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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> |
59cc1f61 | 55 | #include <linux/hashtable.h> |
a59e2ecb | 56 | |
115c1d6e | 57 | struct netpoll_info; |
313162d0 | 58 | struct device; |
c1f19b51 | 59 | struct phy_device; |
704232c2 JB |
60 | /* 802.11 specific */ |
61 | struct wireless_dev; | |
98a18b6f AA |
62 | /* 802.15.4 specific */ |
63 | struct wpan_dev; | |
03c57747 | 64 | struct mpls_dev; |
7c46a640 AD |
65 | /* UDP Tunnel offloads */ |
66 | struct udp_tunnel_info; | |
a7862b45 | 67 | struct bpf_prog; |
1da177e4 | 68 | |
f629d208 JP |
69 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
70 | const struct ethtool_ops *ops); | |
d07d7507 | 71 | |
9a1654ba JP |
72 | /* Backlog congestion levels */ |
73 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
74 | #define NET_RX_DROP 1 /* packet dropped */ | |
75 | ||
572a9d7b PM |
76 | /* |
77 | * Transmit return codes: transmit return codes originate from three different | |
78 | * namespaces: | |
79 | * | |
80 | * - qdisc return codes | |
81 | * - driver transmit return codes | |
82 | * - errno values | |
83 | * | |
84 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
85 | * function. Real network devices commonly used with qdiscs should only return | |
86 | * the driver transmit return codes though - when qdiscs are used, the actual | |
87 | * transmission happens asynchronously, so the value is not propagated to | |
5e82b4b2 BH |
88 | * higher layers. Virtual network devices transmit synchronously; in this case |
89 | * the driver transmit return codes are consumed by dev_queue_xmit(), and all | |
572a9d7b PM |
90 | * others are propagated to higher layers. |
91 | */ | |
92 | ||
93 | /* qdisc ->enqueue() return codes. */ | |
94 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
95 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
96 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
9a1654ba | 97 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
1da177e4 | 98 | |
b9df3cb8 GR |
99 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
100 | * indicates that the device will soon be dropping packets, or already drops | |
101 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 102 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
103 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
104 | ||
dc1f8bf6 | 105 | /* Driver transmit return codes */ |
9a1654ba | 106 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 107 | |
dc1f8bf6 | 108 | enum netdev_tx { |
572a9d7b | 109 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
110 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
111 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
dc1f8bf6 SH |
112 | }; |
113 | typedef enum netdev_tx netdev_tx_t; | |
114 | ||
9a1654ba JP |
115 | /* |
116 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
117 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
118 | */ | |
119 | static inline bool dev_xmit_complete(int rc) | |
120 | { | |
121 | /* | |
122 | * Positive cases with an skb consumed by a driver: | |
123 | * - successful transmission (rc == NETDEV_TX_OK) | |
124 | * - error while transmitting (rc < 0) | |
125 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
126 | */ | |
127 | if (likely(rc < NET_XMIT_MASK)) | |
128 | return true; | |
129 | ||
130 | return false; | |
131 | } | |
132 | ||
1da177e4 | 133 | /* |
5e82b4b2 | 134 | * Compute the worst-case header length according to the protocols |
1da177e4 LT |
135 | * used. |
136 | */ | |
fe2918b0 | 137 | |
c0eb4540 KS |
138 | #if defined(CONFIG_HYPERV_NET) |
139 | # define LL_MAX_HEADER 128 | |
140 | #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) | |
8388e3da DM |
141 | # if defined(CONFIG_MAC80211_MESH) |
142 | # define LL_MAX_HEADER 128 | |
143 | # else | |
144 | # define LL_MAX_HEADER 96 | |
145 | # endif | |
1da177e4 | 146 | #else |
8388e3da | 147 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
148 | #endif |
149 | ||
d11ead75 BH |
150 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
151 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
152 | #define MAX_HEADER LL_MAX_HEADER |
153 | #else | |
154 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
155 | #endif | |
156 | ||
157 | /* | |
be1f3c2c BH |
158 | * Old network device statistics. Fields are native words |
159 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 160 | */ |
fe2918b0 | 161 | |
d94d9fee | 162 | struct net_device_stats { |
3cfde79c BH |
163 | unsigned long rx_packets; |
164 | unsigned long tx_packets; | |
165 | unsigned long rx_bytes; | |
166 | unsigned long tx_bytes; | |
167 | unsigned long rx_errors; | |
168 | unsigned long tx_errors; | |
169 | unsigned long rx_dropped; | |
170 | unsigned long tx_dropped; | |
171 | unsigned long multicast; | |
1da177e4 | 172 | unsigned long collisions; |
1da177e4 | 173 | unsigned long rx_length_errors; |
3cfde79c BH |
174 | unsigned long rx_over_errors; |
175 | unsigned long rx_crc_errors; | |
176 | unsigned long rx_frame_errors; | |
177 | unsigned long rx_fifo_errors; | |
178 | unsigned long rx_missed_errors; | |
1da177e4 LT |
179 | unsigned long tx_aborted_errors; |
180 | unsigned long tx_carrier_errors; | |
181 | unsigned long tx_fifo_errors; | |
182 | unsigned long tx_heartbeat_errors; | |
183 | unsigned long tx_window_errors; | |
1da177e4 LT |
184 | unsigned long rx_compressed; |
185 | unsigned long tx_compressed; | |
186 | }; | |
187 | ||
1da177e4 LT |
188 | |
189 | #include <linux/cache.h> | |
190 | #include <linux/skbuff.h> | |
191 | ||
adc9300e | 192 | #ifdef CONFIG_RPS |
c5905afb IM |
193 | #include <linux/static_key.h> |
194 | extern struct static_key rps_needed; | |
13bfff25 | 195 | extern struct static_key rfs_needed; |
adc9300e ED |
196 | #endif |
197 | ||
1da177e4 LT |
198 | struct neighbour; |
199 | struct neigh_parms; | |
200 | struct sk_buff; | |
201 | ||
f001fde5 JP |
202 | struct netdev_hw_addr { |
203 | struct list_head list; | |
204 | unsigned char addr[MAX_ADDR_LEN]; | |
205 | unsigned char type; | |
ccffad25 JP |
206 | #define NETDEV_HW_ADDR_T_LAN 1 |
207 | #define NETDEV_HW_ADDR_T_SAN 2 | |
208 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
209 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 210 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
22bedad3 | 211 | bool global_use; |
4cd729b0 | 212 | int sync_cnt; |
8f8f103d | 213 | int refcount; |
4543fbef | 214 | int synced; |
f001fde5 JP |
215 | struct rcu_head rcu_head; |
216 | }; | |
217 | ||
31278e71 JP |
218 | struct netdev_hw_addr_list { |
219 | struct list_head list; | |
220 | int count; | |
221 | }; | |
222 | ||
22bedad3 JP |
223 | #define netdev_hw_addr_list_count(l) ((l)->count) |
224 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
225 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
226 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 227 | |
22bedad3 JP |
228 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
229 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
230 | #define netdev_for_each_uc_addr(ha, dev) \ | |
231 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 232 | |
22bedad3 JP |
233 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
234 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 235 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 236 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 237 | |
d94d9fee | 238 | struct hh_cache { |
f6b72b62 | 239 | u16 hh_len; |
5c25f686 | 240 | u16 __pad; |
3644f0ce | 241 | seqlock_t hh_lock; |
1da177e4 LT |
242 | |
243 | /* cached hardware header; allow for machine alignment needs. */ | |
244 | #define HH_DATA_MOD 16 | |
245 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 246 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
247 | #define HH_DATA_ALIGN(__len) \ |
248 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
249 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
250 | }; | |
251 | ||
5e82b4b2 | 252 | /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
1da177e4 LT |
253 | * Alternative is: |
254 | * dev->hard_header_len ? (dev->hard_header_len + | |
255 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
256 | * | |
257 | * We could use other alignment values, but we must maintain the | |
258 | * relationship HH alignment <= LL alignment. | |
259 | */ | |
260 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 261 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 262 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 263 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 264 | |
3b04ddde SH |
265 | struct header_ops { |
266 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
267 | unsigned short type, const void *daddr, | |
95c96174 | 268 | const void *saddr, unsigned int len); |
3b04ddde | 269 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
e69dd336 | 270 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
271 | void (*cache_update)(struct hh_cache *hh, |
272 | const struct net_device *dev, | |
273 | const unsigned char *haddr); | |
2793a23a | 274 | bool (*validate)(const char *ll_header, unsigned int len); |
3b04ddde SH |
275 | }; |
276 | ||
1da177e4 | 277 | /* These flag bits are private to the generic network queueing |
5e82b4b2 | 278 | * layer; they may not be explicitly referenced by any other |
1da177e4 LT |
279 | * code. |
280 | */ | |
281 | ||
d94d9fee | 282 | enum netdev_state_t { |
1da177e4 LT |
283 | __LINK_STATE_START, |
284 | __LINK_STATE_PRESENT, | |
1da177e4 | 285 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
286 | __LINK_STATE_LINKWATCH_PENDING, |
287 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
288 | }; |
289 | ||
290 | ||
291 | /* | |
5e82b4b2 | 292 | * This structure holds boot-time configured netdevice settings. They |
fe2918b0 | 293 | * are then used in the device probing. |
1da177e4 LT |
294 | */ |
295 | struct netdev_boot_setup { | |
296 | char name[IFNAMSIZ]; | |
297 | struct ifmap map; | |
298 | }; | |
299 | #define NETDEV_BOOT_SETUP_MAX 8 | |
300 | ||
f629d208 | 301 | int __init netdev_boot_setup(char *str); |
1da177e4 | 302 | |
bea3348e SH |
303 | /* |
304 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
305 | */ | |
306 | struct napi_struct { | |
307 | /* The poll_list must only be managed by the entity which | |
308 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
309 | * whoever atomically sets that bit can add this napi_struct | |
5e82b4b2 | 310 | * to the per-CPU poll_list, and whoever clears that bit |
bea3348e SH |
311 | * can remove from the list right before clearing the bit. |
312 | */ | |
313 | struct list_head poll_list; | |
314 | ||
315 | unsigned long state; | |
316 | int weight; | |
404f7c9e | 317 | unsigned int gro_count; |
bea3348e SH |
318 | int (*poll)(struct napi_struct *, int); |
319 | #ifdef CONFIG_NETPOLL | |
bea3348e | 320 | int poll_owner; |
bea3348e | 321 | #endif |
5d38a079 | 322 | struct net_device *dev; |
d565b0a1 | 323 | struct sk_buff *gro_list; |
5d38a079 | 324 | struct sk_buff *skb; |
3b47d303 | 325 | struct hrtimer timer; |
404f7c9e | 326 | struct list_head dev_list; |
af12fa6e ET |
327 | struct hlist_node napi_hash_node; |
328 | unsigned int napi_id; | |
bea3348e SH |
329 | }; |
330 | ||
d94d9fee | 331 | enum { |
bea3348e | 332 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 333 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 334 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
d64b5e85 ED |
335 | NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */ |
336 | NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */ | |
217f6974 ED |
337 | NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */ |
338 | }; | |
339 | ||
340 | enum { | |
341 | NAPIF_STATE_SCHED = (1UL << NAPI_STATE_SCHED), | |
342 | NAPIF_STATE_DISABLE = (1UL << NAPI_STATE_DISABLE), | |
343 | NAPIF_STATE_NPSVC = (1UL << NAPI_STATE_NPSVC), | |
344 | NAPIF_STATE_HASHED = (1UL << NAPI_STATE_HASHED), | |
345 | NAPIF_STATE_NO_BUSY_POLL = (1UL << NAPI_STATE_NO_BUSY_POLL), | |
346 | NAPIF_STATE_IN_BUSY_POLL = (1UL << NAPI_STATE_IN_BUSY_POLL), | |
bea3348e SH |
347 | }; |
348 | ||
5b252f0c | 349 | enum gro_result { |
d1c76af9 HX |
350 | GRO_MERGED, |
351 | GRO_MERGED_FREE, | |
352 | GRO_HELD, | |
353 | GRO_NORMAL, | |
354 | GRO_DROP, | |
355 | }; | |
5b252f0c | 356 | typedef enum gro_result gro_result_t; |
d1c76af9 | 357 | |
8a4eb573 JP |
358 | /* |
359 | * enum rx_handler_result - Possible return values for rx_handlers. | |
360 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
361 | * further. | |
362 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
363 | * case skb->dev was changed by rx_handler. | |
364 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
5e82b4b2 | 365 | * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
8a4eb573 JP |
366 | * |
367 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
368 | * special processing of the skb, prior to delivery to protocol handlers. | |
369 | * | |
370 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
371 | * to register a second rx_handler will return -EBUSY. | |
372 | * | |
373 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
374 | * To unregister a rx_handler on a net_device, use | |
375 | * netdev_rx_handler_unregister(). | |
376 | * | |
377 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
378 | * do with the skb. | |
379 | * | |
5e82b4b2 | 380 | * If the rx_handler consumed the skb in some way, it should return |
8a4eb573 | 381 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
5e82b4b2 | 382 | * the skb to be delivered in some other way. |
8a4eb573 JP |
383 | * |
384 | * If the rx_handler changed skb->dev, to divert the skb to another | |
385 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
386 | * new device will be called if it exists. | |
387 | * | |
5e82b4b2 | 388 | * If the rx_handler decides the skb should be ignored, it should return |
8a4eb573 | 389 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
d93cf068 | 390 | * are registered on exact device (ptype->dev == skb->dev). |
8a4eb573 | 391 | * |
5e82b4b2 | 392 | * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
8a4eb573 JP |
393 | * delivered, it should return RX_HANDLER_PASS. |
394 | * | |
395 | * A device without a registered rx_handler will behave as if rx_handler | |
396 | * returned RX_HANDLER_PASS. | |
397 | */ | |
398 | ||
399 | enum rx_handler_result { | |
400 | RX_HANDLER_CONSUMED, | |
401 | RX_HANDLER_ANOTHER, | |
402 | RX_HANDLER_EXACT, | |
403 | RX_HANDLER_PASS, | |
404 | }; | |
405 | typedef enum rx_handler_result rx_handler_result_t; | |
406 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 407 | |
f629d208 | 408 | void __napi_schedule(struct napi_struct *n); |
bc9ad166 | 409 | void __napi_schedule_irqoff(struct napi_struct *n); |
bea3348e | 410 | |
4d29515f | 411 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
412 | { |
413 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
414 | } | |
415 | ||
bea3348e | 416 | /** |
5e82b4b2 BH |
417 | * napi_schedule_prep - check if NAPI can be scheduled |
418 | * @n: NAPI context | |
bea3348e SH |
419 | * |
420 | * Test if NAPI routine is already running, and if not mark | |
5e82b4b2 | 421 | * it as running. This is used as a condition variable to |
a0a46196 DM |
422 | * insure only one NAPI poll instance runs. We also make |
423 | * sure there is no pending NAPI disable. | |
bea3348e | 424 | */ |
4d29515f | 425 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 426 | { |
a0a46196 DM |
427 | return !napi_disable_pending(n) && |
428 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
429 | } |
430 | ||
431 | /** | |
432 | * napi_schedule - schedule NAPI poll | |
5e82b4b2 | 433 | * @n: NAPI context |
bea3348e SH |
434 | * |
435 | * Schedule NAPI poll routine to be called if it is not already | |
436 | * running. | |
437 | */ | |
438 | static inline void napi_schedule(struct napi_struct *n) | |
439 | { | |
440 | if (napi_schedule_prep(n)) | |
441 | __napi_schedule(n); | |
442 | } | |
443 | ||
bc9ad166 ED |
444 | /** |
445 | * napi_schedule_irqoff - schedule NAPI poll | |
5e82b4b2 | 446 | * @n: NAPI context |
bc9ad166 ED |
447 | * |
448 | * Variant of napi_schedule(), assuming hard irqs are masked. | |
449 | */ | |
450 | static inline void napi_schedule_irqoff(struct napi_struct *n) | |
451 | { | |
452 | if (napi_schedule_prep(n)) | |
453 | __napi_schedule_irqoff(n); | |
454 | } | |
455 | ||
bfe13f54 | 456 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 457 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
458 | { |
459 | if (napi_schedule_prep(napi)) { | |
460 | __napi_schedule(napi); | |
4d29515f | 461 | return true; |
bfe13f54 | 462 | } |
4d29515f | 463 | return false; |
bfe13f54 RD |
464 | } |
465 | ||
364b6055 ED |
466 | bool __napi_complete(struct napi_struct *n); |
467 | bool napi_complete_done(struct napi_struct *n, int work_done); | |
bea3348e SH |
468 | /** |
469 | * napi_complete - NAPI processing complete | |
5e82b4b2 | 470 | * @n: NAPI context |
bea3348e SH |
471 | * |
472 | * Mark NAPI processing as complete. | |
3b47d303 | 473 | * Consider using napi_complete_done() instead. |
364b6055 | 474 | * Return false if device should avoid rearming interrupts. |
bea3348e | 475 | */ |
364b6055 | 476 | static inline bool napi_complete(struct napi_struct *n) |
3b47d303 ED |
477 | { |
478 | return napi_complete_done(n, 0); | |
479 | } | |
bea3348e | 480 | |
af12fa6e ET |
481 | /** |
482 | * napi_hash_del - remove a NAPI from global table | |
5e82b4b2 | 483 | * @napi: NAPI context |
af12fa6e | 484 | * |
5e82b4b2 | 485 | * Warning: caller must observe RCU grace period |
34cbe27e ED |
486 | * before freeing memory containing @napi, if |
487 | * this function returns true. | |
93d05d4a | 488 | * Note: core networking stack automatically calls it |
5e82b4b2 | 489 | * from netif_napi_del(). |
93d05d4a | 490 | * Drivers might want to call this helper to combine all |
5e82b4b2 | 491 | * the needed RCU grace periods into a single one. |
af12fa6e | 492 | */ |
34cbe27e | 493 | bool napi_hash_del(struct napi_struct *napi); |
af12fa6e | 494 | |
bea3348e SH |
495 | /** |
496 | * napi_disable - prevent NAPI from scheduling | |
5e82b4b2 | 497 | * @n: NAPI context |
bea3348e SH |
498 | * |
499 | * Stop NAPI from being scheduled on this context. | |
500 | * Waits till any outstanding processing completes. | |
501 | */ | |
3b47d303 | 502 | void napi_disable(struct napi_struct *n); |
bea3348e SH |
503 | |
504 | /** | |
505 | * napi_enable - enable NAPI scheduling | |
5e82b4b2 | 506 | * @n: NAPI context |
bea3348e SH |
507 | * |
508 | * Resume NAPI from being scheduled on this context. | |
509 | * Must be paired with napi_disable. | |
510 | */ | |
511 | static inline void napi_enable(struct napi_struct *n) | |
512 | { | |
513 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
4e857c58 | 514 | smp_mb__before_atomic(); |
bea3348e | 515 | clear_bit(NAPI_STATE_SCHED, &n->state); |
2d8bff12 | 516 | clear_bit(NAPI_STATE_NPSVC, &n->state); |
bea3348e SH |
517 | } |
518 | ||
c264c3de SH |
519 | /** |
520 | * napi_synchronize - wait until NAPI is not running | |
5e82b4b2 | 521 | * @n: NAPI context |
c264c3de SH |
522 | * |
523 | * Wait until NAPI is done being scheduled on this context. | |
524 | * Waits till any outstanding processing completes but | |
525 | * does not disable future activations. | |
526 | */ | |
527 | static inline void napi_synchronize(const struct napi_struct *n) | |
528 | { | |
facc432f AB |
529 | if (IS_ENABLED(CONFIG_SMP)) |
530 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
531 | msleep(1); | |
532 | else | |
533 | barrier(); | |
c264c3de | 534 | } |
c264c3de | 535 | |
d94d9fee | 536 | enum netdev_queue_state_t { |
73466498 TH |
537 | __QUEUE_STATE_DRV_XOFF, |
538 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 539 | __QUEUE_STATE_FROZEN, |
79d16385 | 540 | }; |
8e2f1a63 DB |
541 | |
542 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) | |
543 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) | |
544 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) | |
545 | ||
546 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) | |
547 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
548 | QUEUE_STATE_FROZEN) | |
549 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ | |
550 | QUEUE_STATE_FROZEN) | |
551 | ||
73466498 TH |
552 | /* |
553 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
554 | * netif_tx_* functions below are used to manipulate this flag. The | |
555 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
556 | * queue independently. The netif_xmit_*stopped functions below are called | |
557 | * to check if the queue has been stopped by the driver or stack (either | |
558 | * of the XOFF bits are set in the state). Drivers should not need to call | |
559 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
560 | */ | |
79d16385 | 561 | |
bb949fbd | 562 | struct netdev_queue { |
6a321cb3 | 563 | /* |
5e82b4b2 | 564 | * read-mostly part |
6a321cb3 | 565 | */ |
bb949fbd | 566 | struct net_device *dev; |
46e5da40 | 567 | struct Qdisc __rcu *qdisc; |
b0e1e646 | 568 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 569 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
570 | struct kobject kobj; |
571 | #endif | |
f2cd2d3e ED |
572 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
573 | int numa_node; | |
574 | #endif | |
c0ef079c FW |
575 | unsigned long tx_maxrate; |
576 | /* | |
577 | * Number of TX timeouts for this queue | |
578 | * (/sys/class/net/DEV/Q/trans_timeout) | |
579 | */ | |
580 | unsigned long trans_timeout; | |
6a321cb3 | 581 | /* |
5e82b4b2 | 582 | * write-mostly part |
6a321cb3 ED |
583 | */ |
584 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
585 | int xmit_lock_owner; | |
9d21493b | 586 | /* |
9b36627a | 587 | * Time (in jiffies) of last Tx |
9d21493b ED |
588 | */ |
589 | unsigned long trans_start; | |
ccf5ff69 | 590 | |
114cf580 TH |
591 | unsigned long state; |
592 | ||
593 | #ifdef CONFIG_BQL | |
594 | struct dql dql; | |
595 | #endif | |
e8a0464c | 596 | } ____cacheline_aligned_in_smp; |
bb949fbd | 597 | |
f2cd2d3e ED |
598 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
599 | { | |
600 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
601 | return q->numa_node; | |
602 | #else | |
b236da69 | 603 | return NUMA_NO_NODE; |
f2cd2d3e ED |
604 | #endif |
605 | } | |
606 | ||
607 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
608 | { | |
609 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
610 | q->numa_node = node; | |
611 | #endif | |
612 | } | |
613 | ||
df334545 | 614 | #ifdef CONFIG_RPS |
0a9627f2 TH |
615 | /* |
616 | * This structure holds an RPS map which can be of variable length. The | |
617 | * map is an array of CPUs. | |
618 | */ | |
619 | struct rps_map { | |
620 | unsigned int len; | |
621 | struct rcu_head rcu; | |
622 | u16 cpus[0]; | |
623 | }; | |
