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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 | ||
28 | #include <linux/if.h> | |
29 | #include <linux/if_ether.h> | |
30 | #include <linux/if_packet.h> | |
95c26df8 | 31 | #include <linux/if_link.h> |
1da177e4 LT |
32 | |
33 | #ifdef __KERNEL__ | |
e8db0be1 | 34 | #include <linux/pm_qos.h> |
d7fe0f24 | 35 | #include <linux/timer.h> |
187f1882 | 36 | #include <linux/bug.h> |
bea3348e | 37 | #include <linux/delay.h> |
60063497 | 38 | #include <linux/atomic.h> |
1da177e4 LT |
39 | #include <asm/cache.h> |
40 | #include <asm/byteorder.h> | |
41 | ||
1da177e4 | 42 | #include <linux/percpu.h> |
4d5b78c0 | 43 | #include <linux/rculist.h> |
db217334 | 44 | #include <linux/dmaengine.h> |
bea3348e | 45 | #include <linux/workqueue.h> |
114cf580 | 46 | #include <linux/dynamic_queue_limits.h> |
1da177e4 | 47 | |
b1b67dd4 | 48 | #include <linux/ethtool.h> |
a050c33f | 49 | #include <net/net_namespace.h> |
cf85d08f | 50 | #include <net/dsa.h> |
7a6b6f51 | 51 | #ifdef CONFIG_DCB |
2f90b865 AD |
52 | #include <net/dcbnl.h> |
53 | #endif | |
5bc1421e | 54 | #include <net/netprio_cgroup.h> |
a050c33f | 55 | |
a59e2ecb | 56 | #include <linux/netdev_features.h> |
77162022 | 57 | #include <linux/neighbour.h> |
a59e2ecb | 58 | |
115c1d6e | 59 | struct netpoll_info; |
313162d0 | 60 | struct device; |
c1f19b51 | 61 | struct phy_device; |
704232c2 JB |
62 | /* 802.11 specific */ |
63 | struct wireless_dev; | |
1da177e4 LT |
64 | /* source back-compat hooks */ |
65 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
66 | ( (netdev)->ethtool_ops = (ops) ) | |
67 | ||
c1f79426 SA |
68 | /* hardware address assignment types */ |
69 | #define NET_ADDR_PERM 0 /* address is permanent (default) */ | |
70 | #define NET_ADDR_RANDOM 1 /* address is generated randomly */ | |
71 | #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ | |
72 | ||
9a1654ba JP |
73 | /* Backlog congestion levels */ |
74 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
75 | #define NET_RX_DROP 1 /* packet dropped */ | |
76 | ||
572a9d7b PM |
77 | /* |
78 | * Transmit return codes: transmit return codes originate from three different | |
79 | * namespaces: | |
80 | * | |
81 | * - qdisc return codes | |
82 | * - driver transmit return codes | |
83 | * - errno values | |
84 | * | |
85 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
86 | * function. Real network devices commonly used with qdiscs should only return | |
87 | * the driver transmit return codes though - when qdiscs are used, the actual | |
88 | * transmission happens asynchronously, so the value is not propagated to | |
89 | * higher layers. Virtual network devices transmit synchronously, in this case | |
90 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
91 | * others are propagated to higher layers. | |
92 | */ | |
93 | ||
94 | /* qdisc ->enqueue() return codes. */ | |
95 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
96 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
97 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
98 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
99 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 100 | |
b9df3cb8 GR |
101 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
102 | * indicates that the device will soon be dropping packets, or already drops | |
103 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 104 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
105 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
106 | ||
dc1f8bf6 | 107 | /* Driver transmit return codes */ |
9a1654ba | 108 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 109 | |
dc1f8bf6 | 110 | enum netdev_tx { |
572a9d7b | 111 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
112 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
113 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
114 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
115 | }; |
116 | typedef enum netdev_tx netdev_tx_t; | |
117 | ||
9a1654ba JP |
118 | /* |
119 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
120 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
121 | */ | |
122 | static inline bool dev_xmit_complete(int rc) | |
123 | { | |
124 | /* | |
125 | * Positive cases with an skb consumed by a driver: | |
126 | * - successful transmission (rc == NETDEV_TX_OK) | |
127 | * - error while transmitting (rc < 0) | |
128 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
129 | */ | |
130 | if (likely(rc < NET_XMIT_MASK)) | |
131 | return true; | |
132 | ||
133 | return false; | |
134 | } | |
135 | ||
1da177e4 LT |
136 | #endif |
137 | ||
138 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
139 | ||
23b41168 VD |
140 | /* Initial net device group. All devices belong to group 0 by default. */ |
141 | #define INIT_NETDEV_GROUP 0 | |
142 | ||
c88e6f51 | 143 | #ifdef __KERNEL__ |
1da177e4 LT |
144 | /* |
145 | * Compute the worst case header length according to the protocols | |
146 | * used. | |
147 | */ | |
fe2918b0 | 148 | |
d11ead75 | 149 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
8388e3da DM |
150 | # if defined(CONFIG_MAC80211_MESH) |
151 | # define LL_MAX_HEADER 128 | |
152 | # else | |
153 | # define LL_MAX_HEADER 96 | |
154 | # endif | |
d11ead75 | 155 | #elif IS_ENABLED(CONFIG_TR) |
8388e3da | 156 | # define LL_MAX_HEADER 48 |
1da177e4 | 157 | #else |
8388e3da | 158 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
159 | #endif |
160 | ||
d11ead75 BH |
161 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
162 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) | |
1da177e4 LT |
163 | #define MAX_HEADER LL_MAX_HEADER |
164 | #else | |
165 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
166 | #endif | |
167 | ||
168 | /* | |
be1f3c2c BH |
169 | * Old network device statistics. Fields are native words |
170 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 171 | */ |
fe2918b0 | 172 | |
d94d9fee | 173 | struct net_device_stats { |
3cfde79c BH |
174 | unsigned long rx_packets; |
175 | unsigned long tx_packets; | |
176 | unsigned long rx_bytes; | |
177 | unsigned long tx_bytes; | |
178 | unsigned long rx_errors; | |
179 | unsigned long tx_errors; | |
180 | unsigned long rx_dropped; | |
181 | unsigned long tx_dropped; | |
182 | unsigned long multicast; | |
1da177e4 | 183 | unsigned long collisions; |
1da177e4 | 184 | unsigned long rx_length_errors; |
3cfde79c BH |
185 | unsigned long rx_over_errors; |
186 | unsigned long rx_crc_errors; | |
187 | unsigned long rx_frame_errors; | |
188 | unsigned long rx_fifo_errors; | |
189 | unsigned long rx_missed_errors; | |
1da177e4 LT |
190 | unsigned long tx_aborted_errors; |
191 | unsigned long tx_carrier_errors; | |
192 | unsigned long tx_fifo_errors; | |
193 | unsigned long tx_heartbeat_errors; | |
194 | unsigned long tx_window_errors; | |
1da177e4 LT |
195 | unsigned long rx_compressed; |
196 | unsigned long tx_compressed; | |
197 | }; | |
198 | ||
be1f3c2c BH |
199 | #endif /* __KERNEL__ */ |
200 | ||
1da177e4 LT |
201 | |
202 | /* Media selection options. */ | |
203 | enum { | |
204 | IF_PORT_UNKNOWN = 0, | |
205 | IF_PORT_10BASE2, | |
206 | IF_PORT_10BASET, | |
207 | IF_PORT_AUI, | |
208 | IF_PORT_100BASET, | |
209 | IF_PORT_100BASETX, | |
210 | IF_PORT_100BASEFX | |
211 | }; | |
212 | ||
213 | #ifdef __KERNEL__ | |
214 | ||
215 | #include <linux/cache.h> | |
216 | #include <linux/skbuff.h> | |
217 | ||
adc9300e | 218 | #ifdef CONFIG_RPS |
c5905afb IM |
219 | #include <linux/static_key.h> |
220 | extern struct static_key rps_needed; | |
adc9300e ED |
221 | #endif |
222 | ||
1da177e4 LT |
223 | struct neighbour; |
224 | struct neigh_parms; | |
225 | struct sk_buff; | |
226 | ||
f001fde5 JP |
227 | struct netdev_hw_addr { |
228 | struct list_head list; | |
229 | unsigned char addr[MAX_ADDR_LEN]; | |
230 | unsigned char type; | |
ccffad25 JP |
231 | #define NETDEV_HW_ADDR_T_LAN 1 |
232 | #define NETDEV_HW_ADDR_T_SAN 2 | |
233 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
234 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 235 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
ccffad25 | 236 | bool synced; |
22bedad3 | 237 | bool global_use; |
8f8f103d | 238 | int refcount; |
f001fde5 JP |
239 | struct rcu_head rcu_head; |
240 | }; | |
241 | ||
31278e71 JP |
242 | struct netdev_hw_addr_list { |
243 | struct list_head list; | |
244 | int count; | |
245 | }; | |
246 | ||
22bedad3 JP |
247 | #define netdev_hw_addr_list_count(l) ((l)->count) |
248 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
249 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
250 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 251 | |
22bedad3 JP |
252 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
253 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
254 | #define netdev_for_each_uc_addr(ha, dev) \ | |
255 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 256 | |
22bedad3 JP |
257 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
258 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 259 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 260 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 261 | |
d94d9fee | 262 | struct hh_cache { |
f6b72b62 | 263 | u16 hh_len; |
5c25f686 | 264 | u16 __pad; |
3644f0ce | 265 | seqlock_t hh_lock; |
1da177e4 LT |
266 | |
267 | /* cached hardware header; allow for machine alignment needs. */ | |
268 | #define HH_DATA_MOD 16 | |
269 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 270 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
271 | #define HH_DATA_ALIGN(__len) \ |
272 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
273 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
274 | }; | |
275 | ||
276 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
277 | * Alternative is: | |
278 | * dev->hard_header_len ? (dev->hard_header_len + | |
279 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
280 | * | |
281 | * We could use other alignment values, but we must maintain the | |
282 | * relationship HH alignment <= LL alignment. | |
283 | */ | |
284 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 285 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 286 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 287 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 288 | |
3b04ddde SH |
289 | struct header_ops { |
290 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
291 | unsigned short type, const void *daddr, | |
95c96174 | 292 | const void *saddr, unsigned int len); |
3b04ddde SH |
293 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
294 | int (*rebuild)(struct sk_buff *skb); | |
e69dd336 | 295 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
296 | void (*cache_update)(struct hh_cache *hh, |
297 | const struct net_device *dev, | |
298 | const unsigned char *haddr); | |
299 | }; | |
300 | ||
1da177e4 LT |
301 | /* These flag bits are private to the generic network queueing |
302 | * layer, they may not be explicitly referenced by any other | |
303 | * code. | |
304 | */ | |
305 | ||
d94d9fee | 306 | enum netdev_state_t { |
1da177e4 LT |
307 | __LINK_STATE_START, |
308 | __LINK_STATE_PRESENT, | |
1da177e4 | 309 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
310 | __LINK_STATE_LINKWATCH_PENDING, |
311 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
312 | }; |
313 | ||
314 | ||
315 | /* | |
316 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 317 | * are then used in the device probing. |
1da177e4 LT |
318 | */ |
319 | struct netdev_boot_setup { | |
320 | char name[IFNAMSIZ]; | |
321 | struct ifmap map; | |
322 | }; | |
323 | #define NETDEV_BOOT_SETUP_MAX 8 | |
324 | ||
20380731 | 325 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 326 | |
bea3348e SH |
327 | /* |
328 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
329 | */ | |
330 | struct napi_struct { | |
331 | /* The poll_list must only be managed by the entity which | |
332 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
333 | * whoever atomically sets that bit can add this napi_struct | |
334 | * to the per-cpu poll_list, and whoever clears that bit | |
335 | * can remove from the list right before clearing the bit. | |
336 | */ | |
337 | struct list_head poll_list; | |
338 | ||
339 | unsigned long state; | |
340 | int weight; | |
341 | int (*poll)(struct napi_struct *, int); | |
342 | #ifdef CONFIG_NETPOLL | |
343 | spinlock_t poll_lock; | |
344 | int poll_owner; | |
bea3348e | 345 | #endif |
4ae5544f HX |
346 | |
347 | unsigned int gro_count; | |
348 | ||
5d38a079 | 349 | struct net_device *dev; |
d565b0a1 HX |
350 | struct list_head dev_list; |
351 | struct sk_buff *gro_list; | |
5d38a079 | 352 | struct sk_buff *skb; |
bea3348e SH |
353 | }; |
354 | ||
d94d9fee | 355 | enum { |
bea3348e | 356 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 357 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 358 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
bea3348e SH |
359 | }; |
360 | ||
5b252f0c | 361 | enum gro_result { |
d1c76af9 HX |
362 | GRO_MERGED, |
363 | GRO_MERGED_FREE, | |
364 | GRO_HELD, | |
365 | GRO_NORMAL, | |
366 | GRO_DROP, | |
367 | }; | |
5b252f0c | 368 | typedef enum gro_result gro_result_t; |
d1c76af9 | 369 | |
8a4eb573 JP |
370 | /* |
371 | * enum rx_handler_result - Possible return values for rx_handlers. | |
372 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
373 | * further. | |
374 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
375 | * case skb->dev was changed by rx_handler. | |
376 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
377 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
378 | * | |
379 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
380 | * special processing of the skb, prior to delivery to protocol handlers. | |
381 | * | |
382 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
383 | * to register a second rx_handler will return -EBUSY. | |
384 | * | |
385 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
386 | * To unregister a rx_handler on a net_device, use | |
387 | * netdev_rx_handler_unregister(). | |
388 | * | |
389 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
390 | * do with the skb. | |
391 | * | |
392 | * If the rx_handler consumed to skb in some way, it should return | |
