Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Definitions for the Interfaces handler. | |
7 | * | |
8 | * Version: @(#)dev.h 1.0.10 08/12/93 | |
9 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> | |
13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> | |
113aa838 | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
15 | * Bjorn Ekwall. <bj0rn@blox.se> |
16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | * | |
23 | * Moved to /usr/include/linux for NET3 | |
24 | */ | |
25 | #ifndef _LINUX_NETDEVICE_H | |
26 | #define _LINUX_NETDEVICE_H | |
27 | ||
e8db0be1 | 28 | #include <linux/pm_qos.h> |
d7fe0f24 | 29 | #include <linux/timer.h> |
187f1882 | 30 | #include <linux/bug.h> |
bea3348e | 31 | #include <linux/delay.h> |
60063497 | 32 | #include <linux/atomic.h> |
1da177e4 LT |
33 | #include <asm/cache.h> |
34 | #include <asm/byteorder.h> | |
35 | ||
1da177e4 | 36 | #include <linux/percpu.h> |
4d5b78c0 | 37 | #include <linux/rculist.h> |
db217334 | 38 | #include <linux/dmaengine.h> |
bea3348e | 39 | #include <linux/workqueue.h> |
114cf580 | 40 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 41 | |
b1b67dd4 | 42 | #include <linux/ethtool.h> |
a050c33f | 43 | #include <net/net_namespace.h> |
cf85d08f | 44 | #include <net/dsa.h> |
7a6b6f51 | 45 | #ifdef CONFIG_DCB |
2f90b865 AD |
46 | #include <net/dcbnl.h> |
47 | #endif | |
5bc1421e | 48 | #include <net/netprio_cgroup.h> |
a050c33f | 49 | |
a59e2ecb | 50 | #include <linux/netdev_features.h> |
77162022 | 51 | #include <linux/neighbour.h> |
607ca46e | 52 | #include <uapi/linux/netdevice.h> |
a59e2ecb | 53 | |
115c1d6e | 54 | struct netpoll_info; |
313162d0 | 55 | struct device; |
c1f19b51 | 56 | struct phy_device; |
704232c2 JB |
57 | /* 802.11 specific */ |
58 | struct wireless_dev; | |
1da177e4 LT |
59 | /* source back-compat hooks */ |
60 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
61 | ( (netdev)->ethtool_ops = (ops) ) | |
62 | ||
f629d208 JP |
63 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
64 | const struct ethtool_ops *ops); | |
d07d7507 | 65 | |
9a1654ba JP |
66 | /* Backlog congestion levels */ |
67 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
68 | #define NET_RX_DROP 1 /* packet dropped */ | |
69 | ||
572a9d7b PM |
70 | /* |
71 | * Transmit return codes: transmit return codes originate from three different | |
72 | * namespaces: | |
73 | * | |
74 | * - qdisc return codes | |
75 | * - driver transmit return codes | |
76 | * - errno values | |
77 | * | |
78 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
79 | * function. Real network devices commonly used with qdiscs should only return | |
80 | * the driver transmit return codes though - when qdiscs are used, the actual | |
81 | * transmission happens asynchronously, so the value is not propagated to | |
82 | * higher layers. Virtual network devices transmit synchronously, in this case | |
83 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
84 | * others are propagated to higher layers. | |
85 | */ | |
86 | ||
87 | /* qdisc ->enqueue() return codes. */ | |
88 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
89 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
90 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
91 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
92 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 93 | |
b9df3cb8 GR |
94 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
95 | * indicates that the device will soon be dropping packets, or already drops | |
96 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 97 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
98 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
99 | ||
dc1f8bf6 | 100 | /* Driver transmit return codes */ |
9a1654ba | 101 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 102 | |
dc1f8bf6 | 103 | enum netdev_tx { |
572a9d7b | 104 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
105 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
106 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
107 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
108 | }; |
109 | typedef enum netdev_tx netdev_tx_t; | |
110 | ||
9a1654ba JP |
111 | /* |
112 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
113 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
114 | */ | |
115 | static inline bool dev_xmit_complete(int rc) | |
116 | { | |
117 | /* | |
118 | * Positive cases with an skb consumed by a driver: | |
119 | * - successful transmission (rc == NETDEV_TX_OK) | |
120 | * - error while transmitting (rc < 0) | |
121 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
122 | */ | |
123 | if (likely(rc < NET_XMIT_MASK)) | |
124 | return true; | |
125 | ||
126 | return false; | |
127 | } | |
128 | ||
1da177e4 LT |
129 | /* |
130 | * Compute the worst case header length according to the protocols | |
131 | * used. | |
132 | */ | |
fe2918b0 | 133 | |
d11ead75 | 134 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
8388e3da DM |
135 | # if defined(CONFIG_MAC80211_MESH) |
136 | # define LL_MAX_HEADER 128 | |
137 | # else | |
138 | # define LL_MAX_HEADER 96 | |
139 | # endif | |
1da177e4 | 140 | #else |
8388e3da | 141 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
142 | #endif |
143 | ||
d11ead75 BH |
144 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
145 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
146 | #define MAX_HEADER LL_MAX_HEADER |
147 | #else | |
148 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
149 | #endif | |
150 | ||
151 | /* | |
be1f3c2c BH |
152 | * Old network device statistics. Fields are native words |
153 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 154 | */ |
fe2918b0 | 155 | |
d94d9fee | 156 | struct net_device_stats { |
3cfde79c BH |
157 | unsigned long rx_packets; |
158 | unsigned long tx_packets; | |
159 | unsigned long rx_bytes; | |
160 | unsigned long tx_bytes; | |
161 | unsigned long rx_errors; | |
162 | unsigned long tx_errors; | |
163 | unsigned long rx_dropped; | |
164 | unsigned long tx_dropped; | |
165 | unsigned long multicast; | |
1da177e4 | 166 | unsigned long collisions; |
1da177e4 | 167 | unsigned long rx_length_errors; |
3cfde79c BH |
168 | unsigned long rx_over_errors; |
169 | unsigned long rx_crc_errors; | |
170 | unsigned long rx_frame_errors; | |
171 | unsigned long rx_fifo_errors; | |
172 | unsigned long rx_missed_errors; | |
1da177e4 LT |
173 | unsigned long tx_aborted_errors; |
174 | unsigned long tx_carrier_errors; | |
175 | unsigned long tx_fifo_errors; | |
176 | unsigned long tx_heartbeat_errors; | |
177 | unsigned long tx_window_errors; | |
1da177e4 LT |
178 | unsigned long rx_compressed; |
179 | unsigned long tx_compressed; | |
180 | }; | |
181 | ||
1da177e4 LT |
182 | |
183 | #include <linux/cache.h> | |
184 | #include <linux/skbuff.h> | |
185 | ||
adc9300e | 186 | #ifdef CONFIG_RPS |
c5905afb IM |
187 | #include <linux/static_key.h> |
188 | extern struct static_key rps_needed; | |
adc9300e ED |
189 | #endif |
190 | ||
1da177e4 LT |
191 | struct neighbour; |
192 | struct neigh_parms; | |
193 | struct sk_buff; | |
194 | ||
f001fde5 JP |
195 | struct netdev_hw_addr { |
196 | struct list_head list; | |
197 | unsigned char addr[MAX_ADDR_LEN]; | |
198 | unsigned char type; | |
ccffad25 JP |
199 | #define NETDEV_HW_ADDR_T_LAN 1 |
200 | #define NETDEV_HW_ADDR_T_SAN 2 | |
201 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
202 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 203 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 204 | bool global_use; |
4cd729b0 | 205 | int sync_cnt; |
8f8f103d | 206 | int refcount; |
4543fbef | 207 | int synced; |
f001fde5 JP |
208 | struct rcu_head rcu_head; |
209 | }; | |
210 | ||
31278e71 JP |
211 | struct netdev_hw_addr_list { |
212 | struct list_head list; | |
213 | int count; | |
214 | }; | |
215 | ||
22bedad3 JP |
216 | #define netdev_hw_addr_list_count(l) ((l)->count) |
217 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
218 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
219 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 220 | |
22bedad3 JP |
221 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
222 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
223 | #define netdev_for_each_uc_addr(ha, dev) \ | |
224 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 225 | |
22bedad3 JP |
226 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
227 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 228 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 229 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 230 | |
d94d9fee | 231 | struct hh_cache { |
f6b72b62 | 232 | u16 hh_len; |
5c25f686 | 233 | u16 __pad; |
3644f0ce | 234 | seqlock_t hh_lock; |
1da177e4 LT |
235 | |
236 | /* cached hardware header; allow for machine alignment needs. */ | |
237 | #define HH_DATA_MOD 16 | |
238 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 239 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
240 | #define HH_DATA_ALIGN(__len) \ |
241 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
242 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
243 | }; | |
244 | ||
245 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
246 | * Alternative is: | |
247 | * dev->hard_header_len ? (dev->hard_header_len + | |
248 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
249 | * | |
250 | * We could use other alignment values, but we must maintain the | |
251 | * relationship HH alignment <= LL alignment. | |
252 | */ | |
253 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 254 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 255 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 256 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 257 | |
3b04ddde SH |
258 | struct header_ops { |
259 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
260 | unsigned short type, const void *daddr, | |
95c96174 | 261 | const void *saddr, unsigned int len); |
3b04ddde SH |
262 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
263 | int (*rebuild)(struct sk_buff *skb); | |
e69dd336 | 264 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
265 | void (*cache_update)(struct hh_cache *hh, |
266 | const struct net_device *dev, | |
267 | const unsigned char *haddr); | |
268 | }; | |
269 | ||
1da177e4 LT |
270 | /* These flag bits are private to the generic network queueing |
271 | * layer, they may not be explicitly referenced by any other | |
272 | * code. | |
273 | */ | |
274 | ||
d94d9fee | 275 | enum netdev_state_t { |
1da177e4 LT |
276 | __LINK_STATE_START, |
277 | __LINK_STATE_PRESENT, | |
1da177e4 | 278 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
279 | __LINK_STATE_LINKWATCH_PENDING, |
280 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
281 | }; |
282 | ||
283 | ||
284 | /* | |
285 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 286 | * are then used in the device probing. |
1da177e4 LT |
287 | */ |
288 | struct netdev_boot_setup { | |
289 | char name[IFNAMSIZ]; | |
290 | struct ifmap map; | |
291 | }; | |
292 | #define NETDEV_BOOT_SETUP_MAX 8 | |
293 | ||
f629d208 | 294 | int __init netdev_boot_setup(char *str); |
1da177e4 | 295 | |
bea3348e SH |
296 | /* |
297 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
298 | */ | |
299 | struct napi_struct { | |
300 | /* The poll_list must only be managed by the entity which | |
301 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
302 | * whoever atomically sets that bit can add this napi_struct | |
303 | * to the per-cpu poll_list, and whoever clears that bit | |
304 | * can remove from the list right before clearing the bit. | |
305 | */ | |
306 | struct list_head poll_list; | |
307 | ||
308 | unsigned long state; | |
309 | int weight; | |
404f7c9e | 310 | unsigned int gro_count; |
bea3348e SH |
311 | int (*poll)(struct napi_struct *, int); |
312 | #ifdef CONFIG_NETPOLL | |
313 | spinlock_t poll_lock; | |
314 | int poll_owner; | |
bea3348e | 315 | #endif |
5d38a079 | 316 | struct net_device *dev; |
d565b0a1 | 317 | struct sk_buff *gro_list; |
5d38a079 | 318 | struct sk_buff *skb; |
404f7c9e | 319 | struct list_head dev_list; |
af12fa6e ET |
320 | struct hlist_node napi_hash_node; |
321 | unsigned int napi_id; | |
bea3348e SH |
322 | }; |
323 | ||
d94d9fee | 324 | enum { |
bea3348e | 325 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 326 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 327 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
af12fa6e | 328 | NAPI_STATE_HASHED, /* In NAPI hash */ |
bea3348e SH |
329 | }; |
330 | ||
5b252f0c | 331 | enum gro_result { |
d1c76af9 HX |
332 | GRO_MERGED, |
333 | GRO_MERGED_FREE, | |
334 | GRO_HELD, | |
335 | GRO_NORMAL, | |
336 | GRO_DROP, | |
337 | }; | |
5b252f0c | 338 | typedef enum gro_result gro_result_t; |
d1c76af9 | 339 | |
8a4eb573 JP |
340 | /* |
341 | * enum rx_handler_result - Possible return values for rx_handlers. | |
342 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
343 | * further. | |
344 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
345 | * case skb->dev was changed by rx_handler. | |
346 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
347 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
348 | * | |
349 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
350 | * special processing of the skb, prior to delivery to protocol handlers. | |
351 | * | |
352 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
353 | * to register a second rx_handler will return -EBUSY. | |
354 | * | |
355 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
356 | * To unregister a rx_handler on a net_device, use | |
357 | * netdev_rx_handler_unregister(). | |
358 | * | |
359 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
360 | * do with the skb. | |
361 | * | |
362 | * If the rx_handler consumed to skb in some way, it should return | |
363 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
364 | * the skb to be delivered in some other ways. | |
365 | * | |
366 | * If the rx_handler changed skb->dev, to divert the skb to another | |
367 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
368 | * new device will be called if it exists. | |
369 | * | |
370 | * If the rx_handler consider the skb should be ignored, it should return | |
371 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
d93cf068 | 372 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 JP |
373 | * |
374 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
375 | * delivered, it should return RX_HANDLER_PASS. | |
376 | * | |
377 | * A device without a registered rx_handler will behave as if rx_handler | |
378 | * returned RX_HANDLER_PASS. | |
379 | */ | |
380 | ||
381 | enum rx_handler_result { | |
382 | RX_HANDLER_CONSUMED, | |
383 | RX_HANDLER_ANOTHER, | |
384 | RX_HANDLER_EXACT, | |
385 | RX_HANDLER_PASS, | |
386 | }; | |
387 | typedef enum rx_handler_result rx_handler_result_t; | |
388 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 389 | |
f629d208 | 390 | void __napi_schedule(struct napi_struct *n); |
bea3348e | 391 | |
4d29515f | 392 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
393 | { |
394 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
395 | } | |
396 | ||
bea3348e SH |
397 | /** |
398 | * napi_schedule_prep - check if napi can be scheduled | |
399 | * @n: napi context | |
400 | * | |
401 | * Test if NAPI routine is already running, and if not mark | |
402 | * it as running. This is used as a condition variable | |
a0a46196 DM |
403 | * insure only one NAPI poll instance runs. We also make |
404 | * sure there is no pending NAPI disable. | |
bea3348e | 405 | */ |
4d29515f | 406 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 407 | { |
a0a46196 DM |
408 | return !napi_disable_pending(n) && |
409 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
410 | } |
411 | ||
412 | /** | |
413 | * napi_schedule - schedule NAPI poll | |
414 | * @n: napi context | |
415 | * | |
416 | * Schedule NAPI poll routine to be called if it is not already | |
417 | * running. | |
418 | */ | |
419 | static inline void napi_schedule(struct napi_struct *n) | |
420 | { | |
421 | if (napi_schedule_prep(n)) | |
422 | __napi_schedule(n); | |
423 | } | |
424 | ||
bfe13f54 | 425 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 426 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
427 | { |
428 | if (napi_schedule_prep(napi)) { | |
429 | __napi_schedule(napi); | |
4d29515f | 430 | return true; |
bfe13f54 | 431 | } |
4d29515f | 432 | return false; |
bfe13f54 RD |
433 | } |
434 | ||
bea3348e SH |
435 | /** |
436 | * napi_complete - NAPI processing complete | |
437 | * @n: napi context | |
438 | * | |
439 | * Mark NAPI processing as complete. | |
440 | */ | |
f629d208 JP |
441 | void __napi_complete(struct napi_struct *n); |
442 | void napi_complete(struct napi_struct *n); | |
bea3348e | 443 | |
af12fa6e ET |
444 | /** |
445 | * napi_by_id - lookup a NAPI by napi_id | |
446 | * @napi_id: hashed napi_id | |
447 | * | |
448 | * lookup @napi_id in napi_hash table | |
449 | * must be called under rcu_read_lock() | |
450 | */ | |
