1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
4 | * operating system. INET is implemented using the BSD Socket |
5 | * interface as the means of communication with the user level. |
6 | * |
7 | * Definitions for the Interfaces handler. |
8 | * |
9 | * Version: @(#)dev.h 1.0.10 08/12/93 |
10 | * |
11 | * Authors: Ross Biro |
12 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
13 | * Corey Minyard <wf-rch!minyard@relay.EU.net> |
14 | * Donald J. Becker, <becker@cesdis.gsfc.nasa.gov> |
15 | * Alan Cox, <alan@lxorguk.ukuu.org.uk> |
16 | * Bjorn Ekwall. <bj0rn@blox.se> |
17 | * Pekka Riikonen <priikone@poseidon.pspt.fi> |
18 | * |
19 | * Moved to /usr/include/linux for NET3 |
20 | */ |
21 | #ifndef _LINUX_NETDEVICE_H |
22 | #define _LINUX_NETDEVICE_H |
23 | |
24 | #include <linux/timer.h> |
25 | #include <linux/bug.h> |
26 | #include <linux/delay.h> |
27 | #include <linux/atomic.h> |
28 | #include <linux/prefetch.h> |
29 | #include <asm/cache.h> |
30 | #include <asm/byteorder.h> |
31 | #include <asm/local.h> |
32 | |
33 | #include <linux/percpu.h> |
34 | #include <linux/rculist.h> |
35 | #include <linux/workqueue.h> |
36 | #include <linux/dynamic_queue_limits.h> |
37 | |
38 | #include <net/net_namespace.h> |
39 | #ifdef CONFIG_DCB |
40 | #include <net/dcbnl.h> |
41 | #endif |
42 | #include <net/netprio_cgroup.h> |
43 | #include <net/xdp.h> |
44 | |
45 | #include <linux/netdev_features.h> |
46 | #include <linux/neighbour.h> |
47 | #include <uapi/linux/netdevice.h> |
48 | #include <uapi/linux/if_bonding.h> |
49 | #include <uapi/linux/pkt_cls.h> |
50 | #include <linux/hashtable.h> |
51 | #include <linux/rbtree.h> |
52 | #include <net/net_trackers.h> |
53 | #include <net/net_debug.h> |
54 | |
55 | struct netpoll_info; |
56 | struct device; |
57 | struct ethtool_ops; |
58 | struct phy_device; |
59 | struct dsa_port; |
60 | struct ip_tunnel_parm; |
61 | struct macsec_context; |
62 | struct macsec_ops; |
63 | struct netdev_name_node; |
64 | struct sd_flow_limit; |
65 | struct sfp_bus; |
66 | /* 802.11 specific */ |
67 | struct wireless_dev; |
68 | /* 802.15.4 specific */ |
69 | struct wpan_dev; |
70 | struct mpls_dev; |
71 | /* UDP Tunnel offloads */ |
72 | struct udp_tunnel_info; |
73 | struct udp_tunnel_nic_info; |
74 | struct udp_tunnel_nic; |
75 | struct bpf_prog; |
76 | struct xdp_buff; |
77 | |
78 | void synchronize_net(void); |
79 | void netdev_set_default_ethtool_ops(struct net_device *dev, |
80 | const struct ethtool_ops *ops); |
81 | |
82 | /* Backlog congestion levels */ |
83 | #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */ |
84 | #define NET_RX_DROP 1 /* packet dropped */ |
85 | |
86 | #define MAX_NEST_DEV 8 |
87 | |
88 | /* |
89 | * Transmit return codes: transmit return codes originate from three different |
90 | * namespaces: |
91 | * |
92 | * - qdisc return codes |
93 | * - driver transmit return codes |
94 | * - errno values |
95 | * |
96 | * Drivers are allowed to return any one of those in their hard_start_xmit() |
97 | * function. Real network devices commonly used with qdiscs should only return |
98 | * the driver transmit return codes though - when qdiscs are used, the actual |
99 | * transmission happens asynchronously, so the value is not propagated to |
100 | * higher layers. Virtual network devices transmit synchronously; in this case |
101 | * the driver transmit return codes are consumed by dev_queue_xmit(), and all |
102 | * others are propagated to higher layers. |
103 | */ |
104 | |
105 | /* qdisc ->enqueue() return codes. */ |
106 | #define NET_XMIT_SUCCESS 0x00 |
107 | #define NET_XMIT_DROP 0x01 /* skb dropped */ |
108 | #define NET_XMIT_CN 0x02 /* congestion notification */ |
109 | #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */ |
110 | |
111 | /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It |
112 | * indicates that the device will soon be dropping packets, or already drops |
113 | * some packets of the same priority; prompting us to send less aggressively. */ |
114 | #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e)) |
115 | #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0) |
116 | |
117 | /* Driver transmit return codes */ |
118 | #define NETDEV_TX_MASK 0xf0 |
119 | |
120 | enum netdev_tx { |
121 | __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */ |
122 | NETDEV_TX_OK = 0x00, /* driver took care of packet */ |
123 | NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/ |
124 | }; |
125 | typedef enum netdev_tx netdev_tx_t; |
126 | |
127 | /* |
128 | * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant; |
129 | * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed. |
130 | */ |
131 | static inline bool dev_xmit_complete(int rc) |
132 | { |
133 | /* |
134 | * Positive cases with an skb consumed by a driver: |
135 | * - successful transmission (rc == NETDEV_TX_OK) |
136 | * - error while transmitting (rc < 0) |
137 | * - error while queueing to a different device (rc & NET_XMIT_MASK) |
138 | */ |
139 | if (likely(rc < NET_XMIT_MASK)) |
140 | return true; |
141 | |
142 | return false; |
143 | } |
144 | |
145 | /* |
146 | * Compute the worst-case header length according to the protocols |
147 | * used. |
148 | */ |
149 | |
150 | #if defined(CONFIG_HYPERV_NET) |
151 | # define LL_MAX_HEADER 128 |
152 | #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25) |
153 | # if defined(CONFIG_MAC80211_MESH) |
154 | # define LL_MAX_HEADER 128 |
155 | # else |
156 | # define LL_MAX_HEADER 96 |
157 | # endif |
158 | #else |
159 | # define 32 |
160 | #endif |
161 | |
162 | #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \ |
163 | !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL) |
164 | #define LL_MAX_HEADER |
165 | #else |
166 | #define MAX_HEADER (LL_MAX_HEADER + 48) |
167 | #endif |
168 | |
169 | /* |
170 | * Old network device statistics. Fields are native words |
171 | * (unsigned long) so they can be read and written atomically. |
172 | */ |
173 | |
174 | struct net_device_stats { |
175 | unsigned long rx_packets; |
176 | unsigned long tx_packets; |
177 | unsigned long rx_bytes; |
178 | unsigned long tx_bytes; |
179 | unsigned long rx_errors; |
180 | unsigned long tx_errors; |
181 | unsigned long rx_dropped; |
182 | unsigned long tx_dropped; |
183 | unsigned long multicast; |
184 | unsigned long collisions; |
185 | unsigned long rx_length_errors; |
186 | unsigned long rx_over_errors; |
187 | unsigned long rx_crc_errors; |
188 | unsigned long rx_frame_errors; |
189 | unsigned long rx_fifo_errors; |
190 | unsigned long rx_missed_errors; |
191 | unsigned long tx_aborted_errors; |
192 | unsigned long tx_carrier_errors; |
193 | unsigned long tx_fifo_errors; |
194 | unsigned long tx_heartbeat_errors; |
195 | unsigned long tx_window_errors; |
196 | unsigned long rx_compressed; |
197 | unsigned long tx_compressed; |
198 | }; |
199 | |
200 | /* per-cpu stats, allocated on demand. |
201 | * Try to fit them in a single cache line, for dev_get_stats() sake. |
202 | */ |
203 | struct net_device_core_stats { |
204 | unsigned long rx_dropped; |
205 | unsigned long tx_dropped; |
206 | unsigned long rx_nohandler; |
207 | unsigned long rx_otherhost_dropped; |
208 | } __aligned(4 * sizeof(unsigned long)); |
209 | |
210 | #include <linux/cache.h> |
211 | #include <linux/skbuff.h> |
212 | |
213 | #ifdef CONFIG_RPS |
214 | #include <linux/static_key.h> |
215 | extern struct static_key_false rps_needed; |
216 | extern struct static_key_false rfs_needed; |
217 | #endif |
218 | |
219 | struct neighbour; |
220 | struct neigh_parms; |
221 | struct sk_buff; |
222 | |
223 | struct netdev_hw_addr { |
224 | struct list_head list; |
225 | struct rb_node node; |
226 | unsigned char addr[MAX_ADDR_LEN]; |
227 | unsigned char type; |
228 | #define NETDEV_HW_ADDR_T_LAN 1 |
229 | #define NETDEV_HW_ADDR_T_SAN 2 |
230 | #define NETDEV_HW_ADDR_T_UNICAST 3 |
231 | #define NETDEV_HW_ADDR_T_MULTICAST 4 |
232 | bool global_use; |
233 | int sync_cnt; |
234 | int refcount; |
235 | int synced; |
236 | struct rcu_head rcu_head; |
237 | }; |
238 | |
239 | struct netdev_hw_addr_list { |
240 | struct list_head list; |
241 | int count; |
242 | |
243 | /* Auxiliary tree for faster lookup on addition and deletion */ |
244 | struct rb_root tree; |
245 | }; |
246 | |
247 | #define netdev_hw_addr_list_count(l) ((l)->count) |
248 | #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0) |
249 | #define netdev_hw_addr_list_for_each(ha, l) \ |
250 | list_for_each_entry(ha, &(l)->list, list) |
251 | |
252 | #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc) |
253 | #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc) |
254 | #define netdev_for_each_uc_addr(ha, dev) \ |
255 | netdev_hw_addr_list_for_each(ha, &(dev)->uc) |
256 | |
257 | #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc) |
258 | #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc) |
259 | #define netdev_for_each_mc_addr(ha, dev) \ |
260 | netdev_hw_addr_list_for_each(ha, &(dev)->mc) |
261 | |
262 | struct hh_cache { |
263 | unsigned int hh_len; |
264 | seqlock_t hh_lock; |
265 | |
266 | /* cached hardware header; allow for machine alignment needs. */ |
267 | #define HH_DATA_MOD 16 |
268 | #define HH_DATA_OFF(__len) \ |
269 | (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1)) |
270 | #define HH_DATA_ALIGN(__len) \ |
271 | (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1)) |
272 | unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)]; |
273 | }; |
274 | |
275 | /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much. |
276 | * Alternative is: |
277 | * dev->hard_header_len ? (dev->hard_header_len + |
278 | * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0 |
279 | * |
280 | * We could use other alignment values, but we must maintain the |
281 | * relationship HH alignment <= LL alignment. |
282 | */ |
283 | #define LL_RESERVED_SPACE(dev) \ |
284 | ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
285 | #define (dev,extra) \ |
286 | ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD) |
287 | |
288 | struct { |
289 | int (*) (struct sk_buff *skb, struct net_device *dev, |
290 | unsigned short type, const void *daddr, |
291 | const void *saddr, unsigned int len); |
292 | int (*)(const struct sk_buff *skb, unsigned char *haddr); |
293 | int (*)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type); |
294 | void (*)(struct hh_cache *hh, |
295 | const struct net_device *dev, |
296 | const unsigned char *haddr); |
297 | bool (*)(const char *, unsigned int len); |
298 | __be16 (*)(const struct sk_buff *skb); |
299 | }; |
300 | |
301 | /* These flag bits are private to the generic network queueing |
302 | * layer; they may not be explicitly referenced by any other |
303 | * code. |
304 | */ |
305 | |
306 | enum netdev_state_t { |
307 | __LINK_STATE_START, |
308 | __LINK_STATE_PRESENT, |
309 | __LINK_STATE_NOCARRIER, |
310 | __LINK_STATE_LINKWATCH_PENDING, |
311 | __LINK_STATE_DORMANT, |
312 | __LINK_STATE_TESTING, |
313 | }; |
314 | |
315 | struct gro_list { |
316 | struct list_head list; |
317 | int count; |
318 | }; |
319 | |
320 | /* |
321 | * size of gro hash buckets, must less than bit number of |
322 | * napi_struct::gro_bitmask |
323 | */ |
324 | #define GRO_HASH_BUCKETS 8 |
325 | |
326 | /* |
327 | * Structure for NAPI scheduling similar to tasklet but with weighting |
328 | */ |
329 | struct napi_struct { |
330 | /* The poll_list must only be managed by the entity which |
331 | * changes the state of the NAPI_STATE_SCHED bit. This means |
332 | * whoever atomically sets that bit can add this napi_struct |
333 | * to the per-CPU poll_list, and whoever clears that bit |
334 | * can remove from the list right before clearing the bit. |
335 | */ |
336 | struct list_head poll_list; |
337 | |
338 | unsigned long state; |
339 | int weight; |
340 | int defer_hard_irqs_count; |
341 | unsigned long gro_bitmask; |
342 | int (*poll)(struct napi_struct *, int); |
343 | #ifdef CONFIG_NETPOLL |
344 | int poll_owner; |
345 | #endif |
346 | struct net_device *dev; |
347 | struct gro_list gro_hash[GRO_HASH_BUCKETS]; |
348 | struct sk_buff *skb; |
349 | struct list_head rx_list; /* Pending GRO_NORMAL skbs */ |
350 | int rx_count; /* length of rx_list */ |
351 | struct hrtimer timer; |
352 | struct list_head dev_list; |
353 | struct hlist_node napi_hash_node; |
354 | unsigned int napi_id; |
355 | struct task_struct *thread; |
356 | }; |
357 | |
358 | enum { |
359 | NAPI_STATE_SCHED, /* Poll is scheduled */ |
360 | NAPI_STATE_MISSED, /* reschedule a napi */ |
361 | NAPI_STATE_DISABLE, /* Disable pending */ |
362 | NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */ |
363 | NAPI_STATE_LISTED, /* NAPI added to system lists */ |
364 | NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */ |
365 | NAPI_STATE_IN_BUSY_POLL, /* sk_busy_loop() owns this NAPI */ |
366 | NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/ |
367 | NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/ |
368 | NAPI_STATE_SCHED_THREADED, /* Napi is currently scheduled in threaded mode */ |
369 | }; |
370 | |
371 | enum { |
372 | NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED), |
373 | NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED), |
374 | NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE), |
375 | NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC), |
376 | NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED), |
377 | NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL), |
378 | NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL), |
379 | NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL), |
380 | NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED), |
381 | NAPIF_STATE_SCHED_THREADED = BIT(NAPI_STATE_SCHED_THREADED), |
382 | }; |
383 | |
384 | enum gro_result { |
385 | GRO_MERGED, |
386 | GRO_MERGED_FREE, |
387 | GRO_HELD, |
388 | GRO_NORMAL, |
389 | GRO_CONSUMED, |
390 | }; |
391 | typedef enum gro_result gro_result_t; |
392 | |
393 | /* |
394 | * enum rx_handler_result - Possible return values for rx_handlers. |
395 | * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it |
396 | * further. |
397 | * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in |
398 | * case skb->dev was changed by rx_handler. |
399 | * @RX_HANDLER_EXACT: Force exact delivery, no wildcard. |
400 | * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called. |
401 | * |
402 | * rx_handlers are functions called from inside __netif_receive_skb(), to do |
403 | * special processing of the skb, prior to delivery to protocol handlers. |
404 | * |
405 | * Currently, a net_device can only have a single rx_handler registered. Trying |
406 | * to register a second rx_handler will return -EBUSY. |
407 | * |
408 | * To register a rx_handler on a net_device, use netdev_rx_handler_register(). |
409 | * To unregister a rx_handler on a net_device, use |
410 | * netdev_rx_handler_unregister(). |
411 | * |
412 | * Upon return, rx_handler is expected to tell __netif_receive_skb() what to |
413 | * do with the skb. |
414 | * |
415 | * If the rx_handler consumed the skb in some way, it should return |
416 | * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for |
417 | * the skb to be delivered in some other way. |
418 | * |
419 | * If the rx_handler changed skb->dev, to divert the skb to another |
420 | * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the |
421 | * new device will be called if it exists. |
422 | * |
423 | * If the rx_handler decides the skb should be ignored, it should return |
424 | * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that |
425 | * are registered on exact device (ptype->dev == skb->dev). |
426 | * |
427 | * If the rx_handler didn't change skb->dev, but wants the skb to be normally |
428 | * delivered, it should return RX_HANDLER_PASS. |
429 | * |
430 | * A device without a registered rx_handler will behave as if rx_handler |
431 | * returned RX_HANDLER_PASS. |
432 | */ |
433 | |
434 | enum rx_handler_result { |
435 | RX_HANDLER_CONSUMED, |
436 | RX_HANDLER_ANOTHER, |
437 | RX_HANDLER_EXACT, |
438 | RX_HANDLER_PASS, |
439 | }; |
440 | typedef enum rx_handler_result rx_handler_result_t; |
441 | typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb); |
442 | |
443 | void __napi_schedule(struct napi_struct *n); |
444 | void __napi_schedule_irqoff(struct napi_struct *n); |
445 | |
446 | static inline bool napi_disable_pending(struct napi_struct *n) |
447 | { |
448 | return test_bit(NAPI_STATE_DISABLE, &n->state); |
449 | } |
450 | |
451 | static inline bool napi_prefer_busy_poll(struct napi_struct *n) |
452 | { |
453 | return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state); |
454 | } |
455 | |
456 | bool napi_schedule_prep(struct napi_struct *n); |
457 | |
458 | /** |
459 | * napi_schedule - schedule NAPI poll |
460 | * @n: NAPI context |
461 | * |
462 | * Schedule NAPI poll routine to be called if it is not already |
463 | * running. |
464 | */ |
465 | static inline void napi_schedule(struct napi_struct *n) |
466 | { |
467 | if (napi_schedule_prep(n)) |
468 | __napi_schedule(n); |
469 | } |
470 | |
471 | /** |
472 | * napi_schedule_irqoff - schedule NAPI poll |
473 | * @n: NAPI context |
474 | * |
475 | * Variant of napi_schedule(), assuming hard irqs are masked. |
476 | */ |
477 | static inline void napi_schedule_irqoff(struct napi_struct *n) |
478 | { |
479 | if (napi_schedule_prep(n)) |
480 | __napi_schedule_irqoff(n); |
481 | } |
482 | |
483 | /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */ |
484 | static inline bool napi_reschedule(struct napi_struct *napi) |
485 | { |
486 | if (napi_schedule_prep(napi)) { |
487 | __napi_schedule(napi); |
488 | return true; |
489 | } |
490 | return false; |
491 | } |
492 | |
493 | bool napi_complete_done(struct napi_struct *n, int work_done); |
494 | /** |
495 | * napi_complete - NAPI processing complete |
496 | * @n: NAPI context |
497 | * |
498 | * Mark NAPI processing as complete. |
499 | * Consider using napi_complete_done() instead. |
500 | * Return false if device should avoid rearming interrupts. |
501 | */ |
502 | static inline bool napi_complete(struct napi_struct *n) |
503 | { |
504 | return napi_complete_done(n, 0); |
505 | } |
506 | |
507 | int dev_set_threaded(struct net_device *dev, bool threaded); |
508 | |
509 | /** |
510 | * napi_disable - prevent NAPI from scheduling |
511 | * @n: NAPI context |
512 | * |
513 | * Stop NAPI from being scheduled on this context. |
514 | * Waits till any outstanding processing completes. |
515 | */ |
516 | void napi_disable(struct napi_struct *n); |
517 | |
518 | void napi_enable(struct napi_struct *n); |
519 | |
520 | /** |
521 | * napi_synchronize - wait until NAPI is not running |
522 | * @n: NAPI context |
523 | * |
524 | * Wait until NAPI is done being scheduled on this context. |
525 | * Waits till any outstanding processing completes but |
526 | * does not disable future activations. |
527 | */ |
528 | static inline void napi_synchronize(const struct napi_struct *n) |
529 | { |
530 | if (IS_ENABLED(CONFIG_SMP)) |
531 | while (test_bit(NAPI_STATE_SCHED, &n->state)) |
532 | msleep(1); |
533 | else |
534 | barrier(); |
535 | } |
536 | |
537 | /** |
538 | * napi_if_scheduled_mark_missed - if napi is running, set the |
539 | * NAPIF_STATE_MISSED |
540 | * @n: NAPI context |
541 | * |
542 | * If napi is running, set the NAPIF_STATE_MISSED, and return true if |
543 | * NAPI is scheduled. |
544 | **/ |
545 | static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n) |
546 | { |
547 | unsigned long val, new; |
548 | |
549 | do { |
550 | val = READ_ONCE(n->state); |
551 | if (val & NAPIF_STATE_DISABLE) |
552 | return true; |
553 | |
554 | if (!(val & NAPIF_STATE_SCHED)) |
555 | return false; |
556 | |
557 | new = val | NAPIF_STATE_MISSED; |
558 | } while (cmpxchg(&n->state, val, new) != val); |
559 | |
560 | return true; |
561 | } |
562 | |
563 | enum netdev_queue_state_t { |
564 | __QUEUE_STATE_DRV_XOFF, |
565 | __QUEUE_STATE_STACK_XOFF, |
566 | __QUEUE_STATE_FROZEN, |
567 | }; |
568 | |
569 | #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF) |
570 | #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF) |
571 | #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN) |
572 | |
573 | #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF) |
574 | #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \ |
575 | QUEUE_STATE_FROZEN) |
576 | #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \ |
577 | QUEUE_STATE_FROZEN) |
578 | |
579 | /* |
580 | * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The |
581 | * netif_tx_* functions below are used to manipulate this flag. The |
582 | * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit |
583 | * queue independently. The netif_xmit_*stopped functions below are called |
584 | * to check if the queue has been stopped by the driver or stack (either |
585 | * of the XOFF bits are set in the state). Drivers should not need to call |
586 | * netif_xmit*stopped functions, they should only be using netif_tx_*. |
587 | */ |
588 | |
589 | struct netdev_queue { |
590 | /* |
591 | * read-mostly part |
592 | */ |
593 | struct net_device *dev; |
594 | netdevice_tracker dev_tracker; |
595 | |
596 | struct Qdisc __rcu *qdisc; |
597 | struct Qdisc *qdisc_sleeping; |
598 | #ifdef CONFIG_SYSFS |
599 | struct kobject kobj; |
600 | #endif |
601 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
602 | int numa_node; |
603 | #endif |
604 | unsigned long tx_maxrate; |
605 | /* |
606 | * Number of TX timeouts for this queue |
607 | * (/sys/class/net/DEV/Q/trans_timeout) |
608 | */ |
609 | atomic_long_t trans_timeout; |
610 | |
611 | /* Subordinate device that the queue has been assigned to */ |
612 | struct net_device *sb_dev; |
613 | #ifdef CONFIG_XDP_SOCKETS |
614 | struct xsk_buff_pool *pool; |
615 | #endif |
616 | /* |
617 | * write-mostly part |
618 | */ |
619 | spinlock_t _xmit_lock ____cacheline_aligned_in_smp; |
620 | int xmit_lock_owner; |
621 | /* |
622 | * Time (in jiffies) of last Tx |
623 | */ |
624 | unsigned long trans_start; |
625 | |
626 | unsigned long state; |
627 | |
628 | #ifdef CONFIG_BQL |
629 | struct dql dql; |
630 | #endif |
631 | } ____cacheline_aligned_in_smp; |
632 | |
633 | extern int sysctl_fb_tunnels_only_for_init_net; |
634 | extern int sysctl_devconf_inherit_init_net; |
635 | |
636 | /* |
