1298 | * the hardware is capable of doing, and drivers will | |
1299 | * need to set them appropriately. | |
1300 | */ | |
1301 | netdev_features_t hw_enc_features; | |
0d89d203 SH |
1302 | /* mask of fetures inheritable by MPLS */ |
1303 | netdev_features_t mpls_features; | |
04ed3e74 | 1304 | |
1da177e4 LT |
1305 | /* Interface index. Unique device identifier */ |
1306 | int ifindex; | |
1307 | int iflink; | |
1308 | ||
c45d286e | 1309 | struct net_device_stats stats; |
015f0688 ED |
1310 | |
1311 | /* dropped packets by core network, Do not use this in drivers */ | |
1312 | atomic_long_t rx_dropped; | |
1313 | atomic_long_t tx_dropped; | |
1da177e4 | 1314 | |
2d3b479d | 1315 | /* Stats to monitor carrier on<->off transitions */ |
1316 | atomic_t carrier_changes; | |
1317 | ||
b86e0280 | 1318 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
1319 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1320 | * See <net/iw_handler.h> for details. Jean II */ | |
1321 | const struct iw_handler_def * wireless_handlers; | |
1322 | /* Instance data managed by the core of Wireless Extensions. */ | |
1323 | struct iw_public_data * wireless_data; | |
b86e0280 | 1324 | #endif |
d314774c SH |
1325 | /* Management operations */ |
1326 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 1327 | const struct ethtool_ops *ethtool_ops; |
a6cc0cfa | 1328 | const struct forwarding_accel_ops *fwd_ops; |
1da177e4 | 1329 | |
3b04ddde SH |
1330 | /* Hardware header description */ |
1331 | const struct header_ops *header_ops; | |
1332 | ||
b00055aa | 1333 | unsigned int flags; /* interface flags (a la BSD) */ |
3bdc0eba BG |
1334 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
1335 | * See if.h for definitions. */ | |
1da177e4 | 1336 | unsigned short gflags; |
1da177e4 LT |
1337 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1338 | ||
b00055aa SR |
1339 | unsigned char operstate; /* RFC2863 operstate */ |
1340 | unsigned char link_mode; /* mapping policy to operstate */ | |
1341 | ||
bdc220da JP |
1342 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1343 | unsigned char dma; /* DMA channel */ | |
1344 | ||
cd7b5396 | 1345 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
1346 | unsigned short type; /* interface hardware type */ |
1347 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 1348 | |
f5184d26 JB |
1349 | /* extra head- and tailroom the hardware may need, but not in all cases |
1350 | * can this be guaranteed, especially tailroom. Some cases also use | |
1351 | * LL_MAX_HEADER instead to allocate the skb. | |
1352 | */ | |
1353 | unsigned short needed_headroom; | |
1354 | unsigned short needed_tailroom; | |
1355 | ||
1da177e4 | 1356 | /* Interface address info. */ |
a6f9a705 | 1357 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
c1f79426 | 1358 | unsigned char addr_assign_type; /* hw address assignment type */ |
1da177e4 | 1359 | unsigned char addr_len; /* hardware address length */ |
a0a9663d | 1360 | unsigned short neigh_priv_len; |
dffebd2c N |
1361 | unsigned short dev_id; /* Used to differentiate devices |
1362 | * that share the same link | |
1363 | * layer address | |
1364 | */ | |
3f85944f AV |
1365 | unsigned short dev_port; /* Used to differentiate |
1366 | * devices that share the same | |
1367 | * function | |
1368 | */ | |
ccffad25 | 1369 | spinlock_t addr_list_lock; |
22bedad3 JP |
1370 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1371 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
4c3d5e7b ED |
1372 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1373 | * hw addresses | |
1374 | */ | |
1375 | #ifdef CONFIG_SYSFS | |
1376 | struct kset *queues_kset; | |
1377 | #endif | |
1378 | ||
2d348d1f | 1379 | bool uc_promisc; |
9d45abe1 WC |
1380 | unsigned int promiscuity; |
1381 | unsigned int allmulti; | |
1da177e4 | 1382 | |
1da177e4 LT |
1383 | |
1384 | /* Protocol specific pointers */ | |
65ac6a5f | 1385 | |
d11ead75 | 1386 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
5b9ea6e0 | 1387 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
65ac6a5f | 1388 | #endif |
34a430d7 | 1389 | #if IS_ENABLED(CONFIG_NET_DSA) |
cf50dcc2 | 1390 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
37cb0620 YX |
1391 | #endif |
1392 | #if IS_ENABLED(CONFIG_TIPC) | |
1393 | struct tipc_bearer __rcu *tipc_ptr; /* TIPC specific data */ | |
91da11f8 | 1394 | #endif |
1da177e4 | 1395 | void *atalk_ptr; /* AppleTalk link */ |
95ae6b22 | 1396 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
fc766e4c | 1397 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
198caeca | 1398 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1da177e4 | 1399 | void *ax25_ptr; /* AX.25 specific data */ |
704232c2 JB |
1400 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1401 | assign before registering */ | |
1da177e4 | 1402 | |
9356b8fc | 1403 | /* |
cd13539b | 1404 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1405 | */ |
f8ff080d | 1406 | unsigned long last_rx; /* Time of last Rx */ |
4dc89133 | 1407 | |
9356b8fc | 1408 | /* Interface address info used in eth_type_trans() */ |
f001fde5 JP |
1409 | unsigned char *dev_addr; /* hw address, (before bcast |
1410 | because most packets are | |
1411 | unicast) */ | |
1412 | ||
0a9627f2 | 1413 | |
a953be53 | 1414 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1415 | struct netdev_rx_queue *_rx; |
1416 | ||
62fe0b40 | 1417 | /* Number of RX queues allocated at register_netdev() time */ |
0a9627f2 | 1418 | unsigned int num_rx_queues; |
62fe0b40 BH |
1419 | |
1420 | /* Number of RX queues currently active in device */ | |
1421 | unsigned int real_num_rx_queues; | |
c445477d | 1422 | |
df334545 | 1423 | #endif |
0a9627f2 | 1424 | |
61391cde | 1425 | rx_handler_func_t __rcu *rx_handler; |
1426 | void __rcu *rx_handler_data; | |
e8a0464c | 1427 | |
24824a09 | 1428 | struct netdev_queue __rcu *ingress_queue; |
4c3d5e7b ED |
1429 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
1430 | ||
cd13539b ED |
1431 | |
1432 | /* | |
1433 | * Cache lines mostly used on transmit path | |
1434 | */ | |
e8a0464c | 1435 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
fd2ea0a7 DM |
1436 | |
1437 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 1438 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
1439 | |
1440 | /* Number of TX queues currently active in device */ | |
1441 | unsigned int real_num_tx_queues; | |
1442 | ||
af356afa PM |
1443 | /* root qdisc from userspace point of view */ |
1444 | struct Qdisc *qdisc; | |
1445 | ||
1da177e4 | 1446 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 1447 | spinlock_t tx_global_lock; |
cd13539b | 1448 | |
bf264145 | 1449 | #ifdef CONFIG_XPS |
a4177869 | 1450 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1451 | #endif |
4c3d5e7b ED |
1452 | #ifdef CONFIG_RFS_ACCEL |
1453 | /* CPU reverse-mapping for RX completion interrupts, indexed | |
1454 | * by RX queue number. Assigned by driver. This must only be | |
1455 | * set if the ndo_rx_flow_steer operation is defined. */ | |
1456 | struct cpu_rmap *rx_cpu_rmap; | |
1457 | #endif | |
1d24eb48 | 1458 | |
9356b8fc | 1459 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1460 | |
1461 | /* | |
1462 | * trans_start here is expensive for high speed devices on SMP, | |
1463 | * please use netdev_queue->trans_start instead. | |
1464 | */ | |
9356b8fc ED |
1465 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1466 | ||
1467 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1468 | struct timer_list watchdog_timer; | |
1469 | ||
1da177e4 | 1470 | /* Number of references to this device */ |
29b4433d | 1471 | int __percpu *pcpu_refcnt; |
9356b8fc | 1472 | |
1da177e4 LT |
1473 | /* delayed register/unregister */ |
1474 | struct list_head todo_list; | |
1da177e4 LT |
1475 | /* device index hash chain */ |
1476 | struct hlist_node index_hlist; | |
1477 | ||
e014debe | 1478 | struct list_head link_watch_list; |
572a103d | 1479 | |
1da177e4 LT |
1480 | /* register/unregister state machine */ |
1481 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1482 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1483 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1484 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1485 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1486 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1487 | } reg_state:8; |
1488 | ||
1489 | bool dismantle; /* device is going do be freed */ | |
a2835763 PM |
1490 | |
1491 | enum { | |
1492 | RTNL_LINK_INITIALIZED, | |
1493 | RTNL_LINK_INITIALIZING, | |
1494 | } rtnl_link_state:16; | |
1da177e4 | 1495 | |
d314774c SH |
1496 | /* Called from unregister, can be used to call free_netdev */ |
1497 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1498 | |
1da177e4 | 1499 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1500 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1501 | #endif |
eae792b7 | 1502 | |
c346dca1 | 1503 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1504 | /* Network namespace this network device is inside */ |
1505 | struct net *nd_net; | |
c346dca1 | 1506 | #endif |
4a1c5371 | 1507 | |
4951704b | 1508 | /* mid-layer private */ |
a7855c78 ED |
1509 | union { |
1510 | void *ml_priv; | |
1511 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ | |
8f84985f | 1512 | struct pcpu_sw_netstats __percpu *tstats; |
6d81f41c | 1513 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
2681128f | 1514 | struct pcpu_vstats __percpu *vstats; /* veth stats */ |
a7855c78 | 1515 | }; |
eca9ebac | 1516 | /* GARP */ |
3cc77ec7 | 1517 | struct garp_port __rcu *garp_port; |
febf018d DW |
1518 | /* MRP */ |
1519 | struct mrp_port __rcu *mrp_port; | |
1da177e4 | 1520 | |
1da177e4 | 1521 | /* class/net/name entry */ |
43cb76d9 | 1522 | struct device dev; |
0c509a6c EB |
1523 | /* space for optional device, statistics, and wireless sysfs groups */ |
1524 | const struct attribute_group *sysfs_groups[4]; | |
a953be53 MD |
1525 | /* space for optional per-rx queue attributes */ |
1526 | const struct attribute_group *sysfs_rx_queue_group; | |
38f7b870 PM |
1527 | |
1528 | /* rtnetlink link ops */ | |
1529 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1530 | |
82cc1a7a PWJ |
1531 | /* for setting kernel sock attribute on TCP connection setup */ |
1532 | #define GSO_MAX_SIZE 65536 | |
1533 | unsigned int gso_max_size; | |