f629d208 | 451 | struct napi_struct *napi_by_id(unsigned int napi_id); |
af12fa6e ET |
452 | |
453 | /** | |
454 | * napi_hash_add - add a NAPI to global hashtable | |
455 | * @napi: napi context | |
456 | * | |
457 | * generate a new napi_id and store a @napi under it in napi_hash | |
458 | */ | |
f629d208 | 459 | void napi_hash_add(struct napi_struct *napi); |
af12fa6e ET |
460 | |
461 | /** | |
462 | * napi_hash_del - remove a NAPI from global table | |
463 | * @napi: napi context | |
464 | * | |
465 | * Warning: caller must observe rcu grace period | |
466 | * before freeing memory containing @napi | |
467 | */ | |
f629d208 | 468 | void napi_hash_del(struct napi_struct *napi); |
af12fa6e | 469 | |
bea3348e SH |
470 | /** |
471 | * napi_disable - prevent NAPI from scheduling | |
472 | * @n: napi context | |
473 | * | |
474 | * Stop NAPI from being scheduled on this context. | |
475 | * Waits till any outstanding processing completes. | |
476 | */ | |
477 | static inline void napi_disable(struct napi_struct *n) | |
478 | { | |
80c33ddd | 479 | might_sleep(); |
a0a46196 | 480 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 481 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 482 | msleep(1); |
a0a46196 | 483 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
484 | } |
485 | ||
486 | /** | |
487 | * napi_enable - enable NAPI scheduling | |
488 | * @n: napi context | |
489 | * | |
490 | * Resume NAPI from being scheduled on this context. | |
491 | * Must be paired with napi_disable. | |
492 | */ | |
493 | static inline void napi_enable(struct napi_struct *n) | |
494 | { | |
495 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
496 | smp_mb__before_clear_bit(); | |
497 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
498 | } | |
499 | ||
c264c3de SH |
500 | #ifdef CONFIG_SMP |
501 | /** | |
502 | * napi_synchronize - wait until NAPI is not running | |
503 | * @n: napi context | |
504 | * | |
505 | * Wait until NAPI is done being scheduled on this context. | |
506 | * Waits till any outstanding processing completes but | |
507 | * does not disable future activations. | |
508 | */ | |
509 | static inline void napi_synchronize(const struct napi_struct *n) | |
510 | { | |
511 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
512 | msleep(1); | |
513 | } | |
514 | #else | |
515 | # define napi_synchronize(n) barrier() | |
516 | #endif | |
517 | ||
d94d9fee | 518 | enum netdev_queue_state_t { |
73466498 TH |
519 | __QUEUE_STATE_DRV_XOFF, |
520 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 521 | __QUEUE_STATE_FROZEN, |
73466498 TH |
522 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
523 | (1 << __QUEUE_STATE_STACK_XOFF)) | |
524 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
525 | (1 << __QUEUE_STATE_FROZEN)) | |
79d16385 | 526 | }; |
73466498 TH |
527 | /* |
528 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
529 | * netif_tx_* functions below are used to manipulate this flag. The | |
530 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
531 | * queue independently. The netif_xmit_*stopped functions below are called | |
532 | * to check if the queue has been stopped by the driver or stack (either | |
533 | * of the XOFF bits are set in the state). Drivers should not need to call | |
534 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
535 | */ | |
79d16385 | 536 | |
bb949fbd | 537 | struct netdev_queue { |
6a321cb3 ED |
538 | /* |
539 | * read mostly part | |
540 | */ | |
bb949fbd | 541 | struct net_device *dev; |
b0e1e646 DM |
542 | struct Qdisc *qdisc; |
543 | struct Qdisc *qdisc_sleeping; | |
ccf5ff69 | 544 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
545 | struct kobject kobj; |
546 | #endif | |
f2cd2d3e ED |
547 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
548 | int numa_node; | |
549 | #endif | |
6a321cb3 ED |
550 | /* |
551 | * write mostly part | |
552 | */ | |
553 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
554 | int xmit_lock_owner; | |
9d21493b ED |
555 | /* |
556 | * please use this field instead of dev->trans_start | |
557 | */ | |
558 | unsigned long trans_start; | |
ccf5ff69 | 559 | |
560 | /* | |
561 | * Number of TX timeouts for this queue | |
562 | * (/sys/class/net/DEV/Q/trans_timeout) | |
563 | */ | |
564 | unsigned long trans_timeout; | |
114cf580 TH |
565 | |
566 | unsigned long state; | |
567 | ||
568 | #ifdef CONFIG_BQL | |
569 | struct dql dql; | |
570 | #endif | |
e8a0464c | 571 | } ____cacheline_aligned_in_smp; |
bb949fbd | 572 | |
f2cd2d3e ED |
573 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
574 | { | |
575 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
576 | return q->numa_node; | |
577 | #else | |
b236da69 | 578 | return NUMA_NO_NODE; |
f2cd2d3e ED |
579 | #endif |
580 | } | |
581 | ||
582 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
583 | { | |
584 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
585 | q->numa_node = node; | |
586 | #endif | |
587 | } | |
588 | ||
df334545 | 589 | #ifdef CONFIG_RPS |
0a9627f2 TH |
590 | /* |
591 | * This structure holds an RPS map which can be of variable length. The | |
592 | * map is an array of CPUs. | |
593 | */ | |
594 | struct rps_map { | |
595 | unsigned int len; | |
596 | struct rcu_head rcu; | |
597 | u16 cpus[0]; | |
598 | }; | |
60b778ce | 599 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 600 | |
fec5e652 | 601 | /* |
c445477d BH |
602 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
603 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
604 | * a hardware filter index. | |
fec5e652 TH |
605 | */ |
606 | struct rps_dev_flow { | |
607 | u16 cpu; | |
c445477d | 608 | u16 filter; |
fec5e652 TH |
609 | unsigned int last_qtail; |
610 | }; | |
c445477d | 611 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
612 | |
613 | /* | |
614 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
615 | */ | |
616 | struct rps_dev_flow_table { | |
617 | unsigned int mask; | |
618 | struct rcu_head rcu; | |
fec5e652 TH |
619 | struct rps_dev_flow flows[0]; |
620 | }; | |
621 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 622 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
623 | |
624 | /* | |
625 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
626 | * on which they were processed by the application (set in recvmsg). | |
627 | */ | |
628 | struct rps_sock_flow_table { | |
629 | unsigned int mask; | |
630 | u16 ents[0]; | |
631 | }; | |
632 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
60b778ce | 633 | ((_num) * sizeof(u16))) |
fec5e652 TH |
634 | |
635 | #define RPS_NO_CPU 0xffff | |
636 | ||
637 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
638 | u32 hash) | |
639 | { | |
640 | if (table && hash) { | |
641 | unsigned int cpu, index = hash & table->mask; | |
642 | ||
643 | /* We only give a hint, preemption can change cpu under us */ | |
644 | cpu = raw_smp_processor_id(); | |
645 | ||
646 | if (table->ents[index] != cpu) | |
647 | table->ents[index] = cpu; | |
648 | } | |
649 | } | |
650 | ||
651 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
652 | u32 hash) | |
653 | { | |
654 | if (table && hash) | |
655 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
656 | } | |
657 | ||
6e3f7faf | 658 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
fec5e652 | 659 | |
c445477d | 660 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
661 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
662 | u16 filter_id); | |
c445477d | 663 | #endif |
a953be53 | 664 | #endif /* CONFIG_RPS */ |
c445477d | 665 | |
0a9627f2 TH |
666 | /* This structure contains an instance of an RX queue. */ |
667 | struct netdev_rx_queue { | |
a953be53 | 668 | #ifdef CONFIG_RPS |
6e3f7faf ED |
669 | struct rps_map __rcu *rps_map; |
670 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 671 | #endif |
6e3f7faf | 672 | struct kobject kobj; |
fe822240 | 673 | struct net_device *dev; |
0a9627f2 | 674 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
675 | |
676 | /* | |
677 | * RX queue sysfs structures and functions. | |
678 | */ | |
679 | struct rx_queue_attribute { | |
680 | struct attribute attr; | |
681 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
682 | struct rx_queue_attribute *attr, char *buf); | |
683 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
684 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
685 | }; | |
d314774c | 686 | |
bf264145 TH |
687 | #ifdef CONFIG_XPS |
688 | /* | |
689 | * This structure holds an XPS map which can be of variable length. The | |
690 | * map is an array of queues. | |
691 | */ | |
692 | struct xps_map { | |
693 | unsigned int len; | |
694 | unsigned int alloc_len; | |
695 | struct rcu_head rcu; | |
696 | u16 queues[0]; | |
697 | }; | |
60b778ce | 698 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
bf264145 TH |
699 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
700 | / sizeof(u16)) | |
701 | ||
702 | /* | |
703 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
704 | */ | |
705 | struct xps_dev_maps { | |
706 | struct rcu_head rcu; | |
a4177869 | 707 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
708 | }; |
709 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
710 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
711 | #endif /* CONFIG_XPS */ | |
712 | ||
4f57c087 JF |
713 | #define TC_MAX_QUEUE 16 |
714 | #define TC_BITMASK 15 | |
715 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
716 | struct netdev_tc_txq { | |
717 | u16 count; | |
718 | u16 offset; | |
719 | }; | |
720 | ||
68bad94e NP |
721 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
722 | /* | |
723 | * This structure is to hold information about the device | |
724 | * configured to run FCoE protocol stack. | |
725 | */ | |
726 | struct netdev_fcoe_hbainfo { | |
727 | char manufacturer[64]; | |
728 | char serial_number[64]; | |
729 | char hardware_version[64]; | |
730 | char driver_version[64]; | |
731 | char optionrom_version[64]; | |
732 | char firmware_version[64]; | |
733 | char model[256]; | |
734 | char model_description[256]; | |
735 | }; | |
736 | #endif | |
737 | ||
66b52b0d JP |
738 | #define MAX_PHYS_PORT_ID_LEN 32 |
739 | ||
740 | /* This structure holds a unique identifier to identify the | |
741 | * physical port used by a netdevice. | |
742 | */ | |
743 | struct netdev_phys_port_id { | |
744 | unsigned char id[MAX_PHYS_PORT_ID_LEN]; | |
745 | unsigned char id_len; | |
746 | }; | |
747 | ||
99932d4f DB |
748 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
749 | struct sk_buff *skb); | |
750 | ||
d314774c SH |
751 | /* |
752 | * This structure defines the management hooks for network devices. | |
00829823 SH |
753 | * The following hooks can be defined; unless noted otherwise, they are |
754 | * optional and can be filled with a null pointer. | |
d314774c SH |
755 | * |
756 | * int (*ndo_init)(struct net_device *dev); | |
757 | * This function is called once when network device is registered. | |
758 | * The network device can use this to any late stage initializaton | |
759 | * or semantic validattion. It can fail with an error code which will | |
760 | * be propogated back to register_netdev | |
761 | * | |
762 | * void (*ndo_uninit)(struct net_device *dev); | |
763 | * This function is called when device is unregistered or when registration | |
764 | * fails. It is not called if init fails. | |
765 | * | |
766 | * int (*ndo_open)(struct net_device *dev); | |
767 | * This function is called when network device transistions to the up | |
768 | * state. | |
769 | * | |
770 | * int (*ndo_stop)(struct net_device *dev); | |
771 | * This function is called when network device transistions to the down | |
772 | * state. | |
773 | * | |
dc1f8bf6 SH |
774 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
775 | * struct net_device *dev); | |
00829823 | 776 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
777 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
778 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
779 | * Required can not be NULL. |
780 | * | |
f663dd9a | 781 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 782 | * void *accel_priv, select_queue_fallback_t fallback); |
00829823 SH |
783 | * Called to decide which queue to when device supports multiple |
784 | * transmit queues. | |
785 | * | |
d314774c SH |
786 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
787 | * This function is called to allow device receiver to make | |
788 | * changes to configuration when multicast or promiscious is enabled. | |
789 | * | |
790 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
791 | * This function is called device changes address list filtering. | |
01789349 JP |
792 | * If driver handles unicast address filtering, it should set |
793 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
794 | * |
795 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
796 | * This function is called when the Media Access Control address | |
37b607c5 | 797 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
798 | * mac address can not be changed. |
799 | * | |
800 | * int (*ndo_validate_addr)(struct net_device *dev); | |
801 | * Test if Media Access Control address is valid for the device. | |
802 | * | |
803 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
804 | * Called when a user request an ioctl which can't be handled by | |
805 | * the generic interface code. If not defined ioctl's return | |
806 | * not supported error code. | |
807 | * | |
808 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
809 | * Used to set network devices bus interface parameters. This interface | |
810 | * is retained for legacy reason, new devices should use the bus | |
811 | * interface (PCI) for low level management. | |
812 | * | |
813 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
814 | * Called when a user wants to change the Maximum Transfer Unit | |
815 | * of a device. If not defined, any request to change MTU will | |
816 | * will return an error. | |
817 | * | |
00829823 | 818 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
819 | * Callback uses when the transmitter has not made any progress |
820 | * for dev->watchdog ticks. | |
821 | * | |
3cfde79c | 822 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 823 | * struct rtnl_link_stats64 *storage); |
d308e38f | 824 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 825 | * Called when a user wants to get the network device usage |
be1f3c2c | 826 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
827 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
828 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 829 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
830 | * (which should normally be dev->stats) and return a pointer to |
831 | * it. The structure may be changed asynchronously only if each | |
832 | * field is written atomically. | |
833 | * 3. Update dev->stats asynchronously and atomically, and define | |
834 | * neither operation. | |
d314774c | 835 | * |
80d5c368 PM |
836 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
837 | * If device support VLAN filtering this function is called when a | |
838 | * VLAN id is registered. | |
d314774c | 839 | * |
8e586137 | 840 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
80d5c368 PM |
841 | * If device support VLAN filtering this function is called when a |
842 | * VLAN id is unregistered. | |
d314774c SH |
843 | * |
844 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
845 | * |
846 | * SR-IOV management functions. | |
847 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
848 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
849 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
5f8444a3 | 850 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
851 | * int (*ndo_get_vf_config)(struct net_device *dev, |
852 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 853 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
854 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
855 | * struct nlattr *port[]); | |
856 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
857 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
858 | * Called to setup 'tc' number of traffic classes in the net device. This | |
859 | * is always called from the stack with the rtnl lock held and netif tx | |
860 | * queues stopped. This allows the netdevice to perform queue management | |
861 | * safely. | |
c445477d | 862 | * |
e9bce845 YZ |
863 | * Fiber Channel over Ethernet (FCoE) offload functions. |
864 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
865 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
866 | * so the underlying device can perform whatever needed configuration or | |
867 | * initialization to support acceleration of FCoE traffic. | |
868 | * | |
869 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
870 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
871 | * so the underlying device can perform whatever needed clean-ups to | |
872 | * stop supporting acceleration of FCoE traffic. | |
873 | * | |
874 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
875 | * struct scatterlist *sgl, unsigned int sgc); | |