393 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
394 | * the skb to be delivered in some other ways. | |
395 | * | |
396 | * If the rx_handler changed skb->dev, to divert the skb to another | |
397 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
398 | * new device will be called if it exists. | |
399 | * | |
400 | * If the rx_handler consider the skb should be ignored, it should return | |
401 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
402 | * are registred on exact device (ptype->dev == skb->dev). | |
403 | * | |
404 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
405 | * delivered, it should return RX_HANDLER_PASS. | |
406 | * | |
407 | * A device without a registered rx_handler will behave as if rx_handler | |
408 | * returned RX_HANDLER_PASS. | |
409 | */ | |
410 | ||
411 | enum rx_handler_result { | |
412 | RX_HANDLER_CONSUMED, | |
413 | RX_HANDLER_ANOTHER, | |
414 | RX_HANDLER_EXACT, | |
415 | RX_HANDLER_PASS, | |
416 | }; | |
417 | typedef enum rx_handler_result rx_handler_result_t; | |
418 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 419 | |
b3c97528 | 420 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 421 | |
4d29515f | 422 | static inline bool napi_disable_pending(struct napi_struct *n) |
a0a46196 DM |
423 | { |
424 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
425 | } | |
426 | ||
bea3348e SH |
427 | /** |
428 | * napi_schedule_prep - check if napi can be scheduled | |
429 | * @n: napi context | |
430 | * | |
431 | * Test if NAPI routine is already running, and if not mark | |
432 | * it as running. This is used as a condition variable | |
a0a46196 DM |
433 | * insure only one NAPI poll instance runs. We also make |
434 | * sure there is no pending NAPI disable. | |
bea3348e | 435 | */ |
4d29515f | 436 | static inline bool napi_schedule_prep(struct napi_struct *n) |
bea3348e | 437 | { |
a0a46196 DM |
438 | return !napi_disable_pending(n) && |
439 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
440 | } |
441 | ||
442 | /** | |
443 | * napi_schedule - schedule NAPI poll | |
444 | * @n: napi context | |
445 | * | |
446 | * Schedule NAPI poll routine to be called if it is not already | |
447 | * running. | |
448 | */ | |
449 | static inline void napi_schedule(struct napi_struct *n) | |
450 | { | |
451 | if (napi_schedule_prep(n)) | |
452 | __napi_schedule(n); | |
453 | } | |
454 | ||
bfe13f54 | 455 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
4d29515f | 456 | static inline bool napi_reschedule(struct napi_struct *napi) |
bfe13f54 RD |
457 | { |
458 | if (napi_schedule_prep(napi)) { | |
459 | __napi_schedule(napi); | |
4d29515f | 460 | return true; |
bfe13f54 | 461 | } |
4d29515f | 462 | return false; |
bfe13f54 RD |
463 | } |
464 | ||
bea3348e SH |
465 | /** |
466 | * napi_complete - NAPI processing complete | |
467 | * @n: napi context | |
468 | * | |
469 | * Mark NAPI processing as complete. | |
470 | */ | |
d565b0a1 HX |
471 | extern void __napi_complete(struct napi_struct *n); |
472 | extern void napi_complete(struct napi_struct *n); | |
bea3348e SH |
473 | |
474 | /** | |
475 | * napi_disable - prevent NAPI from scheduling | |
476 | * @n: napi context | |
477 | * | |
478 | * Stop NAPI from being scheduled on this context. | |
479 | * Waits till any outstanding processing completes. | |
480 | */ | |
481 | static inline void napi_disable(struct napi_struct *n) | |
482 | { | |
a0a46196 | 483 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 484 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 485 | msleep(1); |
a0a46196 | 486 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
487 | } |
488 | ||
489 | /** | |
490 | * napi_enable - enable NAPI scheduling | |
491 | * @n: napi context | |
492 | * | |
493 | * Resume NAPI from being scheduled on this context. | |
494 | * Must be paired with napi_disable. | |
495 | */ | |
496 | static inline void napi_enable(struct napi_struct *n) | |
497 | { | |
498 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
499 | smp_mb__before_clear_bit(); | |
500 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
501 | } | |
502 | ||
c264c3de SH |
503 | #ifdef CONFIG_SMP |
504 | /** | |
505 | * napi_synchronize - wait until NAPI is not running | |
506 | * @n: napi context | |
507 | * | |
508 | * Wait until NAPI is done being scheduled on this context. | |
509 | * Waits till any outstanding processing completes but | |
510 | * does not disable future activations. | |
511 | */ | |
512 | static inline void napi_synchronize(const struct napi_struct *n) | |
513 | { | |
514 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
515 | msleep(1); | |
516 | } | |
517 | #else | |
518 | # define napi_synchronize(n) barrier() | |
519 | #endif | |
520 | ||
d94d9fee | 521 | enum netdev_queue_state_t { |
73466498 TH |
522 | __QUEUE_STATE_DRV_XOFF, |
523 | __QUEUE_STATE_STACK_XOFF, | |
c3f26a26 | 524 | __QUEUE_STATE_FROZEN, |
73466498 TH |
525 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
526 | (1 << __QUEUE_STATE_STACK_XOFF)) | |
527 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ | |
528 | (1 << __QUEUE_STATE_FROZEN)) | |
79d16385 | 529 | }; |
73466498 TH |
530 | /* |
531 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The | |
532 | * netif_tx_* functions below are used to manipulate this flag. The | |
533 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit | |
534 | * queue independently. The netif_xmit_*stopped functions below are called | |
535 | * to check if the queue has been stopped by the driver or stack (either | |
536 | * of the XOFF bits are set in the state). Drivers should not need to call | |
537 | * netif_xmit*stopped functions, they should only be using netif_tx_*. | |
538 | */ | |
79d16385 | 539 | |
bb949fbd | 540 | struct netdev_queue { |
6a321cb3 ED |
541 | /* |
542 | * read mostly part | |
543 | */ | |
bb949fbd | 544 | struct net_device *dev; |
b0e1e646 DM |
545 | struct Qdisc *qdisc; |
546 | struct Qdisc *qdisc_sleeping; | |
ccf5ff69 | 547 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
548 | struct kobject kobj; |
549 | #endif | |
f2cd2d3e ED |
550 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
551 | int numa_node; | |
552 | #endif | |
6a321cb3 ED |
553 | /* |
554 | * write mostly part | |
555 | */ | |
556 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
557 | int xmit_lock_owner; | |
9d21493b ED |
558 | /* |
559 | * please use this field instead of dev->trans_start | |
560 | */ | |
561 | unsigned long trans_start; | |
ccf5ff69 | 562 | |
563 | /* | |
564 | * Number of TX timeouts for this queue | |
565 | * (/sys/class/net/DEV/Q/trans_timeout) | |
566 | */ | |
567 | unsigned long trans_timeout; | |
114cf580 TH |
568 | |
569 | unsigned long state; | |
570 | ||
571 | #ifdef CONFIG_BQL | |
572 | struct dql dql; | |
573 | #endif | |
e8a0464c | 574 | } ____cacheline_aligned_in_smp; |
bb949fbd | 575 | |
f2cd2d3e ED |
576 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
577 | { | |
578 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
579 | return q->numa_node; | |
580 | #else | |
b236da69 | 581 | return NUMA_NO_NODE; |
f2cd2d3e ED |
582 | #endif |
583 | } | |
584 | ||
585 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
586 | { | |
587 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
588 | q->numa_node = node; | |
589 | #endif | |
590 | } | |
591 | ||
df334545 | 592 | #ifdef CONFIG_RPS |
0a9627f2 TH |
593 | /* |
594 | * This structure holds an RPS map which can be of variable length. The | |
595 | * map is an array of CPUs. | |
596 | */ | |
597 | struct rps_map { | |
598 | unsigned int len; | |
599 | struct rcu_head rcu; | |
600 | u16 cpus[0]; | |
601 | }; | |
60b778ce | 602 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
0a9627f2 | 603 | |
fec5e652 | 604 | /* |
c445477d BH |
605 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
606 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
607 | * a hardware filter index. | |
fec5e652 TH |
608 | */ |
609 | struct rps_dev_flow { | |
610 | u16 cpu; | |
c445477d | 611 | u16 filter; |
fec5e652 TH |
612 | unsigned int last_qtail; |
613 | }; | |
c445477d | 614 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
615 | |
616 | /* | |
617 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
618 | */ | |
619 | struct rps_dev_flow_table { | |
620 | unsigned int mask; | |
621 | struct rcu_head rcu; | |
622 | struct work_struct free_work; | |
623 | struct rps_dev_flow flows[0]; | |
624 | }; | |
625 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
60b778ce | 626 | ((_num) * sizeof(struct rps_dev_flow))) |
fec5e652 TH |
627 | |
628 | /* | |
629 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
630 | * on which they were processed by the application (set in recvmsg). | |
631 | */ | |
632 | struct rps_sock_flow_table { | |
633 | unsigned int mask; | |
634 | u16 ents[0]; | |
635 | }; | |
636 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
60b778ce | 637 | ((_num) * sizeof(u16))) |
fec5e652 TH |
638 | |
639 | #define RPS_NO_CPU 0xffff | |
640 | ||
641 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
642 | u32 hash) | |
643 | { | |
644 | if (table && hash) { | |
645 | unsigned int cpu, index = hash & table->mask; | |
646 | ||
647 | /* We only give a hint, preemption can change cpu under us */ | |
648 | cpu = raw_smp_processor_id(); | |
649 | ||
650 | if (table->ents[index] != cpu) | |
651 | table->ents[index] = cpu; | |
652 | } | |
653 | } | |
654 | ||
655 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
656 | u32 hash) | |
657 | { | |
658 | if (table && hash) | |
659 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
660 | } | |
661 | ||
6e3f7faf | 662 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
fec5e652 | 663 | |
c445477d BH |
664 | #ifdef CONFIG_RFS_ACCEL |
665 | extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, | |
666 | u32 flow_id, u16 filter_id); | |
667 | #endif | |
668 | ||
0a9627f2 TH |
669 | /* This structure contains an instance of an RX queue. */ |
670 | struct netdev_rx_queue { | |
6e3f7faf ED |
671 | struct rps_map __rcu *rps_map; |
672 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
673 | struct kobject kobj; | |
fe822240 | 674 | struct net_device *dev; |
0a9627f2 | 675 | } ____cacheline_aligned_in_smp; |
fec5e652 | 676 | #endif /* CONFIG_RPS */ |
d314774c | 677 | |
bf264145 TH |
678 | #ifdef CONFIG_XPS |
679 | /* | |
680 | * This structure holds an XPS map which can be of variable length. The | |
681 | * map is an array of queues. | |
682 | */ | |
683 | struct xps_map { | |
684 | unsigned int len; | |
685 | unsigned int alloc_len; | |
686 | struct rcu_head rcu; | |
687 | u16 queues[0]; | |
688 | }; | |
60b778ce | 689 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
bf264145 TH |
690 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
691 | / sizeof(u16)) | |
692 | ||
693 | /* | |
694 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
695 | */ | |
696 | struct xps_dev_maps { | |
697 | struct rcu_head rcu; | |
a4177869 | 698 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
699 | }; |
700 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
701 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
702 | #endif /* CONFIG_XPS */ | |
703 | ||
4f57c087 JF |
704 | #define TC_MAX_QUEUE 16 |
705 | #define TC_BITMASK 15 | |
706 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
707 | struct netdev_tc_txq { | |
708 | u16 count; | |
709 | u16 offset; | |
710 | }; | |
711 | ||
68bad94e NP |
712 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
713 | /* | |
714 | * This structure is to hold information about the device | |
715 | * configured to run FCoE protocol stack. | |
716 | */ | |
717 | struct netdev_fcoe_hbainfo { | |
718 | char manufacturer[64]; | |
719 | char serial_number[64]; | |
720 | char hardware_version[64]; | |
721 | char driver_version[64]; | |
722 | char optionrom_version[64]; | |
723 | char firmware_version[64]; | |
724 | char model[256]; | |
725 | char model_description[256]; | |
726 | }; | |
727 | #endif | |
728 | ||
d314774c SH |
729 | /* |
730 | * This structure defines the management hooks for network devices. | |
00829823 SH |
731 | * The following hooks can be defined; unless noted otherwise, they are |
732 | * optional and can be filled with a null pointer. | |
d314774c SH |
733 | * |
734 | * int (*ndo_init)(struct net_device *dev); | |
735 | * This function is called once when network device is registered. | |
736 | * The network device can use this to any late stage initializaton | |
737 | * or semantic validattion. It can fail with an error code which will | |
738 | * be propogated back to register_netdev | |
739 | * | |
740 | * void (*ndo_uninit)(struct net_device *dev); | |
741 | * This function is called when device is unregistered or when registration | |
742 | * fails. It is not called if init fails. | |
743 | * | |
744 | * int (*ndo_open)(struct net_device *dev); | |
745 | * This function is called when network device transistions to the up | |
746 | * state. | |
747 | * | |
748 | * int (*ndo_stop)(struct net_device *dev); | |
749 | * This function is called when network device transistions to the down | |
750 | * state. | |
751 | * | |
dc1f8bf6 SH |
752 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
753 | * struct net_device *dev); | |
00829823 | 754 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
755 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
756 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
757 | * Required can not be NULL. |
758 | * | |
759 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
760 | * Called to decide which queue to when device supports multiple | |
761 | * transmit queues. | |
762 | * | |
d314774c SH |
763 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
764 | * This function is called to allow device receiver to make | |
765 | * changes to configuration when multicast or promiscious is enabled. | |
766 | * | |
767 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
768 | * This function is called device changes address list filtering. | |
01789349 JP |
769 | * If driver handles unicast address filtering, it should set |
770 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
771 | * |
772 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
