1 /* SPDX-License-Identifier: GPL-2.0-or-later */
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.
7 * Definitions for the Interfaces handler.
9 * Version: @(#)dev.h 1.0.10 08/12/93
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>
19 * Moved to /usr/include/linux for NET3
21 #ifndef _LINUX_NETDEVICE_H
22 #define _LINUX_NETDEVICE_H
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>
32 #include <linux/percpu.h>
33 #include <linux/rculist.h>
34 #include <linux/workqueue.h>
35 #include <linux/dynamic_queue_limits.h>
37 #include <linux/ethtool.h>
38 #include <net/net_namespace.h>
40 #include <net/dcbnl.h>
42 #include <net/netprio_cgroup.h>
45 #include <linux/netdev_features.h>
46 #include <linux/neighbour.h>
47 #include <uapi/linux/netdevice.h>
48 #include <uapi/linux/if_bonding.h>
49 #include <uapi/linux/pkt_cls.h>
50 #include <linux/hashtable.h>
60 /* 802.15.4 specific */
63 /* UDP Tunnel offloads */
64 struct udp_tunnel_info;
68 void netdev_set_default_ethtool_ops(struct net_device *dev,
69 const struct ethtool_ops *ops);
71 /* Backlog congestion levels */
72 #define NET_RX_SUCCESS 0 /* keep 'em coming, baby */
73 #define NET_RX_DROP 1 /* packet dropped */
75 #define MAX_NEST_DEV 8
78 * Transmit return codes: transmit return codes originate from three different
81 * - qdisc return codes
82 * - driver transmit return codes
85 * Drivers are allowed to return any one of those in their hard_start_xmit()
86 * function. Real network devices commonly used with qdiscs should only return
87 * the driver transmit return codes though - when qdiscs are used, the actual
88 * transmission happens asynchronously, so the value is not propagated to
89 * higher layers. Virtual network devices transmit synchronously; in this case
90 * the driver transmit return codes are consumed by dev_queue_xmit(), and all
91 * others are propagated to higher layers.
94 /* qdisc ->enqueue() return codes. */
95 #define NET_XMIT_SUCCESS 0x00
96 #define NET_XMIT_DROP 0x01 /* skb dropped */
97 #define NET_XMIT_CN 0x02 /* congestion notification */
98 #define NET_XMIT_MASK 0x0f /* qdisc flags in net/sch_generic.h */
100 /* NET_XMIT_CN is special. It does not guarantee that this packet is lost. It
101 * indicates that the device will soon be dropping packets, or already drops
102 * some packets of the same priority; prompting us to send less aggressively. */
103 #define net_xmit_eval(e) ((e) == NET_XMIT_CN ? 0 : (e))
104 #define net_xmit_errno(e) ((e) != NET_XMIT_CN ? -ENOBUFS : 0)
106 /* Driver transmit return codes */
107 #define NETDEV_TX_MASK 0xf0
110 __NETDEV_TX_MIN = INT_MIN, /* make sure enum is signed */
111 NETDEV_TX_OK = 0x00, /* driver took care of packet */
112 NETDEV_TX_BUSY = 0x10, /* driver tx path was busy*/
114 typedef enum netdev_tx netdev_tx_t;
117 * Current order: NETDEV_TX_MASK > NET_XMIT_MASK >= 0 is significant;
118 * hard_start_xmit() return < NET_XMIT_MASK means skb was consumed.
120 static inline bool dev_xmit_complete(int rc)
123 * Positive cases with an skb consumed by a driver:
124 * - successful transmission (rc == NETDEV_TX_OK)
125 * - error while transmitting (rc < 0)
126 * - error while queueing to a different device (rc & NET_XMIT_MASK)
128 if (likely(rc < NET_XMIT_MASK))
135 * Compute the worst-case header length according to the protocols
139 #if defined(CONFIG_HYPERV_NET)
140 # define LL_MAX_HEADER 128
141 #elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
142 # if defined(CONFIG_MAC80211_MESH)
143 # define LL_MAX_HEADER 128
145 # define LL_MAX_HEADER 96
148 # define LL_MAX_HEADER 32
151 #if !IS_ENABLED(CONFIG_NET_IPIP) && !IS_ENABLED(CONFIG_NET_IPGRE) && \
152 !IS_ENABLED(CONFIG_IPV6_SIT) && !IS_ENABLED(CONFIG_IPV6_TUNNEL)
153 #define MAX_HEADER LL_MAX_HEADER
155 #define MAX_HEADER (LL_MAX_HEADER + 48)
159 * Old network device statistics. Fields are native words
160 * (unsigned long) so they can be read and written atomically.
163 struct net_device_stats {
164 unsigned long rx_packets;
165 unsigned long tx_packets;
166 unsigned long rx_bytes;
167 unsigned long tx_bytes;
168 unsigned long rx_errors;
169 unsigned long tx_errors;
170 unsigned long rx_dropped;
171 unsigned long tx_dropped;
172 unsigned long multicast;
173 unsigned long collisions;
174 unsigned long rx_length_errors;
175 unsigned long rx_over_errors;
176 unsigned long rx_crc_errors;
177 unsigned long rx_frame_errors;
178 unsigned long rx_fifo_errors;
179 unsigned long rx_missed_errors;
180 unsigned long tx_aborted_errors;
181 unsigned long tx_carrier_errors;
182 unsigned long tx_fifo_errors;
183 unsigned long tx_heartbeat_errors;
184 unsigned long tx_window_errors;
185 unsigned long rx_compressed;
186 unsigned long tx_compressed;
190 #include <linux/cache.h>
191 #include <linux/skbuff.h>
194 #include <linux/static_key.h>
195 extern struct static_key_false rps_needed;
196 extern struct static_key_false rfs_needed;
203 struct netdev_hw_addr {
204 struct list_head list;
205 unsigned char addr[MAX_ADDR_LEN];
207 #define NETDEV_HW_ADDR_T_LAN 1
208 #define NETDEV_HW_ADDR_T_SAN 2
209 #define NETDEV_HW_ADDR_T_SLAVE 3
210 #define NETDEV_HW_ADDR_T_UNICAST 4
211 #define NETDEV_HW_ADDR_T_MULTICAST 5
216 struct rcu_head rcu_head;
219 struct netdev_hw_addr_list {
220 struct list_head list;
224 #define netdev_hw_addr_list_count(l) ((l)->count)
225 #define netdev_hw_addr_list_empty(l) (netdev_hw_addr_list_count(l) == 0)
226 #define netdev_hw_addr_list_for_each(ha, l) \
227 list_for_each_entry(ha, &(l)->list, list)
229 #define netdev_uc_count(dev) netdev_hw_addr_list_count(&(dev)->uc)
230 #define netdev_uc_empty(dev) netdev_hw_addr_list_empty(&(dev)->uc)
231 #define netdev_for_each_uc_addr(ha, dev) \
232 netdev_hw_addr_list_for_each(ha, &(dev)->uc)
234 #define netdev_mc_count(dev) netdev_hw_addr_list_count(&(dev)->mc)
235 #define netdev_mc_empty(dev) netdev_hw_addr_list_empty(&(dev)->mc)
236 #define netdev_for_each_mc_addr(ha, dev) \
237 netdev_hw_addr_list_for_each(ha, &(dev)->mc)
243 /* cached hardware header; allow for machine alignment needs. */
244 #define HH_DATA_MOD 16
245 #define HH_DATA_OFF(__len) \
246 (HH_DATA_MOD - (((__len - 1) & (HH_DATA_MOD - 1)) + 1))
247 #define HH_DATA_ALIGN(__len) \
248 (((__len)+(HH_DATA_MOD-1))&~(HH_DATA_MOD - 1))
249 unsigned long hh_data[HH_DATA_ALIGN(LL_MAX_HEADER) / sizeof(long)];
252 /* Reserve HH_DATA_MOD byte-aligned hard_header_len, but at least that much.
254 * dev->hard_header_len ? (dev->hard_header_len +
255 * (HH_DATA_MOD - 1)) & ~(HH_DATA_MOD - 1) : 0
257 * We could use other alignment values, but we must maintain the
258 * relationship HH alignment <= LL alignment.
260 #define LL_RESERVED_SPACE(dev) \
261 ((((dev)->hard_header_len+(dev)->needed_headroom)&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
262 #define LL_RESERVED_SPACE_EXTRA(dev,extra) \
263 ((((dev)->hard_header_len+(dev)->needed_headroom+(extra))&~(HH_DATA_MOD - 1)) + HH_DATA_MOD)
266 int (*create) (struct sk_buff *skb, struct net_device *dev,
267 unsigned short type, const void *daddr,
268 const void *saddr, unsigned int len);
269 int (*parse)(const struct sk_buff *skb, unsigned char *haddr);
270 int (*cache)(const struct neighbour *neigh, struct hh_cache *hh, __be16 type);
271 void (*cache_update)(struct hh_cache *hh,
272 const struct net_device *dev,
273 const unsigned char *haddr);
274 bool (*validate)(const char *ll_header, unsigned int len);
275 __be16 (*parse_protocol)(const struct sk_buff *skb);
278 /* These flag bits are private to the generic network queueing
279 * layer; they may not be explicitly referenced by any other
283 enum netdev_state_t {
285 __LINK_STATE_PRESENT,
286 __LINK_STATE_NOCARRIER,
287 __LINK_STATE_LINKWATCH_PENDING,
288 __LINK_STATE_DORMANT,
293 * This structure holds boot-time configured netdevice settings. They
294 * are then used in the device probing.
296 struct netdev_boot_setup {
300 #define NETDEV_BOOT_SETUP_MAX 8
302 int __init netdev_boot_setup(char *str);
305 struct list_head list;
310 * size of gro hash buckets, must less than bit number of
311 * napi_struct::gro_bitmask
313 #define GRO_HASH_BUCKETS 8
316 * Structure for NAPI scheduling similar to tasklet but with weighting
319 /* The poll_list must only be managed by the entity which
320 * changes the state of the NAPI_STATE_SCHED bit. This means
321 * whoever atomically sets that bit can add this napi_struct
322 * to the per-CPU poll_list, and whoever clears that bit
323 * can remove from the list right before clearing the bit.
325 struct list_head poll_list;
329 unsigned long gro_bitmask;
330 int (*poll)(struct napi_struct *, int);
331 #ifdef CONFIG_NETPOLL
334 struct net_device *dev;
335 struct gro_list gro_hash[GRO_HASH_BUCKETS];
337 struct list_head rx_list; /* Pending GRO_NORMAL skbs */
338 int rx_count; /* length of rx_list */
339 struct hrtimer timer;
340 struct list_head dev_list;
341 struct hlist_node napi_hash_node;
342 unsigned int napi_id;
346 NAPI_STATE_SCHED, /* Poll is scheduled */
347 NAPI_STATE_MISSED, /* reschedule a napi */
348 NAPI_STATE_DISABLE, /* Disable pending */
349 NAPI_STATE_NPSVC, /* Netpoll - don't dequeue from poll_list */
350 NAPI_STATE_HASHED, /* In NAPI hash (busy polling possible) */
351 NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
352 NAPI_STATE_IN_BUSY_POLL,/* sk_busy_loop() owns this NAPI */
356 NAPIF_STATE_SCHED = BIT(NAPI_STATE_SCHED),
357 NAPIF_STATE_MISSED = BIT(NAPI_STATE_MISSED),
358 NAPIF_STATE_DISABLE = BIT(NAPI_STATE_DISABLE),
359 NAPIF_STATE_NPSVC = BIT(NAPI_STATE_NPSVC),
360 NAPIF_STATE_HASHED = BIT(NAPI_STATE_HASHED),
361 NAPIF_STATE_NO_BUSY_POLL = BIT(NAPI_STATE_NO_BUSY_POLL),
362 NAPIF_STATE_IN_BUSY_POLL = BIT(NAPI_STATE_IN_BUSY_POLL),
373 typedef enum gro_result gro_result_t;
376 * enum rx_handler_result - Possible return values for rx_handlers.
377 * @RX_HANDLER_CONSUMED: skb was consumed by rx_handler, do not process it
379 * @RX_HANDLER_ANOTHER: Do another round in receive path. This is indicated in
380 * case skb->dev was changed by rx_handler.
381 * @RX_HANDLER_EXACT: Force exact delivery, no wildcard.
382 * @RX_HANDLER_PASS: Do nothing, pass the skb as if no rx_handler was called.
384 * rx_handlers are functions called from inside __netif_receive_skb(), to do
385 * special processing of the skb, prior to delivery to protocol handlers.
387 * Currently, a net_device can only have a single rx_handler registered. Trying
388 * to register a second rx_handler will return -EBUSY.
390 * To register a rx_handler on a net_device, use netdev_rx_handler_register().
391 * To unregister a rx_handler on a net_device, use
392 * netdev_rx_handler_unregister().
394 * Upon return, rx_handler is expected to tell __netif_receive_skb() what to
397 * If the rx_handler consumed the skb in some way, it should return
398 * RX_HANDLER_CONSUMED. This is appropriate when the rx_handler arranged for
399 * the skb to be delivered in some other way.
401 * If the rx_handler changed skb->dev, to divert the skb to another
402 * net_device, it should return RX_HANDLER_ANOTHER. The rx_handler for the
403 * new device will be called if it exists.
405 * If the rx_handler decides the skb should be ignored, it should return
406 * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
407 * are registered on exact device (ptype->dev == skb->dev).
409 * If the rx_handler didn't change skb->dev, but wants the skb to be normally
410 * delivered, it should return RX_HANDLER_PASS.
412 * A device without a registered rx_handler will behave as if rx_handler
413 * returned RX_HANDLER_PASS.
416 enum rx_handler_result {
422 typedef enum rx_handler_result rx_handler_result_t;
423 typedef rx_handler_result_t rx_handler_func_t(struct sk_buff **pskb);
425 void __napi_schedule(struct napi_struct *n);
426 void __napi_schedule_irqoff(struct napi_struct *n);
428 static inline bool napi_disable_pending(struct napi_struct *n)
430 return test_bit(NAPI_STATE_DISABLE, &n->state);
433 bool napi_schedule_prep(struct napi_struct *n);
436 * napi_schedule - schedule NAPI poll
439 * Schedule NAPI poll routine to be called if it is not already
442 static inline void napi_schedule(struct napi_struct *n)
444 if (napi_schedule_prep(n))
449 * napi_schedule_irqoff - schedule NAPI poll
452 * Variant of napi_schedule(), assuming hard irqs are masked.
454 static inline void napi_schedule_irqoff(struct napi_struct *n)
456 if (napi_schedule_prep(n))
457 __napi_schedule_irqoff(n);
460 /* Try to reschedule poll. Called by dev->poll() after napi_complete(). */
461 static inline bool napi_reschedule(struct napi_struct *napi)
463 if (napi_schedule_prep(napi)) {
464 __napi_schedule(napi);
470 bool napi_complete_done(struct napi_struct *n, int work_done);
472 * napi_complete - NAPI processing complete
475 * Mark NAPI processing as complete.
476 * Consider using napi_complete_done() instead.
477 * Return false if device should avoid rearming interrupts.
479 static inline bool napi_complete(struct napi_struct *n)
481 return napi_complete_done(n, 0);
485 * napi_hash_del - remove a NAPI from global table
486 * @napi: NAPI context
488 * Warning: caller must observe RCU grace period
489 * before freeing memory containing @napi, if
490 * this function returns true.
491 * Note: core networking stack automatically calls it
492 * from netif_napi_del().
493 * Drivers might want to call this helper to combine all
494 * the needed RCU grace periods into a single one.
496 bool napi_hash_del(struct napi_struct *napi);
499 * napi_disable - prevent NAPI from scheduling
502 * Stop NAPI from being scheduled on this context.
503 * Waits till any outstanding processing completes.
505 void napi_disable(struct napi_struct *n);
508 * napi_enable - enable NAPI scheduling
511 * Resume NAPI from being scheduled on this context.
512 * Must be paired with napi_disable.
514 static inline void napi_enable(struct napi_struct *n)
516 BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state));
517 smp_mb__before_atomic();
518 clear_bit(NAPI_STATE_SCHED, &n->state);
519 clear_bit(NAPI_STATE_NPSVC, &n->state);
523 * napi_synchronize - wait until NAPI is not running
526 * Wait until NAPI is done being scheduled on this context.
527 * Waits till any outstanding processing completes but
528 * does not disable future activations.
530 static inline void napi_synchronize(const struct napi_struct *n)
532 if (IS_ENABLED(CONFIG_SMP))
533 while (test_bit(NAPI_STATE_SCHED, &n->state))
540 * napi_if_scheduled_mark_missed - if napi is running, set the
544 * If napi is running, set the NAPIF_STATE_MISSED, and return true if
547 static inline bool napi_if_scheduled_mark_missed(struct napi_struct *n)
549 unsigned long val, new;
552 val = READ_ONCE(n->state);
553 if (val & NAPIF_STATE_DISABLE)
556 if (!(val & NAPIF_STATE_SCHED))
559 new = val | NAPIF_STATE_MISSED;
560 } while (cmpxchg(&n->state, val, new) != val);
565 enum netdev_queue_state_t {
566 __QUEUE_STATE_DRV_XOFF,
567 __QUEUE_STATE_STACK_XOFF,
568 __QUEUE_STATE_FROZEN,
571 #define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
572 #define QUEUE_STATE_STACK_XOFF (1 << __QUEUE_STATE_STACK_XOFF)
573 #define QUEUE_STATE_FROZEN (1 << __QUEUE_STATE_FROZEN)
575 #define QUEUE_STATE_ANY_XOFF (QUEUE_STATE_DRV_XOFF | QUEUE_STATE_STACK_XOFF)
576 #define QUEUE_STATE_ANY_XOFF_OR_FROZEN (QUEUE_STATE_ANY_XOFF | \
578 #define QUEUE_STATE_DRV_XOFF_OR_FROZEN (QUEUE_STATE_DRV_XOFF | \
582 * __QUEUE_STATE_DRV_XOFF is used by drivers to stop the transmit queue. The
583 * netif_tx_* functions below are used to manipulate this flag. The
584 * __QUEUE_STATE_STACK_XOFF flag is used by the stack to stop the transmit
585 * queue independently. The netif_xmit_*stopped functions below are called
586 * to check if the queue has been stopped by the driver or stack (either
587 * of the XOFF bits are set in the state). Drivers should not need to call
588 * netif_xmit*stopped functions, they should only be using netif_tx_*.
591 struct netdev_queue {
595 struct net_device *dev;
596 struct Qdisc __rcu *qdisc;
597 struct Qdisc *qdisc_sleeping;
601 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
604 unsigned long tx_maxrate;
606 * Number of TX timeouts for this queue
607 * (/sys/class/net/DEV/Q/trans_timeout)
609 unsigned long trans_timeout;
611 /* Subordinate device that the queue has been assigned to */
612 struct net_device *sb_dev;
613 #ifdef CONFIG_XDP_SOCKETS
614 struct xdp_umem *umem;
619 spinlock_t _xmit_lock ____cacheline_aligned_in_smp;
622 * Time (in jiffies) of last Tx
624 unsigned long trans_start;
631 } ____cacheline_aligned_in_smp;
633 extern int sysctl_fb_tunnels_only_for_init_net;
634 extern int sysctl_devconf_inherit_init_net;
636 static inline bool net_has_fallback_tunnels(const struct net *net)
638 return net == &init_net ||
639 !IS_ENABLED(CONFIG_SYSCTL) ||
640 !sysctl_fb_tunnels_only_for_init_net;
643 static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
645 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
652 static inline void netdev_queue_numa_node_write(struct netdev_queue *q, int node)
654 #if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
661 * This structure holds an RPS map which can be of variable length. The
662 * map is an array of CPUs.
669 #define RPS_MAP_SIZE(_num) (sizeof(struct rps_map) + ((_num) * sizeof(u16)))
672 * The rps_dev_flow structure contains the mapping of a flow to a CPU, the
673 * tail pointer for that CPU's input queue at the time of last enqueue, and
674 * a hardware filter index.
676 struct rps_dev_flow {
679 unsigned int last_qtail;
681 #define RPS_NO_FILTER 0xffff
684 * The rps_dev_flow_table structure contains a table of flow mappings.
686 struct rps_dev_flow_table {
689 struct rps_dev_flow flows[0];
691 #define RPS_DEV_FLOW_TABLE_SIZE(_num) (sizeof(struct rps_dev_flow_table) + \
692 ((_num) * sizeof(struct rps_dev_flow)))
695 * The rps_sock_flow_table contains mappings of flows to the last CPU
696 * on which they were processed by the application (set in recvmsg).
697 * Each entry is a 32bit value. Upper part is the high-order bits
698 * of flow hash, lower part is CPU number.
699 * rps_cpu_mask is used to partition the space, depending on number of
700 * possible CPUs : rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1
701 * For example, if 64 CPUs are possible, rps_cpu_mask = 0x3f,
702 * meaning we use 32-6=26 bits for the hash.
704 struct rps_sock_flow_table {
707 u32 ents[0] ____cacheline_aligned_in_smp;
709 #define RPS_SOCK_FLOW_TABLE_SIZE(_num) (offsetof(struct rps_sock_flow_table, ents[_num]))
711 #define RPS_NO_CPU 0xffff
713 extern u32 rps_cpu_mask;
714 extern struct rps_sock_flow_table __rcu *rps_sock_flow_table;
716 static inline void rps_record_sock_flow(struct rps_sock_flow_table *table,
720 unsigned int index = hash & table->mask;
721 u32 val = hash & ~rps_cpu_mask;
723 /* We only give a hint, preemption can change CPU under us */
724 val |= raw_smp_processor_id();
726 if (table->ents[index] != val)
727 table->ents[index] = val;
731 #ifdef CONFIG_RFS_ACCEL
732 bool rps_may_expire_flow(struct net_device *dev, u16 rxq_index, u32 flow_id,
735 #endif /* CONFIG_RPS */
737 /* This structure contains an instance of an RX queue. */
738 struct netdev_rx_queue {
740 struct rps_map __rcu *rps_map;
741 struct rps_dev_flow_table __rcu *rps_flow_table;
744 struct net_device *dev;
745 struct xdp_rxq_info xdp_rxq;
746 #ifdef CONFIG_XDP_SOCKETS
747 struct xdp_umem *umem;
749 } ____cacheline_aligned_in_smp;
752 * RX queue sysfs structures and functions.