876 | * Called when the FCoE Initiator wants to initialize an I/O that | |
877 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
878 | * perform necessary setup and returns 1 to indicate the device is set up | |
879 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
880 | * | |
881 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
882 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
883 | * indicated by the FC exchange id 'xid', so the underlying device can | |
884 | * clean up and reuse resources for later DDP requests. | |
885 | * | |
886 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
887 | * struct scatterlist *sgl, unsigned int sgc); | |
888 | * Called when the FCoE Target wants to initialize an I/O that | |
889 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
890 | * perform necessary setup and returns 1 to indicate the device is set up | |
891 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
892 | * | |
68bad94e NP |
893 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
894 | * struct netdev_fcoe_hbainfo *hbainfo); | |
895 | * Called when the FCoE Protocol stack wants information on the underlying | |
896 | * device. This information is utilized by the FCoE protocol stack to | |
897 | * register attributes with Fiber Channel management service as per the | |
898 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
899 | * | |
e9bce845 YZ |
900 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
901 | * Called when the underlying device wants to override default World Wide | |
902 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
903 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
904 | * protocol stack to use. | |
905 | * | |
c445477d BH |
906 | * RFS acceleration. |
907 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
908 | * u16 rxq_index, u32 flow_id); | |
909 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
910 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
911 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 912 | * |
8b98a70c | 913 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
914 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
915 | * Called to make another netdev an underling. | |
916 | * | |
917 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
918 | * Called to release previously enslaved netdev. | |
5455c699 MM |
919 | * |
920 | * Feature/offload setting functions. | |
c8f44aff MM |
921 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
922 | * netdev_features_t features); | |
5455c699 MM |
923 | * Adjusts the requested feature flags according to device-specific |
924 | * constraints, and returns the resulting flags. Must not modify | |
925 | * the device state. | |
926 | * | |
c8f44aff | 927 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
928 | * Called to update device configuration to new features. Passed |
929 | * feature set might be less than what was returned by ndo_fix_features()). | |
930 | * Must return >0 or -errno if it changed dev->features itself. | |
931 | * | |
edc7d573 | 932 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
933 | * struct net_device *dev, | |
6b6e2725 | 934 | * const unsigned char *addr, u16 flags) |
77162022 | 935 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
936 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
937 | * struct net_device *dev, | |
6b6e2725 | 938 | * const unsigned char *addr) |
77162022 JF |
939 | * Deletes the FDB entry from dev coresponding to addr. |
940 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
941 | * struct net_device *dev, int idx) | |
942 | * Used to add FDB entries to dump requests. Implementers should add | |
943 | * entries to skb and update idx with the number of entries. | |
e5a55a89 JF |
944 | * |
945 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) | |
946 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, | |
24f11a5c | 947 | * struct net_device *dev, u32 filter_mask) |
4bf84c35 JP |
948 | * |
949 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
950 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
951 | * which do not represent real hardware may define this to allow their | |
952 | * userspace components to manage their virtual carrier state. Devices | |
953 | * that determine carrier state from physical hardware properties (eg | |
954 | * network cables) or protocol-dependent mechanisms (eg | |
955 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
956 | * |
957 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
958 | * struct netdev_phys_port_id *ppid); | |
959 | * Called to get ID of physical port of this device. If driver does | |
960 | * not implement this, it is assumed that the hw is not able to have | |
961 | * multiple net devices on single physical port. | |
53cf5275 JG |
962 | * |
963 | * void (*ndo_add_vxlan_port)(struct net_device *dev, | |
35e42379 | 964 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
965 | * Called by vxlan to notiy a driver about the UDP port and socket |
966 | * address family that vxlan is listnening to. It is called only when | |
967 | * a new port starts listening. The operation is protected by the | |
968 | * vxlan_net->sock_lock. | |
969 | * | |
970 | * void (*ndo_del_vxlan_port)(struct net_device *dev, | |
35e42379 | 971 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
972 | * Called by vxlan to notify the driver about a UDP port and socket |
973 | * address family that vxlan is not listening to anymore. The operation | |
974 | * is protected by the vxlan_net->sock_lock. | |
a6cc0cfa JF |
975 | * |
976 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
977 | * struct net_device *dev) | |
978 | * Called by upper layer devices to accelerate switching or other | |
979 | * station functionality into hardware. 'pdev is the lowerdev | |
980 | * to use for the offload and 'dev' is the net device that will | |
981 | * back the offload. Returns a pointer to the private structure | |
982 | * the upper layer will maintain. | |
983 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
984 | * Called by upper layer device to delete the station created | |
985 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
986 | * the station and priv is the structure returned by the add | |
987 | * operation. | |
988 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, | |
989 | * struct net_device *dev, | |
990 | * void *priv); | |
991 | * Callback to use for xmit over the accelerated station. This | |
992 | * is used in place of ndo_start_xmit on accelerated net | |
993 | * devices. | |
d314774c SH |
994 | */ |
995 | struct net_device_ops { | |
996 | int (*ndo_init)(struct net_device *dev); | |
997 | void (*ndo_uninit)(struct net_device *dev); | |
998 | int (*ndo_open)(struct net_device *dev); | |
999 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 1000 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
1001 | struct net_device *dev); |
1002 | u16 (*ndo_select_queue)(struct net_device *dev, | |
f663dd9a | 1003 | struct sk_buff *skb, |
99932d4f DB |
1004 | void *accel_priv, |
1005 | select_queue_fallback_t fallback); | |
d314774c SH |
1006 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1007 | int flags); | |
d314774c | 1008 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1009 | int (*ndo_set_mac_address)(struct net_device *dev, |
1010 | void *addr); | |
d314774c | 1011 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1012 | int (*ndo_do_ioctl)(struct net_device *dev, |
1013 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1014 | int (*ndo_set_config)(struct net_device *dev, |
1015 | struct ifmap *map); | |
00829823 SH |
1016 | int (*ndo_change_mtu)(struct net_device *dev, |
1017 | int new_mtu); | |
1018 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1019 | struct neigh_parms *); | |
d314774c SH |
1020 | void (*ndo_tx_timeout) (struct net_device *dev); |
1021 | ||
28172739 ED |
1022 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
1023 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
1024 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1025 | ||
8e586137 | 1026 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1027 | __be16 proto, u16 vid); |
8e586137 | 1028 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1029 | __be16 proto, u16 vid); |
d314774c | 1030 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1031 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1032 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1033 | struct netpoll_info *info); |
0e34e931 | 1034 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 | 1035 | #endif |
e0d1095a | 1036 | #ifdef CONFIG_NET_RX_BUSY_POLL |
8b80cda5 | 1037 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 1038 | #endif |
95c26df8 WM |
1039 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1040 | int queue, u8 *mac); | |
1041 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
1042 | int queue, u16 vlan, u8 qos); | |
1043 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
1044 | int vf, int rate); | |
5f8444a3 GR |
1045 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1046 | int vf, bool setting); | |
95c26df8 WM |
1047 | int (*ndo_get_vf_config)(struct net_device *dev, |
1048 | int vf, | |
1049 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1050 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1051 | int vf, int link_state); | |
57b61080 SF |
1052 | int (*ndo_set_vf_port)(struct net_device *dev, |
1053 | int vf, | |
1054 | struct nlattr *port[]); | |
1055 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1056 | int vf, struct sk_buff *skb); | |
4f57c087 | 1057 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
d11ead75 | 1058 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1059 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1060 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1061 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1062 | u16 xid, | |
1063 | struct scatterlist *sgl, | |
1064 | unsigned int sgc); | |
1065 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1066 | u16 xid); | |
6247e086 YZ |
1067 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1068 | u16 xid, | |
1069 | struct scatterlist *sgl, | |
1070 | unsigned int sgc); | |
68bad94e NP |
1071 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1072 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1073 | #endif |
1074 | ||
d11ead75 | 1075 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1076 | #define NETDEV_FCOE_WWNN 0 |
1077 | #define NETDEV_FCOE_WWPN 1 | |
1078 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1079 | u64 *wwn, int type); | |
4d288d57 | 1080 | #endif |
3c9c36bc | 1081 | |
c445477d BH |
1082 | #ifdef CONFIG_RFS_ACCEL |
1083 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1084 | const struct sk_buff *skb, | |
1085 | u16 rxq_index, | |
1086 | u32 flow_id); | |
1087 | #endif | |
fbaec0ea JP |
1088 | int (*ndo_add_slave)(struct net_device *dev, |
1089 | struct net_device *slave_dev); | |
1090 | int (*ndo_del_slave)(struct net_device *dev, | |
1091 | struct net_device *slave_dev); | |
c8f44aff MM |
1092 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1093 | netdev_features_t features); | |
5455c699 | 1094 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1095 | netdev_features_t features); |
da6a8fa0 | 1096 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1097 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1098 | |
1099 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1100 | struct nlattr *tb[], |
77162022 | 1101 | struct net_device *dev, |
6b6e2725 | 1102 | const unsigned char *addr, |
77162022 JF |
1103 | u16 flags); |
1104 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1105 | struct nlattr *tb[], |
77162022 | 1106 | struct net_device *dev, |
6b6e2725 | 1107 | const unsigned char *addr); |
77162022 JF |
1108 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1109 | struct netlink_callback *cb, | |
1110 | struct net_device *dev, | |
1111 | int idx); | |
e5a55a89 JF |
1112 | |
1113 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
1114 | struct nlmsghdr *nlh); | |
1115 | int (*ndo_bridge_getlink)(struct sk_buff *skb, | |
1116 | u32 pid, u32 seq, | |
6cbdceeb VY |
1117 | struct net_device *dev, |
1118 | u32 filter_mask); | |
407af329 VY |
1119 | int (*ndo_bridge_dellink)(struct net_device *dev, |
1120 | struct nlmsghdr *nlh); | |
4bf84c35 JP |
1121 | int (*ndo_change_carrier)(struct net_device *dev, |
1122 | bool new_carrier); | |
66b52b0d JP |
1123 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
1124 | struct netdev_phys_port_id *ppid); | |
53cf5275 JG |
1125 | void (*ndo_add_vxlan_port)(struct net_device *dev, |
1126 | sa_family_t sa_family, | |
35e42379 | 1127 | __be16 port); |
53cf5275 JG |
1128 | void (*ndo_del_vxlan_port)(struct net_device *dev, |
1129 | sa_family_t sa_family, | |
35e42379 | 1130 | __be16 port); |
a6cc0cfa JF |
1131 | |
1132 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
1133 | struct net_device *dev); | |
1134 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1135 | void *priv); | |
1136 | ||
1137 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, | |
1138 | struct net_device *dev, | |
1139 | void *priv); | |
d314774c SH |
1140 | }; |
1141 | ||
7aa98047 LR |
1142 | /** |
1143 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1144 | * | |
1145 | * These are the &struct net_device, they are only set internally | |
1146 | * by drivers and used in the kernel. These flags are invisible to | |
1147 | * userspace, this means that the order of these flags can change | |
1148 | * during any kernel release. | |
1149 | * | |
1150 | * You should have a pretty good reason to be extending these flags. | |
1151 | * | |
1152 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1153 | * @IFF_EBRIDGE: Ethernet bridging device | |
1154 | * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active | |
1155 | * @IFF_MASTER_8023AD: bonding master, 802.3ad | |
1156 | * @IFF_MASTER_ALB: bonding master, balance-alb | |
1157 | * @IFF_BONDING: bonding master or slave | |
1158 | * @IFF_SLAVE_NEEDARP: need ARPs for validation | |
1159 | * @IFF_ISATAP: ISATAP interface (RFC4214) | |
1160 | * @IFF_MASTER_ARPMON: bonding master, ARP mon in use | |
1161 | * @IFF_WAN_HDLC: WAN HDLC device | |
1162 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1163 | * release skb->dst | |
1164 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1165 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1166 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1167 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1168 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1169 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1170 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1171 | * @IFF_TEAM_PORT: device used as team port | |
1172 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1173 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1174 | * change when it's running | |
1175 | * @IFF_MACVLAN: Macvlan device | |
1176 | */ | |
1177 | enum netdev_priv_flags { | |
1178 | IFF_802_1Q_VLAN = 1<<0, | |
1179 | IFF_EBRIDGE = 1<<1, | |
1180 | IFF_SLAVE_INACTIVE = 1<<2, | |
1181 | IFF_MASTER_8023AD = 1<<3, | |
1182 | IFF_MASTER_ALB = 1<<4, | |
1183 | IFF_BONDING = 1<<5, | |
1184 | IFF_SLAVE_NEEDARP = 1<<6, | |
1185 | IFF_ISATAP = 1<<7, | |
1186 | IFF_MASTER_ARPMON = 1<<8, | |
1187 | IFF_WAN_HDLC = 1<<9, | |
1188 | IFF_XMIT_DST_RELEASE = 1<<10, | |
1189 | IFF_DONT_BRIDGE = 1<<11, | |
1190 | IFF_DISABLE_NETPOLL = 1<<12, | |
1191 | IFF_MACVLAN_PORT = 1<<13, | |
1192 | IFF_BRIDGE_PORT = 1<<14, | |
1193 | IFF_OVS_DATAPATH = 1<<15, | |
1194 | IFF_TX_SKB_SHARING = 1<<16, | |
1195 | IFF_UNICAST_FLT = 1<<17, | |
1196 | IFF_TEAM_PORT = 1<<18, | |
1197 | IFF_SUPP_NOFCS = 1<<19, | |
1198 | IFF_LIVE_ADDR_CHANGE = 1<<20, | |
1199 | IFF_MACVLAN = 1<<21, | |
1200 | }; | |
1201 | ||
1202 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1203 | #define IFF_EBRIDGE IFF_EBRIDGE | |
1204 | #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE | |
1205 | #define IFF_MASTER_8023AD IFF_MASTER_8023AD | |
1206 | #define IFF_MASTER_ALB IFF_MASTER_ALB | |
1207 | #define IFF_BONDING IFF_BONDING | |
1208 | #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP | |
1209 | #define IFF_ISATAP IFF_ISATAP | |
1210 | #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON | |
1211 | #define IFF_WAN_HDLC IFF_WAN_HDLC | |
1212 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1213 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1214 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1215 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1216 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1217 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1218 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1219 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1220 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1221 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1222 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1223 | #define IFF_MACVLAN IFF_MACVLAN | |