60b778ce | 624 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 625 | |
fec5e652 | 626 | /* |
c445477d BH |
627 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
628 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
629 | * a hardware filter index. | |
fec5e652 TH |
630 | */ |
631 | struct rps_dev_flow { | |
632 | u16 cpu; | |
c445477d | 633 | u16 filter; |
fec5e652 TH |
634 | unsigned int last_qtail; |
635 | }; | |
c445477d | 636 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
637 | |
638 | /* | |
639 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
640 | */ | |
641 | struct rps_dev_flow_table { | |
642 | unsigned int mask; | |
643 | struct rcu_head rcu; | |
fec5e652 TH |
644 | struct rps_dev_flow flows[0]; |
645 | }; | |
646 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 647 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
648 | |
649 | /* | |
650 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
651 | * on which they were processed by the application (set in recvmsg). | |
5e82b4b2 BH |
652 | * Each entry is a 32bit value. Upper part is the high-order bits |
653 | * of flow hash, lower part is CPU number. | |
567e4b79 | 654 | * rps_cpu_mask is used to partition the space, depending on number of |
5e82b4b2 BH |
655 | * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 |
656 | * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f, | |
567e4b79 | 657 | * meaning we use 32-6=26 bits for the hash. |
fec5e652 TH |
658 | */ |
659 | struct rps_sock_flow_table { | |
567e4b79 | 660 | u32 mask; |
93c1af6c ED |
661 | |
662 | u32 ents[0] ____cacheline_aligned_in_smp; | |
fec5e652 | 663 | }; |
567e4b79 | 664 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
fec5e652 TH |
665 | |
666 | #define RPS_NO_CPU 0xffff | |
667 | ||
567e4b79 ED |
668 | extern u32 rps_cpu_mask; |
669 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; | |
670 | ||
fec5e652 TH |
671 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
672 | u32 hash) | |
673 | { | |
674 | if (table && hash) { | |
567e4b79 ED |
675 | unsigned int index = hash & table->mask; |
676 | u32 val = hash & ~rps_cpu_mask; | |
fec5e652 | 677 | |
5e82b4b2 | 678 | /* We only give a hint, preemption can change CPU under us */ |
567e4b79 | 679 | val |= raw_smp_processor_id(); |
fec5e652 | 680 | |
567e4b79 ED |
681 | if (table->ents[index] != val) |
682 | table->ents[index] = val; | |
fec5e652 TH |
683 | } |
684 | } | |
685 | ||
c445477d | 686 | #ifdef CONFIG_RFS_ACCEL |
f629d208 JP |
687 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
688 | u16 filter_id); | |
c445477d | 689 | #endif |
a953be53 | 690 | #endif /* CONFIG_RPS */ |
c445477d | 691 | |
0a9627f2 TH |
692 | /* This structure contains an instance of an RX queue. */ |
693 | struct netdev_rx_queue { | |
a953be53 | 694 | #ifdef CONFIG_RPS |
6e3f7faf ED |
695 | struct rps_map __rcu *rps_map; |
696 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
a953be53 | 697 | #endif |
6e3f7faf | 698 | struct kobject kobj; |
fe822240 | 699 | struct net_device *dev; |
0a9627f2 | 700 | } ____cacheline_aligned_in_smp; |
a953be53 MD |
701 | |
702 | /* | |
703 | * RX queue sysfs structures and functions. | |
704 | */ | |
705 | struct rx_queue_attribute { | |
706 | struct attribute attr; | |
707 | ssize_t (*show)(struct netdev_rx_queue *queue, | |
708 | struct rx_queue_attribute *attr, char *buf); | |
709 | ssize_t (*store)(struct netdev_rx_queue *queue, | |
710 | struct rx_queue_attribute *attr, const char *buf, size_t len); | |
711 | }; | |
d314774c | 712 | |
bf264145 TH |
713 | #ifdef CONFIG_XPS |
714 | /* | |
715 | * This structure holds an XPS map which can be of variable length. The | |
716 | * map is an array of queues. | |
717 | */ | |
718 | struct xps_map { | |
719 | unsigned int len; | |
720 | unsigned int alloc_len; | |
721 | struct rcu_head rcu; | |
722 | u16 queues[0]; | |
723 | }; | |
60b778ce | 724 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
c59f419b HD |
725 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
726 | - sizeof(struct xps_map)) / sizeof(u16)) | |
bf264145 TH |
727 | |
728 | /* | |
729 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
730 | */ | |
731 | struct xps_dev_maps { | |
732 | struct rcu_head rcu; | |
a4177869 | 733 | struct xps_map __rcu *cpu_map[0]; |
bf264145 | 734 | }; |
184c449f AD |
735 | #define XPS_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ |
736 | (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) | |
bf264145 TH |
737 | #endif /* CONFIG_XPS */ |
738 | ||
4f57c087 JF |
739 | #define TC_MAX_QUEUE 16 |
740 | #define TC_BITMASK 15 | |
741 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
742 | struct netdev_tc_txq { | |
743 | u16 count; | |
744 | u16 offset; | |
745 | }; | |
746 | ||
68bad94e NP |
747 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
748 | /* | |
749 | * This structure is to hold information about the device | |
750 | * configured to run FCoE protocol stack. | |
751 | */ | |
752 | struct netdev_fcoe_hbainfo { | |
753 | char manufacturer[64]; | |
754 | char serial_number[64]; | |
755 | char hardware_version[64]; | |
756 | char driver_version[64]; | |
757 | char optionrom_version[64]; | |
758 | char firmware_version[64]; | |
759 | char model[256]; | |
760 | char model_description[256]; | |
761 | }; | |
762 | #endif | |
763 | ||
02637fce | 764 | #define MAX_PHYS_ITEM_ID_LEN 32 |
66b52b0d | 765 | |
02637fce JP |
766 | /* This structure holds a unique identifier to identify some |
767 | * physical item (port for example) used by a netdevice. | |
66b52b0d | 768 | */ |
02637fce JP |
769 | struct netdev_phys_item_id { |
770 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; | |
66b52b0d JP |
771 | unsigned char id_len; |
772 | }; | |
773 | ||
d754f98b SF |
774 | static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
775 | struct netdev_phys_item_id *b) | |
776 | { | |
777 | return a->id_len == b->id_len && | |
778 | memcmp(a->id, b->id, a->id_len) == 0; | |
779 | } | |
780 | ||
99932d4f DB |
781 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
782 | struct sk_buff *skb); | |
783 | ||
a1b7c5fd | 784 | /* These structures hold the attributes of qdisc and classifiers |
16e5cc64 JF |
785 | * that are being passed to the netdevice through the setup_tc op. |
786 | */ | |
787 | enum { | |
788 | TC_SETUP_MQPRIO, | |
a1b7c5fd | 789 | TC_SETUP_CLSU32, |
5b33f488 | 790 | TC_SETUP_CLSFLOWER, |
b87f7936 | 791 | TC_SETUP_MATCHALL, |
332ae8e2 | 792 | TC_SETUP_CLSBPF, |
16e5cc64 JF |
793 | }; |
794 | ||
a1b7c5fd JF |
795 | struct tc_cls_u32_offload; |
796 | ||
16e5cc64 JF |
797 | struct tc_to_netdev { |
798 | unsigned int type; | |
799 | union { | |
800 | u8 tc; | |
a1b7c5fd | 801 | struct tc_cls_u32_offload *cls_u32; |
5b33f488 | 802 | struct tc_cls_flower_offload *cls_flower; |
b87f7936 | 803 | struct tc_cls_matchall_offload *cls_mall; |
332ae8e2 | 804 | struct tc_cls_bpf_offload *cls_bpf; |
16e5cc64 | 805 | }; |
7091d8c7 | 806 | bool egress_dev; |
16e5cc64 JF |
807 | }; |
808 | ||
a7862b45 BB |
809 | /* These structures hold the attributes of xdp state that are being passed |
810 | * to the netdevice through the xdp op. | |
811 | */ | |
812 | enum xdp_netdev_command { | |
813 | /* Set or clear a bpf program used in the earliest stages of packet | |
814 | * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee | |
815 | * is responsible for calling bpf_prog_put on any old progs that are | |
816 | * stored. In case of error, the callee need not release the new prog | |
817 | * reference, but on success it takes ownership and must bpf_prog_put | |
818 | * when it is no longer used. | |
819 | */ | |
820 | XDP_SETUP_PROG, | |
821 | /* Check if a bpf program is set on the device. The callee should | |
822 | * return true if a program is currently attached and running. | |
823 | */ | |
824 | XDP_QUERY_PROG, | |
825 | }; | |
826 | ||
827 | struct netdev_xdp { | |
828 | enum xdp_netdev_command command; | |
829 | union { | |
830 | /* XDP_SETUP_PROG */ | |
831 | struct bpf_prog *prog; | |
832 | /* XDP_QUERY_PROG */ | |
833 | bool prog_attached; | |
834 | }; | |
835 | }; | |
16e5cc64 | 836 | |
d314774c SH |
837 | /* |
838 | * This structure defines the management hooks for network devices. | |
00829823 SH |
839 | * The following hooks can be defined; unless noted otherwise, they are |
840 | * optional and can be filled with a null pointer. | |
d314774c SH |
841 | * |
842 | * int (*ndo_init)(struct net_device *dev); | |
5e82b4b2 BH |
843 | * This function is called once when a network device is registered. |
844 | * The network device can use this for any late stage initialization | |
845 | * or semantic validation. It can fail with an error code which will | |
846 | * be propagated back to register_netdev. | |
d314774c SH |
847 | * |
848 | * void (*ndo_uninit)(struct net_device *dev); | |
849 | * This function is called when device is unregistered or when registration | |
850 | * fails. It is not called if init fails. | |
851 | * | |
852 | * int (*ndo_open)(struct net_device *dev); | |
5e82b4b2 | 853 | * This function is called when a network device transitions to the up |
d314774c SH |
854 | * state. |
855 | * | |
856 | * int (*ndo_stop)(struct net_device *dev); | |
5e82b4b2 | 857 | * This function is called when a network device transitions to the down |
d314774c SH |
858 | * state. |
859 | * | |
dc1f8bf6 SH |
860 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
861 | * struct net_device *dev); | |
00829823 | 862 | * Called when a packet needs to be transmitted. |
e79d8429 RR |
863 | * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
864 | * the queue before that can happen; it's for obsolete devices and weird | |
865 | * corner cases, but the stack really does a non-trivial amount | |
866 | * of useless work if you return NETDEV_TX_BUSY. | |
5e82b4b2 | 867 | * Required; cannot be NULL. |
00829823 | 868 | * |
cdba756f ED |
869 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
870 | * netdev_features_t features); | |
871 | * Adjusts the requested feature flags according to device-specific | |
872 | * constraints, and returns the resulting flags. Must not modify | |
873 | * the device state. | |
874 | * | |
f663dd9a | 875 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
99932d4f | 876 | * void *accel_priv, select_queue_fallback_t fallback); |
5e82b4b2 | 877 | * Called to decide which queue to use when device supports multiple |
00829823 SH |
878 | * transmit queues. |
879 | * | |
d314774c SH |
880 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
881 | * This function is called to allow device receiver to make | |
5e82b4b2 | 882 | * changes to configuration when multicast or promiscuous is enabled. |
d314774c SH |
883 | * |
884 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
885 | * This function is called device changes address list filtering. | |
01789349 | 886 | * If driver handles unicast address filtering, it should set |
5e82b4b2 | 887 | * IFF_UNICAST_FLT in its priv_flags. |
d314774c SH |
888 | * |
889 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
890 | * This function is called when the Media Access Control address | |
37b607c5 | 891 | * needs to be changed. If this interface is not defined, the |
5e82b4b2 | 892 | * MAC address can not be changed. |
d314774c SH |
893 | * |
894 | * int (*ndo_validate_addr)(struct net_device *dev); | |
895 | * Test if Media Access Control address is valid for the device. | |
896 | * | |
897 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
5e82b4b2 BH |
898 | * Called when a user requests an ioctl which can't be handled by |
899 | * the generic interface code. If not defined ioctls return | |
d314774c SH |
900 | * not supported error code. |
901 | * | |
902 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
903 | * Used to set network devices bus interface parameters. This interface | |
5e82b4b2 | 904 | * is retained for legacy reasons; new devices should use the bus |
d314774c SH |
905 | * interface (PCI) for low level management. |
906 | * | |
907 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
908 | * Called when a user wants to change the Maximum Transfer Unit | |
909 | * of a device. If not defined, any request to change MTU will | |
910 | * will return an error. | |
911 | * | |
00829823 | 912 | * void (*ndo_tx_timeout)(struct net_device *dev); |
5e82b4b2 | 913 | * Callback used when the transmitter has not made any progress |
d314774c SH |
914 | * for dev->watchdog ticks. |
915 | * | |
bc1f4470 | 916 | * void (*ndo_get_stats64)(struct net_device *dev, |
917 | * struct rtnl_link_stats64 *storage); | |
d308e38f | 918 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 919 | * Called when a user wants to get the network device usage |
be1f3c2c | 920 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
921 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
922 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 923 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
924 | * (which should normally be dev->stats) and return a pointer to |
925 | * it. The structure may be changed asynchronously only if each | |
926 | * field is written atomically. | |
927 | * 3. Update dev->stats asynchronously and atomically, and define | |
928 | * neither operation. | |
d314774c | 929 | * |
3df5b3c6 | 930 | * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) |
2c9d85d4 NF |
931 | * Return true if this device supports offload stats of this attr_id. |
932 | * | |
933 | * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, | |
934 | * void *attr_data) | |
935 | * Get statistics for offload operations by attr_id. Write it into the | |
936 | * attr_data pointer. | |
937 | * | |
5d632cb7 | 938 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 939 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 940 | * VLAN id is registered. |
d314774c | 941 | * |
5d632cb7 | 942 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
5e82b4b2 | 943 | * If device supports VLAN filtering this function is called when a |
80d5c368 | 944 | * VLAN id is unregistered. |
d314774c SH |
945 | * |
946 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
947 | * |
948 | * SR-IOV management functions. | |
949 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
79aab093 MS |
950 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, |
951 | * u8 qos, __be16 proto); | |
ed616689 SC |
952 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
953 | * int max_tx_rate); | |
5f8444a3 | 954 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
dd461d6a | 955 | * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
956 | * int (*ndo_get_vf_config)(struct net_device *dev, |
957 | * int vf, struct ifla_vf_info *ivf); | |
1d8faf48 | 958 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
57b61080 SF |
959 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
960 | * struct nlattr *port[]); | |
01a3d796 VZ |
961 | * |
962 | * Enable or disable the VF ability to query its RSS Redirection Table and | |
963 | * Hash Key. This is needed since on some devices VF share this information | |
5e82b4b2 | 964 | * with PF and querying it may introduce a theoretical security risk. |
01a3d796 | 965 | * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
57b61080 | 966 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
4f57c087 JF |
967 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
968 | * Called to setup 'tc' number of traffic classes in the net device. This | |
969 | * is always called from the stack with the rtnl lock held and netif tx | |
970 | * queues stopped. This allows the netdevice to perform queue management | |
971 | * safely. | |
c445477d | 972 | * |
e9bce845 YZ |
973 | * Fiber Channel over Ethernet (FCoE) offload functions. |
974 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
975 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
976 | * so the underlying device can perform whatever needed configuration or | |
977 | * initialization to support acceleration of FCoE traffic. | |
978 | * | |
979 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
980 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
981 | * so the underlying device can perform whatever needed clean-ups to | |
982 | * stop supporting acceleration of FCoE traffic. | |
983 | * | |
984 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
985 | * struct scatterlist *sgl, unsigned int sgc); | |
986 | * Called when the FCoE Initiator wants to initialize an I/O that | |
987 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
988 | * perform necessary setup and returns 1 to indicate the device is set up | |
989 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
990 | * | |
991 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
992 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
993 | * indicated by the FC exchange id 'xid', so the underlying device can | |
994 | * clean up and reuse resources for later DDP requests. | |
995 | * | |
996 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
997 | * struct scatterlist *sgl, unsigned int sgc); | |
998 | * Called when the FCoE Target wants to initialize an I/O that | |
999 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
1000 | * perform necessary setup and returns 1 to indicate the device is set up | |
1001 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
1002 | * | |
68bad94e NP |
1003 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1004 | * struct netdev_fcoe_hbainfo *hbainfo); | |
1005 | * Called when the FCoE Protocol stack wants information on the underlying | |
1006 | * device. This information is utilized by the FCoE protocol stack to | |
1007 | * register attributes with Fiber Channel management service as per the | |
1008 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
1009 | * | |
e9bce845 YZ |
1010 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
1011 | * Called when the underlying device wants to override default World Wide | |
1012 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
1013 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
1014 | * protocol stack to use. | |
1015 | * | |
c445477d BH |
1016 | * RFS acceleration. |
1017 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
1018 | * u16 rxq_index, u32 flow_id); | |
1019 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
1020 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
1021 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea | 1022 | * |
8b98a70c | 1023 | * Slave management functions (for bridge, bonding, etc). |
fbaec0ea JP |
1024 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
1025 | * Called to make another netdev an underling. | |
1026 | * | |
1027 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
1028 | * Called to release previously enslaved netdev. | |
5455c699 MM |
1029 | * |
1030 | * Feature/offload setting functions. | |
c8f44aff | 1031 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
1032 | * Called to update device configuration to new features. Passed |
1033 | * feature set might be less than what was returned by ndo_fix_features()). | |
1034 | * Must return >0 or -errno if it changed dev->features itself. | |
1035 | * | |
edc7d573 | 1036 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
1037 | * struct net_device *dev, | |
f6f6424b | 1038 | * const unsigned char *addr, u16 vid, u16 flags) |
77162022 | 1039 | * Adds an FDB entry to dev for addr. |
1690be63 VY |
1040 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
1041 | * struct net_device *dev, | |
f6f6424b | 1042 | * const unsigned char *addr, u16 vid) |
77162022 JF |
1043 | * Deletes the FDB entry from dev coresponding to addr. |
1044 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
5d5eacb3 | 1045 | * struct net_device *dev, struct net_device *filter_dev, |
d297653d | 1046 | * int *idx) |
77162022 JF |
1047 | * Used to add FDB entries to dump requests. Implementers should add |
1048 | * entries to skb and update idx with the number of entries. | |
e5a55a89 | 1049 | * |
ad41faa8 ND |
1050 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
1051 | * u16 flags) | |
e5a55a89 | 1052 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
46c264da ND |
1053 | * struct net_device *dev, u32 filter_mask, |
1054 | * int nlflags) | |
ad41faa8 ND |
1055 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
1056 | * u16 flags); | |
4bf84c35 JP |
1057 | * |
1058 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); | |
1059 | * Called to change device carrier. Soft-devices (like dummy, team, etc) | |
1060 | * which do not represent real hardware may define this to allow their | |
1061 | * userspace components to manage their virtual carrier state. Devices | |
1062 | * that determine carrier state from physical hardware properties (eg | |
1063 | * network cables) or protocol-dependent mechanisms (eg | |
1064 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. | |
66b52b0d JP |
1065 | * |
1066 | * int (*ndo_get_phys_port_id)(struct net_device *dev, | |
02637fce | 1067 | * struct netdev_phys_item_id *ppid); |
66b52b0d JP |
1068 | * Called to get ID of physical port of this device. If driver does |
1069 | * not implement this, it is assumed that the hw is not able to have | |
1070 | * multiple net devices on single physical port. | |
53cf5275 | 1071 | * |
7c46a640 AD |
1072 | * void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1073 | * struct udp_tunnel_info *ti); | |
1074 | * Called by UDP tunnel to notify a driver about the UDP port and socket | |
1075 | * address family that a UDP tunnel is listnening to. It is called only | |
1076 | * when a new port starts listening. The operation is protected by the | |
1077 | * RTNL. | |
1078 | * | |
1079 | * void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1080 | * struct udp_tunnel_info *ti); | |
1081 | * Called by UDP tunnel to notify the driver about a UDP port and socket | |
1082 | * address family that the UDP tunnel is not listening to anymore. The | |
1083 | * operation is protected by the RTNL. | |
1084 | * | |
a6cc0cfa JF |
1085 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1086 | * struct net_device *dev) | |
1087 | * Called by upper layer devices to accelerate switching or other | |
1088 | * station functionality into hardware. 'pdev is the lowerdev | |
1089 | * to use for the offload and 'dev' is the net device that will | |
1090 | * back the offload. Returns a pointer to the private structure | |
1091 | * the upper layer will maintain. | |
1092 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) | |
1093 | * Called by upper layer device to delete the station created | |
1094 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing | |
1095 | * the station and priv is the structure returned by the add | |
1096 | * operation. | |
1097 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, | |
1098 | * struct net_device *dev, | |
1099 | * void *priv); | |
