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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 | * |
10 | * Authors: Ross Biro |
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> |
14 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
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/pm_qos.h> |
29 | #include <linux/timer.h> |
30 | #include <linux/bug.h> |
31 | #include <linux/delay.h> |
32 | #include <linux/atomic.h> |
33 | #include <asm/cache.h> |
34 | #include <asm/byteorder.h> |
35 | |
36 | #include <linux/percpu.h> |
37 | #include <linux/rculist.h> |
38 | #include <linux/dmaengine.h> |
39 | #include <linux/workqueue.h> |
40 | #include <linux/dynamic_queue_limits.h> |
41 | |
42 | #include <linux/ethtool.h> |
43 | #include <net/net_namespace.h> |
44 | #include <net/dsa.h> |
45 | #ifdef CONFIG_DCB |
46 | #include <net/dcbnl.h> |
47 | #endif |
48 | #include <net/netprio_cgroup.h> |
49 | |
50 | #include <linux/netdev_features.h> |
51 | #include <linux/neighbour.h> |
52 | #include <uapi/linux/netdevice.h> |
53 | |
54 | struct netpoll_info; |
55 | struct device; |
56 | struct phy_device; |
57 | /* 802.11 specific */ |
58 | struct wireless_dev; |
59 | /* source back-compat hooks */ |
60 | #define SET_ETHTOOL_OPS(netdev,ops) \ |
61 | ( (netdev)->ethtool_ops = (ops) ) |
62 | |
63 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
64 | const struct ethtool_ops *ops); |
65 | |
66 | /* hardware address assignment types */ |
67 | #define NET_ADDR_PERM 0 /* address is permanent (default) */ |
68 | #define NET_ADDR_RANDOM 1 /* address is generated randomly */ |
69 | #define NET_ADDR_STOLEN 2 /* address is stolen from other device */ |
70 | #define NET_ADDR_SET 3 /* address is set using |
71 | * dev_set_mac_address() */ |
72 | |
73 | /* Backlog congestion levels */ |
74 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
75 | #define NET_RX_DROP 1 /* packet dropped */ |
76 | |
77 | /* |
78 | * Transmit return codes: transmit return codes originate from three different |
79 | * namespaces: |
80 | * |
81 | * - qdisc return codes |
82 | * - driver transmit return codes |
83 | * - errno values |
84 | * |
85 | * Drivers are allowed to return any one of those in their hard_start_xmit() |
86 | * function. Real network devices commonly used with qdiscs should only return |
87 | * the driver transmit return codes though - when qdiscs are used, the actual |
88 | * transmission happens asynchronously, so the value is not propagated to |
89 | * higher layers. Virtual network devices transmit synchronously, in this case |
90 | * the driver transmit return codes are consumed by dev_queue_xmit(), all |
91 | * others are propagated to higher layers. |
92 | */ |
93 | |
94 | /* qdisc ->enqueue() return codes. */ |
95 | #define NET_XMIT_SUCCESS 0x00 |
96 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
97 | #define NET_XMIT_CN 0x02 /* congestion notification */ |
98 | #define NET_XMIT_POLICED 0x03 /* skb is shot by police */ |
99 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
100 | |
101 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
102 | * indicates that the device will soon be dropping packets, or already drops |
103 | * some packets of the same priority; prompting us to send less aggressively. */ |
104 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
105 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
106 | |
107 | /* Driver transmit return codes */ |
108 | #define NETDEV_TX_MASK 0xf0 |
109 | |
110 | enum netdev_tx { |
111 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
112 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
113 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
114 | NETDEV_TX_LOCKED = 0x20, /* driver tx lock was already taken */ |
115 | }; |
116 | typedef enum netdev_tx netdev_tx_t; |
117 | |
118 | /* |
119 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
120 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
121 | */ |
122 | static inline bool dev_xmit_complete(int rc) |
123 | { |
124 | /* |
125 | * Positive cases with an skb consumed by a driver: |
126 | * - successful transmission (rc == NETDEV_TX_OK) |
127 | * - error while transmitting (rc < 0) |
128 | * - error while queueing to a different device (rc & NET_XMIT_MASK) |
129 | */ |
130 | if (likely(rc < NET_XMIT_MASK)) |
131 | return true; |
132 | |
133 | return false; |
134 | } |
135 | |
136 | /* |
137 | * Compute the worst case header length according to the protocols |
138 | * used. |
139 | */ |
140 | |
141 | #if defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
142 | # if defined(CONFIG_MAC80211_MESH) |
143 | # define LL_MAX_HEADER 128 |
144 | # else |
145 | # define LL_MAX_HEADER 96 |
146 | # endif |
147 | #else |
148 | # define LL_MAX_HEADER 32 |
149 | #endif |
150 | |
151 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
152 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
153 | #define MAX_HEADER LL_MAX_HEADER |
154 | #else |
155 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
156 | #endif |
157 | |
158 | /* |
159 | * Old network device statistics. Fields are native words |
160 | * (unsigned long) so they can be read and written atomically. |
161 | */ |
162 | |
163 | struct net_device_stats { |
164 | unsigned long rx_packets; |
165 | unsigned long tx_packets; |
166 | unsigned long rx_bytes; |
167 | unsigned long tx_bytes; |
168 | unsigned long rx_errors; |
169 | unsigned long tx_errors; |
170 | unsigned long rx_dropped; |
171 | unsigned long tx_dropped; |
172 | unsigned long multicast; |
173 | unsigned long collisions; |
174 | unsigned long rx_length_errors; |
175 | unsigned long rx_over_errors; |
176 | unsigned long rx_crc_errors; |
177 | unsigned long rx_frame_errors; |
178 | unsigned long rx_fifo_errors; |
179 | unsigned long rx_missed_errors; |
180 | unsigned long tx_aborted_errors; |
181 | unsigned long tx_carrier_errors; |
182 | unsigned long tx_fifo_errors; |
183 | unsigned long tx_heartbeat_errors; |
184 | unsigned long tx_window_errors; |
185 | unsigned long rx_compressed; |
186 | unsigned long tx_compressed; |
187 | }; |
188 | |
189 | |
190 | #include <linux/cache.h> |
191 | #include <linux/skbuff.h> |
192 | |
193 | #ifdef CONFIG_RPS |
194 | #include <linux/static_key.h> |
195 | extern struct static_key rps_needed; |
196 | #endif |
197 | |
198 | struct neighbour; |
199 | struct neigh_parms; |
200 | struct sk_buff; |
201 | |
202 | struct netdev_hw_addr { |
203 | struct list_head list; |
204 | unsigned char addr[MAX_ADDR_LEN]; |
205 | unsigned char type; |
206 | #define NETDEV_HW_ADDR_T_LAN 1 |
207 | #define NETDEV_HW_ADDR_T_SAN 2 |
208 | #define NETDEV_HW_ADDR_T_SLAVE 3 |
209 | #define NETDEV_HW_ADDR_T_UNICAST 4 |
210 | #define NETDEV_HW_ADDR_T_MULTICAST 5 |
211 | bool global_use; |
212 | int sync_cnt; |
213 | int refcount; |
214 | int synced; |
215 | struct rcu_head rcu_head; |
216 | }; |
217 | |
218 | struct netdev_hw_addr_list { |
219 | struct list_head list; |
220 | int count; |
221 | }; |
222 | |
223 | #define netdev_hw_addr_list_count(l) ((l)->count) |
224 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) |
225 | #define netdev_hw_addr_list_for_each(ha, l) \ |
226 | list_for_each_entry(ha, &(l)->list, list) |
227 | |
228 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
229 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) |
230 | #define netdev_for_each_uc_addr(ha, dev) \ |
231 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) |
232 | |
233 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
234 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) |
235 | #define netdev_for_each_mc_addr(ha, dev) \ |
236 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
237 | |
238 | struct hh_cache { |
239 | u16 hh_len; |
240 | u16 __pad; |
241 | seqlock_t hh_lock; |
242 | |
243 | /* cached hardware header; allow for machine alignment needs. */ |
244 | #define HH_DATA_MOD 16 |
245 | #define HH_DATA_OFF(__len) \ |
246 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
247 | #define HH_DATA_ALIGN(__len) \ |
248 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
249 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
250 | }; |
251 | |
252 | /* Reserve HH_DATA_MOD byte aligned hard_header_len, but at least that much. |
253 | * Alternative is: |
254 | * dev->hard_header_len ? (dev->hard_header_len + |
255 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
256 | * |
257 | * We could use other alignment values, but we must maintain the |
258 | * relationship HH alignment <= LL alignment. |
259 | */ |
260 | #define LL_RESERVED_SPACE(dev) \ |
261 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
262 | #define LL_RESERVED_SPACE_EXTRA(dev,extra) \ |
263 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
264 | |
265 | struct header_ops { |
266 | int (*create) (struct sk_buff *skb, struct net_device *dev, |
267 | unsigned short type, const void *daddr, |
268 | const void *saddr, unsigned int len); |
269 | int (*parse)(const struct sk_buff *skb, unsigned char *haddr); |
270 | int (*rebuild)(struct sk_buff *skb); |
271 | int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
272 | void (*cache_update)(struct hh_cache *hh, |
273 | const struct net_device *dev, |
274 | const unsigned char *haddr); |
275 | }; |
276 | |
277 | /* These flag bits are private to the generic network queueing |
278 | * layer, they may not be explicitly referenced by any other |
279 | * code. |
280 | */ |
281 | |
282 | enum netdev_state_t { |
283 | __LINK_STATE_START, |
284 | __LINK_STATE_PRESENT, |
285 | __LINK_STATE_NOCARRIER, |
286 | __LINK_STATE_LINKWATCH_PENDING, |
287 | __LINK_STATE_DORMANT, |
288 | }; |
289 | |
290 | |
291 | /* |
292 | * This structure holds at boot time configured netdevice settings. They |
293 | * are then used in the device probing. |
294 | */ |
295 | struct netdev_boot_setup { |
296 | char name[IFNAMSIZ]; |
297 | struct ifmap map; |
298 | }; |
299 | #define NETDEV_BOOT_SETUP_MAX 8 |
300 | |
301 | int __init netdev_boot_setup(char *str); |
302 | |
303 | /* |
304 | * Structure for NAPI scheduling similar to tasklet but with weighting |
305 | */ |
306 | struct napi_struct { |
307 | /* The poll_list must only be managed by the entity which |
308 | * changes the state of the NAPI_STATE_SCHED bit. This means |
309 | * whoever atomically sets that bit can add this napi_struct |
310 | * to the per-cpu poll_list, and whoever clears that bit |
311 | * can remove from the list right before clearing the bit. |
312 | */ |
313 | struct list_head poll_list; |
314 | |
315 | unsigned long state; |
316 | int weight; |
317 | unsigned int gro_count; |
318 | int (*poll)(struct napi_struct *, int); |
319 | #ifdef CONFIG_NETPOLL |
320 | spinlock_t poll_lock; |
321 | int poll_owner; |
322 | #endif |
323 | struct net_device *dev; |
324 | struct sk_buff *gro_list; |
325 | struct sk_buff *skb; |
326 | struct list_head dev_list; |
327 | struct hlist_node napi_hash_node; |
328 | unsigned int napi_id; |
329 | }; |
330 | |
331 | enum { |
332 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
333 | NAPI_STATE_DISABLE, /* Disable pending */ |
334 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
335 | NAPI_STATE_HASHED, /* In NAPI hash */ |
336 | }; |
337 | |
338 | enum gro_result { |
339 | GRO_MERGED, |
340 | GRO_MERGED_FREE, |
341 | GRO_HELD, |
342 | GRO_NORMAL, |
343 | GRO_DROP, |
344 | }; |
345 | typedef enum gro_result gro_result_t; |
346 | |
347 | /* |
348 | * enum rx_handler_result - Possible return values for rx_handlers. |
349 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
350 | * further. |
351 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
352 | * case skb->dev was changed by rx_handler. |
353 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
354 | * @RX_HANDLER_PASS: Do nothing, passe the skb as if no rx_handler was called. |
355 | * |
356 | * rx_handlers are functions called from inside __netif_receive_skb(), to do |
357 | * special processing of the skb, prior to delivery to protocol handlers. |
358 | * |
359 | * Currently, a net_device can only have a single rx_handler registered. Trying |
360 | * to register a second rx_handler will return -EBUSY. |
361 | * |
362 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
363 | * To unregister a rx_handler on a net_device, use |
364 | * netdev_rx_handler_unregister(). |
365 | * |
366 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
367 | * do with the skb. |
368 | * |
369 | * If the rx_handler consumed to skb in some way, it should return |
370 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
371 | * the skb to be delivered in some other ways. |
372 | * |
373 | * If the rx_handler changed skb->dev, to divert the skb to another |
374 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
375 | * new device will be called if it exists. |
376 | * |
377 | * If the rx_handler consider the skb should be ignored, it should return |
378 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
379 | * are registered on exact device (ptype->dev == skb->dev). |
380 | * |
381 | * If the rx_handler didn't changed skb->dev, but want the skb to be normally |
382 | * delivered, it should return RX_HANDLER_PASS. |
383 | * |
384 | * A device without a registered rx_handler will behave as if rx_handler |
385 | * returned RX_HANDLER_PASS. |
386 | */ |
387 | |
388 | enum rx_handler_result { |
389 | RX_HANDLER_CONSUMED, |
390 | RX_HANDLER_ANOTHER, |
391 | RX_HANDLER_EXACT, |
392 | RX_HANDLER_PASS, |
393 | }; |
394 | typedef enum rx_handler_result rx_handler_result_t; |
395 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
396 | |
397 | void __napi_schedule(struct napi_struct *n); |
398 | |
399 | static inline bool napi_disable_pending(struct napi_struct *n) |
400 | { |
401 | return test_bit(NAPI_STATE_DISABLE, &n->state); |
402 | } |
403 | |
404 | /** |
405 | * napi_schedule_prep - check if napi can be scheduled |
406 | * @n: napi context |
407 | * |
408 | * Test if NAPI routine is already running, and if not mark |
409 | * it as running. This is used as a condition variable |
410 | * insure only one NAPI poll instance runs. We also make |
411 | * sure there is no pending NAPI disable. |
412 | */ |
413 | static inline bool napi_schedule_prep(struct napi_struct *n) |
414 | { |
415 | return !napi_disable_pending(n) && |
416 | !test_and_set_bit(NAPI_STATE_SCHED, &n->state); |
417 | } |
418 | |
419 | /** |
420 | * napi_schedule - schedule NAPI poll |
421 | * @n: napi context |
422 | * |
423 | * Schedule NAPI poll routine to be called if it is not already |
424 | * running. |
425 | */ |
426 | static inline void napi_schedule(struct napi_struct *n) |
427 | { |
428 | if (napi_schedule_prep(n)) |
429 | __napi_schedule(n); |
430 | } |
431 | |
