Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Definitions for the Interfaces handler. | |
7 | * | |
8 | * Version: @(#)dev.h 1.0.10 08/12/93 | |
9 | * | |
02c30a84 | 10 | * Authors: Ross Biro |
1da177e4 LT |
11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
12 | * Corey Minyard <wf-rch!minyard@relay.EU.net> | |
13 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> | |
113aa838 | 14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
15 | * Bjorn Ekwall. <bj0rn@blox.se> |
16 | * Pekka Riikonen <priikone@poseidon.pspt.fi> | |
17 | * | |
18 | * This program is free software; you can redistribute it and/or | |
19 | * modify it under the terms of the GNU General Public License | |
20 | * as published by the Free Software Foundation; either version | |
21 | * 2 of the License, or (at your option) any later version. | |
22 | * | |
23 | * Moved to /usr/include/linux for NET3 | |
24 | */ | |
25 | #ifndef _LINUX_NETDEVICE_H | |
26 | #define _LINUX_NETDEVICE_H | |
27 | ||
d7fe0f24 | 28 | #include <linux/timer.h> |
187f1882 | 29 | #include <linux/bug.h> |
bea3348e | 30 | #include <linux/delay.h> |
60063497 | 31 | #include <linux/atomic.h> |
53511453 | 32 | #include <linux/prefetch.h> |
1da177e4 LT |
33 | #include <asm/cache.h> |
34 | #include <asm/byteorder.h> | |
35 | ||
1da177e4 | 36 | #include <linux/percpu.h> |
4d5b78c0 | 37 | #include <linux/rculist.h> |
db217334 | 38 | #include <linux/dmaengine.h> |
bea3348e | 39 | #include <linux/workqueue.h> |
114cf580 | 40 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 41 | |
b1b67dd4 | 42 | #include <linux/ethtool.h> |
a050c33f | 43 | #include <net/net_namespace.h> |
cf85d08f | 44 | #include <net/dsa.h> |
7a6b6f51 | 45 | #ifdef CONFIG_DCB |
2f90b865 AD |
46 | #include <net/dcbnl.h> |
47 | #endif | |
5bc1421e | 48 | #include <net/netprio_cgroup.h> |
a050c33f | 49 | |
a59e2ecb | 50 | #include <linux/netdev_features.h> |
77162022 | 51 | #include <linux/neighbour.h> |
607ca46e | 52 | #include <uapi/linux/netdevice.h> |
61bd3857 | 53 | #include <uapi/linux/if_bonding.h> |
e4c6734e | 54 | #include <uapi/linux/pkt_cls.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; | |
03c57747 | 63 | struct mpls_dev; |
1da177e4 | 64 | |
f629d208 JP |
65 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
66 | const struct ethtool_ops *ops); | |
d07d7507 | 67 | |
9a1654ba JP |
68 | /* Backlog congestion levels */ |
69 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
70 | #define NET_RX_DROP 1 /* packet dropped */ | |
71 | ||
572a9d7b PM |
72 | /* |
73 | * Transmit return codes: transmit return codes originate from three different | |
74 | * namespaces: | |
75 | * | |
76 | * - qdisc return codes | |
77 | * - driver transmit return codes | |
78 | * - errno values | |
79 | * | |
80 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
81 | * function. Real network devices commonly used with qdiscs should only return | |
82 | * the driver transmit return codes though - when qdiscs are used, the actual | |
83 | * transmission happens asynchronously, so the value is not propagated to | |
5e82b4b2 BH |
84 | * higher layers. Virtual network devices transmit synchronously; in this case |
85 | * the driver transmit return codes are consumed by dev_queue_xmit(), and all | |
572a9d7b PM |
86 | * others are propagated to higher layers. |
87 | */ | |
88 | ||
89 | /* qdisc ->enqueue() return codes. */ | |
90 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
91 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
92 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
93 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
94 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 95 | |
b9df3cb8 GR |
96 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
97 | * indicates that the device will soon be dropping packets, or already drops | |
98 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 99 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
100 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
101 | ||
dc1f8bf6 | 102 | /* Driver transmit return codes */ |
9a1654ba | 103 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 104 | |
dc1f8bf6 | 105 | enum netdev_tx { |
572a9d7b | 106 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
107 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
108 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
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 | 130 | /* |
5e82b4b2 | 131 | * Compute the worst-case header length according to the protocols |
1da177e4 LT |
132 | * used. |
133 | */ | |
fe2918b0 | 134 | |
c0eb4540 KS |
135 | #if defined(CONFIG_HYPERV_NET) |
136 | # define LL_MAX_HEADER 128 | |
137 | #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) | |
8388e3da DM |
138 | # if defined(CONFIG_MAC80211_MESH) |
139 | # define LL_MAX_HEADER 128 | |
140 | # else | |
141 | # define LL_MAX_HEADER 96 | |
142 | # endif | |
1da177e4 | 143 | #else |
8388e3da | 144 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
145 | #endif |
146 | ||
d11ead75 BH |
147 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
148 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
149 | #define MAX_HEADER LL_MAX_HEADER |
150 | #else | |
151 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
152 | #endif | |
153 | ||
154 | /* | |
be1f3c2c BH |
155 | * Old network device statistics. Fields are native words |
156 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 157 | */ |
fe2918b0 | 158 | |
d94d9fee | 159 | struct net_device_stats { |
3cfde79c BH |
160 | unsigned long rx_packets; |
161 | unsigned long tx_packets; | |
162 | unsigned long rx_bytes; | |
163 | unsigned long tx_bytes; | |
164 | unsigned long rx_errors; | |
165 | unsigned long tx_errors; | |
166 | unsigned long rx_dropped; | |
167 | unsigned long tx_dropped; | |
168 | unsigned long multicast; | |
1da177e4 | 169 | unsigned long collisions; |
1da177e4 | 170 | unsigned long rx_length_errors; |
3cfde79c BH |
171 | unsigned long rx_over_errors; |
172 | unsigned long rx_crc_errors; | |
173 | unsigned long rx_frame_errors; | |
174 | unsigned long rx_fifo_errors; | |
175 | unsigned long rx_missed_errors; | |
1da177e4 LT |
176 | unsigned long tx_aborted_errors; |
177 | unsigned long tx_carrier_errors; | |
178 | unsigned long tx_fifo_errors; | |
179 | unsigned long tx_heartbeat_errors; | |
180 | unsigned long tx_window_errors; | |
1da177e4 LT |
181 | unsigned long rx_compressed; |
182 | unsigned long tx_compressed; | |
183 | }; | |
184 | ||
1da177e4 LT |
185 | |
186 | #include <linux/cache.h> | |
187 | #include <linux/skbuff.h> | |
188 | ||
adc9300e | 189 | #ifdef CONFIG_RPS |
c5905afb IM |
190 | #include <linux/static_key.h> |
191 | extern struct static_key rps_needed; | |
adc9300e ED |
192 | #endif |
193 | ||
1da177e4 LT |
194 | struct neighbour; |
195 | struct neigh_parms; | |
196 | struct sk_buff; | |
197 | ||
f001fde5 JP |
198 | struct netdev_hw_addr { |
199 | struct list_head list; | |
200 | unsigned char addr[MAX_ADDR_LEN]; | |
201 | unsigned char type; | |
ccffad25 JP |
202 | #define NETDEV_HW_ADDR_T_LAN 1 |
203 | #define NETDEV_HW_ADDR_T_SAN 2 | |
204 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
205 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 206 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 207 | bool global_use; |
4cd729b0 | 208 | int sync_cnt; |
8f8f103d | 209 | int refcount; |
4543fbef | 210 | int synced; |
f001fde5 JP |
211 | struct rcu_head rcu_head; |
212 | }; | |
213 | ||
31278e71 JP |
214 | struct netdev_hw_addr_list { |
215 | struct list_head list; | |
216 | int count; | |
217 | }; | |
218 | ||
22bedad3 JP |
219 | #define netdev_hw_addr_list_count(l) ((l)->count) |
220 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
221 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
222 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 223 | |
22bedad3 JP |
224 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
225 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
226 | #define netdev_for_each_uc_addr(ha, dev) \ | |
227 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 228 | |
22bedad3 JP |
229 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
230 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 231 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 232 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 233 | |
d94d9fee | 234 | struct hh_cache { |
f6b72b62 | 235 | u16 hh_len; |
5c25f686 | 236 | u16 __pad; |
3644f0ce | 237 | seqlock_t hh_lock; |
1da177e4 LT |
238 | |
239 | /* cached hardware header; allow for machine alignment needs. */ | |
240 | #define HH_DATA_MOD 16 | |
241 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 242 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
243 | #define HH_DATA_ALIGN(__len) \ |
244 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
245 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
246 | }; | |
247 | ||
5e82b4b2 | 248 | /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
1da177e4 LT |
249 | * Alternative is: |
250 | * dev->hard_header_len ? (dev->hard_header_len + | |
251 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
252 | * | |
253 | * We could use other alignment values, but we must maintain the | |
254 | * relationship HH alignment <= LL alignment. | |
255 | */ | |
256 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 257 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 258 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 259 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 260 | |
3b04ddde SH |
261 | struct header_ops { |
262 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
263 | unsigned short type, const void *daddr, | |
95c96174 | 264 | const void *saddr, unsigned int len); |
3b04ddde | 265 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
e69dd336 | 266 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
267 | void (*cache_update)(struct hh_cache *hh, |
268 | const struct net_device *dev, | |
269 | const unsigned char *haddr); | |
2793a23a | 270 | bool (*validate)(const char *ll_header, unsigned int len); |
3b04ddde SH |
271 | }; |
272 | ||
1da177e4 | 273 | /* These flag bits are private to the generic network queueing |
5e82b4b2 | 274 | * layer; they may not be explicitly referenced by any other |
1da177e4 LT |
275 | * code. |
276 | */ | |
277 | ||
d94d9fee | 278 | enum netdev_state_t { |
1da177e4 LT |
279 | __LINK_STATE_START, |
280 | __LINK_STATE_PRESENT, | |
1da177e4 | 281 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
282 | __LINK_STATE_LINKWATCH_PENDING, |
283 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
284 | }; |
285 | ||
286 | ||
287 | /* | |
5e82b4b2 | 288 | * This structure holds boot-time configured netdevice settings. They |
fe2918b0 | 289 | * are then used in the device probing. |
1da177e4 LT |
290 | */ |
291 | struct netdev_boot_setup { | |
292 | char name[IFNAMSIZ]; | |
293 | struct ifmap map; | |
294 | }; | |
295 | #define NETDEV_BOOT_SETUP_MAX 8 | |
296 | ||
f629d208 | 297 | int __init netdev_boot_setup(char *str); |
1da177e4 | 298 | |
bea3348e SH |
299 | /* |
300 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
301 | */ | |
302 | struct napi_struct { | |
303 | /* The poll_list must only be managed by the entity which | |
304 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
305 | * whoever atomically sets that bit can add this napi_struct | |
5e82b4b2 | 306 | * to the per-CPU poll_list, and whoever clears that bit |
bea3348e SH |
307 | * can remove from the list right before clearing the bit. |
308 | */ | |
309 | struct list_head poll_list; | |
310 | ||
311 | unsigned long state; | |
312 | int weight; | |
404f7c9e | 313 | unsigned int gro_count; |
bea3348e SH |
314 | int (*poll)(struct napi_struct *, int); |
315 | #ifdef CONFIG_NETPOLL | |
316 | spinlock_t poll_lock; | |
317 | int poll_owner; | |
bea3348e | 318 | #endif |
5d38a079 | 319 | struct net_device *dev; |
d565b0a1 | 320 | struct sk_buff *gro_list; |
5d38a079 | 321 | struct sk_buff *skb; |
3b47d303 | 322 | struct hrtimer timer; |
404f7c9e | 323 | struct list_head dev_list; |
af12fa6e ET |
324 | struct hlist_node napi_hash_node; |
325 | unsigned int napi_id; | |
bea3348e SH |
326 | }; |
327 | ||
d94d9fee | 328 | enum { |
bea3348e | 329 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 330 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 331 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
d64b5e85 ED |
332 | NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */ |
333 | NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */ | |
bea3348e SH |
334 | }; |
335 | ||
5b252f0c | 336 | enum gro_result { |
d1c76af9 HX |
337 | GRO_MERGED, |
338 | GRO_MERGED_FREE, | |
339 | GRO_HELD, | |
340 | GRO_NORMAL, | |
341 | GRO_DROP, | |
342 | }; | |
5b252f0c | 343 | typedef enum gro_result gro_result_t; |
d1c76af9 | 344 | |
8a4eb573 JP |
345 | /* |
346 | * enum rx_handler_result - Possible return values for rx_handlers. | |
347 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
348 | * further. | |
349 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
350 | * case skb->dev was changed by rx_handler. | |
351 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
5e82b4b2 | 352 | * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
8a4eb573 JP |
353 | * |
354 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
355 | * special processing of the skb, prior to delivery to protocol handlers. | |
356 | * | |
357 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
358 | * to register a second rx_handler will return -EBUSY. | |
359 | * | |
360 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
361 | * To unregister a rx_handler on a net_device, use | |
362 | * netdev_rx_handler_unregister(). | |
363 | * | |
364 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
365 | * do with the skb. | |
366 | * | |
5e82b4b2 | 367 | * If the rx_handler consumed the skb in some way, it should return |
8a4eb573 | 368 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
5e82b4b2 | 369 | * the skb to be delivered in some other way. |
8a4eb573 JP |
370 | * |
371 | * If the rx_handler changed skb->dev, to divert the skb to another | |
372 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
373 | * new device will be called if it exists. | |
374 | * | |
5e82b4b2 | 375 | * If the rx_handler decides the skb should be ignored, it should return |
8a4eb573 | 376 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
d93cf068 | 377 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 | 378 | * |
5e82b4b2 | 379 | * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
8a4eb573 JP |
380 | * delivered, it should return RX_HANDLER_PASS. |
381 | * | |
382 | * A device without a registered rx_handler will behave as if rx_handler | |
383 | * returned RX_HANDLER_PASS. | |
384 | */ | |
385 | ||
386 | enum rx_handler_result { | |
387 | RX_HANDLER_CONSUMED, | |
388 | RX_HANDLER_ANOTHER, | |
389 | RX_HANDLER_EXACT, | |
390 | RX_HANDLER_PASS, | |
391 | }; | |
392 | typedef enum rx_handler_result rx_handler_result_t; | |
393 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 394 | |
f629d208 | 395 | void __napi_schedule(struct napi_struct *n); |
bc9ad166 | 396 | void __napi_schedule_irqoff(struct napi_struct *n); |
bea3348e | 397 | |
4d29515f | 398 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
399 | { |
400 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
401 | } | |
402 | ||
bea3348e | 403 | /** |
5e82b4b2 BH |
404 | * napi_schedule_prep - check if NAPI can be scheduled |
405 | * @n: NAPI context | |
bea3348e SH |
406 | * |
407 | * Test if NAPI routine is already running, and if not mark | |
5e82b4b2 | 408 | * it as running. This is used as a condition variable to |
a0a46196 DM |
409 | * insure only one NAPI poll instance runs. We also make |
410 | * sure there is no pending NAPI disable. | |
bea3348e | 411 | */ |
4d29515f | 412 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 413 | { |
a0a46196 DM |
414 | return !napi_disable_pending(n) && |
415 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
416 | } |
417 | ||
418 | /** | |
419 | * napi_schedule - schedule NAPI poll | |
5e82b4b2 | 420 | * @n: NAPI context |
bea3348e SH |
421 | * |
422 | * Schedule NAPI poll routine to be called if it is not already | |
423 | * running. | |
424 | */ | |
425 | static inline void napi_schedule(struct napi_struct *n) | |
426 | { | |
427 | if (napi_schedule_prep(n)) | |
428 | __napi_schedule(n); | |
429 | } | |
430 | ||
bc9ad166 ED |
431 | /** |
432 | * napi_schedule_irqoff - schedule NAPI poll | |
5e82b4b2 | 433 | * @n: NAPI context |
bc9ad166 ED |
434 | * |
435 | * Variant of napi_schedule(), assuming hard irqs are masked. | |
436 | */ | |
437 | static inline void napi_schedule_irqoff(struct napi_struct *n) | |
438 | { | |
439 | if (napi_schedule_prep(n)) | |
440 | __napi_schedule_irqoff(n); | |
441 | } | |
442 | ||
bfe13f54 | 443 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 444 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
445 | { |
446 | if (napi_schedule_prep(napi)) { | |
447 | __napi_schedule(napi); | |
4d29515f | 448 | return true; |
bfe13f54 | 449 | } |
4d29515f | 450 | return false; |
bfe13f54 RD |
451 | } |
452 | ||
3b47d303 ED |
453 | void __napi_complete(struct napi_struct *n); |
454 | void napi_complete_done(struct napi_struct *n, int work_done); | |
bea3348e SH |
455 | /** |
456 | * napi_complete - NAPI processing complete | |
5e82b4b2 | 457 | * @n: NAPI context |
bea3348e SH |
458 | * |
459 | * Mark NAPI processing as complete. | |
3b47d303 | 460 | * Consider using napi_complete_done() instead. |
bea3348e | 461 | */ |
3b47d303 ED |
462 | static inline void napi_complete(struct napi_struct *n) |
463 | { | |
464 | return napi_complete_done(n, 0); | |
465 | } | |
bea3348e | 466 | |
af12fa6e ET |
467 | /** |
468 | * napi_hash_add - add a NAPI to global hashtable | |
5e82b4b2 | 469 | * @napi: NAPI context |
af12fa6e | 470 | * |
5e82b4b2 BH |
471 | * Generate a new napi_id and store a @napi under it in napi_hash. |
472 | * Used for busy polling (CONFIG_NET_RX_BUSY_POLL). | |
93d05d4a | 473 | * Note: This is normally automatically done from netif_napi_add(), |
5e82b4b2 | 474 | * so might disappear in a future Linux version. |
af12fa6e | 475 | */ |
f629d208 | 476 | void napi_hash_add(struct napi_struct *napi); |
af12fa6e ET |
477 | |
478 | /** | |
479 | * napi_hash_del - remove a NAPI from global table | |
5e82b4b2 | 480 | * @napi: NAPI context |
af12fa6e | 481 | * |
5e82b4b2 | 482 | * Warning: caller must observe RCU grace period |
34cbe27e ED |
483 | * before freeing memory containing @napi, if |
484 | * this function returns true. | |
93d05d4a | 485 | * Note: core networking stack automatically calls it |
5e82b4b2 | 486 | * from netif_napi_del(). |
93d05d4a | 487 | * Drivers might want to call this helper to combine all |
5e82b4b2 | 488 | * the needed RCU grace periods into a single one. |
af12fa6e | 489 | */ |
34cbe27e | 490 | bool napi_hash_del(struct napi_struct *napi); |
af12fa6e | 491 | |
bea3348e SH |
492 | /** |
493 | * napi_disable - prevent NAPI from scheduling | |
5e82b4b2 | 494 | * @n: NAPI context |
bea3348e SH |
495 | * |
496 | * Stop NAPI from being scheduled on this context. | |
497 | * Waits till any outstanding processing completes. | |
498 | */ | |
3b47d303 | 499 | void napi_disable(struct napi_struct *n); |
bea3348e SH |
500 | |
501 | /** | |
502 | * napi_enable - enable NAPI scheduling | |
5e82b4b2 | 503 | * @n: NAPI context |
bea3348e SH |
504 | * |
505 | * Resume NAPI from being scheduled on this context. | |
506 | * Must be paired with napi_disable. | |
507 | */ | |
508 | static inline void napi_enable(struct napi_struct *n) | |
509 | { | |
510 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
4e857c58 | 511 | smp_mb__before_atomic(); |
bea3348e | 512 | clear_bit(NAPI_STATE_SCHED, &n->state); |
2d8bff12 | 513 | clear_bit(NAPI_STATE_NPSVC, &n->state); |
bea3348e SH |
514 | } |
515 | ||
c264c3de SH |
516 | /** |
517 | * napi_synchronize - wait until NAPI is not running | |
5e82b4b2 | 518 | * @n: NAPI context |
c264c3de SH |
519 | * |
520 | * Wait until NAPI is done being scheduled on this context. | |
521 | * Waits till any outstanding processing completes but | |
522 | * does not disable future activations. | |
523 | */ | |
524 | static inline void napi_synchronize(const struct napi_struct *n) | |
525 | { | |
facc432f AB |
526 | if (IS_ENABLED(CONFIG_SMP)) |
527 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
528 | msleep(1); | |
529 | else | |
530 | barrier(); | |
c264c3de | 531 | } |
c264c3de | 532 | |
d94d9fee | 533 | enum netdev_queue_state_t { |
73466498 TH |
534 | __QUEUE_STATE_DRV_XOFF, |
535 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 536 | __QUEUE_STATE_FROZEN, |
79d16385 | 537 | }; |
8e2f1a63 DB |
538 | |
539 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
540 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
541 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
542 | ||
543 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
544 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
545 | QUEUE_STATE_FROZEN) | |
546 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
547 | QUEUE_STATE_FROZEN) | |
548 | ||
73466498 TH |
549 | /* |
550 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
551 | * netif_tx_* functions below are used to manipulate this flag. The | |
552 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
553 | * queue independently. The netif_xmit_*stopped functions below are called | |
554 | * to check if the queue has been stopped by the driver or stack (either | |
555 | * of the XOFF bits are set in the state). Drivers should not need to call | |
556 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
557 | */ | |
79d16385 | 558 | |
bb949fbd | 559 | struct netdev_queue { |
6a321cb3 | 560 | /* |
5e82b4b2 | 561 | * read-mostly part |
6a321cb3 | 562 | */ |
bb949fbd | 563 | struct net_device *dev; |
46e5da40 | 564 | struct Qdisc __rcu *qdisc; |
b0e1e646 | 565 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 566 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
567 | struct kobject kobj; |
568 | #endif | |
f2cd2d3e ED |
569 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
