Line data Source code
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 :
32 : #include <linux/percpu.h>
33 : #include <linux/rculist.h>
34 : #include <linux/workqueue.h>
35 : #include <linux/dynamic_queue_limits.h>
36 :
37 : #include <net/net_namespace.h>
38 : #ifdef CONFIG_DCB
39 : #include <net/dcbnl.h>
40 : #endif
41 : #include <net/netprio_cgroup.h>
42 : #include <net/xdp.h>
43 :
44 : #include <linux/netdev_features.h>
45 : #include <linux/neighbour.h>
46 : #include <uapi/linux/netdevice.h>
47 : #include <uapi/linux/if_bonding.h>
48 : #include <uapi/linux/pkt_cls.h>
49 : #include <linux/hashtable.h>
50 :
51 : struct netpoll_info;
52 : struct device;
53 : struct ethtool_ops;
54 : struct phy_device;
55 : struct dsa_port;
56 : struct ip_tunnel_parm;
57 : struct macsec_context;
58 : struct macsec_ops;
59 :
60 : struct sfp_bus;
61 : /* 802.11 specific */
62 : struct wireless_dev;
63 : /* 802.15.4 specific */
64 : struct wpan_dev;
65 : struct mpls_dev;
66 : /* UDP Tunnel offloads */
67 : struct udp_tunnel_info;
68 : struct udp_tunnel_nic_info;
69 : struct udp_tunnel_nic;
70 : struct bpf_prog;
71 : struct xdp_buff;
72 :
73 : void synchronize_net(void);
74 : void netdev_set_default_ethtool_ops(struct net_device *dev,
75 : const struct ethtool_ops *ops);
76 :
77 : /* Backlog congestion levels */
78 : #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
79 : #define NET_RX_DROP 1 /* packet dropped */
80 :
81 : #define MAX_NEST_DEV 8
82 :
83 : /*
84 : * Transmit return codes: transmit return codes originate from three different
85 : * namespaces:
86 : *
87 : * - qdisc return codes
88 : * - driver transmit return codes
89 : * - errno values
90 : *
91 : * Drivers are allowed to return any one of those in their hard_start_xmit()
92 : * function. Real network devices commonly used with qdiscs should only return
93 : * the driver transmit return codes though - when qdiscs are used, the actual
94 : * transmission happens asynchronously, so the value is not propagated to
95 : * higher layers. Virtual network devices transmit synchronously; in this case
96 : * the driver transmit return codes are consumed by dev_queue_xmit(), and all
97 : * others are propagated to higher layers.
98 : */
99 :
100 : /* qdisc ->enqueue() return codes. */
101 : #define NET_XMIT_SUCCESS 0x00
102 : #define NET_XMIT_DROP 0x01 /* skb dropped */
103 : #define NET_XMIT_CN 0x02 /* congestion notification */
104 : #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
105 :
106 : /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
107 : * indicates that the device will soon be dropping packets, or already drops
108 : * some packets of the same priority; prompting us to send less aggressively. */
109 : #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
110 : #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
111 :
112 : /* Driver transmit return codes */
113 : #define NETDEV_TX_MASK 0xf0
114 :
115 : enum netdev_tx {
116 : __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
117 : NETDEV_TX_OK = 0x00, /* driver took care of packet */
118 : NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
119 : };
120 : typedef enum netdev_tx netdev_tx_t;
121 :
122 : /*
123 : * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
124 : * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
125 : */
126 896 : static inline bool dev_xmit_complete(int rc)
127 : {
128 : /*
129 : * Positive cases with an skb consumed by a driver:
130 : * - successful transmission (rc == NETDEV_TX_OK)
131 : * - error while transmitting (rc < 0)
132 : * - error while queueing to a different device (rc & NET_XMIT_MASK)
133 : */
134 896 : if (likely(rc < NET_XMIT_MASK))
135 448 : return true;
136 :
137 : return false;
138 : }
139 :
140 : /*
141 : * Compute the worst-case header length according to the protocols
142 : * used.
143 : */
144 :
145 : #if defined(CONFIG_HYPERV_NET)
146 : # define LL_MAX_HEADER 128
147 : #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
148 : # if defined(CONFIG_MAC80211_MESH)
149 : # define LL_MAX_HEADER 128
150 : # else
151 : # define LL_MAX_HEADER 96
152 : # endif
153 : #else
154 : # define LL_MAX_HEADER 32
155 : #endif
156 :
157 : #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
158 : !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
159 : #define MAX_HEADER LL_MAX_HEADER
160 : #else
161 : #define MAX_HEADER (LL_MAX_HEADER + 48)
162 : #endif
163 :
164 : /*
165 : * Old network device statistics. Fields are native words
166 : * (unsigned long) so they can be read and written atomically.
167 : */
168 :
169 : struct net_device_stats {
170 : unsigned long rx_packets;
171 : unsigned long tx_packets;
172 : unsigned long rx_bytes;
173 : unsigned long tx_bytes;
174 : unsigned long rx_errors;
175 : unsigned long tx_errors;
176 : unsigned long rx_dropped;
177 : unsigned long tx_dropped;
178 : unsigned long multicast;
179 : unsigned long collisions;
180 : unsigned long rx_length_errors;
181 : unsigned long rx_over_errors;
182 : unsigned long rx_crc_errors;
183 : unsigned long rx_frame_errors;
184 : unsigned long rx_fifo_errors;
185 : unsigned long rx_missed_errors;
186 : unsigned long tx_aborted_errors;
187 : unsigned long tx_carrier_errors;
188 : unsigned long tx_fifo_errors;
189 : unsigned long tx_heartbeat_errors;
190 : unsigned long tx_window_errors;
191 : unsigned long rx_compressed;
192 : unsigned long tx_compressed;
193 : };
194 :
195 :
196 : #include <linux/cache.h>
197 : #include <linux/skbuff.h>
198 :
199 : #ifdef CONFIG_RPS
200 : #include <linux/static_key.h>
201 : extern struct static_key_false rps_needed;
202 : extern struct static_key_false rfs_needed;
203 : #endif
204 :
205 : struct neighbour;
206 : struct neigh_parms;
207 : struct sk_buff;
208 :
209 : struct netdev_hw_addr {
210 : struct list_head list;
211 : unsigned char addr[MAX_ADDR_LEN];
212 : unsigned char type;
213 : #define NETDEV_HW_ADDR_T_LAN 1
214 : #define NETDEV_HW_ADDR_T_SAN 2
215 : #define NETDEV_HW_ADDR_T_UNICAST 3
216 : #define NETDEV_HW_ADDR_T_MULTICAST 4
217 : bool global_use;
218 : int sync_cnt;
219 : int refcount;
220 : int synced;
221 : struct rcu_head rcu_head;
222 : };
223 :
224 : struct netdev_hw_addr_list {
225 : struct list_head list;
226 : int count;
227 : };
228 :
229 : #define netdev_hw_addr_list_count(l) ((l)->count)
230 : #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
231 : #define netdev_hw_addr_list_for_each(ha, l) \
232 : list_for_each_entry(ha, &(l)->list, list)
233 :
234 : #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
235 : #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
236 : #define netdev_for_each_uc_addr(ha, dev) \
237 : netdev_hw_addr_list_for_each(ha, &(dev)->uc)
238 :
239 : #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
240 : #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
241 : #define netdev_for_each_mc_addr(ha, dev) \
242 : netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 :
244 : struct hh_cache {
245 : unsigned int hh_len;
246 : seqlock_t hh_lock;
247 :
248 : /* cached hardware header; allow for machine alignment needs. */
249 : #define HH_DATA_MOD 16
250 : #define HH_DATA_OFF(__len) \
251 : (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
252 : #define HH_DATA_ALIGN(__len) \
253 : (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
254 : unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
255 : };
256 :
257 : /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
258 : * Alternative is:
259 : * dev->hard_header_len ? (dev->hard_header_len +
260 : * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
261 : *
262 : * We could use other alignment values, but we must maintain the
263 : * relationship HH alignment <= LL alignment.
264 : */
265 : #define LL_RESERVED_SPACE(dev) \
266 : ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
267 : #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
268 : ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
269 :
270 : struct header_ops {
271 : int (*create) (struct sk_buff *skb, struct net_device *dev,
272 : unsigned short type, const void *daddr,
273 : const void *saddr, unsigned int len);
274 : int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
275 : int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
276 : void (*cache_update)(struct hh_cache *hh,
277 : const struct net_device *dev,
278 : const unsigned char *haddr);
279 : bool (*validate)(const char *ll_header, unsigned int len);
280 : __be16 (*parse_protocol)(const struct sk_buff *skb);
281 : };
282 :
283 : /* These flag bits are private to the generic network queueing
284 : * layer; they may not be explicitly referenced by any other
285 : * code.
286 : */
287 :
288 : enum netdev_state_t {
289 : __LINK_STATE_START,
290 : __LINK_STATE_PRESENT,
291 : __LINK_STATE_NOCARRIER,
292 : __LINK_STATE_LINKWATCH_PENDING,
293 : __LINK_STATE_DORMANT,
294 : __LINK_STATE_TESTING,
295 : };
296 :
297 :
298 : /*
299 : * This structure holds boot-time configured netdevice settings. They
300 : * are then used in the device probing.
301 : */
302 : struct netdev_boot_setup {
303 : char name[IFNAMSIZ];
304 : struct ifmap map;
305 : };
306 : #define NETDEV_BOOT_SETUP_MAX 8
307 :
308 : int __init netdev_boot_setup(char *str);
309 :
310 : struct gro_list {
311 : struct list_head list;
312 : int count;
313 : };
314 :
315 : /*
316 : * size of gro hash buckets, must less than bit number of
317 : * napi_struct::gro_bitmask
318 : */
319 : #define GRO_HASH_BUCKETS 8
320 :
321 : /*
322 : * Structure for NAPI scheduling similar to tasklet but with weighting
323 : */
324 : struct napi_struct {
325 : /* The poll_list must only be managed by the entity which
326 : * changes the state of the NAPI_STATE_SCHED bit. This means
327 : * whoever atomically sets that bit can add this napi_struct
328 : * to the per-CPU poll_list, and whoever clears that bit
329 : * can remove from the list right before clearing the bit.
330 : */
331 : struct list_head poll_list;
332 :
333 : unsigned long state;
334 : int weight;
335 : int defer_hard_irqs_count;
336 : unsigned long gro_bitmask;
337 : int (*poll)(struct napi_struct *, int);
338 : #ifdef CONFIG_NETPOLL
339 : int poll_owner;
340 : #endif
341 : struct net_device *dev;
342 : struct gro_list gro_hash[GRO_HASH_BUCKETS];
343 : struct sk_buff *skb;
344 : struct list_head rx_list; /* Pending GRO_NORMAL skbs */
345 : int rx_count; /* length of rx_list */
346 : struct hrtimer timer;
347 : struct list_head dev_list;
348 : struct hlist_node napi_hash_node;
349 : unsigned int napi_id;
350 : struct task_struct *thread;
351 : };
352 :
353 : enum {
354 : NAPI_STATE_SCHED, /* Poll is scheduled */
355 : NAPI_STATE_MISSED, /* reschedule a napi */
356 : NAPI_STATE_DISABLE, /* Disable pending */
357 : NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
358 : NAPI_STATE_LISTED, /* NAPI added to system lists */
359 : NAPI_STATE_NO_BUSY_POLL, /* Do not add in napi_hash, no busy polling */
360 : NAPI_STATE_IN_BUSY_POLL, /* sk_busy_loop() owns this NAPI */
361 : NAPI_STATE_PREFER_BUSY_POLL, /* prefer busy-polling over softirq processing*/
362 : NAPI_STATE_THREADED, /* The poll is performed inside its own thread*/
363 : };
364 :
365 : enum {
366 : NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
367 : NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
368 : NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
369 : NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
370 : NAPIF_STATE_LISTED = BIT(NAPI_STATE_LISTED),
371 : NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
372 : NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
373 : NAPIF_STATE_PREFER_BUSY_POLL = BIT(NAPI_STATE_PREFER_BUSY_POLL),
374 : NAPIF_STATE_THREADED = BIT(NAPI_STATE_THREADED),
375 : };
376 :
377 : enum gro_result {
378 : GRO_MERGED,
379 : GRO_MERGED_FREE,
380 : GRO_HELD,
381 : GRO_NORMAL,
382 : GRO_CONSUMED,
383 : };
384 : typedef enum gro_result gro_result_t;
385 :
386 : /*
387 : * enum rx_handler_result - Possible return values for rx_handlers.
388 : * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
389 : * further.
390 : * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
391 : * case skb->dev was changed by rx_handler.
392 : * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
393 : * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
394 : *
395 : * rx_handlers are functions called from inside __netif_receive_skb(), to do
396 : * special processing of the skb, prior to delivery to protocol handlers.
397 : *
398 : * Currently, a net_device can only have a single rx_handler registered. Trying
399 : * to register a second rx_handler will return -EBUSY.
400 : *
401 : * To register a rx_handler on a net_device, use netdev_rx_handler_register().
402 : * To unregister a rx_handler on a net_device, use
403 : * netdev_rx_handler_unregister().
404 : *
405 : * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
406 : * do with the skb.
407 : *
408 : * If the rx_handler consumed the skb in some way, it should return
409 : * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
410 : * the skb to be delivered in some other way.
411 : *
412 : * If the rx_handler changed skb->dev, to divert the skb to another
413 : * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
414 : * new device will be called if it exists.
415 : *
416 : * If the rx_handler decides the skb should be ignored, it should return
417 : * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
418 : * are registered on exact device (ptype->dev == skb->dev).
419 : *
420 : * If the rx_handler didn't change skb->dev, but wants the skb to be normally
421 : * delivered, it should return RX_HANDLER_PASS.
422 : *
423 : * A device without a registered rx_handler will behave as if rx_handler
424 : * returned RX_HANDLER_PASS.
425 : */
426 :
427 : enum rx_handler_result {
428 : RX_HANDLER_CONSUMED,
429 : RX_HANDLER_ANOTHER,
430 : RX_HANDLER_EXACT,
431 : RX_HANDLER_PASS,
432 : };
433 : typedef enum rx_handler_result rx_handler_result_t;
434 : typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
435 :
436 : void __napi_schedule(struct napi_struct *n);
437 : void __napi_schedule_irqoff(struct napi_struct *n);
438 :
439 0 : static inline bool napi_disable_pending(struct napi_struct *n)
440 : {
441 0 : return test_bit(NAPI_STATE_DISABLE, &n->state);
442 : }
443 :
444 0 : static inline bool napi_prefer_busy_poll(struct napi_struct *n)
445 : {
446 0 : return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state);
447 : }
448 :
449 : bool napi_schedule_prep(struct napi_struct *n);
450 :
451 : /**
452 : * napi_schedule - schedule NAPI poll
453 : * @n: NAPI context
454 : *
455 : * Schedule NAPI poll routine to be called if it is not already
456 : * running.
457 : */
458 0 : static inline void napi_schedule(struct napi_struct *n)
459 : {
460 0 : if (napi_schedule_prep(n))
461 0 : __napi_schedule(n);
462 0 : }
463 :
464 : /**
465 : * napi_schedule_irqoff - schedule NAPI poll
466 : * @n: NAPI context
467 : *
468 : * Variant of napi_schedule(), assuming hard irqs are masked.
469 : */
470 : static inline void napi_schedule_irqoff(struct napi_struct *n)
471 : {
472 : if (napi_schedule_prep(n))
473 : __napi_schedule_irqoff(n);
474 : }
475 :
476 : /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
477 : static inline bool napi_reschedule(struct napi_struct *napi)
478 : {
479 : if (napi_schedule_prep(napi)) {
480 : __napi_schedule(napi);
481 : return true;
482 : }
483 : return false;
484 : }
485 :
486 : bool napi_complete_done(struct napi_struct *n, int work_done);
487 : /**
488 : * napi_complete - NAPI processing complete
489 : * @n: NAPI context
490 : *
491 : * Mark NAPI processing as complete.
492 : * Consider using napi_complete_done() instead.
493 : * Return false if device should avoid rearming interrupts.
494 : */
495 0 : static inline bool napi_complete(struct napi_struct *n)
496 : {
497 0 : return napi_complete_done(n, 0);
498 : }
499 :
500 : int dev_set_threaded(struct net_device *dev, bool threaded);
501 :
502 : /**
503 : * napi_disable - prevent NAPI from scheduling
504 : * @n: NAPI context
505 : *
506 : * Stop NAPI from being scheduled on this context.
507 : * Waits till any outstanding processing completes.
508 : */
509 : void napi_disable(struct napi_struct *n);
510 :
511 : void napi_enable(struct napi_struct *n);
512 :
513 : /**
514 : * napi_synchronize - wait until NAPI is not running
515 : * @n: NAPI context
516 : *
517 : * Wait until NAPI is done being scheduled on this context.
518 : * Waits till any outstanding processing completes but
519 : * does not disable future activations.
520 : */
521 : static inline void napi_synchronize(const struct napi_struct *n)
522 : {
523 : if (IS_ENABLED(CONFIG_SMP))
524 : while (test_bit(NAPI_STATE_SCHED, &n->state))
525 : msleep(1);
526 : else
527 : barrier();
528 : }
529 :
530 : /**
531 : * napi_if_scheduled_mark_missed - if napi is running, set the
532 : * NAPIF_STATE_MISSED
533 : * @n: NAPI context
534 : *
535 : * If napi is running, set the NAPIF_STATE_MISSED, and return true if
536 : * NAPI is scheduled.
537 : **/
538 : static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
539 : {
540 : unsigned long val, new;
541 :
542 : do {
543 : val = READ_ONCE(n->state);
544 : if (val & NAPIF_STATE_DISABLE)
545 : return true;
546 :
547 : if (!(val & NAPIF_STATE_SCHED))
548 : return false;
549 :
550 : new = val | NAPIF_STATE_MISSED;
551 : } while (cmpxchg(&n->state, val, new) != val);
552 :
553 : return true;
554 : }
555 :
556 : enum netdev_queue_state_t {
557 : __QUEUE_STATE_DRV_XOFF,
558 : __QUEUE_STATE_STACK_XOFF,
559 : __QUEUE_STATE_FROZEN,
560 : };
561 :
562 : #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
563 : #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
564 : #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
565 :
566 : #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
567 : #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
568 : QUEUE_STATE_FROZEN)
569 : #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
570 : QUEUE_STATE_FROZEN)
571 :
572 : /*
573 : * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
574 : * netif_tx_* functions below are used to manipulate this flag. The
575 : * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
576 : * queue independently. The netif_xmit_*stopped functions below are called
577 : * to check if the queue has been stopped by the driver or stack (either
578 : * of the XOFF bits are set in the state). Drivers should not need to call
579 : * netif_xmit*stopped functions, they should only be using netif_tx_*.
580 : */
581 :
582 : struct netdev_queue {
583 : /*
584 : * read-mostly part
585 : */
586 : struct net_device *dev;
587 : struct Qdisc __rcu *qdisc;
588 : struct Qdisc *qdisc_sleeping;
589 : #ifdef CONFIG_SYSFS
590 : struct kobject kobj;
591 : #endif
592 : #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
593 : int numa_node;
594 : #endif
595 : unsigned long tx_maxrate;
596 : /*
597 : * Number of TX timeouts for this queue
598 : * (/sys/class/net/DEV/Q/trans_timeout)
599 : */
600 : unsigned long trans_timeout;
601 :
602 : /* Subordinate device that the queue has been assigned to */
603 : struct net_device *sb_dev;
604 : #ifdef CONFIG_XDP_SOCKETS
605 : struct xsk_buff_pool *pool;
606 : #endif
607 : /*
608 : * write-mostly part
609 : */
610 : spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
611 : int xmit_lock_owner;
612 : /*
613 : * Time (in jiffies) of last Tx
614 : */
615 : unsigned long trans_start;
616 :
617 : unsigned long state;
618 :
619 : #ifdef CONFIG_BQL
620 : struct dql dql;
621 : #endif
622 : } ____cacheline_aligned_in_smp;
623 :
624 : extern int sysctl_fb_tunnels_only_for_init_net;
625 : extern int sysctl_devconf_inherit_init_net;
626 :
627 : /*
628 : * sysctl_fb_tunnels_only_for_init_net == 0 : For all netns
629 : * == 1 : For initns only
630 : * == 2 : For none.
631 : */
632 : static inline bool net_has_fallback_tunnels(const struct net *net)
633 : {
634 : return !IS_ENABLED(CONFIG_SYSCTL) ||
635 : !sysctl_fb_tunnels_only_for_init_net ||
636 : (net == &init_net && sysctl_fb_tunnels_only_for_init_net == 1);
637 : }
638 :
639 3 : static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
640 : {
641 : #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
642 3 : return q->numa_node;
643 : #else
644 : return NUMA_NO_NODE;
645 : #endif
646 : }
647 :
648 4 : static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
649 : {
650 : #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
651 3 : q->numa_node = node;
652 : #endif
653 1 : }
654 :
655 : #ifdef CONFIG_RPS
656 : /*
657 : * This structure holds an RPS map which can be of variable length. The
658 : * map is an array of CPUs.
659 : */
660 : struct rps_map {
661 : unsigned int len;
662 : struct rcu_head rcu;
663 : u16 cpus[];
664 : };
665 : #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
666 :
667 : /*
668 : * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
669 : * tail pointer for that CPU's input queue at the time of last enqueue, and
670 : * a hardware filter index.
671 : */
672 : struct rps_dev_flow {
673 : u16 cpu;
674 : u16 filter;
675 : unsigned int last_qtail;
676 : };
677 : #define RPS_NO_FILTER 0xffff
678 :
679 : /*
680 : * The rps_dev_flow_table structure contains a table of flow mappings.
681 : */
682 : struct rps_dev_flow_table {
683 : unsigned int mask;
684 : struct rcu_head rcu;
685 : struct rps_dev_flow flows[];
686 : };
687 : #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
688 : ((_num) * sizeof(struct rps_dev_flow)))
689 :
690 : /*
691 : * The rps_sock_flow_table contains mappings of flows to the last CPU
692 : * on which they were processed by the application (set in recvmsg).
693 : * Each entry is a 32bit value. Upper part is the high-order bits
694 : * of flow hash, lower part is CPU number.
695 : * rps_cpu_mask is used to partition the space, depending on number of
696 : * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
697 : * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
698 : * meaning we use 32-6=26 bits for the hash.
699 : */
700 : struct rps_sock_flow_table {
701 : u32 mask;
702 :
703 : u32 ents[] ____cacheline_aligned_in_smp;
704 : };
705 : #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
706 :
707 : #define RPS_NO_CPU 0xffff
708 :
709 : extern u32 rps_cpu_mask;
710 : extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
711 :
712 0 : static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
713 : u32 hash)
714 : {
715 0 : if (table && hash) {
716 0 : unsigned int index = hash & table->mask;
717 0 : u32 val = hash & ~rps_cpu_mask;
718 :
719 : /* We only give a hint, preemption can change CPU under us */
720 0 : val |= raw_smp_processor_id();
721 :
722 0 : if (table->ents[index] != val)
723 0 : table->ents[index] = val;
724 : }
725 0 : }
726 :
727 : #ifdef CONFIG_RFS_ACCEL
728 : bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
729 : u16 filter_id);
730 : #endif
731 : #endif /* CONFIG_RPS */
732 :
733 : /* This structure contains an instance of an RX queue. */
734 : struct netdev_rx_queue {
735 : #ifdef CONFIG_RPS
736 : struct rps_map __rcu *rps_map;
737 : struct rps_dev_flow_table __rcu *rps_flow_table;
738 : #endif
739 : struct kobject kobj;
740 : struct net_device *dev;
741 : struct xdp_rxq_info xdp_rxq;
742 : #ifdef CONFIG_XDP_SOCKETS
743 : struct xsk_buff_pool *pool;
744 : #endif
745 : } ____cacheline_aligned_in_smp;
746 :
747 : /*
748 : * RX queue sysfs structures and functions.