30b678d8 BH |
1534 | #define GSO_MAX_SEGS 65535 |
1535 | u16 gso_max_segs; | |
d314774c | 1536 | |
7a6b6f51 | 1537 | #ifdef CONFIG_DCB |
2f90b865 | 1538 | /* Data Center Bridging netlink ops */ |
32953543 | 1539 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1540 | #endif |
4f57c087 JF |
1541 | u8 num_tc; |
1542 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1543 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1544 | |
d11ead75 | 1545 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 YZ |
1546 | /* max exchange id for FCoE LRO by ddp */ |
1547 | unsigned int fcoe_ddp_xid; | |
5bc1421e | 1548 | #endif |
86f8515f | 1549 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1550 | struct netprio_map __rcu *priomap; |
4d288d57 | 1551 | #endif |
c1f19b51 RC |
1552 | /* phy device may attach itself for hardware timestamping */ |
1553 | struct phy_device *phydev; | |
cbda10fa | 1554 | |
23d3b8bf ED |
1555 | struct lock_class_key *qdisc_tx_busylock; |
1556 | ||
cbda10fa VD |
1557 | /* group the device belongs to */ |
1558 | int group; | |
9136461a ED |
1559 | |
1560 | struct pm_qos_request pm_qos_req; | |
1da177e4 | 1561 | }; |
43cb76d9 | 1562 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1563 | |
1564 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1565 | |
4f57c087 JF |
1566 | static inline |
1567 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1568 | { | |
1569 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1570 | } | |
1571 | ||
1572 | static inline | |
1573 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1574 | { | |
1575 | if (tc >= dev->num_tc) | |
1576 | return -EINVAL; | |
1577 | ||
1578 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | static inline | |
1583 | void netdev_reset_tc(struct net_device *dev) | |
1584 | { | |
1585 | dev->num_tc = 0; | |
1586 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1587 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1588 | } | |
1589 | ||
1590 | static inline | |
1591 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1592 | { | |
1593 | if (tc >= dev->num_tc) | |
1594 | return -EINVAL; | |
1595 | ||
1596 | dev->tc_to_txq[tc].count = count; | |
1597 | dev->tc_to_txq[tc].offset = offset; | |
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | static inline | |
1602 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1603 | { | |
1604 | if (num_tc > TC_MAX_QUEUE) | |
1605 | return -EINVAL; | |
1606 | ||
1607 | dev->num_tc = num_tc; | |
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static inline | |
1612 | int netdev_get_num_tc(struct net_device *dev) | |
1613 | { | |
1614 | return dev->num_tc; | |
1615 | } | |
1616 | ||
e8a0464c DM |
1617 | static inline |
1618 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1619 | unsigned int index) | |
1620 | { | |
1621 | return &dev->_tx[index]; | |
1622 | } | |
1623 | ||
1624 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1625 | void (*f)(struct net_device *, | |
1626 | struct netdev_queue *, | |
1627 | void *), | |
1628 | void *arg) | |
1629 | { | |
1630 | unsigned int i; | |
1631 | ||
1632 | for (i = 0; i < dev->num_tx_queues; i++) | |
1633 | f(dev, &dev->_tx[i], arg); | |
1634 | } | |
1635 | ||
f629d208 | 1636 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
1637 | struct sk_buff *skb, |
1638 | void *accel_priv); | |
8c4c49df | 1639 | |
c346dca1 YH |
1640 | /* |
1641 | * Net namespace inlines | |
1642 | */ | |
1643 | static inline | |
1644 | struct net *dev_net(const struct net_device *dev) | |
1645 | { | |
c2d9ba9b | 1646 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1647 | } |
1648 | ||
1649 | static inline | |
f5aa23fd | 1650 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1651 | { |
1652 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1653 | release_net(dev->nd_net); |
1654 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1655 | #endif |
1656 | } | |
1657 | ||
cf85d08f LB |
1658 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1659 | { | |
1660 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1661 | if (dev->dsa_ptr != NULL) | |
1662 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1663 | #endif | |
1664 | ||
1665 | return 0; | |
1666 | } | |
1667 | ||
396138f0 LB |
1668 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1669 | { | |
1670 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1671 | if (dev->dsa_ptr != NULL) | |
1672 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1673 | #endif | |
1674 | ||
1675 | return 0; | |
1676 | } | |
1677 | ||
bea3348e SH |
1678 | /** |
1679 | * netdev_priv - access network device private data | |
1680 | * @dev: network device | |
1681 | * | |
1682 | * Get network device private data | |
1683 | */ | |
6472ce60 | 1684 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1685 | { |
1ce8e7b5 | 1686 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1687 | } |
1688 | ||
1da177e4 LT |
1689 | /* Set the sysfs physical device reference for the network logical device |
1690 | * if set prior to registration will cause a symlink during initialization. | |
1691 | */ | |
43cb76d9 | 1692 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1693 | |
384912ed | 1694 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 1695 | * fine-grained identification of different network device types. For |
384912ed MH |
1696 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
1697 | */ | |
1698 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1699 | ||
82dc3c63 ED |
1700 | /* Default NAPI poll() weight |
1701 | * Device drivers are strongly advised to not use bigger value | |
1702 | */ | |
1703 | #define NAPI_POLL_WEIGHT 64 | |
1704 | ||
3b582cc1 SH |
1705 | /** |
1706 | * netif_napi_add - initialize a napi context | |
1707 | * @dev: network device | |
1708 | * @napi: napi context | |
1709 | * @poll: polling function | |
1710 | * @weight: default weight | |
1711 | * | |
1712 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1713 | * *any* of the other napi related functions. | |
1714 | */ | |
d565b0a1 HX |
1715 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1716 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1717 | |
d8156534 AD |
1718 | /** |
1719 | * netif_napi_del - remove a napi context | |
1720 | * @napi: napi context | |
1721 | * | |
1722 | * netif_napi_del() removes a napi context from the network device napi list | |
1723 | */ | |
d565b0a1 HX |
1724 | void netif_napi_del(struct napi_struct *napi); |
1725 | ||
1726 | struct napi_gro_cb { | |
78a478d0 HX |
1727 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1728 | void *frag0; | |
1729 | ||
7489594c HX |
1730 | /* Length of frag0. */ |
1731 | unsigned int frag0_len; | |
1732 | ||
86911732 HX |
1733 | /* This indicates where we are processing relative to skb->data. */ |
1734 | int data_offset; | |
1735 | ||
d565b0a1 | 1736 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
1737 | u16 flush; |
1738 | ||
1739 | /* Save the IP ID here and check when we get to the transport layer */ | |
1740 | u16 flush_id; | |
d565b0a1 HX |
1741 | |
1742 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
1743 | u16 count; |
1744 | ||
1745 | /* This is non-zero if the packet may be of the same flow. */ | |
1746 | u8 same_flow; | |
5d38a079 HX |
1747 | |
1748 | /* Free the skb? */ | |
2e71a6f8 | 1749 | u8 free; |
d7e8883c ED |
1750 | #define NAPI_GRO_FREE 1 |
1751 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2e71a6f8 ED |
1752 | |
1753 | /* jiffies when first packet was created/queued */ | |
1754 | unsigned long age; | |
86347245 ED |
1755 | |
1756 | /* Used in ipv6_gro_receive() */ | |
b582ef09 OG |
1757 | u16 proto; |
1758 | ||
1759 | /* Used in udp_gro_receive */ | |
1760 | u16 udp_mark; | |
c3c7c254 | 1761 | |
bf5a755f JC |
1762 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
1763 | __wsum csum; | |
1764 | ||
c3c7c254 ED |
1765 | /* used in skb_gro_receive() slow path */ |
1766 | struct sk_buff *last; | |
d565b0a1 HX |
1767 | }; |
1768 | ||
1769 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1770 | |
1da177e4 | 1771 | struct packet_type { |
f2ccd8fa DM |
1772 | __be16 type; /* This is really htons(ether_type). */ |
1773 | struct net_device *dev; /* NULL is wildcarded here */ | |
1774 | int (*func) (struct sk_buff *, | |
1775 | struct net_device *, | |
1776 | struct packet_type *, | |
1777 | struct net_device *); | |
c0de08d0 EL |
1778 | bool (*id_match)(struct packet_type *ptype, |
1779 | struct sock *sk); | |
1da177e4 LT |
1780 | void *af_packet_priv; |
1781 | struct list_head list; | |
1782 | }; | |
1783 | ||
f191a1d1 | 1784 | struct offload_callbacks { |
576a30eb | 1785 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1786 | netdev_features_t features); |
a430a43d | 1787 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1788 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1789 | struct sk_buff *skb); | |
299603e8 | 1790 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
1791 | }; |
1792 | ||
1793 | struct packet_offload { | |
1794 | __be16 type; /* This is really htons(ether_type). */ | |
1795 | struct offload_callbacks callbacks; | |
1796 | struct list_head list; | |
1da177e4 LT |
1797 | }; |
1798 | ||
b582ef09 OG |
1799 | struct udp_offload { |
1800 | __be16 port; | |
1801 | struct offload_callbacks callbacks; | |
1802 | }; | |
1803 | ||
8f84985f LR |
1804 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
1805 | struct pcpu_sw_netstats { | |
1806 | u64 rx_packets; | |
1807 | u64 rx_bytes; | |
1808 | u64 tx_packets; | |
1809 | u64 tx_bytes; | |
1810 | struct u64_stats_sync syncp; | |
1811 | }; | |
1812 | ||
1c213bd2 WC |
1813 | #define netdev_alloc_pcpu_stats(type) \ |
1814 | ({ \ | |
693350c2 | 1815 | typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \ |
1c213bd2 WC |
1816 | if (pcpu_stats) { \ |
1817 | int i; \ | |
1818 | for_each_possible_cpu(i) { \ | |
1819 | typeof(type) *stat; \ | |
1820 | stat = per_cpu_ptr(pcpu_stats, i); \ | |
1821 | u64_stats_init(&stat->syncp); \ | |
1822 | } \ | |
1823 | } \ | |
1824 | pcpu_stats; \ | |
1825 | }) | |
1826 | ||
1da177e4 LT |
1827 | #include <linux/notifier.h> |
1828 | ||
dcfe1421 AW |
1829 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1830 | * notification exclusion list in rtnetlink_event() when adding new | |
1831 | * types. | |
1832 | */ | |