754 struct rx_queue_attribute {
755 struct attribute attr;
756 ssize_t (*show)(struct netdev_rx_queue *queue, char *buf);
757 ssize_t (*store)(struct netdev_rx_queue *queue,
758 const char *buf, size_t len);
763 * This structure holds an XPS map which can be of variable length. The
764 * map is an array of queues.
768 unsigned int alloc_len;
772 #define XPS_MAP_SIZE(_num) (sizeof(struct xps_map) + ((_num) * sizeof(u16)))
773 #define XPS_MIN_MAP_ALLOC ((L1_CACHE_ALIGN(offsetof(struct xps_map, queues[1])) \
774 - sizeof(struct xps_map)) / sizeof(u16))
777 * This structure holds all XPS maps for device. Maps are indexed by CPU.
779 struct xps_dev_maps {
781 struct xps_map __rcu *attr_map[0]; /* Either CPUs map or RXQs map */
784 #define XPS_CPU_DEV_MAPS_SIZE(_tcs) (sizeof(struct xps_dev_maps) + \
785 (nr_cpu_ids * (_tcs) * sizeof(struct xps_map *)))
787 #define XPS_RXQ_DEV_MAPS_SIZE(_tcs, _rxqs) (sizeof(struct xps_dev_maps) +\
788 (_rxqs * (_tcs) * sizeof(struct xps_map *)))
790 #endif /* CONFIG_XPS */
792 #define TC_MAX_QUEUE 16
793 #define TC_BITMASK 15
794 /* HW offloaded queuing disciplines txq count and offset maps */
795 struct netdev_tc_txq {
800 #if defined(CONFIG_FCOE) || defined(CONFIG_FCOE_MODULE)
802 * This structure is to hold information about the device
803 * configured to run FCoE protocol stack.
805 struct netdev_fcoe_hbainfo {
806 char manufacturer[64];
807 char serial_number[64];
808 char hardware_version[64];
809 char driver_version[64];
810 char optionrom_version[64];
811 char firmware_version[64];
813 char model_description[256];
817 #define MAX_PHYS_ITEM_ID_LEN 32
819 /* This structure holds a unique identifier to identify some
820 * physical item (port for example) used by a netdevice.
822 struct netdev_phys_item_id {
823 unsigned char id[MAX_PHYS_ITEM_ID_LEN];
824 unsigned char id_len;
827 static inline bool netdev_phys_item_id_same(struct netdev_phys_item_id *a,
828 struct netdev_phys_item_id *b)
830 return a->id_len == b->id_len &&
831 memcmp(a->id, b->id, a->id_len) == 0;
834 typedef u16 (*select_queue_fallback_t)(struct net_device *dev,
836 struct net_device *sb_dev);
839 TC_SETUP_QDISC_MQPRIO,
842 TC_SETUP_CLSMATCHALL,
852 TC_SETUP_QDISC_TAPRIO,
858 /* These structures hold the attributes of bpf state that are being passed
859 * to the netdevice through the bpf op.
861 enum bpf_netdev_command {
862 /* Set or clear a bpf program used in the earliest stages of packet
863 * rx. The prog will have been loaded as BPF_PROG_TYPE_XDP. The callee
864 * is responsible for calling bpf_prog_put on any old progs that are
865 * stored. In case of error, the callee need not release the new prog
866 * reference, but on success it takes ownership and must bpf_prog_put
867 * when it is no longer used.
873 /* BPF program for offload callbacks, invoked at program load time. */
874 BPF_OFFLOAD_MAP_ALLOC,
875 BPF_OFFLOAD_MAP_FREE,
879 struct bpf_prog_offload_ops;
880 struct netlink_ext_ack;
882 struct xdp_dev_bulk_queue;
885 enum bpf_netdev_command command;
890 struct bpf_prog *prog;
891 struct netlink_ext_ack *extack;
893 /* XDP_QUERY_PROG, XDP_QUERY_PROG_HW */
896 /* flags with which program was installed */
899 /* BPF_OFFLOAD_MAP_ALLOC, BPF_OFFLOAD_MAP_FREE */
901 struct bpf_offloaded_map *offmap;
903 /* XDP_SETUP_XSK_UMEM */
905 struct xdp_umem *umem;
911 /* Flags for ndo_xsk_wakeup. */
912 #define XDP_WAKEUP_RX (1 << 0)
913 #define XDP_WAKEUP_TX (1 << 1)
915 #ifdef CONFIG_XFRM_OFFLOAD
917 int (*xdo_dev_state_add) (struct xfrm_state *x);
918 void (*xdo_dev_state_delete) (struct xfrm_state *x);
919 void (*xdo_dev_state_free) (struct xfrm_state *x);
920 bool (*xdo_dev_offload_ok) (struct sk_buff *skb,
921 struct xfrm_state *x);
922 void (*xdo_dev_state_advance_esn) (struct xfrm_state *x);
927 struct rcu_head rcuhead;
934 struct netdev_name_node {
935 struct hlist_node hlist;
936 struct list_head list;
937 struct net_device *dev;
941 int netdev_name_node_alt_create(struct net_device *dev, const char *name);
942 int netdev_name_node_alt_destroy(struct net_device *dev, const char *name);
944 struct netdev_net_notifier {
945 struct list_head list;
946 struct notifier_block *nb;
950 * This structure defines the management hooks for network devices.
951 * The following hooks can be defined; unless noted otherwise, they are
952 * optional and can be filled with a null pointer.
954 * int (*ndo_init)(struct net_device *dev);
955 * This function is called once when a network device is registered.
956 * The network device can use this for any late stage initialization
957 * or semantic validation. It can fail with an error code which will
958 * be propagated back to register_netdev.
960 * void (*ndo_uninit)(struct net_device *dev);
961 * This function is called when device is unregistered or when registration
962 * fails. It is not called if init fails.
964 * int (*ndo_open)(struct net_device *dev);
965 * This function is called when a network device transitions to the up
968 * int (*ndo_stop)(struct net_device *dev);
969 * This function is called when a network device transitions to the down
972 * netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
973 * struct net_device *dev);
974 * Called when a packet needs to be transmitted.
975 * Returns NETDEV_TX_OK. Can return NETDEV_TX_BUSY, but you should stop
976 * the queue before that can happen; it's for obsolete devices and weird
977 * corner cases, but the stack really does a non-trivial amount
978 * of useless work if you return NETDEV_TX_BUSY.
979 * Required; cannot be NULL.
981 * netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
982 * struct net_device *dev
983 * netdev_features_t features);
984 * Called by core transmit path to determine if device is capable of
985 * performing offload operations on a given packet. This is to give
986 * the device an opportunity to implement any restrictions that cannot
987 * be otherwise expressed by feature flags. The check is called with
988 * the set of features that the stack has calculated and it returns
989 * those the driver believes to be appropriate.
991 * u16 (*ndo_select_queue)(struct net_device *dev, struct sk_buff *skb,
992 * struct net_device *sb_dev);
993 * Called to decide which queue to use when device supports multiple
996 * void (*ndo_change_rx_flags)(struct net_device *dev, int flags);
997 * This function is called to allow device receiver to make
998 * changes to configuration when multicast or promiscuous is enabled.
1000 * void (*ndo_set_rx_mode)(struct net_device *dev);
1001 * This function is called device changes address list filtering.
1002 * If driver handles unicast address filtering, it should set
1003 * IFF_UNICAST_FLT in its priv_flags.
1005 * int (*ndo_set_mac_address)(struct net_device *dev, void *addr);
1006 * This function is called when the Media Access Control address
1007 * needs to be changed. If this interface is not defined, the
1008 * MAC address can not be changed.
1010 * int (*ndo_validate_addr)(struct net_device *dev);
1011 * Test if Media Access Control address is valid for the device.
1013 * int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
1014 * Called when a user requests an ioctl which can't be handled by
1015 * the generic interface code. If not defined ioctls return
1016 * not supported error code.
1018 * int (*ndo_set_config)(struct net_device *dev, struct ifmap *map);
1019 * Used to set network devices bus interface parameters. This interface
1020 * is retained for legacy reasons; new devices should use the bus
1021 * interface (PCI) for low level management.
1023 * int (*ndo_change_mtu)(struct net_device *dev, int new_mtu);
1024 * Called when a user wants to change the Maximum Transfer Unit
1027 * void (*ndo_tx_timeout)(struct net_device *dev, unsigned int txqueue);
1028 * Callback used when the transmitter has not made any progress
1029 * for dev->watchdog ticks.
1031 * void (*ndo_get_stats64)(struct net_device *dev,
1032 * struct rtnl_link_stats64 *storage);
1033 * struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1034 * Called when a user wants to get the network device usage
1035 * statistics. Drivers must do one of the following:
1036 * 1. Define @ndo_get_stats64 to fill in a zero-initialised
1037 * rtnl_link_stats64 structure passed by the caller.
1038 * 2. Define @ndo_get_stats to update a net_device_stats structure
1039 * (which should normally be dev->stats) and return a pointer to
1040 * it. The structure may be changed asynchronously only if each
1041 * field is written atomically.
1042 * 3. Update dev->stats asynchronously and atomically, and define
1043 * neither operation.
1045 * bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id)
1046 * Return true if this device supports offload stats of this attr_id.
1048 * int (*ndo_get_offload_stats)(int attr_id, const struct net_device *dev,
1050 * Get statistics for offload operations by attr_id. Write it into the
1051 * attr_data pointer.
1053 * int (*ndo_vlan_rx_add_vid)(struct net_device *dev, __be16 proto, u16 vid);
1054 * If device supports VLAN filtering this function is called when a
1055 * VLAN id is registered.
1057 * int (*ndo_vlan_rx_kill_vid)(struct net_device *dev, __be16 proto, u16 vid);
1058 * If device supports VLAN filtering this function is called when a
1059 * VLAN id is unregistered.
1061 * void (*ndo_poll_controller)(struct net_device *dev);
1063 * SR-IOV management functions.
1064 * int (*ndo_set_vf_mac)(struct net_device *dev, int vf, u8* mac);
1065 * int (*ndo_set_vf_vlan)(struct net_device *dev, int vf, u16 vlan,
1066 * u8 qos, __be16 proto);
1067 * int (*ndo_set_vf_rate)(struct net_device *dev, int vf, int min_tx_rate,
1069 * int (*ndo_set_vf_spoofchk)(struct net_device *dev, int vf, bool setting);
1070 * int (*ndo_set_vf_trust)(struct net_device *dev, int vf, bool setting);
1071 * int (*ndo_get_vf_config)(struct net_device *dev,
1072 * int vf, struct ifla_vf_info *ivf);
1073 * int (*ndo_set_vf_link_state)(struct net_device *dev, int vf, int link_state);
1074 * int (*ndo_set_vf_port)(struct net_device *dev, int vf,
1075 * struct nlattr *port[]);
1077 * Enable or disable the VF ability to query its RSS Redirection Table and
1078 * Hash Key. This is needed since on some devices VF share this information
1079 * with PF and querying it may introduce a theoretical security risk.
1080 * int (*ndo_set_vf_rss_query_en)(struct net_device *dev, int vf, bool setting);
1081 * int (*ndo_get_vf_port)(struct net_device *dev, int vf, struct sk_buff *skb);
1082 * int (*ndo_setup_tc)(struct net_device *dev, enum tc_setup_type type,
1084 * Called to setup any 'tc' scheduler, classifier or action on @dev.
1085 * This is always called from the stack with the rtnl lock held and netif
1086 * tx queues stopped. This allows the netdevice to perform queue
1087 * management safely.
1089 * Fiber Channel over Ethernet (FCoE) offload functions.
1090 * int (*ndo_fcoe_enable)(struct net_device *dev);
1091 * Called when the FCoE protocol stack wants to start using LLD for FCoE
1092 * so the underlying device can perform whatever needed configuration or
1093 * initialization to support acceleration of FCoE traffic.
1095 * int (*ndo_fcoe_disable)(struct net_device *dev);
1096 * Called when the FCoE protocol stack wants to stop using LLD for FCoE
1097 * so the underlying device can perform whatever needed clean-ups to
1098 * stop supporting acceleration of FCoE traffic.
1100 * int (*ndo_fcoe_ddp_setup)(struct net_device *dev, u16 xid,
1101 * struct scatterlist *sgl, unsigned int sgc);
1102 * Called when the FCoE Initiator wants to initialize an I/O that
1103 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1104 * perform necessary setup and returns 1 to indicate the device is set up
1105 * successfully to perform DDP on this I/O, otherwise this returns 0.
1107 * int (*ndo_fcoe_ddp_done)(struct net_device *dev, u16 xid);
1108 * Called when the FCoE Initiator/Target is done with the DDPed I/O as
1109 * indicated by the FC exchange id 'xid', so the underlying device can
1110 * clean up and reuse resources for later DDP requests.
1112 * int (*ndo_fcoe_ddp_target)(struct net_device *dev, u16 xid,
1113 * struct scatterlist *sgl, unsigned int sgc);
1114 * Called when the FCoE Target wants to initialize an I/O that
1115 * is a possible candidate for Direct Data Placement (DDP). The LLD can
1116 * perform necessary setup and returns 1 to indicate the device is set up
1117 * successfully to perform DDP on this I/O, otherwise this returns 0.
1119 * int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1120 * struct netdev_fcoe_hbainfo *hbainfo);
1121 * Called when the FCoE Protocol stack wants information on the underlying
1122 * device. This information is utilized by the FCoE protocol stack to
1123 * register attributes with Fiber Channel management service as per the
1124 * FC-GS Fabric Device Management Information(FDMI) specification.
1126 * int (*ndo_fcoe_get_wwn)(struct net_device *dev, u64 *wwn, int type);
1127 * Called when the underlying device wants to override default World Wide
1128 * Name (WWN) generation mechanism in FCoE protocol stack to pass its own
1129 * World Wide Port Name (WWPN) or World Wide Node Name (WWNN) to the FCoE
1130 * protocol stack to use.
1133 * int (*ndo_rx_flow_steer)(struct net_device *dev, const struct sk_buff *skb,
1134 * u16 rxq_index, u32 flow_id);
1135 * Set hardware filter for RFS. rxq_index is the target queue index;
1136 * flow_id is a flow ID to be passed to rps_may_expire_flow() later.
1137 * Return the filter ID on success, or a negative error code.
1139 * Slave management functions (for bridge, bonding, etc).
1140 * int (*ndo_add_slave)(struct net_device *dev, struct net_device *slave_dev);
1141 * Called to make another netdev an underling.
1143 * int (*ndo_del_slave)(struct net_device *dev, struct net_device *slave_dev);
1144 * Called to release previously enslaved netdev.
1146 * Feature/offload setting functions.
1147 * netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1148 * netdev_features_t features);
1149 * Adjusts the requested feature flags according to device-specific
1150 * constraints, and returns the resulting flags. Must not modify
1153 * int (*ndo_set_features)(struct net_device *dev, netdev_features_t features);
1154 * Called to update device configuration to new features. Passed
1155 * feature set might be less than what was returned by ndo_fix_features()).
1156 * Must return >0 or -errno if it changed dev->features itself.
1158 * int (*ndo_fdb_add)(struct ndmsg *ndm, struct nlattr *tb[],
1159 * struct net_device *dev,
1160 * const unsigned char *addr, u16 vid, u16 flags,
1161 * struct netlink_ext_ack *extack);
1162 * Adds an FDB entry to dev for addr.
1163 * int (*ndo_fdb_del)(struct ndmsg *ndm, struct nlattr *tb[],
1164 * struct net_device *dev,
1165 * const unsigned char *addr, u16 vid)
1166 * Deletes the FDB entry from dev coresponding to addr.
1167 * int (*ndo_fdb_dump)(struct sk_buff *skb, struct netlink_callback *cb,
1168 * struct net_device *dev, struct net_device *filter_dev,
1170 * Used to add FDB entries to dump requests. Implementers should add
1171 * entries to skb and update idx with the number of entries.
1173 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh,
1174 * u16 flags, struct netlink_ext_ack *extack)
1175 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,
1176 * struct net_device *dev, u32 filter_mask,
1178 * int (*ndo_bridge_dellink)(struct net_device *dev, struct nlmsghdr *nlh,
1181 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);
1182 * Called to change device carrier. Soft-devices (like dummy, team, etc)
1183 * which do not represent real hardware may define this to allow their
1184 * userspace components to manage their virtual carrier state. Devices
1185 * that determine carrier state from physical hardware properties (eg
1186 * network cables) or protocol-dependent mechanisms (eg
1187 * USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.
1189 * int (*ndo_get_phys_port_id)(struct net_device *dev,
1190 * struct netdev_phys_item_id *ppid);
1191 * Called to get ID of physical port of this device. If driver does
1192 * not implement this, it is assumed that the hw is not able to have
1193 * multiple net devices on single physical port.
1195 * int (*ndo_get_port_parent_id)(struct net_device *dev,
1196 * struct netdev_phys_item_id *ppid)
1197 * Called to get the parent ID of the physical port of this device.
1199 * void (*ndo_udp_tunnel_add)(struct net_device *dev,
1200 * struct udp_tunnel_info *ti);
1201 * Called by UDP tunnel to notify a driver about the UDP port and socket
1202 * address family that a UDP tunnel is listnening to. It is called only
1203 * when a new port starts listening. The operation is protected by the
1206 * void (*ndo_udp_tunnel_del)(struct net_device *dev,
1207 * struct udp_tunnel_info *ti);
1208 * Called by UDP tunnel to notify the driver about a UDP port and socket
1209 * address family that the UDP tunnel is not listening to anymore. The
1210 * operation is protected by the RTNL.
1212 * void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1213 * struct net_device *dev)
1214 * Called by upper layer devices to accelerate switching or other
1215 * station functionality into hardware. 'pdev is the lowerdev
1216 * to use for the offload and 'dev' is the net device that will
1217 * back the offload. Returns a pointer to the private structure
1218 * the upper layer will maintain.
1219 * void (*ndo_dfwd_del_station)(struct net_device *pdev, void *priv)
1220 * Called by upper layer device to delete the station created
1221 * by 'ndo_dfwd_add_station'. 'pdev' is the net device backing
1222 * the station and priv is the structure returned by the add
1224 * int (*ndo_set_tx_maxrate)(struct net_device *dev,
1225 * int queue_index, u32 maxrate);
1226 * Called when a user wants to set a max-rate limitation of specific
1228 * int (*ndo_get_iflink)(const struct net_device *dev);
1229 * Called to get the iflink value of this device.
1230 * void (*ndo_change_proto_down)(struct net_device *dev,
1232 * This function is used to pass protocol port error state information
1233 * to the switch driver. The switch driver can react to the proto_down
1234 * by doing a phys down on the associated switch port.
1235 * int (*ndo_fill_metadata_dst)(struct net_device *dev, struct sk_buff *skb);
1236 * This function is used to get egress tunnel information for given skb.
1237 * This is useful for retrieving outer tunnel header parameters while
1239 * void (*ndo_set_rx_headroom)(struct net_device *dev, int needed_headroom);
1240 * This function is used to specify the headroom that the skb must
1241 * consider when allocation skb during packet reception. Setting
1242 * appropriate rx headroom value allows avoiding skb head copy on
1243 * forward. Setting a negative value resets the rx headroom to the
1245 * int (*ndo_bpf)(struct net_device *dev, struct netdev_bpf *bpf);
1246 * This function is used to set or query state related to XDP on the
1247 * netdevice and manage BPF offload. See definition of
1248 * enum bpf_netdev_command for details.
1249 * int (*ndo_xdp_xmit)(struct net_device *dev, int n, struct xdp_frame **xdp,
1251 * This function is used to submit @n XDP packets for transmit on a
1252 * netdevice. Returns number of frames successfully transmitted, frames
1253 * that got dropped are freed/returned via xdp_return_frame().
1254 * Returns negative number, means general error invoking ndo, meaning
1255 * no frames were xmit'ed and core-caller will free all frames.
1256 * int (*ndo_xsk_wakeup)(struct net_device *dev, u32 queue_id, u32 flags);
1257 * This function is used to wake up the softirq, ksoftirqd or kthread
1258 * responsible for sending and/or receiving packets on a specific
1259 * queue id bound to an AF_XDP socket. The flags field specifies if
1260 * only RX, only Tx, or both should be woken up using the flags
1261 * XDP_WAKEUP_RX and XDP_WAKEUP_TX.
1262 * struct devlink_port *(*ndo_get_devlink_port)(struct net_device *dev);
1263 * Get devlink port instance associated with a given netdev.
1264 * Called with a reference on the netdevice and devlink locks only,
1265 * rtnl_lock is not held.