749 : */
750 : struct rx_queue_attribute {
751 : struct attribute attr;
752 : ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
753 : ssize_t (*store)(struct netdev_rx_queue *queue,
754 : const char *buf, size_t len);
755 : };
756 :
757 : #ifdef CONFIG_XPS
758 : /*
759 : * This structure holds an XPS map which can be of variable length. The
760 : * map is an array of queues.
761 : */
762 : struct xps_map {
763 : unsigned int len;
764 : unsigned int alloc_len;
765 : struct rcu_head rcu;
766 : u16 queues[];
767 : };
768 : #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
769 : #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
770 : - sizeof(struct xps_map)) / sizeof(u16))
771 :
772 : /*
773 : * This structure holds all XPS maps for device. Maps are indexed by CPU.
774 : */
775 : struct xps_dev_maps {
776 : struct rcu_head rcu;
777 : struct xps_map __rcu *attr_map[]; /* Either CPUs map or RXQs map */
778 : };
779 :
780 : #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
781 : (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
782 :
783 : #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
784 : (_rxqs * (_tcs) * sizeof(struct xps_map *)))
785 :
786 : #endif /* CONFIG_XPS */
787 :
788 : #define TC_MAX_QUEUE 16
789 : #define TC_BITMASK 15
790 : /* HW offloaded queuing disciplines txq count and offset maps */
791 : struct netdev_tc_txq {
792 : u16 count;
793 : u16 offset;
794 : };
795 :
796 : #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
797 : /*
798 : * This structure is to hold information about the device
799 : * configured to run FCoE protocol stack.
800 : */
801 : struct netdev_fcoe_hbainfo {
802 : char manufacturer[64];
803 : char serial_number[64];
804 : char hardware_version[64];
805 : char driver_version[64];
806 : char optionrom_version[64];
807 : char firmware_version[64];
808 : char model[256];
809 : char model_description[256];
810 : };
811 : #endif
812 :
813 : #define MAX_PHYS_ITEM_ID_LEN 32
814 :
815 : /* This structure holds a unique identifier to identify some
816 : * physical item (port for example) used by a netdevice.
817 : */
818 : struct netdev_phys_item_id {
819 : unsigned char id[MAX_PHYS_ITEM_ID_LEN];
820 : unsigned char id_len;
821 : };
822 :
823 0 : static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
824 : struct netdev_phys_item_id *b)
825 : {
826 0 : return a->id_len == b->id_len &&
827 0 : memcmp(a->id, b->id, a->id_len) == 0;
828 : }
829 :
830 : typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
831 : struct sk_buff *skb,
832 : struct net_device *sb_dev);
833 :
834 : enum tc_setup_type {
835 : TC_SETUP_QDISC_MQPRIO,
836 : TC_SETUP_CLSU32,
837 : TC_SETUP_CLSFLOWER,
838 : TC_SETUP_CLSMATCHALL,
839 : TC_SETUP_CLSBPF,
840 : TC_SETUP_BLOCK,
841 : TC_SETUP_QDISC_CBS,
842 : TC_SETUP_QDISC_RED,
843 : TC_SETUP_QDISC_PRIO,
844 : TC_SETUP_QDISC_MQ,
845 : TC_SETUP_QDISC_ETF,
846 : TC_SETUP_ROOT_QDISC,
847 : TC_SETUP_QDISC_GRED,
848 : TC_SETUP_QDISC_TAPRIO,
849 : TC_SETUP_FT,
850 : TC_SETUP_QDISC_ETS,
851 : TC_SETUP_QDISC_TBF,
852 : TC_SETUP_QDISC_FIFO,
853 : TC_SETUP_QDISC_HTB,
854 : };
855 :
856 : /* These structures hold the attributes of bpf state that are being passed
857 : * to the netdevice through the bpf op.
858 : */
859 : enum bpf_netdev_command {
860 : /* Set or clear a bpf program used in the earliest stages of packet
861 : * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
862 : * is responsible for calling bpf_prog_put on any old progs that are
863 : * stored. In case of error, the callee need not release the new prog
864 : * reference, but on success it takes ownership and must bpf_prog_put
865 : * when it is no longer used.
866 : */
867 : XDP_SETUP_PROG,
868 : XDP_SETUP_PROG_HW,
869 : /* BPF program for offload callbacks, invoked at program load time. */
870 : BPF_OFFLOAD_MAP_ALLOC,
871 : BPF_OFFLOAD_MAP_FREE,
872 : XDP_SETUP_XSK_POOL,
873 : };
874 :
875 : struct bpf_prog_offload_ops;
876 : struct netlink_ext_ack;
877 : struct xdp_umem;
878 : struct xdp_dev_bulk_queue;
879 : struct bpf_xdp_link;
880 :
881 : enum bpf_xdp_mode {
882 : XDP_MODE_SKB = 0,
883 : XDP_MODE_DRV = 1,
884 : XDP_MODE_HW = 2,
885 : __MAX_XDP_MODE
886 : };
887 :
888 : struct bpf_xdp_entity {
889 : struct bpf_prog *prog;
890 : struct bpf_xdp_link *link;
891 : };
892 :
893 : struct netdev_bpf {
894 : enum bpf_netdev_command command;
895 : union {
896 : /* XDP_SETUP_PROG */
897 : struct {
898 : u32 flags;
899 : struct bpf_prog *prog;
900 : struct netlink_ext_ack *extack;
901 : };
902 : /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
903 : struct {
904 : struct bpf_offloaded_map *offmap;
905 : };
906 : /* XDP_SETUP_XSK_POOL */
907 : struct {
908 : struct xsk_buff_pool *pool;
909 : u16 queue_id;
910 : } xsk;
911 : };
912 : };
913 :
914 : /* Flags for ndo_xsk_wakeup. */
915 : #define XDP_WAKEUP_RX (1 << 0)
916 : #define XDP_WAKEUP_TX (1 << 1)
917 :
918 : #ifdef CONFIG_XFRM_OFFLOAD
919 : struct xfrmdev_ops {
920 : int (*xdo_dev_state_add) (struct xfrm_state *x);
921 : void (*xdo_dev_state_delete) (struct xfrm_state *x);
922 : void (*xdo_dev_state_free) (struct xfrm_state *x);
923 : bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
924 : struct xfrm_state *x);
925 : void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
926 : };
927 : #endif
928 :
929 : struct dev_ifalias {
930 : struct rcu_head rcuhead;
931 : char ifalias[];
932 : };
933 :
934 : struct devlink;
935 : struct tlsdev_ops;
936 :
937 : struct netdev_name_node {
938 : struct hlist_node hlist;
939 : struct list_head list;
940 : struct net_device *dev;
941 : const char *name;
942 : };
943 :
944 : int netdev_name_node_alt_create(struct net_device *dev, const char *name);
945 : int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
946 :
947 : struct netdev_net_notifier {
948 : struct list_head list;
949 : struct notifier_block *nb;
950 : };
951 :
952 : /*
953 : * This structure defines the management hooks for network devices.
954 : * The following hooks can be defined; unless noted otherwise, they are
955 : * optional and can be filled with a null pointer.
956 : *
957 : * int (*ndo_init)(struct net_device *dev);
958 : * This function is called once when a network device is registered.
959 : * The network device can use this for any late stage initialization
960 : * or semantic validation. It can fail with an error code which will
961 : * be propagated back to register_netdev.
962 : *
963 : * void (*ndo_uninit)(struct net_device *dev);
964 : * This function is called when device is unregistered or when registration
965 : * fails. It is not called if init fails.
966 : *
967 : * int (*ndo_open)(struct net_device *dev);
968 : * This function is called when a network device transitions to the up
969 : * state.
970 : *
971 : * int (*ndo_stop)(struct net_device *dev);
972 : * This function is called when a network device transitions to the down
973 : * state.
974 : *
975 : * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
976 : * struct net_device *dev);
977 : * Called when a packet needs to be transmitted.
978 : * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
979 : * the queue before that can happen; it's for obsolete devices and weird
980 : * corner cases, but the stack really does a non-trivial amount
981 : * of useless work if you return NETDEV_TX_BUSY.
982 : * Required; cannot be NULL.
983 : *
984 : * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
985 : * struct net_device *dev
986 : * netdev_features_t features);
987 : * Called by core transmit path to determine if device is capable of
988 : * performing offload operations on a given packet. This is to give
989 : * the device an opportunity to implement any restrictions that cannot
990 : * be otherwise expressed by feature flags. The check is called with
991 : * the set of features that the stack has calculated and it returns
992 : * those the driver believes to be appropriate.
993 : *
994 : * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
995 : * struct net_device *sb_dev);
996 : * Called to decide which queue to use when device supports multiple
997 : * transmit queues.
998 : *
999 : * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
1000 : * This function is called to allow device receiver to make
1001 : * changes to configuration when multicast or promiscuous is enabled.
1002 : *
1003 : * void (*ndo_set_rx_mode)(struct net_device *dev);
1004 : * This function is called device changes address list filtering.
1005 : * If driver handles unicast address filtering, it should set
1006 : * IFF_UNICAST_FLT in its priv_flags.
1007 : *
1008 : * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1009 : * This function is called when the Media Access Control address
1010 : * needs to be changed. If this interface is not defined, the
1011 : * MAC address can not be changed.
1012 : *
1013 : * int (*ndo_validate_addr)(struct net_device *dev);
1014 : * Test if Media Access Control address is valid for the device.
1015 : *
1016 : * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1017 : * Called when a user requests an ioctl which can't be handled by
1018 : * the generic interface code. If not defined ioctls return
1019 : * not supported error code.
1020 : *
1021 : * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1022 : * Used to set network devices bus interface parameters. This interface
1023 : * is retained for legacy reasons; new devices should use the bus
1024 : * interface (PCI) for low level management.
1025 : *
1026 : * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1027 : * Called when a user wants to change the Maximum Transfer Unit
1028 : * of a device.
1029 : *
1030 : * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1031 : * Callback used when the transmitter has not made any progress
1032 : * for dev->watchdog ticks.
1033 : *
1034 : * void (*ndo_get_stats64)(struct net_device *dev,
1035 : * struct rtnl_link_stats64 *storage);
1036 : * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1037 : * Called when a user wants to get the network device usage
1038 : * statistics. Drivers must do one of the following:
1039 : * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1040 : * rtnl_link_stats64 structure passed by the caller.
1041 : * 2. Define @ndo_get_stats to update a net_device_stats structure
1042 : * (which should normally be dev->stats) and return a pointer to
1043 : * it. The structure may be changed asynchronously only if each
1044 : * field is written atomically.
1045 : * 3. Update dev->stats asynchronously and atomically, and define
1046 : * neither operation.
1047 : *
1048 : * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1049 : * Return true if this device supports offload stats of this attr_id.
1050 : *
1051 : * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1052 : * void *attr_data)
1053 : * Get statistics for offload operations by attr_id. Write it into the
1054 : * attr_data pointer.
1055 : *
1056 : * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1057 : * If device supports VLAN filtering this function is called when a
1058 : * VLAN id is registered.
1059 : *
1060 : * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1061 : * If device supports VLAN filtering this function is called when a
1062 : * VLAN id is unregistered.
1063 : *
1064 : * void (*ndo_poll_controller)(struct net_device *dev);
1065 : *
1066 : * SR-IOV management functions.
1067 : * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1068 : * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1069 : * u8 qos, __be16 proto);
1070 : * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1071 : * int max_tx_rate);
1072 : * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1073 : * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1074 : * int (*ndo_get_vf_config)(struct net_device *dev,
1075 : * int vf, struct ifla_vf_info *ivf);
1076 : * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1077 : * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1078 : * struct nlattr *port[]);
1079 : *
1080 : * Enable or disable the VF ability to query its RSS Redirection Table and
1081 : * Hash Key. This is needed since on some devices VF share this information
1082 : * with PF and querying it may introduce a theoretical security risk.
1083 : * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1084 : * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1085 : * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1086 : * void *type_data);
1087 : * Called to setup any 'tc' scheduler, classifier or action on @dev.
1088 : * This is always called from the stack with the rtnl lock held and netif
1089 : * tx queues stopped. This allows the netdevice to perform queue
1090 : * management safely.
1091 : *
1092 : * Fiber Channel over Ethernet (FCoE) offload functions.
1093 : * int (*ndo_fcoe_enable)(struct net_device *dev);
1094 : * Called when the FCoE protocol stack wants to start using LLD for FCoE
1095 : * so the underlying device can perform whatever needed configuration or
1096 : * initialization to support acceleration of FCoE traffic.
1097 : *
1098 : * int (*ndo_fcoe_disable)(struct net_device *dev);
1099 : * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1100 : * so the underlying device can perform whatever needed clean-ups to
1101 : * stop supporting acceleration of FCoE traffic.
1102 : *
1103 : * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1104 : * struct scatterlist *sgl, unsigned int sgc);
1105 : * Called when the FCoE Initiator wants to initialize an I/O that
1106 : * is a possible candidate for Direct Data Placement (DDP). The LLD can
1107 : * perform necessary setup and returns 1 to indicate the device is set up
1108 : * successfully to perform DDP on this I/O, otherwise this returns 0.
1109 : *
1110 : * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1111 : * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1112 : * indicated by the FC exchange id 'xid', so the underlying device can
1113 : * clean up and reuse resources for later DDP requests.
1114 : *
1115 : * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1116 : * struct scatterlist *sgl, unsigned int sgc);
1117 : * Called when the FCoE Target wants to initialize an I/O that
1118 : * is a possible candidate for Direct Data Placement (DDP). The LLD can
1119 : * perform necessary setup and returns 1 to indicate the device is set up
1120 : * successfully to perform DDP on this I/O, otherwise this returns 0.
1121 : *
1122 : * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1123 : * struct netdev_fcoe_hbainfo *hbainfo);
1124 : * Called when the FCoE Protocol stack wants information on the underlying
1125 : * device. This information is utilized by the FCoE protocol stack to
1126 : * register attributes with Fiber Channel management service as per the
1127 : * FC-GS Fabric Device Management Information(FDMI) specification.
1128 : *
1129 : * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1130 : * Called when the underlying device wants to override default World Wide
1131 : * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1132 : * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1133 : * protocol stack to use.
1134 : *
1135 : * RFS acceleration.
1136 : * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1137 : * u16 rxq_index, u32 flow_id);
1138 : * Set hardware filter for RFS. rxq_index is the target queue index;
1139 : * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1140 : * Return the filter ID on success, or a negative error code.
1141 : *
1142 : * Slave management functions (for bridge, bonding, etc).
1143 : * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1144 : * Called to make another netdev an underling.
1145 : *
1146 : * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1147 : * Called to release previously enslaved netdev.
1148 : *
1149 : * struct net_device *(*ndo_get_xmit_slave)(struct net_device *dev,
1150 : * struct sk_buff *skb,
1151 : * bool all_slaves);
1152 : * Get the xmit slave of master device. If all_slaves is true, function
1153 : * assume all the slaves can transmit.
1154 : *
1155 : * Feature/offload setting functions.
1156 : * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1157 : * netdev_features_t features);
1158 : * Adjusts the requested feature flags according to device-specific
1159 : * constraints, and returns the resulting flags. Must not modify
1160 : * the device state.
1161 : *
1162 : * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1163 : * Called to update device configuration to new features. Passed
1164 : * feature set might be less than what was returned by ndo_fix_features()).
1165 : * Must return >0 or -errno if it changed dev->features itself.
1166 : *
1167 : * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1168 : * struct net_device *dev,
1169 : * const unsigned char *addr, u16 vid, u16 flags,
1170 : * struct netlink_ext_ack *extack);
1171 : * Adds an FDB entry to dev for addr.
1172 : * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1173 : * struct net_device *dev,
1174 : * const unsigned char *addr, u16 vid)
1175 : * Deletes the FDB entry from dev coresponding to addr.
1176 : * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1177 : * struct net_device *dev, struct net_device *filter_dev,
1178 : * int *idx)
1179 : * Used to add FDB entries to dump requests. Implementers should add
1180 : * entries to skb and update idx with the number of entries.
1181 : *
1182 : * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1183 : * u16 flags, struct netlink_ext_ack *extack)
1184 : * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1185 : * struct net_device *dev, u32 filter_mask,
1186 : * int nlflags)
1187 : * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1188 : * u16 flags);
1189 : *
1190 : * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1191 : * Called to change device carrier. Soft-devices (like dummy, team, etc)
1192 : * which do not represent real hardware may define this to allow their
1193 : * userspace components to manage their virtual carrier state. Devices
1194 : * that determine carrier state from physical hardware properties (eg
1195 : * network cables) or protocol-dependent mechanisms (eg
1196 : * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1197 : *
1198 : * int (*ndo_get_phys_port_id)(struct net_device *dev,
1199 : * struct netdev_phys_item_id *ppid);
1200 : * Called to get ID of physical port of this device. If driver does
1201 : * not implement this, it is assumed that the hw is not able to have
1202 : * multiple net devices on single physical port.
1203 : *
1204 : * int (*ndo_get_port_parent_id)(struct net_device *dev,
1205 : * struct netdev_phys_item_id *ppid)
1206 : * Called to get the parent ID of the physical port of this device.
1207 : *
1208 : * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1209 : * struct net_device *dev)
1210 : * Called by upper layer devices to accelerate switching or other
1211 : * station functionality into hardware. 'pdev is the lowerdev
1212 : * to use for the offload and 'dev' is the net device that will
1213 : * back the offload. Returns a pointer to the private structure
1214 : * the upper layer will maintain.
1215 : * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1216 : * Called by upper layer device to delete the station created
1217 : * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1218 : * the station and priv is the structure returned by the add
1219 : * operation.
1220 : * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1221 : * int queue_index, u32 maxrate);
1222 : * Called when a user wants to set a max-rate limitation of specific
1223 : * TX queue.
1224 : * int (*ndo_get_iflink)(const struct net_device *dev);
1225 : * Called to get the iflink value of this device.
1226 : * void (*ndo_change_proto_down)(struct net_device *dev,
1227 : * bool proto_down);
1228 : * This function is used to pass protocol port error state information
1229 : * to the switch driver. The switch driver can react to the proto_down
1230 : * by doing a phys down on the associated switch port.
1231 : * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1232 : * This function is used to get egress tunnel information for given skb.
1233 : * This is useful for retrieving outer tunnel header parameters while
1234 : * sampling packet.
1235 : * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1236 : * This function is used to specify the headroom that the skb must
1237 : * consider when allocation skb during packet reception. Setting
1238 : * appropriate rx headroom value allows avoiding skb head copy on
1239 : * forward. Setting a negative value resets the rx headroom to the
1240 : * default value.
1241 : * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1242 : * This function is used to set or query state related to XDP on the
1243 : * netdevice and manage BPF offload. See definition of
1244 : * enum bpf_netdev_command for details.
1245 : * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1246 : * u32 flags);
1247 : * This function is used to submit @n XDP packets for transmit on a
1248 : * netdevice. Returns number of frames successfully transmitted, frames
1249 : * that got dropped are freed/returned via xdp_return_frame().
1250 : * Returns negative number, means general error invoking ndo, meaning
1251 : * no frames were xmit'ed and core-caller will free all frames.
1252 : * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1253 : * This function is used to wake up the softirq, ksoftirqd or kthread
1254 : * responsible for sending and/or receiving packets on a specific
1255 : * queue id bound to an AF_XDP socket. The flags field specifies if
1256 : * only RX, only Tx, or both should be woken up using the flags
1257 : * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1258 : * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1259 : * Get devlink port instance associated with a given netdev.
1260 : * Called with a reference on the netdevice and devlink locks only,
1261 : * rtnl_lock is not held.
1262 : * int (*ndo_tunnel_ctl)(struct net_device *dev, struct ip_tunnel_parm *p,
1263 : * int cmd);
1264 : * Add, change, delete or get information on an IPv4 tunnel.
1265 : * struct net_device *(*ndo_get_peer_dev)(struct net_device *dev);
1266 : * If a device is paired with a peer device, return the peer instance.
1267 : * The caller must be under RCU read context.
