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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> |
bea3348e | 36 | #include <linux/delay.h> |
60063497 | 37 | #include <linux/atomic.h> |
1da177e4 LT |
38 | #include <asm/cache.h> |
39 | #include <asm/byteorder.h> | |
40 | ||
1da177e4 LT |
41 | #include <linux/device.h> |
42 | #include <linux/percpu.h> | |
4d5b78c0 | 43 | #include <linux/rculist.h> |
db217334 | 44 | #include <linux/dmaengine.h> |
bea3348e | 45 | #include <linux/workqueue.h> |
1da177e4 | 46 | |
b1b67dd4 | 47 | #include <linux/ethtool.h> |
a050c33f | 48 | #include <net/net_namespace.h> |
cf85d08f | 49 | #include <net/dsa.h> |
7a6b6f51 | 50 | #ifdef CONFIG_DCB |
2f90b865 AD |
51 | #include <net/dcbnl.h> |
52 | #endif | |
a050c33f | 53 | |
a59e2ecb MM |
54 | #include <linux/netdev_features.h> |
55 | ||
1da177e4 | 56 | struct vlan_group; |
115c1d6e | 57 | struct netpoll_info; |
c1f19b51 | 58 | struct phy_device; |
704232c2 JB |
59 | /* 802.11 specific */ |
60 | struct wireless_dev; | |
1da177e4 LT |
61 | /* source back-compat hooks */ |
62 | #define SET_ETHTOOL_OPS(netdev,ops) \ | |
63 | ( (netdev)->ethtool_ops = (ops) ) | |
64 | ||
c1f79426 SA |
65 | /* hardware address assignment types */ |
66 | #define NET_ADDR_PERM 0 /* address is permanent (default) */ | |
67 | #define NET_ADDR_RANDOM 1 /* address is generated randomly */ | |
68 | #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ | |
69 | ||
9a1654ba JP |
70 | /* Backlog congestion levels */ |
71 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ | |
72 | #define NET_RX_DROP 1 /* packet dropped */ | |
73 | ||
572a9d7b PM |
74 | /* |
75 | * Transmit return codes: transmit return codes originate from three different | |
76 | * namespaces: | |
77 | * | |
78 | * - qdisc return codes | |
79 | * - driver transmit return codes | |
80 | * - errno values | |
81 | * | |
82 | * Drivers are allowed to return any one of those in their hard_start_xmit() | |
83 | * function. Real network devices commonly used with qdiscs should only return | |
84 | * the driver transmit return codes though - when qdiscs are used, the actual | |
85 | * transmission happens asynchronously, so the value is not propagated to | |
86 | * higher layers. Virtual network devices transmit synchronously, in this case | |
87 | * the driver transmit return codes are consumed by dev_queue_xmit(), all | |
88 | * others are propagated to higher layers. | |
89 | */ | |
90 | ||
91 | /* qdisc ->enqueue() return codes. */ | |
92 | #define NET_XMIT_SUCCESS 0x00 | |
9a1654ba JP |
93 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
94 | #define NET_XMIT_CN 0x02 /* congestion notification */ | |
95 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ | |
96 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ | |
1da177e4 | 97 | |
b9df3cb8 GR |
98 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
99 | * indicates that the device will soon be dropping packets, or already drops | |
100 | * some packets of the same priority; prompting us to send less aggressively. */ | |
572a9d7b | 101 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
1da177e4 LT |
102 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
103 | ||
dc1f8bf6 | 104 | /* Driver transmit return codes */ |
9a1654ba | 105 | #define NETDEV_TX_MASK 0xf0 |
572a9d7b | 106 | |
dc1f8bf6 | 107 | enum netdev_tx { |
572a9d7b | 108 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
9a1654ba JP |
109 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
110 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ | |
111 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ | |
dc1f8bf6 SH |
112 | }; |
113 | typedef enum netdev_tx netdev_tx_t; | |
114 | ||
9a1654ba JP |
115 | /* |
116 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; | |
117 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. | |
118 | */ | |
119 | static inline bool dev_xmit_complete(int rc) | |
120 | { | |
121 | /* | |
122 | * Positive cases with an skb consumed by a driver: | |
123 | * - successful transmission (rc == NETDEV_TX_OK) | |
124 | * - error while transmitting (rc < 0) | |
125 | * - error while queueing to a different device (rc & NET_XMIT_MASK) | |
126 | */ | |
127 | if (likely(rc < NET_XMIT_MASK)) | |
128 | return true; | |
129 | ||
130 | return false; | |
131 | } | |
132 | ||
1da177e4 LT |
133 | #endif |
134 | ||
135 | #define MAX_ADDR_LEN 32 /* Largest hardware address length */ | |
136 | ||
23b41168 VD |
137 | /* Initial net device group. All devices belong to group 0 by default. */ |
138 | #define INIT_NETDEV_GROUP 0 | |
139 | ||
c88e6f51 | 140 | #ifdef __KERNEL__ |
1da177e4 LT |
141 | /* |
142 | * Compute the worst case header length according to the protocols | |
143 | * used. | |
144 | */ | |
fe2918b0 | 145 | |
caf66e58 | 146 | #if defined(CONFIG_WLAN) || defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) |
8388e3da DM |
147 | # if defined(CONFIG_MAC80211_MESH) |
148 | # define LL_MAX_HEADER 128 | |
149 | # else | |
150 | # define LL_MAX_HEADER 96 | |
151 | # endif | |
c759a6b4 | 152 | #elif defined(CONFIG_TR) || defined(CONFIG_TR_MODULE) |
8388e3da | 153 | # define LL_MAX_HEADER 48 |
1da177e4 | 154 | #else |
8388e3da | 155 | # define LL_MAX_HEADER 32 |
1da177e4 LT |
156 | #endif |
157 | ||
e81c7359 DM |
158 | #if !defined(CONFIG_NET_IPIP) && !defined(CONFIG_NET_IPIP_MODULE) && \ |
159 | !defined(CONFIG_NET_IPGRE) && !defined(CONFIG_NET_IPGRE_MODULE) && \ | |
160 | !defined(CONFIG_IPV6_SIT) && !defined(CONFIG_IPV6_SIT_MODULE) && \ | |
161 | !defined(CONFIG_IPV6_TUNNEL) && !defined(CONFIG_IPV6_TUNNEL_MODULE) | |
1da177e4 LT |
162 | #define MAX_HEADER LL_MAX_HEADER |
163 | #else | |
164 | #define MAX_HEADER (LL_MAX_HEADER + 48) | |
165 | #endif | |
166 | ||
167 | /* | |
be1f3c2c BH |
168 | * Old network device statistics. Fields are native words |
169 | * (unsigned long) so they can be read and written atomically. | |
1da177e4 | 170 | */ |
fe2918b0 | 171 | |
d94d9fee | 172 | struct net_device_stats { |
3cfde79c BH |
173 | unsigned long rx_packets; |
174 | unsigned long tx_packets; | |
175 | unsigned long rx_bytes; | |
176 | unsigned long tx_bytes; | |
177 | unsigned long rx_errors; | |
178 | unsigned long tx_errors; | |
179 | unsigned long rx_dropped; | |
180 | unsigned long tx_dropped; | |
181 | unsigned long multicast; | |
1da177e4 | 182 | unsigned long collisions; |
1da177e4 | 183 | unsigned long rx_length_errors; |
3cfde79c BH |
184 | unsigned long rx_over_errors; |
185 | unsigned long rx_crc_errors; | |
186 | unsigned long rx_frame_errors; | |
187 | unsigned long rx_fifo_errors; | |
188 | unsigned long rx_missed_errors; | |
1da177e4 LT |
189 | unsigned long tx_aborted_errors; |
190 | unsigned long tx_carrier_errors; | |
191 | unsigned long tx_fifo_errors; | |
192 | unsigned long tx_heartbeat_errors; | |
193 | unsigned long tx_window_errors; | |
1da177e4 LT |
194 | unsigned long rx_compressed; |
195 | unsigned long tx_compressed; | |
196 | }; | |
197 | ||
be1f3c2c BH |
198 | #endif /* __KERNEL__ */ |
199 | ||
1da177e4 LT |
200 | |
201 | /* Media selection options. */ | |
202 | enum { | |
203 | IF_PORT_UNKNOWN = 0, | |
204 | IF_PORT_10BASE2, | |
205 | IF_PORT_10BASET, | |
206 | IF_PORT_AUI, | |
207 | IF_PORT_100BASET, | |
208 | IF_PORT_100BASETX, | |
209 | IF_PORT_100BASEFX | |
210 | }; | |
211 | ||
212 | #ifdef __KERNEL__ | |
213 | ||
214 | #include <linux/cache.h> | |
215 | #include <linux/skbuff.h> | |
216 | ||
adc9300e ED |
217 | #ifdef CONFIG_RPS |
218 | #include <linux/jump_label.h> | |
219 | extern struct jump_label_key rps_needed; | |
220 | #endif | |
221 | ||
1da177e4 LT |
222 | struct neighbour; |
223 | struct neigh_parms; | |
224 | struct sk_buff; | |
225 | ||
f001fde5 JP |
226 | struct netdev_hw_addr { |
227 | struct list_head list; | |
228 | unsigned char addr[MAX_ADDR_LEN]; | |
229 | unsigned char type; | |
ccffad25 JP |
230 | #define NETDEV_HW_ADDR_T_LAN 1 |
231 | #define NETDEV_HW_ADDR_T_SAN 2 | |
232 | #define NETDEV_HW_ADDR_T_SLAVE 3 | |
233 | #define NETDEV_HW_ADDR_T_UNICAST 4 | |
22bedad3 | 234 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
ccffad25 | 235 | bool synced; |
22bedad3 | 236 | bool global_use; |
8f8f103d | 237 | int refcount; |
f001fde5 JP |
238 | struct rcu_head rcu_head; |
239 | }; | |
240 | ||
31278e71 JP |
241 | struct netdev_hw_addr_list { |
242 | struct list_head list; | |
243 | int count; | |
244 | }; | |
245 | ||
22bedad3 JP |
246 | #define netdev_hw_addr_list_count(l) ((l)->count) |
247 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) | |
248 | #define netdev_hw_addr_list_for_each(ha, l) \ | |
249 | list_for_each_entry(ha, &(l)->list, list) | |
32e7bfc4 | 250 | |
22bedad3 JP |
251 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
252 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) | |
253 | #define netdev_for_each_uc_addr(ha, dev) \ | |
254 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) | |
6683ece3 | 255 | |
22bedad3 JP |
256 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
257 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) | |
18e225f2 | 258 | #define netdev_for_each_mc_addr(ha, dev) \ |
22bedad3 | 259 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
6683ece3 | 260 | |
d94d9fee | 261 | struct hh_cache { |
f6b72b62 | 262 | u16 hh_len; |
5c25f686 | 263 | u16 __pad; |
3644f0ce | 264 | seqlock_t hh_lock; |
1da177e4 LT |
265 | |
266 | /* cached hardware header; allow for machine alignment needs. */ | |
267 | #define HH_DATA_MOD 16 | |
268 | #define HH_DATA_OFF(__len) \ | |
5ba0eac6 | 269 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
1da177e4 LT |
270 | #define HH_DATA_ALIGN(__len) \ |
271 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) | |
272 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; | |
273 | }; | |
274 | ||
275 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. | |
276 | * Alternative is: | |
277 | * dev->hard_header_len ? (dev->hard_header_len + | |
278 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 | |
279 | * | |
280 | * We could use other alignment values, but we must maintain the | |
281 | * relationship HH alignment <= LL alignment. | |
282 | */ | |
283 | #define LL_RESERVED_SPACE(dev) \ | |
f5184d26 | 284 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 285 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
f5184d26 | 286 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
1da177e4 | 287 | |
3b04ddde SH |
288 | struct header_ops { |
289 | int (*create) (struct sk_buff *skb, struct net_device *dev, | |
290 | unsigned short type, const void *daddr, | |
291 | const void *saddr, unsigned len); | |
292 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); | |
293 | int (*rebuild)(struct sk_buff *skb); | |
e69dd336 | 294 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
3b04ddde SH |
295 | void (*cache_update)(struct hh_cache *hh, |
296 | const struct net_device *dev, | |
297 | const unsigned char *haddr); | |
298 | }; | |
299 | ||
1da177e4 LT |
300 | /* These flag bits are private to the generic network queueing |
301 | * layer, they may not be explicitly referenced by any other | |
302 | * code. | |
303 | */ | |
304 | ||
d94d9fee | 305 | enum netdev_state_t { |
1da177e4 LT |
306 | __LINK_STATE_START, |
307 | __LINK_STATE_PRESENT, | |
1da177e4 | 308 | __LINK_STATE_NOCARRIER, |
b00055aa SR |
309 | __LINK_STATE_LINKWATCH_PENDING, |
310 | __LINK_STATE_DORMANT, | |
1da177e4 LT |
311 | }; |
312 | ||
313 | ||
314 | /* | |
315 | * This structure holds at boot time configured netdevice settings. They | |
fe2918b0 | 316 | * are then used in the device probing. |
1da177e4 LT |
317 | */ |
318 | struct netdev_boot_setup { | |
319 | char name[IFNAMSIZ]; | |
320 | struct ifmap map; | |
321 | }; | |
322 | #define NETDEV_BOOT_SETUP_MAX 8 | |
323 | ||
20380731 | 324 | extern int __init netdev_boot_setup(char *str); |
1da177e4 | 325 | |
bea3348e SH |
326 | /* |
327 | * Structure for NAPI scheduling similar to tasklet but with weighting | |
328 | */ | |
329 | struct napi_struct { | |
330 | /* The poll_list must only be managed by the entity which | |
331 | * changes the state of the NAPI_STATE_SCHED bit. This means | |
332 | * whoever atomically sets that bit can add this napi_struct | |
333 | * to the per-cpu poll_list, and whoever clears that bit | |
334 | * can remove from the list right before clearing the bit. | |
335 | */ | |
336 | struct list_head poll_list; | |
337 | ||
338 | unsigned long state; | |
339 | int weight; | |
340 | int (*poll)(struct napi_struct *, int); | |
341 | #ifdef CONFIG_NETPOLL | |
342 | spinlock_t poll_lock; | |
343 | int poll_owner; | |
bea3348e | 344 | #endif |
4ae5544f HX |
345 | |
346 | unsigned int gro_count; | |
347 | ||
5d38a079 | 348 | struct net_device *dev; |
d565b0a1 HX |
349 | struct list_head dev_list; |
350 | struct sk_buff *gro_list; | |
5d38a079 | 351 | struct sk_buff *skb; |
bea3348e SH |
352 | }; |
353 | ||
d94d9fee | 354 | enum { |
bea3348e | 355 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
a0a46196 | 356 | NAPI_STATE_DISABLE, /* Disable pending */ |
7b363e44 | 357 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
bea3348e SH |
358 | }; |
359 | ||
5b252f0c | 360 | enum gro_result { |
d1c76af9 HX |
361 | GRO_MERGED, |
362 | GRO_MERGED_FREE, | |
363 | GRO_HELD, | |
364 | GRO_NORMAL, | |
365 | GRO_DROP, | |
366 | }; | |
5b252f0c | 367 | typedef enum gro_result gro_result_t; |
d1c76af9 | 368 | |
8a4eb573 JP |
369 | /* |
370 | * enum rx_handler_result - Possible return values for rx_handlers. | |
371 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it | |
372 | * further. | |
373 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in | |
374 | * case skb->dev was changed by rx_handler. | |
375 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. | |
376 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. | |
377 | * | |
