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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> |
53511453 | 33 | #include <linux/prefetch.h> |
1da177e4 LT |
34 | #include <asm/cache.h> |
35 | #include <asm/byteorder.h> | |
36 | ||
1da177e4 | 37 | #include <linux/percpu.h> |
4d5b78c0 | 38 | #include <linux/rculist.h> |
db217334 | 39 | #include <linux/dmaengine.h> |
bea3348e | 40 | #include <linux/workqueue.h> |
114cf580 | 41 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 42 | |
b1b67dd4 | 43 | #include <linux/ethtool.h> |
a050c33f | 44 | #include <net/net_namespace.h> |
cf85d08f | 45 | #include <net/dsa.h> |
7a6b6f51 | 46 | #ifdef CONFIG_DCB |
2f90b865 AD |
47 | #include <net/dcbnl.h> |
48 | #endif | |
5bc1421e | 49 | #include <net/netprio_cgroup.h> |
a050c33f | 50 | |
a59e2ecb | 51 | #include <linux/netdev_features.h> |
77162022 | 52 | #include <linux/neighbour.h> |
607ca46e | 53 | #include <uapi/linux/netdevice.h> |
61bd3857 | 54 | #include <uapi/linux/if_bonding.h> |
a59e2ecb | 55 | |
115c1d6e | 56 | struct netpoll_info; |
313162d0 | 57 | struct device; |
c1f19b51 | 58 | struct phy_device; |
704232c2 JB |
59 | /* 802.11 specific */ |
60 | struct wireless_dev; | |
98a18b6f AA |
61 | /* 802.15.4 specific */ |
62 | struct wpan_dev; | |
1da177e4 | 63 | |
f629d208 JP |
64 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
65 | const struct ethtool_ops *ops); | |
d07d7507 | 66 | |
9a1654ba JP |
67 | /* Backlog congestion levels */ |
68 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
69 | #define NET_RX_DROP 1 /* packet dropped */ | |
70 | ||
572a9d7b PM |
71 | /* |
72 | * Transmit return codes: transmit return codes originate from three different | |
73 | * namespaces: | |
74 | * | |
75 | * - qdisc return codes | |
76 | * - driver transmit return codes | |
77 | * - errno values | |
78 | * | |
79 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
80 | * function. Real network devices commonly used with qdiscs should only return | |
81 | * the driver transmit return codes though - when qdiscs are used, the actual | |
82 | * transmission happens asynchronously, so the value is not propagated to | |
83 | * higher layers. Virtual network devices transmit synchronously, in this case | |
84 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
85 | * others are propagated to higher layers. | |
86 | */ | |
87 | ||
88 | /* qdisc ->enqueue() return codes. */ | |
89 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
90 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
91 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
92 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
93 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 94 | |
b9df3cb8 GR |
95 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
96 | * indicates that the device will soon be dropping packets, or already drops | |
97 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 98 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
99 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
100 | ||
dc1f8bf6 | 101 | /* Driver transmit return codes */ |
9a1654ba | 102 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 103 | |
dc1f8bf6 | 104 | enum netdev_tx { |
572a9d7b | 105 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
106 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
107 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
108 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
109 | }; |
110 | typedef enum netdev_tx netdev_tx_t; | |
111 | ||
9a1654ba JP |
112 | /* |
113 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
114 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
115 | */ | |
116 | static inline bool dev_xmit_complete(int rc) | |
117 | { | |
118 | /* | |
119 | * Positive cases with an skb consumed by a driver: | |
120 | * - successful transmission (rc == NETDEV_TX_OK) | |
121 | * - error while transmitting (rc < 0) | |
122 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
123 | */ | |
124 | if (likely(rc < NET_XMIT_MASK)) | |
125 | return true; | |
126 | ||
127 | return false; | |
128 | } | |
129 | ||
1da177e4 LT |
130 | /* |
131 | * Compute the worst case header length according to the protocols | |
132 | * used. | |
133 | */ | |
fe2918b0 | 134 | |
d11ead75 | 135 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
8388e3da DM |
136 | # if defined(CONFIG_MAC80211_MESH) |
137 | # define LL_MAX_HEADER 128 | |
138 | # else | |
139 | # define LL_MAX_HEADER 96 | |
140 | # endif | |
1da177e4 | 141 | #else |
8388e3da | 142 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
143 | #endif |
144 | ||
d11ead75 BH |
145 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
146 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
147 | #define MAX_HEADER LL_MAX_HEADER |
148 | #else | |
149 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
150 | #endif | |
151 | ||
152 | /* | |
be1f3c2c BH |
153 | * Old network device statistics. Fields are native words |
154 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 155 | */ |
fe2918b0 | 156 | |
d94d9fee | 157 | struct net_device_stats { |
3cfde79c BH |
158 | unsigned long rx_packets; |
159 | unsigned long tx_packets; | |
160 | unsigned long rx_bytes; | |
161 | unsigned long tx_bytes; | |
162 | unsigned long rx_errors; | |
163 | unsigned long tx_errors; | |
164 | unsigned long rx_dropped; | |
165 | unsigned long tx_dropped; | |
166 | unsigned long multicast; | |
1da177e4 | 167 | unsigned long collisions; |
1da177e4 | 168 | unsigned long rx_length_errors; |
3cfde79c BH |
169 | unsigned long rx_over_errors; |
170 | unsigned long rx_crc_errors; | |
171 | unsigned long rx_frame_errors; | |
172 | unsigned long rx_fifo_errors; | |
173 | unsigned long rx_missed_errors; | |
1da177e4 LT |
174 | unsigned long tx_aborted_errors; |
175 | unsigned long tx_carrier_errors; | |
176 | unsigned long tx_fifo_errors; | |
177 | unsigned long tx_heartbeat_errors; | |
178 | unsigned long tx_window_errors; | |
1da177e4 LT |
179 | unsigned long rx_compressed; |
180 | unsigned long tx_compressed; | |
181 | }; | |
182 | ||
1da177e4 LT |
183 | |
184 | #include <linux/cache.h> | |
185 | #include <linux/skbuff.h> | |
186 | ||
adc9300e | 187 | #ifdef CONFIG_RPS |
c5905afb IM |
188 | #include <linux/static_key.h> |
189 | extern struct static_key rps_needed; | |
adc9300e ED |
190 | #endif |
191 | ||
1da177e4 LT |
192 | struct neighbour; |
193 | struct neigh_parms; | |
194 | struct sk_buff; | |
195 | ||
f001fde5 JP |
196 | struct netdev_hw_addr { |
197 | struct list_head list; | |
198 | unsigned char addr[MAX_ADDR_LEN]; | |
199 | unsigned char type; | |
ccffad25 JP |
200 | #define NETDEV_HW_ADDR_T_LAN 1 |
201 | #define NETDEV_HW_ADDR_T_SAN 2 | |
202 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
203 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 204 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 205 | bool global_use; |
4cd729b0 | 206 | int sync_cnt; |
8f8f103d | 207 | int refcount; |
4543fbef | 208 | int synced; |
f001fde5 JP |
209 | struct rcu_head rcu_head; |
210 | }; | |
211 | ||
31278e71 JP |
212 | struct netdev_hw_addr_list { |
213 | struct list_head list; | |
214 | int count; | |
215 | }; | |
216 | ||
22bedad3 JP |
217 | #define netdev_hw_addr_list_count(l) ((l)->count) |
218 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
219 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
220 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 221 | |
22bedad3 JP |
222 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
223 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
224 | #define netdev_for_each_uc_addr(ha, dev) \ | |
225 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 226 | |
22bedad3 JP |
227 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
228 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 229 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 230 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 231 | |
d94d9fee | 232 | struct hh_cache { |
f6b72b62 | 233 | u16 hh_len; |
5c25f686 | 234 | u16 __pad; |
3644f0ce | 235 | seqlock_t hh_lock; |
1da177e4 LT |
236 | |
237 | /* cached hardware header; allow for machine alignment needs. */ | |
238 | #define HH_DATA_MOD 16 | |
239 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 240 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
241 | #define HH_DATA_ALIGN(__len) \ |
242 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
243 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
244 | }; | |
245 | ||
246 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
247 | * Alternative is: | |
248 | * dev->hard_header_len ? (dev->hard_header_len + | |
249 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
250 | * | |
251 | * We could use other alignment values, but we must maintain the | |
252 | * relationship HH alignment <= LL alignment. | |
253 | */ | |
254 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 255 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 256 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 257 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 258 | |
3b04ddde SH |
259 | struct header_ops { |
260 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
261 | unsigned short type, const void *daddr, | |
95c96174 | 262 | const void *saddr, unsigned int len); |
3b04ddde | 263 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
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; |
3b47d303 | 319 | struct hrtimer timer; |
404f7c9e | 320 | struct list_head dev_list; |
af12fa6e ET |
321 | struct hlist_node napi_hash_node; |
322 | unsigned int napi_id; | |
bea3348e SH |
323 | }; |
324 | ||
d94d9fee | 325 | enum { |
bea3348e | 326 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 327 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 328 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
af12fa6e | 329 | NAPI_STATE_HASHED, /* In NAPI hash */ |
bea3348e SH |
330 | }; |
331 | ||
5b252f0c | 332 | enum gro_result { |
d1c76af9 HX |
333 | GRO_MERGED, |
334 | GRO_MERGED_FREE, | |
335 | GRO_HELD, | |
336 | GRO_NORMAL, | |
337 | GRO_DROP, | |
338 | }; | |
5b252f0c | 339 | typedef enum gro_result gro_result_t; |
d1c76af9 | 340 | |
8a4eb573 JP |
341 | /* |
342 | * enum rx_handler_result - Possible return values for rx_handlers. | |
343 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
344 | * further. | |
345 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
346 | * case skb->dev was changed by rx_handler. | |
347 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
348 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
349 | * | |
350 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
351 | * special processing of the skb, prior to delivery to protocol handlers. | |
352 | * | |
353 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
354 | * to register a second rx_handler will return -EBUSY. | |
355 | * | |
356 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
357 | * To unregister a rx_handler on a net_device, use | |
358 | * netdev_rx_handler_unregister(). | |
359 | * | |
360 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
361 | * do with the skb. | |
362 | * | |
363 | * If the rx_handler consumed to skb in some way, it should return | |
364 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
365 | * the skb to be delivered in some other ways. | |
366 | * | |
367 | * If the rx_handler changed skb->dev, to divert the skb to another | |
368 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
369 | * new device will be called if it exists. | |
370 | * | |
371 | * If the rx_handler consider the skb should be ignored, it should return | |
372 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
d93cf068 | 373 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 JP |
374 | * |
375 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
376 | * delivered, it should return RX_HANDLER_PASS. | |
377 | * | |
378 | * A device without a registered rx_handler will behave as if rx_handler | |
379 | * returned RX_HANDLER_PASS. | |
380 | */ | |
381 | ||
382 | enum rx_handler_result { | |
383 | RX_HANDLER_CONSUMED, | |
384 | RX_HANDLER_ANOTHER, | |
385 | RX_HANDLER_EXACT, | |
386 | RX_HANDLER_PASS, | |
387 | }; | |
388 | typedef enum rx_handler_result rx_handler_result_t; | |
389 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 390 | |
f629d208 | 391 | void __napi_schedule(struct napi_struct *n); |
bc9ad166 | 392 | void __napi_schedule_irqoff(struct napi_struct *n); |
bea3348e | 393 | |
4d29515f | 394 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
395 | { |
396 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
397 | } | |
398 | ||
bea3348e SH |
399 | /** |
400 | * napi_schedule_prep - check if napi can be scheduled | |
401 | * @n: napi context | |
402 | * | |
403 | * Test if NAPI routine is already running, and if not mark | |
404 | * it as running. This is used as a condition variable | |
a0a46196 DM |
405 | * insure only one NAPI poll instance runs. We also make |
406 | * sure there is no pending NAPI disable. | |
bea3348e | 407 | */ |
4d29515f | 408 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 409 | { |
a0a46196 DM |
410 | return !napi_disable_pending(n) && |
411 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
412 | } |
413 | ||
414 | /** | |
415 | * napi_schedule - schedule NAPI poll | |
416 | * @n: napi context | |
417 | * | |
418 | * Schedule NAPI poll routine to be called if it is not already | |
419 | * running. | |
420 | */ | |
421 | static inline void napi_schedule(struct napi_struct *n) | |
422 | { | |
423 | if (napi_schedule_prep(n)) | |
424 | __napi_schedule(n); | |
425 | } | |
426 | ||
bc9ad166 ED |
427 | /** |
428 | * napi_schedule_irqoff - schedule NAPI poll | |
429 | * @n: napi context | |
430 | * | |
431 | * Variant of napi_schedule(), assuming hard irqs are masked. | |
432 | */ | |
433 | static inline void napi_schedule_irqoff(struct napi_struct *n) | |
434 | { | |
435 | if (napi_schedule_prep(n)) | |
436 | __napi_schedule_irqoff(n); | |
437 | } | |
438 | ||
bfe13f54 | 439 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 440 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
441 | { |
442 | if (napi_schedule_prep(napi)) { | |
443 | __napi_schedule(napi); | |
4d29515f | 444 | return true; |
bfe13f54 | 445 | } |
4d29515f | 446 | return false; |
bfe13f54 RD |
447 | } |
448 | ||
3b47d303 ED |
449 | void __napi_complete(struct napi_struct *n); |
450 | void napi_complete_done(struct napi_struct *n, int work_done); | |
bea3348e SH |
451 | /** |
452 | * napi_complete - NAPI processing complete | |
453 | * @n: napi context | |
454 | * | |
455 | * Mark NAPI processing as complete. | |
3b47d303 | 456 | * Consider using napi_complete_done() instead. |
bea3348e | 457 | */ |
3b47d303 ED |
458 | static inline void napi_complete(struct napi_struct *n) |
459 | { | |
460 | return napi_complete_done(n, 0); | |
461 | } | |
bea3348e | 462 | |
af12fa6e ET |
463 | /** |
464 | * napi_by_id - lookup a NAPI by napi_id | |
465 | * @napi_id: hashed napi_id | |
466 | * | |
467 | * lookup @napi_id in napi_hash table | |
468 | * must be called under rcu_read_lock() | |
469 | */ | |
f629d208 | 470 | struct napi_struct *napi_by_id(unsigned int napi_id); |
af12fa6e ET |
471 | |
472 | /** | |
473 | * napi_hash_add - add a NAPI to global hashtable | |
474 | * @napi: napi context | |
475 | * | |
476 | * generate a new napi_id and store a @napi under it in napi_hash | |
477 | */ | |
f629d208 | 478 | void napi_hash_add(struct napi_struct *napi); |
af12fa6e ET |
479 | |
480 | /** | |
481 | * napi_hash_del - remove a NAPI from global table | |
482 | * @napi: napi context | |
483 | * | |
484 | * Warning: caller must observe rcu grace period | |
485 | * before freeing memory containing @napi | |
486 | */ | |
f629d208 | 487 | void napi_hash_del(struct napi_struct *napi); |
af12fa6e | 488 | |
bea3348e SH |
489 | /** |
490 | * napi_disable - prevent NAPI from scheduling | |
491 | * @n: napi context | |
492 | * | |
493 | * Stop NAPI from being scheduled on this context. | |
494 | * Waits till any outstanding processing completes. | |
495 | */ | |
3b47d303 | 496 | void napi_disable(struct napi_struct *n); |
bea3348e SH |
497 | |
498 | /** | |
499 | * napi_enable - enable NAPI scheduling | |
500 | * @n: napi context | |
501 | * | |
502 | * Resume NAPI from being scheduled on this context. | |
503 | * Must be paired with napi_disable. | |
504 | */ | |
505 | static inline void napi_enable(struct napi_struct *n) | |
506 | { | |
507 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
4e857c58 | 508 | smp_mb__before_atomic(); |
bea3348e SH |
509 | clear_bit(NAPI_STATE_SCHED, &n->state); |
510 | } | |
511 | ||
c264c3de SH |
512 | #ifdef CONFIG_SMP |
513 | /** | |
514 | * napi_synchronize - wait until NAPI is not running | |
515 | * @n: napi context | |
516 | * | |
517 | * Wait until NAPI is done being scheduled on this context. | |
518 | * Waits till any outstanding processing completes but | |
519 | * does not disable future activations. | |
520 | */ | |
521 | static inline void napi_synchronize(const struct napi_struct *n) | |
522 | { | |
523 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
524 | msleep(1); | |
525 | } | |
526 | #else | |
527 | # define napi_synchronize(n) barrier() | |
528 | #endif | |
529 | ||
d94d9fee | 530 | enum netdev_queue_state_t { |
73466498 TH |
531 | __QUEUE_STATE_DRV_XOFF, |
532 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 533 | __QUEUE_STATE_FROZEN, |
79d16385 | 534 | }; |
8e2f1a63 DB |
535 | |
536 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
537 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
538 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
539 | ||
540 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
541 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
542 | QUEUE_STATE_FROZEN) | |
543 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
544 | QUEUE_STATE_FROZEN) | |
545 | ||
73466498 TH |
546 | /* |
547 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
548 | * netif_tx_* functions below are used to manipulate this flag. The | |
549 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
550 | * queue independently. The netif_xmit_*stopped functions below are called | |
551 | * to check if the queue has been stopped by the driver or stack (either | |
552 | * of the XOFF bits are set in the state). Drivers should not need to call | |
553 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
554 | */ | |
79d16385 | 555 | |
bb949fbd | 556 | struct netdev_queue { |
6a321cb3 ED |
557 | /* |
558 | * read mostly part | |
559 | */ | |
bb949fbd | 560 | struct net_device *dev; |
46e5da40 | 561 | struct Qdisc __rcu *qdisc; |
b0e1e646 | 562 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 563 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
564 | struct kobject kobj; |
565 | #endif | |
f2cd2d3e ED |
566 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
567 | int numa_node; | |
568 | #endif | |
6a321cb3 ED |
569 | /* |
570 | * write mostly part | |
571 | */ | |
572 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
573 | int xmit_lock_owner; | |
9d21493b ED |
574 | /* |
575 | * please use this field instead of dev->trans_start | |
576 | */ | |
577 | unsigned long trans_start; | |
ccf5ff69 | 578 | |
579 | /* | |
580 | * Number of TX timeouts for this queue | |
581 | * (/sys/class/net/DEV/Q/trans_timeout) | |
582 | */ | |
583 | unsigned long trans_timeout; | |
114cf580 TH |
584 | |
585 | unsigned long state; | |
586 | ||
587 | #ifdef CONFIG_BQL | |
588 | struct dql dql; | |
589 | #endif | |
822b3b2e | 590 | unsigned long tx_maxrate; |