1268 : */
1269 : struct net_device_ops {
1270 : int (*ndo_init)(struct net_device *dev);
1271 : void (*ndo_uninit)(struct net_device *dev);
1272 : int (*ndo_open)(struct net_device *dev);
1273 : int (*ndo_stop)(struct net_device *dev);
1274 : netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1275 : struct net_device *dev);
1276 : netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1277 : struct net_device *dev,
1278 : netdev_features_t features);
1279 : u16 (*ndo_select_queue)(struct net_device *dev,
1280 : struct sk_buff *skb,
1281 : struct net_device *sb_dev);
1282 : void (*ndo_change_rx_flags)(struct net_device *dev,
1283 : int flags);
1284 : void (*ndo_set_rx_mode)(struct net_device *dev);
1285 : int (*ndo_set_mac_address)(struct net_device *dev,
1286 : void *addr);
1287 : int (*ndo_validate_addr)(struct net_device *dev);
1288 : int (*ndo_do_ioctl)(struct net_device *dev,
1289 : struct ifreq *ifr, int cmd);
1290 : int (*ndo_set_config)(struct net_device *dev,
1291 : struct ifmap *map);
1292 : int (*ndo_change_mtu)(struct net_device *dev,
1293 : int new_mtu);
1294 : int (*ndo_neigh_setup)(struct net_device *dev,
1295 : struct neigh_parms *);
1296 : void (*ndo_tx_timeout) (struct net_device *dev,
1297 : unsigned int txqueue);
1298 :
1299 : void (*ndo_get_stats64)(struct net_device *dev,
1300 : struct rtnl_link_stats64 *storage);
1301 : bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1302 : int (*ndo_get_offload_stats)(int attr_id,
1303 : const struct net_device *dev,
1304 : void *attr_data);
1305 : struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1306 :
1307 : int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1308 : __be16 proto, u16 vid);
1309 : int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1310 : __be16 proto, u16 vid);
1311 : #ifdef CONFIG_NET_POLL_CONTROLLER
1312 : void (*ndo_poll_controller)(struct net_device *dev);
1313 : int (*ndo_netpoll_setup)(struct net_device *dev,
1314 : struct netpoll_info *info);
1315 : void (*ndo_netpoll_cleanup)(struct net_device *dev);
1316 : #endif
1317 : int (*ndo_set_vf_mac)(struct net_device *dev,
1318 : int queue, u8 *mac);
1319 : int (*ndo_set_vf_vlan)(struct net_device *dev,
1320 : int queue, u16 vlan,
1321 : u8 qos, __be16 proto);
1322 : int (*ndo_set_vf_rate)(struct net_device *dev,
1323 : int vf, int min_tx_rate,
1324 : int max_tx_rate);
1325 : int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1326 : int vf, bool setting);
1327 : int (*ndo_set_vf_trust)(struct net_device *dev,
1328 : int vf, bool setting);
1329 : int (*ndo_get_vf_config)(struct net_device *dev,
1330 : int vf,
1331 : struct ifla_vf_info *ivf);
1332 : int (*ndo_set_vf_link_state)(struct net_device *dev,
1333 : int vf, int link_state);
1334 : int (*ndo_get_vf_stats)(struct net_device *dev,
1335 : int vf,
1336 : struct ifla_vf_stats
1337 : *vf_stats);
1338 : int (*ndo_set_vf_port)(struct net_device *dev,
1339 : int vf,
1340 : struct nlattr *port[]);
1341 : int (*ndo_get_vf_port)(struct net_device *dev,
1342 : int vf, struct sk_buff *skb);
1343 : int (*ndo_get_vf_guid)(struct net_device *dev,
1344 : int vf,
1345 : struct ifla_vf_guid *node_guid,
1346 : struct ifla_vf_guid *port_guid);
1347 : int (*ndo_set_vf_guid)(struct net_device *dev,
1348 : int vf, u64 guid,
1349 : int guid_type);
1350 : int (*ndo_set_vf_rss_query_en)(
1351 : struct net_device *dev,
1352 : int vf, bool setting);
1353 : int (*ndo_setup_tc)(struct net_device *dev,
1354 : enum tc_setup_type type,
1355 : void *type_data);
1356 : #if IS_ENABLED(CONFIG_FCOE)
1357 : int (*ndo_fcoe_enable)(struct net_device *dev);
1358 : int (*ndo_fcoe_disable)(struct net_device *dev);
1359 : int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1360 : u16 xid,
1361 : struct scatterlist *sgl,
1362 : unsigned int sgc);
1363 : int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1364 : u16 xid);
1365 : int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1366 : u16 xid,
1367 : struct scatterlist *sgl,
1368 : unsigned int sgc);
1369 : int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1370 : struct netdev_fcoe_hbainfo *hbainfo);
1371 : #endif
1372 :
1373 : #if IS_ENABLED(CONFIG_LIBFCOE)
1374 : #define NETDEV_FCOE_WWNN 0
1375 : #define NETDEV_FCOE_WWPN 1
1376 : int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1377 : u64 *wwn, int type);
1378 : #endif
1379 :
1380 : #ifdef CONFIG_RFS_ACCEL
1381 : int (*ndo_rx_flow_steer)(struct net_device *dev,
1382 : const struct sk_buff *skb,
1383 : u16 rxq_index,
1384 : u32 flow_id);
1385 : #endif
1386 : int (*ndo_add_slave)(struct net_device *dev,
1387 : struct net_device *slave_dev,
1388 : struct netlink_ext_ack *extack);
1389 : int (*ndo_del_slave)(struct net_device *dev,
1390 : struct net_device *slave_dev);
1391 : struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev,
1392 : struct sk_buff *skb,
1393 : bool all_slaves);
1394 : struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev,
1395 : struct sock *sk);
1396 : netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1397 : netdev_features_t features);
1398 : int (*ndo_set_features)(struct net_device *dev,
1399 : netdev_features_t features);
1400 : int (*ndo_neigh_construct)(struct net_device *dev,
1401 : struct neighbour *n);
1402 : void (*ndo_neigh_destroy)(struct net_device *dev,
1403 : struct neighbour *n);
1404 :
1405 : int (*ndo_fdb_add)(struct ndmsg *ndm,
1406 : struct nlattr *tb[],
1407 : struct net_device *dev,
1408 : const unsigned char *addr,
1409 : u16 vid,
1410 : u16 flags,
1411 : struct netlink_ext_ack *extack);
1412 : int (*ndo_fdb_del)(struct ndmsg *ndm,
1413 : struct nlattr *tb[],
1414 : struct net_device *dev,
1415 : const unsigned char *addr,
1416 : u16 vid);
1417 : int (*ndo_fdb_dump)(struct sk_buff *skb,
1418 : struct netlink_callback *cb,
1419 : struct net_device *dev,
1420 : struct net_device *filter_dev,
1421 : int *idx);
1422 : int (*ndo_fdb_get)(struct sk_buff *skb,
1423 : struct nlattr *tb[],
1424 : struct net_device *dev,
1425 : const unsigned char *addr,
1426 : u16 vid, u32 portid, u32 seq,
1427 : struct netlink_ext_ack *extack);
1428 : int (*ndo_bridge_setlink)(struct net_device *dev,
1429 : struct nlmsghdr *nlh,
1430 : u16 flags,
1431 : struct netlink_ext_ack *extack);
1432 : int (*ndo_bridge_getlink)(struct sk_buff *skb,
1433 : u32 pid, u32 seq,
1434 : struct net_device *dev,
1435 : u32 filter_mask,
1436 : int nlflags);
1437 : int (*ndo_bridge_dellink)(struct net_device *dev,
1438 : struct nlmsghdr *nlh,
1439 : u16 flags);
1440 : int (*ndo_change_carrier)(struct net_device *dev,
1441 : bool new_carrier);
1442 : int (*ndo_get_phys_port_id)(struct net_device *dev,
1443 : struct netdev_phys_item_id *ppid);
1444 : int (*ndo_get_port_parent_id)(struct net_device *dev,
1445 : struct netdev_phys_item_id *ppid);
1446 : int (*ndo_get_phys_port_name)(struct net_device *dev,
1447 : char *name, size_t len);
1448 : void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1449 : struct net_device *dev);
1450 : void (*ndo_dfwd_del_station)(struct net_device *pdev,
1451 : void *priv);
1452 :
1453 : int (*ndo_set_tx_maxrate)(struct net_device *dev,
1454 : int queue_index,
1455 : u32 maxrate);
1456 : int (*ndo_get_iflink)(const struct net_device *dev);
1457 : int (*ndo_change_proto_down)(struct net_device *dev,
1458 : bool proto_down);
1459 : int (*ndo_fill_metadata_dst)(struct net_device *dev,
1460 : struct sk_buff *skb);
1461 : void (*ndo_set_rx_headroom)(struct net_device *dev,
1462 : int needed_headroom);
1463 : int (*ndo_bpf)(struct net_device *dev,
1464 : struct netdev_bpf *bpf);
1465 : int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1466 : struct xdp_frame **xdp,
1467 : u32 flags);
1468 : int (*ndo_xsk_wakeup)(struct net_device *dev,
1469 : u32 queue_id, u32 flags);
1470 : struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1471 : int (*ndo_tunnel_ctl)(struct net_device *dev,
1472 : struct ip_tunnel_parm *p, int cmd);
1473 : struct net_device * (*ndo_get_peer_dev)(struct net_device *dev);
1474 : };
1475 :
1476 : /**
1477 : * enum netdev_priv_flags - &struct net_device priv_flags
1478 : *
1479 : * These are the &struct net_device, they are only set internally
1480 : * by drivers and used in the kernel. These flags are invisible to
1481 : * userspace; this means that the order of these flags can change
1482 : * during any kernel release.
1483 : *
1484 : * You should have a pretty good reason to be extending these flags.
1485 : *
1486 : * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1487 : * @IFF_EBRIDGE: Ethernet bridging device
1488 : * @IFF_BONDING: bonding master or slave
1489 : * @IFF_ISATAP: ISATAP interface (RFC4214)
1490 : * @IFF_WAN_HDLC: WAN HDLC device
1491 : * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1492 : * release skb->dst
1493 : * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1494 : * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1495 : * @IFF_MACVLAN_PORT: device used as macvlan port
1496 : * @IFF_BRIDGE_PORT: device used as bridge port
1497 : * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1498 : * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1499 : * @IFF_UNICAST_FLT: Supports unicast filtering
1500 : * @IFF_TEAM_PORT: device used as team port
1501 : * @IFF_SUPP_NOFCS: device supports sending custom FCS
1502 : * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1503 : * change when it's running
1504 : * @IFF_MACVLAN: Macvlan device
1505 : * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1506 : * underlying stacked devices
1507 : * @IFF_L3MDEV_MASTER: device is an L3 master device
1508 : * @IFF_NO_QUEUE: device can run without qdisc attached
1509 : * @IFF_OPENVSWITCH: device is a Open vSwitch master
1510 : * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1511 : * @IFF_TEAM: device is a team device
1512 : * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1513 : * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1514 : * entity (i.e. the master device for bridged veth)
1515 : * @IFF_MACSEC: device is a MACsec device
1516 : * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1517 : * @IFF_FAILOVER: device is a failover master device
1518 : * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1519 : * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1520 : * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1521 : */
1522 : enum netdev_priv_flags {
1523 : IFF_802_1Q_VLAN = 1<<0,
1524 : IFF_EBRIDGE = 1<<1,
1525 : IFF_BONDING = 1<<2,
1526 : IFF_ISATAP = 1<<3,
1527 : IFF_WAN_HDLC = 1<<4,
1528 : IFF_XMIT_DST_RELEASE = 1<<5,
1529 : IFF_DONT_BRIDGE = 1<<6,
1530 : IFF_DISABLE_NETPOLL = 1<<7,
1531 : IFF_MACVLAN_PORT = 1<<8,
1532 : IFF_BRIDGE_PORT = 1<<9,
1533 : IFF_OVS_DATAPATH = 1<<10,
1534 : IFF_TX_SKB_SHARING = 1<<11,
1535 : IFF_UNICAST_FLT = 1<<12,
1536 : IFF_TEAM_PORT = 1<<13,
1537 : IFF_SUPP_NOFCS = 1<<14,
1538 : IFF_LIVE_ADDR_CHANGE = 1<<15,
1539 : IFF_MACVLAN = 1<<16,
1540 : IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1541 : IFF_L3MDEV_MASTER = 1<<18,
1542 : IFF_NO_QUEUE = 1<<19,
1543 : IFF_OPENVSWITCH = 1<<20,
1544 : IFF_L3MDEV_SLAVE = 1<<21,
1545 : IFF_TEAM = 1<<22,
1546 : IFF_RXFH_CONFIGURED = 1<<23,
1547 : IFF_PHONY_HEADROOM = 1<<24,
1548 : IFF_MACSEC = 1<<25,
1549 : IFF_NO_RX_HANDLER = 1<<26,
1550 : IFF_FAILOVER = 1<<27,
1551 : IFF_FAILOVER_SLAVE = 1<<28,
1552 : IFF_L3MDEV_RX_HANDLER = 1<<29,
1553 : IFF_LIVE_RENAME_OK = 1<<30,
1554 : };
1555 :
1556 : #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1557 : #define IFF_EBRIDGE IFF_EBRIDGE
1558 : #define IFF_BONDING IFF_BONDING
1559 : #define IFF_ISATAP IFF_ISATAP
1560 : #define IFF_WAN_HDLC IFF_WAN_HDLC
1561 : #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1562 : #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1563 : #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1564 : #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1565 : #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1566 : #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1567 : #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1568 : #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1569 : #define IFF_TEAM_PORT IFF_TEAM_PORT
1570 : #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1571 : #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1572 : #define IFF_MACVLAN IFF_MACVLAN
1573 : #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1574 : #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1575 : #define IFF_NO_QUEUE IFF_NO_QUEUE
1576 : #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1577 : #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1578 : #define IFF_TEAM IFF_TEAM
1579 : #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1580 : #define IFF_MACSEC IFF_MACSEC
1581 : #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1582 : #define IFF_FAILOVER IFF_FAILOVER
1583 : #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1584 : #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1585 : #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1586 :
1587 : /* Specifies the type of the struct net_device::ml_priv pointer */
1588 : enum netdev_ml_priv_type {
1589 : ML_PRIV_NONE,
1590 : ML_PRIV_CAN,
1591 : };
1592 :
1593 : /**
1594 : * struct net_device - The DEVICE structure.
1595 : *
1596 : * Actually, this whole structure is a big mistake. It mixes I/O
1597 : * data with strictly "high-level" data, and it has to know about
1598 : * almost every data structure used in the INET module.
1599 : *
1600 : * @name: This is the first field of the "visible" part of this structure
1601 : * (i.e. as seen by users in the "Space.c" file). It is the name
1602 : * of the interface.
1603 : *
1604 : * @name_node: Name hashlist node
1605 : * @ifalias: SNMP alias
1606 : * @mem_end: Shared memory end
1607 : * @mem_start: Shared memory start
1608 : * @base_addr: Device I/O address
1609 : * @irq: Device IRQ number
1610 : *
1611 : * @state: Generic network queuing layer state, see netdev_state_t
1612 : * @dev_list: The global list of network devices
1613 : * @napi_list: List entry used for polling NAPI devices
1614 : * @unreg_list: List entry when we are unregistering the
1615 : * device; see the function unregister_netdev
1616 : * @close_list: List entry used when we are closing the device
1617 : * @ptype_all: Device-specific packet handlers for all protocols
1618 : * @ptype_specific: Device-specific, protocol-specific packet handlers
1619 : *
1620 : * @adj_list: Directly linked devices, like slaves for bonding
1621 : * @features: Currently active device features
1622 : * @hw_features: User-changeable features
1623 : *
1624 : * @wanted_features: User-requested features
1625 : * @vlan_features: Mask of features inheritable by VLAN devices
1626 : *
1627 : * @hw_enc_features: Mask of features inherited by encapsulating devices
1628 : * This field indicates what encapsulation
1629 : * offloads the hardware is capable of doing,
1630 : * and drivers will need to set them appropriately.
1631 : *
1632 : * @mpls_features: Mask of features inheritable by MPLS
1633 : * @gso_partial_features: value(s) from NETIF_F_GSO\*
1634 : *
1635 : * @ifindex: interface index
1636 : * @group: The group the device belongs to
1637 : *
1638 : * @stats: Statistics struct, which was left as a legacy, use
1639 : * rtnl_link_stats64 instead
1640 : *
1641 : * @rx_dropped: Dropped packets by core network,
1642 : * do not use this in drivers
1643 : * @tx_dropped: Dropped packets by core network,
1644 : * do not use this in drivers
1645 : * @rx_nohandler: nohandler dropped packets by core network on
1646 : * inactive devices, do not use this in drivers
1647 : * @carrier_up_count: Number of times the carrier has been up
1648 : * @carrier_down_count: Number of times the carrier has been down
1649 : *
1650 : * @wireless_handlers: List of functions to handle Wireless Extensions,
1651 : * instead of ioctl,
1652 : * see <net/iw_handler.h> for details.
1653 : * @wireless_data: Instance data managed by the core of wireless extensions
1654 : *
1655 : * @netdev_ops: Includes several pointers to callbacks,
1656 : * if one wants to override the ndo_*() functions
1657 : * @ethtool_ops: Management operations
1658 : * @l3mdev_ops: Layer 3 master device operations
1659 : * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1660 : * discovery handling. Necessary for e.g. 6LoWPAN.
1661 : * @xfrmdev_ops: Transformation offload operations
1662 : * @tlsdev_ops: Transport Layer Security offload operations
1663 : * @header_ops: Includes callbacks for creating,parsing,caching,etc
1664 : * of Layer 2 headers.
1665 : *
1666 : * @flags: Interface flags (a la BSD)
1667 : * @priv_flags: Like 'flags' but invisible to userspace,
1668 : * see if.h for the definitions
1669 : * @gflags: Global flags ( kept as legacy )
1670 : * @padded: How much padding added by alloc_netdev()
1671 : * @operstate: RFC2863 operstate
1672 : * @link_mode: Mapping policy to operstate
1673 : * @if_port: Selectable AUI, TP, ...
1674 : * @dma: DMA channel
1675 : * @mtu: Interface MTU value
1676 : * @min_mtu: Interface Minimum MTU value
1677 : * @max_mtu: Interface Maximum MTU value
1678 : * @type: Interface hardware type
1679 : * @hard_header_len: Maximum hardware header length.
1680 : * @min_header_len: Minimum hardware header length
1681 : *
1682 : * @needed_headroom: Extra headroom the hardware may need, but not in all
1683 : * cases can this be guaranteed
1684 : * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1685 : * cases can this be guaranteed. Some cases also use
1686 : * LL_MAX_HEADER instead to allocate the skb
1687 : *
1688 : * interface address info:
1689 : *
1690 : * @perm_addr: Permanent hw address
1691 : * @addr_assign_type: Hw address assignment type
1692 : * @addr_len: Hardware address length
1693 : * @upper_level: Maximum depth level of upper devices.
1694 : * @lower_level: Maximum depth level of lower devices.
1695 : * @neigh_priv_len: Used in neigh_alloc()
1696 : * @dev_id: Used to differentiate devices that share
1697 : * the same link layer address
1698 : * @dev_port: Used to differentiate devices that share
1699 : * the same function
1700 : * @addr_list_lock: XXX: need comments on this one
1701 : * @name_assign_type: network interface name assignment type
1702 : * @uc_promisc: Counter that indicates promiscuous mode
1703 : * has been enabled due to the need to listen to
1704 : * additional unicast addresses in a device that
1705 : * does not implement ndo_set_rx_mode()
1706 : * @uc: unicast mac addresses
1707 : * @mc: multicast mac addresses
1708 : * @dev_addrs: list of device hw addresses
1709 : * @queues_kset: Group of all Kobjects in the Tx and RX queues
1710 : * @promiscuity: Number of times the NIC is told to work in
1711 : * promiscuous mode; if it becomes 0 the NIC will
1712 : * exit promiscuous mode
1713 : * @allmulti: Counter, enables or disables allmulticast mode
1714 : *
1715 : * @vlan_info: VLAN info
1716 : * @dsa_ptr: dsa specific data
1717 : * @tipc_ptr: TIPC specific data
1718 : * @atalk_ptr: AppleTalk link
1719 : * @ip_ptr: IPv4 specific data
1720 : * @dn_ptr: DECnet specific data
1721 : * @ip6_ptr: IPv6 specific data
1722 : * @ax25_ptr: AX.25 specific data
1723 : * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1724 : * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
1725 : * device struct
1726 : * @mpls_ptr: mpls_dev struct pointer
1727 : *
1728 : * @dev_addr: Hw address (before bcast,
1729 : * because most packets are unicast)
1730 : *
1731 : * @_rx: Array of RX queues
1732 : * @num_rx_queues: Number of RX queues
1733 : * allocated at register_netdev() time
1734 : * @real_num_rx_queues: Number of RX queues currently active in device
1735 : * @xdp_prog: XDP sockets filter program pointer
1736 : * @gro_flush_timeout: timeout for GRO layer in NAPI
1737 : * @napi_defer_hard_irqs: If not zero, provides a counter that would
1738 : * allow to avoid NIC hard IRQ, on busy queues.
1739 : *
1740 : * @rx_handler: handler for received packets
1741 : * @rx_handler_data: XXX: need comments on this one
1742 : * @miniq_ingress: ingress/clsact qdisc specific data for
1743 : * ingress processing
1744 : * @ingress_queue: XXX: need comments on this one
1745 : * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1746 : * @broadcast: hw bcast address
1747 : *
1748 : * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1749 : * indexed by RX queue number. Assigned by driver.
1750 : * This must only be set if the ndo_rx_flow_steer
1751 : * operation is defined
1752 : * @index_hlist: Device index hash chain
1753 : *
1754 : * @_tx: Array of TX queues
1755 : * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1756 : * @real_num_tx_queues: Number of TX queues currently active in device
1757 : * @qdisc: Root qdisc from userspace point of view
1758 : * @tx_queue_len: Max frames per queue allowed
1759 : * @tx_global_lock: XXX: need comments on this one
1760 : * @xdp_bulkq: XDP device bulk queue
1761 : * @xps_cpus_map: all CPUs map for XPS device
1762 : * @xps_rxqs_map: all RXQs map for XPS device
1763 : *
1764 : * @xps_maps: XXX: need comments on this one
1765 : * @miniq_egress: clsact qdisc specific data for
1766 : * egress processing
1767 : * @qdisc_hash: qdisc hash table
1768 : * @watchdog_timeo: Represents the timeout that is used by
1769 : * the watchdog (see dev_watchdog())
1770 : * @watchdog_timer: List of timers
1771 : *
1772 : * @proto_down_reason: reason a netdev interface is held down
1773 : * @pcpu_refcnt: Number of references to this device
1774 : * @todo_list: Delayed register/unregister
1775 : * @link_watch_list: XXX: need comments on this one
1776 : *
1777 : * @reg_state: Register/unregister state machine
1778 : * @dismantle: Device is going to be freed
1779 : * @rtnl_link_state: This enum represents the phases of creating
1780 : * a new link
1781 : *
1782 : * @needs_free_netdev: Should unregister perform free_netdev?
1783 : * @priv_destructor: Called from unregister
1784 : * @npinfo: XXX: need comments on this one
1785 : * @nd_net: Network namespace this network device is inside
1786 : *
1787 : * @ml_priv: Mid-layer private
1788 : * @ml_priv_type: Mid-layer private type
1789 : * @lstats: Loopback statistics
1790 : * @tstats: Tunnel statistics
1791 : * @dstats: Dummy statistics
1792 : * @vstats: Virtual ethernet statistics
1793 : *
1794 : * @garp_port: GARP
1795 : * @mrp_port: MRP
1796 : *
1797 : * @dev: Class/net/name entry
1798 : * @sysfs_groups: Space for optional device, statistics and wireless
1799 : * sysfs groups
1800 : *
1801 : * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1802 : * @rtnl_link_ops: Rtnl_link_ops
1803 : *
1804 : * @gso_max_size: Maximum size of generic segmentation offload
1805 : * @gso_max_segs: Maximum number of segments that can be passed to the
1806 : * NIC for GSO
1807 : *
1808 : * @dcbnl_ops: Data Center Bridging netlink ops
1809 : * @num_tc: Number of traffic classes in the net device
1810 : * @tc_to_txq: XXX: need comments on this one
1811 : * @prio_tc_map: XXX: need comments on this one
1812 : *
1813 : * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1814 : *
1815 : * @priomap: XXX: need comments on this one
1816 : * @phydev: Physical device may attach itself
1817 : * for hardware timestamping
1818 : * @sfp_bus: attached &struct sfp_bus structure.
1819 : *
1820 : * @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
1821 : * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1822 : *
1823 : * @proto_down: protocol port state information can be sent to the
1824 : * switch driver and used to set the phys state of the
1825 : * switch port.
1826 : *
1827 : * @wol_enabled: Wake-on-LAN is enabled
1828 : *
1829 : * @threaded: napi threaded mode is enabled
1830 : *
1831 : * @net_notifier_list: List of per-net netdev notifier block
1832 : * that follow this device when it is moved
1833 : * to another network namespace.
1834 : *
1835 : * @macsec_ops: MACsec offloading ops
1836 : *
1837 : * @udp_tunnel_nic_info: static structure describing the UDP tunnel
1838 : * offload capabilities of the device
1839 : * @udp_tunnel_nic: UDP tunnel offload state
1840 : * @xdp_state: stores info on attached XDP BPF programs
1841 : *
1842 : * @nested_level: Used as as a parameter of spin_lock_nested() of
1843 : * dev->addr_list_lock.
1844 : * @unlink_list: As netif_addr_lock() can be called recursively,
1845 : * keep a list of interfaces to be deleted.
1846 : *
1847 : * FIXME: cleanup struct net_device such that network protocol info
1848 : * moves out.
1849 : */
1850 :
1851 : struct net_device {
1852 : char name[IFNAMSIZ];
1853 : struct netdev_name_node *name_node;
1854 : struct dev_ifalias __rcu *ifalias;
1855 : /*
1856 : * I/O specific fields
1857 : * FIXME: Merge these and struct ifmap into one
1858 : */
1859 : unsigned long mem_end;
1860 : unsigned long mem_start;
1861 : unsigned long base_addr;
1862 :
1863 : /*
1864 : * Some hardware also needs these fields (state,dev_list,
1865 : * napi_list,unreg_list,close_list) but they are not
1866 : * part of the usual set specified in Space.c.
1867 : */
1868 :
1869 : unsigned long state;
1870 :
1871 : struct list_head dev_list;
1872 : struct list_head napi_list;
1873 : struct list_head unreg_list;
1874 : struct list_head close_list;
1875 : struct list_head ptype_all;
1876 : struct list_head ptype_specific;
1877 :
1878 : struct {
1879 : struct list_head upper;
1880 : struct list_head lower;
1881 : } adj_list;
1882 :
1883 : /* Read-mostly cache-line for fast-path access */
1884 : unsigned int flags;
1885 : unsigned int priv_flags;
1886 : const struct net_device_ops *netdev_ops;
1887 : int ifindex;
1888 : unsigned short gflags;
1889 : unsigned short hard_header_len;
1890 :
1891 : /* Note : dev->mtu is often read without holding a lock.