773 | * This function is called when the Media Access Control address | |
37b607c5 | 774 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
775 | * mac address can not be changed. |
776 | * | |
777 | * int (*ndo_validate_addr)(struct net_device *dev); | |
778 | * Test if Media Access Control address is valid for the device. | |
779 | * | |
780 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
781 | * Called when a user request an ioctl which can't be handled by | |
782 | * the generic interface code. If not defined ioctl's return | |
783 | * not supported error code. | |
784 | * | |
785 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
786 | * Used to set network devices bus interface parameters. This interface | |
787 | * is retained for legacy reason, new devices should use the bus | |
788 | * interface (PCI) for low level management. | |
789 | * | |
790 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
791 | * Called when a user wants to change the Maximum Transfer Unit | |
792 | * of a device. If not defined, any request to change MTU will | |
793 | * will return an error. | |
794 | * | |
00829823 | 795 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
796 | * Callback uses when the transmitter has not made any progress |
797 | * for dev->watchdog ticks. | |
798 | * | |
3cfde79c | 799 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 800 | * struct rtnl_link_stats64 *storage); |
d308e38f | 801 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 802 | * Called when a user wants to get the network device usage |
be1f3c2c | 803 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
804 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
805 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 806 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
807 | * (which should normally be dev->stats) and return a pointer to |
808 | * it. The structure may be changed asynchronously only if each | |
809 | * field is written atomically. | |
810 | * 3. Update dev->stats asynchronously and atomically, and define | |
811 | * neither operation. | |
d314774c | 812 | * |
8e586137 | 813 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); |
d314774c SH |
814 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
815 | * this function is called when a VLAN id is registered. | |
816 | * | |
8e586137 | 817 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
d314774c SH |
818 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) |
819 | * this function is called when a VLAN id is unregistered. | |
820 | * | |
821 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
822 | * |
823 | * SR-IOV management functions. | |
824 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
825 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
826 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
5f8444a3 | 827 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
828 | * int (*ndo_get_vf_config)(struct net_device *dev, |
829 | * int vf, struct ifla_vf_info *ivf); | |
57b61080 SF |
830 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
831 | * struct nlattr *port[]); | |
832 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
833 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
834 | * Called to setup 'tc' number of traffic classes in the net device. This | |
835 | * is always called from the stack with the rtnl lock held and netif tx | |
836 | * queues stopped. This allows the netdevice to perform queue management | |
837 | * safely. | |
c445477d | 838 | * |
e9bce845 YZ |
839 | * Fiber Channel over Ethernet (FCoE) offload functions. |
840 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
841 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
842 | * so the underlying device can perform whatever needed configuration or | |
843 | * initialization to support acceleration of FCoE traffic. | |
844 | * | |
845 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
846 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
847 | * so the underlying device can perform whatever needed clean-ups to | |
848 | * stop supporting acceleration of FCoE traffic. | |
849 | * | |
850 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
851 | * struct scatterlist *sgl, unsigned int sgc); | |
852 | * Called when the FCoE Initiator wants to initialize an I/O that | |
853 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
854 | * perform necessary setup and returns 1 to indicate the device is set up | |
855 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
856 | * | |
857 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
858 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
859 | * indicated by the FC exchange id 'xid', so the underlying device can | |
860 | * clean up and reuse resources for later DDP requests. | |
861 | * | |
862 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
863 | * struct scatterlist *sgl, unsigned int sgc); | |
864 | * Called when the FCoE Target wants to initialize an I/O that | |
865 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
866 | * perform necessary setup and returns 1 to indicate the device is set up | |
867 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
868 | * | |
68bad94e NP |
869 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
870 | * struct netdev_fcoe_hbainfo *hbainfo); | |
871 | * Called when the FCoE Protocol stack wants information on the underlying | |
872 | * device. This information is utilized by the FCoE protocol stack to | |
873 | * register attributes with Fiber Channel management service as per the | |
874 | * FC-GS Fabric Device Management Information(FDMI) specification. | |
875 | * | |
e9bce845 YZ |
876 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
877 | * Called when the underlying device wants to override default World Wide | |
878 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
879 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
880 | * protocol stack to use. | |
881 | * | |
c445477d BH |
882 | * RFS acceleration. |
883 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
884 | * u16 rxq_index, u32 flow_id); | |
885 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
886 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
887 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea JP |
888 | * |
889 | * Slave management functions (for bridge, bonding, etc). User should | |
890 | * call netdev_set_master() to set dev->master properly. | |
891 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); | |
892 | * Called to make another netdev an underling. | |
893 | * | |
894 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
895 | * Called to release previously enslaved netdev. | |
5455c699 MM |
896 | * |
897 | * Feature/offload setting functions. | |
c8f44aff MM |
898 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
899 | * netdev_features_t features); | |
5455c699 MM |
900 | * Adjusts the requested feature flags according to device-specific |
901 | * constraints, and returns the resulting flags. Must not modify | |
902 | * the device state. | |
903 | * | |
c8f44aff | 904 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
905 | * Called to update device configuration to new features. Passed |
906 | * feature set might be less than what was returned by ndo_fix_features()). | |
907 | * Must return >0 or -errno if it changed dev->features itself. | |
908 | * | |
77162022 JF |
909 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct net_device *dev, |
910 | * unsigned char *addr, u16 flags) | |
911 | * Adds an FDB entry to dev for addr. | |
912 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct net_device *dev, | |
913 | * unsigned char *addr) | |
914 | * Deletes the FDB entry from dev coresponding to addr. | |
915 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, | |
916 | * struct net_device *dev, int idx) | |
917 | * Used to add FDB entries to dump requests. Implementers should add | |
918 | * entries to skb and update idx with the number of entries. | |
d314774c SH |
919 | */ |
920 | struct net_device_ops { | |
921 | int (*ndo_init)(struct net_device *dev); | |
922 | void (*ndo_uninit)(struct net_device *dev); | |
923 | int (*ndo_open)(struct net_device *dev); | |
924 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 925 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
926 | struct net_device *dev); |
927 | u16 (*ndo_select_queue)(struct net_device *dev, | |
928 | struct sk_buff *skb); | |
d314774c SH |
929 | void (*ndo_change_rx_flags)(struct net_device *dev, |
930 | int flags); | |
d314774c | 931 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
932 | int (*ndo_set_mac_address)(struct net_device *dev, |
933 | void *addr); | |
d314774c | 934 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
935 | int (*ndo_do_ioctl)(struct net_device *dev, |
936 | struct ifreq *ifr, int cmd); | |
d314774c SH |
937 | int (*ndo_set_config)(struct net_device *dev, |
938 | struct ifmap *map); | |
00829823 SH |
939 | int (*ndo_change_mtu)(struct net_device *dev, |
940 | int new_mtu); | |
941 | int (*ndo_neigh_setup)(struct net_device *dev, | |
942 | struct neigh_parms *); | |
d314774c SH |
943 | void (*ndo_tx_timeout) (struct net_device *dev); |
944 | ||
28172739 ED |
945 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
946 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
947 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
948 | ||
8e586137 | 949 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
d314774c | 950 | unsigned short vid); |
8e586137 | 951 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
d314774c SH |
952 | unsigned short vid); |
953 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
d314774c | 954 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 HX |
955 | int (*ndo_netpoll_setup)(struct net_device *dev, |
956 | struct netpoll_info *info); | |
0e34e931 | 957 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
d314774c | 958 | #endif |
95c26df8 WM |
959 | int (*ndo_set_vf_mac)(struct net_device *dev, |
960 | int queue, u8 *mac); | |
961 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
962 | int queue, u16 vlan, u8 qos); | |
963 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
964 | int vf, int rate); | |
5f8444a3 GR |
965 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
966 | int vf, bool setting); | |
95c26df8 WM |
967 | int (*ndo_get_vf_config)(struct net_device *dev, |
968 | int vf, | |
969 | struct ifla_vf_info *ivf); | |
57b61080 SF |
970 | int (*ndo_set_vf_port)(struct net_device *dev, |
971 | int vf, | |
972 | struct nlattr *port[]); | |
973 | int (*ndo_get_vf_port)(struct net_device *dev, | |
974 | int vf, struct sk_buff *skb); | |
4f57c087 | 975 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
d11ead75 | 976 | #if IS_ENABLED(CONFIG_FCOE) |
cb454399 YZ |
977 | int (*ndo_fcoe_enable)(struct net_device *dev); |
978 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
979 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
980 | u16 xid, | |
981 | struct scatterlist *sgl, | |
982 | unsigned int sgc); | |
983 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
984 | u16 xid); | |
6247e086 YZ |
985 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
986 | u16 xid, | |
987 | struct scatterlist *sgl, | |
988 | unsigned int sgc); | |
68bad94e NP |
989 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
990 | struct netdev_fcoe_hbainfo *hbainfo); | |
3c9c36bc BPG |
991 | #endif |
992 | ||
d11ead75 | 993 | #if IS_ENABLED(CONFIG_LIBFCOE) |
df5c7945 YZ |
994 | #define NETDEV_FCOE_WWNN 0 |
995 | #define NETDEV_FCOE_WWPN 1 | |
996 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
997 | u64 *wwn, int type); | |
4d288d57 | 998 | #endif |
3c9c36bc | 999 | |
c445477d BH |
1000 | #ifdef CONFIG_RFS_ACCEL |
1001 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
1002 | const struct sk_buff *skb, | |
1003 | u16 rxq_index, | |
1004 | u32 flow_id); | |
1005 | #endif | |
fbaec0ea JP |
1006 | int (*ndo_add_slave)(struct net_device *dev, |
1007 | struct net_device *slave_dev); | |
1008 | int (*ndo_del_slave)(struct net_device *dev, | |
1009 | struct net_device *slave_dev); | |
c8f44aff MM |
1010 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1011 | netdev_features_t features); | |
5455c699 | 1012 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 1013 | netdev_features_t features); |
da6a8fa0 | 1014 | int (*ndo_neigh_construct)(struct neighbour *n); |
447f2191 | 1015 | void (*ndo_neigh_destroy)(struct neighbour *n); |
77162022 JF |
1016 | |
1017 | int (*ndo_fdb_add)(struct ndmsg *ndm, | |
1018 | struct net_device *dev, | |
1019 | unsigned char *addr, | |
1020 | u16 flags); | |
1021 | int (*ndo_fdb_del)(struct ndmsg *ndm, | |
1022 | struct net_device *dev, | |
1023 | unsigned char *addr); | |
1024 | int (*ndo_fdb_dump)(struct sk_buff *skb, | |
1025 | struct netlink_callback *cb, | |
1026 | struct net_device *dev, | |
1027 | int idx); | |
d314774c SH |
1028 | }; |
1029 | ||
1da177e4 LT |
1030 | /* |
1031 | * The DEVICE structure. | |
1032 | * Actually, this whole structure is a big mistake. It mixes I/O | |
1033 | * data with strictly "high-level" data, and it has to know about | |
1034 | * almost every data structure used in the INET module. | |
1035 | * | |
1036 | * FIXME: cleanup struct net_device such that network protocol info | |
1037 | * moves out. | |
1038 | */ | |
1039 | ||
d94d9fee | 1040 | struct net_device { |
1da177e4 LT |
1041 | |
1042 | /* | |
1043 | * This is the first field of the "visible" part of this structure | |
1044 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
724df615 | 1045 | * of the interface. |
1da177e4 LT |
1046 | */ |
1047 | char name[IFNAMSIZ]; | |
ed77134b | 1048 | |
cc749986 | 1049 | struct pm_qos_request pm_qos_req; |
ed77134b | 1050 | |
9356b8fc ED |
1051 | /* device name hash chain */ |
1052 | struct hlist_node name_hlist; | |
0b815a1a SH |
1053 | /* snmp alias */ |
1054 | char *ifalias; | |
1da177e4 LT |
1055 | |
1056 | /* | |
1057 | * I/O specific fields | |
1058 | * FIXME: Merge these and struct ifmap into one | |
1059 | */ | |
1060 | unsigned long mem_end; /* shared mem end */ | |
1061 | unsigned long mem_start; /* shared mem start */ | |