1224 | ||
1da177e4 LT |
1225 | /* |
1226 | * The DEVICE structure. | |
1227 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1228 | * data with strictly "high-level" data, and it has to know about | |
1229 | * almost every data structure used in the INET module. | |
1230 | * | |
1231 | * FIXME: cleanup struct net_device such that network protocol info | |
1232 | * moves out. | |
1233 | */ | |
1234 | ||
d94d9fee | 1235 | struct net_device { |
1da177e4 LT |
1236 | |
1237 | /* | |
1238 | * This is the first field of the "visible" part of this structure | |
1239 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
724df615 | 1240 | * of the interface. |
1da177e4 LT |
1241 | */ |
1242 | char name[IFNAMSIZ]; | |
ed77134b | 1243 | |
9136461a | 1244 | /* device name hash chain, please keep it close to name[] */ |
9356b8fc | 1245 | struct hlist_node name_hlist; |
9136461a | 1246 | |
0b815a1a SH |
1247 | /* snmp alias */ |
1248 | char *ifalias; | |
1da177e4 LT |
1249 | |
1250 | /* | |
1251 | * I/O specific fields | |
1252 | * FIXME: Merge these and struct ifmap into one | |
1253 | */ | |
1254 | unsigned long mem_end; /* shared mem end */ | |
1255 | unsigned long mem_start; /* shared mem start */ | |
1256 | unsigned long base_addr; /* device I/O address */ | |
df42153c | 1257 | int irq; /* device IRQ number */ |
1da177e4 LT |
1258 | |
1259 | /* | |
1260 | * Some hardware also needs these fields, but they are not | |
1261 | * part of the usual set specified in Space.c. | |
1262 | */ | |
1263 | ||
1da177e4 LT |
1264 | unsigned long state; |
1265 | ||
7562f876 | 1266 | struct list_head dev_list; |
bea3348e | 1267 | struct list_head napi_list; |
44a0873d | 1268 | struct list_head unreg_list; |
5cde2829 | 1269 | struct list_head close_list; |
2f268f12 VF |
1270 | |
1271 | /* directly linked devices, like slaves for bonding */ | |
1272 | struct { | |
1273 | struct list_head upper; | |
1274 | struct list_head lower; | |
1275 | } adj_list; | |
1276 | ||
1277 | /* all linked devices, *including* neighbours */ | |
1278 | struct { | |
1279 | struct list_head upper; | |
1280 | struct list_head lower; | |
1281 | } all_adj_list; | |
4c3d5e7b | 1282 | |
1da177e4 | 1283 | |
5455c699 | 1284 | /* currently active device features */ |
c8f44aff | 1285 | netdev_features_t features; |
5455c699 | 1286 | /* user-changeable features */ |
c8f44aff | 1287 | netdev_features_t hw_features; |
5455c699 | 1288 | /* user-requested features */ |
c8f44aff | 1289 | netdev_features_t wanted_features; |
1aac6267 | 1290 | /* mask of features inheritable by VLAN devices */ |
c8f44aff | 1291 | netdev_features_t vlan_features; |
6a674e9c JG |
1292 | /* mask of features inherited by encapsulating devices |
1293 | * This field indicates what encapsulation offloads | |
1294 | * the hardware is capable of doing, and drivers will | |
1295 | * need to set them appropriately. | |
1296 | */ | |
1297 | netdev_features_t hw_enc_features; | |
0d89d203 SH |
1298 | /* mask of fetures inheritable by MPLS */ |
1299 | netdev_features_t mpls_features; | |
04ed3e74 | 1300 | |
1da177e4 LT |
1301 | /* Interface index. Unique device identifier */ |
1302 | int ifindex; | |
1303 | int iflink; | |
1304 | ||
c45d286e | 1305 | struct net_device_stats stats; |
015f0688 ED |
1306 | |
1307 | /* dropped packets by core network, Do not use this in drivers */ | |
1308 | atomic_long_t rx_dropped; | |
1309 | atomic_long_t tx_dropped; | |
1da177e4 | 1310 | |
b86e0280 | 1311 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
1312 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1313 | * See <net/iw_handler.h> for details. Jean II */ | |
1314 | const struct iw_handler_def * wireless_handlers; | |
1315 | /* Instance data managed by the core of Wireless Extensions. */ | |
1316 | struct iw_public_data * wireless_data; | |
b86e0280 | 1317 | #endif |
d314774c SH |
1318 | /* Management operations */ |
1319 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 1320 | const struct ethtool_ops *ethtool_ops; |
a6cc0cfa | 1321 | const struct forwarding_accel_ops *fwd_ops; |
1da177e4 | 1322 | |
3b04ddde SH |
1323 | /* Hardware header description */ |
1324 | const struct header_ops *header_ops; | |
1325 | ||
b00055aa | 1326 | unsigned int flags; /* interface flags (a la BSD) */ |
3bdc0eba BG |
1327 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
1328 | * See if.h for definitions. */ | |
1da177e4 | 1329 | unsigned short gflags; |
1da177e4 LT |
1330 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1331 | ||
b00055aa SR |
1332 | unsigned char operstate; /* RFC2863 operstate */ |
1333 | unsigned char link_mode; /* mapping policy to operstate */ | |
1334 | ||
bdc220da JP |
1335 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1336 | unsigned char dma; /* DMA channel */ | |
1337 | ||
cd7b5396 | 1338 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
1339 | unsigned short type; /* interface hardware type */ |
1340 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 1341 | |
f5184d26 JB |
1342 | /* extra head- and tailroom the hardware may need, but not in all cases |
1343 | * can this be guaranteed, especially tailroom. Some cases also use | |
1344 | * LL_MAX_HEADER instead to allocate the skb. | |
1345 | */ | |
1346 | unsigned short needed_headroom; | |
1347 | unsigned short needed_tailroom; | |
1348 | ||
1da177e4 | 1349 | /* Interface address info. */ |
a6f9a705 | 1350 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
c1f79426 | 1351 | unsigned char addr_assign_type; /* hw address assignment type */ |
1da177e4 | 1352 | unsigned char addr_len; /* hardware address length */ |
a0a9663d | 1353 | unsigned short neigh_priv_len; |
dffebd2c N |
1354 | unsigned short dev_id; /* Used to differentiate devices |
1355 | * that share the same link | |
1356 | * layer address | |
1357 | */ | |
3f85944f AV |
1358 | unsigned short dev_port; /* Used to differentiate |
1359 | * devices that share the same | |
1360 | * function | |
1361 | */ | |
ccffad25 | 1362 | spinlock_t addr_list_lock; |
22bedad3 JP |
1363 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1364 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
4c3d5e7b ED |
1365 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1366 | * hw addresses | |
1367 | */ | |
1368 | #ifdef CONFIG_SYSFS | |
1369 | struct kset *queues_kset; | |
1370 | #endif | |
1371 | ||
2d348d1f | 1372 | bool uc_promisc; |
9d45abe1 WC |
1373 | unsigned int promiscuity; |
1374 | unsigned int allmulti; | |
1da177e4 | 1375 | |
1da177e4 LT |
1376 | |
1377 | /* Protocol specific pointers */ | |
65ac6a5f | 1378 | |
d11ead75 | 1379 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
5b9ea6e0 | 1380 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
65ac6a5f | 1381 | #endif |
34a430d7 | 1382 | #if IS_ENABLED(CONFIG_NET_DSA) |
cf50dcc2 | 1383 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
37cb0620 YX |
1384 | #endif |
1385 | #if IS_ENABLED(CONFIG_TIPC) | |
1386 | struct tipc_bearer __rcu *tipc_ptr; /* TIPC specific data */ | |
91da11f8 | 1387 | #endif |
1da177e4 | 1388 | void *atalk_ptr; /* AppleTalk link */ |
95ae6b22 | 1389 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
fc766e4c | 1390 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
198caeca | 1391 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1da177e4 | 1392 | void *ax25_ptr; /* AX.25 specific data */ |
704232c2 JB |
1393 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1394 | assign before registering */ | |
1da177e4 | 1395 | |
9356b8fc | 1396 | /* |
cd13539b | 1397 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1398 | */ |
f8ff080d | 1399 | unsigned long last_rx; /* Time of last Rx */ |
4dc89133 | 1400 | |
9356b8fc | 1401 | /* Interface address info used in eth_type_trans() */ |
f001fde5 JP |
1402 | unsigned char *dev_addr; /* hw address, (before bcast |
1403 | because most packets are | |
1404 | unicast) */ | |
1405 | ||
0a9627f2 | 1406 | |
a953be53 | 1407 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1408 | struct netdev_rx_queue *_rx; |
1409 | ||
62fe0b40 | 1410 | /* Number of RX queues allocated at register_netdev() time */ |
0a9627f2 | 1411 | unsigned int num_rx_queues; |
62fe0b40 BH |
1412 | |
1413 | /* Number of RX queues currently active in device */ | |
1414 | unsigned int real_num_rx_queues; | |
c445477d | 1415 | |
df334545 | 1416 | #endif |
0a9627f2 | 1417 | |
61391cde | 1418 | rx_handler_func_t __rcu *rx_handler; |
1419 | void __rcu *rx_handler_data; | |
e8a0464c | 1420 | |
24824a09 | 1421 | struct netdev_queue __rcu *ingress_queue; |
4c3d5e7b ED |
1422 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
1423 | ||
cd13539b ED |
1424 | |
1425 | /* | |
1426 | * Cache lines mostly used on transmit path | |
1427 | */ | |
e8a0464c | 1428 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
fd2ea0a7 DM |
1429 | |
1430 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 1431 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
1432 | |
1433 | /* Number of TX queues currently active in device */ | |
1434 | unsigned int real_num_tx_queues; | |
1435 | ||
af356afa PM |
1436 | /* root qdisc from userspace point of view */ |
1437 | struct Qdisc *qdisc; | |
1438 | ||
1da177e4 | 1439 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 1440 | spinlock_t tx_global_lock; |
cd13539b | 1441 | |
bf264145 | 1442 | #ifdef CONFIG_XPS |
a4177869 | 1443 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1444 | #endif |
4c3d5e7b ED |
1445 | #ifdef CONFIG_RFS_ACCEL |
1446 | /* CPU reverse-mapping for RX completion interrupts, indexed | |
1447 | * by RX queue number. Assigned by driver. This must only be | |
1448 | * set if the ndo_rx_flow_steer operation is defined. */ | |
1449 | struct cpu_rmap *rx_cpu_rmap; | |
1450 | #endif | |
1d24eb48 | 1451 | |
9356b8fc | 1452 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1453 | |
1454 | /* | |
1455 | * trans_start here is expensive for high speed devices on SMP, | |
1456 | * please use netdev_queue->trans_start instead. | |
1457 | */ | |
9356b8fc ED |
1458 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1459 | ||
1460 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1461 | struct timer_list watchdog_timer; | |
1462 | ||
1da177e4 | 1463 | /* Number of references to this device */ |
29b4433d | 1464 | int __percpu *pcpu_refcnt; |
9356b8fc | 1465 | |
1da177e4 LT |
1466 | /* delayed register/unregister */ |
1467 | struct list_head todo_list; | |
1da177e4 LT |
1468 | /* device index hash chain */ |
1469 | struct hlist_node index_hlist; | |
1470 | ||
e014debe | 1471 | struct list_head link_watch_list; |
572a103d | 1472 | |
1da177e4 LT |
1473 | /* register/unregister state machine */ |
1474 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1475 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1476 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1477 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1478 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1479 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1480 | } reg_state:8; |
1481 | ||
1482 | bool dismantle; /* device is going do be freed */ | |
a2835763 PM |
1483 | |
1484 | enum { | |
1485 | RTNL_LINK_INITIALIZED, | |
1486 | RTNL_LINK_INITIALIZING, | |
1487 | } rtnl_link_state:16; | |
1da177e4 | 1488 | |
d314774c SH |
1489 | /* Called from unregister, can be used to call free_netdev */ |
1490 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1491 | |
1da177e4 | 1492 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1493 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1494 | #endif |
eae792b7 | 1495 | |
c346dca1 | 1496 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1497 | /* Network namespace this network device is inside */ |
1498 | struct net *nd_net; | |
c346dca1 | 1499 | #endif |
4a1c5371 | 1500 | |
4951704b | 1501 | /* mid-layer private */ |
a7855c78 ED |
1502 | union { |
1503 | void *ml_priv; | |
1504 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ | |
8f84985f | 1505 | struct pcpu_sw_netstats __percpu *tstats; |
6d81f41c | 1506 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
2681128f | 1507 | struct pcpu_vstats __percpu *vstats; /* veth stats */ |
a7855c78 | 1508 | }; |
eca9ebac | 1509 | /* GARP */ |
3cc77ec7 | 1510 | struct garp_port __rcu *garp_port; |
febf018d DW |
1511 | /* MRP */ |
1512 | struct mrp_port __rcu *mrp_port; | |
1da177e4 | 1513 | |
1da177e4 | 1514 | /* class/net/name entry */ |
43cb76d9 | 1515 | struct device dev; |
0c509a6c EB |
1516 | /* space for optional device, statistics, and wireless sysfs groups */ |
1517 | const struct attribute_group *sysfs_groups[4]; | |
a953be53 MD |
1518 | /* space for optional per-rx queue attributes */ |
1519 | const struct attribute_group *sysfs_rx_queue_group; | |
38f7b870 PM |
1520 | |
1521 | /* rtnetlink link ops */ | |
1522 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1523 | |
82cc1a7a PWJ |
1524 | /* for setting kernel sock attribute on TCP connection setup */ |
1525 | #define GSO_MAX_SIZE 65536 | |
1526 | unsigned int gso_max_size; | |
30b678d8 BH |
1527 | #define GSO_MAX_SEGS 65535 |
1528 | u16 gso_max_segs; | |
d314774c | 1529 | |
7a6b6f51 | 1530 | #ifdef CONFIG_DCB |
2f90b865 | 1531 | /* Data Center Bridging netlink ops */ |
32953543 | 1532 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1533 | #endif |
4f57c087 JF |
1534 | u8 num_tc; |
1535 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1536 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1537 | |
d11ead75 | 1538 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 YZ |
1539 | /* max exchange id for FCoE LRO by ddp */ |
1540 | unsigned int fcoe_ddp_xid; | |
5bc1421e | 1541 | #endif |
86f8515f | 1542 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1543 | struct netprio_map __rcu *priomap; |
4d288d57 | 1544 | #endif |
c1f19b51 RC |
1545 | /* phy device may attach itself for hardware timestamping */ |
1546 | struct phy_device *phydev; | |
cbda10fa | 1547 | |
23d3b8bf ED |
1548 | struct lock_class_key *qdisc_tx_busylock; |
1549 | ||
cbda10fa VD |
1550 | /* group the device belongs to */ |
1551 | int group; | |
9136461a ED |
1552 | |
1553 | struct pm_qos_request pm_qos_req; | |
1da177e4 | 1554 | }; |
43cb76d9 | 1555 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1556 | |
1557 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1558 | |
4f57c087 JF |
1559 | static inline |
1560 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1561 | { | |
1562 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1563 | } | |
1564 | ||
1565 | static inline | |
1566 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1567 | { | |
1568 | if (tc >= dev->num_tc) | |
1569 | return -EINVAL; | |
1570 | ||
1571 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1572 | return 0; | |
1573 | } | |
1574 | ||
1575 | static inline | |
1576 | void netdev_reset_tc(struct net_device *dev) | |
1577 | { | |
1578 | dev->num_tc = 0; | |
1579 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1580 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1581 | } | |
1582 | ||
1583 | static inline | |
1584 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1585 | { | |
1586 | if (tc >= dev->num_tc) | |
1587 | return -EINVAL; | |
1588 | ||
1589 | dev->tc_to_txq[tc].count = count; | |
1590 | dev->tc_to_txq[tc].offset = offset; | |
1591 | return 0; | |
1592 | } | |
1593 | ||
1594 | static inline | |
1595 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1596 | { | |
1597 | if (num_tc > TC_MAX_QUEUE) | |
1598 | return -EINVAL; | |
1599 | ||
1600 | dev->num_tc = num_tc; | |
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | static inline | |
1605 | int netdev_get_num_tc(struct net_device *dev) | |
1606 | { | |
1607 | return dev->num_tc; | |
1608 | } | |
1609 | ||
e8a0464c DM |
1610 | static inline |
1611 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1612 | unsigned int index) | |
1613 | { | |
1614 | return &dev->_tx[index]; | |
1615 | } | |
1616 | ||
1617 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1618 | void (*f)(struct net_device *, | |
1619 | struct netdev_queue *, | |
1620 | void *), | |
1621 | void *arg) | |
1622 | { | |
1623 | unsigned int i; | |
1624 | ||
1625 | for (i = 0; i < dev->num_tx_queues; i++) | |
1626 | f(dev, &dev->_tx[i], arg); | |
1627 | } | |
1628 | ||
f629d208 | 1629 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
1630 | struct sk_buff *skb, |
1631 | void *accel_priv); | |
8c4c49df | 1632 | |
c346dca1 YH |
1633 | /* |
1634 | * Net namespace inlines | |
1635 | */ | |
1636 | static inline | |
1637 | struct net *dev_net(const struct net_device *dev) | |
1638 | { | |
c2d9ba9b | 1639 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1640 | } |
1641 | ||
1642 | static inline | |
f5aa23fd | 1643 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1644 | { |
1645 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1646 | release_net(dev->nd_net); |
1647 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1648 | #endif |
1649 | } | |
1650 | ||
cf85d08f LB |
1651 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1652 | { | |
1653 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1654 | if (dev->dsa_ptr != NULL) | |