1892 : * Writers usually hold RTNL.
1893 : * It is recommended to use READ_ONCE() to annotate the reads,
1894 : * and to use WRITE_ONCE() to annotate the writes.
1895 : */
1896 : unsigned int mtu;
1897 : unsigned short needed_headroom;
1898 : unsigned short needed_tailroom;
1899 :
1900 : netdev_features_t features;
1901 : netdev_features_t hw_features;
1902 : netdev_features_t wanted_features;
1903 : netdev_features_t vlan_features;
1904 : netdev_features_t hw_enc_features;
1905 : netdev_features_t mpls_features;
1906 : netdev_features_t gso_partial_features;
1907 :
1908 : unsigned int min_mtu;
1909 : unsigned int max_mtu;
1910 : unsigned short type;
1911 : unsigned char min_header_len;
1912 : unsigned char name_assign_type;
1913 :
1914 : int group;
1915 :
1916 : struct net_device_stats stats; /* not used by modern drivers */
1917 :
1918 : atomic_long_t rx_dropped;
1919 : atomic_long_t tx_dropped;
1920 : atomic_long_t rx_nohandler;
1921 :
1922 : /* Stats to monitor link on/off, flapping */
1923 : atomic_t carrier_up_count;
1924 : atomic_t carrier_down_count;
1925 :
1926 : #ifdef CONFIG_WIRELESS_EXT
1927 : const struct iw_handler_def *wireless_handlers;
1928 : struct iw_public_data *wireless_data;
1929 : #endif
1930 : const struct ethtool_ops *ethtool_ops;
1931 : #ifdef CONFIG_NET_L3_MASTER_DEV
1932 : const struct l3mdev_ops *l3mdev_ops;
1933 : #endif
1934 : #if IS_ENABLED(CONFIG_IPV6)
1935 : const struct ndisc_ops *ndisc_ops;
1936 : #endif
1937 :
1938 : #ifdef CONFIG_XFRM_OFFLOAD
1939 : const struct xfrmdev_ops *xfrmdev_ops;
1940 : #endif
1941 :
1942 : #if IS_ENABLED(CONFIG_TLS_DEVICE)
1943 : const struct tlsdev_ops *tlsdev_ops;
1944 : #endif
1945 :
1946 : const struct header_ops *header_ops;
1947 :
1948 : unsigned char operstate;
1949 : unsigned char link_mode;
1950 :
1951 : unsigned char if_port;
1952 : unsigned char dma;
1953 :
1954 : /* Interface address info. */
1955 : unsigned char perm_addr[MAX_ADDR_LEN];
1956 : unsigned char addr_assign_type;
1957 : unsigned char addr_len;
1958 : unsigned char upper_level;
1959 : unsigned char lower_level;
1960 :
1961 : unsigned short neigh_priv_len;
1962 : unsigned short dev_id;
1963 : unsigned short dev_port;
1964 : unsigned short padded;
1965 :
1966 : spinlock_t addr_list_lock;
1967 : int irq;
1968 :
1969 : struct netdev_hw_addr_list uc;
1970 : struct netdev_hw_addr_list mc;
1971 : struct netdev_hw_addr_list dev_addrs;
1972 :
1973 : #ifdef CONFIG_SYSFS
1974 : struct kset *queues_kset;
1975 : #endif
1976 : #ifdef CONFIG_LOCKDEP
1977 : struct list_head unlink_list;
1978 : #endif
1979 : unsigned int promiscuity;
1980 : unsigned int allmulti;
1981 : bool uc_promisc;
1982 : #ifdef CONFIG_LOCKDEP
1983 : unsigned char nested_level;
1984 : #endif
1985 :
1986 :
1987 : /* Protocol-specific pointers */
1988 :
1989 : #if IS_ENABLED(CONFIG_VLAN_8021Q)
1990 : struct vlan_info __rcu *vlan_info;
1991 : #endif
1992 : #if IS_ENABLED(CONFIG_NET_DSA)
1993 : struct dsa_port *dsa_ptr;
1994 : #endif
1995 : #if IS_ENABLED(CONFIG_TIPC)
1996 : struct tipc_bearer __rcu *tipc_ptr;
1997 : #endif
1998 : #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1999 : void *atalk_ptr;
2000 : #endif
2001 : struct in_device __rcu *ip_ptr;
2002 : #if IS_ENABLED(CONFIG_DECNET)
2003 : struct dn_dev __rcu *dn_ptr;
2004 : #endif
2005 : struct inet6_dev __rcu *ip6_ptr;
2006 : #if IS_ENABLED(CONFIG_AX25)
2007 : void *ax25_ptr;
2008 : #endif
2009 : struct wireless_dev *ieee80211_ptr;
2010 : struct wpan_dev *ieee802154_ptr;
2011 : #if IS_ENABLED(CONFIG_MPLS_ROUTING)
2012 : struct mpls_dev __rcu *mpls_ptr;
2013 : #endif
2014 :
2015 : /*
2016 : * Cache lines mostly used on receive path (including eth_type_trans())
2017 : */
2018 : /* Interface address info used in eth_type_trans() */
2019 : unsigned char *dev_addr;
2020 :
2021 : struct netdev_rx_queue *_rx;
2022 : unsigned int num_rx_queues;
2023 : unsigned int real_num_rx_queues;
2024 :
2025 : struct bpf_prog __rcu *xdp_prog;
2026 : unsigned long gro_flush_timeout;
2027 : int napi_defer_hard_irqs;
2028 : rx_handler_func_t __rcu *rx_handler;
2029 : void __rcu *rx_handler_data;
2030 :
2031 : #ifdef CONFIG_NET_CLS_ACT
2032 : struct mini_Qdisc __rcu *miniq_ingress;
2033 : #endif
2034 : struct netdev_queue __rcu *ingress_queue;
2035 : #ifdef CONFIG_NETFILTER_INGRESS
2036 : struct nf_hook_entries __rcu *nf_hooks_ingress;
2037 : #endif
2038 :
2039 : unsigned char broadcast[MAX_ADDR_LEN];
2040 : #ifdef CONFIG_RFS_ACCEL
2041 : struct cpu_rmap *rx_cpu_rmap;
2042 : #endif
2043 : struct hlist_node index_hlist;
2044 :
2045 : /*
2046 : * Cache lines mostly used on transmit path
2047 : */
2048 : struct netdev_queue *_tx ____cacheline_aligned_in_smp;
2049 : unsigned int num_tx_queues;
2050 : unsigned int real_num_tx_queues;
2051 : struct Qdisc *qdisc;
2052 : unsigned int tx_queue_len;
2053 : spinlock_t tx_global_lock;
2054 :
2055 : struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2056 :
2057 : #ifdef CONFIG_XPS
2058 : struct xps_dev_maps __rcu *xps_cpus_map;
2059 : struct xps_dev_maps __rcu *xps_rxqs_map;
2060 : #endif
2061 : #ifdef CONFIG_NET_CLS_ACT
2062 : struct mini_Qdisc __rcu *miniq_egress;
2063 : #endif
2064 :
2065 : #ifdef CONFIG_NET_SCHED
2066 : DECLARE_HASHTABLE (qdisc_hash, 4);
2067 : #endif
2068 : /* These may be needed for future network-power-down code. */
2069 : struct timer_list watchdog_timer;
2070 : int watchdog_timeo;
2071 :
2072 : u32 proto_down_reason;
2073 :
2074 : struct list_head todo_list;
2075 : int __percpu *pcpu_refcnt;
2076 :
2077 : struct list_head link_watch_list;
2078 :
2079 : enum { NETREG_UNINITIALIZED=0,
2080 : NETREG_REGISTERED, /* completed register_netdevice */
2081 : NETREG_UNREGISTERING, /* called unregister_netdevice */
2082 : NETREG_UNREGISTERED, /* completed unregister todo */
2083 : NETREG_RELEASED, /* called free_netdev */
2084 : NETREG_DUMMY, /* dummy device for NAPI poll */
2085 : } reg_state:8;
2086 :
2087 : bool dismantle;
2088 :
2089 : enum {
2090 : RTNL_LINK_INITIALIZED,
2091 : RTNL_LINK_INITIALIZING,
2092 : } rtnl_link_state:16;
2093 :
2094 : bool needs_free_netdev;
2095 : void (*priv_destructor)(struct net_device *dev);
2096 :
2097 : #ifdef CONFIG_NETPOLL
2098 : struct netpoll_info __rcu *npinfo;
2099 : #endif
2100 :
2101 : possible_net_t nd_net;
2102 :
2103 : /* mid-layer private */
2104 : void *ml_priv;
2105 : enum netdev_ml_priv_type ml_priv_type;
2106 :
2107 : union {
2108 : struct pcpu_lstats __percpu *lstats;
2109 : struct pcpu_sw_netstats __percpu *tstats;
2110 : struct pcpu_dstats __percpu *dstats;
2111 : };
2112 :
2113 : #if IS_ENABLED(CONFIG_GARP)
2114 : struct garp_port __rcu *garp_port;
2115 : #endif
2116 : #if IS_ENABLED(CONFIG_MRP)
2117 : struct mrp_port __rcu *mrp_port;
2118 : #endif
2119 :
2120 : struct device dev;
2121 : const struct attribute_group *sysfs_groups[4];
2122 : const struct attribute_group *sysfs_rx_queue_group;
2123 :
2124 : const struct rtnl_link_ops *rtnl_link_ops;
2125 :
2126 : /* for setting kernel sock attribute on TCP connection setup */
2127 : #define GSO_MAX_SIZE 65536
2128 : unsigned int gso_max_size;
2129 : #define GSO_MAX_SEGS 65535
2130 : u16 gso_max_segs;
2131 :
2132 : #ifdef CONFIG_DCB
2133 : const struct dcbnl_rtnl_ops *dcbnl_ops;
2134 : #endif
2135 : s16 num_tc;
2136 : struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2137 : u8 prio_tc_map[TC_BITMASK + 1];
2138 :
2139 : #if IS_ENABLED(CONFIG_FCOE)
2140 : unsigned int fcoe_ddp_xid;
2141 : #endif
2142 : #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2143 : struct netprio_map __rcu *priomap;
2144 : #endif
2145 : struct phy_device *phydev;
2146 : struct sfp_bus *sfp_bus;
2147 : struct lock_class_key *qdisc_tx_busylock;
2148 : struct lock_class_key *qdisc_running_key;
2149 : bool proto_down;
2150 : unsigned wol_enabled:1;
2151 : unsigned threaded:1;
2152 :
2153 : struct list_head net_notifier_list;
2154 :
2155 : #if IS_ENABLED(CONFIG_MACSEC)
2156 : /* MACsec management functions */
2157 : const struct macsec_ops *macsec_ops;
2158 : #endif
2159 : const struct udp_tunnel_nic_info *udp_tunnel_nic_info;
2160 : struct udp_tunnel_nic *udp_tunnel_nic;
2161 :
2162 : /* protected by rtnl_lock */
2163 : struct bpf_xdp_entity xdp_state[__MAX_XDP_MODE];
2164 : };
2165 : #define to_net_dev(d) container_of(d, struct net_device, dev)
2166 :
2167 723 : static inline bool netif_elide_gro(const struct net_device *dev)
2168 : {
2169 723 : if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2170 0 : return true;
2171 : return false;
2172 : }
2173 :
2174 : #define NETDEV_ALIGN 32
2175 :
2176 : static inline
2177 0 : int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2178 : {
2179 0 : return dev->prio_tc_map[prio & TC_BITMASK];
2180 : }
2181 :
2182 : static inline
2183 0 : int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2184 : {
2185 0 : if (tc >= dev->num_tc)
2186 : return -EINVAL;
2187 :
2188 0 : dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2189 0 : return 0;
2190 : }
2191 :
2192 : int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2193 : void netdev_reset_tc(struct net_device *dev);
2194 : int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2195 : int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2196 :
2197 : static inline
2198 : int netdev_get_num_tc(struct net_device *dev)
2199 : {
2200 : return dev->num_tc;
2201 : }
2202 :
2203 : static inline void net_prefetch(void *p)
2204 : {
2205 : prefetch(p);
2206 : #if L1_CACHE_BYTES < 128
2207 : prefetch((u8 *)p + L1_CACHE_BYTES);
2208 : #endif
2209 : }
2210 :
2211 : static inline void net_prefetchw(void *p)
2212 : {
2213 : prefetchw(p);
2214 : #if L1_CACHE_BYTES < 128
2215 : prefetchw((u8 *)p + L1_CACHE_BYTES);
2216 : #endif
2217 : }
2218 :
2219 : void netdev_unbind_sb_channel(struct net_device *dev,
2220 : struct net_device *sb_dev);
2221 : int netdev_bind_sb_channel_queue(struct net_device *dev,
2222 : struct net_device *sb_dev,
2223 : u8 tc, u16 count, u16 offset);
2224 : int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2225 : static inline int netdev_get_sb_channel(struct net_device *dev)
2226 : {
2227 : return max_t(int, -dev->num_tc, 0);
2228 : }
2229 :
2230 : static inline
2231 2207 : struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2232 : unsigned int index)
2233 : {
2234 1755 : return &dev->_tx[index];
2235 : }
2236 :
2237 448 : static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2238 : const struct sk_buff *skb)
2239 : {
2240 448 : return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2241 : }
2242 :
2243 12 : static inline void netdev_for_each_tx_queue(struct net_device *dev,
2244 : void (*f)(struct net_device *,
2245 : struct netdev_queue *,
2246 : void *),
2247 : void *arg)
2248 : {
2249 12 : unsigned int i;
2250 :
2251 24 : for (i = 0; i < dev->num_tx_queues; i++)
2252 12 : f(dev, &dev->_tx[i], arg);
2253 12 : }
2254 :
2255 : #define netdev_lockdep_set_classes(dev) \
2256 : { \
2257 : static struct lock_class_key qdisc_tx_busylock_key; \
2258 : static struct lock_class_key qdisc_running_key; \
2259 : static struct lock_class_key qdisc_xmit_lock_key; \
2260 : static struct lock_class_key dev_addr_list_lock_key; \
2261 : unsigned int i; \
2262 : \
2263 : (dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
2264 : (dev)->qdisc_running_key = &qdisc_running_key; \
2265 : lockdep_set_class(&(dev)->addr_list_lock, \
2266 : &dev_addr_list_lock_key); \
2267 : for (i = 0; i < (dev)->num_tx_queues; i++) \
2268 : lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
2269 : &qdisc_xmit_lock_key); \
2270 : }
2271 :
2272 : u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2273 : struct net_device *sb_dev);
2274 : struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2275 : struct sk_buff *skb,
2276 : struct net_device *sb_dev);
2277 :
2278 : /* returns the headroom that the master device needs to take in account
2279 : * when forwarding to this dev
2280 : */
2281 : static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2282 : {
2283 : return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2284 : }
2285 :
2286 : static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2287 : {
2288 : if (dev->netdev_ops->ndo_set_rx_headroom)
2289 : dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2290 : }
2291 :
2292 : /* set the device rx headroom to the dev's default */
2293 : static inline void netdev_reset_rx_headroom(struct net_device *dev)
2294 : {
2295 : netdev_set_rx_headroom(dev, -1);
2296 : }
2297 :
2298 : static inline void *netdev_get_ml_priv(struct net_device *dev,
2299 : enum netdev_ml_priv_type type)
2300 : {
2301 : if (dev->ml_priv_type != type)
2302 : return NULL;
2303 :
2304 : return dev->ml_priv;
2305 : }
2306 :
2307 : static inline void netdev_set_ml_priv(struct net_device *dev,
2308 : void *ml_priv,
2309 : enum netdev_ml_priv_type type)
2310 : {
2311 : WARN(dev->ml_priv_type && dev->ml_priv_type != type,
2312 : "Overwriting already set ml_priv_type (%u) with different ml_priv_type (%u)!\n",
2313 : dev->ml_priv_type, type);
2314 : WARN(!dev->ml_priv_type && dev->ml_priv,
2315 : "Overwriting already set ml_priv and ml_priv_type is ML_PRIV_NONE!\n");
2316 :
2317 : dev->ml_priv = ml_priv;
2318 : dev->ml_priv_type = type;
2319 : }
2320 :
2321 : /*
2322 : * Net namespace inlines
2323 : */
2324 : static inline
2325 5479 : struct net *dev_net(const struct net_device *dev)
2326 : {
2327 5450 : return read_pnet(&dev->nd_net);
2328 : }
2329 :
2330 : static inline
2331 5 : void dev_net_set(struct net_device *dev, struct net *net)
2332 : {
2333 5 : write_pnet(&dev->nd_net, net);
2334 : }
2335 :
2336 : /**
2337 : * netdev_priv - access network device private data
2338 : * @dev: network device
2339 : *
2340 : * Get network device private data
2341 : */
2342 474 : static inline void *netdev_priv(const struct net_device *dev)
2343 : {
2344 474 : return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2345 : }
2346 :
2347 : /* Set the sysfs physical device reference for the network logical device
2348 : * if set prior to registration will cause a symlink during initialization.
2349 : */
2350 : #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2351 :
2352 : /* Set the sysfs device type for the network logical device to allow
2353 : * fine-grained identification of different network device types. For
2354 : * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2355 : */
2356 : #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2357 :
2358 : /* Default NAPI poll() weight
2359 : * Device drivers are strongly advised to not use bigger value
2360 : */
2361 : #define NAPI_POLL_WEIGHT 64
2362 :
2363 : /**
2364 : * netif_napi_add - initialize a NAPI context
2365 : * @dev: network device
2366 : * @napi: NAPI context
2367 : * @poll: polling function
2368 : * @weight: default weight
2369 : *
2370 : * netif_napi_add() must be used to initialize a NAPI context prior to calling
2371 : * *any* of the other NAPI-related functions.
2372 : */
2373 : void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2374 : int (*poll)(struct napi_struct *, int), int weight);
2375 :
2376 : /**
2377 : * netif_tx_napi_add - initialize a NAPI context
2378 : * @dev: network device
2379 : * @napi: NAPI context
2380 : * @poll: polling function
2381 : * @weight: default weight
2382 : *
2383 : * This variant of netif_napi_add() should be used from drivers using NAPI
2384 : * to exclusively poll a TX queue.
2385 : * This will avoid we add it into napi_hash[], thus polluting this hash table.
2386 : */
2387 1 : static inline void netif_tx_napi_add(struct net_device *dev,
2388 : struct napi_struct *napi,
2389 : int (*poll)(struct napi_struct *, int),
2390 : int weight)
2391 : {
2392 1 : set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2393 1 : netif_napi_add(dev, napi, poll, weight);
2394 1 : }
2395 :
2396 : /**
2397 : * __netif_napi_del - remove a NAPI context
2398 : * @napi: NAPI context
2399 : *
2400 : * Warning: caller must observe RCU grace period before freeing memory
2401 : * containing @napi. Drivers might want to call this helper to combine
2402 : * all the needed RCU grace periods into a single one.
2403 : */
2404 : void __netif_napi_del(struct napi_struct *napi);
2405 :
2406 : /**
2407 : * netif_napi_del - remove a NAPI context
2408 : * @napi: NAPI context
2409 : *
2410 : * netif_napi_del() removes a NAPI context from the network device NAPI list
2411 : */
2412 0 : static inline void netif_napi_del(struct napi_struct *napi)
2413 : {
2414 0 : __netif_napi_del(napi);
2415 0 : synchronize_net();
2416 : }
2417 :
2418 : struct napi_gro_cb {
2419 : /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2420 : void *frag0;
2421 :
2422 : /* Length of frag0. */
2423 : unsigned int frag0_len;
2424 :
2425 : /* This indicates where we are processing relative to skb->data. */
2426 : int data_offset;
2427 :
2428 : /* This is non-zero if the packet cannot be merged with the new skb. */
2429 : u16 flush;
2430 :
2431 : /* Save the IP ID here and check when we get to the transport layer */
2432 : u16 flush_id;
2433 :
2434 : /* Number of segments aggregated. */
2435 : u16 count;
2436 :
2437 : /* Start offset for remote checksum offload */
2438 : u16 gro_remcsum_start;
2439 :
2440 : /* jiffies when first packet was created/queued */
2441 : unsigned long age;
2442 :
2443 : /* Used in ipv6_gro_receive() and foo-over-udp */
2444 : u16 proto;
2445 :
2446 : /* This is non-zero if the packet may be of the same flow. */
2447 : u8 same_flow:1;
2448 :
2449 : /* Used in tunnel GRO receive */
2450 : u8 encap_mark:1;
2451 :
2452 : /* GRO checksum is valid */
2453 : u8 csum_valid:1;
2454 :
2455 : /* Number of checksums via CHECKSUM_UNNECESSARY */
2456 : u8 csum_cnt:3;
2457 :
2458 : /* Free the skb? */
2459 : u8 free:2;
2460 : #define NAPI_GRO_FREE 1
2461 : #define NAPI_GRO_FREE_STOLEN_HEAD 2
2462 :
2463 : /* Used in foo-over-udp, set in udp[46]_gro_receive */
2464 : u8 is_ipv6:1;
2465 :
2466 : /* Used in GRE, set in fou/gue_gro_receive */
2467 : u8 is_fou:1;
2468 :
2469 : /* Used to determine if flush_id can be ignored */
2470 : u8 is_atomic:1;
2471 :
2472 : /* Number of gro_receive callbacks this packet already went through */
2473 : u8 recursion_counter:4;
2474 :
2475 : /* GRO is done by frag_list pointer chaining. */
2476 : u8 is_flist:1;
2477 :
2478 : /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2479 : __wsum csum;
2480 :
2481 : /* used in skb_gro_receive() slow path */
2482 : struct sk_buff *last;
2483 : };
2484 :
2485 : #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2486 :
2487 : #define GRO_RECURSION_LIMIT 15
2488 707 : static inline int gro_recursion_inc_test(struct sk_buff *skb)
2489 : {
2490 707 : return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2491 : }
2492 :
2493 : typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2494 0 : static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2495 : struct list_head *head,
2496 : struct sk_buff *skb)
2497 : {
2498 0 : if (unlikely(gro_recursion_inc_test(skb))) {
2499 0 : NAPI_GRO_CB(skb)->flush |= 1;
2500 0 : return NULL;
2501 : }
2502 :
2503 0 : return cb(head, skb);
2504 : }
2505 :
2506 : typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2507 : struct sk_buff *);
2508 0 : static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2509 : struct sock *sk,
2510 : struct list_head *head,
2511 : struct sk_buff *skb)
2512 : {
2513 0 : if (unlikely(gro_recursion_inc_test(skb))) {
2514 0 : NAPI_GRO_CB(skb)->flush |= 1;
2515 0 : return NULL;
2516 : }
2517 :
2518 0 : return cb(sk, head, skb);
2519 : }
2520 :
2521 : struct packet_type {
2522 : __be16 type; /* This is really htons(ether_type). */
2523 : bool ignore_outgoing;
2524 : struct net_device *dev; /* NULL is wildcarded here */
2525 : int (*func) (struct sk_buff *,
2526 : struct net_device *,
2527 : struct packet_type *,
2528 : struct net_device *);
2529 : void (*list_func) (struct list_head *,
2530 : struct packet_type *,
2531 : struct net_device *);
2532 : bool (*id_match)(struct packet_type *ptype,
2533 : struct sock *sk);
2534 : void *af_packet_priv;
2535 : struct list_head list;
2536 : };
2537 :
2538 : struct offload_callbacks {
2539 : struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2540 : netdev_features_t features);
2541 : struct sk_buff *(*gro_receive)(struct list_head *head,
2542 : struct sk_buff *skb);
2543 : int (*gro_complete)(struct sk_buff *skb, int nhoff);
2544 : };
2545 :
2546 : struct packet_offload {
2547 : __be16 type; /* This is really htons(ether_type). */
2548 : u16 priority;
2549 : struct offload_callbacks callbacks;
2550 : struct list_head list;
2551 : };
2552 :
2553 : /* often modified stats are per-CPU, other are shared (netdev->stats) */
2554 : struct pcpu_sw_netstats {
2555 : u64 rx_packets;
2556 : u64 rx_bytes;
2557 : u64 tx_packets;
2558 : u64 tx_bytes;
2559 : struct u64_stats_sync syncp;
2560 : } __aligned(4 * sizeof(u64));
2561 :
2562 : struct pcpu_lstats {
2563 : u64_stats_t packets;
2564 : u64_stats_t bytes;
2565 : struct u64_stats_sync syncp;
2566 : } __aligned(2 * sizeof(u64));
2567 :
2568 : void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2569 :
2570 : static inline void dev_sw_netstats_rx_add(struct net_device *dev, unsigned int len)
2571 : {
2572 : struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2573 :
2574 : u64_stats_update_begin(&tstats->syncp);
2575 : tstats->rx_bytes += len;
2576 : tstats->rx_packets++;
2577 : u64_stats_update_end(&tstats->syncp);
2578 : }
2579 :
2580 : static inline void dev_sw_netstats_tx_add(struct net_device *dev,
2581 : unsigned int packets,
2582 : unsigned int len)
2583 : {
2584 : struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
2585 :
2586 : u64_stats_update_begin(&tstats->syncp);
2587 : tstats->tx_bytes += len;
2588 : tstats->tx_packets += packets;
2589 : u64_stats_update_end(&tstats->syncp);
2590 : }
2591 :
2592 0 : static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2593 : {
2594 0 : struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2595 :
2596 0 : u64_stats_update_begin(&lstats->syncp);
2597 0 : u64_stats_add(&lstats->bytes, len);
2598 0 : u64_stats_inc(&lstats->packets);
2599 0 : u64_stats_update_end(&lstats->syncp);
2600 0 : }
2601 :
2602 : #define __netdev_alloc_pcpu_stats(type, gfp) \
2603 : ({ \
2604 : typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2605 : if (pcpu_stats) { \
2606 : int __cpu; \
2607 : for_each_possible_cpu(__cpu) { \
2608 : typeof(type) *stat; \
2609 : stat = per_cpu_ptr(pcpu_stats, __cpu); \
2610 : u64_stats_init(&stat->syncp); \
2611 : } \
2612 : } \
2613 : pcpu_stats; \
2614 : })
2615 :
2616 : #define netdev_alloc_pcpu_stats(type) \
2617 : __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2618 :
2619 : #define devm_netdev_alloc_pcpu_stats(dev, type) \
2620 : ({ \
2621 : typeof(type) __percpu *pcpu_stats = devm_alloc_percpu(dev, type);\
2622 : if (pcpu_stats) { \
2623 : int __cpu; \
2624 : for_each_possible_cpu(__cpu) { \
2625 : typeof(type) *stat; \
2626 : stat = per_cpu_ptr(pcpu_stats, __cpu); \
2627 : u64_stats_init(&stat->syncp); \
2628 : } \
2629 : } \
2630 : pcpu_stats; \
2631 : })
2632 :
2633 : enum netdev_lag_tx_type {
2634 : NETDEV_LAG_TX_TYPE_UNKNOWN,
2635 : NETDEV_LAG_TX_TYPE_RANDOM,
2636 : NETDEV_LAG_TX_TYPE_BROADCAST,
2637 : NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2638 : NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2639 : NETDEV_LAG_TX_TYPE_HASH,
2640 : };
2641 :
2642 : enum netdev_lag_hash {
2643 : NETDEV_LAG_HASH_NONE,
2644 : NETDEV_LAG_HASH_L2,
2645 : NETDEV_LAG_HASH_L34,
2646 : NETDEV_LAG_HASH_L23,
2647 : NETDEV_LAG_HASH_E23,
2648 : NETDEV_LAG_HASH_E34,
2649 : NETDEV_LAG_HASH_VLAN_SRCMAC,
2650 : NETDEV_LAG_HASH_UNKNOWN,
2651 : };
2652 :
2653 : struct netdev_lag_upper_info {
2654 : enum netdev_lag_tx_type tx_type;
2655 : enum netdev_lag_hash hash_type;
2656 : };
2657 :
2658 : struct netdev_lag_lower_state_info {
2659 : u8 link_up : 1,
2660 : tx_enabled : 1;
2661 : };
2662 :
2663 : #include <linux/notifier.h>
2664 :
2665 : /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2666 : * and the rtnetlink notification exclusion list in rtnetlink_event() when
2667 : * adding new types.