1062 | unsigned long base_addr; /* device I/O address */ | |
1063 | unsigned int irq; /* device IRQ number */ | |
1064 | ||
1065 | /* | |
1066 | * Some hardware also needs these fields, but they are not | |
1067 | * part of the usual set specified in Space.c. | |
1068 | */ | |
1069 | ||
1da177e4 LT |
1070 | unsigned long state; |
1071 | ||
7562f876 | 1072 | struct list_head dev_list; |
bea3348e | 1073 | struct list_head napi_list; |
44a0873d | 1074 | struct list_head unreg_list; |
1da177e4 | 1075 | |
5455c699 | 1076 | /* currently active device features */ |
c8f44aff | 1077 | netdev_features_t features; |
5455c699 | 1078 | /* user-changeable features */ |
c8f44aff | 1079 | netdev_features_t hw_features; |
5455c699 | 1080 | /* user-requested features */ |
c8f44aff | 1081 | netdev_features_t wanted_features; |
1aac6267 | 1082 | /* mask of features inheritable by VLAN devices */ |
c8f44aff | 1083 | netdev_features_t vlan_features; |
04ed3e74 | 1084 | |
1da177e4 LT |
1085 | /* Interface index. Unique device identifier */ |
1086 | int ifindex; | |
1087 | int iflink; | |
1088 | ||
c45d286e | 1089 | struct net_device_stats stats; |
caf586e5 ED |
1090 | atomic_long_t rx_dropped; /* dropped packets by core network |
1091 | * Do not use this in drivers. | |
1092 | */ | |
1da177e4 | 1093 | |
b86e0280 | 1094 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
1095 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1096 | * See <net/iw_handler.h> for details. Jean II */ | |
1097 | const struct iw_handler_def * wireless_handlers; | |
1098 | /* Instance data managed by the core of Wireless Extensions. */ | |
1099 | struct iw_public_data * wireless_data; | |
b86e0280 | 1100 | #endif |
d314774c SH |
1101 | /* Management operations */ |
1102 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 1103 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 1104 | |
3b04ddde SH |
1105 | /* Hardware header description */ |
1106 | const struct header_ops *header_ops; | |
1107 | ||
b00055aa | 1108 | unsigned int flags; /* interface flags (a la BSD) */ |
3bdc0eba BG |
1109 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
1110 | * See if.h for definitions. */ | |
1da177e4 | 1111 | unsigned short gflags; |
1da177e4 LT |
1112 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1113 | ||
b00055aa SR |
1114 | unsigned char operstate; /* RFC2863 operstate */ |
1115 | unsigned char link_mode; /* mapping policy to operstate */ | |
1116 | ||
bdc220da JP |
1117 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1118 | unsigned char dma; /* DMA channel */ | |
1119 | ||
cd7b5396 | 1120 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
1121 | unsigned short type; /* interface hardware type */ |
1122 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 1123 | |
f5184d26 JB |
1124 | /* extra head- and tailroom the hardware may need, but not in all cases |
1125 | * can this be guaranteed, especially tailroom. Some cases also use | |
1126 | * LL_MAX_HEADER instead to allocate the skb. | |
1127 | */ | |
1128 | unsigned short needed_headroom; | |
1129 | unsigned short needed_tailroom; | |
1130 | ||
1da177e4 | 1131 | /* Interface address info. */ |
a6f9a705 | 1132 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
c1f79426 | 1133 | unsigned char addr_assign_type; /* hw address assignment type */ |
1da177e4 | 1134 | unsigned char addr_len; /* hardware address length */ |
596b9b68 | 1135 | unsigned char neigh_priv_len; |
1da177e4 LT |
1136 | unsigned short dev_id; /* for shared network cards */ |
1137 | ||
ccffad25 | 1138 | spinlock_t addr_list_lock; |
22bedad3 JP |
1139 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1140 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
2d348d1f | 1141 | bool uc_promisc; |
9d45abe1 WC |
1142 | unsigned int promiscuity; |
1143 | unsigned int allmulti; | |
1da177e4 | 1144 | |
1da177e4 LT |
1145 | |
1146 | /* Protocol specific pointers */ | |
65ac6a5f | 1147 | |
d11ead75 | 1148 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
5b9ea6e0 | 1149 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
65ac6a5f | 1150 | #endif |
34a430d7 | 1151 | #if IS_ENABLED(CONFIG_NET_DSA) |
cf50dcc2 | 1152 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
91da11f8 | 1153 | #endif |
1da177e4 | 1154 | void *atalk_ptr; /* AppleTalk link */ |
95ae6b22 | 1155 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
fc766e4c | 1156 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
198caeca | 1157 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1da177e4 LT |
1158 | void *ec_ptr; /* Econet specific data */ |
1159 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
1160 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1161 | assign before registering */ | |
1da177e4 | 1162 | |
9356b8fc | 1163 | /* |
cd13539b | 1164 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1165 | */ |
4dc89133 ED |
1166 | unsigned long last_rx; /* Time of last Rx |
1167 | * This should not be set in | |
1168 | * drivers, unless really needed, | |
1169 | * because network stack (bonding) | |
1170 | * use it if/when necessary, to | |
1171 | * avoid dirtying this cache line. | |
1172 | */ | |
1173 | ||
cd13539b ED |
1174 | struct net_device *master; /* Pointer to master device of a group, |
1175 | * which this device is member of. | |
1176 | */ | |
1177 | ||
9356b8fc | 1178 | /* Interface address info used in eth_type_trans() */ |
f001fde5 JP |
1179 | unsigned char *dev_addr; /* hw address, (before bcast |
1180 | because most packets are | |
1181 | unicast) */ | |
1182 | ||
31278e71 JP |
1183 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1184 | hw addresses */ | |
9356b8fc ED |
1185 | |
1186 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 1187 | |
ccf5ff69 | 1188 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1189 | struct kset *queues_kset; |
ccf5ff69 | 1190 | #endif |
0a9627f2 | 1191 | |
ccf5ff69 | 1192 | #ifdef CONFIG_RPS |
0a9627f2 TH |
1193 | struct netdev_rx_queue *_rx; |
1194 | ||
62fe0b40 | 1195 | /* Number of RX queues allocated at register_netdev() time */ |
0a9627f2 | 1196 | unsigned int num_rx_queues; |
62fe0b40 BH |
1197 | |
1198 | /* Number of RX queues currently active in device */ | |
1199 | unsigned int real_num_rx_queues; | |
c445477d BH |
1200 | |
1201 | #ifdef CONFIG_RFS_ACCEL | |
1202 | /* CPU reverse-mapping for RX completion interrupts, indexed | |
1203 | * by RX queue number. Assigned by driver. This must only be | |
1204 | * set if the ndo_rx_flow_steer operation is defined. */ | |
1205 | struct cpu_rmap *rx_cpu_rmap; | |
1206 | #endif | |
df334545 | 1207 | #endif |
0a9627f2 | 1208 | |
61391cde | 1209 | rx_handler_func_t __rcu *rx_handler; |
1210 | void __rcu *rx_handler_data; | |
e8a0464c | 1211 | |
24824a09 | 1212 | struct netdev_queue __rcu *ingress_queue; |
cd13539b ED |
1213 | |
1214 | /* | |
1215 | * Cache lines mostly used on transmit path | |
1216 | */ | |
e8a0464c | 1217 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
fd2ea0a7 DM |
1218 | |
1219 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 1220 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
1221 | |
1222 | /* Number of TX queues currently active in device */ | |
1223 | unsigned int real_num_tx_queues; | |
1224 | ||
af356afa PM |
1225 | /* root qdisc from userspace point of view */ |
1226 | struct Qdisc *qdisc; | |
1227 | ||
1da177e4 | 1228 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 1229 | spinlock_t tx_global_lock; |
cd13539b | 1230 | |
bf264145 | 1231 | #ifdef CONFIG_XPS |
a4177869 | 1232 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1233 | #endif |
1d24eb48 | 1234 | |
9356b8fc | 1235 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1236 | |
1237 | /* | |
1238 | * trans_start here is expensive for high speed devices on SMP, | |
1239 | * please use netdev_queue->trans_start instead. | |
1240 | */ | |
9356b8fc ED |
1241 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1242 | ||
1243 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1244 | struct timer_list watchdog_timer; | |
1245 | ||
1da177e4 | 1246 | /* Number of references to this device */ |
29b4433d | 1247 | int __percpu *pcpu_refcnt; |
9356b8fc | 1248 | |
1da177e4 LT |
1249 | /* delayed register/unregister */ |
1250 | struct list_head todo_list; | |
1da177e4 LT |
1251 | /* device index hash chain */ |
1252 | struct hlist_node index_hlist; | |
1253 | ||
e014debe | 1254 | struct list_head link_watch_list; |
572a103d | 1255 | |
1da177e4 LT |
1256 | /* register/unregister state machine */ |
1257 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1258 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1259 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1260 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1261 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1262 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1263 | } reg_state:8; |
1264 | ||
1265 | bool dismantle; /* device is going do be freed */ | |
a2835763 PM |
1266 | |
1267 | enum { | |
1268 | RTNL_LINK_INITIALIZED, | |
1269 | RTNL_LINK_INITIALIZING, | |
1270 | } rtnl_link_state:16; | |
1da177e4 | 1271 | |
d314774c SH |
1272 | /* Called from unregister, can be used to call free_netdev */ |
1273 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1274 | |
1da177e4 | 1275 | #ifdef CONFIG_NETPOLL |
115c1d6e | 1276 | struct netpoll_info *npinfo; |
1da177e4 | 1277 | #endif |
eae792b7 | 1278 | |
c346dca1 | 1279 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1280 | /* Network namespace this network device is inside */ |
1281 | struct net *nd_net; | |
c346dca1 | 1282 | #endif |
4a1c5371 | 1283 | |
4951704b | 1284 | /* mid-layer private */ |
a7855c78 ED |
1285 | union { |
1286 | void *ml_priv; | |
1287 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ | |
290b895e | 1288 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
6d81f41c | 1289 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
a7855c78 | 1290 | }; |
eca9ebac | 1291 | /* GARP */ |
3cc77ec7 | 1292 | struct garp_port __rcu *garp_port; |
1da177e4 | 1293 | |
1da177e4 | 1294 | /* class/net/name entry */ |
43cb76d9 | 1295 | struct device dev; |
0c509a6c EB |
1296 | /* space for optional device, statistics, and wireless sysfs groups */ |
1297 | const struct attribute_group *sysfs_groups[4]; | |
38f7b870 PM |
1298 | |
1299 | /* rtnetlink link ops */ | |
1300 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1301 | |
82cc1a7a PWJ |
1302 | /* for setting kernel sock attribute on TCP connection setup */ |
1303 | #define GSO_MAX_SIZE 65536 | |
1304 | unsigned int gso_max_size; | |
d314774c | 1305 | |
7a6b6f51 | 1306 | #ifdef CONFIG_DCB |
2f90b865 | 1307 | /* Data Center Bridging netlink ops */ |
32953543 | 1308 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1309 | #endif |
4f57c087 JF |
1310 | u8 num_tc; |
1311 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1312 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1313 | |
d11ead75 | 1314 | #if IS_ENABLED(CONFIG_FCOE) |
4d288d57 YZ |
1315 | /* max exchange id for FCoE LRO by ddp */ |
1316 | unsigned int fcoe_ddp_xid; | |
5bc1421e NH |
1317 | #endif |
1318 | #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) | |
1319 | struct netprio_map __rcu *priomap; | |
4d288d57 | 1320 | #endif |
c1f19b51 RC |
1321 | /* phy device may attach itself for hardware timestamping */ |
1322 | struct phy_device *phydev; | |
cbda10fa VD |
1323 | |
1324 | /* group the device belongs to */ | |
1325 | int group; | |
1da177e4 | 1326 | }; |
43cb76d9 | 1327 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1328 | |
1329 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1330 | |
4f57c087 JF |
1331 | static inline |
1332 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1333 | { | |
1334 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1335 | } | |
1336 | ||
1337 | static inline | |
1338 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1339 | { | |
1340 | if (tc >= dev->num_tc) | |
1341 | return -EINVAL; | |
1342 | ||
1343 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | static inline | |
1348 | void netdev_reset_tc(struct net_device *dev) | |
1349 | { | |
1350 | dev->num_tc = 0; | |
1351 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1352 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1353 | } | |
1354 | ||
1355 | static inline | |
1356 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1357 | { | |
1358 | if (tc >= dev->num_tc) | |
1359 | return -EINVAL; | |
1360 | ||
1361 | dev->tc_to_txq[tc].count = count; | |
1362 | dev->tc_to_txq[tc].offset = offset; | |
1363 | return 0; | |
1364 | } | |
1365 | ||
1366 | static inline | |
1367 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1368 | { | |
1369 | if (num_tc > TC_MAX_QUEUE) | |
1370 | return -EINVAL; | |
1371 | ||
1372 | dev->num_tc = num_tc; | |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static inline | |
1377 | int netdev_get_num_tc(struct net_device *dev) | |
1378 | { | |
1379 | return dev->num_tc; | |
1380 | } | |
1381 | ||
e8a0464c DM |
1382 | static inline |
1383 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1384 | unsigned int index) | |
1385 | { | |
1386 | return &dev->_tx[index]; | |
1387 | } | |
1388 | ||
1389 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1390 | void (*f)(struct net_device *, | |
1391 | struct netdev_queue *, | |
1392 | void *), | |
1393 | void *arg) | |
1394 | { | |
1395 | unsigned int i; | |
1396 | ||
1397 | for (i = 0; i < dev->num_tx_queues; i++) | |
1398 | f(dev, &dev->_tx[i], arg); | |
1399 | } | |
1400 | ||
c346dca1 YH |
1401 | /* |
1402 | * Net namespace inlines | |
1403 | */ | |
1404 | static inline | |
1405 | struct net *dev_net(const struct net_device *dev) | |
1406 | { | |
c2d9ba9b | 1407 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1408 | } |
1409 | ||
1410 | static inline | |
f5aa23fd | 1411 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1412 | { |
1413 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1414 | release_net(dev->nd_net); |
1415 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1416 | #endif |
1417 | } | |
1418 | ||
cf85d08f LB |
1419 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1420 | { | |
1421 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1422 | if (dev->dsa_ptr != NULL) | |