1833 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
1834 | #define NETDEV_DOWN 0x0002 | |
1835 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
1836 | detected a hardware crash and restarted | |
1837 | - we can use this eg to kick tcp sessions | |
1838 | once done */ | |
1839 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
1840 | #define NETDEV_REGISTER 0x0005 | |
1841 | #define NETDEV_UNREGISTER 0x0006 | |
1d486bfb | 1842 | #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */ |
dcfe1421 AW |
1843 | #define NETDEV_CHANGEADDR 0x0008 |
1844 | #define NETDEV_GOING_DOWN 0x0009 | |
1845 | #define NETDEV_CHANGENAME 0x000A | |
1846 | #define NETDEV_FEAT_CHANGE 0x000B | |
1847 | #define NETDEV_BONDING_FAILOVER 0x000C | |
1848 | #define NETDEV_PRE_UP 0x000D | |
1849 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
1850 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
1851 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 1852 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
1853 | #define NETDEV_RELEASE 0x0012 |
1854 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
1855 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 1856 | #define NETDEV_CHANGEUPPER 0x0015 |
4aa5dee4 | 1857 | #define NETDEV_RESEND_IGMP 0x0016 |
1d486bfb | 1858 | #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */ |
dcfe1421 | 1859 | |
f629d208 JP |
1860 | int register_netdevice_notifier(struct notifier_block *nb); |
1861 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
1862 | |
1863 | struct netdev_notifier_info { | |
1864 | struct net_device *dev; | |
1865 | }; | |
1866 | ||
be9efd36 JP |
1867 | struct netdev_notifier_change_info { |
1868 | struct netdev_notifier_info info; /* must be first */ | |
1869 | unsigned int flags_changed; | |
1870 | }; | |
1871 | ||
75538c2b CW |
1872 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
1873 | struct net_device *dev) | |
1874 | { | |
1875 | info->dev = dev; | |
1876 | } | |
1877 | ||
351638e7 JP |
1878 | static inline struct net_device * |
1879 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
1880 | { | |
1881 | return info->dev; | |
1882 | } | |
1883 | ||
f629d208 | 1884 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
1885 | |
1886 | ||
1da177e4 LT |
1887 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1888 | ||
881d966b EB |
1889 | #define for_each_netdev(net, d) \ |
1890 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1891 | #define for_each_netdev_reverse(net, d) \ |
1892 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1893 | #define for_each_netdev_rcu(net, d) \ |
1894 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1895 | #define for_each_netdev_safe(net, d, n) \ |
1896 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1897 | #define for_each_netdev_continue(net, d) \ | |
1898 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1899 | #define for_each_netdev_continue_rcu(net, d) \ |
1900 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 1901 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
1902 | for_each_netdev_rcu(&init_net, slave) \ | |
1903 | if (netdev_master_upper_dev_get_rcu(slave) == bond) | |
881d966b | 1904 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1905 | |
a050c33f DL |
1906 | static inline struct net_device *next_net_device(struct net_device *dev) |
1907 | { | |
1908 | struct list_head *lh; | |
1909 | struct net *net; | |
1910 | ||
c346dca1 | 1911 | net = dev_net(dev); |
a050c33f DL |
1912 | lh = dev->dev_list.next; |
1913 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1914 | } | |
1915 | ||
ce81b76a ED |
1916 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1917 | { | |
1918 | struct list_head *lh; | |
1919 | struct net *net; | |
1920 | ||
1921 | net = dev_net(dev); | |
ccf43438 | 1922 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
1923 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1924 | } | |
1925 | ||
a050c33f DL |
1926 | static inline struct net_device *first_net_device(struct net *net) |
1927 | { | |
1928 | return list_empty(&net->dev_base_head) ? NULL : | |
1929 | net_device_entry(net->dev_base_head.next); | |
1930 | } | |
7562f876 | 1931 | |
ccf43438 ED |
1932 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1933 | { | |
1934 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
1935 | ||
1936 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1937 | } | |
1938 | ||
f629d208 JP |
1939 | int netdev_boot_setup_check(struct net_device *dev); |
1940 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
1941 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
1942 | const char *hwaddr); | |
1943 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1944 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1945 | void dev_add_pack(struct packet_type *pt); | |
1946 | void dev_remove_pack(struct packet_type *pt); | |
1947 | void __dev_remove_pack(struct packet_type *pt); | |
1948 | void dev_add_offload(struct packet_offload *po); | |
1949 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 JP |
1950 | |
1951 | struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, | |
1952 | unsigned short mask); | |
1953 | struct net_device *dev_get_by_name(struct net *net, const char *name); | |
1954 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
1955 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1956 | int dev_alloc_name(struct net_device *dev, const char *name); | |
1957 | int dev_open(struct net_device *dev); | |
1958 | int dev_close(struct net_device *dev); | |
1959 | void dev_disable_lro(struct net_device *dev); | |
1960 | int dev_loopback_xmit(struct sk_buff *newskb); | |
1961 | int dev_queue_xmit(struct sk_buff *skb); | |
f663dd9a | 1962 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
1963 | int register_netdevice(struct net_device *dev); |
1964 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
1965 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
1966 | static inline void unregister_netdevice(struct net_device *dev) |
1967 | { | |
1968 | unregister_netdevice_queue(dev, NULL); | |
1969 | } | |
1970 | ||
f629d208 JP |
1971 | int netdev_refcnt_read(const struct net_device *dev); |
1972 | void free_netdev(struct net_device *dev); | |
74d332c1 | 1973 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
1974 | void synchronize_net(void); |
1975 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 1976 | |
f629d208 JP |
1977 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1978 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1979 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
1980 | int netdev_get_name(struct net *net, char *name, int ifindex); | |
1981 | int dev_restart(struct net_device *dev); | |
f629d208 | 1982 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
1983 | |
1984 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1985 | { | |
1986 | return NAPI_GRO_CB(skb)->data_offset; | |
1987 | } | |
1988 | ||
1989 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1990 | { | |
1991 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1992 | } | |
1993 | ||
1994 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1995 | { | |
1996 | NAPI_GRO_CB(skb)->data_offset += len; | |
1997 | } | |
1998 | ||
a5b1cf28 HX |
1999 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2000 | unsigned int offset) | |
86911732 | 2001 | { |
a5b1cf28 HX |
2002 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2003 | } | |
78a478d0 | 2004 | |
a5b1cf28 HX |
2005 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2006 | { | |
2007 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2008 | } | |
78a478d0 | 2009 | |
a5b1cf28 HX |
2010 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2011 | unsigned int offset) | |
2012 | { | |
17dd759c HX |
2013 | if (!pskb_may_pull(skb, hlen)) |
2014 | return NULL; | |
2015 | ||
a5b1cf28 HX |
2016 | NAPI_GRO_CB(skb)->frag0 = NULL; |
2017 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 2018 | return skb->data + offset; |
86911732 | 2019 | } |
1da177e4 | 2020 | |
36e7b1b8 HX |
2021 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2022 | { | |
78d3fd0b HX |
2023 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2024 | skb_network_offset(skb); | |
36e7b1b8 HX |
2025 | } |
2026 | ||
bf5a755f JC |
2027 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2028 | const void *start, unsigned int len) | |
2029 | { | |
2030 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
2031 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, | |
2032 | csum_partial(start, len, 0)); | |
2033 | } | |
2034 | ||
0c4e8581 SH |
2035 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2036 | unsigned short type, | |
3b04ddde | 2037 | const void *daddr, const void *saddr, |
95c96174 | 2038 | unsigned int len) |
0c4e8581 | 2039 | { |
f1ecfd5d | 2040 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2041 | return 0; |
3b04ddde SH |
2042 | |
2043 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2044 | } |
2045 | ||
b95cce35 SH |
2046 | static inline int dev_parse_header(const struct sk_buff *skb, |
2047 | unsigned char *haddr) | |
2048 | { | |
2049 | const struct net_device *dev = skb->dev; | |
2050 | ||
1b83336b | 2051 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2052 | return 0; |
3b04ddde | 2053 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2054 | } |
2055 | ||
2205369a DM |
2056 | static inline int dev_rebuild_header(struct sk_buff *skb) |
2057 | { | |
2058 | const struct net_device *dev = skb->dev; | |
2059 | ||
2060 | if (!dev->header_ops || !dev->header_ops->rebuild) | |
2061 | return 0; | |
2062 | return dev->header_ops->rebuild(skb); | |
2063 | } | |
2064 | ||
1da177e4 | 2065 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
f629d208 | 2066 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2067 | static inline int unregister_gifconf(unsigned int family) |
2068 | { | |
2069 | return register_gifconf(family, NULL); | |
2070 | } | |
2071 | ||
99bbc707 | 2072 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2073 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2074 | struct sd_flow_limit { |
2075 | u64 count; | |
2076 | unsigned int num_buckets; | |
2077 | unsigned int history_head; | |
2078 | u16 history[FLOW_LIMIT_HISTORY]; | |
2079 | u8 buckets[]; | |
2080 | }; | |
2081 | ||
2082 | extern int netdev_flow_limit_table_len; | |