2668 : */
2669 : enum netdev_cmd {
2670 : NETDEV_UP = 1, /* For now you can't veto a device up/down */
2671 : NETDEV_DOWN,
2672 : NETDEV_REBOOT, /* Tell a protocol stack a network interface
2673 : detected a hardware crash and restarted
2674 : - we can use this eg to kick tcp sessions
2675 : once done */
2676 : NETDEV_CHANGE, /* Notify device state change */
2677 : NETDEV_REGISTER,
2678 : NETDEV_UNREGISTER,
2679 : NETDEV_CHANGEMTU, /* notify after mtu change happened */
2680 : NETDEV_CHANGEADDR, /* notify after the address change */
2681 : NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2682 : NETDEV_GOING_DOWN,
2683 : NETDEV_CHANGENAME,
2684 : NETDEV_FEAT_CHANGE,
2685 : NETDEV_BONDING_FAILOVER,
2686 : NETDEV_PRE_UP,
2687 : NETDEV_PRE_TYPE_CHANGE,
2688 : NETDEV_POST_TYPE_CHANGE,
2689 : NETDEV_POST_INIT,
2690 : NETDEV_RELEASE,
2691 : NETDEV_NOTIFY_PEERS,
2692 : NETDEV_JOIN,
2693 : NETDEV_CHANGEUPPER,
2694 : NETDEV_RESEND_IGMP,
2695 : NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2696 : NETDEV_CHANGEINFODATA,
2697 : NETDEV_BONDING_INFO,
2698 : NETDEV_PRECHANGEUPPER,
2699 : NETDEV_CHANGELOWERSTATE,
2700 : NETDEV_UDP_TUNNEL_PUSH_INFO,
2701 : NETDEV_UDP_TUNNEL_DROP_INFO,
2702 : NETDEV_CHANGE_TX_QUEUE_LEN,
2703 : NETDEV_CVLAN_FILTER_PUSH_INFO,
2704 : NETDEV_CVLAN_FILTER_DROP_INFO,
2705 : NETDEV_SVLAN_FILTER_PUSH_INFO,
2706 : NETDEV_SVLAN_FILTER_DROP_INFO,
2707 : };
2708 : const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2709 :
2710 : int register_netdevice_notifier(struct notifier_block *nb);
2711 : int unregister_netdevice_notifier(struct notifier_block *nb);
2712 : int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2713 : int unregister_netdevice_notifier_net(struct net *net,
2714 : struct notifier_block *nb);
2715 : int register_netdevice_notifier_dev_net(struct net_device *dev,
2716 : struct notifier_block *nb,
2717 : struct netdev_net_notifier *nn);
2718 : int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2719 : struct notifier_block *nb,
2720 : struct netdev_net_notifier *nn);
2721 :
2722 : struct netdev_notifier_info {
2723 : struct net_device *dev;
2724 : struct netlink_ext_ack *extack;
2725 : };
2726 :
2727 : struct netdev_notifier_info_ext {
2728 : struct netdev_notifier_info info; /* must be first */
2729 : union {
2730 : u32 mtu;
2731 : } ext;
2732 : };
2733 :
2734 : struct netdev_notifier_change_info {
2735 : struct netdev_notifier_info info; /* must be first */
2736 : unsigned int flags_changed;
2737 : };
2738 :
2739 : struct netdev_notifier_changeupper_info {
2740 : struct netdev_notifier_info info; /* must be first */
2741 : struct net_device *upper_dev; /* new upper dev */
2742 : bool master; /* is upper dev master */
2743 : bool linking; /* is the notification for link or unlink */
2744 : void *upper_info; /* upper dev info */
2745 : };
2746 :
2747 : struct netdev_notifier_changelowerstate_info {
2748 : struct netdev_notifier_info info; /* must be first */
2749 : void *lower_state_info; /* is lower dev state */
2750 : };
2751 :
2752 : struct netdev_notifier_pre_changeaddr_info {
2753 : struct netdev_notifier_info info; /* must be first */
2754 : const unsigned char *dev_addr;
2755 : };
2756 :
2757 : static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2758 : struct net_device *dev)
2759 : {
2760 : info->dev = dev;
2761 : info->extack = NULL;
2762 : }
2763 :
2764 : static inline struct net_device *
2765 48 : netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2766 : {
2767 48 : return info->dev;
2768 : }
2769 :
2770 : static inline struct netlink_ext_ack *
2771 : netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2772 : {
2773 : return info->extack;
2774 : }
2775 :
2776 : int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2777 :
2778 :
2779 : extern rwlock_t dev_base_lock; /* Device list lock */
2780 :
2781 : #define for_each_netdev(net, d) \
2782 : list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2783 : #define for_each_netdev_reverse(net, d) \
2784 : list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2785 : #define for_each_netdev_rcu(net, d) \
2786 : list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2787 : #define for_each_netdev_safe(net, d, n) \
2788 : list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2789 : #define for_each_netdev_continue(net, d) \
2790 : list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2791 : #define for_each_netdev_continue_reverse(net, d) \
2792 : list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2793 : dev_list)
2794 : #define for_each_netdev_continue_rcu(net, d) \
2795 : list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2796 : #define for_each_netdev_in_bond_rcu(bond, slave) \
2797 : for_each_netdev_rcu(&init_net, slave) \
2798 : if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2799 : #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2800 :
2801 : static inline struct net_device *next_net_device(struct net_device *dev)
2802 : {
2803 : struct list_head *lh;
2804 : struct net *net;
2805 :
2806 : net = dev_net(dev);
2807 : lh = dev->dev_list.next;
2808 : return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2809 : }
2810 :
2811 0 : static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2812 : {
2813 0 : struct list_head *lh;
2814 0 : struct net *net;
2815 :
2816 0 : net = dev_net(dev);
2817 0 : lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2818 0 : return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2819 : }
2820 :
2821 : static inline struct net_device *first_net_device(struct net *net)
2822 : {
2823 : return list_empty(&net->dev_base_head) ? NULL :
2824 : net_device_entry(net->dev_base_head.next);
2825 : }
2826 :
2827 : static inline struct net_device *first_net_device_rcu(struct net *net)
2828 : {
2829 : struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2830 :
2831 : return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2832 : }
2833 :
2834 : int netdev_boot_setup_check(struct net_device *dev);
2835 : unsigned long netdev_boot_base(const char *prefix, int unit);
2836 : struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2837 : const char *hwaddr);
2838 : struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2839 : void dev_add_pack(struct packet_type *pt);
2840 : void dev_remove_pack(struct packet_type *pt);
2841 : void __dev_remove_pack(struct packet_type *pt);
2842 : void dev_add_offload(struct packet_offload *po);
2843 : void dev_remove_offload(struct packet_offload *po);
2844 :
2845 : int dev_get_iflink(const struct net_device *dev);
2846 : int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2847 : struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2848 : unsigned short mask);
2849 : struct net_device *dev_get_by_name(struct net *net, const char *name);
2850 : struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2851 : struct net_device *__dev_get_by_name(struct net *net, const char *name);
2852 : int dev_alloc_name(struct net_device *dev, const char *name);
2853 : int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2854 : void dev_close(struct net_device *dev);
2855 : void dev_close_many(struct list_head *head, bool unlink);
2856 : void dev_disable_lro(struct net_device *dev);
2857 : int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2858 : u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2859 : struct net_device *sb_dev);
2860 : u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2861 : struct net_device *sb_dev);
2862 :
2863 : int dev_queue_xmit(struct sk_buff *skb);
2864 : int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2865 : int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2866 :
2867 0 : static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
2868 : {
2869 0 : int ret;
2870 :
2871 0 : ret = __dev_direct_xmit(skb, queue_id);
2872 0 : if (!dev_xmit_complete(ret))
2873 0 : kfree_skb(skb);
2874 0 : return ret;
2875 : }
2876 :
2877 : int register_netdevice(struct net_device *dev);
2878 : void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2879 : void unregister_netdevice_many(struct list_head *head);
2880 0 : static inline void unregister_netdevice(struct net_device *dev)
2881 : {
2882 0 : unregister_netdevice_queue(dev, NULL);
2883 0 : }
2884 :
2885 : int netdev_refcnt_read(const struct net_device *dev);
2886 : void free_netdev(struct net_device *dev);
2887 : void netdev_freemem(struct net_device *dev);
2888 : int init_dummy_netdev(struct net_device *dev);
2889 :
2890 : struct net_device *netdev_get_xmit_slave(struct net_device *dev,
2891 : struct sk_buff *skb,
2892 : bool all_slaves);
2893 : struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev,
2894 : struct sock *sk);
2895 : struct net_device *dev_get_by_index(struct net *net, int ifindex);
2896 : struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2897 : struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2898 : struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2899 : int netdev_get_name(struct net *net, char *name, int ifindex);
2900 : int dev_restart(struct net_device *dev);
2901 : int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2902 : int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
2903 :
2904 4994 : static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2905 : {
2906 3580 : return NAPI_GRO_CB(skb)->data_offset;
2907 : }
2908 :
2909 3378 : static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2910 : {
2911 2671 : return skb->len - NAPI_GRO_CB(skb)->data_offset;
2912 : }
2913 :
2914 1412 : static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2915 : {
2916 1412 : NAPI_GRO_CB(skb)->data_offset += len;
2917 : }
2918 :
2919 1428 : static inline void *skb_gro_header_fast(struct sk_buff *skb,
2920 : unsigned int offset)
2921 : {
2922 1428 : return NAPI_GRO_CB(skb)->frag0 + offset;
2923 : }
2924 :
2925 2133 : static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2926 : {
2927 2133 : return NAPI_GRO_CB(skb)->frag0_len < hlen;
2928 : }
2929 :
2930 2133 : static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2931 : {
2932 2133 : NAPI_GRO_CB(skb)->frag0 = NULL;
2933 2133 : NAPI_GRO_CB(skb)->frag0_len = 0;
2934 : }
2935 :
2936 2133 : static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2937 : unsigned int offset)
2938 : {
2939 2133 : if (!pskb_may_pull(skb, hlen))
2940 : return NULL;
2941 :
2942 2133 : skb_gro_frag0_invalidate(skb);
2943 2133 : return skb->data + offset;
2944 : }
2945 :
2946 707 : static inline void *skb_gro_network_header(struct sk_buff *skb)
2947 : {
2948 707 : return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2949 705 : skb_network_offset(skb);
2950 : }
2951 :
2952 0 : static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2953 : const void *start, unsigned int len)
2954 : {
2955 0 : if (NAPI_GRO_CB(skb)->csum_valid)
2956 0 : NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2957 : csum_partial(start, len, 0));
2958 0 : }
2959 :
2960 : /* GRO checksum functions. These are logical equivalents of the normal
2961 : * checksum functions (in skbuff.h) except that they operate on the GRO
2962 : * offsets and fields in sk_buff.
2963 : */
2964 :
2965 : __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2966 :
2967 707 : static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2968 : {
2969 707 : return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2970 : }
2971 :
2972 707 : static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2973 : bool zero_okay,
2974 : __sum16 check)
2975 : {
2976 707 : return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2977 0 : skb_checksum_start_offset(skb) <
2978 0 : skb_gro_offset(skb)) &&
2979 707 : !skb_at_gro_remcsum_start(skb) &&
2980 1414 : NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2981 707 : (!zero_okay || check));
2982 : }
2983 :
2984 707 : static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2985 : __wsum psum)
2986 : {
2987 707 : if (NAPI_GRO_CB(skb)->csum_valid &&
2988 0 : !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2989 : return 0;
2990 :
2991 707 : NAPI_GRO_CB(skb)->csum = psum;
2992 :
2993 707 : return __skb_gro_checksum_complete(skb);
2994 : }
2995 :
2996 707 : static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2997 : {
2998 707 : if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2999 : /* Consume a checksum from CHECKSUM_UNNECESSARY */
3000 0 : NAPI_GRO_CB(skb)->csum_cnt--;
3001 : } else {
3002 : /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
3003 : * verified a new top level checksum or an encapsulated one
3004 : * during GRO. This saves work if we fallback to normal path.
3005 : */
3006 707 : __skb_incr_checksum_unnecessary(skb);
3007 : }
3008 707 : }
3009 :
3010 : #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
3011 : compute_pseudo) \
3012 : ({ \
3013 : __sum16 __ret = 0; \
3014 : if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
3015 : __ret = __skb_gro_checksum_validate_complete(skb, \
3016 : compute_pseudo(skb, proto)); \
3017 : if (!__ret) \
3018 : skb_gro_incr_csum_unnecessary(skb); \
3019 : __ret; \
3020 : })
3021 :
3022 : #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
3023 : __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
3024 :
3025 : #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
3026 : compute_pseudo) \
3027 : __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
3028 :
3029 : #define skb_gro_checksum_simple_validate(skb) \
3030 : __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
3031 :
3032 2 : static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
3033 : {
3034 2 : return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
3035 : !NAPI_GRO_CB(skb)->csum_valid);
3036 : }
3037 :
3038 0 : static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
3039 : __wsum pseudo)
3040 : {
3041 0 : NAPI_GRO_CB(skb)->csum = ~pseudo;
3042 0 : NAPI_GRO_CB(skb)->csum_valid = 1;
3043 0 : }
3044 :
3045 : #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
3046 : do { \
3047 : if (__skb_gro_checksum_convert_check(skb)) \
3048 : __skb_gro_checksum_convert(skb, \
3049 : compute_pseudo(skb, proto)); \
3050 : } while (0)
3051 :
3052 : struct gro_remcsum {
3053 : int offset;
3054 : __wsum delta;
3055 : };
3056 :
3057 : static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
3058 : {
3059 : grc->offset = 0;
3060 : grc->delta = 0;
3061 : }
3062 :
3063 : static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
3064 : unsigned int off, size_t hdrlen,
3065 : int start, int offset,
3066 : struct gro_remcsum *grc,
3067 : bool nopartial)
3068 : {
3069 : __wsum delta;
3070 : size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
3071 :
3072 : BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
3073 :
3074 : if (!nopartial) {
3075 : NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
3076 : return ptr;
3077 : }
3078 :
3079 : ptr = skb_gro_header_fast(skb, off);
3080 : if (skb_gro_header_hard(skb, off + plen)) {
3081 : ptr = skb_gro_header_slow(skb, off + plen, off);
3082 : if (!ptr)
3083 : return NULL;
3084 : }
3085 :
3086 : delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
3087 : start, offset);
3088 :
3089 : /* Adjust skb->csum since we changed the packet */
3090 : NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
3091 :
3092 : grc->offset = off + hdrlen + offset;
3093 : grc->delta = delta;
3094 :
3095 : return ptr;
3096 : }
3097 :
3098 : static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
3099 : struct gro_remcsum *grc)
3100 : {
3101 : void *ptr;
3102 : size_t plen = grc->offset + sizeof(u16);
3103 :
3104 : if (!grc->delta)
3105 : return;
3106 :
3107 : ptr = skb_gro_header_fast(skb, grc->offset);
3108 : if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
3109 : ptr = skb_gro_header_slow(skb, plen, grc->offset);
3110 : if (!ptr)
3111 : return;
3112 : }
3113 :
3114 : remcsum_unadjust((__sum16 *)ptr, grc->delta);
3115 : }
3116 :
3117 : #ifdef CONFIG_XFRM_OFFLOAD
3118 : static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
3119 : {
3120 : if (PTR_ERR(pp) != -EINPROGRESS)
3121 : NAPI_GRO_CB(skb)->flush |= flush;
3122 : }
3123 : static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
3124 : struct sk_buff *pp,
3125 : int flush,
3126 : struct gro_remcsum *grc)
3127 : {
3128 : if (PTR_ERR(pp) != -EINPROGRESS) {
3129 : NAPI_GRO_CB(skb)->flush |= flush;
3130 : skb_gro_remcsum_cleanup(skb, grc);
3131 : skb->remcsum_offload = 0;
3132 : }
3133 : }
3134 : #else
3135 723 : static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
3136 : {
3137 723 : NAPI_GRO_CB(skb)->flush |= flush;
3138 : }
3139 : static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
3140 : struct sk_buff *pp,
3141 : int flush,
3142 : struct gro_remcsum *grc)
3143 : {
3144 : NAPI_GRO_CB(skb)->flush |= flush;
3145 : skb_gro_remcsum_cleanup(skb, grc);
3146 : skb->remcsum_offload = 0;
3147 : }
3148 : #endif
3149 :
3150 10 : static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
3151 : unsigned short type,
3152 : const void *daddr, const void *saddr,
3153 : unsigned int len)
3154 : {
3155 10 : if (!dev->header_ops || !dev->header_ops->create)
3156 : return 0;
3157 :
3158 10 : return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
3159 : }
3160 :
3161 2 : static inline int dev_parse_header(const struct sk_buff *skb,
3162 : unsigned char *haddr)
3163 : {
3164 2 : const struct net_device *dev = skb->dev;
3165 :
3166 2 : if (!dev->header_ops || !dev->header_ops->parse)
3167 : return 0;
3168 2 : return dev->header_ops->parse(skb, haddr);
3169 : }
3170 :
3171 2 : static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
3172 : {
3173 2 : const struct net_device *dev = skb->dev;
3174 :
3175 2 : if (!dev->header_ops || !dev->header_ops->parse_protocol)
3176 : return 0;
3177 2 : return dev->header_ops->parse_protocol(skb);
3178 : }
3179 :
3180 : /* ll_header must have at least hard_header_len allocated */
3181 2 : static inline bool dev_validate_header(const struct net_device *dev,
3182 : char *ll_header, int len)
3183 : {
3184 2 : if (likely(len >= dev->hard_header_len))
3185 : return true;
3186 0 : if (len < dev->min_header_len)
3187 : return false;
3188 :
3189 0 : if (capable(CAP_SYS_RAWIO)) {
3190 0 : memset(ll_header + len, 0, dev->hard_header_len - len);
3191 0 : return true;
3192 : }
3193 :
3194 0 : if (dev->header_ops && dev->header_ops->validate)
3195 0 : return dev->header_ops->validate(ll_header, len);
3196 :
3197 : return false;
3198 : }
3199 :
3200 908 : static inline bool dev_has_header(const struct net_device *dev)
3201 : {
3202 908 : return dev->header_ops && dev->header_ops->create;
3203 : }
3204 :
3205 : typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
3206 : int len, int size);
3207 : int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
3208 : static inline int unregister_gifconf(unsigned int family)
3209 : {
3210 : return register_gifconf(family, NULL);
3211 : }
3212 :
3213 : #ifdef CONFIG_NET_FLOW_LIMIT
3214 : #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3215 : struct sd_flow_limit {
3216 : u64 count;
3217 : unsigned int num_buckets;
3218 : unsigned int history_head;
3219 : u16 history[FLOW_LIMIT_HISTORY];
3220 : u8 buckets[];
3221 : };
3222 :
3223 : extern int netdev_flow_limit_table_len;
3224 : #endif /* CONFIG_NET_FLOW_LIMIT */
3225 :
3226 : /*
3227 : * Incoming packets are placed on per-CPU queues
3228 : */
3229 : struct softnet_data {
3230 : struct list_head poll_list;
3231 : struct sk_buff_head process_queue;
3232 :
3233 : /* stats */
3234 : unsigned int processed;
3235 : unsigned int time_squeeze;
3236 : unsigned int received_rps;
3237 : #ifdef CONFIG_RPS
3238 : struct softnet_data *rps_ipi_list;
3239 : #endif
3240 : #ifdef CONFIG_NET_FLOW_LIMIT
3241 : struct sd_flow_limit __rcu *flow_limit;
3242 : #endif
3243 : struct Qdisc *output_queue;
3244 : struct Qdisc **output_queue_tailp;
3245 : struct sk_buff *completion_queue;
3246 : #ifdef CONFIG_XFRM_OFFLOAD
3247 : struct sk_buff_head xfrm_backlog;
3248 : #endif
3249 : /* written and read only by owning cpu: */
3250 : struct {
3251 : u16 recursion;
3252 : u8 more;
3253 : } xmit;
3254 : #ifdef CONFIG_RPS
3255 : /* input_queue_head should be written by cpu owning this struct,
3256 : * and only read by other cpus. Worth using a cache line.