637 | * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns |
638 | * == 1 : For initns only |
639 | * == 2 : For none. |
640 | */ |
641 | static inline bool net_has_fallback_tunnels(const struct net *net) |
642 | { |
643 | return !IS_ENABLED(CONFIG_SYSCTL) || |
644 | !sysctl_fb_tunnels_only_for_init_net || |
645 | (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1); |
646 | } |
647 | |
648 | static inline int netdev_queue_numa_node_read(const struct netdev_queue *q) |
649 | { |
650 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
651 | return q->numa_node; |
652 | #else |
653 | return NUMA_NO_NODE; |
654 | #endif |
655 | } |
656 | |
657 | static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node) |
658 | { |
659 | #if defined(CONFIG_XPS) && defined(CONFIG_NUMA) |
660 | q->numa_node = node; |
661 | #endif |
662 | } |
663 | |
664 | #ifdef CONFIG_RPS |
665 | /* |
666 | * This structure holds an RPS map which can be of variable length. The |
667 | * map is an array of CPUs. |
668 | */ |
669 | struct rps_map { |
670 | unsigned int len; |
671 | struct rcu_head rcu; |
672 | u16 cpus[]; |
673 | }; |
674 | #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16))) |
675 | |
676 | /* |
677 | * The rps_dev_flow structure contains the mapping of a flow to a CPU, the |
678 | * tail pointer for that CPU's input queue at the time of last enqueue, and |
679 | * a hardware filter index. |
680 | */ |
681 | struct rps_dev_flow { |
682 | u16 cpu; |
683 | u16 filter; |
684 | unsigned int last_qtail; |
685 | }; |
686 | #define RPS_NO_FILTER 0xffff |
687 | |
688 | /* |
689 | * The rps_dev_flow_table structure contains a table of flow mappings. |
690 | */ |
691 | struct rps_dev_flow_table { |
692 | unsigned int mask; |
693 | struct rcu_head rcu; |
694 | struct rps_dev_flow flows[]; |
695 | }; |
696 | #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \ |
697 | ((_num) * sizeof(struct rps_dev_flow))) |
698 | |
699 | /* |
700 | * The rps_sock_flow_table contains mappings of flows to the last CPU |
701 | * on which they were processed by the application (set in recvmsg). |
702 | * Each entry is a 32bit value. Upper part is the high-order bits |
703 | * of flow hash, lower part is CPU number. |
704 | * rps_cpu_mask is used to partition the space, depending on number of |
705 | * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1 |
706 | * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f, |
707 | * meaning we use 32-6=26 bits for the hash. |
708 | */ |
709 | struct rps_sock_flow_table { |
710 | u32 mask; |
711 | |
712 | u32 ents[] ____cacheline_aligned_in_smp; |
713 | }; |
714 | #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num])) |
715 | |
716 | #define RPS_NO_CPU 0xffff |
717 | |
718 | extern u32 rps_cpu_mask; |
719 | extern struct rps_sock_flow_table __rcu *rps_sock_flow_table; |
720 | |
721 | static inline void rps_record_sock_flow(struct rps_sock_flow_table *table, |
722 | u32 hash) |
723 | { |
724 | if (table && hash) { |
725 | unsigned int index = hash & table->mask; |
726 | u32 val = hash & ~rps_cpu_mask; |
727 | |
728 | /* We only give a hint, preemption can change CPU under us */ |
729 | val |= raw_smp_processor_id(); |
730 | |
731 | if (table->ents[index] != val) |
732 | table->ents[index] = val; |
733 | } |
734 | } |
735 | |
736 | #ifdef CONFIG_RFS_ACCEL |
737 | bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id, |
738 | u16 filter_id); |
739 | #endif |
740 | #endif /* CONFIG_RPS */ |
741 | |
742 | /* This structure contains an instance of an RX queue. */ |
743 | struct netdev_rx_queue { |
744 | struct xdp_rxq_info xdp_rxq; |
745 | #ifdef CONFIG_RPS |
746 | struct rps_map __rcu *rps_map; |
747 | struct rps_dev_flow_table __rcu *rps_flow_table; |
748 | #endif |
749 | struct kobject kobj; |
750 | struct net_device *dev; |
751 | netdevice_tracker dev_tracker; |
752 | |
753 | #ifdef CONFIG_XDP_SOCKETS |
754 | struct xsk_buff_pool *pool; |
755 | #endif |
756 | } ____cacheline_aligned_in_smp; |
757 | |
758 | /* |
759 | * RX queue sysfs structures and functions. |
760 | */ |
761 | struct rx_queue_attribute { |
762 | struct attribute attr; |
763 | ssize_t (*show)(struct netdev_rx_queue *queue, char *buf); |
764 | ssize_t (*store)(struct netdev_rx_queue *queue, |
765 | const char *buf, size_t len); |
766 | }; |
767 | |
768 | /* XPS map type and offset of the xps map within net_device->xps_maps[]. */ |
769 | enum xps_map_type { |
770 | XPS_CPUS = 0, |
771 | XPS_RXQS, |
772 | XPS_MAPS_MAX, |
773 | }; |
774 | |
775 | #ifdef CONFIG_XPS |
776 | /* |
777 | * This structure holds an XPS map which can be of variable length. The |
778 | * map is an array of queues. |
779 | */ |
780 | struct xps_map { |
781 | unsigned int len; |
782 | unsigned int alloc_len; |
783 | struct rcu_head rcu; |
784 | u16 queues[]; |
785 | }; |
786 | #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16))) |
787 | #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \ |
788 | - sizeof(struct xps_map)) / sizeof(u16)) |
789 | |
790 | /* |
791 | * This structure holds all XPS maps for device. Maps are indexed by CPU. |
792 | * |
793 | * We keep track of the number of cpus/rxqs used when the struct is allocated, |
794 | * in nr_ids. This will help not accessing out-of-bound memory. |
795 | * |
796 | * We keep track of the number of traffic classes used when the struct is |
797 | * allocated, in num_tc. This will be used to navigate the maps, to ensure we're |
798 | * not crossing its upper bound, as the original dev->num_tc can be updated in |
799 | * the meantime. |
800 | */ |
801 | struct xps_dev_maps { |
802 | struct rcu_head rcu; |
803 | unsigned int nr_ids; |
804 | s16 num_tc; |
805 | struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */ |
806 | }; |
807 | |
808 | #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \ |
809 | (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *))) |
810 | |
811 | #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\ |
812 | (_rxqs * (_tcs) * sizeof(struct xps_map *))) |
813 | |
814 | #endif /* CONFIG_XPS */ |
815 | |
816 | #define TC_MAX_QUEUE 16 |
817 | #define TC_BITMASK 15 |
818 | /* HW offloaded queuing disciplines txq count and offset maps */ |
819 | struct netdev_tc_txq { |
820 | u16 count; |
821 | u16 offset; |
822 | }; |
823 | |
824 | #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE) |
825 | /* |
826 | * This structure is to hold information about the device |
827 | * configured to run FCoE protocol stack. |
828 | */ |
829 | struct netdev_fcoe_hbainfo { |
830 | char manufacturer[64]; |
831 | char serial_number[64]; |
832 | char hardware_version[64]; |
833 | char driver_version[64]; |
834 | char optionrom_version[64]; |
835 | char firmware_version[64]; |
836 | char model[256]; |
837 | char model_description[256]; |
838 | }; |
839 | #endif |
840 | |
841 | #define MAX_PHYS_ITEM_ID_LEN 32 |
842 | |
843 | /* This structure holds a unique identifier to identify some |
844 | * physical item (port for example) used by a netdevice. |
845 | */ |
846 | struct netdev_phys_item_id { |
847 | unsigned char id[MAX_PHYS_ITEM_ID_LEN]; |
848 | unsigned char id_len; |
849 | }; |
850 | |
851 | static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a, |
852 | struct netdev_phys_item_id *b) |
853 | { |
854 | return a->id_len == b->id_len && |
855 | memcmp(a->id, b->id, a->id_len) == 0; |
856 | } |
857 | |
858 | typedef u16 (*select_queue_fallback_t)(struct net_device *dev, |
859 | struct sk_buff *skb, |
860 | struct net_device *sb_dev); |
861 | |
862 | enum net_device_path_type { |
863 | DEV_PATH_ETHERNET = 0, |
864 | DEV_PATH_VLAN, |
865 | DEV_PATH_BRIDGE, |
866 | DEV_PATH_PPPOE, |
867 | DEV_PATH_DSA, |
868 | DEV_PATH_MTK_WDMA, |
869 | }; |
870 | |
871 | struct net_device_path { |
872 | enum net_device_path_type type; |
873 | const struct net_device *dev; |
874 | union { |
875 | struct { |
876 | u16 id; |
877 | __be16 proto; |
878 | u8 h_dest[ETH_ALEN]; |
879 | } encap; |
880 | struct { |
881 | enum { |
882 | DEV_PATH_BR_VLAN_KEEP, |
883 | DEV_PATH_BR_VLAN_TAG, |
884 | DEV_PATH_BR_VLAN_UNTAG, |
885 | DEV_PATH_BR_VLAN_UNTAG_HW, |
886 | } vlan_mode; |
887 | u16 vlan_id; |
888 | __be16 vlan_proto; |
889 | } bridge; |
890 | struct { |
891 | int port; |
892 | u16 proto; |
893 | } dsa; |
894 | struct { |
895 | u8 wdma_idx; |
896 | u8 queue; |
897 | u16 wcid; |
898 | u8 bss; |
899 | } mtk_wdma; |
900 | }; |
901 | }; |
902 | |
903 | #define NET_DEVICE_PATH_STACK_MAX 5 |
904 | #define NET_DEVICE_PATH_VLAN_MAX 2 |
905 | |
906 | struct net_device_path_stack { |
907 | int num_paths; |
908 | struct net_device_path path[NET_DEVICE_PATH_STACK_MAX]; |
909 | }; |
910 | |
911 | struct net_device_path_ctx { |
912 | const struct net_device *dev; |
913 | u8 daddr[ETH_ALEN]; |
914 | |
915 | int num_vlans; |
916 | struct { |
917 | u16 id; |
918 | __be16 proto; |
919 | } vlan[NET_DEVICE_PATH_VLAN_MAX]; |
920 | }; |
921 | |
922 | enum tc_setup_type { |
923 | TC_SETUP_QDISC_MQPRIO, |
924 | TC_SETUP_CLSU32, |
925 | TC_SETUP_CLSFLOWER, |
926 | TC_SETUP_CLSMATCHALL, |
927 | TC_SETUP_CLSBPF, |
928 | TC_SETUP_BLOCK, |
929 | TC_SETUP_QDISC_CBS, |
930 | TC_SETUP_QDISC_RED, |
931 | TC_SETUP_QDISC_PRIO, |
932 | TC_SETUP_QDISC_MQ, |
933 | TC_SETUP_QDISC_ETF, |
934 | TC_SETUP_ROOT_QDISC, |
935 | TC_SETUP_QDISC_GRED, |
936 | TC_SETUP_QDISC_TAPRIO, |
937 | TC_SETUP_FT, |
938 | TC_SETUP_QDISC_ETS, |
939 | TC_SETUP_QDISC_TBF, |
940 | TC_SETUP_QDISC_FIFO, |
941 | TC_SETUP_QDISC_HTB, |
942 | TC_SETUP_ACT, |
943 | }; |
944 | |
945 | /* These structures hold the attributes of bpf state that are being passed |
946 | * to the netdevice through the bpf op. |
947 | */ |
948 | enum bpf_netdev_command { |
949 | /* Set or clear a bpf program used in the earliest stages of packet |
950 | * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee |
951 | * is responsible for calling bpf_prog_put on any old progs that are |
952 | * stored. In case of error, the callee need not release the new prog |
953 | * reference, but on success it takes ownership and must bpf_prog_put |
954 | * when it is no longer used. |
955 | */ |
956 | XDP_SETUP_PROG, |
957 | XDP_SETUP_PROG_HW, |
958 | /* BPF program for offload callbacks, invoked at program load time. */ |
959 | BPF_OFFLOAD_MAP_ALLOC, |
960 | BPF_OFFLOAD_MAP_FREE, |
961 | XDP_SETUP_XSK_POOL, |
962 | }; |
963 | |
964 | struct bpf_prog_offload_ops; |
965 | struct netlink_ext_ack; |
966 | struct xdp_umem; |
967 | struct xdp_dev_bulk_queue; |
968 | struct bpf_xdp_link; |
969 | |
970 | enum bpf_xdp_mode { |
971 | XDP_MODE_SKB = 0, |
972 | XDP_MODE_DRV = 1, |
973 | XDP_MODE_HW = 2, |
974 | __MAX_XDP_MODE |
975 | }; |
976 | |
977 | struct bpf_xdp_entity { |
978 | struct bpf_prog *prog; |
979 | struct bpf_xdp_link *link; |
980 | }; |
981 | |
982 | struct netdev_bpf { |
983 | enum bpf_netdev_command command; |
984 | union { |
985 | /* XDP_SETUP_PROG */ |
986 | struct { |
987 | u32 flags; |
988 | struct bpf_prog *prog; |
989 | struct netlink_ext_ack *extack; |
990 | }; |
991 | /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */ |
992 | struct { |
993 | struct bpf_offloaded_map *offmap; |
994 | }; |
995 | /* XDP_SETUP_XSK_POOL */ |
996 | struct { |
997 | struct xsk_buff_pool *pool; |
998 | u16 queue_id; |
999 | } xsk; |
1000 | }; |
1001 | }; |
1002 | |
1003 | /* Flags for ndo_xsk_wakeup. */ |
1004 | #define XDP_WAKEUP_RX (1 << 0) |
1005 | #define XDP_WAKEUP_TX (1 << 1) |
1006 | |
1007 | #ifdef CONFIG_XFRM_OFFLOAD |
1008 | struct xfrmdev_ops { |
1009 | int (*xdo_dev_state_add) (struct xfrm_state *x); |
1010 | void (*xdo_dev_state_delete) (struct xfrm_state *x); |
1011 | void (*xdo_dev_state_free) (struct xfrm_state *x); |
1012 | bool (*xdo_dev_offload_ok) (struct sk_buff *skb, |
1013 | struct xfrm_state *x); |
1014 | void (*xdo_dev_state_advance_esn) (struct xfrm_state *x); |
1015 | }; |
1016 | #endif |
1017 | |
1018 | struct dev_ifalias { |
1019 | struct rcu_head rcuhead; |
1020 | char ifalias[]; |
1021 | }; |
1022 | |
1023 | struct devlink; |
1024 | struct tlsdev_ops; |
1025 | |
1026 | struct netdev_net_notifier { |
1027 | struct list_head list; |
1028 | struct notifier_block *nb; |
1029 | }; |
1030 | |
1031 | /* |
1032 | * This structure defines the management hooks for network devices. |
1033 | * The following hooks can be defined; unless noted otherwise, they are |
1034 | * optional and can be filled with a null pointer. |
1035 | * |
1036 | * int (*ndo_init)(struct net_device *dev); |
1037 | * This function is called once when a network device is registered. |
1038 | * The network device can use this for any late stage initialization |
1039 | * or semantic validation. It can fail with an error code which will |
1040 | * be propagated back to register_netdev. |
1041 | * |
1042 | * void (*ndo_uninit)(struct net_device *dev); |
1043 | * This function is called when device is unregistered or when registration |
1044 | * fails. It is not called if init fails. |
1045 | * |
1046 | * int (*ndo_open)(struct net_device *dev); |
1047 | * This function is called when a network device transitions to the up |
1048 | * state. |
1049 | * |
1050 | * int (*ndo_stop)(struct net_device *dev); |
1051 | * This function is called when a network device transitions to the down |
1052 | * state. |
1053 | * |
1054 | * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1055 | * struct net_device *dev); |
1056 | * Called when a packet needs to be transmitted. |
1057 | * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop |
1058 | * the queue before that can happen; it's for obsolete devices and weird |
1059 | * corner cases, but the stack really does a non-trivial amount |
1060 | * of useless work if you return NETDEV_TX_BUSY. |
1061 | * Required; cannot be NULL. |
1062 | * |
1063 | * netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
1064 | * struct net_device *dev |
1065 | * netdev_features_t features); |
1066 | * Called by core transmit path to determine if device is capable of |
1067 | * performing offload operations on a given packet. This is to give |
1068 | * the device an opportunity to implement any restrictions that cannot |
1069 | * be otherwise expressed by feature flags. The check is called with |
1070 | * the set of features that the stack has calculated and it returns |
1071 | * those the driver believes to be appropriate. |
1072 | * |
1073 | * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb, |
1074 | * struct net_device *sb_dev); |
1075 | * Called to decide which queue to use when device supports multiple |
1076 | * transmit queues. |
1077 | * |
1078 | * void (*ndo_change_rx_flags)(struct net_device *dev, int flags); |
1079 | * This function is called to allow device receiver to make |
1080 | * changes to configuration when multicast or promiscuous is enabled. |
1081 | * |
1082 | * void (*ndo_set_rx_mode)(struct net_device *dev); |
1083 | * This function is called device changes address list filtering. |
1084 | * If driver handles unicast address filtering, it should set |
1085 | * IFF_UNICAST_FLT in its priv_flags. |
1086 | * |
1087 | * int (*ndo_set_mac_address)(struct net_device *dev, void *addr); |
1088 | * This function is called when the Media Access Control address |
1089 | * needs to be changed. If this interface is not defined, the |
1090 | * MAC address can not be changed. |
1091 | * |
1092 | * int (*ndo_validate_addr)(struct net_device *dev); |
1093 | * Test if Media Access Control address is valid for the device. |
1094 | * |
1095 | * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
1096 | * Old-style ioctl entry point. This is used internally by the |
1097 | * appletalk and ieee802154 subsystems but is no longer called by |
1098 | * the device ioctl handler. |
1099 | * |
1100 | * int (*ndo_siocbond)(struct net_device *dev, struct ifreq *ifr, int cmd); |
1101 | * Used by the bonding driver for its device specific ioctls: |
1102 | * SIOCBONDENSLAVE, SIOCBONDRELEASE, SIOCBONDSETHWADDR, SIOCBONDCHANGEACTIVE, |
1103 | * SIOCBONDSLAVEINFOQUERY, and SIOCBONDINFOQUERY |
1104 | * |
1105 | * * int (*ndo_eth_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd); |
1106 | * Called for ethernet specific ioctls: SIOCGMIIPHY, SIOCGMIIREG, |
1107 | * SIOCSMIIREG, SIOCSHWTSTAMP and SIOCGHWTSTAMP. |
1108 | * |
1109 | * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map); |
1110 | * Used to set network devices bus interface parameters. This interface |
1111 | * is retained for legacy reasons; new devices should use the bus |
1112 | * interface (PCI) for low level management. |
1113 | * |
1114 | * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu); |
1115 | * Called when a user wants to change the Maximum Transfer Unit |
1116 | * of a device. |
1117 | * |
1118 | * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue); |
1119 | * Callback used when the transmitter has not made any progress |
1120 | * for dev->watchdog ticks. |
1121 | * |
1122 | * void (*ndo_get_stats64)(struct net_device *dev, |
1123 | * struct rtnl_link_stats64 *storage); |
1124 | * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1125 | * Called when a user wants to get the network device usage |
1126 | * statistics. Drivers must do one of the following: |
1127 | * 1. Define @ndo_get_stats64 to fill in a zero-initialised |
1128 | * rtnl_link_stats64 structure passed by the caller. |
1129 | * 2. Define @ndo_get_stats to update a net_device_stats structure |
1130 | * (which should normally be dev->stats) and return a pointer to |
1131 | * it. The structure may be changed asynchronously only if each |
1132 | * field is written atomically. |
1133 | * 3. Update dev->stats asynchronously and atomically, and define |
1134 | * neither operation. |
1135 | * |
1136 | * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id) |
1137 | * Return true if this device supports offload stats of this attr_id. |
1138 | * |
1139 | * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev, |
1140 | * void *attr_data) |
1141 | * Get statistics for offload operations by attr_id. Write it into the |
1142 | * attr_data pointer. |
1143 | * |
1144 | * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid); |
1145 | * If device supports VLAN filtering this function is called when a |
1146 | * VLAN id is registered. |
1147 | * |
1148 | * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid); |
1149 | * If device supports VLAN filtering this function is called when a |
1150 | * VLAN id is unregistered. |
1151 | * |
1152 | * void (*ndo_poll_controller)(struct net_device *dev); |
1153 | * |
1154 | * SR-IOV management functions. |
1155 | * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac); |
1156 | * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan, |
1157 | * u8 qos, __be16 proto); |
1158 | * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate, |
1159 | * int max_tx_rate); |
1160 | * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting); |
1161 | * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting); |
1162 | * int (*ndo_get_vf_config)(struct net_device *dev, |
1163 | * int vf, struct ifla_vf_info *ivf); |
1164 | * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state); |
1165 | * int (*ndo_set_vf_port)(struct net_device *dev, int vf, |
1166 | * struct nlattr *port[]); |
1167 | * |
1168 | * Enable or disable the VF ability to query its RSS Redirection Table and |
1169 | * Hash Key. This is needed since on some devices VF share this information |
1170 | * with PF and querying it may introduce a theoretical security risk. |
1171 | * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting); |
1172 | * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb); |
1173 | * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type, |
1174 | * void *type_data); |
1175 | * Called to setup any 'tc' scheduler, classifier or action on @dev. |
1176 | * This is always called from the stack with the rtnl lock held and netif |
1177 | * tx queues stopped. This allows the netdevice to perform queue |
1178 | * management safely. |
1179 | * |
1180 | * Fiber Channel over Ethernet (FCoE) offload functions. |
1181 | * int (*ndo_fcoe_enable)(struct net_device *dev); |
1182 | * Called when the FCoE protocol stack wants to start using LLD for FCoE |
1183 | * so the underlying device can perform whatever needed configuration or |
1184 | * initialization to support acceleration of FCoE traffic. |
1185 | * |
1186 | * int (*ndo_fcoe_disable)(struct net_device *dev); |
1187 | * Called when the FCoE protocol stack wants to stop using LLD for FCoE |
1188 | * so the underlying device can perform whatever needed clean-ups to |
1189 | * stop supporting acceleration of FCoE traffic. |
1190 | * |
1191 | * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid, |
1192 | * struct scatterlist *sgl, unsigned int sgc); |
1193 | * Called when the FCoE Initiator wants to initialize an I/O that |
1194 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
1195 | * perform necessary setup and returns 1 to indicate the device is set up |
1196 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
1197 | * |
1198 | * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid); |
1199 | * Called when the FCoE Initiator/Target is done with the DDPed I/O as |
1200 | * indicated by the FC exchange id 'xid', so the underlying device can |
1201 | * clean up and reuse resources for later DDP requests. |
1202 | * |
1203 | * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid, |
1204 | * struct scatterlist *sgl, unsigned int sgc); |
1205 | * Called when the FCoE Target wants to initialize an I/O that |
1206 | * is a possible candidate for Direct Data Placement (DDP). The LLD can |
1207 | * perform necessary setup and returns 1 to indicate the device is set up |
1208 | * successfully to perform DDP on this I/O, otherwise this returns 0. |
1209 | * |
1210 | * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1211 | * struct netdev_fcoe_hbainfo *hbainfo); |
1212 | * Called when the FCoE Protocol stack wants information on the underlying |
1213 | * device. This information is utilized by the FCoE protocol stack to |
1214 | * register attributes with Fiber Channel management service as per the |
1215 | * FC-GS Fabric Device Management Information(FDMI) specification. |
1216 | * |
1217 | * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type); |
1218 | * Called when the underlying device wants to override default World Wide |