1423 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1424 | #endif | |
1425 | ||
1426 | return 0; | |
1427 | } | |
1428 | ||
8a83a00b AB |
1429 | #ifndef CONFIG_NET_NS |
1430 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) | |
1431 | { | |
1432 | skb->dev = dev; | |
1433 | } | |
1434 | #else /* CONFIG_NET_NS */ | |
1435 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); | |
1436 | #endif | |
1437 | ||
396138f0 LB |
1438 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1439 | { | |
1440 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1441 | if (dev->dsa_ptr != NULL) | |
1442 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1443 | #endif | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | ||
bea3348e SH |
1448 | /** |
1449 | * netdev_priv - access network device private data | |
1450 | * @dev: network device | |
1451 | * | |
1452 | * Get network device private data | |
1453 | */ | |
6472ce60 | 1454 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1455 | { |
1ce8e7b5 | 1456 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1457 | } |
1458 | ||
1da177e4 LT |
1459 | /* Set the sysfs physical device reference for the network logical device |
1460 | * if set prior to registration will cause a symlink during initialization. | |
1461 | */ | |
43cb76d9 | 1462 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1463 | |
384912ed MH |
1464 | /* Set the sysfs device type for the network logical device to allow |
1465 | * fin grained indentification of different network device types. For | |
1466 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1467 | */ | |
1468 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1469 | ||
3b582cc1 SH |
1470 | /** |
1471 | * netif_napi_add - initialize a napi context | |
1472 | * @dev: network device | |
1473 | * @napi: napi context | |
1474 | * @poll: polling function | |
1475 | * @weight: default weight | |
1476 | * | |
1477 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1478 | * *any* of the other napi related functions. | |
1479 | */ | |
d565b0a1 HX |
1480 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1481 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1482 | |
d8156534 AD |
1483 | /** |
1484 | * netif_napi_del - remove a napi context | |
1485 | * @napi: napi context | |
1486 | * | |
1487 | * netif_napi_del() removes a napi context from the network device napi list | |
1488 | */ | |
d565b0a1 HX |
1489 | void netif_napi_del(struct napi_struct *napi); |
1490 | ||
1491 | struct napi_gro_cb { | |
78a478d0 HX |
1492 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1493 | void *frag0; | |
1494 | ||
7489594c HX |
1495 | /* Length of frag0. */ |
1496 | unsigned int frag0_len; | |
1497 | ||
86911732 HX |
1498 | /* This indicates where we are processing relative to skb->data. */ |
1499 | int data_offset; | |
1500 | ||
d565b0a1 HX |
1501 | /* This is non-zero if the packet may be of the same flow. */ |
1502 | int same_flow; | |
1503 | ||
1504 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1505 | int flush; | |
1506 | ||
1507 | /* Number of segments aggregated. */ | |
1508 | int count; | |
5d38a079 HX |
1509 | |
1510 | /* Free the skb? */ | |
1511 | int free; | |
d565b0a1 HX |
1512 | }; |
1513 | ||
1514 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1515 | |
1da177e4 | 1516 | struct packet_type { |
f2ccd8fa DM |
1517 | __be16 type; /* This is really htons(ether_type). */ |
1518 | struct net_device *dev; /* NULL is wildcarded here */ | |
1519 | int (*func) (struct sk_buff *, | |
1520 | struct net_device *, | |
1521 | struct packet_type *, | |
1522 | struct net_device *); | |
576a30eb | 1523 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1524 | netdev_features_t features); |
a430a43d | 1525 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1526 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1527 | struct sk_buff *skb); | |
1528 | int (*gro_complete)(struct sk_buff *skb); | |
1da177e4 LT |
1529 | void *af_packet_priv; |
1530 | struct list_head list; | |
1531 | }; | |
1532 | ||
1da177e4 LT |
1533 | #include <linux/notifier.h> |
1534 | ||
dcfe1421 AW |
1535 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1536 | * notification exclusion list in rtnetlink_event() when adding new | |
1537 | * types. | |
1538 | */ | |
1539 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
1540 | #define NETDEV_DOWN 0x0002 | |
1541 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
1542 | detected a hardware crash and restarted | |
1543 | - we can use this eg to kick tcp sessions | |
1544 | once done */ | |
1545 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
1546 | #define NETDEV_REGISTER 0x0005 | |
1547 | #define NETDEV_UNREGISTER 0x0006 | |
1548 | #define NETDEV_CHANGEMTU 0x0007 | |
1549 | #define NETDEV_CHANGEADDR 0x0008 | |
1550 | #define NETDEV_GOING_DOWN 0x0009 | |
1551 | #define NETDEV_CHANGENAME 0x000A | |
1552 | #define NETDEV_FEAT_CHANGE 0x000B | |
1553 | #define NETDEV_BONDING_FAILOVER 0x000C | |
1554 | #define NETDEV_PRE_UP 0x000D | |
1555 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
1556 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
1557 | #define NETDEV_POST_INIT 0x0010 | |
1558 | #define NETDEV_UNREGISTER_BATCH 0x0011 | |
1559 | #define NETDEV_RELEASE 0x0012 | |
1560 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
1561 | #define NETDEV_JOIN 0x0014 | |
1562 | ||
1563 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1564 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
1565 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
1566 | ||
1567 | ||
1da177e4 LT |
1568 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1569 | ||
7562f876 | 1570 | |
881d966b EB |
1571 | #define for_each_netdev(net, d) \ |
1572 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1573 | #define for_each_netdev_reverse(net, d) \ |
1574 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1575 | #define for_each_netdev_rcu(net, d) \ |
1576 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1577 | #define for_each_netdev_safe(net, d, n) \ |
1578 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1579 | #define for_each_netdev_continue(net, d) \ | |
1580 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1581 | #define for_each_netdev_continue_rcu(net, d) \ |
1582 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b | 1583 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1584 | |
a050c33f DL |
1585 | static inline struct net_device *next_net_device(struct net_device *dev) |
1586 | { | |
1587 | struct list_head *lh; | |
1588 | struct net *net; | |
1589 | ||
c346dca1 | 1590 | net = dev_net(dev); |
a050c33f DL |
1591 | lh = dev->dev_list.next; |
1592 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1593 | } | |
1594 | ||
ce81b76a ED |
1595 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1596 | { | |
1597 | struct list_head *lh; | |
1598 | struct net *net; | |
1599 | ||
1600 | net = dev_net(dev); | |
ccf43438 | 1601 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
1602 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1603 | } | |
1604 | ||
a050c33f DL |
1605 | static inline struct net_device *first_net_device(struct net *net) |
1606 | { | |
1607 | return list_empty(&net->dev_base_head) ? NULL : | |
1608 | net_device_entry(net->dev_base_head.next); | |
1609 | } | |
7562f876 | 1610 | |
ccf43438 ED |
1611 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1612 | { | |
1613 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
1614 | ||
1615 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1616 | } | |
1617 | ||
1da177e4 LT |
1618 | extern int netdev_boot_setup_check(struct net_device *dev); |
1619 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
941666c2 ED |
1620 | extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
1621 | const char *hwaddr); | |
881d966b EB |
1622 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
1623 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
1624 | extern void dev_add_pack(struct packet_type *pt); |
1625 | extern void dev_remove_pack(struct packet_type *pt); | |
1626 | extern void __dev_remove_pack(struct packet_type *pt); | |
1627 | ||
bb69ae04 ED |
1628 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
1629 | unsigned short mask); | |
881d966b | 1630 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
72c9528b | 1631 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
881d966b | 1632 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1da177e4 LT |
1633 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
1634 | extern int dev_open(struct net_device *dev); | |
1635 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 1636 | extern void dev_disable_lro(struct net_device *dev); |
1da177e4 LT |
1637 | extern int dev_queue_xmit(struct sk_buff *skb); |
1638 | extern int register_netdevice(struct net_device *dev); | |
44a0873d ED |
1639 | extern void unregister_netdevice_queue(struct net_device *dev, |
1640 | struct list_head *head); | |
9b5e383c | 1641 | extern void unregister_netdevice_many(struct list_head *head); |
44a0873d ED |
1642 | static inline void unregister_netdevice(struct net_device *dev) |
1643 | { | |
1644 | unregister_netdevice_queue(dev, NULL); | |
1645 | } | |
1646 | ||
29b4433d | 1647 | extern int netdev_refcnt_read(const struct net_device *dev); |
1da177e4 LT |
1648 | extern void free_netdev(struct net_device *dev); |
1649 | extern void synchronize_net(void); | |
937f1ba5 | 1650 | extern int init_dummy_netdev(struct net_device *dev); |
9d40bbda | 1651 | extern void netdev_resync_ops(struct net_device *dev); |
937f1ba5 | 1652 | |
881d966b EB |
1653 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1654 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
fb699dfd | 1655 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
1da177e4 LT |
1656 | extern int dev_restart(struct net_device *dev); |
1657 | #ifdef CONFIG_NETPOLL_TRAP | |
1658 | extern int netpoll_trap(void); | |
1659 | #endif | |
86911732 HX |
1660 | extern int skb_gro_receive(struct sk_buff **head, |
1661 | struct sk_buff *skb); | |
78a478d0 | 1662 | extern void skb_gro_reset_offset(struct sk_buff *skb); |
86911732 HX |
1663 | |
1664 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1665 | { | |
1666 | return NAPI_GRO_CB(skb)->data_offset; | |
1667 | } | |
1668 | ||
1669 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1670 | { | |
1671 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1672 | } | |
1673 | ||
1674 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1675 | { | |
1676 | NAPI_GRO_CB(skb)->data_offset += len; | |
1677 | } | |
1678 | ||
a5b1cf28 HX |
1679 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1680 | unsigned int offset) | |
86911732 | 1681 | { |
a5b1cf28 HX |
1682 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1683 | } | |
78a478d0 | 1684 | |
a5b1cf28 HX |
1685 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1686 | { | |
1687 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1688 | } | |
78a478d0 | 1689 | |
a5b1cf28 HX |
1690 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1691 | unsigned int offset) | |
1692 | { | |
17dd759c HX |
1693 | if (!pskb_may_pull(skb, hlen)) |
1694 | return NULL; | |
1695 | ||
a5b1cf28 HX |
1696 | NAPI_GRO_CB(skb)->frag0 = NULL; |
1697 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 1698 | return skb->data + offset; |
86911732 | 1699 | } |
1da177e4 | 1700 | |
aa4b9f53 HX |
1701 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1702 | { | |
78d3fd0b | 1703 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
1704 | } |
1705 | ||
36e7b1b8 HX |
1706 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1707 | { | |
78d3fd0b HX |
1708 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1709 | skb_network_offset(skb); | |
36e7b1b8 HX |
1710 | } |
1711 | ||
0c4e8581 SH |
1712 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1713 | unsigned short type, | |
3b04ddde | 1714 | const void *daddr, const void *saddr, |
95c96174 | 1715 | unsigned int len) |
0c4e8581 | 1716 | { |
f1ecfd5d | 1717 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 1718 | return 0; |
3b04ddde SH |
1719 | |
1720 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
1721 | } |
1722 | ||
b95cce35 SH |
1723 | static inline int dev_parse_header(const struct sk_buff *skb, |
1724 | unsigned char *haddr) | |
1725 | { | |
1726 | const struct net_device *dev = skb->dev; | |
1727 | ||
1b83336b | 1728 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 1729 | return 0; |
3b04ddde | 1730 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
1731 | } |
1732 | ||
1da177e4 LT |
1733 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1734 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1735 | static inline int unregister_gifconf(unsigned int family) | |
1736 | { | |
1737 | return register_gifconf(family, NULL); | |
1738 | } | |
1739 | ||
1740 | /* | |
88751275 | 1741 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 1742 | */ |
d94d9fee | 1743 | struct softnet_data { |
37437bb2 | 1744 | struct Qdisc *output_queue; |
a9cbd588 | 1745 | struct Qdisc **output_queue_tailp; |
1da177e4 | 1746 | struct list_head poll_list; |
1da177e4 | 1747 | struct sk_buff *completion_queue; |
6e7676c1 | 1748 | struct sk_buff_head process_queue; |
1da177e4 | 1749 | |
dee42870 | 1750 | /* stats */ |
cd7b5396 DM |
1751 | unsigned int processed; |
1752 | unsigned int time_squeeze; | |
1753 | unsigned int cpu_collision; | |
1754 | unsigned int received_rps; | |
dee42870 | 1755 | |
fd793d89 | 1756 | #ifdef CONFIG_RPS |
88751275 ED |
1757 | struct softnet_data *rps_ipi_list; |
1758 | ||
1759 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 1760 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
1761 | struct softnet_data *rps_ipi_next; |
1762 | unsigned int cpu; | |
fec5e652 | 1763 | unsigned int input_queue_head; |
76cc8b13 | 1764 | unsigned int input_queue_tail; |
1e94d72f | 1765 | #endif |
95c96174 | 1766 | unsigned int dropped; |
0a9627f2 | 1767 | struct sk_buff_head input_pkt_queue; |
bea3348e | 1768 | struct napi_struct backlog; |
1da177e4 LT |
1769 | }; |
1770 | ||
76cc8b13 | 1771 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
1772 | { |
1773 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
1774 | sd->input_queue_head++; |