3257 : */
3258 : unsigned int input_queue_head ____cacheline_aligned_in_smp;
3259 :
3260 : /* Elements below can be accessed between CPUs for RPS/RFS */
3261 : call_single_data_t csd ____cacheline_aligned_in_smp;
3262 : struct softnet_data *rps_ipi_next;
3263 : unsigned int cpu;
3264 : unsigned int input_queue_tail;
3265 : #endif
3266 : unsigned int dropped;
3267 : struct sk_buff_head input_pkt_queue;
3268 : struct napi_struct backlog;
3269 :
3270 : };
3271 :
3272 0 : static inline void input_queue_head_incr(struct softnet_data *sd)
3273 : {
3274 : #ifdef CONFIG_RPS
3275 0 : sd->input_queue_head++;
3276 : #endif
3277 0 : }
3278 :
3279 0 : static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3280 : unsigned int *qtail)
3281 : {
3282 : #ifdef CONFIG_RPS
3283 0 : *qtail = ++sd->input_queue_tail;
3284 : #endif
3285 : }
3286 :
3287 : DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3288 :
3289 0 : static inline int dev_recursion_level(void)
3290 : {
3291 0 : return this_cpu_read(softnet_data.xmit.recursion);
3292 : }
3293 :
3294 : #define XMIT_RECURSION_LIMIT 8
3295 0 : static inline bool dev_xmit_recursion(void)
3296 : {
3297 0 : return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3298 : XMIT_RECURSION_LIMIT);
3299 : }
3300 :
3301 0 : static inline void dev_xmit_recursion_inc(void)
3302 : {
3303 0 : __this_cpu_inc(softnet_data.xmit.recursion);
3304 : }
3305 :
3306 0 : static inline void dev_xmit_recursion_dec(void)
3307 : {
3308 0 : __this_cpu_dec(softnet_data.xmit.recursion);
3309 0 : }
3310 :
3311 : void __netif_schedule(struct Qdisc *q);
3312 : void netif_schedule_queue(struct netdev_queue *txq);
3313 :
3314 : static inline void netif_tx_schedule_all(struct net_device *dev)
3315 : {
3316 : unsigned int i;
3317 :
3318 : for (i = 0; i < dev->num_tx_queues; i++)
3319 : netif_schedule_queue(netdev_get_tx_queue(dev, i));
3320 : }
3321 :
3322 0 : static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3323 : {
3324 0 : clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3325 : }
3326 :
3327 : /**
3328 : * netif_start_queue - allow transmit
3329 : * @dev: network device
3330 : *
3331 : * Allow upper layers to call the device hard_start_xmit routine.
3332 : */
3333 : static inline void netif_start_queue(struct net_device *dev)
3334 : {
3335 : netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3336 : }
3337 :
3338 : static inline void netif_tx_start_all_queues(struct net_device *dev)
3339 : {
3340 : unsigned int i;
3341 :
3342 : for (i = 0; i < dev->num_tx_queues; i++) {
3343 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3344 : netif_tx_start_queue(txq);
3345 : }
3346 : }
3347 :
3348 : void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3349 :
3350 : /**
3351 : * netif_wake_queue - restart transmit
3352 : * @dev: network device
3353 : *
3354 : * Allow upper layers to call the device hard_start_xmit routine.
3355 : * Used for flow control when transmit resources are available.
3356 : */
3357 : static inline void netif_wake_queue(struct net_device *dev)
3358 : {
3359 : netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3360 : }
3361 :
3362 1 : static inline void netif_tx_wake_all_queues(struct net_device *dev)
3363 : {
3364 1 : unsigned int i;
3365 :
3366 2 : for (i = 0; i < dev->num_tx_queues; i++) {
3367 1 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3368 1 : netif_tx_wake_queue(txq);
3369 : }
3370 1 : }
3371 :
3372 0 : static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3373 : {
3374 0 : set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3375 : }
3376 :
3377 : /**
3378 : * netif_stop_queue - stop transmitted packets
3379 : * @dev: network device
3380 : *
3381 : * Stop upper layers calling the device hard_start_xmit routine.
3382 : * Used for flow control when transmit resources are unavailable.
3383 : */
3384 : static inline void netif_stop_queue(struct net_device *dev)
3385 : {
3386 : netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3387 : }
3388 :
3389 : void netif_tx_stop_all_queues(struct net_device *dev);
3390 :
3391 448 : static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3392 : {
3393 448 : return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3394 : }
3395 :
3396 : /**
3397 : * netif_queue_stopped - test if transmit queue is flowblocked
3398 : * @dev: network device
3399 : *
3400 : * Test if transmit queue on device is currently unable to send.
3401 : */
3402 : static inline bool netif_queue_stopped(const struct net_device *dev)
3403 : {
3404 : return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3405 : }
3406 :
3407 0 : static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3408 : {
3409 0 : return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3410 : }
3411 :
3412 : static inline bool
3413 1344 : netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3414 : {
3415 1344 : return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3416 : }
3417 :
3418 : static inline bool
3419 0 : netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3420 : {
3421 0 : return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3422 : }
3423 :
3424 : /**
3425 : * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3426 : * @dev_queue: pointer to transmit queue
3427 : *
3428 : * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3429 : * to give appropriate hint to the CPU.
3430 : */
3431 : static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3432 : {
3433 : #ifdef CONFIG_BQL
3434 : prefetchw(&dev_queue->dql.num_queued);
3435 : #endif
3436 : }
3437 :
3438 : /**
3439 : * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3440 : * @dev_queue: pointer to transmit queue
3441 : *
3442 : * BQL enabled drivers might use this helper in their TX completion path,
3443 : * to give appropriate hint to the CPU.
3444 : */
3445 : static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3446 : {
3447 : #ifdef CONFIG_BQL
3448 : prefetchw(&dev_queue->dql.limit);
3449 : #endif
3450 : }
3451 :
3452 : static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3453 : unsigned int bytes)
3454 : {
3455 : #ifdef CONFIG_BQL
3456 : dql_queued(&dev_queue->dql, bytes);
3457 :
3458 : if (likely(dql_avail(&dev_queue->dql) >= 0))
3459 : return;
3460 :
3461 : set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3462 :
3463 : /*
3464 : * The XOFF flag must be set before checking the dql_avail below,
3465 : * because in netdev_tx_completed_queue we update the dql_completed
3466 : * before checking the XOFF flag.
3467 : */
3468 : smp_mb();
3469 :
3470 : /* check again in case another CPU has just made room avail */
3471 : if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3472 : clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3473 : #endif
3474 : }
3475 :
3476 : /* Variant of netdev_tx_sent_queue() for drivers that are aware
3477 : * that they should not test BQL status themselves.
3478 : * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3479 : * skb of a batch.
3480 : * Returns true if the doorbell must be used to kick the NIC.
3481 : */
3482 : static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3483 : unsigned int bytes,
3484 : bool xmit_more)
3485 : {
3486 : if (xmit_more) {
3487 : #ifdef CONFIG_BQL
3488 : dql_queued(&dev_queue->dql, bytes);
3489 : #endif
3490 : return netif_tx_queue_stopped(dev_queue);
3491 : }
3492 : netdev_tx_sent_queue(dev_queue, bytes);
3493 : return true;
3494 : }
3495 :
3496 : /**
3497 : * netdev_sent_queue - report the number of bytes queued to hardware
3498 : * @dev: network device
3499 : * @bytes: number of bytes queued to the hardware device queue
3500 : *
3501 : * Report the number of bytes queued for sending/completion to the network
3502 : * device hardware queue. @bytes should be a good approximation and should
3503 : * exactly match netdev_completed_queue() @bytes
3504 : */
3505 : static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3506 : {
3507 : netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3508 : }
3509 :
3510 : static inline bool __netdev_sent_queue(struct net_device *dev,
3511 : unsigned int bytes,
3512 : bool xmit_more)
3513 : {
3514 : return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3515 : xmit_more);
3516 : }
3517 :
3518 : static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3519 : unsigned int pkts, unsigned int bytes)
3520 : {
3521 : #ifdef CONFIG_BQL
3522 : if (unlikely(!bytes))
3523 : return;
3524 :
3525 : dql_completed(&dev_queue->dql, bytes);
3526 :
3527 : /*
3528 : * Without the memory barrier there is a small possiblity that
3529 : * netdev_tx_sent_queue will miss the update and cause the queue to
3530 : * be stopped forever
3531 : */
3532 : smp_mb();
3533 :
3534 : if (unlikely(dql_avail(&dev_queue->dql) < 0))
3535 : return;
3536 :
3537 : if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3538 : netif_schedule_queue(dev_queue);
3539 : #endif
3540 : }
3541 :
3542 : /**
3543 : * netdev_completed_queue - report bytes and packets completed by device
3544 : * @dev: network device
3545 : * @pkts: actual number of packets sent over the medium
3546 : * @bytes: actual number of bytes sent over the medium
3547 : *
3548 : * Report the number of bytes and packets transmitted by the network device
3549 : * hardware queue over the physical medium, @bytes must exactly match the
3550 : * @bytes amount passed to netdev_sent_queue()
3551 : */
3552 : static inline void netdev_completed_queue(struct net_device *dev,
3553 : unsigned int pkts, unsigned int bytes)
3554 : {
3555 : netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3556 : }
3557 :
3558 : static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3559 : {
3560 : #ifdef CONFIG_BQL
3561 : clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3562 : dql_reset(&q->dql);
3563 : #endif
3564 : }
3565 :
3566 : /**
3567 : * netdev_reset_queue - reset the packets and bytes count of a network device
3568 : * @dev_queue: network device
3569 : *
3570 : * Reset the bytes and packet count of a network device and clear the
3571 : * software flow control OFF bit for this network device
3572 : */
3573 : static inline void netdev_reset_queue(struct net_device *dev_queue)
3574 : {
3575 : netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3576 : }
3577 :
3578 : /**
3579 : * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3580 : * @dev: network device
3581 : * @queue_index: given tx queue index
3582 : *
3583 : * Returns 0 if given tx queue index >= number of device tx queues,
3584 : * otherwise returns the originally passed tx queue index.
3585 : */
3586 0 : static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3587 : {
3588 0 : if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3589 0 : net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3590 : dev->name, queue_index,
3591 : dev->real_num_tx_queues);
3592 0 : return 0;
3593 : }
3594 :
3595 : return queue_index;
3596 : }
3597 :
3598 : /**
3599 : * netif_running - test if up
3600 : * @dev: network device
3601 : *
3602 : * Test if the device has been brought up.
3603 : */
3604 37 : static inline bool netif_running(const struct net_device *dev)
3605 : {
3606 37 : return test_bit(__LINK_STATE_START, &dev->state);
3607 : }
3608 :
3609 : /*
3610 : * Routines to manage the subqueues on a device. We only need start,
3611 : * stop, and a check if it's stopped. All other device management is
3612 : * done at the overall netdevice level.
3613 : * Also test the device if we're multiqueue.
3614 : */
3615 :
3616 : /**
3617 : * netif_start_subqueue - allow sending packets on subqueue
3618 : * @dev: network device
3619 : * @queue_index: sub queue index
3620 : *
3621 : * Start individual transmit queue of a device with multiple transmit queues.
3622 : */
3623 0 : static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3624 : {
3625 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3626 :
3627 0 : netif_tx_start_queue(txq);
3628 : }
3629 :
3630 : /**
3631 : * netif_stop_subqueue - stop sending packets on subqueue
3632 : * @dev: network device
3633 : * @queue_index: sub queue index
3634 : *
3635 : * Stop individual transmit queue of a device with multiple transmit queues.
3636 : */
3637 0 : static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3638 : {
3639 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3640 0 : netif_tx_stop_queue(txq);
3641 : }
3642 :
3643 : /**
3644 : * __netif_subqueue_stopped - test status of subqueue
3645 : * @dev: network device
3646 : * @queue_index: sub queue index
3647 : *
3648 : * Check individual transmit queue of a device with multiple transmit queues.
3649 : */
3650 : static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3651 : u16 queue_index)
3652 : {
3653 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3654 :
3655 : return netif_tx_queue_stopped(txq);
3656 : }
3657 :
3658 : /**
3659 : * netif_subqueue_stopped - test status of subqueue
3660 : * @dev: network device
3661 : * @skb: sub queue buffer pointer
3662 : *
3663 : * Check individual transmit queue of a device with multiple transmit queues.
3664 : */
3665 : static inline bool netif_subqueue_stopped(const struct net_device *dev,
3666 : struct sk_buff *skb)
3667 : {
3668 : return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3669 : }
3670 :
3671 : /**
3672 : * netif_wake_subqueue - allow sending packets on subqueue
3673 : * @dev: network device
3674 : * @queue_index: sub queue index
3675 : *
3676 : * Resume individual transmit queue of a device with multiple transmit queues.
3677 : */
3678 0 : static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3679 : {
3680 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3681 :
3682 0 : netif_tx_wake_queue(txq);
3683 0 : }
3684 :
3685 : #ifdef CONFIG_XPS
3686 : int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3687 : u16 index);
3688 : int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3689 : u16 index, bool is_rxqs_map);
3690 :
3691 : /**
3692 : * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3693 : * @j: CPU/Rx queue index
3694 : * @mask: bitmask of all cpus/rx queues
3695 : * @nr_bits: number of bits in the bitmask
3696 : *
3697 : * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3698 : */
3699 8 : static inline bool netif_attr_test_mask(unsigned long j,
3700 : const unsigned long *mask,
3701 : unsigned int nr_bits)
3702 : {
3703 8 : cpu_max_bits_warn(j, nr_bits);
3704 8 : return test_bit(j, mask);
3705 : }
3706 :
3707 : /**
3708 : * netif_attr_test_online - Test for online CPU/Rx queue
3709 : * @j: CPU/Rx queue index
3710 : * @online_mask: bitmask for CPUs/Rx queues that are online
3711 : * @nr_bits: number of bits in the bitmask
3712 : *
3713 : * Returns true if a CPU/Rx queue is online.
3714 : */
3715 8 : static inline bool netif_attr_test_online(unsigned long j,
3716 : const unsigned long *online_mask,
3717 : unsigned int nr_bits)
3718 : {
3719 8 : cpu_max_bits_warn(j, nr_bits);
3720 :
3721 8 : if (online_mask)
3722 8 : return test_bit(j, online_mask);
3723 :
3724 0 : return (j < nr_bits);
3725 : }
3726 :
3727 : /**
3728 : * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3729 : * @n: CPU/Rx queue index
3730 : * @srcp: the cpumask/Rx queue mask pointer
3731 : * @nr_bits: number of bits in the bitmask
3732 : *
3733 : * Returns >= nr_bits if no further CPUs/Rx queues set.
3734 : */
3735 10 : static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3736 : unsigned int nr_bits)
3737 : {
3738 : /* -1 is a legal arg here. */
3739 10 : if (n != -1)
3740 10 : cpu_max_bits_warn(n, nr_bits);
3741 :
3742 10 : if (srcp)
3743 10 : return find_next_bit(srcp, nr_bits, n + 1);
3744 :
3745 0 : return n + 1;
3746 : }
3747 :
3748 : /**
3749 : * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
3750 : * @n: CPU/Rx queue index
3751 : * @src1p: the first CPUs/Rx queues mask pointer
3752 : * @src2p: the second CPUs/Rx queues mask pointer
3753 : * @nr_bits: number of bits in the bitmask
3754 : *
3755 : * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3756 : */
3757 5 : static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3758 : const unsigned long *src2p,
3759 : unsigned int nr_bits)
3760 : {
3761 : /* -1 is a legal arg here. */
3762 5 : if (n != -1)
3763 5 : cpu_max_bits_warn(n, nr_bits);
3764 :
3765 5 : if (src1p && src2p)
3766 5 : return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3767 0 : else if (src1p)
3768 0 : return find_next_bit(src1p, nr_bits, n + 1);
3769 0 : else if (src2p)
3770 0 : return find_next_bit(src2p, nr_bits, n + 1);
3771 :
3772 0 : return n + 1;
3773 : }
3774 : #else
3775 : static inline int netif_set_xps_queue(struct net_device *dev,
3776 : const struct cpumask *mask,
3777 : u16 index)
3778 : {
3779 : return 0;
3780 : }
3781 :
3782 : static inline int __netif_set_xps_queue(struct net_device *dev,
3783 : const unsigned long *mask,
3784 : u16 index, bool is_rxqs_map)
3785 : {
3786 : return 0;
3787 : }
3788 : #endif
3789 :
3790 : /**
3791 : * netif_is_multiqueue - test if device has multiple transmit queues
3792 : * @dev: network device
3793 : *
3794 : * Check if device has multiple transmit queues
3795 : */
3796 6 : static inline bool netif_is_multiqueue(const struct net_device *dev)
3797 : {
3798 6 : return dev->num_tx_queues > 1;
3799 : }
3800 :
3801 : int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3802 :
3803 : #ifdef CONFIG_SYSFS
3804 : int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3805 : #else
3806 : static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3807 : unsigned int rxqs)
3808 : {
3809 : dev->real_num_rx_queues = rxqs;
3810 : return 0;
3811 : }
3812 : #endif
3813 :
3814 : static inline struct netdev_rx_queue *
3815 : __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3816 : {
3817 : return dev->_rx + rxq;
3818 : }
3819 :
3820 : #ifdef CONFIG_SYSFS
3821 0 : static inline unsigned int get_netdev_rx_queue_index(
3822 : struct netdev_rx_queue *queue)
3823 : {
3824 0 : struct net_device *dev = queue->dev;
3825 0 : int index = queue - dev->_rx;
3826 :
3827 0 : BUG_ON(index >= dev->num_rx_queues);
3828 0 : return index;
3829 : }
3830 : #endif
3831 :
3832 : #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3833 : int netif_get_num_default_rss_queues(void);
3834 :
3835 : enum skb_free_reason {
3836 : SKB_REASON_CONSUMED,
3837 : SKB_REASON_DROPPED,
3838 : };
3839 :
3840 : void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3841 : void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3842 :
3843 : /*
3844 : * It is not allowed to call kfree_skb() or consume_skb() from hardware
3845 : * interrupt context or with hardware interrupts being disabled.
3846 : * (in_irq() || irqs_disabled())
3847 : *
3848 : * We provide four helpers that can be used in following contexts :
3849 : *
3850 : * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3851 : * replacing kfree_skb(skb)
3852 : *
3853 : * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3854 : * Typically used in place of consume_skb(skb) in TX completion path
3855 : *
3856 : * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3857 : * replacing kfree_skb(skb)
3858 : *
3859 : * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3860 : * and consumed a packet. Used in place of consume_skb(skb)
3861 : */
3862 0 : static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3863 : {
3864 0 : __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3865 : }
3866 :
3867 : static inline void dev_consume_skb_irq(struct sk_buff *skb)
3868 : {
3869 : __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3870 : }
3871 :
3872 0 : static inline void dev_kfree_skb_any(struct sk_buff *skb)
3873 : {
3874 0 : __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3875 : }
3876 :
3877 35 : static inline void dev_consume_skb_any(struct sk_buff *skb)
3878 : {
3879 35 : __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3880 : }
3881 :
3882 : void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3883 : int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3884 : int netif_rx(struct sk_buff *skb);
3885 : int netif_rx_ni(struct sk_buff *skb);
3886 : int netif_rx_any_context(struct sk_buff *skb);
3887 : int netif_receive_skb(struct sk_buff *skb);
3888 : int netif_receive_skb_core(struct sk_buff *skb);
3889 : void netif_receive_skb_list(struct list_head *head);
3890 : gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3891 : void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3892 : struct sk_buff *napi_get_frags(struct napi_struct *napi);
3893 : gro_result_t napi_gro_frags(struct napi_struct *napi);
3894 : struct packet_offload *gro_find_receive_by_type(__be16 type);
3895 : struct packet_offload *gro_find_complete_by_type(__be16 type);
3896 :
3897 0 : static inline void napi_free_frags(struct napi_struct *napi)
3898 : {
3899 0 : kfree_skb(napi->skb);
3900 0 : napi->skb = NULL;
3901 : }
3902 :
3903 : bool netdev_is_rx_handler_busy(struct net_device *dev);
3904 : int netdev_rx_handler_register(struct net_device *dev,
3905 : rx_handler_func_t *rx_handler,
3906 : void *rx_handler_data);
3907 : void netdev_rx_handler_unregister(struct net_device *dev);
3908 :
3909 : bool dev_valid_name(const char *name);
3910 : int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3911 : bool *need_copyout);
3912 : int dev_ifconf(struct net *net, struct ifconf *, int);
3913 : int dev_ethtool(struct net *net, struct ifreq *);
3914 : unsigned int dev_get_flags(const struct net_device *);
3915 : int __dev_change_flags(struct net_device *dev, unsigned int flags,
3916 : struct netlink_ext_ack *extack);
3917 : int dev_change_flags(struct net_device *dev, unsigned int flags,
3918 : struct netlink_ext_ack *extack);
3919 : void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3920 : unsigned int gchanges);
3921 : int dev_change_name(struct net_device *, const char *);
3922 : int dev_set_alias(struct net_device *, const char *, size_t);
3923 : int dev_get_alias(const struct net_device *, char *, size_t);
3924 : int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3925 : int __dev_set_mtu(struct net_device *, int);
3926 : int dev_validate_mtu(struct net_device *dev, int mtu,
3927 : struct netlink_ext_ack *extack);
3928 : int dev_set_mtu_ext(struct net_device *dev, int mtu,
3929 : struct netlink_ext_ack *extack);
3930 : int dev_set_mtu(struct net_device *, int);
3931 : int dev_change_tx_queue_len(struct net_device *, unsigned long);
3932 : void dev_set_group(struct net_device *, int);
3933 : int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3934 : struct netlink_ext_ack *extack);
3935 : int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3936 : struct netlink_ext_ack *extack);
3937 : int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
3938 : struct netlink_ext_ack *extack);
3939 : int dev_get_mac_address(struct sockaddr *sa, struct net *net, char *dev_name);
3940 : int dev_change_carrier(struct net_device *, bool new_carrier);
3941 : int dev_get_phys_port_id(struct net_device *dev,
3942 : struct netdev_phys_item_id *ppid);
3943 : int dev_get_phys_port_name(struct net_device *dev,
3944 : char *name, size_t len);
3945 : int dev_get_port_parent_id(struct net_device *dev,
3946 : struct netdev_phys_item_id *ppid, bool recurse);
3947 : bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3948 : int dev_change_proto_down(struct net_device *dev, bool proto_down);
3949 : int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3950 : void dev_change_proto_down_reason(struct net_device *dev, unsigned long mask,
3951 : u32 value);
3952 : struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3953 : struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3954 : struct netdev_queue *txq, int *ret);
3955 :
3956 : typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3957 : int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3958 : int fd, int expected_fd, u32 flags);
3959 : int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog);
3960 : u32 dev_xdp_prog_id(struct net_device *dev, enum bpf_xdp_mode mode);
3961 :
3962 : int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3963 : int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3964 : int dev_forward_skb_nomtu(struct net_device *dev, struct sk_buff *skb);
3965 : bool is_skb_forwardable(const struct net_device *dev,
3966 : const struct sk_buff *skb);
3967 :
3968 0 : static __always_inline bool __is_skb_forwardable(const struct net_device *dev,
3969 : const struct sk_buff *skb,
3970 : const bool check_mtu)
3971 : {
3972 0 : const u32 vlan_hdr_len = 4; /* VLAN_HLEN */
3973 0 : unsigned int len;
3974 :
3975 0 : if (!(dev->flags & IFF_UP))
3976 : return false;
3977 :
3978 0 : if (!check_mtu)
3979 : return true;
3980 :
3981 0 : len = dev->mtu + dev->hard_header_len + vlan_hdr_len;
3982 0 : if (skb->len <= len)
3983 : return true;
3984 :
3985 : /* if TSO is enabled, we don't care about the length as the packet
3986 : * could be forwarded without being segmented before
3987 : */
3988 0 : if (skb_is_gso(skb))
3989 0 : return true;
3990 :
3991 : return false;
3992 : }
3993 :
3994 0 : static __always_inline int ____dev_forward_skb(struct net_device *dev,
3995 : struct sk_buff *skb,
3996 : const bool check_mtu)
3997 : {
3998 0 : if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3999 0 : unlikely(!__is_skb_forwardable(dev, skb, check_mtu))) {
4000 0 : atomic_long_inc(&dev->rx_dropped);
4001 0 : kfree_skb(skb);
4002 0 : return NET_RX_DROP;
4003 : }
4004 :
4005 0 : skb_scrub_packet(skb, true);
4006 0 : skb->priority = 0;
4007 0 : return 0;
4008 : }
4009 :
4010 : bool dev_nit_active(struct net_device *dev);
4011 : void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
4012 :
4013 : extern int netdev_budget;
4014 : extern unsigned int netdev_budget_usecs;
4015 :
4016 : /* Called by rtnetlink.c:rtnl_unlock() */
4017 : void netdev_run_todo(void);
4018 :
4019 : /**
4020 : * dev_put - release reference to device
4021 : * @dev: network device
4022 : *
4023 : * Release reference to device to allow it to be freed.