432 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
433 | static inline bool napi_reschedule(struct napi_struct *napi) |
434 | { |
435 | if (napi_schedule_prep(napi)) { |
436 | __napi_schedule(napi); |
437 | return true; |
438 | } |
439 | return false; |
440 | } |
441 | |
442 | /** |
443 | * napi_complete - NAPI processing complete |
444 | * @n: napi context |
445 | * |
446 | * Mark NAPI processing as complete. |
447 | */ |
448 | void __napi_complete(struct napi_struct *n); |
449 | void napi_complete(struct napi_struct *n); |
450 | |
451 | /** |
452 | * napi_by_id - lookup a NAPI by napi_id |
453 | * @napi_id: hashed napi_id |
454 | * |
455 | * lookup @napi_id in napi_hash table |
456 | * must be called under rcu_read_lock() |
457 | */ |
458 | struct napi_struct *napi_by_id(unsigned int napi_id); |
459 | |
460 | /** |
461 | * napi_hash_add - add a NAPI to global hashtable |
462 | * @napi: napi context |
463 | * |
464 | * generate a new napi_id and store a @napi under it in napi_hash |
465 | */ |
466 | void napi_hash_add(struct napi_struct *napi); |
467 | |
468 | /** |
469 | * napi_hash_del - remove a NAPI from global table |
470 | * @napi: napi context |
471 | * |
472 | * Warning: caller must observe rcu grace period |
473 | * before freeing memory containing @napi |
474 | */ |
475 | void napi_hash_del(struct napi_struct *napi); |
476 | |
477 | /** |
478 | * napi_disable - prevent NAPI from scheduling |
479 | * @n: napi context |
480 | * |
481 | * Stop NAPI from being scheduled on this context. |
482 | * Waits till any outstanding processing completes. |
483 | */ |
484 | static inline void napi_disable(struct napi_struct *n) |
485 | { |
486 | might_sleep(); |
487 | set_bit(NAPI_STATE_DISABLE, &n->state); |
488 | while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) |
489 | msleep(1); |
490 | clear_bit(NAPI_STATE_DISABLE, &n->state); |
491 | } |
492 | |
493 | /** |
494 | * napi_enable - enable NAPI scheduling |
495 | * @n: napi context |
496 | * |
497 | * Resume NAPI from being scheduled on this context. |
498 | * Must be paired with napi_disable. |
499 | */ |
500 | static inline void napi_enable(struct napi_struct *n) |
501 | { |
502 | BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); |
503 | smp_mb__before_clear_bit(); |
504 | clear_bit(NAPI_STATE_SCHED, &n->state); |
505 | } |
506 | |
507 | #ifdef CONFIG_SMP |
508 | /** |
509 | * napi_synchronize - wait until NAPI is not running |
510 | * @n: napi context |
511 | * |
512 | * Wait until NAPI is done being scheduled on this context. |
513 | * Waits till any outstanding processing completes but |
514 | * does not disable future activations. |
515 | */ |
516 | static inline void napi_synchronize(const struct napi_struct *n) |
517 | { |
518 | while (test_bit(NAPI_STATE_SCHED, &n->state)) |
519 | msleep(1); |
520 | } |
521 | #else |
522 | # define napi_synchronize(n) barrier() |
523 | #endif |
524 | |
525 | enum netdev_queue_state_t { |
526 | __QUEUE_STATE_DRV_XOFF, |
527 | __QUEUE_STATE_STACK_XOFF, |
528 | __QUEUE_STATE_FROZEN, |
529 | #define QUEUE_STATE_ANY_XOFF ((1 << __QUEUE_STATE_DRV_XOFF) | \ |
530 | (1 << __QUEUE_STATE_STACK_XOFF)) |
531 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
532 | (1 << __QUEUE_STATE_FROZEN)) |
533 | }; |
534 | /* |
535 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The |
536 | * netif_tx_* functions below are used to manipulate this flag. The |
537 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit |
538 | * queue independently. The netif_xmit_*stopped functions below are called |
539 | * to check if the queue has been stopped by the driver or stack (either |
540 | * of the XOFF bits are set in the state). Drivers should not need to call |
541 | * netif_xmit*stopped functions, they should only be using netif_tx_*. |
542 | */ |
543 | |
544 | struct netdev_queue { |
545 | /* |
546 | * read mostly part |
547 | */ |
548 | struct net_device *dev; |
549 | struct Qdisc *qdisc; |
550 | struct Qdisc *qdisc_sleeping; |
551 | #ifdef CONFIG_SYSFS |
552 | struct kobject kobj; |
553 | #endif |
554 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
555 | int numa_node; |
556 | #endif |
557 | /* |
558 | * write mostly part |
559 | */ |
560 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
561 | int xmit_lock_owner; |
562 | /* |
563 | * please use this field instead of dev->trans_start |
564 | */ |
565 | unsigned long trans_start; |
566 | |
567 | /* |
568 | * Number of TX timeouts for this queue |
569 | * (/sys/class/net/DEV/Q/trans_timeout) |
570 | */ |
571 | unsigned long trans_timeout; |
572 | |
573 | unsigned long state; |
574 | |
575 | #ifdef CONFIG_BQL |
576 | struct dql dql; |
577 | #endif |
578 | } ____cacheline_aligned_in_smp; |
579 | |
580 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
581 | { |
582 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
583 | return q->numa_node; |
584 | #else |
585 | return NUMA_NO_NODE; |
586 | #endif |
587 | } |
588 | |
589 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) |
590 | { |
591 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
592 | q->numa_node = node; |
593 | #endif |
594 | } |
595 | |
596 | #ifdef CONFIG_RPS |
597 | /* |
598 | * This structure holds an RPS map which can be of variable length. The |
599 | * map is an array of CPUs. |
600 | */ |
601 | struct rps_map { |
602 | unsigned int len; |
603 | struct rcu_head rcu; |
604 | u16 cpus[0]; |
605 | }; |
606 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
607 | |
608 | /* |
609 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
610 | * tail pointer for that CPU's input queue at the time of last enqueue, and |
611 | * a hardware filter index. |
612 | */ |
613 | struct rps_dev_flow { |
614 | u16 cpu; |
615 | u16 filter; |
616 | unsigned int last_qtail; |
617 | }; |
618 | #define RPS_NO_FILTER 0xffff |
619 | |
620 | /* |
621 | * The rps_dev_flow_table structure contains a table of flow mappings. |
622 | */ |
623 | struct rps_dev_flow_table { |
624 | unsigned int mask; |
625 | struct rcu_head rcu; |
626 | struct rps_dev_flow flows[0]; |
627 | }; |
628 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ |
629 | ((_num) * sizeof(struct rps_dev_flow))) |
630 | |
631 | /* |
632 | * The rps_sock_flow_table contains mappings of flows to the last CPU |
633 | * on which they were processed by the application (set in recvmsg). |
634 | */ |
635 | struct rps_sock_flow_table { |
636 | unsigned int mask; |
637 | u16 ents[0]; |
638 | }; |
639 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_sock_flow_table) + \ |
640 | ((_num) * sizeof(u16))) |
641 | |
642 | #define RPS_NO_CPU 0xffff |
643 | |
644 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
645 | u32 hash) |
646 | { |
647 | if (table && hash) { |
648 | unsigned int cpu, index = hash & table->mask; |
649 | |
650 | /* We only give a hint, preemption can change cpu under us */ |
651 | cpu = raw_smp_processor_id(); |
652 | |
653 | if (table->ents[index] != cpu) |
654 | table->ents[index] = cpu; |
655 | } |
656 | } |
657 | |
658 | static inline void rps_reset_sock_flow(struct rps_sock_flow_table *table, |
659 | u32 hash) |
660 | { |
661 | if (table && hash) |
662 | table->ents[hash & table->mask] = RPS_NO_CPU; |
663 | } |
664 | |
665 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
666 | |
667 | #ifdef CONFIG_RFS_ACCEL |
668 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
669 | u16 filter_id); |
670 | #endif |
671 | |
672 | /* This structure contains an instance of an RX queue. */ |
673 | struct netdev_rx_queue { |
674 | struct rps_map __rcu *rps_map; |
675 | struct rps_dev_flow_table __rcu *rps_flow_table; |
676 | struct kobject kobj; |
677 | struct net_device *dev; |
678 | } ____cacheline_aligned_in_smp; |
679 | #endif /* CONFIG_RPS */ |
680 | |
681 | #ifdef CONFIG_XPS |
682 | /* |
683 | * This structure holds an XPS map which can be of variable length. The |
684 | * map is an array of queues. |
685 | */ |
686 | struct xps_map { |
687 | unsigned int len; |
688 | unsigned int alloc_len; |
689 | struct rcu_head rcu; |
690 | u16 queues[0]; |
691 | }; |
692 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
693 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_BYTES - sizeof(struct xps_map)) \ |
694 | / sizeof(u16)) |
695 | |
696 | /* |
697 | * This structure holds all XPS maps for device. Maps are indexed by CPU. |
698 | */ |
699 | struct xps_dev_maps { |
700 | struct rcu_head rcu; |
701 | struct xps_map __rcu *cpu_map[0]; |
702 | }; |
703 | #define XPS_DEV_MAPS_SIZE (sizeof(struct xps_dev_maps) + \ |
704 | (nr_cpu_ids * sizeof(struct xps_map *))) |
705 | #endif /* CONFIG_XPS */ |
706 | |
707 | #define TC_MAX_QUEUE 16 |
708 | #define TC_BITMASK 15 |
709 | /* HW offloaded queuing disciplines txq count and offset maps */ |
710 | struct netdev_tc_txq { |
711 | u16 count; |
712 | u16 offset; |
713 | }; |
714 | |
715 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
716 | /* |
717 | * This structure is to hold information about the device |
718 | * configured to run FCoE protocol stack. |
719 | */ |
720 | struct netdev_fcoe_hbainfo { |
721 | char manufacturer[64]; |
722 | char serial_number[64]; |
723 | char hardware_version[64]; |
724 | char driver_version[64]; |
725 | char optionrom_version[64]; |
726 | char firmware_version[64]; |
727 | char model[256]; |
728 | char model_description[256]; |
729 | }; |
730 | #endif |
731 | |
732 | #define MAX_PHYS_PORT_ID_LEN 32 |
733 | |
734 | /* This structure holds a unique identifier to identify the |
735 | * physical port used by a netdevice. |
736 | */ |
737 | struct netdev_phys_port_id { |
738 | unsigned char id[MAX_PHYS_PORT_ID_LEN]; |
739 | unsigned char id_len; |
740 | }; |
741 | |
742 | /* |
743 | * This structure defines the management hooks for network devices. |
744 | * The following hooks can be defined; unless noted otherwise, they are |
745 | * optional and can be filled with a null pointer. |
746 | * |
747 | * int (*ndo_init)(struct net_device *dev); |
748 | * This function is called once when network device is registered. |
749 | * The network device can use this to any late stage initializaton |
750 | * or semantic validattion. It can fail with an error code which will |
751 | * be propogated back to register_netdev |
752 | * |
753 | * void (*ndo_uninit)(struct net_device *dev); |
754 | * This function is called when device is unregistered or when registration |
755 | * fails. It is not called if init fails. |
756 | * |
757 | * int (*ndo_open)(struct net_device *dev); |
758 | * This function is called when network device transistions to the up |
759 | * state. |
760 | * |
761 | * int (*ndo_stop)(struct net_device *dev); |
762 | * This function is called when network device transistions to the down |
763 | * state. |
764 | * |
765 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
766 | * struct net_device *dev); |
767 | * Called when a packet needs to be transmitted. |
768 | * Must return NETDEV_TX_OK , NETDEV_TX_BUSY. |
769 | * (can also return NETDEV_TX_LOCKED iff NETIF_F_LLTX) |
770 | * Required can not be NULL. |
771 | * |
772 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
773 | * void *accel_priv); |
774 | * Called to decide which queue to when device supports multiple |
775 | * transmit queues. |
776 | * |
777 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
778 | * This function is called to allow device receiver to make |
779 | * changes to configuration when multicast or promiscious is enabled. |
780 | * |
781 | * void (*ndo_set_rx_mode)(struct net_device *dev); |
782 | * This function is called device changes address list filtering. |
783 | * If driver handles unicast address filtering, it should set |
784 | * IFF_UNICAST_FLT to its priv_flags. |
785 | * |
786 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
787 | * This function is called when the Media Access Control address |
788 | * needs to be changed. If this interface is not defined, the |
789 | * mac address can not be changed. |
790 | * |
791 | * int (*ndo_validate_addr)(struct net_device *dev); |
792 | * Test if Media Access Control address is valid for the device. |
793 | * |
794 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
795 | * Called when a user request an ioctl which can't be handled by |
796 | * the generic interface code. If not defined ioctl's return |
797 | * not supported error code. |
798 | * |
799 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
800 | * Used to set network devices bus interface parameters. This interface |
801 | * is retained for legacy reason, new devices should use the bus |
802 | * interface (PCI) for low level management. |
803 | * |
804 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
805 | * Called when a user wants to change the Maximum Transfer Unit |
806 | * of a device. If not defined, any request to change MTU will |
807 | * will return an error. |
808 | * |
809 | * void (*ndo_tx_timeout)(struct net_device *dev); |
810 | * Callback uses when the transmitter has not made any progress |
811 | * for dev->watchdog ticks. |
812 | * |
813 | * struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
814 | * struct rtnl_link_stats64 *storage); |
815 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
816 | * Called when a user wants to get the network device usage |
817 | * statistics. Drivers must do one of the following: |
818 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
819 | * rtnl_link_stats64 structure passed by the caller. |
820 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
821 | * (which should normally be dev->stats) and return a pointer to |
822 | * it. The structure may be changed asynchronously only if each |
823 | * field is written atomically. |
824 | * 3. Update dev->stats asynchronously and atomically, and define |
825 | * neither operation. |
826 | * |
827 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16t vid); |
828 | * If device support VLAN filtering this function is called when a |
829 | * VLAN id is registered. |
830 | * |
831 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, unsigned short vid); |
832 | * If device support VLAN filtering this function is called when a |
833 | * VLAN id is unregistered. |
834 | * |
835 | * void (*ndo_poll_controller)(struct net_device *dev); |
836 | * |
837 | * SR-IOV management functions. |
838 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
839 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, u8 qos); |
840 | * int (*ndo_set_vf_tx_rate)(struct net_device *dev, int vf, int rate); |
841 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
842 | * int (*ndo_get_vf_config)(struct net_device *dev, |
843 | * int vf, struct ifla_vf_info *ivf); |
844 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