1100 | * Callback to use for xmit over the accelerated station. This | |
1101 | * is used in place of ndo_start_xmit on accelerated net | |
1102 | * devices. | |
5e82b4b2 BH |
1103 | * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
1104 | * struct net_device *dev | |
1105 | * netdev_features_t features); | |
04ffcb25 | 1106 | * Called by core transmit path to determine if device is capable of |
5f35227e JG |
1107 | * performing offload operations on a given packet. This is to give |
1108 | * the device an opportunity to implement any restrictions that cannot | |
1109 | * be otherwise expressed by feature flags. The check is called with | |
1110 | * the set of features that the stack has calculated and it returns | |
1111 | * those the driver believes to be appropriate. | |
822b3b2e JF |
1112 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1113 | * int queue_index, u32 maxrate); | |
1114 | * Called when a user wants to set a max-rate limitation of specific | |
1115 | * TX queue. | |
a54acb3a ND |
1116 | * int (*ndo_get_iflink)(const struct net_device *dev); |
1117 | * Called to get the iflink value of this device. | |
d746d707 | 1118 | * void (*ndo_change_proto_down)(struct net_device *dev, |
5e82b4b2 | 1119 | * bool proto_down); |
d746d707 AK |
1120 | * This function is used to pass protocol port error state information |
1121 | * to the switch driver. The switch driver can react to the proto_down | |
1122 | * by doing a phys down on the associated switch port. | |
fc4099f1 PS |
1123 | * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
1124 | * This function is used to get egress tunnel information for given skb. | |
1125 | * This is useful for retrieving outer tunnel header parameters while | |
1126 | * sampling packet. | |
871b642a PA |
1127 | * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
1128 | * This function is used to specify the headroom that the skb must | |
1129 | * consider when allocation skb during packet reception. Setting | |
1130 | * appropriate rx headroom value allows avoiding skb head copy on | |
5e82b4b2 | 1131 | * forward. Setting a negative value resets the rx headroom to the |
871b642a | 1132 | * default value. |
a7862b45 BB |
1133 | * int (*ndo_xdp)(struct net_device *dev, struct netdev_xdp *xdp); |
1134 | * This function is used to set or query state related to XDP on the | |
1135 | * netdevice. See definition of enum xdp_netdev_command for details. | |
d746d707 | 1136 | * |
d314774c SH |
1137 | */ |
1138 | struct net_device_ops { | |
1139 | int (*ndo_init)(struct net_device *dev); | |
1140 | void (*ndo_uninit)(struct net_device *dev); | |
1141 | int (*ndo_open)(struct net_device *dev); | |
1142 | int (*ndo_stop)(struct net_device *dev); | |
cdba756f ED |
1143 | netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1144 | struct net_device *dev); | |
1145 | netdev_features_t (*ndo_features_check)(struct sk_buff *skb, | |
1146 | struct net_device *dev, | |
1147 | netdev_features_t features); | |
00829823 | 1148 | u16 (*ndo_select_queue)(struct net_device *dev, |
f663dd9a | 1149 | struct sk_buff *skb, |
99932d4f DB |
1150 | void *accel_priv, |
1151 | select_queue_fallback_t fallback); | |
d314774c SH |
1152 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1153 | int flags); | |
d314774c | 1154 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
1155 | int (*ndo_set_mac_address)(struct net_device *dev, |
1156 | void *addr); | |
d314774c | 1157 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
1158 | int (*ndo_do_ioctl)(struct net_device *dev, |
1159 | struct ifreq *ifr, int cmd); | |
d314774c SH |
1160 | int (*ndo_set_config)(struct net_device *dev, |
1161 | struct ifmap *map); | |
00829823 SH |
1162 | int (*ndo_change_mtu)(struct net_device *dev, |
1163 | int new_mtu); | |
1164 | int (*ndo_neigh_setup)(struct net_device *dev, | |
1165 | struct neigh_parms *); | |
d314774c SH |
1166 | void (*ndo_tx_timeout) (struct net_device *dev); |
1167 | ||
bc1f4470 | 1168 | void (*ndo_get_stats64)(struct net_device *dev, |
1169 | struct rtnl_link_stats64 *storage); | |
3df5b3c6 | 1170 | bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); |
2c9d85d4 NF |
1171 | int (*ndo_get_offload_stats)(int attr_id, |
1172 | const struct net_device *dev, | |
1173 | void *attr_data); | |
d314774c SH |
1174 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1175 | ||
8e586137 | 1176 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
80d5c368 | 1177 | __be16 proto, u16 vid); |
8e586137 | 1178 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
80d5c368 | 1179 | __be16 proto, u16 vid); |
d314774c | 1180 | #ifdef CONFIG_NET_POLL_CONTROLLER |
d314774c | 1181 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 | 1182 | int (*ndo_netpoll_setup)(struct net_device *dev, |
a8779ec1 | 1183 | struct netpoll_info *info); |
0e34e931 | 1184 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
06021292 | 1185 | #endif |
e0d1095a | 1186 | #ifdef CONFIG_NET_RX_BUSY_POLL |
8b80cda5 | 1187 | int (*ndo_busy_poll)(struct napi_struct *dev); |
d314774c | 1188 | #endif |
95c26df8 WM |
1189 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1190 | int queue, u8 *mac); | |
1191 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
79aab093 MS |
1192 | int queue, u16 vlan, |
1193 | u8 qos, __be16 proto); | |
ed616689 SC |
1194 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1195 | int vf, int min_tx_rate, | |
1196 | int max_tx_rate); | |
5f8444a3 GR |
1197 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1198 | int vf, bool setting); | |
dd461d6a HS |
1199 | int (*ndo_set_vf_trust)(struct net_device *dev, |
1200 | int vf, bool setting); | |
95c26df8 WM |
1201 | int (*ndo_get_vf_config)(struct net_device *dev, |
1202 | int vf, | |
1203 | struct ifla_vf_info *ivf); | |
1d8faf48 RE |
1204 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1205 | int vf, int link_state); | |
3b766cd8 EBE |
1206 | int (*ndo_get_vf_stats)(struct net_device *dev, |
1207 | int vf, | |
1208 | struct ifla_vf_stats | |
1209 | *vf_stats); | |
57b61080 SF |
1210 | int (*ndo_set_vf_port)(struct net_device *dev, |
1211 | int vf, | |
1212 | struct nlattr *port[]); | |
1213 | int (*ndo_get_vf_port)(struct net_device *dev, | |
1214 | int vf, struct sk_buff *skb); | |
cc8e27cc EC |
1215 | int (*ndo_set_vf_guid)(struct net_device *dev, |
1216 | int vf, u64 guid, | |
1217 | int guid_type); | |
01a3d796 VZ |
1218 | int (*ndo_set_vf_rss_query_en)( |
1219 | struct net_device *dev, | |
1220 | int vf, bool setting); | |
16e5cc64 JF |
1221 | int (*ndo_setup_tc)(struct net_device *dev, |
1222 | u32 handle, | |
1223 | __be16 protocol, | |
1224 | struct tc_to_netdev *tc); | |
d11ead75 | 1225 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
1226 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1227 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
1228 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1229 | u16 xid, | |
1230 | struct scatterlist *sgl, | |
1231 | unsigned int sgc); | |
1232 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
1233 | u16 xid); | |
6247e086 YZ |
1234 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1235 | u16 xid, | |
1236 | struct scatterlist *sgl, | |
1237 | unsigned int sgc); | |
68bad94e NP |
1238 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1239 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
1240 | #endif |
1241 | ||
d11ead75 | 1242 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
1243 | #define NETDEV_FCOE_WWNN 0 |
1244 | #define NETDEV_FCOE_WWPN 1 | |
1245 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
1246 | u64 *wwn, int type); | |
4d288d57 | 1247 | #endif |
3c9c36bc | 1248 | |
c445477d BH |
1249 | #ifdef CONFIG_RFS_ACCEL |
1250 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1251 | const struct sk_buff *skb, | |
1252 | u16 rxq_index, | |
1253 | u32 flow_id); | |
1254 | #endif | |
fbaec0ea JP |
1255 | int (*ndo_add_slave)(struct net_device *dev, |
1256 | struct net_device *slave_dev); | |
1257 | int (*ndo_del_slave)(struct net_device *dev, | |
1258 | struct net_device *slave_dev); | |
c8f44aff MM |
1259 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1260 | netdev_features_t features); | |
5455c699 | 1261 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1262 | netdev_features_t features); |
503eebc2 JP |
1263 | int (*ndo_neigh_construct)(struct net_device *dev, |
1264 | struct neighbour *n); | |
1265 | void (*ndo_neigh_destroy)(struct net_device *dev, | |
1266 | struct neighbour *n); | |
77162022 JF |
1267 | |
1268 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
edc7d573 | 1269 | struct nlattr *tb[], |
77162022 | 1270 | struct net_device *dev, |
6b6e2725 | 1271 | const unsigned char *addr, |
f6f6424b | 1272 | u16 vid, |
77162022 JF |
1273 | u16 flags); |
1274 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1690be63 | 1275 | struct nlattr *tb[], |
77162022 | 1276 | struct net_device *dev, |
f6f6424b JP |
1277 | const unsigned char *addr, |
1278 | u16 vid); | |
77162022 JF |
1279 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1280 | struct netlink_callback *cb, | |
1281 | struct net_device *dev, | |
5d5eacb3 | 1282 | struct net_device *filter_dev, |
d297653d | 1283 | int *idx); |
e5a55a89 JF |
1284 | |
1285 | int (*ndo_bridge_setlink)(struct net_device *dev, | |
add511b3 RP |
1286 | struct nlmsghdr *nlh, |
1287 | u16 flags); | |
e5a55a89 JF |
1288 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1289 | u32 pid, u32 seq, | |
6cbdceeb | 1290 | struct net_device *dev, |
46c264da ND |
1291 | u32 filter_mask, |
1292 | int nlflags); | |
407af329 | 1293 | int (*ndo_bridge_dellink)(struct net_device *dev, |
add511b3 RP |
1294 | struct nlmsghdr *nlh, |
1295 | u16 flags); | |
4bf84c35 JP |
1296 | int (*ndo_change_carrier)(struct net_device *dev, |
1297 | bool new_carrier); | |
66b52b0d | 1298 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
02637fce | 1299 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
1300 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1301 | char *name, size_t len); | |
7c46a640 AD |
1302 | void (*ndo_udp_tunnel_add)(struct net_device *dev, |
1303 | struct udp_tunnel_info *ti); | |
1304 | void (*ndo_udp_tunnel_del)(struct net_device *dev, | |
1305 | struct udp_tunnel_info *ti); | |
a6cc0cfa JF |
1306 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1307 | struct net_device *dev); | |
1308 | void (*ndo_dfwd_del_station)(struct net_device *pdev, | |
1309 | void *priv); | |
1310 | ||
1311 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, | |
1312 | struct net_device *dev, | |
1313 | void *priv); | |
25175ba5 | 1314 | int (*ndo_get_lock_subclass)(struct net_device *dev); |
822b3b2e JF |
1315 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1316 | int queue_index, | |
1317 | u32 maxrate); | |
a54acb3a | 1318 | int (*ndo_get_iflink)(const struct net_device *dev); |
d746d707 AK |
1319 | int (*ndo_change_proto_down)(struct net_device *dev, |
1320 | bool proto_down); | |
fc4099f1 PS |
1321 | int (*ndo_fill_metadata_dst)(struct net_device *dev, |
1322 | struct sk_buff *skb); | |
871b642a PA |
1323 | void (*ndo_set_rx_headroom)(struct net_device *dev, |
1324 | int needed_headroom); | |
a7862b45 BB |
1325 | int (*ndo_xdp)(struct net_device *dev, |
1326 | struct netdev_xdp *xdp); | |
d314774c SH |
1327 | }; |
1328 | ||
7aa98047 LR |
1329 | /** |
1330 | * enum net_device_priv_flags - &struct net_device priv_flags | |
1331 | * | |
1332 | * These are the &struct net_device, they are only set internally | |
1333 | * by drivers and used in the kernel. These flags are invisible to | |
5e82b4b2 | 1334 | * userspace; this means that the order of these flags can change |
7aa98047 LR |
1335 | * during any kernel release. |
1336 | * | |
1337 | * You should have a pretty good reason to be extending these flags. | |
1338 | * | |
1339 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device | |
1340 | * @IFF_EBRIDGE: Ethernet bridging device | |
7aa98047 | 1341 | * @IFF_BONDING: bonding master or slave |
7aa98047 | 1342 | * @IFF_ISATAP: ISATAP interface (RFC4214) |
7aa98047 LR |
1343 | * @IFF_WAN_HDLC: WAN HDLC device |
1344 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to | |
1345 | * release skb->dst | |
1346 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev | |
1347 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time | |
1348 | * @IFF_MACVLAN_PORT: device used as macvlan port | |
1349 | * @IFF_BRIDGE_PORT: device used as bridge port | |
1350 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port | |
1351 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit | |
1352 | * @IFF_UNICAST_FLT: Supports unicast filtering | |
1353 | * @IFF_TEAM_PORT: device used as team port | |
1354 | * @IFF_SUPP_NOFCS: device supports sending custom FCS | |
1355 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address | |
1356 | * change when it's running | |
1357 | * @IFF_MACVLAN: Macvlan device | |
6d0e24cd LB |
1358 | * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
1359 | * underlying stacked devices | |
1360 | * @IFF_IPVLAN_MASTER: IPvlan master device | |
1361 | * @IFF_IPVLAN_SLAVE: IPvlan slave device | |
007979ea | 1362 | * @IFF_L3MDEV_MASTER: device is an L3 master device |
fa8187c9 | 1363 | * @IFF_NO_QUEUE: device can run without qdisc attached |
35d4e172 | 1364 | * @IFF_OPENVSWITCH: device is a Open vSwitch master |
fee6d4c7 | 1365 | * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
c981e421 | 1366 | * @IFF_TEAM: device is a team device |
d4ab4286 | 1367 | * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
871b642a PA |
1368 | * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
1369 | * entity (i.e. the master device for bridged veth) | |
3c175784 | 1370 | * @IFF_MACSEC: device is a MACsec device |
7aa98047 LR |
1371 | */ |
1372 | enum netdev_priv_flags { | |
1373 | IFF_802_1Q_VLAN = 1<<0, | |
1374 | IFF_EBRIDGE = 1<<1, | |
0dc1549b JP |
1375 | IFF_BONDING = 1<<2, |
1376 | IFF_ISATAP = 1<<3, | |
1377 | IFF_WAN_HDLC = 1<<4, | |
1378 | IFF_XMIT_DST_RELEASE = 1<<5, | |
1379 | IFF_DONT_BRIDGE = 1<<6, | |
1380 | IFF_DISABLE_NETPOLL = 1<<7, | |
1381 | IFF_MACVLAN_PORT = 1<<8, | |
1382 | IFF_BRIDGE_PORT = 1<<9, | |
1383 | IFF_OVS_DATAPATH = 1<<10, | |
1384 | IFF_TX_SKB_SHARING = 1<<11, | |
1385 | IFF_UNICAST_FLT = 1<<12, | |
1386 | IFF_TEAM_PORT = 1<<13, | |
1387 | IFF_SUPP_NOFCS = 1<<14, | |
1388 | IFF_LIVE_ADDR_CHANGE = 1<<15, | |
1389 | IFF_MACVLAN = 1<<16, | |
1390 | IFF_XMIT_DST_RELEASE_PERM = 1<<17, | |
1391 | IFF_IPVLAN_MASTER = 1<<18, | |
1392 | IFF_IPVLAN_SLAVE = 1<<19, | |
007979ea | 1393 | IFF_L3MDEV_MASTER = 1<<20, |
0dc1549b JP |
1394 | IFF_NO_QUEUE = 1<<21, |
1395 | IFF_OPENVSWITCH = 1<<22, | |
fee6d4c7 | 1396 | IFF_L3MDEV_SLAVE = 1<<23, |
c981e421 | 1397 | IFF_TEAM = 1<<24, |
d4ab4286 | 1398 | IFF_RXFH_CONFIGURED = 1<<25, |
871b642a | 1399 | IFF_PHONY_HEADROOM = 1<<26, |
3c175784 | 1400 | IFF_MACSEC = 1<<27, |
7aa98047 LR |
1401 | }; |
1402 | ||
1403 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN | |
1404 | #define IFF_EBRIDGE IFF_EBRIDGE | |
7aa98047 | 1405 | #define IFF_BONDING IFF_BONDING |
7aa98047 | 1406 | #define IFF_ISATAP IFF_ISATAP |
7aa98047 LR |
1407 | #define IFF_WAN_HDLC IFF_WAN_HDLC |
1408 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE | |
1409 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE | |
1410 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL | |
1411 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT | |
1412 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT | |
1413 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH | |
1414 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING | |
1415 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT | |
1416 | #define IFF_TEAM_PORT IFF_TEAM_PORT | |
1417 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS | |
1418 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE | |
1419 | #define IFF_MACVLAN IFF_MACVLAN | |
02875878 | 1420 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
2ad7bf36 MB |
1421 | #define IFF_IPVLAN_MASTER IFF_IPVLAN_MASTER |
1422 | #define IFF_IPVLAN_SLAVE IFF_IPVLAN_SLAVE | |
007979ea | 1423 | #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
fa8187c9 | 1424 | #define IFF_NO_QUEUE IFF_NO_QUEUE |
35d4e172 | 1425 | #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
8f25348b | 1426 | #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
c981e421 | 1427 | #define IFF_TEAM IFF_TEAM |
d4ab4286 | 1428 | #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
3c175784 | 1429 | #define IFF_MACSEC IFF_MACSEC |
7aa98047 | 1430 | |
536721b1 KK |
1431 | /** |
1432 | * struct net_device - The DEVICE structure. | |
1433 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1434 | * data with strictly "high-level" data, and it has to know about | |
1435 | * almost every data structure used in the INET module. | |
1436 | * | |
1437 | * @name: This is the first field of the "visible" part of this structure | |
1438 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
1439 | * of the interface. | |
1440 | * | |
1441 | * @name_hlist: Device name hash chain, please keep it close to name[] | |
1442 | * @ifalias: SNMP alias | |
1443 | * @mem_end: Shared memory end | |
1444 | * @mem_start: Shared memory start | |
1445 | * @base_addr: Device I/O address | |
1446 | * @irq: Device IRQ number | |
1447 | * | |
14ffbbb8 TG |
1448 | * @carrier_changes: Stats to monitor carrier on<->off transitions |
1449 | * | |
536721b1 KK |
1450 | * @state: Generic network queuing layer state, see netdev_state_t |
1451 | * @dev_list: The global list of network devices | |
5e82b4b2 BH |
1452 | * @napi_list: List entry used for polling NAPI devices |
1453 | * @unreg_list: List entry when we are unregistering the | |
1454 | * device; see the function unregister_netdev | |
1455 | * @close_list: List entry used when we are closing the device | |
62d885fe BP |
1456 | * @ptype_all: Device-specific packet handlers for all protocols |
1457 | * @ptype_specific: Device-specific, protocol-specific packet handlers | |
536721b1 KK |
1458 | * |
1459 | * @adj_list: Directly linked devices, like slaves for bonding | |
536721b1 KK |
1460 | * @features: Currently active device features |
1461 | * @hw_features: User-changeable features | |
1462 | * | |
1463 | * @wanted_features: User-requested features | |
1464 | * @vlan_features: Mask of features inheritable by VLAN devices | |
1465 | * | |
1466 | * @hw_enc_features: Mask of features inherited by encapsulating devices | |
1467 | * This field indicates what encapsulation | |
1468 | * offloads the hardware is capable of doing, | |
1469 | * and drivers will need to set them appropriately. | |
1470 | * | |
1471 | * @mpls_features: Mask of features inheritable by MPLS | |
1472 | * | |
1473 | * @ifindex: interface index | |
5e82b4b2 | 1474 | * @group: The group the device belongs to |
536721b1 KK |
1475 | * |
1476 | * @stats: Statistics struct, which was left as a legacy, use | |
1477 | * rtnl_link_stats64 instead | |
1478 | * | |
1479 | * @rx_dropped: Dropped packets by core network, | |
1480 | * do not use this in drivers | |
1481 | * @tx_dropped: Dropped packets by core network, | |
1482 | * do not use this in drivers | |
6e7333d3 JW |
1483 | * @rx_nohandler: nohandler dropped packets by core network on |
1484 | * inactive devices, do not use this in drivers | |
536721b1 | 1485 | * |
536721b1 KK |
1486 | * @wireless_handlers: List of functions to handle Wireless Extensions, |
1487 | * instead of ioctl, | |
1488 | * see <net/iw_handler.h> for details. | |
1489 | * @wireless_data: Instance data managed by the core of wireless extensions | |
1490 | * | |
1491 | * @netdev_ops: Includes several pointers to callbacks, | |
1492 | * if one wants to override the ndo_*() functions | |
1493 | * @ethtool_ops: Management operations | |
f997c55c AA |
1494 | * @ndisc_ops: Includes callbacks for different IPv6 neighbour |
1495 | * discovery handling. Necessary for e.g. 6LoWPAN. | |
d476059e | 1496 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
536721b1 KK |
1497 | * of Layer 2 headers. |
1498 | * | |
1499 | * @flags: Interface flags (a la BSD) | |
1500 | * @priv_flags: Like 'flags' but invisible to userspace, | |
1501 | * see if.h for the definitions | |
1502 | * @gflags: Global flags ( kept as legacy ) | |
1503 | * @padded: How much padding added by alloc_netdev() | |
1504 | * @operstate: RFC2863 operstate | |
1505 | * @link_mode: Mapping policy to operstate | |
1506 | * @if_port: Selectable AUI, TP, ... | |
1507 | * @dma: DMA channel | |
1508 | * @mtu: Interface MTU value | |
61e84623 JW |
1509 | * @min_mtu: Interface Minimum MTU value |
1510 | * @max_mtu: Interface Maximum MTU value | |
536721b1 | 1511 | * @type: Interface hardware type |
2793a23a | 1512 | * @hard_header_len: Maximum hardware header length. |
536721b1 KK |
1513 | * |
1514 | * @needed_headroom: Extra headroom the hardware may need, but not in all | |
1515 | * cases can this be guaranteed | |
1516 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all | |
1517 | * cases can this be guaranteed. Some cases also use | |
1518 | * LL_MAX_HEADER instead to allocate the skb | |
1519 | * | |
1520 | * interface address info: | |
1521 | * | |
1522 | * @perm_addr: Permanent hw address | |
1523 | * @addr_assign_type: Hw address assignment type | |
1524 | * @addr_len: Hardware address length | |
8626a0c8 | 1525 | * @neigh_priv_len: Used in neigh_alloc() |
536721b1 KK |
1526 | * @dev_id: Used to differentiate devices that share |
1527 | * the same link layer address | |
1528 | * @dev_port: Used to differentiate devices that share | |
1529 | * the same function | |
1530 | * @addr_list_lock: XXX: need comments on this one | |
5e82b4b2 | 1531 | * @uc_promisc: Counter that indicates promiscuous mode |
536721b1 KK |
1532 | * has been enabled due to the need to listen to |
1533 | * additional unicast addresses in a device that | |
1534 | * does not implement ndo_set_rx_mode() | |
14ffbbb8 TG |
1535 | * @uc: unicast mac addresses |
1536 | * @mc: multicast mac addresses | |
1537 | * @dev_addrs: list of device hw addresses | |
1538 | * @queues_kset: Group of all Kobjects in the Tx and RX queues | |
5e82b4b2 BH |
1539 | * @promiscuity: Number of times the NIC is told to work in |
1540 | * promiscuous mode; if it becomes 0 the NIC will | |
1541 | * exit promiscuous mode | |
536721b1 KK |
1542 | * @allmulti: Counter, enables or disables allmulticast mode |
1543 | * | |
1544 | * @vlan_info: VLAN info | |
1545 | * @dsa_ptr: dsa specific data | |
1546 | * @tipc_ptr: TIPC specific data | |
1547 | * @atalk_ptr: AppleTalk link | |
1548 | * @ip_ptr: IPv4 specific data | |
1549 | * @dn_ptr: DECnet specific data | |
1550 | * @ip6_ptr: IPv6 specific data | |
1551 | * @ax25_ptr: AX.25 specific data | |
1552 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering | |
1553 | * | |
536721b1 KK |
1554 | * @dev_addr: Hw address (before bcast, |