e8a0464c | 591 | } ____cacheline_aligned_in_smp; |
bb949fbd | 592 | |
f2cd2d3e ED |
593 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
594 | { | |
595 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
596 | return q->numa_node; | |
597 | #else | |
b236da69 | 598 | return NUMA_NO_NODE; |
f2cd2d3e ED |
599 | #endif |
600 | } | |
601 | ||
602 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
603 | { | |
604 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
605 | q->numa_node = node; | |
606 | #endif | |
607 | } | |
608 | ||
df334545 | 609 | #ifdef CONFIG_RPS |
0a9627f2 TH |
610 | /* |
611 | * This structure holds an RPS map which can be of variable length. The | |
612 | * map is an array of CPUs. | |
613 | */ | |
614 | struct rps_map { | |
615 | unsigned int len; | |
616 | struct rcu_head rcu; | |
617 | u16 cpus[0]; | |
618 | }; | |
60b778ce | 619 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 620 | |
fec5e652 | 621 | /* |
c445477d BH |
622 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
623 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
624 | * a hardware filter index. | |
fec5e652 TH |
625 | */ |
626 | struct rps_dev_flow { | |
627 | u16 cpu; | |
c445477d | 628 | u16 filter; |
fec5e652 TH |
629 | unsigned int last_qtail; |
630 | }; | |
c445477d | 631 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
632 | |
633 | /* | |
634 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
635 | */ | |
636 | struct rps_dev_flow_table { | |
637 | unsigned int mask; | |
638 | struct rcu_head rcu; | |
fec5e652 TH |
639 | struct rps_dev_flow flows[0]; |
640 | }; | |
641 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 642 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
643 | |
644 | /* | |
645 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
646 | * on which they were processed by the application (set in recvmsg). | |
567e4b79 ED |
647 | * Each entry is a 32bit value. Upper part is the high order bits |
648 | * of flow hash, lower part is cpu number. | |
649 | * rps_cpu_mask is used to partition the space, depending on number of | |
650 | * possible cpus : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 | |
651 | * For example, if 64 cpus are possible, rps_cpu_mask = 0x3f, | |
652 | * meaning we use 32-6=26 bits for the hash. | |
fec5e652 TH |
653 | */ |
654 | struct rps_sock_flow_table { | |
567e4b79 | 655 | u32 mask; |
93c1af6c ED |
656 | |
657 | u32 ents[0] ____cacheline_aligned_in_smp; | |
fec5e652 | 658 | }; |
567e4b79 | 659 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
fec5e652 TH |
660 | |
661 | #define RPS_NO_CPU 0xffff | |
662 | ||
567e4b79 ED |
663 | extern u32 rps_cpu_mask; |
664 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; | |
665 | ||
fec5e652 TH |
666 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
667 | u32 hash) | |
668 | { | |
669 | if (table && hash) { | |
567e4b79 ED |
670 | unsigned int index = hash & table->mask; |
671 | u32 val = hash & ~rps_cpu_mask; | |
fec5e652 TH |
672 | |
673 | /* We only give a hint, preemption can change cpu under us */ | |
567e4b79 | 674 | val |= raw_smp_processor_id(); |
fec5e652 | 675 | |
567e4b79 ED |
676 | if (table->ents[index] != val) |
677 | table->ents[index] = val; | |
fec5e652 TH |
678 | } |
679 | } | |
680 | ||
c445477d | 681 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
682 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
683 | u16 filter_id); | |
c445477d | 684 | #endif |
a953be53 | 685 | #endif /* CONFIG_RPS */ |
c445477d | 686 | |
0a9627f2 TH |
687 | /* This structure contains an instance of an RX queue. */ |
688 | struct netdev_rx_queue { | |
a953be53 | 689 | #ifdef CONFIG_RPS |
6e3f7faf ED |
690 | struct rps_map __rcu *rps_map; |
691 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 692 | #endif |
6e3f7faf | 693 | struct kobject kobj; |
fe822240 | 694 | struct net_device *dev; |
0a9627f2 | 695 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
696 | |
697 | /* | |
698 | * RX queue sysfs structures and functions. | |
699 | */ | |
700 | struct rx_queue_attribute { | |
701 | struct attribute attr; | |
702 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
703 | struct rx_queue_attribute *attr, char *buf); | |
704 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
705 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
706 | }; | |
d314774c | 707 | |
bf264145 TH |
708 | #ifdef CONFIG_XPS |
709 | /* | |
710 | * This structure holds an XPS map which can be of variable length. The | |
711 | * map is an array of queues. | |
712 | */ | |
713 | struct xps_map { | |
714 | unsigned int len; | |
715 | unsigned int alloc_len; | |
716 | struct rcu_head rcu; | |
717 | u16 queues[0]; | |
718 | }; | |
60b778ce | 719 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
bf264145 TH |
720 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
721 | / sizeof(u16)) | |
722 | ||
723 | /* | |
724 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
725 | */ | |
726 | struct xps_dev_maps { | |
727 | struct rcu_head rcu; | |
a4177869 | 728 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
729 | }; |
730 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
731 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
732 | #endif /* CONFIG_XPS */ | |
733 | ||
4f57c087 JF |
734 | #define TC_MAX_QUEUE 16 |
735 | #define TC_BITMASK 15 | |
736 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
737 | struct netdev_tc_txq { | |
738 | u16 count; | |
739 | u16 offset; | |
740 | }; | |
741 | ||
68bad94e NP |
742 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
743 | /* | |
744 | * This structure is to hold information about the device | |
745 | * configured to run FCoE protocol stack. | |
746 | */ | |
747 | struct netdev_fcoe_hbainfo { | |
748 | char manufacturer[64]; | |
749 | char serial_number[64]; | |
750 | char hardware_version[64]; | |
751 | char driver_version[64]; | |
752 | char optionrom_version[64]; | |
753 | char firmware_version[64]; | |
754 | char model[256]; | |
755 | char model_description[256]; | |
756 | }; | |
757 | #endif | |
758 | ||
02637fce | 759 | #define MAX_PHYS_ITEM_ID_LEN 32 |
66b52b0d | 760 | |
02637fce JP |
761 | /* This structure holds a unique identifier to identify some |
762 | * physical item (port for example) used by a netdevice. | |
66b52b0d | 763 | */ |
02637fce JP |
764 | struct netdev_phys_item_id { |
765 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; | |
66b52b0d JP |
766 | unsigned char id_len; |
767 | }; | |
768 | ||
99932d4f DB |
769 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
770 | struct sk_buff *skb); | |
771 | ||
d314774c SH |
772 | /* |
773 | * This structure defines the management hooks for network devices. | |
00829823 SH |
774 | * The following hooks can be defined; unless noted otherwise, they are |
775 | * optional and can be filled with a null pointer. | |
d314774c SH |
776 | * |
777 | * int (*ndo_init)(struct net_device *dev); | |
778 | * This function is called once when network device is registered. | |
779 | * The network device can use this to any late stage initializaton | |
780 | * or semantic validattion. It can fail with an error code which will | |
781 | * be propogated back to register_netdev | |
782 | * | |
783 | * void (*ndo_uninit)(struct net_device *dev); | |
784 | * This function is called when device is unregistered or when registration | |
785 | * fails. It is not called if init fails. | |
786 | * | |
787 | * int (*ndo_open)(struct net_device *dev); | |
788 | * This function is called when network device transistions to the up | |
789 | * state. | |
790 | * | |
791 | * int (*ndo_stop)(struct net_device *dev); | |
792 | * This function is called when network device transistions to the down | |
793 | * state. | |
794 | * | |
dc1f8bf6 SH |
795 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
796 | * struct net_device *dev); | |
00829823 | 797 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
798 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
799 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
800 | * Required can not be NULL. |
801 | * | |
f663dd9a | 802 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 803 | * void *accel_priv, select_queue_fallback_t fallback); |
00829823 SH |
804 | * Called to decide which queue to when device supports multiple |
805 | * transmit queues. | |
806 | * | |
d314774c SH |
807 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
808 | * This function is called to allow device receiver to make | |
809 | * changes to configuration when multicast or promiscious is enabled. | |
810 | * | |
811 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
812 | * This function is called device changes address list filtering. | |
01789349 JP |
813 | * If driver handles unicast address filtering, it should set |
814 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
815 | * |
816 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
817 | * This function is called when the Media Access Control address | |
37b607c5 | 818 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
819 | * mac address can not be changed. |
820 | * | |
821 | * int (*ndo_validate_addr)(struct net_device *dev); | |
822 | * Test if Media Access Control address is valid for the device. | |
823 | * | |
824 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
825 | * Called when a user request an ioctl which can't be handled by | |
826 | * the generic interface code. If not defined ioctl's return | |
827 | * not supported error code. | |
828 | * | |
829 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
830 | * Used to set network devices bus interface parameters. This interface | |
831 | * is retained for legacy reason, new devices should use the bus | |
832 | * interface (PCI) for low level management. | |
833 | * | |
834 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
835 | * Called when a user wants to change the Maximum Transfer Unit | |
836 | * of a device. If not defined, any request to change MTU will | |
837 | * will return an error. | |
838 | * | |
00829823 | 839 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
840 | * Callback uses when the transmitter has not made any progress |
841 | * for dev->watchdog ticks. | |
842 | * | |
3cfde79c | 843 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 844 | * struct rtnl_link_stats64 *storage); |
d308e38f | 845 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 846 | * Called when a user wants to get the network device usage |
be1f3c2c | 847 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
848 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
849 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 850 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
851 | * (which should normally be dev->stats) and return a pointer to |
852 | * it. The structure may be changed asynchronously only if each | |
853 | * field is written atomically. | |
854 | * 3. Update dev->stats asynchronously and atomically, and define | |
855 | * neither operation. | |
d314774c | 856 | * |
5d632cb7 | 857 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
80d5c368 PM |
858 | * If device support VLAN filtering this function is called when a |
859 | * VLAN id is registered. | |
d314774c | 860 | * |
5d632cb7 | 861 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
80d5c368 PM |
862 | * If device support VLAN filtering this function is called when a |
863 | * VLAN id is unregistered. | |
d314774c SH |
864 | * |
865 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
866 | * |
867 | * SR-IOV management functions. | |
868 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
869 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
ed616689 SC |
870 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
871 | * int max_tx_rate); | |
5f8444a3 | 872 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
873 | * int (*ndo_get_vf_config)(struct net_device *dev, |
874 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 875 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
876 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
877 | * struct nlattr *port[]); | |
878 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
879 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
880 | * Called to setup 'tc' number of traffic classes in the net device. This | |
881 | * is always called from the stack with the rtnl lock held and netif tx | |
882 | * queues stopped. This allows the netdevice to perform queue management | |
883 | * safely. | |
c445477d | 884 | * |
e9bce845 YZ |
885 | * Fiber Channel over Ethernet (FCoE) offload functions. |
886 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
887 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
888 | * so the underlying device can perform whatever needed configuration or | |
889 | * initialization to support acceleration of FCoE traffic. | |
890 | * | |
891 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
892 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
893 | * so the underlying device can perform whatever needed clean-ups to | |
894 | * stop supporting acceleration of FCoE traffic. | |
895 | * | |
896 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
897 | * struct scatterlist *sgl, unsigned int sgc); | |
898 | * Called when the FCoE Initiator wants to initialize an I/O that | |
899 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
900 | * perform necessary setup and returns 1 to indicate the device is set up | |
901 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
902 | * | |
903 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
904 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
905 | * indicated by the FC exchange id 'xid', so the underlying device can | |
906 | * clean up and reuse resources for later DDP requests. | |
907 | * | |
908 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
909 | * struct scatterlist *sgl, unsigned int sgc); | |
910 | * Called when the FCoE Target wants to initialize an I/O that | |
911 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
912 | * perform necessary setup and returns 1 to indicate the device is set up | |
913 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
914 | * | |
68bad94e NP |
915 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
916 | * struct netdev_fcoe_hbainfo *hbainfo); | |
917 | * Called when the FCoE Protocol stack wants information on the underlying | |
918 | * device. This information is utilized by the FCoE protocol stack to | |
919 | * register attributes with Fiber Channel management service as per the | |
920 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
921 | * | |
e9bce845 YZ |
922 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
923 | * Called when the underlying device wants to override default World Wide | |
924 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
925 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
926 | * protocol stack to use. | |
927 | * | |
c445477d BH |
928 | * RFS acceleration. |
929 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
930 | * u16 rxq_index, u32 flow_id); | |
931 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
932 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
933 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 934 | * |
8b98a70c | 935 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
936 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
937 | * Called to make another netdev an underling. | |
938 | * | |
939 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
940 | * Called to release previously enslaved netdev. | |
5455c699 MM |
941 | * |
942 | * Feature/offload setting functions. | |
c8f44aff MM |
943 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
944 | * netdev_features_t features); | |
5455c699 MM |
945 | * Adjusts the requested feature flags according to device-specific |
946 | * constraints, and returns the resulting flags. Must not modify | |
947 | * the device state. | |
948 | * | |
c8f44aff | 949 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
950 | * Called to update device configuration to new features. Passed |
951 | * feature set might be less than what was returned by ndo_fix_features()). | |
952 | * Must return >0 or -errno if it changed dev->features itself. | |
953 | * | |
edc7d573 | 954 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
955 | * struct net_device *dev, | |
f6f6424b | 956 | * const unsigned char *addr, u16 vid, u16 flags) |
77162022 | 957 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
958 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
959 | * struct net_device *dev, | |
f6f6424b | 960 | * const unsigned char *addr, u16 vid) |
77162022 JF |
961 | * Deletes the FDB entry from dev coresponding to addr. |
962 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
963 | * struct net_device *dev, struct net_device *filter_dev, |
964 | * int idx) | |
77162022 JF |
965 | * Used to add FDB entries to dump requests. Implementers should add |
966 | * entries to skb and update idx with the number of entries. | |
e5a55a89 | 967 | * |
ad41faa8 ND |
968 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
969 | * u16 flags) | |
e5a55a89 | 970 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
24f11a5c | 971 | * struct net_device *dev, u32 filter_mask) |
ad41faa8 ND |
972 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
973 | * u16 flags); | |
4bf84c35 JP |
974 | * |
975 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
976 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
977 | * which do not represent real hardware may define this to allow their | |
978 | * userspace components to manage their virtual carrier state. Devices | |
979 | * that determine carrier state from physical hardware properties (eg | |
980 | * network cables) or protocol-dependent mechanisms (eg | |
981 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
982 | * |
983 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
02637fce | 984 | * struct netdev_phys_item_id *ppid); |
66b52b0d JP |
985 | * Called to get ID of physical port of this device. If driver does |
986 | * not implement this, it is assumed that the hw is not able to have | |
987 | * multiple net devices on single physical port. | |
53cf5275 JG |
988 | * |
989 | * void (*ndo_add_vxlan_port)(struct net_device *dev, | |
35e42379 | 990 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
991 | * Called by vxlan to notiy a driver about the UDP port and socket |
992 | * address family that vxlan is listnening to. It is called only when | |
993 | * a new port starts listening. The operation is protected by the | |
994 | * vxlan_net->sock_lock. | |
995 | * | |
996 | * void (*ndo_del_vxlan_port)(struct net_device *dev, | |
35e42379 | 997 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
998 | * Called by vxlan to notify the driver about a UDP port and socket |
999 | * address family that vxlan is not listening to anymore. The operation | |
1000 | * is protected by the vxlan_net->sock_lock. | |
a6cc0cfa JF |
1001 | * |
1002 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
1003 | * struct net_device *dev) | |
1004 | * Called by upper layer devices to accelerate switching or other | |
1005 | * station functionality into hardware. 'pdev is the lowerdev | |
1006 | * to use for the offload and 'dev' is the net device that will | |
1007 | * back the offload. Returns a pointer to the private structure | |
1008 | * the upper layer will maintain. | |
1009 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
1010 | * Called by upper layer device to delete the station created | |