2083 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2084 | ||
1da177e4 | 2085 | /* |
88751275 | 2086 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 2087 | */ |
d94d9fee | 2088 | struct softnet_data { |
37437bb2 | 2089 | struct Qdisc *output_queue; |
a9cbd588 | 2090 | struct Qdisc **output_queue_tailp; |
1da177e4 | 2091 | struct list_head poll_list; |
1da177e4 | 2092 | struct sk_buff *completion_queue; |
6e7676c1 | 2093 | struct sk_buff_head process_queue; |
1da177e4 | 2094 | |
dee42870 | 2095 | /* stats */ |
cd7b5396 DM |
2096 | unsigned int processed; |
2097 | unsigned int time_squeeze; | |
2098 | unsigned int cpu_collision; | |
2099 | unsigned int received_rps; | |
dee42870 | 2100 | |
fd793d89 | 2101 | #ifdef CONFIG_RPS |
88751275 ED |
2102 | struct softnet_data *rps_ipi_list; |
2103 | ||
2104 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 2105 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
2106 | struct softnet_data *rps_ipi_next; |
2107 | unsigned int cpu; | |
fec5e652 | 2108 | unsigned int input_queue_head; |
76cc8b13 | 2109 | unsigned int input_queue_tail; |
1e94d72f | 2110 | #endif |
95c96174 | 2111 | unsigned int dropped; |
0a9627f2 | 2112 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2113 | struct napi_struct backlog; |
99bbc707 WB |
2114 | |
2115 | #ifdef CONFIG_NET_FLOW_LIMIT | |
5f121b9a | 2116 | struct sd_flow_limit __rcu *flow_limit; |
99bbc707 | 2117 | #endif |
1da177e4 LT |
2118 | }; |
2119 | ||
76cc8b13 | 2120 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2121 | { |
2122 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2123 | sd->input_queue_head++; |
2124 | #endif | |
2125 | } | |
2126 | ||
2127 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2128 | unsigned int *qtail) | |
2129 | { | |
2130 | #ifdef CONFIG_RPS | |
2131 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2132 | #endif |
2133 | } | |
2134 | ||
0a9627f2 | 2135 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2136 | |
f629d208 | 2137 | void __netif_schedule(struct Qdisc *q); |
1da177e4 | 2138 | |
86d804e1 | 2139 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 2140 | { |
73466498 | 2141 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
37437bb2 | 2142 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
2143 | } |
2144 | ||
fd2ea0a7 DM |
2145 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2146 | { | |
2147 | unsigned int i; | |
2148 | ||
2149 | for (i = 0; i < dev->num_tx_queues; i++) | |
2150 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2151 | } | |
2152 | ||
d29f749e DJ |
2153 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
2154 | { | |
73466498 | 2155 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2156 | } |
2157 | ||
bea3348e SH |
2158 | /** |
2159 | * netif_start_queue - allow transmit | |
2160 | * @dev: network device | |
2161 | * | |
2162 | * Allow upper layers to call the device hard_start_xmit routine. | |
2163 | */ | |
1da177e4 LT |
2164 | static inline void netif_start_queue(struct net_device *dev) |
2165 | { | |
e8a0464c | 2166 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2167 | } |
2168 | ||
fd2ea0a7 DM |
2169 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2170 | { | |
2171 | unsigned int i; | |
2172 | ||
2173 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2174 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2175 | netif_tx_start_queue(txq); | |
2176 | } | |
2177 | } | |
2178 | ||
79d16385 | 2179 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 | 2180 | { |
73466498 | 2181 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
37437bb2 | 2182 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
2183 | } |
2184 | ||
d29f749e DJ |
2185 | /** |
2186 | * netif_wake_queue - restart transmit | |
2187 | * @dev: network device | |
2188 | * | |
2189 | * Allow upper layers to call the device hard_start_xmit routine. | |
2190 | * Used for flow control when transmit resources are available. | |
2191 | */ | |
79d16385 DM |
2192 | static inline void netif_wake_queue(struct net_device *dev) |
2193 | { | |
e8a0464c | 2194 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2195 | } |
2196 | ||
fd2ea0a7 DM |
2197 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2198 | { | |
2199 | unsigned int i; | |
2200 | ||
2201 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2202 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2203 | netif_tx_wake_queue(txq); | |
2204 | } | |
2205 | } | |
2206 | ||
d29f749e DJ |
2207 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
2208 | { | |
18543a64 | 2209 | if (WARN_ON(!dev_queue)) { |
256ee435 | 2210 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
2211 | return; |
2212 | } | |
73466498 | 2213 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2214 | } |
2215 | ||
bea3348e SH |
2216 | /** |
2217 | * netif_stop_queue - stop transmitted packets | |
2218 | * @dev: network device | |
2219 | * | |
2220 | * Stop upper layers calling the device hard_start_xmit routine. | |
2221 | * Used for flow control when transmit resources are unavailable. | |
2222 | */ | |
1da177e4 LT |
2223 | static inline void netif_stop_queue(struct net_device *dev) |
2224 | { | |
e8a0464c | 2225 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2226 | } |
2227 | ||
fd2ea0a7 DM |
2228 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
2229 | { | |
2230 | unsigned int i; | |
2231 | ||
2232 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2233 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2234 | netif_tx_stop_queue(txq); | |
2235 | } | |
2236 | } | |
2237 | ||
4d29515f | 2238 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2239 | { |
73466498 | 2240 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2241 | } |
2242 | ||
bea3348e SH |
2243 | /** |
2244 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2245 | * @dev: network device | |
2246 | * | |
2247 | * Test if transmit queue on device is currently unable to send. | |
2248 | */ | |
4d29515f | 2249 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2250 | { |
e8a0464c | 2251 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2252 | } |
2253 | ||
4d29515f | 2254 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2255 | { |
73466498 TH |
2256 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2257 | } | |
2258 | ||
8e2f1a63 DB |
2259 | static inline bool |
2260 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
2261 | { |
2262 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2263 | } | |
2264 | ||
8e2f1a63 DB |
2265 | static inline bool |
2266 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
2267 | { | |
2268 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
2269 | } | |
2270 | ||
c5d67bd7 TH |
2271 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2272 | unsigned int bytes) | |
2273 | { | |
114cf580 TH |
2274 | #ifdef CONFIG_BQL |
2275 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2276 | |
2277 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2278 | return; | |
2279 | ||
2280 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2281 | ||
2282 | /* | |
2283 | * The XOFF flag must be set before checking the dql_avail below, | |
2284 | * because in netdev_tx_completed_queue we update the dql_completed | |
2285 | * before checking the XOFF flag. | |
2286 | */ | |
2287 | smp_mb(); | |
2288 | ||
2289 | /* check again in case another CPU has just made room avail */ | |
2290 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2291 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2292 | #endif |
c5d67bd7 TH |
2293 | } |
2294 | ||
0042d0c8 FF |
2295 | /** |
2296 | * netdev_sent_queue - report the number of bytes queued to hardware | |
2297 | * @dev: network device | |
2298 | * @bytes: number of bytes queued to the hardware device queue | |
2299 | * | |
2300 | * Report the number of bytes queued for sending/completion to the network | |
2301 | * device hardware queue. @bytes should be a good approximation and should | |
2302 | * exactly match netdev_completed_queue() @bytes | |
2303 | */ | |
c5d67bd7 TH |
2304 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2305 | { | |
2306 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2307 | } | |
2308 | ||
2309 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2310 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2311 | { |
114cf580 | 2312 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2313 | if (unlikely(!bytes)) |
2314 | return; | |
2315 | ||
2316 | dql_completed(&dev_queue->dql, bytes); | |
2317 | ||
2318 | /* | |
2319 | * Without the memory barrier there is a small possiblity that | |
2320 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2321 | * be stopped forever | |
2322 | */ | |
2323 | smp_mb(); | |
2324 | ||
2325 | if (dql_avail(&dev_queue->dql) < 0) | |
2326 | return; | |
2327 | ||
2328 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2329 | netif_schedule_queue(dev_queue); | |
114cf580 | 2330 | #endif |
c5d67bd7 TH |
2331 | } |
2332 | ||
0042d0c8 FF |
2333 | /** |
2334 | * netdev_completed_queue - report bytes and packets completed by device | |
2335 | * @dev: network device | |
2336 | * @pkts: actual number of packets sent over the medium | |
2337 | * @bytes: actual number of bytes sent over the medium | |
2338 | * | |
2339 | * Report the number of bytes and packets transmitted by the network device | |
2340 | * hardware queue over the physical medium, @bytes must exactly match the | |
2341 | * @bytes amount passed to netdev_sent_queue() | |
2342 | */ | |
c5d67bd7 | 2343 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 2344 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2345 | { |
2346 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2347 | } | |
2348 | ||
2349 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
2350 | { | |
114cf580 | 2351 | #ifdef CONFIG_BQL |
5c490354 | 2352 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
2353 | dql_reset(&q->dql); |
2354 | #endif | |
c5d67bd7 TH |
2355 | } |
2356 | ||
0042d0c8 FF |
2357 | /** |
2358 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
2359 | * @dev_queue: network device | |
2360 | * | |
2361 | * Reset the bytes and packet count of a network device and clear the | |
2362 | * software flow control OFF bit for this network device | |
2363 | */ | |
c5d67bd7 TH |
2364 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