845 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
846 | * struct nlattr *port[]); |
847 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
848 | * int (*ndo_setup_tc)(struct net_device *dev, u8 tc) |
849 | * Called to setup 'tc' number of traffic classes in the net device. This |
850 | * is always called from the stack with the rtnl lock held and netif tx |
851 | * queues stopped. This allows the netdevice to perform queue management |
852 | * safely. |
853 | * |
854 | * Fiber Channel over Ethernet (FCoE) offload functions. |
855 | * int (*ndo_fcoe_enable)(struct net_device *dev); |
856 | * Called when the FCoE protocol stack wants to start using LLD for FCoE |
857 | * so the underlying device can perform whatever needed configuration or |
858 | * initialization to support acceleration of FCoE traffic. |
859 | * |
860 | * int (*ndo_fcoe_disable)(struct net_device *dev); |
861 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
862 | * so the underlying device can perform whatever needed clean-ups to |
863 | * stop supporting acceleration of FCoE traffic. |
864 | * |
865 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
866 | * struct scatterlist *sgl, unsigned int sgc); |
867 | * Called when the FCoE Initiator wants to initialize an I/O that |
868 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
869 | * perform necessary setup and returns 1 to indicate the device is set up |
870 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
871 | * |
872 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
873 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
874 | * indicated by the FC exchange id 'xid', so the underlying device can |
875 | * clean up and reuse resources for later DDP requests. |
876 | * |
877 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
878 | * struct scatterlist *sgl, unsigned int sgc); |
879 | * Called when the FCoE Target wants to initialize an I/O that |
880 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
881 | * perform necessary setup and returns 1 to indicate the device is set up |
882 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
883 | * |
884 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
885 | * struct netdev_fcoe_hbainfo *hbainfo); |
886 | * Called when the FCoE Protocol stack wants information on the underlying |
887 | * device. This information is utilized by the FCoE protocol stack to |
888 | * register attributes with Fiber Channel management service as per the |
889 | * FC-GS Fabric Device Management Information(FDMI) specification. |
890 | * |
891 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
892 | * Called when the underlying device wants to override default World Wide |
893 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
894 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
895 | * protocol stack to use. |
896 | * |
897 | * RFS acceleration. |
898 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
899 | * u16 rxq_index, u32 flow_id); |
900 | * Set hardware filter for RFS. rxq_index is the target queue index; |
901 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
902 | * Return the filter ID on success, or a negative error code. |
903 | * |
904 | * Slave management functions (for bridge, bonding, etc). |
905 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
906 | * Called to make another netdev an underling. |
907 | * |
908 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
909 | * Called to release previously enslaved netdev. |
910 | * |
911 | * Feature/offload setting functions. |
912 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
913 | * netdev_features_t features); |
914 | * Adjusts the requested feature flags according to device-specific |
915 | * constraints, and returns the resulting flags. Must not modify |
916 | * the device state. |
917 | * |
918 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
919 | * Called to update device configuration to new features. Passed |
920 | * feature set might be less than what was returned by ndo_fix_features()). |
921 | * Must return >0 or -errno if it changed dev->features itself. |
922 | * |
923 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
924 | * struct net_device *dev, |
925 | * const unsigned char *addr, u16 flags) |
926 | * Adds an FDB entry to dev for addr. |
927 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
928 | * struct net_device *dev, |
929 | * const unsigned char *addr) |
930 | * Deletes the FDB entry from dev coresponding to addr. |
931 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, |
932 | * struct net_device *dev, int idx) |
933 | * Used to add FDB entries to dump requests. Implementers should add |
934 | * entries to skb and update idx with the number of entries. |
935 | * |
936 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh) |
937 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
938 | * struct net_device *dev, u32 filter_mask) |
939 | * |
940 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); |
941 | * Called to change device carrier. Soft-devices (like dummy, team, etc) |
942 | * which do not represent real hardware may define this to allow their |
943 | * userspace components to manage their virtual carrier state. Devices |
944 | * that determine carrier state from physical hardware properties (eg |
945 | * network cables) or protocol-dependent mechanisms (eg |
946 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. |
947 | * |
948 | * int (*ndo_get_phys_port_id)(struct net_device *dev, |
949 | * struct netdev_phys_port_id *ppid); |
950 | * Called to get ID of physical port of this device. If driver does |
951 | * not implement this, it is assumed that the hw is not able to have |
952 | * multiple net devices on single physical port. |
953 | * |
954 | * void (*ndo_add_vxlan_port)(struct net_device *dev, |
955 | * sa_family_t sa_family, __be16 port); |
956 | * Called by vxlan to notiy a driver about the UDP port and socket |
957 | * address family that vxlan is listnening to. It is called only when |
958 | * a new port starts listening. The operation is protected by the |
959 | * vxlan_net->sock_lock. |
960 | * |
961 | * void (*ndo_del_vxlan_port)(struct net_device *dev, |
962 | * sa_family_t sa_family, __be16 port); |
963 | * Called by vxlan to notify the driver about a UDP port and socket |
964 | * address family that vxlan is not listening to anymore. The operation |
965 | * is protected by the vxlan_net->sock_lock. |
966 | * |
967 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
968 | * struct net_device *dev) |
969 | * Called by upper layer devices to accelerate switching or other |
970 | * station functionality into hardware. 'pdev is the lowerdev |
971 | * to use for the offload and 'dev' is the net device that will |
972 | * back the offload. Returns a pointer to the private structure |
973 | * the upper layer will maintain. |
974 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) |
975 | * Called by upper layer device to delete the station created |
976 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing |
977 | * the station and priv is the structure returned by the add |
978 | * operation. |
979 | * netdev_tx_t (*ndo_dfwd_start_xmit)(struct sk_buff *skb, |
980 | * struct net_device *dev, |
981 | * void *priv); |
982 | * Callback to use for xmit over the accelerated station. This |
983 | * is used in place of ndo_start_xmit on accelerated net |
984 | * devices. |
985 | */ |
986 | struct net_device_ops { |
987 | int (*ndo_init)(struct net_device *dev); |
988 | void (*ndo_uninit)(struct net_device *dev); |
989 | int (*ndo_open)(struct net_device *dev); |
990 | int (*ndo_stop)(struct net_device *dev); |
991 | netdev_tx_t (*ndo_start_xmit) (struct sk_buff *skb, |
992 | struct net_device *dev); |
993 | u16 (*ndo_select_queue)(struct net_device *dev, |
994 | struct sk_buff *skb, |
995 | void *accel_priv); |
996 | void (*ndo_change_rx_flags)(struct net_device *dev, |
997 | int flags); |
998 | void (*ndo_set_rx_mode)(struct net_device *dev); |
999 | int (*ndo_set_mac_address)(struct net_device *dev, |
1000 | void *addr); |
1001 | int (*ndo_validate_addr)(struct net_device *dev); |
1002 | int (*ndo_do_ioctl)(struct net_device *dev, |
1003 | struct ifreq *ifr, int cmd); |
1004 | int (*ndo_set_config)(struct net_device *dev, |
1005 | struct ifmap *map); |
1006 | int (*ndo_change_mtu)(struct net_device *dev, |
1007 | int new_mtu); |
1008 | int (*ndo_neigh_setup)(struct net_device *dev, |
1009 | struct neigh_parms *); |
1010 | void (*ndo_tx_timeout) (struct net_device *dev); |
1011 | |
1012 | struct rtnl_link_stats64* (*ndo_get_stats64)(struct net_device *dev, |
1013 | struct rtnl_link_stats64 *storage); |
1014 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1015 | |
1016 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
1017 | __be16 proto, u16 vid); |
1018 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
1019 | __be16 proto, u16 vid); |
1020 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1021 | void (*ndo_poll_controller)(struct net_device *dev); |
1022 | int (*ndo_netpoll_setup)(struct net_device *dev, |
1023 | struct netpoll_info *info, |
1024 | gfp_t gfp); |
1025 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
1026 | #endif |
1027 | #ifdef CONFIG_NET_RX_BUSY_POLL |
1028 | int (*ndo_busy_poll)(struct napi_struct *dev); |
1029 | #endif |
1030 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1031 | int queue, u8 *mac); |
1032 | int (*ndo_set_vf_vlan)(struct net_device *dev, |
1033 | int queue, u16 vlan, u8 qos); |
1034 | int (*ndo_set_vf_tx_rate)(struct net_device *dev, |
1035 | int vf, int rate); |
1036 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1037 | int vf, bool setting); |
1038 | int (*ndo_get_vf_config)(struct net_device *dev, |
1039 | int vf, |
1040 | struct ifla_vf_info *ivf); |
1041 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1042 | int vf, int link_state); |
1043 | int (*ndo_set_vf_port)(struct net_device *dev, |
1044 | int vf, |
1045 | struct nlattr *port[]); |
1046 | int (*ndo_get_vf_port)(struct net_device *dev, |
1047 | int vf, struct sk_buff *skb); |
1048 | int (*ndo_setup_tc)(struct net_device *dev, u8 tc); |
1049 | #if IS_ENABLED(CONFIG_FCOE) |
1050 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1051 | int (*ndo_fcoe_disable)(struct net_device *dev); |
1052 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1053 | u16 xid, |
1054 | struct scatterlist *sgl, |
1055 | unsigned int sgc); |
1056 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
1057 | u16 xid); |
1058 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1059 | u16 xid, |
1060 | struct scatterlist *sgl, |
1061 | unsigned int sgc); |
1062 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1063 | struct netdev_fcoe_hbainfo *hbainfo); |
1064 | #endif |
1065 | |
1066 | #if IS_ENABLED(CONFIG_LIBFCOE) |
1067 | #define NETDEV_FCOE_WWNN 0 |
1068 | #define NETDEV_FCOE_WWPN 1 |
1069 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
1070 | u64 *wwn, int type); |
1071 | #endif |
1072 | |
1073 | #ifdef CONFIG_RFS_ACCEL |
1074 | int (*ndo_rx_flow_steer)(struct net_device *dev, |
1075 | const struct sk_buff *skb, |
1076 | u16 rxq_index, |
1077 | u32 flow_id); |
1078 | #endif |
1079 | int (*ndo_add_slave)(struct net_device *dev, |
1080 | struct net_device *slave_dev); |
1081 | int (*ndo_del_slave)(struct net_device *dev, |
1082 | struct net_device *slave_dev); |
1083 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1084 | netdev_features_t features); |
1085 | int (*ndo_set_features)(struct net_device *dev, |
1086 | netdev_features_t features); |
1087 | int (*ndo_neigh_construct)(struct neighbour *n); |
1088 | void (*ndo_neigh_destroy)(struct neighbour *n); |
1089 | |
1090 | int (*ndo_fdb_add)(struct ndmsg *ndm, |
1091 | struct nlattr *tb[], |
1092 | struct net_device *dev, |
1093 | const unsigned char *addr, |
1094 | u16 flags); |
1095 | int (*ndo_fdb_del)(struct ndmsg *ndm, |
1096 | struct nlattr *tb[], |
1097 | struct net_device *dev, |
1098 | const unsigned char *addr); |
1099 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1100 | struct netlink_callback *cb, |
1101 | struct net_device *dev, |
1102 | int idx); |
1103 | |
1104 | int (*ndo_bridge_setlink)(struct net_device *dev, |
1105 | struct nlmsghdr *nlh); |
1106 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1107 | u32 pid, u32 seq, |
1108 | struct net_device *dev, |
1109 | u32 filter_mask); |
1110 | int (*ndo_bridge_dellink)(struct net_device *dev, |
1111 | struct nlmsghdr *nlh); |
1112 | int (*ndo_change_carrier)(struct net_device *dev, |
1113 | bool new_carrier); |
1114 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
1115 | struct netdev_phys_port_id *ppid); |
1116 | void (*ndo_add_vxlan_port)(struct net_device *dev, |
1117 | sa_family_t sa_family, |
1118 | __be16 port); |
1119 | void (*ndo_del_vxlan_port)(struct net_device *dev, |
1120 | sa_family_t sa_family, |
1121 | __be16 port); |
1122 | |
1123 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1124 | struct net_device *dev); |
1125 | void (*ndo_dfwd_del_station)(struct net_device *pdev, |
1126 | void *priv); |
1127 | |
1128 | netdev_tx_t (*ndo_dfwd_start_xmit) (struct sk_buff *skb, |
1129 | struct net_device *dev, |
1130 | void *priv); |
1131 | }; |
1132 | |
1133 | /* |
1134 | * The DEVICE structure. |
1135 | * Actually, this whole structure is a big mistake. It mixes I/O |
1136 | * data with strictly "high-level" data, and it has to know about |
1137 | * almost every data structure used in the INET module. |
1138 | * |
1139 | * FIXME: cleanup struct net_device such that network protocol info |
1140 | * moves out. |
1141 | */ |
1142 | |
1143 | struct net_device { |
1144 | |
1145 | /* |
1146 | * This is the first field of the "visible" part of this structure |
1147 | * (i.e. as seen by users in the "Space.c" file). It is the name |
1148 | * of the interface. |
1149 | */ |
1150 | char name[IFNAMSIZ]; |
1151 | |
1152 | /* device name hash chain, please keep it close to name[] */ |
1153 | struct hlist_node name_hlist; |
1154 | |
1155 | /* snmp alias */ |
1156 | char *ifalias; |
1157 | |
1158 | /* |
1159 | * I/O specific fields |
1160 | * FIXME: Merge these and struct ifmap into one |
1161 | */ |
1162 | unsigned long mem_end; /* shared mem end */ |
1163 | unsigned long mem_start; /* shared mem start */ |
1164 | unsigned long base_addr; /* device I/O address */ |
1165 | int irq; /* device IRQ number */ |
1166 | |
1167 | /* |
1168 | * Some hardware also needs these fields, but they are not |
1169 | * part of the usual set specified in Space.c. |
1170 | */ |
1171 | |
1172 | unsigned long state; |
1173 | |
1174 | struct list_head dev_list; |