1011 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
1012 | * the station and priv is the structure returned by the add | |
1013 | * operation. | |
1014 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, | |
1015 | * struct net_device *dev, | |
1016 | * void *priv); | |
1017 | * Callback to use for xmit over the accelerated station. This | |
1018 | * is used in place of ndo_start_xmit on accelerated net | |
1019 | * devices. | |
5f35227e JG |
1020 | * netdev_features_t (*ndo_features_check) (struct sk_buff *skb, |
1021 | * struct net_device *dev | |
1022 | * netdev_features_t features); | |
04ffcb25 | 1023 | * Called by core transmit path to determine if device is capable of |
5f35227e JG |
1024 | * performing offload operations on a given packet. This is to give |
1025 | * the device an opportunity to implement any restrictions that cannot | |
1026 | * be otherwise expressed by feature flags. The check is called with | |
1027 | * the set of features that the stack has calculated and it returns | |
1028 | * those the driver believes to be appropriate. | |
822b3b2e JF |
1029 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1030 | * int queue_index, u32 maxrate); | |
1031 | * Called when a user wants to set a max-rate limitation of specific | |
1032 | * TX queue. | |
d314774c SH |
1033 | */ |
1034 | struct net_device_ops { | |
1035 | int (*ndo_init)(struct net_device *dev); | |
1036 | void (*ndo_uninit)(struct net_device *dev); | |
1037 | int (*ndo_open)(struct net_device *dev); | |
1038 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 1039 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
1040 | struct net_device *dev); |
1041 | u16 (*ndo_select_queue)(struct net_device *dev, | |
f663dd9a | 1042 | struct sk_buff *skb, |
99932d4f DB |
1043 | void *accel_priv, |
1044 | select_queue_fallback_t fallback); | |
d314774c SH |
1045 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1046 | int flags); | |
d314774c | 1047 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1048 | int (*ndo_set_mac_address)(struct net_device *dev, |
1049 | void *addr); | |
d314774c | 1050 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1051 | int (*ndo_do_ioctl)(struct net_device *dev, |
1052 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1053 | int (*ndo_set_config)(struct net_device *dev, |
1054 | struct ifmap *map); | |
00829823 SH |
1055 | int (*ndo_change_mtu)(struct net_device *dev, |
1056 | int new_mtu); | |
1057 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1058 | struct neigh_parms *); | |
d314774c SH |
1059 | void (*ndo_tx_timeout) (struct net_device *dev); |
1060 | ||
28172739 ED |
1061 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
1062 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
1063 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1064 | ||
8e586137 | 1065 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1066 | __be16 proto, u16 vid); |
8e586137 | 1067 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1068 | __be16 proto, u16 vid); |
d314774c | 1069 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1070 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1071 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1072 | struct netpoll_info *info); |
0e34e931 | 1073 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 | 1074 | #endif |
e0d1095a | 1075 | #ifdef CONFIG_NET_RX_BUSY_POLL |
8b80cda5 | 1076 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 1077 | #endif |
95c26df8 WM |
1078 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1079 | int queue, u8 *mac); | |
1080 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
1081 | int queue, u16 vlan, u8 qos); | |
ed616689 SC |
1082 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1083 | int vf, int min_tx_rate, | |
1084 | int max_tx_rate); | |
5f8444a3 GR |
1085 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1086 | int vf, bool setting); | |
95c26df8 WM |
1087 | int (*ndo_get_vf_config)(struct net_device *dev, |
1088 | int vf, | |
1089 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1090 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1091 | int vf, int link_state); | |
57b61080 SF |
1092 | int (*ndo_set_vf_port)(struct net_device *dev, |
1093 | int vf, | |
1094 | struct nlattr *port[]); | |
1095 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1096 | int vf, struct sk_buff *skb); | |
4f57c087 | 1097 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
d11ead75 | 1098 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1099 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1100 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1101 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1102 | u16 xid, | |
1103 | struct scatterlist *sgl, | |
1104 | unsigned int sgc); | |
1105 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1106 | u16 xid); | |
6247e086 YZ |
1107 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1108 | u16 xid, | |
1109 | struct scatterlist *sgl, | |
1110 | unsigned int sgc); | |
68bad94e NP |
1111 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1112 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1113 | #endif |
1114 | ||
d11ead75 | 1115 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1116 | #define NETDEV_FCOE_WWNN 0 |
1117 | #define NETDEV_FCOE_WWPN 1 | |
1118 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1119 | u64 *wwn, int type); | |
4d288d57 | 1120 | #endif |
3c9c36bc | 1121 | |
c445477d BH |
1122 | #ifdef CONFIG_RFS_ACCEL |
1123 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1124 | const struct sk_buff *skb, | |
1125 | u16 rxq_index, | |
1126 | u32 flow_id); | |
1127 | #endif | |
fbaec0ea JP |
1128 | int (*ndo_add_slave)(struct net_device *dev, |
1129 | struct net_device *slave_dev); | |
1130 | int (*ndo_del_slave)(struct net_device *dev, | |
1131 | struct net_device *slave_dev); | |
c8f44aff MM |
1132 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1133 | netdev_features_t features); | |
5455c699 | 1134 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1135 | netdev_features_t features); |
da6a8fa0 | 1136 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1137 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1138 | |
1139 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1140 | struct nlattr *tb[], |
77162022 | 1141 | struct net_device *dev, |
6b6e2725 | 1142 | const unsigned char *addr, |
f6f6424b | 1143 | u16 vid, |
77162022 JF |
1144 | u16 flags); |
1145 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1146 | struct nlattr *tb[], |
77162022 | 1147 | struct net_device *dev, |
f6f6424b JP |
1148 | const unsigned char *addr, |
1149 | u16 vid); | |
77162022 JF |
1150 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1151 | struct netlink_callback *cb, | |
1152 | struct net_device *dev, | |
5d5eacb3 | 1153 | struct net_device *filter_dev, |
77162022 | 1154 | int idx); |
e5a55a89 JF |
1155 | |
1156 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
add511b3 RP |
1157 | struct nlmsghdr *nlh, |
1158 | u16 flags); | |
e5a55a89 JF |
1159 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1160 | u32 pid, u32 seq, | |
6cbdceeb VY |
1161 | struct net_device *dev, |
1162 | u32 filter_mask); | |
407af329 | 1163 | int (*ndo_bridge_dellink)(struct net_device *dev, |
add511b3 RP |
1164 | struct nlmsghdr *nlh, |
1165 | u16 flags); | |
4bf84c35 JP |
1166 | int (*ndo_change_carrier)(struct net_device *dev, |
1167 | bool new_carrier); | |
66b52b0d | 1168 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
02637fce | 1169 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
1170 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1171 | char *name, size_t len); | |
53cf5275 JG |
1172 | void (*ndo_add_vxlan_port)(struct net_device *dev, |
1173 | sa_family_t sa_family, | |
35e42379 | 1174 | __be16 port); |
53cf5275 JG |
1175 | void (*ndo_del_vxlan_port)(struct net_device *dev, |
1176 | sa_family_t sa_family, | |
35e42379 | 1177 | __be16 port); |
a6cc0cfa JF |
1178 | |
1179 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
1180 | struct net_device *dev); | |
1181 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1182 | void *priv); | |
1183 | ||
1184 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, | |
1185 | struct net_device *dev, | |
1186 | void *priv); | |
25175ba5 | 1187 | int (*ndo_get_lock_subclass)(struct net_device *dev); |
5f35227e JG |
1188 | netdev_features_t (*ndo_features_check) (struct sk_buff *skb, |
1189 | struct net_device *dev, | |
1190 | netdev_features_t features); | |
822b3b2e JF |
1191 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1192 | int queue_index, | |
1193 | u32 maxrate); | |
d314774c SH |
1194 | }; |
1195 | ||
7aa98047 LR |
1196 | /** |
1197 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1198 | * | |
1199 | * These are the &struct net_device, they are only set internally | |
1200 | * by drivers and used in the kernel. These flags are invisible to | |
1201 | * userspace, this means that the order of these flags can change | |
1202 | * during any kernel release. | |
1203 | * | |
1204 | * You should have a pretty good reason to be extending these flags. | |
1205 | * | |
1206 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1207 | * @IFF_EBRIDGE: Ethernet bridging device | |
1208 | * @IFF_SLAVE_INACTIVE: bonding slave not the curr. active | |
1209 | * @IFF_MASTER_8023AD: bonding master, 802.3ad | |
1210 | * @IFF_MASTER_ALB: bonding master, balance-alb | |
1211 | * @IFF_BONDING: bonding master or slave | |
1212 | * @IFF_SLAVE_NEEDARP: need ARPs for validation | |
1213 | * @IFF_ISATAP: ISATAP interface (RFC4214) | |
1214 | * @IFF_MASTER_ARPMON: bonding master, ARP mon in use | |
1215 | * @IFF_WAN_HDLC: WAN HDLC device | |
1216 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1217 | * release skb->dst | |
1218 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1219 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1220 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1221 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1222 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1223 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1224 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1225 | * @IFF_TEAM_PORT: device used as team port | |
1226 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1227 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1228 | * change when it's running | |
1229 | * @IFF_MACVLAN: Macvlan device | |
1230 | */ | |
1231 | enum netdev_priv_flags { | |
1232 | IFF_802_1Q_VLAN = 1<<0, | |
1233 | IFF_EBRIDGE = 1<<1, | |
1234 | IFF_SLAVE_INACTIVE = 1<<2, | |
1235 | IFF_MASTER_8023AD = 1<<3, | |
1236 | IFF_MASTER_ALB = 1<<4, | |
1237 | IFF_BONDING = 1<<5, | |
1238 | IFF_SLAVE_NEEDARP = 1<<6, | |
1239 | IFF_ISATAP = 1<<7, | |
1240 | IFF_MASTER_ARPMON = 1<<8, | |
1241 | IFF_WAN_HDLC = 1<<9, | |
1242 | IFF_XMIT_DST_RELEASE = 1<<10, | |
1243 | IFF_DONT_BRIDGE = 1<<11, | |
1244 | IFF_DISABLE_NETPOLL = 1<<12, | |
1245 | IFF_MACVLAN_PORT = 1<<13, | |
1246 | IFF_BRIDGE_PORT = 1<<14, | |
1247 | IFF_OVS_DATAPATH = 1<<15, | |
1248 | IFF_TX_SKB_SHARING = 1<<16, | |
1249 | IFF_UNICAST_FLT = 1<<17, | |
1250 | IFF_TEAM_PORT = 1<<18, | |
1251 | IFF_SUPP_NOFCS = 1<<19, | |
1252 | IFF_LIVE_ADDR_CHANGE = 1<<20, | |
1253 | IFF_MACVLAN = 1<<21, | |
02875878 | 1254 | IFF_XMIT_DST_RELEASE_PERM = 1<<22, |
2ad7bf36 MB |
1255 | IFF_IPVLAN_MASTER = 1<<23, |
1256 | IFF_IPVLAN_SLAVE = 1<<24, | |
7aa98047 LR |
1257 | }; |
1258 | ||
1259 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1260 | #define IFF_EBRIDGE IFF_EBRIDGE | |
1261 | #define IFF_SLAVE_INACTIVE IFF_SLAVE_INACTIVE | |
1262 | #define IFF_MASTER_8023AD IFF_MASTER_8023AD | |
1263 | #define IFF_MASTER_ALB IFF_MASTER_ALB | |
1264 | #define IFF_BONDING IFF_BONDING | |
1265 | #define IFF_SLAVE_NEEDARP IFF_SLAVE_NEEDARP | |
1266 | #define IFF_ISATAP IFF_ISATAP | |
1267 | #define IFF_MASTER_ARPMON IFF_MASTER_ARPMON | |
1268 | #define IFF_WAN_HDLC IFF_WAN_HDLC | |
1269 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1270 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1271 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1272 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1273 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1274 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1275 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1276 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1277 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1278 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1279 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1280 | #define IFF_MACVLAN IFF_MACVLAN | |
02875878 | 1281 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
2ad7bf36 MB |
1282 | #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER |
1283 | #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE | |
7aa98047 | 1284 | |
536721b1 KK |
1285 | /** |
1286 | * struct net_device - The DEVICE structure. | |
1287 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1288 | * data with strictly "high-level" data, and it has to know about | |
1289 | * almost every data structure used in the INET module. | |
1290 | * | |
1291 | * @name: This is the first field of the "visible" part of this structure | |
1292 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
1293 | * of the interface. | |
1294 | * | |
1295 | * @name_hlist: Device name hash chain, please keep it close to name[] | |
1296 | * @ifalias: SNMP alias | |
1297 | * @mem_end: Shared memory end | |
1298 | * @mem_start: Shared memory start | |
1299 | * @base_addr: Device I/O address | |
1300 | * @irq: Device IRQ number | |
1301 | * | |
1302 | * @state: Generic network queuing layer state, see netdev_state_t | |
1303 | * @dev_list: The global list of network devices | |
1304 | * @napi_list: List entry, that is used for polling napi devices | |
1305 | * @unreg_list: List entry, that is used, when we are unregistering the | |
1306 | * device, see the function unregister_netdev | |
1307 | * @close_list: List entry, that is used, when we are closing the device | |
1308 | * | |
1309 | * @adj_list: Directly linked devices, like slaves for bonding | |
1310 | * @all_adj_list: All linked devices, *including* neighbours | |
1311 | * @features: Currently active device features | |
1312 | * @hw_features: User-changeable features | |
1313 | * | |
1314 | * @wanted_features: User-requested features | |
1315 | * @vlan_features: Mask of features inheritable by VLAN devices | |
1316 | * | |
1317 | * @hw_enc_features: Mask of features inherited by encapsulating devices | |
1318 | * This field indicates what encapsulation | |
1319 | * offloads the hardware is capable of doing, | |
1320 | * and drivers will need to set them appropriately. | |
1321 | * | |
1322 | * @mpls_features: Mask of features inheritable by MPLS | |
1323 | * | |
1324 | * @ifindex: interface index | |
1325 | * @iflink: unique device identifier | |
1326 | * | |
1327 | * @stats: Statistics struct, which was left as a legacy, use | |
1328 | * rtnl_link_stats64 instead | |
1329 | * | |
1330 | * @rx_dropped: Dropped packets by core network, | |
1331 | * do not use this in drivers | |
1332 | * @tx_dropped: Dropped packets by core network, | |
1333 | * do not use this in drivers | |
1334 | * | |
1335 | * @carrier_changes: Stats to monitor carrier on<->off transitions | |
1336 | * | |
1337 | * @wireless_handlers: List of functions to handle Wireless Extensions, | |
1338 | * instead of ioctl, | |
1339 | * see <net/iw_handler.h> for details. | |
1340 | * @wireless_data: Instance data managed by the core of wireless extensions | |
1341 | * | |
1342 | * @netdev_ops: Includes several pointers to callbacks, | |
1343 | * if one wants to override the ndo_*() functions | |
1344 | * @ethtool_ops: Management operations | |
d476059e | 1345 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
536721b1 KK |
1346 | * of Layer 2 headers. |
1347 | * | |
1348 | * @flags: Interface flags (a la BSD) | |
1349 | * @priv_flags: Like 'flags' but invisible to userspace, | |
1350 | * see if.h for the definitions | |
1351 | * @gflags: Global flags ( kept as legacy ) | |
1352 | * @padded: How much padding added by alloc_netdev() | |
1353 | * @operstate: RFC2863 operstate | |
1354 | * @link_mode: Mapping policy to operstate | |
1355 | * @if_port: Selectable AUI, TP, ... | |
1356 | * @dma: DMA channel | |
1357 | * @mtu: Interface MTU value | |
1358 | * @type: Interface hardware type | |
1359 | * @hard_header_len: Hardware header length | |
1360 | * | |
1361 | * @needed_headroom: Extra headroom the hardware may need, but not in all | |
1362 | * cases can this be guaranteed | |
1363 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all | |
1364 | * cases can this be guaranteed. Some cases also use | |
1365 | * LL_MAX_HEADER instead to allocate the skb | |
1366 | * | |
1367 | * interface address info: | |
1368 | * | |
1369 | * @perm_addr: Permanent hw address | |
1370 | * @addr_assign_type: Hw address assignment type | |
1371 | * @addr_len: Hardware address length | |
1372 | * @neigh_priv_len; Used in neigh_alloc(), | |
1373 | * initialized only in atm/clip.c | |
1374 | * @dev_id: Used to differentiate devices that share | |
1375 | * the same link layer address | |
1376 | * @dev_port: Used to differentiate devices that share | |
1377 | * the same function | |
1378 | * @addr_list_lock: XXX: need comments on this one | |
1379 | * @uc: unicast mac addresses | |
1380 | * @mc: multicast mac addresses | |
1381 | * @dev_addrs: list of device hw addresses | |
1382 | * @queues_kset: Group of all Kobjects in the Tx and RX queues | |
1383 | * @uc_promisc: Counter, that indicates, that promiscuous mode | |
1384 | * has been enabled due to the need to listen to | |
1385 | * additional unicast addresses in a device that | |
1386 | * does not implement ndo_set_rx_mode() | |
1387 | * @promiscuity: Number of times, the NIC is told to work in | |
1388 | * Promiscuous mode, if it becomes 0 the NIC will | |
1389 | * exit from working in Promiscuous mode | |
1390 | * @allmulti: Counter, enables or disables allmulticast mode | |
1391 | * | |
1392 | * @vlan_info: VLAN info | |
1393 | * @dsa_ptr: dsa specific data | |
1394 | * @tipc_ptr: TIPC specific data | |
1395 | * @atalk_ptr: AppleTalk link | |
1396 | * @ip_ptr: IPv4 specific data | |
1397 | * @dn_ptr: DECnet specific data | |
1398 | * @ip6_ptr: IPv6 specific data | |
1399 | * @ax25_ptr: AX.25 specific data | |
1400 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering | |
1401 | * | |
1402 | * @last_rx: Time of last Rx | |
1403 | * @dev_addr: Hw address (before bcast, | |
1404 | * because most packets are unicast) | |
1405 | * | |
1406 | * @_rx: Array of RX queues | |
1407 | * @num_rx_queues: Number of RX queues | |
1408 | * allocated at register_netdev() time | |
1409 | * @real_num_rx_queues: Number of RX queues currently active in device | |
1410 | * | |
1411 | * @rx_handler: handler for received packets | |
1412 | * @rx_handler_data: XXX: need comments on this one | |
1413 | * @ingress_queue: XXX: need comments on this one | |
1414 | * @broadcast: hw bcast address | |
1415 | * | |
1416 | * @_tx: Array of TX queues | |
1417 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time | |
1418 | * @real_num_tx_queues: Number of TX queues currently active in device | |
1419 | * @qdisc: Root qdisc from userspace point of view | |
1420 | * @tx_queue_len: Max frames per queue allowed | |
1421 | * @tx_global_lock: XXX: need comments on this one | |
1422 | * | |
1423 | * @xps_maps: XXX: need comments on this one | |
1424 | * | |
1425 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, | |