378 | * rx_handlers are functions called from inside __netif_receive_skb(), to do | |
379 | * special processing of the skb, prior to delivery to protocol handlers. | |
380 | * | |
381 | * Currently, a net_device can only have a single rx_handler registered. Trying | |
382 | * to register a second rx_handler will return -EBUSY. | |
383 | * | |
384 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). | |
385 | * To unregister a rx_handler on a net_device, use | |
386 | * netdev_rx_handler_unregister(). | |
387 | * | |
388 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to | |
389 | * do with the skb. | |
390 | * | |
391 | * If the rx_handler consumed to skb in some way, it should return | |
392 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for | |
393 | * the skb to be delivered in some other ways. | |
394 | * | |
395 | * If the rx_handler changed skb->dev, to divert the skb to another | |
396 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the | |
397 | * new device will be called if it exists. | |
398 | * | |
399 | * If the rx_handler consider the skb should be ignored, it should return | |
400 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that | |
401 | * are registred on exact device (ptype->dev == skb->dev). | |
402 | * | |
403 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally | |
404 | * delivered, it should return RX_HANDLER_PASS. | |
405 | * | |
406 | * A device without a registered rx_handler will behave as if rx_handler | |
407 | * returned RX_HANDLER_PASS. | |
408 | */ | |
409 | ||
410 | enum rx_handler_result { | |
411 | RX_HANDLER_CONSUMED, | |
412 | RX_HANDLER_ANOTHER, | |
413 | RX_HANDLER_EXACT, | |
414 | RX_HANDLER_PASS, | |
415 | }; | |
416 | typedef enum rx_handler_result rx_handler_result_t; | |
417 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); | |
ab95bfe0 | 418 | |
b3c97528 | 419 | extern void __napi_schedule(struct napi_struct *n); |
bea3348e | 420 | |
a0a46196 DM |
421 | static inline int napi_disable_pending(struct napi_struct *n) |
422 | { | |
423 | return test_bit(NAPI_STATE_DISABLE, &n->state); | |
424 | } | |
425 | ||
bea3348e SH |
426 | /** |
427 | * napi_schedule_prep - check if napi can be scheduled | |
428 | * @n: napi context | |
429 | * | |
430 | * Test if NAPI routine is already running, and if not mark | |
431 | * it as running. This is used as a condition variable | |
a0a46196 DM |
432 | * insure only one NAPI poll instance runs. We also make |
433 | * sure there is no pending NAPI disable. | |
bea3348e SH |
434 | */ |
435 | static inline int napi_schedule_prep(struct napi_struct *n) | |
436 | { | |
a0a46196 DM |
437 | return !napi_disable_pending(n) && |
438 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); | |
bea3348e SH |
439 | } |
440 | ||
441 | /** | |
442 | * napi_schedule - schedule NAPI poll | |
443 | * @n: napi context | |
444 | * | |
445 | * Schedule NAPI poll routine to be called if it is not already | |
446 | * running. | |
447 | */ | |
448 | static inline void napi_schedule(struct napi_struct *n) | |
449 | { | |
450 | if (napi_schedule_prep(n)) | |
451 | __napi_schedule(n); | |
452 | } | |
453 | ||
bfe13f54 RD |
454 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
455 | static inline int napi_reschedule(struct napi_struct *napi) | |
456 | { | |
457 | if (napi_schedule_prep(napi)) { | |
458 | __napi_schedule(napi); | |
459 | return 1; | |
460 | } | |
461 | return 0; | |
462 | } | |
463 | ||
bea3348e SH |
464 | /** |
465 | * napi_complete - NAPI processing complete | |
466 | * @n: napi context | |
467 | * | |
468 | * Mark NAPI processing as complete. | |
469 | */ | |
d565b0a1 HX |
470 | extern void __napi_complete(struct napi_struct *n); |
471 | extern void napi_complete(struct napi_struct *n); | |
bea3348e SH |
472 | |
473 | /** | |
474 | * napi_disable - prevent NAPI from scheduling | |
475 | * @n: napi context | |
476 | * | |
477 | * Stop NAPI from being scheduled on this context. | |
478 | * Waits till any outstanding processing completes. | |
479 | */ | |
480 | static inline void napi_disable(struct napi_struct *n) | |
481 | { | |
a0a46196 | 482 | set_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e | 483 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
43cc7380 | 484 | msleep(1); |
a0a46196 | 485 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
bea3348e SH |
486 | } |
487 | ||
488 | /** | |
489 | * napi_enable - enable NAPI scheduling | |
490 | * @n: napi context | |
491 | * | |
492 | * Resume NAPI from being scheduled on this context. | |
493 | * Must be paired with napi_disable. | |
494 | */ | |
495 | static inline void napi_enable(struct napi_struct *n) | |
496 | { | |
497 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); | |
498 | smp_mb__before_clear_bit(); | |
499 | clear_bit(NAPI_STATE_SCHED, &n->state); | |
500 | } | |
501 | ||
c264c3de SH |
502 | #ifdef CONFIG_SMP |
503 | /** | |
504 | * napi_synchronize - wait until NAPI is not running | |
505 | * @n: napi context | |
506 | * | |
507 | * Wait until NAPI is done being scheduled on this context. | |
508 | * Waits till any outstanding processing completes but | |
509 | * does not disable future activations. | |
510 | */ | |
511 | static inline void napi_synchronize(const struct napi_struct *n) | |
512 | { | |
513 | while (test_bit(NAPI_STATE_SCHED, &n->state)) | |
514 | msleep(1); | |
515 | } | |
516 | #else | |
517 | # define napi_synchronize(n) barrier() | |
518 | #endif | |
519 | ||
d94d9fee | 520 | enum netdev_queue_state_t { |
79d16385 | 521 | __QUEUE_STATE_XOFF, |
c3f26a26 | 522 | __QUEUE_STATE_FROZEN, |
5a0d2268 ED |
523 | #define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \ |
524 | (1 << __QUEUE_STATE_FROZEN)) | |
79d16385 DM |
525 | }; |
526 | ||
bb949fbd | 527 | struct netdev_queue { |
6a321cb3 ED |
528 | /* |
529 | * read mostly part | |
530 | */ | |
bb949fbd | 531 | struct net_device *dev; |
b0e1e646 | 532 | struct Qdisc *qdisc; |
79d16385 | 533 | unsigned long state; |
b0e1e646 | 534 | struct Qdisc *qdisc_sleeping; |
ccf5ff69 | 535 | #ifdef CONFIG_SYSFS |
1d24eb48 TH |
536 | struct kobject kobj; |
537 | #endif | |
f2cd2d3e ED |
538 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
539 | int numa_node; | |
540 | #endif | |
6a321cb3 ED |
541 | /* |
542 | * write mostly part | |
543 | */ | |
544 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; | |
545 | int xmit_lock_owner; | |
9d21493b ED |
546 | /* |
547 | * please use this field instead of dev->trans_start | |
548 | */ | |
549 | unsigned long trans_start; | |
ccf5ff69 | 550 | |
551 | /* | |
552 | * Number of TX timeouts for this queue | |
553 | * (/sys/class/net/DEV/Q/trans_timeout) | |
554 | */ | |
555 | unsigned long trans_timeout; | |
e8a0464c | 556 | } ____cacheline_aligned_in_smp; |
bb949fbd | 557 | |
f2cd2d3e ED |
558 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
559 | { | |
560 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
561 | return q->numa_node; | |
562 | #else | |
b236da69 | 563 | return NUMA_NO_NODE; |
f2cd2d3e ED |
564 | #endif |
565 | } | |
566 | ||
567 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) | |
568 | { | |
569 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) | |
570 | q->numa_node = node; | |
571 | #endif | |
572 | } | |
573 | ||
df334545 | 574 | #ifdef CONFIG_RPS |
0a9627f2 TH |
575 | /* |
576 | * This structure holds an RPS map which can be of variable length. The | |
577 | * map is an array of CPUs. | |
578 | */ | |
579 | struct rps_map { | |
580 | unsigned int len; | |
581 | struct rcu_head rcu; | |
582 | u16 cpus[0]; | |
583 | }; | |
584 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + (_num * sizeof(u16))) | |
585 | ||
fec5e652 | 586 | /* |
c445477d BH |
587 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
588 | * tail pointer for that CPU's input queue at the time of last enqueue, and | |
589 | * a hardware filter index. | |
fec5e652 TH |
590 | */ |
591 | struct rps_dev_flow { | |
592 | u16 cpu; | |
c445477d | 593 | u16 filter; |
fec5e652 TH |
594 | unsigned int last_qtail; |
595 | }; | |
c445477d | 596 | #define RPS_NO_FILTER 0xffff |
fec5e652 TH |
597 | |
598 | /* | |
599 | * The rps_dev_flow_table structure contains a table of flow mappings. | |
600 | */ | |
601 | struct rps_dev_flow_table { | |
602 | unsigned int mask; | |
603 | struct rcu_head rcu; | |
604 | struct work_struct free_work; | |
605 | struct rps_dev_flow flows[0]; | |
606 | }; | |
607 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ | |
608 | (_num * sizeof(struct rps_dev_flow))) | |
609 | ||
610 | /* | |
611 | * The rps_sock_flow_table contains mappings of flows to the last CPU | |
612 | * on which they were processed by the application (set in recvmsg). | |
613 | */ | |
614 | struct rps_sock_flow_table { | |
615 | unsigned int mask; | |
616 | u16 ents[0]; | |
617 | }; | |
618 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ | |
619 | (_num * sizeof(u16))) | |
620 | ||
621 | #define RPS_NO_CPU 0xffff | |
622 | ||
623 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, | |
624 | u32 hash) | |
625 | { | |
626 | if (table && hash) { | |
627 | unsigned int cpu, index = hash & table->mask; | |
628 | ||
629 | /* We only give a hint, preemption can change cpu under us */ | |
630 | cpu = raw_smp_processor_id(); | |
631 | ||
632 | if (table->ents[index] != cpu) | |
633 | table->ents[index] = cpu; | |
634 | } | |
635 | } | |
636 | ||
637 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, | |
638 | u32 hash) | |
639 | { | |
640 | if (table && hash) | |
641 | table->ents[hash & table->mask] = RPS_NO_CPU; | |
642 | } | |
643 | ||
6e3f7faf | 644 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
fec5e652 | 645 | |
c445477d BH |
646 | #ifdef CONFIG_RFS_ACCEL |
647 | extern bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, | |
648 | u32 flow_id, u16 filter_id); | |
649 | #endif | |
650 | ||
0a9627f2 TH |
651 | /* This structure contains an instance of an RX queue. */ |
652 | struct netdev_rx_queue { | |
6e3f7faf ED |
653 | struct rps_map __rcu *rps_map; |
654 | struct rps_dev_flow_table __rcu *rps_flow_table; | |
655 | struct kobject kobj; | |
fe822240 | 656 | struct net_device *dev; |
0a9627f2 | 657 | } ____cacheline_aligned_in_smp; |
fec5e652 | 658 | #endif /* CONFIG_RPS */ |
d314774c | 659 | |
bf264145 TH |
660 | #ifdef CONFIG_XPS |
661 | /* | |
662 | * This structure holds an XPS map which can be of variable length. The | |
663 | * map is an array of queues. | |
664 | */ | |
665 | struct xps_map { | |
666 | unsigned int len; | |
667 | unsigned int alloc_len; | |
668 | struct rcu_head rcu; | |
669 | u16 queues[0]; | |
670 | }; | |
671 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + (_num * sizeof(u16))) | |
672 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ | |
673 | / sizeof(u16)) | |
674 | ||
675 | /* | |
676 | * This structure holds all XPS maps for device. Maps are indexed by CPU. | |
677 | */ | |
678 | struct xps_dev_maps { | |
679 | struct rcu_head rcu; | |
a4177869 | 680 | struct xps_map __rcu *cpu_map[0]; |
bf264145 TH |
681 | }; |
682 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ | |
683 | (nr_cpu_ids * sizeof(struct xps_map *))) | |
684 | #endif /* CONFIG_XPS */ | |
685 | ||
4f57c087 JF |
686 | #define TC_MAX_QUEUE 16 |
687 | #define TC_BITMASK 15 | |
688 | /* HW offloaded queuing disciplines txq count and offset maps */ | |
689 | struct netdev_tc_txq { | |
690 | u16 count; | |
691 | u16 offset; | |
692 | }; | |
693 | ||
d314774c SH |
694 | /* |
695 | * This structure defines the management hooks for network devices. | |
00829823 SH |
696 | * The following hooks can be defined; unless noted otherwise, they are |
697 | * optional and can be filled with a null pointer. | |
d314774c SH |
698 | * |
699 | * int (*ndo_init)(struct net_device *dev); | |
700 | * This function is called once when network device is registered. | |
701 | * The network device can use this to any late stage initializaton | |
702 | * or semantic validattion. It can fail with an error code which will | |
703 | * be propogated back to register_netdev | |
704 | * | |
705 | * void (*ndo_uninit)(struct net_device *dev); | |
706 | * This function is called when device is unregistered or when registration | |
707 | * fails. It is not called if init fails. | |
708 | * | |
709 | * int (*ndo_open)(struct net_device *dev); | |
710 | * This function is called when network device transistions to the up | |
711 | * state. | |
712 | * | |
713 | * int (*ndo_stop)(struct net_device *dev); | |
714 | * This function is called when network device transistions to the down | |
715 | * state. | |
716 | * | |
dc1f8bf6 SH |
717 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
718 | * struct net_device *dev); | |
00829823 | 719 | * Called when a packet needs to be transmitted. |
dc1f8bf6 SH |
720 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
721 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) | |
00829823 SH |
722 | * Required can not be NULL. |
723 | * | |
724 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb); | |
725 | * Called to decide which queue to when device supports multiple | |
726 | * transmit queues. | |
727 | * | |
d314774c SH |
728 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
729 | * This function is called to allow device receiver to make | |
730 | * changes to configuration when multicast or promiscious is enabled. | |
731 | * | |
732 | * void (*ndo_set_rx_mode)(struct net_device *dev); | |
733 | * This function is called device changes address list filtering. | |
01789349 JP |
734 | * If driver handles unicast address filtering, it should set |
735 | * IFF_UNICAST_FLT to its priv_flags. | |
d314774c SH |
736 | * |
737 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); | |
738 | * This function is called when the Media Access Control address | |
37b607c5 | 739 | * needs to be changed. If this interface is not defined, the |