570 | int numa_node; | |
571 | #endif | |
c0ef079c FW |
572 | unsigned long tx_maxrate; |
573 | /* | |
574 | * Number of TX timeouts for this queue | |
575 | * (/sys/class/net/DEV/Q/trans_timeout) | |
576 | */ | |
577 | unsigned long trans_timeout; | |
6a321cb3 | 578 | /* |
5e82b4b2 | 579 | * write-mostly part |
6a321cb3 ED |
580 | */ |
581 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
582 | int xmit_lock_owner; | |
9d21493b | 583 | /* |
9b36627a | 584 | * Time (in jiffies) of last Tx |
9d21493b ED |
585 | */ |
586 | unsigned long trans_start; | |
ccf5ff69 | 587 | |
114cf580 TH |
588 | unsigned long state; |
589 | ||
590 | #ifdef CONFIG_BQL | |
591 | struct dql dql; | |
592 | #endif | |
e8a0464c | 593 | } ____cacheline_aligned_in_smp; |
bb949fbd | 594 | |
f2cd2d3e ED |
595 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
596 | { | |
597 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
598 | return q->numa_node; | |
599 | #else | |
b236da69 | 600 | return NUMA_NO_NODE; |
f2cd2d3e ED |
601 | #endif |
602 | } | |
603 | ||
604 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
605 | { | |
606 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
607 | q->numa_node = node; | |
608 | #endif | |
609 | } | |
610 | ||
df334545 | 611 | #ifdef CONFIG_RPS |
0a9627f2 TH |
612 | /* |
613 | * This structure holds an RPS map which can be of variable length. The | |
614 | * map is an array of CPUs. | |
615 | */ | |
616 | struct rps_map { | |
617 | unsigned int len; | |
618 | struct rcu_head rcu; | |
619 | u16 cpus[0]; | |
620 | }; | |
60b778ce | 621 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 622 | |
fec5e652 | 623 | /* |
c445477d BH |
624 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
625 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
626 | * a hardware filter index. | |
fec5e652 TH |
627 | */ |
628 | struct rps_dev_flow { | |
629 | u16 cpu; | |
c445477d | 630 | u16 filter; |
fec5e652 TH |
631 | unsigned int last_qtail; |
632 | }; | |
c445477d | 633 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
634 | |
635 | /* | |
636 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
637 | */ | |
638 | struct rps_dev_flow_table { | |
639 | unsigned int mask; | |
640 | struct rcu_head rcu; | |
fec5e652 TH |
641 | struct rps_dev_flow flows[0]; |
642 | }; | |
643 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 644 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
645 | |
646 | /* | |
647 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
648 | * on which they were processed by the application (set in recvmsg). | |
5e82b4b2 BH |
649 | * Each entry is a 32bit value. Upper part is the high-order bits |
650 | * of flow hash, lower part is CPU number. | |
567e4b79 | 651 | * rps_cpu_mask is used to partition the space, depending on number of |
5e82b4b2 BH |
652 | * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 |
653 | * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f, | |
567e4b79 | 654 | * meaning we use 32-6=26 bits for the hash. |
fec5e652 TH |
655 | */ |
656 | struct rps_sock_flow_table { | |
567e4b79 | 657 | u32 mask; |
93c1af6c ED |
658 | |
659 | u32 ents[0] ____cacheline_aligned_in_smp; | |
fec5e652 | 660 | }; |
567e4b79 | 661 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
fec5e652 TH |
662 | |
663 | #define RPS_NO_CPU 0xffff | |
664 | ||
567e4b79 ED |
665 | extern u32 rps_cpu_mask; |
666 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; | |
667 | ||
fec5e652 TH |
668 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
669 | u32 hash) | |
670 | { | |
671 | if (table && hash) { | |
567e4b79 ED |
672 | unsigned int index = hash & table->mask; |
673 | u32 val = hash & ~rps_cpu_mask; | |
fec5e652 | 674 | |
5e82b4b2 | 675 | /* We only give a hint, preemption can change CPU under us */ |
567e4b79 | 676 | val |= raw_smp_processor_id(); |
fec5e652 | 677 | |
567e4b79 ED |
678 | if (table->ents[index] != val) |
679 | table->ents[index] = val; | |
fec5e652 TH |
680 | } |
681 | } | |
682 | ||
c445477d | 683 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
684 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
685 | u16 filter_id); | |
c445477d | 686 | #endif |
a953be53 | 687 | #endif /* CONFIG_RPS */ |
c445477d | 688 | |
0a9627f2 TH |
689 | /* This structure contains an instance of an RX queue. */ |
690 | struct netdev_rx_queue { | |
a953be53 | 691 | #ifdef CONFIG_RPS |
6e3f7faf ED |
692 | struct rps_map __rcu *rps_map; |
693 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 694 | #endif |
6e3f7faf | 695 | struct kobject kobj; |
fe822240 | 696 | struct net_device *dev; |
0a9627f2 | 697 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
698 | |
699 | /* | |
700 | * RX queue sysfs structures and functions. | |
701 | */ | |
702 | struct rx_queue_attribute { | |
703 | struct attribute attr; | |
704 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
705 | struct rx_queue_attribute *attr, char *buf); | |
706 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
707 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
708 | }; | |
d314774c | 709 | |
bf264145 TH |
710 | #ifdef CONFIG_XPS |
711 | /* | |
712 | * This structure holds an XPS map which can be of variable length. The | |
713 | * map is an array of queues. | |
714 | */ | |
715 | struct xps_map { | |
716 | unsigned int len; | |
717 | unsigned int alloc_len; | |
718 | struct rcu_head rcu; | |
719 | u16 queues[0]; | |
720 | }; | |
60b778ce | 721 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
c59f419b HD |
722 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
723 | - sizeof(struct xps_map)) / sizeof(u16)) | |
bf264145 TH |
724 | |
725 | /* | |
726 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
727 | */ | |
728 | struct xps_dev_maps { | |
729 | struct rcu_head rcu; | |
a4177869 | 730 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
731 | }; |
732 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
733 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
734 | #endif /* CONFIG_XPS */ | |
735 | ||
4f57c087 JF |
736 | #define TC_MAX_QUEUE 16 |
737 | #define TC_BITMASK 15 | |
738 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
739 | struct netdev_tc_txq { | |
740 | u16 count; | |
741 | u16 offset; | |
742 | }; | |
743 | ||
68bad94e NP |
744 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
745 | /* | |
746 | * This structure is to hold information about the device | |
747 | * configured to run FCoE protocol stack. | |
748 | */ | |
749 | struct netdev_fcoe_hbainfo { | |
750 | char manufacturer[64]; | |
751 | char serial_number[64]; | |
752 | char hardware_version[64]; | |
753 | char driver_version[64]; | |
754 | char optionrom_version[64]; | |
755 | char firmware_version[64]; | |
756 | char model[256]; | |
757 | char model_description[256]; | |
758 | }; | |
759 | #endif | |
760 | ||
02637fce | 761 | #define MAX_PHYS_ITEM_ID_LEN 32 |
66b52b0d | 762 | |
02637fce JP |
763 | /* This structure holds a unique identifier to identify some |
764 | * physical item (port for example) used by a netdevice. | |
66b52b0d | 765 | */ |
02637fce JP |
766 | struct netdev_phys_item_id { |
767 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; | |
66b52b0d JP |
768 | unsigned char id_len; |
769 | }; | |
770 | ||
d754f98b SF |
771 | static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
772 | struct netdev_phys_item_id *b) | |
773 | { | |
774 | return a->id_len == b->id_len && | |
775 | memcmp(a->id, b->id, a->id_len) == 0; | |
776 | } | |
777 | ||
99932d4f DB |
778 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
779 | struct sk_buff *skb); | |
780 | ||
a1b7c5fd | 781 | /* These structures hold the attributes of qdisc and classifiers |
16e5cc64 JF |
782 | * that are being passed to the netdevice through the setup_tc op. |
783 | */ | |
784 | enum { | |
785 | TC_SETUP_MQPRIO, | |
a1b7c5fd | 786 | TC_SETUP_CLSU32, |
5b33f488 | 787 | TC_SETUP_CLSFLOWER, |
16e5cc64 JF |
788 | }; |
789 | ||
a1b7c5fd JF |
790 | struct tc_cls_u32_offload; |
791 | ||
16e5cc64 JF |
792 | struct tc_to_netdev { |
793 | unsigned int type; | |
794 | union { | |
795 | u8 tc; | |
a1b7c5fd | 796 | struct tc_cls_u32_offload *cls_u32; |
5b33f488 | 797 | struct tc_cls_flower_offload *cls_flower; |
16e5cc64 JF |
798 | }; |
799 | }; | |
800 | ||
801 | ||
d314774c SH |
802 | /* |
803 | * This structure defines the management hooks for network devices. | |
00829823 SH |
804 | * The following hooks can be defined; unless noted otherwise, they are |
805 | * optional and can be filled with a null pointer. | |
d314774c SH |
806 | * |
807 | * int (*ndo_init)(struct net_device *dev); | |
5e82b4b2 BH |
808 | * This function is called once when a network device is registered. |
809 | * The network device can use this for any late stage initialization | |
810 | * or semantic validation. It can fail with an error code which will | |
811 | * be propagated back to register_netdev. | |
d314774c SH |
812 | * |
813 | * void (*ndo_uninit)(struct net_device *dev); | |
814 | * This function is called when device is unregistered or when registration | |
815 | * fails. It is not called if init fails. | |
816 | * | |
817 | * int (*ndo_open)(struct net_device *dev); | |
5e82b4b2 | 818 | * This function is called when a network device transitions to the up |
d314774c SH |
819 | * state. |
820 | * | |
821 | * int (*ndo_stop)(struct net_device *dev); | |
5e82b4b2 | 822 | * This function is called when a network device transitions to the down |
d314774c SH |
823 | * state. |
824 | * | |
dc1f8bf6 SH |
825 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
826 | * struct net_device *dev); | |
00829823 | 827 | * Called when a packet needs to be transmitted. |
e79d8429 RR |
828 | * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
829 | * the queue before that can happen; it's for obsolete devices and weird | |
830 | * corner cases, but the stack really does a non-trivial amount | |
831 | * of useless work if you return NETDEV_TX_BUSY. | |
5e82b4b2 | 832 | * Required; cannot be NULL. |
00829823 | 833 | * |
cdba756f ED |
834 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
835 | * netdev_features_t features); | |
836 | * Adjusts the requested feature flags according to device-specific | |
837 | * constraints, and returns the resulting flags. Must not modify | |
838 | * the device state. | |
839 | * | |
f663dd9a | 840 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 841 | * void *accel_priv, select_queue_fallback_t fallback); |
5e82b4b2 | 842 | * Called to decide which queue to use when device supports multiple |
00829823 SH |
843 | * transmit queues. |
844 | * | |
d314774c SH |
845 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
846 | * This function is called to allow device receiver to make | |
5e82b4b2 | 847 | * changes to configuration when multicast or promiscuous is enabled. |
d314774c SH |
848 | * |
849 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
850 | * This function is called device changes address list filtering. | |
01789349 | 851 | * If driver handles unicast address filtering, it should set |
5e82b4b2 | 852 | * IFF_UNICAST_FLT in its priv_flags. |
d314774c SH |
853 | * |
854 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
855 | * This function is called when the Media Access Control address | |
37b607c5 | 856 | * needs to be changed. If this interface is not defined, the |
5e82b4b2 | 857 | * MAC address can not be changed. |
d314774c SH |
858 | * |
859 | * int (*ndo_validate_addr)(struct net_device *dev); | |
860 | * Test if Media Access Control address is valid for the device. | |
861 | * | |
862 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
5e82b4b2 BH |
863 | * Called when a user requests an ioctl which can't be handled by |
864 | * the generic interface code. If not defined ioctls return | |
d314774c SH |
865 | * not supported error code. |
866 | * | |
867 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
868 | * Used to set network devices bus interface parameters. This interface | |
5e82b4b2 | 869 | * is retained for legacy reasons; new devices should use the bus |
d314774c SH |
870 | * interface (PCI) for low level management. |
871 | * | |
872 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
873 | * Called when a user wants to change the Maximum Transfer Unit | |
874 | * of a device. If not defined, any request to change MTU will | |
875 | * will return an error. | |
876 | * | |
00829823 | 877 | * void (*ndo_tx_timeout)(struct net_device *dev); |
5e82b4b2 | 878 | * Callback used when the transmitter has not made any progress |
d314774c SH |
879 | * for dev->watchdog ticks. |
880 | * | |
3cfde79c | 881 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 882 | * struct rtnl_link_stats64 *storage); |
d308e38f | 883 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 884 | * Called when a user wants to get the network device usage |
be1f3c2c | 885 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
886 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
887 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 888 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
889 | * (which should normally be dev->stats) and return a pointer to |
890 | * it. The structure may be changed asynchronously only if each | |
891 | * field is written atomically. | |
892 | * 3. Update dev->stats asynchronously and atomically, and define | |
893 | * neither operation. | |
d314774c | 894 | * |
5d632cb7 | 895 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 896 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 897 | * VLAN id is registered. |
d314774c | 898 | * |
5d632cb7 | 899 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 900 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 901 | * VLAN id is unregistered. |
d314774c SH |
902 | * |
903 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
904 | * |
905 | * SR-IOV management functions. | |
906 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
907 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
ed616689 SC |
908 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
909 | * int max_tx_rate); | |
5f8444a3 | 910 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
dd461d6a | 911 | * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
912 | * int (*ndo_get_vf_config)(struct net_device *dev, |
913 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 914 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
915 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
916 | * struct nlattr *port[]); | |
01a3d796 VZ |
917 | * |
918 | * Enable or disable the VF ability to query its RSS Redirection Table and | |
919 | * Hash Key. This is needed since on some devices VF share this information | |
5e82b4b2 | 920 | * with PF and querying it may introduce a theoretical security risk. |
01a3d796 | 921 | * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
57b61080 | 922 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
4f57c087 JF |
923 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
924 | * Called to setup 'tc' number of traffic classes in the net device. This | |
925 | * is always called from the stack with the rtnl lock held and netif tx | |
926 | * queues stopped. This allows the netdevice to perform queue management | |
927 | * safely. | |
c445477d | 928 | * |
e9bce845 YZ |
929 | * Fiber Channel over Ethernet (FCoE) offload functions. |
930 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
931 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
932 | * so the underlying device can perform whatever needed configuration or | |
933 | * initialization to support acceleration of FCoE traffic. | |
934 | * | |
935 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
936 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
937 | * so the underlying device can perform whatever needed clean-ups to | |
938 | * stop supporting acceleration of FCoE traffic. | |
939 | * | |
940 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
941 | * struct scatterlist *sgl, unsigned int sgc); | |
942 | * Called when the FCoE Initiator wants to initialize an I/O that | |
943 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
944 | * perform necessary setup and returns 1 to indicate the device is set up | |
945 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
946 | * | |
947 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
948 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
949 | * indicated by the FC exchange id 'xid', so the underlying device can | |
950 | * clean up and reuse resources for later DDP requests. | |
951 | * | |
952 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
953 | * struct scatterlist *sgl, unsigned int sgc); | |
954 | * Called when the FCoE Target wants to initialize an I/O that | |
955 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
956 | * perform necessary setup and returns 1 to indicate the device is set up | |
957 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
958 | * | |
68bad94e NP |
959 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
960 | * struct netdev_fcoe_hbainfo *hbainfo); | |
961 | * Called when the FCoE Protocol stack wants information on the underlying | |
962 | * device. This information is utilized by the FCoE protocol stack to | |
963 | * register attributes with Fiber Channel management service as per the | |
964 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
965 | * | |
e9bce845 YZ |
966 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
967 | * Called when the underlying device wants to override default World Wide | |
968 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
969 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
970 | * protocol stack to use. | |
971 | * | |
c445477d BH |
972 | * RFS acceleration. |
973 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
974 | * u16 rxq_index, u32 flow_id); | |
975 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
976 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
977 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 978 | * |
8b98a70c | 979 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
980 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
981 | * Called to make another netdev an underling. | |
982 | * | |
983 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
984 | * Called to release previously enslaved netdev. | |
5455c699 MM |
985 | * |
986 | * Feature/offload setting functions. | |
c8f44aff | 987 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
988 | * Called to update device configuration to new features. Passed |
989 | * feature set might be less than what was returned by ndo_fix_features()). | |
990 | * Must return >0 or -errno if it changed dev->features itself. | |
991 | * | |
edc7d573 | 992 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
993 | * struct net_device *dev, | |
f6f6424b | 994 | * const unsigned char *addr, u16 vid, u16 flags) |
77162022 | 995 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
996 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
997 | * struct net_device *dev, | |
f6f6424b | 998 | * const unsigned char *addr, u16 vid) |
77162022 JF |
999 | * Deletes the FDB entry from dev coresponding to addr. |
1000 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 JHS |
1001 | * struct net_device *dev, struct net_device *filter_dev, |
1002 | * int idx) | |
77162022 JF |
1003 | * Used to add FDB entries to dump requests. Implementers should add |
1004 | * entries to skb and update idx with the number of entries. | |
e5a55a89 | 1005 | * |
ad41faa8 ND |
1006 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
1007 | * u16 flags) | |
e5a55a89 | 1008 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
46c264da ND |
1009 | * struct net_device *dev, u32 filter_mask, |
1010 | * int nlflags) | |
ad41faa8 ND |
1011 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
1012 | * u16 flags); | |
4bf84c35 JP |
1013 | * |
1014 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
1015 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
1016 | * which do not represent real hardware may define this to allow their | |
1017 | * userspace components to manage their virtual carrier state. Devices | |
1018 | * that determine carrier state from physical hardware properties (eg | |
1019 | * network cables) or protocol-dependent mechanisms (eg | |
1020 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
1021 | * |
1022 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
02637fce | 1023 | * struct netdev_phys_item_id *ppid); |
66b52b0d JP |
1024 | * Called to get ID of physical port of this device. If driver does |
1025 | * not implement this, it is assumed that the hw is not able to have | |
1026 | * multiple net devices on single physical port. | |
53cf5275 JG |
1027 | * |
1028 | * void (*ndo_add_vxlan_port)(struct net_device *dev, | |
35e42379 | 1029 | * sa_family_t sa_family, __be16 port); |
5e82b4b2 BH |
1030 | * Called by vxlan to notify a driver about the UDP port and socket |
1031 | * address family that vxlan is listening to. It is called only when | |
53cf5275 JG |
1032 | * a new port starts listening. The operation is protected by the |
1033 | * vxlan_net->sock_lock. | |
1034 | * | |
a8170d2b | 1035 | * void (*ndo_add_geneve_port)(struct net_device *dev, |
5e82b4b2 | 1036 | * sa_family_t sa_family, __be16 port); |
a8170d2b SA |
1037 | * Called by geneve to notify a driver about the UDP port and socket |
1038 | * address family that geneve is listnening to. It is called only when | |
1039 | * a new port starts listening. The operation is protected by the | |
1040 | * geneve_net->sock_lock. | |
1041 | * | |
1042 | * void (*ndo_del_geneve_port)(struct net_device *dev, | |
5e82b4b2 | 1043 | * sa_family_t sa_family, __be16 port); |
a8170d2b SA |
1044 | * Called by geneve to notify the driver about a UDP port and socket |
1045 | * address family that geneve is not listening to anymore. The operation | |
1046 | * is protected by the geneve_net->sock_lock. | |
1047 | * | |
53cf5275 | 1048 | * void (*ndo_del_vxlan_port)(struct net_device *dev, |
35e42379 | 1049 | * sa_family_t sa_family, __be16 port); |
53cf5275 JG |
1050 | * Called by vxlan to notify the driver about a UDP port and socket |