1426 | * indexed by RX queue number. Assigned by driver. | |
1427 | * This must only be set if the ndo_rx_flow_steer | |
1428 | * operation is defined | |
1429 | * | |
1430 | * @trans_start: Time (in jiffies) of last Tx | |
1431 | * @watchdog_timeo: Represents the timeout that is used by | |
1432 | * the watchdog ( see dev_watchdog() ) | |
1433 | * @watchdog_timer: List of timers | |
1434 | * | |
1435 | * @pcpu_refcnt: Number of references to this device | |
1436 | * @todo_list: Delayed register/unregister | |
1437 | * @index_hlist: Device index hash chain | |
1438 | * @link_watch_list: XXX: need comments on this one | |
1439 | * | |
1440 | * @reg_state: Register/unregister state machine | |
1441 | * @dismantle: Device is going to be freed | |
1442 | * @rtnl_link_state: This enum represents the phases of creating | |
1443 | * a new link | |
1444 | * | |
1445 | * @destructor: Called from unregister, | |
1446 | * can be used to call free_netdev | |
1447 | * @npinfo: XXX: need comments on this one | |
1448 | * @nd_net: Network namespace this network device is inside | |
1449 | * | |
1450 | * @ml_priv: Mid-layer private | |
1451 | * @lstats: Loopback statistics | |
1452 | * @tstats: Tunnel statistics | |
1453 | * @dstats: Dummy statistics | |
1454 | * @vstats: Virtual ethernet statistics | |
1455 | * | |
1456 | * @garp_port: GARP | |
1457 | * @mrp_port: MRP | |
1458 | * | |
1459 | * @dev: Class/net/name entry | |
1460 | * @sysfs_groups: Space for optional device, statistics and wireless | |
1461 | * sysfs groups | |
1462 | * | |
1463 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes | |
1464 | * @rtnl_link_ops: Rtnl_link_ops | |
1465 | * | |
1466 | * @gso_max_size: Maximum size of generic segmentation offload | |
1467 | * @gso_max_segs: Maximum number of segments that can be passed to the | |
1468 | * NIC for GSO | |
fcbeb976 ED |
1469 | * @gso_min_segs: Minimum number of segments that can be passed to the |
1470 | * NIC for GSO | |
536721b1 KK |
1471 | * |
1472 | * @dcbnl_ops: Data Center Bridging netlink ops | |
1473 | * @num_tc: Number of traffic classes in the net device | |
1474 | * @tc_to_txq: XXX: need comments on this one | |
1475 | * @prio_tc_map XXX: need comments on this one | |
1476 | * | |
1477 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp | |
1478 | * | |
1479 | * @priomap: XXX: need comments on this one | |
1480 | * @phydev: Physical device may attach itself | |
1481 | * for hardware timestamping | |
1482 | * | |
1483 | * @qdisc_tx_busylock: XXX: need comments on this one | |
1484 | * | |
1485 | * @group: The group, that the device belongs to | |
1486 | * @pm_qos_req: Power Management QoS object | |
1da177e4 LT |
1487 | * |
1488 | * FIXME: cleanup struct net_device such that network protocol info | |
1489 | * moves out. | |
1490 | */ | |
1491 | ||
d94d9fee | 1492 | struct net_device { |
1da177e4 | 1493 | char name[IFNAMSIZ]; |
9356b8fc | 1494 | struct hlist_node name_hlist; |
0b815a1a | 1495 | char *ifalias; |
1da177e4 LT |
1496 | /* |
1497 | * I/O specific fields | |
1498 | * FIXME: Merge these and struct ifmap into one | |
1499 | */ | |
536721b1 KK |
1500 | unsigned long mem_end; |
1501 | unsigned long mem_start; | |
1502 | unsigned long base_addr; | |
1503 | int irq; | |
1da177e4 LT |
1504 | |
1505 | /* | |
536721b1 KK |
1506 | * Some hardware also needs these fields (state,dev_list, |
1507 | * napi_list,unreg_list,close_list) but they are not | |
1da177e4 LT |
1508 | * part of the usual set specified in Space.c. |
1509 | */ | |
1510 | ||
1da177e4 LT |
1511 | unsigned long state; |
1512 | ||
7562f876 | 1513 | struct list_head dev_list; |
bea3348e | 1514 | struct list_head napi_list; |
44a0873d | 1515 | struct list_head unreg_list; |
5cde2829 | 1516 | struct list_head close_list; |
7866a621 SN |
1517 | struct list_head ptype_all; |
1518 | struct list_head ptype_specific; | |
2f268f12 | 1519 | |
2f268f12 VF |
1520 | struct { |
1521 | struct list_head upper; | |
1522 | struct list_head lower; | |
1523 | } adj_list; | |
1524 | ||
2f268f12 VF |
1525 | struct { |
1526 | struct list_head upper; | |
1527 | struct list_head lower; | |
1528 | } all_adj_list; | |
4c3d5e7b | 1529 | |
c8f44aff | 1530 | netdev_features_t features; |
c8f44aff | 1531 | netdev_features_t hw_features; |
c8f44aff | 1532 | netdev_features_t wanted_features; |
c8f44aff | 1533 | netdev_features_t vlan_features; |
6a674e9c | 1534 | netdev_features_t hw_enc_features; |
0d89d203 | 1535 | netdev_features_t mpls_features; |
04ed3e74 | 1536 | |
1da177e4 LT |
1537 | int ifindex; |
1538 | int iflink; | |
1539 | ||
c45d286e | 1540 | struct net_device_stats stats; |
015f0688 | 1541 | |
015f0688 ED |
1542 | atomic_long_t rx_dropped; |
1543 | atomic_long_t tx_dropped; | |
1da177e4 | 1544 | |
2d3b479d | 1545 | atomic_t carrier_changes; |
1546 | ||
b86e0280 | 1547 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 | 1548 | const struct iw_handler_def * wireless_handlers; |
1da177e4 | 1549 | struct iw_public_data * wireless_data; |
b86e0280 | 1550 | #endif |
d314774c | 1551 | const struct net_device_ops *netdev_ops; |
76fd8593 | 1552 | const struct ethtool_ops *ethtool_ops; |
4170604f SF |
1553 | #ifdef CONFIG_NET_SWITCHDEV |
1554 | const struct swdev_ops *swdev_ops; | |
1555 | #endif | |
1da177e4 | 1556 | |
3b04ddde SH |
1557 | const struct header_ops *header_ops; |
1558 | ||
536721b1 KK |
1559 | unsigned int flags; |
1560 | unsigned int priv_flags; | |
1561 | ||
1da177e4 | 1562 | unsigned short gflags; |
536721b1 | 1563 | unsigned short padded; |
1da177e4 | 1564 | |
536721b1 KK |
1565 | unsigned char operstate; |
1566 | unsigned char link_mode; | |
b00055aa | 1567 | |
536721b1 KK |
1568 | unsigned char if_port; |
1569 | unsigned char dma; | |
bdc220da | 1570 | |
536721b1 KK |
1571 | unsigned int mtu; |
1572 | unsigned short type; | |
1573 | unsigned short hard_header_len; | |
1da177e4 | 1574 | |
f5184d26 JB |
1575 | unsigned short needed_headroom; |
1576 | unsigned short needed_tailroom; | |
1577 | ||
1da177e4 | 1578 | /* Interface address info. */ |
536721b1 KK |
1579 | unsigned char perm_addr[MAX_ADDR_LEN]; |
1580 | unsigned char addr_assign_type; | |
1581 | unsigned char addr_len; | |
a0a9663d | 1582 | unsigned short neigh_priv_len; |
536721b1 KK |
1583 | unsigned short dev_id; |
1584 | unsigned short dev_port; | |
ccffad25 | 1585 | spinlock_t addr_list_lock; |
536721b1 KK |
1586 | struct netdev_hw_addr_list uc; |
1587 | struct netdev_hw_addr_list mc; | |
1588 | struct netdev_hw_addr_list dev_addrs; | |
1589 | ||
4c3d5e7b ED |
1590 | #ifdef CONFIG_SYSFS |
1591 | struct kset *queues_kset; | |
1592 | #endif | |
1593 | ||
685343fc TG |
1594 | unsigned char name_assign_type; |
1595 | ||
2d348d1f | 1596 | bool uc_promisc; |
9d45abe1 WC |
1597 | unsigned int promiscuity; |
1598 | unsigned int allmulti; | |
1da177e4 | 1599 | |
1da177e4 LT |
1600 | |
1601 | /* Protocol specific pointers */ | |
65ac6a5f | 1602 | |
d11ead75 | 1603 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
536721b1 | 1604 | struct vlan_info __rcu *vlan_info; |
65ac6a5f | 1605 | #endif |
34a430d7 | 1606 | #if IS_ENABLED(CONFIG_NET_DSA) |
536721b1 | 1607 | struct dsa_switch_tree *dsa_ptr; |
37cb0620 YX |
1608 | #endif |
1609 | #if IS_ENABLED(CONFIG_TIPC) | |
536721b1 | 1610 | struct tipc_bearer __rcu *tipc_ptr; |
91da11f8 | 1611 | #endif |
536721b1 KK |
1612 | void *atalk_ptr; |
1613 | struct in_device __rcu *ip_ptr; | |
1614 | struct dn_dev __rcu *dn_ptr; | |
1615 | struct inet6_dev __rcu *ip6_ptr; | |
1616 | void *ax25_ptr; | |
1617 | struct wireless_dev *ieee80211_ptr; | |
98a18b6f | 1618 | struct wpan_dev *ieee802154_ptr; |
1da177e4 | 1619 | |
9356b8fc | 1620 | /* |
cd13539b | 1621 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1622 | */ |
536721b1 | 1623 | unsigned long last_rx; |
4dc89133 | 1624 | |
9356b8fc | 1625 | /* Interface address info used in eth_type_trans() */ |
536721b1 | 1626 | unsigned char *dev_addr; |
f001fde5 | 1627 | |
0a9627f2 | 1628 | |
a953be53 | 1629 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1630 | struct netdev_rx_queue *_rx; |
1631 | ||
0a9627f2 | 1632 | unsigned int num_rx_queues; |
62fe0b40 | 1633 | unsigned int real_num_rx_queues; |
c445477d | 1634 | |
df334545 | 1635 | #endif |
0a9627f2 | 1636 | |
3b47d303 | 1637 | unsigned long gro_flush_timeout; |
61391cde | 1638 | rx_handler_func_t __rcu *rx_handler; |
1639 | void __rcu *rx_handler_data; | |
e8a0464c | 1640 | |
24824a09 | 1641 | struct netdev_queue __rcu *ingress_queue; |
536721b1 | 1642 | unsigned char broadcast[MAX_ADDR_LEN]; |
4c3d5e7b | 1643 | |
cd13539b ED |
1644 | |
1645 | /* | |
1646 | * Cache lines mostly used on transmit path | |
1647 | */ | |
e8a0464c DM |
1648 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
1649 | unsigned int num_tx_queues; | |
fd2ea0a7 | 1650 | unsigned int real_num_tx_queues; |
af356afa | 1651 | struct Qdisc *qdisc; |
536721b1 | 1652 | unsigned long tx_queue_len; |
c3f26a26 | 1653 | spinlock_t tx_global_lock; |
cd13539b | 1654 | |
bf264145 | 1655 | #ifdef CONFIG_XPS |
a4177869 | 1656 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1657 | #endif |
4c3d5e7b | 1658 | #ifdef CONFIG_RFS_ACCEL |
4c3d5e7b ED |
1659 | struct cpu_rmap *rx_cpu_rmap; |
1660 | #endif | |
1d24eb48 | 1661 | |
9356b8fc | 1662 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1663 | |
1664 | /* | |
1665 | * trans_start here is expensive for high speed devices on SMP, | |
1666 | * please use netdev_queue->trans_start instead. | |
1667 | */ | |
536721b1 | 1668 | unsigned long trans_start; |
9356b8fc | 1669 | |
536721b1 | 1670 | int watchdog_timeo; |
9356b8fc ED |
1671 | struct timer_list watchdog_timer; |
1672 | ||
29b4433d | 1673 | int __percpu *pcpu_refcnt; |
1da177e4 | 1674 | struct list_head todo_list; |
1da177e4 | 1675 | |
536721b1 | 1676 | struct hlist_node index_hlist; |
e014debe | 1677 | struct list_head link_watch_list; |
572a103d | 1678 | |
1da177e4 | 1679 | enum { NETREG_UNINITIALIZED=0, |
b17a7c17 | 1680 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1681 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1682 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1683 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1684 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1685 | } reg_state:8; |
1686 | ||
536721b1 | 1687 | bool dismantle; |
a2835763 PM |
1688 | |
1689 | enum { | |
1690 | RTNL_LINK_INITIALIZED, | |
1691 | RTNL_LINK_INITIALIZING, | |
1692 | } rtnl_link_state:16; | |
1da177e4 | 1693 | |
d314774c | 1694 | void (*destructor)(struct net_device *dev); |
1da177e4 | 1695 | |
1da177e4 | 1696 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1697 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1698 | #endif |
eae792b7 | 1699 | |
0c5c9fb5 | 1700 | possible_net_t nd_net; |
4a1c5371 | 1701 | |
4951704b | 1702 | /* mid-layer private */ |
a7855c78 | 1703 | union { |
536721b1 KK |
1704 | void *ml_priv; |
1705 | struct pcpu_lstats __percpu *lstats; | |
8f84985f | 1706 | struct pcpu_sw_netstats __percpu *tstats; |
536721b1 KK |
1707 | struct pcpu_dstats __percpu *dstats; |
1708 | struct pcpu_vstats __percpu *vstats; | |
a7855c78 | 1709 | }; |
536721b1 | 1710 | |
3cc77ec7 | 1711 | struct garp_port __rcu *garp_port; |
febf018d | 1712 | struct mrp_port __rcu *mrp_port; |
1da177e4 | 1713 | |
536721b1 | 1714 | struct device dev; |
0c509a6c | 1715 | const struct attribute_group *sysfs_groups[4]; |
a953be53 | 1716 | const struct attribute_group *sysfs_rx_queue_group; |
38f7b870 | 1717 | |
38f7b870 | 1718 | const struct rtnl_link_ops *rtnl_link_ops; |
f25f4e44 | 1719 | |
82cc1a7a PWJ |
1720 | /* for setting kernel sock attribute on TCP connection setup */ |
1721 | #define GSO_MAX_SIZE 65536 | |
1722 | unsigned int gso_max_size; | |
30b678d8 BH |
1723 | #define GSO_MAX_SEGS 65535 |
1724 | u16 gso_max_segs; | |
fcbeb976 | 1725 | u16 gso_min_segs; |
7a6b6f51 | 1726 | #ifdef CONFIG_DCB |
32953543 | 1727 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1728 | #endif |
4f57c087 JF |
1729 | u8 num_tc; |
1730 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1731 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1732 | |
d11ead75 | 1733 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 | 1734 | unsigned int fcoe_ddp_xid; |
5bc1421e | 1735 | #endif |
86f8515f | 1736 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1737 | struct netprio_map __rcu *priomap; |
4d288d57 | 1738 | #endif |
c1f19b51 | 1739 | struct phy_device *phydev; |
23d3b8bf | 1740 | struct lock_class_key *qdisc_tx_busylock; |
cbda10fa | 1741 | int group; |
9136461a | 1742 | struct pm_qos_request pm_qos_req; |
1da177e4 | 1743 | }; |
43cb76d9 | 1744 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1745 | |
1746 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1747 | |
4f57c087 JF |
1748 | static inline |
1749 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1750 | { | |
1751 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1752 | } | |
1753 | ||
1754 | static inline | |
1755 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1756 | { | |
1757 | if (tc >= dev->num_tc) | |
1758 | return -EINVAL; | |
1759 | ||
1760 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1761 | return 0; | |
1762 | } | |
1763 | ||
1764 | static inline | |
1765 | void netdev_reset_tc(struct net_device *dev) | |
1766 | { | |
1767 | dev->num_tc = 0; | |
1768 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1769 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1770 | } | |
1771 | ||
1772 | static inline | |
1773 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1774 | { | |
1775 | if (tc >= dev->num_tc) | |
1776 | return -EINVAL; | |
1777 | ||
1778 | dev->tc_to_txq[tc].count = count; | |
1779 | dev->tc_to_txq[tc].offset = offset; | |
1780 | return 0; | |
1781 | } | |
1782 | ||
1783 | static inline | |
1784 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1785 | { | |
1786 | if (num_tc > TC_MAX_QUEUE) | |
1787 | return -EINVAL; | |
1788 | ||
1789 | dev->num_tc = num_tc; | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | static inline | |
1794 | int netdev_get_num_tc(struct net_device *dev) | |
1795 | { | |
1796 | return dev->num_tc; | |
1797 | } | |
1798 | ||
e8a0464c DM |
1799 | static inline |
1800 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1801 | unsigned int index) | |
1802 | { | |
1803 | return &dev->_tx[index]; | |
1804 | } | |
1805 | ||
10c51b56 DB |
1806 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
1807 | const struct sk_buff *skb) | |
1808 | { | |
1809 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); | |
1810 | } | |
1811 | ||
e8a0464c DM |
1812 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
1813 | void (*f)(struct net_device *, | |
1814 | struct netdev_queue *, | |
1815 | void *), | |
1816 | void *arg) | |
1817 | { | |
1818 | unsigned int i; | |
1819 | ||
1820 | for (i = 0; i < dev->num_tx_queues; i++) | |
1821 | f(dev, &dev->_tx[i], arg); | |
1822 | } | |
1823 | ||
f629d208 | 1824 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
1825 | struct sk_buff *skb, |
1826 | void *accel_priv); | |
8c4c49df | 1827 | |
c346dca1 YH |
1828 | /* |
1829 | * Net namespace inlines | |
1830 | */ | |
1831 | static inline | |
1832 | struct net *dev_net(const struct net_device *dev) | |
1833 | { | |
c2d9ba9b | 1834 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1835 | } |
1836 | ||
1837 | static inline | |
f5aa23fd | 1838 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 | 1839 | { |
0c5c9fb5 | 1840 | write_pnet(&dev->nd_net, net); |
c346dca1 YH |
1841 | } |
1842 | ||
3e8a72d1 | 1843 | static inline bool netdev_uses_dsa(struct net_device *dev) |
cf85d08f | 1844 | { |
3fc88677 | 1845 | #if IS_ENABLED(CONFIG_NET_DSA) |
5aed85ce FF |
1846 | if (dev->dsa_ptr != NULL) |
1847 | return dsa_uses_tagged_protocol(dev->dsa_ptr); | |
396138f0 | 1848 | #endif |
5aed85ce | 1849 | return false; |
396138f0 LB |
1850 | } |
1851 | ||
bea3348e SH |
1852 | /** |
1853 | * netdev_priv - access network device private data | |
1854 | * @dev: network device | |
1855 | * | |
1856 | * Get network device private data | |
1857 | */ | |
6472ce60 | 1858 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1859 | { |
1ce8e7b5 | 1860 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1861 | } |
1862 | ||
1da177e4 LT |
1863 | /* Set the sysfs physical device reference for the network logical device |
1864 | * if set prior to registration will cause a symlink during initialization. | |
1865 | */ | |
43cb76d9 | 1866 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1867 | |
384912ed | 1868 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 1869 | * fine-grained identification of different network device types. For |
384912ed MH |
1870 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
1871 | */ | |
1872 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1873 | ||
82dc3c63 ED |
1874 | /* Default NAPI poll() weight |
1875 | * Device drivers are strongly advised to not use bigger value | |
1876 | */ | |
1877 | #define NAPI_POLL_WEIGHT 64 | |
1878 | ||
3b582cc1 SH |
1879 | /** |
1880 | * netif_napi_add - initialize a napi context | |
1881 | * @dev: network device | |
1882 | * @napi: napi context | |
1883 | * @poll: polling function | |
1884 | * @weight: default weight | |
1885 | * | |
1886 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1887 | * *any* of the other napi related functions. | |
1888 | */ | |
d565b0a1 HX |
1889 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1890 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1891 | |
d8156534 AD |
1892 | /** |
1893 | * netif_napi_del - remove a napi context | |
1894 | * @napi: napi context | |
1895 | * | |
1896 | * netif_napi_del() removes a napi context from the network device napi list | |
1897 | */ | |
d565b0a1 HX |
1898 | void netif_napi_del(struct napi_struct *napi); |
1899 | ||
1900 | struct napi_gro_cb { | |
78a478d0 HX |
1901 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1902 | void *frag0; | |
1903 | ||
7489594c HX |
1904 | /* Length of frag0. */ |
1905 | unsigned int frag0_len; | |
1906 | ||
86911732 HX |
1907 | /* This indicates where we are processing relative to skb->data. */ |
1908 | int data_offset; | |
1909 | ||
d565b0a1 | 1910 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
1911 | u16 flush; |
1912 | ||
1913 | /* Save the IP ID here and check when we get to the transport layer */ | |
1914 | u16 flush_id; | |
d565b0a1 HX |
1915 | |
1916 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
1917 | u16 count; |
1918 | ||
15e2396d TH |
1919 | /* Start offset for remote checksum offload */ |
1920 | u16 gro_remcsum_start; | |
1921 | ||
2e71a6f8 ED |
1922 | /* jiffies when first packet was created/queued */ |
1923 | unsigned long age; | |
86347245 | 1924 | |
afe93325 | 1925 | /* Used in ipv6_gro_receive() and foo-over-udp */ |
b582ef09 OG |
1926 | u16 proto; |
1927 | ||
baa32ff4 TH |
1928 | /* This is non-zero if the packet may be of the same flow. */ |
1929 | u8 same_flow:1; | |
1930 | ||
b582ef09 | 1931 | /* Used in udp_gro_receive */ |
573e8fca TH |
1932 | u8 udp_mark:1; |
1933 | ||
1934 | /* GRO checksum is valid */ | |
1935 | u8 csum_valid:1; | |
1936 | ||
662880f4 TH |
1937 | /* Number of checksums via CHECKSUM_UNNECESSARY */ |
1938 | u8 csum_cnt:3; | |
c3c7c254 | 1939 | |
baa32ff4 TH |
1940 | /* Free the skb? */ |
1941 | u8 free:2; | |
1942 | #define NAPI_GRO_FREE 1 | |
1943 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
1944 | ||
efc98d08 TH |
1945 | /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
1946 | u8 is_ipv6:1; | |
1947 | ||
baa32ff4 TH |
1948 | /* 7 bit hole */ |
1949 | ||
bf5a755f JC |
1950 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