d314774c SH |
740 | * mac address can not be changed. |
741 | * | |
742 | * int (*ndo_validate_addr)(struct net_device *dev); | |
743 | * Test if Media Access Control address is valid for the device. | |
744 | * | |
745 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); | |
746 | * Called when a user request an ioctl which can't be handled by | |
747 | * the generic interface code. If not defined ioctl's return | |
748 | * not supported error code. | |
749 | * | |
750 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); | |
751 | * Used to set network devices bus interface parameters. This interface | |
752 | * is retained for legacy reason, new devices should use the bus | |
753 | * interface (PCI) for low level management. | |
754 | * | |
755 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); | |
756 | * Called when a user wants to change the Maximum Transfer Unit | |
757 | * of a device. If not defined, any request to change MTU will | |
758 | * will return an error. | |
759 | * | |
00829823 | 760 | * void (*ndo_tx_timeout)(struct net_device *dev); |
d314774c SH |
761 | * Callback uses when the transmitter has not made any progress |
762 | * for dev->watchdog ticks. | |
763 | * | |
3cfde79c | 764 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
28172739 | 765 | * struct rtnl_link_stats64 *storage); |
d308e38f | 766 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
d314774c | 767 | * Called when a user wants to get the network device usage |
be1f3c2c | 768 | * statistics. Drivers must do one of the following: |
3cfde79c BH |
769 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
770 | * rtnl_link_stats64 structure passed by the caller. | |
82695d9b | 771 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
be1f3c2c BH |
772 | * (which should normally be dev->stats) and return a pointer to |
773 | * it. The structure may be changed asynchronously only if each | |
774 | * field is written atomically. | |
775 | * 3. Update dev->stats asynchronously and atomically, and define | |
776 | * neither operation. | |
d314774c | 777 | * |
d314774c SH |
778 | * void (*ndo_vlan_rx_add_vid)(struct net_device *dev, unsigned short vid); |
779 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
780 | * this function is called when a VLAN id is registered. | |
781 | * | |
782 | * void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); | |
783 | * If device support VLAN filtering (dev->features & NETIF_F_HW_VLAN_FILTER) | |
784 | * this function is called when a VLAN id is unregistered. | |
785 | * | |
786 | * void (*ndo_poll_controller)(struct net_device *dev); | |
95c26df8 WM |
787 | * |
788 | * SR-IOV management functions. | |
789 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); | |
790 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); | |
791 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); | |
5f8444a3 | 792 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
95c26df8 WM |
793 | * int (*ndo_get_vf_config)(struct net_device *dev, |
794 | * int vf, struct ifla_vf_info *ivf); | |
57b61080 SF |
795 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
796 | * struct nlattr *port[]); | |
797 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); | |
4f57c087 JF |
798 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
799 | * Called to setup 'tc' number of traffic classes in the net device. This | |
800 | * is always called from the stack with the rtnl lock held and netif tx | |
801 | * queues stopped. This allows the netdevice to perform queue management | |
802 | * safely. | |
c445477d | 803 | * |
e9bce845 YZ |
804 | * Fiber Channel over Ethernet (FCoE) offload functions. |
805 | * int (*ndo_fcoe_enable)(struct net_device *dev); | |
806 | * Called when the FCoE protocol stack wants to start using LLD for FCoE | |
807 | * so the underlying device can perform whatever needed configuration or | |
808 | * initialization to support acceleration of FCoE traffic. | |
809 | * | |
810 | * int (*ndo_fcoe_disable)(struct net_device *dev); | |
811 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE | |
812 | * so the underlying device can perform whatever needed clean-ups to | |
813 | * stop supporting acceleration of FCoE traffic. | |
814 | * | |
815 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, | |
816 | * struct scatterlist *sgl, unsigned int sgc); | |
817 | * Called when the FCoE Initiator wants to initialize an I/O that | |
818 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
819 | * perform necessary setup and returns 1 to indicate the device is set up | |
820 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
821 | * | |
822 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); | |
823 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as | |
824 | * indicated by the FC exchange id 'xid', so the underlying device can | |
825 | * clean up and reuse resources for later DDP requests. | |
826 | * | |
827 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, | |
828 | * struct scatterlist *sgl, unsigned int sgc); | |
829 | * Called when the FCoE Target wants to initialize an I/O that | |
830 | * is a possible candidate for Direct Data Placement (DDP). The LLD can | |
831 | * perform necessary setup and returns 1 to indicate the device is set up | |
832 | * successfully to perform DDP on this I/O, otherwise this returns 0. | |
833 | * | |
834 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); | |
835 | * Called when the underlying device wants to override default World Wide | |
836 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own | |
837 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE | |
838 | * protocol stack to use. | |
839 | * | |
c445477d BH |
840 | * RFS acceleration. |
841 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, | |
842 | * u16 rxq_index, u32 flow_id); | |
843 | * Set hardware filter for RFS. rxq_index is the target queue index; | |
844 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. | |
845 | * Return the filter ID on success, or a negative error code. | |
fbaec0ea JP |
846 | * |
847 | * Slave management functions (for bridge, bonding, etc). User should | |
848 | * call netdev_set_master() to set dev->master properly. | |
849 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); | |
850 | * Called to make another netdev an underling. | |
851 | * | |
852 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); | |
853 | * Called to release previously enslaved netdev. | |
5455c699 MM |
854 | * |
855 | * Feature/offload setting functions. | |
c8f44aff MM |
856 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
857 | * netdev_features_t features); | |
5455c699 MM |
858 | * Adjusts the requested feature flags according to device-specific |
859 | * constraints, and returns the resulting flags. Must not modify | |
860 | * the device state. | |
861 | * | |
c8f44aff | 862 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
5455c699 MM |
863 | * Called to update device configuration to new features. Passed |
864 | * feature set might be less than what was returned by ndo_fix_features()). | |
865 | * Must return >0 or -errno if it changed dev->features itself. | |
866 | * | |
d314774c SH |
867 | */ |
868 | struct net_device_ops { | |
869 | int (*ndo_init)(struct net_device *dev); | |
870 | void (*ndo_uninit)(struct net_device *dev); | |
871 | int (*ndo_open)(struct net_device *dev); | |
872 | int (*ndo_stop)(struct net_device *dev); | |
dc1f8bf6 | 873 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
00829823 SH |
874 | struct net_device *dev); |
875 | u16 (*ndo_select_queue)(struct net_device *dev, | |
876 | struct sk_buff *skb); | |
d314774c SH |
877 | void (*ndo_change_rx_flags)(struct net_device *dev, |
878 | int flags); | |
d314774c | 879 | void (*ndo_set_rx_mode)(struct net_device *dev); |
d314774c SH |
880 | int (*ndo_set_mac_address)(struct net_device *dev, |
881 | void *addr); | |
d314774c | 882 | int (*ndo_validate_addr)(struct net_device *dev); |
d314774c SH |
883 | int (*ndo_do_ioctl)(struct net_device *dev, |
884 | struct ifreq *ifr, int cmd); | |
d314774c SH |
885 | int (*ndo_set_config)(struct net_device *dev, |
886 | struct ifmap *map); | |
00829823 SH |
887 | int (*ndo_change_mtu)(struct net_device *dev, |
888 | int new_mtu); | |
889 | int (*ndo_neigh_setup)(struct net_device *dev, | |
890 | struct neigh_parms *); | |
d314774c SH |
891 | void (*ndo_tx_timeout) (struct net_device *dev); |
892 | ||
28172739 ED |
893 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
894 | struct rtnl_link_stats64 *storage); | |
d314774c SH |
895 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
896 | ||
d314774c SH |
897 | void (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
898 | unsigned short vid); | |
899 | void (*ndo_vlan_rx_kill_vid)(struct net_device *dev, | |
900 | unsigned short vid); | |
901 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
d314774c | 902 | void (*ndo_poll_controller)(struct net_device *dev); |
4247e161 HX |
903 | int (*ndo_netpoll_setup)(struct net_device *dev, |
904 | struct netpoll_info *info); | |
0e34e931 | 905 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
d314774c | 906 | #endif |
95c26df8 WM |
907 | int (*ndo_set_vf_mac)(struct net_device *dev, |
908 | int queue, u8 *mac); | |
909 | int (*ndo_set_vf_vlan)(struct net_device *dev, | |
910 | int queue, u16 vlan, u8 qos); | |
911 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, | |
912 | int vf, int rate); | |
5f8444a3 GR |
913 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
914 | int vf, bool setting); | |
95c26df8 WM |
915 | int (*ndo_get_vf_config)(struct net_device *dev, |
916 | int vf, | |
917 | struct ifla_vf_info *ivf); | |
57b61080 SF |
918 | int (*ndo_set_vf_port)(struct net_device *dev, |
919 | int vf, | |
920 | struct nlattr *port[]); | |
921 | int (*ndo_get_vf_port)(struct net_device *dev, | |
922 | int vf, struct sk_buff *skb); | |
4f57c087 | 923 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
4d288d57 | 924 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
cb454399 YZ |
925 | int (*ndo_fcoe_enable)(struct net_device *dev); |
926 | int (*ndo_fcoe_disable)(struct net_device *dev); | |
4d288d57 YZ |
927 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
928 | u16 xid, | |
929 | struct scatterlist *sgl, | |
930 | unsigned int sgc); | |
931 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, | |
932 | u16 xid); | |
6247e086 YZ |
933 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
934 | u16 xid, | |
935 | struct scatterlist *sgl, | |
936 | unsigned int sgc); | |
3c9c36bc BPG |
937 | #endif |
938 | ||
939 | #if defined(CONFIG_LIBFCOE) || defined(CONFIG_LIBFCOE_MODULE) | |
df5c7945 YZ |
940 | #define NETDEV_FCOE_WWNN 0 |
941 | #define NETDEV_FCOE_WWPN 1 | |
942 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, | |
943 | u64 *wwn, int type); | |
4d288d57 | 944 | #endif |
3c9c36bc | 945 | |
c445477d BH |
946 | #ifdef CONFIG_RFS_ACCEL |
947 | int (*ndo_rx_flow_steer)(struct net_device *dev, | |
948 | const struct sk_buff *skb, | |
949 | u16 rxq_index, | |
950 | u32 flow_id); | |
951 | #endif | |
fbaec0ea JP |
952 | int (*ndo_add_slave)(struct net_device *dev, |
953 | struct net_device *slave_dev); | |
954 | int (*ndo_del_slave)(struct net_device *dev, | |
955 | struct net_device *slave_dev); | |
c8f44aff MM |
956 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
957 | netdev_features_t features); | |
5455c699 | 958 | int (*ndo_set_features)(struct net_device *dev, |
c8f44aff | 959 | netdev_features_t features); |
d314774c SH |
960 | }; |
961 | ||
1da177e4 LT |
962 | /* |
963 | * The DEVICE structure. | |
964 | * Actually, this whole structure is a big mistake. It mixes I/O | |
965 | * data with strictly "high-level" data, and it has to know about | |
966 | * almost every data structure used in the INET module. | |
967 | * | |
968 | * FIXME: cleanup struct net_device such that network protocol info | |
969 | * moves out. | |
970 | */ | |
971 | ||
d94d9fee | 972 | struct net_device { |
1da177e4 LT |
973 | |
974 | /* | |
975 | * This is the first field of the "visible" part of this structure | |
976 | * (i.e. as seen by users in the "Space.c" file). It is the name | |
724df615 | 977 | * of the interface. |
1da177e4 LT |
978 | */ |
979 | char name[IFNAMSIZ]; | |
ed77134b | 980 | |
cc749986 | 981 | struct pm_qos_request pm_qos_req; |
ed77134b | 982 | |
9356b8fc ED |
983 | /* device name hash chain */ |
984 | struct hlist_node name_hlist; | |
0b815a1a SH |
985 | /* snmp alias */ |
986 | char *ifalias; | |
1da177e4 LT |
987 | |
988 | /* | |
989 | * I/O specific fields | |
990 | * FIXME: Merge these and struct ifmap into one | |
991 | */ | |
992 | unsigned long mem_end; /* shared mem end */ | |
993 | unsigned long mem_start; /* shared mem start */ | |
994 | unsigned long base_addr; /* device I/O address */ | |
995 | unsigned int irq; /* device IRQ number */ | |
996 | ||
997 | /* | |
998 | * Some hardware also needs these fields, but they are not | |
999 | * part of the usual set specified in Space.c. | |
1000 | */ | |
1001 | ||
1da177e4 LT |
1002 | unsigned long state; |
1003 | ||
7562f876 | 1004 | struct list_head dev_list; |
bea3348e | 1005 | struct list_head napi_list; |
44a0873d | 1006 | struct list_head unreg_list; |
1da177e4 | 1007 | |
5455c699 | 1008 | /* currently active device features */ |
c8f44aff | 1009 | netdev_features_t features; |
5455c699 | 1010 | /* user-changeable features */ |
c8f44aff | 1011 | netdev_features_t hw_features; |
5455c699 | 1012 | /* user-requested features */ |
c8f44aff | 1013 | netdev_features_t wanted_features; |
1aac6267 | 1014 | /* mask of features inheritable by VLAN devices */ |
c8f44aff | 1015 | netdev_features_t vlan_features; |
04ed3e74 | 1016 | |
1da177e4 LT |
1017 | /* Interface index. Unique device identifier */ |