4024 : */
4025 17 : static inline void dev_put(struct net_device *dev)
4026 : {
4027 17 : this_cpu_dec(*dev->pcpu_refcnt);
4028 13 : }
4029 :
4030 : /**
4031 : * dev_hold - get reference to device
4032 : * @dev: network device
4033 : *
4034 : * Hold reference to device to keep it from being freed.
4035 : */
4036 48 : static inline void dev_hold(struct net_device *dev)
4037 : {
4038 48 : this_cpu_inc(*dev->pcpu_refcnt);
4039 25 : }
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 :
4050 : void linkwatch_init_dev(struct net_device *dev);
4051 : void linkwatch_fire_event(struct net_device *dev);
4052 : void linkwatch_forget_dev(struct net_device *dev);
4053 :
4054 : /**
4055 : * netif_carrier_ok - test if carrier present
4056 : * @dev: network device
4057 : *
4058 : * Check if carrier is present on device
4059 : */
4060 41 : static inline bool netif_carrier_ok(const struct net_device *dev)
4061 : {
4062 41 : return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
4063 : }
4064 :
4065 : unsigned long dev_trans_start(struct net_device *dev);
4066 :
4067 : void __netdev_watchdog_up(struct net_device *dev);
4068 :
4069 : void netif_carrier_on(struct net_device *dev);
4070 :
4071 : void netif_carrier_off(struct net_device *dev);
4072 :
4073 : /**
4074 : * netif_dormant_on - mark device as dormant.
4075 : * @dev: network device
4076 : *
4077 : * Mark device as dormant (as per RFC2863).
4078 : *
4079 : * The dormant state indicates that the relevant interface is not
4080 : * actually in a condition to pass packets (i.e., it is not 'up') but is
4081 : * in a "pending" state, waiting for some external event. For "on-
4082 : * demand" interfaces, this new state identifies the situation where the
4083 : * interface is waiting for events to place it in the up state.
4084 : */
4085 0 : static inline void netif_dormant_on(struct net_device *dev)
4086 : {
4087 0 : if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
4088 0 : linkwatch_fire_event(dev);
4089 0 : }
4090 :
4091 : /**
4092 : * netif_dormant_off - set device as not dormant.
4093 : * @dev: network device
4094 : *
4095 : * Device is not in dormant state.
4096 : */
4097 0 : static inline void netif_dormant_off(struct net_device *dev)
4098 : {
4099 0 : if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
4100 0 : linkwatch_fire_event(dev);
4101 0 : }
4102 :
4103 : /**
4104 : * netif_dormant - test if device is dormant
4105 : * @dev: network device
4106 : *
4107 : * Check if device is dormant.
4108 : */
4109 13 : static inline bool netif_dormant(const struct net_device *dev)
4110 : {
4111 13 : return test_bit(__LINK_STATE_DORMANT, &dev->state);
4112 : }
4113 :
4114 :
4115 : /**
4116 : * netif_testing_on - mark device as under test.
4117 : * @dev: network device
4118 : *
4119 : * Mark device as under test (as per RFC2863).
4120 : *
4121 : * The testing state indicates that some test(s) must be performed on
4122 : * the interface. After completion, of the test, the interface state
4123 : * will change to up, dormant, or down, as appropriate.
4124 : */
4125 0 : static inline void netif_testing_on(struct net_device *dev)
4126 : {
4127 0 : if (!test_and_set_bit(__LINK_STATE_TESTING, &dev->state))
4128 0 : linkwatch_fire_event(dev);
4129 0 : }
4130 :
4131 : /**
4132 : * netif_testing_off - set device as not under test.
4133 : * @dev: network device
4134 : *
4135 : * Device is not in testing state.
4136 : */
4137 0 : static inline void netif_testing_off(struct net_device *dev)
4138 : {
4139 0 : if (test_and_clear_bit(__LINK_STATE_TESTING, &dev->state))
4140 0 : linkwatch_fire_event(dev);
4141 0 : }
4142 :
4143 : /**
4144 : * netif_testing - test if device is under test
4145 : * @dev: network device
4146 : *
4147 : * Check if device is under test
4148 : */
4149 4 : static inline bool netif_testing(const struct net_device *dev)
4150 : {
4151 4 : return test_bit(__LINK_STATE_TESTING, &dev->state);
4152 : }
4153 :
4154 :
4155 : /**
4156 : * netif_oper_up - test if device is operational
4157 : * @dev: network device
4158 : *
4159 : * Check if carrier is operational
4160 : */
4161 10 : static inline bool netif_oper_up(const struct net_device *dev)
4162 : {
4163 10 : return (dev->operstate == IF_OPER_UP ||
4164 : dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
4165 : }
4166 :
4167 : /**
4168 : * netif_device_present - is device available or removed
4169 : * @dev: network device
4170 : *
4171 : * Check if device has not been removed from system.
4172 : */
4173 14 : static inline bool netif_device_present(struct net_device *dev)
4174 : {
4175 14 : return test_bit(__LINK_STATE_PRESENT, &dev->state);
4176 : }
4177 :
4178 : void netif_device_detach(struct net_device *dev);
4179 :
4180 : void netif_device_attach(struct net_device *dev);
4181 :
4182 : /*
4183 : * Network interface message level settings
4184 : */
4185 :
4186 : enum {
4187 : NETIF_MSG_DRV_BIT,
4188 : NETIF_MSG_PROBE_BIT,
4189 : NETIF_MSG_LINK_BIT,
4190 : NETIF_MSG_TIMER_BIT,
4191 : NETIF_MSG_IFDOWN_BIT,
4192 : NETIF_MSG_IFUP_BIT,
4193 : NETIF_MSG_RX_ERR_BIT,
4194 : NETIF_MSG_TX_ERR_BIT,
4195 : NETIF_MSG_TX_QUEUED_BIT,
4196 : NETIF_MSG_INTR_BIT,
4197 : NETIF_MSG_TX_DONE_BIT,
4198 : NETIF_MSG_RX_STATUS_BIT,
4199 : NETIF_MSG_PKTDATA_BIT,
4200 : NETIF_MSG_HW_BIT,
4201 : NETIF_MSG_WOL_BIT,
4202 :
4203 : /* When you add a new bit above, update netif_msg_class_names array
4204 : * in net/ethtool/common.c
4205 : */
4206 : NETIF_MSG_CLASS_COUNT,
4207 : };
4208 : /* Both ethtool_ops interface and internal driver implementation use u32 */
4209 : static_assert(NETIF_MSG_CLASS_COUNT <= 32);
4210 :
4211 : #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
4212 : #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
4213 :
4214 : #define NETIF_MSG_DRV __NETIF_MSG(DRV)
4215 : #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
4216 : #define NETIF_MSG_LINK __NETIF_MSG(LINK)
4217 : #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
4218 : #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
4219 : #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
4220 : #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
4221 : #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
4222 : #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
4223 : #define NETIF_MSG_INTR __NETIF_MSG(INTR)
4224 : #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
4225 : #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
4226 : #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
4227 : #define NETIF_MSG_HW __NETIF_MSG(HW)
4228 : #define NETIF_MSG_WOL __NETIF_MSG(WOL)
4229 :
4230 : #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
4231 : #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
4232 : #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
4233 : #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
4234 : #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
4235 : #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
4236 : #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
4237 : #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
4238 : #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
4239 : #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
4240 : #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
4241 : #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
4242 : #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
4243 : #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
4244 : #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
4245 :
4246 : static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
4247 : {
4248 : /* use default */
4249 : if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
4250 : return default_msg_enable_bits;
4251 : if (debug_value == 0) /* no output */
4252 : return 0;
4253 : /* set low N bits */
4254 : return (1U << debug_value) - 1;
4255 : }
4256 :
4257 885 : static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
4258 : {
4259 885 : spin_lock(&txq->_xmit_lock);
4260 885 : txq->xmit_lock_owner = cpu;
4261 448 : }
4262 :
4263 : static inline bool __netif_tx_acquire(struct netdev_queue *txq)
4264 : {
4265 : __acquire(&txq->_xmit_lock);
4266 : return true;
4267 : }
4268 :
4269 : static inline void __netif_tx_release(struct netdev_queue *txq)
4270 : {
4271 : __release(&txq->_xmit_lock);
4272 : }
4273 :
4274 : static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4275 : {
4276 : spin_lock_bh(&txq->_xmit_lock);
4277 : txq->xmit_lock_owner = smp_processor_id();
4278 : }
4279 :
4280 418 : static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4281 : {
4282 418 : bool ok = spin_trylock(&txq->_xmit_lock);
4283 418 : if (likely(ok))
4284 413 : txq->xmit_lock_owner = smp_processor_id();
4285 418 : return ok;
4286 : }
4287 :
4288 1298 : static inline void __netif_tx_unlock(struct netdev_queue *txq)
4289 : {
4290 1298 : txq->xmit_lock_owner = -1;
4291 1298 : spin_unlock(&txq->_xmit_lock);
4292 861 : }
4293 :
4294 : static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4295 : {
4296 : txq->xmit_lock_owner = -1;
4297 : spin_unlock_bh(&txq->_xmit_lock);
4298 : }
4299 :
4300 448 : static inline void txq_trans_update(struct netdev_queue *txq)
4301 : {
4302 448 : if (txq->xmit_lock_owner != -1)
4303 448 : txq->trans_start = jiffies;
4304 : }
4305 :
4306 : /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4307 3 : static inline void netif_trans_update(struct net_device *dev)
4308 : {
4309 3 : struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4310 :
4311 3 : if (txq->trans_start != jiffies)
4312 3 : txq->trans_start = jiffies;
4313 : }
4314 :
4315 : /**
4316 : * netif_tx_lock - grab network device transmit lock
4317 : * @dev: network device
4318 : *
4319 : * Get network device transmit lock
4320 : */
4321 0 : static inline void netif_tx_lock(struct net_device *dev)
4322 : {
4323 0 : unsigned int i;
4324 0 : int cpu;
4325 :
4326 0 : spin_lock(&dev->tx_global_lock);
4327 0 : cpu = smp_processor_id();
4328 0 : for (i = 0; i < dev->num_tx_queues; i++) {
4329 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4330 :
4331 : /* We are the only thread of execution doing a
4332 : * freeze, but we have to grab the _xmit_lock in
4333 : * order to synchronize with threads which are in
4334 : * the ->hard_start_xmit() handler and already
4335 : * checked the frozen bit.
4336 : */
4337 0 : __netif_tx_lock(txq, cpu);
4338 0 : set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4339 0 : __netif_tx_unlock(txq);
4340 : }
4341 0 : }
4342 :
4343 0 : static inline void netif_tx_lock_bh(struct net_device *dev)
4344 : {
4345 0 : local_bh_disable();
4346 0 : netif_tx_lock(dev);
4347 0 : }
4348 :
4349 0 : static inline void netif_tx_unlock(struct net_device *dev)
4350 : {
4351 0 : unsigned int i;
4352 :
4353 0 : for (i = 0; i < dev->num_tx_queues; i++) {
4354 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4355 :
4356 : /* No need to grab the _xmit_lock here. If the
4357 : * queue is not stopped for another reason, we
4358 : * force a schedule.
4359 : */
4360 0 : clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4361 0 : netif_schedule_queue(txq);
4362 : }
4363 0 : spin_unlock(&dev->tx_global_lock);
4364 0 : }
4365 :
4366 0 : static inline void netif_tx_unlock_bh(struct net_device *dev)
4367 : {
4368 0 : netif_tx_unlock(dev);
4369 0 : local_bh_enable();
4370 0 : }
4371 :
4372 : #define HARD_TX_LOCK(dev, txq, cpu) { \
4373 : if ((dev->features & NETIF_F_LLTX) == 0) { \
4374 : __netif_tx_lock(txq, cpu); \
4375 : } else { \
4376 : __netif_tx_acquire(txq); \
4377 : } \
4378 : }
4379 :
4380 : #define HARD_TX_TRYLOCK(dev, txq) \
4381 : (((dev->features & NETIF_F_LLTX) == 0) ? \
4382 : __netif_tx_trylock(txq) : \
4383 : __netif_tx_acquire(txq))
4384 :
4385 : #define HARD_TX_UNLOCK(dev, txq) { \
4386 : if ((dev->features & NETIF_F_LLTX) == 0) { \
4387 : __netif_tx_unlock(txq); \
4388 : } else { \
4389 : __netif_tx_release(txq); \
4390 : } \
4391 : }
4392 :
4393 0 : static inline void netif_tx_disable(struct net_device *dev)
4394 : {
4395 0 : unsigned int i;
4396 0 : int cpu;
4397 :
4398 0 : local_bh_disable();
4399 0 : cpu = smp_processor_id();
4400 0 : spin_lock(&dev->tx_global_lock);
4401 0 : for (i = 0; i < dev->num_tx_queues; i++) {
4402 0 : struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4403 :
4404 0 : __netif_tx_lock(txq, cpu);
4405 0 : netif_tx_stop_queue(txq);
4406 0 : __netif_tx_unlock(txq);
4407 : }
4408 0 : spin_unlock(&dev->tx_global_lock);
4409 0 : local_bh_enable();
4410 0 : }
4411 :
4412 0 : static inline void netif_addr_lock(struct net_device *dev)
4413 : {
4414 0 : unsigned char nest_level = 0;
4415 :
4416 : #ifdef CONFIG_LOCKDEP
4417 0 : nest_level = dev->nested_level;
4418 : #endif
4419 0 : spin_lock_nested(&dev->addr_list_lock, nest_level);
4420 : }
4421 :
4422 6 : static inline void netif_addr_lock_bh(struct net_device *dev)
4423 : {
4424 6 : unsigned char nest_level = 0;
4425 :
4426 : #ifdef CONFIG_LOCKDEP
4427 6 : nest_level = dev->nested_level;
4428 : #endif
4429 6 : local_bh_disable();
4430 6 : spin_lock_nested(&dev->addr_list_lock, nest_level);
4431 6 : }
4432 :
4433 0 : static inline void netif_addr_unlock(struct net_device *dev)
4434 : {
4435 0 : spin_unlock(&dev->addr_list_lock);
4436 : }
4437 :
4438 6 : static inline void netif_addr_unlock_bh(struct net_device *dev)
4439 : {
4440 6 : spin_unlock_bh(&dev->addr_list_lock);
4441 0 : }
4442 :
4443 : /*
4444 : * dev_addrs walker. Should be used only for read access. Call with
4445 : * rcu_read_lock held.
4446 : */
4447 : #define for_each_dev_addr(dev, ha) \
4448 : list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4449 :
4450 : /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4451 :
4452 : void ether_setup(struct net_device *dev);
4453 :
4454 : /* Support for loadable net-drivers */
4455 : struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4456 : unsigned char name_assign_type,
4457 : void (*setup)(struct net_device *),
4458 : unsigned int txqs, unsigned int rxqs);
4459 : #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4460 : alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4461 :
4462 : #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4463 : alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4464 : count)
4465 :
4466 : int register_netdev(struct net_device *dev);
4467 : void unregister_netdev(struct net_device *dev);
4468 :
4469 : int devm_register_netdev(struct device *dev, struct net_device *ndev);
4470 :
4471 : /* General hardware address lists handling functions */
4472 : int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4473 : struct netdev_hw_addr_list *from_list, int addr_len);
4474 : void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4475 : struct netdev_hw_addr_list *from_list, int addr_len);
4476 : int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4477 : struct net_device *dev,
4478 : int (*sync)(struct net_device *, const unsigned char *),
4479 : int (*unsync)(struct net_device *,
4480 : const unsigned char *));
4481 : int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4482 : struct net_device *dev,
4483 : int (*sync)(struct net_device *,
4484 : const unsigned char *, int),
4485 : int (*unsync)(struct net_device *,
4486 : const unsigned char *, int));
4487 : void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4488 : struct net_device *dev,
4489 : int (*unsync)(struct net_device *,
4490 : const unsigned char *, int));
4491 : void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4492 : struct net_device *dev,
4493 : int (*unsync)(struct net_device *,
4494 : const unsigned char *));
4495 : void __hw_addr_init(struct netdev_hw_addr_list *list);
4496 :
4497 : /* Functions used for device addresses handling */
4498 : int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4499 : unsigned char addr_type);
4500 : int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4501 : unsigned char addr_type);
4502 : void dev_addr_flush(struct net_device *dev);
4503 : int dev_addr_init(struct net_device *dev);
4504 :
4505 : /* Functions used for unicast addresses handling */
4506 : int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4507 : int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4508 : int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4509 : int dev_uc_sync(struct net_device *to, struct net_device *from);
4510 : int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4511 : void dev_uc_unsync(struct net_device *to, struct net_device *from);
4512 : void dev_uc_flush(struct net_device *dev);
4513 : void dev_uc_init(struct net_device *dev);
4514 :
4515 : /**
4516 : * __dev_uc_sync - Synchonize device's unicast list
4517 : * @dev: device to sync
4518 : * @sync: function to call if address should be added
4519 : * @unsync: function to call if address should be removed
4520 : *
4521 : * Add newly added addresses to the interface, and release
4522 : * addresses that have been deleted.
4523 : */
4524 : static inline int __dev_uc_sync(struct net_device *dev,
4525 : int (*sync)(struct net_device *,
4526 : const unsigned char *),
4527 : int (*unsync)(struct net_device *,
4528 : const unsigned char *))
4529 : {
4530 : return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4531 : }
4532 :
4533 : /**
4534 : * __dev_uc_unsync - Remove synchronized addresses from device
4535 : * @dev: device to sync
4536 : * @unsync: function to call if address should be removed
4537 : *
4538 : * Remove all addresses that were added to the device by dev_uc_sync().
4539 : */
4540 : static inline void __dev_uc_unsync(struct net_device *dev,
4541 : int (*unsync)(struct net_device *,
4542 : const unsigned char *))
4543 : {
4544 : __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4545 : }
4546 :
4547 : /* Functions used for multicast addresses handling */
4548 : int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4549 : int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4550 : int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4551 : int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4552 : int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4553 : int dev_mc_sync(struct net_device *to, struct net_device *from);
4554 : int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4555 : void dev_mc_unsync(struct net_device *to, struct net_device *from);
4556 : void dev_mc_flush(struct net_device *dev);
4557 : void dev_mc_init(struct net_device *dev);
4558 :
4559 : /**
4560 : * __dev_mc_sync - Synchonize device's multicast list
4561 : * @dev: device to sync
4562 : * @sync: function to call if address should be added
4563 : * @unsync: function to call if address should be removed
4564 : *
4565 : * Add newly added addresses to the interface, and release
4566 : * addresses that have been deleted.
4567 : */
4568 : static inline int __dev_mc_sync(struct net_device *dev,
4569 : int (*sync)(struct net_device *,
4570 : const unsigned char *),
4571 : int (*unsync)(struct net_device *,
4572 : const unsigned char *))
4573 : {
4574 : return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4575 : }
4576 :
4577 : /**
4578 : * __dev_mc_unsync - Remove synchronized addresses from device
4579 : * @dev: device to sync
4580 : * @unsync: function to call if address should be removed
4581 : *
4582 : * Remove all addresses that were added to the device by dev_mc_sync().