2365 | { | |
2366 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
2367 | } |
2368 | ||
b9507bda DB |
2369 | /** |
2370 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
2371 | * @dev: network device | |
2372 | * @queue_index: given tx queue index | |
2373 | * | |
2374 | * Returns 0 if given tx queue index >= number of device tx queues, | |
2375 | * otherwise returns the originally passed tx queue index. | |
2376 | */ | |
2377 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
2378 | { | |
2379 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
2380 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
2381 | dev->name, queue_index, | |
2382 | dev->real_num_tx_queues); | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | return queue_index; | |
2387 | } | |
2388 | ||
bea3348e SH |
2389 | /** |
2390 | * netif_running - test if up | |
2391 | * @dev: network device | |
2392 | * | |
2393 | * Test if the device has been brought up. | |
2394 | */ | |
4d29515f | 2395 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
2396 | { |
2397 | return test_bit(__LINK_STATE_START, &dev->state); | |
2398 | } | |
2399 | ||
f25f4e44 PWJ |
2400 | /* |
2401 | * Routines to manage the subqueues on a device. We only need start | |
2402 | * stop, and a check if it's stopped. All other device management is | |
2403 | * done at the overall netdevice level. | |
2404 | * Also test the device if we're multiqueue. | |
2405 | */ | |
bea3348e SH |
2406 | |
2407 | /** | |
2408 | * netif_start_subqueue - allow sending packets on subqueue | |
2409 | * @dev: network device | |
2410 | * @queue_index: sub queue index | |
2411 | * | |
2412 | * Start individual transmit queue of a device with multiple transmit queues. | |
2413 | */ | |
f25f4e44 PWJ |
2414 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2415 | { | |
fd2ea0a7 | 2416 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2417 | |
2418 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
2419 | } |
2420 | ||
bea3348e SH |
2421 | /** |
2422 | * netif_stop_subqueue - stop sending packets on subqueue | |
2423 | * @dev: network device | |
2424 | * @queue_index: sub queue index | |
2425 | * | |
2426 | * Stop individual transmit queue of a device with multiple transmit queues. | |
2427 | */ | |
f25f4e44 PWJ |
2428 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2429 | { | |
fd2ea0a7 | 2430 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 2431 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
2432 | } |
2433 | ||
bea3348e SH |
2434 | /** |
2435 | * netif_subqueue_stopped - test status of subqueue | |
2436 | * @dev: network device | |
2437 | * @queue_index: sub queue index | |
2438 | * | |
2439 | * Check individual transmit queue of a device with multiple transmit queues. | |
2440 | */ | |
4d29515f DM |
2441 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2442 | u16 queue_index) | |
f25f4e44 | 2443 | { |
fd2ea0a7 | 2444 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2445 | |
2446 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
2447 | } |
2448 | ||
4d29515f DM |
2449 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2450 | struct sk_buff *skb) | |
668f895a PE |
2451 | { |
2452 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
2453 | } | |
bea3348e SH |
2454 | |
2455 | /** | |
2456 | * netif_wake_subqueue - allow sending packets on subqueue | |
2457 | * @dev: network device | |
2458 | * @queue_index: sub queue index | |
2459 | * | |
2460 | * Resume individual transmit queue of a device with multiple transmit queues. | |
2461 | */ | |
f25f4e44 PWJ |
2462 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
2463 | { | |
fd2ea0a7 | 2464 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
73466498 | 2465 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
37437bb2 | 2466 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
2467 | } |
2468 | ||
537c00de | 2469 | #ifdef CONFIG_XPS |
53af53ae | 2470 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 2471 | u16 index); |
537c00de AD |
2472 | #else |
2473 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 2474 | const struct cpumask *mask, |
537c00de AD |
2475 | u16 index) |
2476 | { | |
2477 | return 0; | |
2478 | } | |
2479 | #endif | |
2480 | ||
a3d22a68 VZ |
2481 | /* |
2482 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
2483 | * as a distribution range limit for the returned value. | |
2484 | */ | |
2485 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
2486 | const struct sk_buff *skb) | |
2487 | { | |
2488 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
2489 | } | |
2490 | ||
bea3348e SH |
2491 | /** |
2492 | * netif_is_multiqueue - test if device has multiple transmit queues | |
2493 | * @dev: network device | |
2494 | * | |
2495 | * Check if device has multiple transmit queues | |
bea3348e | 2496 | */ |
4d29515f | 2497 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 2498 | { |
a02cec21 | 2499 | return dev->num_tx_queues > 1; |
f25f4e44 | 2500 | } |
1da177e4 | 2501 | |
f629d208 | 2502 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 2503 | |
a953be53 | 2504 | #ifdef CONFIG_SYSFS |
f629d208 | 2505 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
2506 | #else |
2507 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
2508 | unsigned int rxq) | |
2509 | { | |
2510 | return 0; | |
2511 | } | |
2512 | #endif | |
2513 | ||
3171d026 BH |
2514 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
2515 | const struct net_device *from_dev) | |
2516 | { | |
ee6ae1a1 JP |
2517 | int err; |
2518 | ||
2519 | err = netif_set_real_num_tx_queues(to_dev, | |
2520 | from_dev->real_num_tx_queues); | |
2521 | if (err) | |
2522 | return err; | |
a953be53 | 2523 | #ifdef CONFIG_SYSFS |
3171d026 BH |
2524 | return netif_set_real_num_rx_queues(to_dev, |
2525 | from_dev->real_num_rx_queues); | |
2526 | #else | |
2527 | return 0; | |
2528 | #endif | |
2529 | } | |
2530 | ||
a953be53 MD |
2531 | #ifdef CONFIG_SYSFS |
2532 | static inline unsigned int get_netdev_rx_queue_index( | |
2533 | struct netdev_rx_queue *queue) | |
2534 | { | |
2535 | struct net_device *dev = queue->dev; | |
2536 | int index = queue - dev->_rx; | |
2537 | ||
2538 | BUG_ON(index >= dev->num_rx_queues); | |
2539 | return index; | |
2540 | } | |
2541 | #endif | |
2542 | ||
16917b87 | 2543 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 2544 | int netif_get_num_default_rss_queues(void); |
16917b87 | 2545 | |
e6247027 ED |
2546 | enum skb_free_reason { |
2547 | SKB_REASON_CONSUMED, | |
2548 | SKB_REASON_DROPPED, | |
2549 | }; | |
2550 | ||
2551 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
2552 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 2553 | |
e6247027 ED |
2554 | /* |
2555 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
2556 | * interrupt context or with hardware interrupts being disabled. | |
2557 | * (in_irq() || irqs_disabled()) | |
2558 | * | |
2559 | * We provide four helpers that can be used in following contexts : | |
2560 | * | |
2561 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
2562 | * replacing kfree_skb(skb) | |
2563 | * | |
2564 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
2565 | * Typically used in place of consume_skb(skb) in TX completion path | |
2566 | * | |
2567 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
2568 | * replacing kfree_skb(skb) | |
2569 | * | |
2570 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
2571 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 2572 | */ |
e6247027 ED |
2573 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
2574 | { | |
2575 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
2576 | } | |
2577 | ||
2578 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
2579 | { | |
2580 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
2581 | } | |
2582 | ||
2583 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
2584 | { | |
2585 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
2586 | } | |
2587 | ||
2588 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
2589 | { | |
2590 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
2591 | } | |
1da177e4 | 2592 | |
f629d208 JP |
2593 | int netif_rx(struct sk_buff *skb); |
2594 | int netif_rx_ni(struct sk_buff *skb); | |
2595 | int netif_receive_skb(struct sk_buff *skb); | |
2596 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); | |
2597 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
2598 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
2599 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
2600 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
2601 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
2602 | |
2603 | static inline void napi_free_frags(struct napi_struct *napi) | |
2604 | { | |
2605 | kfree_skb(napi->skb); | |
2606 | napi->skb = NULL; | |
2607 | } | |
2608 | ||
f629d208 JP |
2609 | int netdev_rx_handler_register(struct net_device *dev, |
2610 | rx_handler_func_t *rx_handler, | |
2611 | void *rx_handler_data); | |
2612 | void netdev_rx_handler_unregister(struct net_device *dev); | |
2613 | ||
2614 | bool dev_valid_name(const char *name); | |
2615 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
2616 | int dev_ethtool(struct net *net, struct ifreq *); | |
2617 | unsigned int dev_get_flags(const struct net_device *); | |
2618 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
2619 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
2620 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
2621 | unsigned int gchanges); | |
f629d208 JP |
2622 | int dev_change_name(struct net_device *, const char *); |
2623 | int dev_set_alias(struct net_device *, const char *, size_t); | |
2624 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); | |
2625 | int dev_set_mtu(struct net_device *, int); | |
2626 | void dev_set_group(struct net_device *, int); | |
2627 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
2628 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
2629 | int dev_get_phys_port_id(struct net_device *dev, | |
2630 | struct netdev_phys_port_id *ppid); | |
2631 | int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, | |
f663dd9a | 2632 | struct netdev_queue *txq); |
a0265d28 | 2633 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 2634 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
1ee481fb | 2635 | bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb); |