1018 | int ifindex; | |
1019 | int iflink; | |
1020 | ||
c45d286e | 1021 | struct net_device_stats stats; |
caf586e5 ED |
1022 | atomic_long_t rx_dropped; /* dropped packets by core network |
1023 | * Do not use this in drivers. | |
1024 | */ | |
1da177e4 | 1025 | |
b86e0280 | 1026 | #ifdef CONFIG_WIRELESS_EXT |
1da177e4 LT |
1027 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1028 | * See <net/iw_handler.h> for details. Jean II */ | |
1029 | const struct iw_handler_def * wireless_handlers; | |
1030 | /* Instance data managed by the core of Wireless Extensions. */ | |
1031 | struct iw_public_data * wireless_data; | |
b86e0280 | 1032 | #endif |
d314774c SH |
1033 | /* Management operations */ |
1034 | const struct net_device_ops *netdev_ops; | |
76fd8593 | 1035 | const struct ethtool_ops *ethtool_ops; |
1da177e4 | 1036 | |
3b04ddde SH |
1037 | /* Hardware header description */ |
1038 | const struct header_ops *header_ops; | |
1039 | ||
b00055aa | 1040 | unsigned int flags; /* interface flags (a la BSD) */ |
bdc220da | 1041 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. */ |
1da177e4 | 1042 | unsigned short gflags; |
1da177e4 LT |
1043 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1044 | ||
b00055aa SR |
1045 | unsigned char operstate; /* RFC2863 operstate */ |
1046 | unsigned char link_mode; /* mapping policy to operstate */ | |
1047 | ||
bdc220da JP |
1048 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1049 | unsigned char dma; /* DMA channel */ | |
1050 | ||
cd7b5396 | 1051 | unsigned int mtu; /* interface MTU value */ |
1da177e4 LT |
1052 | unsigned short type; /* interface hardware type */ |
1053 | unsigned short hard_header_len; /* hardware hdr length */ | |
1da177e4 | 1054 | |
f5184d26 JB |
1055 | /* extra head- and tailroom the hardware may need, but not in all cases |
1056 | * can this be guaranteed, especially tailroom. Some cases also use | |
1057 | * LL_MAX_HEADER instead to allocate the skb. | |
1058 | */ | |
1059 | unsigned short needed_headroom; | |
1060 | unsigned short needed_tailroom; | |
1061 | ||
1da177e4 | 1062 | /* Interface address info. */ |
a6f9a705 | 1063 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
c1f79426 | 1064 | unsigned char addr_assign_type; /* hw address assignment type */ |
1da177e4 LT |
1065 | unsigned char addr_len; /* hardware address length */ |
1066 | unsigned short dev_id; /* for shared network cards */ | |
1067 | ||
ccffad25 | 1068 | spinlock_t addr_list_lock; |
22bedad3 JP |
1069 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1070 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ | |
2d348d1f | 1071 | bool uc_promisc; |
9d45abe1 WC |
1072 | unsigned int promiscuity; |
1073 | unsigned int allmulti; | |
1da177e4 | 1074 | |
1da177e4 LT |
1075 | |
1076 | /* Protocol specific pointers */ | |
65ac6a5f JG |
1077 | |
1078 | #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) | |
b616b09a | 1079 | struct vlan_group __rcu *vlgrp; /* VLAN group */ |
65ac6a5f | 1080 | #endif |
91da11f8 LB |
1081 | #ifdef CONFIG_NET_DSA |
1082 | void *dsa_ptr; /* dsa specific data */ | |
1083 | #endif | |
1da177e4 | 1084 | void *atalk_ptr; /* AppleTalk link */ |
95ae6b22 | 1085 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
fc766e4c | 1086 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
198caeca | 1087 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1da177e4 LT |
1088 | void *ec_ptr; /* Econet specific data */ |
1089 | void *ax25_ptr; /* AX.25 specific data */ | |
704232c2 JB |
1090 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1091 | assign before registering */ | |
1da177e4 | 1092 | |
9356b8fc | 1093 | /* |
cd13539b | 1094 | * Cache lines mostly used on receive path (including eth_type_trans()) |
9356b8fc | 1095 | */ |
4dc89133 ED |
1096 | unsigned long last_rx; /* Time of last Rx |
1097 | * This should not be set in | |
1098 | * drivers, unless really needed, | |
1099 | * because network stack (bonding) | |
1100 | * use it if/when necessary, to | |
1101 | * avoid dirtying this cache line. | |
1102 | */ | |
1103 | ||
cd13539b ED |
1104 | struct net_device *master; /* Pointer to master device of a group, |
1105 | * which this device is member of. | |
1106 | */ | |
1107 | ||
9356b8fc | 1108 | /* Interface address info used in eth_type_trans() */ |
f001fde5 JP |
1109 | unsigned char *dev_addr; /* hw address, (before bcast |
1110 | because most packets are | |
1111 | unicast) */ | |
1112 | ||
31278e71 JP |
1113 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1114 | hw addresses */ | |
9356b8fc ED |
1115 | |
1116 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ | |
1da177e4 | 1117 | |
ccf5ff69 | 1118 | #ifdef CONFIG_SYSFS |
0a9627f2 | 1119 | struct kset *queues_kset; |
ccf5ff69 | 1120 | #endif |
0a9627f2 | 1121 | |
ccf5ff69 | 1122 | #ifdef CONFIG_RPS |
0a9627f2 TH |
1123 | struct netdev_rx_queue *_rx; |
1124 | ||
62fe0b40 | 1125 | /* Number of RX queues allocated at register_netdev() time */ |
0a9627f2 | 1126 | unsigned int num_rx_queues; |
62fe0b40 BH |
1127 | |
1128 | /* Number of RX queues currently active in device */ | |
1129 | unsigned int real_num_rx_queues; | |
c445477d BH |
1130 | |
1131 | #ifdef CONFIG_RFS_ACCEL | |
1132 | /* CPU reverse-mapping for RX completion interrupts, indexed | |
1133 | * by RX queue number. Assigned by driver. This must only be | |
1134 | * set if the ndo_rx_flow_steer operation is defined. */ | |
1135 | struct cpu_rmap *rx_cpu_rmap; | |
1136 | #endif | |
df334545 | 1137 | #endif |
0a9627f2 | 1138 | |
61391cde | 1139 | rx_handler_func_t __rcu *rx_handler; |
1140 | void __rcu *rx_handler_data; | |
e8a0464c | 1141 | |
24824a09 | 1142 | struct netdev_queue __rcu *ingress_queue; |
cd13539b ED |
1143 | |
1144 | /* | |
1145 | * Cache lines mostly used on transmit path | |
1146 | */ | |
e8a0464c | 1147 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
fd2ea0a7 DM |
1148 | |
1149 | /* Number of TX queues allocated at alloc_netdev_mq() time */ | |
e8a0464c | 1150 | unsigned int num_tx_queues; |
fd2ea0a7 DM |
1151 | |
1152 | /* Number of TX queues currently active in device */ | |
1153 | unsigned int real_num_tx_queues; | |
1154 | ||
af356afa PM |
1155 | /* root qdisc from userspace point of view */ |
1156 | struct Qdisc *qdisc; | |
1157 | ||
1da177e4 | 1158 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
c3f26a26 | 1159 | spinlock_t tx_global_lock; |
cd13539b | 1160 | |
bf264145 | 1161 | #ifdef CONFIG_XPS |
a4177869 | 1162 | struct xps_dev_maps __rcu *xps_maps; |
bf264145 | 1163 | #endif |
1d24eb48 | 1164 | |
9356b8fc | 1165 | /* These may be needed for future network-power-down code. */ |
9d21493b ED |
1166 | |
1167 | /* | |
1168 | * trans_start here is expensive for high speed devices on SMP, | |
1169 | * please use netdev_queue->trans_start instead. | |
1170 | */ | |
9356b8fc ED |
1171 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1172 | ||
1173 | int watchdog_timeo; /* used by dev_watchdog() */ | |
1174 | struct timer_list watchdog_timer; | |
1175 | ||
1da177e4 | 1176 | /* Number of references to this device */ |
29b4433d | 1177 | int __percpu *pcpu_refcnt; |
9356b8fc | 1178 | |
1da177e4 LT |
1179 | /* delayed register/unregister */ |
1180 | struct list_head todo_list; | |
1da177e4 LT |
1181 | /* device index hash chain */ |
1182 | struct hlist_node index_hlist; | |
1183 | ||
e014debe | 1184 | struct list_head link_watch_list; |
572a103d | 1185 | |
1da177e4 LT |
1186 | /* register/unregister state machine */ |
1187 | enum { NETREG_UNINITIALIZED=0, | |
b17a7c17 | 1188 | NETREG_REGISTERED, /* completed register_netdevice */ |
1da177e4 LT |
1189 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1190 | NETREG_UNREGISTERED, /* completed unregister todo */ | |
1191 | NETREG_RELEASED, /* called free_netdev */ | |
937f1ba5 | 1192 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
449f4544 ED |
1193 | } reg_state:8; |
1194 | ||
1195 | bool dismantle; /* device is going do be freed */ | |
a2835763 PM |
1196 | |
1197 | enum { | |
1198 | RTNL_LINK_INITIALIZED, | |
1199 | RTNL_LINK_INITIALIZING, | |
1200 | } rtnl_link_state:16; | |
1da177e4 | 1201 | |
d314774c SH |
1202 | /* Called from unregister, can be used to call free_netdev */ |
1203 | void (*destructor)(struct net_device *dev); | |
1da177e4 | 1204 | |
1da177e4 | 1205 | #ifdef CONFIG_NETPOLL |
115c1d6e | 1206 | struct netpoll_info *npinfo; |
1da177e4 | 1207 | #endif |
eae792b7 | 1208 | |
c346dca1 | 1209 | #ifdef CONFIG_NET_NS |
4a1c5371 EB |
1210 | /* Network namespace this network device is inside */ |
1211 | struct net *nd_net; | |
c346dca1 | 1212 | #endif |
4a1c5371 | 1213 | |
4951704b | 1214 | /* mid-layer private */ |
a7855c78 ED |
1215 | union { |
1216 | void *ml_priv; | |
1217 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ | |
290b895e | 1218 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
6d81f41c | 1219 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
a7855c78 | 1220 | }; |
eca9ebac | 1221 | /* GARP */ |
3cc77ec7 | 1222 | struct garp_port __rcu *garp_port; |
1da177e4 | 1223 | |
1da177e4 | 1224 | /* class/net/name entry */ |
43cb76d9 | 1225 | struct device dev; |
0c509a6c EB |
1226 | /* space for optional device, statistics, and wireless sysfs groups */ |
1227 | const struct attribute_group *sysfs_groups[4]; | |
38f7b870 PM |
1228 | |
1229 | /* rtnetlink link ops */ | |
1230 | const struct rtnl_link_ops *rtnl_link_ops; | |
f25f4e44 | 1231 | |
82cc1a7a PWJ |
1232 | /* for setting kernel sock attribute on TCP connection setup */ |
1233 | #define GSO_MAX_SIZE 65536 | |
1234 | unsigned int gso_max_size; | |
d314774c | 1235 | |
7a6b6f51 | 1236 | #ifdef CONFIG_DCB |
2f90b865 | 1237 | /* Data Center Bridging netlink ops */ |
32953543 | 1238 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2f90b865 | 1239 | #endif |
4f57c087 JF |
1240 | u8 num_tc; |
1241 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; | |
1242 | u8 prio_tc_map[TC_BITMASK + 1]; | |
2f90b865 | 1243 | |
4d288d57 YZ |
1244 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
1245 | /* max exchange id for FCoE LRO by ddp */ | |
1246 | unsigned int fcoe_ddp_xid; | |
1247 | #endif | |
c1f19b51 RC |
1248 | /* phy device may attach itself for hardware timestamping */ |
1249 | struct phy_device *phydev; | |
cbda10fa VD |
1250 | |
1251 | /* group the device belongs to */ | |
1252 | int group; | |
1da177e4 | 1253 | }; |
43cb76d9 | 1254 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1da177e4 LT |
1255 | |
1256 | #define NETDEV_ALIGN 32 | |
1da177e4 | 1257 | |
4f57c087 JF |
1258 | static inline |
1259 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) | |
1260 | { | |
1261 | return dev->prio_tc_map[prio & TC_BITMASK]; | |
1262 | } | |
1263 | ||
1264 | static inline | |
1265 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) | |
1266 | { | |
1267 | if (tc >= dev->num_tc) | |
1268 | return -EINVAL; | |
1269 | ||
1270 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static inline | |
1275 | void netdev_reset_tc(struct net_device *dev) | |
1276 | { | |
1277 | dev->num_tc = 0; | |
1278 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); | |
1279 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); | |
1280 | } | |
1281 | ||
1282 | static inline | |
1283 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) | |
1284 | { | |
1285 | if (tc >= dev->num_tc) | |
1286 | return -EINVAL; | |
1287 | ||
1288 | dev->tc_to_txq[tc].count = count; | |
1289 | dev->tc_to_txq[tc].offset = offset; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static inline | |
1294 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) | |
1295 | { | |
1296 | if (num_tc > TC_MAX_QUEUE) | |
1297 | return -EINVAL; | |
1298 | ||
1299 | dev->num_tc = num_tc; | |
1300 | return 0; | |
1301 | } | |
1302 | ||
1303 | static inline | |
1304 | int netdev_get_num_tc(struct net_device *dev) | |
1305 | { | |
1306 | return dev->num_tc; | |
1307 | } | |
1308 | ||
e8a0464c DM |
1309 | static inline |
1310 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, | |
1311 | unsigned int index) | |
1312 | { | |
1313 | return &dev->_tx[index]; | |
1314 | } | |
1315 | ||
1316 | static inline void netdev_for_each_tx_queue(struct net_device *dev, | |
1317 | void (*f)(struct net_device *, | |
1318 | struct netdev_queue *, | |
1319 | void *), | |
1320 | void *arg) | |
1321 | { | |
1322 | unsigned int i; | |
1323 | ||
1324 | for (i = 0; i < dev->num_tx_queues; i++) | |
1325 | f(dev, &dev->_tx[i], arg); | |
1326 | } | |
1327 | ||
c346dca1 YH |
1328 | /* |
1329 | * Net namespace inlines | |
1330 | */ | |
1331 | static inline | |
1332 | struct net *dev_net(const struct net_device *dev) | |
1333 | { | |
c2d9ba9b | 1334 | return read_pnet(&dev->nd_net); |
c346dca1 YH |
1335 | } |
1336 | ||
1337 | static inline | |
f5aa23fd | 1338 | void dev_net_set(struct net_device *dev, struct net *net) |
c346dca1 YH |
1339 | { |
1340 | #ifdef CONFIG_NET_NS | |
f3005d7f DL |
1341 | release_net(dev->nd_net); |
1342 | dev->nd_net = hold_net(net); | |
c346dca1 YH |
1343 | #endif |
1344 | } | |
1345 | ||
cf85d08f LB |
1346 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1347 | { | |
1348 | #ifdef CONFIG_NET_DSA_TAG_DSA | |
1349 | if (dev->dsa_ptr != NULL) | |
1350 | return dsa_uses_dsa_tags(dev->dsa_ptr); | |
1351 | #endif | |
1352 | ||
1353 | return 0; | |
1354 | } | |
1355 | ||
8a83a00b AB |
1356 | #ifndef CONFIG_NET_NS |
1357 | static inline void skb_set_dev(struct sk_buff *skb, struct net_device *dev) | |
1358 | { | |
1359 | skb->dev = dev; | |
1360 | } | |
1361 | #else /* CONFIG_NET_NS */ | |
1362 | void skb_set_dev(struct sk_buff *skb, struct net_device *dev); | |
1363 | #endif | |
1364 | ||
396138f0 LB |
1365 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1366 | { | |
1367 | #ifdef CONFIG_NET_DSA_TAG_TRAILER | |
1368 | if (dev->dsa_ptr != NULL) | |
1369 | return dsa_uses_trailer_tags(dev->dsa_ptr); | |