1051 | * address family that vxlan is not listening to anymore. The operation | |
1052 | * is protected by the vxlan_net->sock_lock. | |
a6cc0cfa JF |
1053 | * |
1054 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, | |
1055 | * struct net_device *dev) | |
1056 | * Called by upper layer devices to accelerate switching or other | |
1057 | * station functionality into hardware. 'pdev is the lowerdev | |
1058 | * to use for the offload and 'dev' is the net device that will | |
1059 | * back the offload. Returns a pointer to the private structure | |
1060 | * the upper layer will maintain. | |
1061 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
1062 | * Called by upper layer device to delete the station created | |
1063 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
1064 | * the station and priv is the structure returned by the add | |
1065 | * operation. | |
1066 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, | |
1067 | * struct net_device *dev, | |
1068 | * void *priv); | |
1069 | * Callback to use for xmit over the accelerated station. This | |
1070 | * is used in place of ndo_start_xmit on accelerated net | |
1071 | * devices. | |
5e82b4b2 BH |
1072 | * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
1073 | * struct net_device *dev | |
1074 | * netdev_features_t features); | |
04ffcb25 | 1075 | * Called by core transmit path to determine if device is capable of |
5f35227e JG |
1076 | * performing offload operations on a given packet. This is to give |
1077 | * the device an opportunity to implement any restrictions that cannot | |
1078 | * be otherwise expressed by feature flags. The check is called with | |
1079 | * the set of features that the stack has calculated and it returns | |
1080 | * those the driver believes to be appropriate. | |
822b3b2e JF |
1081 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1082 | * int queue_index, u32 maxrate); | |
1083 | * Called when a user wants to set a max-rate limitation of specific | |
1084 | * TX queue. | |
a54acb3a ND |
1085 | * int (*ndo_get_iflink)(const struct net_device *dev); |
1086 | * Called to get the iflink value of this device. | |
d746d707 | 1087 | * void (*ndo_change_proto_down)(struct net_device *dev, |
5e82b4b2 | 1088 | * bool proto_down); |
d746d707 AK |
1089 | * This function is used to pass protocol port error state information |
1090 | * to the switch driver. The switch driver can react to the proto_down | |
1091 | * by doing a phys down on the associated switch port. | |
fc4099f1 PS |
1092 | * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
1093 | * This function is used to get egress tunnel information for given skb. | |
1094 | * This is useful for retrieving outer tunnel header parameters while | |
1095 | * sampling packet. | |
871b642a PA |
1096 | * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
1097 | * This function is used to specify the headroom that the skb must | |
1098 | * consider when allocation skb during packet reception. Setting | |
1099 | * appropriate rx headroom value allows avoiding skb head copy on | |
5e82b4b2 | 1100 | * forward. Setting a negative value resets the rx headroom to the |
871b642a | 1101 | * default value. |
d746d707 | 1102 | * |
d314774c SH |
1103 | */ |
1104 | struct net_device_ops { | |
1105 | int (*ndo_init)(struct net_device *dev); | |
1106 | void (*ndo_uninit)(struct net_device *dev); | |
1107 | int (*ndo_open)(struct net_device *dev); | |
1108 | int (*ndo_stop)(struct net_device *dev); | |
cdba756f ED |
1109 | netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1110 | struct net_device *dev); | |
1111 | netdev_features_t (*ndo_features_check)(struct sk_buff *skb, | |
1112 | struct net_device *dev, | |
1113 | netdev_features_t features); | |
00829823 | 1114 | u16 (*ndo_select_queue)(struct net_device *dev, |
f663dd9a | 1115 | struct sk_buff *skb, |
99932d4f DB |
1116 | void *accel_priv, |
1117 | select_queue_fallback_t fallback); | |
d314774c SH |
1118 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1119 | int flags); | |
d314774c | 1120 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1121 | int (*ndo_set_mac_address)(struct net_device *dev, |
1122 | void *addr); | |
d314774c | 1123 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1124 | int (*ndo_do_ioctl)(struct net_device *dev, |
1125 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1126 | int (*ndo_set_config)(struct net_device *dev, |
1127 | struct ifmap *map); | |
00829823 SH |
1128 | int (*ndo_change_mtu)(struct net_device *dev, |
1129 | int new_mtu); | |
1130 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1131 | struct neigh_parms *); | |
d314774c SH |
1132 | void (*ndo_tx_timeout) (struct net_device *dev); |
1133 | ||
28172739 ED |
1134 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
1135 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
1136 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1137 | ||
8e586137 | 1138 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1139 | __be16 proto, u16 vid); |
8e586137 | 1140 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1141 | __be16 proto, u16 vid); |
d314774c | 1142 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1143 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1144 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1145 | struct netpoll_info *info); |
0e34e931 | 1146 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 | 1147 | #endif |
e0d1095a | 1148 | #ifdef CONFIG_NET_RX_BUSY_POLL |
8b80cda5 | 1149 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 1150 | #endif |
95c26df8 WM |
1151 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1152 | int queue, u8 *mac); | |
1153 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
1154 | int queue, u16 vlan, u8 qos); | |
ed616689 SC |
1155 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1156 | int vf, int min_tx_rate, | |
1157 | int max_tx_rate); | |
5f8444a3 GR |
1158 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1159 | int vf, bool setting); | |
dd461d6a HS |
1160 | int (*ndo_set_vf_trust)(struct net_device *dev, |
1161 | int vf, bool setting); | |
95c26df8 WM |
1162 | int (*ndo_get_vf_config)(struct net_device *dev, |
1163 | int vf, | |
1164 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1165 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1166 | int vf, int link_state); | |
3b766cd8 EBE |
1167 | int (*ndo_get_vf_stats)(struct net_device *dev, |
1168 | int vf, | |
1169 | struct ifla_vf_stats | |
1170 | *vf_stats); | |
57b61080 SF |
1171 | int (*ndo_set_vf_port)(struct net_device *dev, |
1172 | int vf, | |
1173 | struct nlattr *port[]); | |
1174 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1175 | int vf, struct sk_buff *skb); | |
cc8e27cc EC |
1176 | int (*ndo_set_vf_guid)(struct net_device *dev, |
1177 | int vf, u64 guid, | |
1178 | int guid_type); | |
01a3d796 VZ |
1179 | int (*ndo_set_vf_rss_query_en)( |
1180 | struct net_device *dev, | |
1181 | int vf, bool setting); | |
16e5cc64 JF |
1182 | int (*ndo_setup_tc)(struct net_device *dev, |
1183 | u32 handle, | |
1184 | __be16 protocol, | |
1185 | struct tc_to_netdev *tc); | |
d11ead75 | 1186 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1187 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1188 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1189 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1190 | u16 xid, | |
1191 | struct scatterlist *sgl, | |
1192 | unsigned int sgc); | |
1193 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1194 | u16 xid); | |
6247e086 YZ |
1195 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1196 | u16 xid, | |
1197 | struct scatterlist *sgl, | |
1198 | unsigned int sgc); | |
68bad94e NP |
1199 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1200 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1201 | #endif |
1202 | ||
d11ead75 | 1203 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1204 | #define NETDEV_FCOE_WWNN 0 |
1205 | #define NETDEV_FCOE_WWPN 1 | |
1206 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1207 | u64 *wwn, int type); | |
4d288d57 | 1208 | #endif |
3c9c36bc | 1209 | |
c445477d BH |
1210 | #ifdef CONFIG_RFS_ACCEL |
1211 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1212 | const struct sk_buff *skb, | |
1213 | u16 rxq_index, | |
1214 | u32 flow_id); | |
1215 | #endif | |
fbaec0ea JP |
1216 | int (*ndo_add_slave)(struct net_device *dev, |
1217 | struct net_device *slave_dev); | |
1218 | int (*ndo_del_slave)(struct net_device *dev, | |
1219 | struct net_device *slave_dev); | |
c8f44aff MM |
1220 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1221 | netdev_features_t features); | |
5455c699 | 1222 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1223 | netdev_features_t features); |
da6a8fa0 | 1224 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1225 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1226 | |
1227 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1228 | struct nlattr *tb[], |
77162022 | 1229 | struct net_device *dev, |
6b6e2725 | 1230 | const unsigned char *addr, |
f6f6424b | 1231 | u16 vid, |
77162022 JF |
1232 | u16 flags); |
1233 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1234 | struct nlattr *tb[], |
77162022 | 1235 | struct net_device *dev, |
f6f6424b JP |
1236 | const unsigned char *addr, |
1237 | u16 vid); | |
77162022 JF |
1238 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1239 | struct netlink_callback *cb, | |
1240 | struct net_device *dev, | |
5d5eacb3 | 1241 | struct net_device *filter_dev, |
77162022 | 1242 | int idx); |
e5a55a89 JF |
1243 | |
1244 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
add511b3 RP |
1245 | struct nlmsghdr *nlh, |
1246 | u16 flags); | |
e5a55a89 JF |
1247 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1248 | u32 pid, u32 seq, | |
6cbdceeb | 1249 | struct net_device *dev, |
46c264da ND |
1250 | u32 filter_mask, |
1251 | int nlflags); | |
407af329 | 1252 | int (*ndo_bridge_dellink)(struct net_device *dev, |
add511b3 RP |
1253 | struct nlmsghdr *nlh, |
1254 | u16 flags); | |
4bf84c35 JP |
1255 | int (*ndo_change_carrier)(struct net_device *dev, |
1256 | bool new_carrier); | |
66b52b0d | 1257 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
02637fce | 1258 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
1259 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1260 | char *name, size_t len); | |
53cf5275 JG |
1261 | void (*ndo_add_vxlan_port)(struct net_device *dev, |
1262 | sa_family_t sa_family, | |
35e42379 | 1263 | __be16 port); |
53cf5275 JG |
1264 | void (*ndo_del_vxlan_port)(struct net_device *dev, |
1265 | sa_family_t sa_family, | |
35e42379 | 1266 | __be16 port); |
a8170d2b SA |
1267 | void (*ndo_add_geneve_port)(struct net_device *dev, |
1268 | sa_family_t sa_family, | |
1269 | __be16 port); | |
1270 | void (*ndo_del_geneve_port)(struct net_device *dev, | |
1271 | sa_family_t sa_family, | |
1272 | __be16 port); | |
a6cc0cfa JF |
1273 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1274 | struct net_device *dev); | |
1275 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1276 | void *priv); | |
1277 | ||
1278 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, | |
1279 | struct net_device *dev, | |
1280 | void *priv); | |
25175ba5 | 1281 | int (*ndo_get_lock_subclass)(struct net_device *dev); |
822b3b2e JF |
1282 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1283 | int queue_index, | |
1284 | u32 maxrate); | |
a54acb3a | 1285 | int (*ndo_get_iflink)(const struct net_device *dev); |
d746d707 AK |
1286 | int (*ndo_change_proto_down)(struct net_device *dev, |
1287 | bool proto_down); | |
fc4099f1 PS |
1288 | int (*ndo_fill_metadata_dst)(struct net_device *dev, |
1289 | struct sk_buff *skb); | |
871b642a PA |
1290 | void (*ndo_set_rx_headroom)(struct net_device *dev, |
1291 | int needed_headroom); | |
d314774c SH |
1292 | }; |
1293 | ||
7aa98047 LR |
1294 | /** |
1295 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1296 | * | |
1297 | * These are the &struct net_device, they are only set internally | |
1298 | * by drivers and used in the kernel. These flags are invisible to | |
5e82b4b2 | 1299 | * userspace; this means that the order of these flags can change |
7aa98047 LR |
1300 | * during any kernel release. |
1301 | * | |
1302 | * You should have a pretty good reason to be extending these flags. | |
1303 | * | |
1304 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1305 | * @IFF_EBRIDGE: Ethernet bridging device | |
7aa98047 | 1306 | * @IFF_BONDING: bonding master or slave |
7aa98047 | 1307 | * @IFF_ISATAP: ISATAP interface (RFC4214) |
7aa98047 LR |
1308 | * @IFF_WAN_HDLC: WAN HDLC device |
1309 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1310 | * release skb->dst | |
1311 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1312 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1313 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1314 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1315 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1316 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1317 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1318 | * @IFF_TEAM_PORT: device used as team port | |
1319 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1320 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1321 | * change when it's running | |
1322 | * @IFF_MACVLAN: Macvlan device | |
6d0e24cd LB |
1323 | * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
1324 | * underlying stacked devices | |
1325 | * @IFF_IPVLAN_MASTER: IPvlan master device | |
1326 | * @IFF_IPVLAN_SLAVE: IPvlan slave device | |
007979ea | 1327 | * @IFF_L3MDEV_MASTER: device is an L3 master device |
fa8187c9 | 1328 | * @IFF_NO_QUEUE: device can run without qdisc attached |
35d4e172 | 1329 | * @IFF_OPENVSWITCH: device is a Open vSwitch master |
fee6d4c7 | 1330 | * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
c981e421 | 1331 | * @IFF_TEAM: device is a team device |
d4ab4286 | 1332 | * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
871b642a PA |
1333 | * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
1334 | * entity (i.e. the master device for bridged veth) | |
3c175784 | 1335 | * @IFF_MACSEC: device is a MACsec device |
7aa98047 LR |
1336 | */ |
1337 | enum netdev_priv_flags { | |
1338 | IFF_802_1Q_VLAN = 1<<0, | |
1339 | IFF_EBRIDGE = 1<<1, | |
0dc1549b JP |
1340 | IFF_BONDING = 1<<2, |
1341 | IFF_ISATAP = 1<<3, | |
1342 | IFF_WAN_HDLC = 1<<4, | |
1343 | IFF_XMIT_DST_RELEASE = 1<<5, | |
1344 | IFF_DONT_BRIDGE = 1<<6, | |
1345 | IFF_DISABLE_NETPOLL = 1<<7, | |
1346 | IFF_MACVLAN_PORT = 1<<8, | |
1347 | IFF_BRIDGE_PORT = 1<<9, | |
1348 | IFF_OVS_DATAPATH = 1<<10, | |
1349 | IFF_TX_SKB_SHARING = 1<<11, | |
1350 | IFF_UNICAST_FLT = 1<<12, | |
1351 | IFF_TEAM_PORT = 1<<13, | |
1352 | IFF_SUPP_NOFCS = 1<<14, | |
1353 | IFF_LIVE_ADDR_CHANGE = 1<<15, | |
1354 | IFF_MACVLAN = 1<<16, | |
1355 | IFF_XMIT_DST_RELEASE_PERM = 1<<17, | |
1356 | IFF_IPVLAN_MASTER = 1<<18, | |
1357 | IFF_IPVLAN_SLAVE = 1<<19, | |
007979ea | 1358 | IFF_L3MDEV_MASTER = 1<<20, |
0dc1549b JP |
1359 | IFF_NO_QUEUE = 1<<21, |
1360 | IFF_OPENVSWITCH = 1<<22, | |
fee6d4c7 | 1361 | IFF_L3MDEV_SLAVE = 1<<23, |
c981e421 | 1362 | IFF_TEAM = 1<<24, |
d4ab4286 | 1363 | IFF_RXFH_CONFIGURED = 1<<25, |
871b642a | 1364 | IFF_PHONY_HEADROOM = 1<<26, |
3c175784 | 1365 | IFF_MACSEC = 1<<27, |
7aa98047 LR |
1366 | }; |
1367 | ||
1368 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1369 | #define IFF_EBRIDGE IFF_EBRIDGE | |
7aa98047 | 1370 | #define IFF_BONDING IFF_BONDING |
7aa98047 | 1371 | #define IFF_ISATAP IFF_ISATAP |
7aa98047 LR |
1372 | #define IFF_WAN_HDLC IFF_WAN_HDLC |
1373 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1374 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1375 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1376 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1377 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1378 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1379 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1380 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1381 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1382 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1383 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1384 | #define IFF_MACVLAN IFF_MACVLAN | |
02875878 | 1385 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
2ad7bf36 MB |
1386 | #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER |
1387 | #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE | |
007979ea | 1388 | #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
fa8187c9 | 1389 | #define IFF_NO_QUEUE IFF_NO_QUEUE |
35d4e172 | 1390 | #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
8f25348b | 1391 | #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
c981e421 | 1392 | #define IFF_TEAM IFF_TEAM |
d4ab4286 | 1393 | #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
3c175784 | 1394 | #define IFF_MACSEC IFF_MACSEC |
7aa98047 | 1395 | |
536721b1 KK |
1396 | /** |
1397 | * struct net_device - The DEVICE structure. | |
1398 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1399 | * data with strictly "high-level" data, and it has to know about | |
1400 | * almost every data structure used in the INET module. | |
1401 | * | |
1402 | * @name: This is the first field of the "visible" part of this structure | |
1403 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
1404 | * of the interface. | |
1405 | * | |
1406 | * @name_hlist: Device name hash chain, please keep it close to name[] | |
1407 | * @ifalias: SNMP alias | |
1408 | * @mem_end: Shared memory end | |
1409 | * @mem_start: Shared memory start | |
1410 | * @base_addr: Device I/O address | |
1411 | * @irq: Device IRQ number | |
1412 | * | |
14ffbbb8 TG |
1413 | * @carrier_changes: Stats to monitor carrier on<->off transitions |
1414 | * | |
536721b1 KK |
1415 | * @state: Generic network queuing layer state, see netdev_state_t |
1416 | * @dev_list: The global list of network devices | |
5e82b4b2 BH |
1417 | * @napi_list: List entry used for polling NAPI devices |
1418 | * @unreg_list: List entry when we are unregistering the | |
1419 | * device; see the function unregister_netdev | |
1420 | * @close_list: List entry used when we are closing the device | |
62d885fe BP |
1421 | * @ptype_all: Device-specific packet handlers for all protocols |
1422 | * @ptype_specific: Device-specific, protocol-specific packet handlers | |
536721b1 KK |
1423 | * |
1424 | * @adj_list: Directly linked devices, like slaves for bonding | |
1425 | * @all_adj_list: All linked devices, *including* neighbours | |
1426 | * @features: Currently active device features | |
1427 | * @hw_features: User-changeable features | |
1428 | * | |
1429 | * @wanted_features: User-requested features | |
1430 | * @vlan_features: Mask of features inheritable by VLAN devices | |
1431 | * | |
1432 | * @hw_enc_features: Mask of features inherited by encapsulating devices | |
1433 | * This field indicates what encapsulation | |
1434 | * offloads the hardware is capable of doing, | |
1435 | * and drivers will need to set them appropriately. | |
1436 | * | |
1437 | * @mpls_features: Mask of features inheritable by MPLS | |
1438 | * | |
1439 | * @ifindex: interface index | |
5e82b4b2 | 1440 | * @group: The group the device belongs to |
536721b1 KK |
1441 | * |
1442 | * @stats: Statistics struct, which was left as a legacy, use | |
1443 | * rtnl_link_stats64 instead | |
1444 | * | |
1445 | * @rx_dropped: Dropped packets by core network, | |
1446 | * do not use this in drivers | |
1447 | * @tx_dropped: Dropped packets by core network, | |
1448 | * do not use this in drivers | |
6e7333d3 JW |
1449 | * @rx_nohandler: nohandler dropped packets by core network on |
1450 | * inactive devices, do not use this in drivers | |
536721b1 | 1451 | * |
536721b1 KK |
1452 | * @wireless_handlers: List of functions to handle Wireless Extensions, |
1453 | * instead of ioctl, | |
1454 | * see <net/iw_handler.h> for details. | |
1455 | * @wireless_data: Instance data managed by the core of wireless extensions | |
1456 | * | |
1457 | * @netdev_ops: Includes several pointers to callbacks, | |
1458 | * if one wants to override the ndo_*() functions | |
1459 | * @ethtool_ops: Management operations | |
d476059e | 1460 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
536721b1 KK |
1461 | * of Layer 2 headers. |
1462 | * | |
1463 | * @flags: Interface flags (a la BSD) | |
1464 | * @priv_flags: Like 'flags' but invisible to userspace, | |
1465 | * see if.h for the definitions | |
1466 | * @gflags: Global flags ( kept as legacy ) | |
1467 | * @padded: How much padding added by alloc_netdev() | |
1468 | * @operstate: RFC2863 operstate | |
1469 | * @link_mode: Mapping policy to operstate | |
1470 | * @if_port: Selectable AUI, TP, ... | |
1471 | * @dma: DMA channel | |
1472 | * @mtu: Interface MTU value | |
1473 | * @type: Interface hardware type | |
2793a23a | 1474 | * @hard_header_len: Maximum hardware header length. |
536721b1 KK |
1475 | * |
1476 | * @needed_headroom: Extra headroom the hardware may need, but not in all | |
1477 | * cases can this be guaranteed | |
1478 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all | |
1479 | * cases can this be guaranteed. Some cases also use | |
1480 | * LL_MAX_HEADER instead to allocate the skb | |
1481 | * | |
1482 | * interface address info: | |
1483 | * | |
1484 | * @perm_addr: Permanent hw address | |
1485 | * @addr_assign_type: Hw address assignment type | |
1486 | * @addr_len: Hardware address length | |
1487 | * @neigh_priv_len; Used in neigh_alloc(), | |
1488 | * initialized only in atm/clip.c | |
1489 | * @dev_id: Used to differentiate devices that share | |
1490 | * the same link layer address | |
1491 | * @dev_port: Used to differentiate devices that share | |
1492 | * the same function | |
1493 | * @addr_list_lock: XXX: need comments on this one | |
5e82b4b2 | 1494 | * @uc_promisc: Counter that indicates promiscuous mode |
536721b1 KK |
1495 | * has been enabled due to the need to listen to |
1496 | * additional unicast addresses in a device that | |
1497 | * does not implement ndo_set_rx_mode() | |
14ffbbb8 TG |