1951 | __wsum csum; | |
1952 | ||
c3c7c254 ED |
1953 | /* used in skb_gro_receive() slow path */ |
1954 | struct sk_buff *last; | |
d565b0a1 HX |
1955 | }; |
1956 | ||
1957 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1958 | |
1da177e4 | 1959 | struct packet_type { |
f2ccd8fa DM |
1960 | __be16 type; /* This is really htons(ether_type). */ |
1961 | struct net_device *dev; /* NULL is wildcarded here */ | |
1962 | int (*func) (struct sk_buff *, | |
1963 | struct net_device *, | |
1964 | struct packet_type *, | |
1965 | struct net_device *); | |
c0de08d0 EL |
1966 | bool (*id_match)(struct packet_type *ptype, |
1967 | struct sock *sk); | |
1da177e4 LT |
1968 | void *af_packet_priv; |
1969 | struct list_head list; | |
1970 | }; | |
1971 | ||
f191a1d1 | 1972 | struct offload_callbacks { |
576a30eb | 1973 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1974 | netdev_features_t features); |
d565b0a1 | 1975 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
a2b12f3c | 1976 | struct sk_buff *skb); |
299603e8 | 1977 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
1978 | }; |
1979 | ||
1980 | struct packet_offload { | |
1981 | __be16 type; /* This is really htons(ether_type). */ | |
1982 | struct offload_callbacks callbacks; | |
1983 | struct list_head list; | |
1da177e4 LT |
1984 | }; |
1985 | ||
a2b12f3c TH |
1986 | struct udp_offload; |
1987 | ||
1988 | struct udp_offload_callbacks { | |
1989 | struct sk_buff **(*gro_receive)(struct sk_buff **head, | |
1990 | struct sk_buff *skb, | |
1991 | struct udp_offload *uoff); | |
1992 | int (*gro_complete)(struct sk_buff *skb, | |
1993 | int nhoff, | |
1994 | struct udp_offload *uoff); | |
1995 | }; | |
1996 | ||
b582ef09 OG |
1997 | struct udp_offload { |
1998 | __be16 port; | |
afe93325 | 1999 | u8 ipproto; |
a2b12f3c | 2000 | struct udp_offload_callbacks callbacks; |
b582ef09 OG |
2001 | }; |
2002 | ||
8f84985f LR |
2003 | /* often modified stats are per cpu, other are shared (netdev->stats) */ |
2004 | struct pcpu_sw_netstats { | |
2005 | u64 rx_packets; | |
2006 | u64 rx_bytes; | |
2007 | u64 tx_packets; | |
2008 | u64 tx_bytes; | |
2009 | struct u64_stats_sync syncp; | |
2010 | }; | |
2011 | ||
1c213bd2 WC |
2012 | #define netdev_alloc_pcpu_stats(type) \ |
2013 | ({ \ | |
693350c2 | 2014 | typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \ |
1c213bd2 WC |
2015 | if (pcpu_stats) { \ |
2016 | int i; \ | |
2017 | for_each_possible_cpu(i) { \ | |
2018 | typeof(type) *stat; \ | |
2019 | stat = per_cpu_ptr(pcpu_stats, i); \ | |
2020 | u64_stats_init(&stat->syncp); \ | |
2021 | } \ | |
2022 | } \ | |
2023 | pcpu_stats; \ | |
2024 | }) | |
2025 | ||
1da177e4 LT |
2026 | #include <linux/notifier.h> |
2027 | ||
dcfe1421 AW |
2028 | /* netdevice notifier chain. Please remember to update the rtnetlink |
2029 | * notification exclusion list in rtnetlink_event() when adding new | |
2030 | * types. | |
2031 | */ | |
2032 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
2033 | #define NETDEV_DOWN 0x0002 | |
2034 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
2035 | detected a hardware crash and restarted | |
2036 | - we can use this eg to kick tcp sessions | |
2037 | once done */ | |
2038 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
2039 | #define NETDEV_REGISTER 0x0005 | |
2040 | #define NETDEV_UNREGISTER 0x0006 | |
1d486bfb | 2041 | #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */ |
dcfe1421 AW |
2042 | #define NETDEV_CHANGEADDR 0x0008 |
2043 | #define NETDEV_GOING_DOWN 0x0009 | |
2044 | #define NETDEV_CHANGENAME 0x000A | |
2045 | #define NETDEV_FEAT_CHANGE 0x000B | |
2046 | #define NETDEV_BONDING_FAILOVER 0x000C | |
2047 | #define NETDEV_PRE_UP 0x000D | |
2048 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
2049 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
2050 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 2051 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
2052 | #define NETDEV_RELEASE 0x0012 |
2053 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
2054 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 2055 | #define NETDEV_CHANGEUPPER 0x0015 |
4aa5dee4 | 2056 | #define NETDEV_RESEND_IGMP 0x0016 |
1d486bfb | 2057 | #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */ |
d4261e56 | 2058 | #define NETDEV_CHANGEINFODATA 0x0018 |
61bd3857 | 2059 | #define NETDEV_BONDING_INFO 0x0019 |
dcfe1421 | 2060 | |
f629d208 JP |
2061 | int register_netdevice_notifier(struct notifier_block *nb); |
2062 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
2063 | |
2064 | struct netdev_notifier_info { | |
2065 | struct net_device *dev; | |
2066 | }; | |
2067 | ||
be9efd36 JP |
2068 | struct netdev_notifier_change_info { |
2069 | struct netdev_notifier_info info; /* must be first */ | |
2070 | unsigned int flags_changed; | |
2071 | }; | |
2072 | ||
75538c2b CW |
2073 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2074 | struct net_device *dev) | |
2075 | { | |
2076 | info->dev = dev; | |
2077 | } | |
2078 | ||
351638e7 JP |
2079 | static inline struct net_device * |
2080 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
2081 | { | |
2082 | return info->dev; | |
2083 | } | |
2084 | ||
f629d208 | 2085 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
2086 | |
2087 | ||
1da177e4 LT |
2088 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2089 | ||
881d966b EB |
2090 | #define for_each_netdev(net, d) \ |
2091 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
2092 | #define for_each_netdev_reverse(net, d) \ |
2093 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
2094 | #define for_each_netdev_rcu(net, d) \ |
2095 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
2096 | #define for_each_netdev_safe(net, d, n) \ |
2097 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
2098 | #define for_each_netdev_continue(net, d) \ | |
2099 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 2100 | #define for_each_netdev_continue_rcu(net, d) \ |
2101 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 2102 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2103 | for_each_netdev_rcu(&init_net, slave) \ | |
4ccce02e | 2104 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
881d966b | 2105 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 2106 | |
a050c33f DL |
2107 | static inline struct net_device *next_net_device(struct net_device *dev) |
2108 | { | |
2109 | struct list_head *lh; | |
2110 | struct net *net; | |
2111 | ||
c346dca1 | 2112 | net = dev_net(dev); |
a050c33f DL |
2113 | lh = dev->dev_list.next; |
2114 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2115 | } | |
2116 | ||
ce81b76a ED |
2117 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2118 | { | |
2119 | struct list_head *lh; | |
2120 | struct net *net; | |
2121 | ||
2122 | net = dev_net(dev); | |
ccf43438 | 2123 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
2124 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2125 | } | |
2126 | ||
a050c33f DL |
2127 | static inline struct net_device *first_net_device(struct net *net) |
2128 | { | |
2129 | return list_empty(&net->dev_base_head) ? NULL : | |
2130 | net_device_entry(net->dev_base_head.next); | |
2131 | } | |
7562f876 | 2132 | |
ccf43438 ED |
2133 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2134 | { | |
2135 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
2136 | ||
2137 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2138 | } | |
2139 | ||
f629d208 JP |
2140 | int netdev_boot_setup_check(struct net_device *dev); |
2141 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
2142 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
2143 | const char *hwaddr); | |
2144 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2145 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2146 | void dev_add_pack(struct packet_type *pt); | |
2147 | void dev_remove_pack(struct packet_type *pt); | |
2148 | void __dev_remove_pack(struct packet_type *pt); | |
2149 | void dev_add_offload(struct packet_offload *po); | |
2150 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 | 2151 | |
6c555490 WC |
2152 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2153 | unsigned short mask); | |
f629d208 JP |
2154 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2155 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
2156 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
2157 | int dev_alloc_name(struct net_device *dev, const char *name); | |
2158 | int dev_open(struct net_device *dev); | |
2159 | int dev_close(struct net_device *dev); | |
99c4a26a | 2160 | int dev_close_many(struct list_head *head, bool unlink); |
f629d208 JP |
2161 | void dev_disable_lro(struct net_device *dev); |
2162 | int dev_loopback_xmit(struct sk_buff *newskb); | |
2163 | int dev_queue_xmit(struct sk_buff *skb); | |
f663dd9a | 2164 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
2165 | int register_netdevice(struct net_device *dev); |
2166 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
2167 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
2168 | static inline void unregister_netdevice(struct net_device *dev) |
2169 | { | |
2170 | unregister_netdevice_queue(dev, NULL); | |
2171 | } | |
2172 | ||
f629d208 JP |
2173 | int netdev_refcnt_read(const struct net_device *dev); |
2174 | void free_netdev(struct net_device *dev); | |
74d332c1 | 2175 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
2176 | void synchronize_net(void); |
2177 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 2178 | |
f629d208 JP |
2179 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
2180 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
2181 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
2182 | int netdev_get_name(struct net *net, char *name, int ifindex); | |
2183 | int dev_restart(struct net_device *dev); | |
f629d208 | 2184 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
2185 | |
2186 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
2187 | { | |
2188 | return NAPI_GRO_CB(skb)->data_offset; | |
2189 | } | |
2190 | ||
2191 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
2192 | { | |
2193 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
2194 | } | |
2195 | ||
2196 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
2197 | { | |
2198 | NAPI_GRO_CB(skb)->data_offset += len; | |
2199 | } | |
2200 | ||
a5b1cf28 HX |
2201 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2202 | unsigned int offset) | |
86911732 | 2203 | { |
a5b1cf28 HX |
2204 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2205 | } | |
78a478d0 | 2206 | |
a5b1cf28 HX |
2207 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2208 | { | |
2209 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2210 | } | |
78a478d0 | 2211 | |
a5b1cf28 HX |
2212 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2213 | unsigned int offset) | |
2214 | { | |
17dd759c HX |
2215 | if (!pskb_may_pull(skb, hlen)) |
2216 | return NULL; | |
2217 | ||
a5b1cf28 HX |
2218 | NAPI_GRO_CB(skb)->frag0 = NULL; |
2219 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 2220 | return skb->data + offset; |
86911732 | 2221 | } |
1da177e4 | 2222 | |
36e7b1b8 HX |
2223 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2224 | { | |
78d3fd0b HX |
2225 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2226 | skb_network_offset(skb); | |
36e7b1b8 HX |
2227 | } |
2228 | ||
bf5a755f JC |
2229 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2230 | const void *start, unsigned int len) | |
2231 | { | |
573e8fca | 2232 | if (NAPI_GRO_CB(skb)->csum_valid) |
bf5a755f JC |
2233 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
2234 | csum_partial(start, len, 0)); | |
2235 | } | |
2236 | ||
573e8fca TH |
2237 | /* GRO checksum functions. These are logical equivalents of the normal |
2238 | * checksum functions (in skbuff.h) except that they operate on the GRO | |
2239 | * offsets and fields in sk_buff. | |
2240 | */ | |
2241 | ||
2242 | __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); | |
2243 | ||
15e2396d TH |
2244 | static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
2245 | { | |
2246 | return (NAPI_GRO_CB(skb)->gro_remcsum_start - skb_headroom(skb) == | |
2247 | skb_gro_offset(skb)); | |
2248 | } | |
2249 | ||
573e8fca TH |
2250 | static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
2251 | bool zero_okay, | |
2252 | __sum16 check) | |
2253 | { | |
6edec0e6 TH |
2254 | return ((skb->ip_summed != CHECKSUM_PARTIAL || |
2255 | skb_checksum_start_offset(skb) < | |
2256 | skb_gro_offset(skb)) && | |
15e2396d | 2257 | !skb_at_gro_remcsum_start(skb) && |
662880f4 | 2258 | NAPI_GRO_CB(skb)->csum_cnt == 0 && |
573e8fca TH |
2259 | (!zero_okay || check)); |
2260 | } | |
2261 | ||
2262 | static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, | |
2263 | __wsum psum) | |
2264 | { | |
2265 | if (NAPI_GRO_CB(skb)->csum_valid && | |
2266 | !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) | |
2267 | return 0; | |
2268 | ||
2269 | NAPI_GRO_CB(skb)->csum = psum; | |
2270 | ||
2271 | return __skb_gro_checksum_complete(skb); | |
2272 | } | |
2273 | ||
573e8fca TH |
2274 | static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
2275 | { | |
662880f4 TH |
2276 | if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
2277 | /* Consume a checksum from CHECKSUM_UNNECESSARY */ | |
2278 | NAPI_GRO_CB(skb)->csum_cnt--; | |
2279 | } else { | |
2280 | /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we | |
2281 | * verified a new top level checksum or an encapsulated one | |
2282 | * during GRO. This saves work if we fallback to normal path. | |
2283 | */ | |
2284 | __skb_incr_checksum_unnecessary(skb); | |
573e8fca TH |
2285 | } |
2286 | } | |
2287 | ||
2288 | #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ | |
2289 | compute_pseudo) \ | |
2290 | ({ \ | |
2291 | __sum16 __ret = 0; \ | |
2292 | if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ | |
2293 | __ret = __skb_gro_checksum_validate_complete(skb, \ | |
2294 | compute_pseudo(skb, proto)); \ | |
5a212329 TH |
2295 | if (__ret) \ |
2296 | __skb_mark_checksum_bad(skb); \ | |
2297 | else \ | |
573e8fca TH |
2298 | skb_gro_incr_csum_unnecessary(skb); \ |
2299 | __ret; \ | |
2300 | }) | |
2301 | ||
2302 | #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ | |
2303 | __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) | |
2304 | ||
2305 | #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ | |
2306 | compute_pseudo) \ | |
2307 | __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) | |
2308 | ||
2309 | #define skb_gro_checksum_simple_validate(skb) \ | |
2310 | __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) | |
2311 | ||
d96535a1 TH |
2312 | static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
2313 | { | |
2314 | return (NAPI_GRO_CB(skb)->csum_cnt == 0 && | |
2315 | !NAPI_GRO_CB(skb)->csum_valid); | |
2316 | } | |
2317 | ||
2318 | static inline void __skb_gro_checksum_convert(struct sk_buff *skb, | |
2319 | __sum16 check, __wsum pseudo) | |
2320 | { | |
2321 | NAPI_GRO_CB(skb)->csum = ~pseudo; | |
2322 | NAPI_GRO_CB(skb)->csum_valid = 1; | |
2323 | } | |
2324 | ||
2325 | #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \ | |
2326 | do { \ | |
2327 | if (__skb_gro_checksum_convert_check(skb)) \ | |
2328 | __skb_gro_checksum_convert(skb, check, \ | |
2329 | compute_pseudo(skb, proto)); \ | |
2330 | } while (0) | |
2331 | ||
26c4f7da TH |
2332 | struct gro_remcsum { |
2333 | int offset; | |
2334 | __wsum delta; | |
2335 | }; | |
2336 | ||
2337 | static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) | |
2338 | { | |
846cd667 | 2339 | grc->offset = 0; |
26c4f7da TH |
2340 | grc->delta = 0; |
2341 | } | |
2342 | ||
dcdc8994 | 2343 | static inline void skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, |
26c4f7da | 2344 | int start, int offset, |
15e2396d TH |
2345 | struct gro_remcsum *grc, |
2346 | bool nopartial) | |
dcdc8994 TH |
2347 | { |
2348 | __wsum delta; | |
2349 | ||
2350 | BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); | |
2351 | ||
15e2396d TH |
2352 | if (!nopartial) { |
2353 | NAPI_GRO_CB(skb)->gro_remcsum_start = | |
2354 | ((unsigned char *)ptr + start) - skb->head; | |
2355 | return; | |
2356 | } | |
2357 | ||
dcdc8994 TH |
2358 | delta = remcsum_adjust(ptr, NAPI_GRO_CB(skb)->csum, start, offset); |
2359 | ||
2360 | /* Adjust skb->csum since we changed the packet */ | |
dcdc8994 | 2361 | NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
26c4f7da TH |
2362 | |
2363 | grc->offset = (ptr + offset) - (void *)skb->head; | |
2364 | grc->delta = delta; | |
dcdc8994 TH |
2365 | } |
2366 | ||
26c4f7da TH |
2367 | static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
2368 | struct gro_remcsum *grc) | |
2369 | { | |
2370 | if (!grc->delta) | |
2371 | return; | |
2372 | ||
2373 | remcsum_unadjust((__sum16 *)(skb->head + grc->offset), grc->delta); | |
2374 | } | |
dcdc8994 | 2375 | |
0c4e8581 SH |
2376 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2377 | unsigned short type, | |
3b04ddde | 2378 | const void *daddr, const void *saddr, |
95c96174 | 2379 | unsigned int len) |
0c4e8581 | 2380 | { |
f1ecfd5d | 2381 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2382 | return 0; |
3b04ddde SH |
2383 | |
2384 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2385 | } |
2386 | ||
b95cce35 SH |
2387 | static inline int dev_parse_header(const struct sk_buff *skb, |
2388 | unsigned char *haddr) | |
2389 | { | |
2390 | const struct net_device *dev = skb->dev; | |
2391 | ||
1b83336b | 2392 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2393 | return 0; |
3b04ddde | 2394 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2395 | } |
2396 | ||
1da177e4 | 2397 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
f629d208 | 2398 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2399 | static inline int unregister_gifconf(unsigned int family) |
2400 | { | |
2401 | return register_gifconf(family, NULL); | |
2402 | } | |
2403 | ||
99bbc707 | 2404 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2405 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2406 | struct sd_flow_limit { |
2407 | u64 count; | |
2408 | unsigned int num_buckets; | |
2409 | unsigned int history_head; | |
2410 | u16 history[FLOW_LIMIT_HISTORY]; | |
2411 | u8 buckets[]; | |
2412 | }; | |
2413 | ||
2414 | extern int netdev_flow_limit_table_len; | |
2415 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2416 | ||
1da177e4 | 2417 | /* |
88751275 | 2418 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 2419 | */ |
d94d9fee | 2420 | struct softnet_data { |
1da177e4 | 2421 | struct list_head poll_list; |
6e7676c1 | 2422 | struct sk_buff_head process_queue; |
1da177e4 | 2423 | |
dee42870 | 2424 | /* stats */ |
cd7b5396 DM |
2425 | unsigned int processed; |
2426 | unsigned int time_squeeze; | |
2427 | unsigned int cpu_collision; | |
2428 | unsigned int received_rps; | |
fd793d89 | 2429 | #ifdef CONFIG_RPS |
88751275 | 2430 | struct softnet_data *rps_ipi_list; |
4cdb1e2e ED |
2431 | #endif |
2432 | #ifdef CONFIG_NET_FLOW_LIMIT | |
2433 | struct sd_flow_limit __rcu *flow_limit; | |
2434 | #endif | |
2435 | struct Qdisc *output_queue; | |
2436 | struct Qdisc **output_queue_tailp; | |
2437 | struct sk_buff *completion_queue; | |
88751275 | 2438 | |
4cdb1e2e | 2439 | #ifdef CONFIG_RPS |
88751275 | 2440 | /* Elements below can be accessed between CPUs for RPS */ |
0a9627f2 | 2441 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
2442 | struct softnet_data *rps_ipi_next; |
2443 | unsigned int cpu; | |
fec5e652 | 2444 | unsigned int input_queue_head; |