1267 struct net_device_ops {
1268 int (*ndo_init)(struct net_device *dev);
1269 void (*ndo_uninit)(struct net_device *dev);
1270 int (*ndo_open)(struct net_device *dev);
1271 int (*ndo_stop)(struct net_device *dev);
1272 netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
1273 struct net_device *dev);
1274 netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
1275 struct net_device *dev,
1276 netdev_features_t features);
1277 u16 (*ndo_select_queue)(struct net_device *dev,
1278 struct sk_buff *skb,
1279 struct net_device *sb_dev);
1280 void (*ndo_change_rx_flags)(struct net_device *dev,
1282 void (*ndo_set_rx_mode)(struct net_device *dev);
1283 int (*ndo_set_mac_address)(struct net_device *dev,
1285 int (*ndo_validate_addr)(struct net_device *dev);
1286 int (*ndo_do_ioctl)(struct net_device *dev,
1287 struct ifreq *ifr, int cmd);
1288 int (*ndo_set_config)(struct net_device *dev,
1290 int (*ndo_change_mtu)(struct net_device *dev,
1292 int (*ndo_neigh_setup)(struct net_device *dev,
1293 struct neigh_parms *);
1294 void (*ndo_tx_timeout) (struct net_device *dev,
1295 unsigned int txqueue);
1297 void (*ndo_get_stats64)(struct net_device *dev,
1298 struct rtnl_link_stats64 *storage);
1299 bool (*ndo_has_offload_stats)(const struct net_device *dev, int attr_id);
1300 int (*ndo_get_offload_stats)(int attr_id,
1301 const struct net_device *dev,
1303 struct net_device_stats* (*ndo_get_stats)(struct net_device *dev);
1305 int (*ndo_vlan_rx_add_vid)(struct net_device *dev,
1306 __be16 proto, u16 vid);
1307 int (*ndo_vlan_rx_kill_vid)(struct net_device *dev,
1308 __be16 proto, u16 vid);
1309 #ifdef CONFIG_NET_POLL_CONTROLLER
1310 void (*ndo_poll_controller)(struct net_device *dev);
1311 int (*ndo_netpoll_setup)(struct net_device *dev,
1312 struct netpoll_info *info);
1313 void (*ndo_netpoll_cleanup)(struct net_device *dev);
1315 int (*ndo_set_vf_mac)(struct net_device *dev,
1316 int queue, u8 *mac);
1317 int (*ndo_set_vf_vlan)(struct net_device *dev,
1318 int queue, u16 vlan,
1319 u8 qos, __be16 proto);
1320 int (*ndo_set_vf_rate)(struct net_device *dev,
1321 int vf, int min_tx_rate,
1323 int (*ndo_set_vf_spoofchk)(struct net_device *dev,
1324 int vf, bool setting);
1325 int (*ndo_set_vf_trust)(struct net_device *dev,
1326 int vf, bool setting);
1327 int (*ndo_get_vf_config)(struct net_device *dev,
1329 struct ifla_vf_info *ivf);
1330 int (*ndo_set_vf_link_state)(struct net_device *dev,
1331 int vf, int link_state);
1332 int (*ndo_get_vf_stats)(struct net_device *dev,
1334 struct ifla_vf_stats
1336 int (*ndo_set_vf_port)(struct net_device *dev,
1338 struct nlattr *port[]);
1339 int (*ndo_get_vf_port)(struct net_device *dev,
1340 int vf, struct sk_buff *skb);
1341 int (*ndo_get_vf_guid)(struct net_device *dev,
1343 struct ifla_vf_guid *node_guid,
1344 struct ifla_vf_guid *port_guid);
1345 int (*ndo_set_vf_guid)(struct net_device *dev,
1348 int (*ndo_set_vf_rss_query_en)(
1349 struct net_device *dev,
1350 int vf, bool setting);
1351 int (*ndo_setup_tc)(struct net_device *dev,
1352 enum tc_setup_type type,
1354 #if IS_ENABLED(CONFIG_FCOE)
1355 int (*ndo_fcoe_enable)(struct net_device *dev);
1356 int (*ndo_fcoe_disable)(struct net_device *dev);
1357 int (*ndo_fcoe_ddp_setup)(struct net_device *dev,
1359 struct scatterlist *sgl,
1361 int (*ndo_fcoe_ddp_done)(struct net_device *dev,
1363 int (*ndo_fcoe_ddp_target)(struct net_device *dev,
1365 struct scatterlist *sgl,
1367 int (*ndo_fcoe_get_hbainfo)(struct net_device *dev,
1368 struct netdev_fcoe_hbainfo *hbainfo);
1371 #if IS_ENABLED(CONFIG_LIBFCOE)
1372 #define NETDEV_FCOE_WWNN 0
1373 #define NETDEV_FCOE_WWPN 1
1374 int (*ndo_fcoe_get_wwn)(struct net_device *dev,
1375 u64 *wwn, int type);
1378 #ifdef CONFIG_RFS_ACCEL
1379 int (*ndo_rx_flow_steer)(struct net_device *dev,
1380 const struct sk_buff *skb,
1384 int (*ndo_add_slave)(struct net_device *dev,
1385 struct net_device *slave_dev,
1386 struct netlink_ext_ack *extack);
1387 int (*ndo_del_slave)(struct net_device *dev,
1388 struct net_device *slave_dev);
1389 netdev_features_t (*ndo_fix_features)(struct net_device *dev,
1390 netdev_features_t features);
1391 int (*ndo_set_features)(struct net_device *dev,
1392 netdev_features_t features);
1393 int (*ndo_neigh_construct)(struct net_device *dev,
1394 struct neighbour *n);
1395 void (*ndo_neigh_destroy)(struct net_device *dev,
1396 struct neighbour *n);
1398 int (*ndo_fdb_add)(struct ndmsg *ndm,
1399 struct nlattr *tb[],
1400 struct net_device *dev,
1401 const unsigned char *addr,
1404 struct netlink_ext_ack *extack);
1405 int (*ndo_fdb_del)(struct ndmsg *ndm,
1406 struct nlattr *tb[],
1407 struct net_device *dev,
1408 const unsigned char *addr,
1410 int (*ndo_fdb_dump)(struct sk_buff *skb,
1411 struct netlink_callback *cb,
1412 struct net_device *dev,
1413 struct net_device *filter_dev,
1415 int (*ndo_fdb_get)(struct sk_buff *skb,
1416 struct nlattr *tb[],
1417 struct net_device *dev,
1418 const unsigned char *addr,
1419 u16 vid, u32 portid, u32 seq,
1420 struct netlink_ext_ack *extack);
1421 int (*ndo_bridge_setlink)(struct net_device *dev,
1422 struct nlmsghdr *nlh,
1424 struct netlink_ext_ack *extack);
1425 int (*ndo_bridge_getlink)(struct sk_buff *skb,
1427 struct net_device *dev,
1430 int (*ndo_bridge_dellink)(struct net_device *dev,
1431 struct nlmsghdr *nlh,
1433 int (*ndo_change_carrier)(struct net_device *dev,
1435 int (*ndo_get_phys_port_id)(struct net_device *dev,
1436 struct netdev_phys_item_id *ppid);
1437 int (*ndo_get_port_parent_id)(struct net_device *dev,
1438 struct netdev_phys_item_id *ppid);
1439 int (*ndo_get_phys_port_name)(struct net_device *dev,
1440 char *name, size_t len);
1441 void (*ndo_udp_tunnel_add)(struct net_device *dev,
1442 struct udp_tunnel_info *ti);
1443 void (*ndo_udp_tunnel_del)(struct net_device *dev,
1444 struct udp_tunnel_info *ti);
1445 void* (*ndo_dfwd_add_station)(struct net_device *pdev,
1446 struct net_device *dev);
1447 void (*ndo_dfwd_del_station)(struct net_device *pdev,
1450 int (*ndo_set_tx_maxrate)(struct net_device *dev,
1453 int (*ndo_get_iflink)(const struct net_device *dev);
1454 int (*ndo_change_proto_down)(struct net_device *dev,
1456 int (*ndo_fill_metadata_dst)(struct net_device *dev,
1457 struct sk_buff *skb);
1458 void (*ndo_set_rx_headroom)(struct net_device *dev,
1459 int needed_headroom);
1460 int (*ndo_bpf)(struct net_device *dev,
1461 struct netdev_bpf *bpf);
1462 int (*ndo_xdp_xmit)(struct net_device *dev, int n,
1463 struct xdp_frame **xdp,
1465 int (*ndo_xsk_wakeup)(struct net_device *dev,
1466 u32 queue_id, u32 flags);
1467 struct devlink_port * (*ndo_get_devlink_port)(struct net_device *dev);
1471 * enum net_device_priv_flags - &struct net_device priv_flags
1473 * These are the &struct net_device, they are only set internally
1474 * by drivers and used in the kernel. These flags are invisible to
1475 * userspace; this means that the order of these flags can change
1476 * during any kernel release.
1478 * You should have a pretty good reason to be extending these flags.
1480 * @IFF_802_1Q_VLAN: 802.1Q VLAN device
1481 * @IFF_EBRIDGE: Ethernet bridging device
1482 * @IFF_BONDING: bonding master or slave
1483 * @IFF_ISATAP: ISATAP interface (RFC4214)
1484 * @IFF_WAN_HDLC: WAN HDLC device
1485 * @IFF_XMIT_DST_RELEASE: dev_hard_start_xmit() is allowed to
1487 * @IFF_DONT_BRIDGE: disallow bridging this ether dev
1488 * @IFF_DISABLE_NETPOLL: disable netpoll at run-time
1489 * @IFF_MACVLAN_PORT: device used as macvlan port
1490 * @IFF_BRIDGE_PORT: device used as bridge port
1491 * @IFF_OVS_DATAPATH: device used as Open vSwitch datapath port
1492 * @IFF_TX_SKB_SHARING: The interface supports sharing skbs on transmit
1493 * @IFF_UNICAST_FLT: Supports unicast filtering
1494 * @IFF_TEAM_PORT: device used as team port
1495 * @IFF_SUPP_NOFCS: device supports sending custom FCS
1496 * @IFF_LIVE_ADDR_CHANGE: device supports hardware address
1497 * change when it's running
1498 * @IFF_MACVLAN: Macvlan device
1499 * @IFF_XMIT_DST_RELEASE_PERM: IFF_XMIT_DST_RELEASE not taking into account
1500 * underlying stacked devices
1501 * @IFF_L3MDEV_MASTER: device is an L3 master device
1502 * @IFF_NO_QUEUE: device can run without qdisc attached
1503 * @IFF_OPENVSWITCH: device is a Open vSwitch master
1504 * @IFF_L3MDEV_SLAVE: device is enslaved to an L3 master device
1505 * @IFF_TEAM: device is a team device
1506 * @IFF_RXFH_CONFIGURED: device has had Rx Flow indirection table configured
1507 * @IFF_PHONY_HEADROOM: the headroom value is controlled by an external
1508 * entity (i.e. the master device for bridged veth)
1509 * @IFF_MACSEC: device is a MACsec device
1510 * @IFF_NO_RX_HANDLER: device doesn't support the rx_handler hook
1511 * @IFF_FAILOVER: device is a failover master device
1512 * @IFF_FAILOVER_SLAVE: device is lower dev of a failover master device
1513 * @IFF_L3MDEV_RX_HANDLER: only invoke the rx handler of L3 master device
1514 * @IFF_LIVE_RENAME_OK: rename is allowed while device is up and running
1516 enum netdev_priv_flags {
1517 IFF_802_1Q_VLAN = 1<<0,
1521 IFF_WAN_HDLC = 1<<4,
1522 IFF_XMIT_DST_RELEASE = 1<<5,
1523 IFF_DONT_BRIDGE = 1<<6,
1524 IFF_DISABLE_NETPOLL = 1<<7,
1525 IFF_MACVLAN_PORT = 1<<8,
1526 IFF_BRIDGE_PORT = 1<<9,
1527 IFF_OVS_DATAPATH = 1<<10,
1528 IFF_TX_SKB_SHARING = 1<<11,
1529 IFF_UNICAST_FLT = 1<<12,
1530 IFF_TEAM_PORT = 1<<13,
1531 IFF_SUPP_NOFCS = 1<<14,
1532 IFF_LIVE_ADDR_CHANGE = 1<<15,
1533 IFF_MACVLAN = 1<<16,
1534 IFF_XMIT_DST_RELEASE_PERM = 1<<17,
1535 IFF_L3MDEV_MASTER = 1<<18,
1536 IFF_NO_QUEUE = 1<<19,
1537 IFF_OPENVSWITCH = 1<<20,
1538 IFF_L3MDEV_SLAVE = 1<<21,
1540 IFF_RXFH_CONFIGURED = 1<<23,
1541 IFF_PHONY_HEADROOM = 1<<24,
1543 IFF_NO_RX_HANDLER = 1<<26,
1544 IFF_FAILOVER = 1<<27,
1545 IFF_FAILOVER_SLAVE = 1<<28,
1546 IFF_L3MDEV_RX_HANDLER = 1<<29,
1547 IFF_LIVE_RENAME_OK = 1<<30,
1550 #define IFF_802_1Q_VLAN IFF_802_1Q_VLAN
1551 #define IFF_EBRIDGE IFF_EBRIDGE
1552 #define IFF_BONDING IFF_BONDING
1553 #define IFF_ISATAP IFF_ISATAP
1554 #define IFF_WAN_HDLC IFF_WAN_HDLC
1555 #define IFF_XMIT_DST_RELEASE IFF_XMIT_DST_RELEASE
1556 #define IFF_DONT_BRIDGE IFF_DONT_BRIDGE
1557 #define IFF_DISABLE_NETPOLL IFF_DISABLE_NETPOLL
1558 #define IFF_MACVLAN_PORT IFF_MACVLAN_PORT
1559 #define IFF_BRIDGE_PORT IFF_BRIDGE_PORT
1560 #define IFF_OVS_DATAPATH IFF_OVS_DATAPATH
1561 #define IFF_TX_SKB_SHARING IFF_TX_SKB_SHARING
1562 #define IFF_UNICAST_FLT IFF_UNICAST_FLT
1563 #define IFF_TEAM_PORT IFF_TEAM_PORT
1564 #define IFF_SUPP_NOFCS IFF_SUPP_NOFCS
1565 #define IFF_LIVE_ADDR_CHANGE IFF_LIVE_ADDR_CHANGE
1566 #define IFF_MACVLAN IFF_MACVLAN
1567 #define IFF_XMIT_DST_RELEASE_PERM IFF_XMIT_DST_RELEASE_PERM
1568 #define IFF_L3MDEV_MASTER IFF_L3MDEV_MASTER
1569 #define IFF_NO_QUEUE IFF_NO_QUEUE
1570 #define IFF_OPENVSWITCH IFF_OPENVSWITCH
1571 #define IFF_L3MDEV_SLAVE IFF_L3MDEV_SLAVE
1572 #define IFF_TEAM IFF_TEAM
1573 #define IFF_RXFH_CONFIGURED IFF_RXFH_CONFIGURED
1574 #define IFF_MACSEC IFF_MACSEC
1575 #define IFF_NO_RX_HANDLER IFF_NO_RX_HANDLER
1576 #define IFF_FAILOVER IFF_FAILOVER
1577 #define IFF_FAILOVER_SLAVE IFF_FAILOVER_SLAVE
1578 #define IFF_L3MDEV_RX_HANDLER IFF_L3MDEV_RX_HANDLER
1579 #define IFF_LIVE_RENAME_OK IFF_LIVE_RENAME_OK
1582 * struct net_device - The DEVICE structure.
1584 * Actually, this whole structure is a big mistake. It mixes I/O
1585 * data with strictly "high-level" data, and it has to know about
1586 * almost every data structure used in the INET module.
1588 * @name: This is the first field of the "visible" part of this structure
1589 * (i.e. as seen by users in the "Space.c" file). It is the name
1592 * @name_node: Name hashlist node
1593 * @ifalias: SNMP alias
1594 * @mem_end: Shared memory end
1595 * @mem_start: Shared memory start
1596 * @base_addr: Device I/O address
1597 * @irq: Device IRQ number
1599 * @state: Generic network queuing layer state, see netdev_state_t
1600 * @dev_list: The global list of network devices
1601 * @napi_list: List entry used for polling NAPI devices
1602 * @unreg_list: List entry when we are unregistering the
1603 * device; see the function unregister_netdev
1604 * @close_list: List entry used when we are closing the device
1605 * @ptype_all: Device-specific packet handlers for all protocols
1606 * @ptype_specific: Device-specific, protocol-specific packet handlers
1608 * @adj_list: Directly linked devices, like slaves for bonding
1609 * @features: Currently active device features
1610 * @hw_features: User-changeable features
1612 * @wanted_features: User-requested features
1613 * @vlan_features: Mask of features inheritable by VLAN devices
1615 * @hw_enc_features: Mask of features inherited by encapsulating devices
1616 * This field indicates what encapsulation
1617 * offloads the hardware is capable of doing,
1618 * and drivers will need to set them appropriately.
1620 * @mpls_features: Mask of features inheritable by MPLS
1621 * @gso_partial_features: value(s) from NETIF_F_GSO\*
1623 * @ifindex: interface index
1624 * @group: The group the device belongs to
1626 * @stats: Statistics struct, which was left as a legacy, use
1627 * rtnl_link_stats64 instead
1629 * @rx_dropped: Dropped packets by core network,
1630 * do not use this in drivers
1631 * @tx_dropped: Dropped packets by core network,
1632 * do not use this in drivers
1633 * @rx_nohandler: nohandler dropped packets by core network on
1634 * inactive devices, do not use this in drivers
1635 * @carrier_up_count: Number of times the carrier has been up
1636 * @carrier_down_count: Number of times the carrier has been down
1638 * @wireless_handlers: List of functions to handle Wireless Extensions,
1640 * see <net/iw_handler.h> for details.
1641 * @wireless_data: Instance data managed by the core of wireless extensions
1643 * @netdev_ops: Includes several pointers to callbacks,
1644 * if one wants to override the ndo_*() functions
1645 * @ethtool_ops: Management operations
1646 * @l3mdev_ops: Layer 3 master device operations
1647 * @ndisc_ops: Includes callbacks for different IPv6 neighbour
1648 * discovery handling. Necessary for e.g. 6LoWPAN.
1649 * @xfrmdev_ops: Transformation offload operations
1650 * @tlsdev_ops: Transport Layer Security offload operations
1651 * @header_ops: Includes callbacks for creating,parsing,caching,etc
1652 * of Layer 2 headers.
1654 * @flags: Interface flags (a la BSD)
1655 * @priv_flags: Like 'flags' but invisible to userspace,
1656 * see if.h for the definitions
1657 * @gflags: Global flags ( kept as legacy )
1658 * @padded: How much padding added by alloc_netdev()
1659 * @operstate: RFC2863 operstate
1660 * @link_mode: Mapping policy to operstate
1661 * @if_port: Selectable AUI, TP, ...
1663 * @mtu: Interface MTU value
1664 * @min_mtu: Interface Minimum MTU value
1665 * @max_mtu: Interface Maximum MTU value
1666 * @type: Interface hardware type
1667 * @hard_header_len: Maximum hardware header length.
1668 * @min_header_len: Minimum hardware header length
1670 * @needed_headroom: Extra headroom the hardware may need, but not in all
1671 * cases can this be guaranteed
1672 * @needed_tailroom: Extra tailroom the hardware may need, but not in all
1673 * cases can this be guaranteed. Some cases also use
1674 * LL_MAX_HEADER instead to allocate the skb
1676 * interface address info:
1678 * @perm_addr: Permanent hw address
1679 * @addr_assign_type: Hw address assignment type
1680 * @addr_len: Hardware address length
1681 * @upper_level: Maximum depth level of upper devices.
1682 * @lower_level: Maximum depth level of lower devices.
1683 * @neigh_priv_len: Used in neigh_alloc()
1684 * @dev_id: Used to differentiate devices that share
1685 * the same link layer address
1686 * @dev_port: Used to differentiate devices that share
1688 * @addr_list_lock: XXX: need comments on this one
1689 * @name_assign_type: network interface name assignment type
1690 * @uc_promisc: Counter that indicates promiscuous mode
1691 * has been enabled due to the need to listen to
1692 * additional unicast addresses in a device that
1693 * does not implement ndo_set_rx_mode()
1694 * @uc: unicast mac addresses
1695 * @mc: multicast mac addresses
1696 * @dev_addrs: list of device hw addresses
1697 * @queues_kset: Group of all Kobjects in the Tx and RX queues
1698 * @promiscuity: Number of times the NIC is told to work in
1699 * promiscuous mode; if it becomes 0 the NIC will
1700 * exit promiscuous mode
1701 * @allmulti: Counter, enables or disables allmulticast mode
1703 * @vlan_info: VLAN info
1704 * @dsa_ptr: dsa specific data
1705 * @tipc_ptr: TIPC specific data
1706 * @atalk_ptr: AppleTalk link
1707 * @ip_ptr: IPv4 specific data
1708 * @dn_ptr: DECnet specific data
1709 * @ip6_ptr: IPv6 specific data
1710 * @ax25_ptr: AX.25 specific data
1711 * @ieee80211_ptr: IEEE 802.11 specific data, assign before registering
1712 * @ieee802154_ptr: IEEE 802.15.4 low-rate Wireless Personal Area Network
1714 * @mpls_ptr: mpls_dev struct pointer
1716 * @dev_addr: Hw address (before bcast,
1717 * because most packets are unicast)
1719 * @_rx: Array of RX queues
1720 * @num_rx_queues: Number of RX queues
1721 * allocated at register_netdev() time
1722 * @real_num_rx_queues: Number of RX queues currently active in device
1723 * @xdp_prog: XDP sockets filter program pointer
1724 * @gro_flush_timeout: timeout for GRO layer in NAPI
1726 * @rx_handler: handler for received packets
1727 * @rx_handler_data: XXX: need comments on this one
1728 * @miniq_ingress: ingress/clsact qdisc specific data for
1729 * ingress processing
1730 * @ingress_queue: XXX: need comments on this one
1731 * @nf_hooks_ingress: netfilter hooks executed for ingress packets
1732 * @broadcast: hw bcast address
1734 * @rx_cpu_rmap: CPU reverse-mapping for RX completion interrupts,
1735 * indexed by RX queue number. Assigned by driver.