1219 | * Name (WWN) generation mechanism in FCoE protocol stack to pass its own |
1220 | * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE |
1221 | * protocol stack to use. |
1222 | * |
1223 | * RFS acceleration. |
1224 | * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb, |
1225 | * u16 rxq_index, u32 flow_id); |
1226 | * Set hardware filter for RFS. rxq_index is the target queue index; |
1227 | * flow_id is a flow ID to be passed to rps_may_expire_flow() later. |
1228 | * Return the filter ID on success, or a negative error code. |
1229 | * |
1230 | * Slave management functions (for bridge, bonding, etc). |
1231 | * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev); |
1232 | * Called to make another netdev an underling. |
1233 | * |
1234 | * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev); |
1235 | * Called to release previously enslaved netdev. |
1236 | * |
1237 | * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev, |
1238 | * struct sk_buff *skb, |
1239 | * bool all_slaves); |
1240 | * Get the xmit slave of master device. If all_slaves is true, function |
1241 | * assume all the slaves can transmit. |
1242 | * |
1243 | * Feature/offload setting functions. |
1244 | * netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1245 | * netdev_features_t features); |
1246 | * Adjusts the requested feature flags according to device-specific |
1247 | * constraints, and returns the resulting flags. Must not modify |
1248 | * the device state. |
1249 | * |
1250 | * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features); |
1251 | * Called to update device configuration to new features. Passed |
1252 | * feature set might be less than what was returned by ndo_fix_features()). |
1253 | * Must return >0 or -errno if it changed dev->features itself. |
1254 | * |
1255 | * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[], |
1256 | * struct net_device *dev, |
1257 | * const unsigned char *addr, u16 vid, u16 flags, |
1258 | * struct netlink_ext_ack *extack); |
1259 | * Adds an FDB entry to dev for addr. |
1260 | * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[], |
1261 | * struct net_device *dev, |
1262 | * const unsigned char *addr, u16 vid) |
1263 | * Deletes the FDB entry from dev coresponding to addr. |
1264 | * int (*ndo_fdb_del_bulk)(struct ndmsg *ndm, struct nlattr *tb[], |
1265 | * struct net_device *dev, |
1266 | * u16 vid, |
1267 | * struct netlink_ext_ack *extack); |
1268 | * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb, |
1269 | * struct net_device *dev, struct net_device *filter_dev, |
1270 | * int *idx) |
1271 | * Used to add FDB entries to dump requests. Implementers should add |
1272 | * entries to skb and update idx with the number of entries. |
1273 | * |
1274 | * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh, |
1275 | * u16 flags, struct netlink_ext_ack *extack) |
1276 | * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq, |
1277 | * struct net_device *dev, u32 filter_mask, |
1278 | * int nlflags) |
1279 | * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh, |
1280 | * u16 flags); |
1281 | * |
1282 | * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier); |
1283 | * Called to change device carrier. Soft-devices (like dummy, team, etc) |
1284 | * which do not represent real hardware may define this to allow their |
1285 | * userspace components to manage their virtual carrier state. Devices |
1286 | * that determine carrier state from physical hardware properties (eg |
1287 | * network cables) or protocol-dependent mechanisms (eg |
1288 | * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function. |
1289 | * |
1290 | * int (*ndo_get_phys_port_id)(struct net_device *dev, |
1291 | * struct netdev_phys_item_id *ppid); |
1292 | * Called to get ID of physical port of this device. If driver does |
1293 | * not implement this, it is assumed that the hw is not able to have |
1294 | * multiple net devices on single physical port. |
1295 | * |
1296 | * int (*ndo_get_port_parent_id)(struct net_device *dev, |
1297 | * struct netdev_phys_item_id *ppid) |
1298 | * Called to get the parent ID of the physical port of this device. |
1299 | * |
1300 | * void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1301 | * struct net_device *dev) |
1302 | * Called by upper layer devices to accelerate switching or other |
1303 | * station functionality into hardware. 'pdev is the lowerdev |
1304 | * to use for the offload and 'dev' is the net device that will |
1305 | * back the offload. Returns a pointer to the private structure |
1306 | * the upper layer will maintain. |
1307 | * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv) |
1308 | * Called by upper layer device to delete the station created |
1309 | * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing |
1310 | * the station and priv is the structure returned by the add |
1311 | * operation. |
1312 | * int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1313 | * int queue_index, u32 maxrate); |
1314 | * Called when a user wants to set a max-rate limitation of specific |
1315 | * TX queue. |
1316 | * int (*ndo_get_iflink)(const struct net_device *dev); |
1317 | * Called to get the iflink value of this device. |
1318 | * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb); |
1319 | * This function is used to get egress tunnel information for given skb. |
1320 | * This is useful for retrieving outer tunnel header parameters while |
1321 | * sampling packet. |
1322 | * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom); |
1323 | * This function is used to specify the headroom that the skb must |
1324 | * consider when allocation skb during packet reception. Setting |
1325 | * appropriate rx headroom value allows avoiding skb head copy on |
1326 | * forward. Setting a negative value resets the rx headroom to the |
1327 | * default value. |
1328 | * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf); |
1329 | * This function is used to set or query state related to XDP on the |
1330 | * netdevice and manage BPF offload. See definition of |
1331 | * enum bpf_netdev_command for details. |
1332 | * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp, |
1333 | * u32 flags); |
1334 | * This function is used to submit @n XDP packets for transmit on a |
1335 | * netdevice. Returns number of frames successfully transmitted, frames |
1336 | * that got dropped are freed/returned via xdp_return_frame(). |
1337 | * Returns negative number, means general error invoking ndo, meaning |
1338 | * no frames were xmit'ed and core-caller will free all frames. |
1339 | * struct net_device *(*ndo_xdp_get_xmit_slave)(struct net_device *dev, |
1340 | * struct xdp_buff *xdp); |
1341 | * Get the xmit slave of master device based on the xdp_buff. |
1342 | * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags); |
1343 | * This function is used to wake up the softirq, ksoftirqd or kthread |
1344 | * responsible for sending and/or receiving packets on a specific |
1345 | * queue id bound to an AF_XDP socket. The flags field specifies if |
1346 | * only RX, only Tx, or both should be woken up using the flags |
1347 | * XDP_WAKEUP_RX and XDP_WAKEUP_TX. |
1348 | * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev); |
1349 | * Get devlink port instance associated with a given netdev. |
1350 | * Called with a reference on the netdevice and devlink locks only, |
1351 | * rtnl_lock is not held. |
1352 | * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p, |
1353 | * int cmd); |
1354 | * Add, change, delete or get information on an IPv4 tunnel. |
1355 | * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev); |
1356 | * If a device is paired with a peer device, return the peer instance. |
1357 | * The caller must be under RCU read context. |
1358 | * int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, struct net_device_path *path); |
1359 | * Get the forwarding path to reach the real device from the HW destination address |
1360 | * ktime_t (*ndo_get_tstamp)(struct net_device *dev, |
1361 | * const struct skb_shared_hwtstamps *hwtstamps, |
1362 | * bool cycles); |
1363 | * Get hardware timestamp based on normal/adjustable time or free running |
1364 | * cycle counter. This function is required if physical clock supports a |
1365 | * free running cycle counter. |
1366 | */ |
1367 | struct net_device_ops { |
1368 | int (*ndo_init)(struct net_device *dev); |
1369 | void (*ndo_uninit)(struct net_device *dev); |
1370 | int (*ndo_open)(struct net_device *dev); |
1371 | int (*ndo_stop)(struct net_device *dev); |
1372 | netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, |
1373 | struct net_device *dev); |
1374 | netdev_features_t (*ndo_features_check)(struct sk_buff *skb, |
1375 | struct net_device *dev, |
1376 | netdev_features_t features); |
1377 | u16 (*ndo_select_queue)(struct net_device *dev, |
1378 | struct sk_buff *skb, |
1379 | struct net_device *sb_dev); |
1380 | void (*ndo_change_rx_flags)(struct net_device *dev, |
1381 | int flags); |
1382 | void (*ndo_set_rx_mode)(struct net_device *dev); |
1383 | int (*ndo_set_mac_address)(struct net_device *dev, |
1384 | void *addr); |
1385 | int (*ndo_validate_addr)(struct net_device *dev); |
1386 | int (*ndo_do_ioctl)(struct net_device *dev, |
1387 | struct ifreq *ifr, int cmd); |
1388 | int (*ndo_eth_ioctl)(struct net_device *dev, |
1389 | struct ifreq *ifr, int cmd); |
1390 | int (*ndo_siocbond)(struct net_device *dev, |
1391 | struct ifreq *ifr, int cmd); |
1392 | int (*ndo_siocwandev)(struct net_device *dev, |
1393 | struct if_settings *ifs); |
1394 | int (*ndo_siocdevprivate)(struct net_device *dev, |
1395 | struct ifreq *ifr, |
1396 | void __user *data, int cmd); |
1397 | int (*ndo_set_config)(struct net_device *dev, |
1398 | struct ifmap *map); |
1399 | int (*ndo_change_mtu)(struct net_device *dev, |
1400 | int new_mtu); |
1401 | int (*ndo_neigh_setup)(struct net_device *dev, |
1402 | struct neigh_parms *); |
1403 | void (*ndo_tx_timeout) (struct net_device *dev, |
1404 | unsigned int txqueue); |
1405 | |
1406 | void (*ndo_get_stats64)(struct net_device *dev, |
1407 | struct rtnl_link_stats64 *storage); |
1408 | bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id); |
1409 | int (*ndo_get_offload_stats)(int attr_id, |
1410 | const struct net_device *dev, |
1411 | void *attr_data); |
1412 | struct net_device_stats* (*ndo_get_stats)(struct net_device *dev); |
1413 | |
1414 | int (*ndo_vlan_rx_add_vid)(struct net_device *dev, |
1415 | __be16 proto, u16 vid); |
1416 | int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, |
1417 | __be16 proto, u16 vid); |
1418 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1419 | void (*ndo_poll_controller)(struct net_device *dev); |
1420 | int (*ndo_netpoll_setup)(struct net_device *dev, |
1421 | struct netpoll_info *info); |
1422 | void (*ndo_netpoll_cleanup)(struct net_device *dev); |
1423 | #endif |
1424 | int (*ndo_set_vf_mac)(struct net_device *dev, |
1425 | int queue, u8 *mac); |
1426 | int (*ndo_set_vf_vlan)(struct net_device *dev, |
1427 | int queue, u16 vlan, |
1428 | u8 qos, __be16 proto); |
1429 | int (*ndo_set_vf_rate)(struct net_device *dev, |
1430 | int vf, int min_tx_rate, |
1431 | int max_tx_rate); |
1432 | int (*ndo_set_vf_spoofchk)(struct net_device *dev, |
1433 | int vf, bool setting); |
1434 | int (*ndo_set_vf_trust)(struct net_device *dev, |
1435 | int vf, bool setting); |
1436 | int (*ndo_get_vf_config)(struct net_device *dev, |
1437 | int vf, |
1438 | struct ifla_vf_info *ivf); |
1439 | int (*ndo_set_vf_link_state)(struct net_device *dev, |
1440 | int vf, int link_state); |
1441 | int (*ndo_get_vf_stats)(struct net_device *dev, |
1442 | int vf, |
1443 | struct ifla_vf_stats |
1444 | *vf_stats); |
1445 | int (*ndo_set_vf_port)(struct net_device *dev, |
1446 | int vf, |
1447 | struct nlattr *port[]); |
1448 | int (*ndo_get_vf_port)(struct net_device *dev, |
1449 | int vf, struct sk_buff *skb); |
1450 | int (*ndo_get_vf_guid)(struct net_device *dev, |
1451 | int vf, |
1452 | struct ifla_vf_guid *node_guid, |
1453 | struct ifla_vf_guid *port_guid); |
1454 | int (*ndo_set_vf_guid)(struct net_device *dev, |
1455 | int vf, u64 guid, |
1456 | int guid_type); |
1457 | int (*)( |
1458 | struct net_device *dev, |
1459 | int vf, bool setting); |
1460 | int (*ndo_setup_tc)(struct net_device *dev, |
1461 | enum tc_setup_type type, |
1462 | void *type_data); |
1463 | #if IS_ENABLED(CONFIG_FCOE) |
1464 | int (*ndo_fcoe_enable)(struct net_device *dev); |
1465 | int (*ndo_fcoe_disable)(struct net_device *dev); |
1466 | int (*ndo_fcoe_ddp_setup)(struct net_device *dev, |
1467 | u16 xid, |
1468 | struct scatterlist *sgl, |
1469 | unsigned int sgc); |
1470 | int (*ndo_fcoe_ddp_done)(struct net_device *dev, |
1471 | u16 xid); |
1472 | int (*ndo_fcoe_ddp_target)(struct net_device *dev, |
1473 | u16 xid, |
1474 | struct scatterlist *sgl, |
1475 | unsigned int sgc); |
1476 | int (*ndo_fcoe_get_hbainfo)(struct net_device *dev, |
1477 | struct netdev_fcoe_hbainfo *hbainfo); |
1478 | #endif |
1479 | |
1480 | #if IS_ENABLED(CONFIG_LIBFCOE) |
1481 | #define NETDEV_FCOE_WWNN 0 |
1482 | #define NETDEV_FCOE_WWPN 1 |
1483 | int (*ndo_fcoe_get_wwn)(struct net_device *dev, |
1484 | u64 *wwn, int type); |
1485 | #endif |
1486 | |
1487 | #ifdef CONFIG_RFS_ACCEL |
1488 | int (*ndo_rx_flow_steer)(struct net_device *dev, |
1489 | const struct sk_buff *skb, |
1490 | u16 rxq_index, |
1491 | u32 flow_id); |
1492 | #endif |
1493 | int (*ndo_add_slave)(struct net_device *dev, |
1494 | struct net_device *slave_dev, |
1495 | struct netlink_ext_ack *extack); |
1496 | int (*ndo_del_slave)(struct net_device *dev, |
1497 | struct net_device *slave_dev); |
1498 | struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev, |
1499 | struct sk_buff *skb, |
1500 | bool all_slaves); |
1501 | struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev, |
1502 | struct sock *sk); |
1503 | netdev_features_t (*ndo_fix_features)(struct net_device *dev, |
1504 | netdev_features_t features); |
1505 | int (*ndo_set_features)(struct net_device *dev, |
1506 | netdev_features_t features); |
1507 | int (*ndo_neigh_construct)(struct net_device *dev, |
1508 | struct neighbour *n); |
1509 | void (*ndo_neigh_destroy)(struct net_device *dev, |
1510 | struct neighbour *n); |
1511 | |
1512 | int (*ndo_fdb_add)(struct ndmsg *ndm, |
1513 | struct nlattr *tb[], |
1514 | struct net_device *dev, |
1515 | const unsigned char *addr, |
1516 | u16 vid, |
1517 | u16 flags, |
1518 | struct netlink_ext_ack *extack); |
1519 | int (*ndo_fdb_del)(struct ndmsg *ndm, |
1520 | struct nlattr *tb[], |
1521 | struct net_device *dev, |
1522 | const unsigned char *addr, |
1523 | u16 vid, struct netlink_ext_ack *extack); |
1524 | int (*ndo_fdb_del_bulk)(struct ndmsg *ndm, |
1525 | struct nlattr *tb[], |
1526 | struct net_device *dev, |
1527 | u16 vid, |
1528 | struct netlink_ext_ack *extack); |
1529 | int (*ndo_fdb_dump)(struct sk_buff *skb, |
1530 | struct netlink_callback *cb, |
1531 | struct net_device *dev, |
1532 | struct net_device *filter_dev, |
1533 | int *idx); |
1534 | int (*ndo_fdb_get)(struct sk_buff *skb, |
1535 | struct nlattr *tb[], |
1536 | struct net_device *dev, |
1537 | const unsigned char *addr, |
1538 | u16 vid, u32 portid, u32 seq, |
1539 | struct netlink_ext_ack *extack); |
1540 | int (*ndo_bridge_setlink)(struct net_device *dev, |
1541 | struct nlmsghdr *nlh, |
1542 | u16 flags, |
1543 | struct netlink_ext_ack *extack); |
1544 | int (*ndo_bridge_getlink)(struct sk_buff *skb, |
1545 | u32 pid, u32 seq, |
1546 | struct net_device *dev, |
1547 | u32 filter_mask, |
1548 | int nlflags); |
1549 | int (*ndo_bridge_dellink)(struct net_device *dev, |
1550 | struct nlmsghdr *nlh, |
1551 | u16 flags); |
1552 | int (*ndo_change_carrier)(struct net_device *dev, |
1553 | bool new_carrier); |
1554 | int (*ndo_get_phys_port_id)(struct net_device *dev, |
1555 | struct netdev_phys_item_id *ppid); |
1556 | int (*ndo_get_port_parent_id)(struct net_device *dev, |
1557 | struct netdev_phys_item_id *ppid); |
1558 | int (*ndo_get_phys_port_name)(struct net_device *dev, |
1559 | char *name, size_t len); |
1560 | void* (*ndo_dfwd_add_station)(struct net_device *pdev, |
1561 | struct net_device *dev); |
1562 | void (*ndo_dfwd_del_station)(struct net_device *pdev, |
1563 | void *priv); |
1564 | |
1565 | int (*ndo_set_tx_maxrate)(struct net_device *dev, |
1566 | int queue_index, |
1567 | u32 maxrate); |
1568 | int (*ndo_get_iflink)(const struct net_device *dev); |
1569 | int (*ndo_fill_metadata_dst)(struct net_device *dev, |
1570 | struct sk_buff *skb); |
1571 | void (*ndo_set_rx_headroom)(struct net_device *dev, |
1572 | int needed_headroom); |
1573 | int (*ndo_bpf)(struct net_device *dev, |
1574 | struct netdev_bpf *bpf); |
1575 | int (*ndo_xdp_xmit)(struct net_device *dev, int n, |
1576 | struct xdp_frame **xdp, |
1577 | u32 flags); |
1578 | struct net_device * (*ndo_xdp_get_xmit_slave)(struct net_device *dev, |
1579 | struct xdp_buff *xdp); |
1580 | int (*ndo_xsk_wakeup)(struct net_device *dev, |
1581 | u32 queue_id, u32 flags); |
1582 | struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev); |
1583 | int (*ndo_tunnel_ctl)(struct net_device *dev, |
1584 | struct ip_tunnel_parm *p, int cmd); |
1585 | struct net_device * (*ndo_get_peer_dev)(struct net_device *dev); |
1586 | int (*ndo_fill_forward_path)(struct net_device_path_ctx *ctx, |
1587 | struct net_device_path *path); |
1588 | ktime_t (*ndo_get_tstamp)(struct net_device *dev, |
1589 | const struct skb_shared_hwtstamps *hwtstamps, |
1590 | bool cycles); |
1591 | }; |
1592 | |
1593 | /** |
1594 | * enum netdev_priv_flags - &struct net_device priv_flags |
1595 | * |
1596 | * These are the &struct net_device, they are only set internally |
1597 | * by drivers and used in the kernel. These flags are invisible to |
1598 | * userspace; this means that the order of these flags can change |
1599 | * during any kernel release. |
1600 | * |
1601 | * You should have a pretty good reason to be extending these flags. |
1602 | * |
1603 | * @IFF_802_1Q_VLAN: 802.1Q VLAN device |
1604 | * @IFF_EBRIDGE: Ethernet bridging device |
1605 | * @IFF_BONDING: bonding master or slave |
1606 | * @IFF_ISATAP: ISATAP interface (RFC4214) |
1607 | * @IFF_WAN_HDLC: WAN HDLC device |
1608 | * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to |
1609 | * release skb->dst |
1610 | * @IFF_DONT_BRIDGE: disallow bridging this ether dev |
1611 | * @IFF_DISABLE_NETPOLL: disable netpoll at run-time |
1612 | * @IFF_MACVLAN_PORT: device used as macvlan port |
1613 | * @IFF_BRIDGE_PORT: device used as bridge port |
1614 | * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port |
1615 | * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit |
1616 | * @IFF_UNICAST_FLT: Supports unicast filtering |
1617 | * @IFF_TEAM_PORT: device used as team port |
1618 | * @IFF_SUPP_NOFCS: device supports sending custom FCS |
1619 | * @IFF_LIVE_ADDR_CHANGE: device supports hardware address |
1620 | * change when it's running |
1621 | * @IFF_MACVLAN: Macvlan device |
1622 | * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account |
1623 | * underlying stacked devices |
1624 | * @IFF_L3MDEV_MASTER: device is an L3 master device |
1625 | * @IFF_NO_QUEUE: device can run without qdisc attached |
1626 | * @IFF_OPENVSWITCH: device is a Open vSwitch master |
1627 | * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device |
1628 | * @IFF_TEAM: device is a team device |
1629 | * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured |
1630 | * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external |
1631 | * entity (i.e. the master device for bridged veth) |
1632 | * @IFF_MACSEC: device is a MACsec device |
1633 | * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook |
1634 | * @IFF_FAILOVER: device is a failover master device |
1635 | * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device |
1636 | * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device |
1637 | * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running |
1638 | * @IFF_TX_SKB_NO_LINEAR: device/driver is capable of xmitting frames with |
1639 | * skb_headlen(skb) == 0 (data starts from frag0) |
1640 | * @IFF_CHANGE_PROTO_DOWN: device supports setting carrier via IFLA_PROTO_DOWN |
1641 | */ |
1642 | enum netdev_priv_flags { |
1643 | IFF_802_1Q_VLAN = 1<<0, |
1644 | IFF_EBRIDGE = 1<<1, |
1645 | IFF_BONDING = 1<<2, |
1646 | IFF_ISATAP = 1<<3, |
1647 | IFF_WAN_HDLC = 1<<4, |
1648 | IFF_XMIT_DST_RELEASE = 1<<5, |
1649 | IFF_DONT_BRIDGE = 1<<6, |
1650 | IFF_DISABLE_NETPOLL = 1<<7, |
1651 | IFF_MACVLAN_PORT = 1<<8, |
1652 | IFF_BRIDGE_PORT = 1<<9, |
1653 | IFF_OVS_DATAPATH = 1<<10, |
1654 | IFF_TX_SKB_SHARING = 1<<11, |
1655 | IFF_UNICAST_FLT = 1<<12, |
1656 | IFF_TEAM_PORT = 1<<13, |
1657 | IFF_SUPP_NOFCS = 1<<14, |
1658 | IFF_LIVE_ADDR_CHANGE = 1<<15, |
1659 | IFF_MACVLAN = 1<<16, |
1660 | IFF_XMIT_DST_RELEASE_PERM = 1<<17, |
1661 | IFF_L3MDEV_MASTER = 1<<18, |
1662 | IFF_NO_QUEUE = 1<<19, |
1663 | IFF_OPENVSWITCH = 1<<20, |
1664 | IFF_L3MDEV_SLAVE = 1<<21, |
1665 | IFF_TEAM = 1<<22, |
1666 | IFF_RXFH_CONFIGURED = 1<<23, |
1667 | IFF_PHONY_HEADROOM = 1<<24, |
1668 | IFF_MACSEC = 1<<25, |
1669 | IFF_NO_RX_HANDLER = 1<<26, |
1670 | IFF_FAILOVER = 1<<27, |
1671 | IFF_FAILOVER_SLAVE = 1<<28, |
1672 | IFF_L3MDEV_RX_HANDLER = 1<<29, |
1673 | IFF_LIVE_RENAME_OK = 1<<30, |
1674 | IFF_TX_SKB_NO_LINEAR = BIT_ULL(31), |
1675 | IFF_CHANGE_PROTO_DOWN = BIT_ULL(32), |
1676 | }; |
1677 | |
1678 | #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN |
1679 | #define IFF_EBRIDGE IFF_EBRIDGE |
1680 | #define IFF_BONDING IFF_BONDING |
1681 | #define IFF_ISATAP IFF_ISATAP |
1682 | #define IFF_WAN_HDLC IFF_WAN_HDLC |
1683 | #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE |
1684 | #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE |
1685 | #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL |
1686 | #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT |
1687 | #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT |
1688 | #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH |
1689 | #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING |
1690 | #define IFF_UNICAST_FLT IFF_UNICAST_FLT |
1691 | #define IFF_TEAM_PORT IFF_TEAM_PORT |
1692 | #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS |
1693 | #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE |
1694 | #define IFF_MACVLAN IFF_MACVLAN |
1695 | #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM |
1696 | #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER |
1697 | #define IFF_NO_QUEUE IFF_NO_QUEUE |
1698 | #define IFF_OPENVSWITCH IFF_OPENVSWITCH |
1699 | #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE |
1700 | #define IFF_TEAM IFF_TEAM |
1701 | #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED |
1702 | #define IFF_PHONY_HEADROOM IFF_PHONY_HEADROOM |
1703 | #define IFF_MACSEC IFF_MACSEC |
1704 | #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER |
1705 | #define IFF_FAILOVER IFF_FAILOVER |
1706 | #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE |
1707 | #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER |
1708 | #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK |
1709 | #define IFF_TX_SKB_NO_LINEAR IFF_TX_SKB_NO_LINEAR |
1710 | |
1711 | /* Specifies the type of the struct net_device::ml_priv pointer */ |
1712 | enum netdev_ml_priv_type { |
1713 | ML_PRIV_NONE, |
1714 | ML_PRIV_CAN, |
1715 | }; |
1716 | |
1717 | /** |
1718 | * struct net_device - The DEVICE structure. |
1719 | * |
1720 | * Actually, this whole structure is a big mistake. It mixes I/O |
1721 | * data with strictly "high-level" data, and it has to know about |
1722 | * almost every data structure used in the INET module. |
1723 | * |
1724 | * @name: This is the first field of the "visible" part of this structure |
1725 | * (i.e. as seen by users in the "Space.c" file). It is the name |
1726 | * of the interface. |
1727 | * |
1728 | * @name_node: Name hashlist node |
1729 | * @ifalias: SNMP alias |
1730 | * @mem_end: Shared memory end |
1731 | * @mem_start: Shared memory start |
1732 | * @base_addr: Device I/O address |
1733 | * @irq: Device IRQ number |
1734 | * |
1735 | * @state: Generic network queuing layer state, see netdev_state_t |
1736 | * @dev_list: The global list of network devices |
1737 | * @napi_list: List entry used for polling NAPI devices |
1738 | * @unreg_list: List entry when we are unregistering the |
1739 | * device; see the function unregister_netdev |
1740 | * @close_list: List entry used when we are closing the device |
1741 | * @ptype_all: Device-specific packet handlers for all protocols |
1742 | * @ptype_specific: Device-specific, protocol-specific packet handlers |
1743 | * |
1744 | * @adj_list: Directly linked devices, like slaves for bonding |
1745 | * @features: Currently active device features |
1746 | * @hw_features: User-changeable features |
1747 | * |
1748 | * @wanted_features: User-requested features |
1749 | * @vlan_features: Mask of features inheritable by VLAN devices |
1750 | * |
1751 | * @hw_enc_features: Mask of features inherited by encapsulating devices |
1752 | * This field indicates what encapsulation |
1753 | * offloads the hardware is capable of doing, |
1754 | * and drivers will need to set them appropriately. |
1755 | * |
1756 | * @mpls_features: Mask of features inheritable by MPLS |
1757 | * @gso_partial_features: value(s) from NETIF_F_GSO\* |
1758 | * |
1759 | * @ifindex: interface index |
1760 | * @group: The group the device belongs to |
1761 | * |
1762 | * @stats: Statistics struct, which was left as a legacy, use |
1763 | * rtnl_link_stats64 instead |
1764 | * |
1765 | * @core_stats: core networking counters, |
1766 | * do not use this in drivers |
1767 | * @carrier_up_count: Number of times the carrier has been up |
1768 | * @carrier_down_count: Number of times the carrier has been down |
1769 | * |
1770 | * @wireless_handlers: List of functions to handle Wireless Extensions, |
1771 | * instead of ioctl, |
1772 | * see <net/iw_handler.h> for details. |
1773 | * @wireless_data: Instance data managed by the core of wireless extensions |
1774 | * |
1775 | * @netdev_ops: Includes several pointers to callbacks, |
1776 | * if one wants to override the ndo_*() functions |
1777 | * @ethtool_ops: Management operations |
1778 | * @l3mdev_ops: Layer 3 master device operations |
1779 | * @ndisc_ops: Includes callbacks for different IPv6 neighbour |
1780 | * discovery handling. Necessary for e.g. 6LoWPAN. |
1781 | * @xfrmdev_ops: Transformation offload operations |
1782 | * @tlsdev_ops: Transport Layer Security offload operations |
1783 | * @header_ops: Includes callbacks for creating,parsing,caching,etc |
1784 | * of Layer 2 headers. |
1785 | * |
1786 | * @flags: Interface flags (a la BSD) |
1787 | * @priv_flags: Like 'flags' but invisible to userspace, |
1788 | * see if.h for the definitions |
1789 | * @gflags: Global flags ( kept as legacy ) |
1790 | * @padded: How much padding added by alloc_netdev() |
1791 | * @operstate: RFC2863 operstate |
1792 | * @link_mode: Mapping policy to operstate |
1793 | * @if_port: Selectable AUI, TP, ... |
1794 | * @dma: DMA channel |
1795 | * @mtu: Interface MTU value |
1796 | * @min_mtu: Interface Minimum MTU value |
1797 | * @max_mtu: Interface Maximum MTU value |
1798 | * @type: Interface hardware type |
1799 | * @hard_header_len: Maximum hardware header length. |
1800 | * @min_header_len: Minimum hardware header length |
1801 | * |
1802 | * @needed_headroom: Extra headroom the hardware may need, but not in all |
1803 | * cases can this be guaranteed |
1804 | * @needed_tailroom: Extra tailroom the hardware may need, but not in all |
1805 | * cases can this be guaranteed. Some cases also use |
1806 | * LL_MAX_HEADER instead to allocate the skb |
1807 | * |
1808 | * interface address info: |
1809 | * |
1810 | * @perm_addr: Permanent hw address |
1811 | * @addr_assign_type: Hw address assignment type |
1812 | * @addr_len: Hardware address length |
1813 | * @upper_level: Maximum depth level of upper devices. |
1814 | * @lower_level: Maximum depth level of lower devices. |
1815 | * @neigh_priv_len: Used in neigh_alloc() |
1816 | * @dev_id: Used to differentiate devices that share |
1817 | * the same link layer address |
1818 | * @dev_port: Used to differentiate devices that share |
1819 | * the same function |
1820 | * @addr_list_lock: XXX: need comments on this one |
1821 | * @name_assign_type: network interface name assignment type |
1822 | * @uc_promisc: Counter that indicates promiscuous mode |
1823 | * has been enabled due to the need to listen to |
1824 | * additional unicast addresses in a device that |
1825 | * does not implement ndo_set_rx_mode() |
1826 | * @uc: unicast mac addresses |
1827 | * @mc: multicast mac addresses |
1828 | * @dev_addrs: list of device hw addresses |
1829 | * @queues_kset: Group of all Kobjects in the Tx and RX queues |
1830 | * @promiscuity: Number of times the NIC is told to work in |
1831 | * promiscuous mode; if it becomes 0 the NIC will |
1832 | * exit promiscuous mode |
1833 | * @allmulti: Counter, enables or disables allmulticast mode |
1834 | * |
1835 | * @vlan_info: VLAN info |
1836 | * @dsa_ptr: dsa specific data |
1837 | * @tipc_ptr: TIPC specific data |
1838 | * @atalk_ptr: AppleTalk link |
1839 | * @ip_ptr: IPv4 specific data |
1840 | * @dn_ptr: DECnet specific data |
1841 | * @ip6_ptr: IPv6 specific data |
1842 | * @ax25_ptr: AX.25 specific data |
1843 | * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering |
1844 | * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network |
1845 | * device struct |
1846 | * @mpls_ptr: mpls_dev struct pointer |
1847 | * @mctp_ptr: MCTP specific data |
1848 | * |
1849 | * @dev_addr: Hw address (before bcast, |
1850 | * because most packets are unicast) |
1851 | * |
1852 | * @_rx: Array of RX queues |
1853 | * @num_rx_queues: Number of RX queues |
1854 | * allocated at register_netdev() time |
1855 | * @real_num_rx_queues: Number of RX queues currently active in device |
1856 | * @xdp_prog: XDP sockets filter program pointer |
1857 | * @gro_flush_timeout: timeout for GRO layer in NAPI |
1858 | * @napi_defer_hard_irqs: If not zero, provides a counter that would |
1859 | * allow to avoid NIC hard IRQ, on busy queues. |
1860 | * |
1861 | * @rx_handler: handler for received packets |
1862 | * @rx_handler_data: XXX: need comments on this one |
1863 | * @miniq_ingress: ingress/clsact qdisc specific data for |
1864 | * ingress processing |
1865 | * @ingress_queue: XXX: need comments on this one |
1866 | * @nf_hooks_ingress: netfilter hooks executed for ingress packets |
1867 | * @broadcast: hw bcast address |
1868 | * |
1869 | * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts, |
1870 | * indexed by RX queue number. Assigned by driver. |
1871 | * This must only be set if the ndo_rx_flow_steer |
1872 | * operation is defined |
1873 | * @index_hlist: Device index hash chain |
1874 | * |
1875 | * @_tx: Array of TX queues |
1876 | * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time |
1877 | * @real_num_tx_queues: Number of TX queues currently active in device |
1878 | * @qdisc: Root qdisc from userspace point of view |
1879 | * @tx_queue_len: Max frames per queue allowed |
1880 | * @tx_global_lock: XXX: need comments on this one |
1881 | * @xdp_bulkq: XDP device bulk queue |
1882 | * @xps_maps: all CPUs/RXQs maps for XPS device |
1883 | * |
1884 | * @xps_maps: XXX: need comments on this one |
1885 | * @miniq_egress: clsact qdisc specific data for |
1886 | * egress processing |
1887 | * @nf_hooks_egress: netfilter hooks executed for egress packets |
1888 | * @qdisc_hash: qdisc hash table |
1889 | * @watchdog_timeo: Represents the timeout that is used by |
1890 | * the watchdog (see dev_watchdog()) |
1891 | * @watchdog_timer: List of timers |
1892 | * |
1893 | * @proto_down_reason: reason a netdev interface is held down |
1894 | * @pcpu_refcnt: Number of references to this device |
1895 | * @dev_refcnt: Number of references to this device |
1896 | * @refcnt_tracker: Tracker directory for tracked references to this device |
1897 | * @todo_list: Delayed register/unregister |
1898 | * @link_watch_list: XXX: need comments on this one |
1899 | * |
1900 | * @reg_state: Register/unregister state machine |
1901 | * @dismantle: Device is going to be freed |
1902 | * @rtnl_link_state: This enum represents the phases of creating |
1903 | * a new link |
1904 | * |
1905 | * @needs_free_netdev: Should unregister perform free_netdev? |
1906 | * @priv_destructor: Called from unregister |
1907 | * @npinfo: XXX: need comments on this one |
1908 | * @nd_net: Network namespace this network device is inside |
1909 | * |
1910 | * @ml_priv: Mid-layer private |
1911 | * @ml_priv_type: Mid-layer private type |
1912 | * @lstats: Loopback statistics |
1913 | * @tstats: Tunnel statistics |
1914 | * @dstats: Dummy statistics |
1915 | * @vstats: Virtual ethernet statistics |
1916 | * |
1917 | * @garp_port: GARP |
1918 | * @mrp_port: MRP |
1919 | * |
1920 | * @dm_private: Drop monitor private |
1921 | * |
1922 | * @dev: Class/net/name entry |
1923 | * @sysfs_groups: Space for optional device, statistics and wireless |
1924 | * sysfs groups |
1925 | * |
1926 | * @sysfs_rx_queue_group: Space for optional per-rx queue attributes |
1927 | * @rtnl_link_ops: Rtnl_link_ops |
1928 | * |
1929 | * @gso_max_size: Maximum size of generic segmentation offload |
1930 | * @tso_max_size: Device (as in HW) limit on the max TSO request size |
1931 | * @gso_max_segs: Maximum number of segments that can be passed to the |
1932 | * NIC for GSO |
1933 | * @tso_max_segs: Device (as in HW) limit on the max TSO segment count |
1934 | * |
1935 | * @dcbnl_ops: Data Center Bridging netlink ops |
1936 | * @num_tc: Number of traffic classes in the net device |
1937 | * @tc_to_txq: XXX: need comments on this one |
1938 | * @prio_tc_map: XXX: need comments on this one |
1939 | * |
1940 | * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp |
1941 | * |
1942 | * @priomap: XXX: need comments on this one |
1943 | * @phydev: Physical device may attach itself |
1944 | * for hardware timestamping |
1945 | * @sfp_bus: attached &struct sfp_bus structure. |
1946 | * |
1947 | * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock |
1948 | * |
1949 | * @proto_down: protocol port state information can be sent to the |
1950 | * switch driver and used to set the phys state of the |
1951 | * switch port. |
1952 | * |
1953 | * @wol_enabled: Wake-on-LAN is enabled |
1954 | * |
1955 | * @threaded: napi threaded mode is enabled |
1956 | * |
1957 | * @net_notifier_list: List of per-net netdev notifier block |
1958 | * that follow this device when it is moved |
1959 | * to another network namespace. |
1960 | * |
1961 | * @macsec_ops: MACsec offloading ops |
1962 | * |
1963 | * @udp_tunnel_nic_info: static structure describing the UDP tunnel |
1964 | * offload capabilities of the device |
1965 | * @udp_tunnel_nic: UDP tunnel offload state |
1966 | * @xdp_state: stores info on attached XDP BPF programs |
1967 | * |
1968 | * @nested_level: Used as a parameter of spin_lock_nested() of |
1969 | * dev->addr_list_lock. |
1970 | * @unlink_list: As netif_addr_lock() can be called recursively, |
1971 | * keep a list of interfaces to be deleted. |
1972 | * @gro_max_size: Maximum size of aggregated packet in generic |
1973 | * receive offload (GRO) |
1974 | * |
1975 | * @dev_addr_shadow: Copy of @dev_addr to catch direct writes. |
1976 | * @linkwatch_dev_tracker: refcount tracker used by linkwatch. |
1977 | * @watchdog_dev_tracker: refcount tracker used by watchdog. |
1978 | * @dev_registered_tracker: tracker for reference held while |
1979 | * registered |
1980 | * @offload_xstats_l3: L3 HW stats for this netdevice. |
1981 | * |
1982 | * FIXME: cleanup struct net_device such that network protocol info |
1983 | * moves out. |
1984 | */ |
1985 | |
1986 | struct net_device { |
1987 | char name[IFNAMSIZ]; |
1988 | struct netdev_name_node *name_node; |
1989 | struct dev_ifalias __rcu *ifalias; |
1990 | /* |
1991 | * I/O specific fields |
1992 | * FIXME: Merge these and struct ifmap into one |
1993 | */ |
1994 | unsigned long mem_end; |
1995 | unsigned long mem_start; |
1996 | unsigned long base_addr; |
1997 | |
1998 | /* |
1999 | * Some hardware also needs these fields (state,dev_list, |
2000 | * napi_list,unreg_list,close_list) but they are not |
2001 | * part of the usual set specified in Space.c. |
2002 | */ |
2003 | |
2004 | unsigned long state; |
2005 | |
2006 | struct list_head dev_list; |
2007 | struct list_head napi_list; |
2008 | struct list_head unreg_list; |
2009 | struct list_head close_list; |
2010 | struct list_head ptype_all; |
2011 | struct list_head ptype_specific; |
2012 | |
2013 | struct { |
2014 | struct list_head upper; |
2015 | struct list_head lower; |
2016 | } adj_list; |
2017 | |
2018 | /* Read-mostly cache-line for fast-path access */ |
2019 | unsigned int flags; |
2020 | unsigned long long priv_flags; |
2021 | const struct net_device_ops *netdev_ops; |
2022 | int ifindex; |
2023 | unsigned short gflags; |
2024 | unsigned short ; |
2025 | |
2026 | /* Note : dev->mtu is often read without holding a lock. |
2027 | * Writers usually hold RTNL. |
2028 | * It is recommended to use READ_ONCE() to annotate the reads, |
2029 | * and to use WRITE_ONCE() to annotate the writes. |
2030 | */ |
2031 | unsigned int mtu; |
2032 | unsigned short needed_headroom; |
2033 | unsigned short needed_tailroom; |
2034 | |
2035 | netdev_features_t features; |
2036 | netdev_features_t hw_features; |
2037 | netdev_features_t wanted_features; |
2038 | netdev_features_t vlan_features; |
2039 | netdev_features_t hw_enc_features; |
2040 | netdev_features_t mpls_features; |
2041 | netdev_features_t gso_partial_features; |
2042 | |
2043 | unsigned int min_mtu; |
2044 | unsigned int max_mtu; |
2045 | unsigned short type; |
2046 | unsigned char ; |
2047 | unsigned char name_assign_type; |
2048 | |
2049 | int group; |
2050 | |
2051 | struct net_device_stats stats; /* not used by modern drivers */ |
2052 | |
2053 | struct net_device_core_stats __percpu *core_stats; |
2054 | |
2055 | /* Stats to monitor link on/off, flapping */ |
2056 | atomic_t carrier_up_count; |
2057 | atomic_t carrier_down_count; |
2058 | |
2059 | #ifdef CONFIG_WIRELESS_EXT |
2060 | const struct iw_handler_def *wireless_handlers; |
2061 | struct iw_public_data *wireless_data; |
2062 | #endif |
2063 | const struct ethtool_ops *ethtool_ops; |
2064 | #ifdef CONFIG_NET_L3_MASTER_DEV |
2065 | const struct l3mdev_ops *l3mdev_ops; |
2066 | #endif |
2067 | #if IS_ENABLED(CONFIG_IPV6) |
2068 | const struct ndisc_ops *ndisc_ops; |
2069 | #endif |
2070 | |
2071 | #ifdef CONFIG_XFRM_OFFLOAD |
2072 | const struct xfrmdev_ops *xfrmdev_ops; |
2073 | #endif |
2074 | |
2075 | #if IS_ENABLED(CONFIG_TLS_DEVICE) |
2076 | const struct tlsdev_ops *tlsdev_ops; |
2077 | #endif |
2078 | |
2079 | const struct header_ops *; |
2080 | |
2081 | unsigned char operstate; |
2082 | unsigned char link_mode; |
2083 | |
2084 | unsigned char if_port; |
2085 | unsigned char dma; |
2086 | |
2087 | /* Interface address info. */ |
2088 | unsigned char perm_addr[MAX_ADDR_LEN]; |
2089 | unsigned char addr_assign_type; |
2090 | unsigned char addr_len; |
2091 | unsigned char upper_level; |
2092 | unsigned char lower_level; |
2093 | |
2094 | unsigned short neigh_priv_len; |
2095 | unsigned short dev_id; |
2096 | unsigned short dev_port; |
2097 | unsigned short padded; |
2098 | |
2099 | spinlock_t addr_list_lock; |
2100 | int irq; |
2101 | |
2102 | struct netdev_hw_addr_list uc; |
2103 | struct netdev_hw_addr_list mc; |
2104 | struct netdev_hw_addr_list dev_addrs; |
2105 | |
2106 | #ifdef CONFIG_SYSFS |
2107 | struct kset *queues_kset; |
2108 | #endif |
2109 | #ifdef CONFIG_LOCKDEP |
2110 | struct list_head unlink_list; |
2111 | #endif |
2112 | unsigned int promiscuity; |
2113 | unsigned int allmulti; |
2114 | bool uc_promisc; |
2115 | #ifdef CONFIG_LOCKDEP |
2116 | unsigned char nested_level; |
2117 | #endif |
2118 | |
2119 | |
2120 | /* Protocol-specific pointers */ |
2121 | |
2122 | struct in_device __rcu *ip_ptr; |
2123 | struct inet6_dev __rcu *ip6_ptr; |
2124 | #if IS_ENABLED(CONFIG_VLAN_8021Q) |
2125 | struct vlan_info __rcu *vlan_info; |
2126 | #endif |
2127 | #if IS_ENABLED(CONFIG_NET_DSA) |
2128 | struct dsa_port *dsa_ptr; |
2129 | #endif |
2130 | #if IS_ENABLED(CONFIG_TIPC) |
2131 | struct tipc_bearer __rcu *tipc_ptr; |
2132 | #endif |
2133 | #if IS_ENABLED(CONFIG_ATALK) |
2134 | void *atalk_ptr; |
2135 | #endif |
2136 | #if IS_ENABLED(CONFIG_DECNET) |
2137 | struct dn_dev __rcu *dn_ptr; |
2138 | #endif |
2139 | #if IS_ENABLED(CONFIG_AX25) |
2140 | void *ax25_ptr; |
2141 | #endif |
2142 | #if IS_ENABLED(CONFIG_CFG80211) |
2143 | struct wireless_dev *ieee80211_ptr; |
2144 | #endif |
2145 | #if IS_ENABLED(CONFIG_IEEE802154) || IS_ENABLED(CONFIG_6LOWPAN) |
2146 | struct wpan_dev *ieee802154_ptr; |
2147 | #endif |
2148 | #if IS_ENABLED(CONFIG_MPLS_ROUTING) |
2149 | struct mpls_dev __rcu *mpls_ptr; |
2150 | #endif |
2151 | #if IS_ENABLED(CONFIG_MCTP) |
2152 | struct mctp_dev __rcu *mctp_ptr; |
2153 | #endif |
2154 | |
2155 | /* |
2156 | * Cache lines mostly used on receive path (including eth_type_trans()) |
2157 | */ |
2158 | /* Interface address info used in eth_type_trans() */ |
2159 | const unsigned char *dev_addr; |
2160 | |
2161 | struct netdev_rx_queue *_rx; |
2162 | unsigned int num_rx_queues; |
2163 | unsigned int real_num_rx_queues; |
2164 | |
2165 | struct bpf_prog __rcu *xdp_prog; |
2166 | unsigned long gro_flush_timeout; |
2167 | int napi_defer_hard_irqs; |
2168 | #define GRO_LEGACY_MAX_SIZE 65536u |
2169 | /* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), |
2170 | * and shinfo->gso_segs is a 16bit field. |
2171 | */ |
2172 | #define GRO_MAX_SIZE (8 * 65535u) |
2173 | unsigned int gro_max_size; |
2174 | rx_handler_func_t __rcu *rx_handler; |
2175 | void __rcu *rx_handler_data; |
2176 | |
2177 | #ifdef CONFIG_NET_CLS_ACT |
2178 | struct mini_Qdisc __rcu *miniq_ingress; |
2179 | #endif |
2180 | struct netdev_queue __rcu *ingress_queue; |
2181 | #ifdef CONFIG_NETFILTER_INGRESS |
2182 | struct nf_hook_entries __rcu *nf_hooks_ingress; |
2183 | #endif |
2184 | |
2185 | unsigned char broadcast[MAX_ADDR_LEN]; |
2186 | #ifdef CONFIG_RFS_ACCEL |
2187 | struct cpu_rmap *rx_cpu_rmap; |
2188 | #endif |
2189 | struct hlist_node index_hlist; |
2190 | |
2191 | /* |
2192 | * Cache lines mostly used on transmit path |
2193 | */ |
2194 | struct netdev_queue *_tx ____cacheline_aligned_in_smp; |
2195 | unsigned int num_tx_queues; |
2196 | unsigned int real_num_tx_queues; |
2197 | struct Qdisc __rcu *qdisc; |
2198 | unsigned int tx_queue_len; |
2199 | spinlock_t tx_global_lock; |
2200 | |
2201 | struct xdp_dev_bulk_queue __percpu *xdp_bulkq; |
2202 | |
2203 | #ifdef CONFIG_XPS |
2204 | struct xps_dev_maps __rcu *xps_maps[XPS_MAPS_MAX]; |
2205 | #endif |
2206 | #ifdef CONFIG_NET_CLS_ACT |
2207 | struct mini_Qdisc __rcu *miniq_egress; |
2208 | #endif |
2209 | #ifdef CONFIG_NETFILTER_EGRESS |
2210 | struct nf_hook_entries __rcu *nf_hooks_egress; |
2211 | #endif |
2212 | |
2213 | #ifdef CONFIG_NET_SCHED |
2214 | DECLARE_HASHTABLE (qdisc_hash, 4); |
2215 | #endif |
2216 | /* These may be needed for future network-power-down code. */ |
2217 | struct timer_list watchdog_timer; |
2218 | int watchdog_timeo; |
2219 | |
2220 | u32 proto_down_reason; |
2221 | |
2222 | struct list_head todo_list; |
2223 | |
2224 | #ifdef CONFIG_PCPU_DEV_REFCNT |
2225 | int __percpu *pcpu_refcnt; |
2226 | #else |
2227 | refcount_t dev_refcnt; |
2228 | #endif |
2229 | struct ref_tracker_dir refcnt_tracker; |
2230 | |
2231 | struct list_head link_watch_list; |
2232 | |
2233 | enum { NETREG_UNINITIALIZED=0, |
2234 | NETREG_REGISTERED, /* completed register_netdevice */ |
2235 | NETREG_UNREGISTERING, /* called unregister_netdevice */ |
2236 | NETREG_UNREGISTERED, /* completed unregister todo */ |
2237 | NETREG_RELEASED, /* called free_netdev */ |
2238 | NETREG_DUMMY, /* dummy device for NAPI poll */ |
2239 | } reg_state:8; |
2240 | |
2241 | bool dismantle; |
2242 | |
2243 | enum { |
2244 | RTNL_LINK_INITIALIZED, |
2245 | RTNL_LINK_INITIALIZING, |
2246 | } rtnl_link_state:16; |
2247 | |
2248 | bool needs_free_netdev; |
2249 | void (*priv_destructor)(struct net_device *dev); |
2250 | |
2251 | #ifdef CONFIG_NETPOLL |
2252 | struct netpoll_info __rcu *npinfo; |
2253 | #endif |
2254 | |
2255 | possible_net_t nd_net; |
2256 | |
2257 | /* mid-layer private */ |
2258 | void *ml_priv; |
2259 | enum netdev_ml_priv_type ml_priv_type; |
2260 | |
2261 | union { |
2262 | struct pcpu_lstats __percpu *lstats; |