1370 | #endif | |
1371 | ||
1372 | return 0; | |
1373 | } | |
1374 | ||
bea3348e SH |
1375 | /** |
1376 | * netdev_priv - access network device private data | |
1377 | * @dev: network device | |
1378 | * | |
1379 | * Get network device private data | |
1380 | */ | |
6472ce60 | 1381 | static inline void *netdev_priv(const struct net_device *dev) |
1da177e4 | 1382 | { |
1ce8e7b5 | 1383 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1da177e4 LT |
1384 | } |
1385 | ||
1da177e4 LT |
1386 | /* Set the sysfs physical device reference for the network logical device |
1387 | * if set prior to registration will cause a symlink during initialization. | |
1388 | */ | |
43cb76d9 | 1389 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1da177e4 | 1390 | |
384912ed MH |
1391 | /* Set the sysfs device type for the network logical device to allow |
1392 | * fin grained indentification of different network device types. For | |
1393 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. | |
1394 | */ | |
1395 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) | |
1396 | ||
3b582cc1 SH |
1397 | /** |
1398 | * netif_napi_add - initialize a napi context | |
1399 | * @dev: network device | |
1400 | * @napi: napi context | |
1401 | * @poll: polling function | |
1402 | * @weight: default weight | |
1403 | * | |
1404 | * netif_napi_add() must be used to initialize a napi context prior to calling | |
1405 | * *any* of the other napi related functions. | |
1406 | */ | |
d565b0a1 HX |
1407 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1408 | int (*poll)(struct napi_struct *, int), int weight); | |
bea3348e | 1409 | |
d8156534 AD |
1410 | /** |
1411 | * netif_napi_del - remove a napi context | |
1412 | * @napi: napi context | |
1413 | * | |
1414 | * netif_napi_del() removes a napi context from the network device napi list | |
1415 | */ | |
d565b0a1 HX |
1416 | void netif_napi_del(struct napi_struct *napi); |
1417 | ||
1418 | struct napi_gro_cb { | |
78a478d0 HX |
1419 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1420 | void *frag0; | |
1421 | ||
7489594c HX |
1422 | /* Length of frag0. */ |
1423 | unsigned int frag0_len; | |
1424 | ||
86911732 HX |
1425 | /* This indicates where we are processing relative to skb->data. */ |
1426 | int data_offset; | |
1427 | ||
d565b0a1 HX |
1428 | /* This is non-zero if the packet may be of the same flow. */ |
1429 | int same_flow; | |
1430 | ||
1431 | /* This is non-zero if the packet cannot be merged with the new skb. */ | |
1432 | int flush; | |
1433 | ||
1434 | /* Number of segments aggregated. */ | |
1435 | int count; | |
5d38a079 HX |
1436 | |
1437 | /* Free the skb? */ | |
1438 | int free; | |
d565b0a1 HX |
1439 | }; |
1440 | ||
1441 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) | |
d8156534 | 1442 | |
1da177e4 | 1443 | struct packet_type { |
f2ccd8fa DM |
1444 | __be16 type; /* This is really htons(ether_type). */ |
1445 | struct net_device *dev; /* NULL is wildcarded here */ | |
1446 | int (*func) (struct sk_buff *, | |
1447 | struct net_device *, | |
1448 | struct packet_type *, | |
1449 | struct net_device *); | |
576a30eb | 1450 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
c8f44aff | 1451 | netdev_features_t features); |
a430a43d | 1452 | int (*gso_send_check)(struct sk_buff *skb); |
d565b0a1 HX |
1453 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1454 | struct sk_buff *skb); | |
1455 | int (*gro_complete)(struct sk_buff *skb); | |
1da177e4 LT |
1456 | void *af_packet_priv; |
1457 | struct list_head list; | |
1458 | }; | |
1459 | ||
1da177e4 LT |
1460 | #include <linux/notifier.h> |
1461 | ||
dcfe1421 AW |
1462 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1463 | * notification exclusion list in rtnetlink_event() when adding new | |
1464 | * types. | |
1465 | */ | |
1466 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ | |
1467 | #define NETDEV_DOWN 0x0002 | |
1468 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface | |
1469 | detected a hardware crash and restarted | |
1470 | - we can use this eg to kick tcp sessions | |
1471 | once done */ | |
1472 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ | |
1473 | #define NETDEV_REGISTER 0x0005 | |
1474 | #define NETDEV_UNREGISTER 0x0006 | |
1475 | #define NETDEV_CHANGEMTU 0x0007 | |
1476 | #define NETDEV_CHANGEADDR 0x0008 | |
1477 | #define NETDEV_GOING_DOWN 0x0009 | |
1478 | #define NETDEV_CHANGENAME 0x000A | |
1479 | #define NETDEV_FEAT_CHANGE 0x000B | |
1480 | #define NETDEV_BONDING_FAILOVER 0x000C | |
1481 | #define NETDEV_PRE_UP 0x000D | |
1482 | #define NETDEV_PRE_TYPE_CHANGE 0x000E | |
1483 | #define NETDEV_POST_TYPE_CHANGE 0x000F | |
1484 | #define NETDEV_POST_INIT 0x0010 | |
1485 | #define NETDEV_UNREGISTER_BATCH 0x0011 | |
1486 | #define NETDEV_RELEASE 0x0012 | |
1487 | #define NETDEV_NOTIFY_PEERS 0x0013 | |
1488 | #define NETDEV_JOIN 0x0014 | |
1489 | ||
1490 | extern int register_netdevice_notifier(struct notifier_block *nb); | |
1491 | extern int unregister_netdevice_notifier(struct notifier_block *nb); | |
1492 | extern int call_netdevice_notifiers(unsigned long val, struct net_device *dev); | |
1493 | ||
1494 | ||
1da177e4 LT |
1495 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1496 | ||
7562f876 | 1497 | |
881d966b EB |
1498 | #define for_each_netdev(net, d) \ |
1499 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) | |
dcbccbd4 EB |
1500 | #define for_each_netdev_reverse(net, d) \ |
1501 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) | |
c6d14c84 ED |
1502 | #define for_each_netdev_rcu(net, d) \ |
1503 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b EB |
1504 | #define for_each_netdev_safe(net, d, n) \ |
1505 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) | |
1506 | #define for_each_netdev_continue(net, d) \ | |
1507 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) | |
254245d2 | 1508 | #define for_each_netdev_continue_rcu(net, d) \ |
1509 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) | |
881d966b | 1510 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
7562f876 | 1511 | |
a050c33f DL |
1512 | static inline struct net_device *next_net_device(struct net_device *dev) |
1513 | { | |
1514 | struct list_head *lh; | |
1515 | struct net *net; | |
1516 | ||
c346dca1 | 1517 | net = dev_net(dev); |
a050c33f DL |
1518 | lh = dev->dev_list.next; |
1519 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1520 | } | |
1521 | ||
ce81b76a ED |
1522 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1523 | { | |
1524 | struct list_head *lh; | |
1525 | struct net *net; | |
1526 | ||
1527 | net = dev_net(dev); | |
ccf43438 | 1528 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
ce81b76a ED |
1529 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1530 | } | |
1531 | ||
a050c33f DL |
1532 | static inline struct net_device *first_net_device(struct net *net) |
1533 | { | |
1534 | return list_empty(&net->dev_base_head) ? NULL : | |
1535 | net_device_entry(net->dev_base_head.next); | |
1536 | } | |
7562f876 | 1537 | |
ccf43438 ED |
1538 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1539 | { | |
1540 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); | |
1541 | ||
1542 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); | |
1543 | } | |
1544 | ||
1da177e4 LT |
1545 | extern int netdev_boot_setup_check(struct net_device *dev); |
1546 | extern unsigned long netdev_boot_base(const char *prefix, int unit); | |
941666c2 ED |
1547 | extern struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
1548 | const char *hwaddr); | |
881d966b EB |
1549 | extern struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
1550 | extern struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); | |
1da177e4 LT |
1551 | extern void dev_add_pack(struct packet_type *pt); |
1552 | extern void dev_remove_pack(struct packet_type *pt); | |
1553 | extern void __dev_remove_pack(struct packet_type *pt); | |
1554 | ||
bb69ae04 ED |
1555 | extern struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
1556 | unsigned short mask); | |
881d966b | 1557 | extern struct net_device *dev_get_by_name(struct net *net, const char *name); |
72c9528b | 1558 | extern struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
881d966b | 1559 | extern struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1da177e4 LT |
1560 | extern int dev_alloc_name(struct net_device *dev, const char *name); |
1561 | extern int dev_open(struct net_device *dev); | |
1562 | extern int dev_close(struct net_device *dev); | |
0187bdfb | 1563 | extern void dev_disable_lro(struct net_device *dev); |
1da177e4 LT |
1564 | extern int dev_queue_xmit(struct sk_buff *skb); |
1565 | extern int register_netdevice(struct net_device *dev); | |
44a0873d ED |
1566 | extern void unregister_netdevice_queue(struct net_device *dev, |
1567 | struct list_head *head); | |
9b5e383c | 1568 | extern void unregister_netdevice_many(struct list_head *head); |
44a0873d ED |
1569 | static inline void unregister_netdevice(struct net_device *dev) |
1570 | { | |
1571 | unregister_netdevice_queue(dev, NULL); | |
1572 | } | |
1573 | ||
29b4433d | 1574 | extern int netdev_refcnt_read(const struct net_device *dev); |
1da177e4 LT |
1575 | extern void free_netdev(struct net_device *dev); |
1576 | extern void synchronize_net(void); | |
937f1ba5 | 1577 | extern int init_dummy_netdev(struct net_device *dev); |
9d40bbda | 1578 | extern void netdev_resync_ops(struct net_device *dev); |
937f1ba5 | 1579 | |
881d966b EB |
1580 | extern struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1581 | extern struct net_device *__dev_get_by_index(struct net *net, int ifindex); | |
fb699dfd | 1582 | extern struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
1da177e4 LT |
1583 | extern int dev_restart(struct net_device *dev); |
1584 | #ifdef CONFIG_NETPOLL_TRAP | |
1585 | extern int netpoll_trap(void); | |
1586 | #endif | |
86911732 HX |
1587 | extern int skb_gro_receive(struct sk_buff **head, |
1588 | struct sk_buff *skb); | |
78a478d0 | 1589 | extern void skb_gro_reset_offset(struct sk_buff *skb); |
86911732 HX |
1590 | |
1591 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) | |
1592 | { | |
1593 | return NAPI_GRO_CB(skb)->data_offset; | |
1594 | } | |
1595 | ||
1596 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) | |
1597 | { | |
1598 | return skb->len - NAPI_GRO_CB(skb)->data_offset; | |
1599 | } | |
1600 | ||
1601 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) | |
1602 | { | |
1603 | NAPI_GRO_CB(skb)->data_offset += len; | |
1604 | } | |
1605 | ||
a5b1cf28 HX |
1606 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1607 | unsigned int offset) | |
86911732 | 1608 | { |
a5b1cf28 HX |
1609 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1610 | } | |
78a478d0 | 1611 | |
a5b1cf28 HX |
1612 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1613 | { | |
1614 | return NAPI_GRO_CB(skb)->frag0_len < hlen; | |
1615 | } | |
78a478d0 | 1616 | |
a5b1cf28 HX |
1617 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1618 | unsigned int offset) | |
1619 | { | |
17dd759c HX |
1620 | if (!pskb_may_pull(skb, hlen)) |
1621 | return NULL; | |
1622 | ||
a5b1cf28 HX |
1623 | NAPI_GRO_CB(skb)->frag0 = NULL; |
1624 | NAPI_GRO_CB(skb)->frag0_len = 0; | |
17dd759c | 1625 | return skb->data + offset; |
86911732 | 1626 | } |
1da177e4 | 1627 | |
aa4b9f53 HX |
1628 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1629 | { | |
78d3fd0b | 1630 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
aa4b9f53 HX |
1631 | } |
1632 | ||
36e7b1b8 HX |
1633 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1634 | { | |
78d3fd0b HX |
1635 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1636 | skb_network_offset(skb); | |
36e7b1b8 HX |
1637 | } |
1638 | ||
0c4e8581 SH |
1639 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1640 | unsigned short type, | |
3b04ddde SH |
1641 | const void *daddr, const void *saddr, |
1642 | unsigned len) | |
0c4e8581 | 1643 | { |
f1ecfd5d | 1644 | if (!dev->header_ops || !dev->header_ops->create) |
0c4e8581 | 1645 | return 0; |
3b04ddde SH |
1646 | |
1647 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); | |
0c4e8581 SH |
1648 | } |
1649 | ||
b95cce35 SH |
1650 | static inline int dev_parse_header(const struct sk_buff *skb, |
1651 | unsigned char *haddr) | |
1652 | { | |
1653 | const struct net_device *dev = skb->dev; | |
1654 | ||
1b83336b | 1655 | if (!dev->header_ops || !dev->header_ops->parse) |
b95cce35 | 1656 | return 0; |
3b04ddde | 1657 | return dev->header_ops->parse(skb, haddr); |
b95cce35 SH |
1658 | } |
1659 | ||
1da177e4 LT |
1660 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1661 | extern int register_gifconf(unsigned int family, gifconf_func_t * gifconf); | |
1662 | static inline int unregister_gifconf(unsigned int family) | |
1663 | { | |
1664 | return register_gifconf(family, NULL); | |
1665 | } | |
1666 | ||
1667 | /* | |
88751275 | 1668 | * Incoming packets are placed on per-cpu queues |
1da177e4 | 1669 | */ |
d94d9fee | 1670 | struct softnet_data { |
37437bb2 | 1671 | struct Qdisc *output_queue; |
a9cbd588 | 1672 | struct Qdisc **output_queue_tailp; |
1da177e4 | 1673 | struct list_head poll_list; |
1da177e4 | 1674 | struct sk_buff *completion_queue; |
6e7676c1 | 1675 | struct sk_buff_head process_queue; |
1da177e4 | 1676 | |
dee42870 | 1677 | /* stats */ |
cd7b5396 DM |
1678 | unsigned int processed; |
1679 | unsigned int time_squeeze; | |
1680 | unsigned int cpu_collision; | |
1681 | unsigned int received_rps; | |
dee42870 | 1682 | |
fd793d89 | 1683 | #ifdef CONFIG_RPS |
88751275 ED |
1684 | struct softnet_data *rps_ipi_list; |
1685 | ||
1686 | /* Elements below can be accessed between CPUs for RPS */ | |
0a9627f2 | 1687 | struct call_single_data csd ____cacheline_aligned_in_smp; |
88751275 ED |
1688 | struct softnet_data *rps_ipi_next; |
1689 | unsigned int cpu; | |