1498 | * @uc: unicast mac addresses |
1499 | * @mc: multicast mac addresses | |
1500 | * @dev_addrs: list of device hw addresses | |
1501 | * @queues_kset: Group of all Kobjects in the Tx and RX queues | |
5e82b4b2 BH |
1502 | * @promiscuity: Number of times the NIC is told to work in |
1503 | * promiscuous mode; if it becomes 0 the NIC will | |
1504 | * exit promiscuous mode | |
536721b1 KK |
1505 | * @allmulti: Counter, enables or disables allmulticast mode |
1506 | * | |
1507 | * @vlan_info: VLAN info | |
1508 | * @dsa_ptr: dsa specific data | |
1509 | * @tipc_ptr: TIPC specific data | |
1510 | * @atalk_ptr: AppleTalk link | |
1511 | * @ip_ptr: IPv4 specific data | |
1512 | * @dn_ptr: DECnet specific data | |
1513 | * @ip6_ptr: IPv6 specific data | |
1514 | * @ax25_ptr: AX.25 specific data | |
1515 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering | |
1516 | * | |
1517 | * @last_rx: Time of last Rx | |
1518 | * @dev_addr: Hw address (before bcast, | |
1519 | * because most packets are unicast) | |
1520 | * | |
1521 | * @_rx: Array of RX queues | |
1522 | * @num_rx_queues: Number of RX queues | |
1523 | * allocated at register_netdev() time | |
1524 | * @real_num_rx_queues: Number of RX queues currently active in device | |
1525 | * | |
1526 | * @rx_handler: handler for received packets | |
1527 | * @rx_handler_data: XXX: need comments on this one | |
1528 | * @ingress_queue: XXX: need comments on this one | |
1529 | * @broadcast: hw bcast address | |
1530 | * | |
14ffbbb8 TG |
1531 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, |
1532 | * indexed by RX queue number. Assigned by driver. | |
1533 | * This must only be set if the ndo_rx_flow_steer | |
1534 | * operation is defined | |
1535 | * @index_hlist: Device index hash chain | |
1536 | * | |
536721b1 KK |
1537 | * @_tx: Array of TX queues |
1538 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time | |
1539 | * @real_num_tx_queues: Number of TX queues currently active in device | |
1540 | * @qdisc: Root qdisc from userspace point of view | |
1541 | * @tx_queue_len: Max frames per queue allowed | |
1542 | * @tx_global_lock: XXX: need comments on this one | |
1543 | * | |
1544 | * @xps_maps: XXX: need comments on this one | |
1545 | * | |
0c4f691f SF |
1546 | * @offload_fwd_mark: Offload device fwding mark |
1547 | * | |
536721b1 | 1548 | * @watchdog_timeo: Represents the timeout that is used by |
5e82b4b2 | 1549 | * the watchdog (see dev_watchdog()) |
536721b1 KK |
1550 | * @watchdog_timer: List of timers |
1551 | * | |
1552 | * @pcpu_refcnt: Number of references to this device | |
1553 | * @todo_list: Delayed register/unregister | |
536721b1 KK |
1554 | * @link_watch_list: XXX: need comments on this one |
1555 | * | |
1556 | * @reg_state: Register/unregister state machine | |
1557 | * @dismantle: Device is going to be freed | |
1558 | * @rtnl_link_state: This enum represents the phases of creating | |
1559 | * a new link | |
1560 | * | |
1561 | * @destructor: Called from unregister, | |
1562 | * can be used to call free_netdev | |
1563 | * @npinfo: XXX: need comments on this one | |
1564 | * @nd_net: Network namespace this network device is inside | |
1565 | * | |
1566 | * @ml_priv: Mid-layer private | |
1567 | * @lstats: Loopback statistics | |
1568 | * @tstats: Tunnel statistics | |
1569 | * @dstats: Dummy statistics | |
1570 | * @vstats: Virtual ethernet statistics | |
1571 | * | |
1572 | * @garp_port: GARP | |
1573 | * @mrp_port: MRP | |
1574 | * | |
1575 | * @dev: Class/net/name entry | |
1576 | * @sysfs_groups: Space for optional device, statistics and wireless | |
1577 | * sysfs groups | |
1578 | * | |
1579 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes | |
1580 | * @rtnl_link_ops: Rtnl_link_ops | |
1581 | * | |
1582 | * @gso_max_size: Maximum size of generic segmentation offload | |
1583 | * @gso_max_segs: Maximum number of segments that can be passed to the | |
1584 | * NIC for GSO | |
1585 | * | |
1586 | * @dcbnl_ops: Data Center Bridging netlink ops | |
1587 | * @num_tc: Number of traffic classes in the net device | |
1588 | * @tc_to_txq: XXX: need comments on this one | |
1589 | * @prio_tc_map XXX: need comments on this one | |
1590 | * | |
1591 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp | |
1592 | * | |
1593 | * @priomap: XXX: need comments on this one | |
1594 | * @phydev: Physical device may attach itself | |
1595 | * for hardware timestamping | |
1596 | * | |
1597 | * @qdisc_tx_busylock: XXX: need comments on this one | |
1598 | * | |
d746d707 AK |
1599 | * @proto_down: protocol port state information can be sent to the |
1600 | * switch driver and used to set the phys state of the | |
1601 | * switch port. | |
1602 | * | |
1da177e4 LT |
1603 | * FIXME: cleanup struct net_device such that network protocol info |
1604 | * moves out. | |
1605 | */ | |
1606 | ||
d94d9fee | 1607 | struct net_device { |
1da177e4 | 1608 | char name[IFNAMSIZ]; |
9356b8fc | 1609 | struct hlist_node name_hlist; |
0b815a1a | 1610 | char *ifalias; |
1da177e4 LT |
1611 | /* |
1612 | * I/O specific fields | |
1613 | * FIXME: Merge these and struct ifmap into one | |
1614 | */ | |
536721b1 KK |
1615 | unsigned long mem_end; |
1616 | unsigned long mem_start; | |
1617 | unsigned long base_addr; | |
1618 | int irq; | |
1da177e4 | 1619 | |
14ffbbb8 TG |
1620 | atomic_t carrier_changes; |
1621 | ||
1da177e4 | 1622 | /* |
536721b1 KK |
1623 | * Some hardware also needs these fields (state,dev_list, |
1624 | * napi_list,unreg_list,close_list) but they are not | |
1da177e4 LT |
1625 | * part of the usual set specified in Space.c. |
1626 | */ | |
1627 | ||
1da177e4 LT |
1628 | unsigned long state; |
1629 | ||
7562f876 | 1630 | struct list_head dev_list; |
bea3348e | 1631 | struct list_head napi_list; |
44a0873d | 1632 | struct list_head unreg_list; |
5cde2829 | 1633 | struct list_head close_list; |
7866a621 SN |
1634 | struct list_head ptype_all; |
1635 | struct list_head ptype_specific; | |
2f268f12 | 1636 | |
2f268f12 VF |
1637 | struct { |
1638 | struct list_head upper; | |
1639 | struct list_head lower; | |
1640 | } adj_list; | |
1641 | ||
2f268f12 VF |
1642 | struct { |
1643 | struct list_head upper; | |
1644 | struct list_head lower; | |
1645 | } all_adj_list; | |
4c3d5e7b | 1646 | |
c8f44aff | 1647 | netdev_features_t features; |
c8f44aff | 1648 | netdev_features_t hw_features; |
c8f44aff | 1649 | netdev_features_t wanted_features; |
c8f44aff | 1650 | netdev_features_t vlan_features; |
6a674e9c | 1651 | netdev_features_t hw_enc_features; |
0d89d203 | 1652 | netdev_features_t mpls_features; |
802ab55a | 1653 | netdev_features_t gso_partial_features; |
04ed3e74 | 1654 | |
1da177e4 | 1655 | int ifindex; |
7a66bbc9 | 1656 | int group; |
1da177e4 | 1657 | |
c45d286e | 1658 | struct net_device_stats stats; |
015f0688 | 1659 | |
015f0688 ED |
1660 | atomic_long_t rx_dropped; |
1661 | atomic_long_t tx_dropped; | |
6e7333d3 | 1662 | atomic_long_t rx_nohandler; |
1da177e4 | 1663 | |
b86e0280 | 1664 | #ifdef CONFIG_WIRELESS_EXT |
5e82b4b2 BH |
1665 | const struct iw_handler_def *wireless_handlers; |
1666 | struct iw_public_data *wireless_data; | |
b86e0280 | 1667 | #endif |
d314774c | 1668 | const struct net_device_ops *netdev_ops; |
76fd8593 | 1669 | const struct ethtool_ops *ethtool_ops; |
4170604f | 1670 | #ifdef CONFIG_NET_SWITCHDEV |
9d47c0a2 | 1671 | const struct switchdev_ops *switchdev_ops; |
4170604f | 1672 | #endif |
1b69c6d0 DA |
1673 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1674 | const struct l3mdev_ops *l3mdev_ops; | |
1675 | #endif | |
1da177e4 | 1676 | |
3b04ddde SH |
1677 | const struct header_ops *header_ops; |
1678 | ||
536721b1 KK |
1679 | unsigned int flags; |
1680 | unsigned int priv_flags; | |
1681 | ||
1da177e4 | 1682 | unsigned short gflags; |
536721b1 | 1683 | unsigned short padded; |
1da177e4 | 1684 | |
536721b1 KK |
1685 | unsigned char operstate; |
1686 | unsigned char link_mode; | |
b00055aa | 1687 | |
536721b1 KK |
1688 | unsigned char if_port; |
1689 | unsigned char dma; | |
bdc220da | 1690 | |
536721b1 KK |
1691 | unsigned int mtu; |
1692 | unsigned short type; | |
1693 | unsigned short hard_header_len; | |
1da177e4 | 1694 | |
f5184d26 JB |
1695 | unsigned short needed_headroom; |
1696 | unsigned short needed_tailroom; | |
1697 | ||
1da177e4 | 1698 | /* Interface address info. */ |
536721b1 KK |
1699 | unsigned char perm_addr[MAX_ADDR_LEN]; |
1700 | unsigned char addr_assign_type; | |
1701 | unsigned char addr_len; | |
a0a9663d | 1702 | unsigned short neigh_priv_len; |
536721b1 KK |
1703 | unsigned short dev_id; |
1704 | unsigned short dev_port; | |
ccffad25 | 1705 | spinlock_t addr_list_lock; |
14ffbbb8 TG |
1706 | unsigned char name_assign_type; |
1707 | bool uc_promisc; | |
536721b1 KK |
1708 | struct netdev_hw_addr_list uc; |
1709 | struct netdev_hw_addr_list mc; | |
1710 | struct netdev_hw_addr_list dev_addrs; | |
1711 | ||
4c3d5e7b ED |
1712 | #ifdef CONFIG_SYSFS |
1713 | struct kset *queues_kset; | |
1714 | #endif | |
9d45abe1 WC |
1715 | unsigned int promiscuity; |
1716 | unsigned int allmulti; | |
1da177e4 | 1717 | |
1da177e4 | 1718 | |
5e82b4b2 | 1719 | /* Protocol-specific pointers */ |
65ac6a5f | 1720 | |
d11ead75 | 1721 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
536721b1 | 1722 | struct vlan_info __rcu *vlan_info; |
65ac6a5f | 1723 | #endif |
34a430d7 | 1724 | #if IS_ENABLED(CONFIG_NET_DSA) |
536721b1 | 1725 | struct dsa_switch_tree *dsa_ptr; |
37cb0620 YX |
1726 | #endif |
1727 | #if IS_ENABLED(CONFIG_TIPC) | |
536721b1 | 1728 | struct tipc_bearer __rcu *tipc_ptr; |
91da11f8 | 1729 | #endif |
536721b1 KK |
1730 | void *atalk_ptr; |
1731 | struct in_device __rcu *ip_ptr; | |
1732 | struct dn_dev __rcu *dn_ptr; | |
1733 | struct inet6_dev __rcu *ip6_ptr; | |
1734 | void *ax25_ptr; | |
1735 | struct wireless_dev *ieee80211_ptr; | |
98a18b6f | 1736 | struct wpan_dev *ieee802154_ptr; |
03c57747 RS |
1737 | #if IS_ENABLED(CONFIG_MPLS_ROUTING) |
1738 | struct mpls_dev __rcu *mpls_ptr; | |
1739 | #endif | |
1da177e4 | 1740 | |
9356b8fc | 1741 | /* |
cd13539b | 1742 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1743 | */ |
536721b1 | 1744 | unsigned long last_rx; |
4dc89133 | 1745 | |
9356b8fc | 1746 | /* Interface address info used in eth_type_trans() */ |
536721b1 | 1747 | unsigned char *dev_addr; |
f001fde5 | 1748 | |
a953be53 | 1749 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1750 | struct netdev_rx_queue *_rx; |
1751 | ||
0a9627f2 | 1752 | unsigned int num_rx_queues; |
62fe0b40 | 1753 | unsigned int real_num_rx_queues; |
df334545 | 1754 | #endif |
0a9627f2 | 1755 | |
3b47d303 | 1756 | unsigned long gro_flush_timeout; |
61391cde | 1757 | rx_handler_func_t __rcu *rx_handler; |
1758 | void __rcu *rx_handler_data; | |
e8a0464c | 1759 | |
4cda01e8 | 1760 | #ifdef CONFIG_NET_CLS_ACT |
d2788d34 DB |
1761 | struct tcf_proto __rcu *ingress_cl_list; |
1762 | #endif | |
24824a09 | 1763 | struct netdev_queue __rcu *ingress_queue; |
e687ad60 PN |
1764 | #ifdef CONFIG_NETFILTER_INGRESS |
1765 | struct list_head nf_hooks_ingress; | |
1766 | #endif | |
d2788d34 | 1767 | |
536721b1 | 1768 | unsigned char broadcast[MAX_ADDR_LEN]; |
14ffbbb8 TG |
1769 | #ifdef CONFIG_RFS_ACCEL |
1770 | struct cpu_rmap *rx_cpu_rmap; | |
1771 | #endif | |
1772 | struct hlist_node index_hlist; | |
cd13539b ED |
1773 | |
1774 | /* | |
1775 | * Cache lines mostly used on transmit path | |
1776 | */ | |
e8a0464c DM |
1777 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
1778 | unsigned int num_tx_queues; | |
fd2ea0a7 | 1779 | unsigned int real_num_tx_queues; |
af356afa | 1780 | struct Qdisc *qdisc; |
536721b1 | 1781 | unsigned long tx_queue_len; |
c3f26a26 | 1782 | spinlock_t tx_global_lock; |
14ffbbb8 | 1783 | int watchdog_timeo; |
cd13539b | 1784 | |
bf264145 | 1785 | #ifdef CONFIG_XPS |
a4177869 | 1786 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1787 | #endif |
1f211a1b DB |
1788 | #ifdef CONFIG_NET_CLS_ACT |
1789 | struct tcf_proto __rcu *egress_cl_list; | |
1790 | #endif | |
0c4f691f SF |
1791 | #ifdef CONFIG_NET_SWITCHDEV |
1792 | u32 offload_fwd_mark; | |
1793 | #endif | |
1794 | ||
9356b8fc | 1795 | /* These may be needed for future network-power-down code. */ |
9356b8fc ED |
1796 | struct timer_list watchdog_timer; |
1797 | ||
29b4433d | 1798 | int __percpu *pcpu_refcnt; |
1da177e4 | 1799 | struct list_head todo_list; |
1da177e4 | 1800 | |
e014debe | 1801 | struct list_head link_watch_list; |
572a103d | 1802 | |
1da177e4 | 1803 | enum { NETREG_UNINITIALIZED=0, |
b17a7c17 | 1804 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1805 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1806 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1807 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1808 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1809 | } reg_state:8; |
1810 | ||
536721b1 | 1811 | bool dismantle; |
a2835763 PM |
1812 | |
1813 | enum { | |
1814 | RTNL_LINK_INITIALIZED, | |
1815 | RTNL_LINK_INITIALIZING, | |
1816 | } rtnl_link_state:16; | |
1da177e4 | 1817 | |
d314774c | 1818 | void (*destructor)(struct net_device *dev); |
1da177e4 | 1819 | |
1da177e4 | 1820 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1821 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1822 | #endif |
eae792b7 | 1823 | |
0c5c9fb5 | 1824 | possible_net_t nd_net; |
4a1c5371 | 1825 | |
4951704b | 1826 | /* mid-layer private */ |
a7855c78 | 1827 | union { |
536721b1 KK |
1828 | void *ml_priv; |
1829 | struct pcpu_lstats __percpu *lstats; | |
8f84985f | 1830 | struct pcpu_sw_netstats __percpu *tstats; |
536721b1 KK |
1831 | struct pcpu_dstats __percpu *dstats; |
1832 | struct pcpu_vstats __percpu *vstats; | |
a7855c78 | 1833 | }; |
536721b1 | 1834 | |
3cc77ec7 | 1835 | struct garp_port __rcu *garp_port; |
febf018d | 1836 | struct mrp_port __rcu *mrp_port; |
1da177e4 | 1837 | |
5e82b4b2 | 1838 | struct device dev; |
0c509a6c | 1839 | const struct attribute_group *sysfs_groups[4]; |
a953be53 | 1840 | const struct attribute_group *sysfs_rx_queue_group; |
38f7b870 | 1841 | |
38f7b870 | 1842 | const struct rtnl_link_ops *rtnl_link_ops; |
f25f4e44 | 1843 | |
82cc1a7a PWJ |
1844 | /* for setting kernel sock attribute on TCP connection setup */ |
1845 | #define GSO_MAX_SIZE 65536 | |
1846 | unsigned int gso_max_size; | |
30b678d8 BH |
1847 | #define GSO_MAX_SEGS 65535 |
1848 | u16 gso_max_segs; | |
743b03a8 | 1849 | |
7a6b6f51 | 1850 | #ifdef CONFIG_DCB |
32953543 | 1851 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1852 | #endif |
5e82b4b2 BH |
1853 | u8 num_tc; |
1854 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1855 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1856 | |
d11ead75 | 1857 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 | 1858 | unsigned int fcoe_ddp_xid; |
5bc1421e | 1859 | #endif |
86f8515f | 1860 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1861 | struct netprio_map __rcu *priomap; |
4d288d57 | 1862 | #endif |
5e82b4b2 BH |
1863 | struct phy_device *phydev; |
1864 | struct lock_class_key *qdisc_tx_busylock; | |
1865 | bool proto_down; | |
1da177e4 | 1866 | }; |
43cb76d9 | 1867 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1868 | |
1869 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1870 | |
4f57c087 JF |
1871 | static inline |
1872 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1873 | { | |
1874 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1875 | } | |
1876 | ||
1877 | static inline | |
1878 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1879 | { | |
1880 | if (tc >= dev->num_tc) | |
1881 | return -EINVAL; | |
1882 | ||
1883 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1884 | return 0; | |
1885 | } | |
1886 | ||
1887 | static inline | |
1888 | void netdev_reset_tc(struct net_device *dev) | |
1889 | { | |
1890 | dev->num_tc = 0; | |
1891 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1892 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1893 | } | |
1894 | ||
1895 | static inline | |
1896 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1897 | { | |
1898 | if (tc >= dev->num_tc) | |
1899 | return -EINVAL; | |
1900 | ||
1901 | dev->tc_to_txq[tc].count = count; | |
1902 | dev->tc_to_txq[tc].offset = offset; | |
1903 | return 0; | |
1904 | } | |
1905 | ||
1906 | static inline | |
1907 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1908 | { | |
1909 | if (num_tc > TC_MAX_QUEUE) | |
1910 | return -EINVAL; | |
1911 | ||
1912 | dev->num_tc = num_tc; | |
1913 | return 0; | |
1914 | } | |
1915 | ||
1916 | static inline | |
1917 | int netdev_get_num_tc(struct net_device *dev) | |
1918 | { | |
1919 | return dev->num_tc; | |
1920 | } | |
1921 | ||
e8a0464c DM |
1922 | static inline |
1923 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1924 | unsigned int index) | |
1925 | { | |
1926 | return &dev->_tx[index]; | |
1927 | } | |
1928 | ||
10c51b56 DB |
1929 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
1930 | const struct sk_buff *skb) | |
1931 | { | |
1932 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); | |
1933 | } | |
1934 | ||
e8a0464c DM |
1935 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
1936 | void (*f)(struct net_device *, | |
1937 | struct netdev_queue *, | |
1938 | void *), | |
1939 | void *arg) | |
1940 | { | |
1941 | unsigned int i; | |
1942 | ||
1943 | for (i = 0; i < dev->num_tx_queues; i++) | |
1944 | f(dev, &dev->_tx[i], arg); | |
1945 | } | |
1946 | ||
f629d208 | 1947 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
1948 | struct sk_buff *skb, |
1949 | void *accel_priv); | |
8c4c49df | 1950 | |
871b642a PA |
1951 | /* returns the headroom that the master device needs to take in account |
1952 | * when forwarding to this dev | |
1953 | */ | |
1954 | static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) | |
1955 | { | |
1956 | return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; | |
1957 | } | |
1958 | ||
1959 | static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) | |
1960 | { | |
1961 | if (dev->netdev_ops->ndo_set_rx_headroom) | |
1962 | dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); | |
1963 | } | |
1964 | ||
1965 | /* set the device rx headroom to the dev's default */ | |
1966 | static inline void netdev_reset_rx_headroom(struct net_device *dev) | |
1967 | { | |
1968 | netdev_set_rx_headroom(dev, -1); | |
1969 | } | |
1970 | ||
c346dca1 YH |
1971 | /* |
1972 | * Net namespace inlines | |
1973 | */ | |
1974 | static inline | |
1975 | struct net *dev_net(const struct net_device *dev) | |
1976 | { | |
c2d9ba9b | 1977 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1978 | } |
1979 | ||
1980 | static inline | |
f5aa23fd | 1981 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 | 1982 | { |
0c5c9fb5 | 1983 | write_pnet(&dev->nd_net, net); |
c346dca1 YH |
1984 | } |
1985 | ||
3e8a72d1 | 1986 | static inline bool netdev_uses_dsa(struct net_device *dev) |
cf85d08f | 1987 | { |
3fc88677 | 1988 | #if IS_ENABLED(CONFIG_NET_DSA) |
5aed85ce FF |
1989 | if (dev->dsa_ptr != NULL) |
1990 | return dsa_uses_tagged_protocol(dev->dsa_ptr); | |
396138f0 | 1991 | #endif |
5aed85ce | 1992 | return false; |
396138f0 LB |
1993 | } |
1994 | ||
bea3348e SH |
1995 | /** |
1996 | * netdev_priv - access network device private data | |
1997 | * @dev: network device | |
1998 | * | |
1999 | * Get network device private data | |
2000 | */ | |
6472ce60 | 2001 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 2002 | { |
1ce8e7b5 | 2003 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
2004 | } |
2005 | ||
1da177e4 LT |
2006 | /* Set the sysfs physical device reference for the network logical device |
2007 | * if set prior to registration will cause a symlink during initialization. | |
2008 | */ | |
43cb76d9 | 2009 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 2010 | |
384912ed | 2011 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 2012 | * fine-grained identification of different network device types. For |
5e82b4b2 | 2013 | * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
384912ed MH |
2014 | */ |
2015 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
2016 | ||
82dc3c63 ED |
2017 | /* Default NAPI poll() weight |
2018 | * Device drivers are strongly advised to not use bigger value | |
2019 | */ | |
2020 | #define NAPI_POLL_WEIGHT 64 | |
2021 | ||
3b582cc1 | 2022 | /** |
5e82b4b2 | 2023 | * netif_napi_add - initialize a NAPI context |
3b582cc1 | 2024 | * @dev: network device |
5e82b4b2 | 2025 | * @napi: NAPI context |
3b582cc1 SH |
2026 | * @poll: polling function |
2027 | * @weight: default weight | |
2028 | * | |
5e82b4b2 BH |
2029 | * netif_napi_add() must be used to initialize a NAPI context prior to calling |
2030 | * *any* of the other NAPI-related functions. | |
3b582cc1 | 2031 | */ |
d565b0a1 HX |
2032 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
2033 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 2034 | |
d64b5e85 | 2035 | /** |
5e82b4b2 | 2036 | * netif_tx_napi_add - initialize a NAPI context |
d64b5e85 | 2037 | * @dev: network device |
5e82b4b2 | 2038 | * @napi: NAPI context |
d64b5e85 ED |
2039 | * @poll: polling function |
2040 | * @weight: default weight | |
2041 | * | |
2042 | * This variant of netif_napi_add() should be used from drivers using NAPI | |
2043 | * to exclusively poll a TX queue. | |
2044 | * This will avoid we add it into napi_hash[], thus polluting this hash table. | |
2045 | */ | |
2046 | static inline void netif_tx_napi_add(struct net_device *dev, | |
2047 | struct napi_struct *napi, | |
2048 | int (*poll)(struct napi_struct *, int), | |
2049 | int weight) | |
2050 | { | |
2051 | set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); | |
2052 | netif_napi_add(dev, napi, poll, weight); | |
2053 | } | |
2054 | ||
d8156534 | 2055 | /** |
5e82b4b2 BH |
2056 | * netif_napi_del - remove a NAPI context |
2057 | * @napi: NAPI context | |
d8156534 | 2058 | * |
5e82b4b2 | 2059 | * netif_napi_del() removes a NAPI context from the network device NAPI list |
d8156534 | 2060 | */ |
d565b0a1 HX |
2061 | void netif_napi_del(struct napi_struct *napi); |
2062 | ||
2063 | struct napi_gro_cb { | |
78a478d0 | 2064 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
5e82b4b2 | 2065 | void *frag0; |
78a478d0 | 2066 | |
7489594c HX |
2067 | /* Length of frag0. */ |