76cc8b13 | 2445 | unsigned int input_queue_tail; |
1e94d72f | 2446 | #endif |
95c96174 | 2447 | unsigned int dropped; |
0a9627f2 | 2448 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2449 | struct napi_struct backlog; |
99bbc707 | 2450 | |
1da177e4 LT |
2451 | }; |
2452 | ||
76cc8b13 | 2453 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2454 | { |
2455 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2456 | sd->input_queue_head++; |
2457 | #endif | |
2458 | } | |
2459 | ||
2460 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2461 | unsigned int *qtail) | |
2462 | { | |
2463 | #ifdef CONFIG_RPS | |
2464 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2465 | #endif |
2466 | } | |
2467 | ||
0a9627f2 | 2468 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2469 | |
f629d208 | 2470 | void __netif_schedule(struct Qdisc *q); |
46e5da40 | 2471 | void netif_schedule_queue(struct netdev_queue *txq); |
86d804e1 | 2472 | |
fd2ea0a7 DM |
2473 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2474 | { | |
2475 | unsigned int i; | |
2476 | ||
2477 | for (i = 0; i < dev->num_tx_queues; i++) | |
2478 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2479 | } | |
2480 | ||
d29f749e DJ |
2481 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
2482 | { | |
73466498 | 2483 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2484 | } |
2485 | ||
bea3348e SH |
2486 | /** |
2487 | * netif_start_queue - allow transmit | |
2488 | * @dev: network device | |
2489 | * | |
2490 | * Allow upper layers to call the device hard_start_xmit routine. | |
2491 | */ | |
1da177e4 LT |
2492 | static inline void netif_start_queue(struct net_device *dev) |
2493 | { | |
e8a0464c | 2494 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2495 | } |
2496 | ||
fd2ea0a7 DM |
2497 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2498 | { | |
2499 | unsigned int i; | |
2500 | ||
2501 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2502 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2503 | netif_tx_start_queue(txq); | |
2504 | } | |
2505 | } | |
2506 | ||
46e5da40 | 2507 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
79d16385 | 2508 | |
d29f749e DJ |
2509 | /** |
2510 | * netif_wake_queue - restart transmit | |
2511 | * @dev: network device | |
2512 | * | |
2513 | * Allow upper layers to call the device hard_start_xmit routine. | |
2514 | * Used for flow control when transmit resources are available. | |
2515 | */ | |
79d16385 DM |
2516 | static inline void netif_wake_queue(struct net_device *dev) |
2517 | { | |
e8a0464c | 2518 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2519 | } |
2520 | ||
fd2ea0a7 DM |
2521 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2522 | { | |
2523 | unsigned int i; | |
2524 | ||
2525 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2526 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2527 | netif_tx_wake_queue(txq); | |
2528 | } | |
2529 | } | |
2530 | ||
d29f749e DJ |
2531 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
2532 | { | |
18543a64 | 2533 | if (WARN_ON(!dev_queue)) { |
256ee435 | 2534 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
2535 | return; |
2536 | } | |
73466498 | 2537 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2538 | } |
2539 | ||
bea3348e SH |
2540 | /** |
2541 | * netif_stop_queue - stop transmitted packets | |
2542 | * @dev: network device | |
2543 | * | |
2544 | * Stop upper layers calling the device hard_start_xmit routine. | |
2545 | * Used for flow control when transmit resources are unavailable. | |
2546 | */ | |
1da177e4 LT |
2547 | static inline void netif_stop_queue(struct net_device *dev) |
2548 | { | |
e8a0464c | 2549 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2550 | } |
2551 | ||
fd2ea0a7 DM |
2552 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
2553 | { | |
2554 | unsigned int i; | |
2555 | ||
2556 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2557 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2558 | netif_tx_stop_queue(txq); | |
2559 | } | |
2560 | } | |
2561 | ||
4d29515f | 2562 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2563 | { |
73466498 | 2564 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2565 | } |
2566 | ||
bea3348e SH |
2567 | /** |
2568 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2569 | * @dev: network device | |
2570 | * | |
2571 | * Test if transmit queue on device is currently unable to send. | |
2572 | */ | |
4d29515f | 2573 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2574 | { |
e8a0464c | 2575 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2576 | } |
2577 | ||
4d29515f | 2578 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2579 | { |
73466498 TH |
2580 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2581 | } | |
2582 | ||
8e2f1a63 DB |
2583 | static inline bool |
2584 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
2585 | { |
2586 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2587 | } | |
2588 | ||
8e2f1a63 DB |
2589 | static inline bool |
2590 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
2591 | { | |
2592 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
2593 | } | |
2594 | ||
53511453 ED |
2595 | /** |
2596 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write | |
2597 | * @dev_queue: pointer to transmit queue | |
2598 | * | |
2599 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), | |
2600 | * to give appropriate hint to the cpu. | |
2601 | */ | |
2602 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) | |
2603 | { | |
2604 | #ifdef CONFIG_BQL | |
2605 | prefetchw(&dev_queue->dql.num_queued); | |
2606 | #endif | |
2607 | } | |
2608 | ||
2609 | /** | |
2610 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write | |
2611 | * @dev_queue: pointer to transmit queue | |
2612 | * | |
2613 | * BQL enabled drivers might use this helper in their TX completion path, | |
2614 | * to give appropriate hint to the cpu. | |
2615 | */ | |
2616 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) | |
2617 | { | |
2618 | #ifdef CONFIG_BQL | |
2619 | prefetchw(&dev_queue->dql.limit); | |
2620 | #endif | |
2621 | } | |
2622 | ||
c5d67bd7 TH |
2623 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2624 | unsigned int bytes) | |
2625 | { | |
114cf580 TH |
2626 | #ifdef CONFIG_BQL |
2627 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2628 | |
2629 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2630 | return; | |
2631 | ||
2632 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2633 | ||
2634 | /* | |
2635 | * The XOFF flag must be set before checking the dql_avail below, | |
2636 | * because in netdev_tx_completed_queue we update the dql_completed | |
2637 | * before checking the XOFF flag. | |
2638 | */ | |
2639 | smp_mb(); | |
2640 | ||
2641 | /* check again in case another CPU has just made room avail */ | |
2642 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2643 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2644 | #endif |
c5d67bd7 TH |
2645 | } |
2646 | ||
0042d0c8 FF |
2647 | /** |
2648 | * netdev_sent_queue - report the number of bytes queued to hardware | |
2649 | * @dev: network device | |
2650 | * @bytes: number of bytes queued to the hardware device queue | |
2651 | * | |
2652 | * Report the number of bytes queued for sending/completion to the network | |
2653 | * device hardware queue. @bytes should be a good approximation and should | |
2654 | * exactly match netdev_completed_queue() @bytes | |
2655 | */ | |
c5d67bd7 TH |
2656 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2657 | { | |
2658 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2659 | } | |
2660 | ||
2661 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2662 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2663 | { |
114cf580 | 2664 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2665 | if (unlikely(!bytes)) |
2666 | return; | |
2667 | ||
2668 | dql_completed(&dev_queue->dql, bytes); | |
2669 | ||
2670 | /* | |
2671 | * Without the memory barrier there is a small possiblity that | |
2672 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2673 | * be stopped forever | |
2674 | */ | |
2675 | smp_mb(); | |
2676 | ||
2677 | if (dql_avail(&dev_queue->dql) < 0) | |
2678 | return; | |
2679 | ||
2680 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2681 | netif_schedule_queue(dev_queue); | |
114cf580 | 2682 | #endif |
c5d67bd7 TH |
2683 | } |
2684 | ||
0042d0c8 FF |
2685 | /** |
2686 | * netdev_completed_queue - report bytes and packets completed by device | |
2687 | * @dev: network device | |
2688 | * @pkts: actual number of packets sent over the medium | |
2689 | * @bytes: actual number of bytes sent over the medium | |
2690 | * | |
2691 | * Report the number of bytes and packets transmitted by the network device | |
2692 | * hardware queue over the physical medium, @bytes must exactly match the | |
2693 | * @bytes amount passed to netdev_sent_queue() | |
2694 | */ | |
c5d67bd7 | 2695 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 2696 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2697 | { |
2698 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2699 | } | |
2700 | ||
2701 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
2702 | { | |
114cf580 | 2703 | #ifdef CONFIG_BQL |
5c490354 | 2704 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
2705 | dql_reset(&q->dql); |
2706 | #endif | |
c5d67bd7 TH |
2707 | } |
2708 | ||
0042d0c8 FF |
2709 | /** |
2710 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
2711 | * @dev_queue: network device | |
2712 | * | |
2713 | * Reset the bytes and packet count of a network device and clear the | |
2714 | * software flow control OFF bit for this network device | |
2715 | */ | |
c5d67bd7 TH |
2716 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
2717 | { | |
2718 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
2719 | } |
2720 | ||
b9507bda DB |
2721 | /** |
2722 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
2723 | * @dev: network device | |
2724 | * @queue_index: given tx queue index | |
2725 | * | |
2726 | * Returns 0 if given tx queue index >= number of device tx queues, | |
2727 | * otherwise returns the originally passed tx queue index. | |
2728 | */ | |
2729 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
2730 | { | |
2731 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
2732 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
2733 | dev->name, queue_index, | |
2734 | dev->real_num_tx_queues); | |
2735 | return 0; | |
2736 | } | |
2737 | ||
2738 | return queue_index; | |
2739 | } | |
2740 | ||
bea3348e SH |
2741 | /** |
2742 | * netif_running - test if up | |
2743 | * @dev: network device | |
2744 | * | |
2745 | * Test if the device has been brought up. | |
2746 | */ | |
4d29515f | 2747 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
2748 | { |
2749 | return test_bit(__LINK_STATE_START, &dev->state); | |
2750 | } | |
2751 | ||
f25f4e44 PWJ |
2752 | /* |
2753 | * Routines to manage the subqueues on a device. We only need start | |
2754 | * stop, and a check if it's stopped. All other device management is | |
2755 | * done at the overall netdevice level. | |
2756 | * Also test the device if we're multiqueue. | |
2757 | */ | |
bea3348e SH |
2758 | |
2759 | /** | |
2760 | * netif_start_subqueue - allow sending packets on subqueue | |
2761 | * @dev: network device | |
2762 | * @queue_index: sub queue index | |
2763 | * | |
2764 | * Start individual transmit queue of a device with multiple transmit queues. | |
2765 | */ | |
f25f4e44 PWJ |
2766 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2767 | { | |
fd2ea0a7 | 2768 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2769 | |
2770 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
2771 | } |
2772 | ||
bea3348e SH |
2773 | /** |
2774 | * netif_stop_subqueue - stop sending packets on subqueue | |
2775 | * @dev: network device | |
2776 | * @queue_index: sub queue index | |
2777 | * | |
2778 | * Stop individual transmit queue of a device with multiple transmit queues. | |
2779 | */ | |
f25f4e44 PWJ |
2780 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2781 | { | |
fd2ea0a7 | 2782 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 2783 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
2784 | } |
2785 | ||
bea3348e SH |
2786 | /** |
2787 | * netif_subqueue_stopped - test status of subqueue | |
2788 | * @dev: network device | |
2789 | * @queue_index: sub queue index | |
2790 | * | |
2791 | * Check individual transmit queue of a device with multiple transmit queues. | |
2792 | */ | |
4d29515f DM |
2793 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2794 | u16 queue_index) | |
f25f4e44 | 2795 | { |
fd2ea0a7 | 2796 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2797 | |
2798 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
2799 | } |
2800 | ||
4d29515f DM |
2801 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2802 | struct sk_buff *skb) | |
668f895a PE |
2803 | { |
2804 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
2805 | } | |
bea3348e | 2806 | |
46e5da40 | 2807 | void netif_wake_subqueue(struct net_device *dev, u16 queue_index); |
f25f4e44 | 2808 | |
537c00de | 2809 | #ifdef CONFIG_XPS |
53af53ae | 2810 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 2811 | u16 index); |
537c00de AD |
2812 | #else |
2813 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 2814 | const struct cpumask *mask, |
537c00de AD |
2815 | u16 index) |
2816 | { | |
2817 | return 0; | |
2818 | } | |
2819 | #endif | |
2820 | ||
a3d22a68 VZ |
2821 | /* |
2822 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
2823 | * as a distribution range limit for the returned value. | |
2824 | */ | |
2825 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
0e001614 | 2826 | struct sk_buff *skb) |
a3d22a68 VZ |
2827 | { |
2828 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
2829 | } | |
2830 | ||
bea3348e SH |
2831 | /** |
2832 | * netif_is_multiqueue - test if device has multiple transmit queues | |
2833 | * @dev: network device | |
2834 | * | |
2835 | * Check if device has multiple transmit queues | |
bea3348e | 2836 | */ |
4d29515f | 2837 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 2838 | { |
a02cec21 | 2839 | return dev->num_tx_queues > 1; |
f25f4e44 | 2840 | } |
1da177e4 | 2841 | |
f629d208 | 2842 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 2843 | |
a953be53 | 2844 | #ifdef CONFIG_SYSFS |
f629d208 | 2845 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
2846 | #else |
2847 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
2848 | unsigned int rxq) | |
2849 | { | |
2850 | return 0; | |
2851 | } | |
2852 | #endif | |
2853 | ||
a953be53 MD |
2854 | #ifdef CONFIG_SYSFS |
2855 | static inline unsigned int get_netdev_rx_queue_index( | |
2856 | struct netdev_rx_queue *queue) | |
2857 | { | |
2858 | struct net_device *dev = queue->dev; | |
2859 | int index = queue - dev->_rx; | |
2860 | ||
2861 | BUG_ON(index >= dev->num_rx_queues); | |
2862 | return index; | |
2863 | } | |
2864 | #endif | |
2865 | ||
16917b87 | 2866 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 2867 | int netif_get_num_default_rss_queues(void); |
16917b87 | 2868 | |
e6247027 ED |
2869 | enum skb_free_reason { |
2870 | SKB_REASON_CONSUMED, | |
2871 | SKB_REASON_DROPPED, | |
2872 | }; | |
2873 | ||
2874 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
2875 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 2876 | |
e6247027 ED |
2877 | /* |
2878 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
2879 | * interrupt context or with hardware interrupts being disabled. | |
2880 | * (in_irq() || irqs_disabled()) | |
2881 | * | |
2882 | * We provide four helpers that can be used in following contexts : | |
2883 | * | |
2884 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
2885 | * replacing kfree_skb(skb) | |
2886 | * | |
2887 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
2888 | * Typically used in place of consume_skb(skb) in TX completion path | |
2889 | * | |
2890 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
2891 | * replacing kfree_skb(skb) | |
2892 | * | |
2893 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
2894 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 2895 | */ |
e6247027 ED |
2896 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
2897 | { | |
2898 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
2899 | } | |
2900 | ||
2901 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
2902 | { | |
2903 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
2904 | } | |
2905 | ||
2906 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
2907 | { | |
2908 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
2909 | } | |
2910 | ||
2911 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
2912 | { | |
2913 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
2914 | } | |
1da177e4 | 2915 | |
f629d208 JP |
2916 | int netif_rx(struct sk_buff *skb); |
2917 | int netif_rx_ni(struct sk_buff *skb); | |
2918 | int netif_receive_skb(struct sk_buff *skb); | |
2919 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); | |
2920 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
2921 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
2922 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
2923 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
2924 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
2925 | |
2926 | static inline void napi_free_frags(struct napi_struct *napi) | |
2927 | { | |
2928 | kfree_skb(napi->skb); | |
2929 | napi->skb = NULL; | |
2930 | } | |
2931 | ||
f629d208 JP |
2932 | int netdev_rx_handler_register(struct net_device *dev, |
2933 | rx_handler_func_t *rx_handler, | |
2934 | void *rx_handler_data); | |
2935 | void netdev_rx_handler_unregister(struct net_device *dev); | |
2936 | ||
2937 | bool dev_valid_name(const char *name); | |
2938 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
2939 | int dev_ethtool(struct net *net, struct ifreq *); | |
2940 | unsigned int dev_get_flags(const struct net_device *); | |
2941 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
2942 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
2943 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
2944 | unsigned int gchanges); | |
f629d208 JP |
2945 | int dev_change_name(struct net_device *, const char *); |
2946 | int dev_set_alias(struct net_device *, const char *, size_t); | |
2947 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); | |
2948 | int dev_set_mtu(struct net_device *, int); | |
2949 | void dev_set_group(struct net_device *, int); | |
2950 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
2951 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
2952 | int dev_get_phys_port_id(struct net_device *dev, | |
02637fce | 2953 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
2954 | int dev_get_phys_port_name(struct net_device *dev, |
2955 | char *name, size_t len); | |
55a93b3e | 2956 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev); |
ce93718f DM |
2957 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
2958 | struct netdev_queue *txq, int *ret); | |
a0265d28 | 2959 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 2960 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
1ee481fb | 2961 | bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb); |
1da177e4 | 2962 | |
20380731 | 2963 | extern int netdev_budget; |
1da177e4 LT |
2964 | |
2965 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 2966 | void netdev_run_todo(void); |
1da177e4 | 2967 | |
bea3348e SH |
2968 | /** |
2969 | * dev_put - release reference to device | |