1736 * This must only be set if the ndo_rx_flow_steer
1737 * operation is defined
1738 * @index_hlist: Device index hash chain
1740 * @_tx: Array of TX queues
1741 * @num_tx_queues: Number of TX queues allocated at alloc_netdev_mq() time
1742 * @real_num_tx_queues: Number of TX queues currently active in device
1743 * @qdisc: Root qdisc from userspace point of view
1744 * @tx_queue_len: Max frames per queue allowed
1745 * @tx_global_lock: XXX: need comments on this one
1746 * @xdp_bulkq: XDP device bulk queue
1747 * @xps_cpus_map: all CPUs map for XPS device
1748 * @xps_rxqs_map: all RXQs map for XPS device
1750 * @xps_maps: XXX: need comments on this one
1751 * @miniq_egress: clsact qdisc specific data for
1753 * @qdisc_hash: qdisc hash table
1754 * @watchdog_timeo: Represents the timeout that is used by
1755 * the watchdog (see dev_watchdog())
1756 * @watchdog_timer: List of timers
1758 * @pcpu_refcnt: Number of references to this device
1759 * @todo_list: Delayed register/unregister
1760 * @link_watch_list: XXX: need comments on this one
1762 * @reg_state: Register/unregister state machine
1763 * @dismantle: Device is going to be freed
1764 * @rtnl_link_state: This enum represents the phases of creating
1767 * @needs_free_netdev: Should unregister perform free_netdev?
1768 * @priv_destructor: Called from unregister
1769 * @npinfo: XXX: need comments on this one
1770 * @nd_net: Network namespace this network device is inside
1772 * @ml_priv: Mid-layer private
1773 * @lstats: Loopback statistics
1774 * @tstats: Tunnel statistics
1775 * @dstats: Dummy statistics
1776 * @vstats: Virtual ethernet statistics
1781 * @dev: Class/net/name entry
1782 * @sysfs_groups: Space for optional device, statistics and wireless
1785 * @sysfs_rx_queue_group: Space for optional per-rx queue attributes
1786 * @rtnl_link_ops: Rtnl_link_ops
1788 * @gso_max_size: Maximum size of generic segmentation offload
1789 * @gso_max_segs: Maximum number of segments that can be passed to the
1792 * @dcbnl_ops: Data Center Bridging netlink ops
1793 * @num_tc: Number of traffic classes in the net device
1794 * @tc_to_txq: XXX: need comments on this one
1795 * @prio_tc_map: XXX: need comments on this one
1797 * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp
1799 * @priomap: XXX: need comments on this one
1800 * @phydev: Physical device may attach itself
1801 * for hardware timestamping
1802 * @sfp_bus: attached &struct sfp_bus structure.
1803 * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
1805 * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
1806 * @qdisc_xmit_lock_key: lockdep class annotating
1807 * netdev_queue->_xmit_lock spinlock
1808 * @addr_list_lock_key: lockdep class annotating
1809 * net_device->addr_list_lock spinlock
1811 * @proto_down: protocol port state information can be sent to the
1812 * switch driver and used to set the phys state of the
1815 * @wol_enabled: Wake-on-LAN is enabled
1817 * @net_notifier_list: List of per-net netdev notifier block
1818 * that follow this device when it is moved
1819 * to another network namespace.
1821 * FIXME: cleanup struct net_device such that network protocol info
1826 char name[IFNAMSIZ];
1827 struct netdev_name_node *name_node;
1828 struct dev_ifalias __rcu *ifalias;
1830 * I/O specific fields
1831 * FIXME: Merge these and struct ifmap into one
1833 unsigned long mem_end;
1834 unsigned long mem_start;
1835 unsigned long base_addr;
1839 * Some hardware also needs these fields (state,dev_list,
1840 * napi_list,unreg_list,close_list) but they are not
1841 * part of the usual set specified in Space.c.
1844 unsigned long state;
1846 struct list_head dev_list;
1847 struct list_head napi_list;
1848 struct list_head unreg_list;
1849 struct list_head close_list;
1850 struct list_head ptype_all;
1851 struct list_head ptype_specific;
1854 struct list_head upper;
1855 struct list_head lower;
1858 netdev_features_t features;
1859 netdev_features_t hw_features;
1860 netdev_features_t wanted_features;
1861 netdev_features_t vlan_features;
1862 netdev_features_t hw_enc_features;
1863 netdev_features_t mpls_features;
1864 netdev_features_t gso_partial_features;
1869 struct net_device_stats stats;
1871 atomic_long_t rx_dropped;
1872 atomic_long_t tx_dropped;
1873 atomic_long_t rx_nohandler;
1875 /* Stats to monitor link on/off, flapping */
1876 atomic_t carrier_up_count;
1877 atomic_t carrier_down_count;
1879 #ifdef CONFIG_WIRELESS_EXT
1880 const struct iw_handler_def *wireless_handlers;
1881 struct iw_public_data *wireless_data;
1883 const struct net_device_ops *netdev_ops;
1884 const struct ethtool_ops *ethtool_ops;
1885 #ifdef CONFIG_NET_L3_MASTER_DEV
1886 const struct l3mdev_ops *l3mdev_ops;
1888 #if IS_ENABLED(CONFIG_IPV6)
1889 const struct ndisc_ops *ndisc_ops;
1892 #ifdef CONFIG_XFRM_OFFLOAD
1893 const struct xfrmdev_ops *xfrmdev_ops;
1896 #if IS_ENABLED(CONFIG_TLS_DEVICE)
1897 const struct tlsdev_ops *tlsdev_ops;
1900 const struct header_ops *header_ops;
1903 unsigned int priv_flags;
1905 unsigned short gflags;
1906 unsigned short padded;
1908 unsigned char operstate;
1909 unsigned char link_mode;
1911 unsigned char if_port;
1914 /* Note : dev->mtu is often read without holding a lock.
1915 * Writers usually hold RTNL.
1916 * It is recommended to use READ_ONCE() to annotate the reads,
1917 * and to use WRITE_ONCE() to annotate the writes.
1920 unsigned int min_mtu;
1921 unsigned int max_mtu;
1922 unsigned short type;
1923 unsigned short hard_header_len;
1924 unsigned char min_header_len;
1926 unsigned short needed_headroom;
1927 unsigned short needed_tailroom;
1929 /* Interface address info. */
1930 unsigned char perm_addr[MAX_ADDR_LEN];
1931 unsigned char addr_assign_type;
1932 unsigned char addr_len;
1933 unsigned char upper_level;
1934 unsigned char lower_level;
1935 unsigned short neigh_priv_len;
1936 unsigned short dev_id;
1937 unsigned short dev_port;
1938 spinlock_t addr_list_lock;
1939 unsigned char name_assign_type;
1941 struct netdev_hw_addr_list uc;
1942 struct netdev_hw_addr_list mc;
1943 struct netdev_hw_addr_list dev_addrs;
1946 struct kset *queues_kset;
1948 unsigned int promiscuity;
1949 unsigned int allmulti;
1952 /* Protocol-specific pointers */
1954 #if IS_ENABLED(CONFIG_VLAN_8021Q)
1955 struct vlan_info __rcu *vlan_info;
1957 #if IS_ENABLED(CONFIG_NET_DSA)
1958 struct dsa_port *dsa_ptr;
1960 #if IS_ENABLED(CONFIG_TIPC)
1961 struct tipc_bearer __rcu *tipc_ptr;
1963 #if IS_ENABLED(CONFIG_IRDA) || IS_ENABLED(CONFIG_ATALK)
1966 struct in_device __rcu *ip_ptr;
1967 #if IS_ENABLED(CONFIG_DECNET)
1968 struct dn_dev __rcu *dn_ptr;
1970 struct inet6_dev __rcu *ip6_ptr;
1971 #if IS_ENABLED(CONFIG_AX25)
1974 struct wireless_dev *ieee80211_ptr;
1975 struct wpan_dev *ieee802154_ptr;
1976 #if IS_ENABLED(CONFIG_MPLS_ROUTING)
1977 struct mpls_dev __rcu *mpls_ptr;
1981 * Cache lines mostly used on receive path (including eth_type_trans())
1983 /* Interface address info used in eth_type_trans() */
1984 unsigned char *dev_addr;
1986 struct netdev_rx_queue *_rx;
1987 unsigned int num_rx_queues;
1988 unsigned int real_num_rx_queues;
1990 struct bpf_prog __rcu *xdp_prog;
1991 unsigned long gro_flush_timeout;
1992 rx_handler_func_t __rcu *rx_handler;
1993 void __rcu *rx_handler_data;
1995 #ifdef CONFIG_NET_CLS_ACT
1996 struct mini_Qdisc __rcu *miniq_ingress;
1998 struct netdev_queue __rcu *ingress_queue;
1999 #ifdef CONFIG_NETFILTER_INGRESS
2000 struct nf_hook_entries __rcu *nf_hooks_ingress;
2003 unsigned char broadcast[MAX_ADDR_LEN];
2004 #ifdef CONFIG_RFS_ACCEL
2005 struct cpu_rmap *rx_cpu_rmap;
2007 struct hlist_node index_hlist;
2010 * Cache lines mostly used on transmit path
2012 struct netdev_queue *_tx ____cacheline_aligned_in_smp;
2013 unsigned int num_tx_queues;
2014 unsigned int real_num_tx_queues;
2015 struct Qdisc *qdisc;
2016 unsigned int tx_queue_len;
2017 spinlock_t tx_global_lock;
2019 struct xdp_dev_bulk_queue __percpu *xdp_bulkq;
2022 struct xps_dev_maps __rcu *xps_cpus_map;
2023 struct xps_dev_maps __rcu *xps_rxqs_map;
2025 #ifdef CONFIG_NET_CLS_ACT
2026 struct mini_Qdisc __rcu *miniq_egress;
2029 #ifdef CONFIG_NET_SCHED
2030 DECLARE_HASHTABLE (qdisc_hash, 4);
2032 /* These may be needed for future network-power-down code. */
2033 struct timer_list watchdog_timer;
2036 struct list_head todo_list;
2037 int __percpu *pcpu_refcnt;
2039 struct list_head link_watch_list;
2041 enum { NETREG_UNINITIALIZED=0,
2042 NETREG_REGISTERED, /* completed register_netdevice */
2043 NETREG_UNREGISTERING, /* called unregister_netdevice */
2044 NETREG_UNREGISTERED, /* completed unregister todo */
2045 NETREG_RELEASED, /* called free_netdev */
2046 NETREG_DUMMY, /* dummy device for NAPI poll */
2052 RTNL_LINK_INITIALIZED,
2053 RTNL_LINK_INITIALIZING,
2054 } rtnl_link_state:16;
2056 bool needs_free_netdev;
2057 void (*priv_destructor)(struct net_device *dev);
2059 #ifdef CONFIG_NETPOLL
2060 struct netpoll_info __rcu *npinfo;
2063 possible_net_t nd_net;
2065 /* mid-layer private */
2068 struct pcpu_lstats __percpu *lstats;
2069 struct pcpu_sw_netstats __percpu *tstats;
2070 struct pcpu_dstats __percpu *dstats;
2073 #if IS_ENABLED(CONFIG_GARP)
2074 struct garp_port __rcu *garp_port;
2076 #if IS_ENABLED(CONFIG_MRP)
2077 struct mrp_port __rcu *mrp_port;
2081 const struct attribute_group *sysfs_groups[4];
2082 const struct attribute_group *sysfs_rx_queue_group;
2084 const struct rtnl_link_ops *rtnl_link_ops;
2086 /* for setting kernel sock attribute on TCP connection setup */
2087 #define GSO_MAX_SIZE 65536
2088 unsigned int gso_max_size;
2089 #define GSO_MAX_SEGS 65535
2093 const struct dcbnl_rtnl_ops *dcbnl_ops;
2096 struct netdev_tc_txq tc_to_txq[TC_MAX_QUEUE];
2097 u8 prio_tc_map[TC_BITMASK + 1];
2099 #if IS_ENABLED(CONFIG_FCOE)
2100 unsigned int fcoe_ddp_xid;
2102 #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO)
2103 struct netprio_map __rcu *priomap;
2105 struct phy_device *phydev;
2106 struct sfp_bus *sfp_bus;
2107 struct lock_class_key qdisc_tx_busylock_key;
2108 struct lock_class_key qdisc_running_key;
2109 struct lock_class_key qdisc_xmit_lock_key;
2110 struct lock_class_key addr_list_lock_key;
2112 unsigned wol_enabled:1;
2114 struct list_head net_notifier_list;
2116 #define to_net_dev(d) container_of(d, struct net_device, dev)
2118 static inline bool netif_elide_gro(const struct net_device *dev)
2120 if (!(dev->features & NETIF_F_GRO) || dev->xdp_prog)
2125 #define NETDEV_ALIGN 32
2128 int netdev_get_prio_tc_map(const struct net_device *dev, u32 prio)
2130 return dev->prio_tc_map[prio & TC_BITMASK];
2134 int netdev_set_prio_tc_map(struct net_device *dev, u8 prio, u8 tc)
2136 if (tc >= dev->num_tc)
2139 dev->prio_tc_map[prio & TC_BITMASK] = tc & TC_BITMASK;
2143 int netdev_txq_to_tc(struct net_device *dev, unsigned int txq);
2144 void netdev_reset_tc(struct net_device *dev);
2145 int netdev_set_tc_queue(struct net_device *dev, u8 tc, u16 count, u16 offset);
2146 int netdev_set_num_tc(struct net_device *dev, u8 num_tc);
2149 int netdev_get_num_tc(struct net_device *dev)
2154 void netdev_unbind_sb_channel(struct net_device *dev,
2155 struct net_device *sb_dev);
2156 int netdev_bind_sb_channel_queue(struct net_device *dev,
2157 struct net_device *sb_dev,
2158 u8 tc, u16 count, u16 offset);
2159 int netdev_set_sb_channel(struct net_device *dev, u16 channel);
2160 static inline int netdev_get_sb_channel(struct net_device *dev)
2162 return max_t(int, -dev->num_tc, 0);
2166 struct netdev_queue *netdev_get_tx_queue(const struct net_device *dev,
2169 return &dev->_tx[index];
2172 static inline struct netdev_queue *skb_get_tx_queue(const struct net_device *dev,
2173 const struct sk_buff *skb)
2175 return netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
2178 static inline void netdev_for_each_tx_queue(struct net_device *dev,
2179 void (*f)(struct net_device *,
2180 struct netdev_queue *,
2186 for (i = 0; i < dev->num_tx_queues; i++)
2187 f(dev, &dev->_tx[i], arg);
2190 u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
2191 struct net_device *sb_dev);
2192 struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
2193 struct sk_buff *skb,
2194 struct net_device *sb_dev);
2196 /* returns the headroom that the master device needs to take in account
2197 * when forwarding to this dev
2199 static inline unsigned netdev_get_fwd_headroom(struct net_device *dev)
2201 return dev->priv_flags & IFF_PHONY_HEADROOM ? 0 : dev->needed_headroom;
2204 static inline void netdev_set_rx_headroom(struct net_device *dev, int new_hr)
2206 if (dev->netdev_ops->ndo_set_rx_headroom)
2207 dev->netdev_ops->ndo_set_rx_headroom(dev, new_hr);
2210 /* set the device rx headroom to the dev's default */
2211 static inline void netdev_reset_rx_headroom(struct net_device *dev)
2213 netdev_set_rx_headroom(dev, -1);
2217 * Net namespace inlines
2220 struct net *dev_net(const struct net_device *dev)
2222 return read_pnet(&dev->nd_net);
2226 void dev_net_set(struct net_device *dev, struct net *net)
2228 write_pnet(&dev->nd_net, net);
2232 * netdev_priv - access network device private data
2233 * @dev: network device
2235 * Get network device private data
2237 static inline void *netdev_priv(const struct net_device *dev)
2239 return (char *)dev + ALIGN(sizeof(struct net_device), NETDEV_ALIGN);
2242 /* Set the sysfs physical device reference for the network logical device
2243 * if set prior to registration will cause a symlink during initialization.
2245 #define SET_NETDEV_DEV(net, pdev) ((net)->dev.parent = (pdev))
2247 /* Set the sysfs device type for the network logical device to allow
2248 * fine-grained identification of different network device types. For
2249 * example Ethernet, Wireless LAN, Bluetooth, WiMAX etc.
2251 #define SET_NETDEV_DEVTYPE(net, devtype) ((net)->dev.type = (devtype))
2253 /* Default NAPI poll() weight
2254 * Device drivers are strongly advised to not use bigger value
2256 #define NAPI_POLL_WEIGHT 64
2259 * netif_napi_add - initialize a NAPI context
2260 * @dev: network device
2261 * @napi: NAPI context
2262 * @poll: polling function
2263 * @weight: default weight
2265 * netif_napi_add() must be used to initialize a NAPI context prior to calling
2266 * *any* of the other NAPI-related functions.
2268 void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
2269 int (*poll)(struct napi_struct *, int), int weight);
2272 * netif_tx_napi_add - initialize a NAPI context
2273 * @dev: network device
2274 * @napi: NAPI context
2275 * @poll: polling function
2276 * @weight: default weight
2278 * This variant of netif_napi_add() should be used from drivers using NAPI
2279 * to exclusively poll a TX queue.
2280 * This will avoid we add it into napi_hash[], thus polluting this hash table.