2263 | struct pcpu_sw_netstats __percpu *tstats; |
2264 | struct pcpu_dstats __percpu *dstats; |
2265 | }; |
2266 | |
2267 | #if IS_ENABLED(CONFIG_GARP) |
2268 | struct garp_port __rcu *garp_port; |
2269 | #endif |
2270 | #if IS_ENABLED(CONFIG_MRP) |
2271 | struct mrp_port __rcu *mrp_port; |
2272 | #endif |
2273 | #if IS_ENABLED(CONFIG_NET_DROP_MONITOR) |
2274 | struct dm_hw_stat_delta __rcu *dm_private; |
2275 | #endif |
2276 | struct device dev; |
2277 | const struct attribute_group *sysfs_groups[4]; |
2278 | const struct attribute_group *sysfs_rx_queue_group; |
2279 | |
2280 | const struct rtnl_link_ops *rtnl_link_ops; |
2281 | |
2282 | /* for setting kernel sock attribute on TCP connection setup */ |
2283 | #define GSO_MAX_SEGS 65535u |
2284 | #define GSO_LEGACY_MAX_SIZE 65536u |
2285 | /* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE), |
2286 | * and shinfo->gso_segs is a 16bit field. |
2287 | */ |
2288 | #define GSO_MAX_SIZE (8 * GSO_MAX_SEGS) |
2289 | |
2290 | unsigned int gso_max_size; |
2291 | #define TSO_LEGACY_MAX_SIZE 65536 |
2292 | #define TSO_MAX_SIZE UINT_MAX |
2293 | unsigned int tso_max_size; |
2294 | u16 gso_max_segs; |
2295 | #define TSO_MAX_SEGS U16_MAX |
2296 | u16 tso_max_segs; |
2297 | |
2298 | #ifdef CONFIG_DCB |
2299 | const struct dcbnl_rtnl_ops *dcbnl_ops; |
2300 | #endif |
2301 | s16 num_tc; |
2302 | struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE]; |
2303 | u8 prio_tc_map[TC_BITMASK + 1]; |
2304 | |
2305 | #if IS_ENABLED(CONFIG_FCOE) |
2306 | unsigned int fcoe_ddp_xid; |
2307 | #endif |
2308 | #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) |
2309 | struct netprio_map __rcu *priomap; |
2310 | #endif |
2311 | struct phy_device *phydev; |
2312 | struct sfp_bus *sfp_bus; |
2313 | struct lock_class_key *qdisc_tx_busylock; |
2314 | bool proto_down; |
2315 | unsigned wol_enabled:1; |
2316 | unsigned threaded:1; |
2317 | |
2318 | struct list_head net_notifier_list; |
2319 | |
2320 | #if IS_ENABLED(CONFIG_MACSEC) |
2321 | /* MACsec management functions */ |
2322 | const struct macsec_ops *macsec_ops; |
2323 | #endif |
2324 | const struct udp_tunnel_nic_info *udp_tunnel_nic_info; |
2325 | struct udp_tunnel_nic *udp_tunnel_nic; |
2326 | |
2327 | /* protected by rtnl_lock */ |
2328 | struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE]; |
2329 | |
2330 | u8 dev_addr_shadow[MAX_ADDR_LEN]; |
2331 | netdevice_tracker linkwatch_dev_tracker; |
2332 | netdevice_tracker watchdog_dev_tracker; |
2333 | netdevice_tracker dev_registered_tracker; |
2334 | struct rtnl_hw_stats64 *offload_xstats_l3; |
2335 | }; |
2336 | #define to_net_dev(d) container_of(d, struct net_device, dev) |
2337 | |
2338 | static inline bool netif_elide_gro(const struct net_device *dev) |
2339 | { |
2340 | if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog) |
2341 | return true; |
2342 | return false; |
2343 | } |
2344 | |
2345 | #define NETDEV_ALIGN 32 |
2346 | |
2347 | static inline |
2348 | int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio) |
2349 | { |
2350 | return dev->prio_tc_map[prio & TC_BITMASK]; |
2351 | } |
2352 | |
2353 | static inline |
2354 | int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc) |
2355 | { |
2356 | if (tc >= dev->num_tc) |
2357 | return -EINVAL; |
2358 | |
2359 | dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK; |
2360 | return 0; |
2361 | } |
2362 | |
2363 | int netdev_txq_to_tc(struct net_device *dev, unsigned int txq); |
2364 | void netdev_reset_tc(struct net_device *dev); |
2365 | int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset); |
2366 | int netdev_set_num_tc(struct net_device *dev, u8 num_tc); |
2367 | |
2368 | static inline |
2369 | int netdev_get_num_tc(struct net_device *dev) |
2370 | { |
2371 | return dev->num_tc; |
2372 | } |
2373 | |
2374 | static inline void net_prefetch(void *p) |
2375 | { |
2376 | prefetch(p); |
2377 | #if L1_CACHE_BYTES < 128 |
2378 | prefetch((u8 *)p + L1_CACHE_BYTES); |
2379 | #endif |
2380 | } |
2381 | |
2382 | static inline void net_prefetchw(void *p) |
2383 | { |
2384 | prefetchw(p); |
2385 | #if L1_CACHE_BYTES < 128 |
2386 | prefetchw((u8 *)p + L1_CACHE_BYTES); |
2387 | #endif |
2388 | } |
2389 | |
2390 | void netdev_unbind_sb_channel(struct net_device *dev, |
2391 | struct net_device *sb_dev); |
2392 | int netdev_bind_sb_channel_queue(struct net_device *dev, |
2393 | struct net_device *sb_dev, |
2394 | u8 tc, u16 count, u16 offset); |
2395 | int netdev_set_sb_channel(struct net_device *dev, u16 channel); |
2396 | static inline int netdev_get_sb_channel(struct net_device *dev) |
2397 | { |
2398 | return max_t(int, -dev->num_tc, 0); |
2399 | } |
2400 | |
2401 | static inline |
2402 | struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev, |
2403 | unsigned int index) |
2404 | { |
2405 | return &dev->_tx[index]; |
2406 | } |
2407 | |
2408 | static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev, |
2409 | const struct sk_buff *skb) |
2410 | { |
2411 | return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); |
2412 | } |
2413 | |
2414 | static inline void netdev_for_each_tx_queue(struct net_device *dev, |
2415 | void (*f)(struct net_device *, |
2416 | struct netdev_queue *, |
2417 | void *), |
2418 | void *arg) |
2419 | { |
2420 | unsigned int i; |
2421 | |
2422 | for (i = 0; i < dev->num_tx_queues; i++) |
2423 | f(dev, &dev->_tx[i], arg); |
2424 | } |
2425 | |
2426 | #define netdev_lockdep_set_classes(dev) \ |
2427 | { \ |
2428 | static struct lock_class_key qdisc_tx_busylock_key; \ |
2429 | static struct lock_class_key qdisc_xmit_lock_key; \ |
2430 | static struct lock_class_key dev_addr_list_lock_key; \ |
2431 | unsigned int i; \ |
2432 | \ |
2433 | (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \ |
2434 | lockdep_set_class(&(dev)->addr_list_lock, \ |
2435 | &dev_addr_list_lock_key); \ |
2436 | for (i = 0; i < (dev)->num_tx_queues; i++) \ |
2437 | lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \ |
2438 | &qdisc_xmit_lock_key); \ |
2439 | } |
2440 | |
2441 | u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb, |
2442 | struct net_device *sb_dev); |
2443 | struct netdev_queue *netdev_core_pick_tx(struct net_device *dev, |
2444 | struct sk_buff *skb, |
2445 | struct net_device *sb_dev); |
2446 | |
2447 | /* returns the headroom that the master device needs to take in account |
2448 | * when forwarding to this dev |
2449 | */ |
2450 | static inline unsigned netdev_get_fwd_headroom(struct net_device *dev) |
2451 | { |
2452 | return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom; |
2453 | } |
2454 | |
2455 | static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr) |
2456 | { |
2457 | if (dev->netdev_ops->ndo_set_rx_headroom) |
2458 | dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr); |
2459 | } |
2460 | |
2461 | /* set the device rx headroom to the dev's default */ |
2462 | static inline void netdev_reset_rx_headroom(struct net_device *dev) |
2463 | { |
2464 | netdev_set_rx_headroom(dev, -1); |
2465 | } |
2466 | |
2467 | static inline void *netdev_get_ml_priv(struct net_device *dev, |
2468 | enum netdev_ml_priv_type type) |
2469 | { |
2470 | if (dev->ml_priv_type != type) |
2471 | return NULL; |
2472 | |
2473 | return dev->ml_priv; |
2474 | } |
2475 | |
2476 | static inline void netdev_set_ml_priv(struct net_device *dev, |
2477 | void *ml_priv, |
2478 | enum netdev_ml_priv_type type) |
2479 | { |
2480 | WARN(dev->ml_priv_type && dev->ml_priv_type != type, |
2481 | "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n" , |
2482 | dev->ml_priv_type, type); |
2483 | WARN(!dev->ml_priv_type && dev->ml_priv, |
2484 | "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n" ); |
2485 | |
2486 | dev->ml_priv = ml_priv; |
2487 | dev->ml_priv_type = type; |
2488 | } |
2489 | |
2490 | /* |
2491 | * Net namespace inlines |
2492 | */ |
2493 | static inline |
2494 | struct net *dev_net(const struct net_device *dev) |
2495 | { |
2496 | return read_pnet(&dev->nd_net); |
2497 | } |
2498 | |
2499 | static inline |
2500 | void dev_net_set(struct net_device *dev, struct net *net) |
2501 | { |
2502 | write_pnet(&dev->nd_net, net); |
2503 | } |
2504 | |
2505 | /** |
2506 | * netdev_priv - access network device private data |
2507 | * @dev: network device |
2508 | * |
2509 | * Get network device private data |
2510 | */ |
2511 | static inline void *netdev_priv(const struct net_device *dev) |
2512 | { |
2513 | return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN); |
2514 | } |
2515 | |
2516 | /* Set the sysfs physical device reference for the network logical device |
2517 | * if set prior to registration will cause a symlink during initialization. |
2518 | */ |
2519 | #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev)) |
2520 | |
2521 | /* Set the sysfs device type for the network logical device to allow |
2522 | * fine-grained identification of different network device types. For |
2523 | * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc. |
2524 | */ |
2525 | #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype)) |
2526 | |
2527 | /* Default NAPI poll() weight |
2528 | * Device drivers are strongly advised to not use bigger value |
2529 | */ |
2530 | #define NAPI_POLL_WEIGHT 64 |
2531 | |
2532 | void netif_napi_add_weight(struct net_device *dev, struct napi_struct *napi, |
2533 | int (*poll)(struct napi_struct *, int), int weight); |
2534 | |
2535 | /** |
2536 | * netif_napi_add() - initialize a NAPI context |
2537 | * @dev: network device |
2538 | * @napi: NAPI context |
2539 | * @poll: polling function |
2540 | * @weight: default weight |
2541 | * |
2542 | * netif_napi_add() must be used to initialize a NAPI context prior to calling |
2543 | * *any* of the other NAPI-related functions. |
2544 | */ |
2545 | static inline void |
2546 | netif_napi_add(struct net_device *dev, struct napi_struct *napi, |
2547 | int (*poll)(struct napi_struct *, int), int weight) |
2548 | { |
2549 | netif_napi_add_weight(dev, napi, poll, weight); |
2550 | } |
2551 | |
2552 | static inline void |
2553 | netif_napi_add_tx_weight(struct net_device *dev, |
2554 | struct napi_struct *napi, |
2555 | int (*poll)(struct napi_struct *, int), |
2556 | int weight) |
2557 | { |
2558 | set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state); |
2559 | netif_napi_add_weight(dev, napi, poll, weight); |
2560 | } |
2561 | |
2562 | #define netif_tx_napi_add netif_napi_add_tx_weight |
2563 | |
2564 | /** |
2565 | * netif_napi_add_tx() - initialize a NAPI context to be used for Tx only |
2566 | * @dev: network device |
2567 | * @napi: NAPI context |
2568 | * @poll: polling function |
2569 | * |
2570 | * This variant of netif_napi_add() should be used from drivers using NAPI |
2571 | * to exclusively poll a TX queue. |
2572 | * This will avoid we add it into napi_hash[], thus polluting this hash table. |
2573 | */ |
2574 | static inline void netif_napi_add_tx(struct net_device *dev, |
2575 | struct napi_struct *napi, |
2576 | int (*poll)(struct napi_struct *, int)) |
2577 | { |
2578 | netif_napi_add_tx_weight(dev, napi, poll, NAPI_POLL_WEIGHT); |
2579 | } |
2580 | |
2581 | /** |
2582 | * __netif_napi_del - remove a NAPI context |
2583 | * @napi: NAPI context |
2584 | * |
2585 | * Warning: caller must observe RCU grace period before freeing memory |
2586 | * containing @napi. Drivers might want to call this helper to combine |
2587 | * all the needed RCU grace periods into a single one. |
2588 | */ |
2589 | void __netif_napi_del(struct napi_struct *napi); |
2590 | |
2591 | /** |
2592 | * netif_napi_del - remove a NAPI context |
2593 | * @napi: NAPI context |
2594 | * |
2595 | * netif_napi_del() removes a NAPI context from the network device NAPI list |
2596 | */ |
2597 | static inline void netif_napi_del(struct napi_struct *napi) |
2598 | { |
2599 | __netif_napi_del(napi); |
2600 | synchronize_net(); |
2601 | } |
2602 | |
2603 | struct packet_type { |
2604 | __be16 type; /* This is really htons(ether_type). */ |
2605 | bool ignore_outgoing; |
2606 | struct net_device *dev; /* NULL is wildcarded here */ |
2607 | netdevice_tracker dev_tracker; |
2608 | int (*func) (struct sk_buff *, |
2609 | struct net_device *, |
2610 | struct packet_type *, |
2611 | struct net_device *); |
2612 | void (*list_func) (struct list_head *, |
2613 | struct packet_type *, |
2614 | struct net_device *); |
2615 | bool (*id_match)(struct packet_type *ptype, |
2616 | struct sock *sk); |
2617 | struct net *af_packet_net; |
2618 | void *af_packet_priv; |
2619 | struct list_head list; |
2620 | }; |
2621 | |
2622 | struct offload_callbacks { |
2623 | struct sk_buff *(*gso_segment)(struct sk_buff *skb, |
2624 | netdev_features_t features); |
2625 | struct sk_buff *(*gro_receive)(struct list_head *head, |
2626 | struct sk_buff *skb); |
2627 | int (*gro_complete)(struct sk_buff *skb, int nhoff); |
2628 | }; |
2629 | |
2630 | struct packet_offload { |
2631 | __be16 type; /* This is really htons(ether_type). */ |
2632 | u16 priority; |
2633 | struct offload_callbacks callbacks; |
2634 | struct list_head list; |
2635 | }; |
2636 | |
2637 | /* often modified stats are per-CPU, other are shared (netdev->stats) */ |
2638 | struct pcpu_sw_netstats { |
2639 | u64_stats_t rx_packets; |
2640 | u64_stats_t rx_bytes; |
2641 | u64_stats_t tx_packets; |
2642 | u64_stats_t tx_bytes; |
2643 | struct u64_stats_sync syncp; |
2644 | } __aligned(4 * sizeof(u64)); |
2645 | |
2646 | struct pcpu_lstats { |
2647 | u64_stats_t packets; |
2648 | u64_stats_t bytes; |
2649 | struct u64_stats_sync syncp; |
2650 | } __aligned(2 * sizeof(u64)); |
2651 | |
2652 | void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes); |
2653 | |
2654 | static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len) |
2655 | { |
2656 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); |
2657 | |
2658 | u64_stats_update_begin(&tstats->syncp); |
2659 | u64_stats_add(&tstats->rx_bytes, len); |
2660 | u64_stats_inc(&tstats->rx_packets); |
2661 | u64_stats_update_end(&tstats->syncp); |
2662 | } |
2663 | |
2664 | static inline void dev_sw_netstats_tx_add(struct net_device *dev, |
2665 | unsigned int packets, |
2666 | unsigned int len) |
2667 | { |
2668 | struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats); |
2669 | |
2670 | u64_stats_update_begin(&tstats->syncp); |
2671 | u64_stats_add(&tstats->tx_bytes, len); |
2672 | u64_stats_add(&tstats->tx_packets, packets); |
2673 | u64_stats_update_end(&tstats->syncp); |
2674 | } |
2675 | |
2676 | static inline void dev_lstats_add(struct net_device *dev, unsigned int len) |
2677 | { |
2678 | struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats); |
2679 | |
2680 | u64_stats_update_begin(&lstats->syncp); |
2681 | u64_stats_add(&lstats->bytes, len); |
2682 | u64_stats_inc(&lstats->packets); |
2683 | u64_stats_update_end(&lstats->syncp); |
2684 | } |
2685 | |
2686 | #define __netdev_alloc_pcpu_stats(type, gfp) \ |
2687 | ({ \ |
2688 | typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\ |
2689 | if (pcpu_stats) { \ |
2690 | int __cpu; \ |
2691 | for_each_possible_cpu(__cpu) { \ |
2692 | typeof(type) *stat; \ |
2693 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ |
2694 | u64_stats_init(&stat->syncp); \ |
2695 | } \ |
2696 | } \ |
2697 | pcpu_stats; \ |
2698 | }) |
2699 | |
2700 | #define netdev_alloc_pcpu_stats(type) \ |
2701 | __netdev_alloc_pcpu_stats(type, GFP_KERNEL) |
2702 | |
2703 | #define devm_netdev_alloc_pcpu_stats(dev, type) \ |
2704 | ({ \ |
2705 | typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\ |
2706 | if (pcpu_stats) { \ |
2707 | int __cpu; \ |
2708 | for_each_possible_cpu(__cpu) { \ |
2709 | typeof(type) *stat; \ |
2710 | stat = per_cpu_ptr(pcpu_stats, __cpu); \ |
2711 | u64_stats_init(&stat->syncp); \ |
2712 | } \ |
2713 | } \ |
2714 | pcpu_stats; \ |
2715 | }) |
2716 | |
2717 | enum netdev_lag_tx_type { |
2718 | NETDEV_LAG_TX_TYPE_UNKNOWN, |
2719 | NETDEV_LAG_TX_TYPE_RANDOM, |
2720 | NETDEV_LAG_TX_TYPE_BROADCAST, |
2721 | NETDEV_LAG_TX_TYPE_ROUNDROBIN, |
2722 | NETDEV_LAG_TX_TYPE_ACTIVEBACKUP, |
2723 | NETDEV_LAG_TX_TYPE_HASH, |
2724 | }; |
2725 | |
2726 | enum netdev_lag_hash { |
2727 | NETDEV_LAG_HASH_NONE, |
2728 | NETDEV_LAG_HASH_L2, |
2729 | NETDEV_LAG_HASH_L34, |
2730 | NETDEV_LAG_HASH_L23, |
2731 | NETDEV_LAG_HASH_E23, |
2732 | NETDEV_LAG_HASH_E34, |
2733 | NETDEV_LAG_HASH_VLAN_SRCMAC, |
2734 | NETDEV_LAG_HASH_UNKNOWN, |
2735 | }; |
2736 | |
2737 | struct netdev_lag_upper_info { |
2738 | enum netdev_lag_tx_type tx_type; |
2739 | enum netdev_lag_hash hash_type; |
2740 | }; |
2741 | |
2742 | struct netdev_lag_lower_state_info { |
2743 | u8 link_up : 1, |
2744 | tx_enabled : 1; |
2745 | }; |
2746 | |
2747 | #include <linux/notifier.h> |
2748 | |
2749 | /* netdevice notifier chain. Please remember to update netdev_cmd_to_name() |
2750 | * and the rtnetlink notification exclusion list in rtnetlink_event() when |
2751 | * adding new types. |
2752 | */ |
2753 | enum netdev_cmd { |
2754 | NETDEV_UP = 1, /* For now you can't veto a device up/down */ |
2755 | NETDEV_DOWN, |
2756 | NETDEV_REBOOT, /* Tell a protocol stack a network interface |
2757 | detected a hardware crash and restarted |
2758 | - we can use this eg to kick tcp sessions |
2759 | once done */ |
2760 | NETDEV_CHANGE, /* Notify device state change */ |
2761 | NETDEV_REGISTER, |
2762 | NETDEV_UNREGISTER, |
2763 | NETDEV_CHANGEMTU, /* notify after mtu change happened */ |
2764 | NETDEV_CHANGEADDR, /* notify after the address change */ |
2765 | NETDEV_PRE_CHANGEADDR, /* notify before the address change */ |
2766 | NETDEV_GOING_DOWN, |
2767 | NETDEV_CHANGENAME, |
2768 | NETDEV_FEAT_CHANGE, |
2769 | NETDEV_BONDING_FAILOVER, |
2770 | NETDEV_PRE_UP, |
2771 | NETDEV_PRE_TYPE_CHANGE, |
2772 | NETDEV_POST_TYPE_CHANGE, |
2773 | NETDEV_POST_INIT, |
2774 | NETDEV_RELEASE, |
2775 | NETDEV_NOTIFY_PEERS, |
2776 | NETDEV_JOIN, |
2777 | NETDEV_CHANGEUPPER, |
2778 | NETDEV_RESEND_IGMP, |
2779 | NETDEV_PRECHANGEMTU, /* notify before mtu change happened */ |
2780 | NETDEV_CHANGEINFODATA, |
2781 | NETDEV_BONDING_INFO, |
2782 | NETDEV_PRECHANGEUPPER, |
2783 | NETDEV_CHANGELOWERSTATE, |
2784 | NETDEV_UDP_TUNNEL_PUSH_INFO, |
2785 | NETDEV_UDP_TUNNEL_DROP_INFO, |
2786 | NETDEV_CHANGE_TX_QUEUE_LEN, |
2787 | NETDEV_CVLAN_FILTER_PUSH_INFO, |
2788 | NETDEV_CVLAN_FILTER_DROP_INFO, |
2789 | NETDEV_SVLAN_FILTER_PUSH_INFO, |
2790 | NETDEV_SVLAN_FILTER_DROP_INFO, |
2791 | NETDEV_OFFLOAD_XSTATS_ENABLE, |
2792 | NETDEV_OFFLOAD_XSTATS_DISABLE, |
2793 | NETDEV_OFFLOAD_XSTATS_REPORT_USED, |
2794 | NETDEV_OFFLOAD_XSTATS_REPORT_DELTA, |
2795 | }; |
2796 | const char *netdev_cmd_to_name(enum netdev_cmd cmd); |
2797 | |
2798 | int register_netdevice_notifier(struct notifier_block *nb); |
2799 | int unregister_netdevice_notifier(struct notifier_block *nb); |
2800 | int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb); |
2801 | int unregister_netdevice_notifier_net(struct net *net, |
2802 | struct notifier_block *nb); |
2803 | int register_netdevice_notifier_dev_net(struct net_device *dev, |
2804 | struct notifier_block *nb, |
2805 | struct netdev_net_notifier *nn); |
2806 | int unregister_netdevice_notifier_dev_net(struct net_device *dev, |
2807 | struct notifier_block *nb, |
2808 | struct netdev_net_notifier *nn); |
2809 | |
2810 | struct netdev_notifier_info { |
2811 | struct net_device *dev; |
2812 | struct netlink_ext_ack *extack; |
2813 | }; |
2814 | |
2815 | struct netdev_notifier_info_ext { |
2816 | struct netdev_notifier_info info; /* must be first */ |
2817 | union { |
2818 | u32 mtu; |
2819 | } ext; |
2820 | }; |
2821 | |
2822 | struct netdev_notifier_change_info { |
2823 | struct netdev_notifier_info info; /* must be first */ |
2824 | unsigned int flags_changed; |
2825 | }; |
2826 | |
2827 | struct netdev_notifier_changeupper_info { |
2828 | struct netdev_notifier_info info; /* must be first */ |
2829 | struct net_device *upper_dev; /* new upper dev */ |
2830 | bool master; /* is upper dev master */ |
2831 | bool linking; /* is the notification for link or unlink */ |
2832 | void *upper_info; /* upper dev info */ |
2833 | }; |
2834 | |
2835 | struct netdev_notifier_changelowerstate_info { |
2836 | struct netdev_notifier_info info; /* must be first */ |
2837 | void *lower_state_info; /* is lower dev state */ |
2838 | }; |
2839 | |
2840 | struct netdev_notifier_pre_changeaddr_info { |
2841 | struct netdev_notifier_info info; /* must be first */ |
2842 | const unsigned char *dev_addr; |
2843 | }; |
2844 | |
2845 | enum netdev_offload_xstats_type { |
2846 | NETDEV_OFFLOAD_XSTATS_TYPE_L3 = 1, |
2847 | }; |
2848 | |
2849 | struct netdev_notifier_offload_xstats_info { |
2850 | struct netdev_notifier_info info; /* must be first */ |
2851 | enum netdev_offload_xstats_type type; |
2852 | |
2853 | union { |
2854 | /* NETDEV_OFFLOAD_XSTATS_REPORT_DELTA */ |
2855 | struct netdev_notifier_offload_xstats_rd *report_delta; |
2856 | /* NETDEV_OFFLOAD_XSTATS_REPORT_USED */ |
2857 | struct netdev_notifier_offload_xstats_ru *report_used; |
2858 | }; |
2859 | }; |
2860 | |
2861 | int netdev_offload_xstats_enable(struct net_device *dev, |
2862 | enum netdev_offload_xstats_type type, |
2863 | struct netlink_ext_ack *extack); |
2864 | int netdev_offload_xstats_disable(struct net_device *dev, |
2865 | enum netdev_offload_xstats_type type); |
2866 | bool netdev_offload_xstats_enabled(const struct net_device *dev, |
2867 | enum netdev_offload_xstats_type type); |
2868 | int netdev_offload_xstats_get(struct net_device *dev, |
2869 | enum netdev_offload_xstats_type type, |
2870 | struct rtnl_hw_stats64 *stats, bool *used, |
2871 | struct netlink_ext_ack *extack); |
2872 | void |
2873 | netdev_offload_xstats_report_delta(struct netdev_notifier_offload_xstats_rd *rd, |
2874 | const struct rtnl_hw_stats64 *stats); |
2875 | void |
2876 | netdev_offload_xstats_report_used(struct netdev_notifier_offload_xstats_ru *ru); |
2877 | void netdev_offload_xstats_push_delta(struct net_device *dev, |
2878 | enum netdev_offload_xstats_type type, |
2879 | const struct rtnl_hw_stats64 *stats); |
2880 | |
2881 | static inline void netdev_notifier_info_init(struct netdev_notifier_info *info, |
2882 | struct net_device *dev) |
2883 | { |
2884 | info->dev = dev; |
2885 | info->extack = NULL; |
2886 | } |
2887 | |
2888 | static inline struct net_device * |
2889 | netdev_notifier_info_to_dev(const struct netdev_notifier_info *info) |
2890 | { |
2891 | return info->dev; |