2970 | * @dev: network device | |
2971 | * | |
9ef4429b | 2972 | * Release reference to device to allow it to be freed. |
bea3348e | 2973 | */ |
1da177e4 LT |
2974 | static inline void dev_put(struct net_device *dev) |
2975 | { | |
933393f5 | 2976 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2977 | } |
2978 | ||
bea3348e SH |
2979 | /** |
2980 | * dev_hold - get reference to device | |
2981 | * @dev: network device | |
2982 | * | |
9ef4429b | 2983 | * Hold reference to device to keep it from being freed. |
bea3348e | 2984 | */ |
15333061 SH |
2985 | static inline void dev_hold(struct net_device *dev) |
2986 | { | |
933393f5 | 2987 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2988 | } |
1da177e4 LT |
2989 | |
2990 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2991 | * and _off may be called from IRQ context, but it is caller | |
2992 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2993 | * |
2994 | * The name carrier is inappropriate, these functions should really be | |
2995 | * called netif_lowerlayer_*() because they represent the state of any | |
2996 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2997 | */ |
2998 | ||
f629d208 JP |
2999 | void linkwatch_init_dev(struct net_device *dev); |
3000 | void linkwatch_fire_event(struct net_device *dev); | |
3001 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 3002 | |
bea3348e SH |
3003 | /** |
3004 | * netif_carrier_ok - test if carrier present | |
3005 | * @dev: network device | |
3006 | * | |
3007 | * Check if carrier is present on device | |
3008 | */ | |
4d29515f | 3009 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
3010 | { |
3011 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
3012 | } | |
3013 | ||
f629d208 | 3014 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 3015 | |
f629d208 | 3016 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 3017 | |
f629d208 | 3018 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 3019 | |
f629d208 | 3020 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 3021 | |
bea3348e SH |
3022 | /** |
3023 | * netif_dormant_on - mark device as dormant. | |
3024 | * @dev: network device | |
3025 | * | |
3026 | * Mark device as dormant (as per RFC2863). | |
3027 | * | |
3028 | * The dormant state indicates that the relevant interface is not | |
3029 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
3030 | * in a "pending" state, waiting for some external event. For "on- | |
3031 | * demand" interfaces, this new state identifies the situation where the | |
3032 | * interface is waiting for events to place it in the up state. | |
3033 | * | |
3034 | */ | |
b00055aa SR |
3035 | static inline void netif_dormant_on(struct net_device *dev) |
3036 | { | |
3037 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3038 | linkwatch_fire_event(dev); | |
3039 | } | |
3040 | ||
bea3348e SH |
3041 | /** |
3042 | * netif_dormant_off - set device as not dormant. | |
3043 | * @dev: network device | |
3044 | * | |
3045 | * Device is not in dormant state. | |
3046 | */ | |
b00055aa SR |
3047 | static inline void netif_dormant_off(struct net_device *dev) |
3048 | { | |
3049 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3050 | linkwatch_fire_event(dev); | |
3051 | } | |
3052 | ||
bea3348e SH |
3053 | /** |
3054 | * netif_dormant - test if carrier present | |
3055 | * @dev: network device | |
3056 | * | |
3057 | * Check if carrier is present on device | |
3058 | */ | |
4d29515f | 3059 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
3060 | { |
3061 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
3062 | } | |
3063 | ||
3064 | ||
bea3348e SH |
3065 | /** |
3066 | * netif_oper_up - test if device is operational | |
3067 | * @dev: network device | |
3068 | * | |
3069 | * Check if carrier is operational | |
3070 | */ | |
4d29515f | 3071 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 3072 | { |
b00055aa SR |
3073 | return (dev->operstate == IF_OPER_UP || |
3074 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
3075 | } | |
3076 | ||
bea3348e SH |
3077 | /** |
3078 | * netif_device_present - is device available or removed | |
3079 | * @dev: network device | |
3080 | * | |
3081 | * Check if device has not been removed from system. | |
3082 | */ | |
4d29515f | 3083 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
3084 | { |
3085 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
3086 | } | |
3087 | ||
f629d208 | 3088 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 3089 | |
f629d208 | 3090 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
3091 | |
3092 | /* | |
3093 | * Network interface message level settings | |
3094 | */ | |
1da177e4 LT |
3095 | |
3096 | enum { | |
3097 | NETIF_MSG_DRV = 0x0001, | |
3098 | NETIF_MSG_PROBE = 0x0002, | |
3099 | NETIF_MSG_LINK = 0x0004, | |
3100 | NETIF_MSG_TIMER = 0x0008, | |
3101 | NETIF_MSG_IFDOWN = 0x0010, | |
3102 | NETIF_MSG_IFUP = 0x0020, | |
3103 | NETIF_MSG_RX_ERR = 0x0040, | |
3104 | NETIF_MSG_TX_ERR = 0x0080, | |
3105 | NETIF_MSG_TX_QUEUED = 0x0100, | |
3106 | NETIF_MSG_INTR = 0x0200, | |
3107 | NETIF_MSG_TX_DONE = 0x0400, | |
3108 | NETIF_MSG_RX_STATUS = 0x0800, | |
3109 | NETIF_MSG_PKTDATA = 0x1000, | |
3110 | NETIF_MSG_HW = 0x2000, | |
3111 | NETIF_MSG_WOL = 0x4000, | |
3112 | }; | |
3113 | ||
3114 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
3115 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
3116 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
3117 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
3118 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
3119 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
3120 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
3121 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
3122 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
3123 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
3124 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
3125 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
3126 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
3127 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
3128 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
3129 | ||
3130 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
3131 | { | |
3132 | /* use default */ | |
3133 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
3134 | return default_msg_enable_bits; | |
3135 | if (debug_value == 0) /* no output */ | |
3136 | return 0; | |
3137 | /* set low N bits */ | |
3138 | return (1 << debug_value) - 1; | |
3139 | } | |
3140 | ||
c773e847 | 3141 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 3142 | { |
c773e847 DM |
3143 | spin_lock(&txq->_xmit_lock); |
3144 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
3145 | } |
3146 | ||
fd2ea0a7 DM |
3147 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
3148 | { | |
3149 | spin_lock_bh(&txq->_xmit_lock); | |
3150 | txq->xmit_lock_owner = smp_processor_id(); | |
3151 | } | |
3152 | ||
4d29515f | 3153 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 3154 | { |
4d29515f | 3155 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
3156 | if (likely(ok)) |
3157 | txq->xmit_lock_owner = smp_processor_id(); | |
3158 | return ok; | |
3159 | } | |
3160 | ||
3161 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
3162 | { | |
3163 | txq->xmit_lock_owner = -1; | |
3164 | spin_unlock(&txq->_xmit_lock); | |
3165 | } | |
3166 | ||
3167 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
3168 | { | |
3169 | txq->xmit_lock_owner = -1; | |
3170 | spin_unlock_bh(&txq->_xmit_lock); | |
3171 | } | |
3172 | ||
08baf561 ED |
3173 | static inline void txq_trans_update(struct netdev_queue *txq) |
3174 | { | |
3175 | if (txq->xmit_lock_owner != -1) | |
3176 | txq->trans_start = jiffies; | |
3177 | } | |
3178 | ||
d29f749e DJ |
3179 | /** |
3180 | * netif_tx_lock - grab network device transmit lock | |
3181 | * @dev: network device | |
d29f749e DJ |
3182 | * |
3183 | * Get network device transmit lock | |
3184 | */ | |
22dd7495 JHS |
3185 | static inline void netif_tx_lock(struct net_device *dev) |
3186 | { | |
e8a0464c | 3187 | unsigned int i; |
c3f26a26 | 3188 | int cpu; |
c773e847 | 3189 | |
c3f26a26 DM |
3190 | spin_lock(&dev->tx_global_lock); |
3191 | cpu = smp_processor_id(); | |
e8a0464c DM |
3192 | for (i = 0; i < dev->num_tx_queues; i++) { |
3193 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3194 | |
3195 | /* We are the only thread of execution doing a | |
3196 | * freeze, but we have to grab the _xmit_lock in | |
3197 | * order to synchronize with threads which are in | |
3198 | * the ->hard_start_xmit() handler and already | |
3199 | * checked the frozen bit. | |
3200 | */ | |
e8a0464c | 3201 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
3202 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
3203 | __netif_tx_unlock(txq); | |
e8a0464c | 3204 | } |
932ff279 HX |
3205 | } |
3206 | ||
3207 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
3208 | { | |
e8a0464c DM |
3209 | local_bh_disable(); |
3210 | netif_tx_lock(dev); | |
932ff279 HX |
3211 | } |
3212 | ||
932ff279 HX |
3213 | static inline void netif_tx_unlock(struct net_device *dev) |
3214 | { | |
e8a0464c DM |
3215 | unsigned int i; |
3216 | ||
3217 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3218 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 3219 | |
c3f26a26 DM |
3220 | /* No need to grab the _xmit_lock here. If the |
3221 | * queue is not stopped for another reason, we | |
3222 | * force a schedule. | |
3223 | */ | |
3224 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 3225 | netif_schedule_queue(txq); |
c3f26a26 DM |
3226 | } |
3227 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
3228 | } |
3229 | ||
3230 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
3231 | { | |
e8a0464c DM |
3232 | netif_tx_unlock(dev); |
3233 | local_bh_enable(); | |
932ff279 HX |
3234 | } |
3235 | ||
c773e847 | 3236 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 3237 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3238 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
3239 | } \ |
3240 | } | |
3241 | ||
5efeac44 EB |
3242 | #define HARD_TX_TRYLOCK(dev, txq) \ |
3243 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
3244 | __netif_tx_trylock(txq) : \ | |
3245 | true ) | |
3246 | ||
c773e847 | 3247 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 3248 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3249 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
3250 | } \ |
3251 | } | |
3252 | ||
1da177e4 LT |
3253 | static inline void netif_tx_disable(struct net_device *dev) |
3254 | { | |
fd2ea0a7 | 3255 | unsigned int i; |
c3f26a26 | 3256 | int cpu; |
fd2ea0a7 | 3257 | |
c3f26a26 DM |
3258 | local_bh_disable(); |
3259 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
3260 | for (i = 0; i < dev->num_tx_queues; i++) { |
3261 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3262 | |
3263 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 3264 | netif_tx_stop_queue(txq); |
c3f26a26 | 3265 | __netif_tx_unlock(txq); |
fd2ea0a7 | 3266 | } |
c3f26a26 | 3267 | local_bh_enable(); |
1da177e4 LT |
3268 | } |
3269 | ||
e308a5d8 DM |
3270 | static inline void netif_addr_lock(struct net_device *dev) |
3271 | { | |
3272 | spin_lock(&dev->addr_list_lock); | |
3273 | } | |
3274 | ||
2429f7ac JP |
3275 | static inline void netif_addr_lock_nested(struct net_device *dev) |
3276 | { | |
25175ba5 VY |
3277 | int subclass = SINGLE_DEPTH_NESTING; |
3278 | ||
3279 | if (dev->netdev_ops->ndo_get_lock_subclass) | |
3280 | subclass = dev->netdev_ops->ndo_get_lock_subclass(dev); | |
3281 | ||
3282 | spin_lock_nested(&dev->addr_list_lock, subclass); | |
2429f7ac JP |
3283 | } |
3284 | ||
e308a5d8 DM |
3285 | static inline void netif_addr_lock_bh(struct net_device *dev) |
3286 | { | |
3287 | spin_lock_bh(&dev->addr_list_lock); | |
3288 | } | |
3289 | ||
3290 | static inline void netif_addr_unlock(struct net_device *dev) | |
3291 | { | |
3292 | spin_unlock(&dev->addr_list_lock); | |
3293 | } | |
3294 | ||
3295 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
3296 | { | |
3297 | spin_unlock_bh(&dev->addr_list_lock); | |
3298 | } | |
3299 | ||
f001fde5 | 3300 | /* |
31278e71 | 3301 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
3302 | * rcu_read_lock held. |
3303 | */ | |
3304 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 3305 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 3306 | |
1da177e4 LT |
3307 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
3308 | ||
f629d208 | 3309 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
3310 | |
3311 | /* Support for loadable net-drivers */ | |
f629d208 | 3312 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
c835a677 | 3313 | unsigned char name_assign_type, |
f629d208 JP |
3314 | void (*setup)(struct net_device *), |
3315 | unsigned int txqs, unsigned int rxqs); | |
c835a677 TG |
3316 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
3317 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) | |
36909ea4 | 3318 | |
c835a677 TG |
3319 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
3320 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ | |
3321 | count) | |
36909ea4 | 3322 | |
f629d208 JP |
3323 | int register_netdev(struct net_device *dev); |
3324 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 3325 | |
22bedad3 | 3326 | /* General hardware address lists handling functions */ |
f629d208 JP |
3327 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
3328 | struct netdev_hw_addr_list *from_list, int addr_len); | |
3329 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
3330 | struct netdev_hw_addr_list *from_list, int addr_len); | |
670e5b8e AD |
3331 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
3332 | struct net_device *dev, | |
3333 | int (*sync)(struct net_device *, const unsigned char *), | |
3334 | int (*unsync)(struct net_device *, | |
3335 | const unsigned char *)); | |
3336 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, | |
3337 | struct net_device *dev, | |
3338 | int (*unsync)(struct net_device *, | |
3339 | const unsigned char *)); | |
f629d208 | 3340 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 3341 | |
f001fde5 | 3342 | /* Functions used for device addresses handling */ |
f629d208 JP |
3343 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
3344 | unsigned char addr_type); | |
3345 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
3346 | unsigned char addr_type); | |
f629d208 JP |
3347 | void dev_addr_flush(struct net_device *dev); |
3348 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
3349 | |
3350 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
3351 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3352 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3353 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3354 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3355 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3356 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3357 | void dev_uc_flush(struct net_device *dev); | |
3358 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3359 | |
670e5b8e AD |
3360 | /** |
3361 | * __dev_uc_sync - Synchonize device's unicast list | |
3362 | * @dev: device to sync | |
3363 | * @sync: function to call if address should be added | |
3364 | * @unsync: function to call if address should be removed | |
3365 | * | |
3366 | * Add newly added addresses to the interface, and release | |
3367 | * addresses that have been deleted. | |
3368 | **/ | |
3369 | static inline int __dev_uc_sync(struct net_device *dev, | |
3370 | int (*sync)(struct net_device *, | |
3371 | const unsigned char *), | |
3372 | int (*unsync)(struct net_device *, | |
3373 | const unsigned char *)) | |
3374 | { | |
3375 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); | |
3376 | } | |
3377 | ||
3378 | /** | |
e793c0f7 | 3379 | * __dev_uc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3380 | * @dev: device to sync |
3381 | * @unsync: function to call if address should be removed | |
3382 | * | |
3383 | * Remove all addresses that were added to the device by dev_uc_sync(). | |
3384 | **/ | |
3385 | static inline void __dev_uc_unsync(struct net_device *dev, | |
3386 | int (*unsync)(struct net_device *, | |
3387 | const unsigned char *)) | |
3388 | { | |
3389 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); | |
3390 | } | |
3391 | ||
22bedad3 | 3392 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3393 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3394 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3395 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3396 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3397 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3398 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3399 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3400 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3401 | void dev_mc_flush(struct net_device *dev); | |
3402 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3403 | |
670e5b8e AD |
3404 | /** |
3405 | * __dev_mc_sync - Synchonize device's multicast list | |
3406 | * @dev: device to sync | |
3407 | * @sync: function to call if address should be added | |
3408 | * @unsync: function to call if address should be removed | |
3409 | * | |
3410 | * Add newly added addresses to the interface, and release | |
3411 | * addresses that have been deleted. | |
3412 | **/ | |
3413 | static inline int __dev_mc_sync(struct net_device *dev, | |
3414 | int (*sync)(struct net_device *, | |
3415 | const unsigned char *), | |
3416 | int (*unsync)(struct net_device *, | |
3417 | const unsigned char *)) | |
3418 | { | |
3419 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); | |
3420 | } | |
3421 | ||
3422 | /** | |
e793c0f7 | 3423 | * __dev_mc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3424 | * @dev: device to sync |
3425 | * @unsync: function to call if address should be removed | |
3426 | * | |
3427 | * Remove all addresses that were added to the device by dev_mc_sync(). | |
3428 | **/ | |
3429 | static inline void __dev_mc_unsync(struct net_device *dev, | |
3430 | int (*unsync)(struct net_device *, | |
3431 | const unsigned char *)) | |
3432 | { | |
3433 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); | |
3434 | } | |
3435 | ||
4417da66 | 3436 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3437 | void dev_set_rx_mode(struct net_device *dev); |
3438 | void __dev_set_rx_mode(struct net_device *dev); | |
3439 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3440 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3441 | void netdev_state_change(struct net_device *dev); | |
3442 | void netdev_notify_peers(struct net_device *dev); | |
3443 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3444 | /* Load a device via the kmod */ |
f629d208 JP |
3445 | void dev_load(struct net *net, const char *name); |
3446 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3447 | struct rtnl_link_stats64 *storage); | |
3448 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3449 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3450 | |
1da177e4 | 3451 | extern int netdev_max_backlog; |
3b098e2d | 3452 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3453 | extern int weight_p; |
0a14842f | 3454 | extern int bpf_jit_enable; |
9ff162a8 | 3455 | |
f629d208 | 3456 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
44a40855 VY |
3457 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
3458 | struct list_head **iter); | |
f629d208 JP |