fec5e652 | 1690 | unsigned int input_queue_head; |
76cc8b13 | 1691 | unsigned int input_queue_tail; |
1e94d72f | 1692 | #endif |
dee42870 | 1693 | unsigned dropped; |
0a9627f2 | 1694 | struct sk_buff_head input_pkt_queue; |
bea3348e | 1695 | struct napi_struct backlog; |
1da177e4 LT |
1696 | }; |
1697 | ||
76cc8b13 | 1698 | static inline void input_queue_head_incr(struct softnet_data *sd) |
fec5e652 TH |
1699 | { |
1700 | #ifdef CONFIG_RPS | |
76cc8b13 TH |
1701 | sd->input_queue_head++; |
1702 | #endif | |
1703 | } | |
1704 | ||
1705 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, | |
1706 | unsigned int *qtail) | |
1707 | { | |
1708 | #ifdef CONFIG_RPS | |
1709 | *qtail = ++sd->input_queue_tail; | |
fec5e652 TH |
1710 | #endif |
1711 | } | |
1712 | ||
0a9627f2 | 1713 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1da177e4 | 1714 | |
37437bb2 | 1715 | extern void __netif_schedule(struct Qdisc *q); |
1da177e4 | 1716 | |
86d804e1 | 1717 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
1da177e4 | 1718 | { |
79d16385 | 1719 | if (!test_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1720 | __netif_schedule(txq->qdisc); |
86d804e1 DM |
1721 | } |
1722 | ||
fd2ea0a7 DM |
1723 | static inline void netif_tx_schedule_all(struct net_device *dev) |
1724 | { | |
1725 | unsigned int i; | |
1726 | ||
1727 | for (i = 0; i < dev->num_tx_queues; i++) | |
1728 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); | |
1729 | } | |
1730 | ||
d29f749e DJ |
1731 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
1732 | { | |
1733 | clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1734 | } | |
1735 | ||
bea3348e SH |
1736 | /** |
1737 | * netif_start_queue - allow transmit | |
1738 | * @dev: network device | |
1739 | * | |
1740 | * Allow upper layers to call the device hard_start_xmit routine. | |
1741 | */ | |
1da177e4 LT |
1742 | static inline void netif_start_queue(struct net_device *dev) |
1743 | { | |
e8a0464c | 1744 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1745 | } |
1746 | ||
fd2ea0a7 DM |
1747 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
1748 | { | |
1749 | unsigned int i; | |
1750 | ||
1751 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1752 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1753 | netif_tx_start_queue(txq); | |
1754 | } | |
1755 | } | |
1756 | ||
79d16385 | 1757 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
1da177e4 LT |
1758 | { |
1759 | #ifdef CONFIG_NETPOLL_TRAP | |
5f286e11 | 1760 | if (netpoll_trap()) { |
7b3d3e4f | 1761 | netif_tx_start_queue(dev_queue); |
1da177e4 | 1762 | return; |
5f286e11 | 1763 | } |
1da177e4 | 1764 | #endif |
79d16385 | 1765 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &dev_queue->state)) |
37437bb2 | 1766 | __netif_schedule(dev_queue->qdisc); |
79d16385 DM |
1767 | } |
1768 | ||
d29f749e DJ |
1769 | /** |
1770 | * netif_wake_queue - restart transmit | |
1771 | * @dev: network device | |
1772 | * | |
1773 | * Allow upper layers to call the device hard_start_xmit routine. | |
1774 | * Used for flow control when transmit resources are available. | |
1775 | */ | |
79d16385 DM |
1776 | static inline void netif_wake_queue(struct net_device *dev) |
1777 | { | |
e8a0464c | 1778 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1779 | } |
1780 | ||
fd2ea0a7 DM |
1781 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
1782 | { | |
1783 | unsigned int i; | |
1784 | ||
1785 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1786 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1787 | netif_tx_wake_queue(txq); | |
1788 | } | |
1789 | } | |
1790 | ||
d29f749e DJ |
1791 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
1792 | { | |
18543a64 | 1793 | if (WARN_ON(!dev_queue)) { |
256ee435 | 1794 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
18543a64 GC |
1795 | return; |
1796 | } | |
d29f749e DJ |
1797 | set_bit(__QUEUE_STATE_XOFF, &dev_queue->state); |
1798 | } | |
1799 | ||
bea3348e SH |
1800 | /** |
1801 | * netif_stop_queue - stop transmitted packets | |
1802 | * @dev: network device | |
1803 | * | |
1804 | * Stop upper layers calling the device hard_start_xmit routine. | |
1805 | * Used for flow control when transmit resources are unavailable. | |
1806 | */ | |
1da177e4 LT |
1807 | static inline void netif_stop_queue(struct net_device *dev) |
1808 | { | |
e8a0464c | 1809 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1810 | } |
1811 | ||
fd2ea0a7 DM |
1812 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
1813 | { | |
1814 | unsigned int i; | |
1815 | ||
1816 | for (i = 0; i < dev->num_tx_queues; i++) { | |
1817 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
1818 | netif_tx_stop_queue(txq); | |
1819 | } | |
1820 | } | |
1821 | ||
d29f749e DJ |
1822 | static inline int netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
1823 | { | |
1824 | return test_bit(__QUEUE_STATE_XOFF, &dev_queue->state); | |
1825 | } | |
1826 | ||
bea3348e SH |
1827 | /** |
1828 | * netif_queue_stopped - test if transmit queue is flowblocked | |
1829 | * @dev: network device | |
1830 | * | |
1831 | * Test if transmit queue on device is currently unable to send. | |
1832 | */ | |
1da177e4 LT |
1833 | static inline int netif_queue_stopped(const struct net_device *dev) |
1834 | { | |
e8a0464c | 1835 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
1da177e4 LT |
1836 | } |
1837 | ||
5a0d2268 | 1838 | static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue) |
c3f26a26 | 1839 | { |
5a0d2268 | 1840 | return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN; |
c3f26a26 DM |
1841 | } |
1842 | ||
bea3348e SH |
1843 | /** |
1844 | * netif_running - test if up | |
1845 | * @dev: network device | |
1846 | * | |
1847 | * Test if the device has been brought up. | |
1848 | */ | |
1da177e4 LT |
1849 | static inline int netif_running(const struct net_device *dev) |
1850 | { | |
1851 | return test_bit(__LINK_STATE_START, &dev->state); | |
1852 | } | |
1853 | ||
f25f4e44 PWJ |
1854 | /* |
1855 | * Routines to manage the subqueues on a device. We only need start | |
1856 | * stop, and a check if it's stopped. All other device management is | |
1857 | * done at the overall netdevice level. | |
1858 | * Also test the device if we're multiqueue. | |
1859 | */ | |
bea3348e SH |
1860 | |
1861 | /** | |
1862 | * netif_start_subqueue - allow sending packets on subqueue | |
1863 | * @dev: network device | |
1864 | * @queue_index: sub queue index | |
1865 | * | |
1866 | * Start individual transmit queue of a device with multiple transmit queues. | |
1867 | */ | |
f25f4e44 PWJ |
1868 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
1869 | { | |
fd2ea0a7 | 1870 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1871 | |
1872 | netif_tx_start_queue(txq); | |
f25f4e44 PWJ |
1873 | } |
1874 | ||
bea3348e SH |
1875 | /** |
1876 | * netif_stop_subqueue - stop sending packets on subqueue | |
1877 | * @dev: network device | |
1878 | * @queue_index: sub queue index | |
1879 | * | |
1880 | * Stop individual transmit queue of a device with multiple transmit queues. | |
1881 | */ | |
f25f4e44 PWJ |
1882 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
1883 | { | |
fd2ea0a7 | 1884 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1885 | #ifdef CONFIG_NETPOLL_TRAP |
1886 | if (netpoll_trap()) | |
1887 | return; | |
1888 | #endif | |
7b3d3e4f | 1889 | netif_tx_stop_queue(txq); |
f25f4e44 PWJ |
1890 | } |
1891 | ||
bea3348e SH |
1892 | /** |
1893 | * netif_subqueue_stopped - test status of subqueue | |
1894 | * @dev: network device | |
1895 | * @queue_index: sub queue index | |
1896 | * | |
1897 | * Check individual transmit queue of a device with multiple transmit queues. | |
1898 | */ | |
668f895a | 1899 | static inline int __netif_subqueue_stopped(const struct net_device *dev, |
f25f4e44 PWJ |
1900 | u16 queue_index) |
1901 | { | |
fd2ea0a7 | 1902 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
7b3d3e4f KK |
1903 | |
1904 | return netif_tx_queue_stopped(txq); | |
f25f4e44 PWJ |
1905 | } |
1906 | ||
668f895a PE |
1907 | static inline int netif_subqueue_stopped(const struct net_device *dev, |
1908 | struct sk_buff *skb) | |
1909 | { | |
1910 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); | |
1911 | } | |
bea3348e SH |
1912 | |
1913 | /** | |
1914 | * netif_wake_subqueue - allow sending packets on subqueue | |
1915 | * @dev: network device | |
1916 | * @queue_index: sub queue index | |
1917 | * | |
1918 | * Resume individual transmit queue of a device with multiple transmit queues. | |
1919 | */ | |
f25f4e44 PWJ |
1920 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
1921 | { | |
fd2ea0a7 | 1922 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
f25f4e44 PWJ |
1923 | #ifdef CONFIG_NETPOLL_TRAP |
1924 | if (netpoll_trap()) | |
1925 | return; | |
1926 | #endif | |
fd2ea0a7 | 1927 | if (test_and_clear_bit(__QUEUE_STATE_XOFF, &txq->state)) |
37437bb2 | 1928 | __netif_schedule(txq->qdisc); |
f25f4e44 PWJ |
1929 | } |
1930 | ||
a3d22a68 VZ |
1931 | /* |
1932 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used | |
1933 | * as a distribution range limit for the returned value. | |
1934 | */ | |
1935 | static inline u16 skb_tx_hash(const struct net_device *dev, | |
1936 | const struct sk_buff *skb) | |
1937 | { | |
1938 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); | |
1939 | } | |
1940 | ||
bea3348e SH |
1941 | /** |
1942 | * netif_is_multiqueue - test if device has multiple transmit queues | |
1943 | * @dev: network device | |
1944 | * | |
1945 | * Check if device has multiple transmit queues | |
bea3348e | 1946 | */ |
f25f4e44 PWJ |
1947 | static inline int netif_is_multiqueue(const struct net_device *dev) |
1948 | { | |
a02cec21 | 1949 | return dev->num_tx_queues > 1; |
f25f4e44 | 1950 | } |
1da177e4 | 1951 | |
e6484930 TH |
1952 | extern int netif_set_real_num_tx_queues(struct net_device *dev, |
1953 | unsigned int txq); | |
f0796d5c | 1954 | |
62fe0b40 BH |
1955 | #ifdef CONFIG_RPS |
1956 | extern int netif_set_real_num_rx_queues(struct net_device *dev, | |
1957 | unsigned int rxq); | |
1958 | #else | |
1959 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, | |
1960 | unsigned int rxq) | |
1961 | { | |
1962 | return 0; | |
1963 | } | |
1964 | #endif | |
1965 | ||
3171d026 BH |
1966 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
1967 | const struct net_device *from_dev) | |
1968 | { | |
1969 | netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues); | |
1970 | #ifdef CONFIG_RPS | |
1971 | return netif_set_real_num_rx_queues(to_dev, | |
1972 | from_dev->real_num_rx_queues); | |
1973 | #else | |
1974 | return 0; | |
1975 | #endif | |
1976 | } | |
1977 | ||
1da177e4 | 1978 | /* Use this variant when it is known for sure that it |
0ef47309 ML |
1979 | * is executing from hardware interrupt context or with hardware interrupts |
1980 | * disabled. | |
1da177e4 | 1981 | */ |
bea3348e | 1982 | extern void dev_kfree_skb_irq(struct sk_buff *skb); |
1da177e4 LT |
1983 | |
1984 | /* Use this variant in places where it could be invoked | |
0ef47309 ML |
1985 | * from either hardware interrupt or other context, with hardware interrupts |
1986 | * either disabled or enabled. | |
1da177e4 | 1987 | */ |
56079431 | 1988 | extern void dev_kfree_skb_any(struct sk_buff *skb); |
1da177e4 | 1989 | |
1da177e4 LT |
1990 | extern int netif_rx(struct sk_buff *skb); |
1991 | extern int netif_rx_ni(struct sk_buff *skb); | |
1da177e4 | 1992 | extern int netif_receive_skb(struct sk_buff *skb); |
5b252f0c | 1993 | extern gro_result_t dev_gro_receive(struct napi_struct *napi, |
96e93eab | 1994 | struct sk_buff *skb); |
c7c4b3b6 BH |
1995 | extern gro_result_t napi_skb_finish(gro_result_t ret, struct sk_buff *skb); |
1996 | extern gro_result_t napi_gro_receive(struct napi_struct *napi, | |
d565b0a1 | 1997 | struct sk_buff *skb); |
86cac58b | 1998 | extern void napi_gro_flush(struct napi_struct *napi); |
76620aaf | 1999 | extern struct sk_buff * napi_get_frags(struct napi_struct *napi); |
c7c4b3b6 | 2000 | extern gro_result_t napi_frags_finish(struct napi_struct *napi, |
5b252f0c BH |
2001 | struct sk_buff *skb, |
2002 | gro_result_t ret); | |
76620aaf | 2003 | extern struct sk_buff * napi_frags_skb(struct napi_struct *napi); |
c7c4b3b6 | 2004 | extern gro_result_t napi_gro_frags(struct napi_struct *napi); |
76620aaf HX |
2005 | |
2006 | static inline void napi_free_frags(struct napi_struct *napi) | |
2007 | { | |
2008 | kfree_skb(napi->skb); | |
2009 | napi->skb = NULL; | |
2010 | } | |
2011 | ||
ab95bfe0 | 2012 | extern int netdev_rx_handler_register(struct net_device *dev, |
93e2c32b JP |
2013 | rx_handler_func_t *rx_handler, |
2014 | void *rx_handler_data); | |
ab95bfe0 JP |
2015 | extern void netdev_rx_handler_unregister(struct net_device *dev); |
2016 | ||
c2373ee9 | 2017 | extern int dev_valid_name(const char *name); |
881d966b EB |
2018 | extern int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
2019 | extern int dev_ethtool(struct net *net, struct ifreq *); | |
1da177e4 | 2020 | extern unsigned dev_get_flags(const struct net_device *); |
bd380811 | 2021 | extern int __dev_change_flags(struct net_device *, unsigned int flags); |
1da177e4 | 2022 | extern int dev_change_flags(struct net_device *, unsigned); |
bd380811 | 2023 | extern void __dev_notify_flags(struct net_device *, unsigned int old_flags); |
cf04a4c7 | 2024 | extern int dev_change_name(struct net_device *, const char *); |
0b815a1a | 2025 | extern int dev_set_alias(struct net_device *, const char *, size_t); |
ce286d32 EB |
2026 | extern int dev_change_net_namespace(struct net_device *, |
2027 | struct net *, const char *); | |
1da177e4 | 2028 | extern int dev_set_mtu(struct net_device *, int); |
cbda10fa | 2029 | extern void dev_set_group(struct net_device *, int); |
1da177e4 LT |
2030 | extern int dev_set_mac_address(struct net_device *, |