2892 | } |
2893 | |
2894 | static inline struct netlink_ext_ack * |
2895 | netdev_notifier_info_to_extack(const struct netdev_notifier_info *info) |
2896 | { |
2897 | return info->extack; |
2898 | } |
2899 | |
2900 | int call_netdevice_notifiers(unsigned long val, struct net_device *dev); |
2901 | |
2902 | |
2903 | extern rwlock_t dev_base_lock; /* Device list lock */ |
2904 | |
2905 | #define for_each_netdev(net, d) \ |
2906 | list_for_each_entry(d, &(net)->dev_base_head, dev_list) |
2907 | #define for_each_netdev_reverse(net, d) \ |
2908 | list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list) |
2909 | #define for_each_netdev_rcu(net, d) \ |
2910 | list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list) |
2911 | #define for_each_netdev_safe(net, d, n) \ |
2912 | list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list) |
2913 | #define for_each_netdev_continue(net, d) \ |
2914 | list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list) |
2915 | #define for_each_netdev_continue_reverse(net, d) \ |
2916 | list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \ |
2917 | dev_list) |
2918 | #define for_each_netdev_continue_rcu(net, d) \ |
2919 | list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list) |
2920 | #define for_each_netdev_in_bond_rcu(bond, slave) \ |
2921 | for_each_netdev_rcu(&init_net, slave) \ |
2922 | if (netdev_master_upper_dev_get_rcu(slave) == (bond)) |
2923 | #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list) |
2924 | |
2925 | static inline struct net_device *next_net_device(struct net_device *dev) |
2926 | { |
2927 | struct list_head *lh; |
2928 | struct net *net; |
2929 | |
2930 | net = dev_net(dev); |
2931 | lh = dev->dev_list.next; |
2932 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2933 | } |
2934 | |
2935 | static inline struct net_device *next_net_device_rcu(struct net_device *dev) |
2936 | { |
2937 | struct list_head *lh; |
2938 | struct net *net; |
2939 | |
2940 | net = dev_net(dev); |
2941 | lh = rcu_dereference(list_next_rcu(&dev->dev_list)); |
2942 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2943 | } |
2944 | |
2945 | static inline struct net_device *first_net_device(struct net *net) |
2946 | { |
2947 | return list_empty(&net->dev_base_head) ? NULL : |
2948 | net_device_entry(net->dev_base_head.next); |
2949 | } |
2950 | |
2951 | static inline struct net_device *first_net_device_rcu(struct net *net) |
2952 | { |
2953 | struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head)); |
2954 | |
2955 | return lh == &net->dev_base_head ? NULL : net_device_entry(lh); |
2956 | } |
2957 | |
2958 | int netdev_boot_setup_check(struct net_device *dev); |
2959 | struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type, |
2960 | const char *hwaddr); |
2961 | struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type); |
2962 | void dev_add_pack(struct packet_type *pt); |
2963 | void dev_remove_pack(struct packet_type *pt); |
2964 | void __dev_remove_pack(struct packet_type *pt); |
2965 | void dev_add_offload(struct packet_offload *po); |
2966 | void dev_remove_offload(struct packet_offload *po); |
2967 | |
2968 | int dev_get_iflink(const struct net_device *dev); |
2969 | int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb); |
2970 | int dev_fill_forward_path(const struct net_device *dev, const u8 *daddr, |
2971 | struct net_device_path_stack *stack); |
2972 | struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags, |
2973 | unsigned short mask); |
2974 | struct net_device *dev_get_by_name(struct net *net, const char *name); |
2975 | struct net_device *dev_get_by_name_rcu(struct net *net, const char *name); |
2976 | struct net_device *__dev_get_by_name(struct net *net, const char *name); |
2977 | bool netdev_name_in_use(struct net *net, const char *name); |
2978 | int dev_alloc_name(struct net_device *dev, const char *name); |
2979 | int dev_open(struct net_device *dev, struct netlink_ext_ack *extack); |
2980 | void dev_close(struct net_device *dev); |
2981 | void dev_close_many(struct list_head *head, bool unlink); |
2982 | void dev_disable_lro(struct net_device *dev); |
2983 | int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb); |
2984 | u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb, |
2985 | struct net_device *sb_dev); |
2986 | u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb, |
2987 | struct net_device *sb_dev); |
2988 | |
2989 | int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev); |
2990 | int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id); |
2991 | |
2992 | static inline int dev_queue_xmit(struct sk_buff *skb) |
2993 | { |
2994 | return __dev_queue_xmit(skb, NULL); |
2995 | } |
2996 | |
2997 | static inline int dev_queue_xmit_accel(struct sk_buff *skb, |
2998 | struct net_device *sb_dev) |
2999 | { |
3000 | return __dev_queue_xmit(skb, sb_dev); |
3001 | } |
3002 | |
3003 | static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id) |
3004 | { |
3005 | int ret; |
3006 | |
3007 | ret = __dev_direct_xmit(skb, queue_id); |
3008 | if (!dev_xmit_complete(ret)) |
3009 | kfree_skb(skb); |
3010 | return ret; |
3011 | } |
3012 | |
3013 | int register_netdevice(struct net_device *dev); |
3014 | void unregister_netdevice_queue(struct net_device *dev, struct list_head *head); |
3015 | void unregister_netdevice_many(struct list_head *head); |
3016 | static inline void unregister_netdevice(struct net_device *dev) |
3017 | { |
3018 | unregister_netdevice_queue(dev, NULL); |
3019 | } |
3020 | |
3021 | int netdev_refcnt_read(const struct net_device *dev); |
3022 | void free_netdev(struct net_device *dev); |
3023 | void netdev_freemem(struct net_device *dev); |
3024 | int init_dummy_netdev(struct net_device *dev); |
3025 | |
3026 | struct net_device *netdev_get_xmit_slave(struct net_device *dev, |
3027 | struct sk_buff *skb, |
3028 | bool all_slaves); |
3029 | struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, |
3030 | struct sock *sk); |
3031 | struct net_device *dev_get_by_index(struct net *net, int ifindex); |
3032 | struct net_device *__dev_get_by_index(struct net *net, int ifindex); |
3033 | struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); |
3034 | struct net_device *dev_get_by_napi_id(unsigned int napi_id); |
3035 | int dev_restart(struct net_device *dev); |
3036 | |
3037 | |
3038 | static inline int (struct sk_buff *skb, struct net_device *dev, |
3039 | unsigned short type, |
3040 | const void *daddr, const void *saddr, |
3041 | unsigned int len) |
3042 | { |
3043 | if (!dev->header_ops || !dev->header_ops->create) |
3044 | return 0; |
3045 | |
3046 | return dev->header_ops->create(skb, dev, type, daddr, saddr, len); |
3047 | } |
3048 | |
3049 | static inline int (const struct sk_buff *skb, |
3050 | unsigned char *haddr) |
3051 | { |
3052 | const struct net_device *dev = skb->dev; |
3053 | |
3054 | if (!dev->header_ops || !dev->header_ops->parse) |
3055 | return 0; |
3056 | return dev->header_ops->parse(skb, haddr); |
3057 | } |
3058 | |
3059 | static inline __be16 (const struct sk_buff *skb) |
3060 | { |
3061 | const struct net_device *dev = skb->dev; |
3062 | |
3063 | if (!dev->header_ops || !dev->header_ops->parse_protocol) |
3064 | return 0; |
3065 | return dev->header_ops->parse_protocol(skb); |
3066 | } |
3067 | |
3068 | /* ll_header must have at least hard_header_len allocated */ |
3069 | static inline bool (const struct net_device *dev, |
3070 | char *, int len) |
3071 | { |
3072 | if (likely(len >= dev->hard_header_len)) |
3073 | return true; |
3074 | if (len < dev->min_header_len) |
3075 | return false; |
3076 | |
3077 | if (capable(CAP_SYS_RAWIO)) { |
3078 | memset(ll_header + len, 0, dev->hard_header_len - len); |
3079 | return true; |
3080 | } |
3081 | |
3082 | if (dev->header_ops && dev->header_ops->validate) |
3083 | return dev->header_ops->validate(ll_header, len); |
3084 | |
3085 | return false; |
3086 | } |
3087 | |
3088 | static inline bool (const struct net_device *dev) |
3089 | { |
3090 | return dev->header_ops && dev->header_ops->create; |
3091 | } |
3092 | |
3093 | /* |
3094 | * Incoming packets are placed on per-CPU queues |
3095 | */ |
3096 | struct softnet_data { |
3097 | struct list_head poll_list; |
3098 | struct sk_buff_head process_queue; |
3099 | |
3100 | /* stats */ |
3101 | unsigned int processed; |
3102 | unsigned int time_squeeze; |
3103 | unsigned int received_rps; |
3104 | #ifdef CONFIG_RPS |
3105 | struct softnet_data *rps_ipi_list; |
3106 | #endif |
3107 | #ifdef CONFIG_NET_FLOW_LIMIT |
3108 | struct sd_flow_limit __rcu *flow_limit; |
3109 | #endif |
3110 | struct Qdisc *output_queue; |
3111 | struct Qdisc **output_queue_tailp; |
3112 | struct sk_buff *completion_queue; |
3113 | #ifdef CONFIG_XFRM_OFFLOAD |
3114 | struct sk_buff_head xfrm_backlog; |
3115 | #endif |
3116 | /* written and read only by owning cpu: */ |
3117 | struct { |
3118 | u16 recursion; |
3119 | u8 more; |
3120 | #ifdef CONFIG_NET_EGRESS |
3121 | u8 skip_txqueue; |
3122 | #endif |
3123 | } xmit; |
3124 | #ifdef CONFIG_RPS |
3125 | /* input_queue_head should be written by cpu owning this struct, |
3126 | * and only read by other cpus. Worth using a cache line. |
3127 | */ |
3128 | unsigned int input_queue_head ____cacheline_aligned_in_smp; |
3129 | |
3130 | /* Elements below can be accessed between CPUs for RPS/RFS */ |
3131 | call_single_data_t csd ____cacheline_aligned_in_smp; |
3132 | struct softnet_data *rps_ipi_next; |
3133 | unsigned int cpu; |
3134 | unsigned int input_queue_tail; |
3135 | #endif |
3136 | unsigned int dropped; |
3137 | struct sk_buff_head input_pkt_queue; |
3138 | struct napi_struct backlog; |
3139 | |
3140 | /* Another possibly contended cache line */ |
3141 | spinlock_t defer_lock ____cacheline_aligned_in_smp; |
3142 | int defer_count; |
3143 | int defer_ipi_scheduled; |
3144 | struct sk_buff *defer_list; |
3145 | call_single_data_t defer_csd; |
3146 | }; |
3147 | |
3148 | static inline void input_queue_head_incr(struct softnet_data *sd) |
3149 | { |
3150 | #ifdef CONFIG_RPS |
3151 | sd->input_queue_head++; |
3152 | #endif |
3153 | } |
3154 | |
3155 | static inline void input_queue_tail_incr_save(struct softnet_data *sd, |
3156 | unsigned int *qtail) |
3157 | { |
3158 | #ifdef CONFIG_RPS |
3159 | *qtail = ++sd->input_queue_tail; |
3160 | #endif |
3161 | } |
3162 | |
3163 | DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); |
3164 | |
3165 | static inline int dev_recursion_level(void) |
3166 | { |
3167 | return this_cpu_read(softnet_data.xmit.recursion); |
3168 | } |
3169 | |
3170 | #define XMIT_RECURSION_LIMIT 8 |
3171 | static inline bool dev_xmit_recursion(void) |
3172 | { |
3173 | return unlikely(__this_cpu_read(softnet_data.xmit.recursion) > |
3174 | XMIT_RECURSION_LIMIT); |
3175 | } |
3176 | |
3177 | static inline void dev_xmit_recursion_inc(void) |
3178 | { |
3179 | __this_cpu_inc(softnet_data.xmit.recursion); |
3180 | } |
3181 | |
3182 | static inline void dev_xmit_recursion_dec(void) |
3183 | { |
3184 | __this_cpu_dec(softnet_data.xmit.recursion); |
3185 | } |
3186 | |
3187 | void __netif_schedule(struct Qdisc *q); |
3188 | void netif_schedule_queue(struct netdev_queue *txq); |
3189 | |
3190 | static inline void netif_tx_schedule_all(struct net_device *dev) |
3191 | { |
3192 | unsigned int i; |
3193 | |
3194 | for (i = 0; i < dev->num_tx_queues; i++) |
3195 | netif_schedule_queue(netdev_get_tx_queue(dev, i)); |
3196 | } |
3197 | |
3198 | static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue) |
3199 | { |
3200 | clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
3201 | } |
3202 | |
3203 | /** |
3204 | * netif_start_queue - allow transmit |
3205 | * @dev: network device |
3206 | * |
3207 | * Allow upper layers to call the device hard_start_xmit routine. |
3208 | */ |
3209 | static inline void netif_start_queue(struct net_device *dev) |
3210 | { |
3211 | netif_tx_start_queue(netdev_get_tx_queue(dev, 0)); |
3212 | } |
3213 | |
3214 | static inline void netif_tx_start_all_queues(struct net_device *dev) |
3215 | { |
3216 | unsigned int i; |
3217 | |
3218 | for (i = 0; i < dev->num_tx_queues; i++) { |
3219 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
3220 | netif_tx_start_queue(txq); |
3221 | } |
3222 | } |
3223 | |
3224 | void netif_tx_wake_queue(struct netdev_queue *dev_queue); |
3225 | |
3226 | /** |
3227 | * netif_wake_queue - restart transmit |
3228 | * @dev: network device |
3229 | * |
3230 | * Allow upper layers to call the device hard_start_xmit routine. |
3231 | * Used for flow control when transmit resources are available. |
3232 | */ |
3233 | static inline void netif_wake_queue(struct net_device *dev) |
3234 | { |
3235 | netif_tx_wake_queue(netdev_get_tx_queue(dev, 0)); |
3236 | } |
3237 | |
3238 | static inline void netif_tx_wake_all_queues(struct net_device *dev) |
3239 | { |
3240 | unsigned int i; |
3241 | |
3242 | for (i = 0; i < dev->num_tx_queues; i++) { |
3243 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
3244 | netif_tx_wake_queue(txq); |
3245 | } |
3246 | } |
3247 | |
3248 | static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue) |
3249 | { |
3250 | set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
3251 | } |
3252 | |
3253 | /** |
3254 | * netif_stop_queue - stop transmitted packets |
3255 | * @dev: network device |
3256 | * |
3257 | * Stop upper layers calling the device hard_start_xmit routine. |
3258 | * Used for flow control when transmit resources are unavailable. |
3259 | */ |
3260 | static inline void netif_stop_queue(struct net_device *dev) |
3261 | { |
3262 | netif_tx_stop_queue(netdev_get_tx_queue(dev, 0)); |
3263 | } |
3264 | |
3265 | void netif_tx_stop_all_queues(struct net_device *dev); |
3266 | |
3267 | static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) |
3268 | { |
3269 | return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state); |
3270 | } |
3271 | |
3272 | /** |
3273 | * netif_queue_stopped - test if transmit queue is flowblocked |
3274 | * @dev: network device |
3275 | * |
3276 | * Test if transmit queue on device is currently unable to send. |
3277 | */ |
3278 | static inline bool netif_queue_stopped(const struct net_device *dev) |
3279 | { |
3280 | return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0)); |
3281 | } |
3282 | |
3283 | static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue) |
3284 | { |
3285 | return dev_queue->state & QUEUE_STATE_ANY_XOFF; |
3286 | } |
3287 | |
3288 | static inline bool |
3289 | netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue) |
3290 | { |
3291 | return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN; |
3292 | } |
3293 | |
3294 | static inline bool |
3295 | netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue) |
3296 | { |
3297 | return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN; |
3298 | } |
3299 | |
3300 | /** |
3301 | * netdev_queue_set_dql_min_limit - set dql minimum limit |
3302 | * @dev_queue: pointer to transmit queue |
3303 | * @min_limit: dql minimum limit |
3304 | * |
3305 | * Forces xmit_more() to return true until the minimum threshold |
3306 | * defined by @min_limit is reached (or until the tx queue is |
3307 | * empty). Warning: to be use with care, misuse will impact the |
3308 | * latency. |
3309 | */ |
3310 | static inline void netdev_queue_set_dql_min_limit(struct netdev_queue *dev_queue, |
3311 | unsigned int min_limit) |
3312 | { |
3313 | #ifdef CONFIG_BQL |
3314 | dev_queue->dql.min_limit = min_limit; |
3315 | #endif |
3316 | } |
3317 | |
3318 | /** |
3319 | * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write |
3320 | * @dev_queue: pointer to transmit queue |
3321 | * |
3322 | * BQL enabled drivers might use this helper in their ndo_start_xmit(), |
3323 | * to give appropriate hint to the CPU. |
3324 | */ |
3325 | static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue) |
3326 | { |
3327 | #ifdef CONFIG_BQL |
3328 | prefetchw(&dev_queue->dql.num_queued); |
3329 | #endif |
3330 | } |
3331 | |
3332 | /** |
3333 | * netdev_txq_bql_complete_prefetchw - prefetch bql data for write |
3334 | * @dev_queue: pointer to transmit queue |
3335 | * |
3336 | * BQL enabled drivers might use this helper in their TX completion path, |
3337 | * to give appropriate hint to the CPU. |
3338 | */ |
3339 | static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue) |
3340 | { |
3341 | #ifdef CONFIG_BQL |
3342 | prefetchw(&dev_queue->dql.limit); |
3343 | #endif |
3344 | } |
3345 | |
3346 | static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
3347 | unsigned int bytes) |
3348 | { |
3349 | #ifdef CONFIG_BQL |
3350 | dql_queued(&dev_queue->dql, bytes); |
3351 | |
3352 | if (likely(dql_avail(&dev_queue->dql) >= 0)) |
3353 | return; |
3354 | |
3355 | set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
3356 | |
3357 | /* |
3358 | * The XOFF flag must be set before checking the dql_avail below, |
3359 | * because in netdev_tx_completed_queue we update the dql_completed |
3360 | * before checking the XOFF flag. |
3361 | */ |
3362 | smp_mb(); |
3363 | |
3364 | /* check again in case another CPU has just made room avail */ |
3365 | if (unlikely(dql_avail(&dev_queue->dql) >= 0)) |
3366 | clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state); |
3367 | #endif |
3368 | } |
3369 | |
3370 | /* Variant of netdev_tx_sent_queue() for drivers that are aware |
3371 | * that they should not test BQL status themselves. |
3372 | * We do want to change __QUEUE_STATE_STACK_XOFF only for the last |
3373 | * skb of a batch. |
3374 | * Returns true if the doorbell must be used to kick the NIC. |
3375 | */ |
3376 | static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue, |
3377 | unsigned int bytes, |
3378 | bool xmit_more) |
3379 | { |
3380 | if (xmit_more) { |
3381 | #ifdef CONFIG_BQL |
3382 | dql_queued(&dev_queue->dql, bytes); |
3383 | #endif |
3384 | return netif_tx_queue_stopped(dev_queue); |
3385 | } |
3386 | netdev_tx_sent_queue(dev_queue, bytes); |
3387 | return true; |
3388 | } |
3389 | |
3390 | /** |
3391 | * netdev_sent_queue - report the number of bytes queued to hardware |
3392 | * @dev: network device |
3393 | * @bytes: number of bytes queued to the hardware device queue |
3394 | * |
3395 | * Report the number of bytes queued for sending/completion to the network |
3396 | * device hardware queue. @bytes should be a good approximation and should |
3397 | * exactly match netdev_completed_queue() @bytes |
3398 | */ |
3399 | static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes) |
3400 | { |
3401 | netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes); |
3402 | } |
3403 | |
3404 | static inline bool __netdev_sent_queue(struct net_device *dev, |
3405 | unsigned int bytes, |
3406 | bool xmit_more) |
3407 | { |
3408 | return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes, |
3409 | xmit_more); |
3410 | } |
3411 | |
3412 | static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue, |
3413 | unsigned int pkts, unsigned int bytes) |
3414 | { |
3415 | #ifdef CONFIG_BQL |
3416 | if (unlikely(!bytes)) |
3417 | return; |
3418 | |
3419 | dql_completed(&dev_queue->dql, bytes); |
3420 | |
3421 | /* |
3422 | * Without the memory barrier there is a small possiblity that |
3423 | * netdev_tx_sent_queue will miss the update and cause the queue to |
3424 | * be stopped forever |
3425 | */ |
3426 | smp_mb(); |
3427 | |
3428 | if (unlikely(dql_avail(&dev_queue->dql) < 0)) |
3429 | return; |
3430 | |
3431 | if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state)) |
3432 | netif_schedule_queue(dev_queue); |
3433 | #endif |
3434 | } |
3435 | |
3436 | /** |
3437 | * netdev_completed_queue - report bytes and packets completed by device |
3438 | * @dev: network device |
3439 | * @pkts: actual number of packets sent over the medium |
3440 | * @bytes: actual number of bytes sent over the medium |
3441 | * |
3442 | * Report the number of bytes and packets transmitted by the network device |
3443 | * hardware queue over the physical medium, @bytes must exactly match the |
3444 | * @bytes amount passed to netdev_sent_queue() |
3445 | */ |
3446 | static inline void netdev_completed_queue(struct net_device *dev, |
3447 | unsigned int pkts, unsigned int bytes) |
3448 | { |
3449 | netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes); |
3450 | } |
3451 | |
3452 | static inline void netdev_tx_reset_queue(struct netdev_queue *q) |
3453 | { |
3454 | #ifdef CONFIG_BQL |
3455 | clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state); |
3456 | dql_reset(&q->dql); |
3457 | #endif |
3458 | } |
3459 | |
3460 | /** |
3461 | * netdev_reset_queue - reset the packets and bytes count of a network device |
3462 | * @dev_queue: network device |
3463 | * |
3464 | * Reset the bytes and packet count of a network device and clear the |
3465 | * software flow control OFF bit for this network device |
3466 | */ |
3467 | static inline void netdev_reset_queue(struct net_device *dev_queue) |
3468 | { |
3469 | netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0)); |
3470 | } |
3471 | |
3472 | /** |
3473 | * netdev_cap_txqueue - check if selected tx queue exceeds device queues |
3474 | * @dev: network device |
3475 | * @queue_index: given tx queue index |
3476 | * |
3477 | * Returns 0 if given tx queue index >= number of device tx queues, |
3478 | * otherwise returns the originally passed tx queue index. |
3479 | */ |
3480 | static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index) |
3481 | { |
3482 | if (unlikely(queue_index >= dev->real_num_tx_queues)) { |
3483 | net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n" , |
3484 | dev->name, queue_index, |
3485 | dev->real_num_tx_queues); |
3486 | return 0; |
3487 | } |
3488 | |
3489 | return queue_index; |
3490 | } |
3491 | |
3492 | /** |
3493 | * netif_running - test if up |
3494 | * @dev: network device |
3495 | * |
3496 | * Test if the device has been brought up. |
3497 | */ |
3498 | static inline bool netif_running(const struct net_device *dev) |
3499 | { |
3500 | return test_bit(__LINK_STATE_START, &dev->state); |
3501 | } |
3502 | |
3503 | /* |
3504 | * Routines to manage the subqueues on a device. We only need start, |
3505 | * stop, and a check if it's stopped. All other device management is |
3506 | * done at the overall netdevice level. |
3507 | * Also test the device if we're multiqueue. |
3508 | */ |
3509 | |
3510 | /** |