1655 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1656 | #endif | |
1657 | ||
1658 | return 0; | |
1659 | } | |
1660 | ||
396138f0 LB |
1661 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1662 | { | |
1663 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1664 | if (dev->dsa_ptr != NULL) | |
1665 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1666 | #endif | |
1667 | ||
1668 | return 0; | |
1669 | } | |
1670 | ||
bea3348e SH |
1671 | /** |
1672 | * netdev_priv - access network device private data | |
1673 | * @dev: network device | |
1674 | * | |
1675 | * Get network device private data | |
1676 | */ | |
6472ce60 | 1677 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1678 | { |
1ce8e7b5 | 1679 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1680 | } |
1681 | ||
1da177e4 LT |
1682 | /* Set the sysfs physical device reference for the network logical device |
1683 | * if set prior to registration will cause a symlink during initialization. | |
1684 | */ | |
43cb76d9 | 1685 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1686 | |
384912ed | 1687 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 1688 | * fine-grained identification of different network device types. For |
384912ed MH |
1689 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
1690 | */ | |
1691 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1692 | ||
82dc3c63 ED |
1693 | /* Default NAPI poll() weight |
1694 | * Device drivers are strongly advised to not use bigger value | |
1695 | */ | |
1696 | #define NAPI_POLL_WEIGHT 64 | |
1697 | ||
3b582cc1 SH |
1698 | /** |
1699 | * netif_napi_add - initialize a napi context | |
1700 | * @dev: network device | |
1701 | * @napi: napi context | |
1702 | * @poll: polling function | |
1703 | * @weight: default weight | |
1704 | * | |
1705 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1706 | * *any* of the other napi related functions. | |
1707 | */ | |
d565b0a1 HX |
1708 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1709 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1710 | |
d8156534 AD |
1711 | /** |
1712 | * netif_napi_del - remove a napi context | |
1713 | * @napi: napi context | |
1714 | * | |
1715 | * netif_napi_del() removes a napi context from the network device napi list | |
1716 | */ | |
d565b0a1 HX |
1717 | void netif_napi_del(struct napi_struct *napi); |
1718 | ||
1719 | struct napi_gro_cb { | |
78a478d0 HX |
1720 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1721 | void *frag0; | |
1722 | ||
7489594c HX |
1723 | /* Length of frag0. */ |
1724 | unsigned int frag0_len; | |
1725 | ||
86911732 HX |
1726 | /* This indicates where we are processing relative to skb->data. */ |
1727 | int data_offset; | |
1728 | ||
d565b0a1 | 1729 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
1730 | u16 flush; |
1731 | ||
1732 | /* Save the IP ID here and check when we get to the transport layer */ | |
1733 | u16 flush_id; | |
d565b0a1 HX |
1734 | |
1735 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
1736 | u16 count; |
1737 | ||
1738 | /* This is non-zero if the packet may be of the same flow. */ | |
1739 | u8 same_flow; | |
5d38a079 HX |
1740 | |
1741 | /* Free the skb? */ | |
2e71a6f8 | 1742 | u8 free; |
d7e8883c ED |
1743 | #define NAPI_GRO_FREE 1 |
1744 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2e71a6f8 ED |
1745 | |
1746 | /* jiffies when first packet was created/queued */ | |
1747 | unsigned long age; | |
86347245 ED |
1748 | |
1749 | /* Used in ipv6_gro_receive() */ | |
b582ef09 OG |
1750 | u16 proto; |
1751 | ||
1752 | /* Used in udp_gro_receive */ | |
1753 | u16 udp_mark; | |
c3c7c254 | 1754 | |
bf5a755f JC |
1755 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
1756 | __wsum csum; | |
1757 | ||
c3c7c254 ED |
1758 | /* used in skb_gro_receive() slow path */ |
1759 | struct sk_buff *last; | |
d565b0a1 HX |
1760 | }; |
1761 | ||
1762 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1763 | |
1da177e4 | 1764 | struct packet_type { |
f2ccd8fa DM |
1765 | __be16 type; /* This is really htons(ether_type). */ |
1766 | struct net_device *dev; /* NULL is wildcarded here */ | |
1767 | int (*func) (struct sk_buff *, | |
1768 | struct net_device *, | |
1769 | struct packet_type *, | |
1770 | struct net_device *); | |
c0de08d0 EL |
1771 | bool (*id_match)(struct packet_type *ptype, |
1772 | struct sock *sk); | |
1da177e4 LT |
1773 | void *af_packet_priv; |
1774 | struct list_head list; | |
1775 | }; | |
1776 | ||
f191a1d1 | 1777 | struct offload_callbacks { |
576a30eb | 1778 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1779 | netdev_features_t features); |
a430a43d | 1780 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1781 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1782 | struct sk_buff *skb); | |
299603e8 | 1783 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
1784 | }; |
1785 | ||
1786 | struct packet_offload { | |
1787 | __be16 type; /* This is really htons(ether_type). */ | |
1788 | struct offload_callbacks callbacks; | |
1789 | struct list_head list; | |
1da177e4 LT |
1790 | }; |
1791 | ||
b582ef09 OG |
1792 | struct udp_offload { |
1793 | __be16 port; | |
1794 | struct offload_callbacks callbacks; | |
1795 | }; | |
1796 | ||
8f84985f LR |
1797 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
1798 | struct pcpu_sw_netstats { | |
1799 | u64 rx_packets; | |
1800 | u64 rx_bytes; | |
1801 | u64 tx_packets; | |
1802 | u64 tx_bytes; | |
1803 | struct u64_stats_sync syncp; | |
1804 | }; | |
1805 | ||
1c213bd2 WC |
1806 | #define netdev_alloc_pcpu_stats(type) \ |
1807 | ({ \ | |
693350c2 | 1808 | typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \ |
1c213bd2 WC |
1809 | if (pcpu_stats) { \ |
1810 | int i; \ | |
1811 | for_each_possible_cpu(i) { \ | |
1812 | typeof(type) *stat; \ | |
1813 | stat = per_cpu_ptr(pcpu_stats, i); \ | |
1814 | u64_stats_init(&stat->syncp); \ | |
1815 | } \ | |
1816 | } \ | |
1817 | pcpu_stats; \ | |
1818 | }) | |
1819 | ||
1da177e4 LT |
1820 | #include <linux/notifier.h> |
1821 | ||
dcfe1421 AW |
1822 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1823 | * notification exclusion list in rtnetlink_event() when adding new | |
1824 | * types. | |
1825 | */ | |
1826 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
1827 | #define NETDEV_DOWN 0x0002 | |
1828 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
1829 | detected a hardware crash and restarted | |
1830 | - we can use this eg to kick tcp sessions | |
1831 | once done */ | |
1832 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
1833 | #define NETDEV_REGISTER 0x0005 | |
1834 | #define NETDEV_UNREGISTER 0x0006 | |
1d486bfb | 1835 | #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */ |
dcfe1421 AW |
1836 | #define NETDEV_CHANGEADDR 0x0008 |
1837 | #define NETDEV_GOING_DOWN 0x0009 | |
1838 | #define NETDEV_CHANGENAME 0x000A | |
1839 | #define NETDEV_FEAT_CHANGE 0x000B | |
1840 | #define NETDEV_BONDING_FAILOVER 0x000C | |
1841 | #define NETDEV_PRE_UP 0x000D | |
1842 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
1843 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
1844 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 1845 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
1846 | #define NETDEV_RELEASE 0x0012 |
1847 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
1848 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 1849 | #define NETDEV_CHANGEUPPER 0x0015 |
4aa5dee4 | 1850 | #define NETDEV_RESEND_IGMP 0x0016 |
1d486bfb | 1851 | #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */ |
dcfe1421 | 1852 | |
f629d208 JP |
1853 | int register_netdevice_notifier(struct notifier_block *nb); |
1854 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
1855 | |
1856 | struct netdev_notifier_info { | |
1857 | struct net_device *dev; | |
1858 | }; | |
1859 | ||
be9efd36 JP |
1860 | struct netdev_notifier_change_info { |
1861 | struct netdev_notifier_info info; /* must be first */ | |
1862 | unsigned int flags_changed; | |
1863 | }; | |
1864 | ||
75538c2b CW |
1865 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
1866 | struct net_device *dev) | |
1867 | { | |
1868 | info->dev = dev; | |
1869 | } | |
1870 | ||
351638e7 JP |
1871 | static inline struct net_device * |
1872 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
1873 | { | |
1874 | return info->dev; | |
1875 | } | |
1876 | ||
f629d208 | 1877 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
1878 | |
1879 | ||
1da177e4 LT |
1880 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1881 | ||
881d966b EB |
1882 | #define for_each_netdev(net, d) \ |
1883 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1884 | #define for_each_netdev_reverse(net, d) \ |
1885 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1886 | #define for_each_netdev_rcu(net, d) \ |
1887 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1888 | #define for_each_netdev_safe(net, d, n) \ |
1889 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1890 | #define for_each_netdev_continue(net, d) \ | |
1891 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1892 | #define for_each_netdev_continue_rcu(net, d) \ |
1893 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 1894 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
1895 | for_each_netdev_rcu(&init_net, slave) \ | |
1896 | if (netdev_master_upper_dev_get_rcu(slave) == bond) | |
881d966b | 1897 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1898 | |
a050c33f DL |
1899 | static inline struct net_device *next_net_device(struct net_device *dev) |
1900 | { | |
1901 | struct list_head *lh; | |
1902 | struct net *net; | |
1903 | ||
c346dca1 | 1904 | net = dev_net(dev); |
a050c33f DL |
1905 | lh = dev->dev_list.next; |
1906 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1907 | } | |
1908 | ||
ce81b76a ED |
1909 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1910 | { | |
1911 | struct list_head *lh; | |
1912 | struct net *net; | |
1913 | ||
1914 | net = dev_net(dev); | |
ccf43438 | 1915 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
1916 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1917 | } | |
1918 | ||
a050c33f DL |
1919 | static inline struct net_device *first_net_device(struct net *net) |
1920 | { | |
1921 | return list_empty(&net->dev_base_head) ? NULL : | |
1922 | net_device_entry(net->dev_base_head.next); | |
1923 | } | |
7562f876 | 1924 | |
ccf43438 ED |
1925 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1926 | { | |
1927 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
1928 | ||
1929 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1930 | } | |
1931 | ||
f629d208 JP |
1932 | int netdev_boot_setup_check(struct net_device *dev); |
1933 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
1934 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
1935 | const char *hwaddr); | |
1936 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1937 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1938 | void dev_add_pack(struct packet_type *pt); | |
1939 | void dev_remove_pack(struct packet_type *pt); | |
1940 | void __dev_remove_pack(struct packet_type *pt); | |
1941 | void dev_add_offload(struct packet_offload *po); | |
1942 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 JP |
1943 | |
1944 | struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, | |
1945 | unsigned short mask); | |
1946 | struct net_device *dev_get_by_name(struct net *net, const char *name); | |
1947 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
1948 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
1949 | int dev_alloc_name(struct net_device *dev, const char *name); | |
1950 | int dev_open(struct net_device *dev); | |
1951 | int dev_close(struct net_device *dev); | |
1952 | void dev_disable_lro(struct net_device *dev); | |
1953 | int dev_loopback_xmit(struct sk_buff *newskb); | |
1954 | int dev_queue_xmit(struct sk_buff *skb); | |
f663dd9a | 1955 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
1956 | int register_netdevice(struct net_device *dev); |
1957 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
1958 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
1959 | static inline void unregister_netdevice(struct net_device *dev) |
1960 | { | |
1961 | unregister_netdevice_queue(dev, NULL); | |
1962 | } | |
1963 | ||
f629d208 JP |
1964 | int netdev_refcnt_read(const struct net_device *dev); |
1965 | void free_netdev(struct net_device *dev); | |
74d332c1 | 1966 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
1967 | void synchronize_net(void); |
1968 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 1969 | |
f629d208 JP |
1970 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1971 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
1972 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
1973 | int netdev_get_name(struct net *net, char *name, int ifindex); | |
1974 | int dev_restart(struct net_device *dev); | |
f629d208 | 1975 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
1976 | |
1977 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1978 | { | |
1979 | return NAPI_GRO_CB(skb)->data_offset; | |
1980 | } | |
1981 | ||
1982 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1983 | { | |
1984 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1985 | } | |
1986 | ||
1987 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1988 | { | |
1989 | NAPI_GRO_CB(skb)->data_offset += len; | |
1990 | } | |
1991 | ||
a5b1cf28 HX |
1992 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1993 | unsigned int offset) | |
86911732 | 1994 | { |
a5b1cf28 HX |
1995 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1996 | } | |
78a478d0 | 1997 | |
a5b1cf28 HX |
1998 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1999 | { | |
2000 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2001 | } | |
78a478d0 | 2002 | |
a5b1cf28 HX |
2003 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2004 | unsigned int offset) | |
2005 | { | |
17dd759c HX |
2006 | if (!pskb_may_pull(skb, hlen)) |
2007 | return NULL; | |
2008 | ||
a5b1cf28 HX |
2009 | NAPI_GRO_CB(skb)->frag0 = NULL; |
2010 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 2011 | return skb->data + offset; |
86911732 | 2012 | } |
1da177e4 | 2013 | |
aa4b9f53 HX |
2014 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
2015 | { | |
78d3fd0b | 2016 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
2017 | } |
2018 | ||
36e7b1b8 HX |
2019 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2020 | { | |
78d3fd0b HX |
2021 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2022 | skb_network_offset(skb); | |
36e7b1b8 HX |
2023 | } |
2024 | ||
bf5a755f JC |
2025 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2026 | const void *start, unsigned int len) | |
2027 | { | |
2028 | if (skb->ip_summed == CHECKSUM_COMPLETE) | |
2029 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, | |
2030 | csum_partial(start, len, 0)); | |
2031 | } | |
2032 | ||
0c4e8581 SH |
2033 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2034 | unsigned short type, | |
3b04ddde | 2035 | const void *daddr, const void *saddr, |
95c96174 | 2036 | unsigned int len) |
0c4e8581 | 2037 | { |
f1ecfd5d | 2038 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2039 | return 0; |
3b04ddde SH |
2040 | |
2041 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2042 | } |
2043 | ||
b95cce35 SH |
2044 | static inline int dev_parse_header(const struct sk_buff *skb, |
2045 | unsigned char *haddr) | |
2046 | { | |
2047 | const struct net_device *dev = skb->dev; | |
2048 | ||
1b83336b | 2049 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2050 | return 0; |
3b04ddde | 2051 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2052 | } |
2053 | ||
2205369a DM |
2054 | static inline int dev_rebuild_header(struct sk_buff *skb) |
2055 | { | |
2056 | const struct net_device *dev = skb->dev; | |
2057 | ||
2058 | if (!dev->header_ops || !dev->header_ops->rebuild) | |
2059 | return 0; | |
2060 | return dev->header_ops->rebuild(skb); | |
2061 | } | |
2062 | ||
1da177e4 | 2063 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
f629d208 | 2064 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2065 | static inline int unregister_gifconf(unsigned int family) |
2066 | { | |
2067 | return register_gifconf(family, NULL); | |
2068 | } | |
2069 | ||
99bbc707 | 2070 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2071 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2072 | struct sd_flow_limit { |
2073 | u64 count; | |
2074 | unsigned int num_buckets; | |
2075 | unsigned int history_head; | |
2076 | u16 history[FLOW_LIMIT_HISTORY]; | |
2077 | u8 buckets[]; | |
2078 | }; | |
2079 | ||
2080 | extern int netdev_flow_limit_table_len; | |
2081 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2082 | ||
1da177e4 | 2083 | /* |
88751275 | 2084 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 2085 | */ |
d94d9fee | 2086 | struct softnet_data { |
37437bb2 | 2087 | struct Qdisc *output_queue; |
a9cbd588 | 2088 | struct Qdisc **output_queue_tailp; |
1da177e4 | 2089 | struct list_head poll_list; |