1175 | struct list_head napi_list; |
1176 | struct list_head unreg_list; |
1177 | struct list_head close_list; |
1178 | |
1179 | /* directly linked devices, like slaves for bonding */ |
1180 | struct { |
1181 | struct list_head upper; |
1182 | struct list_head lower; |
1183 | } adj_list; |
1184 | |
1185 | /* all linked devices, *including* neighbours */ |
1186 | struct { |
1187 | struct list_head upper; |
1188 | struct list_head lower; |
1189 | } all_adj_list; |
1190 | |
1191 | |
1192 | /* currently active device features */ |
1193 | netdev_features_t features; |
1194 | /* user-changeable features */ |
1195 | netdev_features_t hw_features; |
1196 | /* user-requested features */ |
1197 | netdev_features_t wanted_features; |
1198 | /* mask of features inheritable by VLAN devices */ |
1199 | netdev_features_t vlan_features; |
1200 | /* mask of features inherited by encapsulating devices |
1201 | * This field indicates what encapsulation offloads |
1202 | * the hardware is capable of doing, and drivers will |
1203 | * need to set them appropriately. |
1204 | */ |
1205 | netdev_features_t hw_enc_features; |
1206 | /* mask of fetures inheritable by MPLS */ |
1207 | netdev_features_t mpls_features; |
1208 | |
1209 | /* Interface index. Unique device identifier */ |
1210 | int ifindex; |
1211 | int iflink; |
1212 | |
1213 | struct net_device_stats stats; |
1214 | atomic_long_t rx_dropped; /* dropped packets by core network |
1215 | * Do not use this in drivers. |
1216 | */ |
1217 | |
1218 | #ifdef CONFIG_WIRELESS_EXT |
1219 | /* List of functions to handle Wireless Extensions (instead of ioctl). |
1220 | * See <net/iw_handler.h> for details. Jean II */ |
1221 | const struct iw_handler_def * wireless_handlers; |
1222 | /* Instance data managed by the core of Wireless Extensions. */ |
1223 | struct iw_public_data * wireless_data; |
1224 | #endif |
1225 | /* Management operations */ |
1226 | const struct net_device_ops *netdev_ops; |
1227 | const struct ethtool_ops *ethtool_ops; |
1228 | const struct forwarding_accel_ops *fwd_ops; |
1229 | |
1230 | /* Hardware header description */ |
1231 | const struct header_ops *header_ops; |
1232 | |
1233 | unsigned int flags; /* interface flags (a la BSD) */ |
1234 | unsigned int priv_flags; /* Like 'flags' but invisible to userspace. |
1235 | * See if.h for definitions. */ |
1236 | unsigned short gflags; |
1237 | unsigned short padded; /* How much padding added by alloc_netdev() */ |
1238 | |
1239 | unsigned char operstate; /* RFC2863 operstate */ |
1240 | unsigned char link_mode; /* mapping policy to operstate */ |
1241 | |
1242 | unsigned char if_port; /* Selectable AUI, TP,..*/ |
1243 | unsigned char dma; /* DMA channel */ |
1244 | |
1245 | unsigned int mtu; /* interface MTU value */ |
1246 | unsigned short type; /* interface hardware type */ |
1247 | unsigned short hard_header_len; /* hardware hdr length */ |
1248 | |
1249 | /* extra head- and tailroom the hardware may need, but not in all cases |
1250 | * can this be guaranteed, especially tailroom. Some cases also use |
1251 | * LL_MAX_HEADER instead to allocate the skb. |
1252 | */ |
1253 | unsigned short needed_headroom; |
1254 | unsigned short needed_tailroom; |
1255 | |
1256 | /* Interface address info. */ |
1257 | unsigned char perm_addr[MAX_ADDR_LEN]; /* permanent hw address */ |
1258 | unsigned char addr_assign_type; /* hw address assignment type */ |
1259 | unsigned char addr_len; /* hardware address length */ |
1260 | unsigned short neigh_priv_len; |
1261 | unsigned short dev_id; /* Used to differentiate devices |
1262 | * that share the same link |
1263 | * layer address |
1264 | */ |
1265 | spinlock_t addr_list_lock; |
1266 | struct netdev_hw_addr_list uc; /* Unicast mac addresses */ |
1267 | struct netdev_hw_addr_list mc; /* Multicast mac addresses */ |
1268 | struct netdev_hw_addr_list dev_addrs; /* list of device |
1269 | * hw addresses |
1270 | */ |
1271 | #ifdef CONFIG_SYSFS |
1272 | struct kset *queues_kset; |
1273 | #endif |
1274 | |
1275 | bool uc_promisc; |
1276 | unsigned int promiscuity; |
1277 | unsigned int allmulti; |
1278 | |
1279 | |
1280 | /* Protocol specific pointers */ |
1281 | |
1282 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
1283 | struct vlan_info __rcu *vlan_info; /* VLAN info */ |
1284 | #endif |
1285 | #if IS_ENABLED(CONFIG_NET_DSA) |
1286 | struct dsa_switch_tree *dsa_ptr; /* dsa specific data */ |
1287 | #endif |
1288 | void *atalk_ptr; /* AppleTalk link */ |
1289 | struct in_device __rcu *ip_ptr; /* IPv4 specific data */ |
1290 | struct dn_dev __rcu *dn_ptr; /* DECnet specific data */ |
1291 | struct inet6_dev __rcu *ip6_ptr; /* IPv6 specific data */ |
1292 | void *ax25_ptr; /* AX.25 specific data */ |
1293 | struct wireless_dev *ieee80211_ptr; /* IEEE 802.11 specific data, |
1294 | assign before registering */ |
1295 | |
1296 | /* |
1297 | * Cache lines mostly used on receive path (including eth_type_trans()) |
1298 | */ |
1299 | unsigned long last_rx; /* Time of last Rx |
1300 | * This should not be set in |
1301 | * drivers, unless really needed, |
1302 | * because network stack (bonding) |
1303 | * use it if/when necessary, to |
1304 | * avoid dirtying this cache line. |
1305 | */ |
1306 | |
1307 | /* Interface address info used in eth_type_trans() */ |
1308 | unsigned char *dev_addr; /* hw address, (before bcast |
1309 | because most packets are |
1310 | unicast) */ |
1311 | |
1312 | |
1313 | #ifdef CONFIG_RPS |
1314 | struct netdev_rx_queue *_rx; |
1315 | |
1316 | /* Number of RX queues allocated at register_netdev() time */ |
1317 | unsigned int num_rx_queues; |
1318 | |
1319 | /* Number of RX queues currently active in device */ |
1320 | unsigned int real_num_rx_queues; |
1321 | |
1322 | #endif |
1323 | |
1324 | rx_handler_func_t __rcu *rx_handler; |
1325 | void __rcu *rx_handler_data; |
1326 | |
1327 | struct netdev_queue __rcu *ingress_queue; |
1328 | unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */ |
1329 | |
1330 | |
1331 | /* |
1332 | * Cache lines mostly used on transmit path |
1333 | */ |
1334 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
1335 | |
1336 | /* Number of TX queues allocated at alloc_netdev_mq() time */ |
1337 | unsigned int num_tx_queues; |
1338 | |
1339 | /* Number of TX queues currently active in device */ |
1340 | unsigned int real_num_tx_queues; |
1341 | |
1342 | /* root qdisc from userspace point of view */ |
1343 | struct Qdisc *qdisc; |
1344 | |
1345 | unsigned long tx_queue_len; /* Max frames per queue allowed */ |
1346 | spinlock_t tx_global_lock; |
1347 | |
1348 | #ifdef CONFIG_XPS |
1349 | struct xps_dev_maps __rcu *xps_maps; |
1350 | #endif |
1351 | #ifdef CONFIG_RFS_ACCEL |
1352 | /* CPU reverse-mapping for RX completion interrupts, indexed |
1353 | * by RX queue number. Assigned by driver. This must only be |
1354 | * set if the ndo_rx_flow_steer operation is defined. */ |
1355 | struct cpu_rmap *rx_cpu_rmap; |
1356 | #endif |
1357 | |
1358 | /* These may be needed for future network-power-down code. */ |
1359 | |
1360 | /* |
1361 | * trans_start here is expensive for high speed devices on SMP, |
1362 | * please use netdev_queue->trans_start instead. |
1363 | */ |
1364 | unsigned long trans_start; /* Time (in jiffies) of last Tx */ |
1365 | |
1366 | int watchdog_timeo; /* used by dev_watchdog() */ |
1367 | struct timer_list watchdog_timer; |
1368 | |
1369 | /* Number of references to this device */ |
1370 | int __percpu *pcpu_refcnt; |
1371 | |
1372 | /* delayed register/unregister */ |
1373 | struct list_head todo_list; |
1374 | /* device index hash chain */ |
1375 | struct hlist_node index_hlist; |
1376 | |
1377 | struct list_head link_watch_list; |
1378 | |
1379 | /* register/unregister state machine */ |
1380 | enum { NETREG_UNINITIALIZED=0, |
1381 | NETREG_REGISTERED, /* completed register_netdevice */ |
1382 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
1383 | NETREG_UNREGISTERED, /* completed unregister todo */ |
1384 | NETREG_RELEASED, /* called free_netdev */ |
1385 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
1386 | } reg_state:8; |
1387 | |
1388 | bool dismantle; /* device is going do be freed */ |
1389 | |
1390 | enum { |
1391 | RTNL_LINK_INITIALIZED, |
1392 | RTNL_LINK_INITIALIZING, |
1393 | } rtnl_link_state:16; |
1394 | |
1395 | /* Called from unregister, can be used to call free_netdev */ |
1396 | void (*destructor)(struct net_device *dev); |
1397 | |
1398 | #ifdef CONFIG_NETPOLL |
1399 | struct netpoll_info __rcu *npinfo; |
1400 | #endif |
1401 | |
1402 | #ifdef CONFIG_NET_NS |
1403 | /* Network namespace this network device is inside */ |
1404 | struct net *nd_net; |
1405 | #endif |
1406 | |
1407 | /* mid-layer private */ |
1408 | union { |
1409 | void *ml_priv; |
1410 | struct pcpu_lstats __percpu *lstats; /* loopback stats */ |
1411 | struct pcpu_tstats __percpu *tstats; /* tunnel stats */ |
1412 | struct pcpu_dstats __percpu *dstats; /* dummy stats */ |
1413 | struct pcpu_vstats __percpu *vstats; /* veth stats */ |
1414 | }; |
1415 | /* GARP */ |
1416 | struct garp_port __rcu *garp_port; |
1417 | /* MRP */ |
1418 | struct mrp_port __rcu *mrp_port; |
1419 | |
1420 | /* class/net/name entry */ |
1421 | struct device dev; |
1422 | /* space for optional device, statistics, and wireless sysfs groups */ |
1423 | const struct attribute_group *sysfs_groups[4]; |
1424 | |
1425 | /* rtnetlink link ops */ |
1426 | const struct rtnl_link_ops *rtnl_link_ops; |
1427 | |
1428 | /* for setting kernel sock attribute on TCP connection setup */ |
1429 | #define GSO_MAX_SIZE 65536 |
1430 | unsigned int gso_max_size; |
1431 | #define GSO_MAX_SEGS 65535 |
1432 | u16 gso_max_segs; |
1433 | |
1434 | #ifdef CONFIG_DCB |
1435 | /* Data Center Bridging netlink ops */ |
1436 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
1437 | #endif |
1438 | u8 num_tc; |
1439 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; |
1440 | u8 prio_tc_map[TC_BITMASK + 1]; |
1441 | |
1442 | #if IS_ENABLED(CONFIG_FCOE) |
1443 | /* max exchange id for FCoE LRO by ddp */ |
1444 | unsigned int fcoe_ddp_xid; |
1445 | #endif |
1446 | #if IS_ENABLED(CONFIG_NETPRIO_CGROUP) |
1447 | struct netprio_map __rcu *priomap; |
1448 | #endif |
1449 | /* phy device may attach itself for hardware timestamping */ |
1450 | struct phy_device *phydev; |
1451 | |
1452 | struct lock_class_key *qdisc_tx_busylock; |
1453 | |
1454 | /* group the device belongs to */ |
1455 | int group; |
1456 | |
1457 | struct pm_qos_request pm_qos_req; |
1458 | }; |
1459 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
1460 | |
1461 | #define NETDEV_ALIGN 32 |
1462 | |
1463 | static inline |
1464 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
1465 | { |
1466 | return dev->prio_tc_map[prio & TC_BITMASK]; |
1467 | } |
1468 | |
1469 | static inline |
1470 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
1471 | { |
1472 | if (tc >= dev->num_tc) |
1473 | return -EINVAL; |
1474 | |
1475 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
1476 | return 0; |
1477 | } |
1478 | |
1479 | static inline |
1480 | void netdev_reset_tc(struct net_device *dev) |
1481 | { |
1482 | dev->num_tc = 0; |
1483 | memset(dev->tc_to_txq, 0, sizeof(dev->tc_to_txq)); |
1484 | memset(dev->prio_tc_map, 0, sizeof(dev->prio_tc_map)); |
1485 | } |
1486 | |
1487 | static inline |
1488 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset) |
1489 | { |
1490 | if (tc >= dev->num_tc) |
1491 | return -EINVAL; |
1492 | |
1493 | dev->tc_to_txq[tc].count = count; |
1494 | dev->tc_to_txq[tc].offset = offset; |
1495 | return 0; |
1496 | } |
1497 | |
1498 | static inline |
1499 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc) |
1500 | { |
1501 | if (num_tc > TC_MAX_QUEUE) |
1502 | return -EINVAL; |
1503 | |
1504 | dev->num_tc = num_tc; |
1505 | return 0; |
1506 | } |
1507 | |
1508 | static inline |
1509 | int netdev_get_num_tc(struct net_device *dev) |
1510 | { |
1511 | return dev->num_tc; |
1512 | } |
1513 | |
1514 | static inline |
1515 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
1516 | unsigned int index) |
1517 | { |
1518 | return &dev->_tx[index]; |
1519 | } |
1520 | |
1521 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
1522 | void (*f)(struct net_device *, |
1523 | struct netdev_queue *, |
1524 | void *), |
1525 | void *arg) |
1526 | { |
1527 | unsigned int i; |
1528 | |
1529 | for (i = 0; i < dev->num_tx_queues; i++) |
1530 | f(dev, &dev->_tx[i], arg); |
1531 | } |
1532 | |
1533 | struct netdev_queue *netdev_pick_tx(struct net_device *dev, |
1534 | struct sk_buff *skb, |
1535 | void *accel_priv); |
1536 | u16 __netdev_pick_tx(struct net_device *dev, struct sk_buff *skb); |
1537 | |
1538 | /* |
1539 | * Net namespace inlines |
1540 | */ |
1541 | static inline |
1542 | struct net *dev_net(const struct net_device *dev) |
1543 | { |
1544 | return read_pnet(&dev->nd_net); |
1545 | } |
1546 | |
1547 | static inline |
1548 | void dev_net_set(struct net_device *dev, struct net *net) |
1549 | { |
1550 | #ifdef CONFIG_NET_NS |
1551 | release_net(dev->nd_net); |
1552 | dev->nd_net = hold_net(net); |
1553 | #endif |
1554 | } |
1555 | |
1556 | static inline bool netdev_uses_dsa_tags(struct net_device *dev) |
1557 | { |
1558 | #ifdef CONFIG_NET_DSA_TAG_DSA |
1559 | if (dev->dsa_ptr != NULL) |
1560 | return dsa_uses_dsa_tags(dev->dsa_ptr); |
1561 | #endif |
1562 | |
1563 | return 0; |
1564 | } |
1565 | |
1566 | static inline bool netdev_uses_trailer_tags(struct net_device *dev) |
1567 | { |
1568 | #ifdef CONFIG_NET_DSA_TAG_TRAILER |
1569 | if (dev->dsa_ptr != NULL) |
1570 | return dsa_uses_trailer_tags(dev->dsa_ptr); |
1571 | #endif |
1572 | |
1573 | return 0; |
1574 | } |
1575 | |
1576 | /** |
1577 | * netdev_priv - access network device private data |
1578 | * @dev: network device |
1579 | * |
1580 | * Get network device private data |
1581 | */ |
1582 | static inline void *netdev_priv(const struct net_device *dev) |
1583 | { |
1584 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
1585 | } |
1586 | |
1587 | /* Set the sysfs physical device reference for the network logical device |
1588 | * if set prior to registration will cause a symlink during initialization. |
1589 | */ |
1590 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
1591 | |
1592 | /* Set the sysfs device type for the network logical device to allow |
1593 | * fine-grained identification of different network device types. For |
1594 | * example Ethernet, Wirelss LAN, Bluetooth, WiMAX etc. |
1595 | */ |
1596 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
1597 | |
1598 | /* Default NAPI poll() weight |
1599 | * Device drivers are strongly advised to not use bigger value |
1600 | */ |
1601 | #define NAPI_POLL_WEIGHT 64 |
1602 | |
1603 | /** |