3511 | * netif_start_subqueue - allow sending packets on subqueue |
3512 | * @dev: network device |
3513 | * @queue_index: sub queue index |
3514 | * |
3515 | * Start individual transmit queue of a device with multiple transmit queues. |
3516 | */ |
3517 | static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index) |
3518 | { |
3519 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
3520 | |
3521 | netif_tx_start_queue(txq); |
3522 | } |
3523 | |
3524 | /** |
3525 | * netif_stop_subqueue - stop sending packets on subqueue |
3526 | * @dev: network device |
3527 | * @queue_index: sub queue index |
3528 | * |
3529 | * Stop individual transmit queue of a device with multiple transmit queues. |
3530 | */ |
3531 | static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index) |
3532 | { |
3533 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
3534 | netif_tx_stop_queue(txq); |
3535 | } |
3536 | |
3537 | /** |
3538 | * __netif_subqueue_stopped - test status of subqueue |
3539 | * @dev: network device |
3540 | * @queue_index: sub queue index |
3541 | * |
3542 | * Check individual transmit queue of a device with multiple transmit queues. |
3543 | */ |
3544 | static inline bool __netif_subqueue_stopped(const struct net_device *dev, |
3545 | u16 queue_index) |
3546 | { |
3547 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
3548 | |
3549 | return netif_tx_queue_stopped(txq); |
3550 | } |
3551 | |
3552 | /** |
3553 | * netif_subqueue_stopped - test status of subqueue |
3554 | * @dev: network device |
3555 | * @skb: sub queue buffer pointer |
3556 | * |
3557 | * Check individual transmit queue of a device with multiple transmit queues. |
3558 | */ |
3559 | static inline bool netif_subqueue_stopped(const struct net_device *dev, |
3560 | struct sk_buff *skb) |
3561 | { |
3562 | return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb)); |
3563 | } |
3564 | |
3565 | /** |
3566 | * netif_wake_subqueue - allow sending packets on subqueue |
3567 | * @dev: network device |
3568 | * @queue_index: sub queue index |
3569 | * |
3570 | * Resume individual transmit queue of a device with multiple transmit queues. |
3571 | */ |
3572 | static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index) |
3573 | { |
3574 | struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index); |
3575 | |
3576 | netif_tx_wake_queue(txq); |
3577 | } |
3578 | |
3579 | #ifdef CONFIG_XPS |
3580 | int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask, |
3581 | u16 index); |
3582 | int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask, |
3583 | u16 index, enum xps_map_type type); |
3584 | |
3585 | /** |
3586 | * netif_attr_test_mask - Test a CPU or Rx queue set in a mask |
3587 | * @j: CPU/Rx queue index |
3588 | * @mask: bitmask of all cpus/rx queues |
3589 | * @nr_bits: number of bits in the bitmask |
3590 | * |
3591 | * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues. |
3592 | */ |
3593 | static inline bool netif_attr_test_mask(unsigned long j, |
3594 | const unsigned long *mask, |
3595 | unsigned int nr_bits) |
3596 | { |
3597 | cpu_max_bits_warn(j, nr_bits); |
3598 | return test_bit(j, mask); |
3599 | } |
3600 | |
3601 | /** |
3602 | * netif_attr_test_online - Test for online CPU/Rx queue |
3603 | * @j: CPU/Rx queue index |
3604 | * @online_mask: bitmask for CPUs/Rx queues that are online |
3605 | * @nr_bits: number of bits in the bitmask |
3606 | * |
3607 | * Returns true if a CPU/Rx queue is online. |
3608 | */ |
3609 | static inline bool netif_attr_test_online(unsigned long j, |
3610 | const unsigned long *online_mask, |
3611 | unsigned int nr_bits) |
3612 | { |
3613 | cpu_max_bits_warn(j, nr_bits); |
3614 | |
3615 | if (online_mask) |
3616 | return test_bit(j, online_mask); |
3617 | |
3618 | return (j < nr_bits); |
3619 | } |
3620 | |
3621 | /** |
3622 | * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask |
3623 | * @n: CPU/Rx queue index |
3624 | * @srcp: the cpumask/Rx queue mask pointer |
3625 | * @nr_bits: number of bits in the bitmask |
3626 | * |
3627 | * Returns >= nr_bits if no further CPUs/Rx queues set. |
3628 | */ |
3629 | static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp, |
3630 | unsigned int nr_bits) |
3631 | { |
3632 | /* -1 is a legal arg here. */ |
3633 | if (n != -1) |
3634 | cpu_max_bits_warn(n, nr_bits); |
3635 | |
3636 | if (srcp) |
3637 | return find_next_bit(srcp, nr_bits, n + 1); |
3638 | |
3639 | return n + 1; |
3640 | } |
3641 | |
3642 | /** |
3643 | * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p |
3644 | * @n: CPU/Rx queue index |
3645 | * @src1p: the first CPUs/Rx queues mask pointer |
3646 | * @src2p: the second CPUs/Rx queues mask pointer |
3647 | * @nr_bits: number of bits in the bitmask |
3648 | * |
3649 | * Returns >= nr_bits if no further CPUs/Rx queues set in both. |
3650 | */ |
3651 | static inline int netif_attrmask_next_and(int n, const unsigned long *src1p, |
3652 | const unsigned long *src2p, |
3653 | unsigned int nr_bits) |
3654 | { |
3655 | /* -1 is a legal arg here. */ |
3656 | if (n != -1) |
3657 | cpu_max_bits_warn(n, nr_bits); |
3658 | |
3659 | if (src1p && src2p) |
3660 | return find_next_and_bit(src1p, src2p, nr_bits, n + 1); |
3661 | else if (src1p) |
3662 | return find_next_bit(src1p, nr_bits, n + 1); |
3663 | else if (src2p) |
3664 | return find_next_bit(src2p, nr_bits, n + 1); |
3665 | |
3666 | return n + 1; |
3667 | } |
3668 | #else |
3669 | static inline int netif_set_xps_queue(struct net_device *dev, |
3670 | const struct cpumask *mask, |
3671 | u16 index) |
3672 | { |
3673 | return 0; |
3674 | } |
3675 | |
3676 | static inline int __netif_set_xps_queue(struct net_device *dev, |
3677 | const unsigned long *mask, |
3678 | u16 index, enum xps_map_type type) |
3679 | { |
3680 | return 0; |
3681 | } |
3682 | #endif |
3683 | |
3684 | /** |
3685 | * netif_is_multiqueue - test if device has multiple transmit queues |
3686 | * @dev: network device |
3687 | * |
3688 | * Check if device has multiple transmit queues |
3689 | */ |
3690 | static inline bool netif_is_multiqueue(const struct net_device *dev) |
3691 | { |
3692 | return dev->num_tx_queues > 1; |
3693 | } |
3694 | |
3695 | int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq); |
3696 | |
3697 | #ifdef CONFIG_SYSFS |
3698 | int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); |
3699 | #else |
3700 | static inline int netif_set_real_num_rx_queues(struct net_device *dev, |
3701 | unsigned int rxqs) |
3702 | { |
3703 | dev->real_num_rx_queues = rxqs; |
3704 | return 0; |
3705 | } |
3706 | #endif |
3707 | int netif_set_real_num_queues(struct net_device *dev, |
3708 | unsigned int txq, unsigned int rxq); |
3709 | |
3710 | static inline struct netdev_rx_queue * |
3711 | __netif_get_rx_queue(struct net_device *dev, unsigned int rxq) |
3712 | { |
3713 | return dev->_rx + rxq; |
3714 | } |
3715 | |
3716 | #ifdef CONFIG_SYSFS |
3717 | static inline unsigned int get_netdev_rx_queue_index( |
3718 | struct netdev_rx_queue *queue) |
3719 | { |
3720 | struct net_device *dev = queue->dev; |
3721 | int index = queue - dev->_rx; |
3722 | |
3723 | BUG_ON(index >= dev->num_rx_queues); |
3724 | return index; |
3725 | } |
3726 | #endif |
3727 | |
3728 | int (void); |
3729 | |
3730 | enum skb_free_reason { |
3731 | SKB_REASON_CONSUMED, |
3732 | SKB_REASON_DROPPED, |
3733 | }; |
3734 | |
3735 | void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason); |
3736 | void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason); |
3737 | |
3738 | /* |
3739 | * It is not allowed to call kfree_skb() or consume_skb() from hardware |
3740 | * interrupt context or with hardware interrupts being disabled. |
3741 | * (in_hardirq() || irqs_disabled()) |
3742 | * |
3743 | * We provide four helpers that can be used in following contexts : |
3744 | * |
3745 | * dev_kfree_skb_irq(skb) when caller drops a packet from irq context, |
3746 | * replacing kfree_skb(skb) |
3747 | * |
3748 | * dev_consume_skb_irq(skb) when caller consumes a packet from irq context. |
3749 | * Typically used in place of consume_skb(skb) in TX completion path |
3750 | * |
3751 | * dev_kfree_skb_any(skb) when caller doesn't know its current irq context, |
3752 | * replacing kfree_skb(skb) |
3753 | * |
3754 | * dev_consume_skb_any(skb) when caller doesn't know its current irq context, |
3755 | * and consumed a packet. Used in place of consume_skb(skb) |
3756 | */ |
3757 | static inline void dev_kfree_skb_irq(struct sk_buff *skb) |
3758 | { |
3759 | __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED); |
3760 | } |
3761 | |
3762 | static inline void dev_consume_skb_irq(struct sk_buff *skb) |
3763 | { |
3764 | __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED); |
3765 | } |
3766 | |
3767 | static inline void dev_kfree_skb_any(struct sk_buff *skb) |
3768 | { |
3769 | __dev_kfree_skb_any(skb, SKB_REASON_DROPPED); |
3770 | } |
3771 | |
3772 | static inline void dev_consume_skb_any(struct sk_buff *skb) |
3773 | { |
3774 | __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED); |
3775 | } |
3776 | |
3777 | u32 bpf_prog_run_generic_xdp(struct sk_buff *skb, struct xdp_buff *xdp, |
3778 | struct bpf_prog *xdp_prog); |
3779 | void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog); |
3780 | int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb); |
3781 | int netif_rx(struct sk_buff *skb); |
3782 | int __netif_rx(struct sk_buff *skb); |
3783 | |
3784 | int netif_receive_skb(struct sk_buff *skb); |
3785 | int netif_receive_skb_core(struct sk_buff *skb); |
3786 | void netif_receive_skb_list_internal(struct list_head *head); |
3787 | void netif_receive_skb_list(struct list_head *head); |
3788 | gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb); |
3789 | void napi_gro_flush(struct napi_struct *napi, bool flush_old); |
3790 | struct sk_buff *napi_get_frags(struct napi_struct *napi); |
3791 | gro_result_t napi_gro_frags(struct napi_struct *napi); |
3792 | struct packet_offload *gro_find_receive_by_type(__be16 type); |
3793 | struct packet_offload *gro_find_complete_by_type(__be16 type); |
3794 | |
3795 | static inline void napi_free_frags(struct napi_struct *napi) |
3796 | { |
3797 | kfree_skb(napi->skb); |
3798 | napi->skb = NULL; |
3799 | } |
3800 | |
3801 | bool netdev_is_rx_handler_busy(struct net_device *dev); |
3802 | int netdev_rx_handler_register(struct net_device *dev, |
3803 | rx_handler_func_t *rx_handler, |
3804 | void *rx_handler_data); |
3805 | void netdev_rx_handler_unregister(struct net_device *dev); |
3806 | |
3807 | bool dev_valid_name(const char *name); |
3808 | static inline bool is_socket_ioctl_cmd(unsigned int cmd) |
3809 | { |
3810 | return _IOC_TYPE(cmd) == SOCK_IOC_TYPE; |
3811 | } |
3812 | int get_user_ifreq(struct ifreq *ifr, void __user **ifrdata, void __user *arg); |
3813 | int put_user_ifreq(struct ifreq *ifr, void __user *arg); |
3814 | int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, |
3815 | void __user *data, bool *need_copyout); |
3816 | int dev_ifconf(struct net *net, struct ifconf __user *ifc); |
3817 | int dev_ethtool(struct net *net, struct ifreq *ifr, void __user *userdata); |
3818 | unsigned int dev_get_flags(const struct net_device *); |
3819 | int __dev_change_flags(struct net_device *dev, unsigned int flags, |
3820 | struct netlink_ext_ack *extack); |
3821 | int dev_change_flags(struct net_device *dev, unsigned int flags, |
3822 | struct netlink_ext_ack *extack); |
3823 | void __dev_notify_flags(struct net_device *, unsigned int old_flags, |
3824 | unsigned int gchanges); |
3825 | int dev_set_alias(struct net_device *, const char *, size_t); |
3826 | int dev_get_alias(const struct net_device *, char *, size_t); |
3827 | int __dev_change_net_namespace(struct net_device *dev, struct net *net, |
3828 | const char *pat, int new_ifindex); |
3829 | static inline |
3830 | int dev_change_net_namespace(struct net_device *dev, struct net *net, |
3831 | const char *pat) |
3832 | { |
3833 | return __dev_change_net_namespace(dev, net, pat, 0); |
3834 | } |
3835 | int __dev_set_mtu(struct net_device *, int); |
3836 | int dev_set_mtu(struct net_device *, int); |
3837 | int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr, |
3838 | struct netlink_ext_ack *extack); |
3839 | int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa, |
3840 | struct netlink_ext_ack *extack); |
3841 | int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa, |
3842 | struct netlink_ext_ack *extack); |
3843 | int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name); |
3844 | int dev_get_port_parent_id(struct net_device *dev, |
3845 | struct netdev_phys_item_id *ppid, bool recurse); |
3846 | bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b); |
3847 | struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again); |
3848 | struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev, |
3849 | struct netdev_queue *txq, int *ret); |
3850 | |
3851 | int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog); |
3852 | u8 dev_xdp_prog_count(struct net_device *dev); |
3853 | u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode); |
3854 | |
3855 | int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
3856 | int dev_forward_skb(struct net_device *dev, struct sk_buff *skb); |
3857 | int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb); |
3858 | bool is_skb_forwardable(const struct net_device *dev, |
3859 | const struct sk_buff *skb); |
3860 | |
3861 | static __always_inline bool __is_skb_forwardable(const struct net_device *dev, |
3862 | const struct sk_buff *skb, |
3863 | const bool check_mtu) |
3864 | { |
3865 | const u32 vlan_hdr_len = 4; /* VLAN_HLEN */ |
3866 | unsigned int len; |
3867 | |
3868 | if (!(dev->flags & IFF_UP)) |
3869 | return false; |
3870 | |
3871 | if (!check_mtu) |
3872 | return true; |
3873 | |
3874 | len = dev->mtu + dev->hard_header_len + vlan_hdr_len; |
3875 | if (skb->len <= len) |
3876 | return true; |
3877 | |
3878 | /* if TSO is enabled, we don't care about the length as the packet |
3879 | * could be forwarded without being segmented before |
3880 | */ |
3881 | if (skb_is_gso(skb)) |
3882 | return true; |
3883 | |
3884 | return false; |
3885 | } |
3886 | |
3887 | struct net_device_core_stats __percpu *netdev_core_stats_alloc(struct net_device *dev); |
3888 | |
3889 | static inline struct net_device_core_stats __percpu *dev_core_stats(struct net_device *dev) |
3890 | { |
3891 | /* This READ_ONCE() pairs with the write in netdev_core_stats_alloc() */ |
3892 | struct net_device_core_stats __percpu *p = READ_ONCE(dev->core_stats); |
3893 | |
3894 | if (likely(p)) |
3895 | return p; |
3896 | |
3897 | return netdev_core_stats_alloc(dev); |
3898 | } |
3899 | |
3900 | #define DEV_CORE_STATS_INC(FIELD) \ |
3901 | static inline void dev_core_stats_##FIELD##_inc(struct net_device *dev) \ |
3902 | { \ |
3903 | struct net_device_core_stats __percpu *p; \ |
3904 | \ |
3905 | p = dev_core_stats(dev); \ |
3906 | if (p) \ |
3907 | this_cpu_inc(p->FIELD); \ |
3908 | } |
3909 | DEV_CORE_STATS_INC(rx_dropped) |
3910 | DEV_CORE_STATS_INC(tx_dropped) |
3911 | DEV_CORE_STATS_INC(rx_nohandler) |
3912 | DEV_CORE_STATS_INC(rx_otherhost_dropped) |
3913 | |
3914 | static __always_inline int ____dev_forward_skb(struct net_device *dev, |
3915 | struct sk_buff *skb, |
3916 | const bool check_mtu) |
3917 | { |
3918 | if (skb_orphan_frags(skb, GFP_ATOMIC) || |
3919 | unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) { |
3920 | dev_core_stats_rx_dropped_inc(dev); |
3921 | kfree_skb(skb); |
3922 | return NET_RX_DROP; |
3923 | } |
3924 | |
3925 | skb_scrub_packet(skb, !net_eq(dev_net(dev), dev_net(skb->dev))); |
3926 | skb->priority = 0; |
3927 | return 0; |
3928 | } |
3929 | |
3930 | bool dev_nit_active(struct net_device *dev); |
3931 | void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); |
3932 | |
3933 | static inline void __dev_put(struct net_device *dev) |
3934 | { |
3935 | if (dev) { |
3936 | #ifdef CONFIG_PCPU_DEV_REFCNT |
3937 | this_cpu_dec(*dev->pcpu_refcnt); |
3938 | #else |
3939 | refcount_dec(&dev->dev_refcnt); |
3940 | #endif |
3941 | } |
3942 | } |
3943 | |
3944 | static inline void __dev_hold(struct net_device *dev) |
3945 | { |
3946 | if (dev) { |
3947 | #ifdef CONFIG_PCPU_DEV_REFCNT |
3948 | this_cpu_inc(*dev->pcpu_refcnt); |
3949 | #else |
3950 | refcount_inc(&dev->dev_refcnt); |
3951 | #endif |
3952 | } |
3953 | } |
3954 | |
3955 | static inline void __netdev_tracker_alloc(struct net_device *dev, |
3956 | netdevice_tracker *tracker, |
3957 | gfp_t gfp) |
3958 | { |
3959 | #ifdef CONFIG_NET_DEV_REFCNT_TRACKER |
3960 | ref_tracker_alloc(&dev->refcnt_tracker, tracker, gfp); |
3961 | #endif |
3962 | } |
3963 | |
3964 | /* netdev_tracker_alloc() can upgrade a prior untracked reference |
3965 | * taken by dev_get_by_name()/dev_get_by_index() to a tracked one. |
3966 | */ |
3967 | static inline void netdev_tracker_alloc(struct net_device *dev, |
3968 | netdevice_tracker *tracker, gfp_t gfp) |
3969 | { |
3970 | #ifdef CONFIG_NET_DEV_REFCNT_TRACKER |
3971 | refcount_dec(&dev->refcnt_tracker.no_tracker); |
3972 | __netdev_tracker_alloc(dev, tracker, gfp); |
3973 | #endif |
3974 | } |
3975 | |
3976 | static inline void netdev_tracker_free(struct net_device *dev, |
3977 | netdevice_tracker *tracker) |
3978 | { |
3979 | #ifdef CONFIG_NET_DEV_REFCNT_TRACKER |
3980 | ref_tracker_free(&dev->refcnt_tracker, tracker); |
3981 | #endif |
3982 | } |
3983 | |
3984 | static inline void netdev_hold(struct net_device *dev, |
3985 | netdevice_tracker *tracker, gfp_t gfp) |
3986 | { |
3987 | if (dev) { |
3988 | __dev_hold(dev); |
3989 | __netdev_tracker_alloc(dev, tracker, gfp); |
3990 | } |
3991 | } |
3992 | |
3993 | static inline void netdev_put(struct net_device *dev, |
3994 | netdevice_tracker *tracker) |
3995 | { |
3996 | if (dev) { |
3997 | netdev_tracker_free(dev, tracker); |
3998 | __dev_put(dev); |
3999 | } |
4000 | } |
4001 | |
4002 | /** |
4003 | * dev_hold - get reference to device |
4004 | * @dev: network device |
4005 | * |
4006 | * Hold reference to device to keep it from being freed. |
4007 | * Try using netdev_hold() instead. |
4008 | */ |
4009 | static inline void dev_hold(struct net_device *dev) |
4010 | { |
4011 | netdev_hold(dev, NULL, GFP_ATOMIC); |
4012 | } |
4013 | |
4014 | /** |
4015 | * dev_put - release reference to device |
4016 | * @dev: network device |
4017 | * |
4018 | * Release reference to device to allow it to be freed. |
4019 | * Try using netdev_put() instead. |
4020 | */ |
4021 | static inline void dev_put(struct net_device *dev) |
4022 | { |
4023 | netdev_put(dev, NULL); |
4024 | } |
4025 | |
4026 | static inline void netdev_ref_replace(struct net_device *odev, |
4027 | struct net_device *ndev, |
4028 | netdevice_tracker *tracker, |
4029 | gfp_t gfp) |
4030 | { |
4031 | if (odev) |
4032 | netdev_tracker_free(odev, tracker); |
4033 | |
4034 | __dev_hold(ndev); |
4035 | __dev_put(odev); |
4036 | |
4037 | if (ndev) |
4038 | __netdev_tracker_alloc(ndev, tracker, gfp); |
4039 | } |
4040 | |
4041 | /* Carrier loss detection, dial on demand. The functions netif_carrier_on |
4042 | * and _off may be called from IRQ context, but it is caller |
4043 | * who is responsible for serialization of these calls. |
4044 | * |
4045 | * The name carrier is inappropriate, these functions should really be |
4046 | * called netif_lowerlayer_*() because they represent the state of any |
4047 | * kind of lower layer not just hardware media. |
4048 | */ |
4049 | void linkwatch_fire_event(struct net_device *dev); |
4050 | |
4051 | /** |
4052 | * netif_carrier_ok - test if carrier present |
4053 | * @dev: network device |
4054 | * |
4055 | * Check if carrier is present on device |
4056 | */ |
4057 | static inline bool netif_carrier_ok(const struct net_device *dev) |
4058 | { |
4059 | return !test_bit(__LINK_STATE_NOCARRIER, &dev->state); |
4060 | } |
4061 | |
4062 | unsigned long dev_trans_start(struct net_device *dev); |
4063 | |
4064 | void __netdev_watchdog_up(struct net_device *dev); |
4065 | |
4066 | void netif_carrier_on(struct net_device *dev); |
4067 | void netif_carrier_off(struct net_device *dev); |
4068 | void netif_carrier_event(struct net_device *dev); |
4069 | |
4070 | /** |
4071 | * netif_dormant_on - mark device as dormant. |
4072 | * @dev: network device |
4073 | * |
4074 | * Mark device as dormant (as per RFC2863). |
4075 | * |
4076 | * The dormant state indicates that the relevant interface is not |
4077 | * actually in a condition to pass packets (i.e., it is not 'up') but is |
4078 | * in a "pending" state, waiting for some external event. For "on- |
4079 | * demand" interfaces, this new state identifies the situation where the |
4080 | * interface is waiting for events to place it in the up state. |
4081 | */ |
4082 | static inline void netif_dormant_on(struct net_device *dev) |
4083 | { |
4084 | if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state)) |
4085 | linkwatch_fire_event(dev); |
4086 | } |
4087 | |
4088 | /** |
4089 | * netif_dormant_off - set device as not dormant. |
4090 | * @dev: network device |
4091 | * |
4092 | * Device is not in dormant state. |
4093 | */ |
4094 | static inline void netif_dormant_off(struct net_device *dev) |
4095 | { |
4096 | if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state)) |
4097 | linkwatch_fire_event(dev); |
4098 | } |
4099 | |
4100 | /** |
4101 | * netif_dormant - test if device is dormant |
4102 | * @dev: network device |
4103 | * |
4104 | * Check if device is dormant. |
4105 | */ |
4106 | static inline bool netif_dormant(const struct net_device *dev) |
4107 | { |
4108 | return test_bit(__LINK_STATE_DORMANT, &dev->state); |
4109 | } |
4110 | |
4111 | |
4112 | /** |
4113 | * netif_testing_on - mark device as under test. |
4114 | * @dev: network device |
4115 | * |
4116 | * Mark device as under test (as per RFC2863). |
4117 | * |
4118 | * The testing state indicates that some test(s) must be performed on |
4119 | * the interface. After completion, of the test, the interface state |
4120 | * will change to up, dormant, or down, as appropriate. |
4121 | */ |
4122 | static inline void netif_testing_on(struct net_device *dev) |
4123 | { |
4124 | if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state)) |
4125 | linkwatch_fire_event(dev); |
4126 | } |
4127 | |
4128 | /** |
4129 | * netif_testing_off - set device as not under test. |
4130 | * @dev: network device |