1775 | #endif | |
1776 | } | |
1777 | ||
1778 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
1779 | unsigned int *qtail) | |
1780 | { | |
1781 | #ifdef CONFIG_RPS | |
1782 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
1783 | #endif |
1784 | } | |
1785 | ||
0a9627f2 | 1786 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 1787 | |
37437bb2 | 1788 | extern void __netif_schedule(struct Qdisc *q); |
1da177e4 | 1789 | |
86d804e1 | 1790 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 1791 | { |
73466498 | 1792 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
37437bb2 | 1793 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
1794 | } |
1795 | ||
fd2ea0a7 DM |
1796 | static inline void netif_tx_schedule_all(struct net_device *dev) |
1797 | { | |
1798 | unsigned int i; | |
1799 | ||
1800 | for (i = 0; i < dev->num_tx_queues; i++) | |
1801 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1802 | } | |
1803 | ||
d29f749e DJ |
1804 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
1805 | { | |
73466498 | 1806 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
1807 | } |
1808 | ||
bea3348e SH |
1809 | /** |
1810 | * netif_start_queue - allow transmit | |
1811 | * @dev: network device | |
1812 | * | |
1813 | * Allow upper layers to call the device hard_start_xmit routine. | |
1814 | */ | |
1da177e4 LT |
1815 | static inline void netif_start_queue(struct net_device *dev) |
1816 | { | |
e8a0464c | 1817 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1818 | } |
1819 | ||
fd2ea0a7 DM |
1820 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
1821 | { | |
1822 | unsigned int i; | |
1823 | ||
1824 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1825 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1826 | netif_tx_start_queue(txq); | |
1827 | } | |
1828 | } | |
1829 | ||
79d16385 | 1830 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1831 | { |
1832 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1833 | if (netpoll_trap()) { |
7b3d3e4f | 1834 | netif_tx_start_queue(dev_queue); |
1da177e4 | 1835 | return; |
5f286e11 | 1836 | } |
1da177e4 | 1837 | #endif |
73466498 | 1838 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
37437bb2 | 1839 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
1840 | } |
1841 | ||
d29f749e DJ |
1842 | /** |
1843 | * netif_wake_queue - restart transmit | |
1844 | * @dev: network device | |
1845 | * | |
1846 | * Allow upper layers to call the device hard_start_xmit routine. | |
1847 | * Used for flow control when transmit resources are available. | |
1848 | */ | |
79d16385 DM |
1849 | static inline void netif_wake_queue(struct net_device *dev) |
1850 | { | |
e8a0464c | 1851 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1852 | } |
1853 | ||
fd2ea0a7 DM |
1854 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
1855 | { | |
1856 | unsigned int i; | |
1857 | ||
1858 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1859 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1860 | netif_tx_wake_queue(txq); | |
1861 | } | |
1862 | } | |
1863 | ||
d29f749e DJ |
1864 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1865 | { | |
18543a64 | 1866 | if (WARN_ON(!dev_queue)) { |
256ee435 | 1867 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
1868 | return; |
1869 | } | |
73466498 | 1870 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
1871 | } |
1872 | ||
bea3348e SH |
1873 | /** |
1874 | * netif_stop_queue - stop transmitted packets | |
1875 | * @dev: network device | |
1876 | * | |
1877 | * Stop upper layers calling the device hard_start_xmit routine. | |
1878 | * Used for flow control when transmit resources are unavailable. | |
1879 | */ | |
1da177e4 LT |
1880 | static inline void netif_stop_queue(struct net_device *dev) |
1881 | { | |
e8a0464c | 1882 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1883 | } |
1884 | ||
fd2ea0a7 DM |
1885 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
1886 | { | |
1887 | unsigned int i; | |
1888 | ||
1889 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1890 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1891 | netif_tx_stop_queue(txq); | |
1892 | } | |
1893 | } | |
1894 | ||
4d29515f | 1895 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
d29f749e | 1896 | { |
73466498 | 1897 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
d29f749e DJ |
1898 | } |
1899 | ||
bea3348e SH |
1900 | /** |
1901 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1902 | * @dev: network device | |
1903 | * | |
1904 | * Test if transmit queue on device is currently unable to send. | |
1905 | */ | |
4d29515f | 1906 | static inline bool netif_queue_stopped(const struct net_device *dev) |
1da177e4 | 1907 | { |
e8a0464c | 1908 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1909 | } |
1910 | ||
4d29515f | 1911 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 1912 | { |
73466498 TH |
1913 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
1914 | } | |
1915 | ||
4d29515f | 1916 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
73466498 TH |
1917 | { |
1918 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; | |
1919 | } | |
1920 | ||
c5d67bd7 TH |
1921 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
1922 | unsigned int bytes) | |
1923 | { | |
114cf580 TH |
1924 | #ifdef CONFIG_BQL |
1925 | dql_queued(&dev_queue->dql, bytes); | |
b37c0fbe AD |
1926 | |
1927 | if (likely(dql_avail(&dev_queue->dql) >= 0)) | |
1928 | return; | |
1929 | ||
1930 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
1931 | ||
1932 | /* | |
1933 | * The XOFF flag must be set before checking the dql_avail below, | |
1934 | * because in netdev_tx_completed_queue we update the dql_completed | |
1935 | * before checking the XOFF flag. | |
1936 | */ | |
1937 | smp_mb(); | |
1938 | ||
1939 | /* check again in case another CPU has just made room avail */ | |
1940 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) | |
1941 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); | |
114cf580 | 1942 | #endif |
c5d67bd7 TH |
1943 | } |
1944 | ||
1945 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) | |
1946 | { | |
1947 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); | |
1948 | } | |
1949 | ||
1950 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, | |
95c96174 | 1951 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 | 1952 | { |
114cf580 | 1953 | #ifdef CONFIG_BQL |
b37c0fbe AD |
1954 | if (unlikely(!bytes)) |
1955 | return; | |
1956 | ||
1957 | dql_completed(&dev_queue->dql, bytes); | |
1958 | ||
1959 | /* | |
1960 | * Without the memory barrier there is a small possiblity that | |
1961 | * netdev_tx_sent_queue will miss the update and cause the queue to | |
1962 | * be stopped forever | |
1963 | */ | |
1964 | smp_mb(); | |
1965 | ||
1966 | if (dql_avail(&dev_queue->dql) < 0) | |
1967 | return; | |
1968 | ||
1969 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) | |
1970 | netif_schedule_queue(dev_queue); | |
114cf580 | 1971 | #endif |
c5d67bd7 TH |
1972 | } |
1973 | ||
1974 | static inline void netdev_completed_queue(struct net_device *dev, | |
95c96174 | 1975 | unsigned int pkts, unsigned int bytes) |
c5d67bd7 TH |
1976 | { |
1977 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); | |
1978 | } | |
1979 | ||
1980 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) | |
1981 | { | |
114cf580 | 1982 | #ifdef CONFIG_BQL |
5c490354 | 1983 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
114cf580 TH |
1984 | dql_reset(&q->dql); |
1985 | #endif | |
c5d67bd7 TH |
1986 | } |
1987 | ||
1988 | static inline void netdev_reset_queue(struct net_device *dev_queue) | |
1989 | { | |
1990 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); | |
c3f26a26 DM |
1991 | } |
1992 | ||
bea3348e SH |
1993 | /** |
1994 | * netif_running - test if up | |
1995 | * @dev: network device | |
1996 | * | |
1997 | * Test if the device has been brought up. | |
1998 | */ | |
4d29515f | 1999 | static inline bool netif_running(const struct net_device *dev) |
1da177e4 LT |
2000 | { |
2001 | return test_bit(__LINK_STATE_START, &dev->state); | |
2002 | } | |
2003 | ||
f25f4e44 PWJ |
2004 | /* |
2005 | * Routines to manage the subqueues on a device. We only need start | |
2006 | * stop, and a check if it's stopped. All other device management is | |
2007 | * done at the overall netdevice level. | |
2008 | * Also test the device if we're multiqueue. | |
2009 | */ | |
bea3348e SH |
2010 | |
2011 | /** | |
2012 | * netif_start_subqueue - allow sending packets on subqueue | |
2013 | * @dev: network device | |
2014 | * @queue_index: sub queue index | |
2015 | * | |
2016 | * Start individual transmit queue of a device with multiple transmit queues. | |
2017 | */ | |
f25f4e44 PWJ |
2018 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2019 | { | |
fd2ea0a7 | 2020 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2021 | |
2022 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
2023 | } |
2024 | ||
bea3348e SH |
2025 | /** |
2026 | * netif_stop_subqueue - stop sending packets on subqueue | |
2027 | * @dev: network device | |
2028 | * @queue_index: sub queue index | |
2029 | * | |
2030 | * Stop individual transmit queue of a device with multiple transmit queues. | |
2031 | */ | |
f25f4e44 PWJ |
2032 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2033 | { | |
fd2ea0a7 | 2034 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
2035 | #ifdef CONFIG_NETPOLL_TRAP |
2036 | if (netpoll_trap()) | |
2037 | return; | |
2038 | #endif | |
7b3d3e4f | 2039 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
2040 | } |
2041 | ||
bea3348e SH |
2042 | /** |
2043 | * netif_subqueue_stopped - test status of subqueue | |
2044 | * @dev: network device | |
2045 | * @queue_index: sub queue index | |
2046 | * | |
2047 | * Check individual transmit queue of a device with multiple transmit queues. | |
2048 | */ | |
4d29515f DM |
2049 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2050 | u16 queue_index) | |
f25f4e44 | 2051 | { |
fd2ea0a7 | 2052 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
2053 | |
2054 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
2055 | } |
2056 | ||
4d29515f DM |
2057 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2058 | struct sk_buff *skb) | |
668f895a PE |
2059 | { |
2060 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
2061 | } | |
bea3348e SH |
2062 | |
2063 | /** | |
2064 | * netif_wake_subqueue - allow sending packets on subqueue | |
2065 | * @dev: network device | |
2066 | * @queue_index: sub queue index | |
2067 | * | |
2068 | * Resume individual transmit queue of a device with multiple transmit queues. | |
2069 | */ | |
f25f4e44 PWJ |
2070 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
2071 | { | |
fd2ea0a7 | 2072 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
2073 | #ifdef CONFIG_NETPOLL_TRAP |
2074 | if (netpoll_trap()) | |
2075 | return; | |
2076 | #endif | |
73466498 | 2077 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
37437bb2 | 2078 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
2079 | } |
2080 | ||
a3d22a68 VZ |
2081 | /* |
2082 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
2083 | * as a distribution range limit for the returned value. | |
2084 | */ | |
2085 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
2086 | const struct sk_buff *skb) | |
2087 | { | |
2088 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
2089 | } | |
2090 | ||
bea3348e SH |
2091 | /** |
2092 | * netif_is_multiqueue - test if device has multiple transmit queues | |
2093 | * @dev: network device | |
2094 | * | |
2095 | * Check if device has multiple transmit queues | |
bea3348e | 2096 | */ |
4d29515f | 2097 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
f25f4e44 | 2098 | { |
a02cec21 | 2099 | return dev->num_tx_queues > 1; |
f25f4e44 | 2100 | } |
1da177e4 | 2101 | |
e6484930 TH |
2102 | extern int netif_set_real_num_tx_queues(struct net_device *dev, |
2103 | unsigned int txq); | |
f0796d5c | 2104 | |
62fe0b40 BH |
2105 | #ifdef CONFIG_RPS |
2106 | extern int netif_set_real_num_rx_queues(struct net_device *dev, | |
2107 | unsigned int rxq); | |
2108 | #else | |
2109 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
2110 | unsigned int rxq) | |
2111 | { | |
2112 | return 0; | |
2113 | } | |
2114 | #endif | |
2115 | ||
3171d026 BH |
2116 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
2117 | const struct net_device *from_dev) | |
2118 | { | |
2119 | netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues); | |
2120 | #ifdef CONFIG_RPS | |
2121 | return netif_set_real_num_rx_queues(to_dev, | |
2122 | from_dev->real_num_rx_queues); | |
2123 | #else | |
2124 | return 0; | |
2125 | #endif | |
2126 | } | |
2127 | ||
1da177e4 | 2128 | /* Use this variant when it is known for sure that it |
0ef47309 ML |
2129 | * is executing from hardware interrupt context or with hardware interrupts |
2130 | * disabled. | |
1da177e4 | 2131 | */ |
bea3348e | 2132 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
2133 | |
2134 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
2135 | * from either hardware interrupt or other context, with hardware interrupts |
2136 | * either disabled or enabled. | |
1da177e4 | 2137 | */ |
56079431 | 2138 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 | 2139 | |
1da177e4 LT |
2140 | extern int netif_rx(struct sk_buff *skb); |
2141 | extern int netif_rx_ni(struct sk_buff *skb); | |
1da177e4 | 2142 | extern int netif_receive_skb(struct sk_buff *skb); |
5b252f0c | 2143 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
96e93eab | 2144 | struct sk_buff *skb); |
c7c4b3b6 BH |
2145 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
2146 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, | |
d565b0a1 | 2147 | struct sk_buff *skb); |
86cac58b | 2148 | extern void napi_gro_flush(struct napi_struct *napi); |
76620aaf | 2149 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
c7c4b3b6 | 2150 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
5b252f0c BH |
2151 | struct sk_buff *skb, |
2152 | gro_result_t ret); | |
76620aaf | 2153 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
c7c4b3b6 | 2154 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
76620aaf HX |
2155 | |