1604 | * netif_napi_add - initialize a napi context |
1605 | * @dev: network device |
1606 | * @napi: napi context |
1607 | * @poll: polling function |
1608 | * @weight: default weight |
1609 | * |
1610 | * netif_napi_add() must be used to initialize a napi context prior to calling |
1611 | * *any* of the other napi related functions. |
1612 | */ |
1613 | void netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
1614 | int (*poll)(struct napi_struct *, int), int weight); |
1615 | |
1616 | /** |
1617 | * netif_napi_del - remove a napi context |
1618 | * @napi: napi context |
1619 | * |
1620 | * netif_napi_del() removes a napi context from the network device napi list |
1621 | */ |
1622 | void netif_napi_del(struct napi_struct *napi); |
1623 | |
1624 | struct napi_gro_cb { |
1625 | /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */ |
1626 | void *frag0; |
1627 | |
1628 | /* Length of frag0. */ |
1629 | unsigned int frag0_len; |
1630 | |
1631 | /* This indicates where we are processing relative to skb->data. */ |
1632 | int data_offset; |
1633 | |
1634 | /* This is non-zero if the packet cannot be merged with the new skb. */ |
1635 | int flush; |
1636 | |
1637 | /* Number of segments aggregated. */ |
1638 | u16 count; |
1639 | |
1640 | /* This is non-zero if the packet may be of the same flow. */ |
1641 | u8 same_flow; |
1642 | |
1643 | /* Free the skb? */ |
1644 | u8 free; |
1645 | #define NAPI_GRO_FREE 1 |
1646 | #define NAPI_GRO_FREE_STOLEN_HEAD 2 |
1647 | |
1648 | /* jiffies when first packet was created/queued */ |
1649 | unsigned long age; |
1650 | |
1651 | /* Used in ipv6_gro_receive() */ |
1652 | int proto; |
1653 | |
1654 | /* used in skb_gro_receive() slow path */ |
1655 | struct sk_buff *last; |
1656 | }; |
1657 | |
1658 | #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb) |
1659 | |
1660 | struct packet_type { |
1661 | __be16 type; /* This is really htons(ether_type). */ |
1662 | struct net_device *dev; /* NULL is wildcarded here */ |
1663 | int (*func) (struct sk_buff *, |
1664 | struct net_device *, |
1665 | struct packet_type *, |
1666 | struct net_device *); |
1667 | bool (*id_match)(struct packet_type *ptype, |
1668 | struct sock *sk); |
1669 | void *af_packet_priv; |
1670 | struct list_head list; |
1671 | }; |
1672 | |
1673 | struct offload_callbacks { |
1674 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
1675 | netdev_features_t features); |
1676 | int (*gso_send_check)(struct sk_buff *skb); |
1677 | struct sk_buff **(*gro_receive)(struct sk_buff **head, |
1678 | struct sk_buff *skb); |
1679 | int (*gro_complete)(struct sk_buff *skb); |
1680 | }; |
1681 | |
1682 | struct packet_offload { |
1683 | __be16 type; /* This is really htons(ether_type). */ |
1684 | struct offload_callbacks callbacks; |
1685 | struct list_head list; |
1686 | }; |
1687 | |
1688 | #include <linux/notifier.h> |
1689 | |
1690 | /* netdevice notifier chain. Please remember to update the rtnetlink |
1691 | * notification exclusion list in rtnetlink_event() when adding new |
1692 | * types. |
1693 | */ |
1694 | #define NETDEV_UP 0x0001 /* For now you can't veto a device up/down */ |
1695 | #define NETDEV_DOWN 0x0002 |
1696 | #define NETDEV_REBOOT 0x0003 /* Tell a protocol stack a network interface |
1697 | detected a hardware crash and restarted |
1698 | - we can use this eg to kick tcp sessions |
1699 | once done */ |
1700 | #define NETDEV_CHANGE 0x0004 /* Notify device state change */ |
1701 | #define NETDEV_REGISTER 0x0005 |
1702 | #define NETDEV_UNREGISTER 0x0006 |
1703 | #define NETDEV_CHANGEMTU 0x0007 |
1704 | #define NETDEV_CHANGEADDR 0x0008 |
1705 | #define NETDEV_GOING_DOWN 0x0009 |
1706 | #define NETDEV_CHANGENAME 0x000A |
1707 | #define NETDEV_FEAT_CHANGE 0x000B |
1708 | #define NETDEV_BONDING_FAILOVER 0x000C |
1709 | #define NETDEV_PRE_UP 0x000D |
1710 | #define NETDEV_PRE_TYPE_CHANGE 0x000E |
1711 | #define NETDEV_POST_TYPE_CHANGE 0x000F |
1712 | #define NETDEV_POST_INIT 0x0010 |
1713 | #define NETDEV_UNREGISTER_FINAL 0x0011 |
1714 | #define NETDEV_RELEASE 0x0012 |
1715 | #define NETDEV_NOTIFY_PEERS 0x0013 |
1716 | #define NETDEV_JOIN 0x0014 |
1717 | #define NETDEV_CHANGEUPPER 0x0015 |
1718 | #define NETDEV_RESEND_IGMP 0x0016 |
1719 | |
1720 | int register_netdevice_notifier(struct notifier_block *nb); |
1721 | int unregister_netdevice_notifier(struct notifier_block *nb); |
1722 | |
1723 | struct netdev_notifier_info { |
1724 | struct net_device *dev; |
1725 | }; |
1726 | |
1727 | struct netdev_notifier_change_info { |
1728 | struct netdev_notifier_info info; /* must be first */ |
1729 | unsigned int flags_changed; |
1730 | }; |
1731 | |
1732 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
1733 | struct net_device *dev) |
1734 | { |
1735 | info->dev = dev; |
1736 | } |
1737 | |
1738 | static inline struct net_device * |
1739 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) |
1740 | { |
1741 | return info->dev; |
1742 | } |
1743 | |
1744 | int call_netdevice_notifiers_info(unsigned long val, struct net_device *dev, |
1745 | struct netdev_notifier_info *info); |
1746 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
1747 | |
1748 | |
1749 | extern rwlock_t dev_base_lock; /* Device list lock */ |
1750 | |
1751 | #define for_each_netdev(net, d) \ |
1752 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) |
1753 | #define for_each_netdev_reverse(net, d) \ |
1754 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) |
1755 | #define for_each_netdev_rcu(net, d) \ |
1756 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) |
1757 | #define for_each_netdev_safe(net, d, n) \ |
1758 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) |
1759 | #define for_each_netdev_continue(net, d) \ |
1760 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) |
1761 | #define for_each_netdev_continue_rcu(net, d) \ |
1762 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) |
1763 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
1764 | for_each_netdev_rcu(&init_net, slave) \ |
1765 | if (netdev_master_upper_dev_get_rcu(slave) == bond) |
1766 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
1767 | |
1768 | static inline struct net_device *next_net_device(struct net_device *dev) |
1769 | { |
1770 | struct list_head *lh; |
1771 | struct net *net; |
1772 | |
1773 | net = dev_net(dev); |
1774 | lh = dev->dev_list.next; |
1775 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1776 | } |
1777 | |
1778 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
1779 | { |
1780 | struct list_head *lh; |
1781 | struct net *net; |
1782 | |
1783 | net = dev_net(dev); |
1784 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
1785 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1786 | } |
1787 | |
1788 | static inline struct net_device *first_net_device(struct net *net) |
1789 | { |
1790 | return list_empty(&net->dev_base_head) ? NULL : |
1791 | net_device_entry(net->dev_base_head.next); |
1792 | } |
1793 | |
1794 | static inline struct net_device *first_net_device_rcu(struct net *net) |
1795 | { |
1796 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); |
1797 | |
1798 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
1799 | } |
1800 | |
1801 | int netdev_boot_setup_check(struct net_device *dev); |
1802 | unsigned long netdev_boot_base(const char *prefix, int unit); |
1803 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
1804 | const char *hwaddr); |
1805 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
1806 | struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type); |
1807 | void dev_add_pack(struct packet_type *pt); |
1808 | void dev_remove_pack(struct packet_type *pt); |
1809 | void __dev_remove_pack(struct packet_type *pt); |
1810 | void dev_add_offload(struct packet_offload *po); |
1811 | void dev_remove_offload(struct packet_offload *po); |
1812 | void __dev_remove_offload(struct packet_offload *po); |
1813 | |
1814 | struct net_device *dev_get_by_flags_rcu(struct net *net, unsigned short flags, |
1815 | unsigned short mask); |
1816 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
1817 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
1818 | struct net_device *__dev_get_by_name(struct net *net, const char *name); |
1819 | int dev_alloc_name(struct net_device *dev, const char *name); |
1820 | int dev_open(struct net_device *dev); |
1821 | int dev_close(struct net_device *dev); |
1822 | void dev_disable_lro(struct net_device *dev); |
1823 | int dev_loopback_xmit(struct sk_buff *newskb); |
1824 | int dev_queue_xmit(struct sk_buff *skb); |
1825 | int dev_queue_xmit_accel(struct sk_buff *skb, void *accel_priv); |
1826 | int register_netdevice(struct net_device *dev); |
1827 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); |
1828 | void unregister_netdevice_many(struct list_head *head); |
1829 | static inline void unregister_netdevice(struct net_device *dev) |
1830 | { |
1831 | unregister_netdevice_queue(dev, NULL); |
1832 | } |
1833 | |
1834 | int netdev_refcnt_read(const struct net_device *dev); |
1835 | void free_netdev(struct net_device *dev); |
1836 | void netdev_freemem(struct net_device *dev); |
1837 | void synchronize_net(void); |
1838 | int init_dummy_netdev(struct net_device *dev); |
1839 | |
1840 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
1841 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
1842 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
1843 | int netdev_get_name(struct net *net, char *name, int ifindex); |
1844 | int dev_restart(struct net_device *dev); |
1845 | #ifdef CONFIG_NETPOLL_TRAP |
1846 | int netpoll_trap(void); |
1847 | #endif |
1848 | int skb_gro_receive(struct sk_buff **head, struct sk_buff *skb); |
1849 | |
1850 | static inline unsigned int skb_gro_offset(const struct sk_buff *skb) |
1851 | { |
1852 | return NAPI_GRO_CB(skb)->data_offset; |
1853 | } |
1854 | |
1855 | static inline unsigned int skb_gro_len(const struct sk_buff *skb) |
1856 | { |
1857 | return skb->len - NAPI_GRO_CB(skb)->data_offset; |
1858 | } |
1859 | |
1860 | static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len) |
1861 | { |
1862 | NAPI_GRO_CB(skb)->data_offset += len; |
1863 | } |
1864 | |
1865 | static inline void *skb_gro_header_fast(struct sk_buff *skb, |
1866 | unsigned int offset) |
1867 | { |
1868 | return NAPI_GRO_CB(skb)->frag0 + offset; |
1869 | } |
1870 | |
1871 | static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen) |
1872 | { |
1873 | return NAPI_GRO_CB(skb)->frag0_len < hlen; |
1874 | } |
1875 | |
1876 | static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen, |
1877 | unsigned int offset) |
1878 | { |
1879 | if (!pskb_may_pull(skb, hlen)) |
1880 | return NULL; |
1881 | |
1882 | NAPI_GRO_CB(skb)->frag0 = NULL; |
1883 | NAPI_GRO_CB(skb)->frag0_len = 0; |
1884 | return skb->data + offset; |
1885 | } |
1886 | |
1887 | static inline void *skb_gro_mac_header(struct sk_buff *skb) |
1888 | { |
1889 | return NAPI_GRO_CB(skb)->frag0 ?: skb_mac_header(skb); |
1890 | } |
1891 | |
1892 | static inline void *skb_gro_network_header(struct sk_buff *skb) |
1893 | { |
1894 | return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) + |
1895 | skb_network_offset(skb); |
1896 | } |
1897 | |
1898 | static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
1899 | unsigned short type, |
1900 | const void *daddr, const void *saddr, |
1901 | unsigned int len) |
1902 | { |
1903 | if (!dev->header_ops || !dev->header_ops->create) |
1904 | return 0; |
1905 | |
1906 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
1907 | } |
1908 | |
1909 | static inline int dev_parse_header(const struct sk_buff *skb, |
1910 | unsigned char *haddr) |
1911 | { |
1912 | const struct net_device *dev = skb->dev; |
1913 | |
1914 | if (!dev->header_ops || !dev->header_ops->parse) |
1915 | return 0; |
1916 | return dev->header_ops->parse(skb, haddr); |
1917 | } |
1918 | |
1919 | static inline int dev_rebuild_header(struct sk_buff *skb) |
1920 | { |
1921 | const struct net_device *dev = skb->dev; |
1922 | |
1923 | if (!dev->header_ops || !dev->header_ops->rebuild) |
1924 | return 0; |
1925 | return dev->header_ops->rebuild(skb); |
1926 | } |
1927 | |
1928 | typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr, int len); |
1929 | int register_gifconf(unsigned int family, gifconf_func_t *gifconf); |
1930 | static inline int unregister_gifconf(unsigned int family) |
1931 | { |
1932 | return register_gifconf(family, NULL); |
1933 | } |
1934 | |
1935 | #ifdef CONFIG_NET_FLOW_LIMIT |
1936 | #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */ |
1937 | struct sd_flow_limit { |
1938 | u64 count; |
1939 | unsigned int num_buckets; |
1940 | unsigned int history_head; |
1941 | u16 history[FLOW_LIMIT_HISTORY]; |
1942 | u8 buckets[]; |
1943 | }; |
1944 | |
1945 | extern int netdev_flow_limit_table_len; |
1946 | #endif /* CONFIG_NET_FLOW_LIMIT */ |
1947 | |
1948 | /* |
1949 | * Incoming packets are placed on per-cpu queues |
1950 | */ |
1951 | struct softnet_data { |
1952 | struct Qdisc *output_queue; |
1953 | struct Qdisc **output_queue_tailp; |
1954 | struct list_head poll_list; |
1955 | struct sk_buff *completion_queue; |
1956 | struct sk_buff_head process_queue; |
1957 | |
1958 | /* stats */ |
1959 | unsigned int processed; |
1960 | unsigned int time_squeeze; |
1961 | unsigned int cpu_collision; |
1962 | unsigned int received_rps; |
1963 | |
1964 | #ifdef CONFIG_RPS |
1965 | struct softnet_data *rps_ipi_list; |
1966 | |
1967 | /* Elements below can be accessed between CPUs for RPS */ |
1968 | struct call_single_data csd ____cacheline_aligned_in_smp; |
1969 | struct softnet_data *rps_ipi_next; |
1970 | unsigned int cpu; |
1971 | unsigned int input_queue_head; |
1972 | unsigned int input_queue_tail; |
1973 | #endif |
1974 | unsigned int dropped; |
1975 | struct sk_buff_head input_pkt_queue; |
1976 | struct napi_struct backlog; |
1977 | |
1978 | #ifdef CONFIG_NET_FLOW_LIMIT |
1979 | struct sd_flow_limit __rcu *flow_limit; |
1980 | #endif |
1981 | }; |
1982 | |
1983 | static inline void input_queue_head_incr(struct softnet_data *sd) |
1984 | { |
1985 | #ifdef CONFIG_RPS |
1986 | sd->input_queue_head++; |
1987 | #endif |
1988 | } |
1989 | |
1990 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, |
1991 | unsigned int *qtail) |
1992 | { |
1993 | #ifdef CONFIG_RPS |
1994 | *qtail = ++sd->input_queue_tail; |
1995 | #endif |
1996 | } |
1997 | |
1998 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
1999 | |
2000 | void __netif_schedule(struct Qdisc *q); |
2001 | |
2002 | static inline void netif_schedule_queue(struct netdev_queue *txq) |
2003 | { |
2004 | if (!(txq->state & QUEUE_STATE_ANY_XOFF)) |
2005 | __netif_schedule(txq->qdisc); |
2006 | } |
2007 | |
2008 | static inline void netif_tx_schedule_all(struct net_device *dev) |