1da177e4 | 2090 | struct sk_buff *completion_queue; |
6e7676c1 | 2091 | struct sk_buff_head process_queue; |
1da177e4 | 2092 | |
dee42870 | 2093 | /* stats */ |
cd7b5396 DM |
2094 | unsigned int processed; |
2095 | unsigned int time_squeeze; | |
2096 | unsigned int cpu_collision; | |
2097 | unsigned int received_rps; | |
dee42870 | 2098 | |
fd793d89 | 2099 | #ifdef CONFIG_RPS |
88751275 ED |
2100 | struct softnet_data *rps_ipi_list; |
2101 | ||
2102 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 2103 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
2104 | struct softnet_data *rps_ipi_next; |
2105 | unsigned int cpu; | |
fec5e652 | 2106 | unsigned int input_queue_head; |
76cc8b13 | 2107 | unsigned int input_queue_tail; |
1e94d72f | 2108 | #endif |
95c96174 | 2109 | unsigned int dropped; |
0a9627f2 | 2110 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2111 | struct napi_struct backlog; |
99bbc707 WB |
2112 | |
2113 | #ifdef CONFIG_NET_FLOW_LIMIT | |
5f121b9a | 2114 | struct sd_flow_limit __rcu *flow_limit; |
99bbc707 | 2115 | #endif |
1da177e4 LT |
2116 | }; |
2117 | ||
76cc8b13 | 2118 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2119 | { |
2120 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2121 | sd->input_queue_head++; |
2122 | #endif | |
2123 | } | |
2124 | ||
2125 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2126 | unsigned int *qtail) | |
2127 | { | |
2128 | #ifdef CONFIG_RPS | |
2129 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2130 | #endif |
2131 | } | |
2132 | ||
0a9627f2 | 2133 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2134 | |
f629d208 | 2135 | void __netif_schedule(struct Qdisc *q); |
1da177e4 | 2136 | |
86d804e1 | 2137 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 2138 | { |
73466498 | 2139 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
37437bb2 | 2140 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
2141 | } |
2142 | ||
fd2ea0a7 DM |
2143 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2144 | { | |
2145 | unsigned int i; | |
2146 | ||
2147 | for (i = 0; i < dev->num_tx_queues; i++) | |
2148 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2149 | } | |
2150 | ||
d29f749e DJ |
2151 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
2152 | { | |
73466498 | 2153 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2154 | } |
2155 | ||
bea3348e SH |
2156 | /** |
2157 | * netif_start_queue - allow transmit | |
2158 | * @dev: network device | |
2159 | * | |
2160 | * Allow upper layers to call the device hard_start_xmit routine. | |
2161 | */ | |
1da177e4 LT |
2162 | static inline void netif_start_queue(struct net_device *dev) |
2163 | { | |
e8a0464c | 2164 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2165 | } |
2166 | ||
fd2ea0a7 DM |
2167 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2168 | { | |
2169 | unsigned int i; | |
2170 | ||
2171 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2172 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2173 | netif_tx_start_queue(txq); | |
2174 | } | |
2175 | } | |
2176 | ||
79d16385 | 2177 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 | 2178 | { |
73466498 | 2179 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
37437bb2 | 2180 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
2181 | } |
2182 | ||
d29f749e DJ |
2183 | /** |
2184 | * netif_wake_queue - restart transmit | |
2185 | * @dev: network device | |
2186 | * | |
2187 | * Allow upper layers to call the device hard_start_xmit routine. | |
2188 | * Used for flow control when transmit resources are available. | |
2189 | */ | |
79d16385 DM |
2190 | static inline void netif_wake_queue(struct net_device *dev) |
2191 | { | |
e8a0464c | 2192 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2193 | } |
2194 | ||
fd2ea0a7 DM |
2195 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2196 | { | |
2197 | unsigned int i; | |
2198 | ||
2199 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2200 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2201 | netif_tx_wake_queue(txq); | |
2202 | } | |
2203 | } | |
2204 | ||
d29f749e DJ |
2205 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
2206 | { | |
18543a64 | 2207 | if (WARN_ON(!dev_queue)) { |
256ee435 | 2208 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
2209 | return; |
2210 | } | |
73466498 | 2211 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2212 | } |
2213 | ||
bea3348e SH |
2214 | /** |
2215 | * netif_stop_queue - stop transmitted packets | |
2216 | * @dev: network device | |
2217 | * | |
2218 | * Stop upper layers calling the device hard_start_xmit routine. | |
2219 | * Used for flow control when transmit resources are unavailable. | |
2220 | */ | |
1da177e4 LT |
2221 | static inline void netif_stop_queue(struct net_device *dev) |
2222 | { | |
e8a0464c | 2223 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2224 | } |
2225 | ||
fd2ea0a7 DM |
2226 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
2227 | { | |
2228 | unsigned int i; | |
2229 | ||
2230 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2231 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2232 | netif_tx_stop_queue(txq); | |
2233 | } | |
2234 | } | |
2235 | ||
4d29515f | 2236 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2237 | { |
73466498 | 2238 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2239 | } |
2240 | ||
bea3348e SH |
2241 | /** |
2242 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2243 | * @dev: network device | |
2244 | * | |
2245 | * Test if transmit queue on device is currently unable to send. | |
2246 | */ | |
4d29515f | 2247 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2248 | { |
e8a0464c | 2249 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2250 | } |
2251 | ||
4d29515f | 2252 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2253 | { |
73466498 TH |
2254 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2255 | } | |
2256 | ||
4d29515f | 2257 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
73466498 TH |
2258 | { |
2259 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2260 | } | |
2261 | ||
c5d67bd7 TH |
2262 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2263 | unsigned int bytes) | |
2264 | { | |
114cf580 TH |
2265 | #ifdef CONFIG_BQL |
2266 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2267 | |
2268 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2269 | return; | |
2270 | ||
2271 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2272 | ||
2273 | /* | |
2274 | * The XOFF flag must be set before checking the dql_avail below, | |
2275 | * because in netdev_tx_completed_queue we update the dql_completed | |
2276 | * before checking the XOFF flag. | |
2277 | */ | |
2278 | smp_mb(); | |
2279 | ||
2280 | /* check again in case another CPU has just made room avail */ | |
2281 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2282 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2283 | #endif |
c5d67bd7 TH |
2284 | } |
2285 | ||
0042d0c8 FF |
2286 | /** |
2287 | * netdev_sent_queue - report the number of bytes queued to hardware | |
2288 | * @dev: network device | |
2289 | * @bytes: number of bytes queued to the hardware device queue | |
2290 | * | |
2291 | * Report the number of bytes queued for sending/completion to the network | |
2292 | * device hardware queue. @bytes should be a good approximation and should | |
2293 | * exactly match netdev_completed_queue() @bytes | |
2294 | */ | |
c5d67bd7 TH |
2295 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2296 | { | |
2297 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2298 | } | |
2299 | ||
2300 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2301 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2302 | { |
114cf580 | 2303 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2304 | if (unlikely(!bytes)) |
2305 | return; | |
2306 | ||
2307 | dql_completed(&dev_queue->dql, bytes); | |
2308 | ||
2309 | /* | |
2310 | * Without the memory barrier there is a small possiblity that | |
2311 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2312 | * be stopped forever | |
2313 | */ | |
2314 | smp_mb(); | |
2315 | ||
2316 | if (dql_avail(&dev_queue->dql) < 0) | |
2317 | return; | |
2318 | ||
2319 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2320 | netif_schedule_queue(dev_queue); | |
114cf580 | 2321 | #endif |
c5d67bd7 TH |
2322 | } |
2323 | ||
0042d0c8 FF |
2324 | /** |
2325 | * netdev_completed_queue - report bytes and packets completed by device | |
2326 | * @dev: network device | |
2327 | * @pkts: actual number of packets sent over the medium | |
2328 | * @bytes: actual number of bytes sent over the medium | |
2329 | * | |
2330 | * Report the number of bytes and packets transmitted by the network device | |
2331 | * hardware queue over the physical medium, @bytes must exactly match the | |
2332 | * @bytes amount passed to netdev_sent_queue() | |
2333 | */ | |
c5d67bd7 | 2334 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 2335 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2336 | { |
2337 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2338 | } | |
2339 | ||
2340 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
2341 | { | |
114cf580 | 2342 | #ifdef CONFIG_BQL |
5c490354 | 2343 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
2344 | dql_reset(&q->dql); |
2345 | #endif | |
c5d67bd7 TH |
2346 | } |
2347 | ||
0042d0c8 FF |
2348 | /** |
2349 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
2350 | * @dev_queue: network device | |
2351 | * | |
2352 | * Reset the bytes and packet count of a network device and clear the | |
2353 | * software flow control OFF bit for this network device | |
2354 | */ | |
c5d67bd7 TH |
2355 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
2356 | { | |
2357 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
2358 | } |
2359 | ||
b9507bda DB |
2360 | /** |
2361 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
2362 | * @dev: network device | |
2363 | * @queue_index: given tx queue index | |
2364 | * | |
2365 | * Returns 0 if given tx queue index >= number of device tx queues, | |
2366 | * otherwise returns the originally passed tx queue index. | |
2367 | */ | |
2368 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
2369 | { | |
2370 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
2371 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
2372 | dev->name, queue_index, | |
2373 | dev->real_num_tx_queues); | |
2374 | return 0; | |
2375 | } | |
2376 | ||
2377 | return queue_index; | |
2378 | } | |
2379 | ||
bea3348e SH |
2380 | /** |
2381 | * netif_running - test if up | |
2382 | * @dev: network device | |
2383 | * | |
2384 | * Test if the device has been brought up. | |
2385 | */ | |
4d29515f | 2386 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
2387 | { |
2388 | return test_bit(__LINK_STATE_START, &dev->state); | |
2389 | } | |
2390 | ||
f25f4e44 PWJ |
2391 | /* |
2392 | * Routines to manage the subqueues on a device. We only need start | |
2393 | * stop, and a check if it's stopped. All other device management is | |
2394 | * done at the overall netdevice level. | |
2395 | * Also test the device if we're multiqueue. | |
2396 | */ | |
bea3348e SH |
2397 | |
2398 | /** | |
2399 | * netif_start_subqueue - allow sending packets on subqueue | |
2400 | * @dev: network device | |
2401 | * @queue_index: sub queue index | |
2402 | * | |
2403 | * Start individual transmit queue of a device with multiple transmit queues. | |
2404 | */ | |
f25f4e44 PWJ |
2405 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2406 | { | |
fd2ea0a7 | 2407 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2408 | |
2409 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
2410 | } |
2411 | ||
bea3348e SH |
2412 | /** |
2413 | * netif_stop_subqueue - stop sending packets on subqueue | |
2414 | * @dev: network device | |
2415 | * @queue_index: sub queue index | |
2416 | * | |
2417 | * Stop individual transmit queue of a device with multiple transmit queues. | |
2418 | */ | |
f25f4e44 PWJ |
2419 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2420 | { | |
fd2ea0a7 | 2421 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 2422 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
2423 | } |
2424 | ||
bea3348e SH |
2425 | /** |
2426 | * netif_subqueue_stopped - test status of subqueue | |
2427 | * @dev: network device | |
2428 | * @queue_index: sub queue index | |
2429 | * | |
2430 | * Check individual transmit queue of a device with multiple transmit queues. | |
2431 | */ | |
4d29515f DM |
2432 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2433 | u16 queue_index) | |
f25f4e44 | 2434 | { |
fd2ea0a7 | 2435 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2436 | |
2437 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
2438 | } |
2439 | ||
4d29515f DM |
2440 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2441 | struct sk_buff *skb) | |
668f895a PE |
2442 | { |
2443 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
2444 | } | |
bea3348e SH |
2445 | |
2446 | /** | |
2447 | * netif_wake_subqueue - allow sending packets on subqueue | |
2448 | * @dev: network device | |
2449 | * @queue_index: sub queue index | |
2450 | * | |
2451 | * Resume individual transmit queue of a device with multiple transmit queues. | |
2452 | */ | |
f25f4e44 PWJ |
2453 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
2454 | { | |
fd2ea0a7 | 2455 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
73466498 | 2456 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
37437bb2 | 2457 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
2458 | } |
2459 | ||
537c00de | 2460 | #ifdef CONFIG_XPS |
53af53ae | 2461 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 2462 | u16 index); |
537c00de AD |
2463 | #else |
2464 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 2465 | const struct cpumask *mask, |
537c00de AD |
2466 | u16 index) |
2467 | { | |
2468 | return 0; | |
2469 | } | |
2470 | #endif | |
2471 | ||
a3d22a68 VZ |
2472 | /* |
2473 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
2474 | * as a distribution range limit for the returned value. | |
2475 | */ | |
2476 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
2477 | const struct sk_buff *skb) | |
2478 | { | |
2479 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
2480 | } | |
2481 | ||
bea3348e SH |
2482 | /** |
2483 | * netif_is_multiqueue - test if device has multiple transmit queues | |
2484 | * @dev: network device | |
2485 | * | |
2486 | * Check if device has multiple transmit queues | |
bea3348e | 2487 | */ |
4d29515f | 2488 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 2489 | { |
a02cec21 | 2490 | return dev->num_tx_queues > 1; |
f25f4e44 | 2491 | } |
1da177e4 | 2492 | |
f629d208 | 2493 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 2494 | |
a953be53 | 2495 | #ifdef CONFIG_SYSFS |
f629d208 | 2496 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
2497 | #else |
2498 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
2499 | unsigned int rxq) | |
2500 | { | |
2501 | return 0; | |
2502 | } | |
2503 | #endif | |
2504 | ||
3171d026 BH |
2505 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
2506 | const struct net_device *from_dev) | |
2507 | { | |
ee6ae1a1 JP |
2508 | int err; |
2509 | ||
2510 | err = netif_set_real_num_tx_queues(to_dev, | |
2511 | from_dev->real_num_tx_queues); | |
2512 | if (err) | |
2513 | return err; | |
a953be53 | 2514 | #ifdef CONFIG_SYSFS |
3171d026 BH |
2515 | return netif_set_real_num_rx_queues(to_dev, |
2516 | from_dev->real_num_rx_queues); | |
2517 | #else | |
2518 | return 0; | |
2519 | #endif | |
2520 | } | |
2521 | ||
a953be53 MD |
2522 | #ifdef CONFIG_SYSFS |
2523 | static inline unsigned int get_netdev_rx_queue_index( | |
2524 | struct netdev_rx_queue *queue) | |
2525 | { | |
2526 | struct net_device *dev = queue->dev; | |
2527 | int index = queue - dev->_rx; | |
2528 | ||
2529 | BUG_ON(index >= dev->num_rx_queues); | |
2530 | return index; | |
2531 | } | |
2532 | #endif | |
2533 | ||
16917b87 | 2534 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 2535 | int netif_get_num_default_rss_queues(void); |
16917b87 | 2536 | |
e6247027 ED |
2537 | enum skb_free_reason { |
2538 | SKB_REASON_CONSUMED, | |
2539 | SKB_REASON_DROPPED, | |
2540 | }; | |
2541 | ||
2542 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
2543 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 2544 | |
e6247027 ED |
2545 | /* |
2546 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
2547 | * interrupt context or with hardware interrupts being disabled. | |
2548 | * (in_irq() || irqs_disabled()) | |
2549 | * | |
2550 | * We provide four helpers that can be used in following contexts : | |
2551 | * | |
2552 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
2553 | * replacing kfree_skb(skb) | |
2554 | * | |
2555 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
2556 | * Typically used in place of consume_skb(skb) in TX completion path | |
2557 | * | |
2558 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