2068 | unsigned int frag0_len; | |
2069 | ||
86911732 | 2070 | /* This indicates where we are processing relative to skb->data. */ |
5e82b4b2 | 2071 | int data_offset; |
86911732 | 2072 | |
d565b0a1 | 2073 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
2074 | u16 flush; |
2075 | ||
2076 | /* Save the IP ID here and check when we get to the transport layer */ | |
2077 | u16 flush_id; | |
d565b0a1 HX |
2078 | |
2079 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
2080 | u16 count; |
2081 | ||
15e2396d TH |
2082 | /* Start offset for remote checksum offload */ |
2083 | u16 gro_remcsum_start; | |
2084 | ||
2e71a6f8 ED |
2085 | /* jiffies when first packet was created/queued */ |
2086 | unsigned long age; | |
86347245 | 2087 | |
afe93325 | 2088 | /* Used in ipv6_gro_receive() and foo-over-udp */ |
b582ef09 OG |
2089 | u16 proto; |
2090 | ||
baa32ff4 TH |
2091 | /* This is non-zero if the packet may be of the same flow. */ |
2092 | u8 same_flow:1; | |
2093 | ||
fac8e0f5 JG |
2094 | /* Used in tunnel GRO receive */ |
2095 | u8 encap_mark:1; | |
573e8fca TH |
2096 | |
2097 | /* GRO checksum is valid */ | |
2098 | u8 csum_valid:1; | |
2099 | ||
662880f4 TH |
2100 | /* Number of checksums via CHECKSUM_UNNECESSARY */ |
2101 | u8 csum_cnt:3; | |
c3c7c254 | 2102 | |
baa32ff4 TH |
2103 | /* Free the skb? */ |
2104 | u8 free:2; | |
2105 | #define NAPI_GRO_FREE 1 | |
2106 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2107 | ||
efc98d08 TH |
2108 | /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
2109 | u8 is_ipv6:1; | |
2110 | ||
a0ca153f AD |
2111 | /* Used in GRE, set in fou/gue_gro_receive */ |
2112 | u8 is_fou:1; | |
2113 | ||
1530545e AD |
2114 | /* Used to determine if flush_id can be ignored */ |
2115 | u8 is_atomic:1; | |
2116 | ||
2117 | /* 5 bit hole */ | |
baa32ff4 | 2118 | |
bf5a755f JC |
2119 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
2120 | __wsum csum; | |
2121 | ||
c3c7c254 ED |
2122 | /* used in skb_gro_receive() slow path */ |
2123 | struct sk_buff *last; | |
d565b0a1 HX |
2124 | }; |
2125 | ||
2126 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 2127 | |
1da177e4 | 2128 | struct packet_type { |
f2ccd8fa DM |
2129 | __be16 type; /* This is really htons(ether_type). */ |
2130 | struct net_device *dev; /* NULL is wildcarded here */ | |
2131 | int (*func) (struct sk_buff *, | |
2132 | struct net_device *, | |
2133 | struct packet_type *, | |
2134 | struct net_device *); | |
c0de08d0 EL |
2135 | bool (*id_match)(struct packet_type *ptype, |
2136 | struct sock *sk); | |
1da177e4 LT |
2137 | void *af_packet_priv; |
2138 | struct list_head list; | |
2139 | }; | |
2140 | ||
f191a1d1 | 2141 | struct offload_callbacks { |
576a30eb | 2142 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 2143 | netdev_features_t features); |
d565b0a1 | 2144 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
a2b12f3c | 2145 | struct sk_buff *skb); |
299603e8 | 2146 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
2147 | }; |
2148 | ||
2149 | struct packet_offload { | |
2150 | __be16 type; /* This is really htons(ether_type). */ | |
bdef7de4 | 2151 | u16 priority; |
f191a1d1 VY |
2152 | struct offload_callbacks callbacks; |
2153 | struct list_head list; | |
1da177e4 LT |
2154 | }; |
2155 | ||
5e82b4b2 | 2156 | /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
8f84985f LR |
2157 | struct pcpu_sw_netstats { |
2158 | u64 rx_packets; | |
2159 | u64 rx_bytes; | |
2160 | u64 tx_packets; | |
2161 | u64 tx_bytes; | |
2162 | struct u64_stats_sync syncp; | |
2163 | }; | |
2164 | ||
aabc92bb PNA |
2165 | #define __netdev_alloc_pcpu_stats(type, gfp) \ |
2166 | ({ \ | |
2167 | typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ | |
2168 | if (pcpu_stats) { \ | |
2169 | int __cpu; \ | |
2170 | for_each_possible_cpu(__cpu) { \ | |
2171 | typeof(type) *stat; \ | |
2172 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ | |
2173 | u64_stats_init(&stat->syncp); \ | |
2174 | } \ | |
2175 | } \ | |
2176 | pcpu_stats; \ | |
1c213bd2 WC |
2177 | }) |
2178 | ||
aabc92bb | 2179 | #define netdev_alloc_pcpu_stats(type) \ |
326fcfa5 | 2180 | __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
aabc92bb | 2181 | |
764f5e54 JP |
2182 | enum netdev_lag_tx_type { |
2183 | NETDEV_LAG_TX_TYPE_UNKNOWN, | |
2184 | NETDEV_LAG_TX_TYPE_RANDOM, | |
2185 | NETDEV_LAG_TX_TYPE_BROADCAST, | |
2186 | NETDEV_LAG_TX_TYPE_ROUNDROBIN, | |
2187 | NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, | |
2188 | NETDEV_LAG_TX_TYPE_HASH, | |
2189 | }; | |
2190 | ||
2191 | struct netdev_lag_upper_info { | |
2192 | enum netdev_lag_tx_type tx_type; | |
2193 | }; | |
2194 | ||
fb1b2e3c JP |
2195 | struct netdev_lag_lower_state_info { |
2196 | u8 link_up : 1, | |
2197 | tx_enabled : 1; | |
2198 | }; | |
2199 | ||
1da177e4 LT |
2200 | #include <linux/notifier.h> |
2201 | ||
dcfe1421 AW |
2202 | /* netdevice notifier chain. Please remember to update the rtnetlink |
2203 | * notification exclusion list in rtnetlink_event() when adding new | |
2204 | * types. | |
2205 | */ | |
2206 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
2207 | #define NETDEV_DOWN 0x0002 | |
2208 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
2209 | detected a hardware crash and restarted | |
2210 | - we can use this eg to kick tcp sessions | |
2211 | once done */ | |
2212 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
2213 | #define NETDEV_REGISTER 0x0005 | |
2214 | #define NETDEV_UNREGISTER 0x0006 | |
1d486bfb | 2215 | #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */ |
dcfe1421 AW |
2216 | #define NETDEV_CHANGEADDR 0x0008 |
2217 | #define NETDEV_GOING_DOWN 0x0009 | |
2218 | #define NETDEV_CHANGENAME 0x000A | |
2219 | #define NETDEV_FEAT_CHANGE 0x000B | |
2220 | #define NETDEV_BONDING_FAILOVER 0x000C | |
2221 | #define NETDEV_PRE_UP 0x000D | |
2222 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
2223 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
2224 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 2225 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
2226 | #define NETDEV_RELEASE 0x0012 |
2227 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
2228 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 2229 | #define NETDEV_CHANGEUPPER 0x0015 |
4aa5dee4 | 2230 | #define NETDEV_RESEND_IGMP 0x0016 |
1d486bfb | 2231 | #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */ |
d4261e56 | 2232 | #define NETDEV_CHANGEINFODATA 0x0018 |
61bd3857 | 2233 | #define NETDEV_BONDING_INFO 0x0019 |
573c7ba0 | 2234 | #define NETDEV_PRECHANGEUPPER 0x001A |
04d48266 | 2235 | #define NETDEV_CHANGELOWERSTATE 0x001B |
b7aade15 | 2236 | #define NETDEV_OFFLOAD_PUSH_VXLAN 0x001C |
681e683f | 2237 | #define NETDEV_OFFLOAD_PUSH_GENEVE 0x001D |
dcfe1421 | 2238 | |
f629d208 JP |
2239 | int register_netdevice_notifier(struct notifier_block *nb); |
2240 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
2241 | |
2242 | struct netdev_notifier_info { | |
2243 | struct net_device *dev; | |
2244 | }; | |
2245 | ||
be9efd36 JP |
2246 | struct netdev_notifier_change_info { |
2247 | struct netdev_notifier_info info; /* must be first */ | |
2248 | unsigned int flags_changed; | |
2249 | }; | |
2250 | ||
0e4ead9d JP |
2251 | struct netdev_notifier_changeupper_info { |
2252 | struct netdev_notifier_info info; /* must be first */ | |
2253 | struct net_device *upper_dev; /* new upper dev */ | |
2254 | bool master; /* is upper dev master */ | |
5e82b4b2 | 2255 | bool linking; /* is the notification for link or unlink */ |
29bf24af | 2256 | void *upper_info; /* upper dev info */ |
0e4ead9d JP |
2257 | }; |
2258 | ||
04d48266 JP |
2259 | struct netdev_notifier_changelowerstate_info { |
2260 | struct netdev_notifier_info info; /* must be first */ | |
2261 | void *lower_state_info; /* is lower dev state */ | |
2262 | }; | |
2263 | ||
75538c2b CW |
2264 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2265 | struct net_device *dev) | |
2266 | { | |
2267 | info->dev = dev; | |
2268 | } | |
2269 | ||
351638e7 JP |
2270 | static inline struct net_device * |
2271 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
2272 | { | |
2273 | return info->dev; | |
2274 | } | |
2275 | ||
f629d208 | 2276 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
2277 | |
2278 | ||
1da177e4 LT |
2279 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2280 | ||
881d966b EB |
2281 | #define for_each_netdev(net, d) \ |
2282 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
2283 | #define for_each_netdev_reverse(net, d) \ |
2284 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
2285 | #define for_each_netdev_rcu(net, d) \ |
2286 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
2287 | #define for_each_netdev_safe(net, d, n) \ |
2288 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
2289 | #define for_each_netdev_continue(net, d) \ | |
2290 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 2291 | #define for_each_netdev_continue_rcu(net, d) \ |
2292 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 2293 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2294 | for_each_netdev_rcu(&init_net, slave) \ | |
4ccce02e | 2295 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
881d966b | 2296 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 2297 | |
a050c33f DL |
2298 | static inline struct net_device *next_net_device(struct net_device *dev) |
2299 | { | |
2300 | struct list_head *lh; | |
2301 | struct net *net; | |
2302 | ||
c346dca1 | 2303 | net = dev_net(dev); |
a050c33f DL |
2304 | lh = dev->dev_list.next; |
2305 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2306 | } | |
2307 | ||
ce81b76a ED |
2308 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2309 | { | |
2310 | struct list_head *lh; | |
2311 | struct net *net; | |
2312 | ||
2313 | net = dev_net(dev); | |
ccf43438 | 2314 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
2315 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2316 | } | |
2317 | ||
a050c33f DL |
2318 | static inline struct net_device *first_net_device(struct net *net) |
2319 | { | |
2320 | return list_empty(&net->dev_base_head) ? NULL : | |
2321 | net_device_entry(net->dev_base_head.next); | |
2322 | } | |
7562f876 | 2323 | |
ccf43438 ED |
2324 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2325 | { | |
2326 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
2327 | ||
2328 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2329 | } | |
2330 | ||
f629d208 JP |
2331 | int netdev_boot_setup_check(struct net_device *dev); |
2332 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
2333 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
2334 | const char *hwaddr); | |
2335 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2336 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2337 | void dev_add_pack(struct packet_type *pt); | |
2338 | void dev_remove_pack(struct packet_type *pt); | |
2339 | void __dev_remove_pack(struct packet_type *pt); | |
2340 | void dev_add_offload(struct packet_offload *po); | |
2341 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 | 2342 | |
a54acb3a | 2343 | int dev_get_iflink(const struct net_device *dev); |
fc4099f1 | 2344 | int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
6c555490 WC |
2345 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2346 | unsigned short mask); | |
f629d208 JP |
2347 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2348 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
2349 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
2350 | int dev_alloc_name(struct net_device *dev, const char *name); | |
2351 | int dev_open(struct net_device *dev); | |
2352 | int dev_close(struct net_device *dev); | |
99c4a26a | 2353 | int dev_close_many(struct list_head *head, bool unlink); |
f629d208 | 2354 | void dev_disable_lro(struct net_device *dev); |
0c4b51f0 | 2355 | int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
2b4aa3ce | 2356 | int dev_queue_xmit(struct sk_buff *skb); |
f663dd9a | 2357 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
2358 | int register_netdevice(struct net_device *dev); |
2359 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
2360 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
2361 | static inline void unregister_netdevice(struct net_device *dev) |
2362 | { | |
2363 | unregister_netdevice_queue(dev, NULL); | |
2364 | } | |
2365 | ||
f629d208 JP |
2366 | int netdev_refcnt_read(const struct net_device *dev); |
2367 | void free_netdev(struct net_device *dev); | |
74d332c1 | 2368 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
2369 | void synchronize_net(void); |
2370 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 2371 | |
f60e5990 | 2372 | DECLARE_PER_CPU(int, xmit_recursion); |
2373 | static inline int dev_recursion_level(void) | |
2374 | { | |
2375 | return this_cpu_read(xmit_recursion); | |
2376 | } | |
2377 | ||
f629d208 JP |
2378 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
2379 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
2380 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
2381 | int netdev_get_name(struct net *net, char *name, int ifindex); | |
2382 | int dev_restart(struct net_device *dev); | |
f629d208 | 2383 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
2384 | |
2385 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
2386 | { | |
2387 | return NAPI_GRO_CB(skb)->data_offset; | |
2388 | } | |
2389 | ||
2390 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
2391 | { | |
2392 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
2393 | } | |
2394 | ||
2395 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
2396 | { | |
2397 | NAPI_GRO_CB(skb)->data_offset += len; | |
2398 | } | |
2399 | ||
a5b1cf28 HX |
2400 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2401 | unsigned int offset) | |
86911732 | 2402 | { |
a5b1cf28 HX |
2403 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2404 | } | |
78a478d0 | 2405 | |
a5b1cf28 HX |
2406 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2407 | { | |
2408 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2409 | } | |
78a478d0 | 2410 | |
a5b1cf28 HX |
2411 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2412 | unsigned int offset) | |
2413 | { | |
17dd759c HX |
2414 | if (!pskb_may_pull(skb, hlen)) |
2415 | return NULL; | |
2416 | ||
a5b1cf28 HX |
2417 | NAPI_GRO_CB(skb)->frag0 = NULL; |
2418 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 2419 | return skb->data + offset; |
86911732 | 2420 | } |
1da177e4 | 2421 | |
36e7b1b8 HX |
2422 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2423 | { | |
78d3fd0b HX |
2424 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2425 | skb_network_offset(skb); | |
36e7b1b8 HX |
2426 | } |
2427 | ||
bf5a755f JC |
2428 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2429 | const void *start, unsigned int len) | |
2430 | { | |
573e8fca | 2431 | if (NAPI_GRO_CB(skb)->csum_valid) |
bf5a755f JC |
2432 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
2433 | csum_partial(start, len, 0)); | |
2434 | } | |
2435 | ||
573e8fca TH |
2436 | /* GRO checksum functions. These are logical equivalents of the normal |
2437 | * checksum functions (in skbuff.h) except that they operate on the GRO | |
2438 | * offsets and fields in sk_buff. | |
2439 | */ | |
2440 | ||
2441 | __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); | |
2442 | ||
15e2396d TH |
2443 | static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
2444 | { | |
b7fe10e5 | 2445 | return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb)); |
15e2396d TH |
2446 | } |
2447 | ||
573e8fca TH |
2448 | static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
2449 | bool zero_okay, | |
2450 | __sum16 check) | |
2451 | { | |
6edec0e6 TH |
2452 | return ((skb->ip_summed != CHECKSUM_PARTIAL || |
2453 | skb_checksum_start_offset(skb) < | |
2454 | skb_gro_offset(skb)) && | |
15e2396d | 2455 | !skb_at_gro_remcsum_start(skb) && |
662880f4 | 2456 | NAPI_GRO_CB(skb)->csum_cnt == 0 && |
573e8fca TH |
2457 | (!zero_okay || check)); |
2458 | } | |
2459 | ||
2460 | static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, | |
2461 | __wsum psum) | |
2462 | { | |
2463 | if (NAPI_GRO_CB(skb)->csum_valid && | |
2464 | !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) | |
2465 | return 0; | |
2466 | ||
2467 | NAPI_GRO_CB(skb)->csum = psum; | |
2468 | ||
2469 | return __skb_gro_checksum_complete(skb); | |
2470 | } | |
2471 | ||
573e8fca TH |
2472 | static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
2473 | { | |
662880f4 TH |
2474 | if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
2475 | /* Consume a checksum from CHECKSUM_UNNECESSARY */ | |
2476 | NAPI_GRO_CB(skb)->csum_cnt--; | |
2477 | } else { | |
2478 | /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we | |
2479 | * verified a new top level checksum or an encapsulated one | |
2480 | * during GRO. This saves work if we fallback to normal path. | |
2481 | */ | |
2482 | __skb_incr_checksum_unnecessary(skb); | |
573e8fca TH |
2483 | } |
2484 | } | |
2485 | ||
2486 | #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ | |
2487 | compute_pseudo) \ | |
2488 | ({ \ | |
2489 | __sum16 __ret = 0; \ | |
2490 | if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ | |
2491 | __ret = __skb_gro_checksum_validate_complete(skb, \ | |
2492 | compute_pseudo(skb, proto)); \ | |
5a212329 TH |
2493 | if (__ret) \ |
2494 | __skb_mark_checksum_bad(skb); \ | |
2495 | else \ | |
573e8fca TH |
2496 | skb_gro_incr_csum_unnecessary(skb); \ |
2497 | __ret; \ | |
2498 | }) | |
2499 | ||
2500 | #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ | |
2501 | __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) | |
2502 | ||
2503 | #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ | |
2504 | compute_pseudo) \ | |
2505 | __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) | |
2506 | ||
2507 | #define skb_gro_checksum_simple_validate(skb) \ | |
2508 | __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) | |
2509 | ||
d96535a1 TH |
2510 | static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
2511 | { | |
2512 | return (NAPI_GRO_CB(skb)->csum_cnt == 0 && | |
2513 | !NAPI_GRO_CB(skb)->csum_valid); | |
2514 | } | |
2515 | ||
2516 | static inline void __skb_gro_checksum_convert(struct sk_buff *skb, | |
2517 | __sum16 check, __wsum pseudo) | |
2518 | { | |
2519 | NAPI_GRO_CB(skb)->csum = ~pseudo; | |
2520 | NAPI_GRO_CB(skb)->csum_valid = 1; | |
2521 | } | |
2522 | ||
2523 | #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \ | |
2524 | do { \ | |
2525 | if (__skb_gro_checksum_convert_check(skb)) \ | |
2526 | __skb_gro_checksum_convert(skb, check, \ | |
2527 | compute_pseudo(skb, proto)); \ | |
2528 | } while (0) | |
2529 | ||
26c4f7da TH |
2530 | struct gro_remcsum { |
2531 | int offset; | |
2532 | __wsum delta; | |
2533 | }; | |
2534 | ||
2535 | static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) | |
2536 | { | |
846cd667 | 2537 | grc->offset = 0; |
26c4f7da TH |
2538 | grc->delta = 0; |
2539 | } | |
2540 | ||
b7fe10e5 TH |
2541 | static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, |
2542 | unsigned int off, size_t hdrlen, | |
2543 | int start, int offset, | |
2544 | struct gro_remcsum *grc, | |
2545 | bool nopartial) | |
dcdc8994 TH |
2546 | { |
2547 | __wsum delta; | |
b7fe10e5 | 2548 | size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start); |
dcdc8994 TH |
2549 | |
2550 | BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); | |
2551 | ||
15e2396d | 2552 | if (!nopartial) { |
b7fe10e5 TH |
2553 | NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start; |
2554 | return ptr; | |
2555 | } | |
2556 | ||
2557 | ptr = skb_gro_header_fast(skb, off); | |
2558 | if (skb_gro_header_hard(skb, off + plen)) { | |
2559 | ptr = skb_gro_header_slow(skb, off + plen, off); | |
2560 | if (!ptr) | |
2561 | return NULL; | |
15e2396d TH |
2562 | } |
2563 | ||
b7fe10e5 TH |
2564 | delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, |
2565 | start, offset); | |
dcdc8994 TH |
2566 | |
2567 | /* Adjust skb->csum since we changed the packet */ | |
dcdc8994 | 2568 | NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
26c4f7da | 2569 | |
b7fe10e5 | 2570 | grc->offset = off + hdrlen + offset; |
26c4f7da | 2571 | grc->delta = delta; |
b7fe10e5 TH |
2572 | |
2573 | return ptr; | |
dcdc8994 TH |
2574 | } |
2575 | ||
26c4f7da TH |
2576 | static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
2577 | struct gro_remcsum *grc) | |
2578 | { | |
b7fe10e5 TH |
2579 | void *ptr; |
2580 | size_t plen = grc->offset + sizeof(u16); | |
2581 | ||
26c4f7da TH |
2582 | if (!grc->delta) |
2583 | return; | |
2584 | ||
b7fe10e5 TH |
2585 | ptr = skb_gro_header_fast(skb, grc->offset); |
2586 | if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { | |
2587 | ptr = skb_gro_header_slow(skb, plen, grc->offset); | |
2588 | if (!ptr) | |
2589 | return; | |
2590 | } | |
2591 | ||
2592 | remcsum_unadjust((__sum16 *)ptr, grc->delta); | |
26c4f7da | 2593 | } |
dcdc8994 | 2594 | |
6ae23ad3 TH |
2595 | struct skb_csum_offl_spec { |
2596 | __u16 ipv4_okay:1, | |
2597 | ipv6_okay:1, | |
2598 | encap_okay:1, | |
2599 | ip_options_okay:1, | |
2600 | ext_hdrs_okay:1, | |
2601 | tcp_okay:1, | |
2602 | udp_okay:1, | |
2603 | sctp_okay:1, | |
2604 | vlan_okay:1, | |
2605 | no_encapped_ipv6:1, | |
2606 | no_not_encapped:1; | |
2607 | }; | |
2608 | ||
2609 | bool __skb_csum_offload_chk(struct sk_buff *skb, | |
2610 | const struct skb_csum_offl_spec *spec, | |
2611 | bool *csum_encapped, | |
2612 | bool csum_help); | |
2613 | ||
2614 | static inline bool skb_csum_offload_chk(struct sk_buff *skb, | |
2615 | const struct skb_csum_offl_spec *spec, | |
2616 | bool *csum_encapped, | |
2617 | bool csum_help) | |
2618 | { | |
2619 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
2620 | return false; | |
2621 | ||
2622 | return __skb_csum_offload_chk(skb, spec, csum_encapped, csum_help); | |
2623 | } | |
2624 | ||
2625 | static inline bool skb_csum_offload_chk_help(struct sk_buff *skb, | |
2626 | const struct skb_csum_offl_spec *spec) | |
2627 | { | |
2628 | bool csum_encapped; | |
2629 | ||
2630 | return skb_csum_offload_chk(skb, spec, &csum_encapped, true); | |
2631 | } | |
2632 | ||