1555 | * because most packets are unicast) | |
1556 | * | |
1557 | * @_rx: Array of RX queues | |
1558 | * @num_rx_queues: Number of RX queues | |
1559 | * allocated at register_netdev() time | |
1560 | * @real_num_rx_queues: Number of RX queues currently active in device | |
1561 | * | |
1562 | * @rx_handler: handler for received packets | |
1563 | * @rx_handler_data: XXX: need comments on this one | |
1564 | * @ingress_queue: XXX: need comments on this one | |
1565 | * @broadcast: hw bcast address | |
1566 | * | |
14ffbbb8 TG |
1567 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, |
1568 | * indexed by RX queue number. Assigned by driver. | |
1569 | * This must only be set if the ndo_rx_flow_steer | |
1570 | * operation is defined | |
1571 | * @index_hlist: Device index hash chain | |
1572 | * | |
536721b1 KK |
1573 | * @_tx: Array of TX queues |
1574 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time | |
1575 | * @real_num_tx_queues: Number of TX queues currently active in device | |
1576 | * @qdisc: Root qdisc from userspace point of view | |
1577 | * @tx_queue_len: Max frames per queue allowed | |
1578 | * @tx_global_lock: XXX: need comments on this one | |
1579 | * | |
1580 | * @xps_maps: XXX: need comments on this one | |
1581 | * | |
536721b1 | 1582 | * @watchdog_timeo: Represents the timeout that is used by |
5e82b4b2 | 1583 | * the watchdog (see dev_watchdog()) |
536721b1 KK |
1584 | * @watchdog_timer: List of timers |
1585 | * | |
1586 | * @pcpu_refcnt: Number of references to this device | |
1587 | * @todo_list: Delayed register/unregister | |
536721b1 KK |
1588 | * @link_watch_list: XXX: need comments on this one |
1589 | * | |
1590 | * @reg_state: Register/unregister state machine | |
1591 | * @dismantle: Device is going to be freed | |
1592 | * @rtnl_link_state: This enum represents the phases of creating | |
1593 | * a new link | |
1594 | * | |
1595 | * @destructor: Called from unregister, | |
1596 | * can be used to call free_netdev | |
1597 | * @npinfo: XXX: need comments on this one | |
1598 | * @nd_net: Network namespace this network device is inside | |
1599 | * | |
1600 | * @ml_priv: Mid-layer private | |
1601 | * @lstats: Loopback statistics | |
1602 | * @tstats: Tunnel statistics | |
1603 | * @dstats: Dummy statistics | |
1604 | * @vstats: Virtual ethernet statistics | |
1605 | * | |
1606 | * @garp_port: GARP | |
1607 | * @mrp_port: MRP | |
1608 | * | |
1609 | * @dev: Class/net/name entry | |
1610 | * @sysfs_groups: Space for optional device, statistics and wireless | |
1611 | * sysfs groups | |
1612 | * | |
1613 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes | |
1614 | * @rtnl_link_ops: Rtnl_link_ops | |
1615 | * | |
1616 | * @gso_max_size: Maximum size of generic segmentation offload | |
1617 | * @gso_max_segs: Maximum number of segments that can be passed to the | |
1618 | * NIC for GSO | |
1619 | * | |
1620 | * @dcbnl_ops: Data Center Bridging netlink ops | |
1621 | * @num_tc: Number of traffic classes in the net device | |
1622 | * @tc_to_txq: XXX: need comments on this one | |
920c1cd3 | 1623 | * @prio_tc_map: XXX: need comments on this one |
536721b1 KK |
1624 | * |
1625 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp | |
1626 | * | |
1627 | * @priomap: XXX: need comments on this one | |
1628 | * @phydev: Physical device may attach itself | |
1629 | * for hardware timestamping | |
1630 | * | |
123b3652 ED |
1631 | * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock |
1632 | * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount | |
536721b1 | 1633 | * |
d746d707 AK |
1634 | * @proto_down: protocol port state information can be sent to the |
1635 | * switch driver and used to set the phys state of the | |
1636 | * switch port. | |
1637 | * | |
1da177e4 LT |
1638 | * FIXME: cleanup struct net_device such that network protocol info |
1639 | * moves out. | |
1640 | */ | |
1641 | ||
d94d9fee | 1642 | struct net_device { |
1da177e4 | 1643 | char name[IFNAMSIZ]; |
9356b8fc | 1644 | struct hlist_node name_hlist; |
0b815a1a | 1645 | char *ifalias; |
1da177e4 LT |
1646 | /* |
1647 | * I/O specific fields | |
1648 | * FIXME: Merge these and struct ifmap into one | |
1649 | */ | |
536721b1 KK |
1650 | unsigned long mem_end; |
1651 | unsigned long mem_start; | |
1652 | unsigned long base_addr; | |
1653 | int irq; | |
1da177e4 | 1654 | |
14ffbbb8 TG |
1655 | atomic_t carrier_changes; |
1656 | ||
1da177e4 | 1657 | /* |
536721b1 KK |
1658 | * Some hardware also needs these fields (state,dev_list, |
1659 | * napi_list,unreg_list,close_list) but they are not | |
1da177e4 LT |
1660 | * part of the usual set specified in Space.c. |
1661 | */ | |
1662 | ||
1da177e4 LT |
1663 | unsigned long state; |
1664 | ||
7562f876 | 1665 | struct list_head dev_list; |
bea3348e | 1666 | struct list_head napi_list; |
44a0873d | 1667 | struct list_head unreg_list; |
5cde2829 | 1668 | struct list_head close_list; |
7866a621 SN |
1669 | struct list_head ptype_all; |
1670 | struct list_head ptype_specific; | |
2f268f12 | 1671 | |
2f268f12 VF |
1672 | struct { |
1673 | struct list_head upper; | |
1674 | struct list_head lower; | |
1675 | } adj_list; | |
1676 | ||
c8f44aff | 1677 | netdev_features_t features; |
c8f44aff | 1678 | netdev_features_t hw_features; |
c8f44aff | 1679 | netdev_features_t wanted_features; |
c8f44aff | 1680 | netdev_features_t vlan_features; |
6a674e9c | 1681 | netdev_features_t hw_enc_features; |
0d89d203 | 1682 | netdev_features_t mpls_features; |
802ab55a | 1683 | netdev_features_t gso_partial_features; |
04ed3e74 | 1684 | |
1da177e4 | 1685 | int ifindex; |
7a66bbc9 | 1686 | int group; |
1da177e4 | 1687 | |
c45d286e | 1688 | struct net_device_stats stats; |
015f0688 | 1689 | |
015f0688 ED |
1690 | atomic_long_t rx_dropped; |
1691 | atomic_long_t tx_dropped; | |
6e7333d3 | 1692 | atomic_long_t rx_nohandler; |
1da177e4 | 1693 | |
b86e0280 | 1694 | #ifdef CONFIG_WIRELESS_EXT |
5e82b4b2 BH |
1695 | const struct iw_handler_def *wireless_handlers; |
1696 | struct iw_public_data *wireless_data; | |
b86e0280 | 1697 | #endif |
d314774c | 1698 | const struct net_device_ops *netdev_ops; |
76fd8593 | 1699 | const struct ethtool_ops *ethtool_ops; |
4170604f | 1700 | #ifdef CONFIG_NET_SWITCHDEV |
9d47c0a2 | 1701 | const struct switchdev_ops *switchdev_ops; |
4170604f | 1702 | #endif |
1b69c6d0 DA |
1703 | #ifdef CONFIG_NET_L3_MASTER_DEV |
1704 | const struct l3mdev_ops *l3mdev_ops; | |
1705 | #endif | |
f997c55c AA |
1706 | #if IS_ENABLED(CONFIG_IPV6) |
1707 | const struct ndisc_ops *ndisc_ops; | |
1708 | #endif | |
1da177e4 | 1709 | |
3b04ddde SH |
1710 | const struct header_ops *header_ops; |
1711 | ||
536721b1 KK |
1712 | unsigned int flags; |
1713 | unsigned int priv_flags; | |
1714 | ||
1da177e4 | 1715 | unsigned short gflags; |
536721b1 | 1716 | unsigned short padded; |
1da177e4 | 1717 | |
536721b1 KK |
1718 | unsigned char operstate; |
1719 | unsigned char link_mode; | |
b00055aa | 1720 | |
536721b1 KK |
1721 | unsigned char if_port; |
1722 | unsigned char dma; | |
bdc220da | 1723 | |
536721b1 | 1724 | unsigned int mtu; |
61e84623 JW |
1725 | unsigned int min_mtu; |
1726 | unsigned int max_mtu; | |
536721b1 KK |
1727 | unsigned short type; |
1728 | unsigned short hard_header_len; | |
1da177e4 | 1729 | |
f5184d26 JB |
1730 | unsigned short needed_headroom; |
1731 | unsigned short needed_tailroom; | |
1732 | ||
1da177e4 | 1733 | /* Interface address info. */ |
536721b1 KK |
1734 | unsigned char perm_addr[MAX_ADDR_LEN]; |
1735 | unsigned char addr_assign_type; | |
1736 | unsigned char addr_len; | |
a0a9663d | 1737 | unsigned short neigh_priv_len; |
536721b1 KK |
1738 | unsigned short dev_id; |
1739 | unsigned short dev_port; | |
ccffad25 | 1740 | spinlock_t addr_list_lock; |
14ffbbb8 TG |
1741 | unsigned char name_assign_type; |
1742 | bool uc_promisc; | |
536721b1 KK |
1743 | struct netdev_hw_addr_list uc; |
1744 | struct netdev_hw_addr_list mc; | |
1745 | struct netdev_hw_addr_list dev_addrs; | |
1746 | ||
4c3d5e7b ED |
1747 | #ifdef CONFIG_SYSFS |
1748 | struct kset *queues_kset; | |
1749 | #endif | |
9d45abe1 WC |
1750 | unsigned int promiscuity; |
1751 | unsigned int allmulti; | |
1da177e4 | 1752 | |
1da177e4 | 1753 | |
5e82b4b2 | 1754 | /* Protocol-specific pointers */ |
65ac6a5f | 1755 | |
d11ead75 | 1756 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
536721b1 | 1757 | struct vlan_info __rcu *vlan_info; |
65ac6a5f | 1758 | #endif |
34a430d7 | 1759 | #if IS_ENABLED(CONFIG_NET_DSA) |
536721b1 | 1760 | struct dsa_switch_tree *dsa_ptr; |
37cb0620 YX |
1761 | #endif |
1762 | #if IS_ENABLED(CONFIG_TIPC) | |
536721b1 | 1763 | struct tipc_bearer __rcu *tipc_ptr; |
91da11f8 | 1764 | #endif |
536721b1 KK |
1765 | void *atalk_ptr; |
1766 | struct in_device __rcu *ip_ptr; | |
1767 | struct dn_dev __rcu *dn_ptr; | |
1768 | struct inet6_dev __rcu *ip6_ptr; | |
1769 | void *ax25_ptr; | |
1770 | struct wireless_dev *ieee80211_ptr; | |
98a18b6f | 1771 | struct wpan_dev *ieee802154_ptr; |
03c57747 RS |
1772 | #if IS_ENABLED(CONFIG_MPLS_ROUTING) |
1773 | struct mpls_dev __rcu *mpls_ptr; | |
1774 | #endif | |
1da177e4 | 1775 | |
9356b8fc | 1776 | /* |
cd13539b | 1777 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1778 | */ |
9356b8fc | 1779 | /* Interface address info used in eth_type_trans() */ |
536721b1 | 1780 | unsigned char *dev_addr; |
f001fde5 | 1781 | |
a953be53 | 1782 | #ifdef CONFIG_SYSFS |
0a9627f2 TH |
1783 | struct netdev_rx_queue *_rx; |
1784 | ||
0a9627f2 | 1785 | unsigned int num_rx_queues; |
62fe0b40 | 1786 | unsigned int real_num_rx_queues; |
df334545 | 1787 | #endif |
0a9627f2 | 1788 | |
3b47d303 | 1789 | unsigned long gro_flush_timeout; |
61391cde | 1790 | rx_handler_func_t __rcu *rx_handler; |
1791 | void __rcu *rx_handler_data; | |
e8a0464c | 1792 | |
4cda01e8 | 1793 | #ifdef CONFIG_NET_CLS_ACT |
d2788d34 DB |
1794 | struct tcf_proto __rcu *ingress_cl_list; |
1795 | #endif | |
24824a09 | 1796 | struct netdev_queue __rcu *ingress_queue; |
e687ad60 | 1797 | #ifdef CONFIG_NETFILTER_INGRESS |
e3b37f11 | 1798 | struct nf_hook_entry __rcu *nf_hooks_ingress; |
e687ad60 | 1799 | #endif |
d2788d34 | 1800 | |
536721b1 | 1801 | unsigned char broadcast[MAX_ADDR_LEN]; |
14ffbbb8 TG |
1802 | #ifdef CONFIG_RFS_ACCEL |
1803 | struct cpu_rmap *rx_cpu_rmap; | |
1804 | #endif | |
1805 | struct hlist_node index_hlist; | |
cd13539b ED |
1806 | |
1807 | /* | |
1808 | * Cache lines mostly used on transmit path | |
1809 | */ | |
e8a0464c DM |
1810 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
1811 | unsigned int num_tx_queues; | |
fd2ea0a7 | 1812 | unsigned int real_num_tx_queues; |
af356afa | 1813 | struct Qdisc *qdisc; |
59cc1f61 JK |
1814 | #ifdef CONFIG_NET_SCHED |
1815 | DECLARE_HASHTABLE (qdisc_hash, 4); | |
1816 | #endif | |
536721b1 | 1817 | unsigned long tx_queue_len; |
c3f26a26 | 1818 | spinlock_t tx_global_lock; |
14ffbbb8 | 1819 | int watchdog_timeo; |
cd13539b | 1820 | |
bf264145 | 1821 | #ifdef CONFIG_XPS |
a4177869 | 1822 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1823 | #endif |
1f211a1b DB |
1824 | #ifdef CONFIG_NET_CLS_ACT |
1825 | struct tcf_proto __rcu *egress_cl_list; | |
1826 | #endif | |
0c4f691f | 1827 | |
9356b8fc | 1828 | /* These may be needed for future network-power-down code. */ |
9356b8fc ED |
1829 | struct timer_list watchdog_timer; |
1830 | ||
29b4433d | 1831 | int __percpu *pcpu_refcnt; |
1da177e4 | 1832 | struct list_head todo_list; |
1da177e4 | 1833 | |
e014debe | 1834 | struct list_head link_watch_list; |
572a103d | 1835 | |
1da177e4 | 1836 | enum { NETREG_UNINITIALIZED=0, |
b17a7c17 | 1837 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1838 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1839 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1840 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1841 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1842 | } reg_state:8; |
1843 | ||
536721b1 | 1844 | bool dismantle; |
a2835763 PM |
1845 | |
1846 | enum { | |
1847 | RTNL_LINK_INITIALIZED, | |
1848 | RTNL_LINK_INITIALIZING, | |
1849 | } rtnl_link_state:16; | |
1da177e4 | 1850 | |
d314774c | 1851 | void (*destructor)(struct net_device *dev); |
1da177e4 | 1852 | |
1da177e4 | 1853 | #ifdef CONFIG_NETPOLL |
5fbee843 | 1854 | struct netpoll_info __rcu *npinfo; |
1da177e4 | 1855 | #endif |
eae792b7 | 1856 | |
0c5c9fb5 | 1857 | possible_net_t nd_net; |
4a1c5371 | 1858 | |
4951704b | 1859 | /* mid-layer private */ |
a7855c78 | 1860 | union { |
536721b1 KK |
1861 | void *ml_priv; |
1862 | struct pcpu_lstats __percpu *lstats; | |
8f84985f | 1863 | struct pcpu_sw_netstats __percpu *tstats; |
536721b1 KK |
1864 | struct pcpu_dstats __percpu *dstats; |
1865 | struct pcpu_vstats __percpu *vstats; | |
a7855c78 | 1866 | }; |
536721b1 | 1867 | |
3cc77ec7 | 1868 | struct garp_port __rcu *garp_port; |
febf018d | 1869 | struct mrp_port __rcu *mrp_port; |
1da177e4 | 1870 | |
5e82b4b2 | 1871 | struct device dev; |
0c509a6c | 1872 | const struct attribute_group *sysfs_groups[4]; |
a953be53 | 1873 | const struct attribute_group *sysfs_rx_queue_group; |
38f7b870 | 1874 | |
38f7b870 | 1875 | const struct rtnl_link_ops *rtnl_link_ops; |
f25f4e44 | 1876 | |
82cc1a7a PWJ |
1877 | /* for setting kernel sock attribute on TCP connection setup */ |
1878 | #define GSO_MAX_SIZE 65536 | |
1879 | unsigned int gso_max_size; | |
30b678d8 BH |
1880 | #define GSO_MAX_SEGS 65535 |
1881 | u16 gso_max_segs; | |
743b03a8 | 1882 | |
7a6b6f51 | 1883 | #ifdef CONFIG_DCB |
32953543 | 1884 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1885 | #endif |
5e82b4b2 BH |
1886 | u8 num_tc; |
1887 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1888 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1889 | |
d11ead75 | 1890 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 | 1891 | unsigned int fcoe_ddp_xid; |
5bc1421e | 1892 | #endif |
86f8515f | 1893 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
5bc1421e | 1894 | struct netprio_map __rcu *priomap; |
4d288d57 | 1895 | #endif |
5e82b4b2 BH |
1896 | struct phy_device *phydev; |
1897 | struct lock_class_key *qdisc_tx_busylock; | |
f9eb8aea | 1898 | struct lock_class_key *qdisc_running_key; |
5e82b4b2 | 1899 | bool proto_down; |
1da177e4 | 1900 | }; |
43cb76d9 | 1901 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1902 | |
1903 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1904 | |
4f57c087 JF |
1905 | static inline |
1906 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1907 | { | |
1908 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1909 | } | |
1910 | ||
1911 | static inline | |
1912 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1913 | { | |
1914 | if (tc >= dev->num_tc) | |
1915 | return -EINVAL; | |
1916 | ||
1917 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1918 | return 0; | |
1919 | } | |
1920 | ||
8d059b0f | 1921 | int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); |
9cf1f6a8 AD |
1922 | void netdev_reset_tc(struct net_device *dev); |
1923 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); | |
1924 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc); | |
4f57c087 JF |
1925 | |
1926 | static inline | |
1927 | int netdev_get_num_tc(struct net_device *dev) | |
1928 | { | |
1929 | return dev->num_tc; | |
1930 | } | |
1931 | ||
e8a0464c DM |
1932 | static inline |
1933 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1934 | unsigned int index) | |
1935 | { | |
1936 | return &dev->_tx[index]; | |
1937 | } | |
1938 | ||
10c51b56 DB |
1939 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
1940 | const struct sk_buff *skb) | |
1941 | { | |
1942 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); | |
1943 | } | |
1944 | ||
e8a0464c DM |
1945 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
1946 | void (*f)(struct net_device *, | |
1947 | struct netdev_queue *, | |
1948 | void *), | |
1949 | void *arg) | |
1950 | { | |
1951 | unsigned int i; | |
1952 | ||
1953 | for (i = 0; i < dev->num_tx_queues; i++) | |
1954 | f(dev, &dev->_tx[i], arg); | |
1955 | } | |
1956 | ||
d3fff6c4 ED |
1957 | #define netdev_lockdep_set_classes(dev) \ |
1958 | { \ | |
1959 | static struct lock_class_key qdisc_tx_busylock_key; \ | |
1960 | static struct lock_class_key qdisc_running_key; \ | |
1961 | static struct lock_class_key qdisc_xmit_lock_key; \ | |
1962 | static struct lock_class_key dev_addr_list_lock_key; \ | |
1963 | unsigned int i; \ | |
1964 | \ | |
1965 | (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \ | |
1966 | (dev)->qdisc_running_key = &qdisc_running_key; \ | |
1967 | lockdep_set_class(&(dev)->addr_list_lock, \ | |
1968 | &dev_addr_list_lock_key); \ | |
1969 | for (i = 0; i < (dev)->num_tx_queues; i++) \ | |
1970 | lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \ | |
1971 | &qdisc_xmit_lock_key); \ | |
1972 | } | |
1973 | ||
f629d208 | 1974 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
f663dd9a JW |
1975 | struct sk_buff *skb, |
1976 | void *accel_priv); | |
8c4c49df | 1977 | |
871b642a PA |
1978 | /* returns the headroom that the master device needs to take in account |
1979 | * when forwarding to this dev | |
1980 | */ | |
1981 | static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) | |
1982 | { | |
1983 | return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; | |
1984 | } | |
1985 | ||
1986 | static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) | |
1987 | { | |
1988 | if (dev->netdev_ops->ndo_set_rx_headroom) | |
1989 | dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); | |
1990 | } | |
1991 | ||
1992 | /* set the device rx headroom to the dev's default */ | |
1993 | static inline void netdev_reset_rx_headroom(struct net_device *dev) | |
1994 | { | |
1995 | netdev_set_rx_headroom(dev, -1); | |
1996 | } | |
1997 | ||
c346dca1 YH |
1998 | /* |
1999 | * Net namespace inlines | |
2000 | */ | |
2001 | static inline | |
2002 | struct net *dev_net(const struct net_device *dev) | |
2003 | { | |
c2d9ba9b | 2004 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
2005 | } |
2006 | ||
2007 | static inline | |
f5aa23fd | 2008 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 | 2009 | { |
0c5c9fb5 | 2010 | write_pnet(&dev->nd_net, net); |
c346dca1 YH |
2011 | } |
2012 | ||
3e8a72d1 | 2013 | static inline bool netdev_uses_dsa(struct net_device *dev) |
cf85d08f | 2014 | { |
3fc88677 | 2015 | #if IS_ENABLED(CONFIG_NET_DSA) |
5aed85ce FF |
2016 | if (dev->dsa_ptr != NULL) |
2017 | return dsa_uses_tagged_protocol(dev->dsa_ptr); | |
396138f0 | 2018 | #endif |
5aed85ce | 2019 | return false; |
396138f0 LB |
2020 | } |
2021 | ||
bea3348e SH |
2022 | /** |
2023 | * netdev_priv - access network device private data | |
2024 | * @dev: network device | |
2025 | * | |
2026 | * Get network device private data | |
2027 | */ | |
6472ce60 | 2028 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 2029 | { |
1ce8e7b5 | 2030 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
2031 | } |
2032 | ||
1da177e4 LT |
2033 | /* Set the sysfs physical device reference for the network logical device |
2034 | * if set prior to registration will cause a symlink during initialization. | |
2035 | */ | |
43cb76d9 | 2036 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 2037 | |
384912ed | 2038 | /* Set the sysfs device type for the network logical device to allow |
3f79410c | 2039 | * fine-grained identification of different network device types. For |
5e82b4b2 | 2040 | * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
384912ed MH |
2041 | */ |
2042 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
2043 | ||
82dc3c63 ED |
2044 | /* Default NAPI poll() weight |
2045 | * Device drivers are strongly advised to not use bigger value | |
2046 | */ | |
2047 | #define NAPI_POLL_WEIGHT 64 | |
2048 | ||
3b582cc1 | 2049 | /** |
5e82b4b2 | 2050 | * netif_napi_add - initialize a NAPI context |
3b582cc1 | 2051 | * @dev: network device |
5e82b4b2 | 2052 | * @napi: NAPI context |
3b582cc1 SH |
2053 | * @poll: polling function |
2054 | * @weight: default weight | |
2055 | * | |
5e82b4b2 BH |
2056 | * netif_napi_add() must be used to initialize a NAPI context prior to calling |
2057 | * *any* of the other NAPI-related functions. | |
3b582cc1 | 2058 | */ |
d565b0a1 HX |
2059 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
2060 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 2061 | |
d64b5e85 | 2062 | /** |
5e82b4b2 | 2063 | * netif_tx_napi_add - initialize a NAPI context |
d64b5e85 | 2064 | * @dev: network device |
5e82b4b2 | 2065 | * @napi: NAPI context |
d64b5e85 ED |
2066 | * @poll: polling function |
2067 | * @weight: default weight | |
2068 | * | |
2069 | * This variant of netif_napi_add() should be used from drivers using NAPI | |
2070 | * to exclusively poll a TX queue. | |
2071 | * This will avoid we add it into napi_hash[], thus polluting this hash table. | |
2072 | */ | |
2073 | static inline void netif_tx_napi_add(struct net_device *dev, | |
2074 | struct napi_struct *napi, | |
2075 | int (*poll)(struct napi_struct *, int), | |
2076 | int weight) | |
2077 | { | |
2078 | set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); | |
2079 | netif_napi_add(dev, napi, poll, weight); | |
2080 | } | |
2081 | ||
d8156534 | 2082 | /** |
5e82b4b2 BH |
2083 | * netif_napi_del - remove a NAPI context |
2084 | * @napi: NAPI context | |
d8156534 | 2085 | * |
5e82b4b2 | 2086 | * netif_napi_del() removes a NAPI context from the network device NAPI list |
d8156534 | 2087 | */ |
d565b0a1 HX |
2088 | void netif_napi_del(struct napi_struct *napi); |
2089 | ||
2090 | struct napi_gro_cb { | |
78a478d0 | 2091 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
5e82b4b2 | 2092 | void *frag0; |
78a478d0 | 2093 | |
7489594c HX |
2094 | /* Length of frag0. */ |
2095 | unsigned int frag0_len; | |
2096 | ||
86911732 | 2097 | /* This indicates where we are processing relative to skb->data. */ |
5e82b4b2 | 2098 | int data_offset; |
86911732 | 2099 | |
d565b0a1 | 2100 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
bf5a755f JC |
2101 | u16 flush; |
2102 | ||
2103 | /* Save the IP ID here and check when we get to the transport layer */ | |
2104 | u16 flush_id; | |
d565b0a1 HX |
2105 | |
2106 | /* Number of segments aggregated. */ | |
2e71a6f8 ED |
2107 | u16 count; |
2108 | ||
15e2396d TH |
2109 | /* Start offset for remote checksum offload */ |
2110 | u16 gro_remcsum_start; | |
2111 | ||
2e71a6f8 ED |
2112 | /* jiffies when first packet was created/queued */ |
2113 | unsigned long age; | |
86347245 | 2114 | |
afe93325 | 2115 | /* Used in ipv6_gro_receive() and foo-over-udp */ |
b582ef09 OG |
2116 | u16 proto; |
2117 | ||
baa32ff4 TH |
2118 | /* This is non-zero if the packet may be of the same flow. */ |
2119 | u8 same_flow:1; | |
2120 | ||
fac8e0f5 JG |
2121 | /* Used in tunnel GRO receive */ |
2122 | u8 encap_mark:1; | |
573e8fca TH |
2123 | |
2124 | /* GRO checksum is valid */ | |
2125 | u8 csum_valid:1; | |
2126 | ||