2282 static inline void netif_tx_napi_add(struct net_device *dev,
2283 struct napi_struct *napi,
2284 int (*poll)(struct napi_struct *, int),
2287 set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
2288 netif_napi_add(dev, napi, poll, weight);
2292 * netif_napi_del - remove a NAPI context
2293 * @napi: NAPI context
2295 * netif_napi_del() removes a NAPI context from the network device NAPI list
2297 void netif_napi_del(struct napi_struct *napi);
2299 struct napi_gro_cb {
2300 /* Virtual address of skb_shinfo(skb)->frags[0].page + offset. */
2303 /* Length of frag0. */
2304 unsigned int frag0_len;
2306 /* This indicates where we are processing relative to skb->data. */
2309 /* This is non-zero if the packet cannot be merged with the new skb. */
2312 /* Save the IP ID here and check when we get to the transport layer */
2315 /* Number of segments aggregated. */
2318 /* Start offset for remote checksum offload */
2319 u16 gro_remcsum_start;
2321 /* jiffies when first packet was created/queued */
2324 /* Used in ipv6_gro_receive() and foo-over-udp */
2327 /* This is non-zero if the packet may be of the same flow. */
2330 /* Used in tunnel GRO receive */
2333 /* GRO checksum is valid */
2336 /* Number of checksums via CHECKSUM_UNNECESSARY */
2341 #define NAPI_GRO_FREE 1
2342 #define NAPI_GRO_FREE_STOLEN_HEAD 2
2344 /* Used in foo-over-udp, set in udp[46]_gro_receive */
2347 /* Used in GRE, set in fou/gue_gro_receive */
2350 /* Used to determine if flush_id can be ignored */
2353 /* Number of gro_receive callbacks this packet already went through */
2354 u8 recursion_counter:4;
2356 /* GRO is done by frag_list pointer chaining. */
2359 /* used to support CHECKSUM_COMPLETE for tunneling protocols */
2362 /* used in skb_gro_receive() slow path */
2363 struct sk_buff *last;
2366 #define NAPI_GRO_CB(skb) ((struct napi_gro_cb *)(skb)->cb)
2368 #define GRO_RECURSION_LIMIT 15
2369 static inline int gro_recursion_inc_test(struct sk_buff *skb)
2371 return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT;
2374 typedef struct sk_buff *(*gro_receive_t)(struct list_head *, struct sk_buff *);
2375 static inline struct sk_buff *call_gro_receive(gro_receive_t cb,
2376 struct list_head *head,
2377 struct sk_buff *skb)
2379 if (unlikely(gro_recursion_inc_test(skb))) {
2380 NAPI_GRO_CB(skb)->flush |= 1;
2384 return cb(head, skb);
2387 typedef struct sk_buff *(*gro_receive_sk_t)(struct sock *, struct list_head *,
2389 static inline struct sk_buff *call_gro_receive_sk(gro_receive_sk_t cb,
2391 struct list_head *head,
2392 struct sk_buff *skb)
2394 if (unlikely(gro_recursion_inc_test(skb))) {
2395 NAPI_GRO_CB(skb)->flush |= 1;
2399 return cb(sk, head, skb);
2402 struct packet_type {
2403 __be16 type; /* This is really htons(ether_type). */
2404 bool ignore_outgoing;
2405 struct net_device *dev; /* NULL is wildcarded here */
2406 int (*func) (struct sk_buff *,
2407 struct net_device *,
2408 struct packet_type *,
2409 struct net_device *);
2410 void (*list_func) (struct list_head *,
2411 struct packet_type *,
2412 struct net_device *);
2413 bool (*id_match)(struct packet_type *ptype,
2415 void *af_packet_priv;
2416 struct list_head list;
2419 struct offload_callbacks {
2420 struct sk_buff *(*gso_segment)(struct sk_buff *skb,
2421 netdev_features_t features);
2422 struct sk_buff *(*gro_receive)(struct list_head *head,
2423 struct sk_buff *skb);
2424 int (*gro_complete)(struct sk_buff *skb, int nhoff);
2427 struct packet_offload {
2428 __be16 type; /* This is really htons(ether_type). */
2430 struct offload_callbacks callbacks;
2431 struct list_head list;
2434 /* often modified stats are per-CPU, other are shared (netdev->stats) */
2435 struct pcpu_sw_netstats {
2440 struct u64_stats_sync syncp;
2441 } __aligned(4 * sizeof(u64));
2443 struct pcpu_lstats {
2444 u64_stats_t packets;
2446 struct u64_stats_sync syncp;
2447 } __aligned(2 * sizeof(u64));
2449 void dev_lstats_read(struct net_device *dev, u64 *packets, u64 *bytes);
2451 static inline void dev_lstats_add(struct net_device *dev, unsigned int len)
2453 struct pcpu_lstats *lstats = this_cpu_ptr(dev->lstats);
2455 u64_stats_update_begin(&lstats->syncp);
2456 u64_stats_add(&lstats->bytes, len);
2457 u64_stats_inc(&lstats->packets);
2458 u64_stats_update_end(&lstats->syncp);
2461 #define __netdev_alloc_pcpu_stats(type, gfp) \
2463 typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
2466 for_each_possible_cpu(__cpu) { \
2467 typeof(type) *stat; \
2468 stat = per_cpu_ptr(pcpu_stats, __cpu); \
2469 u64_stats_init(&stat->syncp); \
2475 #define netdev_alloc_pcpu_stats(type) \
2476 __netdev_alloc_pcpu_stats(type, GFP_KERNEL)
2478 enum netdev_lag_tx_type {
2479 NETDEV_LAG_TX_TYPE_UNKNOWN,
2480 NETDEV_LAG_TX_TYPE_RANDOM,
2481 NETDEV_LAG_TX_TYPE_BROADCAST,
2482 NETDEV_LAG_TX_TYPE_ROUNDROBIN,
2483 NETDEV_LAG_TX_TYPE_ACTIVEBACKUP,
2484 NETDEV_LAG_TX_TYPE_HASH,
2487 enum netdev_lag_hash {
2488 NETDEV_LAG_HASH_NONE,
2490 NETDEV_LAG_HASH_L34,
2491 NETDEV_LAG_HASH_L23,
2492 NETDEV_LAG_HASH_E23,
2493 NETDEV_LAG_HASH_E34,
2494 NETDEV_LAG_HASH_UNKNOWN,
2497 struct netdev_lag_upper_info {
2498 enum netdev_lag_tx_type tx_type;
2499 enum netdev_lag_hash hash_type;
2502 struct netdev_lag_lower_state_info {
2507 #include <linux/notifier.h>
2509 /* netdevice notifier chain. Please remember to update netdev_cmd_to_name()
2510 * and the rtnetlink notification exclusion list in rtnetlink_event() when
2514 NETDEV_UP = 1, /* For now you can't veto a device up/down */
2516 NETDEV_REBOOT, /* Tell a protocol stack a network interface
2517 detected a hardware crash and restarted
2518 - we can use this eg to kick tcp sessions
2520 NETDEV_CHANGE, /* Notify device state change */
2523 NETDEV_CHANGEMTU, /* notify after mtu change happened */
2524 NETDEV_CHANGEADDR, /* notify after the address change */
2525 NETDEV_PRE_CHANGEADDR, /* notify before the address change */
2529 NETDEV_BONDING_FAILOVER,
2531 NETDEV_PRE_TYPE_CHANGE,
2532 NETDEV_POST_TYPE_CHANGE,
2535 NETDEV_NOTIFY_PEERS,
2539 NETDEV_PRECHANGEMTU, /* notify before mtu change happened */
2540 NETDEV_CHANGEINFODATA,
2541 NETDEV_BONDING_INFO,
2542 NETDEV_PRECHANGEUPPER,
2543 NETDEV_CHANGELOWERSTATE,
2544 NETDEV_UDP_TUNNEL_PUSH_INFO,
2545 NETDEV_UDP_TUNNEL_DROP_INFO,
2546 NETDEV_CHANGE_TX_QUEUE_LEN,
2547 NETDEV_CVLAN_FILTER_PUSH_INFO,
2548 NETDEV_CVLAN_FILTER_DROP_INFO,
2549 NETDEV_SVLAN_FILTER_PUSH_INFO,
2550 NETDEV_SVLAN_FILTER_DROP_INFO,
2552 const char *netdev_cmd_to_name(enum netdev_cmd cmd);
2554 int register_netdevice_notifier(struct notifier_block *nb);
2555 int unregister_netdevice_notifier(struct notifier_block *nb);
2556 int register_netdevice_notifier_net(struct net *net, struct notifier_block *nb);
2557 int unregister_netdevice_notifier_net(struct net *net,
2558 struct notifier_block *nb);
2559 int register_netdevice_notifier_dev_net(struct net_device *dev,
2560 struct notifier_block *nb,
2561 struct netdev_net_notifier *nn);
2562 int unregister_netdevice_notifier_dev_net(struct net_device *dev,
2563 struct notifier_block *nb,
2564 struct netdev_net_notifier *nn);
2566 struct netdev_notifier_info {
2567 struct net_device *dev;
2568 struct netlink_ext_ack *extack;
2571 struct netdev_notifier_info_ext {
2572 struct netdev_notifier_info info; /* must be first */
2578 struct netdev_notifier_change_info {
2579 struct netdev_notifier_info info; /* must be first */
2580 unsigned int flags_changed;
2583 struct netdev_notifier_changeupper_info {
2584 struct netdev_notifier_info info; /* must be first */
2585 struct net_device *upper_dev; /* new upper dev */
2586 bool master; /* is upper dev master */
2587 bool linking; /* is the notification for link or unlink */
2588 void *upper_info; /* upper dev info */
2591 struct netdev_notifier_changelowerstate_info {
2592 struct netdev_notifier_info info; /* must be first */
2593 void *lower_state_info; /* is lower dev state */
2596 struct netdev_notifier_pre_changeaddr_info {
2597 struct netdev_notifier_info info; /* must be first */
2598 const unsigned char *dev_addr;
2601 static inline void netdev_notifier_info_init(struct netdev_notifier_info *info,
2602 struct net_device *dev)
2605 info->extack = NULL;
2608 static inline struct net_device *
2609 netdev_notifier_info_to_dev(const struct netdev_notifier_info *info)
2614 static inline struct netlink_ext_ack *
2615 netdev_notifier_info_to_extack(const struct netdev_notifier_info *info)
2617 return info->extack;
2620 int call_netdevice_notifiers(unsigned long val, struct net_device *dev);
2623 extern rwlock_t dev_base_lock; /* Device list lock */
2625 #define for_each_netdev(net, d) \
2626 list_for_each_entry(d, &(net)->dev_base_head, dev_list)
2627 #define for_each_netdev_reverse(net, d) \
2628 list_for_each_entry_reverse(d, &(net)->dev_base_head, dev_list)
2629 #define for_each_netdev_rcu(net, d) \
2630 list_for_each_entry_rcu(d, &(net)->dev_base_head, dev_list)
2631 #define for_each_netdev_safe(net, d, n) \
2632 list_for_each_entry_safe(d, n, &(net)->dev_base_head, dev_list)
2633 #define for_each_netdev_continue(net, d) \
2634 list_for_each_entry_continue(d, &(net)->dev_base_head, dev_list)
2635 #define for_each_netdev_continue_reverse(net, d) \
2636 list_for_each_entry_continue_reverse(d, &(net)->dev_base_head, \
2638 #define for_each_netdev_continue_rcu(net, d) \
2639 list_for_each_entry_continue_rcu(d, &(net)->dev_base_head, dev_list)
2640 #define for_each_netdev_in_bond_rcu(bond, slave) \
2641 for_each_netdev_rcu(&init_net, slave) \
2642 if (netdev_master_upper_dev_get_rcu(slave) == (bond))
2643 #define net_device_entry(lh) list_entry(lh, struct net_device, dev_list)
2645 static inline struct net_device *next_net_device(struct net_device *dev)
2647 struct list_head *lh;
2651 lh = dev->dev_list.next;
2652 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2655 static inline struct net_device *next_net_device_rcu(struct net_device *dev)
2657 struct list_head *lh;
2661 lh = rcu_dereference(list_next_rcu(&dev->dev_list));
2662 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2665 static inline struct net_device *first_net_device(struct net *net)
2667 return list_empty(&net->dev_base_head) ? NULL :
2668 net_device_entry(net->dev_base_head.next);
2671 static inline struct net_device *first_net_device_rcu(struct net *net)
2673 struct list_head *lh = rcu_dereference(list_next_rcu(&net->dev_base_head));
2675 return lh == &net->dev_base_head ? NULL : net_device_entry(lh);
2678 int netdev_boot_setup_check(struct net_device *dev);
2679 unsigned long netdev_boot_base(const char *prefix, int unit);
2680 struct net_device *dev_getbyhwaddr_rcu(struct net *net, unsigned short type,
2681 const char *hwaddr);
2682 struct net_device *dev_getfirstbyhwtype(struct net *net, unsigned short type);
2683 struct net_device *__dev_getfirstbyhwtype(struct net *net, unsigned short type);
2684 void dev_add_pack(struct packet_type *pt);
2685 void dev_remove_pack(struct packet_type *pt);
2686 void __dev_remove_pack(struct packet_type *pt);
2687 void dev_add_offload(struct packet_offload *po);
2688 void dev_remove_offload(struct packet_offload *po);
2690 int dev_get_iflink(const struct net_device *dev);
2691 int dev_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb);
2692 struct net_device *__dev_get_by_flags(struct net *net, unsigned short flags,
2693 unsigned short mask);
2694 struct net_device *dev_get_by_name(struct net *net, const char *name);
2695 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
2696 struct net_device *__dev_get_by_name(struct net *net, const char *name);
2697 int dev_alloc_name(struct net_device *dev, const char *name);
2698 int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
2699 void dev_close(struct net_device *dev);
2700 void dev_close_many(struct list_head *head, bool unlink);
2701 void dev_disable_lro(struct net_device *dev);
2702 int dev_loopback_xmit(struct net *net, struct sock *sk, struct sk_buff *newskb);
2703 u16 dev_pick_tx_zero(struct net_device *dev, struct sk_buff *skb,
2704 struct net_device *sb_dev);
2705 u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
2706 struct net_device *sb_dev);
2707 int dev_queue_xmit(struct sk_buff *skb);
2708 int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
2709 int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
2710 int register_netdevice(struct net_device *dev);
2711 void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
2712 void unregister_netdevice_many(struct list_head *head);
2713 static inline void unregister_netdevice(struct net_device *dev)
2715 unregister_netdevice_queue(dev, NULL);
2718 int netdev_refcnt_read(const struct net_device *dev);
2719 void free_netdev(struct net_device *dev);
2720 void netdev_freemem(struct net_device *dev);
2721 void synchronize_net(void);
2722 int init_dummy_netdev(struct net_device *dev);
2724 struct net_device *dev_get_by_index(struct net *net, int ifindex);
2725 struct net_device *__dev_get_by_index(struct net *net, int ifindex);
2726 struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex);
2727 struct net_device *dev_get_by_napi_id(unsigned int napi_id);
2728 int netdev_get_name(struct net *net, char *name, int ifindex);
2729 int dev_restart(struct net_device *dev);
2730 int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb);
2731 int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb);
2733 static inline unsigned int skb_gro_offset(const struct sk_buff *skb)
2735 return NAPI_GRO_CB(skb)->data_offset;
2738 static inline unsigned int skb_gro_len(const struct sk_buff *skb)
2740 return skb->len - NAPI_GRO_CB(skb)->data_offset;
2743 static inline void skb_gro_pull(struct sk_buff *skb, unsigned int len)
2745 NAPI_GRO_CB(skb)->data_offset += len;
2748 static inline void *skb_gro_header_fast(struct sk_buff *skb,
2749 unsigned int offset)
2751 return NAPI_GRO_CB(skb)->frag0 + offset;
2754 static inline int skb_gro_header_hard(struct sk_buff *skb, unsigned int hlen)
2756 return NAPI_GRO_CB(skb)->frag0_len < hlen;
2759 static inline void skb_gro_frag0_invalidate(struct sk_buff *skb)
2761 NAPI_GRO_CB(skb)->frag0 = NULL;
2762 NAPI_GRO_CB(skb)->frag0_len = 0;
2765 static inline void *skb_gro_header_slow(struct sk_buff *skb, unsigned int hlen,
2766 unsigned int offset)
2768 if (!pskb_may_pull(skb, hlen))
2771 skb_gro_frag0_invalidate(skb);
2772 return skb->data + offset;
2775 static inline void *skb_gro_network_header(struct sk_buff *skb)
2777 return (NAPI_GRO_CB(skb)->frag0 ?: skb->data) +
2778 skb_network_offset(skb);
2781 static inline void skb_gro_postpull_rcsum(struct sk_buff *skb,
2782 const void *start, unsigned int len)
2784 if (NAPI_GRO_CB(skb)->csum_valid)
2785 NAPI_GRO_CB(skb)->csum = csum_sub(NAPI_GRO_CB(skb)->csum,
2786 csum_partial(start, len, 0));
2789 /* GRO checksum functions. These are logical equivalents of the normal
2790 * checksum functions (in skbuff.h) except that they operate on the GRO
2791 * offsets and fields in sk_buff.
2794 __sum16 __skb_gro_checksum_complete(struct sk_buff *skb);
2796 static inline bool skb_at_gro_remcsum_start(struct sk_buff *skb)
2798 return (NAPI_GRO_CB(skb)->gro_remcsum_start == skb_gro_offset(skb));
2801 static inline bool __skb_gro_checksum_validate_needed(struct sk_buff *skb,
2805 return ((skb->ip_summed != CHECKSUM_PARTIAL ||
2806 skb_checksum_start_offset(skb) <
2807 skb_gro_offset(skb)) &&
2808 !skb_at_gro_remcsum_start(skb) &&
2809 NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2810 (!zero_okay || check));
2813 static inline __sum16 __skb_gro_checksum_validate_complete(struct sk_buff *skb,
2816 if (NAPI_GRO_CB(skb)->csum_valid &&
2817 !csum_fold(csum_add(psum, NAPI_GRO_CB(skb)->csum)))
2820 NAPI_GRO_CB(skb)->csum = psum;
2822 return __skb_gro_checksum_complete(skb);
2825 static inline void skb_gro_incr_csum_unnecessary(struct sk_buff *skb)
2827 if (NAPI_GRO_CB(skb)->csum_cnt > 0) {
2828 /* Consume a checksum from CHECKSUM_UNNECESSARY */
2829 NAPI_GRO_CB(skb)->csum_cnt--;
2831 /* Update skb for CHECKSUM_UNNECESSARY and csum_level when we
2832 * verified a new top level checksum or an encapsulated one
2833 * during GRO. This saves work if we fallback to normal path.
2835 __skb_incr_checksum_unnecessary(skb);
2839 #define __skb_gro_checksum_validate(skb, proto, zero_okay, check, \
2842 __sum16 __ret = 0; \
2843 if (__skb_gro_checksum_validate_needed(skb, zero_okay, check)) \
2844 __ret = __skb_gro_checksum_validate_complete(skb, \
2845 compute_pseudo(skb, proto)); \
2847 skb_gro_incr_csum_unnecessary(skb); \
2851 #define skb_gro_checksum_validate(skb, proto, compute_pseudo) \
2852 __skb_gro_checksum_validate(skb, proto, false, 0, compute_pseudo)
2854 #define skb_gro_checksum_validate_zero_check(skb, proto, check, \
2856 __skb_gro_checksum_validate(skb, proto, true, check, compute_pseudo)
2858 #define skb_gro_checksum_simple_validate(skb) \
2859 __skb_gro_checksum_validate(skb, 0, false, 0, null_compute_pseudo)
2861 static inline bool __skb_gro_checksum_convert_check(struct sk_buff *skb)
2863 return (NAPI_GRO_CB(skb)->csum_cnt == 0 &&
2864 !NAPI_GRO_CB(skb)->csum_valid);
2867 static inline void __skb_gro_checksum_convert(struct sk_buff *skb,
2870 NAPI_GRO_CB(skb)->csum = ~pseudo;
2871 NAPI_GRO_CB(skb)->csum_valid = 1;
2874 #define skb_gro_checksum_try_convert(skb, proto, compute_pseudo) \
2876 if (__skb_gro_checksum_convert_check(skb)) \
2877 __skb_gro_checksum_convert(skb, \
2878 compute_pseudo(skb, proto)); \
2881 struct gro_remcsum {
2886 static inline void skb_gro_remcsum_init(struct gro_remcsum *grc)
2892 static inline void *skb_gro_remcsum_process(struct sk_buff *skb, void *ptr,
2893 unsigned int off, size_t hdrlen,
2894 int start, int offset,
2895 struct gro_remcsum *grc,
2899 size_t plen = hdrlen + max_t(size_t, offset + sizeof(u16), start);
2901 BUG_ON(!NAPI_GRO_CB(skb)->csum_valid);
2904 NAPI_GRO_CB(skb)->gro_remcsum_start = off + hdrlen + start;
2908 ptr = skb_gro_header_fast(skb, off);
2909 if (skb_gro_header_hard(skb, off + plen)) {
2910 ptr = skb_gro_header_slow(skb, off + plen, off);
2915 delta = remcsum_adjust(ptr + hdrlen, NAPI_GRO_CB(skb)->csum,
2918 /* Adjust skb->csum since we changed the packet */
2919 NAPI_GRO_CB(skb)->csum = csum_add(NAPI_GRO_CB(skb)->csum, delta);
2921 grc->offset = off + hdrlen + offset;
2927 static inline void skb_gro_remcsum_cleanup(struct sk_buff *skb,
2928 struct gro_remcsum *grc)
2931 size_t plen = grc->offset + sizeof(u16);
2936 ptr = skb_gro_header_fast(skb, grc->offset);
2937 if (skb_gro_header_hard(skb, grc->offset + sizeof(u16))) {
2938 ptr = skb_gro_header_slow(skb, plen, grc->offset);
2943 remcsum_unadjust((__sum16 *)ptr, grc->delta);
2946 #ifdef CONFIG_XFRM_OFFLOAD
2947 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2949 if (PTR_ERR(pp) != -EINPROGRESS)
2950 NAPI_GRO_CB(skb)->flush |= flush;
2952 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2955 struct gro_remcsum *grc)
2957 if (PTR_ERR(pp) != -EINPROGRESS) {
2958 NAPI_GRO_CB(skb)->flush |= flush;
2959 skb_gro_remcsum_cleanup(skb, grc);
2960 skb->remcsum_offload = 0;
2964 static inline void skb_gro_flush_final(struct sk_buff *skb, struct sk_buff *pp, int flush)
2966 NAPI_GRO_CB(skb)->flush |= flush;
2968 static inline void skb_gro_flush_final_remcsum(struct sk_buff *skb,
2971 struct gro_remcsum *grc)
2973 NAPI_GRO_CB(skb)->flush |= flush;
2974 skb_gro_remcsum_cleanup(skb, grc);
2975 skb->remcsum_offload = 0;
2979 static inline int dev_hard_header(struct sk_buff *skb, struct net_device *dev,
2980 unsigned short type,
2981 const void *daddr, const void *saddr,
2984 if (!dev->header_ops || !dev->header_ops->create)
2987 return dev->header_ops->create(skb, dev, type, daddr, saddr, len);
2990 static inline int dev_parse_header(const struct sk_buff *skb,
2991 unsigned char *haddr)
2993 const struct net_device *dev = skb->dev;
2995 if (!dev->header_ops || !dev->header_ops->parse)
2997 return dev->header_ops->parse(skb, haddr);
3000 static inline __be16 dev_parse_header_protocol(const struct sk_buff *skb)
3002 const struct net_device *dev = skb->dev;
3004 if (!dev->header_ops || !dev->header_ops->parse_protocol)
3006 return dev->header_ops->parse_protocol(skb);
3009 /* ll_header must have at least hard_header_len allocated */
3010 static inline bool dev_validate_header(const struct net_device *dev,
3011 char *ll_header, int len)
3013 if (likely(len >= dev->hard_header_len))
3015 if (len < dev->min_header_len)
3018 if (capable(CAP_SYS_RAWIO)) {
3019 memset(ll_header + len, 0, dev->hard_header_len - len);
3023 if (dev->header_ops && dev->header_ops->validate)
3024 return dev->header_ops->validate(ll_header, len);
3029 typedef int gifconf_func_t(struct net_device * dev, char __user * bufptr,
3031 int register_gifconf(unsigned int family, gifconf_func_t *gifconf);
3032 static inline int unregister_gifconf(unsigned int family)
3034 return register_gifconf(family, NULL);
3037 #ifdef CONFIG_NET_FLOW_LIMIT
3038 #define FLOW_LIMIT_HISTORY (1 << 7) /* must be ^2 and !overflow buckets */
3039 struct sd_flow_limit {
3041 unsigned int num_buckets;
3042 unsigned int history_head;
3043 u16 history[FLOW_LIMIT_HISTORY];
3047 extern int netdev_flow_limit_table_len;
3048 #endif /* CONFIG_NET_FLOW_LIMIT */
3051 * Incoming packets are placed on per-CPU queues
3053 struct softnet_data {
3054 struct list_head poll_list;
3055 struct sk_buff_head process_queue;
3058 unsigned int processed;
3059 unsigned int time_squeeze;
3060 unsigned int received_rps;
3062 struct softnet_data *rps_ipi_list;
3064 #ifdef CONFIG_NET_FLOW_LIMIT
3065 struct sd_flow_limit __rcu *flow_limit;
3067 struct Qdisc *output_queue;
3068 struct Qdisc **output_queue_tailp;
3069 struct sk_buff *completion_queue;
3070 #ifdef CONFIG_XFRM_OFFLOAD
3071 struct sk_buff_head xfrm_backlog;
3073 /* written and read only by owning cpu: */
3079 /* input_queue_head should be written by cpu owning this struct,
3080 * and only read by other cpus. Worth using a cache line.