2633 | static inline bool skb_csum_off_chk_help_cmn(struct sk_buff *skb) | |
2634 | { | |
2635 | static const struct skb_csum_offl_spec csum_offl_spec = { | |
2636 | .ipv4_okay = 1, | |
2637 | .ip_options_okay = 1, | |
2638 | .ipv6_okay = 1, | |
2639 | .vlan_okay = 1, | |
2640 | .tcp_okay = 1, | |
2641 | .udp_okay = 1, | |
2642 | }; | |
2643 | ||
2644 | return skb_csum_offload_chk_help(skb, &csum_offl_spec); | |
2645 | } | |
2646 | ||
2647 | static inline bool skb_csum_off_chk_help_cmn_v4_only(struct sk_buff *skb) | |
2648 | { | |
2649 | static const struct skb_csum_offl_spec csum_offl_spec = { | |
2650 | .ipv4_okay = 1, | |
2651 | .ip_options_okay = 1, | |
2652 | .tcp_okay = 1, | |
2653 | .udp_okay = 1, | |
2654 | .vlan_okay = 1, | |
2655 | }; | |
2656 | ||
2657 | return skb_csum_offload_chk_help(skb, &csum_offl_spec); | |
2658 | } | |
2659 | ||
0c4e8581 SH |
2660 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2661 | unsigned short type, | |
3b04ddde | 2662 | const void *daddr, const void *saddr, |
95c96174 | 2663 | unsigned int len) |
0c4e8581 | 2664 | { |
f1ecfd5d | 2665 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2666 | return 0; |
3b04ddde SH |
2667 | |
2668 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2669 | } |
2670 | ||
b95cce35 SH |
2671 | static inline int dev_parse_header(const struct sk_buff *skb, |
2672 | unsigned char *haddr) | |
2673 | { | |
2674 | const struct net_device *dev = skb->dev; | |
2675 | ||
1b83336b | 2676 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2677 | return 0; |
3b04ddde | 2678 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2679 | } |
2680 | ||
2793a23a WB |
2681 | /* ll_header must have at least hard_header_len allocated */ |
2682 | static inline bool dev_validate_header(const struct net_device *dev, | |
2683 | char *ll_header, int len) | |
2684 | { | |
2685 | if (likely(len >= dev->hard_header_len)) | |
2686 | return true; | |
2687 | ||
2688 | if (capable(CAP_SYS_RAWIO)) { | |
2689 | memset(ll_header + len, 0, dev->hard_header_len - len); | |
2690 | return true; | |
2691 | } | |
2692 | ||
2693 | if (dev->header_ops && dev->header_ops->validate) | |
2694 | return dev->header_ops->validate(ll_header, len); | |
2695 | ||
2696 | return false; | |
2697 | } | |
2698 | ||
1da177e4 | 2699 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
f629d208 | 2700 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2701 | static inline int unregister_gifconf(unsigned int family) |
2702 | { | |
2703 | return register_gifconf(family, NULL); | |
2704 | } | |
2705 | ||
99bbc707 | 2706 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2707 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2708 | struct sd_flow_limit { |
2709 | u64 count; | |
2710 | unsigned int num_buckets; | |
2711 | unsigned int history_head; | |
2712 | u16 history[FLOW_LIMIT_HISTORY]; | |
2713 | u8 buckets[]; | |
2714 | }; | |
2715 | ||
2716 | extern int netdev_flow_limit_table_len; | |
2717 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2718 | ||
1da177e4 | 2719 | /* |
5e82b4b2 | 2720 | * Incoming packets are placed on per-CPU queues |
1da177e4 | 2721 | */ |
d94d9fee | 2722 | struct softnet_data { |
1da177e4 | 2723 | struct list_head poll_list; |
6e7676c1 | 2724 | struct sk_buff_head process_queue; |
1da177e4 | 2725 | |
dee42870 | 2726 | /* stats */ |
cd7b5396 DM |
2727 | unsigned int processed; |
2728 | unsigned int time_squeeze; | |
cd7b5396 | 2729 | unsigned int received_rps; |
fd793d89 | 2730 | #ifdef CONFIG_RPS |
88751275 | 2731 | struct softnet_data *rps_ipi_list; |
4cdb1e2e ED |
2732 | #endif |
2733 | #ifdef CONFIG_NET_FLOW_LIMIT | |
2734 | struct sd_flow_limit __rcu *flow_limit; | |
2735 | #endif | |
2736 | struct Qdisc *output_queue; | |
2737 | struct Qdisc **output_queue_tailp; | |
2738 | struct sk_buff *completion_queue; | |
88751275 | 2739 | |
4cdb1e2e | 2740 | #ifdef CONFIG_RPS |
501e7ef5 ED |
2741 | /* input_queue_head should be written by cpu owning this struct, |
2742 | * and only read by other cpus. Worth using a cache line. | |
2743 | */ | |
2744 | unsigned int input_queue_head ____cacheline_aligned_in_smp; | |
2745 | ||
2746 | /* Elements below can be accessed between CPUs for RPS/RFS */ | |
0a9627f2 | 2747 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
2748 | struct softnet_data *rps_ipi_next; |
2749 | unsigned int cpu; | |
76cc8b13 | 2750 | unsigned int input_queue_tail; |
1e94d72f | 2751 | #endif |
95c96174 | 2752 | unsigned int dropped; |
0a9627f2 | 2753 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2754 | struct napi_struct backlog; |
99bbc707 | 2755 | |
1da177e4 LT |
2756 | }; |
2757 | ||
76cc8b13 | 2758 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2759 | { |
2760 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2761 | sd->input_queue_head++; |
2762 | #endif | |
2763 | } | |
2764 | ||
2765 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2766 | unsigned int *qtail) | |
2767 | { | |
2768 | #ifdef CONFIG_RPS | |
2769 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2770 | #endif |
2771 | } | |
2772 | ||
0a9627f2 | 2773 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2774 | |
f629d208 | 2775 | void __netif_schedule(struct Qdisc *q); |
46e5da40 | 2776 | void netif_schedule_queue(struct netdev_queue *txq); |
86d804e1 | 2777 | |
fd2ea0a7 DM |
2778 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2779 | { | |
2780 | unsigned int i; | |
2781 | ||
2782 | for (i = 0; i < dev->num_tx_queues; i++) | |
2783 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2784 | } | |
2785 | ||
f9a7cbbf | 2786 | static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
d29f749e | 2787 | { |
73466498 | 2788 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2789 | } |
2790 | ||
bea3348e SH |
2791 | /** |
2792 | * netif_start_queue - allow transmit | |
2793 | * @dev: network device | |
2794 | * | |
2795 | * Allow upper layers to call the device hard_start_xmit routine. | |
2796 | */ | |
1da177e4 LT |
2797 | static inline void netif_start_queue(struct net_device *dev) |
2798 | { | |
e8a0464c | 2799 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2800 | } |
2801 | ||
fd2ea0a7 DM |
2802 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2803 | { | |
2804 | unsigned int i; | |
2805 | ||
2806 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2807 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2808 | netif_tx_start_queue(txq); | |
2809 | } | |
2810 | } | |
2811 | ||
46e5da40 | 2812 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
79d16385 | 2813 | |
d29f749e DJ |
2814 | /** |
2815 | * netif_wake_queue - restart transmit | |
2816 | * @dev: network device | |
2817 | * | |
2818 | * Allow upper layers to call the device hard_start_xmit routine. | |
2819 | * Used for flow control when transmit resources are available. | |
2820 | */ | |
79d16385 DM |
2821 | static inline void netif_wake_queue(struct net_device *dev) |
2822 | { | |
e8a0464c | 2823 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2824 | } |
2825 | ||
fd2ea0a7 DM |
2826 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2827 | { | |
2828 | unsigned int i; | |
2829 | ||
2830 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2831 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2832 | netif_tx_wake_queue(txq); | |
2833 | } | |
2834 | } | |
2835 | ||
f9a7cbbf | 2836 | static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
d29f749e | 2837 | { |
73466498 | 2838 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2839 | } |
2840 | ||
bea3348e SH |
2841 | /** |
2842 | * netif_stop_queue - stop transmitted packets | |
2843 | * @dev: network device | |
2844 | * | |
2845 | * Stop upper layers calling the device hard_start_xmit routine. | |
2846 | * Used for flow control when transmit resources are unavailable. | |
2847 | */ | |
1da177e4 LT |
2848 | static inline void netif_stop_queue(struct net_device *dev) |
2849 | { | |
e8a0464c | 2850 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2851 | } |
2852 | ||
a2029240 | 2853 | void netif_tx_stop_all_queues(struct net_device *dev); |
fd2ea0a7 | 2854 | |
4d29515f | 2855 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2856 | { |
73466498 | 2857 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2858 | } |
2859 | ||
bea3348e SH |
2860 | /** |
2861 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2862 | * @dev: network device | |
2863 | * | |
2864 | * Test if transmit queue on device is currently unable to send. | |
2865 | */ | |
4d29515f | 2866 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2867 | { |
e8a0464c | 2868 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2869 | } |
2870 | ||
4d29515f | 2871 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2872 | { |
73466498 TH |
2873 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2874 | } | |
2875 | ||
8e2f1a63 DB |
2876 | static inline bool |
2877 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
2878 | { |
2879 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2880 | } | |
2881 | ||
8e2f1a63 DB |
2882 | static inline bool |
2883 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
2884 | { | |
2885 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
2886 | } | |
2887 | ||
53511453 ED |
2888 | /** |
2889 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write | |
2890 | * @dev_queue: pointer to transmit queue | |
2891 | * | |
2892 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), | |
5e82b4b2 | 2893 | * to give appropriate hint to the CPU. |
53511453 ED |
2894 | */ |
2895 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) | |
2896 | { | |
2897 | #ifdef CONFIG_BQL | |
2898 | prefetchw(&dev_queue->dql.num_queued); | |
2899 | #endif | |
2900 | } | |
2901 | ||
2902 | /** | |
2903 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write | |
2904 | * @dev_queue: pointer to transmit queue | |
2905 | * | |
2906 | * BQL enabled drivers might use this helper in their TX completion path, | |
5e82b4b2 | 2907 | * to give appropriate hint to the CPU. |
53511453 ED |
2908 | */ |
2909 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) | |
2910 | { | |
2911 | #ifdef CONFIG_BQL | |
2912 | prefetchw(&dev_queue->dql.limit); | |
2913 | #endif | |
2914 | } | |
2915 | ||
c5d67bd7 TH |
2916 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2917 | unsigned int bytes) | |
2918 | { | |
114cf580 TH |
2919 | #ifdef CONFIG_BQL |
2920 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2921 | |
2922 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2923 | return; | |
2924 | ||
2925 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2926 | ||
2927 | /* | |
2928 | * The XOFF flag must be set before checking the dql_avail below, | |
2929 | * because in netdev_tx_completed_queue we update the dql_completed | |
2930 | * before checking the XOFF flag. | |
2931 | */ | |
2932 | smp_mb(); | |
2933 | ||
2934 | /* check again in case another CPU has just made room avail */ | |
2935 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2936 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2937 | #endif |
c5d67bd7 TH |
2938 | } |
2939 | ||
0042d0c8 FF |
2940 | /** |
2941 | * netdev_sent_queue - report the number of bytes queued to hardware | |
2942 | * @dev: network device | |
2943 | * @bytes: number of bytes queued to the hardware device queue | |
2944 | * | |
2945 | * Report the number of bytes queued for sending/completion to the network | |
2946 | * device hardware queue. @bytes should be a good approximation and should | |
2947 | * exactly match netdev_completed_queue() @bytes | |
2948 | */ | |
c5d67bd7 TH |
2949 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2950 | { | |
2951 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2952 | } | |
2953 | ||
2954 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2955 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2956 | { |
114cf580 | 2957 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2958 | if (unlikely(!bytes)) |
2959 | return; | |
2960 | ||
2961 | dql_completed(&dev_queue->dql, bytes); | |
2962 | ||
2963 | /* | |
2964 | * Without the memory barrier there is a small possiblity that | |
2965 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2966 | * be stopped forever | |
2967 | */ | |
2968 | smp_mb(); | |
2969 | ||
2970 | if (dql_avail(&dev_queue->dql) < 0) | |
2971 | return; | |
2972 | ||
2973 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2974 | netif_schedule_queue(dev_queue); | |
114cf580 | 2975 | #endif |
c5d67bd7 TH |
2976 | } |
2977 | ||
0042d0c8 FF |
2978 | /** |
2979 | * netdev_completed_queue - report bytes and packets completed by device | |
2980 | * @dev: network device | |
2981 | * @pkts: actual number of packets sent over the medium | |
2982 | * @bytes: actual number of bytes sent over the medium | |
2983 | * | |
2984 | * Report the number of bytes and packets transmitted by the network device | |
2985 | * hardware queue over the physical medium, @bytes must exactly match the | |
2986 | * @bytes amount passed to netdev_sent_queue() | |
2987 | */ | |
c5d67bd7 | 2988 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 2989 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2990 | { |
2991 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2992 | } | |
2993 | ||
2994 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
2995 | { | |
114cf580 | 2996 | #ifdef CONFIG_BQL |
5c490354 | 2997 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
2998 | dql_reset(&q->dql); |
2999 | #endif | |
c5d67bd7 TH |
3000 | } |
3001 | ||
0042d0c8 FF |
3002 | /** |
3003 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
3004 | * @dev_queue: network device | |
3005 | * | |
3006 | * Reset the bytes and packet count of a network device and clear the | |
3007 | * software flow control OFF bit for this network device | |
3008 | */ | |
c5d67bd7 TH |
3009 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
3010 | { | |
3011 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
3012 | } |
3013 | ||
b9507bda DB |
3014 | /** |
3015 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
3016 | * @dev: network device | |
3017 | * @queue_index: given tx queue index | |
3018 | * | |
3019 | * Returns 0 if given tx queue index >= number of device tx queues, | |
3020 | * otherwise returns the originally passed tx queue index. | |
3021 | */ | |
3022 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
3023 | { | |
3024 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
3025 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
3026 | dev->name, queue_index, | |
3027 | dev->real_num_tx_queues); | |
3028 | return 0; | |
3029 | } | |
3030 | ||
3031 | return queue_index; | |
3032 | } | |
3033 | ||
bea3348e SH |
3034 | /** |
3035 | * netif_running - test if up | |
3036 | * @dev: network device | |
3037 | * | |
3038 | * Test if the device has been brought up. | |
3039 | */ | |
4d29515f | 3040 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
3041 | { |
3042 | return test_bit(__LINK_STATE_START, &dev->state); | |
3043 | } | |
3044 | ||
f25f4e44 | 3045 | /* |
5e82b4b2 | 3046 | * Routines to manage the subqueues on a device. We only need start, |
f25f4e44 PWJ |
3047 | * stop, and a check if it's stopped. All other device management is |
3048 | * done at the overall netdevice level. | |
3049 | * Also test the device if we're multiqueue. | |
3050 | */ | |
bea3348e SH |
3051 | |
3052 | /** | |
3053 | * netif_start_subqueue - allow sending packets on subqueue | |
3054 | * @dev: network device | |
3055 | * @queue_index: sub queue index | |
3056 | * | |
3057 | * Start individual transmit queue of a device with multiple transmit queues. | |
3058 | */ | |
f25f4e44 PWJ |
3059 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
3060 | { | |
fd2ea0a7 | 3061 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3062 | |
3063 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
3064 | } |
3065 | ||
bea3348e SH |
3066 | /** |
3067 | * netif_stop_subqueue - stop sending packets on subqueue | |
3068 | * @dev: network device | |
3069 | * @queue_index: sub queue index | |
3070 | * | |
3071 | * Stop individual transmit queue of a device with multiple transmit queues. | |
3072 | */ | |
f25f4e44 PWJ |
3073 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
3074 | { | |
fd2ea0a7 | 3075 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 3076 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
3077 | } |
3078 | ||
bea3348e SH |
3079 | /** |
3080 | * netif_subqueue_stopped - test status of subqueue | |
3081 | * @dev: network device | |
3082 | * @queue_index: sub queue index | |
3083 | * | |
3084 | * Check individual transmit queue of a device with multiple transmit queues. | |
3085 | */ | |
4d29515f DM |
3086 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
3087 | u16 queue_index) | |
f25f4e44 | 3088 | { |
fd2ea0a7 | 3089 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3090 | |
3091 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
3092 | } |
3093 | ||
4d29515f DM |
3094 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
3095 | struct sk_buff *skb) | |
668f895a PE |
3096 | { |
3097 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
3098 | } | |
bea3348e | 3099 | |
46e5da40 | 3100 | void netif_wake_subqueue(struct net_device *dev, u16 queue_index); |
f25f4e44 | 3101 | |
537c00de | 3102 | #ifdef CONFIG_XPS |
53af53ae | 3103 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 3104 | u16 index); |
537c00de AD |
3105 | #else |
3106 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 3107 | const struct cpumask *mask, |
537c00de AD |
3108 | u16 index) |
3109 | { | |
3110 | return 0; | |
3111 | } | |
3112 | #endif | |
3113 | ||
5605c762 JP |
3114 | u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb, |
3115 | unsigned int num_tx_queues); | |
3116 | ||
a3d22a68 VZ |
3117 | /* |
3118 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
3119 | * as a distribution range limit for the returned value. | |
3120 | */ | |
3121 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
0e001614 | 3122 | struct sk_buff *skb) |
a3d22a68 VZ |
3123 | { |
3124 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
3125 | } | |
3126 | ||
bea3348e SH |
3127 | /** |
3128 | * netif_is_multiqueue - test if device has multiple transmit queues | |
3129 | * @dev: network device | |
3130 | * | |
3131 | * Check if device has multiple transmit queues | |
bea3348e | 3132 | */ |
4d29515f | 3133 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 3134 | { |
a02cec21 | 3135 | return dev->num_tx_queues > 1; |
f25f4e44 | 3136 | } |
1da177e4 | 3137 | |
f629d208 | 3138 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 3139 | |
a953be53 | 3140 | #ifdef CONFIG_SYSFS |
f629d208 | 3141 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
3142 | #else |
3143 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
3144 | unsigned int rxq) | |
3145 | { | |
3146 | return 0; | |
3147 | } | |
3148 | #endif | |
3149 | ||
a953be53 MD |
3150 | #ifdef CONFIG_SYSFS |
3151 | static inline unsigned int get_netdev_rx_queue_index( | |
3152 | struct netdev_rx_queue *queue) | |
3153 | { | |
3154 | struct net_device *dev = queue->dev; | |
3155 | int index = queue - dev->_rx; | |
3156 | ||
3157 | BUG_ON(index >= dev->num_rx_queues); | |
3158 | return index; | |
3159 | } | |
3160 | #endif | |
3161 | ||
16917b87 | 3162 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 3163 | int netif_get_num_default_rss_queues(void); |
16917b87 | 3164 | |
e6247027 ED |
3165 | enum skb_free_reason { |
3166 | SKB_REASON_CONSUMED, | |
3167 | SKB_REASON_DROPPED, | |
3168 | }; | |
3169 | ||
3170 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
3171 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 3172 | |
e6247027 ED |
3173 | /* |
3174 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
3175 | * interrupt context or with hardware interrupts being disabled. | |
3176 | * (in_irq() || irqs_disabled()) | |
3177 | * | |
3178 | * We provide four helpers that can be used in following contexts : | |
3179 | * | |
3180 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
3181 | * replacing kfree_skb(skb) | |
3182 | * | |
3183 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
3184 | * Typically used in place of consume_skb(skb) in TX completion path | |
3185 | * | |
3186 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
3187 | * replacing kfree_skb(skb) | |
3188 | * | |
3189 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
3190 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 3191 | */ |
e6247027 ED |
3192 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
3193 | { | |
3194 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
3195 | } | |
3196 | ||
3197 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
3198 | { | |
3199 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
3200 | } | |
3201 | ||
3202 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
3203 | { | |
3204 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
3205 | } | |
3206 | ||
3207 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
3208 | { | |
3209 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
3210 | } | |
1da177e4 | 3211 | |
f629d208 JP |
3212 | int netif_rx(struct sk_buff *skb); |
3213 | int netif_rx_ni(struct sk_buff *skb); | |
04eb4489 | 3214 | int netif_receive_skb(struct sk_buff *skb); |
f629d208 JP |
3215 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
3216 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
3217 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
3218 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
3219 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
3220 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
3221 | |
3222 | static inline void napi_free_frags(struct napi_struct *napi) | |
3223 | { | |
3224 | kfree_skb(napi->skb); | |
3225 | napi->skb = NULL; | |
3226 | } | |
3227 | ||
f629d208 JP |
3228 | int netdev_rx_handler_register(struct net_device *dev, |
3229 | rx_handler_func_t *rx_handler, | |
3230 | void *rx_handler_data); | |
3231 | void netdev_rx_handler_unregister(struct net_device *dev); | |
3232 | ||
3233 | bool dev_valid_name(const char *name); | |
3234 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
3235 | int dev_ethtool(struct net *net, struct ifreq *); | |