2559 | * replacing kfree_skb(skb) | |
2560 | * | |
2561 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
2562 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 2563 | */ |
e6247027 ED |
2564 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
2565 | { | |
2566 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
2567 | } | |
2568 | ||
2569 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
2570 | { | |
2571 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
2572 | } | |
2573 | ||
2574 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
2575 | { | |
2576 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
2577 | } | |
2578 | ||
2579 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
2580 | { | |
2581 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
2582 | } | |
1da177e4 | 2583 | |
f629d208 JP |
2584 | int netif_rx(struct sk_buff *skb); |
2585 | int netif_rx_ni(struct sk_buff *skb); | |
2586 | int netif_receive_skb(struct sk_buff *skb); | |
2587 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); | |
2588 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
2589 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
2590 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
2591 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
2592 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
2593 | |
2594 | static inline void napi_free_frags(struct napi_struct *napi) | |
2595 | { | |
2596 | kfree_skb(napi->skb); | |
2597 | napi->skb = NULL; | |
2598 | } | |
2599 | ||
f629d208 JP |
2600 | int netdev_rx_handler_register(struct net_device *dev, |
2601 | rx_handler_func_t *rx_handler, | |
2602 | void *rx_handler_data); | |
2603 | void netdev_rx_handler_unregister(struct net_device *dev); | |
2604 | ||
2605 | bool dev_valid_name(const char *name); | |
2606 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
2607 | int dev_ethtool(struct net *net, struct ifreq *); | |
2608 | unsigned int dev_get_flags(const struct net_device *); | |
2609 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
2610 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
2611 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
2612 | unsigned int gchanges); | |
f629d208 JP |
2613 | int dev_change_name(struct net_device *, const char *); |
2614 | int dev_set_alias(struct net_device *, const char *, size_t); | |
2615 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); | |
2616 | int dev_set_mtu(struct net_device *, int); | |
2617 | void dev_set_group(struct net_device *, int); | |
2618 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
2619 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
2620 | int dev_get_phys_port_id(struct net_device *dev, | |
2621 | struct netdev_phys_port_id *ppid); | |
2622 | int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, | |
f663dd9a | 2623 | struct netdev_queue *txq); |
f629d208 | 2624 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
1ee481fb | 2625 | bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb); |
1da177e4 | 2626 | |
20380731 | 2627 | extern int netdev_budget; |
1da177e4 LT |
2628 | |
2629 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 2630 | void netdev_run_todo(void); |
1da177e4 | 2631 | |
bea3348e SH |
2632 | /** |
2633 | * dev_put - release reference to device | |
2634 | * @dev: network device | |
2635 | * | |
9ef4429b | 2636 | * Release reference to device to allow it to be freed. |
bea3348e | 2637 | */ |
1da177e4 LT |
2638 | static inline void dev_put(struct net_device *dev) |
2639 | { | |
933393f5 | 2640 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2641 | } |
2642 | ||
bea3348e SH |
2643 | /** |
2644 | * dev_hold - get reference to device | |
2645 | * @dev: network device | |
2646 | * | |
9ef4429b | 2647 | * Hold reference to device to keep it from being freed. |
bea3348e | 2648 | */ |
15333061 SH |
2649 | static inline void dev_hold(struct net_device *dev) |
2650 | { | |
933393f5 | 2651 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2652 | } |
1da177e4 LT |
2653 | |
2654 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2655 | * and _off may be called from IRQ context, but it is caller | |
2656 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2657 | * |
2658 | * The name carrier is inappropriate, these functions should really be | |
2659 | * called netif_lowerlayer_*() because they represent the state of any | |
2660 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2661 | */ |
2662 | ||
f629d208 JP |
2663 | void linkwatch_init_dev(struct net_device *dev); |
2664 | void linkwatch_fire_event(struct net_device *dev); | |
2665 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 2666 | |
bea3348e SH |
2667 | /** |
2668 | * netif_carrier_ok - test if carrier present | |
2669 | * @dev: network device | |
2670 | * | |
2671 | * Check if carrier is present on device | |
2672 | */ | |
4d29515f | 2673 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
2674 | { |
2675 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
2676 | } | |
2677 | ||
f629d208 | 2678 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 2679 | |
f629d208 | 2680 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 2681 | |
f629d208 | 2682 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 2683 | |
f629d208 | 2684 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 2685 | |
bea3348e SH |
2686 | /** |
2687 | * netif_dormant_on - mark device as dormant. | |
2688 | * @dev: network device | |
2689 | * | |
2690 | * Mark device as dormant (as per RFC2863). | |
2691 | * | |
2692 | * The dormant state indicates that the relevant interface is not | |
2693 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
2694 | * in a "pending" state, waiting for some external event. For "on- | |
2695 | * demand" interfaces, this new state identifies the situation where the | |
2696 | * interface is waiting for events to place it in the up state. | |
2697 | * | |
2698 | */ | |
b00055aa SR |
2699 | static inline void netif_dormant_on(struct net_device *dev) |
2700 | { | |
2701 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2702 | linkwatch_fire_event(dev); | |
2703 | } | |
2704 | ||
bea3348e SH |
2705 | /** |
2706 | * netif_dormant_off - set device as not dormant. | |
2707 | * @dev: network device | |
2708 | * | |
2709 | * Device is not in dormant state. | |
2710 | */ | |
b00055aa SR |
2711 | static inline void netif_dormant_off(struct net_device *dev) |
2712 | { | |
2713 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2714 | linkwatch_fire_event(dev); | |
2715 | } | |
2716 | ||
bea3348e SH |
2717 | /** |
2718 | * netif_dormant - test if carrier present | |
2719 | * @dev: network device | |
2720 | * | |
2721 | * Check if carrier is present on device | |
2722 | */ | |
4d29515f | 2723 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
2724 | { |
2725 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
2726 | } | |
2727 | ||
2728 | ||
bea3348e SH |
2729 | /** |
2730 | * netif_oper_up - test if device is operational | |
2731 | * @dev: network device | |
2732 | * | |
2733 | * Check if carrier is operational | |
2734 | */ | |
4d29515f | 2735 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 2736 | { |
b00055aa SR |
2737 | return (dev->operstate == IF_OPER_UP || |
2738 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
2739 | } | |
2740 | ||
bea3348e SH |
2741 | /** |
2742 | * netif_device_present - is device available or removed | |
2743 | * @dev: network device | |
2744 | * | |
2745 | * Check if device has not been removed from system. | |
2746 | */ | |
4d29515f | 2747 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
2748 | { |
2749 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
2750 | } | |
2751 | ||
f629d208 | 2752 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 2753 | |
f629d208 | 2754 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
2755 | |
2756 | /* | |
2757 | * Network interface message level settings | |
2758 | */ | |
1da177e4 LT |
2759 | |
2760 | enum { | |
2761 | NETIF_MSG_DRV = 0x0001, | |
2762 | NETIF_MSG_PROBE = 0x0002, | |
2763 | NETIF_MSG_LINK = 0x0004, | |
2764 | NETIF_MSG_TIMER = 0x0008, | |
2765 | NETIF_MSG_IFDOWN = 0x0010, | |
2766 | NETIF_MSG_IFUP = 0x0020, | |
2767 | NETIF_MSG_RX_ERR = 0x0040, | |
2768 | NETIF_MSG_TX_ERR = 0x0080, | |
2769 | NETIF_MSG_TX_QUEUED = 0x0100, | |
2770 | NETIF_MSG_INTR = 0x0200, | |
2771 | NETIF_MSG_TX_DONE = 0x0400, | |
2772 | NETIF_MSG_RX_STATUS = 0x0800, | |
2773 | NETIF_MSG_PKTDATA = 0x1000, | |
2774 | NETIF_MSG_HW = 0x2000, | |
2775 | NETIF_MSG_WOL = 0x4000, | |
2776 | }; | |
2777 | ||
2778 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
2779 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
2780 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
2781 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
2782 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
2783 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
2784 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
2785 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
2786 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
2787 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
2788 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
2789 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
2790 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
2791 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
2792 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
2793 | ||
2794 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
2795 | { | |
2796 | /* use default */ | |
2797 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
2798 | return default_msg_enable_bits; | |
2799 | if (debug_value == 0) /* no output */ | |
2800 | return 0; | |
2801 | /* set low N bits */ | |
2802 | return (1 << debug_value) - 1; | |
2803 | } | |
2804 | ||
c773e847 | 2805 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 2806 | { |
c773e847 DM |
2807 | spin_lock(&txq->_xmit_lock); |
2808 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
2809 | } |
2810 | ||
fd2ea0a7 DM |
2811 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2812 | { | |
2813 | spin_lock_bh(&txq->_xmit_lock); | |
2814 | txq->xmit_lock_owner = smp_processor_id(); | |
2815 | } | |
2816 | ||
4d29515f | 2817 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 2818 | { |
4d29515f | 2819 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
2820 | if (likely(ok)) |
2821 | txq->xmit_lock_owner = smp_processor_id(); | |
2822 | return ok; | |
2823 | } | |
2824 | ||
2825 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
2826 | { | |
2827 | txq->xmit_lock_owner = -1; | |
2828 | spin_unlock(&txq->_xmit_lock); | |
2829 | } | |
2830 | ||
2831 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
2832 | { | |
2833 | txq->xmit_lock_owner = -1; | |
2834 | spin_unlock_bh(&txq->_xmit_lock); | |
2835 | } | |
2836 | ||
08baf561 ED |
2837 | static inline void txq_trans_update(struct netdev_queue *txq) |
2838 | { | |
2839 | if (txq->xmit_lock_owner != -1) | |
2840 | txq->trans_start = jiffies; | |
2841 | } | |
2842 | ||
d29f749e DJ |
2843 | /** |
2844 | * netif_tx_lock - grab network device transmit lock | |
2845 | * @dev: network device | |
d29f749e DJ |
2846 | * |
2847 | * Get network device transmit lock | |
2848 | */ | |
22dd7495 JHS |
2849 | static inline void netif_tx_lock(struct net_device *dev) |
2850 | { | |
e8a0464c | 2851 | unsigned int i; |
c3f26a26 | 2852 | int cpu; |
c773e847 | 2853 | |
c3f26a26 DM |
2854 | spin_lock(&dev->tx_global_lock); |
2855 | cpu = smp_processor_id(); | |
e8a0464c DM |
2856 | for (i = 0; i < dev->num_tx_queues; i++) { |
2857 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2858 | |
2859 | /* We are the only thread of execution doing a | |
2860 | * freeze, but we have to grab the _xmit_lock in | |
2861 | * order to synchronize with threads which are in | |
2862 | * the ->hard_start_xmit() handler and already | |
2863 | * checked the frozen bit. | |
2864 | */ | |
e8a0464c | 2865 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
2866 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2867 | __netif_tx_unlock(txq); | |
e8a0464c | 2868 | } |
932ff279 HX |
2869 | } |
2870 | ||
2871 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
2872 | { | |
e8a0464c DM |
2873 | local_bh_disable(); |
2874 | netif_tx_lock(dev); | |
932ff279 HX |
2875 | } |
2876 | ||
932ff279 HX |
2877 | static inline void netif_tx_unlock(struct net_device *dev) |
2878 | { | |
e8a0464c DM |
2879 | unsigned int i; |
2880 | ||
2881 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2882 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2883 | |
c3f26a26 DM |
2884 | /* No need to grab the _xmit_lock here. If the |
2885 | * queue is not stopped for another reason, we | |
2886 | * force a schedule. | |
2887 | */ | |
2888 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2889 | netif_schedule_queue(txq); |
c3f26a26 DM |
2890 | } |
2891 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2892 | } |
2893 | ||
2894 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2895 | { | |
e8a0464c DM |
2896 | netif_tx_unlock(dev); |
2897 | local_bh_enable(); | |
932ff279 HX |
2898 | } |
2899 | ||
c773e847 | 2900 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2901 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2902 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2903 | } \ |
2904 | } | |
2905 | ||
5efeac44 EB |
2906 | #define HARD_TX_TRYLOCK(dev, txq) \ |
2907 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
2908 | __netif_tx_trylock(txq) : \ | |
2909 | true ) | |
2910 | ||
c773e847 | 2911 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2912 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2913 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2914 | } \ |
2915 | } | |
2916 | ||
1da177e4 LT |
2917 | static inline void netif_tx_disable(struct net_device *dev) |
2918 | { | |
fd2ea0a7 | 2919 | unsigned int i; |
c3f26a26 | 2920 | int cpu; |
fd2ea0a7 | 2921 | |
c3f26a26 DM |
2922 | local_bh_disable(); |
2923 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2924 | for (i = 0; i < dev->num_tx_queues; i++) { |
2925 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2926 | |
2927 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2928 | netif_tx_stop_queue(txq); |
c3f26a26 | 2929 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2930 | } |
c3f26a26 | 2931 | local_bh_enable(); |
1da177e4 LT |
2932 | } |
2933 | ||
e308a5d8 DM |
2934 | static inline void netif_addr_lock(struct net_device *dev) |
2935 | { | |
2936 | spin_lock(&dev->addr_list_lock); | |
2937 | } | |
2938 | ||
2429f7ac JP |
2939 | static inline void netif_addr_lock_nested(struct net_device *dev) |
2940 | { | |
2941 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); | |
2942 | } | |
2943 | ||
e308a5d8 DM |
2944 | static inline void netif_addr_lock_bh(struct net_device *dev) |
2945 | { | |
2946 | spin_lock_bh(&dev->addr_list_lock); | |
2947 | } | |
2948 | ||
2949 | static inline void netif_addr_unlock(struct net_device *dev) | |
2950 | { | |
2951 | spin_unlock(&dev->addr_list_lock); | |
2952 | } | |
2953 | ||
2954 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2955 | { | |
2956 | spin_unlock_bh(&dev->addr_list_lock); | |
2957 | } | |
2958 | ||
f001fde5 | 2959 | /* |
31278e71 | 2960 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2961 | * rcu_read_lock held. |
2962 | */ | |
2963 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2964 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2965 | |
1da177e4 LT |
2966 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2967 | ||
f629d208 | 2968 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
2969 | |
2970 | /* Support for loadable net-drivers */ | |
f629d208 JP |
2971 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
2972 | void (*setup)(struct net_device *), | |
2973 | unsigned int txqs, unsigned int rxqs); | |
f25f4e44 | 2974 | #define alloc_netdev(sizeof_priv, name, setup) \ |
36909ea4 TH |
2975 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2976 | ||
2977 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ | |
2978 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) | |
2979 | ||
f629d208 JP |
2980 | int register_netdev(struct net_device *dev); |
2981 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2982 | |
22bedad3 | 2983 | /* General hardware address lists handling functions */ |
f629d208 JP |
2984 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
2985 | struct netdev_hw_addr_list *from_list, int addr_len); | |
2986 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2987 | struct netdev_hw_addr_list *from_list, int addr_len); | |
f629d208 | 2988 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 2989 | |
f001fde5 | 2990 | /* Functions used for device addresses handling */ |
f629d208 JP |
2991 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
2992 | unsigned char addr_type); | |
2993 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
2994 | unsigned char addr_type); | |
f629d208 JP |
2995 | void dev_addr_flush(struct net_device *dev); |
2996 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