2031 | struct sockaddr *); | |
f6a78bfc | 2032 | extern int dev_hard_start_xmit(struct sk_buff *skb, |
fd2ea0a7 DM |
2033 | struct net_device *dev, |
2034 | struct netdev_queue *txq); | |
44540960 AB |
2035 | extern int dev_forward_skb(struct net_device *dev, |
2036 | struct sk_buff *skb); | |
1da177e4 | 2037 | |
20380731 | 2038 | extern int netdev_budget; |
1da177e4 LT |
2039 | |
2040 | /* Called by rtnetlink.c:rtnl_unlock() */ | |
2041 | extern void netdev_run_todo(void); | |
2042 | ||
bea3348e SH |
2043 | /** |
2044 | * dev_put - release reference to device | |
2045 | * @dev: network device | |
2046 | * | |
9ef4429b | 2047 | * Release reference to device to allow it to be freed. |
bea3348e | 2048 | */ |
1da177e4 LT |
2049 | static inline void dev_put(struct net_device *dev) |
2050 | { | |
29b4433d | 2051 | irqsafe_cpu_dec(*dev->pcpu_refcnt); |
1da177e4 LT |
2052 | } |
2053 | ||
bea3348e SH |
2054 | /** |
2055 | * dev_hold - get reference to device | |
2056 | * @dev: network device | |
2057 | * | |
9ef4429b | 2058 | * Hold reference to device to keep it from being freed. |
bea3348e | 2059 | */ |
15333061 SH |
2060 | static inline void dev_hold(struct net_device *dev) |
2061 | { | |
29b4433d | 2062 | irqsafe_cpu_inc(*dev->pcpu_refcnt); |
15333061 | 2063 | } |
1da177e4 LT |
2064 | |
2065 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on | |
2066 | * and _off may be called from IRQ context, but it is caller | |
2067 | * who is responsible for serialization of these calls. | |
b00055aa SR |
2068 | * |
2069 | * The name carrier is inappropriate, these functions should really be | |
2070 | * called netif_lowerlayer_*() because they represent the state of any | |
2071 | * kind of lower layer not just hardware media. | |
1da177e4 LT |
2072 | */ |
2073 | ||
2074 | extern void linkwatch_fire_event(struct net_device *dev); | |
e014debe | 2075 | extern void linkwatch_forget_dev(struct net_device *dev); |
1da177e4 | 2076 | |
bea3348e SH |
2077 | /** |
2078 | * netif_carrier_ok - test if carrier present | |
2079 | * @dev: network device | |
2080 | * | |
2081 | * Check if carrier is present on device | |
2082 | */ | |
1da177e4 LT |
2083 | static inline int netif_carrier_ok(const struct net_device *dev) |
2084 | { | |
2085 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); | |
2086 | } | |
2087 | ||
9d21493b ED |
2088 | extern unsigned long dev_trans_start(struct net_device *dev); |
2089 | ||
1da177e4 LT |
2090 | extern void __netdev_watchdog_up(struct net_device *dev); |
2091 | ||
0a242efc | 2092 | extern void netif_carrier_on(struct net_device *dev); |
1da177e4 | 2093 | |
0a242efc | 2094 | extern void netif_carrier_off(struct net_device *dev); |
1da177e4 | 2095 | |
06c4648d IC |
2096 | extern void netif_notify_peers(struct net_device *dev); |
2097 | ||
bea3348e SH |
2098 | /** |
2099 | * netif_dormant_on - mark device as dormant. | |
2100 | * @dev: network device | |
2101 | * | |
2102 | * Mark device as dormant (as per RFC2863). | |
2103 | * | |
2104 | * The dormant state indicates that the relevant interface is not | |
2105 | * actually in a condition to pass packets (i.e., it is not 'up') but is | |
2106 | * in a "pending" state, waiting for some external event. For "on- | |
2107 | * demand" interfaces, this new state identifies the situation where the | |
2108 | * interface is waiting for events to place it in the up state. | |
2109 | * | |
2110 | */ | |
b00055aa SR |
2111 | static inline void netif_dormant_on(struct net_device *dev) |
2112 | { | |
2113 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2114 | linkwatch_fire_event(dev); | |
2115 | } | |
2116 | ||
bea3348e SH |
2117 | /** |
2118 | * netif_dormant_off - set device as not dormant. | |
2119 | * @dev: network device | |
2120 | * | |
2121 | * Device is not in dormant state. | |
2122 | */ | |
b00055aa SR |
2123 | static inline void netif_dormant_off(struct net_device *dev) |
2124 | { | |
2125 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) | |
2126 | linkwatch_fire_event(dev); | |
2127 | } | |
2128 | ||
bea3348e SH |
2129 | /** |
2130 | * netif_dormant - test if carrier present | |
2131 | * @dev: network device | |
2132 | * | |
2133 | * Check if carrier is present on device | |
2134 | */ | |
b00055aa SR |
2135 | static inline int netif_dormant(const struct net_device *dev) |
2136 | { | |
2137 | return test_bit(__LINK_STATE_DORMANT, &dev->state); | |
2138 | } | |
2139 | ||
2140 | ||
bea3348e SH |
2141 | /** |
2142 | * netif_oper_up - test if device is operational | |
2143 | * @dev: network device | |
2144 | * | |
2145 | * Check if carrier is operational | |
2146 | */ | |
d94d9fee ED |
2147 | static inline int netif_oper_up(const struct net_device *dev) |
2148 | { | |
b00055aa SR |
2149 | return (dev->operstate == IF_OPER_UP || |
2150 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); | |
2151 | } | |
2152 | ||
bea3348e SH |
2153 | /** |
2154 | * netif_device_present - is device available or removed | |
2155 | * @dev: network device | |
2156 | * | |
2157 | * Check if device has not been removed from system. | |
2158 | */ | |
1da177e4 LT |
2159 | static inline int netif_device_present(struct net_device *dev) |
2160 | { | |
2161 | return test_bit(__LINK_STATE_PRESENT, &dev->state); | |
2162 | } | |
2163 | ||
56079431 | 2164 | extern void netif_device_detach(struct net_device *dev); |
1da177e4 | 2165 | |
56079431 | 2166 | extern void netif_device_attach(struct net_device *dev); |
1da177e4 LT |
2167 | |
2168 | /* | |
2169 | * Network interface message level settings | |
2170 | */ | |
1da177e4 LT |
2171 | |
2172 | enum { | |
2173 | NETIF_MSG_DRV = 0x0001, | |
2174 | NETIF_MSG_PROBE = 0x0002, | |
2175 | NETIF_MSG_LINK = 0x0004, | |
2176 | NETIF_MSG_TIMER = 0x0008, | |
2177 | NETIF_MSG_IFDOWN = 0x0010, | |
2178 | NETIF_MSG_IFUP = 0x0020, | |
2179 | NETIF_MSG_RX_ERR = 0x0040, | |
2180 | NETIF_MSG_TX_ERR = 0x0080, | |
2181 | NETIF_MSG_TX_QUEUED = 0x0100, | |
2182 | NETIF_MSG_INTR = 0x0200, | |
2183 | NETIF_MSG_TX_DONE = 0x0400, | |
2184 | NETIF_MSG_RX_STATUS = 0x0800, | |
2185 | NETIF_MSG_PKTDATA = 0x1000, | |
2186 | NETIF_MSG_HW = 0x2000, | |
2187 | NETIF_MSG_WOL = 0x4000, | |
2188 | }; | |
2189 | ||
2190 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) | |
2191 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) | |
2192 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) | |
2193 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) | |
2194 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) | |
2195 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) | |
2196 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) | |
2197 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) | |
2198 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) | |
2199 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) | |
2200 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) | |
2201 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) | |
2202 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) | |
2203 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) | |
2204 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) | |
2205 | ||
2206 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) | |
2207 | { | |
2208 | /* use default */ | |
2209 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) | |
2210 | return default_msg_enable_bits; | |
2211 | if (debug_value == 0) /* no output */ | |
2212 | return 0; | |
2213 | /* set low N bits */ | |
2214 | return (1 << debug_value) - 1; | |
2215 | } | |
2216 | ||
c773e847 | 2217 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
932ff279 | 2218 | { |
c773e847 DM |
2219 | spin_lock(&txq->_xmit_lock); |
2220 | txq->xmit_lock_owner = cpu; | |
22dd7495 JHS |
2221 | } |
2222 | ||
fd2ea0a7 DM |
2223 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2224 | { | |
2225 | spin_lock_bh(&txq->_xmit_lock); | |
2226 | txq->xmit_lock_owner = smp_processor_id(); | |
2227 | } | |
2228 | ||
c3f26a26 DM |
2229 | static inline int __netif_tx_trylock(struct netdev_queue *txq) |
2230 | { | |
2231 | int ok = spin_trylock(&txq->_xmit_lock); | |
2232 | if (likely(ok)) | |
2233 | txq->xmit_lock_owner = smp_processor_id(); | |
2234 | return ok; | |
2235 | } | |
2236 | ||
2237 | static inline void __netif_tx_unlock(struct netdev_queue *txq) | |
2238 | { | |
2239 | txq->xmit_lock_owner = -1; | |
2240 | spin_unlock(&txq->_xmit_lock); | |
2241 | } | |
2242 | ||
2243 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) | |
2244 | { | |
2245 | txq->xmit_lock_owner = -1; | |
2246 | spin_unlock_bh(&txq->_xmit_lock); | |
2247 | } | |
2248 | ||
08baf561 ED |
2249 | static inline void txq_trans_update(struct netdev_queue *txq) |
2250 | { | |
2251 | if (txq->xmit_lock_owner != -1) | |
2252 | txq->trans_start = jiffies; | |
2253 | } | |
2254 | ||
d29f749e DJ |
2255 | /** |
2256 | * netif_tx_lock - grab network device transmit lock | |
2257 | * @dev: network device | |
d29f749e DJ |
2258 | * |
2259 | * Get network device transmit lock | |
2260 | */ | |
22dd7495 JHS |
2261 | static inline void netif_tx_lock(struct net_device *dev) |
2262 | { | |
e8a0464c | 2263 | unsigned int i; |
c3f26a26 | 2264 | int cpu; |
c773e847 | 2265 | |
c3f26a26 DM |
2266 | spin_lock(&dev->tx_global_lock); |
2267 | cpu = smp_processor_id(); | |
e8a0464c DM |
2268 | for (i = 0; i < dev->num_tx_queues; i++) { |
2269 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2270 | |
2271 | /* We are the only thread of execution doing a | |
2272 | * freeze, but we have to grab the _xmit_lock in | |
2273 | * order to synchronize with threads which are in | |
2274 | * the ->hard_start_xmit() handler and already | |
2275 | * checked the frozen bit. | |
2276 | */ | |
e8a0464c | 2277 | __netif_tx_lock(txq, cpu); |
c3f26a26 DM |
2278 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2279 | __netif_tx_unlock(txq); | |
e8a0464c | 2280 | } |
932ff279 HX |
2281 | } |
2282 | ||
2283 | static inline void netif_tx_lock_bh(struct net_device *dev) | |
2284 | { | |
e8a0464c DM |
2285 | local_bh_disable(); |
2286 | netif_tx_lock(dev); | |
932ff279 HX |
2287 | } |
2288 | ||
932ff279 HX |
2289 | static inline void netif_tx_unlock(struct net_device *dev) |
2290 | { | |
e8a0464c DM |
2291 | unsigned int i; |
2292 | ||
2293 | for (i = 0; i < dev->num_tx_queues; i++) { | |
2294 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c773e847 | 2295 | |
c3f26a26 DM |
2296 | /* No need to grab the _xmit_lock here. If the |
2297 | * queue is not stopped for another reason, we | |
2298 | * force a schedule. | |
2299 | */ | |
2300 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); | |
7b3d3e4f | 2301 | netif_schedule_queue(txq); |
c3f26a26 DM |
2302 | } |
2303 | spin_unlock(&dev->tx_global_lock); | |
932ff279 HX |
2304 | } |
2305 | ||
2306 | static inline void netif_tx_unlock_bh(struct net_device *dev) | |
2307 | { | |
e8a0464c DM |
2308 | netif_tx_unlock(dev); |
2309 | local_bh_enable(); | |
932ff279 HX |
2310 | } |
2311 | ||
c773e847 | 2312 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
22dd7495 | 2313 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2314 | __netif_tx_lock(txq, cpu); \ |
22dd7495 JHS |
2315 | } \ |
2316 | } | |
2317 | ||
c773e847 | 2318 | #define HARD_TX_UNLOCK(dev, txq) { \ |
22dd7495 | 2319 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
c773e847 | 2320 | __netif_tx_unlock(txq); \ |
22dd7495 JHS |
2321 | } \ |
2322 | } | |
2323 | ||
1da177e4 LT |
2324 | static inline void netif_tx_disable(struct net_device *dev) |
2325 | { | |
fd2ea0a7 | 2326 | unsigned int i; |
c3f26a26 | 2327 | int cpu; |
fd2ea0a7 | 2328 | |
c3f26a26 DM |
2329 | local_bh_disable(); |
2330 | cpu = smp_processor_id(); | |
fd2ea0a7 DM |
2331 | for (i = 0; i < dev->num_tx_queues; i++) { |
2332 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); | |
c3f26a26 DM |
2333 | |
2334 | __netif_tx_lock(txq, cpu); | |
fd2ea0a7 | 2335 | netif_tx_stop_queue(txq); |
c3f26a26 | 2336 | __netif_tx_unlock(txq); |
fd2ea0a7 | 2337 | } |
c3f26a26 | 2338 | local_bh_enable(); |
1da177e4 LT |
2339 | } |
2340 | ||
e308a5d8 DM |
2341 | static inline void netif_addr_lock(struct net_device *dev) |
2342 | { | |
2343 | spin_lock(&dev->addr_list_lock); | |
2344 | } | |
2345 | ||
2346 | static inline void netif_addr_lock_bh(struct net_device *dev) | |
2347 | { | |
2348 | spin_lock_bh(&dev->addr_list_lock); | |
2349 | } | |
2350 | ||
2351 | static inline void netif_addr_unlock(struct net_device *dev) | |
2352 | { | |
2353 | spin_unlock(&dev->addr_list_lock); | |
2354 | } | |
2355 | ||
2356 | static inline void netif_addr_unlock_bh(struct net_device *dev) | |
2357 | { | |
2358 | spin_unlock_bh(&dev->addr_list_lock); | |
2359 | } | |
2360 | ||
f001fde5 | 2361 | /* |
31278e71 | 2362 | * dev_addrs walker. Should be used only for read access. Call with |
f001fde5 JP |
2363 | * rcu_read_lock held. |
2364 | */ | |
2365 | #define for_each_dev_addr(dev, ha) \ | |
31278e71 | 2366 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
f001fde5 | 2367 | |
1da177e4 LT |
2368 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2369 | ||
2370 | extern void ether_setup(struct net_device *dev); | |
2371 | ||
2372 | /* Support for loadable net-drivers */ | |
36909ea4 | 2373 | extern struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
f25f4e44 | 2374 | void (*setup)(struct net_device *), |
36909ea4 | 2375 | unsigned int txqs, unsigned int rxqs); |
f25f4e44 | 2376 | #define alloc_netdev(sizeof_priv, name, setup) \ |
36909ea4 TH |
2377 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2378 | ||
2379 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ | |
2380 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) | |
2381 | ||
1da177e4 LT |
2382 | extern int register_netdev(struct net_device *dev); |
2383 | extern void unregister_netdev(struct net_device *dev); | |
f001fde5 | 2384 | |
22bedad3 JP |