3082 unsigned int input_queue_head ____cacheline_aligned_in_smp;
3084 /* Elements below can be accessed between CPUs for RPS/RFS */
3085 call_single_data_t csd ____cacheline_aligned_in_smp;
3086 struct softnet_data *rps_ipi_next;
3088 unsigned int input_queue_tail;
3090 unsigned int dropped;
3091 struct sk_buff_head input_pkt_queue;
3092 struct napi_struct backlog;
3096 static inline void input_queue_head_incr(struct softnet_data *sd)
3099 sd->input_queue_head++;
3103 static inline void input_queue_tail_incr_save(struct softnet_data *sd,
3104 unsigned int *qtail)
3107 *qtail = ++sd->input_queue_tail;
3111 DECLARE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
3113 static inline int dev_recursion_level(void)
3115 return this_cpu_read(softnet_data.xmit.recursion);
3118 #define XMIT_RECURSION_LIMIT 10
3119 static inline bool dev_xmit_recursion(void)
3121 return unlikely(__this_cpu_read(softnet_data.xmit.recursion) >
3122 XMIT_RECURSION_LIMIT);
3125 static inline void dev_xmit_recursion_inc(void)
3127 __this_cpu_inc(softnet_data.xmit.recursion);
3130 static inline void dev_xmit_recursion_dec(void)
3132 __this_cpu_dec(softnet_data.xmit.recursion);
3135 void __netif_schedule(struct Qdisc *q);
3136 void netif_schedule_queue(struct netdev_queue *txq);
3138 static inline void netif_tx_schedule_all(struct net_device *dev)
3142 for (i = 0; i < dev->num_tx_queues; i++)
3143 netif_schedule_queue(netdev_get_tx_queue(dev, i));
3146 static __always_inline void netif_tx_start_queue(struct netdev_queue *dev_queue)
3148 clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3152 * netif_start_queue - allow transmit
3153 * @dev: network device
3155 * Allow upper layers to call the device hard_start_xmit routine.
3157 static inline void netif_start_queue(struct net_device *dev)
3159 netif_tx_start_queue(netdev_get_tx_queue(dev, 0));
3162 static inline void netif_tx_start_all_queues(struct net_device *dev)
3166 for (i = 0; i < dev->num_tx_queues; i++) {
3167 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3168 netif_tx_start_queue(txq);
3172 void netif_tx_wake_queue(struct netdev_queue *dev_queue);
3175 * netif_wake_queue - restart transmit
3176 * @dev: network device
3178 * Allow upper layers to call the device hard_start_xmit routine.
3179 * Used for flow control when transmit resources are available.
3181 static inline void netif_wake_queue(struct net_device *dev)
3183 netif_tx_wake_queue(netdev_get_tx_queue(dev, 0));
3186 static inline void netif_tx_wake_all_queues(struct net_device *dev)
3190 for (i = 0; i < dev->num_tx_queues; i++) {
3191 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
3192 netif_tx_wake_queue(txq);
3196 static __always_inline void netif_tx_stop_queue(struct netdev_queue *dev_queue)
3198 set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3202 * netif_stop_queue - stop transmitted packets
3203 * @dev: network device
3205 * Stop upper layers calling the device hard_start_xmit routine.
3206 * Used for flow control when transmit resources are unavailable.
3208 static inline void netif_stop_queue(struct net_device *dev)
3210 netif_tx_stop_queue(netdev_get_tx_queue(dev, 0));
3213 void netif_tx_stop_all_queues(struct net_device *dev);
3214 void netdev_update_lockdep_key(struct net_device *dev);
3216 static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
3218 return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
3222 * netif_queue_stopped - test if transmit queue is flowblocked
3223 * @dev: network device
3225 * Test if transmit queue on device is currently unable to send.
3227 static inline bool netif_queue_stopped(const struct net_device *dev)
3229 return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
3232 static inline bool netif_xmit_stopped(const struct netdev_queue *dev_queue)
3234 return dev_queue->state & QUEUE_STATE_ANY_XOFF;
3238 netif_xmit_frozen_or_stopped(const struct netdev_queue *dev_queue)
3240 return dev_queue->state & QUEUE_STATE_ANY_XOFF_OR_FROZEN;
3244 netif_xmit_frozen_or_drv_stopped(const struct netdev_queue *dev_queue)
3246 return dev_queue->state & QUEUE_STATE_DRV_XOFF_OR_FROZEN;
3250 * netdev_txq_bql_enqueue_prefetchw - prefetch bql data for write
3251 * @dev_queue: pointer to transmit queue
3253 * BQL enabled drivers might use this helper in their ndo_start_xmit(),
3254 * to give appropriate hint to the CPU.
3256 static inline void netdev_txq_bql_enqueue_prefetchw(struct netdev_queue *dev_queue)
3259 prefetchw(&dev_queue->dql.num_queued);
3264 * netdev_txq_bql_complete_prefetchw - prefetch bql data for write
3265 * @dev_queue: pointer to transmit queue
3267 * BQL enabled drivers might use this helper in their TX completion path,
3268 * to give appropriate hint to the CPU.
3270 static inline void netdev_txq_bql_complete_prefetchw(struct netdev_queue *dev_queue)
3273 prefetchw(&dev_queue->dql.limit);
3277 static inline void netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3281 dql_queued(&dev_queue->dql, bytes);
3283 if (likely(dql_avail(&dev_queue->dql) >= 0))
3286 set_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3289 * The XOFF flag must be set before checking the dql_avail below,
3290 * because in netdev_tx_completed_queue we update the dql_completed
3291 * before checking the XOFF flag.
3295 /* check again in case another CPU has just made room avail */
3296 if (unlikely(dql_avail(&dev_queue->dql) >= 0))
3297 clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state);
3301 /* Variant of netdev_tx_sent_queue() for drivers that are aware
3302 * that they should not test BQL status themselves.
3303 * We do want to change __QUEUE_STATE_STACK_XOFF only for the last
3305 * Returns true if the doorbell must be used to kick the NIC.
3307 static inline bool __netdev_tx_sent_queue(struct netdev_queue *dev_queue,
3313 dql_queued(&dev_queue->dql, bytes);
3315 return netif_tx_queue_stopped(dev_queue);
3317 netdev_tx_sent_queue(dev_queue, bytes);
3322 * netdev_sent_queue - report the number of bytes queued to hardware
3323 * @dev: network device
3324 * @bytes: number of bytes queued to the hardware device queue
3326 * Report the number of bytes queued for sending/completion to the network
3327 * device hardware queue. @bytes should be a good approximation and should
3328 * exactly match netdev_completed_queue() @bytes
3330 static inline void netdev_sent_queue(struct net_device *dev, unsigned int bytes)
3332 netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes);
3335 static inline bool __netdev_sent_queue(struct net_device *dev,
3339 return __netdev_tx_sent_queue(netdev_get_tx_queue(dev, 0), bytes,
3343 static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
3344 unsigned int pkts, unsigned int bytes)
3347 if (unlikely(!bytes))
3350 dql_completed(&dev_queue->dql, bytes);
3353 * Without the memory barrier there is a small possiblity that
3354 * netdev_tx_sent_queue will miss the update and cause the queue to
3355 * be stopped forever
3359 if (unlikely(dql_avail(&dev_queue->dql) < 0))
3362 if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
3363 netif_schedule_queue(dev_queue);
3368 * netdev_completed_queue - report bytes and packets completed by device
3369 * @dev: network device
3370 * @pkts: actual number of packets sent over the medium
3371 * @bytes: actual number of bytes sent over the medium
3373 * Report the number of bytes and packets transmitted by the network device
3374 * hardware queue over the physical medium, @bytes must exactly match the
3375 * @bytes amount passed to netdev_sent_queue()
3377 static inline void netdev_completed_queue(struct net_device *dev,
3378 unsigned int pkts, unsigned int bytes)
3380 netdev_tx_completed_queue(netdev_get_tx_queue(dev, 0), pkts, bytes);
3383 static inline void netdev_tx_reset_queue(struct netdev_queue *q)
3386 clear_bit(__QUEUE_STATE_STACK_XOFF, &q->state);
3392 * netdev_reset_queue - reset the packets and bytes count of a network device
3393 * @dev_queue: network device
3395 * Reset the bytes and packet count of a network device and clear the
3396 * software flow control OFF bit for this network device
3398 static inline void netdev_reset_queue(struct net_device *dev_queue)
3400 netdev_tx_reset_queue(netdev_get_tx_queue(dev_queue, 0));
3404 * netdev_cap_txqueue - check if selected tx queue exceeds device queues
3405 * @dev: network device
3406 * @queue_index: given tx queue index
3408 * Returns 0 if given tx queue index >= number of device tx queues,
3409 * otherwise returns the originally passed tx queue index.
3411 static inline u16 netdev_cap_txqueue(struct net_device *dev, u16 queue_index)
3413 if (unlikely(queue_index >= dev->real_num_tx_queues)) {
3414 net_warn_ratelimited("%s selects TX queue %d, but real number of TX queues is %d\n",
3415 dev->name, queue_index,
3416 dev->real_num_tx_queues);
3424 * netif_running - test if up
3425 * @dev: network device
3427 * Test if the device has been brought up.
3429 static inline bool netif_running(const struct net_device *dev)
3431 return test_bit(__LINK_STATE_START, &dev->state);
3435 * Routines to manage the subqueues on a device. We only need start,
3436 * stop, and a check if it's stopped. All other device management is
3437 * done at the overall netdevice level.
3438 * Also test the device if we're multiqueue.
3442 * netif_start_subqueue - allow sending packets on subqueue
3443 * @dev: network device
3444 * @queue_index: sub queue index
3446 * Start individual transmit queue of a device with multiple transmit queues.
3448 static inline void netif_start_subqueue(struct net_device *dev, u16 queue_index)
3450 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3452 netif_tx_start_queue(txq);
3456 * netif_stop_subqueue - stop sending packets on subqueue
3457 * @dev: network device
3458 * @queue_index: sub queue index
3460 * Stop individual transmit queue of a device with multiple transmit queues.
3462 static inline void netif_stop_subqueue(struct net_device *dev, u16 queue_index)
3464 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3465 netif_tx_stop_queue(txq);
3469 * netif_subqueue_stopped - test status of subqueue
3470 * @dev: network device
3471 * @queue_index: sub queue index
3473 * Check individual transmit queue of a device with multiple transmit queues.
3475 static inline bool __netif_subqueue_stopped(const struct net_device *dev,
3478 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3480 return netif_tx_queue_stopped(txq);
3483 static inline bool netif_subqueue_stopped(const struct net_device *dev,
3484 struct sk_buff *skb)
3486 return __netif_subqueue_stopped(dev, skb_get_queue_mapping(skb));
3490 * netif_wake_subqueue - allow sending packets on subqueue
3491 * @dev: network device
3492 * @queue_index: sub queue index
3494 * Resume individual transmit queue of a device with multiple transmit queues.
3496 static inline void netif_wake_subqueue(struct net_device *dev, u16 queue_index)
3498 struct netdev_queue *txq = netdev_get_tx_queue(dev, queue_index);
3500 netif_tx_wake_queue(txq);
3504 int netif_set_xps_queue(struct net_device *dev, const struct cpumask *mask,
3506 int __netif_set_xps_queue(struct net_device *dev, const unsigned long *mask,
3507 u16 index, bool is_rxqs_map);
3510 * netif_attr_test_mask - Test a CPU or Rx queue set in a mask
3511 * @j: CPU/Rx queue index
3512 * @mask: bitmask of all cpus/rx queues
3513 * @nr_bits: number of bits in the bitmask
3515 * Test if a CPU or Rx queue index is set in a mask of all CPU/Rx queues.
3517 static inline bool netif_attr_test_mask(unsigned long j,
3518 const unsigned long *mask,
3519 unsigned int nr_bits)
3521 cpu_max_bits_warn(j, nr_bits);
3522 return test_bit(j, mask);
3526 * netif_attr_test_online - Test for online CPU/Rx queue
3527 * @j: CPU/Rx queue index
3528 * @online_mask: bitmask for CPUs/Rx queues that are online
3529 * @nr_bits: number of bits in the bitmask
3531 * Returns true if a CPU/Rx queue is online.
3533 static inline bool netif_attr_test_online(unsigned long j,
3534 const unsigned long *online_mask,
3535 unsigned int nr_bits)
3537 cpu_max_bits_warn(j, nr_bits);
3540 return test_bit(j, online_mask);
3542 return (j < nr_bits);
3546 * netif_attrmask_next - get the next CPU/Rx queue in a cpu/Rx queues mask
3547 * @n: CPU/Rx queue index
3548 * @srcp: the cpumask/Rx queue mask pointer
3549 * @nr_bits: number of bits in the bitmask
3551 * Returns >= nr_bits if no further CPUs/Rx queues set.
3553 static inline unsigned int netif_attrmask_next(int n, const unsigned long *srcp,
3554 unsigned int nr_bits)
3556 /* -1 is a legal arg here. */
3558 cpu_max_bits_warn(n, nr_bits);
3561 return find_next_bit(srcp, nr_bits, n + 1);
3567 * netif_attrmask_next_and - get the next CPU/Rx queue in \*src1p & \*src2p
3568 * @n: CPU/Rx queue index
3569 * @src1p: the first CPUs/Rx queues mask pointer
3570 * @src2p: the second CPUs/Rx queues mask pointer
3571 * @nr_bits: number of bits in the bitmask
3573 * Returns >= nr_bits if no further CPUs/Rx queues set in both.
3575 static inline int netif_attrmask_next_and(int n, const unsigned long *src1p,
3576 const unsigned long *src2p,
3577 unsigned int nr_bits)
3579 /* -1 is a legal arg here. */
3581 cpu_max_bits_warn(n, nr_bits);
3584 return find_next_and_bit(src1p, src2p, nr_bits, n + 1);
3586 return find_next_bit(src1p, nr_bits, n + 1);
3588 return find_next_bit(src2p, nr_bits, n + 1);
3593 static inline int netif_set_xps_queue(struct net_device *dev,
3594 const struct cpumask *mask,
3600 static inline int __netif_set_xps_queue(struct net_device *dev,
3601 const unsigned long *mask,
3602 u16 index, bool is_rxqs_map)
3609 * netif_is_multiqueue - test if device has multiple transmit queues
3610 * @dev: network device
3612 * Check if device has multiple transmit queues
3614 static inline bool netif_is_multiqueue(const struct net_device *dev)
3616 return dev->num_tx_queues > 1;
3619 int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq);
3622 int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq);
3624 static inline int netif_set_real_num_rx_queues(struct net_device *dev,
3627 dev->real_num_rx_queues = rxqs;
3632 static inline struct netdev_rx_queue *
3633 __netif_get_rx_queue(struct net_device *dev, unsigned int rxq)
3635 return dev->_rx + rxq;
3639 static inline unsigned int get_netdev_rx_queue_index(
3640 struct netdev_rx_queue *queue)
3642 struct net_device *dev = queue->dev;
3643 int index = queue - dev->_rx;
3645 BUG_ON(index >= dev->num_rx_queues);
3650 #define DEFAULT_MAX_NUM_RSS_QUEUES (8)
3651 int netif_get_num_default_rss_queues(void);
3653 enum skb_free_reason {
3654 SKB_REASON_CONSUMED,
3658 void __dev_kfree_skb_irq(struct sk_buff *skb, enum skb_free_reason reason);
3659 void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason);
3662 * It is not allowed to call kfree_skb() or consume_skb() from hardware
3663 * interrupt context or with hardware interrupts being disabled.
3664 * (in_irq() || irqs_disabled())
3666 * We provide four helpers that can be used in following contexts :
3668 * dev_kfree_skb_irq(skb) when caller drops a packet from irq context,
3669 * replacing kfree_skb(skb)
3671 * dev_consume_skb_irq(skb) when caller consumes a packet from irq context.
3672 * Typically used in place of consume_skb(skb) in TX completion path
3674 * dev_kfree_skb_any(skb) when caller doesn't know its current irq context,
3675 * replacing kfree_skb(skb)
3677 * dev_consume_skb_any(skb) when caller doesn't know its current irq context,
3678 * and consumed a packet. Used in place of consume_skb(skb)
3680 static inline void dev_kfree_skb_irq(struct sk_buff *skb)
3682 __dev_kfree_skb_irq(skb, SKB_REASON_DROPPED);
3685 static inline void dev_consume_skb_irq(struct sk_buff *skb)
3687 __dev_kfree_skb_irq(skb, SKB_REASON_CONSUMED);
3690 static inline void dev_kfree_skb_any(struct sk_buff *skb)
3692 __dev_kfree_skb_any(skb, SKB_REASON_DROPPED);
3695 static inline void dev_consume_skb_any(struct sk_buff *skb)
3697 __dev_kfree_skb_any(skb, SKB_REASON_CONSUMED);
3700 void generic_xdp_tx(struct sk_buff *skb, struct bpf_prog *xdp_prog);
3701 int do_xdp_generic(struct bpf_prog *xdp_prog, struct sk_buff *skb);
3702 int netif_rx(struct sk_buff *skb);
3703 int netif_rx_ni(struct sk_buff *skb);
3704 int netif_receive_skb(struct sk_buff *skb);
3705 int netif_receive_skb_core(struct sk_buff *skb);
3706 void netif_receive_skb_list(struct list_head *head);
3707 gro_result_t napi_gro_receive(struct napi_struct *napi, struct sk_buff *skb);
3708 void napi_gro_flush(struct napi_struct *napi, bool flush_old);
3709 struct sk_buff *napi_get_frags(struct napi_struct *napi);
3710 gro_result_t napi_gro_frags(struct napi_struct *napi);
3711 struct packet_offload *gro_find_receive_by_type(__be16 type);
3712 struct packet_offload *gro_find_complete_by_type(__be16 type);
3714 static inline void napi_free_frags(struct napi_struct *napi)
3716 kfree_skb(napi->skb);
3720 bool netdev_is_rx_handler_busy(struct net_device *dev);
3721 int netdev_rx_handler_register(struct net_device *dev,
3722 rx_handler_func_t *rx_handler,
3723 void *rx_handler_data);
3724 void netdev_rx_handler_unregister(struct net_device *dev);
3726 bool dev_valid_name(const char *name);
3727 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr,
3728 bool *need_copyout);
3729 int dev_ifconf(struct net *net, struct ifconf *, int);
3730 int dev_ethtool(struct net *net, struct ifreq *);
3731 unsigned int dev_get_flags(const struct net_device *);
3732 int __dev_change_flags(struct net_device *dev, unsigned int flags,
3733 struct netlink_ext_ack *extack);
3734 int dev_change_flags(struct net_device *dev, unsigned int flags,
3735 struct netlink_ext_ack *extack);
3736 void __dev_notify_flags(struct net_device *, unsigned int old_flags,
3737 unsigned int gchanges);
3738 int dev_change_name(struct net_device *, const char *);
3739 int dev_set_alias(struct net_device *, const char *, size_t);
3740 int dev_get_alias(const struct net_device *, char *, size_t);
3741 int dev_change_net_namespace(struct net_device *, struct net *, const char *);
3742 int __dev_set_mtu(struct net_device *, int);
3743 int dev_validate_mtu(struct net_device *dev, int mtu,
3744 struct netlink_ext_ack *extack);
3745 int dev_set_mtu_ext(struct net_device *dev, int mtu,
3746 struct netlink_ext_ack *extack);
3747 int dev_set_mtu(struct net_device *, int);
3748 int dev_change_tx_queue_len(struct net_device *, unsigned long);
3749 void dev_set_group(struct net_device *, int);
3750 int dev_pre_changeaddr_notify(struct net_device *dev, const char *addr,
3751 struct netlink_ext_ack *extack);
3752 int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
3753 struct netlink_ext_ack *extack);
3754 int dev_change_carrier(struct net_device *, bool new_carrier);
3755 int dev_get_phys_port_id(struct net_device *dev,
3756 struct netdev_phys_item_id *ppid);
3757 int dev_get_phys_port_name(struct net_device *dev,
3758 char *name, size_t len);
3759 int dev_get_port_parent_id(struct net_device *dev,
3760 struct netdev_phys_item_id *ppid, bool recurse);
3761 bool netdev_port_same_parent_id(struct net_device *a, struct net_device *b);
3762 int dev_change_proto_down(struct net_device *dev, bool proto_down);
3763 int dev_change_proto_down_generic(struct net_device *dev, bool proto_down);
3764 struct sk_buff *validate_xmit_skb_list(struct sk_buff *skb, struct net_device *dev, bool *again);
3765 struct sk_buff *dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
3766 struct netdev_queue *txq, int *ret);
3768 typedef int (*bpf_op_t)(struct net_device *dev, struct netdev_bpf *bpf);
3769 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
3771 u32 __dev_xdp_query(struct net_device *dev, bpf_op_t xdp_op,
3772 enum bpf_netdev_command cmd);
3773 int xdp_umem_query(struct net_device *dev, u16 queue_id);
3775 int __dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3776 int dev_forward_skb(struct net_device *dev, struct sk_buff *skb);
3777 bool is_skb_forwardable(const struct net_device *dev,
3778 const struct sk_buff *skb);
3780 static __always_inline int ____dev_forward_skb(struct net_device *dev,
3781 struct sk_buff *skb)
3783 if (skb_orphan_frags(skb, GFP_ATOMIC) ||
3784 unlikely(!is_skb_forwardable(dev, skb))) {
3785 atomic_long_inc(&dev->rx_dropped);
3790 skb_scrub_packet(skb, true);
3795 bool dev_nit_active(struct net_device *dev);
3796 void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev);
3798 extern int netdev_budget;
3799 extern unsigned int netdev_budget_usecs;
3801 /* Called by rtnetlink.c:rtnl_unlock() */
3802 void netdev_run_todo(void);
3805 * dev_put - release reference to device
3806 * @dev: network device
3808 * Release reference to device to allow it to be freed.
3810 static inline void dev_put(struct net_device *dev)
3812 this_cpu_dec(*dev->pcpu_refcnt);
3816 * dev_hold - get reference to device
3817 * @dev: network device
3819 * Hold reference to device to keep it from being freed.