3236 | unsigned int dev_get_flags(const struct net_device *); | |
3237 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
3238 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
3239 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
3240 | unsigned int gchanges); | |
f629d208 JP |
3241 | int dev_change_name(struct net_device *, const char *); |
3242 | int dev_set_alias(struct net_device *, const char *, size_t); | |
3243 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); | |
3244 | int dev_set_mtu(struct net_device *, int); | |
3245 | void dev_set_group(struct net_device *, int); | |
3246 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
3247 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
3248 | int dev_get_phys_port_id(struct net_device *dev, | |
02637fce | 3249 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
3250 | int dev_get_phys_port_name(struct net_device *dev, |
3251 | char *name, size_t len); | |
d746d707 | 3252 | int dev_change_proto_down(struct net_device *dev, bool proto_down); |
55a93b3e | 3253 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev); |
ce93718f DM |
3254 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
3255 | struct netdev_queue *txq, int *ret); | |
a0265d28 | 3256 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 3257 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f4b05d27 NA |
3258 | bool is_skb_forwardable(const struct net_device *dev, |
3259 | const struct sk_buff *skb); | |
1da177e4 | 3260 | |
74b20582 DA |
3261 | void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
3262 | ||
20380731 | 3263 | extern int netdev_budget; |
1da177e4 LT |
3264 | |
3265 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 3266 | void netdev_run_todo(void); |
1da177e4 | 3267 | |
bea3348e SH |
3268 | /** |
3269 | * dev_put - release reference to device | |
3270 | * @dev: network device | |
3271 | * | |
9ef4429b | 3272 | * Release reference to device to allow it to be freed. |
bea3348e | 3273 | */ |
1da177e4 LT |
3274 | static inline void dev_put(struct net_device *dev) |
3275 | { | |
933393f5 | 3276 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
3277 | } |
3278 | ||
bea3348e SH |
3279 | /** |
3280 | * dev_hold - get reference to device | |
3281 | * @dev: network device | |
3282 | * | |
9ef4429b | 3283 | * Hold reference to device to keep it from being freed. |
bea3348e | 3284 | */ |
15333061 SH |
3285 | static inline void dev_hold(struct net_device *dev) |
3286 | { | |
933393f5 | 3287 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 3288 | } |
1da177e4 LT |
3289 | |
3290 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
3291 | * and _off may be called from IRQ context, but it is caller | |
3292 | * who is responsible for serialization of these calls. | |
b00055aa SR |
3293 | * |
3294 | * The name carrier is inappropriate, these functions should really be | |
3295 | * called netif_lowerlayer_*() because they represent the state of any | |
3296 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
3297 | */ |
3298 | ||
f629d208 JP |
3299 | void linkwatch_init_dev(struct net_device *dev); |
3300 | void linkwatch_fire_event(struct net_device *dev); | |
3301 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 3302 | |
bea3348e SH |
3303 | /** |
3304 | * netif_carrier_ok - test if carrier present | |
3305 | * @dev: network device | |
3306 | * | |
3307 | * Check if carrier is present on device | |
3308 | */ | |
4d29515f | 3309 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
3310 | { |
3311 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
3312 | } | |
3313 | ||
f629d208 | 3314 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 3315 | |
f629d208 | 3316 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 3317 | |
f629d208 | 3318 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 3319 | |
f629d208 | 3320 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 3321 | |
bea3348e SH |
3322 | /** |
3323 | * netif_dormant_on - mark device as dormant. | |
3324 | * @dev: network device | |
3325 | * | |
3326 | * Mark device as dormant (as per RFC2863). | |
3327 | * | |
3328 | * The dormant state indicates that the relevant interface is not | |
3329 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
3330 | * in a "pending" state, waiting for some external event. For "on- | |
3331 | * demand" interfaces, this new state identifies the situation where the | |
3332 | * interface is waiting for events to place it in the up state. | |
bea3348e | 3333 | */ |
b00055aa SR |
3334 | static inline void netif_dormant_on(struct net_device *dev) |
3335 | { | |
3336 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3337 | linkwatch_fire_event(dev); | |
3338 | } | |
3339 | ||
bea3348e SH |
3340 | /** |
3341 | * netif_dormant_off - set device as not dormant. | |
3342 | * @dev: network device | |
3343 | * | |
3344 | * Device is not in dormant state. | |
3345 | */ | |
b00055aa SR |
3346 | static inline void netif_dormant_off(struct net_device *dev) |
3347 | { | |
3348 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3349 | linkwatch_fire_event(dev); | |
3350 | } | |
3351 | ||
bea3348e SH |
3352 | /** |
3353 | * netif_dormant - test if carrier present | |
3354 | * @dev: network device | |
3355 | * | |
3356 | * Check if carrier is present on device | |
3357 | */ | |
4d29515f | 3358 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
3359 | { |
3360 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
3361 | } | |
3362 | ||
3363 | ||
bea3348e SH |
3364 | /** |
3365 | * netif_oper_up - test if device is operational | |
3366 | * @dev: network device | |
3367 | * | |
3368 | * Check if carrier is operational | |
3369 | */ | |
4d29515f | 3370 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 3371 | { |
b00055aa SR |
3372 | return (dev->operstate == IF_OPER_UP || |
3373 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
3374 | } | |
3375 | ||
bea3348e SH |
3376 | /** |
3377 | * netif_device_present - is device available or removed | |
3378 | * @dev: network device | |
3379 | * | |
3380 | * Check if device has not been removed from system. | |
3381 | */ | |
4d29515f | 3382 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
3383 | { |
3384 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
3385 | } | |
3386 | ||
f629d208 | 3387 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 3388 | |
f629d208 | 3389 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
3390 | |
3391 | /* | |
3392 | * Network interface message level settings | |
3393 | */ | |
1da177e4 LT |
3394 | |
3395 | enum { | |
3396 | NETIF_MSG_DRV = 0x0001, | |
3397 | NETIF_MSG_PROBE = 0x0002, | |
3398 | NETIF_MSG_LINK = 0x0004, | |
3399 | NETIF_MSG_TIMER = 0x0008, | |
3400 | NETIF_MSG_IFDOWN = 0x0010, | |
3401 | NETIF_MSG_IFUP = 0x0020, | |
3402 | NETIF_MSG_RX_ERR = 0x0040, | |
3403 | NETIF_MSG_TX_ERR = 0x0080, | |
3404 | NETIF_MSG_TX_QUEUED = 0x0100, | |
3405 | NETIF_MSG_INTR = 0x0200, | |
3406 | NETIF_MSG_TX_DONE = 0x0400, | |
3407 | NETIF_MSG_RX_STATUS = 0x0800, | |
3408 | NETIF_MSG_PKTDATA = 0x1000, | |
3409 | NETIF_MSG_HW = 0x2000, | |
3410 | NETIF_MSG_WOL = 0x4000, | |
3411 | }; | |
3412 | ||
3413 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
3414 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
3415 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
3416 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
3417 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
3418 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
3419 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
3420 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
3421 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
3422 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
3423 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
3424 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
3425 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
3426 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
3427 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
3428 | ||
3429 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
3430 | { | |
3431 | /* use default */ | |
3432 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
3433 | return default_msg_enable_bits; | |
3434 | if (debug_value == 0) /* no output */ | |
3435 | return 0; | |
3436 | /* set low N bits */ | |
3437 | return (1 << debug_value) - 1; | |
3438 | } | |
3439 | ||
c773e847 | 3440 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 3441 | { |
c773e847 DM |
3442 | spin_lock(&txq->_xmit_lock); |
3443 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
3444 | } |
3445 | ||
fd2ea0a7 DM |
3446 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
3447 | { | |
3448 | spin_lock_bh(&txq->_xmit_lock); | |
3449 | txq->xmit_lock_owner = smp_processor_id(); | |
3450 | } | |
3451 | ||
4d29515f | 3452 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 3453 | { |
4d29515f | 3454 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
3455 | if (likely(ok)) |
3456 | txq->xmit_lock_owner = smp_processor_id(); | |
3457 | return ok; | |
3458 | } | |
3459 | ||
3460 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
3461 | { | |
3462 | txq->xmit_lock_owner = -1; | |
3463 | spin_unlock(&txq->_xmit_lock); | |
3464 | } | |
3465 | ||
3466 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
3467 | { | |
3468 | txq->xmit_lock_owner = -1; | |
3469 | spin_unlock_bh(&txq->_xmit_lock); | |
3470 | } | |
3471 | ||
08baf561 ED |
3472 | static inline void txq_trans_update(struct netdev_queue *txq) |
3473 | { | |
3474 | if (txq->xmit_lock_owner != -1) | |
3475 | txq->trans_start = jiffies; | |
3476 | } | |
3477 | ||
ba162f8e FW |
3478 | /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ |
3479 | static inline void netif_trans_update(struct net_device *dev) | |
3480 | { | |
9b36627a FW |
3481 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
3482 | ||
3483 | if (txq->trans_start != jiffies) | |
3484 | txq->trans_start = jiffies; | |
ba162f8e FW |
3485 | } |
3486 | ||
d29f749e DJ |
3487 | /** |
3488 | * netif_tx_lock - grab network device transmit lock | |
3489 | * @dev: network device | |
d29f749e DJ |
3490 | * |
3491 | * Get network device transmit lock | |
3492 | */ | |
22dd7495 JHS |
3493 | static inline void netif_tx_lock(struct net_device *dev) |
3494 | { | |
e8a0464c | 3495 | unsigned int i; |
c3f26a26 | 3496 | int cpu; |
c773e847 | 3497 | |
c3f26a26 DM |
3498 | spin_lock(&dev->tx_global_lock); |
3499 | cpu = smp_processor_id(); | |
e8a0464c DM |
3500 | for (i = 0; i < dev->num_tx_queues; i++) { |
3501 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3502 | |
3503 | /* We are the only thread of execution doing a | |
3504 | * freeze, but we have to grab the _xmit_lock in | |
3505 | * order to synchronize with threads which are in | |
3506 | * the ->hard_start_xmit() handler and already | |
3507 | * checked the frozen bit. | |
3508 | */ | |
e8a0464c | 3509 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
3510 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
3511 | __netif_tx_unlock(txq); | |
e8a0464c | 3512 | } |
932ff279 HX |
3513 | } |
3514 | ||
3515 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
3516 | { | |
e8a0464c DM |
3517 | local_bh_disable(); |
3518 | netif_tx_lock(dev); | |
932ff279 HX |
3519 | } |
3520 | ||
932ff279 HX |
3521 | static inline void netif_tx_unlock(struct net_device *dev) |
3522 | { | |
e8a0464c DM |
3523 | unsigned int i; |
3524 | ||
3525 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3526 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 3527 | |
c3f26a26 DM |
3528 | /* No need to grab the _xmit_lock here. If the |
3529 | * queue is not stopped for another reason, we | |
3530 | * force a schedule. | |
3531 | */ | |
3532 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 3533 | netif_schedule_queue(txq); |
c3f26a26 DM |
3534 | } |
3535 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
3536 | } |
3537 | ||
3538 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
3539 | { | |
e8a0464c DM |
3540 | netif_tx_unlock(dev); |
3541 | local_bh_enable(); | |
932ff279 HX |
3542 | } |
3543 | ||
c773e847 | 3544 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 3545 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3546 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
3547 | } \ |
3548 | } | |
3549 | ||
5efeac44 EB |
3550 | #define HARD_TX_TRYLOCK(dev, txq) \ |
3551 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
3552 | __netif_tx_trylock(txq) : \ | |
3553 | true ) | |
3554 | ||
c773e847 | 3555 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 3556 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3557 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
3558 | } \ |
3559 | } | |
3560 | ||
1da177e4 LT |
3561 | static inline void netif_tx_disable(struct net_device *dev) |
3562 | { | |
fd2ea0a7 | 3563 | unsigned int i; |
c3f26a26 | 3564 | int cpu; |
fd2ea0a7 | 3565 | |
c3f26a26 DM |
3566 | local_bh_disable(); |
3567 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
3568 | for (i = 0; i < dev->num_tx_queues; i++) { |
3569 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3570 | |
3571 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 3572 | netif_tx_stop_queue(txq); |
c3f26a26 | 3573 | __netif_tx_unlock(txq); |
fd2ea0a7 | 3574 | } |
c3f26a26 | 3575 | local_bh_enable(); |
1da177e4 LT |
3576 | } |
3577 | ||
e308a5d8 DM |
3578 | static inline void netif_addr_lock(struct net_device *dev) |
3579 | { | |
3580 | spin_lock(&dev->addr_list_lock); | |
3581 | } | |
3582 | ||
2429f7ac JP |
3583 | static inline void netif_addr_lock_nested(struct net_device *dev) |
3584 | { | |
25175ba5 VY |
3585 | int subclass = SINGLE_DEPTH_NESTING; |
3586 | ||
3587 | if (dev->netdev_ops->ndo_get_lock_subclass) | |
3588 | subclass = dev->netdev_ops->ndo_get_lock_subclass(dev); | |
3589 | ||
3590 | spin_lock_nested(&dev->addr_list_lock, subclass); | |
2429f7ac JP |
3591 | } |
3592 | ||
e308a5d8 DM |
3593 | static inline void netif_addr_lock_bh(struct net_device *dev) |
3594 | { | |
3595 | spin_lock_bh(&dev->addr_list_lock); | |
3596 | } | |
3597 | ||
3598 | static inline void netif_addr_unlock(struct net_device *dev) | |
3599 | { | |
3600 | spin_unlock(&dev->addr_list_lock); | |
3601 | } | |
3602 | ||
3603 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
3604 | { | |
3605 | spin_unlock_bh(&dev->addr_list_lock); | |
3606 | } | |
3607 | ||
f001fde5 | 3608 | /* |
31278e71 | 3609 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
3610 | * rcu_read_lock held. |
3611 | */ | |
3612 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 3613 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 3614 | |
1da177e4 LT |
3615 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
3616 | ||
f629d208 | 3617 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
3618 | |
3619 | /* Support for loadable net-drivers */ | |
f629d208 | 3620 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
c835a677 | 3621 | unsigned char name_assign_type, |
f629d208 JP |
3622 | void (*setup)(struct net_device *), |
3623 | unsigned int txqs, unsigned int rxqs); | |
c835a677 TG |
3624 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
3625 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) | |
36909ea4 | 3626 | |
c835a677 TG |
3627 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
3628 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ | |
3629 | count) | |
36909ea4 | 3630 | |
f629d208 JP |
3631 | int register_netdev(struct net_device *dev); |
3632 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 3633 | |
22bedad3 | 3634 | /* General hardware address lists handling functions */ |
f629d208 JP |
3635 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
3636 | struct netdev_hw_addr_list *from_list, int addr_len); | |
3637 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
3638 | struct netdev_hw_addr_list *from_list, int addr_len); | |
670e5b8e AD |
3639 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
3640 | struct net_device *dev, | |
3641 | int (*sync)(struct net_device *, const unsigned char *), | |
3642 | int (*unsync)(struct net_device *, | |
3643 | const unsigned char *)); | |
3644 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, | |
3645 | struct net_device *dev, | |
3646 | int (*unsync)(struct net_device *, | |
3647 | const unsigned char *)); | |
f629d208 | 3648 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 3649 | |
f001fde5 | 3650 | /* Functions used for device addresses handling */ |
f629d208 JP |
3651 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
3652 | unsigned char addr_type); | |
3653 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
3654 | unsigned char addr_type); | |
f629d208 JP |
3655 | void dev_addr_flush(struct net_device *dev); |
3656 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
3657 | |
3658 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
3659 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3660 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3661 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3662 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3663 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3664 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3665 | void dev_uc_flush(struct net_device *dev); | |
3666 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3667 | |
670e5b8e AD |
3668 | /** |
3669 | * __dev_uc_sync - Synchonize device's unicast list | |
3670 | * @dev: device to sync | |
3671 | * @sync: function to call if address should be added | |
3672 | * @unsync: function to call if address should be removed | |
3673 | * | |
3674 | * Add newly added addresses to the interface, and release | |
3675 | * addresses that have been deleted. | |
5e82b4b2 | 3676 | */ |
670e5b8e AD |
3677 | static inline int __dev_uc_sync(struct net_device *dev, |
3678 | int (*sync)(struct net_device *, | |
3679 | const unsigned char *), | |
3680 | int (*unsync)(struct net_device *, | |
3681 | const unsigned char *)) | |
3682 | { | |
3683 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); | |
3684 | } | |
3685 | ||
3686 | /** | |
e793c0f7 | 3687 | * __dev_uc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3688 | * @dev: device to sync |
3689 | * @unsync: function to call if address should be removed | |
3690 | * | |
3691 | * Remove all addresses that were added to the device by dev_uc_sync(). | |
5e82b4b2 | 3692 | */ |
670e5b8e AD |
3693 | static inline void __dev_uc_unsync(struct net_device *dev, |
3694 | int (*unsync)(struct net_device *, | |
3695 | const unsigned char *)) | |
3696 | { | |
3697 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); | |
3698 | } | |
3699 | ||
22bedad3 | 3700 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3701 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3702 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3703 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3704 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3705 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3706 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3707 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3708 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3709 | void dev_mc_flush(struct net_device *dev); | |
3710 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3711 | |
670e5b8e AD |
3712 | /** |
3713 | * __dev_mc_sync - Synchonize device's multicast list | |
3714 | * @dev: device to sync | |
3715 | * @sync: function to call if address should be added | |
3716 | * @unsync: function to call if address should be removed | |
3717 | * | |
3718 | * Add newly added addresses to the interface, and release | |
3719 | * addresses that have been deleted. | |
5e82b4b2 | 3720 | */ |
670e5b8e AD |
3721 | static inline int __dev_mc_sync(struct net_device *dev, |
3722 | int (*sync)(struct net_device *, | |
3723 | const unsigned char *), | |
3724 | int (*unsync)(struct net_device *, | |
3725 | const unsigned char *)) | |
3726 | { | |
3727 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); | |
3728 | } | |
3729 | ||
3730 | /** | |
e793c0f7 | 3731 | * __dev_mc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3732 | * @dev: device to sync |
3733 | * @unsync: function to call if address should be removed | |
3734 | * | |
3735 | * Remove all addresses that were added to the device by dev_mc_sync(). | |
5e82b4b2 | 3736 | */ |
670e5b8e AD |
3737 | static inline void __dev_mc_unsync(struct net_device *dev, |
3738 | int (*unsync)(struct net_device *, | |
3739 | const unsigned char *)) | |
3740 | { | |
3741 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); | |
3742 | } | |
3743 | ||
4417da66 | 3744 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3745 | void dev_set_rx_mode(struct net_device *dev); |
3746 | void __dev_set_rx_mode(struct net_device *dev); | |
3747 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3748 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3749 | void netdev_state_change(struct net_device *dev); | |
3750 | void netdev_notify_peers(struct net_device *dev); | |
3751 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3752 | /* Load a device via the kmod */ |
f629d208 JP |
3753 | void dev_load(struct net *net, const char *name); |
3754 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3755 | struct rtnl_link_stats64 *storage); | |
3756 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3757 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3758 | |
1da177e4 | 3759 | extern int netdev_max_backlog; |
3b098e2d | 3760 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3761 | extern int weight_p; |
9ff162a8 | 3762 | |
f629d208 | 3763 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
44a40855 VY |
3764 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
3765 | struct list_head **iter); | |
f629d208 JP |
3766 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3767 | struct list_head **iter); | |
8b5be856 | 3768 | |
44a40855 VY |
3769 | /* iterate through upper list, must be called under RCU read lock */ |
3770 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ | |
3771 | for (iter = &(dev)->adj_list.upper, \ | |
3772 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3773 | updev; \ | |