1da177e4 | 2636 | |
20380731 | 2637 | extern int netdev_budget; |
1da177e4 LT |
2638 | |
2639 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 2640 | void netdev_run_todo(void); |
1da177e4 | 2641 | |
bea3348e SH |
2642 | /** |
2643 | * dev_put - release reference to device | |
2644 | * @dev: network device | |
2645 | * | |
9ef4429b | 2646 | * Release reference to device to allow it to be freed. |
bea3348e | 2647 | */ |
1da177e4 LT |
2648 | static inline void dev_put(struct net_device *dev) |
2649 | { | |
933393f5 | 2650 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2651 | } |
2652 | ||
bea3348e SH |
2653 | /** |
2654 | * dev_hold - get reference to device | |
2655 | * @dev: network device | |
2656 | * | |
9ef4429b | 2657 | * Hold reference to device to keep it from being freed. |
bea3348e | 2658 | */ |
15333061 SH |
2659 | static inline void dev_hold(struct net_device *dev) |
2660 | { | |
933393f5 | 2661 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2662 | } |
1da177e4 LT |
2663 | |
2664 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2665 | * and _off may be called from IRQ context, but it is caller | |
2666 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2667 | * |
2668 | * The name carrier is inappropriate, these functions should really be | |
2669 | * called netif_lowerlayer_*() because they represent the state of any | |
2670 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2671 | */ |
2672 | ||
f629d208 JP |
2673 | void linkwatch_init_dev(struct net_device *dev); |
2674 | void linkwatch_fire_event(struct net_device *dev); | |
2675 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 2676 | |
bea3348e SH |
2677 | /** |
2678 | * netif_carrier_ok - test if carrier present | |
2679 | * @dev: network device | |
2680 | * | |
2681 | * Check if carrier is present on device | |
2682 | */ | |
4d29515f | 2683 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
2684 | { |
2685 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
2686 | } | |
2687 | ||
f629d208 | 2688 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 2689 | |
f629d208 | 2690 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 2691 | |
f629d208 | 2692 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 2693 | |
f629d208 | 2694 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 2695 | |
bea3348e SH |
2696 | /** |
2697 | * netif_dormant_on - mark device as dormant. | |
2698 | * @dev: network device | |
2699 | * | |
2700 | * Mark device as dormant (as per RFC2863). | |
2701 | * | |
2702 | * The dormant state indicates that the relevant interface is not | |
2703 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
2704 | * in a "pending" state, waiting for some external event. For "on- | |
2705 | * demand" interfaces, this new state identifies the situation where the | |
2706 | * interface is waiting for events to place it in the up state. | |
2707 | * | |
2708 | */ | |
b00055aa SR |
2709 | static inline void netif_dormant_on(struct net_device *dev) |
2710 | { | |
2711 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2712 | linkwatch_fire_event(dev); | |
2713 | } | |
2714 | ||
bea3348e SH |
2715 | /** |
2716 | * netif_dormant_off - set device as not dormant. | |
2717 | * @dev: network device | |
2718 | * | |
2719 | * Device is not in dormant state. | |
2720 | */ | |
b00055aa SR |
2721 | static inline void netif_dormant_off(struct net_device *dev) |
2722 | { | |
2723 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2724 | linkwatch_fire_event(dev); | |
2725 | } | |
2726 | ||
bea3348e SH |
2727 | /** |
2728 | * netif_dormant - test if carrier present | |
2729 | * @dev: network device | |
2730 | * | |
2731 | * Check if carrier is present on device | |
2732 | */ | |
4d29515f | 2733 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
2734 | { |
2735 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
2736 | } | |
2737 | ||
2738 | ||
bea3348e SH |
2739 | /** |
2740 | * netif_oper_up - test if device is operational | |
2741 | * @dev: network device | |
2742 | * | |
2743 | * Check if carrier is operational | |
2744 | */ | |
4d29515f | 2745 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 2746 | { |
b00055aa SR |
2747 | return (dev->operstate == IF_OPER_UP || |
2748 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
2749 | } | |
2750 | ||
bea3348e SH |
2751 | /** |
2752 | * netif_device_present - is device available or removed | |
2753 | * @dev: network device | |
2754 | * | |
2755 | * Check if device has not been removed from system. | |
2756 | */ | |
4d29515f | 2757 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
2758 | { |
2759 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
2760 | } | |
2761 | ||
f629d208 | 2762 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 2763 | |
f629d208 | 2764 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
2765 | |
2766 | /* | |
2767 | * Network interface message level settings | |
2768 | */ | |
1da177e4 LT |
2769 | |
2770 | enum { | |
2771 | NETIF_MSG_DRV = 0x0001, | |
2772 | NETIF_MSG_PROBE = 0x0002, | |
2773 | NETIF_MSG_LINK = 0x0004, | |
2774 | NETIF_MSG_TIMER = 0x0008, | |
2775 | NETIF_MSG_IFDOWN = 0x0010, | |
2776 | NETIF_MSG_IFUP = 0x0020, | |
2777 | NETIF_MSG_RX_ERR = 0x0040, | |
2778 | NETIF_MSG_TX_ERR = 0x0080, | |
2779 | NETIF_MSG_TX_QUEUED = 0x0100, | |
2780 | NETIF_MSG_INTR = 0x0200, | |
2781 | NETIF_MSG_TX_DONE = 0x0400, | |
2782 | NETIF_MSG_RX_STATUS = 0x0800, | |
2783 | NETIF_MSG_PKTDATA = 0x1000, | |
2784 | NETIF_MSG_HW = 0x2000, | |
2785 | NETIF_MSG_WOL = 0x4000, | |
2786 | }; | |
2787 | ||
2788 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
2789 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
2790 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
2791 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
2792 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
2793 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
2794 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
2795 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
2796 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
2797 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
2798 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
2799 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
2800 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
2801 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
2802 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
2803 | ||
2804 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
2805 | { | |
2806 | /* use default */ | |
2807 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
2808 | return default_msg_enable_bits; | |
2809 | if (debug_value == 0) /* no output */ | |
2810 | return 0; | |
2811 | /* set low N bits */ | |
2812 | return (1 << debug_value) - 1; | |
2813 | } | |
2814 | ||
c773e847 | 2815 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 2816 | { |
c773e847 DM |
2817 | spin_lock(&txq->_xmit_lock); |
2818 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
2819 | } |
2820 | ||
fd2ea0a7 DM |
2821 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2822 | { | |
2823 | spin_lock_bh(&txq->_xmit_lock); | |
2824 | txq->xmit_lock_owner = smp_processor_id(); | |
2825 | } | |
2826 | ||
4d29515f | 2827 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 2828 | { |
4d29515f | 2829 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
2830 | if (likely(ok)) |
2831 | txq->xmit_lock_owner = smp_processor_id(); | |
2832 | return ok; | |
2833 | } | |
2834 | ||
2835 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
2836 | { | |
2837 | txq->xmit_lock_owner = -1; | |
2838 | spin_unlock(&txq->_xmit_lock); | |
2839 | } | |
2840 | ||
2841 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
2842 | { | |
2843 | txq->xmit_lock_owner = -1; | |
2844 | spin_unlock_bh(&txq->_xmit_lock); | |
2845 | } | |
2846 | ||
08baf561 ED |
2847 | static inline void txq_trans_update(struct netdev_queue *txq) |
2848 | { | |
2849 | if (txq->xmit_lock_owner != -1) | |
2850 | txq->trans_start = jiffies; | |
2851 | } | |
2852 | ||
d29f749e DJ |
2853 | /** |
2854 | * netif_tx_lock - grab network device transmit lock | |
2855 | * @dev: network device | |
d29f749e DJ |
2856 | * |
2857 | * Get network device transmit lock | |
2858 | */ | |
22dd7495 JHS |
2859 | static inline void netif_tx_lock(struct net_device *dev) |
2860 | { | |
e8a0464c | 2861 | unsigned int i; |
c3f26a26 | 2862 | int cpu; |
c773e847 | 2863 | |
c3f26a26 DM |
2864 | spin_lock(&dev->tx_global_lock); |
2865 | cpu = smp_processor_id(); | |
e8a0464c DM |
2866 | for (i = 0; i < dev->num_tx_queues; i++) { |
2867 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2868 | |
2869 | /* We are the only thread of execution doing a | |
2870 | * freeze, but we have to grab the _xmit_lock in | |
2871 | * order to synchronize with threads which are in | |
2872 | * the ->hard_start_xmit() handler and already | |
2873 | * checked the frozen bit. | |
2874 | */ | |
e8a0464c | 2875 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
2876 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2877 | __netif_tx_unlock(txq); | |
e8a0464c | 2878 | } |
932ff279 HX |
2879 | } |
2880 | ||
2881 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
2882 | { | |
e8a0464c DM |
2883 | local_bh_disable(); |
2884 | netif_tx_lock(dev); | |
932ff279 HX |
2885 | } |
2886 | ||
932ff279 HX |
2887 | static inline void netif_tx_unlock(struct net_device *dev) |
2888 | { | |
e8a0464c DM |
2889 | unsigned int i; |
2890 | ||
2891 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2892 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2893 | |
c3f26a26 DM |
2894 | /* No need to grab the _xmit_lock here. If the |
2895 | * queue is not stopped for another reason, we | |
2896 | * force a schedule. | |
2897 | */ | |
2898 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2899 | netif_schedule_queue(txq); |
c3f26a26 DM |
2900 | } |
2901 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2902 | } |
2903 | ||
2904 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2905 | { | |
e8a0464c DM |
2906 | netif_tx_unlock(dev); |
2907 | local_bh_enable(); | |
932ff279 HX |
2908 | } |
2909 | ||
c773e847 | 2910 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2911 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2912 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2913 | } \ |