2156 | static inline void napi_free_frags(struct napi_struct *napi) | |
2157 | { | |
2158 | kfree_skb(napi->skb); | |
2159 | napi->skb = NULL; | |
2160 | } | |
2161 | ||
ab95bfe0 | 2162 | extern int netdev_rx_handler_register(struct net_device *dev, |
93e2c32b JP |
2163 | rx_handler_func_t *rx_handler, |
2164 | void *rx_handler_data); | |
ab95bfe0 JP |
2165 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
2166 | ||
95f050bf | 2167 | extern bool dev_valid_name(const char *name); |
881d966b EB |
2168 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
2169 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
95c96174 | 2170 | extern unsigned int dev_get_flags(const struct net_device *); |
bd380811 | 2171 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
95c96174 | 2172 | extern int dev_change_flags(struct net_device *, unsigned int); |
bd380811 | 2173 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
cf04a4c7 | 2174 | extern int dev_change_name(struct net_device *, const char *); |
0b815a1a | 2175 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
ce286d32 EB |
2176 | extern int dev_change_net_namespace(struct net_device *, |
2177 | struct net *, const char *); | |
1da177e4 | 2178 | extern int dev_set_mtu(struct net_device *, int); |
cbda10fa | 2179 | extern void dev_set_group(struct net_device *, int); |
1da177e4 LT |
2180 | extern int dev_set_mac_address(struct net_device *, |
2181 | struct sockaddr *); | |
f6a78bfc | 2182 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
fd2ea0a7 DM |
2183 | struct net_device *dev, |
2184 | struct netdev_queue *txq); | |
44540960 AB |
2185 | extern int dev_forward_skb(struct net_device *dev, |
2186 | struct sk_buff *skb); | |
1da177e4 | 2187 | |
20380731 | 2188 | extern int netdev_budget; |
1da177e4 LT |
2189 | |
2190 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
2191 | extern void netdev_run_todo(void); | |
2192 | ||
bea3348e SH |
2193 | /** |
2194 | * dev_put - release reference to device | |
2195 | * @dev: network device | |
2196 | * | |
9ef4429b | 2197 | * Release reference to device to allow it to be freed. |
bea3348e | 2198 | */ |
1da177e4 LT |
2199 | static inline void dev_put(struct net_device *dev) |
2200 | { | |
933393f5 | 2201 | this_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2202 | } |
2203 | ||
bea3348e SH |
2204 | /** |
2205 | * dev_hold - get reference to device | |
2206 | * @dev: network device | |
2207 | * | |
9ef4429b | 2208 | * Hold reference to device to keep it from being freed. |
bea3348e | 2209 | */ |
15333061 SH |
2210 | static inline void dev_hold(struct net_device *dev) |
2211 | { | |
933393f5 | 2212 | this_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2213 | } |
1da177e4 LT |
2214 | |
2215 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2216 | * and _off may be called from IRQ context, but it is caller | |
2217 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2218 | * |
2219 | * The name carrier is inappropriate, these functions should really be | |
2220 | * called netif_lowerlayer_*() because they represent the state of any | |
2221 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2222 | */ |
2223 | ||
2224 | extern void linkwatch_fire_event(struct net_device *dev); | |
e014debe | 2225 | extern void linkwatch_forget_dev(struct net_device *dev); |
1da177e4 | 2226 | |
bea3348e SH |
2227 | /** |
2228 | * netif_carrier_ok - test if carrier present | |
2229 | * @dev: network device | |
2230 | * | |
2231 | * Check if carrier is present on device | |
2232 | */ | |
4d29515f | 2233 | static inline bool netif_carrier_ok(const struct net_device *dev) |
1da177e4 LT |
2234 | { |
2235 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
2236 | } | |
2237 | ||
9d21493b ED |
2238 | extern unsigned long dev_trans_start(struct net_device *dev); |
2239 | ||
1da177e4 LT |
2240 | extern void __netdev_watchdog_up(struct net_device *dev); |
2241 | ||
0a242efc | 2242 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 2243 | |
0a242efc | 2244 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 2245 | |
06c4648d IC |
2246 | extern void netif_notify_peers(struct net_device *dev); |
2247 | ||
bea3348e SH |
2248 | /** |
2249 | * netif_dormant_on - mark device as dormant. | |
2250 | * @dev: network device | |
2251 | * | |
2252 | * Mark device as dormant (as per RFC2863). | |
2253 | * | |
2254 | * The dormant state indicates that the relevant interface is not | |
2255 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
2256 | * in a "pending" state, waiting for some external event. For "on- | |
2257 | * demand" interfaces, this new state identifies the situation where the | |
2258 | * interface is waiting for events to place it in the up state. | |
2259 | * | |
2260 | */ | |
b00055aa SR |
2261 | static inline void netif_dormant_on(struct net_device *dev) |
2262 | { | |
2263 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2264 | linkwatch_fire_event(dev); | |
2265 | } | |
2266 | ||
bea3348e SH |
2267 | /** |
2268 | * netif_dormant_off - set device as not dormant. | |
2269 | * @dev: network device | |
2270 | * | |
2271 | * Device is not in dormant state. | |
2272 | */ | |
b00055aa SR |
2273 | static inline void netif_dormant_off(struct net_device *dev) |
2274 | { | |
2275 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2276 | linkwatch_fire_event(dev); | |
2277 | } | |
2278 | ||
bea3348e SH |
2279 | /** |
2280 | * netif_dormant - test if carrier present | |
2281 | * @dev: network device | |
2282 | * | |
2283 | * Check if carrier is present on device | |
2284 | */ | |
4d29515f | 2285 | static inline bool netif_dormant(const struct net_device *dev) |
b00055aa SR |
2286 | { |
2287 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
2288 | } | |
2289 | ||
2290 | ||
bea3348e SH |
2291 | /** |
2292 | * netif_oper_up - test if device is operational | |
2293 | * @dev: network device | |
2294 | * | |
2295 | * Check if carrier is operational | |
2296 | */ | |
4d29515f | 2297 | static inline bool netif_oper_up(const struct net_device *dev) |
d94d9fee | 2298 | { |
b00055aa SR |
2299 | return (dev->operstate == IF_OPER_UP || |
2300 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
2301 | } | |
2302 | ||
bea3348e SH |
2303 | /** |
2304 | * netif_device_present - is device available or removed | |
2305 | * @dev: network device | |
2306 | * | |
2307 | * Check if device has not been removed from system. | |
2308 | */ | |
4d29515f | 2309 | static inline bool netif_device_present(struct net_device *dev) |
1da177e4 LT |
2310 | { |
2311 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
2312 | } | |
2313 | ||
56079431 | 2314 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 2315 | |
56079431 | 2316 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
2317 | |
2318 | /* | |
2319 | * Network interface message level settings | |
2320 | */ | |
1da177e4 LT |
2321 | |
2322 | enum { | |
2323 | NETIF_MSG_DRV = 0x0001, | |
2324 | NETIF_MSG_PROBE = 0x0002, | |
2325 | NETIF_MSG_LINK = 0x0004, | |
2326 | NETIF_MSG_TIMER = 0x0008, | |
2327 | NETIF_MSG_IFDOWN = 0x0010, | |
2328 | NETIF_MSG_IFUP = 0x0020, | |
2329 | NETIF_MSG_RX_ERR = 0x0040, | |
2330 | NETIF_MSG_TX_ERR = 0x0080, | |
2331 | NETIF_MSG_TX_QUEUED = 0x0100, | |
2332 | NETIF_MSG_INTR = 0x0200, | |
2333 | NETIF_MSG_TX_DONE = 0x0400, | |
2334 | NETIF_MSG_RX_STATUS = 0x0800, | |
2335 | NETIF_MSG_PKTDATA = 0x1000, | |
2336 | NETIF_MSG_HW = 0x2000, | |
2337 | NETIF_MSG_WOL = 0x4000, | |
2338 | }; | |
2339 | ||
2340 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
2341 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
2342 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
2343 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
2344 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
2345 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
2346 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
2347 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
2348 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
2349 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
2350 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
2351 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
2352 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
2353 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
2354 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
2355 | ||
2356 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
2357 | { | |
2358 | /* use default */ | |
2359 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
2360 | return default_msg_enable_bits; | |
2361 | if (debug_value == 0) /* no output */ | |
2362 | return 0; | |
2363 | /* set low N bits */ | |
2364 | return (1 << debug_value) - 1; | |
2365 | } | |
2366 | ||
c773e847 | 2367 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 2368 | { |
c773e847 DM |
2369 | spin_lock(&txq->_xmit_lock); |
2370 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
2371 | } |
2372 | ||
fd2ea0a7 DM |
2373 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2374 | { | |
2375 | spin_lock_bh(&txq->_xmit_lock); | |
2376 | txq->xmit_lock_owner = smp_processor_id(); | |
2377 | } | |
2378 | ||
4d29515f | 2379 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
c3f26a26 | 2380 | { |
4d29515f | 2381 | bool ok = spin_trylock(&txq->_xmit_lock); |
c3f26a26 DM |
2382 | if (likely(ok)) |
2383 | txq->xmit_lock_owner = smp_processor_id(); | |
2384 | return ok; | |
2385 | } | |
2386 | ||
2387 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
2388 | { | |
2389 | txq->xmit_lock_owner = -1; | |
2390 | spin_unlock(&txq->_xmit_lock); | |
2391 | } | |
2392 | ||
2393 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
2394 | { | |
2395 | txq->xmit_lock_owner = -1; | |
2396 | spin_unlock_bh(&txq->_xmit_lock); | |
2397 | } | |
2398 | ||
08baf561 ED |
2399 | static inline void txq_trans_update(struct netdev_queue *txq) |
2400 | { | |
2401 | if (txq->xmit_lock_owner != -1) | |
2402 | txq->trans_start = jiffies; | |
2403 | } | |
2404 | ||
d29f749e DJ |
2405 | /** |
2406 | * netif_tx_lock - grab network device transmit lock | |
2407 | * @dev: network device | |
d29f749e DJ |
2408 | * |
2409 | * Get network device transmit lock | |
2410 | */ | |
22dd7495 JHS |
2411 | static inline void netif_tx_lock(struct net_device *dev) |
2412 | { | |
e8a0464c | 2413 | unsigned int i; |
c3f26a26 | 2414 | int cpu; |
c773e847 | 2415 | |
c3f26a26 DM |
2416 | spin_lock(&dev->tx_global_lock); |
2417 | cpu = smp_processor_id(); | |
e8a0464c DM |
2418 | for (i = 0; i < dev->num_tx_queues; i++) { |
2419 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2420 | |
2421 | /* We are the only thread of execution doing a | |
2422 | * freeze, but we have to grab the _xmit_lock in | |
2423 | * order to synchronize with threads which are in | |
2424 | * the ->hard_start_xmit() handler and already | |
2425 | * checked the frozen bit. | |
2426 | */ | |
e8a0464c | 2427 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
2428 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2429 | __netif_tx_unlock(txq); | |
e8a0464c | 2430 | } |
932ff279 HX |
2431 | } |
2432 | ||
2433 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
2434 | { | |
e8a0464c DM |
2435 | local_bh_disable(); |
2436 | netif_tx_lock(dev); | |
932ff279 HX |
2437 | } |
2438 | ||
932ff279 HX |
2439 | static inline void netif_tx_unlock(struct net_device *dev) |
2440 | { | |
e8a0464c DM |
2441 | unsigned int i; |
2442 | ||
2443 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2444 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2445 | |
c3f26a26 DM |
2446 | /* No need to grab the _xmit_lock here. If the |
2447 | * queue is not stopped for another reason, we | |
2448 | * force a schedule. | |
2449 | */ | |
2450 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2451 | netif_schedule_queue(txq); |
c3f26a26 DM |
2452 | } |
2453 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2454 | } |
2455 | ||
2456 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2457 | { | |
e8a0464c DM |
2458 | netif_tx_unlock(dev); |
2459 | local_bh_enable(); | |
932ff279 HX |
2460 | } |
2461 | ||
c773e847 | 2462 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2463 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2464 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2465 | } \ |
2466 | } | |
2467 | ||
c773e847 | 2468 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2469 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2470 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2471 | } \ |
2472 | } | |
2473 | ||
1da177e4 LT |
2474 | static inline void netif_tx_disable(struct net_device *dev) |
2475 | { | |
fd2ea0a7 | 2476 | unsigned int i; |
c3f26a26 | 2477 | int cpu; |
fd2ea0a7 | 2478 | |
c3f26a26 DM |
2479 | local_bh_disable(); |
2480 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2481 | for (i = 0; i < dev->num_tx_queues; i++) { |
2482 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2483 | |
2484 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2485 | netif_tx_stop_queue(txq); |
c3f26a26 | 2486 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2487 | } |
c3f26a26 | 2488 | local_bh_enable(); |
1da177e4 LT |
2489 | } |
2490 | ||
e308a5d8 DM |
2491 | static inline void netif_addr_lock(struct net_device *dev) |
2492 | { | |
2493 | spin_lock(&dev->addr_list_lock); | |
2494 | } | |
2495 | ||
2429f7ac JP |
2496 | static inline void netif_addr_lock_nested(struct net_device *dev) |
2497 | { | |
2498 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); | |
2499 | } | |
2500 | ||
e308a5d8 DM |
2501 | static inline void netif_addr_lock_bh(struct net_device *dev) |
2502 | { | |
2503 | spin_lock_bh(&dev->addr_list_lock); | |
2504 | } | |
2505 | ||
2506 | static inline void netif_addr_unlock(struct net_device *dev) | |
2507 | { | |
2508 | spin_unlock(&dev->addr_list_lock); | |
2509 | } | |
2510 | ||
2511 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2512 | { | |
2513 | spin_unlock_bh(&dev->addr_list_lock); | |
2514 | } | |
2515 | ||
f001fde5 | 2516 | /* |
31278e71 | 2517 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2518 | * rcu_read_lock held. |
2519 | */ | |
2520 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2521 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2522 | |
1da177e4 LT |