3774 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) | |
3775 | ||
8b5be856 | 3776 | /* iterate through upper list, must be called under RCU read lock */ |
2f268f12 VF |
3777 | #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
3778 | for (iter = &(dev)->all_adj_list.upper, \ | |
3779 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3780 | updev; \ | |
3781 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) | |
8b5be856 | 3782 | |
f629d208 JP |
3783 | void *netdev_lower_get_next_private(struct net_device *dev, |
3784 | struct list_head **iter); | |
3785 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3786 | struct list_head **iter); | |
31088a11 VF |
3787 | |
3788 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3789 | for (iter = (dev)->adj_list.lower.next, \ | |
3790 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3791 | priv; \ | |
3792 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3793 | ||
3794 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3795 | for (iter = &(dev)->adj_list.lower, \ | |
3796 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3797 | priv; \ | |
3798 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3799 | ||
4085ebe8 VY |
3800 | void *netdev_lower_get_next(struct net_device *dev, |
3801 | struct list_head **iter); | |
3802 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ | |
cfdd28be | 3803 | for (iter = (dev)->adj_list.lower.next, \ |
4085ebe8 VY |
3804 | ldev = netdev_lower_get_next(dev, &(iter)); \ |
3805 | ldev; \ | |
3806 | ldev = netdev_lower_get_next(dev, &(iter))) | |
3807 | ||
f629d208 | 3808 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3809 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3810 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3811 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
3812 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); | |
3813 | int netdev_master_upper_dev_link(struct net_device *dev, | |
6dffb044 | 3814 | struct net_device *upper_dev, |
29bf24af | 3815 | void *upper_priv, void *upper_info); |
f629d208 JP |
3816 | void netdev_upper_dev_unlink(struct net_device *dev, |
3817 | struct net_device *upper_dev); | |
5bb025fa | 3818 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
3819 | void *netdev_lower_dev_get_private(struct net_device *dev, |
3820 | struct net_device *lower_dev); | |
04d48266 JP |
3821 | void netdev_lower_state_changed(struct net_device *lower_dev, |
3822 | void *lower_state_info); | |
960fb622 ED |
3823 | |
3824 | /* RSS keys are 40 or 52 bytes long */ | |
3825 | #define NETDEV_RSS_KEY_LEN 52 | |
ba905f5e | 3826 | extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; |
960fb622 ED |
3827 | void netdev_rss_key_fill(void *buffer, size_t len); |
3828 | ||
4085ebe8 | 3829 | int dev_get_nest_level(struct net_device *dev, |
b618aaa9 | 3830 | bool (*type_check)(const struct net_device *dev)); |
f629d208 JP |
3831 | int skb_checksum_help(struct sk_buff *skb); |
3832 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, | |
3833 | netdev_features_t features, bool tx_path); | |
3834 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
3835 | netdev_features_t features); | |
12b0004d | 3836 | |
61bd3857 MS |
3837 | struct netdev_bonding_info { |
3838 | ifslave slave; | |
3839 | ifbond master; | |
3840 | }; | |
3841 | ||
3842 | struct netdev_notifier_bonding_info { | |
3843 | struct netdev_notifier_info info; /* must be first */ | |
3844 | struct netdev_bonding_info bonding_info; | |
3845 | }; | |
3846 | ||
3847 | void netdev_bonding_info_change(struct net_device *dev, | |
3848 | struct netdev_bonding_info *bonding_info); | |
3849 | ||
12b0004d CW |
3850 | static inline |
3851 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
3852 | { | |
3853 | return __skb_gso_segment(skb, features, true); | |
3854 | } | |
53d6471c | 3855 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
3856 | |
3857 | static inline bool can_checksum_protocol(netdev_features_t features, | |
3858 | __be16 protocol) | |
3859 | { | |
c8cd0989 TH |
3860 | if (protocol == htons(ETH_P_FCOE)) |
3861 | return !!(features & NETIF_F_FCOE_CRC); | |
3862 | ||
3863 | /* Assume this is an IP checksum (not SCTP CRC) */ | |
3864 | ||
3865 | if (features & NETIF_F_HW_CSUM) { | |
3866 | /* Can checksum everything */ | |
3867 | return true; | |
3868 | } | |
3869 | ||
3870 | switch (protocol) { | |
3871 | case htons(ETH_P_IP): | |
3872 | return !!(features & NETIF_F_IP_CSUM); | |
3873 | case htons(ETH_P_IPV6): | |
3874 | return !!(features & NETIF_F_IPV6_CSUM); | |
3875 | default: | |
3876 | return false; | |
3877 | } | |
ec5f0615 | 3878 | } |
12b0004d | 3879 | |
6ae23ad3 TH |
3880 | /* Map an ethertype into IP protocol if possible */ |
3881 | static inline int eproto_to_ipproto(int eproto) | |
3882 | { | |
3883 | switch (eproto) { | |
3884 | case htons(ETH_P_IP): | |
3885 | return IPPROTO_IP; | |
3886 | case htons(ETH_P_IPV6): | |
3887 | return IPPROTO_IPV6; | |
3888 | default: | |
3889 | return -1; | |
3890 | } | |
3891 | } | |
3892 | ||
fb286bb2 | 3893 | #ifdef CONFIG_BUG |
f629d208 | 3894 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
3895 | #else |
3896 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
3897 | { | |
3898 | } | |
3899 | #endif | |
1da177e4 | 3900 | /* rx skb timestamps */ |
f629d208 JP |
3901 | void net_enable_timestamp(void); |
3902 | void net_disable_timestamp(void); | |
1da177e4 | 3903 | |
20380731 | 3904 | #ifdef CONFIG_PROC_FS |
f629d208 | 3905 | int __init dev_proc_init(void); |
900ff8c6 CW |
3906 | #else |
3907 | #define dev_proc_init() 0 | |
20380731 ACM |
3908 | #endif |
3909 | ||
4798248e | 3910 | static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, |
fa2dbdc2 DM |
3911 | struct sk_buff *skb, struct net_device *dev, |
3912 | bool more) | |
4798248e | 3913 | { |
fa2dbdc2 | 3914 | skb->xmit_more = more ? 1 : 0; |
0b725a2c | 3915 | return ops->ndo_start_xmit(skb, dev); |
4798248e DM |
3916 | } |
3917 | ||
10b3ad8c | 3918 | static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, |
fa2dbdc2 | 3919 | struct netdev_queue *txq, bool more) |
4798248e DM |
3920 | { |
3921 | const struct net_device_ops *ops = dev->netdev_ops; | |
10b3ad8c | 3922 | int rc; |
4798248e | 3923 | |
fa2dbdc2 | 3924 | rc = __netdev_start_xmit(ops, skb, dev, more); |
10b3ad8c DM |
3925 | if (rc == NETDEV_TX_OK) |
3926 | txq_trans_update(txq); | |
3927 | ||
3928 | return rc; | |
4798248e DM |
3929 | } |
3930 | ||
42a2d923 LT |
3931 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
3932 | const void *ns); | |
3933 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, | |
3934 | const void *ns); | |
58292cbe TH |
3935 | |
3936 | static inline int netdev_class_create_file(struct class_attribute *class_attr) | |
3937 | { | |
3938 | return netdev_class_create_file_ns(class_attr, NULL); | |
3939 | } | |
3940 | ||
3941 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) | |
3942 | { | |
3943 | netdev_class_remove_file_ns(class_attr, NULL); | |
3944 | } | |
b8a9787e | 3945 | |
04600794 JB |
3946 | extern struct kobj_ns_type_operations net_ns_type_operations; |
3947 | ||
f629d208 | 3948 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 3949 | |
f629d208 | 3950 | void linkwatch_run_queue(void); |
20380731 | 3951 | |
da08143b MK |
3952 | static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, |
3953 | netdev_features_t f2) | |
3954 | { | |
c8cd0989 TH |
3955 | if ((f1 ^ f2) & NETIF_F_HW_CSUM) { |
3956 | if (f1 & NETIF_F_HW_CSUM) | |
b6a0e72a | 3957 | f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 3958 | else |
b6a0e72a | 3959 | f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 3960 | } |
da08143b | 3961 | |
c8cd0989 | 3962 | return f1 & f2; |
da08143b MK |
3963 | } |
3964 | ||
c8f44aff MM |
3965 | static inline netdev_features_t netdev_get_wanted_features( |
3966 | struct net_device *dev) | |
5455c699 MM |
3967 | { |
3968 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
3969 | } | |
c8f44aff MM |
3970 | netdev_features_t netdev_increment_features(netdev_features_t all, |
3971 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
3972 | |
3973 | /* Allow TSO being used on stacked device : | |
3974 | * Performing the GSO segmentation before last device | |
3975 | * is a performance improvement. | |
3976 | */ | |
3977 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
3978 | netdev_features_t mask) | |
3979 | { | |
3980 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
3981 | } | |
3982 | ||
6cb6a27c | 3983 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 3984 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 3985 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 3986 | |
fc4a7489 PM |
3987 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
3988 | struct net_device *dev); | |
3989 | ||
e38f3025 TM |
3990 | netdev_features_t passthru_features_check(struct sk_buff *skb, |
3991 | struct net_device *dev, | |
3992 | netdev_features_t features); | |
c1e756bf | 3993 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 3994 | |
4d29515f | 3995 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 3996 | { |
7b748340 | 3997 | netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
3998 | |
3999 | /* check flags correspondence */ | |
4000 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
4001 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
4002 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
4003 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
cbc53e08 | 4004 | BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); |
0345e186 MM |
4005 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
4006 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4007 | BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); |
4008 | BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); | |
7e13318d TH |
4009 | BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); |
4010 | BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4011 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); |
4012 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); | |
802ab55a | 4013 | BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); |
e585f236 | 4014 | BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); |
0345e186 | 4015 | |
d6b4991a | 4016 | return (features & feature) == feature; |
576a30eb HX |
4017 | } |
4018 | ||
4d29515f | 4019 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 4020 | { |
278b2513 | 4021 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 4022 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
4023 | } |
4024 | ||
8b86a61d | 4025 | static inline bool netif_needs_gso(struct sk_buff *skb, |
4d29515f | 4026 | netdev_features_t features) |
7967168c | 4027 | { |
fc741216 | 4028 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
4029 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
4030 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
4031 | } |
4032 | ||
82cc1a7a PWJ |
4033 | static inline void netif_set_gso_max_size(struct net_device *dev, |
4034 | unsigned int size) | |
4035 | { | |
4036 | dev->gso_max_size = size; | |
4037 | } | |
4038 | ||
7a7ffbab WCC |
4039 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
4040 | int pulled_hlen, u16 mac_offset, | |
4041 | int mac_len) | |
4042 | { | |
4043 | skb->protocol = protocol; | |
4044 | skb->encapsulation = 1; | |
4045 | skb_push(skb, pulled_hlen); | |
4046 | skb_reset_transport_header(skb); | |
4047 | skb->mac_header = mac_offset; | |
4048 | skb->network_header = skb->mac_header + mac_len; | |
4049 | skb->mac_len = mac_len; | |
4050 | } | |
4051 | ||
3c175784 SD |
4052 | static inline bool netif_is_macsec(const struct net_device *dev) |
4053 | { | |
4054 | return dev->priv_flags & IFF_MACSEC; | |
4055 | } | |
4056 | ||
b618aaa9 | 4057 | static inline bool netif_is_macvlan(const struct net_device *dev) |
a6cc0cfa JF |
4058 | { |
4059 | return dev->priv_flags & IFF_MACVLAN; | |
4060 | } | |
4061 | ||
b618aaa9 | 4062 | static inline bool netif_is_macvlan_port(const struct net_device *dev) |
2f33e7d5 MB |
4063 | { |
4064 | return dev->priv_flags & IFF_MACVLAN_PORT; | |
4065 | } | |
4066 | ||
b618aaa9 | 4067 | static inline bool netif_is_ipvlan(const struct net_device *dev) |
5933fea7 MB |
4068 | { |
4069 | return dev->priv_flags & IFF_IPVLAN_SLAVE; | |
4070 | } | |
4071 | ||
b618aaa9 | 4072 | static inline bool netif_is_ipvlan_port(const struct net_device *dev) |
5933fea7 MB |
4073 | { |
4074 | return dev->priv_flags & IFF_IPVLAN_MASTER; | |
4075 | } | |
4076 | ||
b618aaa9 | 4077 | static inline bool netif_is_bond_master(const struct net_device *dev) |
8a7fbfab | 4078 | { |
4079 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
4080 | } | |
4081 | ||
b618aaa9 | 4082 | static inline bool netif_is_bond_slave(const struct net_device *dev) |
1765a575 JP |
4083 | { |
4084 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
4085 | } | |
4086 | ||
3bdc0eba BG |
4087 | static inline bool netif_supports_nofcs(struct net_device *dev) |
4088 | { | |
4089 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
4090 | } | |
4091 | ||
007979ea | 4092 | static inline bool netif_is_l3_master(const struct net_device *dev) |
4e3c8992 | 4093 | { |
007979ea | 4094 | return dev->priv_flags & IFF_L3MDEV_MASTER; |
4e3c8992 DA |
4095 | } |
4096 | ||
fee6d4c7 DA |
4097 | static inline bool netif_is_l3_slave(const struct net_device *dev) |
4098 | { | |
4099 | return dev->priv_flags & IFF_L3MDEV_SLAVE; | |
4100 | } | |
4101 | ||
0894ae3f JP |
4102 | static inline bool netif_is_bridge_master(const struct net_device *dev) |
4103 | { | |
4104 | return dev->priv_flags & IFF_EBRIDGE; | |
4105 | } | |
4106 | ||
28f9ee22 VY |
4107 | static inline bool netif_is_bridge_port(const struct net_device *dev) |
4108 | { | |
4109 | return dev->priv_flags & IFF_BRIDGE_PORT; | |
4110 | } | |
4111 | ||
35d4e172 JP |
4112 | static inline bool netif_is_ovs_master(const struct net_device *dev) |
4113 | { | |
4114 | return dev->priv_flags & IFF_OPENVSWITCH; | |
4115 | } | |
4116 | ||
b618aaa9 | 4117 | static inline bool netif_is_team_master(const struct net_device *dev) |
c981e421 JP |
4118 | { |
4119 | return dev->priv_flags & IFF_TEAM; | |
4120 | } | |
4121 | ||
b618aaa9 | 4122 | static inline bool netif_is_team_port(const struct net_device *dev) |
f7f019ee JP |
4123 | { |
4124 | return dev->priv_flags & IFF_TEAM_PORT; | |
4125 | } | |
4126 | ||
b618aaa9 | 4127 | static inline bool netif_is_lag_master(const struct net_device *dev) |
7be61833 JP |
4128 | { |
4129 | return netif_is_bond_master(dev) || netif_is_team_master(dev); | |
4130 | } | |
4131 | ||
b618aaa9 | 4132 | static inline bool netif_is_lag_port(const struct net_device *dev) |
e0ba1414 JP |
4133 | { |
4134 | return netif_is_bond_slave(dev) || netif_is_team_port(dev); | |
4135 | } | |
4136 | ||
d4ab4286 KJ |
4137 | static inline bool netif_is_rxfh_configured(const struct net_device *dev) |
4138 | { | |
4139 | return dev->priv_flags & IFF_RXFH_CONFIGURED; | |
4140 | } | |
4141 | ||
02875878 ED |
4142 | /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ |
4143 | static inline void netif_keep_dst(struct net_device *dev) | |
4144 | { | |
4145 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); | |
4146 | } | |
4147 | ||
505d4f73 | 4148 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 4149 | |
571ba423 JP |
4150 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
4151 | ||
4152 | /* netdev_printk helpers, similar to dev_printk */ | |
4153 | ||
4154 | static inline const char *netdev_name(const struct net_device *dev) | |
4155 | { | |
c6f854d5 VF |
4156 | if (!dev->name[0] || strchr(dev->name, '%')) |
4157 | return "(unnamed net_device)"; | |
571ba423 JP |
4158 | return dev->name; |
4159 | } | |
4160 | ||
ccc7f496 VF |
4161 | static inline const char *netdev_reg_state(const struct net_device *dev) |
4162 | { | |
4163 | switch (dev->reg_state) { | |
4164 | case NETREG_UNINITIALIZED: return " (uninitialized)"; | |
4165 | case NETREG_REGISTERED: return ""; | |
4166 | case NETREG_UNREGISTERING: return " (unregistering)"; | |
4167 | case NETREG_UNREGISTERED: return " (unregistered)"; | |
4168 | case NETREG_RELEASED: return " (released)"; | |
4169 | case NETREG_DUMMY: return " (dummy)"; | |
4170 | } | |
4171 | ||
4172 | WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state); | |
4173 | return " (unknown)"; | |
4174 | } | |
4175 | ||
f629d208 | 4176 | __printf(3, 4) |
6ea754eb JP |
4177 | void netdev_printk(const char *level, const struct net_device *dev, |
4178 | const char *format, ...); | |
f629d208 | 4179 | __printf(2, 3) |
6ea754eb | 4180 | void netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 4181 | __printf(2, 3) |
6ea754eb | 4182 | void netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 4183 | __printf(2, 3) |
6ea754eb | 4184 | void netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 4185 | __printf(2, 3) |
6ea754eb | 4186 | void netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 4187 | __printf(2, 3) |
6ea754eb | 4188 | void netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 4189 | __printf(2, 3) |
6ea754eb | 4190 | void netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 4191 | __printf(2, 3) |
6ea754eb | 4192 | void netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 4193 | |
8909c9ad VK |
4194 | #define MODULE_ALIAS_NETDEV(device) \ |
4195 | MODULE_ALIAS("netdev-" device) | |
4196 | ||
b558c96f | 4197 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
4198 | #define netdev_dbg(__dev, format, args...) \ |
4199 | do { \ | |
ffa10cb4 | 4200 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 4201 | } while (0) |
b558c96f JC |
4202 | #elif defined(DEBUG) |
4203 | #define netdev_dbg(__dev, format, args...) \ | |
4204 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
4205 | #else |
4206 | #define netdev_dbg(__dev, format, args...) \ | |
4207 | ({ \ | |
4208 | if (0) \ | |
4209 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
571ba423 JP |
4210 | }) |
4211 | #endif | |
4212 | ||
4213 | #if defined(VERBOSE_DEBUG) | |
4214 | #define netdev_vdbg netdev_dbg | |
4215 | #else | |
4216 | ||
4217 | #define netdev_vdbg(dev, format, args...) \ | |
4218 | ({ \ | |
4219 | if (0) \ | |
4220 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
4221 | 0; \ | |
4222 | }) | |
4223 | #endif | |
4224 | ||
4225 | /* | |
4226 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
4227 | * of using a WARN/WARN_ON to get the message out, including the | |
4228 | * file/line information and a backtrace. | |
4229 | */ | |
4230 | #define netdev_WARN(dev, format, args...) \ | |
ccc7f496 VF |
4231 | WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \ |
4232 | netdev_reg_state(dev), ##args) | |
571ba423 | 4233 | |
b3d95c5c JP |
4234 | /* netif printk helpers, similar to netdev_printk */ |
4235 | ||
4236 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
4237 | do { \ | |
4238 | if (netif_msg_##type(priv)) \ | |
4239 | netdev_printk(level, (dev), fmt, ##args); \ | |
4240 | } while (0) | |
4241 | ||
f45f4321 JP |
4242 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
4243 | do { \ | |
4244 | if (netif_msg_##type(priv)) \ | |
4245 | netdev_##level(dev, fmt, ##args); \ | |
4246 | } while (0) | |
4247 | ||
b3d95c5c | 4248 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 4249 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 4250 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 4251 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 4252 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 4253 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 4254 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 4255 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 4256 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 4257 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 4258 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 4259 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 4260 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 4261 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 4262 | |
0053ea9c | 4263 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
4264 | #define netif_dbg(priv, type, netdev, format, args...) \ |
4265 | do { \ | |
4266 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 4267 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 4268 | } while (0) |
0053ea9c JP |
4269 | #elif defined(DEBUG) |
4270 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4271 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
4272 | #else |
4273 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4274 | ({ \ | |
4275 | if (0) \ | |
4276 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
4277 | 0; \ | |
4278 | }) | |
4279 | #endif | |
4280 | ||
4281 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 4282 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
4283 | #else |
4284 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
4285 | ({ \ | |
4286 | if (0) \ | |
a4ed89cb | 4287 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
4288 | 0; \ |
4289 | }) | |
4290 | #endif | |
571ba423 | 4291 | |
900ff8c6 CW |
4292 | /* |
4293 | * The list of packet types we will receive (as opposed to discard) | |
4294 | * and the routines to invoke. | |
4295 | * | |
4296 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
4297 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
4298 | * | |
4299 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
4300 | * sure which should go first, but I bet it won't make much | |
4301 | * difference if we are running VLANs. The good news is that | |
4302 | * this protocol won't be in the list unless compiled in, so | |
4303 | * the average user (w/out VLANs) will not be adversely affected. | |
4304 | * --BLG | |
4305 | * | |
4306 | * 0800 IP | |
4307 | * 8100 802.1Q VLAN | |
4308 | * 0001 802.3 | |
4309 | * 0002 AX.25 | |
4310 | * 0004 802.2 | |
4311 | * 8035 RARP | |
4312 | * 0005 SNAP | |
4313 | * 0805 X.25 | |
4314 | * 0806 ARP | |
4315 | * 8137 IPX | |
4316 | * 0009 Localtalk | |
4317 | * 86DD IPv6 | |
4318 | */ | |
4319 | #define PTYPE_HASH_SIZE (16) | |
4320 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
4321 | ||
385a154c | 4322 | #endif /* _LINUX_NETDEVICE_H */ |