2914 | } | |
2915 | ||
5efeac44 EB |
2916 | #define HARD_TX_TRYLOCK(dev, txq) \ |
2917 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
2918 | __netif_tx_trylock(txq) : \ | |
2919 | true ) | |
2920 | ||
c773e847 | 2921 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2922 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2923 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2924 | } \ |
2925 | } | |
2926 | ||
1da177e4 LT |
2927 | static inline void netif_tx_disable(struct net_device *dev) |
2928 | { | |
fd2ea0a7 | 2929 | unsigned int i; |
c3f26a26 | 2930 | int cpu; |
fd2ea0a7 | 2931 | |
c3f26a26 DM |
2932 | local_bh_disable(); |
2933 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2934 | for (i = 0; i < dev->num_tx_queues; i++) { |
2935 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2936 | |
2937 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2938 | netif_tx_stop_queue(txq); |
c3f26a26 | 2939 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2940 | } |
c3f26a26 | 2941 | local_bh_enable(); |
1da177e4 LT |
2942 | } |
2943 | ||
e308a5d8 DM |
2944 | static inline void netif_addr_lock(struct net_device *dev) |
2945 | { | |
2946 | spin_lock(&dev->addr_list_lock); | |
2947 | } | |
2948 | ||
2429f7ac JP |
2949 | static inline void netif_addr_lock_nested(struct net_device *dev) |
2950 | { | |
2951 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); | |
2952 | } | |
2953 | ||
e308a5d8 DM |
2954 | static inline void netif_addr_lock_bh(struct net_device *dev) |
2955 | { | |
2956 | spin_lock_bh(&dev->addr_list_lock); | |
2957 | } | |
2958 | ||
2959 | static inline void netif_addr_unlock(struct net_device *dev) | |
2960 | { | |
2961 | spin_unlock(&dev->addr_list_lock); | |
2962 | } | |
2963 | ||
2964 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2965 | { | |
2966 | spin_unlock_bh(&dev->addr_list_lock); | |
2967 | } | |
2968 | ||
f001fde5 | 2969 | /* |
31278e71 | 2970 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2971 | * rcu_read_lock held. |
2972 | */ | |
2973 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2974 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2975 | |
1da177e4 LT |
2976 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2977 | ||
f629d208 | 2978 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
2979 | |
2980 | /* Support for loadable net-drivers */ | |
f629d208 JP |
2981 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
2982 | void (*setup)(struct net_device *), | |
2983 | unsigned int txqs, unsigned int rxqs); | |
f25f4e44 | 2984 | #define alloc_netdev(sizeof_priv, name, setup) \ |
36909ea4 TH |
2985 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2986 | ||
2987 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ | |
2988 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) | |
2989 | ||
f629d208 JP |
2990 | int register_netdev(struct net_device *dev); |
2991 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2992 | |
22bedad3 | 2993 | /* General hardware address lists handling functions */ |
f629d208 JP |
2994 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
2995 | struct netdev_hw_addr_list *from_list, int addr_len); | |
2996 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2997 | struct netdev_hw_addr_list *from_list, int addr_len); | |
f629d208 | 2998 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 2999 | |
f001fde5 | 3000 | /* Functions used for device addresses handling */ |
f629d208 JP |
3001 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
3002 | unsigned char addr_type); | |
3003 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
3004 | unsigned char addr_type); | |
f629d208 JP |
3005 | void dev_addr_flush(struct net_device *dev); |
3006 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
3007 | |
3008 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
3009 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3010 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3011 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3012 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3013 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3014 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3015 | void dev_uc_flush(struct net_device *dev); | |
3016 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3017 | |
22bedad3 | 3018 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3019 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3020 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3021 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3022 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3023 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3024 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3025 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3026 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3027 | void dev_mc_flush(struct net_device *dev); | |
3028 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3029 | |
4417da66 | 3030 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3031 | void dev_set_rx_mode(struct net_device *dev); |
3032 | void __dev_set_rx_mode(struct net_device *dev); | |
3033 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3034 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3035 | void netdev_state_change(struct net_device *dev); | |
3036 | void netdev_notify_peers(struct net_device *dev); | |
3037 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3038 | /* Load a device via the kmod */ |
f629d208 JP |
3039 | void dev_load(struct net *net, const char *name); |
3040 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3041 | struct rtnl_link_stats64 *storage); | |
3042 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3043 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3044 | |
1da177e4 | 3045 | extern int netdev_max_backlog; |
3b098e2d | 3046 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3047 | extern int weight_p; |
0a14842f | 3048 | extern int bpf_jit_enable; |
9ff162a8 | 3049 | |
f629d208 | 3050 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
f629d208 JP |
3051 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3052 | struct list_head **iter); | |
8b5be856 VF |
3053 | |
3054 | /* iterate through upper list, must be called under RCU read lock */ | |
2f268f12 VF |
3055 | #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
3056 | for (iter = &(dev)->all_adj_list.upper, \ | |
3057 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3058 | updev; \ | |
3059 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) | |
8b5be856 | 3060 | |
f629d208 JP |
3061 | void *netdev_lower_get_next_private(struct net_device *dev, |
3062 | struct list_head **iter); | |
3063 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3064 | struct list_head **iter); | |
31088a11 VF |
3065 | |
3066 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3067 | for (iter = (dev)->adj_list.lower.next, \ | |
3068 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3069 | priv; \ | |
3070 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3071 | ||
3072 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3073 | for (iter = &(dev)->adj_list.lower, \ | |
3074 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3075 | priv; \ | |
3076 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3077 | ||
f629d208 | 3078 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3079 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3080 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3081 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
3082 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); | |
3083 | int netdev_master_upper_dev_link(struct net_device *dev, | |
9ff162a8 | 3084 | struct net_device *upper_dev); |
f629d208 JP |
3085 | int netdev_master_upper_dev_link_private(struct net_device *dev, |
3086 | struct net_device *upper_dev, | |
3087 | void *private); | |
3088 | void netdev_upper_dev_unlink(struct net_device *dev, | |
3089 | struct net_device *upper_dev); | |
5bb025fa | 3090 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
3091 | void *netdev_lower_dev_get_private(struct net_device *dev, |
3092 | struct net_device *lower_dev); | |
3093 | int skb_checksum_help(struct sk_buff *skb); | |
3094 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, | |
3095 | netdev_features_t features, bool tx_path); | |
3096 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
3097 | netdev_features_t features); | |
12b0004d CW |
3098 | |
3099 | static inline | |
3100 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
3101 | { | |
3102 | return __skb_gso_segment(skb, features, true); | |
3103 | } | |
53d6471c | 3104 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
3105 | |
3106 | static inline bool can_checksum_protocol(netdev_features_t features, | |
3107 | __be16 protocol) | |
3108 | { | |
3109 | return ((features & NETIF_F_GEN_CSUM) || | |
3110 | ((features & NETIF_F_V4_CSUM) && | |
3111 | protocol == htons(ETH_P_IP)) || | |
3112 | ((features & NETIF_F_V6_CSUM) && | |
3113 | protocol == htons(ETH_P_IPV6)) || | |
3114 | ((features & NETIF_F_FCOE_CRC) && | |
3115 | protocol == htons(ETH_P_FCOE))); | |
3116 | } | |
12b0004d | 3117 | |
fb286bb2 | 3118 | #ifdef CONFIG_BUG |
f629d208 | 3119 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
3120 | #else |
3121 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
3122 | { | |
3123 | } | |
3124 | #endif | |
1da177e4 | 3125 | /* rx skb timestamps */ |
f629d208 JP |
3126 | void net_enable_timestamp(void); |
3127 | void net_disable_timestamp(void); | |
1da177e4 | 3128 | |
20380731 | 3129 | #ifdef CONFIG_PROC_FS |
f629d208 | 3130 | int __init dev_proc_init(void); |
900ff8c6 CW |
3131 | #else |
3132 | #define dev_proc_init() 0 | |
20380731 ACM |
3133 | #endif |
3134 | ||
42a2d923 LT |
3135 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
3136 | const void *ns); | |
3137 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, | |
3138 | const void *ns); | |
58292cbe TH |
3139 | |
3140 | static inline int netdev_class_create_file(struct class_attribute *class_attr) | |
3141 | { | |
3142 | return netdev_class_create_file_ns(class_attr, NULL); | |
3143 | } | |
3144 | ||
3145 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) | |
3146 | { | |