2523 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2524 | ||
2525 | extern void ether_setup(struct net_device *dev); | |
2526 | ||
2527 | /* Support for loadable net-drivers */ | |
36909ea4 | 2528 | extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
f25f4e44 | 2529 | void (*setup)(struct net_device *), |
36909ea4 | 2530 | unsigned int txqs, unsigned int rxqs); |
f25f4e44 | 2531 | #define alloc_netdev(sizeof_priv, name, setup) \ |
36909ea4 TH |
2532 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2533 | ||
2534 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ | |
2535 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) | |
2536 | ||
1da177e4 LT |
2537 | extern int register_netdev(struct net_device *dev); |
2538 | extern void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2539 | |
22bedad3 JP |
2540 | /* General hardware address lists handling functions */ |
2541 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
2542 | struct netdev_hw_addr_list *from_list, | |
2543 | int addr_len, unsigned char addr_type); | |
2544 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
2545 | struct netdev_hw_addr_list *from_list, | |
2546 | int addr_len, unsigned char addr_type); | |
2547 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
2548 | struct netdev_hw_addr_list *from_list, | |
2549 | int addr_len); | |
2550 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2551 | struct netdev_hw_addr_list *from_list, | |
2552 | int addr_len); | |
2553 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
2554 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
2555 | ||
f001fde5 JP |
2556 | /* Functions used for device addresses handling */ |
2557 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
2558 | unsigned char addr_type); | |
2559 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
2560 | unsigned char addr_type); | |
2561 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
2562 | struct net_device *from_dev, | |
2563 | unsigned char addr_type); | |
2564 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
2565 | struct net_device *from_dev, | |
2566 | unsigned char addr_type); | |
a748ee24 JP |
2567 | extern void dev_addr_flush(struct net_device *dev); |
2568 | extern int dev_addr_init(struct net_device *dev); | |
2569 | ||
2570 | /* Functions used for unicast addresses handling */ | |
2571 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); | |
12a94634 | 2572 | extern int dev_uc_add_excl(struct net_device *dev, unsigned char *addr); |
a748ee24 JP |
2573 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); |
2574 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); | |
2575 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
2576 | extern void dev_uc_flush(struct net_device *dev); | |
2577 | extern void dev_uc_init(struct net_device *dev); | |
f001fde5 | 2578 | |
22bedad3 JP |
2579 | /* Functions used for multicast addresses handling */ |
2580 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); | |
2581 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); | |
12a94634 | 2582 | extern int dev_mc_add_excl(struct net_device *dev, unsigned char *addr); |
22bedad3 JP |
2583 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); |
2584 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); | |
2585 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
2586 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
2587 | extern void dev_mc_flush(struct net_device *dev); | |
2588 | extern void dev_mc_init(struct net_device *dev); | |
f001fde5 | 2589 | |
4417da66 PM |
2590 | /* Functions used for secondary unicast and multicast support */ |
2591 | extern void dev_set_rx_mode(struct net_device *dev); | |
2592 | extern void __dev_set_rx_mode(struct net_device *dev); | |
dad9b335 WC |
2593 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
2594 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 2595 | extern void netdev_state_change(struct net_device *dev); |
3ca5b404 | 2596 | extern int netdev_bonding_change(struct net_device *dev, |
75c78500 | 2597 | unsigned long event); |
d8a33ac4 | 2598 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 2599 | /* Load a device via the kmod */ |
881d966b | 2600 | extern void dev_load(struct net *net, const char *name); |
1da177e4 | 2601 | extern void dev_mcast_init(void); |
d7753516 BH |
2602 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
2603 | struct rtnl_link_stats64 *storage); | |
77a1abf5 ED |
2604 | extern void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
2605 | const struct net_device_stats *netdev_stats); | |
eeda3fd6 | 2606 | |
1da177e4 | 2607 | extern int netdev_max_backlog; |
3b098e2d | 2608 | extern int netdev_tstamp_prequeue; |
1da177e4 | 2609 | extern int weight_p; |
0a14842f | 2610 | extern int bpf_jit_enable; |
1da177e4 | 2611 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
1765a575 JP |
2612 | extern int netdev_set_bond_master(struct net_device *dev, |
2613 | struct net_device *master); | |
84fa7933 | 2614 | extern int skb_checksum_help(struct sk_buff *skb); |
c8f44aff MM |
2615 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, |
2616 | netdev_features_t features); | |
fb286bb2 HX |
2617 | #ifdef CONFIG_BUG |
2618 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2619 | #else | |
2620 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2621 | { | |
2622 | } | |
2623 | #endif | |
1da177e4 LT |
2624 | /* rx skb timestamps */ |
2625 | extern void net_enable_timestamp(void); | |
2626 | extern void net_disable_timestamp(void); | |
2627 | ||
20380731 ACM |
2628 | #ifdef CONFIG_PROC_FS |
2629 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
2630 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
2631 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
2632 | #endif | |
2633 | ||
b8a9787e JV |
2634 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
2635 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2636 | ||
04600794 JB |
2637 | extern struct kobj_ns_type_operations net_ns_type_operations; |
2638 | ||
3019de12 | 2639 | extern const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 2640 | |
20380731 ACM |
2641 | extern void linkwatch_run_queue(void); |
2642 | ||
c8f44aff MM |
2643 | static inline netdev_features_t netdev_get_wanted_features( |
2644 | struct net_device *dev) | |
5455c699 MM |
2645 | { |
2646 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
2647 | } | |
c8f44aff MM |
2648 | netdev_features_t netdev_increment_features(netdev_features_t all, |
2649 | netdev_features_t one, netdev_features_t mask); | |
6cb6a27c | 2650 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 2651 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 2652 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 2653 | |
fc4a7489 PM |
2654 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2655 | struct net_device *dev); | |
2656 | ||
c8f44aff | 2657 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 2658 | |
4d29515f | 2659 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 2660 | { |
c8f44aff | 2661 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
2662 | |
2663 | /* check flags correspondence */ | |
2664 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
2665 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
2666 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
2667 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
2668 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
2669 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
2670 | ||
d6b4991a | 2671 | return (features & feature) == feature; |
576a30eb HX |
2672 | } |
2673 | ||
4d29515f | 2674 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 2675 | { |
278b2513 | 2676 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 2677 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
2678 | } |
2679 | ||
4d29515f DM |
2680 | static inline bool netif_needs_gso(struct sk_buff *skb, |
2681 | netdev_features_t features) | |
7967168c | 2682 | { |
fc741216 | 2683 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
cdbee74c YZ |
2684 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
2685 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); | |
7967168c HX |
2686 | } |
2687 | ||
82cc1a7a PWJ |
2688 | static inline void netif_set_gso_max_size(struct net_device *dev, |
2689 | unsigned int size) | |
2690 | { | |
2691 | dev->gso_max_size = size; | |
2692 | } | |
2693 | ||
4d29515f | 2694 | static inline bool netif_is_bond_slave(struct net_device *dev) |
1765a575 JP |
2695 | { |
2696 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
2697 | } | |
2698 | ||
3bdc0eba BG |
2699 | static inline bool netif_supports_nofcs(struct net_device *dev) |
2700 | { | |
2701 | return dev->priv_flags & IFF_SUPP_NOFCS; | |
2702 | } | |
2703 | ||
505d4f73 | 2704 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 2705 | |
571ba423 JP |
2706 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
2707 | ||
2708 | /* netdev_printk helpers, similar to dev_printk */ | |
2709 | ||
2710 | static inline const char *netdev_name(const struct net_device *dev) | |
2711 | { | |
2712 | if (dev->reg_state != NETREG_REGISTERED) | |
2713 | return "(unregistered net_device)"; | |
2714 | return dev->name; | |
2715 | } | |
2716 | ||
ffa10cb4 JB |
2717 | extern int __netdev_printk(const char *level, const struct net_device *dev, |
2718 | struct va_format *vaf); | |
2719 | ||
b9075fa9 JP |
2720 | extern __printf(3, 4) |
2721 | int netdev_printk(const char *level, const struct net_device *dev, | |
2722 | const char *format, ...); | |
2723 | extern __printf(2, 3) | |
2724 | int netdev_emerg(const struct net_device *dev, const char *format, ...); | |
2725 | extern __printf(2, 3) | |
2726 | int netdev_alert(const struct net_device *dev, const char *format, ...); | |
2727 | extern __printf(2, 3) | |
2728 | int netdev_crit(const struct net_device *dev, const char *format, ...); | |
2729 | extern __printf(2, 3) | |
2730 | int netdev_err(const struct net_device *dev, const char *format, ...); | |
2731 | extern __printf(2, 3) | |
2732 | int netdev_warn(const struct net_device *dev, const char *format, ...); | |
2733 | extern __printf(2, 3) | |
2734 | int netdev_notice(const struct net_device *dev, const char *format, ...); | |
2735 | extern __printf(2, 3) | |
2736 | int netdev_info(const struct net_device *dev, const char *format, ...); | |
571ba423 | 2737 | |
8909c9ad VK |
2738 | #define MODULE_ALIAS_NETDEV(device) \ |
2739 | MODULE_ALIAS("netdev-" device) | |
2740 | ||
b558c96f | 2741 | #if defined(CONFIG_DYNAMIC_DEBUG) |
571ba423 JP |
2742 | #define netdev_dbg(__dev, format, args...) \ |
2743 | do { \ | |
ffa10cb4 | 2744 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 | 2745 | } while (0) |
b558c96f JC |
2746 | #elif defined(DEBUG) |
2747 | #define netdev_dbg(__dev, format, args...) \ | |
2748 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
571ba423 JP |
2749 | #else |
2750 | #define netdev_dbg(__dev, format, args...) \ | |
2751 | ({ \ | |
2752 | if (0) \ | |
2753 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2754 | 0; \ | |
2755 | }) | |
2756 | #endif | |
2757 | ||
2758 | #if defined(VERBOSE_DEBUG) | |
2759 | #define netdev_vdbg netdev_dbg | |
2760 | #else | |
2761 | ||
2762 | #define netdev_vdbg(dev, format, args...) \ | |
2763 | ({ \ | |
2764 | if (0) \ | |
2765 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2766 | 0; \ | |
2767 | }) | |
2768 | #endif | |
2769 | ||
2770 | /* | |
2771 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2772 | * of using a WARN/WARN_ON to get the message out, including the | |
2773 | * file/line information and a backtrace. | |
2774 | */ | |
2775 | #define netdev_WARN(dev, format, args...) \ | |
2776 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2777 | ||
b3d95c5c JP |
2778 | /* netif printk helpers, similar to netdev_printk */ |
2779 | ||
2780 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2781 | do { \ | |
2782 | if (netif_msg_##type(priv)) \ | |
2783 | netdev_printk(level, (dev), fmt, ##args); \ | |
2784 | } while (0) | |
2785 | ||
f45f4321 JP |
2786 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
2787 | do { \ | |
2788 | if (netif_msg_##type(priv)) \ | |
2789 | netdev_##level(dev, fmt, ##args); \ | |
2790 | } while (0) | |
2791 | ||
b3d95c5c | 2792 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 2793 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 2794 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 2795 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 2796 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 2797 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 2798 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 2799 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 2800 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 2801 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 2802 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 2803 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 2804 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 2805 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c JP |
2806 | |
2807 | #if defined(DEBUG) | |
2808 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2809 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
2810 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2811 | #define netif_dbg(priv, type, netdev, format, args...) \ | |
2812 | do { \ | |
2813 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 2814 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c JP |
2815 | } while (0) |
2816 | #else | |
2817 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2818 | ({ \ | |
2819 | if (0) \ | |
2820 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2821 | 0; \ | |
2822 | }) | |
2823 | #endif | |
2824 | ||
2825 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 2826 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
2827 | #else |
2828 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
2829 | ({ \ | |
2830 | if (0) \ | |
a4ed89cb | 2831 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
2832 | 0; \ |
2833 | }) | |
2834 | #endif | |
571ba423 | 2835 | |
1da177e4 LT |
2836 | #endif /* __KERNEL__ */ |
2837 | ||
385a154c | 2838 | #endif /* _LINUX_NETDEVICE_H */ |