3459 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3460 | struct list_head **iter); | |
8b5be856 | 3461 | |
44a40855 VY |
3462 | /* iterate through upper list, must be called under RCU read lock */ |
3463 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ | |
3464 | for (iter = &(dev)->adj_list.upper, \ | |
3465 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3466 | updev; \ | |
3467 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) | |
3468 | ||
8b5be856 | 3469 | /* iterate through upper list, must be called under RCU read lock */ |
2f268f12 VF |
3470 | #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
3471 | for (iter = &(dev)->all_adj_list.upper, \ | |
3472 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3473 | updev; \ | |
3474 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) | |
8b5be856 | 3475 | |
f629d208 JP |
3476 | void *netdev_lower_get_next_private(struct net_device *dev, |
3477 | struct list_head **iter); | |
3478 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3479 | struct list_head **iter); | |
31088a11 VF |
3480 | |
3481 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3482 | for (iter = (dev)->adj_list.lower.next, \ | |
3483 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3484 | priv; \ | |
3485 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3486 | ||
3487 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3488 | for (iter = &(dev)->adj_list.lower, \ | |
3489 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3490 | priv; \ | |
3491 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3492 | ||
4085ebe8 VY |
3493 | void *netdev_lower_get_next(struct net_device *dev, |
3494 | struct list_head **iter); | |
3495 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ | |
3496 | for (iter = &(dev)->adj_list.lower, \ | |
3497 | ldev = netdev_lower_get_next(dev, &(iter)); \ | |
3498 | ldev; \ | |
3499 | ldev = netdev_lower_get_next(dev, &(iter))) | |
3500 | ||
f629d208 | 3501 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3502 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3503 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3504 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
3505 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); | |
3506 | int netdev_master_upper_dev_link(struct net_device *dev, | |
9ff162a8 | 3507 | struct net_device *upper_dev); |
f629d208 JP |
3508 | int netdev_master_upper_dev_link_private(struct net_device *dev, |
3509 | struct net_device *upper_dev, | |
3510 | void *private); | |
3511 | void netdev_upper_dev_unlink(struct net_device *dev, | |
3512 | struct net_device *upper_dev); | |
5bb025fa | 3513 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
3514 | void *netdev_lower_dev_get_private(struct net_device *dev, |
3515 | struct net_device *lower_dev); | |
960fb622 ED |
3516 | |
3517 | /* RSS keys are 40 or 52 bytes long */ | |
3518 | #define NETDEV_RSS_KEY_LEN 52 | |
3519 | extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN]; | |
3520 | void netdev_rss_key_fill(void *buffer, size_t len); | |
3521 | ||
4085ebe8 VY |
3522 | int dev_get_nest_level(struct net_device *dev, |
3523 | bool (*type_check)(struct net_device *dev)); | |
f629d208 JP |
3524 | int skb_checksum_help(struct sk_buff *skb); |
3525 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, | |
3526 | netdev_features_t features, bool tx_path); | |
3527 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
3528 | netdev_features_t features); | |
12b0004d | 3529 | |
61bd3857 MS |
3530 | struct netdev_bonding_info { |
3531 | ifslave slave; | |
3532 | ifbond master; | |
3533 | }; | |
3534 | ||
3535 | struct netdev_notifier_bonding_info { | |
3536 | struct netdev_notifier_info info; /* must be first */ | |
3537 | struct netdev_bonding_info bonding_info; | |
3538 | }; | |
3539 | ||
3540 | void netdev_bonding_info_change(struct net_device *dev, | |
3541 | struct netdev_bonding_info *bonding_info); | |
3542 | ||
12b0004d CW |
3543 | static inline |
3544 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
3545 | { | |
3546 | return __skb_gso_segment(skb, features, true); | |
3547 | } | |
53d6471c | 3548 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
3549 | |
3550 | static inline bool can_checksum_protocol(netdev_features_t features, | |
3551 | __be16 protocol) | |
3552 | { | |
3553 | return ((features & NETIF_F_GEN_CSUM) || | |
3554 | ((features & NETIF_F_V4_CSUM) && | |
3555 | protocol == htons(ETH_P_IP)) || | |
3556 | ((features & NETIF_F_V6_CSUM) && | |
3557 | protocol == htons(ETH_P_IPV6)) || | |
3558 | ((features & NETIF_F_FCOE_CRC) && | |
3559 | protocol == htons(ETH_P_FCOE))); | |
3560 | } | |
12b0004d | 3561 | |
fb286bb2 | 3562 | #ifdef CONFIG_BUG |
f629d208 | 3563 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
3564 | #else |
3565 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
3566 | { | |
3567 | } | |
3568 | #endif | |
1da177e4 | 3569 | /* rx skb timestamps */ |
f629d208 JP |
3570 | void net_enable_timestamp(void); |
3571 | void net_disable_timestamp(void); | |
1da177e4 | 3572 | |
20380731 | 3573 | #ifdef CONFIG_PROC_FS |
f629d208 | 3574 | int __init dev_proc_init(void); |
900ff8c6 CW |
3575 | #else |
3576 | #define dev_proc_init() 0 | |
20380731 ACM |
3577 | #endif |
3578 | ||
4798248e | 3579 | static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, |
fa2dbdc2 DM |
3580 | struct sk_buff *skb, struct net_device *dev, |
3581 | bool more) | |
4798248e | 3582 | { |
fa2dbdc2 | 3583 | skb->xmit_more = more ? 1 : 0; |
0b725a2c | 3584 | return ops->ndo_start_xmit(skb, dev); |
4798248e DM |
3585 | } |
3586 | ||
10b3ad8c | 3587 | static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, |
fa2dbdc2 | 3588 | struct netdev_queue *txq, bool more) |
4798248e DM |
3589 | { |
3590 | const struct net_device_ops *ops = dev->netdev_ops; | |
10b3ad8c | 3591 | int rc; |
4798248e | 3592 | |
fa2dbdc2 | 3593 | rc = __netdev_start_xmit(ops, skb, dev, more); |
10b3ad8c DM |
3594 | if (rc == NETDEV_TX_OK) |
3595 | txq_trans_update(txq); | |
3596 | ||
3597 | return rc; | |
4798248e DM |
3598 | } |
3599 | ||
42a2d923 LT |
3600 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
3601 | const void *ns); | |
3602 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, | |
3603 | const void *ns); | |
58292cbe TH |
3604 | |
3605 | static inline int netdev_class_create_file(struct class_attribute *class_attr) | |
3606 | { | |
3607 | return netdev_class_create_file_ns(class_attr, NULL); | |
3608 | } | |
3609 | ||
3610 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) | |
3611 | { | |
3612 | netdev_class_remove_file_ns(class_attr, NULL); | |
3613 | } | |
b8a9787e | 3614 | |
04600794 JB |
3615 | extern struct kobj_ns_type_operations net_ns_type_operations; |
3616 | ||
f629d208 | 3617 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 3618 | |
f629d208 | 3619 | void linkwatch_run_queue(void); |
20380731 | 3620 | |
da08143b MK |
3621 | static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, |
3622 | netdev_features_t f2) | |
3623 | { | |
3624 | if (f1 & NETIF_F_GEN_CSUM) | |
3625 | f1 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM); | |
3626 | if (f2 & NETIF_F_GEN_CSUM) | |
3627 | f2 |= (NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM); | |
3628 | f1 &= f2; | |
3629 | if (f1 & NETIF_F_GEN_CSUM) | |
3630 | f1 &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_GEN_CSUM); | |
3631 | ||
3632 | return f1; | |
3633 | } | |
3634 | ||
c8f44aff MM |
3635 | static inline netdev_features_t netdev_get_wanted_features( |
3636 | struct net_device *dev) | |
5455c699 MM |
3637 | { |
3638 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
3639 | } | |
c8f44aff MM |
3640 | netdev_features_t netdev_increment_features(netdev_features_t all, |
3641 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
3642 | |
3643 | /* Allow TSO being used on stacked device : | |
3644 | * Performing the GSO segmentation before last device | |
3645 | * is a performance improvement. | |
3646 | */ | |
3647 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
3648 | netdev_features_t mask) | |
3649 | { | |
3650 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
3651 | } | |
3652 | ||
6cb6a27c | 3653 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 3654 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 3655 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 3656 | |
fc4a7489 PM |
3657 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
3658 | struct net_device *dev); | |
3659 | ||
e38f3025 TM |
3660 | netdev_features_t passthru_features_check(struct sk_buff *skb, |
3661 | struct net_device *dev, | |
3662 | netdev_features_t features); | |
c1e756bf | 3663 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 3664 | |
4d29515f | 3665 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 3666 | { |
c8f44aff | 3667 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
3668 | |
3669 | /* check flags correspondence */ | |
3670 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
3671 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
3672 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
3673 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
3674 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
3675 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
3676 | BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); |
3677 | BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); | |
3678 | BUILD_BUG_ON(SKB_GSO_IPIP != (NETIF_F_GSO_IPIP >> NETIF_F_GSO_SHIFT)); | |
3679 | BUILD_BUG_ON(SKB_GSO_SIT != (NETIF_F_GSO_SIT >> NETIF_F_GSO_SHIFT)); | |
3680 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); | |
3681 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); | |
e585f236 | 3682 | BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); |
0345e186 | 3683 | |
d6b4991a | 3684 | return (features & feature) == feature; |
576a30eb HX |
3685 | } |
3686 | ||
4d29515f | 3687 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 3688 | { |
278b2513 | 3689 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 3690 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
3691 | } |
3692 | ||
04ffcb25 | 3693 | static inline bool netif_needs_gso(struct net_device *dev, struct sk_buff *skb, |
4d29515f | 3694 | netdev_features_t features) |
7967168c | 3695 | { |
fc741216 | 3696 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
3697 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
3698 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
3699 | } |
3700 | ||
82cc1a7a PWJ |
3701 | static inline void netif_set_gso_max_size(struct net_device *dev, |
3702 | unsigned int size) | |
3703 | { | |
3704 | dev->gso_max_size = size; | |
3705 | } | |
3706 | ||
7a7ffbab WCC |
3707 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
3708 | int pulled_hlen, u16 mac_offset, | |
3709 | int mac_len) | |
3710 | { | |
3711 | skb->protocol = protocol; | |
3712 | skb->encapsulation = 1; | |
3713 | skb_push(skb, pulled_hlen); | |
3714 | skb_reset_transport_header(skb); | |
3715 | skb->mac_header = mac_offset; | |
3716 | skb->network_header = skb->mac_header + mac_len; | |
3717 | skb->mac_len = mac_len; | |
3718 | } | |
3719 | ||
a6cc0cfa JF |
3720 | static inline bool netif_is_macvlan(struct net_device *dev) |
3721 | { | |
3722 | return dev->priv_flags & IFF_MACVLAN; | |
3723 | } | |
3724 | ||
2f33e7d5 MB |
3725 | static inline bool netif_is_macvlan_port(struct net_device *dev) |
3726 | { | |
3727 | return dev->priv_flags & IFF_MACVLAN_PORT; | |
3728 | } | |
3729 | ||
5933fea7 MB |
3730 | static inline bool netif_is_ipvlan(struct net_device *dev) |
3731 | { | |
3732 | return dev->priv_flags & IFF_IPVLAN_SLAVE; | |
3733 | } | |
3734 | ||
3735 | static inline bool netif_is_ipvlan_port(struct net_device *dev) | |
3736 | { | |
3737 | return dev->priv_flags & IFF_IPVLAN_MASTER; | |
3738 | } | |
3739 | ||
8a7fbfab | 3740 | static inline bool netif_is_bond_master(struct net_device *dev) |
3741 | { | |
3742 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
3743 | } | |
3744 | ||
4d29515f | 3745 | static inline bool netif_is_bond_slave(struct net_device *dev) |
1765a575 JP |
3746 | { |
3747 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
3748 | } | |
3749 | ||
3bdc0eba BG |
3750 | static inline bool netif_supports_nofcs(struct net_device *dev) |
3751 | { | |
3752 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
3753 | } | |
3754 | ||
02875878 ED |
3755 | /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ |
3756 | static inline void netif_keep_dst(struct net_device *dev) | |
3757 | { | |
3758 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); | |
3759 | } | |
3760 | ||
505d4f73 | 3761 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 3762 | |
571ba423 JP |
3763 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
3764 | ||
3765 | /* netdev_printk helpers, similar to dev_printk */ | |
3766 | ||
3767 | static inline const char *netdev_name(const struct net_device *dev) | |
3768 | { | |
c6f854d5 VF |
3769 | if (!dev->name[0] || strchr(dev->name, '%')) |
3770 | return "(unnamed net_device)"; | |
571ba423 JP |
3771 | return dev->name; |
3772 | } | |
3773 | ||
ccc7f496 VF |
3774 | static inline const char *netdev_reg_state(const struct net_device *dev) |
3775 | { | |
3776 | switch (dev->reg_state) { | |
3777 | case NETREG_UNINITIALIZED: return " (uninitialized)"; | |
3778 | case NETREG_REGISTERED: return ""; | |
3779 | case NETREG_UNREGISTERING: return " (unregistering)"; | |
3780 | case NETREG_UNREGISTERED: return " (unregistered)"; | |
3781 | case NETREG_RELEASED: return " (released)"; | |
3782 | case NETREG_DUMMY: return " (dummy)"; | |
3783 | } | |
3784 | ||
3785 | WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state); | |
3786 | return " (unknown)"; | |
3787 | } | |
3788 | ||
f629d208 | 3789 | __printf(3, 4) |
6ea754eb JP |
3790 | void netdev_printk(const char *level, const struct net_device *dev, |
3791 | const char *format, ...); | |
f629d208 | 3792 | __printf(2, 3) |
6ea754eb | 3793 | void netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 3794 | __printf(2, 3) |
6ea754eb | 3795 | void netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 3796 | __printf(2, 3) |
6ea754eb | 3797 | void netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 3798 | __printf(2, 3) |
6ea754eb | 3799 | void netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 3800 | __printf(2, 3) |
6ea754eb | 3801 | void netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 3802 | __printf(2, 3) |
6ea754eb | 3803 | void netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 3804 | __printf(2, 3) |
6ea754eb | 3805 | void netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 3806 | |
8909c9ad VK |
3807 | #define MODULE_ALIAS_NETDEV(device) \ |
3808 | MODULE_ALIAS("netdev-" device) | |
3809 | ||
b558c96f | 3810 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
3811 | #define netdev_dbg(__dev, format, args...) \ |
3812 | do { \ | |
ffa10cb4 | 3813 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 3814 | } while (0) |
b558c96f JC |
3815 | #elif defined(DEBUG) |
3816 | #define netdev_dbg(__dev, format, args...) \ | |
3817 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
3818 | #else |
3819 | #define netdev_dbg(__dev, format, args...) \ | |
3820 | ({ \ | |
3821 | if (0) \ | |
3822 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
571ba423 JP |
3823 | }) |
3824 | #endif | |
3825 | ||
3826 | #if defined(VERBOSE_DEBUG) | |
3827 | #define netdev_vdbg netdev_dbg | |
3828 | #else | |
3829 | ||
3830 | #define netdev_vdbg(dev, format, args...) \ | |
3831 | ({ \ | |
3832 | if (0) \ | |
3833 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
3834 | 0; \ | |
3835 | }) | |
3836 | #endif | |
3837 | ||
3838 | /* | |
3839 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
3840 | * of using a WARN/WARN_ON to get the message out, including the | |
3841 | * file/line information and a backtrace. | |
3842 | */ | |
3843 | #define netdev_WARN(dev, format, args...) \ | |
ccc7f496 VF |
3844 | WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \ |
3845 | netdev_reg_state(dev), ##args) | |
571ba423 | 3846 | |
b3d95c5c JP |
3847 | /* netif printk helpers, similar to netdev_printk */ |
3848 | ||
3849 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
3850 | do { \ | |
3851 | if (netif_msg_##type(priv)) \ | |
3852 | netdev_printk(level, (dev), fmt, ##args); \ | |
3853 | } while (0) | |
3854 | ||
f45f4321 JP |
3855 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
3856 | do { \ | |
3857 | if (netif_msg_##type(priv)) \ | |
3858 | netdev_##level(dev, fmt, ##args); \ | |
3859 | } while (0) | |
3860 | ||
b3d95c5c | 3861 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 3862 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 3863 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 3864 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 3865 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 3866 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 3867 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 3868 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 3869 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 3870 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 3871 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 3872 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 3873 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 3874 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 3875 | |
0053ea9c | 3876 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
3877 | #define netif_dbg(priv, type, netdev, format, args...) \ |
3878 | do { \ | |
3879 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 3880 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 3881 | } while (0) |
0053ea9c JP |
3882 | #elif defined(DEBUG) |
3883 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3884 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
3885 | #else |
3886 | #define netif_dbg(priv, type, dev, format, args...) \ | |
3887 | ({ \ | |
3888 | if (0) \ | |
3889 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
3890 | 0; \ | |
3891 | }) | |
3892 | #endif | |
3893 | ||
3894 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 3895 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
3896 | #else |
3897 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
3898 | ({ \ | |
3899 | if (0) \ | |
a4ed89cb | 3900 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
3901 | 0; \ |
3902 | }) | |
3903 | #endif | |
571ba423 | 3904 | |
900ff8c6 CW |
3905 | /* |
3906 | * The list of packet types we will receive (as opposed to discard) | |
3907 | * and the routines to invoke. | |
3908 | * | |
3909 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
3910 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
3911 | * | |
3912 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
3913 | * sure which should go first, but I bet it won't make much | |
3914 | * difference if we are running VLANs. The good news is that | |
3915 | * this protocol won't be in the list unless compiled in, so | |
3916 | * the average user (w/out VLANs) will not be adversely affected. | |
3917 | * --BLG | |
3918 | * | |
3919 | * 0800 IP | |
3920 | * 8100 802.1Q VLAN | |
3921 | * 0001 802.3 | |
3922 | * 0002 AX.25 | |
3923 | * 0004 802.2 | |
3924 | * 8035 RARP | |
3925 | * 0005 SNAP | |
3926 | * 0805 X.25 | |
3927 | * 0806 ARP | |
3928 | * 8137 IPX | |
3929 | * 0009 Localtalk | |
3930 | * 86DD IPv6 | |
3931 | */ | |
3932 | #define PTYPE_HASH_SIZE (16) | |
3933 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
3934 | ||
385a154c | 3935 | #endif /* _LINUX_NETDEVICE_H */ |