2385 | /* General hardware address lists handling functions */ |
2386 | extern int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, | |
2387 | struct netdev_hw_addr_list *from_list, | |
2388 | int addr_len, unsigned char addr_type); | |
2389 | extern void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, | |
2390 | struct netdev_hw_addr_list *from_list, | |
2391 | int addr_len, unsigned char addr_type); | |
2392 | extern int __hw_addr_sync(struct netdev_hw_addr_list *to_list, | |
2393 | struct netdev_hw_addr_list *from_list, | |
2394 | int addr_len); | |
2395 | extern void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, | |
2396 | struct netdev_hw_addr_list *from_list, | |
2397 | int addr_len); | |
2398 | extern void __hw_addr_flush(struct netdev_hw_addr_list *list); | |
2399 | extern void __hw_addr_init(struct netdev_hw_addr_list *list); | |
2400 | ||
f001fde5 JP |
2401 | /* Functions used for device addresses handling */ |
2402 | extern int dev_addr_add(struct net_device *dev, unsigned char *addr, | |
2403 | unsigned char addr_type); | |
2404 | extern int dev_addr_del(struct net_device *dev, unsigned char *addr, | |
2405 | unsigned char addr_type); | |
2406 | extern int dev_addr_add_multiple(struct net_device *to_dev, | |
2407 | struct net_device *from_dev, | |
2408 | unsigned char addr_type); | |
2409 | extern int dev_addr_del_multiple(struct net_device *to_dev, | |
2410 | struct net_device *from_dev, | |
2411 | unsigned char addr_type); | |
a748ee24 JP |
2412 | extern void dev_addr_flush(struct net_device *dev); |
2413 | extern int dev_addr_init(struct net_device *dev); | |
2414 | ||
2415 | /* Functions used for unicast addresses handling */ | |
2416 | extern int dev_uc_add(struct net_device *dev, unsigned char *addr); | |
2417 | extern int dev_uc_del(struct net_device *dev, unsigned char *addr); | |
2418 | extern int dev_uc_sync(struct net_device *to, struct net_device *from); | |
2419 | extern void dev_uc_unsync(struct net_device *to, struct net_device *from); | |
2420 | extern void dev_uc_flush(struct net_device *dev); | |
2421 | extern void dev_uc_init(struct net_device *dev); | |
f001fde5 | 2422 | |
22bedad3 JP |
2423 | /* Functions used for multicast addresses handling */ |
2424 | extern int dev_mc_add(struct net_device *dev, unsigned char *addr); | |
2425 | extern int dev_mc_add_global(struct net_device *dev, unsigned char *addr); | |
2426 | extern int dev_mc_del(struct net_device *dev, unsigned char *addr); | |
2427 | extern int dev_mc_del_global(struct net_device *dev, unsigned char *addr); | |
2428 | extern int dev_mc_sync(struct net_device *to, struct net_device *from); | |
2429 | extern void dev_mc_unsync(struct net_device *to, struct net_device *from); | |
2430 | extern void dev_mc_flush(struct net_device *dev); | |
2431 | extern void dev_mc_init(struct net_device *dev); | |
f001fde5 | 2432 | |
4417da66 PM |
2433 | /* Functions used for secondary unicast and multicast support */ |
2434 | extern void dev_set_rx_mode(struct net_device *dev); | |
2435 | extern void __dev_set_rx_mode(struct net_device *dev); | |
dad9b335 WC |
2436 | extern int dev_set_promiscuity(struct net_device *dev, int inc); |
2437 | extern int dev_set_allmulti(struct net_device *dev, int inc); | |
1da177e4 | 2438 | extern void netdev_state_change(struct net_device *dev); |
3ca5b404 | 2439 | extern int netdev_bonding_change(struct net_device *dev, |
75c78500 | 2440 | unsigned long event); |
d8a33ac4 | 2441 | extern void netdev_features_change(struct net_device *dev); |
1da177e4 | 2442 | /* Load a device via the kmod */ |
881d966b | 2443 | extern void dev_load(struct net *net, const char *name); |
1da177e4 | 2444 | extern void dev_mcast_init(void); |
d7753516 BH |
2445 | extern struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
2446 | struct rtnl_link_stats64 *storage); | |
eeda3fd6 | 2447 | |
1da177e4 | 2448 | extern int netdev_max_backlog; |
3b098e2d | 2449 | extern int netdev_tstamp_prequeue; |
1da177e4 | 2450 | extern int weight_p; |
0a14842f | 2451 | extern int bpf_jit_enable; |
1da177e4 | 2452 | extern int netdev_set_master(struct net_device *dev, struct net_device *master); |
1765a575 JP |
2453 | extern int netdev_set_bond_master(struct net_device *dev, |
2454 | struct net_device *master); | |
84fa7933 | 2455 | extern int skb_checksum_help(struct sk_buff *skb); |
c8f44aff MM |
2456 | extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, |
2457 | netdev_features_t features); | |
fb286bb2 HX |
2458 | #ifdef CONFIG_BUG |
2459 | extern void netdev_rx_csum_fault(struct net_device *dev); | |
2460 | #else | |
2461 | static inline void netdev_rx_csum_fault(struct net_device *dev) | |
2462 | { | |
2463 | } | |
2464 | #endif | |
1da177e4 LT |
2465 | /* rx skb timestamps */ |
2466 | extern void net_enable_timestamp(void); | |
2467 | extern void net_disable_timestamp(void); | |
2468 | ||
20380731 ACM |
2469 | #ifdef CONFIG_PROC_FS |
2470 | extern void *dev_seq_start(struct seq_file *seq, loff_t *pos); | |
2471 | extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); | |
2472 | extern void dev_seq_stop(struct seq_file *seq, void *v); | |
2473 | #endif | |
2474 | ||
b8a9787e JV |
2475 | extern int netdev_class_create_file(struct class_attribute *class_attr); |
2476 | extern void netdev_class_remove_file(struct class_attribute *class_attr); | |
2477 | ||
04600794 JB |
2478 | extern struct kobj_ns_type_operations net_ns_type_operations; |
2479 | ||
3019de12 | 2480 | extern const char *netdev_drivername(const struct net_device *dev); |
6579e57b | 2481 | |
20380731 ACM |
2482 | extern void linkwatch_run_queue(void); |
2483 | ||
c8f44aff MM |
2484 | static inline netdev_features_t netdev_get_wanted_features( |
2485 | struct net_device *dev) | |
5455c699 MM |
2486 | { |
2487 | return (dev->features & ~dev->hw_features) | dev->wanted_features; | |
2488 | } | |
c8f44aff MM |
2489 | netdev_features_t netdev_increment_features(netdev_features_t all, |
2490 | netdev_features_t one, netdev_features_t mask); | |
6cb6a27c | 2491 | int __netdev_update_features(struct net_device *dev); |
5455c699 | 2492 | void netdev_update_features(struct net_device *dev); |
afe12cc8 | 2493 | void netdev_change_features(struct net_device *dev); |
7f353bf2 | 2494 | |
fc4a7489 PM |
2495 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2496 | struct net_device *dev); | |
2497 | ||
c8f44aff | 2498 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
58e998c6 | 2499 | |
c8f44aff | 2500 | static inline int net_gso_ok(netdev_features_t features, int gso_type) |
576a30eb | 2501 | { |
c8f44aff | 2502 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
0345e186 MM |
2503 | |
2504 | /* check flags correspondence */ | |
2505 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); | |
2506 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); | |
2507 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); | |
2508 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); | |
2509 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); | |
2510 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); | |
2511 | ||
d6b4991a | 2512 | return (features & feature) == feature; |
576a30eb HX |
2513 | } |
2514 | ||
c8f44aff | 2515 | static inline int skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
bcd76111 | 2516 | { |
278b2513 | 2517 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
21dc3301 | 2518 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
bcd76111 HX |
2519 | } |
2520 | ||
c8f44aff MM |
2521 | static inline int netif_needs_gso(struct sk_buff *skb, |
2522 | netdev_features_t features) | |
7967168c | 2523 | { |
fc741216 JG |
2524 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
2525 | unlikely(skb->ip_summed != CHECKSUM_PARTIAL)); | |
7967168c HX |
2526 | } |
2527 | ||
82cc1a7a PWJ |
2528 | static inline void netif_set_gso_max_size(struct net_device *dev, |
2529 | unsigned int size) | |
2530 | { | |
2531 | dev->gso_max_size = size; | |
2532 | } | |
2533 | ||
1765a575 JP |
2534 | static inline int netif_is_bond_slave(struct net_device *dev) |
2535 | { | |
2536 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; | |
2537 | } | |
2538 | ||
505d4f73 | 2539 | extern struct pernet_operations __net_initdata loopback_net_ops; |
b1b67dd4 | 2540 | |
571ba423 JP |
2541 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
2542 | ||
2543 | /* netdev_printk helpers, similar to dev_printk */ | |
2544 | ||
2545 | static inline const char *netdev_name(const struct net_device *dev) | |
2546 | { | |
2547 | if (dev->reg_state != NETREG_REGISTERED) | |
2548 | return "(unregistered net_device)"; | |
2549 | return dev->name; | |
2550 | } | |
2551 | ||
ffa10cb4 JB |
2552 | extern int __netdev_printk(const char *level, const struct net_device *dev, |
2553 | struct va_format *vaf); | |
2554 | ||
b9075fa9 JP |
2555 | extern __printf(3, 4) |
2556 | int netdev_printk(const char *level, const struct net_device *dev, | |
2557 | const char *format, ...); | |
2558 | extern __printf(2, 3) | |
2559 | int netdev_emerg(const struct net_device *dev, const char *format, ...); | |
2560 | extern __printf(2, 3) | |
2561 | int netdev_alert(const struct net_device *dev, const char *format, ...); | |
2562 | extern __printf(2, 3) | |
2563 | int netdev_crit(const struct net_device *dev, const char *format, ...); | |
2564 | extern __printf(2, 3) | |
2565 | int netdev_err(const struct net_device *dev, const char *format, ...); | |
2566 | extern __printf(2, 3) | |
2567 | int netdev_warn(const struct net_device *dev, const char *format, ...); | |
2568 | extern __printf(2, 3) | |
2569 | int netdev_notice(const struct net_device *dev, const char *format, ...); | |
2570 | extern __printf(2, 3) | |
2571 | int netdev_info(const struct net_device *dev, const char *format, ...); | |
571ba423 | 2572 | |
8909c9ad VK |
2573 | #define MODULE_ALIAS_NETDEV(device) \ |
2574 | MODULE_ALIAS("netdev-" device) | |
2575 | ||
571ba423 JP |
2576 | #if defined(DEBUG) |
2577 | #define netdev_dbg(__dev, format, args...) \ | |
2578 | netdev_printk(KERN_DEBUG, __dev, format, ##args) | |
2579 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2580 | #define netdev_dbg(__dev, format, args...) \ | |
2581 | do { \ | |
ffa10cb4 | 2582 | dynamic_netdev_dbg(__dev, format, ##args); \ |
571ba423 JP |
2583 | } while (0) |
2584 | #else | |
2585 | #define netdev_dbg(__dev, format, args...) \ | |
2586 | ({ \ | |
2587 | if (0) \ | |
2588 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ | |
2589 | 0; \ | |
2590 | }) | |
2591 | #endif | |
2592 | ||
2593 | #if defined(VERBOSE_DEBUG) | |
2594 | #define netdev_vdbg netdev_dbg | |
2595 | #else | |
2596 | ||
2597 | #define netdev_vdbg(dev, format, args...) \ | |
2598 | ({ \ | |
2599 | if (0) \ | |
2600 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ | |
2601 | 0; \ | |
2602 | }) | |
2603 | #endif | |
2604 | ||
2605 | /* | |
2606 | * netdev_WARN() acts like dev_printk(), but with the key difference | |
2607 | * of using a WARN/WARN_ON to get the message out, including the | |
2608 | * file/line information and a backtrace. | |
2609 | */ | |
2610 | #define netdev_WARN(dev, format, args...) \ | |
2611 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args); | |
2612 | ||
b3d95c5c JP |
2613 | /* netif printk helpers, similar to netdev_printk */ |
2614 | ||
2615 | #define netif_printk(priv, type, level, dev, fmt, args...) \ | |
2616 | do { \ | |
2617 | if (netif_msg_##type(priv)) \ | |
2618 | netdev_printk(level, (dev), fmt, ##args); \ | |
2619 | } while (0) | |
2620 | ||
f45f4321 JP |
2621 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
2622 | do { \ | |
2623 | if (netif_msg_##type(priv)) \ | |
2624 | netdev_##level(dev, fmt, ##args); \ | |
2625 | } while (0) | |
2626 | ||
b3d95c5c | 2627 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
f45f4321 | 2628 | netif_level(emerg, priv, type, dev, fmt, ##args) |
b3d95c5c | 2629 | #define netif_alert(priv, type, dev, fmt, args...) \ |
f45f4321 | 2630 | netif_level(alert, priv, type, dev, fmt, ##args) |
b3d95c5c | 2631 | #define netif_crit(priv, type, dev, fmt, args...) \ |
f45f4321 | 2632 | netif_level(crit, priv, type, dev, fmt, ##args) |
b3d95c5c | 2633 | #define netif_err(priv, type, dev, fmt, args...) \ |
f45f4321 | 2634 | netif_level(err, priv, type, dev, fmt, ##args) |
b3d95c5c | 2635 | #define netif_warn(priv, type, dev, fmt, args...) \ |
f45f4321 | 2636 | netif_level(warn, priv, type, dev, fmt, ##args) |
b3d95c5c | 2637 | #define netif_notice(priv, type, dev, fmt, args...) \ |
f45f4321 | 2638 | netif_level(notice, priv, type, dev, fmt, ##args) |
b3d95c5c | 2639 | #define netif_info(priv, type, dev, fmt, args...) \ |
f45f4321 | 2640 | netif_level(info, priv, type, dev, fmt, ##args) |
b3d95c5c JP |
2641 | |
2642 | #if defined(DEBUG) | |
2643 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2644 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) | |
2645 | #elif defined(CONFIG_DYNAMIC_DEBUG) | |
2646 | #define netif_dbg(priv, type, netdev, format, args...) \ | |
2647 | do { \ | |
2648 | if (netif_msg_##type(priv)) \ | |
b5fb0a03 | 2649 | dynamic_netdev_dbg(netdev, format, ##args); \ |
b3d95c5c JP |
2650 | } while (0) |
2651 | #else | |
2652 | #define netif_dbg(priv, type, dev, format, args...) \ | |
2653 | ({ \ | |
2654 | if (0) \ | |
2655 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ | |
2656 | 0; \ | |
2657 | }) | |
2658 | #endif | |
2659 | ||
2660 | #if defined(VERBOSE_DEBUG) | |
bcfcc450 | 2661 | #define netif_vdbg netif_dbg |
b3d95c5c JP |
2662 | #else |
2663 | #define netif_vdbg(priv, type, dev, format, args...) \ | |
2664 | ({ \ | |
2665 | if (0) \ | |
a4ed89cb | 2666 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
b3d95c5c JP |
2667 | 0; \ |
2668 | }) | |
2669 | #endif | |
571ba423 | 2670 | |
1da177e4 LT |
2671 | #endif /* __KERNEL__ */ |
2672 | ||
385a154c | 2673 | #endif /* _LINUX_NETDEVICE_H */ |