662880f4 TH |
2127 | /* Number of checksums via CHECKSUM_UNNECESSARY */ |
2128 | u8 csum_cnt:3; | |
c3c7c254 | 2129 | |
baa32ff4 TH |
2130 | /* Free the skb? */ |
2131 | u8 free:2; | |
2132 | #define NAPI_GRO_FREE 1 | |
2133 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 | |
2134 | ||
efc98d08 TH |
2135 | /* Used in foo-over-udp, set in udp[46]_gro_receive */ |
2136 | u8 is_ipv6:1; | |
2137 | ||
a0ca153f AD |
2138 | /* Used in GRE, set in fou/gue_gro_receive */ |
2139 | u8 is_fou:1; | |
2140 | ||
1530545e AD |
2141 | /* Used to determine if flush_id can be ignored */ |
2142 | u8 is_atomic:1; | |
2143 | ||
fcd91dd4 SD |
2144 | /* Number of gro_receive callbacks this packet already went through */ |
2145 | u8 recursion_counter:4; | |
2146 | ||
2147 | /* 1 bit hole */ | |
baa32ff4 | 2148 | |
bf5a755f JC |
2149 | /* used to support CHECKSUM_COMPLETE for tunneling protocols */ |
2150 | __wsum csum; | |
2151 | ||
c3c7c254 ED |
2152 | /* used in skb_gro_receive() slow path */ |
2153 | struct sk_buff *last; | |
d565b0a1 HX |
2154 | }; |
2155 | ||
2156 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 2157 | |
fcd91dd4 SD |
2158 | #define GRO_RECURSION_LIMIT 15 |
2159 | static inline int gro_recursion_inc_test(struct sk_buff *skb) | |
2160 | { | |
2161 | return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT; | |
2162 | } | |
2163 | ||
2164 | typedef struct sk_buff **(*gro_receive_t)(struct sk_buff **, struct sk_buff *); | |
2165 | static inline struct sk_buff **call_gro_receive(gro_receive_t cb, | |
2166 | struct sk_buff **head, | |
2167 | struct sk_buff *skb) | |
2168 | { | |
2169 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2170 | NAPI_GRO_CB(skb)->flush |= 1; | |
2171 | return NULL; | |
2172 | } | |
2173 | ||
2174 | return cb(head, skb); | |
2175 | } | |
2176 | ||
2177 | typedef struct sk_buff **(*gro_receive_sk_t)(struct sock *, struct sk_buff **, | |
2178 | struct sk_buff *); | |
2179 | static inline struct sk_buff **call_gro_receive_sk(gro_receive_sk_t cb, | |
2180 | struct sock *sk, | |
2181 | struct sk_buff **head, | |
2182 | struct sk_buff *skb) | |
2183 | { | |
2184 | if (unlikely(gro_recursion_inc_test(skb))) { | |
2185 | NAPI_GRO_CB(skb)->flush |= 1; | |
2186 | return NULL; | |
2187 | } | |
2188 | ||
2189 | return cb(sk, head, skb); | |
2190 | } | |
2191 | ||
1da177e4 | 2192 | struct packet_type { |
f2ccd8fa DM |
2193 | __be16 type; /* This is really htons(ether_type). */ |
2194 | struct net_device *dev; /* NULL is wildcarded here */ | |
2195 | int (*func) (struct sk_buff *, | |
2196 | struct net_device *, | |
2197 | struct packet_type *, | |
2198 | struct net_device *); | |
c0de08d0 EL |
2199 | bool (*id_match)(struct packet_type *ptype, |
2200 | struct sock *sk); | |
1da177e4 LT |
2201 | void *af_packet_priv; |
2202 | struct list_head list; | |
2203 | }; | |
2204 | ||
f191a1d1 | 2205 | struct offload_callbacks { |
576a30eb | 2206 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 2207 | netdev_features_t features); |
d565b0a1 | 2208 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
a2b12f3c | 2209 | struct sk_buff *skb); |
299603e8 | 2210 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
f191a1d1 VY |
2211 | }; |
2212 | ||
2213 | struct packet_offload { | |
2214 | __be16 type; /* This is really htons(ether_type). */ | |
bdef7de4 | 2215 | u16 priority; |
f191a1d1 VY |
2216 | struct offload_callbacks callbacks; |
2217 | struct list_head list; | |
1da177e4 LT |
2218 | }; |
2219 | ||
5e82b4b2 | 2220 | /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
8f84985f LR |
2221 | struct pcpu_sw_netstats { |
2222 | u64 rx_packets; | |
2223 | u64 rx_bytes; | |
2224 | u64 tx_packets; | |
2225 | u64 tx_bytes; | |
2226 | struct u64_stats_sync syncp; | |
2227 | }; | |
2228 | ||
aabc92bb PNA |
2229 | #define __netdev_alloc_pcpu_stats(type, gfp) \ |
2230 | ({ \ | |
2231 | typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ | |
2232 | if (pcpu_stats) { \ | |
2233 | int __cpu; \ | |
2234 | for_each_possible_cpu(__cpu) { \ | |
2235 | typeof(type) *stat; \ | |
2236 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ | |
2237 | u64_stats_init(&stat->syncp); \ | |
2238 | } \ | |
2239 | } \ | |
2240 | pcpu_stats; \ | |
1c213bd2 WC |
2241 | }) |
2242 | ||
aabc92bb | 2243 | #define netdev_alloc_pcpu_stats(type) \ |
326fcfa5 | 2244 | __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
aabc92bb | 2245 | |
764f5e54 JP |
2246 | enum netdev_lag_tx_type { |
2247 | NETDEV_LAG_TX_TYPE_UNKNOWN, | |
2248 | NETDEV_LAG_TX_TYPE_RANDOM, | |
2249 | NETDEV_LAG_TX_TYPE_BROADCAST, | |
2250 | NETDEV_LAG_TX_TYPE_ROUNDROBIN, | |
2251 | NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, | |
2252 | NETDEV_LAG_TX_TYPE_HASH, | |
2253 | }; | |
2254 | ||
2255 | struct netdev_lag_upper_info { | |
2256 | enum netdev_lag_tx_type tx_type; | |
2257 | }; | |
2258 | ||
fb1b2e3c JP |
2259 | struct netdev_lag_lower_state_info { |
2260 | u8 link_up : 1, | |
2261 | tx_enabled : 1; | |
2262 | }; | |
2263 | ||
1da177e4 LT |
2264 | #include <linux/notifier.h> |
2265 | ||
dcfe1421 AW |
2266 | /* netdevice notifier chain. Please remember to update the rtnetlink |
2267 | * notification exclusion list in rtnetlink_event() when adding new | |
2268 | * types. | |
2269 | */ | |
2270 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
2271 | #define NETDEV_DOWN 0x0002 | |
2272 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
2273 | detected a hardware crash and restarted | |
2274 | - we can use this eg to kick tcp sessions | |
2275 | once done */ | |
2276 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
2277 | #define NETDEV_REGISTER 0x0005 | |
2278 | #define NETDEV_UNREGISTER 0x0006 | |
1d486bfb | 2279 | #define NETDEV_CHANGEMTU 0x0007 /* notify after mtu change happened */ |
dcfe1421 AW |
2280 | #define NETDEV_CHANGEADDR 0x0008 |
2281 | #define NETDEV_GOING_DOWN 0x0009 | |
2282 | #define NETDEV_CHANGENAME 0x000A | |
2283 | #define NETDEV_FEAT_CHANGE 0x000B | |
2284 | #define NETDEV_BONDING_FAILOVER 0x000C | |
2285 | #define NETDEV_PRE_UP 0x000D | |
2286 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
2287 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
2288 | #define NETDEV_POST_INIT 0x0010 | |
0115e8e3 | 2289 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
dcfe1421 AW |
2290 | #define NETDEV_RELEASE 0x0012 |
2291 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
2292 | #define NETDEV_JOIN 0x0014 | |
42e52bf9 | 2293 | #define NETDEV_CHANGEUPPER 0x0015 |
4aa5dee4 | 2294 | #define NETDEV_RESEND_IGMP 0x0016 |
1d486bfb | 2295 | #define NETDEV_PRECHANGEMTU 0x0017 /* notify before mtu change happened */ |
d4261e56 | 2296 | #define NETDEV_CHANGEINFODATA 0x0018 |
61bd3857 | 2297 | #define NETDEV_BONDING_INFO 0x0019 |
573c7ba0 | 2298 | #define NETDEV_PRECHANGEUPPER 0x001A |
04d48266 | 2299 | #define NETDEV_CHANGELOWERSTATE 0x001B |
7c46a640 | 2300 | #define NETDEV_UDP_TUNNEL_PUSH_INFO 0x001C |
08294a26 | 2301 | #define NETDEV_CHANGE_TX_QUEUE_LEN 0x001E |
dcfe1421 | 2302 | |
f629d208 JP |
2303 | int register_netdevice_notifier(struct notifier_block *nb); |
2304 | int unregister_netdevice_notifier(struct notifier_block *nb); | |
351638e7 JP |
2305 | |
2306 | struct netdev_notifier_info { | |
2307 | struct net_device *dev; | |
2308 | }; | |
2309 | ||
be9efd36 JP |
2310 | struct netdev_notifier_change_info { |
2311 | struct netdev_notifier_info info; /* must be first */ | |
2312 | unsigned int flags_changed; | |
2313 | }; | |
2314 | ||
0e4ead9d JP |
2315 | struct netdev_notifier_changeupper_info { |
2316 | struct netdev_notifier_info info; /* must be first */ | |
2317 | struct net_device *upper_dev; /* new upper dev */ | |
2318 | bool master; /* is upper dev master */ | |
5e82b4b2 | 2319 | bool linking; /* is the notification for link or unlink */ |
29bf24af | 2320 | void *upper_info; /* upper dev info */ |
0e4ead9d JP |
2321 | }; |
2322 | ||
04d48266 JP |
2323 | struct netdev_notifier_changelowerstate_info { |
2324 | struct netdev_notifier_info info; /* must be first */ | |
2325 | void *lower_state_info; /* is lower dev state */ | |
2326 | }; | |
2327 | ||
75538c2b CW |
2328 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2329 | struct net_device *dev) | |
2330 | { | |
2331 | info->dev = dev; | |
2332 | } | |
2333 | ||
351638e7 JP |
2334 | static inline struct net_device * |
2335 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) | |
2336 | { | |
2337 | return info->dev; | |
2338 | } | |
2339 | ||
f629d208 | 2340 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
dcfe1421 AW |
2341 | |
2342 | ||
1da177e4 LT |
2343 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2344 | ||
881d966b EB |
2345 | #define for_each_netdev(net, d) \ |
2346 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
2347 | #define for_each_netdev_reverse(net, d) \ |
2348 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
2349 | #define for_each_netdev_rcu(net, d) \ |
2350 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
2351 | #define for_each_netdev_safe(net, d, n) \ |
2352 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
2353 | #define for_each_netdev_continue(net, d) \ | |
2354 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 2355 | #define for_each_netdev_continue_rcu(net, d) \ |
2356 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
8a7fbfab | 2357 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2358 | for_each_netdev_rcu(&init_net, slave) \ | |
4ccce02e | 2359 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
881d966b | 2360 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 2361 | |
a050c33f DL |
2362 | static inline struct net_device *next_net_device(struct net_device *dev) |
2363 | { | |
2364 | struct list_head *lh; | |
2365 | struct net *net; | |
2366 | ||
c346dca1 | 2367 | net = dev_net(dev); |
a050c33f DL |
2368 | lh = dev->dev_list.next; |
2369 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2370 | } | |
2371 | ||
ce81b76a ED |
2372 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2373 | { | |
2374 | struct list_head *lh; | |
2375 | struct net *net; | |
2376 | ||
2377 | net = dev_net(dev); | |
ccf43438 | 2378 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
2379 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2380 | } | |
2381 | ||
a050c33f DL |
2382 | static inline struct net_device *first_net_device(struct net *net) |
2383 | { | |
2384 | return list_empty(&net->dev_base_head) ? NULL : | |
2385 | net_device_entry(net->dev_base_head.next); | |
2386 | } | |
7562f876 | 2387 | |
ccf43438 ED |
2388 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2389 | { | |
2390 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
2391 | ||
2392 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
2393 | } | |
2394 | ||
f629d208 JP |
2395 | int netdev_boot_setup_check(struct net_device *dev); |
2396 | unsigned long netdev_boot_base(const char *prefix, int unit); | |
2397 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, | |
2398 | const char *hwaddr); | |
2399 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2400 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
2401 | void dev_add_pack(struct packet_type *pt); | |
2402 | void dev_remove_pack(struct packet_type *pt); | |
2403 | void __dev_remove_pack(struct packet_type *pt); | |
2404 | void dev_add_offload(struct packet_offload *po); | |
2405 | void dev_remove_offload(struct packet_offload *po); | |
f629d208 | 2406 | |
a54acb3a | 2407 | int dev_get_iflink(const struct net_device *dev); |
fc4099f1 | 2408 | int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
6c555490 WC |
2409 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2410 | unsigned short mask); | |
f629d208 JP |
2411 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2412 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); | |
2413 | struct net_device *__dev_get_by_name(struct net *net, const char *name); | |
2414 | int dev_alloc_name(struct net_device *dev, const char *name); | |
2415 | int dev_open(struct net_device *dev); | |
2416 | int dev_close(struct net_device *dev); | |
99c4a26a | 2417 | int dev_close_many(struct list_head *head, bool unlink); |
f629d208 | 2418 | void dev_disable_lro(struct net_device *dev); |
0c4b51f0 | 2419 | int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
2b4aa3ce | 2420 | int dev_queue_xmit(struct sk_buff *skb); |
f663dd9a | 2421 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
f629d208 JP |
2422 | int register_netdevice(struct net_device *dev); |
2423 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); | |
2424 | void unregister_netdevice_many(struct list_head *head); | |
44a0873d ED |
2425 | static inline void unregister_netdevice(struct net_device *dev) |
2426 | { | |
2427 | unregister_netdevice_queue(dev, NULL); | |
2428 | } | |
2429 | ||
f629d208 JP |
2430 | int netdev_refcnt_read(const struct net_device *dev); |
2431 | void free_netdev(struct net_device *dev); | |
74d332c1 | 2432 | void netdev_freemem(struct net_device *dev); |
f629d208 JP |
2433 | void synchronize_net(void); |
2434 | int init_dummy_netdev(struct net_device *dev); | |
937f1ba5 | 2435 | |
f60e5990 | 2436 | DECLARE_PER_CPU(int, xmit_recursion); |
a70b506e DB |
2437 | #define XMIT_RECURSION_LIMIT 10 |
2438 | ||
f60e5990 | 2439 | static inline int dev_recursion_level(void) |
2440 | { | |
2441 | return this_cpu_read(xmit_recursion); | |
2442 | } | |
2443 | ||
f629d208 JP |
2444 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
2445 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
2446 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); | |
2447 | int netdev_get_name(struct net *net, char *name, int ifindex); | |
2448 | int dev_restart(struct net_device *dev); | |
f629d208 | 2449 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
86911732 HX |
2450 | |
2451 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
2452 | { | |
2453 | return NAPI_GRO_CB(skb)->data_offset; | |
2454 | } | |
2455 | ||
2456 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
2457 | { | |
2458 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
2459 | } | |
2460 | ||
2461 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
2462 | { | |
2463 | NAPI_GRO_CB(skb)->data_offset += len; | |
2464 | } | |
2465 | ||
a5b1cf28 HX |
2466 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
2467 | unsigned int offset) | |
86911732 | 2468 | { |
a5b1cf28 HX |
2469 | return NAPI_GRO_CB(skb)->frag0 + offset; |
2470 | } | |
78a478d0 | 2471 | |
a5b1cf28 HX |
2472 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
2473 | { | |
2474 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
2475 | } | |
78a478d0 | 2476 | |
57ea52a8 HX |
2477 | static inline void skb_gro_frag0_invalidate(struct sk_buff *skb) |
2478 | { | |
2479 | NAPI_GRO_CB(skb)->frag0 = NULL; | |
2480 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
2481 | } | |
2482 | ||
a5b1cf28 HX |
2483 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
2484 | unsigned int offset) | |
2485 | { | |
17dd759c HX |
2486 | if (!pskb_may_pull(skb, hlen)) |
2487 | return NULL; | |
2488 | ||
57ea52a8 | 2489 | skb_gro_frag0_invalidate(skb); |
17dd759c | 2490 | return skb->data + offset; |
86911732 | 2491 | } |
1da177e4 | 2492 | |
36e7b1b8 HX |
2493 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
2494 | { | |
78d3fd0b HX |
2495 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
2496 | skb_network_offset(skb); | |
36e7b1b8 HX |
2497 | } |
2498 | ||
bf5a755f JC |
2499 | static inline void skb_gro_postpull_rcsum(struct sk_buff *skb, |
2500 | const void *start, unsigned int len) | |
2501 | { | |
573e8fca | 2502 | if (NAPI_GRO_CB(skb)->csum_valid) |
bf5a755f JC |
2503 | NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum, |
2504 | csum_partial(start, len, 0)); | |
2505 | } | |
2506 | ||
573e8fca TH |
2507 | /* GRO checksum functions. These are logical equivalents of the normal |
2508 | * checksum functions (in skbuff.h) except that they operate on the GRO | |
2509 | * offsets and fields in sk_buff. | |
2510 | */ | |
2511 | ||
2512 | __sum16 __skb_gro_checksum_complete(struct sk_buff *skb); | |
2513 | ||
15e2396d TH |
2514 | static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb) |
2515 | { | |
b7fe10e5 | 2516 | return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb)); |
15e2396d TH |
2517 | } |
2518 | ||
573e8fca TH |
2519 | static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb, |
2520 | bool zero_okay, | |
2521 | __sum16 check) | |
2522 | { | |
6edec0e6 TH |
2523 | return ((skb->ip_summed != CHECKSUM_PARTIAL || |
2524 | skb_checksum_start_offset(skb) < | |
2525 | skb_gro_offset(skb)) && | |
15e2396d | 2526 | !skb_at_gro_remcsum_start(skb) && |
662880f4 | 2527 | NAPI_GRO_CB(skb)->csum_cnt == 0 && |
573e8fca TH |
2528 | (!zero_okay || check)); |
2529 | } | |
2530 | ||
2531 | static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb, | |
2532 | __wsum psum) | |
2533 | { | |
2534 | if (NAPI_GRO_CB(skb)->csum_valid && | |
2535 | !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum))) | |
2536 | return 0; | |
2537 | ||
2538 | NAPI_GRO_CB(skb)->csum = psum; | |
2539 | ||
2540 | return __skb_gro_checksum_complete(skb); | |
2541 | } | |
2542 | ||
573e8fca TH |
2543 | static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb) |
2544 | { | |
662880f4 TH |
2545 | if (NAPI_GRO_CB(skb)->csum_cnt > 0) { |
2546 | /* Consume a checksum from CHECKSUM_UNNECESSARY */ | |
2547 | NAPI_GRO_CB(skb)->csum_cnt--; | |
2548 | } else { | |
2549 | /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we | |
2550 | * verified a new top level checksum or an encapsulated one | |
2551 | * during GRO. This saves work if we fallback to normal path. | |
2552 | */ | |
2553 | __skb_incr_checksum_unnecessary(skb); | |
573e8fca TH |
2554 | } |
2555 | } | |
2556 | ||
2557 | #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \ | |
2558 | compute_pseudo) \ | |
2559 | ({ \ | |
2560 | __sum16 __ret = 0; \ | |
2561 | if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \ | |
2562 | __ret = __skb_gro_checksum_validate_complete(skb, \ | |
2563 | compute_pseudo(skb, proto)); \ | |
5a212329 TH |
2564 | if (__ret) \ |
2565 | __skb_mark_checksum_bad(skb); \ | |
2566 | else \ | |
573e8fca TH |
2567 | skb_gro_incr_csum_unnecessary(skb); \ |
2568 | __ret; \ | |
2569 | }) | |
2570 | ||
2571 | #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \ | |
2572 | __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo) | |
2573 | ||
2574 | #define skb_gro_checksum_validate_zero_check(skb, proto, check, \ | |
2575 | compute_pseudo) \ | |
2576 | __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo) | |
2577 | ||
2578 | #define skb_gro_checksum_simple_validate(skb) \ | |
2579 | __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo) | |
2580 | ||
d96535a1 TH |
2581 | static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb) |
2582 | { | |
2583 | return (NAPI_GRO_CB(skb)->csum_cnt == 0 && | |
2584 | !NAPI_GRO_CB(skb)->csum_valid); | |
2585 | } | |
2586 | ||
2587 | static inline void __skb_gro_checksum_convert(struct sk_buff *skb, | |
2588 | __sum16 check, __wsum pseudo) | |
2589 | { | |
2590 | NAPI_GRO_CB(skb)->csum = ~pseudo; | |
2591 | NAPI_GRO_CB(skb)->csum_valid = 1; | |
2592 | } | |
2593 | ||
2594 | #define skb_gro_checksum_try_convert(skb, proto, check, compute_pseudo) \ | |
2595 | do { \ | |
2596 | if (__skb_gro_checksum_convert_check(skb)) \ | |
2597 | __skb_gro_checksum_convert(skb, check, \ | |
2598 | compute_pseudo(skb, proto)); \ | |
2599 | } while (0) | |
2600 | ||
26c4f7da TH |
2601 | struct gro_remcsum { |
2602 | int offset; | |
2603 | __wsum delta; | |
2604 | }; | |
2605 | ||
2606 | static inline void skb_gro_remcsum_init(struct gro_remcsum *grc) | |
2607 | { | |
846cd667 | 2608 | grc->offset = 0; |
26c4f7da TH |
2609 | grc->delta = 0; |
2610 | } | |
2611 | ||
b7fe10e5 TH |
2612 | static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr, |
2613 | unsigned int off, size_t hdrlen, | |
2614 | int start, int offset, | |
2615 | struct gro_remcsum *grc, | |
2616 | bool nopartial) | |
dcdc8994 TH |
2617 | { |
2618 | __wsum delta; | |
b7fe10e5 | 2619 | size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start); |
dcdc8994 TH |
2620 | |
2621 | BUG_ON(!NAPI_GRO_CB(skb)->csum_valid); | |
2622 | ||
15e2396d | 2623 | if (!nopartial) { |
b7fe10e5 TH |
2624 | NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start; |
2625 | return ptr; | |
2626 | } | |
2627 | ||
2628 | ptr = skb_gro_header_fast(skb, off); | |
2629 | if (skb_gro_header_hard(skb, off + plen)) { | |
2630 | ptr = skb_gro_header_slow(skb, off + plen, off); | |
2631 | if (!ptr) | |
2632 | return NULL; | |
15e2396d TH |
2633 | } |
2634 | ||
b7fe10e5 TH |
2635 | delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum, |
2636 | start, offset); | |
dcdc8994 TH |
2637 | |
2638 | /* Adjust skb->csum since we changed the packet */ | |
dcdc8994 | 2639 | NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta); |
26c4f7da | 2640 | |
b7fe10e5 | 2641 | grc->offset = off + hdrlen + offset; |
26c4f7da | 2642 | grc->delta = delta; |
b7fe10e5 TH |
2643 | |
2644 | return ptr; | |
dcdc8994 TH |
2645 | } |
2646 | ||
26c4f7da TH |
2647 | static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb, |
2648 | struct gro_remcsum *grc) | |
2649 | { | |
b7fe10e5 TH |
2650 | void *ptr; |
2651 | size_t plen = grc->offset + sizeof(u16); | |
2652 | ||
26c4f7da TH |
2653 | if (!grc->delta) |
2654 | return; | |
2655 | ||
b7fe10e5 TH |
2656 | ptr = skb_gro_header_fast(skb, grc->offset); |
2657 | if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) { | |
2658 | ptr = skb_gro_header_slow(skb, plen, grc->offset); | |
2659 | if (!ptr) | |
2660 | return; | |
2661 | } | |
2662 | ||
2663 | remcsum_unadjust((__sum16 *)ptr, grc->delta); | |
26c4f7da | 2664 | } |
dcdc8994 | 2665 | |
0c4e8581 SH |
2666 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
2667 | unsigned short type, | |
3b04ddde | 2668 | const void *daddr, const void *saddr, |
95c96174 | 2669 | unsigned int len) |
0c4e8581 | 2670 | { |
f1ecfd5d | 2671 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 2672 | return 0; |
3b04ddde SH |
2673 | |
2674 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
2675 | } |
2676 | ||
b95cce35 SH |
2677 | static inline int dev_parse_header(const struct sk_buff *skb, |
2678 | unsigned char *haddr) | |
2679 | { | |
2680 | const struct net_device *dev = skb->dev; | |
2681 | ||
1b83336b | 2682 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 2683 | return 0; |
3b04ddde | 2684 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
2685 | } |
2686 | ||
2793a23a WB |
2687 | /* ll_header must have at least hard_header_len allocated */ |
2688 | static inline bool dev_validate_header(const struct net_device *dev, | |
2689 | char *ll_header, int len) | |
2690 | { | |
2691 | if (likely(len >= dev->hard_header_len)) | |
2692 | return true; | |
2693 | ||
2694 | if (capable(CAP_SYS_RAWIO)) { | |