2009 | { |
2010 | unsigned int i; |
2011 | |
2012 | for (i = 0; i < dev->num_tx_queues; i++) |
2013 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
2014 | } |
2015 | |
2016 | static inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
2017 | { |
2018 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
2019 | } |
2020 | |
2021 | /** |
2022 | * netif_start_queue - allow transmit |
2023 | * @dev: network device |
2024 | * |
2025 | * Allow upper layers to call the device hard_start_xmit routine. |
2026 | */ |
2027 | static inline void netif_start_queue(struct net_device *dev) |
2028 | { |
2029 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
2030 | } |
2031 | |
2032 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
2033 | { |
2034 | unsigned int i; |
2035 | |
2036 | for (i = 0; i < dev->num_tx_queues; i++) { |
2037 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2038 | netif_tx_start_queue(txq); |
2039 | } |
2040 | } |
2041 | |
2042 | static inline void netif_tx_wake_queue(struct netdev_queue *dev_queue) |
2043 | { |
2044 | #ifdef CONFIG_NETPOLL_TRAP |
2045 | if (netpoll_trap()) { |
2046 | netif_tx_start_queue(dev_queue); |
2047 | return; |
2048 | } |
2049 | #endif |
2050 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) |
2051 | __netif_schedule(dev_queue->qdisc); |
2052 | } |
2053 | |
2054 | /** |
2055 | * netif_wake_queue - restart transmit |
2056 | * @dev: network device |
2057 | * |
2058 | * Allow upper layers to call the device hard_start_xmit routine. |
2059 | * Used for flow control when transmit resources are available. |
2060 | */ |
2061 | static inline void netif_wake_queue(struct net_device *dev) |
2062 | { |
2063 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
2064 | } |
2065 | |
2066 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
2067 | { |
2068 | unsigned int i; |
2069 | |
2070 | for (i = 0; i < dev->num_tx_queues; i++) { |
2071 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2072 | netif_tx_wake_queue(txq); |
2073 | } |
2074 | } |
2075 | |
2076 | static inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
2077 | { |
2078 | if (WARN_ON(!dev_queue)) { |
2079 | pr_info("netif_stop_queue() cannot be called before register_netdev()\n"); |
2080 | return; |
2081 | } |
2082 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
2083 | } |
2084 | |
2085 | /** |
2086 | * netif_stop_queue - stop transmitted packets |
2087 | * @dev: network device |
2088 | * |
2089 | * Stop upper layers calling the device hard_start_xmit routine. |
2090 | * Used for flow control when transmit resources are unavailable. |
2091 | */ |
2092 | static inline void netif_stop_queue(struct net_device *dev) |
2093 | { |
2094 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
2095 | } |
2096 | |
2097 | static inline void netif_tx_stop_all_queues(struct net_device *dev) |
2098 | { |
2099 | unsigned int i; |
2100 | |
2101 | for (i = 0; i < dev->num_tx_queues; i++) { |
2102 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2103 | netif_tx_stop_queue(txq); |
2104 | } |
2105 | } |
2106 | |
2107 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
2108 | { |
2109 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
2110 | } |
2111 | |
2112 | /** |
2113 | * netif_queue_stopped - test if transmit queue is flowblocked |
2114 | * @dev: network device |
2115 | * |
2116 | * Test if transmit queue on device is currently unable to send. |
2117 | */ |
2118 | static inline bool netif_queue_stopped(const struct net_device *dev) |
2119 | { |
2120 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
2121 | } |
2122 | |
2123 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
2124 | { |
2125 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
2126 | } |
2127 | |
2128 | static inline bool netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
2129 | { |
2130 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
2131 | } |
2132 | |
2133 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
2134 | unsigned int bytes) |
2135 | { |
2136 | #ifdef CONFIG_BQL |
2137 | dql_queued(&dev_queue->dql, bytes); |
2138 | |
2139 | if (likely(dql_avail(&dev_queue->dql) >= 0)) |
2140 | return; |
2141 | |
2142 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
2143 | |
2144 | /* |
2145 | * The XOFF flag must be set before checking the dql_avail below, |
2146 | * because in netdev_tx_completed_queue we update the dql_completed |
2147 | * before checking the XOFF flag. |
2148 | */ |
2149 | smp_mb(); |
2150 | |
2151 | /* check again in case another CPU has just made room avail */ |
2152 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) |
2153 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
2154 | #endif |
2155 | } |
2156 | |
2157 | /** |
2158 | * netdev_sent_queue - report the number of bytes queued to hardware |
2159 | * @dev: network device |
2160 | * @bytes: number of bytes queued to the hardware device queue |
2161 | * |
2162 | * Report the number of bytes queued for sending/completion to the network |
2163 | * device hardware queue. @bytes should be a good approximation and should |
2164 | * exactly match netdev_completed_queue() @bytes |
2165 | */ |
2166 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
2167 | { |
2168 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); |
2169 | } |
2170 | |
2171 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, |
2172 | unsigned int pkts, unsigned int bytes) |
2173 | { |
2174 | #ifdef CONFIG_BQL |
2175 | if (unlikely(!bytes)) |
2176 | return; |
2177 | |
2178 | dql_completed(&dev_queue->dql, bytes); |
2179 | |
2180 | /* |
2181 | * Without the memory barrier there is a small possiblity that |
2182 | * netdev_tx_sent_queue will miss the update and cause the queue to |
2183 | * be stopped forever |
2184 | */ |
2185 | smp_mb(); |
2186 | |
2187 | if (dql_avail(&dev_queue->dql) < 0) |
2188 | return; |
2189 | |
2190 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) |
2191 | netif_schedule_queue(dev_queue); |
2192 | #endif |
2193 | } |
2194 | |
2195 | /** |
2196 | * netdev_completed_queue - report bytes and packets completed by device |
2197 | * @dev: network device |
2198 | * @pkts: actual number of packets sent over the medium |
2199 | * @bytes: actual number of bytes sent over the medium |
2200 | * |
2201 | * Report the number of bytes and packets transmitted by the network device |
2202 | * hardware queue over the physical medium, @bytes must exactly match the |
2203 | * @bytes amount passed to netdev_sent_queue() |
2204 | */ |
2205 | static inline void netdev_completed_queue(struct net_device *dev, |
2206 | unsigned int pkts, unsigned int bytes) |
2207 | { |
2208 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); |
2209 | } |
2210 | |
2211 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) |
2212 | { |
2213 | #ifdef CONFIG_BQL |
2214 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
2215 | dql_reset(&q->dql); |
2216 | #endif |
2217 | } |
2218 | |
2219 | /** |
2220 | * netdev_reset_queue - reset the packets and bytes count of a network device |
2221 | * @dev_queue: network device |
2222 | * |
2223 | * Reset the bytes and packet count of a network device and clear the |
2224 | * software flow control OFF bit for this network device |
2225 | */ |
2226 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
2227 | { |
2228 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); |
2229 | } |
2230 | |
2231 | /** |
2232 | * netif_running - test if up |
2233 | * @dev: network device |
2234 | * |
2235 | * Test if the device has been brought up. |
2236 | */ |
2237 | static inline bool netif_running(const struct net_device *dev) |
2238 | { |
2239 | return test_bit(__LINK_STATE_START, &dev->state); |
2240 | } |
2241 | |
2242 | /* |
2243 | * Routines to manage the subqueues on a device. We only need start |
2244 | * stop, and a check if it's stopped. All other device management is |
2245 | * done at the overall netdevice level. |
2246 | * Also test the device if we're multiqueue. |
2247 | */ |
2248 | |
2249 | /** |
2250 | * netif_start_subqueue - allow sending packets on subqueue |
2251 | * @dev: network device |
2252 | * @queue_index: sub queue index |
2253 | * |
2254 | * Start individual transmit queue of a device with multiple transmit queues. |
2255 | */ |
2256 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
2257 | { |
2258 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
2259 | |
2260 | netif_tx_start_queue(txq); |
2261 | } |
2262 | |
2263 | /** |
2264 | * netif_stop_subqueue - stop sending packets on subqueue |
2265 | * @dev: network device |
2266 | * @queue_index: sub queue index |
2267 | * |
2268 | * Stop individual transmit queue of a device with multiple transmit queues. |
2269 | */ |
2270 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
2271 | { |
2272 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
2273 | #ifdef CONFIG_NETPOLL_TRAP |
2274 | if (netpoll_trap()) |
2275 | return; |
2276 | #endif |
2277 | netif_tx_stop_queue(txq); |
2278 | } |
2279 | |
2280 | /** |
2281 | * netif_subqueue_stopped - test status of subqueue |
2282 | * @dev: network device |
2283 | * @queue_index: sub queue index |
2284 | * |
2285 | * Check individual transmit queue of a device with multiple transmit queues. |
2286 | */ |
2287 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
2288 | u16 queue_index) |
2289 | { |
2290 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
2291 | |
2292 | return netif_tx_queue_stopped(txq); |
2293 | } |
2294 | |
2295 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
2296 | struct sk_buff *skb) |
2297 | { |
2298 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); |
2299 | } |
2300 | |
2301 | /** |
2302 | * netif_wake_subqueue - allow sending packets on subqueue |
2303 | * @dev: network device |
2304 | * @queue_index: sub queue index |
2305 | * |
2306 | * Resume individual transmit queue of a device with multiple transmit queues. |
2307 | */ |
2308 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
2309 | { |
2310 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
2311 | #ifdef CONFIG_NETPOLL_TRAP |
2312 | if (netpoll_trap()) |
2313 | return; |
2314 | #endif |
2315 | if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &txq->state)) |
2316 | __netif_schedule(txq->qdisc); |
2317 | } |
2318 | |
2319 | #ifdef CONFIG_XPS |
2320 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
2321 | u16 index); |
2322 | #else |
2323 | static inline int netif_set_xps_queue(struct net_device *dev, |
2324 | const struct cpumask *mask, |
2325 | u16 index) |
2326 | { |
2327 | return 0; |
2328 | } |
2329 | #endif |
2330 | |
2331 | /* |
2332 | * Returns a Tx hash for the given packet when dev->real_num_tx_queues is used |
2333 | * as a distribution range limit for the returned value. |
2334 | */ |
2335 | static inline u16 skb_tx_hash(const struct net_device *dev, |
2336 | const struct sk_buff *skb) |
2337 | { |
2338 | return __skb_tx_hash(dev, skb, dev->real_num_tx_queues); |
2339 | } |
2340 | |
2341 | /** |
2342 | * netif_is_multiqueue - test if device has multiple transmit queues |
2343 | * @dev: network device |
2344 | * |
2345 | * Check if device has multiple transmit queues |
2346 | */ |
2347 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
2348 | { |
2349 | return dev->num_tx_queues > 1; |
2350 | } |
2351 | |
2352 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
2353 | |
2354 | #ifdef CONFIG_RPS |
2355 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
2356 | #else |
2357 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, |
2358 | unsigned int rxq) |
2359 | { |
2360 | return 0; |
2361 | } |
2362 | #endif |
2363 | |
2364 | static inline int netif_copy_real_num_queues(struct net_device *to_dev, |
2365 | const struct net_device *from_dev) |
2366 | { |
2367 | int err; |
2368 | |
2369 | err = netif_set_real_num_tx_queues(to_dev, |
2370 | from_dev->real_num_tx_queues); |
2371 | if (err) |
2372 | return err; |
2373 | #ifdef CONFIG_RPS |
2374 | return netif_set_real_num_rx_queues(to_dev, |
2375 | from_dev->real_num_rx_queues); |
2376 | #else |
2377 | return 0; |
2378 | #endif |
2379 | } |
2380 | |
2381 | #define DEFAULT_MAX_NUM_RSS_QUEUES (8) |
2382 | int netif_get_num_default_rss_queues(void); |
2383 | |
2384 | /* Use this variant when it is known for sure that it |
2385 | * is executing from hardware interrupt context or with hardware interrupts |
2386 | * disabled. |
2387 | */ |
2388 | void dev_kfree_skb_irq(struct sk_buff *skb); |
2389 | |
2390 | /* Use this variant in places where it could be invoked |
2391 | * from either hardware interrupt or other context, with hardware interrupts |
2392 | * either disabled or enabled. |
2393 | */ |
2394 | void dev_kfree_skb_any(struct sk_buff *skb); |
2395 | |
2396 | int netif_rx(struct sk_buff *skb); |
2397 | int netif_rx_ni(struct sk_buff *skb); |
2398 | int netif_receive_skb(struct sk_buff *skb); |
2399 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
2400 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); |
2401 | struct sk_buff *napi_get_frags(struct napi_struct *napi); |
2402 | gro_result_t napi_gro_frags(struct napi_struct *napi); |
2403 | |
2404 | static inline void napi_free_frags(struct napi_struct *napi) |
2405 | { |
2406 | kfree_skb(napi->skb); |
2407 | napi->skb = NULL; |
2408 | } |
2409 | |
2410 | int netdev_rx_handler_register(struct net_device *dev, |
2411 | rx_handler_func_t *rx_handler, |
2412 | void *rx_handler_data); |
2413 | void netdev_rx_handler_unregister(struct net_device *dev); |
2414 | |
2415 | bool dev_valid_name(const char *name); |
2416 | int dev_ioctl(struct net *net, unsigned int cmd, void __user *); |
2417 | int dev_ethtool(struct net *net, struct ifreq *); |
2418 | unsigned int dev_get_flags(const struct net_device *); |
2419 | int __dev_change_flags(struct net_device *, unsigned int flags); |
2420 | int dev_change_flags(struct net_device *, unsigned int); |
2421 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
2422 | unsigned int gchanges); |
2423 | int dev_change_name(struct net_device *, const char *); |
2424 | int dev_set_alias(struct net_device *, const char *, size_t); |
2425 | int dev_change_net_namespace(struct net_device *, struct net *, const char *); |
2426 | int dev_set_mtu(struct net_device *, int); |
2427 | void dev_set_group(struct net_device *, int); |
2428 | int dev_set_mac_address(struct net_device *, struct sockaddr *); |
2429 | int dev_change_carrier(struct net_device *, bool new_carrier); |
2430 | int dev_get_phys_port_id(struct net_device *dev, |
2431 | struct netdev_phys_port_id *ppid); |
2432 | int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
2433 | struct netdev_queue *txq); |
2434 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