3821 static inline void dev_hold(struct net_device *dev)
3823 this_cpu_inc(*dev->pcpu_refcnt);
3826 /* Carrier loss detection, dial on demand. The functions netif_carrier_on
3827 * and _off may be called from IRQ context, but it is caller
3828 * who is responsible for serialization of these calls.
3830 * The name carrier is inappropriate, these functions should really be
3831 * called netif_lowerlayer_*() because they represent the state of any
3832 * kind of lower layer not just hardware media.
3835 void linkwatch_init_dev(struct net_device *dev);
3836 void linkwatch_fire_event(struct net_device *dev);
3837 void linkwatch_forget_dev(struct net_device *dev);
3840 * netif_carrier_ok - test if carrier present
3841 * @dev: network device
3843 * Check if carrier is present on device
3845 static inline bool netif_carrier_ok(const struct net_device *dev)
3847 return !test_bit(__LINK_STATE_NOCARRIER, &dev->state);
3850 unsigned long dev_trans_start(struct net_device *dev);
3852 void __netdev_watchdog_up(struct net_device *dev);
3854 void netif_carrier_on(struct net_device *dev);
3856 void netif_carrier_off(struct net_device *dev);
3859 * netif_dormant_on - mark device as dormant.
3860 * @dev: network device
3862 * Mark device as dormant (as per RFC2863).
3864 * The dormant state indicates that the relevant interface is not
3865 * actually in a condition to pass packets (i.e., it is not 'up') but is
3866 * in a "pending" state, waiting for some external event. For "on-
3867 * demand" interfaces, this new state identifies the situation where the
3868 * interface is waiting for events to place it in the up state.
3870 static inline void netif_dormant_on(struct net_device *dev)
3872 if (!test_and_set_bit(__LINK_STATE_DORMANT, &dev->state))
3873 linkwatch_fire_event(dev);
3877 * netif_dormant_off - set device as not dormant.
3878 * @dev: network device
3880 * Device is not in dormant state.
3882 static inline void netif_dormant_off(struct net_device *dev)
3884 if (test_and_clear_bit(__LINK_STATE_DORMANT, &dev->state))
3885 linkwatch_fire_event(dev);
3889 * netif_dormant - test if device is dormant
3890 * @dev: network device
3892 * Check if device is dormant.
3894 static inline bool netif_dormant(const struct net_device *dev)
3896 return test_bit(__LINK_STATE_DORMANT, &dev->state);
3901 * netif_oper_up - test if device is operational
3902 * @dev: network device
3904 * Check if carrier is operational
3906 static inline bool netif_oper_up(const struct net_device *dev)
3908 return (dev->operstate == IF_OPER_UP ||
3909 dev->operstate == IF_OPER_UNKNOWN /* backward compat */);
3913 * netif_device_present - is device available or removed
3914 * @dev: network device
3916 * Check if device has not been removed from system.
3918 static inline bool netif_device_present(struct net_device *dev)
3920 return test_bit(__LINK_STATE_PRESENT, &dev->state);
3923 void netif_device_detach(struct net_device *dev);
3925 void netif_device_attach(struct net_device *dev);
3928 * Network interface message level settings
3933 NETIF_MSG_PROBE_BIT,
3935 NETIF_MSG_TIMER_BIT,
3936 NETIF_MSG_IFDOWN_BIT,
3938 NETIF_MSG_RX_ERR_BIT,
3939 NETIF_MSG_TX_ERR_BIT,
3940 NETIF_MSG_TX_QUEUED_BIT,
3942 NETIF_MSG_TX_DONE_BIT,
3943 NETIF_MSG_RX_STATUS_BIT,
3944 NETIF_MSG_PKTDATA_BIT,
3948 /* When you add a new bit above, update netif_msg_class_names array
3949 * in net/ethtool/common.c
3951 NETIF_MSG_CLASS_COUNT,
3953 /* Both ethtool_ops interface and internal driver implementation use u32 */
3954 static_assert(NETIF_MSG_CLASS_COUNT <= 32);
3956 #define __NETIF_MSG_BIT(bit) ((u32)1 << (bit))
3957 #define __NETIF_MSG(name) __NETIF_MSG_BIT(NETIF_MSG_ ## name ## _BIT)
3959 #define NETIF_MSG_DRV __NETIF_MSG(DRV)
3960 #define NETIF_MSG_PROBE __NETIF_MSG(PROBE)
3961 #define NETIF_MSG_LINK __NETIF_MSG(LINK)
3962 #define NETIF_MSG_TIMER __NETIF_MSG(TIMER)
3963 #define NETIF_MSG_IFDOWN __NETIF_MSG(IFDOWN)
3964 #define NETIF_MSG_IFUP __NETIF_MSG(IFUP)
3965 #define NETIF_MSG_RX_ERR __NETIF_MSG(RX_ERR)
3966 #define NETIF_MSG_TX_ERR __NETIF_MSG(TX_ERR)
3967 #define NETIF_MSG_TX_QUEUED __NETIF_MSG(TX_QUEUED)
3968 #define NETIF_MSG_INTR __NETIF_MSG(INTR)
3969 #define NETIF_MSG_TX_DONE __NETIF_MSG(TX_DONE)
3970 #define NETIF_MSG_RX_STATUS __NETIF_MSG(RX_STATUS)
3971 #define NETIF_MSG_PKTDATA __NETIF_MSG(PKTDATA)
3972 #define NETIF_MSG_HW __NETIF_MSG(HW)
3973 #define NETIF_MSG_WOL __NETIF_MSG(WOL)
3975 #define netif_msg_drv(p) ((p)->msg_enable & NETIF_MSG_DRV)
3976 #define netif_msg_probe(p) ((p)->msg_enable & NETIF_MSG_PROBE)
3977 #define netif_msg_link(p) ((p)->msg_enable & NETIF_MSG_LINK)
3978 #define netif_msg_timer(p) ((p)->msg_enable & NETIF_MSG_TIMER)
3979 #define netif_msg_ifdown(p) ((p)->msg_enable & NETIF_MSG_IFDOWN)
3980 #define netif_msg_ifup(p) ((p)->msg_enable & NETIF_MSG_IFUP)
3981 #define netif_msg_rx_err(p) ((p)->msg_enable & NETIF_MSG_RX_ERR)
3982 #define netif_msg_tx_err(p) ((p)->msg_enable & NETIF_MSG_TX_ERR)
3983 #define netif_msg_tx_queued(p) ((p)->msg_enable & NETIF_MSG_TX_QUEUED)
3984 #define netif_msg_intr(p) ((p)->msg_enable & NETIF_MSG_INTR)
3985 #define netif_msg_tx_done(p) ((p)->msg_enable & NETIF_MSG_TX_DONE)
3986 #define netif_msg_rx_status(p) ((p)->msg_enable & NETIF_MSG_RX_STATUS)
3987 #define netif_msg_pktdata(p) ((p)->msg_enable & NETIF_MSG_PKTDATA)
3988 #define netif_msg_hw(p) ((p)->msg_enable & NETIF_MSG_HW)
3989 #define netif_msg_wol(p) ((p)->msg_enable & NETIF_MSG_WOL)
3991 static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits)
3994 if (debug_value < 0 || debug_value >= (sizeof(u32) * 8))
3995 return default_msg_enable_bits;
3996 if (debug_value == 0) /* no output */
3998 /* set low N bits */
3999 return (1U << debug_value) - 1;
4002 static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu)
4004 spin_lock(&txq->_xmit_lock);
4005 txq->xmit_lock_owner = cpu;
4008 static inline bool __netif_tx_acquire(struct netdev_queue *txq)
4010 __acquire(&txq->_xmit_lock);
4014 static inline void __netif_tx_release(struct netdev_queue *txq)
4016 __release(&txq->_xmit_lock);
4019 static inline void __netif_tx_lock_bh(struct netdev_queue *txq)
4021 spin_lock_bh(&txq->_xmit_lock);
4022 txq->xmit_lock_owner = smp_processor_id();
4025 static inline bool __netif_tx_trylock(struct netdev_queue *txq)
4027 bool ok = spin_trylock(&txq->_xmit_lock);
4029 txq->xmit_lock_owner = smp_processor_id();
4033 static inline void __netif_tx_unlock(struct netdev_queue *txq)
4035 txq->xmit_lock_owner = -1;
4036 spin_unlock(&txq->_xmit_lock);
4039 static inline void __netif_tx_unlock_bh(struct netdev_queue *txq)
4041 txq->xmit_lock_owner = -1;
4042 spin_unlock_bh(&txq->_xmit_lock);
4045 static inline void txq_trans_update(struct netdev_queue *txq)
4047 if (txq->xmit_lock_owner != -1)
4048 txq->trans_start = jiffies;
4051 /* legacy drivers only, netdev_start_xmit() sets txq->trans_start */
4052 static inline void netif_trans_update(struct net_device *dev)
4054 struct netdev_queue *txq = netdev_get_tx_queue(dev, 0);
4056 if (txq->trans_start != jiffies)
4057 txq->trans_start = jiffies;
4061 * netif_tx_lock - grab network device transmit lock
4062 * @dev: network device
4064 * Get network device transmit lock
4066 static inline void netif_tx_lock(struct net_device *dev)
4071 spin_lock(&dev->tx_global_lock);
4072 cpu = smp_processor_id();
4073 for (i = 0; i < dev->num_tx_queues; i++) {
4074 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4076 /* We are the only thread of execution doing a
4077 * freeze, but we have to grab the _xmit_lock in
4078 * order to synchronize with threads which are in
4079 * the ->hard_start_xmit() handler and already
4080 * checked the frozen bit.
4082 __netif_tx_lock(txq, cpu);
4083 set_bit(__QUEUE_STATE_FROZEN, &txq->state);
4084 __netif_tx_unlock(txq);
4088 static inline void netif_tx_lock_bh(struct net_device *dev)
4094 static inline void netif_tx_unlock(struct net_device *dev)
4098 for (i = 0; i < dev->num_tx_queues; i++) {
4099 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4101 /* No need to grab the _xmit_lock here. If the
4102 * queue is not stopped for another reason, we
4105 clear_bit(__QUEUE_STATE_FROZEN, &txq->state);
4106 netif_schedule_queue(txq);
4108 spin_unlock(&dev->tx_global_lock);
4111 static inline void netif_tx_unlock_bh(struct net_device *dev)
4113 netif_tx_unlock(dev);
4117 #define HARD_TX_LOCK(dev, txq, cpu) { \
4118 if ((dev->features & NETIF_F_LLTX) == 0) { \
4119 __netif_tx_lock(txq, cpu); \
4121 __netif_tx_acquire(txq); \
4125 #define HARD_TX_TRYLOCK(dev, txq) \
4126 (((dev->features & NETIF_F_LLTX) == 0) ? \
4127 __netif_tx_trylock(txq) : \
4128 __netif_tx_acquire(txq))
4130 #define HARD_TX_UNLOCK(dev, txq) { \
4131 if ((dev->features & NETIF_F_LLTX) == 0) { \
4132 __netif_tx_unlock(txq); \
4134 __netif_tx_release(txq); \
4138 static inline void netif_tx_disable(struct net_device *dev)
4144 cpu = smp_processor_id();
4145 for (i = 0; i < dev->num_tx_queues; i++) {
4146 struct netdev_queue *txq = netdev_get_tx_queue(dev, i);
4148 __netif_tx_lock(txq, cpu);
4149 netif_tx_stop_queue(txq);
4150 __netif_tx_unlock(txq);
4155 static inline void netif_addr_lock(struct net_device *dev)
4157 spin_lock(&dev->addr_list_lock);
4160 static inline void netif_addr_lock_bh(struct net_device *dev)
4162 spin_lock_bh(&dev->addr_list_lock);
4165 static inline void netif_addr_unlock(struct net_device *dev)
4167 spin_unlock(&dev->addr_list_lock);
4170 static inline void netif_addr_unlock_bh(struct net_device *dev)
4172 spin_unlock_bh(&dev->addr_list_lock);
4176 * dev_addrs walker. Should be used only for read access. Call with
4177 * rcu_read_lock held.
4179 #define for_each_dev_addr(dev, ha) \
4180 list_for_each_entry_rcu(ha, &dev->dev_addrs.list, list)
4182 /* These functions live elsewhere (drivers/net/net_init.c, but related) */
4184 void ether_setup(struct net_device *dev);
4186 /* Support for loadable net-drivers */
4187 struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
4188 unsigned char name_assign_type,
4189 void (*setup)(struct net_device *),
4190 unsigned int txqs, unsigned int rxqs);
4191 #define alloc_netdev(sizeof_priv, name, name_assign_type, setup) \
4192 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, 1, 1)
4194 #define alloc_netdev_mq(sizeof_priv, name, name_assign_type, setup, count) \
4195 alloc_netdev_mqs(sizeof_priv, name, name_assign_type, setup, count, \
4198 int register_netdev(struct net_device *dev);
4199 void unregister_netdev(struct net_device *dev);
4201 /* General hardware address lists handling functions */
4202 int __hw_addr_sync(struct netdev_hw_addr_list *to_list,
4203 struct netdev_hw_addr_list *from_list, int addr_len);
4204 void __hw_addr_unsync(struct netdev_hw_addr_list *to_list,
4205 struct netdev_hw_addr_list *from_list, int addr_len);
4206 int __hw_addr_sync_dev(struct netdev_hw_addr_list *list,
4207 struct net_device *dev,
4208 int (*sync)(struct net_device *, const unsigned char *),
4209 int (*unsync)(struct net_device *,
4210 const unsigned char *));
4211 int __hw_addr_ref_sync_dev(struct netdev_hw_addr_list *list,
4212 struct net_device *dev,
4213 int (*sync)(struct net_device *,
4214 const unsigned char *, int),
4215 int (*unsync)(struct net_device *,
4216 const unsigned char *, int));
4217 void __hw_addr_ref_unsync_dev(struct netdev_hw_addr_list *list,
4218 struct net_device *dev,
4219 int (*unsync)(struct net_device *,
4220 const unsigned char *, int));
4221 void __hw_addr_unsync_dev(struct netdev_hw_addr_list *list,
4222 struct net_device *dev,
4223 int (*unsync)(struct net_device *,
4224 const unsigned char *));
4225 void __hw_addr_init(struct netdev_hw_addr_list *list);
4227 /* Functions used for device addresses handling */
4228 int dev_addr_add(struct net_device *dev, const unsigned char *addr,
4229 unsigned char addr_type);
4230 int dev_addr_del(struct net_device *dev, const unsigned char *addr,
4231 unsigned char addr_type);
4232 void dev_addr_flush(struct net_device *dev);
4233 int dev_addr_init(struct net_device *dev);
4235 /* Functions used for unicast addresses handling */
4236 int dev_uc_add(struct net_device *dev, const unsigned char *addr);
4237 int dev_uc_add_excl(struct net_device *dev, const unsigned char *addr);
4238 int dev_uc_del(struct net_device *dev, const unsigned char *addr);
4239 int dev_uc_sync(struct net_device *to, struct net_device *from);
4240 int dev_uc_sync_multiple(struct net_device *to, struct net_device *from);
4241 void dev_uc_unsync(struct net_device *to, struct net_device *from);
4242 void dev_uc_flush(struct net_device *dev);
4243 void dev_uc_init(struct net_device *dev);
4246 * __dev_uc_sync - Synchonize device's unicast list
4247 * @dev: device to sync
4248 * @sync: function to call if address should be added
4249 * @unsync: function to call if address should be removed
4251 * Add newly added addresses to the interface, and release
4252 * addresses that have been deleted.
4254 static inline int __dev_uc_sync(struct net_device *dev,
4255 int (*sync)(struct net_device *,
4256 const unsigned char *),
4257 int (*unsync)(struct net_device *,
4258 const unsigned char *))
4260 return __hw_addr_sync_dev(&dev->uc, dev, sync, unsync);
4264 * __dev_uc_unsync - Remove synchronized addresses from device
4265 * @dev: device to sync
4266 * @unsync: function to call if address should be removed
4268 * Remove all addresses that were added to the device by dev_uc_sync().
4270 static inline void __dev_uc_unsync(struct net_device *dev,
4271 int (*unsync)(struct net_device *,
4272 const unsigned char *))
4274 __hw_addr_unsync_dev(&dev->uc, dev, unsync);
4277 /* Functions used for multicast addresses handling */
4278 int dev_mc_add(struct net_device *dev, const unsigned char *addr);
4279 int dev_mc_add_global(struct net_device *dev, const unsigned char *addr);
4280 int dev_mc_add_excl(struct net_device *dev, const unsigned char *addr);
4281 int dev_mc_del(struct net_device *dev, const unsigned char *addr);
4282 int dev_mc_del_global(struct net_device *dev, const unsigned char *addr);
4283 int dev_mc_sync(struct net_device *to, struct net_device *from);
4284 int dev_mc_sync_multiple(struct net_device *to, struct net_device *from);
4285 void dev_mc_unsync(struct net_device *to, struct net_device *from);
4286 void dev_mc_flush(struct net_device *dev);
4287 void dev_mc_init(struct net_device *dev);
4290 * __dev_mc_sync - Synchonize device's multicast list
4291 * @dev: device to sync
4292 * @sync: function to call if address should be added
4293 * @unsync: function to call if address should be removed
4295 * Add newly added addresses to the interface, and release
4296 * addresses that have been deleted.
4298 static inline int __dev_mc_sync(struct net_device *dev,
4299 int (*sync)(struct net_device *,
4300 const unsigned char *),
4301 int (*unsync)(struct net_device *,
4302 const unsigned char *))
4304 return __hw_addr_sync_dev(&dev->mc, dev, sync, unsync);
4308 * __dev_mc_unsync - Remove synchronized addresses from device
4309 * @dev: device to sync
4310 * @unsync: function to call if address should be removed
4312 * Remove all addresses that were added to the device by dev_mc_sync().