2695 | memset(ll_header + len, 0, dev->hard_header_len - len); | |
2696 | return true; | |
2697 | } | |
2698 | ||
2699 | if (dev->header_ops && dev->header_ops->validate) | |
2700 | return dev->header_ops->validate(ll_header, len); | |
2701 | ||
2702 | return false; | |
2703 | } | |
2704 | ||
1da177e4 | 2705 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
f629d208 | 2706 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1da177e4 LT |
2707 | static inline int unregister_gifconf(unsigned int family) |
2708 | { | |
2709 | return register_gifconf(family, NULL); | |
2710 | } | |
2711 | ||
99bbc707 | 2712 | #ifdef CONFIG_NET_FLOW_LIMIT |
5f121b9a | 2713 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
99bbc707 WB |
2714 | struct sd_flow_limit { |
2715 | u64 count; | |
2716 | unsigned int num_buckets; | |
2717 | unsigned int history_head; | |
2718 | u16 history[FLOW_LIMIT_HISTORY]; | |
2719 | u8 buckets[]; | |
2720 | }; | |
2721 | ||
2722 | extern int netdev_flow_limit_table_len; | |
2723 | #endif /* CONFIG_NET_FLOW_LIMIT */ | |
2724 | ||
1da177e4 | 2725 | /* |
5e82b4b2 | 2726 | * Incoming packets are placed on per-CPU queues |
1da177e4 | 2727 | */ |
d94d9fee | 2728 | struct softnet_data { |
1da177e4 | 2729 | struct list_head poll_list; |
6e7676c1 | 2730 | struct sk_buff_head process_queue; |
1da177e4 | 2731 | |
dee42870 | 2732 | /* stats */ |
cd7b5396 DM |
2733 | unsigned int processed; |
2734 | unsigned int time_squeeze; | |
cd7b5396 | 2735 | unsigned int received_rps; |
fd793d89 | 2736 | #ifdef CONFIG_RPS |
88751275 | 2737 | struct softnet_data *rps_ipi_list; |
4cdb1e2e ED |
2738 | #endif |
2739 | #ifdef CONFIG_NET_FLOW_LIMIT | |
2740 | struct sd_flow_limit __rcu *flow_limit; | |
2741 | #endif | |
2742 | struct Qdisc *output_queue; | |
2743 | struct Qdisc **output_queue_tailp; | |
2744 | struct sk_buff *completion_queue; | |
88751275 | 2745 | |
4cdb1e2e | 2746 | #ifdef CONFIG_RPS |
501e7ef5 ED |
2747 | /* input_queue_head should be written by cpu owning this struct, |
2748 | * and only read by other cpus. Worth using a cache line. | |
2749 | */ | |
2750 | unsigned int input_queue_head ____cacheline_aligned_in_smp; | |
2751 | ||
2752 | /* Elements below can be accessed between CPUs for RPS/RFS */ | |
0a9627f2 | 2753 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
2754 | struct softnet_data *rps_ipi_next; |
2755 | unsigned int cpu; | |
76cc8b13 | 2756 | unsigned int input_queue_tail; |
1e94d72f | 2757 | #endif |
95c96174 | 2758 | unsigned int dropped; |
0a9627f2 | 2759 | struct sk_buff_head input_pkt_queue; |
bea3348e | 2760 | struct napi_struct backlog; |
99bbc707 | 2761 | |
1da177e4 LT |
2762 | }; |
2763 | ||
76cc8b13 | 2764 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
2765 | { |
2766 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
2767 | sd->input_queue_head++; |
2768 | #endif | |
2769 | } | |
2770 | ||
2771 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
2772 | unsigned int *qtail) | |
2773 | { | |
2774 | #ifdef CONFIG_RPS | |
2775 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
2776 | #endif |
2777 | } | |
2778 | ||
0a9627f2 | 2779 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 2780 | |
f629d208 | 2781 | void __netif_schedule(struct Qdisc *q); |
46e5da40 | 2782 | void netif_schedule_queue(struct netdev_queue *txq); |
86d804e1 | 2783 | |
fd2ea0a7 DM |
2784 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2785 | { | |
2786 | unsigned int i; | |
2787 | ||
2788 | for (i = 0; i < dev->num_tx_queues; i++) | |
2789 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
2790 | } | |
2791 | ||
f9a7cbbf | 2792 | static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
d29f749e | 2793 | { |
73466498 | 2794 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2795 | } |
2796 | ||
bea3348e SH |
2797 | /** |
2798 | * netif_start_queue - allow transmit | |
2799 | * @dev: network device | |
2800 | * | |
2801 | * Allow upper layers to call the device hard_start_xmit routine. | |
2802 | */ | |
1da177e4 LT |
2803 | static inline void netif_start_queue(struct net_device *dev) |
2804 | { | |
e8a0464c | 2805 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2806 | } |
2807 | ||
fd2ea0a7 DM |
2808 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2809 | { | |
2810 | unsigned int i; | |
2811 | ||
2812 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2813 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2814 | netif_tx_start_queue(txq); | |
2815 | } | |
2816 | } | |
2817 | ||
46e5da40 | 2818 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
79d16385 | 2819 | |
d29f749e DJ |
2820 | /** |
2821 | * netif_wake_queue - restart transmit | |
2822 | * @dev: network device | |
2823 | * | |
2824 | * Allow upper layers to call the device hard_start_xmit routine. | |
2825 | * Used for flow control when transmit resources are available. | |
2826 | */ | |
79d16385 DM |
2827 | static inline void netif_wake_queue(struct net_device *dev) |
2828 | { | |
e8a0464c | 2829 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2830 | } |
2831 | ||
fd2ea0a7 DM |
2832 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2833 | { | |
2834 | unsigned int i; | |
2835 | ||
2836 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2837 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
2838 | netif_tx_wake_queue(txq); | |
2839 | } | |
2840 | } | |
2841 | ||
f9a7cbbf | 2842 | static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
d29f749e | 2843 | { |
73466498 | 2844 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2845 | } |
2846 | ||
bea3348e SH |
2847 | /** |
2848 | * netif_stop_queue - stop transmitted packets | |
2849 | * @dev: network device | |
2850 | * | |
2851 | * Stop upper layers calling the device hard_start_xmit routine. | |
2852 | * Used for flow control when transmit resources are unavailable. | |
2853 | */ | |
1da177e4 LT |
2854 | static inline void netif_stop_queue(struct net_device *dev) |
2855 | { | |
e8a0464c | 2856 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2857 | } |
2858 | ||
a2029240 | 2859 | void netif_tx_stop_all_queues(struct net_device *dev); |
fd2ea0a7 | 2860 | |
4d29515f | 2861 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 2862 | { |
73466498 | 2863 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
2864 | } |
2865 | ||
bea3348e SH |
2866 | /** |
2867 | * netif_queue_stopped - test if transmit queue is flowblocked | |
2868 | * @dev: network device | |
2869 | * | |
2870 | * Test if transmit queue on device is currently unable to send. | |
2871 | */ | |
4d29515f | 2872 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 2873 | { |
e8a0464c | 2874 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
2875 | } |
2876 | ||
4d29515f | 2877 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 2878 | { |
73466498 TH |
2879 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2880 | } | |
2881 | ||
8e2f1a63 DB |
2882 | static inline bool |
2883 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) | |
73466498 TH |
2884 | { |
2885 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
2886 | } | |
2887 | ||
8e2f1a63 DB |
2888 | static inline bool |
2889 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) | |
2890 | { | |
2891 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; | |
2892 | } | |
2893 | ||
53511453 ED |
2894 | /** |
2895 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write | |
2896 | * @dev_queue: pointer to transmit queue | |
2897 | * | |
2898 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), | |
5e82b4b2 | 2899 | * to give appropriate hint to the CPU. |
53511453 ED |
2900 | */ |
2901 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) | |
2902 | { | |
2903 | #ifdef CONFIG_BQL | |
2904 | prefetchw(&dev_queue->dql.num_queued); | |
2905 | #endif | |
2906 | } | |
2907 | ||
2908 | /** | |
2909 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write | |
2910 | * @dev_queue: pointer to transmit queue | |
2911 | * | |
2912 | * BQL enabled drivers might use this helper in their TX completion path, | |
5e82b4b2 | 2913 | * to give appropriate hint to the CPU. |
53511453 ED |
2914 | */ |
2915 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) | |
2916 | { | |
2917 | #ifdef CONFIG_BQL | |
2918 | prefetchw(&dev_queue->dql.limit); | |
2919 | #endif | |
2920 | } | |
2921 | ||
c5d67bd7 TH |
2922 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2923 | unsigned int bytes) | |
2924 | { | |
114cf580 TH |
2925 | #ifdef CONFIG_BQL |
2926 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
2927 | |
2928 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
2929 | return; | |
2930 | ||
2931 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
2932 | ||
2933 | /* | |
2934 | * The XOFF flag must be set before checking the dql_avail below, | |
2935 | * because in netdev_tx_completed_queue we update the dql_completed | |
2936 | * before checking the XOFF flag. | |
2937 | */ | |
2938 | smp_mb(); | |
2939 | ||
2940 | /* check again in case another CPU has just made room avail */ | |
2941 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
2942 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 2943 | #endif |
c5d67bd7 TH |
2944 | } |
2945 | ||
0042d0c8 FF |
2946 | /** |
2947 | * netdev_sent_queue - report the number of bytes queued to hardware | |
2948 | * @dev: network device | |
2949 | * @bytes: number of bytes queued to the hardware device queue | |
2950 | * | |
2951 | * Report the number of bytes queued for sending/completion to the network | |
2952 | * device hardware queue. @bytes should be a good approximation and should | |
2953 | * exactly match netdev_completed_queue() @bytes | |
2954 | */ | |
c5d67bd7 TH |
2955 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2956 | { | |
2957 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
2958 | } | |
2959 | ||
2960 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 2961 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 2962 | { |
114cf580 | 2963 | #ifdef CONFIG_BQL |
b37c0fbe AD |
2964 | if (unlikely(!bytes)) |
2965 | return; | |
2966 | ||
2967 | dql_completed(&dev_queue->dql, bytes); | |
2968 | ||
2969 | /* | |
2970 | * Without the memory barrier there is a small possiblity that | |
2971 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
2972 | * be stopped forever | |
2973 | */ | |
2974 | smp_mb(); | |
2975 | ||
2976 | if (dql_avail(&dev_queue->dql) < 0) | |
2977 | return; | |
2978 | ||
2979 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
2980 | netif_schedule_queue(dev_queue); | |
114cf580 | 2981 | #endif |
c5d67bd7 TH |
2982 | } |
2983 | ||
0042d0c8 FF |
2984 | /** |
2985 | * netdev_completed_queue - report bytes and packets completed by device | |
2986 | * @dev: network device | |
2987 | * @pkts: actual number of packets sent over the medium | |
2988 | * @bytes: actual number of bytes sent over the medium | |
2989 | * | |
2990 | * Report the number of bytes and packets transmitted by the network device | |
2991 | * hardware queue over the physical medium, @bytes must exactly match the | |
2992 | * @bytes amount passed to netdev_sent_queue() | |
2993 | */ | |
c5d67bd7 | 2994 | static inline void netdev_completed_queue(struct net_device *dev, |
95c96174 | 2995 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
2996 | { |
2997 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
2998 | } | |
2999 | ||
3000 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
3001 | { | |
114cf580 | 3002 | #ifdef CONFIG_BQL |
5c490354 | 3003 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
3004 | dql_reset(&q->dql); |
3005 | #endif | |
c5d67bd7 TH |
3006 | } |
3007 | ||
0042d0c8 FF |
3008 | /** |
3009 | * netdev_reset_queue - reset the packets and bytes count of a network device | |
3010 | * @dev_queue: network device | |
3011 | * | |
3012 | * Reset the bytes and packet count of a network device and clear the | |
3013 | * software flow control OFF bit for this network device | |
3014 | */ | |
c5d67bd7 TH |
3015 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
3016 | { | |
3017 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
3018 | } |
3019 | ||
b9507bda DB |
3020 | /** |
3021 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues | |
3022 | * @dev: network device | |
3023 | * @queue_index: given tx queue index | |
3024 | * | |
3025 | * Returns 0 if given tx queue index >= number of device tx queues, | |
3026 | * otherwise returns the originally passed tx queue index. | |
3027 | */ | |
3028 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) | |
3029 | { | |
3030 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { | |
3031 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n", | |
3032 | dev->name, queue_index, | |
3033 | dev->real_num_tx_queues); | |
3034 | return 0; | |
3035 | } | |
3036 | ||
3037 | return queue_index; | |
3038 | } | |
3039 | ||
bea3348e SH |
3040 | /** |
3041 | * netif_running - test if up | |
3042 | * @dev: network device | |
3043 | * | |
3044 | * Test if the device has been brought up. | |
3045 | */ | |
4d29515f | 3046 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
3047 | { |
3048 | return test_bit(__LINK_STATE_START, &dev->state); | |
3049 | } | |
3050 | ||
f25f4e44 | 3051 | /* |
5e82b4b2 | 3052 | * Routines to manage the subqueues on a device. We only need start, |
f25f4e44 PWJ |
3053 | * stop, and a check if it's stopped. All other device management is |
3054 | * done at the overall netdevice level. | |
3055 | * Also test the device if we're multiqueue. | |
3056 | */ | |
bea3348e SH |
3057 | |
3058 | /** | |
3059 | * netif_start_subqueue - allow sending packets on subqueue | |
3060 | * @dev: network device | |
3061 | * @queue_index: sub queue index | |
3062 | * | |
3063 | * Start individual transmit queue of a device with multiple transmit queues. | |
3064 | */ | |
f25f4e44 PWJ |
3065 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
3066 | { | |
fd2ea0a7 | 3067 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3068 | |
3069 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
3070 | } |
3071 | ||
bea3348e SH |
3072 | /** |
3073 | * netif_stop_subqueue - stop sending packets on subqueue | |
3074 | * @dev: network device | |
3075 | * @queue_index: sub queue index | |
3076 | * | |
3077 | * Stop individual transmit queue of a device with multiple transmit queues. | |
3078 | */ | |
f25f4e44 PWJ |
3079 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
3080 | { | |
fd2ea0a7 | 3081 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f | 3082 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
3083 | } |
3084 | ||
bea3348e SH |
3085 | /** |
3086 | * netif_subqueue_stopped - test status of subqueue | |
3087 | * @dev: network device | |
3088 | * @queue_index: sub queue index | |
3089 | * | |
3090 | * Check individual transmit queue of a device with multiple transmit queues. | |
3091 | */ | |
4d29515f DM |
3092 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
3093 | u16 queue_index) | |
f25f4e44 | 3094 | { |
fd2ea0a7 | 3095 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
3096 | |
3097 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
3098 | } |
3099 | ||
4d29515f DM |
3100 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
3101 | struct sk_buff *skb) | |
668f895a PE |
3102 | { |
3103 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
3104 | } | |
bea3348e | 3105 | |
738b35cc FF |
3106 | /** |
3107 | * netif_wake_subqueue - allow sending packets on subqueue | |
3108 | * @dev: network device | |
3109 | * @queue_index: sub queue index | |
3110 | * | |
3111 | * Resume individual transmit queue of a device with multiple transmit queues. | |
3112 | */ | |
3113 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) | |
3114 | { | |
3115 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); | |
3116 | ||
3117 | netif_tx_wake_queue(txq); | |
3118 | } | |
f25f4e44 | 3119 | |
537c00de | 3120 | #ifdef CONFIG_XPS |
53af53ae | 3121 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
f629d208 | 3122 | u16 index); |
537c00de AD |
3123 | #else |
3124 | static inline int netif_set_xps_queue(struct net_device *dev, | |
3573540c | 3125 | const struct cpumask *mask, |
537c00de AD |
3126 | u16 index) |
3127 | { | |
3128 | return 0; | |
3129 | } | |
3130 | #endif | |
3131 | ||
5605c762 JP |
3132 | u16 __skb_tx_hash(const struct net_device *dev, struct sk_buff *skb, |
3133 | unsigned int num_tx_queues); | |
3134 | ||
a3d22a68 VZ |
3135 | /* |
3136 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
3137 | * as a distribution range limit for the returned value. | |
3138 | */ | |
3139 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
0e001614 | 3140 | struct sk_buff *skb) |
a3d22a68 VZ |
3141 | { |
3142 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
3143 | } | |
3144 | ||
bea3348e SH |
3145 | /** |
3146 | * netif_is_multiqueue - test if device has multiple transmit queues | |
3147 | * @dev: network device | |
3148 | * | |
3149 | * Check if device has multiple transmit queues | |
bea3348e | 3150 | */ |
4d29515f | 3151 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 3152 | { |
a02cec21 | 3153 | return dev->num_tx_queues > 1; |
f25f4e44 | 3154 | } |
1da177e4 | 3155 | |
f629d208 | 3156 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
f0796d5c | 3157 | |
a953be53 | 3158 | #ifdef CONFIG_SYSFS |
f629d208 | 3159 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
62fe0b40 BH |
3160 | #else |
3161 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
3162 | unsigned int rxq) | |
3163 | { | |
3164 | return 0; | |
3165 | } | |
3166 | #endif | |
3167 | ||
a953be53 MD |
3168 | #ifdef CONFIG_SYSFS |
3169 | static inline unsigned int get_netdev_rx_queue_index( | |
3170 | struct netdev_rx_queue *queue) | |
3171 | { | |
3172 | struct net_device *dev = queue->dev; | |
3173 | int index = queue - dev->_rx; | |
3174 | ||
3175 | BUG_ON(index >= dev->num_rx_queues); | |
3176 | return index; | |
3177 | } | |
3178 | #endif | |
3179 | ||
16917b87 | 3180 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
f629d208 | 3181 | int netif_get_num_default_rss_queues(void); |
16917b87 | 3182 | |
e6247027 ED |
3183 | enum skb_free_reason { |
3184 | SKB_REASON_CONSUMED, | |
3185 | SKB_REASON_DROPPED, | |
3186 | }; | |
3187 | ||
3188 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); | |
3189 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); | |
1da177e4 | 3190 | |
e6247027 ED |
3191 | /* |
3192 | * It is not allowed to call kfree_skb() or consume_skb() from hardware | |
3193 | * interrupt context or with hardware interrupts being disabled. | |
3194 | * (in_irq() || irqs_disabled()) | |
3195 | * | |
3196 | * We provide four helpers that can be used in following contexts : | |
3197 | * | |
3198 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, | |
3199 | * replacing kfree_skb(skb) | |
3200 | * | |
3201 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. | |
3202 | * Typically used in place of consume_skb(skb) in TX completion path | |
3203 | * | |
3204 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, | |
3205 | * replacing kfree_skb(skb) | |
3206 | * | |
3207 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, | |
3208 | * and consumed a packet. Used in place of consume_skb(skb) | |
1da177e4 | 3209 | */ |
e6247027 ED |
3210 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
3211 | { | |
3212 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); | |
3213 | } | |
3214 | ||
3215 | static inline void dev_consume_skb_irq(struct sk_buff *skb) | |
3216 | { | |
3217 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); | |
3218 | } | |
3219 | ||
3220 | static inline void dev_kfree_skb_any(struct sk_buff *skb) | |
3221 | { | |
3222 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); | |
3223 | } | |
3224 | ||
3225 | static inline void dev_consume_skb_any(struct sk_buff *skb) | |
3226 | { | |
3227 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); | |
3228 | } | |
1da177e4 | 3229 | |
f629d208 JP |
3230 | int netif_rx(struct sk_buff *skb); |
3231 | int netif_rx_ni(struct sk_buff *skb); | |
04eb4489 | 3232 | int netif_receive_skb(struct sk_buff *skb); |
f629d208 JP |
3233 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
3234 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); | |
3235 | struct sk_buff *napi_get_frags(struct napi_struct *napi); | |
3236 | gro_result_t napi_gro_frags(struct napi_struct *napi); | |
bf5a755f JC |
3237 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
3238 | struct packet_offload *gro_find_complete_by_type(__be16 type); | |
76620aaf HX |
3239 | |
3240 | static inline void napi_free_frags(struct napi_struct *napi) | |
3241 | { | |
3242 | kfree_skb(napi->skb); | |
3243 | napi->skb = NULL; | |
3244 | } | |
3245 | ||
24b27fc4 | 3246 | bool netdev_is_rx_handler_busy(struct net_device *dev); |
f629d208 JP |
3247 | int netdev_rx_handler_register(struct net_device *dev, |
3248 | rx_handler_func_t *rx_handler, | |
3249 | void *rx_handler_data); | |
3250 | void netdev_rx_handler_unregister(struct net_device *dev); | |
3251 | ||
3252 | bool dev_valid_name(const char *name); | |
3253 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); | |
3254 | int dev_ethtool(struct net *net, struct ifreq *); | |
3255 | unsigned int dev_get_flags(const struct net_device *); | |
3256 | int __dev_change_flags(struct net_device *, unsigned int flags); | |
3257 | int dev_change_flags(struct net_device *, unsigned int); | |
cb178190 DM |
3258 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
3259 | unsigned int gchanges); | |
f629d208 JP |
3260 | int dev_change_name(struct net_device *, const char *); |
3261 | int dev_set_alias(struct net_device *, const char *, size_t); | |
3262 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); | |
3263 | int dev_set_mtu(struct net_device *, int); | |
3264 | void dev_set_group(struct net_device *, int); | |
3265 | int dev_set_mac_address(struct net_device *, struct sockaddr *); | |
3266 | int dev_change_carrier(struct net_device *, bool new_carrier); | |
3267 | int dev_get_phys_port_id(struct net_device *dev, | |
02637fce | 3268 | struct netdev_phys_item_id *ppid); |
db24a904 DA |
3269 | int dev_get_phys_port_name(struct net_device *dev, |
3270 | char *name, size_t len); | |
d746d707 | 3271 | int dev_change_proto_down(struct net_device *dev, bool proto_down); |
85de8576 | 3272 | int dev_change_xdp_fd(struct net_device *dev, int fd, u32 flags); |
55a93b3e | 3273 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev); |
ce93718f DM |
3274 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
3275 | struct netdev_queue *txq, int *ret); | |
a0265d28 | 3276 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f629d208 | 3277 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
f4b05d27 NA |
3278 | bool is_skb_forwardable(const struct net_device *dev, |
3279 | const struct sk_buff *skb); | |
1da177e4 | 3280 | |
4e3264d2 MKL |