4131 | * |
4132 | * Device is not in testing state. |
4133 | */ |
4134 | static inline void netif_testing_off(struct net_device *dev) |
4135 | { |
4136 | if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state)) |
4137 | linkwatch_fire_event(dev); |
4138 | } |
4139 | |
4140 | /** |
4141 | * netif_testing - test if device is under test |
4142 | * @dev: network device |
4143 | * |
4144 | * Check if device is under test |
4145 | */ |
4146 | static inline bool netif_testing(const struct net_device *dev) |
4147 | { |
4148 | return test_bit(__LINK_STATE_TESTING, &dev->state); |
4149 | } |
4150 | |
4151 | |
4152 | /** |
4153 | * netif_oper_up - test if device is operational |
4154 | * @dev: network device |
4155 | * |
4156 | * Check if carrier is operational |
4157 | */ |
4158 | static inline bool netif_oper_up(const struct net_device *dev) |
4159 | { |
4160 | return (dev->operstate == IF_OPER_UP || |
4161 | dev->operstate == IF_OPER_UNKNOWN /* backward compat */); |
4162 | } |
4163 | |
4164 | /** |
4165 | * netif_device_present - is device available or removed |
4166 | * @dev: network device |
4167 | * |
4168 | * Check if device has not been removed from system. |
4169 | */ |
4170 | static inline bool netif_device_present(const struct net_device *dev) |
4171 | { |
4172 | return test_bit(__LINK_STATE_PRESENT, &dev->state); |
4173 | } |
4174 | |
4175 | void netif_device_detach(struct net_device *dev); |
4176 | |
4177 | void netif_device_attach(struct net_device *dev); |
4178 | |
4179 | /* |
4180 | * Network interface message level settings |
4181 | */ |
4182 | |
4183 | enum { |
4184 | NETIF_MSG_DRV_BIT, |
4185 | NETIF_MSG_PROBE_BIT, |
4186 | NETIF_MSG_LINK_BIT, |
4187 | NETIF_MSG_TIMER_BIT, |
4188 | NETIF_MSG_IFDOWN_BIT, |
4189 | NETIF_MSG_IFUP_BIT, |
4190 | NETIF_MSG_RX_ERR_BIT, |
4191 | NETIF_MSG_TX_ERR_BIT, |
4192 | NETIF_MSG_TX_QUEUED_BIT, |
4193 | NETIF_MSG_INTR_BIT, |
4194 | NETIF_MSG_TX_DONE_BIT, |
4195 | NETIF_MSG_RX_STATUS_BIT, |
4196 | NETIF_MSG_PKTDATA_BIT, |
4197 | NETIF_MSG_HW_BIT, |
4198 | NETIF_MSG_WOL_BIT, |
4199 | |
4200 | /* When you add a new bit above, update netif_msg_class_names array |
4201 | * in net/ethtool/common.c |
4202 | */ |
4203 | NETIF_MSG_CLASS_COUNT, |
4204 | }; |
4205 | /* Both ethtool_ops interface and internal driver implementation use u32 */ |
4206 | static_assert(NETIF_MSG_CLASS_COUNT <= 32); |
4207 | |
4208 | #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit)) |
4209 | #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT) |
4210 | |
4211 | #define NETIF_MSG_DRV __NETIF_MSG(DRV) |
4212 | #define NETIF_MSG_PROBE __NETIF_MSG(PROBE) |
4213 | #define NETIF_MSG_LINK __NETIF_MSG(LINK) |
4214 | #define NETIF_MSG_TIMER __NETIF_MSG(TIMER) |
4215 | #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN) |
4216 | #define NETIF_MSG_IFUP __NETIF_MSG(IFUP) |
4217 | #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR) |
4218 | #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR) |
4219 | #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED) |
4220 | #define NETIF_MSG_INTR __NETIF_MSG(INTR) |
4221 | #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE) |
4222 | #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS) |
4223 | #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA) |
4224 | #define NETIF_MSG_HW __NETIF_MSG(HW) |
4225 | #define NETIF_MSG_WOL __NETIF_MSG(WOL) |
4226 | |
4227 | #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV) |
4228 | #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE) |
4229 | #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK) |
4230 | #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER) |
4231 | #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN) |
4232 | #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP) |
4233 | #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR) |
4234 | #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR) |
4235 | #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED) |
4236 | #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR) |
4237 | #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE) |
4238 | #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS) |
4239 | #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA) |
4240 | #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW) |
4241 | #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL) |
4242 | |
4243 | static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) |
4244 | { |
4245 | /* use default */ |
4246 | if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) |
4247 | return default_msg_enable_bits; |
4248 | if (debug_value == 0) /* no output */ |
4249 | return 0; |
4250 | /* set low N bits */ |
4251 | return (1U << debug_value) - 1; |
4252 | } |
4253 | |
4254 | static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |
4255 | { |
4256 | spin_lock(&txq->_xmit_lock); |
4257 | /* Pairs with READ_ONCE() in __dev_queue_xmit() */ |
4258 | WRITE_ONCE(txq->xmit_lock_owner, cpu); |
4259 | } |
4260 | |
4261 | static inline bool __netif_tx_acquire(struct netdev_queue *txq) |
4262 | { |
4263 | __acquire(&txq->_xmit_lock); |
4264 | return true; |
4265 | } |
4266 | |
4267 | static inline void __netif_tx_release(struct netdev_queue *txq) |
4268 | { |
4269 | __release(&txq->_xmit_lock); |
4270 | } |
4271 | |
4272 | static inline void __netif_tx_lock_bh(struct netdev_queue *txq) |
4273 | { |
4274 | spin_lock_bh(&txq->_xmit_lock); |
4275 | /* Pairs with READ_ONCE() in __dev_queue_xmit() */ |
4276 | WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id()); |
4277 | } |
4278 | |
4279 | static inline bool __netif_tx_trylock(struct netdev_queue *txq) |
4280 | { |
4281 | bool ok = spin_trylock(&txq->_xmit_lock); |
4282 | |
4283 | if (likely(ok)) { |
4284 | /* Pairs with READ_ONCE() in __dev_queue_xmit() */ |
4285 | WRITE_ONCE(txq->xmit_lock_owner, smp_processor_id()); |
4286 | } |
4287 | return ok; |
4288 | } |
4289 | |
4290 | static inline void __netif_tx_unlock(struct netdev_queue *txq) |
4291 | { |
4292 | /* Pairs with READ_ONCE() in __dev_queue_xmit() */ |
4293 | WRITE_ONCE(txq->xmit_lock_owner, -1); |
4294 | spin_unlock(&txq->_xmit_lock); |
4295 | } |
4296 | |
4297 | static inline void __netif_tx_unlock_bh(struct netdev_queue *txq) |
4298 | { |
4299 | /* Pairs with READ_ONCE() in __dev_queue_xmit() */ |
4300 | WRITE_ONCE(txq->xmit_lock_owner, -1); |
4301 | spin_unlock_bh(&txq->_xmit_lock); |
4302 | } |
4303 | |
4304 | /* |
4305 | * txq->trans_start can be read locklessly from dev_watchdog() |
4306 | */ |
4307 | static inline void txq_trans_update(struct netdev_queue *txq) |
4308 | { |
4309 | if (txq->xmit_lock_owner != -1) |
4310 | WRITE_ONCE(txq->trans_start, jiffies); |
4311 | } |
4312 | |
4313 | static inline void txq_trans_cond_update(struct netdev_queue *txq) |
4314 | { |
4315 | unsigned long now = jiffies; |
4316 | |
4317 | if (READ_ONCE(txq->trans_start) != now) |
4318 | WRITE_ONCE(txq->trans_start, now); |
4319 | } |
4320 | |
4321 | /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */ |
4322 | static inline void netif_trans_update(struct net_device *dev) |
4323 | { |
4324 | struct netdev_queue *txq = netdev_get_tx_queue(dev, 0); |
4325 | |
4326 | txq_trans_cond_update(txq); |
4327 | } |
4328 | |
4329 | /** |
4330 | * netif_tx_lock - grab network device transmit lock |
4331 | * @dev: network device |
4332 | * |
4333 | * Get network device transmit lock |
4334 | */ |
4335 | void netif_tx_lock(struct net_device *dev); |
4336 | |
4337 | static inline void netif_tx_lock_bh(struct net_device *dev) |
4338 | { |
4339 | local_bh_disable(); |
4340 | netif_tx_lock(dev); |
4341 | } |
4342 | |
4343 | void netif_tx_unlock(struct net_device *dev); |
4344 | |
4345 | static inline void netif_tx_unlock_bh(struct net_device *dev) |
4346 | { |
4347 | netif_tx_unlock(dev); |
4348 | local_bh_enable(); |
4349 | } |
4350 | |
4351 | #define HARD_TX_LOCK(dev, txq, cpu) { \ |
4352 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
4353 | __netif_tx_lock(txq, cpu); \ |
4354 | } else { \ |
4355 | __netif_tx_acquire(txq); \ |
4356 | } \ |
4357 | } |
4358 | |
4359 | #define HARD_TX_TRYLOCK(dev, txq) \ |
4360 | (((dev->features & NETIF_F_LLTX) == 0) ? \ |
4361 | __netif_tx_trylock(txq) : \ |
4362 | __netif_tx_acquire(txq)) |
4363 | |
4364 | #define HARD_TX_UNLOCK(dev, txq) { \ |
4365 | if ((dev->features & NETIF_F_LLTX) == 0) { \ |
4366 | __netif_tx_unlock(txq); \ |
4367 | } else { \ |
4368 | __netif_tx_release(txq); \ |
4369 | } \ |
4370 | } |
4371 | |
4372 | static inline void netif_tx_disable(struct net_device *dev) |
4373 | { |
4374 | unsigned int i; |
4375 | int cpu; |
4376 | |
4377 | local_bh_disable(); |
4378 | cpu = smp_processor_id(); |
4379 | spin_lock(&dev->tx_global_lock); |
4380 | for (i = 0; i < dev->num_tx_queues; i++) { |
4381 | struct netdev_queue *txq = netdev_get_tx_queue(dev, i); |
4382 | |
4383 | __netif_tx_lock(txq, cpu); |
4384 | netif_tx_stop_queue(txq); |
4385 | __netif_tx_unlock(txq); |
4386 | } |
4387 | spin_unlock(&dev->tx_global_lock); |
4388 | local_bh_enable(); |
4389 | } |
4390 | |
4391 | static inline void netif_addr_lock(struct net_device *dev) |
4392 | { |
4393 | unsigned char nest_level = 0; |
4394 | |
4395 | #ifdef CONFIG_LOCKDEP |
4396 | nest_level = dev->nested_level; |
4397 | #endif |
4398 | spin_lock_nested(&dev->addr_list_lock, nest_level); |
4399 | } |
4400 | |
4401 | static inline void netif_addr_lock_bh(struct net_device *dev) |
4402 | { |
4403 | unsigned char nest_level = 0; |
4404 | |
4405 | #ifdef CONFIG_LOCKDEP |
4406 | nest_level = dev->nested_level; |
4407 | #endif |
4408 | local_bh_disable(); |
4409 | spin_lock_nested(&dev->addr_list_lock, nest_level); |
4410 | } |
4411 | |
4412 | static inline void netif_addr_unlock(struct net_device *dev) |
4413 | { |
4414 | spin_unlock(&dev->addr_list_lock); |
4415 | } |
4416 | |
4417 | static inline void netif_addr_unlock_bh(struct net_device *dev) |
4418 | { |
4419 | spin_unlock_bh(&dev->addr_list_lock); |
4420 | } |
4421 | |
4422 | /* |
4423 | * dev_addrs walker. Should be used only for read access. Call with |
4424 | * rcu_read_lock held. |
4425 | */ |
4426 | #define for_each_dev_addr(dev, ha) \ |
4427 | list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list) |
4428 | |
4429 | /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |
4430 | |
4431 | void ether_setup(struct net_device *dev); |
4432 | |
4433 | /* Support for loadable net-drivers */ |
4434 | struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, |
4435 | unsigned char name_assign_type, |
4436 | void (*setup)(struct net_device *), |
4437 | unsigned int txqs, unsigned int rxqs); |
4438 | #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \ |
4439 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1) |
4440 | |
4441 | #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \ |
4442 | alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \ |
4443 | count) |
4444 | |
4445 | int register_netdev(struct net_device *dev); |
4446 | void unregister_netdev(struct net_device *dev); |
4447 | |
4448 | int devm_register_netdev(struct device *dev, struct net_device *ndev); |
4449 | |
4450 | /* General hardware address lists handling functions */ |
4451 | int __hw_addr_sync(struct netdev_hw_addr_list *to_list, |
4452 | struct netdev_hw_addr_list *from_list, int addr_len); |
4453 | void __hw_addr_unsync(struct netdev_hw_addr_list *to_list, |
4454 | struct netdev_hw_addr_list *from_list, int addr_len); |
4455 | int __hw_addr_sync_dev(struct netdev_hw_addr_list *list, |
4456 | struct net_device *dev, |
4457 | int (*sync)(struct net_device *, const unsigned char *), |
4458 | int (*unsync)(struct net_device *, |
4459 | const unsigned char *)); |
4460 | int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list, |
4461 | struct net_device *dev, |
4462 | int (*sync)(struct net_device *, |
4463 | const unsigned char *, int), |
4464 | int (*unsync)(struct net_device *, |
4465 | const unsigned char *, int)); |
4466 | void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list, |
4467 | struct net_device *dev, |
4468 | int (*unsync)(struct net_device *, |
4469 | const unsigned char *, int)); |
4470 | void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list, |
4471 | struct net_device *dev, |
4472 | int (*unsync)(struct net_device *, |
4473 | const unsigned char *)); |
4474 | void __hw_addr_init(struct netdev_hw_addr_list *list); |
4475 | |
4476 | /* Functions used for device addresses handling */ |
4477 | void dev_addr_mod(struct net_device *dev, unsigned int offset, |
4478 | const void *addr, size_t len); |
4479 | |
4480 | static inline void |
4481 | __dev_addr_set(struct net_device *dev, const void *addr, size_t len) |
4482 | { |
4483 | dev_addr_mod(dev, 0, addr, len); |
4484 | } |
4485 | |
4486 | static inline void dev_addr_set(struct net_device *dev, const u8 *addr) |
4487 | { |
4488 | __dev_addr_set(dev, addr, dev->addr_len); |
4489 | } |
4490 | |
4491 | int dev_addr_add(struct net_device *dev, const unsigned char *addr, |
4492 | unsigned char addr_type); |
4493 | int dev_addr_del(struct net_device *dev, const unsigned char *addr, |
4494 | unsigned char addr_type); |
4495 | |
4496 | /* Functions used for unicast addresses handling */ |
4497 | int dev_uc_add(struct net_device *dev, const unsigned char *addr); |
4498 | int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr); |
4499 | int dev_uc_del(struct net_device *dev, const unsigned char *addr); |
4500 | int dev_uc_sync(struct net_device *to, struct net_device *from); |
4501 | int dev_uc_sync_multiple(struct net_device *to, struct net_device *from); |
4502 | void dev_uc_unsync(struct net_device *to, struct net_device *from); |
4503 | void dev_uc_flush(struct net_device *dev); |
4504 | void dev_uc_init(struct net_device *dev); |
4505 | |
4506 | /** |
4507 | * __dev_uc_sync - Synchonize device's unicast list |
4508 | * @dev: device to sync |
4509 | * @sync: function to call if address should be added |
4510 | * @unsync: function to call if address should be removed |
4511 | * |
4512 | * Add newly added addresses to the interface, and release |
4513 | * addresses that have been deleted. |
4514 | */ |
4515 | static inline int __dev_uc_sync(struct net_device *dev, |
4516 | int (*sync)(struct net_device *, |
4517 | const unsigned char *), |
4518 | int (*unsync)(struct net_device *, |
4519 | const unsigned char *)) |
4520 | { |
4521 | return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync); |
4522 | } |
4523 | |
4524 | /** |
4525 | * __dev_uc_unsync - Remove synchronized addresses from device |
4526 | * @dev: device to sync |
4527 | * @unsync: function to call if address should be removed |
4528 | * |
4529 | * Remove all addresses that were added to the device by dev_uc_sync(). |
4530 | */ |
4531 | static inline void __dev_uc_unsync(struct net_device *dev, |
4532 | int (*unsync)(struct net_device *, |
4533 | const unsigned char *)) |
4534 | { |
4535 | __hw_addr_unsync_dev(&dev->uc, dev, unsync); |
4536 | } |
4537 | |
4538 | /* Functions used for multicast addresses handling */ |
4539 | int dev_mc_add(struct net_device *dev, const unsigned char *addr); |
4540 | int dev_mc_add_global(struct net_device *dev, const unsigned char *addr); |
4541 | int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr); |
4542 | int dev_mc_del(struct net_device *dev, const unsigned char *addr); |
4543 | int dev_mc_del_global(struct net_device *dev, const unsigned char *addr); |
4544 | int dev_mc_sync(struct net_device *to, struct net_device *from); |
4545 | int dev_mc_sync_multiple(struct net_device *to, struct net_device *from); |
4546 | void dev_mc_unsync(struct net_device *to, struct net_device *from); |
4547 | void dev_mc_flush(struct net_device *dev); |
4548 | void dev_mc_init(struct net_device *dev); |
4549 | |
4550 | /** |
4551 | * __dev_mc_sync - Synchonize device's multicast list |
4552 | * @dev: device to sync |
4553 | * @sync: function to call if address should be added |
4554 | * @unsync: function to call if address should be removed |
4555 | * |
4556 | * Add newly added addresses to the interface, and release |
4557 | * addresses that have been deleted. |
4558 | */ |
4559 | static inline int __dev_mc_sync(struct net_device *dev, |
4560 | int (*sync)(struct net_device *, |
4561 | const unsigned char *), |
4562 | int (*unsync)(struct net_device *, |
4563 | const unsigned char *)) |
4564 | { |
4565 | return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync); |
4566 | } |
4567 | |
4568 | /** |
4569 | * __dev_mc_unsync - Remove synchronized addresses from device |
4570 | * @dev: device to sync |
4571 | * @unsync: function to call if address should be removed |
4572 | * |
4573 | * Remove all addresses that were added to the device by dev_mc_sync(). |
4574 | */ |
4575 | static inline void __dev_mc_unsync(struct net_device *dev, |
4576 | int (*unsync)(struct net_device *, |
4577 | const unsigned char *)) |
4578 | { |
4579 | __hw_addr_unsync_dev(&dev->mc, dev, unsync); |
4580 | } |
4581 | |
4582 | /* Functions used for secondary unicast and multicast support */ |
4583 | void dev_set_rx_mode(struct net_device *dev); |
4584 | int dev_set_promiscuity(struct net_device *dev, int inc); |
4585 | int dev_set_allmulti(struct net_device *dev, int inc); |
4586 | void netdev_state_change(struct net_device *dev); |
4587 | void __netdev_notify_peers(struct net_device *dev); |
4588 | void netdev_notify_peers(struct net_device *dev); |
4589 | void netdev_features_change(struct net_device *dev); |
4590 | /* Load a device via the kmod */ |
4591 | void dev_load(struct net *net, const char *name); |
4592 | struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev, |
4593 | struct rtnl_link_stats64 *storage); |
4594 | void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64, |
4595 | const struct net_device_stats *netdev_stats); |
4596 | void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s, |
4597 | const struct pcpu_sw_netstats __percpu *netstats); |
4598 | void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s); |
4599 | |
4600 | extern int netdev_max_backlog; |
4601 | extern int dev_rx_weight; |
4602 | extern int dev_tx_weight; |
4603 | extern int gro_normal_batch; |
4604 | |
4605 | enum { |
4606 | NESTED_SYNC_IMM_BIT, |
4607 | NESTED_SYNC_TODO_BIT, |
4608 | }; |
4609 | |
4610 | #define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit)) |
4611 | #define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT) |
4612 | |
4613 | #define NESTED_SYNC_IMM __NESTED_SYNC(IMM) |
4614 | #define NESTED_SYNC_TODO __NESTED_SYNC(TODO) |
4615 | |
4616 | struct netdev_nested_priv { |
4617 | unsigned char flags; |
4618 | void *data; |
4619 | }; |
4620 | |
4621 | bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev); |
4622 | struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev, |
4623 | struct list_head **iter); |
4624 | |
4625 | /* iterate through upper list, must be called under RCU read lock */ |
4626 | #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \ |
4627 | for (iter = &(dev)->adj_list.upper, \ |
4628 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \ |
4629 | updev; \ |
4630 | updev = netdev_upper_get_next_dev_rcu(dev, &(iter))) |
4631 | |
4632 | int netdev_walk_all_upper_dev_rcu(struct net_device *dev, |
4633 | int (*fn)(struct net_device *upper_dev, |
4634 | struct netdev_nested_priv *priv), |
4635 | struct netdev_nested_priv *priv); |
4636 | |
4637 | bool netdev_has_upper_dev_all_rcu(struct net_device *dev, |
4638 | struct net_device *upper_dev); |
4639 | |
4640 | bool netdev_has_any_upper_dev(struct net_device *dev); |
4641 | |
4642 | void *netdev_lower_get_next_private(struct net_device *dev, |
4643 | struct list_head **iter); |
4644 | void *netdev_lower_get_next_private_rcu(struct net_device *dev, |
4645 | struct list_head **iter); |
4646 | |
4647 | #define netdev_for_each_lower_private(dev, priv, iter) \ |
4648 | for (iter = (dev)->adj_list.lower.next, \ |
4649 | priv = netdev_lower_get_next_private(dev, &(iter)); \ |
4650 | priv; \ |
4651 | priv = netdev_lower_get_next_private(dev, &(iter))) |
4652 | |
4653 | #define netdev_for_each_lower_private_rcu(dev, priv, iter) \ |
4654 | for (iter = &(dev)->adj_list.lower, \ |
4655 | priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \ |
4656 | priv; \ |
4657 | priv = netdev_lower_get_next_private_rcu(dev, &(iter))) |
4658 | |
4659 | void *netdev_lower_get_next(struct net_device *dev, |
4660 | struct list_head **iter); |
4661 | |
4662 | #define netdev_for_each_lower_dev(dev, ldev, iter) \ |
4663 | for (iter = (dev)->adj_list.lower.next, \ |
4664 | ldev = netdev_lower_get_next(dev, &(iter)); \ |
4665 | ldev; \ |
4666 | ldev = netdev_lower_get_next(dev, &(iter))) |
4667 | |
4668 | struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev, |
4669 | struct list_head **iter); |
4670 | int netdev_walk_all_lower_dev(struct net_device *dev, |
4671 | int (*fn)(struct net_device *lower_dev, |
4672 | struct netdev_nested_priv *priv), |
4673 | struct netdev_nested_priv *priv); |
4674 | int netdev_walk_all_lower_dev_rcu(struct net_device *dev, |
4675 | int (*fn)(struct net_device *lower_dev, |
4676 | struct netdev_nested_priv *priv), |
4677 | struct netdev_nested_priv *priv); |
4678 | |
4679 | void *netdev_adjacent_get_private(struct list_head *adj_list); |
4680 | void *netdev_lower_get_first_private_rcu(struct net_device *dev); |
4681 | struct net_device *netdev_master_upper_dev_get(struct net_device *dev); |
4682 | struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev); |
4683 | int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev, |
4684 | struct netlink_ext_ack *extack); |
4685 | int netdev_master_upper_dev_link(struct net_device *dev, |
4686 | struct net_device *upper_dev, |
4687 | void *upper_priv, void *upper_info, |
4688 | struct netlink_ext_ack *extack); |
4689 | void netdev_upper_dev_unlink(struct net_device *dev, |
4690 | struct net_device *upper_dev); |
4691 | int netdev_adjacent_change_prepare(struct net_device *old_dev, |
4692 | struct net_device *new_dev, |
4693 | struct net_device *dev, |
4694 | struct netlink_ext_ack *extack); |
4695 | void netdev_adjacent_change_commit(struct net_device *old_dev, |
4696 | struct net_device *new_dev, |
4697 | struct net_device *dev); |
4698 | void netdev_adjacent_change_abort(struct net_device *old_dev, |
4699 | struct net_device *new_dev, |
4700 | struct ne |
---|