2435 | |
2436 | extern int netdev_budget; |
2437 | |
2438 | /* Called by rtnetlink.c:rtnl_unlock() */ |
2439 | void netdev_run_todo(void); |
2440 | |
2441 | /** |
2442 | * dev_put - release reference to device |
2443 | * @dev: network device |
2444 | * |
2445 | * Release reference to device to allow it to be freed. |
2446 | */ |
2447 | static inline void dev_put(struct net_device *dev) |
2448 | { |
2449 | this_cpu_dec(*dev->pcpu_refcnt); |
2450 | } |
2451 | |
2452 | /** |
2453 | * dev_hold - get reference to device |
2454 | * @dev: network device |
2455 | * |
2456 | * Hold reference to device to keep it from being freed. |
2457 | */ |
2458 | static inline void dev_hold(struct net_device *dev) |
2459 | { |
2460 | this_cpu_inc(*dev->pcpu_refcnt); |
2461 | } |
2462 | |
2463 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
2464 | * and _off may be called from IRQ context, but it is caller |
2465 | * who is responsible for serialization of these calls. |
2466 | * |
2467 | * The name carrier is inappropriate, these functions should really be |
2468 | * called netif_lowerlayer_*() because they represent the state of any |
2469 | * kind of lower layer not just hardware media. |
2470 | */ |
2471 | |
2472 | void linkwatch_init_dev(struct net_device *dev); |
2473 | void linkwatch_fire_event(struct net_device *dev); |
2474 | void linkwatch_forget_dev(struct net_device *dev); |
2475 | |
2476 | /** |
2477 | * netif_carrier_ok - test if carrier present |
2478 | * @dev: network device |
2479 | * |
2480 | * Check if carrier is present on device |
2481 | */ |
2482 | static inline bool netif_carrier_ok(const struct net_device *dev) |
2483 | { |
2484 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
2485 | } |
2486 | |
2487 | unsigned long dev_trans_start(struct net_device *dev); |
2488 | |
2489 | void __netdev_watchdog_up(struct net_device *dev); |
2490 | |
2491 | void netif_carrier_on(struct net_device *dev); |
2492 | |
2493 | void netif_carrier_off(struct net_device *dev); |
2494 | |
2495 | /** |
2496 | * netif_dormant_on - mark device as dormant. |
2497 | * @dev: network device |
2498 | * |
2499 | * Mark device as dormant (as per RFC2863). |
2500 | * |
2501 | * The dormant state indicates that the relevant interface is not |
2502 | * actually in a condition to pass packets (i.e., it is not 'up') but is |
2503 | * in a "pending" state, waiting for some external event. For "on- |
2504 | * demand" interfaces, this new state identifies the situation where the |
2505 | * interface is waiting for events to place it in the up state. |
2506 | * |
2507 | */ |
2508 | static inline void netif_dormant_on(struct net_device *dev) |
2509 | { |
2510 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
2511 | linkwatch_fire_event(dev); |
2512 | } |
2513 | |
2514 | /** |
2515 | * netif_dormant_off - set device as not dormant. |
2516 | * @dev: network device |
2517 | * |
2518 | * Device is not in dormant state. |
2519 | */ |
2520 | static inline void netif_dormant_off(struct net_device *dev) |
2521 | { |
2522 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
2523 | linkwatch_fire_event(dev); |
2524 | } |
2525 | |
2526 | /** |
2527 | * netif_dormant - test if carrier present |
2528 | * @dev: network device |
2529 | * |
2530 | * Check if carrier is present on device |
2531 | */ |
2532 | static inline bool netif_dormant(const struct net_device *dev) |
2533 | { |
2534 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
2535 | } |
2536 | |
2537 | |
2538 | /** |
2539 | * netif_oper_up - test if device is operational |
2540 | * @dev: network device |
2541 | * |
2542 | * Check if carrier is operational |
2543 | */ |
2544 | static inline bool netif_oper_up(const struct net_device *dev) |
2545 | { |
2546 | return (dev->operstate == IF_OPER_UP || |
2547 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
2548 | } |
2549 | |
2550 | /** |
2551 | * netif_device_present - is device available or removed |
2552 | * @dev: network device |
2553 | * |
2554 | * Check if device has not been removed from system. |
2555 | */ |
2556 | static inline bool netif_device_present(struct net_device *dev) |
2557 | { |
2558 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
2559 | } |
2560 | |
2561 | void netif_device_detach(struct net_device *dev); |
2562 | |
2563 | void netif_device_attach(struct net_device *dev); |
2564 | |
2565 | /* |
2566 | * Network interface message level settings |
2567 | */ |
2568 | |
2569 | enum { |
2570 | NETIF_MSG_DRV = 0x0001, |
2571 | NETIF_MSG_PROBE = 0x0002, |
2572 | NETIF_MSG_LINK = 0x0004, |
2573 | NETIF_MSG_TIMER = 0x0008, |
2574 | NETIF_MSG_IFDOWN = 0x0010, |
2575 | NETIF_MSG_IFUP = 0x0020, |
2576 | NETIF_MSG_RX_ERR = 0x0040, |
2577 | NETIF_MSG_TX_ERR = 0x0080, |
2578 | NETIF_MSG_TX_QUEUED = 0x0100, |
2579 | NETIF_MSG_INTR = 0x0200, |
2580 | NETIF_MSG_TX_DONE = 0x0400, |
2581 | NETIF_MSG_RX_STATUS = 0x0800, |
2582 | NETIF_MSG_PKTDATA = 0x1000, |
2583 | NETIF_MSG_HW = 0x2000, |
2584 | NETIF_MSG_WOL = 0x4000, |
2585 | }; |
2586 | |
2587 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
2588 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
2589 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
2590 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
2591 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
2592 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
2593 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
2594 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
2595 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
2596 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
2597 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
2598 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
2599 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
2600 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
2601 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
2602 | |
2603 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
2604 | { |
2605 | /* use default */ |
2606 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
2607 | return default_msg_enable_bits; |
2608 | if (debug_value == 0) /* no output */ |
2609 | return 0; |
2610 | /* set low N bits */ |
2611 | return (1 << debug_value) - 1; |
2612 | } |
2613 | |
2614 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
2615 | { |
2616 | spin_lock(&txq->_xmit_lock); |
2617 | txq->xmit_lock_owner = cpu; |
2618 | } |
2619 | |
2620 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
2621 | { |
2622 | spin_lock_bh(&txq->_xmit_lock); |
2623 | txq->xmit_lock_owner = smp_processor_id(); |
2624 | } |
2625 | |
2626 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
2627 | { |
2628 | bool ok = spin_trylock(&txq->_xmit_lock); |
2629 | if (likely(ok)) |
2630 | txq->xmit_lock_owner = smp_processor_id(); |
2631 | return ok; |
2632 | } |
2633 | |
2634 | static inline void __netif_tx_unlock(struct netdev_queue *txq) |
2635 | { |
2636 | txq->xmit_lock_owner = -1; |
2637 | spin_unlock(&txq->_xmit_lock); |
2638 | } |
2639 | |
2640 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) |
2641 | { |
2642 | txq->xmit_lock_owner = -1; |
2643 | spin_unlock_bh(&txq->_xmit_lock); |
2644 | } |
2645 | |
2646 | static inline void txq_trans_update(struct netdev_queue *txq) |
2647 | { |
2648 | if (txq->xmit_lock_owner != -1) |
2649 | txq->trans_start = jiffies; |
2650 | } |
2651 | |
2652 | /** |
2653 | * netif_tx_lock - grab network device transmit lock |
2654 | * @dev: network device |
2655 | * |
2656 | * Get network device transmit lock |
2657 | */ |
2658 | static inline void netif_tx_lock(struct net_device *dev) |
2659 | { |
2660 | unsigned int i; |
2661 | int cpu; |
2662 | |
2663 | spin_lock(&dev->tx_global_lock); |
2664 | cpu = smp_processor_id(); |
2665 | for (i = 0; i < dev->num_tx_queues; i++) { |
2666 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2667 | |
2668 | /* We are the only thread of execution doing a |
2669 | * freeze, but we have to grab the _xmit_lock in |
2670 | * order to synchronize with threads which are in |
2671 | * the ->hard_start_xmit() handler and already |
2672 | * checked the frozen bit. |
2673 | */ |
2674 | __netif_tx_lock(txq, cpu); |
2675 | set_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2676 | __netif_tx_unlock(txq); |
2677 | } |
2678 | } |
2679 | |
2680 | static inline void netif_tx_lock_bh(struct net_device *dev) |
2681 | { |
2682 | local_bh_disable(); |
2683 | netif_tx_lock(dev); |
2684 | } |
2685 | |
2686 | static inline void netif_tx_unlock(struct net_device *dev) |
2687 | { |
2688 | unsigned int i; |
2689 | |
2690 | for (i = 0; i < dev->num_tx_queues; i++) { |
2691 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2692 | |
2693 | /* No need to grab the _xmit_lock here. If the |
2694 | * queue is not stopped for another reason, we |
2695 | * force a schedule. |
2696 | */ |
2697 | clear_bit(__QUEUE_STATE_FROZEN, &txq->state); |
2698 | netif_schedule_queue(txq); |
2699 | } |
2700 | spin_unlock(&dev->tx_global_lock); |
2701 | } |
2702 | |
2703 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
2704 | { |
2705 | netif_tx_unlock(dev); |
2706 | local_bh_enable(); |
2707 | } |
2708 | |
2709 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
2710 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
2711 | __netif_tx_lock(txq, cpu); \ |
2712 | } \ |
2713 | } |
2714 | |
2715 | #define HARD_TX_UNLOCK(dev, txq) { \ |
2716 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
2717 | __netif_tx_unlock(txq); \ |
2718 | } \ |
2719 | } |
2720 | |
2721 | static inline void netif_tx_disable(struct net_device *dev) |
2722 | { |
2723 | unsigned int i; |
2724 | int cpu; |
2725 | |
2726 | local_bh_disable(); |
2727 | cpu = smp_processor_id(); |
2728 | for (i = 0; i < dev->num_tx_queues; i++) { |
2729 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
2730 | |
2731 | __netif_tx_lock(txq, cpu); |
2732 | netif_tx_stop_queue(txq); |
2733 | __netif_tx_unlock(txq); |
2734 | } |
2735 | local_bh_enable(); |
2736 | } |
2737 | |
2738 | static inline void netif_addr_lock(struct net_device *dev) |
2739 | { |
2740 | spin_lock(&dev->addr_list_lock); |
2741 | } |
2742 | |
2743 | static inline void netif_addr_lock_nested(struct net_device *dev) |
2744 | { |
2745 | spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); |
2746 | } |
2747 | |
2748 | static inline void netif_addr_lock_bh(struct net_device *dev) |
2749 | { |
2750 | spin_lock_bh(&dev->addr_list_lock); |
2751 | } |
2752 | |
2753 | static inline void netif_addr_unlock(struct net_device *dev) |
2754 | { |
2755 | spin_unlock(&dev->addr_list_lock); |
2756 | } |
2757 | |
2758 | static inline void netif_addr_unlock_bh(struct net_device *dev) |
2759 | { |
2760 | spin_unlock_bh(&dev->addr_list_lock); |
2761 | } |
2762 | |
2763 | /* |
2764 | * dev_addrs walker. Should be used only for read access. Call with |
2765 | * rcu_read_lock held. |
2766 | */ |
2767 | #define for_each_dev_addr(dev, ha) \ |
2768 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
2769 | |
2770 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
2771 | |
2772 | void ether_setup(struct net_device *dev); |
2773 | |
2774 | /* Support for loadable net-drivers */ |
2775 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
2776 | void (*setup)(struct net_device *), |
2777 | unsigned int txqs, unsigned int rxqs); |
2778 | #define alloc_netdev(sizeof_priv, name, setup) \ |
2779 | alloc_netdev_mqs(sizeof_priv, name, setup, 1, 1) |
2780 | |
2781 | #define alloc_netdev_mq(sizeof_priv, name, setup, count) \ |
2782 | alloc_netdev_mqs(sizeof_priv, name, setup, count, count) |
2783 | |
2784 | int register_netdev(struct net_device *dev); |
2785 | void unregister_netdev(struct net_device *dev); |
2786 | |
2787 | /* General hardware address lists handling functions */ |
2788 | int __hw_addr_add_multiple(struct netdev_hw_addr_list *to_list, |
2789 | struct netdev_hw_addr_list *from_list, |
2790 | int addr_len, unsigned char addr_type); |
2791 | void __hw_addr_del_multiple(struct netdev_hw_addr_list *to_list, |
2792 | struct netdev_hw_addr_list *from_list, |
2793 | int addr_len, unsigned char addr_type); |
2794 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
2795 | struct netdev_hw_addr_list *from_list, int addr_len); |
2796 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
2797 | struct netdev_hw_addr_list *from_list, int addr_len); |
2798 | void __hw_addr_flush(struct netdev_hw_addr_list *list); |
2799 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
2800 | |
2801 | /* Functions used for device addresses handling */ |
2802 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
2803 | unsigned char addr_type); |
2804 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
2805 | unsigned char addr_type); |
2806 | int dev_addr_add_multiple(struct net_device *to_dev, |
2807 | struct net_device *from_dev, unsigned char addr_type); |
2808 | int dev_addr_del_multiple(struct net_device *to_dev, |
2809 | struct net_device *from_dev, unsigned char addr_type); |
2810 | void dev_addr_flush(struct net_device *dev); |
2811 | int dev_addr_init(struct net_device *dev); |
2812 | |
2813 | /* Functions used for unicast addresses handling */ |
2814 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
2815 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); |
2816 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); |
2817 | int dev_uc_sync(struct net_device *to, struct net_device *from); |
2818 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); |
2819 | void dev_uc_unsync(struct net_device *to, struct net_device *from); |
2820 | void dev_uc_flush(struct net_device *dev); |
2821 | void dev_uc_init(struct net_device *dev); |
2822 | |
2823 | /* Functions used for multicast addresses handling */ |
2824 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
2825 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); |
2826 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); |
2827 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); |
2828 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); |
2829 | int dev_mc_sync(struct net_device *to, struct net_device *from); |
2830 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); |
2831 | void dev_mc_unsync(struct net_device *to, struct net_device *from); |
2832 | void dev_mc_flush(struct net_device *dev); |
2833 | void dev_mc_init(struct net_device *dev); |
2834 | |
2835 | /* Functions used for secondary unicast and multicast support */ |
2836 | void dev_set_rx_mode(struct net_device *dev); |
2837 | void __dev_set_rx_mode(struct net_device *dev); |
2838 | int dev_set_promiscuity(struct net_device *dev, int inc); |
2839 | int dev_set_allmulti(struct net_device *dev, int inc); |