3281 | static __always_inline int ____dev_forward_skb(struct net_device *dev, |
3282 | struct sk_buff *skb) | |
3283 | { | |
3284 | if (skb_orphan_frags(skb, GFP_ATOMIC) || | |
3285 | unlikely(!is_skb_forwardable(dev, skb))) { | |
3286 | atomic_long_inc(&dev->rx_dropped); | |
3287 | kfree_skb(skb); | |
3288 | return NET_RX_DROP; | |
3289 | } | |
3290 | ||
3291 | skb_scrub_packet(skb, true); | |
3292 | skb->priority = 0; | |
3293 | return 0; | |
3294 | } | |
3295 | ||
74b20582 DA |
3296 | void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
3297 | ||
20380731 | 3298 | extern int netdev_budget; |
1da177e4 LT |
3299 | |
3300 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
f629d208 | 3301 | void netdev_run_todo(void); |
1da177e4 | 3302 | |
bea3348e SH |
3303 | /** |
3304 | * dev_put - release reference to device | |
3305 | * @dev: network device | |
3306 | * | |
9ef4429b | 3307 | * Release reference to device to allow it to be freed. |
bea3348e | 3308 | */ |
1da177e4 LT |
3309 | static inline void dev_put(struct net_device *dev) |
3310 | { | |
933393f5 | 3311 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
3312 | } |
3313 | ||
bea3348e SH |
3314 | /** |
3315 | * dev_hold - get reference to device | |
3316 | * @dev: network device | |
3317 | * | |
9ef4429b | 3318 | * Hold reference to device to keep it from being freed. |
bea3348e | 3319 | */ |
15333061 SH |
3320 | static inline void dev_hold(struct net_device *dev) |
3321 | { | |
933393f5 | 3322 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 3323 | } |
1da177e4 LT |
3324 | |
3325 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
3326 | * and _off may be called from IRQ context, but it is caller | |
3327 | * who is responsible for serialization of these calls. | |
b00055aa SR |
3328 | * |
3329 | * The name carrier is inappropriate, these functions should really be | |
3330 | * called netif_lowerlayer_*() because they represent the state of any | |
3331 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
3332 | */ |
3333 | ||
f629d208 JP |
3334 | void linkwatch_init_dev(struct net_device *dev); |
3335 | void linkwatch_fire_event(struct net_device *dev); | |
3336 | void linkwatch_forget_dev(struct net_device *dev); | |
1da177e4 | 3337 | |
bea3348e SH |
3338 | /** |
3339 | * netif_carrier_ok - test if carrier present | |
3340 | * @dev: network device | |
3341 | * | |
3342 | * Check if carrier is present on device | |
3343 | */ | |
4d29515f | 3344 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
3345 | { |
3346 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
3347 | } | |
3348 | ||
f629d208 | 3349 | unsigned long dev_trans_start(struct net_device *dev); |
9d21493b | 3350 | |
f629d208 | 3351 | void __netdev_watchdog_up(struct net_device *dev); |
1da177e4 | 3352 | |
f629d208 | 3353 | void netif_carrier_on(struct net_device *dev); |
1da177e4 | 3354 | |
f629d208 | 3355 | void netif_carrier_off(struct net_device *dev); |
1da177e4 | 3356 | |
bea3348e SH |
3357 | /** |
3358 | * netif_dormant_on - mark device as dormant. | |
3359 | * @dev: network device | |
3360 | * | |
3361 | * Mark device as dormant (as per RFC2863). | |
3362 | * | |
3363 | * The dormant state indicates that the relevant interface is not | |
3364 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
3365 | * in a "pending" state, waiting for some external event. For "on- | |
3366 | * demand" interfaces, this new state identifies the situation where the | |
3367 | * interface is waiting for events to place it in the up state. | |
bea3348e | 3368 | */ |
b00055aa SR |
3369 | static inline void netif_dormant_on(struct net_device *dev) |
3370 | { | |
3371 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3372 | linkwatch_fire_event(dev); | |
3373 | } | |
3374 | ||
bea3348e SH |
3375 | /** |
3376 | * netif_dormant_off - set device as not dormant. | |
3377 | * @dev: network device | |
3378 | * | |
3379 | * Device is not in dormant state. | |
3380 | */ | |
b00055aa SR |
3381 | static inline void netif_dormant_off(struct net_device *dev) |
3382 | { | |
3383 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
3384 | linkwatch_fire_event(dev); | |
3385 | } | |
3386 | ||
bea3348e SH |
3387 | /** |
3388 | * netif_dormant - test if carrier present | |
3389 | * @dev: network device | |
3390 | * | |
3391 | * Check if carrier is present on device | |
3392 | */ | |
4d29515f | 3393 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
3394 | { |
3395 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
3396 | } | |
3397 | ||
3398 | ||
bea3348e SH |
3399 | /** |
3400 | * netif_oper_up - test if device is operational | |
3401 | * @dev: network device | |
3402 | * | |
3403 | * Check if carrier is operational | |
3404 | */ | |
4d29515f | 3405 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 3406 | { |
b00055aa SR |
3407 | return (dev->operstate == IF_OPER_UP || |
3408 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
3409 | } | |
3410 | ||
bea3348e SH |
3411 | /** |
3412 | * netif_device_present - is device available or removed | |
3413 | * @dev: network device | |
3414 | * | |
3415 | * Check if device has not been removed from system. | |
3416 | */ | |
4d29515f | 3417 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
3418 | { |
3419 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
3420 | } | |
3421 | ||
f629d208 | 3422 | void netif_device_detach(struct net_device *dev); |
1da177e4 | 3423 | |
f629d208 | 3424 | void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
3425 | |
3426 | /* | |
3427 | * Network interface message level settings | |
3428 | */ | |
1da177e4 LT |
3429 | |
3430 | enum { | |
3431 | NETIF_MSG_DRV = 0x0001, | |
3432 | NETIF_MSG_PROBE = 0x0002, | |
3433 | NETIF_MSG_LINK = 0x0004, | |
3434 | NETIF_MSG_TIMER = 0x0008, | |
3435 | NETIF_MSG_IFDOWN = 0x0010, | |
3436 | NETIF_MSG_IFUP = 0x0020, | |
3437 | NETIF_MSG_RX_ERR = 0x0040, | |
3438 | NETIF_MSG_TX_ERR = 0x0080, | |
3439 | NETIF_MSG_TX_QUEUED = 0x0100, | |
3440 | NETIF_MSG_INTR = 0x0200, | |
3441 | NETIF_MSG_TX_DONE = 0x0400, | |
3442 | NETIF_MSG_RX_STATUS = 0x0800, | |
3443 | NETIF_MSG_PKTDATA = 0x1000, | |
3444 | NETIF_MSG_HW = 0x2000, | |
3445 | NETIF_MSG_WOL = 0x4000, | |
3446 | }; | |
3447 | ||
3448 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
3449 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
3450 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
3451 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
3452 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
3453 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
3454 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
3455 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
3456 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
3457 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
3458 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
3459 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
3460 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
3461 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
3462 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
3463 | ||
3464 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
3465 | { | |
3466 | /* use default */ | |
3467 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
3468 | return default_msg_enable_bits; | |
3469 | if (debug_value == 0) /* no output */ | |
3470 | return 0; | |
3471 | /* set low N bits */ | |
3472 | return (1 << debug_value) - 1; | |
3473 | } | |
3474 | ||
c773e847 | 3475 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 3476 | { |
c773e847 DM |
3477 | spin_lock(&txq->_xmit_lock); |
3478 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
3479 | } |
3480 | ||
5a717f4f MT |
3481 | static inline bool __netif_tx_acquire(struct netdev_queue *txq) |
3482 | { | |
3483 | __acquire(&txq->_xmit_lock); | |
3484 | return true; | |
3485 | } | |
3486 | ||
3487 | static inline void __netif_tx_release(struct netdev_queue *txq) | |
3488 | { | |
3489 | __release(&txq->_xmit_lock); | |
3490 | } | |
3491 | ||
fd2ea0a7 DM |
3492 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
3493 | { | |
3494 | spin_lock_bh(&txq->_xmit_lock); | |
3495 | txq->xmit_lock_owner = smp_processor_id(); | |
3496 | } | |
3497 | ||
4d29515f | 3498 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 3499 | { |
4d29515f | 3500 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
3501 | if (likely(ok)) |
3502 | txq->xmit_lock_owner = smp_processor_id(); | |
3503 | return ok; | |
3504 | } | |
3505 | ||
3506 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
3507 | { | |
3508 | txq->xmit_lock_owner = -1; | |
3509 | spin_unlock(&txq->_xmit_lock); | |
3510 | } | |
3511 | ||
3512 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
3513 | { | |
3514 | txq->xmit_lock_owner = -1; | |
3515 | spin_unlock_bh(&txq->_xmit_lock); | |
3516 | } | |
3517 | ||
08baf561 ED |
3518 | static inline void txq_trans_update(struct netdev_queue *txq) |
3519 | { | |
3520 | if (txq->xmit_lock_owner != -1) | |
3521 | txq->trans_start = jiffies; | |
3522 | } | |
3523 | ||
ba162f8e FW |
3524 | /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ |
3525 | static inline void netif_trans_update(struct net_device *dev) | |
3526 | { | |
9b36627a FW |
3527 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
3528 | ||
3529 | if (txq->trans_start != jiffies) | |
3530 | txq->trans_start = jiffies; | |
ba162f8e FW |
3531 | } |
3532 | ||
d29f749e DJ |
3533 | /** |
3534 | * netif_tx_lock - grab network device transmit lock | |
3535 | * @dev: network device | |
d29f749e DJ |
3536 | * |
3537 | * Get network device transmit lock | |
3538 | */ | |
22dd7495 JHS |
3539 | static inline void netif_tx_lock(struct net_device *dev) |
3540 | { | |
e8a0464c | 3541 | unsigned int i; |
c3f26a26 | 3542 | int cpu; |
c773e847 | 3543 | |
c3f26a26 DM |
3544 | spin_lock(&dev->tx_global_lock); |
3545 | cpu = smp_processor_id(); | |
e8a0464c DM |
3546 | for (i = 0; i < dev->num_tx_queues; i++) { |
3547 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3548 | |
3549 | /* We are the only thread of execution doing a | |
3550 | * freeze, but we have to grab the _xmit_lock in | |
3551 | * order to synchronize with threads which are in | |
3552 | * the ->hard_start_xmit() handler and already | |
3553 | * checked the frozen bit. | |
3554 | */ | |
e8a0464c | 3555 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
3556 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
3557 | __netif_tx_unlock(txq); | |
e8a0464c | 3558 | } |
932ff279 HX |
3559 | } |
3560 | ||
3561 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
3562 | { | |
e8a0464c DM |
3563 | local_bh_disable(); |
3564 | netif_tx_lock(dev); | |
932ff279 HX |
3565 | } |
3566 | ||
932ff279 HX |
3567 | static inline void netif_tx_unlock(struct net_device *dev) |
3568 | { | |
e8a0464c DM |
3569 | unsigned int i; |
3570 | ||
3571 | for (i = 0; i < dev->num_tx_queues; i++) { | |
3572 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 3573 | |
c3f26a26 DM |
3574 | /* No need to grab the _xmit_lock here. If the |
3575 | * queue is not stopped for another reason, we | |
3576 | * force a schedule. | |
3577 | */ | |
3578 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 3579 | netif_schedule_queue(txq); |
c3f26a26 DM |
3580 | } |
3581 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
3582 | } |
3583 | ||
3584 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
3585 | { | |
e8a0464c DM |
3586 | netif_tx_unlock(dev); |
3587 | local_bh_enable(); | |
932ff279 HX |
3588 | } |
3589 | ||
c773e847 | 3590 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 3591 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3592 | __netif_tx_lock(txq, cpu); \ |
5a717f4f MT |
3593 | } else { \ |
3594 | __netif_tx_acquire(txq); \ | |
22dd7495 JHS |
3595 | } \ |
3596 | } | |
3597 | ||
5efeac44 EB |
3598 | #define HARD_TX_TRYLOCK(dev, txq) \ |
3599 | (((dev->features & NETIF_F_LLTX) == 0) ? \ | |
3600 | __netif_tx_trylock(txq) : \ | |
5a717f4f | 3601 | __netif_tx_acquire(txq)) |
5efeac44 | 3602 | |
c773e847 | 3603 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 3604 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 3605 | __netif_tx_unlock(txq); \ |
5a717f4f MT |
3606 | } else { \ |
3607 | __netif_tx_release(txq); \ | |
22dd7495 JHS |
3608 | } \ |
3609 | } | |
3610 | ||
1da177e4 LT |
3611 | static inline void netif_tx_disable(struct net_device *dev) |
3612 | { | |
fd2ea0a7 | 3613 | unsigned int i; |
c3f26a26 | 3614 | int cpu; |
fd2ea0a7 | 3615 | |
c3f26a26 DM |
3616 | local_bh_disable(); |
3617 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
3618 | for (i = 0; i < dev->num_tx_queues; i++) { |
3619 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
3620 | |
3621 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 3622 | netif_tx_stop_queue(txq); |
c3f26a26 | 3623 | __netif_tx_unlock(txq); |
fd2ea0a7 | 3624 | } |
c3f26a26 | 3625 | local_bh_enable(); |
1da177e4 LT |
3626 | } |
3627 | ||
e308a5d8 DM |
3628 | static inline void netif_addr_lock(struct net_device *dev) |
3629 | { | |
3630 | spin_lock(&dev->addr_list_lock); | |
3631 | } | |
3632 | ||
2429f7ac JP |
3633 | static inline void netif_addr_lock_nested(struct net_device *dev) |
3634 | { | |
25175ba5 VY |
3635 | int subclass = SINGLE_DEPTH_NESTING; |
3636 | ||
3637 | if (dev->netdev_ops->ndo_get_lock_subclass) | |
3638 | subclass = dev->netdev_ops->ndo_get_lock_subclass(dev); | |
3639 | ||
3640 | spin_lock_nested(&dev->addr_list_lock, subclass); | |
2429f7ac JP |
3641 | } |
3642 | ||
e308a5d8 DM |
3643 | static inline void netif_addr_lock_bh(struct net_device *dev) |
3644 | { | |
3645 | spin_lock_bh(&dev->addr_list_lock); | |
3646 | } | |
3647 | ||
3648 | static inline void netif_addr_unlock(struct net_device *dev) | |
3649 | { | |
3650 | spin_unlock(&dev->addr_list_lock); | |
3651 | } | |
3652 | ||
3653 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
3654 | { | |
3655 | spin_unlock_bh(&dev->addr_list_lock); | |
3656 | } | |
3657 | ||
f001fde5 | 3658 | /* |
31278e71 | 3659 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
3660 | * rcu_read_lock held. |
3661 | */ | |
3662 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 3663 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 3664 | |
1da177e4 LT |
3665 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
3666 | ||
f629d208 | 3667 | void ether_setup(struct net_device *dev); |
1da177e4 LT |
3668 | |
3669 | /* Support for loadable net-drivers */ | |
f629d208 | 3670 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
c835a677 | 3671 | unsigned char name_assign_type, |
f629d208 JP |
3672 | void (*setup)(struct net_device *), |
3673 | unsigned int txqs, unsigned int rxqs); | |
c835a677 TG |
3674 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
3675 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) | |
36909ea4 | 3676 | |
c835a677 TG |
3677 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
3678 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ | |
3679 | count) | |
36909ea4 | 3680 | |
f629d208 JP |
3681 | int register_netdev(struct net_device *dev); |
3682 | void unregister_netdev(struct net_device *dev); | |
f001fde5 | 3683 | |
22bedad3 | 3684 | /* General hardware address lists handling functions */ |
f629d208 JP |
3685 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
3686 | struct netdev_hw_addr_list *from_list, int addr_len); | |
3687 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
3688 | struct netdev_hw_addr_list *from_list, int addr_len); | |
670e5b8e AD |
3689 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
3690 | struct net_device *dev, | |
3691 | int (*sync)(struct net_device *, const unsigned char *), | |
3692 | int (*unsync)(struct net_device *, | |
3693 | const unsigned char *)); | |
3694 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, | |
3695 | struct net_device *dev, | |
3696 | int (*unsync)(struct net_device *, | |
3697 | const unsigned char *)); | |
f629d208 | 3698 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
22bedad3 | 3699 | |
f001fde5 | 3700 | /* Functions used for device addresses handling */ |
f629d208 JP |
3701 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
3702 | unsigned char addr_type); | |
3703 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, | |
3704 | unsigned char addr_type); | |
f629d208 JP |
3705 | void dev_addr_flush(struct net_device *dev); |
3706 | int dev_addr_init(struct net_device *dev); | |
a748ee24 JP |
3707 | |
3708 | /* Functions used for unicast addresses handling */ | |
f629d208 JP |
3709 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
3710 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3711 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); | |
3712 | int dev_uc_sync(struct net_device *to, struct net_device *from); | |
3713 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); | |
3714 | void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
3715 | void dev_uc_flush(struct net_device *dev); | |
3716 | void dev_uc_init(struct net_device *dev); | |
f001fde5 | 3717 | |
670e5b8e AD |
3718 | /** |
3719 | * __dev_uc_sync - Synchonize device's unicast list | |
3720 | * @dev: device to sync | |
3721 | * @sync: function to call if address should be added | |
3722 | * @unsync: function to call if address should be removed | |
3723 | * | |
3724 | * Add newly added addresses to the interface, and release | |
3725 | * addresses that have been deleted. | |
5e82b4b2 | 3726 | */ |
670e5b8e AD |
3727 | static inline int __dev_uc_sync(struct net_device *dev, |
3728 | int (*sync)(struct net_device *, | |
3729 | const unsigned char *), | |
3730 | int (*unsync)(struct net_device *, | |
3731 | const unsigned char *)) | |
3732 | { | |
3733 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); | |
3734 | } | |
3735 | ||
3736 | /** | |
e793c0f7 | 3737 | * __dev_uc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3738 | * @dev: device to sync |
3739 | * @unsync: function to call if address should be removed | |
3740 | * | |
3741 | * Remove all addresses that were added to the device by dev_uc_sync(). | |
5e82b4b2 | 3742 | */ |
670e5b8e AD |
3743 | static inline void __dev_uc_unsync(struct net_device *dev, |
3744 | int (*unsync)(struct net_device *, | |
3745 | const unsigned char *)) | |
3746 | { | |
3747 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); | |
3748 | } | |
3749 | ||
22bedad3 | 3750 | /* Functions used for multicast addresses handling */ |
f629d208 JP |
3751 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
3752 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); | |
3753 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); | |
3754 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); | |
3755 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); | |
3756 | int dev_mc_sync(struct net_device *to, struct net_device *from); | |
3757 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); | |
3758 | void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
3759 | void dev_mc_flush(struct net_device *dev); | |
3760 | void dev_mc_init(struct net_device *dev); | |
f001fde5 | 3761 | |
670e5b8e AD |
3762 | /** |
3763 | * __dev_mc_sync - Synchonize device's multicast list | |
3764 | * @dev: device to sync | |
3765 | * @sync: function to call if address should be added | |
3766 | * @unsync: function to call if address should be removed | |
3767 | * | |
3768 | * Add newly added addresses to the interface, and release | |
3769 | * addresses that have been deleted. | |
5e82b4b2 | 3770 | */ |
670e5b8e AD |
3771 | static inline int __dev_mc_sync(struct net_device *dev, |
3772 | int (*sync)(struct net_device *, | |
3773 | const unsigned char *), | |
3774 | int (*unsync)(struct net_device *, | |
3775 | const unsigned char *)) | |
3776 | { | |
3777 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); | |
3778 | } | |
3779 | ||
3780 | /** | |
e793c0f7 | 3781 | * __dev_mc_unsync - Remove synchronized addresses from device |
670e5b8e AD |
3782 | * @dev: device to sync |
3783 | * @unsync: function to call if address should be removed | |
3784 | * | |
3785 | * Remove all addresses that were added to the device by dev_mc_sync(). | |
5e82b4b2 | 3786 | */ |
670e5b8e AD |
3787 | static inline void __dev_mc_unsync(struct net_device *dev, |
3788 | int (*unsync)(struct net_device *, | |
3789 | const unsigned char *)) | |
3790 | { | |
3791 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); | |
3792 | } | |
3793 | ||
4417da66 | 3794 | /* Functions used for secondary unicast and multicast support */ |
f629d208 JP |
3795 | void dev_set_rx_mode(struct net_device *dev); |
3796 | void __dev_set_rx_mode(struct net_device *dev); | |
3797 | int dev_set_promiscuity(struct net_device *dev, int inc); | |
3798 | int dev_set_allmulti(struct net_device *dev, int inc); | |
3799 | void netdev_state_change(struct net_device *dev); | |
3800 | void netdev_notify_peers(struct net_device *dev); | |
3801 | void netdev_features_change(struct net_device *dev); | |
1da177e4 | 3802 | /* Load a device via the kmod */ |
f629d208 JP |
3803 | void dev_load(struct net *net, const char *name); |
3804 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, | |
3805 | struct rtnl_link_stats64 *storage); | |
3806 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, | |
3807 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 3808 | |
1da177e4 | 3809 | extern int netdev_max_backlog; |
3b098e2d | 3810 | extern int netdev_tstamp_prequeue; |
1da177e4 | 3811 | extern int weight_p; |
3d48b53f MT |
3812 | extern int dev_weight_rx_bias; |
3813 | extern int dev_weight_tx_bias; | |
3814 | extern int dev_rx_weight; | |
3815 | extern int dev_tx_weight; | |
9ff162a8 | 3816 | |
f629d208 | 3817 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
44a40855 VY |
3818 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
3819 | struct list_head **iter); | |
f629d208 JP |
3820 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
3821 | struct list_head **iter); | |
8b5be856 | 3822 | |
44a40855 VY |
3823 | /* iterate through upper list, must be called under RCU read lock */ |
3824 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ | |
3825 | for (iter = &(dev)->adj_list.upper, \ | |
3826 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ | |
3827 | updev; \ | |
3828 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) | |
3829 | ||
1a3f060c DA |
3830 | int netdev_walk_all_upper_dev_rcu(struct net_device *dev, |
3831 | int (*fn)(struct net_device *upper_dev, | |
3832 | void *data), | |
3833 | void *data); | |
3834 | ||
3835 | bool netdev_has_upper_dev_all_rcu(struct net_device *dev, | |
3836 | struct net_device *upper_dev); | |
3837 | ||
f629d208 JP |
3838 | void *netdev_lower_get_next_private(struct net_device *dev, |
3839 | struct list_head **iter); | |
3840 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, | |
3841 | struct list_head **iter); | |
31088a11 VF |
3842 | |