4583 : */
4584 : static inline void __dev_mc_unsync(struct net_device *dev,
4585 : int (*unsync)(struct net_device *,
4586 : const unsigned char *))
4587 : {
4588 : __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4589 : }
4590 :
4591 : /* Functions used for secondary unicast and multicast support */
4592 : void dev_set_rx_mode(struct net_device *dev);
4593 : void __dev_set_rx_mode(struct net_device *dev);
4594 : int dev_set_promiscuity(struct net_device *dev, int inc);
4595 : int dev_set_allmulti(struct net_device *dev, int inc);
4596 : void netdev_state_change(struct net_device *dev);
4597 : void __netdev_notify_peers(struct net_device *dev);
4598 : void netdev_notify_peers(struct net_device *dev);
4599 : void netdev_features_change(struct net_device *dev);
4600 : /* Load a device via the kmod */
4601 : void dev_load(struct net *net, const char *name);
4602 : struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4603 : struct rtnl_link_stats64 *storage);
4604 : void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4605 : const struct net_device_stats *netdev_stats);
4606 : void dev_fetch_sw_netstats(struct rtnl_link_stats64 *s,
4607 : const struct pcpu_sw_netstats __percpu *netstats);
4608 : void dev_get_tstats64(struct net_device *dev, struct rtnl_link_stats64 *s);
4609 :
4610 : extern int netdev_max_backlog;
4611 : extern int netdev_tstamp_prequeue;
4612 : extern int weight_p;
4613 : extern int dev_weight_rx_bias;
4614 : extern int dev_weight_tx_bias;
4615 : extern int dev_rx_weight;
4616 : extern int dev_tx_weight;
4617 : extern int gro_normal_batch;
4618 :
4619 : enum {
4620 : NESTED_SYNC_IMM_BIT,
4621 : NESTED_SYNC_TODO_BIT,
4622 : };
4623 :
4624 : #define __NESTED_SYNC_BIT(bit) ((u32)1 << (bit))
4625 : #define __NESTED_SYNC(name) __NESTED_SYNC_BIT(NESTED_SYNC_ ## name ## _BIT)
4626 :
4627 : #define NESTED_SYNC_IMM __NESTED_SYNC(IMM)
4628 : #define NESTED_SYNC_TODO __NESTED_SYNC(TODO)
4629 :
4630 : struct netdev_nested_priv {
4631 : unsigned char flags;
4632 : void *data;
4633 : };
4634 :
4635 : bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4636 : struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4637 : struct list_head **iter);
4638 : struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4639 : struct list_head **iter);
4640 :
4641 : #ifdef CONFIG_LOCKDEP
4642 : static LIST_HEAD(net_unlink_list);
4643 :
4644 0 : static inline void net_unlink_todo(struct net_device *dev)
4645 : {
4646 0 : if (list_empty(&dev->unlink_list))
4647 0 : list_add_tail(&dev->unlink_list, &net_unlink_list);
4648 : }
4649 : #endif
4650 :
4651 : /* iterate through upper list, must be called under RCU read lock */
4652 : #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4653 : for (iter = &(dev)->adj_list.upper, \
4654 : updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4655 : updev; \
4656 : updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4657 :
4658 : int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4659 : int (*fn)(struct net_device *upper_dev,
4660 : struct netdev_nested_priv *priv),
4661 : struct netdev_nested_priv *priv);
4662 :
4663 : bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4664 : struct net_device *upper_dev);
4665 :
4666 : bool netdev_has_any_upper_dev(struct net_device *dev);
4667 :
4668 : void *netdev_lower_get_next_private(struct net_device *dev,
4669 : struct list_head **iter);
4670 : void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4671 : struct list_head **iter);
4672 :
4673 : #define netdev_for_each_lower_private(dev, priv, iter) \
4674 : for (iter = (dev)->adj_list.lower.next, \
4675 : priv = netdev_lower_get_next_private(dev, &(iter)); \
4676 : priv; \
4677 : priv = netdev_lower_get_next_private(dev, &(iter)))
4678 :
4679 : #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4680 : for (iter = &(dev)->adj_list.lower, \
4681 : priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4682 : priv; \
4683 : priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4684 :
4685 : void *netdev_lower_get_next(struct net_device *dev,
4686 : struct list_head **iter);
4687 :
4688 : #define netdev_for_each_lower_dev(dev, ldev, iter) \
4689 : for (iter = (dev)->adj_list.lower.next, \
4690 : ldev = netdev_lower_get_next(dev, &(iter)); \
4691 : ldev; \
4692 : ldev = netdev_lower_get_next(dev, &(iter)))
4693 :
4694 : struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
4695 : struct list_head **iter);
4696 : int netdev_walk_all_lower_dev(struct net_device *dev,
4697 : int (*fn)(struct net_device *lower_dev,
4698 : struct netdev_nested_priv *priv),
4699 : struct netdev_nested_priv *priv);
4700 : int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4701 : int (*fn)(struct net_device *lower_dev,
4702 : struct netdev_nested_priv *priv),
4703 : struct netdev_nested_priv *priv);
4704 :
4705 : void *netdev_adjacent_get_private(struct list_head *adj_list);
4706 : void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4707 : struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4708 : struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4709 : int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4710 : struct netlink_ext_ack *extack);
4711 : int netdev_master_upper_dev_link(struct net_device *dev,
4712 : struct net_device *upper_dev,
4713 : void *upper_priv, void *upper_info,
4714 : struct netlink_ext_ack *extack);
4715 : void netdev_upper_dev_unlink(struct net_device *dev,
4716 : struct net_device *upper_dev);
4717 : int netdev_adjacent_change_prepare(struct net_device *old_dev,
4718 : struct net_device *new_dev,
4719 : struct net_device *dev,
4720 : struct netlink_ext_ack *extack);
4721 : void netdev_adjacent_change_commit(struct net_device *old_dev,
4722 : struct net_device *new_dev,
4723 : struct net_device *dev);
4724 : void netdev_adjacent_change_abort(struct net_device *old_dev,
4725 : struct net_device *new_dev,
4726 : struct net_device *dev);
4727 : void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4728 : void *netdev_lower_dev_get_private(struct net_device *dev,
4729 : struct net_device *lower_dev);
4730 : void netdev_lower_state_changed(struct net_device *lower_dev,
4731 : void *lower_state_info);
4732 :
4733 : /* RSS keys are 40 or 52 bytes long */
4734 : #define NETDEV_RSS_KEY_LEN 52
4735 : extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4736 : void netdev_rss_key_fill(void *buffer, size_t len);
4737 :
4738 : int skb_checksum_help(struct sk_buff *skb);
4739 : int skb_crc32c_csum_help(struct sk_buff *skb);
4740 : int skb_csum_hwoffload_help(struct sk_buff *skb,
4741 : const netdev_features_t features);
4742 :
4743 : struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4744 : netdev_features_t features, bool tx_path);
4745 : struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4746 : netdev_features_t features);
4747 :
4748 : struct netdev_bonding_info {
4749 : ifslave slave;
4750 : ifbond master;
4751 : };
4752 :
4753 : struct netdev_notifier_bonding_info {
4754 : struct netdev_notifier_info info; /* must be first */
4755 : struct netdev_bonding_info bonding_info;
4756 : };
4757 :
4758 : void netdev_bonding_info_change(struct net_device *dev,
4759 : struct netdev_bonding_info *bonding_info);
4760 :
4761 : #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4762 : void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4763 : #else
4764 0 : static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4765 : const void *data)
4766 : {
4767 0 : }
4768 : #endif
4769 :
4770 : static inline
4771 0 : struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4772 : {
4773 0 : return __skb_gso_segment(skb, features, true);
4774 : }
4775 : __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4776 :
4777 430 : static inline bool can_checksum_protocol(netdev_features_t features,
4778 : __be16 protocol)
4779 : {
4780 430 : if (protocol == htons(ETH_P_FCOE))
4781 0 : return !!(features & NETIF_F_FCOE_CRC);
4782 :
4783 : /* Assume this is an IP checksum (not SCTP CRC) */
4784 :
4785 430 : if (features & NETIF_F_HW_CSUM) {
4786 : /* Can checksum everything */
4787 : return true;
4788 : }
4789 :
4790 430 : switch (protocol) {
4791 430 : case htons(ETH_P_IP):
4792 430 : return !!(features & NETIF_F_IP_CSUM);
4793 0 : case htons(ETH_P_IPV6):
4794 0 : return !!(features & NETIF_F_IPV6_CSUM);
4795 : default:
4796 : return false;
4797 : }
4798 : }
4799 :
4800 : #ifdef CONFIG_BUG
4801 : void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4802 : #else
4803 : static inline void netdev_rx_csum_fault(struct net_device *dev,
4804 : struct sk_buff *skb)
4805 : {
4806 : }
4807 : #endif
4808 : /* rx skb timestamps */
4809 : void net_enable_timestamp(void);
4810 : void net_disable_timestamp(void);
4811 :
4812 : #ifdef CONFIG_PROC_FS
4813 : int __init dev_proc_init(void);
4814 : #else
4815 : #define dev_proc_init() 0
4816 : #endif
4817 :
4818 448 : static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4819 : struct sk_buff *skb, struct net_device *dev,
4820 : bool more)
4821 : {
4822 448 : __this_cpu_write(softnet_data.xmit.more, more);
4823 448 : return ops->ndo_start_xmit(skb, dev);
4824 : }
4825 :
4826 448 : static inline bool netdev_xmit_more(void)
4827 : {
4828 448 : return __this_cpu_read(softnet_data.xmit.more);
4829 : }
4830 :
4831 448 : static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4832 : struct netdev_queue *txq, bool more)
4833 : {
4834 448 : const struct net_device_ops *ops = dev->netdev_ops;
4835 448 : netdev_tx_t rc;
4836 :
4837 448 : rc = __netdev_start_xmit(ops, skb, dev, more);
4838 448 : if (rc == NETDEV_TX_OK)
4839 448 : txq_trans_update(txq);
4840 :
4841 448 : return rc;
4842 : }
4843 :
4844 : int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4845 : const void *ns);
4846 : void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4847 : const void *ns);
4848 :
4849 : extern const struct kobj_ns_type_operations net_ns_type_operations;
4850 :
4851 : const char *netdev_drivername(const struct net_device *dev);
4852 :
4853 : void linkwatch_run_queue(void);
4854 :
4855 0 : static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4856 : netdev_features_t f2)
4857 : {
4858 0 : if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4859 0 : if (f1 & NETIF_F_HW_CSUM)
4860 0 : f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4861 : else
4862 0 : f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4863 : }
4864 :
4865 0 : return f1 & f2;
4866 : }
4867 :
4868 4 : static inline netdev_features_t netdev_get_wanted_features(
4869 : struct net_device *dev)
4870 : {
4871 4 : return (dev->features & ~dev->hw_features) | dev->wanted_features;
4872 : }
4873 : netdev_features_t netdev_increment_features(netdev_features_t all,
4874 : netdev_features_t one, netdev_features_t mask);
4875 :
4876 : /* Allow TSO being used on stacked device :
4877 : * Performing the GSO segmentation before last device
4878 : * is a performance improvement.
4879 : */
4880 : static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4881 : netdev_features_t mask)
4882 : {
4883 : return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4884 : }
4885 :
4886 : int __netdev_update_features(struct net_device *dev);
4887 : void netdev_update_features(struct net_device *dev);
4888 : void netdev_change_features(struct net_device *dev);
4889 :
4890 : void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4891 : struct net_device *dev);
4892 :
4893 : netdev_features_t passthru_features_check(struct sk_buff *skb,
4894 : struct net_device *dev,
4895 : netdev_features_t features);
4896 : netdev_features_t netif_skb_features(struct sk_buff *skb);
4897 :
4898 8 : static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4899 : {
4900 8 : netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4901 :
4902 : /* check flags correspondence */
4903 8 : BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4904 8 : BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4905 8 : BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4906 8 : BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4907 8 : BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4908 8 : BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4909 8 : BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4910 8 : BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4911 8 : BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4912 8 : BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4913 8 : BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4914 8 : BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4915 8 : BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4916 8 : BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4917 8 : BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4918 8 : BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4919 8 : BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4920 8 : BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4921 8 : BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4922 :
4923 8 : return (features & feature) == feature;
4924 : }
4925 :
4926 0 : static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4927 : {
4928 0 : return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4929 0 : (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4930 : }
4931 :
4932 448 : static inline bool netif_needs_gso(struct sk_buff *skb,
4933 : netdev_features_t features)
4934 : {
4935 448 : return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4936 0 : unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4937 : (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4938 : }
4939 :
4940 0 : static inline void netif_set_gso_max_size(struct net_device *dev,
4941 : unsigned int size)
4942 : {
4943 0 : dev->gso_max_size = size;
4944 0 : }
4945 :
4946 0 : static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4947 : int pulled_hlen, u16 mac_offset,
4948 : int mac_len)
4949 : {
4950 0 : skb->protocol = protocol;
4951 0 : skb->encapsulation = 1;
4952 0 : skb_push(skb, pulled_hlen);
4953 0 : skb_reset_transport_header(skb);
4954 0 : skb->mac_header = mac_offset;
4955 0 : skb->network_header = skb->mac_header + mac_len;
4956 0 : skb->mac_len = mac_len;
4957 : }
4958 :
4959 : static inline bool netif_is_macsec(const struct net_device *dev)
4960 : {
4961 : return dev->priv_flags & IFF_MACSEC;
4962 : }
4963 :
4964 0 : static inline bool netif_is_macvlan(const struct net_device *dev)
4965 : {
4966 0 : return dev->priv_flags & IFF_MACVLAN;
4967 : }
4968 :
4969 : static inline bool netif_is_macvlan_port(const struct net_device *dev)
4970 : {
4971 : return dev->priv_flags & IFF_MACVLAN_PORT;
4972 : }
4973 :
4974 0 : static inline bool netif_is_bond_master(const struct net_device *dev)
4975 : {
4976 0 : return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4977 : }
4978 :
4979 0 : static inline bool netif_is_bond_slave(const struct net_device *dev)
4980 : {
4981 0 : return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4982 : }
4983 :
4984 0 : static inline bool netif_supports_nofcs(struct net_device *dev)
4985 : {
4986 0 : return dev->priv_flags & IFF_SUPP_NOFCS;
4987 : }
4988 :
4989 : static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4990 : {
4991 : return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4992 : }
4993 :
4994 0 : static inline bool netif_is_l3_master(const struct net_device *dev)
4995 : {
4996 0 : return dev->priv_flags & IFF_L3MDEV_MASTER;
4997 : }
4998 :
4999 0 : static inline bool netif_is_l3_slave(const struct net_device *dev)
5000 : {
5001 0 : return dev->priv_flags & IFF_L3MDEV_SLAVE;
5002 : }
5003 :
5004 : static inline bool netif_is_bridge_master(const struct net_device *dev)
5005 : {
5006 : return dev->priv_flags & IFF_EBRIDGE;
5007 : }
5008 :
5009 0 : static inline bool netif_is_bridge_port(const struct net_device *dev)
5010 : {
5011 0 : return dev->priv_flags & IFF_BRIDGE_PORT;
5012 : }
5013 :
5014 : static inline bool netif_is_ovs_master(const struct net_device *dev)
5015 : {
5016 : return dev->priv_flags & IFF_OPENVSWITCH;
5017 : }
5018 :
5019 0 : static inline bool netif_is_ovs_port(const struct net_device *dev)
5020 : {
5021 0 : return dev->priv_flags & IFF_OVS_DATAPATH;
5022 : }
5023 :
5024 0 : static inline bool netif_is_any_bridge_port(const struct net_device *dev)
5025 : {
5026 0 : return netif_is_bridge_port(dev) || netif_is_ovs_port(dev);
5027 : }
5028 :
5029 0 : static inline bool netif_is_team_master(const struct net_device *dev)
5030 : {
5031 0 : return dev->priv_flags & IFF_TEAM;
5032 : }
5033 :
5034 0 : static inline bool netif_is_team_port(const struct net_device *dev)
5035 : {
5036 0 : return dev->priv_flags & IFF_TEAM_PORT;
5037 : }
5038 :
5039 0 : static inline bool netif_is_lag_master(const struct net_device *dev)
5040 : {
5041 0 : return netif_is_bond_master(dev) || netif_is_team_master(dev);
5042 : }
5043 :
5044 0 : static inline bool netif_is_lag_port(const struct net_device *dev)
5045 : {
5046 0 : return netif_is_bond_slave(dev) || netif_is_team_port(dev);
5047 : }
5048 :
5049 0 : static inline bool netif_is_rxfh_configured(const struct net_device *dev)
5050 : {
5051 0 : return dev->priv_flags & IFF_RXFH_CONFIGURED;
5052 : }
5053 :
5054 6 : static inline bool netif_is_failover(const struct net_device *dev)
5055 : {
5056 6 : return dev->priv_flags & IFF_FAILOVER;
5057 : }
5058 :
5059 2 : static inline bool netif_is_failover_slave(const struct net_device *dev)
5060 : {
5061 2 : return dev->priv_flags & IFF_FAILOVER_SLAVE;
5062 : }
5063 :
5064 : /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
5065 2 : static inline void netif_keep_dst(struct net_device *dev)
5066 : {
5067 2 : dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
5068 : }
5069 :
5070 : /* return true if dev can't cope with mtu frames that need vlan tag insertion */
5071 : static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
5072 : {
5073 : /* TODO: reserve and use an additional IFF bit, if we get more users */
5074 : return dev->priv_flags & IFF_MACSEC;
5075 : }
5076 :
5077 : extern struct pernet_operations __net_initdata loopback_net_ops;
5078 :
5079 : /* Logging, debugging and troubleshooting/diagnostic helpers. */
5080 :
5081 : /* netdev_printk helpers, similar to dev_printk */
5082 :
5083 0 : static inline const char *netdev_name(const struct net_device *dev)
5084 : {
5085 0 : if (!dev->name[0] || strchr(dev->name, '%'))
5086 0 : return "(unnamed net_device)";
5087 : return dev->name;
5088 : }
5089 :
5090 : static inline bool netdev_unregistering(const struct net_device *dev)
5091 : {
5092 : return dev->reg_state == NETREG_UNREGISTERING;
5093 : }
5094 :
5095 0 : static inline const char *netdev_reg_state(const struct net_device *dev)
5096 : {
5097 0 : switch (dev->reg_state) {
5098 : case NETREG_UNINITIALIZED: return " (uninitialized)";
5099 : case NETREG_REGISTERED: return "";
5100 : case NETREG_UNREGISTERING: return " (unregistering)";
5101 : case NETREG_UNREGISTERED: return " (unregistered)";
5102 : case NETREG_RELEASED: return " (released)";
5103 : case NETREG_DUMMY: return " (dummy)";
5104 : }
5105 :
5106 0 : WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
5107 : return " (unknown)";
5108 : }
5109 :
5110 : __printf(3, 4) __cold
5111 : void netdev_printk(const char *level, const struct net_device *dev,
5112 : const char *format, ...);
5113 : __printf(2, 3) __cold
5114 : void netdev_emerg(const struct net_device *dev, const char *format, ...);
5115 : __printf(2, 3) __cold
5116 : void netdev_alert(const struct net_device *dev, const char *format, ...);
5117 : __printf(2, 3) __cold
5118 : void netdev_crit(const struct net_device *dev, const char *format, ...);
5119 : __printf(2, 3) __cold
5120 : void netdev_err(const struct net_device *dev, const char *format, ...);
5121 : __printf(2, 3) __cold
5122 : void netdev_warn(const struct net_device *dev, const char *format, ...);
5123 : __printf(2, 3) __cold
5124 : void netdev_notice(const struct net_device *dev, const char *format, ...);
5125 : __printf(2, 3) __cold
5126 : void netdev_info(const struct net_device *dev, const char *format, ...);
5127 :
5128 : #define netdev_level_once(level, dev, fmt, ...) \
5129 : do { \
5130 : static bool __print_once __read_mostly; \
5131 : \
5132 : if (!__print_once) { \
5133 : __print_once = true; \
5134 : netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
5135 : } \
5136 : } while (0)
5137 :
5138 : #define netdev_emerg_once(dev, fmt, ...) \
5139 : netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
5140 : #define netdev_alert_once(dev, fmt, ...) \
5141 : netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
5142 : #define netdev_crit_once(dev, fmt, ...) \
5143 : netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
5144 : #define netdev_err_once(dev, fmt, ...) \
5145 : netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
5146 : #define netdev_warn_once(dev, fmt, ...) \
5147 : netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
5148 : #define netdev_notice_once(dev, fmt, ...) \
5149 : netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
5150 : #define netdev_info_once(dev, fmt, ...) \
5151 : netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
5152 :
5153 : #define MODULE_ALIAS_NETDEV(device) \
5154 : MODULE_ALIAS("netdev-" device)
5155 :
5156 : #if defined(CONFIG_DYNAMIC_DEBUG) || \
5157 : (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5158 : #define netdev_dbg(__dev, format, args...) \
5159 : do { \
5160 : dynamic_netdev_dbg(__dev, format, ##args); \
5161 : } while (0)
5162 : #elif defined(DEBUG)
5163 : #define netdev_dbg(__dev, format, args...) \
5164 : netdev_printk(KERN_DEBUG, __dev, format, ##args)
5165 : #else
5166 : #define netdev_dbg(__dev, format, args...) \
5167 : ({ \
5168 : if (0) \
5169 : netdev_printk(KERN_DEBUG, __dev, format, ##args); \
5170 : })
5171 : #endif
5172 :
5173 : #if defined(VERBOSE_DEBUG)
5174 : #define netdev_vdbg netdev_dbg
5175 : #else
5176 :
5177 : #define netdev_vdbg(dev, format, args...) \
5178 : ({ \
5179 : if (0) \
5180 : netdev_printk(KERN_DEBUG, dev, format, ##args); \
5181 : 0; \
5182 : })
5183 : #endif
5184 :
5185 : /*
5186 : * netdev_WARN() acts like dev_printk(), but with the key difference
5187 : * of using a WARN/WARN_ON to get the message out, including the
5188 : * file/line information and a backtrace.
5189 : */
5190 : #define netdev_WARN(dev, format, args...) \
5191 : WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
5192 : netdev_reg_state(dev), ##args)
5193 :
5194 : #define netdev_WARN_ONCE(dev, format, args...) \
5195 : WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
5196 : netdev_reg_state(dev), ##args)
5197 :
5198 : /* netif printk helpers, similar to netdev_printk */
5199 :
5200 : #define netif_printk(priv, type, level, dev, fmt, args...) \
5201 : do { \
5202 : if (netif_msg_##type(priv)) \
5203 : netdev_printk(level, (dev), fmt, ##args); \
5204 : } while (0)
5205 :
5206 : #define netif_level(level, priv, type, dev, fmt, args...) \
5207 : do { \
5208 : if (netif_msg_##type(priv)) \
5209 : netdev_##level(dev, fmt, ##args); \
5210 : } while (0)
5211 :
5212 : #define netif_emerg(priv, type, dev, fmt, args...) \
5213 : netif_level(emerg, priv, type, dev, fmt, ##args)
5214 : #define netif_alert(priv, type, dev, fmt, args...) \
5215 : netif_level(alert, priv, type, dev, fmt, ##args)
5216 : #define netif_crit(priv, type, dev, fmt, args...) \
5217 : netif_level(crit, priv, type, dev, fmt, ##args)
5218 : #define netif_err(priv, type, dev, fmt, args...) \
5219 : netif_level(err, priv, type, dev, fmt, ##args)
5220 : #define netif_warn(priv, type, dev, fmt, args...) \
5221 : netif_level(warn, priv, type, dev, fmt, ##args)
5222 : #define netif_notice(priv, type, dev, fmt, args...) \
5223 : netif_level(notice, priv, type, dev, fmt, ##args)
5224 : #define netif_info(priv, type, dev, fmt, args...) \
5225 : netif_level(info, priv, type, dev, fmt, ##args)
5226 :
5227 : #if defined(CONFIG_DYNAMIC_DEBUG) || \
5228 : (defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
5229 : #define netif_dbg(priv, type, netdev, format, args...) \
5230 : do { \
5231 : if (netif_msg_##type(priv)) \
5232 : dynamic_netdev_dbg(netdev, format, ##args); \
5233 : } while (0)
5234 : #elif defined(DEBUG)
5235 : #define netif_dbg(priv, type, dev, format, args...) \
5236 : netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
5237 : #else
5238 : #define netif_dbg(priv, type, dev, format, args...) \
5239 : ({ \
5240 : if (0) \
5241 : netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5242 : 0; \
5243 : })
5244 : #endif
5245 :
5246 : /* if @cond then downgrade to debug, else print at @level */
5247 : #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
5248 : do { \
5249 : if (cond) \
5250 : netif_dbg(priv, type, netdev, fmt, ##args); \
5251 : else \
5252 : netif_ ## level(priv, type, netdev, fmt, ##args); \
5253 : } while (0)
5254 :
5255 : #if defined(VERBOSE_DEBUG)
5256 : #define netif_vdbg netif_dbg
5257 : #else
5258 : #define netif_vdbg(priv, type, dev, format, args...) \
5259 : ({ \
5260 : if (0) \
5261 : netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
5262 : 0; \
5263 : })
5264 : #endif
5265 :
5266 : /*
5267 : * The list of packet types we will receive (as opposed to discard)
5268 : * and the routines to invoke.
5269 : *
5270 : * Why 16. Because with 16 the only overlap we get on a hash of the
5271 : * low nibble of the protocol value is RARP/SNAP/X.25.
5272 : *
5273 : * 0800 IP
5274 : * 0001 802.3
5275 : * 0002 AX.25
5276 : * 0004 802.2
5277 : * 8035 RARP
5278 : * 0005 SNAP
5279 : * 0805 X.25
5280 : * 0806 ARP
5281 : * 8137 IPX
5282 : * 0009 Localtalk
5283 : * 86DD IPv6
5284 : */
5285 : #define PTYPE_HASH_SIZE (16)
5286 : #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
5287 :
5288 : extern struct net_device *blackhole_netdev;
5289 :
5290 : #endif /* _LINUX_NETDEVICE_H */
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