3147 | netdev_class_remove_file_ns(class_attr, NULL); | |
3148 | } | |
b8a9787e | 3149 | |
04600794 JB |
3150 | extern struct kobj_ns_type_operations net_ns_type_operations; |
3151 | ||
f629d208 | 3152 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 3153 | |
f629d208 | 3154 | void linkwatch_run_queue(void); |
20380731 | 3155 | |
c8f44aff MM |
3156 | static inline netdev_features_t netdev_get_wanted_features( |
3157 | struct net_device *dev) | |
5455c699 MM |
3158 | { |
3159 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
3160 | } | |
c8f44aff MM |
3161 | netdev_features_t netdev_increment_features(netdev_features_t all, |
3162 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
3163 | |
3164 | /* Allow TSO being used on stacked device : | |
3165 | * Performing the GSO segmentation before last device | |
3166 | * is a performance improvement. | |
3167 | */ | |
3168 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
3169 | netdev_features_t mask) | |
3170 | { | |
3171 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
3172 | } | |
3173 | ||
6cb6a27c | 3174 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 3175 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 3176 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 3177 | |
fc4a7489 PM |
3178 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
3179 | struct net_device *dev); | |
3180 | ||
c1e756bf | 3181 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 3182 | |
4d29515f | 3183 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 3184 | { |
c8f44aff | 3185 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
3186 | |
3187 | /* check flags correspondence */ | |
3188 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
3189 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
3190 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
3191 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
3192 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
3193 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
3194 | ||
d6b4991a | 3195 | return (features & feature) == feature; |
576a30eb HX |
3196 | } |
3197 | ||
4d29515f | 3198 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 3199 | { |
278b2513 | 3200 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 3201 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
3202 | } |
3203 | ||
4d29515f DM |
3204 | static inline bool netif_needs_gso(struct sk_buff *skb, |
3205 | netdev_features_t features) | |
7967168c | 3206 | { |
fc741216 | 3207 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
3208 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
3209 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
3210 | } |
3211 | ||
82cc1a7a PWJ |
3212 | static inline void netif_set_gso_max_size(struct net_device *dev, |
3213 | unsigned int size) | |
3214 | { | |
3215 | dev->gso_max_size = size; | |
3216 | } | |
3217 | ||
7a7ffbab WCC |
3218 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
3219 | int pulled_hlen, u16 mac_offset, | |
3220 | int mac_len) | |
3221 | { | |
3222 | skb->protocol = protocol; | |
3223 | skb->encapsulation = 1; | |
3224 | skb_push(skb, pulled_hlen); | |
3225 | skb_reset_transport_header(skb); | |
3226 | skb->mac_header = mac_offset; | |
3227 | skb->network_header = skb->mac_header + mac_len; | |
3228 | skb->mac_len = mac_len; | |
3229 | } | |
3230 | ||
a6cc0cfa JF |
3231 | static inline bool netif_is_macvlan(struct net_device *dev) |
3232 | { | |
3233 | return dev->priv_flags & IFF_MACVLAN; | |
3234 | } | |
3235 | ||
8a7fbfab | 3236 | static inline bool netif_is_bond_master(struct net_device *dev) |
3237 | { | |
3238 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
3239 | } | |
3240 | ||
4d29515f | 3241 | static inline bool netif_is_bond_slave(struct net_device *dev) |
1765a575 JP |
3242 | { |
3243 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
3244 | } | |
3245 | ||
3bdc0eba BG |
3246 | static inline bool netif_supports_nofcs(struct net_device *dev) |
3247 | { | |
3248 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
3249 | } | |
3250 | ||
505d4f73 | 3251 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 3252 | |
571ba423 JP |
3253 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
3254 | ||
3255 | /* netdev_printk helpers, similar to dev_printk */ | |
3256 | ||
3257 | static inline const char *netdev_name(const struct net_device *dev) | |
3258 | { | |
3259 | if (dev->reg_state != NETREG_REGISTERED) | |
3260 | return "(unregistered net_device)"; | |
3261 | return dev->name; | |
3262 | } | |
3263 | ||
f629d208 | 3264 | __printf(3, 4) |
b9075fa9 JP |
3265 | int netdev_printk(const char *level, const struct net_device *dev, |
3266 | const char *format, ...); | |
f629d208 | 3267 | __printf(2, 3) |
b9075fa9 | 3268 | int netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 3269 | __printf(2, 3) |
b9075fa9 | 3270 | int netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 3271 | __printf(2, 3) |
b9075fa9 | 3272 | int netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 3273 | __printf(2, 3) |
b9075fa9 | 3274 | int netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 3275 | __printf(2, 3) |
b9075fa9 | 3276 | int netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 3277 | __printf(2, 3) |
b9075fa9 | 3278 | int netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 3279 | __printf(2, 3) |
b9075fa9 | 3280 | int netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 3281 | |
8909c9ad VK |
3282 | #define MODULE_ALIAS_NETDEV(device) \ |
3283 | MODULE_ALIAS("netdev-" device) | |
3284 | ||
b558c96f | 3285 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
3286 | #define netdev_dbg(__dev, format, args...) \ |
3287 | do { \ | |
ffa10cb4 | 3288 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 3289 | } while (0) |
b558c96f JC |
3290 | #elif defined(DEBUG) |
3291 | #define netdev_dbg(__dev, format, args...) \ | |
3292 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
3293 | #else |
3294 | #define netdev_dbg(__dev, format, args...) \ | |
3295 | ({ \ | |
3296 | if (0) \ | |
3297 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
3298 | 0; \ | |
3299 | }) | |
3300 | #endif | |
3301 | ||
3302 | #if defined(VERBOSE_DEBUG) | |
3303 | #define netdev_vdbg netdev_dbg | |
3304 | #else | |
3305 | ||
3306 | #define netdev_vdbg(dev, format, args...) \ | |
3307 | ({ \ | |
3308 | if (0) \ | |
3309 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
3310 | 0; \ | |
3311 | }) | |
3312 | #endif | |
3313 | ||
3314 | /* | |
3315 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
3316 | * of using a WARN/WARN_ON to get the message out, including the | |
3317 | * file/line information and a backtrace. | |
3318 | */ | |
3319 | #define netdev_WARN(dev, format, args...) \ | |
7cc7c5e5 | 3320 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args) |
571ba423 | 3321 | |
b3d95c5c JP |
3322 | /* netif printk helpers, similar to netdev_printk */ |
3323 | ||
3324 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
3325 | do { \ | |
3326 | if (netif_msg_##type(priv)) \ | |
3327 | netdev_printk(level, (dev), fmt, ##args); \ | |
3328 | } while (0) | |
3329 | ||
f45f4321 JP |
3330 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
3331 | do { \ | |
3332 | if (netif_msg_##type(priv)) \ | |
3333 | netdev_##level(dev, fmt, ##args); \ | |
3334 | } while (0) | |
3335 | ||
b3d95c5c | 3336 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 3337 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 3338 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 3339 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 3340 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 3341 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 3342 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 3343 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 3344 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 3345 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 3346 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 3347 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 3348 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 3349 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 3350 | |
0053ea9c | 3351 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
3352 | #define netif_dbg(priv, type, netdev, format, args...) \ |
3353 | do { \ | |
3354 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 3355 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 3356 | } while (0) |
0053ea9c JP |
3357 | #elif defined(DEBUG) |
3358 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3359 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
3360 | #else |
3361 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3362 | ({ \ | |
3363 | if (0) \ | |
3364 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
3365 | 0; \ | |
3366 | }) | |
3367 | #endif | |
3368 | ||
3369 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 3370 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
3371 | #else |
3372 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
3373 | ({ \ | |
3374 | if (0) \ | |
a4ed89cb | 3375 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
3376 | 0; \ |
3377 | }) | |
3378 | #endif | |
571ba423 | 3379 | |
900ff8c6 CW |
3380 | /* |
3381 | * The list of packet types we will receive (as opposed to discard) | |
3382 | * and the routines to invoke. | |
3383 | * | |
3384 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
3385 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
3386 | * | |
3387 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
3388 | * sure which should go first, but I bet it won't make much | |
3389 | * difference if we are running VLANs. The good news is that | |
3390 | * this protocol won't be in the list unless compiled in, so | |
3391 | * the average user (w/out VLANs) will not be adversely affected. | |
3392 | * --BLG | |
3393 | * | |
3394 | * 0800 IP | |
3395 | * 8100 802.1Q VLAN | |
3396 | * 0001 802.3 | |
3397 | * 0002 AX.25 | |
3398 | * 0004 802.2 | |
3399 | * 8035 RARP | |
3400 | * 0005 SNAP | |
3401 | * 0805 X.25 | |
3402 | * 0806 ARP | |
3403 | * 8137 IPX | |
3404 | * 0009 Localtalk | |
3405 | * 86DD IPv6 | |
3406 | */ | |
3407 | #define PTYPE_HASH_SIZE (16) | |
3408 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
3409 | ||
385a154c | 3410 | #endif /* _LINUX_NETDEVICE_H */ |