3843 | #define netdev_for_each_lower_private(dev, priv, iter) \ | |
3844 | for (iter = (dev)->adj_list.lower.next, \ | |
3845 | priv = netdev_lower_get_next_private(dev, &(iter)); \ | |
3846 | priv; \ | |
3847 | priv = netdev_lower_get_next_private(dev, &(iter))) | |
3848 | ||
3849 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ | |
3850 | for (iter = &(dev)->adj_list.lower, \ | |
3851 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ | |
3852 | priv; \ | |
3853 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) | |
3854 | ||
4085ebe8 VY |
3855 | void *netdev_lower_get_next(struct net_device *dev, |
3856 | struct list_head **iter); | |
7ce856aa | 3857 | |
4085ebe8 | 3858 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ |
cfdd28be | 3859 | for (iter = (dev)->adj_list.lower.next, \ |
4085ebe8 VY |
3860 | ldev = netdev_lower_get_next(dev, &(iter)); \ |
3861 | ldev; \ | |
3862 | ldev = netdev_lower_get_next(dev, &(iter))) | |
3863 | ||
7ce856aa JP |
3864 | struct net_device *netdev_all_lower_get_next(struct net_device *dev, |
3865 | struct list_head **iter); | |
3866 | struct net_device *netdev_all_lower_get_next_rcu(struct net_device *dev, | |
3867 | struct list_head **iter); | |
3868 | ||
1a3f060c DA |
3869 | int netdev_walk_all_lower_dev(struct net_device *dev, |
3870 | int (*fn)(struct net_device *lower_dev, | |
3871 | void *data), | |
3872 | void *data); | |
3873 | int netdev_walk_all_lower_dev_rcu(struct net_device *dev, | |
3874 | int (*fn)(struct net_device *lower_dev, | |
3875 | void *data), | |
3876 | void *data); | |
3877 | ||
f629d208 | 3878 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
e001bfad | 3879 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
f629d208 JP |
3880 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
3881 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); | |
3882 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); | |
3883 | int netdev_master_upper_dev_link(struct net_device *dev, | |
6dffb044 | 3884 | struct net_device *upper_dev, |
29bf24af | 3885 | void *upper_priv, void *upper_info); |
f629d208 JP |
3886 | void netdev_upper_dev_unlink(struct net_device *dev, |
3887 | struct net_device *upper_dev); | |
5bb025fa | 3888 | void netdev_adjacent_rename_links(struct net_device *dev, char *oldname); |
f629d208 JP |
3889 | void *netdev_lower_dev_get_private(struct net_device *dev, |
3890 | struct net_device *lower_dev); | |
04d48266 JP |
3891 | void netdev_lower_state_changed(struct net_device *lower_dev, |
3892 | void *lower_state_info); | |
18bfb924 JP |
3893 | int netdev_default_l2upper_neigh_construct(struct net_device *dev, |
3894 | struct neighbour *n); | |
3895 | void netdev_default_l2upper_neigh_destroy(struct net_device *dev, | |
3896 | struct neighbour *n); | |
960fb622 ED |
3897 | |
3898 | /* RSS keys are 40 or 52 bytes long */ | |
3899 | #define NETDEV_RSS_KEY_LEN 52 | |
ba905f5e | 3900 | extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly; |
960fb622 ED |
3901 | void netdev_rss_key_fill(void *buffer, size_t len); |
3902 | ||
952fcfd0 | 3903 | int dev_get_nest_level(struct net_device *dev); |
f629d208 JP |
3904 | int skb_checksum_help(struct sk_buff *skb); |
3905 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, | |
3906 | netdev_features_t features, bool tx_path); | |
3907 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, | |
3908 | netdev_features_t features); | |
12b0004d | 3909 | |
61bd3857 MS |
3910 | struct netdev_bonding_info { |
3911 | ifslave slave; | |
3912 | ifbond master; | |
3913 | }; | |
3914 | ||
3915 | struct netdev_notifier_bonding_info { | |
3916 | struct netdev_notifier_info info; /* must be first */ | |
3917 | struct netdev_bonding_info bonding_info; | |
3918 | }; | |
3919 | ||
3920 | void netdev_bonding_info_change(struct net_device *dev, | |
3921 | struct netdev_bonding_info *bonding_info); | |
3922 | ||
12b0004d CW |
3923 | static inline |
3924 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) | |
3925 | { | |
3926 | return __skb_gso_segment(skb, features, true); | |
3927 | } | |
53d6471c | 3928 | __be16 skb_network_protocol(struct sk_buff *skb, int *depth); |
ec5f0615 PS |
3929 | |
3930 | static inline bool can_checksum_protocol(netdev_features_t features, | |
3931 | __be16 protocol) | |
3932 | { | |
c8cd0989 TH |
3933 | if (protocol == htons(ETH_P_FCOE)) |
3934 | return !!(features & NETIF_F_FCOE_CRC); | |
3935 | ||
3936 | /* Assume this is an IP checksum (not SCTP CRC) */ | |
3937 | ||
3938 | if (features & NETIF_F_HW_CSUM) { | |
3939 | /* Can checksum everything */ | |
3940 | return true; | |
3941 | } | |
3942 | ||
3943 | switch (protocol) { | |
3944 | case htons(ETH_P_IP): | |
3945 | return !!(features & NETIF_F_IP_CSUM); | |
3946 | case htons(ETH_P_IPV6): | |
3947 | return !!(features & NETIF_F_IPV6_CSUM); | |
3948 | default: | |
3949 | return false; | |
3950 | } | |
ec5f0615 | 3951 | } |
12b0004d | 3952 | |
fb286bb2 | 3953 | #ifdef CONFIG_BUG |
f629d208 | 3954 | void netdev_rx_csum_fault(struct net_device *dev); |
fb286bb2 HX |
3955 | #else |
3956 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
3957 | { | |
3958 | } | |
3959 | #endif | |
1da177e4 | 3960 | /* rx skb timestamps */ |
f629d208 JP |
3961 | void net_enable_timestamp(void); |
3962 | void net_disable_timestamp(void); | |
1da177e4 | 3963 | |
20380731 | 3964 | #ifdef CONFIG_PROC_FS |
f629d208 | 3965 | int __init dev_proc_init(void); |
900ff8c6 CW |
3966 | #else |
3967 | #define dev_proc_init() 0 | |
20380731 ACM |
3968 | #endif |
3969 | ||
4798248e | 3970 | static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops, |
fa2dbdc2 DM |
3971 | struct sk_buff *skb, struct net_device *dev, |
3972 | bool more) | |
4798248e | 3973 | { |
fa2dbdc2 | 3974 | skb->xmit_more = more ? 1 : 0; |
0b725a2c | 3975 | return ops->ndo_start_xmit(skb, dev); |
4798248e DM |
3976 | } |
3977 | ||
10b3ad8c | 3978 | static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev, |
fa2dbdc2 | 3979 | struct netdev_queue *txq, bool more) |
4798248e DM |
3980 | { |
3981 | const struct net_device_ops *ops = dev->netdev_ops; | |
10b3ad8c | 3982 | int rc; |
4798248e | 3983 | |
fa2dbdc2 | 3984 | rc = __netdev_start_xmit(ops, skb, dev, more); |
10b3ad8c DM |
3985 | if (rc == NETDEV_TX_OK) |
3986 | txq_trans_update(txq); | |
3987 | ||
3988 | return rc; | |
4798248e DM |
3989 | } |
3990 | ||
42a2d923 LT |
3991 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
3992 | const void *ns); | |
3993 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, | |
3994 | const void *ns); | |
58292cbe TH |
3995 | |
3996 | static inline int netdev_class_create_file(struct class_attribute *class_attr) | |
3997 | { | |
3998 | return netdev_class_create_file_ns(class_attr, NULL); | |
3999 | } | |
4000 | ||
4001 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) | |
4002 | { | |
4003 | netdev_class_remove_file_ns(class_attr, NULL); | |
4004 | } | |
b8a9787e | 4005 | |
04600794 JB |
4006 | extern struct kobj_ns_type_operations net_ns_type_operations; |
4007 | ||
f629d208 | 4008 | const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 4009 | |
f629d208 | 4010 | void linkwatch_run_queue(void); |
20380731 | 4011 | |
da08143b MK |
4012 | static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, |
4013 | netdev_features_t f2) | |
4014 | { | |
c8cd0989 TH |
4015 | if ((f1 ^ f2) & NETIF_F_HW_CSUM) { |
4016 | if (f1 & NETIF_F_HW_CSUM) | |
b6a0e72a | 4017 | f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4018 | else |
b6a0e72a | 4019 | f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM); |
c8cd0989 | 4020 | } |
da08143b | 4021 | |
c8cd0989 | 4022 | return f1 & f2; |
da08143b MK |
4023 | } |
4024 | ||
c8f44aff MM |
4025 | static inline netdev_features_t netdev_get_wanted_features( |
4026 | struct net_device *dev) | |
5455c699 MM |
4027 | { |
4028 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
4029 | } | |
c8f44aff MM |
4030 | netdev_features_t netdev_increment_features(netdev_features_t all, |
4031 | netdev_features_t one, netdev_features_t mask); | |
b0ce3508 ED |
4032 | |
4033 | /* Allow TSO being used on stacked device : | |
4034 | * Performing the GSO segmentation before last device | |
4035 | * is a performance improvement. | |
4036 | */ | |
4037 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, | |
4038 | netdev_features_t mask) | |
4039 | { | |
4040 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); | |
4041 | } | |
4042 | ||
6cb6a27c | 4043 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 4044 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 4045 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 4046 | |
fc4a7489 PM |
4047 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
4048 | struct net_device *dev); | |
4049 | ||
e38f3025 TM |
4050 | netdev_features_t passthru_features_check(struct sk_buff *skb, |
4051 | struct net_device *dev, | |
4052 | netdev_features_t features); | |
c1e756bf | 4053 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 4054 | |
4d29515f | 4055 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 4056 | { |
7b748340 | 4057 | netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
4058 | |
4059 | /* check flags correspondence */ | |
4060 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
4061 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
4062 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
4063 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
cbc53e08 | 4064 | BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT)); |
0345e186 MM |
4065 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
4066 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4067 | BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT)); |
4068 | BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT)); | |
7e13318d TH |
4069 | BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT)); |
4070 | BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT)); | |
4b28252c TH |
4071 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT)); |
4072 | BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT)); | |
802ab55a | 4073 | BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT)); |
e585f236 | 4074 | BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT)); |
90017acc | 4075 | BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT)); |
0345e186 | 4076 | |
d6b4991a | 4077 | return (features & feature) == feature; |
576a30eb HX |
4078 | } |
4079 | ||
4d29515f | 4080 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 4081 | { |
278b2513 | 4082 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 4083 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
4084 | } |
4085 | ||
8b86a61d | 4086 | static inline bool netif_needs_gso(struct sk_buff *skb, |
4d29515f | 4087 | netdev_features_t features) |
7967168c | 4088 | { |
fc741216 | 4089 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
4090 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
4091 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
4092 | } |
4093 | ||
82cc1a7a PWJ |
4094 | static inline void netif_set_gso_max_size(struct net_device *dev, |
4095 | unsigned int size) | |
4096 | { | |
4097 | dev->gso_max_size = size; | |
4098 | } | |
4099 | ||
7a7ffbab WCC |
4100 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
4101 | int pulled_hlen, u16 mac_offset, | |
4102 | int mac_len) | |
4103 | { | |
4104 | skb->protocol = protocol; | |
4105 | skb->encapsulation = 1; | |
4106 | skb_push(skb, pulled_hlen); | |
4107 | skb_reset_transport_header(skb); | |
4108 | skb->mac_header = mac_offset; | |
4109 | skb->network_header = skb->mac_header + mac_len; | |
4110 | skb->mac_len = mac_len; | |
4111 | } | |
4112 | ||
3c175784 SD |
4113 | static inline bool netif_is_macsec(const struct net_device *dev) |
4114 | { | |
4115 | return dev->priv_flags & IFF_MACSEC; | |
4116 | } | |
4117 | ||
b618aaa9 | 4118 | static inline bool netif_is_macvlan(const struct net_device *dev) |
a6cc0cfa JF |
4119 | { |
4120 | return dev->priv_flags & IFF_MACVLAN; | |
4121 | } | |
4122 | ||
b618aaa9 | 4123 | static inline bool netif_is_macvlan_port(const struct net_device *dev) |
2f33e7d5 MB |
4124 | { |
4125 | return dev->priv_flags & IFF_MACVLAN_PORT; | |
4126 | } | |
4127 | ||
b618aaa9 | 4128 | static inline bool netif_is_ipvlan(const struct net_device *dev) |
5933fea7 MB |
4129 | { |
4130 | return dev->priv_flags & IFF_IPVLAN_SLAVE; | |
4131 | } | |
4132 | ||
b618aaa9 | 4133 | static inline bool netif_is_ipvlan_port(const struct net_device *dev) |
5933fea7 MB |
4134 | { |
4135 | return dev->priv_flags & IFF_IPVLAN_MASTER; | |
4136 | } | |
4137 | ||
b618aaa9 | 4138 | static inline bool netif_is_bond_master(const struct net_device *dev) |
8a7fbfab | 4139 | { |
4140 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; | |
4141 | } | |
4142 | ||
b618aaa9 | 4143 | static inline bool netif_is_bond_slave(const struct net_device *dev) |
1765a575 JP |
4144 | { |
4145 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
4146 | } | |
4147 | ||
3bdc0eba BG |
4148 | static inline bool netif_supports_nofcs(struct net_device *dev) |
4149 | { | |
4150 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
4151 | } | |
4152 | ||
007979ea | 4153 | static inline bool netif_is_l3_master(const struct net_device *dev) |
4e3c8992 | 4154 | { |
007979ea | 4155 | return dev->priv_flags & IFF_L3MDEV_MASTER; |
4e3c8992 DA |
4156 | } |
4157 | ||
fee6d4c7 DA |
4158 | static inline bool netif_is_l3_slave(const struct net_device *dev) |
4159 | { | |
4160 | return dev->priv_flags & IFF_L3MDEV_SLAVE; | |
4161 | } | |
4162 | ||
0894ae3f JP |
4163 | static inline bool netif_is_bridge_master(const struct net_device *dev) |
4164 | { | |
4165 | return dev->priv_flags & IFF_EBRIDGE; | |
4166 | } | |
4167 | ||
28f9ee22 VY |
4168 | static inline bool netif_is_bridge_port(const struct net_device *dev) |
4169 | { | |
4170 | return dev->priv_flags & IFF_BRIDGE_PORT; | |
4171 | } | |
4172 | ||
35d4e172 JP |
4173 | static inline bool netif_is_ovs_master(const struct net_device *dev) |
4174 | { | |
4175 | return dev->priv_flags & IFF_OPENVSWITCH; | |
4176 | } | |
4177 | ||
b618aaa9 | 4178 | static inline bool netif_is_team_master(const struct net_device *dev) |
c981e421 JP |
4179 | { |
4180 | return dev->priv_flags & IFF_TEAM; | |
4181 | } | |
4182 | ||
b618aaa9 | 4183 | static inline bool netif_is_team_port(const struct net_device *dev) |
f7f019ee JP |
4184 | { |
4185 | return dev->priv_flags & IFF_TEAM_PORT; | |
4186 | } | |
4187 | ||
b618aaa9 | 4188 | static inline bool netif_is_lag_master(const struct net_device *dev) |
7be61833 JP |
4189 | { |
4190 | return netif_is_bond_master(dev) || netif_is_team_master(dev); | |
4191 | } | |
4192 | ||
b618aaa9 | 4193 | static inline bool netif_is_lag_port(const struct net_device *dev) |
e0ba1414 JP |
4194 | { |
4195 | return netif_is_bond_slave(dev) || netif_is_team_port(dev); | |
4196 | } | |
4197 | ||
d4ab4286 KJ |
4198 | static inline bool netif_is_rxfh_configured(const struct net_device *dev) |
4199 | { | |
4200 | return dev->priv_flags & IFF_RXFH_CONFIGURED; | |
4201 | } | |
4202 | ||
02875878 ED |
4203 | /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */ |
4204 | static inline void netif_keep_dst(struct net_device *dev) | |
4205 | { | |
4206 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM); | |
4207 | } | |
4208 | ||
18d3df3e PA |
4209 | /* return true if dev can't cope with mtu frames that need vlan tag insertion */ |
4210 | static inline bool netif_reduces_vlan_mtu(struct net_device *dev) | |
4211 | { | |
4212 | /* TODO: reserve and use an additional IFF bit, if we get more users */ | |
4213 | return dev->priv_flags & IFF_MACSEC; | |
4214 | } | |
4215 | ||
505d4f73 | 4216 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 4217 | |
571ba423 JP |
4218 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
4219 | ||
4220 | /* netdev_printk helpers, similar to dev_printk */ | |
4221 | ||
4222 | static inline const char *netdev_name(const struct net_device *dev) | |
4223 | { | |
c6f854d5 VF |
4224 | if (!dev->name[0] || strchr(dev->name, '%')) |
4225 | return "(unnamed net_device)"; | |
571ba423 JP |
4226 | return dev->name; |
4227 | } | |
4228 | ||
ccc7f496 VF |
4229 | static inline const char *netdev_reg_state(const struct net_device *dev) |
4230 | { | |
4231 | switch (dev->reg_state) { | |
4232 | case NETREG_UNINITIALIZED: return " (uninitialized)"; | |
4233 | case NETREG_REGISTERED: return ""; | |
4234 | case NETREG_UNREGISTERING: return " (unregistering)"; | |
4235 | case NETREG_UNREGISTERED: return " (unregistered)"; | |
4236 | case NETREG_RELEASED: return " (released)"; | |
4237 | case NETREG_DUMMY: return " (dummy)"; | |
4238 | } | |
4239 | ||
4240 | WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state); | |
4241 | return " (unknown)"; | |
4242 | } | |
4243 | ||
f629d208 | 4244 | __printf(3, 4) |
6ea754eb JP |
4245 | void netdev_printk(const char *level, const struct net_device *dev, |
4246 | const char *format, ...); | |
f629d208 | 4247 | __printf(2, 3) |
6ea754eb | 4248 | void netdev_emerg(const struct net_device *dev, const char *format, ...); |
f629d208 | 4249 | __printf(2, 3) |
6ea754eb | 4250 | void netdev_alert(const struct net_device *dev, const char *format, ...); |
f629d208 | 4251 | __printf(2, 3) |
6ea754eb | 4252 | void netdev_crit(const struct net_device *dev, const char *format, ...); |
f629d208 | 4253 | __printf(2, 3) |
6ea754eb | 4254 | void netdev_err(const struct net_device *dev, const char *format, ...); |
f629d208 | 4255 | __printf(2, 3) |
6ea754eb | 4256 | void netdev_warn(const struct net_device *dev, const char *format, ...); |
f629d208 | 4257 | __printf(2, 3) |
6ea754eb | 4258 | void netdev_notice(const struct net_device *dev, const char *format, ...); |
f629d208 | 4259 | __printf(2, 3) |
6ea754eb | 4260 | void netdev_info(const struct net_device *dev, const char *format, ...); |
571ba423 | 4261 | |
8909c9ad VK |
4262 | #define MODULE_ALIAS_NETDEV(device) \ |
4263 | MODULE_ALIAS("netdev-" device) | |
4264 | ||
b558c96f | 4265 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
4266 | #define netdev_dbg(__dev, format, args...) \ |
4267 | do { \ | |
ffa10cb4 | 4268 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 4269 | } while (0) |
b558c96f JC |
4270 | #elif defined(DEBUG) |
4271 | #define netdev_dbg(__dev, format, args...) \ | |
4272 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
4273 | #else |
4274 | #define netdev_dbg(__dev, format, args...) \ | |
4275 | ({ \ | |
4276 | if (0) \ | |
4277 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
571ba423 JP |
4278 | }) |
4279 | #endif | |
4280 | ||
4281 | #if defined(VERBOSE_DEBUG) | |
4282 | #define netdev_vdbg netdev_dbg | |
4283 | #else | |
4284 | ||
4285 | #define netdev_vdbg(dev, format, args...) \ | |
4286 | ({ \ | |
4287 | if (0) \ | |
4288 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
4289 | 0; \ | |
4290 | }) | |
4291 | #endif | |
4292 | ||
4293 | /* | |
4294 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
4295 | * of using a WARN/WARN_ON to get the message out, including the | |
4296 | * file/line information and a backtrace. | |
4297 | */ | |
4298 | #define netdev_WARN(dev, format, args...) \ | |
ccc7f496 VF |
4299 | WARN(1, "netdevice: %s%s\n" format, netdev_name(dev), \ |
4300 | netdev_reg_state(dev), ##args) | |
571ba423 | 4301 | |
b3d95c5c JP |
4302 | /* netif printk helpers, similar to netdev_printk */ |
4303 | ||
4304 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
4305 | do { \ | |
4306 | if (netif_msg_##type(priv)) \ | |
4307 | netdev_printk(level, (dev), fmt, ##args); \ | |
4308 | } while (0) | |
4309 | ||
f45f4321 JP |
4310 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
4311 | do { \ | |
4312 | if (netif_msg_##type(priv)) \ | |
4313 | netdev_##level(dev, fmt, ##args); \ | |
4314 | } while (0) | |
4315 | ||
b3d95c5c | 4316 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 4317 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 4318 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 4319 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 4320 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 4321 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 4322 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 4323 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 4324 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 4325 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 4326 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 4327 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 4328 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 4329 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c | 4330 | |
0053ea9c | 4331 | #if defined(CONFIG_DYNAMIC_DEBUG) |
b3d95c5c JP |
4332 | #define netif_dbg(priv, type, netdev, format, args...) \ |
4333 | do { \ | |
4334 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 4335 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c | 4336 | } while (0) |
0053ea9c JP |
4337 | #elif defined(DEBUG) |
4338 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4339 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
b3d95c5c JP |
4340 | #else |
4341 | #define netif_dbg(priv, type, dev, format, args...) \ | |
4342 | ({ \ | |
4343 | if (0) \ | |
4344 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
4345 | 0; \ | |
4346 | }) | |
4347 | #endif | |
4348 | ||
4349 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 4350 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
4351 | #else |
4352 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
4353 | ({ \ | |
4354 | if (0) \ | |
a4ed89cb | 4355 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
4356 | 0; \ |
4357 | }) | |
4358 | #endif | |
571ba423 | 4359 | |
900ff8c6 CW |
4360 | /* |
4361 | * The list of packet types we will receive (as opposed to discard) | |
4362 | * and the routines to invoke. | |
4363 | * | |
4364 | * Why 16. Because with 16 the only overlap we get on a hash of the | |
4365 | * low nibble of the protocol value is RARP/SNAP/X.25. | |
4366 | * | |
4367 | * NOTE: That is no longer true with the addition of VLAN tags. Not | |
4368 | * sure which should go first, but I bet it won't make much | |
4369 | * difference if we are running VLANs. The good news is that | |
4370 | * this protocol won't be in the list unless compiled in, so | |
4371 | * the average user (w/out VLANs) will not be adversely affected. | |
4372 | * --BLG | |
4373 | * | |
4374 | * 0800 IP | |
4375 | * 8100 802.1Q VLAN | |
4376 | * 0001 802.3 | |
4377 | * 0002 AX.25 | |
4378 | * 0004 802.2 | |
4379 | * 8035 RARP | |
4380 | * 0005 SNAP | |
4381 | * 0805 X.25 | |
4382 | * 0806 ARP | |
4383 | * 8137 IPX | |
4384 | * 0009 Localtalk | |
4385 | * 86DD IPv6 | |
4386 | */ | |
4387 | #define PTYPE_HASH_SIZE (16) | |
4388 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) | |
4389 | ||
385a154c | 4390 | #endif /* _LINUX_NETDEVICE_H */ |