2997 | |
2998 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
2999 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3000 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3001 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3002 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3003 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3004 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3005 | void dev_uc_flush(struct net_device *dev); | |
3006 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3007 | |
22bedad3 | 3008 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3009 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3010 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3011 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3012 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3013 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3014 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3015 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3016 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3017 | void dev_mc_flush(struct net_device *dev); | |
3018 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3019 | |
4417da66 | 3020 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3021 | void dev_set_rx_mode(struct net_device *dev); |
3022 | void __dev_set_rx_mode(struct net_device *dev); | |
3023 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3024 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3025 | void netdev_state_change(struct net_device *dev); | |
3026 | void netdev_notify_peers(struct net_device *dev); | |
3027 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3028 | /* Load a device via the kmod */ |
f629d208 JP |
3029 | void dev_load(struct net *net, const char *name); |
3030 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3031 | struct rtnl_link_stats64 *storage); | |
3032 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3033 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3034 | |
1da177e4 | 3035 | extern int netdev_max_backlog; |
3b098e2d | 3036 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3037 | extern int weight_p; |
0a14842f | 3038 | extern int bpf_jit_enable; |
9ff162a8 | 3039 | |
f629d208 | 3040 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
f629d208 JP |
3041 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3042 | struct list_head **iter); | |
8b5be856 VF |
3043 | |
3044 | /* iterate through upper list, must be called under RCU read lock */ | |
2f268f12 VF |
3045 | #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
3046 | for (iter = &(dev)->all_adj_list.upper, \ | |
3047 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3048 | updev; \ | |
3049 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) | |
8b5be856 | 3050 | |
f629d208 JP |
3051 | void *netdev_lower_get_next_private(struct net_device *dev, |
3052 | struct list_head **iter); | |
3053 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3054 | struct list_head **iter); | |
31088a11 VF |
3055 | |
3056 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3057 | for (iter = (dev)->adj_list.lower.next, \ | |
3058 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3059 | priv; \ | |
3060 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3061 | ||
3062 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3063 | for (iter = &(dev)->adj_list.lower, \ | |
3064 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3065 | priv; \ | |
3066 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3067 | ||
f629d208 | 3068 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3069 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3070 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3071 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
3072 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); | |
3073 | int netdev_master_upper_dev_link(struct net_device *dev, | |
9ff162a8 | 3074 | struct net_device *upper_dev); |
f629d208 JP |
3075 | int netdev_master_upper_dev_link_private(struct net_device *dev, |
3076 | struct net_device *upper_dev, | |
3077 | void *private); | |
3078 | void netdev_upper_dev_unlink(struct net_device *dev, | |
3079 | struct net_device *upper_dev); | |
5bb025fa | 3080 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
3081 | void *netdev_lower_dev_get_private(struct net_device *dev, |
3082 | struct net_device *lower_dev); | |
3083 | int skb_checksum_help(struct sk_buff *skb); | |
3084 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, | |
3085 | netdev_features_t features, bool tx_path); | |
3086 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
3087 | netdev_features_t features); | |
12b0004d CW |
3088 | |
3089 | static inline | |
3090 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
3091 | { | |
3092 | return __skb_gso_segment(skb, features, true); | |
3093 | } | |
53d6471c | 3094 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
3095 | |
3096 | static inline bool can_checksum_protocol(netdev_features_t features, | |
3097 | __be16 protocol) | |
3098 | { | |
3099 | return ((features & NETIF_F_GEN_CSUM) || | |
3100 | ((features & NETIF_F_V4_CSUM) && | |
3101 | protocol == htons(ETH_P_IP)) || | |
3102 | ((features & NETIF_F_V6_CSUM) && | |
3103 | protocol == htons(ETH_P_IPV6)) || | |
3104 | ((features & NETIF_F_FCOE_CRC) && | |
3105 | protocol == htons(ETH_P_FCOE))); | |
3106 | } | |
12b0004d | 3107 | |
fb286bb2 | 3108 | #ifdef CONFIG_BUG |
f629d208 | 3109 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
3110 | #else |
3111 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
3112 | { | |
3113 | } | |
3114 | #endif | |
1da177e4 | 3115 | /* rx skb timestamps */ |
f629d208 JP |
3116 | void net_enable_timestamp(void); |
3117 | void net_disable_timestamp(void); | |
1da177e4 | 3118 | |
20380731 | 3119 | #ifdef CONFIG_PROC_FS |
f629d208 | 3120 | int __init dev_proc_init(void); |
900ff8c6 CW |
3121 | #else |
3122 | #define dev_proc_init() 0 | |
20380731 ACM |
3123 | #endif |
3124 | ||
42a2d923 LT |
3125 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
3126 | const void *ns); | |
3127 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, | |
3128 | const void *ns); | |
58292cbe TH |
3129 | |
3130 | static inline int netdev_class_create_file(struct class_attribute *class_attr) | |
3131 | { | |
3132 | return netdev_class_create_file_ns(class_attr, NULL); | |
3133 | } | |
3134 | ||
3135 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) | |
3136 | { | |
3137 | netdev_class_remove_file_ns(class_attr, NULL); | |
3138 | } | |
b8a9787e | 3139 | |
04600794 JB |
3140 | extern struct kobj_ns_type_operations net_ns_type_operations; |
3141 | ||
f629d208 | 3142 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 3143 | |
f629d208 | 3144 | void linkwatch_run_queue(void); |
20380731 | 3145 | |
c8f44aff MM |
3146 | static inline netdev_features_t netdev_get_wanted_features( |
3147 | struct net_device *dev) | |
5455c699 MM |
3148 | { |
3149 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
3150 | } | |
c8f44aff MM |
3151 | netdev_features_t netdev_increment_features(netdev_features_t all, |
3152 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
3153 | |
3154 | /* Allow TSO being used on stacked device : | |
3155 | * Performing the GSO segmentation before last device | |
3156 | * is a performance improvement. | |
3157 | */ | |
3158 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
3159 | netdev_features_t mask) | |
3160 | { | |
3161 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
3162 | } | |
3163 | ||
6cb6a27c | 3164 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 3165 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 3166 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 3167 | |
fc4a7489 PM |
3168 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
3169 | struct net_device *dev); | |
3170 | ||
d2069403 FW |
3171 | netdev_features_t netif_skb_dev_features(struct sk_buff *skb, |
3172 | const struct net_device *dev); | |
3173 | static inline netdev_features_t netif_skb_features(struct sk_buff *skb) | |
3174 | { | |
3175 | return netif_skb_dev_features(skb, skb->dev); | |
3176 | } | |
58e998c6 | 3177 | |
4d29515f | 3178 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 3179 | { |
c8f44aff | 3180 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
3181 | |
3182 | /* check flags correspondence */ | |
3183 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
3184 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
3185 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
3186 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
3187 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
3188 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
3189 | ||
d6b4991a | 3190 | return (features & feature) == feature; |
576a30eb HX |
3191 | } |
3192 | ||
4d29515f | 3193 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 3194 | { |
278b2513 | 3195 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 3196 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
3197 | } |
3198 | ||
4d29515f DM |
3199 | static inline bool netif_needs_gso(struct sk_buff *skb, |
3200 | netdev_features_t features) | |
7967168c | 3201 | { |
fc741216 | 3202 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
3203 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
3204 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
3205 | } |
3206 | ||
82cc1a7a PWJ |
3207 | static inline void netif_set_gso_max_size(struct net_device *dev, |
3208 | unsigned int size) | |
3209 | { | |
3210 | dev->gso_max_size = size; | |
3211 | } | |
3212 | ||
7a7ffbab WCC |
3213 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
3214 | int pulled_hlen, u16 mac_offset, | |
3215 | int mac_len) | |
3216 | { | |
3217 | skb->protocol = protocol; | |
3218 | skb->encapsulation = 1; | |
3219 | skb_push(skb, pulled_hlen); | |
3220 | skb_reset_transport_header(skb); | |
3221 | skb->mac_header = mac_offset; | |
3222 | skb->network_header = skb->mac_header + mac_len; | |
3223 | skb->mac_len = mac_len; | |
3224 | } | |
3225 | ||
a6cc0cfa JF |
3226 | static inline bool netif_is_macvlan(struct net_device *dev) |
3227 | { | |
3228 | return dev->priv_flags & IFF_MACVLAN; | |
3229 | } | |
3230 | ||
8a7fbfab | 3231 | static inline bool netif_is_bond_master(struct net_device *dev) |
3232 | { | |
3233 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
3234 | } | |
3235 | ||
4d29515f | 3236 | static inline bool netif_is_bond_slave(struct net_device *dev) |
1765a575 JP |
3237 | { |
3238 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
3239 | } | |
3240 | ||
3bdc0eba BG |
3241 | static inline bool netif_supports_nofcs(struct net_device *dev) |
3242 | { | |
3243 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
3244 | } | |
3245 | ||
505d4f73 | 3246 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 3247 | |
571ba423 JP |
3248 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
3249 | ||
3250 | /* netdev_printk helpers, similar to dev_printk */ | |
3251 | ||
3252 | static inline const char *netdev_name(const struct net_device *dev) | |
3253 | { | |
3254 | if (dev->reg_state != NETREG_REGISTERED) | |
3255 | return "(unregistered net_device)"; | |
3256 | return dev->name; | |
3257 | } | |
3258 | ||
f629d208 | 3259 | __printf(3, 4) |
b9075fa9 JP |
3260 | int netdev_printk(const char *level, const struct net_device *dev, |
3261 | const char *format, ...); | |
f629d208 | 3262 | __printf(2, 3) |
b9075fa9 | 3263 | int netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 3264 | __printf(2, 3) |
b9075fa9 | 3265 | int netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 3266 | __printf(2, 3) |
b9075fa9 | 3267 | int netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 3268 | __printf(2, 3) |
b9075fa9 | 3269 | int netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 3270 | __printf(2, 3) |
b9075fa9 | 3271 | int netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 3272 | __printf(2, 3) |
b9075fa9 | 3273 | int netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 3274 | __printf(2, 3) |
b9075fa9 | 3275 | int netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 3276 | |
8909c9ad VK |
3277 | #define MODULE_ALIAS_NETDEV(device) \ |
3278 | MODULE_ALIAS("netdev-" device) | |
3279 | ||
b558c96f | 3280 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
3281 | #define netdev_dbg(__dev, format, args...) \ |
3282 | do { \ | |
ffa10cb4 | 3283 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 3284 | } while (0) |
b558c96f JC |
3285 | #elif defined(DEBUG) |
3286 | #define netdev_dbg(__dev, format, args...) \ | |
3287 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
3288 | #else |
3289 | #define netdev_dbg(__dev, format, args...) \ | |
3290 | ({ \ | |
3291 | if (0) \ | |
3292 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
3293 | 0; \ | |
3294 | }) | |
3295 | #endif | |
3296 | ||
3297 | #if defined(VERBOSE_DEBUG) | |
3298 | #define netdev_vdbg netdev_dbg | |
3299 | #else | |
3300 | ||
3301 | #define netdev_vdbg(dev, format, args...) \ | |
3302 | ({ \ | |
3303 | if (0) \ | |
3304 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
3305 | 0; \ | |
3306 | }) | |
3307 | #endif | |
3308 | ||
3309 | /* | |
3310 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
3311 | * of using a WARN/WARN_ON to get the message out, including the | |
3312 | * file/line information and a backtrace. | |
3313 | */ | |
3314 | #define netdev_WARN(dev, format, args...) \ | |
7cc7c5e5 | 3315 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args) |
571ba423 | 3316 | |
b3d95c5c JP |
3317 | /* netif printk helpers, similar to netdev_printk */ |
3318 | ||
3319 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
3320 | do { \ | |
3321 | if (netif_msg_##type(priv)) \ | |
3322 | netdev_printk(level, (dev), fmt, ##args); \ | |
3323 | } while (0) | |
3324 | ||
f45f4321 JP |
3325 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
3326 | do { \ | |
3327 | if (netif_msg_##type(priv)) \ | |
3328 | netdev_##level(dev, fmt, ##args); \ | |
3329 | } while (0) | |
3330 | ||
b3d95c5c | 3331 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 3332 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 3333 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 3334 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 3335 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 3336 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 3337 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 3338 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 3339 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 3340 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 3341 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 3342 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 3343 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 3344 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 3345 | |
0053ea9c | 3346 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
3347 | #define netif_dbg(priv, type, netdev, format, args...) \ |
3348 | do { \ | |
3349 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 3350 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 3351 | } while (0) |
0053ea9c JP |
3352 | #elif defined(DEBUG) |
3353 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3354 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
3355 | #else |
3356 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3357 | ({ \ | |
3358 | if (0) \ | |
3359 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
3360 | 0; \ | |
3361 | }) | |
3362 | #endif | |
3363 | ||
3364 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 3365 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
3366 | #else |
3367 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
3368 | ({ \ | |
3369 | if (0) \ | |
a4ed89cb | 3370 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
3371 | 0; \ |
3372 | }) | |
3373 | #endif | |
571ba423 | 3374 | |
900ff8c6 CW |
3375 | /* |
3376 | * The list of packet types we will receive (as opposed to discard) | |
3377 | * and the routines to invoke. | |
3378 | * | |
3379 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
3380 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
3381 | * | |
3382 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
3383 | * sure which should go first, but I bet it won't make much | |
3384 | * difference if we are running VLANs. The good news is that | |
3385 | * this protocol won't be in the list unless compiled in, so | |
3386 | * the average user (w/out VLANs) will not be adversely affected. | |
3387 | * --BLG | |
3388 | * | |
3389 | * 0800 IP | |
3390 | * 8100 802.1Q VLAN | |
3391 | * 0001 802.3 | |
3392 | * 0002 AX.25 | |
3393 | * 0004 802.2 | |
3394 | * 8035 RARP | |
3395 | * 0005 SNAP | |
3396 | * 0805 X.25 | |
3397 | * 0806 ARP | |
3398 | * 8137 IPX | |
3399 | * 0009 Localtalk | |
3400 | * 86DD IPv6 | |
3401 | */ | |
3402 | #define PTYPE_HASH_SIZE (16) | |
3403 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
3404 | ||
385a154c | 3405 | #endif /* _LINUX_NETDEVICE_H */ |