4314 static inline void __dev_mc_unsync(struct net_device *dev,
4315 int (*unsync)(struct net_device *,
4316 const unsigned char *))
4318 __hw_addr_unsync_dev(&dev->mc, dev, unsync);
4321 /* Functions used for secondary unicast and multicast support */
4322 void dev_set_rx_mode(struct net_device *dev);
4323 void __dev_set_rx_mode(struct net_device *dev);
4324 int dev_set_promiscuity(struct net_device *dev, int inc);
4325 int dev_set_allmulti(struct net_device *dev, int inc);
4326 void netdev_state_change(struct net_device *dev);
4327 void netdev_notify_peers(struct net_device *dev);
4328 void netdev_features_change(struct net_device *dev);
4329 /* Load a device via the kmod */
4330 void dev_load(struct net *net, const char *name);
4331 struct rtnl_link_stats64 *dev_get_stats(struct net_device *dev,
4332 struct rtnl_link_stats64 *storage);
4333 void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
4334 const struct net_device_stats *netdev_stats);
4336 extern int netdev_max_backlog;
4337 extern int netdev_tstamp_prequeue;
4338 extern int weight_p;
4339 extern int dev_weight_rx_bias;
4340 extern int dev_weight_tx_bias;
4341 extern int dev_rx_weight;
4342 extern int dev_tx_weight;
4343 extern int gro_normal_batch;
4345 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
4346 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,
4347 struct list_head **iter);
4348 struct net_device *netdev_all_upper_get_next_dev_rcu(struct net_device *dev,
4349 struct list_head **iter);
4351 /* iterate through upper list, must be called under RCU read lock */
4352 #define netdev_for_each_upper_dev_rcu(dev, updev, iter) \
4353 for (iter = &(dev)->adj_list.upper, \
4354 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)); \
4356 updev = netdev_upper_get_next_dev_rcu(dev, &(iter)))
4358 int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
4359 int (*fn)(struct net_device *upper_dev,
4363 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
4364 struct net_device *upper_dev);
4366 bool netdev_has_any_upper_dev(struct net_device *dev);
4368 void *netdev_lower_get_next_private(struct net_device *dev,
4369 struct list_head **iter);
4370 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
4371 struct list_head **iter);
4373 #define netdev_for_each_lower_private(dev, priv, iter) \
4374 for (iter = (dev)->adj_list.lower.next, \
4375 priv = netdev_lower_get_next_private(dev, &(iter)); \
4377 priv = netdev_lower_get_next_private(dev, &(iter)))
4379 #define netdev_for_each_lower_private_rcu(dev, priv, iter) \
4380 for (iter = &(dev)->adj_list.lower, \
4381 priv = netdev_lower_get_next_private_rcu(dev, &(iter)); \
4383 priv = netdev_lower_get_next_private_rcu(dev, &(iter)))
4385 void *netdev_lower_get_next(struct net_device *dev,
4386 struct list_head **iter);
4388 #define netdev_for_each_lower_dev(dev, ldev, iter) \
4389 for (iter = (dev)->adj_list.lower.next, \
4390 ldev = netdev_lower_get_next(dev, &(iter)); \
4392 ldev = netdev_lower_get_next(dev, &(iter)))
4394 struct net_device *netdev_next_lower_dev_rcu(struct net_device *dev,
4395 struct list_head **iter);
4396 int netdev_walk_all_lower_dev(struct net_device *dev,
4397 int (*fn)(struct net_device *lower_dev,
4400 int netdev_walk_all_lower_dev_rcu(struct net_device *dev,
4401 int (*fn)(struct net_device *lower_dev,
4405 void *netdev_adjacent_get_private(struct list_head *adj_list);
4406 void *netdev_lower_get_first_private_rcu(struct net_device *dev);
4407 struct net_device *netdev_master_upper_dev_get(struct net_device *dev);
4408 struct net_device *netdev_master_upper_dev_get_rcu(struct net_device *dev);
4409 int netdev_upper_dev_link(struct net_device *dev, struct net_device *upper_dev,
4410 struct netlink_ext_ack *extack);
4411 int netdev_master_upper_dev_link(struct net_device *dev,
4412 struct net_device *upper_dev,
4413 void *upper_priv, void *upper_info,
4414 struct netlink_ext_ack *extack);
4415 void netdev_upper_dev_unlink(struct net_device *dev,
4416 struct net_device *upper_dev);
4417 int netdev_adjacent_change_prepare(struct net_device *old_dev,
4418 struct net_device *new_dev,
4419 struct net_device *dev,
4420 struct netlink_ext_ack *extack);
4421 void netdev_adjacent_change_commit(struct net_device *old_dev,
4422 struct net_device *new_dev,
4423 struct net_device *dev);
4424 void netdev_adjacent_change_abort(struct net_device *old_dev,
4425 struct net_device *new_dev,
4426 struct net_device *dev);
4427 void netdev_adjacent_rename_links(struct net_device *dev, char *oldname);
4428 void *netdev_lower_dev_get_private(struct net_device *dev,
4429 struct net_device *lower_dev);
4430 void netdev_lower_state_changed(struct net_device *lower_dev,
4431 void *lower_state_info);
4433 /* RSS keys are 40 or 52 bytes long */
4434 #define NETDEV_RSS_KEY_LEN 52
4435 extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
4436 void netdev_rss_key_fill(void *buffer, size_t len);
4438 int skb_checksum_help(struct sk_buff *skb);
4439 int skb_crc32c_csum_help(struct sk_buff *skb);
4440 int skb_csum_hwoffload_help(struct sk_buff *skb,
4441 const netdev_features_t features);
4443 struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
4444 netdev_features_t features, bool tx_path);
4445 struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
4446 netdev_features_t features);
4448 struct netdev_bonding_info {
4453 struct netdev_notifier_bonding_info {
4454 struct netdev_notifier_info info; /* must be first */
4455 struct netdev_bonding_info bonding_info;
4458 void netdev_bonding_info_change(struct net_device *dev,
4459 struct netdev_bonding_info *bonding_info);
4461 #if IS_ENABLED(CONFIG_ETHTOOL_NETLINK)
4462 void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data);
4464 static inline void ethtool_notify(struct net_device *dev, unsigned int cmd,
4471 struct sk_buff *skb_gso_segment(struct sk_buff *skb, netdev_features_t features)
4473 return __skb_gso_segment(skb, features, true);
4475 __be16 skb_network_protocol(struct sk_buff *skb, int *depth);
4477 static inline bool can_checksum_protocol(netdev_features_t features,
4480 if (protocol == htons(ETH_P_FCOE))
4481 return !!(features & NETIF_F_FCOE_CRC);
4483 /* Assume this is an IP checksum (not SCTP CRC) */
4485 if (features & NETIF_F_HW_CSUM) {
4486 /* Can checksum everything */
4491 case htons(ETH_P_IP):
4492 return !!(features & NETIF_F_IP_CSUM);
4493 case htons(ETH_P_IPV6):
4494 return !!(features & NETIF_F_IPV6_CSUM);
4501 void netdev_rx_csum_fault(struct net_device *dev, struct sk_buff *skb);
4503 static inline void netdev_rx_csum_fault(struct net_device *dev,
4504 struct sk_buff *skb)
4508 /* rx skb timestamps */
4509 void net_enable_timestamp(void);
4510 void net_disable_timestamp(void);
4512 #ifdef CONFIG_PROC_FS
4513 int __init dev_proc_init(void);
4515 #define dev_proc_init() 0
4518 static inline netdev_tx_t __netdev_start_xmit(const struct net_device_ops *ops,
4519 struct sk_buff *skb, struct net_device *dev,
4522 __this_cpu_write(softnet_data.xmit.more, more);
4523 return ops->ndo_start_xmit(skb, dev);
4526 static inline bool netdev_xmit_more(void)
4528 return __this_cpu_read(softnet_data.xmit.more);
4531 static inline netdev_tx_t netdev_start_xmit(struct sk_buff *skb, struct net_device *dev,
4532 struct netdev_queue *txq, bool more)
4534 const struct net_device_ops *ops = dev->netdev_ops;
4537 rc = __netdev_start_xmit(ops, skb, dev, more);
4538 if (rc == NETDEV_TX_OK)
4539 txq_trans_update(txq);
4544 int netdev_class_create_file_ns(const struct class_attribute *class_attr,
4546 void netdev_class_remove_file_ns(const struct class_attribute *class_attr,
4549 static inline int netdev_class_create_file(const struct class_attribute *class_attr)
4551 return netdev_class_create_file_ns(class_attr, NULL);
4554 static inline void netdev_class_remove_file(const struct class_attribute *class_attr)
4556 netdev_class_remove_file_ns(class_attr, NULL);
4559 extern const struct kobj_ns_type_operations net_ns_type_operations;
4561 const char *netdev_drivername(const struct net_device *dev);
4563 void linkwatch_run_queue(void);
4565 static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
4566 netdev_features_t f2)
4568 if ((f1 ^ f2) & NETIF_F_HW_CSUM) {
4569 if (f1 & NETIF_F_HW_CSUM)
4570 f1 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4572 f2 |= (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
4578 static inline netdev_features_t netdev_get_wanted_features(
4579 struct net_device *dev)
4581 return (dev->features & ~dev->hw_features) | dev->wanted_features;
4583 netdev_features_t netdev_increment_features(netdev_features_t all,
4584 netdev_features_t one, netdev_features_t mask);
4586 /* Allow TSO being used on stacked device :
4587 * Performing the GSO segmentation before last device
4588 * is a performance improvement.
4590 static inline netdev_features_t netdev_add_tso_features(netdev_features_t features,
4591 netdev_features_t mask)
4593 return netdev_increment_features(features, NETIF_F_ALL_TSO, mask);
4596 int __netdev_update_features(struct net_device *dev);
4597 void netdev_update_features(struct net_device *dev);
4598 void netdev_change_features(struct net_device *dev);
4600 void netif_stacked_transfer_operstate(const struct net_device *rootdev,
4601 struct net_device *dev);
4603 netdev_features_t passthru_features_check(struct sk_buff *skb,
4604 struct net_device *dev,
4605 netdev_features_t features);
4606 netdev_features_t netif_skb_features(struct sk_buff *skb);
4608 static inline bool net_gso_ok(netdev_features_t features, int gso_type)
4610 netdev_features_t feature = (netdev_features_t)gso_type << NETIF_F_GSO_SHIFT;
4612 /* check flags correspondence */
4613 BUILD_BUG_ON(SKB_GSO_TCPV4 != (NETIF_F_TSO >> NETIF_F_GSO_SHIFT));
4614 BUILD_BUG_ON(SKB_GSO_DODGY != (NETIF_F_GSO_ROBUST >> NETIF_F_GSO_SHIFT));
4615 BUILD_BUG_ON(SKB_GSO_TCP_ECN != (NETIF_F_TSO_ECN >> NETIF_F_GSO_SHIFT));
4616 BUILD_BUG_ON(SKB_GSO_TCP_FIXEDID != (NETIF_F_TSO_MANGLEID >> NETIF_F_GSO_SHIFT));
4617 BUILD_BUG_ON(SKB_GSO_TCPV6 != (NETIF_F_TSO6 >> NETIF_F_GSO_SHIFT));
4618 BUILD_BUG_ON(SKB_GSO_FCOE != (NETIF_F_FSO >> NETIF_F_GSO_SHIFT));
4619 BUILD_BUG_ON(SKB_GSO_GRE != (NETIF_F_GSO_GRE >> NETIF_F_GSO_SHIFT));
4620 BUILD_BUG_ON(SKB_GSO_GRE_CSUM != (NETIF_F_GSO_GRE_CSUM >> NETIF_F_GSO_SHIFT));
4621 BUILD_BUG_ON(SKB_GSO_IPXIP4 != (NETIF_F_GSO_IPXIP4 >> NETIF_F_GSO_SHIFT));
4622 BUILD_BUG_ON(SKB_GSO_IPXIP6 != (NETIF_F_GSO_IPXIP6 >> NETIF_F_GSO_SHIFT));
4623 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL != (NETIF_F_GSO_UDP_TUNNEL >> NETIF_F_GSO_SHIFT));
4624 BUILD_BUG_ON(SKB_GSO_UDP_TUNNEL_CSUM != (NETIF_F_GSO_UDP_TUNNEL_CSUM >> NETIF_F_GSO_SHIFT));
4625 BUILD_BUG_ON(SKB_GSO_PARTIAL != (NETIF_F_GSO_PARTIAL >> NETIF_F_GSO_SHIFT));
4626 BUILD_BUG_ON(SKB_GSO_TUNNEL_REMCSUM != (NETIF_F_GSO_TUNNEL_REMCSUM >> NETIF_F_GSO_SHIFT));
4627 BUILD_BUG_ON(SKB_GSO_SCTP != (NETIF_F_GSO_SCTP >> NETIF_F_GSO_SHIFT));
4628 BUILD_BUG_ON(SKB_GSO_ESP != (NETIF_F_GSO_ESP >> NETIF_F_GSO_SHIFT));
4629 BUILD_BUG_ON(SKB_GSO_UDP != (NETIF_F_GSO_UDP >> NETIF_F_GSO_SHIFT));
4630 BUILD_BUG_ON(SKB_GSO_UDP_L4 != (NETIF_F_GSO_UDP_L4 >> NETIF_F_GSO_SHIFT));
4631 BUILD_BUG_ON(SKB_GSO_FRAGLIST != (NETIF_F_GSO_FRAGLIST >> NETIF_F_GSO_SHIFT));
4633 return (features & feature) == feature;
4636 static inline bool skb_gso_ok(struct sk_buff *skb, netdev_features_t features)
4638 return net_gso_ok(features, skb_shinfo(skb)->gso_type) &&
4639 (!skb_has_frag_list(skb) || (features & NETIF_F_FRAGLIST));
4642 static inline bool netif_needs_gso(struct sk_buff *skb,
4643 netdev_features_t features)
4645 return skb_is_gso(skb) && (!skb_gso_ok(skb, features) ||
4646 unlikely((skb->ip_summed != CHECKSUM_PARTIAL) &&
4647 (skb->ip_summed != CHECKSUM_UNNECESSARY)));
4650 static inline void netif_set_gso_max_size(struct net_device *dev,
4653 dev->gso_max_size = size;
4656 static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol,
4657 int pulled_hlen, u16 mac_offset,
4660 skb->protocol = protocol;
4661 skb->encapsulation = 1;
4662 skb_push(skb, pulled_hlen);
4663 skb_reset_transport_header(skb);
4664 skb->mac_header = mac_offset;
4665 skb->network_header = skb->mac_header + mac_len;
4666 skb->mac_len = mac_len;
4669 static inline bool netif_is_macsec(const struct net_device *dev)
4671 return dev->priv_flags & IFF_MACSEC;
4674 static inline bool netif_is_macvlan(const struct net_device *dev)
4676 return dev->priv_flags & IFF_MACVLAN;
4679 static inline bool netif_is_macvlan_port(const struct net_device *dev)
4681 return dev->priv_flags & IFF_MACVLAN_PORT;
4684 static inline bool netif_is_bond_master(const struct net_device *dev)
4686 return dev->flags & IFF_MASTER && dev->priv_flags & IFF_BONDING;
4689 static inline bool netif_is_bond_slave(const struct net_device *dev)
4691 return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
4694 static inline bool netif_supports_nofcs(struct net_device *dev)
4696 return dev->priv_flags & IFF_SUPP_NOFCS;
4699 static inline bool netif_has_l3_rx_handler(const struct net_device *dev)
4701 return dev->priv_flags & IFF_L3MDEV_RX_HANDLER;
4704 static inline bool netif_is_l3_master(const struct net_device *dev)
4706 return dev->priv_flags & IFF_L3MDEV_MASTER;
4709 static inline bool netif_is_l3_slave(const struct net_device *dev)
4711 return dev->priv_flags & IFF_L3MDEV_SLAVE;
4714 static inline bool netif_is_bridge_master(const struct net_device *dev)
4716 return dev->priv_flags & IFF_EBRIDGE;
4719 static inline bool netif_is_bridge_port(const struct net_device *dev)
4721 return dev->priv_flags & IFF_BRIDGE_PORT;
4724 static inline bool netif_is_ovs_master(const struct net_device *dev)
4726 return dev->priv_flags & IFF_OPENVSWITCH;
4729 static inline bool netif_is_ovs_port(const struct net_device *dev)
4731 return dev->priv_flags & IFF_OVS_DATAPATH;
4734 static inline bool netif_is_team_master(const struct net_device *dev)
4736 return dev->priv_flags & IFF_TEAM;
4739 static inline bool netif_is_team_port(const struct net_device *dev)
4741 return dev->priv_flags & IFF_TEAM_PORT;
4744 static inline bool netif_is_lag_master(const struct net_device *dev)
4746 return netif_is_bond_master(dev) || netif_is_team_master(dev);
4749 static inline bool netif_is_lag_port(const struct net_device *dev)
4751 return netif_is_bond_slave(dev) || netif_is_team_port(dev);
4754 static inline bool netif_is_rxfh_configured(const struct net_device *dev)
4756 return dev->priv_flags & IFF_RXFH_CONFIGURED;
4759 static inline bool netif_is_failover(const struct net_device *dev)
4761 return dev->priv_flags & IFF_FAILOVER;
4764 static inline bool netif_is_failover_slave(const struct net_device *dev)
4766 return dev->priv_flags & IFF_FAILOVER_SLAVE;
4769 /* This device needs to keep skb dst for qdisc enqueue or ndo_start_xmit() */
4770 static inline void netif_keep_dst(struct net_device *dev)
4772 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM);
4775 /* return true if dev can't cope with mtu frames that need vlan tag insertion */
4776 static inline bool netif_reduces_vlan_mtu(struct net_device *dev)
4778 /* TODO: reserve and use an additional IFF bit, if we get more users */
4779 return dev->priv_flags & IFF_MACSEC;
4782 extern struct pernet_operations __net_initdata loopback_net_ops;
4784 /* Logging, debugging and troubleshooting/diagnostic helpers. */
4786 /* netdev_printk helpers, similar to dev_printk */
4788 static inline const char *netdev_name(const struct net_device *dev)
4790 if (!dev->name[0] || strchr(dev->name, '%'))
4791 return "(unnamed net_device)";
4795 static inline bool netdev_unregistering(const struct net_device *dev)
4797 return dev->reg_state == NETREG_UNREGISTERING;
4800 static inline const char *netdev_reg_state(const struct net_device *dev)
4802 switch (dev->reg_state) {
4803 case NETREG_UNINITIALIZED: return " (uninitialized)";
4804 case NETREG_REGISTERED: return "";
4805 case NETREG_UNREGISTERING: return " (unregistering)";
4806 case NETREG_UNREGISTERED: return " (unregistered)";
4807 case NETREG_RELEASED: return " (released)";
4808 case NETREG_DUMMY: return " (dummy)";
4811 WARN_ONCE(1, "%s: unknown reg_state %d\n", dev->name, dev->reg_state);
4812 return " (unknown)";
4815 __printf(3, 4) __cold
4816 void netdev_printk(const char *level, const struct net_device *dev,
4817 const char *format, ...);
4818 __printf(2, 3) __cold
4819 void netdev_emerg(const struct net_device *dev, const char *format, ...);
4820 __printf(2, 3) __cold
4821 void netdev_alert(const struct net_device *dev, const char *format, ...);
4822 __printf(2, 3) __cold
4823 void netdev_crit(const struct net_device *dev, const char *format, ...);
4824 __printf(2, 3) __cold
4825 void netdev_err(const struct net_device *dev, const char *format, ...);
4826 __printf(2, 3) __cold
4827 void netdev_warn(const struct net_device *dev, const char *format, ...);
4828 __printf(2, 3) __cold
4829 void netdev_notice(const struct net_device *dev, const char *format, ...);
4830 __printf(2, 3) __cold
4831 void netdev_info(const struct net_device *dev, const char *format, ...);
4833 #define netdev_level_once(level, dev, fmt, ...) \
4835 static bool __print_once __read_mostly; \
4837 if (!__print_once) { \
4838 __print_once = true; \
4839 netdev_printk(level, dev, fmt, ##__VA_ARGS__); \
4843 #define netdev_emerg_once(dev, fmt, ...) \
4844 netdev_level_once(KERN_EMERG, dev, fmt, ##__VA_ARGS__)
4845 #define netdev_alert_once(dev, fmt, ...) \
4846 netdev_level_once(KERN_ALERT, dev, fmt, ##__VA_ARGS__)
4847 #define netdev_crit_once(dev, fmt, ...) \
4848 netdev_level_once(KERN_CRIT, dev, fmt, ##__VA_ARGS__)
4849 #define netdev_err_once(dev, fmt, ...) \
4850 netdev_level_once(KERN_ERR, dev, fmt, ##__VA_ARGS__)
4851 #define netdev_warn_once(dev, fmt, ...) \
4852 netdev_level_once(KERN_WARNING, dev, fmt, ##__VA_ARGS__)
4853 #define netdev_notice_once(dev, fmt, ...) \
4854 netdev_level_once(KERN_NOTICE, dev, fmt, ##__VA_ARGS__)
4855 #define netdev_info_once(dev, fmt, ...) \
4856 netdev_level_once(KERN_INFO, dev, fmt, ##__VA_ARGS__)
4858 #define MODULE_ALIAS_NETDEV(device) \
4859 MODULE_ALIAS("netdev-" device)
4861 #if defined(CONFIG_DYNAMIC_DEBUG)
4862 #define netdev_dbg(__dev, format, args...) \
4864 dynamic_netdev_dbg(__dev, format, ##args); \
4866 #elif defined(DEBUG)
4867 #define netdev_dbg(__dev, format, args...) \
4868 netdev_printk(KERN_DEBUG, __dev, format, ##args)
4870 #define netdev_dbg(__dev, format, args...) \
4873 netdev_printk(KERN_DEBUG, __dev, format, ##args); \
4877 #if defined(VERBOSE_DEBUG)
4878 #define netdev_vdbg netdev_dbg
4881 #define netdev_vdbg(dev, format, args...) \
4884 netdev_printk(KERN_DEBUG, dev, format, ##args); \
4890 * netdev_WARN() acts like dev_printk(), but with the key difference
4891 * of using a WARN/WARN_ON to get the message out, including the
4892 * file/line information and a backtrace.
4894 #define netdev_WARN(dev, format, args...) \
4895 WARN(1, "netdevice: %s%s: " format, netdev_name(dev), \
4896 netdev_reg_state(dev), ##args)
4898 #define netdev_WARN_ONCE(dev, format, args...) \
4899 WARN_ONCE(1, "netdevice: %s%s: " format, netdev_name(dev), \
4900 netdev_reg_state(dev), ##args)
4902 /* netif printk helpers, similar to netdev_printk */
4904 #define netif_printk(priv, type, level, dev, fmt, args...) \
4906 if (netif_msg_##type(priv)) \
4907 netdev_printk(level, (dev), fmt, ##args); \
4910 #define netif_level(level, priv, type, dev, fmt, args...) \
4912 if (netif_msg_##type(priv)) \
4913 netdev_##level(dev, fmt, ##args); \
4916 #define netif_emerg(priv, type, dev, fmt, args...) \
4917 netif_level(emerg, priv, type, dev, fmt, ##args)
4918 #define netif_alert(priv, type, dev, fmt, args...) \
4919 netif_level(alert, priv, type, dev, fmt, ##args)
4920 #define netif_crit(priv, type, dev, fmt, args...) \
4921 netif_level(crit, priv, type, dev, fmt, ##args)
4922 #define netif_err(priv, type, dev, fmt, args...) \
4923 netif_level(err, priv, type, dev, fmt, ##args)
4924 #define netif_warn(priv, type, dev, fmt, args...) \
4925 netif_level(warn, priv, type, dev, fmt, ##args)
4926 #define netif_notice(priv, type, dev, fmt, args...) \
4927 netif_level(notice, priv, type, dev, fmt, ##args)
4928 #define netif_info(priv, type, dev, fmt, args...) \
4929 netif_level(info, priv, type, dev, fmt, ##args)
4931 #if defined(CONFIG_DYNAMIC_DEBUG)
4932 #define netif_dbg(priv, type, netdev, format, args...) \
4934 if (netif_msg_##type(priv)) \
4935 dynamic_netdev_dbg(netdev, format, ##args); \
4937 #elif defined(DEBUG)
4938 #define netif_dbg(priv, type, dev, format, args...) \
4939 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args)
4941 #define netif_dbg(priv, type, dev, format, args...) \
4944 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4949 /* if @cond then downgrade to debug, else print at @level */
4950 #define netif_cond_dbg(priv, type, netdev, cond, level, fmt, args...) \
4953 netif_dbg(priv, type, netdev, fmt, ##args); \
4955 netif_ ## level(priv, type, netdev, fmt, ##args); \
4958 #if defined(VERBOSE_DEBUG)
4959 #define netif_vdbg netif_dbg
4961 #define netif_vdbg(priv, type, dev, format, args...) \
4964 netif_printk(priv, type, KERN_DEBUG, dev, format, ##args); \
4970 * The list of packet types we will receive (as opposed to discard)
4971 * and the routines to invoke.
4973 * Why 16. Because with 16 the only overlap we get on a hash of the
4974 * low nibble of the protocol value is RARP/SNAP/X.25.
4988 #define PTYPE_HASH_SIZE (16)
4989 #define PTYPE_HASH_MASK (PTYPE_HASH_SIZE - 1)
4991 extern struct net_device *blackhole_netdev;
4993 #endif /* _LINUX_NETDEVICE_H */