2840 | void netdev_state_change(struct net_device *dev); |
2841 | void netdev_notify_peers(struct net_device *dev); |
2842 | void netdev_features_change(struct net_device *dev); |
2843 | /* Load a device via the kmod */ |
2844 | void dev_load(struct net *net, const char *name); |
2845 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
2846 | struct rtnl_link_stats64 *storage); |
2847 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
2848 | const struct net_device_stats *netdev_stats); |
2849 | |
2850 | extern int netdev_max_backlog; |
2851 | extern int netdev_tstamp_prequeue; |
2852 | extern int weight_p; |
2853 | extern int bpf_jit_enable; |
2854 | |
2855 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
2856 | bool netdev_has_any_upper_dev(struct net_device *dev); |
2857 | struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev, |
2858 | struct list_head **iter); |
2859 | |
2860 | /* iterate through upper list, must be called under RCU read lock */ |
2861 | #define netdev_for_each_all_upper_dev_rcu(dev, updev, iter) \ |
2862 | for (iter = &(dev)->all_adj_list.upper, \ |
2863 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter)); \ |
2864 | updev; \ |
2865 | updev = netdev_all_upper_get_next_dev_rcu(dev, &(iter))) |
2866 | |
2867 | void *netdev_lower_get_next_private(struct net_device *dev, |
2868 | struct list_head **iter); |
2869 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, |
2870 | struct list_head **iter); |
2871 | |
2872 | #define netdev_for_each_lower_private(dev, priv, iter) \ |
2873 | for (iter = (dev)->adj_list.lower.next, \ |
2874 | priv = netdev_lower_get_next_private(dev, &(iter)); \ |
2875 | priv; \ |
2876 | priv = netdev_lower_get_next_private(dev, &(iter))) |
2877 | |
2878 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ |
2879 | for (iter = &(dev)->adj_list.lower, \ |
2880 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ |
2881 | priv; \ |
2882 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) |
2883 | |
2884 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
2885 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
2886 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); |
2887 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev); |
2888 | int netdev_master_upper_dev_link(struct net_device *dev, |
2889 | struct net_device *upper_dev); |
2890 | int netdev_master_upper_dev_link_private(struct net_device *dev, |
2891 | struct net_device *upper_dev, |
2892 | void *private); |
2893 | void netdev_upper_dev_unlink(struct net_device *dev, |
2894 | struct net_device *upper_dev); |
2895 | void *netdev_lower_dev_get_private_rcu(struct net_device *dev, |
2896 | struct net_device *lower_dev); |
2897 | void *netdev_lower_dev_get_private(struct net_device *dev, |
2898 | struct net_device *lower_dev); |
2899 | int skb_checksum_help(struct sk_buff *skb); |
2900 | struct sk_buff *__skb_gso_segment(struct sk_buff *skb, |
2901 | netdev_features_t features, bool tx_path); |
2902 | struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb, |
2903 | netdev_features_t features); |
2904 | |
2905 | static inline |
2906 | struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features) |
2907 | { |
2908 | return __skb_gso_segment(skb, features, true); |
2909 | } |
2910 | __be16 skb_network_protocol(struct sk_buff *skb); |
2911 | |
2912 | static inline bool can_checksum_protocol(netdev_features_t features, |
2913 | __be16 protocol) |
2914 | { |
2915 | return ((features & NETIF_F_GEN_CSUM) || |
2916 | ((features & NETIF_F_V4_CSUM) && |
2917 | protocol == htons(ETH_P_IP)) || |
2918 | ((features & NETIF_F_V6_CSUM) && |
2919 | protocol == htons(ETH_P_IPV6)) || |
2920 | ((features & NETIF_F_FCOE_CRC) && |
2921 | protocol == htons(ETH_P_FCOE))); |
2922 | } |
2923 | |
2924 | #ifdef CONFIG_BUG |
2925 | void netdev_rx_csum_fault(struct net_device *dev); |
2926 | #else |
2927 | static inline void netdev_rx_csum_fault(struct net_device *dev) |
2928 | { |
2929 | } |
2930 | #endif |
2931 | /* rx skb timestamps */ |
2932 | void net_enable_timestamp(void); |
2933 | void net_disable_timestamp(void); |
2934 | |
2935 | #ifdef CONFIG_PROC_FS |
2936 | int __init dev_proc_init(void); |
2937 | #else |
2938 | #define dev_proc_init() 0 |
2939 | #endif |
2940 | |
2941 | int netdev_class_create_file_ns(struct class_attribute *class_attr, |
2942 | const void *ns); |
2943 | void netdev_class_remove_file_ns(struct class_attribute *class_attr, |
2944 | const void *ns); |
2945 | |
2946 | static inline int netdev_class_create_file(struct class_attribute *class_attr) |
2947 | { |
2948 | return netdev_class_create_file_ns(class_attr, NULL); |
2949 | } |
2950 | |
2951 | static inline void netdev_class_remove_file(struct class_attribute *class_attr) |
2952 | { |
2953 | netdev_class_remove_file_ns(class_attr, NULL); |
2954 | } |
2955 | |
2956 | extern struct kobj_ns_type_operations net_ns_type_operations; |
2957 | |
2958 | const char *netdev_drivername(const struct net_device *dev); |
2959 | |
2960 | void linkwatch_run_queue(void); |
2961 | |
2962 | static inline netdev_features_t netdev_get_wanted_features( |
2963 | struct net_device *dev) |
2964 | { |
2965 | return (dev->features & ~dev->hw_features) | dev->wanted_features; |
2966 | } |
2967 | netdev_features_t netdev_increment_features(netdev_features_t all, |
2968 | netdev_features_t one, netdev_features_t mask); |
2969 | |
2970 | /* Allow TSO being used on stacked device : |
2971 | * Performing the GSO segmentation before last device |
2972 | * is a performance improvement. |
2973 | */ |
2974 | static inline netdev_features_t netdev_add_tso_features(netdev_features_t features, |
2975 | netdev_features_t mask) |
2976 | { |
2977 | return netdev_increment_features(features, NETIF_F_ALL_TSO, mask); |
2978 | } |
2979 | |
2980 | int __netdev_update_features(struct net_device *dev); |
2981 | void netdev_update_features(struct net_device *dev); |
2982 | void netdev_change_features(struct net_device *dev); |
2983 | |
2984 | void netif_stacked_transfer_operstate(const struct net_device *rootdev, |
2985 | struct net_device *dev); |
2986 | |
2987 | netdev_features_t netif_skb_features(struct sk_buff *skb); |
2988 | |
2989 | static inline bool net_gso_ok(netdev_features_t features, int gso_type) |
2990 | { |
2991 | netdev_features_t feature = gso_type << NETIF_F_GSO_SHIFT; |
2992 | |
2993 | /* check flags correspondence */ |
2994 | BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT)); |
2995 | BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_UFO >> NETIF_F_GSO_SHIFT)); |
2996 | BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT)); |
2997 | BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT)); |
2998 | BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT)); |
2999 | BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT)); |
3000 | |
3001 | return (features & feature) == feature; |
3002 | } |
3003 | |
3004 | static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features) |
3005 | { |
3006 | return net_gso_ok(features, skb_shinfo(skb)->gso_type) && |
3007 | (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST)); |
3008 | } |
3009 | |
3010 | static inline bool netif_needs_gso(struct sk_buff *skb, |
3011 | netdev_features_t features) |
3012 | { |
3013 | return skb_is_gso(skb) && (!skb_gso_ok(skb, features) || |
3014 | unlikely((skb->ip_summed != CHECKSUM_PARTIAL) && |
3015 | (skb->ip_summed != CHECKSUM_UNNECESSARY))); |
3016 | } |
3017 | |
3018 | static inline void netif_set_gso_max_size(struct net_device *dev, |
3019 | unsigned int size) |
3020 | { |
3021 | dev->gso_max_size = size; |
3022 | } |
3023 | |
3024 | static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, |
3025 | int pulled_hlen, u16 mac_offset, |
3026 | int mac_len) |
3027 | { |
3028 | skb->protocol = protocol; |
3029 | skb->encapsulation = 1; |
3030 | skb_push(skb, pulled_hlen); |
3031 | skb_reset_transport_header(skb); |
3032 | skb->mac_header = mac_offset; |
3033 | skb->network_header = skb->mac_header + mac_len; |
3034 | skb->mac_len = mac_len; |
3035 | } |
3036 | |
3037 | static inline bool netif_is_macvlan(struct net_device *dev) |
3038 | { |
3039 | return dev->priv_flags & IFF_MACVLAN; |
3040 | } |
3041 | |
3042 | static inline bool netif_is_bond_master(struct net_device *dev) |
3043 | { |
3044 | return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING; |
3045 | } |
3046 | |
3047 | static inline bool netif_is_bond_slave(struct net_device *dev) |
3048 | { |
3049 | return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING; |
3050 | } |
3051 | |
3052 | static inline bool netif_supports_nofcs(struct net_device *dev) |
3053 | { |
3054 | return dev->priv_flags & IFF_SUPP_NOFCS; |
3055 | } |
3056 | |
3057 | extern struct pernet_operations __net_initdata loopback_net_ops; |
3058 | |
3059 | /* Logging, debugging and troubleshooting/diagnostic helpers. */ |
3060 | |
3061 | /* netdev_printk helpers, similar to dev_printk */ |
3062 | |
3063 | static inline const char *netdev_name(const struct net_device *dev) |
3064 | { |
3065 | if (dev->reg_state != NETREG_REGISTERED) |
3066 | return "(unregistered net_device)"; |
3067 | return dev->name; |
3068 | } |
3069 | |
3070 | __printf(3, 4) |
3071 | int netdev_printk(const char *level, const struct net_device *dev, |
3072 | const char *format, ...); |
3073 | __printf(2, 3) |
3074 | int netdev_emerg(const struct net_device *dev, const char *format, ...); |
3075 | __printf(2, 3) |
3076 | int netdev_alert(const struct net_device *dev, const char *format, ...); |
3077 | __printf(2, 3) |
3078 | int netdev_crit(const struct net_device *dev, const char *format, ...); |
3079 | __printf(2, 3) |
3080 | int netdev_err(const struct net_device *dev, const char *format, ...); |
3081 | __printf(2, 3) |
3082 | int netdev_warn(const struct net_device *dev, const char *format, ...); |
3083 | __printf(2, 3) |
3084 | int netdev_notice(const struct net_device *dev, const char *format, ...); |
3085 | __printf(2, 3) |
3086 | int netdev_info(const struct net_device *dev, const char *format, ...); |
3087 | |
3088 | #define MODULE_ALIAS_NETDEV(device) \ |
3089 | MODULE_ALIAS("netdev-" device) |
3090 | |
3091 | #if defined(CONFIG_DYNAMIC_DEBUG) |
3092 | #define netdev_dbg(__dev, format, args...) \ |
3093 | do { \ |
3094 | dynamic_netdev_dbg(__dev, format, ##args); \ |
3095 | } while (0) |
3096 | #elif defined(DEBUG) |
3097 | #define netdev_dbg(__dev, format, args...) \ |
3098 | netdev_printk(KERN_DEBUG, __dev, format, ##args) |
3099 | #else |
3100 | #define netdev_dbg(__dev, format, args...) \ |
3101 | ({ \ |
3102 | if (0) \ |
3103 | netdev_printk(KERN_DEBUG, __dev, format, ##args); \ |
3104 | 0; \ |
3105 | }) |
3106 | #endif |
3107 | |
3108 | #if defined(VERBOSE_DEBUG) |
3109 | #define netdev_vdbg netdev_dbg |
3110 | #else |
3111 | |
3112 | #define netdev_vdbg(dev, format, args...) \ |
3113 | ({ \ |
3114 | if (0) \ |
3115 | netdev_printk(KERN_DEBUG, dev, format, ##args); \ |
3116 | 0; \ |
3117 | }) |
3118 | #endif |
3119 | |
3120 | /* |
3121 | * netdev_WARN() acts like dev_printk(), but with the key difference |
3122 | * of using a WARN/WARN_ON to get the message out, including the |
3123 | * file/line information and a backtrace. |
3124 | */ |
3125 | #define netdev_WARN(dev, format, args...) \ |
3126 | WARN(1, "netdevice: %s\n" format, netdev_name(dev), ##args) |
3127 | |
3128 | /* netif printk helpers, similar to netdev_printk */ |
3129 | |
3130 | #define netif_printk(priv, type, level, dev, fmt, args...) \ |
3131 | do { \ |
3132 | if (netif_msg_##type(priv)) \ |
3133 | netdev_printk(level, (dev), fmt, ##args); \ |
3134 | } while (0) |
3135 | |
3136 | #define netif_level(level, priv, type, dev, fmt, args...) \ |
3137 | do { \ |
3138 | if (netif_msg_##type(priv)) \ |
3139 | netdev_##level(dev, fmt, ##args); \ |
3140 | } while (0) |
3141 | |
3142 | #define netif_emerg(priv, type, dev, fmt, args...) \ |
3143 | netif_level(emerg, priv, type, dev, fmt, ##args) |
3144 | #define netif_alert(priv, type, dev, fmt, args...) \ |
3145 | netif_level(alert, priv, type, dev, fmt, ##args) |
3146 | #define netif_crit(priv, type, dev, fmt, args...) \ |
3147 | netif_level(crit, priv, type, dev, fmt, ##args) |
3148 | #define netif_err(priv, type, dev, fmt, args...) \ |
3149 | netif_level(err, priv, type, dev, fmt, ##args) |
3150 | #define netif_warn(priv, type, dev, fmt, args...) \ |
3151 | netif_level(warn, priv, type, dev, fmt, ##args) |
3152 | #define netif_notice(priv, type, dev, fmt, args...) \ |
3153 | netif_level(notice, priv, type, dev, fmt, ##args) |
3154 | #define netif_info(priv, type, dev, fmt, args...) \ |
3155 | netif_level(info, priv, type, dev, fmt, ##args) |
3156 | |
3157 | #if defined(CONFIG_DYNAMIC_DEBUG) |
3158 | #define netif_dbg(priv, type, netdev, format, args...) \ |
3159 | do { \ |
3160 | if (netif_msg_##type(priv)) \ |
3161 | dynamic_netdev_dbg(netdev, format, ##args); \ |
3162 | } while (0) |
3163 | #elif defined(DEBUG) |
3164 | #define netif_dbg(priv, type, dev, format, args...) \ |
3165 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args) |
3166 | #else |
3167 | #define netif_dbg(priv, type, dev, format, args...) \ |
3168 | ({ \ |
3169 | if (0) \ |
3170 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
3171 | 0; \ |
3172 | }) |
3173 | #endif |
3174 | |
3175 | #if defined(VERBOSE_DEBUG) |
3176 | #define netif_vdbg netif_dbg |
3177 | #else |
3178 | #define netif_vdbg(priv, type, dev, format, args...) \ |
3179 | ({ \ |
3180 | if (0) \ |
3181 | netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \ |
3182 | 0; \ |
3183 | }) |
3184 | #endif |
3185 | |
3186 | /* |
3187 | * The list of packet types we will receive (as opposed to discard) |
3188 | * and the routines to invoke. |
3189 | * |
3190 | * Why 16. Because with 16 the only overlap we get on a hash of the |
3191 | * low nibble of the protocol value is RARP/SNAP/X.25. |
3192 | * |
3193 | * NOTE: That is no longer true with the addition of VLAN tags. Not |
3194 | * sure which should go first, but I bet it won't make much |
3195 | * difference if we are running VLANs. The good news is that |
3196 | * this protocol won't be in the list unless compiled in, so |
3197 | * the average user (w/out VLANs) will not be adversely affected. |
3198 | * --BLG |
3199 | * |
3200 | * 0800 IP |
3201 | * 8100 802.1Q VLAN |
3202 | * 0001 802.3 |
3203 | * 0002 AX.25 |
3204 | * 0004 802.2 |
3205 | * 8035 RARP |
3206 | * 0005 SNAP |
3207 | * 0805 X.25 |
3208 | * 0806 ARP |
3209 | * 8137 IPX |
3210 | * 0009 Localtalk |
3211 | * 86DD IPv6 |
3212 | */ |
3213 | #define PTYPE_HASH_SIZE (16) |
3214 | #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1) |
3215 | |
3216 | #endif /* _LINUX_NETDEVICE_H */ |
3217 |
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